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plug memory leak in perl_destruct() by cleaning out PL_debug_pad
[perl5.git] / perl.c
CommitLineData
a0d0e21e
LW
1/* perl.c
2 *
be3c0a43 3 * Copyright (c) 1987-2002 Larry Wall
a687059c 4 *
352d5a3a
LW
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.
a687059c 7 *
8d063cd8
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8 */
9
a0d0e21e
LW
10/*
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
12 */
45d8adaa 13
378cc40b 14#include "EXTERN.h"
864dbfa3 15#define PERL_IN_PERL_C
378cc40b 16#include "perl.h"
e3321bb0 17#include "patchlevel.h" /* for local_patches */
378cc40b 18
df5cef82 19/* XXX If this causes problems, set i_unistd=undef in the hint file. */
a0d0e21e
LW
20#ifdef I_UNISTD
21#include <unistd.h>
22#endif
a0d0e21e 23
7114a2d2 24#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
20ce7b12 25char *getenv (char *); /* Usually in <stdlib.h> */
54310121
PP
26#endif
27
acfe0abc 28static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
0cb96387 29
a687059c
LW
30#ifdef IAMSUID
31#ifndef DOSUID
32#define DOSUID
33#endif
34#endif
378cc40b 35
a687059c
LW
36#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
37#ifdef DOSUID
38#undef DOSUID
39#endif
40#endif
8d063cd8 41
4d1ff10f 42#if defined(USE_5005THREADS)
06d86050
GS
43# define INIT_TLS_AND_INTERP \
44 STMT_START { \
45 if (!PL_curinterp) { \
46 PERL_SET_INTERP(my_perl); \
47 INIT_THREADS; \
48 ALLOC_THREAD_KEY; \
49 } \
50 } STMT_END
51#else
52# if defined(USE_ITHREADS)
53# define INIT_TLS_AND_INTERP \
54 STMT_START { \
55 if (!PL_curinterp) { \
56 PERL_SET_INTERP(my_perl); \
57 INIT_THREADS; \
58 ALLOC_THREAD_KEY; \
534825c4
GS
59 PERL_SET_THX(my_perl); \
60 OP_REFCNT_INIT; \
61 } \
62 else { \
63 PERL_SET_THX(my_perl); \
06d86050 64 } \
06d86050
GS
65 } STMT_END
66# else
67# define INIT_TLS_AND_INTERP \
68 STMT_START { \
69 if (!PL_curinterp) { \
70 PERL_SET_INTERP(my_perl); \
71 } \
72 PERL_SET_THX(my_perl); \
73 } STMT_END
74# endif
75#endif
76
32e30700
GS
77#ifdef PERL_IMPLICIT_SYS
78PerlInterpreter *
7766f137
GS
79perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
80 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
32e30700
GS
81 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
82 struct IPerlDir* ipD, struct IPerlSock* ipS,
83 struct IPerlProc* ipP)
84{
85 PerlInterpreter *my_perl;
32e30700
GS
86 /* New() needs interpreter, so call malloc() instead */
87 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 88 INIT_TLS_AND_INTERP;
32e30700
GS
89 Zero(my_perl, 1, PerlInterpreter);
90 PL_Mem = ipM;
7766f137
GS
91 PL_MemShared = ipMS;
92 PL_MemParse = ipMP;
32e30700
GS
93 PL_Env = ipE;
94 PL_StdIO = ipStd;
95 PL_LIO = ipLIO;
96 PL_Dir = ipD;
97 PL_Sock = ipS;
98 PL_Proc = ipP;
7766f137 99
32e30700
GS
100 return my_perl;
101}
102#else
954c1994
GS
103
104/*
ccfc67b7
JH
105=head1 Embedding Functions
106
954c1994
GS
107=for apidoc perl_alloc
108
109Allocates a new Perl interpreter. See L<perlembed>.
110
111=cut
112*/
113
93a17b20 114PerlInterpreter *
cea2e8a9 115perl_alloc(void)
79072805 116{
cea2e8a9 117 PerlInterpreter *my_perl;
35d7cf2c
JH
118#ifdef USE_5005THREADS
119 dTHX;
120#endif
79072805 121
54aff467 122 /* New() needs interpreter, so call malloc() instead */
e8ee3774 123 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 124
06d86050 125 INIT_TLS_AND_INTERP;
dedcbb81 126 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 127 return my_perl;
79072805 128}
32e30700 129#endif /* PERL_IMPLICIT_SYS */
79072805 130
954c1994
GS
131/*
132=for apidoc perl_construct
133
134Initializes a new Perl interpreter. See L<perlembed>.
135
136=cut
137*/
138
79072805 139void
0cb96387 140perl_construct(pTHXx)
79072805 141{
4d1ff10f 142#ifdef USE_5005THREADS
a863c7d1 143#ifndef FAKE_THREADS
e1f15930 144 struct perl_thread *thr = NULL;
a863c7d1 145#endif /* FAKE_THREADS */
4d1ff10f 146#endif /* USE_5005THREADS */
ba869deb 147
8990e307 148#ifdef MULTIPLICITY
54aff467 149 init_interp();
ac27b0f5 150 PL_perl_destruct_level = 1;
54aff467
GS
151#else
152 if (PL_perl_destruct_level > 0)
153 init_interp();
154#endif
155
33f46ff6 156 /* Init the real globals (and main thread)? */
3280af22 157 if (!PL_linestr) {
4d1ff10f 158#ifdef USE_5005THREADS
533c011a 159 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB
160 /*
161 * Safe to use basic SV functions from now on (though
162 * not things like mortals or tainting yet).
163 */
533c011a
NIS
164 MUTEX_INIT(&PL_eval_mutex);
165 COND_INIT(&PL_eval_cond);
166 MUTEX_INIT(&PL_threads_mutex);
167 COND_INIT(&PL_nthreads_cond);
ba869deb 168# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 169 MUTEX_INIT(&PL_svref_mutex);
ba869deb 170# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 171
5ff3f7a4 172 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS
173 MUTEX_INIT(&PL_sv_lock_mutex);
174 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 175
199100c8 176 thr = init_main_thread();
4d1ff10f 177#endif /* USE_5005THREADS */
11343788 178
14dd3ad8 179#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 180 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 181#endif
312caa8e 182
2aea9f8a
GS
183 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
184
3280af22
NIS
185 PL_linestr = NEWSV(65,79);
186 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 187
3280af22 188 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP
189 /* set read-only and try to insure than we wont see REFCNT==0
190 very often */
191
3280af22
NIS
192 SvREADONLY_on(&PL_sv_undef);
193 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 194
3280af22
NIS
195 sv_setpv(&PL_sv_no,PL_No);
196 SvNV(&PL_sv_no);
197 SvREADONLY_on(&PL_sv_no);
198 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 199
3280af22
NIS
200 sv_setpv(&PL_sv_yes,PL_Yes);
201 SvNV(&PL_sv_yes);
202 SvREADONLY_on(&PL_sv_yes);
203 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 204 }
79072805 205
cea2e8a9 206 PL_sighandlerp = Perl_sighandler;
3280af22 207 PL_pidstatus = newHV();
79072805
LW
208 }
209
8bfdd7d9 210 PL_rs = newSVpvn("\n", 1);
dc92893f 211
cea2e8a9 212 init_stacks();
79072805 213
748a9306 214 init_ids();
3280af22 215 PL_lex_state = LEX_NOTPARSING;
a5f75d66 216
312caa8e 217 JMPENV_BOOTSTRAP;
f86702cc
PP
218 STATUS_ALL_SUCCESS;
219
0672f40e 220 init_i18nl10n(1);
36477c24 221 SET_NUMERIC_STANDARD();
0b5b802d 222
a7cb1f99
GS
223 {
224 U8 *s;
225 PL_patchlevel = NEWSV(0,4);
155aba94 226 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 227 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 228 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 229 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS
230 /* Build version strings using "native" characters */
231 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
232 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
233 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS
234 *s = '\0';
235 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
236 SvPOK_on(PL_patchlevel);
237 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
238 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 239#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 240 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 241#endif
a7cb1f99
GS
242 ;
243 SvNOK_on(PL_patchlevel); /* dual valued */
244 SvUTF8_on(PL_patchlevel);
245 SvREADONLY_on(PL_patchlevel);
246 }
79072805 247
ab821d7f 248#if defined(LOCAL_PATCH_COUNT)
3280af22 249 PL_localpatches = local_patches; /* For possible -v */
ab821d7f
PP
250#endif
251
52853b95
GS
252#ifdef HAVE_INTERP_INTERN
253 sys_intern_init();
254#endif
255
3a1ee7e8 256 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 257
3280af22
NIS
258 PL_fdpid = newAV(); /* for remembering popen pids by fd */
259 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 260 PL_errors = newSVpvn("",0);
48c6b404 261 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
1f483ca1
JH
262 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
263 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
1fcf4c12 264#ifdef USE_ITHREADS
13137afc
AB
265 PL_regex_padav = newAV();
266 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
267 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 268#endif
e5dd39fc 269#ifdef USE_REENTRANT_API
59bd0823 270 Perl_reentrant_init(aTHX);
e5dd39fc 271#endif
3d47000e
AB
272
273 /* Note that strtab is a rather special HV. Assumptions are made
274 about not iterating on it, and not adding tie magic to it.
275 It is properly deallocated in perl_destruct() */
276 PL_strtab = newHV();
277
278#ifdef USE_5005THREADS
279 MUTEX_INIT(&PL_strtab_mutex);
280#endif
281 HvSHAREKEYS_off(PL_strtab); /* mandatory */
282 hv_ksplit(PL_strtab, 512);
283
0631ea03
AB
284#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
285 _dyld_lookup_and_bind
286 ("__environ", (unsigned long *) &environ_pointer, NULL);
287#endif /* environ */
288
289#ifdef USE_ENVIRON_ARRAY
290 PL_origenviron = environ;
291#endif
292
8990e307 293 ENTER;
79072805
LW
294}
295
954c1994 296/*
62375a60
NIS
297=for apidoc nothreadhook
298
299Stub that provides thread hook for perl_destruct when there are
300no threads.
301
302=cut
303*/
304
305int
4e9e3734 306Perl_nothreadhook(pTHX)
62375a60
NIS
307{
308 return 0;
309}
310
311/*
954c1994
GS
312=for apidoc perl_destruct
313
314Shuts down a Perl interpreter. See L<perlembed>.
315
316=cut
317*/
318
31d77e54 319int
0cb96387 320perl_destruct(pTHXx)
79072805 321{
7c474504 322 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 323 HV *hv;
4d1ff10f 324#ifdef USE_5005THREADS
33f46ff6 325 Thread t;
cea2e8a9 326 dTHX;
4d1ff10f 327#endif /* USE_5005THREADS */
8990e307 328
7766f137
GS
329 /* wait for all pseudo-forked children to finish */
330 PERL_WAIT_FOR_CHILDREN;
331
4d1ff10f 332#ifdef USE_5005THREADS
0f15f207 333#ifndef FAKE_THREADS
8023c3ce
MB
334 /* Pass 1 on any remaining threads: detach joinables, join zombies */
335 retry_cleanup:
533c011a 336 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 337 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 338 "perl_destruct: waiting for %d threads...\n",
533c011a 339 PL_nthreads - 1));
33f46ff6 340 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB
341 MUTEX_LOCK(&t->mutex);
342 switch (ThrSTATE(t)) {
343 AV *av;
c7848ba1 344 case THRf_ZOMBIE:
bf49b057 345 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 346 "perl_destruct: joining zombie %p\n", t));
605e5515
MB
347 ThrSETSTATE(t, THRf_DEAD);
348 MUTEX_UNLOCK(&t->mutex);
533c011a 349 PL_nthreads--;
8023c3ce
MB
350 /*
351 * The SvREFCNT_dec below may take a long time (e.g. av
352 * may contain an object scalar whose destructor gets
353 * called) so we have to unlock threads_mutex and start
354 * all over again.
355 */
533c011a 356 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 357 JOIN(t, &av);
605e5515 358 SvREFCNT_dec((SV*)av);
bf49b057 359 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 360 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 361 goto retry_cleanup;
c7848ba1 362 case THRf_R_JOINABLE:
bf49b057 363 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
364 "perl_destruct: detaching thread %p\n", t));
365 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 366 /*
c7848ba1
MB
367 * We unlock threads_mutex and t->mutex in the opposite order
368 * from which we locked them just so that DETACH won't
369 * deadlock if it panics. It's only a breach of good style
370 * not a bug since they are unlocks not locks.
371 */
533c011a 372 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB
373 DETACH(t);
374 MUTEX_UNLOCK(&t->mutex);
8023c3ce 375 goto retry_cleanup;
c7848ba1 376 default:
bf49b057 377 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
378 "perl_destruct: ignoring %p (state %u)\n",
379 t, ThrSTATE(t)));
380 MUTEX_UNLOCK(&t->mutex);
c7848ba1 381 /* fall through and out */
33f46ff6
MB
382 }
383 }
8023c3ce
MB
384 /* We leave the above "Pass 1" loop with threads_mutex still locked */
385
386 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 387 while (PL_nthreads > 1)
11343788 388 {
bf49b057 389 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 390 "perl_destruct: final wait for %d threads\n",
533c011a
NIS
391 PL_nthreads - 1));
392 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB
393 }
394 /* At this point, we're the last thread */
533c011a 395 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 396 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS
397 MUTEX_DESTROY(&PL_threads_mutex);
398 COND_DESTROY(&PL_nthreads_cond);
b57a092c 399 PL_nthreads--;
0f15f207 400#endif /* !defined(FAKE_THREADS) */
4d1ff10f 401#endif /* USE_5005THREADS */
11343788 402
3280af22 403 destruct_level = PL_perl_destruct_level;
4633a7c4
LW
404#ifdef DEBUGGING
405 {
406 char *s;
155aba94 407 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc
PP
408 int i = atoi(s);
409 if (destruct_level < i)
410 destruct_level = i;
411 }
4633a7c4
LW
412 }
413#endif
414
31d77e54
AB
415
416 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB
417 dJMPENV;
418 int x = 0;
419
420 JMPENV_PUSH(x);
421 if (PL_endav && !PL_minus_c)
422 call_list(PL_scopestack_ix, PL_endav);
423 JMPENV_POP;
26f423df 424 }
f3faeb53 425 LEAVE;
a0d0e21e
LW
426 FREETMPS;
427
62375a60
NIS
428 if (CALL_FPTR(PL_threadhook)(aTHX)) {
429 /* Threads hook has vetoed further cleanup */
430 return STATUS_NATIVE_EXPORT;;
431 }
432
ff0cee69
PP
433 /* We must account for everything. */
434
435 /* Destroy the main CV and syntax tree */
3280af22
NIS
436 if (PL_main_root) {
437 PL_curpad = AvARRAY(PL_comppad);
438 op_free(PL_main_root);
439 PL_main_root = Nullop;
a0d0e21e 440 }
3280af22
NIS
441 PL_curcop = &PL_compiling;
442 PL_main_start = Nullop;
443 SvREFCNT_dec(PL_main_cv);
444 PL_main_cv = Nullcv;
24d3c518 445 PL_dirty = TRUE;
ff0cee69 446
13621cfb
NIS
447 /* Tell PerlIO we are about to tear things apart in case
448 we have layers which are using resources that should
449 be cleaned up now.
450 */
451
452 PerlIO_destruct(aTHX);
453
3280af22 454 if (PL_sv_objcount) {
a0d0e21e
LW
455 /*
456 * Try to destruct global references. We do this first so that the
457 * destructors and destructees still exist. Some sv's might remain.
458 * Non-referenced objects are on their own.
459 */
a0d0e21e 460 sv_clean_objs();
8990e307
LW
461 }
462
5cd24f17 463 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
464 SvREFCNT_dec(PL_warnhook);
465 PL_warnhook = Nullsv;
466 SvREFCNT_dec(PL_diehook);
467 PL_diehook = Nullsv;
5cd24f17 468
4b556e6c 469 /* call exit list functions */
3280af22 470 while (PL_exitlistlen-- > 0)
acfe0abc 471 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 472
3280af22 473 Safefree(PL_exitlist);
4b556e6c 474
a0d0e21e 475 if (destruct_level == 0){
8990e307 476
a0d0e21e 477 DEBUG_P(debprofdump());
ac27b0f5 478
56a2bab7
NIS
479#if defined(PERLIO_LAYERS)
480 /* No more IO - including error messages ! */
481 PerlIO_cleanup(aTHX);
482#endif
483
a0d0e21e 484 /* The exit() function will do everything that needs doing. */
31d77e54 485 return STATUS_NATIVE_EXPORT;;
a0d0e21e 486 }
5dd60ef7 487
551a8b83 488 /* jettison our possibly duplicated environment */
4b647fb0
DM
489 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
490 * so we certainly shouldn't free it here
491 */
492#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
551a8b83
JH
493 if (environ != PL_origenviron) {
494 I32 i;
495
496 for (i = 0; environ[i]; i++)
4b420006 497 safesysfree(environ[i]);
0631ea03 498
4b420006
JH
499 /* Must use safesysfree() when working with environ. */
500 safesysfree(environ);
551a8b83
JH
501
502 environ = PL_origenviron;
503 }
504#endif
505
5f8cb046
DM
506#ifdef USE_ITHREADS
507 /* the syntax tree is shared between clones
508 * so op_free(PL_main_root) only ReREFCNT_dec's
509 * REGEXPs in the parent interpreter
510 * we need to manually ReREFCNT_dec for the clones
511 */
512 {
513 I32 i = AvFILLp(PL_regex_padav) + 1;
514 SV **ary = AvARRAY(PL_regex_padav);
515
516 while (i) {
35061a7e 517 SV *resv = ary[--i];
ba89bb6e 518 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM
519
520 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 521 /* this is PL_reg_curpm, already freed
35061a7e
DM
522 * flag is set in regexec.c:S_regtry
523 */
524 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 525 }
1cc8b4c5
AB
526 else if(SvREPADTMP(resv)) {
527 SvREPADTMP_off(resv);
528 }
35061a7e 529 else {
5f8cb046
DM
530 ReREFCNT_dec(re);
531 }
532 }
533 }
534 SvREFCNT_dec(PL_regex_padav);
535 PL_regex_padav = Nullav;
536 PL_regex_pad = NULL;
537#endif
538
5f05dabc
PP
539 /* loosen bonds of global variables */
540
3280af22
NIS
541 if(PL_rsfp) {
542 (void)PerlIO_close(PL_rsfp);
543 PL_rsfp = Nullfp;
8ebc5c01
PP
544 }
545
546 /* Filters for program text */
3280af22
NIS
547 SvREFCNT_dec(PL_rsfp_filters);
548 PL_rsfp_filters = Nullav;
8ebc5c01
PP
549
550 /* switches */
3280af22
NIS
551 PL_preprocess = FALSE;
552 PL_minus_n = FALSE;
553 PL_minus_p = FALSE;
554 PL_minus_l = FALSE;
555 PL_minus_a = FALSE;
556 PL_minus_F = FALSE;
557 PL_doswitches = FALSE;
599cee73 558 PL_dowarn = G_WARN_OFF;
3280af22
NIS
559 PL_doextract = FALSE;
560 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
561 PL_unsafe = FALSE;
562
563 Safefree(PL_inplace);
564 PL_inplace = Nullch;
a7cb1f99 565 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
566
567 if (PL_e_script) {
568 SvREFCNT_dec(PL_e_script);
569 PL_e_script = Nullsv;
8ebc5c01
PP
570 }
571
bc0a45ed
DM
572 while (--PL_origargc >= 0) {
573 Safefree(PL_origargv[PL_origargc]);
574 }
575 Safefree(PL_origargv);
576
8ebc5c01
PP
577 /* magical thingies */
578
7889fe52
NIS
579 SvREFCNT_dec(PL_ofs_sv); /* $, */
580 PL_ofs_sv = Nullsv;
5f05dabc 581
7889fe52
NIS
582 SvREFCNT_dec(PL_ors_sv); /* $\ */
583 PL_ors_sv = Nullsv;
8ebc5c01 584
3280af22
NIS
585 SvREFCNT_dec(PL_rs); /* $/ */
586 PL_rs = Nullsv;
dc92893f 587
d33b2eba
GS
588 PL_multiline = 0; /* $* */
589 Safefree(PL_osname); /* $^O */
590 PL_osname = Nullch;
5f05dabc 591
3280af22
NIS
592 SvREFCNT_dec(PL_statname);
593 PL_statname = Nullsv;
594 PL_statgv = Nullgv;
5f05dabc 595
8ebc5c01
PP
596 /* defgv, aka *_ should be taken care of elsewhere */
597
8ebc5c01 598 /* clean up after study() */
3280af22
NIS
599 SvREFCNT_dec(PL_lastscream);
600 PL_lastscream = Nullsv;
601 Safefree(PL_screamfirst);
602 PL_screamfirst = 0;
603 Safefree(PL_screamnext);
604 PL_screamnext = 0;
8ebc5c01 605
7d5ea4e7
GS
606 /* float buffer */
607 Safefree(PL_efloatbuf);
608 PL_efloatbuf = Nullch;
609 PL_efloatsize = 0;
610
8ebc5c01 611 /* startup and shutdown function lists */
3280af22 612 SvREFCNT_dec(PL_beginav);
5a837c8f 613 SvREFCNT_dec(PL_beginav_save);
3280af22 614 SvREFCNT_dec(PL_endav);
7d30b5c4 615 SvREFCNT_dec(PL_checkav);
3280af22
NIS
616 SvREFCNT_dec(PL_initav);
617 PL_beginav = Nullav;
5a837c8f 618 PL_beginav_save = Nullav;
3280af22 619 PL_endav = Nullav;
7d30b5c4 620 PL_checkav = Nullav;
3280af22 621 PL_initav = Nullav;
5618dfe8 622
8ebc5c01 623 /* shortcuts just get cleared */
3280af22 624 PL_envgv = Nullgv;
3280af22
NIS
625 PL_incgv = Nullgv;
626 PL_hintgv = Nullgv;
627 PL_errgv = Nullgv;
628 PL_argvgv = Nullgv;
629 PL_argvoutgv = Nullgv;
630 PL_stdingv = Nullgv;
bf49b057 631 PL_stderrgv = Nullgv;
3280af22
NIS
632 PL_last_in_gv = Nullgv;
633 PL_replgv = Nullgv;
5c831c24 634 PL_debstash = Nullhv;
8ebc5c01
PP
635
636 /* reset so print() ends up where we expect */
637 setdefout(Nullgv);
5c831c24 638
7a1c5554
GS
639 SvREFCNT_dec(PL_argvout_stack);
640 PL_argvout_stack = Nullav;
8ebc5c01 641
5c831c24
GS
642 SvREFCNT_dec(PL_modglobal);
643 PL_modglobal = Nullhv;
644 SvREFCNT_dec(PL_preambleav);
645 PL_preambleav = Nullav;
646 SvREFCNT_dec(PL_subname);
647 PL_subname = Nullsv;
648 SvREFCNT_dec(PL_linestr);
649 PL_linestr = Nullsv;
650 SvREFCNT_dec(PL_pidstatus);
651 PL_pidstatus = Nullhv;
652 SvREFCNT_dec(PL_toptarget);
653 PL_toptarget = Nullsv;
654 SvREFCNT_dec(PL_bodytarget);
655 PL_bodytarget = Nullsv;
656 PL_formtarget = Nullsv;
657
d33b2eba 658 /* free locale stuff */
b9582b6a 659#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
660 Safefree(PL_collation_name);
661 PL_collation_name = Nullch;
b9582b6a 662#endif
d33b2eba 663
b9582b6a 664#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
665 Safefree(PL_numeric_name);
666 PL_numeric_name = Nullch;
a453c169 667 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 668#endif
d33b2eba 669
5c831c24
GS
670 /* clear utf8 character classes */
671 SvREFCNT_dec(PL_utf8_alnum);
672 SvREFCNT_dec(PL_utf8_alnumc);
673 SvREFCNT_dec(PL_utf8_ascii);
674 SvREFCNT_dec(PL_utf8_alpha);
675 SvREFCNT_dec(PL_utf8_space);
676 SvREFCNT_dec(PL_utf8_cntrl);
677 SvREFCNT_dec(PL_utf8_graph);
678 SvREFCNT_dec(PL_utf8_digit);
679 SvREFCNT_dec(PL_utf8_upper);
680 SvREFCNT_dec(PL_utf8_lower);
681 SvREFCNT_dec(PL_utf8_print);
682 SvREFCNT_dec(PL_utf8_punct);
683 SvREFCNT_dec(PL_utf8_xdigit);
684 SvREFCNT_dec(PL_utf8_mark);
685 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 686 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 687 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 688 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH
689 SvREFCNT_dec(PL_utf8_idstart);
690 SvREFCNT_dec(PL_utf8_idcont);
5c831c24
GS
691 PL_utf8_alnum = Nullsv;
692 PL_utf8_alnumc = Nullsv;
693 PL_utf8_ascii = Nullsv;
694 PL_utf8_alpha = Nullsv;
695 PL_utf8_space = Nullsv;
696 PL_utf8_cntrl = Nullsv;
697 PL_utf8_graph = Nullsv;
698 PL_utf8_digit = Nullsv;
699 PL_utf8_upper = Nullsv;
700 PL_utf8_lower = Nullsv;
701 PL_utf8_print = Nullsv;
702 PL_utf8_punct = Nullsv;
703 PL_utf8_xdigit = Nullsv;
704 PL_utf8_mark = Nullsv;
705 PL_utf8_toupper = Nullsv;
706 PL_utf8_totitle = Nullsv;
707 PL_utf8_tolower = Nullsv;
b4e400f9 708 PL_utf8_tofold = Nullsv;
82686b01
JH
709 PL_utf8_idstart = Nullsv;
710 PL_utf8_idcont = Nullsv;
5c831c24 711
971a9dd3
GS
712 if (!specialWARN(PL_compiling.cop_warnings))
713 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 714 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
715 if (!specialCopIO(PL_compiling.cop_io))
716 SvREFCNT_dec(PL_compiling.cop_io);
717 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS
718 CopFILE_free(&PL_compiling);
719 CopSTASH_free(&PL_compiling);
5c831c24 720
a0d0e21e 721 /* Prepare to destruct main symbol table. */
5f05dabc 722
3280af22
NIS
723 hv = PL_defstash;
724 PL_defstash = 0;
a0d0e21e 725 SvREFCNT_dec(hv);
5c831c24
GS
726 SvREFCNT_dec(PL_curstname);
727 PL_curstname = Nullsv;
a0d0e21e 728
5a844595
GS
729 /* clear queued errors */
730 SvREFCNT_dec(PL_errors);
731 PL_errors = Nullsv;
732
a0d0e21e 733 FREETMPS;
0453d815 734 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 735 if (PL_scopestack_ix != 0)
9014280d 736 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 737 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
738 (long)PL_scopestack_ix);
739 if (PL_savestack_ix != 0)
9014280d 740 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 741 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
742 (long)PL_savestack_ix);
743 if (PL_tmps_floor != -1)
9014280d 744 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 745 (long)PL_tmps_floor + 1);
a0d0e21e 746 if (cxstack_ix != -1)
9014280d 747 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 748 (long)cxstack_ix + 1);
a0d0e21e 749 }
8990e307
LW
750
751 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 752 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 753 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
754
755 /* the 2 is for PL_fdpid and PL_strtab */
756 while (PL_sv_count > 2 && sv_clean_all())
757 ;
758
d33b2eba
GS
759 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
760 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
761 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
762 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 763
d4777f27
GS
764 AvREAL_off(PL_fdpid); /* no surviving entries */
765 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
766 PL_fdpid = Nullav;
767
6c644e78
GS
768#ifdef HAVE_INTERP_INTERN
769 sys_intern_clear();
770#endif
771
6e72f9df
PP
772 /* Destruct the global string table. */
773 {
774 /* Yell and reset the HeVAL() slots that are still holding refcounts,
775 * so that sv_free() won't fail on them.
776 */
777 I32 riter;
778 I32 max;
779 HE *hent;
780 HE **array;
781
782 riter = 0;
3280af22
NIS
783 max = HvMAX(PL_strtab);
784 array = HvARRAY(PL_strtab);
6e72f9df
PP
785 hent = array[0];
786 for (;;) {
0453d815 787 if (hent && ckWARN_d(WARN_INTERNAL)) {
9014280d 788 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 789 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
790 HeVAL(hent) - Nullsv, HeKEY(hent));
791 HeVAL(hent) = Nullsv;
792 hent = HeNEXT(hent);
793 }
794 if (!hent) {
795 if (++riter > max)
796 break;
797 hent = array[riter];
798 }
799 }
800 }
3280af22 801 SvREFCNT_dec(PL_strtab);
6e72f9df 802
e652bb2f 803#ifdef USE_ITHREADS
a0739874
DM
804 /* free the pointer table used for cloning */
805 ptr_table_free(PL_ptr_table);
53186e96 806#endif
a0739874 807
d33b2eba
GS
808 /* free special SVs */
809
810 SvREFCNT(&PL_sv_yes) = 0;
811 sv_clear(&PL_sv_yes);
812 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 813 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
814
815 SvREFCNT(&PL_sv_no) = 0;
816 sv_clear(&PL_sv_no);
817 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 818 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS
819
820 SvREFCNT(&PL_sv_undef) = 0;
821 SvREADONLY_off(&PL_sv_undef);
d33b2eba 822
9f375a43
DM
823 {
824 int i;
825 for (i=0; i<=2; i++) {
826 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
827 sv_clear(PERL_DEBUG_PAD(i));
828 SvANY(PERL_DEBUG_PAD(i)) = NULL;
829 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
830 }
831 }
832
0453d815 833 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 834 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 835
56a2bab7 836#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
837 /* No more IO - including error messages ! */
838 PerlIO_cleanup(aTHX);
839#endif
840
3280af22 841 Safefree(PL_origfilename);
3280af22 842 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ
843 if (PL_reg_curpm)
844 Safefree(PL_reg_curpm);
82ba1be6 845 Safefree(PL_reg_poscache);
3280af22
NIS
846 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
847 Safefree(PL_op_mask);
cf36064f
GS
848 Safefree(PL_psig_ptr);
849 Safefree(PL_psig_name);
2c2666fc 850 Safefree(PL_bitcount);
ce08f86c 851 Safefree(PL_psig_pend);
6e72f9df 852 nuke_stacks();
3280af22 853 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 854
a0d0e21e 855 DEBUG_P(debprofdump());
4d1ff10f 856#ifdef USE_5005THREADS
5f08fbcd 857 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS
858 MUTEX_DESTROY(&PL_sv_mutex);
859 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 860 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 861 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 862 COND_DESTROY(&PL_eval_cond);
11d617a5
GS
863#ifdef EMULATE_ATOMIC_REFCOUNTS
864 MUTEX_DESTROY(&PL_svref_mutex);
865#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 866
8023c3ce 867 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS
868 Safefree(SvPVX(PL_thrsv));
869 Safefree(SvANY(PL_thrsv));
870 Safefree(PL_thrsv);
871 PL_thrsv = Nullsv;
4d1ff10f 872#endif /* USE_5005THREADS */
d33b2eba 873
e5dd39fc 874#ifdef USE_REENTRANT_API
10bc17b6 875 Perl_reentrant_free(aTHX);
e5dd39fc
AB
876#endif
877
612f20c3
GS
878 sv_free_arenas();
879
fc36a67e
PP
880 /* As the absolutely last thing, free the non-arena SV for mess() */
881
3280af22 882 if (PL_mess_sv) {
9c63abab
GS
883 /* it could have accumulated taint magic */
884 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
885 MAGIC* mg;
886 MAGIC* moremagic;
887 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
888 moremagic = mg->mg_moremagic;
14befaf4
DM
889 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
890 && mg->mg_len >= 0)
9c63abab
GS
891 Safefree(mg->mg_ptr);
892 Safefree(mg);
893 }
894 }
fc36a67e 895 /* we know that type >= SVt_PV */
155aba94 896 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS
897 Safefree(SvPVX(PL_mess_sv));
898 Safefree(SvANY(PL_mess_sv));
899 Safefree(PL_mess_sv);
900 PL_mess_sv = Nullsv;
fc36a67e 901 }
31d77e54 902 return STATUS_NATIVE_EXPORT;
79072805
LW
903}
904
954c1994
GS
905/*
906=for apidoc perl_free
907
908Releases a Perl interpreter. See L<perlembed>.
909
910=cut
911*/
912
79072805 913void
0cb96387 914perl_free(pTHXx)
79072805 915{
acfe0abc 916#if defined(WIN32) || defined(NETWARE)
ce3e5b80 917# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
918# ifdef NETWARE
919 void *host = nw_internal_host;
920# else
921 void *host = w32_internal_host;
922# endif
ce3e5b80 923 PerlMem_free(aTHXx);
acfe0abc
GS
924# ifdef NETWARE
925 nw5_delete_internal_host(host);
926# else
927 win32_delete_internal_host(host);
928# endif
1c0ca838
GS
929# else
930 PerlMem_free(aTHXx);
931# endif
acfe0abc
GS
932#else
933 PerlMem_free(aTHXx);
76e3520e 934#endif
79072805
LW
935}
936
4b556e6c 937void
864dbfa3 938Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 939{
3280af22
NIS
940 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
941 PL_exitlist[PL_exitlistlen].fn = fn;
942 PL_exitlist[PL_exitlistlen].ptr = ptr;
943 ++PL_exitlistlen;
4b556e6c
JD
944}
945
954c1994
GS
946/*
947=for apidoc perl_parse
948
949Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
950
951=cut
952*/
953
79072805 954int
0cb96387 955perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 956{
6224f72b 957 I32 oldscope;
6224f72b 958 int ret;
db36c5a1 959 dJMPENV;
4d1ff10f 960#ifdef USE_5005THREADS
cea2e8a9
GS
961 dTHX;
962#endif
8d063cd8 963
a687059c
LW
964#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
965#ifdef IAMSUID
966#undef IAMSUID
cea2e8a9 967 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW
968setuid perl scripts securely.\n");
969#endif
970#endif
971
3280af22 972 PL_origargc = argc;
bc0a45ed
DM
973 {
974 /* we copy rather than point to argv
975 * since perl_clone will copy and perl_destruct
3a1ee7e8 976 * has no way of knowing if we've made a copy or
bc0a45ed
DM
977 * just point to argv
978 */
979 int i = PL_origargc;
980 New(0, PL_origargv, i+1, char*);
981 PL_origargv[i] = '\0';
982 while (i-- > 0) {
983 PL_origargv[i] = savepv(argv[i]);
984 }
985 }
986
0631ea03 987
a0d0e21e 988
3280af22 989 if (PL_do_undump) {
a0d0e21e
LW
990
991 /* Come here if running an undumped a.out. */
992
3280af22
NIS
993 PL_origfilename = savepv(argv[0]);
994 PL_do_undump = FALSE;
a0d0e21e 995 cxstack_ix = -1; /* start label stack again */
748a9306 996 init_ids();
a0d0e21e
LW
997 init_postdump_symbols(argc,argv,env);
998 return 0;
999 }
1000
3280af22
NIS
1001 if (PL_main_root) {
1002 PL_curpad = AvARRAY(PL_comppad);
1003 op_free(PL_main_root);
1004 PL_main_root = Nullop;
ff0cee69 1005 }
3280af22
NIS
1006 PL_main_start = Nullop;
1007 SvREFCNT_dec(PL_main_cv);
1008 PL_main_cv = Nullcv;
79072805 1009
3280af22
NIS
1010 time(&PL_basetime);
1011 oldscope = PL_scopestack_ix;
599cee73 1012 PL_dowarn = G_WARN_OFF;
f86702cc 1013
14dd3ad8
GS
1014#ifdef PERL_FLEXIBLE_EXCEPTIONS
1015 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
1016#else
1017 JMPENV_PUSH(ret);
1018#endif
6224f72b 1019 switch (ret) {
312caa8e 1020 case 0:
14dd3ad8
GS
1021#ifndef PERL_FLEXIBLE_EXCEPTIONS
1022 parse_body(env,xsinit);
1023#endif
7d30b5c4
GS
1024 if (PL_checkav)
1025 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1026 ret = 0;
1027 break;
6224f72b
GS
1028 case 1:
1029 STATUS_ALL_FAILURE;
1030 /* FALL THROUGH */
1031 case 2:
1032 /* my_exit() was called */
3280af22 1033 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1034 LEAVE;
1035 FREETMPS;
3280af22 1036 PL_curstash = PL_defstash;
7d30b5c4
GS
1037 if (PL_checkav)
1038 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1039 ret = STATUS_NATIVE_EXPORT;
1040 break;
6224f72b 1041 case 3:
bf49b057 1042 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1043 ret = 1;
1044 break;
6224f72b 1045 }
14dd3ad8
GS
1046 JMPENV_POP;
1047 return ret;
1048}
1049
1050#ifdef PERL_FLEXIBLE_EXCEPTIONS
1051STATIC void *
1052S_vparse_body(pTHX_ va_list args)
1053{
1054 char **env = va_arg(args, char**);
1055 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1056
1057 return parse_body(env, xsinit);
312caa8e 1058}
14dd3ad8 1059#endif
312caa8e
CS
1060
1061STATIC void *
14dd3ad8 1062S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1063{
312caa8e
CS
1064 int argc = PL_origargc;
1065 char **argv = PL_origargv;
312caa8e
CS
1066 char *scriptname = NULL;
1067 int fdscript = -1;
1068 VOL bool dosearch = FALSE;
1069 char *validarg = "";
1070 AV* comppadlist;
1071 register SV *sv;
1072 register char *s;
cf756827 1073 char *cddir = Nullch;
312caa8e 1074
3280af22 1075 sv_setpvn(PL_linestr,"",0);
79cb57f6 1076 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1077 SAVEFREESV(sv);
1078 init_main_stash();
54310121 1079
6224f72b
GS
1080 for (argc--,argv++; argc > 0; argc--,argv++) {
1081 if (argv[0][0] != '-' || !argv[0][1])
1082 break;
1083#ifdef DOSUID
1084 if (*validarg)
1085 validarg = " PHOOEY ";
1086 else
1087 validarg = argv[0];
13281fa4 1088#endif
6224f72b
GS
1089 s = argv[0]+1;
1090 reswitch:
1091 switch (*s) {
729a02f2
GS
1092 case 'C':
1093#ifdef WIN32
c0932edc 1094 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS
1095 /* FALL THROUGH */
1096#endif
1d5472a9
GS
1097#ifndef PERL_STRICT_CR
1098 case '\r':
1099#endif
6224f72b
GS
1100 case ' ':
1101 case '0':
1102 case 'F':
1103 case 'a':
1104 case 'c':
1105 case 'd':
1106 case 'D':
1107 case 'h':
1108 case 'i':
1109 case 'l':
1110 case 'M':
1111 case 'm':
1112 case 'n':
1113 case 'p':
1114 case 's':
1115 case 'u':
1116 case 'U':
1117 case 'v':
599cee73
PM
1118 case 'W':
1119 case 'X':
6224f72b 1120 case 'w':
155aba94 1121 if ((s = moreswitches(s)))
6224f72b
GS
1122 goto reswitch;
1123 break;
33b78306 1124
1dbad523 1125 case 't':
317ea90d
MS
1126 if( !PL_tainting ) {
1127 PL_taint_warn = TRUE;
1128 PL_tainting = TRUE;
1129 }
1130 s++;
1131 goto reswitch;
6224f72b 1132 case 'T':
3280af22 1133 PL_tainting = TRUE;
317ea90d 1134 PL_taint_warn = FALSE;
6224f72b
GS
1135 s++;
1136 goto reswitch;
f86702cc 1137
6224f72b 1138 case 'e':
bf4acbe4
GS
1139#ifdef MACOS_TRADITIONAL
1140 /* ignore -e for Dev:Pseudo argument */
1141 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1142 break;
bf4acbe4 1143#endif
3280af22 1144 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1145 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1146 if (!PL_e_script) {
79cb57f6 1147 PL_e_script = newSVpvn("",0);
0cb96387 1148 filter_add(read_e_script, NULL);
6224f72b
GS
1149 }
1150 if (*++s)
3280af22 1151 sv_catpv(PL_e_script, s);
6224f72b 1152 else if (argv[1]) {
3280af22 1153 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1154 argc--,argv++;
1155 }
1156 else
cea2e8a9 1157 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1158 sv_catpv(PL_e_script, "\n");
6224f72b 1159 break;
afe37c7d 1160
6224f72b
GS
1161 case 'I': /* -I handled both here and in moreswitches() */
1162 forbid_setid("-I");
1163 if (!*++s && (s=argv[1]) != Nullch) {
1164 argc--,argv++;
1165 }
6224f72b 1166 if (s && *s) {
0df16ed7
GS
1167 char *p;
1168 STRLEN len = strlen(s);
1169 p = savepvn(s, len);
9c8a64f0 1170 incpush(p, TRUE, TRUE);
0df16ed7
GS
1171 sv_catpvn(sv, "-I", 2);
1172 sv_catpvn(sv, p, len);
1173 sv_catpvn(sv, " ", 1);
6224f72b 1174 Safefree(p);
0df16ed7
GS
1175 }
1176 else
a67e862a 1177 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1178 break;
1179 case 'P':
1180 forbid_setid("-P");
3280af22 1181 PL_preprocess = TRUE;
6224f72b
GS
1182 s++;
1183 goto reswitch;
1184 case 'S':
1185 forbid_setid("-S");
1186 dosearch = TRUE;
1187 s++;
1188 goto reswitch;
1189 case 'V':
3280af22
NIS
1190 if (!PL_preambleav)
1191 PL_preambleav = newAV();
1192 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1193 if (*++s != ':') {
3280af22 1194 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1195#ifdef VMS
6b88bc9c 1196 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1197#else
3280af22 1198 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1199#endif
3280af22 1200 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1201# ifdef DEBUGGING
3280af22 1202 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1203# endif
6224f72b 1204# ifdef MULTIPLICITY
8f872242 1205 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1206# endif
4d1ff10f
AB
1207# ifdef USE_5005THREADS
1208 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1209# endif
ac5e8965
JH
1210# ifdef USE_ITHREADS
1211 sv_catpv(PL_Sv," USE_ITHREADS");
1212# endif
10cc9d2a
JH
1213# ifdef USE_64_BIT_INT
1214 sv_catpv(PL_Sv," USE_64_BIT_INT");
1215# endif
1216# ifdef USE_64_BIT_ALL
1217 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1218# endif
1219# ifdef USE_LONG_DOUBLE
1220 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1221# endif
53430762
JH
1222# ifdef USE_LARGE_FILES
1223 sv_catpv(PL_Sv," USE_LARGE_FILES");
1224# endif
ac5e8965
JH
1225# ifdef USE_SOCKS
1226 sv_catpv(PL_Sv," USE_SOCKS");
1227# endif
b363f7ed
GS
1228# ifdef PERL_IMPLICIT_CONTEXT
1229 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1230# endif
1231# ifdef PERL_IMPLICIT_SYS
1232 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1233# endif
3280af22 1234 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1235
6224f72b
GS
1236#if defined(LOCAL_PATCH_COUNT)
1237 if (LOCAL_PATCH_COUNT > 0) {
1238 int i;
3280af22 1239 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1240 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1241 if (PL_localpatches[i])
cea2e8a9 1242 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS
1243 }
1244 }
1245#endif
cea2e8a9 1246 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1247#ifdef __DATE__
1248# ifdef __TIME__
cea2e8a9 1249 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1250# else
cea2e8a9 1251 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1252# endif
1253#endif
3280af22 1254 sv_catpv(PL_Sv, "; \
6224f72b 1255$\"=\"\\n \"; \
69fcd688
JH
1256@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1257#ifdef __CYGWIN__
1258 sv_catpv(PL_Sv,"\
1259push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1260#endif
1261 sv_catpv(PL_Sv, "\
6224f72b
GS
1262print \" \\%ENV:\\n @env\\n\" if @env; \
1263print \" \\@INC:\\n @INC\\n\";");
1264 }
1265 else {
3280af22
NIS
1266 PL_Sv = newSVpv("config_vars(qw(",0);
1267 sv_catpv(PL_Sv, ++s);
1268 sv_catpv(PL_Sv, "))");
6224f72b
GS
1269 s += strlen(s);
1270 }
3280af22 1271 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1272 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1273 goto reswitch;
1274 case 'x':
3280af22 1275 PL_doextract = TRUE;
6224f72b
GS
1276 s++;
1277 if (*s)
f4c556ac 1278 cddir = s;
6224f72b
GS
1279 break;
1280 case 0:
1281 break;
1282 case '-':
1283 if (!*++s || isSPACE(*s)) {
1284 argc--,argv++;
1285 goto switch_end;
1286 }
1287 /* catch use of gnu style long options */
1288 if (strEQ(s, "version")) {
1289 s = "v";
1290 goto reswitch;
1291 }
1292 if (strEQ(s, "help")) {
1293 s = "h";
1294 goto reswitch;
1295 }
1296 s--;
1297 /* FALL THROUGH */
1298 default:
cea2e8a9 1299 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1300 }
1301 }
6224f72b 1302 switch_end:
54310121 1303
f675dbe5
CB
1304 if (
1305#ifndef SECURE_INTERNAL_GETENV
1306 !PL_tainting &&
1307#endif
cf756827 1308 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1309 {
cf756827 1310 char *popt = s;
74288ac8
GS
1311 while (isSPACE(*s))
1312 s++;
317ea90d 1313 if (*s == '-' && *(s+1) == 'T') {
74288ac8 1314 PL_tainting = TRUE;
317ea90d
MS
1315 PL_taint_warn = FALSE;
1316 }
74288ac8 1317 else {
cf756827 1318 char *popt_copy = Nullch;
74288ac8 1319 while (s && *s) {
4ea8f8fb 1320 char *d;
74288ac8
GS
1321 while (isSPACE(*s))
1322 s++;
1323 if (*s == '-') {
1324 s++;
1325 if (isSPACE(*s))
1326 continue;
1327 }
4ea8f8fb 1328 d = s;
74288ac8
GS
1329 if (!*s)
1330 break;
1c4db469 1331 if (!strchr("DIMUdmtw", *s))
cea2e8a9 1332 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1333 while (++s && *s) {
1334 if (isSPACE(*s)) {
cf756827
GS
1335 if (!popt_copy) {
1336 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1337 s = popt_copy + (s - popt);
1338 d = popt_copy + (d - popt);
1339 }
4ea8f8fb
MS
1340 *s++ = '\0';
1341 break;
1342 }
1343 }
1c4db469 1344 if (*d == 't') {
317ea90d
MS
1345 if( !PL_tainting ) {
1346 PL_taint_warn = TRUE;
1347 PL_tainting = TRUE;
1348 }
1c4db469
RGS
1349 } else {
1350 moreswitches(d);
1351 }
6224f72b 1352 }
6224f72b
GS
1353 }
1354 }
a0d0e21e 1355
317ea90d
MS
1356 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1357 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1358 }
1359
6224f72b
GS
1360 if (!scriptname)
1361 scriptname = argv[0];
3280af22 1362 if (PL_e_script) {
6224f72b
GS
1363 argc++,argv--;
1364 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1365 }
1366 else if (scriptname == Nullch) {
1367#ifdef MSDOS
1368 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1369 moreswitches("h");
1370#endif
1371 scriptname = "-";
1372 }
1373
1374 init_perllib();
1375
1376 open_script(scriptname,dosearch,sv,&fdscript);
1377
1378 validate_suid(validarg, scriptname,fdscript);
1379
64ca3a65 1380#ifndef PERL_MICRO
0b5b802d
GS
1381#if defined(SIGCHLD) || defined(SIGCLD)
1382 {
1383#ifndef SIGCHLD
1384# define SIGCHLD SIGCLD
1385#endif
1386 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1387 if (sigstate == SIG_IGN) {
1388 if (ckWARN(WARN_SIGNAL))
9014280d 1389 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
0b5b802d
GS
1390 "Can't ignore signal CHLD, forcing to default");
1391 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1392 }
1393 }
1394#endif
64ca3a65 1395#endif
0b5b802d 1396
bf4acbe4
GS
1397#ifdef MACOS_TRADITIONAL
1398 if (PL_doextract || gMacPerl_AlwaysExtract) {
1399#else
f4c556ac 1400 if (PL_doextract) {
bf4acbe4 1401#endif
6224f72b 1402 find_beginning();
f4c556ac
GS
1403 if (cddir && PerlDir_chdir(cddir) < 0)
1404 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1405
1406 }
6224f72b 1407
3280af22
NIS
1408 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1409 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1410 CvUNIQUE_on(PL_compcv);
1411
1412 PL_comppad = newAV();
1413 av_push(PL_comppad, Nullsv);
1414 PL_curpad = AvARRAY(PL_comppad);
1415 PL_comppad_name = newAV();
1416 PL_comppad_name_fill = 0;
1417 PL_min_intro_pending = 0;
1418 PL_padix = 0;
4d1ff10f 1419#ifdef USE_5005THREADS
79cb57f6 1420 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS
1421 PL_curpad[0] = (SV*)newAV();
1422 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1423 CvOWNER(PL_compcv) = 0;
1424 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1425 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1426#endif /* USE_5005THREADS */
6224f72b
GS
1427
1428 comppadlist = newAV();
1429 AvREAL_off(comppadlist);
3280af22
NIS
1430 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1431 av_store(comppadlist, 1, (SV*)PL_comppad);
1432 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1433
0c4f7ff0 1434 boot_core_PerlIO();
6224f72b 1435 boot_core_UNIVERSAL();
9a34ef1d 1436#ifndef PERL_MICRO
09bef843 1437 boot_core_xsutils();
9a34ef1d 1438#endif
6224f72b
GS
1439
1440 if (xsinit)
acfe0abc 1441 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1442#ifndef PERL_MICRO
ed79a026 1443#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1444 init_os_extras();
6224f72b 1445#endif
64ca3a65 1446#endif
6224f72b 1447
29209bc5 1448#ifdef USE_SOCKS
1b9c9cf5
DH
1449# ifdef HAS_SOCKS5_INIT
1450 socks5_init(argv[0]);
1451# else
29209bc5 1452 SOCKSinit(argv[0]);
1b9c9cf5 1453# endif
ac27b0f5 1454#endif
29209bc5 1455
6224f72b
GS
1456 init_predump_symbols();
1457 /* init_postdump_symbols not currently designed to be called */
1458 /* more than once (ENV isn't cleared first, for example) */
1459 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1460 if (!PL_do_undump)
6224f72b
GS
1461 init_postdump_symbols(argc,argv,env);
1462
b310b053
JH
1463 if (PL_wantutf8) { /* Requires init_predump_symbols(). */
1464 IO* io;
1465 PerlIO* fp;
1466 SV* sv;
1467 if (PL_stdingv && (io = GvIO(PL_stdingv)) && (fp = IoIFP(io)))
1468 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1469 if (PL_defoutgv && (io = GvIO(PL_defoutgv)) && (fp = IoOFP(io)))
1470 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1471 if (PL_stderrgv && (io = GvIO(PL_stderrgv)) && (fp = IoOFP(io)))
1472 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1473 if ((sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1474 sv_setpvn(sv, ":utf8\0:utf8", 11);
1475 SvSETMAGIC(sv);
1476 }
1477 }
1478
6224f72b
GS
1479 init_lexer();
1480
1481 /* now parse the script */
1482
91487cfc 1483 SETERRNO(0,SS$_NORMAL);
3280af22 1484 PL_error_count = 0;
bf4acbe4
GS
1485#ifdef MACOS_TRADITIONAL
1486 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1487 if (PL_minus_c)
1488 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1489 else {
1490 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1491 MacPerl_MPWFileName(PL_origfilename));
1492 }
1493 }
1494#else
3280af22
NIS
1495 if (yyparse() || PL_error_count) {
1496 if (PL_minus_c)
cea2e8a9 1497 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1498 else {
cea2e8a9 1499 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1500 PL_origfilename);
6224f72b
GS
1501 }
1502 }
bf4acbe4 1503#endif
57843af0 1504 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1505 PL_curstash = PL_defstash;
1506 PL_preprocess = FALSE;
1507 if (PL_e_script) {
1508 SvREFCNT_dec(PL_e_script);
1509 PL_e_script = Nullsv;
6224f72b
GS
1510 }
1511
8bfdd7d9
HS
1512/*
1513 Not sure that this is still the right place to do this now that we
1514 no longer use PL_nrs. HVDS 2001/09/09
1515*/
864dbfa3 1516 sv_setsv(get_sv("/", TRUE), PL_rs);
8bfdd7d9 1517
3280af22 1518 if (PL_do_undump)
6224f72b
GS
1519 my_unexec();
1520
57843af0
GS
1521 if (isWARN_ONCE) {
1522 SAVECOPFILE(PL_curcop);
1523 SAVECOPLINE(PL_curcop);
3280af22 1524 gv_check(PL_defstash);
57843af0 1525 }
6224f72b
GS
1526
1527 LEAVE;
1528 FREETMPS;
1529
1530#ifdef MYMALLOC
1531 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1532 dump_mstats("after compilation:");
1533#endif
1534
1535 ENTER;
3280af22 1536 PL_restartop = 0;
312caa8e 1537 return NULL;
6224f72b
GS
1538}
1539
954c1994
GS
1540/*
1541=for apidoc perl_run
1542
1543Tells a Perl interpreter to run. See L<perlembed>.
1544
1545=cut
1546*/
1547
6224f72b 1548int
0cb96387 1549perl_run(pTHXx)
6224f72b 1550{
6224f72b 1551 I32 oldscope;
14dd3ad8 1552 int ret = 0;
db36c5a1 1553 dJMPENV;
4d1ff10f 1554#ifdef USE_5005THREADS
cea2e8a9
GS
1555 dTHX;
1556#endif
6224f72b 1557
3280af22 1558 oldscope = PL_scopestack_ix;
96e176bf
CL
1559#ifdef VMS
1560 VMSISH_HUSHED = 0;
1561#endif
6224f72b 1562
14dd3ad8 1563#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1564 redo_body:
14dd3ad8
GS
1565 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1566#else
1567 JMPENV_PUSH(ret);
1568#endif
6224f72b
GS
1569 switch (ret) {
1570 case 1:
1571 cxstack_ix = -1; /* start context stack again */
312caa8e 1572 goto redo_body;
14dd3ad8
GS
1573 case 0: /* normal completion */
1574#ifndef PERL_FLEXIBLE_EXCEPTIONS
1575 redo_body:
1576 run_body(oldscope);
1577#endif
1578 /* FALL THROUGH */
1579 case 2: /* my_exit() */
3280af22 1580 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1581 LEAVE;
1582 FREETMPS;
3280af22 1583 PL_curstash = PL_defstash;
3a1ee7e8 1584 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
1585 PL_endav && !PL_minus_c)
1586 call_list(oldscope, PL_endav);
6224f72b
GS
1587#ifdef MYMALLOC
1588 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1589 dump_mstats("after execution: ");
1590#endif
14dd3ad8
GS
1591 ret = STATUS_NATIVE_EXPORT;
1592 break;
6224f72b 1593 case 3:
312caa8e
CS
1594 if (PL_restartop) {
1595 POPSTACK_TO(PL_mainstack);
1596 goto redo_body;
6224f72b 1597 }
bf49b057 1598 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1599 FREETMPS;
14dd3ad8
GS
1600 ret = 1;
1601 break;
6224f72b
GS
1602 }
1603
14dd3ad8
GS
1604 JMPENV_POP;
1605 return ret;
312caa8e
CS
1606}
1607
14dd3ad8 1608#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1609STATIC void *
14dd3ad8 1610S_vrun_body(pTHX_ va_list args)
312caa8e 1611{
312caa8e
CS
1612 I32 oldscope = va_arg(args, I32);
1613
14dd3ad8
GS
1614 return run_body(oldscope);
1615}
1616#endif
1617
1618
1619STATIC void *
1620S_run_body(pTHX_ I32 oldscope)
1621{
6224f72b 1622 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1623 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1624
3280af22 1625 if (!PL_restartop) {
6224f72b
GS
1626 DEBUG_x(dump_all());
1627 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1628 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1629 PTR2UV(thr)));
6224f72b 1630
3280af22 1631 if (PL_minus_c) {
bf4acbe4 1632#ifdef MACOS_TRADITIONAL
be708cc0 1633 PerlIO_printf(Perl_error_log, "# %s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1634#else
bf49b057 1635 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1636#endif
6224f72b
GS
1637 my_exit(0);
1638 }
3280af22 1639 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1640 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1641 if (PL_initav)
1642 call_list(oldscope, PL_initav);
6224f72b
GS
1643 }
1644
1645 /* do it */
1646
3280af22 1647 if (PL_restartop) {
533c011a 1648 PL_op = PL_restartop;
3280af22 1649 PL_restartop = 0;
cea2e8a9 1650 CALLRUNOPS(aTHX);
6224f72b 1651 }
3280af22
NIS
1652 else if (PL_main_start) {
1653 CvDEPTH(PL_main_cv) = 1;
533c011a 1654 PL_op = PL_main_start;
cea2e8a9 1655 CALLRUNOPS(aTHX);
6224f72b
GS
1656 }
1657
f6b3007c
JH
1658 my_exit(0);
1659 /* NOTREACHED */
312caa8e 1660 return NULL;
6224f72b
GS
1661}
1662
954c1994 1663/*
ccfc67b7
JH
1664=head1 SV Manipulation Functions
1665
954c1994
GS
1666=for apidoc p||get_sv
1667
1668Returns the SV of the specified Perl scalar. If C<create> is set and the
1669Perl variable does not exist then it will be created. If C<create> is not
1670set and the variable does not exist then NULL is returned.
1671
1672=cut
1673*/
1674
6224f72b 1675SV*
864dbfa3 1676Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1677{
1678 GV *gv;
4d1ff10f 1679#ifdef USE_5005THREADS
6224f72b
GS
1680 if (name[1] == '\0' && !isALPHA(name[0])) {
1681 PADOFFSET tmp = find_threadsv(name);
411caa50 1682 if (tmp != NOT_IN_PAD)
6224f72b 1683 return THREADSV(tmp);
6224f72b 1684 }
4d1ff10f 1685#endif /* USE_5005THREADS */
6224f72b
GS
1686 gv = gv_fetchpv(name, create, SVt_PV);
1687 if (gv)
1688 return GvSV(gv);
1689 return Nullsv;
1690}
1691
954c1994 1692/*
ccfc67b7
JH
1693=head1 Array Manipulation Functions
1694
954c1994
GS
1695=for apidoc p||get_av
1696
1697Returns the AV of the specified Perl array. If C<create> is set and the
1698Perl variable does not exist then it will be created. If C<create> is not
1699set and the variable does not exist then NULL is returned.
1700
1701=cut
1702*/
1703
6224f72b 1704AV*
864dbfa3 1705Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1706{
1707 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1708 if (create)
1709 return GvAVn(gv);
1710 if (gv)
1711 return GvAV(gv);
1712 return Nullav;
1713}
1714
954c1994 1715/*
ccfc67b7
JH
1716=head1 Hash Manipulation Functions
1717
954c1994
GS
1718=for apidoc p||get_hv
1719
1720Returns the HV of the specified Perl hash. If C<create> is set and the
1721Perl variable does not exist then it will be created. If C<create> is not
1722set and the variable does not exist then NULL is returned.
