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);
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)
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);
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);
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)
621 PERL_ARGS_ASSERT_OPENN_CLEANUP;
624 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
625 && should_warn_nl(oname)
629 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
630 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
636 if (ckWARN(WARN_IO)) {
637 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
638 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
639 Perl_warner(aTHX_ packWARN(WARN_IO),
640 "Filehandle STD%s reopened as %" HEKf
642 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
643 HEKfARG(GvENAME_HEK(gv)));
645 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
646 Perl_warner(aTHX_ packWARN(WARN_IO),
647 "Filehandle STDIN reopened as %" HEKf " only for output",
648 HEKfARG(GvENAME_HEK(gv))
653 fd = PerlIO_fileno(fp);
654 /* Do NOT do: "if (fd < 0) goto say_false;" here. If there is no
655 * fd assume it isn't a socket - this covers PerlIO::scalar -
656 * otherwise unless we "know" the type probe for socket-ness.
658 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
659 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
660 /* If PerlIO claims to have fd we had better be able to fstat() it. */
661 (void) PerlIO_close(fp);
665 if (S_ISSOCK(PL_statbuf.st_mode))
666 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
669 !(PL_statbuf.st_mode & S_IFMT)
670 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
671 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
672 ) { /* on OS's that return 0 on fstat()ed pipe */
674 Sock_size_t buflen = sizeof tmpbuf;
675 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
676 || errno != ENOTSOCK)
677 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
678 /* but some return 0 for streams too, sigh */
680 #endif /* HAS_SOCKET */
681 #endif /* !PERL_MICRO */
685 * If this is a standard handle we discard all the layer stuff
686 * and just dup the fd into whatever was on the handle before !
689 if (saveifp) { /* must use old fp? */
690 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
691 then dup the new fileno down
694 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
695 if (saveofp != saveifp) { /* was a socket? */
696 PerlIO_close(saveofp);
700 /* Still a small can-of-worms here if (say) PerlIO::scalar
701 is assigned to (say) STDOUT - for now let dup2() fail
702 and provide the error
705 SETERRNO(EBADF,RMS_IFI);
707 } else if (PerlLIO_dup2(fd, savefd) < 0) {
708 (void)PerlIO_close(fp);
712 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
713 char newname[FILENAME_MAX+1];
714 if (PerlIO_getname(fp, newname)) {
715 if (fd == PerlIO_fileno(PerlIO_stdout()))
716 vmssetuserlnm("SYS$OUTPUT", newname);
717 if (fd == PerlIO_fileno(PerlIO_stderr()))
718 vmssetuserlnm("SYS$ERROR", newname);
724 /* PL_fdpid isn't used on Windows, so avoid this useless work.
725 * XXX Probably the same for a lot of other places. */
730 sv = *av_fetch(PL_fdpid,fd,TRUE);
731 SvUPGRADE(sv, SVt_IV);
734 sv = *av_fetch(PL_fdpid,savefd,TRUE);
735 SvUPGRADE(sv, SVt_IV);
741 /* need to close fp without closing underlying fd */
742 int ofd = PerlIO_fileno(fp);
743 int dupfd = ofd >= 0 ? PerlLIO_dup(ofd) : -1;
744 #if defined(HAS_FCNTL) && defined(F_SETFD)
745 /* Assume if we have F_SETFD we have F_GETFD. */
746 /* Get a copy of all the fd flags. */
747 int fd_flags = ofd >= 0 ? fcntl(ofd, F_GETFD) : -1;
750 PerlLIO_close(dupfd);
754 if (ofd < 0 || dupfd < 0) {
756 PerlLIO_close(dupfd);
760 PerlLIO_dup2(dupfd, ofd);
761 #if defined(HAS_FCNTL) && defined(F_SETFD)
762 /* The dup trick has lost close-on-exec on ofd,
763 * and possibly any other flags, so restore them. */
764 fcntl(ofd,F_SETFD, fd_flags);
766 PerlLIO_close(dupfd);
773 fd = PerlIO_fileno(fp);
775 #if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
776 if (fd >= 0 && fd > PL_maxsysfd && fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) {
783 IoFLAGS(io) &= ~IOf_NOLINE;
785 if (IoTYPE(io) == IoTYPE_SOCKET
786 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
788 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
791 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,NULL))) {
804 IoTYPE(io) = savetype;
809 Perl_nextargv(pTHX_ GV *gv, bool nomagicopen)
811 IO * const io = GvIOp(gv);
812 SV *const old_out_name = PL_inplace ? newSVsv(GvSV(gv)) : NULL;
814 PERL_ARGS_ASSERT_NEXTARGV;
817 SAVEFREESV(old_out_name);
820 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
821 if (io && (IoFLAGS(io) & (IOf_ARGV|IOf_START)) == (IOf_ARGV|IOf_START)) {
822 IoFLAGS(io) &= ~IOf_START;
825 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
826 SvREFCNT_inc_simple_NN(PL_defoutgv));
829 if (PL_filemode & (S_ISUID|S_ISGID)) {
830 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
833 (void)fchmod(PL_lastfd,PL_filemode);
835 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
842 while (av_tindex(GvAV(gv)) >= 0) {
845 SV *const sv = av_shift(GvAV(gv));
847 SvTAINTED_off(GvSVn(gv)); /* previous tainting irrelevant */
848 sv_setsv(GvSVn(gv),sv);
849 SvSETMAGIC(GvSV(gv));
850 PL_oldname = SvPVx(GvSV(gv), oldlen);
851 if (LIKELY(!PL_inplace)) {
853 ? do_open6(gv, "<", 1, NULL, &GvSV(gv), 1)
854 : do_open6(gv, PL_oldname, oldlen, NULL, NULL, 0)
856 return IoIFP(GvIOp(gv));
861 IO * const io = GvIOp(PL_argvoutgv);
862 if (io && IoIFP(io) && old_out_name && !io_close(io, PL_argvoutgv, FALSE, FALSE)) {
863 Perl_croak(aTHX_ "Failed to close in-place edit file %"
864 SVf ": %s\n", old_out_name, Strerror(errno));
867 /* This very long block ends with return IoIFP(GvIOp(gv));
868 Both this block and the block above fall through on open
869 failure to the warning code, and then the while loop above tries
871 if (do_open_raw(gv, PL_oldname, oldlen, O_RDONLY, 0)) {
872 #ifndef FLEXFILENAMES
879 TAINT_PROPER("inplace open");
880 if (oldlen == 1 && *PL_oldname == '-') {
881 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
883 return IoIFP(GvIOp(gv));
885 #ifndef FLEXFILENAMES
886 filedev = PL_statbuf.st_dev;
887 fileino = PL_statbuf.st_ino;
889 PL_filemode = PL_statbuf.st_mode;
890 fileuid = PL_statbuf.st_uid;
891 filegid = PL_statbuf.st_gid;
892 if (!S_ISREG(PL_filemode)) {
893 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
894 "Can't do inplace edit: %s is not a regular file",
899 if (*PL_inplace && strNE(PL_inplace, "*")) {
900 const char *star = strchr(PL_inplace, '*');
902 const char *begin = PL_inplace;
905 sv_catpvn(sv, begin, star - begin);
906 sv_catpvn(sv, PL_oldname, oldlen);
908 } while ((star = strchr(begin, '*')));
913 sv_catpv(sv,PL_inplace);
915 #ifndef FLEXFILENAMES
916 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
917 && PL_statbuf.st_dev == filedev
918 && PL_statbuf.st_ino == fileino)
920 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
924 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
925 "Can't do inplace edit: %"
926 SVf " would not be unique",
933 #if !defined(DOSISH) && !defined(__CYGWIN__)
934 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
935 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
936 "Can't rename %s to %" SVf
937 ": %s, skipping file",
938 PL_oldname, SVfARG(sv),
945 (void)PerlLIO_unlink(SvPVX_const(sv));
946 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
947 do_open_raw(gv, SvPVX_const(sv), SvCUR(sv), O_RDONLY, 0);
950 (void)UNLINK(SvPVX_const(sv));
951 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
952 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
953 "Can't rename %s to %" SVf ": %s, skipping file",
954 PL_oldname, SVfARG(sv), Strerror(errno) );
958 (void)UNLINK(PL_oldname);
962 #if !defined(DOSISH) && !defined(__amigaos4__)
963 # ifndef VMS /* Don't delete; use automatic file versioning */
964 if (UNLINK(PL_oldname) < 0) {
965 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
966 "Can't remove %s: %s, skipping file",
967 PL_oldname, Strerror(errno) );
973 Perl_croak(aTHX_ "Can't do inplace edit without backup");
977 sv_setpvn(sv,PL_oldname,oldlen);
978 SETERRNO(0,0); /* in case sprintf set errno */
979 if (!Perl_do_open_raw(aTHX_ PL_argvoutgv, SvPVX_const(sv),
982 O_WRONLY|O_CREAT|O_TRUNC, 0
984 O_WRONLY|O_CREAT|OPEN_EXCL, 0600
987 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
988 PL_oldname, Strerror(errno) );
992 setdefout(PL_argvoutgv);
993 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
994 if (PL_lastfd >= 0) {
995 (void)PerlLIO_fstat(PL_lastfd,&statbuf);
997 (void)fchmod(PL_lastfd,PL_filemode);
999 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
1001 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
1002 /* XXX silently ignore failures */
1004 PERL_UNUSED_RESULT(fchown(PL_lastfd,fileuid,filegid));
1007 PERL_UNUSED_RESULT(PerlLIO_chown(PL_oldname,fileuid,filegid));
1012 return IoIFP(GvIOp(gv));
1014 } /* successful do_open_raw(), PL_inplace non-NULL */
1016 if (ckWARN_d(WARN_INPLACE)) {
1017 const int eno = errno;
1018 if (PerlLIO_stat(PL_oldname, &statbuf) >= 0
1019 && !S_ISREG(statbuf.st_mode)) {
1020 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
1021 "Can't do inplace edit: %s is not a regular file",
1025 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
1026 PL_oldname, Strerror(eno));
1030 if (io && (IoFLAGS(io) & IOf_ARGV))
1031 IoFLAGS(io) |= IOf_START;
1034 IO * const io = GvIOp(PL_argvoutgv);
1035 if (io && IoIFP(io) && !io_close(io, PL_argvoutgv, FALSE, FALSE)) {
1036 Perl_croak(aTHX_ "Failed to close in-place edit file %" SVf ": %s\n",
1037 old_out_name, Strerror(errno));
1041 /* maybe this is no longer wanted */
1042 (void)do_close(PL_argvoutgv,FALSE);
1044 if (io && (IoFLAGS(io) & IOf_ARGV)
1045 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
1047 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
1049 SvREFCNT_dec_NN(oldout);
1052 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
1057 /* explicit renamed to avoid C++ conflict -- kja */
1059 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
1066 if (!gv || !isGV_with_GP(gv)) {
1068 SETERRNO(EBADF,SS_IVCHAN);
1072 if (!io) { /* never opened */
1075 SETERRNO(EBADF,SS_IVCHAN);
1079 retval = io_close(io, NULL, not_implicit, FALSE);
1083 IoLINES_LEFT(io) = IoPAGE_LEN(io);
1085 IoTYPE(io) = IoTYPE_CLOSED;
1090 Perl_io_close(pTHX_ IO *io, GV *gv, bool not_implicit, bool warn_on_fail)
1092 bool retval = FALSE;
1094 PERL_ARGS_ASSERT_IO_CLOSE;
1097 if (IoTYPE(io) == IoTYPE_PIPE) {
1098 const int status = PerlProc_pclose(IoIFP(io));
1100 STATUS_NATIVE_CHILD_SET(status);
1101 retval = (STATUS_UNIX == 0);
1104 retval = (status != -1);
1107 else if (IoTYPE(io) == IoTYPE_STD)
1110 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
1111 const bool prev_err = PerlIO_error(IoOFP(io));
1114 PerlIO_restore_errno(IoOFP(io));
1116 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
1117 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
1120 const bool prev_err = PerlIO_error(IoIFP(io));
1123 PerlIO_restore_errno(IoIFP(io));
1125 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1128 IoOFP(io) = IoIFP(io) = NULL;
1130 if (warn_on_fail && !retval) {
1132 Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
1133 "Warning: unable to close filehandle %"
1134 HEKf " properly: %" SVf,
1135 HEKfARG(GvNAME_HEK(gv)),
1136 SVfARG(get_sv("!",GV_ADD)));
1138 Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
1139 "Warning: unable to close filehandle "
1141 SVfARG(get_sv("!",GV_ADD)));
1144 else if (not_implicit) {
1145 SETERRNO(EBADF,SS_IVCHAN);
1152 Perl_do_eof(pTHX_ GV *gv)
1154 IO * const io = GvIO(gv);
1156 PERL_ARGS_ASSERT_DO_EOF;
1160 else if (IoTYPE(io) == IoTYPE_WRONLY)
1161 report_wrongway_fh(gv, '>');
1164 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1165 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1166 return FALSE; /* this is the most usual case */
1170 /* getc and ungetc can stomp on errno */
1172 const int ch = PerlIO_getc(IoIFP(io));
1174 (void)PerlIO_ungetc(IoIFP(io),ch);
1181 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1182 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1183 PerlIO_set_cnt(IoIFP(io),-1);
1185 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1186 if (gv != PL_argvgv || !nextargv(gv, FALSE)) /* get another fp handy */
1190 return TRUE; /* normal fp, definitely end of file */
1196 Perl_do_tell(pTHX_ GV *gv)
1198 IO *const io = GvIO(gv);
1201 PERL_ARGS_ASSERT_DO_TELL;
1203 if (io && (fp = IoIFP(io))) {
1204 return PerlIO_tell(fp);
1207 SETERRNO(EBADF,RMS_IFI);
1212 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1214 IO *const io = GvIO(gv);
1217 if (io && (fp = IoIFP(io))) {
1218 return PerlIO_seek(fp, pos, whence) >= 0;
1221 SETERRNO(EBADF,RMS_IFI);
1226 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1228 IO *const io = GvIO(gv);
1231 PERL_ARGS_ASSERT_DO_SYSSEEK;
1233 if (io && (fp = IoIFP(io))) {
1234 int fd = PerlIO_fileno(fp);
1235 if (fd < 0 || (whence == SEEK_SET && pos < 0)) {
1236 SETERRNO(EINVAL,LIB_INVARG);
1239 return PerlLIO_lseek(fd, pos, whence);
1243 SETERRNO(EBADF,RMS_IFI);
1248 Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
1250 int mode = O_BINARY;
1251 PERL_UNUSED_CONTEXT;
1257 if (s[2] == 'a' && s[3] == 'w'
1258 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1267 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1268 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1277 goto fail_discipline;
1280 else if (isSPACE(*s)) {
1287 end = strchr(s+1, ':');
1290 #ifndef PERLIO_LAYERS
1291 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1302 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1304 my_chsize(int fd, Off_t length)
1307 /* code courtesy of William Kucharski */
1312 if (PerlLIO_fstat(fd, &filebuf) < 0)
1315 if (filebuf.st_size < length) {
1317 /* extend file length */
1319 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1322 /* write a "0" byte */
1324 if ((PerlLIO_write(fd, "", 1)) != 1)
1328 /* truncate length */
1332 fl.l_start = length;
1333 fl.l_type = F_WRLCK; /* write lock on file space */
1336 * This relies on the UNDOCUMENTED F_FREESP argument to
1337 * fcntl(2), which truncates the file so that it ends at the
1338 * position indicated by fl.l_start.
1340 * Will minor miracles never cease?
1343 if (fcntl(fd, F_FREESP, &fl) < 0)
1349 Perl_croak_nocontext("truncate not implemented");
1350 #endif /* F_FREESP */
1353 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1356 Perl_do_print(pTHX_ SV *sv, PerlIO *fp)
1358 PERL_ARGS_ASSERT_DO_PRINT;
1360 /* assuming fp is checked earlier */
1363 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
1364 assert(!SvGMAGICAL(sv));
1366 PerlIO_printf(fp, "%" UVuf, (UV)SvUVX(sv));
1368 PerlIO_printf(fp, "%" IVdf, (IV)SvIVX(sv));
1369 return !PerlIO_error(fp);
1373 /* Do this first to trigger any overloading. */
1374 const char *tmps = SvPV_const(sv, len);
1378 if (PerlIO_isutf8(fp)) { /* If the stream is utf8 ... */
1379 if (!SvUTF8(sv)) { /* Convert to utf8 if necessary */
1380 /* We don't modify the original scalar. */
1381 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1382 tmps = (char *) tmpbuf;
1384 else if (ckWARN4_d(WARN_UTF8, WARN_SURROGATE, WARN_NON_UNICODE, WARN_NONCHAR)) {
1385 (void) check_utf8_print((const U8*) tmps, len);
1387 } /* else stream isn't utf8 */
1388 else if (DO_UTF8(sv)) { /* But if is utf8 internally, attempt to
1390 STRLEN tmplen = len;
1392 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
1395 /* Here, succeeded in downgrading from utf8. Set up to below
1396 * output the converted value */
1398 tmps = (char *) tmpbuf;
1401 else { /* Non-utf8 output stream, but string only representable in
1403 assert((char *)result == tmps);
1404 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
1405 "Wide character in %s",
1406 PL_op ? OP_DESC(PL_op) : "print"
1408 /* Could also check that isn't one of the things to avoid
1409 * in utf8 by using check_utf8_print(), but not doing so,
1410 * since the stream isn't a UTF8 stream */
1413 /* To detect whether the process is about to overstep its
1414 * filesize limit we would need getrlimit(). We could then
1415 * also transparently raise the limit with setrlimit() --
1416 * but only until the system hard limit/the filesystem limit,
1417 * at which we would get EPERM. Note that when using buffered
1418 * io the write failure can be delayed until the flush/close. --jhi */
1419 if (len && (PerlIO_write(fp,tmps,len) == 0))
1422 return happy ? !PerlIO_error(fp) : FALSE;
1427 Perl_my_stat_flags(pTHX_ const U32 flags)
1433 if (PL_op->op_flags & OPf_REF) {
1437 return PL_laststatval;
1440 PL_laststype = OP_STAT;
1441 PL_statgv = gv ? gv : (GV *)io;
1442 SvPVCLEAR(PL_statname);
1445 int fd = PerlIO_fileno(IoIFP(io));
1447 /* E.g. PerlIO::scalar has no real fd. */
1448 return (PL_laststatval = -1);
1450 return (PL_laststatval = PerlLIO_fstat(fd, &PL_statcache));
1452 } else if (IoDIRP(io)) {
1453 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
1456 PL_laststatval = -1;
1460 else if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1462 return PL_laststatval;
1464 SV* const sv = TOPs;
1467 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
1470 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
1471 io = MUTABLE_IO(SvRV(sv));
1473 goto do_fstat_have_io;
1476 s = SvPV_flags_const(sv, len, flags);
1478 sv_setpvn(PL_statname, s, len);
1479 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1480 PL_laststype = OP_STAT;
1481 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1482 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(s)) {
1483 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
1484 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1487 return PL_laststatval;
1493 Perl_my_lstat_flags(pTHX_ const U32 flags)
1495 static const char* const no_prev_lstat = "The stat preceding -l _ wasn't an lstat";
1498 SV* const sv = TOPs;
1500 if (PL_op->op_flags & OPf_REF) {
1501 if (cGVOP_gv == PL_defgv) {
1502 if (PL_laststype != OP_LSTAT)
1503 Perl_croak(aTHX_ "%s", no_prev_lstat);
1504 return PL_laststatval;
1506 PL_laststatval = -1;
1507 if (ckWARN(WARN_IO)) {
1508 /* diag_listed_as: Use of -l on filehandle%s */
1509 Perl_warner(aTHX_ packWARN(WARN_IO),
1510 "Use of -l on filehandle %" HEKf,
1511 HEKfARG(GvENAME_HEK(cGVOP_gv)));
1515 if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1517 if (PL_laststype != OP_LSTAT)
1518 Perl_croak(aTHX_ "%s", no_prev_lstat);
1519 return PL_laststatval;
1522 PL_laststype = OP_LSTAT;
1524 if ( ( (SvROK(sv) && ( isGV_with_GP(SvRV(sv))
1525 || (isio = SvTYPE(SvRV(sv)) == SVt_PVIO) )
1529 && ckWARN(WARN_IO)) {
1531 /* diag_listed_as: Use of -l on filehandle%s */
1532 Perl_warner(aTHX_ packWARN(WARN_IO),
1533 "Use of -l on filehandle");
1535 /* diag_listed_as: Use of -l on filehandle%s */
1536 Perl_warner(aTHX_ packWARN(WARN_IO),
1537 "Use of -l on filehandle %" HEKf,
1538 HEKfARG(GvENAME_HEK((const GV *)
1539 (SvROK(sv) ? SvRV(sv) : sv))));
1541 file = SvPV_flags_const_nolen(sv, flags);
1542 sv_setpv(PL_statname,file);
1543 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
1544 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(file)) {
1545 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
1546 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1549 return PL_laststatval;
1553 S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1555 const int e = errno;
1556 PERL_ARGS_ASSERT_EXEC_FAILED;
1558 if (ckWARN(WARN_EXEC))
1559 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1562 /* XXX silently ignore failures */
1563 PERL_UNUSED_RESULT(PerlLIO_write(fd, (void*)&e, sizeof(int)));
1569 Perl_do_aexec5(pTHX_ SV *really, SV **mark, SV **sp,
1570 int fd, int do_report)
1573 PERL_ARGS_ASSERT_DO_AEXEC5;
1574 #if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
1575 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1579 const char *tmps = NULL;
1580 Newx(PL_Argv, sp - mark + 1, const char*);
1583 while (++mark <= sp) {
1585 *a++ = SvPV_nolen_const(*mark);
1591 tmps = SvPV_nolen_const(really);
1592 if ((!really && *PL_Argv[0] != '/') ||
1593 (really && *tmps != '/')) /* will execvp use PATH? */
1594 TAINT_ENV(); /* testing IFS here is overkill, probably */
1596 if (really && *tmps) {
1597 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1599 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1602 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
1610 Perl_do_execfree(pTHX)
1618 #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
1621 Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
1628 /* Make a copy so we can change it */
1629 const Size_t cmdlen = strlen(incmd) + 1;
1631 PERL_ARGS_ASSERT_DO_EXEC3;
1633 Newx(buf, cmdlen, char);
1635 memcpy(cmd, incmd, cmdlen);
1637 while (*cmd && isSPACE(*cmd))
1640 /* save an extra exec if possible */
1644 char flags[PERL_FLAGS_MAX];
1645 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1646 strEQs(cmd+PL_cshlen," -c")) {
1647 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
1648 s = cmd+PL_cshlen+3;
1651 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
1656 char * const ncmd = s;
1662 if (s[-1] == '\'') {
1665 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
1668 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
1677 /* see if there are shell metacharacters in it */
1679 if (*cmd == '.' && isSPACE(cmd[1]))
1682 if (strEQs(cmd,"exec") && isSPACE(cmd[4]))
1686 while (isWORDCHAR(*s))
1687 s++; /* catch VAR=val gizmo */
1691 for (s = cmd; *s; s++) {
1692 if (*s != ' ' && !isALPHA(*s) &&
1693 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1694 if (*s == '\n' && !s[1]) {
1698 /* handle the 2>&1 construct at the end */
1699 if (*s == '>' && s[1] == '&' && s[2] == '1'
1700 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1701 && (!s[3] || isSPACE(s[3])))
1703 const char *t = s + 3;
1705 while (*t && isSPACE(*t))
1707 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1714 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
1716 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
1722 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*);
1723 PL_Cmd = savepvn(cmd, s-cmd);
1725 for (s = PL_Cmd; *s;) {
1730 while (*s && !isSPACE(*s))
1738 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1740 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1744 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
1751 #endif /* OS2 || WIN32 */
1754 Perl_apply(pTHX_ I32 type, SV **mark, SV **sp)
1758 const char *const what = PL_op_name[type];
1761 SV ** const oldmark = mark;
1762 bool killgp = FALSE;
1764 PERL_ARGS_ASSERT_APPLY;
1766 PERL_UNUSED_VAR(what); /* may not be used depending on compile options */
1768 /* Doing this ahead of the switch statement preserves the old behaviour,
1769 where attempting to use kill as a taint test test would fail on
1770 platforms where kill was not defined. */
1772 if (type == OP_KILL)
1773 Perl_die(aTHX_ PL_no_func, what);
1776 if (type == OP_CHOWN)
1777 Perl_die(aTHX_ PL_no_func, what);
1781 #define APPLY_TAINT_PROPER() \
1783 if (TAINT_get) { TAINT_PROPER(what); } \
1786 /* This is a first heuristic; it doesn't catch tainting magic. */
1788 while (++mark <= sp) {
1789 if (SvTAINTED(*mark)) {
1798 APPLY_TAINT_PROPER();
1801 APPLY_TAINT_PROPER();
1803 while (++mark <= sp) {
1805 if ((gv = MAYBE_DEREF_GV(*mark))) {
1806 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1808 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
1809 APPLY_TAINT_PROPER();
1811 SETERRNO(EBADF,RMS_IFI);
1813 } else if (fchmod(fd, val))
1816 Perl_die(aTHX_ PL_no_func, "fchmod");
1820 SETERRNO(EBADF,RMS_IFI);
1825 const char *name = SvPV_nomg_const(*mark, len);
1826 APPLY_TAINT_PROPER();
1827 if (!IS_SAFE_PATHNAME(name, len, "chmod") ||
1828 PerlLIO_chmod(name, val)) {
1837 APPLY_TAINT_PROPER();
1838 if (sp - mark > 2) {
1840 val = SvIVx(*++mark);
1841 val2 = SvIVx(*++mark);
1842 APPLY_TAINT_PROPER();
1844 while (++mark <= sp) {
1846 if ((gv = MAYBE_DEREF_GV(*mark))) {
1847 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1849 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
1850 APPLY_TAINT_PROPER();
1852 SETERRNO(EBADF,RMS_IFI);
1854 } else if (fchown(fd, val, val2))
1857 Perl_die(aTHX_ PL_no_func, "fchown");
1861 SETERRNO(EBADF,RMS_IFI);
1866 const char *name = SvPV_nomg_const(*mark, len);
1867 APPLY_TAINT_PROPER();
1868 if (!IS_SAFE_PATHNAME(name, len, "chown") ||
1869 PerlLIO_chown(name, val, val2)) {
1878 XXX Should we make lchown() directly available from perl?
1879 For now, we'll let Configure test for HAS_LCHOWN, but do
1880 nothing in the core.
1885 APPLY_TAINT_PROPER();
1888 s = SvPVx_const(*++mark, len);
1889 if (*s == '-' && isALPHA(s[1]))
1896 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
1900 if ((val = whichsig_pvn(s, len)) < 0)
1901 Perl_croak(aTHX_ "Unrecognized signal name \"%" SVf "\"",
1913 APPLY_TAINT_PROPER();
1916 while (++mark <= sp) {
1919 if (!(SvNIOK(*mark) || looks_like_number(*mark)))
1920 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1921 proc = SvIV_nomg(*mark);
1922 APPLY_TAINT_PROPER();
1924 /* use killpg in preference, as the killpg() wrapper for Win32
1925 * understands process groups, but the kill() wrapper doesn't */
1926 if (killgp ? PerlProc_killpg(proc, val)
1927 : PerlProc_kill(proc, val))
1929 if (PerlProc_kill(killgp ? -proc: proc, val))
1937 APPLY_TAINT_PROPER();
1939 while (++mark <= sp) {
1940 s = SvPV_const(*mark, len);
1941 APPLY_TAINT_PROPER();
1942 if (!IS_SAFE_PATHNAME(s, len, "unlink")) {
1945 else if (PL_unsafe) {
1950 #if defined(__amigaos4__) && defined(NEWLIB)
1953 /* Under AmigaOS4 unlink only 'fails' if the
1954 * filename is invalid. It may not remove the file
1955 * if it's locked, so check if it's still around. */
1956 if ((access(s,F_OK) != -1))
1963 else { /* don't let root wipe out directories without -U */
1965 if (PerlLIO_lstat(s, &statbuf) < 0)
1967 else if (S_ISDIR(statbuf.st_mode)) {
1968 SETERRNO(EISDIR, SS_NOPRIV);
1976 #if defined(__amigaos4__) && defined(NEWLIB)
1979 /* Under AmigaOS4 unlink only 'fails' if the filename is invalid */
1980 /* It may not remove the file if it's Locked, so check if it's still */
1982 if((access(s,F_OK) != -1))
1992 #if defined(HAS_UTIME) || defined(HAS_FUTIMES)
1994 APPLY_TAINT_PROPER();
1995 if (sp - mark > 2) {
1996 #if defined(HAS_FUTIMES)
1997 struct timeval utbuf[2];
1998 void *utbufp = utbuf;
1999 #elif defined(I_UTIME) || defined(VMS)
2000 struct utimbuf utbuf;
2001 struct utimbuf *utbufp = &utbuf;
2007 void *utbufp = &utbuf;
2010 SV* const accessed = *++mark;
2011 SV* const modified = *++mark;
2013 /* Be like C, and if both times are undefined, let the C
2014 * library figure out what to do. This usually means
2015 * "current time". */
2017 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
2020 Zero(&utbuf, sizeof utbuf, char);
2022 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
2023 utbuf[0].tv_usec = 0;
2024 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
2025 utbuf[1].tv_usec = 0;
2026 #elif defined(BIG_TIME)
2027 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
2028 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
2030 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
2031 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
2034 APPLY_TAINT_PROPER();
2036 while (++mark <= sp) {
2038 if ((gv = MAYBE_DEREF_GV(*mark))) {
2039 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
2041 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
2042 APPLY_TAINT_PROPER();
2044 SETERRNO(EBADF,RMS_IFI);
2046 } else if (futimes(fd, (struct timeval *) utbufp))
2049 Perl_die(aTHX_ PL_no_func, "futimes");
2057 const char * const name = SvPV_nomg_const(*mark, len);
2058 APPLY_TAINT_PROPER();
2059 if (!IS_SAFE_PATHNAME(name, len, "utime")) {
2064 if (utimes(name, (struct timeval *)utbufp))
2066 if (PerlLIO_utime(name, utbufp))
2080 #undef APPLY_TAINT_PROPER
2083 /* Do the permissions in *statbufp allow some operation? */
2084 #ifndef VMS /* VMS' cando is in vms.c */
2086 Perl_cando(pTHX_ Mode_t mode, bool effective, const Stat_t *statbufp)
2087 /* effective is a flag, true for EUID, or for checking if the effective gid
2088 * is in the list of groups returned from getgroups().
2091 PERL_ARGS_ASSERT_CANDO;
2092 PERL_UNUSED_CONTEXT;
2095 /* [Comments and code from Len Reed]
2096 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
2097 * to write-protected files. The execute permission bit is set
2098 * by the Microsoft C library stat() function for the following:
2103 * All files and directories are readable.
2104 * Directories and special files, e.g. "CON", cannot be
2106 * [Comment by Tom Dinger -- a directory can have the write-protect
2107 * bit set in the file system, but DOS permits changes to
2108 * the directory anyway. In addition, all bets are off
2109 * here for networked software, such as Novell and
2113 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
2114 * too so it will actually look into the files for magic numbers
2116 return cBOOL(mode & statbufp->st_mode);
2118 #else /* ! DOSISH */
2120 if (ingroup(544,effective)) { /* member of Administrators */
2122 if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 0) { /* root is special */
2124 if (mode == S_IXUSR) {
2125 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
2129 return TRUE; /* root reads and writes anything */
2132 if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) {
2133 if (statbufp->st_mode & mode)
2134 return TRUE; /* ok as "user" */
2136 else if (ingroup(statbufp->st_gid,effective)) {
2137 if (statbufp->st_mode & mode >> 3)
2138 return TRUE; /* ok as "group" */
2140 else if (statbufp->st_mode & mode >> 6)
2141 return TRUE; /* ok as "other" */
2143 #endif /* ! DOSISH */
2148 S_ingroup(pTHX_ Gid_t testgid, bool effective)
2150 #ifndef PERL_IMPLICIT_SYS
2151 /* PERL_IMPLICIT_SYS like Win32: getegid() etc. require the context. */
2152 PERL_UNUSED_CONTEXT;
2154 if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid()))
2156 #ifdef HAS_GETGROUPS
2158 Groups_t *gary = NULL;
2162 anum = getgroups(0, gary);
2164 Newx(gary, anum, Groups_t);
2165 anum = getgroups(anum, gary);
2167 if (gary[anum] == testgid) {
2181 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
2184 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
2186 const key_t key = (key_t)SvNVx(*++mark);
2187 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
2188 const I32 flags = SvIVx(*++mark);
2190 PERL_ARGS_ASSERT_DO_IPCGET;
2191 PERL_UNUSED_ARG(sp);
2198 return msgget(key, flags);
2202 return semget(key, (int) SvIV(nsv), flags);
2206 return shmget(key, (size_t) SvUV(nsv), flags);
2208 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2210 /* diag_listed_as: msg%s not implemented */
2211 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2214 return -1; /* should never happen */
2218 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
2222 const I32 id = SvIVx(*++mark);
2224 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
2226 const I32 cmd = SvIVx(*++mark);
2227 SV * const astr = *++mark;
2228 STRLEN infosize = 0;
2229 I32 getinfo = (cmd == IPC_STAT);
2231 PERL_ARGS_ASSERT_DO_IPCCTL;
2232 PERL_UNUSED_ARG(sp);
2238 if (cmd == IPC_STAT || cmd == IPC_SET)
2239 infosize = sizeof(struct msqid_ds);
2244 if (cmd == IPC_STAT || cmd == IPC_SET)
2245 infosize = sizeof(struct shmid_ds);
2251 if (cmd == IPC_STAT || cmd == IPC_SET)
2252 infosize = sizeof(struct semid_ds);
2253 else if (cmd == GETALL || cmd == SETALL)
2255 struct semid_ds semds;
2257 #ifdef EXTRA_F_IN_SEMUN_BUF
2258 semun.buff = &semds;
2262 getinfo = (cmd == GETALL);
2263 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2265 infosize = semds.sem_nsems * sizeof(short);
2266 /* "short" is technically wrong but much more portable
2267 than guessing about u_?short(_t)? */
2270 /* diag_listed_as: sem%s not implemented */
2271 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2275 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2277 /* diag_listed_as: shm%s not implemented */
2278 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2286 SvPV_force_nolen(astr);
2287 a = SvGROW(astr, infosize+1);
2292 a = SvPV(astr, len);
2293 if (len != infosize)
2294 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2302 const IV i = SvIV(astr);
2303 a = INT2PTR(char *,i); /* ouch */
2310 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2316 union semun unsemds;
2319 unsemds.val = PTR2nat(a);
2322 #ifdef EXTRA_F_IN_SEMUN_BUF
2323 unsemds.buff = (struct semid_ds *)a;
2325 unsemds.buf = (struct semid_ds *)a;
2328 ret = Semctl(id, n, cmd, unsemds);
2330 /* diag_listed_as: sem%s not implemented */
2331 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2338 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2342 if (getinfo && ret >= 0) {
2343 SvCUR_set(astr, infosize);
2344 *SvEND(astr) = '\0';
2351 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2355 const I32 id = SvIVx(*++mark);
2356 SV * const mstr = *++mark;
2357 const I32 flags = SvIVx(*++mark);
2358 const char * const mbuf = SvPV_const(mstr, len);
2359 const I32 msize = len - sizeof(long);
2361 PERL_ARGS_ASSERT_DO_MSGSND;
2362 PERL_UNUSED_ARG(sp);
2365 Perl_croak(aTHX_ "Arg too short for msgsnd");
2367 if (id >= 0 && flags >= 0) {
2368 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2370 SETERRNO(EINVAL,LIB_INVARG);
2374 PERL_UNUSED_ARG(sp);
2375 PERL_UNUSED_ARG(mark);
2376 /* diag_listed_as: msg%s not implemented */
2377 Perl_croak(aTHX_ "msgsnd not implemented");
2383 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2388 I32 msize, flags, ret;
2389 const I32 id = SvIVx(*++mark);
2390 SV * const mstr = *++mark;
2392 PERL_ARGS_ASSERT_DO_MSGRCV;
2393 PERL_UNUSED_ARG(sp);
2395 /* suppress warning when reading into undef var --jhi */
2398 msize = SvIVx(*++mark);
2399 mtype = (long)SvIVx(*++mark);
2400 flags = SvIVx(*++mark);
2401 SvPV_force_nolen(mstr);
2402 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2405 if (id >= 0 && msize >= 0 && flags >= 0) {
2406 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2408 SETERRNO(EINVAL,LIB_INVARG);
2412 SvCUR_set(mstr, sizeof(long)+ret);
2413 *SvEND(mstr) = '\0';
2414 /* who knows who has been playing with this message? */
2419 PERL_UNUSED_ARG(sp);
2420 PERL_UNUSED_ARG(mark);
2421 /* diag_listed_as: msg%s not implemented */
2422 Perl_croak(aTHX_ "msgrcv not implemented");
2428 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2432 const I32 id = SvIVx(*++mark);
2433 SV * const opstr = *++mark;
2434 const char * const opbuf = SvPV_const(opstr, opsize);
2436 PERL_ARGS_ASSERT_DO_SEMOP;
2437 PERL_UNUSED_ARG(sp);
2439 if (opsize < 3 * SHORTSIZE
2440 || (opsize % (3 * SHORTSIZE))) {
2441 SETERRNO(EINVAL,LIB_INVARG);
2445 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2447 const int nsops = opsize / (3 * sizeof (short));
2449 short * const ops = (short *) opbuf;
2451 struct sembuf *temps, *t;
2454 Newx (temps, nsops, struct sembuf);
2462 result = semop(id, temps, nsops);
2467 /* diag_listed_as: sem%s not implemented */
2468 Perl_croak(aTHX_ "semop not implemented");
2473 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2477 struct shmid_ds shmds;
2478 const I32 id = SvIVx(*++mark);
2479 SV * const mstr = *++mark;
2480 const I32 mpos = SvIVx(*++mark);
2481 const I32 msize = SvIVx(*++mark);
2483 PERL_ARGS_ASSERT_DO_SHMIO;
2484 PERL_UNUSED_ARG(sp);
2487 if (shmctl(id, IPC_STAT, &shmds) == -1)
2489 if (mpos < 0 || msize < 0
2490 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
2491 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2495 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2497 SETERRNO(EINVAL,LIB_INVARG);
2500 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2502 if (optype == OP_SHMREAD) {
2504 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2506 SvUPGRADE(mstr, SVt_PV);
2510 mbuf = SvGROW(mstr, (STRLEN)msize+1);
2512 Copy(shm + mpos, mbuf, msize, char);
2513 SvCUR_set(mstr, msize);
2514 *SvEND(mstr) = '\0';
2516 /* who knows who has been playing with this shared memory? */
2522 const char *mbuf = SvPV_const(mstr, len);
2523 const I32 n = ((I32)len > msize) ? msize : (I32)len;
2524 Copy(mbuf, shm + mpos, n, char);
2526 memzero(shm + mpos + n, msize - n);
2530 /* diag_listed_as: shm%s not implemented */
2531 Perl_croak(aTHX_ "shm I/O not implemented");
2536 #endif /* SYSV IPC */
2541 =for apidoc start_glob
2543 Function called by C<do_readline> to spawn a glob (or do the glob inside
2544 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2545 this glob starter is only used by miniperl during the build process,
2546 or when PERL_EXTERNAL_GLOB is defined.
2547 Moving it away shrinks F<pp_hot.c>; shrinking F<pp_hot.c> helps speed perl up.
2553 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2555 SV * const tmpcmd = newSV(0);
2558 const char *s = SvPV(tmpglob, len);
2560 PERL_ARGS_ASSERT_START_GLOB;
2562 if (!IS_SAFE_SYSCALL(s, len, "pattern", "glob"))
2567 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2568 /* since spawning off a process is a real performance hit */
2575 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
2580 sv_setpv(tmpcmd, "for a in ");
2581 sv_catsv(tmpcmd, tmpglob);
2582 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2585 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2586 sv_catsv(tmpcmd, tmpglob);
2588 sv_setpv(tmpcmd, "perlglob ");
2589 sv_catsv(tmpcmd, tmpglob);
2590 sv_catpv(tmpcmd, " |");
2595 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2596 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2597 sv_catsv(tmpcmd, tmpglob);
2598 sv_catpv(tmpcmd, "' 2>/dev/null |");
2600 sv_setpv(tmpcmd, "echo ");
2601 sv_catsv(tmpcmd, tmpglob);
2602 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2604 #endif /* !DOSISH */
2606 SV ** const svp = hv_fetchs(GvHVn(PL_envgv), "LS_COLORS", 0);
2608 save_helem_flags(GvHV(PL_envgv),
2609 newSVpvs_flags("LS_COLORS", SVs_TEMP), svp,
2612 (void)do_open6(PL_last_in_gv, SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2618 if (!fp && ckWARN(WARN_GLOB)) {
2619 Perl_warner(aTHX_ packWARN(WARN_GLOB), "glob failed (can't start child: %s)",
2627 * ex: set ts=8 sts=4 sw=4 et: