3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * Far below them they saw the white waters pour into a foaming bowl, and
13 * then swirl darkly about a deep oval basin in the rocks, until they found
14 * their way out again through a narrow gate, and flowed away, fuming and
15 * chattering, into calmer and more level reaches.
17 * [p.684 of _The Lord of the Rings_, IV/vi: "The Forbidden Pool"]
20 /* This file contains functions that do the actual I/O on behalf of ops.
21 * For example, pp_print() calls the do_print() function in this file for
22 * each argument needing printing.
26 #define PERL_IN_DOIO_C
29 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
38 # ifndef HAS_SHMAT_PROTOTYPE
39 extern Shmat_t shmat (int, char *, int);
45 # if defined(_MSC_VER) || defined(__MINGW32__)
46 # include <sys/utime.h>
53 # define OPEN_EXCL O_EXCL
58 #define PERL_MODE_MAX 8
59 #define PERL_FLAGS_MAX 10
64 S_openn_setup(pTHX_ GV *gv, char *mode, PerlIO **saveifp, PerlIO **saveofp,
65 int *savefd, char *savetype)
67 IO * const io = GvIOn(gv);
69 PERL_ARGS_ASSERT_OPENN_SETUP;
74 *savetype = IoTYPE_CLOSED;
76 Zero(mode,sizeof(mode),char);
77 PL_forkprocess = 1; /* assume true if no fork */
79 /* If currently open - close before we re-open */
81 if (IoTYPE(io) == IoTYPE_STD) {
82 /* This is a clone of one of STD* handles */
85 const int old_fd = PerlIO_fileno(IoIFP(io));
87 if (old_fd >= 0 && old_fd <= PL_maxsysfd) {
88 /* This is one of the original STD* handles */
91 *savetype = IoTYPE(io);
97 if (IoTYPE(io) == IoTYPE_PIPE)
98 result = PerlProc_pclose(IoIFP(io));
99 else if (IoIFP(io) != IoOFP(io)) {
101 result = PerlIO_close(IoOFP(io));
102 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
105 result = PerlIO_close(IoIFP(io));
108 result = PerlIO_close(IoIFP(io));
110 if (result == EOF && old_fd > PL_maxsysfd) {
111 /* Why is this not Perl_warn*() call ? */
112 PerlIO_printf(Perl_error_log,
113 "Warning: unable to close filehandle %" HEKf
115 HEKfARG(GvENAME_HEK(gv))
120 IoOFP(io) = IoIFP(io) = NULL;
126 Perl_do_openn(pTHX_ GV *gv, const char *oname, I32 len, int as_raw,
127 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
130 PERL_ARGS_ASSERT_DO_OPENN;
133 /* sysopen style args, i.e. integer mode and permissions */
136 Perl_croak(aTHX_ "panic: sysopen with multiple args, num_svs=%ld",
139 return do_open_raw(gv, oname, len, rawmode, rawperm, NULL);
141 return do_open6(gv, oname, len, supplied_fp, svp, num_svs);
145 Perl_do_open_raw(pTHX_ GV *gv, const char *oname, STRLEN len,
146 int rawmode, int rawperm, Stat_t *statbufp)
152 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
153 IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype);
157 PERL_ARGS_ASSERT_DO_OPEN_RAW;
159 /* For ease of blame back to 5.000, keep the existing indenting. */
161 /* sysopen style args, i.e. integer mode and permissions */
163 const int appendtrunc =
165 #ifdef O_APPEND /* Not fully portable. */
168 #ifdef O_TRUNC /* Not fully portable. */
172 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
182 It might be (in OS/390 and Mac OS Classic it is)
188 This means that simple & with O_RDWR would look
189 like O_RDONLY is present. Therefore we have to
192 if ((ismodifying = (rawmode & modifyingmode))) {
193 if ((ismodifying & O_WRONLY) == O_WRONLY ||
194 (ismodifying & O_RDWR) == O_RDWR ||
195 (ismodifying & (O_CREAT|appendtrunc)))
196 TAINT_PROPER("sysopen");
198 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
200 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
201 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
204 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
206 namesv = newSVpvn_flags(oname, len, SVs_TEMP);
207 fp = PerlIO_openn(aTHX_ NULL, mode, -1, rawmode, rawperm, NULL, 1, &namesv);
209 return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd,
210 savetype, writing, 0, NULL, statbufp);
214 Perl_do_open6(pTHX_ GV *gv, const char *oname, STRLEN len,
215 PerlIO *supplied_fp, SV **svp, U32 num_svs)
221 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
222 IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype);
225 bool was_fdopen = FALSE;
228 PERL_ARGS_ASSERT_DO_OPEN6;
230 /* For ease of blame back to 5.000, keep the existing indenting. */
232 /* Regular (non-sys) open */
237 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
239 /* Collect default raw/crlf info from the op */
240 if (PL_op && PL_op->op_type == OP_OPEN) {
241 /* set up IO layers */
242 const U8 flags = PL_op->op_private;
243 in_raw = (flags & OPpOPEN_IN_RAW);
244 in_crlf = (flags & OPpOPEN_IN_CRLF);
245 out_raw = (flags & OPpOPEN_OUT_RAW);
246 out_crlf = (flags & OPpOPEN_OUT_CRLF);
249 type = savepvn(oname, len);
253 /* Lose leading and trailing white space */
254 while (isSPACE(*type))
256 while (tend > type && isSPACE(tend[-1]))
262 /* New style explicit name, type is just mode and layer info */
264 if (SvROK(*svp) && !strchr(oname,'&')) {
266 Perl_warner(aTHX_ packWARN(WARN_IO),
267 "Can't open a reference");
268 SETERRNO(EINVAL, LIB_INVARG);
272 #endif /* USE_STDIO */
273 p = (SvOK(*svp) || SvGMAGICAL(*svp)) ? SvPV(*svp, nlen) : NULL;
275 if (p && !IS_SAFE_PATHNAME(p, nlen, "open")) {
280 name = p ? savepvn(p, nlen) : savepvs("");
289 if ((*type == IoTYPE_RDWR) && /* scary */
290 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
291 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
292 TAINT_PROPER("open");
297 if (*type == IoTYPE_PIPE) {
299 if (type[1] != IoTYPE_STD) {
301 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
307 } while (isSPACE(*type));
313 /* command is missing 19990114 */
314 if (ckWARN(WARN_PIPE))
315 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
320 if (!(*name == '-' && name[1] == '\0') || num_svs)
322 TAINT_PROPER("piped open");
323 if (!num_svs && name[len-1] == '|') {
325 if (ckWARN(WARN_PIPE))
326 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
335 fp = PerlProc_popen_list(mode, num_svs, svp);
338 fp = PerlProc_popen(name,mode);
342 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
349 else if (*type == IoTYPE_WRONLY) {
350 TAINT_PROPER("open");
352 if (*type == IoTYPE_WRONLY) {
353 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
354 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
368 dodup = PERLIO_DUP_FD;
374 if (!num_svs && !*type && supplied_fp) {
375 /* "<+&" etc. is used by typemaps */
379 PerlIO *that_fp = NULL;
383 /* diag_listed_as: More than one argument to '%s' open */
384 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
386 while (isSPACE(*type))
390 || (SvPOKp(*svp) && looks_like_number(*svp))
392 wanted_fd = SvUV(*svp);
395 else if (isDIGIT(*type)
396 && grok_atoUV(type, &uv, NULL)
404 thatio = sv_2io(*svp);
407 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
409 thatio = GvIO(thatgv);
413 SETERRNO(EINVAL,SS_IVCHAN);
418 if ((that_fp = IoIFP(thatio))) {
419 /* Flush stdio buffer before dup. --mjd
420 * Unfortunately SEEK_CURing 0 seems to
421 * be optimized away on most platforms;
422 * only Solaris and Linux seem to flush
424 /* On the other hand, do all platforms
425 * take gracefully to flushing a read-only
426 * filehandle? Perhaps we should do
427 * fsetpos(src)+fgetpos(dst)? --nik */
428 PerlIO_flush(that_fp);
429 wanted_fd = PerlIO_fileno(that_fp);
430 /* When dup()ing STDIN, STDOUT or STDERR
431 * explicitly set appropriate access mode */
432 if (that_fp == PerlIO_stdout()
433 || that_fp == PerlIO_stderr())
434 IoTYPE(io) = IoTYPE_WRONLY;
435 else if (that_fp == PerlIO_stdin())
436 IoTYPE(io) = IoTYPE_RDONLY;
437 /* When dup()ing a socket, say result is
439 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
440 IoTYPE(io) = IoTYPE_SOCKET;
443 SETERRNO(EBADF, RMS_IFI);
451 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
455 wanted_fd = PerlLIO_dup(wanted_fd);
458 if (!(fp = PerlIO_openn(aTHX_ type,mode,wanted_fd,0,0,NULL,num_svs,svp))) {
459 if (dodup && wanted_fd >= 0)
460 PerlLIO_close(wanted_fd);
466 while (isSPACE(*type))
468 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
470 fp = PerlIO_stdout();
471 IoTYPE(io) = IoTYPE_STD;
473 /* diag_listed_as: More than one argument to '%s' open */
474 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
479 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
482 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
484 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
488 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
489 goto unknown_open_mode;
490 } /* IoTYPE_WRONLY */
491 else if (*type == IoTYPE_RDONLY) {
494 } while (isSPACE(*type));
503 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
506 IoTYPE(io) = IoTYPE_STD;
508 /* diag_listed_as: More than one argument to '%s' open */
509 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
514 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
517 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
519 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
522 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
523 goto unknown_open_mode;
524 } /* IoTYPE_RDONLY */
525 else if ((num_svs && /* '-|...' or '...|' */
526 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
527 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
529 type += 2; /* skip over '-|' */
533 while (tend > type && isSPACE(tend[-1]))
535 for (; isSPACE(*type); type++)
541 /* command is missing 19990114 */
542 if (ckWARN(WARN_PIPE))
543 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
548 if (!(*name == '-' && name[1] == '\0') || num_svs)
550 TAINT_PROPER("piped open");
559 fp = PerlProc_popen_list(mode,num_svs,svp);
562 fp = PerlProc_popen(name,mode);
564 IoTYPE(io) = IoTYPE_PIPE;
566 while (isSPACE(*type))
569 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
576 else { /* layer(Args) */
578 goto unknown_open_mode;
580 IoTYPE(io) = IoTYPE_RDONLY;
581 for (; isSPACE(*name); name++)
590 if (*name == '-' && name[1] == '\0') {
592 IoTYPE(io) = IoTYPE_STD;
596 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
599 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
601 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
608 return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd,
609 savetype, writing, was_fdopen, type, NULL);
612 /* Yes, this is ugly, but it's private, and I don't see a cleaner way to
613 simplify the two-headed public interface of do_openn. */
615 S_openn_cleanup(pTHX_ GV *gv, IO *io, PerlIO *fp, char *mode, const char *oname,
616 PerlIO *saveifp, PerlIO *saveofp, int savefd, char savetype,
617 int writing, bool was_fdopen, const char *type, Stat_t *statbufp)
622 PERL_ARGS_ASSERT_OPENN_CLEANUP;
625 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
626 && should_warn_nl(oname)
630 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
631 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
637 if (ckWARN(WARN_IO)) {
638 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
639 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
640 Perl_warner(aTHX_ packWARN(WARN_IO),
641 "Filehandle STD%s reopened as %" HEKf
643 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
644 HEKfARG(GvENAME_HEK(gv)));
646 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
647 Perl_warner(aTHX_ packWARN(WARN_IO),
648 "Filehandle STDIN reopened as %" HEKf " only for output",
649 HEKfARG(GvENAME_HEK(gv))
654 fd = PerlIO_fileno(fp);
655 /* Do NOT do: "if (fd < 0) goto say_false;" here. If there is no
656 * fd assume it isn't a socket - this covers PerlIO::scalar -
657 * otherwise unless we "know" the type probe for socket-ness.
659 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
660 if (PerlLIO_fstat(fd,&statbuf) < 0) {
661 /* If PerlIO claims to have fd we had better be able to fstat() it. */
662 (void) PerlIO_close(fp);
666 if (S_ISSOCK(statbuf.st_mode))
667 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
670 !(statbuf.st_mode & S_IFMT)
671 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
672 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
673 ) { /* on OS's that return 0 on fstat()ed pipe */
675 Sock_size_t buflen = sizeof tmpbuf;
676 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
677 || errno != ENOTSOCK)
678 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
679 /* but some return 0 for streams too, sigh */
681 #endif /* HAS_SOCKET */
682 #endif /* !PERL_MICRO */
686 * If this is a standard handle we discard all the layer stuff
687 * and just dup the fd into whatever was on the handle before !
690 if (saveifp) { /* must use old fp? */
691 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
692 then dup the new fileno down
695 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
696 if (saveofp != saveifp) { /* was a socket? */
697 PerlIO_close(saveofp);
701 /* Still a small can-of-worms here if (say) PerlIO::scalar
702 is assigned to (say) STDOUT - for now let dup2() fail
703 and provide the error
706 SETERRNO(EBADF,RMS_IFI);
708 } else if (PerlLIO_dup2(fd, savefd) < 0) {
709 (void)PerlIO_close(fp);
713 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
714 char newname[FILENAME_MAX+1];
715 if (PerlIO_getname(fp, newname)) {
716 if (fd == PerlIO_fileno(PerlIO_stdout()))
717 vmssetuserlnm("SYS$OUTPUT", newname);
718 if (fd == PerlIO_fileno(PerlIO_stderr()))
719 vmssetuserlnm("SYS$ERROR", newname);
725 /* PL_fdpid isn't used on Windows, so avoid this useless work.
726 * XXX Probably the same for a lot of other places. */
731 sv = *av_fetch(PL_fdpid,fd,TRUE);
732 SvUPGRADE(sv, SVt_IV);
735 sv = *av_fetch(PL_fdpid,savefd,TRUE);
736 SvUPGRADE(sv, SVt_IV);
742 /* need to close fp without closing underlying fd */
743 int ofd = PerlIO_fileno(fp);
744 int dupfd = ofd >= 0 ? PerlLIO_dup(ofd) : -1;
745 #if defined(HAS_FCNTL) && defined(F_SETFD)
746 /* Assume if we have F_SETFD we have F_GETFD. */
747 /* Get a copy of all the fd flags. */
748 int fd_flags = ofd >= 0 ? fcntl(ofd, F_GETFD) : -1;
751 PerlLIO_close(dupfd);
755 if (ofd < 0 || dupfd < 0) {
757 PerlLIO_close(dupfd);
761 PerlLIO_dup2(dupfd, ofd);
762 #if defined(HAS_FCNTL) && defined(F_SETFD)
763 /* The dup trick has lost close-on-exec on ofd,
764 * and possibly any other flags, so restore them. */
765 if (fcntl(ofd,F_SETFD, fd_flags) < 0) {
767 PerlLIO_close(dupfd);
771 PerlLIO_close(dupfd);
778 fd = PerlIO_fileno(fp);
780 #if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
781 if (fd >= 0 && fd > PL_maxsysfd && fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) {
788 IoFLAGS(io) &= ~IOf_NOLINE;
790 if (IoTYPE(io) == IoTYPE_SOCKET
791 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(statbuf.st_mode)) ) {
793 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
796 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,NULL))) {
812 IoTYPE(io) = savetype;
817 Perl_nextargv(pTHX_ GV *gv, bool nomagicopen)
819 IO * const io = GvIOp(gv);
820 SV *const old_out_name = PL_inplace ? newSVsv(GvSV(gv)) : NULL;
822 PERL_ARGS_ASSERT_NEXTARGV;
825 SAVEFREESV(old_out_name);
828 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
829 if (io && (IoFLAGS(io) & (IOf_ARGV|IOf_START)) == (IOf_ARGV|IOf_START)) {
830 IoFLAGS(io) &= ~IOf_START;
833 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
834 SvREFCNT_inc_simple_NN(PL_defoutgv));
837 if (PL_filemode & (S_ISUID|S_ISGID)) {
838 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
841 (void)fchmod(PL_lastfd,PL_filemode);
843 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
850 while (av_tindex(GvAV(gv)) >= 0) {
852 SV *const sv = av_shift(GvAV(gv));
854 SvTAINTED_off(GvSVn(gv)); /* previous tainting irrelevant */
855 sv_setsv(GvSVn(gv),sv);
856 SvSETMAGIC(GvSV(gv));
857 PL_oldname = SvPVx(GvSV(gv), oldlen);
858 if (LIKELY(!PL_inplace)) {
860 ? do_open6(gv, "<", 1, NULL, &GvSV(gv), 1)
861 : do_open6(gv, PL_oldname, oldlen, NULL, NULL, 0)
863 return IoIFP(GvIOp(gv));
869 IO * const io = GvIOp(PL_argvoutgv);
870 if (io && IoIFP(io) && old_out_name && !io_close(io, PL_argvoutgv, FALSE, FALSE)) {
871 Perl_croak(aTHX_ "Failed to close in-place edit file %"
872 SVf ": %s\n", old_out_name, Strerror(errno));
875 /* This very long block ends with return IoIFP(GvIOp(gv));
876 Both this block and the block above fall through on open
877 failure to the warning code, and then the while loop above tries
879 if (do_open_raw(gv, PL_oldname, oldlen, O_RDONLY, 0, &statbuf)) {
880 #ifndef FLEXFILENAMES
887 TAINT_PROPER("inplace open");
888 if (oldlen == 1 && *PL_oldname == '-') {
889 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
891 return IoIFP(GvIOp(gv));
893 #ifndef FLEXFILENAMES
894 filedev = statbuf.st_dev;
895 fileino = statbuf.st_ino;
897 PL_filemode = statbuf.st_mode;
898 fileuid = statbuf.st_uid;
899 filegid = statbuf.st_gid;
900 if (!S_ISREG(PL_filemode)) {
901 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
902 "Can't do inplace edit: %s is not a regular file",
907 if (*PL_inplace && strNE(PL_inplace, "*")) {
908 const char *star = strchr(PL_inplace, '*');
910 const char *begin = PL_inplace;
913 sv_catpvn(sv, begin, star - begin);
914 sv_catpvn(sv, PL_oldname, oldlen);
916 } while ((star = strchr(begin, '*')));
921 sv_catpv(sv,PL_inplace);
923 #ifndef FLEXFILENAMES
924 if ((PerlLIO_stat(SvPVX_const(sv),&statbuf) >= 0
925 && statbuf.st_dev == filedev
926 && statbuf.st_ino == fileino)
928 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
932 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
933 "Can't do inplace edit: %"
934 SVf " would not be unique",
941 #if !defined(DOSISH) && !defined(__CYGWIN__)
942 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
943 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
944 "Can't rename %s to %" SVf
945 ": %s, skipping file",
946 PL_oldname, SVfARG(sv),
953 (void)PerlLIO_unlink(SvPVX_const(sv));
954 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
955 do_open_raw(gv, SvPVX_const(sv), SvCUR(sv), O_RDONLY, 0, NULL);
958 (void)UNLINK(SvPVX_const(sv));
959 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
960 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
961 "Can't rename %s to %" SVf ": %s, skipping file",
962 PL_oldname, SVfARG(sv), Strerror(errno) );
966 (void)UNLINK(PL_oldname);
970 #if !defined(DOSISH) && !defined(__amigaos4__)
971 # ifndef VMS /* Don't delete; use automatic file versioning */
972 if (UNLINK(PL_oldname) < 0) {
973 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
974 "Can't remove %s: %s, skipping file",
975 PL_oldname, Strerror(errno) );
981 Perl_croak(aTHX_ "Can't do inplace edit without backup");
985 sv_setpvn(sv,PL_oldname,oldlen);
986 SETERRNO(0,0); /* in case sprintf set errno */
987 if (!Perl_do_open_raw(aTHX_ PL_argvoutgv, SvPVX_const(sv),
990 O_WRONLY|O_CREAT|O_TRUNC, 0,
992 O_WRONLY|O_CREAT|OPEN_EXCL, 0600,
995 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
996 PL_oldname, Strerror(errno) );
1000 setdefout(PL_argvoutgv);
1001 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
1002 if (PL_lastfd >= 0) {
1003 (void)PerlLIO_fstat(PL_lastfd,&statbuf);
1005 (void)fchmod(PL_lastfd,PL_filemode);
1007 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
1009 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
1010 /* XXX silently ignore failures */
1012 PERL_UNUSED_RESULT(fchown(PL_lastfd,fileuid,filegid));
1015 PERL_UNUSED_RESULT(PerlLIO_chown(PL_oldname,fileuid,filegid));
1020 return IoIFP(GvIOp(gv));
1022 } /* successful do_open_raw(), PL_inplace non-NULL */
1024 if (ckWARN_d(WARN_INPLACE)) {
1025 const int eno = errno;
1027 if (PerlLIO_stat(PL_oldname, &statbuf) >= 0
1028 && !S_ISREG(statbuf.st_mode)) {
1029 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
1030 "Can't do inplace edit: %s is not a regular file",
1034 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
1035 PL_oldname, Strerror(eno));
1039 if (io && (IoFLAGS(io) & IOf_ARGV))
1040 IoFLAGS(io) |= IOf_START;
1043 IO * const io = GvIOp(PL_argvoutgv);
1044 if (io && IoIFP(io) && !io_close(io, PL_argvoutgv, FALSE, FALSE)) {
1045 Perl_croak(aTHX_ "Failed to close in-place edit file %" SVf ": %s\n",
1046 old_out_name, Strerror(errno));
1050 /* maybe this is no longer wanted */
1051 (void)do_close(PL_argvoutgv,FALSE);
1053 if (io && (IoFLAGS(io) & IOf_ARGV)
1054 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
1056 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
1058 SvREFCNT_dec_NN(oldout);
1061 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
1066 /* explicit renamed to avoid C++ conflict -- kja */
1068 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
1075 if (!gv || !isGV_with_GP(gv)) {
1077 SETERRNO(EBADF,SS_IVCHAN);
1081 if (!io) { /* never opened */
1084 SETERRNO(EBADF,SS_IVCHAN);
1088 retval = io_close(io, NULL, not_implicit, FALSE);
1092 IoLINES_LEFT(io) = IoPAGE_LEN(io);
1094 IoTYPE(io) = IoTYPE_CLOSED;
1099 Perl_io_close(pTHX_ IO *io, GV *gv, bool not_implicit, bool warn_on_fail)
1101 bool retval = FALSE;
1103 PERL_ARGS_ASSERT_IO_CLOSE;
1106 if (IoTYPE(io) == IoTYPE_PIPE) {
1107 const int status = PerlProc_pclose(IoIFP(io));
1109 STATUS_NATIVE_CHILD_SET(status);
1110 retval = (STATUS_UNIX == 0);
1113 retval = (status != -1);
1116 else if (IoTYPE(io) == IoTYPE_STD)
1119 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
1120 const bool prev_err = PerlIO_error(IoOFP(io));
1123 PerlIO_restore_errno(IoOFP(io));
1125 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
1126 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
1129 const bool prev_err = PerlIO_error(IoIFP(io));
1132 PerlIO_restore_errno(IoIFP(io));
1134 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1137 IoOFP(io) = IoIFP(io) = NULL;
1139 if (warn_on_fail && !retval) {
1141 Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
1142 "Warning: unable to close filehandle %"
1143 HEKf " properly: %" SVf,
1144 HEKfARG(GvNAME_HEK(gv)),
1145 SVfARG(get_sv("!",GV_ADD)));
1147 Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
1148 "Warning: unable to close filehandle "
1150 SVfARG(get_sv("!",GV_ADD)));
1153 else if (not_implicit) {
1154 SETERRNO(EBADF,SS_IVCHAN);
1161 Perl_do_eof(pTHX_ GV *gv)
1163 IO * const io = GvIO(gv);
1165 PERL_ARGS_ASSERT_DO_EOF;
1169 else if (IoTYPE(io) == IoTYPE_WRONLY)
1170 report_wrongway_fh(gv, '>');
1173 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1174 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1175 return FALSE; /* this is the most usual case */
1179 /* getc and ungetc can stomp on errno */
1181 const int ch = PerlIO_getc(IoIFP(io));
1183 (void)PerlIO_ungetc(IoIFP(io),ch);
1190 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1191 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1192 PerlIO_set_cnt(IoIFP(io),-1);
1194 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1195 if (gv != PL_argvgv || !nextargv(gv, FALSE)) /* get another fp handy */
1199 return TRUE; /* normal fp, definitely end of file */
1205 Perl_do_tell(pTHX_ GV *gv)
1207 IO *const io = GvIO(gv);
1210 PERL_ARGS_ASSERT_DO_TELL;
1212 if (io && (fp = IoIFP(io))) {
1213 return PerlIO_tell(fp);
1216 SETERRNO(EBADF,RMS_IFI);
1221 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1223 IO *const io = GvIO(gv);
1226 if (io && (fp = IoIFP(io))) {
1227 return PerlIO_seek(fp, pos, whence) >= 0;
1230 SETERRNO(EBADF,RMS_IFI);
1235 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1237 IO *const io = GvIO(gv);
1240 PERL_ARGS_ASSERT_DO_SYSSEEK;
1242 if (io && (fp = IoIFP(io))) {
1243 int fd = PerlIO_fileno(fp);
1244 if (fd < 0 || (whence == SEEK_SET && pos < 0)) {
1245 SETERRNO(EINVAL,LIB_INVARG);
1248 return PerlLIO_lseek(fd, pos, whence);
1252 SETERRNO(EBADF,RMS_IFI);
1257 Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
1259 int mode = O_BINARY;
1260 PERL_UNUSED_CONTEXT;
1266 if (s[2] == 'a' && s[3] == 'w'
1267 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1276 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1277 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1286 goto fail_discipline;
1289 else if (isSPACE(*s)) {
1296 end = strchr(s+1, ':');
1299 #ifndef PERLIO_LAYERS
1300 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1311 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1313 my_chsize(int fd, Off_t length)
1316 /* code courtesy of William Kucharski */
1321 if (PerlLIO_fstat(fd, &filebuf) < 0)
1324 if (filebuf.st_size < length) {
1326 /* extend file length */
1328 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1331 /* write a "0" byte */
1333 if ((PerlLIO_write(fd, "", 1)) != 1)
1337 /* truncate length */
1341 fl.l_start = length;
1342 fl.l_type = F_WRLCK; /* write lock on file space */
1345 * This relies on the UNDOCUMENTED F_FREESP argument to
1346 * fcntl(2), which truncates the file so that it ends at the
1347 * position indicated by fl.l_start.
1349 * Will minor miracles never cease?
1352 if (fcntl(fd, F_FREESP, &fl) < 0)
1358 Perl_croak_nocontext("truncate not implemented");
1359 #endif /* F_FREESP */
1362 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1365 Perl_do_print(pTHX_ SV *sv, PerlIO *fp)
1367 PERL_ARGS_ASSERT_DO_PRINT;
1369 /* assuming fp is checked earlier */
1372 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
1373 assert(!SvGMAGICAL(sv));
1375 PerlIO_printf(fp, "%" UVuf, (UV)SvUVX(sv));
1377 PerlIO_printf(fp, "%" IVdf, (IV)SvIVX(sv));
1378 return !PerlIO_error(fp);
1382 /* Do this first to trigger any overloading. */
1383 const char *tmps = SvPV_const(sv, len);
1387 if (PerlIO_isutf8(fp)) { /* If the stream is utf8 ... */
1388 if (!SvUTF8(sv)) { /* Convert to utf8 if necessary */
1389 /* We don't modify the original scalar. */
1390 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1391 tmps = (char *) tmpbuf;
1393 else if (ckWARN4_d(WARN_UTF8, WARN_SURROGATE, WARN_NON_UNICODE, WARN_NONCHAR)) {
1394 (void) check_utf8_print((const U8*) tmps, len);
1396 } /* else stream isn't utf8 */
1397 else if (DO_UTF8(sv)) { /* But if is utf8 internally, attempt to
1399 STRLEN tmplen = len;
1401 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
1404 /* Here, succeeded in downgrading from utf8. Set up to below
1405 * output the converted value */
1407 tmps = (char *) tmpbuf;
1410 else { /* Non-utf8 output stream, but string only representable in
1412 assert((char *)result == tmps);
1413 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
1414 "Wide character in %s",
1415 PL_op ? OP_DESC(PL_op) : "print"
1417 /* Could also check that isn't one of the things to avoid
1418 * in utf8 by using check_utf8_print(), but not doing so,
1419 * since the stream isn't a UTF8 stream */
1422 /* To detect whether the process is about to overstep its
1423 * filesize limit we would need getrlimit(). We could then
1424 * also transparently raise the limit with setrlimit() --
1425 * but only until the system hard limit/the filesystem limit,
1426 * at which we would get EPERM. Note that when using buffered
1427 * io the write failure can be delayed until the flush/close. --jhi */
1428 if (len && (PerlIO_write(fp,tmps,len) == 0))
1431 return happy ? !PerlIO_error(fp) : FALSE;
1436 Perl_my_stat_flags(pTHX_ const U32 flags)
1442 if (PL_op->op_flags & OPf_REF) {
1446 return PL_laststatval;
1449 PL_laststype = OP_STAT;
1450 PL_statgv = gv ? gv : (GV *)io;
1451 SvPVCLEAR(PL_statname);
1454 int fd = PerlIO_fileno(IoIFP(io));
1456 /* E.g. PerlIO::scalar has no real fd. */
1457 return (PL_laststatval = -1);
1459 return (PL_laststatval = PerlLIO_fstat(fd, &PL_statcache));
1461 } else if (IoDIRP(io)) {
1462 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
1465 PL_laststatval = -1;
1469 else if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1471 return PL_laststatval;
1473 SV* const sv = TOPs;
1476 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
1479 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
1480 io = MUTABLE_IO(SvRV(sv));
1482 goto do_fstat_have_io;
1485 s = SvPV_flags_const(sv, len, flags);
1487 sv_setpvn(PL_statname, s, len);
1488 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1489 PL_laststype = OP_STAT;
1490 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1491 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(s)) {
1492 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
1493 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1496 return PL_laststatval;
1502 Perl_my_lstat_flags(pTHX_ const U32 flags)
1504 static const char* const no_prev_lstat = "The stat preceding -l _ wasn't an lstat";
1507 SV* const sv = TOPs;
1509 if (PL_op->op_flags & OPf_REF) {
1510 if (cGVOP_gv == PL_defgv) {
1511 if (PL_laststype != OP_LSTAT)
1512 Perl_croak(aTHX_ "%s", no_prev_lstat);
1513 return PL_laststatval;
1515 PL_laststatval = -1;
1516 if (ckWARN(WARN_IO)) {
1517 /* diag_listed_as: Use of -l on filehandle%s */
1518 Perl_warner(aTHX_ packWARN(WARN_IO),
1519 "Use of -l on filehandle %" HEKf,
1520 HEKfARG(GvENAME_HEK(cGVOP_gv)));
1524 if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1526 if (PL_laststype != OP_LSTAT)
1527 Perl_croak(aTHX_ "%s", no_prev_lstat);
1528 return PL_laststatval;
1531 PL_laststype = OP_LSTAT;
1533 if ( ( (SvROK(sv) && ( isGV_with_GP(SvRV(sv))
1534 || (isio = SvTYPE(SvRV(sv)) == SVt_PVIO) )
1538 && ckWARN(WARN_IO)) {
1540 /* diag_listed_as: Use of -l on filehandle%s */
1541 Perl_warner(aTHX_ packWARN(WARN_IO),
1542 "Use of -l on filehandle");
1544 /* diag_listed_as: Use of -l on filehandle%s */
1545 Perl_warner(aTHX_ packWARN(WARN_IO),
1546 "Use of -l on filehandle %" HEKf,
1547 HEKfARG(GvENAME_HEK((const GV *)
1548 (SvROK(sv) ? SvRV(sv) : sv))));
1550 file = SvPV_flags_const_nolen(sv, flags);
1551 sv_setpv(PL_statname,file);
1552 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
1553 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(file)) {
1554 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
1555 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1558 return PL_laststatval;
1562 S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1564 const int e = errno;
1565 PERL_ARGS_ASSERT_EXEC_FAILED;
1567 if (ckWARN(WARN_EXEC))
1568 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1571 /* XXX silently ignore failures */
1572 PERL_UNUSED_RESULT(PerlLIO_write(fd, (void*)&e, sizeof(int)));
1578 Perl_do_aexec5(pTHX_ SV *really, SV **mark, SV **sp,
1579 int fd, int do_report)
1582 PERL_ARGS_ASSERT_DO_AEXEC5;
1583 #if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
1584 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1588 const char *tmps = NULL;
1589 Newx(PL_Argv, sp - mark + 1, const char*);
1592 while (++mark <= sp) {
1594 *a++ = SvPV_nolen_const(*mark);
1600 tmps = SvPV_nolen_const(really);
1601 if ((!really && *PL_Argv[0] != '/') ||
1602 (really && *tmps != '/')) /* will execvp use PATH? */
1603 TAINT_ENV(); /* testing IFS here is overkill, probably */
1605 if (really && *tmps) {
1606 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1608 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1611 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
1619 Perl_do_execfree(pTHX)
1627 #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
1630 Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
1637 /* Make a copy so we can change it */
1638 const Size_t cmdlen = strlen(incmd) + 1;
1640 PERL_ARGS_ASSERT_DO_EXEC3;
1642 Newx(buf, cmdlen, char);
1644 memcpy(cmd, incmd, cmdlen);
1646 while (*cmd && isSPACE(*cmd))
1649 /* save an extra exec if possible */
1653 char flags[PERL_FLAGS_MAX];
1654 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1655 strEQs(cmd+PL_cshlen," -c")) {
1656 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
1657 s = cmd+PL_cshlen+3;
1660 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
1665 char * const ncmd = s;
1671 if (s[-1] == '\'') {
1674 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
1677 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
1686 /* see if there are shell metacharacters in it */
1688 if (*cmd == '.' && isSPACE(cmd[1]))
1691 if (strEQs(cmd,"exec") && isSPACE(cmd[4]))
1695 while (isWORDCHAR(*s))
1696 s++; /* catch VAR=val gizmo */
1700 for (s = cmd; *s; s++) {
1701 if (*s != ' ' && !isALPHA(*s) &&
1702 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1703 if (*s == '\n' && !s[1]) {
1707 /* handle the 2>&1 construct at the end */
1708 if (*s == '>' && s[1] == '&' && s[2] == '1'
1709 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1710 && (!s[3] || isSPACE(s[3])))
1712 const char *t = s + 3;
1714 while (*t && isSPACE(*t))
1716 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1723 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
1725 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
1731 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*);
1732 PL_Cmd = savepvn(cmd, s-cmd);
1734 for (s = PL_Cmd; *s;) {
1739 while (*s && !isSPACE(*s))
1747 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1749 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1753 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
1760 #endif /* OS2 || WIN32 */
1763 Perl_apply(pTHX_ I32 type, SV **mark, SV **sp)
1767 const char *const what = PL_op_name[type];
1770 SV ** const oldmark = mark;
1771 bool killgp = FALSE;
1773 PERL_ARGS_ASSERT_APPLY;
1775 PERL_UNUSED_VAR(what); /* may not be used depending on compile options */
1777 /* Doing this ahead of the switch statement preserves the old behaviour,
1778 where attempting to use kill as a taint test test would fail on
1779 platforms where kill was not defined. */
1781 if (type == OP_KILL)
1782 Perl_die(aTHX_ PL_no_func, what);
1785 if (type == OP_CHOWN)
1786 Perl_die(aTHX_ PL_no_func, what);
1790 #define APPLY_TAINT_PROPER() \
1792 if (TAINT_get) { TAINT_PROPER(what); } \
1795 /* This is a first heuristic; it doesn't catch tainting magic. */
1797 while (++mark <= sp) {
1798 if (SvTAINTED(*mark)) {
1807 APPLY_TAINT_PROPER();
1810 APPLY_TAINT_PROPER();
1812 while (++mark <= sp) {
1814 if ((gv = MAYBE_DEREF_GV(*mark))) {
1815 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1817 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
1818 APPLY_TAINT_PROPER();
1820 SETERRNO(EBADF,RMS_IFI);
1822 } else if (fchmod(fd, val))
1825 Perl_die(aTHX_ PL_no_func, "fchmod");
1829 SETERRNO(EBADF,RMS_IFI);
1834 const char *name = SvPV_nomg_const(*mark, len);
1835 APPLY_TAINT_PROPER();
1836 if (!IS_SAFE_PATHNAME(name, len, "chmod") ||
1837 PerlLIO_chmod(name, val)) {
1846 APPLY_TAINT_PROPER();
1847 if (sp - mark > 2) {
1849 val = SvIVx(*++mark);
1850 val2 = SvIVx(*++mark);
1851 APPLY_TAINT_PROPER();
1853 while (++mark <= sp) {
1855 if ((gv = MAYBE_DEREF_GV(*mark))) {
1856 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1858 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
1859 APPLY_TAINT_PROPER();
1861 SETERRNO(EBADF,RMS_IFI);
1863 } else if (fchown(fd, val, val2))
1866 Perl_die(aTHX_ PL_no_func, "fchown");
1870 SETERRNO(EBADF,RMS_IFI);
1875 const char *name = SvPV_nomg_const(*mark, len);
1876 APPLY_TAINT_PROPER();
1877 if (!IS_SAFE_PATHNAME(name, len, "chown") ||
1878 PerlLIO_chown(name, val, val2)) {
1887 XXX Should we make lchown() directly available from perl?
1888 For now, we'll let Configure test for HAS_LCHOWN, but do
1889 nothing in the core.
1894 APPLY_TAINT_PROPER();
1897 s = SvPVx_const(*++mark, len);
1898 if (*s == '-' && isALPHA(s[1]))
1905 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
1909 if ((val = whichsig_pvn(s, len)) < 0)
1910 Perl_croak(aTHX_ "Unrecognized signal name \"%" SVf "\"",
1922 APPLY_TAINT_PROPER();
1925 while (++mark <= sp) {
1928 if (!(SvNIOK(*mark) || looks_like_number(*mark)))
1929 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1930 proc = SvIV_nomg(*mark);
1931 APPLY_TAINT_PROPER();
1933 /* use killpg in preference, as the killpg() wrapper for Win32
1934 * understands process groups, but the kill() wrapper doesn't */
1935 if (killgp ? PerlProc_killpg(proc, val)
1936 : PerlProc_kill(proc, val))
1938 if (PerlProc_kill(killgp ? -proc: proc, val))
1946 APPLY_TAINT_PROPER();
1948 while (++mark <= sp) {
1949 s = SvPV_const(*mark, len);
1950 APPLY_TAINT_PROPER();
1951 if (!IS_SAFE_PATHNAME(s, len, "unlink")) {
1954 else if (PL_unsafe) {
1959 #if defined(__amigaos4__) && defined(NEWLIB)
1962 /* Under AmigaOS4 unlink only 'fails' if the
1963 * filename is invalid. It may not remove the file
1964 * if it's locked, so check if it's still around. */
1965 if ((access(s,F_OK) != -1))
1972 else { /* don't let root wipe out directories without -U */
1974 if (PerlLIO_lstat(s, &statbuf) < 0)
1976 else if (S_ISDIR(statbuf.st_mode)) {
1977 SETERRNO(EISDIR, SS_NOPRIV);
1985 #if defined(__amigaos4__) && defined(NEWLIB)
1988 /* Under AmigaOS4 unlink only 'fails' if the filename is invalid */
1989 /* It may not remove the file if it's Locked, so check if it's still */
1991 if((access(s,F_OK) != -1))
2001 #if defined(HAS_UTIME) || defined(HAS_FUTIMES)
2003 APPLY_TAINT_PROPER();
2004 if (sp - mark > 2) {
2005 #if defined(HAS_FUTIMES)
2006 struct timeval utbuf[2];
2007 void *utbufp = utbuf;
2008 #elif defined(I_UTIME) || defined(VMS)
2009 struct utimbuf utbuf;
2010 struct utimbuf *utbufp = &utbuf;
2016 void *utbufp = &utbuf;
2019 SV* const accessed = *++mark;
2020 SV* const modified = *++mark;
2022 /* Be like C, and if both times are undefined, let the C
2023 * library figure out what to do. This usually means
2024 * "current time". */
2026 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
2029 Zero(&utbuf, sizeof utbuf, char);
2031 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
2032 utbuf[0].tv_usec = 0;
2033 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
2034 utbuf[1].tv_usec = 0;
2035 #elif defined(BIG_TIME)
2036 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
2037 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
2039 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
2040 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
2043 APPLY_TAINT_PROPER();
2045 while (++mark <= sp) {
2047 if ((gv = MAYBE_DEREF_GV(*mark))) {
2048 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
2050 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
2051 APPLY_TAINT_PROPER();
2053 SETERRNO(EBADF,RMS_IFI);
2055 } else if (futimes(fd, (struct timeval *) utbufp))
2058 Perl_die(aTHX_ PL_no_func, "futimes");
2066 const char * const name = SvPV_nomg_const(*mark, len);
2067 APPLY_TAINT_PROPER();
2068 if (!IS_SAFE_PATHNAME(name, len, "utime")) {
2073 if (utimes(name, (struct timeval *)utbufp))
2075 if (PerlLIO_utime(name, utbufp))
2089 #undef APPLY_TAINT_PROPER
2092 /* Do the permissions in *statbufp allow some operation? */
2093 #ifndef VMS /* VMS' cando is in vms.c */
2095 Perl_cando(pTHX_ Mode_t mode, bool effective, const Stat_t *statbufp)
2096 /* effective is a flag, true for EUID, or for checking if the effective gid
2097 * is in the list of groups returned from getgroups().
2100 PERL_ARGS_ASSERT_CANDO;
2101 PERL_UNUSED_CONTEXT;
2104 /* [Comments and code from Len Reed]
2105 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
2106 * to write-protected files. The execute permission bit is set
2107 * by the Microsoft C library stat() function for the following:
2112 * All files and directories are readable.
2113 * Directories and special files, e.g. "CON", cannot be
2115 * [Comment by Tom Dinger -- a directory can have the write-protect
2116 * bit set in the file system, but DOS permits changes to
2117 * the directory anyway. In addition, all bets are off
2118 * here for networked software, such as Novell and
2122 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
2123 * too so it will actually look into the files for magic numbers
2125 return cBOOL(mode & statbufp->st_mode);
2127 #else /* ! DOSISH */
2129 if (ingroup(544,effective)) { /* member of Administrators */
2131 if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 0) { /* root is special */
2133 if (mode == S_IXUSR) {
2134 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
2138 return TRUE; /* root reads and writes anything */
2141 if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) {
2142 if (statbufp->st_mode & mode)
2143 return TRUE; /* ok as "user" */
2145 else if (ingroup(statbufp->st_gid,effective)) {
2146 if (statbufp->st_mode & mode >> 3)
2147 return TRUE; /* ok as "group" */
2149 else if (statbufp->st_mode & mode >> 6)
2150 return TRUE; /* ok as "other" */
2152 #endif /* ! DOSISH */
2157 S_ingroup(pTHX_ Gid_t testgid, bool effective)
2159 #ifndef PERL_IMPLICIT_SYS
2160 /* PERL_IMPLICIT_SYS like Win32: getegid() etc. require the context. */
2161 PERL_UNUSED_CONTEXT;
2163 if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid()))
2165 #ifdef HAS_GETGROUPS
2167 Groups_t *gary = NULL;
2171 anum = getgroups(0, gary);
2173 Newx(gary, anum, Groups_t);
2174 anum = getgroups(anum, gary);
2176 if (gary[anum] == testgid) {
2190 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
2193 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
2195 const key_t key = (key_t)SvNVx(*++mark);
2196 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
2197 const I32 flags = SvIVx(*++mark);
2199 PERL_ARGS_ASSERT_DO_IPCGET;
2200 PERL_UNUSED_ARG(sp);
2207 return msgget(key, flags);
2211 return semget(key, (int) SvIV(nsv), flags);
2215 return shmget(key, (size_t) SvUV(nsv), flags);
2217 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2219 /* diag_listed_as: msg%s not implemented */
2220 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2223 return -1; /* should never happen */
2227 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
2231 const I32 id = SvIVx(*++mark);
2233 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
2235 const I32 cmd = SvIVx(*++mark);
2236 SV * const astr = *++mark;
2237 STRLEN infosize = 0;
2238 I32 getinfo = (cmd == IPC_STAT);
2240 PERL_ARGS_ASSERT_DO_IPCCTL;
2241 PERL_UNUSED_ARG(sp);
2247 if (cmd == IPC_STAT || cmd == IPC_SET)
2248 infosize = sizeof(struct msqid_ds);
2253 if (cmd == IPC_STAT || cmd == IPC_SET)
2254 infosize = sizeof(struct shmid_ds);
2260 if (cmd == IPC_STAT || cmd == IPC_SET)
2261 infosize = sizeof(struct semid_ds);
2262 else if (cmd == GETALL || cmd == SETALL)
2264 struct semid_ds semds;
2266 #ifdef EXTRA_F_IN_SEMUN_BUF
2267 semun.buff = &semds;
2271 getinfo = (cmd == GETALL);
2272 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2274 infosize = semds.sem_nsems * sizeof(short);
2275 /* "short" is technically wrong but much more portable
2276 than guessing about u_?short(_t)? */
2279 /* diag_listed_as: sem%s not implemented */
2280 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2284 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2286 /* diag_listed_as: shm%s not implemented */
2287 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2295 SvPV_force_nolen(astr);
2296 a = SvGROW(astr, infosize+1);
2301 a = SvPV(astr, len);
2302 if (len != infosize)
2303 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2311 const IV i = SvIV(astr);
2312 a = INT2PTR(char *,i); /* ouch */
2319 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2325 union semun unsemds;
2328 unsemds.val = PTR2nat(a);
2331 #ifdef EXTRA_F_IN_SEMUN_BUF
2332 unsemds.buff = (struct semid_ds *)a;
2334 unsemds.buf = (struct semid_ds *)a;
2337 ret = Semctl(id, n, cmd, unsemds);
2339 /* diag_listed_as: sem%s not implemented */
2340 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2347 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2351 if (getinfo && ret >= 0) {
2352 SvCUR_set(astr, infosize);
2353 *SvEND(astr) = '\0';
2360 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2364 const I32 id = SvIVx(*++mark);
2365 SV * const mstr = *++mark;
2366 const I32 flags = SvIVx(*++mark);
2367 const char * const mbuf = SvPV_const(mstr, len);
2368 const I32 msize = len - sizeof(long);
2370 PERL_ARGS_ASSERT_DO_MSGSND;
2371 PERL_UNUSED_ARG(sp);
2374 Perl_croak(aTHX_ "Arg too short for msgsnd");
2376 if (id >= 0 && flags >= 0) {
2377 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2379 SETERRNO(EINVAL,LIB_INVARG);
2383 PERL_UNUSED_ARG(sp);
2384 PERL_UNUSED_ARG(mark);
2385 /* diag_listed_as: msg%s not implemented */
2386 Perl_croak(aTHX_ "msgsnd not implemented");
2392 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2397 I32 msize, flags, ret;
2398 const I32 id = SvIVx(*++mark);
2399 SV * const mstr = *++mark;
2401 PERL_ARGS_ASSERT_DO_MSGRCV;
2402 PERL_UNUSED_ARG(sp);
2404 /* suppress warning when reading into undef var --jhi */
2407 msize = SvIVx(*++mark);
2408 mtype = (long)SvIVx(*++mark);
2409 flags = SvIVx(*++mark);
2410 SvPV_force_nolen(mstr);
2411 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2414 if (id >= 0 && msize >= 0 && flags >= 0) {
2415 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2417 SETERRNO(EINVAL,LIB_INVARG);
2421 SvCUR_set(mstr, sizeof(long)+ret);
2422 *SvEND(mstr) = '\0';
2423 /* who knows who has been playing with this message? */
2428 PERL_UNUSED_ARG(sp);
2429 PERL_UNUSED_ARG(mark);
2430 /* diag_listed_as: msg%s not implemented */
2431 Perl_croak(aTHX_ "msgrcv not implemented");
2437 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2441 const I32 id = SvIVx(*++mark);
2442 SV * const opstr = *++mark;
2443 const char * const opbuf = SvPV_const(opstr, opsize);
2445 PERL_ARGS_ASSERT_DO_SEMOP;
2446 PERL_UNUSED_ARG(sp);
2448 if (opsize < 3 * SHORTSIZE
2449 || (opsize % (3 * SHORTSIZE))) {
2450 SETERRNO(EINVAL,LIB_INVARG);
2454 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2456 const int nsops = opsize / (3 * sizeof (short));
2458 short * const ops = (short *) opbuf;
2460 struct sembuf *temps, *t;
2463 Newx (temps, nsops, struct sembuf);
2471 result = semop(id, temps, nsops);
2476 /* diag_listed_as: sem%s not implemented */
2477 Perl_croak(aTHX_ "semop not implemented");
2482 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2486 struct shmid_ds shmds;
2487 const I32 id = SvIVx(*++mark);
2488 SV * const mstr = *++mark;
2489 const I32 mpos = SvIVx(*++mark);
2490 const I32 msize = SvIVx(*++mark);
2492 PERL_ARGS_ASSERT_DO_SHMIO;
2493 PERL_UNUSED_ARG(sp);
2496 if (shmctl(id, IPC_STAT, &shmds) == -1)
2498 if (mpos < 0 || msize < 0
2499 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
2500 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2504 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2506 SETERRNO(EINVAL,LIB_INVARG);
2509 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2511 if (optype == OP_SHMREAD) {
2513 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2515 SvUPGRADE(mstr, SVt_PV);
2519 mbuf = SvGROW(mstr, (STRLEN)msize+1);
2521 Copy(shm + mpos, mbuf, msize, char);
2522 SvCUR_set(mstr, msize);
2523 *SvEND(mstr) = '\0';
2525 /* who knows who has been playing with this shared memory? */
2531 const char *mbuf = SvPV_const(mstr, len);
2532 const I32 n = ((I32)len > msize) ? msize : (I32)len;
2533 Copy(mbuf, shm + mpos, n, char);
2535 memzero(shm + mpos + n, msize - n);
2539 /* diag_listed_as: shm%s not implemented */
2540 Perl_croak(aTHX_ "shm I/O not implemented");
2545 #endif /* SYSV IPC */
2550 =for apidoc start_glob
2552 Function called by C<do_readline> to spawn a glob (or do the glob inside
2553 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2554 this glob starter is only used by miniperl during the build process,
2555 or when PERL_EXTERNAL_GLOB is defined.
2556 Moving it away shrinks F<pp_hot.c>; shrinking F<pp_hot.c> helps speed perl up.
2562 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2564 SV * const tmpcmd = newSV(0);
2567 const char *s = SvPV(tmpglob, len);
2569 PERL_ARGS_ASSERT_START_GLOB;
2571 if (!IS_SAFE_SYSCALL(s, len, "pattern", "glob"))
2576 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2577 /* since spawning off a process is a real performance hit */
2584 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
2589 sv_setpv(tmpcmd, "for a in ");
2590 sv_catsv(tmpcmd, tmpglob);
2591 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2594 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2595 sv_catsv(tmpcmd, tmpglob);
2597 sv_setpv(tmpcmd, "perlglob ");
2598 sv_catsv(tmpcmd, tmpglob);
2599 sv_catpv(tmpcmd, " |");
2604 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2605 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2606 sv_catsv(tmpcmd, tmpglob);
2607 sv_catpv(tmpcmd, "' 2>/dev/null |");
2609 sv_setpv(tmpcmd, "echo ");
2610 sv_catsv(tmpcmd, tmpglob);
2611 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2613 #endif /* !DOSISH */
2615 SV ** const svp = hv_fetchs(GvHVn(PL_envgv), "LS_COLORS", 0);
2617 save_helem_flags(GvHV(PL_envgv),
2618 newSVpvs_flags("LS_COLORS", SVs_TEMP), svp,
2621 (void)do_open6(PL_last_in_gv, SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2627 if (!fp && ckWARN(WARN_GLOB)) {
2628 Perl_warner(aTHX_ packWARN(WARN_GLOB), "glob failed (can't start child: %s)",
2636 * ex: set ts=8 sts=4 sw=4 et: