3 * Copyright (c) 1987-2002 Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 #define PERL_IN_PERL_C
17 #include "patchlevel.h" /* for local_patches */
21 char *nw_get_sitelib(const char *pl);
24 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
29 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
30 char *getenv (char *); /* Usually in <stdlib.h> */
33 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
41 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
47 #if defined(USE_5005THREADS)
48 # define INIT_TLS_AND_INTERP \
50 if (!PL_curinterp) { \
51 PERL_SET_INTERP(my_perl); \
57 # if defined(USE_ITHREADS)
58 # define INIT_TLS_AND_INTERP \
60 if (!PL_curinterp) { \
61 PERL_SET_INTERP(my_perl); \
64 PERL_SET_THX(my_perl); \
68 PERL_SET_THX(my_perl); \
72 # define INIT_TLS_AND_INTERP \
74 if (!PL_curinterp) { \
75 PERL_SET_INTERP(my_perl); \
77 PERL_SET_THX(my_perl); \
82 #ifdef PERL_IMPLICIT_SYS
84 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
85 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
86 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
87 struct IPerlDir* ipD, struct IPerlSock* ipS,
88 struct IPerlProc* ipP)
90 PerlInterpreter *my_perl;
91 /* New() needs interpreter, so call malloc() instead */
92 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
94 Zero(my_perl, 1, PerlInterpreter);
110 =head1 Embedding Functions
112 =for apidoc perl_alloc
114 Allocates a new Perl interpreter. See L<perlembed>.
122 PerlInterpreter *my_perl;
123 #ifdef USE_5005THREADS
127 /* New() needs interpreter, so call malloc() instead */
128 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
131 Zero(my_perl, 1, PerlInterpreter);
134 #endif /* PERL_IMPLICIT_SYS */
137 =for apidoc perl_construct
139 Initializes a new Perl interpreter. See L<perlembed>.
145 perl_construct(pTHXx)
147 #ifdef USE_5005THREADS
149 struct perl_thread *thr = NULL;
150 #endif /* FAKE_THREADS */
151 #endif /* USE_5005THREADS */
155 PL_perl_destruct_level = 1;
157 if (PL_perl_destruct_level > 0)
161 /* Init the real globals (and main thread)? */
163 #ifdef USE_5005THREADS
164 MUTEX_INIT(&PL_sv_mutex);
166 * Safe to use basic SV functions from now on (though
167 * not things like mortals or tainting yet).
169 MUTEX_INIT(&PL_eval_mutex);
170 COND_INIT(&PL_eval_cond);
171 MUTEX_INIT(&PL_threads_mutex);
172 COND_INIT(&PL_nthreads_cond);
173 # ifdef EMULATE_ATOMIC_REFCOUNTS
174 MUTEX_INIT(&PL_svref_mutex);
175 # endif /* EMULATE_ATOMIC_REFCOUNTS */
177 MUTEX_INIT(&PL_cred_mutex);
178 MUTEX_INIT(&PL_sv_lock_mutex);
179 MUTEX_INIT(&PL_fdpid_mutex);
181 thr = init_main_thread();
182 #endif /* USE_5005THREADS */
184 #ifdef PERL_FLEXIBLE_EXCEPTIONS
185 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
188 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
190 PL_linestr = NEWSV(65,79);
191 sv_upgrade(PL_linestr,SVt_PVIV);
193 if (!SvREADONLY(&PL_sv_undef)) {
194 /* set read-only and try to insure than we wont see REFCNT==0
197 SvREADONLY_on(&PL_sv_undef);
198 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
200 sv_setpv(&PL_sv_no,PL_No);
202 SvREADONLY_on(&PL_sv_no);
203 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
205 sv_setpv(&PL_sv_yes,PL_Yes);
207 SvREADONLY_on(&PL_sv_yes);
208 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
211 PL_sighandlerp = Perl_sighandler;
212 PL_pidstatus = newHV();
215 PL_rs = newSVpvn("\n", 1);
220 PL_lex_state = LEX_NOTPARSING;
226 SET_NUMERIC_STANDARD();
230 PL_patchlevel = NEWSV(0,4);
231 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
232 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
233 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
234 s = (U8*)SvPVX(PL_patchlevel);
235 /* Build version strings using "native" characters */
236 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
237 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
238 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
240 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
241 SvPOK_on(PL_patchlevel);
242 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
243 + ((NV)PERL_VERSION / (NV)1000)
244 #if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
245 + ((NV)PERL_SUBVERSION / (NV)1000000)
248 SvNOK_on(PL_patchlevel); /* dual valued */
249 SvUTF8_on(PL_patchlevel);
250 SvREADONLY_on(PL_patchlevel);
253 #if defined(LOCAL_PATCH_COUNT)
254 PL_localpatches = local_patches; /* For possible -v */
257 #ifdef HAVE_INTERP_INTERN
261 PerlIO_init(aTHX); /* Hook to IO system */
263 PL_fdpid = newAV(); /* for remembering popen pids by fd */
264 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
265 PL_errors = newSVpvn("",0);
266 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
267 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
268 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
270 PL_regex_padav = newAV();
271 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
272 PL_regex_pad = AvARRAY(PL_regex_padav);
274 #ifdef USE_REENTRANT_API
275 Perl_reentrant_init(aTHX);
278 /* Note that strtab is a rather special HV. Assumptions are made
279 about not iterating on it, and not adding tie magic to it.
280 It is properly deallocated in perl_destruct() */
283 #ifdef USE_5005THREADS
284 MUTEX_INIT(&PL_strtab_mutex);
286 HvSHAREKEYS_off(PL_strtab); /* mandatory */
287 hv_ksplit(PL_strtab, 512);
289 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
290 _dyld_lookup_and_bind
291 ("__environ", (unsigned long *) &environ_pointer, NULL);
294 #ifdef USE_ENVIRON_ARRAY
295 PL_origenviron = environ;
302 =for apidoc nothreadhook
304 Stub that provides thread hook for perl_destruct when there are
311 Perl_nothreadhook(pTHX)
317 =for apidoc perl_destruct
319 Shuts down a Perl interpreter. See L<perlembed>.
327 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
329 #ifdef USE_5005THREADS
332 #endif /* USE_5005THREADS */
334 /* wait for all pseudo-forked children to finish */
335 PERL_WAIT_FOR_CHILDREN;
337 #ifdef USE_5005THREADS
339 /* Pass 1 on any remaining threads: detach joinables, join zombies */
341 MUTEX_LOCK(&PL_threads_mutex);
342 DEBUG_S(PerlIO_printf(Perl_debug_log,
343 "perl_destruct: waiting for %d threads...\n",
345 for (t = thr->next; t != thr; t = t->next) {
346 MUTEX_LOCK(&t->mutex);
347 switch (ThrSTATE(t)) {
350 DEBUG_S(PerlIO_printf(Perl_debug_log,
351 "perl_destruct: joining zombie %p\n", t));
352 ThrSETSTATE(t, THRf_DEAD);
353 MUTEX_UNLOCK(&t->mutex);
356 * The SvREFCNT_dec below may take a long time (e.g. av
357 * may contain an object scalar whose destructor gets
358 * called) so we have to unlock threads_mutex and start
361 MUTEX_UNLOCK(&PL_threads_mutex);
363 SvREFCNT_dec((SV*)av);
364 DEBUG_S(PerlIO_printf(Perl_debug_log,
365 "perl_destruct: joined zombie %p OK\n", t));
367 case THRf_R_JOINABLE:
368 DEBUG_S(PerlIO_printf(Perl_debug_log,
369 "perl_destruct: detaching thread %p\n", t));
370 ThrSETSTATE(t, THRf_R_DETACHED);
372 * We unlock threads_mutex and t->mutex in the opposite order
373 * from which we locked them just so that DETACH won't
374 * deadlock if it panics. It's only a breach of good style
375 * not a bug since they are unlocks not locks.
377 MUTEX_UNLOCK(&PL_threads_mutex);
379 MUTEX_UNLOCK(&t->mutex);
382 DEBUG_S(PerlIO_printf(Perl_debug_log,
383 "perl_destruct: ignoring %p (state %u)\n",
385 MUTEX_UNLOCK(&t->mutex);
386 /* fall through and out */
389 /* We leave the above "Pass 1" loop with threads_mutex still locked */
391 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
392 while (PL_nthreads > 1)
394 DEBUG_S(PerlIO_printf(Perl_debug_log,
395 "perl_destruct: final wait for %d threads\n",
397 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
399 /* At this point, we're the last thread */
400 MUTEX_UNLOCK(&PL_threads_mutex);
401 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
402 MUTEX_DESTROY(&PL_threads_mutex);
403 COND_DESTROY(&PL_nthreads_cond);
405 #endif /* !defined(FAKE_THREADS) */
406 #endif /* USE_5005THREADS */
408 destruct_level = PL_perl_destruct_level;
412 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
414 if (destruct_level < i)
421 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
426 if (PL_endav && !PL_minus_c)
427 call_list(PL_scopestack_ix, PL_endav);
433 /* Need to flush since END blocks can produce output */
434 PerlIO_flush((PerlIO*)NULL);
436 if (CALL_FPTR(PL_threadhook)(aTHX)) {
437 /* Threads hook has vetoed further cleanup */
438 return STATUS_NATIVE_EXPORT;;
441 /* We must account for everything. */
443 /* Destroy the main CV and syntax tree */
445 PL_curpad = AvARRAY(PL_comppad);
446 op_free(PL_main_root);
447 PL_main_root = Nullop;
449 PL_curcop = &PL_compiling;
450 PL_main_start = Nullop;
451 SvREFCNT_dec(PL_main_cv);
455 /* Tell PerlIO we are about to tear things apart in case
456 we have layers which are using resources that should
460 PerlIO_destruct(aTHX);
462 if (PL_sv_objcount) {
464 * Try to destruct global references. We do this first so that the
465 * destructors and destructees still exist. Some sv's might remain.
466 * Non-referenced objects are on their own.
471 /* unhook hooks which will soon be, or use, destroyed data */
472 SvREFCNT_dec(PL_warnhook);
473 PL_warnhook = Nullsv;
474 SvREFCNT_dec(PL_diehook);
477 /* call exit list functions */
478 while (PL_exitlistlen-- > 0)
479 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
481 Safefree(PL_exitlist);
483 if (destruct_level == 0){
485 DEBUG_P(debprofdump());
487 #if defined(PERLIO_LAYERS)
488 /* No more IO - including error messages ! */
489 PerlIO_cleanup(aTHX);
492 /* The exit() function will do everything that needs doing. */
493 return STATUS_NATIVE_EXPORT;;
496 /* jettison our possibly duplicated environment */
497 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
498 * so we certainly shouldn't free it here
500 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
501 if (environ != PL_origenviron
503 /* only main thread can free environ[0] contents */
504 && PL_curinterp == aTHX
510 for (i = 0; environ[i]; i++)
511 safesysfree(environ[i]);
513 /* Must use safesysfree() when working with environ. */
514 safesysfree(environ);
516 environ = PL_origenviron;
521 /* the syntax tree is shared between clones
522 * so op_free(PL_main_root) only ReREFCNT_dec's
523 * REGEXPs in the parent interpreter
524 * we need to manually ReREFCNT_dec for the clones
527 I32 i = AvFILLp(PL_regex_padav) + 1;
528 SV **ary = AvARRAY(PL_regex_padav);
532 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
534 if (SvFLAGS(resv) & SVf_BREAK) {
535 /* this is PL_reg_curpm, already freed
536 * flag is set in regexec.c:S_regtry
538 SvFLAGS(resv) &= ~SVf_BREAK;
540 else if(SvREPADTMP(resv)) {
541 SvREPADTMP_off(resv);
548 SvREFCNT_dec(PL_regex_padav);
549 PL_regex_padav = Nullav;
553 /* loosen bonds of global variables */
556 (void)PerlIO_close(PL_rsfp);
560 /* Filters for program text */
561 SvREFCNT_dec(PL_rsfp_filters);
562 PL_rsfp_filters = Nullav;
565 PL_preprocess = FALSE;
571 PL_doswitches = FALSE;
572 PL_dowarn = G_WARN_OFF;
573 PL_doextract = FALSE;
574 PL_sawampersand = FALSE; /* must save all match strings */
577 Safefree(PL_inplace);
579 SvREFCNT_dec(PL_patchlevel);
582 SvREFCNT_dec(PL_e_script);
583 PL_e_script = Nullsv;
586 while (--PL_origargc >= 0) {
587 Safefree(PL_origargv[PL_origargc]);
589 Safefree(PL_origargv);
591 /* magical thingies */
593 SvREFCNT_dec(PL_ofs_sv); /* $, */
596 SvREFCNT_dec(PL_ors_sv); /* $\ */
599 SvREFCNT_dec(PL_rs); /* $/ */
602 PL_multiline = 0; /* $* */
603 Safefree(PL_osname); /* $^O */
606 SvREFCNT_dec(PL_statname);
607 PL_statname = Nullsv;
610 /* defgv, aka *_ should be taken care of elsewhere */
612 /* clean up after study() */
613 SvREFCNT_dec(PL_lastscream);
614 PL_lastscream = Nullsv;
615 Safefree(PL_screamfirst);
617 Safefree(PL_screamnext);
621 Safefree(PL_efloatbuf);
622 PL_efloatbuf = Nullch;
625 /* startup and shutdown function lists */
626 SvREFCNT_dec(PL_beginav);
627 SvREFCNT_dec(PL_beginav_save);
628 SvREFCNT_dec(PL_endav);
629 SvREFCNT_dec(PL_checkav);
630 SvREFCNT_dec(PL_initav);
632 PL_beginav_save = Nullav;
637 /* shortcuts just get cleared */
643 PL_argvoutgv = Nullgv;
645 PL_stderrgv = Nullgv;
646 PL_last_in_gv = Nullgv;
648 PL_debstash = Nullhv;
650 /* reset so print() ends up where we expect */
653 SvREFCNT_dec(PL_argvout_stack);
654 PL_argvout_stack = Nullav;
656 SvREFCNT_dec(PL_modglobal);
657 PL_modglobal = Nullhv;
658 SvREFCNT_dec(PL_preambleav);
659 PL_preambleav = Nullav;
660 SvREFCNT_dec(PL_subname);
662 SvREFCNT_dec(PL_linestr);
664 SvREFCNT_dec(PL_pidstatus);
665 PL_pidstatus = Nullhv;
666 SvREFCNT_dec(PL_toptarget);
667 PL_toptarget = Nullsv;
668 SvREFCNT_dec(PL_bodytarget);
669 PL_bodytarget = Nullsv;
670 PL_formtarget = Nullsv;
672 /* free locale stuff */
673 #ifdef USE_LOCALE_COLLATE
674 Safefree(PL_collation_name);
675 PL_collation_name = Nullch;
678 #ifdef USE_LOCALE_NUMERIC
679 Safefree(PL_numeric_name);
680 PL_numeric_name = Nullch;
681 SvREFCNT_dec(PL_numeric_radix_sv);
684 /* clear utf8 character classes */
685 SvREFCNT_dec(PL_utf8_alnum);
686 SvREFCNT_dec(PL_utf8_alnumc);
687 SvREFCNT_dec(PL_utf8_ascii);
688 SvREFCNT_dec(PL_utf8_alpha);
689 SvREFCNT_dec(PL_utf8_space);
690 SvREFCNT_dec(PL_utf8_cntrl);
691 SvREFCNT_dec(PL_utf8_graph);
692 SvREFCNT_dec(PL_utf8_digit);
693 SvREFCNT_dec(PL_utf8_upper);
694 SvREFCNT_dec(PL_utf8_lower);
695 SvREFCNT_dec(PL_utf8_print);
696 SvREFCNT_dec(PL_utf8_punct);
697 SvREFCNT_dec(PL_utf8_xdigit);
698 SvREFCNT_dec(PL_utf8_mark);
699 SvREFCNT_dec(PL_utf8_toupper);
700 SvREFCNT_dec(PL_utf8_totitle);
701 SvREFCNT_dec(PL_utf8_tolower);
702 SvREFCNT_dec(PL_utf8_tofold);
703 SvREFCNT_dec(PL_utf8_idstart);
704 SvREFCNT_dec(PL_utf8_idcont);
705 PL_utf8_alnum = Nullsv;
706 PL_utf8_alnumc = Nullsv;
707 PL_utf8_ascii = Nullsv;
708 PL_utf8_alpha = Nullsv;
709 PL_utf8_space = Nullsv;
710 PL_utf8_cntrl = Nullsv;
711 PL_utf8_graph = Nullsv;
712 PL_utf8_digit = Nullsv;
713 PL_utf8_upper = Nullsv;
714 PL_utf8_lower = Nullsv;
715 PL_utf8_print = Nullsv;
716 PL_utf8_punct = Nullsv;
717 PL_utf8_xdigit = Nullsv;
718 PL_utf8_mark = Nullsv;
719 PL_utf8_toupper = Nullsv;
720 PL_utf8_totitle = Nullsv;
721 PL_utf8_tolower = Nullsv;
722 PL_utf8_tofold = Nullsv;
723 PL_utf8_idstart = Nullsv;
724 PL_utf8_idcont = Nullsv;
726 if (!specialWARN(PL_compiling.cop_warnings))
727 SvREFCNT_dec(PL_compiling.cop_warnings);
728 PL_compiling.cop_warnings = Nullsv;
729 if (!specialCopIO(PL_compiling.cop_io))
730 SvREFCNT_dec(PL_compiling.cop_io);
731 PL_compiling.cop_io = Nullsv;
732 CopFILE_free(&PL_compiling);
733 CopSTASH_free(&PL_compiling);
735 /* Prepare to destruct main symbol table. */
740 SvREFCNT_dec(PL_curstname);
741 PL_curstname = Nullsv;
743 /* clear queued errors */
744 SvREFCNT_dec(PL_errors);
748 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
749 if (PL_scopestack_ix != 0)
750 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
751 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
752 (long)PL_scopestack_ix);
753 if (PL_savestack_ix != 0)
754 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
755 "Unbalanced saves: %ld more saves than restores\n",
756 (long)PL_savestack_ix);
757 if (PL_tmps_floor != -1)
758 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
759 (long)PL_tmps_floor + 1);
760 if (cxstack_ix != -1)
761 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
762 (long)cxstack_ix + 1);
765 /* Now absolutely destruct everything, somehow or other, loops or no. */
766 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
767 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
769 /* the 2 is for PL_fdpid and PL_strtab */
770 while (PL_sv_count > 2 && sv_clean_all())
773 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
774 SvFLAGS(PL_fdpid) |= SVt_PVAV;
775 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
776 SvFLAGS(PL_strtab) |= SVt_PVHV;
778 AvREAL_off(PL_fdpid); /* no surviving entries */
779 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
782 #ifdef HAVE_INTERP_INTERN
786 /* Destruct the global string table. */
788 /* Yell and reset the HeVAL() slots that are still holding refcounts,
789 * so that sv_free() won't fail on them.
797 max = HvMAX(PL_strtab);
798 array = HvARRAY(PL_strtab);
801 if (hent && ckWARN_d(WARN_INTERNAL)) {
802 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
803 "Unbalanced string table refcount: (%d) for \"%s\"",
804 HeVAL(hent) - Nullsv, HeKEY(hent));
805 HeVAL(hent) = Nullsv;
815 SvREFCNT_dec(PL_strtab);
818 /* free the pointer table used for cloning */
819 ptr_table_free(PL_ptr_table);
822 /* free special SVs */
824 SvREFCNT(&PL_sv_yes) = 0;
825 sv_clear(&PL_sv_yes);
826 SvANY(&PL_sv_yes) = NULL;
827 SvFLAGS(&PL_sv_yes) = 0;
829 SvREFCNT(&PL_sv_no) = 0;
831 SvANY(&PL_sv_no) = NULL;
832 SvFLAGS(&PL_sv_no) = 0;
836 for (i=0; i<=2; i++) {
837 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
838 sv_clear(PERL_DEBUG_PAD(i));
839 SvANY(PERL_DEBUG_PAD(i)) = NULL;
840 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
844 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
845 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
847 #if defined(PERLIO_LAYERS)
848 /* No more IO - including error messages ! */
849 PerlIO_cleanup(aTHX);
852 /* sv_undef needs to stay immortal until after PerlIO_cleanup
853 as currently layers use it rather than Nullsv as a marker
854 for no arg - and will try and SvREFCNT_dec it.
856 SvREFCNT(&PL_sv_undef) = 0;
857 SvREADONLY_off(&PL_sv_undef);
859 Safefree(PL_origfilename);
860 Safefree(PL_reg_start_tmp);
862 Safefree(PL_reg_curpm);
863 Safefree(PL_reg_poscache);
864 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
865 Safefree(PL_op_mask);
866 Safefree(PL_psig_ptr);
867 Safefree(PL_psig_name);
868 Safefree(PL_bitcount);
869 Safefree(PL_psig_pend);
871 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
873 DEBUG_P(debprofdump());
874 #ifdef USE_5005THREADS
875 MUTEX_DESTROY(&PL_strtab_mutex);
876 MUTEX_DESTROY(&PL_sv_mutex);
877 MUTEX_DESTROY(&PL_eval_mutex);
878 MUTEX_DESTROY(&PL_cred_mutex);
879 MUTEX_DESTROY(&PL_fdpid_mutex);
880 COND_DESTROY(&PL_eval_cond);
881 #ifdef EMULATE_ATOMIC_REFCOUNTS
882 MUTEX_DESTROY(&PL_svref_mutex);
883 #endif /* EMULATE_ATOMIC_REFCOUNTS */
885 /* As the penultimate thing, free the non-arena SV for thrsv */
886 Safefree(SvPVX(PL_thrsv));
887 Safefree(SvANY(PL_thrsv));
890 #endif /* USE_5005THREADS */
892 #ifdef USE_REENTRANT_API
893 Perl_reentrant_free(aTHX);
898 /* As the absolutely last thing, free the non-arena SV for mess() */
901 /* it could have accumulated taint magic */
902 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
905 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
906 moremagic = mg->mg_moremagic;
907 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
909 Safefree(mg->mg_ptr);
913 /* we know that type >= SVt_PV */
914 (void)SvOOK_off(PL_mess_sv);
915 Safefree(SvPVX(PL_mess_sv));
916 Safefree(SvANY(PL_mess_sv));
917 Safefree(PL_mess_sv);
920 return STATUS_NATIVE_EXPORT;
924 =for apidoc perl_free
926 Releases a Perl interpreter. See L<perlembed>.
934 #if defined(WIN32) || defined(NETWARE)
935 # if defined(PERL_IMPLICIT_SYS)
937 void *host = nw_internal_host;
939 void *host = w32_internal_host;
943 nw_delete_internal_host(host);
945 win32_delete_internal_host(host);
956 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
958 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
959 PL_exitlist[PL_exitlistlen].fn = fn;
960 PL_exitlist[PL_exitlistlen].ptr = ptr;
965 =for apidoc perl_parse
967 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
973 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
978 #ifdef USE_5005THREADS
982 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
985 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
986 setuid perl scripts securely.\n");
992 /* we copy rather than point to argv
993 * since perl_clone will copy and perl_destruct
994 * has no way of knowing if we've made a copy or
998 New(0, PL_origargv, i+1, char*);
999 PL_origargv[i] = '\0';
1001 PL_origargv[i] = savepv(argv[i]);
1009 /* Come here if running an undumped a.out. */
1011 PL_origfilename = savepv(argv[0]);
1012 PL_do_undump = FALSE;
1013 cxstack_ix = -1; /* start label stack again */
1015 init_postdump_symbols(argc,argv,env);
1020 PL_curpad = AvARRAY(PL_comppad);
1021 op_free(PL_main_root);
1022 PL_main_root = Nullop;
1024 PL_main_start = Nullop;
1025 SvREFCNT_dec(PL_main_cv);
1026 PL_main_cv = Nullcv;
1029 oldscope = PL_scopestack_ix;
1030 PL_dowarn = G_WARN_OFF;
1032 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1033 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
1039 #ifndef PERL_FLEXIBLE_EXCEPTIONS
1040 parse_body(env,xsinit);
1043 call_list(oldscope, PL_checkav);
1050 /* my_exit() was called */
1051 while (PL_scopestack_ix > oldscope)
1054 PL_curstash = PL_defstash;
1056 call_list(oldscope, PL_checkav);
1057 ret = STATUS_NATIVE_EXPORT;
1060 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1068 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1070 S_vparse_body(pTHX_ va_list args)
1072 char **env = va_arg(args, char**);
1073 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1075 return parse_body(env, xsinit);
1080 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1082 int argc = PL_origargc;
1083 char **argv = PL_origargv;
1084 char *scriptname = NULL;
1086 VOL bool dosearch = FALSE;
1087 char *validarg = "";
1091 char *cddir = Nullch;
1093 sv_setpvn(PL_linestr,"",0);
1094 sv = newSVpvn("",0); /* first used for -I flags */
1098 for (argc--,argv++; argc > 0; argc--,argv++) {
1099 if (argv[0][0] != '-' || !argv[0][1])
1103 validarg = " PHOOEY ";
1112 win32_argv2utf8(argc-1, argv+1);
1115 #ifndef PERL_STRICT_CR
1139 if ((s = moreswitches(s)))
1144 if( !PL_tainting ) {
1145 PL_taint_warn = TRUE;
1152 PL_taint_warn = FALSE;
1157 #ifdef MACOS_TRADITIONAL
1158 /* ignore -e for Dev:Pseudo argument */
1159 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1162 if (PL_euid != PL_uid || PL_egid != PL_gid)
1163 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
1165 PL_e_script = newSVpvn("",0);
1166 filter_add(read_e_script, NULL);
1169 sv_catpv(PL_e_script, s);
1171 sv_catpv(PL_e_script, argv[1]);
1175 Perl_croak(aTHX_ "No code specified for -e");
1176 sv_catpv(PL_e_script, "\n");
1179 case 'I': /* -I handled both here and in moreswitches() */
1181 if (!*++s && (s=argv[1]) != Nullch) {
1186 STRLEN len = strlen(s);
1187 p = savepvn(s, len);
1188 incpush(p, TRUE, TRUE);
1189 sv_catpvn(sv, "-I", 2);
1190 sv_catpvn(sv, p, len);
1191 sv_catpvn(sv, " ", 1);
1195 Perl_croak(aTHX_ "No directory specified for -I");
1199 PL_preprocess = TRUE;
1209 PL_preambleav = newAV();
1210 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
1212 PL_Sv = newSVpv("print myconfig();",0);
1214 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
1216 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
1218 sv_catpv(PL_Sv,"\" Compile-time options:");
1220 sv_catpv(PL_Sv," DEBUGGING");
1222 # ifdef MULTIPLICITY
1223 sv_catpv(PL_Sv," MULTIPLICITY");
1225 # ifdef USE_5005THREADS
1226 sv_catpv(PL_Sv," USE_5005THREADS");
1228 # ifdef USE_ITHREADS
1229 sv_catpv(PL_Sv," USE_ITHREADS");
1231 # ifdef USE_64_BIT_INT
1232 sv_catpv(PL_Sv," USE_64_BIT_INT");
1234 # ifdef USE_64_BIT_ALL
1235 sv_catpv(PL_Sv," USE_64_BIT_ALL");
1237 # ifdef USE_LONG_DOUBLE
1238 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1240 # ifdef USE_LARGE_FILES
1241 sv_catpv(PL_Sv," USE_LARGE_FILES");
1244 sv_catpv(PL_Sv," USE_SOCKS");
1246 # ifdef PERL_IMPLICIT_CONTEXT
1247 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1249 # ifdef PERL_IMPLICIT_SYS
1250 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1252 sv_catpv(PL_Sv,"\\n\",");
1254 #if defined(LOCAL_PATCH_COUNT)
1255 if (LOCAL_PATCH_COUNT > 0) {
1257 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
1258 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1259 if (PL_localpatches[i])
1260 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
1264 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
1267 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
1269 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
1272 sv_catpv(PL_Sv, "; \
1274 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1277 push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1280 print \" \\%ENV:\\n @env\\n\" if @env; \
1281 print \" \\@INC:\\n @INC\\n\";");
1284 PL_Sv = newSVpv("config_vars(qw(",0);
1285 sv_catpv(PL_Sv, ++s);
1286 sv_catpv(PL_Sv, "))");
1289 av_push(PL_preambleav, PL_Sv);
1290 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1293 PL_doextract = TRUE;
1301 if (!*++s || isSPACE(*s)) {
1305 /* catch use of gnu style long options */
1306 if (strEQ(s, "version")) {
1310 if (strEQ(s, "help")) {
1317 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1323 #ifndef SECURE_INTERNAL_GETENV
1326 (s = PerlEnv_getenv("PERL5OPT")))
1331 if (*s == '-' && *(s+1) == 'T') {
1333 PL_taint_warn = FALSE;
1336 char *popt_copy = Nullch;
1349 if (!strchr("DIMUdmtw", *s))
1350 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1354 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1355 s = popt_copy + (s - popt);
1356 d = popt_copy + (d - popt);
1363 if( !PL_tainting ) {
1364 PL_taint_warn = TRUE;
1374 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1375 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1379 scriptname = argv[0];
1382 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1384 else if (scriptname == Nullch) {
1386 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1394 open_script(scriptname,dosearch,sv,&fdscript);
1396 validate_suid(validarg, scriptname,fdscript);
1399 #if defined(SIGCHLD) || defined(SIGCLD)
1402 # define SIGCHLD SIGCLD
1404 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1405 if (sigstate == SIG_IGN) {
1406 if (ckWARN(WARN_SIGNAL))
1407 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1408 "Can't ignore signal CHLD, forcing to default");
1409 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1415 #ifdef MACOS_TRADITIONAL
1416 if (PL_doextract || gMacPerl_AlwaysExtract) {
1421 if (cddir && PerlDir_chdir(cddir) < 0)
1422 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1426 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1427 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1428 CvUNIQUE_on(PL_compcv);
1430 PL_comppad = newAV();
1431 av_push(PL_comppad, Nullsv);
1432 PL_curpad = AvARRAY(PL_comppad);
1433 PL_comppad_name = newAV();
1434 PL_comppad_name_fill = 0;
1435 PL_min_intro_pending = 0;
1437 #ifdef USE_5005THREADS
1438 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
1439 PL_curpad[0] = (SV*)newAV();
1440 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1441 CvOWNER(PL_compcv) = 0;
1442 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1443 MUTEX_INIT(CvMUTEXP(PL_compcv));
1444 #endif /* USE_5005THREADS */
1446 comppadlist = newAV();
1447 AvREAL_off(comppadlist);
1448 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1449 av_store(comppadlist, 1, (SV*)PL_comppad);
1450 CvPADLIST(PL_compcv) = comppadlist;
1453 boot_core_UNIVERSAL();
1455 boot_core_xsutils();
1459 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
1461 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
1467 # ifdef HAS_SOCKS5_INIT
1468 socks5_init(argv[0]);
1474 init_predump_symbols();
1475 /* init_postdump_symbols not currently designed to be called */
1476 /* more than once (ENV isn't cleared first, for example) */
1477 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
1479 init_postdump_symbols(argc,argv,env);
1481 /* PL_wantutf8 is conditionally turned on by
1482 * locale.c:Perl_init_i18nl10n() if the environment
1483 * look like the user wants to use UTF-8. */
1484 if (PL_wantutf8) { /* Requires init_predump_symbols(). */
1488 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
1489 * _and_ the default open discipline. */
1490 if (PL_stdingv && (io = GvIO(PL_stdingv)) && (fp = IoIFP(io)))
1491 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1492 if (PL_defoutgv && (io = GvIO(PL_defoutgv)) && (fp = IoOFP(io)))
1493 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1494 if (PL_stderrgv && (io = GvIO(PL_stderrgv)) && (fp = IoOFP(io)))
1495 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1496 if ((sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1497 sv_setpvn(sv, ":utf8\0:utf8", 11);
1504 /* now parse the script */
1506 SETERRNO(0,SS$_NORMAL);
1508 #ifdef MACOS_TRADITIONAL
1509 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1511 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1513 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1514 MacPerl_MPWFileName(PL_origfilename));
1518 if (yyparse() || PL_error_count) {
1520 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
1522 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1527 CopLINE_set(PL_curcop, 0);
1528 PL_curstash = PL_defstash;
1529 PL_preprocess = FALSE;
1531 SvREFCNT_dec(PL_e_script);
1532 PL_e_script = Nullsv;
1536 Not sure that this is still the right place to do this now that we
1537 no longer use PL_nrs. HVDS 2001/09/09
1539 sv_setsv(get_sv("/", TRUE), PL_rs);
1545 SAVECOPFILE(PL_curcop);
1546 SAVECOPLINE(PL_curcop);
1547 gv_check(PL_defstash);
1554 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1555 dump_mstats("after compilation:");
1564 =for apidoc perl_run
1566 Tells a Perl interpreter to run. See L<perlembed>.
1577 #ifdef USE_5005THREADS
1581 oldscope = PL_scopestack_ix;
1586 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1588 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1594 cxstack_ix = -1; /* start context stack again */
1596 case 0: /* normal completion */
1597 #ifndef PERL_FLEXIBLE_EXCEPTIONS
1602 case 2: /* my_exit() */
1603 while (PL_scopestack_ix > oldscope)
1606 PL_curstash = PL_defstash;
1607 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
1608 PL_endav && !PL_minus_c)
1609 call_list(oldscope, PL_endav);
1611 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1612 dump_mstats("after execution: ");
1614 ret = STATUS_NATIVE_EXPORT;
1618 POPSTACK_TO(PL_mainstack);
1621 PerlIO_printf(Perl_error_log, "panic: restartop\n");
1631 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1633 S_vrun_body(pTHX_ va_list args)
1635 I32 oldscope = va_arg(args, I32);
1637 return run_body(oldscope);
1643 S_run_body(pTHX_ I32 oldscope)
1645 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1646 PL_sawampersand ? "Enabling" : "Omitting"));
1648 if (!PL_restartop) {
1649 DEBUG_x(dump_all());
1650 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1651 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1655 #ifdef MACOS_TRADITIONAL
1656 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
1657 (gMacPerl_ErrorFormat ? "# " : ""),
1658 MacPerl_MPWFileName(PL_origfilename));
1660 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
1664 if (PERLDB_SINGLE && PL_DBsingle)
1665 sv_setiv(PL_DBsingle, 1);
1667 call_list(oldscope, PL_initav);
1673 PL_op = PL_restartop;
1677 else if (PL_main_start) {
1678 CvDEPTH(PL_main_cv) = 1;
1679 PL_op = PL_main_start;
1689 =head1 SV Manipulation Functions
1691 =for apidoc p||get_sv
1693 Returns the SV of the specified Perl scalar. If C<create> is set and the
1694 Perl variable does not exist then it will be created. If C<create> is not
1695 set and the variable does not exist then NULL is returned.
1701 Perl_get_sv(pTHX_ const char *name, I32 create)
1704 #ifdef USE_5005THREADS
1705 if (name[1] == '\0' && !isALPHA(name[0])) {
1706 PADOFFSET tmp = find_threadsv(name);
1707 if (tmp != NOT_IN_PAD)
1708 return THREADSV(tmp);
1710 #endif /* USE_5005THREADS */
1711 gv = gv_fetchpv(name, create, SVt_PV);
1718 =head1 Array Manipulation Functions
1720 =for apidoc p||get_av
1722 Returns the AV of the specified Perl array. If C<create> is set and the
1723 Perl variable does not exist then it will be created. If C<create> is not
1724 set and the variable does not exist then NULL is returned.
1730 Perl_get_av(pTHX_ const char *name, I32 create)
1732 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1741 =head1 Hash Manipulation Functions
1743 =for apidoc p||get_hv
1745 Returns the HV of the specified Perl hash. If C<create> is set and the
1746 Perl variable does not exist then it will be created. If C<create> is not
1747 set and the variable does not exist then NULL is returned.
1753 Perl_get_hv(pTHX_ const char *name, I32 create)
1755 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1764 =head1 CV Manipulation Functions
1766 =for apidoc p||get_cv
1768 Returns the CV of the specified Perl subroutine. If C<create> is set and
1769 the Perl subroutine does not exist then it will be declared (which has the
1770 same effect as saying C<sub name;>). If C<create> is not set and the
1771 subroutine does not exist then NULL is returned.
1777 Perl_get_cv(pTHX_ const char *name, I32 create)
1779 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1780 /* XXX unsafe for threads if eval_owner isn't held */
1781 /* XXX this is probably not what they think they're getting.
1782 * It has the same effect as "sub name;", i.e. just a forward
1784 if (create && !GvCVu(gv))
1785 return newSUB(start_subparse(FALSE, 0),
1786 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1794 /* Be sure to refetch the stack pointer after calling these routines. */
1798 =head1 Callback Functions
1800 =for apidoc p||call_argv
1802 Performs a callback to the specified Perl sub. See L<perlcall>.
1808 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
1810 /* See G_* flags in cop.h */
1811 /* null terminated arg list */
1818 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1823 return call_pv(sub_name, flags);
1827 =for apidoc p||call_pv
1829 Performs a callback to the specified Perl sub. See L<perlcall>.
1835 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
1836 /* name of the subroutine */
1837 /* See G_* flags in cop.h */
1839 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
1843 =for apidoc p||call_method
1845 Performs a callback to the specified Perl method. The blessed object must
1846 be on the stack. See L<perlcall>.
1852 Perl_call_method(pTHX_ const char *methname, I32 flags)
1853 /* name of the subroutine */
1854 /* See G_* flags in cop.h */
1856 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
1859 /* May be called with any of a CV, a GV, or an SV containing the name. */
1861 =for apidoc p||call_sv
1863 Performs a callback to the Perl sub whose name is in the SV. See
1870 Perl_call_sv(pTHX_ SV *sv, I32 flags)
1871 /* See G_* flags in cop.h */
1874 LOGOP myop; /* fake syntax tree node */
1877 volatile I32 retval = 0;
1879 bool oldcatch = CATCH_GET;
1884 if (flags & G_DISCARD) {
1889 Zero(&myop, 1, LOGOP);
1890 myop.op_next = Nullop;
1891 if (!(flags & G_NOARGS))
1892 myop.op_flags |= OPf_STACKED;
1893 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1894 (flags & G_ARRAY) ? OPf_WANT_LIST :
1899 EXTEND(PL_stack_sp, 1);
1900 *++PL_stack_sp = sv;
1902 oldscope = PL_scopestack_ix;
1904 if (PERLDB_SUB && PL_curstash != PL_debstash
1905 /* Handle first BEGIN of -d. */
1906 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
1907 /* Try harder, since this may have been a sighandler, thus
1908 * curstash may be meaningless. */
1909 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
1910 && !(flags & G_NODEBUG))
1911 PL_op->op_private |= OPpENTERSUB_DB;
1913 if (flags & G_METHOD) {
1914 Zero(&method_op, 1, UNOP);
1915 method_op.op_next = PL_op;
1916 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1917 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
1918 PL_op = (OP*)&method_op;
1921 if (!(flags & G_EVAL)) {
1923 call_body((OP*)&myop, FALSE);
1924 retval = PL_stack_sp - (PL_stack_base + oldmark);
1925 CATCH_SET(oldcatch);
1928 myop.op_other = (OP*)&myop;
1930 /* we're trying to emulate pp_entertry() here */
1932 register PERL_CONTEXT *cx;
1933 I32 gimme = GIMME_V;
1938 push_return(Nullop);
1939 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
1941 PL_eval_root = PL_op; /* Only needed so that goto works right. */
1943 PL_in_eval = EVAL_INEVAL;
1944 if (flags & G_KEEPERR)
1945 PL_in_eval |= EVAL_KEEPERR;
1951 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1953 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
1960 #ifndef PERL_FLEXIBLE_EXCEPTIONS
1962 call_body((OP*)&myop, FALSE);
1964 retval = PL_stack_sp - (PL_stack_base + oldmark);
1965 if (!(flags & G_KEEPERR))
1972 /* my_exit() was called */
1973 PL_curstash = PL_defstash;
1976 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
1977 Perl_croak(aTHX_ "Callback called exit");
1982 PL_op = PL_restartop;
1986 PL_stack_sp = PL_stack_base + oldmark;
1987 if (flags & G_ARRAY)
1991 *++PL_stack_sp = &PL_sv_undef;
1996 if (PL_scopestack_ix > oldscope) {
2000 register PERL_CONTEXT *cx;
2012 if (flags & G_DISCARD) {
2013 PL_stack_sp = PL_stack_base + oldmark;
2022 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2024 S_vcall_body(pTHX_ va_list args)
2026 OP *myop = va_arg(args, OP*);
2027 int is_eval = va_arg(args, int);
2029 call_body(myop, is_eval);
2035 S_call_body(pTHX_ OP *myop, int is_eval)
2037 if (PL_op == myop) {
2039 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2041 PL_op = Perl_pp_entersub(aTHX); /* this does */
2047 /* Eval a string. The G_EVAL flag is always assumed. */
2050 =for apidoc p||eval_sv
2052 Tells Perl to C<eval> the string in the SV.
2058 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2060 /* See G_* flags in cop.h */
2063 UNOP myop; /* fake syntax tree node */
2064 volatile I32 oldmark = SP - PL_stack_base;
2065 volatile I32 retval = 0;
2071 if (flags & G_DISCARD) {
2078 Zero(PL_op, 1, UNOP);
2079 EXTEND(PL_stack_sp, 1);
2080 *++PL_stack_sp = sv;
2081 oldscope = PL_scopestack_ix;
2083 if (!(flags & G_NOARGS))
2084 myop.op_flags = OPf_STACKED;
2085 myop.op_next = Nullop;
2086 myop.op_type = OP_ENTEREVAL;
2087 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2088 (flags & G_ARRAY) ? OPf_WANT_LIST :
2090 if (flags & G_KEEPERR)
2091 myop.op_flags |= OPf_SPECIAL;
2093 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2095 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
2102 #ifndef PERL_FLEXIBLE_EXCEPTIONS
2104 call_body((OP*)&myop,TRUE);
2106 retval = PL_stack_sp - (PL_stack_base + oldmark);
2107 if (!(flags & G_KEEPERR))
2114 /* my_exit() was called */
2115 PL_curstash = PL_defstash;
2118 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2119 Perl_croak(aTHX_ "Callback called exit");
2124 PL_op = PL_restartop;
2128 PL_stack_sp = PL_stack_base + oldmark;
2129 if (flags & G_ARRAY)
2133 *++PL_stack_sp = &PL_sv_undef;
2139 if (flags & G_DISCARD) {
2140 PL_stack_sp = PL_stack_base + oldmark;
2150 =for apidoc p||eval_pv
2152 Tells Perl to C<eval> the given string and return an SV* result.
2158 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2161 SV* sv = newSVpv(p, 0);
2163 eval_sv(sv, G_SCALAR);
2170 if (croak_on_error && SvTRUE(ERRSV)) {
2172 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2178 /* Require a module. */
2181 =head1 Embedding Functions
2183 =for apidoc p||require_pv
2185 Tells Perl to C<require> the file named by the string argument. It is
2186 analogous to the Perl code C<eval "require '$file'">. It's even
2187 implemented that way; consider using Perl_load_module instead.
2192 Perl_require_pv(pTHX_ const char *pv)
2196 PUSHSTACKi(PERLSI_REQUIRE);
2198 sv = sv_newmortal();
2199 sv_setpv(sv, "require '");
2202 eval_sv(sv, G_DISCARD);
2208 Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
2212 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
2213 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2217 S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
2219 /* This message really ought to be max 23 lines.
2220 * Removed -h because the user already knows that option. Others? */
2222 static char *usage_msg[] = {
2223 "-0[octal] specify record separator (\\0, if no argument)",
2224 "-a autosplit mode with -n or -p (splits $_ into @F)",
2225 "-C enable native wide character system interfaces",
2226 "-c check syntax only (runs BEGIN and CHECK blocks)",
2227 "-d[:debugger] run program under debugger",
2228 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2229 "-e 'command' one line of program (several -e's allowed, omit programfile)",
2230 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2231 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2232 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2233 "-l[octal] enable line ending processing, specifies line terminator",
2234 "-[mM][-]module execute `use/no module...' before executing program",
2235 "-n assume 'while (<>) { ... }' loop around program",
2236 "-p assume loop like -n but print line also, like sed",
2237 "-P run program through C preprocessor before compilation",
2238 "-s enable rudimentary parsing for switches after programfile",
2239 "-S look for programfile using PATH environment variable",
2240 "-T enable tainting checks",
2241 "-t enable tainting warnings",
2242 "-u dump core after parsing program",
2243 "-U allow unsafe operations",
2244 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2245 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2246 "-w enable many useful warnings (RECOMMENDED)",
2247 "-W enable all warnings",
2248 "-X disable all warnings",
2249 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2253 char **p = usage_msg;
2255 PerlIO_printf(PerlIO_stdout(),
2256 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2259 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2262 /* This routine handles any switches that can be given during run */
2265 Perl_moreswitches(pTHX_ char *s)
2275 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2276 SvREFCNT_dec(PL_rs);
2277 if (rschar & ~((U8)~0))
2278 PL_rs = &PL_sv_undef;
2279 else if (!rschar && numlen >= 2)
2280 PL_rs = newSVpvn("", 0);
2282 char ch = (char)rschar;
2283 PL_rs = newSVpvn(&ch, 1);
2288 PL_widesyscalls = TRUE;
2294 while (*s && !isSPACE(*s)) ++s;
2296 PL_splitstr = savepv(PL_splitstr);
2309 /* The following permits -d:Mod to accepts arguments following an =
2310 in the fashion that -MSome::Mod does. */
2311 if (*s == ':' || *s == '=') {
2314 sv = newSVpv("use Devel::", 0);
2316 /* We now allow -d:Module=Foo,Bar */
2317 while(isALNUM(*s) || *s==':') ++s;
2319 sv_catpv(sv, start);
2321 sv_catpvn(sv, start, s-start);
2322 sv_catpv(sv, " split(/,/,q{");
2327 my_setenv("PERL5DB", SvPV(sv, PL_na));
2330 PL_perldb = PERLDB_ALL;
2338 if (isALPHA(s[1])) {
2339 /* if adding extra options, remember to update DEBUG_MASK */
2340 static char debopts[] = "psltocPmfrxuLHXDSTRJ";
2343 for (s++; *s && (d = strchr(debopts,*s)); s++)
2344 PL_debug |= 1 << (d - debopts);
2347 PL_debug = atoi(s+1);
2348 for (s++; isDIGIT(*s); s++) ;
2351 if (DEBUG_p_TEST_ && ckWARN_d(WARN_DEBUGGING))
2352 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2353 "-Dp not implemented on this platform\n");
2355 PL_debug |= DEBUG_TOP_FLAG;
2356 #else /* !DEBUGGING */
2357 if (ckWARN_d(WARN_DEBUGGING))
2358 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2359 "Recompile perl with -DDEBUGGING to use -D switch\n");
2360 for (s++; isALNUM(*s); s++) ;
2366 usage(PL_origargv[0]);
2370 Safefree(PL_inplace);
2371 #if defined(__CYGWIN__) /* do backup extension automagically */
2372 if (*(s+1) == '\0') {
2373 PL_inplace = savepv(".bak");
2376 #endif /* __CYGWIN__ */
2377 PL_inplace = savepv(s+1);
2379 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
2382 if (*s == '-') /* Additional switches on #! line. */
2386 case 'I': /* -I handled both here and in parse_body() */
2389 while (*s && isSPACE(*s))
2394 /* ignore trailing spaces (possibly followed by other switches) */
2396 for (e = p; *e && !isSPACE(*e); e++) ;
2400 } while (*p && *p != '-');
2401 e = savepvn(s, e-s);
2402 incpush(e, TRUE, TRUE);
2409 Perl_croak(aTHX_ "No directory specified for -I");
2415 SvREFCNT_dec(PL_ors_sv);
2420 PL_ors_sv = newSVpvn("\n",1);
2421 numlen = 3 + (*s == '0');
2422 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
2426 if (RsPARA(PL_rs)) {
2427 PL_ors_sv = newSVpvn("\n\n",2);
2430 PL_ors_sv = newSVsv(PL_rs);
2435 forbid_setid("-M"); /* XXX ? */
2438 forbid_setid("-m"); /* XXX ? */
2443 /* -M-foo == 'no foo' */
2444 if (*s == '-') { use = "no "; ++s; }
2445 sv = newSVpv(use,0);
2447 /* We allow -M'Module qw(Foo Bar)' */
2448 while(isALNUM(*s) || *s==':') ++s;
2450 sv_catpv(sv, start);
2451 if (*(start-1) == 'm') {
2453 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
2454 sv_catpv( sv, " ()");
2458 Perl_croak(aTHX_ "Module name required with -%c option",
2460 sv_catpvn(sv, start, s-start);
2461 sv_catpv(sv, " split(/,/,q{");
2467 PL_preambleav = newAV();
2468 av_push(PL_preambleav, sv);
2471 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
2483 PL_doswitches = TRUE;
2488 Perl_croak(aTHX_ "Too late for \"-t\" option");
2493 Perl_croak(aTHX_ "Too late for \"-T\" option");
2497 #ifdef MACOS_TRADITIONAL
2498 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2500 PL_do_undump = TRUE;
2509 PerlIO_printf(PerlIO_stdout(),
2510 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
2511 PL_patchlevel, ARCHNAME));
2513 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2514 PerlIO_printf(PerlIO_stdout(),
2515 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2516 PerlIO_printf(PerlIO_stdout(),
2517 Perl_form(aTHX_ " built under %s at %s %s\n",
2518 OSNAME, __DATE__, __TIME__));
2519 PerlIO_printf(PerlIO_stdout(),
2520 Perl_form(aTHX_ " OS Specific Release: %s\n",
2524 #if defined(LOCAL_PATCH_COUNT)
2525 if (LOCAL_PATCH_COUNT > 0)
2526 PerlIO_printf(PerlIO_stdout(),
2527 "\n(with %d registered patch%s, "
2528 "see perl -V for more detail)",
2529 (int)LOCAL_PATCH_COUNT,
2530 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
2533 PerlIO_printf(PerlIO_stdout(),
2534 "\n\nCopyright 1987-2002, Larry Wall\n");
2535 #ifdef MACOS_TRADITIONAL
2536 PerlIO_printf(PerlIO_stdout(),
2537 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
2538 "maintained by Chris Nandor\n");
2541 PerlIO_printf(PerlIO_stdout(),
2542 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
2545 PerlIO_printf(PerlIO_stdout(),
2546 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2547 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
2550 PerlIO_printf(PerlIO_stdout(),
2551 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2552 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
2555 PerlIO_printf(PerlIO_stdout(),
2556 "atariST series port, ++jrb bammi@cadence.com\n");
2559 PerlIO_printf(PerlIO_stdout(),
2560 "BeOS port Copyright Tom Spindler, 1997-1999\n");
2563 PerlIO_printf(PerlIO_stdout(),
2564 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2002\n");
2567 PerlIO_printf(PerlIO_stdout(),
2568 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
2571 PerlIO_printf(PerlIO_stdout(),
2572 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
2575 PerlIO_printf(PerlIO_stdout(),
2576 "VM/ESA port by Neale Ferguson, 1998-1999\n");
2579 PerlIO_printf(PerlIO_stdout(),
2580 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
2583 PerlIO_printf(PerlIO_stdout(),
2584 "MiNT port by Guido Flohr, 1997-1999\n");
2587 PerlIO_printf(PerlIO_stdout(),
2588 "EPOC port by Olaf Flebbe, 1999-2002\n");
2591 printf("WINCE port by Rainer Keuchel, 2001-2002\n");
2592 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2595 #ifdef BINARY_BUILD_NOTICE
2596 BINARY_BUILD_NOTICE;
2598 PerlIO_printf(PerlIO_stdout(),
2600 Perl may be copied only under the terms of either the Artistic License or the\n\
2601 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
2602 Complete documentation for Perl, including FAQ lists, should be found on\n\
2603 this system using `man perl' or `perldoc perl'. If you have access to the\n\
2604 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
2607 if (! (PL_dowarn & G_WARN_ALL_MASK))
2608 PL_dowarn |= G_WARN_ON;
2612 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
2613 if (!specialWARN(PL_compiling.cop_warnings))
2614 SvREFCNT_dec(PL_compiling.cop_warnings);
2615 PL_compiling.cop_warnings = pWARN_ALL ;
2619 PL_dowarn = G_WARN_ALL_OFF;
2620 if (!specialWARN(PL_compiling.cop_warnings))
2621 SvREFCNT_dec(PL_compiling.cop_warnings);
2622 PL_compiling.cop_warnings = pWARN_NONE ;
2627 if (s[1] == '-') /* Additional switches on #! line. */
2632 #if defined(WIN32) || !defined(PERL_STRICT_CR)
2638 #ifdef ALTERNATE_SHEBANG
2639 case 'S': /* OS/2 needs -S on "extproc" line. */
2647 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
2652 /* compliments of Tom Christiansen */
2654 /* unexec() can be found in the Gnu emacs distribution */
2655 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
2658 Perl_my_unexec(pTHX)
2666 prog = newSVpv(BIN_EXP, 0);
2667 sv_catpv(prog, "/perl");
2668 file = newSVpv(PL_origfilename, 0);
2669 sv_catpv(file, ".perldump");
2671 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2672 /* unexec prints msg to stderr in case of failure */
2673 PerlProc_exit(status);
2676 # include <lib$routines.h>
2677 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
2679 ABORT(); /* for use with undump */
2684 /* initialize curinterp */
2690 # define PERLVAR(var,type)
2691 # define PERLVARA(var,n,type)
2692 # if defined(PERL_IMPLICIT_CONTEXT)
2693 # if defined(USE_5005THREADS)
2694 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2695 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
2696 # else /* !USE_5005THREADS */
2697 # define PERLVARI(var,type,init) aTHX->var = init;
2698 # define PERLVARIC(var,type,init) aTHX->var = init;
2699 # endif /* USE_5005THREADS */
2701 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2702 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
2704 # include "intrpvar.h"
2705 # ifndef USE_5005THREADS
2706 # include "thrdvar.h"
2713 # define PERLVAR(var,type)
2714 # define PERLVARA(var,n,type)
2715 # define PERLVARI(var,type,init) PL_##var = init;
2716 # define PERLVARIC(var,type,init) PL_##var = init;
2717 # include "intrpvar.h"
2718 # ifndef USE_5005THREADS
2719 # include "thrdvar.h"
2730 S_init_main_stash(pTHX)
2734 PL_curstash = PL_defstash = newHV();
2735 PL_curstname = newSVpvn("main",4);
2736 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2737 SvREFCNT_dec(GvHV(gv));
2738 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
2740 HvNAME(PL_defstash) = savepv("main");
2741 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2742 GvMULTI_on(PL_incgv);
2743 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2744 GvMULTI_on(PL_hintgv);
2745 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2746 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2747 GvMULTI_on(PL_errgv);
2748 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2749 GvMULTI_on(PL_replgv);
2750 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
2751 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2752 sv_setpvn(ERRSV, "", 0);
2753 PL_curstash = PL_defstash;
2754 CopSTASH_set(&PL_compiling, PL_defstash);
2755 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
2756 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
2757 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
2758 /* We must init $/ before switches are processed. */
2759 sv_setpvn(get_sv("/", TRUE), "\n", 1);
2763 S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
2767 char *cpp_discard_flag;
2773 PL_origfilename = savepv("-e");
2776 /* if find_script() returns, it returns a malloc()-ed value */
2777 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
2779 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2780 char *s = scriptname + 8;
2781 *fdscript = atoi(s);
2785 scriptname = savepv(s + 1);
2786 Safefree(PL_origfilename);
2787 PL_origfilename = scriptname;
2792 CopFILE_free(PL_curcop);
2793 CopFILE_set(PL_curcop, PL_origfilename);
2794 if (strEQ(PL_origfilename,"-"))
2796 if (*fdscript >= 0) {
2797 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
2798 # if defined(HAS_FCNTL) && defined(F_SETFD)
2800 /* ensure close-on-exec */
2801 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2804 else if (PL_preprocess) {
2805 char *cpp_cfg = CPPSTDIN;
2806 SV *cpp = newSVpvn("",0);
2807 SV *cmd = NEWSV(0,0);
2809 if (strEQ(cpp_cfg, "cppstdin"))
2810 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
2811 sv_catpv(cpp, cpp_cfg);
2814 sv_catpvn(sv, "-I", 2);
2815 sv_catpv(sv,PRIVLIB_EXP);
2818 DEBUG_P(PerlIO_printf(Perl_debug_log,
2819 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2820 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
2822 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
2829 cpp_discard_flag = "";
2831 cpp_discard_flag = "-C";
2835 perl = os2_execname(aTHX);
2837 perl = PL_origargv[0];
2841 /* This strips off Perl comments which might interfere with
2842 the C pre-processor, including #!. #line directives are
2843 deliberately stripped to avoid confusion with Perl's version
2844 of #line. FWP played some golf with it so it will fit
2845 into VMS's 255 character buffer.
2848 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2850 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2852 Perl_sv_setpvf(aTHX_ cmd, "\
2853 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
2854 perl, quote, code, quote, scriptname, cpp,
2855 cpp_discard_flag, sv, CPPMINUS);
2857 PL_doextract = FALSE;
2858 # ifdef IAMSUID /* actually, this is caught earlier */
2859 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2861 (void)seteuid(PL_uid); /* musn't stay setuid root */
2863 # ifdef HAS_SETREUID
2864 (void)setreuid((Uid_t)-1, PL_uid);
2866 # ifdef HAS_SETRESUID
2867 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2869 PerlProc_setuid(PL_uid);
2873 if (PerlProc_geteuid() != PL_uid)
2874 Perl_croak(aTHX_ "Can't do seteuid!\n");
2876 # endif /* IAMSUID */
2878 DEBUG_P(PerlIO_printf(Perl_debug_log,
2879 "PL_preprocess: cmd=\"%s\"\n",
2882 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
2886 else if (!*scriptname) {
2887 forbid_setid("program input from stdin");
2888 PL_rsfp = PerlIO_stdin();
2891 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2892 # if defined(HAS_FCNTL) && defined(F_SETFD)
2894 /* ensure close-on-exec */
2895 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2900 # ifndef IAMSUID /* in case script is not readable before setuid */
2902 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
2903 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2906 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT,
2907 BIN_EXP, (int)PERL_REVISION,
2909 (int)PERL_SUBVERSION), PL_origargv);
2910 Perl_croak(aTHX_ "Can't do setuid\n");
2916 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2919 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
2920 CopFILE(PL_curcop), Strerror(errno));
2926 * I_SYSSTATVFS HAS_FSTATVFS
2928 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
2929 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2930 * here so that metaconfig picks them up. */
2934 S_fd_on_nosuid_fs(pTHX_ int fd)
2936 int check_okay = 0; /* able to do all the required sys/libcalls */
2937 int on_nosuid = 0; /* the fd is on a nosuid fs */
2939 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
2940 * fstatvfs() is UNIX98.
2941 * fstatfs() is 4.3 BSD.
2942 * ustat()+getmnt() is pre-4.3 BSD.
2943 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2944 * an irrelevant filesystem while trying to reach the right one.
2947 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2949 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2950 defined(HAS_FSTATVFS)
2951 # define FD_ON_NOSUID_CHECK_OKAY
2952 struct statvfs stfs;
2954 check_okay = fstatvfs(fd, &stfs) == 0;
2955 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
2956 # endif /* fstatvfs */
2958 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2959 defined(PERL_MOUNT_NOSUID) && \
2960 defined(HAS_FSTATFS) && \
2961 defined(HAS_STRUCT_STATFS) && \
2962 defined(HAS_STRUCT_STATFS_F_FLAGS)
2963 # define FD_ON_NOSUID_CHECK_OKAY
2966 check_okay = fstatfs(fd, &stfs) == 0;
2967 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
2968 # endif /* fstatfs */
2970 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2971 defined(PERL_MOUNT_NOSUID) && \
2972 defined(HAS_FSTAT) && \
2973 defined(HAS_USTAT) && \
2974 defined(HAS_GETMNT) && \
2975 defined(HAS_STRUCT_FS_DATA) && \
2977 # define FD_ON_NOSUID_CHECK_OKAY
2980 if (fstat(fd, &fdst) == 0) {
2982 if (ustat(fdst.st_dev, &us) == 0) {
2984 /* NOSTAT_ONE here because we're not examining fields which
2985 * vary between that case and STAT_ONE. */
2986 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
2987 size_t cmplen = sizeof(us.f_fname);
2988 if (sizeof(fsd.fd_req.path) < cmplen)
2989 cmplen = sizeof(fsd.fd_req.path);
2990 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2991 fdst.st_dev == fsd.fd_req.dev) {
2993 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2999 # endif /* fstat+ustat+getmnt */
3001 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3002 defined(HAS_GETMNTENT) && \
3003 defined(HAS_HASMNTOPT) && \
3004 defined(MNTOPT_NOSUID)
3005 # define FD_ON_NOSUID_CHECK_OKAY
3006 FILE *mtab = fopen("/etc/mtab", "r");
3007 struct mntent *entry;
3010 if (mtab && (fstat(fd, &stb) == 0)) {
3011 while (entry = getmntent(mtab)) {
3012 if (stat(entry->mnt_dir, &fsb) == 0
3013 && fsb.st_dev == stb.st_dev)
3015 /* found the filesystem */
3017 if (hasmntopt(entry, MNTOPT_NOSUID))
3020 } /* A single fs may well fail its stat(). */
3025 # endif /* getmntent+hasmntopt */
3028 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
3031 #endif /* IAMSUID */
3034 S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
3040 /* do we need to emulate setuid on scripts? */
3042 /* This code is for those BSD systems that have setuid #! scripts disabled
3043 * in the kernel because of a security problem. Merely defining DOSUID
3044 * in perl will not fix that problem, but if you have disabled setuid
3045 * scripts in the kernel, this will attempt to emulate setuid and setgid
3046 * on scripts that have those now-otherwise-useless bits set. The setuid
3047 * root version must be called suidperl or sperlN.NNN. If regular perl
3048 * discovers that it has opened a setuid script, it calls suidperl with
3049 * the same argv that it had. If suidperl finds that the script it has
3050 * just opened is NOT setuid root, it sets the effective uid back to the
3051 * uid. We don't just make perl setuid root because that loses the
3052 * effective uid we had before invoking perl, if it was different from the
3055 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3056 * be defined in suidperl only. suidperl must be setuid root. The
3057 * Configure script will set this up for you if you want it.
3063 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3064 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3065 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3070 #ifndef HAS_SETREUID
3071 /* On this access check to make sure the directories are readable,
3072 * there is actually a small window that the user could use to make
3073 * filename point to an accessible directory. So there is a faint
3074 * chance that someone could execute a setuid script down in a
3075 * non-accessible directory. I don't know what to do about that.
3076 * But I don't think it's too important. The manual lies when
3077 * it says access() is useful in setuid programs.
3079 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
3080 Perl_croak(aTHX_ "Permission denied");
3082 /* If we can swap euid and uid, then we can determine access rights
3083 * with a simple stat of the file, and then compare device and
3084 * inode to make sure we did stat() on the same file we opened.
3085 * Then we just have to make sure he or she can execute it.
3092 setreuid(PL_euid,PL_uid) < 0
3095 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
3098 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3099 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
3100 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
3101 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
3102 #if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
3103 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
3104 Perl_croak(aTHX_ "Permission denied");
3106 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3107 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3108 (void)PerlIO_close(PL_rsfp);
3109 Perl_croak(aTHX_ "Permission denied\n");
3113 setreuid(PL_uid,PL_euid) < 0
3115 # if defined(HAS_SETRESUID)
3116 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
3119 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3120 Perl_croak(aTHX_ "Can't reswap uid and euid");
3121 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3122 Perl_croak(aTHX_ "Permission denied\n");
3124 #endif /* HAS_SETREUID */
3125 #endif /* IAMSUID */
3127 if (!S_ISREG(PL_statbuf.st_mode))
3128 Perl_croak(aTHX_ "Permission denied");
3129 if (PL_statbuf.st_mode & S_IWOTH)
3130 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3131 PL_doswitches = FALSE; /* -s is insecure in suid */
3132 CopLINE_inc(PL_curcop);
3133 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3134 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
3135 Perl_croak(aTHX_ "No #! line");
3136 s = SvPV(PL_linestr,n_a)+2;
3138 while (!isSPACE(*s)) s++;
3139 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
3140 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3141 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
3142 Perl_croak(aTHX_ "Not a perl script");
3143 while (*s == ' ' || *s == '\t') s++;
3145 * #! arg must be what we saw above. They can invoke it by
3146 * mentioning suidperl explicitly, but they may not add any strange
3147 * arguments beyond what #! says if they do invoke suidperl that way.
3149 len = strlen(validarg);
3150 if (strEQ(validarg," PHOOEY ") ||
3151 strnNE(s,validarg,len) || !isSPACE(s[len]))
3152 Perl_croak(aTHX_ "Args must match #! line");
3155 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3156 PL_euid == PL_statbuf.st_uid)
3158 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3159 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3160 #endif /* IAMSUID */
3162 if (PL_euid) { /* oops, we're not the setuid root perl */
3163 (void)PerlIO_close(PL_rsfp);
3166 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
3167 (int)PERL_REVISION, (int)PERL_VERSION,
3168 (int)PERL_SUBVERSION), PL_origargv);
3170 Perl_croak(aTHX_ "Can't do setuid\n");
3173 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
3175 (void)setegid(PL_statbuf.st_gid);
3178 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
3180 #ifdef HAS_SETRESGID
3181 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
3183 PerlProc_setgid(PL_statbuf.st_gid);
3187 if (PerlProc_getegid() != PL_statbuf.st_gid)
3188 Perl_croak(aTHX_ "Can't do setegid!\n");
3190 if (PL_statbuf.st_mode & S_ISUID) {
3191 if (PL_statbuf.st_uid != PL_euid)
3193 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
3196 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
3198 #ifdef HAS_SETRESUID
3199 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
3201 PerlProc_setuid(PL_statbuf.st_uid);
3205 if (PerlProc_geteuid() != PL_statbuf.st_uid)
3206 Perl_croak(aTHX_ "Can't do seteuid!\n");
3208 else if (PL_uid) { /* oops, mustn't run as root */
3210 (void)seteuid((Uid_t)PL_uid);
3213 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
3215 #ifdef HAS_SETRESUID
3216 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
3218 PerlProc_setuid((Uid_t)PL_uid);
3222 if (PerlProc_geteuid() != PL_uid)
3223 Perl_croak(aTHX_ "Can't do seteuid!\n");
3226 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
3227 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
3230 else if (PL_preprocess)
3231 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
3232 else if (fdscript >= 0)
3233 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
3235 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
3237 /* We absolutely must clear out any saved ids here, so we */
3238 /* exec the real perl, substituting fd script for scriptname. */
3239 /* (We pass script name as "subdir" of fd, which perl will grok.) */
3240 PerlIO_rewind(PL_rsfp);
3241 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3242 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3243 if (!PL_origargv[which])
3244 Perl_croak(aTHX_ "Permission denied");
3245 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
3246 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
3247 #if defined(HAS_FCNTL) && defined(F_SETFD)
3248 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
3250 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
3251 (int)PERL_REVISION, (int)PERL_VERSION,
3252 (int)PERL_SUBVERSION), PL_origargv);/* try again */
3253 Perl_croak(aTHX_ "Can't do setuid\n");
3254 #endif /* IAMSUID */
3256 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3257 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
3258 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3259 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3261 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3264 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3265 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3266 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3267 /* not set-id, must be wrapped */
3273 S_find_beginning(pTHX)
3275 register char *s, *s2;
3277 /* skip forward in input to the real script? */
3280 #ifdef MACOS_TRADITIONAL
3281 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
3283 while (PL_doextract || gMacPerl_AlwaysExtract) {
3284 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3285 if (!gMacPerl_AlwaysExtract)
3286 Perl_croak(aTHX_ "No Perl script found in input\n");
3288 if (PL_doextract) /* require explicit override ? */
3289 if (!OverrideExtract(PL_origfilename))
3290 Perl_croak(aTHX_ "User aborted script\n");
3292 PL_doextract = FALSE;
3294 /* Pater peccavi, file does not have #! */
3295 PerlIO_rewind(PL_rsfp);
3300 while (PL_doextract) {
3301 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
3302 Perl_croak(aTHX_ "No Perl script found in input\n");
3305 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3306 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3307 PL_doextract = FALSE;
3308 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3310 while (*s == ' ' || *s == '\t') s++;
3312 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3313 if (strnEQ(s2-4,"perl",4))
3315 while ((s = moreswitches(s)))
3318 #ifdef MACOS_TRADITIONAL
3329 PL_uid = PerlProc_getuid();
3330 PL_euid = PerlProc_geteuid();
3331 PL_gid = PerlProc_getgid();
3332 PL_egid = PerlProc_getegid();
3334 PL_uid |= PL_gid << 16;
3335 PL_euid |= PL_egid << 16;
3337 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3341 S_forbid_setid(pTHX_ char *s)
3343 if (PL_euid != PL_uid)
3344 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3345 if (PL_egid != PL_gid)
3346 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
3350 Perl_init_debugger(pTHX)
3352 HV *ostash = PL_curstash;
3354 PL_curstash = PL_debstash;
3355 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3356 AvREAL_off(PL_dbargs);
3357 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3358 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3359 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
3360 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3361 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
3362 sv_setiv(PL_DBsingle, 0);
3363 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
3364 sv_setiv(PL_DBtrace, 0);
3365 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
3366 sv_setiv(PL_DBsignal, 0);
3367 PL_curstash = ostash;
3370 #ifndef STRESS_REALLOC
3371 #define REASONABLE(size) (size)
3373 #define REASONABLE(size) (1) /* unreasonable */
3377 Perl_init_stacks(pTHX)
3379 /* start with 128-item stack and 8K cxstack */
3380 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3381 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3382 PL_curstackinfo->si_type = PERLSI_MAIN;
3383 PL_curstack = PL_curstackinfo->si_stack;
3384 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3386 PL_stack_base = AvARRAY(PL_curstack);
3387 PL_stack_sp = PL_stack_base;
3388 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3390 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3393 PL_tmps_max = REASONABLE(128);
3395 New(54,PL_markstack,REASONABLE(32),I32);
3396 PL_markstack_ptr = PL_markstack;
3397 PL_markstack_max = PL_markstack + REASONABLE(32);
3401 New(54,PL_scopestack,REASONABLE(32),I32);
3402 PL_scopestack_ix = 0;
3403 PL_scopestack_max = REASONABLE(32);
3405 New(54,PL_savestack,REASONABLE(128),ANY);
3406 PL_savestack_ix = 0;
3407 PL_savestack_max = REASONABLE(128);
3409 New(54,PL_retstack,REASONABLE(16),OP*);
3411 PL_retstack_max = REASONABLE(16);
3419 while (PL_curstackinfo->si_next)
3420 PL_curstackinfo = PL_curstackinfo->si_next;
3421 while (PL_curstackinfo) {
3422 PERL_SI *p = PL_curstackinfo->si_prev;
3423 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3424 Safefree(PL_curstackinfo->si_cxstack);
3425 Safefree(PL_curstackinfo);
3426 PL_curstackinfo = p;
3428 Safefree(PL_tmps_stack);
3429 Safefree(PL_markstack);
3430 Safefree(PL_scopestack);
3431 Safefree(PL_savestack);
3432 Safefree(PL_retstack);
3441 lex_start(PL_linestr);
3443 PL_subname = newSVpvn("main",4);
3447 S_init_predump_symbols(pTHX)
3452 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3453 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3454 GvMULTI_on(PL_stdingv);
3455 io = GvIOp(PL_stdingv);
3456 IoTYPE(io) = IoTYPE_RDONLY;
3457 IoIFP(io) = PerlIO_stdin();
3458 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
3460 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
3462 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
3465 IoTYPE(io) = IoTYPE_WRONLY;
3466 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3468 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
3470 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
3472 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3473 GvMULTI_on(PL_stderrgv);
3474 io = GvIOp(PL_stderrgv);
3475 IoTYPE(io) = IoTYPE_WRONLY;
3476 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3477 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
3479 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
3481 PL_statname = NEWSV(66,0); /* last filename we did stat on */
3484 Safefree(PL_osname);
3485 PL_osname = savepv(OSNAME);
3489 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3492 argc--,argv++; /* skip name of script */
3493 if (PL_doswitches) {
3494 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3497 if (argv[0][1] == '-' && !argv[0][2]) {
3501 if ((s = strchr(argv[0], '='))) {
3503 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
3506 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
3509 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3510 GvMULTI_on(PL_argvgv);
3511 (void)gv_AVadd(PL_argvgv);
3512 av_clear(GvAVn(PL_argvgv));
3513 for (; argc > 0; argc--,argv++) {
3514 SV *sv = newSVpv(argv[0],0);
3515 av_push(GvAVn(PL_argvgv),sv);
3516 if (PL_widesyscalls)
3517 (void)sv_utf8_decode(sv);
3522 #ifdef HAS_PROCSELFEXE
3523 /* This is a function so that we don't hold on to MAXPATHLEN
3524 bytes of stack longer than necessary
3527 S_procself_val(pTHX_ SV *sv, char *arg0)
3529 char buf[MAXPATHLEN];
3530 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
3531 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
3532 returning the text "unknown" from the readlink rather than the path
3533 to the executable (or returning an error from the readlink). Any valid
3534 path has a '/' in it somewhere, so use that to validate the result.
3535 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
3537 if (len > 0 && memchr(buf, '/', len)) {
3538 sv_setpvn(sv,buf,len);
3544 #endif /* HAS_PROCSELFEXE */
3547 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3553 PL_toptarget = NEWSV(0,0);
3554 sv_upgrade(PL_toptarget, SVt_PVFM);
3555 sv_setpvn(PL_toptarget, "", 0);
3556 PL_bodytarget = NEWSV(0,0);
3557 sv_upgrade(PL_bodytarget, SVt_PVFM);
3558 sv_setpvn(PL_bodytarget, "", 0);
3559 PL_formtarget = PL_bodytarget;
3563 init_argv_symbols(argc,argv);
3565 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
3566 #ifdef MACOS_TRADITIONAL
3567 /* $0 is not majick on a Mac */
3568 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3570 sv_setpv(GvSV(tmpgv),PL_origfilename);
3571 magicname("0", "0", 1);
3574 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))) {/* $^X */
3575 #ifdef HAS_PROCSELFEXE
3576 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
3579 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
3581 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
3585 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
3587 GvMULTI_on(PL_envgv);
3588 hv = GvHVn(PL_envgv);
3589 hv_magic(hv, Nullgv, PERL_MAGIC_env);
3590 #ifdef USE_ENVIRON_ARRAY
3591 /* Note that if the supplied env parameter is actually a copy
3592 of the global environ then it may now point to free'd memory
3593 if the environment has been modified since. To avoid this
3594 problem we treat env==NULL as meaning 'use the default'
3599 # ifdef USE_ITHREADS
3600 && PL_curinterp == aTHX
3604 environ[0] = Nullch;
3607 for (; *env; env++) {
3608 if (!(s = strchr(*env,'=')))
3615 sv = newSVpv(s+1, 0);
3616 (void)hv_store(hv, *env, s - *env, sv, 0);
3620 #endif /* USE_ENVIRON_ARRAY */
3623 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
3624 SvREADONLY_off(GvSV(tmpgv));
3625 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
3626 SvREADONLY_on(GvSV(tmpgv));
3629 /* touch @F array to prevent spurious warnings 20020415 MJD */
3631 (void) get_av("main::F", TRUE | GV_ADDMULTI);
3633 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
3634 (void) get_av("main::-", TRUE | GV_ADDMULTI);
3635 (void) get_av("main::+", TRUE | GV_ADDMULTI);
3639 S_init_perllib(pTHX)
3644 s = PerlEnv_getenv("PERL5LIB");
3646 incpush(s, TRUE, TRUE);
3648 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE);
3650 /* Treat PERL5?LIB as a possible search list logical name -- the
3651 * "natural" VMS idiom for a Unix path string. We allow each
3652 * element to be a set of |-separated directories for compatibility.
3656 if (my_trnlnm("PERL5LIB",buf,0))
3657 do { incpush(buf,TRUE,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
3659 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE);
3663 /* Use the ~-expanded versions of APPLLIB (undocumented),
3664 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
3667 incpush(APPLLIB_EXP, TRUE, TRUE);
3671 incpush(ARCHLIB_EXP, FALSE, FALSE);
3673 #ifdef MACOS_TRADITIONAL
3676 SV * privdir = NEWSV(55, 0);
3677 char * macperl = PerlEnv_getenv("MACPERL");
3682 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
3683 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
3684 incpush(SvPVX(privdir), TRUE, FALSE);
3685 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
3686 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
3687 incpush(SvPVX(privdir), TRUE, FALSE);
3689 SvREFCNT_dec(privdir);
3692 incpush(":", FALSE, FALSE);
3695 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
3698 incpush(PRIVLIB_EXP, TRUE, FALSE);
3700 incpush(PRIVLIB_EXP, FALSE, FALSE);
3704 /* sitearch is always relative to sitelib on Windows for
3705 * DLL-based path intuition to work correctly */
3706 # if !defined(WIN32)
3707 incpush(SITEARCH_EXP, FALSE, FALSE);
3713 incpush(SITELIB_EXP, TRUE, FALSE); /* this picks up sitearch as well */
3715 incpush(SITELIB_EXP, FALSE, FALSE);
3719 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
3720 incpush(SITELIB_STEM, FALSE, TRUE);
3723 #ifdef PERL_VENDORARCH_EXP
3724 /* vendorarch is always relative to vendorlib on Windows for
3725 * DLL-based path intuition to work correctly */
3726 # if !defined(WIN32)
3727 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE);
3731 #ifdef PERL_VENDORLIB_EXP
3733 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE); /* this picks up vendorarch as well */
3735 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE);
3739 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
3740 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE);
3743 #ifdef PERL_OTHERLIBDIRS
3744 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE);
3748 incpush(".", FALSE, FALSE);
3749 #endif /* MACOS_TRADITIONAL */
3752 #if defined(DOSISH) || defined(EPOC)
3753 # define PERLLIB_SEP ';'
3756 # define PERLLIB_SEP '|'
3758 # if defined(MACOS_TRADITIONAL)
3759 # define PERLLIB_SEP ','
3761 # define PERLLIB_SEP ':'
3765 #ifndef PERLLIB_MANGLE
3766 # define PERLLIB_MANGLE(s,n) (s)
3770 S_incpush(pTHX_ char *p, int addsubdirs, int addoldvers)
3772 SV *subdir = Nullsv;
3777 if (addsubdirs || addoldvers) {
3778 subdir = sv_newmortal();
3781 /* Break at all separators */
3783 SV *libdir = NEWSV(55,0);
3786 /* skip any consecutive separators */
3787 while ( *p == PERLLIB_SEP ) {
3788 /* Uncomment the next line for PATH semantics */
3789 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
3793 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
3794 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
3799 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
3800 p = Nullch; /* break out */
3802 #ifdef MACOS_TRADITIONAL
3803 if (!strchr(SvPVX(libdir), ':')) {
3806 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
3808 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
3809 sv_catpv(libdir, ":");
3813 * BEFORE pushing libdir onto @INC we may first push version- and
3814 * archname-specific sub-directories.
3816 if (addsubdirs || addoldvers) {
3817 #ifdef PERL_INC_VERSION_LIST
3818 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
3819 const char *incverlist[] = { PERL_INC_VERSION_LIST };
3820 const char **incver;
3827 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
3829 while (unix[len-1] == '/') len--; /* Cosmetic */
3830 sv_usepvn(libdir,unix,len);
3833 PerlIO_printf(Perl_error_log,
3834 "Failed to unixify @INC element \"%s\"\n",
3838 #ifdef MACOS_TRADITIONAL
3839 #define PERL_AV_SUFFIX_FMT ""
3840 #define PERL_ARCH_FMT "%s:"
3841 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
3843 #define PERL_AV_SUFFIX_FMT "/"
3844 #define PERL_ARCH_FMT "/%s"
3845 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
3847 /* .../version/archname if -d .../version/archname */
3848 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
3850 (int)PERL_REVISION, (int)PERL_VERSION,
3851 (int)PERL_SUBVERSION, ARCHNAME);
3852 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
3853 S_ISDIR(tmpstatbuf.st_mode))
3854 av_push(GvAVn(PL_incgv), newSVsv(subdir));
3856 /* .../version if -d .../version */
3857 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
3858 (int)PERL_REVISION, (int)PERL_VERSION,
3859 (int)PERL_SUBVERSION);
3860 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
3861 S_ISDIR(tmpstatbuf.st_mode))
3862 av_push(GvAVn(PL_incgv), newSVsv(subdir));
3864 /* .../archname if -d .../archname */
3865 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
3866 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
3867 S_ISDIR(tmpstatbuf.st_mode))
3868 av_push(GvAVn(PL_incgv), newSVsv(subdir));
3871 #ifdef PERL_INC_VERSION_LIST
3873 for (incver = incverlist; *incver; incver++) {
3874 /* .../xxx if -d .../xxx */
3875 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
3876 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
3877 S_ISDIR(tmpstatbuf.st_mode))
3878 av_push(GvAVn(PL_incgv), newSVsv(subdir));
3884 /* finally push this lib directory on the end of @INC */
3885 av_push(GvAVn(PL_incgv), libdir);
3889 #ifdef USE_5005THREADS
3890 STATIC struct perl_thread *
3891 S_init_main_thread(pTHX)
3893 #if !defined(PERL_IMPLICIT_CONTEXT)
3894 struct perl_thread *thr;
3898 Newz(53, thr, 1, struct perl_thread);
3899 PL_curcop = &PL_compiling;
3900 thr->interp = PERL_GET_INTERP;
3901 thr->cvcache = newHV();
3902 thr->threadsv = newAV();
3903 /* thr->threadsvp is set when find_threadsv is called */
3904 thr->specific = newAV();
3905 thr->flags = THRf_R_JOINABLE;
3906 MUTEX_INIT(&thr->mutex);
3907 /* Handcraft thrsv similarly to mess_sv */
3908 New(53, PL_thrsv, 1, SV);
3909 Newz(53, xpv, 1, XPV);
3910 SvFLAGS(PL_thrsv) = SVt_PV;
3911 SvANY(PL_thrsv) = (void*)xpv;
3912 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
3913 SvPVX(PL_thrsv) = (char*)thr;
3914 SvCUR_set(PL_thrsv, sizeof(thr));
3915 SvLEN_set(PL_thrsv, sizeof(thr));
3916 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
3917 thr->oursv = PL_thrsv;
3918 PL_chopset = " \n-";
3921 MUTEX_LOCK(&PL_threads_mutex);
3927 MUTEX_UNLOCK(&PL_threads_mutex);
3929 #ifdef HAVE_THREAD_INTERN
3930 Perl_init_thread_intern(thr);
3933 #ifdef SET_THREAD_SELF
3934 SET_THREAD_SELF(thr);
3936 thr->self = pthread_self();
3937 #endif /* SET_THREAD_SELF */
3941 * These must come after the thread self setting
3942 * because sv_setpvn does SvTAINT and the taint
3943 * fields thread selfness being set.
3945 PL_toptarget = NEWSV(0,0);
3946 sv_upgrade(PL_toptarget, SVt_PVFM);
3947 sv_setpvn(PL_toptarget, "", 0);
3948 PL_bodytarget = NEWSV(0,0);
3949 sv_upgrade(PL_bodytarget, SVt_PVFM);
3950 sv_setpvn(PL_bodytarget, "", 0);
3951 PL_formtarget = PL_bodytarget;
3952 thr->errsv = newSVpvn("", 0);
3953 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
3956 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
3957 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
3958 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
3959 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
3960 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
3961 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
3963 PL_reginterp_cnt = 0;
3967 #endif /* USE_5005THREADS */
3970 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
3973 line_t oldline = CopLINE(PL_curcop);
3979 while (AvFILL(paramList) >= 0) {
3980 cv = (CV*)av_shift(paramList);
3981 if (PL_savebegin && (paramList == PL_beginav)) {
3982 /* save PL_beginav for compiler */
3983 if (! PL_beginav_save)
3984 PL_beginav_save = newAV();
3985 av_push(PL_beginav_save, (SV*)cv);
3989 #ifdef PERL_FLEXIBLE_EXCEPTIONS
3990 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_list_body), cv);
3996 #ifndef PERL_FLEXIBLE_EXCEPTIONS
4000 (void)SvPV(atsv, len);
4003 PL_curcop = &PL_compiling;
4004 CopLINE_set(PL_curcop, oldline);
4005 if (paramList == PL_beginav)
4006 sv_catpv(atsv, "BEGIN failed--compilation aborted");
4008 Perl_sv_catpvf(aTHX_ atsv,
4009 "%s failed--call queue aborted",
4010 paramList == PL_checkav ? "CHECK"
4011 : paramList == PL_initav ? "INIT"
4013 while (PL_scopestack_ix > oldscope)
4016 Perl_croak(aTHX_ "%s", SvPVx(atsv, n_a));
4023 /* my_exit() was called */
4024 while (PL_scopestack_ix > oldscope)
4027 PL_curstash = PL_defstash;
4028 PL_curcop = &PL_compiling;
4029 CopLINE_set(PL_curcop, oldline);
4031 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4032 if (paramList == PL_beginav)
4033 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4035 Perl_croak(aTHX_ "%s failed--call queue aborted",
4036 paramList == PL_checkav ? "CHECK"
4037 : paramList == PL_initav ? "INIT"
4044 PL_curcop = &PL_compiling;
4045 CopLINE_set(PL_curcop, oldline);
4048 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4056 #ifdef PERL_FLEXIBLE_EXCEPTIONS
4058 S_vcall_list_body(pTHX_ va_list args)
4060 CV *cv = va_arg(args, CV*);
4061 return call_list_body(cv);
4066 S_call_list_body(pTHX_ CV *cv)
4068 PUSHMARK(PL_stack_sp);
4069 call_sv((SV*)cv, G_EVAL|G_DISCARD);
4074 Perl_my_exit(pTHX_ U32 status)
4076 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
4077 thr, (unsigned long) status));
4086 STATUS_NATIVE_SET(status);
4093 Perl_my_failure_exit(pTHX)
4096 if (vaxc$errno & 1) {
4097 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
4098 STATUS_NATIVE_SET(44);
4101 if (!vaxc$errno && errno) /* unlikely */
4102 STATUS_NATIVE_SET(44);
4104 STATUS_NATIVE_SET(vaxc$errno);
4109 STATUS_POSIX_SET(errno);
4111 exitstatus = STATUS_POSIX >> 8;
4112 if (exitstatus & 255)
4113 STATUS_POSIX_SET(exitstatus);
4115 STATUS_POSIX_SET(255);
4122 S_my_exit_jump(pTHX)
4124 register PERL_CONTEXT *cx;
4129 SvREFCNT_dec(PL_e_script);
4130 PL_e_script = Nullsv;
4133 POPSTACK_TO(PL_mainstack);
4134 if (cxstack_ix >= 0) {
4137 POPBLOCK(cx,PL_curpm);
4145 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4148 p = SvPVX(PL_e_script);
4149 nl = strchr(p, '\n');
4150 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4152 filter_del(read_e_script);
4155 sv_catpvn(buf_sv, p, nl-p);
4156 sv_chop(PL_e_script, nl);