1723
1724=cut
1725*/
1726
6224f72b 1727HV*
864dbfa3 1728Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1729{
a0d0e21e
LW
1730 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1731 if (create)
1732 return GvHVn(gv);
1733 if (gv)
1734 return GvHV(gv);
1735 return Nullhv;
1736}
1737
954c1994 1738/*
ccfc67b7
JH
1739=head1 CV Manipulation Functions
1740
954c1994
GS
1741=for apidoc p||get_cv
1742
1743Returns the CV of the specified Perl subroutine. If C<create> is set and
1744the Perl subroutine does not exist then it will be declared (which has the
1745same effect as saying C<sub name;>). If C<create> is not set and the
1746subroutine does not exist then NULL is returned.
1747
1748=cut
1749*/
1750
a0d0e21e 1751CV*
864dbfa3 1752Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
1753{
1754 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1755 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
1756 /* XXX this is probably not what they think they're getting.
1757 * It has the same effect as "sub name;", i.e. just a forward
1758 * declaration! */
8ebc5c01 1759 if (create && !GvCVu(gv))
774d564b 1760 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1761 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1762 Nullop,
a0d0e21e
LW
1763 Nullop);
1764 if (gv)
8ebc5c01 1765 return GvCVu(gv);
a0d0e21e
LW
1766 return Nullcv;
1767}
1768
79072805
LW
1769/* Be sure to refetch the stack pointer after calling these routines. */
1770
954c1994 1771/*
ccfc67b7
JH
1772
1773=head1 Callback Functions
1774
954c1994
GS
1775=for apidoc p||call_argv
1776
1777Performs a callback to the specified Perl sub. See L<perlcall>.
1778
1779=cut
1780*/
1781
a0d0e21e 1782I32
864dbfa3 1783Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1784
8ac85365
NIS
1785 /* See G_* flags in cop.h */
1786 /* null terminated arg list */
8990e307 1787{
a0d0e21e 1788 dSP;
8990e307 1789
924508f0 1790 PUSHMARK(SP);
a0d0e21e 1791 if (argv) {
8990e307 1792 while (*argv) {
a0d0e21e 1793 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
1794 argv++;
1795 }
a0d0e21e 1796 PUTBACK;
8990e307 1797 }
864dbfa3 1798 return call_pv(sub_name, flags);
8990e307
LW
1799}
1800
954c1994
GS
1801/*
1802=for apidoc p||call_pv
1803
1804Performs a callback to the specified Perl sub. See L<perlcall>.
1805
1806=cut
1807*/
1808
a0d0e21e 1809I32
864dbfa3 1810Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
1811 /* name of the subroutine */
1812 /* See G_* flags in cop.h */
a0d0e21e 1813{
864dbfa3 1814 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
1815}
1816
954c1994
GS
1817/*
1818=for apidoc p||call_method
1819
1820Performs a callback to the specified Perl method. The blessed object must
1821be on the stack. See L<perlcall>.
1822
1823=cut
1824*/
1825
a0d0e21e 1826I32
864dbfa3 1827Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
1828 /* name of the subroutine */
1829 /* See G_* flags in cop.h */
a0d0e21e 1830{
968b3946 1831 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
1832}
1833
1834/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
1835/*
1836=for apidoc p||call_sv
1837
1838Performs a callback to the Perl sub whose name is in the SV. See
1839L<perlcall>.
1840
1841=cut
1842*/
1843
a0d0e21e 1844I32
864dbfa3 1845Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1846 /* See G_* flags in cop.h */
a0d0e21e 1847{
924508f0 1848 dSP;
a0d0e21e 1849 LOGOP myop; /* fake syntax tree node */
968b3946 1850 UNOP method_op;
aa689395 1851 I32 oldmark;
13689cfe 1852 volatile I32 retval = 0;
a0d0e21e 1853 I32 oldscope;
54310121 1854 bool oldcatch = CATCH_GET;
6224f72b 1855 int ret;
533c011a 1856 OP* oldop = PL_op;
db36c5a1 1857 dJMPENV;
1e422769 1858
a0d0e21e
LW
1859 if (flags & G_DISCARD) {
1860 ENTER;
1861 SAVETMPS;
1862 }
1863
aa689395 1864 Zero(&myop, 1, LOGOP);
54310121 1865 myop.op_next = Nullop;
f51d4af5 1866 if (!(flags & G_NOARGS))
aa689395 1867 myop.op_flags |= OPf_STACKED;
54310121
PP
1868 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1869 (flags & G_ARRAY) ? OPf_WANT_LIST :
1870 OPf_WANT_SCALAR);
462e5cf6 1871 SAVEOP();
533c011a 1872 PL_op = (OP*)&myop;
aa689395 1873
3280af22
NIS
1874 EXTEND(PL_stack_sp, 1);
1875 *++PL_stack_sp = sv;
aa689395 1876 oldmark = TOPMARK;
3280af22 1877 oldscope = PL_scopestack_ix;
a0d0e21e 1878
3280af22 1879 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1880 /* Handle first BEGIN of -d. */
3280af22 1881 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
1882 /* Try harder, since this may have been a sighandler, thus
1883 * curstash may be meaningless. */
3280af22 1884 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1885 && !(flags & G_NODEBUG))
533c011a 1886 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1887
968b3946
GS
1888 if (flags & G_METHOD) {
1889 Zero(&method_op, 1, UNOP);
1890 method_op.op_next = PL_op;
1891 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1892 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1893 PL_op = (OP*)&method_op;
968b3946
GS
1894 }
1895
312caa8e 1896 if (!(flags & G_EVAL)) {
0cdb2077 1897 CATCH_SET(TRUE);
14dd3ad8 1898 call_body((OP*)&myop, FALSE);
312caa8e 1899 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1900 CATCH_SET(oldcatch);
312caa8e
CS
1901 }
1902 else {
d78bda3d 1903 myop.op_other = (OP*)&myop;
3280af22 1904 PL_markstack_ptr--;
4633a7c4
LW
1905 /* we're trying to emulate pp_entertry() here */
1906 {
c09156bb 1907 register PERL_CONTEXT *cx;
54310121 1908 I32 gimme = GIMME_V;
ac27b0f5 1909
4633a7c4
LW
1910 ENTER;
1911 SAVETMPS;
ac27b0f5 1912
968b3946 1913 push_return(Nullop);
1d76a5c3 1914 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1915 PUSHEVAL(cx, 0, 0);
533c011a 1916 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1917
faef0170 1918 PL_in_eval = EVAL_INEVAL;
4633a7c4 1919 if (flags & G_KEEPERR)
faef0170 1920 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1921 else
38a03e6e 1922 sv_setpv(ERRSV,"");
4633a7c4 1923 }
3280af22 1924 PL_markstack_ptr++;
a0d0e21e 1925
14dd3ad8
GS
1926#ifdef PERL_FLEXIBLE_EXCEPTIONS
1927 redo_body:
1928 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1929 (OP*)&myop, FALSE);
14dd3ad8
GS
1930#else
1931 JMPENV_PUSH(ret);
1932#endif
6224f72b
GS
1933 switch (ret) {
1934 case 0:
14dd3ad8
GS
1935#ifndef PERL_FLEXIBLE_EXCEPTIONS
1936 redo_body:
1937 call_body((OP*)&myop, FALSE);
1938#endif
312caa8e
CS
1939 retval = PL_stack_sp - (PL_stack_base + oldmark);
1940 if (!(flags & G_KEEPERR))
1941 sv_setpv(ERRSV,"");
a0d0e21e 1942 break;
6224f72b 1943 case 1:
f86702cc 1944 STATUS_ALL_FAILURE;
a0d0e21e 1945 /* FALL THROUGH */
6224f72b 1946 case 2:
a0d0e21e 1947 /* my_exit() was called */
3280af22 1948 PL_curstash = PL_defstash;
a0d0e21e 1949 FREETMPS;
14dd3ad8 1950 JMPENV_POP;
cc3604b1 1951 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1952 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1953 my_exit_jump();
a0d0e21e 1954 /* NOTREACHED */
6224f72b 1955 case 3:
3280af22 1956 if (PL_restartop) {
533c011a 1957 PL_op = PL_restartop;
3280af22 1958 PL_restartop = 0;
312caa8e 1959 goto redo_body;
a0d0e21e 1960 }
3280af22 1961 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1962 if (flags & G_ARRAY)
1963 retval = 0;
1964 else {
1965 retval = 1;
3280af22 1966 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1967 }
312caa8e 1968 break;
a0d0e21e 1969 }
a0d0e21e 1970
3280af22 1971 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
1972 SV **newsp;
1973 PMOP *newpm;
1974 I32 gimme;
c09156bb 1975 register PERL_CONTEXT *cx;
a0a2876f
LW
1976 I32 optype;
1977
1978 POPBLOCK(cx,newpm);
1979 POPEVAL(cx);
1980 pop_return();
3280af22 1981 PL_curpm = newpm;
a0a2876f 1982 LEAVE;
a0d0e21e 1983 }
14dd3ad8 1984 JMPENV_POP;
a0d0e21e 1985 }
1e422769 1986
a0d0e21e 1987 if (flags & G_DISCARD) {
3280af22 1988 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1989 retval = 0;
1990 FREETMPS;
1991 LEAVE;
1992 }
533c011a 1993 PL_op = oldop;
a0d0e21e
LW
1994 return retval;
1995}
1996
14dd3ad8 1997#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1998STATIC void *
14dd3ad8 1999S_vcall_body(pTHX_ va_list args)
312caa8e
CS
2000{
2001 OP *myop = va_arg(args, OP*);
2002 int is_eval = va_arg(args, int);
2003
14dd3ad8 2004 call_body(myop, is_eval);
312caa8e
CS
2005 return NULL;
2006}
14dd3ad8 2007#endif
312caa8e
CS
2008
2009STATIC void
14dd3ad8 2010S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 2011{
312caa8e
CS
2012 if (PL_op == myop) {
2013 if (is_eval)
f807eda9 2014 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 2015 else
f807eda9 2016 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
2017 }
2018 if (PL_op)
cea2e8a9 2019 CALLRUNOPS(aTHX);
312caa8e
CS
2020}
2021
6e72f9df 2022/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 2023
954c1994
GS
2024/*
2025=for apidoc p||eval_sv
2026
2027Tells Perl to C<eval> the string in the SV.
2028
2029=cut
2030*/
2031
a0d0e21e 2032I32
864dbfa3 2033Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 2034
8ac85365 2035 /* See G_* flags in cop.h */
a0d0e21e 2036{
924508f0 2037 dSP;
a0d0e21e 2038 UNOP myop; /* fake syntax tree node */
8fa7f367 2039 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 2040 volatile I32 retval = 0;
4633a7c4 2041 I32 oldscope;
6224f72b 2042 int ret;
533c011a 2043 OP* oldop = PL_op;
db36c5a1 2044 dJMPENV;
84902520 2045
4633a7c4
LW
2046 if (flags & G_DISCARD) {
2047 ENTER;
2048 SAVETMPS;
2049 }
2050
462e5cf6 2051 SAVEOP();
533c011a
NIS
2052 PL_op = (OP*)&myop;
2053 Zero(PL_op, 1, UNOP);
3280af22
NIS
2054 EXTEND(PL_stack_sp, 1);
2055 *++PL_stack_sp = sv;
2056 oldscope = PL_scopestack_ix;
79072805 2057
4633a7c4
LW
2058 if (!(flags & G_NOARGS))
2059 myop.op_flags = OPf_STACKED;
79072805 2060 myop.op_next = Nullop;
6e72f9df 2061 myop.op_type = OP_ENTEREVAL;
54310121
PP
2062 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2063 (flags & G_ARRAY) ? OPf_WANT_LIST :
2064 OPf_WANT_SCALAR);
6e72f9df
PP
2065 if (flags & G_KEEPERR)
2066 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2067
14dd3ad8 2068#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2069 redo_body:
14dd3ad8 2070 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2071 (OP*)&myop, TRUE);
14dd3ad8
GS
2072#else
2073 JMPENV_PUSH(ret);
2074#endif
6224f72b
GS
2075 switch (ret) {
2076 case 0:
14dd3ad8
GS
2077#ifndef PERL_FLEXIBLE_EXCEPTIONS
2078 redo_body:
2079 call_body((OP*)&myop,TRUE);
2080#endif
312caa8e
CS
2081 retval = PL_stack_sp - (PL_stack_base + oldmark);
2082 if (!(flags & G_KEEPERR))
2083 sv_setpv(ERRSV,"");
4633a7c4 2084 break;
6224f72b 2085 case 1:
f86702cc 2086 STATUS_ALL_FAILURE;
4633a7c4 2087 /* FALL THROUGH */
6224f72b 2088 case 2:
4633a7c4 2089 /* my_exit() was called */
3280af22 2090 PL_curstash = PL_defstash;
4633a7c4 2091 FREETMPS;
14dd3ad8 2092 JMPENV_POP;
cc3604b1 2093 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2094 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2095 my_exit_jump();
4633a7c4 2096 /* NOTREACHED */
6224f72b 2097 case 3:
3280af22 2098 if (PL_restartop) {
533c011a 2099 PL_op = PL_restartop;
3280af22 2100 PL_restartop = 0;
312caa8e 2101 goto redo_body;
4633a7c4 2102 }
3280af22 2103 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2104 if (flags & G_ARRAY)
2105 retval = 0;
2106 else {
2107 retval = 1;
3280af22 2108 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2109 }
312caa8e 2110 break;
4633a7c4
LW
2111 }
2112
14dd3ad8 2113 JMPENV_POP;
4633a7c4 2114 if (flags & G_DISCARD) {
3280af22 2115 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2116 retval = 0;
2117 FREETMPS;
2118 LEAVE;
2119 }
533c011a 2120 PL_op = oldop;
4633a7c4
LW
2121 return retval;
2122}
2123
954c1994
GS
2124/*
2125=for apidoc p||eval_pv
2126
2127Tells Perl to C<eval> the given string and return an SV* result.
2128
2129=cut
2130*/
2131
137443ea 2132SV*
864dbfa3 2133Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2134{
2135 dSP;
2136 SV* sv = newSVpv(p, 0);
2137
864dbfa3 2138 eval_sv(sv, G_SCALAR);
137443ea
PP
2139 SvREFCNT_dec(sv);
2140
2141 SPAGAIN;
2142 sv = POPs;
2143 PUTBACK;
2144
2d8e6c8d
GS
2145 if (croak_on_error && SvTRUE(ERRSV)) {
2146 STRLEN n_a;
cea2e8a9 2147 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2148 }
137443ea
PP
2149
2150 return sv;
2151}
2152
4633a7c4
LW
2153/* Require a module. */
2154
954c1994 2155/*
ccfc67b7
JH
2156=head1 Embedding Functions
2157
954c1994
GS
2158=for apidoc p||require_pv
2159
7d3fb230
BS
2160Tells Perl to C<require> the file named by the string argument. It is
2161analogous to the Perl code C<eval "require '$file'">. It's even
2162implemented that way; consider using Perl_load_module instead.
954c1994 2163
7d3fb230 2164=cut */
954c1994 2165
4633a7c4 2166void
864dbfa3 2167Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2168{
d3acc0f7
JP
2169 SV* sv;
2170 dSP;
e788e7d3 2171 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2172 PUTBACK;
2173 sv = sv_newmortal();
4633a7c4
LW
2174 sv_setpv(sv, "require '");
2175 sv_catpv(sv, pv);
2176 sv_catpv(sv, "'");
864dbfa3 2177 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2178 SPAGAIN;
2179 POPSTACK;
79072805
LW
2180}
2181
79072805 2182void
864dbfa3 2183Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW
2184{
2185 register GV *gv;
2186
155aba94 2187 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2188 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2189}
2190
76e3520e 2191STATIC void
cea2e8a9 2192S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2193{
ab821d7f 2194 /* This message really ought to be max 23 lines.
75c72d73 2195 * Removed -h because the user already knows that option. Others? */
fb73857a 2196
76e3520e 2197 static char *usage_msg[] = {
fb73857a
PP
2198"-0[octal] specify record separator (\\0, if no argument)",
2199"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2200"-C enable native wide character system interfaces",
1950ee41 2201"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2202"-d[:debugger] run program under debugger",
2203"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2204"-e 'command' one line of program (several -e's allowed, omit programfile)",
2205"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2206"-i[extension] edit <> files in place (makes backup if extension supplied)",
2207"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2208"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2209"-[mM][-]module execute `use/no module...' before executing program",
2210"-n assume 'while (<>) { ... }' loop around program",
2211"-p assume loop like -n but print line also, like sed",
2212"-P run program through C preprocessor before compilation",
2213"-s enable rudimentary parsing for switches after programfile",
2214"-S look for programfile using PATH environment variable",
2215"-T enable tainting checks",
9cbc33e8 2216"-t enable tainting warnings",
aac3bd0d 2217"-u dump core after parsing program",
fb73857a 2218"-U allow unsafe operations",
aac3bd0d
GS
2219"-v print version, subversion (includes VERY IMPORTANT perl info)",
2220"-V[:variable] print configuration summary (or a single Config.pm variable)",
2221"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS
2222"-W enable all warnings",
2223"-X disable all warnings",
fb73857a
PP
2224"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2225"\n",
2226NULL
2227};
76e3520e 2228 char **p = usage_msg;
fb73857a 2229
b0e47665
GS
2230 PerlIO_printf(PerlIO_stdout(),
2231 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2232 name);
fb73857a 2233 while (*p)
b0e47665 2234 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2235}
2236
79072805
LW
2237/* This routine handles any switches that can be given during run */
2238
2239char *
864dbfa3 2240Perl_moreswitches(pTHX_ char *s)
79072805 2241{
ba210ebe 2242 STRLEN numlen;
c07a80fd 2243 U32 rschar;
79072805
LW
2244
2245 switch (*s) {
2246 case '0':
a863c7d1 2247 {
53305cf1
NC
2248 I32 flags = 0;
2249 numlen = 4;
2250 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
8bfdd7d9 2251 SvREFCNT_dec(PL_rs);
c07a80fd 2252 if (rschar & ~((U8)~0))
8bfdd7d9 2253 PL_rs = &PL_sv_undef;
c07a80fd 2254 else if (!rschar && numlen >= 2)
8bfdd7d9 2255 PL_rs = newSVpvn("", 0);
c07a80fd
PP
2256 else {
2257 char ch = rschar;
8bfdd7d9 2258 PL_rs = newSVpvn(&ch, 1);
79072805
LW
2259 }
2260 return s + numlen;
a863c7d1 2261 }
46487f74
GS
2262 case 'C':
2263 PL_widesyscalls = TRUE;
2264 s++;
2265 return s;
2304df62 2266 case 'F':
3280af22 2267 PL_minus_F = TRUE;
ebce5377
RGS
2268 PL_splitstr = ++s;
2269 while (*s && !isSPACE(*s)) ++s;
2270 *s = '\0';
2271 PL_splitstr = savepv(PL_splitstr);
2304df62 2272 return s;
79072805 2273 case 'a':
3280af22 2274 PL_minus_a = TRUE;
79072805
LW
2275 s++;
2276 return s;
2277 case 'c':
3280af22 2278 PL_minus_c = TRUE;
79072805
LW
2279 s++;
2280 return s;
2281 case 'd':
bbce6d69 2282 forbid_setid("-d");
4633a7c4 2283 s++;
70c94a19
RR
2284 /* The following permits -d:Mod to accepts arguments following an =
2285 in the fashion that -MSome::Mod does. */
2286 if (*s == ':' || *s == '=') {
2287 char *start;
2288 SV *sv;
2289 sv = newSVpv("use Devel::", 0);
2290 start = ++s;
2291 /* We now allow -d:Module=Foo,Bar */
2292 while(isALNUM(*s) || *s==':') ++s;
2293 if (*s != '=')
2294 sv_catpv(sv, start);
2295 else {
2296 sv_catpvn(sv, start, s-start);
2297 sv_catpv(sv, " split(/,/,q{");
2298 sv_catpv(sv, ++s);
2299 sv_catpv(sv, "})");
2300 }
4633a7c4 2301 s += strlen(s);
70c94a19 2302 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2303 }
ed094faf 2304 if (!PL_perldb) {
3280af22 2305 PL_perldb = PERLDB_ALL;
a0d0e21e 2306 init_debugger();
ed094faf 2307 }
79072805
LW
2308 return s;
2309 case 'D':
0453d815 2310 {
79072805 2311#ifdef DEBUGGING
bbce6d69 2312 forbid_setid("-D");
79072805 2313 if (isALPHA(s[1])) {
04932ac8 2314 /* if adding extra options, remember to update DEBUG_MASK */
1045810a 2315 static char debopts[] = "psltocPmfrxuLHXDSTRJ";
79072805
LW
2316 char *d;
2317
93a17b20 2318 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2319 PL_debug |= 1 << (d - debopts);
79072805
LW
2320 }
2321 else {
3280af22 2322 PL_debug = atoi(s+1);
79072805
LW
2323 for (s++; isDIGIT(*s); s++) ;
2324 }
2ac72d6e 2325#ifdef EBCDIC
12a43e32
JH
2326 if (DEBUG_p_TEST_ && ckWARN_d(WARN_DEBUGGING))
2327 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2328 "-Dp not implemented on this platform\n");
2329#endif
aea4f609 2330 PL_debug |= DEBUG_TOP_FLAG;
12a43e32 2331#else /* !DEBUGGING */
0453d815 2332 if (ckWARN_d(WARN_DEBUGGING))
9014280d 2333 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
0453d815 2334 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2335 for (s++; isALNUM(*s); s++) ;
79072805
LW
2336#endif
2337 /*SUPPRESS 530*/
2338 return s;
0453d815 2339 }
4633a7c4 2340 case 'h':
ac27b0f5 2341 usage(PL_origargv[0]);
6ad3d225 2342 PerlProc_exit(0);
79072805 2343 case 'i':
3280af22
NIS
2344 if (PL_inplace)
2345 Safefree(PL_inplace);
2346 PL_inplace = savepv(s+1);
79072805 2347 /*SUPPRESS 530*/
3280af22 2348 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2349 if (*s) {
fb73857a 2350 *s++ = '\0';
7b8d334a
GS
2351 if (*s == '-') /* Additional switches on #! line. */
2352 s++;
2353 }
fb73857a 2354 return s;
4e49a025 2355 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2356 forbid_setid("-I");
fb73857a
PP
2357 ++s;
2358 while (*s && isSPACE(*s))
2359 ++s;
2360 if (*s) {
774d564b 2361 char *e, *p;
0df16ed7
GS
2362 p = s;
2363 /* ignore trailing spaces (possibly followed by other switches) */
2364 do {
2365 for (e = p; *e && !isSPACE(*e); e++) ;
2366 p = e;
2367 while (isSPACE(*p))
2368 p++;
2369 } while (*p && *p != '-');
2370 e = savepvn(s, e-s);
9c8a64f0 2371 incpush(e, TRUE, TRUE);
0df16ed7
GS
2372 Safefree(e);
2373 s = p;
2374 if (*s == '-')
2375 s++;
79072805
LW
2376 }
2377 else
a67e862a 2378 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2379 return s;
79072805 2380 case 'l':
3280af22 2381 PL_minus_l = TRUE;
79072805 2382 s++;
7889fe52
NIS
2383 if (PL_ors_sv) {
2384 SvREFCNT_dec(PL_ors_sv);
2385 PL_ors_sv = Nullsv;
2386 }
79072805 2387 if (isDIGIT(*s)) {
53305cf1 2388 I32 flags = 0;
7889fe52 2389 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2390 numlen = 3 + (*s == '0');
2391 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2392 s += numlen;
2393 }
2394 else {
8bfdd7d9 2395 if (RsPARA(PL_rs)) {
7889fe52
NIS
2396 PL_ors_sv = newSVpvn("\n\n",2);
2397 }
2398 else {
8bfdd7d9 2399 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2400 }
79072805
LW
2401 }
2402 return s;
1a30305b 2403 case 'M':
bbce6d69 2404 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2405 /* FALL THROUGH */
2406 case 'm':
bbce6d69 2407 forbid_setid("-m"); /* XXX ? */
1a30305b 2408 if (*++s) {
a5f75d66 2409 char *start;
11343788 2410 SV *sv;
a5f75d66
AD
2411 char *use = "use ";
2412 /* -M-foo == 'no foo' */
2413 if (*s == '-') { use = "no "; ++s; }
11343788 2414 sv = newSVpv(use,0);
a5f75d66 2415 start = s;
1a30305b 2416 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2417 while(isALNUM(*s) || *s==':') ++s;
2418 if (*s != '=') {
11343788 2419 sv_catpv(sv, start);
c07a80fd
PP
2420 if (*(start-1) == 'm') {
2421 if (*s != '\0')
cea2e8a9 2422 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2423 sv_catpv( sv, " ()");
c07a80fd
PP
2424 }
2425 } else {
6df41af2 2426 if (s == start)
be98fb35
GS
2427 Perl_croak(aTHX_ "Module name required with -%c option",
2428 s[-1]);
11343788
MB
2429 sv_catpvn(sv, start, s-start);
2430 sv_catpv(sv, " split(/,/,q{");
2431 sv_catpv(sv, ++s);
2432 sv_catpv(sv, "})");
c07a80fd 2433 }
1a30305b 2434 s += strlen(s);
5c831c24 2435 if (!PL_preambleav)
3280af22
NIS
2436 PL_preambleav = newAV();
2437 av_push(PL_preambleav, sv);
1a30305b
PP
2438 }
2439 else
cea2e8a9 2440 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2441 return s;
79072805 2442 case 'n':
3280af22 2443 PL_minus_n = TRUE;
79072805
LW
2444 s++;
2445 return s;
2446 case 'p':
3280af22 2447 PL_minus_p = TRUE;
79072805
LW
2448 s++;
2449 return s;
2450 case 's':
bbce6d69 2451 forbid_setid("-s");
3280af22 2452 PL_doswitches = TRUE;
79072805
LW
2453 s++;
2454 return s;
6537fe72
MS
2455 case 't':
2456 if (!PL_tainting)
2457 Perl_croak(aTHX_ "Too late for \"-t\" option");
2458 s++;
2459 return s;
463ee0b2 2460 case 'T':
3280af22 2461 if (!PL_tainting)
cea2e8a9 2462 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW
2463 s++;
2464 return s;
79072805 2465 case 'u':
bf4acbe4
GS
2466#ifdef MACOS_TRADITIONAL
2467 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2468#endif
3280af22 2469 PL_do_undump = TRUE;
79072805
LW
2470 s++;
2471 return s;
2472 case 'U':
3280af22 2473 PL_unsafe = TRUE;
79072805
LW
2474 s++;
2475 return s;
2476 case 'v':
8e9464f1 2477#if !defined(DGUX)
b0e47665 2478 PerlIO_printf(PerlIO_stdout(),
d2560b70 2479 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2480 PL_patchlevel, ARCHNAME));
8e9464f1
JH
2481#else /* DGUX */
2482/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2483 PerlIO_printf(PerlIO_stdout(),
2484 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2485 PerlIO_printf(PerlIO_stdout(),
2486 Perl_form(aTHX_ " built under %s at %s %s\n",
2487 OSNAME, __DATE__, __TIME__));
2488 PerlIO_printf(PerlIO_stdout(),
2489 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2490 OSVERS));
8e9464f1
JH
2491#endif /* !DGUX */
2492
fb73857a
PP
2493#if defined(LOCAL_PATCH_COUNT)
2494 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2495 PerlIO_printf(PerlIO_stdout(),
2496 "\n(with %d registered patch%s, "
2497 "see perl -V for more detail)",
2498 (int)LOCAL_PATCH_COUNT,
2499 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2500#endif
1a30305b 2501
b0e47665 2502 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2503 "\n\nCopyright 1987-2002, Larry Wall\n");
eae9c151
JH
2504#ifdef MACOS_TRADITIONAL
2505 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2506 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 2507 "maintained by Chris Nandor\n");
eae9c151 2508#endif
79072805 2509#ifdef MSDOS
b0e47665
GS
2510 PerlIO_printf(PerlIO_stdout(),
2511 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2512#endif
2513#ifdef DJGPP
b0e47665
GS
2514 PerlIO_printf(PerlIO_stdout(),
2515 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2516 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2517#endif
79072805 2518#ifdef OS2
b0e47665
GS
2519 PerlIO_printf(PerlIO_stdout(),
2520 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 2521 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2522#endif
79072805 2523#ifdef atarist
b0e47665
GS
2524 PerlIO_printf(PerlIO_stdout(),
2525 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2526#endif
a3f9223b 2527#ifdef __BEOS__
b0e47665
GS
2528 PerlIO_printf(PerlIO_stdout(),
2529 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2530#endif
1d84e8df 2531#ifdef MPE
b0e47665 2532 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2533 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2002\n");
1d84e8df 2534#endif
9d116dd7 2535#ifdef OEMVS
b0e47665
GS
2536 PerlIO_printf(PerlIO_stdout(),
2537 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2538#endif
495c5fdc 2539#ifdef __VOS__
b0e47665 2540 PerlIO_printf(PerlIO_stdout(),
94efb9fb 2541 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 2542#endif
092bebab 2543#ifdef __OPEN_VM
b0e47665
GS
2544 PerlIO_printf(PerlIO_stdout(),
2545 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2546#endif
a1a0e61e 2547#ifdef POSIX_BC
b0e47665
GS
2548 PerlIO_printf(PerlIO_stdout(),
2549 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2550#endif
61ae2fbf 2551#ifdef __MINT__
b0e47665
GS
2552 PerlIO_printf(PerlIO_stdout(),
2553 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2554#endif
f83d2536 2555#ifdef EPOC
b0e47665 2556 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2557 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 2558#endif
e1caacb4 2559#ifdef UNDER_CE
be3c0a43 2560 printf("WINCE port by Rainer Keuchel, 2001-2002\n");
e1caacb4
JH
2561 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2562 wce_hitreturn();
2563#endif
baed7233
DL
2564#ifdef BINARY_BUILD_NOTICE
2565 BINARY_BUILD_NOTICE;
2566#endif
b0e47665
GS
2567 PerlIO_printf(PerlIO_stdout(),
2568 "\n\
79072805 2569Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2570GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2571Complete documentation for Perl, including FAQ lists, should be found on\n\
2572this system using `man perl' or `perldoc perl'. If you have access to the\n\
2573Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2574 PerlProc_exit(0);
79072805 2575 case 'w':
599cee73 2576 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2577 PL_dowarn |= G_WARN_ON;
599cee73
PM
2578 s++;
2579 return s;
2580 case 'W':
ac27b0f5 2581 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS
2582 if (!specialWARN(PL_compiling.cop_warnings))
2583 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2584 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2585 s++;
2586 return s;
2587 case 'X':
ac27b0f5 2588 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS
2589 if (!specialWARN(PL_compiling.cop_warnings))
