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
141 S_init_tls_and_interp(PerlInterpreter *my_perl)
144 PERL_SET_INTERP(my_perl);
145 #if defined(USE_5005THREADS)
149 # if defined(USE_ITHREADS)
152 PERL_SET_THX(my_perl);
154 MUTEX_INIT(&PL_dollarzero_mutex);
156 #if defined(USE_ITHREADS)
159 /* This always happens for non-ithreads */
162 PERL_SET_THX(my_perl);
168 #ifdef PERL_IMPLICIT_SYS
170 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
171 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
172 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
173 struct IPerlDir* ipD, struct IPerlSock* ipS,
174 struct IPerlProc* ipP)
176 PerlInterpreter *my_perl;
177 /* Newx() needs interpreter, so call malloc() instead */
178 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
179 S_init_tls_and_interp(my_perl);
180 Zero(my_perl, 1, PerlInterpreter);
190 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
197 =head1 Embedding Functions
199 =for apidoc perl_alloc
201 Allocates a new Perl interpreter. See L<perlembed>.
209 PerlInterpreter *my_perl;
210 #ifdef USE_5005THREADS
214 /* Newx() needs interpreter, so call malloc() instead */
215 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
217 S_init_tls_and_interp(my_perl);
218 #ifndef PERL_TRACK_MEMPOOL
219 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
221 Zero(my_perl, 1, PerlInterpreter);
222 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
226 #endif /* PERL_IMPLICIT_SYS */
229 =for apidoc perl_construct
231 Initializes a new Perl interpreter. See L<perlembed>.
237 perl_construct(pTHXx)
239 #ifdef USE_5005THREADS
241 struct perl_thread *thr = NULL;
242 #endif /* FAKE_THREADS */
243 #endif /* USE_5005THREADS */
245 PERL_UNUSED_ARG(my_perl);
248 PL_perl_destruct_level = 1;
250 if (PL_perl_destruct_level > 0)
253 /* Init the real globals (and main thread)? */
255 #ifdef USE_5005THREADS
256 MUTEX_INIT(&PL_sv_mutex);
258 * Safe to use basic SV functions from now on (though
259 * not things like mortals or tainting yet).
261 MUTEX_INIT(&PL_eval_mutex);
262 COND_INIT(&PL_eval_cond);
263 MUTEX_INIT(&PL_threads_mutex);
264 COND_INIT(&PL_nthreads_cond);
265 # ifdef EMULATE_ATOMIC_REFCOUNTS
266 MUTEX_INIT(&PL_svref_mutex);
267 # endif /* EMULATE_ATOMIC_REFCOUNTS */
269 MUTEX_INIT(&PL_cred_mutex);
270 MUTEX_INIT(&PL_sv_lock_mutex);
271 MUTEX_INIT(&PL_fdpid_mutex);
273 thr = init_main_thread();
274 #endif /* USE_5005THREADS */
276 #ifdef PERL_FLEXIBLE_EXCEPTIONS
277 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
280 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
282 PL_linestr = newSV(79);
283 sv_upgrade(PL_linestr,SVt_PVIV);
285 if (!SvREADONLY(&PL_sv_undef)) {
286 /* set read-only and try to insure than we wont see REFCNT==0
289 SvREADONLY_on(&PL_sv_undef);
290 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
292 sv_setpv(&PL_sv_no,PL_No);
293 /* value lookup in void context - happens to have the side effect
294 of caching the numeric forms. */
297 SvREADONLY_on(&PL_sv_no);
298 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
300 sv_setpv(&PL_sv_yes,PL_Yes);
303 SvREADONLY_on(&PL_sv_yes);
304 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
306 SvREADONLY_on(&PL_sv_placeholder);
307 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
310 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
311 PL_sighandlerp = (Sighandler_t) Perl_sighandler_va;
313 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
315 PL_pidstatus = newHV();
318 PL_rs = newSVpvs("\n");
323 PL_lex_state = LEX_NOTPARSING;
329 SET_NUMERIC_STANDARD();
333 PL_patchlevel = newSV(4);
334 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
335 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
336 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
337 s = (U8*)SvPVX(PL_patchlevel);
338 /* Build version strings using "native" characters */
339 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
340 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
341 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
343 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
344 SvPOK_on(PL_patchlevel);
345 SvNVX(PL_patchlevel) = (NV)PERL_REVISION +
346 ((NV)PERL_VERSION / (NV)1000) +
347 ((NV)PERL_SUBVERSION / (NV)1000000);
348 SvNOK_on(PL_patchlevel); /* dual valued */
349 SvUTF8_on(PL_patchlevel);
350 SvREADONLY_on(PL_patchlevel);
353 #if defined(LOCAL_PATCH_COUNT)
354 PL_localpatches = (char **) local_patches; /* For possible -v */
357 #ifdef HAVE_INTERP_INTERN
361 PerlIO_init(aTHX); /* Hook to IO system */
363 PL_fdpid = newAV(); /* for remembering popen pids by fd */
364 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
365 PL_errors = newSVpvs("");
366 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
367 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
368 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
370 PL_regex_padav = newAV();
371 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
372 PL_regex_pad = AvARRAY(PL_regex_padav);
374 #ifdef USE_REENTRANT_API
375 Perl_reentrant_init(aTHX);
378 /* Note that strtab is a rather special HV. Assumptions are made
379 about not iterating on it, and not adding tie magic to it.
380 It is properly deallocated in perl_destruct() */
383 #ifdef USE_5005THREADS
384 MUTEX_INIT(&PL_strtab_mutex);
386 HvSHAREKEYS_off(PL_strtab); /* mandatory */
387 hv_ksplit(PL_strtab, 512);
389 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
390 _dyld_lookup_and_bind
391 ("__environ", (unsigned long *) &environ_pointer, NULL);
395 # ifdef USE_ENVIRON_ARRAY
396 PL_origenviron = environ;
400 /* Use sysconf(_SC_CLK_TCK) if available, if not
401 * available or if the sysconf() fails, use the HZ.
402 * BeOS has those, but returns the wrong value.
403 * The HZ if not originally defined has been by now
404 * been defined as CLK_TCK, if available. */
405 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
406 PL_clocktick = sysconf(_SC_CLK_TCK);
407 if (PL_clocktick <= 0)
411 PL_stashcache = newHV();
417 =for apidoc nothreadhook
419 Stub that provides thread hook for perl_destruct when there are
426 Perl_nothreadhook(pTHX)
432 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
434 Perl_dump_sv_child(pTHX_ SV *sv)
437 const int sock = PL_dumper_fd;
438 const int debug_fd = PerlIO_fileno(Perl_debug_log);
439 union control_un control;
442 struct cmsghdr *cmptr;
444 unsigned char buffer[256];
446 if(sock == -1 || debug_fd == -1)
449 PerlIO_flush(Perl_debug_log);
451 /* All these shenanigans are to pass a file descriptor over to our child for
452 it to dump out to. We can't let it hold open the file descriptor when it
453 forks, as the file descriptor it will dump to can turn out to be one end
454 of pipe that some other process will wait on for EOF. (So as it would
455 be open, the wait would be forever. */
457 msg.msg_control = control.control;
458 msg.msg_controllen = sizeof(control.control);
459 /* We're a connected socket so we don't need a destination */
465 cmptr = CMSG_FIRSTHDR(&msg);
466 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
467 cmptr->cmsg_level = SOL_SOCKET;
468 cmptr->cmsg_type = SCM_RIGHTS;
469 *((int *)CMSG_DATA(cmptr)) = 1;
471 vec[0].iov_base = (void*)&sv;
472 vec[0].iov_len = sizeof(sv);
473 got = sendmsg(sock, &msg, 0);
476 perror("Debug leaking scalars parent sendmsg failed");
479 if(got < sizeof(sv)) {
480 perror("Debug leaking scalars parent short sendmsg");
484 /* Return protocol is
486 unsigned char: length of location string (0 for empty)
487 unsigned char*: string (not terminated)
489 vec[0].iov_base = (void*)&returned_errno;
490 vec[0].iov_len = sizeof(returned_errno);
491 vec[1].iov_base = buffer;
494 got = readv(sock, vec, 2);
497 perror("Debug leaking scalars parent read failed");
498 PerlIO_flush(PerlIO_stderr());
501 if(got < sizeof(returned_errno) + 1) {
502 perror("Debug leaking scalars parent short read");
503 PerlIO_flush(PerlIO_stderr());
508 got = read(sock, buffer + 1, *buffer);
510 perror("Debug leaking scalars parent read 2 failed");
511 PerlIO_flush(PerlIO_stderr());
516 perror("Debug leaking scalars parent short read 2");
517 PerlIO_flush(PerlIO_stderr());
522 if (returned_errno || *buffer) {
523 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
524 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
525 returned_errno, strerror(returned_errno));
531 =for apidoc perl_destruct
533 Shuts down a Perl interpreter. See L<perlembed>.
541 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
543 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
546 #ifdef USE_5005THREADS
549 #endif /* USE_5005THREADS */
551 PERL_UNUSED_ARG(my_perl);
553 /* wait for all pseudo-forked children to finish */
554 PERL_WAIT_FOR_CHILDREN;
556 #ifdef USE_5005THREADS
558 /* Pass 1 on any remaining threads: detach joinables, join zombies */
560 MUTEX_LOCK(&PL_threads_mutex);
561 DEBUG_S(PerlIO_printf(Perl_debug_log,
562 "perl_destruct: waiting for %d threads...\n",
564 for (t = thr->next; t != thr; t = t->next) {
565 MUTEX_LOCK(&t->mutex);
566 switch (ThrSTATE(t)) {
569 DEBUG_S(PerlIO_printf(Perl_debug_log,
570 "perl_destruct: joining zombie %p\n", t));
571 ThrSETSTATE(t, THRf_DEAD);
572 MUTEX_UNLOCK(&t->mutex);
575 * The SvREFCNT_dec below may take a long time (e.g. av
576 * may contain an object scalar whose destructor gets
577 * called) so we have to unlock threads_mutex and start
580 MUTEX_UNLOCK(&PL_threads_mutex);
582 SvREFCNT_dec((SV*)av);
583 DEBUG_S(PerlIO_printf(Perl_debug_log,
584 "perl_destruct: joined zombie %p OK\n", t));
586 case THRf_R_JOINABLE:
587 DEBUG_S(PerlIO_printf(Perl_debug_log,
588 "perl_destruct: detaching thread %p\n", t));
589 ThrSETSTATE(t, THRf_R_DETACHED);
591 * We unlock threads_mutex and t->mutex in the opposite order
592 * from which we locked them just so that DETACH won't
593 * deadlock if it panics. It's only a breach of good style
594 * not a bug since they are unlocks not locks.
596 MUTEX_UNLOCK(&PL_threads_mutex);
598 MUTEX_UNLOCK(&t->mutex);
601 DEBUG_S(PerlIO_printf(Perl_debug_log,
602 "perl_destruct: ignoring %p (state %u)\n",
604 MUTEX_UNLOCK(&t->mutex);
605 /* fall through and out */
608 /* We leave the above "Pass 1" loop with threads_mutex still locked */
610 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
611 while (PL_nthreads > 1)
613 DEBUG_S(PerlIO_printf(Perl_debug_log,
614 "perl_destruct: final wait for %d threads\n",
616 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
618 /* At this point, we're the last thread */
619 MUTEX_UNLOCK(&PL_threads_mutex);
620 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
621 MUTEX_DESTROY(&PL_threads_mutex);
622 COND_DESTROY(&PL_nthreads_cond);
624 #endif /* !defined(FAKE_THREADS) */
625 #endif /* USE_5005THREADS */
627 destruct_level = PL_perl_destruct_level;
630 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
632 const int i = atoi(s);
633 if (destruct_level < i)
639 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
645 if (PL_endav && !PL_minus_c)
646 call_list(PL_scopestack_ix, PL_endav);
652 /* Need to flush since END blocks can produce output */
655 if (CALL_FPTR(PL_threadhook)(aTHX)) {
656 /* Threads hook has vetoed further cleanup */
660 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
661 if (destruct_level != 0) {
662 /* Fork here to create a child. Our child's job is to preserve the
663 state of scalars prior to destruction, so that we can instruct it
664 to dump any scalars that we later find have leaked.
665 There's no subtlety in this code - it assumes POSIX, and it doesn't
669 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
670 perror("Debug leaking scalars socketpair failed");
676 perror("Debug leaking scalars fork failed");
680 /* We are the child */
681 const int sock = fd[1];
682 const int debug_fd = PerlIO_fileno(Perl_debug_log);
685 /* Our success message is an integer 0, and a char 0 */
686 static const char success[sizeof(int) + 1];
690 /* We need to close all other file descriptors otherwise we end up
691 with interesting hangs, where the parent closes its end of a
692 pipe, and sits waiting for (another) child to terminate. Only
693 that child never terminates, because it never gets EOF, because
694 we also have the far end of the pipe open. We even need to
695 close the debugging fd, because sometimes it happens to be one
696 end of a pipe, and a process is waiting on the other end for
697 EOF. Normally it would be closed at some point earlier in
698 destruction, but if we happen to cause the pipe to remain open,
699 EOF never occurs, and we get an infinite hang. Hence all the
700 games to pass in a file descriptor if it's actually needed. */
702 f = sysconf(_SC_OPEN_MAX);
704 where = "sysconf failed";
715 union control_un control;
718 struct cmsghdr *cmptr;
722 msg.msg_control = control.control;
723 msg.msg_controllen = sizeof(control.control);
724 /* We're a connected socket so we don't need a source */
728 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
730 vec[0].iov_base = (void*)⌖
731 vec[0].iov_len = sizeof(target);
733 got = recvmsg(sock, &msg, 0);
738 where = "recv failed";
741 if(got < sizeof(target)) {
742 where = "short recv";
746 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
750 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
751 where = "wrong cmsg_len";
754 if(cmptr->cmsg_level != SOL_SOCKET) {
755 where = "wrong cmsg_level";
758 if(cmptr->cmsg_type != SCM_RIGHTS) {
759 where = "wrong cmsg_type";
763 got_fd = *(int*)CMSG_DATA(cmptr);
764 /* For our last little bit of trickery, put the file descriptor
765 back into Perl_debug_log, as if we never actually closed it
767 if(got_fd != debug_fd) {
768 if (dup2(got_fd, debug_fd) == -1) {
775 PerlIO_flush(Perl_debug_log);
777 got = write(sock, &success, sizeof(success));
780 where = "write failed";
783 if(got < sizeof(success)) {
784 where = "short write";
791 int send_errno = errno;
792 unsigned char length = (unsigned char) strlen(where);
793 struct iovec failure[3] = {
794 {(void*)&send_errno, sizeof(send_errno)},
796 {(void*)where, length}
798 int got = writev(sock, failure, 3);
799 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
800 in the parent if we try to read from the socketpair after the
801 child has exited, even if there was data to read.
802 So sleep a bit to give the parent a fighting chance of
805 _exit((got == -1) ? errno : 0);
809 PL_dumper_fd = fd[0];
814 /* We must account for everything. */
816 /* Destroy the main CV and syntax tree */
817 /* Do this now, because destroying ops can cause new SVs to be generated
818 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
819 PL_curcop to point to a valid op from which the filename structure
821 PL_curcop = &PL_compiling;
823 /* ensure comppad/curpad to refer to main's pad */
824 if (CvPADLIST(PL_main_cv)) {
825 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
827 op_free(PL_main_root);
830 PL_main_start = NULL;
831 SvREFCNT_dec(PL_main_cv);
835 /* Tell PerlIO we are about to tear things apart in case
836 we have layers which are using resources that should
840 PerlIO_destruct(aTHX);
842 if (PL_sv_objcount) {
844 * Try to destruct global references. We do this first so that the
845 * destructors and destructees still exist. Some sv's might remain.
846 * Non-referenced objects are on their own.
850 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
851 PL_defoutgv = NULL; /* may have been freed */
854 /* unhook hooks which will soon be, or use, destroyed data */
855 SvREFCNT_dec(PL_warnhook);
857 SvREFCNT_dec(PL_diehook);
860 /* call exit list functions */
861 while (PL_exitlistlen-- > 0)
862 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
864 Safefree(PL_exitlist);
869 /* jettison our possibly duplicated environment */
870 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
871 * so we certainly shouldn't free it here
874 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
875 if (environ != PL_origenviron && !PL_use_safe_putenv
877 /* only main thread can free environ[0] contents */
878 && PL_curinterp == aTHX
884 for (i = 0; environ[i]; i++)
885 safesysfree(environ[i]);
887 /* Must use safesysfree() when working with environ. */
888 safesysfree(environ);
890 environ = PL_origenviron;
893 #endif /* !PERL_MICRO */
895 if (destruct_level == 0) {
897 DEBUG_P(debprofdump());
899 #if defined(PERLIO_LAYERS)
900 /* No more IO - including error messages ! */
901 PerlIO_cleanup(aTHX);
904 CopFILE_free(&PL_compiling);
905 CopSTASH_free(&PL_compiling);
907 /* The exit() function will do everything that needs doing. */
911 /* reset so print() ends up where we expect */
915 /* the syntax tree is shared between clones
916 * so op_free(PL_main_root) only ReREFCNT_dec's
917 * REGEXPs in the parent interpreter
918 * we need to manually ReREFCNT_dec for the clones
921 I32 i = AvFILLp(PL_regex_padav) + 1;
922 SV * const * const ary = AvARRAY(PL_regex_padav);
925 SV * const resv = ary[--i];
927 if (SvFLAGS(resv) & SVf_BREAK) {
928 /* this is PL_reg_curpm, already freed
929 * flag is set in regexec.c:S_regtry
931 SvFLAGS(resv) &= ~SVf_BREAK;
933 else if(SvREPADTMP(resv)) {
934 SvREPADTMP_off(resv);
936 else if(SvIOKp(resv)) {
937 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
942 SvREFCNT_dec(PL_regex_padav);
943 PL_regex_padav = NULL;
947 SvREFCNT_dec((SV*) PL_stashcache);
948 PL_stashcache = NULL;
950 /* loosen bonds of global variables */
953 (void)PerlIO_close(PL_rsfp);
957 /* Filters for program text */
958 SvREFCNT_dec(PL_rsfp_filters);
959 PL_rsfp_filters = NULL;
962 Safefree(PL_splitstr);
967 PL_preprocess = FALSE;
973 PL_doswitches = FALSE;
974 PL_dowarn = G_WARN_OFF;
975 PL_doextract = FALSE;
976 PL_sawampersand = FALSE; /* must save all match strings */
979 Safefree(PL_inplace);
981 SvREFCNT_dec(PL_patchlevel);
984 SvREFCNT_dec(PL_e_script);
990 /* magical thingies */
992 SvREFCNT_dec(PL_ofs_sv); /* $, */
995 SvREFCNT_dec(PL_ors_sv); /* $\ */
998 SvREFCNT_dec(PL_rs); /* $/ */
1001 PL_multiline = 0; /* $* */
1002 Safefree(PL_osname); /* $^O */
1005 SvREFCNT_dec(PL_statname);
1009 /* defgv, aka *_ should be taken care of elsewhere */
1011 /* clean up after study() */
1012 SvREFCNT_dec(PL_lastscream);
1013 PL_lastscream = NULL;
1014 Safefree(PL_screamfirst);
1016 Safefree(PL_screamnext);
1020 Safefree(PL_efloatbuf);
1021 PL_efloatbuf = NULL;
1024 /* startup and shutdown function lists */
1025 SvREFCNT_dec(PL_beginav);
1026 SvREFCNT_dec(PL_beginav_save);
1027 SvREFCNT_dec(PL_endav);
1028 SvREFCNT_dec(PL_checkav);
1029 SvREFCNT_dec(PL_checkav_save);
1030 SvREFCNT_dec(PL_initav);
1032 PL_beginav_save = NULL;
1035 PL_checkav_save = NULL;
1038 /* shortcuts just get cleared */
1044 PL_argvoutgv = NULL;
1047 PL_last_in_gv = NULL;
1059 SvREFCNT_dec(PL_argvout_stack);
1060 PL_argvout_stack = NULL;
1062 SvREFCNT_dec(PL_modglobal);
1063 PL_modglobal = NULL;
1064 SvREFCNT_dec(PL_preambleav);
1065 PL_preambleav = NULL;
1066 SvREFCNT_dec(PL_subname);
1068 SvREFCNT_dec(PL_linestr);
1070 SvREFCNT_dec(PL_pidstatus);
1071 PL_pidstatus = NULL;
1072 SvREFCNT_dec(PL_toptarget);
1073 PL_toptarget = NULL;
1074 SvREFCNT_dec(PL_bodytarget);
1075 PL_bodytarget = NULL;
1076 PL_formtarget = NULL;
1078 /* free locale stuff */
1079 #ifdef USE_LOCALE_COLLATE
1080 Safefree(PL_collation_name);
1081 PL_collation_name = NULL;
1084 #ifdef USE_LOCALE_NUMERIC
1085 Safefree(PL_numeric_name);
1086 PL_numeric_name = NULL;
1087 SvREFCNT_dec(PL_numeric_radix_sv);
1088 PL_numeric_radix_sv = NULL;
1091 /* clear utf8 character classes */
1092 SvREFCNT_dec(PL_utf8_alnum);
1093 SvREFCNT_dec(PL_utf8_alnumc);
1094 SvREFCNT_dec(PL_utf8_ascii);
1095 SvREFCNT_dec(PL_utf8_alpha);
1096 SvREFCNT_dec(PL_utf8_space);
1097 SvREFCNT_dec(PL_utf8_cntrl);
1098 SvREFCNT_dec(PL_utf8_graph);
1099 SvREFCNT_dec(PL_utf8_digit);
1100 SvREFCNT_dec(PL_utf8_upper);
1101 SvREFCNT_dec(PL_utf8_lower);
1102 SvREFCNT_dec(PL_utf8_print);
1103 SvREFCNT_dec(PL_utf8_punct);
1104 SvREFCNT_dec(PL_utf8_xdigit);
1105 SvREFCNT_dec(PL_utf8_mark);
1106 SvREFCNT_dec(PL_utf8_toupper);
1107 SvREFCNT_dec(PL_utf8_totitle);
1108 SvREFCNT_dec(PL_utf8_tolower);
1109 SvREFCNT_dec(PL_utf8_tofold);
1110 SvREFCNT_dec(PL_utf8_idstart);
1111 SvREFCNT_dec(PL_utf8_idcont);
1112 PL_utf8_alnum = NULL;
1113 PL_utf8_alnumc = NULL;
1114 PL_utf8_ascii = NULL;
1115 PL_utf8_alpha = NULL;
1116 PL_utf8_space = NULL;
1117 PL_utf8_cntrl = NULL;
1118 PL_utf8_graph = NULL;
1119 PL_utf8_digit = NULL;
1120 PL_utf8_upper = NULL;
1121 PL_utf8_lower = NULL;
1122 PL_utf8_print = NULL;
1123 PL_utf8_punct = NULL;
1124 PL_utf8_xdigit = NULL;
1125 PL_utf8_mark = NULL;
1126 PL_utf8_toupper = NULL;
1127 PL_utf8_totitle = NULL;
1128 PL_utf8_tolower = NULL;
1129 PL_utf8_tofold = NULL;
1130 PL_utf8_idstart = NULL;
1131 PL_utf8_idcont = NULL;
1133 if (!specialWARN(PL_compiling.cop_warnings))
1134 SvREFCNT_dec(PL_compiling.cop_warnings);
1135 PL_compiling.cop_warnings = NULL;
1136 if (!specialCopIO(PL_compiling.cop_io))
1137 SvREFCNT_dec(PL_compiling.cop_io);
1138 PL_compiling.cop_io = NULL;
1139 CopFILE_free(&PL_compiling);
1140 CopSTASH_free(&PL_compiling);
1142 /* Prepare to destruct main symbol table. */
1147 SvREFCNT_dec(PL_curstname);
1148 PL_curstname = NULL;
1150 /* clear queued errors */
1151 SvREFCNT_dec(PL_errors);
1155 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1156 if (PL_scopestack_ix != 0)
1157 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1158 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1159 (long)PL_scopestack_ix);
1160 if (PL_savestack_ix != 0)
1161 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1162 "Unbalanced saves: %ld more saves than restores\n",
1163 (long)PL_savestack_ix);
1164 if (PL_tmps_floor != -1)
1165 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1166 (long)PL_tmps_floor + 1);
1167 if (cxstack_ix != -1)
1168 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1169 (long)cxstack_ix + 1);
1172 /* Now absolutely destruct everything, somehow or other, loops or no. */
1173 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1174 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1176 /* the 2 is for PL_fdpid and PL_strtab */
1177 while (PL_sv_count > 2 && sv_clean_all())
1180 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1181 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1182 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1183 SvFLAGS(PL_strtab) |= SVt_PVHV;
1185 AvREAL_off(PL_fdpid); /* no surviving entries */
1186 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1189 #ifdef HAVE_INTERP_INTERN
1193 /* Destruct the global string table. */
1195 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1196 * so that sv_free() won't fail on them.
1199 const I32 max = HvMAX(PL_strtab);
1200 HE * const * const array = HvARRAY(PL_strtab);
1201 HE *hent = array[0];
1204 if (hent && ckWARN_d(WARN_INTERNAL)) {
1205 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1206 "Unbalanced string table refcount: (%ld) for \"%s\"",
1207 (long)(HeVAL(hent) - Nullsv), HeKEY(hent));
1208 HeVAL(hent) = Nullsv;
1209 hent = HeNEXT(hent);
1214 hent = array[riter];
1218 SvREFCNT_dec(PL_strtab);
1221 /* free the pointer table used for cloning */
1222 ptr_table_free(PL_ptr_table);
1223 PL_ptr_table = (PTR_TBL_t*)NULL;
1226 /* free special SVs */
1228 SvREFCNT(&PL_sv_yes) = 0;
1229 sv_clear(&PL_sv_yes);
1230 SvANY(&PL_sv_yes) = NULL;
1231 SvFLAGS(&PL_sv_yes) = 0;
1233 SvREFCNT(&PL_sv_no) = 0;
1234 sv_clear(&PL_sv_no);
1235 SvANY(&PL_sv_no) = NULL;
1236 SvFLAGS(&PL_sv_no) = 0;
1240 for (i=0; i<=2; i++) {
1241 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1242 sv_clear(PERL_DEBUG_PAD(i));
1243 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1244 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1248 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1249 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1251 #ifdef DEBUG_LEAKING_SCALARS
1252 if (PL_sv_count != 0) {
1257 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1258 svend = &sva[SvREFCNT(sva)];
1259 for (sv = sva + 1; sv < svend; ++sv) {
1260 if (SvTYPE(sv) != SVTYPEMASK) {
1261 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1263 " refcnt=%"UVuf pTHX__FORMAT "\n",
1264 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE);
1265 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1266 Perl_dump_sv_child(aTHX_ sv);
1272 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1276 /* Wait for up to 4 seconds for child to terminate.
1277 This seems to be the least effort way of timing out on reaping
1279 struct timeval waitfor = {4, 0};
1280 int sock = PL_dumper_fd;
1284 FD_SET(sock, &rset);
1285 select(sock + 1, &rset, NULL, NULL, &waitfor);
1286 waitpid(child, &status, WNOHANG);
1294 #if defined(PERLIO_LAYERS)
1295 /* No more IO - including error messages ! */
1296 PerlIO_cleanup(aTHX);
1299 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1300 as currently layers use it rather than NULL as a marker
1301 for no arg - and will try and SvREFCNT_dec it.
1303 SvREFCNT(&PL_sv_undef) = 0;
1304 SvREADONLY_off(&PL_sv_undef);
1306 Safefree(PL_origfilename);
1307 PL_origfilename = NULL;
1308 Safefree(PL_reg_start_tmp);
1309 PL_reg_start_tmp = (char**)NULL;
1310 PL_reg_start_tmpl = 0;
1311 Safefree(PL_reg_curpm);
1312 Safefree(PL_reg_poscache);
1313 free_tied_hv_pool();
1314 Safefree(PL_op_mask);
1315 Safefree(PL_psig_ptr);
1316 PL_psig_ptr = (SV**)NULL;
1317 Safefree(PL_psig_name);
1318 PL_psig_name = (SV**)NULL;
1319 Safefree(PL_bitcount);
1321 Safefree(PL_psig_pend);
1322 PL_psig_pend = (int*)NULL;
1327 PL_tainting = FALSE;
1328 PL_taint_warn = FALSE;
1329 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1332 DEBUG_P(debprofdump());
1333 #ifdef USE_5005THREADS
1334 MUTEX_DESTROY(&PL_strtab_mutex);
1335 MUTEX_DESTROY(&PL_sv_mutex);
1336 MUTEX_DESTROY(&PL_eval_mutex);
1337 MUTEX_DESTROY(&PL_cred_mutex);
1338 MUTEX_DESTROY(&PL_fdpid_mutex);
1339 COND_DESTROY(&PL_eval_cond);
1340 #ifdef EMULATE_ATOMIC_REFCOUNTS
1341 MUTEX_DESTROY(&PL_svref_mutex);
1342 #endif /* EMULATE_ATOMIC_REFCOUNTS */
1344 /* As the penultimate thing, free the non-arena SV for thrsv */
1345 Safefree(SvPVX(PL_thrsv));
1346 Safefree(SvANY(PL_thrsv));
1349 #endif /* USE_5005THREADS */
1351 #ifdef USE_REENTRANT_API
1352 Perl_reentrant_free(aTHX);
1357 /* As the absolutely last thing, free the non-arena SV for mess() */
1360 /* we know that type == SVt_PVMG */
1362 /* it could have accumulated taint magic */
1365 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1366 moremagic = mg->mg_moremagic;
1367 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1369 Safefree(mg->mg_ptr);
1373 /* we know that type >= SVt_PV */
1374 SvPV_free(PL_mess_sv);
1375 Safefree(SvANY(PL_mess_sv));
1376 Safefree(PL_mess_sv);
1383 =for apidoc perl_free
1385 Releases a Perl interpreter. See L<perlembed>.
1393 #ifdef PERL_TRACK_MEMPOOL
1396 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1397 * value as we're probably hunting memory leaks then
1399 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1400 if (!s || atoi(s) == 0) {
1401 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1402 thread at thread exit. */
1403 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1404 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1409 #if defined(WIN32) || defined(NETWARE)
1410 # if defined(PERL_IMPLICIT_SYS)
1413 void *host = nw_internal_host;
1415 void *host = w32_internal_host;
1417 PerlMem_free(aTHXx);
1419 nw_delete_internal_host(host);
1421 win32_delete_internal_host(host);
1425 PerlMem_free(aTHXx);
1428 PerlMem_free(aTHXx);
1432 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1433 /* provide destructors to clean up the thread key when libperl is unloaded */
1434 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1436 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1437 #pragma fini "perl_fini"
1438 #elif defined(__sun) && !defined(__GNUC__)
1439 #pragma fini (perl_fini)
1443 #if defined(__GNUC__)
1444 __attribute__((destructor))
1453 #endif /* THREADS */
1456 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1458 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1459 PL_exitlist[PL_exitlistlen].fn = fn;
1460 PL_exitlist[PL_exitlistlen].ptr = ptr;
1464 #ifdef HAS_PROCSELFEXE
1465 /* This is a function so that we don't hold on to MAXPATHLEN
1466 bytes of stack longer than necessary
1469 S_procself_val(pTHX_ SV *sv, char *arg0)
1471 char buf[MAXPATHLEN];
1472 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1474 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1475 includes a spurious NUL which will cause $^X to fail in system
1476 or backticks (this will prevent extensions from being built and
1477 many tests from working). readlink is not meant to add a NUL.
1478 Normal readlink works fine.
1480 if (len > 0 && buf[len-1] == '\0') {
1484 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1485 returning the text "unknown" from the readlink rather than the path
1486 to the executable (or returning an error from the readlink). Any valid
1487 path has a '/' in it somewhere, so use that to validate the result.
1488 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1490 if (len > 0 && memchr(buf, '/', len)) {
1491 sv_setpvn(sv,buf,len);
1497 #endif /* HAS_PROCSELFEXE */
1500 S_set_caret_X(pTHX) {
1501 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1503 #ifdef HAS_PROCSELFEXE
1504 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1507 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
1509 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
1516 =for apidoc perl_parse
1518 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1524 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1529 #ifdef USE_5005THREADS
1533 PERL_UNUSED_ARG(my_perl);
1535 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1538 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1539 setuid perl scripts securely.\n");
1540 #endif /* IAMSUID */
1543 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1544 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1545 * This MUST be done before any hash stores or fetches take place.
1546 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1547 * yourself, it is your responsibility to provide a good random seed!
1548 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1549 if (!PL_rehash_seed_set)
1550 PL_rehash_seed = get_hash_seed();
1552 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1554 if (s && (atoi(s) == 1))
1555 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1557 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1562 if (PL_origalen != 0) {
1563 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1566 /* Set PL_origalen be the sum of the contiguous argv[]
1567 * elements plus the size of the env in case that it is
1568 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1569 * as the maximum modifiable length of $0. In the worst case
1570 * the area we are able to modify is limited to the size of
1571 * the original argv[0]. (See below for 'contiguous', though.)
1573 const char *s = NULL;
1576 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1577 /* Do the mask check only if the args seem like aligned. */
1579 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1581 /* See if all the arguments are contiguous in memory. Note
1582 * that 'contiguous' is a loose term because some platforms
1583 * align the argv[] and the envp[]. If the arguments look
1584 * like non-aligned, assume that they are 'strictly' or
1585 * 'traditionally' contiguous. If the arguments look like
1586 * aligned, we just check that they are within aligned
1587 * PTRSIZE bytes. As long as no system has something bizarre
1588 * like the argv[] interleaved with some other data, we are
1589 * fine. (Did I just evoke Murphy's Law?) --jhi */
1590 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1592 for (i = 1; i < PL_origargc; i++) {
1593 if ((PL_origargv[i] == s + 1
1595 || PL_origargv[i] == s + 2
1600 (PL_origargv[i] > s &&
1602 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1612 /* Can we grab env area too to be used as the area for $0? */
1613 if (s && PL_origenviron) {
1614 if ((PL_origenviron[0] == s + 1
1616 || (PL_origenviron[0] == s + 9 && (s += 8))
1621 (PL_origenviron[0] > s &&
1622 PL_origenviron[0] <=
1623 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1627 s = PL_origenviron[0];
1630 my_setenv("NoNe SuCh", NULL);
1631 /* Force copy of environment. */
1632 for (i = 1; PL_origenviron[i]; i++) {
1633 if (PL_origenviron[i] == s + 1
1636 (PL_origenviron[i] > s &&
1637 PL_origenviron[i] <=
1638 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1641 s = PL_origenviron[i];
1649 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1654 /* Come here if running an undumped a.out. */
1656 PL_origfilename = savepv(argv[0]);
1657 PL_do_undump = FALSE;
1658 cxstack_ix = -1; /* start label stack again */
1660 assert (!PL_tainted);
1662 S_set_caret_X(aTHX);
1664 init_postdump_symbols(argc,argv,env);
1669 op_free(PL_main_root);
1670 PL_main_root = NULL;
1672 PL_main_start = NULL;
1673 SvREFCNT_dec(PL_main_cv);
1674 PL_main_cv = Nullcv;
1677 oldscope = PL_scopestack_ix;
1678 PL_dowarn = G_WARN_OFF;
1680 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1681 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
1687 #ifndef PERL_FLEXIBLE_EXCEPTIONS
1688 parse_body(env,xsinit);
1691 call_list(oldscope, PL_checkav);
1698 /* my_exit() was called */
1699 while (PL_scopestack_ix > oldscope)
1702 PL_curstash = PL_defstash;
1704 call_list(oldscope, PL_checkav);
1708 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1716 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1718 S_vparse_body(pTHX_ va_list args)
1720 char **env = va_arg(args, char**);
1721 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1723 return parse_body(env, xsinit);
1728 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1730 int argc = PL_origargc;
1731 char **argv = PL_origargv;
1732 const char *scriptname = NULL;
1733 VOL bool dosearch = FALSE;
1734 const char *validarg = "";
1737 const char *cddir = NULL;
1738 #ifdef USE_SITECUSTOMIZE
1739 bool minus_f = FALSE;
1742 sv_setpvn(PL_linestr,"",0);
1743 sv = newSVpvs(""); /* first used for -I flags */
1747 for (argc--,argv++; argc > 0; argc--,argv++) {
1748 if (argv[0][0] != '-' || !argv[0][1])
1752 validarg = " PHOOEY ";
1756 * Can we rely on the kernel to start scripts with argv[1] set to
1757 * contain all #! line switches (the whole line)? (argv[0] is set to
1758 * the interpreter name, argv[2] to the script name; argv[3] and
1759 * above may contain other arguments.)
1766 #ifndef PERL_STRICT_CR
1790 if ((s = moreswitches(s)))
1795 CHECK_MALLOC_TOO_LATE_FOR('t');
1796 if( !PL_tainting ) {
1797 PL_taint_warn = TRUE;
1803 CHECK_MALLOC_TOO_LATE_FOR('T');
1805 PL_taint_warn = FALSE;
1810 #ifdef MACOS_TRADITIONAL
1811 /* ignore -e for Dev:Pseudo argument */
1812 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1815 forbid_setid('e', -1);
1817 PL_e_script = newSVpvs("");
1818 filter_add(read_e_script, NULL);
1821 sv_catpv(PL_e_script, s);
1823 sv_catpv(PL_e_script, argv[1]);
1827 Perl_croak(aTHX_ "No code specified for -e");
1828 sv_catpvs(PL_e_script, "\n");
1832 #ifdef USE_SITECUSTOMIZE
1838 case 'I': /* -I handled both here and in moreswitches() */
1839 forbid_setid('I', -1);
1840 if (!*++s && (s=argv[1]) != NULL) {
1844 STRLEN len = strlen(s);
1845 const char * const p = savepvn(s, len);
1846 incpush(p, TRUE, TRUE, FALSE, FALSE);
1847 sv_catpvs(sv, "-I");
1848 sv_catpvn(sv, p, len);
1853 Perl_croak(aTHX_ "No directory specified for -I");
1856 forbid_setid('P', -1);
1857 PL_preprocess = TRUE;
1861 forbid_setid('S', -1);
1870 PL_preambleav = newAV();
1871 av_push(PL_preambleav,
1872 newSVpvs("use Config;"));
1876 opts_prog = newSVpvs("print Config::myconfig(),");
1878 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1880 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1882 opts = SvCUR(opts_prog);
1884 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1888 # ifdef DEBUG_LEAKING_SCALARS
1889 " DEBUG_LEAKING_SCALARS"
1891 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1892 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1894 # ifdef FAKE_THREADS
1897 # ifdef MULTIPLICITY
1906 # ifdef PERL_DONT_CREATE_GVSV
1907 " PERL_DONT_CREATE_GVSV"
1909 # ifdef PERL_GLOBAL_STRUCT
1910 " PERL_GLOBAL_STRUCT"
1912 # ifdef PERL_IMPLICIT_CONTEXT
1913 " PERL_IMPLICIT_CONTEXT"
1915 # ifdef PERL_IMPLICIT_SYS
1916 " PERL_IMPLICIT_SYS"
1921 # ifdef PERL_MALLOC_WRAP
1924 # ifdef PERL_NEED_APPCTX
1927 # ifdef PERL_NEED_TIMESBASE
1928 " PERL_NEED_TIMESBASE"
1930 # ifdef PERL_OLD_COPY_ON_WRITE
1931 " PERL_OLD_COPY_ON_WRITE"
1933 # ifdef PERL_TRACK_MEMPOOL
1934 " PERL_TRACK_MEMPOOL"
1936 # ifdef PERL_USE_SAFE_PUTENV
1937 " PERL_USE_SAFE_PUTENV"
1939 # ifdef PL_OP_SLAB_ALLOC
1942 # ifdef THREADS_HAVE_PIDS
1943 " THREADS_HAVE_PIDS"
1945 # ifdef USE_5005THREADS
1948 # ifdef USE_64_BIT_ALL
1951 # ifdef USE_64_BIT_INT
1954 # ifdef USE_ITHREADS
1957 # ifdef USE_LARGE_FILES
1960 # ifdef USE_LONG_DOUBLE
1966 # ifdef USE_REENTRANT_API
1967 " USE_REENTRANT_API"
1972 # ifdef USE_SITECUSTOMIZE
1973 " USE_SITECUSTOMIZE"
1980 while (SvCUR(opts_prog) > opts+76) {
1981 /* find last space after "options: " and before col 76
1985 char * const pv = SvPV_nolen(opts_prog);
1986 const char c = pv[opts+76];
1988 space = strrchr(pv+opts+26, ' ');
1990 if (!space) break; /* "Can't happen" */
1992 /* break the line before that space */
1995 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1996 STR_WITH_LEN("\\n "));
1999 sv_catpvs(opts_prog,"\\n\",");
2001 #if defined(LOCAL_PATCH_COUNT)
2002 if (LOCAL_PATCH_COUNT > 0) {
2004 sv_catpvs(opts_prog,
2005 "\" Locally applied patches:\\n\",");
2006 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
2007 if (PL_localpatches[i])
2008 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
2009 0, PL_localpatches[i], 0);
2013 Perl_sv_catpvf(aTHX_ opts_prog,
2014 "\" Built under %s\\n\"",OSNAME);
2017 Perl_sv_catpvf(aTHX_ opts_prog,
2018 ",\" Compiled at %s %s\\n\"",__DATE__,
2021 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
2025 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
2026 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
2027 "sort grep {/^PERL/} keys %ENV; ");
2029 sv_catpvs(opts_prog,
2030 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
2032 sv_catpvs(opts_prog,
2033 "print \" \\%ENV:\\n @env\\n\" if @env;"
2034 "print \" \\@INC:\\n @INC\\n\";");
2038 opts_prog = Perl_newSVpvf(aTHX_
2039 "Config::config_vars(qw%c%s%c)",
2043 av_push(PL_preambleav, opts_prog);
2044 /* don't look for script or read stdin */
2045 scriptname = BIT_BUCKET;
2049 PL_doextract = TRUE;
2057 if (!*++s || isSPACE(*s)) {
2061 /* catch use of gnu style long options */
2062 if (strEQ(s, "version")) {
2066 if (strEQ(s, "help")) {
2073 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2079 #ifndef SECURE_INTERNAL_GETENV
2082 (s = PerlEnv_getenv("PERL5OPT")))
2084 const char *popt = s;
2087 if (*s == '-' && *(s+1) == 'T') {
2088 CHECK_MALLOC_TOO_LATE_FOR('T');
2090 PL_taint_warn = FALSE;
2093 char *popt_copy = NULL;
2106 if (!strchr("CDIMUdmtw", *s))
2107 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2111 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2112 s = popt_copy + (s - popt);
2113 d = popt_copy + (d - popt);
2120 if( !PL_tainting ) {
2121 PL_taint_warn = TRUE;
2131 #ifdef USE_SITECUSTOMIZE
2134 PL_preambleav = newAV();
2135 av_unshift(PL_preambleav, 1);
2136 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2140 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
2141 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
2145 scriptname = argv[0];
2148 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2150 else if (scriptname == NULL) {
2152 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2158 /* Set $^X early so that it can be used for relocatable paths in @INC */
2159 assert (!PL_tainted);
2161 S_set_caret_X(aTHX);
2168 = open_script(scriptname, dosearch, sv, &suidscript);
2170 validate_suid(validarg, scriptname, fdscript, suidscript);
2173 # if defined(SIGCHLD) || defined(SIGCLD)
2176 # define SIGCHLD SIGCLD
2178 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2179 if (sigstate == (Sighandler_t) SIG_IGN) {
2180 if (ckWARN(WARN_SIGNAL))
2181 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2182 "Can't ignore signal CHLD, forcing to default");
2183 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2190 #ifdef MACOS_TRADITIONAL
2191 || gMacPerl_AlwaysExtract
2195 /* This will croak if suidscript is >= 0, as -x cannot be used with
2197 forbid_setid('x', suidscript);
2198 /* Hence you can't get here if suidscript >= 0 */
2201 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2202 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2206 PL_main_cv = PL_compcv = (CV*)newSV(0);
2207 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2208 CvUNIQUE_on(PL_compcv);
2210 CvPADLIST(PL_compcv) = pad_new(0);
2211 #ifdef USE_5005THREADS
2212 CvOWNER(PL_compcv) = 0;
2213 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
2214 MUTEX_INIT(CvMUTEXP(PL_compcv));
2215 #endif /* USE_5005THREADS */
2218 boot_core_UNIVERSAL();
2219 boot_core_xsutils();
2222 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2224 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2230 # ifdef HAS_SOCKS5_INIT
2231 socks5_init(argv[0]);
2237 init_predump_symbols();
2238 /* init_postdump_symbols not currently designed to be called */
2239 /* more than once (ENV isn't cleared first, for example) */
2240 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2242 init_postdump_symbols(argc,argv,env);
2244 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2245 * or explicitly in some platforms.
2246 * locale.c:Perl_init_i18nl10n() if the environment
2247 * look like the user wants to use UTF-8. */
2248 #if defined(SYMBIAN)
2249 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2252 /* Requires init_predump_symbols(). */
2253 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2258 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2259 * and the default open disciplines. */
2260 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2261 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2263 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2264 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2265 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2267 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2268 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2269 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2271 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2272 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2273 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2275 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2276 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2279 sv_setpvn(sv, ":utf8\0:utf8", 11);
2281 sv_setpvn(sv, ":utf8\0", 6);
2284 sv_setpvn(sv, "\0:utf8", 6);
2290 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2291 if (strEQ(s, "unsafe"))
2292 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2293 else if (strEQ(s, "safe"))
2294 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2296 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2301 /* now parse the script */
2303 SETERRNO(0,SS_NORMAL);
2305 #ifdef MACOS_TRADITIONAL
2306 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2308 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2310 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2311 MacPerl_MPWFileName(PL_origfilename));
2315 if (yyparse() || PL_error_count) {
2317 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2319 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2324 CopLINE_set(PL_curcop, 0);
2325 PL_curstash = PL_defstash;
2326 PL_preprocess = FALSE;
2328 SvREFCNT_dec(PL_e_script);
2336 SAVECOPFILE(PL_curcop);
2337 SAVECOPLINE(PL_curcop);
2338 gv_check(PL_defstash);
2345 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2346 dump_mstats("after compilation:");
2355 =for apidoc perl_run
2357 Tells a Perl interpreter to run. See L<perlembed>.
2368 #ifdef USE_5005THREADS
2372 PERL_UNUSED_ARG(my_perl);
2374 oldscope = PL_scopestack_ix;
2379 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2381 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
2387 cxstack_ix = -1; /* start context stack again */
2389 case 0: /* normal completion */
2390 #ifndef PERL_FLEXIBLE_EXCEPTIONS
2395 case 2: /* my_exit() */
2396 while (PL_scopestack_ix > oldscope)
2399 PL_curstash = PL_defstash;
2400 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2401 PL_endav && !PL_minus_c)
2402 call_list(oldscope, PL_endav);
2404 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2405 dump_mstats("after execution: ");
2411 POPSTACK_TO(PL_mainstack);
2414 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2424 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2426 S_vrun_body(pTHX_ va_list args)
2428 I32 oldscope = va_arg(args, I32);
2437 S_run_body(pTHX_ I32 oldscope)
2439 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2440 PL_sawampersand ? "Enabling" : "Omitting"));
2442 if (!PL_restartop) {
2443 DEBUG_x(dump_all());
2446 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2448 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2452 #ifdef MACOS_TRADITIONAL
2453 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2454 (gMacPerl_ErrorFormat ? "# " : ""),
2455 MacPerl_MPWFileName(PL_origfilename));
2457 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2461 if (PERLDB_SINGLE && PL_DBsingle)
2462 sv_setiv(PL_DBsingle, 1);
2464 call_list(oldscope, PL_initav);
2470 PL_op = PL_restartop;
2474 else if (PL_main_start) {
2475 CvDEPTH(PL_main_cv) = 1;
2476 PL_op = PL_main_start;
2484 =head1 SV Manipulation Functions
2486 =for apidoc p||get_sv
2488 Returns the SV of the specified Perl scalar. If C<create> is set and the
2489 Perl variable does not exist then it will be created. If C<create> is not
2490 set and the variable does not exist then NULL is returned.
2496 Perl_get_sv(pTHX_ const char *name, I32 create)
2499 #ifdef USE_5005THREADS
2500 if (name[1] == '\0' && !isALPHA(name[0])) {
2501 PADOFFSET tmp = find_threadsv(name);
2502 if (tmp != NOT_IN_PAD)
2503 return THREADSV(tmp);
2505 #endif /* USE_5005THREADS */
2506 gv = gv_fetchpv(name, create, SVt_PV);
2513 =head1 Array Manipulation Functions
2515 =for apidoc p||get_av
2517 Returns the AV of the specified Perl array. If C<create> is set and the
2518 Perl variable does not exist then it will be created. If C<create> is not
2519 set and the variable does not exist then NULL is returned.
2525 Perl_get_av(pTHX_ const char *name, I32 create)
2527 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2536 =head1 Hash Manipulation Functions
2538 =for apidoc p||get_hv
2540 Returns the HV of the specified Perl hash. If C<create> is set and the
2541 Perl variable does not exist then it will be created. If C<create> is not
2542 set and the variable does not exist then NULL is returned.
2548 Perl_get_hv(pTHX_ const char *name, I32 create)
2550 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2559 =head1 CV Manipulation Functions
2561 =for apidoc p||get_cv
2563 Returns the CV of the specified Perl subroutine. If C<create> is set and
2564 the Perl subroutine does not exist then it will be declared (which has the
2565 same effect as saying C<sub name;>). If C<create> is not set and the
2566 subroutine does not exist then NULL is returned.
2572 Perl_get_cv(pTHX_ const char *name, I32 create)
2574 GV* const gv = gv_fetchpv(name, create, SVt_PVCV);
2575 /* XXX unsafe for 5005 threads if eval_owner isn't held */
2576 /* XXX this is probably not what they think they're getting.
2577 * It has the same effect as "sub name;", i.e. just a forward
2579 if (create && !GvCVu(gv))
2580 return newSUB(start_subparse(FALSE, 0),
2581 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2588 /* Be sure to refetch the stack pointer after calling these routines. */
2592 =head1 Callback Functions
2594 =for apidoc p||call_argv
2596 Performs a callback to the specified Perl sub. See L<perlcall>.
2602 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2604 /* See G_* flags in cop.h */
2605 /* null terminated arg list */
2612 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2617 return call_pv(sub_name, flags);
2621 =for apidoc p||call_pv
2623 Performs a callback to the specified Perl sub. See L<perlcall>.
2629 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2630 /* name of the subroutine */
2631 /* See G_* flags in cop.h */
2633 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2637 =for apidoc p||call_method
2639 Performs a callback to the specified Perl method. The blessed object must
2640 be on the stack. See L<perlcall>.
2646 Perl_call_method(pTHX_ const char *methname, I32 flags)
2647 /* name of the subroutine */
2648 /* See G_* flags in cop.h */
2650 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2653 /* May be called with any of a CV, a GV, or an SV containing the name. */
2655 =for apidoc p||call_sv
2657 Performs a callback to the Perl sub whose name is in the SV. See
2664 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2665 /* See G_* flags in cop.h */
2668 LOGOP myop; /* fake syntax tree node */
2673 bool oldcatch = CATCH_GET;
2675 OP* const oldop = PL_op;
2678 if (flags & G_DISCARD) {
2683 Zero(&myop, 1, LOGOP);
2684 myop.op_next = NULL;
2685 if (!(flags & G_NOARGS))
2686 myop.op_flags |= OPf_STACKED;
2687 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2688 (flags & G_ARRAY) ? OPf_WANT_LIST :
2693 EXTEND(PL_stack_sp, 1);
2694 *++PL_stack_sp = sv;
2696 oldscope = PL_scopestack_ix;
2698 if (PERLDB_SUB && PL_curstash != PL_debstash
2699 /* Handle first BEGIN of -d. */
2700 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2701 /* Try harder, since this may have been a sighandler, thus
2702 * curstash may be meaningless. */
2703 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2704 && !(flags & G_NODEBUG))
2705 PL_op->op_private |= OPpENTERSUB_DB;
2707 if (flags & G_METHOD) {
2708 Zero(&method_op, 1, UNOP);
2709 method_op.op_next = PL_op;
2710 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2711 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2712 PL_op = (OP*)&method_op;
2715 if (!(flags & G_EVAL)) {
2717 call_body((OP*)&myop, FALSE);
2718 retval = PL_stack_sp - (PL_stack_base + oldmark);
2719 CATCH_SET(oldcatch);
2722 myop.op_other = (OP*)&myop;
2725 create_eval_scope(flags|G_FAKINGEVAL);
2728 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2730 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
2738 #ifndef PERL_FLEXIBLE_EXCEPTIONS
2740 call_body((OP*)&myop, FALSE);
2742 retval = PL_stack_sp - (PL_stack_base + oldmark);
2743 if (!(flags & G_KEEPERR))
2744 sv_setpvn(ERRSV,"",0);
2750 /* my_exit() was called */
2751 PL_curstash = PL_defstash;
2754 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2755 Perl_croak(aTHX_ "Callback called exit");
2760 PL_op = PL_restartop;
2764 PL_stack_sp = PL_stack_base + oldmark;
2765 if (flags & G_ARRAY)
2769 *++PL_stack_sp = &PL_sv_undef;
2774 if (PL_scopestack_ix > oldscope) {
2775 delete_eval_scope();
2781 if (flags & G_DISCARD) {
2782 PL_stack_sp = PL_stack_base + oldmark;
2791 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2793 S_vcall_body(pTHX_ va_list args)
2795 OP *myop = va_arg(args, OP*);
2796 int is_eval = va_arg(args, int);
2798 call_body(myop, is_eval);
2804 S_call_body(pTHX_ const OP *myop, bool is_eval)
2806 if (PL_op == myop) {
2808 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2810 PL_op = Perl_pp_entersub(aTHX); /* this does */
2816 /* Eval a string. The G_EVAL flag is always assumed. */
2819 =for apidoc p||eval_sv
2821 Tells Perl to C<eval> the string in the SV.
2827 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2829 /* See G_* flags in cop.h */
2832 UNOP myop; /* fake syntax tree node */
2833 VOL I32 oldmark = SP - PL_stack_base;
2836 OP* const oldop = PL_op;
2839 if (flags & G_DISCARD) {
2846 Zero(PL_op, 1, UNOP);
2847 EXTEND(PL_stack_sp, 1);
2848 *++PL_stack_sp = sv;
2850 if (!(flags & G_NOARGS))
2851 myop.op_flags = OPf_STACKED;
2852 myop.op_next = NULL;
2853 myop.op_type = OP_ENTEREVAL;
2854 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2855 (flags & G_ARRAY) ? OPf_WANT_LIST :
2857 if (flags & G_KEEPERR)
2858 myop.op_flags |= OPf_SPECIAL;
2860 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2862 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
2865 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2866 * before a PUSHEVAL, which corrupts the stack after a croak */
2867 TAINT_PROPER("eval_sv()");
2873 #ifndef PERL_FLEXIBLE_EXCEPTIONS
2875 call_body((OP*)&myop,TRUE);
2877 retval = PL_stack_sp - (PL_stack_base + oldmark);
2878 if (!(flags & G_KEEPERR))
2879 sv_setpvn(ERRSV,"",0);
2885 /* my_exit() was called */
2886 PL_curstash = PL_defstash;
2889 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2890 Perl_croak(aTHX_ "Callback called exit");
2895 PL_op = PL_restartop;
2899 PL_stack_sp = PL_stack_base + oldmark;
2900 if (flags & G_ARRAY)
2904 *++PL_stack_sp = &PL_sv_undef;
2910 if (flags & G_DISCARD) {
2911 PL_stack_sp = PL_stack_base + oldmark;
2921 =for apidoc p||eval_pv
2923 Tells Perl to C<eval> the given string and return an SV* result.
2929 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2932 SV* sv = newSVpv(p, 0);
2934 eval_sv(sv, G_SCALAR);
2941 if (croak_on_error && SvTRUE(ERRSV)) {
2942 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2948 /* Require a module. */
2951 =head1 Embedding Functions
2953 =for apidoc p||require_pv
2955 Tells Perl to C<require> the file named by the string argument. It is
2956 analogous to the Perl code C<eval "require '$file'">. It's even
2957 implemented that way; consider using load_module instead.
2962 Perl_require_pv(pTHX_ const char *pv)
2966 PUSHSTACKi(PERLSI_REQUIRE);
2968 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2969 eval_sv(sv_2mortal(sv), G_DISCARD);
2975 Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
2977 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2980 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2984 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2986 /* This message really ought to be max 23 lines.
2987 * Removed -h because the user already knows that option. Others? */
2989 static const char * const usage_msg[] = {
2990 "-0[octal] specify record separator (\\0, if no argument)",
2991 "-a autosplit mode with -n or -p (splits $_ into @F)",
2992 "-C[number/list] enables the listed Unicode features",
2993 "-c check syntax only (runs BEGIN and CHECK blocks)",
2994 "-d[:debugger] run program under debugger",
2995 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2996 "-e program one line of program (several -e's allowed, omit programfile)",
2997 "-f don't do $sitelib/sitecustomize.pl at startup",
2998 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2999 "-i[extension] edit <> files in place (makes backup if extension supplied)",
3000 "-Idirectory specify @INC/#include directory (several -I's allowed)",
3001 "-l[octal] enable line ending processing, specifies line terminator",
3002 "-[mM][-]module execute \"use/no module...\" before executing program",
3003 "-n assume \"while (<>) { ... }\" loop around program",
3004 "-p assume loop like -n but print line also, like sed",
3005 "-P run program through C preprocessor before compilation",
3006 "-s enable rudimentary parsing for switches after programfile",
3007 "-S look for programfile using PATH environment variable",
3008 "-t enable tainting warnings",
3009 "-T enable tainting checks",
3010 "-u dump core after parsing program",
3011 "-U allow unsafe operations",
3012 "-v print version, subversion (includes VERY IMPORTANT perl info)",
3013 "-V[:variable] print configuration summary (or a single Config.pm variable)",
3014 "-w enable many useful warnings (RECOMMENDED)",
3015 "-W enable all warnings",
3016 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
3017 "-X disable all warnings",
3021 const char * const *p = usage_msg;
3023 PerlIO_printf(PerlIO_stdout(),
3024 "\nUsage: %s [switches] [--] [programfile] [arguments]",
3027 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
3030 /* convert a string of -D options (or digits) into an int.
3031 * sets *s to point to the char after the options */
3035 Perl_get_debug_opts(pTHX_ char **s)
3037 return get_debug_opts_flags(s, 1);
3041 Perl_get_debug_opts_flags(pTHX_ char **s, int flags)
3043 static const char * const usage_msgd[] = {
3044 " Debugging flag values: (see also -d)",
3045 " p Tokenizing and parsing (with v, displays parse stack)",
3046 " s Stack snapshots (with v, displays all stacks)",
3047 " l Context (loop) stack processing",
3048 " t Trace execution",
3049 " o Method and overloading resolution",
3050 " c String/numeric conversions",
3051 " P Print profiling info, preprocessor command for -P, source file input state",
3052 " m Memory allocation",
3053 " f Format processing",
3054 " r Regular expression parsing and execution",
3055 " x Syntax tree dump",
3056 " u Tainting checks",
3057 " H Hash dump -- usurps values()",
3058 " X Scratchpad allocation",
3060 " S Thread synchronization",
3062 " R Include reference counts of dumped variables (eg when using -Ds)",
3063 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
3064 " v Verbose: use in conjunction with other flags",
3066 " A Consistency checks on internal structures",
3067 " q quiet - currently only suppresses the 'EXECUTING' message",
3072 /* if adding extra options, remember to update DEBUG_MASK */
3073 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
3075 for (; isALNUM(**s); (*s)++) {
3076 const char * const d = strchr(debopts,**s);
3078 i |= 1 << (d - debopts);
3079 else if (ckWARN_d(WARN_DEBUGGING))
3080 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3081 "invalid option -D%c, use -D'' to see choices\n", **s);
3084 else if (isDIGIT(**s)) {
3086 for (; isALNUM(**s); (*s)++) ;
3088 else if (flags & 1) {
3090 const char *const *p = usage_msgd;
3091 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3094 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3095 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3096 "-Dp not implemented on this platform\n");
3102 /* This routine handles any switches that can be given during run */
3105 Perl_moreswitches(pTHX_ char *s)
3115 SvREFCNT_dec(PL_rs);
3116 if (s[1] == 'x' && s[2]) {
3117 const char *e = s+=2;
3123 flags = PERL_SCAN_SILENT_ILLDIGIT;
3124 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3125 if (s + numlen < e) {
3126 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3130 PL_rs = newSVpvs("");
3131 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3132 tmps = (U8*)SvPVX(PL_rs);
3133 uvchr_to_utf8(tmps, rschar);
3134 SvCUR_set(PL_rs, UNISKIP(rschar));
3139 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3140 if (rschar & ~((U8)~0))
3141 PL_rs = &PL_sv_undef;
3142 else if (!rschar && numlen >= 2)
3143 PL_rs = newSVpvs("");
3145 char ch = (char)rschar;
3146 PL_rs = newSVpvn(&ch, 1);
3149 sv_setsv(get_sv("/", TRUE), PL_rs);
3154 PL_unicode = parse_unicode_opts(&s);
3155 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3161 while (*s && !isSPACE(*s)) ++s;
3162 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3173 forbid_setid('d', -1);
3176 /* -dt indicates to the debugger that threads will be used */
3177 if (*s == 't' && !isALNUM(s[1])) {
3179 my_setenv("PERL5DB_THREADED", "1");
3182 /* The following permits -d:Mod to accepts arguments following an =
3183 in the fashion that -MSome::Mod does. */
3184 if (*s == ':' || *s == '=') {
3186 SV * const sv = newSVpvs("use Devel::");
3188 /* We now allow -d:Module=Foo,Bar */
3189 while(isALNUM(*s) || *s==':') ++s;
3191 sv_catpv(sv, start);
3193 sv_catpvn(sv, start, s-start);
3194 /* Don't use NUL as q// delimiter here, this string goes in the
3196 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3199 my_setenv("PERL5DB", (char *)SvPV_nolen_const(sv));
3202 PL_perldb = PERLDB_ALL;
3209 forbid_setid('D', -1);
3211 PL_debug = get_debug_opts_flags( &s, 1) | DEBUG_TOP_FLAG;
3212 #else /* !DEBUGGING */
3213 if (ckWARN_d(WARN_DEBUGGING))
3214 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3215 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3216 for (s++; isALNUM(*s); s++) ;
3221 usage(PL_origargv[0]);
3224 Safefree(PL_inplace);
3225 #if defined(__CYGWIN__) /* do backup extension automagically */
3226 if (*(s+1) == '\0') {
3227 PL_inplace = savepvs(".bak");
3230 #endif /* __CYGWIN__ */
3232 const char * const start = ++s;
3233 while (*s && !isSPACE(*s))
3236 PL_inplace = savepvn(start, s - start);
3240 if (*s == '-') /* Additional switches on #! line. */
3244 case 'I': /* -I handled both here and in parse_body() */
3245 forbid_setid('I', -1);
3247 while (*s && isSPACE(*s))
3252 /* ignore trailing spaces (possibly followed by other switches) */
3254 for (e = p; *e && !isSPACE(*e); e++) ;
3258 } while (*p && *p != '-');
3259 e = savepvn(s, e-s);
3260 incpush(e, TRUE, TRUE, FALSE, FALSE);
3267 Perl_croak(aTHX_ "No directory specified for -I");
3273 SvREFCNT_dec(PL_ors_sv);
3279 PL_ors_sv = newSVpvs("\n");
3280 numlen = 3 + (*s == '0');
3281 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3285 if (RsPARA(PL_rs)) {
3286 PL_ors_sv = newSVpvs("\n\n");
3289 PL_ors_sv = newSVsv(PL_rs);
3294 forbid_setid('M', -1); /* XXX ? */
3297 forbid_setid('m', -1); /* XXX ? */
3301 const char *use = "use ";
3302 /* -M-foo == 'no foo' */
3303 /* Leading space on " no " is deliberate, to make both
3304 possibilities the same length. */
3305 if (*s == '-') { use = " no "; ++s; }
3306 sv = newSVpvn(use,4);
3308 /* We allow -M'Module qw(Foo Bar)' */
3309 while(isALNUM(*s) || *s==':') ++s;
3311 sv_catpv(sv, start);
3312 if (*(start-1) == 'm') {
3314 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3315 sv_catpvs( sv, " ()");
3319 Perl_croak(aTHX_ "Module name required with -%c option",
3321 sv_catpvn(sv, start, s-start);
3322 sv_catpvs(sv, " split(/,/,q");
3323 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3325 sv_catpvs(sv, "\0)");
3329 PL_preambleav = newAV();
3330 av_push(PL_preambleav, sv);
3333 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3344 forbid_setid('s', -1);
3345 PL_doswitches = TRUE;
3359 #ifdef MACOS_TRADITIONAL
3360 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3362 PL_do_undump = TRUE;
3371 PerlIO_printf(PerlIO_stdout(),
3372 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
3373 PL_patchlevel, ARCHNAME));
3375 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3376 PerlIO_printf(PerlIO_stdout(),
3377 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
3378 PerlIO_printf(PerlIO_stdout(),
3379 Perl_form(aTHX_ " built under %s at %s %s\n",
3380 OSNAME, __DATE__, __TIME__));
3381 PerlIO_printf(PerlIO_stdout(),
3382 Perl_form(aTHX_ " OS Specific Release: %s\n",
3386 #if defined(LOCAL_PATCH_COUNT)
3387 if (LOCAL_PATCH_COUNT > 0)
3388 PerlIO_printf(PerlIO_stdout(),
3389 "\n(with %d registered patch%s, "
3390 "see perl -V for more detail)",
3392 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3395 PerlIO_printf(PerlIO_stdout(),
3396 "\n\nCopyright 1987-2006, Larry Wall\n");
3397 #ifdef MACOS_TRADITIONAL
3398 PerlIO_printf(PerlIO_stdout(),
3399 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3400 "maintained by Chris Nandor\n");
3403 PerlIO_printf(PerlIO_stdout(),
3404 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3407 PerlIO_printf(PerlIO_stdout(),
3408 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3409 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3412 PerlIO_printf(PerlIO_stdout(),
3413 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3414 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3417 PerlIO_printf(PerlIO_stdout(),
3418 "atariST series port, ++jrb bammi@cadence.com\n");
3421 PerlIO_printf(PerlIO_stdout(),
3422 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3425 PerlIO_printf(PerlIO_stdout(),
3426 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3429 PerlIO_printf(PerlIO_stdout(),
3430 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3433 PerlIO_printf(PerlIO_stdout(),
3434 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3437 PerlIO_printf(PerlIO_stdout(),
3438 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3441 PerlIO_printf(PerlIO_stdout(),
3442 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3445 PerlIO_printf(PerlIO_stdout(),
3446 "MiNT port by Guido Flohr, 1997-1999\n");
3449 PerlIO_printf(PerlIO_stdout(),
3450 "EPOC port by Olaf Flebbe, 1999-2002\n");
3453 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3454 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3457 #ifdef BINARY_BUILD_NOTICE
3458 BINARY_BUILD_NOTICE;
3460 PerlIO_printf(PerlIO_stdout(),
3462 Perl may be copied only under the terms of either the Artistic License or the\n\
3463 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3464 Complete documentation for Perl, including FAQ lists, should be found on\n\
3465 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3466 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3469 if (! (PL_dowarn & G_WARN_ALL_MASK))
3470 PL_dowarn |= G_WARN_ON;
3474 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3475 if (!specialWARN(PL_compiling.cop_warnings))
3476 SvREFCNT_dec(PL_compiling.cop_warnings);
3477 PL_compiling.cop_warnings = pWARN_ALL ;
3481 PL_dowarn = G_WARN_ALL_OFF;
3482 if (!specialWARN(PL_compiling.cop_warnings))
3483 SvREFCNT_dec(PL_compiling.cop_warnings);
3484 PL_compiling.cop_warnings = pWARN_NONE ;
3489 if (s[1] == '-') /* Additional switches on #! line. */
3494 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3500 #ifdef ALTERNATE_SHEBANG
3501 case 'S': /* OS/2 needs -S on "extproc" line. */
3509 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3514 /* compliments of Tom Christiansen */
3516 /* unexec() can be found in the Gnu emacs distribution */
3517 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3520 Perl_my_unexec(pTHX)
3523 SV * prog = newSVpv(BIN_EXP, 0);
3524 SV * file = newSVpv(PL_origfilename, 0);
3528 sv_catpvs(prog, "/perl");
3529 sv_catpvs(file, ".perldump");
3531 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3532 /* unexec prints msg to stderr in case of failure */
3533 PerlProc_exit(status);
3536 # include <lib$routines.h>
3537 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3538 # elif defined(WIN32) || defined(__CYGWIN__)
3539 Perl_croak(aTHX_ "dump is not supported");
3541 ABORT(); /* for use with undump */
3546 /* initialize curinterp */
3552 # define PERLVAR(var,type)
3553 # define PERLVARA(var,n,type)
3554 # if defined(PERL_IMPLICIT_CONTEXT)
3555 # if defined(USE_5005THREADS)
3556 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3557 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3558 # else /* !USE_5005THREADS */
3559 # define PERLVARI(var,type,init) aTHX->var = init;
3560 # define PERLVARIC(var,type,init) aTHX->var = init;
3561 # endif /* USE_5005THREADS */
3563 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3564 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3566 # include "intrpvar.h"
3567 # ifndef USE_5005THREADS
3568 # include "thrdvar.h"
3575 # define PERLVAR(var,type)
3576 # define PERLVARA(var,n,type)
3577 # define PERLVARI(var,type,init) PL_##var = init;
3578 # define PERLVARIC(var,type,init) PL_##var = init;
3579 # include "intrpvar.h"
3580 # ifndef USE_5005THREADS
3581 # include "thrdvar.h"
3592 S_init_main_stash(pTHX)
3596 PL_curstash = PL_defstash = newHV();
3597 /* We know that the string "main" will be in the global shared string
3598 table, so it's a small saving to use it rather than allocate another
3600 PL_curstname = newSVpvs_share("main");
3601 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3602 /* If we hadn't caused another reference to "main" to be in the shared
3603 string table above, then it would be worth reordering these two,
3604 because otherwise all we do is delete "main" from it as a consequence
3605 of the SvREFCNT_dec, only to add it again with hv_name_set */
3606 SvREFCNT_dec(GvHV(gv));
3607 hv_name_set(PL_defstash, "main", 4, 0);
3608 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3610 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3612 GvMULTI_on(PL_incgv);
3613 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3614 GvMULTI_on(PL_hintgv);
3615 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3616 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3617 GvMULTI_on(PL_errgv);
3618 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3619 GvMULTI_on(PL_replgv);
3620 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3621 #ifdef PERL_DONT_CREATE_GVSV
3624 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3625 sv_setpvn(ERRSV, "", 0);
3626 PL_curstash = PL_defstash;
3627 CopSTASH_set(&PL_compiling, PL_defstash);
3628 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3629 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3631 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
3632 /* We must init $/ before switches are processed. */
3633 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3637 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3643 const char *cpp_discard_flag;
3651 PL_origfilename = savepvs("-e");
3654 /* if find_script() returns, it returns a malloc()-ed value */
3655 scriptname = PL_origfilename = find_script((char *)scriptname, dosearch, NULL, 1);
3657 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3658 const char *s = scriptname + 8;
3664 * Tell apart "normal" usage of fdscript, e.g.
3665 * with bash on FreeBSD:
3666 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3667 * from usage in suidperl.
3668 * Does any "normal" usage leave garbage after the number???
3669 * Is it a mistake to use a similar /dev/fd/ construct for
3674 * Be supersafe and do some sanity-checks.
3675 * Still, can we be sure we got the right thing?
3678 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3681 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3683 scriptname = savepv(s + 1);
3684 Safefree(PL_origfilename);
3685 PL_origfilename = (char *)scriptname;
3690 CopFILE_free(PL_curcop);
3691 CopFILE_set(PL_curcop, PL_origfilename);
3692 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3693 scriptname = (char *)"";
3694 if (fdscript >= 0) {
3695 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3696 # if defined(HAS_FCNTL) && defined(F_SETFD)
3698 /* ensure close-on-exec */
3699 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3704 Perl_croak(aTHX_ "sperl needs fd script\n"
3705 "You should not call sperl directly; do you need to "
3706 "change a #! line\nfrom sperl to perl?\n");
3709 * Do not open (or do other fancy stuff) while setuid.
3710 * Perl does the open, and hands script to suidperl on a fd;
3711 * suidperl only does some checks, sets up UIDs and re-execs
3712 * perl with that fd as it has always done.
3715 if (*suidscript != 1) {
3716 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3719 else if (PL_preprocess) {
3720 const char * const cpp_cfg = CPPSTDIN;
3721 SV * const cpp = newSVpvs("");
3722 SV * const cmd = newSV(0);
3724 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3725 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3726 if (strEQ(cpp_cfg, "cppstdin"))
3727 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3728 sv_catpv(cpp, cpp_cfg);
3731 sv_catpvs(sv, "-I");
3732 sv_catpv(sv,PRIVLIB_EXP);
3735 DEBUG_P(PerlIO_printf(Perl_debug_log,
3736 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3737 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3740 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3747 cpp_discard_flag = "";
3749 cpp_discard_flag = "-C";
3753 perl = os2_execname(aTHX);
3755 perl = PL_origargv[0];
3759 /* This strips off Perl comments which might interfere with
3760 the C pre-processor, including #!. #line directives are
3761 deliberately stripped to avoid confusion with Perl's version
3762 of #line. FWP played some golf with it so it will fit
3763 into VMS's 255 character buffer.
3766 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3768 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3770 Perl_sv_setpvf(aTHX_ cmd, "\
3771 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3772 perl, quote, code, quote, scriptname, (void*)cpp,
3773 cpp_discard_flag, (void*)sv, CPPMINUS);
3775 PL_doextract = FALSE;
3777 DEBUG_P(PerlIO_printf(Perl_debug_log,
3778 "PL_preprocess: cmd=\"%s\"\n",
3781 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3785 else if (!*scriptname) {
3786 forbid_setid(0, *suidscript);
3787 PL_rsfp = PerlIO_stdin();
3790 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3791 # if defined(HAS_FCNTL) && defined(F_SETFD)
3793 /* ensure close-on-exec */
3794 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3797 #endif /* IAMSUID */
3799 /* PSz 16 Sep 03 Keep neat error message */
3801 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3803 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3804 CopFILE(PL_curcop), Strerror(errno));
3810 * I_SYSSTATVFS HAS_FSTATVFS
3812 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3813 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3814 * here so that metaconfig picks them up. */
3818 S_fd_on_nosuid_fs(pTHX_ int fd)
3821 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3822 * but is needed also on machines without setreuid.
3823 * Seems safe enough to run as root.
3825 int check_okay = 0; /* able to do all the required sys/libcalls */
3826 int on_nosuid = 0; /* the fd is on a nosuid fs */
3828 * Need to check noexec also: nosuid might not be set, the average
3829 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3831 int on_noexec = 0; /* the fd is on a noexec fs */
3834 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3835 * fstatvfs() is UNIX98.
3836 * fstatfs() is 4.3 BSD.
3837 * ustat()+getmnt() is pre-4.3 BSD.
3838 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3839 * an irrelevant filesystem while trying to reach the right one.
3842 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3844 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3845 defined(HAS_FSTATVFS)
3846 # define FD_ON_NOSUID_CHECK_OKAY
3847 struct statvfs stfs;
3849 check_okay = fstatvfs(fd, &stfs) == 0;
3850 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3852 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3853 on platforms where it is present. */
3854 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3856 # endif /* fstatvfs */
3858 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3859 defined(PERL_MOUNT_NOSUID) && \
3860 defined(PERL_MOUNT_NOEXEC) && \
3861 defined(HAS_FSTATFS) && \
3862 defined(HAS_STRUCT_STATFS) && \
3863 defined(HAS_STRUCT_STATFS_F_FLAGS)
3864 # define FD_ON_NOSUID_CHECK_OKAY
3867 check_okay = fstatfs(fd, &stfs) == 0;
3868 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3869 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3870 # endif /* fstatfs */
3872 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3873 defined(PERL_MOUNT_NOSUID) && \
3874 defined(PERL_MOUNT_NOEXEC) && \
3875 defined(HAS_FSTAT) && \
3876 defined(HAS_USTAT) && \
3877 defined(HAS_GETMNT) && \
3878 defined(HAS_STRUCT_FS_DATA) && \
3880 # define FD_ON_NOSUID_CHECK_OKAY
3883 if (fstat(fd, &fdst) == 0) {
3885 if (ustat(fdst.st_dev, &us) == 0) {
3887 /* NOSTAT_ONE here because we're not examining fields which
3888 * vary between that case and STAT_ONE. */
3889 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3890 size_t cmplen = sizeof(us.f_fname);
3891 if (sizeof(fsd.fd_req.path) < cmplen)
3892 cmplen = sizeof(fsd.fd_req.path);
3893 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3894 fdst.st_dev == fsd.fd_req.dev) {
3896 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3897 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3902 # endif /* fstat+ustat+getmnt */
3904 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3905 defined(HAS_GETMNTENT) && \
3906 defined(HAS_HASMNTOPT) && \
3907 defined(MNTOPT_NOSUID) && \
3908 defined(MNTOPT_NOEXEC)
3909 # define FD_ON_NOSUID_CHECK_OKAY
3910 FILE *mtab = fopen("/etc/mtab", "r");
3911 struct mntent *entry;
3914 if (mtab && (fstat(fd, &stb) == 0)) {
3915 while (entry = getmntent(mtab)) {
3916 if (stat(entry->mnt_dir, &fsb) == 0
3917 && fsb.st_dev == stb.st_dev)
3919 /* found the filesystem */
3921 if (hasmntopt(entry, MNTOPT_NOSUID))
3923 if (hasmntopt(entry, MNTOPT_NOEXEC))
3926 } /* A single fs may well fail its stat(). */
3931 # endif /* getmntent+hasmntopt */
3934 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3936 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3938 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3939 return ((!check_okay) || on_nosuid || on_noexec);
3941 #endif /* IAMSUID */
3944 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3945 int fdscript, int suidscript)
3949 #endif /* IAMSUID */
3951 /* do we need to emulate setuid on scripts? */
3953 /* This code is for those BSD systems that have setuid #! scripts disabled
3954 * in the kernel because of a security problem. Merely defining DOSUID
3955 * in perl will not fix that problem, but if you have disabled setuid
3956 * scripts in the kernel, this will attempt to emulate setuid and setgid
3957 * on scripts that have those now-otherwise-useless bits set. The setuid
3958 * root version must be called suidperl or sperlN.NNN. If regular perl
3959 * discovers that it has opened a setuid script, it calls suidperl with
3960 * the same argv that it had. If suidperl finds that the script it has
3961 * just opened is NOT setuid root, it sets the effective uid back to the
3962 * uid. We don't just make perl setuid root because that loses the
3963 * effective uid we had before invoking perl, if it was different from the
3966 * Description/comments above do not match current workings:
3967 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3968 * suidperl called with script open and name changed to /dev/fd/N/X;
3969 * suidperl croaks if script is not setuid;
3970 * making perl setuid would be a huge security risk (and yes, that
3971 * would lose any euid we might have had).
3973 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3974 * be defined in suidperl only. suidperl must be setuid root. The
3975 * Configure script will set this up for you if you want it.
3981 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3982 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3983 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3985 const char *linestr;
3989 if (fdscript < 0 || suidscript != 1)
3990 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3992 * Since the script is opened by perl, not suidperl, some of these
3993 * checks are superfluous. Leaving them in probably does not lower
3997 * Do checks even for systems with no HAS_SETREUID.
3998 * We used to swap, then re-swap UIDs with
4000 if (setreuid(PL_euid,PL_uid) < 0
4001 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
4002 Perl_croak(aTHX_ "Can't swap uid and euid");
4005 if (setreuid(PL_uid,PL_euid) < 0
4006 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
4007 Perl_croak(aTHX_ "Can't reswap uid and euid");
4011 /* On this access check to make sure the directories are readable,
4012 * there is actually a small window that the user could use to make
4013 * filename point to an accessible directory. So there is a faint
4014 * chance that someone could execute a setuid script down in a
4015 * non-accessible directory. I don't know what to do about that.
4016 * But I don't think it's too important. The manual lies when
4017 * it says access() is useful in setuid programs.
4019 * So, access() is pretty useless... but not harmful... do anyway.
4021 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
4022 Perl_croak(aTHX_ "Can't access() script\n");
4025 /* If we can swap euid and uid, then we can determine access rights
4026 * with a simple stat of the file, and then compare device and
4027 * inode to make sure we did stat() on the same file we opened.
4028 * Then we just have to make sure he or she can execute it.
4031 * As the script is opened by perl, not suidperl, we do not need to
4032 * care much about access rights.
4034 * The 'script changed' check is needed, or we can get lied to
4035 * about $0 with e.g.
4036 * suidperl /dev/fd/4//bin/x 4<setuidscript
4037 * Without HAS_SETREUID, is it safe to stat() as root?
4039 * Are there any operating systems that pass /dev/fd/xxx for setuid
4040 * scripts, as suggested/described in perlsec(1)? Surely they do not
4041 * pass the script name as we do, so the "script changed" test would
4042 * fail for them... but we never get here with
4043 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
4045 * This is one place where we must "lie" about return status: not
4046 * say if the stat() failed. We are doing this as root, and could
4047 * be tricked into reporting existence or not of files that the
4048 * "plain" user cannot even see.
4052 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
4053 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
4054 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
4055 Perl_croak(aTHX_ "Setuid script changed\n");
4059 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
4060 Perl_croak(aTHX_ "Real UID cannot exec script\n");
4063 * We used to do this check as the "plain" user (after swapping
4064 * UIDs). But the check for nosuid and noexec filesystem is needed,
4065 * and should be done even without HAS_SETREUID. (Maybe those
4066 * operating systems do not have such mount options anyway...)
4067 * Seems safe enough to do as root.
4069 #if !defined(NO_NOSUID_CHECK)
4070 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
4071 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4074 #endif /* IAMSUID */
4076 if (!S_ISREG(PL_statbuf.st_mode)) {
4077 Perl_croak(aTHX_ "Setuid script not plain file\n");
4079 if (PL_statbuf.st_mode & S_IWOTH)
4080 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4081 PL_doswitches = FALSE; /* -s is insecure in suid */
4082 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4083 CopLINE_inc(PL_curcop);
4084 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
4085 Perl_croak(aTHX_ "No #! line");
4086 linestr = SvPV_nolen_const(PL_linestr);
4087 /* required even on Sys V */
4088 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4089 Perl_croak(aTHX_ "No #! line");
4093 /* Sanity check on line length */
4094 s_end = s + strlen(s);
4095 if (s_end == s || (s_end - s) > 4000)
4096 Perl_croak(aTHX_ "Very long #! line");
4097 /* Allow more than a single space after #! */
4098 while (isSPACE(*s)) s++;
4099 /* Sanity check on buffer end */
4100 while ((*s) && !isSPACE(*s)) s++;
4101 for (s2 = s; (s2 > linestr &&
4102 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4103 || s2[-1] == '-')); s2--) ;
4104 /* Sanity check on buffer start */
4105 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4106 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4107 Perl_croak(aTHX_ "Not a perl script");
4108 while (*s == ' ' || *s == '\t') s++;
4110 * #! arg must be what we saw above. They can invoke it by
4111 * mentioning suidperl explicitly, but they may not add any strange
4112 * arguments beyond what #! says if they do invoke suidperl that way.
4115 * The way validarg was set up, we rely on the kernel to start
4116 * scripts with argv[1] set to contain all #! line switches (the
4120 * Check that we got all the arguments listed in the #! line (not
4121 * just that there are no extraneous arguments). Might not matter
4122 * much, as switches from #! line seem to be acted upon (also), and
4123 * so may be checked and trapped in perl. But, security checks must
4124 * be done in suidperl and not deferred to perl. Note that suidperl
4125 * does not get around to parsing (and checking) the switches on
4126 * the #! line (but execs perl sooner).
4127 * Allow (require) a trailing newline (which may be of two
4128 * characters on some architectures?) (but no other trailing
4131 len = strlen(validarg);
4132 if (strEQ(validarg," PHOOEY ") ||
4133 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4134 !((s_end - s) == len+1
4135 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4136 Perl_croak(aTHX_ "Args must match #! line");
4140 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4141 PL_euid == PL_statbuf.st_uid)
4143 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4144 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4145 #endif /* IAMSUID */
4148 PL_euid) { /* oops, we're not the setuid root perl */
4150 * When root runs a setuid script, we do not go through the same
4151 * steps of execing sperl and then perl with fd scripts, but
4152 * simply set up UIDs within the same perl invocation; so do
4153 * not have the same checks (on options, whatever) that we have
4154 * for plain users. No problem really: would have to be a script
4155 * that does not actually work for plain users; and if root is
4156 * foolish and can be persuaded to run such an unsafe script, he
4157 * might run also non-setuid ones, and deserves what he gets.
4159 * Or, we might drop the PL_euid check above (and rely just on
4160 * fdscript to avoid loops), and do the execs
4166 * Pass fd script to suidperl.
4167 * Exec suidperl, substituting fd script for scriptname.
4168 * Pass script name as "subdir" of fd, which perl will grok;
4169 * in fact will use that to distinguish this from "normal"
4170 * usage, see comments above.
4172 PerlIO_rewind(PL_rsfp);
4173 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4174 /* PSz 27 Feb 04 Sanity checks on scriptname */
4175 if ((!scriptname) || (!*scriptname) ) {
4176 Perl_croak(aTHX_ "No setuid script name\n");
4178 if (*scriptname == '-') {
4179 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4180 /* Or we might confuse it with an option when replacing
4181 * name in argument list, below (though we do pointer, not
4182 * string, comparisons).
4185 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4186 if (!PL_origargv[which]) {
4187 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4189 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4190 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4191 #if defined(HAS_FCNTL) && defined(F_SETFD)
4192 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4195 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4196 (int)PERL_REVISION, (int)PERL_VERSION,
4197 (int)PERL_SUBVERSION), PL_origargv);
4199 #endif /* IAMSUID */
4200 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4203 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4205 * This seems back to front: we try HAS_SETEGID first; if not available
4206 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4207 * in the sense that we only want to set EGID; but are there any machines
4208 * with either of the latter, but not the former? Same with UID, later.
4211 (void)setegid(PL_statbuf.st_gid);
4214 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4216 #ifdef HAS_SETRESGID
4217 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4219 PerlProc_setgid(PL_statbuf.st_gid);
4223 if (PerlProc_getegid() != PL_statbuf.st_gid)
4224 Perl_croak(aTHX_ "Can't do setegid!\n");
4226 if (PL_statbuf.st_mode & S_ISUID) {
4227 if (PL_statbuf.st_uid != PL_euid)
4229 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4232 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4234 #ifdef HAS_SETRESUID
4235 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4237 PerlProc_setuid(PL_statbuf.st_uid);
4241 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4242 Perl_croak(aTHX_ "Can't do seteuid!\n");
4244 else if (PL_uid) { /* oops, mustn't run as root */
4246 (void)seteuid((Uid_t)PL_uid);
4249 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4251 #ifdef HAS_SETRESUID
4252 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4254 PerlProc_setuid((Uid_t)PL_uid);
4258 if (PerlProc_geteuid() != PL_uid)
4259 Perl_croak(aTHX_ "Can't do seteuid!\n");
4262 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4263 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4266 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4267 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4268 else if (fdscript < 0 || suidscript != 1)
4269 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4270 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4272 /* PSz 16 Sep 03 Keep neat error message */
4273 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4276 /* We absolutely must clear out any saved ids here, so we */
4277 /* exec the real perl, substituting fd script for scriptname. */
4278 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4280 * It might be thought that using setresgid and/or setresuid (changed to
4281 * set the saved IDs) above might obviate the need to exec, and we could
4282 * go on to "do the perl thing".
4284 * Is there such a thing as "saved GID", and is that set for setuid (but
4285 * not setgid) execution like suidperl? Without exec, it would not be
4286 * cleared for setuid (but not setgid) scripts (or might need a dummy
4289 * We need suidperl to do the exact same argument checking that perl
4290 * does. Thus it cannot be very small; while it could be significantly
4291 * smaller, it is safer (simpler?) to make it essentially the same
4292 * binary as perl (but they are not identical). - Maybe could defer that
4293 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4294 * but prefer to do thorough checks in suidperl itself. Such deferral
4295 * would make suidperl security rely on perl, a design no-no.
4297 * Setuid things should be short and simple, thus easy to understand and
4298 * verify. They should do their "own thing", without influence by
4299 * attackers. It may help if their internal execution flow is fixed,
4300 * regardless of platform: it may be best to exec anyway.
4302 * Suidperl should at least be conceptually simple: a wrapper only,
4303 * never to do any real perl. Maybe we should put
4305 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4307 * into the perly bits.
4309 PerlIO_rewind(PL_rsfp);
4310 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4312 * Keep original arguments: suidperl already has fd script.
4314 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4315 /* if (!PL_origargv[which]) { */
4316 /* errno = EPERM; */
4317 /* Perl_croak(aTHX_ "Permission denied\n"); */
4319 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4320 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4321 #if defined(HAS_FCNTL) && defined(F_SETFD)
4322 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4325 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4326 (int)PERL_REVISION, (int)PERL_VERSION,
4327 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4329 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4330 #endif /* IAMSUID */
4332 PERL_UNUSED_ARG(fdscript);
4333 PERL_UNUSED_ARG(suidscript);
4334 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4335 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4336 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4337 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4339 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4342 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4343 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4344 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4345 /* not set-id, must be wrapped */
4348 PERL_UNUSED_ARG(validarg);
4349 PERL_UNUSED_ARG(scriptname);
4353 S_find_beginning(pTHX)
4356 register const char *s2;
4357 #ifdef MACOS_TRADITIONAL
4361 /* skip forward in input to the real script? */
4363 #ifdef MACOS_TRADITIONAL
4364 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4366 while (PL_doextract || gMacPerl_AlwaysExtract) {
4367 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4368 if (!gMacPerl_AlwaysExtract)
4369 Perl_croak(aTHX_ "No Perl script found in input\n");
4371 if (PL_doextract) /* require explicit override ? */
4372 if (!OverrideExtract(PL_origfilename))
4373 Perl_croak(aTHX_ "User aborted script\n");
4375 PL_doextract = FALSE;
4377 /* Pater peccavi, file does not have #! */
4378 PerlIO_rewind(PL_rsfp);
4383 while (PL_doextract) {
4384 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4385 Perl_croak(aTHX_ "No Perl script found in input\n");
4388 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4389 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4390 PL_doextract = FALSE;
4391 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4393 while (*s == ' ' || *s == '\t') s++;
4395 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4396 || s2[-1] == '_') s2--;
4397 if (strnEQ(s2-4,"perl",4))
4398 while ((s = moreswitches(s)))
4401 #ifdef MACOS_TRADITIONAL
4402 /* We are always searching for the #!perl line in MacPerl,
4403 * so if we find it, still keep the line count correct
4404 * by counting lines we already skipped over
4406 for (; maclines > 0 ; maclines--)
4407 PerlIO_ungetc(PL_rsfp, '\n');
4411 /* gMacPerl_AlwaysExtract is false in MPW tool */
4412 } else if (gMacPerl_AlwaysExtract) {
4423 PL_uid = PerlProc_getuid();
4424 PL_euid = PerlProc_geteuid();
4425 PL_gid = PerlProc_getgid();
4426 PL_egid = PerlProc_getegid();
4428 PL_uid |= PL_gid << 16;
4429 PL_euid |= PL_egid << 16;
4431 /* Should not happen: */
4432 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4433 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4436 * Should go by suidscript, not uid!=euid: why disallow
4437 * system("ls") in scripts run from setuid things?
4438 * Or, is this run before we check arguments and set suidscript?
4439 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4440 * (We never have suidscript, can we be sure to have fdscript?)
4441 * Or must then go by UID checks? See comments in forbid_setid also.
4445 /* This is used very early in the lifetime of the program,
4446 * before even the options are parsed, so PL_tainting has
4447 * not been initialized properly. */
4449 Perl_doing_taint(int argc, char *argv[], char *envp[])
4451 #ifndef PERL_IMPLICIT_SYS
4452 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4453 * before we have an interpreter-- and the whole point of this
4454 * function is to be called at such an early stage. If you are on
4455 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4456 * "tainted because running with altered effective ids', you'll
4457 * have to add your own checks somewhere in here. The two most
4458 * known samples of 'implicitness' are Win32 and NetWare, neither
4459 * of which has much of concept of 'uids'. */
4460 int uid = PerlProc_getuid();
4461 int euid = PerlProc_geteuid();
4462 int gid = PerlProc_getgid();
4463 int egid = PerlProc_getegid();
4470 if (uid && (euid != uid || egid != gid))
4472 #endif /* !PERL_IMPLICIT_SYS */
4473 /* This is a really primitive check; environment gets ignored only
4474 * if -T are the first chars together; otherwise one gets
4475 * "Too late" message. */
4476 if ( argc > 1 && argv[1][0] == '-'
4477 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4482 /* Passing the flag as a single char rather than a string is a slight space
4483 optimisation. The only message that isn't /^-.$/ is
4484 "program input from stdin", which is substituted in place of '\0', which
4485 could never be a command line flag. */
4487 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4489 char string[3] = "-x";
4490 const char *message = "program input from stdin";
4497 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4498 if (PL_euid != PL_uid)
4499 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4500 if (PL_egid != PL_gid)
4501 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4502 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4504 * Checks for UID/GID above "wrong": why disallow
4505 * perl -e 'print "Hello\n"'
4506 * from within setuid things?? Simply drop them: replaced by
4507 * fdscript/suidscript and #ifdef IAMSUID checks below.
4509 * This may be too late for command-line switches. Will catch those on
4510 * the #! line, after finding the script name and setting up
4511 * fdscript/suidscript. Note that suidperl does not get around to
4512 * parsing (and checking) the switches on the #! line, but checks that
4513 * the two sets are identical.
4515 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4516 * instead, or would that be "too late"? (We never have suidscript, can
4517 * we be sure to have fdscript?)
4519 * Catch things with suidscript (in descendant of suidperl), even with
4520 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4521 * below; but I am paranoid.
4523 * Also see comments about root running a setuid script, elsewhere.
4525 if (suidscript >= 0)
4526 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4528 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4529 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4530 #endif /* IAMSUID */
4534 Perl_init_debugger(pTHX)
4536 HV * const ostash = PL_curstash;
4538 PL_curstash = PL_debstash;
4539 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4541 AvREAL_off(PL_dbargs);
4542 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4543 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4544 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4545 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4546 sv_setiv(PL_DBsingle, 0);
4547 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4548 sv_setiv(PL_DBtrace, 0);
4549 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4550 sv_setiv(PL_DBsignal, 0);
4551 PL_curstash = ostash;
4554 #ifndef STRESS_REALLOC
4555 #define REASONABLE(size) (size)
4557 #define REASONABLE(size) (1) /* unreasonable */
4561 Perl_init_stacks(pTHX)
4563 /* start with 128-item stack and 8K cxstack */
4564 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4565 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4566 PL_curstackinfo->si_type = PERLSI_MAIN;
4567 PL_curstack = PL_curstackinfo->si_stack;
4568 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4570 PL_stack_base = AvARRAY(PL_curstack);
4571 PL_stack_sp = PL_stack_base;
4572 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4574 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4577 PL_tmps_max = REASONABLE(128);
4579 Newx(PL_markstack,REASONABLE(32),I32);
4580 PL_markstack_ptr = PL_markstack;
4581 PL_markstack_max = PL_markstack + REASONABLE(32);
4585 Newx(PL_scopestack,REASONABLE(32),I32);
4586 PL_scopestack_ix = 0;
4587 PL_scopestack_max = REASONABLE(32);
4589 Newx(PL_savestack,REASONABLE(128),ANY);
4590 PL_savestack_ix = 0;
4591 PL_savestack_max = REASONABLE(128);
4593 New(54,PL_retstack,REASONABLE(16),OP*);
4595 PL_retstack_max = REASONABLE(16);
4603 while (PL_curstackinfo->si_next)
4604 PL_curstackinfo = PL_curstackinfo->si_next;
4605 while (PL_curstackinfo) {
4606 PERL_SI *p = PL_curstackinfo->si_prev;
4607 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4608 Safefree(PL_curstackinfo->si_cxstack);
4609 Safefree(PL_curstackinfo);
4610 PL_curstackinfo = p;
4612 Safefree(PL_tmps_stack);
4613 Safefree(PL_markstack);
4614 Safefree(PL_scopestack);
4615 Safefree(PL_savestack);
4616 Safefree(PL_retstack);
4625 lex_start(PL_linestr);
4627 PL_subname = newSVpvs("main");
4631 S_init_predump_symbols(pTHX)
4636 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4637 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4638 GvMULTI_on(PL_stdingv);
4639 io = GvIOp(PL_stdingv);
4640 IoTYPE(io) = IoTYPE_RDONLY;
4641 IoIFP(io) = PerlIO_stdin();
4642 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4644 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4646 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4649 IoTYPE(io) = IoTYPE_WRONLY;
4650 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4652 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4654 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4656 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4657 GvMULTI_on(PL_stderrgv);
4658 io = GvIOp(PL_stderrgv);
4659 IoTYPE(io) = IoTYPE_WRONLY;
4660 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4661 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4663 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4665 PL_statname = newSV(0); /* last filename we did stat on */
4667 Safefree(PL_osname);
4668 PL_osname = savepv(OSNAME);
4672 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4674 argc--,argv++; /* skip name of script */
4675 if (PL_doswitches) {
4676 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4680 if (argv[0][1] == '-' && !argv[0][2]) {
4684 if ((s = strchr(argv[0], '='))) {
4685 const char *const start_name = argv[0] + 1;
4686 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4687 TRUE, SVt_PV)), s + 1);
4690 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4693 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4694 GvMULTI_on(PL_argvgv);
4695 (void)gv_AVadd(PL_argvgv);
4696 av_clear(GvAVn(PL_argvgv));
4697 for (; argc > 0; argc--,argv++) {
4698 SV * const sv = newSVpv(argv[0],0);
4699 av_push(GvAVn(PL_argvgv),sv);
4700 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4701 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4704 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4705 (void)sv_utf8_decode(sv);
4711 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4715 PL_toptarget = newSV(0);
4716 sv_upgrade(PL_toptarget, SVt_PVFM);
4717 sv_setpvn(PL_toptarget, "", 0);
4718 PL_bodytarget = newSV(0);
4719 sv_upgrade(PL_bodytarget, SVt_PVFM);
4720 sv_setpvn(PL_bodytarget, "", 0);
4721 PL_formtarget = PL_bodytarget;
4725 init_argv_symbols(argc,argv);
4727 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4728 #ifdef MACOS_TRADITIONAL
4729 /* $0 is not majick on a Mac */
4730 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4732 sv_setpv(GvSV(tmpgv),PL_origfilename);
4733 magicname("0", "0", 1);
4736 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4738 bool env_is_not_environ;
4739 GvMULTI_on(PL_envgv);
4740 hv = GvHVn(PL_envgv);
4741 hv_magic(hv, NULL, PERL_MAGIC_env);
4743 #ifdef USE_ENVIRON_ARRAY
4744 /* Note that if the supplied env parameter is actually a copy
4745 of the global environ then it may now point to free'd memory
4746 if the environment has been modified since. To avoid this
4747 problem we treat env==NULL as meaning 'use the default'
4751 env_is_not_environ = env != environ;
4752 if (env_is_not_environ
4753 # ifdef USE_ITHREADS
4754 && PL_curinterp == aTHX
4761 char** origenv = environ;
4764 for (; *env; env++) {
4765 if (!(s = strchr(*env,'=')) || s == *env)
4767 #if defined(MSDOS) && !defined(DJGPP)
4772 sv = newSVpv(s+1, 0);
4773 (void)hv_store(hv, *env, s - *env, sv, 0);
4774 if (env_is_not_environ)
4776 if (origenv != environ) {
4777 /* realloc has shifted us */
4778 env = (env - origenv) + environ;
4783 #endif /* USE_ENVIRON_ARRAY */
4784 #endif /* !PERL_MICRO */
4787 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4788 SvREADONLY_off(GvSV(tmpgv));
4789 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4790 SvREADONLY_on(GvSV(tmpgv));
4792 #ifdef THREADS_HAVE_PIDS
4793 PL_ppid = (IV)getppid();
4796 /* touch @F array to prevent spurious warnings 20020415 MJD */
4798 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4800 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4801 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4802 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4806 S_init_perllib(pTHX)
4811 s = PerlEnv_getenv("PERL5LIB");
4813 * It isn't possible to delete an environment variable with
4814 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4815 * case we treat PERL5LIB as undefined if it has a zero-length value.
4817 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4818 if (s && *s != '\0')
4822 incpush(s, TRUE, TRUE, TRUE, FALSE);
4824 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4826 /* Treat PERL5?LIB as a possible search list logical name -- the
4827 * "natural" VMS idiom for a Unix path string. We allow each
4828 * element to be a set of |-separated directories for compatibility.
4832 if (my_trnlnm("PERL5LIB",buf,0))
4833 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4835 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4839 /* Use the ~-expanded versions of APPLLIB (undocumented),
4840 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4843 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4847 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4849 #ifdef MACOS_TRADITIONAL
4852 SV * privdir = newSV(0);
4853 char * macperl = PerlEnv_getenv("MACPERL");
4858 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4859 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4860 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4861 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4862 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4863 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4865 SvREFCNT_dec(privdir);
4868 incpush(":", FALSE, FALSE, TRUE, FALSE);
4871 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4874 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4876 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4880 /* sitearch is always relative to sitelib on Windows for
4881 * DLL-based path intuition to work correctly */
4882 # if !defined(WIN32)
4883 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4889 /* this picks up sitearch as well */
4890 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4892 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4896 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4897 /* Search for version-specific dirs below here */
4898 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4901 #ifdef PERL_VENDORARCH_EXP
4902 /* vendorarch is always relative to vendorlib on Windows for
4903 * DLL-based path intuition to work correctly */
4904 # if !defined(WIN32)
4905 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4909 #ifdef PERL_VENDORLIB_EXP
4911 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4913 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4917 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4918 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4921 #ifdef PERL_OTHERLIBDIRS
4922 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4926 incpush(".", FALSE, FALSE, TRUE, FALSE);
4927 #endif /* MACOS_TRADITIONAL */
4930 #if defined(DOSISH) || defined(EPOC) || defined(SYMBIAN)
4931 # define PERLLIB_SEP ';'
4934 # define PERLLIB_SEP '|'
4936 # if defined(MACOS_TRADITIONAL)
4937 # define PERLLIB_SEP ','
4939 # define PERLLIB_SEP ':'
4943 #ifndef PERLLIB_MANGLE
4944 # define PERLLIB_MANGLE(s,n) (s)
4947 /* Push a directory onto @INC if it exists.
4948 Generate a new SV if we do this, to save needing to copy the SV we push
4951 S_incpush_if_exists(pTHX_ SV *dir)
4954 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4955 S_ISDIR(tmpstatbuf.st_mode)) {
4956 av_push(GvAVn(PL_incgv), dir);
4963 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4967 const char *p = dir;
4972 if (addsubdirs || addoldvers) {
4976 /* Break at all separators */
4978 SV *libdir = newSV(0);
4981 /* skip any consecutive separators */
4983 while ( *p == PERLLIB_SEP ) {
4984 /* Uncomment the next line for PATH semantics */
4985 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4990 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4991 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4996 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4997 p = NULL; /* break out */
4999 #ifdef MACOS_TRADITIONAL
5000 if (!strchr(SvPVX(libdir), ':')) {
5003 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
5005 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
5006 sv_catpvs(libdir, ":");
5009 /* Do the if() outside the #ifdef to avoid warnings about an unused
5012 #ifdef PERL_RELOCATABLE_INC
5014 * Relocatable include entries are marked with a leading .../
5017 * 0: Remove that leading ".../"
5018 * 1: Remove trailing executable name (anything after the last '/')
5019 * from the perl path to give a perl prefix
5021 * While the @INC element starts "../" and the prefix ends with a real
5022 * directory (ie not . or ..) chop that real directory off the prefix
5023 * and the leading "../" from the @INC element. ie a logical "../"
5025 * Finally concatenate the prefix and the remainder of the @INC element
5026 * The intent is that /usr/local/bin/perl and .../../lib/perl5
5027 * generates /usr/local/lib/perl5
5029 char *libpath = SvPVX(libdir);
5030 STRLEN libpath_len = SvCUR(libdir);
5031 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
5033 SV *caret_X = get_sv("\030", 0);
5034 /* Going to use the SV just as a scratch buffer holding a C
5040 /* $^X is *the* source of taint if tainting is on, hence
5041 SvPOK() won't be true. */
5043 assert(SvPOKp(caret_X));
5044 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
5045 /* Firstly take off the leading .../
5046 If all else fail we'll do the paths relative to the current
5048 sv_chop(libdir, libpath + 4);
5049 /* Don't use SvPV as we're intentionally bypassing taining,
5050 mortal copies that the mg_get of tainting creates, and
5051 corruption that seems to come via the save stack.
5052 I guess that the save stack isn't correctly set up yet. */
5053 libpath = SvPVX(libdir);
5054 libpath_len = SvCUR(libdir);
5056 /* This would work more efficiently with memrchr, but as it's
5057 only a GNU extension we'd need to probe for it and
5058 implement our own. Not hard, but maybe not worth it? */
5060 prefix = SvPVX(prefix_sv);
5061 lastslash = strrchr(prefix, '/');
5063 /* First time in with the *lastslash = '\0' we just wipe off
5064 the trailing /perl from (say) /usr/foo/bin/perl
5068 while ((*lastslash = '\0'), /* Do that, come what may. */
5069 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5070 && (lastslash = strrchr(prefix, '/')))) {
5071 if (lastslash[1] == '\0'
5072 || (lastslash[1] == '.'
5073 && (lastslash[2] == '/' /* ends "/." */
5074 || (lastslash[2] == '/'
5075 && lastslash[3] == '/' /* or "/.." */
5077 /* Prefix ends "/" or "/." or "/..", any of which
5078 are fishy, so don't do any more logical cleanup.
5082 /* Remove leading "../" from path */
5085 /* Next iteration round the loop removes the last
5086 directory name from prefix by writing a '\0' in
5087 the while clause. */
5089 /* prefix has been terminated with a '\0' to the correct
5090 length. libpath points somewhere into the libdir SV.
5091 We need to join the 2 with '/' and drop the result into
5093 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5094 SvREFCNT_dec(libdir);
5095 /* And this is the new libdir. */
5098 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5099 /* Need to taint reloccated paths if running set ID */
5100 SvTAINTED_on(libdir);
5103 SvREFCNT_dec(prefix_sv);
5108 * BEFORE pushing libdir onto @INC we may first push version- and
5109 * archname-specific sub-directories.
5111 if (addsubdirs || addoldvers) {
5112 #ifdef PERL_INC_VERSION_LIST
5113 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5114 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5115 const char * const *incver;
5121 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5123 while (unix[len-1] == '/') len--; /* Cosmetic */
5124 sv_usepvn(libdir,unix,len);
5127 PerlIO_printf(Perl_error_log,
5128 "Failed to unixify @INC element \"%s\"\n",
5132 #ifdef MACOS_TRADITIONAL
5133 #define PERL_AV_SUFFIX_FMT ""
5134 #define PERL_ARCH_FMT "%s:"
5135 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5137 #define PERL_AV_SUFFIX_FMT "/"
5138 #define PERL_ARCH_FMT "/%s"
5139 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5141 /* .../version/archname if -d .../version/archname */
5142 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5144 (int)PERL_REVISION, (int)PERL_VERSION,
5145 (int)PERL_SUBVERSION, ARCHNAME);
5146 subdir = S_incpush_if_exists(aTHX_ subdir);
5148 /* .../version if -d .../version */
5149 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5151 (int)PERL_REVISION, (int)PERL_VERSION,
5152 (int)PERL_SUBVERSION);
5153 subdir = S_incpush_if_exists(aTHX_ subdir);
5155 /* .../archname if -d .../archname */
5156 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5157 (void*)libdir, ARCHNAME);
5158 subdir = S_incpush_if_exists(aTHX_ subdir);
5162 #ifdef PERL_INC_VERSION_LIST
5164 for (incver = incverlist; *incver; incver++) {
5165 /* .../xxx if -d .../xxx */
5166 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, (void *)libdir, *incver);
5167 subdir = S_incpush_if_exists(aTHX_ subdir);
5173 /* finally push this lib directory on the end of @INC */
5174 av_push(GvAVn(PL_incgv), libdir);
5177 assert (SvREFCNT(subdir) == 1);
5178 SvREFCNT_dec(subdir);
5182 #ifdef USE_5005THREADS
5183 STATIC struct perl_thread *
5184 S_init_main_thread(pTHX)
5186 #if !defined(PERL_IMPLICIT_CONTEXT)
5187 struct perl_thread *thr;
5191 Newxz(thr, 1, struct perl_thread);
5192 PL_curcop = &PL_compiling;
5193 thr->interp = PERL_GET_INTERP;
5194 thr->cvcache = newHV();
5195 thr->threadsv = newAV();
5196 /* thr->threadsvp is set when find_threadsv is called */
5197 thr->specific = newAV();
5198 thr->flags = THRf_R_JOINABLE;
5199 MUTEX_INIT(&thr->mutex);
5200 /* Handcraft thrsv similarly to mess_sv */
5201 Newx(PL_thrsv, 1, SV);
5203 SvFLAGS(PL_thrsv) = SVt_PV;
5204 SvANY(PL_thrsv) = (void*)xpv;
5205 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
5206 SvPV_set(PL_thrsv, (char*)thr);
5207 SvCUR_set(PL_thrsv, sizeof(thr));
5208 SvLEN_set(PL_thrsv, sizeof(thr));
5209 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
5210 thr->oursv = PL_thrsv;
5211 PL_chopset = " \n-";
5214 MUTEX_LOCK(&PL_threads_mutex);
5220 MUTEX_UNLOCK(&PL_threads_mutex);
5222 #ifdef HAVE_THREAD_INTERN
5223 Perl_init_thread_intern(thr);
5226 #ifdef SET_THREAD_SELF
5227 SET_THREAD_SELF(thr);
5229 thr->self = pthread_self();
5230 #endif /* SET_THREAD_SELF */
5234 * These must come after the thread self setting
5235 * because sv_setpvn does SvTAINT and the taint
5236 * fields thread selfness being set.
5238 PL_toptarget = newSV(0);
5239 sv_upgrade(PL_toptarget, SVt_PVFM);
5240 sv_setpvn(PL_toptarget, "", 0);
5241 PL_bodytarget = newSV(0);
5242 sv_upgrade(PL_bodytarget, SVt_PVFM);
5243 sv_setpvn(PL_bodytarget, "", 0);
5244 PL_formtarget = PL_bodytarget;
5245 thr->errsv = newSVpvs("");
5246 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
5249 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
5250 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
5251 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
5252 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
5253 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
5254 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
5256 PL_reginterp_cnt = 0;
5260 #endif /* USE_5005THREADS */
5263 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5266 const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5272 while (av_len(paramList) >= 0) {
5273 cv = (CV*)av_shift(paramList);
5275 if (paramList == PL_beginav) {
5276 /* save PL_beginav for compiler */
5277 if (! PL_beginav_save)
5278 PL_beginav_save = newAV();
5279 av_push(PL_beginav_save, (SV*)cv);
5281 else if (paramList == PL_checkav) {
5282 /* save PL_checkav for compiler */
5283 if (! PL_checkav_save)
5284 PL_checkav_save = newAV();
5285 av_push(PL_checkav_save, (SV*)cv);
5290 #ifdef PERL_FLEXIBLE_EXCEPTIONS
5291 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_list_body), cv);
5297 #ifndef PERL_FLEXIBLE_EXCEPTIONS
5301 (void)SvPV_const(atsv, len);
5303 PL_curcop = &PL_compiling;
5304 CopLINE_set(PL_curcop, oldline);
5305 if (paramList == PL_beginav)
5306 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5308 Perl_sv_catpvf(aTHX_ atsv,
5309 "%s failed--call queue aborted",
5310 paramList == PL_checkav ? "CHECK"
5311 : paramList == PL_initav ? "INIT"
5313 while (PL_scopestack_ix > oldscope)
5316 Perl_croak(aTHX_ "%"SVf"", (void*)atsv);
5323 /* my_exit() was called */
5324 while (PL_scopestack_ix > oldscope)
5327 PL_curstash = PL_defstash;
5328 PL_curcop = &PL_compiling;
5329 CopLINE_set(PL_curcop, oldline);
5331 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5332 if (paramList == PL_beginav)
5333 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5335 Perl_croak(aTHX_ "%s failed--call queue aborted",
5336 paramList == PL_checkav ? "CHECK"
5337 : paramList == PL_initav ? "INIT"
5344 PL_curcop = &PL_compiling;
5345 CopLINE_set(PL_curcop, oldline);
5348 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5356 #ifdef PERL_FLEXIBLE_EXCEPTIONS
5358 S_vcall_list_body(pTHX_ va_list args)
5360 CV *cv = va_arg(args, CV*);
5361 return call_list_body(cv);
5366 S_call_list_body(pTHX_ CV *cv)
5368 PUSHMARK(PL_stack_sp);
5369 call_sv((SV*)cv, G_EVAL|G_DISCARD);
5374 Perl_my_exit(pTHX_ U32 status)
5376 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5377 thr, (unsigned long) status));
5386 STATUS_EXIT_SET(status);
5393 Perl_my_failure_exit(pTHX)
5396 /* We have been called to fall on our sword. The desired exit code
5397 * should be already set in STATUS_UNIX, but could be shifted over
5398 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5401 * If an error code has not been set, then force the issue.
5403 if (MY_POSIX_EXIT) {
5405 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5406 * the exit code when there isn't an error.
5409 if (STATUS_UNIX == 0)
5410 STATUS_UNIX_EXIT_SET(255);
5412 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5414 /* The exit code could have been set by $? or vmsish which
5415 * means that it may not be fatal. So convert
5416 * success/warning codes to fatal.
5418 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5419 STATUS_UNIX_EXIT_SET(255);
5423 /* Traditionally Perl on VMS always expects a Fatal Error. */
5424 if (vaxc$errno & 1) {
5426 /* So force success status to failure */
5427 if (STATUS_NATIVE & 1)
5432 STATUS_UNIX = EINTR; /* In case something cares */
5437 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5439 /* Encode the severity code */
5440 severity = STATUS_NATIVE & STS$M_SEVERITY;
5441 STATUS_UNIX = (severity ? severity : 1) << 8;
5443 /* Perl expects this to be a fatal error */
5444 if (severity != STS$K_SEVERE)
5453 STATUS_UNIX_SET(errno);
5455 exitstatus = STATUS_UNIX >> 8;
5456 if (exitstatus & 255)
5457 STATUS_UNIX_SET(exitstatus);
5459 STATUS_UNIX_SET(255);
5466 S_my_exit_jump(pTHX)
5470 SvREFCNT_dec(PL_e_script);
5474 POPSTACK_TO(PL_mainstack);
5482 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5484 const char * const p = SvPVX_const(PL_e_script);
5485 const char *nl = strchr(p, '\n');
5487 PERL_UNUSED_ARG(idx);
5488 PERL_UNUSED_ARG(maxlen);
5490 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5492 filter_del(read_e_script);
5495 sv_catpvn(buf_sv, p, nl-p);
5496 sv_chop(PL_e_script, (char *) nl);
5502 * c-indentation-style: bsd
5504 * indent-tabs-mode: t
5507 * ex: set ts=8 sts=4 sw=4 noet: