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(SOCKS) || 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, int rawmode, int rawperm, PerlIO *supplied_fp)
92 register IO *io = GvIOn(gv);
93 PerlIO *saveifp = Nullfp;
94 PerlIO *saveofp = Nullfp;
100 bool was_fdopen = FALSE;
102 PL_forkprocess = 1; /* assume true if no fork */
105 fd = PerlIO_fileno(IoIFP(io));
106 if (IoTYPE(io) == '-')
108 else if (fd <= PL_maxsysfd) {
111 savetype = IoTYPE(io);
114 else if (IoTYPE(io) == '|')
115 result = PerlProc_pclose(IoIFP(io));
116 else if (IoIFP(io) != IoOFP(io)) {
118 result = PerlIO_close(IoOFP(io));
119 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
122 result = PerlIO_close(IoIFP(io));
125 result = PerlIO_close(IoIFP(io));
126 if (result == EOF && fd > PL_maxsysfd)
127 PerlIO_printf(PerlIO_stderr(), "Warning: unable to close filehandle %s properly.\n",
129 IoOFP(io) = IoIFP(io) = Nullfp;
133 #if defined(O_LARGEFILE)
134 rawmode |= O_LARGEFILE;
138 #define O_ACCMODE 3 /* Assume traditional implementation */
141 switch (result = rawmode & O_ACCMODE) {
154 writing = (result > 0);
155 fd = PerlLIO_open3(name, rawmode, rawperm);
161 if (result == O_RDONLY)
164 else if (rawmode & O_APPEND)
165 fpmode = (result == O_WRONLY) ? "a" : "a+";
168 fpmode = (result == O_WRONLY) ? "w" : "r+";
169 fp = PerlIO_fdopen(fd, fpmode);
176 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
179 myname = savepvn(name, len);
182 while (len && isSPACE(name[len-1]))
185 mode[0] = mode[1] = mode[2] = '\0';
187 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
195 for (name++; isSPACE(*name); name++) ;
196 if (*name == '\0') { /* command is missing 19990114 */
198 if (ckWARN(WARN_PIPE))
199 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
205 TAINT_PROPER("piped open");
206 if (name[strlen(name)-1] == '|') {
208 name[strlen(name)-1] = '\0' ;
209 if (ckWARN(WARN_PIPE))
210 Perl_warner(aTHX_ WARN_PIPE, "Can't do bidirectional pipe");
212 fp = PerlProc_popen(name,"w");
215 else if (*name == '>') {
216 TAINT_PROPER("open");
219 mode[0] = IoTYPE(io) = 'a';
234 if (!*name && supplied_fp)
238 for (; isSPACE(*name); name++) ;
243 gv = gv_fetchpv(name,FALSE,SVt_PVIO);
247 SETERRNO(EINVAL,SS$_IVCHAN);
252 fd = PerlIO_fileno(IoIFP(thatio));
253 if (IoTYPE(thatio) == 's')
260 fd = PerlLIO_dup(fd);
263 if (!(fp = PerlIO_fdopen(fd,mode))) {
271 for (; isSPACE(*name); name++) ;
272 if (strEQ(name,"-")) {
273 fp = PerlIO_stdout();
277 fp = PerlIO_open(name,mode);
281 else if (*name == '<') {
283 for (name++; isSPACE(*name); name++) ;
287 if (strEQ(name,"-")) {
292 fp = PerlIO_open(name,mode);
294 else if (len > 1 && name[len-1] == '|') {
296 while (len && isSPACE(name[len-1]))
299 for (; isSPACE(*name); name++) ;
300 if (*name == '\0') { /* command is missing 19990114 */
302 if (ckWARN(WARN_PIPE))
303 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
309 TAINT_PROPER("piped open");
310 fp = PerlProc_popen(name,"r");
316 for (; isSPACE(*name); name++) ;
317 if (strEQ(name,"-")) {
322 fp = PerlIO_open(name,"r");
327 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == '<' && strchr(name, '\n'))
328 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
332 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
334 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
335 (void)PerlIO_close(fp);
338 if (S_ISSOCK(PL_statbuf.st_mode))
339 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
343 !(PL_statbuf.st_mode & S_IFMT)
349 Sock_size_t buflen = sizeof tmpbuf;
350 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
352 || errno != ENOTSOCK)
353 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
354 /* but some return 0 for streams too, sigh */
358 if (saveifp) { /* must use old fp? */
359 fd = PerlIO_fileno(saveifp);
361 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
362 if (saveofp != saveifp) { /* was a socket? */
363 PerlIO_close(saveofp);
368 if (fd != PerlIO_fileno(fp)) {
372 PerlLIO_dup2(PerlIO_fileno(fp), fd);
373 sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
374 (void)SvUPGRADE(sv, SVt_IV);
377 sv = *av_fetch(PL_fdpid,fd,TRUE);
378 (void)SvUPGRADE(sv, SVt_IV);
387 #if defined(HAS_FCNTL) && defined(F_SETFD)
389 int save_errno = errno;
390 fd = PerlIO_fileno(fp);
391 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
398 if (IoTYPE(io) == 's'
399 || (IoTYPE(io) == '>' && S_ISCHR(PL_statbuf.st_mode)) ) {
400 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
414 IoTYPE(io) = savetype;
419 Perl_nextargv(pTHX_ register GV *gv)
422 #ifndef FLEXFILENAMES
430 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
431 if (PL_filemode & (S_ISUID|S_ISGID)) {
432 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
434 (void)fchmod(PL_lastfd,PL_filemode);
436 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
440 while (av_len(GvAV(gv)) >= 0) {
443 sv = av_shift(GvAV(gv));
445 sv_setsv(GvSV(gv),sv);
446 SvSETMAGIC(GvSV(gv));
447 PL_oldname = SvPVx(GvSV(gv), oldlen);
448 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
450 TAINT_PROPER("inplace open");
451 if (oldlen == 1 && *PL_oldname == '-') {
452 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
453 return IoIFP(GvIOp(gv));
455 #ifndef FLEXFILENAMES
456 filedev = PL_statbuf.st_dev;
457 fileino = PL_statbuf.st_ino;
459 PL_filemode = PL_statbuf.st_mode;
460 fileuid = PL_statbuf.st_uid;
461 filegid = PL_statbuf.st_gid;
462 if (!S_ISREG(PL_filemode)) {
463 Perl_warn(aTHX_ "Can't do inplace edit: %s is not a regular file",
469 char *star = strchr(PL_inplace, '*');
471 char *begin = PL_inplace;
472 sv_setpvn(sv, "", 0);
474 sv_catpvn(sv, begin, star - begin);
475 sv_catpvn(sv, PL_oldname, oldlen);
477 } while ((star = strchr(begin, '*')));
482 sv_catpv(sv,PL_inplace);
484 #ifndef FLEXFILENAMES
485 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
486 && PL_statbuf.st_dev == filedev
487 && PL_statbuf.st_ino == fileino
489 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
492 Perl_warn(aTHX_ "Can't do inplace edit: %s would not be unique",
500 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
501 Perl_warn(aTHX_ "Can't rename %s to %s: %s, skipping file",
502 PL_oldname, SvPVX(sv), Strerror(errno) );
508 (void)PerlLIO_unlink(SvPVX(sv));
509 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
510 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
513 (void)UNLINK(SvPVX(sv));
514 if (link(PL_oldname,SvPVX(sv)) < 0) {
515 Perl_warn(aTHX_ "Can't rename %s to %s: %s, skipping file",
516 PL_oldname, SvPVX(sv), Strerror(errno) );
520 (void)UNLINK(PL_oldname);
524 #if !defined(DOSISH) && !defined(AMIGAOS)
525 # ifndef VMS /* Don't delete; use automatic file versioning */
526 if (UNLINK(PL_oldname) < 0) {
527 Perl_warn(aTHX_ "Can't remove %s: %s, skipping file",
528 PL_oldname, Strerror(errno) );
534 Perl_croak(aTHX_ "Can't do inplace edit without backup");
538 sv_setpvn(sv,">",!PL_inplace);
539 sv_catpvn(sv,PL_oldname,oldlen);
540 SETERRNO(0,0); /* in case sprintf set errno */
542 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
543 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp)) {
545 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
546 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) {
548 Perl_warn(aTHX_ "Can't do inplace edit on %s: %s",
549 PL_oldname, Strerror(errno) );
553 setdefout(PL_argvoutgv);
554 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
555 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
557 (void)fchmod(PL_lastfd,PL_filemode);
559 # if !(defined(WIN32) && defined(__BORLANDC__))
560 /* Borland runtime creates a readonly file! */
561 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
564 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
566 (void)fchown(PL_lastfd,fileuid,filegid);
569 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
574 return IoIFP(GvIOp(gv));
577 PerlIO_printf(PerlIO_stderr(), "Can't open %s: %s\n",
578 SvPV(sv, oldlen), Strerror(errno));
581 (void)do_close(PL_argvoutgv,FALSE);
582 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
589 Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
608 if (PerlProc_pipe(fd) < 0)
610 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
611 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
612 IoIFP(wstio) = IoOFP(wstio);
615 if (!IoIFP(rstio) || !IoOFP(wstio)) {
616 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
617 else PerlLIO_close(fd[0]);
618 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
619 else PerlLIO_close(fd[1]);
623 sv_setsv(sv,&PL_sv_yes);
627 sv_setsv(sv,&PL_sv_undef);
632 /* explicit renamed to avoid C++ conflict -- kja */
634 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
641 if (!gv || SvTYPE(gv) != SVt_PVGV) {
643 SETERRNO(EBADF,SS$_IVCHAN);
647 if (!io) { /* never opened */
650 if (ckWARN(WARN_UNOPENED))
651 Perl_warner(aTHX_ WARN_UNOPENED,
652 "Close on unopened file <%s>",GvENAME(gv));
653 SETERRNO(EBADF,SS$_IVCHAN);
657 retval = io_close(io);
661 IoLINES_LEFT(io) = IoPAGE_LEN(io);
668 Perl_io_close(pTHX_ IO *io)
674 if (IoTYPE(io) == '|') {
675 status = PerlProc_pclose(IoIFP(io));
676 STATUS_NATIVE_SET(status);
677 retval = (STATUS_POSIX == 0);
679 else if (IoTYPE(io) == '-')
682 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
683 retval = (PerlIO_close(IoOFP(io)) != EOF);
684 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
687 retval = (PerlIO_close(IoIFP(io)) != EOF);
689 IoOFP(io) = IoIFP(io) = Nullfp;
692 SETERRNO(EBADF,SS$_IVCHAN);
699 Perl_do_eof(pTHX_ GV *gv)
712 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
713 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
714 return FALSE; /* this is the most usual case */
717 ch = PerlIO_getc(IoIFP(io));
719 (void)PerlIO_ungetc(IoIFP(io),ch);
722 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
723 if (PerlIO_get_cnt(IoIFP(io)) < -1)
724 PerlIO_set_cnt(IoIFP(io),-1);
726 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
727 if (!nextargv(PL_argvgv)) /* get another fp handy */
731 return TRUE; /* normal fp, definitely end of file */
737 Perl_do_tell(pTHX_ GV *gv)
742 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
743 #ifdef ULTRIX_STDIO_BOTCH
745 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
747 return PerlIO_tell(fp);
751 if (ckWARN(WARN_UNOPENED))
752 Perl_warner(aTHX_ WARN_UNOPENED, "tell() on unopened file");
754 SETERRNO(EBADF,RMS$_IFI);
759 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
764 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
765 #ifdef ULTRIX_STDIO_BOTCH
767 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
769 return PerlIO_seek(fp, pos, whence) >= 0;
773 if (ckWARN(WARN_UNOPENED))
774 Perl_warner(aTHX_ WARN_UNOPENED, "seek() on unopened file");
776 SETERRNO(EBADF,RMS$_IFI);
781 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
786 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
787 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
790 if (ckWARN(WARN_UNOPENED))
791 Perl_warner(aTHX_ WARN_UNOPENED, "sysseek() on unopened file");
793 SETERRNO(EBADF,RMS$_IFI);
798 Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int flag)
801 Perl_croak(aTHX_ "panic: unsetting binmode"); /* Not implemented yet */
803 #if defined(atarist) || defined(__MINT__)
804 if (!PerlIO_flush(fp) && (fp->_flag |= _IOBIN))
809 if (PerlLIO_setmode(PerlIO_fileno(fp), OP_BINARY) != -1) {
810 #if defined(WIN32) && defined(__BORLANDC__)
811 /* The translation mode of the stream is maintained independent
812 * of the translation mode of the fd in the Borland RTL (heavy
813 * digging through their runtime sources reveal). User has to
814 * set the mode explicitly for the stream (though they don't
815 * document this anywhere). GSAR 97-5-24
817 PerlIO_seek(fp,0L,0);
818 ((FILE*)fp)->flags |= _F_BIN;
826 #if defined(USEMYBINMODE)
827 if (my_binmode(fp,iotype) != FALSE)
837 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
838 /* code courtesy of William Kucharski */
841 I32 my_chsize(fd, length)
842 I32 fd; /* file descriptor */
843 Off_t length; /* length to set file to */
848 if (PerlLIO_fstat(fd, &filebuf) < 0)
851 if (filebuf.st_size < length) {
853 /* extend file length */
855 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
858 /* write a "0" byte */
860 if ((PerlLIO_write(fd, "", 1)) != 1)
864 /* truncate length */
869 fl.l_type = F_WRLCK; /* write lock on file space */
872 * This relies on the UNDOCUMENTED F_FREESP argument to
873 * fcntl(2), which truncates the file so that it ends at the
874 * position indicated by fl.l_start.
876 * Will minor miracles never cease?
879 if (fcntl(fd, F_FREESP, &fl) < 0)
886 #endif /* F_FREESP */
889 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
894 /* assuming fp is checked earlier */
900 if (SvIOK(sv) && SvIVX(sv) != 0) {
901 PerlIO_printf(fp, PL_ofmt, (double)SvIVX(sv));
902 return !PerlIO_error(fp);
904 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
905 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
906 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
907 return !PerlIO_error(fp);
910 switch (SvTYPE(sv)) {
914 if (ckWARN(WARN_UNINITIALIZED))
915 Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit);
922 if (SvIsUV(sv)) /* XXXX 64-bit? */
923 PerlIO_printf(fp, "%lu", (unsigned long)SvUVX(sv));
925 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
926 return !PerlIO_error(fp);
930 tmps = SvPV(sv, len);
933 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
935 return !PerlIO_error(fp);
945 if (PL_op->op_flags & OPf_REF) {
947 tmpgv = cGVOP->op_gv;
950 if (io && IoIFP(io)) {
952 sv_setpv(PL_statname,"");
953 PL_laststype = OP_STAT;
954 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
957 if (tmpgv == PL_defgv)
958 return PL_laststatval;
959 if (ckWARN(WARN_UNOPENED))
960 Perl_warner(aTHX_ WARN_UNOPENED, "Stat on unopened file <%s>",
963 sv_setpv(PL_statname,"");
964 return (PL_laststatval = -1);
972 if (SvTYPE(sv) == SVt_PVGV) {
976 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
977 tmpgv = (GV*)SvRV(sv);
983 sv_setpv(PL_statname, s);
984 PL_laststype = OP_STAT;
985 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
986 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
987 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
988 return PL_laststatval;
998 if (PL_op->op_flags & OPf_REF) {
1000 if (cGVOP->op_gv == PL_defgv) {
1001 if (PL_laststype != OP_LSTAT)
1002 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
1003 return PL_laststatval;
1005 Perl_croak(aTHX_ "You can't use -l on a filehandle");
1008 PL_laststype = OP_LSTAT;
1012 sv_setpv(PL_statname,SvPV(sv, n_a));
1013 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
1014 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
1015 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
1016 return PL_laststatval;
1020 Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1028 New(401,PL_Argv, sp - mark + 1, char*);
1030 while (++mark <= sp) {
1032 *a++ = SvPVx(*mark, n_a);
1037 if (*PL_Argv[0] != '/') /* will execvp use PATH? */
1038 TAINT_ENV(); /* testing IFS here is overkill, probably */
1039 if (really && *(tmps = SvPV(really, n_a)))
1040 PerlProc_execvp(tmps,PL_Argv);
1042 PerlProc_execvp(PL_Argv[0],PL_Argv);
1043 if (ckWARN(WARN_EXEC))
1044 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1045 PL_Argv[0], Strerror(errno));
1052 Perl_do_execfree(pTHX)
1056 PL_Argv = Null(char **);
1064 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC)
1067 Perl_do_exec(pTHX_ char *cmd)
1069 return do_exec3(cmd,0,0);
1073 Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1079 while (*cmd && isSPACE(*cmd))
1082 /* save an extra exec if possible */
1085 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1087 s = cmd+PL_cshlen+3;
1101 if (s[-1] == '\'') {
1103 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1111 /* see if there are shell metacharacters in it */
1113 if (*cmd == '.' && isSPACE(cmd[1]))
1116 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1119 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
1123 for (s = cmd; *s; s++) {
1124 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1125 if (*s == '\n' && !s[1]) {
1130 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1135 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1136 PL_Cmd = savepvn(cmd, s-cmd);
1138 for (s = PL_Cmd; *s;) {
1139 while (*s && isSPACE(*s)) s++;
1142 while (*s && !isSPACE(*s)) s++;
1148 PerlProc_execvp(PL_Argv[0],PL_Argv);
1149 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1157 if (ckWARN(WARN_EXEC))
1158 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1159 PL_Argv[0], Strerror(errno));
1161 PerlLIO_write(fd, (void*)&e, sizeof(int));
1170 #endif /* OS2 || WIN32 */
1173 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1178 register I32 tot = 0;
1181 SV **oldmark = mark;
1184 #define APPLY_TAINT_PROPER() \
1186 if (PL_tainted) { TAINT_PROPER(what); } \
1189 /* This is a first heuristic; it doesn't catch tainting magic. */
1191 while (++mark <= sp) {
1192 if (SvTAINTED(*mark)) {
1202 APPLY_TAINT_PROPER();
1205 APPLY_TAINT_PROPER();
1207 while (++mark <= sp) {
1208 char *name = SvPVx(*mark, n_a);
1209 APPLY_TAINT_PROPER();
1210 if (PerlLIO_chmod(name, val))
1218 APPLY_TAINT_PROPER();
1219 if (sp - mark > 2) {
1220 val = SvIVx(*++mark);
1221 val2 = SvIVx(*++mark);
1222 APPLY_TAINT_PROPER();
1224 while (++mark <= sp) {
1225 char *name = SvPVx(*mark, n_a);
1226 APPLY_TAINT_PROPER();
1227 if (PerlLIO_chown(name, val, val2))
1234 XXX Should we make lchown() directly available from perl?
1235 For now, we'll let Configure test for HAS_LCHOWN, but do
1236 nothing in the core.
1242 APPLY_TAINT_PROPER();
1245 s = SvPVx(*++mark, n_a);
1247 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1249 if (!(val = whichsig(s)))
1250 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1254 APPLY_TAINT_PROPER();
1257 /* kill() doesn't do process groups (job trees?) under VMS */
1258 if (val < 0) val = -val;
1259 if (val == SIGKILL) {
1260 # include <starlet.h>
1261 /* Use native sys$delprc() to insure that target process is
1262 * deleted; supervisor-mode images don't pay attention to
1263 * CRTL's emulation of Unix-style signals and kill()
1265 while (++mark <= sp) {
1266 I32 proc = SvIVx(*mark);
1267 register unsigned long int __vmssts;
1268 APPLY_TAINT_PROPER();
1269 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1273 case SS$_NOSUCHNODE:
1274 SETERRNO(ESRCH,__vmssts);
1277 SETERRNO(EPERM,__vmssts);
1280 SETERRNO(EVMSERR,__vmssts);
1289 while (++mark <= sp) {
1290 I32 proc = SvIVx(*mark);
1291 APPLY_TAINT_PROPER();
1293 if (PerlProc_killpg(proc,val)) /* BSD */
1295 if (PerlProc_kill(-proc,val)) /* SYSV */
1301 while (++mark <= sp) {
1302 I32 proc = SvIVx(*mark);
1303 APPLY_TAINT_PROPER();
1304 if (PerlProc_kill(proc, val))
1312 APPLY_TAINT_PROPER();
1314 while (++mark <= sp) {
1315 s = SvPVx(*mark, n_a);
1316 APPLY_TAINT_PROPER();
1317 if (PL_euid || PL_unsafe) {
1321 else { /* don't let root wipe out directories without -U */
1322 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1334 APPLY_TAINT_PROPER();
1335 if (sp - mark > 2) {
1336 #if defined(I_UTIME) || defined(VMS)
1337 struct utimbuf utbuf;
1345 Zero(&utbuf, sizeof utbuf, char);
1347 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1348 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1350 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1351 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
1353 APPLY_TAINT_PROPER();
1355 while (++mark <= sp) {
1356 char *name = SvPVx(*mark, n_a);
1357 APPLY_TAINT_PROPER();
1358 if (PerlLIO_utime(name, &utbuf))
1369 #undef APPLY_TAINT_PROPER
1372 /* Do the permissions allow some operation? Assumes statcache already set. */
1373 #ifndef VMS /* VMS' cando is in vms.c */
1375 Perl_cando(pTHX_ I32 bit, I32 effective, register struct stat *statbufp)
1378 /* [Comments and code from Len Reed]
1379 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1380 * to write-protected files. The execute permission bit is set
1381 * by the Miscrosoft C library stat() function for the following:
1386 * All files and directories are readable.
1387 * Directories and special files, e.g. "CON", cannot be
1389 * [Comment by Tom Dinger -- a directory can have the write-protect
1390 * bit set in the file system, but DOS permits changes to
1391 * the directory anyway. In addition, all bets are off
1392 * here for networked software, such as Novell and
1396 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1397 * too so it will actually look into the files for magic numbers
1399 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1401 #else /* ! DOSISH */
1402 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1403 if (bit == S_IXUSR) {
1404 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1408 return TRUE; /* root reads and writes anything */
1411 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1412 if (statbufp->st_mode & bit)
1413 return TRUE; /* ok as "user" */
1415 else if (ingroup((I32)statbufp->st_gid,effective)) {
1416 if (statbufp->st_mode & bit >> 3)
1417 return TRUE; /* ok as "group" */
1419 else if (statbufp->st_mode & bit >> 6)
1420 return TRUE; /* ok as "other" */
1422 #endif /* ! DOSISH */
1427 Perl_ingroup(pTHX_ I32 testgid, I32 effective)
1429 if (testgid == (effective ? PL_egid : PL_gid))
1431 #ifdef HAS_GETGROUPS
1436 Groups_t gary[NGROUPS];
1439 anum = getgroups(NGROUPS,gary);
1441 if (gary[anum] == testgid)
1448 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1451 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1457 key = (key_t)SvNVx(*++mark);
1458 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1459 flags = SvIVx(*++mark);
1465 return msgget(key, flags);
1469 return semget(key, n, flags);
1473 return shmget(key, n, flags);
1475 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1477 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1480 return -1; /* should never happen */
1484 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
1489 I32 id, n, cmd, infosize, getinfo;
1492 id = SvIVx(*++mark);
1493 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1494 cmd = SvIVx(*++mark);
1497 getinfo = (cmd == IPC_STAT);
1503 if (cmd == IPC_STAT || cmd == IPC_SET)
1504 infosize = sizeof(struct msqid_ds);
1509 if (cmd == IPC_STAT || cmd == IPC_SET)
1510 infosize = sizeof(struct shmid_ds);
1516 if (cmd == IPC_STAT || cmd == IPC_SET)
1517 infosize = sizeof(struct semid_ds);
1518 else if (cmd == GETALL || cmd == SETALL)
1520 struct semid_ds semds;
1524 getinfo = (cmd == GETALL);
1525 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1527 infosize = semds.sem_nsems * sizeof(short);
1528 /* "short" is technically wrong but much more portable
1529 than guessing about u_?short(_t)? */
1532 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1536 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1538 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1547 SvPV_force(astr, len);
1548 a = SvGROW(astr, infosize+1);
1552 a = SvPV(astr, len);
1553 if (len != infosize)
1554 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
1563 a = (char *)i; /* ouch */
1570 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1576 union semun unsemds;
1578 unsemds.buf = (struct semid_ds *)a;
1579 ret = Semctl(id, n, cmd, unsemds);
1581 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1588 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1592 if (getinfo && ret >= 0) {
1593 SvCUR_set(astr, infosize);
1594 *SvEND(astr) = '\0';
1601 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
1607 I32 id, msize, flags;
1610 id = SvIVx(*++mark);
1612 flags = SvIVx(*++mark);
1613 mbuf = SvPV(mstr, len);
1614 if ((msize = len - sizeof(long)) < 0)
1615 Perl_croak(aTHX_ "Arg too short for msgsnd");
1617 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1619 Perl_croak(aTHX_ "msgsnd not implemented");
1624 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
1631 I32 id, msize, flags, ret;
1634 id = SvIVx(*++mark);
1636 msize = SvIVx(*++mark);
1637 mtype = (long)SvIVx(*++mark);
1638 flags = SvIVx(*++mark);
1639 SvPV_force(mstr, len);
1640 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1643 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1645 SvCUR_set(mstr, sizeof(long)+ret);
1646 *SvEND(mstr) = '\0';
1650 Perl_croak(aTHX_ "msgrcv not implemented");
1655 Perl_do_semop(pTHX_ SV **mark, SV **sp)
1664 id = SvIVx(*++mark);
1666 opbuf = SvPV(opstr, opsize);
1667 if (opsize < sizeof(struct sembuf)
1668 || (opsize % sizeof(struct sembuf)) != 0) {
1669 SETERRNO(EINVAL,LIB$_INVARG);
1673 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1675 Perl_croak(aTHX_ "semop not implemented");
1680 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
1686 I32 id, mpos, msize;
1688 struct shmid_ds shmds;
1690 id = SvIVx(*++mark);
1692 mpos = SvIVx(*++mark);
1693 msize = SvIVx(*++mark);
1695 if (shmctl(id, IPC_STAT, &shmds) == -1)
1697 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1698 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1701 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1702 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1704 if (optype == OP_SHMREAD) {
1705 SvPV_force(mstr, len);
1706 mbuf = SvGROW(mstr, msize+1);
1708 Copy(shm + mpos, mbuf, msize, char);
1709 SvCUR_set(mstr, msize);
1710 *SvEND(mstr) = '\0';
1716 mbuf = SvPV(mstr, len);
1717 if ((n = len) > msize)
1719 Copy(mbuf, shm + mpos, n, char);
1721 memzero(shm + mpos + n, msize - n);
1725 Perl_croak(aTHX_ "shm I/O not implemented");
1729 #endif /* SYSV IPC */