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6-1-sources/info.mac
There are 24 other files named info.mac in the archive. Click here to see a list.
;<5.UTILITIES>INFO.MAC.3, 28-Oct-81 15:09:25, EDIT BY GRANT
;Change major versoin to 5
; UPD ID= 19, SNARK:<5.UTILITIES>INFO.MAC.2, 6-Aug-81 14:31:24 by MOSER
;<MOSER>INFO.MAC.2 6-Aug-81 14:14:41, Edit by MOSER
;EDIT - 7 Properly terminate send queue at HSFALT.
;<4.UTILITIES>INFO.MAC.5, 3-Jan-80 15:25:54, EDIT BY R.ACE
;UPDATE COPYRIGHT DATE
;<4.UTILITIES>INFO.MAC.4, 10-Mar-79 13:58:34, EDIT BY KONEN
;UPDATE COPYRIGHT FOR RELEASE 4
;<4.UTILITIES>INFO.MAC.3, 18-Dec-78 17:17:38, EDIT BY R.ACE
;<4.UTILITIES>INFO.MAC.2, 18-Dec-78 12:51:01, EDIT BY R.ACE
;TCO 4.2099 - ADD DELETED-PID NOTIFICATION FUNCTION
;<4.UTILITIES>INFO.MAC.2, 27-Oct-78 08:45:56, EDIT BY R.ACE
;UPDATE VERSION NUMBER FOR RELEASE 4
;PERFORM MISCELLANEOUS SYMBOL CLEANUP
;TCO 4.2069 - ZERO BIT 35 OF ASCII TEXT WORDS FROM USER PROGRAMS
;<R.ACE>INFO.MAC.3, 26-Oct-78 11:14:49, EDIT BY R.ACE
;<R.ACE>INFO.MAC.2, 25-Oct-78 15:59:07, EDIT BY R.ACE
;<R.ACE>INFO.MAC.1, 25-Oct-78 15:30:09, EDIT BY R.ACE
;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY ONLY BE USED
; OR COPIED IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE.
;
;COPYRIGHT (C) 1976,1977,1978,1979,1980 BY DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
SEARCH MONSYM,MACSYM
.REQUIRE SYS:MACREL
TITLE INFO
SALL
REPEAT 0 ,<
THIS IS [SYSTEM]INFO FOR TOPS-20. IT PERFORMS THE NECESSARY
FUNCTION OF MAPPING GENERIC NAMES OT PIDS. ALSO IT SUPPORTS THE
ONE PRIVILEGED FUNCTION OF DISASSOCIATING NAMES FROM
PIDS WHICH ARE BEING DROPPED. NONE OF THE OTHER PRIVILEGED TOPS10
INFO FUNCTIONS ARE SUPPORTED AS THE MUTIL JSYS REPLACES THESE
CLUMSY AND INEFFICIENT FUNCTIONS. ALSO, THE FOLLOWING ENHANCEMENTS HAVE
BEEN MADE TO INFO:
1) GENERIC NAMES MAY BE OF ANY LENGTH.
2) GENERIC NAMES MAY CONTAIN DIRECTORY NAMES BETWEEN
THE SQUARE BRACKETS.
3) ANGLE BRACKETS ARE ACCEPTABLE IN GENERIC NAMES
>
; VERSION NUMBER DEFINITIONS
VMAJOR==5 ;MAJOR VERSION OF INFO
VMINOR==0 ;MINOR VERSION NUMBER
VEDIT==7 ;EDIT NUMBER
VWHO==0 ;GROUP WHO LAST EDITED PROGRAM (0=DEC DEVELOPMENT)
VINFO== <VWHO>B2+<VMAJOR>B11+<VMINOR>B17+VEDIT
DEFINE FATAL (MESSO) <
JRST [ HRROI A,[ASCIZ /?'MESSO'
/]
PSOUT
HALTF]
>
DEFINE VERSIZ (LEN,VALU)< ;;DO SIZE VERFICATION
IFIDN <VALU>,<>,<MOVEI A,.IPCUF> ;;DEFAULT ERROR
IFDIF <VALU>,<>,<MOVEI A,VALU> ;;USE PROVIDED VALUE
HLRZ B,MESSER ;;GET SIZE OF RECEIVED MESSAGE
CAIGE B,LEN ;;BIG ENOUGH?
JRST NACK1 ;;NO. FOO ON IT
>
DEFINE ERROR (MESSO) <
JRST [ HRROI A,[ASCIZ /?'MESSO'
/]
PSOUT
MOVE P,[IOWD STKSIZ,STACK]
MOVEI A,.PRIOU
MOVE B,[.FHSLF,,-1]
ERSTR
JFCL
JFCL
JRST TRYAGN]
>
;DEFINE REGISTERS
F==0
A==1
B==2
C==3
D==4
W==5
W1==6
W2==7
W3==10
W4==11
W5==12
P==17
;DEFINE HEADER OFFSETS
NODE==2
STRING==2
PID==1
SIZZ==0
DPNRPD==1
DPNWPD==2
DPNSZ==3
REPEAT 0,< *** D A T A S T R U C T U R E S ***
Format of entries on USE list
!=======================================================! / \
SIZZ ! L ! LINK TO NEXT ENTRY ! !
!-------------------------------------------------------! !
PID ! PID ! !
!-------------------------------------------------------! L
STRING ! ! !
\ PID NAME (ASCII) \ !
! ! !
!=======================================================! \ /
Format of entries on IPCF-SEND queue
!=======================================================! / \
! L ! LINK TO NEXT ENTRY ! !
!-------------------------------------------------------! !
! RETRY COUNT ! !
!-------------------------------------------------------! !
! ! !
\ IPCF PACKET DESCRIPTOR BLOCK (PDB) \ L
! ! !
!-------------------------------------------------------! !
! ! !
\ IPCF MESSAGE \ !
! ! !
!=======================================================! \ /
Format of entries on DELETED-PID-NOTIFY (DPN) list
!=======================================================! / \
! L ! LINK TO NEXT ENTRY ! !
!-------------------------------------------------------! !
DPNRPD ! PID THAT WILL RECEIVE NOTIFICATION ! L=3
!-------------------------------------------------------! !
DPNWPD ! PID THAT IS BEING WATCHED ! !
!=======================================================! \ /
>;END REPEAT 0
;DEFINE LOCAL STORAGE
TSTDIR: ASCIZ /PS:</
BLOCK 11 ;BUFFER FOR TESTING DIR NAME
ADD1: Z 0
LEVTAB: Z ADD1
Z ADD1
Z ADD1 ;LEVEL TABLE FOR INTS
CHNTAB: 1,,GOTONE ;INT FOR PACKET READY
STKSIZ==30 ;PDL SIZE
STACK: BLOCK STKSIZ ;RESERVE THE STACK
OUTTER: Z 0
BLOCK 3 ;SSEND BLOCK
HEATER: Z .MUQRY
HEADER: Z 0 ;MESSAGE RECEIVE BLOCK
SEND: Z 0 ;SENDER'S PID
RCVPID: Z 0 ;MY PID
MESSER: XWD 1000,MESBUF ;FOR GETTINGF A MESSAGE
DIRS: Z 0 ;LOGGED IN DIR
PRIVS: Z 0 ;PRIVILEGES
CDIRS: Z 0 ;CONNECTED DIR
MYPID: Z 0 ;SAVE MY PID
MSGBUF==676000
MESBUF==MSGBUF ;PUT ON PAGE BOUNDARY
FRESIZ==3000 ;3 PAGES OF FREE SPACE
USEHD: Z 0 ;HEADER FOR IN USE BLOCKS
FREHD: Z 0 ;FREE SPACE HEADER
DPNHD: Z 0 ;HEADER FOR NOTIFICATION LIST
SENDQ: Z 0 ;THE SEND QUEUE
CPYPID: Z 0 ;PID TO GET C OPY OF REPLY
MAXTRY==5 ;MAX TRIES FOR HIS QUTA OVER
;PROGRAM ENTRY VECTOR
ENTVEC: JRST INFO ;STARTING LOCATION
JRST INFO ;REENTER LOCATION
VINFO ;VERSION NUMBER
;THESE ARE THE FREE SPACE MANIPULATION ROUTINES. THEY DESTROY
;ALL OF THE WORK REGISTERS.
; ALLOC - ALLOCATE FREE SPACE; USES THE SMALLEST BLOCK OF AVAILABLE
; AVAILABLE STORAGE TO SATIFSY THE REQUEST. UNUSED PORTIONS OF
; FREE BLOCKS ARE LEFT ON THE QUEUE
; A/ SIZE OF DESIRED BLOCK (WORDS)
; RETURNS +1: NO BLOCKS OF REQUESTED SIZE AVAILABLE
; +2: BLOCK ALLOCATED, A/ ADDRESS
; NOTE: LH OF 1ST WORD OF BLOCK CONTAINS COUNT - DON'T ALTER
ALLOC: SETZB W4,W5 ;POINTER AND SIZE OF BLOCK
MOVEI W,FREHD ;WHERE IT ALL STARTS
LOOK: HRRZ W2,(W) ;WHERE NEXT BLOCK IS
JUMPE W2,FINAL ;AT THE END. LOOK AT WHAT WE HAVD
HLRZ W1,(W2) ;COUNT
CAIN W1,(A) ;EXACT MATCH?
JRST USEIT ;YES. DO IT
CAIG W1,(A) ;BIG ENOUGH?
JRST NOPE ;NO. FOO
;FOUND A CANDIDATE. SEE IF HE'S BETTER THAN THE LAST
SKIPE W5 ;GOT ONE YET?
CAIGE W1,(W5) ;YES. THIS ONE BETTER?
SKIPA W5,W1 ;YES. USE IT
JRST NOPE ;NO
MOVE W4,W ;REMEMBER POINTER
NOPE: HRRZ W,(W) ;GET NEXT BLOCK
JRST LOOK ;GO PROCESS IT
FINAL: SKIPN W1,W5 ;FOUND A GOOD ONE?
RET ;NO. BOMB TIME
MOVE W,W4 ;POINTER
USEIT: HRRZ W4,(W) ;AREA TO ALLOCATE
MOVNI W1,(A) ;NUMBRE OF WORDS NEEDED
HRLZS W1 ;NEGATIVE TO LEFT HALF
ADD W1,(W4) ;DO IT
ADDI W4,(A) ;WHERE NRW BLOCK IS
TLNN W1,-1 ;ANYTHING LEFT IN THE BLOCK?
JRST [ HRRZ W4,0(W) ;NO. GET THE BLOCK ADDRESS AGAIN
HRRZ W4,0(W4) ;AND GET NEXT BLOCK ON THE FREE LIST
JRST USEI1] ;AND MAKE THIS NEXT
MOVEM W1,0(W4) ;YES. MAKE IT A NEW BLOCK
USEI1: HRRZ W5,(W)
HRLZM A,(W5) ;ASSIGNED BLOCK
HRRM W4,(W) ;LINK IN NEW FREE BLOCK
MOVEI A,(W5) ;WHAT WE ASSIGNED
RETSKP ;GOOD RETURN
; DEALL - RETURN BLOCK TO FREE SPACE POOL
; A/ ADDRESS OF BLOCK
; RETURNS +1: ALWAYS
;DEALL WILL MERGE TOGETHER ADJACENT BLOCKS ON EACH RETURN OF A BLOCK
DEALL: MOVEI W,FREHD
LOOK1: HRRZ W1,(W) ;BLOCK HEAD
JUMPE W1,HERE ;IF AT THE END IT GOES HERE
CAIL W1,(A) ;PAST THIS BLOCK?
JRST HERE ;YES. PU IT IN HERE
MOVE W,W1 ;NO. STEP
JRST LOOK1 ;GO DO MORE
HERE: CAIN W,FREHD ;AT THE TOP?
JRST LNKDWN ;YES. CANT MERGE UP
HLRZ W1,(W) ;GET SIZE OF PREVIOUS
ADDI W1,(W) ;TO THE END
CAIE W1,(A) ;UP TO THE BLOCK RELEASING?
JRST LNKDWN ;NO. LINK IT IN
HLRZ W2,(A) ;DO THE MERGE
HLRZ W1,(W)
ADDI W1,(W2) ;NEW TOTAL SIZE
SETZM (A) ;BLOT OUT THIS HEADER
HRLM W1,(W) ;NEW COUNT
JRST SEEDWN ;TRY TO MERGE DOWN
LNKDWN: HRRZ W2,(W) ;LINK TO NEXT
HRRM A,(W) ;PUT THIS NEW BLOCK IN
HRRM W2,(A) ;AND PUT OLD LINK IN IT
MOVE W,A ;NEW BASE BLOCK
SEEDWN: HLRZ W1,(W) ;COUNRT
ADDI W1,(W) ;END OF THIS BLOCK
HRRZ W2,(W) ;NEXT BLOCK
CAIE W1,(W2) ;THIS IT?
RET ;NO. DONE
HLRZ W3,(W2) ;YES. MUST MERGE THEM
HLRZ W1,(W) ;COUNT OF PREVIOUS
ADDI W3,(W1) ;NEW COUNT OF MERGED BLOCKS
HRLM W3,(W)
HRRZ W3,(W2) ;ITS LINK
HRRM W3,(W) ;NEW DOWN LINK FOR THIS GUY
SETZM (W2) ;CLEAR IT
RET ;ALL DONE
;THIS ROUTINE TAKES AN ASCIZ NAME AND VERIFIESS IT AND
;PACKS IT INTO N CONTIGUOUS WORDS.
NAME1: TDZA F,F ;NO SYNTAX PLEASE
NAME: MOVEI F,1 ;SYNTAX TOO
MOVE W,[POINT 7,MESBUF+2] ;POINTER TO THE NAME
SCAN: ILDB W1,W ;GET BYTE
JUMPE W1,ALLDNE ;AT THE END
SKIPN F ;SYNTAX TOO?
JRST SCAN ;NO. JUST DO NAME
CAIE W1,"<" ;DIRECTORY SPECIFIED?
CAIN W1,"[" ;"
JRST INDIR ;YES. MUST VERIFY IT
JRST SCAN ;CONTINUE
INDIR: MOVE W5,[POINT 7,TSTDIR,20] ;GET POINTER FOR NAME
IDPB W1,W5 ;STORE THE PUNCTUATION
INDIR1: ILDB W1,W ;NEXT BYTE
IDPB W1,W5 ;SAVE BYTE
JUMPE W1,R ;ILLEGAL SYNTAX
CAIE W1,">" ;END OF NAME?
CAIN W1,"]" ;SAME HERE
SKIPA
JRST INDIR1
MOVE W3,PRIVS ;LLOOK AT HIS PRIVILEGES
TRNE W3,600000 ;WHEEL OR OPERATOR?
JRST SCAN ;YES. DONT VERIFY
MOVE A,W5 ;MOVE POINTER
SETZ W1, ;GET A NULL
IDPB W1,A ;TIE OFF THE STRING
MOVX A,RC%EMO ;MAKE EXACT MATCH ONLY
HRROI B,TSTDIR ;THE STRING
RCDIR ;GO SEE IF IT EXISTS
ERJMP FINE ;NOT A DIR.
TXNE A,RC%NOM!RC%AMB ;FOUND IT?
JRST FINE ;NO. GIVE UP THEN
CAMN C,CDIRS ;IS THIS THE JOB'S CONNECTED DIR?
JRST FINE ;YES. ALL DONE THEN
DPB W1,W5 ;TIE OFF STRING FOR USER NUMBER
MOVX A,RC%EMO ;EXACT MATCH AGAIN
MOVE B,[POINT 7,TSTDIR,27] ;WHERE STRING IS
RCUSR ;GET USER NAME
ERJMP R ;IF ERROR, DISALLOW THIS NAME
TXNE A,RC%NOM!RC%AMB ;FOUND IT?
RET ;NO, DISALLOW IT THEN
CAME C,DIRS ;IS THIS THE LOGGED IN DIR?
RET ;NO, ERROR THEN
FINE: JRST SCAN ;AND GO ON
ALLDNE: MOVEI A,(W) ;WHERE IRT ENDED
SUBI A,MESBUF+1 ;WORDSS IN TEXT
TLNE W,200000 ;SEE IF NULL IS AT START OF A WORD
TLNN W,100000 ;"
SKIPA ;ITS NOT. USE CURRENT COUNT
JRST [ SOSE A ;IT IS. DECREMENT AND VERIFY
JRST R35 ;MORE THAN 0 WORDS
RET] ;DONE
LDB D,[POINT 6,W,5] ;GET BYTE POSITION
SETZ B, ;WHERE MASK WILL BE ACCUMULATED
SETO C, ;A WORD FULL OF BITS
LSHC B,0(D) ;BUILD MASK
ANDCAM B,0(W) ;GET RID OF EXTRANEOUS BITS IN LAST WORD
; RESET BIT 35 OF ALL WORDS IN THE NAME
R35: MOVE B,A ;COPY # OF WORDS
MOVEI C,1 ;GET RESET VALUE (1B35)
R351: ANDCAM C,MESBUF+1(B) ;RESET BIT 35 OF A WORD
SOJG B,R351 ;LOOP THRU ALL WORDS
RETSKP ;GIVE SUCCESSFUL RETURN
;ROUTINE TO LOOK UP AN ASCIZ NAME IN ASSIGNED BLOCKS
;RETURNS A=BLOCK FOUND. W=POINTER TO PREVIOUS
LOOKUP: MOVEI W,USEHD ;THE HEAD OF THEM ALL
LOOK2: HRRZ W1,(W) ;GET NEXT ITEM
JUMPE W1,R ;FAILED TO FIND IT
JUMPL B,[CAME A,PID(W1) ;PID MATCH?
JRST MORE ;NO
JRST GOOD]
HLRZ W4,SIZZ(W1) ;GET COUNT OF THIS ONE
SUBI W4,NODE ;DATA CONTENTS ONLY
CAIE B,(W4) ;SAME SIZE?
JRST MORE ;NO. GET MORE
MOVEI W2,STRING(W1) ;WHERE STRING IS
MOVE W5,A
CMPAR: MOVE W3,(W5) ;NEXT WORD
CAME W3,(W2) ;MATCH?
JRST MORE ;NO
AOS W5
AOS W2
SOJG W4,CMPAR ;DO ALL
GOOD: MOVE A,W1
RETSKP ;FOUND A MATCH
MORE: MOVE W,W1 ;GO ON
JRST LOOK2
;BEGINNING OF INFO
INFO: MOVEI A,400000
MOVE B,[LEVTAB,,CHNTAB] ;FOR INTS
SIR ;ESTABLISH INTS
MOVNI B,1
DIC ;DISSBALE EVERYTHING
MOVSI B,(1B0) ;IPCF CHANNEL
AIC ;ACTIVATE
MOVE A,44 ;FIRST FREE PAGE -1
MOVEI A,1(A) ;FIRST FREE PAGE
MOVEM A,FREHD ;INIT FREE SPACE HEADER
MOVEI B,MSGBUF ;END OF FREE SPACE
SUBI B,(A) ;SIZE OF FREE PSACE
HRLM B,(A) ;INIT FREE SPACE
MOVE P,[IOWD STKSIZ,STACK] ;INIT PDL
MOVEI W,.MUGTI ;MAKE SURE NO INFO AROUND
MOVEI A,3
MOVEI B,W ;WHERE STUFF IS
SETO W1, ;FOR ME ONLY
MUTIL ;GET INFO'S PID
SKIPA ;OK
FATAL <[SYSTEM]INFO ALREADY EXISTS>
MOVEI W,.MUSPQ ;SET PID QUOTAS
MOVEI W2,777 ;MAX NUMBER OF PIDS
MUTIL ;GO SET THEM
MOVEI A,3 ;RESTORE THIS
MOVEI W,.MUCRE ;GET ME A PID
MOVEI W1,400000 ;TEMP
MUTIL ;GET IT
FATAL <INFO: COULD NOT ASSIGN A PID>
MOVEM W2,MYPID ;STASH
;NOW DECLARE ME TO BE [SYSTEM]INFO
MOVE W1,W2 ;ARG TO LOC+1
MOVEI W,.MUDFI ;THE FUNCTION TO DO IT
MUTIL ;AND DO IT
FATAL <INFO: COULD NOT SET UP TO BE INFO>
;NOW PUT THE PID ON CHANNEL 0
MOVEI A,3 ;PACKET SIZE
MOVEI B,W ;PACKET ADDRESS
MOVEI W,.MUPIC ;THE PSI FUNCTION
MOVE W1,MYPID ;THE PID TO INT ON
SETZ W2, ;ONTO CHANNEL 0
MUTIL ;DO IT
JFCL ;SHOULD GO .IF NO,C'EST LA VIE
;NOW SEND EVERYONE THE INFO STATUP MESSAGE
MOVE A,[SIXBIT/JOBTTY/] ;GET NO OF JOBS IN SYSTEM
SYSGT ;GET IT
JFCL
HLLZ W,B ;SAVE COUNT
MOVX A,FLD(.IPCCF,IP%CFC)+FLD(.IPCSN,IP%CFE) ;SAY FROM INFO
MOVEM A,OUTTER
SETZM MSGBUF ;CLEAR MEAAGE WORD
DOJOB: MOVEI W1,.MUGTI ;GET HIS INFO PID
MOVEI W2,(W)
MOVEI A,3
MOVEI B,W1
MUTIL ;DO IT
JRST NOPID ;IMPOSSIBLE,BUT DONT PANIC IF IT HAPPENS
CAME W3,MYPID ;AM I HIS INFO?
JRST NOPID ;NO. FORGET HIM THEN
MOVEI W1,.MUFJP ;GET PED FOR JOB FUNCTION
MOVEM W1,MSGBUF+1
HRRZM W,MSGBUF+2 ;THE JOB NUMBER
MOVEI A,777 ;WORD COUNT
MOVEI B,MSGBUF+1 ;THE PACKET
MUTIL ;GET THE PIDS
JRST NOPID ;NO PID FOR YHIS JOB
MOVEI A,MSGBUF+3 ;START OF PIDS
PUSH P,W ;SAVE JOB INDEX
LOOP: SKIPN B,(A) ;A PID?
JRST NOPID1 ;NO. END OF LIST
ADDI A,2 ;NEXT ENTRY
CAMN B,MYPID ;IS IT ME?
JRST LOOP ;YESS. IGNORE IT
PUSH P,A ;SAVE PID POINTER
MOVEM B,SEND ;FAKE OUT SENDIT
MOVEI B,1 ;ONE WORD MESSAGE
CALL SENDIT ;SEND OFF THIS MESSAGE
POP P,A ;GET PID POINTER
JRST LOOP ;GO DO NEXT ONE
NOPID1: POP P,W ;GET BACK JOB INDEX
NOPID: AOBJN W,DOJOB ;DO ALL JOBS
;READY TO PROCESS REQUESSTS
TRYAGN: MOVEI A,7
MOVEI B,HEATER
MOVE W1,MYPID
MOVEM W1,HEADER ;THE ARG TO THE FUNCTION
MUTIL ;GET NEXT REQUEST IN QUEUE
JRST NONE ;NONE THERE
MOVE A,[1000,,MESBUF] ;YES
MOVE B,HEADER ;GET THE RETURNED HEADER
TRNE B,IP%CFV ;PAGE MODE?
HRRI A,<MESBUF>_<-11> ;YES. PLUG IN PAGE NUMBER
MOVEM A,HEADER+3 ;WHERE TO PUT NEXT MESSAGE
MOVSI A,(IP%CFB) ;DONT BLOCK
IORM A,HEADER ;TO THE HEADER
MOVEI A,7 ;# OF WORDS IN HEADER
MOVE B,MYPID ;GET MY PID
MOVEM B,RCVPID ;PUT IN AS RECEIVER
MOVEI B,HEADER
MRECV ;GET NEXT REQUEST.
ERROR <IMPOSSIBLE RETURN FROM MRECV>
MOVE A,HEADER ;GET HEADER
MOVE C,PRIVS ;LOOK AT HIS PRIVILEGES
SKIPN SEND ;DID HE IDENTIFY HIMSELF?
TRNE C,600000 ;NO. IS HE PROVILEGED?
SKIPA ;DO IT
JRST [ TRNE A,FLD(.IPCCC,IP%CFC) ;FROM MONITOR?
JRST .+1 ;YES. DO IT
JRST TRYAGN] ;NO. JUNK MAIL
LOAD B,IP%CFM,A
CAIN B,.IPCFN ;UNDELIVERED MAIL?
JRST TRYAGN ;YES. GIVE IT UP
TRNN C,600000 ;PRIVILEGED?
TRNE A,IP%CFP ;NO. A PRIVILEGED REQUEST?
SKIPA B,MSGBUF+1 ;YES. BELEIVE THIS FIELD
SETZ B, ;NO. INSIST ON A ZERO
MOVEM B,CPYPID ;THE PID TO GET A COPY
HRRZ A,MESBUF ;GET THE BUFFER
SKIPE A ;VALID?
CAILE A,MAXFNC ;VALID?
JRST NACK ;ILLEGAL FUNCTION
HLRZ B,MESSER ;GET COUNT OF MESSAGE
CAILE B,^D511 ;REASONABLE LENGTH?
MOVEI B,^D511 ;NO. MAKE IT REASONABLE
SETZM MSGBUF(B) ;TIE OFF THE MESSAGE
JRST @TABLE-1(A) ;GO DO IT
;THESE ROUTINES SEND REPLYS BACK TO REQUESTORS
NORMAL: SETZM OUTTER ;ALL IS WELL
SEND1: MOVEI A,.IPCCF
STOR A,IP%CFC,OUTTER ;SENT BY INFO
CALL SENDIT ;DO THE SEND
SKIPN A,CPYPID ;NEED TO SEND A COPY?
JRST TRYAGN ;NO. GO DO SOME WORK
MOVEM A,OUTTER+2 ;TO THE PACKET
CALL RESEND ;NOW SEND THE COPY
JRST TRYAGN ;GO GET SOME MORE TO DO
SENDIT: MOVE A,MYPID
MOVEM A,OUTTER+1
SKIPN A,HEADER+1 ;DID SENDER IDENT HIMSELF?
RET ;NO. WE ARE DONE THEN
MOVEM A,OUTTER+2 ;YES. MAKE HIM THE RECEIVER
MOVSI B,(B) ;WORD COUNT TO LH
HRRI B,MSGBUF ;WHERE THE REPLY IS
MOVEM B,OUTTER+3 ;TO PACKET DESCRIPTOR
RESEND: MOVEI A,4
MOVEI B,OUTTER
SETZ F, ;NO QUOTA PROBLEMS
SKIPN SENDQ ;A SEND Q AROUND?
JRST DOSEND ;NO. DO THIS ONE
CALL ONQ ;YES. QUEUE THIS UP
AOS F ;NO MORE FREE SPACE
JRST DOQ ;GO OFF TO FLUSH Q
DOSEND: MSEND ;SEND IT OFF
JRST [ CAIN A,IPCFX4 ;PID DROPPED?
JRST .+1 ;YES. FORGET IT
JRST ADDQ] ;MUST QUEUE IT UP
CAIN B,OUTTER ;FROM QUEUE?
RET ;ALL DONE
;REQUEST FROM SEND Q.
KILLIT: HRRZ A,-2(B) ;GET Q LINK
HRRM A,SENDQ ;UNLINK IT
SKIPN A ;GOT A LINK?
SETZM SENDQ ;NO. CLEAR Q
MOVEI A,-2(B) ;BLOCK HEAD
CALL DEALL ;RELEASE BLOCK
SKIPE F ;RECOVERING FROM FREE SPACE DISIASTER?
JRST RESEND ;YES. GO DO IT
SKIPN SENDQ ;MORE STUFF IN THE QUEUE?
RET ;NO. ALL DONE THEN
;
;ROUINES TO HANDLE SEND FAILURESS
DOQ: HRRZ B,SENDQ ;DO NEXT GUY ON QUEUE
ADDI B,2
MOVEI A,4 ;COUNT ISS ALWAYS 4
JRST DOSEND ;GO TRY IT
ADDQ: CAIE B,OUTTER ;NEED OT QUEU IT UP
JRST NOQ ;NO. GO ANALYZE FAILURE
CALL ONQ ;QUEUE IT UP
JRST [ MOVEI A,3*^D1000 ;SLLEP IT OFF
DISMS
JRST RESEND] ;GO TRY IT AGAIN
SETZ F, ;FREE SSPACE IS OK
RET ;ALL DONE
NOQ: CAIE A,IPCFX5 ;PID DISABLED?
CAIN A,IPCFX7 ;OR IS HE OVER QUOTA?
JRST HSFALT ;YES. CHARGE HIM
SKIPE F ;FREE SPACE BADDYS?
JRST DOQ ;YES. GO TRY TO DO MORE
RET ;NO ALL DONE
HSFALT: AOS A,-1(B) ;BUMP RETRY COUNT
CAIL A,MAXTRY ;TOO ANY TRIES
JRST KILLIT ;YES. GIVE HIM UP
HRRZ A,-2(B) ;UNLINK IT
HRRM A,SENDQ
SKIPN A
SETZM SENDQ ;EMPTY QUEUE
MOVEI A,-2(B) ;BLOCK HEAD
CALL INITQ ;PUT IT ON THE QUEUE
JFCL
HLLZS -2(B) ;TERMINATE SEND QUEUE.
SKIPE F ;FREE SPACE WOES?
JRST DOQ ;YES. TRY TO FLUSH
RET ;NO. ALL DONE
NACK: MOVEI A,.IPCUF ;ILLEGAL FUNCTION
NACK1: LSH A,^D35-POS(IP%CFE) ;SHIFT ERROR CODE INTO PROPER FIELD
MOVEM A,OUTTER ;TELL HIM
MOVEI B,1 ;ONE WORD IN MESSAGE
JRST SEND1
;THIS ROUTINE ADDS A SEND REQUEST TO THE SEND Q
ONQ: HLRZ B,OUTTER+3 ;SIZE OF THE MESSAGE
MOVEI A,6(B) ;WORDS NEEDED
CALL ALLOC ;GET SOME SPACE
RET ;NONE THERE
SETZM 1(A) ;INITIALIZE RETRY COUNT
MOVEI B,2(A) ;START OF DTAT AREA
HRLI B,OUTTER ;START OF BLT
BLT B,5(A) ;MOVE THE HEADER BLOCK
MOVEI B,6(A) ;INDEX INTO DATA PART
HRRM B,5(A) ;NEW DATA POINTER
HRLI B,MSGBUF ;START OF BLT FOT THE DATA
HLRZ C,OUTTER+3 ;COUNT
ADDI C,-1(B) ;WHERE ALL THIS WILL END
BLT B,(C) ;DO IT
INITQ: HLRZ C,SENDQ ;TAIL FO QUEUE
HRLM A,SENDQ ;NEW TAIL
SKIPN C ;EMPTY QUEUE?
MOVEI C,SENDQ ;YES
HRRM A,(C) ;COMPLETE LINK
RETSKP ;ALL DONE
;BEGINNING OF PROCESSING ROUTINES
NONE: SKIPE SENDQ ;STUFF TO SEND?
JRST [ MOVEI A,^D500 ;SLEEP FOR .5 SECS
DISMS ;DO IT
CALL DOQ ;NOW DO SOME SENDS
JRST TRYAGN] ;AND GO TO GET MORE
MOVEI A,400000 ;THIS FORK'S ID
EIR ;TURN ON INTERRUPTS
WAIT ;INFINITE SLEEP
GOTONE: DIR ;TURN OFF INTERRUPTS
MOVEI A,TRYAGN
MOVEM A,ADD1 ;TO GO THERE
DEBRK
;TRANSFER TABLE FOR INFO FUNCTIONS
TABLE: IPCIW ;FIND PID FOR NAME
IPCIG ;FIND NAME FOR PID
IPCII ;ASSIGN TEMP NAME
IPCIJ ;ASSIGN PERMANENT NAME
IPCIK ;NOTIFY WHEN PID IS DELETED
NACK
NACK
REPEAT 5,<NACK> ;UNIMPLEMENTED FUNCTIONS
IPCIS ;IPCC NOTICE
MAXFNC==.-TABLE ;MAXIMUM FUNCTION NUMBER
;FUNCTION 1. FIND PID FOR GIVEN NAME
IPCIW: VERSIZ 3,.IPCEN ;MUST BE AT LEAST 3 WORDS
CALL NAME1 ;GET NAME
JFCL
MOVE B,A
MOVEI A,MESBUF+2 ;WHERE NAME IS
CALL LOOKUP ;SEE IF ITS DEFINED
JRST [ MOVEI A,.IPCNN ;UNKNOWN NAME
JRST NACK1] ;BOMB HIM
MOVE B,PID(A) ;THE PID
CALL VERPID ;VERIFY PID
JRST KILL1 ;IT'S GONE AWAY
MOVEM B,MESBUF+1 ;ANSWER
MOVEI B,2 ;SIZE OF REPLY
JRST NORMAL ;TELL HIM OF OUR SUCCESS
;THESE ROUTINES VERIFY PIDS
VERPID: MOVEI W1,.MUFOJ ;GET JOB NO
MOVE W2,B ;OF THIS PID
PUSH P,A ;SAVE A
PUSH P,B
MOVEI A,3
MOVEI B,W1
MUTIL ;GET IT
JRST [ POP P,B
POP P,A
RET] ;BAD
POP P,B
POP P,A ;GET A ABCK
RETSKP ;TELL CALLER PID IS GOOD
KILL: SKIPA W1,[.IPCBP]
KILL1: MOVEI W1,.IPCNN
PUSH P,W1 ;SAVE ERROR MESSAGE
CALL UNCHN ;UNDO THIS REQUEST AND RELEASE SPACE
POP P,A ;GET ERROR MESSAGE
JRST NACK1 ;DONE
UNCHN: MOVE W1,(A) ;LINK TO NEXT GUY
HRRM W1,(W) ;UNLINK THIS GUY
CALL DEALL ;AND RELEASE REQUEST
RET ;RETURN
;FUNCTION 2. FIND NAME FOR GIVEN PID
IPCIG: VERSIZ 3,.IPCBP ;MUST BE AT LEAST 3 WORDS
SETO B, ;LOOKING FOR PID
MOVE A,MESBUF+2 ;THE PID
CALL LOOKUP
JRST [ MOVEI A,.IPCBP ;UNKNOWN PID
JRST NACK1] ;RETURN ERROR
MOVE B,PID(A) ;THE PID
CALL VERPID ;MAKE SURE PID IS GOOD
JRST KILL ;IT'S NOT
HLRZ W,SIZZ(A) ;COUNT OF WORDS
MOVEI W1,STRING(A)
MOVEI W2,MESBUF+1
SUBI W,NODE
MOVEI B,1(W)
MOVIT: MOVE W3,(W1)
MOVEM W3,(W2)
AOS W1
AOS W2
SOJG W,MOVIT ;MOVE WHOLE NAME
JRST NORMAL
;FUNCTIONS 3 AND 4. ASSIGN NAME TO PID
IPCII:IPCIJ:
VERSIZ 3,.IPCEN ;MUST BE AT LEAST 3 WORDS
CALL NAME ;GET THE NAME
JRST [ MOVEI A,.IPCEN ;BAD NAME
JRST NACK1] ;BOMB HIM
MOVE B,A ;SIZE
MOVEI A,MSGBUF+2 ;WHERE THE NAME IS
CALL LOOKUP ;SEE IF DEFINED
JRST ISGOOD ;GOOD NAME
PUSH P,B ;SAVE SIZE
MOVE B,PID(A) ;THD QSSIGNED PID
CALL VERPID ;SEE IF PID IS GOOD
JRST [ CALL UNCHN ;NO IT'S NOT
POP P,B ;GET SIZE
JRST ISGOOD] ;GO ASSIGN IT
POP P,B ;IT'S GOOD
MOVE B,PID(A) ;GET PID AGAIN
CAMN B,SEND ;SAME AS REQUESTOR'S
JRST ALLWIT ;YES. ALLOW IT
MOVEI A,.IPCDN ;GIVE ERROR
JRST NACK1
ISGOOD: MOVEI A,NODE(B) ;SIZE NEEDED
CALL ALLOC ;GET SOME FREE SPACE
JRST [ MOVEI A,.IPCFF ;NO MORE FREE SPACE
JRST NACK1] ;TELL HIM
MOVE B,SEND
MOVEM B,PID(A) ;PUTPID IN PID
MOVEM B,MSGBUF+1 ;REPLY
HLRZ B,SIZZ(A)
SUBI B,NODE
MOVEI W,MSGBUF+2
MOVEI W1,STRING(A)
STOR: MOVE W2,(W) ;GET A WORD
MOVEM W2,(W1)
AOS W
AOS W1
SOJG B,STOR ;DO ENTIRE NAME
;NOW INSERT PACKET INTO ASSIGNED QUEUE
MOVE B,USEHD ;TOP OF QUEUE
MOVEM A,USEHD ;STASH IT
HRRM B,(A) ;COMPLETE LINK
ALLWIT: MOVEI B,2
JRST NORMAL ;TELL HIM IT'S DONE
;FUNCTION 5. INFORM SENDER WHEN SPECIFIED PID IS DELETED
IPCIK: VERSIZ 3,.IPCBP ;MUST BE AT LEAST 3 WORDS
MOVX A,SC%WHL+SC%OPR+SC%IPC
TDNN A,PRIVS ;SENDER PRIVILEGED?
JRST [ MOVEI A,.IPCPI ;NO
JRST NACK1] ;RETURN ERROR
MOVE B,MSGBUF+2 ;GET PID TO BE WATCHED
CALL VERPID ;GOOD PID?
JRST [ MOVEI A,.IPCBP ;NO
JRST NACK1]
; CHECK FOR AN EXISTING ENTRY WITH SAME PIDS
MOVE A,SEND ;GET REQUESTOR'S PID
MOVE B,MSGBUF+2 ;GET WATCHED PID
MOVEI W,DPNHD ;GET HEAD OF CURRENT LIST
IPCIK1: HRRZ W,(W) ;GET NEXT ENTRY IN DPN LIST
JUMPN W,[CAMN A,DPNRPD(W) ;CHECK FOR MATCH
CAME B,DPNWPD(W)
JRST IPCIK1 ;NO MATCH, CHECK NEXT ENTRY
JRST IPCIK2] ;HAS ALREADY BEEN REQUESTED
; CREATE ENTRY IN NOTIFICATION LIST
MOVEI A,DPNSZ ;GET SIZE OF DPN ENTRY
CALL ALLOC ;ALLOCATE FREE SPACE TO REMEMBER IT
JRST [ MOVEI A,.IPCFF ;FREE SPACE EXHAUSTED
JRST NACK1]
MOVE B,SEND ;GET REQUESTOR'S PID
MOVEM B,DPNRPD(A) ;STORE IT
MOVE B,MSGBUF+2 ;GET WATCHED PID
MOVEM B,DPNWPD(A) ;PUT IN LIST ENTRY
; LINK THIS ENTRY ONTO THE LIST
MOVE B,DPNHD ;GET CURRENT HEAD
HRRM B,(A) ;POINT NEW HEAD AT OLD HEAD
MOVEM A,DPNHD ;SET NEW HEAD
IPCIK2: MOVE B,MSGBUF+2 ;GET WATCHED PID
MOVEM B,MSGBUF+1 ;PUT IN RETURN MESSAGE
MOVEI B,2 ;GET SIZE OF RESPONSE
JRST NORMAL ;SEND GOOD RESPONSE TO REQUESTOR
;FUNCTION 15. MESSAGE FROM MONITOR TO DROP PIDS
IPCIS: MOVE W5,PRIVS ;MUST BE PRIVILEGED
MOVE A,HEADER ;GET HEADER WORD TOO
TXNN W5,SC%WHL+SC%OPR ;IS HE PRIVILEGED?
TRNE A,FLD(.IPCCC,IP%CFC) ;NO. IS HE THE MONITOR?
SKIPA ;YES. LET HIM DO IT THEN
JRST [ MOVEI A,.IPCPI ;INSUFFICIENT PRIVILEGES
JRST NACK1] ;GIVE HIM THE ERROR
PUSH P,[MSGBUF+1] ;SET UP TO SCAN PID LIST
LOOK3: AOS (P) ;POINT AT NEXT PID
SKIPN A,@(P) ;END OF LIST?
JRST [ ADJSP P,-1 ;YES, DELETE PID LIST POINTER FROM STACK
MOVEI B,1 ;GET SIZE OF MESSAGE
JRST NORMAL] ;SEND GOOD RESPONSE
CALL SDPN ;TELL ANYONE WHO WANTS TO KNOW
LOOK4: MOVE A,@(P) ;GET PID
SETO B, ;PID SEARCH
CALL LOOKUP ;LOOK FOR IT
JRST LOOK3 ;NONE FOUND
CALL UNCHN ;DELETE ENTRY FROM USE-LIST
JRST LOOK4 ;LOOP FOR ALL NAMES
; SDPN - CALLED WHEN MONITOR TELLS INFO THAT PIDS HAVE BEEN DELETED;
; SEARCHES NOTIFY LIST AND TELLS ANYONE WHO WANTS TO KNOW
; A/ DELETED PID
; RETURNS +1: ALWAYS
SDPN: STKVAR <SDPWPD>
MOVEM A,SDPWPD ;STORE DELETED PID
SDPN1: MOVE W1,SDPWPD ;GET PID
MOVEI W,DPNHD ;SET UP TO SCAN DPN LIST
SDPN2: HRRZ A,(W) ;GET NEXT ENTRY IN DPN LIST
JUMPE A,R ;END OF LIST, EXIT
CAMN W1,DPNRPD(A) ;RECEIVER'S PID DELETED?
JRST [ CALL UNCHN ;YES, JUST DELETE ENTRY FROM LIST
JRST SDPN1] ;GO BACK FOR ANOTHER SCAN
CAMN W1,DPNWPD(A) ;WATCHED PID DELETED?
JRST [ CALL SNDDPN ;YES, NOTIFY RECEIVER PID
JRST SDPN1] ;GO SCAN AGAIN
MOVE W,A ;NO MATCHES, STEP TO NEXT ENTRY
JRST SDPN2
; SNDDPN - NOTIFY USER THAT A PID HAS BEEN DELETED, AND REMOVE ENTRY
; FROM NOTIFICATION LIST
; A/ ADDRESS OF DPN LIST ENTRY
; W/ ADDRESS OF PREVIOUS ENTRY (FOR UNCHN)
; RETURNS +1: ALWAYS
SNDDPN: PUSH P,SEND ;SAVE CURRENT SENDER'S PID
PUSH P,MSGBUF ;SAVE CURRENT SENDER'S .IPCI0 WORD
MOVE B,DPNWPD(A) ;GET DELETED PID
MOVEM B,MSGBUF ;BUILD MESSAGE (1 WORD)
MOVE B,DPNRPD(A) ;GET RECEIVER'S PID
MOVEM B,SEND ;STORE IT FOR SENDIT
MOVX B,FLD(.IPCKM,IP%CFE)+FLD(.IPCCF,IP%CFC)
MOVEM B,OUTTER ;SET UP WORD 0 OF PDB
CALL UNCHN ;REMOVE DPN ENTRY AND RELEASE FREE SPACE
MOVEI B,1 ;GET SIZE OF MESSAGE
CALL SENDIT ;SEND TO REQUESTOR
POP P,MSGBUF ;RESTORE .IPCI0 WORD
POP P,SEND ;RESTORE PID
RET
END <3,,ENTVEC>