2590 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2591 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2592 s++;
2593 return s;
a0d0e21e 2594 case '*':
79072805
LW
2595 case ' ':
2596 if (s[1] == '-') /* Additional switches on #! line. */
2597 return s+2;
2598 break;
a0d0e21e 2599 case '-':
79072805 2600 case 0:
51882d45 2601#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2602 case '\r':
2603#endif
79072805
LW
2604 case '\n':
2605 case '\t':
2606 break;
aa689395
PP
2607#ifdef ALTERNATE_SHEBANG
2608 case 'S': /* OS/2 needs -S on "extproc" line. */
2609 break;
2610#endif
a0d0e21e 2611 case 'P':
3280af22 2612 if (PL_preprocess)
a0d0e21e
LW
2613 return s+1;
2614 /* FALL THROUGH */
79072805 2615 default:
cea2e8a9 2616 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2617 }
2618 return Nullch;
2619}
2620
2621/* compliments of Tom Christiansen */
2622
2623/* unexec() can be found in the Gnu emacs distribution */
ee580363 2624/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2625
2626void
864dbfa3 2627Perl_my_unexec(pTHX)
79072805
LW
2628{
2629#ifdef UNEXEC
46fc3d4c
PP
2630 SV* prog;
2631 SV* file;
ee580363 2632 int status = 1;
79072805
LW
2633 extern int etext;
2634
ee580363 2635 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2636 sv_catpv(prog, "/perl");
6b88bc9c 2637 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2638 sv_catpv(file, ".perldump");
79072805 2639
ee580363
GS
2640 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2641 /* unexec prints msg to stderr in case of failure */
6ad3d225 2642 PerlProc_exit(status);
79072805 2643#else
a5f75d66
AD
2644# ifdef VMS
2645# include <lib$routines.h>
2646 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2647# else
79072805 2648 ABORT(); /* for use with undump */
aa689395 2649# endif
a5f75d66 2650#endif
79072805
LW
2651}
2652
cb68f92d
GS
2653/* initialize curinterp */
2654STATIC void
cea2e8a9 2655S_init_interp(pTHX)
cb68f92d
GS
2656{
2657
acfe0abc
GS
2658#ifdef MULTIPLICITY
2659# define PERLVAR(var,type)
2660# define PERLVARA(var,n,type)
2661# if defined(PERL_IMPLICIT_CONTEXT)
2662# if defined(USE_5005THREADS)
2663# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2664# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
2665# else /* !USE_5005THREADS */
2666# define PERLVARI(var,type,init) aTHX->var = init;
2667# define PERLVARIC(var,type,init) aTHX->var = init;
2668# endif /* USE_5005THREADS */
3967c732 2669# else
acfe0abc
GS
2670# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2671# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2672# endif
acfe0abc
GS
2673# include "intrpvar.h"
2674# ifndef USE_5005THREADS
2675# include "thrdvar.h"
2676# endif
2677# undef PERLVAR
2678# undef PERLVARA
2679# undef PERLVARI
2680# undef PERLVARIC
2681#else
2682# define PERLVAR(var,type)
2683# define PERLVARA(var,n,type)
2684# define PERLVARI(var,type,init) PL_##var = init;
2685# define PERLVARIC(var,type,init) PL_##var = init;
2686# include "intrpvar.h"
2687# ifndef USE_5005THREADS
2688# include "thrdvar.h"
2689# endif
2690# undef PERLVAR
2691# undef PERLVARA
2692# undef PERLVARI
2693# undef PERLVARIC
cb68f92d
GS
2694#endif
2695
cb68f92d
GS
2696}
2697
76e3520e 2698STATIC void
cea2e8a9 2699S_init_main_stash(pTHX)
79072805 2700{
463ee0b2 2701 GV *gv;
6e72f9df 2702
3280af22 2703 PL_curstash = PL_defstash = newHV();
79cb57f6 2704 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
2705 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2706 SvREFCNT_dec(GvHV(gv));
3280af22 2707 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2708 SvREADONLY_on(gv);
3280af22
NIS
2709 HvNAME(PL_defstash) = savepv("main");
2710 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2711 GvMULTI_on(PL_incgv);
2712 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2713 GvMULTI_on(PL_hintgv);
2714 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2715 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2716 GvMULTI_on(PL_errgv);
2717 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2718 GvMULTI_on(PL_replgv);
cea2e8a9 2719 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
2720 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2721 sv_setpvn(ERRSV, "", 0);
3280af22 2722 PL_curstash = PL_defstash;
11faa288 2723 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2724 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2725 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2726 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2727 /* We must init $/ before switches are processed. */
864dbfa3 2728 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
2729}
2730
76e3520e 2731STATIC void
cea2e8a9 2732S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2733{
1b24ed4b
MS
2734 char *quote;
2735 char *code;
2736 char *cpp_discard_flag;
2737 char *perl;
2738
6c4ab083 2739 *fdscript = -1;
79072805 2740
3280af22
NIS
2741 if (PL_e_script) {
2742 PL_origfilename = savepv("-e");
96436eeb 2743 }
6c4ab083
GS
2744 else {
2745 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2746 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
2747
2748 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2749 char *s = scriptname + 8;
2750 *fdscript = atoi(s);
2751 while (isDIGIT(*s))
2752 s++;
2753 if (*s) {
2754 scriptname = savepv(s + 1);
3280af22
NIS
2755 Safefree(PL_origfilename);
2756 PL_origfilename = scriptname;
6c4ab083
GS
2757 }
2758 }
2759 }
2760
05ec9bb3 2761 CopFILE_free(PL_curcop);
57843af0 2762 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2763 if (strEQ(PL_origfilename,"-"))
79072805 2764 scriptname = "";
01f988be 2765 if (*fdscript >= 0) {
3280af22 2766 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS
2767# if defined(HAS_FCNTL) && defined(F_SETFD)
2768 if (PL_rsfp)
2769 /* ensure close-on-exec */
2770 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2771# endif
96436eeb 2772 }
3280af22 2773 else if (PL_preprocess) {
46fc3d4c 2774 char *cpp_cfg = CPPSTDIN;
79cb57f6 2775 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
2776 SV *cmd = NEWSV(0,0);
2777
2778 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2779 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2780 sv_catpv(cpp, cpp_cfg);
79072805 2781
1b24ed4b
MS
2782# ifndef VMS
2783 sv_catpvn(sv, "-I", 2);
2784 sv_catpv(sv,PRIVLIB_EXP);
2785# endif
46fc3d4c 2786
14953ddc
MB
2787 DEBUG_P(PerlIO_printf(Perl_debug_log,
2788 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2789 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS
2790
2791# if defined(MSDOS) || defined(WIN32) || defined(VMS)
2792 quote = "\"";
2793# else
2794 quote = "'";
2795# endif
2796
2797# ifdef VMS
2798 cpp_discard_flag = "";
2799# else
2800 cpp_discard_flag = "-C";
2801# endif
2802
2803# ifdef OS2
2804 perl = os2_execname(aTHX);
2805# else
2806 perl = PL_origargv[0];
2807# endif
2808
2809
2810 /* This strips off Perl comments which might interfere with
62375a60
NIS
2811 the C pre-processor, including #!. #line directives are
2812 deliberately stripped to avoid confusion with Perl's version
1b24ed4b
MS
2813 of #line. FWP played some golf with it so it will fit
2814 into VMS's 255 character buffer.
2815 */
2816 if( PL_doextract )
2817 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2818 else
2819 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2820
2821 Perl_sv_setpvf(aTHX_ cmd, "\
2822%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
62375a60 2823 perl, quote, code, quote, scriptname, cpp,
1b24ed4b
MS
2824 cpp_discard_flag, sv, CPPMINUS);
2825
3280af22 2826 PL_doextract = FALSE;
1b24ed4b
MS
2827# ifdef IAMSUID /* actually, this is caught earlier */
2828 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2829# ifdef HAS_SETEUID
2830 (void)seteuid(PL_uid); /* musn't stay setuid root */
2831# else
2832# ifdef HAS_SETREUID
2833 (void)setreuid((Uid_t)-1, PL_uid);
2834# else
2835# ifdef HAS_SETRESUID
2836 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2837# else
2838 PerlProc_setuid(PL_uid);
2839# endif
2840# endif
2841# endif
b28d0864 2842 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2843 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805 2844 }
1b24ed4b 2845# endif /* IAMSUID */
0a6c758d 2846
62375a60
NIS
2847 DEBUG_P(PerlIO_printf(Perl_debug_log,
2848 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS
2849 SvPVX(cmd)));
2850
3280af22 2851 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c
PP
2852 SvREFCNT_dec(cmd);
2853 SvREFCNT_dec(cpp);
79072805
LW
2854 }
2855 else if (!*scriptname) {
bbce6d69 2856 forbid_setid("program input from stdin");
3280af22 2857 PL_rsfp = PerlIO_stdin();
79072805 2858 }
96436eeb 2859 else {
3280af22 2860 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS
2861# if defined(HAS_FCNTL) && defined(F_SETFD)
2862 if (PL_rsfp)
2863 /* ensure close-on-exec */
2864 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2865# endif
96436eeb 2866 }
3280af22 2867 if (!PL_rsfp) {
1b24ed4b
MS
2868# ifdef DOSUID
2869# ifndef IAMSUID /* in case script is not readable before setuid */
2870 if (PL_euid &&
2871 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
2872 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2873 {
2874 /* try again */
62375a60
NIS
2875 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT,
2876 BIN_EXP, (int)PERL_REVISION,
1b24ed4b
MS
2877 (int)PERL_VERSION,
2878 (int)PERL_SUBVERSION), PL_origargv);
2879 Perl_croak(aTHX_ "Can't do setuid\n");
2880 }
2881# endif
2882# endif
2883# ifdef IAMSUID
2884 errno = EPERM;
2885 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2886 Strerror(errno));
2887# else
2888 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
2889 CopFILE(PL_curcop), Strerror(errno));
2890# endif
13281fa4 2891 }
79072805 2892}
8d063cd8 2893
7b89560d
JH
2894/* Mention
2895 * I_SYSSTATVFS HAS_FSTATVFS
2896 * I_SYSMOUNT
c890dc6c 2897 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
2898 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2899 * here so that metaconfig picks them up. */
2900
104d25b7 2901#ifdef IAMSUID
864dbfa3 2902STATIC int
e688b231 2903S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2904{
0545a864
JH
2905 int check_okay = 0; /* able to do all the required sys/libcalls */
2906 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2907/*
ad27e871 2908 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2909 * fstatvfs() is UNIX98.
0545a864 2910 * fstatfs() is 4.3 BSD.
ad27e871 2911 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
2912 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2913 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
2914 */
2915
6439433f
JH
2916#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2917
2918# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2919 defined(HAS_FSTATVFS)
2920# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2921 struct statvfs stfs;
6439433f 2922
104d25b7
JH
2923 check_okay = fstatvfs(fd, &stfs) == 0;
2924 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2925# endif /* fstatvfs */
ac27b0f5 2926
6439433f
JH
2927# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2928 defined(PERL_MOUNT_NOSUID) && \
2929 defined(HAS_FSTATFS) && \
2930 defined(HAS_STRUCT_STATFS) && \
2931 defined(HAS_STRUCT_STATFS_F_FLAGS)
2932# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2933 struct statfs stfs;
6439433f 2934
104d25b7 2935 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2936 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH
2937# endif /* fstatfs */
2938
2939# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2940 defined(PERL_MOUNT_NOSUID) && \
2941 defined(HAS_FSTAT) && \
2942 defined(HAS_USTAT) && \
2943 defined(HAS_GETMNT) && \
2944 defined(HAS_STRUCT_FS_DATA) && \
2945 defined(NOSTAT_ONE)
2946# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2947 struct stat fdst;
6439433f 2948
0545a864 2949 if (fstat(fd, &fdst) == 0) {
6439433f
JH
2950 struct ustat us;
2951 if (ustat(fdst.st_dev, &us) == 0) {
2952 struct fs_data fsd;
2953 /* NOSTAT_ONE here because we're not examining fields which
2954 * vary between that case and STAT_ONE. */
ad27e871 2955 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
2956 size_t cmplen = sizeof(us.f_fname);
2957 if (sizeof(fsd.fd_req.path) < cmplen)
2958 cmplen = sizeof(fsd.fd_req.path);
2959 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2960 fdst.st_dev == fsd.fd_req.dev) {
2961 check_okay = 1;
2962 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2963 }
2964 }
2965 }
2966 }
0545a864 2967 }
6439433f
JH
2968# endif /* fstat+ustat+getmnt */
2969
2970# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2971 defined(HAS_GETMNTENT) && \
2972 defined(HAS_HASMNTOPT) && \
2973 defined(MNTOPT_NOSUID)
2974# define FD_ON_NOSUID_CHECK_OKAY
2975 FILE *mtab = fopen("/etc/mtab", "r");
2976 struct mntent *entry;
2977 struct stat stb, fsb;
104d25b7
JH
2978
2979 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
2980 while (entry = getmntent(mtab)) {
2981 if (stat(entry->mnt_dir, &fsb) == 0
2982 && fsb.st_dev == stb.st_dev)
2983 {
2984 /* found the filesystem */
2985 check_okay = 1;
2986 if (hasmntopt(entry, MNTOPT_NOSUID))
2987 on_nosuid = 1;
2988 break;
2989 } /* A single fs may well fail its stat(). */
2990 }
104d25b7
JH
2991 }
2992 if (mtab)
6439433f
JH
2993 fclose(mtab);
2994# endif /* getmntent+hasmntopt */
0545a864 2995
ac27b0f5 2996 if (!check_okay)
0545a864 2997 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH
2998 return on_nosuid;
2999}
3000#endif /* IAMSUID */
3001
76e3520e 3002STATIC void
cea2e8a9 3003S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 3004{
155aba94 3005#ifdef IAMSUID
96436eeb 3006 int which;
155aba94 3007#endif
96436eeb 3008
13281fa4
LW
3009 /* do we need to emulate setuid on scripts? */
3010
3011 /* This code is for those BSD systems that have setuid #! scripts disabled
3012 * in the kernel because of a security problem. Merely defining DOSUID
3013 * in perl will not fix that problem, but if you have disabled setuid
3014 * scripts in the kernel, this will attempt to emulate setuid and setgid
3015 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
3016 * root version must be called suidperl or sperlN.NNN. If regular perl
3017 * discovers that it has opened a setuid script, it calls suidperl with
3018 * the same argv that it had. If suidperl finds that the script it has
3019 * just opened is NOT setuid root, it sets the effective uid back to the
3020 * uid. We don't just make perl setuid root because that loses the
3021 * effective uid we had before invoking perl, if it was different from the
3022 * uid.
13281fa4
LW
3023 *
3024 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3025 * be defined in suidperl only. suidperl must be setuid root. The
3026 * Configure script will set this up for you if you want it.
3027 */
a687059c 3028
13281fa4 3029#ifdef DOSUID
6e72f9df 3030 char *s, *s2;
a0d0e21e 3031
b28d0864 3032 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 3033 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 3034 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 3035 I32 len;
2d8e6c8d 3036 STRLEN n_a;
13281fa4 3037
a687059c 3038#ifdef IAMSUID
fe14fcc3 3039#ifndef HAS_SETREUID
a687059c
LW
3040 /* On this access check to make sure the directories are readable,
3041 * there is actually a small window that the user could use to make
3042 * filename point to an accessible directory. So there is a faint
3043 * chance that someone could execute a setuid script down in a
3044 * non-accessible directory. I don't know what to do about that.
3045 * But I don't think it's too important. The manual lies when
3046 * it says access() is useful in setuid programs.
3047 */
cc49e20b 3048 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 3049 Perl_croak(aTHX_ "Permission denied");
a687059c
LW
3050#else
3051 /* If we can swap euid and uid, then we can determine access rights
3052 * with a simple stat of the file, and then compare device and
3053 * inode to make sure we did stat() on the same file we opened.
3054 * Then we just have to make sure he or she can execute it.
3055 */
3056 {
3057 struct stat tmpstatbuf;
3058
85e6fe83
LW
3059 if (
3060#ifdef HAS_SETREUID
b28d0864 3061 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW
3062#else
3063# if HAS_SETRESUID
b28d0864 3064 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 3065# endif
85e6fe83 3066#endif
b28d0864 3067 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 3068 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 3069 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 3070 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 3071#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 3072 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 3073 Perl_croak(aTHX_ "Permission denied");
104d25b7 3074#endif
b28d0864
NIS
3075 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3076 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3077 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3078 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3079 }
85e6fe83
LW
3080 if (
3081#ifdef HAS_SETREUID
b28d0864 3082 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW
3083#else
3084# if defined(HAS_SETRESUID)
b28d0864 3085 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3086# endif
85e6fe83 3087#endif
b28d0864 3088 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3089 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3090 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3091 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3092 }
fe14fcc3 3093#endif /* HAS_SETREUID */
a687059c
LW
3094#endif /* IAMSUID */
3095
b28d0864 3096 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3097 Perl_croak(aTHX_ "Permission denied");
b28d0864 3098 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3099 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3100 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3101 CopLINE_inc(PL_curcop);
6b88bc9c 3102 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3103 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3104 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3105 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3106 if (*s == ' ') s++;
45d8adaa 3107 while (!isSPACE(*s)) s++;
2d8e6c8d 3108 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df
PP
3109 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3110 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3111 Perl_croak(aTHX_ "Not a perl script");
a687059c 3112 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3113 /*
3114 * #! arg must be what we saw above. They can invoke it by
3115 * mentioning suidperl explicitly, but they may not add any strange
3116 * arguments beyond what #! says if they do invoke suidperl that way.
3117 */
3118 len = strlen(validarg);
3119 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3120 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3121 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW
3122
3123#ifndef IAMSUID
b28d0864
NIS
3124 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3125 PL_euid == PL_statbuf.st_uid)
3126 if (!PL_do_undump)
cea2e8a9 3127 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3128FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3129#endif /* IAMSUID */
13281fa4 3130
b28d0864
NIS
3131 if (PL_euid) { /* oops, we're not the setuid root perl */
3132 (void)PerlIO_close(PL_rsfp);
13281fa4 3133#ifndef IAMSUID
46fc3d4c 3134 /* try again */
a7cb1f99 3135 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3136 (int)PERL_REVISION, (int)PERL_VERSION,
3137 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3138#endif
cea2e8a9 3139 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
3140 }
3141
b28d0864 3142 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3143#ifdef HAS_SETEGID
b28d0864 3144 (void)setegid(PL_statbuf.st_gid);
a687059c 3145#else
fe14fcc3 3146#ifdef HAS_SETREGID
b28d0864 3147 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW
3148#else
3149#ifdef HAS_SETRESGID
b28d0864 3150 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3151#else
b28d0864 3152 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW
3153#endif
3154#endif
85e6fe83 3155#endif
b28d0864 3156 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3157 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3158 }
b28d0864
NIS
3159 if (PL_statbuf.st_mode & S_ISUID) {
3160 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3161#ifdef HAS_SETEUID
b28d0864 3162 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3163#else
fe14fcc3 3164#ifdef HAS_SETREUID
b28d0864 3165 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW
3166#else
3167#ifdef HAS_SETRESUID
b28d0864 3168 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3169#else
b28d0864 3170 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW
3171#endif
3172#endif
85e6fe83 3173#endif
b28d0864 3174 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3175 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3176 }
b28d0864 3177 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3178#ifdef HAS_SETEUID
b28d0864 3179 (void)seteuid((Uid_t)PL_uid);
a687059c 3180#else
fe14fcc3 3181#ifdef HAS_SETREUID
b28d0864 3182 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3183#else
85e6fe83 3184#ifdef HAS_SETRESUID
b28d0864 3185 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3186#else
b28d0864 3187 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3188#endif
a687059c
LW
3189#endif
3190#endif
b28d0864 3191 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3192 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3193 }
748a9306 3194 init_ids();
b28d0864 3195 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3196 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW
3197 }
3198#ifdef IAMSUID
6b88bc9c 3199 else if (PL_preprocess)
cea2e8a9 3200 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3201 else if (fdscript >= 0)
cea2e8a9 3202 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3203 else
cea2e8a9 3204 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb
PP
3205
3206 /* We absolutely must clear out any saved ids here, so we */
3207 /* exec the real perl, substituting fd script for scriptname. */
3208 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS
3209 PerlIO_rewind(PL_rsfp);
3210 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS
3211 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3212 if (!PL_origargv[which])
cea2e8a9
GS
3213 Perl_croak(aTHX_ "Permission denied");
3214 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3215 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3216#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3217 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3218#endif
a7cb1f99 3219 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3220 (int)PERL_REVISION, (int)PERL_VERSION,
3221 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3222 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3223#endif /* IAMSUID */
a687059c 3224#else /* !DOSUID */
3280af22 3225 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3226#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS
3227 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3228 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3229 ||
b28d0864 3230 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3231 )
b28d0864 3232 if (!PL_do_undump)
cea2e8a9 3233 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3234FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3235#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3236 /* not set-id, must be wrapped */
a687059c 3237 }
13281fa4 3238#endif /* DOSUID */
79072805 3239}
13281fa4 3240
76e3520e 3241STATIC void
cea2e8a9 3242S_find_beginning(pTHX)
79072805 3243{
6e72f9df 3244 register char *s, *s2;
33b78306
LW
3245
3246 /* skip forward in input to the real script? */
3247
bbce6d69 3248 forbid_setid("-x");
bf4acbe4 3249#ifdef MACOS_TRADITIONAL
084592ab 3250 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3251
bf4acbe4
GS
3252 while (PL_doextract || gMacPerl_AlwaysExtract) {
3253 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3254 if (!gMacPerl_AlwaysExtract)
3255 Perl_croak(aTHX_ "No Perl script found in input\n");
3256
3257 if (PL_doextract) /* require explicit override ? */
3258 if (!OverrideExtract(PL_origfilename))
3259 Perl_croak(aTHX_ "User aborted script\n");
3260 else
3261 PL_doextract = FALSE;
3262
3263 /* Pater peccavi, file does not have #! */
3264 PerlIO_rewind(PL_rsfp);
ac27b0f5 3265
bf4acbe4
GS
3266 break;
3267 }
3268#else
3280af22
NIS
3269 while (PL_doextract) {
3270 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3271 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3272#endif
4f0c37ba
IZ
3273 s2 = s;
3274 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS
3275 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3276 PL_doextract = FALSE;
6e72f9df
PP
3277 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3278 s2 = s;
3279 while (*s == ' ' || *s == '\t') s++;
3280 if (*s++ == '-') {
3281 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3282 if (strnEQ(s2-4,"perl",4))
3283 /*SUPPRESS 530*/
155aba94
GS
3284 while ((s = moreswitches(s)))
3285 ;
33b78306 3286 }
95e8664e
CN
3287#ifdef MACOS_TRADITIONAL
3288 break;
3289#endif
83025b21
LW
3290 }
3291 }
3292}
3293
afe37c7d 3294
76e3520e 3295STATIC void
cea2e8a9 3296S_init_ids(pTHX)
352d5a3a 3297{
d8eceb89
JH
3298 PL_uid = PerlProc_getuid();
3299 PL_euid = PerlProc_geteuid();
3300 PL_gid = PerlProc_getgid();
3301 PL_egid = PerlProc_getegid();
748a9306 3302#ifdef VMS
b28d0864
NIS
3303 PL_uid |= PL_gid << 16;
3304 PL_euid |= PL_egid << 16;
748a9306 3305#endif
3280af22 3306 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3307}
79072805 3308
76e3520e 3309STATIC void
cea2e8a9 3310S_forbid_setid(pTHX_ char *s)
bbce6d69 3311{
3280af22 3312 if (PL_euid != PL_uid)
cea2e8a9 3313 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3314 if (PL_egid != PL_gid)
cea2e8a9 3315 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69
PP
3316}
3317
1ee4443e
IZ
3318void
3319Perl_init_debugger(pTHX)
748a9306 3320{
1ee4443e
IZ
3321 HV *ostash = PL_curstash;
3322
3280af22
NIS
3323 PL_curstash = PL_debstash;
3324 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3325 AvREAL_off(PL_dbargs);
3326 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3327 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3328 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3329 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3330 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3331 sv_setiv(PL_DBsingle, 0);
3280af22 3332 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3333 sv_setiv(PL_DBtrace, 0);
3280af22 3334 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3335 sv_setiv(PL_DBsignal, 0);
1ee4443e 3336 PL_curstash = ostash;
352d5a3a
LW
3337}
3338
2ce36478
SM
3339#ifndef STRESS_REALLOC
3340#define REASONABLE(size) (size)
3341#else
3342#define REASONABLE(size) (1) /* unreasonable */
3343#endif
3344
11343788 3345void
cea2e8a9 3346Perl_init_stacks(pTHX)
79072805 3347{
e336de0d 3348 /* start with 128-item stack and 8K cxstack */
3280af22 3349 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3350 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS
3351 PL_curstackinfo->si_type = PERLSI_MAIN;
3352 PL_curstack = PL_curstackinfo->si_stack;
3353 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3354
3280af22
NIS
3355 PL_stack_base = AvARRAY(PL_curstack);
3356 PL_stack_sp = PL_stack_base;
3357 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3358
3280af22
NIS
3359 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3360 PL_tmps_floor = -1;
3361 PL_tmps_ix = -1;
3362 PL_tmps_max = REASONABLE(128);
8990e307 3363
3280af22
NIS
3364 New(54,PL_markstack,REASONABLE(32),I32);
3365 PL_markstack_ptr = PL_markstack;
3366 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3367
ce2f7c3b 3368 SET_MARK_OFFSET;
e336de0d 3369
3280af22
NIS
3370 New(54,PL_scopestack,REASONABLE(32),I32);
3371 PL_scopestack_ix = 0;
3372 PL_scopestack_max = REASONABLE(32);
79072805 3373
3280af22
NIS
3374 New(54,PL_savestack,REASONABLE(128),ANY);
3375 PL_savestack_ix = 0;
3376 PL_savestack_max = REASONABLE(128);
79072805 3377
3280af22
NIS
3378 New(54,PL_retstack,REASONABLE(16),OP*);
3379 PL_retstack_ix = 0;
3380 PL_retstack_max = REASONABLE(16);
378cc40b 3381}
33b78306 3382
2ce36478
SM
3383#undef REASONABLE
3384
76e3520e 3385STATIC void
cea2e8a9 3386S_nuke_stacks(pTHX)
6e72f9df 3387{
3280af22
NIS
3388 while (PL_curstackinfo->si_next)
3389 PL_curstackinfo = PL_curstackinfo->si_next;
3390 while (PL_curstackinfo) {
3391 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3392 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS
3393 Safefree(PL_curstackinfo->si_cxstack);
3394 Safefree(PL_curstackinfo);
3395 PL_curstackinfo = p;
e336de0d 3396 }
3280af22
NIS
3397 Safefree(PL_tmps_stack);
3398 Safefree(PL_markstack);
3399 Safefree(PL_scopestack);
3400 Safefree(PL_savestack);
3401 Safefree(PL_retstack);
378cc40b 3402}
33b78306 3403
76e3520e 3404STATIC void
cea2e8a9 3405S_init_lexer(pTHX)
8990e307 3406{
06039172 3407 PerlIO *tmpfp;
3280af22
NIS
3408 tmpfp = PL_rsfp;
3409 PL_rsfp = Nullfp;
3410 lex_start(PL_linestr);
3411 PL_rsfp = tmpfp;
79cb57f6 3412 PL_subname = newSVpvn("main",4);
8990e307
LW
3413}
3414
76e3520e 3415STATIC void
cea2e8a9 3416S_init_predump_symbols(pTHX)
45d8adaa 3417{
93a17b20 3418 GV *tmpgv;
af8c498a 3419 IO *io;
79072805 3420
864dbfa3 3421 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS
3422 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3423 GvMULTI_on(PL_stdingv);
af8c498a 3424 io = GvIOp(PL_stdingv);
a04651f4 3425 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3426 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3427 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3428 GvMULTI_on(tmpgv);
af8c498a 3429 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3430
85e6fe83 3431 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3432 GvMULTI_on(tmpgv);
af8c498a 3433 io = GvIOp(tmpgv);
a04651f4 3434 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3435 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3436 setdefout(tmpgv);
adbc6bb1 3437 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3438 GvMULTI_on(tmpgv);
af8c498a 3439 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3440
bf49b057
GS
3441 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3442 GvMULTI_on(PL_stderrgv);
3443 io = GvIOp(PL_stderrgv);
a04651f4 3444 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3445 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3446 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3447 GvMULTI_on(tmpgv);
af8c498a 3448 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3449
3280af22 3450 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3451
bf4acbe4
GS
3452 if (PL_osname)
3453 Safefree(PL_osname);
3454 PL_osname = savepv(OSNAME);
79072805 3455}
33b78306 3456
a11ec5a9
RGS
3457void
3458Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
33b78306 3459{
79072805 3460 char *s;
79072805 3461 argc--,argv++; /* skip name of script */
3280af22 3462 if (PL_doswitches) {
79072805
LW
3463 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3464 if (!argv[0][1])
3465 break;
379d538a 3466 if (argv[0][1] == '-' && !argv[0][2]) {