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 Perl_do_openn(pTHX_ GV *gv, const char *oname, I32 len, int as_raw,
65 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
69 IO * const io = GvIOn(gv);
70 PerlIO *saveifp = NULL;
71 PerlIO *saveofp = NULL;
73 char savetype = IoTYPE_CLOSED;
78 bool was_fdopen = FALSE;
79 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
81 char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
84 PERL_ARGS_ASSERT_DO_OPENN;
86 Zero(mode,sizeof(mode),char);
87 PL_forkprocess = 1; /* assume true if no fork */
89 /* Collect default raw/crlf info from the op */
90 if (PL_op && PL_op->op_type == OP_OPEN) {
91 /* set up IO layers */
92 const U8 flags = PL_op->op_private;
93 in_raw = (flags & OPpOPEN_IN_RAW);
94 in_crlf = (flags & OPpOPEN_IN_CRLF);
95 out_raw = (flags & OPpOPEN_OUT_RAW);
96 out_crlf = (flags & OPpOPEN_OUT_CRLF);
99 /* If currently open - close before we re-open */
101 fd = PerlIO_fileno(IoIFP(io));
102 if (IoTYPE(io) == IoTYPE_STD) {
103 /* This is a clone of one of STD* handles */
106 else if (fd >= 0 && fd <= PL_maxsysfd) {
107 /* This is one of the original STD* handles */
110 savetype = IoTYPE(io);
114 else if (IoTYPE(io) == IoTYPE_PIPE)
115 result = PerlProc_pclose(IoIFP(io));
116 else if (IoIFP(io) != IoOFP(io)) {
118 result = PerlIO_close(IoOFP(io));
119 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
122 result = PerlIO_close(IoIFP(io));
125 result = PerlIO_close(IoIFP(io));
126 if (result == EOF && fd > PL_maxsysfd) {
127 /* Why is this not Perl_warn*() call ? */
128 PerlIO_printf(Perl_error_log,
129 "Warning: unable to close filehandle %"HEKf" properly.\n",
130 HEKfARG(GvENAME_HEK(gv))
133 IoOFP(io) = IoIFP(io) = NULL;
137 /* sysopen style args, i.e. integer mode and permissions */
139 const int appendtrunc =
141 #ifdef O_APPEND /* Not fully portable. */
144 #ifdef O_TRUNC /* Not fully portable. */
148 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
152 Perl_croak(aTHX_ "panic: sysopen with multiple args, num_svs=%ld",
161 It might be (in OS/390 and Mac OS Classic it is)
167 This means that simple & with O_RDWR would look
168 like O_RDONLY is present. Therefore we have to
171 if ((ismodifying = (rawmode & modifyingmode))) {
172 if ((ismodifying & O_WRONLY) == O_WRONLY ||
173 (ismodifying & O_RDWR) == O_RDWR ||
174 (ismodifying & (O_CREAT|appendtrunc)))
175 TAINT_PROPER("sysopen");
177 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
179 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
180 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
183 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
185 namesv = newSVpvn_flags(oname, len, SVs_TEMP);
189 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
192 /* Regular (non-sys) open */
198 type = savepvn(oname, len);
202 /* Lose leading and trailing white space */
203 while (isSPACE(*type))
205 while (tend > type && isSPACE(tend[-1]))
211 /* New style explicit name, type is just mode and layer info */
213 if (SvROK(*svp) && !strchr(oname,'&')) {
215 Perl_warner(aTHX_ packWARN(WARN_IO),
216 "Can't open a reference");
217 SETERRNO(EINVAL, LIB_INVARG);
220 #endif /* USE_STDIO */
221 p = (SvOK(*svp) || SvGMAGICAL(*svp)) ? SvPV(*svp, nlen) : NULL;
223 if (p && !IS_SAFE_PATHNAME(p, nlen, "open"))
226 name = p ? savepvn(p, nlen) : savepvs("");
235 if ((*type == IoTYPE_RDWR) && /* scary */
236 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
237 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
238 TAINT_PROPER("open");
243 if (*type == IoTYPE_PIPE) {
245 if (type[1] != IoTYPE_STD) {
247 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
253 } while (isSPACE(*type));
259 /* command is missing 19990114 */
260 if (ckWARN(WARN_PIPE))
261 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
265 if (!(*name == '-' && name[1] == '\0') || num_svs)
267 TAINT_PROPER("piped open");
268 if (!num_svs && name[len-1] == '|') {
270 if (ckWARN(WARN_PIPE))
271 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
280 fp = PerlProc_popen_list(mode, num_svs, svp);
283 fp = PerlProc_popen(name,mode);
287 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
293 else if (*type == IoTYPE_WRONLY) {
294 TAINT_PROPER("open");
296 if (*type == IoTYPE_WRONLY) {
297 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
298 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
312 dodup = PERLIO_DUP_FD;
318 if (!num_svs && !*type && supplied_fp) {
319 /* "<+&" etc. is used by typemaps */
323 PerlIO *that_fp = NULL;
325 /* diag_listed_as: More than one argument to '%s' open */
326 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
328 while (isSPACE(*type))
332 || (SvPOKp(*svp) && looks_like_number(*svp))
337 else if (isDIGIT(*type)) {
343 thatio = sv_2io(*svp);
346 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
348 thatio = GvIO(thatgv);
352 SETERRNO(EINVAL,SS_IVCHAN);
356 if ((that_fp = IoIFP(thatio))) {
357 /* Flush stdio buffer before dup. --mjd
358 * Unfortunately SEEK_CURing 0 seems to
359 * be optimized away on most platforms;
360 * only Solaris and Linux seem to flush
363 /* sfio fails to clear error on next
364 sfwrite, contrary to documentation.
366 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
367 PerlIO_clearerr(that_fp);
369 /* On the other hand, do all platforms
370 * take gracefully to flushing a read-only
371 * filehandle? Perhaps we should do
372 * fsetpos(src)+fgetpos(dst)? --nik */
373 PerlIO_flush(that_fp);
374 fd = PerlIO_fileno(that_fp);
375 /* When dup()ing STDIN, STDOUT or STDERR
376 * explicitly set appropriate access mode */
377 if (that_fp == PerlIO_stdout()
378 || that_fp == PerlIO_stderr())
379 IoTYPE(io) = IoTYPE_WRONLY;
380 else if (that_fp == PerlIO_stdin())
381 IoTYPE(io) = IoTYPE_RDONLY;
382 /* When dup()ing a socket, say result is
384 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
385 IoTYPE(io) = IoTYPE_SOCKET;
393 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
397 fd = PerlLIO_dup(fd);
400 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
401 if (dodup && fd >= 0)
408 while (isSPACE(*type))
410 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
412 fp = PerlIO_stdout();
413 IoTYPE(io) = IoTYPE_STD;
415 /* diag_listed_as: More than one argument to '%s' open */
416 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
421 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
426 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
429 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
430 goto unknown_open_mode;
431 } /* IoTYPE_WRONLY */
432 else if (*type == IoTYPE_RDONLY) {
435 } while (isSPACE(*type));
444 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
447 IoTYPE(io) = IoTYPE_STD;
449 /* diag_listed_as: More than one argument to '%s' open */
450 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
455 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
460 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
462 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
463 goto unknown_open_mode;
464 } /* IoTYPE_RDONLY */
465 else if ((num_svs && /* '-|...' or '...|' */
466 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
467 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
469 type += 2; /* skip over '-|' */
473 while (tend > type && isSPACE(tend[-1]))
475 for (; isSPACE(*type); type++)
481 /* command is missing 19990114 */
482 if (ckWARN(WARN_PIPE))
483 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
487 if (!(*name == '-' && name[1] == '\0') || num_svs)
489 TAINT_PROPER("piped open");
498 fp = PerlProc_popen_list(mode,num_svs,svp);
501 fp = PerlProc_popen(name,mode);
503 IoTYPE(io) = IoTYPE_PIPE;
505 while (isSPACE(*type))
508 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
514 else { /* layer(Args) */
516 goto unknown_open_mode;
518 IoTYPE(io) = IoTYPE_RDONLY;
519 for (; isSPACE(*name); name++)
528 if (*name == '-' && name[1] == '\0') {
530 IoTYPE(io) = IoTYPE_STD;
534 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
539 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
544 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
545 && strchr(oname, '\n')
548 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
552 if (ckWARN(WARN_IO)) {
553 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
554 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
555 Perl_warner(aTHX_ packWARN(WARN_IO),
556 "Filehandle STD%s reopened as %"HEKf
558 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
559 HEKfARG(GvENAME_HEK(gv)));
561 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
562 Perl_warner(aTHX_ packWARN(WARN_IO),
563 "Filehandle STDIN reopened as %"HEKf" only for output",
564 HEKfARG(GvENAME_HEK(gv))
569 fd = PerlIO_fileno(fp);
570 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
571 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
572 * type probe for socket-ness.
574 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
575 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
576 /* If PerlIO claims to have fd we had better be able to fstat() it. */
577 (void) PerlIO_close(fp);
581 if (S_ISSOCK(PL_statbuf.st_mode))
582 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
586 !(PL_statbuf.st_mode & S_IFMT)
590 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
591 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
592 ) { /* on OS's that return 0 on fstat()ed pipe */
594 Sock_size_t buflen = sizeof tmpbuf;
595 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
596 || errno != ENOTSOCK)
597 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
598 /* but some return 0 for streams too, sigh */
600 #endif /* HAS_SOCKET */
601 #endif /* !PERL_MICRO */
605 * If this is a standard handle we discard all the layer stuff
606 * and just dup the fd into whatever was on the handle before !
609 if (saveifp) { /* must use old fp? */
610 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
611 then dup the new fileno down
614 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
615 if (saveofp != saveifp) { /* was a socket? */
616 PerlIO_close(saveofp);
620 /* Still a small can-of-worms here if (say) PerlIO::scalar
621 is assigned to (say) STDOUT - for now let dup2() fail
622 and provide the error
624 if (PerlLIO_dup2(fd, savefd) < 0) {
625 (void)PerlIO_close(fp);
629 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
630 char newname[FILENAME_MAX+1];
631 if (PerlIO_getname(fp, newname)) {
632 if (fd == PerlIO_fileno(PerlIO_stdout()))
633 vmssetuserlnm("SYS$OUTPUT", newname);
634 if (fd == PerlIO_fileno(PerlIO_stderr()))
635 vmssetuserlnm("SYS$ERROR", newname);
641 /* PL_fdpid isn't used on Windows, so avoid this useless work.
642 * XXX Probably the same for a lot of other places. */
647 sv = *av_fetch(PL_fdpid,fd,TRUE);
648 SvUPGRADE(sv, SVt_IV);
651 sv = *av_fetch(PL_fdpid,savefd,TRUE);
652 SvUPGRADE(sv, SVt_IV);
658 /* need to close fp without closing underlying fd */
659 int ofd = PerlIO_fileno(fp);
660 int dupfd = PerlLIO_dup(ofd);
661 #if defined(HAS_FCNTL) && defined(F_SETFD)
662 /* Assume if we have F_SETFD we have F_GETFD */
663 int coe = fcntl(ofd,F_GETFD);
666 PerlLIO_dup2(dupfd,ofd);
667 #if defined(HAS_FCNTL) && defined(F_SETFD)
668 /* The dup trick has lost close-on-exec on ofd */
669 fcntl(ofd,F_SETFD, coe);
671 PerlLIO_close(dupfd);
678 fd = PerlIO_fileno(fp);
680 #if defined(HAS_FCNTL) && defined(F_SETFD)
683 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
689 IoFLAGS(io) &= ~IOf_NOLINE;
691 if (IoTYPE(io) == IoTYPE_SOCKET
692 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
694 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
697 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
711 IoTYPE(io) = savetype;
716 Perl_nextargv(pTHX_ GV *gv)
720 #ifndef FLEXFILENAMES
726 IO * const io = GvIOp(gv);
728 PERL_ARGS_ASSERT_NEXTARGV;
731 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
732 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
733 IoFLAGS(io) &= ~IOf_START;
736 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
737 SvREFCNT_inc_simple_NN(PL_defoutgv));
740 if (PL_filemode & (S_ISUID|S_ISGID)) {
741 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
744 (void)fchmod(PL_lastfd,PL_filemode);
746 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
753 while (av_len(GvAV(gv)) >= 0) {
755 sv = av_shift(GvAV(gv));
757 SvTAINTED_off(GvSVn(gv)); /* previous tainting irrelevant */
758 sv_setsv(GvSVn(gv),sv);
759 SvSETMAGIC(GvSV(gv));
760 PL_oldname = SvPVx(GvSV(gv), oldlen);
761 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) {
763 TAINT_PROPER("inplace open");
764 if (oldlen == 1 && *PL_oldname == '-') {
765 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
767 return IoIFP(GvIOp(gv));
769 #ifndef FLEXFILENAMES
770 filedev = PL_statbuf.st_dev;
771 fileino = PL_statbuf.st_ino;
773 PL_filemode = PL_statbuf.st_mode;
774 fileuid = PL_statbuf.st_uid;
775 filegid = PL_statbuf.st_gid;
776 if (!S_ISREG(PL_filemode)) {
777 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
778 "Can't do inplace edit: %s is not a regular file",
783 if (*PL_inplace && strNE(PL_inplace, "*")) {
784 const char *star = strchr(PL_inplace, '*');
786 const char *begin = PL_inplace;
789 sv_catpvn(sv, begin, star - begin);
790 sv_catpvn(sv, PL_oldname, oldlen);
792 } while ((star = strchr(begin, '*')));
797 sv_catpv(sv,PL_inplace);
799 #ifndef FLEXFILENAMES
800 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
801 && PL_statbuf.st_dev == filedev
802 && PL_statbuf.st_ino == fileino)
804 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
808 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
809 "Can't do inplace edit: %"SVf" would not be unique",
816 #if !defined(DOSISH) && !defined(__CYGWIN__)
817 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
818 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
819 "Can't rename %s to %"SVf": %s, skipping file",
820 PL_oldname, SVfARG(sv), Strerror(errno));
826 (void)PerlLIO_unlink(SvPVX_const(sv));
827 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
828 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),TRUE,O_RDONLY,0,NULL);
831 (void)UNLINK(SvPVX_const(sv));
832 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
833 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
834 "Can't rename %s to %"SVf": %s, skipping file",
835 PL_oldname, SVfARG(sv), Strerror(errno) );
839 (void)UNLINK(PL_oldname);
843 #if !defined(DOSISH) && !defined(AMIGAOS)
844 # ifndef VMS /* Don't delete; use automatic file versioning */
845 if (UNLINK(PL_oldname) < 0) {
846 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
847 "Can't remove %s: %s, skipping file",
848 PL_oldname, Strerror(errno) );
854 Perl_croak(aTHX_ "Can't do inplace edit without backup");
858 sv_setpvn(sv,PL_oldname,oldlen);
859 SETERRNO(0,0); /* in case sprintf set errno */
860 if (!Perl_do_openn(aTHX_ PL_argvoutgv, (char*)SvPVX_const(sv),
863 O_WRONLY|O_CREAT|O_TRUNC,0,
865 O_WRONLY|O_CREAT|OPEN_EXCL,0600,
868 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
869 PL_oldname, Strerror(errno) );
873 setdefout(PL_argvoutgv);
874 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
875 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
877 (void)fchmod(PL_lastfd,PL_filemode);
879 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
881 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
883 (void)fchown(PL_lastfd,fileuid,filegid);
886 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
891 return IoIFP(GvIOp(gv));
894 if (ckWARN_d(WARN_INPLACE)) {
895 const int eno = errno;
896 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
897 && !S_ISREG(PL_statbuf.st_mode))
899 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
900 "Can't do inplace edit: %s is not a regular file",
904 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
905 PL_oldname, Strerror(eno));
909 if (io && (IoFLAGS(io) & IOf_ARGV))
910 IoFLAGS(io) |= IOf_START;
912 (void)do_close(PL_argvoutgv,FALSE);
913 if (io && (IoFLAGS(io) & IOf_ARGV)
914 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
916 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
918 SvREFCNT_dec_NN(oldout);
921 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
926 /* explicit renamed to avoid C++ conflict -- kja */
928 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
936 if (!gv || !isGV_with_GP(gv)) {
938 SETERRNO(EBADF,SS_IVCHAN);
942 if (!io) { /* never opened */
945 SETERRNO(EBADF,SS_IVCHAN);
949 retval = io_close(io, not_implicit);
953 IoLINES_LEFT(io) = IoPAGE_LEN(io);
955 IoTYPE(io) = IoTYPE_CLOSED;
960 Perl_io_close(pTHX_ IO *io, bool not_implicit)
965 PERL_ARGS_ASSERT_IO_CLOSE;
968 if (IoTYPE(io) == IoTYPE_PIPE) {
969 const int status = PerlProc_pclose(IoIFP(io));
971 STATUS_NATIVE_CHILD_SET(status);
972 retval = (STATUS_UNIX == 0);
975 retval = (status != -1);
978 else if (IoTYPE(io) == IoTYPE_STD)
981 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
982 const bool prev_err = PerlIO_error(IoOFP(io));
983 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
984 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
987 const bool prev_err = PerlIO_error(IoIFP(io));
988 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
991 IoOFP(io) = IoIFP(io) = NULL;
993 else if (not_implicit) {
994 SETERRNO(EBADF,SS_IVCHAN);
1001 Perl_do_eof(pTHX_ GV *gv)
1004 IO * const io = GvIO(gv);
1006 PERL_ARGS_ASSERT_DO_EOF;
1010 else if (IoTYPE(io) == IoTYPE_WRONLY)
1011 report_wrongway_fh(gv, '>');
1014 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1015 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1016 return FALSE; /* this is the most usual case */
1020 /* getc and ungetc can stomp on errno */
1022 const int ch = PerlIO_getc(IoIFP(io));
1024 (void)PerlIO_ungetc(IoIFP(io),ch);
1031 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1032 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1033 PerlIO_set_cnt(IoIFP(io),-1);
1035 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1036 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
1040 return TRUE; /* normal fp, definitely end of file */
1046 Perl_do_tell(pTHX_ GV *gv)
1049 IO *const io = GvIO(gv);
1052 PERL_ARGS_ASSERT_DO_TELL;
1054 if (io && (fp = IoIFP(io))) {
1055 #ifdef ULTRIX_STDIO_BOTCH
1057 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1059 return PerlIO_tell(fp);
1062 SETERRNO(EBADF,RMS_IFI);
1067 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1070 IO *const io = GvIO(gv);
1073 if (io && (fp = IoIFP(io))) {
1074 #ifdef ULTRIX_STDIO_BOTCH
1076 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1078 return PerlIO_seek(fp, pos, whence) >= 0;
1081 SETERRNO(EBADF,RMS_IFI);
1086 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1089 IO *const io = GvIO(gv);
1092 PERL_ARGS_ASSERT_DO_SYSSEEK;
1094 if (io && (fp = IoIFP(io)))
1095 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1097 SETERRNO(EBADF,RMS_IFI);
1102 Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
1104 int mode = O_BINARY;
1110 if (s[2] == 'a' && s[3] == 'w'
1111 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1120 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1121 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1130 goto fail_discipline;
1133 else if (isSPACE(*s)) {
1140 end = strchr(s+1, ':');
1143 #ifndef PERLIO_LAYERS
1144 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1155 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1157 my_chsize(int fd, Off_t length)
1160 /* code courtesy of William Kucharski */
1165 if (PerlLIO_fstat(fd, &filebuf) < 0)
1168 if (filebuf.st_size < length) {
1170 /* extend file length */
1172 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1175 /* write a "0" byte */
1177 if ((PerlLIO_write(fd, "", 1)) != 1)
1181 /* truncate length */
1185 fl.l_start = length;
1186 fl.l_type = F_WRLCK; /* write lock on file space */
1189 * This relies on the UNDOCUMENTED F_FREESP argument to
1190 * fcntl(2), which truncates the file so that it ends at the
1191 * position indicated by fl.l_start.
1193 * Will minor miracles never cease?
1196 if (fcntl(fd, F_FREESP, &fl) < 0)
1202 Perl_croak_nocontext("truncate not implemented");
1203 #endif /* F_FREESP */
1206 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1209 Perl_do_print(pTHX_ SV *sv, PerlIO *fp)
1213 PERL_ARGS_ASSERT_DO_PRINT;
1215 /* assuming fp is checked earlier */
1218 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
1219 assert(!SvGMAGICAL(sv));
1221 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1223 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1224 return !PerlIO_error(fp);
1228 /* Do this first to trigger any overloading. */
1229 const char *tmps = SvPV_const(sv, len);
1233 if (PerlIO_isutf8(fp)) { /* If the stream is utf8 ... */
1234 if (!SvUTF8(sv)) { /* Convert to utf8 if necessary */
1235 /* We don't modify the original scalar. */
1236 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1237 tmps = (char *) tmpbuf;
1239 else if (ckWARN4_d(WARN_UTF8, WARN_SURROGATE, WARN_NON_UNICODE, WARN_NONCHAR)) {
1240 (void) check_utf8_print((const U8*) tmps, len);
1242 } /* else stream isn't utf8 */
1243 else if (DO_UTF8(sv)) { /* But if is utf8 internally, attempt to
1245 STRLEN tmplen = len;
1247 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
1250 /* Here, succeeded in downgrading from utf8. Set up to below
1251 * output the converted value */
1253 tmps = (char *) tmpbuf;
1256 else { /* Non-utf8 output stream, but string only representable in
1258 assert((char *)result == tmps);
1259 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
1260 "Wide character in %s",
1261 PL_op ? OP_DESC(PL_op) : "print"
1263 /* Could also check that isn't one of the things to avoid
1264 * in utf8 by using check_utf8_print(), but not doing so,
1265 * since the stream isn't a UTF8 stream */
1268 /* To detect whether the process is about to overstep its
1269 * filesize limit we would need getrlimit(). We could then
1270 * also transparently raise the limit with setrlimit() --
1271 * but only until the system hard limit/the filesystem limit,
1272 * at which we would get EPERM. Note that when using buffered
1273 * io the write failure can be delayed until the flush/close. --jhi */
1274 if (len && (PerlIO_write(fp,tmps,len) == 0))
1277 return happy ? !PerlIO_error(fp) : FALSE;
1282 Perl_my_stat_flags(pTHX_ const U32 flags)
1289 if (PL_op->op_flags & OPf_REF) {
1293 return PL_laststatval;
1296 PL_laststype = OP_STAT;
1297 PL_statgv = gv ? gv : (GV *)io;
1298 sv_setpvs(PL_statname, "");
1301 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1302 } else if (IoDIRP(io)) {
1303 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
1306 PL_laststatval = -1;
1310 else if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1312 return PL_laststatval;
1314 SV* const sv = TOPs;
1317 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
1320 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
1321 io = MUTABLE_IO(SvRV(sv));
1323 goto do_fstat_have_io;
1326 s = SvPV_flags_const(sv, len, flags);
1328 sv_setpvn(PL_statname, s, len);
1329 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1330 PL_laststype = OP_STAT;
1331 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1332 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1333 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1334 return PL_laststatval;
1340 Perl_my_lstat_flags(pTHX_ const U32 flags)
1343 static const char* const no_prev_lstat = "The stat preceding -l _ wasn't an lstat";
1346 SV* const sv = TOPs;
1348 if (PL_op->op_flags & OPf_REF) {
1349 if (cGVOP_gv == PL_defgv) {
1350 if (PL_laststype != OP_LSTAT)
1351 Perl_croak(aTHX_ "%s", no_prev_lstat);
1352 return PL_laststatval;
1354 PL_laststatval = -1;
1355 if (ckWARN(WARN_IO)) {
1356 /* diag_listed_as: Use of -l on filehandle%s */
1357 Perl_warner(aTHX_ packWARN(WARN_IO),
1358 "Use of -l on filehandle %"HEKf,
1359 HEKfARG(GvENAME_HEK(cGVOP_gv)));
1363 if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1365 if (PL_laststype != OP_LSTAT)
1366 Perl_croak(aTHX_ "%s", no_prev_lstat);
1367 return PL_laststatval;
1370 PL_laststype = OP_LSTAT;
1372 if ( ( (SvROK(sv) && ( isGV_with_GP(SvRV(sv))
1373 || (isio = SvTYPE(SvRV(sv)) == SVt_PVIO) )
1377 && ckWARN(WARN_IO)) {
1379 /* diag_listed_as: Use of -l on filehandle%s */
1380 Perl_warner(aTHX_ packWARN(WARN_IO),
1381 "Use of -l on filehandle");
1383 /* diag_listed_as: Use of -l on filehandle%s */
1384 Perl_warner(aTHX_ packWARN(WARN_IO),
1385 "Use of -l on filehandle %"HEKf,
1386 GvENAME_HEK((const GV *)
1387 (SvROK(sv) ? SvRV(sv) : sv)));
1389 file = SvPV_flags_const_nolen(sv, flags);
1390 sv_setpv(PL_statname,file);
1391 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
1392 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(file, '\n'))
1393 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1394 return PL_laststatval;
1398 S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1400 const int e = errno;
1401 PERL_ARGS_ASSERT_EXEC_FAILED;
1402 if (ckWARN(WARN_EXEC))
1403 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1406 PerlLIO_write(fd, (void*)&e, sizeof(int));
1412 Perl_do_aexec5(pTHX_ SV *really, SV **mark, SV **sp,
1413 int fd, int do_report)
1416 PERL_ARGS_ASSERT_DO_AEXEC5;
1417 #if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
1418 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1422 const char *tmps = NULL;
1423 Newx(PL_Argv, sp - mark + 1, const char*);
1426 while (++mark <= sp) {
1428 *a++ = SvPV_nolen_const(*mark);
1434 tmps = SvPV_nolen_const(really);
1435 if ((!really && *PL_Argv[0] != '/') ||
1436 (really && *tmps != '/')) /* will execvp use PATH? */
1437 TAINT_ENV(); /* testing IFS here is overkill, probably */
1439 if (really && *tmps)
1440 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1442 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1444 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
1452 Perl_do_execfree(pTHX)
1461 #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
1464 Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
1471 /* Make a copy so we can change it */
1472 const Size_t cmdlen = strlen(incmd) + 1;
1474 PERL_ARGS_ASSERT_DO_EXEC3;
1476 Newx(buf, cmdlen, char);
1478 memcpy(cmd, incmd, cmdlen);
1480 while (*cmd && isSPACE(*cmd))
1483 /* save an extra exec if possible */
1487 char flags[PERL_FLAGS_MAX];
1488 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1489 strnEQ(cmd+PL_cshlen," -c",3)) {
1490 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
1491 s = cmd+PL_cshlen+3;
1494 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
1499 char * const ncmd = s;
1505 if (s[-1] == '\'') {
1508 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
1511 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
1520 /* see if there are shell metacharacters in it */
1522 if (*cmd == '.' && isSPACE(cmd[1]))
1525 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1529 while (isWORDCHAR(*s))
1530 s++; /* catch VAR=val gizmo */
1534 for (s = cmd; *s; s++) {
1535 if (*s != ' ' && !isALPHA(*s) &&
1536 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1537 if (*s == '\n' && !s[1]) {
1541 /* handle the 2>&1 construct at the end */
1542 if (*s == '>' && s[1] == '&' && s[2] == '1'
1543 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1544 && (!s[3] || isSPACE(s[3])))
1546 const char *t = s + 3;
1548 while (*t && isSPACE(*t))
1550 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1557 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
1559 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
1565 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*);
1566 PL_Cmd = savepvn(cmd, s-cmd);
1568 for (s = PL_Cmd; *s;) {
1573 while (*s && !isSPACE(*s))
1581 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1583 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1587 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
1594 #endif /* OS2 || WIN32 */
1597 #include <starlet.h> /* for sys$delprc */
1601 Perl_apply(pTHX_ I32 type, SV **mark, SV **sp)
1606 const char *const what = PL_op_name[type];
1609 SV ** const oldmark = mark;
1610 bool killgp = FALSE;
1612 PERL_ARGS_ASSERT_APPLY;
1614 PERL_UNUSED_VAR(what); /* may not be used depending on compile options */
1616 /* Doing this ahead of the switch statement preserves the old behaviour,
1617 where attempting to use kill as a taint test test would fail on
1618 platforms where kill was not defined. */
1620 if (type == OP_KILL)
1621 Perl_die(aTHX_ PL_no_func, what);
1624 if (type == OP_CHOWN)
1625 Perl_die(aTHX_ PL_no_func, what);
1629 #define APPLY_TAINT_PROPER() \
1631 if (TAINT_get) { TAINT_PROPER(what); } \
1634 /* This is a first heuristic; it doesn't catch tainting magic. */
1636 while (++mark <= sp) {
1637 if (SvTAINTED(*mark)) {
1646 APPLY_TAINT_PROPER();
1649 APPLY_TAINT_PROPER();
1651 while (++mark <= sp) {
1653 if ((gv = MAYBE_DEREF_GV(*mark))) {
1654 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1656 APPLY_TAINT_PROPER();
1657 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1660 Perl_die(aTHX_ PL_no_func, "fchmod");
1668 const char *name = SvPV_nomg_const(*mark, len);
1669 APPLY_TAINT_PROPER();
1670 if (!IS_SAFE_PATHNAME(name, len, "chmod") ||
1671 PerlLIO_chmod(name, val)) {
1680 APPLY_TAINT_PROPER();
1681 if (sp - mark > 2) {
1683 val = SvIVx(*++mark);
1684 val2 = SvIVx(*++mark);
1685 APPLY_TAINT_PROPER();
1687 while (++mark <= sp) {
1689 if ((gv = MAYBE_DEREF_GV(*mark))) {
1690 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1692 APPLY_TAINT_PROPER();
1693 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1696 Perl_die(aTHX_ PL_no_func, "fchown");
1704 const char *name = SvPV_nomg_const(*mark, len);
1705 APPLY_TAINT_PROPER();
1706 if (!IS_SAFE_PATHNAME(name, len, "chown") ||
1707 PerlLIO_chown(name, val, val2)) {
1716 XXX Should we make lchown() directly available from perl?
1717 For now, we'll let Configure test for HAS_LCHOWN, but do
1718 nothing in the core.
1723 APPLY_TAINT_PROPER();
1726 s = SvPVx_const(*++mark, len);
1727 if (*s == '-' && isALPHA(s[1]))
1734 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
1738 if ((val = whichsig_pvn(s, len)) < 0)
1739 Perl_croak(aTHX_ "Unrecognized signal name \"%"SVf"\"", SVfARG(*mark));
1750 APPLY_TAINT_PROPER();
1753 /* kill() doesn't do process groups (job trees?) under VMS */
1754 if (val == SIGKILL) {
1755 /* Use native sys$delprc() to insure that target process is
1756 * deleted; supervisor-mode images don't pay attention to
1757 * CRTL's emulation of Unix-style signals and kill()
1759 while (++mark <= sp) {
1761 unsigned long int __vmssts;
1763 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1764 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1765 proc = SvIV_nomg(*mark);
1766 APPLY_TAINT_PROPER();
1767 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1771 case SS$_NOSUCHNODE:
1772 SETERRNO(ESRCH,__vmssts);
1775 SETERRNO(EPERM,__vmssts);
1778 SETERRNO(EVMSERR,__vmssts);
1786 while (++mark <= sp) {
1789 if (!(SvNIOK(*mark) || looks_like_number(*mark)))
1790 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1791 proc = SvIV_nomg(*mark);
1796 APPLY_TAINT_PROPER();
1797 if (PerlProc_kill(proc, val))
1804 APPLY_TAINT_PROPER();
1806 while (++mark <= sp) {
1807 s = SvPV_const(*mark, len);
1808 APPLY_TAINT_PROPER();
1809 if (!IS_SAFE_PATHNAME(s, len, "unlink")) {
1812 else if (PerlProc_geteuid() || PL_unsafe) {
1816 else { /* don't let root wipe out directories without -U */
1817 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1826 #if defined(HAS_UTIME) || defined(HAS_FUTIMES)
1828 APPLY_TAINT_PROPER();
1829 if (sp - mark > 2) {
1830 #if defined(HAS_FUTIMES)
1831 struct timeval utbuf[2];
1832 void *utbufp = utbuf;
1833 #elif defined(I_UTIME) || defined(VMS)
1834 struct utimbuf utbuf;
1835 struct utimbuf *utbufp = &utbuf;
1841 void *utbufp = &utbuf;
1844 SV* const accessed = *++mark;
1845 SV* const modified = *++mark;
1847 /* Be like C, and if both times are undefined, let the C
1848 * library figure out what to do. This usually means
1849 * "current time". */
1851 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
1854 Zero(&utbuf, sizeof utbuf, char);
1856 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
1857 utbuf[0].tv_usec = 0;
1858 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
1859 utbuf[1].tv_usec = 0;
1860 #elif defined(BIG_TIME)
1861 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
1862 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
1864 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
1865 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
1868 APPLY_TAINT_PROPER();
1870 while (++mark <= sp) {
1872 if ((gv = MAYBE_DEREF_GV(*mark))) {
1873 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1875 APPLY_TAINT_PROPER();
1876 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))),
1877 (struct timeval *) utbufp))
1880 Perl_die(aTHX_ PL_no_func, "futimes");
1888 const char * const name = SvPV_nomg_const(*mark, len);
1889 APPLY_TAINT_PROPER();
1890 if (!IS_SAFE_PATHNAME(name, len, "utime")) {
1895 if (utimes(name, (struct timeval *)utbufp))
1897 if (PerlLIO_utime(name, utbufp))
1911 #undef APPLY_TAINT_PROPER
1914 /* Do the permissions allow some operation? Assumes statcache already set. */
1915 #ifndef VMS /* VMS' cando is in vms.c */
1917 Perl_cando(pTHX_ Mode_t mode, bool effective, const Stat_t *statbufp)
1918 /* effective is a flag, true for EUID, or for checking if the effective gid
1919 * is in the list of groups returned from getgroups().
1924 PERL_ARGS_ASSERT_CANDO;
1927 /* [Comments and code from Len Reed]
1928 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1929 * to write-protected files. The execute permission bit is set
1930 * by the Microsoft C library stat() function for the following:
1935 * All files and directories are readable.
1936 * Directories and special files, e.g. "CON", cannot be
1938 * [Comment by Tom Dinger -- a directory can have the write-protect
1939 * bit set in the file system, but DOS permits changes to
1940 * the directory anyway. In addition, all bets are off
1941 * here for networked software, such as Novell and
1945 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1946 * too so it will actually look into the files for magic numbers
1948 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1950 #else /* ! DOSISH */
1952 if (ingroup(544,effective)) { /* member of Administrators */
1954 if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 0) { /* root is special */
1956 if (mode == S_IXUSR) {
1957 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1961 return TRUE; /* root reads and writes anything */
1964 if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) {
1965 if (statbufp->st_mode & mode)
1966 return TRUE; /* ok as "user" */
1968 else if (ingroup(statbufp->st_gid,effective)) {
1969 if (statbufp->st_mode & mode >> 3)
1970 return TRUE; /* ok as "group" */
1972 else if (statbufp->st_mode & mode >> 6)
1973 return TRUE; /* ok as "other" */
1975 #endif /* ! DOSISH */
1980 S_ingroup(pTHX_ Gid_t testgid, bool effective)
1983 if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid()))
1985 #ifdef HAS_GETGROUPS
1987 Groups_t *gary = NULL;
1991 anum = getgroups(0, gary);
1992 Newx(gary, anum, Groups_t);
1993 anum = getgroups(anum, gary);
1995 if (gary[anum] == testgid) {
2008 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
2011 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
2014 const key_t key = (key_t)SvNVx(*++mark);
2015 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
2016 const I32 flags = SvIVx(*++mark);
2018 PERL_ARGS_ASSERT_DO_IPCGET;
2019 PERL_UNUSED_ARG(sp);
2026 return msgget(key, flags);
2030 return semget(key, (int) SvIV(nsv), flags);
2034 return shmget(key, (size_t) SvUV(nsv), flags);
2036 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2038 /* diag_listed_as: msg%s not implemented */
2039 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2042 return -1; /* should never happen */
2046 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
2051 const I32 id = SvIVx(*++mark);
2053 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
2055 const I32 cmd = SvIVx(*++mark);
2056 SV * const astr = *++mark;
2057 STRLEN infosize = 0;
2058 I32 getinfo = (cmd == IPC_STAT);
2060 PERL_ARGS_ASSERT_DO_IPCCTL;
2061 PERL_UNUSED_ARG(sp);
2067 if (cmd == IPC_STAT || cmd == IPC_SET)
2068 infosize = sizeof(struct msqid_ds);
2073 if (cmd == IPC_STAT || cmd == IPC_SET)
2074 infosize = sizeof(struct shmid_ds);
2080 if (cmd == IPC_STAT || cmd == IPC_SET)
2081 infosize = sizeof(struct semid_ds);
2082 else if (cmd == GETALL || cmd == SETALL)
2084 struct semid_ds semds;
2086 #ifdef EXTRA_F_IN_SEMUN_BUF
2087 semun.buff = &semds;
2091 getinfo = (cmd == GETALL);
2092 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2094 infosize = semds.sem_nsems * sizeof(short);
2095 /* "short" is technically wrong but much more portable
2096 than guessing about u_?short(_t)? */
2099 /* diag_listed_as: sem%s not implemented */
2100 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2104 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2106 /* diag_listed_as: shm%s not implemented */
2107 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2115 SvPV_force_nolen(astr);
2116 a = SvGROW(astr, infosize+1);
2121 a = SvPV(astr, len);
2122 if (len != infosize)
2123 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2131 const IV i = SvIV(astr);
2132 a = INT2PTR(char *,i); /* ouch */
2139 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2145 union semun unsemds;
2147 #ifdef EXTRA_F_IN_SEMUN_BUF
2148 unsemds.buff = (struct semid_ds *)a;
2150 unsemds.buf = (struct semid_ds *)a;
2152 ret = Semctl(id, n, cmd, unsemds);
2154 /* diag_listed_as: sem%s not implemented */
2155 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2162 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2166 if (getinfo && ret >= 0) {
2167 SvCUR_set(astr, infosize);
2168 *SvEND(astr) = '\0';
2175 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2180 const I32 id = SvIVx(*++mark);
2181 SV * const mstr = *++mark;
2182 const I32 flags = SvIVx(*++mark);
2183 const char * const mbuf = SvPV_const(mstr, len);
2184 const I32 msize = len - sizeof(long);
2186 PERL_ARGS_ASSERT_DO_MSGSND;
2187 PERL_UNUSED_ARG(sp);
2190 Perl_croak(aTHX_ "Arg too short for msgsnd");
2192 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2194 PERL_UNUSED_ARG(sp);
2195 PERL_UNUSED_ARG(mark);
2196 /* diag_listed_as: msg%s not implemented */
2197 Perl_croak(aTHX_ "msgsnd not implemented");
2203 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2209 I32 msize, flags, ret;
2210 const I32 id = SvIVx(*++mark);
2211 SV * const mstr = *++mark;
2213 PERL_ARGS_ASSERT_DO_MSGRCV;
2214 PERL_UNUSED_ARG(sp);
2216 /* suppress warning when reading into undef var --jhi */
2218 sv_setpvs(mstr, "");
2219 msize = SvIVx(*++mark);
2220 mtype = (long)SvIVx(*++mark);
2221 flags = SvIVx(*++mark);
2222 SvPV_force_nolen(mstr);
2223 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2226 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2228 SvCUR_set(mstr, sizeof(long)+ret);
2229 *SvEND(mstr) = '\0';
2230 #ifndef INCOMPLETE_TAINTS
2231 /* who knows who has been playing with this message? */
2237 PERL_UNUSED_ARG(sp);
2238 PERL_UNUSED_ARG(mark);
2239 /* diag_listed_as: msg%s not implemented */
2240 Perl_croak(aTHX_ "msgrcv not implemented");
2246 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2251 const I32 id = SvIVx(*++mark);
2252 SV * const opstr = *++mark;
2253 const char * const opbuf = SvPV_const(opstr, opsize);
2255 PERL_ARGS_ASSERT_DO_SEMOP;
2256 PERL_UNUSED_ARG(sp);
2258 if (opsize < 3 * SHORTSIZE
2259 || (opsize % (3 * SHORTSIZE))) {
2260 SETERRNO(EINVAL,LIB_INVARG);
2264 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2266 const int nsops = opsize / (3 * sizeof (short));
2268 short * const ops = (short *) opbuf;
2270 struct sembuf *temps, *t;
2273 Newx (temps, nsops, struct sembuf);
2281 result = semop(id, temps, nsops);
2295 /* diag_listed_as: sem%s not implemented */
2296 Perl_croak(aTHX_ "semop not implemented");
2301 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2306 struct shmid_ds shmds;
2307 const I32 id = SvIVx(*++mark);
2308 SV * const mstr = *++mark;
2309 const I32 mpos = SvIVx(*++mark);
2310 const I32 msize = SvIVx(*++mark);
2312 PERL_ARGS_ASSERT_DO_SHMIO;
2313 PERL_UNUSED_ARG(sp);
2316 if (shmctl(id, IPC_STAT, &shmds) == -1)
2318 if (mpos < 0 || msize < 0
2319 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
2320 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2323 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2324 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2326 if (optype == OP_SHMREAD) {
2328 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2330 SvUPGRADE(mstr, SVt_PV);
2332 sv_setpvs(mstr, "");
2334 mbuf = SvGROW(mstr, (STRLEN)msize+1);
2336 Copy(shm + mpos, mbuf, msize, char);
2337 SvCUR_set(mstr, msize);
2338 *SvEND(mstr) = '\0';
2340 #ifndef INCOMPLETE_TAINTS
2341 /* who knows who has been playing with this shared memory? */
2348 const char *mbuf = SvPV_const(mstr, len);
2349 const I32 n = ((I32)len > msize) ? msize : (I32)len;
2350 Copy(mbuf, shm + mpos, n, char);
2352 memzero(shm + mpos + n, msize - n);
2356 /* diag_listed_as: shm%s not implemented */
2357 Perl_croak(aTHX_ "shm I/O not implemented");
2362 #endif /* SYSV IPC */
2367 =for apidoc start_glob
2369 Function called by C<do_readline> to spawn a glob (or do the glob inside
2370 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2371 this glob starter is only used by miniperl during the build process.
2372 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2378 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2381 SV * const tmpcmd = newSV(0);
2384 const char *s = SvPV(tmpglob, len);
2386 PERL_ARGS_ASSERT_START_GLOB;
2388 if (!IS_SAFE_SYSCALL(s, len, "pattern", "glob"))
2393 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2394 /* since spawning off a process is a real performance hit */
2401 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
2406 sv_setpv(tmpcmd, "for a in ");
2407 sv_catsv(tmpcmd, tmpglob);
2408 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2411 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2412 sv_catsv(tmpcmd, tmpglob);
2414 sv_setpv(tmpcmd, "perlglob ");
2415 sv_catsv(tmpcmd, tmpglob);
2416 sv_catpv(tmpcmd, " |");
2421 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2422 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2423 sv_catsv(tmpcmd, tmpglob);
2424 sv_catpv(tmpcmd, "' 2>/dev/null |");
2426 sv_setpv(tmpcmd, "echo ");
2427 sv_catsv(tmpcmd, tmpglob);
2429 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2431 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2434 #endif /* !DOSISH */
2436 GV * const envgv = gv_fetchpvs("ENV", 0, SVt_PVHV);
2437 SV ** const home = hv_fetchs(GvHV(envgv), "HOME", 0);
2438 SV ** const path = hv_fetchs(GvHV(envgv), "PATH", 0);
2439 if (home && *home) SvGETMAGIC(*home);
2440 if (path && *path) SvGETMAGIC(*path);
2441 save_hash(gv_fetchpvs("ENV", 0, SVt_PVHV));
2442 if (home && *home) SvSETMAGIC(*home);
2443 if (path && *path) SvSETMAGIC(*path);
2445 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2446 FALSE, O_RDONLY, 0, NULL);
2451 if (!fp && ckWARN(WARN_GLOB)) {
2452 Perl_warner(aTHX_ packWARN(WARN_GLOB), "glob failed (can't start child: %s)",
2461 * c-indentation-style: bsd
2463 * indent-tabs-mode: nil
2466 * ex: set ts=8 sts=4 sw=4 et: