Trailing-Edge
-
PDP-10 Archives
-
bb-bt99h-bb
-
filfnd.x14
There are 3 other files named filfnd.x14 in the archive. Click here to see a list.
TITLE FILFND LEVEL D DISK SERVICE ROUTINE V770
SUBTTL DESIGNED BY T.HASTINGS,T.WACHS,C.WHITE CODED BY T.WACHS/TW 20 MAY 86
SEARCH F,S
$RELOC
$HIGH
;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY ONLY BE USED
; OR COPIED IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE.
;
.CPYRT<1973,1986>
;COPYRIGHT (C) 1973,1974,1975,1976,1977,1978,1979,1980,1982,1984,1986
;BY DIGITAL EQUIPMENT CORP., MAYNARD, MASS.
;ALL RIGHTS RESERVED.
;
;
XP VFLFND,770
;ASSEMBLY INSTRUCTIONS: FILFND,FILFND/C_F,S,FILFND
ENTRY FILFND
FILFND::
;BITS IN THE ACCESS TABLE STATUS WORD
ACPCRE==:40
ACPSUP==:20
ACPUPD==:10
ACPREN==:200
ACRSUP==:2
ACPNIU==:400000
ACMCNT==:377400
ACPSMU==:4
IOSMON==400000 ;THIS FILE IS CURRENTLY DOING MONITOR IO
IOSAU==200000 ;THIS FILE HAS THE ALTER-UFD RESOURCE
IOSUPR==100000 ;SUPER USETI/USETO DONE ON THIS CHAN
IOSDA==40000 ;THIS FIL HAS DISK ALLOCATION QUEUE
IOSRIB==20000 ;RIB IS IN MONITOR BUFFER
IOSRDC==10000 ;THIS USER CHANNEL HAS READ COUNT UP FOR FILE
IOSWLK==4000 ;FILE (WHOLE STR) IS SOFTWARE WRITE-=LOCKED
; EITHER FOR ALL JOBS OR FOR THIS JOB ONLY
IOSPBF==2000 ;PARTIAL BUFFER DONE
IOSFIR==1000 ;COMPUTE AND STORE OR CHECK THE CHECKSUM
IOSHMS==IOBEG ;HUNG-DEVICE MESSAGE ALREADY TYPED
IOSRST==IOFST ;RESET (RELEASE) WAS DONE ON A SPOOLED DEVICE
;THE FOLLOWING S BITS ARE DEFINED IN COMMON.MOD
;BECAUSE THEY WANT TO BE IN THE SAME POSITION IN S AS IN RIB STATUS WORD
;IOSHRE=100 ;HARD READ ERROR ENCOUNTERED
;IOSHWE=200 ;HARD WRITE ERROR ENCOUNTERED
;IOSSCE=400 ;SOFTWARE CHECKSUM ERROR ENCOUNTERED OR HARD POSITIONING ERROR
;IOSERR=IOSHRE+IOSHWE+IOSSCE
;IOSMER=-IOSERR
DEFINE NOSCHEDULE <>
DEFINE SCHEDULE <>
IFE FTCBDB,<
DEFINE CBDBUG(A,B) <>
>
IFN FTCBDB,<
DEFINE CBDBUG(A,B)<
AOSA .+1
0
IFIDN <A>,<Y><
EXCH T1,CBUSER##
CAME T1,.CPJOB##
HALT .
EXCH T1,CBUSER##
>
IFIDN <B>,<Y><
PUSHJ P,CKBAS
>
>
>
REPEAT 0,<
ASSUME NO EXEC-MODE RESCHEDULING
RULES:
NN CAN READ WITHOUT CB RES WRITE WITHOUT
NC CAN READ WITHOUT, NEED CB TO WRITE
CN NEED CB TO READ, CAN WRITE WITHOUT
CC NEED CB TO READ, NEED CB TO WRITE
PPBNAM## NC
PPBSYS## CC (LINK)
PPBKNO##,YES CC
PPBUFB## CC
PPBLOK## NN
PPBNMB## CC
PPBNLG## NN
UFBTAL## NN
UFBPPB## CC (LINK)
UFBRRV NN
UFBUN1##,1PT NN
UFBFSN NC
UFBPT1## NN
UFBWRT## NN
UFBQTF NN
NMBNAM## NC
NMBPPB## CC (LINK)
NMBKNO##,YES CC
NMBFSN##,CFP NN
NMBEXT## NC
NMBNMB## CC (SFD)
NMBACC## CC
NMBSFD## NC
NMBGRB## NC
ACCAKB## NC
ACCPPB## NC
ACCNMB## CC (LINK)
ACCSTS## NC (STS+NIO+REN+DEL)
ACCCNT## NN
ACCUSE## NC (SFD)
ACCFSN## NC
ACCWRT## NN
ACCDOR## CC
ACCALC## NN
ACCADT## NN
ABC NN
LBS NN
1PT NN
UN1,PT1,DIR NC
NDL NC
SBC NN
PRV NN
MOD,CTM,CDT NN
>
IFN FTCBDB,<
;INTEGRITY CHECKER FOR IN-CORE DATA BASE
;ERROR DETECTED - HALT
;PRESERVES ALL ACS
;ROUTINE TO CHECK AN ADDRESS
;CKADR RETURNS CPOPJ1 IF 0, ELSE CPOPJ
;CKADN HALTS IF 0 ELSE CPOPJ
;CKADF CHECKS THAT THE BLOCK IS NOT ON THE FREE-CORE LIST
;HALT IF ADDR OUT OF RANGE OR ON FREE-CORE LIST
;WIPES OUT P4
CKADR: JUMPE P2,CPOPJ1##
CKADN: SKIPN P2
PUSHJ P,CKBAD
CAILE P2,PATCH##
CAMLE P2,SYSSIZ##
PUSHJ P,CKBAD
CKADF: HLRZ P4,SYSCOR##
CKAD1: JUMPE P4,CPOPJ##
CAIN P4,(P2)
PUSHJ P,CKBAD
HLRZ P4,CORLNK##(P4)
JRST CKAD1
CKBAD: HALT .
;DRIVER FOR INTEGRITY CHECKER
;PRESERVES ALL ACS
CKBAS:: PUSHJ P,SAVE4##
HLRZ P2,SYSPPB##
JUMPE P2,CPOPJ##
CKBA1: PUSHJ P,CKADN ;NEXT PPB
MOVE P1,P2
HLRZ P2,PPBUFB##(P1)
CKBA2: PUSHJ P,CKADR ;NEXT UFB
HLRZ P2,UFBPPB##(P2)
JUMPN P2,CKBA2
HLRZ P2,PPBNMB##(P1)
CKBA3: PUSHJ P,CKADR ;NEXT NMB
SKIPA P3,P2
JRST CKBA7
HLRZ P2,NMBACC##(P2)
CKBA4: PUSHJ P,CKADN ;NEXT A.T.
TRZE P2,DIFNAL##
JRST CKBA5
HLRZ P2,ACCNMB##(P2)
JRST CKBA4
CKBA5: HLRZ P3,NMBRNG##(P2)
JUMPE P3,CKBA6
MOVE P2,P3
TRZN P2,NMPUPT##
JRST CKBA3
CKBA6: HLRZ P2,NMBPPB##(P2)
TRZE P2,NMPUPT##
JRST CKBA6
JUMPN P2,CKBA3
CKBA7: HLRZ P2,PPBSYS##(P1)
JUMPN P2,CKBA1
HRRZ P2,SYSPPB## ;RH(SYSPPB) 0
JUMPE P2,CKBA9
HLRZ P1,SYSPPB## ;OR MUST POINT TO
CKBA8: CAIN P1,(P2) ; SOME PPB
JRST CKBA9
HLRZ P1,PPBSYS##(P1)
JUMPN P1,CKBA8
HALT . ;IT DOESN'T - HALT
HLRZ P2,SYSDOR##
MOVEI P1,SYSDOR##
CKBAC: PUSHJ P,CKADR
SKIPA P3,ACCDOR##(P2)
POPJ P,
CAIE P1,(P3)
HALT .
MOVE P1,P2
HLRZ P2,ACCDOR##(P2)
JRST CKBAC
> ;END FTCBDB CONDITIONAL
SUBTTL HIGH AVAILABILITY UUO ERROR RETURNS
;ERROR CODES RETURNED BY HIGH AVAILABILITY UUOS
.ERDIP==1 ;KONTROLLER/CHANNEL OFF-LINE ALREADY IN PROGRESS
.ERNSK==2 ;NO SUCH KONTROLLER
.ERPSS==3 ;PROBLEM WITH SWAPPING SPACE
.ERUIS==4 ;UNIT IS IN A FILE STRUCTURE
.ERNES==5 ;NOT ENOUGH SPACE FOR IOWDS
;ADD SWAPPING UNIT ERROR CODES
.ERNSU==1 ;NO SUCH UNIT
.ERAIS==2 ;ALREADY IN SWAPPING LIST
.ERSIF==3 ;SWPTAB IS FULL
.ERNM4==4 ;BLOCKS/CYLINDER NOT MULTIPLE OF 4
.ERNSS==5 ;NO SWAPPING SPACE ON PACK
ERCODE HIAARP,.ERDIP ;SETTING OFF-LINE ALREADY IN PROGRESS
ERCODE HIANSK,.ERNSK ;NO SUCH CONTROLLER
ERCODE HIANES,.ERPSS ;NOT ENOUGH SWAPPING SPACE IF CONTROLLER OFF-LINE
ERCODE HIAUFS,.ERUIS ;UNIT IN A F.S. CANNOT BE PUT OFF-LINE
ERCODE HIANEL,.ERNES ;NOT ENOUGH LOW CORE 4-WORD IOWD SPACE AVAILABLE
ERCODE HIANSU,.ERNSU ;NO SUCH UNIT
ERCODE HIAAIS,.ERAIS ;ALREADY IN SWAPPING LIST
ERCODE HIASIF,.ERSIF ;SWPTAB IS FULL
ERCODE HIANM4,.ERNM4 ;BLOCKS/CTL NOT MULTIPLE OF 4
ERCODE HIANSS,.ERNSS ;NO SWAPPING
SUBTTL HIGH-AVAILABILITY UUOS
SOONDN::SKIPE MIGRAT## ;A KONTROL/CHAN ALREADY BEING TAKEN DOWN?
JRST HIAARP ;YES, CANT DO 2 AT ONCE
PUSHJ P,DWNKON ;NO, GET 1ST UNIT ON KONTROLLER
JRST HIANSK ;NO SUCH KONTROLLER
MOVEI T3,0 ;T3 WILL ACCUMULATE SWAPPING SPACE
SOOND1: PUSHJ P,NXDWN ;GET 1ST (OR NEXT) UNIT
JRST SOOND2 ;END
JRST SOOND1 ;NOT A SWAPPING UNIT
LDB T1,UNYK4S## ;GET AMOUNT OF SWAP SPACE ON UNIT
LSH T1,K2PLSH## ;CONVERT TO K
ADD T3,T1 ;ACCUMULATE
JRST SOOND1 ;AND TEST NEXT UNIT
SOOND2: CAML T3,VIRTAL## ;TRYING TO REMOVE TOO MUCH SWAP SPACE?
JRST HIANES ;YES, ERROR RETURN
JUMPE T3,SOOND5 ;NO, GO IF NO SWAP UNITS
MOVNS T3 ;SWAPPING UNITS, REDUCE VIRTAL
SKIPGE T4 ;IF REMOVE SWAP SPACE
SKIPA T4,T3 ;SAVE VIRTAL, DECREMENT LATER
ADDM T3,VIRTAL##
PUSH P,P1
PUSH P,T4 ;SAVE SOME ACS
IFN FTMP,<
PUSHJ P,UPMM## ;GET MEMORY MANAGEMENT RESOURCE
>
MOVE P1,SEGPTR##
SOON2A: MOVSI T1,400000 ;IF TAG NO SWAP SPACE (-INF)
MOVEM T1,UNIFKS##(U) ;..
SOON2B:
SOON2C:
IFN FTMP,<
PUSHJ P,DWNMM##
>
POP P,T4
POP P,P1
MOVE J,.CPJOB## ;RESTORE ACS
IFN FTIPCF,<
MOVEI T2,JOBMAX##
MOVNM T2,MIGRAT ;FLAG WORKING ON IPCF STUFF
>
MOVEI T2,1 ;SET A FLAG SO JOBS WILL
IFE FTIPCF,<
MOVEM T2,MIGRAT## ; BE SWAPPED OFF THE BAD UNIT(S)
>
MOVEI T1,JS.MIG ;CLEAR BIT IN EACH JOBS STATUS WORD
SOOND3: ANDCAM T1,JBTST2##(T2) ;BIT WILL BE SET WHEN JOB HAS SWAPPED
CAMG T2,HIGHJB## ; SO IS NO LONGER ON THE BAD UNIT
AOJA T2,SOOND3
SOOND5: HLL T3,UNISWP##(U)
TLNN T3,-1
HLL T3,SWPUNI## ;ENSURE SWPUN2 ISNT POINTING AT A REMOVED UNIT
HLRZ T2,SWPUN2##
CAIN T2,(U)
HLLM T3,SWPUN2##
HLRZ T2,NXTSUN## ;ENSURE NXTSUN ISNT POINTING AT A REMOVED UNIT
CAIN T2,(U)
HLLM T3,NXTSUN##
IFN FTIPCF,<
PUSH P,T4 ;SAVE ENTRY FLAG
PUSH P,U
SOON5A:
IFN FTMP,<
PUSHJ P,UPMM##
>
PUSHJ P,BMSLST## ;MAKE EVERYTHING ON PAGE QUEUES GO OUT
IFN FTMP,<
PUSHJ P,DWNMM## ;OK TO RELEASE MM NOW AS PAGING I/O WILL WAIT
> ;FOR MIGRATE TO PASS
SOON5B: SKIPN PAGIPQ## ;I/O IN PROGRESS NOW?
JRST SOON5D ;NO
MOVEI T1,^D1 ;SLEEP A BIT
PUSHJ P,SLEEPF##
JRST SOON5B
SOON5D:
SKIPN PAGINC## ;MAKE SURE ALL QUEUES FLUSHED
SKIPE PAGSNC##
JRST SOON5A ;TRY AGAIN
IFN FTMP,<
PUSHJ P,UPMM## ;NEED THE MM AGAIN
>
PUSHJ P,FLSOPQ## ;FLUSH "OUT" QUEUE - PUT PAGES ON FREE CORE LIST
IFN FTMP,<
PUSHJ P,DWNMM##
>
POP P,U ;RESTORE U
SKIPA T1,[FNDIPC##] ;START AT THE VERY BEGINNING
SOOND6: MOVEI T1,FNDIP0## ;DON'T START AT THE TOP AGAIN
PUSHJ P,(T1) ;ANY IPCF PAGES ON THE UNIT?
JRST SOOND7 ;NONE OR ALL HAVE BEEN MIGRATED
MOVE J,.CPJOB## ;GET JOB # BACK
PUSH P,T1 ;SAVE ADDRESS IN PACKET OF DISK ADDRESS OF PAGE
PUSH P,T4 ;SAVE DISK ADDRESS OF THE PAGE
IFN FTMP,<
PUSHJ P,UPMM## ;MUST HAVE THE MM RESOURCE
>
IFN FTXMON,<
XJRST [MCSEC1+.+1] ;MUST BE IN SECTION 1
>
MOVEI T3,1 ;GET ONE PAGE OF PHYSICAL MEMORY
PUSHJ P,GETPHP## ; ..
SSX T1,MS.MEM ;SET SECTION INDEX FOR PAGTAB
MOVSI T2,MONTRB+TNCSHB;GETPHP TURNED THESE BITS ON
ANDCAM T2,PAGTAB(T1) ;CLEAR THEM
MOVSI T2,IPCBIT ;THIS WILL BE AN IPCF PAGE
IORM T2,PAGTAB(T1) ;SO INDICATE THAT BY SETTING THE BIT
POP P,T4 ;RESTORE DISK ADDRESS
TLO T4,(MT.LEF) ;MAKE MEMTAB ENTRY
MOVEM T4,MEMTAB(T1) ;STORE IT
IFN FTMP,<
PUSHJ P,DWNMM## ;GIVE UP THE MM
>
IFN FTXMON,<
JRST @[0,,.+1] ;BACK TO SECTION 0
HRRZS T1 ;CLEAR SECTION NUMBER
>
PUSH P,T1 ;SAVE PHYSICAL PAGE
LSH T1,11 ;POSITION PAGE NUMBER FOR A SWPLST ENTRY
TDO T1,[SL.IPC+1] ;MAKE A SWPLST ENTRY FOR SWAP-IN
PUSHJ P,PAGEIT## ;SWAP IN THE IPCF PAGE
JFCL ;**********PAGING I/O ERROR
POP P,T2 ;RESTORE PHYSICAL PAGE NUMBER
PUSHJ P,IPCPAG## ;PAGE OUT THE PAGE ON A NEW UNIT
JFCL ;**********PAGING I/O ERROR
POP P,T1 ;RESTORE ADDRESS IN THIS PACKET
MOVEM T2,(T1) ;STORE PAGE NUMBER ON NEW UNIT
PUSHJ P,IPCULK## ;RELEASE IPCF INTERLOCK FOR THIS JOB
JRST SOOND6 ;SEE IF ANY MORE IPCF PAGES ON THE UNIT
SOOND7: MOVEI T4,1 ;NOW FLAG WORKING ON JOBS
MOVEM T4,MIGRAT##
POP P,T4 ;RESTORE ENTRY FLAG
>;END IFN FTIPCF
JUMPL T4,REMSW2 ;GO BACK IF CALLED FROM REMSWP
HLRZ T2,SWPUNI## ;MAKE SURE SWPUNI ISNT POINTING AT A REMOVED UNIT
CAIN T2,(U) ; (IF REMSWP WE WILL UNLINK IT LATER)
HLLM T3,SWPUNI##
MOVSI T1,UNPNNA## ;GET THE BIT
IORM T1,UNIUST##(U) ;INDICATE NO NEW ACCESSES FOR EACH UNIT
IFN FTMDA,<
SETZM UNILTM##(U) ;CLEAR LOCKTIME
> ;END IFN FTMDA
HLRZ U,UNICHN##(U) ;STEP TO NEXT UNIT ON CHAN
CAME U,T4 ;AND SET NNA FOR IT
JRST SOOND5
JRST CPOPJ1## ;DONE, GOOD RETURN
NOWDWN::PUSHJ P,DWNKON ;GET KONTROLLER, 1ST UNIT
JRST HIANSK ;NO SUCH KONTROLLER
SKIPE MIGRAT## ;STILL SWAPPING ON UNIT?
JRST HIANES ;YES, ERROR RETURN
MOVSI T3,UNPNNA## ;NO, WAS NNA LIT FOR THE UNIT/CHAN?
TDNN T3,UNIUST##(U)
JRST HIAARP ;HAVE TO LIGHT NO NEW ACCESSES FIRST
PUSHJ P,SAVE4## ;IF DODELE WONT SAVE ACS WE WILL
NOWDW1: PUSHJ P,NXDWN ;GET 1ST, OR NEXT, UNIT ON CHAN
JRST NOWDW3 ;NO MORE
JRST NOWDW2 ;NOT A SWAPPING UNIT
IFN FTMP,<
PUSHJ P,GGVMM## ;GET MM
>
PUSH P,T4
MOVEI P2,-1 ;DELETE ALL DORMANT SEGS ON THE
PUSHJ P,DODELE## ; UNIT
JFCL
POP P,T4
NOWDW2: HRRZ T1,UNISTR##(U) ;UNIT IN A FILE STRUCTURE?
JUMPN T1,HIAUFS ;UNIT MUST NOT BE IN A STR
JRST NOWDW1 ;NO, TEST NEXT UNIT ON CHAN
NOWDW3:
IFN FTKL10,<
PUSHJ P,GCH4WD## ;GET A 4-WORD LOW CORE BLOCK FOR IOWDS
JRST HIANEL ;NOT ENOUGH SPACE
>
IFN FTKS10,<
SETZ T1, ;DON'T NEED LOW-CORE SPACE FOR UNIBUS
>
AOS (P) ;GOOD RETURN
JRST STOTAC## ;TELL USER IOWD LOC AND RETURN
;REMOVE DISK UNIT FROM SWAPPING LIST
;CALL WITH
;(T1) = FUNCTION,DRIVE ADDR
;(M) = RH = ADD (RPA?)
REMSWP::SKIPE MIGRAT## ;ALREADY BEING TAKEN DOWN
JRST HIAARP ;YES, ERROR
PUSHJ P,GETWDU## ;GET DRIVE NAME FROM USER
JUMPE T1,[SETO U, ;REMOVE 'DEAD' UNITS
JRST REMSW1]
SETO T2, ;UNIT NAMES ARE 6 CHARS
PUSHJ P,SRUNI ;SET UP UDB IN U
JRST HIANSU ;NO SUCH UNIT
JRST HIANSU ;LOGICAL MATCH
SKIPL UNIPTR##(U) ;UNIT IN ASL?
JRST CPOPJ1 ;NO, RETURN IMMEDIATELY
REMSW1: MOVSI T3,MSWPMX## ;GET LENGTH OF SWPTAB
CAME U,SWPTAB##(T3) ;IS UNIT IN TABLE?
AOBJN T3,.-1 ;NOT HERE, TRY NEXT
JUMPGE T3,CPOPJ1## ;NOT AT ALL, QUIT
SETO T4, ;MARK THIS ROUTINE
JUMPL U,SOOND2 ;DEALLOCATE SPACE
LDB T3,UNYK4S## ;GET AMOUNT OF SWAPPING
JUMPLE T3,CPOPJ1 ;NONE, TAKE GOOD RETURN
LSH T3,K2PLSH## ;CONVERT TO K
MOVSI T1,UNPRSS## ;INDICATE REMOVING SWAP SPACE
CAMGE T3,VIRTAL##
IORM T1,UNIUST##(U)
PJRST SOOND2 ;DE-ALLOCATE SPACE
;HERE WHEN MIGRAT IS SET UP
REMSW2: MOVE J,.CPJOB##
SKIPN MIGRAT## ;MIGRATING YET?
JRST REMSW3 ;NO, MUST BE DONE
MOVEI T1,5 ;GO TO SLEEP FOR A WHILE
PUSHJ P,SLEEP## ;AND WAIT
JRST REMSW2 ;CHECK AGAIN
;HERE WHEN UNIT IS NOT BEING USED AS A SWAPPER
REMSW3: JUMPLE U,REMS3A ;ALREADY GONE
ADDM T4,VIRTAL## ;LESS SWAPPING SPACE
ADDM T4,K4SWAP## ;SO SYSDPY KNOWS
MOVSI T1,UNPRSS##
ANDCAM T1,UNIUST##(U)
REMS3A:
IFN FTMP,<
PUSHJ P,GGVMM## ;GET MM
>
PUSH P,P2
MOVEI P2,-1 ;GET RID OF DORMANT SEGMENTS
PUSHJ P,DODELE## ; ON THIS UNIT
JFCL
POP P,P2
MOVSI T1,MSWPMX## ;# OF SWAP TABLE ENTRIES
REMS3D: CAMN U,SWPTAB##(T1) ;LOOK FOR UNIT ENTRY
JRST REMSW4 ;FOUND IT
AOBJN T1,.-2
JRST CPOPJ1## ;WHAT!? NOT STILL THERE?!! VIRTAL IS WRONG
REMSW4: SETZM SWPTAB##(T1) ;CLEAR ENTRY
JUMPL U,REMS3D ;CLEAR ALL -1S
;UNLINK SWAPPER FOR SYSTAT
MOVEI T1,SWPUNI##-UNISWP## ;PRESET PRED FOR 1ST SWAP UNIT
REMSW6: HLRZ T2,UNISWP##(T1) ;GET UDB
CAMN T2,U ;IS IT THE ONE WE ARE REMOVING
JRST REMSW7 ;YES
MOVE T1,T2 ;NO, STEP TO NEXT
JRST REMSW6
REMSW7: HLR T2,UNISWP##(U) ;YES
HRLM T2,UNISWP##(T1) ;RE-LINK
SETOM UNIFKS##(U)
PUSHJ P,ASLBLD## ;REBUILD THE PRESERVED ASL
JFCL ;BOOTSTRAP NOT AVAILABLE
JRST CPOPJ1## ;TAKE GOOD RETURN
;THIS ROUTINE LETS A PRIVILEDGED JOB ALLOW
;ACCESS TO A UNIT WHICH WAS IN MDA STATE.
;TYPICALLY DONE AFTER READING HOM BLOCKS
IFN FTMDA,<
CLRMDA::PUSHJ P,GETWDU## ;GET DRIVE NAME
SETO T2, ;UNIT NAMES ARE 6 CHARS
PUSHJ P,SRUNI ;GET THE UDB
JRST HIANSU ;NO SUCH UNIT
JRST HIANSU ;DISSALLOW LOGICAL MATCH
MOVSI T1,UNPWMD## ;GET WAITING FOR MDA
ANDCAM T1,UNIDES##(U) ;CLEAR IT
IFN FTDUAL,<
SKIPE T2,UNI2ND##(U) ;AUXILLIARY PORT?
ANDCAM T1,UNIDES##(T2) ;YES, IT'S NOT WAITING.
>;IFN FTDUAL
MOVE T2,UNISTS##(U) ;GET CURRENT STATUS
CAIN T2,MDACOD## ;'MDA' IDLE?
SETZM UNISTS##(U) ;YES, MAKE A REAL IDLE
IFN FTDUAL,<
PUSHJ P,SECCOD## ;SET OTHER PORT.
>;IFN FTDUAL
JRST CPOPJ1## ;WIN!
>;IFN FTMDA
;ADD A SWAPPER TO THE ACTIVE SWAPPING LIST
ADDSWP::SE1ENT ;MAKE SATS ADDRESSABLE
PUSHJ P,GETWDU## ;GET DRIVE NAME
SETO T2, ;UNIT NAMES ARE 6 CHARS
PUSHJ P,SRUNI ;SET UP UDB IN U
JRST HIANSU ;NO SUCH UNIT
JRST HIANSU ;LOGICAL MATCH, LOSE
PUSHJ P,SAVE3##
SETZ P1, ;NO EMPTY SLOT
MOVSI T2,MSWPMX##
ADDSW0: CAMN U,SWPTAB##(T2) ;IF ALREADY IN SWPTAB
JRST HIAAIS ; CALLER IS VERY CONFUSED
JUMPN P1,.+3
SKIPN SWPTAB##(T2)
MOVE P1,T2
AOBJN T2,ADDSW0
JUMPGE P1,HIASIF ;SWPTAB FULL IF P1 POSITIVE
PUSHJ P,SAVR## ;NEED TO USE R FOR SECTION
IFE FTXMON,<
SETZ R, ;IF SECTION ZERO MACHINE, SATS LIVE IN SEC 0
>
IFN FTXMON,<
LDB R,UNYSNS## ;ASSUME THERE'S ALREADY A TABLE THERE
>
SKIPGE T1,UNIPTR##(U) ;ALREADY A SWAPPING SAT?
JRST ADDSW1 ;YES, USE IT
LDB T2,UNYK4S ;AMOUNT OF SWAP SPACE
JUMPE T2,HIANSS ;CAN'T SWAP IF NO SPACE
LSH T2,K2PLSH## ;CONVERT TO P
IDIVI T2,^D36 ;COMPUTE NUMBER OF WORDS
AOJ T2, ;ALWAYS LEAVE A ZERO
MOVN T1,T2 ;LEFT HALF OF AOBJN POINTER
HRLM T1,UNIPTR##(U) ;SET IT
IFN FTXMON,<
MOVEI R,(MS.SAT) ;ASSUME GETTING IT IN SECTION 2
PUSHJ P,GFWNZ2## ;TRY SECTION 2 FIRST
SKIPA ;TRY SECTION 0 OTHERWISE
JRST ADDSWA ;GOT IT
SETZ R, ;GETTING IN SECTION 0
HLRE T2,UNIPTR##(U) ;RESTORE SIZE
MOVNS T2
>
PUSHJ P,GETWDS## ;TRY SECTION ZERO
JRST [SETZM UNIPTR##(U)
JRST HIANSS ] ;CAN'T GET SPACE
ADDSWA: HRRM T1,UNIPTR##(U) ;SET THE OTHER HALF
IFN FTXMON,<
DPB R,UNYSNS## ;SAVE IT
>
MOVE T1,UNIPTR##(U) ;GET CURRENT POINTER
ADDSW1:
IFE FTXMON,<
SETZ R, ;NO RELOCATION
HLRE T2,T1 ;T2 = -LENGTH OF SAT
HRLI T1,1(T1)
MOVNS T2 ;POINT T2 AT TOP OF SWAP SAT
ADDI T2,-1(T1)
SETZM (T1) ;INITIALIZE SWAPPING SAT TO ZEROES
MOVSS T1 ; (WE LOSE BAT BLOCK INFO THIS WAY
BLT T1,(T2) ; BUT SUCH IS LIFE)
MOVE T1,UNIPTR##(U) ;GET POINTER
MOVSI T3,400000 ;MAKE LOG BLOCK 0 UNAVAIL
IORM T3,(T1)
>
IFN FTXMON,<
MOVSS R ;ADDRESS OF THERE START OF THE SECTION
HLRE T1,UNIPTR##(U) ;- LENGTH OF SAT
MOVNS T1 ;POSITIVE LENGTH
SOS T1 ;ONE WORD WILL BE ZEROED BY HAND
HRRZ T2,UNIPTR##(U) ;RELATIVE ADDRESS OF SAT WITHIN SECTION
HLL T2,R ;ADDRESS OF THE SAT
MOVE T4,T2 ;SAVE IT FOR LATER
SETZM (T2) ;ZERO FIRST WORD
MOVE T3,T2
AOS T3 ;SECOND WORD OF THE SAT
SKIPE T1 ;SKIP IF SAT IS ONLY 1 WORD LONG
EXTEND T1,[XBLT] ;ZERO THE ENTIRE SAT
MOVSI T1,400000 ;MAKE LOGICAL BLOCK ZERO UNAVAILABLE
IORM T1,(T4)
MOVE T1,UNIPTR##(U)
>
LDB T3,UNYK4S## ;AMOUNT OF SWAPPING SPACE
LSH T3,K2PLSH##
IDIVI T3,^D36 ;GET NUMBER OF 0'S IN LAST WORD OF SAT
SETO T3,
MOVNS T4 ;MAKE BLOCKS PAST TOP OF SWAP SPACE UNAVAILABLE
LSH T3,-1(T4)
IORM T3,(T2)
PUSH P,T1
TDZA P2,P2 ;CLEAR COUNT
CHKCYL: PUSHJ P,SETSST ;SET THE BIT IN THE TABLES
CKCY1: LDB T3,UNYBPY## ;GET BLOCKS/CYLINDER
ADD P2,T3 ;STEP TO NEXT CYLINDER
CAMLE P2,UNIBPU(U) ;OVER THE TOP OF THE DISK?
JRST CKCY2 ;YES
MOVE T2,P2 ;NO, MAKE TEMPORARY COPY OF BLOCK NUMBER
SUB T2,UNISLB(U) ;RELATIVE BLOCK IN SWAPPING SPACE
JUMPL T2,CKCY1
IDIVI T2,SWBKPP## ;CONVERT TO PAGES
JUMPE T3,CKCY1 ;ON AN EVEN BOUNDARY, DON'T DO ANYTHING
MOVE T1,P2 ;ELSE MARK IT IN USE
JRST CHKCYL ;DO SO AND LOOP BACK FOR MORE
CKCY2: POP P,T1
PUSHJ P,SATCN## ;COUNT "0" BITS = K
ADDM T2,VIRTAL## ;ADD TO SYSTEM TOTAL
ADDM T2,K4SWAP## ;SO SYSDPY KNOWS
MOVEM T2,UNIFKS##(U) ;AND TO UNIT
HRRZM U,SWPTAB##(P1) ;INSERT UNIT IN SWPTAB
MOVEI P3,SWPUNI##-UNISWP## ;POINT AT PREDECESSOR
LDB P2,UNYCFS## ;GET NEW UNIT'S CLASS FOR SWAPPING
ADDSW2: MOVE P1,P3 ;SAVE CURRENT UNIT
HLRZ P3,UNISWP##(P1) ;GET NEXT UNIT
JUMPE P3,ADDSW3 ;IF END OF CHAIN, LINK IN AT END
MOVE T1,UNICFS##(P3) ;GET UNIT CLASS WORD
LDB T1,UNZCFS## ;GET SWAPPING CLASS FROM T1
CAMG T1,P2 ;END OF CLASS REGION?
JRST ADDSW2 ;NO
ADDSW3: HRLM P3,UNISWP##(U) ;LINK UDB INTO UNISWP CHAIN AT RIGHT POINT
HRLM U,UNISWP##(P1) ;LINK IN THE NEW UDB
PUSHJ P,ASLBLD## ;REBUILD THE PRESERVED ASL
JFCL ;BOOTSTRAP NOT AVAILABLE
JRST CPOPJ1## ;TAKE THE GOOD RETURN
;ROUTINE (SIMILAR, BUT NOT QUITE) TO ONE IN ONCMOD)
SETSST: PUSHJ P,SAVE4## ;SAVE ACS
SUB T1,UNISLB##(U) ;CONVERT TO RELATIVE BLOCK IN SWAPPING SPACE
JUMPL T1,CPOPJ## ;NOT THERE??
LDB P3,UNYK4S## ;NUMBER OF PAGES FOR SWAPPING
JUMPE P3,CPOPJ## ;IF NONE
MOVE T2,P3 ;COPY TO T2
LSH T2,BLKSPK## ;CONVERT TO BLOCKS
CAML T1,T2 ;OFF THE END OF THE SWAP SPACE?
POPJ P, ;YES,RETURN
MOVEI P1,SWBKPP## ;BLOCKS PER PAGE
SETZ P2, ;GROUP #0 REPRESENTED BY FIRST BIT
SUBI P3,1 ;MAKE GROUP NUMBER
IFN FTXMON,<
LDB P4,UNYSNS##
HRL P4,UNIPTR##(U)
MOVSS P4
>
IFE FTXMON,<
HRRZ P4,UNIPTR##(U) ;IF NO KLP
>
SUBI P4,1 ;MAKE IOWD POINTER
PUSHJ P,CHKBIT ;GENERATE MASK
IORM T4,(T1) ;SET THE BIT (WASN'T SET)
POPJ P,
;SUBROUTINE TO CHECK IF A BIT IS SET IN A BLOCK IN WHICH EACH BIT REPRESENTS A GROUP OF BLOCKS
;ARGS P1=# OF BLOCKS REPRESENTED BY 1 BIT
; P2=GROUP NUMBER REPRESENTED BY FIRST BIT
; P3=GROUP NUMBER REPRESENTED BY BEST ACTUAL DATA BIT
; P4=IOWD PTR TO BLOCK
; T1=BLOCK NUMBER
;RETURN POPJ IF NOT SET
;SKIP IF SET
CHKBIT::IDIV T1,P1 ;T1=GROUP #
SUB T1,P2 ;T1=RELATIVE GROUP # IN THIS BLOCK
IDIVI T1,^D36 ;T1=INDEX IN BLOCK OF WORD CONTAINING LIST
MOVNS T2 ;T2=BITS TO SHIFT RIGHT
MOVSI T4,400000 ;SET LEFTMOST BIT
LSH T4,(T2) ;POSITION BIT
ADD T1,P4 ;T1=ADDR-1 OF WORD CONTAINING BIT
TDNN T4,1(T1) ;SKIP IF BIT SET
AOJA T1,CPOPJ## ;NO, POPJ, RETURN, POINT T1 AT WORD
AOJA T1,CPOPJ1## ;YES SKIP RETURN
NOWUP:: PUSHJ P,DWNKON ;GET KONTROLLER, 1ST UNIT
JRST HIANSK ;NO SUCH KONTROLLER
MOVSI T3,UNPNNA## ;WAS CHAN/KON/UNIT TAKEN DOWN?
TDNN T3,UNIUST##(U)
JRST HIAARP ;CONTROLLER WASNT DOWN
NOWUP1: PUSHJ P,NXDWN ;GET 1ST OR NEXT UNIT ON CHAN
JRST NOWUP2 ;DONE
JFCL
ANDCAM T3,UNIUST##(U) ;CLEAR UNPNNA FROM UNIT
IFN FTMDA,<
SETZM UNILTM##(U) ;CLEAR LOCK
> ;END IFN FTMDA
JRST NOWUP1 ;AND TEST NEXT
NOWUP2:
IFN FTKL10,<
PUSHJ P,GETWD1## ;GET LOC OF IOWD BLOCK
SETZM 3(T1) ;TERMINATE IT
PUSHJ P,RTNIOW## ;AND RETURN IT TO SYSTEM
>
JRST CPOPJ1## ;GOOD RETURN
;RETURNS U=BIT 0 + 1ST UNIT ON KONTROLLER, T4=RH(U)
DWNKON: PUSHJ P,GETWDU## ;GET KONTROLLER NAME
MOVSI T2,-1 ;KONS ARE 3 LETTERS
SKIPA T3,LOCSRU
DWNKO1: MOVEI T3,SRUNX
PUSHJ P,(T3) ;FIND A MATCHING TNIT
POPJ P, ;NO MATCH
JRST DWNKO1 ;LOGICAL MATCH
HRRZ T4,U ;SAVE 1ST UNIT ON KONTROLLER
TLO U,400000 ;INDICATE 1ST TIME
JRST CPOPJ1## ;AND RETURN
;RETURNS NON-SKIP IF NO MORE UNITS, CPOPJ1 IF NOT IN ASL
;RETURNS CPOPJ2 IF UNIT IS IN ASL
;RESPECTS T3
NXDWN: TLZE U,400000 ;1ST TIME?
JRST NXDWN1 ;YES
HLRZ U,UNICHN##(U) ;NO, GET NEXT UNIT
CAMN U,T4 ;BACK WHERE WE STARTED?
POPJ P, ;YES, DONE
NXDWN1: SKIPGE UNIPTR##(U) ;SWAPPING UNIT?
AOS (P) ;YES, CPOPJ2
JRST CPOPJ1## ;SKIP OR DOUBLE-SKIP RETURN
SUBTTL F.S. UUO ERROR RETURN CODES
;STRUUO & GOBSTR ERROR CODES
XP .ERILF,0 ;ILLEGAL FUNCTION CODE
XP .ERSNF,1 ;1 OR MORE FILE STRUCTURES NOT FOUND
XP .ERSSA,2 ;1 OR MORE FILE STRUCTURES SINGLE ACCESS ONLY
XP .ERILE,3 ;1 OR MORE ILLEGAL ENTRIES IN ARG. LIST
XP .ERTME,4 ;TOO MANY ENTRIES IN SEARCH LIST
XP .ERUNA,5 ;1 OR MORE UNITS NOT AVAILABLE
XP .ERPPN,6 ;JOB # , PP # DO NOT MATCH
XP .ERMCN,7 ;MOUNT COUNT NOT 0
XP .ERNPV,10 ;NOT PRIVILEGED USER
XP .ERFSA,11 ;F.S. ALREADY EXISTS
XP .ERILL,12 ;ILLEGAL ARG. LIST LENGTH (LH UUO AC)
XP .ERUNC,13 ;UNABLE TO COMPLETE THE FUNCTION
XP .ERNFS,14 ;SYSTEM FULL OF FILE STRUCTURES
XP .ERNCS,15 ;NOT ENOUGH FREE CORE FOR DATA BLOCK
XP .ERUNF,16 ;ILLEGAL UNIT
XP .ERRSL,17 ;FILE STRUCTURE REPEATED IN SEARCH LIST DEFINITION
XP .ERASL,20 ;UNITS IN THIS FILE STRUCTURE ARE IN THE ACTIVE SWAPPING LIST
XP .ERISN,21 ;ILLEGAL STRUCTURE NAME
SUBTTL SYSSTR UUO
;UUO TO RETURN NAME OF NEXT FILE STRUCTURE IN SYSTEM
;NOTE THAT ACCUMULATOR J AND CONTAINS THE JOB NUMBER OF THE JOB
; EXECUTING THE UUO
SYSTUU::JSP T4,STLOCK ;INTERLOCK
JUMPE T1,SYSTU1 ;JUMP IF 1ST STR DESIRED
PUSHJ P,SRSTR ;SEE IF ARG IS AN STR NAME (ARG IN T1)
POPJ P, ;NO, ERROR RETURN
MOVE T1,T4 ;AOBJN PTR TO T1
JRST SYSTU2 ;YES
SYSTU1: MOVE T1,STRAOB## ;START WITH 1ST FSN.
SKIPG T3,TABSTR##(T1) ;SKIP IF THIS IS A REAL STR
SYSTU2: AOBJN T1,.-1 ;NO, TRY NEXT NUM
JUMPGE T1,RTZER1## ;RETURN 0 IF END OF SEARCH LIST
IFN FTPSTR,<
PUSHJ P,PVSTR ;A PRIVATE STR?
JRST SYSTU2 ;YES, SKIP IT
>
MOVE T1,STRNAM##(T3) ;GET NAME OF STR
JRST STOTC1##
SUBTTL SYSPHY UUO
;CALLI AC,51
;UUO TO RETURN NAME OF NEXT PHYS.DEV. NAME IN SYSTEM
; CALLING SEQUENCE IS SIMILAR TO SYSSTR UUO
SYSPHY::HLRZ U,SYSUNI## ;U=ADDRESS 1ST UNIT D.B.
SETO T2, ;INDICATE IN SYSUNI CHAIN
JUMPE T1,SYSPH4 ;IF USER AC=0: RETURN 1ST UNIT
SYSPH2: CAMN T1,UNINAM##(U) ;THIS UNIT PHYS.NAME = ARGUMENT?
JRST SYSPH3 ;YES-GO RETURN NEXT PHYS.NAME
HLRZ U,UNISYS##(U) ;NO--GET NEXT UNIT
JUMPN U,SYSPH2 ;IF THIS IS LAST UNIT:
AOJN T2,CPOPJ## ; GIVE ERROR RETURN IF AT END OF SYSDET CHAIN
HLRZ U,SYSDET## ;GET ADDRESS OF FIRST DETACHED UNIT D.B.
JUMPN U,SYSPH2 ;CHECK THEM IF THERE ARE ANY DETACHED UNITS
POPJ P, ;NO DETACHED UNITS, LAST UNIT, ERROR RETURN
SYSPH3: SETZ T1, ;RETURN 0 IN CASE IT WAS LAST UNIT
HLRZ U,UNISYS##(U) ;GET NEXT UNIT D.B.
JUMPN U,SYSPH4 ;RETURN PHYS NAME IF NOT LAST UNIT
AOJN T2,STOTC1## ;IF THAT WAS LAST UNIT: RETURN 0
HLRZ U,SYSDET## ;GET ADDRESS OF FIRST DETACHED UNIT D.B.
