.title exttrnlnm ; Copyright (c) 1994 Glenn C. Everhart ; All Rights Reserved ; ; Author : Arne Vajhøj ; Modified by Glenn C. Everhart ; ; Programmed : july 1992 by Arne Vajhøj ; ; Purpose : translate logical for another process ; .library "sys$library:lib" .link "sys$system:sys.stb"/selective_search $SFDEF $IPLDEF $ACBDEF $DYNDEF $PCBDEF $PRIDEF $PSLDEF $SSDEF $LNMSTRDEF EFN=17 LNM$C_NAMLENGTH=255 .psect EXTTRNLNM quad,pic,con,lcl,noshr,exe,wrt pid: .blkl 1 prcnam: .blkl 1 stat: .blkl 1 .blkl 1 .blkb LNM$C_NAMLENGTH ; ; Entry : EXTTRNLNM ( PID, PRCNAM , LNM , TBLNM , RESSTR , RESLEN ) ; ; Functionality : Translates a logical in the context of another process. ; Particular usefull for translating logicals in ; another users LNM$PROCESS_TABLE. ; ; Notes : Both LNM and TBLNM are case-sensitive (they should normally ; be specified in upper-case). ; ; The translation are being performed in user-mode, that is ; logicals in less priviliged modes overides logicals in more ; priviliged modes. ; ; Arguments : PID ; pid of target process ; longword passed by reference ; readonly ; ; PRCNAM ; process name of target process ; fixed length chracter string passed by descriptor ; readonly ; ; LNM ; logical name to translate ; fixed length chracter string passed by descriptor ; readonly ; ; TBLNM ; logical name table name to lokkup in ; fixed length chracter string passed by descriptor ; readonly ; ; RESSTR ; resultant string ; fixed length chracter string passed by descriptor ; writeonly ; ; RESLEN ; resultant string length ; longword passed by reference ; writeonly ; ; Priviliges required : CMKRNL to enter kernel mode ; WORLD to translate from pid/prcnam to pcb for ; an arbitrary process ; ; Return codes : SS$_NORMAL translation succesfull ; SS$_NOPRIV no CMKRNL privilige present/ ; no access to logical name table ; SS$_NOLOGNAM no such logical name found in table/ ; no such table ; SS$_NONEXPR no such process ; SS$_REMOTE_PROC process not on this node in ; cluster ; ; Disclaimer : This is a kernel-mode-hack using several undocumented ; features of VMS. I truly believe, that it will work ; on any VMS 5.x system, but you use this code entirely at ; your own risk. ; ; Ackknowledge : Thanks to Hunter Goatley for providing much help and ; guiding. ; ; Bugs : Please mail bug-reports to ARNE@KO.HHS.DK (Arne Vajhøj). ; .entry exttrnlnm,^m movl 12(ap),r1 movzwl (r1),lnmstrlen movc3 lnmstrlen,@4(r1),lnmstr movl 16(ap),r1 movzwl (r1),tblstrlen movc3 tblstrlen,@4(r1),tblstr ; pushab qkast_end pushab qkast_start pushl #0 pushl #0 pushab 8(sp) calls #3,G^SYS$LKWSET ; lock pages in working-set blbc r0,101$ ; movl 4(ap),pid movl 8(ap),prcnam ; pushl #0 pushab qkast calls #2,G^SYS$CMKRNL ; call qkast in kernel mode blbc r0,100$ ; pushl #EFN calls #1,G^SYS$WAITFR ; wait for eventflag to be set movl stat,r0 ; test status from LNM$SERCH_ONE blbc r0,100$ ; movl stat+4,@24(ap) movl 20(ap),r1 movc3 stat+4,stat+8,@4(r1) movl #SS$_NORMAL,r0 ; 100$: movl r0,r8 pushab qkast_end pushab qkast_start pushl #0 pushl #0 pushab 8(sp) ; ensure we don't leave the range locked all the time. calls #3,g^sys$ulwset ;unlock working set movl r8,r0 ret 101$: ret qkast_start: .entry qkast,^m movab G^EXE$SIGTORET,SF$A_HANDLER(fp) ; set exception handler movl r4,pcb ; save pcb movab stat,adr ; save address pushl prcnam pushl pid pushl #2 movl sp,ap jsb G^EXE$NAMPID ; convert external->internal PID addl2 #12,sp blbs r0,100$ brw err 100$: UNLOCK SCHED,newipl=#IPL$_ASTDEL cmpl r1,G^SCH$GL_SWPPID ; test if swapper bneq 200$ movl #SS$_NONEXPR,r0 brw err 200$: addl3 #kast_size,#ACB$K_LENGTH,r1 jsb G^EXE$ALONONPAGED ; allocate ACB blbs r0,300$ brw err 300$: movw r1,ACB$W_SIZE(r2) ; fill ACB fields movb #DYN$C_ACB,ACB$B_TYPE(r2) movb #ACB$M_KAST!PSL$C_KERNEL,ACB$B_RMOD(r2) movl PCB$L_PID(r4),ACB$L_PID(r2) movab ACB$K_LENGTH(r2),ACB$L_KAST(r2) pushl r2 movc3 #kast_size,kast_code,ACB$K_LENGTH(r2) ; move AST code popl r2 pushr #^m movl #EFN,r3 movl pcb,r4 jsb G^SCH$CLREF ; clear event-flag popr #^m movl r2,r5 movl #PRI$_TICOM,r2 jsb G^SCH$QAST ; queue AST SETIPL #0 ; reset IPL movl #SS$_NORMAL,r0 ; ok ret ; return err: SETIPL #0 ; reset IPL ret ; return kast_code: pushr #^m movl lnmstrlen,r0 movab lnmstr,r1 movl tblstrlen,r2 movab tblstr,r3 movl #PSL$C_USER,r5 movab outbuf,r6 jsb G^LNM$SEARCH_ONE ; search for logical popr #^m movl r0,retcod ; movl pcb,r4 movl PCB$L_PID(r4),ACB$L_PID(r5) addl2 #kast_code_size,ACB$L_KAST(r5) movb #ACB$M_KAST!PSL$C_KERNEL,ACB$B_RMOD(r5) movl #0,r2 jmp G^SCH$QAST ; requeue AST ; kast_code_size=.-kast_code kast_code_2: pushr #^m movl adr,r1 movl retcod,(r1) blbc retcod,100$ cvtbl outbuf+LNMX$T_XLATION,4(r1) movc3 4(r1),outbuf+LNMX$T_XLATION+1,8(r1) ; save translation 100$: popr #^m ; movl PCB$L_PID(r4),r1 movl #0,r2 movl #EFN,r3 jsb G^SCH$POSTEF ; set event-flag movl r5,r0 jmp G^EXE$DEANONPAGED ; deallocate ACB and disappear ; pcb: .blkl 1 adr: .blkl 1 retcod: .blkl 1 lnmstrlen: .blkl 1 lnmstr: .blkb 32 tblstrlen: .blkl 1 tblstr: .blkb 32 outbuf: .blkb LNMX$T_XLATION+LNM$C_NAMLENGTH kast_size=.-kast_code qkast_end: .end