3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "Far below them they saw the white waters pour into a foaming bowl, and
13 * then swirl darkly about a deep oval basin in the rocks, until they found
14 * their way out again through a narrow gate, and flowed away, fuming and
15 * chattering, into calmer and more level reaches."
18 /* This file contains functions that do the actual I/O on behalf of ops.
19 * For example, pp_print() calls the do_print() function in this file for
20 * each argument needing printing.
24 #define PERL_IN_DOIO_C
27 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
36 # ifndef HAS_SHMAT_PROTOTYPE
37 extern Shmat_t shmat (int, char *, int);
43 # if defined(_MSC_VER) || defined(__MINGW32__)
44 # include <sys/utime.h>
51 # define OPEN_EXCL O_EXCL
56 #define PERL_MODE_MAX 8
57 #define PERL_FLAGS_MAX 10
62 Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw,
63 int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
67 register IO * const io = GvIOn(gv);
68 PerlIO *saveifp = Nullfp;
69 PerlIO *saveofp = Nullfp;
71 char savetype = IoTYPE_CLOSED;
76 bool was_fdopen = FALSE;
77 bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
79 char mode[PERL_MODE_MAX]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */
82 Zero(mode,sizeof(mode),char);
83 PL_forkprocess = 1; /* assume true if no fork */
85 /* Collect default raw/crlf info from the op */
86 if (PL_op && PL_op->op_type == OP_OPEN) {
87 /* set up IO layers */
88 const U8 flags = PL_op->op_private;
89 in_raw = (flags & OPpOPEN_IN_RAW);
90 in_crlf = (flags & OPpOPEN_IN_CRLF);
91 out_raw = (flags & OPpOPEN_OUT_RAW);
92 out_crlf = (flags & OPpOPEN_OUT_CRLF);
95 /* If currently open - close before we re-open */
97 fd = PerlIO_fileno(IoIFP(io));
98 if (IoTYPE(io) == IoTYPE_STD) {
99 /* This is a clone of one of STD* handles */
102 else if (fd >= 0 && fd <= PL_maxsysfd) {
103 /* This is one of the original STD* handles */
106 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 /* Why is this not Perl_warn*() call ? */
124 PerlIO_printf(Perl_error_log,
125 "Warning: unable to close filehandle %s properly.\n",
128 IoOFP(io) = IoIFP(io) = Nullfp;
132 /* sysopen style args, i.e. integer mode and permissions */
134 const int appendtrunc =
136 #ifdef O_APPEND /* Not fully portable. */
139 #ifdef O_TRUNC /* Not fully portable. */
143 const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
147 Perl_croak(aTHX_ "panic: sysopen with multiple args");
155 It might be (in OS/390 and Mac OS Classic it is)
161 This means that simple & with O_RDWR would look
162 like O_RDONLY is present. Therefore we have to
165 if ((ismodifying = (rawmode & modifyingmode))) {
166 if ((ismodifying & O_WRONLY) == O_WRONLY ||
167 (ismodifying & O_RDWR) == O_RDWR ||
168 (ismodifying & (O_CREAT|appendtrunc)))
169 TAINT_PROPER("sysopen");
171 mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
173 #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
174 rawmode |= O_LARGEFILE; /* Transparently largefiley. */
177 IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
179 namesv = sv_2mortal(newSVpv(oname,0));
183 fp = PerlIO_openn(aTHX_ type, mode, -1, rawmode, rawperm, NULL, num_svs, svp);
186 /* Regular (non-sys) open */
191 PerlIO *that_fp = NULL;
193 type = savepvn(oname, len);
197 /* Lose leading and trailing white space */
198 for (; isSPACE(*type); type++) ;
199 while (tend > type && isSPACE(tend[-1]))
203 /* New style explicit name, type is just mode and layer info */
205 if (SvROK(*svp) && !strchr(oname,'&')) {
207 Perl_warner(aTHX_ packWARN(WARN_IO),
208 "Can't open a reference");
209 SETERRNO(EINVAL, LIB_INVARG);
212 #endif /* USE_STDIO */
213 name = SvOK(*svp) ? savesvpv (*svp) : savepvn ("", 0);
221 if ((*type == IoTYPE_RDWR) && /* scary */
222 (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
223 ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
224 TAINT_PROPER("open");
229 if (*type == IoTYPE_PIPE) {
231 if (type[1] != IoTYPE_STD) {
233 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
237 for (type++; isSPACE(*type); type++) ;
243 /* command is missing 19990114 */
244 if (ckWARN(WARN_PIPE))
245 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
249 if ((*name == '-' && name[1] == '\0') || num_svs)
251 TAINT_PROPER("piped open");
252 if (!num_svs && name[len-1] == '|') {
254 if (ckWARN(WARN_PIPE))
255 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
261 strlcat(mode, "b", PERL_MODE_MAX);
263 strlcat(mode, "t", PERL_MODE_MAX);
271 fp = PerlProc_popen_list(mode, num_svs, svp);
274 fp = PerlProc_popen(name,mode);
278 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
284 else if (*type == IoTYPE_WRONLY) {
285 TAINT_PROPER("open");
287 if (*type == IoTYPE_WRONLY) {
288 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
289 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
299 strlcat(mode, "b", PERL_MODE_MAX);
301 strlcat(mode, "t", PERL_MODE_MAX);
310 dodup = PERLIO_DUP_FD;
316 if (!num_svs && !*type && supplied_fp) {
317 /* "<+&" etc. is used by typemaps */
322 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
324 for (; isSPACE(*type); type++) ;
325 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
329 else if (isDIGIT(*type)) {
335 thatio = sv_2io(*svp);
339 thatgv = gv_fetchpv(type,0,SVt_PVIO);
340 thatio = GvIO(thatgv);
344 SETERRNO(EINVAL,SS_IVCHAN);
348 if ((that_fp = IoIFP(thatio))) {
349 /* Flush stdio buffer before dup. --mjd
350 * Unfortunately SEEK_CURing 0 seems to
351 * be optimized away on most platforms;
352 * only Solaris and Linux seem to flush
355 /* sfio fails to clear error on next
356 sfwrite, contrary to documentation.
358 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
359 PerlIO_clearerr(that_fp);
361 /* On the other hand, do all platforms
362 * take gracefully to flushing a read-only
363 * filehandle? Perhaps we should do
364 * fsetpos(src)+fgetpos(dst)? --nik */
365 PerlIO_flush(that_fp);
366 fd = PerlIO_fileno(that_fp);
367 /* When dup()ing STDIN, STDOUT or STDERR
368 * explicitly set appropriate access mode */
369 if (that_fp == PerlIO_stdout()
370 || that_fp == PerlIO_stderr())
371 IoTYPE(io) = IoTYPE_WRONLY;
372 else if (that_fp == PerlIO_stdin())
373 IoTYPE(io) = IoTYPE_RDONLY;
374 /* When dup()ing a socket, say result is
376 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
377 IoTYPE(io) = IoTYPE_SOCKET;
385 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
389 fd = PerlLIO_dup(fd);
392 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
393 if (dodup && fd >= 0)
400 for (; isSPACE(*type); type++) ;
401 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
403 fp = PerlIO_stdout();
404 IoTYPE(io) = IoTYPE_STD;
406 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
411 namesv = sv_2mortal(newSVpvn(type,tend - type));
416 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
419 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
420 goto unknown_open_mode;
421 } /* IoTYPE_WRONLY */
422 else if (*type == IoTYPE_RDONLY) {
423 for (type++; isSPACE(*type); type++) ;
427 strlcat(mode, "b", PERL_MODE_MAX);
429 strlcat(mode, "t", PERL_MODE_MAX);
439 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
442 IoTYPE(io) = IoTYPE_STD;
444 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
449 namesv = sv_2mortal(newSVpvn(type,tend - type));
454 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
456 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
457 goto unknown_open_mode;
458 } /* IoTYPE_RDONLY */
459 else if ((num_svs && /* '-|...' or '...|' */
460 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
461 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
463 type += 2; /* skip over '-|' */
467 while (tend > type && isSPACE(tend[-1]))
469 for (; isSPACE(*type); type++)
475 /* command is missing 19990114 */
476 if (ckWARN(WARN_PIPE))
477 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
481 if (!(*name == '-' && name[1] == '\0') || num_svs)
483 TAINT_PROPER("piped open");
488 strlcat(mode, "b", PERL_MODE_MAX);
490 strlcat(mode, "t", PERL_MODE_MAX);
499 fp = PerlProc_popen_list(mode,num_svs,svp);
502 fp = PerlProc_popen(name,mode);
504 IoTYPE(io) = IoTYPE_PIPE;
506 for (; isSPACE(*type); type++) ;
508 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
514 else { /* layer(Args) */
516 goto unknown_open_mode;
518 IoTYPE(io) = IoTYPE_RDONLY;
519 for (; isSPACE(*name); name++)
525 strlcat(mode, "b", PERL_MODE_MAX);
527 strlcat(mode, "t", PERL_MODE_MAX);
535 if (*name == '-' && name[1] == '\0') {
537 IoTYPE(io) = IoTYPE_STD;
541 namesv = sv_2mortal(newSVpvn(type,tend - type));
546 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
551 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
552 && strchr(oname, '\n')
555 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
559 if (ckWARN(WARN_IO)) {
560 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
561 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
562 Perl_warner(aTHX_ packWARN(WARN_IO),
563 "Filehandle STD%s reopened as %s only for input",
564 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
567 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
568 Perl_warner(aTHX_ packWARN(WARN_IO),
569 "Filehandle STDIN reopened as %s only for output",
574 fd = PerlIO_fileno(fp);
575 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
576 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
577 * type probe for socket-ness.
579 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
580 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
581 /* If PerlIO claims to have fd we had better be able to fstat() it. */
582 (void) PerlIO_close(fp);
586 if (S_ISSOCK(PL_statbuf.st_mode))
587 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
591 !(PL_statbuf.st_mode & S_IFMT)
595 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
596 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
597 ) { /* on OS's that return 0 on fstat()ed pipe */
599 Sock_size_t buflen = sizeof tmpbuf;
600 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
601 || errno != ENOTSOCK)
602 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
603 /* but some return 0 for streams too, sigh */
605 #endif /* HAS_SOCKET */
606 #endif /* !PERL_MICRO */
610 * If this is a standard handle we discard all the layer stuff
611 * and just dup the fd into whatever was on the handle before !
614 if (saveifp) { /* must use old fp? */
615 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
616 then dup the new fileno down
619 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
620 if (saveofp != saveifp) { /* was a socket? */
621 PerlIO_close(saveofp);
625 /* Still a small can-of-worms here if (say) PerlIO::scalar
626 is assigned to (say) STDOUT - for now let dup2() fail
627 and provide the error
629 if (PerlLIO_dup2(fd, savefd) < 0) {
630 (void)PerlIO_close(fp);
634 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
635 char newname[FILENAME_MAX+1];
636 if (PerlIO_getname(fp, newname)) {
637 if (fd == PerlIO_fileno(PerlIO_stdout()))
638 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
639 if (fd == PerlIO_fileno(PerlIO_stderr()))
640 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
646 /* PL_fdpid isn't used on Windows, so avoid this useless work.
647 * XXX Probably the same for a lot of other places. */
653 sv = *av_fetch(PL_fdpid,fd,TRUE);
654 SvUPGRADE(sv, SVt_IV);
657 sv = *av_fetch(PL_fdpid,savefd,TRUE);
658 SvUPGRADE(sv, SVt_IV);
665 /* need to close fp without closing underlying fd */
666 int ofd = PerlIO_fileno(fp);
667 int dupfd = PerlLIO_dup(ofd);
668 #if defined(HAS_FCNTL) && defined(F_SETFD)
669 /* Assume if we have F_SETFD we have F_GETFD */
670 int coe = fcntl(ofd,F_GETFD);
673 PerlLIO_dup2(dupfd,ofd);
674 #if defined(HAS_FCNTL) && defined(F_SETFD)
675 /* The dup trick has lost close-on-exec on ofd */
676 fcntl(ofd,F_SETFD, coe);
678 PerlLIO_close(dupfd);
685 fd = PerlIO_fileno(fp);
687 #if defined(HAS_FCNTL) && defined(F_SETFD)
689 const int save_errno = errno;
690 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
696 IoFLAGS(io) &= ~IOf_NOLINE;
698 if (IoTYPE(io) == IoTYPE_SOCKET
699 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
701 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
704 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
718 IoTYPE(io) = savetype;
723 Perl_nextargv(pTHX_ register GV *gv)
727 #ifndef FLEXFILENAMES
733 IO * const io = GvIOp(gv);
736 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
737 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
738 IoFLAGS(io) &= ~IOf_START;
740 if (!PL_argvout_stack)
741 PL_argvout_stack = newAV();
742 av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv));
745 if (PL_filemode & (S_ISUID|S_ISGID)) {
746 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
749 (void)fchmod(PL_lastfd,PL_filemode);
751 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
758 while (av_len(GvAV(gv)) >= 0) {
760 sv = av_shift(GvAV(gv));
762 sv_setsv(GvSVn(gv),sv);
763 SvSETMAGIC(GvSV(gv));
764 PL_oldname = SvPVx(GvSV(gv), oldlen);
765 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
767 TAINT_PROPER("inplace open");
768 if (oldlen == 1 && *PL_oldname == '-') {
769 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
770 return IoIFP(GvIOp(gv));
772 #ifndef FLEXFILENAMES
773 filedev = PL_statbuf.st_dev;
774 fileino = PL_statbuf.st_ino;
776 PL_filemode = PL_statbuf.st_mode;
777 fileuid = PL_statbuf.st_uid;
778 filegid = PL_statbuf.st_gid;
779 if (!S_ISREG(PL_filemode)) {
780 if (ckWARN_d(WARN_INPLACE))
781 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
782 "Can't do inplace edit: %s is not a regular file",
788 const char *star = strchr(PL_inplace, '*');
790 const char *begin = PL_inplace;
791 sv_setpvn(sv, "", 0);
793 sv_catpvn(sv, begin, star - begin);
794 sv_catpvn(sv, PL_oldname, oldlen);
796 } while ((star = strchr(begin, '*')));
801 sv_catpv(sv,PL_inplace);
803 #ifndef FLEXFILENAMES
804 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
805 && PL_statbuf.st_dev == filedev
806 && PL_statbuf.st_ino == fileino)
808 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
812 if (ckWARN_d(WARN_INPLACE))
813 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
814 "Can't do inplace edit: %"SVf" would not be unique",
821 #if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
822 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
823 if (ckWARN_d(WARN_INPLACE))
824 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
825 "Can't rename %s to %"SVf": %s, skipping file",
826 PL_oldname, sv, Strerror(errno) );
832 (void)PerlLIO_unlink(SvPVX_const(sv));
833 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
834 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),PL_inplace!=0,
838 (void)UNLINK(SvPVX_const(sv));
839 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
840 if (ckWARN_d(WARN_INPLACE))
841 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
842 "Can't rename %s to %"SVf": %s, skipping file",
843 PL_oldname, sv, Strerror(errno) );
847 (void)UNLINK(PL_oldname);
851 #if !defined(DOSISH) && !defined(AMIGAOS)
852 # ifndef VMS /* Don't delete; use automatic file versioning */
853 if (UNLINK(PL_oldname) < 0) {
854 if (ckWARN_d(WARN_INPLACE))
855 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
856 "Can't remove %s: %s, skipping file",
857 PL_oldname, Strerror(errno) );
863 Perl_croak(aTHX_ "Can't do inplace edit without backup");
867 sv_setpvn(sv,">",!PL_inplace);
868 sv_catpvn(sv,PL_oldname,oldlen);
869 SETERRNO(0,0); /* in case sprintf set errno */
871 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
872 PL_inplace!=0,O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp))
874 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
875 PL_inplace!=0,O_WRONLY|O_CREAT|OPEN_EXCL,0666,
879 if (ckWARN_d(WARN_INPLACE))
880 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
881 PL_oldname, Strerror(errno) );
885 setdefout(PL_argvoutgv);
886 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
887 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
889 (void)fchmod(PL_lastfd,PL_filemode);
891 # if !(defined(WIN32) && defined(__BORLANDC__))
892 /* Borland runtime creates a readonly file! */
893 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
896 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
898 (void)fchown(PL_lastfd,fileuid,filegid);
901 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
906 return IoIFP(GvIOp(gv));
909 if (ckWARN_d(WARN_INPLACE)) {
910 const int eno = errno;
911 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
912 && !S_ISREG(PL_statbuf.st_mode))
914 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
915 "Can't do inplace edit: %s is not a regular file",
919 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
920 PL_oldname, Strerror(eno));
924 if (io && (IoFLAGS(io) & IOf_ARGV))
925 IoFLAGS(io) |= IOf_START;
927 (void)do_close(PL_argvoutgv,FALSE);
928 if (io && (IoFLAGS(io) & IOf_ARGV)
929 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
931 GV *oldout = (GV*)av_pop(PL_argvout_stack);
933 SvREFCNT_dec(oldout);
936 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
941 /* explicit renamed to avoid C++ conflict -- kja */
943 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
951 if (!gv || SvTYPE(gv) != SVt_PVGV) {
953 SETERRNO(EBADF,SS_IVCHAN);
957 if (!io) { /* never opened */
959 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
960 report_evil_fh(gv, io, PL_op->op_type);
961 SETERRNO(EBADF,SS_IVCHAN);
965 retval = io_close(io, not_implicit);
969 IoLINES_LEFT(io) = IoPAGE_LEN(io);
971 IoTYPE(io) = IoTYPE_CLOSED;
976 Perl_io_close(pTHX_ IO *io, bool not_implicit)
982 if (IoTYPE(io) == IoTYPE_PIPE) {
983 const int status = PerlProc_pclose(IoIFP(io));
985 STATUS_NATIVE_CHILD_SET(status);
986 retval = (STATUS_UNIX == 0);
989 retval = (status != -1);
992 else if (IoTYPE(io) == IoTYPE_STD)
995 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
996 const bool prev_err = PerlIO_error(IoOFP(io));
997 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
998 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
1001 const bool prev_err = PerlIO_error(IoIFP(io));
1002 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1005 IoOFP(io) = IoIFP(io) = Nullfp;
1007 else if (not_implicit) {
1008 SETERRNO(EBADF,SS_IVCHAN);
1015 Perl_do_eof(pTHX_ GV *gv)
1018 register IO * const io = GvIO(gv);
1022 else if ((IoTYPE(io) == IoTYPE_WRONLY) && ckWARN(WARN_IO))
1023 report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY);
1026 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1027 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1028 return FALSE; /* this is the most usual case */
1032 /* getc and ungetc can stomp on errno */
1033 const int saverrno = errno;
1034 const int ch = PerlIO_getc(IoIFP(io));
1036 (void)PerlIO_ungetc(IoIFP(io),ch);
1043 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1044 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1045 PerlIO_set_cnt(IoIFP(io),-1);
1047 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1048 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
1052 return TRUE; /* normal fp, definitely end of file */
1058 Perl_do_tell(pTHX_ GV *gv)
1061 register IO *io = NULL;
1062 register PerlIO *fp;
1064 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1065 #ifdef ULTRIX_STDIO_BOTCH
1067 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1069 return PerlIO_tell(fp);
1071 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1072 report_evil_fh(gv, io, PL_op->op_type);
1073 SETERRNO(EBADF,RMS_IFI);
1078 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1081 register IO *io = NULL;
1082 register PerlIO *fp;
1084 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1085 #ifdef ULTRIX_STDIO_BOTCH
1087 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1089 return PerlIO_seek(fp, pos, whence) >= 0;
1091 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1092 report_evil_fh(gv, io, PL_op->op_type);
1093 SETERRNO(EBADF,RMS_IFI);
1098 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1101 register IO *io = NULL;
1102 register PerlIO *fp;
1104 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
1105 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1106 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1107 report_evil_fh(gv, io, PL_op->op_type);
1108 SETERRNO(EBADF,RMS_IFI);
1113 Perl_mode_from_discipline(pTHX_ SV *discp)
1115 int mode = O_BINARY;
1118 const char *s = SvPV_const(discp,len);
1123 if (s[2] == 'a' && s[3] == 'w'
1124 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1133 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1134 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1143 goto fail_discipline;
1146 else if (isSPACE(*s)) {
1153 end = strchr(s+1, ':');
1156 #ifndef PERLIO_LAYERS
1157 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1168 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1170 my_chsize(int fd, Off_t length)
1173 /* code courtesy of William Kucharski */
1179 if (PerlLIO_fstat(fd, &filebuf) < 0)
1182 if (filebuf.st_size < length) {
1184 /* extend file length */
1186 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1189 /* write a "0" byte */
1191 if ((PerlLIO_write(fd, "", 1)) != 1)
1195 /* truncate length */
1199 fl.l_start = length;
1200 fl.l_type = F_WRLCK; /* write lock on file space */
1203 * This relies on the UNDOCUMENTED F_FREESP argument to
1204 * fcntl(2), which truncates the file so that it ends at the
1205 * position indicated by fl.l_start.
1207 * Will minor miracles never cease?
1210 if (fcntl(fd, F_FREESP, &fl) < 0)
1216 Perl_croak_nocontext("truncate not implemented");
1217 #endif /* F_FREESP */
1220 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1223 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1226 register const char *tmps;
1229 /* assuming fp is checked earlier */
1232 switch (SvTYPE(sv)) {
1234 if (ckWARN(WARN_UNINITIALIZED))
1241 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1243 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1244 return !PerlIO_error(fp);
1248 if (PerlIO_isutf8(fp)) {
1250 sv_utf8_upgrade_flags(sv = sv_mortalcopy(sv),
1251 SV_GMAGIC|SV_UTF8_NO_ENCODING);
1253 else if (DO_UTF8(sv)) {
1254 if (!sv_utf8_downgrade((sv = sv_mortalcopy(sv)), TRUE)
1255 && ckWARN_d(WARN_UTF8))
1257 Perl_warner(aTHX_ packWARN(WARN_UTF8), "Wide character in print");
1260 tmps = SvPV_const(sv, len);
1263 /* To detect whether the process is about to overstep its
1264 * filesize limit we would need getrlimit(). We could then
1265 * also transparently raise the limit with setrlimit() --
1266 * but only until the system hard limit/the filesystem limit,
1267 * at which we would get EPERM. Note that when using buffered
1268 * io the write failure can be delayed until the flush/close. --jhi */
1269 if (len && (PerlIO_write(fp,tmps,len) == 0))
1271 return !PerlIO_error(fp);
1282 if (PL_op->op_flags & OPf_REF) {
1287 if (io && IoIFP(io)) {
1289 sv_setpvn(PL_statname,"", 0);
1290 PL_laststype = OP_STAT;
1291 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1295 return PL_laststatval;
1296 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1297 report_evil_fh(gv, io, PL_op->op_type);
1299 sv_setpvn(PL_statname,"", 0);
1300 return (PL_laststatval = -1);
1303 else if (PL_op->op_private & OPpFT_STACKED) {
1304 return PL_laststatval;
1307 SV* const sv = POPs;
1311 if (SvTYPE(sv) == SVt_PVGV) {
1315 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1320 s = SvPV_const(sv, len);
1322 sv_setpvn(PL_statname, s, len);
1323 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1324 PL_laststype = OP_STAT;
1325 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1326 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1327 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1328 return PL_laststatval;
1337 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
1340 if (PL_op->op_flags & OPf_REF) {
1342 if (cGVOP_gv == PL_defgv) {
1343 if (PL_laststype != OP_LSTAT)
1344 Perl_croak(aTHX_ no_prev_lstat);
1345 return PL_laststatval;
1347 if (ckWARN(WARN_IO)) {
1348 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1350 return (PL_laststatval = -1);
1353 else if (PL_laststype != OP_LSTAT
1354 && (PL_op->op_private & OPpFT_STACKED) && ckWARN(WARN_IO))
1355 Perl_croak(aTHX_ no_prev_lstat);
1357 PL_laststype = OP_LSTAT;
1361 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV && ckWARN(WARN_IO)) {
1362 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1363 GvENAME((GV*) SvRV(sv)));
1364 return (PL_laststatval = -1);
1366 /* XXX Do really need to be calling SvPV() all these times? */
1367 sv_setpv(PL_statname,SvPV_nolen_const(sv));
1368 PL_laststatval = PerlLIO_lstat(SvPV_nolen_const(sv),&PL_statcache);
1369 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV_nolen_const(sv), '\n'))
1370 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1371 return PL_laststatval;
1375 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1376 int fd, int do_report)
1379 #if defined(MACOS_TRADITIONAL) || defined(__SYMBIAN32__)
1380 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1384 const char *tmps = NULL;
1385 Newx(PL_Argv, sp - mark + 1, char*);
1388 while (++mark <= sp) {
1390 *a++ = (char*)SvPV_nolen_const(*mark);
1396 tmps = SvPV_nolen_const(really);
1397 if ((!really && *PL_Argv[0] != '/') ||
1398 (really && *tmps != '/')) /* will execvp use PATH? */
1399 TAINT_ENV(); /* testing IFS here is overkill, probably */
1401 if (really && *tmps)
1402 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1404 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1406 if (ckWARN(WARN_EXEC))
1407 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1408 (really ? tmps : PL_Argv[0]), Strerror(errno));
1410 const int e = errno;
1412 PerlLIO_write(fd, (void*)&e, sizeof(int));
1422 Perl_do_execfree(pTHX)
1426 PL_Argv = Null(char **);
1431 #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
1434 Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
1441 /* Make a copy so we can change it */
1442 const int cmdlen = strlen(incmd);
1443 Newx(cmd, cmdlen+1, char);
1444 strncpy(cmd, incmd, cmdlen);
1447 while (*cmd && isSPACE(*cmd))
1450 /* save an extra exec if possible */
1454 char flags[PERL_FLAGS_MAX];
1455 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1456 strnEQ(cmd+PL_cshlen," -c",3)) {
1458 strlcpy(flags, "-c", PERL_FLAGS_MAX);
1462 s = cmd+PL_cshlen+3;
1466 strlcat(flags, "f", PERL_FLAGS_MAX);
1474 char * const ncmd = s;
1480 if (s[-1] == '\'') {
1483 PerlProc_execl(PL_cshname,"csh", flags, ncmd, (char*)0);
1494 /* see if there are shell metacharacters in it */
1496 if (*cmd == '.' && isSPACE(cmd[1]))
1499 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1502 for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */
1506 for (s = cmd; *s; s++) {
1507 if (*s != ' ' && !isALPHA(*s) &&
1508 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1509 if (*s == '\n' && !s[1]) {
1513 /* handle the 2>&1 construct at the end */
1514 if (*s == '>' && s[1] == '&' && s[2] == '1'
1515 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1516 && (!s[3] || isSPACE(s[3])))
1518 const char *t = s + 3;
1520 while (*t && isSPACE(*t))
1522 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1529 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1536 Newx(PL_Argv, (s - cmd) / 2 + 2, char*);
1537 PL_Cmd = savepvn(cmd, s-cmd);
1539 for (s = PL_Cmd; *s;) {
1540 while (*s && isSPACE(*s)) s++;
1543 while (*s && !isSPACE(*s)) s++;
1550 PerlProc_execvp(PL_Argv[0],PL_Argv);
1552 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1556 if (ckWARN(WARN_EXEC))
1557 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1558 PL_Argv[0], Strerror(errno));
1560 const int e = errno;
1561 PerlLIO_write(fd, (const void*)&e, sizeof(int));
1570 #endif /* OS2 || WIN32 */
1573 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1577 register I32 tot = 0;
1578 const char *const what = PL_op_name[type];
1580 SV ** const oldmark = mark;
1582 /* Doing this ahead of the switch statement preserves the old behaviour,
1583 where attempting to use kill as a taint test test would fail on
1584 platforms where kill was not defined. */
1586 if (type == OP_KILL)
1587 Perl_die(aTHX_ PL_no_func, what);
1590 if (type == OP_CHOWN)
1591 Perl_die(aTHX_ PL_no_func, what);
1595 #define APPLY_TAINT_PROPER() \
1597 if (PL_tainted) { TAINT_PROPER(what); } \
1600 /* This is a first heuristic; it doesn't catch tainting magic. */
1602 while (++mark <= sp) {
1603 if (SvTAINTED(*mark)) {
1612 APPLY_TAINT_PROPER();
1615 APPLY_TAINT_PROPER();
1617 while (++mark <= sp) {
1619 if (SvTYPE(*mark) == SVt_PVGV) {
1622 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1624 APPLY_TAINT_PROPER();
1625 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1628 Perl_die(aTHX_ PL_no_func, "fchmod");
1635 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1636 gv = (GV*)SvRV(*mark);
1640 const char *name = SvPV_nolen_const(*mark);
1641 APPLY_TAINT_PROPER();
1642 if (PerlLIO_chmod(name, val))
1650 APPLY_TAINT_PROPER();
1651 if (sp - mark > 2) {
1653 val = SvIVx(*++mark);
1654 val2 = SvIVx(*++mark);
1655 APPLY_TAINT_PROPER();
1657 while (++mark <= sp) {
1659 if (SvTYPE(*mark) == SVt_PVGV) {
1662 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1664 APPLY_TAINT_PROPER();
1665 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1668 Perl_die(aTHX_ PL_no_func, "fchown");
1675 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1676 gv = (GV*)SvRV(*mark);
1680 const char *name = SvPV_nolen_const(*mark);
1681 APPLY_TAINT_PROPER();
1682 if (PerlLIO_chown(name, val, val2))
1690 XXX Should we make lchown() directly available from perl?
1691 For now, we'll let Configure test for HAS_LCHOWN, but do
1692 nothing in the core.
1697 APPLY_TAINT_PROPER();
1700 s = SvPVx_nolen_const(*++mark);
1702 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1704 if ((val = whichsig(s)) < 0)
1705 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1709 APPLY_TAINT_PROPER();
1712 /* kill() doesn't do process groups (job trees?) under VMS */
1713 if (val < 0) val = -val;
1714 if (val == SIGKILL) {
1715 # include <starlet.h>
1716 /* Use native sys$delprc() to insure that target process is
1717 * deleted; supervisor-mode images don't pay attention to
1718 * CRTL's emulation of Unix-style signals and kill()
1720 while (++mark <= sp) {
1721 I32 proc = SvIVx(*mark);
1722 register unsigned long int __vmssts;
1723 APPLY_TAINT_PROPER();
1724 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1728 case SS$_NOSUCHNODE:
1729 SETERRNO(ESRCH,__vmssts);
1732 SETERRNO(EPERM,__vmssts);
1735 SETERRNO(EVMSERR,__vmssts);
1744 while (++mark <= sp) {
1745 const I32 proc = SvIVx(*mark);
1746 APPLY_TAINT_PROPER();
1748 if (PerlProc_killpg(proc,val)) /* BSD */
1750 if (PerlProc_kill(-proc,val)) /* SYSV */
1756 while (++mark <= sp) {
1757 const I32 proc = SvIVx(*mark);
1758 APPLY_TAINT_PROPER();
1759 if (PerlProc_kill(proc, val))
1766 APPLY_TAINT_PROPER();
1768 while (++mark <= sp) {
1769 s = SvPV_nolen_const(*mark);
1770 APPLY_TAINT_PROPER();
1771 if (PL_euid || PL_unsafe) {
1775 else { /* don't let root wipe out directories without -U */
1776 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1785 #if defined(HAS_UTIME) || defined(HAS_FUTIMES)
1787 APPLY_TAINT_PROPER();
1788 if (sp - mark > 2) {
1789 #if defined(HAS_FUTIMES)
1790 struct timeval utbuf[2];
1791 void *utbufp = utbuf;
1792 #elif defined(I_UTIME) || defined(VMS)
1793 struct utimbuf utbuf;
1794 struct utimbuf *utbufp = &utbuf;
1800 void *utbufp = &utbuf;
1803 SV* const accessed = *++mark;
1804 SV* const modified = *++mark;
1806 /* Be like C, and if both times are undefined, let the C
1807 * library figure out what to do. This usually means
1808 * "current time". */
1810 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
1813 Zero(&utbuf, sizeof utbuf, char);
1815 utbuf[0].tv_sec = (long)SvIVx(accessed); /* time accessed */
1816 utbuf[0].tv_usec = 0;
1817 utbuf[1].tv_sec = (long)SvIVx(modified); /* time modified */
1818 utbuf[1].tv_usec = 0;
1819 #elif defined(BIG_TIME)
1820 utbuf.actime = (Time_t)SvNVx(accessed); /* time accessed */
1821 utbuf.modtime = (Time_t)SvNVx(modified); /* time modified */
1823 utbuf.actime = (Time_t)SvIVx(accessed); /* time accessed */
1824 utbuf.modtime = (Time_t)SvIVx(modified); /* time modified */
1827 APPLY_TAINT_PROPER();
1829 while (++mark <= sp) {
1831 if (SvTYPE(*mark) == SVt_PVGV) {
1834 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1836 APPLY_TAINT_PROPER();
1837 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))), utbufp))
1840 Perl_die(aTHX_ PL_no_func, "futimes");
1847 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1848 gv = (GV*)SvRV(*mark);
1852 const char * const name = SvPV_nolen_const(*mark);
1853 APPLY_TAINT_PROPER();
1855 if (utimes(name, utbufp))
1857 if (PerlLIO_utime(name, utbufp))
1871 #undef APPLY_TAINT_PROPER
1874 /* Do the permissions allow some operation? Assumes statcache already set. */
1875 #ifndef VMS /* VMS' cando is in vms.c */
1877 Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp)
1878 /* effective is a flag, true for EUID, or for checking if the effective gid
1879 * is in the list of groups returned from getgroups().
1884 /* [Comments and code from Len Reed]
1885 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1886 * to write-protected files. The execute permission bit is set
1887 * by the Miscrosoft C library stat() function for the following:
1892 * All files and directories are readable.
1893 * Directories and special files, e.g. "CON", cannot be
1895 * [Comment by Tom Dinger -- a directory can have the write-protect
1896 * bit set in the file system, but DOS permits changes to
1897 * the directory anyway. In addition, all bets are off
1898 * here for networked software, such as Novell and
1902 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1903 * too so it will actually look into the files for magic numbers
1905 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1907 #else /* ! DOSISH */
1908 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1909 if (mode == S_IXUSR) {
1910 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1914 return TRUE; /* root reads and writes anything */
1917 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1918 if (statbufp->st_mode & mode)
1919 return TRUE; /* ok as "user" */
1921 else if (ingroup(statbufp->st_gid,effective)) {
1922 if (statbufp->st_mode & mode >> 3)
1923 return TRUE; /* ok as "group" */
1925 else if (statbufp->st_mode & mode >> 6)
1926 return TRUE; /* ok as "other" */
1928 #endif /* ! DOSISH */
1933 Perl_ingroup(pTHX_ Gid_t testgid, bool effective)
1935 #ifdef MACOS_TRADITIONAL
1936 /* This is simply not correct for AppleShare, but fix it yerself. */
1940 if (testgid == (effective ? PL_egid : PL_gid))
1942 #ifdef HAS_GETGROUPS
1944 Groups_t *gary = NULL;
1948 anum = getgroups(0, gary);
1949 Newx(gary, anum, Groups_t);
1950 anum = getgroups(anum, gary);
1952 if (gary[anum] == testgid) {
1965 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1968 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1971 const key_t key = (key_t)SvNVx(*++mark);
1972 const I32 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1973 const I32 flags = SvIVx(*++mark);
1981 return msgget(key, flags);
1985 return semget(key, n, flags);
1989 return shmget(key, n, flags);
1991 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1993 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1996 return -1; /* should never happen */
2000 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
2005 const I32 id = SvIVx(*++mark);
2006 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
2007 const I32 cmd = SvIVx(*++mark);
2008 SV * const astr = *++mark;
2009 STRLEN infosize = 0;
2010 I32 getinfo = (cmd == IPC_STAT);
2012 PERL_UNUSED_ARG(sp);
2018 if (cmd == IPC_STAT || cmd == IPC_SET)
2019 infosize = sizeof(struct msqid_ds);
2024 if (cmd == IPC_STAT || cmd == IPC_SET)
2025 infosize = sizeof(struct shmid_ds);
2031 if (cmd == IPC_STAT || cmd == IPC_SET)
2032 infosize = sizeof(struct semid_ds);
2033 else if (cmd == GETALL || cmd == SETALL)
2035 struct semid_ds semds;
2037 #ifdef EXTRA_F_IN_SEMUN_BUF
2038 semun.buff = &semds;
2042 getinfo = (cmd == GETALL);
2043 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2045 infosize = semds.sem_nsems * sizeof(short);
2046 /* "short" is technically wrong but much more portable
2047 than guessing about u_?short(_t)? */
2050 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2054 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2056 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2064 SvPV_force_nolen(astr);
2065 a = SvGROW(astr, infosize+1);
2070 a = SvPV(astr, len);
2071 if (len != infosize)
2072 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2080 const IV i = SvIV(astr);
2081 a = INT2PTR(char *,i); /* ouch */
2088 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2094 union semun unsemds;
2096 #ifdef EXTRA_F_IN_SEMUN_BUF
2097 unsemds.buff = (struct semid_ds *)a;
2099 unsemds.buf = (struct semid_ds *)a;
2101 ret = Semctl(id, n, cmd, unsemds);
2103 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2110 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2114 if (getinfo && ret >= 0) {
2115 SvCUR_set(astr, infosize);
2116 *SvEND(astr) = '\0';
2123 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2128 const I32 id = SvIVx(*++mark);
2129 SV * const mstr = *++mark;
2130 const I32 flags = SvIVx(*++mark);
2131 const char * const mbuf = SvPV_const(mstr, len);
2132 const I32 msize = len - sizeof(long);
2134 PERL_UNUSED_ARG(sp);
2137 Perl_croak(aTHX_ "Arg too short for msgsnd");
2139 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2141 Perl_croak(aTHX_ "msgsnd not implemented");
2146 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2152 I32 msize, flags, ret;
2153 const I32 id = SvIVx(*++mark);
2154 SV * const mstr = *++mark;
2155 PERL_UNUSED_ARG(sp);
2157 /* suppress warning when reading into undef var --jhi */
2159 sv_setpvn(mstr, "", 0);
2160 msize = SvIVx(*++mark);
2161 mtype = (long)SvIVx(*++mark);
2162 flags = SvIVx(*++mark);
2163 SvPV_force_nolen(mstr);
2164 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2167 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2169 SvCUR_set(mstr, sizeof(long)+ret);
2170 *SvEND(mstr) = '\0';
2171 #ifndef INCOMPLETE_TAINTS
2172 /* who knows who has been playing with this message? */
2178 Perl_croak(aTHX_ "msgrcv not implemented");
2183 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2188 const I32 id = SvIVx(*++mark);
2189 SV * const opstr = *++mark;
2190 const char * const opbuf = SvPV_const(opstr, opsize);
2191 PERL_UNUSED_ARG(sp);
2193 if (opsize < 3 * SHORTSIZE
2194 || (opsize % (3 * SHORTSIZE))) {
2195 SETERRNO(EINVAL,LIB_INVARG);
2199 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2201 const int nsops = opsize / (3 * sizeof (short));
2203 short * const ops = (short *) opbuf;
2205 struct sembuf *temps, *t;
2208 Newx (temps, nsops, struct sembuf);
2216 result = semop(id, temps, nsops);
2230 Perl_croak(aTHX_ "semop not implemented");
2235 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2240 struct shmid_ds shmds;
2241 const I32 id = SvIVx(*++mark);
2242 SV * const mstr = *++mark;
2243 const I32 mpos = SvIVx(*++mark);
2244 const I32 msize = SvIVx(*++mark);
2245 PERL_UNUSED_ARG(sp);
2248 if (shmctl(id, IPC_STAT, &shmds) == -1)
2250 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
2251 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2254 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2255 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2257 if (optype == OP_SHMREAD) {
2259 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2261 sv_setpvn(mstr, "", 0);
2262 SvPV_force_nolen(mstr);
2263 mbuf = SvGROW(mstr, msize+1);
2265 Copy(shm + mpos, mbuf, msize, char);
2266 SvCUR_set(mstr, msize);
2267 *SvEND(mstr) = '\0';
2269 #ifndef INCOMPLETE_TAINTS
2270 /* who knows who has been playing with this shared memory? */
2278 const char *mbuf = SvPV_const(mstr, len);
2279 if ((n = len) > msize)
2281 Copy(mbuf, shm + mpos, n, char);
2283 memzero(shm + mpos + n, msize - n);
2287 Perl_croak(aTHX_ "shm I/O not implemented");
2291 #endif /* SYSV IPC */
2296 =for apidoc start_glob
2298 Function called by C<do_readline> to spawn a glob (or do the glob inside
2299 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2300 this glob starter is only used by miniperl during the build process.
2301 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2307 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2310 SV * const tmpcmd = NEWSV(55, 0);
2314 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2315 /* since spawning off a process is a real performance hit */
2317 #include <descrip.h>
2318 #include <lib$routines.h>
2321 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
2322 char vmsspec[NAM$C_MAXRSS+1];
2323 char * const rstr = rslt + sizeof(unsigned short int);
2324 char *begin, *end, *cp;
2325 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
2328 struct dsc$descriptor_s wilddsc
2329 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2330 struct dsc$descriptor_vs rsdsc
2331 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
2332 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
2334 /* We could find out if there's an explicit dev/dir or version
2335 by peeking into lib$find_file's internal context at
2336 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
2337 but that's unsupported, so I don't want to do it now and
2338 have it bite someone in the future. */
2339 cp = SvPV(tmpglob,i);
2341 if (cp[i] == ';') hasver = 1;
2343 if (sts) hasver = 1;
2347 hasdir = isunix = 1;
2350 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
2355 if ((tmpfp = PerlIO_tmpfile()) != NULL) {
2357 if (!PerlLIO_stat(SvPVX_const(tmpglob),&st) && S_ISDIR(st.st_mode))
2358 ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL);
2359 else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
2360 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
2361 for (cp=wilddsc.dsc$a_pointer; ok && cp && *cp; cp++)
2362 if (*cp == '?') *cp = '%'; /* VMS style single-char wildcard */
2363 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
2364 &dfltdsc,NULL,NULL,NULL))&1)) {
2365 /* with varying string, 1st word of buffer contains result length */
2366 end = rstr + *((unsigned short int*)rslt);
2367 if (!hasver) while (*end != ';' && end > rstr) end--;
2368 *(end++) = '\n'; *end = '\0';
2369 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
2371 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
2376 while (*(--begin) != ']' && *begin != '>') ;
2379 ok = (PerlIO_puts(tmpfp,begin) != EOF);
2381 if (cxt) (void)lib$find_file_end(&cxt);
2382 if (ok && sts != RMS$_NMF &&
2383 sts != RMS$_DNF && sts != RMS_FNF) ok = 0;
2386 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
2388 PerlIO_close(tmpfp);
2392 PerlIO_rewind(tmpfp);
2393 IoTYPE(io) = IoTYPE_RDONLY;
2394 IoIFP(io) = fp = tmpfp;
2395 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
2400 #ifdef MACOS_TRADITIONAL
2401 sv_setpv(tmpcmd, "glob ");
2402 sv_catsv(tmpcmd, tmpglob);
2403 sv_catpv(tmpcmd, " |");
2407 sv_setpv(tmpcmd, "for a in ");
2408 sv_catsv(tmpcmd, tmpglob);
2409 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2412 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2413 sv_catsv(tmpcmd, tmpglob);
2415 sv_setpv(tmpcmd, "perlglob ");
2416 sv_catsv(tmpcmd, tmpglob);
2417 sv_catpv(tmpcmd, " |");
2422 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2423 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2424 sv_catsv(tmpcmd, tmpglob);
2425 sv_catpv(tmpcmd, "' 2>/dev/null |");
2427 sv_setpv(tmpcmd, "echo ");
2428 sv_catsv(tmpcmd, tmpglob);
2430 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2432 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2435 #endif /* !DOSISH */
2436 #endif /* MACOS_TRADITIONAL */
2437 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2438 FALSE, O_RDONLY, 0, Nullfp);
2447 * c-indentation-style: bsd
2449 * indent-tabs-mode: t
2452 * ex: set ts=8 sts=4 sw=4 noet: