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 mode[ix++] = '#'; /* Marker to openn to use numeric "sysopen" */
148 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
149 rawmode |= O_LARGEFILE;
153 #define O_ACCMODE 3 /* Assume traditional implementation */
156 switch (result = rawmode & O_ACCMODE) {
158 IoTYPE(io) = IoTYPE_RDONLY;
161 IoTYPE(io) = IoTYPE_WRONLY;
165 IoTYPE(io) = IoTYPE_RDWR;
168 writing = (result > 0);
170 if (result == O_RDONLY) {
174 else if (rawmode & O_APPEND) {
176 if (result != O_WRONLY)
181 if (result == O_WRONLY)
188 if (rawmode & O_BINARY)
192 namesv = sv_2mortal(newSVpvn(name,strlen(name)));
196 fp = PerlIO_openn(aTHX_ type,mode, -1, rawmode, rawperm, NULL, num_svs, svp);
199 /* Regular (non-sys) open */
205 type = savepvn(name, len);
208 /* Loose trailing white space */
209 while (tend > type && isSPACE(tend[-1]))
212 /* New style explict name, type is just mode and discipline/layer info */
214 name = SvPV(*svp, l) ;
216 name = savepvn(name, len);
219 for (; isSPACE(*type); type++) ;
226 if ((*type == IoTYPE_RDWR) && ((!num_svs || tend > type+1 && tend[-1] != IoTYPE_PIPE))) { /* scary */
231 if (*type == IoTYPE_PIPE) {
233 if (type[1] != IoTYPE_STD) {
235 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
240 for (type++; isSPACE(*type); type++) ;
246 /* command is missing 19990114 */
247 if (ckWARN(WARN_PIPE))
248 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
252 if (strNE(name,"-") || num_svs)
254 TAINT_PROPER("piped open");
255 if (!num_svs && name[len-1] == '|') {
257 if (ckWARN(WARN_PIPE))
258 Perl_warner(aTHX_ WARN_PIPE, "Can't open bidirectional pipe");
267 fp = PerlProc_popen_list(mode, num_svs, svp);
270 fp = PerlProc_popen(name,mode);
273 else if (*type == IoTYPE_WRONLY) {
274 TAINT_PROPER("open");
276 if (*type == IoTYPE_WRONLY) {
277 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
278 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
299 if (!num_svs && !*type && supplied_fp) {
300 /* "<+&" etc. is used by typemaps */
305 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
307 if (num_svs && SvIOK(*svp)) {
310 else if (isDIGIT(*type)) {
312 for (; isSPACE(*type); type++) ;
318 thatio = sv_2io(*svp);
323 for (; isSPACE(*type); type++) ;
324 thatgv = gv_fetchpv(type,FALSE,SVt_PVIO);
325 thatio = GvIO(thatgv);
329 SETERRNO(EINVAL,SS$_IVCHAN);
334 PerlIO *fp = IoIFP(thatio);
335 /* Flush stdio buffer before dup. --mjd
336 * Unfortunately SEEK_CURing 0 seems to
337 * be optimized away on most platforms;
338 * only Solaris and Linux seem to flush
341 /* sfio fails to clear error on next
342 sfwrite, contrary to documentation.
344 if (PerlIO_seek(fp, 0, SEEK_CUR) == -1)
347 /* On the other hand, do all platforms
348 * take gracefully to flushing a read-only
349 * filehandle? Perhaps we should do
350 * fsetpos(src)+fgetpos(dst)? --nik */
352 fd = PerlIO_fileno(fp);
353 /* When dup()ing STDIN, STDOUT or STDERR
354 * explicitly set appropriate access mode */
355 if (IoIFP(thatio) == PerlIO_stdout()
356 || IoIFP(thatio) == PerlIO_stderr())
357 IoTYPE(io) = IoTYPE_WRONLY;
358 else if (IoIFP(thatio) == PerlIO_stdin())
359 IoTYPE(io) = IoTYPE_RDONLY;
360 /* When dup()ing a socket, say result is
362 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
363 IoTYPE(io) = IoTYPE_SOCKET;
369 fd = PerlLIO_dup(fd);
374 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
382 Perl_croak(aTHX_ "More than one argument to '>' open");
385 for (; isSPACE(*type); type++) ;
386 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
389 fp = PerlIO_stdout();
390 IoTYPE(io) = IoTYPE_STD;
394 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
399 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
403 else if (*type == IoTYPE_RDONLY) {
405 Perl_croak(aTHX_ "More than one argument to '<' open");
408 for (type++; isSPACE(*type); type++) ;
418 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
422 IoTYPE(io) = IoTYPE_STD;
426 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
431 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
434 else if ((num_svs && type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
435 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
437 type += 2; /* skip over '-|' */
441 while (tend > type && isSPACE(tend[-1]))
444 for (; isSPACE(*type); type++) ;
449 /* command is missing 19990114 */
450 if (ckWARN(WARN_PIPE))
451 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
455 if (strNE(name,"-") || num_svs)
457 TAINT_PROPER("piped open");
464 fp = PerlProc_popen_list(mode,num_svs,svp);
467 fp = PerlProc_popen(name,mode);
469 IoTYPE(io) = IoTYPE_PIPE;
475 IoTYPE(io) = IoTYPE_RDONLY;
477 for (; isSPACE(*name); name++) ;
483 if (strEQ(name,"-")) {
485 IoTYPE(io) = IoTYPE_STD;
489 namesv = sv_2mortal(newSVpvn(type,strlen(type)));
494 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
499 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == IoTYPE_RDONLY && strchr(name, '\n'))
500 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
504 if (ckWARN(WARN_IO)) {
505 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
506 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
507 Perl_warner(aTHX_ WARN_IO, "'std%s' opened only for input",
508 (fp == PerlIO_stdout()) ? "out" : "err");
510 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
511 Perl_warner(aTHX_ WARN_IO, "'stdin' opened only for output");
515 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD) {
516 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
517 (void)PerlIO_close(fp);
520 if (S_ISSOCK(PL_statbuf.st_mode))
521 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
525 !(PL_statbuf.st_mode & S_IFMT)
529 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
530 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
531 ) { /* on OS's that return 0 on fstat()ed pipe */
533 Sock_size_t buflen = sizeof tmpbuf;
534 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
536 || errno != ENOTSOCK)
537 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
538 /* but some return 0 for streams too, sigh */
542 if (saveifp) { /* must use old fp? */
543 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
544 then dup the new fileno down
546 fd = PerlIO_fileno(fp);
548 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
549 if (saveofp != saveifp) { /* was a socket? */
550 PerlIO_close(saveofp);
556 PerlLIO_dup2(fd, savefd);
558 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
559 char newname[FILENAME_MAX+1];
560 if (fgetname(fp, newname)) {
561 if (savefd == PerlIO_fileno(PerlIO_stdout())) Perl_vmssetuserlnm("SYS$OUTPUT", newname);
562 if (savefd == PerlIO_fileno(PerlIO_stderr())) Perl_vmssetuserlnm("SYS$ERROR", newname);
567 sv = *av_fetch(PL_fdpid,fd,TRUE);
568 (void)SvUPGRADE(sv, SVt_IV);
571 sv = *av_fetch(PL_fdpid,savefd,TRUE);
573 (void)SvUPGRADE(sv, SVt_IV);
581 #if defined(HAS_FCNTL) && defined(F_SETFD)
583 int save_errno = errno;
584 fd = PerlIO_fileno(fp);
585 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
591 IoFLAGS(io) &= ~IOf_NOLINE;
593 if (IoTYPE(io) == IoTYPE_SOCKET
594 || (IoTYPE(io) == IoTYPE_WRONLY && S_ISCHR(PL_statbuf.st_mode)) ) {
596 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,mode,PerlIO_fileno(fp),0,0,NULL,num_svs,svp))) {
610 IoTYPE(io) = savetype;
615 Perl_nextargv(pTHX_ register GV *gv)
618 #ifndef FLEXFILENAMES
627 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
628 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
629 IoFLAGS(io) &= ~IOf_START;
631 if (!PL_argvout_stack)
632 PL_argvout_stack = newAV();
633 av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
636 if (PL_filemode & (S_ISUID|S_ISGID)) {
637 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
639 (void)fchmod(PL_lastfd,PL_filemode);
641 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
645 while (av_len(GvAV(gv)) >= 0) {
647 sv = av_shift(GvAV(gv));
649 sv_setsv(GvSV(gv),sv);
650 SvSETMAGIC(GvSV(gv));
651 PL_oldname = SvPVx(GvSV(gv), oldlen);
652 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
654 TAINT_PROPER("inplace open");
655 if (oldlen == 1 && *PL_oldname == '-') {
656 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
657 return IoIFP(GvIOp(gv));
659 #ifndef FLEXFILENAMES
660 filedev = PL_statbuf.st_dev;
661 fileino = PL_statbuf.st_ino;
663 PL_filemode = PL_statbuf.st_mode;
664 fileuid = PL_statbuf.st_uid;
665 filegid = PL_statbuf.st_gid;
666 if (!S_ISREG(PL_filemode)) {
667 if (ckWARN_d(WARN_INPLACE))
668 Perl_warner(aTHX_ WARN_INPLACE,
669 "Can't do inplace edit: %s is not a regular file",
675 char *star = strchr(PL_inplace, '*');
677 char *begin = PL_inplace;
678 sv_setpvn(sv, "", 0);
680 sv_catpvn(sv, begin, star - begin);
681 sv_catpvn(sv, PL_oldname, oldlen);
683 } while ((star = strchr(begin, '*')));
688 sv_catpv(sv,PL_inplace);
690 #ifndef FLEXFILENAMES
691 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
692 && PL_statbuf.st_dev == filedev
693 && PL_statbuf.st_ino == fileino
695 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
699 if (ckWARN_d(WARN_INPLACE))
700 Perl_warner(aTHX_ WARN_INPLACE,
701 "Can't do inplace edit: %s would not be unique",
708 #if !defined(DOSISH) && !defined(__CYGWIN__)
709 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
710 if (ckWARN_d(WARN_INPLACE))
711 Perl_warner(aTHX_ WARN_INPLACE,
712 "Can't rename %s to %s: %s, skipping file",
713 PL_oldname, SvPVX(sv), Strerror(errno) );
719 (void)PerlLIO_unlink(SvPVX(sv));
720 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
721 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
724 (void)UNLINK(SvPVX(sv));
725 if (link(PL_oldname,SvPVX(sv)) < 0) {
726 if (ckWARN_d(WARN_INPLACE))
727 Perl_warner(aTHX_ WARN_INPLACE,
728 "Can't rename %s to %s: %s, skipping file",
729 PL_oldname, SvPVX(sv), Strerror(errno) );
733 (void)UNLINK(PL_oldname);
737 #if !defined(DOSISH) && !defined(AMIGAOS)
738 # ifndef VMS /* Don't delete; use automatic file versioning */
739 if (UNLINK(PL_oldname) < 0) {
740 if (ckWARN_d(WARN_INPLACE))
741 Perl_warner(aTHX_ WARN_INPLACE,
742 "Can't remove %s: %s, skipping file",
743 PL_oldname, Strerror(errno) );
749 Perl_croak(aTHX_ "Can't do inplace edit without backup");
753 sv_setpvn(sv,">",!PL_inplace);
754 sv_catpvn(sv,PL_oldname,oldlen);
755 SETERRNO(0,0); /* in case sprintf set errno */
757 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
758 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
760 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
761 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp))
764 if (ckWARN_d(WARN_INPLACE))
765 Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit on %s: %s",
766 PL_oldname, Strerror(errno) );
770 setdefout(PL_argvoutgv);
771 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
772 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
774 (void)fchmod(PL_lastfd,PL_filemode);
776 # if !(defined(WIN32) && defined(__BORLANDC__))
777 /* Borland runtime creates a readonly file! */
778 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
781 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
783 (void)fchown(PL_lastfd,fileuid,filegid);
786 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
791 return IoIFP(GvIOp(gv));
794 if (ckWARN_d(WARN_INPLACE)) {
796 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
797 && !S_ISREG(PL_statbuf.st_mode))
799 Perl_warner(aTHX_ WARN_INPLACE,
800 "Can't do inplace edit: %s is not a regular file",
804 Perl_warner(aTHX_ WARN_INPLACE, "Can't open %s: %s",
805 PL_oldname, Strerror(eno));
809 if (io && (IoFLAGS(io) & IOf_ARGV))
810 IoFLAGS(io) |= IOf_START;
812 (void)do_close(PL_argvoutgv,FALSE);
813 if (io && (IoFLAGS(io) & IOf_ARGV)
814 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
816 GV *oldout = (GV*)av_pop(PL_argvout_stack);
818 SvREFCNT_dec(oldout);
821 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
828 Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
847 if (PerlProc_pipe(fd) < 0)
849 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
850 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
851 IoIFP(wstio) = IoOFP(wstio);
852 IoTYPE(rstio) = IoTYPE_RDONLY;
853 IoTYPE(wstio) = IoTYPE_WRONLY;
854 if (!IoIFP(rstio) || !IoOFP(wstio)) {
855 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
856 else PerlLIO_close(fd[0]);
857 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
858 else PerlLIO_close(fd[1]);
862 sv_setsv(sv,&PL_sv_yes);
866 sv_setsv(sv,&PL_sv_undef);
871 /* explicit renamed to avoid C++ conflict -- kja */
873 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
880 if (!gv || SvTYPE(gv) != SVt_PVGV) {
882 SETERRNO(EBADF,SS$_IVCHAN);
886 if (!io) { /* never opened */
888 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
889 report_evil_fh(gv, io, PL_op->op_type);
890 SETERRNO(EBADF,SS$_IVCHAN);
894 retval = io_close(io, not_implicit);
898 IoLINES_LEFT(io) = IoPAGE_LEN(io);
900 IoTYPE(io) = IoTYPE_CLOSED;
905 Perl_io_close(pTHX_ IO *io, bool not_implicit)
911 if (IoTYPE(io) == IoTYPE_PIPE) {
912 status = PerlProc_pclose(IoIFP(io));
914 STATUS_NATIVE_SET(status);
915 retval = (STATUS_POSIX == 0);
918 retval = (status != -1);
921 else if (IoTYPE(io) == IoTYPE_STD)
924 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
925 retval = (PerlIO_close(IoOFP(io)) != EOF);
926 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
929 retval = (PerlIO_close(IoIFP(io)) != EOF);
931 IoOFP(io) = IoIFP(io) = Nullfp;
933 else if (not_implicit) {
934 SETERRNO(EBADF,SS$_IVCHAN);
941 Perl_do_eof(pTHX_ GV *gv)
950 else if (ckWARN(WARN_IO) && (IoTYPE(io) == IoTYPE_WRONLY))
952 /* integrate to report_evil_fh()? */
955 SV* sv = sv_newmortal();
956 gv_efullname4(sv, gv, Nullch, FALSE);
957 name = SvPV_nolen(sv);
960 Perl_warner(aTHX_ WARN_IO,
961 "Filehandle %s opened only for output", name);
963 Perl_warner(aTHX_ WARN_IO,
964 "Filehandle opened only for output");
969 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
970 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
971 return FALSE; /* this is the most usual case */
974 ch = PerlIO_getc(IoIFP(io));
976 (void)PerlIO_ungetc(IoIFP(io),ch);
980 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
981 if (PerlIO_get_cnt(IoIFP(io)) < -1)
982 PerlIO_set_cnt(IoIFP(io),-1);
984 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
985 if (!nextargv(PL_argvgv)) /* get another fp handy */
989 return TRUE; /* normal fp, definitely end of file */
995 Perl_do_tell(pTHX_ GV *gv)
1000 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1001 #ifdef ULTRIX_STDIO_BOTCH
1003 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1005 return PerlIO_tell(fp);
1007 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1008 report_evil_fh(gv, io, PL_op->op_type);
1009 SETERRNO(EBADF,RMS$_IFI);
1014 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1017 register PerlIO *fp;
1019 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1020 #ifdef ULTRIX_STDIO_BOTCH
1022 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1024 return PerlIO_seek(fp, pos, whence) >= 0;
1026 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1027 report_evil_fh(gv, io, PL_op->op_type);
1028 SETERRNO(EBADF,RMS$_IFI);
1033 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1036 register PerlIO *fp;
1038 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
1039 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1040 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1041 report_evil_fh(gv, io, PL_op->op_type);
1042 SETERRNO(EBADF,RMS$_IFI);
1047 Perl_mode_from_discipline(pTHX_ SV *discp)
1049 int mode = O_BINARY;
1052 char *s = SvPV(discp,len);
1057 if (len > 3 && strnEQ(s+1, "raw", 3)
1058 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1067 if (len > 4 && strnEQ(s+1, "crlf", 4)
1068 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1077 goto fail_discipline;
1080 else if (isSPACE(*s)) {
1087 end = strchr(s+1, ':');
1090 #ifndef PERLIO_LAYERS
1091 Perl_croak(aTHX_ "Unknown discipline '%.*s'", end-s, s);
1102 Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
1104 /* The old body of this is now in non-LAYER part of perlio.c
1105 * This is a stub for any XS code which might have been calling it.
1107 char *name = (O_BINARY != O_TEXT && !(mode & O_BINARY)) ? ":crlf" : ":raw";
1108 return PerlIO_binmode(aTHX_ fp, iotype, mode, name);
1111 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
1112 /* code courtesy of William Kucharski */
1115 I32 my_chsize(fd, length)
1116 I32 fd; /* file descriptor */
1117 Off_t length; /* length to set file to */
1120 struct stat filebuf;
1122 if (PerlLIO_fstat(fd, &filebuf) < 0)
1125 if (filebuf.st_size < length) {
1127 /* extend file length */
1129 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1132 /* write a "0" byte */
1134 if ((PerlLIO_write(fd, "", 1)) != 1)
1138 /* truncate length */
1142 fl.l_start = length;
1143 fl.l_type = F_WRLCK; /* write lock on file space */
1146 * This relies on the UNDOCUMENTED F_FREESP argument to
1147 * fcntl(2), which truncates the file so that it ends at the
1148 * position indicated by fl.l_start.
1150 * Will minor miracles never cease?
1153 if (fcntl(fd, F_FREESP, &fl) < 0)
1160 #endif /* F_FREESP */
1163 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1165 register char *tmps;
1168 /* assuming fp is checked earlier */
1174 if (SvIOK(sv) && SvIVX(sv) != 0) {
1175 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
1176 return !PerlIO_error(fp);
1178 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
1179 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
1180 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
1181 return !PerlIO_error(fp);
1184 switch (SvTYPE(sv)) {
1186 if (ckWARN(WARN_UNINITIALIZED))
1194 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1196 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1197 return !PerlIO_error(fp);
1201 if (PerlIO_isutf8(fp)) {
1203 sv_utf8_upgrade(sv = sv_mortalcopy(sv));
1205 else if (DO_UTF8(sv))
1206 sv_utf8_downgrade((sv = sv_mortalcopy(sv)), FALSE);
1207 tmps = SvPV(sv, len);
1210 /* To detect whether the process is about to overstep its
1211 * filesize limit we would need getrlimit(). We could then
1212 * also transparently raise the limit with setrlimit() --
1213 * but only until the system hard limit/the filesystem limit,
1214 * at which we would get EPERM. Note that when using buffered
1215 * io the write failure can be delayed until the flush/close. --jhi */
1216 if (len && (PerlIO_write(fp,tmps,len) == 0))
1218 return !PerlIO_error(fp);
1228 if (PL_op->op_flags & OPf_REF) {
1233 if (io && IoIFP(io)) {
1235 sv_setpv(PL_statname,"");
1236 PL_laststype = OP_STAT;
1237 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1241 return PL_laststatval;
1242 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1243 report_evil_fh(gv, io, PL_op->op_type);
1245 sv_setpv(PL_statname,"");
1246 return (PL_laststatval = -1);
1254 if (SvTYPE(sv) == SVt_PVGV) {
1258 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1265 sv_setpv(PL_statname, s);
1266 PL_laststype = OP_STAT;
1267 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1268 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1269 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
1270 return PL_laststatval;
1280 if (PL_op->op_flags & OPf_REF) {
1282 if (cGVOP_gv == PL_defgv) {
1283 if (PL_laststype != OP_LSTAT)
1284 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
1285 return PL_laststatval;
1287 Perl_croak(aTHX_ "You can't use -l on a filehandle");
1290 PL_laststype = OP_LSTAT;
1294 sv_setpv(PL_statname,SvPV(sv, n_a));
1295 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
1296 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
1297 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
1298 return PL_laststatval;
1302 Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1304 return do_aexec5(really, mark, sp, 0, 0);
1308 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1309 int fd, int do_report)
1311 #ifdef MACOS_TRADITIONAL
1312 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1319 New(401,PL_Argv, sp - mark + 1, char*);
1321 while (++mark <= sp) {
1323 *a++ = SvPVx(*mark, n_a);
1329 tmps = SvPV(really, n_a);
1330 if ((!really && *PL_Argv[0] != '/') ||
1331 (really && *tmps != '/')) /* will execvp use PATH? */
1332 TAINT_ENV(); /* testing IFS here is overkill, probably */
1333 if (really && *tmps)
1334 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1336 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1337 if (ckWARN(WARN_EXEC))
1338 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1339 (really ? tmps : PL_Argv[0]), Strerror(errno));
1343 PerlLIO_write(fd, (void*)&e, sizeof(int));
1353 Perl_do_execfree(pTHX)
1357 PL_Argv = Null(char **);
1365 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
1368 Perl_do_exec(pTHX_ char *cmd)
1370 return do_exec3(cmd,0,0);
1374 Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1380 while (*cmd && isSPACE(*cmd))
1383 /* save an extra exec if possible */
1386 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1388 s = cmd+PL_cshlen+3;
1402 if (s[-1] == '\'') {
1404 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1412 /* see if there are shell metacharacters in it */
1414 if (*cmd == '.' && isSPACE(cmd[1]))
1417 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1420 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
1424 for (s = cmd; *s; s++) {
1425 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1426 if (*s == '\n' && !s[1]) {
1430 /* handle the 2>&1 construct at the end */
1431 if (*s == '>' && s[1] == '&' && s[2] == '1'
1432 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1433 && (!s[3] || isSPACE(s[3])))
1437 while (*t && isSPACE(*t))
1439 if (!*t && (dup2(1,2) != -1)) {
1445 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1450 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1451 PL_Cmd = savepvn(cmd, s-cmd);
1453 for (s = PL_Cmd; *s;) {
1454 while (*s && isSPACE(*s)) s++;
1457 while (*s && !isSPACE(*s)) s++;
1463 PerlProc_execvp(PL_Argv[0],PL_Argv);
1464 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1471 if (ckWARN(WARN_EXEC))
1472 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1473 PL_Argv[0], Strerror(errno));
1475 PerlLIO_write(fd, (void*)&e, sizeof(int));
1484 #endif /* OS2 || WIN32 */
1487 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1491 register I32 tot = 0;
1494 SV **oldmark = mark;
1497 #define APPLY_TAINT_PROPER() \
1499 if (PL_tainted) { TAINT_PROPER(what); } \
1502 /* This is a first heuristic; it doesn't catch tainting magic. */
1504 while (++mark <= sp) {
1505 if (SvTAINTED(*mark)) {
1515 APPLY_TAINT_PROPER();
1518 APPLY_TAINT_PROPER();
1520 while (++mark <= sp) {
1521 char *name = SvPVx(*mark, n_a);
1522 APPLY_TAINT_PROPER();
1523 if (PerlLIO_chmod(name, val))
1531 APPLY_TAINT_PROPER();
1532 if (sp - mark > 2) {
1533 val = SvIVx(*++mark);
1534 val2 = SvIVx(*++mark);
1535 APPLY_TAINT_PROPER();
1537 while (++mark <= sp) {
1538 char *name = SvPVx(*mark, n_a);
1539 APPLY_TAINT_PROPER();
1540 if (PerlLIO_chown(name, val, val2))
1547 XXX Should we make lchown() directly available from perl?
1548 For now, we'll let Configure test for HAS_LCHOWN, but do
1549 nothing in the core.
1555 APPLY_TAINT_PROPER();
1558 s = SvPVx(*++mark, n_a);
1560 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1562 if (!(val = whichsig(s)))
1563 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1567 APPLY_TAINT_PROPER();
1570 /* kill() doesn't do process groups (job trees?) under VMS */
1571 if (val < 0) val = -val;
1572 if (val == SIGKILL) {
1573 # include <starlet.h>
1574 /* Use native sys$delprc() to insure that target process is
1575 * deleted; supervisor-mode images don't pay attention to
1576 * CRTL's emulation of Unix-style signals and kill()
1578 while (++mark <= sp) {
1579 I32 proc = SvIVx(*mark);
1580 register unsigned long int __vmssts;
1581 APPLY_TAINT_PROPER();
1582 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1586 case SS$_NOSUCHNODE:
1587 SETERRNO(ESRCH,__vmssts);
1590 SETERRNO(EPERM,__vmssts);
1593 SETERRNO(EVMSERR,__vmssts);
1602 while (++mark <= sp) {
1603 I32 proc = SvIVx(*mark);
1604 APPLY_TAINT_PROPER();
1606 if (PerlProc_killpg(proc,val)) /* BSD */
1608 if (PerlProc_kill(-proc,val)) /* SYSV */
1614 while (++mark <= sp) {
1615 I32 proc = SvIVx(*mark);
1616 APPLY_TAINT_PROPER();
1617 if (PerlProc_kill(proc, val))
1625 APPLY_TAINT_PROPER();
1627 while (++mark <= sp) {
1628 s = SvPVx(*mark, n_a);
1629 APPLY_TAINT_PROPER();
1630 if (PL_euid || PL_unsafe) {
1634 else { /* don't let root wipe out directories without -U */
1635 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1647 APPLY_TAINT_PROPER();
1648 if (sp - mark > 2) {
1649 #if defined(I_UTIME) || defined(VMS)
1650 struct utimbuf utbuf;
1658 Zero(&utbuf, sizeof utbuf, char);
1660 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1661 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1663 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1664 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
1666 APPLY_TAINT_PROPER();
1668 while (++mark <= sp) {
1669 char *name = SvPVx(*mark, n_a);
1670 APPLY_TAINT_PROPER();
1671 if (PerlLIO_utime(name, &utbuf))
1682 #undef APPLY_TAINT_PROPER
1685 /* Do the permissions allow some operation? Assumes statcache already set. */
1686 #ifndef VMS /* VMS' cando is in vms.c */
1688 Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register Stat_t *statbufp)
1689 /* Note: we use `effective' both for uids and gids.
1690 * Here we are betting on Uid_t being equal or wider than Gid_t. */
1693 /* [Comments and code from Len Reed]
1694 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1695 * to write-protected files. The execute permission bit is set
1696 * by the Miscrosoft C library stat() function for the following:
1701 * All files and directories are readable.
1702 * Directories and special files, e.g. "CON", cannot be
1704 * [Comment by Tom Dinger -- a directory can have the write-protect
1705 * bit set in the file system, but DOS permits changes to
1706 * the directory anyway. In addition, all bets are off
1707 * here for networked software, such as Novell and
1711 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1712 * too so it will actually look into the files for magic numbers
1714 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1716 #else /* ! DOSISH */
1717 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1718 if (mode == S_IXUSR) {
1719 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1723 return TRUE; /* root reads and writes anything */
1726 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1727 if (statbufp->st_mode & mode)
1728 return TRUE; /* ok as "user" */
1730 else if (ingroup(statbufp->st_gid,effective)) {
1731 if (statbufp->st_mode & mode >> 3)
1732 return TRUE; /* ok as "group" */
1734 else if (statbufp->st_mode & mode >> 6)
1735 return TRUE; /* ok as "other" */
1737 #endif /* ! DOSISH */
1742 Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
1744 #ifdef MACOS_TRADITIONAL
1745 /* This is simply not correct for AppleShare, but fix it yerself. */
1748 if (testgid == (effective ? PL_egid : PL_gid))
1750 #ifdef HAS_GETGROUPS
1755 Groups_t gary[NGROUPS];
1758 anum = getgroups(NGROUPS,gary);
1760 if (gary[anum] == testgid)
1768 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1771 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1776 key = (key_t)SvNVx(*++mark);
1777 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1778 flags = SvIVx(*++mark);
1784 return msgget(key, flags);
1788 return semget(key, n, flags);
1792 return shmget(key, n, flags);
1794 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1796 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1799 return -1; /* should never happen */
1803 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
1807 I32 id, n, cmd, infosize, getinfo;
1810 id = SvIVx(*++mark);
1811 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1812 cmd = SvIVx(*++mark);
1815 getinfo = (cmd == IPC_STAT);
1821 if (cmd == IPC_STAT || cmd == IPC_SET)
1822 infosize = sizeof(struct msqid_ds);
1827 if (cmd == IPC_STAT || cmd == IPC_SET)
1828 infosize = sizeof(struct shmid_ds);
1834 if (cmd == IPC_STAT || cmd == IPC_SET)
1835 infosize = sizeof(struct semid_ds);
1836 else if (cmd == GETALL || cmd == SETALL)
1838 struct semid_ds semds;
1840 #ifdef EXTRA_F_IN_SEMUN_BUF
1841 semun.buff = &semds;
1845 getinfo = (cmd == GETALL);
1846 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1848 infosize = semds.sem_nsems * sizeof(short);
1849 /* "short" is technically wrong but much more portable
1850 than guessing about u_?short(_t)? */
1853 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1857 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1859 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1868 SvPV_force(astr, len);
1869 a = SvGROW(astr, infosize+1);
1873 a = SvPV(astr, len);
1874 if (len != infosize)
1875 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
1884 a = INT2PTR(char *,i); /* ouch */
1891 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1897 union semun unsemds;
1899 #ifdef EXTRA_F_IN_SEMUN_BUF
1900 unsemds.buff = (struct semid_ds *)a;
1902 unsemds.buf = (struct semid_ds *)a;
1904 ret = Semctl(id, n, cmd, unsemds);
1906 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1913 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1917 if (getinfo && ret >= 0) {
1918 SvCUR_set(astr, infosize);
1919 *SvEND(astr) = '\0';
1926 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
1931 I32 id, msize, flags;
1934 id = SvIVx(*++mark);
1936 flags = SvIVx(*++mark);
1937 mbuf = SvPV(mstr, len);
1938 if ((msize = len - sizeof(long)) < 0)
1939 Perl_croak(aTHX_ "Arg too short for msgsnd");
1941 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1943 Perl_croak(aTHX_ "msgsnd not implemented");
1948 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
1954 I32 id, msize, flags, ret;
1957 id = SvIVx(*++mark);
1959 /* suppress warning when reading into undef var --jhi */
1961 sv_setpvn(mstr, "", 0);
1962 msize = SvIVx(*++mark);
1963 mtype = (long)SvIVx(*++mark);
1964 flags = SvIVx(*++mark);
1965 SvPV_force(mstr, len);
1966 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1969 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1971 SvCUR_set(mstr, sizeof(long)+ret);
1972 *SvEND(mstr) = '\0';
1973 #ifndef INCOMPLETE_TAINTS
1974 /* who knows who has been playing with this message? */
1980 Perl_croak(aTHX_ "msgrcv not implemented");
1985 Perl_do_semop(pTHX_ SV **mark, SV **sp)
1993 id = SvIVx(*++mark);
1995 opbuf = SvPV(opstr, opsize);
1996 if (opsize < sizeof(struct sembuf)
1997 || (opsize % sizeof(struct sembuf)) != 0) {
1998 SETERRNO(EINVAL,LIB$_INVARG);
2002 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
2004 Perl_croak(aTHX_ "semop not implemented");
2009 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2014 I32 id, mpos, msize;
2016 struct shmid_ds shmds;
2018 id = SvIVx(*++mark);
2020 mpos = SvIVx(*++mark);
2021 msize = SvIVx(*++mark);
2023 if (shmctl(id, IPC_STAT, &shmds) == -1)
2025 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
2026 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
2029 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2030 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2032 if (optype == OP_SHMREAD) {
2033 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2035 sv_setpvn(mstr, "", 0);
2036 SvPV_force(mstr, len);
2037 mbuf = SvGROW(mstr, msize+1);
2039 Copy(shm + mpos, mbuf, msize, char);
2040 SvCUR_set(mstr, msize);
2041 *SvEND(mstr) = '\0';
2043 #ifndef INCOMPLETE_TAINTS
2044 /* who knows who has been playing with this shared memory? */
2051 mbuf = SvPV(mstr, len);
2052 if ((n = len) > msize)
2054 Copy(mbuf, shm + mpos, n, char);
2056 memzero(shm + mpos + n, msize - n);
2060 Perl_croak(aTHX_ "shm I/O not implemented");
2064 #endif /* SYSV IPC */
2067 =for apidoc start_glob
2069 Function called by C<do_readline> to spawn a glob (or do the glob inside
2070 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2071 this glob starter is only used by miniperl during the build proccess.
2072 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2078 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2080 SV *tmpcmd = NEWSV(55, 0);
2084 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2085 /* since spawning off a process is a real performance hit */
2087 #include <descrip.h>
2088 #include <lib$routines.h>
2091 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
2092 char vmsspec[NAM$C_MAXRSS+1];
2093 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
2094 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
2095 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
2098 struct dsc$descriptor_s wilddsc
2099 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2100 struct dsc$descriptor_vs rsdsc
2101 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
2102 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
2104 /* We could find out if there's an explicit dev/dir or version
2105 by peeking into lib$find_file's internal context at
2106 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
2107 but that's unsupported, so I don't want to do it now and
2108 have it bite someone in the future. */
2109 strcat(tmpfnam,PerlLIO_tmpnam(NULL));
2110 cp = SvPV(tmpglob,i);
2112 if (cp[i] == ';') hasver = 1;
2114 if (sts) hasver = 1;
2118 hasdir = isunix = 1;
2121 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
2126 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
2128 if (!PerlLIO_stat(SvPVX(tmpglob),&st) && S_ISDIR(st.st_mode))
2129 ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL);
2130 else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
2131 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
2132 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
2133 &dfltdsc,NULL,NULL,NULL))&1)) {
2134 end = rstr + (unsigned long int) *rslt;
2135 if (!hasver) while (*end != ';') end--;
2136 *(end++) = '\n'; *end = '\0';
2137 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
2139 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
2144 while (*(--begin) != ']' && *begin != '>') ;
2147 ok = (PerlIO_puts(tmpfp,begin) != EOF);
2149 if (cxt) (void)lib$find_file_end(&cxt);
2150 if (ok && sts != RMS$_NMF &&
2151 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
2154 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
2156 PerlIO_close(tmpfp);
2160 PerlIO_rewind(tmpfp);
2161 IoTYPE(io) = IoTYPE_RDONLY;
2162 IoIFP(io) = fp = tmpfp;
2163 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
2168 #ifdef MACOS_TRADITIONAL
2169 sv_setpv(tmpcmd, "glob ");
2170 sv_catsv(tmpcmd, tmpglob);
2171 sv_catpv(tmpcmd, " |");
2175 sv_setpv(tmpcmd, "for a in ");
2176 sv_catsv(tmpcmd, tmpglob);
2177 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2180 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2181 sv_catsv(tmpcmd, tmpglob);
2183 sv_setpv(tmpcmd, "perlglob ");
2184 sv_catsv(tmpcmd, tmpglob);
2185 sv_catpv(tmpcmd, " |");
2190 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2191 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2192 sv_catsv(tmpcmd, tmpglob);
2193 sv_catpv(tmpcmd, "' 2>/dev/null |");
2195 sv_setpv(tmpcmd, "echo ");
2196 sv_catsv(tmpcmd, tmpglob);
2198 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2200 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2203 #endif /* !DOSISH */
2204 #endif /* MACOS_TRADITIONAL */
2205 (void)do_open(PL_last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
2206 FALSE, O_RDONLY, 0, Nullfp);