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, register const char *oname, I32 len, int as_raw,
65 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
69 register 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");
160 It might be (in OS/390 and Mac OS Classic it is)
166 This means that simple & with O_RDWR would look
167 like O_RDONLY is present. Therefore we have to
170 if ((ismodifying = (rawmode & modifyingmode))) {
171 if ((ismodifying & O_WRONLY) == O_WRONLY ||
172 (ismodifying & O_RDWR) == O_RDWR ||
173 (ismodifying & (O_CREAT|appendtrunc)))
174 TAINT_PROPER("sysopen");
176 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
178 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
179 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
182 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
184 namesv = newSVpvn_flags(oname, len, SVs_TEMP);
188 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
191 /* Regular (non-sys) open */
197 type = savepvn(oname, len);
201 /* Lose leading and trailing white space */
202 while (isSPACE(*type))
204 while (tend > type && isSPACE(tend[-1]))
208 /* New style explicit name, type is just mode and layer info */
210 if (SvROK(*svp) && !strchr(oname,'&')) {
212 Perl_warner(aTHX_ packWARN(WARN_IO),
213 "Can't open a reference");
214 SETERRNO(EINVAL, LIB_INVARG);
217 #endif /* USE_STDIO */
218 name = (SvOK(*svp) || SvGMAGICAL(*svp)) ?
219 savesvpv (*svp) : savepvs ("");
227 if ((*type == IoTYPE_RDWR) && /* scary */
228 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
229 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
230 TAINT_PROPER("open");
235 if (*type == IoTYPE_PIPE) {
237 if (type[1] != IoTYPE_STD) {
239 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
245 } while (isSPACE(*type));
251 /* command is missing 19990114 */
252 if (ckWARN(WARN_PIPE))
253 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
257 if (!(*name == '-' && name[1] == '\0') || num_svs)
259 TAINT_PROPER("piped open");
260 if (!num_svs && name[len-1] == '|') {
262 if (ckWARN(WARN_PIPE))
263 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
272 fp = PerlProc_popen_list(mode, num_svs, svp);
275 fp = PerlProc_popen(name,mode);
279 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
285 else if (*type == IoTYPE_WRONLY) {
286 TAINT_PROPER("open");
288 if (*type == IoTYPE_WRONLY) {
289 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
290 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
304 dodup = PERLIO_DUP_FD;
310 if (!num_svs && !*type && supplied_fp) {
311 /* "<+&" etc. is used by typemaps */
315 PerlIO *that_fp = NULL;
317 /* diag_listed_as: More than one argument to '%s' open */
318 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
320 while (isSPACE(*type))
322 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
326 else if (isDIGIT(*type)) {
332 thatio = sv_2io(*svp);
335 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
337 thatio = GvIO(thatgv);
341 SETERRNO(EINVAL,SS_IVCHAN);
345 if ((that_fp = IoIFP(thatio))) {
346 /* Flush stdio buffer before dup. --mjd
347 * Unfortunately SEEK_CURing 0 seems to
348 * be optimized away on most platforms;
349 * only Solaris and Linux seem to flush
352 /* sfio fails to clear error on next
353 sfwrite, contrary to documentation.
355 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
356 PerlIO_clearerr(that_fp);
358 /* On the other hand, do all platforms
359 * take gracefully to flushing a read-only
360 * filehandle? Perhaps we should do
361 * fsetpos(src)+fgetpos(dst)? --nik */
362 PerlIO_flush(that_fp);
363 fd = PerlIO_fileno(that_fp);
364 /* When dup()ing STDIN, STDOUT or STDERR
365 * explicitly set appropriate access mode */
366 if (that_fp == PerlIO_stdout()
367 || that_fp == PerlIO_stderr())
368 IoTYPE(io) = IoTYPE_WRONLY;
369 else if (that_fp == PerlIO_stdin())
370 IoTYPE(io) = IoTYPE_RDONLY;
371 /* When dup()ing a socket, say result is
373 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
374 IoTYPE(io) = IoTYPE_SOCKET;
382 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
386 fd = PerlLIO_dup(fd);
389 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
390 if (dodup && fd >= 0)
397 while (isSPACE(*type))
399 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
401 fp = PerlIO_stdout();
402 IoTYPE(io) = IoTYPE_STD;
404 /* diag_listed_as: More than one argument to '%s' open */
405 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
410 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
415 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
418 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
419 goto unknown_open_mode;
420 } /* IoTYPE_WRONLY */
421 else if (*type == IoTYPE_RDONLY) {
424 } while (isSPACE(*type));
433 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
436 IoTYPE(io) = IoTYPE_STD;
438 /* diag_listed_as: More than one argument to '%s' open */
439 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
444 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
449 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
451 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
452 goto unknown_open_mode;
453 } /* IoTYPE_RDONLY */
454 else if ((num_svs && /* '-|...' or '...|' */
455 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
456 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
458 type += 2; /* skip over '-|' */
462 while (tend > type && isSPACE(tend[-1]))
464 for (; isSPACE(*type); type++)
470 /* command is missing 19990114 */
471 if (ckWARN(WARN_PIPE))
472 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
476 if (!(*name == '-' && name[1] == '\0') || num_svs)
478 TAINT_PROPER("piped open");
487 fp = PerlProc_popen_list(mode,num_svs,svp);
490 fp = PerlProc_popen(name,mode);
492 IoTYPE(io) = IoTYPE_PIPE;
494 while (isSPACE(*type))
497 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
503 else { /* layer(Args) */
505 goto unknown_open_mode;
507 IoTYPE(io) = IoTYPE_RDONLY;
508 for (; isSPACE(*name); name++)
517 if (*name == '-' && name[1] == '\0') {
519 IoTYPE(io) = IoTYPE_STD;
523 namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
528 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
533 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
534 && strchr(oname, '\n')
537 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
541 if (ckWARN(WARN_IO)) {
542 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
543 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
544 Perl_warner(aTHX_ packWARN(WARN_IO),
545 "Filehandle STD%s reopened as %"HEKf
547 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
548 HEKfARG(GvENAME_HEK(gv)));
550 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
551 Perl_warner(aTHX_ packWARN(WARN_IO),
552 "Filehandle STDIN reopened as %"HEKf" only for output",
553 HEKfARG(GvENAME_HEK(gv))
558 fd = PerlIO_fileno(fp);
559 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
560 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
561 * type probe for socket-ness.
563 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
564 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
565 /* If PerlIO claims to have fd we had better be able to fstat() it. */
566 (void) PerlIO_close(fp);
570 if (S_ISSOCK(PL_statbuf.st_mode))
571 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
575 !(PL_statbuf.st_mode & S_IFMT)
579 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
580 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
581 ) { /* on OS's that return 0 on fstat()ed pipe */
583 Sock_size_t buflen = sizeof tmpbuf;
584 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
585 || errno != ENOTSOCK)
586 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
587 /* but some return 0 for streams too, sigh */
589 #endif /* HAS_SOCKET */
590 #endif /* !PERL_MICRO */
594 * If this is a standard handle we discard all the layer stuff
595 * and just dup the fd into whatever was on the handle before !
598 if (saveifp) { /* must use old fp? */
599 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
600 then dup the new fileno down
603 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
604 if (saveofp != saveifp) { /* was a socket? */
605 PerlIO_close(saveofp);
609 /* Still a small can-of-worms here if (say) PerlIO::scalar
610 is assigned to (say) STDOUT - for now let dup2() fail
611 and provide the error
613 if (PerlLIO_dup2(fd, savefd) < 0) {
614 (void)PerlIO_close(fp);
618 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
619 char newname[FILENAME_MAX+1];
620 if (PerlIO_getname(fp, newname)) {
621 if (fd == PerlIO_fileno(PerlIO_stdout()))
622 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
623 if (fd == PerlIO_fileno(PerlIO_stderr()))
624 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
630 /* PL_fdpid isn't used on Windows, so avoid this useless work.
631 * XXX Probably the same for a lot of other places. */
636 sv = *av_fetch(PL_fdpid,fd,TRUE);
637 SvUPGRADE(sv, SVt_IV);
640 sv = *av_fetch(PL_fdpid,savefd,TRUE);
641 SvUPGRADE(sv, SVt_IV);
647 /* need to close fp without closing underlying fd */
648 int ofd = PerlIO_fileno(fp);
649 int dupfd = PerlLIO_dup(ofd);
650 #if defined(HAS_FCNTL) && defined(F_SETFD)
651 /* Assume if we have F_SETFD we have F_GETFD */
652 int coe = fcntl(ofd,F_GETFD);
655 PerlLIO_dup2(dupfd,ofd);
656 #if defined(HAS_FCNTL) && defined(F_SETFD)
657 /* The dup trick has lost close-on-exec on ofd */
658 fcntl(ofd,F_SETFD, coe);
660 PerlLIO_close(dupfd);
667 fd = PerlIO_fileno(fp);
669 #if defined(HAS_FCNTL) && defined(F_SETFD)
672 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
678 IoFLAGS(io) &= ~IOf_NOLINE;
680 if (IoTYPE(io) == IoTYPE_SOCKET
681 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
683 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
686 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
700 IoTYPE(io) = savetype;
705 Perl_nextargv(pTHX_ register GV *gv)
709 #ifndef FLEXFILENAMES
715 IO * const io = GvIOp(gv);
717 PERL_ARGS_ASSERT_NEXTARGV;
720 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
721 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
722 IoFLAGS(io) &= ~IOf_START;
725 Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
726 SvREFCNT_inc_simple_NN(PL_defoutgv));
729 if (PL_filemode & (S_ISUID|S_ISGID)) {
730 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
733 (void)fchmod(PL_lastfd,PL_filemode);
735 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
742 while (av_len(GvAV(gv)) >= 0) {
744 sv = av_shift(GvAV(gv));
746 sv_setsv(GvSVn(gv),sv);
747 SvSETMAGIC(GvSV(gv));
748 PL_oldname = SvPVx(GvSV(gv), oldlen);
749 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) {
751 TAINT_PROPER("inplace open");
752 if (oldlen == 1 && *PL_oldname == '-') {
753 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
755 return IoIFP(GvIOp(gv));
757 #ifndef FLEXFILENAMES
758 filedev = PL_statbuf.st_dev;
759 fileino = PL_statbuf.st_ino;
761 PL_filemode = PL_statbuf.st_mode;
762 fileuid = PL_statbuf.st_uid;
763 filegid = PL_statbuf.st_gid;
764 if (!S_ISREG(PL_filemode)) {
765 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
766 "Can't do inplace edit: %s is not a regular file",
771 if (*PL_inplace && strNE(PL_inplace, "*")) {
772 const char *star = strchr(PL_inplace, '*');
774 const char *begin = PL_inplace;
777 sv_catpvn(sv, begin, star - begin);
778 sv_catpvn(sv, PL_oldname, oldlen);
780 } while ((star = strchr(begin, '*')));
785 sv_catpv(sv,PL_inplace);
787 #ifndef FLEXFILENAMES
788 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
789 && PL_statbuf.st_dev == filedev
790 && PL_statbuf.st_ino == fileino)
792 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
796 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
797 "Can't do inplace edit: %"SVf" would not be unique",
804 #if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
805 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
806 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
807 "Can't rename %s to %"SVf": %s, skipping file",
808 PL_oldname, SVfARG(sv), Strerror(errno));
814 (void)PerlLIO_unlink(SvPVX_const(sv));
815 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
816 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),TRUE,O_RDONLY,0,NULL);
819 (void)UNLINK(SvPVX_const(sv));
820 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
821 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
822 "Can't rename %s to %"SVf": %s, skipping file",
823 PL_oldname, SVfARG(sv), Strerror(errno) );
827 (void)UNLINK(PL_oldname);
831 #if !defined(DOSISH) && !defined(AMIGAOS)
832 # ifndef VMS /* Don't delete; use automatic file versioning */
833 if (UNLINK(PL_oldname) < 0) {
834 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
835 "Can't remove %s: %s, skipping file",
836 PL_oldname, Strerror(errno) );
842 Perl_croak(aTHX_ "Can't do inplace edit without backup");
846 sv_setpvn(sv,PL_oldname,oldlen);
847 SETERRNO(0,0); /* in case sprintf set errno */
848 if (!Perl_do_openn(aTHX_ PL_argvoutgv, (char*)SvPVX_const(sv),
851 O_WRONLY|O_CREAT|O_TRUNC,0,
853 O_WRONLY|O_CREAT|OPEN_EXCL,0600,
856 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
857 PL_oldname, Strerror(errno) );
861 setdefout(PL_argvoutgv);
862 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
863 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
865 (void)fchmod(PL_lastfd,PL_filemode);
867 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
869 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
871 (void)fchown(PL_lastfd,fileuid,filegid);
874 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
879 return IoIFP(GvIOp(gv));
882 if (ckWARN_d(WARN_INPLACE)) {
883 const int eno = errno;
884 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
885 && !S_ISREG(PL_statbuf.st_mode))
887 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
888 "Can't do inplace edit: %s is not a regular file",
892 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
893 PL_oldname, Strerror(eno));
897 if (io && (IoFLAGS(io) & IOf_ARGV))
898 IoFLAGS(io) |= IOf_START;
900 (void)do_close(PL_argvoutgv,FALSE);
901 if (io && (IoFLAGS(io) & IOf_ARGV)
902 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
904 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
906 SvREFCNT_dec(oldout);
909 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
914 /* explicit renamed to avoid C++ conflict -- kja */
916 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
924 if (!gv || !isGV_with_GP(gv)) {
926 SETERRNO(EBADF,SS_IVCHAN);
930 if (!io) { /* never opened */
933 SETERRNO(EBADF,SS_IVCHAN);
937 retval = io_close(io, not_implicit);
941 IoLINES_LEFT(io) = IoPAGE_LEN(io);
943 IoTYPE(io) = IoTYPE_CLOSED;
948 Perl_io_close(pTHX_ IO *io, bool not_implicit)
953 PERL_ARGS_ASSERT_IO_CLOSE;
956 if (IoTYPE(io) == IoTYPE_PIPE) {
957 const int status = PerlProc_pclose(IoIFP(io));
959 STATUS_NATIVE_CHILD_SET(status);
960 retval = (STATUS_UNIX == 0);
963 retval = (status != -1);
966 else if (IoTYPE(io) == IoTYPE_STD)
969 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
970 const bool prev_err = PerlIO_error(IoOFP(io));
971 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
972 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
975 const bool prev_err = PerlIO_error(IoIFP(io));
976 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
979 IoOFP(io) = IoIFP(io) = NULL;
981 else if (not_implicit) {
982 SETERRNO(EBADF,SS_IVCHAN);
989 Perl_do_eof(pTHX_ GV *gv)
992 register IO * const io = GvIO(gv);
994 PERL_ARGS_ASSERT_DO_EOF;
998 else if (IoTYPE(io) == IoTYPE_WRONLY)
999 report_wrongway_fh(gv, '>');
1002 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1003 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1004 return FALSE; /* this is the most usual case */
1008 /* getc and ungetc can stomp on errno */
1010 const int ch = PerlIO_getc(IoIFP(io));
1012 (void)PerlIO_ungetc(IoIFP(io),ch);
1019 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1020 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1021 PerlIO_set_cnt(IoIFP(io),-1);
1023 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1024 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
1028 return TRUE; /* normal fp, definitely end of file */
1034 Perl_do_tell(pTHX_ GV *gv)
1037 IO *const io = GvIO(gv);
1038 register PerlIO *fp;
1040 PERL_ARGS_ASSERT_DO_TELL;
1042 if (io && (fp = IoIFP(io))) {
1043 #ifdef ULTRIX_STDIO_BOTCH
1045 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1047 return PerlIO_tell(fp);
1050 SETERRNO(EBADF,RMS_IFI);
1055 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1058 IO *const io = GvIO(gv);
1059 register PerlIO *fp;
1061 if (io && (fp = IoIFP(io))) {
1062 #ifdef ULTRIX_STDIO_BOTCH
1064 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1066 return PerlIO_seek(fp, pos, whence) >= 0;
1069 SETERRNO(EBADF,RMS_IFI);
1074 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1077 IO *const io = GvIO(gv);
1078 register PerlIO *fp;
1080 PERL_ARGS_ASSERT_DO_SYSSEEK;
1082 if (io && (fp = IoIFP(io)))
1083 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1085 SETERRNO(EBADF,RMS_IFI);
1090 Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
1092 int mode = O_BINARY;
1098 if (s[2] == 'a' && s[3] == 'w'
1099 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1108 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1109 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1118 goto fail_discipline;
1121 else if (isSPACE(*s)) {
1128 end = strchr(s+1, ':');
1131 #ifndef PERLIO_LAYERS
1132 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1143 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1145 my_chsize(int fd, Off_t length)
1148 /* code courtesy of William Kucharski */
1153 if (PerlLIO_fstat(fd, &filebuf) < 0)
1156 if (filebuf.st_size < length) {
1158 /* extend file length */
1160 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1163 /* write a "0" byte */
1165 if ((PerlLIO_write(fd, "", 1)) != 1)
1169 /* truncate length */
1173 fl.l_start = length;
1174 fl.l_type = F_WRLCK; /* write lock on file space */
1177 * This relies on the UNDOCUMENTED F_FREESP argument to
1178 * fcntl(2), which truncates the file so that it ends at the
1179 * position indicated by fl.l_start.
1181 * Will minor miracles never cease?
1184 if (fcntl(fd, F_FREESP, &fl) < 0)
1190 Perl_croak_nocontext("truncate not implemented");
1191 #endif /* F_FREESP */
1194 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1197 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1201 PERL_ARGS_ASSERT_DO_PRINT;
1203 /* assuming fp is checked earlier */
1206 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
1207 assert(!SvGMAGICAL(sv));
1209 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1211 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1212 return !PerlIO_error(fp);
1216 /* Do this first to trigger any overloading. */
1217 const char *tmps = SvPV_const(sv, len);
1221 if (PerlIO_isutf8(fp)) {
1223 /* We don't modify the original scalar. */
1224 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1225 tmps = (char *) tmpbuf;
1227 else if (ckWARN_d(WARN_UTF8)) {
1228 (void) check_utf8_print((const U8*) tmps, len);
1231 else if (DO_UTF8(sv)) {
1232 STRLEN tmplen = len;
1234 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
1237 tmps = (char *) tmpbuf;
1241 assert((char *)result == tmps);
1242 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
1243 "Wide character in %s",
1244 PL_op ? OP_DESC(PL_op) : "print"
1246 /* Could also check that isn't one of the things to avoid
1247 * in utf8 by using check_utf8_print(), but not doing so,
1248 * since the stream isn't a UTF8 stream */
1251 /* To detect whether the process is about to overstep its
1252 * filesize limit we would need getrlimit(). We could then
1253 * also transparently raise the limit with setrlimit() --
1254 * but only until the system hard limit/the filesystem limit,
1255 * at which we would get EPERM. Note that when using buffered
1256 * io the write failure can be delayed until the flush/close. --jhi */
1257 if (len && (PerlIO_write(fp,tmps,len) == 0))
1260 return happy ? !PerlIO_error(fp) : FALSE;
1265 Perl_my_stat_flags(pTHX_ const U32 flags)
1272 if (PL_op->op_flags & OPf_REF) {
1277 return PL_laststatval;
1280 PL_laststype = OP_STAT;
1282 sv_setpvs(PL_statname, "");
1285 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1286 } else if (IoDIRP(io)) {
1287 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
1290 return (PL_laststatval = -1);
1294 return (PL_laststatval = -1);
1297 else if (PL_op->op_private & OPpFT_STACKED) {
1298 return PL_laststatval;
1301 SV* const sv = POPs;
1305 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
1308 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
1309 io = MUTABLE_IO(SvRV(sv));
1311 goto do_fstat_have_io;
1314 s = SvPV_flags_const(sv, len, flags);
1316 sv_setpvn(PL_statname, s, len);
1317 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1318 PL_laststype = OP_STAT;
1319 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1320 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1321 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1322 return PL_laststatval;
1328 Perl_my_lstat_flags(pTHX_ const U32 flags)
1331 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
1335 if (PL_op->op_flags & OPf_REF) {
1337 if (cGVOP_gv == PL_defgv) {
1338 if (PL_laststype != OP_LSTAT)
1339 Perl_croak(aTHX_ no_prev_lstat);
1340 return PL_laststatval;
1342 if (ckWARN(WARN_IO)) {
1343 Perl_warner(aTHX_ packWARN(WARN_IO),
1344 "Use of -l on filehandle %"HEKf,
1345 HEKfARG(GvENAME_HEK(cGVOP_gv)));
1347 return (PL_laststatval = -1);
1349 else if (PL_op->op_private & OPpFT_STACKED) {
1350 if (PL_laststype != OP_LSTAT)
1351 Perl_croak(aTHX_ no_prev_lstat);
1352 return PL_laststatval;
1355 PL_laststype = OP_LSTAT;
1359 file = SvPV_flags_const_nolen(sv, flags);
1360 sv_setpv(PL_statname,file);
1361 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
1362 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(file, '\n'))
1363 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1364 return PL_laststatval;
1368 S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1370 const int e = errno;
1371 PERL_ARGS_ASSERT_EXEC_FAILED;
1372 if (ckWARN(WARN_EXEC))
1373 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1376 PerlLIO_write(fd, (void*)&e, sizeof(int));
1382 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1383 int fd, int do_report)
1386 PERL_ARGS_ASSERT_DO_AEXEC5;
1387 #if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
1388 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1392 const char *tmps = NULL;
1393 Newx(PL_Argv, sp - mark + 1, const char*);
1396 while (++mark <= sp) {
1398 *a++ = SvPV_nolen_const(*mark);
1404 tmps = SvPV_nolen_const(really);
1405 if ((!really && *PL_Argv[0] != '/') ||
1406 (really && *tmps != '/')) /* will execvp use PATH? */
1407 TAINT_ENV(); /* testing IFS here is overkill, probably */
1409 if (really && *tmps)
1410 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1412 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1414 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
1422 Perl_do_execfree(pTHX)
1431 #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
1434 Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
1437 register const char **a;
1441 /* Make a copy so we can change it */
1442 const Size_t cmdlen = strlen(incmd) + 1;
1444 PERL_ARGS_ASSERT_DO_EXEC3;
1446 Newx(buf, cmdlen, char);
1448 memcpy(cmd, incmd, cmdlen);
1450 while (*cmd && isSPACE(*cmd))
1453 /* save an extra exec if possible */
1457 char flags[PERL_FLAGS_MAX];
1458 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1459 strnEQ(cmd+PL_cshlen," -c",3)) {
1460 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
1461 s = cmd+PL_cshlen+3;
1464 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
1469 char * const ncmd = s;
1475 if (s[-1] == '\'') {
1478 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
1481 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
1490 /* see if there are shell metacharacters in it */
1492 if (*cmd == '.' && isSPACE(cmd[1]))
1495 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1500 s++; /* catch VAR=val gizmo */
1504 for (s = cmd; *s; s++) {
1505 if (*s != ' ' && !isALPHA(*s) &&
1506 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1507 if (*s == '\n' && !s[1]) {
1511 /* handle the 2>&1 construct at the end */
1512 if (*s == '>' && s[1] == '&' && s[2] == '1'
1513 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1514 && (!s[3] || isSPACE(s[3])))
1516 const char *t = s + 3;
1518 while (*t && isSPACE(*t))
1520 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1527 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
1529 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
1535 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*);
1536 PL_Cmd = savepvn(cmd, s-cmd);
1538 for (s = PL_Cmd; *s;) {
1543 while (*s && !isSPACE(*s))
1551 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1553 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1557 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
1564 #endif /* OS2 || WIN32 */
1567 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1571 register I32 tot = 0;
1572 const char *const what = PL_op_name[type];
1575 SV ** const oldmark = mark;
1577 PERL_ARGS_ASSERT_APPLY;
1579 /* Doing this ahead of the switch statement preserves the old behaviour,
1580 where attempting to use kill as a taint test test would fail on
1581 platforms where kill was not defined. */
1583 if (type == OP_KILL)
1584 Perl_die(aTHX_ PL_no_func, what);
1587 if (type == OP_CHOWN)
1588 Perl_die(aTHX_ PL_no_func, what);
1592 #define APPLY_TAINT_PROPER() \
1594 if (PL_tainted) { TAINT_PROPER(what); } \
1597 /* This is a first heuristic; it doesn't catch tainting magic. */
1599 while (++mark <= sp) {
1600 if (SvTAINTED(*mark)) {
1609 APPLY_TAINT_PROPER();
1612 APPLY_TAINT_PROPER();
1614 while (++mark <= sp) {
1616 if ((gv = MAYBE_DEREF_GV(*mark))) {
1617 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1619 APPLY_TAINT_PROPER();
1620 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1623 Perl_die(aTHX_ PL_no_func, "fchmod");
1631 const char *name = SvPV_nomg_const_nolen(*mark);
1632 APPLY_TAINT_PROPER();
1633 if (PerlLIO_chmod(name, val))
1641 APPLY_TAINT_PROPER();
1642 if (sp - mark > 2) {
1644 val = SvIVx(*++mark);
1645 val2 = SvIVx(*++mark);
1646 APPLY_TAINT_PROPER();
1648 while (++mark <= sp) {
1650 if ((gv = MAYBE_DEREF_GV(*mark))) {
1651 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1653 APPLY_TAINT_PROPER();
1654 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1657 Perl_die(aTHX_ PL_no_func, "fchown");
1665 const char *name = SvPV_nomg_const_nolen(*mark);
1666 APPLY_TAINT_PROPER();
1667 if (PerlLIO_chown(name, val, val2))
1675 XXX Should we make lchown() directly available from perl?
1676 For now, we'll let Configure test for HAS_LCHOWN, but do
1677 nothing in the core.
1682 APPLY_TAINT_PROPER();
1685 s = SvPVx_const(*++mark, len);
1687 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
1691 if ((val = whichsig_pvn(s, len)) < 0)
1692 Perl_croak(aTHX_ "Unrecognized signal name \"%"SVf"\"", SVfARG(*mark));
1696 APPLY_TAINT_PROPER();
1699 /* kill() doesn't do process groups (job trees?) under VMS */
1700 if (val < 0) val = -val;
1701 if (val == SIGKILL) {
1702 # include <starlet.h>
1703 /* Use native sys$delprc() to insure that target process is
1704 * deleted; supervisor-mode images don't pay attention to
1705 * CRTL's emulation of Unix-style signals and kill()
1707 while (++mark <= sp) {
1709 register unsigned long int __vmssts;
1711 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1712 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1713 proc = SvIV_nomg(*mark);
1714 APPLY_TAINT_PROPER();
1715 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1719 case SS$_NOSUCHNODE:
1720 SETERRNO(ESRCH,__vmssts);
1723 SETERRNO(EPERM,__vmssts);
1726 SETERRNO(EVMSERR,__vmssts);
1736 while (++mark <= sp) {
1739 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1740 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1741 proc = SvIV_nomg(*mark);
1742 APPLY_TAINT_PROPER();
1744 if (PerlProc_killpg(proc,val)) /* BSD */
1746 if (PerlProc_kill(-proc,val)) /* SYSV */
1752 while (++mark <= sp) {
1755 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1756 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1757 proc = SvIV_nomg(*mark);
1758 APPLY_TAINT_PROPER();
1759 if (PerlProc_kill(proc, val))
1767 APPLY_TAINT_PROPER();
1769 while (++mark <= sp) {
1770 s = SvPV_nolen_const(*mark);
1771 APPLY_TAINT_PROPER();
1772 if (PL_euid || PL_unsafe) {
1776 else { /* don't let root wipe out directories without -U */
1777 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1786 #if defined(HAS_UTIME) || defined(HAS_FUTIMES)
1788 APPLY_TAINT_PROPER();
1789 if (sp - mark > 2) {
1790 #if defined(HAS_FUTIMES)
1791 struct timeval utbuf[2];
1792 void *utbufp = utbuf;
1793 #elif defined(I_UTIME) || defined(VMS)
1794 struct utimbuf utbuf;
1795 struct utimbuf *utbufp = &utbuf;
1801 void *utbufp = &utbuf;
1804 SV* const accessed = *++mark;
1805 SV* const modified = *++mark;
1807 /* Be like C, and if both times are undefined, let the C
1808 * library figure out what to do. This usually means
1809 * "current time". */
1811 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
1814 Zero(&utbuf, sizeof utbuf, char);
1816 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
1817 utbuf[0].tv_usec = 0;
1818 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
1819 utbuf[1].tv_usec = 0;
1820 #elif defined(BIG_TIME)
1821 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
1822 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
1824 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
1825 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
1828 APPLY_TAINT_PROPER();
1830 while (++mark <= sp) {
1832 if ((gv = MAYBE_DEREF_GV(*mark))) {
1833 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1835 APPLY_TAINT_PROPER();
1836 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))),
1837 (struct timeval *) utbufp))
1840 Perl_die(aTHX_ PL_no_func, "futimes");
1848 const char * const name = SvPV_nomg_const_nolen(*mark);
1849 APPLY_TAINT_PROPER();
1851 if (utimes(name, (struct timeval *)utbufp))
1853 if (PerlLIO_utime(name, utbufp))
1867 #undef APPLY_TAINT_PROPER
1870 /* Do the permissions allow some operation? Assumes statcache already set. */
1871 #ifndef VMS /* VMS' cando is in vms.c */
1873 Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp)
1874 /* effective is a flag, true for EUID, or for checking if the effective gid
1875 * is in the list of groups returned from getgroups().
1880 PERL_ARGS_ASSERT_CANDO;
1883 /* [Comments and code from Len Reed]
1884 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1885 * to write-protected files. The execute permission bit is set
1886 * by the Microsoft C library stat() function for the following:
1891 * All files and directories are readable.
1892 * Directories and special files, e.g. "CON", cannot be
1894 * [Comment by Tom Dinger -- a directory can have the write-protect
1895 * bit set in the file system, but DOS permits changes to
1896 * the directory anyway. In addition, all bets are off
1897 * here for networked software, such as Novell and
1901 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1902 * too so it will actually look into the files for magic numbers
1904 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1906 #else /* ! DOSISH */
1908 if (ingroup(544,effective)) { /* member of Administrators */
1910 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1912 if (mode == S_IXUSR) {
1913 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1917 return TRUE; /* root reads and writes anything */
1920 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1921 if (statbufp->st_mode & mode)
1922 return TRUE; /* ok as "user" */
1924 else if (ingroup(statbufp->st_gid,effective)) {
1925 if (statbufp->st_mode & mode >> 3)
1926 return TRUE; /* ok as "group" */
1928 else if (statbufp->st_mode & mode >> 6)
1929 return TRUE; /* ok as "other" */
1931 #endif /* ! DOSISH */
1936 S_ingroup(pTHX_ Gid_t testgid, bool effective)
1939 if (testgid == (effective ? PL_egid : PL_gid))
1941 #ifdef HAS_GETGROUPS
1943 Groups_t *gary = NULL;
1947 anum = getgroups(0, gary);
1948 Newx(gary, anum, Groups_t);
1949 anum = getgroups(anum, gary);
1951 if (gary[anum] == testgid) {
1964 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1967 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1970 const key_t key = (key_t)SvNVx(*++mark);
1971 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
1972 const I32 flags = SvIVx(*++mark);
1974 PERL_ARGS_ASSERT_DO_IPCGET;
1975 PERL_UNUSED_ARG(sp);
1982 return msgget(key, flags);
1986 return semget(key, (int) SvIV(nsv), flags);
1990 return shmget(key, (size_t) SvUV(nsv), flags);
1992 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1994 /* diag_listed_as: msg%s not implemented */
1995 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1998 return -1; /* should never happen */
2002 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
2007 const I32 id = SvIVx(*++mark);
2009 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
2011 const I32 cmd = SvIVx(*++mark);
2012 SV * const astr = *++mark;
2013 STRLEN infosize = 0;
2014 I32 getinfo = (cmd == IPC_STAT);
2016 PERL_ARGS_ASSERT_DO_IPCCTL;
2017 PERL_UNUSED_ARG(sp);
2023 if (cmd == IPC_STAT || cmd == IPC_SET)
2024 infosize = sizeof(struct msqid_ds);
2029 if (cmd == IPC_STAT || cmd == IPC_SET)
2030 infosize = sizeof(struct shmid_ds);
2036 if (cmd == IPC_STAT || cmd == IPC_SET)
2037 infosize = sizeof(struct semid_ds);
2038 else if (cmd == GETALL || cmd == SETALL)
2040 struct semid_ds semds;
2042 #ifdef EXTRA_F_IN_SEMUN_BUF
2043 semun.buff = &semds;
2047 getinfo = (cmd == GETALL);
2048 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2050 infosize = semds.sem_nsems * sizeof(short);
2051 /* "short" is technically wrong but much more portable
2052 than guessing about u_?short(_t)? */
2055 /* diag_listed_as: sem%s not implemented */
2056 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2060 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2062 /* diag_listed_as: shm%s not implemented */
2063 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2071 SvPV_force_nolen(astr);
2072 a = SvGROW(astr, infosize+1);
2077 a = SvPV(astr, len);
2078 if (len != infosize)
2079 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2087 const IV i = SvIV(astr);
2088 a = INT2PTR(char *,i); /* ouch */
2095 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2101 union semun unsemds;
2103 #ifdef EXTRA_F_IN_SEMUN_BUF
2104 unsemds.buff = (struct semid_ds *)a;
2106 unsemds.buf = (struct semid_ds *)a;
2108 ret = Semctl(id, n, cmd, unsemds);
2110 /* diag_listed_as: sem%s not implemented */
2111 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2118 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2122 if (getinfo && ret >= 0) {
2123 SvCUR_set(astr, infosize);
2124 *SvEND(astr) = '\0';
2131 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2136 const I32 id = SvIVx(*++mark);
2137 SV * const mstr = *++mark;
2138 const I32 flags = SvIVx(*++mark);
2139 const char * const mbuf = SvPV_const(mstr, len);
2140 const I32 msize = len - sizeof(long);
2142 PERL_ARGS_ASSERT_DO_MSGSND;
2143 PERL_UNUSED_ARG(sp);
2146 Perl_croak(aTHX_ "Arg too short for msgsnd");
2148 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2150 PERL_UNUSED_ARG(sp);
2151 PERL_UNUSED_ARG(mark);
2152 /* diag_listed_as: msg%s not implemented */
2153 Perl_croak(aTHX_ "msgsnd not implemented");
2158 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2164 I32 msize, flags, ret;
2165 const I32 id = SvIVx(*++mark);
2166 SV * const mstr = *++mark;
2168 PERL_ARGS_ASSERT_DO_MSGRCV;
2169 PERL_UNUSED_ARG(sp);
2171 /* suppress warning when reading into undef var --jhi */
2173 sv_setpvs(mstr, "");
2174 msize = SvIVx(*++mark);
2175 mtype = (long)SvIVx(*++mark);
2176 flags = SvIVx(*++mark);
2177 SvPV_force_nolen(mstr);
2178 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2181 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2183 SvCUR_set(mstr, sizeof(long)+ret);
2184 *SvEND(mstr) = '\0';
2185 #ifndef INCOMPLETE_TAINTS
2186 /* who knows who has been playing with this message? */
2192 PERL_UNUSED_ARG(sp);
2193 PERL_UNUSED_ARG(mark);
2194 /* diag_listed_as: msg%s not implemented */
2195 Perl_croak(aTHX_ "msgrcv not implemented");
2200 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2205 const I32 id = SvIVx(*++mark);
2206 SV * const opstr = *++mark;
2207 const char * const opbuf = SvPV_const(opstr, opsize);
2209 PERL_ARGS_ASSERT_DO_SEMOP;
2210 PERL_UNUSED_ARG(sp);
2212 if (opsize < 3 * SHORTSIZE
2213 || (opsize % (3 * SHORTSIZE))) {
2214 SETERRNO(EINVAL,LIB_INVARG);
2218 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2220 const int nsops = opsize / (3 * sizeof (short));
2222 short * const ops = (short *) opbuf;
2224 struct sembuf *temps, *t;
2227 Newx (temps, nsops, struct sembuf);
2235 result = semop(id, temps, nsops);
2249 /* diag_listed_as: sem%s not implemented */
2250 Perl_croak(aTHX_ "semop not implemented");
2255 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2260 struct shmid_ds shmds;
2261 const I32 id = SvIVx(*++mark);
2262 SV * const mstr = *++mark;
2263 const I32 mpos = SvIVx(*++mark);
2264 const I32 msize = SvIVx(*++mark);
2266 PERL_ARGS_ASSERT_DO_SHMIO;
2267 PERL_UNUSED_ARG(sp);
2270 if (shmctl(id, IPC_STAT, &shmds) == -1)
2272 if (mpos < 0 || msize < 0
2273 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
2274 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2277 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2278 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2280 if (optype == OP_SHMREAD) {
2282 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2284 sv_setpvs(mstr, "");
2285 SvUPGRADE(mstr, SVt_PV);
2287 mbuf = SvGROW(mstr, (STRLEN)msize+1);
2289 Copy(shm + mpos, mbuf, msize, char);
2290 SvCUR_set(mstr, msize);
2291 *SvEND(mstr) = '\0';
2293 #ifndef INCOMPLETE_TAINTS
2294 /* who knows who has been playing with this shared memory? */
2301 const char *mbuf = SvPV_const(mstr, len);
2302 const I32 n = ((I32)len > msize) ? msize : (I32)len;
2303 Copy(mbuf, shm + mpos, n, char);
2305 memzero(shm + mpos + n, msize - n);
2309 /* diag_listed_as: shm%s not implemented */
2310 Perl_croak(aTHX_ "shm I/O not implemented");
2314 #endif /* SYSV IPC */
2319 =for apidoc start_glob
2321 Function called by C<do_readline> to spawn a glob (or do the glob inside
2322 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2323 this glob starter is only used by miniperl during the build process.
2324 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2330 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2333 SV * const tmpcmd = newSV(0);
2336 PERL_ARGS_ASSERT_START_GLOB;
2340 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2341 /* since spawning off a process is a real performance hit */
2348 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
2353 sv_setpv(tmpcmd, "for a in ");
2354 sv_catsv(tmpcmd, tmpglob);
2355 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2358 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2359 sv_catsv(tmpcmd, tmpglob);
2361 sv_setpv(tmpcmd, "perlglob ");
2362 sv_catsv(tmpcmd, tmpglob);
2363 sv_catpv(tmpcmd, " |");
2368 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2369 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2370 sv_catsv(tmpcmd, tmpglob);
2371 sv_catpv(tmpcmd, "' 2>/dev/null |");
2373 sv_setpv(tmpcmd, "echo ");
2374 sv_catsv(tmpcmd, tmpglob);
2376 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2378 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2381 #endif /* !DOSISH */
2382 save_hash(gv_fetchpvs("ENV", 0, SVt_PVHV));
2383 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2384 FALSE, O_RDONLY, 0, NULL);
2393 * c-indentation-style: bsd
2395 * indent-tabs-mode: t
2398 * ex: set ts=8 sts=4 sw=4 noet: