3 * Copyright (c) 1991-1994, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "Far below them they saw the white waters pour into a foaming bowl, and
12 * then swirl darkly about a deep oval basin in the rocks, until they found
13 * their way out again through a narrow gate, and flowed away, fuming and
14 * chattering, into calmer and more level reaches."
20 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
30 # ifndef HAS_SHMAT_PROTOTYPE
31 extern Shmat_t shmat _((int, char *, int));
46 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
50 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
55 #if defined(HAS_SOCKET) && !defined(VMS) /* VMS handles sockets via vmsish.h */
56 # include <sys/socket.h>
60 # include <net/errno.h>
66 do_open(gv,name,len,as_raw,rawmode,rawperm,supplied_fp)
74 register IO *io = GvIOn(gv);
75 PerlIO *saveifp = Nullfp;
76 PerlIO *saveofp = Nullfp;
83 forkprocess = 1; /* assume true if no fork */
86 fd = PerlIO_fileno(IoIFP(io));
87 if (IoTYPE(io) == '-')
89 else if (fd <= maxsysfd) {
92 savetype = IoTYPE(io);
95 else if (IoTYPE(io) == '|')
96 result = my_pclose(IoIFP(io));
97 else if (IoIFP(io) != IoOFP(io)) {
99 result = PerlIO_close(IoOFP(io));
100 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
103 result = PerlIO_close(IoIFP(io));
106 result = PerlIO_close(IoIFP(io));
107 if (result == EOF && fd > maxsysfd)
108 PerlIO_printf(PerlIO_stderr(), "Warning: unable to close filehandle %s properly.\n",
110 IoOFP(io) = IoIFP(io) = Nullfp;
114 result = rawmode & 3;
115 IoTYPE(io) = "<>++"[result];
116 writing = (result > 0);
117 fd = open(name, rawmode, rawperm);
121 fp = PerlIO_fdopen(fd, ((result == 0) ? "r"
122 : (result == 1) ? "w"
130 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
133 myname = savepvn(name, len);
136 while (len && isSPACE(name[len-1]))
139 mode[0] = mode[1] = mode[2] = '\0';
141 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
149 for (name++; isSPACE(*name); name++) ;
152 TAINT_PROPER("piped open");
153 if (dowarn && name[strlen(name)-1] == '|')
154 warn("Can't do bidirectional pipe");
155 fp = my_popen(name,"w");
158 else if (*name == '>') {
159 TAINT_PROPER("open");
162 mode[0] = IoTYPE(io) = 'a';
177 if (!*name && supplied_fp)
181 for (; isSPACE(*name); name++) ;
186 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
190 SETERRNO(EINVAL,SS$_IVCHAN);
195 fd = PerlIO_fileno(IoIFP(thatio));
196 if (IoTYPE(thatio) == 's')
204 if (!(fp = PerlIO_fdopen(fd,mode))) {
212 for (; isSPACE(*name); name++) ;
213 if (strEQ(name,"-")) {
214 fp = PerlIO_stdout();
218 fp = PerlIO_open(name,mode);
222 else if (*name == '<') {
224 for (name++; isSPACE(*name); name++) ;
228 if (strEQ(name,"-")) {
233 fp = PerlIO_open(name,mode);
235 else if (name[len-1] == '|') {
237 while (len && isSPACE(name[len-1]))
240 for (; isSPACE(*name); name++) ;
243 TAINT_PROPER("piped open");
244 fp = my_popen(name,"r");
250 for (; isSPACE(*name); name++) ;
251 if (strEQ(name,"-")) {
256 fp = PerlIO_open(name,"r");
260 if (dowarn && IoTYPE(io) == '<' && strchr(name, '\n'))
261 warn(warn_nl, "open");
265 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
266 if (Fstat(PerlIO_fileno(fp),&statbuf) < 0) {
267 (void)PerlIO_close(fp);
270 if (S_ISSOCK(statbuf.st_mode))
271 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
275 !(statbuf.st_mode & S_IFMT)
280 int buflen = sizeof tokenbuf;
281 if (getsockname(PerlIO_fileno(fp), (struct sockaddr *)tokenbuf, &buflen) >= 0
282 || errno != ENOTSOCK)
283 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
284 /* but some return 0 for streams too, sigh */
288 if (saveifp) { /* must use old fp? */
289 fd = PerlIO_fileno(saveifp);
291 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
292 if (saveofp != saveifp) { /* was a socket? */
293 PerlIO_close(saveofp);
298 if (fd != PerlIO_fileno(fp)) {
302 dup2(PerlIO_fileno(fp), fd);
303 sv = *av_fetch(fdpid,PerlIO_fileno(fp),TRUE);
304 (void)SvUPGRADE(sv, SVt_IV);
307 sv = *av_fetch(fdpid,fd,TRUE);
308 (void)SvUPGRADE(sv, SVt_IV);
316 #if defined(HAS_FCNTL) && defined(F_SETFD)
317 fd = PerlIO_fileno(fp);
318 fcntl(fd,F_SETFD,fd > maxsysfd);
322 if (IoTYPE(io) == 's'
323 || (IoTYPE(io) == '>' && S_ISCHR(statbuf.st_mode)) ) {
324 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
338 IoTYPE(io) = savetype;
347 #ifndef FLEXFILENAMES
355 argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
356 if (filemode & (S_ISUID|S_ISGID)) {
357 PerlIO_flush(IoIFP(GvIOn(argvoutgv))); /* chmod must follow last write */
359 (void)fchmod(lastfd,filemode);
361 (void)chmod(oldname,filemode);
365 while (av_len(GvAV(gv)) >= 0) {
367 sv = av_shift(GvAV(gv));
369 sv_setsv(GvSV(gv),sv);
370 SvSETMAGIC(GvSV(gv));
371 oldname = SvPVx(GvSV(gv), len);
372 if (do_open(gv,oldname,len,FALSE,0,0,Nullfp)) {
374 TAINT_PROPER("inplace open");
375 if (strEQ(oldname,"-")) {
376 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
377 return IoIFP(GvIOp(gv));
379 #ifndef FLEXFILENAMES
380 filedev = statbuf.st_dev;
381 fileino = statbuf.st_ino;
383 filemode = statbuf.st_mode;
384 fileuid = statbuf.st_uid;
385 filegid = statbuf.st_gid;
386 if (!S_ISREG(filemode)) {
387 warn("Can't do inplace edit: %s is not a regular file",
394 add_suffix(sv,inplace);
396 sv_catpv(sv,inplace);
398 #ifndef FLEXFILENAMES
399 if (Stat(SvPVX(sv),&statbuf) >= 0
400 && statbuf.st_dev == filedev
401 && statbuf.st_ino == fileino ) {
402 warn("Can't do inplace edit: %s > 14 characters",
410 if (rename(oldname,SvPVX(sv)) < 0) {
411 warn("Can't rename %s to %s: %s, skipping file",
412 oldname, SvPVX(sv), Strerror(errno) );
418 (void)unlink(SvPVX(sv));
419 (void)rename(oldname,SvPVX(sv));
420 do_open(gv,SvPVX(sv),SvCUR(sv),FALSE,0,0,Nullfp);
423 (void)UNLINK(SvPVX(sv));
424 if (link(oldname,SvPVX(sv)) < 0) {
425 warn("Can't rename %s to %s: %s, skipping file",
426 oldname, SvPVX(sv), Strerror(errno) );
430 (void)UNLINK(oldname);
435 # ifndef VMS /* Don't delete; use automatic file versioning */
436 if (UNLINK(oldname) < 0) {
437 warn("Can't rename %s to %s: %s, skipping file",
438 oldname, SvPVX(sv), Strerror(errno) );
444 croak("Can't do inplace edit without backup");
449 sv_catpv(sv,oldname);
450 SETERRNO(0,0); /* in case sprintf set errno */
451 if (!do_open(argvoutgv,SvPVX(sv),SvCUR(sv),FALSE,0,0,Nullfp)) {
452 warn("Can't do inplace edit on %s: %s",
453 oldname, Strerror(errno) );
457 setdefout(argvoutgv);
458 lastfd = PerlIO_fileno(IoIFP(GvIOp(argvoutgv)));
459 (void)Fstat(lastfd,&statbuf);
461 (void)fchmod(lastfd,filemode);
463 (void)chmod(oldname,filemode);
465 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
467 (void)fchown(lastfd,fileuid,filegid);
470 (void)chown(oldname,fileuid,filegid);
475 return IoIFP(GvIOp(gv));
478 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",SvPV(sv, na), Strerror(errno));
481 (void)do_close(argvoutgv,FALSE);
482 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
489 do_pipe(sv, rgv, wgv)
513 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
514 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
515 IoIFP(wstio) = IoOFP(wstio);
518 if (!IoIFP(rstio) || !IoOFP(wstio)) {
519 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
521 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
526 sv_setsv(sv,&sv_yes);
530 sv_setsv(sv,&sv_undef);
535 /* explicit renamed to avoid C++ conflict -- kja */
537 #ifndef CAN_PROTOTYPE
538 do_close(gv,not_implicit)
542 do_close(GV *gv, bool not_implicit)
543 #endif /* CAN_PROTOTYPE */
550 if (!gv || SvTYPE(gv) != SVt_PVGV) {
551 SETERRNO(EBADF,SS$_IVCHAN);
555 if (!io) { /* never opened */
556 if (dowarn && not_implicit)
557 warn("Close on unopened file <%s>",GvENAME(gv));
560 retval = io_close(io);
564 IoLINES_LEFT(io) = IoPAGE_LEN(io);
578 if (IoTYPE(io) == '|') {
579 status = my_pclose(IoIFP(io));
580 retval = (status == 0);
581 statusvalue = FIXSTATUS(status);
583 else if (IoTYPE(io) == '-')
586 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
587 retval = (PerlIO_close(IoOFP(io)) != EOF);
588 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
591 retval = (PerlIO_close(IoIFP(io)) != EOF);
593 IoOFP(io) = IoIFP(io) = Nullfp;
613 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
614 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
615 return FALSE; /* this is the most usual case */
618 ch = PerlIO_getc(IoIFP(io));
620 (void)PerlIO_ungetc(IoIFP(io),ch);
623 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
624 if (PerlIO_get_cnt(IoIFP(io)) < -1)
625 PerlIO_set_cnt(IoIFP(io),-1);
627 if (op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
628 if (!nextargv(argvgv)) /* get another fp handy */
632 return TRUE; /* normal fp, definitely end of file */
647 if (!io || !IoIFP(io))
650 #ifdef ULTRIX_STDIO_BOTCH
651 if (PerlIO_eof(IoIFP(io)))
652 (void)PerlIO_seek (IoIFP(io), 0L, 2); /* ultrix 1.2 workaround */
655 return PerlIO_tell(IoIFP(io));
659 warn("tell() on unopened file");
660 SETERRNO(EBADF,RMS$_IFI);
665 do_seek(gv, pos, whence)
676 if (!io || !IoIFP(io))
679 #ifdef ULTRIX_STDIO_BOTCH
680 if (PerlIO_eof(IoIFP(io)))
681 (void)PerlIO_seek (IoIFP(io), 0L, 2); /* ultrix 1.2 workaround */
684 return PerlIO_seek(IoIFP(io), pos, whence) >= 0;
688 warn("seek() on unopened file");
689 SETERRNO(EBADF,RMS$_IFI);
693 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
694 /* code courtesy of William Kucharski */
697 I32 my_chsize(fd, length)
698 I32 fd; /* file descriptor */
699 Off_t length; /* length to set file to */
705 if (Fstat(fd, &filebuf) < 0)
708 if (filebuf.st_size < length) {
710 /* extend file length */
712 if ((lseek(fd, (length - 1), 0)) < 0)
715 /* write a "0" byte */
717 if ((write(fd, "", 1)) != 1)
721 /* truncate length */
726 fl.l_type = F_WRLCK; /* write lock on file space */
729 * This relies on the UNDOCUMENTED F_FREESP argument to
730 * fcntl(2), which truncates the file so that it ends at the
731 * position indicated by fl.l_start.
733 * Will minor miracles never cease?
736 if (fcntl(fd, F_FREESP, &fl) < 0)
743 #endif /* F_FREESP */
753 /* assuming fp is checked earlier */
759 if (SvIOK(sv) && SvIVX(sv) != 0) {
760 PerlIO_printf(fp, ofmt, (double)SvIVX(sv));
761 return !PerlIO_error(fp);
763 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
764 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
765 PerlIO_printf(fp, ofmt, SvNVX(sv));
766 return !PerlIO_error(fp);
769 switch (SvTYPE(sv)) {
778 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
779 return !PerlIO_error(fp);
783 tmps = SvPV(sv, len);
786 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
788 return !PerlIO_error(fp);
799 if (op->op_flags & OPf_REF) {
801 tmpgv = cGVOP->op_gv;
804 if (io && IoIFP(io)) {
806 sv_setpv(statname,"");
808 return (laststatval = Fstat(PerlIO_fileno(IoIFP(io)), &statcache));
814 warn("Stat on unopened file <%s>",
817 sv_setpv(statname,"");
818 return (laststatval = -1);
824 if (SvTYPE(sv) == SVt_PVGV) {
828 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
829 tmpgv = (GV*)SvRV(sv);
834 sv_setpv(statname,SvPV(sv, na));
836 laststatval = Stat(SvPV(sv, na),&statcache);
837 if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
838 warn(warn_nl, "stat");
849 if (op->op_flags & OPf_REF) {
851 if (cGVOP->op_gv == defgv) {
852 if (laststype != OP_LSTAT)
853 croak("The stat preceding -l _ wasn't an lstat");
856 croak("You can't use -l on a filehandle");
859 laststype = OP_LSTAT;
863 sv_setpv(statname,SvPV(sv, na));
865 laststatval = lstat(SvPV(sv, na),&statcache);
867 laststatval = Stat(SvPV(sv, na),&statcache);
869 if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
870 warn(warn_nl, "lstat");
875 do_aexec(really,mark,sp)
884 New(401,Argv, sp - mark + 1, char*);
886 while (++mark <= sp) {
888 *a++ = SvPVx(*mark, na);
893 if (*Argv[0] != '/') /* will execvp use PATH? */
894 TAINT_ENV(); /* testing IFS here is overkill, probably */
895 if (really && *(tmps = SvPV(really, na)))
898 execvp(Argv[0],Argv);
900 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
911 Argv = Null(char **);
929 while (*cmd && isSPACE(*cmd))
932 /* save an extra exec if possible */
935 if (strnEQ(cmd,cshname,cshlen) && strnEQ(cmd+cshlen," -c",3)) {
953 execl(cshname,"csh", flags,ncmd,(char*)0);
961 /* see if there are shell metacharacters in it */
963 if (*cmd == '.' && isSPACE(cmd[1]))
966 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
969 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
973 for (s = cmd; *s; s++) {
974 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
975 if (*s == '\n' && !s[1]) {
980 execl(sh_path, "sh", "-c", cmd, (char*)0);
985 New(402,Argv, (s - cmd) / 2 + 2, char*);
986 Cmd = savepvn(cmd, s-cmd);
989 while (*s && isSPACE(*s)) s++;
992 while (*s && !isSPACE(*s)) s++;
998 execvp(Argv[0],Argv);
999 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1004 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
1020 register I32 tot = 0;
1022 SV **oldmark = mark;
1025 while (++mark <= sp) {
1026 if (SvTAINTED(*mark)) {
1035 TAINT_PROPER("chmod");
1039 while (++mark <= sp) {
1040 if (chmod(SvPVx(*mark, na),val))
1047 TAINT_PROPER("chown");
1048 if (sp - mark > 2) {
1049 val = SvIVx(*++mark);
1050 val2 = SvIVx(*++mark);
1052 while (++mark <= sp) {
1053 if (chown(SvPVx(*mark, na),val,val2))
1061 TAINT_PROPER("kill");
1064 s = SvPVx(*++mark, na);
1067 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1069 if (!(val = whichsig(s)))
1070 croak("Unrecognized signal name \"%s\"",s);
1075 /* kill() doesn't do process groups (job trees?) under VMS */
1076 if (val < 0) val = -val;
1077 if (val == SIGKILL) {
1078 # include <starlet.h>
1079 /* Use native sys$delprc() to insure that target process is
1080 * deleted; supervisor-mode images don't pay attention to
1081 * CRTL's emulation of Unix-style signals and kill()
1083 while (++mark <= sp) {
1084 I32 proc = SvIVx(*mark);
1085 register unsigned long int __vmssts;
1086 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1090 case SS$_NOSUCHNODE:
1091 SETERRNO(ESRCH,__vmssts);
1094 SETERRNO(EPERM,__vmssts);
1097 SETERRNO(EVMSERR,__vmssts);
1106 while (++mark <= sp) {
1107 I32 proc = SvIVx(*mark);
1109 if (killpg(proc,val)) /* BSD */
1111 if (kill(-proc,val)) /* SYSV */
1117 while (++mark <= sp) {
1118 if (kill(SvIVx(*mark),val))
1125 TAINT_PROPER("unlink");
1127 while (++mark <= sp) {
1128 s = SvPVx(*mark, na);
1129 if (euid || unsafe) {
1133 else { /* don't let root wipe out directories without -U */
1135 if (lstat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1137 if (Stat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1149 TAINT_PROPER("utime");
1150 if (sp - mark > 2) {
1151 #if defined(I_UTIME) || defined(VMS)
1152 struct utimbuf utbuf;
1160 Zero(&utbuf, sizeof utbuf, char);
1162 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1163 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1165 utbuf.actime = SvIVx(*++mark); /* time accessed */
1166 utbuf.modtime = SvIVx(*++mark); /* time modified */
1169 while (++mark <= sp) {
1170 if (utime(SvPVx(*mark, na),&utbuf))
1182 /* Do the permissions allow some operation? Assumes statcache already set. */
1183 #ifndef VMS /* VMS' cando is in vms.c */
1185 cando(bit, effective, statbufp)
1188 register struct stat *statbufp;
1191 /* [Comments and code from Len Reed]
1192 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1193 * to write-protected files. The execute permission bit is set
1194 * by the Miscrosoft C library stat() function for the following:
1199 * All files and directories are readable.
1200 * Directories and special files, e.g. "CON", cannot be
1202 * [Comment by Tom Dinger -- a directory can have the write-protect
1203 * bit set in the file system, but DOS permits changes to
1204 * the directory anyway. In addition, all bets are off
1205 * here for networked software, such as Novell and
1209 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1210 * too so it will actually look into the files for magic numbers
1212 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1214 #else /* ! DOSISH */
1215 if ((effective ? euid : uid) == 0) { /* root is special */
1216 if (bit == S_IXUSR) {
1217 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1221 return TRUE; /* root reads and writes anything */
1224 if (statbufp->st_uid == (effective ? euid : uid) ) {
1225 if (statbufp->st_mode & bit)
1226 return TRUE; /* ok as "user" */
1228 else if (ingroup((I32)statbufp->st_gid,effective)) {
1229 if (statbufp->st_mode & bit >> 3)
1230 return TRUE; /* ok as "group" */
1232 else if (statbufp->st_mode & bit >> 6)
1233 return TRUE; /* ok as "other" */
1235 #endif /* ! DOSISH */
1240 ingroup(testgid,effective)
1244 if (testgid == (effective ? egid : gid))
1246 #ifdef HAS_GETGROUPS
1251 Groups_t gary[NGROUPS];
1254 anum = getgroups(NGROUPS,gary);
1256 if (gary[anum] == testgid)
1263 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1266 do_ipcget(optype, mark, sp)
1274 key = (key_t)SvNVx(*++mark);
1275 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1276 flags = SvIVx(*++mark);
1282 return msgget(key, flags);
1286 return semget(key, n, flags);
1290 return shmget(key, n, flags);
1292 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1294 croak("%s not implemented", op_desc[optype]);
1297 return -1; /* should never happen */
1301 do_ipcctl(optype, mark, sp)
1308 I32 id, n, cmd, infosize, getinfo;
1311 id = SvIVx(*++mark);
1312 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1313 cmd = SvIVx(*++mark);
1316 getinfo = (cmd == IPC_STAT);
1322 if (cmd == IPC_STAT || cmd == IPC_SET)
1323 infosize = sizeof(struct msqid_ds);
1328 if (cmd == IPC_STAT || cmd == IPC_SET)
1329 infosize = sizeof(struct shmid_ds);
1334 if (cmd == IPC_STAT || cmd == IPC_SET)
1335 infosize = sizeof(struct semid_ds);
1336 else if (cmd == GETALL || cmd == SETALL)
1338 struct semid_ds semds;
1339 if (semctl(id, 0, IPC_STAT, &semds) == -1)
1341 getinfo = (cmd == GETALL);
1342 infosize = semds.sem_nsems * sizeof(short);
1343 /* "short" is technically wrong but much more portable
1344 than guessing about u_?short(_t)? */
1348 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1350 croak("%s not implemented", op_desc[optype]);
1359 SvPV_force(astr, len);
1360 a = SvGROW(astr, infosize+1);
1364 a = SvPV(astr, len);
1365 if (len != infosize)
1366 croak("Bad arg length for %s, is %d, should be %d",
1367 op_desc[optype], len, infosize);
1373 a = (char *)i; /* ouch */
1380 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1385 ret = semctl(id, n, cmd, (struct semid_ds *)a);
1390 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1394 if (getinfo && ret >= 0) {
1395 SvCUR_set(astr, infosize);
1396 *SvEND(astr) = '\0';
1410 I32 id, msize, flags;
1413 id = SvIVx(*++mark);
1415 flags = SvIVx(*++mark);
1416 mbuf = SvPV(mstr, len);
1417 if ((msize = len - sizeof(long)) < 0)
1418 croak("Arg too short for msgsnd");
1420 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1422 croak("msgsnd not implemented");
1435 I32 id, msize, flags, ret;
1438 id = SvIVx(*++mark);
1440 msize = SvIVx(*++mark);
1441 mtype = (long)SvIVx(*++mark);
1442 flags = SvIVx(*++mark);
1443 if (SvTHINKFIRST(mstr)) {
1444 if (SvREADONLY(mstr))
1445 croak("Can't msgrcv to readonly var");
1449 SvPV_force(mstr, len);
1450 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1453 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1455 SvCUR_set(mstr, sizeof(long)+ret);
1456 *SvEND(mstr) = '\0';
1460 croak("msgrcv not implemented");
1475 id = SvIVx(*++mark);
1477 opbuf = SvPV(opstr, opsize);
1478 if (opsize < sizeof(struct sembuf)
1479 || (opsize % sizeof(struct sembuf)) != 0) {
1480 SETERRNO(EINVAL,LIB$_INVARG);
1484 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1486 croak("semop not implemented");
1491 do_shmio(optype, mark, sp)
1499 I32 id, mpos, msize;
1501 struct shmid_ds shmds;
1503 id = SvIVx(*++mark);
1505 mpos = SvIVx(*++mark);
1506 msize = SvIVx(*++mark);
1508 if (shmctl(id, IPC_STAT, &shmds) == -1)
1510 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1511 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1514 shm = (Shmat_t)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1515 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1517 if (optype == OP_SHMREAD) {
1518 SvPV_force(mstr, len);
1519 mbuf = SvGROW(mstr, msize+1);
1521 Copy(shm + mpos, mbuf, msize, char);
1522 SvCUR_set(mstr, msize);
1523 *SvEND(mstr) = '\0';
1529 mbuf = SvPV(mstr, len);
1530 if ((n = len) > msize)
1532 Copy(mbuf, shm + mpos, n, char);
1534 memzero(shm + mpos + n, msize - n);
1538 croak("shm I/O not implemented");
1542 #endif /* SYSV IPC */