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) {
884 rc = fchown(PL_lastfd,fileuid,filegid);
887 rc = PerlLIO_chown(PL_oldname,fileuid,filegid);
890 /* XXX silently ignore failures */
894 return IoIFP(GvIOp(gv));
897 if (ckWARN_d(WARN_INPLACE)) {
898 const int eno = errno;
899 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
900 && !S_ISREG(PL_statbuf.st_mode))
902 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
903 "Can't do inplace edit: %s is not a regular file",
907 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
908 PL_oldname, Strerror(eno));
912 if (io && (IoFLAGS(io) & IOf_ARGV))
913 IoFLAGS(io) |= IOf_START;
915 (void)do_close(PL_argvoutgv,FALSE);
916 if (io && (IoFLAGS(io) & IOf_ARGV)
917 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
919 GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
921 SvREFCNT_dec_NN(oldout);
924 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
929 /* explicit renamed to avoid C++ conflict -- kja */
931 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
939 if (!gv || !isGV_with_GP(gv)) {
941 SETERRNO(EBADF,SS_IVCHAN);
945 if (!io) { /* never opened */
948 SETERRNO(EBADF,SS_IVCHAN);
952 retval = io_close(io, not_implicit);
956 IoLINES_LEFT(io) = IoPAGE_LEN(io);
958 IoTYPE(io) = IoTYPE_CLOSED;
963 Perl_io_close(pTHX_ IO *io, bool not_implicit)
968 PERL_ARGS_ASSERT_IO_CLOSE;
971 if (IoTYPE(io) == IoTYPE_PIPE) {
972 const int status = PerlProc_pclose(IoIFP(io));
974 STATUS_NATIVE_CHILD_SET(status);
975 retval = (STATUS_UNIX == 0);
978 retval = (status != -1);
981 else if (IoTYPE(io) == IoTYPE_STD)
984 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
985 const bool prev_err = PerlIO_error(IoOFP(io));
986 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
987 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
990 const bool prev_err = PerlIO_error(IoIFP(io));
991 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
994 IoOFP(io) = IoIFP(io) = NULL;
996 else if (not_implicit) {
997 SETERRNO(EBADF,SS_IVCHAN);
1004 Perl_do_eof(pTHX_ GV *gv)
1007 IO * const io = GvIO(gv);
1009 PERL_ARGS_ASSERT_DO_EOF;
1013 else if (IoTYPE(io) == IoTYPE_WRONLY)
1014 report_wrongway_fh(gv, '>');
1017 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1018 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1019 return FALSE; /* this is the most usual case */
1023 /* getc and ungetc can stomp on errno */
1025 const int ch = PerlIO_getc(IoIFP(io));
1027 (void)PerlIO_ungetc(IoIFP(io),ch);
1034 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1035 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1036 PerlIO_set_cnt(IoIFP(io),-1);
1038 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1039 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
1043 return TRUE; /* normal fp, definitely end of file */
1049 Perl_do_tell(pTHX_ GV *gv)
1052 IO *const io = GvIO(gv);
1055 PERL_ARGS_ASSERT_DO_TELL;
1057 if (io && (fp = IoIFP(io))) {
1058 return PerlIO_tell(fp);
1061 SETERRNO(EBADF,RMS_IFI);
1066 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1069 IO *const io = GvIO(gv);
1072 if (io && (fp = IoIFP(io))) {
1073 return PerlIO_seek(fp, pos, whence) >= 0;
1076 SETERRNO(EBADF,RMS_IFI);
1081 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1084 IO *const io = GvIO(gv);
1087 PERL_ARGS_ASSERT_DO_SYSSEEK;
1089 if (io && (fp = IoIFP(io)))
1090 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1092 SETERRNO(EBADF,RMS_IFI);
1097 Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
1099 int mode = O_BINARY;
1105 if (s[2] == 'a' && s[3] == 'w'
1106 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1115 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1116 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1125 goto fail_discipline;
1128 else if (isSPACE(*s)) {
1135 end = strchr(s+1, ':');
1138 #ifndef PERLIO_LAYERS
1139 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1150 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1152 my_chsize(int fd, Off_t length)
1155 /* code courtesy of William Kucharski */
1160 if (PerlLIO_fstat(fd, &filebuf) < 0)
1163 if (filebuf.st_size < length) {
1165 /* extend file length */
1167 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1170 /* write a "0" byte */
1172 if ((PerlLIO_write(fd, "", 1)) != 1)
1176 /* truncate length */
1180 fl.l_start = length;
1181 fl.l_type = F_WRLCK; /* write lock on file space */
1184 * This relies on the UNDOCUMENTED F_FREESP argument to
1185 * fcntl(2), which truncates the file so that it ends at the
1186 * position indicated by fl.l_start.
1188 * Will minor miracles never cease?
1191 if (fcntl(fd, F_FREESP, &fl) < 0)
1197 Perl_croak_nocontext("truncate not implemented");
1198 #endif /* F_FREESP */
1201 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1204 Perl_do_print(pTHX_ SV *sv, PerlIO *fp)
1208 PERL_ARGS_ASSERT_DO_PRINT;
1210 /* assuming fp is checked earlier */
1213 if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
1214 assert(!SvGMAGICAL(sv));
1216 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1218 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1219 return !PerlIO_error(fp);
1223 /* Do this first to trigger any overloading. */
1224 const char *tmps = SvPV_const(sv, len);
1228 if (PerlIO_isutf8(fp)) { /* If the stream is utf8 ... */
1229 if (!SvUTF8(sv)) { /* Convert to utf8 if necessary */
1230 /* We don't modify the original scalar. */
1231 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1232 tmps = (char *) tmpbuf;
1234 else if (ckWARN4_d(WARN_UTF8, WARN_SURROGATE, WARN_NON_UNICODE, WARN_NONCHAR)) {
1235 (void) check_utf8_print((const U8*) tmps, len);
1237 } /* else stream isn't utf8 */
1238 else if (DO_UTF8(sv)) { /* But if is utf8 internally, attempt to
1240 STRLEN tmplen = len;
1242 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
1245 /* Here, succeeded in downgrading from utf8. Set up to below
1246 * output the converted value */
1248 tmps = (char *) tmpbuf;
1251 else { /* Non-utf8 output stream, but string only representable in
1253 assert((char *)result == tmps);
1254 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
1255 "Wide character in %s",
1256 PL_op ? OP_DESC(PL_op) : "print"
1258 /* Could also check that isn't one of the things to avoid
1259 * in utf8 by using check_utf8_print(), but not doing so,
1260 * since the stream isn't a UTF8 stream */
1263 /* To detect whether the process is about to overstep its
1264 * filesize limit we would need getrlimit(). We could then
1265 * also transparently raise the limit with setrlimit() --
1266 * but only until the system hard limit/the filesystem limit,
1267 * at which we would get EPERM. Note that when using buffered
1268 * io the write failure can be delayed until the flush/close. --jhi */
1269 if (len && (PerlIO_write(fp,tmps,len) == 0))
1272 return happy ? !PerlIO_error(fp) : FALSE;
1277 Perl_my_stat_flags(pTHX_ const U32 flags)
1284 if (PL_op->op_flags & OPf_REF) {
1288 return PL_laststatval;
1291 PL_laststype = OP_STAT;
1292 PL_statgv = gv ? gv : (GV *)io;
1293 sv_setpvs(PL_statname, "");
1296 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1297 } else if (IoDIRP(io)) {
1298 return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
1301 PL_laststatval = -1;
1305 else if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1307 return PL_laststatval;
1309 SV* const sv = TOPs;
1312 if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
1315 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
1316 io = MUTABLE_IO(SvRV(sv));
1318 goto do_fstat_have_io;
1321 s = SvPV_flags_const(sv, len, flags);
1323 sv_setpvn(PL_statname, s, len);
1324 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1325 PL_laststype = OP_STAT;
1326 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1327 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1328 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1329 return PL_laststatval;
1335 Perl_my_lstat_flags(pTHX_ const U32 flags)
1338 static const char* const no_prev_lstat = "The stat preceding -l _ wasn't an lstat";
1341 SV* const sv = TOPs;
1343 if (PL_op->op_flags & OPf_REF) {
1344 if (cGVOP_gv == PL_defgv) {
1345 if (PL_laststype != OP_LSTAT)
1346 Perl_croak(aTHX_ "%s", no_prev_lstat);
1347 return PL_laststatval;
1349 PL_laststatval = -1;
1350 if (ckWARN(WARN_IO)) {
1351 /* diag_listed_as: Use of -l on filehandle%s */
1352 Perl_warner(aTHX_ packWARN(WARN_IO),
1353 "Use of -l on filehandle %"HEKf,
1354 HEKfARG(GvENAME_HEK(cGVOP_gv)));
1358 if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
1360 if (PL_laststype != OP_LSTAT)
1361 Perl_croak(aTHX_ "%s", no_prev_lstat);
1362 return PL_laststatval;
1365 PL_laststype = OP_LSTAT;
1367 if ( ( (SvROK(sv) && ( isGV_with_GP(SvRV(sv))
1368 || (isio = SvTYPE(SvRV(sv)) == SVt_PVIO) )
1372 && ckWARN(WARN_IO)) {
1374 /* diag_listed_as: Use of -l on filehandle%s */
1375 Perl_warner(aTHX_ packWARN(WARN_IO),
1376 "Use of -l on filehandle");
1378 /* diag_listed_as: Use of -l on filehandle%s */
1379 Perl_warner(aTHX_ packWARN(WARN_IO),
1380 "Use of -l on filehandle %"HEKf,
1381 GvENAME_HEK((const GV *)
1382 (SvROK(sv) ? SvRV(sv) : sv)));
1384 file = SvPV_flags_const_nolen(sv, flags);
1385 sv_setpv(PL_statname,file);
1386 PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
1387 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(file, '\n'))
1388 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1389 return PL_laststatval;
1393 S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1395 const int e = errno;
1396 PERL_ARGS_ASSERT_EXEC_FAILED;
1397 if (ckWARN(WARN_EXEC))
1398 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1401 int rc = PerlLIO_write(fd, (void*)&e, sizeof(int));
1402 /* silently ignore failures */
1403 PERL_UNUSED_VAR(rc);
1409 Perl_do_aexec5(pTHX_ SV *really, SV **mark, SV **sp,
1410 int fd, int do_report)
1413 PERL_ARGS_ASSERT_DO_AEXEC5;
1414 #if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
1415 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1419 const char *tmps = NULL;
1420 Newx(PL_Argv, sp - mark + 1, const char*);
1423 while (++mark <= sp) {
1425 *a++ = SvPV_nolen_const(*mark);
1431 tmps = SvPV_nolen_const(really);
1432 if ((!really && *PL_Argv[0] != '/') ||
1433 (really && *tmps != '/')) /* will execvp use PATH? */
1434 TAINT_ENV(); /* testing IFS here is overkill, probably */
1436 if (really && *tmps)
1437 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1439 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1441 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
1449 Perl_do_execfree(pTHX)
1458 #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
1461 Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
1468 /* Make a copy so we can change it */
1469 const Size_t cmdlen = strlen(incmd) + 1;
1471 PERL_ARGS_ASSERT_DO_EXEC3;
1473 Newx(buf, cmdlen, char);
1475 memcpy(cmd, incmd, cmdlen);
1477 while (*cmd && isSPACE(*cmd))
1480 /* save an extra exec if possible */
1484 char flags[PERL_FLAGS_MAX];
1485 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1486 strnEQ(cmd+PL_cshlen," -c",3)) {
1487 my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
1488 s = cmd+PL_cshlen+3;
1491 my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
1496 char * const ncmd = s;
1502 if (s[-1] == '\'') {
1505 PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
1508 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
1517 /* see if there are shell metacharacters in it */
1519 if (*cmd == '.' && isSPACE(cmd[1]))
1522 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1526 while (isWORDCHAR(*s))
1527 s++; /* catch VAR=val gizmo */
1531 for (s = cmd; *s; s++) {
1532 if (*s != ' ' && !isALPHA(*s) &&
1533 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1534 if (*s == '\n' && !s[1]) {
1538 /* handle the 2>&1 construct at the end */
1539 if (*s == '>' && s[1] == '&' && s[2] == '1'
1540 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1541 && (!s[3] || isSPACE(s[3])))
1543 const char *t = s + 3;
1545 while (*t && isSPACE(*t))
1547 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1554 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
1556 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
1562 Newx(PL_Argv, (s - cmd) / 2 + 2, const char*);
1563 PL_Cmd = savepvn(cmd, s-cmd);
1565 for (s = PL_Cmd; *s;) {
1570 while (*s && !isSPACE(*s))
1578 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1580 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1584 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
1591 #endif /* OS2 || WIN32 */
1594 #include <starlet.h> /* for sys$delprc */
1598 Perl_apply(pTHX_ I32 type, SV **mark, SV **sp)
1603 const char *const what = PL_op_name[type];
1606 SV ** const oldmark = mark;
1607 bool killgp = FALSE;
1609 PERL_ARGS_ASSERT_APPLY;
1611 PERL_UNUSED_VAR(what); /* may not be used depending on compile options */
1613 /* Doing this ahead of the switch statement preserves the old behaviour,
1614 where attempting to use kill as a taint test test would fail on
1615 platforms where kill was not defined. */
1617 if (type == OP_KILL)
1618 Perl_die(aTHX_ PL_no_func, what);
1621 if (type == OP_CHOWN)
1622 Perl_die(aTHX_ PL_no_func, what);
1626 #define APPLY_TAINT_PROPER() \
1628 if (TAINT_get) { TAINT_PROPER(what); } \
1631 /* This is a first heuristic; it doesn't catch tainting magic. */
1633 while (++mark <= sp) {
1634 if (SvTAINTED(*mark)) {
1643 APPLY_TAINT_PROPER();
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 (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1657 Perl_die(aTHX_ PL_no_func, "fchmod");
1665 const char *name = SvPV_nomg_const(*mark, len);
1666 APPLY_TAINT_PROPER();
1667 if (!IS_SAFE_PATHNAME(name, len, "chmod") ||
1668 PerlLIO_chmod(name, val)) {
1677 APPLY_TAINT_PROPER();
1678 if (sp - mark > 2) {
1680 val = SvIVx(*++mark);
1681 val2 = SvIVx(*++mark);
1682 APPLY_TAINT_PROPER();
1684 while (++mark <= sp) {
1686 if ((gv = MAYBE_DEREF_GV(*mark))) {
1687 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1689 APPLY_TAINT_PROPER();
1690 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1693 Perl_die(aTHX_ PL_no_func, "fchown");
1701 const char *name = SvPV_nomg_const(*mark, len);
1702 APPLY_TAINT_PROPER();
1703 if (!IS_SAFE_PATHNAME(name, len, "chown") ||
1704 PerlLIO_chown(name, val, val2)) {
1713 XXX Should we make lchown() directly available from perl?
1714 For now, we'll let Configure test for HAS_LCHOWN, but do
1715 nothing in the core.
1720 APPLY_TAINT_PROPER();
1723 s = SvPVx_const(*++mark, len);
1724 if (*s == '-' && isALPHA(s[1]))
1731 if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
1735 if ((val = whichsig_pvn(s, len)) < 0)
1736 Perl_croak(aTHX_ "Unrecognized signal name \"%"SVf"\"", SVfARG(*mark));
1747 APPLY_TAINT_PROPER();
1750 /* kill() doesn't do process groups (job trees?) under VMS */
1751 if (val == SIGKILL) {
1752 /* Use native sys$delprc() to insure that target process is
1753 * deleted; supervisor-mode images don't pay attention to
1754 * CRTL's emulation of Unix-style signals and kill()
1756 while (++mark <= sp) {
1758 unsigned long int __vmssts;
1760 if (!(SvIOK(*mark) || SvNOK(*mark) || looks_like_number(*mark)))
1761 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1762 proc = SvIV_nomg(*mark);
1763 APPLY_TAINT_PROPER();
1764 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1768 case SS$_NOSUCHNODE:
1769 SETERRNO(ESRCH,__vmssts);
1772 SETERRNO(EPERM,__vmssts);
1775 SETERRNO(EVMSERR,__vmssts);
1783 while (++mark <= sp) {
1786 if (!(SvNIOK(*mark) || looks_like_number(*mark)))
1787 Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
1788 proc = SvIV_nomg(*mark);
1793 APPLY_TAINT_PROPER();
1794 if (PerlProc_kill(proc, val))
1801 APPLY_TAINT_PROPER();
1803 while (++mark <= sp) {
1804 s = SvPV_const(*mark, len);
1805 APPLY_TAINT_PROPER();
1806 if (!IS_SAFE_PATHNAME(s, len, "unlink")) {
1809 else if (PerlProc_geteuid() || PL_unsafe) {
1813 else { /* don't let root wipe out directories without -U */
1814 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1823 #if defined(HAS_UTIME) || defined(HAS_FUTIMES)
1825 APPLY_TAINT_PROPER();
1826 if (sp - mark > 2) {
1827 #if defined(HAS_FUTIMES)
1828 struct timeval utbuf[2];
1829 void *utbufp = utbuf;
1830 #elif defined(I_UTIME) || defined(VMS)
1831 struct utimbuf utbuf;
1832 struct utimbuf *utbufp = &utbuf;
1838 void *utbufp = &utbuf;
1841 SV* const accessed = *++mark;
1842 SV* const modified = *++mark;
1844 /* Be like C, and if both times are undefined, let the C
1845 * library figure out what to do. This usually means
1846 * "current time". */
1848 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
1851 Zero(&utbuf, sizeof utbuf, char);
1853 utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
1854 utbuf[0].tv_usec = 0;
1855 utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
1856 utbuf[1].tv_usec = 0;
1857 #elif defined(BIG_TIME)
1858 utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
1859 utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
1861 utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
1862 utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
1865 APPLY_TAINT_PROPER();
1867 while (++mark <= sp) {
1869 if ((gv = MAYBE_DEREF_GV(*mark))) {
1870 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1872 APPLY_TAINT_PROPER();
1873 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))),
1874 (struct timeval *) utbufp))
1877 Perl_die(aTHX_ PL_no_func, "futimes");
1885 const char * const name = SvPV_nomg_const(*mark, len);
1886 APPLY_TAINT_PROPER();
1887 if (!IS_SAFE_PATHNAME(name, len, "utime")) {
1892 if (utimes(name, (struct timeval *)utbufp))
1894 if (PerlLIO_utime(name, utbufp))
1908 #undef APPLY_TAINT_PROPER
1911 /* Do the permissions allow some operation? Assumes statcache already set. */
1912 #ifndef VMS /* VMS' cando is in vms.c */
1914 Perl_cando(pTHX_ Mode_t mode, bool effective, const Stat_t *statbufp)
1915 /* effective is a flag, true for EUID, or for checking if the effective gid
1916 * is in the list of groups returned from getgroups().
1921 PERL_ARGS_ASSERT_CANDO;
1924 /* [Comments and code from Len Reed]
1925 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1926 * to write-protected files. The execute permission bit is set
1927 * by the Microsoft C library stat() function for the following:
1932 * All files and directories are readable.
1933 * Directories and special files, e.g. "CON", cannot be
1935 * [Comment by Tom Dinger -- a directory can have the write-protect
1936 * bit set in the file system, but DOS permits changes to
1937 * the directory anyway. In addition, all bets are off
1938 * here for networked software, such as Novell and
1942 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1943 * too so it will actually look into the files for magic numbers
1945 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1947 #else /* ! DOSISH */
1949 if (ingroup(544,effective)) { /* member of Administrators */
1951 if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 0) { /* root is special */
1953 if (mode == S_IXUSR) {
1954 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1958 return TRUE; /* root reads and writes anything */
1961 if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) {
1962 if (statbufp->st_mode & mode)
1963 return TRUE; /* ok as "user" */
1965 else if (ingroup(statbufp->st_gid,effective)) {
1966 if (statbufp->st_mode & mode >> 3)
1967 return TRUE; /* ok as "group" */
1969 else if (statbufp->st_mode & mode >> 6)
1970 return TRUE; /* ok as "other" */
1972 #endif /* ! DOSISH */
1977 S_ingroup(pTHX_ Gid_t testgid, bool effective)
1980 if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid()))
1982 #ifdef HAS_GETGROUPS
1984 Groups_t *gary = NULL;
1988 anum = getgroups(0, gary);
1989 Newx(gary, anum, Groups_t);
1990 anum = getgroups(anum, gary);
1992 if (gary[anum] == testgid) {
2005 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
2008 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
2011 const key_t key = (key_t)SvNVx(*++mark);
2012 SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
2013 const I32 flags = SvIVx(*++mark);
2015 PERL_ARGS_ASSERT_DO_IPCGET;
2016 PERL_UNUSED_ARG(sp);
2023 return msgget(key, flags);
2027 return semget(key, (int) SvIV(nsv), flags);
2031 return shmget(key, (size_t) SvUV(nsv), flags);
2033 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2035 /* diag_listed_as: msg%s not implemented */
2036 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2039 return -1; /* should never happen */
2043 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
2048 const I32 id = SvIVx(*++mark);
2050 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
2052 const I32 cmd = SvIVx(*++mark);
2053 SV * const astr = *++mark;
2054 STRLEN infosize = 0;
2055 I32 getinfo = (cmd == IPC_STAT);
2057 PERL_ARGS_ASSERT_DO_IPCCTL;
2058 PERL_UNUSED_ARG(sp);
2064 if (cmd == IPC_STAT || cmd == IPC_SET)
2065 infosize = sizeof(struct msqid_ds);
2070 if (cmd == IPC_STAT || cmd == IPC_SET)
2071 infosize = sizeof(struct shmid_ds);
2077 if (cmd == IPC_STAT || cmd == IPC_SET)
2078 infosize = sizeof(struct semid_ds);
2079 else if (cmd == GETALL || cmd == SETALL)
2081 struct semid_ds semds;
2083 #ifdef EXTRA_F_IN_SEMUN_BUF
2084 semun.buff = &semds;
2088 getinfo = (cmd == GETALL);
2089 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2091 infosize = semds.sem_nsems * sizeof(short);
2092 /* "short" is technically wrong but much more portable
2093 than guessing about u_?short(_t)? */
2096 /* diag_listed_as: sem%s not implemented */
2097 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2101 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2103 /* diag_listed_as: shm%s not implemented */
2104 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2112 SvPV_force_nolen(astr);
2113 a = SvGROW(astr, infosize+1);
2118 a = SvPV(astr, len);
2119 if (len != infosize)
2120 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2128 const IV i = SvIV(astr);
2129 a = INT2PTR(char *,i); /* ouch */
2136 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2142 union semun unsemds;
2144 #ifdef EXTRA_F_IN_SEMUN_BUF
2145 unsemds.buff = (struct semid_ds *)a;
2147 unsemds.buf = (struct semid_ds *)a;
2149 ret = Semctl(id, n, cmd, unsemds);
2151 /* diag_listed_as: sem%s not implemented */
2152 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2159 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2163 if (getinfo && ret >= 0) {
2164 SvCUR_set(astr, infosize);
2165 *SvEND(astr) = '\0';
2172 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2177 const I32 id = SvIVx(*++mark);
2178 SV * const mstr = *++mark;
2179 const I32 flags = SvIVx(*++mark);
2180 const char * const mbuf = SvPV_const(mstr, len);
2181 const I32 msize = len - sizeof(long);
2183 PERL_ARGS_ASSERT_DO_MSGSND;
2184 PERL_UNUSED_ARG(sp);
2187 Perl_croak(aTHX_ "Arg too short for msgsnd");
2189 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2191 PERL_UNUSED_ARG(sp);
2192 PERL_UNUSED_ARG(mark);
2193 /* diag_listed_as: msg%s not implemented */
2194 Perl_croak(aTHX_ "msgsnd not implemented");
2200 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2206 I32 msize, flags, ret;
2207 const I32 id = SvIVx(*++mark);
2208 SV * const mstr = *++mark;
2210 PERL_ARGS_ASSERT_DO_MSGRCV;
2211 PERL_UNUSED_ARG(sp);
2213 /* suppress warning when reading into undef var --jhi */
2215 sv_setpvs(mstr, "");
2216 msize = SvIVx(*++mark);
2217 mtype = (long)SvIVx(*++mark);
2218 flags = SvIVx(*++mark);
2219 SvPV_force_nolen(mstr);
2220 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2223 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2225 SvCUR_set(mstr, sizeof(long)+ret);
2226 *SvEND(mstr) = '\0';
2227 /* who knows who has been playing with this message? */
2232 PERL_UNUSED_ARG(sp);
2233 PERL_UNUSED_ARG(mark);
2234 /* diag_listed_as: msg%s not implemented */
2235 Perl_croak(aTHX_ "msgrcv not implemented");
2241 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2246 const I32 id = SvIVx(*++mark);
2247 SV * const opstr = *++mark;
2248 const char * const opbuf = SvPV_const(opstr, opsize);
2250 PERL_ARGS_ASSERT_DO_SEMOP;
2251 PERL_UNUSED_ARG(sp);
2253 if (opsize < 3 * SHORTSIZE
2254 || (opsize % (3 * SHORTSIZE))) {
2255 SETERRNO(EINVAL,LIB_INVARG);
2259 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2261 const int nsops = opsize / (3 * sizeof (short));
2263 short * const ops = (short *) opbuf;
2265 struct sembuf *temps, *t;
2268 Newx (temps, nsops, struct sembuf);
2276 result = semop(id, temps, nsops);
2290 /* diag_listed_as: sem%s not implemented */
2291 Perl_croak(aTHX_ "semop not implemented");
2296 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2301 struct shmid_ds shmds;
2302 const I32 id = SvIVx(*++mark);
2303 SV * const mstr = *++mark;
2304 const I32 mpos = SvIVx(*++mark);
2305 const I32 msize = SvIVx(*++mark);
2307 PERL_ARGS_ASSERT_DO_SHMIO;
2308 PERL_UNUSED_ARG(sp);
2311 if (shmctl(id, IPC_STAT, &shmds) == -1)
2313 if (mpos < 0 || msize < 0
2314 || (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
2315 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2318 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2319 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2321 if (optype == OP_SHMREAD) {
2323 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2325 SvUPGRADE(mstr, SVt_PV);
2327 sv_setpvs(mstr, "");
2329 mbuf = SvGROW(mstr, (STRLEN)msize+1);
2331 Copy(shm + mpos, mbuf, msize, char);
2332 SvCUR_set(mstr, msize);
2333 *SvEND(mstr) = '\0';
2335 /* who knows who has been playing with this shared memory? */
2341 const char *mbuf = SvPV_const(mstr, len);
2342 const I32 n = ((I32)len > msize) ? msize : (I32)len;
2343 Copy(mbuf, shm + mpos, n, char);
2345 memzero(shm + mpos + n, msize - n);
2349 /* diag_listed_as: shm%s not implemented */
2350 Perl_croak(aTHX_ "shm I/O not implemented");
2355 #endif /* SYSV IPC */
2360 =for apidoc start_glob
2362 Function called by C<do_readline> to spawn a glob (or do the glob inside
2363 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2364 this glob starter is only used by miniperl during the build process.
2365 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2371 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2374 SV * const tmpcmd = newSV(0);
2377 const char *s = SvPV(tmpglob, len);
2379 PERL_ARGS_ASSERT_START_GLOB;
2381 if (!IS_SAFE_SYSCALL(s, len, "pattern", "glob"))
2386 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2387 /* since spawning off a process is a real performance hit */
2394 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
2399 sv_setpv(tmpcmd, "for a in ");
2400 sv_catsv(tmpcmd, tmpglob);
2401 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2404 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2405 sv_catsv(tmpcmd, tmpglob);
2407 sv_setpv(tmpcmd, "perlglob ");
2408 sv_catsv(tmpcmd, tmpglob);
2409 sv_catpv(tmpcmd, " |");
2414 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2415 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2416 sv_catsv(tmpcmd, tmpglob);
2417 sv_catpv(tmpcmd, "' 2>/dev/null |");
2419 sv_setpv(tmpcmd, "echo ");
2420 sv_catsv(tmpcmd, tmpglob);
2422 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2424 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2427 #endif /* !DOSISH */
2429 GV * const envgv = gv_fetchpvs("ENV", 0, SVt_PVHV);
2430 SV ** const home = hv_fetchs(GvHV(envgv), "HOME", 0);
2431 SV ** const path = hv_fetchs(GvHV(envgv), "PATH", 0);
2432 if (home && *home) SvGETMAGIC(*home);
2433 if (path && *path) SvGETMAGIC(*path);
2434 save_hash(gv_fetchpvs("ENV", 0, SVt_PVHV));
2435 if (home && *home) SvSETMAGIC(*home);
2436 if (path && *path) SvSETMAGIC(*path);
2438 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2439 FALSE, O_RDONLY, 0, NULL);
2444 if (!fp && ckWARN(WARN_GLOB)) {
2445 Perl_warner(aTHX_ packWARN(WARN_GLOB), "glob failed (can't start child: %s)",
2454 * c-indentation-style: bsd
2456 * indent-tabs-mode: nil
2459 * ex: set ts=8 sts=4 sw=4 et: