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)
68 IO * const io = GvIOn(gv);
70 PERL_ARGS_ASSERT_OPENN_SETUP;
75 *savetype = IoTYPE_CLOSED;
77 Zero(mode,sizeof(mode),char);
78 PL_forkprocess = 1; /* assume true if no fork */
80 /* If currently open - close before we re-open */
82 if (IoTYPE(io) == IoTYPE_STD) {
83 /* This is a clone of one of STD* handles */
86 const int old_fd = PerlIO_fileno(IoIFP(io));
88 if (old_fd >= 0 && old_fd <= PL_maxsysfd) {
89 /* This is one of the original STD* handles */
92 *savetype = IoTYPE(io);
98 if (IoTYPE(io) == IoTYPE_PIPE)
99 result = PerlProc_pclose(IoIFP(io));
100 else if (IoIFP(io) != IoOFP(io)) {
102 result = PerlIO_close(IoOFP(io));
103 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
106 result = PerlIO_close(IoIFP(io));
109 result = PerlIO_close(IoIFP(io));
111 if (result == EOF && old_fd > PL_maxsysfd) {
112 /* Why is this not Perl_warn*() call ? */
113 PerlIO_printf(Perl_error_log,
114 "Warning: unable to close filehandle %"HEKf" properly.\n",
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)
153 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
154 IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype);
158 PERL_ARGS_ASSERT_DO_OPEN_RAW;
160 /* For ease of blame back to 5.000, keep the existing indenting. */
162 /* sysopen style args, i.e. integer mode and permissions */
164 const int appendtrunc =
166 #ifdef O_APPEND /* Not fully portable. */
169 #ifdef O_TRUNC /* Not fully portable. */
173 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
183 It might be (in OS/390 and Mac OS Classic it is)
189 This means that simple & with O_RDWR would look
190 like O_RDONLY is present. Therefore we have to
193 if ((ismodifying = (rawmode & modifyingmode))) {
194 if ((ismodifying & O_WRONLY) == O_WRONLY ||
195 (ismodifying & O_RDWR) == O_RDWR ||
196 (ismodifying & (O_CREAT|appendtrunc)))
197 TAINT_PROPER("sysopen");
199 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
201 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
202 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
205 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
207 namesv = newSVpvn_flags(oname, len, SVs_TEMP);
208 fp = PerlIO_openn(aTHX_ NULL, mode, -1, rawmode, rawperm, NULL, 1, &namesv);
210 return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd,
211 savetype, writing, 0, NULL);
215 Perl_do_open6(pTHX_ GV *gv, const char *oname, STRLEN len,
216 PerlIO *supplied_fp, SV **svp, U32 num_svs)
223 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
224 IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype);
227 bool was_fdopen = FALSE;
230 PERL_ARGS_ASSERT_DO_OPEN6;
232 /* For ease of blame back to 5.000, keep the existing indenting. */
234 /* Regular (non-sys) open */
239 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
241 /* Collect default raw/crlf info from the op */
242 if (PL_op && PL_op->op_type == OP_OPEN) {
243 /* set up IO layers */
244 const U8 flags = PL_op->op_private;
245 in_raw = (flags & OPpOPEN_IN_RAW);
246 in_crlf = (flags & OPpOPEN_IN_CRLF);
247 out_raw = (flags & OPpOPEN_OUT_RAW);
248 out_crlf = (flags & OPpOPEN_OUT_CRLF);
251 type = savepvn(oname, len);
255 /* Lose leading and trailing white space */
256 while (isSPACE(*type))
258 while (tend > type && isSPACE(tend[-1]))
264 /* New style explicit name, type is just mode and layer info */
266 if (SvROK(*svp) && !strchr(oname,'&')) {
268 Perl_warner(aTHX_ packWARN(WARN_IO),
269 "Can't open a reference");
270 SETERRNO(EINVAL, LIB_INVARG);
274 #endif /* USE_STDIO */
275 p = (SvOK(*svp) || SvGMAGICAL(*svp)) ? SvPV(*svp, nlen) : NULL;
277 if (p && !IS_SAFE_PATHNAME(p, nlen, "open")) {
282 name = p ? savepvn(p, nlen) : savepvs("");
291 if ((*type == IoTYPE_RDWR) && /* scary */
292 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
293 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
294 TAINT_PROPER("open");
299 if (*type == IoTYPE_PIPE) {
301 if (type[1] != IoTYPE_STD) {
303 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
309 } while (isSPACE(*type));
315 /* command is missing 19990114 */
316 if (ckWARN(WARN_PIPE))
317 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
322 if (!(*name == '-' && name[1] == '\0') || num_svs)
324 TAINT_PROPER("piped open");
325 if (!num_svs && name[len-1] == '|') {
327 if (ckWARN(WARN_PIPE))
328 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
337 fp = PerlProc_popen_list(mode, num_svs, svp);
340 fp = PerlProc_popen(name,mode);
344 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
351 else if (*type == IoTYPE_WRONLY) {
352 TAINT_PROPER("open");
354 if (*type == IoTYPE_WRONLY) {
355 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
356 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
370 dodup = PERLIO_DUP_FD;
376 if (!num_svs && !*type && supplied_fp) {
377 /* "<+&" etc. is used by typemaps */
381 PerlIO *that_fp = NULL;
384 /* diag_listed_as: More than one argument to '%s' open */
385 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
387 while (isSPACE(*type))
391 || (SvPOKp(*svp) && looks_like_number(*svp))
393 wanted_fd = SvUV(*svp);
396 else if (isDIGIT(*type)) {
397 wanted_fd = atoi(type);
402 thatio = sv_2io(*svp);
405 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
407 thatio = GvIO(thatgv);
411 SETERRNO(EINVAL,SS_IVCHAN);
416 if ((that_fp = IoIFP(thatio))) {
417 /* Flush stdio buffer before dup. --mjd
418 * Unfortunately SEEK_CURing 0 seems to
419 * be optimized away on most platforms;
420 * only Solaris and Linux seem to flush
422 /* On the other hand, do all platforms
423 * take gracefully to flushing a read-only
424 * filehandle? Perhaps we should do
425 * fsetpos(src)+fgetpos(dst)? --nik */
426 PerlIO_flush(that_fp);
427 wanted_fd = PerlIO_fileno(that_fp);
428 /* When dup()ing STDIN, STDOUT or STDERR
429 * explicitly set appropriate access mode */
430 if (that_fp == PerlIO_stdout()
431 || that_fp == PerlIO_stderr())
432 IoTYPE(io) = IoTYPE_WRONLY;
433 else if (that_fp == PerlIO_stdin())
434 IoTYPE(io) = IoTYPE_RDONLY;
435 /* When dup()ing a socket, say result is
437 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
438 IoTYPE(io) = IoTYPE_SOCKET;
446 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
450 wanted_fd = PerlLIO_dup(wanted_fd);
453 if (!(fp = PerlIO_openn(aTHX_ type,mode,wanted_fd,0,0,NULL,num_svs,svp))) {
454 if (dodup && wanted_fd >= 0)
455 PerlLIO_close(wanted_fd);
461 while (isSPACE(*type))
463 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
465 fp = PerlIO_stdout();
466 IoTYPE(io) = IoTYPE_STD;
468 /* diag_listed_as: More than one argument to '%s' open */
469 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
474 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
477 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
479 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
483 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
484 goto unknown_open_mode;
485 } /* IoTYPE_WRONLY */
486 else if (*type == IoTYPE_RDONLY) {
489 } while (isSPACE(*type));
498 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
501 IoTYPE(io) = IoTYPE_STD;
503 /* diag_listed_as: More than one argument to '%s' open */
504 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
509 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
512 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
514 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
517 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
518 goto unknown_open_mode;
519 } /* IoTYPE_RDONLY */
520 else if ((num_svs && /* '-|...' or '...|' */
521 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
522 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
524 type += 2; /* skip over '-|' */
528 while (tend > type && isSPACE(tend[-1]))
530 for (; isSPACE(*type); type++)
536 /* command is missing 19990114 */
537 if (ckWARN(WARN_PIPE))
538 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
543 if (!(*name == '-' && name[1] == '\0') || num_svs)
545 TAINT_PROPER("piped open");
554 fp = PerlProc_popen_list(mode,num_svs,svp);
557 fp = PerlProc_popen(name,mode);
559 IoTYPE(io) = IoTYPE_PIPE;
561 while (isSPACE(*type))
564 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
571 else { /* layer(Args) */
573 goto unknown_open_mode;
575 IoTYPE(io) = IoTYPE_RDONLY;
576 for (; isSPACE(*name); name++)
585 if (*name == '-' && name[1] == '\0') {
587 IoTYPE(io) = IoTYPE_STD;
591 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
594 SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
596 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
603 return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd,
604 savetype, writing, was_fdopen, type);
607 /* Yes, this is ugly, but it's private, and I don't see a cleaner way to
608 simplify the two-headed public interface of do_openn. */
610 S_openn_cleanup(pTHX_ GV *gv, IO *io, PerlIO *fp, char *mode, const char *oname,
611 PerlIO *saveifp, PerlIO *saveofp, int savefd, char savetype,
612 int writing, bool was_fdopen, const char *type)
616 PERL_ARGS_ASSERT_OPENN_CLEANUP;
619 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
620 && should_warn_nl(oname)
624 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
625 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
631 if (ckWARN(WARN_IO)) {
632 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
633 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
634 Perl_warner(aTHX_ packWARN(WARN_IO),
635 "Filehandle STD%s reopened as %"HEKf
637 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
638 HEKfARG(GvENAME_HEK(gv)));
640 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
641 Perl_warner(aTHX_ packWARN(WARN_IO),
642 "Filehandle STDIN reopened as %"HEKf" only for output",
643 HEKfARG(GvENAME_HEK(gv))
648 fd = PerlIO_fileno(fp);
649 /* Do NOT do: "if (fd < 0) goto say_false;" here. If there is no
650 * fd assume it isn't a socket - this covers PerlIO::scalar -
651 * otherwise unless we "know" the type probe for socket-ness.
653 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
654 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
655 /* If PerlIO claims to have fd we had better be able to fstat() it. */
656 (void) PerlIO_close(fp);
660 if (S_ISSOCK(PL_statbuf.st_mode))
661 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
664 !(PL_statbuf.st_mode & S_IFMT)
665 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
666 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
667 ) { /* on OS's that return 0 on fstat()ed pipe */
669 Sock_size_t buflen = sizeof tmpbuf;
670 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
671 || errno != ENOTSOCK)
672 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
673 /* but some return 0 for streams too, sigh */
675 #endif /* HAS_SOCKET */
676 #endif /* !PERL_MICRO */
680 * If this is a standard handle we discard all the layer stuff
681 * and just dup the fd into whatever was on the handle before !
684 if (saveifp) { /* must use old fp? */
685 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
686 then dup the new fileno down
689 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
690 if (saveofp != saveifp) { /* was a socket? */
691 PerlIO_close(saveofp);
695 /* Still a small can-of-worms here if (say) PerlIO::scalar
696 is assigned to (say) STDOUT - for now let dup2() fail
697 and provide the error
700 SETERRNO(EBADF,RMS_IFI);
702 } else if (PerlLIO_dup2(fd, savefd) < 0) {
703 (void)PerlIO_close(fp);
707 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
708 char newname[FILENAME_MAX+1];
709 if (PerlIO_getname(fp, newname)) {
710 if (fd == PerlIO_fileno(PerlIO_stdout()))
711 vmssetuserlnm("SYS$OUTPUT", newname);
712 if (fd == PerlIO_fileno(PerlIO_stderr()))
713 vmssetuserlnm("SYS$ERROR", newname);
719 /* PL_fdpid isn't used on Windows, so avoid this useless work.
720 * XXX Probably the same for a lot of other places. */
725 sv = *av_fetch(PL_fdpid,fd,TRUE);
726 SvUPGRADE(sv, SVt_IV);
729 sv = *av_fetch(PL_fdpid,savefd,TRUE);
730 SvUPGRADE(sv, SVt_IV);
736 /* need to close fp without closing underlying fd */
737 int ofd = PerlIO_fileno(fp);
738 int dupfd = ofd >= 0 ? PerlLIO_dup(ofd) : -1;
739 #if defined(HAS_FCNTL) && defined(F_SETFD)
740 /* Assume if we have F_SETFD we have F_GETFD */
741 int coe = ofd >= 0 ? fcntl(ofd, F_GETFD) : -1;
744 PerlLIO_close(dupfd);
748 if (ofd < 0 || dupfd < 0) {
750 PerlLIO_close(dupfd);
754 PerlLIO_dup2(dupfd, ofd);
755 #if defined(HAS_FCNTL) && defined(F_SETFD)
756 /* The dup trick has lost close-on-exec on ofd */
757 fcntl(ofd,F_SETFD, coe);
759 PerlLIO_close(dupfd);
766 fd = PerlIO_fileno(fp);
768 #if defined(HAS_FCNTL) && defined(F_SETFD)
770 if (fcntl(fd, F_SETFD, fd > PL_maxsysfd) < 0) {
778 IoFLAGS(io) &= ~IOf_NOLINE;
780 if (IoTYPE(io) == IoTYPE_SOCKET
781 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
783 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
786 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,NULL))) {
800 IoTYPE(io) = savetype;
805 Perl_nextargv(pTHX_ GV *gv)
808 IO * const io = GvIOp(gv);
810 PERL_ARGS_ASSERT_NEXTARGV;
813 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
814 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
815 IoFLAGS(io) &= ~IOf_START;
818 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
819 SvREFCNT_inc_simple_NN(PL_defoutgv));
822 if (PL_filemode & (S_ISUID|S_ISGID)) {
823 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
826 (void)fchmod(PL_lastfd,PL_filemode);
828 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
835 while (av_tindex(GvAV(gv)) >= 0) {
837 SV *const sv = av_shift(GvAV(gv));
839 SvTAINTED_off(GvSVn(gv)); /* previous tainting irrelevant */
840 sv_setsv(GvSVn(gv),sv);
841 SvSETMAGIC(GvSV(gv));
842 PL_oldname = SvPVx(GvSV(gv), oldlen);
843 if (LIKELY(!PL_inplace)) {
844 if (do_open6(gv, PL_oldname, oldlen, NULL, NULL, 0)) {
845 return IoIFP(GvIOp(gv));
849 /* This very long block ends with return IoIFP(GvIOp(gv));
850 Both this block and the block above fall through on open
851 failure to the warning code, and then the while loop above tries
853 if (do_open_raw(gv, PL_oldname, oldlen, O_RDONLY, 0)) {
854 #ifndef FLEXFILENAMES
861 TAINT_PROPER("inplace open");
862 if (oldlen == 1 && *PL_oldname == '-') {
863 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
865 return IoIFP(GvIOp(gv));
867 #ifndef FLEXFILENAMES
868 filedev = PL_statbuf.st_dev;
869 fileino = PL_statbuf.st_ino;
871 PL_filemode = PL_statbuf.st_mode;
872 fileuid = PL_statbuf.st_uid;
873 filegid = PL_statbuf.st_gid;
874 if (!S_ISREG(PL_filemode)) {
875 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
876 "Can't do inplace edit: %s is not a regular file",
881 if (*PL_inplace && strNE(PL_inplace, "*")) {
882 const char *star = strchr(PL_inplace, '*');
884 const char *begin = PL_inplace;
887 sv_catpvn(sv, begin, star - begin);
888 sv_catpvn(sv, PL_oldname, oldlen);
890 } while ((star = strchr(begin, '*')));
895 sv_catpv(sv,PL_inplace);
897 #ifndef FLEXFILENAMES
898 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
899 && PL_statbuf.st_dev == filedev
900 && PL_statbuf.st_ino == fileino)
902 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
906 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
907 "Can't do inplace edit: %"SVf" would not be unique",
914 #if !defined(DOSISH) && !defined(__CYGWIN__)
915 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
916 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
917 "Can't rename %s to %"SVf": %s, skipping file",
918 PL_oldname, SVfARG(sv), Strerror(errno));
924 (void)PerlLIO_unlink(SvPVX_const(sv));
925 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
926 do_open_raw(gv, SvPVX_const(sv), SvCUR(sv), O_RDONLY, 0);
929 (void)UNLINK(SvPVX_const(sv));
930 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
931 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
932 "Can't rename %s to %"SVf": %s, skipping file",
933 PL_oldname, SVfARG(sv), Strerror(errno) );
937 (void)UNLINK(PL_oldname);
941 #if !defined(DOSISH) && !defined(AMIGAOS)
942 # ifndef VMS /* Don't delete; use automatic file versioning */
943 if (UNLINK(PL_oldname) < 0) {
944 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
945 "Can't remove %s: %s, skipping file",
946 PL_oldname, Strerror(errno) );
952 Perl_croak(aTHX_ "Can't do inplace edit without backup");
956 sv_setpvn(sv,PL_oldname,oldlen);
957 SETERRNO(0,0); /* in case sprintf set errno */
958 if (!Perl_do_open_raw(aTHX_ PL_argvoutgv, SvPVX_const(sv),
961 O_WRONLY|O_CREAT|O_TRUNC, 0
963 O_WRONLY|O_CREAT|OPEN_EXCL, 0600
966 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
967 PL_oldname, Strerror(errno) );
971 setdefout(PL_argvoutgv);
972 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
973 if (PL_lastfd >= 0) {
974 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
976 (void)fchmod(PL_lastfd,PL_filemode);
978 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
980 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
983 rc = fchown(PL_lastfd,fileuid,filegid);
986 rc = PerlLIO_chown(PL_oldname,fileuid,filegid);
989 /* XXX silently ignore failures */
993 return IoIFP(GvIOp(gv));
995 } /* successful do_open_raw(), PL_inplace non-NULL */
997 if (ckWARN_d(WARN_INPLACE)) {
998 const int eno = errno;
999 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
1000 && !S_ISREG(PL_statbuf.st_mode)) {
1001 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
1002 "Can't do inplace edit: %s is not a regular file",
1006 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
1007 PL_oldname, Strerror(eno));
1011 if (io && (IoFLAGS(io) & IOf_ARGV))
1012 IoFLAGS(io) |= IOf_START;
1014 (void)do_close(PL_argvoutgv,FALSE);
1015 if (io && (IoFLAGS(io) & IOf_ARGV)
1016 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
1018 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
1020 SvREFCNT_dec_NN(oldout);
1023 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
1028 /* explicit renamed to avoid C++ conflict -- kja */
1030 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
1038 if (!gv || !isGV_with_GP(gv)) {
1040 SETERRNO(EBADF,SS_IVCHAN);
1044 if (!io) { /* never opened */
1047 SETERRNO(EBADF,SS_IVCHAN);
1051 retval = io_close(io, not_implicit);
1055 IoLINES_LEFT(io) = IoPAGE_LEN(io);
1057 IoTYPE(io) = IoTYPE_CLOSED;
1062 Perl_io_close(pTHX_ IO *io, bool not_implicit)
1065 bool retval = FALSE;
1067 PERL_ARGS_ASSERT_IO_CLOSE;
1070 if (IoTYPE(io) == IoTYPE_PIPE) {
1071 const int status = PerlProc_pclose(IoIFP(io));
1073 STATUS_NATIVE_CHILD_SET(status);
1074 retval = (STATUS_UNIX == 0);
1077 retval = (status != -1);
1080 else if (IoTYPE(io) == IoTYPE_STD)
1083 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
1084 const bool prev_err = PerlIO_error(IoOFP(io));
1085 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
1086 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
1089 const bool prev_err = PerlIO_error(IoIFP(io));
1090 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1093 IoOFP(io) = IoIFP(io) = NULL;
1095 else if (not_implicit) {
1096 SETERRNO(EBADF,SS_IVCHAN);
1103 Perl_do_eof(pTHX_ GV *gv)
1106 IO * const io = GvIO(gv);
1108 PERL_ARGS_ASSERT_DO_EOF;
1112 else if (IoTYPE(io) == IoTYPE_WRONLY)
1113 report_wrongway_fh(gv, '>');
1116 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1117 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1118 return FALSE; /* this is the most usual case */
1122 /* getc and ungetc can stomp on errno */
1124 const int ch = PerlIO_getc(IoIFP(io));
1126 (void)PerlIO_ungetc(IoIFP(io),ch);
1133 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1134 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1135 PerlIO_set_cnt(IoIFP(io),-1);
1137 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1138 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
1142 return TRUE; /* normal fp, definitely end of file */
1148 Perl_do_tell(pTHX_ GV *gv)
1151 IO *const io = GvIO(gv);
1154 PERL_ARGS_ASSERT_DO_TELL;
1156 if (io && (fp = IoIFP(io))) {
1157 return PerlIO_tell(fp);
1160 SETERRNO(EBADF,RMS_IFI);
1165 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1168 IO *const io = GvIO(gv);
1171 if (io && (fp = IoIFP(io))) {
1172 return PerlIO_seek(fp, pos, whence) >= 0;
1175 SETERRNO(EBADF,RMS_IFI);
1180 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1183 IO *const io = GvIO(gv);
1186 PERL_ARGS_ASSERT_DO_SYSSEEK;
1188 if (io && (fp = IoIFP(io))) {
1189 int fd = PerlIO_fileno(fp);
1191 return PerlLIO_lseek(fd, pos, whence);
1195 SETERRNO(EBADF,RMS_IFI);
1200 Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
1202 int mode = O_BINARY;
1208 if (s[2] == 'a' && s[3] == 'w'
1209 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1218 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1219 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1228 goto fail_discipline;
1231 else if (isSPACE(*s)) {
1238 end = strchr(s+1, ':');
1241 #ifndef PERLIO_LAYERS
1242 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1253 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1255 my_chsize(int fd, Off_t length)
1258 /* code courtesy of William Kucharski */
1263 if (PerlLIO_fstat(fd, &filebuf) < 0)
1266 if (filebuf.st_size < length) {
1268 /* extend file length */
1270 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1273 /* write a "0" byte */
1275 if ((PerlLIO_write(fd, "", 1)) != 1)
1279 /* truncate length */
1283 fl.l_start = length;
1284 fl.l_type = F_WRLCK; /* write lock on file space */
1287 * This relies on the UNDOCUMENTED F_FREESP argument to
1288 * fcntl(2), which truncates the file so that it ends at the
1289 * position indicated by fl.l_start.
1291 * Will minor miracles never cease?
1294 if (fcntl(fd, F_FREESP, &fl) < 0)
1300 Perl_croak_nocontext("truncate not implemented");
1301 #endif /* F_FREESP */
1304 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1307 Perl_do_print(pTHX_ SV *sv, PerlIO *fp)
1311 PERL_ARGS_ASSERT_DO_PRINT;
1313 /* assuming fp is checked earlier */
1316 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
1317 assert(!SvGMAGICAL(sv));
1319 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1321 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1322 return !PerlIO_error(fp);
1326 /* Do this first to trigger any overloading. */
1327 const char *tmps = SvPV_const(sv, len);
1331 if (PerlIO_isutf8(fp)) { /* If the stream is utf8 ... */
1332 if (!SvUTF8(sv)) { /* Convert to utf8 if necessary */
1333 /* We don't modify the original scalar. */
1334 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1335 tmps = (char *) tmpbuf;
1337 else if (ckWARN4_d(WARN_UTF8, WARN_SURROGATE, WARN_NON_UNICODE, WARN_NONCHAR)) {
1338 (void) check_utf8_print((const U8*) tmps, len);
1340 } /* else stream isn't utf8 */
1341 else if (DO_UTF8(sv)) { /* But if is utf8 internally, attempt to
1343 STRLEN tmplen = len;
1345 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
1348 /* Here, succeeded in downgrading from utf8. Set up to below
1349 * output the converted value */
1351 tmps = (char *) tmpbuf;
1354 else { /* Non-utf8 output stream, but string only representable in
1356 assert((char *)result == tmps);
1357 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
1358 "Wide character in %s",
1359 PL_op ? OP_DESC(PL_op) : "print"
1361 /* Could also check that isn't one of the things to avoid
1362 * in utf8 by using check_utf8_print(), but not doing so,
1363 * since the stream isn't a UTF8 stream */
1366 /* To detect whether the process is about to overstep its
1367 * filesize limit we would need getrlimit(). We could then
1368 * also transparently raise the limit with setrlimit() --
1369 * but only until the system hard limit/the filesystem limit,
1370 * at which we would get EPERM. Note that when using buffered
1371 * io the write failure can be delayed until the flush/close. --jhi */
1372 if (len && (PerlIO_write(fp,tmps,len) == 0))
1375 return happy ? !PerlIO_error(fp) : FALSE;
1380 Perl_my_stat_flags(pTHX_ const U32 flags)
1387 if (PL_op->op_flags & OPf_REF) {
1391 return PL_laststatval;
1394 PL_laststype = OP_STAT;
1395 PL_statgv = gv ? gv : (GV *)io;
1396 sv_setpvs(PL_statname, "");
1399 int fd = PerlIO_fileno(IoIFP(io));
1401 return (PL_laststatval = PerlLIO_fstat(fd, &PL_statcache));
1403 } else if (IoDIRP(io)) {
1404 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
1407 PL_laststatval = -1;
1411 else if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1413 return PL_laststatval;
1415 SV* const sv = TOPs;
1418 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
1421 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
1422 io = MUTABLE_IO(SvRV(sv));
1424 goto do_fstat_have_io;
1427 s = SvPV_flags_const(sv, len, flags);
1429 sv_setpvn(PL_statname, s, len);
1430 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1431 PL_laststype = OP_STAT;
1432 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1433 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(s)) {
1434 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
1435 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1438 return PL_laststatval;
1444 Perl_my_lstat_flags(pTHX_ const U32 flags)
1447 static const char* const no_prev_lstat = "The stat preceding -l _ wasn't an lstat";
1450 SV* const sv = TOPs;
1452 if (PL_op->op_flags & OPf_REF) {
1453 if (cGVOP_gv == PL_defgv) {
1454 if (PL_laststype != OP_LSTAT)
1455 Perl_croak(aTHX_ "%s", no_prev_lstat);
1456 return PL_laststatval;
1458 PL_laststatval = -1;
1459 if (ckWARN(WARN_IO)) {
1460 /* diag_listed_as: Use of -l on filehandle%s */
1461 Perl_warner(aTHX_ packWARN(WARN_IO),
1462 "Use of -l on filehandle %"HEKf,
1463 HEKfARG(GvENAME_HEK(cGVOP_gv)));
1467 if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1469 if (PL_laststype != OP_LSTAT)
1470 Perl_croak(aTHX_ "%s", no_prev_lstat);
1471 return PL_laststatval;
1474 PL_laststype = OP_LSTAT;
1476 if ( ( (SvROK(sv) && ( isGV_with_GP(SvRV(sv))
1477 || (isio = SvTYPE(SvRV(sv)) == SVt_PVIO) )
1481 && ckWARN(WARN_IO)) {
1483 /* diag_listed_as: Use of -l on filehandle%s */
1484 Perl_warner(aTHX_ packWARN(WARN_IO),
1485 "Use of -l on filehandle");
1487 /* diag_listed_as: Use of -l on filehandle%s */
1488 Perl_warner(aTHX_ packWARN(WARN_IO),
1489 "Use of -l on filehandle %"HEKf,
1490 GvENAME_HEK((const GV *)
1491 (SvROK(sv) ? SvRV(sv) : sv)));
1493 file = SvPV_flags_const_nolen(sv, flags);
1494 sv_setpv(PL_statname,file);
1495 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
1496 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(file)) {
1497 GCC_DIAG_IGNORE(-Wformat-nonliteral); /* PL_warn_nl is constant */
1498 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1501 return PL_laststatval;
1505 S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1507 const int e = errno;
1508 PERL_ARGS_ASSERT_EXEC_FAILED;
1509 if (ckWARN(WARN_EXEC))
1510 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1513 int rc = PerlLIO_write(fd, (void*)&e, sizeof(int));
1514 /* silently ignore failures */
1515 PERL_UNUSED_VAR(rc);
1521 Perl_do_aexec5(pTHX_ SV *really, SV **mark, SV **sp,
1522 int fd, int do_report)
1525 PERL_ARGS_ASSERT_DO_AEXEC5;
1526 #if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
1527 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1531 const char *tmps = NULL;
1532 Newx(PL_Argv, sp - mark + 1, const char*);
1535 while (++mark <= sp) {
1537 *a++ = SvPV_nolen_const(*mark);
1543 tmps = SvPV_nolen_const(really);
1544 if ((!really && *PL_Argv[0] != '/') ||
1545 (really && *tmps != '/')) /* will execvp use PATH? */
1546 TAINT_ENV(); /* testing IFS here is overkill, probably */
1548 if (really && *tmps)
1549 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1551 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1553 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
1561 Perl_do_execfree(pTHX)
1570 #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
1573 Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
1580 /* Make a copy so we can change it */
1581 const Size_t cmdlen = strlen(incmd) + 1;
1583 PERL_ARGS_ASSERT_DO_EXEC3;
1585 Newx(buf, cmdlen, char);
1587 memcpy(cmd, incmd, cmdlen);
1589 while (*cmd && isSPACE(*cmd))
1592 /* save an extra exec if possible */
1596 char flags[PERL_FLAGS_MAX];
1597 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1598 strnEQ(cmd+PL_cshlen," -c",3)) {
1599 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
1600 s = cmd+PL_cshlen+3;
1603 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
1608 char * const ncmd = s;
1614 if (s[-1] == '\'') {
1617 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
1620 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
1629 /* see if there are shell metacharacters in it */
1631 if (*cmd == '.' && isSPACE(cmd[1]))
1634 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1638 while (isWORDCHAR(*s))
1639 s++; /* catch VAR=val gizmo */
1643 for (s = cmd; *s; s++) {
1644 if (*s != ' ' && !isALPHA(*s) &&
1645 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1646 if (*s == '\n' && !s[1]) {
1650 /* handle the 2>&1 construct at the end */
1651 if (*s == '>' && s[1] == '&' && s[2] == '1'
1652 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1653 && (!s[3] || isSPACE(s[3])))
1655 const char *t = s + 3;
1657 while (*t && isSPACE(*t))
1659 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1666 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
1668 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
1674 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*);
1675 PL_Cmd = savepvn(cmd, s-cmd);
1677 for (s = PL_Cmd; *s;) {
1682 while (*s && !isSPACE(*s))
1690 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1692 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1696 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
1703 #endif /* OS2 || WIN32 */
1706 #include <starlet.h> /* for sys$delprc */
1710 Perl_apply(pTHX_ I32 type, SV **mark, SV **sp)
1715 const char *const what = PL_op_name[type];
1718 SV ** const oldmark = mark;
1719 bool killgp = FALSE;
1721 PERL_ARGS_ASSERT_APPLY;
1723 PERL_UNUSED_VAR(what); /* may not be used depending on compile options */
1725 /* Doing this ahead of the switch statement preserves the old behaviour,
1726 where attempting to use kill as a taint test test would fail on
1727 platforms where kill was not defined. */
1729 if (type == OP_KILL)
1730 Perl_die(aTHX_ PL_no_func, what);
1733 if (type == OP_CHOWN)
1734 Perl_die(aTHX_ PL_no_func, what);
1738 #define APPLY_TAINT_PROPER() \
1740 if (TAINT_get) { TAINT_PROPER(what); } \
1743 /* This is a first heuristic; it doesn't catch tainting magic. */
1745 while (++mark <= sp) {
1746 if (SvTAINTED(*mark)) {
1755 APPLY_TAINT_PROPER();
1758 APPLY_TAINT_PROPER();
1760 while (++mark <= sp) {
1762 if ((gv = MAYBE_DEREF_GV(*mark))) {
1763 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1765 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
1766 APPLY_TAINT_PROPER();
1768 SETERRNO(EBADF,RMS_IFI);
1770 } else if (fchmod(fd, val))
1773 Perl_die(aTHX_ PL_no_func, "fchmod");
1781 const char *name = SvPV_nomg_const(*mark, len);
1782 APPLY_TAINT_PROPER();
1783 if (!IS_SAFE_PATHNAME(name, len, "chmod") ||
1784 PerlLIO_chmod(name, val)) {
1793 APPLY_TAINT_PROPER();
1794 if (sp - mark > 2) {
1796 val = SvIVx(*++mark);
1797 val2 = SvIVx(*++mark);
1798 APPLY_TAINT_PROPER();
1800 while (++mark <= sp) {
1802 if ((gv = MAYBE_DEREF_GV(*mark))) {
1803 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1805 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
1806 APPLY_TAINT_PROPER();
1808 SETERRNO(EBADF,RMS_IFI);
1810 } else if (fchown(fd, val, val2))
1813 Perl_die(aTHX_ PL_no_func, "fchown");
1821 const char *name = SvPV_nomg_const(*mark, len);
1822 APPLY_TAINT_PROPER();
1823 if (!IS_SAFE_PATHNAME(name, len, "chown") ||
1824 PerlLIO_chown(name, val, val2)) {
1833 XXX Should we make lchown() directly available from perl?
1834 For now, we'll let Configure test for HAS_LCHOWN, but do
1835 nothing in the core.
1840 APPLY_TAINT_PROPER();
1843 s = SvPVx_const(*++mark, len);
1844 if (*s == '-' && isALPHA(s[1]))
1851 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
1855 if ((val = whichsig_pvn(s, len)) < 0)
1856 Perl_croak(aTHX_ "Unrecognized signal name \"%"SVf"\"", SVfARG(*mark));
1867 APPLY_TAINT_PROPER();
1870 /* kill() doesn't do process groups (job trees?) under VMS */
1871 if (val == SIGKILL) {
1872 /* Use native sys$delprc() to insure that target process is
1873 * deleted; supervisor-mode images don't pay attention to
1874 * CRTL's emulation of Unix-style signals and kill()
1876 while (++mark <= sp) {
1878 unsigned long int __vmssts;
1880 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1881 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1882 proc = SvIV_nomg(*mark);
1883 APPLY_TAINT_PROPER();
1884 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1888 case SS$_NOSUCHNODE:
1889 SETERRNO(ESRCH,__vmssts);
1892 SETERRNO(EPERM,__vmssts);
1895 SETERRNO(EVMSERR,__vmssts);
1903 while (++mark <= sp) {
1906 if (!(SvNIOK(*mark) || looks_like_number(*mark)))
1907 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1908 proc = SvIV_nomg(*mark);
1909 APPLY_TAINT_PROPER();
1911 /* use killpg in preference, as the killpg() wrapper for Win32
1912 * understands process groups, but the kill() wrapper doesn't */
1913 if (killgp ? PerlProc_killpg(proc, val)
1914 : PerlProc_kill(proc, val))
1916 if (PerlProc_kill(killgp ? -proc: proc, val))
1924 APPLY_TAINT_PROPER();
1926 while (++mark <= sp) {
1927 s = SvPV_const(*mark, len);
1928 APPLY_TAINT_PROPER();
1929 if (!IS_SAFE_PATHNAME(s, len, "unlink")) {
1932 else if (PL_unsafe) {
1936 else { /* don't let root wipe out directories without -U */
1937 if (PerlLIO_lstat(s,&PL_statbuf) < 0)
1939 else if (S_ISDIR(PL_statbuf.st_mode)) {
1941 SETERRNO(EISDIR, SS_NOPRIV);
1950 #if defined(HAS_UTIME) || defined(HAS_FUTIMES)
1952 APPLY_TAINT_PROPER();
1953 if (sp - mark > 2) {
1954 #if defined(HAS_FUTIMES)
1955 struct timeval utbuf[2];
1956 void *utbufp = utbuf;
1957 #elif defined(I_UTIME) || defined(VMS)
1958 struct utimbuf utbuf;
1959 struct utimbuf *utbufp = &utbuf;
1965 void *utbufp = &utbuf;
1968 SV* const accessed = *++mark;
1969 SV* const modified = *++mark;
1971 /* Be like C, and if both times are undefined, let the C
1972 * library figure out what to do. This usually means
1973 * "current time". */
1975 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
1978 Zero(&utbuf, sizeof utbuf, char);
1980 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
1981 utbuf[0].tv_usec = 0;
1982 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
1983 utbuf[1].tv_usec = 0;
1984 #elif defined(BIG_TIME)
1985 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
1986 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
1988 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
1989 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
1992 APPLY_TAINT_PROPER();
1994 while (++mark <= sp) {
1996 if ((gv = MAYBE_DEREF_GV(*mark))) {
1997 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1999 int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
2000 APPLY_TAINT_PROPER();
2002 SETERRNO(EBADF,RMS_IFI);
2004 } else if (futimes(fd, (struct timeval *) utbufp))
2007 Perl_die(aTHX_ PL_no_func, "futimes");
2015 const char * const name = SvPV_nomg_const(*mark, len);
2016 APPLY_TAINT_PROPER();
2017 if (!IS_SAFE_PATHNAME(name, len, "utime")) {
2022 if (utimes(name, (struct timeval *)utbufp))
2024 if (PerlLIO_utime(name, utbufp))
2038 #undef APPLY_TAINT_PROPER
2041 /* Do the permissions allow some operation? Assumes statcache already set. */
2042 #ifndef VMS /* VMS' cando is in vms.c */
2044 Perl_cando(pTHX_ Mode_t mode, bool effective, const Stat_t *statbufp)
2045 /* effective is a flag, true for EUID, or for checking if the effective gid
2046 * is in the list of groups returned from getgroups().
2051 PERL_ARGS_ASSERT_CANDO;
2054 /* [Comments and code from Len Reed]
2055 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
2056 * to write-protected files. The execute permission bit is set
2057 * by the Microsoft C library stat() function for the following:
2062 * All files and directories are readable.
2063 * Directories and special files, e.g. "CON", cannot be
2065 * [Comment by Tom Dinger -- a directory can have the write-protect
2066 * bit set in the file system, but DOS permits changes to
2067 * the directory anyway. In addition, all bets are off
2068 * here for networked software, such as Novell and
2072 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
2073 * too so it will actually look into the files for magic numbers
2075 return (mode & statbufp->st_mode) ? TRUE : FALSE;
2077 #else /* ! DOSISH */
2079 if (ingroup(544,effective)) { /* member of Administrators */
2081 if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 0) { /* root is special */
2083 if (mode == S_IXUSR) {
2084 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
2088 return TRUE; /* root reads and writes anything */
2091 if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) {
2092 if (statbufp->st_mode & mode)
2093 return TRUE; /* ok as "user" */
2095 else if (ingroup(statbufp->st_gid,effective)) {
2096 if (statbufp->st_mode & mode >> 3)
2097 return TRUE; /* ok as "group" */
2099 else if (statbufp->st_mode & mode >> 6)
2100 return TRUE; /* ok as "other" */
2102 #endif /* ! DOSISH */
2107 S_ingroup(pTHX_ Gid_t testgid, bool effective)
2110 if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid()))
2112 #ifdef HAS_GETGROUPS
2114 Groups_t *gary = NULL;
2118 anum = getgroups(0, gary);
2120 Newx(gary, anum, Groups_t);
2121 anum = getgroups(anum, gary);
2123 if (gary[anum] == testgid) {
2137 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
2140 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
2143 const key_t key = (key_t)SvNVx(*++mark);
2144 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
2145 const I32 flags = SvIVx(*++mark);
2147 PERL_ARGS_ASSERT_DO_IPCGET;
2148 PERL_UNUSED_ARG(sp);
2155 return msgget(key, flags);
2159 return semget(key, (int) SvIV(nsv), flags);
2163 return shmget(key, (size_t) SvUV(nsv), flags);
2165 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2167 /* diag_listed_as: msg%s not implemented */
2168 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2171 return -1; /* should never happen */
2175 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
2180 const I32 id = SvIVx(*++mark);
2182 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
2184 const I32 cmd = SvIVx(*++mark);
2185 SV * const astr = *++mark;
2186 STRLEN infosize = 0;
2187 I32 getinfo = (cmd == IPC_STAT);
2189 PERL_ARGS_ASSERT_DO_IPCCTL;
2190 PERL_UNUSED_ARG(sp);
2196 if (cmd == IPC_STAT || cmd == IPC_SET)
2197 infosize = sizeof(struct msqid_ds);
2202 if (cmd == IPC_STAT || cmd == IPC_SET)
2203 infosize = sizeof(struct shmid_ds);
2209 if (cmd == IPC_STAT || cmd == IPC_SET)
2210 infosize = sizeof(struct semid_ds);
2211 else if (cmd == GETALL || cmd == SETALL)
2213 struct semid_ds semds;
2215 #ifdef EXTRA_F_IN_SEMUN_BUF
2216 semun.buff = &semds;
2220 getinfo = (cmd == GETALL);
2221 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2223 infosize = semds.sem_nsems * sizeof(short);
2224 /* "short" is technically wrong but much more portable
2225 than guessing about u_?short(_t)? */
2228 /* diag_listed_as: sem%s not implemented */
2229 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2233 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2235 /* diag_listed_as: shm%s not implemented */
2236 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2244 SvPV_force_nolen(astr);
2245 a = SvGROW(astr, infosize+1);
2250 a = SvPV(astr, len);
2251 if (len != infosize)
2252 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2260 const IV i = SvIV(astr);
2261 a = INT2PTR(char *,i); /* ouch */
2268 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2274 union semun unsemds;
2277 unsemds.val = PTR2nat(a);
2280 #ifdef EXTRA_F_IN_SEMUN_BUF
2281 unsemds.buff = (struct semid_ds *)a;
2283 unsemds.buf = (struct semid_ds *)a;
2286 ret = Semctl(id, n, cmd, unsemds);
2288 /* diag_listed_as: sem%s not implemented */
2289 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2296 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2300 if (getinfo && ret >= 0) {
2301 SvCUR_set(astr, infosize);
2302 *SvEND(astr) = '\0';
2309 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2314 const I32 id = SvIVx(*++mark);
2315 SV * const mstr = *++mark;
2316 const I32 flags = SvIVx(*++mark);
2317 const char * const mbuf = SvPV_const(mstr, len);
2318 const I32 msize = len - sizeof(long);
2320 PERL_ARGS_ASSERT_DO_MSGSND;
2321 PERL_UNUSED_ARG(sp);
2324 Perl_croak(aTHX_ "Arg too short for msgsnd");
2326 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2328 PERL_UNUSED_ARG(sp);
2329 PERL_UNUSED_ARG(mark);
2330 /* diag_listed_as: msg%s not implemented */
2331 Perl_croak(aTHX_ "msgsnd not implemented");
2337 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2343 I32 msize, flags, ret;
2344 const I32 id = SvIVx(*++mark);
2345 SV * const mstr = *++mark;
2347 PERL_ARGS_ASSERT_DO_MSGRCV;
2348 PERL_UNUSED_ARG(sp);
2350 /* suppress warning when reading into undef var --jhi */
2352 sv_setpvs(mstr, "");
2353 msize = SvIVx(*++mark);
2354 mtype = (long)SvIVx(*++mark);
2355 flags = SvIVx(*++mark);
2356 SvPV_force_nolen(mstr);
2357 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2360 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2362 SvCUR_set(mstr, sizeof(long)+ret);
2363 *SvEND(mstr) = '\0';
2364 /* who knows who has been playing with this message? */
2369 PERL_UNUSED_ARG(sp);
2370 PERL_UNUSED_ARG(mark);
2371 /* diag_listed_as: msg%s not implemented */
2372 Perl_croak(aTHX_ "msgrcv not implemented");
2378 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2383 const I32 id = SvIVx(*++mark);
2384 SV * const opstr = *++mark;
2385 const char * const opbuf = SvPV_const(opstr, opsize);
2387 PERL_ARGS_ASSERT_DO_SEMOP;
2388 PERL_UNUSED_ARG(sp);
2390 if (opsize < 3 * SHORTSIZE
2391 || (opsize % (3 * SHORTSIZE))) {
2392 SETERRNO(EINVAL,LIB_INVARG);
2396 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2398 const int nsops = opsize / (3 * sizeof (short));
2400 short * const ops = (short *) opbuf;
2402 struct sembuf *temps, *t;
2405 Newx (temps, nsops, struct sembuf);
2413 result = semop(id, temps, nsops);
2418 /* diag_listed_as: sem%s not implemented */
2419 Perl_croak(aTHX_ "semop not implemented");
2424 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2429 struct shmid_ds shmds;
2430 const I32 id = SvIVx(*++mark);
2431 SV * const mstr = *++mark;
2432 const I32 mpos = SvIVx(*++mark);
2433 const I32 msize = SvIVx(*++mark);
2435 PERL_ARGS_ASSERT_DO_SHMIO;
2436 PERL_UNUSED_ARG(sp);
2439 if (shmctl(id, IPC_STAT, &shmds) == -1)
2441 if (mpos < 0 || msize < 0
2442 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
2443 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2446 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2447 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2449 if (optype == OP_SHMREAD) {
2451 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2453 SvUPGRADE(mstr, SVt_PV);
2455 sv_setpvs(mstr, "");
2457 mbuf = SvGROW(mstr, (STRLEN)msize+1);
2459 Copy(shm + mpos, mbuf, msize, char);
2460 SvCUR_set(mstr, msize);
2461 *SvEND(mstr) = '\0';
2463 /* who knows who has been playing with this shared memory? */
2469 const char *mbuf = SvPV_const(mstr, len);
2470 const I32 n = ((I32)len > msize) ? msize : (I32)len;
2471 Copy(mbuf, shm + mpos, n, char);
2473 memzero(shm + mpos + n, msize - n);
2477 /* diag_listed_as: shm%s not implemented */
2478 Perl_croak(aTHX_ "shm I/O not implemented");
2483 #endif /* SYSV IPC */
2488 =for apidoc start_glob
2490 Function called by C<do_readline> to spawn a glob (or do the glob inside
2491 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2492 this glob starter is only used by miniperl during the build process.
2493 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2499 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2502 SV * const tmpcmd = newSV(0);
2505 const char *s = SvPV(tmpglob, len);
2507 PERL_ARGS_ASSERT_START_GLOB;
2509 if (!IS_SAFE_SYSCALL(s, len, "pattern", "glob"))
2514 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2515 /* since spawning off a process is a real performance hit */
2522 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
2527 sv_setpv(tmpcmd, "for a in ");
2528 sv_catsv(tmpcmd, tmpglob);
2529 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2532 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2533 sv_catsv(tmpcmd, tmpglob);
2535 sv_setpv(tmpcmd, "perlglob ");
2536 sv_catsv(tmpcmd, tmpglob);
2537 sv_catpv(tmpcmd, " |");
2542 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2543 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2544 sv_catsv(tmpcmd, tmpglob);
2545 sv_catpv(tmpcmd, "' 2>/dev/null |");
2547 sv_setpv(tmpcmd, "echo ");
2548 sv_catsv(tmpcmd, tmpglob);
2549 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2551 #endif /* !DOSISH */
2553 GV * const envgv = gv_fetchpvs("ENV", 0, SVt_PVHV);
2554 SV ** const home = hv_fetchs(GvHV(envgv), "HOME", 0);
2555 SV ** const path = hv_fetchs(GvHV(envgv), "PATH", 0);
2556 if (home && *home) SvGETMAGIC(*home);
2557 if (path && *path) SvGETMAGIC(*path);
2558 save_hash(gv_fetchpvs("ENV", 0, SVt_PVHV));
2559 if (home && *home) SvSETMAGIC(*home);
2560 if (path && *path) SvSETMAGIC(*path);
2562 (void)do_open6(PL_last_in_gv, SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2568 if (!fp && ckWARN(WARN_GLOB)) {
2569 Perl_warner(aTHX_ packWARN(WARN_GLOB), "glob failed (can't start child: %s)",
2578 * c-indentation-style: bsd
2580 * indent-tabs-mode: nil
2583 * ex: set ts=8 sts=4 sw=4 et: