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));
37 # if defined(_MSC_VER) || defined(__MINGW32__)
38 # include <sys/utime.h>
51 # define OPEN_EXCL O_EXCL
56 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
60 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
65 #if defined(HAS_SOCKET) && !defined(VMS) /* VMS handles sockets via vmsish.h */
66 # include <sys/socket.h>
70 # include <net/errno.h>
75 /* Put this after #includes because <unistd.h> defines _XOPEN_*. */
77 # if _XOPEN_VERSION >= 5 || defined(_XOPEN_SOURCE_EXTENDED) || defined(__GLIBC__)
78 # define Sock_size_t Size_t
80 # define Sock_size_t int
85 do_open(GV *gv, register char *name, I32 len, int as_raw, int rawmode, int rawperm, PerlIO *supplied_fp)
87 register IO *io = GvIOn(gv);
88 PerlIO *saveifp = Nullfp;
89 PerlIO *saveofp = Nullfp;
95 bool was_fdopen = FALSE;
97 PL_forkprocess = 1; /* assume true if no fork */
100 fd = PerlIO_fileno(IoIFP(io));
101 if (IoTYPE(io) == '-')
103 else if (fd <= PL_maxsysfd) {
106 savetype = IoTYPE(io);
109 else if (IoTYPE(io) == '|')
110 result = PerlProc_pclose(IoIFP(io));
111 else if (IoIFP(io) != IoOFP(io)) {
113 result = PerlIO_close(IoOFP(io));
114 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
117 result = PerlIO_close(IoIFP(io));
120 result = PerlIO_close(IoIFP(io));
121 if (result == EOF && fd > PL_maxsysfd)
122 PerlIO_printf(PerlIO_stderr(), "Warning: unable to close filehandle %s properly.\n",
124 IoOFP(io) = IoIFP(io) = Nullfp;
128 result = rawmode & 3;
129 IoTYPE(io) = "<>++"[result];
130 writing = (result > 0);
131 fd = PerlLIO_open3(name, rawmode, rawperm);
139 else if (rawmode & O_APPEND)
140 fpmode = (result == 1) ? "a" : "a+";
143 fpmode = (result == 1) ? "w" : "r+";
144 fp = PerlIO_fdopen(fd, fpmode);
151 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
154 myname = savepvn(name, len);
157 while (len && isSPACE(name[len-1]))
160 mode[0] = mode[1] = mode[2] = '\0';
162 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
170 for (name++; isSPACE(*name); name++) ;
173 TAINT_PROPER("piped open");
174 if (name[strlen(name)-1] == '|') {
175 name[strlen(name)-1] = '\0' ;
177 warn("Can't do bidirectional pipe");
179 fp = PerlProc_popen(name,"w");
182 else if (*name == '>') {
183 TAINT_PROPER("open");
186 mode[0] = IoTYPE(io) = 'a';
201 if (!*name && supplied_fp)
205 for (; isSPACE(*name); name++) ;
210 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
214 SETERRNO(EINVAL,SS$_IVCHAN);
219 fd = PerlIO_fileno(IoIFP(thatio));
220 if (IoTYPE(thatio) == 's')
227 fd = PerlLIO_dup(fd);
230 if (!(fp = PerlIO_fdopen(fd,mode))) {
238 for (; isSPACE(*name); name++) ;
239 if (strEQ(name,"-")) {
240 fp = PerlIO_stdout();
244 fp = PerlIO_open(name,mode);
248 else if (*name == '<') {
250 for (name++; isSPACE(*name); name++) ;
254 if (strEQ(name,"-")) {
259 fp = PerlIO_open(name,mode);
261 else if (len > 1 && name[len-1] == '|') {
263 while (len && isSPACE(name[len-1]))
266 for (; isSPACE(*name); name++) ;
269 TAINT_PROPER("piped open");
270 fp = PerlProc_popen(name,"r");
276 for (; isSPACE(*name); name++) ;
277 if (strEQ(name,"-")) {
282 fp = PerlIO_open(name,"r");
286 if (PL_dowarn && IoTYPE(io) == '<' && strchr(name, '\n'))
287 warn(warn_nl, "open");
291 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
293 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
294 (void)PerlIO_close(fp);
297 if (S_ISSOCK(PL_statbuf.st_mode))
298 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
302 !(PL_statbuf.st_mode & S_IFMT)
308 Sock_size_t buflen = sizeof tmpbuf;
309 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
311 || errno != ENOTSOCK)
312 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
313 /* but some return 0 for streams too, sigh */
317 if (saveifp) { /* must use old fp? */
318 fd = PerlIO_fileno(saveifp);
320 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
321 if (saveofp != saveifp) { /* was a socket? */
322 PerlIO_close(saveofp);
327 if (fd != PerlIO_fileno(fp)) {
331 PerlLIO_dup2(PerlIO_fileno(fp), fd);
332 sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
333 (void)SvUPGRADE(sv, SVt_IV);
336 sv = *av_fetch(PL_fdpid,fd,TRUE);
337 (void)SvUPGRADE(sv, SVt_IV);
346 #if defined(HAS_FCNTL) && defined(F_SETFD)
347 fd = PerlIO_fileno(fp);
348 fcntl(fd,F_SETFD,fd > PL_maxsysfd);
353 if (IoTYPE(io) == 's'
354 || (IoTYPE(io) == '>' && S_ISCHR(PL_statbuf.st_mode)) ) {
355 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
369 IoTYPE(io) = savetype;
374 nextargv(register GV *gv)
377 #ifndef FLEXFILENAMES
385 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
386 if (PL_filemode & (S_ISUID|S_ISGID)) {
387 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
389 (void)fchmod(PL_lastfd,PL_filemode);
391 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
395 while (av_len(GvAV(gv)) >= 0) {
398 sv = av_shift(GvAV(gv));
400 sv_setsv(GvSV(gv),sv);
401 SvSETMAGIC(GvSV(gv));
402 PL_oldname = SvPVx(GvSV(gv), oldlen);
403 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,0,0,Nullfp)) {
405 TAINT_PROPER("inplace open");
406 if (oldlen == 1 && *PL_oldname == '-') {
407 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
408 return IoIFP(GvIOp(gv));
410 #ifndef FLEXFILENAMES
411 filedev = PL_statbuf.st_dev;
412 fileino = PL_statbuf.st_ino;
414 PL_filemode = PL_statbuf.st_mode;
415 fileuid = PL_statbuf.st_uid;
416 filegid = PL_statbuf.st_gid;
417 if (!S_ISREG(PL_filemode)) {
418 warn("Can't do inplace edit: %s is not a regular file",
424 char *star = strchr(PL_inplace, '*');
426 char *begin = PL_inplace;
427 sv_setpvn(sv, "", 0);
429 sv_catpvn(sv, begin, star - begin);
430 sv_catpvn(sv, PL_oldname, oldlen);
432 } while ((star = strchr(begin, '*')));
437 sv_catpv(sv,PL_inplace);
439 #ifndef FLEXFILENAMES
440 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
441 && PL_statbuf.st_dev == filedev
442 && PL_statbuf.st_ino == fileino
444 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
447 warn("Can't do inplace edit: %s would not be uniq",
455 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
456 warn("Can't rename %s to %s: %s, skipping file",
457 PL_oldname, SvPVX(sv), Strerror(errno) );
463 (void)PerlLIO_unlink(SvPVX(sv));
464 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
465 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,0,0,Nullfp);
468 (void)UNLINK(SvPVX(sv));
469 if (link(PL_oldname,SvPVX(sv)) < 0) {
470 warn("Can't rename %s to %s: %s, skipping file",
471 PL_oldname, SvPVX(sv), Strerror(errno) );
475 (void)UNLINK(PL_oldname);
479 #if !defined(DOSISH) && !defined(AMIGAOS)
480 # ifndef VMS /* Don't delete; use automatic file versioning */
481 if (UNLINK(PL_oldname) < 0) {
482 warn("Can't remove %s: %s, skipping file",
483 PL_oldname, Strerror(errno) );
489 croak("Can't do inplace edit without backup");
493 sv_setpvn(sv,">",!PL_inplace);
494 sv_catpvn(sv,PL_oldname,oldlen);
495 SETERRNO(0,0); /* in case sprintf set errno */
497 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
498 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp)) {
500 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
501 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) {
503 warn("Can't do inplace edit on %s: %s",
504 PL_oldname, Strerror(errno) );
508 setdefout(PL_argvoutgv);
509 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
510 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
512 (void)fchmod(PL_lastfd,PL_filemode);
514 # if !(defined(WIN32) && defined(__BORLANDC__))
515 /* Borland runtime creates a readonly file! */
516 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
519 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
521 (void)fchown(PL_lastfd,fileuid,filegid);
524 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
529 return IoIFP(GvIOp(gv));
532 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",
533 SvPV(sv, PL_na), Strerror(errno));
536 (void)do_close(PL_argvoutgv,FALSE);
537 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
544 do_pipe(SV *sv, GV *rgv, GV *wgv)
563 if (PerlProc_pipe(fd) < 0)
565 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
566 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
567 IoIFP(wstio) = IoOFP(wstio);
570 if (!IoIFP(rstio) || !IoOFP(wstio)) {
571 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
572 else PerlLIO_close(fd[0]);
573 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
574 else PerlLIO_close(fd[1]);
578 sv_setsv(sv,&PL_sv_yes);
582 sv_setsv(sv,&PL_sv_undef);
587 /* explicit renamed to avoid C++ conflict -- kja */
589 do_close(GV *gv, bool not_implicit)
596 if (!gv || SvTYPE(gv) != SVt_PVGV) {
598 SETERRNO(EBADF,SS$_IVCHAN);
602 if (!io) { /* never opened */
605 warn("Close on unopened file <%s>",GvENAME(gv));
606 SETERRNO(EBADF,SS$_IVCHAN);
610 retval = io_close(io);
614 IoLINES_LEFT(io) = IoPAGE_LEN(io);
627 if (IoTYPE(io) == '|') {
628 status = PerlProc_pclose(IoIFP(io));
629 STATUS_NATIVE_SET(status);
630 retval = (STATUS_POSIX == 0);
632 else if (IoTYPE(io) == '-')
635 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
636 retval = (PerlIO_close(IoOFP(io)) != EOF);
637 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
640 retval = (PerlIO_close(IoIFP(io)) != EOF);
642 IoOFP(io) = IoIFP(io) = Nullfp;
645 SETERRNO(EBADF,SS$_IVCHAN);
665 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
666 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
667 return FALSE; /* this is the most usual case */
670 ch = PerlIO_getc(IoIFP(io));
672 (void)PerlIO_ungetc(IoIFP(io),ch);
675 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
676 if (PerlIO_get_cnt(IoIFP(io)) < -1)
677 PerlIO_set_cnt(IoIFP(io),-1);
679 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
680 if (!nextargv(PL_argvgv)) /* get another fp handy */
684 return TRUE; /* normal fp, definitely end of file */
695 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
696 #ifdef ULTRIX_STDIO_BOTCH
698 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
700 return PerlIO_tell(fp);
703 warn("tell() on unopened file");
704 SETERRNO(EBADF,RMS$_IFI);
709 do_seek(GV *gv, long int pos, int whence)
714 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
715 #ifdef ULTRIX_STDIO_BOTCH
717 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
719 return PerlIO_seek(fp, pos, whence) >= 0;
722 warn("seek() on unopened file");
723 SETERRNO(EBADF,RMS$_IFI);
728 do_sysseek(GV *gv, long int pos, int whence)
733 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
734 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
736 warn("sysseek() on unopened file");
737 SETERRNO(EBADF,RMS$_IFI);
742 do_binmode(PerlIO *fp, int iotype, int flag)
745 croak("panic: unsetting binmode"); /* Not implemented yet */
748 if (!PerlIO_flush(fp) && (fp->_flag |= _IOBIN))
753 if (PerlLIO_setmode(PerlIO_fileno(fp), OP_BINARY) != -1) {
754 #if defined(WIN32) && defined(__BORLANDC__)
755 /* The translation mode of the stream is maintained independent
756 * of the translation mode of the fd in the Borland RTL (heavy
757 * digging through their runtime sources reveal). User has to
758 * set the mode explicitly for the stream (though they don't
759 * document this anywhere). GSAR 97-5-24
761 PerlIO_seek(fp,0L,0);
762 ((FILE*)fp)->flags |= _F_BIN;
770 #if defined(USEMYBINMODE)
771 if (my_binmode(fp,iotype) != NULL)
781 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
782 /* code courtesy of William Kucharski */
785 I32 my_chsize(fd, length)
786 I32 fd; /* file descriptor */
787 Off_t length; /* length to set file to */
792 if (PerlLIO_fstat(fd, &filebuf) < 0)
795 if (filebuf.st_size < length) {
797 /* extend file length */
799 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
802 /* write a "0" byte */
804 if ((PerlLIO_write(fd, "", 1)) != 1)
808 /* truncate length */
813 fl.l_type = F_WRLCK; /* write lock on file space */
816 * This relies on the UNDOCUMENTED F_FREESP argument to
817 * fcntl(2), which truncates the file so that it ends at the
818 * position indicated by fl.l_start.
820 * Will minor miracles never cease?
823 if (fcntl(fd, F_FREESP, &fl) < 0)
830 #endif /* F_FREESP */
833 do_print(register SV *sv, PerlIO *fp)
838 /* assuming fp is checked earlier */
844 if (SvIOK(sv) && SvIVX(sv) != 0) {
845 PerlIO_printf(fp, PL_ofmt, (double)SvIVX(sv));
846 return !PerlIO_error(fp);
848 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
849 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
850 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
851 return !PerlIO_error(fp);
854 switch (SvTYPE(sv)) {
863 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
864 return !PerlIO_error(fp);
868 tmps = SvPV(sv, len);
871 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
873 return !PerlIO_error(fp);
883 if (PL_op->op_flags & OPf_REF) {
885 tmpgv = cGVOP->op_gv;
888 if (io && IoIFP(io)) {
890 sv_setpv(PL_statname,"");
891 PL_laststype = OP_STAT;
892 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
895 if (tmpgv == PL_defgv)
896 return PL_laststatval;
898 warn("Stat on unopened file <%s>",
901 sv_setpv(PL_statname,"");
902 return (PL_laststatval = -1);
909 if (SvTYPE(sv) == SVt_PVGV) {
913 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
914 tmpgv = (GV*)SvRV(sv);
920 sv_setpv(PL_statname, s);
921 PL_laststype = OP_STAT;
922 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
923 if (PL_laststatval < 0 && PL_dowarn && strchr(s, '\n'))
924 warn(warn_nl, "stat");
925 return PL_laststatval;
934 if (PL_op->op_flags & OPf_REF) {
936 if (cGVOP->op_gv == PL_defgv) {
937 if (PL_laststype != OP_LSTAT)
938 croak("The stat preceding -l _ wasn't an lstat");
939 return PL_laststatval;
941 croak("You can't use -l on a filehandle");
944 PL_laststype = OP_LSTAT;
948 sv_setpv(PL_statname,SvPV(sv, PL_na));
950 PL_laststatval = PerlLIO_lstat(SvPV(sv, PL_na),&PL_statcache);
952 PL_laststatval = PerlLIO_stat(SvPV(sv, PL_na),&PL_statcache);
954 if (PL_laststatval < 0 && PL_dowarn && strchr(SvPV(sv, PL_na), '\n'))
955 warn(warn_nl, "lstat");
956 return PL_laststatval;
960 do_aexec(SV *really, register SV **mark, register SV **sp)
967 New(401,PL_Argv, sp - mark + 1, char*);
969 while (++mark <= sp) {
971 *a++ = SvPVx(*mark, PL_na);
976 if (*PL_Argv[0] != '/') /* will execvp use PATH? */
977 TAINT_ENV(); /* testing IFS here is overkill, probably */
978 if (really && *(tmps = SvPV(really, PL_na)))
979 PerlProc_execvp(tmps,PL_Argv);
981 PerlProc_execvp(PL_Argv[0],PL_Argv);
983 warn("Can't exec \"%s\": %s", PL_Argv[0], Strerror(errno));
994 PL_Argv = Null(char **);
1002 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP)
1011 while (*cmd && isSPACE(*cmd))
1014 /* save an extra exec if possible */
1017 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1019 s = cmd+PL_cshlen+3;
1033 if (s[-1] == '\'') {
1035 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1043 /* see if there are shell metacharacters in it */
1045 if (*cmd == '.' && isSPACE(cmd[1]))
1048 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1051 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
1055 for (s = cmd; *s; s++) {
1056 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1057 if (*s == '\n' && !s[1]) {
1062 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1067 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1068 PL_Cmd = savepvn(cmd, s-cmd);
1070 for (s = PL_Cmd; *s;) {
1071 while (*s && isSPACE(*s)) s++;
1074 while (*s && !isSPACE(*s)) s++;
1080 PerlProc_execvp(PL_Argv[0],PL_Argv);
1081 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1086 warn("Can't exec \"%s\": %s", PL_Argv[0], Strerror(errno));
1092 #endif /* OS2 || WIN32 */
1095 apply(I32 type, register SV **mark, register SV **sp)
1100 register I32 tot = 0;
1103 SV **oldmark = mark;
1105 #define APPLY_TAINT_PROPER() \
1107 if (PL_tainting && PL_tainted) { goto taint_proper_label; } \
1110 /* This is a first heuristic; it doesn't catch tainting magic. */
1112 while (++mark <= sp) {
1113 if (SvTAINTED(*mark)) {
1123 APPLY_TAINT_PROPER();
1126 APPLY_TAINT_PROPER();
1128 while (++mark <= sp) {
1129 char *name = SvPVx(*mark, PL_na);
1130 APPLY_TAINT_PROPER();
1131 if (PerlLIO_chmod(name, val))
1139 APPLY_TAINT_PROPER();
1140 if (sp - mark > 2) {
1141 val = SvIVx(*++mark);
1142 val2 = SvIVx(*++mark);
1143 APPLY_TAINT_PROPER();
1145 while (++mark <= sp) {
1146 char *name = SvPVx(*mark, PL_na);
1147 APPLY_TAINT_PROPER();
1148 if (PerlLIO_chown(name, val, val2))
1155 XXX Should we make lchown() directly available from perl?
1156 For now, we'll let Configure test for HAS_LCHOWN, but do
1157 nothing in the core.
1163 APPLY_TAINT_PROPER();
1166 s = SvPVx(*++mark, PL_na);
1168 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1170 if (!(val = whichsig(s)))
1171 croak("Unrecognized signal name \"%s\"",s);
1175 APPLY_TAINT_PROPER();
1178 /* kill() doesn't do process groups (job trees?) under VMS */
1179 if (val < 0) val = -val;
1180 if (val == SIGKILL) {
1181 # include <starlet.h>
1182 /* Use native sys$delprc() to insure that target process is
1183 * deleted; supervisor-mode images don't pay attention to
1184 * CRTL's emulation of Unix-style signals and kill()
1186 while (++mark <= sp) {
1187 I32 proc = SvIVx(*mark);
1188 register unsigned long int __vmssts;
1189 APPLY_TAINT_PROPER();
1190 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1194 case SS$_NOSUCHNODE:
1195 SETERRNO(ESRCH,__vmssts);
1198 SETERRNO(EPERM,__vmssts);
1201 SETERRNO(EVMSERR,__vmssts);
1210 while (++mark <= sp) {
1211 I32 proc = SvIVx(*mark);
1212 APPLY_TAINT_PROPER();
1214 if (PerlProc_killpg(proc,val)) /* BSD */
1216 if (PerlProc_kill(-proc,val)) /* SYSV */
1222 while (++mark <= sp) {
1223 I32 proc = SvIVx(*mark);
1224 APPLY_TAINT_PROPER();
1225 if (PerlProc_kill(proc, val))
1233 APPLY_TAINT_PROPER();
1235 while (++mark <= sp) {
1236 s = SvPVx(*mark, PL_na);
1237 APPLY_TAINT_PROPER();
1238 if (PL_euid || PL_unsafe) {
1242 else { /* don't let root wipe out directories without -U */
1244 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1246 if (PerlLIO_stat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1259 APPLY_TAINT_PROPER();
1260 if (sp - mark > 2) {
1261 #if defined(I_UTIME) || defined(VMS)
1262 struct utimbuf utbuf;
1270 Zero(&utbuf, sizeof utbuf, char);
1272 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1273 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1275 utbuf.actime = SvIVx(*++mark); /* time accessed */
1276 utbuf.modtime = SvIVx(*++mark); /* time modified */
1278 APPLY_TAINT_PROPER();
1280 while (++mark <= sp) {
1281 char *name = SvPVx(*mark, PL_na);
1282 APPLY_TAINT_PROPER();
1283 if (PerlLIO_utime(name, &utbuf))
1296 return 0; /* this should never happen */
1298 #undef APPLY_TAINT_PROPER
1301 /* Do the permissions allow some operation? Assumes statcache already set. */
1302 #ifndef VMS /* VMS' cando is in vms.c */
1304 cando(I32 bit, I32 effective, register struct stat *statbufp)
1307 /* [Comments and code from Len Reed]
1308 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1309 * to write-protected files. The execute permission bit is set
1310 * by the Miscrosoft C library stat() function for the following:
1315 * All files and directories are readable.
1316 * Directories and special files, e.g. "CON", cannot be
1318 * [Comment by Tom Dinger -- a directory can have the write-protect
1319 * bit set in the file system, but DOS permits changes to
1320 * the directory anyway. In addition, all bets are off
1321 * here for networked software, such as Novell and
1325 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1326 * too so it will actually look into the files for magic numbers
1328 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1330 #else /* ! DOSISH */
1331 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1332 if (bit == S_IXUSR) {
1333 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1337 return TRUE; /* root reads and writes anything */
1340 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1341 if (statbufp->st_mode & bit)
1342 return TRUE; /* ok as "user" */
1344 else if (ingroup((I32)statbufp->st_gid,effective)) {
1345 if (statbufp->st_mode & bit >> 3)
1346 return TRUE; /* ok as "group" */
1348 else if (statbufp->st_mode & bit >> 6)
1349 return TRUE; /* ok as "other" */
1351 #endif /* ! DOSISH */
1356 ingroup(I32 testgid, I32 effective)
1358 if (testgid == (effective ? PL_egid : PL_gid))
1360 #ifdef HAS_GETGROUPS
1365 Groups_t gary[NGROUPS];
1368 anum = getgroups(NGROUPS,gary);
1370 if (gary[anum] == testgid)
1377 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1380 do_ipcget(I32 optype, SV **mark, SV **sp)
1386 key = (key_t)SvNVx(*++mark);
1387 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1388 flags = SvIVx(*++mark);
1394 return msgget(key, flags);
1398 return semget(key, n, flags);
1402 return shmget(key, n, flags);
1404 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1406 croak("%s not implemented", op_desc[optype]);
1409 return -1; /* should never happen */
1413 do_ipcctl(I32 optype, SV **mark, SV **sp)
1418 I32 id, n, cmd, infosize, getinfo;
1421 id = SvIVx(*++mark);
1422 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1423 cmd = SvIVx(*++mark);
1426 getinfo = (cmd == IPC_STAT);
1432 if (cmd == IPC_STAT || cmd == IPC_SET)
1433 infosize = sizeof(struct msqid_ds);
1438 if (cmd == IPC_STAT || cmd == IPC_SET)
1439 infosize = sizeof(struct shmid_ds);
1444 if (cmd == IPC_STAT || cmd == IPC_SET)
1445 infosize = sizeof(struct semid_ds);
1446 else if (cmd == GETALL || cmd == SETALL)
1448 struct semid_ds semds;
1452 getinfo = (cmd == GETALL);
1453 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1455 infosize = semds.sem_nsems * sizeof(short);
1456 /* "short" is technically wrong but much more portable
1457 than guessing about u_?short(_t)? */
1461 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1463 croak("%s not implemented", op_desc[optype]);
1472 SvPV_force(astr, len);
1473 a = SvGROW(astr, infosize+1);
1477 a = SvPV(astr, len);
1478 if (len != infosize)
1479 croak("Bad arg length for %s, is %lu, should be %ld",
1480 op_desc[optype], (unsigned long)len, (long)infosize);
1486 a = (char *)i; /* ouch */
1493 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1498 union semun unsemds;
1500 unsemds.buf = (struct semid_ds *)a;
1501 ret = Semctl(id, n, cmd, unsemds);
1507 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1511 if (getinfo && ret >= 0) {
1512 SvCUR_set(astr, infosize);
1513 *SvEND(astr) = '\0';
1520 do_msgsnd(SV **mark, SV **sp)
1526 I32 id, msize, flags;
1529 id = SvIVx(*++mark);
1531 flags = SvIVx(*++mark);
1532 mbuf = SvPV(mstr, len);
1533 if ((msize = len - sizeof(long)) < 0)
1534 croak("Arg too short for msgsnd");
1536 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1538 croak("msgsnd not implemented");
1543 do_msgrcv(SV **mark, SV **sp)
1550 I32 id, msize, flags, ret;
1553 id = SvIVx(*++mark);
1555 msize = SvIVx(*++mark);
1556 mtype = (long)SvIVx(*++mark);
1557 flags = SvIVx(*++mark);
1558 if (SvTHINKFIRST(mstr)) {
1559 if (SvREADONLY(mstr))
1560 croak("Can't msgrcv to readonly var");
1564 SvPV_force(mstr, len);
1565 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1568 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1570 SvCUR_set(mstr, sizeof(long)+ret);
1571 *SvEND(mstr) = '\0';
1575 croak("msgrcv not implemented");
1580 do_semop(SV **mark, SV **sp)
1589 id = SvIVx(*++mark);
1591 opbuf = SvPV(opstr, opsize);
1592 if (opsize < sizeof(struct sembuf)
1593 || (opsize % sizeof(struct sembuf)) != 0) {
1594 SETERRNO(EINVAL,LIB$_INVARG);
1598 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1600 croak("semop not implemented");
1605 do_shmio(I32 optype, SV **mark, SV **sp)
1611 I32 id, mpos, msize;
1613 struct shmid_ds shmds;
1615 id = SvIVx(*++mark);
1617 mpos = SvIVx(*++mark);
1618 msize = SvIVx(*++mark);
1620 if (shmctl(id, IPC_STAT, &shmds) == -1)
1622 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1623 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1626 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1627 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1629 if (optype == OP_SHMREAD) {
1630 SvPV_force(mstr, len);
1631 mbuf = SvGROW(mstr, msize+1);
1633 Copy(shm + mpos, mbuf, msize, char);
1634 SvCUR_set(mstr, msize);
1635 *SvEND(mstr) = '\0';
1641 mbuf = SvPV(mstr, len);
1642 if ((n = len) > msize)
1644 Copy(mbuf, shm + mpos, n, char);
1646 memzero(shm + mpos + n, msize - n);
1650 croak("shm I/O not implemented");
1654 #endif /* SYSV IPC */