3 * Copyright (c) 1991-2001, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "Far below them they saw the white waters pour into a foaming bowl, and
12 * then swirl darkly about a deep oval basin in the rocks, until they found
13 * their way out again through a narrow gate, and flowed away, fuming and
14 * chattering, into calmer and more level reaches."
18 #define PERL_IN_DOIO_C
21 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
30 # ifndef HAS_SHMAT_PROTOTYPE
31 extern Shmat_t shmat (int, char *, int);
37 # if defined(_MSC_VER) || defined(__MINGW32__)
38 # include <sys/utime.h>
45 # define OPEN_EXCL O_EXCL
50 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
55 Perl_do_open(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
56 int rawmode, int rawperm, PerlIO *supplied_fp)
58 return do_openn(gv, name, len, as_raw, rawmode, rawperm,
59 supplied_fp, (SV **) NULL, 0);
63 Perl_do_open9(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
64 int rawmode, int rawperm, PerlIO *supplied_fp, SV *svs,
67 return do_openn(gv, name, len, as_raw, rawmode, rawperm,
68 supplied_fp, &svs, 1);
72 Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
73 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
76 register IO *io = GvIOn(gv);
77 PerlIO *saveifp = Nullfp;
78 PerlIO *saveofp = Nullfp;
80 char savetype = IoTYPE_CLOSED;
85 bool was_fdopen = FALSE;
86 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
88 char mode[8]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */
91 Zero(mode,sizeof(mode),char);
92 PL_forkprocess = 1; /* assume true if no fork */
94 /* Collect default raw/crlf info from the op */
95 if (PL_op && PL_op->op_type == OP_OPEN) {
96 /* set up disciplines */
97 U8 flags = PL_op->op_private;
98 in_raw = (flags & OPpOPEN_IN_RAW);
99 in_crlf = (flags & OPpOPEN_IN_CRLF);
100 out_raw = (flags & OPpOPEN_OUT_RAW);
101 out_crlf = (flags & OPpOPEN_OUT_CRLF);
104 /* If currently open - close before we re-open */
106 fd = PerlIO_fileno(IoIFP(io));
107 if (IoTYPE(io) == IoTYPE_STD) {
108 /* This is a clone of one of STD* handles */
111 else if (fd >= 0 && fd <= PL_maxsysfd) {
112 /* This is one of the original STD* handles */
115 savetype = IoTYPE(io);
119 else if (IoTYPE(io) == IoTYPE_PIPE)
120 result = PerlProc_pclose(IoIFP(io));
121 else if (IoIFP(io) != IoOFP(io)) {
123 result = PerlIO_close(IoOFP(io));
124 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
127 result = PerlIO_close(IoIFP(io));
130 result = PerlIO_close(IoIFP(io));
131 if (result == EOF && fd > PL_maxsysfd) {
132 /* Why is this not Perl_warn*() call ? */
133 PerlIO_printf(Perl_error_log,
134 "Warning: unable to close filehandle %s properly.\n",
137 IoOFP(io) = IoIFP(io) = Nullfp;
141 /* sysopen style args, i.e. integer mode and permissions */
144 Perl_croak(aTHX_ "panic: sysopen with multiple args");
146 if (rawmode & (O_WRONLY|O_RDWR|O_APPEND|O_CREAT|O_TRUNC))
147 TAINT_PROPER("sysopen");
148 mode[ix++] = '#'; /* Marker to openn to use numeric "sysopen" */
150 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
151 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
155 #define O_ACCMODE 3 /* Assume traditional implementation */
158 switch (result = rawmode & O_ACCMODE) {
160 IoTYPE(io) = IoTYPE_RDONLY;
163 IoTYPE(io) = IoTYPE_WRONLY;
167 IoTYPE(io) = IoTYPE_RDWR;
170 writing = (result > 0);
172 if (result == O_RDONLY) {
176 else if (rawmode & O_APPEND) {
178 if (result != O_WRONLY)
183 if (result == O_WRONLY)
190 if (rawmode & O_BINARY)
194 namesv = sv_2mortal(newSVpvn(name,strlen(name)));
198 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
201 /* Regular (non-sys) open */
207 type = savepvn(name, len);
210 /* Loose trailing white space */
211 while (tend > type && isSPACE(tend[-1]))
214 /* New style explict name, type is just mode and discipline/layer info */
216 name = SvOK(*svp) ? SvPV(*svp, l) : "";
218 name = savepvn(name, len);
221 for (; isSPACE(*type); type++) ;
228 if ((*type == IoTYPE_RDWR) && ((!num_svs || tend > type+1 && tend[-1] != IoTYPE_PIPE))) { /* scary */
233 if (*type == IoTYPE_PIPE) {
235 if (type[1] != IoTYPE_STD) {
237 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
242 for (type++; isSPACE(*type); type++) ;
248 /* command is missing 19990114 */
249 if (ckWARN(WARN_PIPE))
250 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
254 if (strNE(name,"-") || num_svs)
256 TAINT_PROPER("piped open");
257 if (!num_svs && name[len-1] == '|') {
259 if (ckWARN(WARN_PIPE))
260 Perl_warner(aTHX_ WARN_PIPE, "Can't open bidirectional pipe");
269 fp = PerlProc_popen_list(mode, num_svs, svp);
272 fp = PerlProc_popen(name,mode);
275 else if (*type == IoTYPE_WRONLY) {
276 TAINT_PROPER("open");
278 if (*type == IoTYPE_WRONLY) {
279 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
280 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
301 if (!num_svs && !*type && supplied_fp) {
302 /* "<+&" etc. is used by typemaps */
307 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
309 if (num_svs && SvIOK(*svp)) {
312 else if (isDIGIT(*type)) {
314 for (; isSPACE(*type); type++) ;
320 thatio = sv_2io(*svp);
325 for (; isSPACE(*type); type++) ;
326 thatgv = gv_fetchpv(type,FALSE,SVt_PVIO);
327 thatio = GvIO(thatgv);
331 SETERRNO(EINVAL,SS$_IVCHAN);
336 PerlIO *fp = IoIFP(thatio);
337 /* Flush stdio buffer before dup. --mjd
338 * Unfortunately SEEK_CURing 0 seems to
339 * be optimized away on most platforms;
340 * only Solaris and Linux seem to flush
343 /* sfio fails to clear error on next
344 sfwrite, contrary to documentation.
346 if (PerlIO_seek(fp, 0, SEEK_CUR) == -1)
349 /* On the other hand, do all platforms
350 * take gracefully to flushing a read-only
351 * filehandle? Perhaps we should do
352 * fsetpos(src)+fgetpos(dst)? --nik */
354 fd = PerlIO_fileno(fp);
355 /* When dup()ing STDIN, STDOUT or STDERR
356 * explicitly set appropriate access mode */
357 if (IoIFP(thatio) == PerlIO_stdout()
358 || IoIFP(thatio) == PerlIO_stderr())
359 IoTYPE(io) = IoTYPE_WRONLY;
360 else if (IoIFP(thatio) == PerlIO_stdin())
361 IoTYPE(io) = IoTYPE_RDONLY;
362 /* When dup()ing a socket, say result is
364 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
365 IoTYPE(io) = IoTYPE_SOCKET;
371 fd = PerlLIO_dup(fd);
376 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
384 Perl_croak(aTHX_ "More than one argument to '>' open");
387 for (; isSPACE(*type); type++) ;
388 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
391 fp = PerlIO_stdout();
392 IoTYPE(io) = IoTYPE_STD;
396 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
401 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
405 else if (*type == IoTYPE_RDONLY) {
407 Perl_croak(aTHX_ "More than one argument to '<' open");
410 for (type++; isSPACE(*type); type++) ;
420 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
424 IoTYPE(io) = IoTYPE_STD;
428 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
433 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
436 else if ((num_svs && type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
437 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
439 type += 2; /* skip over '-|' */
443 while (tend > type && isSPACE(tend[-1]))
446 for (; isSPACE(*type); type++) ;
451 /* command is missing 19990114 */
452 if (ckWARN(WARN_PIPE))
453 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
457 if (strNE(name,"-") || num_svs)
459 TAINT_PROPER("piped open");
466 fp = PerlProc_popen_list(mode,num_svs,svp);
469 fp = PerlProc_popen(name,mode);
471 IoTYPE(io) = IoTYPE_PIPE;
477 IoTYPE(io) = IoTYPE_RDONLY;
479 for (; isSPACE(*name); name++) ;
485 if (strEQ(name,"-")) {
487 IoTYPE(io) = IoTYPE_STD;
491 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
496 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
501 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == IoTYPE_RDONLY && strchr(name, '\n'))
502 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
506 if (ckWARN(WARN_IO)) {
507 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
508 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
509 Perl_warner(aTHX_ WARN_IO,
510 "Filehandle STD%s opened only for input",
511 (fp == PerlIO_stdout()) ? "OUT" : "ERR");
513 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
514 Perl_warner(aTHX_ WARN_IO,
515 "Filehandle STDIN opened only for output");
519 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD &&
520 /* FIXME: This next term is a hack to avoid fileno on PerlIO::Scalar */
521 !(num_svs && SvROK(*svp))) {
522 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
523 (void)PerlIO_close(fp);
526 if (S_ISSOCK(PL_statbuf.st_mode))
527 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
531 !(PL_statbuf.st_mode & S_IFMT)
535 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
536 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
537 ) { /* on OS's that return 0 on fstat()ed pipe */
539 Sock_size_t buflen = sizeof tmpbuf;
540 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
542 || errno != ENOTSOCK)
543 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
544 /* but some return 0 for streams too, sigh */
548 if (saveifp) { /* must use old fp? */
549 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
550 then dup the new fileno down
552 fd = PerlIO_fileno(fp);
554 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
555 if (saveofp != saveifp) { /* was a socket? */
556 PerlIO_close(saveofp);
562 if (PerlLIO_dup2(fd, savefd) < 0) {
563 (void)PerlIO_close(fp);
567 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
568 char newname[FILENAME_MAX+1];
569 if (PerlIO_getname(fp, newname)) {
570 if (fd == PerlIO_fileno(PerlIO_stdout())) Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
571 if (fd == PerlIO_fileno(PerlIO_stderr())) Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
576 sv = *av_fetch(PL_fdpid,fd,TRUE);
577 (void)SvUPGRADE(sv, SVt_IV);
580 sv = *av_fetch(PL_fdpid,savefd,TRUE);
582 (void)SvUPGRADE(sv, SVt_IV);
590 #if defined(HAS_FCNTL) && defined(F_SETFD)
592 int save_errno = errno;
593 fd = PerlIO_fileno(fp);
594 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
600 IoFLAGS(io) &= ~IOf_NOLINE;
602 if (IoTYPE(io) == IoTYPE_SOCKET
603 || (IoTYPE(io) == IoTYPE_WRONLY && S_ISCHR(PL_statbuf.st_mode)) ) {
605 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,mode,PerlIO_fileno(fp),0,0,NULL,num_svs,svp))) {
619 IoTYPE(io) = savetype;
624 Perl_nextargv(pTHX_ register GV *gv)
627 #ifndef FLEXFILENAMES
636 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
637 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
638 IoFLAGS(io) &= ~IOf_START;
640 if (!PL_argvout_stack)
641 PL_argvout_stack = newAV();
642 av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
645 if (PL_filemode & (S_ISUID|S_ISGID)) {
646 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
648 (void)fchmod(PL_lastfd,PL_filemode);
650 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
654 while (av_len(GvAV(gv)) >= 0) {
656 sv = av_shift(GvAV(gv));
658 sv_setsv(GvSV(gv),sv);
659 SvSETMAGIC(GvSV(gv));
660 PL_oldname = SvPVx(GvSV(gv), oldlen);
661 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
663 TAINT_PROPER("inplace open");
664 if (oldlen == 1 && *PL_oldname == '-') {
665 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
666 return IoIFP(GvIOp(gv));
668 #ifndef FLEXFILENAMES
669 filedev = PL_statbuf.st_dev;
670 fileino = PL_statbuf.st_ino;
672 PL_filemode = PL_statbuf.st_mode;
673 fileuid = PL_statbuf.st_uid;
674 filegid = PL_statbuf.st_gid;
675 if (!S_ISREG(PL_filemode)) {
676 if (ckWARN_d(WARN_INPLACE))
677 Perl_warner(aTHX_ WARN_INPLACE,
678 "Can't do inplace edit: %s is not a regular file",
684 char *star = strchr(PL_inplace, '*');
686 char *begin = PL_inplace;
687 sv_setpvn(sv, "", 0);
689 sv_catpvn(sv, begin, star - begin);
690 sv_catpvn(sv, PL_oldname, oldlen);
692 } while ((star = strchr(begin, '*')));
697 sv_catpv(sv,PL_inplace);
699 #ifndef FLEXFILENAMES
700 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
701 && PL_statbuf.st_dev == filedev
702 && PL_statbuf.st_ino == fileino
704 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
708 if (ckWARN_d(WARN_INPLACE))
709 Perl_warner(aTHX_ WARN_INPLACE,
710 "Can't do inplace edit: %s would not be unique",
717 #if !defined(DOSISH) && !defined(__CYGWIN__)
718 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
719 if (ckWARN_d(WARN_INPLACE))
720 Perl_warner(aTHX_ WARN_INPLACE,
721 "Can't rename %s to %s: %s, skipping file",
722 PL_oldname, SvPVX(sv), Strerror(errno) );
728 (void)PerlLIO_unlink(SvPVX(sv));
729 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
730 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
733 (void)UNLINK(SvPVX(sv));
734 if (link(PL_oldname,SvPVX(sv)) < 0) {
735 if (ckWARN_d(WARN_INPLACE))
736 Perl_warner(aTHX_ WARN_INPLACE,
737 "Can't rename %s to %s: %s, skipping file",
738 PL_oldname, SvPVX(sv), Strerror(errno) );
742 (void)UNLINK(PL_oldname);
746 #if !defined(DOSISH) && !defined(AMIGAOS)
747 # ifndef VMS /* Don't delete; use automatic file versioning */
748 if (UNLINK(PL_oldname) < 0) {
749 if (ckWARN_d(WARN_INPLACE))
750 Perl_warner(aTHX_ WARN_INPLACE,
751 "Can't remove %s: %s, skipping file",
752 PL_oldname, Strerror(errno) );
758 Perl_croak(aTHX_ "Can't do inplace edit without backup");
762 sv_setpvn(sv,">",!PL_inplace);
763 sv_catpvn(sv,PL_oldname,oldlen);
764 SETERRNO(0,0); /* in case sprintf set errno */
766 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
767 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
769 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
770 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp))
773 if (ckWARN_d(WARN_INPLACE))
774 Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit on %s: %s",
775 PL_oldname, Strerror(errno) );
779 setdefout(PL_argvoutgv);
780 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
781 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
783 (void)fchmod(PL_lastfd,PL_filemode);
785 # if !(defined(WIN32) && defined(__BORLANDC__))
786 /* Borland runtime creates a readonly file! */
787 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
790 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
792 (void)fchown(PL_lastfd,fileuid,filegid);
795 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
800 return IoIFP(GvIOp(gv));
803 if (ckWARN_d(WARN_INPLACE)) {
805 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
806 && !S_ISREG(PL_statbuf.st_mode))
808 Perl_warner(aTHX_ WARN_INPLACE,
809 "Can't do inplace edit: %s is not a regular file",
813 Perl_warner(aTHX_ WARN_INPLACE, "Can't open %s: %s",
814 PL_oldname, Strerror(eno));
818 if (io && (IoFLAGS(io) & IOf_ARGV))
819 IoFLAGS(io) |= IOf_START;
821 (void)do_close(PL_argvoutgv,FALSE);
822 if (io && (IoFLAGS(io) & IOf_ARGV)
823 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
825 GV *oldout = (GV*)av_pop(PL_argvout_stack);
827 SvREFCNT_dec(oldout);
830 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
837 Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
856 if (PerlProc_pipe(fd) < 0)
858 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
859 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
860 IoIFP(wstio) = IoOFP(wstio);
861 IoTYPE(rstio) = IoTYPE_RDONLY;
862 IoTYPE(wstio) = IoTYPE_WRONLY;
863 if (!IoIFP(rstio) || !IoOFP(wstio)) {
864 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
865 else PerlLIO_close(fd[0]);
866 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
867 else PerlLIO_close(fd[1]);
871 sv_setsv(sv,&PL_sv_yes);
875 sv_setsv(sv,&PL_sv_undef);
880 /* explicit renamed to avoid C++ conflict -- kja */
882 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
889 if (!gv || SvTYPE(gv) != SVt_PVGV) {
891 SETERRNO(EBADF,SS$_IVCHAN);
895 if (!io) { /* never opened */
897 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
898 report_evil_fh(gv, io, PL_op->op_type);
899 SETERRNO(EBADF,SS$_IVCHAN);
903 retval = io_close(io, not_implicit);
907 IoLINES_LEFT(io) = IoPAGE_LEN(io);
909 IoTYPE(io) = IoTYPE_CLOSED;
914 Perl_io_close(pTHX_ IO *io, bool not_implicit)
920 if (IoTYPE(io) == IoTYPE_PIPE) {
921 status = PerlProc_pclose(IoIFP(io));
923 STATUS_NATIVE_SET(status);
924 retval = (STATUS_POSIX == 0);
927 retval = (status != -1);
930 else if (IoTYPE(io) == IoTYPE_STD)
933 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
934 retval = (PerlIO_close(IoOFP(io)) != EOF);
935 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
938 retval = (PerlIO_close(IoIFP(io)) != EOF);
940 IoOFP(io) = IoIFP(io) = Nullfp;
942 else if (not_implicit) {
943 SETERRNO(EBADF,SS$_IVCHAN);
950 Perl_do_eof(pTHX_ GV *gv)
959 else if (ckWARN(WARN_IO) && (IoTYPE(io) == IoTYPE_WRONLY))
961 /* integrate to report_evil_fh()? */
964 SV* sv = sv_newmortal();
965 gv_efullname4(sv, gv, Nullch, FALSE);
966 name = SvPV_nolen(sv);
969 Perl_warner(aTHX_ WARN_IO,
970 "Filehandle %s opened only for output", name);
972 Perl_warner(aTHX_ WARN_IO,
973 "Filehandle opened only for output");
978 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
979 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
980 return FALSE; /* this is the most usual case */
983 ch = PerlIO_getc(IoIFP(io));
985 (void)PerlIO_ungetc(IoIFP(io),ch);
989 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
990 if (PerlIO_get_cnt(IoIFP(io)) < -1)
991 PerlIO_set_cnt(IoIFP(io),-1);
993 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
994 if (!nextargv(PL_argvgv)) /* get another fp handy */
998 return TRUE; /* normal fp, definitely end of file */
1004 Perl_do_tell(pTHX_ GV *gv)
1007 register PerlIO *fp;
1009 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1010 #ifdef ULTRIX_STDIO_BOTCH
1012 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1014 return PerlIO_tell(fp);
1016 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1017 report_evil_fh(gv, io, PL_op->op_type);
1018 SETERRNO(EBADF,RMS$_IFI);
1023 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1026 register PerlIO *fp;
1028 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1029 #ifdef ULTRIX_STDIO_BOTCH
1031 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1033 return PerlIO_seek(fp, pos, whence) >= 0;
1035 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1036 report_evil_fh(gv, io, PL_op->op_type);
1037 SETERRNO(EBADF,RMS$_IFI);
1042 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1045 register PerlIO *fp;
1047 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
1048 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1049 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1050 report_evil_fh(gv, io, PL_op->op_type);
1051 SETERRNO(EBADF,RMS$_IFI);
1056 Perl_mode_from_discipline(pTHX_ SV *discp)
1058 int mode = O_BINARY;
1061 char *s = SvPV(discp,len);
1066 if (len > 3 && strnEQ(s+1, "raw", 3)
1067 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1076 if (len > 4 && strnEQ(s+1, "crlf", 4)
1077 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1086 goto fail_discipline;
1089 else if (isSPACE(*s)) {
1096 end = strchr(s+1, ':');
1099 #ifndef PERLIO_LAYERS
1100 Perl_croak(aTHX_ "Unknown discipline '%.*s'", end-s, s);
1111 Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
1113 /* The old body of this is now in non-LAYER part of perlio.c
1114 * This is a stub for any XS code which might have been calling it.
1116 char *name = (O_BINARY != O_TEXT && !(mode & O_BINARY)) ? ":crlf" : ":raw";
1117 return PerlIO_binmode(aTHX_ fp, iotype, mode, name);
1120 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
1121 /* code courtesy of William Kucharski */
1124 I32 my_chsize(fd, length)
1125 I32 fd; /* file descriptor */
1126 Off_t length; /* length to set file to */
1129 struct stat filebuf;
1131 if (PerlLIO_fstat(fd, &filebuf) < 0)
1134 if (filebuf.st_size < length) {
1136 /* extend file length */
1138 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1141 /* write a "0" byte */
1143 if ((PerlLIO_write(fd, "", 1)) != 1)
1147 /* truncate length */
1151 fl.l_start = length;
1152 fl.l_type = F_WRLCK; /* write lock on file space */
1155 * This relies on the UNDOCUMENTED F_FREESP argument to
1156 * fcntl(2), which truncates the file so that it ends at the
1157 * position indicated by fl.l_start.
1159 * Will minor miracles never cease?
1162 if (fcntl(fd, F_FREESP, &fl) < 0)
1169 #endif /* F_FREESP */
1172 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1174 register char *tmps;
1177 /* assuming fp is checked earlier */
1183 if (SvIOK(sv) && SvIVX(sv) != 0) {
1184 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
1185 return !PerlIO_error(fp);
1187 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
1188 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
1189 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
1190 return !PerlIO_error(fp);
1193 switch (SvTYPE(sv)) {
1195 if (ckWARN(WARN_UNINITIALIZED))
1203 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1205 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1206 return !PerlIO_error(fp);
1210 if (PerlIO_isutf8(fp)) {
1212 sv_utf8_upgrade(sv = sv_mortalcopy(sv));
1214 else if (DO_UTF8(sv)) {
1215 if (!sv_utf8_downgrade((sv = sv_mortalcopy(sv)), TRUE)) {
1216 Perl_warner(aTHX_ WARN_UTF8, "Wide character in print");
1219 tmps = SvPV(sv, len);
1222 /* To detect whether the process is about to overstep its
1223 * filesize limit we would need getrlimit(). We could then
1224 * also transparently raise the limit with setrlimit() --
1225 * but only until the system hard limit/the filesystem limit,
1226 * at which we would get EPERM. Note that when using buffered
1227 * io the write failure can be delayed until the flush/close. --jhi */
1228 if (len && (PerlIO_write(fp,tmps,len) == 0))
1230 return !PerlIO_error(fp);
1240 if (PL_op->op_flags & OPf_REF) {
1245 if (io && IoIFP(io)) {
1247 sv_setpv(PL_statname,"");
1248 PL_laststype = OP_STAT;
1249 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1253 return PL_laststatval;
1254 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1255 report_evil_fh(gv, io, PL_op->op_type);
1257 sv_setpv(PL_statname,"");
1258 return (PL_laststatval = -1);
1266 if (SvTYPE(sv) == SVt_PVGV) {
1270 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1277 sv_setpv(PL_statname, s);
1278 PL_laststype = OP_STAT;
1279 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1280 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1281 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
1282 return PL_laststatval;
1292 if (PL_op->op_flags & OPf_REF) {
1294 if (cGVOP_gv == PL_defgv) {
1295 if (PL_laststype != OP_LSTAT)
1296 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
1297 return PL_laststatval;
1299 Perl_croak(aTHX_ "You can't use -l on a filehandle");
1302 PL_laststype = OP_LSTAT;
1306 sv_setpv(PL_statname,SvPV(sv, n_a));
1307 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
1308 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
1309 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
1310 return PL_laststatval;
1314 Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1316 return do_aexec5(really, mark, sp, 0, 0);
1320 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1321 int fd, int do_report)
1323 #ifdef MACOS_TRADITIONAL
1324 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1331 New(401,PL_Argv, sp - mark + 1, char*);
1333 while (++mark <= sp) {
1335 *a++ = SvPVx(*mark, n_a);
1341 tmps = SvPV(really, n_a);
1342 if ((!really && *PL_Argv[0] != '/') ||
1343 (really && *tmps != '/')) /* will execvp use PATH? */
1344 TAINT_ENV(); /* testing IFS here is overkill, probably */
1345 if (really && *tmps)
1346 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1348 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1349 if (ckWARN(WARN_EXEC))
1350 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1351 (really ? tmps : PL_Argv[0]), Strerror(errno));
1355 PerlLIO_write(fd, (void*)&e, sizeof(int));
1365 Perl_do_execfree(pTHX)
1369 PL_Argv = Null(char **);
1377 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
1380 Perl_do_exec(pTHX_ char *cmd)
1382 return do_exec3(cmd,0,0);
1386 Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1392 while (*cmd && isSPACE(*cmd))
1395 /* save an extra exec if possible */
1398 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1400 s = cmd+PL_cshlen+3;
1414 if (s[-1] == '\'') {
1416 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1424 /* see if there are shell metacharacters in it */
1426 if (*cmd == '.' && isSPACE(cmd[1]))
1429 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1432 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
1436 for (s = cmd; *s; s++) {
1437 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1438 if (*s == '\n' && !s[1]) {
1442 /* handle the 2>&1 construct at the end */
1443 if (*s == '>' && s[1] == '&' && s[2] == '1'
1444 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1445 && (!s[3] || isSPACE(s[3])))
1449 while (*t && isSPACE(*t))
1451 if (!*t && (dup2(1,2) != -1)) {
1457 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1462 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1463 PL_Cmd = savepvn(cmd, s-cmd);
1465 for (s = PL_Cmd; *s;) {
1466 while (*s && isSPACE(*s)) s++;
1469 while (*s && !isSPACE(*s)) s++;
1475 PerlProc_execvp(PL_Argv[0],PL_Argv);
1476 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1483 if (ckWARN(WARN_EXEC))
1484 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1485 PL_Argv[0], Strerror(errno));
1487 PerlLIO_write(fd, (void*)&e, sizeof(int));
1496 #endif /* OS2 || WIN32 */
1499 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1503 register I32 tot = 0;
1506 SV **oldmark = mark;
1509 #define APPLY_TAINT_PROPER() \
1511 if (PL_tainted) { TAINT_PROPER(what); } \
1514 /* This is a first heuristic; it doesn't catch tainting magic. */
1516 while (++mark <= sp) {
1517 if (SvTAINTED(*mark)) {
1527 APPLY_TAINT_PROPER();
1530 APPLY_TAINT_PROPER();
1532 while (++mark <= sp) {
1533 char *name = SvPVx(*mark, n_a);
1534 APPLY_TAINT_PROPER();
1535 if (PerlLIO_chmod(name, val))
1543 APPLY_TAINT_PROPER();
1544 if (sp - mark > 2) {
1545 val = SvIVx(*++mark);
1546 val2 = SvIVx(*++mark);
1547 APPLY_TAINT_PROPER();
1549 while (++mark <= sp) {
1550 char *name = SvPVx(*mark, n_a);
1551 APPLY_TAINT_PROPER();
1552 if (PerlLIO_chown(name, val, val2))
1559 XXX Should we make lchown() directly available from perl?
1560 For now, we'll let Configure test for HAS_LCHOWN, but do
1561 nothing in the core.
1567 APPLY_TAINT_PROPER();
1570 s = SvPVx(*++mark, n_a);
1572 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1574 if (!(val = whichsig(s)))
1575 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1579 APPLY_TAINT_PROPER();
1582 /* kill() doesn't do process groups (job trees?) under VMS */
1583 if (val < 0) val = -val;
1584 if (val == SIGKILL) {
1585 # include <starlet.h>
1586 /* Use native sys$delprc() to insure that target process is
1587 * deleted; supervisor-mode images don't pay attention to
1588 * CRTL's emulation of Unix-style signals and kill()
1590 while (++mark <= sp) {
1591 I32 proc = SvIVx(*mark);
1592 register unsigned long int __vmssts;
1593 APPLY_TAINT_PROPER();
1594 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1598 case SS$_NOSUCHNODE:
1599 SETERRNO(ESRCH,__vmssts);
1602 SETERRNO(EPERM,__vmssts);
1605 SETERRNO(EVMSERR,__vmssts);
1614 while (++mark <= sp) {
1615 I32 proc = SvIVx(*mark);
1616 APPLY_TAINT_PROPER();
1618 if (PerlProc_killpg(proc,val)) /* BSD */
1620 if (PerlProc_kill(-proc,val)) /* SYSV */
1626 while (++mark <= sp) {
1627 I32 proc = SvIVx(*mark);
1628 APPLY_TAINT_PROPER();
1629 if (PerlProc_kill(proc, val))
1637 APPLY_TAINT_PROPER();
1639 while (++mark <= sp) {
1640 s = SvPVx(*mark, n_a);
1641 APPLY_TAINT_PROPER();
1642 if (PL_euid || PL_unsafe) {
1646 else { /* don't let root wipe out directories without -U */
1647 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1659 APPLY_TAINT_PROPER();
1660 if (sp - mark > 2) {
1661 #if defined(I_UTIME) || defined(VMS)
1662 struct utimbuf utbuf;
1670 Zero(&utbuf, sizeof utbuf, char);
1672 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1673 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1675 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1676 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
1678 APPLY_TAINT_PROPER();
1680 while (++mark <= sp) {
1681 char *name = SvPVx(*mark, n_a);
1682 APPLY_TAINT_PROPER();
1683 if (PerlLIO_utime(name, &utbuf))
1694 #undef APPLY_TAINT_PROPER
1697 /* Do the permissions allow some operation? Assumes statcache already set. */
1698 #ifndef VMS /* VMS' cando is in vms.c */
1700 Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register Stat_t *statbufp)
1701 /* Note: we use `effective' both for uids and gids.
1702 * Here we are betting on Uid_t being equal or wider than Gid_t. */
1705 /* [Comments and code from Len Reed]
1706 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1707 * to write-protected files. The execute permission bit is set
1708 * by the Miscrosoft C library stat() function for the following:
1713 * All files and directories are readable.
1714 * Directories and special files, e.g. "CON", cannot be
1716 * [Comment by Tom Dinger -- a directory can have the write-protect
1717 * bit set in the file system, but DOS permits changes to
1718 * the directory anyway. In addition, all bets are off
1719 * here for networked software, such as Novell and
1723 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1724 * too so it will actually look into the files for magic numbers
1726 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1728 #else /* ! DOSISH */
1729 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1730 if (mode == S_IXUSR) {
1731 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1735 return TRUE; /* root reads and writes anything */
1738 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1739 if (statbufp->st_mode & mode)
1740 return TRUE; /* ok as "user" */
1742 else if (ingroup(statbufp->st_gid,effective)) {
1743 if (statbufp->st_mode & mode >> 3)
1744 return TRUE; /* ok as "group" */
1746 else if (statbufp->st_mode & mode >> 6)
1747 return TRUE; /* ok as "other" */
1749 #endif /* ! DOSISH */
1754 Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
1756 #ifdef MACOS_TRADITIONAL
1757 /* This is simply not correct for AppleShare, but fix it yerself. */
1760 if (testgid == (effective ? PL_egid : PL_gid))
1762 #ifdef HAS_GETGROUPS
1767 Groups_t gary[NGROUPS];
1770 anum = getgroups(NGROUPS,gary);
1772 if (gary[anum] == testgid)
1780 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1783 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1788 key = (key_t)SvNVx(*++mark);
1789 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1790 flags = SvIVx(*++mark);
1796 return msgget(key, flags);
1800 return semget(key, n, flags);
1804 return shmget(key, n, flags);
1806 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1808 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1811 return -1; /* should never happen */
1815 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
1819 I32 id, n, cmd, infosize, getinfo;
1822 id = SvIVx(*++mark);
1823 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1824 cmd = SvIVx(*++mark);
1827 getinfo = (cmd == IPC_STAT);
1833 if (cmd == IPC_STAT || cmd == IPC_SET)
1834 infosize = sizeof(struct msqid_ds);
1839 if (cmd == IPC_STAT || cmd == IPC_SET)
1840 infosize = sizeof(struct shmid_ds);
1846 if (cmd == IPC_STAT || cmd == IPC_SET)
1847 infosize = sizeof(struct semid_ds);
1848 else if (cmd == GETALL || cmd == SETALL)
1850 struct semid_ds semds;
1852 #ifdef EXTRA_F_IN_SEMUN_BUF
1853 semun.buff = &semds;
1857 getinfo = (cmd == GETALL);
1858 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1860 infosize = semds.sem_nsems * sizeof(short);
1861 /* "short" is technically wrong but much more portable
1862 than guessing about u_?short(_t)? */
1865 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1869 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1871 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1880 SvPV_force(astr, len);
1881 a = SvGROW(astr, infosize+1);
1885 a = SvPV(astr, len);
1886 if (len != infosize)
1887 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
1896 a = INT2PTR(char *,i); /* ouch */
1903 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1909 union semun unsemds;
1911 #ifdef EXTRA_F_IN_SEMUN_BUF
1912 unsemds.buff = (struct semid_ds *)a;
1914 unsemds.buf = (struct semid_ds *)a;
1916 ret = Semctl(id, n, cmd, unsemds);
1918 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1925 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1929 if (getinfo && ret >= 0) {
1930 SvCUR_set(astr, infosize);
1931 *SvEND(astr) = '\0';
1938 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
1943 I32 id, msize, flags;
1946 id = SvIVx(*++mark);
1948 flags = SvIVx(*++mark);
1949 mbuf = SvPV(mstr, len);
1950 if ((msize = len - sizeof(long)) < 0)
1951 Perl_croak(aTHX_ "Arg too short for msgsnd");
1953 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1955 Perl_croak(aTHX_ "msgsnd not implemented");
1960 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
1966 I32 id, msize, flags, ret;
1969 id = SvIVx(*++mark);
1971 /* suppress warning when reading into undef var --jhi */
1973 sv_setpvn(mstr, "", 0);
1974 msize = SvIVx(*++mark);
1975 mtype = (long)SvIVx(*++mark);
1976 flags = SvIVx(*++mark);
1977 SvPV_force(mstr, len);
1978 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1981 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1983 SvCUR_set(mstr, sizeof(long)+ret);
1984 *SvEND(mstr) = '\0';
1985 #ifndef INCOMPLETE_TAINTS
1986 /* who knows who has been playing with this message? */
1992 Perl_croak(aTHX_ "msgrcv not implemented");
1997 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2005 id = SvIVx(*++mark);
2007 opbuf = SvPV(opstr, opsize);
2008 if (opsize < sizeof(struct sembuf)
2009 || (opsize % sizeof(struct sembuf)) != 0) {
2010 SETERRNO(EINVAL,LIB$_INVARG);
2014 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
2016 Perl_croak(aTHX_ "semop not implemented");
2021 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2026 I32 id, mpos, msize;
2028 struct shmid_ds shmds;
2030 id = SvIVx(*++mark);
2032 mpos = SvIVx(*++mark);
2033 msize = SvIVx(*++mark);
2035 if (shmctl(id, IPC_STAT, &shmds) == -1)
2037 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
2038 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
2041 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2042 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2044 if (optype == OP_SHMREAD) {
2045 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2047 sv_setpvn(mstr, "", 0);
2048 SvPV_force(mstr, len);
2049 mbuf = SvGROW(mstr, msize+1);
2051 Copy(shm + mpos, mbuf, msize, char);
2052 SvCUR_set(mstr, msize);
2053 *SvEND(mstr) = '\0';
2055 #ifndef INCOMPLETE_TAINTS
2056 /* who knows who has been playing with this shared memory? */
2063 mbuf = SvPV(mstr, len);
2064 if ((n = len) > msize)
2066 Copy(mbuf, shm + mpos, n, char);
2068 memzero(shm + mpos + n, msize - n);
2072 Perl_croak(aTHX_ "shm I/O not implemented");
2076 #endif /* SYSV IPC */
2079 =for apidoc start_glob
2081 Function called by C<do_readline> to spawn a glob (or do the glob inside
2082 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2083 this glob starter is only used by miniperl during the build proccess.
2084 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2090 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2092 SV *tmpcmd = NEWSV(55, 0);
2096 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2097 /* since spawning off a process is a real performance hit */
2099 #include <descrip.h>
2100 #include <lib$routines.h>
2103 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
2104 char vmsspec[NAM$C_MAXRSS+1];
2105 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
2106 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
2109 struct dsc$descriptor_s wilddsc
2110 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2111 struct dsc$descriptor_vs rsdsc
2112 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
2113 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
2115 /* We could find out if there's an explicit dev/dir or version
2116 by peeking into lib$find_file's internal context at
2117 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
2118 but that's unsupported, so I don't want to do it now and
2119 have it bite someone in the future. */
2120 cp = SvPV(tmpglob,i);
2122 if (cp[i] == ';') hasver = 1;
2124 if (sts) hasver = 1;
2128 hasdir = isunix = 1;
2131 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
2136 if ((tmpfp = PerlIO_tmpfile()) != NULL) {
2138 if (!PerlLIO_stat(SvPVX(tmpglob),&st) && S_ISDIR(st.st_mode))
2139 ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL);
2140 else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
2141 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
2142 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
2143 &dfltdsc,NULL,NULL,NULL))&1)) {
2144 end = rstr + (unsigned long int) *rslt;
2145 if (!hasver) while (*end != ';') end--;
2146 *(end++) = '\n'; *end = '\0';
2147 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
2149 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
2154 while (*(--begin) != ']' && *begin != '>') ;
2157 ok = (PerlIO_puts(tmpfp,begin) != EOF);
2159 if (cxt) (void)lib$find_file_end(&cxt);
2160 if (ok && sts != RMS$_NMF &&
2161 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
2164 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
2166 PerlIO_close(tmpfp);
2170 PerlIO_rewind(tmpfp);
2171 IoTYPE(io) = IoTYPE_RDONLY;
2172 IoIFP(io) = fp = tmpfp;
2173 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
2178 #ifdef MACOS_TRADITIONAL
2179 sv_setpv(tmpcmd, "glob ");
2180 sv_catsv(tmpcmd, tmpglob);
2181 sv_catpv(tmpcmd, " |");
2185 sv_setpv(tmpcmd, "for a in ");
2186 sv_catsv(tmpcmd, tmpglob);
2187 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2190 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2191 sv_catsv(tmpcmd, tmpglob);
2193 sv_setpv(tmpcmd, "perlglob ");
2194 sv_catsv(tmpcmd, tmpglob);
2195 sv_catpv(tmpcmd, " |");
2200 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2201 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2202 sv_catsv(tmpcmd, tmpglob);
2203 sv_catpv(tmpcmd, "' 2>/dev/null |");
2205 sv_setpv(tmpcmd, "echo ");
2206 sv_catsv(tmpcmd, tmpglob);
2208 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2210 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2213 #endif /* !DOSISH */
2214 #endif /* MACOS_TRADITIONAL */
2215 (void)do_open(PL_last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
2216 FALSE, O_RDONLY, 0, Nullfp);