Trailing-Edge
-
PDP-10 Archives
-
SRI_NIC_PERM_SRC_3_19910112
-
mm-dom/what.mac
There are 2 other files named what.mac in the archive. Click here to see a list.
TITLE WHAT - What was that last TTY message?
SUBTTL Kirk Lougheed/KSL/FMF/MDP/DE/MRC/WHP4
SEARCH MONSYM,MACSYM
.REQUIRE SYS:MACREL
.TEXT "WHAT/SAVE" ;Save as WHAT.EXE
ASUPPRESS
COMMENT \
WHAT is invoked from the EXEC to type out the last N messages in the
user's SENDS.TXT file, optionally specifying messages from a specific
person. The default value of N is one. Examples of use:
@WHAT !Type out last message
@WHAT 3 !Type out last three messages
@WHAT -3 !Type out third last message
@WHAT * !Type out all messages
@WHAT F.FMF !Type out last message from user F.FMF
@WHAT F.FMF 3 !Type out last three messages from F.FMF
@WHAT 3 F.FMF !Same as above
@WHAT F.FMF -3 !Type out third last message from F.FMF
@WHAT -3 F.FMF !Same as above
@WHAT F.FMF * !Type out all messages from F.FMF
@WHAT * F.FMF !Same as above
Original program by Kirk Lougheed with extensive improvements by
Frank Fujimoto and Mike Peeler.
\
SUBTTL Definitions
A=:1 ;Scratch ACs
B=:2
C=:3
D=:4
E=:5
PT=:6 ;Byte pointer
LP=:7 ;Counter for number of bytes seen
CT=:10 ;Counter for number of messages seen
FP=:15 ;Frame pointer for TRVARs
CX=:16 ;Scratch for MACREL
P=:17 ;Pointer to control stack
SNDPAG==10 ;Read file to this page
SNDADR==SNDPAG*1000
PDLEN==10 ;Length of pushdown stack
BUFLEN==10 ;Length of directory string buffer
NAMLEN==10 ;Length of user name
CMDBSZ==100 ;Length of command buffer
ATMBSZ==100 ;Length of atom buffer
PDLIST: BLOCK PDLEN ;Pushdown list
BUFFER: BLOCK BUFLEN ;Directory string buffer
CMDBUF: BLOCK CMDBSZ ;Command buffer
ATMBUF: BLOCK ATMBSZ ;Atom buffer
GTJBLK: BLOCK .GJATR+1 ;Block for GTJFN for COMND
USERNM: BLOCK NAMLEN ;Buffer for user name
SNDJFN: BLOCK 1 ;JFN of SENDS.TXT
BYTCNT: BLOCK 1 ;File byte count
NUMSND: BLOCK 1 ;Number of sends to type out
PMPCNT: BLOCK 1 ;AC3 for map and unmap
SAVPDL: BLOCK 1 ;Save ac p for reparse
HOST: BLOCK 2 ;Temporary storage for host location
USRBRK: USRB0. ;Break mask for user name
USRB1.
USRB2.
USRB3.
HSTBRK: BRMSK. (USRB0.,USRB1.,USRB2.,USRB3.,,<<*>,<$>,<_>>)
;CMDBLK - command state block
CMDBLK: 0,,CMRPRS ;.CMFLG - flags
.PRIIN,,.NULIO ;.CMIOJ - input/output JFNs
-1,,[ASCIZ//] ;.CMRTY - prompt
-1,,CMDBUF ;.CMBFP - start of text buffer
-1,,CMDBUF ;.CMPTR - next input to be parsed
CMDBSZ*5-1 ;.CMCNT - count of space left in buffer
0 ;.CMINC - chars left in buffer
-1,,ATMBUF ;.CMABP - pointer to atom buffer
ATMBSZ*5-1 ;.CMABC - size of atom buffer
GTJBLK ;.CMGJB - address of GTJFN block
SUBTTL Macros
;DLDB - decrement and load byte pointer
DEFINE DLDB (AC,PTR) <
MOVNI AC,1 ;;Decrement byte pointer by one
ADJBP AC,PTR
MOVEM AC,PTR ;;Update pointer
LDB AC,PTR ;;Get the byte
>
;EMSG - print an error message and shut us down
DEFINE EMSG (STRING) <
HRROI A,[ASCIZ\STRING\] ;;Prepare the message
ESOUT% ;;Do everything needed
JRST STOP ;;Now quit
>
SUBTTL Main loop
START: RESET% ;Initialize the world
MOVE P,[IOWD PDLEN,PDLIST] ;Set up the control stack
SETZM USERNM ;No user yet
MOVEI A,1
MOVEM A,NUMSND ;Initial number of messages to type
CALL FILE ;Go look for the sends.txt file
CALL GETJCL ;Get any arguments from rscan buffer
CALL PRINT ;Print the sends
SETO A, ;Mapping from null
MOVE B,[.FHSLF,,SNDPAG] ;To where we mapped SENDS.TXT
MOVE C,PMPCNT ;Number of pages to unmap
TXO C,PM%CNT ;Multiple page unmap
PMAP% ;Unmap the file
MOVE A,SNDJFN ;Get JFN on sends file
CLOSF% ;Close the file
NOP ;Ignore an error here
JRST STOP
SUBTTL PRINT - Print messages
PRINT: MOVE A,[POINT 7,SNDADR] ;A is pointer into file
MOVE PT,BYTCNT ;Get how many bytes in file
ADJBP PT,A ;Point to end of file, pointer now in pt
CALL CKCRLF ;See how many crlf's at end of file
SKIPE B,NUMSND ;0 meaning all?
IFSKP.
SKIPN USERNM ;Want a user?
IFSKP.
MOVE PT,[POINT 7,SNDADR] ;Yes, point to start of file
JRST PRTU4 ;Location to print all from a certain user
ENDIF.
MOVEI B,3 ;Skipping over delimiter and first CRLF
ADJBP B,A ;Copy to appropriate register
MOVE CT,BYTCNT ;With entire byte count of file
SUBI CT,2 ;Except those chars we just forgot
ELSE.
MOVE LP,BYTCNT ;Less than whole file, calculate how much
MOVE CT,NUMSND
SKIPG CT ;Is it positive?
MOVNS CT ;No, make it so
SKIPE USERNM ;If it's a non-zero user number
JRST PRTUSR ;Print with user name in mind
SKIPG NUMSND ;Want only one send?
JRST ONESND ;Yes, go do it
DO.
DLDB B,PT ;Decrement the byte pointer
CAIN B,.CHESC ;Delimiter?
SOJE CT,ENDLP. ;Yes, decrement number of messages
SOJG LP,TOP. ;Keep looping
IBP PT ;On the other hand, print whole file, slurp esc
ENDDO.
MOVEI B,2 ;Skipping over initial CRLF
ADJBP B,PT ;Get pointer to start of messages to print
MOVE CT,BYTCNT ;Get byte count of file
SUBI CT,(LP) ;Get number chars to print
ENDIF.
;; Here with CT/number of bytes to type, B/pointer to file
;; Print sends until end of file
DO.
HRROI A,CMDBUF ;Into a long buffer
MOVE C,CT ;With count
CAILE C,CMDBSZ*5-1 ;Will it fit?
MOVEI C,CMDBSZ*5-1 ;No, get what will
SUBI CT,(C) ;Account for it in main count
MOVEI D,.CHESC ;Ending on terminator
SOUT% ;Copy some SENDS.TXT
ADDI CT,(C) ;Add back in chars we didn't get
JUMPE CT,OUTBUF ;If no more chars, done
LDB C,A ;Get what we finished with
CAIN C,.CHESC ;Escape?
IFSKP.
CALL OUTBUF ;Print out the buffer we got
LOOP. ;Back for more
ENDIF.
SETZ C, ;Get a null
DPB C,A ;Drop it in over the escape
CALL OUTBUF ;Print out the buffer we got
TMSG <-------> ;Type divider
LOOP. ;Back for more
ENDDO.
OUTBUF: HRROI A,CMDBUF ;Point to command buffer
PSOUT% ;Type it out
RET ;That's all
; CKCRLF - check for a newline at the end of SENDS.TXT
CKCRLF: MOVE B,PT ;Start at end of file
LDB C,B ;Get last char
CAIN C,.CHCRT ;If not CR
IFSKP.
CAIE C,.CHLFD ;If a linefeed
IFSKP.
DLDB C,B ;Get second-to-last
CAIN C,.CHCRT ;If carriage return
RET ;Have newline, done
ENDIF.
MOVEI C,.CHCRT ;Get carriage return
IDPB C,PT ;Drop it in
AOS BYTCNT ;One more byte
ENDIF.
MOVEI C,.CHLFD ;Now a linefeed
IDPB C,PT ;Finish string
AOS BYTCNT ;One more byte
RET
; PRTUSR - print given the user name
; Takes PT/ pointer to end of SENDS.TXT
; LP/ number of bytes in SENDS.TXT
; CT/ number of sends to print
PRTUSR: DLDB B,PT
CAIE B,.CHESC ;Delimiter?
IFSKP.
MOVEI B,2 ;Skip over delimiter, CRLF
ADJBP B,PT ;Increment the pointer
MOVE A,[POINT 7,USERNM] ;Get a pointer to the username
CALL MATCH ;Do we have a match?
CAIA ;Nope, sorry
SOJE CT,PRTU1 ;Jump straight to display
ENDIF.
SOJGE LP,PRTUSR ;Let's go for some more
IBP PT ;if get here, need to advance pointer extra
; Here we are either at beginning of the file or at the beginning of the nth
; most recent send from a given user
PRTU4: IBP PT ;Increment pointer
PRTU1: IBP PT ;Point beyond initial delimiter
SETO E, ;Nothing typed out yet
PRTU2: LDB B,PT ;Get the next byte
JUMPE B,R ;Null byte means we're done
IBP PT ;Increment it to flush CRLF
MOVE B,PT ;Get pointer to the user name
MOVE A,[POINT 7,USERNM] ;Get pointer to string we wanna match
CALL MATCH ;Try it
JRST PRTU3 ;We lose, oh well
MOVE A,PT ;Get current pointer
LDB B,PT ;Get the first character again
SETZ C, ;No chars yet
DO.
SOS C ;Decrement once for count
CAIN B,.CHESC ;Delimiter?
IFSKP.
ILDB B,PT ;No, get the next byte
JUMPN B,TOP. ;Loop again if not null
CALL DASH ;Make sure we have dashes
PSOUT% ;That's all, type it out
RET
ENDIF.
ENDDO.
IBP PT ;Delimiter, point past it
CALL DASH ;Make sure we have dashes
MOVE B,A ;Get pointer to beginning
MOVEI A,.PRIOU ;To the terminal
SOUT% ;Output it
SKIPL NUMSND ;Want only one send?
JRST PRTU2 ;No, get next send
RET
PRTU3: ILDB B,PT ;Get the next byte
CAIE B,.CHESC ;Is it a delimiter?
IFSKP.
IBP PT ;Yes, point past it
JRST PRTU2 ;Go on to the next
ENDIF.
JUMPN B,PRTU3 ;Go get more if not null
RET
; DASH - Make sure a dashed line separates two sends
DASH: AOJE E,R ;Count sends. If this is first, nothing more
SAVEAC <A> ;Don't mung caller's registers
TMSG <-----
> ;Else make dashed line
RET
; MATCH - match strings pointed to in A with B
; valid if all chars match (case independent) and the string in B ends with ","
; returns +1 if no match, +2 if match
MATCH: ILDB C,A ;Get char from A
IFE. C ;If null, almost done
ILDB C,B ;Get char from SENDS.TXT
CAIE C,"," ;Is it a comma?
CAIN C," " ;Or space?
RETSKP ;Yes, win
RET
ENDIF.
CALL UPCASE ;Make it uppercase
MOVEM C,D ;Save it away
ILDB C,B ;Get char from SENDS.TXT
CALL UPCASE ;Uppercaseify it, too
CAME C,D ;Do the two match?
RET ;No, fail
JRST MATCH ;Yes, back for the next
; UPCASE - uppercasify character in C
UPCASE: CAIL C,"a" ;.LT. "a"?
CAILE C,"z" ;Or .GT. "z"?
SKIPA ;No, don't bother
SUBI C,"a"-"A" ;Make it upper case
RET
; ONESND - display only one send
; Takes PT/ pointer to end of SENDS.TXT
; LP/ number of bytes in SENDS.TXT
; CT/ number of sends to print
ONESND: DLDB B,PT ;Decrement the byte pointer
CAIN B,.CHESC ;Is it a delimiter?
SOJE CT,ONEEX ;Yes, decrement number of messages
SOJN LP,ONESND ;Keep looping
ONEEX: MOVEI A,2 ;Skipping over delimiter, CRLF
ADJBP A,PT ;Get pointer to start of message text
MOVEM A,PT ;Save in pointer too
SETZ C, ;Clear counter (not -1 so we don't type delim)
DO.
ILDB B,PT ;Get a char
JUMPE B,ENDLP. ;If null, done
CAIE B,.CHESC ;Else if not a delimiter
SOJA C,TOP. ;then go back for the next
ENDDO.
MOVE B,A ;Get old pointer
MOVEI A,.PRIOU ;To terminal
SOUT% ;Output it
RET
SUBTTL FILE - Find and read in the SENDS.TXT file
FILE: SETO A, ;A/ -1 = this job
HRROI B,D ;B/-1,,4 = one word, put it in ac 4
MOVEI C,.JILNO ;want job's logged in directory number
GETJI% ;go look it up
ERCAL FATAL ;can't recover from this
MOVE B,D ;get lidno
HRROI A,BUFFER ;A/ pointer to directory name buffer
DIRST% ;Write our directory string
ERCAL FATAL
HRROI B,[ASCIZ/SENDS.TXT/] ;B/ we are looking for this file
SETZ C, ;C/ end on a null
SOUT% ;Add the file spec
IDPB C,A ;Ensure a null at the end
MOVX A,GJ%SHT!GJ%OLD ;A/short form, old file
HRROI B,BUFFER ;B/file spec
GTJFN% ;Get a handle on the file
ERJMP STOP ;Not found, quit quietly
HRRZM A,SNDJFN ;Save JFN
MOVX B,FLD(7,OF%BSZ)!OF%RD ;Text, read access
OPENF% ;Open the file
ERCAL FATAL
SIZEF% ;Get byte count in B
ERCAL FATAL
JUMPE B,STOP ;Empty file, so quit
MOVEM B,BYTCNT ;Save byte count
MOVEM C,PMPCNT ;Save page count
HRLZ A,SNDJFN ;From first page of file
MOVE B,[.FHSLF,,SNDPAG] ;To our address space
TXO C,PM%CNT!PM%RD!PM%CPY ;Multiple page pmap and copy on write
PMAP% ;Map file in
RET
SUBTTL GETJCL - Read any JCL from the RSCAN buffer
GETJCL: CALL DOJCL ;Process JCL
SETZ A, ;Get a null
IDPB A,PT ;Deposit it on end of user string
HRROI A,[ASCIZ//] ;Get null string
RSCAN% ;Flush RSCAN buffer with it
RET
DOJCL: MOVEI A,.RSINI ;A/ function is initialize RSCAN buffer
RSCAN% ;Do so
ERJMP R
JUMPE A,R ;Do nothing if nothing to do it with
DO.
PBIN% ;Get a character
CAIE A,.CHLFD ;End of line?
CAIN A,.CHCRT ;Or a carriage return?
RET
CAIE A,.CHSPC ;Is it a space?
LOOP. ;No, back until we have one
ENDDO.
MOVEI A,CMDBLK ;Command state block
MOVEI B,[FLDDB. .CMINI] ;Initialize it
CALL .COMND
NOP ;Can't fail
MOVEM P,SAVPDL ;Save stack pointer
CMRPRS: MOVE P,SAVPDL ;Get it back on reparse (reparse? with JCL??)
CALL GETNUM ;Get number of sends (must be before GETUSR)
IFSKP.
CALL GETUSR ;Got it, now get who to look for
NOP ;Don't care if not given
ELSE.
CALL GETUSR ;No number, try for user
IFSKP.
CALL GETNUM ;Got that, now try for number again
NOP ;Don't care if not given
ENDIF.
ENDIF.
MOVEI B,[FLDDB. .CMCFM] ;Confirm it
CALL .COMND
IFSKP. <RET>
EMSG <Not confirmed>
.COMND: MOVEI A,CMDBLK ;Get pointer to command block
COMND% ;Parse
TXNE A,CM%NOP ;If not parsed
RET ;Then return +1
RETSKP ;Else +2
; GETUSR - Parse a user name (and host if given)
GETUSR: SETZM USERNM ;No user parsed yet
MOVEI B,[FLDBK. .CMUSR,,,,,USRBRK,[
FLDBK. .CMFLD,CM%SDH,,,,USRBRK]]
CALL .COMND ;Parse user or remote user name
RET ;Not parsed, give up
MOVE PT,[POINT 7,USERNM]
MOVE B,[POINT 7,ATMBUF]
CALL CPYPT ;Copy atom buffer into pointer
MOVX B,CM%XIF ;Turn off meaning of @
IORM B,.CMFLG+CMDBLK
MOVEI B,[FLDDB. .CMTOK,,<-1,,[ASCIZ/@/]>,,,[
FLDDB. .CMTOK,CM%SDH,<-1,,[ASCIZ/@/]>]]
CALL .COMND ;Parse atsign
IFSKP. ;If we had one...
MOVE B,[POINT 7,[ASCIZ/@/]] ;stuff in one of these
CALL CPYPT
MOVEI B,[FLDBK. .CMFLD,CM%SDH,,<host name>,,HSTBRK]
CALL .COMND
IFNSK. <EMSG <Illegal host name>>
MOVE B,[POINT 7,ATMBUF]
CALL CPYPT ;Add in host name too
ENDIF.
MOVX B,CM%XIF ;Turn @ back on
ANDCAM B,.CMFLG+CMDBLK
SETZ B, ;Get a null
IDPB B,PT ;Drop it in
RETSKP
; Copy a string into pointer pointed to by PT
CPYPT: DO.
ILDB C,B ;Get next char
JUMPE C,R ;Finish on null
IDPB C,PT ;Drop it in
LOOP.
ENDDO.
; GETNUM - Parse number of messages to use
GETNUM: MOVEI B,[FLDDB. .CMNUM,,^D10,,,[
FLDDB. .CMTOK,,<-1,,[ASCIZ/*/]>]]
CALL .COMND ;Parse number or star
RET ;Neither, give up
LOAD C,CM%FNC,(C) ;Get which we parsed
CAIE C,.CMTOK ;Star?
IFSKP.
SETZM NUMSND ;Yes, remember so (0 means all)
ELSE.
CAME B,[-1] ;If number is minus one
SKIPN B ;Or zero
MOVEI B,1 ;Then want only 1 msg
MOVEM B,NUMSND ;Say this is how many sends we want
ENDIF.
RETSKP
SUBTTL Error handling
; ERROR - here to print out the last jsys error
ERROR: HRROI A,[ASCIZ//] ;Just print a question mark
ESOUT% ;Clear input buffer, type question mark
MOVEI A,.PRIOU ;A/ output to the TTY
HRLOI B,.FHSLF ;B/ most recent error, this fork
SETZ C, ;C/ no limit
ERSTR% ;Print the error
NOP ;Ignore an error here
NOP
RET
; FATAL - shutdown because of error
; STOP - quiet shutdown
FATAL: CALL ERROR ;Print last JSYS error
STOP: HALTF% ;Shut us down
EMSG <Cannot continue> ;In case we're continued....
END START