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(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 fd = PerlIO_fileno(IoIFP(thatio));
286 if (IoTYPE(thatio) == 's')
293 fd = PerlLIO_dup(fd);
296 if (!(fp = PerlIO_fdopen(fd,mode))) {
304 for (; isSPACE(*type); type++) ;
305 if (strEQ(type,"-")) {
306 fp = PerlIO_stdout();
310 fp = PerlIO_open((num_svs ? name : type), mode);
314 else if (*type == '<') {
315 if (num_svs && tlen != 1)
318 for (type++; isSPACE(*type); type++) ;
324 if (strEQ(type,"-")) {
329 fp = PerlIO_open((num_svs ? name : type), mode);
331 else if (tlen > 1 && type[tlen-1] == '|') {
333 if (tlen != 2 || type[0] != '-')
338 while (tlen && isSPACE(type[tlen-1]))
341 for (; isSPACE(*type); type++) ;
344 if (*name == '\0') { /* command is missing 19990114 */
346 if (ckWARN(WARN_PIPE))
347 Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open");
351 if (strNE(name,"-") || num_svs)
353 TAINT_PROPER("piped open");
354 fp = PerlProc_popen(name,"r");
363 for (; isSPACE(*name); name++) ;
364 if (strEQ(name,"-")) {
369 fp = PerlIO_open(name,"r");
374 if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == '<' && strchr(name, '\n'))
375 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
379 IoTYPE(io) != '|' && IoTYPE(io) != '-') {
381 if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
382 (void)PerlIO_close(fp);
385 if (S_ISSOCK(PL_statbuf.st_mode))
386 IoTYPE(io) = 's'; /* in case a socket was passed in to us */
390 !(PL_statbuf.st_mode & S_IFMT)
396 Sock_size_t buflen = sizeof tmpbuf;
397 if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf,
399 || errno != ENOTSOCK)
400 IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
401 /* but some return 0 for streams too, sigh */
405 if (saveifp) { /* must use old fp? */
406 fd = PerlIO_fileno(saveifp);
408 PerlIO_flush(saveofp); /* emulate PerlIO_close() */
409 if (saveofp != saveifp) { /* was a socket? */
410 PerlIO_close(saveofp);
415 if (fd != PerlIO_fileno(fp)) {
419 PerlLIO_dup2(PerlIO_fileno(fp), fd);
420 sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE);
421 (void)SvUPGRADE(sv, SVt_IV);
424 sv = *av_fetch(PL_fdpid,fd,TRUE);
425 (void)SvUPGRADE(sv, SVt_IV);
434 #if defined(HAS_FCNTL) && defined(F_SETFD)
436 int save_errno = errno;
437 fd = PerlIO_fileno(fp);
438 fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */
445 if (IoTYPE(io) == 's'
446 || (IoTYPE(io) == '>' && S_ISCHR(PL_statbuf.st_mode)) ) {
447 if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) {
461 IoTYPE(io) = savetype;
466 Perl_nextargv(pTHX_ register GV *gv)
469 #ifndef FLEXFILENAMES
477 PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
478 if (PL_filemode & (S_ISUID|S_ISGID)) {
479 PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */
481 (void)fchmod(PL_lastfd,PL_filemode);
483 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
487 while (av_len(GvAV(gv)) >= 0) {
490 sv = av_shift(GvAV(gv));
492 sv_setsv(GvSV(gv),sv);
493 SvSETMAGIC(GvSV(gv));
494 PL_oldname = SvPVx(GvSV(gv), oldlen);
495 if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) {
497 TAINT_PROPER("inplace open");
498 if (oldlen == 1 && *PL_oldname == '-') {
499 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
500 return IoIFP(GvIOp(gv));
502 #ifndef FLEXFILENAMES
503 filedev = PL_statbuf.st_dev;
504 fileino = PL_statbuf.st_ino;
506 PL_filemode = PL_statbuf.st_mode;
507 fileuid = PL_statbuf.st_uid;
508 filegid = PL_statbuf.st_gid;
509 if (!S_ISREG(PL_filemode)) {
510 if (ckWARN_d(WARN_INPLACE))
511 Perl_warner(aTHX_ WARN_INPLACE,
512 "Can't do inplace edit: %s is not a regular file",
518 char *star = strchr(PL_inplace, '*');
520 char *begin = PL_inplace;
521 sv_setpvn(sv, "", 0);
523 sv_catpvn(sv, begin, star - begin);
524 sv_catpvn(sv, PL_oldname, oldlen);
526 } while ((star = strchr(begin, '*')));
531 sv_catpv(sv,PL_inplace);
533 #ifndef FLEXFILENAMES
534 if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0
535 && PL_statbuf.st_dev == filedev
536 && PL_statbuf.st_ino == fileino
538 || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0
542 if (ckWARN_d(WARN_INPLACE))
543 Perl_warner(aTHX_ WARN_INPLACE,
544 "Can't do inplace edit: %s would not be unique",
551 #if !defined(DOSISH) && !defined(CYGWIN)
552 if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
553 if (ckWARN_d(WARN_INPLACE))
554 Perl_warner(aTHX_ WARN_INPLACE,
555 "Can't rename %s to %s: %s, skipping file",
556 PL_oldname, SvPVX(sv), Strerror(errno) );
562 (void)PerlLIO_unlink(SvPVX(sv));
563 (void)PerlLIO_rename(PL_oldname,SvPVX(sv));
564 do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp);
567 (void)UNLINK(SvPVX(sv));
568 if (link(PL_oldname,SvPVX(sv)) < 0) {
569 if (ckWARN_d(WARN_INPLACE))
570 Perl_warner(aTHX_ WARN_INPLACE,
571 "Can't rename %s to %s: %s, skipping file",
572 PL_oldname, SvPVX(sv), Strerror(errno) );
576 (void)UNLINK(PL_oldname);
580 #if !defined(DOSISH) && !defined(AMIGAOS)
581 # ifndef VMS /* Don't delete; use automatic file versioning */
582 if (UNLINK(PL_oldname) < 0) {
583 if (ckWARN_d(WARN_INPLACE))
584 Perl_warner(aTHX_ WARN_INPLACE,
585 "Can't remove %s: %s, skipping file",
586 PL_oldname, Strerror(errno) );
592 Perl_croak(aTHX_ "Can't do inplace edit without backup");
596 sv_setpvn(sv,">",!PL_inplace);
597 sv_catpvn(sv,PL_oldname,oldlen);
598 SETERRNO(0,0); /* in case sprintf set errno */
600 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
601 O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp)) {
603 if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,
604 O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) {
606 if (ckWARN_d(WARN_INPLACE))
607 Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit on %s: %s",
608 PL_oldname, Strerror(errno) );
612 setdefout(PL_argvoutgv);
613 PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
614 (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf);
616 (void)fchmod(PL_lastfd,PL_filemode);
618 # if !(defined(WIN32) && defined(__BORLANDC__))
619 /* Borland runtime creates a readonly file! */
620 (void)PerlLIO_chmod(PL_oldname,PL_filemode);
623 if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) {
625 (void)fchown(PL_lastfd,fileuid,filegid);
628 (void)PerlLIO_chown(PL_oldname,fileuid,filegid);
633 return IoIFP(GvIOp(gv));
637 if (ckWARN_d(WARN_INPLACE)) {
638 if (!S_ISREG(PL_statbuf.st_mode))
639 Perl_warner(aTHX_ WARN_INPLACE,
640 "Can't do inplace edit: %s is not a regular file",
643 Perl_warner(aTHX_ WARN_INPLACE, "Can't open %s: %s\n",
644 PL_oldname, Strerror(errno));
649 (void)do_close(PL_argvoutgv,FALSE);
650 setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO));
657 Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv)
676 if (PerlProc_pipe(fd) < 0)
678 IoIFP(rstio) = PerlIO_fdopen(fd[0], "r");
679 IoOFP(wstio) = PerlIO_fdopen(fd[1], "w");
680 IoIFP(wstio) = IoOFP(wstio);
683 if (!IoIFP(rstio) || !IoOFP(wstio)) {
684 if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio));
685 else PerlLIO_close(fd[0]);
686 if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio));
687 else PerlLIO_close(fd[1]);
691 sv_setsv(sv,&PL_sv_yes);
695 sv_setsv(sv,&PL_sv_undef);
700 /* explicit renamed to avoid C++ conflict -- kja */
702 Perl_do_close(pTHX_ GV *gv, bool not_implicit)
709 if (!gv || SvTYPE(gv) != SVt_PVGV) {
711 SETERRNO(EBADF,SS$_IVCHAN);
715 if (!io) { /* never opened */
718 if (ckWARN(WARN_UNOPENED))
719 Perl_warner(aTHX_ WARN_UNOPENED,
720 "Close on unopened file <%s>",GvENAME(gv));
721 SETERRNO(EBADF,SS$_IVCHAN);
725 retval = io_close(io, not_implicit);
729 IoLINES_LEFT(io) = IoPAGE_LEN(io);
736 Perl_io_close(pTHX_ IO *io, bool not_implicit)
742 if (IoTYPE(io) == '|') {
743 status = PerlProc_pclose(IoIFP(io));
745 STATUS_NATIVE_SET(status);
746 retval = (STATUS_POSIX == 0);
749 retval = (status != -1);
752 else if (IoTYPE(io) == '-')
755 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
756 retval = (PerlIO_close(IoOFP(io)) != EOF);
757 PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
760 retval = (PerlIO_close(IoIFP(io)) != EOF);
762 IoOFP(io) = IoIFP(io) = Nullfp;
764 else if (not_implicit) {
765 SETERRNO(EBADF,SS$_IVCHAN);
772 Perl_do_eof(pTHX_ GV *gv)
782 else if (ckWARN(WARN_IO)
783 && (IoTYPE(io) == '>' || IoIFP(io) == PerlIO_stdout()
784 || IoIFP(io) == PerlIO_stderr()))
786 SV* sv = sv_newmortal();
787 gv_efullname3(sv, gv, Nullch);
788 Perl_warner(aTHX_ WARN_IO, "Filehandle %s opened only for output",
794 if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
795 if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
796 return FALSE; /* this is the most usual case */
799 ch = PerlIO_getc(IoIFP(io));
801 (void)PerlIO_ungetc(IoIFP(io),ch);
804 if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
805 if (PerlIO_get_cnt(IoIFP(io)) < -1)
806 PerlIO_set_cnt(IoIFP(io),-1);
808 if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
809 if (!nextargv(PL_argvgv)) /* get another fp handy */
813 return TRUE; /* normal fp, definitely end of file */
819 Perl_do_tell(pTHX_ GV *gv)
824 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
825 #ifdef ULTRIX_STDIO_BOTCH
827 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
829 return PerlIO_tell(fp);
833 if (ckWARN(WARN_UNOPENED))
834 Perl_warner(aTHX_ WARN_UNOPENED, "tell() on unopened file");
836 SETERRNO(EBADF,RMS$_IFI);
841 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
846 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
847 #ifdef ULTRIX_STDIO_BOTCH
849 (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */
851 return PerlIO_seek(fp, pos, whence) >= 0;
855 if (ckWARN(WARN_UNOPENED))
856 Perl_warner(aTHX_ WARN_UNOPENED, "seek() on unopened file");
858 SETERRNO(EBADF,RMS$_IFI);
863 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
868 if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))
869 return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence);
872 if (ckWARN(WARN_UNOPENED))
873 Perl_warner(aTHX_ WARN_UNOPENED, "sysseek() on unopened file");
875 SETERRNO(EBADF,RMS$_IFI);
880 Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int flag)
883 Perl_croak(aTHX_ "panic: unsetting binmode"); /* Not implemented yet */
885 #if defined(atarist) || defined(__MINT__)
886 if (!PerlIO_flush(fp) && (fp->_flag |= _IOBIN))
891 if (PerlLIO_setmode(PerlIO_fileno(fp), OP_BINARY) != -1) {
892 #if defined(WIN32) && defined(__BORLANDC__)
893 /* The translation mode of the stream is maintained independent
894 * of the translation mode of the fd in the Borland RTL (heavy
895 * digging through their runtime sources reveal). User has to
896 * set the mode explicitly for the stream (though they don't
897 * document this anywhere). GSAR 97-5-24
899 PerlIO_seek(fp,0L,0);
900 ((FILE*)fp)->flags |= _F_BIN;
908 #if defined(USEMYBINMODE)
909 if (my_binmode(fp,iotype) != FALSE)
919 #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
920 /* code courtesy of William Kucharski */
923 I32 my_chsize(fd, length)
924 I32 fd; /* file descriptor */
925 Off_t length; /* length to set file to */
930 if (PerlLIO_fstat(fd, &filebuf) < 0)
933 if (filebuf.st_size < length) {
935 /* extend file length */
937 if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
940 /* write a "0" byte */
942 if ((PerlLIO_write(fd, "", 1)) != 1)
946 /* truncate length */
951 fl.l_type = F_WRLCK; /* write lock on file space */
954 * This relies on the UNDOCUMENTED F_FREESP argument to
955 * fcntl(2), which truncates the file so that it ends at the
956 * position indicated by fl.l_start.
958 * Will minor miracles never cease?
961 if (fcntl(fd, F_FREESP, &fl) < 0)
968 #endif /* F_FREESP */
971 Perl_do_print(pTHX_ register SV *sv, PerlIO *fp)
976 /* assuming fp is checked earlier */
982 if (SvIOK(sv) && SvIVX(sv) != 0) {
983 PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv));
984 return !PerlIO_error(fp);
986 if ( (SvNOK(sv) && SvNVX(sv) != 0.0)
987 || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) {
988 PerlIO_printf(fp, PL_ofmt, SvNVX(sv));
989 return !PerlIO_error(fp);
992 switch (SvTYPE(sv)) {
996 if (ckWARN(WARN_UNINITIALIZED))
997 Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit);
1004 if (SvIsUV(sv)) /* XXXX 64-bit? */
1005 PerlIO_printf(fp, "%lu", (unsigned long)SvUVX(sv));
1007 PerlIO_printf(fp, "%ld", (long)SvIVX(sv));
1008 return !PerlIO_error(fp);
1012 tmps = SvPV(sv, len);
1015 if (len && (PerlIO_write(fp,tmps,len) == 0 || PerlIO_error(fp)))
1017 return !PerlIO_error(fp);
1027 if (PL_op->op_flags & OPf_REF) {
1029 tmpgv = cGVOP->op_gv;
1032 if (io && IoIFP(io)) {
1034 sv_setpv(PL_statname,"");
1035 PL_laststype = OP_STAT;
1036 return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache));
1039 if (tmpgv == PL_defgv)
1040 return PL_laststatval;
1041 if (ckWARN(WARN_UNOPENED))
1042 Perl_warner(aTHX_ WARN_UNOPENED, "Stat on unopened file <%s>",
1045 sv_setpv(PL_statname,"");
1046 return (PL_laststatval = -1);
1054 if (SvTYPE(sv) == SVt_PVGV) {
1058 else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) {
1059 tmpgv = (GV*)SvRV(sv);
1065 sv_setpv(PL_statname, s);
1066 PL_laststype = OP_STAT;
1067 PL_laststatval = PerlLIO_stat(s, &PL_statcache);
1068 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n'))
1069 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat");
1070 return PL_laststatval;
1080 if (PL_op->op_flags & OPf_REF) {
1082 if (cGVOP->op_gv == PL_defgv) {
1083 if (PL_laststype != OP_LSTAT)
1084 Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat");
1085 return PL_laststatval;
1087 Perl_croak(aTHX_ "You can't use -l on a filehandle");
1090 PL_laststype = OP_LSTAT;
1094 sv_setpv(PL_statname,SvPV(sv, n_a));
1095 PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache);
1096 if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n'))
1097 Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat");
1098 return PL_laststatval;
1102 Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp)
1104 return do_aexec5(really, mark, sp, 0, 0);
1108 Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp,
1109 int fd, int do_report)
1117 New(401,PL_Argv, sp - mark + 1, char*);
1119 while (++mark <= sp) {
1121 *a++ = SvPVx(*mark, n_a);
1126 if (*PL_Argv[0] != '/') /* will execvp use PATH? */
1127 TAINT_ENV(); /* testing IFS here is overkill, probably */
1128 if (really && *(tmps = SvPV(really, n_a)))
1129 PerlProc_execvp(tmps,PL_Argv);
1131 PerlProc_execvp(PL_Argv[0],PL_Argv);
1132 if (ckWARN(WARN_EXEC))
1133 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1134 PL_Argv[0], Strerror(errno));
1138 PerlLIO_write(fd, (void*)&e, sizeof(int));
1147 Perl_do_execfree(pTHX)
1151 PL_Argv = Null(char **);
1159 #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC)
1162 Perl_do_exec(pTHX_ char *cmd)
1164 return do_exec3(cmd,0,0);
1168 Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report)
1174 while (*cmd && isSPACE(*cmd))
1177 /* save an extra exec if possible */
1180 if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) {
1182 s = cmd+PL_cshlen+3;
1196 if (s[-1] == '\'') {
1198 PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0);
1206 /* see if there are shell metacharacters in it */
1208 if (*cmd == '.' && isSPACE(cmd[1]))
1211 if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4]))
1214 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
1218 for (s = cmd; *s; s++) {
1219 if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1220 if (*s == '\n' && !s[1]) {
1224 /* handle the 2>&1 construct at the end */
1225 if (*s == '>' && s[1] == '&' && s[2] == '1'
1226 && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
1227 && (!s[3] || isSPACE(s[3])))
1231 while (*t && isSPACE(*t))
1233 if (!*t && (dup2(1,2) != -1)) {
1239 PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0);
1244 New(402,PL_Argv, (s - cmd) / 2 + 2, char*);
1245 PL_Cmd = savepvn(cmd, s-cmd);
1247 for (s = PL_Cmd; *s;) {
1248 while (*s && isSPACE(*s)) s++;
1251 while (*s && !isSPACE(*s)) s++;
1257 PerlProc_execvp(PL_Argv[0],PL_Argv);
1258 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1266 if (ckWARN(WARN_EXEC))
1267 Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s",
1268 PL_Argv[0], Strerror(errno));
1270 PerlLIO_write(fd, (void*)&e, sizeof(int));
1279 #endif /* OS2 || WIN32 */
1282 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp)
1287 register I32 tot = 0;
1290 SV **oldmark = mark;
1293 #define APPLY_TAINT_PROPER() \
1295 if (PL_tainted) { TAINT_PROPER(what); } \
1298 /* This is a first heuristic; it doesn't catch tainting magic. */
1300 while (++mark <= sp) {
1301 if (SvTAINTED(*mark)) {
1311 APPLY_TAINT_PROPER();
1314 APPLY_TAINT_PROPER();
1316 while (++mark <= sp) {
1317 char *name = SvPVx(*mark, n_a);
1318 APPLY_TAINT_PROPER();
1319 if (PerlLIO_chmod(name, val))
1327 APPLY_TAINT_PROPER();
1328 if (sp - mark > 2) {
1329 val = SvIVx(*++mark);
1330 val2 = SvIVx(*++mark);
1331 APPLY_TAINT_PROPER();
1333 while (++mark <= sp) {
1334 char *name = SvPVx(*mark, n_a);
1335 APPLY_TAINT_PROPER();
1336 if (PerlLIO_chown(name, val, val2))
1343 XXX Should we make lchown() directly available from perl?
1344 For now, we'll let Configure test for HAS_LCHOWN, but do
1345 nothing in the core.
1351 APPLY_TAINT_PROPER();
1354 s = SvPVx(*++mark, n_a);
1356 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
1358 if (!(val = whichsig(s)))
1359 Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s);
1363 APPLY_TAINT_PROPER();
1366 /* kill() doesn't do process groups (job trees?) under VMS */
1367 if (val < 0) val = -val;
1368 if (val == SIGKILL) {
1369 # include <starlet.h>
1370 /* Use native sys$delprc() to insure that target process is
1371 * deleted; supervisor-mode images don't pay attention to
1372 * CRTL's emulation of Unix-style signals and kill()
1374 while (++mark <= sp) {
1375 I32 proc = SvIVx(*mark);
1376 register unsigned long int __vmssts;
1377 APPLY_TAINT_PROPER();
1378 if (!((__vmssts = sys$delprc(&proc,0)) & 1)) {
1382 case SS$_NOSUCHNODE:
1383 SETERRNO(ESRCH,__vmssts);
1386 SETERRNO(EPERM,__vmssts);
1389 SETERRNO(EVMSERR,__vmssts);
1398 while (++mark <= sp) {
1399 I32 proc = SvIVx(*mark);
1400 APPLY_TAINT_PROPER();
1402 if (PerlProc_killpg(proc,val)) /* BSD */
1404 if (PerlProc_kill(-proc,val)) /* SYSV */
1410 while (++mark <= sp) {
1411 I32 proc = SvIVx(*mark);
1412 APPLY_TAINT_PROPER();
1413 if (PerlProc_kill(proc, val))
1421 APPLY_TAINT_PROPER();
1423 while (++mark <= sp) {
1424 s = SvPVx(*mark, n_a);
1425 APPLY_TAINT_PROPER();
1426 if (PL_euid || PL_unsafe) {
1430 else { /* don't let root wipe out directories without -U */
1431 if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))
1443 APPLY_TAINT_PROPER();
1444 if (sp - mark > 2) {
1445 #if defined(I_UTIME) || defined(VMS)
1446 struct utimbuf utbuf;
1454 Zero(&utbuf, sizeof utbuf, char);
1456 utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */
1457 utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */
1459 utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */
1460 utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */
1462 APPLY_TAINT_PROPER();
1464 while (++mark <= sp) {
1465 char *name = SvPVx(*mark, n_a);
1466 APPLY_TAINT_PROPER();
1467 if (PerlLIO_utime(name, &utbuf))
1478 #undef APPLY_TAINT_PROPER
1481 /* Do the permissions allow some operation? Assumes statcache already set. */
1482 #ifndef VMS /* VMS' cando is in vms.c */
1484 Perl_cando(pTHX_ I32 bit, I32 effective, register struct stat *statbufp)
1487 /* [Comments and code from Len Reed]
1488 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
1489 * to write-protected files. The execute permission bit is set
1490 * by the Miscrosoft C library stat() function for the following:
1495 * All files and directories are readable.
1496 * Directories and special files, e.g. "CON", cannot be
1498 * [Comment by Tom Dinger -- a directory can have the write-protect
1499 * bit set in the file system, but DOS permits changes to
1500 * the directory anyway. In addition, all bets are off
1501 * here for networked software, such as Novell and
1505 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
1506 * too so it will actually look into the files for magic numbers
1508 return (bit & statbufp->st_mode) ? TRUE : FALSE;
1510 #else /* ! DOSISH */
1511 if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */
1512 if (bit == S_IXUSR) {
1513 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
1517 return TRUE; /* root reads and writes anything */
1520 if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) {
1521 if (statbufp->st_mode & bit)
1522 return TRUE; /* ok as "user" */
1524 else if (ingroup((I32)statbufp->st_gid,effective)) {
1525 if (statbufp->st_mode & bit >> 3)
1526 return TRUE; /* ok as "group" */
1528 else if (statbufp->st_mode & bit >> 6)
1529 return TRUE; /* ok as "other" */
1531 #endif /* ! DOSISH */
1536 Perl_ingroup(pTHX_ I32 testgid, I32 effective)
1538 if (testgid == (effective ? PL_egid : PL_gid))
1540 #ifdef HAS_GETGROUPS
1545 Groups_t gary[NGROUPS];
1548 anum = getgroups(NGROUPS,gary);
1550 if (gary[anum] == testgid)
1557 #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
1560 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
1566 key = (key_t)SvNVx(*++mark);
1567 n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark);
1568 flags = SvIVx(*++mark);
1574 return msgget(key, flags);
1578 return semget(key, n, flags);
1582 return shmget(key, n, flags);
1584 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1586 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1589 return -1; /* should never happen */
1593 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
1598 I32 id, n, cmd, infosize, getinfo;
1601 id = SvIVx(*++mark);
1602 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
1603 cmd = SvIVx(*++mark);
1606 getinfo = (cmd == IPC_STAT);
1612 if (cmd == IPC_STAT || cmd == IPC_SET)
1613 infosize = sizeof(struct msqid_ds);
1618 if (cmd == IPC_STAT || cmd == IPC_SET)
1619 infosize = sizeof(struct shmid_ds);
1625 if (cmd == IPC_STAT || cmd == IPC_SET)
1626 infosize = sizeof(struct semid_ds);
1627 else if (cmd == GETALL || cmd == SETALL)
1629 struct semid_ds semds;
1633 getinfo = (cmd == GETALL);
1634 if (Semctl(id, 0, IPC_STAT, semun) == -1)
1636 infosize = semds.sem_nsems * sizeof(short);
1637 /* "short" is technically wrong but much more portable
1638 than guessing about u_?short(_t)? */
1641 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1645 #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
1647 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1656 SvPV_force(astr, len);
1657 a = SvGROW(astr, infosize+1);
1661 a = SvPV(astr, len);
1662 if (len != infosize)
1663 Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
1672 a = (char *)i; /* ouch */
1679 ret = msgctl(id, cmd, (struct msqid_ds *)a);
1685 union semun unsemds;
1687 unsemds.buf = (struct semid_ds *)a;
1688 ret = Semctl(id, n, cmd, unsemds);
1690 Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
1697 ret = shmctl(id, cmd, (struct shmid_ds *)a);
1701 if (getinfo && ret >= 0) {
1702 SvCUR_set(astr, infosize);
1703 *SvEND(astr) = '\0';
1710 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
1716 I32 id, msize, flags;
1719 id = SvIVx(*++mark);
1721 flags = SvIVx(*++mark);
1722 mbuf = SvPV(mstr, len);
1723 if ((msize = len - sizeof(long)) < 0)
1724 Perl_croak(aTHX_ "Arg too short for msgsnd");
1726 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
1728 Perl_croak(aTHX_ "msgsnd not implemented");
1733 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
1740 I32 id, msize, flags, ret;
1743 id = SvIVx(*++mark);
1745 msize = SvIVx(*++mark);
1746 mtype = (long)SvIVx(*++mark);
1747 flags = SvIVx(*++mark);
1748 SvPV_force(mstr, len);
1749 mbuf = SvGROW(mstr, sizeof(long)+msize+1);
1752 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
1754 SvCUR_set(mstr, sizeof(long)+ret);
1755 *SvEND(mstr) = '\0';
1759 Perl_croak(aTHX_ "msgrcv not implemented");
1764 Perl_do_semop(pTHX_ SV **mark, SV **sp)
1773 id = SvIVx(*++mark);
1775 opbuf = SvPV(opstr, opsize);
1776 if (opsize < sizeof(struct sembuf)
1777 || (opsize % sizeof(struct sembuf)) != 0) {
1778 SETERRNO(EINVAL,LIB$_INVARG);
1782 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
1784 Perl_croak(aTHX_ "semop not implemented");
1789 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
1795 I32 id, mpos, msize;
1797 struct shmid_ds shmds;
1799 id = SvIVx(*++mark);
1801 mpos = SvIVx(*++mark);
1802 msize = SvIVx(*++mark);
1804 if (shmctl(id, IPC_STAT, &shmds) == -1)
1806 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
1807 SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */
1810 shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
1811 if (shm == (char *)-1) /* I hate System V IPC, I really do */
1813 if (optype == OP_SHMREAD) {
1814 SvPV_force(mstr, len);
1815 mbuf = SvGROW(mstr, msize+1);
1817 Copy(shm + mpos, mbuf, msize, char);
1818 SvCUR_set(mstr, msize);
1819 *SvEND(mstr) = '\0';
1825 mbuf = SvPV(mstr, len);
1826 if ((n = len) > msize)
1828 Copy(mbuf, shm + mpos, n, char);
1830 memzero(shm + mpos + n, msize - n);
1834 Perl_croak(aTHX_ "shm I/O not implemented");
1838 #endif /* SYSV IPC */