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 #if defined(O_LARGEFILE)
129 rawmode |= O_LARGEFILE;
133 #define O_ACCMODE 3 /* Assume traditional implementation */
136 switch (result = rawmode & O_ACCMODE) {
149 writing = (result > 0);
150 fd = PerlLIO_open3(name, rawmode, rawperm);
156 if (result == O_RDONLY)
159 else if (rawmode & O_APPEND)
160 fpmode = (result == O_WRONLY) ? "a" : "a+";
163 fpmode = (result == O_WRONLY) ? "w" : "r+";
164 fp = PerlIO_fdopen(fd, fpmode);
171 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
174 myname = savepvn(name, len);
177 while (len && isSPACE(name[len-1]))
180 mode[0] = mode[1] = mode[2] = '\0';
182 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
190 for (name++; isSPACE(*name); name++) ;
193 TAINT_PROPER("piped open");
194 if (name[strlen(name)-1] == '|') {
196 name[strlen(name)-1] = '\0' ;
197 if (ckWARN(WARN_PIPE))
198 warner(WARN_PIPE, "Can't do bidirectional pipe");
200 fp = PerlProc_popen(name,"w");
203 else if (*name == '>') {
204 TAINT_PROPER("open");
207 mode[0] = IoTYPE(io) = 'a';
222 if (!*name && supplied_fp)
226 for (; isSPACE(*name); name++) ;
231 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
235 SETERRNO(EINVAL,SS$_IVCHAN);
240 fd = PerlIO_fileno(IoIFP(thatio));
241 if (IoTYPE(thatio) == 's')
248 fd = PerlLIO_dup(fd);
251 if (!(fp = PerlIO_fdopen(fd,mode))) {
259 for (; isSPACE(*name); name++) ;
260 if (strEQ(name,"-")) {
261 fp = PerlIO_stdout();
265 fp = PerlIO_open(name,mode);
269 else if (*name == '<') {
271 for (name++; isSPACE(*name); name++) ;
275 if (strEQ(name,"-")) {
280 fp = PerlIO_open(name,mode);
282 else if (len > 1 && name[len-1] == '|') {
284 while (len && isSPACE(name[len-1]))
287 for (; isSPACE(*name); name++) ;
290 TAINT_PROPER("piped open");
291 fp = PerlProc_popen(name,"r");
297 for (; isSPACE(*name); name++) ;
298 if (strEQ(name,"-")) {
303 fp = PerlIO_open(name,"r");
308 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == '<' && strchr(name, '\n'))
309 warner(WARN_NEWLINE, PL_warn_nl, "open");
313 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
315 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
316 (void)PerlIO_close(fp);
319 if (S_ISSOCK(PL_statbuf.st_mode))
320 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
324 !(PL_statbuf.st_mode & S_IFMT)
330 Sock_size_t buflen = sizeof tmpbuf;
331 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
333 || errno != ENOTSOCK)
334 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
335 /* but some return 0 for streams too, sigh */
339 if (saveifp) { /* must use old fp? */
340 fd = PerlIO_fileno(saveifp);
342 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
343 if (saveofp != saveifp) { /* was a socket? */
344 PerlIO_close(saveofp);
349 if (fd != PerlIO_fileno(fp)) {
353 PerlLIO_dup2(PerlIO_fileno(fp), fd);
354 sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
355 (void)SvUPGRADE(sv, SVt_IV);
358 sv = *av_fetch(PL_fdpid,fd,TRUE);
359 (void)SvUPGRADE(sv, SVt_IV);
368 #if defined(HAS_FCNTL) && defined(F_SETFD)
370 int save_errno = errno;
371 fd = PerlIO_fileno(fp);
372 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
379 if (IoTYPE(io) == 's'
380 || (IoTYPE(io) == '>' && S_ISCHR(PL_statbuf.st_mode)) ) {
381 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
395 IoTYPE(io) = savetype;
400 nextargv(register GV *gv)
403 #ifndef FLEXFILENAMES
411 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
412 if (PL_filemode & (S_ISUID|S_ISGID)) {
413 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
415 (void)fchmod(PL_lastfd,PL_filemode);
417 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
421 while (av_len(GvAV(gv)) >= 0) {
424 sv = av_shift(GvAV(gv));
426 sv_setsv(GvSV(gv),sv);
427 SvSETMAGIC(GvSV(gv));
428 PL_oldname = SvPVx(GvSV(gv), oldlen);
429 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
431 TAINT_PROPER("inplace open");
432 if (oldlen == 1 && *PL_oldname == '-') {
433 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
434 return IoIFP(GvIOp(gv));
436 #ifndef FLEXFILENAMES
437 filedev = PL_statbuf.st_dev;
438 fileino = PL_statbuf.st_ino;
440 PL_filemode = PL_statbuf.st_mode;
441 fileuid = PL_statbuf.st_uid;
442 filegid = PL_statbuf.st_gid;
443 if (!S_ISREG(PL_filemode)) {
444 warn("Can't do inplace edit: %s is not a regular file",
450 char *star = strchr(PL_inplace, '*');
452 char *begin = PL_inplace;
453 sv_setpvn(sv, "", 0);
455 sv_catpvn(sv, begin, star - begin);
456 sv_catpvn(sv, PL_oldname, oldlen);
458 } while ((star = strchr(begin, '*')));
463 sv_catpv(sv,PL_inplace);
465 #ifndef FLEXFILENAMES
466 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
467 && PL_statbuf.st_dev == filedev
468 && PL_statbuf.st_ino == fileino
470 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
473 warn("Can't do inplace edit: %s would not be uniq",
481 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
482 warn("Can't rename %s to %s: %s, skipping file",
483 PL_oldname, SvPVX(sv), Strerror(errno) );
489 (void)PerlLIO_unlink(SvPVX(sv));
490 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
491 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
494 (void)UNLINK(SvPVX(sv));
495 if (link(PL_oldname,SvPVX(sv)) < 0) {
496 warn("Can't rename %s to %s: %s, skipping file",
497 PL_oldname, SvPVX(sv), Strerror(errno) );
501 (void)UNLINK(PL_oldname);
505 #if !defined(DOSISH) && !defined(AMIGAOS)
506 # ifndef VMS /* Don't delete; use automatic file versioning */
507 if (UNLINK(PL_oldname) < 0) {
508 warn("Can't remove %s: %s, skipping file",
509 PL_oldname, Strerror(errno) );
515 croak("Can't do inplace edit without backup");
519 sv_setpvn(sv,">",!PL_inplace);
520 sv_catpvn(sv,PL_oldname,oldlen);
521 SETERRNO(0,0); /* in case sprintf set errno */
523 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
524 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp)) {
526 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
527 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) {
529 warn("Can't do inplace edit on %s: %s",
530 PL_oldname, Strerror(errno) );
534 setdefout(PL_argvoutgv);
535 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
536 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
538 (void)fchmod(PL_lastfd,PL_filemode);
540 # if !(defined(WIN32) && defined(__BORLANDC__))
541 /* Borland runtime creates a readonly file! */
542 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
545 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
547 (void)fchown(PL_lastfd,fileuid,filegid);
550 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
555 return IoIFP(GvIOp(gv));
558 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",
559 SvPV(sv, oldlen), Strerror(errno));
562 (void)do_close(PL_argvoutgv,FALSE);
563 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
570 do_pipe(SV *sv, GV *rgv, GV *wgv)
589 if (PerlProc_pipe(fd) < 0)
591 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
592 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
593 IoIFP(wstio) = IoOFP(wstio);
596 if (!IoIFP(rstio) || !IoOFP(wstio)) {
597 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
598 else PerlLIO_close(fd[0]);
599 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
600 else PerlLIO_close(fd[1]);
604 sv_setsv(sv,&PL_sv_yes);
608 sv_setsv(sv,&PL_sv_undef);
613 /* explicit renamed to avoid C++ conflict -- kja */
615 do_close(GV *gv, bool not_implicit)
622 if (!gv || SvTYPE(gv) != SVt_PVGV) {
624 SETERRNO(EBADF,SS$_IVCHAN);
628 if (!io) { /* never opened */
631 if (ckWARN(WARN_UNOPENED))
632 warner(WARN_UNOPENED,
633 "Close on unopened file <%s>",GvENAME(gv));
634 SETERRNO(EBADF,SS$_IVCHAN);
638 retval = io_close(io);
642 IoLINES_LEFT(io) = IoPAGE_LEN(io);
655 if (IoTYPE(io) == '|') {
656 status = PerlProc_pclose(IoIFP(io));
657 STATUS_NATIVE_SET(status);
658 retval = (STATUS_POSIX == 0);
660 else if (IoTYPE(io) == '-')
663 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
664 retval = (PerlIO_close(IoOFP(io)) != EOF);
665 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
668 retval = (PerlIO_close(IoIFP(io)) != EOF);
670 IoOFP(io) = IoIFP(io) = Nullfp;
673 SETERRNO(EBADF,SS$_IVCHAN);
693 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
694 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
695 return FALSE; /* this is the most usual case */
698 ch = PerlIO_getc(IoIFP(io));
700 (void)PerlIO_ungetc(IoIFP(io),ch);
703 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
704 if (PerlIO_get_cnt(IoIFP(io)) < -1)
705 PerlIO_set_cnt(IoIFP(io),-1);
707 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
708 if (!nextargv(PL_argvgv)) /* get another fp handy */
712 return TRUE; /* normal fp, definitely end of file */
723 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
724 #ifdef ULTRIX_STDIO_BOTCH
726 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
728 return PerlIO_tell(fp);
732 if (ckWARN(WARN_UNOPENED))
733 warner(WARN_UNOPENED, "tell() on unopened file");
735 SETERRNO(EBADF,RMS$_IFI);
740 do_seek(GV *gv, Off_t pos, int whence)
745 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
746 #ifdef ULTRIX_STDIO_BOTCH
748 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
750 return PerlIO_seek(fp, pos, whence) >= 0;
754 if (ckWARN(WARN_UNOPENED))
755 warner(WARN_UNOPENED, "seek() on unopened file");
757 SETERRNO(EBADF,RMS$_IFI);
762 do_sysseek(GV *gv, Off_t pos, int whence)
767 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
768 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
771 if (ckWARN(WARN_UNOPENED))
772 warner(WARN_UNOPENED, "sysseek() on unopened file");
774 SETERRNO(EBADF,RMS$_IFI);
779 do_binmode(PerlIO *fp, int iotype, int flag)
782 croak("panic: unsetting binmode"); /* Not implemented yet */
785 if (!PerlIO_flush(fp) && (fp->_flag |= _IOBIN))
790 if (PerlLIO_setmode(PerlIO_fileno(fp), OP_BINARY) != -1) {
791 #if defined(WIN32) && defined(__BORLANDC__)
792 /* The translation mode of the stream is maintained independent
793 * of the translation mode of the fd in the Borland RTL (heavy
794 * digging through their runtime sources reveal). User has to
795 * set the mode explicitly for the stream (though they don't
796 * document this anywhere). GSAR 97-5-24
798 PerlIO_seek(fp,0L,0);
799 ((FILE*)fp)->flags |= _F_BIN;
807 #if defined(USEMYBINMODE)
808 if (my_binmode(fp,iotype) != NULL)
818 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
819 /* code courtesy of William Kucharski */
822 I32 my_chsize(fd, length)
823 I32 fd; /* file descriptor */
824 Off_t length; /* length to set file to */
829 if (PerlLIO_fstat(fd, &filebuf) < 0)
832 if (filebuf.st_size < length) {
834 /* extend file length */
836 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
839 /* write a "0" byte */
841 if ((PerlLIO_write(fd, "", 1)) != 1)
845 /* truncate length */
850 fl.l_type = F_WRLCK; /* write lock on file space */
853 * This relies on the UNDOCUMENTED F_FREESP argument to
854 * fcntl(2), which truncates the file so that it ends at the
855 * position indicated by fl.l_start.
857 * Will minor miracles never cease?
860 if (fcntl(fd, F_FREESP, &fl) < 0)
867 #endif /* F_FREESP */
870 do_print(register SV *sv, PerlIO *fp)
875 /* assuming fp is checked earlier */
881 if (SvIOK(sv) && SvIVX(sv) != 0) {
882 PerlIO_printf(fp, PL_ofmt, (double)SvIVX(sv));
883 return !PerlIO_error(fp);
885 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
886 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
887 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
888 return !PerlIO_error(fp);
891 switch (SvTYPE(sv)) {
895 if (ckWARN(WARN_UNINITIALIZED))
896 warner(WARN_UNINITIALIZED, PL_warn_uninit);
903 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
904 return !PerlIO_error(fp);
908 tmps = SvPV(sv, len);
911 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
913 return !PerlIO_error(fp);
923 if (PL_op->op_flags & OPf_REF) {
925 tmpgv = cGVOP->op_gv;
928 if (io && IoIFP(io)) {
930 sv_setpv(PL_statname,"");
931 PL_laststype = OP_STAT;
932 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
935 if (tmpgv == PL_defgv)
936 return PL_laststatval;
937 if (ckWARN(WARN_UNOPENED))
938 warner(WARN_UNOPENED, "Stat on unopened file <%s>",
941 sv_setpv(PL_statname,"");
942 return (PL_laststatval = -1);
950 if (SvTYPE(sv) == SVt_PVGV) {
954 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
955 tmpgv = (GV*)SvRV(sv);
961 sv_setpv(PL_statname, s);
962 PL_laststype = OP_STAT;
963 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
964 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
965 warner(WARN_NEWLINE, PL_warn_nl, "stat");
966 return PL_laststatval;
976 if (PL_op->op_flags & OPf_REF) {
978 if (cGVOP->op_gv == PL_defgv) {
979 if (PL_laststype != OP_LSTAT)
980 croak("The stat preceding -l _ wasn't an lstat");
981 return PL_laststatval;
983 croak("You can't use -l on a filehandle");
986 PL_laststype = OP_LSTAT;
990 sv_setpv(PL_statname,SvPV(sv, n_a));
992 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
994 PL_laststatval = PerlLIO_stat(SvPV(sv, n_a),&PL_statcache);
996 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
997 warner(WARN_NEWLINE, PL_warn_nl, "lstat");
998 return PL_laststatval;
1002 do_aexec(SV *really, register SV **mark, register SV **sp)
1010 New(401,PL_Argv, sp - mark + 1, char*);
1012 while (++mark <= sp) {
1014 *a++ = SvPVx(*mark, n_a);
1019 if (*PL_Argv[0] != '/') /* will execvp use PATH? */
1020 TAINT_ENV(); /* testing IFS here is overkill, probably */
1021 if (really && *(tmps = SvPV(really, n_a)))
1022 PerlProc_execvp(tmps,PL_Argv);
1024 PerlProc_execvp(PL_Argv[0],PL_Argv);
1025 if (ckWARN(WARN_EXEC))
1026 warner(WARN_EXEC, "Can't exec \"%s\": %s",
1027 PL_Argv[0], Strerror(errno));
1038 PL_Argv = Null(char **);
1046 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP)
1055 while (*cmd && isSPACE(*cmd))
1058 /* save an extra exec if possible */
1061 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1063 s = cmd+PL_cshlen+3;
1077 if (s[-1] == '\'') {
1079 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1087 /* see if there are shell metacharacters in it */
1089 if (*cmd == '.' && isSPACE(cmd[1]))
1092 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1095 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
1099 for (s = cmd; *s; s++) {
1100 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1101 if (*s == '\n' && !s[1]) {
1106 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1111 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1112 PL_Cmd = savepvn(cmd, s-cmd);
1114 for (s = PL_Cmd; *s;) {
1115 while (*s && isSPACE(*s)) s++;
1118 while (*s && !isSPACE(*s)) s++;
1124 PerlProc_execvp(PL_Argv[0],PL_Argv);
1125 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1131 if (ckWARN(WARN_EXEC))
1132 warner(WARN_EXEC, "Can't exec \"%s\": %s",
1133 PL_Argv[0], Strerror(errno));
1140 #endif /* OS2 || WIN32 */
1143 apply(I32 type, register SV **mark, register SV **sp)
1148 register I32 tot = 0;
1151 SV **oldmark = mark;
1154 #define APPLY_TAINT_PROPER() \
1156 if (PL_tainting && PL_tainted) { goto taint_proper_label; } \
1159 /* This is a first heuristic; it doesn't catch tainting magic. */
1161 while (++mark <= sp) {
1162 if (SvTAINTED(*mark)) {
1172 APPLY_TAINT_PROPER();
1175 APPLY_TAINT_PROPER();
1177 while (++mark <= sp) {
1178 char *name = SvPVx(*mark, n_a);
1179 APPLY_TAINT_PROPER();
1180 if (PerlLIO_chmod(name, val))
1188 APPLY_TAINT_PROPER();
1189 if (sp - mark > 2) {
1190 val = SvIVx(*++mark);
1191 val2 = SvIVx(*++mark);
1192 APPLY_TAINT_PROPER();
1194 while (++mark <= sp) {
1195 char *name = SvPVx(*mark, n_a);
1196 APPLY_TAINT_PROPER();
1197 if (PerlLIO_chown(name, val, val2))
1204 XXX Should we make lchown() directly available from perl?
1205 For now, we'll let Configure test for HAS_LCHOWN, but do
1206 nothing in the core.
1212 APPLY_TAINT_PROPER();
1215 s = SvPVx(*++mark, n_a);
1217 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1219 if (!(val = whichsig(s)))
1220 croak("Unrecognized signal name \"%s\"",s);
1224 APPLY_TAINT_PROPER();
1227 /* kill() doesn't do process groups (job trees?) under VMS */
1228 if (val < 0) val = -val;
1229 if (val == SIGKILL) {
1230 # include <starlet.h>
1231 /* Use native sys$delprc() to insure that target process is
1232 * deleted; supervisor-mode images don't pay attention to
1233 * CRTL's emulation of Unix-style signals and kill()
1235 while (++mark <= sp) {
1236 I32 proc = SvIVx(*mark);
1237 register unsigned long int __vmssts;
1238 APPLY_TAINT_PROPER();
1239 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1243 case SS$_NOSUCHNODE:
1244 SETERRNO(ESRCH,__vmssts);
1247 SETERRNO(EPERM,__vmssts);
1250 SETERRNO(EVMSERR,__vmssts);
1259 while (++mark <= sp) {
1260 I32 proc = SvIVx(*mark);
1261 APPLY_TAINT_PROPER();
1263 if (PerlProc_killpg(proc,val)) /* BSD */
1265 if (PerlProc_kill(-proc,val)) /* SYSV */
1271 while (++mark <= sp) {
1272 I32 proc = SvIVx(*mark);
1273 APPLY_TAINT_PROPER();
1274 if (PerlProc_kill(proc, val))
1282 APPLY_TAINT_PROPER();
1284 while (++mark <= sp) {
1285 s = SvPVx(*mark, n_a);
1286 APPLY_TAINT_PROPER();
1287 if (PL_euid || PL_unsafe) {
1291 else { /* don't let root wipe out directories without -U */
1293 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1295 if (PerlLIO_stat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1308 APPLY_TAINT_PROPER();
1309 if (sp - mark > 2) {
1310 #if defined(I_UTIME) || defined(VMS)
1311 struct utimbuf utbuf;
1319 Zero(&utbuf, sizeof utbuf, char);
1321 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1322 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1324 utbuf.actime = SvIVx(*++mark); /* time accessed */
1325 utbuf.modtime = SvIVx(*++mark); /* time modified */
1327 APPLY_TAINT_PROPER();
1329 while (++mark <= sp) {
1330 char *name = SvPVx(*mark, n_a);
1331 APPLY_TAINT_PROPER();
1332 if (PerlLIO_utime(name, &utbuf))
1345 return 0; /* this should never happen */
1347 #undef APPLY_TAINT_PROPER
1350 /* Do the permissions allow some operation? Assumes statcache already set. */
1351 #ifndef VMS /* VMS' cando is in vms.c */
1353 cando(I32 bit, I32 effective, register struct stat *statbufp)
1356 /* [Comments and code from Len Reed]
1357 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1358 * to write-protected files. The execute permission bit is set
1359 * by the Miscrosoft C library stat() function for the following:
1364 * All files and directories are readable.
1365 * Directories and special files, e.g. "CON", cannot be
1367 * [Comment by Tom Dinger -- a directory can have the write-protect
1368 * bit set in the file system, but DOS permits changes to
1369 * the directory anyway. In addition, all bets are off
1370 * here for networked software, such as Novell and
1374 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1375 * too so it will actually look into the files for magic numbers
1377 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1379 #else /* ! DOSISH */
1380 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1381 if (bit == S_IXUSR) {
1382 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1386 return TRUE; /* root reads and writes anything */
1389 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1390 if (statbufp->st_mode & bit)
1391 return TRUE; /* ok as "user" */
1393 else if (ingroup((I32)statbufp->st_gid,effective)) {
1394 if (statbufp->st_mode & bit >> 3)
1395 return TRUE; /* ok as "group" */
1397 else if (statbufp->st_mode & bit >> 6)
1398 return TRUE; /* ok as "other" */
1400 #endif /* ! DOSISH */
1405 ingroup(I32 testgid, I32 effective)
1407 if (testgid == (effective ? PL_egid : PL_gid))
1409 #ifdef HAS_GETGROUPS
1414 Groups_t gary[NGROUPS];
1417 anum = getgroups(NGROUPS,gary);
1419 if (gary[anum] == testgid)
1426 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1429 do_ipcget(I32 optype, SV **mark, SV **sp)
1435 key = (key_t)SvNVx(*++mark);
1436 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1437 flags = SvIVx(*++mark);
1443 return msgget(key, flags);
1447 return semget(key, n, flags);
1451 return shmget(key, n, flags);
1453 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1455 croak("%s not implemented", PL_op_desc[optype]);
1458 return -1; /* should never happen */
1462 do_ipcctl(I32 optype, SV **mark, SV **sp)
1467 I32 id, n, cmd, infosize, getinfo;
1470 id = SvIVx(*++mark);
1471 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1472 cmd = SvIVx(*++mark);
1475 getinfo = (cmd == IPC_STAT);
1481 if (cmd == IPC_STAT || cmd == IPC_SET)
1482 infosize = sizeof(struct msqid_ds);
1487 if (cmd == IPC_STAT || cmd == IPC_SET)
1488 infosize = sizeof(struct shmid_ds);
1493 if (cmd == IPC_STAT || cmd == IPC_SET)
1494 infosize = sizeof(struct semid_ds);
1495 else if (cmd == GETALL || cmd == SETALL)
1497 struct semid_ds semds;
1501 getinfo = (cmd == GETALL);
1502 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1504 infosize = semds.sem_nsems * sizeof(short);
1505 /* "short" is technically wrong but much more portable
1506 than guessing about u_?short(_t)? */
1510 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1512 croak("%s not implemented", PL_op_desc[optype]);
1521 SvPV_force(astr, len);
1522 a = SvGROW(astr, infosize+1);
1526 a = SvPV(astr, len);
1527 if (len != infosize)
1528 croak("Bad arg length for %s, is %lu, should be %ld",
1537 a = (char *)i; /* ouch */
1544 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1549 union semun unsemds;
1551 unsemds.buf = (struct semid_ds *)a;
1552 ret = Semctl(id, n, cmd, unsemds);
1558 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1562 if (getinfo && ret >= 0) {
1563 SvCUR_set(astr, infosize);
1564 *SvEND(astr) = '\0';
1571 do_msgsnd(SV **mark, SV **sp)
1577 I32 id, msize, flags;
1580 id = SvIVx(*++mark);
1582 flags = SvIVx(*++mark);
1583 mbuf = SvPV(mstr, len);
1584 if ((msize = len - sizeof(long)) < 0)
1585 croak("Arg too short for msgsnd");
1587 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1589 croak("msgsnd not implemented");
1594 do_msgrcv(SV **mark, SV **sp)
1601 I32 id, msize, flags, ret;
1604 id = SvIVx(*++mark);
1606 msize = SvIVx(*++mark);
1607 mtype = (long)SvIVx(*++mark);
1608 flags = SvIVx(*++mark);
1609 if (SvTHINKFIRST(mstr)) {
1610 if (SvREADONLY(mstr))
1611 croak("Can't msgrcv to readonly var");
1615 SvPV_force(mstr, len);
1616 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1619 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1621 SvCUR_set(mstr, sizeof(long)+ret);
1622 *SvEND(mstr) = '\0';
1626 croak("msgrcv not implemented");
1631 do_semop(SV **mark, SV **sp)
1640 id = SvIVx(*++mark);
1642 opbuf = SvPV(opstr, opsize);
1643 if (opsize < sizeof(struct sembuf)
1644 || (opsize % sizeof(struct sembuf)) != 0) {
1645 SETERRNO(EINVAL,LIB$_INVARG);
1649 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1651 croak("semop not implemented");
1656 do_shmio(I32 optype, SV **mark, SV **sp)
1662 I32 id, mpos, msize;
1664 struct shmid_ds shmds;
1666 id = SvIVx(*++mark);
1668 mpos = SvIVx(*++mark);
1669 msize = SvIVx(*++mark);
1671 if (shmctl(id, IPC_STAT, &shmds) == -1)
1673 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1674 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1677 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1678 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1680 if (optype == OP_SHMREAD) {
1681 SvPV_force(mstr, len);
1682 mbuf = SvGROW(mstr, msize+1);
1684 Copy(shm + mpos, mbuf, msize, char);
1685 SvCUR_set(mstr, msize);
1686 *SvEND(mstr) = '\0';
1692 mbuf = SvPV(mstr, len);
1693 if ((n = len) > msize)
1695 Copy(mbuf, shm + mpos, n, char);
1697 memzero(shm + mpos + n, msize - n);
1701 croak("shm I/O not implemented");
1705 #endif /* SYSV IPC */