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)
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_open9(gv, name, len, as_raw, rawmode, rawperm,
59 supplied_fp, Nullsv, 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 register IO *io = GvIOn(gv);
68 PerlIO *saveifp = Nullfp;
69 PerlIO *saveofp = Nullfp;
70 char savetype = IoTYPE_CLOSED;
75 bool was_fdopen = FALSE;
76 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
79 char mode[4]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */
81 Zero(mode,sizeof(mode),char);
82 PL_forkprocess = 1; /* assume true if no fork */
84 /* Collect default raw/crlf info from the op */
85 if (PL_op && PL_op->op_type == OP_OPEN) {
86 /* set up disciplines */
87 U8 flags = PL_op->op_private;
88 in_raw = (flags & OPpOPEN_IN_RAW);
89 in_crlf = (flags & OPpOPEN_IN_CRLF);
90 out_raw = (flags & OPpOPEN_OUT_RAW);
91 out_crlf = (flags & OPpOPEN_OUT_CRLF);
94 /* If currently open - close before we re-open */
96 fd = PerlIO_fileno(IoIFP(io));
97 if (IoTYPE(io) == IoTYPE_STD)
99 else if (fd <= PL_maxsysfd) {
102 savetype = IoTYPE(io);
105 else if (IoTYPE(io) == IoTYPE_PIPE)
106 result = PerlProc_pclose(IoIFP(io));
107 else if (IoIFP(io) != IoOFP(io)) {
109 result = PerlIO_close(IoOFP(io));
110 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
113 result = PerlIO_close(IoIFP(io));
116 result = PerlIO_close(IoIFP(io));
117 if (result == EOF && fd > PL_maxsysfd)
118 PerlIO_printf(Perl_error_log,
119 "Warning: unable to close filehandle %s properly.\n",
121 IoOFP(io) = IoIFP(io) = Nullfp;
125 /* sysopen style args, i.e. integer mode and permissions */
127 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
128 rawmode |= O_LARGEFILE;
132 #define O_ACCMODE 3 /* Assume traditional implementation */
135 switch (result = rawmode & O_ACCMODE) {
137 IoTYPE(io) = IoTYPE_RDONLY;
140 IoTYPE(io) = IoTYPE_WRONLY;
144 IoTYPE(io) = IoTYPE_RDWR;
148 writing = (result > 0);
149 fd = PerlLIO_open3(name, rawmode, rawperm);
155 if (result == O_RDONLY) {
159 else if (rawmode & O_APPEND) {
161 if (result != O_WRONLY)
166 if (result == O_WRONLY)
173 if (rawmode & O_BINARY)
176 fp = PerlIO_fdopen(fd, mode);
182 /* Regular (non-sys) open */
188 type = savepvn(name, len);
191 /* Loose trailing white space */
192 while (tend > type && isSPACE(tend[-1]))
195 /* New style explict name, type is just mode and discipline/layer info */
197 name = SvPV(svs, l) ;
199 name = savepvn(name, len);
202 for (; isSPACE(*type); type++) ;
209 if (*type == IoTYPE_RDWR && (!num_svs || tend > type+1 && tend[-1] != IoTYPE_PIPE)) { /* scary */
214 if (*type == IoTYPE_PIPE) {
216 if (type[1] != IoTYPE_STD) {
218 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
223 for (type++; isSPACE(*type); type++) ;
228 if (*name == '\0') { /* command is missing 19990114 */
230 if (ckWARN(WARN_PIPE))
231 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
235 if (strNE(name,"-") || num_svs)
237 TAINT_PROPER("piped open");
238 if (!num_svs && name[len-1] == '|') {
241 if (ckWARN(WARN_PIPE))
242 Perl_warner(aTHX_ WARN_PIPE, "Can't open bidirectional pipe");
250 fp = PerlProc_popen(name,mode);
252 else if (*type == IoTYPE_WRONLY) {
253 TAINT_PROPER("open");
255 if (*type == IoTYPE_WRONLY) {
256 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
257 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
280 if (!*name && supplied_fp)
284 for (; isSPACE(*name); name++) ;
289 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
293 SETERRNO(EINVAL,SS$_IVCHAN);
298 PerlIO *fp = IoIFP(thatio);
299 /* Flush stdio buffer before dup. --mjd
300 * Unfortunately SEEK_CURing 0 seems to
301 * be optimized away on most platforms;
302 * only Solaris and Linux seem to flush
305 /* sfio fails to clear error on next
306 sfwrite, contrary to documentation.
308 if (PerlIO_seek(fp, 0, SEEK_CUR) == -1)
311 /* On the other hand, do all platforms
312 * take gracefully to flushing a read-only
313 * filehandle? Perhaps we should do
314 * fsetpos(src)+fgetpos(dst)? --nik */
316 fd = PerlIO_fileno(fp);
317 /* When dup()ing STDIN, STDOUT or STDERR
318 * explicitly set appropriate access mode */
319 if (IoIFP(thatio) == PerlIO_stdout()
320 || IoIFP(thatio) == PerlIO_stderr())
321 IoTYPE(io) = IoTYPE_WRONLY;
322 else if (IoIFP(thatio) == PerlIO_stdin())
323 IoTYPE(io) = IoTYPE_RDONLY;
324 /* When dup()ing a socket, say result is
326 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
327 IoTYPE(io) = IoTYPE_SOCKET;
333 fd = PerlLIO_dup(fd);
336 if (!(fp = PerlIO_fdopen(fd,mode))) {
344 for (; isSPACE(*type); type++) ;
345 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
348 fp = PerlIO_stdout();
349 IoTYPE(io) = IoTYPE_STD;
352 fp = PerlIO_open((num_svs ? name : type), mode);
356 else if (*type == IoTYPE_RDONLY) {
358 for (type++; isSPACE(*type); type++) ;
369 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
373 IoTYPE(io) = IoTYPE_STD;
376 fp = PerlIO_open((num_svs ? name : type), mode);
378 else if ((num_svs && type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
379 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
381 type += 2; /* skip over '-|' */
385 while (tend > type && isSPACE(tend[-1]))
388 for (; isSPACE(*type); type++) ;
392 if (*name == '\0') { /* command is missing 19990114 */
394 if (ckWARN(WARN_PIPE))
395 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
399 if (strNE(name,"-") || num_svs)
401 TAINT_PROPER("piped open");
407 fp = PerlProc_popen(name,mode);
408 IoTYPE(io) = IoTYPE_PIPE;
414 IoTYPE(io) = IoTYPE_RDONLY;
416 for (; isSPACE(*name); name++) ;
422 if (strEQ(name,"-")) {
424 IoTYPE(io) = IoTYPE_STD;
427 fp = PerlIO_open(name,mode);
433 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == IoTYPE_RDONLY && strchr(name, '\n'))
434 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
437 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD) {
439 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
440 (void)PerlIO_close(fp);
443 if (S_ISSOCK(PL_statbuf.st_mode))
444 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
448 !(PL_statbuf.st_mode & S_IFMT)
452 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
453 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
454 ) { /* on OS's that return 0 on fstat()ed pipe */
456 Sock_size_t buflen = sizeof tmpbuf;
457 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
459 || errno != ENOTSOCK)
460 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
461 /* but some return 0 for streams too, sigh */
465 if (saveifp) { /* must use old fp? */
466 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
467 then dup the new fileno down
469 fd = PerlIO_fileno(saveifp);
471 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
472 if (saveofp != saveifp) { /* was a socket? */
473 PerlIO_close(saveofp);
474 /* This looks very suspect - NI-S 24 Nov 2000 */
476 Safefree(saveofp); /* ??? */
479 if (fd != PerlIO_fileno(fp)) {
483 PerlLIO_dup2(PerlIO_fileno(fp), fd);
485 sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
486 (void)SvUPGRADE(sv, SVt_IV);
489 sv = *av_fetch(PL_fdpid,fd,TRUE);
491 (void)SvUPGRADE(sv, SVt_IV);
500 #if defined(HAS_FCNTL) && defined(F_SETFD)
502 int save_errno = errno;
503 fd = PerlIO_fileno(fp);
504 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
510 /* Need to supply default type info from open.pm */
511 SV *layers = PL_curcop->cop_io;
515 type = SvPV(layers,len);
516 if (type && mode[0] != 'r') {
517 /* Skip to write part */
518 char *s = strchr(type,0);
519 if (s && (s-type) < len) {
526 while (isSPACE(*type)) type++;
528 if (PerlIO_apply_layers(aTHX_ IoIFP(io),mode,type) != 0) {
534 IoFLAGS(io) &= ~IOf_NOLINE;
537 if (IoTYPE(io) == IoTYPE_SOCKET
538 || (IoTYPE(io) == IoTYPE_WRONLY && S_ISCHR(PL_statbuf.st_mode)) )
541 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),mode))) {
547 if (PerlIO_apply_layers(aTHX_ IoOFP(io),mode,type) != 0) {
548 PerlIO_close(IoOFP(io));
564 IoTYPE(io) = savetype;
569 Perl_nextargv(pTHX_ register GV *gv)
572 #ifndef FLEXFILENAMES
581 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
582 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
583 IoFLAGS(io) &= ~IOf_START;
585 if (!PL_argvout_stack)
586 PL_argvout_stack = newAV();
587 av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
590 if (PL_filemode & (S_ISUID|S_ISGID)) {
591 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
593 (void)fchmod(PL_lastfd,PL_filemode);
595 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
599 while (av_len(GvAV(gv)) >= 0) {
602 sv = av_shift(GvAV(gv));
604 sv_setsv(GvSV(gv),sv);
605 SvSETMAGIC(GvSV(gv));
606 PL_oldname = SvPVx(GvSV(gv), oldlen);
607 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
609 TAINT_PROPER("inplace open");
610 if (oldlen == 1 && *PL_oldname == '-') {
611 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
612 return IoIFP(GvIOp(gv));
614 #ifndef FLEXFILENAMES
615 filedev = PL_statbuf.st_dev;
616 fileino = PL_statbuf.st_ino;
618 PL_filemode = PL_statbuf.st_mode;
619 fileuid = PL_statbuf.st_uid;
620 filegid = PL_statbuf.st_gid;
621 if (!S_ISREG(PL_filemode)) {
622 if (ckWARN_d(WARN_INPLACE))
623 Perl_warner(aTHX_ WARN_INPLACE,
624 "Can't do inplace edit: %s is not a regular file",
630 char *star = strchr(PL_inplace, '*');
632 char *begin = PL_inplace;
633 sv_setpvn(sv, "", 0);
635 sv_catpvn(sv, begin, star - begin);
636 sv_catpvn(sv, PL_oldname, oldlen);
638 } while ((star = strchr(begin, '*')));
643 sv_catpv(sv,PL_inplace);
645 #ifndef FLEXFILENAMES
646 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
647 && PL_statbuf.st_dev == filedev
648 && PL_statbuf.st_ino == fileino
650 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
654 if (ckWARN_d(WARN_INPLACE))
655 Perl_warner(aTHX_ WARN_INPLACE,
656 "Can't do inplace edit: %s would not be unique",
663 #if !defined(DOSISH) && !defined(__CYGWIN__)
664 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
665 if (ckWARN_d(WARN_INPLACE))
666 Perl_warner(aTHX_ WARN_INPLACE,
667 "Can't rename %s to %s: %s, skipping file",
668 PL_oldname, SvPVX(sv), Strerror(errno) );
674 (void)PerlLIO_unlink(SvPVX(sv));
675 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
676 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
679 (void)UNLINK(SvPVX(sv));
680 if (link(PL_oldname,SvPVX(sv)) < 0) {
681 if (ckWARN_d(WARN_INPLACE))
682 Perl_warner(aTHX_ WARN_INPLACE,
683 "Can't rename %s to %s: %s, skipping file",
684 PL_oldname, SvPVX(sv), Strerror(errno) );
688 (void)UNLINK(PL_oldname);
692 #if !defined(DOSISH) && !defined(AMIGAOS)
693 # ifndef VMS /* Don't delete; use automatic file versioning */
694 if (UNLINK(PL_oldname) < 0) {
695 if (ckWARN_d(WARN_INPLACE))
696 Perl_warner(aTHX_ WARN_INPLACE,
697 "Can't remove %s: %s, skipping file",
698 PL_oldname, Strerror(errno) );
704 Perl_croak(aTHX_ "Can't do inplace edit without backup");
708 sv_setpvn(sv,">",!PL_inplace);
709 sv_catpvn(sv,PL_oldname,oldlen);
710 SETERRNO(0,0); /* in case sprintf set errno */
712 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
713 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
715 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
716 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp))
719 if (ckWARN_d(WARN_INPLACE))
720 Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit on %s: %s",
721 PL_oldname, Strerror(errno) );
725 setdefout(PL_argvoutgv);
726 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
727 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
729 (void)fchmod(PL_lastfd,PL_filemode);
731 # if !(defined(WIN32) && defined(__BORLANDC__))
732 /* Borland runtime creates a readonly file! */
733 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
736 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
738 (void)fchown(PL_lastfd,fileuid,filegid);
741 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
746 return IoIFP(GvIOp(gv));
750 if (ckWARN_d(WARN_INPLACE)) {
752 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
753 && !S_ISREG(PL_statbuf.st_mode))
755 Perl_warner(aTHX_ WARN_INPLACE,
756 "Can't do inplace edit: %s is not a regular file",
760 Perl_warner(aTHX_ WARN_INPLACE, "Can't open %s: %s",
761 PL_oldname, Strerror(eno));
765 if (io && (IoFLAGS(io) & IOf_ARGV))
766 IoFLAGS(io) |= IOf_START;
768 (void)do_close(PL_argvoutgv,FALSE);
769 if (io && (IoFLAGS(io) & IOf_ARGV)
770 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
772 GV *oldout = (GV*)av_pop(PL_argvout_stack);
774 SvREFCNT_dec(oldout);
777 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
784 Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
803 if (PerlProc_pipe(fd) < 0)
805 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
806 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
807 IoIFP(wstio) = IoOFP(wstio);
808 IoTYPE(rstio) = IoTYPE_RDONLY;
809 IoTYPE(wstio) = IoTYPE_WRONLY;
810 if (!IoIFP(rstio) || !IoOFP(wstio)) {
811 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
812 else PerlLIO_close(fd[0]);
813 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
814 else PerlLIO_close(fd[1]);
818 sv_setsv(sv,&PL_sv_yes);
822 sv_setsv(sv,&PL_sv_undef);
827 /* explicit renamed to avoid C++ conflict -- kja */
829 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
836 if (!gv || SvTYPE(gv) != SVt_PVGV) {
838 SETERRNO(EBADF,SS$_IVCHAN);
842 if (!io) { /* never opened */
845 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
846 report_evil_fh(gv, io, PL_op->op_type);
847 SETERRNO(EBADF,SS$_IVCHAN);
851 retval = io_close(io, not_implicit);
855 IoLINES_LEFT(io) = IoPAGE_LEN(io);
857 IoTYPE(io) = IoTYPE_CLOSED;
862 Perl_io_close(pTHX_ IO *io, bool not_implicit)
868 if (IoTYPE(io) == IoTYPE_PIPE) {
869 status = PerlProc_pclose(IoIFP(io));
871 STATUS_NATIVE_SET(status);
872 retval = (STATUS_POSIX == 0);
875 retval = (status != -1);
878 else if (IoTYPE(io) == IoTYPE_STD)
881 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
882 retval = (PerlIO_close(IoOFP(io)) != EOF);
883 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
886 retval = (PerlIO_close(IoIFP(io)) != EOF);
888 IoOFP(io) = IoIFP(io) = Nullfp;
890 else if (not_implicit) {
891 SETERRNO(EBADF,SS$_IVCHAN);
898 Perl_do_eof(pTHX_ GV *gv)
908 else if (ckWARN(WARN_IO)
909 && (IoTYPE(io) == IoTYPE_WRONLY || IoIFP(io) == PerlIO_stdout()
910 || IoIFP(io) == PerlIO_stderr()))
912 /* integrate to report_evil_fh()? */
915 SV* sv = sv_newmortal();
916 gv_efullname4(sv, gv, Nullch, FALSE);
917 name = SvPV_nolen(sv);
920 Perl_warner(aTHX_ WARN_IO,
921 "Filehandle %s opened only for output", name);
923 Perl_warner(aTHX_ WARN_IO,
924 "Filehandle opened only for output");
929 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
930 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
931 return FALSE; /* this is the most usual case */
934 ch = PerlIO_getc(IoIFP(io));
936 (void)PerlIO_ungetc(IoIFP(io),ch);
940 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
941 if (PerlIO_get_cnt(IoIFP(io)) < -1)
942 PerlIO_set_cnt(IoIFP(io),-1);
944 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
945 if (!nextargv(PL_argvgv)) /* get another fp handy */
949 return TRUE; /* normal fp, definitely end of file */
955 Perl_do_tell(pTHX_ GV *gv)
960 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
961 #ifdef ULTRIX_STDIO_BOTCH
963 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
965 return PerlIO_tell(fp);
969 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
970 report_evil_fh(gv, io, PL_op->op_type);
972 SETERRNO(EBADF,RMS$_IFI);
977 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
982 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
983 #ifdef ULTRIX_STDIO_BOTCH
985 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
987 return PerlIO_seek(fp, pos, whence) >= 0;
991 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
992 report_evil_fh(gv, io, PL_op->op_type);
994 SETERRNO(EBADF,RMS$_IFI);
999 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1002 register PerlIO *fp;
1004 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
1005 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1008 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1009 report_evil_fh(gv, io, PL_op->op_type);
1011 SETERRNO(EBADF,RMS$_IFI);
1016 Perl_mode_from_discipline(pTHX_ SV *discp)
1018 int mode = O_BINARY;
1021 char *s = SvPV(discp,len);
1026 if (len > 3 && strnEQ(s+1, "raw", 3)
1027 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1036 if (len > 4 && strnEQ(s+1, "crlf", 4)
1037 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1046 goto fail_discipline;
1049 else if (isSPACE(*s)) {
1056 end = strchr(s+1, ':');
1059 #ifndef PERLIO_LAYERS
1060 Perl_croak(aTHX_ "Unknown discipline '%.*s'", end-s, s);
1071 Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
1073 /* The old body of this is now in non-LAYER part of perlio.c
1074 * This is a stub for any XS code which might have been calling it.
1076 char *name = (O_BINARY != O_TEXT && !(mode & O_BINARY)) ? ":crlf" : ":raw";
1077 return PerlIO_binmode(aTHX_ fp, iotype, mode, name);
1080 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
1081 /* code courtesy of William Kucharski */
1084 I32 my_chsize(fd, length)
1085 I32 fd; /* file descriptor */
1086 Off_t length; /* length to set file to */
1089 struct stat filebuf;
1091 if (PerlLIO_fstat(fd, &filebuf) < 0)
1094 if (filebuf.st_size < length) {
1096 /* extend file length */
1098 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1101 /* write a "0" byte */
1103 if ((PerlLIO_write(fd, "", 1)) != 1)
1107 /* truncate length */
1111 fl.l_start = length;
1112 fl.l_type = F_WRLCK; /* write lock on file space */
1115 * This relies on the UNDOCUMENTED F_FREESP argument to
1116 * fcntl(2), which truncates the file so that it ends at the
1117 * position indicated by fl.l_start.
1119 * Will minor miracles never cease?
1122 if (fcntl(fd, F_FREESP, &fl) < 0)
1129 #endif /* F_FREESP */
1132 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1134 register char *tmps;
1137 /* assuming fp is checked earlier */
1143 if (SvIOK(sv) && SvIVX(sv) != 0) {
1144 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
1145 return !PerlIO_error(fp);
1147 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
1148 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
1149 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
1150 return !PerlIO_error(fp);
1153 switch (SvTYPE(sv)) {
1157 if (ckWARN(WARN_UNINITIALIZED))
1166 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1168 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1169 return !PerlIO_error(fp);
1174 /* XXX Fix this when the I/O disciplines arrive. XXX */
1176 sv_utf8_downgrade(sv, FALSE);
1178 tmps = SvPV(sv, len);
1181 /* To detect whether the process is about to overstep its
1182 * filesize limit we would need getrlimit(). We could then
1183 * also transparently raise the limit with setrlimit() --
1184 * but only until the system hard limit/the filesystem limit,
1185 * at which we would get EPERM. Note that when using buffered
1186 * io the write failure can be delayed until the flush/close. --jhi */
1187 if (len && (PerlIO_write(fp,tmps,len) == 0))
1189 return !PerlIO_error(fp);
1199 if (PL_op->op_flags & OPf_REF) {
1204 if (io && IoIFP(io)) {
1206 sv_setpv(PL_statname,"");
1207 PL_laststype = OP_STAT;
1208 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1212 return PL_laststatval;
1213 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1214 report_evil_fh(gv, io, PL_op->op_type);
1216 sv_setpv(PL_statname,"");
1217 return (PL_laststatval = -1);
1225 if (SvTYPE(sv) == SVt_PVGV) {
1229 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1236 sv_setpv(PL_statname, s);
1237 PL_laststype = OP_STAT;
1238 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1239 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1240 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
1241 return PL_laststatval;
1251 if (PL_op->op_flags & OPf_REF) {
1253 if (cGVOP_gv == PL_defgv) {
1254 if (PL_laststype != OP_LSTAT)
1255 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
1256 return PL_laststatval;
1258 Perl_croak(aTHX_ "You can't use -l on a filehandle");
1261 PL_laststype = OP_LSTAT;
1265 sv_setpv(PL_statname,SvPV(sv, n_a));
1266 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
1267 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
1268 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
1269 return PL_laststatval;
1273 Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1275 return do_aexec5(really, mark, sp, 0, 0);
1279 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1280 int fd, int do_report)
1282 #ifdef MACOS_TRADITIONAL
1283 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1291 New(401,PL_Argv, sp - mark + 1, char*);
1293 while (++mark <= sp) {
1295 *a++ = SvPVx(*mark, n_a);
1300 if (*PL_Argv[0] != '/') /* will execvp use PATH? */
1301 TAINT_ENV(); /* testing IFS here is overkill, probably */
1302 if (really && *(tmps = SvPV(really, n_a)))
1303 PerlProc_execvp(tmps,PL_Argv);
1305 PerlProc_execvp(PL_Argv[0],PL_Argv);
1306 if (ckWARN(WARN_EXEC))
1307 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1308 PL_Argv[0], Strerror(errno));
1312 PerlLIO_write(fd, (void*)&e, sizeof(int));
1322 Perl_do_execfree(pTHX)
1326 PL_Argv = Null(char **);
1334 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
1337 Perl_do_exec(pTHX_ char *cmd)
1339 return do_exec3(cmd,0,0);
1343 Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1349 while (*cmd && isSPACE(*cmd))
1352 /* save an extra exec if possible */
1355 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1357 s = cmd+PL_cshlen+3;
1371 if (s[-1] == '\'') {
1373 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1381 /* see if there are shell metacharacters in it */
1383 if (*cmd == '.' && isSPACE(cmd[1]))
1386 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1389 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
1393 for (s = cmd; *s; s++) {
1394 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1395 if (*s == '\n' && !s[1]) {
1399 /* handle the 2>&1 construct at the end */
1400 if (*s == '>' && s[1] == '&' && s[2] == '1'
1401 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1402 && (!s[3] || isSPACE(s[3])))
1406 while (*t && isSPACE(*t))
1408 if (!*t && (dup2(1,2) != -1)) {
1414 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1419 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1420 PL_Cmd = savepvn(cmd, s-cmd);
1422 for (s = PL_Cmd; *s;) {
1423 while (*s && isSPACE(*s)) s++;
1426 while (*s && !isSPACE(*s)) s++;
1432 PerlProc_execvp(PL_Argv[0],PL_Argv);
1433 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1441 if (ckWARN(WARN_EXEC))
1442 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1443 PL_Argv[0], Strerror(errno));
1445 PerlLIO_write(fd, (void*)&e, sizeof(int));
1454 #endif /* OS2 || WIN32 */
1457 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1462 register I32 tot = 0;
1465 SV **oldmark = mark;
1468 #define APPLY_TAINT_PROPER() \
1470 if (PL_tainted) { TAINT_PROPER(what); } \
1473 /* This is a first heuristic; it doesn't catch tainting magic. */
1475 while (++mark <= sp) {
1476 if (SvTAINTED(*mark)) {
1486 APPLY_TAINT_PROPER();
1489 APPLY_TAINT_PROPER();
1491 while (++mark <= sp) {
1492 char *name = SvPVx(*mark, n_a);
1493 APPLY_TAINT_PROPER();
1494 if (PerlLIO_chmod(name, val))
1502 APPLY_TAINT_PROPER();
1503 if (sp - mark > 2) {
1504 val = SvIVx(*++mark);
1505 val2 = SvIVx(*++mark);
1506 APPLY_TAINT_PROPER();
1508 while (++mark <= sp) {
1509 char *name = SvPVx(*mark, n_a);
1510 APPLY_TAINT_PROPER();
1511 if (PerlLIO_chown(name, val, val2))
1518 XXX Should we make lchown() directly available from perl?
1519 For now, we'll let Configure test for HAS_LCHOWN, but do
1520 nothing in the core.
1526 APPLY_TAINT_PROPER();
1529 s = SvPVx(*++mark, n_a);
1531 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1533 if (!(val = whichsig(s)))
1534 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1538 APPLY_TAINT_PROPER();
1541 /* kill() doesn't do process groups (job trees?) under VMS */
1542 if (val < 0) val = -val;
1543 if (val == SIGKILL) {
1544 # include <starlet.h>
1545 /* Use native sys$delprc() to insure that target process is
1546 * deleted; supervisor-mode images don't pay attention to
1547 * CRTL's emulation of Unix-style signals and kill()
1549 while (++mark <= sp) {
1550 I32 proc = SvIVx(*mark);
1551 register unsigned long int __vmssts;
1552 APPLY_TAINT_PROPER();
1553 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1557 case SS$_NOSUCHNODE:
1558 SETERRNO(ESRCH,__vmssts);
1561 SETERRNO(EPERM,__vmssts);
1564 SETERRNO(EVMSERR,__vmssts);
1573 while (++mark <= sp) {
1574 I32 proc = SvIVx(*mark);
1575 APPLY_TAINT_PROPER();
1577 if (PerlProc_killpg(proc,val)) /* BSD */
1579 if (PerlProc_kill(-proc,val)) /* SYSV */
1585 while (++mark <= sp) {
1586 I32 proc = SvIVx(*mark);
1587 APPLY_TAINT_PROPER();
1588 if (PerlProc_kill(proc, val))
1596 APPLY_TAINT_PROPER();
1598 while (++mark <= sp) {
1599 s = SvPVx(*mark, n_a);
1600 APPLY_TAINT_PROPER();
1601 if (PL_euid || PL_unsafe) {
1605 else { /* don't let root wipe out directories without -U */
1606 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1618 APPLY_TAINT_PROPER();
1619 if (sp - mark > 2) {
1620 #if defined(I_UTIME) || defined(VMS)
1621 struct utimbuf utbuf;
1629 Zero(&utbuf, sizeof utbuf, char);
1631 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1632 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1634 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1635 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
1637 APPLY_TAINT_PROPER();
1639 while (++mark <= sp) {
1640 char *name = SvPVx(*mark, n_a);
1641 APPLY_TAINT_PROPER();
1642 if (PerlLIO_utime(name, &utbuf))
1653 #undef APPLY_TAINT_PROPER
1656 /* Do the permissions allow some operation? Assumes statcache already set. */
1657 #ifndef VMS /* VMS' cando is in vms.c */
1659 Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register Stat_t *statbufp)
1660 /* Note: we use `effective' both for uids and gids.
1661 * Here we are betting on Uid_t being equal or wider than Gid_t. */
1664 /* [Comments and code from Len Reed]
1665 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1666 * to write-protected files. The execute permission bit is set
1667 * by the Miscrosoft C library stat() function for the following:
1672 * All files and directories are readable.
1673 * Directories and special files, e.g. "CON", cannot be
1675 * [Comment by Tom Dinger -- a directory can have the write-protect
1676 * bit set in the file system, but DOS permits changes to
1677 * the directory anyway. In addition, all bets are off
1678 * here for networked software, such as Novell and
1682 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1683 * too so it will actually look into the files for magic numbers
1685 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1687 #else /* ! DOSISH */
1688 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1689 if (mode == S_IXUSR) {
1690 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1694 return TRUE; /* root reads and writes anything */
1697 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1698 if (statbufp->st_mode & mode)
1699 return TRUE; /* ok as "user" */
1701 else if (ingroup(statbufp->st_gid,effective)) {
1702 if (statbufp->st_mode & mode >> 3)
1703 return TRUE; /* ok as "group" */
1705 else if (statbufp->st_mode & mode >> 6)
1706 return TRUE; /* ok as "other" */
1708 #endif /* ! DOSISH */
1713 Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
1715 #ifdef MACOS_TRADITIONAL
1716 /* This is simply not correct for AppleShare, but fix it yerself. */
1719 if (testgid == (effective ? PL_egid : PL_gid))
1721 #ifdef HAS_GETGROUPS
1726 Groups_t gary[NGROUPS];
1729 anum = getgroups(NGROUPS,gary);
1731 if (gary[anum] == testgid)
1739 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1742 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1748 key = (key_t)SvNVx(*++mark);
1749 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1750 flags = SvIVx(*++mark);
1756 return msgget(key, flags);
1760 return semget(key, n, flags);
1764 return shmget(key, n, flags);
1766 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1768 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1771 return -1; /* should never happen */
1775 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
1780 I32 id, n, cmd, infosize, getinfo;
1783 id = SvIVx(*++mark);
1784 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1785 cmd = SvIVx(*++mark);
1788 getinfo = (cmd == IPC_STAT);
1794 if (cmd == IPC_STAT || cmd == IPC_SET)
1795 infosize = sizeof(struct msqid_ds);
1800 if (cmd == IPC_STAT || cmd == IPC_SET)
1801 infosize = sizeof(struct shmid_ds);
1807 if (cmd == IPC_STAT || cmd == IPC_SET)
1808 infosize = sizeof(struct semid_ds);
1809 else if (cmd == GETALL || cmd == SETALL)
1811 struct semid_ds semds;
1813 #ifdef EXTRA_F_IN_SEMUN_BUF
1814 semun.buff = &semds;
1818 getinfo = (cmd == GETALL);
1819 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1821 infosize = semds.sem_nsems * sizeof(short);
1822 /* "short" is technically wrong but much more portable
1823 than guessing about u_?short(_t)? */
1826 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1830 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1832 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1841 SvPV_force(astr, len);
1842 a = SvGROW(astr, infosize+1);
1846 a = SvPV(astr, len);
1847 if (len != infosize)
1848 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
1857 a = INT2PTR(char *,i); /* ouch */
1864 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1870 union semun unsemds;
1872 #ifdef EXTRA_F_IN_SEMUN_BUF
1873 unsemds.buff = (struct semid_ds *)a;
1875 unsemds.buf = (struct semid_ds *)a;
1877 ret = Semctl(id, n, cmd, unsemds);
1879 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1886 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1890 if (getinfo && ret >= 0) {
1891 SvCUR_set(astr, infosize);
1892 *SvEND(astr) = '\0';
1899 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
1905 I32 id, msize, flags;
1908 id = SvIVx(*++mark);
1910 flags = SvIVx(*++mark);
1911 mbuf = SvPV(mstr, len);
1912 if ((msize = len - sizeof(long)) < 0)
1913 Perl_croak(aTHX_ "Arg too short for msgsnd");
1915 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1917 Perl_croak(aTHX_ "msgsnd not implemented");
1922 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
1929 I32 id, msize, flags, ret;
1932 id = SvIVx(*++mark);
1934 /* suppress warning when reading into undef var --jhi */
1936 sv_setpvn(mstr, "", 0);
1937 msize = SvIVx(*++mark);
1938 mtype = (long)SvIVx(*++mark);
1939 flags = SvIVx(*++mark);
1940 SvPV_force(mstr, len);
1941 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1944 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1946 SvCUR_set(mstr, sizeof(long)+ret);
1947 *SvEND(mstr) = '\0';
1948 #ifndef INCOMPLETE_TAINTS
1949 /* who knows who has been playing with this message? */
1955 Perl_croak(aTHX_ "msgrcv not implemented");
1960 Perl_do_semop(pTHX_ SV **mark, SV **sp)
1969 id = SvIVx(*++mark);
1971 opbuf = SvPV(opstr, opsize);
1972 if (opsize < sizeof(struct sembuf)
1973 || (opsize % sizeof(struct sembuf)) != 0) {
1974 SETERRNO(EINVAL,LIB$_INVARG);
1978 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1980 Perl_croak(aTHX_ "semop not implemented");
1985 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
1991 I32 id, mpos, msize;
1993 struct shmid_ds shmds;
1995 id = SvIVx(*++mark);
1997 mpos = SvIVx(*++mark);
1998 msize = SvIVx(*++mark);
2000 if (shmctl(id, IPC_STAT, &shmds) == -1)
2002 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
2003 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
2006 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2007 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2009 if (optype == OP_SHMREAD) {
2010 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2012 sv_setpvn(mstr, "", 0);
2013 SvPV_force(mstr, len);
2014 mbuf = SvGROW(mstr, msize+1);
2016 Copy(shm + mpos, mbuf, msize, char);
2017 SvCUR_set(mstr, msize);
2018 *SvEND(mstr) = '\0';
2020 #ifndef INCOMPLETE_TAINTS
2021 /* who knows who has been playing with this shared memory? */
2028 mbuf = SvPV(mstr, len);
2029 if ((n = len) > msize)
2031 Copy(mbuf, shm + mpos, n, char);
2033 memzero(shm + mpos + n, msize - n);
2037 Perl_croak(aTHX_ "shm I/O not implemented");
2041 #endif /* SYSV IPC */