JUMPE U,STOTC1## ;IF THAT WAS LAST UNIT: RETURN 0
SYSPH4: MOVE T1,UNINAM##(U) ;OTHERWISE RETURN PHYS.NAME
JRST STOTC1##
SUBTTL GOBSTR UUO
; GENERALIZED JOBSTR UUO - CALLI AC,66
;ERROR RETURN CODES:
ERCODE GERIFS,.ERILE ;1ST ARG. NOT VALID (-1 OR F.S. NAME IN JOBS SRCH LIST)
ERCODE GERPPN,.ERPPN ;JOB# (1ST ARG) NO GOOD OR DOESNT MATCH PPN (2ND ARG)
ERCODE GERILL,.ERILL ;ILLEGAL ARG.LIST LENGTH (LH OF UUO AC)
; ALSO .ERNPV ;(SUBROUT PRIVJ) NOT PRIVILEGED JOB
GOBSTR::PUSHJ P,SAVE3##
HRRM T1,M ;RH UUO=ADDR. USERS ARG. LIST
HLRZ P1,T1 ;P1=LENGTH OF ARG. LIST
SKIPN P1 ;CONVERT 0 TO 3
MOVEI P1,3
CAIG P1,5 ;LENGTH LESS THAN 5?
CAIGE P1,3 ;LENGTH 3 OR GREATER?
JRST GERILL ;NO--ERROR RETURN
SOS M ;SO GETWD1 IN CKJPPN WILL WORK
PUSHJ P,CKJPPN ;JOB # MATCH PPN?
JRST GERPPN ;NO--ERROR RETURN
JUMPE F,GOBST1 ;JUMP IF SYS.SRC.LST
MOVE T4,JBTPRV##(J) ; IF DOESN'T HAVE PRIVILEGES
TLNE T4,PVSPYA!PVSPYM
JRST GOBST1
CAME T1,JBTPPN##(J) ; OR IF PPN NOT SAME AS THIS JOBS PPN
JSP T4,PRIVJ ; THEN THIS JOB MUST BE PRIV
GOBST1: AOS M ;BECAUSE JOBSTR CODE DOES GETWDU
SUBI P1,2 ;CORRECT LENGTH OF ARGUMENT TEST FOR JOBSTR
MOVE J,F ;SAVE F SINCE STLOCK ZEROES IT
PUSHJ P,JOBST0 ;PUSHJ TO JOBSTR CODE SO I
JRST GERIFS ; CAN HANDLE MY OWN ERROR RETURN
JRST CPOPJ1## ;GOOD RETURN--PASS IT ON
;UUO TO RETURN NEXT STR IN JOB'S OWN SEARCH LIST
JOPSWL==400000 ;BIT FOR SOFTWARE WRITE LOCK TO RETURN TO USER
JOPNCR==200000 ;BIT FOR NO CREATE TO RETURN TO USER
;SO GOBSTR CAN USE THIS SAME CODE:
; F HOLDS # OF JOB WHOSE SEARCH LIST IS TO BE SEARCHED (0 IS SYS SL)
; J HOLDS # OF JOB EXECUTING THE UUO
; P1=# OF ARGUMENTS
JOBSTR::PUSHJ P,SAVE3##
HRRM T1,M ;ADDR OF USER'S ARGUMENT LIST
HLRZ P1,T1 ;P1=NUMBER OF ARGS DESIRED
SKIPN P1
MOVEI P1,1 ;CONVERT 0 TO 1
CAILE P1,3 ;IS THE # OF ARGS LEGAL (0-3)?
JRST GERILL ;NO
;HERE FROM GOBSTR
JOBST0: JSP T4,STLOCK ;INTERLOCK
;HERE WITH J=JOBNUM.OF SL. TO GET (OR 0 FOR SYS.SL.)
;GET CALLER'S 1ST ARG.AND DISPATCH (FS.NAME, 0 (FENCE), OR -1 (BEGINNING)
MOVE F,J ;GETWDU MODIFIES J
PUSHJ P,GETWDU## ;T1=ARG.
MOVE J,F
PUSHJ P,SLPTR ;P2=SL.PTR.
MOVE P2,EMTSRC## ;USE EMPTY SL. IF JOB HAS NONE
AOJE T1,JOBSR4 ;JUMP IF -1
SOJE T1,[ ;JUMP IF 0
MOVEI T1,.FSFNC ;LOOK FOR FENCE
JRST JOBSR2
]
PUSHJ P,SRSTR ;T3=STR.DB. ADDR. FOR NAMED FS.
JRST GERIFS ;NOSKIP ERROR IF NO SUCH FS.NAME
HRRZ T1,STRFSN##(T3) ;T1=CORRESPONDING FSN.
JOBSR2: ;HERE WITH FSN. (OR FENCE) TO LOOK FOR IN T1
PUSHJ P,SLFND
JRST GERIFS ;NOSKIP ERROR IF NOT ON LIST
JOBSR4: ;HERE WITH P2 POINTING TO DESIRED FSN.
PUSHJ P,SLIGT
JRST [ ;END OF LIST--RETURN -1
SETO T1,
SETZ P3,
JRST JOBSR6
]
CAIN T1,.FSFNC ;RETURN 0 IF FENCE
JRST [
SETZB T1,P3
JRST JOBSR6
]
MOVE T1,TABSTR##(T1) ;GET FS.NAME FOR THIS FSN.
MOVE T1,STRNAM##(T1)
PUSHJ P,SLGTB ;GET FS.BITS AND TRANSLATE FOR UUO ARG
SETZ P3,
TRNE T2,FS.WLK
TLO P3,JOPSWL
TRNE T2,FS.NCR
TLO P3,JOPNCR
JOBSR6: ;HERE WITH T1=FS.NAME (OR 0 OR -1), P3=FS.BITS
PUSHJ P,PUTWDU##
SOJE P1,CPOPJ1## ;SKIP RETURN IF NO MORE ARGS DESIRED
MOVEI T1,0 ;ZERO FOR PPN WORD FOR NOW ***
PUSHJ P,PUTWD1##
SOJE P1,CPOPJ1## ;SKIP RETURN IF NO MORE ARGS DESIRED
MOVE T1,P3 ;STORE STATUS BITS
PUSHJ P,PUTWD1##
JRST CPOPJ1## ;SKIP RETURN
SUBTTL STRUUO UUO
;UUO TO PERFORM VARIOUS FUNCTIONS FOR FILE STRUCTURES
;NOTE THAT ACCUMULATOR J AND CONTAINS THE JOB NUMBER OF THE JOB
; EXECUTING THE UUO
;ERROR CODES
ERCODE ILLERR,.ERILL ;ILLEGAL ARG.LIST LENGTH (LH UUO AC)
ERCODE NPVERR,.ERNPV ;NOT PRIVILEGED PROGRAM
ERCODE PPNERR,.ERPPN ;JOB #--PPN MISMATCH
ERCODE SNXERR,.ERSNF ;F.S. NOT FOUND (NONEXISTANT)
ERCODE TMEERR,.ERTME ;TOO MANY ENTRIES (FILE STRUCTURES)
ERCODE RSLERR,.ERRSL ;REPEATED F.S. IN ARG LIST
ERCODE ILFERR,.ERILF ;ILLEGAL FUNCTION
ERCODE NFSERR,.ERNFS ;NO ROOM FOR THIS F.S. (NO MORE F.S. #S)
ERCODE UNFERR,.ERUNF ;NO SUCH UNIT
ERCODE NCSERR,.ERNCS ;NOT ENOUGH FREE CORE
ERCODE FSAERR,.ERFSA ;F.S.ALREADY EXISTS
ERCODE UNAERR,.ERUNA ;UNIT NOT AVAILABLE
ERCODE MCNERR,.ERMCN ;MOUNT COUNT NOT ZERO
ERCODE SSAERR,.ERSSA ;A F.S. IS SING. ACCESS FOR ANOTHER
ERCODE ASLERR,.ERASL ;F.S. CONTAINS UNITS STILL IN ASL
ERCODE ISNERR,.ERISN ;ILLEGAL STRUCTURE NAME
STRUUO::PUSHJ P,SAVE4## ;SAVE ALL 4 GLOBAL ACCUMULATORS
MOVE P4,T1 ;SAVE T1 IN P4
HRRM T1,M ;ADDRESS OF ARGUMENT LIST
PUSHJ P,GETWDU## ;GET FIRST ARGUMENT = FUNCTION
JUMPL T1,ILFERR ;ILLEGAL IF NEGATIVE
CAIL T1,STRFNN ;SEE IF LEGAL FUNCTION
JRST ILFERR ;WELL, NO
JRST @STRFNC(T1)
ETSSTR==ILFERR
STRFNC: XWD ZERO5,SRCSTR ;(0) DEFINE NEW SEARCH LIST (UNPRIVILEGED)
XWD ZERO5,DSLSTR ;(1) DEFINE NEW SEARCH LIST (PRIVILEGED)
XWD ZERO5,DEFSTR ;(2) DEFINE NEW FILE STRUCTURE
XWD ZERO5,RDFSTR ;(3) REDEFINE FILE STRUCTURE (CHANGE BITS)
XWD ZERO5,LOKSTR ;(4) LOCK OUT NEW INIT'S, ENTER'S ,ETC.
XWD ZERO5,REMSTR ;(5) REMOVE FILE STRUCTURE FROM SYSTEM
XWD ZERO5,ULKSTR ;(6) TEST/SET UFD INTERLOCK FOR LOGIN, LOGOUT, ETC
XWD ZERO5,UCLSTR ;(7) CLEAR UFD INTERLOCK
XWD ZERO5,ETSSTR ;(10) ERROR TEST UUO (SIMULATE ERRORS) .FSETS
XWD ZERO5,RSLSTR ;(11) CHANGE NOCREATE AND WRITE LOCK FOR 1 STR
IFN FTMDA,<
XWD ZERO5,CLKSTR ;(12) CLEAR LOCK FOR A STRUCTURE
> ;IFN FTMDA
STRFNN==.-STRFNC
KILJSL::PUSHJ P,SAVE4## ;STRUUO CORE CLDBBERS THE P ALS
JSP T4,STLOCK ;NEED THE FILSER INTERLOCK
SETZ P3, ;NO UUO ARGUMENTS
MOVE F,.CPJOB## ;JSL FOR RUNNING JOB
PUSHJ P,SLKILL ;KILL DUR JSL
POPJ P, ;IGNORE ERRORS
POPJ P, ;AND RETURN TO JOBKL
SUBTTL STRUUO UUO - DEFINE NEW SEARCH LIST
;FUNCTIONS TO DECLARE NEW SEARCH LISTS
;BITS IN 3RD ARG. OF EACH UNI TRIPLET
SETSWL==400000 ;1=SOFTWARE WRITE-LOCKED BIT
SETNCR==200000 ;1=NO-CREATE BIT
;FOR THIS JOB (UNPRIVILEGED)
SRCSTR: JSP T4,STLOCK ;GET FF RESOURCE
MOVE F,J ;JOBS OWN SEARCH LIST
HLRZ P3,P4 ;P3=ARG.LIST LENGTH - 1
CAILE P3,3*.SLMXJ##+1 ;TOO LONG?
JRST ILLERR ;YES LOSE
SOJA P3,SLSTRR
;FOR ANY JOB (PRIVILEGED)
;BITS IN 5TH ARGUMENT (.FSDSL ONLY)
SETDEL==1 ;DELETE (FORGET) MISSING F.S'S FROM NEW S.L.
; OTHERWISE MOVE TO OTHER SIDE OF FENCE (REMEMBER)
DSLSTR: JSP T4,STLOCK ;GET FF RESOURCE
PUSHJ P,CKJPPN ;JOB # MATCH PPN?
JRST PPNERR ;NO--ERROR RETURN
CAME F,J ;IF NOT FOR THIS JOB
JSP T4,PRIVJ ; THEN THIS JOB MUST BE PRIV
HLRZ P3,P4 ;P3=ARG.LIST LENGTH - 4
SUBI P3,4
PUSHJ P,GETWD1## ;CK FOR 'DELETE' BIT IN FLAGS
TRNE T1,SETDEL ;IF WANTS TO DELETE F.S.'S
JSP T4,PRIVJ ; THEN MUST BE PRIV
SKIPE F ;IF SYS.SRC.LST: ALWAYS DELETE
TRNE T1,SETDEL
;J=# OF JOB EXECUTING THE UUO
;RH(F)=# OF JOB WHOSE SEARCH LIST IS TO BE DEFINED (0=SYS.SRC.LST.)
;P3=ARG.LIST LENGTH (EXCLUDING INITIAL STUFF LIKE FUNCTION NO.)
;FALL OR SKIP INTO HERE FROM DSLSTR CODE
SLKILL: TLOA F,400000 ;HERE TO 'FORGET' MISSING F.S'S
SLSTRR: TLZ F,400000 ;HERE TO 'REMEMBER' MISSING F.S'S
;BUILD CALLERS SL. IN A TEMPORARY SL.
;PUSHJ TO SLSTR SO CAN GET CONTROL BACK TO RETURN TEMP.SL.
IFN FTPSTR,<
PUSHJ P,PRVJO ;JOB PRIV'ED
TLZA F,200000 ;NO, REMEMBER THAT
TLO F,200000 ;YES REMEMBER THAT
>
MOVEI T2,.SLMXJ ;T2=HOW BIG SL.MUST BE
PUSHJ P,SLPRT
JRST NCSERR ;NOT ENOUGH FREE CORE ERROR
PUSH P,P2
PUSHJ P,SLSTR
SKIPA ;PROPAGATE SKIP/NOSKIP
AOS -1(P)
POP P,P2
PUSHJ P,SLGVT ;RETURN TEMP.SL.
TRNN F,-1 ;JOB ZERO?
PUSHJ P,SSLBLD## ;REBUILD THE PRESERVED SSL
JFCL ;BOOTSTRAP NOT AVAILABLE
POPJ P, ;RETURN
SLSTR: ;HERE WITH P2=PTR.TO TMP.SL.
MOVE P1,P2
MOVE P4,J ;GET PTR. TO OLD SL.
HRRZ J,F
PUSHJ P,SLPTR
JRST [
JUMPE P2,PPNERR ;ERROR IF NO SUCH SL.
PUSHJ P,SLINI ;IF NULL SL. (EG. LOGIN CALLING)
JRST .+1 ; SET IT EMPTY
]
MOVE J,P4
MOVE P4,P2
;IN THE FOLLOWING
; P1=PTR.TO BEG.OF TEMP.SL (NOT INCREMENTED)
; P2=PTR.TO NEXT POSITION ON TEMP.SL.(INCREMENTED)
; P3=LENGTH OF ARGUMENT LIST
; P4=POINTER TO OLD S.L.
; S =FENCE COUNTER
SETO S,
MOVE P2,P1
;IF NO ARGS, WE'RE FINISHED
JUMPLE P3,SLSR4
;HERE TO GET EACH UUO ARGUMENT TRIPLET
SLSR0: PUSHJ P,GETWD1##
JUMPE T1,[ ;JUMP IF FENCE (0) SPECIFIED
AOJG S,RSLERR ;2 FENCES IS AN ERROR
MOVEI T1,.FSFNC
SETZ T2,
ADDI M,2 ;IGNORE 2ND,3RD ARGS
JRST SLSR2
]
;HERE WITH FS.NAME IN T1
PUSHJ P,SRSTR ;GET STR.DB. FOR THIS FS.
JRST SNXERR ;NO SUCH FS.
MOVE T4,STRJOB##(T3) ;SING.ACCESS FOR SOMEONE ELSE?
CAIE T4,(F)
JUMPG T4,SSAERR ;YES
HRRZ T1,STRFSN##(T3) ;T1=FSN.
MOVE T2,P2 ;IS FSN. ALREADY ON SL.?
MOVE P2,P1
PUSHJ P,SLFND
SKIPA P2,T2 ;NO
JRST RSLERR ;YES-ERROR
IFN FTPSTR,<
MOVE T4,STRPVS##(T3) ;WORD CONTAINING PRIVATE F.S. BIT
TRNE T4,STPPVS## ;IS THIS A PUBLIC F.S.?
TLNE F,200000 ; OR DOING THIS FOR A PRIVILEGED JOB?
JRST SLSR1 ;YES, EVERYTHING OK
MOVE P2,P4 ;POINTER TO OLD S.L.
PUSHJ P,SLFND ;THIS F.S. ALREADY IN THE JOB'S S.L.?
JRST NPVERR ;NO, ILLEGAL SINCE NOT PRIVILEGED
MOVE P2,T2 ;RESTORE POINTER TO TEMP. S.L.
SLSR1:>
;GET FS.STATUS BITS AND TRANSLATE FOR SL.
PUSH P,T1
AOS M
PUSHJ P,GETWD1##
SETZ T2,
TLNE T1,SETSWL
TRO T2,FS.WLK
TLNE T1,SETNCR
TRO T2,FS.NCR
POP P,T1
;HERE WITH T1=FSN., T2=BITS, P2=PTR.
SLSR2: PUSHJ P,SLAPD ;APPEND TO THE LIST
JRST TMEERR ;RAN OUT OF ROOM ERROR
SUBI P3,3 ;COUNT UUO ARGS
JUMPG P3,SLSR0 ;DO IT AGAIN IF MORE ARGS
;HERE WHEN FINISHED WITH ALL UUO ARGS
;MAKE SURE THERE IS A FENCE
AOJG S,SLSR3 ;JUMP IF CALLER SUPPLIED FENCE
MOVEI T1,.FSFNC ;ELSE PUT ONE AT END
SETZ T2,
PUSHJ P,SLAPD
JRST TMEERR ;NO ROOM
SLSR3:
SLSR4: ;HERE WITH P1=BEG. OF NEW SL., P2=END OF NEW SL.
;FOR EVERY FS. ON OLD SL. BUT NOT ON NEW SL.:
; EITHER APPEND IT TO NEW SL. (PASSIVE LIST), OR DECREMENT
; ITS MOUNT COUNT, DEPENDING ON SWITCH F.
MOVE P3,P4 ;P3=BEG. OLD S.L.
IFN FTMDA,<
FRAME (SLCHNG) ;ALLOCATE A FLAG
SETZM SLCHNG ;INITIALLY, NO SL CHANGES
>;END IFN FTMDA
SLSR5: ;HERE WTO GET EACH FS. FROM OLD SL.
;P1=BEG.NEW SL., P3=BEG.OLD SL., P4=NEXT FSN. ON OLD SL.
MOVE P2,P4
PUSHJ P,SLIGT
JRST SLSR7 ;END OF OLD SL.
MOVE P4,P2
MOVE P2,P1 ;ON NEW SL.?
PUSHJ P,SLFND
SKIPA
JRST SLSR5 ;YES
JUMPL F,SLSR6 ;NO--JUMP IF DELETING FS'S
SETZ T2, ;ELSE APPEND TO END OF NEW SL.
PUSHJ P,SLAPD
JRST TMEERR
JRST SLSR5
;DECREMENT MOUNT COUNT. IF GOES TO 0, SET STRJOB =0.
SLSR6:
IFN FTMDA,<
SETOM SLCHNG ;NOTE CHANGE IN SL
>;END IFN FTMDA
MOVE T3,TABSTR##(T1)
SOSGE T2,STRMNT##(T3)
STOPCD .+1,DEBUG,MCN, ;++MOUNT COUNT NEGATIVE
JUMPN T2,SLSR5
SETZM STRJOB##(T3)
JRST SLSR5
SLSR7: ;HERE WITH P1=BEG.NEW SL., P3=BEG.OLD SL.
;FOR EVERY FS. ON NEW SL. BUT NOT ON OLD SL.:
; INCREMENT ITS MOUNT COUNT.
MOVE P4,P1
SLSR8: ;HERE TO GET NEXT FS. ON NEW SL.
;P1=BEG.NEW SL., P3=BEG.OLD SL., P4=NEXT NEW SL.
MOVE P2,P4
PUSHJ P,SLIGT
JRST SLSR9 ;FINISHED
MOVE P4,P2 ;IS IT ON OLD SL.?
MOVE P2,P3
PUSHJ P,SLFND
SKIPA
JRST SLSR8 ;YES
;HERE IF NOT ON OLD SL. INCREMENT MOUNT COUNT.
;IF NOT A SINGLE ACCESS FS., THEN SET STRJOB = -1,,JOB OR 0 DEPENDING
;ON WHETHER THIS IS 1ST OR SUBSEQUENT MOUNTER.
MOVE T3,TABSTR##(T1)
SKIPLE STRJOB##(T3)
JRST SLSR81
SETZM STRJOB##(T3)
SKIPN STRMNT##(T3)
HRROM F,STRJOB##(T3) ;-1,,JOB TO SIGNIFY ONLY USER
SLSR81: AOS STRMNT##(T3)
IFN FTMDA,<
SETOM SLCHNG ;NOTE CHANGE IN SL
>;END IFN FTMDA
JRST SLSR8 ;LOOP FOR NEXT FS.
SLSR9: ;HERE WHEN FINISHED FIXING THINGS UP. REPLACE OLD SL. WITH NEW.
;P1=BEG.NEW SL., P3=BEG.OLD SL.
MOVE P2,P1
PUSHJ P,SLCHK ;MAKE SURE NUMBER OF F.S DOES NOT
JRST TMEERR ;EXCEED MAXIMUM (.SLMXJ)
PUSHJ P,SLBLT
JRST TMEERR
IFN FTMDA,<
SKIPE SLCHNG ;DID THE LIST CHANGE IN CONTENT?
PUSHJ P,SLNOTF ;YES, TELL MDA OF CHANGE
JFCL ;IGNORE ERROR
>;END IFN FTMDA
PJRST ADJPT## ;FIX AT'S AND RETURN
IFN FTMDA,<
;THIS ROUTINE SENDS THE NEW SEARCH LIST TO MDA
;CALL
; P1 NEWSL PTR
;RETURNS CPOPJ NOT SENT
; CPOPJ1 DONE
SLNOTF: JUMPE J,CPOPJ1## ;DON'T NOTIFY IF SSL CHANGES
MOVE T1,JBTPRG##(J) ;GET PROGRAM THEY ARE RUNNING
MOVE T2,JBTSTS##(J) ;GET JOB STATUS WORD
CAMN T1,LOGTXT## ;REAL BONAFIDE
TLNN T2,JACCT ; JACCT LOGIN?
SKIPA ;NO, AN IMPOSTER
POPJ P, ;YES, WAIT UNTIL THE LOGIN UUO DOES THIS
SLNMSG::SKIPE %SIMDA## ;IS MDA RUNNING?
CAMN J,TLPJOB## ; OR IS THIS MDA'S COHORT?
POPJ P, ;NO, MDA OR DONE BY MDA
PUSHJ P,SAVE4##
MOVE P2,P1 ;READ DOWN NEW SL
MOVEI T2,.SLMXJ+2 ;GET SPACE FOR THE MESSAGE
PUSHJ P,GETWDS## ;+2 FOR HEADER
POPJ P, ;OH WELL
HRRZ P3,T1 ;SAVE MSG ADRS
MOVE P1,[XWD 2,.IPCSC##] ;INITIAL LENGTH,,MSG TYPE
MOVEM P1,0(P3) ;MARK IT
MOVEM J,1(P3) ;SAY WHO'S DOING IT
HRRZI P4,2-1(P3) ;MAKE COUNT IN LH, PDL PTR
SLNOT1: PUSHJ P,SLIGT ;GET NEXT STR
JRST SLNOT2 ;NO MORE
CAIN T1,.FSFNC ;FENCE?
JRST SLNOT1 ;YES, SKIP IT
MOVE T1,TABSTR##(T1) ;GET ITS STR DATA BLOCK
MOVE T1,STRNAM##(T1) ;GET STRUCTURE NAME
PUSH P4,T1 ;PUT IN MESSAGE, COUNT IT
JRST SLNOT1 ;TRY THEM ALL!
SLNOT2: HLLZS P4 ;JUST COUNT # OF STRS
ADDM P4,0(P3) ;COUNT THE MESSAGE
MOVE T1,P3 ;AIM AT THE MESSAGE
MOVEI T2,.SLMXJ+2 ;LENGTH WE GOT
PJRST SNDMDN## ;SEND IT, RETURN SPACE
>;END IFN FTMDA
;CHANGE NO CREATE AND WRITE LOCK FOR 1 STR
RSLSTR: PUSHJ P,SLPTR ;GET S.L. INTO P2
JRST SNXERR ;SEARCH LIST IS EMPTY
PUSHJ P,GETWD1## ;GET STR NAME
PUSHJ P,SRSTR ;FIND STR
JRST SNXERR ;CAN'T
HRRZ T1,STRFSN##(T3) ;GET F.S.N.
PUSHJ P,SLFNA ;FIND IT
JRST SNXERR ;CAN'T
PUSHJ P,GETWD1## ;GET FLAGS
MOVEI T2,0 ;COPY BITS
TLNE T1,SETSWL ; ..
TRO T2,FS.WLK
TLNE T1,SETNCR
TRO T2,FS.NCR
PUSHJ P,SLGTX ;GET FSN BACK
PUSHJ P,SLPUT ;STORE NEW BITS
PUSHJ P,SLXAES ;SHOULD NOT BE DONE
JRST CPOPJ1## ;GOOD RETURN
SUBTTL STRUUO UUO - DEFINE A F.S.
;FUNCTION TO DEFINE A NEW FILE STRUCTURE
DEFAWL==400000 ;SOFTWARE WRITE LOCK FOR ALL JOBS ON THIS STR
DEFSAF==200000 ;SINGLE ACCESS STR
DEFSTR: JSP T4,PRIVJ ;PRIVILEGED JOB?
PUSHJ P,DEFINC ;MAKE SURE ALL ARGUMENTS ARE IN CORE
JSP T4,STLOCK ;GET FF RESOURCE
;GET A # FOR THIS F.S. NAME
PUSHJ P,MVWRD ;GET F.S. NAME (INTO T1)
TRNE T1,7777 ;ALLOW 4 CHARACTER NAMES
JRST ISNERR ;LOSE
PUSHJ P,SRSTR ;IS IT ALREADY DEFINED?
SKIPA
JRST FSAERR ;YES-ERROR RETURN
PUSHJ P,SRCTBS ;GET A # FOR IT (INTO P2)
JRST NFSERR ;NO MORE #S LEFT--ERROR RETURN
;BUILD PROTOTYPE STR D.B.
MOVEI T1,DIFSTR## ;SET PREDECESSOR
DEFST1: HLRZ T1,STRSYS##(T1) ;GET NEXT
JUMPE T1,DEFST2 ;GET FREE CORE IF END OF LIST
SKIPE STRNAM##(T1) ;STR BLOCK AVAILABLE?
JRST DEFST1 ;NO, TRY NEXT
JRST DEFST3 ;FOUND A FREE BLOCK, USE IT
DEFST2: MOVEI T2,STRLEN## ;GET CORE FOR STR D.B.
PUSHJ P,GETWDS##
JRST NCSERR ;NOT ENOUGH--ERROR RETURN
;NOTE--FROM HERE ON ERR RETURNS MUST 1ST CALL REMOV TO RETURN CORE ETC.
MOVE T2,SYSSTR## ;LINK STR D.B. TO OTHER STRS
HLLM T2,STRSYS##(T1)
HRLM T1,SYSSTR##
DEFST3: MOVE F,T1 ;F=ADDR. OF STR D.B.
HRLI T1,STRDB##+2 ;INIT. D.B. WITH PROTOTYPE
ADDI T1,STRUNI##
BLT T1,STRLEN##-1(F)
HRRM P2,STRFSN##(F) ;PUT F.S. # IN D.B.
;FILL WITH USER ARGUMENTS
SOS M ;MOVE USER ARGS. IN
MOVE T2,F ;BECAUSE BYTE PTRS. USE T2
MOVEI P1,FSTAB
PUSHJ P,MVARG
HRLZI T1,77 ;CLEAR INDEX AND @ FIELDS IN PTRS.
ANDCAM T1,STYCNP##(F)
ANDCAM T1,STYCKP##(F)
ANDCAM T1,STYCLP##(F)
;SETUP FOR UNIT DEFINITIONS
HRRZ P3,STRUNM##(F) ;P3=# OF UNITS
MOVEI U,DIFUNI##(F) ;SO STRUNI GETS ADDR. 1ST UNIT D.B.
;HERE FOR EVERY UNIT
;IS UNIT DEFINED AND AVAILABLE?
SE1ENT ;MUST BE IN SECTION 1 TO CHASE SAB RINGS
DEFST4: MOVE P4,U ;P4=ADDR. OF LAST UNIT D.B.
MOVEI P1,UNTAB ;GET PHYS DRIVE NAME (INTO T1)
PUSHJ P,MVWRD
SETO T2, ;DOES IT EXIST?
PUSHJ P,SRUNI
JRST UNFDEF ;NO--ERROR
JRST UNFDEF ;YES BUT IT IS LOGICAL NAME--ERROR
;----TEST FOR UNIT DOWN-----
LDB T1,UNYUST## ;IS IT IN 'NO PACK MOUNTED' STATE?
CAIE T1,UNVNPM##
JRST UNADEF ;NO--ERROR
MOVEI T1,UNVPIM## ;YES-SET STATE TO 'MOUNTED'
DPB T1,UNYUST##
;LINK THE UNIT D.B. TO OTHERS
HRLM U,UNISTR##(P4) ;LINK THIS D.B. TO PROVIOUS
HRRM F,UNISTR##(U) ;LINK IT TO STR D.B.
;MOVE IN USER VALUES
SOS M ;MOVE USER ARGS IN TO UNIT D.B.
MOVEI P1,UNTAB
PUSHJ P,MVARG ;LEAVES P2=USER PTR.WRD. TO SPT TABLE
; S =STATUS BITS
IFN FTDUAL,<
SKIPE T2,UNI2ND##(U) ;UNIT DUAL PORTED?
PUSHJ P,CPYST## ;YES, COPY INFORMATION TO OTHER PORT
>
;*****SAY NO SWAPPING FOR NOW*****
; SETZB T1,UNIFKS##(U)
; DPB T1,UNYK4S##
;*****
MOVE T1,UNIDES##(U) ;GET UNIDES
TLZ T1,UNPSTL## ;CLEAR BITS TO BE CHANGED
TLNE S,DEFAWL ;WRITE-LOCK?
TLO T1,UNPAWL##
;CREATE AN SPT TABLE (UNIDES IN T1)
LDB P1,UNYSPU## ;P1=# SATS/UNIT
CAILE P1,1 ;SET UNPMSB IF SPU.GT.1
TLO T1,UNPMSB##
MOVEM T1,UNIDES##(U) ;STORE NEW UNIDES
REPEAT 0,< ;DO THIS WITH ADDSWP NOW
SETZM UNIPTR##(U) ;INSURE NOT IN ASL
LDB T2,UNYK4S## ;ANY SWAPPING SPACE?
JUMPE T2,DEFST5 ;JUMP IF NOT
MOVEI P4,SPTFIR##+1(P1) ;GET LENGTH OF SAT
LSH T2,K2PLSH## ;DOUBLE SIZE IF SWAP PAGES
IDIVI T2,^D36 ;
AOJ T2, ;INSURE A ZERO WORD
MOVN T1,T2 ;MAKE LENGTH -VE FOR AOBJN
HRLM T1,UNIPTR##(U) ;STORE IN UDB
LSH T2,1
ADD T2,P4 ;COMPUTE # WORD IN SPT AND SAT
CAIA ;GET CORE IF NEEDED
> ;END REPEAT 0
DEFST5: MOVEI T2,SPTFIR##+1(P1) ;T2=LENGTH OF SPT TABLE
DEFST6:
IFN FTXMON,<
PUSHJ P,GFWNZ2## ;TRY SECTION 2
SKIPA ;WELL, MAYBE NOT
JRST DEFST7
MOVEI T2,SPTFIR##+1(P1);RESET LENGTH
>
PUSHJ P,GETWDS## ;GET CORE FOR IT
JRST NCSDEF ;NOT ENOUGH--ERROR RETURN
DEFST7: MOVEM T1,UNISPT##(U) ;PUT SPT ADDR. IN UNIT D.B.
SETOM UNIFKS##(U) ;NO FREE SPACE FOR SWAPPING
PUSH P,M ;SAVE M
HRRI M,-1(P2) ;POINT M TO USERS TABLE
MOVE P2,T1
DEFST8: PUSHJ P,GETWD1## ;GET SPT POINTER
MOVEM T1,SPTFIR##(P2) ;STORE IT IN TABLE
ADDI P2,1
SOJG P1,DEFST8 ;LOOP
SETZM (P2) ;ADD TERMINATING ZERO
REPEAT 0,< ;DO THIS WITH ADDSWP NOW
LDB T1,UNYK4S## ;GET SWAP K
ADDI P2,1
SKIPE T1 ;ANK SWAPPING K?
HRRM P2,UNIPTR##(U) ;SAVE IN UDB
IFN FTXMON,<
MOVSS P2 ;SECTION NUMBER
DPB P2,UNYSNS## ;STORE THAT EVEN THOUGH UNIPTR MAY BE 0
>
> ;END REPEAT 0
POP P,M ;RESTORE M
;CREATE A SAB RING
LDB P1,UNYSIC## ;P1=#SATS IN CORE
MOVEI P2,DIFSAB##(U) ;SO UNISAB GETS 1ST LINK
SETZM UNISAB##(U) ;INIDICATE NO RING SETUP YET
DEFS10: LDB T2,UNYWPS## ;T2=SAB LENGTH
ADDI T2,SABBIT##
DEFS11:
IFN FTXMON,<
PUSHJ P,GFWNZ2## ;GET IN SECTION 2 IF CAN
SKIPA ;CAN'T
JRST DEFS12 ;GOT IT
LDB T2,UNYWPS## ;RESET LENGTH
ADDI T2,SABBIT##
>
PUSHJ P,GETWDS## ;GET CORE FOR A SAB
JRST DEFS13 ;NOT ENOUGH--ERROR RETURN
DEFS12: MOVEM T1,SABRNG##(P2) ;LINK INTO RING
MOVE P2,T1
SETO T2, ;FORCE SAF BLOCK TO BE READ
TLZ T2,SAPDOB## ;CLEAR 'CHANGE' & 'BAD' BITS
MOVEM T2,SABFIR##(T1)
LDB T2,UNYWPS## ;SETUP AOBJ WD. FOR SABSCN
MOVNS T2
HRLI T2,SABBIT##
MOVSM T2,SABSCN##(T1)
SOJG P1,DEFS10 ;LOOP ON P1
DEFS13: MOVE T1,UNISAB##(U) ;ALLOCATE ANY SABS?
JUMPE T1,NCSDEF ;NO--ERROR RETURN
MOVEM T1,SABRNG##(P2) ;YES-CLOSE THE RING
SOJGE P1,NCSDEF ;ERROR IF NOT ALL SABS ALLOCATED
SOJG P3,DEFST4 ;LOOP ON NO. OF UNITS
HRRZS UNISTR##(U) ;END OF UNISTR CHAIN
;FINISH UP
PUSHJ P,BMPGEN ;SET UNIT GENERATION NUMBER
HRRZ T3,STRFSN##(F) ;GET F.S. #
MOVEM F,TABSTR##(T3) ; AND MAKE TABSTR ENTRY
IFN FTMDA,<
CAME J,TLPJOB## ;PULSAR DOING THE MOUNT?
PUSHJ P,STRMPA## ;NO--TELL QUASAR WHATS GOING ON
> ;END IFN FTMDA
JRST CPOPJ1## ;RETURN TO HAPPY USER
;ERROR RETURNS WHICH UNDO WHAT WAS DONE
UNFDEF: PUSHJ P,REMOV
JRST UNFERR
UNADEF: PUSHJ P,REMOV
JRST UNAERR
NCSDEF: PUSHJ P,REMOV
JRST NCSERR
PUSHJ P,REMOV
JRST TMEERR
REMOV: PUSHJ P,REMFS ;DUMP STR D.B.
PJRST REMUN ; & UNIT D.B'S
;SUBROUTINE TO TRANSFER USER ARGS. INTO MONITOR
;ENTRY MVWRD:
; GETS ONLY 1ST WORD OF USER TABLE RETURNS IT IN T1
; M=ADDR. OF USER'S PTR - 1 (BUMPED ON RETURN)
;ENTRY MVARG:
; P1='XCT' TABLE ADDRESS--DESTROYED
; M AS IN MVWRD
MVWRD: MOVEI P1,WD1TAB ;WILL GET ONLY 1ST WORD
MVARG: AOS M
PUSHJ P,GTWST2## ;GET USER PTR.
PUSH P,M ;SAVE M
HRR M,T1 ;SET M TO USER PTR
HLRZS T1 ;MAKE AOBJ WRD WITH USER LENGTH
MOVNS T1
HRL P1,T1
MVARG1: PUSHJ P,GTWST2## ;GET AN ARGUMENT
AOS M
XCT (P1) ;MOVE IT IN
AOBJN P1,MVARG1 ;LOOP
JRST MPOPJ## ;RESTORE M
;FOR ENDING TABLES:
DEFINE XCTEND<
JRST MPOPJ##>
UNTAB: ;------UNIT DATA BLOCK VALUES------
SKIP ;(0) PHYS.DRIVE NAME
MOVEM T1,UNIHID##(U) ;(1) UNIT ID
MOVEM T1,UNILOG##(U) ;(2) LOGICAL (WITHIN F.S.) UNIT NAME
DPB T1,UNYLUN## ;(3) LOGICAL UNIT # (WITHIN F.S.)
MOVEM T1,S ;(4) STATUS BITS (SAVE IN S)
HRLM T1,UNIGRP##(U) ;(5) # SEQ.BLKS. TO TRY FOR ON SEQ. OUTPUT
MOVEM T1,UNITAL##(U) ;(6) # FREE BLOCKS LEFT ON UNIT
DPB T1,UNYBPC## ;(7) BLOCKS/CLUSTER
HRRM T1,UNICPS##(U) ;(10) CLUSTERS/SAT
DPB T1,UNYWPS## ;(11) WORDS/SAF BLOCK
DPB T1,UNYSIC## ;(12) # SAT BLKS. IN CORE
DPB T1,UNYSPU## ;(13) SAT BLOCKS/UNIT
UDBSPT==.-UNTAB ;OFFSET TO SPT TABLE POINTER
MOVEM T1,P2 ;(14) PTR TO SPT TABLE(SAVE IN P2)
PUSHJ P,[SUBI T1,4 ;(15) 1ST BLOCK FOR SWAPPING ON UNIT
MOVEM T1,UNISLB##(U)
POPJ P,]
DPB T1,UNYK4S## ;(16) AMOUNT OF SWAPPING ON UNIT
XCTEND
FSTAB: ;------STR DATA BLOCK VALUES------
MOVEM T1,STRNAM##(T2) ;(0) F.S. NAME
SDBUNM==.-FSTAB ;OFFSET TO NUMBER OF UNITS
HRRM T1,STRUNM##(T2) ;(1) # OF UNITS
MOVEM T1,STRHGH##(T2) ;(2) HIGHEST LOGICAL BLK. #
MOVEM T1,STRSIZ##(T2) ;(3) SIZE OF F.S. (BLOCKS)
MOVEM T1,STRGAR##(T2) ;(4) MAX. GUARRENTEED FOR RESERVED QUOTAS
MOVEM T1,STRRES##(T2) ;(5) # RESERVED FREE BLOCKS LEFT
MOVEM T1,STRTAL##(T2) ;(6) # FCFS FREE BLKS. LEFT (- ASAFTY FACTOR)
MOVEM T1,STROVR##(T2) ;(7) # BLKS. ALLOWED ON OVERDRAW
MOVEM T1,STRPT1##(T2) ;(10) 1ST RET.PTR. TO MFD
DPB T1,STY1PT## ;(11) 1 IF STRPT1 IS ONLY PTR TO UFD
DPB T1,STYUN1## ;(12) F.S. UNIT # OF STRPT1
DPB T1,STYTRY## ;(13) # RETRYS ON ERROR
MOVEM T1,STRBPU##(T2) ;(14) NOMINAL BLKS/UNIT
HRLM T1,STRBSC##(T2) ;(15) BLKS/SUPER CLUSTER
HRRM T1,STRSCU##(T2) ;(16) SUPER CLUSTERS/UNIT
JFCL ;(17) STRJOB NOT SET BY .FSDEF ANYMORE
HLLM T1,STYCNP##(T2) ;(20) BYTE PTR. TO RET.PTR CLUSTER COUNT
HLLM T1,STYCKP##(T2) ;(21) ...CHK.SUM
HLLM T1,STYCLP##(T2) ;(22) ...CLUSTER ADDRESS
IFN FTPSTR,<
DPB T1,STYPV2## ;(23) 1 IF STR IS PRIVATE
>
IFE FTPSTR,<
JFCL
>
MOVEM T1,STRPPN##(T2) ;(24) PPN OF THE OWNER OF THIS F.S.
MOVEM T1,STRCRS##(T2) ;(25) BLOCK IN STR OF RIB FOR CRASH.EXE
HRRM T1,STRK4C##(T2) ;(26) K FOR CRASH
IFE FTSETS,<
JFCL
>; END IFE FTSETS
IFN FTSETS,<
DPB T1,STYSE2## ;(27) SET NUMBER
>; END IFN FTSETS
WD1TAB: XCTEND ;NULL XCT-TABLE FOR MVWRD
;ROUTINE TO ENSURE ARGUMENTS FOR THE STRUUO DEFINE STRUCTURE
;FUNCTION ARE IN CORE (SINCE PULSAR IS USUALLY VIRTUAL) SO WE
;DON'T RESTART THE UUO AND LOSE FREE CORE, ETC.
DEFINC: PUSH P,M ;SAVE ORIGINAL ARGUMENT POINTER
PUSHJ P,GETWD1## ;GET POINTER TO SDB DATA
PUSHJ P,DEFCKP ;ADDRESS CHECK THE STRUCTURE DATA BLOCK DATA
PUSH P,M ;SAVE POINTER A MOMENT
HRRI M,SDBUNM(T1) ;ADDRESS OF WORD CONTAINING # OF UNITS
PUSHJ P,GETWDU## ;GET IT
MOVE P1,T1 ;COPY COUNT TO P1
POP P,M ;RESTORE POINTER
DEFIN1: PUSHJ P,GETWD1## ;GET NEXT UNIT POINTER
PUSHJ P,DEFCKP ;ADDRESS CHECK THE UNIT DATA BLOCK DATA
PUSH P,M ;SAVE POINTER A MOMENT
HRRI M,UDBSPT(T1) ;ADDRESS OF WORD CONTAINING SPT TABLE POINTER
PUSHJ P,GETWDU## ;GET IT
PUSHJ P,DEFCKP ;ADDRESS CHECK THE SPT TABLE
POP P,M ;RESTORE POINTER
SOJG P1,DEFIN1 ;LOOP FOR ALL UNITS
JRST MPOPJ## ;RESTORE ORIGINAL POINTER AND RETURN
;HELPER ROUTINE TO CHECK A POINTER TO DATA. CALL WITH POINTER
;(LEN,,ADDR) IN T1, RESOLVES TO ADDR IN T1, LEN IN T2. NEVER
;RETURNS IF ADDRESS CHECK (EXITS VIA UADERR).
DEFCKP: HLRZ T2,T1 ;GET LENGTH
HRRZS T1 ;ISOLATE ADDRESS
PUSHJ P,ARNGE## ;MAKE SURE IN CORE
POPJ P, ;OK IF NOT LEGAL FOR I/O
JRST UADERR## ;ADDRESS CHECK
POPJ P, ;LOOKS OK
SUBTTL STRUUO UUO - REDEFINE F.S. STATUS
;FUNCTION TO REDEFINE A FILE STRUCTURE, WHICH MEANS CHANGING THE BITS
RDFSTR: JSP T4,PRIVJ ;MUST BE PRIVILEGED
JSP T4,STLOCK ;GET FF RESOURCE
PUSHJ P,CKJPPN ;MAKE F=USER JOB # (OR 0 FOR SYS.SRC.LST)
JRST PPNERR ;BAD JOB # - PPN PAIR
PUSHJ P,GETWD1## ;GET STR NAME
PUSHJ P,SRSTR ;SEE IF IT EXISTS
JRST SNXERR ;NO
MOVE T1,STRMNT##(T3) ;MOUNT COUNT MUST = 0 OR 1
SOJG T1,MCNERR
HRRZ P1,STRJOB##(T3) ; OR JOB MUST BE ONLY USER
CAME P1,F
JUMPE T1,MCNERR
PUSHJ P,GETWD1## ;GET NEW STATUS BITS IN T1
SETZM STRJOB##(T3)
SKIPE STRMNT##(T3) ;IF M.C.=1
HRROM F,STRJOB##(T3) ; LH (STRJOB) = -1
TLNE T1,DEFSAF ;IF SINGLE ACCESS
HRRZM F,STRJOB##(T3) ; RH (STRJOB) = F
SETZB P1,P2
TLO P2,UNPSTS## ;CONVERT UUO BITS TO UNIDES BITS
TLNE T1,DEFAWL
TLO P1,UNPAWL##
RDFST1: ANDCAM P2,UNIDES##(U)
ORM P1,UNIDES##(U)
HLRZ U,UNISTR##(U)
JUMPN U,RDFST1
JRST CPOPJ1##
SUBTTL STRUUO UUO - LOCK OUT## A F.S.
;FUNCTION TO LOCK OUT NEW INIT'S, ENTER'S, ETC.
LOKSTR: JSP T4,PRIVJ ;MUST BE PRIVILEGED TO DO THIS
JSP T4,STLOCK ;GET FF RESOURCE
PUSHJ P,GETWD1## ;GET FILE STRUCTURE
PUSHJ P,SRSTR ;SEE IF IT EXISTS
JRST SNXERR ;NO
LCKSTR: MOVSI T1,UNPNNA## ;NO NEW ACCESS BIT
IFN FTMDA,<
MOVE T2,DATE## ;GET CURRENT DATE
> ;END IFN FTMDA
LOKST1: IORM T1,UNIUST##(U)
IFN FTMDA,<
MOVEM T2,UNILTM##(U) ;MARK TIME OF LOCK
> ;END IFN FTMDA
HLRZ U,UNISTR##(U)
JUMPN U,LOKST1
IFN FTMDA,<
;SET JS.OLS FOR ALL JOBS WHICH HAVE MOUNTED
; THE JUST-LOCKED STRUCTURE
PUSHJ P,SAVE2## ;AND SOME P'S
PUSH P,J ;SAVE CURRENT JOB
MOVE J,HIGHJB## ;GET HIGHEST JOB IN USE
HRRZ P1,STRFSN##(T3) ;GET LOCKED STR NUMBER
LOKST2: PUSHJ P,SLPTR ;MAKE PTR IN P2 FOR THIS JOB
JRST LOKST3 ;CAN'T, TRY NEXT JOB
MOVE T1,P1 ;GET BACK STR NUMBER
MOVSI T2,(JB.LBT) ;GET BATCH BIT
TDNN T2,JBTLIM##(J) ;IS THIS JOB BATCH?
PUSHJ P,SLFND ;NO, DOES JOB HAVE STR?
JRST LOKST3 ;BATCH, OR NOT MOUNTED, QUIT
MOVSI T1,(JS.OLS) ;T/S WITH STR MOUNTED,
IORM T1,JBTST2##(J) ; LITE BIT FOR RESET CHECK.
LOKST3: SOJG J,LOKST2 ;CHECK ALL JOBS
POP P,J ;RESTORE LOCKER'S JOB #
> ;END IFN FTMDA
JRST CPOPJ1##
IFN FTMDA,<
;FUNCTION TO CLEAR LOCK OUT NEW INIT'S, ENTER'S, ETC.
CLKSTR: JSP T4,PRIVJ ;MUST BE PRIVILEGED TO DO THIS
JSP T4,STLOCK ;GET FF RESOURCE
PUSHJ P,GETWD1## ;GET FILE STRUCTURE
PUSHJ P,SRSTR ;SEE IF IT EXISTS
JRST SNXERR ;NO
MOVSI T1,UNPNNA## ;NO NEW ACCESS BIT
TDNE T1,UNIUST##(U) ;WAS THE STRUCTURE LOCKED
SKIPN UNILTM##(U) ; AND BY THE OPERATOR
PJRST ILFERR ;NO THEN ILLEGAL
CLKST1: ANDCAM T1,UNIDES##(U)
SETZM UNILTM##(U) ;STORE THE TIME OF THE LOCK COMMAND
HLRZ U,UNISTR##(U)
JUMPN U,CLKST1
JRST CPOPJ1##
>;END IFN FTMDA
;SUBROUTINE CHKLOK - CHECK THE STATUS OF THE LOCK BIT FOR A UNIT
;CALL MOVEI U,POINTER TO THE UNIT
; PUSHJ P,CHKLOK
;RETURN CPOPJ ;UNIT IS LOCKED BY THE SYSTEM (NO ACCESS)
; OR LOCKED BY THE OPERATOR FOR THIS JOB
; CPOPJ1 ;UNIT IS NOT LOCKED
IFN FTMDA,<
CHKLOK::
PUSHJ P,SAVT##
MOVE T1,UNIUST##(U) ;GET THE LOCK WORD
TLNN T1,UNPNNA## ;IS THE STRUCTURE LOCKED
JRST CPOPJ1## ;NO, CONTINUE
SKIPN UNILTM##(U) ;GET THE TIME OF THE LOCK (IF BY OPR)
JRST CPOPJ1## ;NOT BY THE OPERATOR (SYSTEM LOCK)
PUSHJ P,SAVJW##
MOVE J,.CPJOB## ;GET THE JOB NUMBER
PUSHJ P,FNDPDB## ;YES, FIND THE PDB
JRST CPOPJ1## ;NO PDB?!
MOVE T1,UNILTM##(U) ;GET THE LOCK TIME
MOVSI T2,(JB.LBT) ;GET BATCH BIT
TDNE T2,JBTLIM##(J) ;IS THIS JOB BATCH?
JRST CPOPJ1## ;YES, LET IT IN.
MOVSI T2,JACCT ;IF JACCTED
TDNN T2,JBTSTS##(J) ;SKIP IF BATCH
CAMLE T1,.PDSTM##(W) ;T/S, WAS JOB USING STR BEFORE LOCK?
AOS (P) ;UNIT LOCKED BY OPERATOR BUT OK FOR THIS JOB
POPJ P,
>;END IFN FTMDA
SUBTTL STRUUO UUO - REMOVE A F.S.
;FUNCTION TO REMOVE A FILE STRUCTURE FROM THE SYSTEM
REMSTR: JSP T4,PRIVJ ;MUST BE PRIVILEGED TO DO THIS
PUSHJ P,GETWD1## ;GET STR NAME
TDZA T2,T2 ;USE T2 AS A FLAG TO
RMVSTR::SETOM T2 ; REMEMBER ENTRY POINT
PUSHJ P,SAVE4## ;SAVE P1-P4
JSP T4,STLOCK ;GET FF RESOURCE
PUSHJ P,SRSTR ;SEE IF WE EXIST
JRST CPOPJ1## ;NO, EXIT
PUSHJ P,CHKSWP ;INSURE NO UNITS IN ASL
JUMPE T2,ASLERR ;GIVE FAIL RETURN IF ENTRY AT REMSTR
MOVE F,T3 ;SAVE STR D.B. ADDR.
PUSH P,T2 ;SAVE ENTRY FLAG
MOVSI T1,UNPNNA## ;HAS STR BEEN LOCKED AGAINST NEW ACCESSES?
TDNN T1,UNIUST##(U) ;...
PUSHJ P,LCKSTR ;NO, DO SO NOW
JFCL ;SKIP RETURNS
PUSHJ P,WATIDL ;WAIT FOR STR TO BECOME IDLE
SETOM STRSDL##(F) ;REMOVE FROM THE SDL
PUSHJ P,SDLBLD## ;REBUILD THE PRESERVED SDL
JFCL ;BOOTSTRAP NOT AVAILABLE
MOVSI U,MJOBN## ;MINUS MAXIMUM NUMBER OF JOBS
HRRZ T1,STRFSN##(F) ;T1=F/S#
REMST1:
;HERE FOR EACH JOB NUM., REMOVE FSN IF IN JOB'S SEARCH LIST
;RH(U) = JOB NUMBER OR 0 (FOR SYS SL), T1=FSN
HRRZ J,U
PUSHJ P,SLPTR
JRST REMST4 ;NO SUCH SEARCH LIST
PUSHJ P,SLFND
JRST REMST4 ;JUMP IF FSN NOT IN SL.
PUSHJ P,REMSL ;ELSE REMOVE IT
REMST4: AOBJN U,REMST1 ;CHECK ALL SEARCH LISTS
; RETURN ALL CORE BLOCKS
HRRZ P4,STRFSN##(F) ;REMCB WANTS F.S. # IN P4
PUSHJ P,REMCB ;RETURN CORE FOR NMB,UFB, AND ACL BLOCKS
HLRZ U,STRUNI##(F) ;START AT 1ST UNIT IN F/S
REMST5: PUSHJ P,CSDELU## ;INVALIDATE DISK CACHE FOR THIS UNIT
HRRZ T2,UNIPTR##(U) ;DE-ALLOCATE ANY SWAPPING SAT CORE
IFN FTXMON,<
LDB T1,UNYSNS## ;FROM THE RIGHT SECTION
HRLI T2,(T1) ;..
>
HLRE T1,UNIPTR##(U) ;HOW MUCH
JUMPE T1,REMST6 ;NOTHING
SETZM UNIPTR##(U) ;DON'T HAVE ANY MORE SWAPPING SAT
SETZM UNIK4S##(U) ;NO MORE SWAPPING SPACE AVAILABLE ON UNIT
MOVNS T1
PUSHJ P,TSTGIV ;RETURN THE CORE
REMST6: HLRZ U,UNISTR##(U) ;GET NEXT UNIT
JUMPN U,REMST5 ;IF ANY
PUSHJ P,REMUN ;RETURN THE UNIT DB.S
POP P,T2 ;RESTORE FLAG
IFN FTMDA,<
MOVE T1,.CPJOB## ;GET OUR JOB NUMBER
SKIPN T2 ;REPORT CHANGE IF DETACHING CPU
CAME T1,TLPJOB## ;IS IT PULSAR?
PUSHJ P,REMMPA## ;TEL MDA
>
PUSHJ P,REMFS ;RETURN STR D.B., # ETC.
JRST CPOPJ1## ; AND SKIP RETURN TO USER
;ROUTINE TO BUMP UNIGEN OF ALL UNITS IN STR AND WAIT FOR STR
;TO BECOME IDLE.
;CALL:
; F/ STR DB ADDR
WATIDL: PUSHJ P,BMPGEN ;BUMP GENERATION NUMBER OF ALL UNITS
PUSH P,F ;SAVE F
SETZ F, ;DON'T DIDDLE WITH EVM
PUSHJ P,GVCBJ ;GIVE UP THE CB SO OTHERS BLOCKED IN FILSER
; CAN COMPLETE BEFORE WE RETURN
POP P,F ;RESTORE F
;NOW WAIT FOR ALL UNITS TO BECOME IDLE
WATID1: HLRZ U,STRUNI##(F) ;BACK TO FIRST UNIT
WATID2: SKIPE UNIQUE##(U) ;ANYTHING QUEUED?
JRST WATID3 ;YES, MUST WAIT A WHILE LONGER
SKIPE T1,UNISTS##(U) ;GET UNIT STATUS, SKIP IF UNIT IS IDLE
CAIL T1,OWCOD## ;SOME FLAVOR OF OPR WAIT?
SKIPA ;IDLE OR IN OPR WAIT
JRST WATID3 ;UNIT ISN'T IDLE
HLRZ U,UNISTR##(U) ;NEXT UNIT IN THIS STR
JUMPN U,WATID2 ;LOOP FOR ALL
PUSH P,F ;SAVE F A BIT
SETZ F, ;DON'T DIDDLE WITH EVM
PUSHJ P,GETCB ;GET CB BACK
JRST FPOPJ## ;RETURN
WATID3: MOVEI T1,1 ;WAIT FOR A SECOND
PUSHJ P,SLEEPF## ;ZZZ
JRST WATID1 ;CHECK AGAIN
SUBTTL STRUUO - UFD INTERLOCK
LKCLNA==3 ;MUST HAVE 3 ARGS INCLUDING FUNCTION CODE
ULKSTR: TDZA P3,P3 ;CLEAR P3 AND SKIP
UCLSTR: SETO P3, ;SET P3 NON-0
JSP T4,PRIVJ ;ONLY RETURN IF PRIVILEGED JOB
HLRZ T1,P4 ;T1=NUMBER OF ARGS
CAIGE T1,LKCLNA ;MUST HAVE ENOUGH ARGS
PJRST ILLERR ;NOT ENOUGH ARGUMENTS
PUSHJ P,GETWD1## ;GET STR NAME
MOVE P1,T1 ;SAVE IN P1 FOR LOKPPB OR NLKPPB
PUSHJ P,GETWD1## ;GET PPN
MOVE P2,T1 ;SAVE IN P2 FOR LOKPPB OR NLKPPB
PJUMPE P3,LOKPPB ;IF ILK, CALL LOKPPB TO TEST/SET
PUSHJ P,NLKPPB ;ELSE CALL NLKPPB TO CLEAR
PJRST CPOPJ1## ;AND RETURN OK
;CODE TO INTERLOCK FILSER DATA BASE FOR STR UUOS
; I.E. DO ONE UUO AT A TIME
; JSP T4,STLOCK
; --WILL BE UNLOCKED BY MATCHING POPJ (OR CPOPJ1)--
STLOCK: SETZM F ;INDICATE NO DDB
PUSHJ P,CBWAIT##
PUSHJ P,(T4)
SOS (P)
SETZM F ;INDICATE NO DDB
PJRST GVCBJ1
;SUBROUTINE TO TEST/SET UFD INTERLOCK
;ENTER WITH P1=STR NAME P2=PRJ-PRG
;CALL LOKPPB TO TEST/SET INTERLOCK
;RETURN CPOPJ IF UFD WAS ALREADY INTERLOCKED
;CPOPJ1 IF IT WAS NOT - IT NOW IS INTERLOCKED
LOKPPB: PUSHJ P,PPBBIT ;GET L(UFB), BIT TO TEST
PJRST SNXERR ;NOT F/S NAME - ERROR RETURN
TDNE T1,PPBLOK##(T2) ;%LOCKED?
PJRST GVCBJ ;%YES - NON SKIP RETURN
ORM T1,PPBLOK##(T2) ;%NO. NOW IT IS
PJRST GVCBJ1 ;%GIVE UP CB AND SKIP-RETURN
;SUBROUTINE TO CLEAR THE UFD INTERLOCK
;CALL WITH P1=STR NAME P2=PRJ-PRG
;ALWAYS RETURNS CPOPJ
NLKPPB: PUSHJ P,PPBBIT ;GET UFB, BIT TO CLEAR
POPJ P, ;NOT AN STR NAME
ANDCAM T1,PPBLOK##(T2) ;%CLEAR THE BIT
MOVE T1,P2 ;%GET PPN
PJRST TSTPPX## ;%AND TRY TO REMOVE PPB
;SUBROUTINE TO COMPUTE THE UFB LOC, AND BIT POSITION FOR LOKPPB/NLKPPB
;ENTER WITH P1=STR NAME, P2=PRJ-PRG
;EXIT CPOPJ IS P1 IS NOT AN STR NAME
;EXIT CPOPJ1 OK, WITH T1=BIT, T2= UFB LOC RETURNS WITH CB RESOURCE
PPBBIT: MOVE T1,P1 ;STR NAME
PUSHJ P,SRSTR ;FIND THE STR
POPJ P, ;NOT AN STR
HRRZ T1,T4 ;INDEX OF STR
PUSHJ P,FSNPS2 ;POSITION BIT FOR THE STR
PUSH P,T2 ;SAVE THE BIT
MOVE T1,P2 ;PRJ-PRG
MOVEI F,0 ;INDICATE NO DDB
PUSHJ P,GETCB
HLRZ T2,SYSPPB## ;%1ST PPB IN SYSTEM
MOVEI T3,DIFPPL## ;%IN CASE THIS CREATES 1ST PPB BLOCK
PUSHJ P,LSTSRC ;%FIND PPB FOR THIS USER (MAY CREATE ONE)
SKIPE T2 ;%CREATED ONE
PJRST TPOPJ1## ;%RESTORE THE BIT INTO T1 AND RETURN
POP P,(P) ;ADJUST STACK
POP P,(P)
PUSHJ P,GVCBJ ;RETURN THE CB
PJRST NCSERR ;NO FREE CORE - ERROR RETURN
;SUBROUTINE TO UNLINK STR D.B. & RETURN CORE IF IN FREE CORE,
; CLEAR STRNAM IF PERMANENTLY ASSIGNED MONITOR CORE
;CALL F=ADDR. STR D.B.
;MAY ALSO BE CALLED BY THE DEFINE FUNCTION (SUBROT REMOV)
REMFS: HRRZ T1,STRFSN##(F) ;GET STR#
SETZM TABSTR##(T1) ; & RETURN IT
PUSHJ P,REMSEG## ;DELETE ALL SHARABLE HIGH SEGMENTS
; INITIALIZED FROM THIS STR
; (MARK FOR DELETION IF STILL IN USE)
MOVEI T1,DIFSTR## ;REMOVE FROM SYSSTR CHAIN
REMFS0: MOVE T2,T1
HLRZ T1,STRSYS##(T1)
JUMPE T1,REMFS1
CAME T1,F
JRST REMFS0
MOVE T1,STRSYS##(T1)
HLLM T1,STRSYS##(T2)
REMFS1: MOVE T2,F ;RETURN THE FREE CORE
MOVEI T1,STRLEN##
PJRST TSTGIV
;SUBROUTINE TO REMOVE F.S. FROM SEARCH LIST WORD
;CALL P2 = PTR TO FSN TO REMOVE
; USES T3,T4
;STOPCD AES IF P2 POINTS TO END OF SL. OR IMPOSSIBLE RETURN FROM SLBLT
REMSL: PUSHJ P,SAVE3## ;SAVE SOME ACS
PUSH P,T1
MOVE P3,P2 ;P3=PTR TO FSN TO REMOVE
PUSHJ P,SLGET
PUSHJ P,SLXAES ;STOPCD AES
PUSHJ P,SLINC
PUSHJ P,SLXAES
PUSHJ P,SLBLT ;BLT OVER FSN TO BE REMOVED
PUSHJ P,SLXAES ;CANT HAPPEN
PJRST TPOPJ## ;DONE - RETURN
;SUBROUTINE TO SET F.S. UNITS TO 'NO PACK MOUNTED' AND
; RETURN ANY FREE CORE USED
;CALL: F=ADDRESS STR D.B.
; ; USES U
;MAY ALSO BE CALLED BY THE DEFINE FUNCTION (SUBROT REMOV)
REMUN: HLRZ U,STRUNI##(F)
JUMPE U,CPOPJ## ;RETURN IF NO UNITS
PUSHJ P,BMPGEN ;SET UNIT GENERATION NUMBER
HLRZ U,STRUNI##(F) ;GET 1ST UNIT BACK
REMUN1: SETZM UNIHID##(U) ;CLEAR UNIT, ID
SETZM UNILOG##(U) ; AND LOG. NAME
HLLZS UNIFKS##(U)
HLLZS UNISTR##(U) ; & PTR TO STR DB
IFN FTDUAL,<
SKIPN T1,UNI2ND##(U) ;DUAL PORTED
JRST REMUN2 ;NO
SETZM UNIHID##(T1) ;CLEAR UNIT ID AND
SETZM UNILOG##(T1) ; LOG NAME FOR 2ND PORT ALSO
HLLZS UNISTR##(T1)
REMUN2:
>
PUSHJ P,CSDELU## ;INVALIDATE DISK CACHE FOR THIS UNIT
MOVEI T1,UNVNPM## ;SET STATE TO NO PACK MOUNTED
DPB T1,UNYUST##
MOVEI T1,-1 ;DONT KNOW HOW MANY
DPB T1,UNYBCT## ; SLOTS LEFT IN BAT BLOCK
MOVSI T1,UNPNNA## ;MAKE SURE NO NEW ACCESSES IS OFF
ANDCAM T1,UNIUST##(U) ; SO OMOUNT WILL FIND UNIT
IFN FTMDA,<
SETZM UNILTM##(U) ;CLEAR LOCK TIME
> ;END IFN FTMDA
PUSHJ P,SSTGIV ;GIVE BACK CORE FOR SAB AND SPT
HLRZ U,UNISTR##(U) ;GET ADDR OF NEXT UNIT ON STR
JUMPN U,REMUN1 ;LOOP FOR ALL
POPJ P,
;ROUTINE TO SET THE UNIT GENERATION NUMBER ON ALL UNITS IN STR.
BMPGEN: HLRZ U,STRUNI##(F) ;GET 1ST UNIT
AOS T1,SYSGEN## ;BUMP COUNT
BMPGN1: HRRZM T1,UNIGEN##(U) ;STORE IN PRIME PORT
IFN FTDUAL,<
SKIPE T2,UNI2ND##(U) ;AND IN SECOND PORT
HRRZM T1,UNIGEN##(T2)
>
HLRZ U,UNISTR##(U) ;STEP TO NEXT UNIT IN STR
JUMPN U,BMPGN1 ;AND LOOP
POPJ P,
;SUBROUTINE TO RETURN CORE ALLOCATED FOR SAB AND SPT FOR A UNIT
;ARG U=ADDR OF UNIT DATA BLOCK
SSTGIV: PUSHJ P,SAVE4##
SE1ENT ;MUST BE IN SECTION 1 TO FOLLOW THE SAB RING
MOVE P3,UNISAB##(U) ;P3=ADDR OF SAB RING
JUMPE P3,SSTGV2 ;JUMP IF NO RING SET UP
SETZM UNISAB##(U) ;SAY WE'VE GIVEN BACK SAB
MOVE P2,P3
LDB P4,UNYWPS## ;DATA WORDS PER SAT BLOCK
SSTGV1: MOVE T2,P3 ;T2=ADDR OF CURRENT SAB BLOCK
MOVE P3,SABRNG##(P3) ;P3=ADDR OF NEXT
MOVEI T1,SABBIT##(P4) ;T1=NUMBER OF WORDS PER SAB
PUSHJ P,TSTGIV
CAME P3,P2 ;GONE AROUND THE RING?
JRST SSTGV1 ;NO, LOOK AT NEXT ONE
SSTGV2: MOVE T2,UNISPT##(U) ;START OF SPT
JUMPE T2,CPOPJ## ;JUMP IF NO SPT SET UP
SETZM UNISPT##(U) ;SAY WE'VE GIVEN BACK SPT
LDB T1,UNYSPU## ;NUMBER OF WRDS IN SPT
ADDI T1,SPTFIR##+1 ; + OVERHEAD
; PJRST TSTGIV ;RETURN THE SPACE AND RETURN
TSTGIV: MOVEI T3,GIVWDS## ;ASSUME LOW CORE
TLNN T2,-1 ;NZS CORE?
CAMGE T2,LOCORE## ;OR ONCE CORE?
MOVEI T3,GVFWDS## ;YES
PJRST (T3)
;SUBROUTINE TO RETURN CORE AND FIX CORE BLOCKS FOR
; A DISAPEARING F.S.
;CALL: P4=F.S. #
; ;USES P1,P2,P3
;SCAN ALL PPB BLOCKS
REMCB: MOVEI P1,DIFPPL##
REMCB2: HLRZ P1,PPBSYS##(P1) ;P1=NEXT PPB BLOCK
JUMPE P1,CPOPJ## ;RETURN IF NO MORE PPB BLOCKS
MOVE T1,P4 ;CLEAR KNO, YES, AND LOK BITS
PUSHJ P,FSNPS2
ANDCAM T2,PPBKNO##(P1) ;CLEAR KNO
ANDCAM T2,PPBYES##(P1) ; YES
ANDCAM T2,PPBLOK##(P1) ; CLEAR UFD INTERLOCK BITS
;REMOVE ANY UFB BLOCKS WITH THIS F.S. #
MOVEI T2,DIFPBC##(P1)
REMCB4: MOVE T3,T2 ;REMEMBER AS PREVIOUS BLOCK
HLRZ T2,UFBPPB##(T2) ;T2=NEXT UFB BLOCK
JUMPE T2,REMCB5 ;JUMP IF END OF CHAIN
LDB T1,UFYFSN## ;T1=ITS F.S.#
CAIE T1,(P4) ;SAME AS ONE WE'RE REMOVING?
JRST REMCB4 ;NO--GET NEXT BLOCK
MOVE T4,T2 ;YES - REMOVE IT
PUSHJ P,RET4WD##
;SCAN ALL NMB BLOCKS FOR THIS PPB BLOCK
REMCB5: MOVEI P2,DIFPNL##(P1)
REMCB6: HLRZ P2,NMBPPB##(P2) ;P2=NEXT NMB BLOCK
JUMPE P2,REMCB2 ;JUMP IF NO MORE NMB'S
TRZE P2,NMPUPT## ;IF UPWARD POINTER FROM LOWER SFD
JRST REMC6B ; DO IT NOW
REMC6A: HLRZ T1,NMBRNG##(P2) ;IS THIS AN SFD NMB?
SKIPE T1
TRZE T1,NMPUPT## ;WHICH POINTS AT A LOWER-LEVEL NMB CHAIN?
JRST REMC6B ;NO
HRRZ P2,T1 ;YES, DROP DOWN TO THAT CHAIN
JRST REMC6A ;AND TEST THE NMBS ON THAT LEVEL
REMC6B: MOVE T1,P4 ;FSN
PUSHJ P,FSNPS2 ;GET BIT TO CLEAR KNO & YES
ANDCAM T2,NMBKNO##(P2)
ANDCAM T2,NMBYES##(P2)
MOVE T2,P2 ;DOES NMB HAVE OUR F.S.#?
LDB T1,NMYFSN##
CAIN T1,(P4)
HLLZS NMBCFP##(P2) ;YES - CLEAR CFP
;FIND ALL A.T.'S WITH THIS F.S. #
REMCBX: MOVEI T1,DIFNAL##(P2)
REMCB7: HLRZ T1,ACCNMB##(T1) ;T1=NEXT A.T.
TRNE T1,DIFNAL## ;END OF RING?
JRST REMCB6 ;YES-GET NEXT NMB BLOCK
LDB T2,ACZFSN## ;NO--T2=ITS F.S. #
CAIE T2,(P4) ;SAME AS ONE WE'RE REMOVING?
JRST REMCB7 ;NO--KEEP LOOKING
LDB T2,ACYCNT## ;NUMBER OF READERS ON THIS F/S
MOVNS T2
ADDM T2,NMBCNT##(P2) ;DECREMENT NMB USE-COUNT
ADDM T2,PPBCNT##(P1) ;DECREMENT PPB USE-COUNT
;REMOVE THE A.T.
PUSH P,F ;TELL ATRMOV 'NO DDB'
SETZ F,
PUSHJ P,ATRMOV ;REMOVE IT AND RETURN ITS CORE
POP P,F
;HERE TO TEST IF ANYBODY HAD THEIR PATH SET TO AN
;SFD THAT EXISTED ON THE STR WE JUST YANKED.
MOVE T3,HIGHJB## ;STARTING JOB
REMCBY: HRRZ T4,JBTSFD##(T3) ;PATH SET HERE?
TRZ T4,CORXTR##
CAME T4,P2
JRST REMCBZ ;NO
AOS NMBCNT##(P2) ;YES, WE ADJUSTED COUNT TOO MUCH
AOS PPBCNT##(P1) ;SET PATH BUMPS ONLY ACCCNT
MOVE T2,JBTSFD##(T3) ;GET SCAN SWITCH
ANDI T2,CORXTR##-JBPUFB##
ADDI T2,JBPUFB##(P1) ;BUILD POINTER TO UFD
HLRZ T4,NMBACC##(P2) ;SFD EXIST ONLY ON YANKED STR?
TRNE T4,DIFNAL## ;I.E. NO ACCS LEFT
HRRM T2,JBTSFD##(T3) ;YES, SET PATH TO UFD
REMCBZ: SOJG T3,REMCBY ;NEXT JOB
JRST REMCBX ;CHECK NEXT ACC
;SUBROUTINE TO GET JOB # & PPN FROM ARG. LIST AND CK FOR A MATCH
;CALL: UUO=ADDRESS-1 OF JOB # ARG.
; PPN ARG. FOLLOWS
;RETURN+0 IF RIDICULOUS JOB # OR DOESNT MATCH PPN
;RETURN+1 IF JOB # ARG. MATCHES PPN ARG.: F=JOB # ARG. T1=PPN ARG
; IF JOB # ARG.=PPN ARG.=-1: F=J (CURRENT JOB #) T1=JOBS PPN
; IF JOB # ARG. = 0, : F = 0 (SYS.SRC.LIST) T1=SYSPPN
CKJPPN: PUSHJ P,GETWD1## ;T1=JOB # (1ST ARG.)
JUMPN T1,CKJPP2 ;IF 0:
PUSHJ P,GETWD1## ; FORCE PPN=SYSPPN
MOVE T1,SYSPPN##
SETZ F, ; RETURN 0 FOR SYS.SRC.LST
JRST CPOPJ1##
CKJPP2: SKIPG T1 ;IF -1: USE CURRENT JOB #
MOVE T1,J ;F=JOB NUMBER
PUSHJ P,LGLPRC## ;LEGAL JOB #?
POPJ P, ;NO
MOVE T4,JBTSTS##(T1) ;MAYBE (CK JNA BIT)
TLNN T4,JNA
POPJ P, ;NO
MOVE F,T1 ;YES--MAKE F=JOB #
PUSHJ P,GETWD1## ;T1=PPN
SKIPG T1 ;IF -1: USE CURRENT PPN
MOVE T1,JBTPPN##(F)
CAME T1,JBTPPN##(F) ;IS PPN FOR THIS JOB #?
POPJ P, ;NO
JRST CPOPJ1## ;YES--GOOD MATCH
;SUBROUTINE TO FIND A 0 ENTRY IN TABSTR
;EXIT P2=INDEX TO ENTRY
SRCTBS: MOVE P2,STRAOB## ;AOBJN WORD FOR TABSTR
SKIPLE TABSTR##(P2)
AOBJN P2,.-1
JUMPL P2,CPOPJ1##
POPJ P, ;NO SLOTS AVAILABLE
;SUBROUTINE TO CK FOR PRIVILEGED JOB (FAILSAFE PPN OR JACCT LIT)
;CALL: JSP T4,PRIVJ
; J=JOB #
; PRESERVES T1
;RETURNS IF PRIVILEGED OTHERWISE GOES TO NPVERR
PRIVJ: MOVE T3,JBTPPN##(J) ;IS IT FAILSAVE
MOVE T2,JBTSTS##(J) ; OR JACCT=1?
CAME T3,FFAPPN##
TLNE T2,JACCT
JRST (T4) ;YES-RETURN
JRST NPVERR ;NO--ERROR RETURN TO USER
;SUBROUTINE TO INSURE THAT NO UNITS IN A STR ARE IN THE ASL.
;CALL: U=UDB FOR FIRST UNIT IN STR
; PUSHJ P,CHKSWP
;RETURN+0 IF SOME UNIT IN ASL
;RETURN+1 IF NONE IN ASL
;RESPECTS T2,T3
CHKSWP: JUMPE U,CPOPJ1## ;PROTECT AGAINST ABSURD CALL
CHKSW1: MOVSI T1,MSWPMX## ;BUILD AOBJN POINTER FOR SWPTAB
CAME U,SWPTAB##(T1) ;FIND THIS UNIT IN SWPTAB?
AOBJN T1,.-1 ;NO, LOOP
JUMPL T1,CPOPJ## ;SOME UNIT FOUND
HLRZ U,UNISTR##(U) ;STEP TO NEXT UNIT IN STR
JUMPN U,CHKSW1 ;CHECK THAT ONE
JRST CPOPJ1## ;GIVE GOOD RETURN
SUBTTL DSKCHR UUO
CODDSK==0
CODSFS==1
MCDSFS==CODSFS-CODLUF
CODSTR==2
CODLUF==3
MCDLUF==CODLUF-CODSTR
CODKNC==4
CODKON==5
CODPUN==6
DSKCHR::PUSHJ P,SAVE2##
HLRZ T3,T1 ;COMPUTE LAST ADDRESS OF TABLE
MOVN J,T3
HRLZS J
JSP T4,STLOCK ;LOCK DATA SO IT CAN BE BELIEVED
HRR M,T1
PUSH P,J ;SAVE J
PUSHJ P,GETWDU## ;GET DISK NAME FROM USER "LOC"
; AND SET J TO CURRENT JOB
TLNE T1,-1 ;SIXBIT?
JRST DSKCH0 ;YES
PUSHJ P,DVCNSG## ;NO-CHAN NUMBER?
JRST TPOPJ## ;NO, ERROR
MOVE T1,DEVNAM(F) ;YES, GET SIXBIT NAME
MOVSI T2,DVDSK ;IS IT A DISK?
TDNN T2,DEVMOD(F)
JRST DSKCH0 ;NO
HRRZ T2,DEVACC##(F) ;FILE OPEN?
JUMPE T2,DSKCH0
HLRZ U,DEVUNI##(F) ;YES, GET UNIT OF RIB
MOVE T1,UNINAM##(U) ;TELL USER UNIT NAME
DSKCH0: MOVSI S,CODDSK ;PRESUME ARG. TO BE "DSK". SET CODE ACCORDINGLY
PUSHJ P,DEVLG## ;SEARCH ALL LOGICAL NAMES IN SYSTEM FOR A MATCH
JRST DSKCHK ;NO MATCH - CHECK FOR "DSK"
MOVSI T2,DVDSK
TDNN T2,DEVMOD(F) ;IS IT A DISK?
JRST TPOPJ## ;NO - EXIT
MOVE T1,DEVNAM(F) ;PICK UP
;HERE TO SEE WHETHER C(T1) IS "DSK","DS" OR "D"
DSKCHK:
SETZ F, ;NO DDB
TLNN P1,PHONLY## ;DON'T MATCH IF PHYS ONLY
PUSHJ P,LNMTSN## ;PATHOLOGICAL DEVICE?
JRST DSKCH7 ;NO
MOVE P2,@.USLNM ;YES, GET ADDR OF 1ST FILESPEC
ADDI P2,LNMDEV##-LNRDEV##
DSKCH8: SKIPN T1,LNRDEV##(P2) ;DEVICE NAME
JRST DSKFND ;LAST SPEC, DON'T CRY
PUSHJ P,SDVTS1## ;ERSATZ DEVICE?
CAIA ;NO
JRST DSKCH9 ;YES, USE THIS FILESPEC
PUSHJ P,SRSTR ;IS STR MOUNTED?
PUSHJ P,ALIASD ;OR DEVICE "DSK"
JRST DSKCH2 ;YES, USE THIS FILESPEC
PUSHJ P,SRUNA ;UNIT NAME?
JRST DSKCH6 ;NO
JRST DSKCH2 ;YES
JRST DSKCH2 ;YES
DSKCH6: ADDI P2,LNRSFD## ;STEP TO NEXT FILESPEC
DSKCH5: SKIPE (P2)
AOJA P2,DSKCH5
AOJA P2,DSKCH8 ;AND TEST IF MOUNTED
DSKCH7:
PUSHJ P,SDVTS1## ;A SPECIAL DEVICE?
JRST DSKCH2 ;NO
DSKCH9: PUSHJ P,SDSRC ;GET SEARCH LIST
TRNN T1,-1 ;IS IT DEVX?
SKIPN P2,T3 ;NO, IS THERE AN IMPLIED SEARCH LIST?
JRST DSKCH1 ;NO, PRETEND IT'S DSK(X)
JRST DSKFN2 ;YES,GET 1ST STR IN THE LIST
DSKCH1: HRLI T1,'DSK'
DSKCH2:
CAME T1,[SIXBIT /NUL/] ;IS IT NUL?
JRST DSKCH3 ;NO
PUSHJ P,RTZER## ;YES, RETURN A ZERO IN AC
PJRST JPOPJ1## ;AND TAKE GOOD RETURN
DSKCH3: SETZ F, ;CLEAR F FOR ALIASD ROUTINE
PUSHJ P,ALIASD ;IS NAME AN ALIAS FOR "DSK"?
JRST DSKFND ;YES - FIND FIRST UNIT OF 1ST. STR FOR THIS JOB
MOVSI S,CODSTR ;PRESUME ARG. TO BE STR NAME
PUSHJ P,SRSTR ;DO ANY STR NAMES MATCH?
TLOA S,MCDLUF ;NO MATCH - PRESUME ARG. TO BE LOG. UNIT WITHIN STR
JRST FNDSTR ;DEPOSIT VALUES IN TABLE AND SETUP USER AC.
TRNE T1,-1 ;IF SOME TYPE OF UNIT NAME SPECIFIED,
SETO T2, ; SET MASK TO LOOK FOR EXACT MATCH
LOCSRU: PUSHJ P,SRUNA ;SCAN ALL PHYSICAL AND LOGICAL UNIT NAMES
JRST TPOPJ## ;NO MATCH - EXIT
JRST LOGCHK ;MATCH ON LOGICAL NAME
MOVSI S,CODKNC ;PRESUME KONTROLLER CLASS (1 OR 2 CHARS)
TLNE T1,77 ;3 CHARACTERS?
MOVSI S,CODKON ;YES, PRESUME KONTROLLER NAME
TRNE T1,-1 ;MORE THAN 3 CHARACTERS?
MOVSI S,CODPUN ;YES, PHYSICAL UNIT NAME
JRST FNDUNI ;DEPOSIT VALUE IN TABLE AND SETUP USER AC.
;HERE WHEN ARG. WAS OR IMPLIED "DSK" TO FIND FIRST UNIT OF JOB'S FIRST FILE STRUCTURE
DSKFND: PUSHJ P,SLPTR ;P2=JOB SL.PTR.
SKIPA ;OR IF NO JOB SL., USE SYS.SL.
DSKFN2: PUSHJ P,SLITA ;T1=NEXT FSN.
JRST [ ;USE SYS.SL IF JOB SL.IS EMPTY
MOVE P2,SYSSRC##
PUSHJ P,SLGTA
PUSHJ P,SLXESS ;STOPCD ESS IF EMPTY SYS.SL.
JRST .+1
]
HRRZ T3,TABSTR##(T1) ;GET STR DATA BLOCK ADR
JUMPE T3,DSKFN2 ;ERROR RETURN IF STR REMOVED
HLRZ U,STRUNI##(T3) ;GET UNIT DB LOC OF 1ST UNIT IN STR
JRST FNDSTR ;DEPOSIT VALUES IN TABLE AND SETUP USER AC.
;SUBROUTINE TO TEST IF A NAME IS AN ALIAS FOR "DSK"
;ENTER WITH NAME IN T1, F=ADR OF DDB OR 0 IF NO DDB
;EXIT NAME IN T1, MASK IN T2
;RETURN CPOPJ IF NAME IS AN ALIAS FOR "DSK", CPOPJ1 OTHERWISE
ALIASD::PUSHJ P,MSKUNI ;GENERATE MASK IN T2 FROM # OF CHARS. IN T1
MOVSI T3,(SIXBIT .DSK.)
AND T3,T2 ;MASK OUT SUPERFLUOUS CHARS
IFN FTSPL,<
SKIPE F ;DONT CHECK SPOOL-MODE IF NO DDB
SKIPL DEVSPL(F) ;IF IN SPOOL MODE
>
CAMN T1,T3 ;OR MATCH ON "D", "DS" OR "DSK"
POPJ P, ;RETURN CPOPJ IF A MATCH
PJRST CPOPJ1## ;NO MATCH - SKIP RETURN
;HERE WHEN A MATCH IS FOUND BETWEEN LOGICAL NAME(UNILOG) & C(T1)
LOGCHK: CAME T1,UNILOG##(U) ;EXACT MATCH WITH LOGICAL UNIT NAME?
MOVSI S,CODSFS ;NO - MUST BE SUBSET OF STRS
FNDUNI: HRRZ T3,UNISTR##(U) ;PICK UP ADDRESS OF STR THIS UNIT IS IN
SKIPN T3 ;IF UNIT NOT IN F.S.
MOVEI T3,STRDB## ; ADDRESS PROTOTYPE F.S.
FNDSTR: MOVE T1,UNIDES##(U) ;LOAD UP BITS FOR USER AC.
TLZ T1,37 ;CLEAR EXTRANEOUS BITS
IOR T1,S ;"OR" IN ARG. TYPE CODE.
SKIPN STRMNT##(T3) ;IS UNIT MEMBER OF STR WITH 0 MOUNT COUNT?
TLO T1,UNPZMT## ;YES - FLAG IT
SKIPLE STRJOB##(T3) ;IS F.S. SINGLE ACCESS?
TLO T1,UNPSAF## ;YES -- SET BIT
MOVE J,.CPJOB## ;JOB # FOR WRPCK
PUSHJ P,WRPCK ;IS UNIT A MEMBER OF A STR THAT
; IS SOFTWARE WRITE PROTECTED?
TLO T1,UNPSWP## ;YES - FLAG IT
;T4 = FSN # OR -1 IF NOT IN AN STR
IFN FTDUAL,<
SKIPE UNI2ND##(U) ;SKIP IF NOT DUAL PORTED
TLO T1,UNPALT## ;SET BIT IF ALTERNATE PATH
>
IFN FTPSTR,<
MOVE T2,STRPVS##(T3) ;WORD CONTAINING PRIVATE F.S. BIT
TRNE T2,STPPVS## ;IS THIS A PRIVATE F.S.?
TLO T1,UNPPRF## ;YES, INDICATE THAT TO THE CALLER
>
MOVE P1,T3 ;PRESERVE LOC OF STR
IFN FTMP,<
PUSH P,T1 ;SAVE VALUE SO FAR
MOVE T1,UNICAM##(U) ;GET CPU ACCESSIBILITY MASK
PUSHJ P,CAMCPU## ;PICK A CPU NUMBER
MOVE T2,.C0CPN##(T4) ;FETCH ITS CPU NUMBER
POP P,T1 ;RESTORE VALUE SO FAR
DPB T2,[POINT 2,T1,13] ;FOR THE USER
>
POP P,J ;RESTORE USER ARG
PUSHJ P,STOTAC## ;EITHER STR NONEXISTANT OR NO WRITE PROTECT
;STORE BITS IN USER AC.
AOBJP J,CPOPJ1## ;IS LENGTH .GT. 1?
MOVSI T2,MATLEN ;SETUP LENGTH & INDEX INTO ARGTAB
ARGLUP: XCT ARGTAB(T2) ;GET NEXT VALUE FOR USER TABLE
PUSHJ P,PUTWD1## ;DEPOSIT IN TABLE
AOBJP J,CPOPJ1## ;FINISHED?
AOBJN T2,ARGLUP ;NO INCREMENT INDEX
JRST CPOPJ1## ;RETURN
ARGTAB: PUSHJ P,GUFBT ;LOC+1(.UFTAL)
MOVE T1,STRTAL##(P1) ;LOC+2(.STTAL)
MOVE T1,UNITAL##(U) ;LOC+3(.UNTAL)
MOVE T1,STRNAM##(P1) ;LOC+4(.STNAM)
MOVE T1,UNICHR##(U) ;LOC+5(.UNCHR)
MOVE T1,UNIBPU##(U) ;LOC+6(.UNBPU)
MOVE T1,STRMNT##(P1) ;LOC+7(.STMNT)
LDB T1,UNYWPS## ;LOC+10(.UNWPS)
LDB T1,UNYSPU## ;LOC+11(.UNSPU)
LDB T1,UNYK4S## ;LOC+12(.UNK4S)
MOVE T1,STRJOB##(P1) ;LOC+13(.STJOB)
MOVE T1,UNILOG##(U) ;LOC+14(.UNLOG)
MOVE T1,UNINAM##(U) ;LOC+15(.UNNAM)
MOVE T1,UNIHID##(U) ;LOC+16(.UNHID)
MOVE T1,UNISLB##(U) ;LOC+17(.UNSLB)
MOVE T1,UNIBPM##(U) ;LOC+20(BLOCKS PER UNIT INC. MAINT.)
MOVE T1,UNICYL##(U) ;LOC+21(CURRENT CYLINDER)
MOVE T1,UNIBUC##(U) ;LOC+22
MOVE T1,UNIQUL##(U) ;LOC+23
PUSHJ P,[HRRZ T1,UNICHN##(U) ;LOC+24
MOVE T1,CHNQUL##(T1)
POPJ P,0]
IFN FTDUAL,<
PUSHJ P,[SKIPE T1,UNI2ND##(U) ;LOC+25 GETS...
MOVE T1,UNINAM##(T1) ;UNIT NAME FOR ALTERNATE PORT
POPJ P,0] ; OR 0 IF NONE
>
IFE FTDUAL,<
SETZ T1,
>
IFN FTPSTR,<
MOVE T1,STRPPN##(P1) ;LOC+26 (OWNER PPN)
>
IFE FTPSTR,<
SETZ T1, ;LOC+26
>
PUSHJ P,FNDSWP ;LOC+27 POSITION IN ACTIVE SWAPPING LIST
PUSHJ P,[SKIPL T1,STRSDL##(P1) ;LOC+30 POSITION IN SYSTEM DUMP LIST
AOJ T1,
POPJ P,]
HLRZ T1,STRBSC##(P1) ;LOC+31 BLOCKS PER SUPERCLUSTER
PUSHJ P,GETXCH ;LOC+32 EXTENDED UNIT CHARACTERISTICS
IFN FTDUAL,<
PUSHJ P,[HRRZ T1,UNIALT##(U) ;LOC+33 GETS NAME OF DETACHED PORT
SKIPE T1
MOVE T1,UNINAM##(T1)
POPJ P,]
>
IFE FTDUAL,<
SETZ T1,
>
PUSHJ P,[HLRZ T1,UNISTR##(U) ;LOC+34 GET NAME OF NEXT UNIT IN STR
SKIPE T1
MOVE T1,UNINAM##(T1)
POPJ P,]
MOVE T1,UNIBRC##(U) ;LOC+35 USER BUFFERED READS
MOVE T1,UNIBWC##(U) ;LOC+36 USER BUFFERED WRITES
MOVE T1,UNIDRC##(U) ;LOC+37 USER DUMP READS
MOVE T1,UNIDWC##(U) ;LOC+40 USER DUMP WRITES
MOVE T1,UNIMRC##(U) ;LOC+41 MONITOR READS
MOVE T1,UNIMWC##(U) ;LOC+42 MONITOR WRITES
MOVE T1,UNIICT##(U) ;LOC+43 SWAP READS
MOVE T1,UNIOCT##(U) ;LOC+44 SWAP WRITES
MOVE T1,UNIPCI##(U) ;LOC+45 PAGE READS
MOVE T1,UNIPCO##(U) ;LOC+46 PAGE WRITES
MOVE T1,UNIFKS##(U) ;LOC+47 FREE SWAPPING SPACE LEFT
MOVE T1,UNICBK##(U) ;LOC+50 DISK CACHE BLOCKS IN USE
MOVE T1,UNICRC##(U) ;LOC+51 DISK CACHE READS
MOVE T1,UNICRH##(U) ;LOC+52 DISK CACHE READ HITS
MOVE T1,UNICWC##(U) ;LOC+53 DISK CACHE WRITES
MOVE T1,UNICWH##(U) ;LOC+54 DISK CACHE WRITE HITS
HLRZ T1,UNISCT##(U) ;LOC+55 COUNT OF SOFT DEVICE/SEARCH ERRORS
HRRZ T1,UNISCT##(U) ;LOC+56 COUNT OF SOFT DATA ERRORS
HLRZ T1,UNIHCT##(U) ;LOC+57 COUNT OF HARD DEVICE/SEARCH ERRORS
HRRZ T1,UNIHCT##(U) ;LOC+60 COUNT OF HARD DATA ERRORS
HRRZ T1,UNIECT##(U) ;LOC+61 COUNT OF RETRIES ON LAST ERROR
LDB T1,[POINT 12,UNIMCT##(U),11] ;LOC+62 COUNT OF "SAT" ERRORS
LDB T1,[POINT 12,UNIMCT##(U),23] ;LOC+63 COUNT OF "RIB" ERRORS
LDB T1,[POINT 12,UNIMCT##(U),35] ;LOC+64 COUNT OF CHECKSUM ERRORS
MOVE T1,UNIHBN##(U) ;LOC+65 LOGICAL BLOCK NUMBER OF ERROR
MOVE T1,UNIERR##(U) ;LOC+66 LAST ERROR STATUS
MOVE T1,UNISOF##(U) ;LOC+67 LAST ERROR STATUS
MOVE T1,UNIHDI##(U) ;LOC+70 LAST ERROR STATUS
MOVE T1,UNISDI##(U) ;LOC+71 LAST ERROR STATUS
LDB T1,[POINT 9,UNIHNG##(U),08] ;LOC+72 TRANSFER HUNG, NO RECOVERY
LDB T1,[POINT 9,UNIHNG##(U),17] ;LOC+73 TRANSFER HUNG ERRORS
LDB T1,[POINT 9,UNIHNG##(U),26] ;LOC+74 POSITION HUNG ERRORS
LDB T1,[POINT 9,UNIHNG##(U),35] ;LOC+75 SOFTWARE HUNG ERRORS
MATLEN==ARGTAB-. ;ADD NEW ENTRIES TO TABLE HERE
;SUBROUTINE TO COMPUTE TOTAL RESERVE+FCFS BLOCKS IN A UFD
;CALL P1 STR.DB.ADDR. (STRDB## IF NOT IN FS.)
;NOSKIP T1= # FREE+PRESERVED BLOCKS LEFT IN THE UFB
;RESPECTS CONTENTS OF T2
GUFBT: SETZ T1, ;ASSUME 0 IF UNIT NOT IN AN STR
MOVE T3,P1 ;STR DATA BLOCK
CAIN T3,STRDB## ;PROTOTYPE DB.? (IE. NOT IN FS.?)
POPJ P, ;YES-RETURN 0
MOVE T1,.CPJOB## ;T1=JOB NUMBER
MOVE T1,JBTPPN##(T1) ;GET PROJ-PROG # FOR THIS JOB
GUFBT0: HRRZ T4,STRFSN##(T3) ;GET # OF THIS STRUCTURE
MOVE T3,T1 ;SAVE PPN FOR MATCH
HLRZ T1,SYSPPB## ;GET ADR. OF 1ST. PPB IN SYSTEM
CAIA
GUFBT1: HLRZ T1,CORLNK##(T1) ;GET ADR. OF NEXT PPB
JUMPE T1,GUFBT3 ;NONE LEFT - RETURN WITH T1=0
CAME T3,PPBNAM##(T1) ;IS THIS PPB # SAME AS JOB'S?
JRST GUFBT1 ;NO - REPEAT
HLRZ T1,PPBUFB##(T1) ;YES - GET ADR. OF 1ST. UFB IN PPB
CAIA
GUFBT2: HLRZ T1,CORLNK##(T1) ;GET ADR. OF NEXT UFB IN PPB
JUMPE T1,GUFBT3 ;NONE LEFT - RETURN WITH T1=0
LDB T3,COZFSN## ;GET FSN # FOR THIS UFB
CAME T3,T4 ;IS IT THE SAME AS THIS FSN #?
JRST GUFBT2 ;NO - REPEAT
SKIPA T1,UFBTAL##(T1) ;YES - GET # FREE + RESERVED BLOCKS LEFT IN THIS UFB
GUFBT3: TLO T1,400000 ;RETURN MOST NEGATIVE NUMBER IF NO UFB BLOCK
HRRZ T3,TABSTR##(T4)
POPJ P, ;GO DEPOSIT IT IN TABLE
;HERE TO DO DISK. TO RETURN UFBTAL FOR ARBITRARY
; STR:[,PN]
; M/ USER ADRS OF 2 WORD ARG BLOCK (STR,PPN)
; CPOPJ - ILLEGAL STR NAME GIVEN
; CPOPJ1 - USER'S AC HAS UFBTAL OR 1B0 (UFB UNKNOWN)
;ERROR CODES:
.ERISS==1 ;NO FS BY THAT NAME
ERCODE DUFISS,.ERISS
GGUFBT::
PUSHJ P,GETWDU## ;GET USER ARG 1: STR NAME
PUSHJ P,SRSTR ;FIND IT'S DATA BLOCK
JRST DUFISS ;ILLEGAL STR NAME
PUSHJ P,GETWD1## ;GET DESIRED PPN
PUSHJ P,GUFBT0 ;SEARCH PPBS, UFBS
PUSHJ P,STOTAC## ;GIVE THAT TO USER.
JRST CPOPJ1## ;WIN
;SUBROUTINE TO SEE WHETHER A FILE STRUCTURE IS SOFTWARE WRITE PROTECTED FOR THIS JOB
;CALLED AT UUO LEVEL ONLY
;CALL MOVE T3,STR ADR. (OR STRDB## SIGNIFING 'NOT IN FS.')
; MOVE J,JOB # ;USE 0 FOR SYS.SRC.LST
; PUSHJ P,WRPCK
; WRITE PROTECTED
; NOT WRITE PROTECTED OR STR NOT FOUND
;T1 & T3 ARE RESPECTED, MODIFIES T2,P2
WRPCK: PUSH P,T1
CAIE T3,STRDB## ;SKIP RETURN IF THIS IS THE PROTOTYPE DB.
PUSHJ P,SLPTR ;P2=SL.PTR.
JRST TPOPJ1## ;SKIP RETURN IF NO SUCH SL.
HRRZ T1,STRFSN##(T3) ;T1=FSN.
PUSHJ P,SLFNA
JRST TPOPJ1## ;SKIP RETURN IF NOT IN SL.
PUSHJ P,SLGTB ;GET FS. BITS
TRNN T2,FS.WLK ;NOSKIP RETURN IF BIT IS ON
AOS -1(P)
JRST TPOPJ##
;SUBROUTINE TO FIND THE POSITION OF A UNIT IN THE ACTIVE SWAPPING
;LIST (AS OPPOSED TO THE OFFSET IN SWPTAB).
;CALL MOVE U,UDB ADDRESS
; PUSHJ P,FNDSWP
; RETURN HERE ALWAYS WITH POSITION IN T1
;RESPECTS T2 AND T3
FNDSWP: MOVEI T1,0 ;SETUP POSITION
MOVSI T4,MSWPMX## ;GET AOBJN POINTER TO SWPTAB
FNDSW1: SKIPN SWPTAB##(T4) ;THIS ENTRY EMPTY?
JRST FNDSW2 ;YES
CAMN U,SWPTAB##(T4) ;MATCH?
POPJ P, ;YES, RETURN WITH POSITION IN T1
AOS T1 ;INCREMENT POSITION
FNDSW2: AOBJN T4,FNDSW1 ;LOOP FOR ENTIRE TABLE
JRST M1POPJ## ;NOT THERE, RETURN -1
;SUBROUTINE TO RETURN EXTENDED CHARACTERISTICS WORD FOR A UNIT
;CALL MOVE U,UDB ADDRESS
; PUSHJ P,GETXCH
;RETURNS CHARACTERISTICS WORD IN T1
GETXCH: PUSHJ P,SAVE2## ;FREE UP P1-P2
MOVE T1,UNICAM##(U) ;GET CPU ACCESSIBILITY MASK
ANDI T1,CPUMSK## ;KEEP JUST 6 BITS WORTH
HRRZ P1,UNICHN##(U) ;GET CHN ADDRESS
LDB P2,UNYPUN## ;PHYSICAL UNIT NUMBER
DPB P2,[POINT 9,T1,26] ;STORE IT
LDB P2,UNYKNM## ;KONTROLLER NUMBER
DPB P2,[POINT 9,T1,17] ;STORE IT
LDB P2,CHYSCN## ;SOFTWARE CHANNEL NUMBER
DPB P2,[POINT 9,T1,8] ;STORE IT
POPJ P, ;RETURN
;SUBROUTINE TO SEARCH FILE STRUCTURE NAMES FOR A MATCH WITH C(T1)
;CALL MOVE T1,SIXBIT NAME OF FILE STRUCTURE, UNIT, KONTROLLER, ETC.
; PUSHJ P,SRSTR
; NON MATCH RETURN T1 & T2 ARE RESPECTED.
; MATCH RETURN T1 & T2 ARE RESPECTED, T3 IS ADR. OF STR.
; U IS ADR. OF THE FIRST UNIT IN STR.
SRSTR:: MOVE T4,STRAOB## ;PICK UP NEG. # OF STR'S IN SYSTEM
LUPSTR: SKIPLE T3,TABSTR##(T4) ;DOES STR CURRENTLY EXIST?
CAME T1,STRNAM##(T3) ;YES - DOES ARG. MATCH NAME
AOBJN T4,LUPSTR ;NO
JUMPGE T4,CPOPJ## ;DID WE FIND A MATCH?
HLRZ U,STRUNI##(T3) ;YES - PICK UP ADR. OF FIRST UNIT IN STR
JRST CPOPJ1## ;FOUND A MATCH IN STR RETURN
;SUBROUTINE TO SEARCH ALL UNITS, INCLUDING SECOND PORTS, FOR A MATCH
; SAME CALL AS TO SRUNI, SAME RETURN IF A "REAL" MATCH
;IF A MATCH ON A 2ND PORT RETURNS CPOPJ2 WITH LH(U) = -1
SRUNA:: PUSHJ P,SRUNI ;TRY "REAL" UNITS FIRST
JRST .+3 ;NO MATCH
JRST CPOPJ1## ;LOGICAL NAME MATCH
JRST CPOPJ2## ;PHYSICAL UNIT MATCH
IFN FTDUAL,<
HLRZ U,SYSUNI## ;START AT 1ST UNIT
SRUNA1: SKIPN T4,UNI2ND##(U) ;GET POINTER TO SECONDARY UDB
JRST SRUNA2 ;THERE IS NONE
MOVE T3,UNINAM##(T4) ;GET UNIT NAME
AND T3,T2 ;MASK DOWN
CAME T1,T3 ;MATCH?
JRST SRUNA2 ;NO
HRROI U,(T4) ;YES, SET LH(U)=-1 AS A FLAG
JRST CPOPJ2## ;AND TAKE FOUND-RETURN
SRUNA2: HLRZ U,UNISYS##(U) ;NO MATCH, TRY NEXT
JUMPN U,SRUNA1
>
MOVEI U,SYSDET##-UNISYS## ;PRESET PREDECESSOR
SRUNA3: HLRZ U,UNISYS##(U) ;GET NEXT DETACHED UNIT
JUMPE U,CPOPJ## ;RETURN IF END OF LIST
MOVE T3,UNINAM##(U) ;GET PHYSICAL UNIT NAME
AND T3,T2 ;MASK
CAME T1,T3 ;MATCH?
JRST SRUNA3 ;NO
HRROS U ;SET LH(U)=-1 AS A FLAG
JRST CPOPJ2## ;AND TAKE FOUND-RETURN
;SUBROUTINE TO SEARCH UNIT DATA BLOCKS FOR A MATCH BETWEEN C(T1)
;AND AN EQUIVALENT NUMBER OF CHARACTERS OF UNILOG AND UNINAM
;CALL MOVE T2,MASK
; MOVE T1,SIXBIT NAME OF FILE STRUCTURE,UNIT,KONTROLLER, ETC.
; PUSHJ P,SRUNI
; NON MATCH RETURN T1 & T2 ARE RESPECTED. U IS 0
; LOGICAL NAME MATCH T1 & T2 ARE RESPECTED. U IS THE ADR. OF UNIT DATA BLOCK.
; PHYSICAL NAME MATCH
;RETURNS T4 = PREDECESSOR
SRUNI:: HLRZ U,SYSUNI## ;GET ADR. OF FIRST UNIT IN SYSTEM
MOVEI T4,DIFUSY## ;PRESET PREDECESSOR
CAME T1,[SIXBIT /DF/] ;SPECIAL DISK?
CAMN T1,[SIXBIT /DC/] ;...
HRLI T1,'FH ' ;YES, MAKE INTO A "FH"
LUPUNI: MOVE T3,UNINAM##(U) ;GET PHYSICAL UNIT NAME
AND T3,T2 ;MASK
CAMN T1,T3 ;MATCH?
JRST CPOPJ2## ;YES - FOUND A PHYSICAL UNIT MATCH RETURN
MOVE T3,UNILOG##(U) ;GET LOGICAL UNIT NAME WITHIN STR
AND T3,T2 ;MASK OUT UNWANTED CHARS.
CAMN T1,T3 ;MATCH?
JRST CPOPJ1## ;YES - FOUND A LOGICAL UNIT MATCH RETURN
SRUNX: MOVE T4,U
HLRZ U,UNISYS##(U) ;GET ADR. OF NEXT UNIT IN SYSTEM
JUMPN U,LUPUNI ;LAST ONE?
POPJ P, ;YES - RETURN
SUBTTL COMMON SEARCH LIST ROUTINES
REPEAT 0,<
ALL SL.ACCESS AND MODIFICATION IS DONE ONLY WITH THE FOLLOWING ROUTINES.
I.E. THE REST OT THE MONITOR DOES NOT KNOW HOW SL.S ARE IMPLIMENTED.
THE ONLY FACTS THE REST OF THE MONITOR IS ALLOWED TO ASSUME ARE:
0 IS NEVER A LEGAL FSN. OR MARKER.
.FSMIN,...,.FSMAX ARE THE LEGAL FSN.S.
.FSFNC IS THE CODE FOR THE 'FENCE'.
.FSXX1 IS A GENERAL PURPOSE MARKER: SAME SIZE BYTE AS AN FSN BUT IS GUARENTEED NOT TO BE
AN FSN. .FSXX1 MUST NEVER BE PUT INTO A SL.
SOME OF THESE ROUTINES DEPEND ON SPECIFIC PARAMETR ASSIGNMENTS,
GRATUITOUS FEATURES OF THE INSTRUCTION SET, ETC. SUCH DEPENDENCIES
ARE LISTED BELOW:
1. .FSMAX LESSTHAN .FSFNC LESSTHAN .FSEND LESSTHAN .FSSTP
2. A 'PRE-DECREMENTED' POINTER (ONE WHICH IS ILDB'D TO GET
THE 1ST BYTE SUCH AS 'POINT X,0') HAS SIGN BIT ON
AND ALL OTHER POINTERS HAVE SIGN BIT OFF. AS A CONSEQUENCE,
SL. BYTE SIZE (.FSSIZ) MUST BE .GE. 5 (I.E 'POINT 4,0,3'
IS NOT PRE-DECREMENTED BUT SIGN BIT IS ON).
GENERAL PHILOSOPHY, CONVENTIONS, ETC
1. AC ARGUMENTS ARE STANDARDIZED:
P2 SL. POINTER (OF COURSE OUTSIDE ROUTINES DONT
KNOW ITS A BYTE POINTER AND MUST NOT USE IT
AS SUCH)
T1 FSN.
T2 FS. STATUS BITS (NCR,WLK,ETC)
J .CPJOB## NUMBER IF NON-0. IF 0, IT SIGNIFIES SYS.SL.
F DDB ADDRESS
2. IN GENERAL ALL AC.S ARE PRESERVED.
> ;END REPEAT 0
REPEAT 0,<
3. THOSE ROUTINES WHICH CREATE A BYTE POINTER (SLPTR, ETC)
RETURN A PRE-DECREMENTED POINTER SO THAT IT IS EASY TO
'FALL' INTO SL. INCREMENTING LOOPS. FOR CONVENIENCE, ALL
ROUTINES, WHETHER OR NOT THEY INCREMENT THE SL. POINTER, GET OR PUT
THE 1ST ITEM IF CALLED WITH A PRE-DECREMENTED POINTER. HENCE
THE FOLLOWING ARE EQUIVALENT (RETURNS 1ST FSN.):
PUSHJ P,SLPTR PUSHJ P,SLPTR
JRST ERROR JRST ERROR
PUSHJ P,SLIGT ;1ST PUSHJ P,SLGET ;1ST
NOTE----THE FOLLOWING ARE NOT EQUIVALENT:
PUSHJ P,SLPTR PUSHJ P,SLPTR
JRST ERROR JRST ERROR
PUSHJ P,SLINC ;1ST PUSHJ P,SLINC ;1ST
JRST EMPTY JRST EMPTY
PUSHJ P,SLIGT ;2ND PUSHJ P,SLGET ;1ST AGAIN
> ;END REPEAT 0
E$$BTS: IFL .FSSIZ-5,<PRINTX %FILFND:E$$BTS: .FSSIZ MUST BE .GE. 5>
;SUBROUTINES THAT CREATE SL.PTR'S
;SUBROUTINE TO MAKE SL.PTR. FOR JOB OR SYS DEPENDING ON J.
;
;CALL J .LT. OR= 0: SYS.SL.
; .GT. 0: JOB SL. FOR J
;NOSKIP NEVER IF CALLED WITH J=0
; ELSE P2 = 0: NO SUCH (ACTIVE) JOB
; NOT= 0: NULL SL. (NOT SAME AS EMPTYSL.)
; E.G. LOGIN HASNT CREATED SL. YET.
; P2=PTR. TO NULL SL. (CALL SLINI).
;SKIP P2 SL. PTR.
;
;NOTE SL.PTR.S ARE ABSOLUTE (NO INDEXING OR INDIRECTION). OBVIOUSLY
; THIS WONT WORK IF PDB'S ARE EVER MOVED (OR SWAPPED).
;CHANGES P2
SLPTR:: JUMPE J,[ ;J=0 FOR SYS.SL.
MOVE P2,SYSSRC##
PJRST CPOPJ1##
]
PUSH P,W
PUSHJ P,FNDPDB## ;W=PDB ADR.
JRST [ ;IF NO PDB, NOSKIP RETURN WITH P2=0
SETZ P2,
JRST WPOPJ##
]
MOVEI P2,@JOBSRC## ;MAKE ABSOLUTE PTR TO SL. IN PDB.
HLL P2,JOBSRC## ; ...
TLZ P2,77 ; ...
SKIPE (P2) ;IF NULL SL. NON-SKIP
AOS -1(P) ; ELSE SKIP RETURN
PJRST WPOPJ## ;RESTORE W
;SUBROUTINE TO RETURN SL.PTR. FOR CURRENT DDB'S JOB.
; SIMILAR TO SLPTR EXCEPT USES PJOBN INSTEAD OF J. AND STOPCDS
; ON ANY NON-VALID JOB SL.
;CALL F DDB ADDRESS
;NOSKIP IF PJOBN=0 OR NULL SL
; P2 SL.PTR. FOR DDB'S JOB'S SL.
;
;STOPCD NSL IF PJOBN GIVES 0, NO SUCH JOB (PDB), OR NULL SL.
;CHANGES P2
SLPRJ: PUSH P,J
LDB J,PJOBN##
SKIPE J ;STOPCD ON NO JOB NUM.
PUSHJ P,SLPTR
SOS -1(P) ;NO PDB OR NULL ST
JRST JPOPJ1##
;SUBROUTINE TO RETURN SL.PTR. IN T1 FOR CURRENT DDB'S JOB.
; SIMILAR TO SLPTRJ EXCEPT RETURNS POINTER IN T1 INSTEAD OF P2
;CALL F DDB ADDRESS
;NOSKIP IF PJOBN=0 OR NULL SL
; T1 SL.PTR. FOR DDB'S JOB'S SL.
;
;CHANGES P2
SLPTJ:: MOVE T1,P2
PUSHJ P,SLPRJ
SOS (P) ;NO S.L.
EXCH T1,P2
JRST CPOPJ1##
;SUBROUTINE TO PICK A SL.PTR. FOR A DDB.
; SIMILAR TO SLPTRJ EXCEPT RETURN SYS.SL. IF 'SYSDEV' BIT
; IS ON IN F, OR NULL JOB SL.
;
;CALL F DDB ADDR. (RETURN SYS.SL. IF SYSDEV=1)
;NOSKIP ALWAYS
; P2 JOB OR SYS SL.PTR.
;CHANGES P2
SLPRF: PUSH P,J
LDB J,PJOBN##
TLNE F,SYSDEV ;FORCE SYS.SL. IF SYSDEV=1
SLPTF2: SETZ J,
PUSHJ P,SLPTR
JRST SLPTF2 ;USE SYS.SL.
JRST JPOPJ##
;SUBROUTINE TO CREATE A TEMPORARY (WORK) SL. AND RETURN ITS PTR.
;
;CALL T2 MINIMUM NUM.OF FSN.S (EXCLUDING FENCE) TO ACCOMMODATE
; (MAY BE CREATED LARGER)
;NOSKIP NOT ENOUGH FREE CORE.
;SKIP P2 PTR. TO CREATED, EMPTY SL.
; T2 MODIFIED
;
;NOTE TEMPORARY SL.S ARE CREATED IN MONITOR 'FREE CORE' AND HENCE
; MUST BE 'RETURNED' AFTER USE BY CALLING SLGVT.
; TEMP.SL.S ARE MARKED WITH A SPECIAL CODE (.FSTMP) TO DESTINGUISH
; THEM FROM THOSE THAT SHOULD NOT BE 'RETURNED'. GET AND PUT
; ROUTINES IGNORE THIS CODE.
; SLGVT WILL NOT RETURN A SL. WHICH DOESNT HAVE THIS CODE,
; THEREFORE SLGVT MAY BE CALLED WHEN YOU 'MIGHT' HAVE A TEMPORARY
; SL. BUT ARE NOT SURE.
;
; THE SL. PROPER STARTS IN THE 2ND WORD OF THE FREE BLOCK,
; THE LENGTH OF THE BLOCK IS STORED IN THE 1ST WORD FOR SLGVT.
;CHANGES P2
SLPRT: PUSH P,T1
PUSH P,T2
ADDI T2,<.SLIPW-1>+3 ;+3 FOR TMP,FNC, & STP
IDIVI T2,.SLIPW
AOS P2,T2 ;+1 FOR STORED WD.COUNT, P2=T2=NUM.WDS.TO GET
PUSHJ P,GETWDS##
PJRST TTPOPJ## ;NOSKIP IF NO FREE CORE
MOVEM P2,(T1) ;SAVE WD.COUNT IN 1ST WORD
MOVEI T2,-1(P2) ;T2=NUM.WDS.TO CLEAR
AOS P2,T1 ;P2=T1=1ST WD. OF SL.
SLPTT1: SETZM (T1) ;REMOVE ANY POSSIBLE STP MARKERS
AOS T1
SOJG T2,SLPTT1
MOVEI T2,.FSSTP ;PUT STP MARKER AT END
DPB T2,[POINT .FSSIZ,-1(T1),.SLPSE]
MOVEI T2,.FSTMP ;PUT TMP MARKER AT BEGINING
DPB T2,[POINT .FSSIZ,(P2),.SLPSB]
HRLI P2,(POINT .FSSIZ) ;P2=PRE-DECREMENTED POINTER
PUSHJ P,SLINI ;INIT AS EMPTY
PJRST TTPPJ1 ;SKIP RETURN
;SUBROUTINE TO RETURN TEMP.SL. TO FREE STORAGE.
; MAY BE CALLED WHETHER OR NOT SL. IS KNOWN TO BE TEMPORARY.
;
;CALL P2 SL.PTR.
;NOSKIP ALWAYS SL. RETURNED IF IT WAS A TEMP.
; P2 MODIFIED
;CHANGES P2, RESPECTS T1,T2
SLGVT:: PUSH P,T1
SKIPGE P2 ;UNPREDECREMENT
IBP P2
LDB T1,P2 ;TEMP.SL.?
CAIE T1,.FSTMP
JRST TPOPJ## ;NO-RETURN
PUSH P,T2
MOVEI T2,-1(P2) ;YES-T2=ADDR.1ST WORD
MOVE T1,(T2) ;T1=WORD COUNT
PUSHJ P,GIVWDS##
PJRST TTPOPJ##
;SUBROUTINES TO GET AND PUT FSN.S AND BITS
;SUBROUTINE TO GET FSN. SL.PTR. IS CURRENTLY POINTING TO
;
;CALL P2 SL.PTR.
;NOSKIP END OF LIST (PHYSICAL OR LOGICAL)
; P2 POINTS TO END MARKER (INTERNAL USE ONLY--IE. SL???? ROUTINES)
; T1 END MARKER (.FSEND OR .FSSTP) (INTERNAL USE ONLY)
;SKIP T1 FSN.
; P2 MAY BE MODIFIED BUT 'POINTS' TO THE SAME FSN.
;CHANGES P2, RESPECTS T4
SLGET: SKIPGE P2 ;UNPREDECREMENT
SLGET2: IBP P2
HRRZ T1,P2
CAIN T1,.PDJSE##(W) ;IF JUST WENT PAST TOP OF S.L.
JRST [MOVEI T1,.FSSTP ; RETURN PHYSICAL END
POPJ P,]
LDB T1,P2
ANDI T1,FS.NMK ;REMOVE STATUS BITS
CAIN T1,.FSTMP ;IGNORE TEMP.SL. MARKERS
JRST SLGET2
CAIL T1,.FSEND ;END?
POPJ P, ;YES-NOSKIP
PJRST CPOPJ1## ;NO-SKIP
;SUBROUTINE TO GET FS.BITS FOR CURRENT FSN.
;
;CALL P2 SL.PTR.
;NOSKIP ALWAYS
; T2 BITS (.FSNCR=NOCREATE, .FSWLK=SOFT.WRITE LOCK)
; (=0 IF END OF LIST)
; P2 MAY BE MODIFIED BUT 'POINTS' TO SAME FSN.&B ITS
;CHANGES P2, RESPECTS T1
SLGTB: PUSH P,T1
PUSHJ P,SLGET
TDZA T2,T2
LDB T2,P2
ANDI T2,FS.BMK
PJRST TPOPJ##
;SUBROUTINE TO INCREMENT THE SL.PTR.
;
;CALL P2 SL.PTR.
;NOSKIP PTR.POINTS TO END (LOGICAL OR PHYSICAL) BEFORE INCREMENTATION.
; P2 POINTS TO END MARKER (INTERNAL USE ONLY)
; T1 END MARKER (INTERNAL USE ONLY)
;SKIP P2 POINTS TO NEXT FSN.
;CHANGES P2, RESPECTS T4
SLINC: PUSH P,P2
PUSHJ P,SLGET ;FIX PTR. AND CK FOR END
JRST SLINC3
SKIPL (P) ;DONT IBP IF WAS A PREDECREMENTED PTR.
IBP P2
AOS -1(P)
SLINC3: POP P,(P)
POPJ P,
;SUBROUTINE TO GET NEXT FSN. IN SL.
; SIMILAR TO SLGET EXCEPT PTR. IS INCREMENTED FIRST.
;
;CALL P2 SL.PTR.
;NOSKIP END OF SL. (EITHER BEFORE OR AFTER INCREMENTATION)
;SKIP P2 INCREMENTED PTR.
; T1 FSN.
;CHANGES P2
SLIGT: PUSHJ P,SLINC
POPJ P,
PJRST SLGET
;SUBROUTINE TO GET CURRENT FSN. IN ACTIVE LIST ONLY
; SIMILAR TO SLGET EXCEPT NOSKIP IF FENCE ENCOUNTERED
;
;CALL P2 SL.PTR.
;NOSKIP END OF ACTIVE LIST
;SKIP T1 FSN.
; P2 MAY BE MODIFIED BUT POINTS TO SAME FSN.
;CHANGES P2
SLGTA: PUSHJ P,SLGET
POPJ P,
CAIE T1,.FSFNC ;FENCE?
AOS (P) ;NO-SKIP
POPJ P,
;SUBROUTINE TO GET CURRENT FSN. OR STOPCD
; SIMILAR TO SLGTA EXCEPT STOPCD'S IF END OF LIST
;
;CALL P2 SL.PTR.
;NOSKIP ALWAYS T1=FSN.
;
;STOPCD AES IF END OF ACTIVE SL.
;CHANGES P2
SLGTX: PUSHJ P,SLGTA
PUSHJ P,SLXAES
POPJ P,
;SUBROUTINE TO GET NEXT FSN. IN ACTIVE LIST ONLY
; SIMILAR TO SLIGT EXCEPT NOSKIP IF FENCE ENCOUNTERED
;
;CALL P2 SL.PTR.
;NOSKIP END OF ACTIVE LIST (EITHER BEFORE OR AFTER INCREMENTATION)
;SKIP T1 FSN.
; P2 INCREMENTED
;CHANGES P2, PRESERVES T2
NXSTR: PUSH P,U ;PRESERVE U
NXSTR0:
PUSHJ P,SLITA ;GET NEXT STR
JRST UPOPJ##
SKIPN T3,TABSTR##(T1)
JRST NXSTR0 ;NOT THERE, TRY NEXT
IFN FTPSTR,<
PUSHJ P,PVSTR ;IS THE CURRENT STR PRIVATE? (ALL S.L.)
JRST NXSTR0 ;YES, TRY NEXT STR
>
SKIPLE T4,STRJOB##(T3) ;SINGLE ACCESS?
CAMN T4,.CPJOB## ;YES, BY THIS JOB
JRST NXSTR1 ;OK
MOVE T4,.CPJOB## ;SINGLE ACCESS
MOVE T4,JBTPPN##(T4) ;IS HE [1,2]?
CAME T4,FFAPPN##
JRST NXSTR0 ;NO, CAN'T USE STR
NXSTR1:
IFE FTMDA,<
HLRZ T3,STRUNI##(T3)
MOVE T3,UNIUST##(T3)
TLNE T3,UNPNNA## ;IF NO NEW ACCESS...
> ;END IFE FTMDA
IFN FTMDA,<
HLRZ U,STRUNI##(T3) ;GET FIRST DDB IN STR
PUSHJ P,CHKLOK ;NO NEW ACCESS?
> ;END IFN FTMDA
JRST NXSTR0 ;... NO, TRY NEXT
JRST UPOPJ1## ;OK, TRY THIS STR
SLITA:: PJUMPL P2,SLGTA ;IF PREDECREMENTED, GET 1ST FSN.
PUSHJ P,SLGTA ;END OF SL.?
POPJ P, ;YES
IBP P2 ;NO-INCREMENT
PJRST SLGTA
;SUBROUTINE TO CHECK IF THE CURRENT STR IS PRIVATE AND IF SO,
; CHECK IF THE CURRENT USER HAS ACCESS TO IT
IFN FTPSTR,<
PVSTR: PUSHJ P,SAVE2## ;SAVE P1-P2
MOVE P1,STRPVS##(T3) ;WORD CONTAINING PRIVATE STR BIT
TRNN P1,STPPVS## ;IS IT A PRIVATE STR?
JRST CPOPJ1## ;NO
MOVE J,.CPJOB## ;JOB #
PUSHJ P,SLPTR ;YES, GET THE USERS S.L.
PJRST PRVJO ;NO S.L., ONLY IF PRIVILEGED
PUSHJ P,SLFND ;IS THIS STR IN THE USERS S.L.
PJRST PRVJO ;NO, SKIP IT UNLESS THE USER HAS PRIV'S
JRST CPOPJ1## ;YES, USER CAN ACCESS IT
>
;SUBROUTINE TO PUT FSN.& BITS INTO CURRENT SL. POSITION
;
;CALL P2 SL.PTR.
; T1 FSN.
; T2 BITS (FS.WLK, FS.NCR)
;NOSKIP PHYSICAL END OF LIST (FSN.& BITS NOT STORED)
;SKIP P2 MAY BE MODIFIED BUT 'POINTS' TO SAME (STORED) FSN.
;CHANGES P2, RESPECTS T4
SLPUT: PUSH P,T1
PUSHJ P,SLGET ;FIX UP PTR AND CK. FOR END
JRST [
CAIN T1,.FSSTP ;PHYSICAL END?
JRST TPOPJ## ;YES--NOSKIP
JRST .+1 ;NO--CONTINUE
]
MOVE T1,T2 ;COMBINE FSN.& BITS
ANDI T1,FS.BMK
IOR T1,(P)
DPB T1,P2
JRST TPOPJ1## ;SKIP
;SUBROUTINE TO PUT FSN. AND BITS AT NEXT POSITION IN SL.
; SIMILAR TO SLPUT EXCEPT INCREMENTS POINTER FIRST
;
;CALL P2 SL.PTR.
; T1 FSN.
; T2 FS. BITS
;NOSKIP END OF LIST (EITHER BEFORE OR AFTER INCREMENTATION)
;SKIP P2 POINTS TO NEXT (STORED) FSN.
;CHANGES P2, RESPECTS T4
SLIPT: PUSH P,T1
PUSHJ P,SLINC
JRST [
CAIN T1,.FSSTP ;PHYSICAL END?
JRST TPOPJ## ;YES--NOSKIP
JRST .+1 ;NO--OK TO STORE
]
POP P,T1
PJRST SLPUT
;SUBROUTINE TO COPY ONE SL. TO ANOTHER.
; MAY BE USED TO COPY PART OF SL. ONTO ITSELF AS IN REMOVING
; A FSN. FROM A SL.
;
;CALL P2 'FROM' SL.PTR.-- POINTING TO 1ST FSN. TO MOVE
; P3 'TO' SL.PTR.--POINTING TO 1ST PLACE TO STORE
;NOSKIP 'TO' SL. TOO SMALL TO ACCOMODATE 'FROM' LIST
;SKIP SUCCESSFUL
SLBLT: PUSHJ P,SAVE3##
PUSH P,T1
PUSH P,T2
PUSHJ P,SLGET
JRST [ADD P3,[110000,,0]
JRST SLFIN]
PUSHJ P,SLGTB
EXCH P3,P2
PUSHJ P,SLPUT
PJRST TTPOPJ##
SLBLT2: EXCH P3,P2
PUSHJ P,SLIGT
PJRST SLFIN
PUSHJ P,SLGTB
EXCH P2,P3
PUSHJ P,SLIPT
JRST TTPOPJ##
JRST SLBLT2
;SUBROUTINE TO APPEND FSN.& BITS TO SL.
; SIMILAR TO SLPUT EXCEPT FOLLOWS PUT WITH INCREMENT & PUT 'END(
;
;CALL P2 SL.PTR.
; T1 FSN.
; T2 FS. BITS
;NOSKIP END OF LIST (FSN. NOT STORED)
;SKIP P2 POINTS TO END (PHYSICAL OR LOGICAL) FOLLOWING STORED FSN.
;RETURNS T1,T2 UNCHANGED, CHANGES P2
SLAPD:: PUSH P,T1
PUSH P,T2
PUSHJ P,SLPUT
PJRST TTPOPJ## ;NO ROOM--NO SKIP
EXCH P2,P3 ;CAUSE SLFIN WILL EXCH THEM BACK
PUSHJ P,SLFIN1 ;ADD THE TERMINATOR
JRST TTPOPJ## ;NO ROOM--NO SKIP
JRST TTPPJ1 ;RESTORE ACS AND SKIP
SLFIN: PUSHJ P,SLFIN1 ;ADD THE TERMINATOR
PUSHJ P,SLXSLO ;STOPCODE SLO
TTPPJ1: AOS -2(P) ;SKIP RETURN
JRST TTPOPJ##
SLFIN1: MOVEI T1,.FSEND ;MARK END OF LIST
SETZ T2,
EXCH P2,P3
PJRST SLIPT
;SUBROUTINE TO INIT A SL. AS EMPTY
;
;CALL P2 SL.PTR.
;NOSKIP ALWAYS P2 UNMODIFIED
;
;STOPCD AES SL.NOT LONG ENOUGH FOR FENCE MARKERS
;RESPECTS T1
SLINI:: PUSH P,T1
PUSH P,P2
MOVEI T1,.FSFNC ;PUT FENCE
SETZ T2,
PUSHJ P,SLAPD
PUSHJ P,SLXAES ;STOPCD AES
POP P,P2
PJRST TPOPJ##
;SUBROUTINES TO SEARCH FOR AN FSN. IN A SL.
;
;CALL SLFND SEARCH BOTH ACTIVE AND PASIVE LISTS
; SLFNA SEARCH ONLY ACTIVE LIST (I.E. STOP ON FENCE)
;
; P2 SL.PTR. FOR WHERE TO START LOOKING
; RH(T1) FSN.: FIND THIS FSN.
; .FSFNC: FIND THE FENCE (FOR SLFNDA, USE .FSEND BELOW)
; .FSEND: IF SLFND, FIND END (LOGICAL OR PHYSICAL) OF WHOLE LIST
; IF SLFNDA, FIND FENCE (END OF ACTIVE LIST)
;NOSKIP NEVER IF RH(T1)=.FSEND
; ELSE FAIL TO FIND FSN. (OR FENCE)
; P2 POINTS TO END OF LIST
;SKIP P2 POINTS TO FSN. (OR FENCE) SOUGHT
; POINTS TO END (LOGICAL OR PHYSICAL) IF CALLED WITH .FSEND
;CHANGES P2
SLFND:: PUSHJ P,SAVE1##
MOVEI P1,SLGET ;SEARCH WHOLE LIST
JRST SLFND0
SLFNA:: PUSHJ P,SAVE1##
MOVEI P1,SLGTA ;ONLY ACTIVE SL.
SLFND0: PUSH P,T1
PUSHJ P,(P1) ;SLGET OR SLGETA
JRST SLFND2
SLFND1: TDC T1,(P) ;IS THIS THE ONE?
TRNN T1,-1
PJRST TPOPJ1## ;YES-SKIP RETURN
PUSHJ P,SLINC ;NO-GET NEXT ONE
JRST SLFND2
PUSHJ P,(P1)
JRST SLFND2
JRST SLFND1
SLFND2: HRRZ T1,(P) ;HERE ON END OF LIST--LOOKING FOR END?
CAIN T1,.FSEND
AOS -1(P) ;YES-FOUND IT SO SKIP RETURN
PJRST TPOPJ## ;NO--NOSKIP RETURN
;SUBROUTINE TO CHECK THE NUMBER OF F.S. IN A SL.
;IF NUMBER EXCEEDS THE MAXIMUM ALLOWED (.SLMXJ) TAKE ERROR
;RETURN.
;CALL P1 POINTING TO BEGINING OF SL.
;NOSKIP SL CONTAINS TOO MANY F.S. (EXCEEDS .SLMXJ)
;SKIP SUCCESSFUL
SLCHK: PUSHJ P,SAVT## ;SAVE T1-T4
MOVE T1,[POINT 9,(P1)] ;SET UP COUNTER TO SL.
SETZ T2, ;COUNTER
SLCHK0: ILDB T3,T1 ;GET NEXT
CAIN T3,.FSTMP ;IGNORE TMP MARKERS
JRST SLCHK0
CAIN T3,.FSSTP ;STOP MASK BEFORE END ?
POPJ P, ;YES -- ERROR
CAIE T3,.FSEND ;END MASK ?
AOJA T2,SLCHK0 ;NO -- INCREMENT COUNT AND CONTINUE
CAILE T2,.SLMXJ+1 ;YES -- HAVE WE EXCEEDED MAX ?
POPJ P, ;YES -- ERROR
PJRST CPOPJ1## ;NO -- SKIP RETURN
;MULTIPURPOSE STOPCDS FOR SEARCH LIST CODE
; PUSHJ'D TO SO CAN FIND EXACT TROUBLE SPOT
SLXESS: STOPCD .+1,JOB,ESS, ;++EMPTY SYSTEM SEARCH LIST
POPJ P,
SLXAES::STOPCD .+1,JOB,AES, ;++ABNORMAL END OF SEARCH LIST
POPJ P,
SLXBPT::STOPCD .+1,JOB,BPT, ;++BAD SEARCHLIST POINTER
POPJ P,
SLXSLO: STOPCD .+1,JOB,SLO ;++SEARCH LIST OVERFLOW
POPJ P,
SUBTTL FNDFIL - MANIPULATE DIRECTORIES, ACCESS TABLES
;IN THIS MODULE P3=LOC OF PPB, P4=LOC OF NMB, P2=BYTE POINTER TO P1 (SEARCH LIST)
;SUBROUTINE TO FIND A FILE NAME IN CORE OR ON DISK
;ENTER WITH DEVPPN=PPN T2=SEARCH LIST
;M HAS UUOREN,UUOLUK, OR UUOENT ON IN LH
;RETURNS CPOPJ IF ERROR
;RETURNS CPOPJ1 IF OK
;IF FNDFIL READ THE RIB IT WILL RETURN WITH THE MONITOR BUFFER, AND THE RIB IN IT
;IN THAT CASE, IOSRIB IS ON IN S, AND L(MON BUF) IS IN T1
;IN THIS MODULE P3=LOC OF PPB, P4=LOC OF NMB,
;P1=PTR.TO BEGINNING OF SL., P2=WORKING PTR. TO SL. (INCREMENTED ETC.)
;SUBROUTINE TO FIND A FILE NAME IN CORE OR ON DISK
;ENTER WITH DEVPPN=PPN T2=PREDECREMENTED SEARCH LIST POINTER
; (MUST PNT.TO BEG.OF SL.FOR CALL TO SLGVT (SEE BELOW))
;M HAS UUOREN,UUOLUK, OR UUOENT ON IN LH
;RETURNS CPOPJ IF ERROR
;RETURNS CPOPJ1 IF OK
;IF FNDFIL READ THE RIB IT WILL RETURN WITH THE MONITOR BUFFER, AND THE RIB IN IT
;IN THAT CASE, IOSRIB IS ON IN S, AND L(MON BUF) IS IN T1
;BEFORE RETURN TO CALLER, FNDFIL CALLS SLGVT TO GIVE UP POSSIBLE
; TEMP.SL. CALL FNDFLA TO AVOID CALL TO SLGVT.
FNDFIL::HRRZM P,.USLBF ;INDICATE WE CAN USE LARGE BUFFERS
PUSH P,T2 ;SAVE SL.PTR.FOR CALL TO SLGVT LATER
PUSHJ P,FNDFLA
SOS -1(P) ;PROPAGATE NOSKIP
EXCH P2,(P)
PUSHJ P,SLGVT
POP P,P2
RMVLBF::SETZ T2,
EXCH T2,.USLBF ;INDICATE DON'T USE EXTRA PAGE FOR DIRECT SEARCH
JUMPGE T2,CPOPJ1## ;RETURN IF WE DIDNT GET ONE
MOVEI T2,1(T2) ;HAD ONE - GET ITS ADDRESS
PUSH P,T1 ;SAVE POSSIBLE ERROR CODE
MOVEI T1,4*BLKSIZ##
PUSHJ P,GVFWDS## ;GIVE IT UP
PJRST TPOPJ1## ;AND RETURN
FNDFLA:: ;CALL HERE TO AVOID SLGVT CALL
HLRZ T3,DEVEXT(F) ;GET EXTENSION
CAIN T3,(SIXBIT /UFD/) ;UFD?
TLNE M,UUODIR## ;YES. PRIVILEGED JOB AND RIPDIR SET?
SKIPA ;OK
JUMPGE M,FNER2W ;NO - ENTER OR RENAME IS ILLEGAL
;("UFD" IS A RESERVED EXTENSION)
PUSHJ P,SAVE4## ;SAVE P1-P4
FNDFLZ: TLZ M,UUOSF2## ;MAKE SURE THESE BITS ARE 0
TLZ S,IOSUPR ;MAKE SURE SUPER USETI BIT IS OFF
MOVE P1,T2 ;SEARCH LIST INTO P1
LDB P4,PJOBN## ;JOB NUMBER
HRRZ T1,DEVACC##(F)
JUMPE T1,FNDFL1
MOVE T2,ACCSTS##(T1)
TRNE T2,ACPSUP+ACPCRE
PUSHJ P,ATRMOV ;IF STR FILLED ON ENTER AFTER UFBSZ
FNDFL1: MOVE J,.CPJOB## ;WE OWN THE CB ALREADY
CAME J,CBUSER## ; IF COMING FROM ADJPT
PUSHJ P,GETCB
HLRZ T2,SYSPPB## ;START OF PPB LIST
MOVEI T3,DIFPPL## ;SYSPPB-CORLNK (IN CASE THIS 1ST. PPB)
MOVE T1,DEVPPN(F) ;PPN
PUSHJ P,LSTSRC ;SEARCH FOR RIGHT PP BLOCK
JUMPLE T2,FNER1A ;%NO FREE CORE IF 0
CBDBUG (Y,Y);
MOVE T4,PPBNLG##(T2) ;%LOGGED-IN WORD
CAME T1,JBTPPN##(P4) ;%PPN OF FILE=PPN OF JOB?
CAMN T1,SPLPPN## ;% NO, IS IT PRINT (MPB) PPN?
TRO T4,PPPNLG## ;%YES - PPN IS LOGGED IN
CAME T1,MFDPPN## ;%IS IT MFD PPN
CAMN T1,SYSPPN## ;%OR CUSP PPN?
TRO T4,PPPNLG## ;%YES, SET LOGGED-IN BIT
CAMN T1,XSYPPN## ;%KEEP CORE BLOCKS
TRO T4,PPPNLG## ;% FOR NEW
MOVEM T4,PPBNLG##(T2) ;%
SKIPE DEVFIL(F) ;%NAME=0?
JRST NMBLUP ;%NO, CONTINUE
HRRM T2,DEVACC##(F) ;%YES, SETPTH WANTS TO KNOW LOC
PJRST GVCBJ1 ;% OF PPB, SO TELL IT IN DEVACC AND RETURN
;HERE WITH T2 = LOC OF PPB BLOCK
NMBLUP: MOVE P3,T2 ;%P3=LOC OF PP BLOCK
AOS PPBCNT##(P3) ;%1 MORE USER OF PPB
PUSHJ P,SET1NM## ;%SET T2=LOC OF 1ST NMB IN LIST
MOVE T1,DEVFIL(F) ;%NAME OF FILE
PUSHJ P,LSTSRA ;%SCAN FOR MATCHING NAME BLOCK
JRST SETNMB ;%JUST CREATED A NAME BLOCK FOR FILE
FNDNM2: HLRZ T4,DEVEXT(F) ;%NAMES MATCH- CHECK EXTENSIONS
HRRZ T3,NMBEXT##(T2) ;%CHECK EXTENSIONS
CAIN T3,(T4) ;%MATCH?
JRST STRLUK ;%YES, FOUND THE NAME BLOCK
PUSHJ P,LSTSR1 ;%WRONG - SEARCH FOR ANOTHER
JRST SETNMB ;%JUST CREATED ONE
JRST FNDNM2 ;%CHECK EXTENSIONS
;HERE WHEN A NEW NAME BLOCK HAS JUST BEEN CREATED
SETNMB: JUMPE T2,FNER1B ;%ERROR IF NO FREE CORE
HLRZ T1,DEVEXT(F) ;%GET EXTENSION (NAME ALREADY SET UP)
HRRZM T1,NMBEXT##(T2) ;%SAVE IN NAME BLOCK
MOVEI T3,NMPUPT##(T2) ;%IS THIS AN SFD?
CAIN T1,'SFD'
HRLM T3,NMBRNG##(T2) ;%YES, STORE UPWARD-POINTER TO ITSELF
MOVEI T1,DIFNAL##(T2) ;%SET NMBACC TO POINT TO ITSELF (+DIFNAL)
HRLM T1,NMBACC##(T2) ; SO THAT IT IS IN A 1-ITEM RING
MOVE T1,PPBYES##(P3) ;%MARK THAT THE FILE DOESN'T EXIST IN
ANDCA T1,PPBKNO##(P3) ;% ANY STRS WHERE THE UFD DOESN'T EXIST
LSH T1,COJKNO## ;%
DPB T1,NMYKNO## ;%
;HERE WITH T2= LOC OF NAME BLOCK
STRLUK: HRR P4,T2 ;%P4= LOC OF NAME BLOCK
AOS NMBCNT##(P4) ;%1 MORE USER OF NMB
PUSHJ P,GVCBJ ;%GIVE UP CB RESOURCE
STRLK1: MOVE P2,P1 ;P2 = SL. PTR
STRLUP: PUSHJ P,NXSTR ;GET NEXT STR IN LIST
JRST STRDON ;YES, LOOKED AT ALL STR'S
PUSHJ P,SETUFB ;STORE UFB LOC (IF THERE IS ONE) IN DDB
JFCL ;NO UFB YET
HRL P3,T2 ;SAVE LOC OF UFB (OR 0) IN LH(P3)
MOVE U,TABSTR##(T1) ;NO. LOC OF STR DATA BLOCK
HLRZ U,STRUNI##(U) ;LOC OF 1ST UNIT DB IN STR
IFE FTMDA,<
MOVE T1,UNIUST##(U) ;HAS F/S BEEN LOCKED?
TLNE T1,UNPNNA##
> ;END IFE FTMDA
IFN FTMDA,<
PUSHJ P,CHKLOK ;IS IT LOCKED
> ;END IFN FTMDA
JRST SCNSTR ;YES-SKIP THIS ONE
PUSHJ P,STORU## ;NO--SAVE LOC OF UNIT IN DDB
PUSHJ P,FSNPOS ;POSITION A BIT FOR TESTING NMBKNO,NMBYES
TDNE T2,PPBYES##(P3) ;DOES A UFD EXIST IN THIS STR?
TLO M,UUOUFD## ;YES. LIGHT A BIT IN UUO
TLZE P3,-1 ;IF THERE IS NO UFB, OR
TDNN T2,NMBKNO##(P4) ;DO WE KNOW IF FILE EXISTS IN STR?
JRST STRLP2 ;DONT KNOW - READ UFD
TDNN T2,NMBYES##(P4) ;YES. IS IT THERE?
JUMPL M,SCNSTR ;NOT THERE - TRY NEXT STR IF LOOKUP
;HAVE TO SCAN AT'S ANYWAY IF ENTER/RENAME
;SINCE ANOTHER JOB MIGHT HAVE DELETED THE FILE,
;THEN DONE A NEW ENTER
PUSHJ P,GETCB ;GET CB RESOURCE
STRLP9: HLRZ T2,NMBACC##(P4) ;%YES. SCAN ACCESS TABLES FOR A MATCH
PUSHJ P,BYTSCA ;%
JRST ACCLP1 ;%FOUND AN A.T. ENTRY
JRST CFPCHK ;%NO ACCESS TABLES AT ALL
;HERE WHEN WE DONT KNOW IF FILE EXISTS IN STR
STRLP2: TDNE T2,PPBKNO##(P3) ;DOES UFD EXIST IN STR?
TDNE T2,PPBYES##(P3)
JRST UFBLUP ;YES OR MAYBE - READ AND CHECK
JRST NOFIL2 ;NO. MARK NMB
;LOOP TO CHECK ACCESS TABLES FOR THE RIGHT ONE
ACCLUP: PUSHJ P,BYTSC1 ;%ANOTHER A.T. FOR THIS STR?
ACCLP1: SKIPA T4,ACCSTS##(T2) ;%FOUND. GET STATUS
JRST CFPCHK ;%NONE THERE
TRNE T4,ACPDEL## ;%FILE MARKED FOR DELETION?
JRST ACCLUP ;%YES. IGNORE THIS A.T.
;HERE WHEN RIGHT ACCESS TABLE ENTRY FOUND
HRRZ T3,DEVUFB##(F) ;%LOC OF UFB BLOCK
JUMPE T3,UFBLP1 ;%MUST HAVE THE UFB BLOCK IN CORE IF WE FIND THE A.T.
; SINCE DEVUFB IS USED AS A FLAG TO SEE IF A NOT
; LOGGED-IN PPB AND ITS NMB'S CAN BE DELETED
JUMPG M,ACCLP2 ;%M NEGATIVE IF LOOKUP
TRNE T4,ACPCRE+ACPSUP;%IS FILE READABLE?
JRST ACCLUP ;%NO, LOOK FOR ANOTHER A.T. FOR FILE
HRRM T2,DEVACC##(F) ;%YES. SAVE LOC OF A.T.
MOVSI T1,DEPPRV##
TDNE T1,DEVPRV##(F) ;IF JUST SETTING UP A PATH
JRST ACLP1C ; DON'T CHECK INTERMEDIATE SFD'S
MOVEI T1,FNCRED## ;%SEE IF WE CAN READ THE FILE
PUSHJ P,CHKPRV ;%CHECK ACCESS PRIVILEGES
JRST FNER2X ;%WRONG PRIVILEGES - ERROR
HRRZ T2,DEVACC##(F) ;%LOC OF A.T.
MOVE T1,ACCSTS##(T2) ;%A.T. STATUS
TRNN T1,ACPDEL##+ACPCRE+ACPSUP ;%FILE STILL READABLE?
JRST ACLP1C ;%YES
HLLZS DEVACC##(F) ;%NO, CLEAR POINTER TO A.T.
LDB T1,ACYFSN## ;%GET BACK FSN
JRST ACCLUP ;%LOOK FOR ANOTHER A.T.
ACLP1C: HRRZ T2,DEVACC##(F) ;%FILE CAN BE READ
SKIPE T1,ACCDOR##(T2) ;%DORMANT?
PUSHJ P,UNLINK ;%YES. MAKE ACTIVE
CBDBUG (Y,Y);
HLRZ T1,NMBRNG##(P4)
TLZN M,UUO2SF## ;%SECOND TIME WE'VE LOOKED?
SKIPN T1 ;%NO, IS THIS AN SFD?
JRST ACLP1B ;%NO, CONTINUE
TLO M,UUOSFD## ;%YES, INDICATE FOUND AN SFD
ACLP1A: PUSHJ P,GVCBJ ;%GIVE UP CB
JRST SCNSTR ;AND GO LOOK FOR ONE ON ANOTHER STR
ACLP1B:
MOVEI T3,ACPCNT## ;%UPDATE COUNT OF READERS
ADDM T3,ACCCNT##(T2) ;%
MOVE T1,ACC1PT##(T2) ;%1ST UNIT WORD
LDB T2,UN1PTR## ;%1ST UNIT
PUSHJ P,NEWUNI## ;%SET U TO RIGHT UNIT
SKIPA ;%INVALID UNIT
HRLM U,DEVUNI##(F) ;%SAVE 1ST UNIT IN DDB
SETZM DEVRIB##(F) ;%CLEAR DEVRIB FOR DPB'S
LDB T2,UNYLUN## ;%GET LOGICAL UNIT NUMBER
DPB T2,DEYRBU## ;%TO CURRENT RIB WORD
MOVE T4,UNISTR##(U) ;%GET POINTER TO STRUCTURE DATA BLOCK
MOVE T2,T1 ;%GET FIRST POINTER INTO T1
LDB T2,STYCLP##(T4) ;%EXTRACT CLUSTER ADDRESS
DPB T2,DEYRBA## ;%AND SET TO CURRENT RIB POINTER
TLO S,IOSRDC ;%THIS FILE HAS READ COUNT UP
PUSHJ P,STWLK ;%SET BIT IN S IF STR IS WRITE LOCKED
PJRST FNDXIT ;%GIVE UP CB AND SKIP-RETURN
;HERE WHEN A.T. FOUND FOR ENTER OR RENAME
ACCLP2: TLNE M,UUOREN## ;%RENAME?
JRST FNDER5 ;%YES. ERROR
HLRZ T3,NMBRNG##(P4) ;%NO, ENTER
SKIPN T3 ;%TRYING TO SUPERSEDE AN SFD?
TLNE M,UUODIR## ;OR A UFD?
JRST FNDR10 ;%YES, ILLEGAL
SKIPL T3,DEVSPL(F) ;%NO, SPOOL-MODE
TRNE T3,DEPECS ;%OR NON-SUPERSEDING ENTER
JRST NOSUPR ;%YES, CANT SUPERSEDE
TRNE T4,ACPCRE+ACPREN+ACPSUP+ACPUPD;%NO. CREATE, SUPERSEDE OR UPDATE?
JRST FNDER7 ;%YES. ERROR
HRRM T2,DEVACC##(F) ;%NO. SAVE LOC OF A.T.
ACCLP3: PUSHJ P,BYTSC1 ;%SEARCH FOR MORE A.T.'S (MAY BE A SUPERSEDER)
SKIPA T4,ACCSTS##(T2) ;%FOUND AN A.T.
JRST ACCLP4 ;%NO MORE. OK
TRNE T4,ACPCRE+ACPSUP+ACPUPD+ACPREN ;%THIS A.T. WRITING?
JRST FNDER7 ;%YES. ERROR
JRST ACCLP3 ;%NO. TEST NEXT
;HERE IF TRYING TO SUPERSEDE ON A SPOOL-MODE OR NON-SUPERSEDING ENTER.
NOSUPR: MOVEI T1,AEFERR
PJRST FNDLC ;%REMOVE DUMMY A.T. AND RETURN
;HERE WHEN THE FILE MAY BE WRITTEN (NO WRITER YET)
ACCLP4: PUSHJ P,NXSTR ;%GET NEXT STR
JRST ACCLP5 ;%AT END
JRST ACCLP3 ;%TEST THIS STR
IFN FTFDAE,<
;ROUTINE TO TEST IF SOME OTHER JOB IS SUPERSEDING THE FILE
;P1 PASSES SL PTR
;P4 PASSES NMB ADDR
;RETURNS CPOPJ IF SOMEBODY SUPERSEDING
;RETURNS CPOPJ1 IF ALL CLEAR
TSTRIT: PUSHJ P,SAVE2 ;%SAVE P1-P2
MOVE P2,P1 ;%START AT BEGINING OF SL
TSTRT1: PUSHJ P,NXSTR ;%GET NEXT FSN IN SL
JRST CPOPJ1 ;%NONE LEFT, IT'S OK
MOVEI T2,DIFNAL##(P4) ;%START AT 1ST ACC
TSTRT2: PUSHJ P,BYTSC1 ;%GET NEXT ACC ON THIS STR
SKIPA T4,ACCSTS##(T2) ;%GET STATUS
JRST TSTRT1 ;%NONE LEFT, TRY NEXT STR
TRNN T4,ACPDEL## ;%IGNORE IF MARKED FOR DELETION
TRNN T4,ACPCRE+ACPREN+ACPSUP+ACPUPD;%IF NOBODY IS WRITTING
JRST TSTRT2 ;%CHECK FOR ANOTHER ACC
POPJ P, ;%SOMEBODY IS WRITTING, FAIL
>
;ROUTINE TO TEST IF THE A.T. GOT MARKED FOR DELETION
;THIS CAN HAPPEN IF FILDAE WAS CALLED
;ENTER WITH DEVACC, DEVUFB, AND U SET UP
;ENTER WITH CB
;EXIT CPOPJ1 IF THE A.T. WAS OK
;CPOPJ1 STILL HAVING CB
;EXIT CPOPJ IF THE A.T. WAS MARKED FOR DELETION.
;IF THE A.T. IS MARKED FOR DELETION, AND WE ARE THE LAST USER
;THEN DELETE THE A.T. AND RETURN THE DISK BLOCKS.
;CPOPJ WITHOUT CB
;DETROYS ALL TEMPORARIES
TSTAMD::HRRZ T3,DEVACC##(F) ;%GET ADDR OF A.T.
JUMPE T3,CPOPJ1## ;%ALL IS OK IF NO A.T.
MOVE T2,ACCSTS##(T3) ;%GET STATUS WORD
TRNN T2,ACPDEL## ;%MARKED FOR DELETION?
JRST CPOPJ1## ;%NO, A.T. IS OK
TRNE T2,ACMCNT ;%YES, ANY MORE USERS?
PJRST GVCBJ ;%MORE USERS, LEAVE IT ALONE
PUSHJ P,GVCBJ ;%GIVE UP CB. NOBODY WILL GRAB THE
;% A.T. SINCE IT HAS ACPDEL ON
PUSHJ P,SAVE1## ;SAVE P1
PUSHJ P,AT2DDB ;SET UP DDB POINTERS FROM A.T.
JRST TSTAM1 ;BAD POINTER
PUSHJ P,REDRIB## ;READ THE PRIME RIB
JRST TSTAM1 ;RIB ERROR
PUSHJ P,SPTRW## ;GET AOBJN POINTER TO RTP'S
MOVE P1,T1
PUSHJ P,DELRIB## ;RETURN ALL THE DISK BLOCKS
JFCL
TSTAM1: HRRZ T2,DEVACC##(F) ;GET A.T. BACK
PUSHJ P,GETCB ;GET INTERLOCK
PJRST ATRMVX ;%DELETE THE A.T. AND GIVE UP CB
;HERE IF THERE ARE NO WRITERS IN ANY STR IN SEARCH LIST
ACCLP5: MOVEI T1,FNCSUP## ;%SEE IF SUPERSEDE IS LEGAL
PUSHJ P,CHKPRV ;%CHECK PRIVILEGES
JRST FNER2X ;%PRIVILEGES WRONG
IFN FTFDAE,<
PUSHJ P,TSTAMD ;%A.T. MARKED FOR DELETION?
JRST STRLK1 ;YES, THROW IT AWAY AND START OVER
PUSHJ P,TSTRIT ;%ANOTHER SUPERSEDER SNEAK IN?
JRST FNDER7 ;%YES
>
HRRZ T2,DEVACC##(F) ;%
MOVE T1,ACCNDL##(T2) ;%DONT-DELETE WORD
TRNE T1,ACPNDL## ;%IS THIS A MAGIC FILE?
JRST FNER2X ;%YES, EVEN [1,2] CANT SUPERSEDE IT
LDB T3,ACZCNT## ;%NO, GET USER COUNT
SKIPE ACCDOR##(T2) ;%IS THE A.T. DORMANT?
JUMPE T3,FILRR5 ;%MAYBE, DON'T TRUST ACCDOR IF FILDAE LIT ACCCNT
;HERE IF THE A.T. WE FOUND IS NOT DORMANT (MUST BE READING)
ACCLP6: LDB T1,ACYFSN## ;%FSN OF FILE TO BE SUPERSEDED
DPB T1,DEYFSN## ;%SAVE FSN OF SUPERSEDED FILE
HLLZ P2,ACCPRV##(T2) ;%PROTECTION OF OLD FILE
TLZ P2,777 ;%PROTECTION ALONE
PUSHJ P,CREAC ;%SET UP ACCESS TABLE
JRST FNDER1 ;%NO TABLE ROOM
MOVEM P2,ACCPRV##(T3) ;%SET OLD FILE'S PROT INTO NEW A.T.
HRRM T2,DEVACC##(F) ;%SAVE LOC OF A.T.
DPB T1,ACYFSN## ;%INDICATE FSN OF FILE
PUSHJ P,STWLK ;%LIGHT IOSWLK IF STR IS READ-ONLY
JRST STRD3A ;%GO STORE VALUES INTO NEW A.T.
;HERE WHEN A.T. NOT FOUND FOR THIS FILE FOR THIS STR. HAVE TO READ RIB
CFPCHK: PUSHJ P,FSNPS2 ;%DOES FILE EXIST ON THIS STR?
TDNN T2,NMBYES##(P4)
JRST ACLP1A ;%NO, DON'T BOTHER TO READ THE DIR
HRRZ T2,NMBCFP##(P4) ;%POINTER TO FILE RIB BLOCK
LDB T3,NMXFSN## ;T3=FSN OF CFP
CAIN T1,(T3) ;%CFP FOR THIS STR?
JUMPN T2,FILRIB ;%YES. READ IT IF IT EXISTS
CAIA
;HERE WHEN CFP IS NOT FOR THIS STR. READ UFD (OR SFD)
UFBLUP: PUSHJ P,GETCB ;GET CB RESOURCE IF COMING FROM STRLUP
HRRZ T3,DEVCFS##(F) ;%CFP SUPPLIED?
JUMPE T3,UFBLP1 ;%NO. PROCESS NORMALLY
HRRM T3,NMBCFP##(P4) ;%YES, SAVE CFP IN NMB
JRST FILRIB ;%DO LOOKUP USING SUPPLIED CFP
UFBLP1: HLRZ T2,PPBUFB##(P3) ;%LOC OF UFB BLOCK
PUSHJ P,BYTSCA ;%FIND RIGHT UFB FOR THIS STR
SKIPN UFBPT1##(T2) ;%FOUND RIGHT UFB IF POINTER NON-0
PUSHJ P,GVCBJ1 ;%NOT THERE, GIVE UP CB RESOURCE AND SKIP
JRST SCNUFD ;%FOUND UFB - READ IT
;HERE WHEN NO POINTERS TO UFD EXIST - READ MFD
UFBLP2: SKIPG T3,TABSTR##(T1) ;STR DATA BLOCK LOC
JRST NOUFD1 ;NO STR OF THIS NUMBER EXISTS
PUSH P,DEVACC##(F) ;SAVE CURRENT DEVACC
HRRM T1,DEVACC##(F) ;STORE FSN IN DEVACC (FOR FNDUF1)
MOVE T2,STRPT1##(T3) ;1ST MFD POINTER FOR STR
MOVE T1,STRUN1##(T3) ;UNIT WHICH PT1 REFERS TO
PUSHJ P,SETFST ;SET UP FOR READING MFD
JRST NOUFD0 ;A.T. DATA FOULED UP BADLY - NO UFD EXISTS
PUSHJ P,GTMNBF## ;GET MONITOR BUFFER
MOVE T1,MFDPPN## ;PPN FOR UFD'S
PUSHJ P,FNDUF1## ;GET L(UFB) FOR MFD IN THIS STR
JRST UFBLP3 ;NOT THERE - NOTHING WE CAN DO ABOUT IT
HRRM T2,DEVUFB##(F) ;%FOUND - SAVE LOC OF UFB SO DIRRED
PUSHJ P,GVCBJ ;% WILL READ ALL OF THE MFD
UFBLP3: POP P,T1 ;RESTORE DEVACC
HRRM T1,DEVACC##(F)
MOVE T3,DEVUFB##(F)
LDB T3,UFYWRT## ;GET CURRENT SIZE
PUSH P,T3 ;SAVE FOR POSSIBLE LATER USE
;HERE TO READ AN MFD BLOCK
MFDLUP: PUSH P,DEVPPN(F) ;SAVE CURRENT PRJ,PRG
MOVE T1,MFDPPN## ;STORE MFD PRJ,PRG IN DDB
MOVEM T1,DEVPPN(F) ;IN CASE DIRRED READS THE RIB
PUSHJ P,DIRRED ;READ NEXT MFD BLOCK(S)
JRST NOUF0 ;UFD NOT FOUND
POP P,DEVPPN(F) ;RESTORE REAL PRJ,PRG
MOVE T1,PPBNAM##(P3) ;PRJ-PRG NUMBER
MOVEI T2,(SIXBIT .UFD.)
PUSHJ P,DIRSCN ;SEARCH MFD FOR UFD
JRST MFDLUP ;NOT THERE - TRY NEXT BLOCK
POP P,(P)
JRST UFDRIB ;FOUND UFD
;HERE WHEN NO UFD HAS BEEN FOUND IN THIS STR'S MFD
NOUFD0: POP P,DEVACC##(F) ;RESTORE DEVACC
JRST NOUFD1 ;AND CONTINUE
NOUF0: POP P,DEVPPN(F)
POP P,T1 ;GET ORIGINAL SIZE
MOVE T3,DEVUFB##(F)
LDB T3,UFYWRT## ;GET CURRENT SIZE
CAMG T1,T3 ;HAS SIZE GOTTEN SMALLER?
JRST NOUFD1 ;NO--PROCEED AS USUAL
MOVE T1,DEVUFB##(F) ;YES-SET UP TO RETRY
LDB T1,COZFSN##
JRST UFBLP2
NOUFD1: TRZE S,IODTER+IODERR ;ERROR READING RIB?
JRST SCNSTR ;YES, DONT MARK FILE NON-EXISTANT
PUSHJ P,FSNPOS ;NO, SET A BIT FOR THIS STR
ANDCAM T2,PPBYES##(P3) ;INDICATE UFD IS NOT IN THIS STR
ANDCAM T2,NMBYES##(P4) ;INDICATE FILE IS DEFINITELY NOT IN STR
SKIPN TABSTR##(T1) ;IF NOT A FILE STRUCTURE (DEVICE ALL:)
JRST SCNSTR ; DON'T KNOW ABOUT UFD
ORM T2,PPBKNO##(P3)
ORM T2,NMBKNO##(P4)
JRST SCNSTR ;GO LOOK AT NEXT STR
;HERE WHEN UFD HAS BEEN FOUND IN THIS STR. CFP IN T1
UFDRIB: PUSHJ P,CFP2BK ;CONVERT TO BLOCK NO. FOR RIB
JRST NOFILE ;BAD CFP - FILE NOT FOUND
PUSHJ P,UFDRED## ;READ THE UFD RIB
JRST SCNSTR ;BAD UFD - FILE NOT FOUND
MOVE T2,RIBSIZ##+1(T1) ;LENGTH (IN WORDS) OF UFD DATA
TRZN T2,BLKSIZ##-1 ;MULTIPLE OF 200 WORDS?
JRST UFDRB0 ;YES
ADDI T2,BLKSIZ## ;NO, MAKE IT SO (SO THAT RETURNING NO. OF WORDS IN
MOVEM T2,RIBSIZ##+1(T1) ; LAST BLOCK WILL ALWAYS WORK - RETURNING ACTUAL NO OR MORE)
MOVE T2,RIBSLF##+1(T1) ;BLOCK NUMBER OF UFD RIB AGAIN
PUSHJ P,MONWRT## ;REWRITE UFD RIB
UFDRB0: PUSHJ P,SLGTX ;T1=STR NUMBER
PUSHJ P,GETCB ;GET CB RESOURCE
HLRZ T2,PPBUFB##(P3) ;%SET UP TO SCAN UFB BLOCKS
MOVEI T3,DIFPBC##(P3) ;%SET T3 AS PREDECESSOR IN CASE NO UFB
PUSHJ P,BYTSRC ;%SEE IF THE RIGHT UFB SNUCK IN
JRST UFDRB1 ;%CREATED THE UFB
SKIPE UFBPT1##(T2) ;%FOUND A SNEAK-IN IF PNTR NON-0
JRST SCNUFD ;%SNEAK-IN. USE IT
UFDRB1: JUMPLE T2,FNDR1B ;%NO CORE BLOCKS AVAILABLE IF 0
DPB T1,UFYFSN## ;%STORE FSN IN UFB
SETZ T1, ;%
HRRM T2,DEVUFB##(F) ;%SAVE LOC OF UFB IN DDB
MOVE T3,.USMBF ;%LOC OF MON BUF
ADD T3,RIBFIR##+1(T3) ;%LOC OF 1ST RETRIEVAL POINTER
MOVE T4,1(T3) ;%NUMBER OF 1ST UNIT
DPB T4,UN1PTR## ;%STORE IN T1
MOVE T2,2(T3) ;%GET REAL 1ST POINTER
SKIPN 3(T3) ;%ONLY POINTER?
TRO T1,UFP1PT## ;%YES. LIGHT 1PT
MOVE T4,DEVUFB##(F) ;%LOC OF UFB BLOCK
HRRM T1,UFBUN1##(T4) ;%STORE UN1,1PT DATA
MOVEM T2,UFBPT1##(T4) ;%STORE FIRST POINTER IN UFB
HRRZ T3,.USMBF ;%LOC OF MONITOR BUFFER (-1) AGAIN
MOVE T1,RIBQTF##+1(T3) ;%TOTAL QUOTA
SUB T1,RIBUSD##+1(T3) ;% - AMOUNT USED
MOVEM T1,UFBTAL##(T4) ;%=QUOTA LEFT
MOVE T1,RIBSIZ##+1(T3) ;%SIZE OF FILE (IN WORDS)
ADDI T1,BLKSIZ##-1 ;%ACCOUNT FOR PARTIAL BLOCKS
LSH T1,MBKLSH## ;%NO OF BLOCKS WRITTEN
DPB T1,UFZWRT## ;%SAVE IN UFB BLOCK
LDB T1,RIYPRV## ;%GET PRIVS
DPB T1,UFYPRV## ;%SAVE IN UFB
PUSHJ P,FSNPOS ;%POSITION A BIT FOR THIS STR
ORM T2,PPBYES##(P3) ;%INDICATE UFD EXISTS IN THIS STR
ORM T2,PPBKNO##(P3) ;%
JRST SCNUF2 ;%
;HERE WHEN THE UFD HAS BEEN FOUND - SEARCH FOR FILE NAME
SCNUFD: HRRM T2,DEVUFB##(F) ;%SAVE LOC OF UFB
SCNUF2: PUSHJ P,GVCBJ ;%GIVE UP CB RESOURCE
TLO M,UUOUFD## ;INDICATE AT LEAST 1 UFD FOUND FOR USER
PUSHJ P,UFDSRC ;SEARCH UFD FOR DEVFIL,DEVEXT
JRST NOFILE ;FILE NAME DOESNT EXIST IN THIS UFD
PUSHJ P,GETCB ;FOUND. GET CB RESOURCE
TLNE M,UULKRN## ;%ENTER?
JRST SCNUF3 ;%NO
PUSH P,T1 ;%YES, SAVE CFP
PUSHJ P,FSNPOS ;%
POP P,T1 ;%
TDNE T2,NMBKNO##(P4) ;%DO WE KNOW ABOUT FILE?
TDNE T2,NMBYES##(P4) ;%YES, IS IT THERE?
JRST SCNUF3 ;%THIS ENTER IS OK
PUSHJ P,GVCBJ ;%FILE MUST BE IN PROCESS OF RENAME
JRST NOFIL2 ;% SO PRETEND IT ISN'T THERE
SCNUF3: HRRM T1,NMBCFP##(P4) ;%SAVE FILE CFP IN NAME BLOCK
PUSHJ P,FSNPOS ;%SET BIT FOR THIS STR
ORM T2,NMBKNO##(P4) ;%INDICATE FILE EXISTS IN THIS STR
ORM T2,NMBYES##(P4) ;%
MOVEI T2,(P4) ;%POINT T2 TO NMB BLOCK
DPB T1,NMYFSN## ;%SAVE FSN IN NAME BLOCK
JRST FILRRB ;%READ FILE'S RIB
;HERE WHEN FILE WAS NOT FOUND IN UFD
NOFILE: PUSHJ P,FSNPOS ;POSITION A BIT FOR STR NUMBER
NOFIL2: TRNN S,IODTER+IODERR ;IF NO ERROR READING RIB,
ORM T2,NMBKNO##(P4) ;INDICATE WE KNOW ABOUT FILE (IE, IT ISN'T THERE)
TRZE S,IODTER+IOIMPM ;UFD RIB ERROR?
TLNE M,UULKRN## ;YES, ENTER?
JRST SCNSTR ;UFD OK OR NOT ENTER
HRRZ T1,DEVUFB##(F)
SETZM UFBTAL##(T1)
;HERE WHEN AN STR HAS BEEN LOOKED AT - CHECK NEXT
SCNSTR: JRST STRLUP ;TRY NEXT STR
;HERE IF FILE NOT FOUND, OR "WRONG" ONE FOUND
STRDON: TLNN M,UUOSFD## ;FOUND AN SFD?
JRST STRDN0 ;NO
TLO M,UUO2SF## ;YES, INDICATE SECOND TIME AROUND
JRST STRLK1 ;AND TRY AGAIN (WE NOW HAVE ALL AT'S
; FOR THE SFD IN CORE)
STRDN0: TLNN M,UUOUFD## ;WAS ANY UFD SEEN?
JRST FNDER8 ;NO. ERROR RETURN
JUMPL M,FNDER3 ;ERROR IF LOOK UP
;HERE IF FILE NOT FOUND ON AN ENTER
;(MAY HAVE FOUND A FILE IN AN EARLIER STR)
;MAKE SURE NO ACCESS TABLE ENTRY SNUCK IN BY CHECKING NMBYES
;THIS IS LEGAL, SINCE WE KNOW ABOUT THE FILE IN EVERY STR AT THIS POINT
MOVE P2,P1 ;P2=SL PTR
PUSHJ P,GETCB ;GET CB RESOURCE
STRDN1: PUSHJ P,NXSTR ;%GET NEXT STR
JRST STRDN3 ;%YES. A.T. DIDN'T SNEAK IN
HLRZ T2,NMBACC##(P4) ;%LOC OF A.T.
STRDN2: PUSHJ P,BYTSCA ;%FIND A.T. FOR THIS STR
SKIPA T3,ACCSTS##(T2) ;%FOUND - CHECK IT
JRST STRDN1 ;%NOT THERE - CONTINUE
TRNE T3,ACPNIU ;%MARKED FOR DELETION?
JRST STRD2A ;%YES, IT REALLY ISN'T THERE
TLNE M,UUOREN## ;%RENAME?
JRST FNER11 ;%YES, FILE ALREADY EXISTS
TRNE T3,ACPCRE+ACPREN+ACPSUP+ACPUPD;%IS THE SNUCK-IN A.T. READING?
JRST FNDER7 ;%NO - ERROR RETURN
LDB T4,DEYFSN## ;%FORMER SNEAK-IN?
SKIPN T4
DPB T1,DEYFSN## ;%NO, WE'LL SUPERCEDE ON THIS STR - REMEMBER NUMBER
STRD2A: HLRZ T2,ACCNMB##(T2) ;%STEP TO NEXT A.T. IN RING
JRST STRDN2 ;%CHECK NEXT
;HERE WHEN ACCESS TABLE ENTRY DID NOT SNEAK IN. CREATE ONE
STRDN3: TLNE M,UUOREN## ;%RENAME?
JRST RENDN1 ;%YES. MAKE SURE ITS OK
PUSHJ P,CREACC ;%NO. SET UP AN A.T. ENTRY
JRST FNDER1 ;NO TABLE ROOM
HRRM T2,DEVACC##(F) ;%SAVE LOC IN DDB
STRD3A: MOVE T1,NMBACC##(P4) ;%LINK A.T. INTO THIS NMB RING
HRRZ T2,DEVACC##(F) ;%LOC OF A.T.
HRLM T2,NMBACC##(P4) ;%POINT NMB TO THIS A.T.
HLLM T1,ACCNMB##(T2) ;%LINK THIS TO NEXT A.T.
CBDBUG (Y,Y);
LDB T1,DEYFSN## ;%FSN OF ANY READER
JUMPN T1,STRDN4 ;%SUPERSEDE IF FOUND ONE
STRD3B: PUSHJ P,UFBSZ ;%CREATE - PICK AN STR TO WRITE
JRST FNER9A ;%NO ROOM
SKIPA T3,[ACPCRE] ;%INDICATE CREATE
STRDN4: MOVEI T3,ACPSUP ;%INDICATE SUPERSEDE
HRRZ T2,DEVACC##(F) ;%LOC OF A.T.
DPB T1,ACYFSN## ;%SAVE FSN IN A.T.
MOVE P2,T3 ;%SAVE STATUS OF FILE
IORM T3,ACCSTS##(T2) ;%SAVE STATE IN A.T.
REPEAT 0,<
TRC T3,ACPCRE!ACPSUP
ANDCAM T3,ACCSTS##(T2) ;%MAKE SURE EXTRANEOUS BITS ARE CLEAR
>
HRLM T1,P2 ;%SAVE IN LH(P2)
PUSHJ P,SETUFB ;%STORE LOC OF UFB IN DDB
STOPCD .,JOB,NUB, ;++NO UFB BLOCK
SKIPL T3,TABSTR##(T1) ;%STR ADDRESS
SKIPG STRTAL##(T3) ;%ANY ROOM?
JRST STRFUL ;%NO - HAVE TO SUPERSEDE ON ANOTHER STR
SKIPLE UFBTAL##(T2) ;%YES. USER HAVE A QUOTA ON STR?
JRST STRDN5 ;% YES
;HERE WHEN THE UFB HAS NO ROOM (MUST BE SUPERSEDE, CAN'T WRITE ON THIS STR)
STRFUL: DPB T1,DEYFSN## ;%SAVE FSN OF FILE BEING SUPERSEDED
PUSHJ P,UFBSZ ;%FIND A UFB WITH ROOM
JRST FNER9A ;%CANT FIND ANY - ERROR
PUSHJ P,FSNPS2 ;%SET BIT FOR NEW STR
ORM T2,NMBYES##(P4) ;%INDICATE WE KNOW ABOUT FILE,
ORM T2,NMBKNO##(P4) ;% AND THAT IT EXISTS IN NEW STR
JRST STRDN4 ;%SET UP SOME NUMBERS AND FINISH
;HERE WHEN WE HAVE THE UFD WE WANT TO WRITE IN
STRDN5: TRNE P2,ACPSUP ;%SUPERSEDING?
JRST FNDXIT ;%YES. GOOD RETURN
HLRZ U,STRUNI##(T3) ;MAKE SURE DEVUNI IS SETUP
PUSHJ P,STORU## ; FOR GETAC
IFN FTFDAE,<
MOVE T2,DEVACC##(F) ;%IF WE BLOCK WAITING FOR FILDAE
SETZ T1, ; AND USER TYPES ^C, WE DONT WANT FBM ERRORS
DPB T1,ACYFSN## ; SO POINT THE A.T. AT FILE STRUCTURE 0
>
MOVEI T1,FNCCRE## ;%NO. CREATE
PUSHJ P,CHKPRV ;%SEE IF PRIVS ALLOW FUNCTION
JRST FNER2Z ;%NO. ERROR
IFN FTFDAE,<
HLRZ T1,P2 ;%IF THE FILE DAEMON GOT CALLED,
MOVEI T2,DIFNAL##(P4) ; ANOTHER JOB MIGHT HAVE CREATED THE
STRDN6: PUSHJ P,BYTSC1 ; FILE, SO CHECK FOR ACCESS TABLES
JRST [MOVE T3,ACCSTS##(T2) ;%SOMEONE GOT THROUGH - FILE BEING MODIFIED
TRNE T3,ACPDEL##
JRST STRDN6
SKIPN ACCDOR##(T2)
JRST FNER21
JRST .+1]
PUSHJ P,FSNPS2 ;%IF NMBYES=1 FILES HAS BEEN CREATED,
TDNE T2,NMBYES##(P4) ; LOOKED UP, CLOSED
JRST FNER21 ;%SO THIS JOB LOSES
MOVE T2,DEVACC##(F) ;%OK. RESTORE FSN IN AT
DPB T1,ACYFSN##
MOVE T1,TABSTR##(T1) ; IF GAVE UP THE DA RESOURCE
SKIPG STRTAL##(T1) ; SO SOME OTHER JOB COULD HAVE USED IT UP
JRST STRD3B ;%ALL USED UP-TRY ANOTHER STR
>
HLRZ T1,P2 ;%YES. GET FSN
LDB T2,NMXFSN## ;%FSN
CAIN T1,(T2) ;%IS THIS THE STR OF THE CFP?
HLLZS NMBCFP##(P4) ;%YES, ZERO CFP (IT IS NOT CURRENT)
PUSHJ P,STWLK ;LIGHT IOSWLK IF APPROPIATE
JRST FNDXIT ;%GIVE UP CB AND GOOD RETURN
;HERE ON A RENAME WHEN THE FILE HAS NOT BEEN FOUND
RENDN1: HRRZ P2,DEVACC##(F) ;%LOC OF A.T.
MOVE T1,ACCSTS##(P2) ;%STATUS OF FILE
TRNE T1,ACPREN+ACPDEL## ;%FILE BEING RENAMED OR MARKED
; FOR DELETION ALREADY?
JRST FNER14 ;%YES. THIS RENAME IS ILLEGAL
TRNE T1,ACPCRE+ACPSUP+ACPUPD;%NO. CREATE,SUPERSEDE OR UPDATE?
TLNE F,ENTRB ;%YES. IS THIS THE USER DOING IT?
SKIPA T2,P2 ;%YES, LEGAL
JRST FNER14 ;%NO. ERROR
TRZE T1,ACPSUP ;%WAS OLD FILE SUPERSEDING?
TRO T1,ACPCRE ;%YES IT IS NOW A CREATE
MOVEM T1,ACCSTS##(P2) ;%SAVE STATUS
LDB T1,ACYFSN## ;%GET FSN
PUSHJ P,SETUFB ;%SET UP DEVUFB
JRST FNER17 ;%UFB WAS DELETED
MOVE T2,DEVACC##(F) ;%LOC OF A.T. AGAIN
HLRZ T2,ACCNMB##(T2) ;%NEXT IN RING
TRZN T2,DIFNAL## ;%NAME BLOCK?
JRST .-2 ;%NO. TRY NEXT IN RING
HRLM T2,P2 ;%YES. SAVE ITS LOC IN LH(P2)
HRRZ P1,ACCPPB##(P2) ;%OLD PPB LOC
HRRM P3,ACCPPB##(P2) ;%NEW PPB LOC(IF CHANGING DIRECTORIES)
MOVEI T1,FNCCNM## ;%CHANGE-NAME FUNCTION
CAIE P1,(P3) ;%CHANGING DIRS?
MOVEI T1,FNCCRE## ;%YES. SEE IF CREATE IN NEW DIR IS LEGAL
PUSHJ P,CHKPRV ;%IS FUNCTION ALLOWED?
JRST FNER12 ;%NO. ERROR RETURN
CAIN P1,(P3) ;%YES. CHANGING DIRS?
JRST RENDN4 ;%NO
MOVE T2,P2 ;%YES. OLD FSN=NEW FSN
LDB T1,ACYFSN##
HLRZ T2,PPBUFB##(P3) ;%SET TO SCAN FOR THE UFB BLOCK
PUSHJ P,BYTSCA ;%DOES NEW DIRECTORY HAVE UFD IN THIS STR?
SKIPA T1,ACCALC##(P2) ;%YES, GET SIZE OF FILE
JRST FNER13 ;%NO. CANT CHANGE DIRECTORIES
CAMLE T1,UFBTAL##(T2) ;%IS THERE ROOM FOR FILE IN NEW DIRECTORY?
JRST FNER18 ;%NO. CANT CHANGE DIRS.
MOVNS T1 ;%YES
ADDM T1,UFBTAL##(T2) ;%DECREASE QUOTA IN NEW DIR
HRRM T2,DEVUFB##(F) ;%SAVE LOC OF NEW UFB IN DDB
TLZ M,UUOREN## ;%INDICATE CHANGING DIRS BY ZEROING UUOREN
;HERE WHEN NEW DIRECTORY IS SET UP (IF CHANGING)
RENDN4: HRRZ T1,P2 ;%LOC OF A.T.
HLRZ T2,NMBRNG##(P4) ;%IS FILE IN AN SFD?
JUMPE T2,REND4B
LDB T2,ACYCNT## ;%YES, IS READ-COUNT = 1?
SOJG T2,FNER20 ;%NO, CANT DO THE RENAME
REND4B: PUSHJ P,ATNLNK ;%UNLINK IT FROM OLD NMB RING
MOVE T1,NMBACC##(P4) ;%SET TO LINK A.T. INTO RING
HRLM P2,NMBACC##(P4) ;% FOR NEW NAME BLOCK
HLLM T1,ACCNMB##(P2) ;%
CBDBUG (Y,Y);
MOVEI T4,ACPREN ;%INDICATE RENAME IS IN PROGRESS
IORB T4,ACCSTS##(P2) ;%IN A.T.
MOVE T2,P2
LDB T1,ACYFSN## ;%GET FSN
PUSHJ P,FSNPS2 ;%POSITION A BIT FOR NMBYES
HLRZ T3,P2 ;%LOC OF OLD NMB
TRNE T4,ACPCRE ;%IF NOT CREATING,
JRST REND4A
ANDCAM T2,NMBYES##(T3) ;%INDICATE OLD FILE NOT IN THIS STR
REND4A: ORM T2,NMBYES##(P4) ;%INDICATE NEW FILE IS IN STR
MOVE T1,DEVACC##(F)
LDB T1,ACYCNT## ;%NO OF READERS OF FILE
ADDM T1,NMBCNT##(P4) ;%COUNT UP NEW NMB COUNT
SUBI T1,1 ;%COUNT UP NEW PPB COUNT
ADDM T1,PPBCNT##(P3)
MOVNS T1
ADDM T1,PPBCNT##(P1) ;%COUNT DOWN OLD PPB COUNT
SUBI T1,1
ADDM T1,NMBCNT##(T3) ;%COUNT DOWN OLD NMB COUNT
HLLZS NMBCFP##(T3) ;%REMOVE CFP FROM OLD FILE NMB
HRRZ T2,DEVSFD##(F) ;%RAISE NEW SFD
MOVEI T4,1
PUSHJ P,FIXUSE
HLRZ T2,DEVSFD##(F) ;%LOWER OLD SFD
SETO T4,
PUSHJ P,FIXUSE
HLRZ T3,P2 ;%GET OLD NMB BACK
PUSHJ P,GETNMB## ;%BUMP COUNT IF IN SOMEBODY'S PATH
PUSHJ P,FIXPTH##
HLRZ T1,NMBRNG##(T3) ;IF THIS IS AN SFD
JUMPE T1,FNDXIT
TRZE T1,NMPUPT## ; WHICH POINTS TO LOWER NMB'S
JRST FNDXIT
MOVEI T2,NMPUPT##(T3) ;POINT IT AT ITSELF
HRLM T2,NMBRNG##(T3)
HRLM T1,NMBRNG##(P4) ;POINT NEW NMB AT RING
REND4C: MOVE T2,T1 ;FIND THE END OF THIS NMB RING
HLRZ T1,NMBPPB##(T1)
TRZN T1,NMPUPT##
JRST REND4C
MOVEI T1,NMPUPT##(P4) ;POINT THE RING AT THE NEW NMB
HRLM T1,NMBPPB##(T2)
JRST FNDXIT ;%AND EXIT
;ROUTINE TO FIX THE SFD USE COUNTS
;T2 PASSES ADDR OF SFD NMB
;T4 PASSES +1 IF COUNTS NEED TO BE RAISED
;T4 PASSES -1 IF COUNTS NEED TO BE LOWERED
;MUST HAVE CB
;CLOBBERS T1-T4
FIXUSE: JUMPE T2,CPOPJ## ;%GO IF NOT IN AN SFD
PUSHJ P,SAVE1## ;%SAVE P1
MOVE T1,DEVACC##(F) ;%GET ADDR OF ACC
LDB P1,ACYCNT## ;%NUMBER OF PEOPLE USING THE FILE
SOJLE P1,CPOPJ## ;%GO IF WE'RE THE ONLY ONE
IMUL P1,T4 ;%MAGNITUDE AND DIRECTION
ADDM P1,NMBCNT##(T2) ;%BUMP THE SFD NMB
LDB T1,ACZFSN## ;%FSN FILE IS ON
TRO T2,DIFNAL## ;%PRESET PREDECESSOR
PUSHJ P,BYTSC1 ;%SEARCH FOR SFD ACC
SKIPA T3,ACCPPB##(T2) ;%FOUND, GET ADDR OF PPB
POPJ P, ;%NOT FOUND
ADDM P1,PPBCNT##(T3) ;%BUMP THE SFD PPB
LDB T1,ACZCNT## ;%BUMP THE SFD ACC
ADD T1,P1
DPB T1,ACZCNT##
POPJ P,
;HERE WHEN CFP HAS BEEN FOUND FROM NAME BLOCK.
FILRIB:
;ENTER HERE WHEN UFD WAS READ. DEVUFB ALREADY SET UP
FILRRB: HRL P3,NMBCFP##(P4) ;%SAVE CFP FOR THIS NMB
JUMPL M,FILRRA ;IF ENTER,
SKIPL T3,DEVSPL(F) ;IF IN SPOOL MODE,
TROE T3,DEPECS ; OR NON-SUPERSEDING ENTER
PJRST NOSUPR ;SUPERSEDE IS ILLEGAL
FILRRA: PUSHJ P,GVCBJ ;%GIVE UP CB RESOURCE
TLNE M,UUOREN## ;RENAME?
JRST FNDER6 ;YES/A ERROR
HLRZ T1,P3 ;CFP FOR FILE
PUSHJ P,CFP2BK ;CONVERT TO BLOCK NUMBER
JRST FNER16 ;BAD CFP - ERROR RETURN
PUSHJ P,RIBRED## ;READ THE RIB
JRST FNER16 ;RIB ERR - GIVE ERROR RETURN
MOVEM S,DEVIOS(F) ;%
PUSHJ P,GETCB ;GET CB RESOURCE
PUSHJ P,CHEKU## ;%IS STR STILL THERE?
JRST FNR16A ;%
PUSHJ P,FSNPOS ;%POSITION A BIT
TDNN T2,NMBYES##(P4) ;%IS THE FILE STILL THERE?
JRST FNDERB ;%NO, SOMEBODY MUST HAVE DELETED IT
HRLZ T2,NMBCFP##(P4) ;%STILL SAME CFP?
XOR T2,P3
LDB T3,NMXFSN## ;%AND STILL SAME STR?
CAMN T3,T1
TLNE T2,-1
JRST STRLP9 ;%NO
HLRZ T2,NMBACC##(P4) ;%%LOOK AT A.T. ENTRIES
MOVEI T3,DIFNAL##(P4) ;%%PRESET PREDECESSOR
FILRR0: PUSHJ P,BYTSRC ;%%LOOK FOR SNUCK-IN A.T.
JRST FILRR1 ;%CREATED A 1ST HALF - GET MORE CORE
HRLZ T4,ACCSTS##(T2) ;%CURRENT STATUS
TLNN T4,ACPDEL## ;%MARKED FOR DELETION?
JRST FILRRC ;%NO
JUMPGE T4,FILRRD ;%YES, CONTINUE WITH NEXT IF IN UFD
;HERE IF ACPNIU IS ON IN THE A.T. 2 POSSIBILITIES EXIST-
;A) THE FILE IS CURRENTLY BEING DELETED, OR
;B) SOME JOB IS READING A SUPERCEDED VERSION
PUSHJ P,SPTRW## ;%SET FOR FIRST RET POINTER
MOVE T1,1(T1) ;%GET FIRST POINTER (AFTER UNIT-CHANGE)
CAMN T1,ACCPT1##(T2) ;%IS THE FIRST POINTER THE SAME?
JRST FNDERB ;% YES, FILE IS BEING DELETED. GIVE FNF ERR
PUSHJ P,SLGTX ;% NO, A.T. IS FOR A SUPERCEDED VERSION. OK
JRST FILRRD ;% TEST NEXT A.T. IN RING
FILRRC: JUMPG M,SNUKIN ;%NO,SNEAK-IN IF NOT A LOOKUP
TLNN T4,ACPCRE+ACPSUP ;%CREATE OR SUPERSEDE?
JRST SNUKIN ;%NO, SNEAK-IN. TEST IT
FILRRD: MOVE T3,T2 ;%YES, THIS AT OK. RESET PRED.
HLRZ T2,ACCNMB##(T2) ;%STEP TO NEXT A.T. IN RING
JRST FILRR0 ;%KEEP LOOKING FOR SNEAK-INS
;HERE IF AN A.T. DID SNEAK IN
SNUKIN: CBDBUG (Y,Y);
PUSHJ P,SLGTX ;%SET T1=FSN AGAIN
JRST ACCLP1 ;%AND GO TEST IT
;HERE IF NO A.T. SNUCK IN
FILRR1: JUMPLE T2,FILNRM ;%NONE AVAILABLE
HRRM P3,ACCPPB##(T2) ;%SAVE LOC OF PPB
HRRM T2,DEVACC##(F) ;%LOC OF ACC IN DDB
HRRZ T4,.USMBF ;%LOC OF MON BUF(-1)
HRRZ T1,RIBEXT##+1(T4) ;%ACCESS DATE
MOVSM T1,ACCADT##(T2) ;%SAVE IN A.T.
MOVE T1,RIBSIZ##+1(T4) ;%SIZE IN WORDS
ADDI T1,BLKSIZ##-1 ;%
LSH T1,MBKLSH## ;%CONVERT TO BLOCKS
MOVEM T1,ACCWRT##(T2) ;%SAVE IN A.T.
SKIPE T1,RIBSIZ##+1(T4) ;%SIZE IN WORDS
TRNE T1,BLKSIZ##-1 ;%IS THERE A PARTIAL LAST BLOCK?
TRZA T1,BLKSIZ## ;%YES. MAKE SURE TOTAL IS .LT. 200
MOVEI T1,BLKSIZ## ;%NO. SET LENGTH=FULL BUFFER
DPB T1,ACYLBS## ;%
MOVE T1,RIBALC##+1(T4) ;%SPACE ALLOCATED IN WORDS
MOVEM T1,ACCALC##(T2) ;%SAVE IN A.T.
MOVE T1,RIBPRV##+1(T4) ;%DATE AND PRIVS WORD
MOVEM T1,ACCPRV##(T2) ;%SAVE IN A.T.
MOVE T1,RIBSTS##+1(T4) ;%RIB STATUS WORD
TRNN T1,RIPDIR## ;%DIRECTORY FILE?
TDZA T3,T3 ;%NO
MOVEI T3,ACPDIR## ;%YES
TRNE T1,RIPABC## ;%FILE HAVE ALWAYS-BAD CHECKSUM?
TRO T3,ACPABC## ;%YES. LIGHT BIT IN ACC
TRNE T1,RIPNDL## ;%NO-DELETE BIT ON?
TRO T3,ACPNDL## ;%YES
ORM T3,ACCDIR##(T2) ;%SET DIR BIT IN ACC IF A DIRECTORY
TRNN T1,RIPPAL## ;%PRE-ALLOCATED FILE?
TDZA T3,T3 ;%NO
MOVEI T3,ACPPAL## ;%YES
IORM T3,ACCPAL##(T2) ;%SAVE BIT IN A.T.
ADD T4,RIBFIR##+1(T4);%POINT TO 1ST RETRIEVAL POINTER
MOVE T2,1(T4) ;%UN1 WORD
SETZ T1, ;%
DPB T2,UN1PTR## ;%SAVE UN1 IN T1
MOVE T2,2(T4) ;%REAL 1ST POINTER
SKIPN 3(T4) ;%ONLY POINTER?
TRO T1,ACP1PT## ;%YES. LIGHT 1PT
HRRZ T4,DEVACC##(F) ;%LOC OF A.T.
ORM T1,ACCUN1##(T4) ;%SAVE UN1 WORD IN A.T.
MOVEM T2,ACCPT1##(T4) ;%SAVE 1ST POINTER IN A.T.
SETZM DEVRIB##(F) ;%CLEAR DEVRIB FOR DPB'S
LDB T1,UNYLUN## ;%GET LOGICAL UNIT NUMBER
DPB T1,DEYRBU## ;%STORE IN DEVRIB
MOVE T1,UNISTR##(U) ;%POINTER TO STRUCTURE DATA BLOCK
LDB T1,STYCLP##(T1) ;%GET CLUSTER ADDRESS
DPB T1,DEYRBA## ;%STORE IN DEVRIB
CBDBUG (Y,Y);
PUSHJ P,SLGTX ;%GET STR
MOVE T2,DEVACC##(F)
DPB T1,ACYFSN## ;SAVE FSN IN A.T.
HLRZ T1,NMBRNG##(P4) ;%IS THIS AN SFD?
JUMPE T1,FILR1A ;%NO
TLO M,UUOSFD## ;%INDICATE FOUND AN SFD
PUSHJ P,GETNMB##
PUSHJ P,FIXPTH## ;%BUMP COUNT IF IN SOMEBODY'S PATH
PJRST ACLP1A ;%AND LOOK FOR SFD'S ON OTHER STR'S
FILR1A: PUSHJ P,CPYFST ;%COPY FIRST POINTERS INTO DDB, SET DEVBLK ETC
JUMPL M,FNR16A ;%A.T. DATA FOULED UP - RIB ERR IF LOOKUP
;%BUT IGNORE IF ENTER (SUPERSEDE)
HRROI T1,FNCRED## ;%SET UP FUNCTION TO READ
SKIPL M ;%
HRROI T1,FNCSUP## ;%OR SUPERCEDE
PUSHJ P,CHKPRV ;%CHECK PRIVILEGES
JRST FNER2Z ;%NOT RIGHT
;HERE WHEN EVERYTHING IS OK. SET STATE CODE IN A.T. ENTRY
HRRZ T2,DEVACC##(F) ;%LOC OF ACCESS TABLE
JUMPG M,FILRR6 ;%M NEGATIVE IF LOOKUP
;HERE ON A LOOKUP OF A NEWLY CREATED A.T.
TLO S,IOSRDC!IOSRIB ;%THIS FILE HAS READ COUNT UP
MOVEI T3,ACPCNT## ;%INDICATE 1 READER
ADDM T3,ACCSTS##(T2) ;%SAVE STATUS IN A.T.
PUSHJ P,STWLK ;%SET BIT IN S IF STR IS WRITE-LOCKED
JRST FNDXIT ;%RETURN WITH RIB IF A LOOKUP
;HERE ON AN ENTER OF A NEWLY CREATED A.T.
FILRR6: MOVE T1,ACCNDL##(T2)
TRNE T1,ACPNDL## ;%SPECIAL FILE?
JRST FNER2Z ;%YES, ERROR IF ENTER
TRNE T1,ACPDIR## ;UFD?
JRST FNDR10 ;%YES, ERROR IF ENTER
IFN FTFDAE,<
PUSHJ P,TSTAMD ;%A.T. MARKED FOR DELETION?
JRST STRLK1 ;YES, THROW IT AWAY AND START OVER
PUSHJ P,TSTRIT ;%ANOTHER SUPERSEDER SNEAK IN?
JRST FNER21 ;%YES
>
HRRZ T2,DEVACC##(F) ;%GET A.T. BACK
IFN FTFDAE,<
LDB T3,ACZCNT## ;%IF FILDAE WAS CALLED, SOMEBODY
JUMPN T3,ACCLP6 ;% MAY HAVE SNUCK IN
>
;HERE IF THE A.T. WE FOUND IS DORMANT (WE MAY SUPERSEDE IT).
FILRR5: SKIPE T1,ACCDOR##(T2) ;%IS THE A.T. DORMANT?
PUSHJ P,UNLINK ;%YES, MAKE ACTIVE
MOVEI T1,ACRSUP ;%MARK AS SUPERSEDING
DPB T1,ACYSTS## ;%
PUSHJ P,STWLK ;%SET BIT IN S IF STR IS WRITE LOCKED
HRRZ T1,UNISTR##(U) ;%LOC OF STR DATA BLOCK
SKIPLE STRTAL##(T1) ;%IS STR FULL?
PJRST FNDXIT ;%NO, RETURN
MOVE T2,DEVACC##(F) ;%YES
MOVE T3,ACCPAL##(T2) ;%PRE-ALLOCATED FILE
TRNE T3,ACPPAL## ;% WHOSE ALLOCATION WE'LL USE?
PJRST FNDXIT ;%YES, USE THIS STR
LDB T1,ACYFSN## ;%GET FSN OF FILE TO BE SUPERSEDED ON CLOSE
JRST STRFUL ;%FIND NEW STR TO SUPERSEDE ON
REPEAT 0,<
;SUBROUTINE TO CALL SETSRC AND REGAIN CONTROL TO RETURN TEMPORARY SL.
; SO CALLER WONT HAVE TO WORRY ABOUT IT
;
;CALL AND RETURNS ARE IDENTICAL TO SETSRC EXCEPT T3 MODIFIED
GETSRC::PUSHJ P,SETSRC
POPJ P, ;NO TEMP.SL. IF NOSKIP RETURN
MOVE T3,T1
EXCH T3,(P)
PUSHJ P,(T3) ;FORCE CALLER TO RETURN HERE
;HERE WHEN GETSRC CALLER RETURNS TO HIS CALLER
SKIPA ;PROPOGATE SKIP/NOSKIP
AOS -1(P)
EXCH P2,(P) ;GIVE UP POSSIBLE TEMP.SL.
PUSHJ P,SLGVT
POP P,P2
POPJ P,
> ;END REPEAT 0
;SUBROUTINE TO SET UP A SEARCH LIST
;ENTER WITH F=DDB LOC
;EXIT CPOPJ IF NO STRS ARE IN SEARCH LIST
;EXIT CPOPJ1 WITH SEARCH LIST POINTER IN T1
; T3=0 IF NON-TEMPORARY SL., -1 IF TEMPORARY
;NOTE---THE SL. SETSRC GIVES WITH SKIP RETURN MAY BE A TEMPORARY
; WHICH MUST BE GIVEN BACK TO FREE CORE.
; I.E. ALWAYS CALL SLIGIVT AFTER GETTING SKIP RETURN WITH T3=-1
SETSRC::PUSHJ P,SAVE2##
SKIPE T1,DEVLNM##(F) ;LOGICAL NAME?
SKIPA T1,LNRDEV##(T1) ;YES, GET DEVICE FROM FUNNY SPACE
SKIPLE T1,DEVNAM(F) ;PHYSICAL DEVICE NAME
TLNE T1,-1 ; (A DISK IF POSITIVE - IN PTHUUO)
PUSHJ P,ALIASD ;IS NAME AN ALIAS FOR DSK?
SKIPA ;YES
JRST SETSR1 ;NO
PUSHJ P,SLPRF ;GET JOB SL.PTR. (OR SYS.SL. IF NO JOB SL.)
MOVE P1,P2
JRST SETSX0 ;SKIP RETURN
;HERE IF THE USER DOESN'T WANT GENERIC "DSK"
SETSR1: PUSHJ P,SDVTS1## ;IS IT A SPECIAL DEVICE?
JRST SETSR3 ;NO
JUMPE T3,SETSR2 ;YES, IS IT DEVX?
HRLI T1,'DSK' ;YES, MAKE IT DSKX
JRST SETSR3 ;AND SET UP THAT SEARCH-LIST
SETSR2: PUSHJ P,SDSRC ;GET SEARCH LIST
SKIPE P1,T3 ;GET SL.PTR.
JRST SETSX0 ;
PUSHJ P,SLPRF ;USE JOB SL.INSTEAD
MOVE P1,P2 ;
JRST SETSX0 ;
SETSR3: MOVEI T2,.SLMAX ;MAKE A TEMP.SL.
PUSHJ P,SLPRT ;
POPJ P, ;NO FREE CORE - CANT BUILD SEARCH LIST
MOVE P1,P2 ;
PUSHJ P,SRSTR ;IS THIS AN STR NAME?
JRST SETSR4 ;NO, SEARCH UNIT NAMES
MOVE T1,T4 ;YES, APPEND TO SL.
PUSHJ P,SLAPD ;
PUSHJ P,SLXAES ;STOPCD AES IF NO ROOM FOR ONE FS.
JRST SETSX1 ;SET T1 AND RETURN
SETSR4: PUSHJ P,MSKUNI ;SET T2=MASK
PUSHJ P,UNSRCH ;FIND A MATCHING UNIT
PJRST SLGVT ;NONE - EROR RETURN
SETSR5: EXCH T1,T4 ;APPEND FSN. TO SL.
PUSHJ P,SLAPD ;
JRST SETSX1 ;FORGET THE REST IF NO MORE ROOM
EXCH T1,T4
AOBJP T4,SETSX1 ;JUMP IF LOOKED AT ALL FS.S
PUSHJ P,UNSER0 ;CONTINUE AT NEXT STR
JRST SETSX1 ;DONE
JRST SETSR5 ;SAVE FSN, TRY NEXT STR
SETSX0: ;HERE TO RETURN WITHOUT A TEMP SL.
TDZA T3,T3 ;T3=0 FOR NO TEMP.SL.
SETSX1: ;HERE TO RETURN WITH A TEMP SL.
SETO T3, ;T3=-1 FOR TEMP.SL.
MOVE T1,P1 ;
JRST CPOPJ1## ;SKIP RETURN
;SUBROUTINE TO FIND A MATCHING UNIT(SEARCHES ONE STR AT A TIME)
;ENTER WITH T1=NAME T2=MASK J=JOB NUMBER (J=J)
;EXIT CPOPJ IF NOT FOUND
;EXIT CPOPJ1 IF FOUND, WITH T1=NAME, T2=MASK,T3=UNIT DB LOC, T4=STR NUMBER
UNSRCH::
MOVE T4,STRAOB## ;AOBJN WORD FOR TABSTR
;SUBROUTINE TO FIND A MATCHING UNIT
;SAME ARGUMENTS, VALUES AS ABOVE EXCEPT ENTER HERE IF T4 ALREADY SET UP
UNSER0::PUSH P,T1 ;SAVE NAME
UNSRC1: SKIPG T1,TABSTR##(T4) ;GET STR DB LOC
JRST UNSRC3 ;THIS STR NOT IN USE
HLRZ T3,STRUNI##(T1) ;LOC OF 1ST UNIT IN STR
UNSRC2: MOVE T1,UNINAM##(T3) ;UNIT PHYSICAL NAME
AND T1,T2 ;MASK IT
CAMN T1,(P) ;MATCH?
PJRST TPOPJ1## ;YES, TAKE GOOD RETURN
MOVE T1,UNILOG##(T3) ;NO. LOGICAL UNIT NAME
AND T1,T2 ;MASK IT
CAMN T1,(P) ;MATCH?
PJRST TPOPJ1## ;YES, TAKE SKIP-RETURN
HLRZ T3,UNISTR##(T3) ;NO. STEP TO NEXT UNIT
JUMPN T3,UNSRC2 ;TEST IT
UNSRC3: AOBJN T4,UNSRC1 ;STEP TO NEXT STR AND TEST
JRST TPOPJ## ;ALL DONE - NO MATCH
;SUBROUTINE TO SET UP A SEARCH-MASK FOR A NAME
;ENTER WITH T1 =NAME
;EXIT WITH T1=NAME, T2=MASK
MSKUNI::SKIPN T2,T1 ;GET NAME
POPJ P, ;NOT A NAME - RETURN MASK =0
MOVSI T3,770000 ;SET UP MASK
PUSH P,T1 ;SAVE VALUE
UNIMS1: TDOE T2,T3 ;MASK T2
TDZ T1,T3 ; WHILE WE EMPTY T1
LSH T3,-6 ;SHIFT MASK
JUMPN T1,UNIMS1 ;LOOP TILL GONE
JRST TPOPJ## ;RESTORE AND RETURN
;SUBROUTINE TO SET A BIT ACCORDING TO FSN FOR CORKNO, CORYES
;ENTER WITH P2= SL PNTR
;EXIT WITH FSN IN T1, BIT IN T2
FSNPOS: PUSHJ P,SLGTA ;%GET FSN
TDZA T1,T1 ;STR REMOVED, RETURN 0
;FSNPS SAME AS FSNPS2, PRESERVES T3
FSNPS::
FSNPS2::MOVE T2,FSNBIT## ;%BIT FOR 1ST STR
LSH T2,-.FSMIN(T1) ;%POSITION IT FOR THIS STR
POPJ P, ;%AND RETURN
;SUBROUTINE TO RETURN SEARCH LIST FOR SPECIAL DEVICES
;CALL WITH T2=INDEX INTO SDVTBL
;RETURNS T3=BYTE POINTER TO LIST
;PRESERVES T1,T2
SDSRC: HRRZ T3,SDVTBL##(T2) ;BIT FOR WHICH S.L.
CAIN T3,PT.SSL## ;SYS?
MOVE T3,SYSSRC## ;YES
CAIN T3,PT.ASL## ;ALL?
MOVE T3,ALLSRC## ;YES
TLNN T3,-1 ;VALID BYTE POINTER?
SETZ T3, ;NO, RETURN ZERO
POPJ P,
;SUBROUTINE TO REMOVE AN ACCESS TABLE FROM THE SYSTEM
;ENTER WITH T1=LOC OF A.T.
;ENTER AT ATRMVX WITH CB, L(AT) IN T2
;REMCB (STRUUO) CALLS THIS WITH F=0 & THE CB RESOURCE
ATRMOV::MOVE T2,T1 ;LOC OF A.T. INTO T2
PUSHJ P,GETCBX ;GET CB RESOURCE
ATRMVX::SKIPE T1,ACCDOR##(T2) ;%IS A.T. DORMANT?
PUSHJ P,UNLINK ;%YES. UNLINK FROM DORMANT RING
MOVE T1,T2 ;%RESTORE A.T. LOC TO T1
PUSHJ P,ATNLNK ;%UNLINK A.T. FROM NMB RING
PJUMPE F,ATSFR0 ;%IF CALLED BY REMCB (STRUUO)
HRRZ T2,DEVACC##(F) ;%A.T. FOR THIS DDB
CAIN T2,(T1) ;%DID WE JUST REMOVE IT?
HLLZS DEVACC##(F) ;%YES - CLEAR DEVACC
CBDBUG (Y,Y);
PJRST ATSFR0 ;%PUT INTO FREE CORE LIST AND RETURN
;SUBROUTINE TO REMOVE AN ITEM FROM THE DORMANT ACCESS TABLE RING
;ENTER WITH T1=ACCDOR ENTRY TO BE UNLINKED, T2=LOC OF A.T.
;RETURNS T2 = LOC OF A.T.
UNLINK::HRRZ T3,T1 ;%PREDECESSOR IN DORMANT LIST
CAIN T3,SYSDOR## ;%=SYSDOR?
SUBI T3,ACCDOR## ;%YES. DONT STORE IN SYSDOR+ACCDOR
HLLM T1,ACCDOR##(T3) ;%RESET FORWARD LINK IN PREDECESSOR
MOVSS T1 ;%NEXT ENTRY IN LIST
TRNE T1,-1 ;%IS THERE ONE?
HLRM T1,ACCDOR##(T1) ;%RESET BACKWARD LINK IN NEXT A.T. ENTRY
SETZM ACCDOR##(T2) ;%INDICATE NOT DORMANT NOW
CBDBUG (Y,Y);
POPJ P, ;%AND RETURN
;SUBROUTINE TO PUT AN A.T. ON THE DORMANT LIST
;ENTER WITH T1=LOC OF ACCESS TABLE
;MAY ENTER WITH CB, F=0
ATSDRA::CBDBUG (Y,N)
HLRZ T2,SYSDOR## ;%FORMER 1ST J IN DORMANT LIST
HRLM T1,SYSDOR## ;%THIS A.T. IS NOW 1ST
SKIPE T2 ;%IS THERE A DORMANT A.T. ALREADY?
HRRM T1,ACCDOR##(T2) ;%YES,SAVE AS PRED. TO FORMER 1ST A.T.
HRLI T2,SYSDOR## ;%PRED TO THIS A.T. IS SYSDOR
MOVSM T2,ACCDOR##(T1) ;%THIS A.T. POINTS TO SYSDOR AND NEXT A.T.
CBDBUG (Y,Y);
JRST GVCBJX ;%GIVE UP CB AND RETURN
;SUBROUTINE TO PUT AN A.T. ON THE FREE CORE LIST
;ENTER WITH T1=LOC OF A.T.
;CAN GET HERE WITH F=0&CB RESOURCE (SEE ATRMOV)
ATSFR0::SKIPE ACCDOR##(T1) ;%ALREADY DORMANT?
STOPCD .,JOB,BAD, ;++BLOCK ALREADY DORMANT
PUSHJ P,GVCOR ;%RETURN THE CORE BLOCK
PJRST GVCBJX ;%GIVE UP CB AND RETURN
;SUBROUTINE TO UNLINK AN ACCESS TABLE FROM AN NMB RING
;ENTER WITH T1=LOCATION OF THE ACCESS TABLE
;EXIT T1=LOC OF A.T., T2=LOC OF PREDECESSOR, T3=LOC OF NEXT IN RING
ATNLNK::SKIPE ACCDOR##(T1) ;%A.T. DORMANT?
STOPCD .+1,DEBUG,AAD, ;++A.T. ALREADY DORMANT
HRRZ T2,T1 ;NO, LOC OF A.T.
MOVE T4,CORNUM## ;GET A LIMIT FOR RING TRIES
ATNLN1: HLR T2,ACCNMB##(T2) ;NEXT A.T.
HLRZ T3,ACCNMB##(T2) ;GET ITS LINK
CAIN T3,(T1) ;IS ITS LINK THIS A.T.?
JRST ATNLN2 ;YES
SOJGE T4,ATNLN1 ;TRY ANOTHER RING
STOPCD .+1,DEBUG,ARM ;ACCESS RINGS ALL MESSED UP
ATNLN2: HLRZ T3,ACCNMB##(T1) ;YES.LINK AROUND THIS A.T.
HRLM T3,ACCNMB##(T2) ;% (THIS LINK INTO PREDECESSOR)
CBDBUG (Y,Y);
POPJ P, ;%AND RETURN
;SUBROUTINE TO RETURN A CORE BLOCK TO THE FREE CHAIN
;CALL WITH T1=LOC OF BLOCK
GVCOR: MOVE T2,SYSCOR## ;%OLD 1ST BLOCK
HRLM T1,SYSCOR## ;%THIS IS 1ST ON CHAIN NOW
HLLM T2,CORLNK##(T1) ;%LINK IT TO FORMER FIRST
POPJ P, ;%AND RETURN
;SUBROUTINE TO SEARCH A LIST FOR AN STR BYTE
;ENTER WITH CB RES & T1=BYTE(FSN), T2 = WHERE TO LOOK
;IF T2 MAY BE 0 ON ENTRY, SET T3 = LOC OF PREDECESSOR
;EXITS WITH SAME VALUES AS LSTSRC (NEXT PAGE)
BYTSRC: PUSHJ P,BYTSCA ;%SEARCH FOR MATCHING STR BYTE
JRST CPOPJ1## ;%FOUND
PJRST LSTSR2 ;%NO MATCH-CREATE ONE
;SUBROUTINE TO SEARCH FOR AN STR BYTE
;RETURNS CPOPJ IF FOUND WITH T1 UNCHANGED, T2=LOC OF BLOCK
;CPOPJ1 IF NOT FOUND WITH T3=PREDECESSOR, T2=LOC OF NMB(IF A.T.), OR 0
;ENTER WITH, AND ALWAYS RETURNS WITH CB RESOURCE
BYTSC0: LDB T4,COYFSN## ;%FSN OF BLOCK
CAIN T1,(T4) ;%MATCH?
POPJ P, ;%YES. NON-SKIP RETURN
;HERE TO START SEARCH AT NEXT ITEM IN LIST
BYTSC1::MOVE T3,T2 ;%NO. SAVE PREDECESSOR
HLRZ T2,CORLNK##(T2) ;%STEP TO NEXT BLOCK
BYTSCA::BYTSCN::
TRNN T2,DIFNAL## ;%END? (SINCE FREE-CORE ADRS. ARE ALWAYS
; 0 MODULO 4, THE ONLY TIME THIS BIT COULD
; BE ON IS IN A LINK FROM AN A.T. TO ITS NMB)
JUMPN T2,BYTSC0 ;%NO. TEST IT
JRST CPOPJ1## ;%END - NOT-FOUND RETURN
;SUBROUTINE TO SCAN A LIST
;ENTER, EXIT WITH SAME ARGUMENTS AS LSTSRC EXCEPT:
;DONT CREATE A NEW BLOCK IF THE BLOCK WANTED WAS NOT FOUND
LSTSCN::SETO T3, ;%INDICATE DONT CREATE NEW BLOCK
;SUBROUTINE TO SEARCH A LIST
;ENTER WITH CB RES & NAME IN T1, WHERE TO LOOK IN T2
;IF T2 MAY BE 0 ON ENTRY, SET T3= LOC OF PREDECESSOR
;IF LH(T3)=-1, DONT CREATE A NEW BLOCK IF NOT FOUND
;IF LH(T3)=0, CREATE A NEW BLOCK
;RETURNS LOC OF BLOCK IN T2, PREDECESSOR IN T3
;RETURNS CPOPJ IF JUST CREATED A BLOCK OR NO FREE CORE.
; (T2=0 IF NO FREE CORE)
;RETURNS CPOPJ1 IF FOUND
;ALWAYS RETURNS WITH CB RESOURCE
LSTSRC::JUMPE T2,LSTSR3 ;%NO MATCH IF T2=0
LSTSR0: CAMN T1,CORNAM##(T2) ;%MATCH?
JRST CPOPJ1## ;%YES. SKIP-RETURN
;HERE TO START SEARCH AT NEXT J IN LIST
LSTSR1: HRR T3,T2 ;%SAVE PREDECESSOR
HLRZ T2,CORLNK##(T2) ;%STEP TO NEXT BLOCK
LSTSRA::TRNN T2,DIFNAL## ;%END? (SINCE FREE-CORE ADRS. ARE ALWAYS
; 0 MODULO 4, THE ONLY TIME THIS BIT COULD
; BE ON IS IN A LINK FROM AN A.T. TO ITS NMB)
JUMPN T2,LSTSR0 ;%NO. TEST THIS BLOCK IF IT EXISTS
LSTSR3: JUMPL T3,CPOPJ## ;%EXIT IF DONT WANT NEW BLOCK CREATED
;HERE WHEN DESIRED ITEM IS NOT ON LIST, CREATE NEW BLOCK
LSTSR2: PUSHJ P,GTCOR ;%GET FREE SPACE
JUMPLE T2,CPOPJ## ;%NO FREE CORE
MOVE T4,CORLNK##(T3) ;%LINK WORD OF PREDECESSOR
HRLM T2,CORLNK##(T3) ;%PREDECESSOR TO THIS BLOCK
HLLM T4,CORLNK##(T2) ;%LINK THIS BLOCK TO NEXT
MOVEM T1,CORNAM##(T2) ;%SAVE NAME IN BLOCK
POPJ P, ;%NON-SKIP RETURN
;SUBROUTINE TO GET THE CB RESOURCE
;ALL ACS PRESERVED
GETCBX::JUMPE F,CPOPJ## ;ALREADY HAVE CB OF F=0
GETCB:: SKIPE DINITF## ;IF IN ONCE-ONLY,
POPJ P, ; RETURN IMMEDIATELY
PUSH P,J ;SAVE AN AC
MOVE J,.CPJOB## ;LOAD THIS JOB
CAMN J,CBUSER## ;DOES HE HAVE CB?
STOPCD JPOPJ##,DEBUG,AOC, ;++ ALREADY OWN CB
POP P,J ;NO, RESTORE AC AND
PJRST CBWAIT## ;CALL THE SCHEDULER
;SUBROUTINE TO GIVE UP CB RESOURCE AND RETURN
;ALL ACS RESPECTED
GVCBJ1::AOSA (P) ;%SET FOR SKIP RETURN
GVCBJX::JUMPE F,CPOPJ## ;DON'T RETURN CB IF F=0
GVCBJ:: SKIPE DINITF## ;%IF IN ONCE-ONLY.
POPJ P, ;%RETURN IMMEDIATELY
CBDBUG (Y,N)
PUSH P,J ;SAVE AN AC
MOVE J,.CPJOB## ;LOAD THIS JOB
CAME J,CBUSER## ;MAKE SURE WE HAVE CB ALREADY
STOPCD JPOPJ##,DEBUG,DOC, ;++ DON'T OWN CB
POP P,J ;OK, RESTORE THE AC
PJRST CBFREE## ;%OTHERWISE CALL THE SCHEDULER
;SUBROUTINE TO GET 4 WORDS OF FREE CORE
;IT IS ASSUMED THAT T3 POINTS TO AN UNAVAILABLE CORE BLOCK (IT MAY NOT)
;RETURNS LOCATION IN T1. T2=0 IF NO FREE CORE
;RETURNS WITH THE CORE BLOCK ZEROED
;JOB MUST HAVE CB RESOURCE WHEN ROUTINE IS CALLED
;T1 AND T3 RESPECTED
FSTIME==1 ;FIRST TIME THROUGH NMB LIST
FOUNDN==2 ;FOUND AT LEAST 1 NMB THE 1ST TIME THROUGH
GTCOR: CBDBUG (Y,Y);
HLRZ T2,SYSCOR## ;%1ST FREE BLOCK ON LIST
JUMPN T2,GTCOR2 ;%THER IS FREE CORE IF NON-0
PUSH P,T1 ;%NO FREE CORE - SAVE T1
PUSH P,T3 ;%SAVE T3
;HERE TO GRAB A DORMANT CORE BLOCK AND PUT IT ON THE FREE CORE LIST
;THE CORE BLOCK POINTED TO BY T3 WILL NOT BE TAKEN
HLRZ T2,SYSDOR## ;%1ST A.T. ON DORMANT LIST
SETZ T4, ;%T3 WILL CONTAIN THE LAST A.T. FOUND
CORGR0: JUMPE T2,CORGR1 ;%SCANNED ALL A.T.'S IF 0
IFN FTFDAE,<
MOVE T1,ACCCNT##(T2) ;%READ-COUNT COULD BE UP
TRNN T1,ACMUCT## ;% WHILE JOB WAITING FOR
;% FILDAE TO BLESS IT - IGNORE THE A.T.
>
CAIN T2,(T3) ;%IS THIS THE ONE WE CANT TAKE?
JRST CORG0D ;%YES, TRY ANOTHER
MOVE T1,T2 ;%GET NMB FOR THIS A.T.
PUSHJ P,GTNM1## ;%
MOVE T3,NMBNAM##(T1)
HRRZ J,NMBEXT##(T1) ;%PRESERVE SWITCH.INI
CAMN T3,[SIXBIT /SWITCH/]
CAIE J,'INI'
CAIA
JRST CORG0C ;%CAUSE EVERYONE READS IT
HLRZ T3,NMBRNG##(T1) ;%IS IT AN SFD?
JUMPE T3,CORG0B ;%NO
JUMPN T4,CORG0C ;%YES, DONT USE IT IF FOUND ANY AT'S
SKIPN NMBCNT##(T1) ;%IS SOMEBODY INSIDE FNDFIL?
TRNN T3,NMPUPT## ;%IS IT POINTING TO ANOTHER LIST?
JRST CORG0C ;%YES, CANT USE IT
HLRZ T1,NMBACC##(T1) ;%NO, LOOK AT ALL AT'S ON THE NMB
MOVEI T3,ACMUCT## ;%
CORG0A: TDNE T3,ACCUSE##(T1) ;%IS THE READ-COUNT UP?
JRST CORG0C ;%YES, CANT USE IT
HLRZ T1,ACCNMB##(T1) ;%NO, TRY NEXT AT
TRNN T1,DIFNAL## ;%
JRST CORG0A ;%
CORG0B: SKIPA T3,(P) ;%THIS AT IS USABLE
CORG0C: SKIPA T3,(P) ;%THIS AT ISN'T USABLE
MOVE T4,T2 ;%NO, SAVE ITS LOC
CORG0D: HLRZ T2,ACCDOR##(T2) ;%STEP TO NEXT A.T. IN DORMANT LIST
JRST CORGR0 ;%AND TEST IT
CORGR1: SKIPN T2,T4 ;%FOUND ANY A.T.?
JRST CORGR4 ;%NO - TAKE AN NMB
MOVE T1,ACCDOR##(T2) ;%YES. GET PRED, SUCCESSOR ON DORMANT LIST
PUSHJ P,UNLINK ;%UNLINK THIS A.T. FROM DORMANT LIST
MOVE T1,T2 ;%LOC OF A.T. INTO T2
;HERE WHEN A DORMANT A.T. IS FOUND.
PUSHJ P,ATNLNK ;%UNLINK THIS A.T. FROM RING
HRLM T1,SYSCOR## ;%SAVE THIS A.T. ON FREE CORE LIST
SETZM CORLNK##(T1) ;%INDICATE THIS IS THE END
JRST GTCOR1 ;%AND CONTINUE
;HERE IF THERE ARE NO DORMANT ACCESS TABLE ENTRIES
CORGR4: PUSH P,P3 ;%SAVE P3
HRRZ T1,SYSPPB## ;%WHERE TO START SCAN
SKIPN T1 ;%IF 0 START AT 1ST PPB IN SYS
HLRZ T1,SYSPPB## ;%1ST PPB BLOCK
MOVE P3,T1 ;%SAVE FOR END TEST
CORGR5: HLRZ T2,PPBNMB##(T1) ;%FIRST NMB FOR PPB
JUMPE T2,CORGR7 ;%NONE IF 0
HRLI P3,DIFPNL##(T1) ;%LH(P3) WILL CONTAIN PREDECESSOR
CORGR6: HLRZ T4,NMBRNG##(T2) ;%POINTER TO SFD LIST
JUMPE T4,CORG6A ;%GO IF NOT AN SFD
EXCH T2,T4 ;%SFD. DOES IT POINT TO ANOTHER LIST?
TRZE T2,NMPUPT## ;%
JRST CORG6A ;%NO, USE IT
HRLI P3,DIFNMC##(T4) ;%YES, GO DOWN THAT LIST
JRST CORGR6 ;%
CORG6A: SKIPN NMBCNT##(T2) ;%ANY USERS OF THE NMB?
CAIN T2,(T3) ;%NO, IS IT THE ONE WE CANT TAKE?
JRST CORG6B ;%YES. TRY NEXT NMB
MOVE T4,NMBACC##(T2)
TLNE T4,DIFNAL## ;%NO. ARE THERE A.T.'S ON THE NMB?
JRST CORGR8 ;%NO - AVAILABLE - USE IT
CORG6B: HRLM T2,P3 ;%SAVE PREDECESSOR
HLRZ T2,NMBPPB##(T2) ;%AND STEP TO NEXT NMB IN PPB
TRZE T2,NMPUPT## ;POINTING TO ANOTHER LIST?
JRST CORG6B ;YES, SCAN IT
JUMPN T2,CORGR6 ;%TEST IT IF NOT 0
;HERE WHEN THERE ARE NO DORMANT NAME BLOCKS IN THIS PPB
CORGR7: TLON T1,FSTIME ;%1ST TIME THROUGH?
TLNN T1,FOUNDN ;%YES. ANY NMB AT ALL FOUND?
SKIPA ;%NO.
JRST CORGR5 ;%YES. TAKE AN NMB WHICH POINTS TO A REAL FILE
HLRZ T1,PPBSYS##(T1) ;%STEP TO NEXT PPB IN SYSTEM
SKIPN T1 ;%IF END OF PPBS
HLRZ T1,SYSPPB## ;% START AT THE FIRST AGAIN
CAIE T1,(P3) ;%BACK TO WHERE WE STARTED?
JRST CORGR5 ;%NO. TEST THE NMB BLOCKS
JRST CORGR9 ;%YES. NONE AVAILABLE
;HERE WITH T2 = LOC OF GRABBABLE NMB
CORGR8: MOVE T3,NMBNAM##(T2) ;%NAME.EXE
HRRZ T4,NMBEXT##(T2)
CAMN T3,[SIXBIT /SWITCH/]
CAIE T4,'INI' ;%SWITCH.INI?
SKIPA T4,ALLYES## ;%NO. DOES THE FILE EXIST?
JRST CORG8A ;%YES, DON'T DELETE NMB IF WE CAN HELP IT
TDNE T4,NMBYES##(T2)
CORG8A: TLNE T1,FSTIME ;%YES. 1ST TIME THROUGH?
JRST CORG8B ;%NO. USE IT
TLO T1,FOUNDN ;%YES. INDICATE AT LEAST 1 NMB FOUND
MOVE T3,-1(P)
JRST CORG6B ;AND LOOK FOR AN UNUSED NMB
CORG8B: HLRZS P3 ;%LOC OF PREDECESSOR
MOVE T3,NMBPPB##(T2) ;%LINK WORD OF THIS BLOCK
HLLM T3,NMBPPB##(P3) ;%SAVE IN PREDECESSOR LINK
HRLM T2,SYSCOR## ;%SAVE THIS ADR. IN FREE CORE LIST
SETZM CORLNK##(T2) ;%MAKE SURE LINK=0
HLRZ T1,PPBSYS##(T1) ;%START AT NEXT PPB WHEN
HRRM T1,SYSPPB## ;% NEXT GRABBING NMB BLOCKS
CORGR9: POP P,P3 ;%RESTORE P3
GTCOR1: POP P,T3 ;%RESTORE T3
POP P,T1 ;%AND T1
SKIPN T2,SYSCOR## ;%FOUND ANY FREE CORE?
JRST CPOPJ## ;%NO. RETURN
HLRZ T2,SYSCOR## ;%YES, FIRST FREE LOC
;HERE WITHH T2= LOC OF FIRST FREE CORE BLOCK
GTCOR2: MOVE T4,CORLNK##(T2) ;%THIS BLOCKS LINK
HLLM T4,SYSCOR## ;%LINK AROUND THIS BLOCK
SETZM (T2)
MOVSI T4,(T2)
HRRI T4,1(T2) ;%ZERO THE CORE BLOCK JUST OBTAINED
BLT T4,CRWDM1##(T2)
CBDBUG (Y,Y);
MOVE J,.CPJOB##
POPJ P, ;%AND RETURN
;SUBROUTINE TO SET INITIAL VALUES INTO DDB
;ENTER WITH RIB IN MONITOR BUFFER
;EXIT WITH PNTRS IN DDB, DEVREL,DEVBLK,DEVLFT,DEVRSU,DEVRLC,DEVUNI SET UP
;EXIT CPOPJ IF RIB RETR. DATA IS FOULED UP, CPOPJ1 IF OK
CPYFST::PUSHJ P,SPTRW## ;SET AN AOBJN WORD FOR POINTERS
MOVEI T2,0 ;DEVRLC WILL BE SET 0
PUSHJ P,PTRBL1## ;COPY 1ST POINTERS TO DDB
MOVE T2,DEVRB1##(F) ;1ST UNIT
TRZ T2,RIPNUB## ;ZERO THE BIT WHICH IS ALWAYS ON
PUSHJ P,NEWUNI## ;SET IN U, DEVUNI(F)
PJRST RIBERR## ;INVALID UNIT!
HRLM U,DEVUNI##(F) ;SAVE UNIT OF RIB
MOVE T2,DEVRB2##(F) ;FIRST REAL RETRIVAL POINTER
AOS DEVRET##(F) ;POINT DEVRET TO DEVRB2
PUSHJ P,CNVPTR## ;CONVERT TO ADDRESS, COUNT
JFCL ;BAD UNIT CHANGE PNTR
PJRST RIBERR## ;IT HAS TO BE A REAL POINTER!
SUBI T1,1 ;SUBTRACT 1 FROM COUNT (FOR RIB)
HRRM T1,DEVLFT##(F) ;SAVE IN DDB
AOS DEVBLK##(F) ;BUMP BLOCK BY 1 (FOR RIB)
MOVSI T1,1 ;AT 1ST RELATIVE BLOCK IN FILE
MOVSM T1,DEVREL##(F) ;SAVE RELATIVE BLOCK IN DDB
SETZM DEVFLR##(F) ;1ST BLOCK IN PTR WINDOW IS 0
HRRM U,DEVFUN##(F) ;UNIT OF RIB IS CORRESPONDING 1ST UNIT
TLO S,IOSFIR ;INDICATE HAVE TO COMPUTE CHECKSUM
AOS (P) ;SET FOR SKIP-RETURN
ADDM T1,DEVRSU##(F) ;FIX DEVRSU
PJRST STOIOS## ;AND RETURN
;SUBROUTINE TO SET EXTENDED RIB INITIAL VALUES INTO DDB
;ENTER WITH EXTENDED RIB IN MONITOR BUFFER
;EXIT WITH POINTERS IN DDB, DEVREL,DEVBLK,DEVLFT,DEVRSU,DEVRLC,DEVUNI SET UP
;EXIT CPOPJ IF THE RIB IS SCREWED UP, CPOPJ1 IF OK
CPYEXT::PUSHJ P,SPTRW## ;SET UP AOBJN WORD FOR POINTERS
MOVEI T2,0 ;DEVRLC WILL BE 0
PUSHJ P,PTRBL1## ;COPY FIRST POINTERS TO DDB
MOVE T2,DEVRB1##(F) ;GET FIRST RETRIEVAL POINTER IN DDB
PUSHJ P,CNVPTR## ;CONVERT TO ADDRESS,COUNT
JRST RIBERR## ;BAD UNIT-CHANGE POINTER
SKIPA T2,DEVRB2##(F) ;UNIT CHANGE POINTER, GET NEXT
JRST CPYEX1 ;WAS A VALID RETRIEVAL POINTER
AOS DEVRET##(F) ;POINT TO NEXT POINTER
MOVSI T1,1 ;BUMP DEVRSU TO COUNT
ADDM T1,DEVRSU##(F) ; THE UNIT-CHANGE PTR
PUSHJ P,CNVPTR## ;CONVERT THIS POINTER
JFCL
JRST RIBERR## ;MUST BE A VALID PNTR, SO RIB IS FOULED UP
CPYEX1: SUBI T1,1 ;SUBTRACT ONE FROM COUNT (FOR RIB)
HRRM T1,DEVLFT##(F) ;AND STORE IN DDB
AOS DEVBLK##(F) ;ACCOUNT FOR RIB IN BLOCK NUMBER
MOVE T2,.USMBF ;IOWD FOR MONITOR BUFFER
MOVE T1,RIBFLR##+1(T2) ;GET FIRST BLOCK NUMBER IN RIB
MOVEM T1,DEVFLR##(F) ;AND STORE IN DDB
HRRM U,DEVFUN##(F) ;SET FIRST UNIT WORD TO CURRENT UNIT
TLO S,IOSFIR ;INDICATE HAVE TO COMPUTE CHECKSUM
JRST CPOPJ1##
;SUBROUTINE TO SET UP DEVBLK,DEVREL, ETC. FROM ACCESS TABLE DATA
;ENTER WITH T3= LOC OF ACC
;EXIT WITH DDB STUFF SET UP
;EXIT CPOPJ1 IF OK, CPOPJ IF A.T. STUFF FOULED UP
AT2DDB::MOVE T1,ACCUN1##(T3) ;UN1 WORD
MOVE T2,ACCPT1##(T3) ;1ST POINTER
PUSHJ P,SETFS0 ;SET DEVBLK, ETC FROM 1ST POINTER
POPJ P, ;A.T. BAD
AOS DEVBLK##(F) ;ADD 1 FOR RIB
AOS DEVREL##(F) ;SET DEVREL AT 1 (0 IS FOR RIB)
PJRST CPOPJ1## ;AND RETURN
;SUBROUTINE TO SCAN A DIRECTORY FOR A FILE NAME
;THE DIRECTORY IS SPECIFIED BY DEVUFB(F), THE FILE BY DEVNAM,DEVEXT
;EXIT CPOPJ IF FILE NOT FOUND
;EXIT CPOPJ1 IF FOUND WITH T1=CFP, T3=LOC OF DIRECTORY ENTRY
;DEVBLK HAS THE NUMBER OF THE DIRECTORY BLOCK, DEVSFU IS SET UP
UFDSRC::PUSHJ P,DIRSET ;GET RETRIEVAL INFORMATION
JRST UFDLP2 ;DIRECTORY WAS DELETED - ERROR RETURN
PUSHJ P,SETFS0 ;SET UP TO READ DIRECTORY
POPJ P, ;CANT READ DIRECTORY - RETURN
PUSHJ P,GTMNBF## ;GET MONITOR BUFFER IF DON'T HAVE IT
PUSHJ P,UFORSS ;GET UFB OR SFD AT
TRZE T3,NMPSFU##
SKIPA T3,ACCWRT##(T3)
LDB T3,UFYWRT## ;GET CURRENT LENGTH
PUSH P,T3 ;SAVE SAME
UFDLUP: PUSHJ P,DIRRED ;READ DIRECTORY BLOCK(S)
JRST UFDLP1 ;EOF - FILE DOESNT EXIST
MOVE T1,DEVFIL(F) ;FILE NAME
HLRZ T2,DEVEXT(F) ;FILE EXTENSION
PUSHJ P,DIRSCN ;SEARCH BLOCK FOR MATCH
JRST UFDLUP ;NOT FOUND - READ NEXT DIRECTORY BLOCK
JRST T2POJ1## ;FOUND. TAKE SKIP RETURN
UFDLP1: PUSHJ P,UFORSS ;GET UFB OR SFD AT
POP P,T1 ;GET INTIAL VALUE
TRZE T3,NMPSFU##
SKIPA T3,ACCWRT##(T3)
LDB T3,UFYWRT## ;GET CURRENT LENGTH
CAMLE T1,T3 ;IF UFD IS SMALLER NOW
JRST UFDSRC ;SEARCH AGAIN
UFDLP2: TLZ S,IOSRIB ;RIB IS NOT IN MONITOR BUFFER
PJRST STOIOS## ;SAVE S AND RETURN
;SUBROUTINE TO GET L(UFB OR SFD A.T.)
;SAME ARGS, VALUES AS UFORSF; HALTS IF NO LOC, RETURNS CPOPJ NORMALLY
UFORSS::PUSHJ P,UFORSF
BNTSTP::STOPCD CPOPJ##,DEBUG,BNT, ;++BLOCK NOT THERE
POPJ P,
;SUBROUTINE TO GET L(UFB OR SFD)
;RETURNS CPOPJ1, T4=LOC
;RESPECTS T1-T3
UORSS: PUSHJ P,SAVT## ;SAVE T ACS
PUSHJ P,UFORSS ;FIND LOC
MOVEM T2,-4(P) ;T4 IS RESTORED FROM HERE
JRST CPOPJ1## ;SKIP RETURN
;SUBROUTINE TO RETURN LOC OF UFB OR SFD AT
;EXIT CPOPJ IF NO UFB OR SFD A.T.
;EXIT CPOPJ1 NORMALLY, WITH T2=T3=LOC, NMPSFU ON IF AN SFD A.T.
UFORSF::HRRZ T2,DEVUFB##(F) ;LOC OF UFB
JUMPE T2,CPOPJ## ;RETURN IS NO UFB
HRRZ T3,DEVSFD##(F) ;LOC OF SFD
JUMPE T3,UFORS1 ;NONE - TALK ABOUT THE UFD
LDB T1,UFYFSN## ;FSN
HLRZ T2,NMBACC##(T3) ;POINT TO 1ST A.T. UNDER THE SFD
PUSHJ P,BYTSCA ;FIND THE RIGHT STR
TROA T2,NMPSFU## ;FOUND - LIGHT SFU
POPJ P, ;NOT THERE, NON-SKIP RETURN
UFORS1: MOVE T3,T2 ;PUT LOC OF UFB OR SFD IN T3
PJRST CPOPJ1## ;AND SKIP-RETURN
;SUBROUTINE TO GET FIRST RETRIEVAL POINTERS FOR A DIRECTORY
;ENTER WITH DEVUFB, DEVSFD SET UP
;EXIT CPOPJ IF NO POINTERS
;EXIT CPOPJ1 NORMALLY, T1=UN1 WORD T2=PT1 WORD
DIRSET::PUSHJ P,UFORSF ;GET LOC OF DIRECTORY CORE BLOCK
POPJ P, ;NONE, NON-SKIP
TRZN T2,NMPSFU## ;IS IT AN SFD?
JRST DIRSE1 ;NO
MOVE T1,ACCUN1##(T2) ;1ST UNIT
MOVE T2,ACCPT1##(T2) ;1ST POINTER
PJRST CPOPJ1## ;GOOD RETURN
DIRSE1: MOVE T1,UFBUN1##(T2) ;1ST UNIT
SKIPN T2,UFBPT1##(T2) ;1ST POINTER
SOS (P) ;OOPS, THE UFD WAS DELETED
PJRST CPOPJ1## ;RETURN
;SUBROUTINE TO SET DDB FOR READING 1ST DATA BLOCK
;FROM THE 1ST PTR SAVED IN CORE
;ENTER T1=UN1 WORD T2=1ST PTR T3=STRUCTURE DB LOC
;EXIT T2=DEVDMP=LOGICAL BLOCK NO OF RIB
; AND DEVRET,DEVRB1,DEVBLK,DEVREL,DEVLFT,DEVRLC,DEVRSU SET
;EXIT CPOPJ IF RIBB ERROR, CPOPJ1 IF OK
SETFS0::HRRZ T3,UNISTR##(U) ;SET T3=LOC OF STR DATA BLOCK
SETFST: PUSHJ P,DDBZR## ;ZERO RETRIVAL POINTERS IN DDB
MOVEI T4,DEVRBN##(F) ;SET DEVRET TO DEVRBN IF MORE POINTERS EXIST
TRNE T1,COP1PT## ;MORE POINTERS?
MOVEI T4,DEVRB1##(F) ;NO, SET DEVRET TO DEVRB1
HRRM T4,DEVRET(F) ;SET DEVRET. IF DEVRET=DEVRBN, MORE POINTERS WILL
;BE READ FROM RIB. IF =DEVRB1, EOF AFTER THIS
; POINTER IS EXHAUSTED
MOVEM T2,DEVRB1##(F) ;SAVE POINTER IN DDB
MOVSI T4,MRIBLN##+1 ;SET DEVRSU (WILL BE RESET WHEN PNTRS READ)
HLLM T4,DEVRSU##(F)
MOVEI T4,1 ;SET CURRENT POINTER LOC AT 1
DPB T4,DEYRLC##
SETZM DEVFLR##(F) ;1ST BLOCK IN DDB PNTRS IS 0
LDB T2,UN1PTR## ;1ST UNIT NUMBER
HLRZ U,STRUNI##(T3) ;POINT U TO 1ST UNIT IN STR
PUSHJ P,NEWUN## ;SET U AND DEVUNI(F) TO CORRECT UNIT
PJRST RIBERR## ;INVALID UNIT!
HRLM U,DEVUNI##(F) ;SAVE UNIT OF RIB
HRRM U,DEVFUN##(F) ;SAVE UNIT OF 1ST POINTER IN DDB
LDB T4,UNYBPC## ;NO OF BLOCKS PER CLUSTER
MOVE T2,DEVRB1##(F) ;1ST POINTER AGAIN
SETZM DEVRIB##(F) ;CLEAR DEVRIB FOR DPB'S
LDB T2,UNYLUN## ;GET CURRENT LOGICAL UNIT NUMBER
DPB T2,DEYRBU## ;STORE IN DEVRIB
MOVE T2,DEVRB1##(F) ;GET FIRST RETRIEVAL POINTER
LDB T1,STYCLP##(T3) ;EXTRACT CLUSTER ADDRESS
DPB T1,DEYRBA## ;STORE IN DEVRIB
LDB T1,STYCNP##(T3) ;GET COUNT FIELD
IMUL T1,T4 ;CONVERT CLUSTERS TO BLOCKS
SUBI T1,1 ;-1 FOR RIB
HRRM T1,DEVLFT##(F) ;NUMBER OF BLOCKS LEFT IN PNTR
LDB T2,STYCLP##(T3) ;CLUSTER ADDRESS
IMUL T2,T4 ;LOC OF RIB
MOVEM T2,DEVBLK##(F) ;SAVE IN DDB
MOVEM T2,DEVDMP##(F) ;SAVE ADR. OF RIB IN DEVDMP
SETZM DEVREL##(F) ;HAVE READ NO BLOCKS OF FILE
TLO S,IOSFIR ;INDICATE HAVE TO CHECK CHKSUM
AOS (P) ;SET FOR SKIP-RETURN
PJRST STOIOS## ;SAVE S AND RETURN
;SUBROUTINE TO READ A DIRECTORY BLOCK
;***********SPECIAL KLUDGE - ENTER WITH DEVNAM(F)=0 TO WRITE***********
;ENTER WITH F=DDB LOC, RIB ADDRESS IN DEVDMP(F)
;EXIT CPOPJ IF EOF, CPOPJ1 IF DATA READ WITH T1=IOWD
;EXIT WITH DEVBLK=NUMBER OF THE BLOCK READ, OR 1 PAST LAST BLOCK IF EOF
DIRRED::PUSHJ P,CHEKU## ;UNIT YANKED?
POPJ P, ;YES, FILE NOT FOUND
HRRZ T1,DEVLFT##(F) ;NUMBER OF BLOCKS LEFT
SOJGE T1,RETRD5 ;POINTER NOT EXHAUSTED IF COUNT .GT. 0
RETRD1: MOVSI T1,1 ;THIS POINTER DONE. PNTRS LEFT?
ADDB T1,DEVRSU##(F)
JUMPGE T1,CPOPJ## ;NO. THROUGH
AOS T1,DEVRET##(F) ;YES. POINTERS IN DDB?
CAIG T1,DEVRBN##(F)
JRST RETRD3 ;YES.
JSP T4,SAVUN## ;PUSH U,SET U=LH(DEVUNI)
MOVE T2,DEVDMP##(F) ;LOC OF RIB
PUSHJ P,UFDRED## ;READ THE RIB
JRST TPOPJ## ;UFD RIB ERR - FILE NOT FOUND
POP P,U ;RESTORE UNIT
PUSHJ P,STORU## ;SAVE IN DDB
TLO S,IOSRIB ;RIB IS NOW IN MONITOR BUFFER
PUSHJ P,SPTRW## ;SET AN AOBJN WORD FOR POINTERS
PUSHJ P,PTRCPY## ;COPY CURRENT POINTERS FROM MON BUF TO DDB
;HERE WITH POINTERS IN DDB
RETRD3: SKIPN T2,@DEVRET##(F) ;GET NEXT POINTER
POPJ P, ;EOF
PUSHJ P,CNVPTR## ;CONVERT TO ADR, COUNT
POPJ P, ;BAD UNIT:CHANGE PNTR
JRST RETRD1 ;CHANGE-UNIT. TRY AGAIN
SOS T1 ;REAL POINTER-COUNT THIS BLOCK
SOS T2,DEVBLK##(F) ;BLOCK TO READ
RETRD5: HRRM T1,DEVLFT##(F) ;SAVE UPDATED COUNT OF BLOCKS LEFT IN POINTER
PUSHJ P,UFORSF ;GET L(UFB OR SFD A.T.)
JRST [MOVEI T3,1 ;IGNORE THIS IF NO UFB YET ESTABLISHED
JRST RETRD6]
TRZE T3,NMPSFU## ;IS IT AN SFD?
SKIPA T3,ACCWRT##(T3) ;YES, USE ACCWRT
LDB T3,UFYWRT## ;HIGHEST WRITTEN BLOCK IN DIRECTORY
AOS T4,DEVREL##(F) ;RELATIVE BLOCK WE ARE GOING TO READ
SUBI T3,-1(T4) ;TRYING TO READ PAST WHAT WAS WRITTEN?
JUMPLE T3,CPOPJ## ;YES IF NEGATIVE - RETURN AN EOF
RETRD6: AOS T2,DEVBLK##(F) ;NO, INCREMENT BLOCK TO READ
PUSHJ P,SAVE1##
MOVE T1,.USMBF ;GET IOWD
TLZ S,IOSRIB ;RIB IS NO LONGER IN MONITOR BUFFER
SKIPN DEVNAM(F) ;DEVNAM=0?
PJRST MONWRT## ;YES, WRITE THE DATA
AOS (P) ;NO, READ. SET FOR SKIP RETURN
;;;TEMPORARY
PJRST MONRED## ;ALWAY READ 1 BLOCK
REPEAT 0,< ;**TEMPORARY UNTIL I FIGURE OUT HOW BEST
; TO INTERFACE MULTI-BLOCK READS IN CACHE
SKIPN P1,.USLBF ;CAN WE USE AN EXTRA PAGE?
PJRST MONRED## ;NO, READ INTO MONITOR BUFFER
HRRZ T4,DEVLFT##(F) ;NUMBER OF BLOCKS LEFT IN POINTER
ADDI T4,1 ;IT HAS ALREADY BEEN SOS'D
CAMLE T4,T3 ;MORE THAN TO END OF CYL?
MOVE T4,T3 ;YES, TAKE AMOUNT TO EOC
CAILE T4,4 ;MORE THAN A PAGE?
MOVEI T4,4 ;YES, TAKE A PAGE
SKIPE CORTAL## ;CORE IN CORE?
CAIG T4,1 ; AND MORE THAN 1 BLOCK OF DATA?
JUMPG P1,MONRED## ;DON'T GET AN EXTRA PAGE IF WE DONT HAVE ONE
;HERE TO READ THE DIRECTORY INTO AN EXTRA PAGE
PUSH P,T4
JUMPL P1,RETRD7 ;GO IF WE ALREADY HAVE AN EXTRA PAGE
MOVEI T2,4*BLKSIZ## ;GET A PAGE
PUSHJ P,GTFWDC## ; OF CACHED SPACE
MOVEI T1,1 ;CANT GET ONE, TOO BAD
SOS P1,T1 ;SAVE LOC OF PAGE
MOVE T2,DEVBLK##(F) ;RESTORE BLOCK NUMBER
RETRD7: POP P,T1 ;RESTORE NO OF BLOCKS TO DO
JUMPE P1,RETRD8 ;GO IF COULDNT GET A FUNNY PAGE
LSH T1,^D18+BLKLSH##;CONVERT TO AN IOWD
MOVNS T1 ;NO OF WORDS
HRRI T1,(P1) ;LOCATION
MOVEM T1,.USLBF ;SAVE IOWD FOR DIRSCN TO SEE
MOVE T3,.USMBF ;SAVE LOC OF MON BUF
MOVEM T3,.USSBF ; IN CASE MONRED DOESN'T RETURN
SKIPA P1,T1 ;SAVE IOWD IN P1
RETRD8: MOVE T1,.USMBF ;READ INTO MON BUF
PUSH P,.USMBF ;SAVE POINTER TO MON BUF
MOVEM T1,.USMBF ;FAKE OUT MAPIO SO IT WILL RELOCATE IOWD
PUSHJ P,MONRED## ;READ DIRECTORY
POP P,.USMBF ;RESTORE PREVIOUS
SETZM .USSBF
JUMPGE P1,CPOPJ## ;GO IF INTO MON BUF
LDB T1,DEYNBB## ;INTO FUNNY PAGE - GET NO OF BLOCKS DONE
SUBI T1,1 ;-1 (AOS'S ALREADY DONE)
ADDM T1,DEVREL##(F) ;UPDATE THE DDB LOCS
ADDM T1,DEVBLK##(F)
MOVNS T1
ADDM T1,DEVLFT##(F)
POPJ P, ;AND TAKE SKIP-RETURN
>;END REPEAT 0
;SUBROUTINE TO CONVERT CFP TO BLOCK NUMBER
;ENTER T1=CFP, EXIT T2=BLOCK NUMBER, U AND DEVUNI SET UP
;EXIT CPOPJ IF THE CFP POINTS TO AN INVALID UNIT
CFP2BK::HRRZ T4,UNISTR##(U) ;LOC OF STR DATA BLOCK
JUMPE T4,CPOPJ## ;EXIT PRESERVING U IF STR WAS YANKED
HRRZ T3,STRSCU##(T4) ;NO. OF SUPER CLUSTERS/UNIT
IDIV T1,T3 ;CONVERT TO UNIT, SUPER CLUSTER NO.
JUMPE T2,CPOPJ## ;BLOCK 0 IS ILLEGAL
EXCH T1,T2 ;UNIT INTO T2
HLRZ U,STRUNI##(T4) ;1ST UNIT IN STR
PUSHJ P,NEWUN## ;SET UP U, DEVUNI(F)
POPJ P, ;INVALID UNIT RETURN
HLRZ T2,STRBSC##(T4) ;NO. OF BLOCKS/SUPER CLUSTER
IMUL T2,T1 ;CONVERT SUPER CLUSTER TO BLOCK ADR
JRST CPOPJ1## ;TAKE GOOD RETURN
;SUBROUTINE TO COMPUTE A CFP
;CFP IS DERIVED FROM THE UNIT IN P3, AND THE POINTER IN ACCPT1
;CFP IS RETURNED IN T1
SETCFP::EXCH U,P3 ;UNIT OF RIB INTO U
LDB T1,UNYLUN## ;LOGICAL UNIT NUMBER OF RIB
EXCH U,P3 ;RESTORE CURRENT U
MOVE T4,UNISTR##(U) ;LOC OF STR DB
HRRZ T2,STRSCU##(T4) ;NO OF SUP. CLUSTERS PER UNIT
IMUL T1,T2 ;SUP CLUS NO FOR BLOCK 0 OF THIS UNIT
PUSHJ P,RIBAD## ;GET ADDRESS OF RIB
HLRZ T4,STRBSC##(T4) ;NO OF BLOCKS PER SUP CLUSTER
IDIV T2,T4 ;SUP CLUS ADR RELATIVE TO BLOCK 0 OF UNIT
SKIPE T3 ;CFP MUST START AT AN EVEN BLOCK
STOPCD .+1,DEBUG,CME, ;++CFP MODULO ERROR
ADD T1,T2 ;COMPLETE SUP CLUS NUMBER
POPJ P, ;RETURN
;SUBROUTINE TO SCAN A DIRECTORY BLOCK
;ENTER WITH NAME IN T1, EXT IN RH(T2)
;EXIT CPOPJ IF NOT FOUND, CPOPJ1 IF FOUND, WITH CFP IN T1,T3=LOC OF DIR ENTRY
DIRSCN: SKIPL T3,.USLBF ;HAVE AN EXTRA PAGE FOR DIRECTORY?
MOVE T3,.USMBF ;IOWD FOR BLOCK
AOS T3 ;POINT TO FIRST DATA WORD
DIRSC1: CAME T1,(T3) ;NAMES MATCH?
JRST DIRSC2 ;NO. TRY NEXT
HLRZ T4,1(T3) ;YES. EXTENSIONS MATCH?
CAIE T4,(T2)
JRST DIRSC2 ;NO. TRY NEXT
HRRZ T1,1(T3) ;YES, GET CFP
JRST CPOPJ1## ;GOOD RETURN
DIRSC2:
IFN FTDUFC,<
SKIPE (T3) ;IF DATA BLOCK NOT EMPTY
TLO T2,200000 ; LIGHT A BIT IN T2
>
ADD T3,[XWD 2,2] ;STEP TO NEXT NAME
IFN FTDUFC,<
TLNE T3,BLKSIZ##-1
JRST DIRSC3
TLZN T2,200000
TLO T2,400000
DIRSC3:>
JUMPL T3,DIRSC1 ;TRY FOR MATCH
IFN FTDUFC,<
JUMPGE T2,CPOPJ## ;IF EMPTY DATA BLOCK
PUSHJ P,UFORSF ;FIND UFB OR SFD AT
POPJ P, ;NONE, TOO BAD
TRZ T2,NMPSFU##
MOVSI T3,UFPZRB## ;SET A BIT SO UFD COMPRESSER
IORM T3,UFBZRB##(T2) ; WILL BE CALLED ON NEXT OUTPUT CLOSE
>
POPJ P, ;THROUGH - NO MATCH
;SUBROUTINE TO DETERMINE WHAT STR TO ENTER A FILE ON.
;CALL WITH P1=SL.PTR.
;RETURNS CPOPJ IF NO ROOM, CPOPJ1 WITH T1=FSN IF A UFB WITH ROOM IS FOUND
;CHANGES P2
UFBSZ: PUSHJ P,SAVE4## ;%
MOVE T1,DEVNAM(F) ;%NAME USER INITED
CAME P1,SYSSRC## ;USE NCR BITS IF ERSATZ DEL
PUSHJ P,ALIASD ;%IS IT AN ALIAS FOR "DSK"?
SKIPA T3,[FS.WLK!FS.NCR] ;%YES,DONT IGNORE NCR BITS
MOVEI T3,FS.WLK ;%NO, IGNORE NCR BITS
PUSHJ P,SLPRF ;%GET JOB OR SYS. SL.PTR.
TLNE F,SYSDEV ;%IF SYS.SL., HONOR WLK AND NCR
MOVEI T3,FS.WLK!FS.NCR;%
PUSH P,T3 ;%GET READY FOR LOOP
PUSH P,P2 ;%
MOVE P4,P1 ;%
;HERE TO GET NEXT CALLER'S FSN.
;P4=CALLERS SL.PTR., (P)=JOB'S SL.PTR., -1(P)=BITS TO CK.
UFBSZ1: MOVE P2,P4 ;%GET NEXT STR NUMBER FROM SL.
PUSHJ P,NXSTR ;%
JRST UFBSZ6 ;%END OF LIST
MOVE P4,P2
MOVE P2,(P) ;%IS IT ON JOB SEARCH LIST?
PUSHJ P,SLFNA ;%
JRST UFBSZ7 ;%NOT ON JOB SL.--DONT SWEAT THE BITS
PUSHJ P,SLGTB ;%YES, GET BITS FROM JOB SL.
TDNE T2,-1(P) ;%IS A BIT ON?
JRST UFBSZ1 ;%YES, CANT USE THIS STR
;%NO, THIS MUST BE THE ONE
UFBSZ7: ;%
HRRZ T2,DEVSFD##(F) ;LOC OF SFD NMB
JUMPE T2,UFBSZ5 ;NONE
HLRZ T2,NMBACC##(T2) ;LOC OF 1ST A.T.
PUSHJ P,BYTSCA ;FIND RIGHT A.T.
SKIPA T3,ACCSTS##(T2) ;FOUND THE A.T.
JRST UFBSZ2 ;NONE THERE, TRY NEXT STR
TRNE T3,ACPDEL##+ACPNIU ;MARKED FOR DELETION?
JRST UFBSZ2 ;YES, A.T. WASN'T REALLY FOUND
UFBSZ5: TLZ M,UUOUFD## ;FOUND THE AT, INDICATE SO
MOVE T3,TABSTR##(T1) ;%YES. LOC OF STR DATA BLOCK
SKIPG STRTAL##(T3) ;%ANY ROOM IN STR?
JRST UFBSZ2 ;%NO. LOOK AT NEXT STR
HLRZ T2,PPBUFB##(P3) ;% LOC OF UFB LIST
PUSHJ P,BYTSCA ;%SEARCH FOR UFB BLOCK FOR THIS STR
SKIPN UFBPT1##(T2) ;%UFD BEEN DELETED FROM THIS STR?
JRST UFBSZ2 ;%YES, CHECK NEXT STR
MOVE T2,UFBTAL##(T2)
SOJLE T2,UFBSZ2 ;%HAVE MORE THAN 1 BLOCK?
MOVE T2,TABSTR##(T1) ;LOC OF THE STR
HLRZ T2,STRUNI##(T2) ;1ST UNIT IN THE STR
MOVE T2,UNIDES##(T2) ;IS THE UNIT (STR) HARDWARE WRITE-LOCKED?
TLNE T2,UNPHWP##
JRST UFBSZ2 ;YES, TRY NEXT STR
JRST UFBSZ9 ;%TAKE GOOD RETURN
UFBSZ2: ;%
;%
JRST UFBSZ1 ;%TRY NEXT ONE
UFBSZ6: MOVEI T1,NRMERR ;NO-ROOM ERROR
TLOE M,UUOUFD## ;UNLESS NO SFD WAS FOUND
MOVEI T1,NCEERR ;NONE FOUND - NO-CREATE ON ENTER ERROR
SOS -2(P) ;%NON-SKIP RETURN
UFBSZ9: POP P,(P) ;%TIDY UP THE STACK
PJRST T2POJ1## ;%1 MORE POP AND SKIP-RETURN
;SUBROUTINE TO FIND THE UFB BLOCK FOR A FILE
;ENTER WITH T1=FSN
;EXIT CPOPJ1 WITH T2=DEVUFB= LOC OF UFB BLOCK, T1=FSN
;NON-SKIP RETURN IF UFB NOT FOUND
SETUFB: HLRZ T2,PPBUFB##(P3) ;%LOC OF 1ST UFB BLOCK
PUSHJ P,BYTSCA ;%SCAN FOR RIGHT UFB
AOSA (P) ;%FOUND
SETZ T2, ;%NOT FOUND, ZERO DEVUFB
HRRM T2,DEVUFB##(F) ;%SAVE LOC OF UFB
POPJ P, ;%AND RETURN
;SUBROUTINE TO CREATE (BUT NOT LINK) ACCESS TABLE
;RETURNS T2=ACC T3=ACC, THE 2 HALVES LINKED
;ASSUMES JOB HAS CB RESOURCE BEFORE ENTRY
;EXIT CPOPJ IF NOT ENOUGH TABLE SPACE, CPOPJ1 NORMALLY
;CREAC IS SAME, BUT PRESERVES T1
CREAC:
CREACC::PUSHJ P,GTCOR ;%GET CORE FOR 1ST PART
JUMPLE T2,GVCBJ
MOVE T3,T2
HRRM P3,ACCPPB##(T3) ;%
PJRST CPOPJ1## ;%AND RETURN
;SUBROUTINE TO CHECK ACCESS PRIVILEGES
;ENTER WITH T1=DESIRED FUNCTION, LH(T1)=-1 IF HAVE MON BUF BUT CAN GIVE IT UP
;EXIT CPOPJ IF PRIVS DON'T ALLOW OPERATION
;EXIT CPOPJ1 IF OK, T1=FUNCTION
CHKPRV::
IFN FTFDAE,<
MOVEI T2,M.XFFA## ;EXCLUDE FULL FILE ACCESS PROGRAMS FROM FILE
JUMPE T2,CHKPV0 ; DAEMON CALLS MONGEN SYMBOL; JUMP IF NOT SET BY MONGEN
PUSHJ P,PRVJB ;SET, A FULL FILE ACCESS PROGRAM OR USER?
CAIA ;NO
JRST CPOPJ1## ;YES, ALLOW ALL PRIVILEGES
>
CHKPV0: PUSHJ P,SAVE2## ;SAVE P1-P2
HLLZ P2,T1 ;SAVE FLAG WHICH SAYS CAN GIVE UP MON BUF
HRRZS T1 ;TYPE OF ACCESS REQUESTED
PUSH P,T1 ;SAVE IT
SETZ P1, ;SIGNAL FIRST CALL TO CHKPR
PUSHJ P,CHKPR ;ACCESS ALLOWED?
CAIA ;NO, NEEDS FUTHER CHECKING
JRST TPOPJ1## ;YES, ACCESS ALLOWED RETURN
IFN FTFDAE,<
PUSHJ P,CHKFD ;IS THE FILE DAEMON RUNNING?
JRST CHKPV6 ;NO, DO DEFAULT THINGS
MOVE T1,(P) ;FUNCTION BEING ATTEMPTED
CAIN T1,FNCCRE## ;CREATE?
TLZ P1,200000 ;CREATING AN SFD IS LIKE CREATING A FILE
HRRI P1,.FDCAD ;SET TO INDICATE DIRECTORY ACCESS FAILURE
TLNE P1,600000 ;READING THE DIRECTORY AS A FILE?
JRST CHKPV2 ;YES, JUST SEND DIRECTORY FILE SPEC TO THE F.D.
TLNE P1,100000 ;WAS THE FAILURE BECAUSE OF DIRECTORY PROTECTION?
JRST CHKPV1 ;YES, SEND FILE SPEC TO THE FILE DAEMON
MOVE T4,DEVACC##(F) ;PROTECTED AGAINST THE ACCESSOR
LDB T1,ACYPRV## ;GET PROTECTION FROM A.T.
TRNN T1,400 ;PROTECTED 4 IN OWNER FIELD?
JRST CHKPV6 ;NO, DO USUAL THINGS
CHKPV1: HRRI P1,.FDCAC ;ASSUME ORDINARY FILE ACCESS
LDB T2,PJOBN## ;JOB NUMBER OF THE ACCESSOR
MOVEI T3,JS.RUU+JS.ASA ;BIT WHICH SAYS RUN UUO IS IN PROGRESS
TDNE T3,JBTSTS##(T2) ;DOING A RUN UUO OR COMMAND?
HRRI P1,.FDCPA ;YES, TELL THE FILE DAEMON THAT INSTEAD
CHKPV2: MOVE T1,DEVACC##(F) ;ADDRESS OF THE ACCESS TABLE
MOVEI T2,ACPCNT## ;READ COUNT BIT
ADDM T2,ACCCNT##(T1) ;BUMP THE READ COUNT SO THE A.T. DOESN'T GO AWAY
PUSHJ P,SAVSTS## ;SAVE STATE OF JOBS RESOURCES
MOVE T1,P1
HRL T1,-1(P) ;TYPE OF ACCESS
MOVSI P1,DEPFCU## ;INDICATE AT COUNT IS HIGH
IORM P1,DEVFCU##(F)
PUSHJ P,SNDFMG ;SEND THE FILE SPEC TO THE FILE DAEMON
JRST CHKPV5 ;NOT RUNNING
ANDCAM P1,DEVFCU##(F) ;NO LONGER HAVE COUNT UP
MOVE P1,T2 ;SAVE THE ANSWER RETURNED BY THE FILE DAEMON
HRRZS T2 ;GET HIGHEST ACCESS ALLOWED
MOVSI T1,DEPFDA## ;ASSUME FILE DAEMON WANTS CONTROL ON CLOSE
TLNE P1,(FD.COC) ;DOES IT?
IORM T1,DEVFDA##(F) ;YES, REMEMBER UNTIL CLOSE TIME
POP P,T3 ;RESTORE SAVED RESOURCES RECORD
PUSHJ P,CKRES ;RESTORE ANY RESOURCE JOB HAD
MOVEI T1,JS.RUU ;RUN UUO OR COMMAND BIT
LDB T3,PJOBN## ;JOB NUMBER OF THE ACCESSOR
TDNN T1,JBTSTS##(T3) ;RUN UUO OR COMMAND IN PROGRESS?
JRST CHKPV3 ;NO
MOVSI T1,(JS.CFX) ;YES, FILE DEAMON WANTS CONTROL ON EXIT BIT
TLNE P1,(FD.COX) ;DOES IT
IORM T1,JBTST2##(T3) ;YES, REMEMBER TO CALL IT AT EXIT TIME
CHKPV3: POP P,T1 ;RESTORE ACCESS REQUESTED
CAIN T1,FNCCRE## ;CREATE?
TLNN P1,(FD.SCP) ;YES, FILE DAEMON SPECIFY PROTECTION?
JRST CHKP3A ;NO
HLRZ P2,P1 ;YES, GET PROTECTION BITS
PUSH P,J ;SAVE J
LDB J,PJOBN## ;JOB NUMBER
PUSHJ P,FNDPDS## ;FIND THE PDB
POP P,J ;RESTORE J
DPB P2,PDYFSP## ;STORE PROTECTION FOR FILUUO
MOVSI P2,(PD.FSP) ;INDICATE FILE DAEMON
IORM P2,.PDDFL##(W) ; SUPPLIED THE PROTECTION
CHKP3A: CAMG T1,T2 ;ACCESS REQUESTED GREATER THAN ACCESS ALLOWED?
JRST CHKPV4 ;NO, ALL IS WELL
MOVSI T4,(JS.FXO) ;MAYBE EXECUTE ONLY?
PUSHJ P,CKXCT ;CHECK THAT
SOSA (P) ;NOT EXECUTE ONLY, DENY ACCESS
IORM T4,JBTST2##(T1) ;EXECUTE ONLY, MARK THAT
CHKPV4: TLNE P1,(FD.CAA) ;DOES THE FILE DAEMON WANT TO BE CALLED ON EACH ACCESS?
MOVEI T2,0 ;YES
DPB T2,DEYFNC## ;STORE HIGHEST ACCESS ALLOWED OR 0
JRST CPOPJ1## ;AND RETURN
CHKPV5: POP P,T3 ;RESTORE RECORD OF RESOURCES
PUSHJ P,CKRES ;RESTORE RECOURCES JOB HAD
ANDCAM P1,DEVFCU##(F) ;NO LONGER HAVE COUNT UP
>;END IFN FTFDAE
CHKPV6: LDB T1,PJOBN## ;ACCESSOR'S JOB NUMBER
PJRST PRVJB0 ;ONLY ALLOW ACCESS IF PRIVILEGED
;SUBROUTINE TO DO ACTUAL PRIVILEGE CHECKING
; RETURNS CPOPJ1 IF NO FURTHER CHECKING IS REQUIRED, CPOPJ IF MORE
; IS NEEDED, P1 NON-ZERO IF THE FILE BEING ACCESSED IS A DIRECTORY
; T1 = DESIRED FUNCTION, T2 = HIGHEST ACCESS ALLOWED
CHKPR: LDB T2,DEYFNC## ;GET MOST POWERFUL OPERATION ALLOWED
CAIE T1,FNCCPR## ;IF NOT TRYING TO CHANGE PROTECTION
JUMPN T2,CHKPR5 ;CHECK IT IF STORED
LDB T2,PJOBN## ;GET JOB NUMBER
SKIPN T3,DEVUPP##(F) ;USE "IN YOUR BEHALF" PPN IF SPECIFIED
MOVE T3,JBTPPN##(T2) ;GET PRJ,PRG WORD
HRRZ T2,DEVACC##(F) ;LOC OF A.T.
HRRZ T2,ACCPPB##(T2) ;LOC OF PPB
HLRZ T4,DEVEXT(F) ;EXTENSION
CAIE T4,(SIXBIT .UFD.);UFD?
JRST CHKPR1 ;NO
MOVE T2,DEVFIL(F) ;YES, COMPARE PRJ-PRG WITH UFD NAME
TLO P1,400000 ;SET P1 NEGATIVE
TLOA M,UUODIR## ;AND LIGHT A BIT
CHKPR1: MOVE T2,PPBNAM##(T2) ;MASK FILE'S PRJ,PRG AGAINST USER'S
CAIN T4,(SIXBIT .SFD.);IS FILE AN SFD?
TLO P1,200000 ;YES, SET P1 .GT. 0
PUSHJ P,GETAC ;T3=BYTE POINTER TO ACCESS CODE IN RH T2
PUSHJ P,UORSS ;NEEDS MORE CHECKING, LOC OF UFB
JRST CPOPJ1## ;OK RETURN, OWNER CHANGING PROTECTION
IFN FTFDAE,<
TLO P1,100000 ;IF PROTECTION FAILURE ITS BECAUSE OF DIRECTORY
; PROTECTION
>
TRZE T4,NMPSFU## ;FILE IN AN SFD?
JRST [LDB T2,ACYPRV## ;YES, GET PRIVS FROM A.T.
JRST .+2]
LDB T2,UFYPRV## ;GET UFD PRIVS FOR OWNER+PROJ+UNIV
LDB T2,T3 ;GET PRIV BYTE FOR OWNER OR PROJ OR UNIV
JUMPGE P1,CHKPR2 ;GO IF NOT A UFD
CAILE T1,FNCRED## ;UFD, HIGHEST FUNC ALLOWED IS READ
PJRST PRVJB ;ERROR IF NOT PRIVILIGED
JRST CHKPR3 ;GO CHECK ACTUAL UFD PROTECTION
CHKPR2: CAIE T1,FNCCRE## ;CREATE?
JRST CHKPR3 ;NO
TRNN T2,UFRXCR## ;YES. CREATE IN UFD ALLOWED?
POPJ P, ;ERROR IF NOT PRIVILIGED
PJRST CPOPJ1## ;YES, OK
CHKPR3: TRNN T2,UFRXLK## ;DATA FILE - LOOKUP ALLOWED?
JRST PRERCK ;ONLY IF PRGRAM NAME = FILE NAME
IFN FTFDAE,<
TLZ P1,100000 ;FAILURE AFTER THIS IS BECAUSE OF FILE PROTECTION
>
HRRZ T4,DEVACC##(F) ;LOC OF A.T.
LDB T2,ACYPRV## ;ACCESS PRIVS(T4) FOR OWNER+PROJ+UNIV
PUSHJ P,GTPRV ;GET PRIVS FOR OWNER, PROJ, OR UNIVERSE
; (CONVERTED FROM PROTECTION TO PRIVS)
JUMPE P1,CHKPR4 ;GO IF NOT A UFD
TRNE T2,UFRXRD## ;YES. CAN THIS USER READ THIS UFD?
;(TRC OF PROT WAS DONE IN GTPRV)
POPJ P, ;USER CANT READ UFD - ERROR IF NOT PRIVILIGED
SKIPL P1 ;SFD?
TRCA T2,7 ;YES, RECOMPLEMENT PROTECTION
MOVEI T2,FNCRED## ;YES, SET HIGHEST FUNCTION ALLOWED=READ
CHKPR4: CAIG T2,FNCRED## ;CONVERT PRIVS BYTE TO MOST POWERFUL FUNCTION
JRST PRSTOR ;BYTE=FNC IF LESS THAN FNCRED
LSH T2,1 ;2*BYTE-1 OR 2*BYTE OTHERWISE
CAIGE T2,FNCCPR##+1
CAIG T2,FNCTRN##+1
SOS T2
PRSTOR: DPB T2,DEYFNC## ;SAVE MOST POWERFUL FUNCTION ALLOWED
CHKPR5: LDB T3,PJOBN## ;YES. GET JOB NUMBER
CAMG T1,T2 ;TRYING A MORE POWERFUL FUNCTION?
JRST CPOPJ1## ;NO. LEGAL
;CKXCT PRESERVES T4
CKXCT:
CHKXCT: EXCH T1,T3 ;JOB NUMBER IN T1, PROTECTION IN T3
; PJRST XOCHK ;FOR CALL TO XOCHK
;SUBROUTINE TO SEE IF THE MONITOR IS READING AN
; EXECUTE ONLY FILE AND MAKE THE PROGRAM XO IF SO
;CALLING SEQUENCE:
; MOVE T1,JOB NUMBER
; MOVE T2,HIGHEST ACCESS ALLOWED
; MOVE T3,TYPE OF ACCESS BEING ATTEMPTED
; PUSHJ P,XOCHK
;RETURNS CPOPJ1 IF XO PROGRAM, CPOPJ IF NOT
;PRESERVES T2,T4
XOCHK: CAIN T2,FNCEXC## ;FILE EXECUTE ONLY?
CAILE T3,FNCRED## ;YES, TRYING TO READ?
POPJ P, ;ERROR IF NOT PRIVILIGED
MOVEI T3,JS.RUU+JS.ASA
TDNN T3,JBTSTS##(T1) ;YES, RUN COMMAND OR UUO?
POPJ P, ;ERROR IF NOT PRIVILIGED
MOVEI T3,JS.XOR ;YES, INDICATE JOB IS XCT ONLY
IORM T3,JBTSTS##(T1)
PJRST CPOPJ1## ;AND TAKE GOOD RETURN
;HERE IF PRIVS DO NOT ALLOW FUNCTION (NORMALLY)
;ALLOW THIS FUNCTION IF A PROPRIETARY JOB (JOB NAME=FILE NAME)
PRERCK:
REPEAT 0,< ;THIS CODE NEEDS MORE CHECKING THAN EXISTS HERE
LDB T2,PJOBN## ;JOB NUMBER
MOVE T2,JBTNAM##(T2) ;PROGRAM NAME
CAMN T2,DEVFIL(F) ;SAME AS FILE NAME?
AOS (P) ;YES. LEGAL
>
POPJ P, ;ERROR IF NOT PRIVILIGED
IFN FTFDAE,<
;PRESERVES T2
CKRES: PUSHJ P,RESTS## ;RESTORE RESOURCES
MOVNI T1,ACPCNT## ;REDUCE READ COUNT
MOVE T3,DEVACC##(F)
ADDM T1,ACCCNT##(T3)
POPJ P,
>
IFN FTFDAE,<
;SUBROUTINE TO SEND A FILE SPECIFICATION TO THE FILE DAEMON
; CALLING SEQUENCE:
; MOVE T1,CODE
; MOVE F,ADDRESS OF THE DDB
; PUSHJ P,SNDFMG
;RETURNS CPOPJ ON ERROR, CPOPJ1 IF SUCCESSFUL
SNDFMG::PUSH P,T1 ;SAVE CODE
MOVEI T2,1+4+MAXLVL## ;SPACE FOR CODE, STR, NAME, EXT, PPN, & SFDS
PUSHJ P,GTFWDC## ;GET FROM FUNNY SPACE
JRST TPOPJ## ;COULDN'T
POP P,(T1) ;CODE
PUSHJ P,SAVE1## ;SAVE P1
MOVE P1,T1 ;COPY PACKET ADDRESS
HRRZ T1,DEVACC##(F) ;IF NO A.T.
JUMPE T1,SNDFM5 ; LOSE
PUSHJ P,GETNMB##
MOVSI T3,1(P1) ;CLEAR THE PACKET
HRRI T3,2(P1)
SETZM 1(P1)
BLT T3,1+4+MAXLVL##-1(P1)
LDB T3,ACYFSN## ;GET FSN
JUMPE T3,[MOVE T2,DEVUFB##(F)
LDB T3,UFYFSN##
HRRZ T2,DEVACC##(F)
JRST .+1]
MOVE T3,TABSTR##(T3) ;STR DB ADDR
MOVE T3,STRNAM##(T3)
MOVEM T3,1(P1) ;STR
SKIPGE DEVRAD##(F)
SKIPA T4,DEVFIL(F)
MOVE T4,NMBNAM##(T1)
MOVEM T4,2(P1) ;NAME
SKIPGE DEVRAD##(F)
SKIPA T4,DEVEXT(F)
HRLZ T4,NMBEXT##(T1)
HLLZM T4,3(P1) ;EXT
MOVE T4,ACCPPB##(T2)
MOVE T4,PPBNAM##(T4)
MOVEM T4,4(P1) ;PPN
PUSH P,[0] ;MARK START OF SFD LIST
MOVE T4,DEVSFD##(F)
TRNN T4,-1
JUMPN T4,SNDFM3
TRNE T4,-1
SKIPL DEVRAD##(F)
JRST SNDFM1
HRRZ T1,T4
JRST SNDFM2
;STILL IN FTFDAE CONDITIONAL
SNDFM1: HLRZ T1,NMBPPB##(T1) ;GET NEXT SFD NMB
TRZN T1,NMPUPT## ;SEE IF NMB
JUMPN T1,SNDFM1 ;IF NOT, LOOP FOR MORE
JUMPE T1,SNDFM3 ;JUMP IF AT END
SNDFM2: PUSH P,NMBNAM##(T1) ;SAVE SFD NAME
JRST SNDFM1 ;LOOP
SNDFM3: MOVEI T2,5(P1) ;ADDRESS OF START OF SFD LIST IN PACKET
SNDFM4: POP P,T1 ;GET SFD NAME OR ZERO
CAIGE T2,1+4+MAXLVL##(P1) ;STORED THE MAXIMUM?
MOVEM T1,(T2) ;NO, STORE SFD
AOS T2 ;BUMP ADDRESS OF SFD LIST
JUMPN T1,SNDFM4 ;GO IF MORE
PUSH P,J ;SAVE J
MOVE J,.CPJOB## ;MAKE SURE IT'S SET UP
PUSHJ P,FNDPDS## ;GET THE PDB POINTER FOR SEQUENCE # IN SENDFD
SKIPN T4,DEVUPP##(F)
MOVE T4,JBTPPN##(J)
POP P,J ;RESTORE J
MOVE T1,P1 ;GET PACKET ADDRESS IN T1
PUSHJ P,SENDFD ;SEND THE MESSAGE TO THE FILE DAEMON
POPJ P, ;ERROR, NON-SKIP RETURN
JRST CPOPJ1## ;GOOD RETURN
SNDFM5: MOVE T2,P1 ;PACKET ADDRESS
MOVEI T1,1+4+MAXLVL## ;SPACE FOR CODE, STR, NAME, EXT, & SFDS
PJRST GVFWDS## ;RETURN THE SPACE AND NON-SKIP RETURN
>;END IFN FTFDAE
IFN FTFDAE,<
;SUBROUTINE TO CALL THE FILE DAEMON TO DETERMINE WHETHER THE
; ACCESS THAT THE CURRENT JOB WANTS TO A FILE IS ALLOWED
;CALLING SEQUENCE:
; SETUP FILMSG TO BE THE FULL PATH TO THE FILE IN QUESTION
; MOVE T1,ADDRESS OF MESSAGE
; MOVE T4,SENDER'S PPN
; MOVE W,PDB TO REMEMBER SEQUENCE # (SENDER) IN
; PUSHJ P,SENDFD
;RETURNS CPOPJ IF THE MESSAGE COULDN'T BE SENT
;RETURNS CPOPJ1 WITH THE HIGHEST FUNCTION ALLOWED IN T2
;PRESERVES J
SENDFD::PUSHJ P,CHKFD ;FILE DAEMON RUNNING?
JRST SENDFX ;NO, ERROR RETURN, BUT GIVE BACK CORE
PUSH P,J ;SAVE J
HRRZ T2,%CNIPS## ;USE THE SYSTEM IPCF MESSAGE COUNTER
HRRM T2,3(T1) ;STORE IT INTO THE "EXT" WORD OF THE MSG
HRLM T2,.PDQSN##(W) ; ...AND STORE IT TO CHECK LATER
MOVSI T2,1+4+MAXLVL## ;LENGTH OF PACKET
HRR T2,T1 ;COPY ADDRESS
MOVE T1,[40,,%SIFDA##] ;SYSTEM SENDER'S CODE,,RECEIVER'S PID
MOVE T3,PIDTAB##+1 ;PID OF SYSTEM GOPHER
ADDI T3,1
PUSHJ P,SENDSP## ;SEND THE MESSAGE TO THE FILE DAEMON
JRST JPOPJ## ;ERROR
HLRZ T2,.PDEPA##(W) ;ADDRESS OF THE PACKET RETURNED
PUSH P,.IPCFD##+1(T2);GET THE ANSWER
LDB T1,PKLNT2## ;LENGTH OF THE PACKET DATA
ADDI T1,.IPCFD## ;PLUS OVERHEAD
PUSHJ P,GIVWDS## ;RETURN THE PACKET TO FREE CORE
POP P,T2 ;RESTORE THE ANSWER
JRST JPOPJ1## ;RESTORE J AND GIVE GOOD RETURN
SENDFX: MOVE T2,T1 ;PACKET ADDRESS
MOVEI T1,1+4+MAXLVL## ;SPACE FOR CODE, STR, NAME, EXT, & SFDS
PJRST GVFWDS## ;RETURN THE SPACE AND NON-SKIP RETURN
;STILL IN FTFDAE CONDITIONAL
;SUBROUTINE TO CHECK IF TRYING TO CALL THE FILE DAEMON
; IN BEHALF OF THE FILE DAEMON AND TO VERIFY THAT THE FILE DAEMON IS
; RUNNING. RETURNS CPOPJ IF TRYING TO CALL THE FILE DAEMON IN ITS BEHALF
; OR IF THE FILE DAEMON ISN'T RUNNING. CPOPJ1 OTHERWISE
;PRESERVES T1,T2, AND T4
CHKFD:: PUSH P,T1 ;SAVE CALLERS
SKIPE T1,FDAJOB## ;FILE DAEMON RUNNING
CAMN T1,.CPJOB## ;YES, IS THIS HIM
PJRST TPOPJ## ;DON'T CALL THE FILE DAEMON
PUSH P,T2 ;SAVE CALLERS
MOVE T2,[SIXBIT/FILDAE/] ;JOB FILDAE?
CAMN T2,JBTNAM##(T1) ;
SKIPL JBTSTS##(T1) ;YES, RUNNING?
PJRST TTPOPJ ;NO
PJRST TTPPJ1 ;GO
>
;SUBROUTINE TO DETERMINE IF A JOB IS PRIVILEGED
;ENTER AT PRVJB FOR JOB # IN DDB, ENTER PRVJO FOR JOB # IN AC J(= J)
;RETURNS CPOPJ IF NOT, CPOPJ1 IF PRIVILEGED (PRJ,PRG=1,2 OR JACCT ON)
;RESPECTS T1-T3
PRVJO:: PUSH P,T1 ;SAVE T1
MOVE T1,J ;JOB NUMBDR
JRST PRVJB1
PRVJB:: PUSH P,T1 ;SAVE T1
LDB T1,PJOBN## ;JOB NUMBER
PRVJB0: MOVSI T4,DEPFFA ;DID THIS GUY ASK FOR
TDNE T4,DEVJOB(F) ;PRIVS IN FILOP. UUO
JRST TPOPJ## ;NO--DO NOT LOOK
SKIPE T4,DEVUPP##(F) ;USE "IN YOUR BEHALF" PPN IF SPECIFIED
TDZA T1,T1 ;DONT TEST JACCT IF IN YOUR BEHALF
PRVJB1: MOVE T4,JBTPPN##(T1) ;PRJ,PRG OF JOB
CAMN T4,FFAPPN## ;IS IT FULL-FILE-ACCESS PPN?
JRST TPOPJ1## ;YES. ALWAYS LEGAL
MOVE T4,JBTSTS##(T1) ;STATUS WORD
TLNE T4,JACCT ;JACCT=1?
PJRST TPOPJ1## ;YES. OK RETURN
PJRST TPOPJ## ;NO, ERROR RETURN
;SUBROUTINE TO CHECK ACCESS PRIVS FOR THE UUO
;CALL: MOVEI AC,LOC
; CALLI AC,ACCCHK,
;LOC: XWD ACTION,PROTECTION
;LOC+1: XWD OWNER PRJ-PRG
;LOC+2: XWD REQUESTOR PRJ-PRG
;RETURN CPOPJ1, AC=0 IF OK; AC=-1 IF ACCESS NOT ALLOWED
ACCCHK::PUSHJ P,SAVE2## ;SAVE P1-P2
AOS (P)
HRR M,T1 ;LOC OF ARGUMENTS
PUSHJ P,GETWDU## ;GET ACTION,PROT
MOVE P1,T1 ;SAVE IN P1
PUSHJ P,GETWD1## ;GET OWNER PPN
MOVE P2,T1 ;SAVE
PUSHJ P,GETWD1## ;GET REQUESTOR PPN
CAMN T1,FFAPPN## ;REQUESTOR=GOD?
JRST RTZER## ;YES, OK
MOVE T2,P2 ;NO, OWNER JBTPPN
MOVE T3,T1 ;REQUESTOR JBTPPN
HLRZ T1,P1 ;ACTION
IFN FTFDAE,<
PUSHJ P,PRVJO ;PRIVILEGED JOB?
CAIA ;NO
SKIPN [M.XFFA##] ;YES, SKIP IF PRIVILEGED JOBS DON'T CALL THE FILE DAEMON
PUSHJ P,CHKFD ;SEE IF FILE DAEMON IS RUNNING
JRST ACCCH0 ;FILE DAEMON ISN'T RUNNING
CAIGE T1,7 ;IF A UFD,
TRNE P1,400 ; OR A FILE FOR WHICH THE FILE DAEMON WILL BE CALLED,
JRST RTZER## ; SAY ITS OK SINCE THE FILE DAEMON WILL CHECK ACCESS
ACCCH0:>
HRRZ T4,P1 ;PROTECTION
CAIL T1,7 ;DATA OPERATION?
JRST ACCCH1 ;NO - UFD
TRCN T1,7 ;REVERSE USER'S FUNCTION TO AGREE WITH FILSER'S
MOVEI T1,FNCCPR## ;0=CHANGE PROT - SET TO EXACTLY THAT FUNCTION
PUSHJ P,GETAC0
CAIA
JRST RTZER##
CAIN T1,FNCCPR## ;CHANGE PROTECTION?
MOVEI T1,7 ;YES, CHANGE IT BACK TO 7
CAMLE T1,T2
JRST RTM1##
JRST RTZER##
;HERE IF FILE IS A UFD
;FOR A UFD, PROT IS IN BITS 18-26
ACCCH1: PUSHJ P,GETAC0 ;GET RIGHT BYTE POINTER
JFCL
HRRZ T2,P1 ;GET PROTECTION
LSH T2,-11
TRO T2,UFRXRD##*100 ;OWNER MAY ALWAYS READ
LDB T2,T3 ;GET RIGHT BYTE
MOVEI T3,UFRXCR## ;SET T2 FOR RIGHT TEST
CAIE T1,7 ;TESTING IF CREATE IS LEGAL?
MOVEI T3,UFRXRD## ;NO - TEST IF READING UFD LEGAL
TDNE T2,T3 ;IS IT OK?
JRST RTZER## ;YES, T1=0
JRST RTM1## ;NO, T1=-1
;SUBROUTINE TO CHECK ACCESS CODE FOR FILE OR HIGH SEGMENT
;CALLED FROM SEGCON FOR ACCESS TO SHARABLE HIGH SEGMENTS
;CALL: MOVE J,JOB NO.
; MOVEI T1,PROTECTION CODE (PR.EXC = 6, PR.WRT = 2)
; MOVE T2, FILE PROJ,PROG
; MOVE T3,PROJ-PROG OF READER
; MOVE T4,9 BIT PROTECTION FOR FILE
; PUSHJ P,CHKACC
; CANNOT PERFORM FUNCTION
; OK TO PERFORM FUNCTION
;ENTER AT CHKAC0 IF PRIVILEGED JOBS DONT AUTOMATICALLY WIN
CHKACC::PUSH P,T4 ;SAVE PROTECTION
PUSHJ P,PRVJO ;PRIVILEGED (J ALREADY SET UP TO JOB #) JOB?
TRCA T1,7 ;NO, TEST MORE. CONVERT PROT TO PRIV
PJRST TPOPJ1## ;YES, TAKE GOOD RETURN
POP P,T4 ;RESTORE PROTECTION
CHKAC0: PUSHJ P,GETAC0 ;T2=HIGHEST ACCESS ALLOWED
CAMG T1,T2 ;COMPARE DESIRED PRIVILEGE WITH HIGHEST ALLOWED
PJRST CPOPJ1## ;OK, DESIRED IS LESS THAN OR EQ OR OWNER CHG PRV
MOVE T3,.CPJOB## ;LEGAL IF READING AN XC ONLY FILE
PJRST CHKXCT
;SUBROUTINE TO GET HIGHEST ACCESS FOR OWNER,PROJ,UNIVERSE ALLOWED
;SET UP BYTE POINTER FOR WHICH EVER OF THREE FIELDS
;CALL: MOVE T1,FUNCTION FNCXXX
; MOVE T2, FILE PROJ,PROG
; MOVE T3,PROJ-PROG OF REQUESTOR
; MOVE T4, 9 BIT ACCESS FOR FILE(NEEDED ONLY ON CALL FROM CHKACC)
; PUSHJ P,GETAC
; T3=BYTE POINTER TO PROPER FIELD IN AC T2, T1=FUNCTION FNCXXX
; OK RETURN-OWNER CHANGING PROTECTION(ALWAYS LEGAL)
GETAC: JUMPE F,GETAC0 ;NO STR IF NO DDB
PUSHJ P,SAVE1## ;SAVE P1
HRRZ P1,DEVUNI##(F) ;ADDRESS OF THE UNIT DATA BLOCK
JUMPE P1,GETAC0 ;NO STR IF NO UNIT
HRRZ P1,UNISTR##(P1) ;ADDRESS OF THE STR DATA BLOCK
MOVE P1,STRPPN##(P1) ;PPN OF THE OWNER OF THE STR
TLC P1,-1 ;WILD CARD PROJECT NUMBER?
TLCN P1,-1
HLL P1,T3 ;YES, THIS PROJECT MATCHES
TRC P1,-1 ;WILD CARD PROGRAMMER NUMBER?
TRCN P1,-1
HRR P1,T3 ;YES, THIS PROGRAMMER NUMBER MATCHS THAT
CAMN P1,T3 ;IS REQUESTOR THE OWNER OF THE STR?
JRST GETAC3 ;YES, ALLOW HIM OWNER ACCESS TO IT
GETAC0: XOR T3,T2 ;COMPARISON OF TWO PPN'S
TDNE T3,[XWD INDPPN##,-1] ;APPEAR TO BE OWNER?
;IF INDPPN=0 (USUAL) ONLY PROG FIELD
;IF INDPPN=777777 THEN BOTH MUST MATCH PROJECT
;AND PROGRAMMER MUST MATCH. INDPPN
;MAYBE CHANGED FROM 0 WITH MONGEN
JRST GETAC1 ;NOT OWNER.
TLNN T3,-1 ;DOES PROJECT MATCH TOO?
JRST GETAC3 ;YES. HE IS OWNER.
TLNN T2,777770 ;NO. IS OWNER ONLY IF DATA IS NOT
;IN A PROJECT UNDER TEN.
JRST GETAC1 ;NOT OWNER. E.G., 100, 4 READING 1,4.
;HERE IF REQUESTOR IS OWNER
GETAC3: MOVE T3,[POINT 3,T2,29] ;POINT TO OWNER PRV BYTE
CAILE T1,FNCRED## ;YES, IS OWNER LOOKING UP OR READING?
CAIN T1,FNCCPR## ;NO, IS OWNER CHANGING PROTECTION?
JRST CPOPJ1## ;YES, GIVE OK RETURN
JRST GETAC2 ;NO, GIVE NEED MORE CHECKING RETURN
GETAC1: MOVE T2,T3
MOVE T3,[POINT 3,T2,29] ;POINT TO OWNER PRIVS
TLNE T2,-1 ;SAME PROJECT?
IBP T3 ;NO, MOVE TO PROJ FIELD, THEN TO UNIVERSE FIELD
IBP T3 ;YES, MOVE TO PROJ FIELD
GETAC2: MOVE T2,T4 ;SETUP 9 BIT ACCESS (IN CASE THIS IS CHKACC CALL)
; PJRST GTPRV ;FALL INTO GTPRV
;SUBROUTINE TO GET OWNER, PROJ, OR UNIVERSE PROT. CODE, AND CONVERT TO PRIVILEGE CODE
;T3=PROPER BYTE TO T4, T4=9 BIT PROT CODE
;PRIV RETURNED IN T2, T1 RESPECTED
GTPRV: LDB T2,T3 ;RETURN PROPER 3 BIT ACCESS CODE
IFN FTFDAE,<
CAMN T3,[POINT 3,T2,29]
CAIG T2,2 ;OWNER, 3 OR GREATER MUST BE REMAPPED
JRST GTPRV1 ;NOT THE OWNER
TRZ T2,4 ;CLEAR THE CALL FILE DAEMON BIT
LSH T2,1 ;4 MAPS TO 0, 5 MAPS TO 2
TRNE T2,4 ;6 MAPS TO 5, 7 MAPS TO 7
TRO T2,1
>
GTPRV1: TRC T2,7 ;CONVERT PROT TO PRIVS
POPJ P,
;SUBROUTINE TO DETERMINE IF SOFTWARE WRITE-LOCK IS ON FOR THIS JOB OR ALL JOBS
;IF EITHER, IOSWLK IS SET IN S
;ENTER WITH A.T. LOC IN DEVACC
STWLK: PUSHJ P,SAVE2## ;SAVE SOME ACS
HRRZ T2,DEVACC##(F) ;LOC OF A.T.
LDB T1,ACYFSN## ;FILE-STRUCTURE NUMBER
PUSHJ P,SLPRF ;GET JOB OR SYS SL
JUMPE T1,STWLK0 ;DONT LOOK AT JOB SL. IF NOT YET SET UP
PUSHJ P,SLFNA ;FIND FSN IN IT
JRST STWLK0 ;NOT IN SL. SO BIT NOT ON
PUSHJ P,SLGTB ;GET BITS
TRNE T2,FS.WLK ;SOFTWARE WRITE LOCK?
JRST STWLK1 ;YES
STWLK0: MOVE T2,UNIAWL##(U) ;NOT LOCKED - IS WHOLE UNIT LOCKED?
MOVE T1,UNIDES##(U) ;OR IS UNIT HARDWARE-WRITE-LOCKED?
TLNN T2,UNPAWL##
TLNE T1,UNPHWP##
STWLK1: TLO S,IOSWLK ;YES
POPJ P, ;AND RETURN
;SUBROUTINE TO ADJUST PPB AND NMB USE-COUNTS
;T1 RESPECTED
FNDLS: PUSHJ P,GETCB ;GET CB RESOURCE
FNDLC: PUSHJ P,DORZER ;%MAKE SFD ACC DORMANT
SOS PPBCNT##(P3) ;%1 LESS PPB USER
SOSA NMBCNT##(P4) ;%1 LESS NMB USER
;HERE ON GOOD RETURN FROM FNDFIL
FNDXIT: AOS (P) ;%SET FOR SKIP-RETURN
SETZM DEVRB1##(F) ;%MAKE SURE NO POINTERS IN DDB
PJRST GVCBJ ;%GIVE UP CB AND RETURN
;A LOOKUP OF AN SFD IS DONE IN TWO PASSES:
;THE FIRST PASS MERELY LOADS ALL THE ACC'S INTO CORE AND
;SETS THEM NON-DORMANT. IT'S THE SECOND PASS THAT ACTUALLY
;DOES THE LOOKUP. IF, FOR SOME REASON, THE SECOND PASS
;SHOULD FAIL, WE MUST GO BACK AND MAKE THE ACC'S DORMANT
;AGAIN. ELSE THE CORE GRABBER WILL NEVER RECYCLE THEM.
;ENTER WITH CB AND P4=NMB
;PRESERVES ALL AC'S
DORZER: PUSH P,T1 ;%QUIT UNLESS SFD
HLRZ T1,NMBRNG##(P4)
JUMPE T1,TPOPJ##
PUSH P,T2
PUSH P,F ;%FLAG THAT WE HAVE CB
SETZ F,
MOVEI T1,DIFNAL##(P4) ;%PRESET PRED
DORZR1: HLRZ T1,ACCNMB##(T1) ;%STEP TO NEXT ACC
JUMPE T1,DORZR2
TRNE T1,DIFNAL## ;%BACK TO NMB?
JRST DORZR2 ;%YES
MOVE T2,ACCCNT##(T1) ;%ZERO COUNT?
ANDI T2,ACMCNT+ACPCRE;%AND NOT CREATE?
IOR T2,ACCDOR##(T1) ;%AND NON-DORMANT?
SKIPN T2
PUSHJ P,ATSDRA ;%YES, MAKE DORMANT
JRST DORZR1 ;%LOOP ONCE FOR EACH ACC
DORZR2: POP P,F ;%RESTORE F
JRST TTPOPJ## ;%RESTORE T2 AND T1
FILNRM:
FNDR1B: PUSHJ P,GVCBJ ;%
FNDER1: SCHEDULE
PUSHJ P,ERMNBF
MOVEI T1,NETERR ;NO FREE CORE
POPJ P,
FNER1B: SOS PPBCNT##(P3)
FNER1A: MOVEI T1,NETERR
PJRST GVCBJ ;%
ERMNB0: PUSHJ P,GVCBJ
ERMNBF: PJRST FNDLS
FNER2Z:IFN FTFDAE,<
PUSHJ P,TSTAMD ;%RETURN BLOCKS IF A.T. MARKED FOR DELETION
JRST FNER47 ;GO GET CB BACK
>
HRRZ T2,DEVACC##(F)
IFN FTFDAE,<
;WE NEVER GET HERE WITH THE COUNT UP FOR US.
;SO IF THE COUNT IS UP, THERE MUST BE SOMEBODY ELSE USING THE FILE.
LDB T1,ACZCNT##
JUMPN T1,FNER2X
>
PUSHJ P,ATRMVX
FNER47: PUSHJ P,GETCB
FNER2X:IFN FTFDAE,<
PUSHJ P,TSTAMD ;%RETURN BLOCKS IF A.T. MARKED FOR DELETION
PUSHJ P,GETCB ;GET CB BACK
>
HLLZS DEVACC##(F)
PUSHJ P,ERMNB0
PUSHJ P,TSTPPB##
FNER2W: MOVEI T1,PRTERR ;SUPERSEDE ILLEGAL
POPJ P,
FNDER3: PUSHJ P,ERMNBF
FNER3A: MOVEI T1,FNFERR ;FILE NOT FOUND
POPJ P,
FNER21: PUSHJ P,FNER2Z
MOVEI T1,FBMERR
POPJ P,
FNDER5: PUSHJ P,GVCBJ
FNDER6: PUSHJ P,ERMNBF
MOVEI T1,AEFERR ;RENAME TO AN EXISTING NAME
POPJ P,
FNDER7: HLLZS DEVACC##(F) ;NOT OURS
MOVEI T1,FBMERR ;TRYING TO ENTER, A FILE IS BEING CREATED
JRST FNDLC
FNDER8: PUSHJ P,FNDER3
MOVE P2,P1 ;SEARCH LIST EMPTY?
PUSHJ P,SLGTA
SKIPA T1,[SLEERR] ;YES
MOVEI T1,IPPERR ;NO, ILLEGAL PPN ERROR
POPJ P,
FNDR10: MOVEI T1,CSDERR ;SUPERSEDE ILLEGAL
PJRST FNDLC
FNER9A: PUSH P,T1 ;SAVE ERROR CODE
PUSHJ P,FNDLC ;RETURN DUMMY A.T.
HRRZ T1,DEVACC##(F) ;REMOVE OUR A.T.
PUSHJ P,ATRMOV
MOVE T1,(P) ;GET ERROR CODE
MOVE J,.CPJOB##
MOVE T4,JBTSTS##(J) ;JOB STATUS
TRNE T4,JS.SFL ;IF HE HAS DSKFUL PAUSE
CAIE T1,NRMERR ;AND THE DISK IS FULL
PJRST TPOPJ##
MOVEI T4,.ERFUL ;SEE IF HE'S INTERCEPTING
PUSHJ P,SETINJ##
SKIPA ;NO
PJRST TPOPJ## ;YES, LET IT HAPPEN
PUSHJ P,DSKFUL## ;STOP THE JOB FOR HIM
POP P,(P) ;HE SAID CONTINUE,
MOVE T2,P1 ;MAKE THINGS RIGHT AGAIN
PJRST FNDFLZ ;AND GO TRY TO FIND SOME ROOM
FNER20: SKIPA T1,[SIUERR] ;%RENAME SFD WHICH IS IN USE
FNER11: MOVEI T1,FBMERR ;%ENTER, RENAME IN PROGRESS
PJRST FNDLC ;%
FNER12: MOVEI T1,PRTERR
JRST FNER19
FNER13: SKIPA T1,FNER17
FNER18: MOVEI T1,NRMERR
FNER19: PUSHJ P,GVCBJ
HRRM P1,ACCPPB##(P2) ;RESTORE ACCPPB (IN CASE CHANGING DIRECTORIES)
MOVE P1,T1
PUSHJ P,TSTPPB##
HRRZ T1,P1
PJRST FNDLS ;%
FNER14: MOVEI T1,FBMERR ;%RENAME, FILE MARKED FOR DELETION
PJRST FNDLC ;%
FNER17: MOVEI T1,IPPERR ;% NO UFD
PJRST FNDLC
FNR16A: PUSHJ P,GVCBJ
FNER16: PUSHJ P,ERMNBF
HLLZS NMBCFP##(P4) ;CLEAR CFP, SO NEW ENTER WILL WIN IF UFD
; WAS FIXED UP BY SUPER USETO-TYPE STUFF
MOVEI T1,TRNERR
TLZ S,IOSERR##
PJRST STRIOS##
FNDERB: HLLZS NMBCFP##(P4) ;DON'T LEAVE BAD CFP AROUND
PUSHJ P,SLGTX ;%GET FSN BACK
JUMPG M,STRLP9 ;%IF AN ENTER, IT'S OK
PUSHJ P,ERMNB0 ;%A.T. SAYS FILE BEING DELETED
PJRST FNER3A
FNDEND: END