3 * Copyright (c) 1991-1999, 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)
29 # ifndef HAS_SHMAT_PROTOTYPE
30 extern Shmat_t shmat _((int, char *, int));
36 # if defined(_MSC_VER) || defined(__MINGW32__)
37 # include <sys/utime.h>
50 # define OPEN_EXCL O_EXCL
55 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
59 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
64 #if defined(HAS_SOCKET) && !defined(VMS) /* VMS handles sockets via vmsish.h */
65 # include <sys/socket.h>
69 # include <net/errno.h>
74 /* Put this after #includes because <unistd.h> defines _XOPEN_*. */
76 # if _XOPEN_VERSION >= 5 || defined(_XOPEN_SOURCE_EXTENDED) || defined(__GLIBC__)
77 # define Sock_size_t Size_t
79 # define Sock_size_t int
84 do_open(GV *gv, register char *name, I32 len, int as_raw, int rawmode, int rawperm, PerlIO *supplied_fp)
86 register IO *io = GvIOn(gv);
87 PerlIO *saveifp = Nullfp;
88 PerlIO *saveofp = Nullfp;
94 bool was_fdopen = FALSE;
96 PL_forkprocess = 1; /* assume true if no fork */
99 fd = PerlIO_fileno(IoIFP(io));
100 if (IoTYPE(io) == '-')
102 else if (fd <= PL_maxsysfd) {
105 savetype = IoTYPE(io);
108 else if (IoTYPE(io) == '|')
109 result = PerlProc_pclose(IoIFP(io));
110 else if (IoIFP(io) != IoOFP(io)) {
112 result = PerlIO_close(IoOFP(io));
113 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
116 result = PerlIO_close(IoIFP(io));
119 result = PerlIO_close(IoIFP(io));
120 if (result == EOF && fd > PL_maxsysfd)
121 PerlIO_printf(PerlIO_stderr(), "Warning: unable to close filehandle %s properly.\n",
123 IoOFP(io) = IoIFP(io) = Nullfp;
127 #if defined(O_LARGEFILE)
128 rawmode |= O_LARGEFILE;
132 #define O_ACCMODE 3 /* Assume traditional implementation */
135 switch (result = rawmode & O_ACCMODE) {
148 writing = (result > 0);
149 fd = PerlLIO_open3(name, rawmode, rawperm);
155 if (result == O_RDONLY)
158 else if (rawmode & O_APPEND)
159 fpmode = (result == O_WRONLY) ? "a" : "a+";
162 fpmode = (result == O_WRONLY) ? "w" : "r+";
163 fp = PerlIO_fdopen(fd, fpmode);
170 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
173 myname = savepvn(name, len);
176 while (len && isSPACE(name[len-1]))
179 mode[0] = mode[1] = mode[2] = '\0';
181 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
189 for (name++; isSPACE(*name); name++) ;
190 if (*name == '\0') { /* command is missing 19990114 */
192 if (ckWARN(WARN_PIPE))
193 warner(WARN_PIPE, "Missing command in piped open");
199 TAINT_PROPER("piped open");
200 if (name[strlen(name)-1] == '|') {
202 name[strlen(name)-1] = '\0' ;
203 if (ckWARN(WARN_PIPE))
204 warner(WARN_PIPE, "Can't do bidirectional pipe");
206 fp = PerlProc_popen(name,"w");
209 else if (*name == '>') {
210 TAINT_PROPER("open");
213 mode[0] = IoTYPE(io) = 'a';
228 if (!*name && supplied_fp)
232 for (; isSPACE(*name); name++) ;
237 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
241 SETERRNO(EINVAL,SS$_IVCHAN);
246 fd = PerlIO_fileno(IoIFP(thatio));
247 if (IoTYPE(thatio) == 's')
254 fd = PerlLIO_dup(fd);
257 if (!(fp = PerlIO_fdopen(fd,mode))) {
265 for (; isSPACE(*name); name++) ;
266 if (strEQ(name,"-")) {
267 fp = PerlIO_stdout();
271 fp = PerlIO_open(name,mode);
275 else if (*name == '<') {
277 for (name++; isSPACE(*name); name++) ;
281 if (strEQ(name,"-")) {
286 fp = PerlIO_open(name,mode);
288 else if (len > 1 && name[len-1] == '|') {
290 while (len && isSPACE(name[len-1]))
293 for (; isSPACE(*name); name++) ;
294 if (*name == '\0') { /* command is missing 19990114 */
296 if (ckWARN(WARN_PIPE))
297 warner(WARN_PIPE, "Missing command in piped open");
303 TAINT_PROPER("piped open");
304 fp = PerlProc_popen(name,"r");
310 for (; isSPACE(*name); name++) ;
311 if (strEQ(name,"-")) {
316 fp = PerlIO_open(name,"r");
321 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == '<' && strchr(name, '\n'))
322 warner(WARN_NEWLINE, PL_warn_nl, "open");
326 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
328 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
329 (void)PerlIO_close(fp);
332 if (S_ISSOCK(PL_statbuf.st_mode))
333 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
337 !(PL_statbuf.st_mode & S_IFMT)
343 Sock_size_t buflen = sizeof tmpbuf;
344 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
346 || errno != ENOTSOCK)
347 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
348 /* but some return 0 for streams too, sigh */
352 if (saveifp) { /* must use old fp? */
353 fd = PerlIO_fileno(saveifp);
355 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
356 if (saveofp != saveifp) { /* was a socket? */
357 PerlIO_close(saveofp);
362 if (fd != PerlIO_fileno(fp)) {
366 PerlLIO_dup2(PerlIO_fileno(fp), fd);
367 sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
368 (void)SvUPGRADE(sv, SVt_IV);
371 sv = *av_fetch(PL_fdpid,fd,TRUE);
372 (void)SvUPGRADE(sv, SVt_IV);
381 #if defined(HAS_FCNTL) && defined(F_SETFD)
383 int save_errno = errno;
384 fd = PerlIO_fileno(fp);
385 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
392 if (IoTYPE(io) == 's'
393 || (IoTYPE(io) == '>' && S_ISCHR(PL_statbuf.st_mode)) ) {
394 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
408 IoTYPE(io) = savetype;
413 nextargv(register GV *gv)
416 #ifndef FLEXFILENAMES
424 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
425 if (PL_filemode & (S_ISUID|S_ISGID)) {
426 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
428 (void)fchmod(PL_lastfd,PL_filemode);
430 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
434 while (av_len(GvAV(gv)) >= 0) {
437 sv = av_shift(GvAV(gv));
439 sv_setsv(GvSV(gv),sv);
440 SvSETMAGIC(GvSV(gv));
441 PL_oldname = SvPVx(GvSV(gv), oldlen);
442 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
444 TAINT_PROPER("inplace open");
445 if (oldlen == 1 && *PL_oldname == '-') {
446 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
447 return IoIFP(GvIOp(gv));
449 #ifndef FLEXFILENAMES
450 filedev = PL_statbuf.st_dev;
451 fileino = PL_statbuf.st_ino;
453 PL_filemode = PL_statbuf.st_mode;
454 fileuid = PL_statbuf.st_uid;
455 filegid = PL_statbuf.st_gid;
456 if (!S_ISREG(PL_filemode)) {
457 warn("Can't do inplace edit: %s is not a regular file",
463 char *star = strchr(PL_inplace, '*');
465 char *begin = PL_inplace;
466 sv_setpvn(sv, "", 0);
468 sv_catpvn(sv, begin, star - begin);
469 sv_catpvn(sv, PL_oldname, oldlen);
471 } while ((star = strchr(begin, '*')));
476 sv_catpv(sv,PL_inplace);
478 #ifndef FLEXFILENAMES
479 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
480 && PL_statbuf.st_dev == filedev
481 && PL_statbuf.st_ino == fileino
483 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
486 warn("Can't do inplace edit: %s would not be unique",
494 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
495 warn("Can't rename %s to %s: %s, skipping file",
496 PL_oldname, SvPVX(sv), Strerror(errno) );
502 (void)PerlLIO_unlink(SvPVX(sv));
503 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
504 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
507 (void)UNLINK(SvPVX(sv));
508 if (link(PL_oldname,SvPVX(sv)) < 0) {
509 warn("Can't rename %s to %s: %s, skipping file",
510 PL_oldname, SvPVX(sv), Strerror(errno) );
514 (void)UNLINK(PL_oldname);
518 #if !defined(DOSISH) && !defined(AMIGAOS)
519 # ifndef VMS /* Don't delete; use automatic file versioning */
520 if (UNLINK(PL_oldname) < 0) {
521 warn("Can't remove %s: %s, skipping file",
522 PL_oldname, Strerror(errno) );
528 croak("Can't do inplace edit without backup");
532 sv_setpvn(sv,">",!PL_inplace);
533 sv_catpvn(sv,PL_oldname,oldlen);
534 SETERRNO(0,0); /* in case sprintf set errno */
536 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
537 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp)) {
539 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
540 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) {
542 warn("Can't do inplace edit on %s: %s",
543 PL_oldname, Strerror(errno) );
547 setdefout(PL_argvoutgv);
548 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
549 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
551 (void)fchmod(PL_lastfd,PL_filemode);
553 # if !(defined(WIN32) && defined(__BORLANDC__))
554 /* Borland runtime creates a readonly file! */
555 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
558 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
560 (void)fchown(PL_lastfd,fileuid,filegid);
563 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
568 return IoIFP(GvIOp(gv));
571 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",
572 SvPV(sv, oldlen), Strerror(errno));
575 (void)do_close(PL_argvoutgv,FALSE);
576 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
583 do_pipe(SV *sv, GV *rgv, GV *wgv)
602 if (PerlProc_pipe(fd) < 0)
604 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
605 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
606 IoIFP(wstio) = IoOFP(wstio);
609 if (!IoIFP(rstio) || !IoOFP(wstio)) {
610 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
611 else PerlLIO_close(fd[0]);
612 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
613 else PerlLIO_close(fd[1]);
617 sv_setsv(sv,&PL_sv_yes);
621 sv_setsv(sv,&PL_sv_undef);
626 /* explicit renamed to avoid C++ conflict -- kja */
628 do_close(GV *gv, bool not_implicit)
635 if (!gv || SvTYPE(gv) != SVt_PVGV) {
637 SETERRNO(EBADF,SS$_IVCHAN);
641 if (!io) { /* never opened */
644 if (ckWARN(WARN_UNOPENED))
645 warner(WARN_UNOPENED,
646 "Close on unopened file <%s>",GvENAME(gv));
647 SETERRNO(EBADF,SS$_IVCHAN);
651 retval = io_close(io);
655 IoLINES_LEFT(io) = IoPAGE_LEN(io);
668 if (IoTYPE(io) == '|') {
669 status = PerlProc_pclose(IoIFP(io));
670 STATUS_NATIVE_SET(status);
671 retval = (STATUS_POSIX == 0);
673 else if (IoTYPE(io) == '-')
676 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
677 retval = (PerlIO_close(IoOFP(io)) != EOF);
678 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
681 retval = (PerlIO_close(IoIFP(io)) != EOF);
683 IoOFP(io) = IoIFP(io) = Nullfp;
686 SETERRNO(EBADF,SS$_IVCHAN);
706 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
707 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
708 return FALSE; /* this is the most usual case */
711 ch = PerlIO_getc(IoIFP(io));
713 (void)PerlIO_ungetc(IoIFP(io),ch);
716 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
717 if (PerlIO_get_cnt(IoIFP(io)) < -1)
718 PerlIO_set_cnt(IoIFP(io),-1);
720 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
721 if (!nextargv(PL_argvgv)) /* get another fp handy */
725 return TRUE; /* normal fp, definitely end of file */
736 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
737 #ifdef ULTRIX_STDIO_BOTCH
739 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
741 return PerlIO_tell(fp);
745 if (ckWARN(WARN_UNOPENED))
746 warner(WARN_UNOPENED, "tell() on unopened file");
748 SETERRNO(EBADF,RMS$_IFI);
753 do_seek(GV *gv, Off_t pos, int whence)
758 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
759 #ifdef ULTRIX_STDIO_BOTCH
761 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
763 return PerlIO_seek(fp, pos, whence) >= 0;
767 if (ckWARN(WARN_UNOPENED))
768 warner(WARN_UNOPENED, "seek() on unopened file");
770 SETERRNO(EBADF,RMS$_IFI);
775 do_sysseek(GV *gv, Off_t pos, int whence)
780 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
781 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
784 if (ckWARN(WARN_UNOPENED))
785 warner(WARN_UNOPENED, "sysseek() on unopened file");
787 SETERRNO(EBADF,RMS$_IFI);
792 do_binmode(PerlIO *fp, int iotype, int flag)
795 croak("panic: unsetting binmode"); /* Not implemented yet */
797 #if defined(atarist) || defined(__MINT__)
798 if (!PerlIO_flush(fp) && (fp->_flag |= _IOBIN))
803 if (PerlLIO_setmode(PerlIO_fileno(fp), OP_BINARY) != -1) {
804 #if defined(WIN32) && defined(__BORLANDC__)
805 /* The translation mode of the stream is maintained independent
806 * of the translation mode of the fd in the Borland RTL (heavy
807 * digging through their runtime sources reveal). User has to
808 * set the mode explicitly for the stream (though they don't
809 * document this anywhere). GSAR 97-5-24
811 PerlIO_seek(fp,0L,0);
812 ((FILE*)fp)->flags |= _F_BIN;
820 #if defined(USEMYBINMODE)
821 if (my_binmode(fp,iotype) != NULL)
831 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
832 /* code courtesy of William Kucharski */
835 I32 my_chsize(fd, length)
836 I32 fd; /* file descriptor */
837 Off_t length; /* length to set file to */
842 if (PerlLIO_fstat(fd, &filebuf) < 0)
845 if (filebuf.st_size < length) {
847 /* extend file length */
849 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
852 /* write a "0" byte */
854 if ((PerlLIO_write(fd, "", 1)) != 1)
858 /* truncate length */
863 fl.l_type = F_WRLCK; /* write lock on file space */
866 * This relies on the UNDOCUMENTED F_FREESP argument to
867 * fcntl(2), which truncates the file so that it ends at the
868 * position indicated by fl.l_start.
870 * Will minor miracles never cease?
873 if (fcntl(fd, F_FREESP, &fl) < 0)
880 #endif /* F_FREESP */
883 do_print(register SV *sv, PerlIO *fp)
888 /* assuming fp is checked earlier */
894 if (SvIOK(sv) && SvIVX(sv) != 0) {
895 PerlIO_printf(fp, PL_ofmt, (double)SvIVX(sv));
896 return !PerlIO_error(fp);
898 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
899 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
900 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
901 return !PerlIO_error(fp);
904 switch (SvTYPE(sv)) {
908 if (ckWARN(WARN_UNINITIALIZED))
909 warner(WARN_UNINITIALIZED, PL_warn_uninit);
916 if (SvIsUV(sv)) /* XXXX 64-bit? */
917 PerlIO_printf(fp, "%lu", (unsigned long)SvUVX(sv));
919 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
920 return !PerlIO_error(fp);
924 tmps = SvPV(sv, len);
927 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
929 return !PerlIO_error(fp);
939 if (PL_op->op_flags & OPf_REF) {
941 tmpgv = cGVOP->op_gv;
944 if (io && IoIFP(io)) {
946 sv_setpv(PL_statname,"");
947 PL_laststype = OP_STAT;
948 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
951 if (tmpgv == PL_defgv)
952 return PL_laststatval;
953 if (ckWARN(WARN_UNOPENED))
954 warner(WARN_UNOPENED, "Stat on unopened file <%s>",
957 sv_setpv(PL_statname,"");
958 return (PL_laststatval = -1);
966 if (SvTYPE(sv) == SVt_PVGV) {
970 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
971 tmpgv = (GV*)SvRV(sv);
977 sv_setpv(PL_statname, s);
978 PL_laststype = OP_STAT;
979 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
980 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
981 warner(WARN_NEWLINE, PL_warn_nl, "stat");
982 return PL_laststatval;
992 if (PL_op->op_flags & OPf_REF) {
994 if (cGVOP->op_gv == PL_defgv) {
995 if (PL_laststype != OP_LSTAT)
996 croak("The stat preceding -l _ wasn't an lstat");
997 return PL_laststatval;
999 croak("You can't use -l on a filehandle");
1002 PL_laststype = OP_LSTAT;
1006 sv_setpv(PL_statname,SvPV(sv, n_a));
1008 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
1010 PL_laststatval = PerlLIO_stat(SvPV(sv, n_a),&PL_statcache);
1012 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
1013 warner(WARN_NEWLINE, PL_warn_nl, "lstat");
1014 return PL_laststatval;
1018 do_aexec(SV *really, register SV **mark, register SV **sp)
1026 New(401,PL_Argv, sp - mark + 1, char*);
1028 while (++mark <= sp) {
1030 *a++ = SvPVx(*mark, n_a);
1035 if (*PL_Argv[0] != '/') /* will execvp use PATH? */
1036 TAINT_ENV(); /* testing IFS here is overkill, probably */
1037 if (really && *(tmps = SvPV(really, n_a)))
1038 PerlProc_execvp(tmps,PL_Argv);
1040 PerlProc_execvp(PL_Argv[0],PL_Argv);
1041 if (ckWARN(WARN_EXEC))
1042 warner(WARN_EXEC, "Can't exec \"%s\": %s",
1043 PL_Argv[0], Strerror(errno));
1054 PL_Argv = Null(char **);
1062 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP)
1067 return do_exec3(cmd,0,0);
1071 do_exec3(char *cmd, int fd, int do_report)
1077 while (*cmd && isSPACE(*cmd))
1080 /* save an extra exec if possible */
1083 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1085 s = cmd+PL_cshlen+3;
1099 if (s[-1] == '\'') {
1101 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1109 /* see if there are shell metacharacters in it */
1111 if (*cmd == '.' && isSPACE(cmd[1]))
1114 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1117 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
1121 for (s = cmd; *s; s++) {
1122 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1123 if (*s == '\n' && !s[1]) {
1128 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1133 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1134 PL_Cmd = savepvn(cmd, s-cmd);
1136 for (s = PL_Cmd; *s;) {
1137 while (*s && isSPACE(*s)) s++;
1140 while (*s && !isSPACE(*s)) s++;
1146 PerlProc_execvp(PL_Argv[0],PL_Argv);
1147 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1155 if (ckWARN(WARN_EXEC))
1156 warner(WARN_EXEC, "Can't exec \"%s\": %s",
1157 PL_Argv[0], Strerror(errno));
1159 PerlLIO_write(fd, (void*)&e, sizeof(int));
1168 #endif /* OS2 || WIN32 */
1171 apply(I32 type, register SV **mark, register SV **sp)
1176 register I32 tot = 0;
1179 SV **oldmark = mark;
1182 #define APPLY_TAINT_PROPER() \
1184 if (PL_tainted) { TAINT_PROPER(what); } \
1187 /* This is a first heuristic; it doesn't catch tainting magic. */
1189 while (++mark <= sp) {
1190 if (SvTAINTED(*mark)) {
1200 APPLY_TAINT_PROPER();
1203 APPLY_TAINT_PROPER();
1205 while (++mark <= sp) {
1206 char *name = SvPVx(*mark, n_a);
1207 APPLY_TAINT_PROPER();
1208 if (PerlLIO_chmod(name, val))
1216 APPLY_TAINT_PROPER();
1217 if (sp - mark > 2) {
1218 val = SvIVx(*++mark);
1219 val2 = SvIVx(*++mark);
1220 APPLY_TAINT_PROPER();
1222 while (++mark <= sp) {
1223 char *name = SvPVx(*mark, n_a);
1224 APPLY_TAINT_PROPER();
1225 if (PerlLIO_chown(name, val, val2))
1232 XXX Should we make lchown() directly available from perl?
1233 For now, we'll let Configure test for HAS_LCHOWN, but do
1234 nothing in the core.
1240 APPLY_TAINT_PROPER();
1243 s = SvPVx(*++mark, n_a);
1245 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1247 if (!(val = whichsig(s)))
1248 croak("Unrecognized signal name \"%s\"",s);
1252 APPLY_TAINT_PROPER();
1255 /* kill() doesn't do process groups (job trees?) under VMS */
1256 if (val < 0) val = -val;
1257 if (val == SIGKILL) {
1258 # include <starlet.h>
1259 /* Use native sys$delprc() to insure that target process is
1260 * deleted; supervisor-mode images don't pay attention to
1261 * CRTL's emulation of Unix-style signals and kill()
1263 while (++mark <= sp) {
1264 I32 proc = SvIVx(*mark);
1265 register unsigned long int __vmssts;
1266 APPLY_TAINT_PROPER();
1267 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1271 case SS$_NOSUCHNODE:
1272 SETERRNO(ESRCH,__vmssts);
1275 SETERRNO(EPERM,__vmssts);
1278 SETERRNO(EVMSERR,__vmssts);
1287 while (++mark <= sp) {
1288 I32 proc = SvIVx(*mark);
1289 APPLY_TAINT_PROPER();
1291 if (PerlProc_killpg(proc,val)) /* BSD */
1293 if (PerlProc_kill(-proc,val)) /* SYSV */
1299 while (++mark <= sp) {
1300 I32 proc = SvIVx(*mark);
1301 APPLY_TAINT_PROPER();
1302 if (PerlProc_kill(proc, val))
1310 APPLY_TAINT_PROPER();
1312 while (++mark <= sp) {
1313 s = SvPVx(*mark, n_a);
1314 APPLY_TAINT_PROPER();
1315 if (PL_euid || PL_unsafe) {
1319 else { /* don't let root wipe out directories without -U */
1321 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1323 if (PerlLIO_stat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1336 APPLY_TAINT_PROPER();
1337 if (sp - mark > 2) {
1338 #if defined(I_UTIME) || defined(VMS)
1339 struct utimbuf utbuf;
1347 Zero(&utbuf, sizeof utbuf, char);
1349 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1350 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1352 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1353 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
1355 APPLY_TAINT_PROPER();
1357 while (++mark <= sp) {
1358 char *name = SvPVx(*mark, n_a);
1359 APPLY_TAINT_PROPER();
1360 if (PerlLIO_utime(name, &utbuf))
1371 #undef APPLY_TAINT_PROPER
1374 /* Do the permissions allow some operation? Assumes statcache already set. */
1375 #ifndef VMS /* VMS' cando is in vms.c */
1377 cando(I32 bit, I32 effective, register struct stat *statbufp)
1380 /* [Comments and code from Len Reed]
1381 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1382 * to write-protected files. The execute permission bit is set
1383 * by the Miscrosoft C library stat() function for the following:
1388 * All files and directories are readable.
1389 * Directories and special files, e.g. "CON", cannot be
1391 * [Comment by Tom Dinger -- a directory can have the write-protect
1392 * bit set in the file system, but DOS permits changes to
1393 * the directory anyway. In addition, all bets are off
1394 * here for networked software, such as Novell and
1398 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1399 * too so it will actually look into the files for magic numbers
1401 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1403 #else /* ! DOSISH */
1404 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1405 if (bit == S_IXUSR) {
1406 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1410 return TRUE; /* root reads and writes anything */
1413 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1414 if (statbufp->st_mode & bit)
1415 return TRUE; /* ok as "user" */
1417 else if (ingroup((I32)statbufp->st_gid,effective)) {
1418 if (statbufp->st_mode & bit >> 3)
1419 return TRUE; /* ok as "group" */
1421 else if (statbufp->st_mode & bit >> 6)
1422 return TRUE; /* ok as "other" */
1424 #endif /* ! DOSISH */
1429 ingroup(I32 testgid, I32 effective)
1431 if (testgid == (effective ? PL_egid : PL_gid))
1433 #ifdef HAS_GETGROUPS
1438 Groups_t gary[NGROUPS];
1441 anum = getgroups(NGROUPS,gary);
1443 if (gary[anum] == testgid)
1450 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1453 do_ipcget(I32 optype, SV **mark, SV **sp)
1459 key = (key_t)SvNVx(*++mark);
1460 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1461 flags = SvIVx(*++mark);
1467 return msgget(key, flags);
1471 return semget(key, n, flags);
1475 return shmget(key, n, flags);
1477 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1479 croak("%s not implemented", PL_op_desc[optype]);
1482 return -1; /* should never happen */
1486 do_ipcctl(I32 optype, SV **mark, SV **sp)
1491 I32 id, n, cmd, infosize, getinfo;
1494 id = SvIVx(*++mark);
1495 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1496 cmd = SvIVx(*++mark);
1499 getinfo = (cmd == IPC_STAT);
1505 if (cmd == IPC_STAT || cmd == IPC_SET)
1506 infosize = sizeof(struct msqid_ds);
1511 if (cmd == IPC_STAT || cmd == IPC_SET)
1512 infosize = sizeof(struct shmid_ds);
1518 if (cmd == IPC_STAT || cmd == IPC_SET)
1519 infosize = sizeof(struct semid_ds);
1520 else if (cmd == GETALL || cmd == SETALL)
1522 struct semid_ds semds;
1526 getinfo = (cmd == GETALL);
1527 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1529 infosize = semds.sem_nsems * sizeof(short);
1530 /* "short" is technically wrong but much more portable
1531 than guessing about u_?short(_t)? */
1534 croak("%s not implemented", PL_op_desc[optype]);
1538 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1540 croak("%s not implemented", PL_op_desc[optype]);
1549 SvPV_force(astr, len);
1550 a = SvGROW(astr, infosize+1);
1554 a = SvPV(astr, len);
1555 if (len != infosize)
1556 croak("Bad arg length for %s, is %lu, should be %ld",
1565 a = (char *)i; /* ouch */
1572 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1578 union semun unsemds;
1580 unsemds.buf = (struct semid_ds *)a;
1581 ret = Semctl(id, n, cmd, unsemds);
1583 croak("%s not implemented", PL_op_desc[optype]);
1590 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1594 if (getinfo && ret >= 0) {
1595 SvCUR_set(astr, infosize);
1596 *SvEND(astr) = '\0';
1603 do_msgsnd(SV **mark, SV **sp)
1609 I32 id, msize, flags;
1612 id = SvIVx(*++mark);
1614 flags = SvIVx(*++mark);
1615 mbuf = SvPV(mstr, len);
1616 if ((msize = len - sizeof(long)) < 0)
1617 croak("Arg too short for msgsnd");
1619 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1621 croak("msgsnd not implemented");
1626 do_msgrcv(SV **mark, SV **sp)
1633 I32 id, msize, flags, ret;
1636 id = SvIVx(*++mark);
1638 msize = SvIVx(*++mark);
1639 mtype = (long)SvIVx(*++mark);
1640 flags = SvIVx(*++mark);
1641 SvPV_force(mstr, len);
1642 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1645 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1647 SvCUR_set(mstr, sizeof(long)+ret);
1648 *SvEND(mstr) = '\0';
1652 croak("msgrcv not implemented");
1657 do_semop(SV **mark, SV **sp)
1666 id = SvIVx(*++mark);
1668 opbuf = SvPV(opstr, opsize);
1669 if (opsize < sizeof(struct sembuf)
1670 || (opsize % sizeof(struct sembuf)) != 0) {
1671 SETERRNO(EINVAL,LIB$_INVARG);
1675 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1677 croak("semop not implemented");
1682 do_shmio(I32 optype, SV **mark, SV **sp)
1688 I32 id, mpos, msize;
1690 struct shmid_ds shmds;
1692 id = SvIVx(*++mark);
1694 mpos = SvIVx(*++mark);
1695 msize = SvIVx(*++mark);
1697 if (shmctl(id, IPC_STAT, &shmds) == -1)
1699 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1700 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1703 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1704 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1706 if (optype == OP_SHMREAD) {
1707 SvPV_force(mstr, len);
1708 mbuf = SvGROW(mstr, msize+1);
1710 Copy(shm + mpos, mbuf, msize, char);
1711 SvCUR_set(mstr, msize);
1712 *SvEND(mstr) = '\0';
1718 mbuf = SvPV(mstr, len);
1719 if ((n = len) > msize)
1721 Copy(mbuf, shm + mpos, n, char);
1723 memzero(shm + mpos + n, msize - n);
1727 croak("shm I/O not implemented");
1731 #endif /* SYSV IPC */