3 * Copyright (c) 1991-2000, 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)
54 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
60 Perl_do_open(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
61 int rawmode, int rawperm, PerlIO *supplied_fp)
63 return do_open9(gv, name, len, as_raw, rawmode, rawperm,
64 supplied_fp, Nullsv, 0);
68 Perl_do_open9(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
69 int rawmode, int rawperm, PerlIO *supplied_fp, SV *svs,
72 register IO *io = GvIOn(gv);
73 PerlIO *saveifp = Nullfp;
74 PerlIO *saveofp = Nullfp;
75 char savetype = IoTYPE_CLOSED;
80 bool was_fdopen = FALSE;
81 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
84 char mode[4]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */
86 Zero(mode,sizeof(mode),char);
87 PL_forkprocess = 1; /* assume true if no fork */
89 /* Collect default raw/crlf info from the op */
90 if (PL_op && PL_op->op_type == OP_OPEN) {
91 /* set up disciplines */
92 U8 flags = PL_op->op_private;
93 in_raw = (flags & OPpOPEN_IN_RAW);
94 in_crlf = (flags & OPpOPEN_IN_CRLF);
95 out_raw = (flags & OPpOPEN_OUT_RAW);
96 out_crlf = (flags & OPpOPEN_OUT_CRLF);
99 /* If currently open - close before we re-open */
101 fd = PerlIO_fileno(IoIFP(io));
102 if (IoTYPE(io) == IoTYPE_STD)
104 else if (fd <= PL_maxsysfd) {
107 savetype = IoTYPE(io);
110 else if (IoTYPE(io) == IoTYPE_PIPE)
111 result = PerlProc_pclose(IoIFP(io));
112 else if (IoIFP(io) != IoOFP(io)) {
114 result = PerlIO_close(IoOFP(io));
115 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
118 result = PerlIO_close(IoIFP(io));
121 result = PerlIO_close(IoIFP(io));
122 if (result == EOF && fd > PL_maxsysfd)
123 PerlIO_printf(Perl_error_log,
124 "Warning: unable to close filehandle %s properly.\n",
126 IoOFP(io) = IoIFP(io) = Nullfp;
130 /* sysopen style args, i.e. integer mode and permissions */
132 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
133 rawmode |= O_LARGEFILE;
137 #define O_ACCMODE 3 /* Assume traditional implementation */
140 switch (result = rawmode & O_ACCMODE) {
142 IoTYPE(io) = IoTYPE_RDONLY;
145 IoTYPE(io) = IoTYPE_WRONLY;
149 IoTYPE(io) = IoTYPE_RDWR;
153 writing = (result > 0);
154 fd = PerlLIO_open3(name, rawmode, rawperm);
160 if (result == O_RDONLY) {
164 else if (rawmode & O_APPEND) {
166 if (result != O_WRONLY)
171 if (result == O_WRONLY)
178 if (rawmode & O_BINARY)
181 fp = PerlIO_fdopen(fd, mode);
187 /* Regular (non-sys) open */
193 type = savepvn(name, len);
196 /* Loose trailing white space */
197 while (tend > type && isSPACE(tend[-1]))
200 /* New style explict name, type is just mode and discipline/layer info */
202 name = SvPV(svs, l) ;
204 name = savepvn(name, len);
207 for (; isSPACE(*type); type++) ;
214 if (*type == IoTYPE_RDWR && (!num_svs || tend > type+1 && tend[-1] != IoTYPE_PIPE)) { /* scary */
219 if (*type == IoTYPE_PIPE) {
221 if (type[1] != IoTYPE_STD) {
223 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
228 for (type++; isSPACE(*type); type++) ;
233 if (*name == '\0') { /* command is missing 19990114 */
235 if (ckWARN(WARN_PIPE))
236 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
240 if (strNE(name,"-") || num_svs)
242 TAINT_PROPER("piped open");
243 if (!num_svs && name[len-1] == '|') {
246 if (ckWARN(WARN_PIPE))
247 Perl_warner(aTHX_ WARN_PIPE, "Can't open bidirectional pipe");
255 fp = PerlProc_popen(name,mode);
257 else if (*type == IoTYPE_WRONLY) {
258 TAINT_PROPER("open");
260 if (*type == IoTYPE_WRONLY) {
261 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
262 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
285 if (!*name && supplied_fp)
289 for (; isSPACE(*name); name++) ;
294 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
298 SETERRNO(EINVAL,SS$_IVCHAN);
303 PerlIO *fp = IoIFP(thatio);
304 /* Flush stdio buffer before dup. --mjd
305 * Unfortunately SEEK_CURing 0 seems to
306 * be optimized away on most platforms;
307 * only Solaris and Linux seem to flush
310 /* sfio fails to clear error on next
311 sfwrite, contrary to documentation.
313 if (PerlIO_seek(fp, 0, SEEK_CUR) == -1)
316 /* On the other hand, do all platforms
317 * take gracefully to flushing a read-only
318 * filehandle? Perhaps we should do
319 * fsetpos(src)+fgetpos(dst)? --nik */
321 fd = PerlIO_fileno(fp);
322 /* When dup()ing STDIN, STDOUT or STDERR
323 * explicitly set appropriate access mode */
324 if (IoIFP(thatio) == PerlIO_stdout()
325 || IoIFP(thatio) == PerlIO_stderr())
326 IoTYPE(io) = IoTYPE_WRONLY;
327 else if (IoIFP(thatio) == PerlIO_stdin())
328 IoTYPE(io) = IoTYPE_RDONLY;
329 /* When dup()ing a socket, say result is
331 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
332 IoTYPE(io) = IoTYPE_SOCKET;
338 fd = PerlLIO_dup(fd);
341 if (!(fp = PerlIO_fdopen(fd,mode))) {
349 for (; isSPACE(*type); type++) ;
350 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
353 fp = PerlIO_stdout();
354 IoTYPE(io) = IoTYPE_STD;
357 fp = PerlIO_open((num_svs ? name : type), mode);
361 else if (*type == IoTYPE_RDONLY) {
363 for (type++; isSPACE(*type); type++) ;
374 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
378 IoTYPE(io) = IoTYPE_STD;
381 fp = PerlIO_open((num_svs ? name : type), mode);
383 else if ((num_svs && type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
384 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
386 type += 2; /* skip over '-|' */
390 while (tend > type && isSPACE(tend[-1]))
393 for (; isSPACE(*type); type++) ;
397 if (*name == '\0') { /* command is missing 19990114 */
399 if (ckWARN(WARN_PIPE))
400 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
404 if (strNE(name,"-") || num_svs)
406 TAINT_PROPER("piped open");
412 fp = PerlProc_popen(name,mode);
413 IoTYPE(io) = IoTYPE_PIPE;
419 IoTYPE(io) = IoTYPE_RDONLY;
421 for (; isSPACE(*name); name++) ;
427 if (strEQ(name,"-")) {
429 IoTYPE(io) = IoTYPE_STD;
432 fp = PerlIO_open(name,mode);
438 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == IoTYPE_RDONLY && strchr(name, '\n'))
439 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
442 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD) {
444 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
445 (void)PerlIO_close(fp);
448 if (S_ISSOCK(PL_statbuf.st_mode))
449 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
453 !(PL_statbuf.st_mode & S_IFMT)
457 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
458 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
459 ) { /* on OS's that return 0 on fstat()ed pipe */
461 Sock_size_t buflen = sizeof tmpbuf;
462 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
464 || errno != ENOTSOCK)
465 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
466 /* but some return 0 for streams too, sigh */
470 if (saveifp) { /* must use old fp? */
471 fd = PerlIO_fileno(saveifp);
473 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
474 if (saveofp != saveifp) { /* was a socket? */
475 PerlIO_close(saveofp);
480 if (fd != PerlIO_fileno(fp)) {
484 PerlLIO_dup2(PerlIO_fileno(fp), fd);
486 sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
487 (void)SvUPGRADE(sv, SVt_IV);
490 sv = *av_fetch(PL_fdpid,fd,TRUE);
492 (void)SvUPGRADE(sv, SVt_IV);
501 #if defined(HAS_FCNTL) && defined(F_SETFD)
503 int save_errno = errno;
504 fd = PerlIO_fileno(fp);
505 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
511 /* Need to supply default type info from open.pm */
512 SV *layers = PL_curcop->cop_io;
516 type = SvPV(layers,len);
517 if (type && mode[0] != 'r') {
518 /* Skip to write part */
519 char *s = strchr(type,0);
520 if (s && (s-type) < len) {
525 else if (O_BINARY != O_TEXT) {
530 while (isSPACE(*type)) type++;
532 if (PerlIO_apply_layers(aTHX_ IoIFP(io),mode,type) != 0) {
538 IoFLAGS(io) &= ~IOf_NOLINE;
541 if (IoTYPE(io) == IoTYPE_SOCKET
542 || (IoTYPE(io) == IoTYPE_WRONLY && S_ISCHR(PL_statbuf.st_mode)) )
545 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),mode))) {
551 if (PerlIO_apply_layers(aTHX_ IoOFP(io),mode,type) != 0) {
552 PerlIO_close(IoOFP(io));
568 IoTYPE(io) = savetype;
573 Perl_nextargv(pTHX_ register GV *gv)
576 #ifndef FLEXFILENAMES
585 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
586 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
587 IoFLAGS(io) &= ~IOf_START;
589 if (!PL_argvout_stack)
590 PL_argvout_stack = newAV();
591 av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
594 if (PL_filemode & (S_ISUID|S_ISGID)) {
595 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
597 (void)fchmod(PL_lastfd,PL_filemode);
599 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
603 while (av_len(GvAV(gv)) >= 0) {
606 sv = av_shift(GvAV(gv));
608 sv_setsv(GvSV(gv),sv);
609 SvSETMAGIC(GvSV(gv));
610 PL_oldname = SvPVx(GvSV(gv), oldlen);
611 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
613 TAINT_PROPER("inplace open");
614 if (oldlen == 1 && *PL_oldname == '-') {
615 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
616 return IoIFP(GvIOp(gv));
618 #ifndef FLEXFILENAMES
619 filedev = PL_statbuf.st_dev;
620 fileino = PL_statbuf.st_ino;
622 PL_filemode = PL_statbuf.st_mode;
623 fileuid = PL_statbuf.st_uid;
624 filegid = PL_statbuf.st_gid;
625 if (!S_ISREG(PL_filemode)) {
626 if (ckWARN_d(WARN_INPLACE))
627 Perl_warner(aTHX_ WARN_INPLACE,
628 "Can't do inplace edit: %s is not a regular file",
634 char *star = strchr(PL_inplace, '*');
636 char *begin = PL_inplace;
637 sv_setpvn(sv, "", 0);
639 sv_catpvn(sv, begin, star - begin);
640 sv_catpvn(sv, PL_oldname, oldlen);
642 } while ((star = strchr(begin, '*')));
647 sv_catpv(sv,PL_inplace);
649 #ifndef FLEXFILENAMES
650 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
651 && PL_statbuf.st_dev == filedev
652 && PL_statbuf.st_ino == fileino
654 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
658 if (ckWARN_d(WARN_INPLACE))
659 Perl_warner(aTHX_ WARN_INPLACE,
660 "Can't do inplace edit: %s would not be unique",
667 #if !defined(DOSISH) && !defined(__CYGWIN__)
668 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
669 if (ckWARN_d(WARN_INPLACE))
670 Perl_warner(aTHX_ WARN_INPLACE,
671 "Can't rename %s to %s: %s, skipping file",
672 PL_oldname, SvPVX(sv), Strerror(errno) );
678 (void)PerlLIO_unlink(SvPVX(sv));
679 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
680 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
683 (void)UNLINK(SvPVX(sv));
684 if (link(PL_oldname,SvPVX(sv)) < 0) {
685 if (ckWARN_d(WARN_INPLACE))
686 Perl_warner(aTHX_ WARN_INPLACE,
687 "Can't rename %s to %s: %s, skipping file",
688 PL_oldname, SvPVX(sv), Strerror(errno) );
692 (void)UNLINK(PL_oldname);
696 #if !defined(DOSISH) && !defined(AMIGAOS)
697 # ifndef VMS /* Don't delete; use automatic file versioning */
698 if (UNLINK(PL_oldname) < 0) {
699 if (ckWARN_d(WARN_INPLACE))
700 Perl_warner(aTHX_ WARN_INPLACE,
701 "Can't remove %s: %s, skipping file",
702 PL_oldname, Strerror(errno) );
708 Perl_croak(aTHX_ "Can't do inplace edit without backup");
712 sv_setpvn(sv,">",!PL_inplace);
713 sv_catpvn(sv,PL_oldname,oldlen);
714 SETERRNO(0,0); /* in case sprintf set errno */
716 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
717 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
719 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
720 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp))
723 if (ckWARN_d(WARN_INPLACE))
724 Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit on %s: %s",
725 PL_oldname, Strerror(errno) );
729 setdefout(PL_argvoutgv);
730 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
731 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
733 (void)fchmod(PL_lastfd,PL_filemode);
735 # if !(defined(WIN32) && defined(__BORLANDC__))
736 /* Borland runtime creates a readonly file! */
737 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
740 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
742 (void)fchown(PL_lastfd,fileuid,filegid);
745 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
750 return IoIFP(GvIOp(gv));
754 if (ckWARN_d(WARN_INPLACE)) {
756 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
757 && !S_ISREG(PL_statbuf.st_mode))
759 Perl_warner(aTHX_ WARN_INPLACE,
760 "Can't do inplace edit: %s is not a regular file",
764 Perl_warner(aTHX_ WARN_INPLACE, "Can't open %s: %s",
765 PL_oldname, Strerror(eno));
769 if (io && (IoFLAGS(io) & IOf_ARGV))
770 IoFLAGS(io) |= IOf_START;
772 (void)do_close(PL_argvoutgv,FALSE);
773 if (io && (IoFLAGS(io) & IOf_ARGV)
774 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
776 GV *oldout = (GV*)av_pop(PL_argvout_stack);
778 SvREFCNT_dec(oldout);
781 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
788 Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
807 if (PerlProc_pipe(fd) < 0)
809 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
810 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
811 IoIFP(wstio) = IoOFP(wstio);
812 IoTYPE(rstio) = IoTYPE_RDONLY;
813 IoTYPE(wstio) = IoTYPE_WRONLY;
814 if (!IoIFP(rstio) || !IoOFP(wstio)) {
815 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
816 else PerlLIO_close(fd[0]);
817 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
818 else PerlLIO_close(fd[1]);
822 sv_setsv(sv,&PL_sv_yes);
826 sv_setsv(sv,&PL_sv_undef);
831 /* explicit renamed to avoid C++ conflict -- kja */
833 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
840 if (!gv || SvTYPE(gv) != SVt_PVGV) {
842 SETERRNO(EBADF,SS$_IVCHAN);
846 if (!io) { /* never opened */
849 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
850 report_evil_fh(gv, io, PL_op->op_type);
851 SETERRNO(EBADF,SS$_IVCHAN);
855 retval = io_close(io, not_implicit);
859 IoLINES_LEFT(io) = IoPAGE_LEN(io);
861 IoTYPE(io) = IoTYPE_CLOSED;
866 Perl_io_close(pTHX_ IO *io, bool not_implicit)
872 if (IoTYPE(io) == IoTYPE_PIPE) {
873 status = PerlProc_pclose(IoIFP(io));
875 STATUS_NATIVE_SET(status);
876 retval = (STATUS_POSIX == 0);
879 retval = (status != -1);
882 else if (IoTYPE(io) == IoTYPE_STD)
885 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
886 retval = (PerlIO_close(IoOFP(io)) != EOF);
887 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
890 retval = (PerlIO_close(IoIFP(io)) != EOF);
892 IoOFP(io) = IoIFP(io) = Nullfp;
894 else if (not_implicit) {
895 SETERRNO(EBADF,SS$_IVCHAN);
902 Perl_do_eof(pTHX_ GV *gv)
912 else if (ckWARN(WARN_IO)
913 && (IoTYPE(io) == IoTYPE_WRONLY || IoIFP(io) == PerlIO_stdout()
914 || IoIFP(io) == PerlIO_stderr()))
916 /* integrate to report_evil_fh()? */
919 SV* sv = sv_newmortal();
920 gv_efullname4(sv, gv, Nullch, FALSE);
921 name = SvPV_nolen(sv);
924 Perl_warner(aTHX_ WARN_IO,
925 "Filehandle %s opened only for output", name);
927 Perl_warner(aTHX_ WARN_IO,
928 "Filehandle opened only for output");
933 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
934 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
935 return FALSE; /* this is the most usual case */
938 ch = PerlIO_getc(IoIFP(io));
940 (void)PerlIO_ungetc(IoIFP(io),ch);
943 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
944 if (PerlIO_get_cnt(IoIFP(io)) < -1)
945 PerlIO_set_cnt(IoIFP(io),-1);
947 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
948 if (!nextargv(PL_argvgv)) /* get another fp handy */
952 return TRUE; /* normal fp, definitely end of file */
958 Perl_do_tell(pTHX_ GV *gv)
963 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
964 #ifdef ULTRIX_STDIO_BOTCH
966 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
968 return PerlIO_tell(fp);
972 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
973 report_evil_fh(gv, io, PL_op->op_type);
975 SETERRNO(EBADF,RMS$_IFI);
980 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
985 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
986 #ifdef ULTRIX_STDIO_BOTCH
988 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
990 return PerlIO_seek(fp, pos, whence) >= 0;
994 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
995 report_evil_fh(gv, io, PL_op->op_type);
997 SETERRNO(EBADF,RMS$_IFI);
1002 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1005 register PerlIO *fp;
1007 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
1008 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1011 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1012 report_evil_fh(gv, io, PL_op->op_type);
1014 SETERRNO(EBADF,RMS$_IFI);
1019 Perl_mode_from_discipline(pTHX_ SV *discp)
1021 int mode = O_BINARY;
1024 char *s = SvPV(discp,len);
1029 if (len > 3 && strnEQ(s+1, "raw", 3)
1030 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1039 if (len > 4 && strnEQ(s+1, "crlf", 4)
1040 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1049 goto fail_discipline;
1052 else if (isSPACE(*s)) {
1059 end = strchr(s+1, ':');
1062 Perl_croak(aTHX_ "Unknown discipline '%.*s'", end-s, s);
1070 Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
1073 # if defined(atarist) || defined(__MINT__)
1074 if (!PerlIO_flush(fp)) {
1075 if (mode & O_BINARY)
1076 ((FILE*)fp)->_flag |= _IOBIN;
1078 ((FILE*)fp)->_flag &= ~ _IOBIN;
1083 if (PerlLIO_setmode(PerlIO_fileno(fp), mode) != -1) {
1084 # if defined(WIN32) && defined(__BORLANDC__)
1085 /* The translation mode of the stream is maintained independent
1086 * of the translation mode of the fd in the Borland RTL (heavy
1087 * digging through their runtime sources reveal). User has to
1088 * set the mode explicitly for the stream (though they don't
1089 * document this anywhere). GSAR 97-5-24
1091 PerlIO_seek(fp,0L,0);
1092 if (mode & O_BINARY)
1093 ((FILE*)fp)->flags |= _F_BIN;
1095 ((FILE*)fp)->flags &= ~ _F_BIN;
1103 # if defined(USEMYBINMODE)
1104 if (my_binmode(fp, iotype, mode) != FALSE)
1114 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
1115 /* code courtesy of William Kucharski */
1118 I32 my_chsize(fd, length)
1119 I32 fd; /* file descriptor */
1120 Off_t length; /* length to set file to */
1123 struct stat filebuf;
1125 if (PerlLIO_fstat(fd, &filebuf) < 0)
1128 if (filebuf.st_size < length) {
1130 /* extend file length */
1132 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1135 /* write a "0" byte */
1137 if ((PerlLIO_write(fd, "", 1)) != 1)
1141 /* truncate length */
1145 fl.l_start = length;
1146 fl.l_type = F_WRLCK; /* write lock on file space */
1149 * This relies on the UNDOCUMENTED F_FREESP argument to
1150 * fcntl(2), which truncates the file so that it ends at the
1151 * position indicated by fl.l_start.
1153 * Will minor miracles never cease?
1156 if (fcntl(fd, F_FREESP, &fl) < 0)
1163 #endif /* F_FREESP */
1166 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1168 register char *tmps;
1171 /* assuming fp is checked earlier */
1177 if (SvIOK(sv) && SvIVX(sv) != 0) {
1178 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
1179 return !PerlIO_error(fp);
1181 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
1182 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
1183 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
1184 return !PerlIO_error(fp);
1187 switch (SvTYPE(sv)) {
1191 if (ckWARN(WARN_UNINITIALIZED))
1200 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1202 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1203 return !PerlIO_error(fp);
1208 /* XXX Fix this when the I/O disciplines arrive. XXX */
1210 sv_utf8_downgrade(sv, FALSE);
1212 tmps = SvPV(sv, len);
1215 /* To detect whether the process is about to overstep its
1216 * filesize limit we would need getrlimit(). We could then
1217 * also transparently raise the limit with setrlimit() --
1218 * but only until the system hard limit/the filesystem limit,
1219 * at which we would get EPERM. Note that when using buffered
1220 * io the write failure can be delayed until the flush/close. --jhi */
1221 if (len && (PerlIO_write(fp,tmps,len) == 0))
1223 return !PerlIO_error(fp);
1233 if (PL_op->op_flags & OPf_REF) {
1238 if (io && IoIFP(io)) {
1240 sv_setpv(PL_statname,"");
1241 PL_laststype = OP_STAT;
1242 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1246 return PL_laststatval;
1247 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1248 report_evil_fh(gv, io, PL_op->op_type);
1250 sv_setpv(PL_statname,"");
1251 return (PL_laststatval = -1);
1259 if (SvTYPE(sv) == SVt_PVGV) {
1263 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1270 sv_setpv(PL_statname, s);
1271 PL_laststype = OP_STAT;
1272 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1273 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1274 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
1275 return PL_laststatval;
1285 if (PL_op->op_flags & OPf_REF) {
1287 if (cGVOP_gv == PL_defgv) {
1288 if (PL_laststype != OP_LSTAT)
1289 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
1290 return PL_laststatval;
1292 Perl_croak(aTHX_ "You can't use -l on a filehandle");
1295 PL_laststype = OP_LSTAT;
1299 sv_setpv(PL_statname,SvPV(sv, n_a));
1300 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
1301 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
1302 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
1303 return PL_laststatval;
1307 Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1309 return do_aexec5(really, mark, sp, 0, 0);
1313 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1314 int fd, int do_report)
1316 #ifdef MACOS_TRADITIONAL
1317 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1325 New(401,PL_Argv, sp - mark + 1, char*);
1327 while (++mark <= sp) {
1329 *a++ = SvPVx(*mark, n_a);
1334 if (*PL_Argv[0] != '/') /* will execvp use PATH? */
1335 TAINT_ENV(); /* testing IFS here is overkill, probably */
1336 if (really && *(tmps = SvPV(really, n_a)))
1337 PerlProc_execvp(tmps,PL_Argv);
1339 PerlProc_execvp(PL_Argv[0],PL_Argv);
1340 if (ckWARN(WARN_EXEC))
1341 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1342 PL_Argv[0], Strerror(errno));
1346 PerlLIO_write(fd, (void*)&e, sizeof(int));
1356 Perl_do_execfree(pTHX)
1360 PL_Argv = Null(char **);
1368 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
1371 Perl_do_exec(pTHX_ char *cmd)
1373 return do_exec3(cmd,0,0);
1377 Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1383 while (*cmd && isSPACE(*cmd))
1386 /* save an extra exec if possible */
1389 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1391 s = cmd+PL_cshlen+3;
1405 if (s[-1] == '\'') {
1407 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1415 /* see if there are shell metacharacters in it */
1417 if (*cmd == '.' && isSPACE(cmd[1]))
1420 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1423 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
1427 for (s = cmd; *s; s++) {
1428 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1429 if (*s == '\n' && !s[1]) {
1433 /* handle the 2>&1 construct at the end */
1434 if (*s == '>' && s[1] == '&' && s[2] == '1'
1435 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1436 && (!s[3] || isSPACE(s[3])))
1440 while (*t && isSPACE(*t))
1442 if (!*t && (dup2(1,2) != -1)) {
1448 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1453 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1454 PL_Cmd = savepvn(cmd, s-cmd);
1456 for (s = PL_Cmd; *s;) {
1457 while (*s && isSPACE(*s)) s++;
1460 while (*s && !isSPACE(*s)) s++;
1466 PerlProc_execvp(PL_Argv[0],PL_Argv);
1467 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1475 if (ckWARN(WARN_EXEC))
1476 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1477 PL_Argv[0], Strerror(errno));
1479 PerlLIO_write(fd, (void*)&e, sizeof(int));
1488 #endif /* OS2 || WIN32 */
1491 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1496 register I32 tot = 0;
1499 SV **oldmark = mark;
1502 #define APPLY_TAINT_PROPER() \
1504 if (PL_tainted) { TAINT_PROPER(what); } \
1507 /* This is a first heuristic; it doesn't catch tainting magic. */
1509 while (++mark <= sp) {
1510 if (SvTAINTED(*mark)) {
1520 APPLY_TAINT_PROPER();
1523 APPLY_TAINT_PROPER();
1525 while (++mark <= sp) {
1526 char *name = SvPVx(*mark, n_a);
1527 APPLY_TAINT_PROPER();
1528 if (PerlLIO_chmod(name, val))
1536 APPLY_TAINT_PROPER();
1537 if (sp - mark > 2) {
1538 val = SvIVx(*++mark);
1539 val2 = SvIVx(*++mark);
1540 APPLY_TAINT_PROPER();
1542 while (++mark <= sp) {
1543 char *name = SvPVx(*mark, n_a);
1544 APPLY_TAINT_PROPER();
1545 if (PerlLIO_chown(name, val, val2))
1552 XXX Should we make lchown() directly available from perl?
1553 For now, we'll let Configure test for HAS_LCHOWN, but do
1554 nothing in the core.
1560 APPLY_TAINT_PROPER();
1563 s = SvPVx(*++mark, n_a);
1565 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1567 if (!(val = whichsig(s)))
1568 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1572 APPLY_TAINT_PROPER();
1575 /* kill() doesn't do process groups (job trees?) under VMS */
1576 if (val < 0) val = -val;
1577 if (val == SIGKILL) {
1578 # include <starlet.h>
1579 /* Use native sys$delprc() to insure that target process is
1580 * deleted; supervisor-mode images don't pay attention to
1581 * CRTL's emulation of Unix-style signals and kill()
1583 while (++mark <= sp) {
1584 I32 proc = SvIVx(*mark);
1585 register unsigned long int __vmssts;
1586 APPLY_TAINT_PROPER();
1587 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1591 case SS$_NOSUCHNODE:
1592 SETERRNO(ESRCH,__vmssts);
1595 SETERRNO(EPERM,__vmssts);
1598 SETERRNO(EVMSERR,__vmssts);
1607 while (++mark <= sp) {
1608 I32 proc = SvIVx(*mark);
1609 APPLY_TAINT_PROPER();
1611 if (PerlProc_killpg(proc,val)) /* BSD */
1613 if (PerlProc_kill(-proc,val)) /* SYSV */
1619 while (++mark <= sp) {
1620 I32 proc = SvIVx(*mark);
1621 APPLY_TAINT_PROPER();
1622 if (PerlProc_kill(proc, val))
1630 APPLY_TAINT_PROPER();
1632 while (++mark <= sp) {
1633 s = SvPVx(*mark, n_a);
1634 APPLY_TAINT_PROPER();
1635 if (PL_euid || PL_unsafe) {
1639 else { /* don't let root wipe out directories without -U */
1640 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1652 APPLY_TAINT_PROPER();
1653 if (sp - mark > 2) {
1654 #if defined(I_UTIME) || defined(VMS)
1655 struct utimbuf utbuf;
1663 Zero(&utbuf, sizeof utbuf, char);
1665 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1666 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1668 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1669 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
1671 APPLY_TAINT_PROPER();
1673 while (++mark <= sp) {
1674 char *name = SvPVx(*mark, n_a);
1675 APPLY_TAINT_PROPER();
1676 if (PerlLIO_utime(name, &utbuf))
1687 #undef APPLY_TAINT_PROPER
1690 /* Do the permissions allow some operation? Assumes statcache already set. */
1691 #ifndef VMS /* VMS' cando is in vms.c */
1693 Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register Stat_t *statbufp)
1694 /* Note: we use `effective' both for uids and gids.
1695 * Here we are betting on Uid_t being equal or wider than Gid_t. */
1698 /* [Comments and code from Len Reed]
1699 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1700 * to write-protected files. The execute permission bit is set
1701 * by the Miscrosoft C library stat() function for the following:
1706 * All files and directories are readable.
1707 * Directories and special files, e.g. "CON", cannot be
1709 * [Comment by Tom Dinger -- a directory can have the write-protect
1710 * bit set in the file system, but DOS permits changes to
1711 * the directory anyway. In addition, all bets are off
1712 * here for networked software, such as Novell and
1716 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1717 * too so it will actually look into the files for magic numbers
1719 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1721 #else /* ! DOSISH */
1722 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1723 if (mode == S_IXUSR) {
1724 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1728 return TRUE; /* root reads and writes anything */
1731 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1732 if (statbufp->st_mode & mode)
1733 return TRUE; /* ok as "user" */
1735 else if (ingroup(statbufp->st_gid,effective)) {
1736 if (statbufp->st_mode & mode >> 3)
1737 return TRUE; /* ok as "group" */
1739 else if (statbufp->st_mode & mode >> 6)
1740 return TRUE; /* ok as "other" */
1742 #endif /* ! DOSISH */
1747 Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
1749 #ifdef MACOS_TRADITIONAL
1750 /* This is simply not correct for AppleShare, but fix it yerself. */
1753 if (testgid == (effective ? PL_egid : PL_gid))
1755 #ifdef HAS_GETGROUPS
1760 Groups_t gary[NGROUPS];
1763 anum = getgroups(NGROUPS,gary);
1765 if (gary[anum] == testgid)
1773 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1776 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1782 key = (key_t)SvNVx(*++mark);
1783 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1784 flags = SvIVx(*++mark);
1790 return msgget(key, flags);
1794 return semget(key, n, flags);
1798 return shmget(key, n, flags);
1800 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1802 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1805 return -1; /* should never happen */
1809 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
1814 I32 id, n, cmd, infosize, getinfo;
1817 id = SvIVx(*++mark);
1818 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1819 cmd = SvIVx(*++mark);
1822 getinfo = (cmd == IPC_STAT);
1828 if (cmd == IPC_STAT || cmd == IPC_SET)
1829 infosize = sizeof(struct msqid_ds);
1834 if (cmd == IPC_STAT || cmd == IPC_SET)
1835 infosize = sizeof(struct shmid_ds);
1841 if (cmd == IPC_STAT || cmd == IPC_SET)
1842 infosize = sizeof(struct semid_ds);
1843 else if (cmd == GETALL || cmd == SETALL)
1845 struct semid_ds semds;
1847 #ifdef EXTRA_F_IN_SEMUN_BUF
1848 semun.buff = &semds;
1852 getinfo = (cmd == GETALL);
1853 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1855 infosize = semds.sem_nsems * sizeof(short);
1856 /* "short" is technically wrong but much more portable
1857 than guessing about u_?short(_t)? */
1860 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1864 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1866 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1875 SvPV_force(astr, len);
1876 a = SvGROW(astr, infosize+1);
1880 a = SvPV(astr, len);
1881 if (len != infosize)
1882 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
1891 a = INT2PTR(char *,i); /* ouch */
1898 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1904 union semun unsemds;
1906 #ifdef EXTRA_F_IN_SEMUN_BUF
1907 unsemds.buff = (struct semid_ds *)a;
1909 unsemds.buf = (struct semid_ds *)a;
1911 ret = Semctl(id, n, cmd, unsemds);
1913 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1920 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1924 if (getinfo && ret >= 0) {
1925 SvCUR_set(astr, infosize);
1926 *SvEND(astr) = '\0';
1933 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
1939 I32 id, msize, flags;
1942 id = SvIVx(*++mark);
1944 flags = SvIVx(*++mark);
1945 mbuf = SvPV(mstr, len);
1946 if ((msize = len - sizeof(long)) < 0)
1947 Perl_croak(aTHX_ "Arg too short for msgsnd");
1949 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1951 Perl_croak(aTHX_ "msgsnd not implemented");
1956 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
1963 I32 id, msize, flags, ret;
1966 id = SvIVx(*++mark);
1968 /* suppress warning when reading into undef var --jhi */
1970 sv_setpvn(mstr, "", 0);
1971 msize = SvIVx(*++mark);
1972 mtype = (long)SvIVx(*++mark);
1973 flags = SvIVx(*++mark);
1974 SvPV_force(mstr, len);
1975 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1978 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1980 SvCUR_set(mstr, sizeof(long)+ret);
1981 *SvEND(mstr) = '\0';
1982 #ifndef INCOMPLETE_TAINTS
1983 /* who knows who has been playing with this message? */
1989 Perl_croak(aTHX_ "msgrcv not implemented");
1994 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2003 id = SvIVx(*++mark);
2005 opbuf = SvPV(opstr, opsize);
2006 if (opsize < sizeof(struct sembuf)
2007 || (opsize % sizeof(struct sembuf)) != 0) {
2008 SETERRNO(EINVAL,LIB$_INVARG);
2012 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
2014 Perl_croak(aTHX_ "semop not implemented");
2019 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2025 I32 id, mpos, msize;
2027 struct shmid_ds shmds;
2029 id = SvIVx(*++mark);
2031 mpos = SvIVx(*++mark);
2032 msize = SvIVx(*++mark);
2034 if (shmctl(id, IPC_STAT, &shmds) == -1)
2036 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
2037 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
2040 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2041 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2043 if (optype == OP_SHMREAD) {
2044 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2046 sv_setpvn(mstr, "", 0);
2047 SvPV_force(mstr, len);
2048 mbuf = SvGROW(mstr, msize+1);
2050 Copy(shm + mpos, mbuf, msize, char);
2051 SvCUR_set(mstr, msize);
2052 *SvEND(mstr) = '\0';
2054 #ifndef INCOMPLETE_TAINTS
2055 /* who knows who has been playing with this shared memory? */
2062 mbuf = SvPV(mstr, len);
2063 if ((n = len) > msize)
2065 Copy(mbuf, shm + mpos, n, char);
2067 memzero(shm + mpos + n, msize - n);
2071 Perl_croak(aTHX_ "shm I/O not implemented");
2075 #endif /* SYSV IPC */