3 * Copyright (c) 1991-1999, 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>
51 # define OPEN_EXCL O_EXCL
56 #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
60 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
65 #if defined(HAS_SOCKET) && !defined(VMS) /* VMS handles sockets via vmsish.h */
66 # include <sys/socket.h>
67 # if defined(USE_SOCKS) && defined(I_SOCKS)
75 # include <net/errno.h>
80 /* Put this after #includes because <unistd.h> defines _XOPEN_*. */
82 # if _XOPEN_VERSION >= 5 || defined(_XOPEN_SOURCE_EXTENDED) || defined(__GLIBC__)
83 # define Sock_size_t Size_t
85 # define Sock_size_t int
90 Perl_do_open(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
91 int rawmode, int rawperm, PerlIO *supplied_fp)
93 return do_open9(gv, name, len, as_raw, rawmode, rawperm,
94 supplied_fp, Nullsv, 0);
98 Perl_do_open9(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
99 int rawmode, int rawperm, PerlIO *supplied_fp, SV *svs,
102 register IO *io = GvIOn(gv);
103 PerlIO *saveifp = Nullfp;
104 PerlIO *saveofp = Nullfp;
110 bool was_fdopen = FALSE;
112 PL_forkprocess = 1; /* assume true if no fork */
115 fd = PerlIO_fileno(IoIFP(io));
116 if (IoTYPE(io) == '-')
118 else if (fd <= PL_maxsysfd) {
121 savetype = IoTYPE(io);
124 else if (IoTYPE(io) == '|')
125 result = PerlProc_pclose(IoIFP(io));
126 else if (IoIFP(io) != IoOFP(io)) {
128 result = PerlIO_close(IoOFP(io));
129 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
132 result = PerlIO_close(IoIFP(io));
135 result = PerlIO_close(IoIFP(io));
136 if (result == EOF && fd > PL_maxsysfd)
137 PerlIO_printf(PerlIO_stderr(),
138 "Warning: unable to close filehandle %s properly.\n",
140 IoOFP(io) = IoIFP(io) = Nullfp;
144 #if defined(USE_64_BIT_OFFSETS) && defined(O_LARGEFILE)
145 rawmode |= O_LARGEFILE;
149 #define O_ACCMODE 3 /* Assume traditional implementation */
152 switch (result = rawmode & O_ACCMODE) {
165 writing = (result > 0);
166 fd = PerlLIO_open3(name, rawmode, rawperm);
172 if (result == O_RDONLY)
175 else if (rawmode & O_APPEND)
176 fpmode = (result == O_WRONLY) ? "a" : "a+";
179 fpmode = (result == O_WRONLY) ? "w" : "r+";
180 fp = PerlIO_fdopen(fd, fpmode);
191 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
196 name = SvPV(svs, tlen) ;
201 myname = savepvn(name, len);
205 while (tlen && isSPACE(type[tlen-1]))
208 mode[0] = mode[1] = mode[2] = '\0';
210 if (*type == '+' && tlen > 1 && type[tlen-1] != '|') { /* scary */
217 if (num_svs && (tlen != 2 || type[1] != '-')) {
219 Perl_croak(aTHX_ "Unknown open() mode '%.*s'", otlen, otype);
222 for (type++; isSPACE(*type); type++) ;
225 if (*name == '\0') { /* command is missing 19990114 */
227 if (ckWARN(WARN_PIPE))
228 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
232 if (strNE(name,"-") || num_svs)
234 TAINT_PROPER("piped open");
235 if (name[strlen(name)-1] == '|') {
237 name[strlen(name)-1] = '\0' ;
238 if (ckWARN(WARN_PIPE))
239 Perl_warner(aTHX_ WARN_PIPE, "Can't do bidirectional pipe");
241 fp = PerlProc_popen(name,"w");
244 else if (*type == '>') {
245 TAINT_PROPER("open");
248 mode[0] = IoTYPE(io) = 'a';
256 if (num_svs && tlen != 1)
267 if (!*name && supplied_fp)
271 for (; isSPACE(*name); name++) ;
276 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
280 SETERRNO(EINVAL,SS$_IVCHAN);
285 PerlIO *fp = IoIFP(thatio);
286 /* Flush stdio buffer before dup */
287 PerlIO_seek(fp, 0, SEEK_CUR);
288 fd = PerlIO_fileno(fp);
289 if (IoTYPE(thatio) == 's')
296 fd = PerlLIO_dup(fd);
299 if (!(fp = PerlIO_fdopen(fd,mode))) {
307 for (; isSPACE(*type); type++) ;
308 if (strEQ(type,"-")) {
309 fp = PerlIO_stdout();
313 fp = PerlIO_open((num_svs ? name : type), mode);
317 else if (*type == '<') {
318 if (num_svs && tlen != 1)
321 for (type++; isSPACE(*type); type++) ;
327 if (strEQ(type,"-")) {
332 fp = PerlIO_open((num_svs ? name : type), mode);
334 else if (tlen > 1 && type[tlen-1] == '|') {
336 if (tlen != 2 || type[0] != '-')
341 while (tlen && isSPACE(type[tlen-1]))
344 for (; isSPACE(*type); type++) ;
347 if (*name == '\0') { /* command is missing 19990114 */
349 if (ckWARN(WARN_PIPE))
350 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
354 if (strNE(name,"-") || num_svs)
356 TAINT_PROPER("piped open");
357 fp = PerlProc_popen(name,"r");
366 for (; isSPACE(*name); name++) ;
367 if (strEQ(name,"-")) {
372 fp = PerlIO_open(name,"r");
377 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == '<' && strchr(name, '\n'))
378 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
382 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
384 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
385 (void)PerlIO_close(fp);
388 if (S_ISSOCK(PL_statbuf.st_mode))
389 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
393 !(PL_statbuf.st_mode & S_IFMT)
399 Sock_size_t buflen = sizeof tmpbuf;
400 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
402 || errno != ENOTSOCK)
403 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
404 /* but some return 0 for streams too, sigh */
408 if (saveifp) { /* must use old fp? */
409 fd = PerlIO_fileno(saveifp);
411 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
412 if (saveofp != saveifp) { /* was a socket? */
413 PerlIO_close(saveofp);
418 if (fd != PerlIO_fileno(fp)) {
422 PerlLIO_dup2(PerlIO_fileno(fp), fd);
423 sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
424 (void)SvUPGRADE(sv, SVt_IV);
427 sv = *av_fetch(PL_fdpid,fd,TRUE);
428 (void)SvUPGRADE(sv, SVt_IV);
437 #if defined(HAS_FCNTL) && defined(F_SETFD)
439 int save_errno = errno;
440 fd = PerlIO_fileno(fp);
441 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
448 if (IoTYPE(io) == 's'
449 || (IoTYPE(io) == '>' && S_ISCHR(PL_statbuf.st_mode)) ) {
450 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
464 IoTYPE(io) = savetype;
469 Perl_nextargv(pTHX_ register GV *gv)
472 #ifndef FLEXFILENAMES
480 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
481 if (PL_filemode & (S_ISUID|S_ISGID)) {
482 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
484 (void)fchmod(PL_lastfd,PL_filemode);
486 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
490 while (av_len(GvAV(gv)) >= 0) {
493 sv = av_shift(GvAV(gv));
495 sv_setsv(GvSV(gv),sv);
496 SvSETMAGIC(GvSV(gv));
497 PL_oldname = SvPVx(GvSV(gv), oldlen);
498 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
500 TAINT_PROPER("inplace open");
501 if (oldlen == 1 && *PL_oldname == '-') {
502 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
503 return IoIFP(GvIOp(gv));
505 #ifndef FLEXFILENAMES
506 filedev = PL_statbuf.st_dev;
507 fileino = PL_statbuf.st_ino;
509 PL_filemode = PL_statbuf.st_mode;
510 fileuid = PL_statbuf.st_uid;
511 filegid = PL_statbuf.st_gid;
512 if (!S_ISREG(PL_filemode)) {
513 if (ckWARN_d(WARN_INPLACE))
514 Perl_warner(aTHX_ WARN_INPLACE,
515 "Can't do inplace edit: %s is not a regular file",
521 char *star = strchr(PL_inplace, '*');
523 char *begin = PL_inplace;
524 sv_setpvn(sv, "", 0);
526 sv_catpvn(sv, begin, star - begin);
527 sv_catpvn(sv, PL_oldname, oldlen);
529 } while ((star = strchr(begin, '*')));
534 sv_catpv(sv,PL_inplace);
536 #ifndef FLEXFILENAMES
537 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
538 && PL_statbuf.st_dev == filedev
539 && PL_statbuf.st_ino == fileino
541 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
545 if (ckWARN_d(WARN_INPLACE))
546 Perl_warner(aTHX_ WARN_INPLACE,
547 "Can't do inplace edit: %s would not be unique",
554 #if !defined(DOSISH) && !defined(CYGWIN)
555 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
556 if (ckWARN_d(WARN_INPLACE))
557 Perl_warner(aTHX_ WARN_INPLACE,
558 "Can't rename %s to %s: %s, skipping file",
559 PL_oldname, SvPVX(sv), Strerror(errno) );
565 (void)PerlLIO_unlink(SvPVX(sv));
566 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
567 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
570 (void)UNLINK(SvPVX(sv));
571 if (link(PL_oldname,SvPVX(sv)) < 0) {
572 if (ckWARN_d(WARN_INPLACE))
573 Perl_warner(aTHX_ WARN_INPLACE,
574 "Can't rename %s to %s: %s, skipping file",
575 PL_oldname, SvPVX(sv), Strerror(errno) );
579 (void)UNLINK(PL_oldname);
583 #if !defined(DOSISH) && !defined(AMIGAOS)
584 # ifndef VMS /* Don't delete; use automatic file versioning */
585 if (UNLINK(PL_oldname) < 0) {
586 if (ckWARN_d(WARN_INPLACE))
587 Perl_warner(aTHX_ WARN_INPLACE,
588 "Can't remove %s: %s, skipping file",
589 PL_oldname, Strerror(errno) );
595 Perl_croak(aTHX_ "Can't do inplace edit without backup");
599 sv_setpvn(sv,">",!PL_inplace);
600 sv_catpvn(sv,PL_oldname,oldlen);
601 SETERRNO(0,0); /* in case sprintf set errno */
603 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
604 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp)) {
606 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
607 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) {
609 if (ckWARN_d(WARN_INPLACE))
610 Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit on %s: %s",
611 PL_oldname, Strerror(errno) );
615 setdefout(PL_argvoutgv);
616 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
617 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
619 (void)fchmod(PL_lastfd,PL_filemode);
621 # if !(defined(WIN32) && defined(__BORLANDC__))
622 /* Borland runtime creates a readonly file! */
623 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
626 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
628 (void)fchown(PL_lastfd,fileuid,filegid);
631 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
636 return IoIFP(GvIOp(gv));
640 if (ckWARN_d(WARN_INPLACE)) {
641 if (!S_ISREG(PL_statbuf.st_mode))
642 Perl_warner(aTHX_ WARN_INPLACE,
643 "Can't do inplace edit: %s is not a regular file",
646 Perl_warner(aTHX_ WARN_INPLACE, "Can't open %s: %s\n",
647 PL_oldname, Strerror(errno));
652 (void)do_close(PL_argvoutgv,FALSE);
653 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
660 Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
679 if (PerlProc_pipe(fd) < 0)
681 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
682 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
683 IoIFP(wstio) = IoOFP(wstio);
686 if (!IoIFP(rstio) || !IoOFP(wstio)) {
687 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
688 else PerlLIO_close(fd[0]);
689 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
690 else PerlLIO_close(fd[1]);
694 sv_setsv(sv,&PL_sv_yes);
698 sv_setsv(sv,&PL_sv_undef);
703 /* explicit renamed to avoid C++ conflict -- kja */
705 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
712 if (!gv || SvTYPE(gv) != SVt_PVGV) {
714 SETERRNO(EBADF,SS$_IVCHAN);
718 if (!io) { /* never opened */
721 if (ckWARN(WARN_UNOPENED))
722 Perl_warner(aTHX_ WARN_UNOPENED,
723 "Close on unopened file <%s>",GvENAME(gv));
724 SETERRNO(EBADF,SS$_IVCHAN);
728 retval = io_close(io, not_implicit);
732 IoLINES_LEFT(io) = IoPAGE_LEN(io);
739 Perl_io_close(pTHX_ IO *io, bool not_implicit)
745 if (IoTYPE(io) == '|') {
746 status = PerlProc_pclose(IoIFP(io));
748 STATUS_NATIVE_SET(status);
749 retval = (STATUS_POSIX == 0);
752 retval = (status != -1);
755 else if (IoTYPE(io) == '-')
758 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
759 retval = (PerlIO_close(IoOFP(io)) != EOF);
760 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
763 retval = (PerlIO_close(IoIFP(io)) != EOF);
765 IoOFP(io) = IoIFP(io) = Nullfp;
767 else if (not_implicit) {
768 SETERRNO(EBADF,SS$_IVCHAN);
775 Perl_do_eof(pTHX_ GV *gv)
785 else if (ckWARN(WARN_IO)
786 && (IoTYPE(io) == '>' || IoIFP(io) == PerlIO_stdout()
787 || IoIFP(io) == PerlIO_stderr()))
789 SV* sv = sv_newmortal();
790 gv_efullname3(sv, gv, Nullch);
791 Perl_warner(aTHX_ WARN_IO, "Filehandle %s opened only for output",
797 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
798 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
799 return FALSE; /* this is the most usual case */
802 ch = PerlIO_getc(IoIFP(io));
804 (void)PerlIO_ungetc(IoIFP(io),ch);
807 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
808 if (PerlIO_get_cnt(IoIFP(io)) < -1)
809 PerlIO_set_cnt(IoIFP(io),-1);
811 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
812 if (!nextargv(PL_argvgv)) /* get another fp handy */
816 return TRUE; /* normal fp, definitely end of file */
822 Perl_do_tell(pTHX_ GV *gv)
827 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
828 #ifdef ULTRIX_STDIO_BOTCH
830 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
832 return PerlIO_tell(fp);
836 if (ckWARN(WARN_UNOPENED))
837 Perl_warner(aTHX_ WARN_UNOPENED, "tell() on unopened file");
839 SETERRNO(EBADF,RMS$_IFI);
844 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
849 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
850 #ifdef ULTRIX_STDIO_BOTCH
852 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
854 return PerlIO_seek(fp, pos, whence) >= 0;
858 if (ckWARN(WARN_UNOPENED))
859 Perl_warner(aTHX_ WARN_UNOPENED, "seek() on unopened file");
861 SETERRNO(EBADF,RMS$_IFI);
866 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
871 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
872 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
875 if (ckWARN(WARN_UNOPENED))
876 Perl_warner(aTHX_ WARN_UNOPENED, "sysseek() on unopened file");
878 SETERRNO(EBADF,RMS$_IFI);
883 Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int flag)
886 Perl_croak(aTHX_ "panic: unsetting binmode"); /* Not implemented yet */
888 #if defined(atarist) || defined(__MINT__)
889 if (!PerlIO_flush(fp) && (fp->_flag |= _IOBIN))
894 if (PerlLIO_setmode(PerlIO_fileno(fp), OP_BINARY) != -1) {
895 #if defined(WIN32) && defined(__BORLANDC__)
896 /* The translation mode of the stream is maintained independent
897 * of the translation mode of the fd in the Borland RTL (heavy
898 * digging through their runtime sources reveal). User has to
899 * set the mode explicitly for the stream (though they don't
900 * document this anywhere). GSAR 97-5-24
902 PerlIO_seek(fp,0L,0);
903 ((FILE*)fp)->flags |= _F_BIN;
911 #if defined(USEMYBINMODE)
912 if (my_binmode(fp,iotype) != FALSE)
922 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
923 /* code courtesy of William Kucharski */
926 I32 my_chsize(fd, length)
927 I32 fd; /* file descriptor */
928 Off_t length; /* length to set file to */
933 if (PerlLIO_fstat(fd, &filebuf) < 0)
936 if (filebuf.st_size < length) {
938 /* extend file length */
940 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
943 /* write a "0" byte */
945 if ((PerlLIO_write(fd, "", 1)) != 1)
949 /* truncate length */
954 fl.l_type = F_WRLCK; /* write lock on file space */
957 * This relies on the UNDOCUMENTED F_FREESP argument to
958 * fcntl(2), which truncates the file so that it ends at the
959 * position indicated by fl.l_start.
961 * Will minor miracles never cease?
964 if (fcntl(fd, F_FREESP, &fl) < 0)
971 #endif /* F_FREESP */
974 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
979 /* assuming fp is checked earlier */
985 if (SvIOK(sv) && SvIVX(sv) != 0) {
986 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
987 return !PerlIO_error(fp);
989 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
990 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
991 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
992 return !PerlIO_error(fp);
995 switch (SvTYPE(sv)) {
999 if (ckWARN(WARN_UNINITIALIZED))
1000 Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit);
1009 PerlIO_printf(fp, "%" PERL_PRIu64, (UV)SvUVX(sv));
1011 PerlIO_printf(fp, "%" PERL_PRId64, (IV)SvIVX(sv));
1014 PerlIO_printf(fp, "%lu", (unsigned long)SvUVX(sv));
1016 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
1018 return !PerlIO_error(fp);
1022 tmps = SvPV(sv, len);
1025 /* To detect whether the process is about to overstep its
1026 * filesize limit we would need getrlimit(). We could then
1027 * also transparently raise the limit with setrlimit() --
1028 * but only until the system hard limit/the filesystem limit,
1029 * at which we would get EPERM. Note that when using buffered
1030 * io the write failure can be delayed until the flush/close. --jhi */
1031 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
1033 return !PerlIO_error(fp);
1043 if (PL_op->op_flags & OPf_REF) {
1045 tmpgv = cGVOP->op_gv;
1048 if (io && IoIFP(io)) {
1050 sv_setpv(PL_statname,"");
1051 PL_laststype = OP_STAT;
1052 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1055 if (tmpgv == PL_defgv)
1056 return PL_laststatval;
1057 if (ckWARN(WARN_UNOPENED))
1058 Perl_warner(aTHX_ WARN_UNOPENED, "Stat on unopened file <%s>",
1061 sv_setpv(PL_statname,"");
1062 return (PL_laststatval = -1);
1070 if (SvTYPE(sv) == SVt_PVGV) {
1074 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1075 tmpgv = (GV*)SvRV(sv);
1081 sv_setpv(PL_statname, s);
1082 PL_laststype = OP_STAT;
1083 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1084 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1085 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
1086 return PL_laststatval;
1096 if (PL_op->op_flags & OPf_REF) {
1098 if (cGVOP->op_gv == PL_defgv) {
1099 if (PL_laststype != OP_LSTAT)
1100 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
1101 return PL_laststatval;
1103 Perl_croak(aTHX_ "You can't use -l on a filehandle");
1106 PL_laststype = OP_LSTAT;
1110 sv_setpv(PL_statname,SvPV(sv, n_a));
1111 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
1112 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
1113 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
1114 return PL_laststatval;
1118 Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1120 return do_aexec5(really, mark, sp, 0, 0);
1124 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1125 int fd, int do_report)
1133 New(401,PL_Argv, sp - mark + 1, char*);
1135 while (++mark <= sp) {
1137 *a++ = SvPVx(*mark, n_a);
1142 if (*PL_Argv[0] != '/') /* will execvp use PATH? */
1143 TAINT_ENV(); /* testing IFS here is overkill, probably */
1144 if (really && *(tmps = SvPV(really, n_a)))
1145 PerlProc_execvp(tmps,PL_Argv);
1147 PerlProc_execvp(PL_Argv[0],PL_Argv);
1148 if (ckWARN(WARN_EXEC))
1149 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1150 PL_Argv[0], Strerror(errno));
1154 PerlLIO_write(fd, (void*)&e, sizeof(int));
1163 Perl_do_execfree(pTHX)
1167 PL_Argv = Null(char **);
1175 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC)
1178 Perl_do_exec(pTHX_ char *cmd)
1180 return do_exec3(cmd,0,0);
1184 Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1190 while (*cmd && isSPACE(*cmd))
1193 /* save an extra exec if possible */
1196 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1198 s = cmd+PL_cshlen+3;
1212 if (s[-1] == '\'') {
1214 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1222 /* see if there are shell metacharacters in it */
1224 if (*cmd == '.' && isSPACE(cmd[1]))
1227 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1230 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
1234 for (s = cmd; *s; s++) {
1235 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1236 if (*s == '\n' && !s[1]) {
1240 /* handle the 2>&1 construct at the end */
1241 if (*s == '>' && s[1] == '&' && s[2] == '1'
1242 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1243 && (!s[3] || isSPACE(s[3])))
1247 while (*t && isSPACE(*t))
1249 if (!*t && (dup2(1,2) != -1)) {
1255 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1260 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1261 PL_Cmd = savepvn(cmd, s-cmd);
1263 for (s = PL_Cmd; *s;) {
1264 while (*s && isSPACE(*s)) s++;
1267 while (*s && !isSPACE(*s)) s++;
1273 PerlProc_execvp(PL_Argv[0],PL_Argv);
1274 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1282 if (ckWARN(WARN_EXEC))
1283 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1284 PL_Argv[0], Strerror(errno));
1286 PerlLIO_write(fd, (void*)&e, sizeof(int));
1295 #endif /* OS2 || WIN32 */
1298 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1303 register I32 tot = 0;
1306 SV **oldmark = mark;
1309 #define APPLY_TAINT_PROPER() \
1311 if (PL_tainted) { TAINT_PROPER(what); } \
1314 /* This is a first heuristic; it doesn't catch tainting magic. */
1316 while (++mark <= sp) {
1317 if (SvTAINTED(*mark)) {
1327 APPLY_TAINT_PROPER();
1330 APPLY_TAINT_PROPER();
1332 while (++mark <= sp) {
1333 char *name = SvPVx(*mark, n_a);
1334 APPLY_TAINT_PROPER();
1335 if (PerlLIO_chmod(name, val))
1343 APPLY_TAINT_PROPER();
1344 if (sp - mark > 2) {
1345 val = SvIVx(*++mark);
1346 val2 = SvIVx(*++mark);
1347 APPLY_TAINT_PROPER();
1349 while (++mark <= sp) {
1350 char *name = SvPVx(*mark, n_a);
1351 APPLY_TAINT_PROPER();
1352 if (PerlLIO_chown(name, val, val2))
1359 XXX Should we make lchown() directly available from perl?
1360 For now, we'll let Configure test for HAS_LCHOWN, but do
1361 nothing in the core.
1367 APPLY_TAINT_PROPER();
1370 s = SvPVx(*++mark, n_a);
1372 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1374 if (!(val = whichsig(s)))
1375 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1379 APPLY_TAINT_PROPER();
1382 /* kill() doesn't do process groups (job trees?) under VMS */
1383 if (val < 0) val = -val;
1384 if (val == SIGKILL) {
1385 # include <starlet.h>
1386 /* Use native sys$delprc() to insure that target process is
1387 * deleted; supervisor-mode images don't pay attention to
1388 * CRTL's emulation of Unix-style signals and kill()
1390 while (++mark <= sp) {
1391 I32 proc = SvIVx(*mark);
1392 register unsigned long int __vmssts;
1393 APPLY_TAINT_PROPER();
1394 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1398 case SS$_NOSUCHNODE:
1399 SETERRNO(ESRCH,__vmssts);
1402 SETERRNO(EPERM,__vmssts);
1405 SETERRNO(EVMSERR,__vmssts);
1414 while (++mark <= sp) {
1415 I32 proc = SvIVx(*mark);
1416 APPLY_TAINT_PROPER();
1418 if (PerlProc_killpg(proc,val)) /* BSD */
1420 if (PerlProc_kill(-proc,val)) /* SYSV */
1426 while (++mark <= sp) {
1427 I32 proc = SvIVx(*mark);
1428 APPLY_TAINT_PROPER();
1429 if (PerlProc_kill(proc, val))
1437 APPLY_TAINT_PROPER();
1439 while (++mark <= sp) {
1440 s = SvPVx(*mark, n_a);
1441 APPLY_TAINT_PROPER();
1442 if (PL_euid || PL_unsafe) {
1446 else { /* don't let root wipe out directories without -U */
1447 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1459 APPLY_TAINT_PROPER();
1460 if (sp - mark > 2) {
1461 #if defined(I_UTIME) || defined(VMS)
1462 struct utimbuf utbuf;
1470 Zero(&utbuf, sizeof utbuf, char);
1472 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1473 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1475 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1476 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
1478 APPLY_TAINT_PROPER();
1480 while (++mark <= sp) {
1481 char *name = SvPVx(*mark, n_a);
1482 APPLY_TAINT_PROPER();
1483 if (PerlLIO_utime(name, &utbuf))
1494 #undef APPLY_TAINT_PROPER
1497 /* Do the permissions allow some operation? Assumes statcache already set. */
1498 #ifndef VMS /* VMS' cando is in vms.c */
1500 Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register Stat_t *statbufp)
1501 /* Note: we use `effective' both for uids and gids.
1502 * Here we are betting on Uid_t being equal or wider than Gid_t. */
1505 /* [Comments and code from Len Reed]
1506 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1507 * to write-protected files. The execute permission bit is set
1508 * by the Miscrosoft C library stat() function for the following:
1513 * All files and directories are readable.
1514 * Directories and special files, e.g. "CON", cannot be
1516 * [Comment by Tom Dinger -- a directory can have the write-protect
1517 * bit set in the file system, but DOS permits changes to
1518 * the directory anyway. In addition, all bets are off
1519 * here for networked software, such as Novell and
1523 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1524 * too so it will actually look into the files for magic numbers
1526 return (mode & statbufp->st_mode) ? TRUE : FALSE;
1528 #else /* ! DOSISH */
1529 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1530 if (mode == S_IXUSR) {
1531 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1535 return TRUE; /* root reads and writes anything */
1538 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1539 if (statbufp->st_mode & mode)
1540 return TRUE; /* ok as "user" */
1542 else if (ingroup(statbufp->st_gid,effective)) {
1543 if (statbufp->st_mode & mode >> 3)
1544 return TRUE; /* ok as "group" */
1546 else if (statbufp->st_mode & mode >> 6)
1547 return TRUE; /* ok as "other" */
1549 #endif /* ! DOSISH */
1554 Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective)
1556 if (testgid == (effective ? PL_egid : PL_gid))
1558 #ifdef HAS_GETGROUPS
1563 Groups_t gary[NGROUPS];
1566 anum = getgroups(NGROUPS,gary);
1568 if (gary[anum] == testgid)
1575 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1578 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1584 key = (key_t)SvNVx(*++mark);
1585 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1586 flags = SvIVx(*++mark);
1592 return msgget(key, flags);
1596 return semget(key, n, flags);
1600 return shmget(key, n, flags);
1602 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1604 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1607 return -1; /* should never happen */
1611 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
1616 I32 id, n, cmd, infosize, getinfo;
1619 id = SvIVx(*++mark);
1620 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1621 cmd = SvIVx(*++mark);
1624 getinfo = (cmd == IPC_STAT);
1630 if (cmd == IPC_STAT || cmd == IPC_SET)
1631 infosize = sizeof(struct msqid_ds);
1636 if (cmd == IPC_STAT || cmd == IPC_SET)
1637 infosize = sizeof(struct shmid_ds);
1643 if (cmd == IPC_STAT || cmd == IPC_SET)
1644 infosize = sizeof(struct semid_ds);
1645 else if (cmd == GETALL || cmd == SETALL)
1647 struct semid_ds semds;
1651 getinfo = (cmd == GETALL);
1652 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1654 infosize = semds.sem_nsems * sizeof(short);
1655 /* "short" is technically wrong but much more portable
1656 than guessing about u_?short(_t)? */
1659 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1663 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1665 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1674 SvPV_force(astr, len);
1675 a = SvGROW(astr, infosize+1);
1679 a = SvPV(astr, len);
1680 if (len != infosize)
1681 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
1690 a = INT2PTR(char *,i); /* ouch */
1697 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1703 union semun unsemds;
1705 unsemds.buf = (struct semid_ds *)a;
1706 ret = Semctl(id, n, cmd, unsemds);
1708 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1715 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1719 if (getinfo && ret >= 0) {
1720 SvCUR_set(astr, infosize);
1721 *SvEND(astr) = '\0';
1728 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
1734 I32 id, msize, flags;
1737 id = SvIVx(*++mark);
1739 flags = SvIVx(*++mark);
1740 mbuf = SvPV(mstr, len);
1741 if ((msize = len - sizeof(long)) < 0)
1742 Perl_croak(aTHX_ "Arg too short for msgsnd");
1744 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1746 Perl_croak(aTHX_ "msgsnd not implemented");
1751 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
1758 I32 id, msize, flags, ret;
1761 id = SvIVx(*++mark);
1763 msize = SvIVx(*++mark);
1764 mtype = (long)SvIVx(*++mark);
1765 flags = SvIVx(*++mark);
1766 SvPV_force(mstr, len);
1767 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1770 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1772 SvCUR_set(mstr, sizeof(long)+ret);
1773 *SvEND(mstr) = '\0';
1777 Perl_croak(aTHX_ "msgrcv not implemented");
1782 Perl_do_semop(pTHX_ SV **mark, SV **sp)
1791 id = SvIVx(*++mark);
1793 opbuf = SvPV(opstr, opsize);
1794 if (opsize < sizeof(struct sembuf)
1795 || (opsize % sizeof(struct sembuf)) != 0) {
1796 SETERRNO(EINVAL,LIB$_INVARG);
1800 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1802 Perl_croak(aTHX_ "semop not implemented");
1807 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
1813 I32 id, mpos, msize;
1815 struct shmid_ds shmds;
1817 id = SvIVx(*++mark);
1819 mpos = SvIVx(*++mark);
1820 msize = SvIVx(*++mark);
1822 if (shmctl(id, IPC_STAT, &shmds) == -1)
1824 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1825 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1828 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1829 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1831 if (optype == OP_SHMREAD) {
1832 SvPV_force(mstr, len);
1833 mbuf = SvGROW(mstr, msize+1);
1835 Copy(shm + mpos, mbuf, msize, char);
1836 SvCUR_set(mstr, msize);
1837 *SvEND(mstr) = '\0';
1843 mbuf = SvPV(mstr, len);
1844 if ((n = len) > msize)
1846 Copy(mbuf, shm + mpos, n, char);
1848 memzero(shm + mpos + n, msize - n);
1852 Perl_croak(aTHX_ "shm I/O not implemented");
1856 #endif /* SYSV IPC */