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 forkprocess = 1; /* assume true if no fork */
100 fd = PerlIO_fileno(IoIFP(io));
101 if (IoTYPE(io) == '-')
103 else if (fd <= 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 > 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 (dowarn && IoTYPE(io) == '<' && strchr(name, '\n'))
287 warn(warn_nl, "open");
291 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
293 if (PerlLIO_fstat(PerlIO_fileno(fp),&statbuf) < 0) {
294 (void)PerlIO_close(fp);
297 if (S_ISSOCK(statbuf.st_mode))
298 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
302 !(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(fdpid,PerlIO_fileno(fp),TRUE);
333 (void)SvUPGRADE(sv, SVt_IV);
336 sv = *av_fetch(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 > maxsysfd);
353 if (IoTYPE(io) == 's'
354 || (IoTYPE(io) == '>' && S_ISCHR(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 argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
386 if (filemode & (S_ISUID|S_ISGID)) {
387 PerlIO_flush(IoIFP(GvIOn(argvoutgv))); /* chmod must follow last write */
389 (void)fchmod(lastfd,filemode);
391 (void)PerlLIO_chmod(oldname,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 oldname = SvPVx(GvSV(gv), oldlen);
403 if (do_open(gv,oldname,oldlen,inplace!=0,0,0,Nullfp)) {
405 TAINT_PROPER("inplace open");
406 if (oldlen == 1 && *oldname == '-') {
407 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
408 return IoIFP(GvIOp(gv));
410 #ifndef FLEXFILENAMES
411 filedev = statbuf.st_dev;
412 fileino = statbuf.st_ino;
414 filemode = statbuf.st_mode;
415 fileuid = statbuf.st_uid;
416 filegid = statbuf.st_gid;
417 if (!S_ISREG(filemode)) {
418 warn("Can't do inplace edit: %s is not a regular file",
424 char *star = strchr(inplace, '*');
426 char *begin = inplace;
427 sv_setpvn(sv, "", 0);
429 sv_catpvn(sv, begin, star - begin);
430 sv_catpvn(sv, oldname, oldlen);
432 } while ((star = strchr(begin, '*')));
435 sv_catpv(sv,inplace);
437 #ifndef FLEXFILENAMES
438 if (PerlLIO_stat(SvPVX(sv),&statbuf) >= 0
439 && statbuf.st_dev == filedev
440 && statbuf.st_ino == fileino
442 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
445 warn("Can't do inplace edit: %s would not be uniq",
453 if (PerlLIO_rename(oldname,SvPVX(sv)) < 0) {
454 warn("Can't rename %s to %s: %s, skipping file",
455 oldname, SvPVX(sv), Strerror(errno) );
461 (void)PerlLIO_unlink(SvPVX(sv));
462 (void)PerlLIO_rename(oldname,SvPVX(sv));
463 do_open(gv,SvPVX(sv),SvCUR(sv),inplace!=0,0,0,Nullfp);
466 (void)UNLINK(SvPVX(sv));
467 if (link(oldname,SvPVX(sv)) < 0) {
468 warn("Can't rename %s to %s: %s, skipping file",
469 oldname, SvPVX(sv), Strerror(errno) );
473 (void)UNLINK(oldname);
477 #if !defined(DOSISH) && !defined(AMIGAOS)
478 # ifndef VMS /* Don't delete; use automatic file versioning */
479 if (UNLINK(oldname) < 0) {
480 warn("Can't remove %s: %s, skipping file",
481 oldname, Strerror(errno) );
487 croak("Can't do inplace edit without backup");
491 sv_setpvn(sv,">",!inplace);
492 sv_catpvn(sv,oldname,oldlen);
493 SETERRNO(0,0); /* in case sprintf set errno */
494 if (!do_open(argvoutgv,SvPVX(sv),SvCUR(sv),inplace!=0,
495 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) {
496 warn("Can't do inplace edit on %s: %s",
497 oldname, Strerror(errno) );
501 setdefout(argvoutgv);
502 lastfd = PerlIO_fileno(IoIFP(GvIOp(argvoutgv)));
503 (void)PerlLIO_fstat(lastfd,&statbuf);
505 (void)fchmod(lastfd,filemode);
507 # if !(defined(WIN32) && defined(__BORLANDC__))
508 /* Borland runtime creates a readonly file! */
509 (void)PerlLIO_chmod(oldname,filemode);
512 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
514 (void)fchown(lastfd,fileuid,filegid);
517 (void)PerlLIO_chown(oldname,fileuid,filegid);
522 return IoIFP(GvIOp(gv));
525 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",
526 SvPV(sv, na), Strerror(errno));
529 (void)do_close(argvoutgv,FALSE);
530 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
537 do_pipe(SV *sv, GV *rgv, GV *wgv)
556 if (PerlProc_pipe(fd) < 0)
558 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
559 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
560 IoIFP(wstio) = IoOFP(wstio);
563 if (!IoIFP(rstio) || !IoOFP(wstio)) {
564 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
565 else PerlLIO_close(fd[0]);
566 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
567 else PerlLIO_close(fd[1]);
571 sv_setsv(sv,&sv_yes);
575 sv_setsv(sv,&sv_undef);
580 /* explicit renamed to avoid C++ conflict -- kja */
582 do_close(GV *gv, bool not_implicit)
589 if (!gv || SvTYPE(gv) != SVt_PVGV) {
591 SETERRNO(EBADF,SS$_IVCHAN);
595 if (!io) { /* never opened */
598 warn("Close on unopened file <%s>",GvENAME(gv));
599 SETERRNO(EBADF,SS$_IVCHAN);
603 retval = io_close(io);
607 IoLINES_LEFT(io) = IoPAGE_LEN(io);
620 if (IoTYPE(io) == '|') {
621 status = PerlProc_pclose(IoIFP(io));
622 STATUS_NATIVE_SET(status);
623 retval = (STATUS_POSIX == 0);
625 else if (IoTYPE(io) == '-')
628 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
629 retval = (PerlIO_close(IoOFP(io)) != EOF);
630 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
633 retval = (PerlIO_close(IoIFP(io)) != EOF);
635 IoOFP(io) = IoIFP(io) = Nullfp;
638 SETERRNO(EBADF,SS$_IVCHAN);
658 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
659 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
660 return FALSE; /* this is the most usual case */
663 ch = PerlIO_getc(IoIFP(io));
665 (void)PerlIO_ungetc(IoIFP(io),ch);
668 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
669 if (PerlIO_get_cnt(IoIFP(io)) < -1)
670 PerlIO_set_cnt(IoIFP(io),-1);
672 if (op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
673 if (!nextargv(argvgv)) /* get another fp handy */
677 return TRUE; /* normal fp, definitely end of file */
688 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
689 #ifdef ULTRIX_STDIO_BOTCH
691 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
693 return PerlIO_tell(fp);
696 warn("tell() on unopened file");
697 SETERRNO(EBADF,RMS$_IFI);
702 do_seek(GV *gv, long int pos, int whence)
707 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
708 #ifdef ULTRIX_STDIO_BOTCH
710 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
712 return PerlIO_seek(fp, pos, whence) >= 0;
715 warn("seek() on unopened file");
716 SETERRNO(EBADF,RMS$_IFI);
721 do_sysseek(GV *gv, long int pos, int whence)
726 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
727 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
729 warn("sysseek() on unopened file");
730 SETERRNO(EBADF,RMS$_IFI);
735 do_binmode(PerlIO *fp, int iotype, int flag)
738 croak("panic: unsetting binmode"); /* Not implemented yet */
741 if (!PerlIO_flush(fp) && (fp->_flag |= _IOBIN))
746 if (PerlLIO_setmode(PerlIO_fileno(fp), OP_BINARY) != -1) {
747 #if defined(WIN32) && defined(__BORLANDC__)
748 /* The translation mode of the stream is maintained independent
749 * of the translation mode of the fd in the Borland RTL (heavy
750 * digging through their runtime sources reveal). User has to
751 * set the mode explicitly for the stream (though they don't
752 * document this anywhere). GSAR 97-5-24
754 PerlIO_seek(fp,0L,0);
755 ((FILE*)fp)->flags |= _F_BIN;
763 #if defined(USEMYBINMODE)
764 if (my_binmode(fp,iotype) != NULL)
774 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
775 /* code courtesy of William Kucharski */
778 I32 my_chsize(fd, length)
779 I32 fd; /* file descriptor */
780 Off_t length; /* length to set file to */
785 if (PerlLIO_fstat(fd, &filebuf) < 0)
788 if (filebuf.st_size < length) {
790 /* extend file length */
792 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
795 /* write a "0" byte */
797 if ((PerlLIO_write(fd, "", 1)) != 1)
801 /* truncate length */
806 fl.l_type = F_WRLCK; /* write lock on file space */
809 * This relies on the UNDOCUMENTED F_FREESP argument to
810 * fcntl(2), which truncates the file so that it ends at the
811 * position indicated by fl.l_start.
813 * Will minor miracles never cease?
816 if (fcntl(fd, F_FREESP, &fl) < 0)
823 #endif /* F_FREESP */
826 do_print(register SV *sv, PerlIO *fp)
831 /* assuming fp is checked earlier */
837 if (SvIOK(sv) && SvIVX(sv) != 0) {
838 PerlIO_printf(fp, ofmt, (double)SvIVX(sv));
839 return !PerlIO_error(fp);
841 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
842 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
843 PerlIO_printf(fp, ofmt, SvNVX(sv));
844 return !PerlIO_error(fp);
847 switch (SvTYPE(sv)) {
856 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
857 return !PerlIO_error(fp);
861 tmps = SvPV(sv, len);
864 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
866 return !PerlIO_error(fp);
876 if (op->op_flags & OPf_REF) {
878 tmpgv = cGVOP->op_gv;
881 if (io && IoIFP(io)) {
883 sv_setpv(statname,"");
885 return (laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &statcache));
891 warn("Stat on unopened file <%s>",
894 sv_setpv(statname,"");
895 return (laststatval = -1);
902 if (SvTYPE(sv) == SVt_PVGV) {
906 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
907 tmpgv = (GV*)SvRV(sv);
913 sv_setpv(statname, s);
915 laststatval = PerlLIO_stat(s, &statcache);
916 if (laststatval < 0 && dowarn && strchr(s, '\n'))
917 warn(warn_nl, "stat");
927 if (op->op_flags & OPf_REF) {
929 if (cGVOP->op_gv == defgv) {
930 if (laststype != OP_LSTAT)
931 croak("The stat preceding -l _ wasn't an lstat");
934 croak("You can't use -l on a filehandle");
937 laststype = OP_LSTAT;
941 sv_setpv(statname,SvPV(sv, na));
943 laststatval = PerlLIO_lstat(SvPV(sv, na),&statcache);
945 laststatval = PerlLIO_stat(SvPV(sv, na),&statcache);
947 if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
948 warn(warn_nl, "lstat");
953 do_aexec(SV *really, register SV **mark, register SV **sp)
960 New(401,Argv, sp - mark + 1, char*);
962 while (++mark <= sp) {
964 *a++ = SvPVx(*mark, na);
969 if (*Argv[0] != '/') /* will execvp use PATH? */
970 TAINT_ENV(); /* testing IFS here is overkill, probably */
971 if (really && *(tmps = SvPV(really, na)))
972 PerlProc_execvp(tmps,Argv);
974 PerlProc_execvp(Argv[0],Argv);
976 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
987 Argv = Null(char **);
995 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP)
1004 while (*cmd && isSPACE(*cmd))
1007 /* save an extra exec if possible */
1010 if (strnEQ(cmd,cshname,cshlen) && strnEQ(cmd+cshlen," -c",3)) {
1026 if (s[-1] == '\'') {
1028 PerlProc_execl(cshname,"csh", flags,ncmd,(char*)0);
1036 /* see if there are shell metacharacters in it */
1038 if (*cmd == '.' && isSPACE(cmd[1]))
1041 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1044 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
1048 for (s = cmd; *s; s++) {
1049 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1050 if (*s == '\n' && !s[1]) {
1055 PerlProc_execl(sh_path, "sh", "-c", cmd, (char*)0);
1060 New(402,Argv, (s - cmd) / 2 + 2, char*);
1061 Cmd = savepvn(cmd, s-cmd);
1063 for (s = Cmd; *s;) {
1064 while (*s && isSPACE(*s)) s++;
1067 while (*s && !isSPACE(*s)) s++;
1073 PerlProc_execvp(Argv[0],Argv);
1074 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1079 warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
1085 #endif /* OS2 || WIN32 */
1088 apply(I32 type, register SV **mark, register SV **sp)
1093 register I32 tot = 0;
1096 SV **oldmark = mark;
1098 #define APPLY_TAINT_PROPER() \
1100 if (tainting && tainted) { goto taint_proper_label; } \
1103 /* This is a first heuristic; it doesn't catch tainting magic. */
1105 while (++mark <= sp) {
1106 if (SvTAINTED(*mark)) {
1116 APPLY_TAINT_PROPER();
1119 APPLY_TAINT_PROPER();
1121 while (++mark <= sp) {
1122 char *name = SvPVx(*mark, na);
1123 APPLY_TAINT_PROPER();
1124 if (PerlLIO_chmod(name, val))
1132 APPLY_TAINT_PROPER();
1133 if (sp - mark > 2) {
1134 val = SvIVx(*++mark);
1135 val2 = SvIVx(*++mark);
1136 APPLY_TAINT_PROPER();
1138 while (++mark <= sp) {
1139 char *name = SvPVx(*mark, na);
1140 APPLY_TAINT_PROPER();
1141 if (PerlLIO_chown(name, val, val2))
1148 XXX Should we make lchown() directly available from perl?
1149 For now, we'll let Configure test for HAS_LCHOWN, but do
1150 nothing in the core.
1156 APPLY_TAINT_PROPER();
1159 s = SvPVx(*++mark, na);
1161 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1163 if (!(val = whichsig(s)))
1164 croak("Unrecognized signal name \"%s\"",s);
1168 APPLY_TAINT_PROPER();
1171 /* kill() doesn't do process groups (job trees?) under VMS */
1172 if (val < 0) val = -val;
1173 if (val == SIGKILL) {
1174 # include <starlet.h>
1175 /* Use native sys$delprc() to insure that target process is
1176 * deleted; supervisor-mode images don't pay attention to
1177 * CRTL's emulation of Unix-style signals and kill()
1179 while (++mark <= sp) {
1180 I32 proc = SvIVx(*mark);
1181 register unsigned long int __vmssts;
1182 APPLY_TAINT_PROPER();
1183 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1187 case SS$_NOSUCHNODE:
1188 SETERRNO(ESRCH,__vmssts);
1191 SETERRNO(EPERM,__vmssts);
1194 SETERRNO(EVMSERR,__vmssts);
1203 while (++mark <= sp) {
1204 I32 proc = SvIVx(*mark);
1205 APPLY_TAINT_PROPER();
1207 if (PerlProc_killpg(proc,val)) /* BSD */
1209 if (PerlProc_kill(-proc,val)) /* SYSV */
1215 while (++mark <= sp) {
1216 I32 proc = SvIVx(*mark);
1217 APPLY_TAINT_PROPER();
1218 if (PerlProc_kill(proc, val))
1226 APPLY_TAINT_PROPER();
1228 while (++mark <= sp) {
1229 s = SvPVx(*mark, na);
1230 APPLY_TAINT_PROPER();
1231 if (euid || unsafe) {
1235 else { /* don't let root wipe out directories without -U */
1237 if (PerlLIO_lstat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1239 if (PerlLIO_stat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
1252 APPLY_TAINT_PROPER();
1253 if (sp - mark > 2) {
1254 #if defined(I_UTIME) || defined(VMS)
1255 struct utimbuf utbuf;
1263 Zero(&utbuf, sizeof utbuf, char);
1265 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1266 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1268 utbuf.actime = SvIVx(*++mark); /* time accessed */
1269 utbuf.modtime = SvIVx(*++mark); /* time modified */
1271 APPLY_TAINT_PROPER();
1273 while (++mark <= sp) {
1274 char *name = SvPVx(*mark, na);
1275 APPLY_TAINT_PROPER();
1276 if (PerlLIO_utime(name, &utbuf))
1289 return 0; /* this should never happen */
1291 #undef APPLY_TAINT_PROPER
1294 /* Do the permissions allow some operation? Assumes statcache already set. */
1295 #ifndef VMS /* VMS' cando is in vms.c */
1297 cando(I32 bit, I32 effective, register struct stat *statbufp)
1300 /* [Comments and code from Len Reed]
1301 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1302 * to write-protected files. The execute permission bit is set
1303 * by the Miscrosoft C library stat() function for the following:
1308 * All files and directories are readable.
1309 * Directories and special files, e.g. "CON", cannot be
1311 * [Comment by Tom Dinger -- a directory can have the write-protect
1312 * bit set in the file system, but DOS permits changes to
1313 * the directory anyway. In addition, all bets are off
1314 * here for networked software, such as Novell and
1318 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1319 * too so it will actually look into the files for magic numbers
1321 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1323 #else /* ! DOSISH */
1324 if ((effective ? euid : uid) == 0) { /* root is special */
1325 if (bit == S_IXUSR) {
1326 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1330 return TRUE; /* root reads and writes anything */
1333 if (statbufp->st_uid == (effective ? euid : uid) ) {
1334 if (statbufp->st_mode & bit)
1335 return TRUE; /* ok as "user" */
1337 else if (ingroup((I32)statbufp->st_gid,effective)) {
1338 if (statbufp->st_mode & bit >> 3)
1339 return TRUE; /* ok as "group" */
1341 else if (statbufp->st_mode & bit >> 6)
1342 return TRUE; /* ok as "other" */
1344 #endif /* ! DOSISH */
1349 ingroup(I32 testgid, I32 effective)
1351 if (testgid == (effective ? egid : gid))
1353 #ifdef HAS_GETGROUPS
1358 Groups_t gary[NGROUPS];
1361 anum = getgroups(NGROUPS,gary);
1363 if (gary[anum] == testgid)
1370 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1373 do_ipcget(I32 optype, SV **mark, SV **sp)
1379 key = (key_t)SvNVx(*++mark);
1380 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1381 flags = SvIVx(*++mark);
1387 return msgget(key, flags);
1391 return semget(key, n, flags);
1395 return shmget(key, n, flags);
1397 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1399 croak("%s not implemented", op_desc[optype]);
1402 return -1; /* should never happen */
1406 do_ipcctl(I32 optype, SV **mark, SV **sp)
1411 I32 id, n, cmd, infosize, getinfo;
1414 id = SvIVx(*++mark);
1415 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1416 cmd = SvIVx(*++mark);
1419 getinfo = (cmd == IPC_STAT);
1425 if (cmd == IPC_STAT || cmd == IPC_SET)
1426 infosize = sizeof(struct msqid_ds);
1431 if (cmd == IPC_STAT || cmd == IPC_SET)
1432 infosize = sizeof(struct shmid_ds);
1437 if (cmd == IPC_STAT || cmd == IPC_SET)
1438 infosize = sizeof(struct semid_ds);
1439 else if (cmd == GETALL || cmd == SETALL)
1441 struct semid_ds semds;
1445 getinfo = (cmd == GETALL);
1446 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1448 infosize = semds.sem_nsems * sizeof(short);
1449 /* "short" is technically wrong but much more portable
1450 than guessing about u_?short(_t)? */
1454 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1456 croak("%s not implemented", op_desc[optype]);
1465 SvPV_force(astr, len);
1466 a = SvGROW(astr, infosize+1);
1470 a = SvPV(astr, len);
1471 if (len != infosize)
1472 croak("Bad arg length for %s, is %lu, should be %ld",
1473 op_desc[optype], (unsigned long)len, (long)infosize);
1479 a = (char *)i; /* ouch */
1486 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1491 union semun unsemds;
1493 unsemds.buf = (struct semid_ds *)a;
1494 ret = Semctl(id, n, cmd, unsemds);
1500 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1504 if (getinfo && ret >= 0) {
1505 SvCUR_set(astr, infosize);
1506 *SvEND(astr) = '\0';
1513 do_msgsnd(SV **mark, SV **sp)
1519 I32 id, msize, flags;
1522 id = SvIVx(*++mark);
1524 flags = SvIVx(*++mark);
1525 mbuf = SvPV(mstr, len);
1526 if ((msize = len - sizeof(long)) < 0)
1527 croak("Arg too short for msgsnd");
1529 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1531 croak("msgsnd not implemented");
1536 do_msgrcv(SV **mark, SV **sp)
1543 I32 id, msize, flags, ret;
1546 id = SvIVx(*++mark);
1548 msize = SvIVx(*++mark);
1549 mtype = (long)SvIVx(*++mark);
1550 flags = SvIVx(*++mark);
1551 if (SvTHINKFIRST(mstr)) {
1552 if (SvREADONLY(mstr))
1553 croak("Can't msgrcv to readonly var");
1557 SvPV_force(mstr, len);
1558 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1561 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1563 SvCUR_set(mstr, sizeof(long)+ret);
1564 *SvEND(mstr) = '\0';
1568 croak("msgrcv not implemented");
1573 do_semop(SV **mark, SV **sp)
1582 id = SvIVx(*++mark);
1584 opbuf = SvPV(opstr, opsize);
1585 if (opsize < sizeof(struct sembuf)
1586 || (opsize % sizeof(struct sembuf)) != 0) {
1587 SETERRNO(EINVAL,LIB$_INVARG);
1591 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1593 croak("semop not implemented");
1598 do_shmio(I32 optype, SV **mark, SV **sp)
1604 I32 id, mpos, msize;
1606 struct shmid_ds shmds;
1608 id = SvIVx(*++mark);
1610 mpos = SvIVx(*++mark);
1611 msize = SvIVx(*++mark);
1613 if (shmctl(id, IPC_STAT, &shmds) == -1)
1615 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1616 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1619 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1620 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1622 if (optype == OP_SHMREAD) {
1623 SvPV_force(mstr, len);
1624 mbuf = SvGROW(mstr, msize+1);
1626 Copy(shm + mpos, mbuf, msize, char);
1627 SvCUR_set(mstr, msize);
1628 *SvEND(mstr) = '\0';
1634 mbuf = SvPV(mstr, len);
1635 if ((n = len) > msize)
1637 Copy(mbuf, shm + mpos, n, char);
1639 memzero(shm + mpos + n, msize - n);
1643 croak("shm I/O not implemented");
1647 #endif /* SYSV IPC */