3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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."
18 /* This file contains functions that do the actual I/O on behalf of ops.
19 * For example, pp_print() calls the do_print() function in this file for
20 * each argument needing printing.
24 #define PERL_IN_DOIO_C
27 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
36 # ifndef HAS_SHMAT_PROTOTYPE
37 extern Shmat_t shmat (int, char *, int);
43 # if defined(_MSC_VER) || defined(__MINGW32__)
44 # include <sys/utime.h>
51 # define OPEN_EXCL O_EXCL
56 #define PERL_MODE_MAX 8
57 #define PERL_FLAGS_MAX 10
62 Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw,
63 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
67 register IO * const io = GvIOn(gv);
68 PerlIO *saveifp = NULL;
69 PerlIO *saveofp = NULL;
71 char savetype = IoTYPE_CLOSED;
76 bool was_fdopen = FALSE;
77 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
79 char mode[PERL_MODE_MAX]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */
82 Zero(mode,sizeof(mode),char);
83 PL_forkprocess = 1; /* assume true if no fork */
85 /* Collect default raw/crlf info from the op */
86 if (PL_op && PL_op->op_type == OP_OPEN) {
87 /* set up IO layers */
88 const U8 flags = PL_op->op_private;
89 in_raw = (flags & OPpOPEN_IN_RAW);
90 in_crlf = (flags & OPpOPEN_IN_CRLF);
91 out_raw = (flags & OPpOPEN_OUT_RAW);
92 out_crlf = (flags & OPpOPEN_OUT_CRLF);
95 /* If currently open - close before we re-open */
97 fd = PerlIO_fileno(IoIFP(io));
98 if (IoTYPE(io) == IoTYPE_STD) {
99 /* This is a clone of one of STD* handles */
102 else if (fd >= 0 && fd <= PL_maxsysfd) {
103 /* This is one of the original STD* handles */
106 savetype = IoTYPE(io);
110 else if (IoTYPE(io) == IoTYPE_PIPE)
111 result = PerlProc_pclose(IoIFP(io));
112 else if (IoIFP(io) != IoOFP(io)) {
114 result = PerlIO_close(IoOFP(io));
115 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
118 result = PerlIO_close(IoIFP(io));
121 result = PerlIO_close(IoIFP(io));
122 if (result == EOF && fd > PL_maxsysfd) {
123 /* Why is this not Perl_warn*() call ? */
124 PerlIO_printf(Perl_error_log,
125 "Warning: unable to close filehandle %s properly.\n",
128 IoOFP(io) = IoIFP(io) = NULL;
132 /* sysopen style args, i.e. integer mode and permissions */
134 const int appendtrunc =
136 #ifdef O_APPEND /* Not fully portable. */
139 #ifdef O_TRUNC /* Not fully portable. */
143 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
147 Perl_croak(aTHX_ "panic: sysopen with multiple args");
155 It might be (in OS/390 and Mac OS Classic it is)
161 This means that simple & with O_RDWR would look
162 like O_RDONLY is present. Therefore we have to
165 if ((ismodifying = (rawmode & modifyingmode))) {
166 if ((ismodifying & O_WRONLY) == O_WRONLY ||
167 (ismodifying & O_RDWR) == O_RDWR ||
168 (ismodifying & (O_CREAT|appendtrunc)))
169 TAINT_PROPER("sysopen");
171 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
173 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
174 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
177 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
179 namesv = sv_2mortal(newSVpv(oname,0));
183 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
186 /* Regular (non-sys) open */
191 PerlIO *that_fp = NULL;
193 type = savepvn(oname, len);
197 /* Lose leading and trailing white space */
198 for (; isSPACE(*type); type++) ;
199 while (tend > type && isSPACE(tend[-1]))
203 /* New style explicit name, type is just mode and layer info */
205 if (SvROK(*svp) && !strchr(oname,'&')) {
207 Perl_warner(aTHX_ packWARN(WARN_IO),
208 "Can't open a reference");
209 SETERRNO(EINVAL, LIB_INVARG);
212 #endif /* USE_STDIO */
213 name = SvOK(*svp) ? savesvpv (*svp) : savepvn ("", 0);
221 if ((*type == IoTYPE_RDWR) && /* scary */
222 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
223 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
224 TAINT_PROPER("open");
229 if (*type == IoTYPE_PIPE) {
231 if (type[1] != IoTYPE_STD) {
233 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
237 for (type++; isSPACE(*type); type++) ;
243 /* command is missing 19990114 */
244 if (ckWARN(WARN_PIPE))
245 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
249 if ((*name == '-' && name[1] == '\0') || num_svs)
251 TAINT_PROPER("piped open");
252 if (!num_svs && name[len-1] == '|') {
254 if (ckWARN(WARN_PIPE))
255 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
261 strlcat(mode, "b", PERL_MODE_MAX);
263 strlcat(mode, "t", PERL_MODE_MAX);
271 fp = PerlProc_popen_list(mode, num_svs, svp);
274 fp = PerlProc_popen(name,mode);
278 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
284 else if (*type == IoTYPE_WRONLY) {
285 TAINT_PROPER("open");
287 if (*type == IoTYPE_WRONLY) {
288 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
289 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
299 strlcat(mode, "b", PERL_MODE_MAX);
301 strlcat(mode, "t", PERL_MODE_MAX);
310 dodup = PERLIO_DUP_FD;
316 if (!num_svs && !*type && supplied_fp) {
317 /* "<+&" etc. is used by typemaps */
322 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
324 for (; isSPACE(*type); type++) ;
325 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
329 else if (isDIGIT(*type)) {
335 thatio = sv_2io(*svp);
339 thatgv = gv_fetchpvn_flags(type, tend - type,
341 thatio = GvIO(thatgv);
345 SETERRNO(EINVAL,SS_IVCHAN);
349 if ((that_fp = IoIFP(thatio))) {
350 /* Flush stdio buffer before dup. --mjd
351 * Unfortunately SEEK_CURing 0 seems to
352 * be optimized away on most platforms;
353 * only Solaris and Linux seem to flush
356 /* sfio fails to clear error on next
357 sfwrite, contrary to documentation.
359 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
360 PerlIO_clearerr(that_fp);
362 /* On the other hand, do all platforms
363 * take gracefully to flushing a read-only
364 * filehandle? Perhaps we should do
365 * fsetpos(src)+fgetpos(dst)? --nik */
366 PerlIO_flush(that_fp);
367 fd = PerlIO_fileno(that_fp);
368 /* When dup()ing STDIN, STDOUT or STDERR
369 * explicitly set appropriate access mode */
370 if (that_fp == PerlIO_stdout()
371 || that_fp == PerlIO_stderr())
372 IoTYPE(io) = IoTYPE_WRONLY;
373 else if (that_fp == PerlIO_stdin())
374 IoTYPE(io) = IoTYPE_RDONLY;
375 /* When dup()ing a socket, say result is
377 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
378 IoTYPE(io) = IoTYPE_SOCKET;
386 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
390 fd = PerlLIO_dup(fd);
393 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
394 if (dodup && fd >= 0)
401 for (; isSPACE(*type); type++) ;
402 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
404 fp = PerlIO_stdout();
405 IoTYPE(io) = IoTYPE_STD;
407 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
412 namesv = sv_2mortal(newSVpvn(type,tend - type));
417 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
420 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
421 goto unknown_open_mode;
422 } /* IoTYPE_WRONLY */
423 else if (*type == IoTYPE_RDONLY) {
424 for (type++; isSPACE(*type); type++) ;
428 strlcat(mode, "b", PERL_MODE_MAX);
430 strlcat(mode, "t", PERL_MODE_MAX);
440 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
443 IoTYPE(io) = IoTYPE_STD;
445 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
450 namesv = sv_2mortal(newSVpvn(type,tend - type));
455 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
457 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
458 goto unknown_open_mode;
459 } /* IoTYPE_RDONLY */
460 else if ((num_svs && /* '-|...' or '...|' */
461 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
462 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
464 type += 2; /* skip over '-|' */
468 while (tend > type && isSPACE(tend[-1]))
470 for (; isSPACE(*type); type++)
476 /* command is missing 19990114 */
477 if (ckWARN(WARN_PIPE))
478 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
482 if (!(*name == '-' && name[1] == '\0') || num_svs)
484 TAINT_PROPER("piped open");
489 strlcat(mode, "b", PERL_MODE_MAX);
491 strlcat(mode, "t", PERL_MODE_MAX);
500 fp = PerlProc_popen_list(mode,num_svs,svp);
503 fp = PerlProc_popen(name,mode);
505 IoTYPE(io) = IoTYPE_PIPE;
507 for (; isSPACE(*type); type++) ;
509 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
515 else { /* layer(Args) */
517 goto unknown_open_mode;
519 IoTYPE(io) = IoTYPE_RDONLY;
520 for (; isSPACE(*name); name++)
526 strlcat(mode, "b", PERL_MODE_MAX);
528 strlcat(mode, "t", PERL_MODE_MAX);
536 if (*name == '-' && name[1] == '\0') {
538 IoTYPE(io) = IoTYPE_STD;
542 namesv = sv_2mortal(newSVpvn(type,tend - type));
547 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
552 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
553 && strchr(oname, '\n')
556 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
560 if (ckWARN(WARN_IO)) {
561 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
562 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
563 Perl_warner(aTHX_ packWARN(WARN_IO),
564 "Filehandle STD%s reopened as %s only for input",
565 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
568 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
569 Perl_warner(aTHX_ packWARN(WARN_IO),
570 "Filehandle STDIN reopened as %s only for output",
575 fd = PerlIO_fileno(fp);
576 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
577 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
578 * type probe for socket-ness.
580 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
581 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
582 /* If PerlIO claims to have fd we had better be able to fstat() it. */
583 (void) PerlIO_close(fp);
587 if (S_ISSOCK(PL_statbuf.st_mode))
588 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
592 !(PL_statbuf.st_mode & S_IFMT)
596 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
597 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
598 ) { /* on OS's that return 0 on fstat()ed pipe */
600 Sock_size_t buflen = sizeof tmpbuf;
601 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
602 || errno != ENOTSOCK)
603 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
604 /* but some return 0 for streams too, sigh */
606 #endif /* HAS_SOCKET */
607 #endif /* !PERL_MICRO */
611 * If this is a standard handle we discard all the layer stuff
612 * and just dup the fd into whatever was on the handle before !
615 if (saveifp) { /* must use old fp? */
616 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
617 then dup the new fileno down
620 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
621 if (saveofp != saveifp) { /* was a socket? */
622 PerlIO_close(saveofp);
626 /* Still a small can-of-worms here if (say) PerlIO::scalar
627 is assigned to (say) STDOUT - for now let dup2() fail
628 and provide the error
630 if (PerlLIO_dup2(fd, savefd) < 0) {
631 (void)PerlIO_close(fp);
635 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
636 char newname[FILENAME_MAX+1];
637 if (PerlIO_getname(fp, newname)) {
638 if (fd == PerlIO_fileno(PerlIO_stdout()))
639 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
640 if (fd == PerlIO_fileno(PerlIO_stderr()))
641 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
647 /* PL_fdpid isn't used on Windows, so avoid this useless work.
648 * XXX Probably the same for a lot of other places. */
654 sv = *av_fetch(PL_fdpid,fd,TRUE);
655 SvUPGRADE(sv, SVt_IV);
658 sv = *av_fetch(PL_fdpid,savefd,TRUE);
659 SvUPGRADE(sv, SVt_IV);
666 /* need to close fp without closing underlying fd */
667 int ofd = PerlIO_fileno(fp);
668 int dupfd = PerlLIO_dup(ofd);
669 #if defined(HAS_FCNTL) && defined(F_SETFD)
670 /* Assume if we have F_SETFD we have F_GETFD */
671 int coe = fcntl(ofd,F_GETFD);
674 PerlLIO_dup2(dupfd,ofd);
675 #if defined(HAS_FCNTL) && defined(F_SETFD)
676 /* The dup trick has lost close-on-exec on ofd */
677 fcntl(ofd,F_SETFD, coe);
679 PerlLIO_close(dupfd);
686 fd = PerlIO_fileno(fp);
688 #if defined(HAS_FCNTL) && defined(F_SETFD)
690 const int save_errno = errno;
691 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
697 IoFLAGS(io) &= ~IOf_NOLINE;
699 if (IoTYPE(io) == IoTYPE_SOCKET
700 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
702 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
705 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
719 IoTYPE(io) = savetype;
724 Perl_nextargv(pTHX_ register GV *gv)
728 #ifndef FLEXFILENAMES
734 IO * const io = GvIOp(gv);
737 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
738 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
739 IoFLAGS(io) &= ~IOf_START;
741 if (!PL_argvout_stack)
742 PL_argvout_stack = newAV();
743 av_push(PL_argvout_stack, SvREFCNT_inc_simple(PL_defoutgv));
746 if (PL_filemode & (S_ISUID|S_ISGID)) {
747 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
750 (void)fchmod(PL_lastfd,PL_filemode);
752 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
759 while (av_len(GvAV(gv)) >= 0) {
761 sv = av_shift(GvAV(gv));
763 sv_setsv(GvSVn(gv),sv);
764 SvSETMAGIC(GvSV(gv));
765 PL_oldname = SvPVx(GvSV(gv), oldlen);
766 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) {
768 TAINT_PROPER("inplace open");
769 if (oldlen == 1 && *PL_oldname == '-') {
770 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
772 return IoIFP(GvIOp(gv));
774 #ifndef FLEXFILENAMES
775 filedev = PL_statbuf.st_dev;
776 fileino = PL_statbuf.st_ino;
778 PL_filemode = PL_statbuf.st_mode;
779 fileuid = PL_statbuf.st_uid;
780 filegid = PL_statbuf.st_gid;
781 if (!S_ISREG(PL_filemode)) {
782 if (ckWARN_d(WARN_INPLACE))
783 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
784 "Can't do inplace edit: %s is not a regular file",
790 const char *star = strchr(PL_inplace, '*');
792 const char *begin = PL_inplace;
793 sv_setpvn(sv, "", 0);
795 sv_catpvn(sv, begin, star - begin);
796 sv_catpvn(sv, PL_oldname, oldlen);
798 } while ((star = strchr(begin, '*')));
803 sv_catpv(sv,PL_inplace);
805 #ifndef FLEXFILENAMES
806 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
807 && PL_statbuf.st_dev == filedev
808 && PL_statbuf.st_ino == fileino)
810 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
814 if (ckWARN_d(WARN_INPLACE))
815 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
816 "Can't do inplace edit: %"SVf" would not be unique",
823 #if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
824 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
825 if (ckWARN_d(WARN_INPLACE))
826 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
827 "Can't rename %s to %"SVf": %s, skipping file",
828 PL_oldname, sv, Strerror(errno) );
834 (void)PerlLIO_unlink(SvPVX_const(sv));
835 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
836 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),PL_inplace!=0,
840 (void)UNLINK(SvPVX_const(sv));
841 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
842 if (ckWARN_d(WARN_INPLACE))
843 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
844 "Can't rename %s to %"SVf": %s, skipping file",
845 PL_oldname, sv, Strerror(errno) );
849 (void)UNLINK(PL_oldname);
853 #if !defined(DOSISH) && !defined(AMIGAOS)
854 # ifndef VMS /* Don't delete; use automatic file versioning */
855 if (UNLINK(PL_oldname) < 0) {
856 if (ckWARN_d(WARN_INPLACE))
857 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
858 "Can't remove %s: %s, skipping file",
859 PL_oldname, Strerror(errno) );
865 Perl_croak(aTHX_ "Can't do inplace edit without backup");
869 sv_setpvn(sv,">",!PL_inplace);
870 sv_catpvn(sv,PL_oldname,oldlen);
871 SETERRNO(0,0); /* in case sprintf set errno */
873 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
874 PL_inplace!=0,O_WRONLY|O_CREAT|O_TRUNC,0,NULL))
876 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
877 PL_inplace!=0,O_WRONLY|O_CREAT|OPEN_EXCL,0666,
881 if (ckWARN_d(WARN_INPLACE))
882 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
883 PL_oldname, Strerror(errno) );
887 setdefout(PL_argvoutgv);
888 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
889 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
891 (void)fchmod(PL_lastfd,PL_filemode);
893 # if !(defined(WIN32) && defined(__BORLANDC__))
894 /* Borland runtime creates a readonly file! */
895 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
898 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
900 (void)fchown(PL_lastfd,fileuid,filegid);
903 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
908 return IoIFP(GvIOp(gv));
911 if (ckWARN_d(WARN_INPLACE)) {
912 const int eno = errno;
913 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
914 && !S_ISREG(PL_statbuf.st_mode))
916 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
917 "Can't do inplace edit: %s is not a regular file",
921 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
922 PL_oldname, Strerror(eno));
926 if (io && (IoFLAGS(io) & IOf_ARGV))
927 IoFLAGS(io) |= IOf_START;
929 (void)do_close(PL_argvoutgv,FALSE);
930 if (io && (IoFLAGS(io) & IOf_ARGV)
931 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
933 GV *oldout = (GV*)av_pop(PL_argvout_stack);
935 SvREFCNT_dec(oldout);
938 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
943 /* explicit renamed to avoid C++ conflict -- kja */
945 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
953 if (!gv || SvTYPE(gv) != SVt_PVGV) {
955 SETERRNO(EBADF,SS_IVCHAN);
959 if (!io) { /* never opened */
961 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
962 report_evil_fh(gv, io, PL_op->op_type);
963 SETERRNO(EBADF,SS_IVCHAN);
967 retval = io_close(io, not_implicit);
971 IoLINES_LEFT(io) = IoPAGE_LEN(io);
973 IoTYPE(io) = IoTYPE_CLOSED;
978 Perl_io_close(pTHX_ IO *io, bool not_implicit)
984 if (IoTYPE(io) == IoTYPE_PIPE) {
985 const int status = PerlProc_pclose(IoIFP(io));
987 STATUS_NATIVE_CHILD_SET(status);
988 retval = (STATUS_UNIX == 0);
991 retval = (status != -1);
994 else if (IoTYPE(io) == IoTYPE_STD)
997 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
998 const bool prev_err = PerlIO_error(IoOFP(io));
999 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
1000 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
1003 const bool prev_err = PerlIO_error(IoIFP(io));
1004 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1007 IoOFP(io) = IoIFP(io) = NULL;
1009 else if (not_implicit) {
1010 SETERRNO(EBADF,SS_IVCHAN);
1017 Perl_do_eof(pTHX_ GV *gv)
1020 register IO * const io = GvIO(gv);
1024 else if ((IoTYPE(io) == IoTYPE_WRONLY) && ckWARN(WARN_IO))
1025 report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY);
1028 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1029 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1030 return FALSE; /* this is the most usual case */
1034 /* getc and ungetc can stomp on errno */
1035 const int saverrno = errno;
1036 const int ch = PerlIO_getc(IoIFP(io));
1038 (void)PerlIO_ungetc(IoIFP(io),ch);
1045 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1046 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1047 PerlIO_set_cnt(IoIFP(io),-1);
1049 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1050 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
1054 return TRUE; /* normal fp, definitely end of file */
1060 Perl_do_tell(pTHX_ GV *gv)
1063 register IO *io = NULL;
1064 register PerlIO *fp;
1066 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1067 #ifdef ULTRIX_STDIO_BOTCH
1069 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1071 return PerlIO_tell(fp);
1073 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1074 report_evil_fh(gv, io, PL_op->op_type);
1075 SETERRNO(EBADF,RMS_IFI);
1080 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1083 register IO *io = NULL;
1084 register PerlIO *fp;
1086 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1087 #ifdef ULTRIX_STDIO_BOTCH
1089 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1091 return PerlIO_seek(fp, pos, whence) >= 0;
1093 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1094 report_evil_fh(gv, io, PL_op->op_type);
1095 SETERRNO(EBADF,RMS_IFI);
1100 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1103 register IO *io = NULL;
1104 register PerlIO *fp;
1106 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
1107 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1108 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1109 report_evil_fh(gv, io, PL_op->op_type);
1110 SETERRNO(EBADF,RMS_IFI);
1115 Perl_mode_from_discipline(pTHX_ SV *discp)
1117 int mode = O_BINARY;
1120 const char *s = SvPV_const(discp,len);
1125 if (s[2] == 'a' && s[3] == 'w'
1126 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1135 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1136 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1145 goto fail_discipline;
1148 else if (isSPACE(*s)) {
1155 end = strchr(s+1, ':');
1158 #ifndef PERLIO_LAYERS
1159 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1170 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1172 my_chsize(int fd, Off_t length)
1175 /* code courtesy of William Kucharski */
1181 if (PerlLIO_fstat(fd, &filebuf) < 0)
1184 if (filebuf.st_size < length) {
1186 /* extend file length */
1188 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1191 /* write a "0" byte */
1193 if ((PerlLIO_write(fd, "", 1)) != 1)
1197 /* truncate length */
1201 fl.l_start = length;
1202 fl.l_type = F_WRLCK; /* write lock on file space */
1205 * This relies on the UNDOCUMENTED F_FREESP argument to
1206 * fcntl(2), which truncates the file so that it ends at the
1207 * position indicated by fl.l_start.
1209 * Will minor miracles never cease?
1212 if (fcntl(fd, F_FREESP, &fl) < 0)
1218 Perl_croak_nocontext("truncate not implemented");
1219 #endif /* F_FREESP */
1222 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1225 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1228 register const char *tmps;
1231 /* assuming fp is checked earlier */
1234 switch (SvTYPE(sv)) {
1236 if (ckWARN(WARN_UNINITIALIZED))
1243 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1245 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1246 return !PerlIO_error(fp);
1250 if (PerlIO_isutf8(fp)) {
1252 sv_utf8_upgrade_flags(sv = sv_mortalcopy(sv),
1253 SV_GMAGIC|SV_UTF8_NO_ENCODING);
1255 else if (DO_UTF8(sv)) {
1256 if (!sv_utf8_downgrade((sv = sv_mortalcopy(sv)), TRUE)
1257 && ckWARN_d(WARN_UTF8))
1259 Perl_warner(aTHX_ packWARN(WARN_UTF8), "Wide character in print");
1262 tmps = SvPV_const(sv, len);
1265 /* To detect whether the process is about to overstep its
1266 * filesize limit we would need getrlimit(). We could then
1267 * also transparently raise the limit with setrlimit() --
1268 * but only until the system hard limit/the filesystem limit,
1269 * at which we would get EPERM. Note that when using buffered
1270 * io the write failure can be delayed until the flush/close. --jhi */
1271 if (len && (PerlIO_write(fp,tmps,len) == 0))
1273 return !PerlIO_error(fp);
1284 if (PL_op->op_flags & OPf_REF) {
1289 if (io && IoIFP(io)) {
1291 sv_setpvn(PL_statname,"", 0);
1292 PL_laststype = OP_STAT;
1293 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1297 return PL_laststatval;
1298 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1299 report_evil_fh(gv, io, PL_op->op_type);
1301 sv_setpvn(PL_statname,"", 0);
1302 return (PL_laststatval = -1);
1305 else if (PL_op->op_private & OPpFT_STACKED) {
1306 return PL_laststatval;
1309 SV* const sv = POPs;
1313 if (SvTYPE(sv) == SVt_PVGV) {
1317 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1322 s = SvPV_const(sv, len);
1324 sv_setpvn(PL_statname, s, len);
1325 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1326 PL_laststype = OP_STAT;
1327 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1328 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1329 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1330 return PL_laststatval;
1339 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
1342 if (PL_op->op_flags & OPf_REF) {
1344 if (cGVOP_gv == PL_defgv) {
1345 if (PL_laststype != OP_LSTAT)
1346 Perl_croak(aTHX_ no_prev_lstat);
1347 return PL_laststatval;
1349 if (ckWARN(WARN_IO)) {
1350 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1352 return (PL_laststatval = -1);
1355 else if (PL_laststype != OP_LSTAT
1356 && (PL_op->op_private & OPpFT_STACKED) && ckWARN(WARN_IO))
1357 Perl_croak(aTHX_ no_prev_lstat);
1359 PL_laststype = OP_LSTAT;
1363 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV && ckWARN(WARN_IO)) {
1364 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1365 GvENAME((GV*) SvRV(sv)));
1366 return (PL_laststatval = -1);
1368 /* XXX Do really need to be calling SvPV() all these times? */
1369 sv_setpv(PL_statname,SvPV_nolen_const(sv));
1370 PL_laststatval = PerlLIO_lstat(SvPV_nolen_const(sv),&PL_statcache);
1371 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV_nolen_const(sv), '\n'))
1372 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1373 return PL_laststatval;
1377 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1378 int fd, int do_report)
1381 #if defined(MACOS_TRADITIONAL) || defined(__SYMBIAN32__)
1382 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1386 const char *tmps = NULL;
1387 Newx(PL_Argv, sp - mark + 1, char*);
1390 while (++mark <= sp) {
1392 *a++ = (char*)SvPV_nolen_const(*mark);
1398 tmps = SvPV_nolen_const(really);
1399 if ((!really && *PL_Argv[0] != '/') ||
1400 (really && *tmps != '/')) /* will execvp use PATH? */
1401 TAINT_ENV(); /* testing IFS here is overkill, probably */
1403 if (really && *tmps)
1404 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1406 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1408 if (ckWARN(WARN_EXEC))
1409 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1410 (really ? tmps : PL_Argv[0]), Strerror(errno));
1412 const int e = errno;
1414 PerlLIO_write(fd, (void*)&e, sizeof(int));
1424 Perl_do_execfree(pTHX)
1433 #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
1436 Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
1443 /* Make a copy so we can change it */
1444 const int cmdlen = strlen(incmd);
1445 Newx(cmd, cmdlen+1, char);
1446 strncpy(cmd, incmd, cmdlen);
1449 while (*cmd && isSPACE(*cmd))
1452 /* save an extra exec if possible */
1456 char flags[PERL_FLAGS_MAX];
1457 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1458 strnEQ(cmd+PL_cshlen," -c",3)) {
1460 strlcpy(flags, "-c", PERL_FLAGS_MAX);
1464 s = cmd+PL_cshlen+3;
1468 strlcat(flags, "f", PERL_FLAGS_MAX);
1476 char * const ncmd = s;
1482 if (s[-1] == '\'') {
1485 PerlProc_execl(PL_cshname,"csh", flags, ncmd, (char*)0);
1496 /* see if there are shell metacharacters in it */
1498 if (*cmd == '.' && isSPACE(cmd[1]))
1501 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1504 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
1508 for (s = cmd; *s; s++) {
1509 if (*s != ' ' && !isALPHA(*s) &&
1510 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1511 if (*s == '\n' && !s[1]) {
1515 /* handle the 2>&1 construct at the end */
1516 if (*s == '>' && s[1] == '&' && s[2] == '1'
1517 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1518 && (!s[3] || isSPACE(s[3])))
1520 const char *t = s + 3;
1522 while (*t && isSPACE(*t))
1524 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1531 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1538 Newx(PL_Argv, (s - cmd) / 2 + 2, char*);
1539 PL_Cmd = savepvn(cmd, s-cmd);
1541 for (s = PL_Cmd; *s;) {
1542 while (*s && isSPACE(*s)) s++;
1545 while (*s && !isSPACE(*s)) s++;
1552 PerlProc_execvp(PL_Argv[0],PL_Argv);
1554 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1558 if (ckWARN(WARN_EXEC))
1559 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1560 PL_Argv[0], Strerror(errno));
1562 const int e = errno;
1563 PerlLIO_write(fd, (const void*)&e, sizeof(int));
1572 #endif /* OS2 || WIN32 */
1575 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1579 register I32 tot = 0;
1580 const char *const what = PL_op_name[type];
1582 SV ** const oldmark = mark;
1584 /* Doing this ahead of the switch statement preserves the old behaviour,
1585 where attempting to use kill as a taint test test would fail on
1586 platforms where kill was not defined. */
1588 if (type == OP_KILL)
1589 Perl_die(aTHX_ PL_no_func, what);
1592 if (type == OP_CHOWN)
1593 Perl_die(aTHX_ PL_no_func, what);
1597 #define APPLY_TAINT_PROPER() \
1599 if (PL_tainted) { TAINT_PROPER(what); } \
1602 /* This is a first heuristic; it doesn't catch tainting magic. */
1604 while (++mark <= sp) {
1605 if (SvTAINTED(*mark)) {
1614 APPLY_TAINT_PROPER();
1617 APPLY_TAINT_PROPER();
1619 while (++mark <= sp) {
1621 if (SvTYPE(*mark) == SVt_PVGV) {
1624 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1626 APPLY_TAINT_PROPER();
1627 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1630 Perl_die(aTHX_ PL_no_func, "fchmod");
1637 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1638 gv = (GV*)SvRV(*mark);
1642 const char *name = SvPV_nolen_const(*mark);
1643 APPLY_TAINT_PROPER();
1644 if (PerlLIO_chmod(name, val))
1652 APPLY_TAINT_PROPER();
1653 if (sp - mark > 2) {
1655 val = SvIVx(*++mark);
1656 val2 = SvIVx(*++mark);
1657 APPLY_TAINT_PROPER();
1659 while (++mark <= sp) {
1661 if (SvTYPE(*mark) == SVt_PVGV) {
1664 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1666 APPLY_TAINT_PROPER();
1667 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1670 Perl_die(aTHX_ PL_no_func, "fchown");
1677 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1678 gv = (GV*)SvRV(*mark);
1682 const char *name = SvPV_nolen_const(*mark);
1683 APPLY_TAINT_PROPER();
1684 if (PerlLIO_chown(name, val, val2))
1692 XXX Should we make lchown() directly available from perl?
1693 For now, we'll let Configure test for HAS_LCHOWN, but do
1694 nothing in the core.
1699 APPLY_TAINT_PROPER();
1702 s = SvPVx_nolen_const(*++mark);
1704 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1706 if ((val = whichsig(s)) < 0)
1707 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1711 APPLY_TAINT_PROPER();
1714 /* kill() doesn't do process groups (job trees?) under VMS */
1715 if (val < 0) val = -val;
1716 if (val == SIGKILL) {
1717 # include <starlet.h>
1718 /* Use native sys$delprc() to insure that target process is
1719 * deleted; supervisor-mode images don't pay attention to
1720 * CRTL's emulation of Unix-style signals and kill()
1722 while (++mark <= sp) {
1723 I32 proc = SvIVx(*mark);
1724 register unsigned long int __vmssts;
1725 APPLY_TAINT_PROPER();
1726 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1730 case SS$_NOSUCHNODE:
1731 SETERRNO(ESRCH,__vmssts);
1734 SETERRNO(EPERM,__vmssts);
1737 SETERRNO(EVMSERR,__vmssts);
1746 while (++mark <= sp) {
1747 const I32 proc = SvIVx(*mark);
1748 APPLY_TAINT_PROPER();
1750 if (PerlProc_killpg(proc,val)) /* BSD */
1752 if (PerlProc_kill(-proc,val)) /* SYSV */
1758 while (++mark <= sp) {
1759 const I32 proc = SvIVx(*mark);
1760 APPLY_TAINT_PROPER();
1761 if (PerlProc_kill(proc, val))
1768 APPLY_TAINT_PROPER();
1770 while (++mark <= sp) {
1771 s = SvPV_nolen_const(*mark);
1772 APPLY_TAINT_PROPER();
1773 if (PL_euid || PL_unsafe) {
1777 else { /* don't let root wipe out directories without -U */
1778 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1787 #if defined(HAS_UTIME) || defined(HAS_FUTIMES)
1789 APPLY_TAINT_PROPER();
1790 if (sp - mark > 2) {
1791 #if defined(HAS_FUTIMES)
1792 struct timeval utbuf[2];
1793 void *utbufp = utbuf;
1794 #elif defined(I_UTIME) || defined(VMS)
1795 struct utimbuf utbuf;
1796 struct utimbuf *utbufp = &utbuf;
1802 void *utbufp = &utbuf;
1805 SV* const accessed = *++mark;
1806 SV* const modified = *++mark;
1808 /* Be like C, and if both times are undefined, let the C
1809 * library figure out what to do. This usually means
1810 * "current time". */
1812 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
1815 Zero(&utbuf, sizeof utbuf, char);
1817 utbuf[0].tv_sec = (long)SvIVx(accessed); /* time accessed */
1818 utbuf[0].tv_usec = 0;
1819 utbuf[1].tv_sec = (long)SvIVx(modified); /* time modified */
1820 utbuf[1].tv_usec = 0;
1821 #elif defined(BIG_TIME)
1822 utbuf.actime = (Time_t)SvNVx(accessed); /* time accessed */
1823 utbuf.modtime = (Time_t)SvNVx(modified); /* time modified */
1825 utbuf.actime = (Time_t)SvIVx(accessed); /* time accessed */
1826 utbuf.modtime = (Time_t)SvIVx(modified); /* time modified */
1829 APPLY_TAINT_PROPER();
1831 while (++mark <= sp) {
1833 if (SvTYPE(*mark) == SVt_PVGV) {
1836 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1838 APPLY_TAINT_PROPER();
1839 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))), utbufp))
1842 Perl_die(aTHX_ PL_no_func, "futimes");
1849 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1850 gv = (GV*)SvRV(*mark);
1854 const char * const name = SvPV_nolen_const(*mark);
1855 APPLY_TAINT_PROPER();
1857 if (utimes(name, utbufp))
1859 if (PerlLIO_utime(name, utbufp))
1873 #undef APPLY_TAINT_PROPER
1876 /* Do the permissions allow some operation? Assumes statcache already set. */
1877 #ifndef VMS /* VMS' cando is in vms.c */
1879 Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp)
1880 /* effective is a flag, true for EUID, or for checking if the effective gid
1881 * is in the list of groups returned from getgroups().
1886 /* [Comments and code from Len Reed]
1887 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1888 * to write-protected files. The execute permission bit is set
1889 * by the Miscrosoft C library stat() function for the following:
1894 * All files and directories are readable.
1895 * Directories and special files, e.g. "CON", cannot be
1897 * [Comment by Tom Dinger -- a directory can have the write-protect
1898 * bit set in the file system, but DOS permits changes to
1899 * the directory anyway. In addition, all bets are off
1900 * here for networked software, such as Novell and
1904 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1905 * too so it will actually look into the files for magic numbers
1907 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1909 #else /* ! DOSISH */
1910 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1911 if (mode == S_IXUSR) {
1912 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1916 return TRUE; /* root reads and writes anything */
1919 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1920 if (statbufp->st_mode & mode)
1921 return TRUE; /* ok as "user" */
1923 else if (ingroup(statbufp->st_gid,effective)) {
1924 if (statbufp->st_mode & mode >> 3)
1925 return TRUE; /* ok as "group" */
1927 else if (statbufp->st_mode & mode >> 6)
1928 return TRUE; /* ok as "other" */
1930 #endif /* ! DOSISH */
1935 Perl_ingroup(pTHX_ Gid_t testgid, bool effective)
1937 #ifdef MACOS_TRADITIONAL
1938 /* This is simply not correct for AppleShare, but fix it yerself. */
1942 if (testgid == (effective ? PL_egid : PL_gid))
1944 #ifdef HAS_GETGROUPS
1946 Groups_t *gary = NULL;
1950 anum = getgroups(0, gary);
1951 Newx(gary, anum, Groups_t);
1952 anum = getgroups(anum, gary);
1954 if (gary[anum] == testgid) {
1968 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1971 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1974 const key_t key = (key_t)SvNVx(*++mark);
1975 const I32 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1976 const I32 flags = SvIVx(*++mark);
1978 PERL_UNUSED_ARG(sp);
1985 return msgget(key, flags);
1989 return semget(key, n, flags);
1993 return shmget(key, n, flags);
1995 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1997 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2000 return -1; /* should never happen */
2004 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
2009 const I32 id = SvIVx(*++mark);
2010 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_UNUSED_ARG(sp);
2022 if (cmd == IPC_STAT || cmd == IPC_SET)
2023 infosize = sizeof(struct msqid_ds);
2028 if (cmd == IPC_STAT || cmd == IPC_SET)
2029 infosize = sizeof(struct shmid_ds);
2035 if (cmd == IPC_STAT || cmd == IPC_SET)
2036 infosize = sizeof(struct semid_ds);
2037 else if (cmd == GETALL || cmd == SETALL)
2039 struct semid_ds semds;
2041 #ifdef EXTRA_F_IN_SEMUN_BUF
2042 semun.buff = &semds;
2046 getinfo = (cmd == GETALL);
2047 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2049 infosize = semds.sem_nsems * sizeof(short);
2050 /* "short" is technically wrong but much more portable
2051 than guessing about u_?short(_t)? */
2054 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2058 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2060 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2068 SvPV_force_nolen(astr);
2069 a = SvGROW(astr, infosize+1);
2074 a = SvPV(astr, len);
2075 if (len != infosize)
2076 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2084 const IV i = SvIV(astr);
2085 a = INT2PTR(char *,i); /* ouch */
2092 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2098 union semun unsemds;
2100 #ifdef EXTRA_F_IN_SEMUN_BUF
2101 unsemds.buff = (struct semid_ds *)a;
2103 unsemds.buf = (struct semid_ds *)a;
2105 ret = Semctl(id, n, cmd, unsemds);
2107 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2114 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2118 if (getinfo && ret >= 0) {
2119 SvCUR_set(astr, infosize);
2120 *SvEND(astr) = '\0';
2127 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2132 const I32 id = SvIVx(*++mark);
2133 SV * const mstr = *++mark;
2134 const I32 flags = SvIVx(*++mark);
2135 const char * const mbuf = SvPV_const(mstr, len);
2136 const I32 msize = len - sizeof(long);
2138 PERL_UNUSED_ARG(sp);
2141 Perl_croak(aTHX_ "Arg too short for msgsnd");
2143 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2145 Perl_croak(aTHX_ "msgsnd not implemented");
2150 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2156 I32 msize, flags, ret;
2157 const I32 id = SvIVx(*++mark);
2158 SV * const mstr = *++mark;
2159 PERL_UNUSED_ARG(sp);
2161 /* suppress warning when reading into undef var --jhi */
2163 sv_setpvn(mstr, "", 0);
2164 msize = SvIVx(*++mark);
2165 mtype = (long)SvIVx(*++mark);
2166 flags = SvIVx(*++mark);
2167 SvPV_force_nolen(mstr);
2168 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2171 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2173 SvCUR_set(mstr, sizeof(long)+ret);
2174 *SvEND(mstr) = '\0';
2175 #ifndef INCOMPLETE_TAINTS
2176 /* who knows who has been playing with this message? */
2182 Perl_croak(aTHX_ "msgrcv not implemented");
2187 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2192 const I32 id = SvIVx(*++mark);
2193 SV * const opstr = *++mark;
2194 const char * const opbuf = SvPV_const(opstr, opsize);
2195 PERL_UNUSED_ARG(sp);
2197 if (opsize < 3 * SHORTSIZE
2198 || (opsize % (3 * SHORTSIZE))) {
2199 SETERRNO(EINVAL,LIB_INVARG);
2203 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2205 const int nsops = opsize / (3 * sizeof (short));
2207 short * const ops = (short *) opbuf;
2209 struct sembuf *temps, *t;
2212 Newx (temps, nsops, struct sembuf);
2220 result = semop(id, temps, nsops);
2234 Perl_croak(aTHX_ "semop not implemented");
2239 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2244 struct shmid_ds shmds;
2245 const I32 id = SvIVx(*++mark);
2246 SV * const mstr = *++mark;
2247 const I32 mpos = SvIVx(*++mark);
2248 const I32 msize = SvIVx(*++mark);
2249 PERL_UNUSED_ARG(sp);
2252 if (shmctl(id, IPC_STAT, &shmds) == -1)
2254 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
2255 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2258 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2259 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2261 if (optype == OP_SHMREAD) {
2263 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2265 sv_setpvn(mstr, "", 0);
2266 SvPV_force_nolen(mstr);
2267 mbuf = SvGROW(mstr, msize+1);
2269 Copy(shm + mpos, mbuf, msize, char);
2270 SvCUR_set(mstr, msize);
2271 *SvEND(mstr) = '\0';
2273 #ifndef INCOMPLETE_TAINTS
2274 /* who knows who has been playing with this shared memory? */
2282 const char *mbuf = SvPV_const(mstr, len);
2283 if ((n = len) > msize)
2285 Copy(mbuf, shm + mpos, n, char);
2287 memzero(shm + mpos + n, msize - n);
2291 Perl_croak(aTHX_ "shm I/O not implemented");
2295 #endif /* SYSV IPC */
2300 =for apidoc start_glob
2302 Function called by C<do_readline> to spawn a glob (or do the glob inside
2303 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2304 this glob starter is only used by miniperl during the build process.
2305 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2311 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2314 SV * const tmpcmd = newSV(0);
2318 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2319 /* since spawning off a process is a real performance hit */
2326 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
2329 #ifdef MACOS_TRADITIONAL
2330 sv_setpv(tmpcmd, "glob ");
2331 sv_catsv(tmpcmd, tmpglob);
2332 sv_catpv(tmpcmd, " |");
2336 sv_setpv(tmpcmd, "for a in ");
2337 sv_catsv(tmpcmd, tmpglob);
2338 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2341 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2342 sv_catsv(tmpcmd, tmpglob);
2344 sv_setpv(tmpcmd, "perlglob ");
2345 sv_catsv(tmpcmd, tmpglob);
2346 sv_catpv(tmpcmd, " |");
2351 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2352 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2353 sv_catsv(tmpcmd, tmpglob);
2354 sv_catpv(tmpcmd, "' 2>/dev/null |");
2356 sv_setpv(tmpcmd, "echo ");
2357 sv_catsv(tmpcmd, tmpglob);
2359 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2361 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2364 #endif /* !DOSISH */
2365 #endif /* MACOS_TRADITIONAL */
2366 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2367 FALSE, O_RDONLY, 0, NULL);
2376 * c-indentation-style: bsd
2378 * indent-tabs-mode: t
2381 * ex: set ts=8 sts=4 sw=4 noet: