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);
125 else if (rawmode & O_APPEND)
126 fpmode = (result == 1) ? "a" : "a+";
129 fpmode = (result == 1) ? "w" : "r+";
130 fp = PerlIO_fdopen(fd, fpmode);
137 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
140 myname = savepvn(name, len);
143 while (len && isSPACE(name[len-1]))
146 mode[0] = mode[1] = mode[2] = '\0';
148 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
156 for (name++; isSPACE(*name); name++) ;
159 TAINT_PROPER("piped open");
160 if (dowarn && name[strlen(name)-1] == '|')
161 warn("Can't do bidirectional pipe");
162 fp = my_popen(name,"w");
165 else if (*name == '>') {
166 TAINT_PROPER("open");
169 mode[0] = IoTYPE(io) = 'a';
184 if (!*name && supplied_fp)
188 for (; isSPACE(*name); name++) ;
193 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
197 SETERRNO(EINVAL,SS$_IVCHAN);
202 fd = PerlIO_fileno(IoIFP(thatio));
203 if (IoTYPE(thatio) == 's')
211 if (!(fp = PerlIO_fdopen(fd,mode))) {
219 for (; isSPACE(*name); name++) ;
220 if (strEQ(name,"-")) {
221 fp = PerlIO_stdout();
225 fp = PerlIO_open(name,mode);
229 else if (*name == '<') {
231 for (name++; isSPACE(*name); name++) ;
235 if (strEQ(name,"-")) {
240 fp = PerlIO_open(name,mode);
242 else if (name[len-1] == '|') {
244 while (len && isSPACE(name[len-1]))
247 for (; isSPACE(*name); name++) ;
250 TAINT_PROPER("piped open");
251 fp = my_popen(name,"r");
257 for (; isSPACE(*name); name++) ;
258 if (strEQ(name,"-")) {
263 fp = PerlIO_open(name,"r");
267 if (dowarn && IoTYPE(io) == '<' && strchr(name, '\n'))
268 warn(warn_nl, "open");
272 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
273 if (Fstat(PerlIO_fileno(fp),&statbuf) < 0) {
274 (void)PerlIO_close(fp);
277 if (S_ISSOCK(statbuf.st_mode))
278 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
282 !(statbuf.st_mode & S_IFMT)
287 int buflen = sizeof tokenbuf;
288 if (getsockname(PerlIO_fileno(fp), (struct sockaddr *)tokenbuf, &buflen) >= 0
289 || errno != ENOTSOCK)
290 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
291 /* but some return 0 for streams too, sigh */
295 if (saveifp) { /* must use old fp? */
296 fd = PerlIO_fileno(saveifp);
298 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
299 if (saveofp != saveifp) { /* was a socket? */
300 PerlIO_close(saveofp);
305 if (fd != PerlIO_fileno(fp)) {
309 dup2(PerlIO_fileno(fp), fd);
310 sv = *av_fetch(fdpid,PerlIO_fileno(fp),TRUE);
311 (void)SvUPGRADE(sv, SVt_IV);
314 sv = *av_fetch(fdpid,fd,TRUE);
315 (void)SvUPGRADE(sv, SVt_IV);
323 #if defined(HAS_FCNTL) && defined(F_SETFD)
324 fd = PerlIO_fileno(fp);
325 fcntl(fd,F_SETFD,fd > maxsysfd);
329 if (IoTYPE(io) == 's'
330 || (IoTYPE(io) == '>' && S_ISCHR(statbuf.st_mode)) ) {
331 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
345 IoTYPE(io) = savetype;
354 #ifndef FLEXFILENAMES
362 argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
363 if (filemode & (S_ISUID|S_ISGID)) {
364 PerlIO_flush(IoIFP(GvIOn(argvoutgv))); /* chmod must follow last write */
366 (void)fchmod(lastfd,filemode);
368 (void)chmod(oldname,filemode);
372 while (av_len(GvAV(gv)) >= 0) {
374 sv = av_shift(GvAV(gv));
376 sv_setsv(GvSV(gv),sv);
377 SvSETMAGIC(GvSV(gv));
378 oldname = SvPVx(GvSV(gv), len);
379 if (do_open(gv,oldname,len,FALSE,0,0,Nullfp)) {
381 TAINT_PROPER("inplace open");
382 if (strEQ(oldname,"-")) {
383 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
384 return IoIFP(GvIOp(gv));
386 #ifndef FLEXFILENAMES
387 filedev = statbuf.st_dev;
388 fileino = statbuf.st_ino;
390 filemode = statbuf.st_mode;
391 fileuid = statbuf.st_uid;
392 filegid = statbuf.st_gid;
393 if (!S_ISREG(filemode)) {
394 warn("Can't do inplace edit: %s is not a regular file",
401 add_suffix(sv,inplace);
403 sv_catpv(sv,inplace);
405 #ifndef FLEXFILENAMES
406 if (Stat(SvPVX(sv),&statbuf) >= 0
407 && statbuf.st_dev == filedev
408 && statbuf.st_ino == fileino ) {
409 warn("Can't do inplace edit: %s > 14 characters",
417 if (rename(oldname,SvPVX(sv)) < 0) {
418 warn("Can't rename %s to %s: %s, skipping file",
419 oldname, SvPVX(sv), Strerror(errno) );
425 (void)unlink(SvPVX(sv));
426 (void)rename(oldname,SvPVX(sv));
427 do_open(gv,SvPVX(sv),SvCUR(sv),FALSE,0,0,Nullfp);
430 (void)UNLINK(SvPVX(sv));
431 if (link(oldname,SvPVX(sv)) < 0) {
432 warn("Can't rename %s to %s: %s, skipping file",
433 oldname, SvPVX(sv), Strerror(errno) );
437 (void)UNLINK(oldname);
441 #if !defined(DOSISH) && !defined(AMIGAOS)
442 # ifndef VMS /* Don't delete; use automatic file versioning */
443 if (UNLINK(oldname) < 0) {
444 warn("Can't rename %s to %s: %s, skipping file",
445 oldname, SvPVX(sv), Strerror(errno) );
451 croak("Can't do inplace edit without backup");
456 sv_catpv(sv,oldname);
457 SETERRNO(0,0); /* in case sprintf set errno */
458 if (!do_open(argvoutgv,SvPVX(sv),SvCUR(sv),FALSE,0,0,Nullfp)) {
459 warn("Can't do inplace edit on %s: %s",
460 oldname, Strerror(errno) );
464 setdefout(argvoutgv);
465 lastfd = PerlIO_fileno(IoIFP(GvIOp(argvoutgv)));
466 (void)Fstat(lastfd,&statbuf);
468 (void)fchmod(lastfd,filemode);
470 (void)chmod(oldname,filemode);
472 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
474 (void)fchown(lastfd,fileuid,filegid);
477 (void)chown(oldname,fileuid,filegid);
482 return IoIFP(GvIOp(gv));
485 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",SvPV(sv, na), Strerror(errno));
488 (void)do_close(argvoutgv,FALSE);
489 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
496 do_pipe(sv, rgv, wgv)
520 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
521 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
522 IoIFP(wstio) = IoOFP(wstio);
525 if (!IoIFP(rstio) || !IoOFP(wstio)) {
526 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
528 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
533 sv_setsv(sv,&sv_yes);
537 sv_setsv(sv,&sv_undef);
542 /* explicit renamed to avoid C++ conflict -- kja */
544 #ifndef CAN_PROTOTYPE
545 do_close(gv,not_implicit)
549 do_close(GV *gv, bool not_implicit)
550 #endif /* CAN_PROTOTYPE */
557 if (!gv || SvTYPE(gv) != SVt_PVGV) {
558 SETERRNO(EBADF,SS$_IVCHAN);
562 if (!io) { /* never opened */
563 if (dowarn && not_implicit)
564 warn("Close on unopened file <%s>",GvENAME(gv));
567 retval = io_close(io);
571 IoLINES_LEFT(io) = IoPAGE_LEN(io);
585 if (IoTYPE(io) == '|') {
586 status = my_pclose(IoIFP(io));
587 retval = (status == 0);
588 STATUS_NATIVE_SET(status);
590 else if (IoTYPE(io) == '-')
593 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
594 retval = (PerlIO_close(IoOFP(io)) != EOF);
595 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
598 retval = (PerlIO_close(IoIFP(io)) != EOF);
600 IoOFP(io) = IoIFP(io) = Nullfp;
620 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
621 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
622 return FALSE; /* this is the most usual case */
625 ch = PerlIO_getc(IoIFP(io));
627 (void)PerlIO_ungetc(IoIFP(io),ch);
630 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
631 if (PerlIO_get_cnt(IoIFP(io)) < -1)
632 PerlIO_set_cnt(IoIFP(io),-1);
634 if (op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
635 if (!nextargv(argvgv)) /* get another fp handy */
639 return TRUE; /* normal fp, definitely end of file */
654 if (!io || !IoIFP(io))
657 #ifdef ULTRIX_STDIO_BOTCH
658 if (PerlIO_eof(IoIFP(io)))
659 (void)PerlIO_seek (IoIFP(io), 0L, 2); /* ultrix 1.2 workaround */
662 return PerlIO_tell(IoIFP(io));
666 warn("tell() on unopened file");
667 SETERRNO(EBADF,RMS$_IFI);
672 do_seek(gv, pos, whence)
683 if (!io || !IoIFP(io))
686 #ifdef ULTRIX_STDIO_BOTCH
687 if (PerlIO_eof(IoIFP(io)))
688 (void)PerlIO_seek (IoIFP(io), 0L, 2); /* ultrix 1.2 workaround */
691 return PerlIO_seek(IoIFP(io), pos, whence) >= 0;
695 warn("seek() on unopened file");
696 SETERRNO(EBADF,RMS$_IFI);
700 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
701 /* code courtesy of William Kucharski */
704 I32 my_chsize(fd, length)
705 I32 fd; /* file descriptor */
706 Off_t length; /* length to set file to */
712 if (Fstat(fd, &filebuf) < 0)
715 if (filebuf.st_size < length) {
717 /* extend file length */
719 if ((lseek(fd, (length - 1), 0)) < 0)
722 /* write a "0" byte */
724 if ((write(fd, "", 1)) != 1)
728 /* truncate length */
733 fl.l_type = F_WRLCK; /* write lock on file space */
736 * This relies on the UNDOCUMENTED F_FREESP argument to
737 * fcntl(2), which truncates the file so that it ends at the
738 * position indicated by fl.l_start.
740 * Will minor miracles never cease?
743 if (fcntl(fd, F_FREESP, &fl) < 0)
750 #endif /* F_FREESP */
760 /* assuming fp is checked earlier */
766 if (SvIOK(sv) && SvIVX(sv) != 0) {
767 PerlIO_printf(fp, ofmt, (double)SvIVX(sv));
768 return !PerlIO_error(fp);
770 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
771 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
772 PerlIO_printf(fp, ofmt, SvNVX(sv));
773 return !PerlIO_error(fp);
776 switch (SvTYPE(sv)) {
785 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
786 return !PerlIO_error(fp);
790 tmps = SvPV(sv, len);
793 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
795 return !PerlIO_error(fp);
806 if (op->op_flags & OPf_REF) {
808 tmpgv = cGVOP->op_gv;
811 if (io && IoIFP(io)) {
813 sv_setpv(statname,"");
815 return (laststatval = Fstat(PerlIO_fileno(IoIFP(io)), &statcache));
821 warn("Stat on unopened file <%s>",
824 sv_setpv(statname,"");
825 return (laststatval = -1);
831 if (SvTYPE(sv) == SVt_PVGV) {
835 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
836 tmpgv = (GV*)SvRV(sv);
841 sv_setpv(statname,SvPV(sv, na));
843 laststatval = Stat(SvPV(sv, na),&statcache);
844 if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
845 warn(warn_nl, "stat");
856 if (op->op_flags & OPf_REF) {
858 if (cGVOP->op_gv == defgv) {
859 if (laststype != OP_LSTAT)
860 croak("The stat preceding -l _ wasn't an lstat");
863 croak("You can't use -l on a filehandle");
866 laststype = OP_LSTAT;
870 sv_setpv(statname,SvPV(sv, na));
872 laststatval = lstat(SvPV(sv, na),&statcache);
874 laststatval = Stat(SvPV(sv, na),&statcache);
876 if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
877 warn(warn_nl, "lstat");
882 do_aexec(really,mark,sp)
891 New(401,Argv, sp - mark + 1, char*);
893 while (++mark <= sp) {
895 *a++ = SvPVx(*mark, na);
900 if (*Argv[0] != '/') /* will execvp use PATH? */
901 TAINT_ENV(); /* testing IFS here is overkill, probably */
902 if (really && *(tmps = SvPV(really, na)))
905 execvp(Argv[0],Argv);
907 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
918 Argv = Null(char **);
936 while (*cmd && isSPACE(*cmd))
939 /* save an extra exec if possible */
942 if (strnEQ(cmd,cshname,cshlen) && strnEQ(cmd+cshlen," -c",3)) {
960 execl(cshname,"csh", flags,ncmd,(char*)0);
968 /* see if there are shell metacharacters in it */
970 if (*cmd == '.' && isSPACE(cmd[1]))
973 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
976 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
980 for (s = cmd; *s; s++) {
981 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
982 if (*s == '\n' && !s[1]) {
987 execl(sh_path, "sh", "-c", cmd, (char*)0);
992 New(402,Argv, (s - cmd) / 2 + 2, char*);
993 Cmd = savepvn(cmd, s-cmd);
996 while (*s && isSPACE(*s)) s++;
999 while (*s && !isSPACE(*s)) s++;
1005 execvp(Argv[0],Argv);
1006 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1011 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
1027 register I32 tot = 0;
1029 SV **oldmark = mark;
1032 while (++mark <= sp) {
1033 if (SvTAINTED(*mark)) {
1042 TAINT_PROPER("chmod");
1046 while (++mark <= sp) {
1047 if (chmod(SvPVx(*mark, na),val))
1054 TAINT_PROPER("chown");
1055 if (sp - mark > 2) {
1056 val = SvIVx(*++mark);
1057 val2 = SvIVx(*++mark);
1059 while (++mark <= sp) {
1060 if (chown(SvPVx(*mark, na),val,val2))
1068 TAINT_PROPER("kill");
1071 s = SvPVx(*++mark, na);
1074 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1076 if (!(val = whichsig(s)))
1077 croak("Unrecognized signal name \"%s\"",s);
1082 /* kill() doesn't do process groups (job trees?) under VMS */
1083 if (val < 0) val = -val;
1084 if (val == SIGKILL) {
1085 # include <starlet.h>
1086 /* Use native sys$delprc() to insure that target process is
1087 * deleted; supervisor-mode images don't pay attention to
1088 * CRTL's emulation of Unix-style signals and kill()
1090 while (++mark <= sp) {
1091 I32 proc = SvIVx(*mark);
1092 register unsigned long int __vmssts;
1093 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1097 case SS$_NOSUCHNODE:
1098 SETERRNO(ESRCH,__vmssts);
1101 SETERRNO(EPERM,__vmssts);
1104 SETERRNO(EVMSERR,__vmssts);
1113 while (++mark <= sp) {
1114 I32 proc = SvIVx(*mark);
1116 if (killpg(proc,val)) /* BSD */
1118 if (kill(-proc,val)) /* SYSV */
1124 while (++mark <= sp) {
1125 if (kill(SvIVx(*mark),val))
1132 TAINT_PROPER("unlink");
1134 while (++mark <= sp) {
1135 s = SvPVx(*mark, na);
1136 if (euid || unsafe) {
1140 else { /* don't let root wipe out directories without -U */
1142 if (lstat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1144 if (Stat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1156 TAINT_PROPER("utime");
1157 if (sp - mark > 2) {
1158 #if defined(I_UTIME) || defined(VMS)
1159 struct utimbuf utbuf;
1167 Zero(&utbuf, sizeof utbuf, char);
1169 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1170 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1172 utbuf.actime = SvIVx(*++mark); /* time accessed */
1173 utbuf.modtime = SvIVx(*++mark); /* time modified */
1176 while (++mark <= sp) {
1177 if (utime(SvPVx(*mark, na),&utbuf))
1189 /* Do the permissions allow some operation? Assumes statcache already set. */
1190 #ifndef VMS /* VMS' cando is in vms.c */
1192 cando(bit, effective, statbufp)
1195 register struct stat *statbufp;
1198 /* [Comments and code from Len Reed]
1199 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1200 * to write-protected files. The execute permission bit is set
1201 * by the Miscrosoft C library stat() function for the following:
1206 * All files and directories are readable.
1207 * Directories and special files, e.g. "CON", cannot be
1209 * [Comment by Tom Dinger -- a directory can have the write-protect
1210 * bit set in the file system, but DOS permits changes to
1211 * the directory anyway. In addition, all bets are off
1212 * here for networked software, such as Novell and
1216 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1217 * too so it will actually look into the files for magic numbers
1219 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1221 #else /* ! DOSISH */
1222 if ((effective ? euid : uid) == 0) { /* root is special */
1223 if (bit == S_IXUSR) {
1224 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1228 return TRUE; /* root reads and writes anything */
1231 if (statbufp->st_uid == (effective ? euid : uid) ) {
1232 if (statbufp->st_mode & bit)
1233 return TRUE; /* ok as "user" */
1235 else if (ingroup((I32)statbufp->st_gid,effective)) {
1236 if (statbufp->st_mode & bit >> 3)
1237 return TRUE; /* ok as "group" */
1239 else if (statbufp->st_mode & bit >> 6)
1240 return TRUE; /* ok as "other" */
1242 #endif /* ! DOSISH */
1247 ingroup(testgid,effective)
1251 if (testgid == (effective ? egid : gid))
1253 #ifdef HAS_GETGROUPS
1258 Groups_t gary[NGROUPS];
1261 anum = getgroups(NGROUPS,gary);
1263 if (gary[anum] == testgid)
1270 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1273 do_ipcget(optype, mark, sp)
1281 key = (key_t)SvNVx(*++mark);
1282 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1283 flags = SvIVx(*++mark);
1289 return msgget(key, flags);
1293 return semget(key, n, flags);
1297 return shmget(key, n, flags);
1299 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1301 croak("%s not implemented", op_desc[optype]);
1304 return -1; /* should never happen */
1308 do_ipcctl(optype, mark, sp)
1315 I32 id, n, cmd, infosize, getinfo;
1318 id = SvIVx(*++mark);
1319 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1320 cmd = SvIVx(*++mark);
1323 getinfo = (cmd == IPC_STAT);
1329 if (cmd == IPC_STAT || cmd == IPC_SET)
1330 infosize = sizeof(struct msqid_ds);
1335 if (cmd == IPC_STAT || cmd == IPC_SET)
1336 infosize = sizeof(struct shmid_ds);
1341 if (cmd == IPC_STAT || cmd == IPC_SET)
1342 infosize = sizeof(struct semid_ds);
1343 else if (cmd == GETALL || cmd == SETALL)
1345 struct semid_ds semds;
1346 if (semctl(id, 0, IPC_STAT, &semds) == -1)
1348 getinfo = (cmd == GETALL);
1349 infosize = semds.sem_nsems * sizeof(short);
1350 /* "short" is technically wrong but much more portable
1351 than guessing about u_?short(_t)? */
1355 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1357 croak("%s not implemented", op_desc[optype]);
1366 SvPV_force(astr, len);
1367 a = SvGROW(astr, infosize+1);
1371 a = SvPV(astr, len);
1372 if (len != infosize)
1373 croak("Bad arg length for %s, is %d, should be %ld",
1374 op_desc[optype], len, (long)infosize);
1380 a = (char *)i; /* ouch */
1387 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1392 ret = semctl(id, n, cmd, (struct semid_ds *)a);
1397 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1401 if (getinfo && ret >= 0) {
1402 SvCUR_set(astr, infosize);
1403 *SvEND(astr) = '\0';
1417 I32 id, msize, flags;
1420 id = SvIVx(*++mark);
1422 flags = SvIVx(*++mark);
1423 mbuf = SvPV(mstr, len);
1424 if ((msize = len - sizeof(long)) < 0)
1425 croak("Arg too short for msgsnd");
1427 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1429 croak("msgsnd not implemented");
1442 I32 id, msize, flags, ret;
1445 id = SvIVx(*++mark);
1447 msize = SvIVx(*++mark);
1448 mtype = (long)SvIVx(*++mark);
1449 flags = SvIVx(*++mark);
1450 if (SvTHINKFIRST(mstr)) {
1451 if (SvREADONLY(mstr))
1452 croak("Can't msgrcv to readonly var");
1456 SvPV_force(mstr, len);
1457 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1460 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1462 SvCUR_set(mstr, sizeof(long)+ret);
1463 *SvEND(mstr) = '\0';
1467 croak("msgrcv not implemented");
1482 id = SvIVx(*++mark);
1484 opbuf = SvPV(opstr, opsize);
1485 if (opsize < sizeof(struct sembuf)
1486 || (opsize % sizeof(struct sembuf)) != 0) {
1487 SETERRNO(EINVAL,LIB$_INVARG);
1491 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1493 croak("semop not implemented");
1498 do_shmio(optype, mark, sp)
1506 I32 id, mpos, msize;
1508 struct shmid_ds shmds;
1510 id = SvIVx(*++mark);
1512 mpos = SvIVx(*++mark);
1513 msize = SvIVx(*++mark);
1515 if (shmctl(id, IPC_STAT, &shmds) == -1)
1517 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1518 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1521 shm = (Shmat_t)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1522 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1524 if (optype == OP_SHMREAD) {
1525 SvPV_force(mstr, len);
1526 mbuf = SvGROW(mstr, msize+1);
1528 Copy(shm + mpos, mbuf, msize, char);
1529 SvCUR_set(mstr, msize);
1530 *SvEND(mstr) = '\0';
1536 mbuf = SvPV(mstr, len);
1537 if ((n = len) > msize)
1539 Copy(mbuf, shm + mpos, n, char);
1541 memzero(shm + mpos + n, msize - n);
1545 croak("shm I/O not implemented");
1549 #endif /* SYSV IPC */