3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 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_open(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
63 int rawmode, int rawperm, PerlIO *supplied_fp)
65 return do_openn(gv, name, len, as_raw, rawmode, rawperm,
66 supplied_fp, (SV **) NULL, 0);
70 Perl_do_open9(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
71 int rawmode, int rawperm, PerlIO *supplied_fp, SV *svs,
75 return do_openn(gv, name, len, as_raw, rawmode, rawperm,
76 supplied_fp, &svs, 1);
80 Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
81 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
85 register IO *io = GvIOn(gv);
86 PerlIO *saveifp = Nullfp;
87 PerlIO *saveofp = Nullfp;
89 char savetype = IoTYPE_CLOSED;
94 bool was_fdopen = FALSE;
95 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
97 char mode[PERL_MODE_MAX]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */
100 Zero(mode,sizeof(mode),char);
101 PL_forkprocess = 1; /* assume true if no fork */
103 /* Collect default raw/crlf info from the op */
104 if (PL_op && PL_op->op_type == OP_OPEN) {
105 /* set up IO layers */
106 const U8 flags = PL_op->op_private;
107 in_raw = (flags & OPpOPEN_IN_RAW);
108 in_crlf = (flags & OPpOPEN_IN_CRLF);
109 out_raw = (flags & OPpOPEN_OUT_RAW);
110 out_crlf = (flags & OPpOPEN_OUT_CRLF);
113 /* If currently open - close before we re-open */
115 fd = PerlIO_fileno(IoIFP(io));
116 if (IoTYPE(io) == IoTYPE_STD) {
117 /* This is a clone of one of STD* handles */
120 else if (fd >= 0 && fd <= PL_maxsysfd) {
121 /* This is one of the original STD* handles */
124 savetype = IoTYPE(io);
128 else if (IoTYPE(io) == IoTYPE_PIPE)
129 result = PerlProc_pclose(IoIFP(io));
130 else if (IoIFP(io) != IoOFP(io)) {
132 result = PerlIO_close(IoOFP(io));
133 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
136 result = PerlIO_close(IoIFP(io));
139 result = PerlIO_close(IoIFP(io));
140 if (result == EOF && fd > PL_maxsysfd) {
141 /* Why is this not Perl_warn*() call ? */
142 PerlIO_printf(Perl_error_log,
143 "Warning: unable to close filehandle %s properly.\n",
146 IoOFP(io) = IoIFP(io) = Nullfp;
150 /* sysopen style args, i.e. integer mode and permissions */
152 const int appendtrunc =
154 #ifdef O_APPEND /* Not fully portable. */
157 #ifdef O_TRUNC /* Not fully portable. */
161 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
165 Perl_croak(aTHX_ "panic: sysopen with multiple args");
173 It might be (in OS/390 and Mac OS Classic it is)
179 This means that simple & with O_RDWR would look
180 like O_RDONLY is present. Therefore we have to
183 if ((ismodifying = (rawmode & modifyingmode))) {
184 if ((ismodifying & O_WRONLY) == O_WRONLY ||
185 (ismodifying & O_RDWR) == O_RDWR ||
186 (ismodifying & (O_CREAT|appendtrunc)))
187 TAINT_PROPER("sysopen");
189 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
191 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
192 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
195 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
197 namesv = sv_2mortal(newSVpvn(name,strlen(name)));
201 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
204 /* Regular (non-sys) open */
209 PerlIO *that_fp = NULL;
211 type = savepvn(name, len);
215 /* Lose leading and trailing white space */
216 for (; isSPACE(*type); type++) ;
217 while (tend > type && isSPACE(tend[-1]))
221 /* New style explicit name, type is just mode and layer info */
223 if (SvROK(*svp) && !strchr(name,'&')) {
225 Perl_warner(aTHX_ packWARN(WARN_IO),
226 "Can't open a reference");
227 SETERRNO(EINVAL, LIB_INVARG);
230 #endif /* USE_STDIO */
231 name = SvOK(*svp) ? savesvpv (*svp) : savepvn ("", 0);
239 if ((*type == IoTYPE_RDWR) && /* scary */
240 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
241 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
242 TAINT_PROPER("open");
247 if (*type == IoTYPE_PIPE) {
249 if (type[1] != IoTYPE_STD) {
251 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
255 for (type++; isSPACE(*type); type++) ;
261 /* command is missing 19990114 */
262 if (ckWARN(WARN_PIPE))
263 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
267 if ((*name == '-' && name[1] == '\0') || num_svs)
269 TAINT_PROPER("piped open");
270 if (!num_svs && name[len-1] == '|') {
272 if (ckWARN(WARN_PIPE))
273 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
279 strlcat(mode, "b", PERL_MODE_MAX);
281 strlcat(mode, "t", PERL_MODE_MAX);
289 fp = PerlProc_popen_list(mode, num_svs, svp);
292 fp = PerlProc_popen(name,mode);
296 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
302 else if (*type == IoTYPE_WRONLY) {
303 TAINT_PROPER("open");
305 if (*type == IoTYPE_WRONLY) {
306 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
307 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
317 strlcat(mode, "b", PERL_MODE_MAX);
319 strlcat(mode, "t", PERL_MODE_MAX);
328 dodup = PERLIO_DUP_FD;
334 if (!num_svs && !*type && supplied_fp) {
335 /* "<+&" etc. is used by typemaps */
340 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
342 for (; isSPACE(*type); type++) ;
343 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
347 else if (isDIGIT(*type)) {
353 thatio = sv_2io(*svp);
357 thatgv = gv_fetchpv(type,FALSE,SVt_PVIO);
358 thatio = GvIO(thatgv);
362 SETERRNO(EINVAL,SS_IVCHAN);
366 if ((that_fp = IoIFP(thatio))) {
367 /* Flush stdio buffer before dup. --mjd
368 * Unfortunately SEEK_CURing 0 seems to
369 * be optimized away on most platforms;
370 * only Solaris and Linux seem to flush
373 /* sfio fails to clear error on next
374 sfwrite, contrary to documentation.
376 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
377 PerlIO_clearerr(that_fp);
379 /* On the other hand, do all platforms
380 * take gracefully to flushing a read-only
381 * filehandle? Perhaps we should do
382 * fsetpos(src)+fgetpos(dst)? --nik */
383 PerlIO_flush(that_fp);
384 fd = PerlIO_fileno(that_fp);
385 /* When dup()ing STDIN, STDOUT or STDERR
386 * explicitly set appropriate access mode */
387 if (that_fp == PerlIO_stdout()
388 || that_fp == PerlIO_stderr())
389 IoTYPE(io) = IoTYPE_WRONLY;
390 else if (that_fp == PerlIO_stdin())
391 IoTYPE(io) = IoTYPE_RDONLY;
392 /* When dup()ing a socket, say result is
394 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
395 IoTYPE(io) = IoTYPE_SOCKET;
403 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
407 fd = PerlLIO_dup(fd);
410 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
418 for (; isSPACE(*type); type++) ;
419 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
421 fp = PerlIO_stdout();
422 IoTYPE(io) = IoTYPE_STD;
424 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
429 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
434 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
437 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
438 goto unknown_open_mode;
439 } /* IoTYPE_WRONLY */
440 else if (*type == IoTYPE_RDONLY) {
441 for (type++; isSPACE(*type); type++) ;
445 strlcat(mode, "b", PERL_MODE_MAX);
447 strlcat(mode, "t", PERL_MODE_MAX);
457 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
460 IoTYPE(io) = IoTYPE_STD;
462 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
467 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
472 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
474 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
475 goto unknown_open_mode;
476 } /* IoTYPE_RDONLY */
477 else if ((num_svs && /* '-|...' or '...|' */
478 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
479 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
481 type += 2; /* skip over '-|' */
485 while (tend > type && isSPACE(tend[-1]))
487 for (; isSPACE(*type); type++)
493 /* command is missing 19990114 */
494 if (ckWARN(WARN_PIPE))
495 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
499 if (!(*name == '-' && name[1] == '\0') || num_svs)
501 TAINT_PROPER("piped open");
506 strlcat(mode, "b", PERL_MODE_MAX);
508 strlcat(mode, "t", PERL_MODE_MAX);
517 fp = PerlProc_popen_list(mode,num_svs,svp);
520 fp = PerlProc_popen(name,mode);
522 IoTYPE(io) = IoTYPE_PIPE;
524 for (; isSPACE(*type); type++) ;
526 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
532 else { /* layer(Args) */
534 goto unknown_open_mode;
536 IoTYPE(io) = IoTYPE_RDONLY;
537 for (; isSPACE(*name); name++)
543 strlcat(mode, "b", PERL_MODE_MAX);
545 strlcat(mode, "t", PERL_MODE_MAX);
553 if (*name == '-' && name[1] == '\0') {
555 IoTYPE(io) = IoTYPE_STD;
559 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
564 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
569 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == IoTYPE_RDONLY && strchr(name, '\n'))
570 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
574 if (ckWARN(WARN_IO)) {
575 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
576 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
577 Perl_warner(aTHX_ packWARN(WARN_IO),
578 "Filehandle STD%s reopened as %s only for input",
579 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
582 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
583 Perl_warner(aTHX_ packWARN(WARN_IO),
584 "Filehandle STDIN reopened as %s only for output",
589 fd = PerlIO_fileno(fp);
590 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
591 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
592 * type probe for socket-ness.
594 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
595 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
596 /* If PerlIO claims to have fd we had better be able to fstat() it. */
597 (void) PerlIO_close(fp);
601 if (S_ISSOCK(PL_statbuf.st_mode))
602 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
606 !(PL_statbuf.st_mode & S_IFMT)
610 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
611 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
612 ) { /* on OS's that return 0 on fstat()ed pipe */
614 Sock_size_t buflen = sizeof tmpbuf;
615 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
616 || errno != ENOTSOCK)
617 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
618 /* but some return 0 for streams too, sigh */
620 #endif /* HAS_SOCKET */
621 #endif /* !PERL_MICRO */
625 * If this is a standard handle we discard all the layer stuff
626 * and just dup the fd into whatever was on the handle before !
629 if (saveifp) { /* must use old fp? */
630 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
631 then dup the new fileno down
634 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
635 if (saveofp != saveifp) { /* was a socket? */
636 PerlIO_close(saveofp);
640 /* Still a small can-of-worms here if (say) PerlIO::scalar
641 is assigned to (say) STDOUT - for now let dup2() fail
642 and provide the error
644 if (PerlLIO_dup2(fd, savefd) < 0) {
645 (void)PerlIO_close(fp);
649 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
650 char newname[FILENAME_MAX+1];
651 if (PerlIO_getname(fp, newname)) {
652 if (fd == PerlIO_fileno(PerlIO_stdout()))
653 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
654 if (fd == PerlIO_fileno(PerlIO_stderr()))
655 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
661 /* PL_fdpid isn't used on Windows, so avoid this useless work.
662 * XXX Probably the same for a lot of other places. */
668 sv = *av_fetch(PL_fdpid,fd,TRUE);
669 SvUPGRADE(sv, SVt_IV);
672 sv = *av_fetch(PL_fdpid,savefd,TRUE);
673 SvUPGRADE(sv, SVt_IV);
680 /* need to close fp without closing underlying fd */
681 int ofd = PerlIO_fileno(fp);
682 int dupfd = PerlLIO_dup(ofd);
683 #if defined(HAS_FCNTL) && defined(F_SETFD)
684 /* Assume if we have F_SETFD we have F_GETFD */
685 int coe = fcntl(ofd,F_GETFD);
688 PerlLIO_dup2(dupfd,ofd);
689 #if defined(HAS_FCNTL) && defined(F_SETFD)
690 /* The dup trick has lost close-on-exec on ofd */
691 fcntl(ofd,F_SETFD, coe);
693 PerlLIO_close(dupfd);
700 fd = PerlIO_fileno(fp);
702 #if defined(HAS_FCNTL) && defined(F_SETFD)
704 int save_errno = errno;
705 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
711 IoFLAGS(io) &= ~IOf_NOLINE;
713 if (IoTYPE(io) == IoTYPE_SOCKET
714 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
716 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
719 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
733 IoTYPE(io) = savetype;
738 Perl_nextargv(pTHX_ register GV *gv)
741 #ifndef FLEXFILENAMES
750 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
751 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
752 IoFLAGS(io) &= ~IOf_START;
754 if (!PL_argvout_stack)
755 PL_argvout_stack = newAV();
756 av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
759 if (PL_filemode & (S_ISUID|S_ISGID)) {
760 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
763 (void)fchmod(PL_lastfd,PL_filemode);
765 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
772 while (av_len(GvAV(gv)) >= 0) {
774 sv = av_shift(GvAV(gv));
776 sv_setsv(GvSV(gv),sv);
777 SvSETMAGIC(GvSV(gv));
778 PL_oldname = SvPVx(GvSV(gv), oldlen);
779 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
781 TAINT_PROPER("inplace open");
782 if (oldlen == 1 && *PL_oldname == '-') {
783 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
784 return IoIFP(GvIOp(gv));
786 #ifndef FLEXFILENAMES
787 filedev = PL_statbuf.st_dev;
788 fileino = PL_statbuf.st_ino;
790 PL_filemode = PL_statbuf.st_mode;
791 fileuid = PL_statbuf.st_uid;
792 filegid = PL_statbuf.st_gid;
793 if (!S_ISREG(PL_filemode)) {
794 if (ckWARN_d(WARN_INPLACE))
795 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
796 "Can't do inplace edit: %s is not a regular file",
802 char *star = strchr(PL_inplace, '*');
804 char *begin = PL_inplace;
805 sv_setpvn(sv, "", 0);
807 sv_catpvn(sv, begin, star - begin);
808 sv_catpvn(sv, PL_oldname, oldlen);
810 } while ((star = strchr(begin, '*')));
815 sv_catpv(sv,PL_inplace);
817 #ifndef FLEXFILENAMES
818 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
819 && PL_statbuf.st_dev == filedev
820 && PL_statbuf.st_ino == fileino)
822 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
826 if (ckWARN_d(WARN_INPLACE))
827 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
828 "Can't do inplace edit: %"SVf" would not be unique",
835 #if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
836 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
837 if (ckWARN_d(WARN_INPLACE))
838 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
839 "Can't rename %s to %"SVf": %s, skipping file",
840 PL_oldname, sv, Strerror(errno) );
846 (void)PerlLIO_unlink(SvPVX_const(sv));
847 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
848 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),PL_inplace!=0,
852 (void)UNLINK(SvPVX_const(sv));
853 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
854 if (ckWARN_d(WARN_INPLACE))
855 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
856 "Can't rename %s to %"SVf": %s, skipping file",
857 PL_oldname, sv, Strerror(errno) );
861 (void)UNLINK(PL_oldname);
865 #if !defined(DOSISH) && !defined(AMIGAOS)
866 # ifndef VMS /* Don't delete; use automatic file versioning */
867 if (UNLINK(PL_oldname) < 0) {
868 if (ckWARN_d(WARN_INPLACE))
869 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
870 "Can't remove %s: %s, skipping file",
871 PL_oldname, Strerror(errno) );
877 Perl_croak(aTHX_ "Can't do inplace edit without backup");
881 sv_setpvn(sv,">",!PL_inplace);
882 sv_catpvn(sv,PL_oldname,oldlen);
883 SETERRNO(0,0); /* in case sprintf set errno */
885 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
886 PL_inplace!=0,O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
888 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
889 PL_inplace!=0,O_WRONLY|O_CREAT|OPEN_EXCL,0666,
893 if (ckWARN_d(WARN_INPLACE))
894 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
895 PL_oldname, Strerror(errno) );
899 setdefout(PL_argvoutgv);
900 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
901 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
903 (void)fchmod(PL_lastfd,PL_filemode);
905 # if !(defined(WIN32) && defined(__BORLANDC__))
906 /* Borland runtime creates a readonly file! */
907 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
910 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
912 (void)fchown(PL_lastfd,fileuid,filegid);
915 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
920 return IoIFP(GvIOp(gv));
923 if (ckWARN_d(WARN_INPLACE)) {
924 const int eno = errno;
925 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
926 && !S_ISREG(PL_statbuf.st_mode))
928 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
929 "Can't do inplace edit: %s is not a regular file",
933 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
934 PL_oldname, Strerror(eno));
938 if (io && (IoFLAGS(io) & IOf_ARGV))
939 IoFLAGS(io) |= IOf_START;
941 (void)do_close(PL_argvoutgv,FALSE);
942 if (io && (IoFLAGS(io) & IOf_ARGV)
943 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
945 GV *oldout = (GV*)av_pop(PL_argvout_stack);
947 SvREFCNT_dec(oldout);
950 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
957 Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
976 if (PerlProc_pipe(fd) < 0)
978 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r"PIPE_OPEN_MODE);
979 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w"PIPE_OPEN_MODE);
980 IoOFP(rstio) = IoIFP(rstio);
981 IoIFP(wstio) = IoOFP(wstio);
982 IoTYPE(rstio) = IoTYPE_RDONLY;
983 IoTYPE(wstio) = IoTYPE_WRONLY;
984 if (!IoIFP(rstio) || !IoOFP(wstio)) {
985 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
986 else PerlLIO_close(fd[0]);
987 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
988 else PerlLIO_close(fd[1]);
992 sv_setsv(sv,&PL_sv_yes);
996 sv_setsv(sv,&PL_sv_undef);
1001 /* explicit renamed to avoid C++ conflict -- kja */
1003 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
1010 if (!gv || SvTYPE(gv) != SVt_PVGV) {
1012 SETERRNO(EBADF,SS_IVCHAN);
1016 if (!io) { /* never opened */
1018 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
1019 report_evil_fh(gv, io, PL_op->op_type);
1020 SETERRNO(EBADF,SS_IVCHAN);
1024 retval = io_close(io, not_implicit);
1028 IoLINES_LEFT(io) = IoPAGE_LEN(io);
1030 IoTYPE(io) = IoTYPE_CLOSED;
1035 Perl_io_close(pTHX_ IO *io, bool not_implicit)
1037 bool retval = FALSE;
1040 if (IoTYPE(io) == IoTYPE_PIPE) {
1041 const int status = PerlProc_pclose(IoIFP(io));
1043 STATUS_NATIVE_SET(status);
1044 retval = (STATUS_UNIX == 0);
1047 retval = (status != -1);
1050 else if (IoTYPE(io) == IoTYPE_STD)
1053 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
1054 bool prev_err = PerlIO_error(IoOFP(io));
1055 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
1056 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
1059 bool prev_err = PerlIO_error(IoIFP(io));
1060 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1063 IoOFP(io) = IoIFP(io) = Nullfp;
1065 else if (not_implicit) {
1066 SETERRNO(EBADF,SS_IVCHAN);
1073 Perl_do_eof(pTHX_ GV *gv)
1082 else if (ckWARN(WARN_IO) && (IoTYPE(io) == IoTYPE_WRONLY))
1083 report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY);
1088 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1089 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1090 return FALSE; /* this is the most usual case */
1093 saverrno = errno; /* getc and ungetc can stomp on errno */
1094 ch = PerlIO_getc(IoIFP(io));
1096 (void)PerlIO_ungetc(IoIFP(io),ch);
1102 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1103 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1104 PerlIO_set_cnt(IoIFP(io),-1);
1106 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1107 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
1111 return TRUE; /* normal fp, definitely end of file */
1117 Perl_do_tell(pTHX_ GV *gv)
1119 register IO *io = 0;
1120 register PerlIO *fp;
1122 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1123 #ifdef ULTRIX_STDIO_BOTCH
1125 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1127 return PerlIO_tell(fp);
1129 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1130 report_evil_fh(gv, io, PL_op->op_type);
1131 SETERRNO(EBADF,RMS_IFI);
1136 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1138 register IO *io = 0;
1139 register PerlIO *fp;
1141 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1142 #ifdef ULTRIX_STDIO_BOTCH
1144 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1146 return PerlIO_seek(fp, pos, whence) >= 0;
1148 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1149 report_evil_fh(gv, io, PL_op->op_type);
1150 SETERRNO(EBADF,RMS_IFI);
1155 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1157 register IO *io = 0;
1158 register PerlIO *fp;
1160 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
1161 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1162 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1163 report_evil_fh(gv, io, PL_op->op_type);
1164 SETERRNO(EBADF,RMS_IFI);
1169 Perl_mode_from_discipline(pTHX_ SV *discp)
1171 int mode = O_BINARY;
1174 const char *s = SvPV_const(discp,len);
1179 if (s[2] == 'a' && s[3] == 'w'
1180 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1189 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1190 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1199 goto fail_discipline;
1202 else if (isSPACE(*s)) {
1209 end = strchr(s+1, ':');
1212 #ifndef PERLIO_LAYERS
1213 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1225 Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
1227 /* The old body of this is now in non-LAYER part of perlio.c
1228 * This is a stub for any XS code which might have been calling it.
1230 const char *name = ":raw";
1231 #ifdef PERLIO_USING_CRLF
1232 if (!(mode & O_BINARY))
1235 return PerlIO_binmode(aTHX_ fp, iotype, mode, name);
1238 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1240 my_chsize(int fd, Off_t length)
1243 /* code courtesy of William Kucharski */
1249 if (PerlLIO_fstat(fd, &filebuf) < 0)
1252 if (filebuf.st_size < length) {
1254 /* extend file length */
1256 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1259 /* write a "0" byte */
1261 if ((PerlLIO_write(fd, "", 1)) != 1)
1265 /* truncate length */
1269 fl.l_start = length;
1270 fl.l_type = F_WRLCK; /* write lock on file space */
1273 * This relies on the UNDOCUMENTED F_FREESP argument to
1274 * fcntl(2), which truncates the file so that it ends at the
1275 * position indicated by fl.l_start.
1277 * Will minor miracles never cease?
1280 if (fcntl(fd, F_FREESP, &fl) < 0)
1286 Perl_croak_nocontext("truncate not implemented");
1287 #endif /* F_FREESP */
1290 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1293 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1295 register const char *tmps;
1298 /* assuming fp is checked earlier */
1304 if (SvIOK(sv) && SvIVX(sv) != 0) {
1305 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
1306 return !PerlIO_error(fp);
1308 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
1309 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
1310 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
1311 return !PerlIO_error(fp);
1314 switch (SvTYPE(sv)) {
1316 if (ckWARN(WARN_UNINITIALIZED))
1324 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1326 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1327 return !PerlIO_error(fp);
1331 if (PerlIO_isutf8(fp)) {
1333 sv_utf8_upgrade_flags(sv = sv_mortalcopy(sv),
1334 SV_GMAGIC|SV_UTF8_NO_ENCODING);
1336 else if (DO_UTF8(sv)) {
1337 if (!sv_utf8_downgrade((sv = sv_mortalcopy(sv)), TRUE)
1338 && ckWARN_d(WARN_UTF8))
1340 Perl_warner(aTHX_ packWARN(WARN_UTF8), "Wide character in print");
1343 tmps = SvPV_const(sv, len);
1346 /* To detect whether the process is about to overstep its
1347 * filesize limit we would need getrlimit(). We could then
1348 * also transparently raise the limit with setrlimit() --
1349 * but only until the system hard limit/the filesystem limit,
1350 * at which we would get EPERM. Note that when using buffered
1351 * io the write failure can be delayed until the flush/close. --jhi */
1352 if (len && (PerlIO_write(fp,tmps,len) == 0))
1354 return !PerlIO_error(fp);
1364 if (PL_op->op_flags & OPf_REF) {
1369 if (io && IoIFP(io)) {
1371 sv_setpvn(PL_statname,"", 0);
1372 PL_laststype = OP_STAT;
1373 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1377 return PL_laststatval;
1378 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1379 report_evil_fh(gv, io, PL_op->op_type);
1381 sv_setpvn(PL_statname,"", 0);
1382 return (PL_laststatval = -1);
1385 else if (PL_op->op_private & OPpFT_STACKED) {
1386 return PL_laststatval;
1393 if (SvTYPE(sv) == SVt_PVGV) {
1397 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1402 s = SvPV_const(sv, len);
1404 sv_setpvn(PL_statname, s, len);
1405 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1406 PL_laststype = OP_STAT;
1407 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1408 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1409 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1410 return PL_laststatval;
1414 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
1421 if (PL_op->op_flags & OPf_REF) {
1423 if (cGVOP_gv == PL_defgv) {
1424 if (PL_laststype != OP_LSTAT)
1425 Perl_croak(aTHX_ no_prev_lstat);
1426 return PL_laststatval;
1428 if (ckWARN(WARN_IO)) {
1429 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1431 return (PL_laststatval = -1);
1434 else if (ckWARN(WARN_IO) && PL_laststype != OP_LSTAT
1435 && (PL_op->op_private & OPpFT_STACKED))
1436 Perl_croak(aTHX_ no_prev_lstat);
1438 PL_laststype = OP_LSTAT;
1442 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV && ckWARN(WARN_IO)) {
1443 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1444 GvENAME((GV*) SvRV(sv)));
1445 return (PL_laststatval = -1);
1447 /* XXX Do really need to be calling SvPV() all these times? */
1448 sv_setpv(PL_statname,SvPV_nolen_const(sv));
1449 PL_laststatval = PerlLIO_lstat(SvPV_nolen_const(sv),&PL_statcache);
1450 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV_nolen_const(sv), '\n'))
1451 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1452 return PL_laststatval;
1457 Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1459 return do_aexec5(really, mark, sp, 0, 0);
1464 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1465 int fd, int do_report)
1468 #if defined(MACOS_TRADITIONAL) || defined(SYMBIAN)
1469 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1472 const char *tmps = Nullch;
1475 New(401,PL_Argv, sp - mark + 1, char*);
1477 while (++mark <= sp) {
1479 *a++ = (char*)SvPV_nolen_const(*mark);
1485 tmps = SvPV_nolen_const(really);
1486 if ((!really && *PL_Argv[0] != '/') ||
1487 (really && *tmps != '/')) /* will execvp use PATH? */
1488 TAINT_ENV(); /* testing IFS here is overkill, probably */
1490 if (really && *tmps)
1491 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1493 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1495 if (ckWARN(WARN_EXEC))
1496 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1497 (really ? tmps : PL_Argv[0]), Strerror(errno));
1501 PerlLIO_write(fd, (void*)&e, sizeof(int));
1511 Perl_do_execfree(pTHX)
1515 PL_Argv = Null(char **);
1523 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC) && !defined(SYMBIAN) && !defined(MACOS_TRADITIONAL)
1526 Perl_do_exec(pTHX_ char *cmd)
1528 return do_exec3(cmd,0,0);
1532 Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1538 while (*cmd && isSPACE(*cmd))
1541 /* save an extra exec if possible */
1545 char flags[PERL_FLAGS_MAX];
1546 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1547 strnEQ(cmd+PL_cshlen," -c",3)) {
1549 strlcpy(flags, "-c", PERL_FLAGS_MAX);
1553 s = cmd+PL_cshlen+3;
1557 strlcat(flags, "f", PERL_FLAGS_MAX);
1571 if (s[-1] == '\'') {
1574 PerlProc_execl(PL_cshname,"csh", flags, ncmd, (char*)0);
1584 /* see if there are shell metacharacters in it */
1586 if (*cmd == '.' && isSPACE(cmd[1]))
1589 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1592 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
1596 for (s = cmd; *s; s++) {
1597 if (*s != ' ' && !isALPHA(*s) &&
1598 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1599 if (*s == '\n' && !s[1]) {
1603 /* handle the 2>&1 construct at the end */
1604 if (*s == '>' && s[1] == '&' && s[2] == '1'
1605 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1606 && (!s[3] || isSPACE(s[3])))
1608 const char *t = s + 3;
1610 while (*t && isSPACE(*t))
1612 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1619 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1625 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1626 PL_Cmd = savepvn(cmd, s-cmd);
1628 for (s = PL_Cmd; *s;) {
1629 while (*s && isSPACE(*s)) s++;
1632 while (*s && !isSPACE(*s)) s++;
1639 PerlProc_execvp(PL_Argv[0],PL_Argv);
1641 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1646 if (ckWARN(WARN_EXEC))
1647 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1648 PL_Argv[0], Strerror(errno));
1651 PerlLIO_write(fd, (void*)&e, sizeof(int));
1660 #endif /* OS2 || WIN32 */
1663 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1666 register I32 tot = 0;
1669 SV **oldmark = mark;
1671 #define APPLY_TAINT_PROPER() \
1673 if (PL_tainted) { TAINT_PROPER(what); } \
1676 /* This is a first heuristic; it doesn't catch tainting magic. */
1678 while (++mark <= sp) {
1679 if (SvTAINTED(*mark)) {
1689 APPLY_TAINT_PROPER();
1692 APPLY_TAINT_PROPER();
1694 while (++mark <= sp) {
1695 const char *name = SvPV_nolen_const(*mark);
1696 APPLY_TAINT_PROPER();
1697 if (PerlLIO_chmod(name, val))
1705 APPLY_TAINT_PROPER();
1706 if (sp - mark > 2) {
1708 val = SvIVx(*++mark);
1709 val2 = SvIVx(*++mark);
1710 APPLY_TAINT_PROPER();
1712 while (++mark <= sp) {
1713 const char *name = SvPV_nolen_const(*mark);
1714 APPLY_TAINT_PROPER();
1715 if (PerlLIO_chown(name, val, val2))
1722 XXX Should we make lchown() directly available from perl?
1723 For now, we'll let Configure test for HAS_LCHOWN, but do
1724 nothing in the core.
1730 APPLY_TAINT_PROPER();
1733 s = SvPVx_nolen_const(*++mark);
1735 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1737 if ((val = whichsig(s)) < 0)
1738 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1742 APPLY_TAINT_PROPER();
1745 /* kill() doesn't do process groups (job trees?) under VMS */
1746 if (val < 0) val = -val;
1747 if (val == SIGKILL) {
1748 # include <starlet.h>
1749 /* Use native sys$delprc() to insure that target process is
1750 * deleted; supervisor-mode images don't pay attention to
1751 * CRTL's emulation of Unix-style signals and kill()
1753 while (++mark <= sp) {
1754 I32 proc = SvIVx(*mark);
1755 register unsigned long int __vmssts;
1756 APPLY_TAINT_PROPER();
1757 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1761 case SS$_NOSUCHNODE:
1762 SETERRNO(ESRCH,__vmssts);
1765 SETERRNO(EPERM,__vmssts);
1768 SETERRNO(EVMSERR,__vmssts);
1777 while (++mark <= sp) {
1778 I32 proc = SvIVx(*mark);
1779 APPLY_TAINT_PROPER();
1781 if (PerlProc_killpg(proc,val)) /* BSD */
1783 if (PerlProc_kill(-proc,val)) /* SYSV */
1789 while (++mark <= sp) {
1790 I32 proc = SvIVx(*mark);
1791 APPLY_TAINT_PROPER();
1792 if (PerlProc_kill(proc, val))
1800 APPLY_TAINT_PROPER();
1802 while (++mark <= sp) {
1803 s = SvPV_nolen_const(*mark);
1804 APPLY_TAINT_PROPER();
1805 if (PL_euid || PL_unsafe) {
1809 else { /* don't let root wipe out directories without -U */
1810 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1822 APPLY_TAINT_PROPER();
1823 if (sp - mark > 2) {
1824 #if defined(I_UTIME) || defined(VMS)
1825 struct utimbuf utbuf;
1826 struct utimbuf *utbufp = &utbuf;
1832 void *utbufp = &utbuf;
1835 SV* accessed = *++mark;
1836 SV* modified = *++mark;
1838 /* Be like C, and if both times are undefined, let the C
1839 * library figure out what to do. This usually means
1840 * "current time". */
1842 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
1845 Zero(&utbuf, sizeof utbuf, char);
1847 utbuf.actime = (Time_t)SvNVx(accessed); /* time accessed */
1848 utbuf.modtime = (Time_t)SvNVx(modified); /* time modified */
1850 utbuf.actime = (Time_t)SvIVx(accessed); /* time accessed */
1851 utbuf.modtime = (Time_t)SvIVx(modified); /* time modified */
1854 APPLY_TAINT_PROPER();
1856 while (++mark <= sp) {
1857 const char *name = SvPV_nolen_const(*mark);
1858 APPLY_TAINT_PROPER();
1859 if (PerlLIO_utime(name, utbufp))
1870 #undef APPLY_TAINT_PROPER
1873 /* Do the permissions allow some operation? Assumes statcache already set. */
1874 #ifndef VMS /* VMS' cando is in vms.c */
1876 Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register const Stat_t *statbufp)
1877 /* Note: we use "effective" both for uids and gids.
1878 * Here we are betting on Uid_t being equal or wider than Gid_t. */
1881 /* [Comments and code from Len Reed]
1882 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1883 * to write-protected files. The execute permission bit is set
1884 * by the Miscrosoft C library stat() function for the following:
1889 * All files and directories are readable.
1890 * Directories and special files, e.g. "CON", cannot be
1892 * [Comment by Tom Dinger -- a directory can have the write-protect
1893 * bit set in the file system, but DOS permits changes to
1894 * the directory anyway. In addition, all bets are off
1895 * here for networked software, such as Novell and
1899 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1900 * too so it will actually look into the files for magic numbers
1902 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1904 #else /* ! DOSISH */
1905 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1906 if (mode == S_IXUSR) {
1907 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1911 return TRUE; /* root reads and writes anything */
1914 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1915 if (statbufp->st_mode & mode)
1916 return TRUE; /* ok as "user" */
1918 else if (ingroup(statbufp->st_gid,effective)) {
1919 if (statbufp->st_mode & mode >> 3)
1920 return TRUE; /* ok as "group" */
1922 else if (statbufp->st_mode & mode >> 6)
1923 return TRUE; /* ok as "other" */
1925 #endif /* ! DOSISH */
1930 Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
1932 #ifdef MACOS_TRADITIONAL
1933 /* This is simply not correct for AppleShare, but fix it yerself. */
1936 if (testgid == (effective ? PL_egid : PL_gid))
1938 #ifdef HAS_GETGROUPS
1943 Groups_t gary[NGROUPS];
1946 anum = getgroups(NGROUPS,gary);
1948 if (gary[anum] == testgid)
1956 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1959 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1961 key_t key = (key_t)SvNVx(*++mark);
1962 const I32 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1963 const I32 flags = SvIVx(*++mark);
1971 return msgget(key, flags);
1975 return semget(key, n, flags);
1979 return shmget(key, n, flags);
1981 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1983 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1986 return -1; /* should never happen */
1990 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
1997 const I32 id = SvIVx(*++mark);
1998 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1999 const I32 cmd = SvIVx(*++mark);
2004 getinfo = (cmd == IPC_STAT);
2010 if (cmd == IPC_STAT || cmd == IPC_SET)
2011 infosize = sizeof(struct msqid_ds);
2016 if (cmd == IPC_STAT || cmd == IPC_SET)
2017 infosize = sizeof(struct shmid_ds);
2023 if (cmd == IPC_STAT || cmd == IPC_SET)
2024 infosize = sizeof(struct semid_ds);
2025 else if (cmd == GETALL || cmd == SETALL)
2027 struct semid_ds semds;
2029 #ifdef EXTRA_F_IN_SEMUN_BUF
2030 semun.buff = &semds;
2034 getinfo = (cmd == GETALL);
2035 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2037 infosize = semds.sem_nsems * sizeof(short);
2038 /* "short" is technically wrong but much more portable
2039 than guessing about u_?short(_t)? */
2042 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2046 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2048 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2056 SvPV_force_nolen(astr);
2057 a = SvGROW(astr, infosize+1);
2062 a = SvPV(astr, len);
2063 if (len != infosize)
2064 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2073 a = INT2PTR(char *,i); /* ouch */
2080 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2086 union semun unsemds;
2088 #ifdef EXTRA_F_IN_SEMUN_BUF
2089 unsemds.buff = (struct semid_ds *)a;
2091 unsemds.buf = (struct semid_ds *)a;
2093 ret = Semctl(id, n, cmd, unsemds);
2095 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2102 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2106 if (getinfo && ret >= 0) {
2107 SvCUR_set(astr, infosize);
2108 *SvEND(astr) = '\0';
2115 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2122 const I32 id = SvIVx(*++mark);
2126 flags = SvIVx(*++mark);
2127 mbuf = SvPV_const(mstr, len);
2128 if ((msize = len - sizeof(long)) < 0)
2129 Perl_croak(aTHX_ "Arg too short for msgsnd");
2131 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2133 Perl_croak(aTHX_ "msgsnd not implemented");
2138 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2144 I32 msize, flags, ret;
2145 const I32 id = SvIVx(*++mark);
2149 /* suppress warning when reading into undef var --jhi */
2151 sv_setpvn(mstr, "", 0);
2152 msize = SvIVx(*++mark);
2153 mtype = (long)SvIVx(*++mark);
2154 flags = SvIVx(*++mark);
2155 SvPV_force_nolen(mstr);
2156 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2159 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2161 SvCUR_set(mstr, sizeof(long)+ret);
2162 *SvEND(mstr) = '\0';
2163 #ifndef INCOMPLETE_TAINTS
2164 /* who knows who has been playing with this message? */
2170 Perl_croak(aTHX_ "msgrcv not implemented");
2175 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2181 const I32 id = SvIVx(*++mark);
2185 opbuf = SvPV_const(opstr, opsize);
2186 if (opsize < 3 * SHORTSIZE
2187 || (opsize % (3 * SHORTSIZE))) {
2188 SETERRNO(EINVAL,LIB_INVARG);
2192 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2194 const int nsops = opsize / (3 * sizeof (short));
2196 short *ops = (short *) opbuf;
2198 struct sembuf *temps, *t;
2201 New (0, temps, nsops, struct sembuf);
2209 result = semop(id, temps, nsops);
2223 Perl_croak(aTHX_ "semop not implemented");
2228 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2234 struct shmid_ds shmds;
2235 const I32 id = SvIVx(*++mark);
2239 mpos = SvIVx(*++mark);
2240 msize = SvIVx(*++mark);
2242 if (shmctl(id, IPC_STAT, &shmds) == -1)
2244 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
2245 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2248 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2249 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2251 if (optype == OP_SHMREAD) {
2253 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2255 sv_setpvn(mstr, "", 0);
2256 SvPV_force_nolen(mstr);
2257 mbuf = SvGROW(mstr, msize+1);
2259 Copy(shm + mpos, mbuf, msize, char);
2260 SvCUR_set(mstr, msize);
2261 *SvEND(mstr) = '\0';
2263 #ifndef INCOMPLETE_TAINTS
2264 /* who knows who has been playing with this shared memory? */
2272 const char *mbuf = SvPV_const(mstr, len);
2273 if ((n = len) > msize)
2275 Copy(mbuf, shm + mpos, n, char);
2277 memzero(shm + mpos + n, msize - n);
2281 Perl_croak(aTHX_ "shm I/O not implemented");
2285 #endif /* SYSV IPC */
2290 =for apidoc start_glob
2292 Function called by C<do_readline> to spawn a glob (or do the glob inside
2293 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2294 this glob starter is only used by miniperl during the build process.
2295 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2301 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2304 SV *tmpcmd = NEWSV(55, 0);
2308 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2309 /* since spawning off a process is a real performance hit */
2311 #include <descrip.h>
2312 #include <lib$routines.h>
2315 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
2316 char vmsspec[NAM$C_MAXRSS+1];
2317 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
2318 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
2321 struct dsc$descriptor_s wilddsc
2322 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2323 struct dsc$descriptor_vs rsdsc
2324 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
2325 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
2327 /* We could find out if there's an explicit dev/dir or version
2328 by peeking into lib$find_file's internal context at
2329 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
2330 but that's unsupported, so I don't want to do it now and
2331 have it bite someone in the future. */
2332 cp = SvPV(tmpglob,i);
2334 if (cp[i] == ';') hasver = 1;
2336 if (sts) hasver = 1;
2340 hasdir = isunix = 1;
2343 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
2348 if ((tmpfp = PerlIO_tmpfile()) != NULL) {
2350 if (!PerlLIO_stat(SvPVX_const(tmpglob),&st) && S_ISDIR(st.st_mode))
2351 ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL);
2352 else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
2353 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
2354 for (cp=wilddsc.dsc$a_pointer; ok && cp && *cp; cp++)
2355 if (*cp == '?') *cp = '%'; /* VMS style single-char wildcard */
2356 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
2357 &dfltdsc,NULL,NULL,NULL))&1)) {
2358 /* with varying string, 1st word of buffer contains result length */
2359 end = rstr + *((unsigned short int*)rslt);
2360 if (!hasver) while (*end != ';' && end > rstr) end--;
2361 *(end++) = '\n'; *end = '\0';
2362 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
2364 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
2369 while (*(--begin) != ']' && *begin != '>') ;
2372 ok = (PerlIO_puts(tmpfp,begin) != EOF);
2374 if (cxt) (void)lib$find_file_end(&cxt);
2375 if (ok && sts != RMS$_NMF &&
2376 sts != RMS$_DNF && sts != RMS_FNF) ok = 0;
2379 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
2381 PerlIO_close(tmpfp);
2385 PerlIO_rewind(tmpfp);
2386 IoTYPE(io) = IoTYPE_RDONLY;
2387 IoIFP(io) = fp = tmpfp;
2388 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
2393 #ifdef MACOS_TRADITIONAL
2394 sv_setpv(tmpcmd, "glob ");
2395 sv_catsv(tmpcmd, tmpglob);
2396 sv_catpv(tmpcmd, " |");
2400 sv_setpv(tmpcmd, "for a in ");
2401 sv_catsv(tmpcmd, tmpglob);
2402 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2405 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2406 sv_catsv(tmpcmd, tmpglob);
2408 sv_setpv(tmpcmd, "perlglob ");
2409 sv_catsv(tmpcmd, tmpglob);
2410 sv_catpv(tmpcmd, " |");
2415 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2416 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2417 sv_catsv(tmpcmd, tmpglob);
2418 sv_catpv(tmpcmd, "' 2>/dev/null |");
2420 sv_setpv(tmpcmd, "echo ");
2421 sv_catsv(tmpcmd, tmpglob);
2423 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2425 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2428 #endif /* !DOSISH */
2429 #endif /* MACOS_TRADITIONAL */
2430 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2431 FALSE, O_RDONLY, 0, Nullfp);
2440 * c-indentation-style: bsd
2442 * indent-tabs-mode: t
2445 * ex: set ts=8 sts=4 sw=4 noet: