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 = SvOK(*svp) ? 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 /* FIXME: This next term is a hack to avoid fileno on PerlIO::Scalar */
517 !(num_svs && SvROK(*svp))) {
518 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
519 (void)PerlIO_close(fp);
522 if (S_ISSOCK(PL_statbuf.st_mode))
523 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
527 !(PL_statbuf.st_mode & S_IFMT)
531 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
532 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
533 ) { /* on OS's that return 0 on fstat()ed pipe */
535 Sock_size_t buflen = sizeof tmpbuf;
536 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
538 || errno != ENOTSOCK)
539 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
540 /* but some return 0 for streams too, sigh */
544 if (saveifp) { /* must use old fp? */
545 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
546 then dup the new fileno down
548 fd = PerlIO_fileno(fp);
550 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
551 if (saveofp != saveifp) { /* was a socket? */
552 PerlIO_close(saveofp);
558 PerlLIO_dup2(fd, savefd);
560 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
561 char newname[FILENAME_MAX+1];
562 if (fgetname(fp, newname)) {
563 if (savefd == PerlIO_fileno(PerlIO_stdout())) Perl_vmssetuserlnm("SYS$OUTPUT", newname);
564 if (savefd == PerlIO_fileno(PerlIO_stderr())) Perl_vmssetuserlnm("SYS$ERROR", newname);
569 sv = *av_fetch(PL_fdpid,fd,TRUE);
570 (void)SvUPGRADE(sv, SVt_IV);
573 sv = *av_fetch(PL_fdpid,savefd,TRUE);
575 (void)SvUPGRADE(sv, SVt_IV);
583 #if defined(HAS_FCNTL) && defined(F_SETFD)
585 int save_errno = errno;
586 fd = PerlIO_fileno(fp);
587 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
593 IoFLAGS(io) &= ~IOf_NOLINE;
595 if (IoTYPE(io) == IoTYPE_SOCKET
596 || (IoTYPE(io) == IoTYPE_WRONLY && S_ISCHR(PL_statbuf.st_mode)) ) {
598 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,mode,PerlIO_fileno(fp),0,0,NULL,num_svs,svp))) {
612 IoTYPE(io) = savetype;
617 Perl_nextargv(pTHX_ register GV *gv)
620 #ifndef FLEXFILENAMES
629 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
630 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
631 IoFLAGS(io) &= ~IOf_START;
633 if (!PL_argvout_stack)
634 PL_argvout_stack = newAV();
635 av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
638 if (PL_filemode & (S_ISUID|S_ISGID)) {
639 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
641 (void)fchmod(PL_lastfd,PL_filemode);
643 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
647 while (av_len(GvAV(gv)) >= 0) {
649 sv = av_shift(GvAV(gv));
651 sv_setsv(GvSV(gv),sv);
652 SvSETMAGIC(GvSV(gv));
653 PL_oldname = SvPVx(GvSV(gv), oldlen);
654 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
656 TAINT_PROPER("inplace open");
657 if (oldlen == 1 && *PL_oldname == '-') {
658 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
659 return IoIFP(GvIOp(gv));
661 #ifndef FLEXFILENAMES
662 filedev = PL_statbuf.st_dev;
663 fileino = PL_statbuf.st_ino;
665 PL_filemode = PL_statbuf.st_mode;
666 fileuid = PL_statbuf.st_uid;
667 filegid = PL_statbuf.st_gid;
668 if (!S_ISREG(PL_filemode)) {
669 if (ckWARN_d(WARN_INPLACE))
670 Perl_warner(aTHX_ WARN_INPLACE,
671 "Can't do inplace edit: %s is not a regular file",
677 char *star = strchr(PL_inplace, '*');
679 char *begin = PL_inplace;
680 sv_setpvn(sv, "", 0);
682 sv_catpvn(sv, begin, star - begin);
683 sv_catpvn(sv, PL_oldname, oldlen);
685 } while ((star = strchr(begin, '*')));
690 sv_catpv(sv,PL_inplace);
692 #ifndef FLEXFILENAMES
693 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
694 && PL_statbuf.st_dev == filedev
695 && PL_statbuf.st_ino == fileino
697 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
701 if (ckWARN_d(WARN_INPLACE))
702 Perl_warner(aTHX_ WARN_INPLACE,
703 "Can't do inplace edit: %s would not be unique",
710 #if !defined(DOSISH) && !defined(__CYGWIN__)
711 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
712 if (ckWARN_d(WARN_INPLACE))
713 Perl_warner(aTHX_ WARN_INPLACE,
714 "Can't rename %s to %s: %s, skipping file",
715 PL_oldname, SvPVX(sv), Strerror(errno) );
721 (void)PerlLIO_unlink(SvPVX(sv));
722 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
723 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
726 (void)UNLINK(SvPVX(sv));
727 if (link(PL_oldname,SvPVX(sv)) < 0) {
728 if (ckWARN_d(WARN_INPLACE))
729 Perl_warner(aTHX_ WARN_INPLACE,
730 "Can't rename %s to %s: %s, skipping file",
731 PL_oldname, SvPVX(sv), Strerror(errno) );
735 (void)UNLINK(PL_oldname);
739 #if !defined(DOSISH) && !defined(AMIGAOS)
740 # ifndef VMS /* Don't delete; use automatic file versioning */
741 if (UNLINK(PL_oldname) < 0) {
742 if (ckWARN_d(WARN_INPLACE))
743 Perl_warner(aTHX_ WARN_INPLACE,
744 "Can't remove %s: %s, skipping file",
745 PL_oldname, Strerror(errno) );
751 Perl_croak(aTHX_ "Can't do inplace edit without backup");
755 sv_setpvn(sv,">",!PL_inplace);
756 sv_catpvn(sv,PL_oldname,oldlen);
757 SETERRNO(0,0); /* in case sprintf set errno */
759 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
760 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
762 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
763 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp))
766 if (ckWARN_d(WARN_INPLACE))
767 Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit on %s: %s",
768 PL_oldname, Strerror(errno) );
772 setdefout(PL_argvoutgv);
773 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
774 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
776 (void)fchmod(PL_lastfd,PL_filemode);
778 # if !(defined(WIN32) && defined(__BORLANDC__))
779 /* Borland runtime creates a readonly file! */
780 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
783 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
785 (void)fchown(PL_lastfd,fileuid,filegid);
788 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
793 return IoIFP(GvIOp(gv));
796 if (ckWARN_d(WARN_INPLACE)) {
798 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
799 && !S_ISREG(PL_statbuf.st_mode))
801 Perl_warner(aTHX_ WARN_INPLACE,
802 "Can't do inplace edit: %s is not a regular file",
806 Perl_warner(aTHX_ WARN_INPLACE, "Can't open %s: %s",
807 PL_oldname, Strerror(eno));
811 if (io && (IoFLAGS(io) & IOf_ARGV))
812 IoFLAGS(io) |= IOf_START;
814 (void)do_close(PL_argvoutgv,FALSE);
815 if (io && (IoFLAGS(io) & IOf_ARGV)
816 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
818 GV *oldout = (GV*)av_pop(PL_argvout_stack);
820 SvREFCNT_dec(oldout);
823 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
830 Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
849 if (PerlProc_pipe(fd) < 0)
851 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
852 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
853 IoIFP(wstio) = IoOFP(wstio);
854 IoTYPE(rstio) = IoTYPE_RDONLY;
855 IoTYPE(wstio) = IoTYPE_WRONLY;
856 if (!IoIFP(rstio) || !IoOFP(wstio)) {
857 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
858 else PerlLIO_close(fd[0]);
859 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
860 else PerlLIO_close(fd[1]);
864 sv_setsv(sv,&PL_sv_yes);
868 sv_setsv(sv,&PL_sv_undef);
873 /* explicit renamed to avoid C++ conflict -- kja */
875 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
882 if (!gv || SvTYPE(gv) != SVt_PVGV) {
884 SETERRNO(EBADF,SS$_IVCHAN);
888 if (!io) { /* never opened */
890 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
891 report_evil_fh(gv, io, PL_op->op_type);
892 SETERRNO(EBADF,SS$_IVCHAN);
896 retval = io_close(io, not_implicit);
900 IoLINES_LEFT(io) = IoPAGE_LEN(io);
902 IoTYPE(io) = IoTYPE_CLOSED;
907 Perl_io_close(pTHX_ IO *io, bool not_implicit)
913 if (IoTYPE(io) == IoTYPE_PIPE) {
914 status = PerlProc_pclose(IoIFP(io));
916 STATUS_NATIVE_SET(status);
917 retval = (STATUS_POSIX == 0);
920 retval = (status != -1);
923 else if (IoTYPE(io) == IoTYPE_STD)
926 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
927 retval = (PerlIO_close(IoOFP(io)) != EOF);
928 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
931 retval = (PerlIO_close(IoIFP(io)) != EOF);
933 IoOFP(io) = IoIFP(io) = Nullfp;
935 else if (not_implicit) {
936 SETERRNO(EBADF,SS$_IVCHAN);
943 Perl_do_eof(pTHX_ GV *gv)
952 else if (ckWARN(WARN_IO) && (IoTYPE(io) == IoTYPE_WRONLY))
954 /* integrate to report_evil_fh()? */
957 SV* sv = sv_newmortal();
958 gv_efullname4(sv, gv, Nullch, FALSE);
959 name = SvPV_nolen(sv);
962 Perl_warner(aTHX_ WARN_IO,
963 "Filehandle %s opened only for output", name);
965 Perl_warner(aTHX_ WARN_IO,
966 "Filehandle opened only for output");
971 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
972 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
973 return FALSE; /* this is the most usual case */
976 ch = PerlIO_getc(IoIFP(io));
978 (void)PerlIO_ungetc(IoIFP(io),ch);
982 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
983 if (PerlIO_get_cnt(IoIFP(io)) < -1)
984 PerlIO_set_cnt(IoIFP(io),-1);
986 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
987 if (!nextargv(PL_argvgv)) /* get another fp handy */
991 return TRUE; /* normal fp, definitely end of file */
997 Perl_do_tell(pTHX_ GV *gv)
1000 register PerlIO *fp;
1002 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1003 #ifdef ULTRIX_STDIO_BOTCH
1005 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1007 return PerlIO_tell(fp);
1009 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1010 report_evil_fh(gv, io, PL_op->op_type);
1011 SETERRNO(EBADF,RMS$_IFI);
1016 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1019 register PerlIO *fp;
1021 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1022 #ifdef ULTRIX_STDIO_BOTCH
1024 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1026 return PerlIO_seek(fp, pos, whence) >= 0;
1028 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1029 report_evil_fh(gv, io, PL_op->op_type);
1030 SETERRNO(EBADF,RMS$_IFI);
1035 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1038 register PerlIO *fp;
1040 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
1041 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1042 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1043 report_evil_fh(gv, io, PL_op->op_type);
1044 SETERRNO(EBADF,RMS$_IFI);
1049 Perl_mode_from_discipline(pTHX_ SV *discp)
1051 int mode = O_BINARY;
1054 char *s = SvPV(discp,len);
1059 if (len > 3 && strnEQ(s+1, "raw", 3)
1060 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1069 if (len > 4 && strnEQ(s+1, "crlf", 4)
1070 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1079 goto fail_discipline;
1082 else if (isSPACE(*s)) {
1089 end = strchr(s+1, ':');
1092 #ifndef PERLIO_LAYERS
1093 Perl_croak(aTHX_ "Unknown discipline '%.*s'", end-s, s);
1104 Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
1106 /* The old body of this is now in non-LAYER part of perlio.c
1107 * This is a stub for any XS code which might have been calling it.
1109 char *name = (O_BINARY != O_TEXT && !(mode & O_BINARY)) ? ":crlf" : ":raw";
1110 return PerlIO_binmode(aTHX_ fp, iotype, mode, name);
1113 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
1114 /* code courtesy of William Kucharski */
1117 I32 my_chsize(fd, length)
1118 I32 fd; /* file descriptor */
1119 Off_t length; /* length to set file to */
1122 struct stat filebuf;
1124 if (PerlLIO_fstat(fd, &filebuf) < 0)
1127 if (filebuf.st_size < length) {
1129 /* extend file length */
1131 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1134 /* write a "0" byte */
1136 if ((PerlLIO_write(fd, "", 1)) != 1)
1140 /* truncate length */
1144 fl.l_start = length;
1145 fl.l_type = F_WRLCK; /* write lock on file space */
1148 * This relies on the UNDOCUMENTED F_FREESP argument to
1149 * fcntl(2), which truncates the file so that it ends at the
1150 * position indicated by fl.l_start.
1152 * Will minor miracles never cease?
1155 if (fcntl(fd, F_FREESP, &fl) < 0)
1162 #endif /* F_FREESP */
1165 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1167 register char *tmps;
1170 /* assuming fp is checked earlier */
1176 if (SvIOK(sv) && SvIVX(sv) != 0) {
1177 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
1178 return !PerlIO_error(fp);
1180 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
1181 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
1182 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
1183 return !PerlIO_error(fp);
1186 switch (SvTYPE(sv)) {
1188 if (ckWARN(WARN_UNINITIALIZED))
1196 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1198 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1199 return !PerlIO_error(fp);
1203 if (PerlIO_isutf8(fp)) {
1205 sv_utf8_upgrade(sv = sv_mortalcopy(sv));
1207 else if (DO_UTF8(sv))
1208 sv_utf8_downgrade((sv = sv_mortalcopy(sv)), FALSE);
1209 tmps = SvPV(sv, len);
1212 /* To detect whether the process is about to overstep its
1213 * filesize limit we would need getrlimit(). We could then
1214 * also transparently raise the limit with setrlimit() --
1215 * but only until the system hard limit/the filesystem limit,
1216 * at which we would get EPERM. Note that when using buffered
1217 * io the write failure can be delayed until the flush/close. --jhi */
1218 if (len && (PerlIO_write(fp,tmps,len) == 0))
1220 return !PerlIO_error(fp);
1230 if (PL_op->op_flags & OPf_REF) {
1235 if (io && IoIFP(io)) {
1237 sv_setpv(PL_statname,"");
1238 PL_laststype = OP_STAT;
1239 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1243 return PL_laststatval;
1244 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1245 report_evil_fh(gv, io, PL_op->op_type);
1247 sv_setpv(PL_statname,"");
1248 return (PL_laststatval = -1);
1256 if (SvTYPE(sv) == SVt_PVGV) {
1260 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1267 sv_setpv(PL_statname, s);
1268 PL_laststype = OP_STAT;
1269 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1270 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1271 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
1272 return PL_laststatval;
1282 if (PL_op->op_flags & OPf_REF) {
1284 if (cGVOP_gv == PL_defgv) {
1285 if (PL_laststype != OP_LSTAT)
1286 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
1287 return PL_laststatval;
1289 Perl_croak(aTHX_ "You can't use -l on a filehandle");
1292 PL_laststype = OP_LSTAT;
1296 sv_setpv(PL_statname,SvPV(sv, n_a));
1297 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
1298 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
1299 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
1300 return PL_laststatval;
1304 Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1306 return do_aexec5(really, mark, sp, 0, 0);
1310 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1311 int fd, int do_report)
1313 #ifdef MACOS_TRADITIONAL
1314 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1321 New(401,PL_Argv, sp - mark + 1, char*);
1323 while (++mark <= sp) {
1325 *a++ = SvPVx(*mark, n_a);
1331 tmps = SvPV(really, n_a);
1332 if ((!really && *PL_Argv[0] != '/') ||
1333 (really && *tmps != '/')) /* will execvp use PATH? */
1334 TAINT_ENV(); /* testing IFS here is overkill, probably */
1335 if (really && *tmps)
1336 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1338 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1339 if (ckWARN(WARN_EXEC))
1340 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1341 (really ? tmps : PL_Argv[0]), Strerror(errno));
1345 PerlLIO_write(fd, (void*)&e, sizeof(int));
1355 Perl_do_execfree(pTHX)
1359 PL_Argv = Null(char **);
1367 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
1370 Perl_do_exec(pTHX_ char *cmd)
1372 return do_exec3(cmd,0,0);
1376 Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1382 while (*cmd && isSPACE(*cmd))
1385 /* save an extra exec if possible */
1388 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1390 s = cmd+PL_cshlen+3;
1404 if (s[-1] == '\'') {
1406 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1414 /* see if there are shell metacharacters in it */
1416 if (*cmd == '.' && isSPACE(cmd[1]))
1419 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1422 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
1426 for (s = cmd; *s; s++) {
1427 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1428 if (*s == '\n' && !s[1]) {
1432 /* handle the 2>&1 construct at the end */
1433 if (*s == '>' && s[1] == '&' && s[2] == '1'
1434 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1435 && (!s[3] || isSPACE(s[3])))
1439 while (*t && isSPACE(*t))
1441 if (!*t && (dup2(1,2) != -1)) {
1447 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1452 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1453 PL_Cmd = savepvn(cmd, s-cmd);
1455 for (s = PL_Cmd; *s;) {
1456 while (*s && isSPACE(*s)) s++;
1459 while (*s && !isSPACE(*s)) s++;
1465 PerlProc_execvp(PL_Argv[0],PL_Argv);
1466 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1473 if (ckWARN(WARN_EXEC))
1474 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1475 PL_Argv[0], Strerror(errno));
1477 PerlLIO_write(fd, (void*)&e, sizeof(int));
1486 #endif /* OS2 || WIN32 */
1489 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1493 register I32 tot = 0;
1496 SV **oldmark = mark;
1499 #define APPLY_TAINT_PROPER() \
1501 if (PL_tainted) { TAINT_PROPER(what); } \
1504 /* This is a first heuristic; it doesn't catch tainting magic. */
1506 while (++mark <= sp) {
1507 if (SvTAINTED(*mark)) {
1517 APPLY_TAINT_PROPER();
1520 APPLY_TAINT_PROPER();
1522 while (++mark <= sp) {
1523 char *name = SvPVx(*mark, n_a);
1524 APPLY_TAINT_PROPER();
1525 if (PerlLIO_chmod(name, val))
1533 APPLY_TAINT_PROPER();
1534 if (sp - mark > 2) {
1535 val = SvIVx(*++mark);
1536 val2 = SvIVx(*++mark);
1537 APPLY_TAINT_PROPER();
1539 while (++mark <= sp) {
1540 char *name = SvPVx(*mark, n_a);
1541 APPLY_TAINT_PROPER();
1542 if (PerlLIO_chown(name, val, val2))
1549 XXX Should we make lchown() directly available from perl?
1550 For now, we'll let Configure test for HAS_LCHOWN, but do
1551 nothing in the core.
1557 APPLY_TAINT_PROPER();
1560 s = SvPVx(*++mark, n_a);
1562 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1564 if (!(val = whichsig(s)))
1565 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1569 APPLY_TAINT_PROPER();
1572 /* kill() doesn't do process groups (job trees?) under VMS */
1573 if (val < 0) val = -val;
1574 if (val == SIGKILL) {
1575 # include <starlet.h>
1576 /* Use native sys$delprc() to insure that target process is
1577 * deleted; supervisor-mode images don't pay attention to
1578 * CRTL's emulation of Unix-style signals and kill()
1580 while (++mark <= sp) {
1581 I32 proc = SvIVx(*mark);
1582 register unsigned long int __vmssts;
1583 APPLY_TAINT_PROPER();
1584 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1588 case SS$_NOSUCHNODE:
1589 SETERRNO(ESRCH,__vmssts);
1592 SETERRNO(EPERM,__vmssts);
1595 SETERRNO(EVMSERR,__vmssts);
1604 while (++mark <= sp) {
1605 I32 proc = SvIVx(*mark);
1606 APPLY_TAINT_PROPER();
1608 if (PerlProc_killpg(proc,val)) /* BSD */
1610 if (PerlProc_kill(-proc,val)) /* SYSV */
1616 while (++mark <= sp) {
1617 I32 proc = SvIVx(*mark);
1618 APPLY_TAINT_PROPER();
1619 if (PerlProc_kill(proc, val))
1627 APPLY_TAINT_PROPER();
1629 while (++mark <= sp) {
1630 s = SvPVx(*mark, n_a);
1631 APPLY_TAINT_PROPER();
1632 if (PL_euid || PL_unsafe) {
1636 else { /* don't let root wipe out directories without -U */
1637 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1649 APPLY_TAINT_PROPER();
1650 if (sp - mark > 2) {
1651 #if defined(I_UTIME) || defined(VMS)
1652 struct utimbuf utbuf;
1660 Zero(&utbuf, sizeof utbuf, char);
1662 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1663 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1665 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1666 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
1668 APPLY_TAINT_PROPER();
1670 while (++mark <= sp) {
1671 char *name = SvPVx(*mark, n_a);
1672 APPLY_TAINT_PROPER();
1673 if (PerlLIO_utime(name, &utbuf))
1684 #undef APPLY_TAINT_PROPER
1687 /* Do the permissions allow some operation? Assumes statcache already set. */
1688 #ifndef VMS /* VMS' cando is in vms.c */
1690 Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register Stat_t *statbufp)
1691 /* Note: we use `effective' both for uids and gids.
1692 * Here we are betting on Uid_t being equal or wider than Gid_t. */
1695 /* [Comments and code from Len Reed]
1696 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1697 * to write-protected files. The execute permission bit is set
1698 * by the Miscrosoft C library stat() function for the following:
1703 * All files and directories are readable.
1704 * Directories and special files, e.g. "CON", cannot be
1706 * [Comment by Tom Dinger -- a directory can have the write-protect
1707 * bit set in the file system, but DOS permits changes to
1708 * the directory anyway. In addition, all bets are off
1709 * here for networked software, such as Novell and
1713 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1714 * too so it will actually look into the files for magic numbers
1716 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1718 #else /* ! DOSISH */
1719 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1720 if (mode == S_IXUSR) {
1721 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1725 return TRUE; /* root reads and writes anything */
1728 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1729 if (statbufp->st_mode & mode)
1730 return TRUE; /* ok as "user" */
1732 else if (ingroup(statbufp->st_gid,effective)) {
1733 if (statbufp->st_mode & mode >> 3)
1734 return TRUE; /* ok as "group" */
1736 else if (statbufp->st_mode & mode >> 6)
1737 return TRUE; /* ok as "other" */
1739 #endif /* ! DOSISH */
1744 Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
1746 #ifdef MACOS_TRADITIONAL
1747 /* This is simply not correct for AppleShare, but fix it yerself. */
1750 if (testgid == (effective ? PL_egid : PL_gid))
1752 #ifdef HAS_GETGROUPS
1757 Groups_t gary[NGROUPS];
1760 anum = getgroups(NGROUPS,gary);
1762 if (gary[anum] == testgid)
1770 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1773 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1778 key = (key_t)SvNVx(*++mark);
1779 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1780 flags = SvIVx(*++mark);
1786 return msgget(key, flags);
1790 return semget(key, n, flags);
1794 return shmget(key, n, flags);
1796 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1798 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1801 return -1; /* should never happen */
1805 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
1809 I32 id, n, cmd, infosize, getinfo;
1812 id = SvIVx(*++mark);
1813 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1814 cmd = SvIVx(*++mark);
1817 getinfo = (cmd == IPC_STAT);
1823 if (cmd == IPC_STAT || cmd == IPC_SET)
1824 infosize = sizeof(struct msqid_ds);
1829 if (cmd == IPC_STAT || cmd == IPC_SET)
1830 infosize = sizeof(struct shmid_ds);
1836 if (cmd == IPC_STAT || cmd == IPC_SET)
1837 infosize = sizeof(struct semid_ds);
1838 else if (cmd == GETALL || cmd == SETALL)
1840 struct semid_ds semds;
1842 #ifdef EXTRA_F_IN_SEMUN_BUF
1843 semun.buff = &semds;
1847 getinfo = (cmd == GETALL);
1848 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1850 infosize = semds.sem_nsems * sizeof(short);
1851 /* "short" is technically wrong but much more portable
1852 than guessing about u_?short(_t)? */
1855 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1859 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1861 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1870 SvPV_force(astr, len);
1871 a = SvGROW(astr, infosize+1);
1875 a = SvPV(astr, len);
1876 if (len != infosize)
1877 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
1886 a = INT2PTR(char *,i); /* ouch */
1893 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1899 union semun unsemds;
1901 #ifdef EXTRA_F_IN_SEMUN_BUF
1902 unsemds.buff = (struct semid_ds *)a;
1904 unsemds.buf = (struct semid_ds *)a;
1906 ret = Semctl(id, n, cmd, unsemds);
1908 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1915 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1919 if (getinfo && ret >= 0) {
1920 SvCUR_set(astr, infosize);
1921 *SvEND(astr) = '\0';
1928 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
1933 I32 id, msize, flags;
1936 id = SvIVx(*++mark);
1938 flags = SvIVx(*++mark);
1939 mbuf = SvPV(mstr, len);
1940 if ((msize = len - sizeof(long)) < 0)
1941 Perl_croak(aTHX_ "Arg too short for msgsnd");
1943 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1945 Perl_croak(aTHX_ "msgsnd not implemented");
1950 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
1956 I32 id, msize, flags, ret;
1959 id = SvIVx(*++mark);
1961 /* suppress warning when reading into undef var --jhi */
1963 sv_setpvn(mstr, "", 0);
1964 msize = SvIVx(*++mark);
1965 mtype = (long)SvIVx(*++mark);
1966 flags = SvIVx(*++mark);
1967 SvPV_force(mstr, len);
1968 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1971 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1973 SvCUR_set(mstr, sizeof(long)+ret);
1974 *SvEND(mstr) = '\0';
1975 #ifndef INCOMPLETE_TAINTS
1976 /* who knows who has been playing with this message? */
1982 Perl_croak(aTHX_ "msgrcv not implemented");
1987 Perl_do_semop(pTHX_ SV **mark, SV **sp)
1995 id = SvIVx(*++mark);
1997 opbuf = SvPV(opstr, opsize);
1998 if (opsize < sizeof(struct sembuf)
1999 || (opsize % sizeof(struct sembuf)) != 0) {
2000 SETERRNO(EINVAL,LIB$_INVARG);
2004 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
2006 Perl_croak(aTHX_ "semop not implemented");
2011 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2016 I32 id, mpos, msize;
2018 struct shmid_ds shmds;
2020 id = SvIVx(*++mark);
2022 mpos = SvIVx(*++mark);
2023 msize = SvIVx(*++mark);
2025 if (shmctl(id, IPC_STAT, &shmds) == -1)
2027 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
2028 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
2031 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2032 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2034 if (optype == OP_SHMREAD) {
2035 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2037 sv_setpvn(mstr, "", 0);
2038 SvPV_force(mstr, len);
2039 mbuf = SvGROW(mstr, msize+1);
2041 Copy(shm + mpos, mbuf, msize, char);
2042 SvCUR_set(mstr, msize);
2043 *SvEND(mstr) = '\0';
2045 #ifndef INCOMPLETE_TAINTS
2046 /* who knows who has been playing with this shared memory? */
2053 mbuf = SvPV(mstr, len);
2054 if ((n = len) > msize)
2056 Copy(mbuf, shm + mpos, n, char);
2058 memzero(shm + mpos + n, msize - n);
2062 Perl_croak(aTHX_ "shm I/O not implemented");
2066 #endif /* SYSV IPC */
2069 =for apidoc start_glob
2071 Function called by C<do_readline> to spawn a glob (or do the glob inside
2072 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2073 this glob starter is only used by miniperl during the build proccess.
2074 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2080 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2082 SV *tmpcmd = NEWSV(55, 0);
2086 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2087 /* since spawning off a process is a real performance hit */
2089 #include <descrip.h>
2090 #include <lib$routines.h>
2093 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
2094 char vmsspec[NAM$C_MAXRSS+1];
2095 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
2096 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
2097 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
2100 struct dsc$descriptor_s wilddsc
2101 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2102 struct dsc$descriptor_vs rsdsc
2103 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
2104 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
2106 /* We could find out if there's an explicit dev/dir or version
2107 by peeking into lib$find_file's internal context at
2108 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
2109 but that's unsupported, so I don't want to do it now and
2110 have it bite someone in the future. */
2111 strcat(tmpfnam,PerlLIO_tmpnam(NULL));
2112 cp = SvPV(tmpglob,i);
2114 if (cp[i] == ';') hasver = 1;
2116 if (sts) hasver = 1;
2120 hasdir = isunix = 1;
2123 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
2128 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
2130 if (!PerlLIO_stat(SvPVX(tmpglob),&st) && S_ISDIR(st.st_mode))
2131 ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL);
2132 else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
2133 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
2134 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
2135 &dfltdsc,NULL,NULL,NULL))&1)) {
2136 end = rstr + (unsigned long int) *rslt;
2137 if (!hasver) while (*end != ';') end--;
2138 *(end++) = '\n'; *end = '\0';
2139 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
2141 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
2146 while (*(--begin) != ']' && *begin != '>') ;
2149 ok = (PerlIO_puts(tmpfp,begin) != EOF);
2151 if (cxt) (void)lib$find_file_end(&cxt);
2152 if (ok && sts != RMS$_NMF &&
2153 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
2156 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
2158 PerlIO_close(tmpfp);
2162 PerlIO_rewind(tmpfp);
2163 IoTYPE(io) = IoTYPE_RDONLY;
2164 IoIFP(io) = fp = tmpfp;
2165 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
2170 #ifdef MACOS_TRADITIONAL
2171 sv_setpv(tmpcmd, "glob ");
2172 sv_catsv(tmpcmd, tmpglob);
2173 sv_catpv(tmpcmd, " |");
2177 sv_setpv(tmpcmd, "for a in ");
2178 sv_catsv(tmpcmd, tmpglob);
2179 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2182 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2183 sv_catsv(tmpcmd, tmpglob);
2185 sv_setpv(tmpcmd, "perlglob ");
2186 sv_catsv(tmpcmd, tmpglob);
2187 sv_catpv(tmpcmd, " |");
2192 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2193 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2194 sv_catsv(tmpcmd, tmpglob);
2195 sv_catpv(tmpcmd, "' 2>/dev/null |");
2197 sv_setpv(tmpcmd, "echo ");
2198 sv_catsv(tmpcmd, tmpglob);
2200 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2202 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2205 #endif /* !DOSISH */
2206 #endif /* MACOS_TRADITIONAL */
2207 (void)do_open(PL_last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
2208 FALSE, O_RDONLY, 0, Nullfp);