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" properly.\n",
114 HEKfARG(GvENAME_HEK(gv))
119 IoOFP(io) = IoIFP(io) = NULL;
125 Perl_do_openn(pTHX_ GV *gv, const char *oname, I32 len, int as_raw,
126 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
129 PERL_ARGS_ASSERT_DO_OPENN;
132 /* sysopen style args, i.e. integer mode and permissions */
135 Perl_croak(aTHX_ "panic: sysopen with multiple args, num_svs=%ld",
138 return do_open_raw(gv, oname, len, rawmode, rawperm);
140 return do_open6(gv, oname, len, supplied_fp, svp, num_svs);
144 Perl_do_open_raw(pTHX_ GV *gv, const char *oname, STRLEN len,
145 int rawmode, int rawperm)
151 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
152 IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype);
156 PERL_ARGS_ASSERT_DO_OPEN_RAW;
158 /* For ease of blame back to 5.000, keep the existing indenting. */
160 /* sysopen style args, i.e. integer mode and permissions */
162 const int appendtrunc =
164 #ifdef O_APPEND /* Not fully portable. */
167 #ifdef O_TRUNC /* Not fully portable. */
171 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
181 It might be (in OS/390 and Mac OS Classic it is)
187 This means that simple & with O_RDWR would look
188 like O_RDONLY is present. Therefore we have to
191 if ((ismodifying = (rawmode & modifyingmode))) {
192 if ((ismodifying & O_WRONLY) == O_WRONLY ||
193 (ismodifying & O_RDWR) == O_RDWR ||
194 (ismodifying & (O_CREAT|appendtrunc)))
195 TAINT_PROPER("sysopen");
197 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
199 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
200 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
203 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
205 namesv = newSVpvn_flags(oname, len, SVs_TEMP);
206 fp = PerlIO_openn(aTHX_ NULL, mode, -1, rawmode, rawperm, NULL, 1, &namesv);
208 return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd,
209 savetype, writing, 0, NULL);
213 Perl_do_open6(pTHX_ GV *gv, const char *oname, STRLEN len,
214 PerlIO *supplied_fp, SV **svp, U32 num_svs)
220 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
221 IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype);
224 bool was_fdopen = FALSE;
227 PERL_ARGS_ASSERT_DO_OPEN6;
229 /* For ease of blame back to 5.000, keep the existing indenting. */
231 /* Regular (non-sys) open */
236 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
238 /* Collect default raw/crlf info from the op */
239 if (PL_op && PL_op->op_type == OP_OPEN) {
240 /* set up IO layers */
241 const U8 flags = PL_op->op_private;
242 in_raw = (flags & OPpOPEN_IN_RAW);
243 in_crlf = (flags & OPpOPEN_IN_CRLF);
244 out_raw = (flags & OPpOPEN_OUT_RAW);
245 out_crlf = (flags & OPpOPEN_OUT_CRLF);
248 type = savepvn(oname, len);
252 /* Lose leading and trailing white space */
253 while (isSPACE(*type))
255 while (tend > type && isSPACE(tend[-1]))
261 /* New style explicit name, type is just mode and layer info */
263 if (SvROK(*svp) && !strchr(oname,'&')) {
265 Perl_warner(aTHX_ packWARN(WARN_IO),
266 "Can't open a reference");
267 SETERRNO(EINVAL, LIB_INVARG);
271 #endif /* USE_STDIO */
272 p = (SvOK(*svp) || SvGMAGICAL(*svp)) ? SvPV(*svp, nlen) : NULL;
274 if (p && !IS_SAFE_PATHNAME(p, nlen, "open")) {
279 name = p ? savepvn(p, nlen) : savepvs("");
288 if ((*type == IoTYPE_RDWR) && /* scary */
289 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
290 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
291 TAINT_PROPER("open");
296 if (*type == IoTYPE_PIPE) {
298 if (type[1] != IoTYPE_STD) {
300 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
306 } while (isSPACE(*type));
312 /* command is missing 19990114 */
313 if (ckWARN(WARN_PIPE))
314 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
319 if (!(*name == '-' && name[1] == '\0') || num_svs)
321 TAINT_PROPER("piped open");
322 if (!num_svs && name[len-1] == '|') {
324 if (ckWARN(WARN_PIPE))
325 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
334 fp = PerlProc_popen_list(mode, num_svs, svp);
337 fp = PerlProc_popen(name,mode);
341 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
348 else if (*type == IoTYPE_WRONLY) {
349 TAINT_PROPER("open");
351 if (*type == IoTYPE_WRONLY) {
352 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
353 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
367 dodup = PERLIO_DUP_FD;
373 if (!num_svs && !*type && supplied_fp) {
374 /* "<+&" etc. is used by typemaps */
378 PerlIO *that_fp = NULL;
382 /* diag_listed_as: More than one argument to '%s' open */
383 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
385 while (isSPACE(*type))
389 || (SvPOKp(*svp) && looks_like_number(*svp))
391 wanted_fd = SvUV(*svp);
394 else if (isDIGIT(*type)
395 && grok_atoUV(type, &uv, NULL)
403 thatio = sv_2io(*svp);
406 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
408 thatio = GvIO(thatgv);
412 SETERRNO(EINVAL,SS_IVCHAN);
417 if ((that_fp = IoIFP(thatio))) {
418 /* Flush stdio buffer before dup. --mjd
419 * Unfortunately SEEK_CURing 0 seems to
420 * be optimized away on most platforms;
421 * only Solaris and Linux seem to flush
423 /* On the other hand, do all platforms
424 * take gracefully to flushing a read-only
425 * filehandle? Perhaps we should do
426 * fsetpos(src)+fgetpos(dst)? --nik */
427 PerlIO_flush(that_fp);
428 wanted_fd = PerlIO_fileno(that_fp);
429 /* When dup()ing STDIN, STDOUT or STDERR
430 * explicitly set appropriate access mode */
431 if (that_fp == PerlIO_stdout()
432 || that_fp == PerlIO_stderr())
433 IoTYPE(io) = IoTYPE_WRONLY;
434 else if (that_fp == PerlIO_stdin())
435 IoTYPE(io) = IoTYPE_RDONLY;
436 /* When dup()ing a socket, say result is
438 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
439 IoTYPE(io) = IoTYPE_SOCKET;
442 SETERRNO(EBADF, RMS_IFI);
450 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
454 wanted_fd = PerlLIO_dup(wanted_fd);
457 if (!(fp = PerlIO_openn(aTHX_ type,mode,wanted_fd,0,0,NULL,num_svs,svp))) {
458 if (dodup && wanted_fd >= 0)
459 PerlLIO_close(wanted_fd);
465 while (isSPACE(*type))
467 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
469 fp = PerlIO_stdout();
470 IoTYPE(io) = IoTYPE_STD;
472 /* diag_listed_as: More than one argument to '%s' open */
473 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
478 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
481 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
483 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
487 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
488 goto unknown_open_mode;
489 } /* IoTYPE_WRONLY */
490 else if (*type == IoTYPE_RDONLY) {
493 } while (isSPACE(*type));
502 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
505 IoTYPE(io) = IoTYPE_STD;
507 /* diag_listed_as: More than one argument to '%s' open */
508 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
513 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
516 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
518 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
521 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
522 goto unknown_open_mode;
523 } /* IoTYPE_RDONLY */
524 else if ((num_svs && /* '-|...' or '...|' */
525 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
526 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
528 type += 2; /* skip over '-|' */
532 while (tend > type && isSPACE(tend[-1]))
534 for (; isSPACE(*type); type++)
540 /* command is missing 19990114 */
541 if (ckWARN(WARN_PIPE))
542 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
547 if (!(*name == '-' && name[1] == '\0') || num_svs)
549 TAINT_PROPER("piped open");
558 fp = PerlProc_popen_list(mode,num_svs,svp);
561 fp = PerlProc_popen(name,mode);
563 IoTYPE(io) = IoTYPE_PIPE;
565 while (isSPACE(*type))
568 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
575 else { /* layer(Args) */
577 goto unknown_open_mode;
579 IoTYPE(io) = IoTYPE_RDONLY;
580 for (; isSPACE(*name); name++)
589 if (*name == '-' && name[1] == '\0') {
591 IoTYPE(io) = IoTYPE_STD;
595 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
598 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
600 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
607 return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd,
608 savetype, writing, was_fdopen, type);
611 /* Yes, this is ugly, but it's private, and I don't see a cleaner way to
612 simplify the two-headed public interface of do_openn. */
614 S_openn_cleanup(pTHX_ GV *gv, IO *io, PerlIO *fp, char *mode, const char *oname,
615 PerlIO *saveifp, PerlIO *saveofp, int savefd, char savetype,
616 int writing, bool was_fdopen, const char *type)
620 PERL_ARGS_ASSERT_OPENN_CLEANUP;
623 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
624 && should_warn_nl(oname)
628 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
629 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
635 if (ckWARN(WARN_IO)) {
636 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
637 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
638 Perl_warner(aTHX_ packWARN(WARN_IO),
639 "Filehandle STD%s reopened as %"HEKf
641 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
642 HEKfARG(GvENAME_HEK(gv)));
644 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
645 Perl_warner(aTHX_ packWARN(WARN_IO),
646 "Filehandle STDIN reopened as %"HEKf" only for output",
647 HEKfARG(GvENAME_HEK(gv))
652 fd = PerlIO_fileno(fp);
653 /* Do NOT do: "if (fd < 0) goto say_false;" here. If there is no
654 * fd assume it isn't a socket - this covers PerlIO::scalar -
655 * otherwise unless we "know" the type probe for socket-ness.
657 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
658 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
659 /* If PerlIO claims to have fd we had better be able to fstat() it. */
660 (void) PerlIO_close(fp);
664 if (S_ISSOCK(PL_statbuf.st_mode))
665 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
668 !(PL_statbuf.st_mode & S_IFMT)
669 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
670 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
671 ) { /* on OS's that return 0 on fstat()ed pipe */
673 Sock_size_t buflen = sizeof tmpbuf;
674 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
675 || errno != ENOTSOCK)
676 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
677 /* but some return 0 for streams too, sigh */
679 #endif /* HAS_SOCKET */
680 #endif /* !PERL_MICRO */
684 * If this is a standard handle we discard all the layer stuff
685 * and just dup the fd into whatever was on the handle before !
688 if (saveifp) { /* must use old fp? */
689 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
690 then dup the new fileno down
693 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
694 if (saveofp != saveifp) { /* was a socket? */
695 PerlIO_close(saveofp);
699 /* Still a small can-of-worms here if (say) PerlIO::scalar
700 is assigned to (say) STDOUT - for now let dup2() fail
701 and provide the error
704 SETERRNO(EBADF,RMS_IFI);
706 } else if (PerlLIO_dup2(fd, savefd) < 0) {
707 (void)PerlIO_close(fp);
711 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
712 char newname[FILENAME_MAX+1];
713 if (PerlIO_getname(fp, newname)) {
714 if (fd == PerlIO_fileno(PerlIO_stdout()))
715 vmssetuserlnm("SYS$OUTPUT", newname);
716 if (fd == PerlIO_fileno(PerlIO_stderr()))
717 vmssetuserlnm("SYS$ERROR", newname);
723 /* PL_fdpid isn't used on Windows, so avoid this useless work.
724 * XXX Probably the same for a lot of other places. */
729 sv = *av_fetch(PL_fdpid,fd,TRUE);
730 SvUPGRADE(sv, SVt_IV);
733 sv = *av_fetch(PL_fdpid,savefd,TRUE);
734 SvUPGRADE(sv, SVt_IV);
740 /* need to close fp without closing underlying fd */
741 int ofd = PerlIO_fileno(fp);
742 int dupfd = ofd >= 0 ? PerlLIO_dup(ofd) : -1;
743 #if defined(HAS_FCNTL) && defined(F_SETFD)
744 /* Assume if we have F_SETFD we have F_GETFD. */
745 /* Get a copy of all the fd flags. */
746 int fd_flags = ofd >= 0 ? fcntl(ofd, F_GETFD) : -1;
749 PerlLIO_close(dupfd);
753 if (ofd < 0 || dupfd < 0) {
755 PerlLIO_close(dupfd);
759 PerlLIO_dup2(dupfd, ofd);
760 #if defined(HAS_FCNTL) && defined(F_SETFD)
761 /* The dup trick has lost close-on-exec on ofd,
762 * and possibly any other flags, so restore them. */
763 fcntl(ofd,F_SETFD, fd_flags);
765 PerlLIO_close(dupfd);
772 fd = PerlIO_fileno(fp);
774 #if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
775 if (fd >= 0 && fd > PL_maxsysfd && fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) {
782 IoFLAGS(io) &= ~IOf_NOLINE;
784 if (IoTYPE(io) == IoTYPE_SOCKET
785 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
787 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
790 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,NULL))) {
803 IoTYPE(io) = savetype;
808 Perl_nextargv(pTHX_ GV *gv, bool nomagicopen)
810 IO * const io = GvIOp(gv);
811 SV *const old_out_name = PL_inplace ? newSVsv(GvSV(gv)) : NULL;
813 PERL_ARGS_ASSERT_NEXTARGV;
816 SAVEFREESV(old_out_name);
819 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
820 if (io && (IoFLAGS(io) & (IOf_ARGV|IOf_START)) == (IOf_ARGV|IOf_START)) {
821 IoFLAGS(io) &= ~IOf_START;
824 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
825 SvREFCNT_inc_simple_NN(PL_defoutgv));
828 if (PL_filemode & (S_ISUID|S_ISGID)) {
829 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
832 (void)fchmod(PL_lastfd,PL_filemode);
834 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
841 while (av_tindex(GvAV(gv)) >= 0) {
844 SV *const sv = av_shift(GvAV(gv));
846 SvTAINTED_off(GvSVn(gv)); /* previous tainting irrelevant */
847 sv_setsv(GvSVn(gv),sv);
848 SvSETMAGIC(GvSV(gv));
849 PL_oldname = SvPVx(GvSV(gv), oldlen);
850 if (LIKELY(!PL_inplace)) {
852 ? do_open6(gv, "<", 1, NULL, &GvSV(gv), 1)
853 : do_open6(gv, PL_oldname, oldlen, NULL, NULL, 0)
855 return IoIFP(GvIOp(gv));
860 IO * const io = GvIOp(PL_argvoutgv);
861 if (io && IoIFP(io) && old_out_name && !io_close(io, PL_argvoutgv, FALSE, FALSE)) {
862 Perl_croak(aTHX_ "Failed to close in-place edit file %"SVf": %s\n",
863 old_out_name, Strerror(errno));
866 /* This very long block ends with return IoIFP(GvIOp(gv));
867 Both this block and the block above fall through on open
868 failure to the warning code, and then the while loop above tries
870 if (do_open_raw(gv, PL_oldname, oldlen, O_RDONLY, 0)) {
871 #ifndef FLEXFILENAMES
878 TAINT_PROPER("inplace open");
879 if (oldlen == 1 && *PL_oldname == '-') {
880 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
882 return IoIFP(GvIOp(gv));
884 #ifndef FLEXFILENAMES
885 filedev = PL_statbuf.st_dev;
886 fileino = PL_statbuf.st_ino;
888 PL_filemode = PL_statbuf.st_mode;
889 fileuid = PL_statbuf.st_uid;
890 filegid = PL_statbuf.st_gid;
891 if (!S_ISREG(PL_filemode)) {
892 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
893 "Can't do inplace edit: %s is not a regular file",
898 if (*PL_inplace && strNE(PL_inplace, "*")) {
899 const char *star = strchr(PL_inplace, '*');
901 const char *begin = PL_inplace;
904 sv_catpvn(sv, begin, star - begin);
905 sv_catpvn(sv, PL_oldname, oldlen);
907 } while ((star = strchr(begin, '*')));
912 sv_catpv(sv,PL_inplace);
914 #ifndef FLEXFILENAMES
915 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
916 && PL_statbuf.st_dev == filedev
917 && PL_statbuf.st_ino == fileino)
919 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
923 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
924 "Can't do inplace edit: %"SVf" would not be unique",
931 #if !defined(DOSISH) && !defined(__CYGWIN__)
932 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
933 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
934 "Can't rename %s to %"SVf": %s, skipping file",
935 PL_oldname, SVfARG(sv), Strerror(errno));
941 (void)PerlLIO_unlink(SvPVX_const(sv));
942 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
943 do_open_raw(gv, SvPVX_const(sv), SvCUR(sv), O_RDONLY, 0);
946 (void)UNLINK(SvPVX_const(sv));
947 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
948 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
949 "Can't rename %s to %"SVf": %s, skipping file",
950 PL_oldname, SVfARG(sv), Strerror(errno) );
954 (void)UNLINK(PL_oldname);
958 #if !defined(DOSISH) && !defined(__amigaos4__)
959 # ifndef VMS /* Don't delete; use automatic file versioning */
960 if (UNLINK(PL_oldname) < 0) {
961 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
962 "Can't remove %s: %s, skipping file",
963 PL_oldname, Strerror(errno) );
969 Perl_croak(aTHX_ "Can't do inplace edit without backup");
973 sv_setpvn(sv,PL_oldname,oldlen);
974 SETERRNO(0,0); /* in case sprintf set errno */
975 if (!Perl_do_open_raw(aTHX_ PL_argvoutgv, SvPVX_const(sv),
978 O_WRONLY|O_CREAT|O_TRUNC, 0
980 O_WRONLY|O_CREAT|OPEN_EXCL, 0600
983 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
984 PL_oldname, Strerror(errno) );
988 setdefout(PL_argvoutgv);
989 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
990 if (PL_lastfd >= 0) {
991 (void)PerlLIO_fstat(PL_lastfd,&statbuf);
993 (void)fchmod(PL_lastfd,PL_filemode);
995 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
997 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
998 /* XXX silently ignore failures */
1000 PERL_UNUSED_RESULT(fchown(PL_lastfd,fileuid,filegid));
1003 PERL_UNUSED_RESULT(PerlLIO_chown(PL_oldname,fileuid,filegid));
1008 return IoIFP(GvIOp(gv));
1010 } /* successful do_open_raw(), PL_inplace non-NULL */
1012 if (ckWARN_d(WARN_INPLACE)) {
1013 const int eno = errno;
1014 if (PerlLIO_stat(PL_oldname, &statbuf) >= 0
1015 && !S_ISREG(statbuf.st_mode)) {
1016 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
1017 "Can't do inplace edit: %s is not a regular file",
1021 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
1022 PL_oldname, Strerror(eno));
1026 if (io && (IoFLAGS(io) & IOf_ARGV))
1027 IoFLAGS(io) |= IOf_START;
1030 IO * const io = GvIOp(PL_argvoutgv);
1031 if (io && IoIFP(io) && !io_close(io, PL_argvoutgv, FALSE, FALSE)) {
1032 Perl_croak(aTHX_ "Failed to close in-place edit file %"SVf": %s\n",
1033 old_out_name, Strerror(errno));
1037 /* maybe this is no longer wanted */
1038 (void)do_close(PL_argvoutgv,FALSE);
1040 if (io && (IoFLAGS(io) & IOf_ARGV)
1041 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
1043 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
1045 SvREFCNT_dec_NN(oldout);
1048 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
1053 /* explicit renamed to avoid C++ conflict -- kja */
1055 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
1062 if (!gv || !isGV_with_GP(gv)) {
1064 SETERRNO(EBADF,SS_IVCHAN);
1068 if (!io) { /* never opened */
1071 SETERRNO(EBADF,SS_IVCHAN);
1075 retval = io_close(io, NULL, not_implicit, FALSE);
1079 IoLINES_LEFT(io) = IoPAGE_LEN(io);
1081 IoTYPE(io) = IoTYPE_CLOSED;
1086 Perl_io_close(pTHX_ IO *io, GV *gv, bool not_implicit, bool warn_on_fail)
1088 bool retval = FALSE;
1090 PERL_ARGS_ASSERT_IO_CLOSE;
1093 if (IoTYPE(io) == IoTYPE_PIPE) {
1094 const int status = PerlProc_pclose(IoIFP(io));
1096 STATUS_NATIVE_CHILD_SET(status);
1097 retval = (STATUS_UNIX == 0);
1100 retval = (status != -1);
1103 else if (IoTYPE(io) == IoTYPE_STD)
1106 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
1107 const bool prev_err = PerlIO_error(IoOFP(io));
1110 PerlIO_restore_errno(IoOFP(io));
1112 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
1113 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
1116 const bool prev_err = PerlIO_error(IoIFP(io));
1119 PerlIO_restore_errno(IoIFP(io));
1121 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1124 IoOFP(io) = IoIFP(io) = NULL;
1126 if (warn_on_fail && !retval) {
1128 Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
1129 "Warning: unable to close filehandle %"
1130 HEKf" properly: %"SVf,
1131 HEKfARG(GvNAME_HEK(gv)),
1132 SVfARG(get_sv("!",GV_ADD)));
1134 Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
1135 "Warning: unable to close filehandle "
1137 SVfARG(get_sv("!",GV_ADD)));
1140 else if (not_implicit) {
1141 SETERRNO(EBADF,SS_IVCHAN);
1148 Perl_do_eof(pTHX_ GV *gv)
1150 IO * const io = GvIO(gv);
1152 PERL_ARGS_ASSERT_DO_EOF;
1156 else if (IoTYPE(io) == IoTYPE_WRONLY)
1157 report_wrongway_fh(gv, '>');
1160 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1161 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1162 return FALSE; /* this is the most usual case */
1166 /* getc and ungetc can stomp on errno */
1168 const int ch = PerlIO_getc(IoIFP(io));
1170 (void)PerlIO_ungetc(IoIFP(io),ch);
1177 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1178 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1179 PerlIO_set_cnt(IoIFP(io),-1);
1181 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1182 if (gv != PL_argvgv || !nextargv(gv, FALSE)) /* get another fp handy */
1186 return TRUE; /* normal fp, definitely end of file */
1192 Perl_do_tell(pTHX_ GV *gv)
1194 IO *const io = GvIO(gv);
1197 PERL_ARGS_ASSERT_DO_TELL;
1199 if (io && (fp = IoIFP(io))) {
1200 return PerlIO_tell(fp);
1203 SETERRNO(EBADF,RMS_IFI);
1208 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1210 IO *const io = GvIO(gv);
1213 if (io && (fp = IoIFP(io))) {
1214 return PerlIO_seek(fp, pos, whence) >= 0;
1217 SETERRNO(EBADF,RMS_IFI);
1222 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1224 IO *const io = GvIO(gv);
1227 PERL_ARGS_ASSERT_DO_SYSSEEK;
1229 if (io && (fp = IoIFP(io))) {
1230 int fd = PerlIO_fileno(fp);
1231 if (fd < 0 || (whence == SEEK_SET && pos < 0)) {
1232 SETERRNO(EINVAL,LIB_INVARG);
1235 return PerlLIO_lseek(fd, pos, whence);
1239 SETERRNO(EBADF,RMS_IFI);
1244 Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
1246 int mode = O_BINARY;
1247 PERL_UNUSED_CONTEXT;
1253 if (s[2] == 'a' && s[3] == 'w'
1254 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1263 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1264 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1273 goto fail_discipline;
1276 else if (isSPACE(*s)) {
1283 end = strchr(s+1, ':');
1286 #ifndef PERLIO_LAYERS
1287 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1298 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1300 my_chsize(int fd, Off_t length)
1303 /* code courtesy of William Kucharski */
1308 if (PerlLIO_fstat(fd, &filebuf) < 0)
1311 if (filebuf.st_size < length) {
1313 /* extend file length */
1315 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1318 /* write a "0" byte */
1320 if ((PerlLIO_write(fd, "", 1)) != 1)
1324 /* truncate length */
1328 fl.l_start = length;
1329 fl.l_type = F_WRLCK; /* write lock on file space */
1332 * This relies on the UNDOCUMENTED F_FREESP argument to
1333 * fcntl(2), which truncates the file so that it ends at the
1334 * position indicated by fl.l_start.
1336 * Will minor miracles never cease?
1339 if (fcntl(fd, F_FREESP, &fl) < 0)
1345 Perl_croak_nocontext("truncate not implemented");
1346 #endif /* F_FREESP */
1349 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1352 Perl_do_print(pTHX_ SV *sv, PerlIO *fp)
1354 PERL_ARGS_ASSERT_DO_PRINT;
1356 /* assuming fp is checked earlier */
1359 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
1360 assert(!SvGMAGICAL(sv));
1362 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1364 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1365 return !PerlIO_error(fp);
1369 /* Do this first to trigger any overloading. */
1370 const char *tmps = SvPV_const(sv, len);
1374 if (PerlIO_isutf8(fp)) { /* If the stream is utf8 ... */
1375 if (!SvUTF8(sv)) { /* Convert to utf8 if necessary */
1376 /* We don't modify the original scalar. */
1377 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1378 tmps = (char *) tmpbuf;
1380 else if (ckWARN4_d(WARN_UTF8, WARN_SURROGATE, WARN_NON_UNICODE, WARN_NONCHAR)) {
1381 (void) check_utf8_print((const U8*) tmps, len);
1383 } /* else stream isn't utf8 */
1384 else if (DO_UTF8(sv)) { /* But if is utf8 internally, attempt to
1386 STRLEN tmplen = len;
1388 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
1391 /* Here, succeeded in downgrading from utf8. Set up to below
1392 * output the converted value */
1394 tmps = (char *) tmpbuf;
1397 else { /* Non-utf8 output stream, but string only representable in
1399 assert((char *)result == tmps);
1400 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
1401 "Wide character in %s",
1402 PL_op ? OP_DESC(PL_op) : "print"
1404 /* Could also check that isn't one of the things to avoid
1405 * in utf8 by using check_utf8_print(), but not doing so,
1406 * since the stream isn't a UTF8 stream */
1409 /* To detect whether the process is about to overstep its
1410 * filesize limit we would need getrlimit(). We could then
1411 * also transparently raise the limit with setrlimit() --
1412 * but only until the system hard limit/the filesystem limit,
1413 * at which we would get EPERM. Note that when using buffered
1414 * io the write failure can be delayed until the flush/close. --jhi */
1415 if (len && (PerlIO_write(fp,tmps,len) == 0))
1418 return happy ? !PerlIO_error(fp) : FALSE;
1423 Perl_my_stat_flags(pTHX_ const U32 flags)
1429 if (PL_op->op_flags & OPf_REF) {
1433 return PL_laststatval;
1436 PL_laststype = OP_STAT;
1437 PL_statgv = gv ? gv : (GV *)io;
1438 sv_setpvs(PL_statname, "");
1441 int fd = PerlIO_fileno(IoIFP(io));
1443 /* E.g. PerlIO::scalar has no real fd. */
1444 return (PL_laststatval = -1);
1446 return (PL_laststatval = PerlLIO_fstat(fd, &PL_statcache));
1448 } else if (IoDIRP(io)) {
1449 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
1452 PL_laststatval = -1;
1456 else if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1458 return PL_laststatval;
1460 SV* const sv = TOPs;
1463 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
1466 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
1467 io = MUTABLE_IO(SvRV(sv));
1469 goto do_fstat_have_io;
1472 s = SvPV_flags_const(sv, len, flags);
1474 sv_setpvn(PL_statname, s, len);
1475 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1476 PL_laststype = OP_STAT;
1477 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1478 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(s)) {
1479 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
1480 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1483 return PL_laststatval;
1489 Perl_my_lstat_flags(pTHX_ const U32 flags)
1491 static const char* const no_prev_lstat = "The stat preceding -l _ wasn't an lstat";
1494 SV* const sv = TOPs;
1496 if (PL_op->op_flags & OPf_REF) {
1497 if (cGVOP_gv == PL_defgv) {
1498 if (PL_laststype != OP_LSTAT)
1499 Perl_croak(aTHX_ "%s", no_prev_lstat);
1500 return PL_laststatval;
1502 PL_laststatval = -1;
1503 if (ckWARN(WARN_IO)) {
1504 /* diag_listed_as: Use of -l on filehandle%s */
1505 Perl_warner(aTHX_ packWARN(WARN_IO),
1506 "Use of -l on filehandle %"HEKf,
1507 HEKfARG(GvENAME_HEK(cGVOP_gv)));
1511 if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1513 if (PL_laststype != OP_LSTAT)
1514 Perl_croak(aTHX_ "%s", no_prev_lstat);
1515 return PL_laststatval;
1518 PL_laststype = OP_LSTAT;
1520 if ( ( (SvROK(sv) && ( isGV_with_GP(SvRV(sv))
1521 || (isio = SvTYPE(SvRV(sv)) == SVt_PVIO) )
1525 && ckWARN(WARN_IO)) {
1527 /* diag_listed_as: Use of -l on filehandle%s */
1528 Perl_warner(aTHX_ packWARN(WARN_IO),
1529 "Use of -l on filehandle");
1531 /* diag_listed_as: Use of -l on filehandle%s */
1532 Perl_warner(aTHX_ packWARN(WARN_IO),
1533 "Use of -l on filehandle %"HEKf,
1534 HEKfARG(GvENAME_HEK((const GV *)
1535 (SvROK(sv) ? SvRV(sv) : sv))));
1537 file = SvPV_flags_const_nolen(sv, flags);
1538 sv_setpv(PL_statname,file);
1539 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
1540 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(file)) {
1541 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
1542 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1545 return PL_laststatval;
1549 S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1551 const int e = errno;
1552 PERL_ARGS_ASSERT_EXEC_FAILED;
1554 if (ckWARN(WARN_EXEC))
1555 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1558 /* XXX silently ignore failures */
1559 PERL_UNUSED_RESULT(PerlLIO_write(fd, (void*)&e, sizeof(int)));
1565 Perl_do_aexec5(pTHX_ SV *really, SV **mark, SV **sp,
1566 int fd, int do_report)
1569 PERL_ARGS_ASSERT_DO_AEXEC5;
1570 #if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
1571 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1575 const char *tmps = NULL;
1576 Newx(PL_Argv, sp - mark + 1, const char*);
1579 while (++mark <= sp) {
1581 *a++ = SvPV_nolen_const(*mark);
1587 tmps = SvPV_nolen_const(really);
1588 if ((!really && *PL_Argv[0] != '/') ||
1589 (really && *tmps != '/')) /* will execvp use PATH? */
1590 TAINT_ENV(); /* testing IFS here is overkill, probably */
1592 if (really && *tmps) {
1593 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1595 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1598 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
1606 Perl_do_execfree(pTHX)
1614 #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
1617 Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
1624 /* Make a copy so we can change it */
1625 const Size_t cmdlen = strlen(incmd) + 1;
1627 PERL_ARGS_ASSERT_DO_EXEC3;
1629 Newx(buf, cmdlen, char);
1631 memcpy(cmd, incmd, cmdlen);
1633 while (*cmd && isSPACE(*cmd))
1636 /* save an extra exec if possible */
1640 char flags[PERL_FLAGS_MAX];
1641 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1642 strnEQ(cmd+PL_cshlen," -c",3)) {
1643 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
1644 s = cmd+PL_cshlen+3;
1647 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
1652 char * const ncmd = s;
1658 if (s[-1] == '\'') {
1661 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
1664 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
1673 /* see if there are shell metacharacters in it */
1675 if (*cmd == '.' && isSPACE(cmd[1]))
1678 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1682 while (isWORDCHAR(*s))
1683 s++; /* catch VAR=val gizmo */
1687 for (s = cmd; *s; s++) {
1688 if (*s != ' ' && !isALPHA(*s) &&
1689 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1690 if (*s == '\n' && !s[1]) {
1694 /* handle the 2>&1 construct at the end */
1695 if (*s == '>' && s[1] == '&' && s[2] == '1'
1696 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1697 && (!s[3] || isSPACE(s[3])))
1699 const char *t = s + 3;
1701 while (*t && isSPACE(*t))
1703 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1710 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
1712 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
1718 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*);
1719 PL_Cmd = savepvn(cmd, s-cmd);
1721 for (s = PL_Cmd; *s;) {
1726 while (*s && !isSPACE(*s))
1734 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1736 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1740 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
1747 #endif /* OS2 || WIN32 */
1750 Perl_apply(pTHX_ I32 type, SV **mark, SV **sp)
1754 const char *const what = PL_op_name[type];
1757 SV ** const oldmark = mark;
1758 bool killgp = FALSE;
1760 PERL_ARGS_ASSERT_APPLY;
1762 PERL_UNUSED_VAR(what); /* may not be used depending on compile options */
1764 /* Doing this ahead of the switch statement preserves the old behaviour,
1765 where attempting to use kill as a taint test test would fail on
1766 platforms where kill was not defined. */
1768 if (type == OP_KILL)
1769 Perl_die(aTHX_ PL_no_func, what);
1772 if (type == OP_CHOWN)
1773 Perl_die(aTHX_ PL_no_func, what);
1777 #define APPLY_TAINT_PROPER() \
1779 if (TAINT_get) { TAINT_PROPER(what); } \
1782 /* This is a first heuristic; it doesn't catch tainting magic. */
1784 while (++mark <= sp) {
1785 if (SvTAINTED(*mark)) {
1794 APPLY_TAINT_PROPER();
1797 APPLY_TAINT_PROPER();
1799 while (++mark <= sp) {
1801 if ((gv = MAYBE_DEREF_GV(*mark))) {
1802 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1804 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
1805 APPLY_TAINT_PROPER();
1807 SETERRNO(EBADF,RMS_IFI);
1809 } else if (fchmod(fd, val))
1812 Perl_die(aTHX_ PL_no_func, "fchmod");
1816 SETERRNO(EBADF,RMS_IFI);
1821 const char *name = SvPV_nomg_const(*mark, len);
1822 APPLY_TAINT_PROPER();
1823 if (!IS_SAFE_PATHNAME(name, len, "chmod") ||
1824 PerlLIO_chmod(name, val)) {
1833 APPLY_TAINT_PROPER();
1834 if (sp - mark > 2) {
1836 val = SvIVx(*++mark);
1837 val2 = SvIVx(*++mark);
1838 APPLY_TAINT_PROPER();
1840 while (++mark <= sp) {
1842 if ((gv = MAYBE_DEREF_GV(*mark))) {
1843 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1845 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
1846 APPLY_TAINT_PROPER();
1848 SETERRNO(EBADF,RMS_IFI);
1851 } else if (val < 0) {
1852 SETERRNO(EINVAL,LIB_INVARG);
1856 } else if (val2 < 0) {
1857 SETERRNO(EINVAL,LIB_INVARG);
1860 } else if (fchown(fd, val, val2))
1863 Perl_die(aTHX_ PL_no_func, "fchown");
1867 SETERRNO(EBADF,RMS_IFI);
1872 const char *name = SvPV_nomg_const(*mark, len);
1873 APPLY_TAINT_PROPER();
1874 if (!IS_SAFE_PATHNAME(name, len, "chown") ||
1875 PerlLIO_chown(name, val, val2)) {
1884 XXX Should we make lchown() directly available from perl?
1885 For now, we'll let Configure test for HAS_LCHOWN, but do
1886 nothing in the core.
1891 APPLY_TAINT_PROPER();
1894 s = SvPVx_const(*++mark, len);
1895 if (*s == '-' && isALPHA(s[1]))
1902 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
1906 if ((val = whichsig_pvn(s, len)) < 0)
1907 Perl_croak(aTHX_ "Unrecognized signal name \"%"SVf"\"", SVfARG(*mark));
1918 APPLY_TAINT_PROPER();
1921 while (++mark <= sp) {
1924 if (!(SvNIOK(*mark) || looks_like_number(*mark)))
1925 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1926 proc = SvIV_nomg(*mark);
1927 APPLY_TAINT_PROPER();
1929 /* use killpg in preference, as the killpg() wrapper for Win32
1930 * understands process groups, but the kill() wrapper doesn't */
1931 if (killgp ? PerlProc_killpg(proc, val)
1932 : PerlProc_kill(proc, val))
1934 if (PerlProc_kill(killgp ? -proc: proc, val))
1942 APPLY_TAINT_PROPER();
1944 while (++mark <= sp) {
1945 s = SvPV_const(*mark, len);
1946 APPLY_TAINT_PROPER();
1947 if (!IS_SAFE_PATHNAME(s, len, "unlink")) {
1950 else if (PL_unsafe) {
1955 #if defined(__amigaos4__) && defined(NEWLIB)
1958 /* Under AmigaOS4 unlink only 'fails' if the
1959 * filename is invalid. It may not remove the file
1960 * if it's locked, so check if it's still around. */
1961 if ((access(s,F_OK) != -1))
1968 else { /* don't let root wipe out directories without -U */
1970 if (PerlLIO_lstat(s, &statbuf) < 0)
1972 else if (S_ISDIR(statbuf.st_mode)) {
1973 SETERRNO(EISDIR, SS_NOPRIV);
1981 #if defined(__amigaos4__) && defined(NEWLIB)
1984 /* Under AmigaOS4 unlink only 'fails' if the filename is invalid */
1985 /* It may not remove the file if it's Locked, so check if it's still */
1987 if((access(s,F_OK) != -1))
1997 #if defined(HAS_UTIME) || defined(HAS_FUTIMES)
1999 APPLY_TAINT_PROPER();
2000 if (sp - mark > 2) {
2001 #if defined(HAS_FUTIMES)
2002 struct timeval utbuf[2];
2003 void *utbufp = utbuf;
2004 #elif defined(I_UTIME) || defined(VMS)
2005 struct utimbuf utbuf;
2006 struct utimbuf *utbufp = &utbuf;
2012 void *utbufp = &utbuf;
2015 SV* const accessed = *++mark;
2016 SV* const modified = *++mark;
2018 /* Be like C, and if both times are undefined, let the C
2019 * library figure out what to do. This usually means
2020 * "current time". */
2022 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
2025 Zero(&utbuf, sizeof utbuf, char);
2027 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
2028 utbuf[0].tv_usec = 0;
2029 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
2030 utbuf[1].tv_usec = 0;
2031 #elif defined(BIG_TIME)
2032 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
2033 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
2035 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
2036 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
2039 APPLY_TAINT_PROPER();
2041 while (++mark <= sp) {
2043 if ((gv = MAYBE_DEREF_GV(*mark))) {
2044 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
2046 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
2047 APPLY_TAINT_PROPER();
2049 SETERRNO(EBADF,RMS_IFI);
2051 } else if (futimes(fd, (struct timeval *) utbufp))
2054 Perl_die(aTHX_ PL_no_func, "futimes");
2062 const char * const name = SvPV_nomg_const(*mark, len);
2063 APPLY_TAINT_PROPER();
2064 if (!IS_SAFE_PATHNAME(name, len, "utime")) {
2069 if (utimes(name, (struct timeval *)utbufp))
2071 if (PerlLIO_utime(name, utbufp))
2085 #undef APPLY_TAINT_PROPER
2088 /* Do the permissions allow some operation? Assumes statcache already set. */
2089 #ifndef VMS /* VMS' cando is in vms.c */
2091 Perl_cando(pTHX_ Mode_t mode, bool effective, const Stat_t *statbufp)
2092 /* effective is a flag, true for EUID, or for checking if the effective gid
2093 * is in the list of groups returned from getgroups().
2096 PERL_ARGS_ASSERT_CANDO;
2097 PERL_UNUSED_CONTEXT;
2100 /* [Comments and code from Len Reed]
2101 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
2102 * to write-protected files. The execute permission bit is set
2103 * by the Microsoft C library stat() function for the following:
2108 * All files and directories are readable.
2109 * Directories and special files, e.g. "CON", cannot be
2111 * [Comment by Tom Dinger -- a directory can have the write-protect
2112 * bit set in the file system, but DOS permits changes to
2113 * the directory anyway. In addition, all bets are off
2114 * here for networked software, such as Novell and
2118 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
2119 * too so it will actually look into the files for magic numbers
2121 return (mode & statbufp->st_mode) ? TRUE : FALSE;
2123 #else /* ! DOSISH */
2125 if (ingroup(544,effective)) { /* member of Administrators */
2127 if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 0) { /* root is special */
2129 if (mode == S_IXUSR) {
2130 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
2134 return TRUE; /* root reads and writes anything */
2137 if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) {
2138 if (statbufp->st_mode & mode)
2139 return TRUE; /* ok as "user" */
2141 else if (ingroup(statbufp->st_gid,effective)) {
2142 if (statbufp->st_mode & mode >> 3)
2143 return TRUE; /* ok as "group" */
2145 else if (statbufp->st_mode & mode >> 6)
2146 return TRUE; /* ok as "other" */
2148 #endif /* ! DOSISH */
2153 S_ingroup(pTHX_ Gid_t testgid, bool effective)
2155 #ifndef PERL_IMPLICIT_SYS
2156 /* PERL_IMPLICIT_SYS like Win32: getegid() etc. require the context. */
2157 PERL_UNUSED_CONTEXT;
2159 if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid()))
2161 #ifdef HAS_GETGROUPS
2163 Groups_t *gary = NULL;
2167 anum = getgroups(0, gary);
2169 Newx(gary, anum, Groups_t);
2170 anum = getgroups(anum, gary);
2172 if (gary[anum] == testgid) {
2186 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
2189 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
2191 const key_t key = (key_t)SvNVx(*++mark);
2192 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
2193 const I32 flags = SvIVx(*++mark);
2195 PERL_ARGS_ASSERT_DO_IPCGET;
2196 PERL_UNUSED_ARG(sp);
2203 return msgget(key, flags);
2207 return semget(key, (int) SvIV(nsv), flags);
2211 return shmget(key, (size_t) SvUV(nsv), flags);
2213 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2215 /* diag_listed_as: msg%s not implemented */
2216 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2219 return -1; /* should never happen */
2223 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
2227 const I32 id = SvIVx(*++mark);
2229 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
2231 const I32 cmd = SvIVx(*++mark);
2232 SV * const astr = *++mark;
2233 STRLEN infosize = 0;
2234 I32 getinfo = (cmd == IPC_STAT);
2236 PERL_ARGS_ASSERT_DO_IPCCTL;
2237 PERL_UNUSED_ARG(sp);
2243 if (cmd == IPC_STAT || cmd == IPC_SET)
2244 infosize = sizeof(struct msqid_ds);
2249 if (cmd == IPC_STAT || cmd == IPC_SET)
2250 infosize = sizeof(struct shmid_ds);
2256 if (cmd == IPC_STAT || cmd == IPC_SET)
2257 infosize = sizeof(struct semid_ds);
2258 else if (cmd == GETALL || cmd == SETALL)
2260 struct semid_ds semds;
2262 #ifdef EXTRA_F_IN_SEMUN_BUF
2263 semun.buff = &semds;
2267 getinfo = (cmd == GETALL);
2268 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2270 infosize = semds.sem_nsems * sizeof(short);
2271 /* "short" is technically wrong but much more portable
2272 than guessing about u_?short(_t)? */
2275 /* diag_listed_as: sem%s not implemented */
2276 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2280 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2282 /* diag_listed_as: shm%s not implemented */
2283 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2291 SvPV_force_nolen(astr);
2292 a = SvGROW(astr, infosize+1);
2297 a = SvPV(astr, len);
2298 if (len != infosize)
2299 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2307 const IV i = SvIV(astr);
2308 a = INT2PTR(char *,i); /* ouch */
2315 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2321 union semun unsemds;
2324 unsemds.val = PTR2nat(a);
2327 #ifdef EXTRA_F_IN_SEMUN_BUF
2328 unsemds.buff = (struct semid_ds *)a;
2330 unsemds.buf = (struct semid_ds *)a;
2333 ret = Semctl(id, n, cmd, unsemds);
2335 /* diag_listed_as: sem%s not implemented */
2336 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2343 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2347 if (getinfo && ret >= 0) {
2348 SvCUR_set(astr, infosize);
2349 *SvEND(astr) = '\0';
2356 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2360 const I32 id = SvIVx(*++mark);
2361 SV * const mstr = *++mark;
2362 const I32 flags = SvIVx(*++mark);
2363 const char * const mbuf = SvPV_const(mstr, len);
2364 const I32 msize = len - sizeof(long);
2366 PERL_ARGS_ASSERT_DO_MSGSND;
2367 PERL_UNUSED_ARG(sp);
2370 Perl_croak(aTHX_ "Arg too short for msgsnd");
2372 if (id >= 0 && flags >= 0) {
2373 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2375 SETERRNO(EINVAL,LIB_INVARG);
2379 PERL_UNUSED_ARG(sp);
2380 PERL_UNUSED_ARG(mark);
2381 /* diag_listed_as: msg%s not implemented */
2382 Perl_croak(aTHX_ "msgsnd not implemented");
2388 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2393 I32 msize, flags, ret;
2394 const I32 id = SvIVx(*++mark);
2395 SV * const mstr = *++mark;
2397 PERL_ARGS_ASSERT_DO_MSGRCV;
2398 PERL_UNUSED_ARG(sp);
2400 /* suppress warning when reading into undef var --jhi */
2402 sv_setpvs(mstr, "");
2403 msize = SvIVx(*++mark);
2404 mtype = (long)SvIVx(*++mark);
2405 flags = SvIVx(*++mark);
2406 SvPV_force_nolen(mstr);
2407 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2410 if (id >= 0 && msize >= 0 && flags >= 0) {
2411 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2413 SETERRNO(EINVAL,LIB_INVARG);
2417 SvCUR_set(mstr, sizeof(long)+ret);
2418 *SvEND(mstr) = '\0';
2419 /* who knows who has been playing with this message? */
2424 PERL_UNUSED_ARG(sp);
2425 PERL_UNUSED_ARG(mark);
2426 /* diag_listed_as: msg%s not implemented */
2427 Perl_croak(aTHX_ "msgrcv not implemented");
2433 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2437 const I32 id = SvIVx(*++mark);
2438 SV * const opstr = *++mark;
2439 const char * const opbuf = SvPV_const(opstr, opsize);
2441 PERL_ARGS_ASSERT_DO_SEMOP;
2442 PERL_UNUSED_ARG(sp);
2444 if (opsize < 3 * SHORTSIZE
2445 || (opsize % (3 * SHORTSIZE))) {
2446 SETERRNO(EINVAL,LIB_INVARG);
2450 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2452 const int nsops = opsize / (3 * sizeof (short));
2454 short * const ops = (short *) opbuf;
2456 struct sembuf *temps, *t;
2459 Newx (temps, nsops, struct sembuf);
2467 result = semop(id, temps, nsops);
2472 /* diag_listed_as: sem%s not implemented */
2473 Perl_croak(aTHX_ "semop not implemented");
2478 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2482 struct shmid_ds shmds;
2483 const I32 id = SvIVx(*++mark);
2484 SV * const mstr = *++mark;
2485 const I32 mpos = SvIVx(*++mark);
2486 const I32 msize = SvIVx(*++mark);
2488 PERL_ARGS_ASSERT_DO_SHMIO;
2489 PERL_UNUSED_ARG(sp);
2492 if (shmctl(id, IPC_STAT, &shmds) == -1)
2494 if (mpos < 0 || msize < 0
2495 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
2496 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2500 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2502 SETERRNO(EINVAL,LIB_INVARG);
2505 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2507 if (optype == OP_SHMREAD) {
2509 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2511 SvUPGRADE(mstr, SVt_PV);
2513 sv_setpvs(mstr, "");
2515 mbuf = SvGROW(mstr, (STRLEN)msize+1);
2517 Copy(shm + mpos, mbuf, msize, char);
2518 SvCUR_set(mstr, msize);
2519 *SvEND(mstr) = '\0';
2521 /* who knows who has been playing with this shared memory? */
2527 const char *mbuf = SvPV_const(mstr, len);
2528 const I32 n = ((I32)len > msize) ? msize : (I32)len;
2529 Copy(mbuf, shm + mpos, n, char);
2531 memzero(shm + mpos + n, msize - n);
2535 /* diag_listed_as: shm%s not implemented */
2536 Perl_croak(aTHX_ "shm I/O not implemented");
2541 #endif /* SYSV IPC */
2546 =for apidoc start_glob
2548 Function called by C<do_readline> to spawn a glob (or do the glob inside
2549 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2550 this glob starter is only used by miniperl during the build process,
2551 or when PERL_EXTERNAL_GLOB is defined.
2552 Moving it away shrinks F<pp_hot.c>; shrinking F<pp_hot.c> helps speed perl up.
2558 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2560 SV * const tmpcmd = newSV(0);
2563 const char *s = SvPV(tmpglob, len);
2565 PERL_ARGS_ASSERT_START_GLOB;
2567 if (!IS_SAFE_SYSCALL(s, len, "pattern", "glob"))
2572 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2573 /* since spawning off a process is a real performance hit */
2580 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
2585 sv_setpv(tmpcmd, "for a in ");
2586 sv_catsv(tmpcmd, tmpglob);
2587 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2590 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2591 sv_catsv(tmpcmd, tmpglob);
2593 sv_setpv(tmpcmd, "perlglob ");
2594 sv_catsv(tmpcmd, tmpglob);
2595 sv_catpv(tmpcmd, " |");
2600 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2601 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2602 sv_catsv(tmpcmd, tmpglob);
2603 sv_catpv(tmpcmd, "' 2>/dev/null |");
2605 sv_setpv(tmpcmd, "echo ");
2606 sv_catsv(tmpcmd, tmpglob);
2607 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2609 #endif /* !DOSISH */
2611 GV * const envgv = gv_fetchpvs("ENV", 0, SVt_PVHV);
2612 SV ** const home = hv_fetchs(GvHV(envgv), "HOME", 0);
2613 SV ** const path = hv_fetchs(GvHV(envgv), "PATH", 0);
2614 if (home && *home) SvGETMAGIC(*home);
2615 if (path && *path) SvGETMAGIC(*path);
2616 save_hash(gv_fetchpvs("ENV", 0, SVt_PVHV));
2617 if (home && *home) SvSETMAGIC(*home);
2618 if (path && *path) SvSETMAGIC(*path);
2620 (void)do_open6(PL_last_in_gv, SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2626 if (!fp && ckWARN(WARN_GLOB)) {
2627 Perl_warner(aTHX_ packWARN(WARN_GLOB), "glob failed (can't start child: %s)",
2635 * ex: set ts=8 sts=4 sw=4 et: