3 * Copyright (C) 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 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
140 #if defined(USE_5005THREADS)
141 # define INIT_TLS_AND_INTERP \
143 if (!PL_curinterp) { \
144 PERL_SET_INTERP(my_perl); \
150 # if defined(USE_ITHREADS)
151 # define INIT_TLS_AND_INTERP \
153 if (!PL_curinterp) { \
154 PERL_SET_INTERP(my_perl); \
157 PERL_SET_THX(my_perl); \
159 MUTEX_INIT(&PL_dollarzero_mutex); \
162 PERL_SET_THX(my_perl); \
166 # define INIT_TLS_AND_INTERP \
168 if (!PL_curinterp) { \
169 PERL_SET_INTERP(my_perl); \
171 PERL_SET_THX(my_perl); \
176 #ifdef PERL_IMPLICIT_SYS
178 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
179 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
180 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
181 struct IPerlDir* ipD, struct IPerlSock* ipS,
182 struct IPerlProc* ipP)
184 PerlInterpreter *my_perl;
185 /* Newx() needs interpreter, so call malloc() instead */
186 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
188 Zero(my_perl, 1, PerlInterpreter);
204 =head1 Embedding Functions
206 =for apidoc perl_alloc
208 Allocates a new Perl interpreter. See L<perlembed>.
216 PerlInterpreter *my_perl;
217 #ifdef USE_5005THREADS
221 /* Newx() needs interpreter, so call malloc() instead */
222 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
225 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
227 #endif /* PERL_IMPLICIT_SYS */
230 =for apidoc perl_construct
232 Initializes a new Perl interpreter. See L<perlembed>.
238 perl_construct(pTHXx)
240 #ifdef USE_5005THREADS
242 struct perl_thread *thr = NULL;
243 #endif /* FAKE_THREADS */
244 #endif /* USE_5005THREADS */
246 PERL_UNUSED_ARG(my_perl);
249 PL_perl_destruct_level = 1;
251 if (PL_perl_destruct_level > 0)
254 /* Init the real globals (and main thread)? */
256 #ifdef USE_5005THREADS
257 MUTEX_INIT(&PL_sv_mutex);
259 * Safe to use basic SV functions from now on (though
260 * not things like mortals or tainting yet).
262 MUTEX_INIT(&PL_eval_mutex);
263 COND_INIT(&PL_eval_cond);
264 MUTEX_INIT(&PL_threads_mutex);
265 COND_INIT(&PL_nthreads_cond);
266 # ifdef EMULATE_ATOMIC_REFCOUNTS
267 MUTEX_INIT(&PL_svref_mutex);
268 # endif /* EMULATE_ATOMIC_REFCOUNTS */
270 MUTEX_INIT(&PL_cred_mutex);
271 MUTEX_INIT(&PL_sv_lock_mutex);
272 MUTEX_INIT(&PL_fdpid_mutex);
274 thr = init_main_thread();
275 #endif /* USE_5005THREADS */
277 #ifdef PERL_FLEXIBLE_EXCEPTIONS
278 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
281 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
283 PL_linestr = NEWSV(65,79);
284 sv_upgrade(PL_linestr,SVt_PVIV);
286 if (!SvREADONLY(&PL_sv_undef)) {
287 /* set read-only and try to insure than we wont see REFCNT==0
290 SvREADONLY_on(&PL_sv_undef);
291 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
293 sv_setpv(&PL_sv_no,PL_No);
294 /* value lookup in void context - happens to have the side effect
295 of caching the numeric forms. */
298 SvREADONLY_on(&PL_sv_no);
299 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
301 sv_setpv(&PL_sv_yes,PL_Yes);
304 SvREADONLY_on(&PL_sv_yes);
305 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
307 SvREADONLY_on(&PL_sv_placeholder);
308 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
311 PL_sighandlerp = Perl_sighandler;
312 PL_pidstatus = newHV();
315 PL_rs = newSVpvn("\n", 1);
320 PL_lex_state = LEX_NOTPARSING;
326 SET_NUMERIC_STANDARD();
330 PL_patchlevel = NEWSV(0,4);
331 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
332 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
333 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
334 s = (U8*)SvPVX(PL_patchlevel);
335 /* Build version strings using "native" characters */
336 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
337 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
338 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
340 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
341 SvPOK_on(PL_patchlevel);
342 SvNVX(PL_patchlevel) = (NV)PERL_REVISION +
343 ((NV)PERL_VERSION / (NV)1000) +
344 ((NV)PERL_SUBVERSION / (NV)1000000);
345 SvNOK_on(PL_patchlevel); /* dual valued */
346 SvUTF8_on(PL_patchlevel);
347 SvREADONLY_on(PL_patchlevel);
350 #if defined(LOCAL_PATCH_COUNT)
351 PL_localpatches = (char **) local_patches; /* For possible -v */
354 #ifdef HAVE_INTERP_INTERN
358 PerlIO_init(aTHX); /* Hook to IO system */
360 PL_fdpid = newAV(); /* for remembering popen pids by fd */
361 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
362 PL_errors = newSVpvn("",0);
363 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
364 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
365 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
367 PL_regex_padav = newAV();
368 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
369 PL_regex_pad = AvARRAY(PL_regex_padav);
371 #ifdef USE_REENTRANT_API
372 Perl_reentrant_init(aTHX);
375 /* Note that strtab is a rather special HV. Assumptions are made
376 about not iterating on it, and not adding tie magic to it.
377 It is properly deallocated in perl_destruct() */
380 #ifdef USE_5005THREADS
381 MUTEX_INIT(&PL_strtab_mutex);
383 HvSHAREKEYS_off(PL_strtab); /* mandatory */
384 hv_ksplit(PL_strtab, 512);
386 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
387 _dyld_lookup_and_bind
388 ("__environ", (unsigned long *) &environ_pointer, NULL);
392 # ifdef USE_ENVIRON_ARRAY
393 PL_origenviron = environ;
397 /* Use sysconf(_SC_CLK_TCK) if available, if not
398 * available or if the sysconf() fails, use the HZ.
399 * BeOS has those, but returns the wrong value.
400 * The HZ if not originally defined has been by now
401 * been defined as CLK_TCK, if available. */
402 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
403 PL_clocktick = sysconf(_SC_CLK_TCK);
404 if (PL_clocktick <= 0)
408 PL_stashcache = newHV();
414 =for apidoc nothreadhook
416 Stub that provides thread hook for perl_destruct when there are
423 Perl_nothreadhook(pTHX)
428 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
430 Perl_dump_sv_child(pTHX_ SV *sv)
433 const int sock = PL_dumper_fd;
434 const int debug_fd = PerlIO_fileno(Perl_debug_log);
435 union control_un control;
438 struct cmsghdr *cmptr;
440 unsigned char buffer[256];
442 if(sock == -1 || debug_fd == -1)
445 PerlIO_flush(Perl_debug_log);
447 /* All these shenanigans are to pass a file descriptor over to our child for
448 it to dump out to. We can't let it hold open the file descriptor when it
449 forks, as the file descriptor it will dump to can turn out to be one end
450 of pipe that some other process will wait on for EOF. (So as it would
451 be open, the wait would be forever. */
453 msg.msg_control = control.control;
454 msg.msg_controllen = sizeof(control.control);
455 /* We're a connected socket so we don't need a destination */
461 cmptr = CMSG_FIRSTHDR(&msg);
462 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
463 cmptr->cmsg_level = SOL_SOCKET;
464 cmptr->cmsg_type = SCM_RIGHTS;
465 *((int *)CMSG_DATA(cmptr)) = 1;
467 vec[0].iov_base = (void*)&sv;
468 vec[0].iov_len = sizeof(sv);
469 got = sendmsg(sock, &msg, 0);
472 perror("Debug leaking scalars parent sendmsg failed");
475 if(got < sizeof(sv)) {
476 perror("Debug leaking scalars parent short sendmsg");
480 /* Return protocol is
482 unsigned char: length of location string (0 for empty)
483 unsigned char*: string (not terminated)
485 vec[0].iov_base = (void*)&returned_errno;
486 vec[0].iov_len = sizeof(returned_errno);
487 vec[1].iov_base = buffer;
490 got = readv(sock, vec, 2);
493 perror("Debug leaking scalars parent read failed");
494 PerlIO_flush(PerlIO_stderr());
497 if(got < sizeof(returned_errno) + 1) {
498 perror("Debug leaking scalars parent short read");
499 PerlIO_flush(PerlIO_stderr());
504 got = read(sock, buffer + 1, *buffer);
506 perror("Debug leaking scalars parent read 2 failed");
507 PerlIO_flush(PerlIO_stderr());
512 perror("Debug leaking scalars parent short read 2");
513 PerlIO_flush(PerlIO_stderr());
518 if (returned_errno || *buffer) {
519 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
520 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
521 returned_errno, strerror(returned_errno));
527 =for apidoc perl_destruct
529 Shuts down a Perl interpreter. See L<perlembed>.
537 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
539 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
542 #ifdef USE_5005THREADS
545 #endif /* USE_5005THREADS */
547 PERL_UNUSED_ARG(my_perl);
549 /* wait for all pseudo-forked children to finish */
550 PERL_WAIT_FOR_CHILDREN;
552 #ifdef USE_5005THREADS
554 /* Pass 1 on any remaining threads: detach joinables, join zombies */
556 MUTEX_LOCK(&PL_threads_mutex);
557 DEBUG_S(PerlIO_printf(Perl_debug_log,
558 "perl_destruct: waiting for %d threads...\n",
560 for (t = thr->next; t != thr; t = t->next) {
561 MUTEX_LOCK(&t->mutex);
562 switch (ThrSTATE(t)) {
565 DEBUG_S(PerlIO_printf(Perl_debug_log,
566 "perl_destruct: joining zombie %p\n", t));
567 ThrSETSTATE(t, THRf_DEAD);
568 MUTEX_UNLOCK(&t->mutex);
571 * The SvREFCNT_dec below may take a long time (e.g. av
572 * may contain an object scalar whose destructor gets
573 * called) so we have to unlock threads_mutex and start
576 MUTEX_UNLOCK(&PL_threads_mutex);
578 SvREFCNT_dec((SV*)av);
579 DEBUG_S(PerlIO_printf(Perl_debug_log,
580 "perl_destruct: joined zombie %p OK\n", t));
582 case THRf_R_JOINABLE:
583 DEBUG_S(PerlIO_printf(Perl_debug_log,
584 "perl_destruct: detaching thread %p\n", t));
585 ThrSETSTATE(t, THRf_R_DETACHED);
587 * We unlock threads_mutex and t->mutex in the opposite order
588 * from which we locked them just so that DETACH won't
589 * deadlock if it panics. It's only a breach of good style
590 * not a bug since they are unlocks not locks.
592 MUTEX_UNLOCK(&PL_threads_mutex);
594 MUTEX_UNLOCK(&t->mutex);
597 DEBUG_S(PerlIO_printf(Perl_debug_log,
598 "perl_destruct: ignoring %p (state %u)\n",
600 MUTEX_UNLOCK(&t->mutex);
601 /* fall through and out */
604 /* We leave the above "Pass 1" loop with threads_mutex still locked */
606 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
607 while (PL_nthreads > 1)
609 DEBUG_S(PerlIO_printf(Perl_debug_log,
610 "perl_destruct: final wait for %d threads\n",
612 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
614 /* At this point, we're the last thread */
615 MUTEX_UNLOCK(&PL_threads_mutex);
616 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
617 MUTEX_DESTROY(&PL_threads_mutex);
618 COND_DESTROY(&PL_nthreads_cond);
620 #endif /* !defined(FAKE_THREADS) */
621 #endif /* USE_5005THREADS */
623 destruct_level = PL_perl_destruct_level;
626 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
628 const int i = atoi(s);
629 if (destruct_level < i)
635 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
641 if (PL_endav && !PL_minus_c)
642 call_list(PL_scopestack_ix, PL_endav);
648 /* Need to flush since END blocks can produce output */
651 if (CALL_FPTR(PL_threadhook)(aTHX)) {
652 /* Threads hook has vetoed further cleanup */
653 return STATUS_NATIVE_EXPORT;
656 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
657 if (destruct_level != 0) {
658 /* Fork here to create a child. Our child's job is to preserve the
659 state of scalars prior to destruction, so that we can instruct it
660 to dump any scalars that we later find have leaked.
661 There's no subtlety in this code - it assumes POSIX, and it doesn't
665 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
666 perror("Debug leaking scalars socketpair failed");
672 perror("Debug leaking scalars fork failed");
676 /* We are the child */
677 const int sock = fd[1];
678 const int debug_fd = PerlIO_fileno(Perl_debug_log);
681 /* Our success message is an integer 0, and a char 0 */
682 static const char success[sizeof(int) + 1];
686 /* We need to close all other file descriptors otherwise we end up
687 with interesting hangs, where the parent closes its end of a
688 pipe, and sits waiting for (another) child to terminate. Only
689 that child never terminates, because it never gets EOF, because
690 we also have the far end of the pipe open. We even need to
691 close the debugging fd, because sometimes it happens to be one
692 end of a pipe, and a process is waiting on the other end for
693 EOF. Normally it would be closed at some point earlier in
694 destruction, but if we happen to cause the pipe to remain open,
695 EOF never occurs, and we get an infinite hang. Hence all the
696 games to pass in a file descriptor if it's actually needed. */
698 f = sysconf(_SC_OPEN_MAX);
700 where = "sysconf failed";
711 union control_un control;
714 struct cmsghdr *cmptr;
718 msg.msg_control = control.control;
719 msg.msg_controllen = sizeof(control.control);
720 /* We're a connected socket so we don't need a source */
724 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
726 vec[0].iov_base = (void*)⌖
727 vec[0].iov_len = sizeof(target);
729 got = recvmsg(sock, &msg, 0);
734 where = "recv failed";
737 if(got < sizeof(target)) {
738 where = "short recv";
742 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
746 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
747 where = "wrong cmsg_len";
750 if(cmptr->cmsg_level != SOL_SOCKET) {
751 where = "wrong cmsg_level";
754 if(cmptr->cmsg_type != SCM_RIGHTS) {
755 where = "wrong cmsg_type";
759 got_fd = *(int*)CMSG_DATA(cmptr);
760 /* For our last little bit of trickery, put the file descriptor
761 back into Perl_debug_log, as if we never actually closed it
763 if(got_fd != debug_fd) {
764 if (dup2(got_fd, debug_fd) == -1) {
771 PerlIO_flush(Perl_debug_log);
773 got = write(sock, &success, sizeof(success));
776 where = "write failed";
779 if(got < sizeof(success)) {
780 where = "short write";
787 int send_errno = errno;
788 unsigned char length = (unsigned char) strlen(where);
789 struct iovec failure[3] = {
790 {(void*)&send_errno, sizeof(send_errno)},
792 {(void*)where, length}
794 int got = writev(sock, failure, 3);
795 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
796 in the parent if we try to read from the socketpair after the
797 child has exited, even if there was data to read.
798 So sleep a bit to give the parent a fighting chance of
801 _exit((got == -1) ? errno : 0);
805 PL_dumper_fd = fd[0];
810 /* We must account for everything. */
812 /* Destroy the main CV and syntax tree */
813 /* Do this now, because destroying ops can cause new SVs to be generated
814 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
815 PL_curcop to point to a valid op from which the filename structure
817 PL_curcop = &PL_compiling;
819 /* ensure comppad/curpad to refer to main's pad */
820 if (CvPADLIST(PL_main_cv)) {
821 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
823 op_free(PL_main_root);
824 PL_main_root = Nullop;
826 PL_main_start = Nullop;
827 SvREFCNT_dec(PL_main_cv);
831 /* Tell PerlIO we are about to tear things apart in case
832 we have layers which are using resources that should
836 PerlIO_destruct(aTHX);
838 if (PL_sv_objcount) {
840 * Try to destruct global references. We do this first so that the
841 * destructors and destructees still exist. Some sv's might remain.
842 * Non-referenced objects are on their own.
846 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
847 PL_defoutgv = Nullgv; /* may have been freed */
850 /* unhook hooks which will soon be, or use, destroyed data */
851 SvREFCNT_dec(PL_warnhook);
852 PL_warnhook = Nullsv;
853 SvREFCNT_dec(PL_diehook);
856 /* call exit list functions */
857 while (PL_exitlistlen-- > 0)
858 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
860 Safefree(PL_exitlist);
865 if (destruct_level == 0){
867 DEBUG_P(debprofdump());
869 #if defined(PERLIO_LAYERS)
870 /* No more IO - including error messages ! */
871 PerlIO_cleanup(aTHX);
874 /* The exit() function will do everything that needs doing. */
875 return STATUS_NATIVE_EXPORT;
878 /* jettison our possibly duplicated environment */
879 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
880 * so we certainly shouldn't free it here
883 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
884 if (environ != PL_origenviron && !PL_use_safe_putenv
886 /* only main thread can free environ[0] contents */
887 && PL_curinterp == aTHX
893 for (i = 0; environ[i]; i++)
894 safesysfree(environ[i]);
896 /* Must use safesysfree() when working with environ. */
897 safesysfree(environ);
899 environ = PL_origenviron;
902 #endif /* !PERL_MICRO */
904 /* reset so print() ends up where we expect */
908 /* the syntax tree is shared between clones
909 * so op_free(PL_main_root) only ReREFCNT_dec's
910 * REGEXPs in the parent interpreter
911 * we need to manually ReREFCNT_dec for the clones
914 I32 i = AvFILLp(PL_regex_padav) + 1;
915 SV **ary = AvARRAY(PL_regex_padav);
920 if (SvFLAGS(resv) & SVf_BREAK) {
921 /* this is PL_reg_curpm, already freed
922 * flag is set in regexec.c:S_regtry
924 SvFLAGS(resv) &= ~SVf_BREAK;
926 else if(SvREPADTMP(resv)) {
927 SvREPADTMP_off(resv);
929 else if(SvIOKp(resv)) {
930 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
935 SvREFCNT_dec(PL_regex_padav);
936 PL_regex_padav = Nullav;
940 SvREFCNT_dec((SV*) PL_stashcache);
941 PL_stashcache = NULL;
943 /* loosen bonds of global variables */
946 (void)PerlIO_close(PL_rsfp);
950 /* Filters for program text */
951 SvREFCNT_dec(PL_rsfp_filters);
952 PL_rsfp_filters = Nullav;
955 PL_preprocess = FALSE;
961 PL_doswitches = FALSE;
962 PL_dowarn = G_WARN_OFF;
963 PL_doextract = FALSE;
964 PL_sawampersand = FALSE; /* must save all match strings */
967 Safefree(PL_inplace);
969 SvREFCNT_dec(PL_patchlevel);
972 SvREFCNT_dec(PL_e_script);
973 PL_e_script = Nullsv;
978 /* magical thingies */
980 SvREFCNT_dec(PL_ofs_sv); /* $, */
983 SvREFCNT_dec(PL_ors_sv); /* $\ */
986 SvREFCNT_dec(PL_rs); /* $/ */
989 PL_multiline = 0; /* $* */
990 Safefree(PL_osname); /* $^O */
993 SvREFCNT_dec(PL_statname);
994 PL_statname = Nullsv;
997 /* defgv, aka *_ should be taken care of elsewhere */
999 /* clean up after study() */
1000 SvREFCNT_dec(PL_lastscream);
1001 PL_lastscream = Nullsv;
1002 Safefree(PL_screamfirst);
1004 Safefree(PL_screamnext);
1008 Safefree(PL_efloatbuf);
1009 PL_efloatbuf = Nullch;
1012 /* startup and shutdown function lists */
1013 SvREFCNT_dec(PL_beginav);
1014 SvREFCNT_dec(PL_beginav_save);
1015 SvREFCNT_dec(PL_endav);
1016 SvREFCNT_dec(PL_checkav);
1017 SvREFCNT_dec(PL_checkav_save);
1018 SvREFCNT_dec(PL_initav);
1019 PL_beginav = Nullav;
1020 PL_beginav_save = Nullav;
1022 PL_checkav = Nullav;
1023 PL_checkav_save = Nullav;
1026 /* shortcuts just get cleared */
1032 PL_argvoutgv = Nullgv;
1033 PL_stdingv = Nullgv;
1034 PL_stderrgv = Nullgv;
1035 PL_last_in_gv = Nullgv;
1040 PL_DBsingle = Nullsv;
1041 PL_DBtrace = Nullsv;
1042 PL_DBsignal = Nullsv;
1045 PL_debstash = Nullhv;
1047 SvREFCNT_dec(PL_argvout_stack);
1048 PL_argvout_stack = Nullav;
1050 SvREFCNT_dec(PL_modglobal);
1051 PL_modglobal = Nullhv;
1052 SvREFCNT_dec(PL_preambleav);
1053 PL_preambleav = Nullav;
1054 SvREFCNT_dec(PL_subname);
1055 PL_subname = Nullsv;
1056 SvREFCNT_dec(PL_linestr);
1057 PL_linestr = Nullsv;
1058 SvREFCNT_dec(PL_pidstatus);
1059 PL_pidstatus = Nullhv;
1060 SvREFCNT_dec(PL_toptarget);
1061 PL_toptarget = Nullsv;
1062 SvREFCNT_dec(PL_bodytarget);
1063 PL_bodytarget = Nullsv;
1064 PL_formtarget = Nullsv;
1066 /* free locale stuff */
1067 #ifdef USE_LOCALE_COLLATE
1068 Safefree(PL_collation_name);
1069 PL_collation_name = Nullch;
1072 #ifdef USE_LOCALE_NUMERIC
1073 Safefree(PL_numeric_name);
1074 PL_numeric_name = Nullch;
1075 SvREFCNT_dec(PL_numeric_radix_sv);
1076 PL_numeric_radix_sv = Nullsv;
1079 /* clear utf8 character classes */
1080 SvREFCNT_dec(PL_utf8_alnum);
1081 SvREFCNT_dec(PL_utf8_alnumc);
1082 SvREFCNT_dec(PL_utf8_ascii);
1083 SvREFCNT_dec(PL_utf8_alpha);
1084 SvREFCNT_dec(PL_utf8_space);
1085 SvREFCNT_dec(PL_utf8_cntrl);
1086 SvREFCNT_dec(PL_utf8_graph);
1087 SvREFCNT_dec(PL_utf8_digit);
1088 SvREFCNT_dec(PL_utf8_upper);
1089 SvREFCNT_dec(PL_utf8_lower);
1090 SvREFCNT_dec(PL_utf8_print);
1091 SvREFCNT_dec(PL_utf8_punct);
1092 SvREFCNT_dec(PL_utf8_xdigit);
1093 SvREFCNT_dec(PL_utf8_mark);
1094 SvREFCNT_dec(PL_utf8_toupper);
1095 SvREFCNT_dec(PL_utf8_totitle);
1096 SvREFCNT_dec(PL_utf8_tolower);
1097 SvREFCNT_dec(PL_utf8_tofold);
1098 SvREFCNT_dec(PL_utf8_idstart);
1099 SvREFCNT_dec(PL_utf8_idcont);
1100 PL_utf8_alnum = Nullsv;
1101 PL_utf8_alnumc = Nullsv;
1102 PL_utf8_ascii = Nullsv;
1103 PL_utf8_alpha = Nullsv;
1104 PL_utf8_space = Nullsv;
1105 PL_utf8_cntrl = Nullsv;
1106 PL_utf8_graph = Nullsv;
1107 PL_utf8_digit = Nullsv;
1108 PL_utf8_upper = Nullsv;
1109 PL_utf8_lower = Nullsv;
1110 PL_utf8_print = Nullsv;
1111 PL_utf8_punct = Nullsv;
1112 PL_utf8_xdigit = Nullsv;
1113 PL_utf8_mark = Nullsv;
1114 PL_utf8_toupper = Nullsv;
1115 PL_utf8_totitle = Nullsv;
1116 PL_utf8_tolower = Nullsv;
1117 PL_utf8_tofold = Nullsv;
1118 PL_utf8_idstart = Nullsv;
1119 PL_utf8_idcont = Nullsv;
1121 if (!specialWARN(PL_compiling.cop_warnings))
1122 SvREFCNT_dec(PL_compiling.cop_warnings);
1123 PL_compiling.cop_warnings = Nullsv;
1124 if (!specialCopIO(PL_compiling.cop_io))
1125 SvREFCNT_dec(PL_compiling.cop_io);
1126 PL_compiling.cop_io = Nullsv;
1127 CopFILE_free(&PL_compiling);
1128 CopSTASH_free(&PL_compiling);
1130 /* Prepare to destruct main symbol table. */
1135 SvREFCNT_dec(PL_curstname);
1136 PL_curstname = Nullsv;
1138 /* clear queued errors */
1139 SvREFCNT_dec(PL_errors);
1143 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1144 if (PL_scopestack_ix != 0)
1145 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1146 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1147 (long)PL_scopestack_ix);
1148 if (PL_savestack_ix != 0)
1149 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1150 "Unbalanced saves: %ld more saves than restores\n",
1151 (long)PL_savestack_ix);
1152 if (PL_tmps_floor != -1)
1153 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1154 (long)PL_tmps_floor + 1);
1155 if (cxstack_ix != -1)
1156 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1157 (long)cxstack_ix + 1);
1160 /* Now absolutely destruct everything, somehow or other, loops or no. */
1161 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1162 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1164 /* the 2 is for PL_fdpid and PL_strtab */
1165 while (PL_sv_count > 2 && sv_clean_all())
1168 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1169 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1170 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1171 SvFLAGS(PL_strtab) |= SVt_PVHV;
1173 AvREAL_off(PL_fdpid); /* no surviving entries */
1174 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1177 #ifdef HAVE_INTERP_INTERN
1181 /* Destruct the global string table. */
1183 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1184 * so that sv_free() won't fail on them.
1192 max = HvMAX(PL_strtab);
1193 array = HvARRAY(PL_strtab);
1196 if (hent && ckWARN_d(WARN_INTERNAL)) {
1197 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1198 "Unbalanced string table refcount: (%d) for \"%s\"",
1199 HeVAL(hent) - Nullsv, HeKEY(hent));
1200 HeVAL(hent) = Nullsv;
1201 hent = HeNEXT(hent);
1206 hent = array[riter];
1210 SvREFCNT_dec(PL_strtab);
1213 /* free the pointer table used for cloning */
1214 ptr_table_free(PL_ptr_table);
1215 PL_ptr_table = (PTR_TBL_t*)NULL;
1218 /* free special SVs */
1220 SvREFCNT(&PL_sv_yes) = 0;
1221 sv_clear(&PL_sv_yes);
1222 SvANY(&PL_sv_yes) = NULL;
1223 SvFLAGS(&PL_sv_yes) = 0;
1225 SvREFCNT(&PL_sv_no) = 0;
1226 sv_clear(&PL_sv_no);
1227 SvANY(&PL_sv_no) = NULL;
1228 SvFLAGS(&PL_sv_no) = 0;
1232 for (i=0; i<=2; i++) {
1233 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1234 sv_clear(PERL_DEBUG_PAD(i));
1235 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1236 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1240 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1241 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1243 #ifdef DEBUG_LEAKING_SCALARS
1244 if (PL_sv_count != 0) {
1249 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1250 svend = &sva[SvREFCNT(sva)];
1251 for (sv = sva + 1; sv < svend; ++sv) {
1252 if (SvTYPE(sv) != SVTYPEMASK) {
1253 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1255 " refcnt=%"UVuf pTHX__FORMAT "\n",
1256 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE);
1257 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1258 Perl_dump_sv_child(aTHX_ sv);
1264 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1268 /* Wait for up to 4 seconds for child to terminate.
1269 This seems to be the least effort way of timing out on reaping
1271 struct timeval waitfor = {4, 0};
1272 int sock = PL_dumper_fd;
1276 FD_SET(sock, &rset);
1277 select(sock + 1, &rset, NULL, NULL, &waitfor);
1278 waitpid(child, &status, WNOHANG);
1286 #if defined(PERLIO_LAYERS)
1287 /* No more IO - including error messages ! */
1288 PerlIO_cleanup(aTHX);
1291 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1292 as currently layers use it rather than Nullsv as a marker
1293 for no arg - and will try and SvREFCNT_dec it.
1295 SvREFCNT(&PL_sv_undef) = 0;
1296 SvREADONLY_off(&PL_sv_undef);
1298 Safefree(PL_origfilename);
1299 PL_origfilename = Nullch;
1300 Safefree(PL_reg_start_tmp);
1301 PL_reg_start_tmp = (char**)NULL;
1302 PL_reg_start_tmpl = 0;
1303 Safefree(PL_reg_curpm);
1304 Safefree(PL_reg_poscache);
1305 free_tied_hv_pool();
1306 Safefree(PL_op_mask);
1307 Safefree(PL_psig_ptr);
1308 PL_psig_ptr = (SV**)NULL;
1309 Safefree(PL_psig_name);
1310 PL_psig_name = (SV**)NULL;
1311 Safefree(PL_bitcount);
1312 PL_bitcount = Nullch;
1313 Safefree(PL_psig_pend);
1314 PL_psig_pend = (int*)NULL;
1315 PL_formfeed = Nullsv;
1319 PL_tainting = FALSE;
1320 PL_taint_warn = FALSE;
1321 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1324 DEBUG_P(debprofdump());
1325 #ifdef USE_5005THREADS
1326 MUTEX_DESTROY(&PL_strtab_mutex);
1327 MUTEX_DESTROY(&PL_sv_mutex);
1328 MUTEX_DESTROY(&PL_eval_mutex);
1329 MUTEX_DESTROY(&PL_cred_mutex);
1330 MUTEX_DESTROY(&PL_fdpid_mutex);
1331 COND_DESTROY(&PL_eval_cond);
1332 #ifdef EMULATE_ATOMIC_REFCOUNTS
1333 MUTEX_DESTROY(&PL_svref_mutex);
1334 #endif /* EMULATE_ATOMIC_REFCOUNTS */
1336 /* As the penultimate thing, free the non-arena SV for thrsv */
1337 Safefree(SvPVX(PL_thrsv));
1338 Safefree(SvANY(PL_thrsv));
1341 #endif /* USE_5005THREADS */
1343 #ifdef USE_REENTRANT_API
1344 Perl_reentrant_free(aTHX);
1349 /* As the absolutely last thing, free the non-arena SV for mess() */
1352 /* we know that type == SVt_PVMG */
1354 /* it could have accumulated taint magic */
1357 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1358 moremagic = mg->mg_moremagic;
1359 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1361 Safefree(mg->mg_ptr);
1365 /* we know that type >= SVt_PV */
1366 SvPV_free(PL_mess_sv);
1367 Safefree(SvANY(PL_mess_sv));
1368 Safefree(PL_mess_sv);
1369 PL_mess_sv = Nullsv;
1371 return STATUS_NATIVE_EXPORT;
1375 =for apidoc perl_free
1377 Releases a Perl interpreter. See L<perlembed>.
1385 #if defined(WIN32) || defined(NETWARE)
1386 # if defined(PERL_IMPLICIT_SYS)
1388 void *host = nw_internal_host;
1390 void *host = w32_internal_host;
1392 PerlMem_free(aTHXx);
1394 nw_delete_internal_host(host);
1396 win32_delete_internal_host(host);
1399 PerlMem_free(aTHXx);
1402 PerlMem_free(aTHXx);
1406 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1407 /* provide destructors to clean up the thread key when libperl is unloaded */
1408 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1410 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1411 #pragma fini "perl_fini"
1415 #if defined(__GNUC__)
1416 __attribute__((destructor))
1425 #endif /* THREADS */
1428 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1430 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1431 PL_exitlist[PL_exitlistlen].fn = fn;
1432 PL_exitlist[PL_exitlistlen].ptr = ptr;
1437 =for apidoc perl_parse
1439 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1445 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1450 #ifdef USE_5005THREADS
1454 PERL_UNUSED_VAR(my_perl);
1456 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1459 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1460 setuid perl scripts securely.\n");
1461 #endif /* IAMSUID */
1464 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1465 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1466 * This MUST be done before any hash stores or fetches take place.
1467 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1468 * yourself, it is your responsibility to provide a good random seed!
1469 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1470 if (!PL_rehash_seed_set)
1471 PL_rehash_seed = get_hash_seed();
1473 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1475 if (s && (atoi(s) == 1))
1476 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1478 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1484 /* Set PL_origalen be the sum of the contiguous argv[]
1485 * elements plus the size of the env in case that it is
1486 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1487 * as the maximum modifiable length of $0. In the worst case
1488 * the area we are able to modify is limited to the size of
1489 * the original argv[0]. (See below for 'contiguous', though.)
1491 const char *s = NULL;
1494 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1495 /* Do the mask check only if the args seem like aligned. */
1497 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1499 /* See if all the arguments are contiguous in memory. Note
1500 * that 'contiguous' is a loose term because some platforms
1501 * align the argv[] and the envp[]. If the arguments look
1502 * like non-aligned, assume that they are 'strictly' or
1503 * 'traditionally' contiguous. If the arguments look like
1504 * aligned, we just check that they are within aligned
1505 * PTRSIZE bytes. As long as no system has something bizarre
1506 * like the argv[] interleaved with some other data, we are
1507 * fine. (Did I just evoke Murphy's Law?) --jhi */
1508 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1510 for (i = 1; i < PL_origargc; i++) {
1511 if ((PL_origargv[i] == s + 1
1513 || PL_origargv[i] == s + 2
1518 (PL_origargv[i] > s &&
1520 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1530 /* Can we grab env area too to be used as the area for $0? */
1531 if (PL_origenviron) {
1532 if ((PL_origenviron[0] == s + 1
1534 || (PL_origenviron[0] == s + 9 && (s += 8))
1539 (PL_origenviron[0] > s &&
1540 PL_origenviron[0] <=
1541 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1545 s = PL_origenviron[0];
1548 my_setenv("NoNe SuCh", Nullch);
1549 /* Force copy of environment. */
1550 for (i = 1; PL_origenviron[i]; i++) {
1551 if (PL_origenviron[i] == s + 1
1554 (PL_origenviron[i] > s &&
1555 PL_origenviron[i] <=
1556 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1559 s = PL_origenviron[i];
1567 PL_origalen = s - PL_origargv[0];
1572 /* Come here if running an undumped a.out. */
1574 PL_origfilename = savepv(argv[0]);
1575 PL_do_undump = FALSE;
1576 cxstack_ix = -1; /* start label stack again */
1578 init_postdump_symbols(argc,argv,env);
1583 op_free(PL_main_root);
1584 PL_main_root = Nullop;
1586 PL_main_start = Nullop;
1587 SvREFCNT_dec(PL_main_cv);
1588 PL_main_cv = Nullcv;
1591 oldscope = PL_scopestack_ix;
1592 PL_dowarn = G_WARN_OFF;
1594 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1595 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
1601 #ifndef PERL_FLEXIBLE_EXCEPTIONS
1602 parse_body(env,xsinit);
1605 call_list(oldscope, PL_checkav);
1612 /* my_exit() was called */
1613 while (PL_scopestack_ix > oldscope)
1616 PL_curstash = PL_defstash;
1618 call_list(oldscope, PL_checkav);
1619 ret = STATUS_NATIVE_EXPORT;
1622 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1630 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1632 S_vparse_body(pTHX_ va_list args)
1634 char **env = va_arg(args, char**);
1635 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1637 return parse_body(env, xsinit);
1642 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1644 int argc = PL_origargc;
1645 char **argv = PL_origargv;
1646 const char *scriptname = NULL;
1647 VOL bool dosearch = FALSE;
1648 const char *validarg = "";
1651 const char *cddir = Nullch;
1652 #ifdef USE_SITECUSTOMIZE
1653 bool minus_f = FALSE;
1658 sv_setpvn(PL_linestr,"",0);
1659 sv = newSVpvn("",0); /* first used for -I flags */
1663 for (argc--,argv++; argc > 0; argc--,argv++) {
1664 if (argv[0][0] != '-' || !argv[0][1])
1668 validarg = " PHOOEY ";
1672 * Can we rely on the kernel to start scripts with argv[1] set to
1673 * contain all #! line switches (the whole line)? (argv[0] is set to
1674 * the interpreter name, argv[2] to the script name; argv[3] and
1675 * above may contain other arguments.)
1682 #ifndef PERL_STRICT_CR
1706 if ((s = moreswitches(s)))
1711 CHECK_MALLOC_TOO_LATE_FOR('t');
1712 if( !PL_tainting ) {
1713 PL_taint_warn = TRUE;
1719 CHECK_MALLOC_TOO_LATE_FOR('T');
1721 PL_taint_warn = FALSE;
1726 #ifdef MACOS_TRADITIONAL
1727 /* ignore -e for Dev:Pseudo argument */
1728 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1733 PL_e_script = newSVpvn("",0);
1734 filter_add(read_e_script, NULL);
1737 sv_catpv(PL_e_script, s);
1739 sv_catpv(PL_e_script, argv[1]);
1743 Perl_croak(aTHX_ "No code specified for -e");
1744 sv_catpv(PL_e_script, "\n");
1748 #ifdef USE_SITECUSTOMIZE
1754 case 'I': /* -I handled both here and in moreswitches() */
1756 if (!*++s && (s=argv[1]) != Nullch) {
1760 STRLEN len = strlen(s);
1761 const char * const p = savepvn(s, len);
1762 incpush(p, TRUE, TRUE, FALSE);
1763 sv_catpvn(sv, "-I", 2);
1764 sv_catpvn(sv, p, len);
1765 sv_catpvn(sv, " ", 1);
1769 Perl_croak(aTHX_ "No directory specified for -I");
1773 PL_preprocess = TRUE;
1786 PL_preambleav = newAV();
1787 av_push(PL_preambleav,
1788 newSVpv("use Config;",0));
1792 opts_prog = newSVpv("print Config::myconfig(),",0);
1794 sv_catpv(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1796 sv_catpv(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1798 opts = SvCUR(opts_prog);
1800 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1804 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1805 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1807 # ifdef FAKE_THREADS
1810 # ifdef MULTIPLICITY
1816 # ifdef PERL_DONT_CREATE_GVSV
1817 " PERL_DONT_CREATE_GVSV"
1819 # ifdef PERL_GLOBAL_STRUCT
1820 " PERL_GLOBAL_STRUCT"
1822 # ifdef PERL_IMPLICIT_CONTEXT
1823 " PERL_IMPLICIT_CONTEXT"
1825 # ifdef PERL_IMPLICIT_SYS
1826 " PERL_IMPLICIT_SYS"
1828 # ifdef PERL_MALLOC_WRAP
1831 # ifdef PERL_NEED_APPCTX
1834 # ifdef PERL_NEED_TIMESBASE
1835 " PERL_NEED_TIMESBASE"
1837 # ifdef PERL_OLD_COPY_ON_WRITE
1838 " PERL_OLD_COPY_ON_WRITE"
1840 # ifdef PERL_USE_SAFE_PUTENV
1841 " PERL_USE_SAFE_PUTENV"
1843 # ifdef PL_OP_SLAB_ALLOC
1846 # ifdef THREADS_HAVE_PIDS
1847 " THREADS_HAVE_PIDS"
1849 # ifdef USE_5005THREADS
1852 # ifdef USE_64_BIT_ALL
1855 # ifdef USE_64_BIT_INT
1858 # ifdef USE_ITHREADS
1861 # ifdef USE_LARGE_FILES
1864 # ifdef USE_LONG_DOUBLE
1870 # ifdef USE_REENTRANT_API
1871 " USE_REENTRANT_API"
1876 # ifdef USE_SITECUSTOMIZE
1877 " USE_SITECUSTOMIZE"
1884 while (SvCUR(opts_prog) > opts+76) {
1885 /* find last space after "options: " and before col 76
1889 char *pv = SvPV_nolen(opts_prog);
1890 const char c = pv[opts+76];
1892 space = strrchr(pv+opts+26, ' ');
1894 if (!space) break; /* "Can't happen" */
1896 /* break the line before that space */
1899 sv_insert(opts_prog, opts, 0,
1903 sv_catpv(opts_prog,"\\n\",");
1905 #if defined(LOCAL_PATCH_COUNT)
1906 if (LOCAL_PATCH_COUNT > 0) {
1909 "\" Locally applied patches:\\n\",");
1910 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1911 if (PL_localpatches[i])
1912 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1913 0, PL_localpatches[i], 0);
1917 Perl_sv_catpvf(aTHX_ opts_prog,
1918 "\" Built under %s\\n\"",OSNAME);
1921 Perl_sv_catpvf(aTHX_ opts_prog,
1922 ",\" Compiled at %s %s\\n\"",__DATE__,
1925 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1929 sv_catpv(opts_prog, "; $\"=\"\\n \"; "
1930 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1931 "sort grep {/^PERL/} keys %ENV; ");
1934 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1937 "print \" \\%ENV:\\n @env\\n\" if @env;"
1938 "print \" \\@INC:\\n @INC\\n\";");
1942 opts_prog = Perl_newSVpvf(aTHX_
1943 "Config::config_vars(qw%c%s%c)",
1947 av_push(PL_preambleav, opts_prog);
1948 /* don't look for script or read stdin */
1949 scriptname = BIT_BUCKET;
1953 PL_doextract = TRUE;
1961 if (!*++s || isSPACE(*s)) {
1965 /* catch use of gnu style long options */
1966 if (strEQ(s, "version")) {
1970 if (strEQ(s, "help")) {
1977 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1983 #ifndef SECURE_INTERNAL_GETENV
1986 (s = PerlEnv_getenv("PERL5OPT")))
1988 const char *popt = s;
1991 if (*s == '-' && *(s+1) == 'T') {
1992 CHECK_MALLOC_TOO_LATE_FOR('T');
1994 PL_taint_warn = FALSE;
1997 char *popt_copy = Nullch;
2010 if (!strchr("DIMUdmtw", *s))
2011 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2015 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2016 s = popt_copy + (s - popt);
2017 d = popt_copy + (d - popt);
2024 if( !PL_tainting ) {
2025 PL_taint_warn = TRUE;
2035 #ifdef USE_SITECUSTOMIZE
2038 PL_preambleav = newAV();
2039 av_unshift(PL_preambleav, 1);
2040 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2044 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2045 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2049 scriptname = argv[0];
2052 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2054 else if (scriptname == Nullch) {
2056 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2064 open_script(scriptname,dosearch,sv);
2066 validate_suid(validarg, scriptname);
2069 #if defined(SIGCHLD) || defined(SIGCLD)
2072 # define SIGCHLD SIGCLD
2074 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2075 if (sigstate == SIG_IGN) {
2076 if (ckWARN(WARN_SIGNAL))
2077 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2078 "Can't ignore signal CHLD, forcing to default");
2079 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2085 #ifdef MACOS_TRADITIONAL
2086 if (PL_doextract || gMacPerl_AlwaysExtract) {
2091 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2092 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2096 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
2097 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2098 CvUNIQUE_on(PL_compcv);
2100 CvPADLIST(PL_compcv) = pad_new(0);
2101 #ifdef USE_5005THREADS
2102 CvOWNER(PL_compcv) = 0;
2103 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2104 MUTEX_INIT(CvMUTEXP(PL_compcv));
2105 #endif /* USE_5005THREADS */
2108 boot_core_UNIVERSAL();
2109 boot_core_xsutils();
2112 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2114 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
2120 # ifdef HAS_SOCKS5_INIT
2121 socks5_init(argv[0]);
2127 init_predump_symbols();
2128 /* init_postdump_symbols not currently designed to be called */
2129 /* more than once (ENV isn't cleared first, for example) */
2130 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2132 init_postdump_symbols(argc,argv,env);
2134 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2135 * or explicitly in some platforms.
2136 * locale.c:Perl_init_i18nl10n() if the environment
2137 * look like the user wants to use UTF-8. */
2138 #if defined(SYMBIAN)
2139 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2142 /* Requires init_predump_symbols(). */
2143 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2148 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2149 * and the default open disciplines. */
2150 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2151 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2153 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2154 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2155 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2157 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2158 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2159 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2161 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2162 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2163 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2164 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2165 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2168 sv_setpvn(sv, ":utf8\0:utf8", 11);
2170 sv_setpvn(sv, ":utf8\0", 6);
2173 sv_setpvn(sv, "\0:utf8", 6);
2179 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2180 if (strEQ(s, "unsafe"))
2181 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2182 else if (strEQ(s, "safe"))
2183 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2185 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2190 /* now parse the script */
2192 SETERRNO(0,SS_NORMAL);
2194 #ifdef MACOS_TRADITIONAL
2195 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2197 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2199 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2200 MacPerl_MPWFileName(PL_origfilename));
2204 if (yyparse() || PL_error_count) {
2206 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2208 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2213 CopLINE_set(PL_curcop, 0);
2214 PL_curstash = PL_defstash;
2215 PL_preprocess = FALSE;
2217 SvREFCNT_dec(PL_e_script);
2218 PL_e_script = Nullsv;
2225 SAVECOPFILE(PL_curcop);
2226 SAVECOPLINE(PL_curcop);
2227 gv_check(PL_defstash);
2234 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2235 dump_mstats("after compilation:");
2244 =for apidoc perl_run
2246 Tells a Perl interpreter to run. See L<perlembed>.
2257 #ifdef USE_5005THREADS
2261 PERL_UNUSED_ARG(my_perl);
2263 oldscope = PL_scopestack_ix;
2268 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2270 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
2276 cxstack_ix = -1; /* start context stack again */
2278 case 0: /* normal completion */
2279 #ifndef PERL_FLEXIBLE_EXCEPTIONS
2284 case 2: /* my_exit() */
2285 while (PL_scopestack_ix > oldscope)
2288 PL_curstash = PL_defstash;
2289 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2290 PL_endav && !PL_minus_c)
2291 call_list(oldscope, PL_endav);
2293 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2294 dump_mstats("after execution: ");
2296 ret = STATUS_NATIVE_EXPORT;
2300 POPSTACK_TO(PL_mainstack);
2303 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2313 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2315 S_vrun_body(pTHX_ va_list args)
2317 I32 oldscope = va_arg(args, I32);
2319 return run_body(oldscope);
2325 S_run_body(pTHX_ I32 oldscope)
2327 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2328 PL_sawampersand ? "Enabling" : "Omitting"));
2330 if (!PL_restartop) {
2331 DEBUG_x(dump_all());
2333 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2335 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2339 #ifdef MACOS_TRADITIONAL
2340 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2341 (gMacPerl_ErrorFormat ? "# " : ""),
2342 MacPerl_MPWFileName(PL_origfilename));
2344 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2348 if (PERLDB_SINGLE && PL_DBsingle)
2349 sv_setiv(PL_DBsingle, 1);
2351 call_list(oldscope, PL_initav);
2357 PL_op = PL_restartop;
2361 else if (PL_main_start) {
2362 CvDEPTH(PL_main_cv) = 1;
2363 PL_op = PL_main_start;
2371 =head1 SV Manipulation Functions
2373 =for apidoc p||get_sv
2375 Returns the SV of the specified Perl scalar. If C<create> is set and the
2376 Perl variable does not exist then it will be created. If C<create> is not
2377 set and the variable does not exist then NULL is returned.
2383 Perl_get_sv(pTHX_ const char *name, I32 create)
2386 #ifdef USE_5005THREADS
2387 if (name[1] == '\0' && !isALPHA(name[0])) {
2388 PADOFFSET tmp = find_threadsv(name);
2389 if (tmp != NOT_IN_PAD)
2390 return THREADSV(tmp);
2392 #endif /* USE_5005THREADS */
2393 gv = gv_fetchpv(name, create, SVt_PV);
2400 =head1 Array Manipulation Functions
2402 =for apidoc p||get_av
2404 Returns the AV of the specified Perl array. If C<create> is set and the
2405 Perl variable does not exist then it will be created. If C<create> is not
2406 set and the variable does not exist then NULL is returned.
2412 Perl_get_av(pTHX_ const char *name, I32 create)
2414 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
2423 =head1 Hash Manipulation Functions
2425 =for apidoc p||get_hv
2427 Returns the HV of the specified Perl hash. If C<create> is set and the
2428 Perl variable does not exist then it will be created. If C<create> is not
2429 set and the variable does not exist then NULL is returned.
2435 Perl_get_hv(pTHX_ const char *name, I32 create)
2437 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2446 =head1 CV Manipulation Functions
2448 =for apidoc p||get_cv
2450 Returns the CV of the specified Perl subroutine. If C<create> is set and
2451 the Perl subroutine does not exist then it will be declared (which has the
2452 same effect as saying C<sub name;>). If C<create> is not set and the
2453 subroutine does not exist then NULL is returned.
2459 Perl_get_cv(pTHX_ const char *name, I32 create)
2461 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
2462 /* XXX unsafe for threads if eval_owner isn't held */
2463 /* XXX this is probably not what they think they're getting.
2464 * It has the same effect as "sub name;", i.e. just a forward
2466 if (create && !GvCVu(gv))
2467 return newSUB(start_subparse(FALSE, 0),
2468 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2476 /* Be sure to refetch the stack pointer after calling these routines. */
2480 =head1 Callback Functions
2482 =for apidoc p||call_argv
2484 Performs a callback to the specified Perl sub. See L<perlcall>.
2490 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2492 /* See G_* flags in cop.h */
2493 /* null terminated arg list */
2500 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2505 return call_pv(sub_name, flags);
2509 =for apidoc p||call_pv
2511 Performs a callback to the specified Perl sub. See L<perlcall>.
2517 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2518 /* name of the subroutine */
2519 /* See G_* flags in cop.h */
2521 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2525 =for apidoc p||call_method
2527 Performs a callback to the specified Perl method. The blessed object must
2528 be on the stack. See L<perlcall>.
2534 Perl_call_method(pTHX_ const char *methname, I32 flags)
2535 /* name of the subroutine */
2536 /* See G_* flags in cop.h */
2538 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2541 /* May be called with any of a CV, a GV, or an SV containing the name. */
2543 =for apidoc p||call_sv
2545 Performs a callback to the Perl sub whose name is in the SV. See
2552 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2553 /* See G_* flags in cop.h */
2556 LOGOP myop; /* fake syntax tree node */
2559 volatile I32 retval = 0;
2561 bool oldcatch = CATCH_GET;
2566 if (flags & G_DISCARD) {
2571 Zero(&myop, 1, LOGOP);
2572 myop.op_next = Nullop;
2573 if (!(flags & G_NOARGS))
2574 myop.op_flags |= OPf_STACKED;
2575 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2576 (flags & G_ARRAY) ? OPf_WANT_LIST :
2581 EXTEND(PL_stack_sp, 1);
2582 *++PL_stack_sp = sv;
2584 oldscope = PL_scopestack_ix;
2586 if (PERLDB_SUB && PL_curstash != PL_debstash
2587 /* Handle first BEGIN of -d. */
2588 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2589 /* Try harder, since this may have been a sighandler, thus
2590 * curstash may be meaningless. */
2591 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2592 && !(flags & G_NODEBUG))
2593 PL_op->op_private |= OPpENTERSUB_DB;
2595 if (flags & G_METHOD) {
2596 Zero(&method_op, 1, UNOP);
2597 method_op.op_next = PL_op;
2598 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2599 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2600 PL_op = (OP*)&method_op;
2603 if (!(flags & G_EVAL)) {
2605 call_body((OP*)&myop, FALSE);
2606 retval = PL_stack_sp - (PL_stack_base + oldmark);
2607 CATCH_SET(oldcatch);
2610 myop.op_other = (OP*)&myop;
2612 /* we're trying to emulate pp_entertry() here */
2614 register PERL_CONTEXT *cx;
2615 const I32 gimme = GIMME_V;
2620 push_return(Nullop);
2621 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2623 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2625 PL_in_eval = EVAL_INEVAL;
2626 if (flags & G_KEEPERR)
2627 PL_in_eval |= EVAL_KEEPERR;
2629 sv_setpvn(ERRSV,"",0);
2633 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2635 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
2642 #ifndef PERL_FLEXIBLE_EXCEPTIONS
2644 call_body((OP*)&myop, FALSE);
2646 retval = PL_stack_sp - (PL_stack_base + oldmark);
2647 if (!(flags & G_KEEPERR))
2648 sv_setpvn(ERRSV,"",0);
2654 /* my_exit() was called */
2655 PL_curstash = PL_defstash;
2658 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2659 Perl_croak(aTHX_ "Callback called exit");
2664 PL_op = PL_restartop;
2668 PL_stack_sp = PL_stack_base + oldmark;
2669 if (flags & G_ARRAY)
2673 *++PL_stack_sp = &PL_sv_undef;
2678 if (PL_scopestack_ix > oldscope) {
2682 register PERL_CONTEXT *cx;
2690 PERL_UNUSED_VAR(newsp);
2691 PERL_UNUSED_VAR(gimme);
2692 PERL_UNUSED_VAR(optype);
2697 if (flags & G_DISCARD) {
2698 PL_stack_sp = PL_stack_base + oldmark;
2707 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2709 S_vcall_body(pTHX_ va_list args)
2711 OP *myop = va_arg(args, OP*);
2712 int is_eval = va_arg(args, int);
2714 call_body(myop, is_eval);
2720 S_call_body(pTHX_ const OP *myop, bool is_eval)
2722 if (PL_op == myop) {
2724 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2726 PL_op = Perl_pp_entersub(aTHX); /* this does */
2732 /* Eval a string. The G_EVAL flag is always assumed. */
2735 =for apidoc p||eval_sv
2737 Tells Perl to C<eval> the string in the SV.
2743 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2745 /* See G_* flags in cop.h */
2748 UNOP myop; /* fake syntax tree node */
2749 volatile I32 oldmark = SP - PL_stack_base;
2750 volatile I32 retval = 0;
2755 if (flags & G_DISCARD) {
2762 Zero(PL_op, 1, UNOP);
2763 EXTEND(PL_stack_sp, 1);
2764 *++PL_stack_sp = sv;
2766 if (!(flags & G_NOARGS))
2767 myop.op_flags = OPf_STACKED;
2768 myop.op_next = Nullop;
2769 myop.op_type = OP_ENTEREVAL;
2770 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2771 (flags & G_ARRAY) ? OPf_WANT_LIST :
2773 if (flags & G_KEEPERR)
2774 myop.op_flags |= OPf_SPECIAL;
2776 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2778 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
2781 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2782 * before a PUSHEVAL, which corrupts the stack after a croak */
2783 TAINT_PROPER("eval_sv()");
2789 #ifndef PERL_FLEXIBLE_EXCEPTIONS
2791 call_body((OP*)&myop,TRUE);
2793 retval = PL_stack_sp - (PL_stack_base + oldmark);
2794 if (!(flags & G_KEEPERR))
2795 sv_setpvn(ERRSV,"",0);
2801 /* my_exit() was called */
2802 PL_curstash = PL_defstash;
2805 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2806 Perl_croak(aTHX_ "Callback called exit");
2811 PL_op = PL_restartop;
2815 PL_stack_sp = PL_stack_base + oldmark;
2816 if (flags & G_ARRAY)
2820 *++PL_stack_sp = &PL_sv_undef;
2826 if (flags & G_DISCARD) {
2827 PL_stack_sp = PL_stack_base + oldmark;
2837 =for apidoc p||eval_pv
2839 Tells Perl to C<eval> the given string and return an SV* result.
2845 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2848 SV* sv = newSVpv(p, 0);
2850 eval_sv(sv, G_SCALAR);
2857 if (croak_on_error && SvTRUE(ERRSV)) {
2858 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2864 /* Require a module. */
2867 =head1 Embedding Functions
2869 =for apidoc p||require_pv
2871 Tells Perl to C<require> the file named by the string argument. It is
2872 analogous to the Perl code C<eval "require '$file'">. It's even
2873 implemented that way; consider using load_module instead.
2878 Perl_require_pv(pTHX_ const char *pv)
2882 PUSHSTACKi(PERLSI_REQUIRE);
2884 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2885 eval_sv(sv_2mortal(sv), G_DISCARD);
2891 Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
2895 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
2896 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2900 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2902 /* This message really ought to be max 23 lines.
2903 * Removed -h because the user already knows that option. Others? */
2905 static const char * const usage_msg[] = {
2906 "-0[octal] specify record separator (\\0, if no argument)",
2907 "-a autosplit mode with -n or -p (splits $_ into @F)",
2908 "-C[number/list] enables the listed Unicode features",
2909 "-c check syntax only (runs BEGIN and CHECK blocks)",
2910 "-d[:debugger] run program under debugger",
2911 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2912 "-e program one line of program (several -e's allowed, omit programfile)",
2913 "-f don't do $sitelib/sitecustomize.pl at startup",
2914 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2915 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2916 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2917 "-l[octal] enable line ending processing, specifies line terminator",
2918 "-[mM][-]module execute \"use/no module...\" before executing program",
2919 "-n assume \"while (<>) { ... }\" loop around program",
2920 "-p assume loop like -n but print line also, like sed",
2921 "-P run program through C preprocessor before compilation",
2922 "-s enable rudimentary parsing for switches after programfile",
2923 "-S look for programfile using PATH environment variable",
2924 "-t enable tainting warnings",
2925 "-T enable tainting checks",
2926 "-u dump core after parsing program",
2927 "-U allow unsafe operations",
2928 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2929 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2930 "-w enable many useful warnings (RECOMMENDED)",
2931 "-W enable all warnings",
2932 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2933 "-X disable all warnings",
2937 const char * const *p = usage_msg;
2939 PerlIO_printf(PerlIO_stdout(),
2940 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2943 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2946 /* convert a string of -D options (or digits) into an int.
2947 * sets *s to point to the char after the options */
2951 Perl_get_debug_opts(pTHX_ char **s)
2953 return get_debug_opts_flags(s, 1);
2957 Perl_get_debug_opts_flags(pTHX_ char **s, int flags)
2959 static const char * const usage_msgd[] = {
2960 " Debugging flag values: (see also -d)",
2961 " p Tokenizing and parsing (with v, displays parse stack)",
2962 " s Stack snapshots (with v, displays all stacks)",
2963 " l Context (loop) stack processing",
2964 " t Trace execution",
2965 " o Method and overloading resolution",
2966 " c String/numeric conversions",
2967 " P Print profiling info, preprocessor command for -P, source file input state",
2968 " m Memory allocation",
2969 " f Format processing",
2970 " r Regular expression parsing and execution",
2971 " x Syntax tree dump",
2972 " u Tainting checks",
2973 " H Hash dump -- usurps values()",
2974 " X Scratchpad allocation",
2976 " S Thread synchronization",
2978 " R Include reference counts of dumped variables (eg when using -Ds)",
2979 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2980 " v Verbose: use in conjunction with other flags",
2982 " A Consistency checks on internal structures",
2983 " q quiet - currently only suppresses the 'EXECUTING' message",
2988 /* if adding extra options, remember to update DEBUG_MASK */
2989 static const char debopts[] = "psltocPmfrxu HXDSTRJvC";
2991 for (; isALNUM(**s); (*s)++) {
2992 const char *d = strchr(debopts,**s);
2994 i |= 1 << (d - debopts);
2995 else if (ckWARN_d(WARN_DEBUGGING))
2996 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2997 "invalid option -D%c, use -D'' to see choices\n", **s);
3000 else if (isDIGIT(**s)) {
3002 for (; isALNUM(**s); (*s)++) ;
3004 else if (flags & 1) {
3006 const char *const *p = usage_msgd;
3007 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3010 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3011 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3012 "-Dp not implemented on this platform\n");
3018 /* This routine handles any switches that can be given during run */
3021 Perl_moreswitches(pTHX_ char *s)
3031 SvREFCNT_dec(PL_rs);
3032 if (s[1] == 'x' && s[2]) {
3033 const char *e = s+=2;
3039 flags = PERL_SCAN_SILENT_ILLDIGIT;
3040 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3041 if (s + numlen < e) {
3042 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3046 PL_rs = newSVpvn("", 0);
3047 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3048 tmps = (U8*)SvPVX(PL_rs);
3049 uvchr_to_utf8(tmps, rschar);
3050 SvCUR_set(PL_rs, UNISKIP(rschar));
3055 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3056 if (rschar & ~((U8)~0))
3057 PL_rs = &PL_sv_undef;
3058 else if (!rschar && numlen >= 2)
3059 PL_rs = newSVpvn("", 0);
3061 char ch = (char)rschar;
3062 PL_rs = newSVpvn(&ch, 1);
3065 sv_setsv(get_sv("/", TRUE), PL_rs);
3070 PL_unicode = parse_unicode_opts(&s);
3075 while (*s && !isSPACE(*s)) ++s;
3077 PL_splitstr = savepv(PL_splitstr);
3091 /* -dt indicates to the debugger that threads will be used */
3092 if (*s == 't' && !isALNUM(s[1])) {
3094 my_setenv("PERL5DB_THREADED", "1");
3097 /* The following permits -d:Mod to accepts arguments following an =
3098 in the fashion that -MSome::Mod does. */
3099 if (*s == ':' || *s == '=') {
3102 sv = newSVpv("use Devel::", 0);
3104 /* We now allow -d:Module=Foo,Bar */
3105 while(isALNUM(*s) || *s==':') ++s;
3107 sv_catpv(sv, start);
3109 sv_catpvn(sv, start, s-start);
3110 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3113 my_setenv("PERL5DB", (char *)SvPV_nolen_const(sv));
3116 PL_perldb = PERLDB_ALL;
3125 PL_debug = get_debug_opts_flags( &s, 1) | DEBUG_TOP_FLAG;
3126 #else /* !DEBUGGING */
3127 if (ckWARN_d(WARN_DEBUGGING))
3128 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3129 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3130 for (s++; isALNUM(*s); s++) ;
3135 usage(PL_origargv[0]);
3138 Safefree(PL_inplace);
3139 #if defined(__CYGWIN__) /* do backup extension automagically */
3140 if (*(s+1) == '\0') {
3141 PL_inplace = savepv(".bak");
3144 #endif /* __CYGWIN__ */
3145 PL_inplace = savepv(s+1);
3146 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3150 if (*s == '-') /* Additional switches on #! line. */
3154 case 'I': /* -I handled both here and in parse_body() */
3157 while (*s && isSPACE(*s))
3162 /* ignore trailing spaces (possibly followed by other switches) */
3164 for (e = p; *e && !isSPACE(*e); e++) ;
3168 } while (*p && *p != '-');
3169 e = savepvn(s, e-s);
3170 incpush(e, TRUE, TRUE, FALSE);
3177 Perl_croak(aTHX_ "No directory specified for -I");
3183 SvREFCNT_dec(PL_ors_sv);
3189 PL_ors_sv = newSVpvn("\n",1);
3190 numlen = 3 + (*s == '0');
3191 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3195 if (RsPARA(PL_rs)) {
3196 PL_ors_sv = newSVpvn("\n\n",2);
3199 PL_ors_sv = newSVsv(PL_rs);
3204 forbid_setid("-M"); /* XXX ? */
3207 forbid_setid("-m"); /* XXX ? */
3211 const char *use = "use ";
3212 /* -M-foo == 'no foo' */
3213 /* Leading space on " no " is deliberate, to make both
3214 possibilities the same length. */
3215 if (*s == '-') { use = " no "; ++s; }
3216 sv = newSVpvn(use,4);
3218 /* We allow -M'Module qw(Foo Bar)' */
3219 while(isALNUM(*s) || *s==':') ++s;
3221 sv_catpv(sv, start);
3222 if (*(start-1) == 'm') {
3224 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3225 sv_catpv( sv, " ()");
3229 Perl_croak(aTHX_ "Module name required with -%c option",
3231 sv_catpvn(sv, start, s-start);
3232 sv_catpv(sv, " split(/,/,q");
3233 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
3235 sv_catpvn(sv, "\0)", 2);
3239 PL_preambleav = newAV();
3240 av_push(PL_preambleav, sv);
3243 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3255 PL_doswitches = TRUE;
3269 #ifdef MACOS_TRADITIONAL
3270 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3272 PL_do_undump = TRUE;
3281 PerlIO_printf(PerlIO_stdout(),
3282 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
3283 PL_patchlevel, ARCHNAME));
3285 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3286 PerlIO_printf(PerlIO_stdout(),
3287 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
3288 PerlIO_printf(PerlIO_stdout(),
3289 Perl_form(aTHX_ " built under %s at %s %s\n",
3290 OSNAME, __DATE__, __TIME__));
3291 PerlIO_printf(PerlIO_stdout(),
3292 Perl_form(aTHX_ " OS Specific Release: %s\n",
3296 #if defined(LOCAL_PATCH_COUNT)
3297 if (LOCAL_PATCH_COUNT > 0)
3298 PerlIO_printf(PerlIO_stdout(),
3299 "\n(with %d registered patch%s, "
3300 "see perl -V for more detail)",
3301 (int)LOCAL_PATCH_COUNT,
3302 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3305 PerlIO_printf(PerlIO_stdout(),
3306 "\n\nCopyright 1987-2006, Larry Wall\n");
3307 #ifdef MACOS_TRADITIONAL
3308 PerlIO_printf(PerlIO_stdout(),
3309 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3310 "maintained by Chris Nandor\n");
3313 PerlIO_printf(PerlIO_stdout(),
3314 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3317 PerlIO_printf(PerlIO_stdout(),
3318 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3319 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3322 PerlIO_printf(PerlIO_stdout(),
3323 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3324 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3327 PerlIO_printf(PerlIO_stdout(),
3328 "atariST series port, ++jrb bammi@cadence.com\n");
3331 PerlIO_printf(PerlIO_stdout(),
3332 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3335 PerlIO_printf(PerlIO_stdout(),
3336 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3339 PerlIO_printf(PerlIO_stdout(),
3340 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3343 PerlIO_printf(PerlIO_stdout(),
3344 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3347 PerlIO_printf(PerlIO_stdout(),
3348 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3351 PerlIO_printf(PerlIO_stdout(),
3352 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3355 PerlIO_printf(PerlIO_stdout(),
3356 "MiNT port by Guido Flohr, 1997-1999\n");
3359 PerlIO_printf(PerlIO_stdout(),
3360 "EPOC port by Olaf Flebbe, 1999-2002\n");
3363 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3364 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3367 #ifdef BINARY_BUILD_NOTICE
3368 BINARY_BUILD_NOTICE;
3370 PerlIO_printf(PerlIO_stdout(),
3372 Perl may be copied only under the terms of either the Artistic License or the\n\
3373 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3374 Complete documentation for Perl, including FAQ lists, should be found on\n\
3375 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3376 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3379 if (! (PL_dowarn & G_WARN_ALL_MASK))
3380 PL_dowarn |= G_WARN_ON;
3384 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3385 if (!specialWARN(PL_compiling.cop_warnings))
3386 SvREFCNT_dec(PL_compiling.cop_warnings);
3387 PL_compiling.cop_warnings = pWARN_ALL ;
3391 PL_dowarn = G_WARN_ALL_OFF;
3392 if (!specialWARN(PL_compiling.cop_warnings))
3393 SvREFCNT_dec(PL_compiling.cop_warnings);
3394 PL_compiling.cop_warnings = pWARN_NONE ;
3399 if (s[1] == '-') /* Additional switches on #! line. */
3404 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3410 #ifdef ALTERNATE_SHEBANG
3411 case 'S': /* OS/2 needs -S on "extproc" line. */
3419 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3424 /* compliments of Tom Christiansen */
3426 /* unexec() can be found in the Gnu emacs distribution */
3427 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3430 Perl_my_unexec(pTHX)
3438 prog = newSVpv(BIN_EXP, 0);
3439 sv_catpv(prog, "/perl");
3440 file = newSVpv(PL_origfilename, 0);
3441 sv_catpv(file, ".perldump");
3443 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3444 /* unexec prints msg to stderr in case of failure */
3445 PerlProc_exit(status);
3448 # include <lib$routines.h>
3449 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3451 ABORT(); /* for use with undump */
3456 /* initialize curinterp */
3462 # define PERLVAR(var,type)
3463 # define PERLVARA(var,n,type)
3464 # if defined(PERL_IMPLICIT_CONTEXT)
3465 # if defined(USE_5005THREADS)
3466 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3467 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3468 # else /* !USE_5005THREADS */
3469 # define PERLVARI(var,type,init) aTHX->var = init;
3470 # define PERLVARIC(var,type,init) aTHX->var = init;
3471 # endif /* USE_5005THREADS */
3473 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3474 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3476 # include "intrpvar.h"
3477 # ifndef USE_5005THREADS
3478 # include "thrdvar.h"
3485 # define PERLVAR(var,type)
3486 # define PERLVARA(var,n,type)
3487 # define PERLVARI(var,type,init) PL_##var = init;
3488 # define PERLVARIC(var,type,init) PL_##var = init;
3489 # include "intrpvar.h"
3490 # ifndef USE_5005THREADS
3491 # include "thrdvar.h"
3502 S_init_main_stash(pTHX)
3506 PL_curstash = PL_defstash = newHV();
3507 PL_curstname = newSVpvn("main",4);
3508 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3509 SvREFCNT_dec(GvHV(gv));
3510 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3512 hv_name_set(PL_defstash, "main", 4, 0);
3513 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3514 GvMULTI_on(PL_incgv);
3515 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3516 GvMULTI_on(PL_hintgv);
3517 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3518 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3519 GvMULTI_on(PL_errgv);
3520 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3521 GvMULTI_on(PL_replgv);
3522 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3523 #ifdef PERL_DONT_CREATE_GVSV
3526 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3527 sv_setpvn(ERRSV, "", 0);
3528 PL_curstash = PL_defstash;
3529 CopSTASH_set(&PL_compiling, PL_defstash);
3530 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3531 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3532 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
3533 /* We must init $/ before switches are processed. */
3534 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3537 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3539 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3544 const char *cpp_discard_flag;
3552 PL_origfilename = savepv("-e");
3555 /* if find_script() returns, it returns a malloc()-ed value */
3556 scriptname = PL_origfilename = find_script((char *)scriptname, dosearch, NULL, 1);
3558 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3559 const char *s = scriptname + 8;
3560 PL_fdscript = atoi(s);
3565 * Tell apart "normal" usage of fdscript, e.g.
3566 * with bash on FreeBSD:
3567 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3568 * from usage in suidperl.
3569 * Does any "normal" usage leave garbage after the number???
3570 * Is it a mistake to use a similar /dev/fd/ construct for
3575 * Be supersafe and do some sanity-checks.
3576 * Still, can we be sure we got the right thing?
3579 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3582 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3584 scriptname = savepv(s + 1);
3585 Safefree(PL_origfilename);
3586 PL_origfilename = (char *)scriptname;
3591 CopFILE_free(PL_curcop);
3592 CopFILE_set(PL_curcop, PL_origfilename);
3593 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3594 scriptname = (char *)"";
3595 if (PL_fdscript >= 0) {
3596 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3597 # if defined(HAS_FCNTL) && defined(F_SETFD)
3599 /* ensure close-on-exec */
3600 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3605 Perl_croak(aTHX_ "sperl needs fd script\n"
3606 "You should not call sperl directly; do you need to "
3607 "change a #! line\nfrom sperl to perl?\n");
3610 * Do not open (or do other fancy stuff) while setuid.
3611 * Perl does the open, and hands script to suidperl on a fd;
3612 * suidperl only does some checks, sets up UIDs and re-execs
3613 * perl with that fd as it has always done.
3616 if (PL_suidscript != 1) {
3617 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3620 else if (PL_preprocess) {
3621 const char *cpp_cfg = CPPSTDIN;
3622 SV *cpp = newSVpvn("",0);
3623 SV *cmd = NEWSV(0,0);
3625 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3626 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3627 if (strEQ(cpp_cfg, "cppstdin"))
3628 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3629 sv_catpv(cpp, cpp_cfg);
3632 sv_catpvn(sv, "-I", 2);
3633 sv_catpv(sv,PRIVLIB_EXP);
3636 DEBUG_P(PerlIO_printf(Perl_debug_log,
3637 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3638 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3641 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3648 cpp_discard_flag = "";
3650 cpp_discard_flag = "-C";
3654 perl = os2_execname(aTHX);
3656 perl = PL_origargv[0];
3660 /* This strips off Perl comments which might interfere with
3661 the C pre-processor, including #!. #line directives are
3662 deliberately stripped to avoid confusion with Perl's version
3663 of #line. FWP played some golf with it so it will fit
3664 into VMS's 255 character buffer.
3667 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3669 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3671 Perl_sv_setpvf(aTHX_ cmd, "\
3672 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3673 perl, quote, code, quote, scriptname, cpp,
3674 cpp_discard_flag, sv, CPPMINUS);
3676 PL_doextract = FALSE;
3678 DEBUG_P(PerlIO_printf(Perl_debug_log,
3679 "PL_preprocess: cmd=\"%s\"\n",
3682 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3686 else if (!*scriptname) {
3687 forbid_setid("program input from stdin");
3688 PL_rsfp = PerlIO_stdin();
3691 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3692 # if defined(HAS_FCNTL) && defined(F_SETFD)
3694 /* ensure close-on-exec */
3695 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3698 #endif /* IAMSUID */
3700 /* PSz 16 Sep 03 Keep neat error message */
3702 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3704 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3705 CopFILE(PL_curcop), Strerror(errno));
3710 * I_SYSSTATVFS HAS_FSTATVFS
3712 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3713 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3714 * here so that metaconfig picks them up. */
3718 S_fd_on_nosuid_fs(pTHX_ int fd)
3721 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3722 * but is needed also on machines without setreuid.
3723 * Seems safe enough to run as root.
3725 int check_okay = 0; /* able to do all the required sys/libcalls */
3726 int on_nosuid = 0; /* the fd is on a nosuid fs */
3728 * Need to check noexec also: nosuid might not be set, the average
3729 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3731 int on_noexec = 0; /* the fd is on a noexec fs */
3734 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3735 * fstatvfs() is UNIX98.
3736 * fstatfs() is 4.3 BSD.
3737 * ustat()+getmnt() is pre-4.3 BSD.
3738 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3739 * an irrelevant filesystem while trying to reach the right one.
3742 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3744 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3745 defined(HAS_FSTATVFS)
3746 # define FD_ON_NOSUID_CHECK_OKAY
3747 struct statvfs stfs;
3749 check_okay = fstatvfs(fd, &stfs) == 0;
3750 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3752 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3753 on platforms where it is present. */
3754 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3756 # endif /* fstatvfs */
3758 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3759 defined(PERL_MOUNT_NOSUID) && \
3760 defined(PERL_MOUNT_NOEXEC) && \
3761 defined(HAS_FSTATFS) && \
3762 defined(HAS_STRUCT_STATFS) && \
3763 defined(HAS_STRUCT_STATFS_F_FLAGS)
3764 # define FD_ON_NOSUID_CHECK_OKAY
3767 check_okay = fstatfs(fd, &stfs) == 0;
3768 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3769 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3770 # endif /* fstatfs */
3772 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3773 defined(PERL_MOUNT_NOSUID) && \
3774 defined(PERL_MOUNT_NOEXEC) && \
3775 defined(HAS_FSTAT) && \
3776 defined(HAS_USTAT) && \
3777 defined(HAS_GETMNT) && \
3778 defined(HAS_STRUCT_FS_DATA) && \
3780 # define FD_ON_NOSUID_CHECK_OKAY
3783 if (fstat(fd, &fdst) == 0) {
3785 if (ustat(fdst.st_dev, &us) == 0) {
3787 /* NOSTAT_ONE here because we're not examining fields which
3788 * vary between that case and STAT_ONE. */
3789 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3790 size_t cmplen = sizeof(us.f_fname);
3791 if (sizeof(fsd.fd_req.path) < cmplen)
3792 cmplen = sizeof(fsd.fd_req.path);
3793 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3794 fdst.st_dev == fsd.fd_req.dev) {
3796 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3797 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3803 # endif /* fstat+ustat+getmnt */
3805 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3806 defined(HAS_GETMNTENT) && \
3807 defined(HAS_HASMNTOPT) && \
3808 defined(MNTOPT_NOSUID) && \
3809 defined(MNTOPT_NOEXEC)
3810 # define FD_ON_NOSUID_CHECK_OKAY
3811 FILE *mtab = fopen("/etc/mtab", "r");
3812 struct mntent *entry;
3815 if (mtab && (fstat(fd, &stb) == 0)) {
3816 while (entry = getmntent(mtab)) {
3817 if (stat(entry->mnt_dir, &fsb) == 0
3818 && fsb.st_dev == stb.st_dev)
3820 /* found the filesystem */
3822 if (hasmntopt(entry, MNTOPT_NOSUID))
3824 if (hasmntopt(entry, MNTOPT_NOEXEC))
3827 } /* A single fs may well fail its stat(). */
3832 # endif /* getmntent+hasmntopt */
3835 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3837 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3839 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3840 return ((!check_okay) || on_nosuid || on_noexec);
3842 #endif /* IAMSUID */
3845 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3849 #endif /* IAMSUID */
3851 /* do we need to emulate setuid on scripts? */
3853 /* This code is for those BSD systems that have setuid #! scripts disabled
3854 * in the kernel because of a security problem. Merely defining DOSUID
3855 * in perl will not fix that problem, but if you have disabled setuid
3856 * scripts in the kernel, this will attempt to emulate setuid and setgid
3857 * on scripts that have those now-otherwise-useless bits set. The setuid
3858 * root version must be called suidperl or sperlN.NNN. If regular perl
3859 * discovers that it has opened a setuid script, it calls suidperl with
3860 * the same argv that it had. If suidperl finds that the script it has
3861 * just opened is NOT setuid root, it sets the effective uid back to the
3862 * uid. We don't just make perl setuid root because that loses the
3863 * effective uid we had before invoking perl, if it was different from the
3866 * Description/comments above do not match current workings:
3867 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3868 * suidperl called with script open and name changed to /dev/fd/N/X;
3869 * suidperl croaks if script is not setuid;
3870 * making perl setuid would be a huge security risk (and yes, that
3871 * would lose any euid we might have had).
3873 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3874 * be defined in suidperl only. suidperl must be setuid root. The
3875 * Configure script will set this up for you if you want it.
3881 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3882 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3883 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3885 const char *linestr;
3888 if (PL_fdscript < 0 || PL_suidscript != 1)
3889 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3891 * Since the script is opened by perl, not suidperl, some of these
3892 * checks are superfluous. Leaving them in probably does not lower
3896 * Do checks even for systems with no HAS_SETREUID.
3897 * We used to swap, then re-swap UIDs with
3899 if (setreuid(PL_euid,PL_uid) < 0
3900 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3901 Perl_croak(aTHX_ "Can't swap uid and euid");
3904 if (setreuid(PL_uid,PL_euid) < 0
3905 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3906 Perl_croak(aTHX_ "Can't reswap uid and euid");
3910 /* On this access check to make sure the directories are readable,
3911 * there is actually a small window that the user could use to make
3912 * filename point to an accessible directory. So there is a faint
3913 * chance that someone could execute a setuid script down in a
3914 * non-accessible directory. I don't know what to do about that.
3915 * But I don't think it's too important. The manual lies when
3916 * it says access() is useful in setuid programs.
3918 * So, access() is pretty useless... but not harmful... do anyway.
3920 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3921 Perl_croak(aTHX_ "Can't access() script\n");
3924 /* If we can swap euid and uid, then we can determine access rights
3925 * with a simple stat of the file, and then compare device and
3926 * inode to make sure we did stat() on the same file we opened.
3927 * Then we just have to make sure he or she can execute it.
3930 * As the script is opened by perl, not suidperl, we do not need to
3931 * care much about access rights.
3933 * The 'script changed' check is needed, or we can get lied to
3934 * about $0 with e.g.
3935 * suidperl /dev/fd/4//bin/x 4<setuidscript
3936 * Without HAS_SETREUID, is it safe to stat() as root?
3938 * Are there any operating systems that pass /dev/fd/xxx for setuid
3939 * scripts, as suggested/described in perlsec(1)? Surely they do not
3940 * pass the script name as we do, so the "script changed" test would
3941 * fail for them... but we never get here with
3942 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3944 * This is one place where we must "lie" about return status: not
3945 * say if the stat() failed. We are doing this as root, and could
3946 * be tricked into reporting existence or not of files that the
3947 * "plain" user cannot even see.
3951 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3952 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3953 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3954 Perl_croak(aTHX_ "Setuid script changed\n");
3958 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3959 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3962 * We used to do this check as the "plain" user (after swapping
3963 * UIDs). But the check for nosuid and noexec filesystem is needed,
3964 * and should be done even without HAS_SETREUID. (Maybe those
3965 * operating systems do not have such mount options anyway...)
3966 * Seems safe enough to do as root.
3968 #if !defined(NO_NOSUID_CHECK)
3969 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3970 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3973 #endif /* IAMSUID */
3975 if (!S_ISREG(PL_statbuf.st_mode)) {
3976 Perl_croak(aTHX_ "Setuid script not plain file\n");
3978 if (PL_statbuf.st_mode & S_IWOTH)
3979 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3980 PL_doswitches = FALSE; /* -s is insecure in suid */
3981 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3982 CopLINE_inc(PL_curcop);
3983 linestr = SvPV_nolen_const(PL_linestr);
3984 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3985 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3986 Perl_croak(aTHX_ "No #! line");
3990 /* Sanity check on line length */
3991 if (strlen(s) < 1 || strlen(s) > 4000)
3992 Perl_croak(aTHX_ "Very long #! line");
3993 /* Allow more than a single space after #! */
3994 while (isSPACE(*s)) s++;
3995 /* Sanity check on buffer end */
3996 while ((*s) && !isSPACE(*s)) s++;
3997 for (s2 = s; (s2 > linestr &&
3998 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3999 || s2[-1] == '-')); s2--) ;
4000 /* Sanity check on buffer start */
4001 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4002 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4003 Perl_croak(aTHX_ "Not a perl script");
4004 while (*s == ' ' || *s == '\t') s++;
4006 * #! arg must be what we saw above. They can invoke it by
4007 * mentioning suidperl explicitly, but they may not add any strange
4008 * arguments beyond what #! says if they do invoke suidperl that way.
4011 * The way validarg was set up, we rely on the kernel to start
4012 * scripts with argv[1] set to contain all #! line switches (the
4016 * Check that we got all the arguments listed in the #! line (not
4017 * just that there are no extraneous arguments). Might not matter
4018 * much, as switches from #! line seem to be acted upon (also), and
4019 * so may be checked and trapped in perl. But, security checks must
4020 * be done in suidperl and not deferred to perl. Note that suidperl
4021 * does not get around to parsing (and checking) the switches on
4022 * the #! line (but execs perl sooner).
4023 * Allow (require) a trailing newline (which may be of two
4024 * characters on some architectures?) (but no other trailing
4027 len = strlen(validarg);
4028 if (strEQ(validarg," PHOOEY ") ||
4029 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4030 !(strlen(s) == len+1 || (strlen(s) == len+2 && isSPACE(s[len+1]))))
4031 Perl_croak(aTHX_ "Args must match #! line");
4034 if (PL_fdscript < 0 &&
4035 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4036 PL_euid == PL_statbuf.st_uid)
4038 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4039 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4040 #endif /* IAMSUID */
4042 if (PL_fdscript < 0 &&
4043 PL_euid) { /* oops, we're not the setuid root perl */
4045 * When root runs a setuid script, we do not go through the same
4046 * steps of execing sperl and then perl with fd scripts, but
4047 * simply set up UIDs within the same perl invocation; so do
4048 * not have the same checks (on options, whatever) that we have
4049 * for plain users. No problem really: would have to be a script
4050 * that does not actually work for plain users; and if root is
4051 * foolish and can be persuaded to run such an unsafe script, he
4052 * might run also non-setuid ones, and deserves what he gets.
4054 * Or, we might drop the PL_euid check above (and rely just on
4055 * PL_fdscript to avoid loops), and do the execs
4061 * Pass fd script to suidperl.
4062 * Exec suidperl, substituting fd script for scriptname.
4063 * Pass script name as "subdir" of fd, which perl will grok;
4064 * in fact will use that to distinguish this from "normal"
4065 * usage, see comments above.
4067 PerlIO_rewind(PL_rsfp);
4068 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4069 /* PSz 27 Feb 04 Sanity checks on scriptname */
4070 if ((!scriptname) || (!*scriptname) ) {
4071 Perl_croak(aTHX_ "No setuid script name\n");
4073 if (*scriptname == '-') {
4074 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4075 /* Or we might confuse it with an option when replacing
4076 * name in argument list, below (though we do pointer, not
4077 * string, comparisons).
4080 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4081 if (!PL_origargv[which]) {
4082 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4084 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4085 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4086 #if defined(HAS_FCNTL) && defined(F_SETFD)
4087 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4090 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4091 (int)PERL_REVISION, (int)PERL_VERSION,
4092 (int)PERL_SUBVERSION), PL_origargv);
4094 #endif /* IAMSUID */
4095 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4098 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4100 * This seems back to front: we try HAS_SETEGID first; if not available
4101 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4102 * in the sense that we only want to set EGID; but are there any machines
4103 * with either of the latter, but not the former? Same with UID, later.
4106 (void)setegid(PL_statbuf.st_gid);
4109 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4111 #ifdef HAS_SETRESGID
4112 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4114 PerlProc_setgid(PL_statbuf.st_gid);
4118 if (PerlProc_getegid() != PL_statbuf.st_gid)
4119 Perl_croak(aTHX_ "Can't do setegid!\n");
4121 if (PL_statbuf.st_mode & S_ISUID) {
4122 if (PL_statbuf.st_uid != PL_euid)
4124 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4127 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4129 #ifdef HAS_SETRESUID
4130 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4132 PerlProc_setuid(PL_statbuf.st_uid);
4136 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4137 Perl_croak(aTHX_ "Can't do seteuid!\n");
4139 else if (PL_uid) { /* oops, mustn't run as root */
4141 (void)seteuid((Uid_t)PL_uid);
4144 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4146 #ifdef HAS_SETRESUID
4147 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4149 PerlProc_setuid((Uid_t)PL_uid);
4153 if (PerlProc_geteuid() != PL_uid)
4154 Perl_croak(aTHX_ "Can't do seteuid!\n");
4157 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4158 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4161 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4162 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4163 else if (PL_fdscript < 0 || PL_suidscript != 1)
4164 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4165 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4167 /* PSz 16 Sep 03 Keep neat error message */
4168 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4171 /* We absolutely must clear out any saved ids here, so we */
4172 /* exec the real perl, substituting fd script for scriptname. */
4173 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4175 * It might be thought that using setresgid and/or setresuid (changed to
4176 * set the saved IDs) above might obviate the need to exec, and we could
4177 * go on to "do the perl thing".
4179 * Is there such a thing as "saved GID", and is that set for setuid (but
4180 * not setgid) execution like suidperl? Without exec, it would not be
4181 * cleared for setuid (but not setgid) scripts (or might need a dummy
4184 * We need suidperl to do the exact same argument checking that perl
4185 * does. Thus it cannot be very small; while it could be significantly
4186 * smaller, it is safer (simpler?) to make it essentially the same
4187 * binary as perl (but they are not identical). - Maybe could defer that
4188 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4189 * but prefer to do thorough checks in suidperl itself. Such deferral
4190 * would make suidperl security rely on perl, a design no-no.
4192 * Setuid things should be short and simple, thus easy to understand and
4193 * verify. They should do their "own thing", without influence by
4194 * attackers. It may help if their internal execution flow is fixed,
4195 * regardless of platform: it may be best to exec anyway.
4197 * Suidperl should at least be conceptually simple: a wrapper only,
4198 * never to do any real perl. Maybe we should put
4200 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4202 * into the perly bits.
4204 PerlIO_rewind(PL_rsfp);
4205 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4207 * Keep original arguments: suidperl already has fd script.
4209 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4210 /* if (!PL_origargv[which]) { */
4211 /* errno = EPERM; */
4212 /* Perl_croak(aTHX_ "Permission denied\n"); */
4214 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4215 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4216 #if defined(HAS_FCNTL) && defined(F_SETFD)
4217 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4220 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4221 (int)PERL_REVISION, (int)PERL_VERSION,
4222 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4224 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4225 #endif /* IAMSUID */
4227 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4228 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4229 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4230 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4232 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4235 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4236 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4237 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4238 /* not set-id, must be wrapped */
4246 S_find_beginning(pTHX)
4249 register const char *s2;
4250 #ifdef MACOS_TRADITIONAL
4254 /* skip forward in input to the real script? */
4257 #ifdef MACOS_TRADITIONAL
4258 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4260 while (PL_doextract || gMacPerl_AlwaysExtract) {
4261 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
4262 if (!gMacPerl_AlwaysExtract)
4263 Perl_croak(aTHX_ "No Perl script found in input\n");
4265 if (PL_doextract) /* require explicit override ? */
4266 if (!OverrideExtract(PL_origfilename))
4267 Perl_croak(aTHX_ "User aborted script\n");
4269 PL_doextract = FALSE;
4271 /* Pater peccavi, file does not have #! */
4272 PerlIO_rewind(PL_rsfp);
4277 while (PL_doextract) {
4278 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
4279 Perl_croak(aTHX_ "No Perl script found in input\n");
4282 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4283 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4284 PL_doextract = FALSE;
4285 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4287 while (*s == ' ' || *s == '\t') s++;
4289 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4290 || s2[-1] == '_') s2--;
4291 if (strnEQ(s2-4,"perl",4))
4292 while ((s = moreswitches(s)))
4295 #ifdef MACOS_TRADITIONAL
4296 /* We are always searching for the #!perl line in MacPerl,
4297 * so if we find it, still keep the line count correct
4298 * by counting lines we already skipped over
4300 for (; maclines > 0 ; maclines--)
4301 PerlIO_ungetc(PL_rsfp, '\n');
4305 /* gMacPerl_AlwaysExtract is false in MPW tool */
4306 } else if (gMacPerl_AlwaysExtract) {
4317 PL_uid = PerlProc_getuid();
4318 PL_euid = PerlProc_geteuid();
4319 PL_gid = PerlProc_getgid();
4320 PL_egid = PerlProc_getegid();
4322 PL_uid |= PL_gid << 16;
4323 PL_euid |= PL_egid << 16;
4325 /* Should not happen: */
4326 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4327 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4330 * Should go by suidscript, not uid!=euid: why disallow
4331 * system("ls") in scripts run from setuid things?
4332 * Or, is this run before we check arguments and set suidscript?
4333 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4334 * (We never have suidscript, can we be sure to have fdscript?)
4335 * Or must then go by UID checks? See comments in forbid_setid also.
4339 /* This is used very early in the lifetime of the program,
4340 * before even the options are parsed, so PL_tainting has
4341 * not been initialized properly. */
4343 Perl_doing_taint(int argc, char *argv[], char *envp[])
4345 #ifndef PERL_IMPLICIT_SYS
4346 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4347 * before we have an interpreter-- and the whole point of this
4348 * function is to be called at such an early stage. If you are on
4349 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4350 * "tainted because running with altered effective ids', you'll
4351 * have to add your own checks somewhere in here. The two most
4352 * known samples of 'implicitness' are Win32 and NetWare, neither
4353 * of which has much of concept of 'uids'. */
4354 int uid = PerlProc_getuid();
4355 int euid = PerlProc_geteuid();
4356 int gid = PerlProc_getgid();
4357 int egid = PerlProc_getegid();
4364 if (uid && (euid != uid || egid != gid))
4366 #endif /* !PERL_IMPLICIT_SYS */
4367 /* This is a really primitive check; environment gets ignored only
4368 * if -T are the first chars together; otherwise one gets
4369 * "Too late" message. */
4370 if ( argc > 1 && argv[1][0] == '-'
4371 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4377 S_forbid_setid(pTHX_ const char *s)
4379 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4380 if (PL_euid != PL_uid)
4381 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4382 if (PL_egid != PL_gid)
4383 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4384 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4386 * Checks for UID/GID above "wrong": why disallow
4387 * perl -e 'print "Hello\n"'
4388 * from within setuid things?? Simply drop them: replaced by
4389 * fdscript/suidscript and #ifdef IAMSUID checks below.
4391 * This may be too late for command-line switches. Will catch those on
4392 * the #! line, after finding the script name and setting up
4393 * fdscript/suidscript. Note that suidperl does not get around to
4394 * parsing (and checking) the switches on the #! line, but checks that
4395 * the two sets are identical.
4397 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4398 * instead, or would that be "too late"? (We never have suidscript, can
4399 * we be sure to have fdscript?)
4401 * Catch things with suidscript (in descendant of suidperl), even with
4402 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4403 * below; but I am paranoid.
4405 * Also see comments about root running a setuid script, elsewhere.
4407 if (PL_suidscript >= 0)
4408 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4410 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4411 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4412 #endif /* IAMSUID */
4416 Perl_init_debugger(pTHX)
4418 HV *ostash = PL_curstash;
4420 PL_curstash = PL_debstash;
4421 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4422 AvREAL_off(PL_dbargs);
4423 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4424 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4425 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4426 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4427 sv_setiv(PL_DBsingle, 0);
4428 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4429 sv_setiv(PL_DBtrace, 0);
4430 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4431 sv_setiv(PL_DBsignal, 0);
4432 PL_curstash = ostash;
4435 #ifndef STRESS_REALLOC
4436 #define REASONABLE(size) (size)
4438 #define REASONABLE(size) (1) /* unreasonable */
4442 Perl_init_stacks(pTHX)
4444 /* start with 128-item stack and 8K cxstack */
4445 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4446 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4447 PL_curstackinfo->si_type = PERLSI_MAIN;
4448 PL_curstack = PL_curstackinfo->si_stack;
4449 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4451 PL_stack_base = AvARRAY(PL_curstack);
4452 PL_stack_sp = PL_stack_base;
4453 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4455 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4458 PL_tmps_max = REASONABLE(128);
4460 Newx(PL_markstack,REASONABLE(32),I32);
4461 PL_markstack_ptr = PL_markstack;
4462 PL_markstack_max = PL_markstack + REASONABLE(32);
4466 Newx(PL_scopestack,REASONABLE(32),I32);
4467 PL_scopestack_ix = 0;
4468 PL_scopestack_max = REASONABLE(32);
4470 Newx(PL_savestack,REASONABLE(128),ANY);
4471 PL_savestack_ix = 0;
4472 PL_savestack_max = REASONABLE(128);
4474 New(54,PL_retstack,REASONABLE(16),OP*);
4476 PL_retstack_max = REASONABLE(16);
4484 while (PL_curstackinfo->si_next)
4485 PL_curstackinfo = PL_curstackinfo->si_next;
4486 while (PL_curstackinfo) {
4487 PERL_SI *p = PL_curstackinfo->si_prev;
4488 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4489 Safefree(PL_curstackinfo->si_cxstack);
4490 Safefree(PL_curstackinfo);
4491 PL_curstackinfo = p;
4493 Safefree(PL_tmps_stack);
4494 Safefree(PL_markstack);
4495 Safefree(PL_scopestack);
4496 Safefree(PL_savestack);
4497 Safefree(PL_retstack);
4506 lex_start(PL_linestr);
4508 PL_subname = newSVpvn("main",4);
4512 S_init_predump_symbols(pTHX)
4517 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4518 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4519 GvMULTI_on(PL_stdingv);
4520 io = GvIOp(PL_stdingv);
4521 IoTYPE(io) = IoTYPE_RDONLY;
4522 IoIFP(io) = PerlIO_stdin();
4523 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4525 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4527 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4530 IoTYPE(io) = IoTYPE_WRONLY;
4531 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4533 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4535 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4537 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4538 GvMULTI_on(PL_stderrgv);
4539 io = GvIOp(PL_stderrgv);
4540 IoTYPE(io) = IoTYPE_WRONLY;
4541 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4542 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4544 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4546 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4548 Safefree(PL_osname);
4549 PL_osname = savepv(OSNAME);
4553 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4555 argc--,argv++; /* skip name of script */
4556 if (PL_doswitches) {
4557 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4561 if (argv[0][1] == '-' && !argv[0][2]) {
4565 if ((s = strchr(argv[0], '='))) {
4567 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4570 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4573 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4574 GvMULTI_on(PL_argvgv);
4575 (void)gv_AVadd(PL_argvgv);
4576 av_clear(GvAVn(PL_argvgv));
4577 for (; argc > 0; argc--,argv++) {
4578 SV * const sv = newSVpv(argv[0],0);
4579 av_push(GvAVn(PL_argvgv),sv);
4580 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4581 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4584 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4585 (void)sv_utf8_decode(sv);
4590 #ifdef HAS_PROCSELFEXE
4591 /* This is a function so that we don't hold on to MAXPATHLEN
4592 bytes of stack longer than necessary
4595 S_procself_val(pTHX_ SV *sv, char *arg0)
4597 char buf[MAXPATHLEN];
4598 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
4600 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
4601 includes a spurious NUL which will cause $^X to fail in system
4602 or backticks (this will prevent extensions from being built and
4603 many tests from working). readlink is not meant to add a NUL.
4604 Normal readlink works fine.
4606 if (len > 0 && buf[len-1] == '\0') {
4610 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
4611 returning the text "unknown" from the readlink rather than the path
4612 to the executable (or returning an error from the readlink). Any valid
4613 path has a '/' in it somewhere, so use that to validate the result.
4614 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
4616 if (len > 0 && memchr(buf, '/', len)) {
4617 sv_setpvn(sv,buf,len);
4623 #endif /* HAS_PROCSELFEXE */
4626 S_set_caret_X(pTHX) {
4627 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
4629 #ifdef HAS_PROCSELFEXE
4630 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
4633 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
4635 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
4642 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4646 PL_toptarget = NEWSV(0,0);
4647 sv_upgrade(PL_toptarget, SVt_PVFM);
4648 sv_setpvn(PL_toptarget, "", 0);
4649 PL_bodytarget = NEWSV(0,0);
4650 sv_upgrade(PL_bodytarget, SVt_PVFM);
4651 sv_setpvn(PL_bodytarget, "", 0);
4652 PL_formtarget = PL_bodytarget;
4656 init_argv_symbols(argc,argv);
4658 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4659 #ifdef MACOS_TRADITIONAL
4660 /* $0 is not majick on a Mac */
4661 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4663 sv_setpv(GvSV(tmpgv),PL_origfilename);
4664 magicname("0", "0", 1);
4667 S_set_caret_X(aTHX);
4668 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4670 GvMULTI_on(PL_envgv);
4671 hv = GvHVn(PL_envgv);
4672 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4674 #ifdef USE_ENVIRON_ARRAY
4675 /* Note that if the supplied env parameter is actually a copy
4676 of the global environ then it may now point to free'd memory
4677 if the environment has been modified since. To avoid this
4678 problem we treat env==NULL as meaning 'use the default'
4683 # ifdef USE_ITHREADS
4684 && PL_curinterp == aTHX
4688 environ[0] = Nullch;
4691 char** origenv = environ;
4694 for (; *env; env++) {
4695 if (!(s = strchr(*env,'=')) || s == *env)
4697 #if defined(MSDOS) && !defined(DJGPP)
4702 sv = newSVpv(s+1, 0);
4703 (void)hv_store(hv, *env, s - *env, sv, 0);
4706 if (origenv != environ) {
4707 /* realloc has shifted us */
4708 env = (env - origenv) + environ;
4713 #endif /* USE_ENVIRON_ARRAY */
4714 #endif /* !PERL_MICRO */
4717 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4718 SvREADONLY_off(GvSV(tmpgv));
4719 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4720 SvREADONLY_on(GvSV(tmpgv));
4722 #ifdef THREADS_HAVE_PIDS
4723 PL_ppid = (IV)getppid();
4726 /* touch @F array to prevent spurious warnings 20020415 MJD */
4728 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4730 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4731 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4732 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4736 S_init_perllib(pTHX)
4741 s = PerlEnv_getenv("PERL5LIB");
4743 * It isn't possible to delete an environment variable with
4744 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4745 * case we treat PERL5LIB as undefined if it has a zero-length value.
4747 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4748 if (s && *s != '\0')
4752 incpush(s, TRUE, TRUE, TRUE);
4754 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE);
4756 /* Treat PERL5?LIB as a possible search list logical name -- the
4757 * "natural" VMS idiom for a Unix path string. We allow each
4758 * element to be a set of |-separated directories for compatibility.
4762 if (my_trnlnm("PERL5LIB",buf,0))
4763 do { incpush(buf,TRUE,TRUE,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4765 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE);
4769 /* Use the ~-expanded versions of APPLLIB (undocumented),
4770 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4773 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE);
4777 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE);
4779 #ifdef MACOS_TRADITIONAL
4782 SV * privdir = NEWSV(55, 0);
4783 char * macperl = PerlEnv_getenv("MACPERL");
4788 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4789 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4790 incpush(SvPVX(privdir), TRUE, FALSE, TRUE);
4791 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4792 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4793 incpush(SvPVX(privdir), TRUE, FALSE, TRUE);
4795 SvREFCNT_dec(privdir);
4798 incpush(":", FALSE, FALSE, TRUE);
4801 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4804 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE);
4806 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE);
4810 /* sitearch is always relative to sitelib on Windows for
4811 * DLL-based path intuition to work correctly */
4812 # if !defined(WIN32)
4813 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE);
4819 /* this picks up sitearch as well */
4820 incpush(SITELIB_EXP, TRUE, FALSE, TRUE);
4822 incpush(SITELIB_EXP, FALSE, FALSE, TRUE);
4826 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4827 incpush(SITELIB_STEM, FALSE, TRUE, TRUE);
4830 #ifdef PERL_VENDORARCH_EXP
4831 /* vendorarch is always relative to vendorlib on Windows for
4832 * DLL-based path intuition to work correctly */
4833 # if !defined(WIN32)
4834 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE);
4838 #ifdef PERL_VENDORLIB_EXP
4840 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE); /* this picks up vendorarch as well */
4842 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE);
4846 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4847 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE);
4850 #ifdef PERL_OTHERLIBDIRS
4851 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE);
4855 incpush(".", FALSE, FALSE, TRUE);
4856 #endif /* MACOS_TRADITIONAL */
4859 #if defined(DOSISH) || defined(EPOC) || defined(SYMBIAN)
4860 # define PERLLIB_SEP ';'
4863 # define PERLLIB_SEP '|'
4865 # if defined(MACOS_TRADITIONAL)
4866 # define PERLLIB_SEP ','
4868 # define PERLLIB_SEP ':'
4872 #ifndef PERLLIB_MANGLE
4873 # define PERLLIB_MANGLE(s,n) (s)
4876 /* Push a directory onto @INC if it exists.
4877 Generate a new SV if we do this, to save needing to copy the SV we push
4880 S_incpush_if_exists(pTHX_ SV *dir)
4883 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4884 S_ISDIR(tmpstatbuf.st_mode)) {
4885 av_push(GvAVn(PL_incgv), dir);
4892 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep)
4894 SV *subdir = Nullsv;
4895 const char *p = dir;
4900 if (addsubdirs || addoldvers) {
4901 subdir = NEWSV(0,0);
4904 /* Break at all separators */
4906 SV *libdir = NEWSV(55,0);
4909 /* skip any consecutive separators */
4911 while ( *p == PERLLIB_SEP ) {
4912 /* Uncomment the next line for PATH semantics */
4913 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4918 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4919 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4924 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4925 p = Nullch; /* break out */
4927 #ifdef MACOS_TRADITIONAL
4928 if (!strchr(SvPVX(libdir), ':')) {
4931 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4933 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4934 sv_catpv(libdir, ":");
4938 * BEFORE pushing libdir onto @INC we may first push version- and
4939 * archname-specific sub-directories.
4941 if (addsubdirs || addoldvers) {
4942 #ifdef PERL_INC_VERSION_LIST
4943 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4944 const char *incverlist[] = { PERL_INC_VERSION_LIST };
4945 const char **incver;
4951 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4953 while (unix[len-1] == '/') len--; /* Cosmetic */
4954 sv_usepvn(libdir,unix,len);
4957 PerlIO_printf(Perl_error_log,
4958 "Failed to unixify @INC element \"%s\"\n",
4962 #ifdef MACOS_TRADITIONAL
4963 #define PERL_AV_SUFFIX_FMT ""
4964 #define PERL_ARCH_FMT "%s:"
4965 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4967 #define PERL_AV_SUFFIX_FMT "/"
4968 #define PERL_ARCH_FMT "/%s"
4969 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4971 /* .../version/archname if -d .../version/archname */
4972 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4974 (int)PERL_REVISION, (int)PERL_VERSION,
4975 (int)PERL_SUBVERSION, ARCHNAME);
4976 subdir = S_incpush_if_exists(aTHX_ subdir);
4978 /* .../version if -d .../version */
4979 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4980 (int)PERL_REVISION, (int)PERL_VERSION,
4981 (int)PERL_SUBVERSION);
4982 subdir = S_incpush_if_exists(aTHX_ subdir);
4984 /* .../archname if -d .../archname */
4985 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4986 subdir = S_incpush_if_exists(aTHX_ subdir);
4990 #ifdef PERL_INC_VERSION_LIST
4992 for (incver = incverlist; *incver; incver++) {
4993 /* .../xxx if -d .../xxx */
4994 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4995 subdir = S_incpush_if_exists(aTHX_ subdir);
5001 /* finally push this lib directory on the end of @INC */
5002 av_push(GvAVn(PL_incgv), libdir);
5005 assert (SvREFCNT(subdir) == 1);
5006 SvREFCNT_dec(subdir);
5010 #ifdef USE_5005THREADS
5011 STATIC struct perl_thread *
5012 S_init_main_thread(pTHX)
5014 #if !defined(PERL_IMPLICIT_CONTEXT)
5015 struct perl_thread *thr;
5019 Newxz(thr, 1, struct perl_thread);
5020 PL_curcop = &PL_compiling;
5021 thr->interp = PERL_GET_INTERP;
5022 thr->cvcache = newHV();
5023 thr->threadsv = newAV();
5024 /* thr->threadsvp is set when find_threadsv is called */
5025 thr->specific = newAV();
5026 thr->flags = THRf_R_JOINABLE;
5027 MUTEX_INIT(&thr->mutex);
5028 /* Handcraft thrsv similarly to mess_sv */
5029 Newx(PL_thrsv, 1, SV);
5031 SvFLAGS(PL_thrsv) = SVt_PV;
5032 SvANY(PL_thrsv) = (void*)xpv;
5033 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
5034 SvPV_set(PL_thrsvr, (char*)thr);
5035 SvCUR_set(PL_thrsv, sizeof(thr));
5036 SvLEN_set(PL_thrsv, sizeof(thr));
5037 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
5038 thr->oursv = PL_thrsv;
5039 PL_chopset = " \n-";
5042 MUTEX_LOCK(&PL_threads_mutex);
5048 MUTEX_UNLOCK(&PL_threads_mutex);
5050 #ifdef HAVE_THREAD_INTERN
5051 Perl_init_thread_intern(thr);
5054 #ifdef SET_THREAD_SELF
5055 SET_THREAD_SELF(thr);
5057 thr->self = pthread_self();
5058 #endif /* SET_THREAD_SELF */
5062 * These must come after the thread self setting
5063 * because sv_setpvn does SvTAINT and the taint
5064 * fields thread selfness being set.
5066 PL_toptarget = NEWSV(0,0);
5067 sv_upgrade(PL_toptarget, SVt_PVFM);
5068 sv_setpvn(PL_toptarget, "", 0);
5069 PL_bodytarget = NEWSV(0,0);
5070 sv_upgrade(PL_bodytarget, SVt_PVFM);
5071 sv_setpvn(PL_bodytarget, "", 0);
5072 PL_formtarget = PL_bodytarget;
5073 thr->errsv = newSVpvn("", 0);
5074 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5077 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5078 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5079 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5080 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5081 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5082 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5084 PL_reginterp_cnt = 0;
5088 #endif /* USE_5005THREADS */
5091 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5094 const line_t oldline = CopLINE(PL_curcop);
5100 while (av_len(paramList) >= 0) {
5101 cv = (CV*)av_shift(paramList);
5103 if (paramList == PL_beginav) {
5104 /* save PL_beginav for compiler */
5105 if (! PL_beginav_save)
5106 PL_beginav_save = newAV();
5107 av_push(PL_beginav_save, (SV*)cv);
5109 else if (paramList == PL_checkav) {
5110 /* save PL_checkav for compiler */
5111 if (! PL_checkav_save)
5112 PL_checkav_save = newAV();
5113 av_push(PL_checkav_save, (SV*)cv);
5118 #ifdef PERL_FLEXIBLE_EXCEPTIONS
5119 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_list_body), cv);
5125 #ifndef PERL_FLEXIBLE_EXCEPTIONS
5129 (void)SvPV_const(atsv, len);
5131 PL_curcop = &PL_compiling;
5132 CopLINE_set(PL_curcop, oldline);
5133 if (paramList == PL_beginav)
5134 sv_catpv(atsv, "BEGIN failed--compilation aborted");
5136 Perl_sv_catpvf(aTHX_ atsv,
5137 "%s failed--call queue aborted",
5138 paramList == PL_checkav ? "CHECK"
5139 : paramList == PL_initav ? "INIT"
5141 while (PL_scopestack_ix > oldscope)
5144 Perl_croak(aTHX_ "%"SVf"", atsv);
5151 /* my_exit() was called */
5152 while (PL_scopestack_ix > oldscope)
5155 PL_curstash = PL_defstash;
5156 PL_curcop = &PL_compiling;
5157 CopLINE_set(PL_curcop, oldline);
5159 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5160 if (paramList == PL_beginav)
5161 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5163 Perl_croak(aTHX_ "%s failed--call queue aborted",
5164 paramList == PL_checkav ? "CHECK"
5165 : paramList == PL_initav ? "INIT"
5172 PL_curcop = &PL_compiling;
5173 CopLINE_set(PL_curcop, oldline);
5176 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5184 #ifdef PERL_FLEXIBLE_EXCEPTIONS
5186 S_vcall_list_body(pTHX_ va_list args)
5188 CV *cv = va_arg(args, CV*);
5189 return call_list_body(cv);
5194 S_call_list_body(pTHX_ CV *cv)
5196 PUSHMARK(PL_stack_sp);
5197 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5202 Perl_my_exit(pTHX_ U32 status)
5204 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5205 thr, (unsigned long) status));
5214 STATUS_NATIVE_SET(status);
5221 Perl_my_failure_exit(pTHX)
5224 if (vaxc$errno & 1) {
5225 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
5226 STATUS_NATIVE_SET(44);
5229 if (!vaxc$errno) /* unlikely */
5230 STATUS_NATIVE_SET(44);
5232 STATUS_NATIVE_SET(vaxc$errno);
5237 STATUS_POSIX_SET(errno);
5239 exitstatus = STATUS_POSIX >> 8;
5240 if (exitstatus & 255)
5241 STATUS_POSIX_SET(exitstatus);
5243 STATUS_POSIX_SET(255);
5250 S_my_exit_jump(pTHX)
5252 register PERL_CONTEXT *cx;
5257 SvREFCNT_dec(PL_e_script);
5258 PL_e_script = Nullsv;
5261 POPSTACK_TO(PL_mainstack);
5262 if (cxstack_ix >= 0) {
5265 POPBLOCK(cx,PL_curpm);
5270 PERL_UNUSED_VAR(gimme);
5271 PERL_UNUSED_VAR(newsp);
5275 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5277 const char * const p = SvPVX_const(PL_e_script);
5278 const char *nl = strchr(p, '\n');
5280 PERL_UNUSED_ARG(idx);
5281 PERL_UNUSED_ARG(maxlen);
5283 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5285 filter_del(read_e_script);
5288 sv_catpvn(buf_sv, p, nl-p);
5289 sv_chop(PL_e_script, (char *) nl);
5295 * c-indentation-style: bsd
5297 * indent-tabs-mode: t
5300 * ex: set ts=8 sts=4 sw=4 noet: