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."
18 #define PERL_IN_DOIO_C
21 #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>
67 # if defined(USE_SOCKS) && defined(I_SOCKS)
75 # include <net/errno.h>
80 /* Put this after #includes because <unistd.h> defines _XOPEN_*. */
82 # if _XOPEN_VERSION >= 5 || defined(_XOPEN_SOURCE_EXTENDED) || defined(__GLIBC__)
83 # define Sock_size_t Size_t
85 # define Sock_size_t int
90 Perl_do_open(pTHX_ GV *gv, register char *name, I32 len, int as_raw, int rawmode, int rawperm, PerlIO *supplied_fp)
92 register IO *io = GvIOn(gv);
93 PerlIO *saveifp = Nullfp;
94 PerlIO *saveofp = Nullfp;
100 bool was_fdopen = FALSE;
102 PL_forkprocess = 1; /* assume true if no fork */
105 fd = PerlIO_fileno(IoIFP(io));
106 if (IoTYPE(io) == '-')
108 else if (fd <= PL_maxsysfd) {
111 savetype = IoTYPE(io);
114 else if (IoTYPE(io) == '|')
115 result = PerlProc_pclose(IoIFP(io));
116 else if (IoIFP(io) != IoOFP(io)) {
118 result = PerlIO_close(IoOFP(io));
119 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
122 result = PerlIO_close(IoIFP(io));
125 result = PerlIO_close(IoIFP(io));
126 if (result == EOF && fd > PL_maxsysfd)
127 PerlIO_printf(PerlIO_stderr(), "Warning: unable to close filehandle %s properly.\n",
129 IoOFP(io) = IoIFP(io) = Nullfp;
133 #if defined(O_LARGEFILE)
134 rawmode |= O_LARGEFILE;
138 #define O_ACCMODE 3 /* Assume traditional implementation */
141 switch (result = rawmode & O_ACCMODE) {
154 writing = (result > 0);
155 fd = PerlLIO_open3(name, rawmode, rawperm);
161 if (result == O_RDONLY)
164 else if (rawmode & O_APPEND)
165 fpmode = (result == O_WRONLY) ? "a" : "a+";
168 fpmode = (result == O_WRONLY) ? "w" : "r+";
169 fp = PerlIO_fdopen(fd, fpmode);
176 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
179 myname = savepvn(name, len);
182 while (len && isSPACE(name[len-1]))
185 mode[0] = mode[1] = mode[2] = '\0';
187 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
195 for (name++; isSPACE(*name); name++) ;
196 if (*name == '\0') { /* command is missing 19990114 */
198 if (ckWARN(WARN_PIPE))
199 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
205 TAINT_PROPER("piped open");
206 if (name[strlen(name)-1] == '|') {
208 name[strlen(name)-1] = '\0' ;
209 if (ckWARN(WARN_PIPE))
210 Perl_warner(aTHX_ WARN_PIPE, "Can't do bidirectional pipe");
212 fp = PerlProc_popen(name,"w");
215 else if (*name == '>') {
216 TAINT_PROPER("open");
219 mode[0] = IoTYPE(io) = 'a';
234 if (!*name && supplied_fp)
238 for (; isSPACE(*name); name++) ;
243 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
247 SETERRNO(EINVAL,SS$_IVCHAN);
252 fd = PerlIO_fileno(IoIFP(thatio));
253 if (IoTYPE(thatio) == 's')
260 fd = PerlLIO_dup(fd);
263 if (!(fp = PerlIO_fdopen(fd,mode))) {
271 for (; isSPACE(*name); name++) ;
272 if (strEQ(name,"-")) {
273 fp = PerlIO_stdout();
277 fp = PerlIO_open(name,mode);
281 else if (*name == '<') {
283 for (name++; isSPACE(*name); name++) ;
287 if (strEQ(name,"-")) {
292 fp = PerlIO_open(name,mode);
294 else if (len > 1 && name[len-1] == '|') {
296 while (len && isSPACE(name[len-1]))
299 for (; isSPACE(*name); name++) ;
300 if (*name == '\0') { /* command is missing 19990114 */
302 if (ckWARN(WARN_PIPE))
303 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
309 TAINT_PROPER("piped open");
310 fp = PerlProc_popen(name,"r");
316 for (; isSPACE(*name); name++) ;
317 if (strEQ(name,"-")) {
322 fp = PerlIO_open(name,"r");
327 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == '<' && strchr(name, '\n'))
328 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
332 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
334 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
335 (void)PerlIO_close(fp);
338 if (S_ISSOCK(PL_statbuf.st_mode))
339 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
343 !(PL_statbuf.st_mode & S_IFMT)
349 Sock_size_t buflen = sizeof tmpbuf;
350 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
352 || errno != ENOTSOCK)
353 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
354 /* but some return 0 for streams too, sigh */
358 if (saveifp) { /* must use old fp? */
359 fd = PerlIO_fileno(saveifp);
361 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
362 if (saveofp != saveifp) { /* was a socket? */
363 PerlIO_close(saveofp);
368 if (fd != PerlIO_fileno(fp)) {
372 PerlLIO_dup2(PerlIO_fileno(fp), fd);
373 sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
374 (void)SvUPGRADE(sv, SVt_IV);
377 sv = *av_fetch(PL_fdpid,fd,TRUE);
378 (void)SvUPGRADE(sv, SVt_IV);
387 #if defined(HAS_FCNTL) && defined(F_SETFD)
389 int save_errno = errno;
390 fd = PerlIO_fileno(fp);
391 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
398 if (IoTYPE(io) == 's'
399 || (IoTYPE(io) == '>' && S_ISCHR(PL_statbuf.st_mode)) ) {
400 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
414 IoTYPE(io) = savetype;
419 Perl_nextargv(pTHX_ register GV *gv)
422 #ifndef FLEXFILENAMES
430 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
431 if (PL_filemode & (S_ISUID|S_ISGID)) {
432 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
434 (void)fchmod(PL_lastfd,PL_filemode);
436 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
440 while (av_len(GvAV(gv)) >= 0) {
443 sv = av_shift(GvAV(gv));
445 sv_setsv(GvSV(gv),sv);
446 SvSETMAGIC(GvSV(gv));
447 PL_oldname = SvPVx(GvSV(gv), oldlen);
448 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
450 TAINT_PROPER("inplace open");
451 if (oldlen == 1 && *PL_oldname == '-') {
452 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
453 return IoIFP(GvIOp(gv));
455 #ifndef FLEXFILENAMES
456 filedev = PL_statbuf.st_dev;
457 fileino = PL_statbuf.st_ino;
459 PL_filemode = PL_statbuf.st_mode;
460 fileuid = PL_statbuf.st_uid;
461 filegid = PL_statbuf.st_gid;
462 if (!S_ISREG(PL_filemode)) {
463 if (ckWARN_d(WARN_INPLACE))
464 Perl_warner(aTHX_ WARN_INPLACE,
465 "Can't do inplace edit: %s is not a regular file",
471 char *star = strchr(PL_inplace, '*');
473 char *begin = PL_inplace;
474 sv_setpvn(sv, "", 0);
476 sv_catpvn(sv, begin, star - begin);
477 sv_catpvn(sv, PL_oldname, oldlen);
479 } while ((star = strchr(begin, '*')));
484 sv_catpv(sv,PL_inplace);
486 #ifndef FLEXFILENAMES
487 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
488 && PL_statbuf.st_dev == filedev
489 && PL_statbuf.st_ino == fileino
491 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
494 if (ckWARN_d(WARN_INPLACE))
495 Perl_warner(aTHX_ WARN_INPLACE,
496 "Can't do inplace edit: %s would not be unique",
504 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
505 if (ckWARN_d(WARN_INPLACE))
506 Perl_warner(aTHX_ WARN_INPLACE,
507 "Can't rename %s to %s: %s, skipping file",
508 PL_oldname, SvPVX(sv), Strerror(errno) );
514 (void)PerlLIO_unlink(SvPVX(sv));
515 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
516 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
519 (void)UNLINK(SvPVX(sv));
520 if (link(PL_oldname,SvPVX(sv)) < 0) {
521 if (ckWARN_d(WARN_INPLACE))
522 Perl_warner(aTHX_ WARN_INPLACE,
523 "Can't rename %s to %s: %s, skipping file",
524 PL_oldname, SvPVX(sv), Strerror(errno) );
528 (void)UNLINK(PL_oldname);
532 #if !defined(DOSISH) && !defined(AMIGAOS)
533 # ifndef VMS /* Don't delete; use automatic file versioning */
534 if (UNLINK(PL_oldname) < 0) {
535 if (ckWARN_d(WARN_INPLACE))
536 Perl_warner(aTHX_ WARN_INPLACE,
537 "Can't remove %s: %s, skipping file",
538 PL_oldname, Strerror(errno) );
544 Perl_croak(aTHX_ "Can't do inplace edit without backup");
548 sv_setpvn(sv,">",!PL_inplace);
549 sv_catpvn(sv,PL_oldname,oldlen);
550 SETERRNO(0,0); /* in case sprintf set errno */
552 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
553 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp)) {
555 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
556 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) {
558 if (ckWARN_d(WARN_INPLACE))
559 Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit on %s: %s",
560 PL_oldname, Strerror(errno) );
564 setdefout(PL_argvoutgv);
565 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
566 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
568 (void)fchmod(PL_lastfd,PL_filemode);
570 # if !(defined(WIN32) && defined(__BORLANDC__))
571 /* Borland runtime creates a readonly file! */
572 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
575 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
577 (void)fchown(PL_lastfd,fileuid,filegid);
580 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
585 return IoIFP(GvIOp(gv));
588 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",
589 SvPV(sv, oldlen), Strerror(errno));
592 (void)do_close(PL_argvoutgv,FALSE);
593 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
600 Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
619 if (PerlProc_pipe(fd) < 0)
621 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
622 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
623 IoIFP(wstio) = IoOFP(wstio);
626 if (!IoIFP(rstio) || !IoOFP(wstio)) {
627 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
628 else PerlLIO_close(fd[0]);
629 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
630 else PerlLIO_close(fd[1]);
634 sv_setsv(sv,&PL_sv_yes);
638 sv_setsv(sv,&PL_sv_undef);
643 /* explicit renamed to avoid C++ conflict -- kja */
645 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
652 if (!gv || SvTYPE(gv) != SVt_PVGV) {
654 SETERRNO(EBADF,SS$_IVCHAN);
658 if (!io) { /* never opened */
661 if (ckWARN(WARN_UNOPENED))
662 Perl_warner(aTHX_ WARN_UNOPENED,
663 "Close on unopened file <%s>",GvENAME(gv));
664 SETERRNO(EBADF,SS$_IVCHAN);
668 retval = io_close(io);
672 IoLINES_LEFT(io) = IoPAGE_LEN(io);
679 Perl_io_close(pTHX_ IO *io)
685 if (IoTYPE(io) == '|') {
686 status = PerlProc_pclose(IoIFP(io));
687 STATUS_NATIVE_SET(status);
688 retval = (STATUS_POSIX == 0);
690 else if (IoTYPE(io) == '-')
693 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
694 retval = (PerlIO_close(IoOFP(io)) != EOF);
695 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
698 retval = (PerlIO_close(IoIFP(io)) != EOF);
700 IoOFP(io) = IoIFP(io) = Nullfp;
703 SETERRNO(EBADF,SS$_IVCHAN);
710 Perl_do_eof(pTHX_ GV *gv)
720 else if (ckWARN(WARN_IO)
721 && (IoTYPE(io) == '>' || IoIFP(io) == PerlIO_stdout()
722 || IoIFP(io) == PerlIO_stderr()))
724 SV* sv = sv_newmortal();
725 gv_efullname3(sv, gv, Nullch);
726 Perl_warner(aTHX_ WARN_IO, "Filehandle %s opened only for output",
732 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
733 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
734 return FALSE; /* this is the most usual case */
737 ch = PerlIO_getc(IoIFP(io));
739 (void)PerlIO_ungetc(IoIFP(io),ch);
742 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
743 if (PerlIO_get_cnt(IoIFP(io)) < -1)
744 PerlIO_set_cnt(IoIFP(io),-1);
746 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
747 if (!nextargv(PL_argvgv)) /* get another fp handy */
751 return TRUE; /* normal fp, definitely end of file */
757 Perl_do_tell(pTHX_ GV *gv)
762 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
763 #ifdef ULTRIX_STDIO_BOTCH
765 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
767 return PerlIO_tell(fp);
771 if (ckWARN(WARN_UNOPENED))
772 Perl_warner(aTHX_ WARN_UNOPENED, "tell() on unopened file");
774 SETERRNO(EBADF,RMS$_IFI);
779 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
784 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
785 #ifdef ULTRIX_STDIO_BOTCH
787 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
789 return PerlIO_seek(fp, pos, whence) >= 0;
793 if (ckWARN(WARN_UNOPENED))
794 Perl_warner(aTHX_ WARN_UNOPENED, "seek() on unopened file");
796 SETERRNO(EBADF,RMS$_IFI);
801 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
806 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
807 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
810 if (ckWARN(WARN_UNOPENED))
811 Perl_warner(aTHX_ WARN_UNOPENED, "sysseek() on unopened file");
813 SETERRNO(EBADF,RMS$_IFI);
818 Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int flag)
821 Perl_croak(aTHX_ "panic: unsetting binmode"); /* Not implemented yet */
823 #if defined(atarist) || defined(__MINT__)
824 if (!PerlIO_flush(fp) && (fp->_flag |= _IOBIN))
829 if (PerlLIO_setmode(PerlIO_fileno(fp), OP_BINARY) != -1) {
830 #if defined(WIN32) && defined(__BORLANDC__)
831 /* The translation mode of the stream is maintained independent
832 * of the translation mode of the fd in the Borland RTL (heavy
833 * digging through their runtime sources reveal). User has to
834 * set the mode explicitly for the stream (though they don't
835 * document this anywhere). GSAR 97-5-24
837 PerlIO_seek(fp,0L,0);
838 ((FILE*)fp)->flags |= _F_BIN;
846 #if defined(USEMYBINMODE)
847 if (my_binmode(fp,iotype) != FALSE)
857 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
858 /* code courtesy of William Kucharski */
861 I32 my_chsize(fd, length)
862 I32 fd; /* file descriptor */
863 Off_t length; /* length to set file to */
868 if (PerlLIO_fstat(fd, &filebuf) < 0)
871 if (filebuf.st_size < length) {
873 /* extend file length */
875 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
878 /* write a "0" byte */
880 if ((PerlLIO_write(fd, "", 1)) != 1)
884 /* truncate length */
889 fl.l_type = F_WRLCK; /* write lock on file space */
892 * This relies on the UNDOCUMENTED F_FREESP argument to
893 * fcntl(2), which truncates the file so that it ends at the
894 * position indicated by fl.l_start.
896 * Will minor miracles never cease?
899 if (fcntl(fd, F_FREESP, &fl) < 0)
906 #endif /* F_FREESP */
909 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
914 /* assuming fp is checked earlier */
920 if (SvIOK(sv) && SvIVX(sv) != 0) {
921 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
922 return !PerlIO_error(fp);
924 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
925 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
926 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
927 return !PerlIO_error(fp);
930 switch (SvTYPE(sv)) {
934 if (ckWARN(WARN_UNINITIALIZED))
935 Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit);
942 if (SvIsUV(sv)) /* XXXX 64-bit? */
943 PerlIO_printf(fp, "%lu", (unsigned long)SvUVX(sv));
945 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
946 return !PerlIO_error(fp);
950 tmps = SvPV(sv, len);
953 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
955 return !PerlIO_error(fp);
965 if (PL_op->op_flags & OPf_REF) {
967 tmpgv = cGVOP->op_gv;
970 if (io && IoIFP(io)) {
972 sv_setpv(PL_statname,"");
973 PL_laststype = OP_STAT;
974 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
977 if (tmpgv == PL_defgv)
978 return PL_laststatval;
979 if (ckWARN(WARN_UNOPENED))
980 Perl_warner(aTHX_ WARN_UNOPENED, "Stat on unopened file <%s>",
983 sv_setpv(PL_statname,"");
984 return (PL_laststatval = -1);
992 if (SvTYPE(sv) == SVt_PVGV) {
996 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
997 tmpgv = (GV*)SvRV(sv);
1003 sv_setpv(PL_statname, s);
1004 PL_laststype = OP_STAT;
1005 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1006 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1007 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
1008 return PL_laststatval;
1018 if (PL_op->op_flags & OPf_REF) {
1020 if (cGVOP->op_gv == PL_defgv) {
1021 if (PL_laststype != OP_LSTAT)
1022 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
1023 return PL_laststatval;
1025 Perl_croak(aTHX_ "You can't use -l on a filehandle");
1028 PL_laststype = OP_LSTAT;
1032 sv_setpv(PL_statname,SvPV(sv, n_a));
1033 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
1034 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
1035 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
1036 return PL_laststatval;
1040 Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1048 New(401,PL_Argv, sp - mark + 1, char*);
1050 while (++mark <= sp) {
1052 *a++ = SvPVx(*mark, n_a);
1057 if (*PL_Argv[0] != '/') /* will execvp use PATH? */
1058 TAINT_ENV(); /* testing IFS here is overkill, probably */
1059 if (really && *(tmps = SvPV(really, n_a)))
1060 PerlProc_execvp(tmps,PL_Argv);
1062 PerlProc_execvp(PL_Argv[0],PL_Argv);
1063 if (ckWARN(WARN_EXEC))
1064 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1065 PL_Argv[0], Strerror(errno));
1072 Perl_do_execfree(pTHX)
1076 PL_Argv = Null(char **);
1084 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC)
1087 Perl_do_exec(pTHX_ char *cmd)
1089 return do_exec3(cmd,0,0);
1093 Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1099 while (*cmd && isSPACE(*cmd))
1102 /* save an extra exec if possible */
1105 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1107 s = cmd+PL_cshlen+3;
1121 if (s[-1] == '\'') {
1123 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1131 /* see if there are shell metacharacters in it */
1133 if (*cmd == '.' && isSPACE(cmd[1]))
1136 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1139 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
1143 for (s = cmd; *s; s++) {
1144 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1145 if (*s == '\n' && !s[1]) {
1149 /* handle the 2>&1 construct at the end */
1150 if (*s == '>' && s[1] == '&' && s[2] == '1'
1151 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1152 && (!s[3] || isSPACE(s[3])))
1156 while (*t && isSPACE(*t))
1158 if (!*t && (dup2(1,2) != -1)) {
1164 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1169 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1170 PL_Cmd = savepvn(cmd, s-cmd);
1172 for (s = PL_Cmd; *s;) {
1173 while (*s && isSPACE(*s)) s++;
1176 while (*s && !isSPACE(*s)) s++;
1182 PerlProc_execvp(PL_Argv[0],PL_Argv);
1183 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1191 if (ckWARN(WARN_EXEC))
1192 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1193 PL_Argv[0], Strerror(errno));
1195 PerlLIO_write(fd, (void*)&e, sizeof(int));
1204 #endif /* OS2 || WIN32 */
1207 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1212 register I32 tot = 0;
1215 SV **oldmark = mark;
1218 #define APPLY_TAINT_PROPER() \
1220 if (PL_tainted) { TAINT_PROPER(what); } \
1223 /* This is a first heuristic; it doesn't catch tainting magic. */
1225 while (++mark <= sp) {
1226 if (SvTAINTED(*mark)) {
1236 APPLY_TAINT_PROPER();
1239 APPLY_TAINT_PROPER();
1241 while (++mark <= sp) {
1242 char *name = SvPVx(*mark, n_a);
1243 APPLY_TAINT_PROPER();
1244 if (PerlLIO_chmod(name, val))
1252 APPLY_TAINT_PROPER();
1253 if (sp - mark > 2) {
1254 val = SvIVx(*++mark);
1255 val2 = SvIVx(*++mark);
1256 APPLY_TAINT_PROPER();
1258 while (++mark <= sp) {
1259 char *name = SvPVx(*mark, n_a);
1260 APPLY_TAINT_PROPER();
1261 if (PerlLIO_chown(name, val, val2))
1268 XXX Should we make lchown() directly available from perl?
1269 For now, we'll let Configure test for HAS_LCHOWN, but do
1270 nothing in the core.
1276 APPLY_TAINT_PROPER();
1279 s = SvPVx(*++mark, n_a);
1281 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1283 if (!(val = whichsig(s)))
1284 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1288 APPLY_TAINT_PROPER();
1291 /* kill() doesn't do process groups (job trees?) under VMS */
1292 if (val < 0) val = -val;
1293 if (val == SIGKILL) {
1294 # include <starlet.h>
1295 /* Use native sys$delprc() to insure that target process is
1296 * deleted; supervisor-mode images don't pay attention to
1297 * CRTL's emulation of Unix-style signals and kill()
1299 while (++mark <= sp) {
1300 I32 proc = SvIVx(*mark);
1301 register unsigned long int __vmssts;
1302 APPLY_TAINT_PROPER();
1303 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1307 case SS$_NOSUCHNODE:
1308 SETERRNO(ESRCH,__vmssts);
1311 SETERRNO(EPERM,__vmssts);
1314 SETERRNO(EVMSERR,__vmssts);
1323 while (++mark <= sp) {
1324 I32 proc = SvIVx(*mark);
1325 APPLY_TAINT_PROPER();
1327 if (PerlProc_killpg(proc,val)) /* BSD */
1329 if (PerlProc_kill(-proc,val)) /* SYSV */
1335 while (++mark <= sp) {
1336 I32 proc = SvIVx(*mark);
1337 APPLY_TAINT_PROPER();
1338 if (PerlProc_kill(proc, val))
1346 APPLY_TAINT_PROPER();
1348 while (++mark <= sp) {
1349 s = SvPVx(*mark, n_a);
1350 APPLY_TAINT_PROPER();
1351 if (PL_euid || PL_unsafe) {
1355 else { /* don't let root wipe out directories without -U */
1356 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1368 APPLY_TAINT_PROPER();
1369 if (sp - mark > 2) {
1370 #if defined(I_UTIME) || defined(VMS)
1371 struct utimbuf utbuf;
1379 Zero(&utbuf, sizeof utbuf, char);
1381 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1382 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1384 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1385 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
1387 APPLY_TAINT_PROPER();
1389 while (++mark <= sp) {
1390 char *name = SvPVx(*mark, n_a);
1391 APPLY_TAINT_PROPER();
1392 if (PerlLIO_utime(name, &utbuf))
1403 #undef APPLY_TAINT_PROPER
1406 /* Do the permissions allow some operation? Assumes statcache already set. */
1407 #ifndef VMS /* VMS' cando is in vms.c */
1409 Perl_cando(pTHX_ I32 bit, I32 effective, register struct stat *statbufp)
1412 /* [Comments and code from Len Reed]
1413 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1414 * to write-protected files. The execute permission bit is set
1415 * by the Miscrosoft C library stat() function for the following:
1420 * All files and directories are readable.
1421 * Directories and special files, e.g. "CON", cannot be
1423 * [Comment by Tom Dinger -- a directory can have the write-protect
1424 * bit set in the file system, but DOS permits changes to
1425 * the directory anyway. In addition, all bets are off
1426 * here for networked software, such as Novell and
1430 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1431 * too so it will actually look into the files for magic numbers
1433 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1435 #else /* ! DOSISH */
1436 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1437 if (bit == S_IXUSR) {
1438 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1442 return TRUE; /* root reads and writes anything */
1445 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1446 if (statbufp->st_mode & bit)
1447 return TRUE; /* ok as "user" */
1449 else if (ingroup((I32)statbufp->st_gid,effective)) {
1450 if (statbufp->st_mode & bit >> 3)
1451 return TRUE; /* ok as "group" */
1453 else if (statbufp->st_mode & bit >> 6)
1454 return TRUE; /* ok as "other" */
1456 #endif /* ! DOSISH */
1461 Perl_ingroup(pTHX_ I32 testgid, I32 effective)
1463 if (testgid == (effective ? PL_egid : PL_gid))
1465 #ifdef HAS_GETGROUPS
1470 Groups_t gary[NGROUPS];
1473 anum = getgroups(NGROUPS,gary);
1475 if (gary[anum] == testgid)
1482 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1485 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1491 key = (key_t)SvNVx(*++mark);
1492 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1493 flags = SvIVx(*++mark);
1499 return msgget(key, flags);
1503 return semget(key, n, flags);
1507 return shmget(key, n, flags);
1509 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1511 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1514 return -1; /* should never happen */
1518 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
1523 I32 id, n, cmd, infosize, getinfo;
1526 id = SvIVx(*++mark);
1527 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1528 cmd = SvIVx(*++mark);
1531 getinfo = (cmd == IPC_STAT);
1537 if (cmd == IPC_STAT || cmd == IPC_SET)
1538 infosize = sizeof(struct msqid_ds);
1543 if (cmd == IPC_STAT || cmd == IPC_SET)
1544 infosize = sizeof(struct shmid_ds);
1550 if (cmd == IPC_STAT || cmd == IPC_SET)
1551 infosize = sizeof(struct semid_ds);
1552 else if (cmd == GETALL || cmd == SETALL)
1554 struct semid_ds semds;
1558 getinfo = (cmd == GETALL);
1559 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1561 infosize = semds.sem_nsems * sizeof(short);
1562 /* "short" is technically wrong but much more portable
1563 than guessing about u_?short(_t)? */
1566 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1570 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1572 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1581 SvPV_force(astr, len);
1582 a = SvGROW(astr, infosize+1);
1586 a = SvPV(astr, len);
1587 if (len != infosize)
1588 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
1597 a = (char *)i; /* ouch */
1604 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1610 union semun unsemds;
1612 unsemds.buf = (struct semid_ds *)a;
1613 ret = Semctl(id, n, cmd, unsemds);
1615 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1622 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1626 if (getinfo && ret >= 0) {
1627 SvCUR_set(astr, infosize);
1628 *SvEND(astr) = '\0';
1635 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
1641 I32 id, msize, flags;
1644 id = SvIVx(*++mark);
1646 flags = SvIVx(*++mark);
1647 mbuf = SvPV(mstr, len);
1648 if ((msize = len - sizeof(long)) < 0)
1649 Perl_croak(aTHX_ "Arg too short for msgsnd");
1651 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1653 Perl_croak(aTHX_ "msgsnd not implemented");
1658 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
1665 I32 id, msize, flags, ret;
1668 id = SvIVx(*++mark);
1670 msize = SvIVx(*++mark);
1671 mtype = (long)SvIVx(*++mark);
1672 flags = SvIVx(*++mark);
1673 SvPV_force(mstr, len);
1674 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1677 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1679 SvCUR_set(mstr, sizeof(long)+ret);
1680 *SvEND(mstr) = '\0';
1684 Perl_croak(aTHX_ "msgrcv not implemented");
1689 Perl_do_semop(pTHX_ SV **mark, SV **sp)
1698 id = SvIVx(*++mark);
1700 opbuf = SvPV(opstr, opsize);
1701 if (opsize < sizeof(struct sembuf)
1702 || (opsize % sizeof(struct sembuf)) != 0) {
1703 SETERRNO(EINVAL,LIB$_INVARG);
1707 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1709 Perl_croak(aTHX_ "semop not implemented");
1714 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
1720 I32 id, mpos, msize;
1722 struct shmid_ds shmds;
1724 id = SvIVx(*++mark);
1726 mpos = SvIVx(*++mark);
1727 msize = SvIVx(*++mark);
1729 if (shmctl(id, IPC_STAT, &shmds) == -1)
1731 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1732 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1735 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1736 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1738 if (optype == OP_SHMREAD) {
1739 SvPV_force(mstr, len);
1740 mbuf = SvGROW(mstr, msize+1);
1742 Copy(shm + mpos, mbuf, msize, char);
1743 SvCUR_set(mstr, msize);
1744 *SvEND(mstr) = '\0';
1750 mbuf = SvPV(mstr, len);
1751 if ((n = len) > msize)
1753 Copy(mbuf, shm + mpos, n, char);
1755 memzero(shm + mpos + n, msize - n);
1759 Perl_croak(aTHX_ "shm I/O not implemented");
1763 #endif /* SYSV IPC */