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 = NULL;
69 PerlIO *saveofp = NULL;
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]; /* file mode ("r\0", "rb\0", "ab\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) = NULL;
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 */
192 type = savepvn(oname, len);
196 /* Lose leading and trailing white space */
197 while (isSPACE(*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);
239 } while (isSPACE(*type));
245 /* command is missing 19990114 */
246 if (ckWARN(WARN_PIPE))
247 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
251 if (!(*name == '-' && name[1] == '\0') || num_svs)
253 TAINT_PROPER("piped open");
254 if (!num_svs && name[len-1] == '|') {
256 if (ckWARN(WARN_PIPE))
257 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
263 strlcat(mode, "b", PERL_MODE_MAX - 1);
265 strlcat(mode, "t", PERL_MODE_MAX - 1);
273 fp = PerlProc_popen_list(mode, num_svs, svp);
276 fp = PerlProc_popen(name,mode);
280 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
286 else if (*type == IoTYPE_WRONLY) {
287 TAINT_PROPER("open");
289 if (*type == IoTYPE_WRONLY) {
290 /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
291 mode[0] = IoTYPE(io) = IoTYPE_APPEND;
301 strlcat(mode, "b", PERL_MODE_MAX - 1);
303 strlcat(mode, "t", PERL_MODE_MAX - 1);
312 dodup = PERLIO_DUP_FD;
318 if (!num_svs && !*type && supplied_fp) {
319 /* "<+&" etc. is used by typemaps */
323 PerlIO *that_fp = NULL;
325 Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
327 while (isSPACE(*type))
329 if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) {
333 else if (isDIGIT(*type)) {
339 thatio = sv_2io(*svp);
342 GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
344 thatio = GvIO(thatgv);
348 SETERRNO(EINVAL,SS_IVCHAN);
352 if ((that_fp = IoIFP(thatio))) {
353 /* Flush stdio buffer before dup. --mjd
354 * Unfortunately SEEK_CURing 0 seems to
355 * be optimized away on most platforms;
356 * only Solaris and Linux seem to flush
359 /* sfio fails to clear error on next
360 sfwrite, contrary to documentation.
362 if (PerlIO_seek(that_fp, 0, SEEK_CUR) == -1)
363 PerlIO_clearerr(that_fp);
365 /* On the other hand, do all platforms
366 * take gracefully to flushing a read-only
367 * filehandle? Perhaps we should do
368 * fsetpos(src)+fgetpos(dst)? --nik */
369 PerlIO_flush(that_fp);
370 fd = PerlIO_fileno(that_fp);
371 /* When dup()ing STDIN, STDOUT or STDERR
372 * explicitly set appropriate access mode */
373 if (that_fp == PerlIO_stdout()
374 || that_fp == PerlIO_stderr())
375 IoTYPE(io) = IoTYPE_WRONLY;
376 else if (that_fp == PerlIO_stdin())
377 IoTYPE(io) = IoTYPE_RDONLY;
378 /* When dup()ing a socket, say result is
380 else if (IoTYPE(thatio) == IoTYPE_SOCKET)
381 IoTYPE(io) = IoTYPE_SOCKET;
389 fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
393 fd = PerlLIO_dup(fd);
396 if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) {
397 if (dodup && fd >= 0)
404 while (isSPACE(*type))
406 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
408 fp = PerlIO_stdout();
409 IoTYPE(io) = IoTYPE_STD;
411 Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
416 namesv = sv_2mortal(newSVpvn(type,tend - type));
421 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
424 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
425 goto unknown_open_mode;
426 } /* IoTYPE_WRONLY */
427 else if (*type == IoTYPE_RDONLY) {
430 } while (isSPACE(*type));
434 strlcat(mode, "b", PERL_MODE_MAX - 1);
436 strlcat(mode, "t", PERL_MODE_MAX - 1);
446 if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
449 IoTYPE(io) = IoTYPE_STD;
451 Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
456 namesv = sv_2mortal(newSVpvn(type,tend - type));
461 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
463 if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
464 goto unknown_open_mode;
465 } /* IoTYPE_RDONLY */
466 else if ((num_svs && /* '-|...' or '...|' */
467 type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
468 (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
470 type += 2; /* skip over '-|' */
474 while (tend > type && isSPACE(tend[-1]))
476 for (; isSPACE(*type); type++)
482 /* command is missing 19990114 */
483 if (ckWARN(WARN_PIPE))
484 Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
488 if (!(*name == '-' && name[1] == '\0') || num_svs)
490 TAINT_PROPER("piped open");
495 strlcat(mode, "b", PERL_MODE_MAX - 1);
497 strlcat(mode, "t", PERL_MODE_MAX - 1);
506 fp = PerlProc_popen_list(mode,num_svs,svp);
509 fp = PerlProc_popen(name,mode);
511 IoTYPE(io) = IoTYPE_PIPE;
513 while (isSPACE(*type))
516 if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
522 else { /* layer(Args) */
524 goto unknown_open_mode;
526 IoTYPE(io) = IoTYPE_RDONLY;
527 for (; isSPACE(*name); name++)
533 strlcat(mode, "b", PERL_MODE_MAX - 1);
535 strlcat(mode, "t", PERL_MODE_MAX - 1);
543 if (*name == '-' && name[1] == '\0') {
545 IoTYPE(io) = IoTYPE_STD;
549 namesv = sv_2mortal(newSVpvn(type,tend - type));
554 fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
559 if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
560 && strchr(oname, '\n')
563 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
567 if (ckWARN(WARN_IO)) {
568 if ((IoTYPE(io) == IoTYPE_RDONLY) &&
569 (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
570 Perl_warner(aTHX_ packWARN(WARN_IO),
571 "Filehandle STD%s reopened as %s only for input",
572 ((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
575 else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
576 Perl_warner(aTHX_ packWARN(WARN_IO),
577 "Filehandle STDIN reopened as %s only for output",
582 fd = PerlIO_fileno(fp);
583 /* If there is no fd (e.g. PerlIO::scalar) assume it isn't a
584 * socket - this covers PerlIO::scalar - otherwise unless we "know" the
585 * type probe for socket-ness.
587 if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
588 if (PerlLIO_fstat(fd,&PL_statbuf) < 0) {
589 /* If PerlIO claims to have fd we had better be able to fstat() it. */
590 (void) PerlIO_close(fp);
594 if (S_ISSOCK(PL_statbuf.st_mode))
595 IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
599 !(PL_statbuf.st_mode & S_IFMT)
603 && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
604 && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
605 ) { /* on OS's that return 0 on fstat()ed pipe */
607 Sock_size_t buflen = sizeof tmpbuf;
608 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
609 || errno != ENOTSOCK)
610 IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
611 /* but some return 0 for streams too, sigh */
613 #endif /* HAS_SOCKET */
614 #endif /* !PERL_MICRO */
618 * If this is a standard handle we discard all the layer stuff
619 * and just dup the fd into whatever was on the handle before !
622 if (saveifp) { /* must use old fp? */
623 /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
624 then dup the new fileno down
627 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
628 if (saveofp != saveifp) { /* was a socket? */
629 PerlIO_close(saveofp);
633 /* Still a small can-of-worms here if (say) PerlIO::scalar
634 is assigned to (say) STDOUT - for now let dup2() fail
635 and provide the error
637 if (PerlLIO_dup2(fd, savefd) < 0) {
638 (void)PerlIO_close(fp);
642 if (savefd != PerlIO_fileno(PerlIO_stdin())) {
643 char newname[FILENAME_MAX+1];
644 if (PerlIO_getname(fp, newname)) {
645 if (fd == PerlIO_fileno(PerlIO_stdout()))
646 Perl_vmssetuserlnm(aTHX_ "SYS$OUTPUT", newname);
647 if (fd == PerlIO_fileno(PerlIO_stderr()))
648 Perl_vmssetuserlnm(aTHX_ "SYS$ERROR", newname);
654 /* PL_fdpid isn't used on Windows, so avoid this useless work.
655 * XXX Probably the same for a lot of other places. */
661 sv = *av_fetch(PL_fdpid,fd,TRUE);
662 SvUPGRADE(sv, SVt_IV);
665 sv = *av_fetch(PL_fdpid,savefd,TRUE);
666 SvUPGRADE(sv, SVt_IV);
673 /* need to close fp without closing underlying fd */
674 int ofd = PerlIO_fileno(fp);
675 int dupfd = PerlLIO_dup(ofd);
676 #if defined(HAS_FCNTL) && defined(F_SETFD)
677 /* Assume if we have F_SETFD we have F_GETFD */
678 int coe = fcntl(ofd,F_GETFD);
681 PerlLIO_dup2(dupfd,ofd);
682 #if defined(HAS_FCNTL) && defined(F_SETFD)
683 /* The dup trick has lost close-on-exec on ofd */
684 fcntl(ofd,F_SETFD, coe);
686 PerlLIO_close(dupfd);
693 fd = PerlIO_fileno(fp);
695 #if defined(HAS_FCNTL) && defined(F_SETFD)
697 const int save_errno = errno;
698 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
704 IoFLAGS(io) &= ~IOf_NOLINE;
706 if (IoTYPE(io) == IoTYPE_SOCKET
707 || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) {
709 if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
712 if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) {
726 IoTYPE(io) = savetype;
731 Perl_nextargv(pTHX_ register GV *gv)
735 #ifndef FLEXFILENAMES
741 IO * const io = GvIOp(gv);
744 PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
745 if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) {
746 IoFLAGS(io) &= ~IOf_START;
748 if (!PL_argvout_stack)
749 PL_argvout_stack = newAV();
751 av_push(PL_argvout_stack, SvREFCNT_inc_simple_NN(PL_defoutgv));
754 if (PL_filemode & (S_ISUID|S_ISGID)) {
755 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
758 (void)fchmod(PL_lastfd,PL_filemode);
760 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
767 while (av_len(GvAV(gv)) >= 0) {
769 sv = av_shift(GvAV(gv));
771 sv_setsv(GvSVn(gv),sv);
772 SvSETMAGIC(GvSV(gv));
773 PL_oldname = SvPVx(GvSV(gv), oldlen);
774 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,NULL)) {
776 TAINT_PROPER("inplace open");
777 if (oldlen == 1 && *PL_oldname == '-') {
778 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
780 return IoIFP(GvIOp(gv));
782 #ifndef FLEXFILENAMES
783 filedev = PL_statbuf.st_dev;
784 fileino = PL_statbuf.st_ino;
786 PL_filemode = PL_statbuf.st_mode;
787 fileuid = PL_statbuf.st_uid;
788 filegid = PL_statbuf.st_gid;
789 if (!S_ISREG(PL_filemode)) {
790 if (ckWARN_d(WARN_INPLACE))
791 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
792 "Can't do inplace edit: %s is not a regular file",
798 const char *star = strchr(PL_inplace, '*');
800 const char *begin = PL_inplace;
801 sv_setpvn(sv, "", 0);
803 sv_catpvn(sv, begin, star - begin);
804 sv_catpvn(sv, PL_oldname, oldlen);
806 } while ((star = strchr(begin, '*')));
811 sv_catpv(sv,PL_inplace);
813 #ifndef FLEXFILENAMES
814 if ((PerlLIO_stat(SvPVX_const(sv),&PL_statbuf) >= 0
815 && PL_statbuf.st_dev == filedev
816 && PL_statbuf.st_ino == fileino)
818 || ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
822 if (ckWARN_d(WARN_INPLACE))
823 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
824 "Can't do inplace edit: %"SVf" would not be unique",
831 #if !defined(DOSISH) && !defined(__CYGWIN__) && !defined(EPOC)
832 if (PerlLIO_rename(PL_oldname,SvPVX_const(sv)) < 0) {
833 if (ckWARN_d(WARN_INPLACE))
834 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
835 "Can't rename %s to %"SVf": %s, skipping file",
836 PL_oldname, (void*)sv, Strerror(errno));
842 (void)PerlLIO_unlink(SvPVX_const(sv));
843 (void)PerlLIO_rename(PL_oldname,SvPVX_const(sv));
844 do_open(gv,(char*)SvPVX_const(sv),SvCUR(sv),PL_inplace!=0,
848 (void)UNLINK(SvPVX_const(sv));
849 if (link(PL_oldname,SvPVX_const(sv)) < 0) {
850 if (ckWARN_d(WARN_INPLACE))
851 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
852 "Can't rename %s to %"SVf": %s, skipping file",
853 PL_oldname, sv, Strerror(errno) );
857 (void)UNLINK(PL_oldname);
861 #if !defined(DOSISH) && !defined(AMIGAOS)
862 # ifndef VMS /* Don't delete; use automatic file versioning */
863 if (UNLINK(PL_oldname) < 0) {
864 if (ckWARN_d(WARN_INPLACE))
865 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
866 "Can't remove %s: %s, skipping file",
867 PL_oldname, Strerror(errno) );
873 Perl_croak(aTHX_ "Can't do inplace edit without backup");
877 sv_setpvn(sv,">",!PL_inplace);
878 sv_catpvn(sv,PL_oldname,oldlen);
879 SETERRNO(0,0); /* in case sprintf set errno */
881 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
882 PL_inplace!=0,O_WRONLY|O_CREAT|O_TRUNC,0,NULL))
884 if (!do_open(PL_argvoutgv,(char*)SvPVX_const(sv),SvCUR(sv),
885 PL_inplace!=0,O_WRONLY|O_CREAT|OPEN_EXCL,0666,
889 if (ckWARN_d(WARN_INPLACE))
890 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: %s",
891 PL_oldname, Strerror(errno) );
895 setdefout(PL_argvoutgv);
896 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
897 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
899 (void)fchmod(PL_lastfd,PL_filemode);
901 # if !(defined(WIN32) && defined(__BORLANDC__))
902 /* Borland runtime creates a readonly file! */
903 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
906 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
908 (void)fchown(PL_lastfd,fileuid,filegid);
911 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
916 return IoIFP(GvIOp(gv));
919 if (ckWARN_d(WARN_INPLACE)) {
920 const int eno = errno;
921 if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0
922 && !S_ISREG(PL_statbuf.st_mode))
924 Perl_warner(aTHX_ packWARN(WARN_INPLACE),
925 "Can't do inplace edit: %s is not a regular file",
929 Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
930 PL_oldname, Strerror(eno));
934 if (io && (IoFLAGS(io) & IOf_ARGV))
935 IoFLAGS(io) |= IOf_START;
937 (void)do_close(PL_argvoutgv,FALSE);
938 if (io && (IoFLAGS(io) & IOf_ARGV)
939 && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
941 GV * const oldout = (GV*)av_pop(PL_argvout_stack);
943 SvREFCNT_dec(oldout);
946 setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
951 /* explicit renamed to avoid C++ conflict -- kja */
953 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
961 if (!gv || SvTYPE(gv) != SVt_PVGV) {
963 SETERRNO(EBADF,SS_IVCHAN);
967 if (!io) { /* never opened */
969 if (ckWARN(WARN_UNOPENED)) /* no check for closed here */
970 report_evil_fh(gv, io, PL_op->op_type);
971 SETERRNO(EBADF,SS_IVCHAN);
975 retval = io_close(io, not_implicit);
979 IoLINES_LEFT(io) = IoPAGE_LEN(io);
981 IoTYPE(io) = IoTYPE_CLOSED;
986 Perl_io_close(pTHX_ IO *io, bool not_implicit)
992 if (IoTYPE(io) == IoTYPE_PIPE) {
993 const int status = PerlProc_pclose(IoIFP(io));
995 STATUS_NATIVE_CHILD_SET(status);
996 retval = (STATUS_UNIX == 0);
999 retval = (status != -1);
1002 else if (IoTYPE(io) == IoTYPE_STD)
1005 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
1006 const bool prev_err = PerlIO_error(IoOFP(io));
1007 retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
1008 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
1011 const bool prev_err = PerlIO_error(IoIFP(io));
1012 retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
1015 IoOFP(io) = IoIFP(io) = NULL;
1017 else if (not_implicit) {
1018 SETERRNO(EBADF,SS_IVCHAN);
1025 Perl_do_eof(pTHX_ GV *gv)
1028 register IO * const io = GvIO(gv);
1032 else if ((IoTYPE(io) == IoTYPE_WRONLY) && ckWARN(WARN_IO))
1033 report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY);
1036 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
1037 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
1038 return FALSE; /* this is the most usual case */
1042 /* getc and ungetc can stomp on errno */
1043 const int saverrno = errno;
1044 const int ch = PerlIO_getc(IoIFP(io));
1046 (void)PerlIO_ungetc(IoIFP(io),ch);
1053 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
1054 if (PerlIO_get_cnt(IoIFP(io)) < -1)
1055 PerlIO_set_cnt(IoIFP(io),-1);
1057 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
1058 if (gv != PL_argvgv || !nextargv(gv)) /* get another fp handy */
1062 return TRUE; /* normal fp, definitely end of file */
1068 Perl_do_tell(pTHX_ GV *gv)
1071 register IO *io = NULL;
1072 register PerlIO *fp;
1074 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1075 #ifdef ULTRIX_STDIO_BOTCH
1077 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1079 return PerlIO_tell(fp);
1081 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1082 report_evil_fh(gv, io, PL_op->op_type);
1083 SETERRNO(EBADF,RMS_IFI);
1088 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
1091 register IO *io = NULL;
1092 register PerlIO *fp;
1094 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1095 #ifdef ULTRIX_STDIO_BOTCH
1097 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
1099 return PerlIO_seek(fp, pos, whence) >= 0;
1101 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1102 report_evil_fh(gv, io, PL_op->op_type);
1103 SETERRNO(EBADF,RMS_IFI);
1108 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
1111 register IO *io = NULL;
1112 register PerlIO *fp;
1114 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
1115 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
1116 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1117 report_evil_fh(gv, io, PL_op->op_type);
1118 SETERRNO(EBADF,RMS_IFI);
1123 Perl_mode_from_discipline(pTHX_ SV *discp)
1125 int mode = O_BINARY;
1128 const char *s = SvPV_const(discp,len);
1133 if (s[2] == 'a' && s[3] == 'w'
1134 && (!s[4] || s[4] == ':' || isSPACE(s[4])))
1143 if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
1144 && (!s[5] || s[5] == ':' || isSPACE(s[5])))
1153 goto fail_discipline;
1156 else if (isSPACE(*s)) {
1163 end = strchr(s+1, ':');
1166 #ifndef PERLIO_LAYERS
1167 Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
1178 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
1180 my_chsize(int fd, Off_t length)
1183 /* code courtesy of William Kucharski */
1188 if (PerlLIO_fstat(fd, &filebuf) < 0)
1191 if (filebuf.st_size < length) {
1193 /* extend file length */
1195 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
1198 /* write a "0" byte */
1200 if ((PerlLIO_write(fd, "", 1)) != 1)
1204 /* truncate length */
1208 fl.l_start = length;
1209 fl.l_type = F_WRLCK; /* write lock on file space */
1212 * This relies on the UNDOCUMENTED F_FREESP argument to
1213 * fcntl(2), which truncates the file so that it ends at the
1214 * position indicated by fl.l_start.
1216 * Will minor miracles never cease?
1219 if (fcntl(fd, F_FREESP, &fl) < 0)
1225 Perl_croak_nocontext("truncate not implemented");
1226 #endif /* F_FREESP */
1229 #endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
1232 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
1235 register const char *tmps;
1240 /* assuming fp is checked earlier */
1243 switch (SvTYPE(sv)) {
1245 if (ckWARN(WARN_UNINITIALIZED))
1250 assert(!SvGMAGICAL(sv));
1252 PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv));
1254 PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv));
1255 return !PerlIO_error(fp);
1259 /* Do this first to trigger any overloading. */
1260 tmps = SvPV_const(sv, len);
1261 if (PerlIO_isutf8(fp)) {
1263 /* We don't modify the original scalar. */
1264 tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
1265 tmps = (char *) tmpbuf;
1268 else if (DO_UTF8(sv)) {
1269 STRLEN tmplen = len;
1271 U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
1274 tmps = (char *) tmpbuf;
1278 assert((char *)result == tmps);
1279 if (ckWARN_d(WARN_UTF8)) {
1280 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1281 "Wide character in print");
1287 /* To detect whether the process is about to overstep its
1288 * filesize limit we would need getrlimit(). We could then
1289 * also transparently raise the limit with setrlimit() --
1290 * but only until the system hard limit/the filesystem limit,
1291 * at which we would get EPERM. Note that when using buffered
1292 * io the write failure can be delayed until the flush/close. --jhi */
1293 if (len && (PerlIO_write(fp,tmps,len) == 0))
1296 return happy ? !PerlIO_error(fp) : FALSE;
1307 if (PL_op->op_flags & OPf_REF) {
1312 return PL_laststatval;
1314 PL_laststype = OP_STAT;
1316 sv_setpvn(PL_statname, "", 0);
1319 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1320 } else if (IoDIRP(io)) {
1322 return (PL_laststatval = PerlLIO_fstat(dirfd(IoDIRP(io)), &PL_statcache));
1324 Perl_die(aTHX_ PL_no_func, "dirfd");
1327 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1328 report_evil_fh(gv, io, PL_op->op_type);
1329 return (PL_laststatval = -1);
1332 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1333 report_evil_fh(gv, io, PL_op->op_type);
1334 return (PL_laststatval = -1);
1337 else if (PL_op->op_private & OPpFT_STACKED) {
1338 return PL_laststatval;
1341 SV* const sv = POPs;
1345 if (SvTYPE(sv) == SVt_PVGV) {
1349 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1354 s = SvPV_const(sv, len);
1356 sv_setpvn(PL_statname, s, len);
1357 s = SvPVX_const(PL_statname); /* s now NUL-terminated */
1358 PL_laststype = OP_STAT;
1359 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1360 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1361 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
1362 return PL_laststatval;
1371 static const char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat";
1374 if (PL_op->op_flags & OPf_REF) {
1376 if (cGVOP_gv == PL_defgv) {
1377 if (PL_laststype != OP_LSTAT)
1378 Perl_croak(aTHX_ no_prev_lstat);
1379 return PL_laststatval;
1381 if (ckWARN(WARN_IO)) {
1382 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1384 return (PL_laststatval = -1);
1387 else if (PL_laststype != OP_LSTAT
1388 && (PL_op->op_private & OPpFT_STACKED) && ckWARN(WARN_IO))
1389 Perl_croak(aTHX_ no_prev_lstat);
1391 PL_laststype = OP_LSTAT;
1395 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV && ckWARN(WARN_IO)) {
1396 Perl_warner(aTHX_ packWARN(WARN_IO), "Use of -l on filehandle %s",
1397 GvENAME((GV*) SvRV(sv)));
1398 return (PL_laststatval = -1);
1400 /* XXX Do really need to be calling SvPV() all these times? */
1401 sv_setpv(PL_statname,SvPV_nolen_const(sv));
1402 PL_laststatval = PerlLIO_lstat(SvPV_nolen_const(sv),&PL_statcache);
1403 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV_nolen_const(sv), '\n'))
1404 Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
1405 return PL_laststatval;
1409 S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
1411 const int e = errno;
1412 if (ckWARN(WARN_EXEC))
1413 Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
1416 PerlLIO_write(fd, (void*)&e, sizeof(int));
1422 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1423 int fd, int do_report)
1426 #if defined(MACOS_TRADITIONAL) || defined(__SYMBIAN32__)
1427 Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
1431 const char *tmps = NULL;
1432 Newx(PL_Argv, sp - mark + 1, char*);
1435 while (++mark <= sp) {
1437 *a++ = (char*)SvPV_nolen_const(*mark);
1443 tmps = SvPV_nolen_const(really);
1444 if ((!really && *PL_Argv[0] != '/') ||
1445 (really && *tmps != '/')) /* will execvp use PATH? */
1446 TAINT_ENV(); /* testing IFS here is overkill, probably */
1448 if (really && *tmps)
1449 PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv));
1451 PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv));
1453 S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report);
1461 Perl_do_execfree(pTHX)
1470 #ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
1473 Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
1480 /* Make a copy so we can change it */
1481 const int cmdlen = strlen(incmd);
1482 Newx(cmd, cmdlen+1, char);
1483 strncpy(cmd, incmd, cmdlen);
1486 while (*cmd && isSPACE(*cmd))
1489 /* save an extra exec if possible */
1493 char flags[PERL_FLAGS_MAX];
1494 if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
1495 strnEQ(cmd+PL_cshlen," -c",3)) {
1497 strlcpy(flags, "-c", PERL_FLAGS_MAX);
1501 s = cmd+PL_cshlen+3;
1505 strlcat(flags, "f", PERL_FLAGS_MAX - 2);
1513 char * const ncmd = s;
1519 if (s[-1] == '\'') {
1522 PerlProc_execl(PL_cshname, "csh", flags, ncmd, NULL);
1525 S_exec_failed(aTHX_ PL_cshname, fd, do_report);
1534 /* see if there are shell metacharacters in it */
1536 if (*cmd == '.' && isSPACE(cmd[1]))
1539 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1544 s++; /* catch VAR=val gizmo */
1548 for (s = cmd; *s; s++) {
1549 if (*s != ' ' && !isALPHA(*s) &&
1550 strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1551 if (*s == '\n' && !s[1]) {
1555 /* handle the 2>&1 construct at the end */
1556 if (*s == '>' && s[1] == '&' && s[2] == '1'
1557 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1558 && (!s[3] || isSPACE(s[3])))
1560 const char *t = s + 3;
1562 while (*t && isSPACE(*t))
1564 if (!*t && (PerlLIO_dup2(1,2) != -1)) {
1571 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, NULL);
1573 S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
1579 Newx(PL_Argv, (s - cmd) / 2 + 2, char*);
1580 PL_Cmd = savepvn(cmd, s-cmd);
1582 for (s = PL_Cmd; *s;) {
1587 while (*s && !isSPACE(*s))
1595 PerlProc_execvp(PL_Argv[0],PL_Argv);
1597 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1601 S_exec_failed(aTHX_ PL_Argv[0], fd, do_report);
1608 #endif /* OS2 || WIN32 */
1611 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1615 register I32 tot = 0;
1616 const char *const what = PL_op_name[type];
1618 SV ** const oldmark = mark;
1620 /* Doing this ahead of the switch statement preserves the old behaviour,
1621 where attempting to use kill as a taint test test would fail on
1622 platforms where kill was not defined. */
1624 if (type == OP_KILL)
1625 Perl_die(aTHX_ PL_no_func, what);
1628 if (type == OP_CHOWN)
1629 Perl_die(aTHX_ PL_no_func, what);
1633 #define APPLY_TAINT_PROPER() \
1635 if (PL_tainted) { TAINT_PROPER(what); } \
1638 /* This is a first heuristic; it doesn't catch tainting magic. */
1640 while (++mark <= sp) {
1641 if (SvTAINTED(*mark)) {
1650 APPLY_TAINT_PROPER();
1653 APPLY_TAINT_PROPER();
1655 while (++mark <= sp) {
1657 if (SvTYPE(*mark) == SVt_PVGV) {
1660 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1662 APPLY_TAINT_PROPER();
1663 if (fchmod(PerlIO_fileno(IoIFP(GvIOn(gv))), val))
1666 Perl_die(aTHX_ PL_no_func, "fchmod");
1673 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1674 gv = (GV*)SvRV(*mark);
1678 const char *name = SvPV_nolen_const(*mark);
1679 APPLY_TAINT_PROPER();
1680 if (PerlLIO_chmod(name, val))
1688 APPLY_TAINT_PROPER();
1689 if (sp - mark > 2) {
1691 val = SvIVx(*++mark);
1692 val2 = SvIVx(*++mark);
1693 APPLY_TAINT_PROPER();
1695 while (++mark <= sp) {
1697 if (SvTYPE(*mark) == SVt_PVGV) {
1700 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1702 APPLY_TAINT_PROPER();
1703 if (fchown(PerlIO_fileno(IoIFP(GvIOn(gv))), val, val2))
1706 Perl_die(aTHX_ PL_no_func, "fchown");
1713 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1714 gv = (GV*)SvRV(*mark);
1718 const char *name = SvPV_nolen_const(*mark);
1719 APPLY_TAINT_PROPER();
1720 if (PerlLIO_chown(name, val, val2))
1728 XXX Should we make lchown() directly available from perl?
1729 For now, we'll let Configure test for HAS_LCHOWN, but do
1730 nothing in the core.
1735 APPLY_TAINT_PROPER();
1738 s = SvPVx_nolen_const(*++mark);
1740 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1742 if ((val = whichsig(s)) < 0)
1743 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1747 APPLY_TAINT_PROPER();
1750 /* kill() doesn't do process groups (job trees?) under VMS */
1751 if (val < 0) val = -val;
1752 if (val == SIGKILL) {
1753 # include <starlet.h>
1754 /* Use native sys$delprc() to insure that target process is
1755 * deleted; supervisor-mode images don't pay attention to
1756 * CRTL's emulation of Unix-style signals and kill()
1758 while (++mark <= sp) {
1759 I32 proc = SvIVx(*mark);
1760 register unsigned long int __vmssts;
1761 APPLY_TAINT_PROPER();
1762 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1766 case SS$_NOSUCHNODE:
1767 SETERRNO(ESRCH,__vmssts);
1770 SETERRNO(EPERM,__vmssts);
1773 SETERRNO(EVMSERR,__vmssts);
1782 while (++mark <= sp) {
1783 const I32 proc = SvIVx(*mark);
1784 APPLY_TAINT_PROPER();
1786 if (PerlProc_killpg(proc,val)) /* BSD */
1788 if (PerlProc_kill(-proc,val)) /* SYSV */
1794 while (++mark <= sp) {
1795 const I32 proc = SvIVx(*mark);
1796 APPLY_TAINT_PROPER();
1797 if (PerlProc_kill(proc, val))
1804 APPLY_TAINT_PROPER();
1806 while (++mark <= sp) {
1807 s = SvPV_nolen_const(*mark);
1808 APPLY_TAINT_PROPER();
1809 if (PL_euid || PL_unsafe) {
1813 else { /* don't let root wipe out directories without -U */
1814 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1823 #if defined(HAS_UTIME) || defined(HAS_FUTIMES)
1825 APPLY_TAINT_PROPER();
1826 if (sp - mark > 2) {
1827 #if defined(HAS_FUTIMES)
1828 struct timeval utbuf[2];
1829 void *utbufp = utbuf;
1830 #elif defined(I_UTIME) || defined(VMS)
1831 struct utimbuf utbuf;
1832 struct utimbuf *utbufp = &utbuf;
1838 void *utbufp = &utbuf;
1841 SV* const accessed = *++mark;
1842 SV* const modified = *++mark;
1844 /* Be like C, and if both times are undefined, let the C
1845 * library figure out what to do. This usually means
1846 * "current time". */
1848 if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
1851 Zero(&utbuf, sizeof utbuf, char);
1853 utbuf[0].tv_sec = (long)SvIVx(accessed); /* time accessed */
1854 utbuf[0].tv_usec = 0;
1855 utbuf[1].tv_sec = (long)SvIVx(modified); /* time modified */
1856 utbuf[1].tv_usec = 0;
1857 #elif defined(BIG_TIME)
1858 utbuf.actime = (Time_t)SvNVx(accessed); /* time accessed */
1859 utbuf.modtime = (Time_t)SvNVx(modified); /* time modified */
1861 utbuf.actime = (Time_t)SvIVx(accessed); /* time accessed */
1862 utbuf.modtime = (Time_t)SvIVx(modified); /* time modified */
1865 APPLY_TAINT_PROPER();
1867 while (++mark <= sp) {
1869 if (SvTYPE(*mark) == SVt_PVGV) {
1872 if (GvIO(gv) && IoIFP(GvIOp(gv))) {
1874 APPLY_TAINT_PROPER();
1875 if (futimes(PerlIO_fileno(IoIFP(GvIOn(gv))), utbufp))
1878 Perl_die(aTHX_ PL_no_func, "futimes");
1885 else if (SvROK(*mark) && SvTYPE(SvRV(*mark)) == SVt_PVGV) {
1886 gv = (GV*)SvRV(*mark);
1890 const char * const name = SvPV_nolen_const(*mark);
1891 APPLY_TAINT_PROPER();
1893 if (utimes(name, utbufp))
1895 if (PerlLIO_utime(name, utbufp))
1909 #undef APPLY_TAINT_PROPER
1912 /* Do the permissions allow some operation? Assumes statcache already set. */
1913 #ifndef VMS /* VMS' cando is in vms.c */
1915 Perl_cando(pTHX_ Mode_t mode, bool effective, register const Stat_t *statbufp)
1916 /* effective is a flag, true for EUID, or for checking if the effective gid
1917 * is in the list of groups returned from getgroups().
1922 /* [Comments and code from Len Reed]
1923 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1924 * to write-protected files. The execute permission bit is set
1925 * by the Miscrosoft C library stat() function for the following:
1930 * All files and directories are readable.
1931 * Directories and special files, e.g. "CON", cannot be
1933 * [Comment by Tom Dinger -- a directory can have the write-protect
1934 * bit set in the file system, but DOS permits changes to
1935 * the directory anyway. In addition, all bets are off
1936 * here for networked software, such as Novell and
1940 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1941 * too so it will actually look into the files for magic numbers
1943 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1945 #else /* ! DOSISH */
1946 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1947 if (mode == S_IXUSR) {
1948 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1952 return TRUE; /* root reads and writes anything */
1955 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1956 if (statbufp->st_mode & mode)
1957 return TRUE; /* ok as "user" */
1959 else if (ingroup(statbufp->st_gid,effective)) {
1960 if (statbufp->st_mode & mode >> 3)
1961 return TRUE; /* ok as "group" */
1963 else if (statbufp->st_mode & mode >> 6)
1964 return TRUE; /* ok as "other" */
1966 #endif /* ! DOSISH */
1971 Perl_ingroup(pTHX_ Gid_t testgid, bool effective)
1973 #ifdef MACOS_TRADITIONAL
1974 /* This is simply not correct for AppleShare, but fix it yerself. */
1978 if (testgid == (effective ? PL_egid : PL_gid))
1980 #ifdef HAS_GETGROUPS
1982 Groups_t *gary = NULL;
1986 anum = getgroups(0, gary);
1987 Newx(gary, anum, Groups_t);
1988 anum = getgroups(anum, gary);
1990 if (gary[anum] == testgid) {
2004 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
2007 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
2010 const key_t key = (key_t)SvNVx(*++mark);
2011 const I32 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
2012 const I32 flags = SvIVx(*++mark);
2014 PERL_UNUSED_ARG(sp);
2021 return msgget(key, flags);
2025 return semget(key, n, flags);
2029 return shmget(key, n, flags);
2031 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2033 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2036 return -1; /* should never happen */
2040 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
2045 const I32 id = SvIVx(*++mark);
2047 const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
2049 const I32 cmd = SvIVx(*++mark);
2050 SV * const astr = *++mark;
2051 STRLEN infosize = 0;
2052 I32 getinfo = (cmd == IPC_STAT);
2054 PERL_UNUSED_ARG(sp);
2060 if (cmd == IPC_STAT || cmd == IPC_SET)
2061 infosize = sizeof(struct msqid_ds);
2066 if (cmd == IPC_STAT || cmd == IPC_SET)
2067 infosize = sizeof(struct shmid_ds);
2073 if (cmd == IPC_STAT || cmd == IPC_SET)
2074 infosize = sizeof(struct semid_ds);
2075 else if (cmd == GETALL || cmd == SETALL)
2077 struct semid_ds semds;
2079 #ifdef EXTRA_F_IN_SEMUN_BUF
2080 semun.buff = &semds;
2084 getinfo = (cmd == GETALL);
2085 if (Semctl(id, 0, IPC_STAT, semun) == -1)
2087 infosize = semds.sem_nsems * sizeof(short);
2088 /* "short" is technically wrong but much more portable
2089 than guessing about u_?short(_t)? */
2092 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2096 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2098 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2106 SvPV_force_nolen(astr);
2107 a = SvGROW(astr, infosize+1);
2112 a = SvPV(astr, len);
2113 if (len != infosize)
2114 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
2122 const IV i = SvIV(astr);
2123 a = INT2PTR(char *,i); /* ouch */
2130 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2136 union semun unsemds;
2138 #ifdef EXTRA_F_IN_SEMUN_BUF
2139 unsemds.buff = (struct semid_ds *)a;
2141 unsemds.buf = (struct semid_ds *)a;
2143 ret = Semctl(id, n, cmd, unsemds);
2145 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
2152 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2156 if (getinfo && ret >= 0) {
2157 SvCUR_set(astr, infosize);
2158 *SvEND(astr) = '\0';
2165 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
2170 const I32 id = SvIVx(*++mark);
2171 SV * const mstr = *++mark;
2172 const I32 flags = SvIVx(*++mark);
2173 const char * const mbuf = SvPV_const(mstr, len);
2174 const I32 msize = len - sizeof(long);
2176 PERL_UNUSED_ARG(sp);
2179 Perl_croak(aTHX_ "Arg too short for msgsnd");
2181 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2183 Perl_croak(aTHX_ "msgsnd not implemented");
2188 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
2194 I32 msize, flags, ret;
2195 const I32 id = SvIVx(*++mark);
2196 SV * const mstr = *++mark;
2197 PERL_UNUSED_ARG(sp);
2199 /* suppress warning when reading into undef var --jhi */
2201 sv_setpvn(mstr, "", 0);
2202 msize = SvIVx(*++mark);
2203 mtype = (long)SvIVx(*++mark);
2204 flags = SvIVx(*++mark);
2205 SvPV_force_nolen(mstr);
2206 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
2209 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2211 SvCUR_set(mstr, sizeof(long)+ret);
2212 *SvEND(mstr) = '\0';
2213 #ifndef INCOMPLETE_TAINTS
2214 /* who knows who has been playing with this message? */
2220 Perl_croak(aTHX_ "msgrcv not implemented");
2225 Perl_do_semop(pTHX_ SV **mark, SV **sp)
2230 const I32 id = SvIVx(*++mark);
2231 SV * const opstr = *++mark;
2232 const char * const opbuf = SvPV_const(opstr, opsize);
2233 PERL_UNUSED_ARG(sp);
2235 if (opsize < 3 * SHORTSIZE
2236 || (opsize % (3 * SHORTSIZE))) {
2237 SETERRNO(EINVAL,LIB_INVARG);
2241 /* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
2243 const int nsops = opsize / (3 * sizeof (short));
2245 short * const ops = (short *) opbuf;
2247 struct sembuf *temps, *t;
2250 Newx (temps, nsops, struct sembuf);
2258 result = semop(id, temps, nsops);
2272 Perl_croak(aTHX_ "semop not implemented");
2277 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
2282 struct shmid_ds shmds;
2283 const I32 id = SvIVx(*++mark);
2284 SV * const mstr = *++mark;
2285 const I32 mpos = SvIVx(*++mark);
2286 const I32 msize = SvIVx(*++mark);
2287 PERL_UNUSED_ARG(sp);
2290 if (shmctl(id, IPC_STAT, &shmds) == -1)
2292 if (mpos < 0 || msize < 0 || (size_t)mpos + msize > shmds.shm_segsz) {
2293 SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
2296 shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
2297 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2299 if (optype == OP_SHMREAD) {
2301 /* suppress warning when reading into undef var (tchrist 3/Mar/00) */
2303 sv_setpvn(mstr, "", 0);
2304 SvPV_force_nolen(mstr);
2305 mbuf = SvGROW(mstr, (STRLEN)msize+1);
2307 Copy(shm + mpos, mbuf, msize, char);
2308 SvCUR_set(mstr, msize);
2309 *SvEND(mstr) = '\0';
2311 #ifndef INCOMPLETE_TAINTS
2312 /* who knows who has been playing with this shared memory? */
2319 const char *mbuf = SvPV_const(mstr, len);
2320 const I32 n = ((I32)len > msize) ? msize : (I32)len;
2321 Copy(mbuf, shm + mpos, n, char);
2323 memzero(shm + mpos + n, msize - n);
2327 Perl_croak(aTHX_ "shm I/O not implemented");
2331 #endif /* SYSV IPC */
2336 =for apidoc start_glob
2338 Function called by C<do_readline> to spawn a glob (or do the glob inside
2339 perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
2340 this glob starter is only used by miniperl during the build process.
2341 Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up.
2347 Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
2350 SV * const tmpcmd = newSV(0);
2354 #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
2355 /* since spawning off a process is a real performance hit */
2362 fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
2365 #ifdef MACOS_TRADITIONAL
2366 sv_setpv(tmpcmd, "glob ");
2367 sv_catsv(tmpcmd, tmpglob);
2368 sv_catpv(tmpcmd, " |");
2372 sv_setpv(tmpcmd, "for a in ");
2373 sv_catsv(tmpcmd, tmpglob);
2374 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
2377 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
2378 sv_catsv(tmpcmd, tmpglob);
2380 sv_setpv(tmpcmd, "perlglob ");
2381 sv_catsv(tmpcmd, tmpglob);
2382 sv_catpv(tmpcmd, " |");
2387 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
2388 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
2389 sv_catsv(tmpcmd, tmpglob);
2390 sv_catpv(tmpcmd, "' 2>/dev/null |");
2392 sv_setpv(tmpcmd, "echo ");
2393 sv_catsv(tmpcmd, tmpglob);
2395 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
2397 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
2400 #endif /* !DOSISH */
2401 #endif /* MACOS_TRADITIONAL */
2402 (void)do_open(PL_last_in_gv, (char*)SvPVX_const(tmpcmd), SvCUR(tmpcmd),
2403 FALSE, O_RDONLY, 0, NULL);
2412 * c-indentation-style: bsd
2414 * indent-tabs-mode: t
2417 * ex: set ts=8 sts=4 sw=4 noet: