3 * Copyright (c) 1991-1997, 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));
38 # include <sys/utime.h>
50 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
54 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
59 #if defined(HAS_SOCKET) && !defined(VMS) /* VMS handles sockets via vmsish.h */
60 # include <sys/socket.h>
64 # include <net/errno.h>
70 do_open(gv,name,len,as_raw,rawmode,rawperm,supplied_fp)
78 register IO *io = GvIOn(gv);
79 PerlIO *saveifp = Nullfp;
80 PerlIO *saveofp = Nullfp;
87 forkprocess = 1; /* assume true if no fork */
90 fd = PerlIO_fileno(IoIFP(io));
91 if (IoTYPE(io) == '-')
93 else if (fd <= maxsysfd) {
96 savetype = IoTYPE(io);
99 else if (IoTYPE(io) == '|')
100 result = my_pclose(IoIFP(io));
101 else if (IoIFP(io) != IoOFP(io)) {
103 result = PerlIO_close(IoOFP(io));
104 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
107 result = PerlIO_close(IoIFP(io));
110 result = PerlIO_close(IoIFP(io));
111 if (result == EOF && fd > maxsysfd)
112 PerlIO_printf(PerlIO_stderr(), "Warning: unable to close filehandle %s properly.\n",
114 IoOFP(io) = IoIFP(io) = Nullfp;
118 result = rawmode & 3;
119 IoTYPE(io) = "<>++"[result];
120 writing = (result > 0);
121 fd = open(name, rawmode, rawperm);
129 else if (rawmode & O_APPEND)
130 fpmode = (result == 1) ? "a" : "a+";
133 fpmode = (result == 1) ? "w" : "r+";
134 fp = PerlIO_fdopen(fd, fpmode);
141 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
144 myname = savepvn(name, len);
147 while (len && isSPACE(name[len-1]))
150 mode[0] = mode[1] = mode[2] = '\0';
152 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
160 for (name++; isSPACE(*name); name++) ;
163 TAINT_PROPER("piped open");
164 if (dowarn && name[strlen(name)-1] == '|')
165 warn("Can't do bidirectional pipe");
166 fp = my_popen(name,"w");
169 else if (*name == '>') {
170 TAINT_PROPER("open");
173 mode[0] = IoTYPE(io) = 'a';
188 if (!*name && supplied_fp)
192 for (; isSPACE(*name); name++) ;
197 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
201 SETERRNO(EINVAL,SS$_IVCHAN);
206 fd = PerlIO_fileno(IoIFP(thatio));
207 if (IoTYPE(thatio) == 's')
215 if (!(fp = PerlIO_fdopen(fd,mode))) {
223 for (; isSPACE(*name); name++) ;
224 if (strEQ(name,"-")) {
225 fp = PerlIO_stdout();
229 fp = PerlIO_open(name,mode);
233 else if (*name == '<') {
235 for (name++; isSPACE(*name); name++) ;
239 if (strEQ(name,"-")) {
244 fp = PerlIO_open(name,mode);
246 else if (name[len-1] == '|') {
248 while (len && isSPACE(name[len-1]))
251 for (; isSPACE(*name); name++) ;
254 TAINT_PROPER("piped open");
255 fp = my_popen(name,"r");
261 for (; isSPACE(*name); name++) ;
262 if (strEQ(name,"-")) {
267 fp = PerlIO_open(name,"r");
271 if (dowarn && IoTYPE(io) == '<' && strchr(name, '\n'))
272 warn(warn_nl, "open");
276 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
277 if (Fstat(PerlIO_fileno(fp),&statbuf) < 0) {
278 (void)PerlIO_close(fp);
281 if (S_ISSOCK(statbuf.st_mode))
282 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
286 !(statbuf.st_mode & S_IFMT)
291 int buflen = sizeof tokenbuf;
292 if (getsockname(PerlIO_fileno(fp), (struct sockaddr *)tokenbuf, &buflen) >= 0
293 || errno != ENOTSOCK)
294 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
295 /* but some return 0 for streams too, sigh */
299 if (saveifp) { /* must use old fp? */
300 fd = PerlIO_fileno(saveifp);
302 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
303 if (saveofp != saveifp) { /* was a socket? */
304 PerlIO_close(saveofp);
309 if (fd != PerlIO_fileno(fp)) {
313 dup2(PerlIO_fileno(fp), fd);
314 sv = *av_fetch(fdpid,PerlIO_fileno(fp),TRUE);
315 (void)SvUPGRADE(sv, SVt_IV);
318 sv = *av_fetch(fdpid,fd,TRUE);
319 (void)SvUPGRADE(sv, SVt_IV);
327 #if defined(HAS_FCNTL) && defined(F_SETFD)
328 fd = PerlIO_fileno(fp);
329 fcntl(fd,F_SETFD,fd > maxsysfd);
333 if (IoTYPE(io) == 's'
334 || (IoTYPE(io) == '>' && S_ISCHR(statbuf.st_mode)) ) {
335 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
349 IoTYPE(io) = savetype;
358 #ifndef FLEXFILENAMES
366 argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
367 if (filemode & (S_ISUID|S_ISGID)) {
368 PerlIO_flush(IoIFP(GvIOn(argvoutgv))); /* chmod must follow last write */
370 (void)fchmod(lastfd,filemode);
372 (void)chmod(oldname,filemode);
376 while (av_len(GvAV(gv)) >= 0) {
378 sv = av_shift(GvAV(gv));
380 sv_setsv(GvSV(gv),sv);
381 SvSETMAGIC(GvSV(gv));
382 oldname = SvPVx(GvSV(gv), len);
383 if (do_open(gv,oldname,len,FALSE,0,0,Nullfp)) {
385 TAINT_PROPER("inplace open");
386 if (strEQ(oldname,"-")) {
387 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
388 return IoIFP(GvIOp(gv));
390 #ifndef FLEXFILENAMES
391 filedev = statbuf.st_dev;
392 fileino = statbuf.st_ino;
394 filemode = statbuf.st_mode;
395 fileuid = statbuf.st_uid;
396 filegid = statbuf.st_gid;
397 if (!S_ISREG(filemode)) {
398 warn("Can't do inplace edit: %s is not a regular file",
405 add_suffix(sv,inplace);
407 sv_catpv(sv,inplace);
409 #ifndef FLEXFILENAMES
410 if (Stat(SvPVX(sv),&statbuf) >= 0
411 && statbuf.st_dev == filedev
412 && statbuf.st_ino == fileino ) {
413 warn("Can't do inplace edit: %s > 14 characters",
421 if (rename(oldname,SvPVX(sv)) < 0) {
422 warn("Can't rename %s to %s: %s, skipping file",
423 oldname, SvPVX(sv), Strerror(errno) );
429 (void)unlink(SvPVX(sv));
430 (void)rename(oldname,SvPVX(sv));
431 do_open(gv,SvPVX(sv),SvCUR(sv),FALSE,0,0,Nullfp);
434 (void)UNLINK(SvPVX(sv));
435 if (link(oldname,SvPVX(sv)) < 0) {
436 warn("Can't rename %s to %s: %s, skipping file",
437 oldname, SvPVX(sv), Strerror(errno) );
441 (void)UNLINK(oldname);
445 #if !defined(DOSISH) && !defined(AMIGAOS)
446 # ifndef VMS /* Don't delete; use automatic file versioning */
447 if (UNLINK(oldname) < 0) {
448 warn("Can't rename %s to %s: %s, skipping file",
449 oldname, SvPVX(sv), Strerror(errno) );
455 croak("Can't do inplace edit without backup");
460 sv_catpv(sv,oldname);
461 SETERRNO(0,0); /* in case sprintf set errno */
462 if (!do_open(argvoutgv,SvPVX(sv),SvCUR(sv),FALSE,0,0,Nullfp)) {
463 warn("Can't do inplace edit on %s: %s",
464 oldname, Strerror(errno) );
468 setdefout(argvoutgv);
469 lastfd = PerlIO_fileno(IoIFP(GvIOp(argvoutgv)));
470 (void)Fstat(lastfd,&statbuf);
472 (void)fchmod(lastfd,filemode);
474 (void)chmod(oldname,filemode);
476 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
478 (void)fchown(lastfd,fileuid,filegid);
481 (void)chown(oldname,fileuid,filegid);
486 return IoIFP(GvIOp(gv));
489 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",SvPV(sv, na), Strerror(errno));
492 (void)do_close(argvoutgv,FALSE);
493 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
500 do_pipe(sv, rgv, wgv)
524 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
525 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
526 IoIFP(wstio) = IoOFP(wstio);
529 if (!IoIFP(rstio) || !IoOFP(wstio)) {
530 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
532 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
537 sv_setsv(sv,&sv_yes);
541 sv_setsv(sv,&sv_undef);
546 /* explicit renamed to avoid C++ conflict -- kja */
548 #ifndef CAN_PROTOTYPE
549 do_close(gv,not_implicit)
553 do_close(GV *gv, bool not_implicit)
554 #endif /* CAN_PROTOTYPE */
561 if (!gv || SvTYPE(gv) != SVt_PVGV) {
562 SETERRNO(EBADF,SS$_IVCHAN);
566 if (!io) { /* never opened */
567 if (dowarn && not_implicit)
568 warn("Close on unopened file <%s>",GvENAME(gv));
571 retval = io_close(io);
575 IoLINES_LEFT(io) = IoPAGE_LEN(io);
589 if (IoTYPE(io) == '|') {
590 status = my_pclose(IoIFP(io));
591 STATUS_NATIVE_SET(status);
592 retval = (STATUS_POSIX == 0);
594 else if (IoTYPE(io) == '-')
597 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
598 retval = (PerlIO_close(IoOFP(io)) != EOF);
599 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
602 retval = (PerlIO_close(IoIFP(io)) != EOF);
604 IoOFP(io) = IoIFP(io) = Nullfp;
624 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
625 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
626 return FALSE; /* this is the most usual case */
629 ch = PerlIO_getc(IoIFP(io));
631 (void)PerlIO_ungetc(IoIFP(io),ch);
634 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
635 if (PerlIO_get_cnt(IoIFP(io)) < -1)
636 PerlIO_set_cnt(IoIFP(io),-1);
638 if (op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
639 if (!nextargv(argvgv)) /* get another fp handy */
643 return TRUE; /* normal fp, definitely end of file */
658 if (!io || !IoIFP(io))
661 #ifdef ULTRIX_STDIO_BOTCH
662 if (PerlIO_eof(IoIFP(io)))
663 (void)PerlIO_seek (IoIFP(io), 0L, 2); /* ultrix 1.2 workaround */
666 return PerlIO_tell(IoIFP(io));
670 warn("tell() on unopened file");
671 SETERRNO(EBADF,RMS$_IFI);
676 do_seek(gv, pos, whence)
687 if (!io || !IoIFP(io))
690 #ifdef ULTRIX_STDIO_BOTCH
691 if (PerlIO_eof(IoIFP(io)))
692 (void)PerlIO_seek (IoIFP(io), 0L, 2); /* ultrix 1.2 workaround */
695 return PerlIO_seek(IoIFP(io), pos, whence) >= 0;
699 warn("seek() on unopened file");
700 SETERRNO(EBADF,RMS$_IFI);
704 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
705 /* code courtesy of William Kucharski */
708 I32 my_chsize(fd, length)
709 I32 fd; /* file descriptor */
710 Off_t length; /* length to set file to */
716 if (Fstat(fd, &filebuf) < 0)
719 if (filebuf.st_size < length) {
721 /* extend file length */
723 if ((lseek(fd, (length - 1), 0)) < 0)
726 /* write a "0" byte */
728 if ((write(fd, "", 1)) != 1)
732 /* truncate length */
737 fl.l_type = F_WRLCK; /* write lock on file space */
740 * This relies on the UNDOCUMENTED F_FREESP argument to
741 * fcntl(2), which truncates the file so that it ends at the
742 * position indicated by fl.l_start.
744 * Will minor miracles never cease?
747 if (fcntl(fd, F_FREESP, &fl) < 0)
754 #endif /* F_FREESP */
764 /* assuming fp is checked earlier */
770 if (SvIOK(sv) && SvIVX(sv) != 0) {
771 PerlIO_printf(fp, ofmt, (double)SvIVX(sv));
772 return !PerlIO_error(fp);
774 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
775 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
776 PerlIO_printf(fp, ofmt, SvNVX(sv));
777 return !PerlIO_error(fp);
780 switch (SvTYPE(sv)) {
789 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
790 return !PerlIO_error(fp);
794 tmps = SvPV(sv, len);
797 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
799 return !PerlIO_error(fp);
810 if (op->op_flags & OPf_REF) {
812 tmpgv = cGVOP->op_gv;
815 if (io && IoIFP(io)) {
817 sv_setpv(statname,"");
819 return (laststatval = Fstat(PerlIO_fileno(IoIFP(io)), &statcache));
825 warn("Stat on unopened file <%s>",
828 sv_setpv(statname,"");
829 return (laststatval = -1);
835 if (SvTYPE(sv) == SVt_PVGV) {
839 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
840 tmpgv = (GV*)SvRV(sv);
845 sv_setpv(statname,SvPV(sv, na));
847 laststatval = Stat(SvPV(sv, na),&statcache);
848 if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
849 warn(warn_nl, "stat");
860 if (op->op_flags & OPf_REF) {
862 if (cGVOP->op_gv == defgv) {
863 if (laststype != OP_LSTAT)
864 croak("The stat preceding -l _ wasn't an lstat");
867 croak("You can't use -l on a filehandle");
870 laststype = OP_LSTAT;
874 sv_setpv(statname,SvPV(sv, na));
876 laststatval = lstat(SvPV(sv, na),&statcache);
878 laststatval = Stat(SvPV(sv, na),&statcache);
880 if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
881 warn(warn_nl, "lstat");
886 do_aexec(really,mark,sp)
895 New(401,Argv, sp - mark + 1, char*);
897 while (++mark <= sp) {
899 *a++ = SvPVx(*mark, na);
904 if (*Argv[0] != '/') /* will execvp use PATH? */
905 TAINT_ENV(); /* testing IFS here is overkill, probably */
906 if (really && *(tmps = SvPV(really, na)))
909 execvp(Argv[0],Argv);
911 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
922 Argv = Null(char **);
940 while (*cmd && isSPACE(*cmd))
943 /* save an extra exec if possible */
946 if (strnEQ(cmd,cshname,cshlen) && strnEQ(cmd+cshlen," -c",3)) {
964 execl(cshname,"csh", flags,ncmd,(char*)0);
972 /* see if there are shell metacharacters in it */
974 if (*cmd == '.' && isSPACE(cmd[1]))
977 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
980 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
984 for (s = cmd; *s; s++) {
985 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
986 if (*s == '\n' && !s[1]) {
991 execl(sh_path, "sh", "-c", cmd, (char*)0);
996 New(402,Argv, (s - cmd) / 2 + 2, char*);
997 Cmd = savepvn(cmd, s-cmd);
1000 while (*s && isSPACE(*s)) s++;
1003 while (*s && !isSPACE(*s)) s++;
1009 execvp(Argv[0],Argv);
1010 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1015 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
1031 register I32 tot = 0;
1033 SV **oldmark = mark;
1036 while (++mark <= sp) {
1037 if (SvTAINTED(*mark)) {
1046 TAINT_PROPER("chmod");
1050 while (++mark <= sp) {
1051 if (chmod(SvPVx(*mark, na),val))
1058 TAINT_PROPER("chown");
1059 if (sp - mark > 2) {
1060 val = SvIVx(*++mark);
1061 val2 = SvIVx(*++mark);
1063 while (++mark <= sp) {
1064 if (chown(SvPVx(*mark, na),val,val2))
1072 TAINT_PROPER("kill");
1075 s = SvPVx(*++mark, na);
1078 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1080 if (!(val = whichsig(s)))
1081 croak("Unrecognized signal name \"%s\"",s);
1086 /* kill() doesn't do process groups (job trees?) under VMS */
1087 if (val < 0) val = -val;
1088 if (val == SIGKILL) {
1089 # include <starlet.h>
1090 /* Use native sys$delprc() to insure that target process is
1091 * deleted; supervisor-mode images don't pay attention to
1092 * CRTL's emulation of Unix-style signals and kill()
1094 while (++mark <= sp) {
1095 I32 proc = SvIVx(*mark);
1096 register unsigned long int __vmssts;
1097 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1101 case SS$_NOSUCHNODE:
1102 SETERRNO(ESRCH,__vmssts);
1105 SETERRNO(EPERM,__vmssts);
1108 SETERRNO(EVMSERR,__vmssts);
1117 while (++mark <= sp) {
1118 I32 proc = SvIVx(*mark);
1120 if (killpg(proc,val)) /* BSD */
1122 if (kill(-proc,val)) /* SYSV */
1128 while (++mark <= sp) {
1129 if (kill(SvIVx(*mark),val))
1136 TAINT_PROPER("unlink");
1138 while (++mark <= sp) {
1139 s = SvPVx(*mark, na);
1140 if (euid || unsafe) {
1144 else { /* don't let root wipe out directories without -U */
1146 if (lstat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1148 if (Stat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1160 TAINT_PROPER("utime");
1161 if (sp - mark > 2) {
1162 #if defined(I_UTIME) || defined(VMS)
1163 struct utimbuf utbuf;
1171 Zero(&utbuf, sizeof utbuf, char);
1173 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1174 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1176 utbuf.actime = SvIVx(*++mark); /* time accessed */
1177 utbuf.modtime = SvIVx(*++mark); /* time modified */
1180 while (++mark <= sp) {
1181 if (utime(SvPVx(*mark, na),&utbuf))
1193 /* Do the permissions allow some operation? Assumes statcache already set. */
1194 #ifndef VMS /* VMS' cando is in vms.c */
1196 cando(bit, effective, statbufp)
1199 register struct stat *statbufp;
1202 /* [Comments and code from Len Reed]
1203 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1204 * to write-protected files. The execute permission bit is set
1205 * by the Miscrosoft C library stat() function for the following:
1210 * All files and directories are readable.
1211 * Directories and special files, e.g. "CON", cannot be
1213 * [Comment by Tom Dinger -- a directory can have the write-protect
1214 * bit set in the file system, but DOS permits changes to
1215 * the directory anyway. In addition, all bets are off
1216 * here for networked software, such as Novell and
1220 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1221 * too so it will actually look into the files for magic numbers
1223 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1225 #else /* ! DOSISH */
1226 if ((effective ? euid : uid) == 0) { /* root is special */
1227 if (bit == S_IXUSR) {
1228 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1232 return TRUE; /* root reads and writes anything */
1235 if (statbufp->st_uid == (effective ? euid : uid) ) {
1236 if (statbufp->st_mode & bit)
1237 return TRUE; /* ok as "user" */
1239 else if (ingroup((I32)statbufp->st_gid,effective)) {
1240 if (statbufp->st_mode & bit >> 3)
1241 return TRUE; /* ok as "group" */
1243 else if (statbufp->st_mode & bit >> 6)
1244 return TRUE; /* ok as "other" */
1246 #endif /* ! DOSISH */
1251 ingroup(testgid,effective)
1255 if (testgid == (effective ? egid : gid))
1257 #ifdef HAS_GETGROUPS
1262 Groups_t gary[NGROUPS];
1265 anum = getgroups(NGROUPS,gary);
1267 if (gary[anum] == testgid)
1274 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1277 do_ipcget(optype, mark, sp)
1285 key = (key_t)SvNVx(*++mark);
1286 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1287 flags = SvIVx(*++mark);
1293 return msgget(key, flags);
1297 return semget(key, n, flags);
1301 return shmget(key, n, flags);
1303 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1305 croak("%s not implemented", op_desc[optype]);
1308 return -1; /* should never happen */
1312 do_ipcctl(optype, mark, sp)
1319 I32 id, n, cmd, infosize, getinfo;
1322 id = SvIVx(*++mark);
1323 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1324 cmd = SvIVx(*++mark);
1327 getinfo = (cmd == IPC_STAT);
1333 if (cmd == IPC_STAT || cmd == IPC_SET)
1334 infosize = sizeof(struct msqid_ds);
1339 if (cmd == IPC_STAT || cmd == IPC_SET)
1340 infosize = sizeof(struct shmid_ds);
1345 if (cmd == IPC_STAT || cmd == IPC_SET)
1346 infosize = sizeof(struct semid_ds);
1347 else if (cmd == GETALL || cmd == SETALL)
1349 struct semid_ds semds;
1350 if (semctl(id, 0, IPC_STAT, &semds) == -1)
1352 getinfo = (cmd == GETALL);
1353 infosize = semds.sem_nsems * sizeof(short);
1354 /* "short" is technically wrong but much more portable
1355 than guessing about u_?short(_t)? */
1359 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1361 croak("%s not implemented", op_desc[optype]);
1370 SvPV_force(astr, len);
1371 a = SvGROW(astr, infosize+1);
1375 a = SvPV(astr, len);
1376 if (len != infosize)
1377 croak("Bad arg length for %s, is %lu, should be %ld",
1378 op_desc[optype], (unsigned long)len, (long)infosize);
1384 a = (char *)i; /* ouch */
1391 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1396 ret = semctl(id, n, cmd, (struct semid_ds *)a);
1401 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1405 if (getinfo && ret >= 0) {
1406 SvCUR_set(astr, infosize);
1407 *SvEND(astr) = '\0';
1421 I32 id, msize, flags;
1424 id = SvIVx(*++mark);
1426 flags = SvIVx(*++mark);
1427 mbuf = SvPV(mstr, len);
1428 if ((msize = len - sizeof(long)) < 0)
1429 croak("Arg too short for msgsnd");
1431 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1433 croak("msgsnd not implemented");
1446 I32 id, msize, flags, ret;
1449 id = SvIVx(*++mark);
1451 msize = SvIVx(*++mark);
1452 mtype = (long)SvIVx(*++mark);
1453 flags = SvIVx(*++mark);
1454 if (SvTHINKFIRST(mstr)) {
1455 if (SvREADONLY(mstr))
1456 croak("Can't msgrcv to readonly var");
1460 SvPV_force(mstr, len);
1461 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1464 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1466 SvCUR_set(mstr, sizeof(long)+ret);
1467 *SvEND(mstr) = '\0';
1471 croak("msgrcv not implemented");
1486 id = SvIVx(*++mark);
1488 opbuf = SvPV(opstr, opsize);
1489 if (opsize < sizeof(struct sembuf)
1490 || (opsize % sizeof(struct sembuf)) != 0) {
1491 SETERRNO(EINVAL,LIB$_INVARG);
1495 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1497 croak("semop not implemented");
1502 do_shmio(optype, mark, sp)
1510 I32 id, mpos, msize;
1512 struct shmid_ds shmds;
1514 id = SvIVx(*++mark);
1516 mpos = SvIVx(*++mark);
1517 msize = SvIVx(*++mark);
1519 if (shmctl(id, IPC_STAT, &shmds) == -1)
1521 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1522 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1525 shm = (Shmat_t)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1526 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1528 if (optype == OP_SHMREAD) {
1529 SvPV_force(mstr, len);
1530 mbuf = SvGROW(mstr, msize+1);
1532 Copy(shm + mpos, mbuf, msize, char);
1533 SvCUR_set(mstr, msize);
1534 *SvEND(mstr) = '\0';
1540 mbuf = SvPV(mstr, len);
1541 if ((n = len) > msize)
1543 Copy(mbuf, shm + mpos, n, char);
1545 memzero(shm + mpos + n, msize - n);
1549 croak("shm I/O not implemented");
1553 #endif /* SYSV IPC */