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[perl5.git] / perl.c
CommitLineData
a0d0e21e
LW
1/* perl.c
2 *
bc89e66f 3 * Copyright (c) 1987-2001 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
LW
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
54310121 24#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
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/*
105=for apidoc perl_alloc
106
107Allocates a new Perl interpreter. See L<perlembed>.
108
109=cut
110*/
111
93a17b20 112PerlInterpreter *
cea2e8a9 113perl_alloc(void)
79072805 114{
cea2e8a9 115 PerlInterpreter *my_perl;
79072805 116
54aff467 117 /* New() needs interpreter, so call malloc() instead */
e8ee3774 118 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 119
06d86050 120 INIT_TLS_AND_INTERP;
dedcbb81 121 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 122 return my_perl;
79072805 123}
32e30700 124#endif /* PERL_IMPLICIT_SYS */
79072805 125
954c1994
GS
126/*
127=for apidoc perl_construct
128
129Initializes a new Perl interpreter. See L<perlembed>.
130
131=cut
132*/
133
79072805 134void
0cb96387 135perl_construct(pTHXx)
79072805 136{
4d1ff10f 137#ifdef USE_5005THREADS
a863c7d1 138#ifndef FAKE_THREADS
e1f15930 139 struct perl_thread *thr = NULL;
a863c7d1 140#endif /* FAKE_THREADS */
4d1ff10f 141#endif /* USE_5005THREADS */
ba869deb 142
8990e307 143#ifdef MULTIPLICITY
54aff467 144 init_interp();
ac27b0f5 145 PL_perl_destruct_level = 1;
54aff467
GS
146#else
147 if (PL_perl_destruct_level > 0)
148 init_interp();
149#endif
150
33f46ff6 151 /* Init the real globals (and main thread)? */
3280af22 152 if (!PL_linestr) {
4d1ff10f 153#ifdef USE_5005THREADS
533c011a 154 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB
155 /*
156 * Safe to use basic SV functions from now on (though
157 * not things like mortals or tainting yet).
158 */
533c011a
NIS
159 MUTEX_INIT(&PL_eval_mutex);
160 COND_INIT(&PL_eval_cond);
161 MUTEX_INIT(&PL_threads_mutex);
162 COND_INIT(&PL_nthreads_cond);
ba869deb 163# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 164 MUTEX_INIT(&PL_svref_mutex);
ba869deb 165# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 166
5ff3f7a4 167 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS
168 MUTEX_INIT(&PL_sv_lock_mutex);
169 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 170
199100c8 171 thr = init_main_thread();
4d1ff10f 172#endif /* USE_5005THREADS */
11343788 173
14dd3ad8 174#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 175 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 176#endif
312caa8e 177
2aea9f8a
GS
178 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
179
3280af22
NIS
180 PL_linestr = NEWSV(65,79);
181 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 182
3280af22 183 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP
184 /* set read-only and try to insure than we wont see REFCNT==0
185 very often */
186
3280af22
NIS
187 SvREADONLY_on(&PL_sv_undef);
188 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 189
3280af22
NIS
190 sv_setpv(&PL_sv_no,PL_No);
191 SvNV(&PL_sv_no);
192 SvREADONLY_on(&PL_sv_no);
193 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 194
3280af22
NIS
195 sv_setpv(&PL_sv_yes,PL_Yes);
196 SvNV(&PL_sv_yes);
197 SvREADONLY_on(&PL_sv_yes);
198 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 199 }
79072805 200
cea2e8a9 201 PL_sighandlerp = Perl_sighandler;
3280af22 202 PL_pidstatus = newHV();
44a8e56a 203
79072805
LW
204#ifdef MSDOS
205 /*
206 * There is no way we can refer to them from Perl so close them to save
207 * space. The other alternative would be to provide STDAUX and STDPRN
208 * filehandles.
209 */
2b96b0a5
JH
210 (void)PerlIO_close(PerlIO_importFILE(stdaux, 0));
211 (void)PerlIO_close(PerlIO_importFILE(stdprn, 0));
79072805
LW
212#endif
213 }
214
8bfdd7d9 215 PL_rs = newSVpvn("\n", 1);
dc92893f 216
cea2e8a9 217 init_stacks();
79072805 218
748a9306 219 init_ids();
3280af22 220 PL_lex_state = LEX_NOTPARSING;
a5f75d66 221
312caa8e 222 JMPENV_BOOTSTRAP;
f86702cc
PP
223 STATUS_ALL_SUCCESS;
224
0672f40e 225 init_i18nl10n(1);
36477c24 226 SET_NUMERIC_STANDARD();
0b5b802d 227
a7cb1f99
GS
228 {
229 U8 *s;
230 PL_patchlevel = NEWSV(0,4);
155aba94 231 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 232 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 233 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 234 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS
235 /* Build version strings using "native" characters */
236 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
237 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
238 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS
239 *s = '\0';
240 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
241 SvPOK_on(PL_patchlevel);
242 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
243 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 244#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 245 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 246#endif
a7cb1f99
GS
247 ;
248 SvNOK_on(PL_patchlevel); /* dual valued */
249 SvUTF8_on(PL_patchlevel);
250 SvREADONLY_on(PL_patchlevel);
251 }
79072805 252
ab821d7f 253#if defined(LOCAL_PATCH_COUNT)
3280af22 254 PL_localpatches = local_patches; /* For possible -v */
ab821d7f
PP
255#endif
256
52853b95
GS
257#ifdef HAVE_INTERP_INTERN
258 sys_intern_init();
259#endif
260
4b556e6c 261 PerlIO_init(); /* Hook to IO system */
760ac839 262
3280af22
NIS
263 PL_fdpid = newAV(); /* for remembering popen pids by fd */
264 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 265 PL_errors = newSVpvn("",0);
1fcf4c12 266#ifdef USE_ITHREADS
13137afc
AB
267 PL_regex_padav = newAV();
268 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
269 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 270#endif
e5dd39fc
AB
271#ifdef USE_REENTRANT_API
272 New(31337, PL_reentrant_buffer,1, REBUF);
273 New(31337, PL_reentrant_buffer->tmbuff,1, struct tm);
274#endif
3d47000e
AB
275
276 /* Note that strtab is a rather special HV. Assumptions are made
277 about not iterating on it, and not adding tie magic to it.
278 It is properly deallocated in perl_destruct() */
279 PL_strtab = newHV();
280
281#ifdef USE_5005THREADS
282 MUTEX_INIT(&PL_strtab_mutex);
283#endif
284 HvSHAREKEYS_off(PL_strtab); /* mandatory */
285 hv_ksplit(PL_strtab, 512);
286
0631ea03
AB
287#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
288 _dyld_lookup_and_bind
289 ("__environ", (unsigned long *) &environ_pointer, NULL);
290#endif /* environ */
291
292#ifdef USE_ENVIRON_ARRAY
293 PL_origenviron = environ;
294#endif
295
8990e307 296 ENTER;
79072805
LW
297}
298
954c1994
GS
299/*
300=for apidoc perl_destruct
301
302Shuts down a Perl interpreter. See L<perlembed>.
303
304=cut
305*/
306
31d77e54 307int
0cb96387 308perl_destruct(pTHXx)
79072805 309{
7c474504 310 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 311 HV *hv;
4d1ff10f 312#ifdef USE_5005THREADS
33f46ff6 313 Thread t;
cea2e8a9 314 dTHX;
4d1ff10f 315#endif /* USE_5005THREADS */
8990e307 316
7766f137
GS
317 /* wait for all pseudo-forked children to finish */
318 PERL_WAIT_FOR_CHILDREN;
319
4d1ff10f 320#ifdef USE_5005THREADS
0f15f207 321#ifndef FAKE_THREADS
8023c3ce
MB
322 /* Pass 1 on any remaining threads: detach joinables, join zombies */
323 retry_cleanup:
533c011a 324 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 325 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 326 "perl_destruct: waiting for %d threads...\n",
533c011a 327 PL_nthreads - 1));
33f46ff6 328 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB
329 MUTEX_LOCK(&t->mutex);
330 switch (ThrSTATE(t)) {
331 AV *av;
c7848ba1 332 case THRf_ZOMBIE:
bf49b057 333 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 334 "perl_destruct: joining zombie %p\n", t));
605e5515
MB
335 ThrSETSTATE(t, THRf_DEAD);
336 MUTEX_UNLOCK(&t->mutex);
533c011a 337 PL_nthreads--;
8023c3ce
MB
338 /*
339 * The SvREFCNT_dec below may take a long time (e.g. av
340 * may contain an object scalar whose destructor gets
341 * called) so we have to unlock threads_mutex and start
342 * all over again.
343 */
533c011a 344 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 345 JOIN(t, &av);
605e5515 346 SvREFCNT_dec((SV*)av);
bf49b057 347 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 348 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 349 goto retry_cleanup;
c7848ba1 350 case THRf_R_JOINABLE:
bf49b057 351 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
352 "perl_destruct: detaching thread %p\n", t));
353 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 354 /*
c7848ba1
MB
355 * We unlock threads_mutex and t->mutex in the opposite order
356 * from which we locked them just so that DETACH won't
357 * deadlock if it panics. It's only a breach of good style
358 * not a bug since they are unlocks not locks.
359 */
533c011a 360 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB
361 DETACH(t);
362 MUTEX_UNLOCK(&t->mutex);
8023c3ce 363 goto retry_cleanup;
c7848ba1 364 default:
bf49b057 365 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
366 "perl_destruct: ignoring %p (state %u)\n",
367 t, ThrSTATE(t)));
368 MUTEX_UNLOCK(&t->mutex);
c7848ba1 369 /* fall through and out */
33f46ff6
MB
370 }
371 }
8023c3ce
MB
372 /* We leave the above "Pass 1" loop with threads_mutex still locked */
373
374 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 375 while (PL_nthreads > 1)
11343788 376 {
bf49b057 377 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 378 "perl_destruct: final wait for %d threads\n",
533c011a
NIS
379 PL_nthreads - 1));
380 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB
381 }
382 /* At this point, we're the last thread */
533c011a 383 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 384 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS
385 MUTEX_DESTROY(&PL_threads_mutex);
386 COND_DESTROY(&PL_nthreads_cond);
b57a092c 387 PL_nthreads--;
0f15f207 388#endif /* !defined(FAKE_THREADS) */
4d1ff10f 389#endif /* USE_5005THREADS */
11343788 390
3280af22 391 destruct_level = PL_perl_destruct_level;
4633a7c4
LW
392#ifdef DEBUGGING
393 {
394 char *s;
155aba94 395 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc
PP
396 int i = atoi(s);
397 if (destruct_level < i)
398 destruct_level = i;
399 }
4633a7c4
LW
400 }
401#endif
402
31d77e54
AB
403
404 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB
405 dJMPENV;
406 int x = 0;
407
408 JMPENV_PUSH(x);
409 if (PL_endav && !PL_minus_c)
410 call_list(PL_scopestack_ix, PL_endav);
411 JMPENV_POP;
26f423df 412 }
f3faeb53 413 LEAVE;
a0d0e21e
LW
414 FREETMPS;
415
ff0cee69
PP
416 /* We must account for everything. */
417
418 /* Destroy the main CV and syntax tree */
3280af22
NIS
419 if (PL_main_root) {
420 PL_curpad = AvARRAY(PL_comppad);
421 op_free(PL_main_root);
422 PL_main_root = Nullop;
a0d0e21e 423 }
3280af22
NIS
424 PL_curcop = &PL_compiling;
425 PL_main_start = Nullop;
426 SvREFCNT_dec(PL_main_cv);
427 PL_main_cv = Nullcv;
24d3c518 428 PL_dirty = TRUE;
ff0cee69 429
13621cfb
NIS
430 /* Tell PerlIO we are about to tear things apart in case
431 we have layers which are using resources that should
432 be cleaned up now.
433 */
434
435 PerlIO_destruct(aTHX);
436
3280af22 437 if (PL_sv_objcount) {
a0d0e21e
LW
438 /*
439 * Try to destruct global references. We do this first so that the
440 * destructors and destructees still exist. Some sv's might remain.
441 * Non-referenced objects are on their own.
442 */
a0d0e21e 443 sv_clean_objs();
8990e307
LW
444 }
445
5cd24f17 446 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
447 SvREFCNT_dec(PL_warnhook);
448 PL_warnhook = Nullsv;
449 SvREFCNT_dec(PL_diehook);
450 PL_diehook = Nullsv;
5cd24f17 451
4b556e6c 452 /* call exit list functions */
3280af22 453 while (PL_exitlistlen-- > 0)
acfe0abc 454 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 455
3280af22 456 Safefree(PL_exitlist);
4b556e6c 457
a0d0e21e 458 if (destruct_level == 0){
8990e307 459
a0d0e21e 460 DEBUG_P(debprofdump());
ac27b0f5 461
a0d0e21e 462 /* The exit() function will do everything that needs doing. */
31d77e54 463 return STATUS_NATIVE_EXPORT;;
a0d0e21e 464 }
5dd60ef7 465
551a8b83
JH
466 /* jettison our possibly duplicated environment */
467
468#ifdef USE_ENVIRON_ARRAY
469 if (environ != PL_origenviron) {
470 I32 i;
471
472 for (i = 0; environ[i]; i++)
4b420006 473 safesysfree(environ[i]);
0631ea03 474
4b420006
JH
475 /* Must use safesysfree() when working with environ. */
476 safesysfree(environ);
551a8b83
JH
477
478 environ = PL_origenviron;
479 }
480#endif
481
5f8cb046
DM
482#ifdef USE_ITHREADS
483 /* the syntax tree is shared between clones
484 * so op_free(PL_main_root) only ReREFCNT_dec's
485 * REGEXPs in the parent interpreter
486 * we need to manually ReREFCNT_dec for the clones
487 */
488 {
489 I32 i = AvFILLp(PL_regex_padav) + 1;
490 SV **ary = AvARRAY(PL_regex_padav);
491
492 while (i) {
35061a7e 493 SV *resv = ary[--i];
ba89bb6e 494 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM
495
496 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 497 /* this is PL_reg_curpm, already freed
35061a7e
DM
498 * flag is set in regexec.c:S_regtry
499 */
500 SvFLAGS(resv) &= ~SVf_BREAK;
1cc8b4c5
AB
501 }
502 else if(SvREPADTMP(resv)) {
503 SvREPADTMP_off(resv);
504 }
35061a7e 505 else {
5f8cb046
DM
506 ReREFCNT_dec(re);
507 }
508 }
509 }
510 SvREFCNT_dec(PL_regex_padav);
511 PL_regex_padav = Nullav;
512 PL_regex_pad = NULL;
513#endif
514
5f05dabc
PP
515 /* loosen bonds of global variables */
516
3280af22
NIS
517 if(PL_rsfp) {
518 (void)PerlIO_close(PL_rsfp);
519 PL_rsfp = Nullfp;
8ebc5c01
PP
520 }
521
522 /* Filters for program text */
3280af22
NIS
523 SvREFCNT_dec(PL_rsfp_filters);
524 PL_rsfp_filters = Nullav;
8ebc5c01
PP
525
526 /* switches */
3280af22
NIS
527 PL_preprocess = FALSE;
528 PL_minus_n = FALSE;
529 PL_minus_p = FALSE;
530 PL_minus_l = FALSE;
531 PL_minus_a = FALSE;
532 PL_minus_F = FALSE;
533 PL_doswitches = FALSE;
599cee73 534 PL_dowarn = G_WARN_OFF;
3280af22
NIS
535 PL_doextract = FALSE;
536 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
537 PL_unsafe = FALSE;
538
539 Safefree(PL_inplace);
540 PL_inplace = Nullch;
a7cb1f99 541 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
542
543 if (PL_e_script) {
544 SvREFCNT_dec(PL_e_script);
545 PL_e_script = Nullsv;
8ebc5c01
PP
546 }
547
bc0a45ed
DM
548 while (--PL_origargc >= 0) {
549 Safefree(PL_origargv[PL_origargc]);
550 }
551 Safefree(PL_origargv);
552
8ebc5c01
PP
553 /* magical thingies */
554
7889fe52
NIS
555 SvREFCNT_dec(PL_ofs_sv); /* $, */
556 PL_ofs_sv = Nullsv;
5f05dabc 557
7889fe52
NIS
558 SvREFCNT_dec(PL_ors_sv); /* $\ */
559 PL_ors_sv = Nullsv;
8ebc5c01 560
3280af22
NIS
561 SvREFCNT_dec(PL_rs); /* $/ */
562 PL_rs = Nullsv;
dc92893f 563
d33b2eba
GS
564 PL_multiline = 0; /* $* */
565 Safefree(PL_osname); /* $^O */
566 PL_osname = Nullch;
5f05dabc 567
3280af22
NIS
568 SvREFCNT_dec(PL_statname);
569 PL_statname = Nullsv;
570 PL_statgv = Nullgv;
5f05dabc 571
8ebc5c01
PP
572 /* defgv, aka *_ should be taken care of elsewhere */
573
8ebc5c01 574 /* clean up after study() */
3280af22
NIS
575 SvREFCNT_dec(PL_lastscream);
576 PL_lastscream = Nullsv;
577 Safefree(PL_screamfirst);
578 PL_screamfirst = 0;
579 Safefree(PL_screamnext);
580 PL_screamnext = 0;
8ebc5c01 581
7d5ea4e7
GS
582 /* float buffer */
583 Safefree(PL_efloatbuf);
584 PL_efloatbuf = Nullch;
585 PL_efloatsize = 0;
586
8ebc5c01 587 /* startup and shutdown function lists */
3280af22 588 SvREFCNT_dec(PL_beginav);
5a837c8f 589 SvREFCNT_dec(PL_beginav_save);
3280af22 590 SvREFCNT_dec(PL_endav);
7d30b5c4 591 SvREFCNT_dec(PL_checkav);
3280af22
NIS
592 SvREFCNT_dec(PL_initav);
593 PL_beginav = Nullav;
5a837c8f 594 PL_beginav_save = Nullav;
3280af22 595 PL_endav = Nullav;
7d30b5c4 596 PL_checkav = Nullav;
3280af22 597 PL_initav = Nullav;
5618dfe8 598
8ebc5c01 599 /* shortcuts just get cleared */
3280af22 600 PL_envgv = Nullgv;
3280af22
NIS
601 PL_incgv = Nullgv;
602 PL_hintgv = Nullgv;
603 PL_errgv = Nullgv;
604 PL_argvgv = Nullgv;
605 PL_argvoutgv = Nullgv;
606 PL_stdingv = Nullgv;
bf49b057 607 PL_stderrgv = Nullgv;
3280af22
NIS
608 PL_last_in_gv = Nullgv;
609 PL_replgv = Nullgv;
5c831c24 610 PL_debstash = Nullhv;
8ebc5c01
PP
611
612 /* reset so print() ends up where we expect */
613 setdefout(Nullgv);
5c831c24 614
7a1c5554
GS
615 SvREFCNT_dec(PL_argvout_stack);
616 PL_argvout_stack = Nullav;
8ebc5c01 617
5c831c24
GS
618 SvREFCNT_dec(PL_modglobal);
619 PL_modglobal = Nullhv;
620 SvREFCNT_dec(PL_preambleav);
621 PL_preambleav = Nullav;
622 SvREFCNT_dec(PL_subname);
623 PL_subname = Nullsv;
624 SvREFCNT_dec(PL_linestr);
625 PL_linestr = Nullsv;
626 SvREFCNT_dec(PL_pidstatus);
627 PL_pidstatus = Nullhv;
628 SvREFCNT_dec(PL_toptarget);
629 PL_toptarget = Nullsv;
630 SvREFCNT_dec(PL_bodytarget);
631 PL_bodytarget = Nullsv;
632 PL_formtarget = Nullsv;
633
d33b2eba 634 /* free locale stuff */
b9582b6a 635#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
636 Safefree(PL_collation_name);
637 PL_collation_name = Nullch;
b9582b6a 638#endif
d33b2eba 639
b9582b6a 640#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
641 Safefree(PL_numeric_name);
642 PL_numeric_name = Nullch;
a453c169 643 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 644#endif
d33b2eba 645
5c831c24
GS
646 /* clear utf8 character classes */
647 SvREFCNT_dec(PL_utf8_alnum);
648 SvREFCNT_dec(PL_utf8_alnumc);
649 SvREFCNT_dec(PL_utf8_ascii);
650 SvREFCNT_dec(PL_utf8_alpha);
651 SvREFCNT_dec(PL_utf8_space);
652 SvREFCNT_dec(PL_utf8_cntrl);
653 SvREFCNT_dec(PL_utf8_graph);
654 SvREFCNT_dec(PL_utf8_digit);
655 SvREFCNT_dec(PL_utf8_upper);
656 SvREFCNT_dec(PL_utf8_lower);
657 SvREFCNT_dec(PL_utf8_print);
658 SvREFCNT_dec(PL_utf8_punct);
659 SvREFCNT_dec(PL_utf8_xdigit);
660 SvREFCNT_dec(PL_utf8_mark);
661 SvREFCNT_dec(PL_utf8_toupper);
662 SvREFCNT_dec(PL_utf8_tolower);
663 PL_utf8_alnum = Nullsv;
664 PL_utf8_alnumc = Nullsv;
665 PL_utf8_ascii = Nullsv;
666 PL_utf8_alpha = Nullsv;
667 PL_utf8_space = Nullsv;
668 PL_utf8_cntrl = Nullsv;
669 PL_utf8_graph = Nullsv;
670 PL_utf8_digit = Nullsv;
671 PL_utf8_upper = Nullsv;
672 PL_utf8_lower = Nullsv;
673 PL_utf8_print = Nullsv;
674 PL_utf8_punct = Nullsv;
675 PL_utf8_xdigit = Nullsv;
676 PL_utf8_mark = Nullsv;
677 PL_utf8_toupper = Nullsv;
678 PL_utf8_totitle = Nullsv;
679 PL_utf8_tolower = Nullsv;
680
971a9dd3
GS
681 if (!specialWARN(PL_compiling.cop_warnings))
682 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 683 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
684 if (!specialCopIO(PL_compiling.cop_io))
685 SvREFCNT_dec(PL_compiling.cop_io);
686 PL_compiling.cop_io = Nullsv;
f4dd75d9
GS
687#ifdef USE_ITHREADS
688 Safefree(CopFILE(&PL_compiling));
689 CopFILE(&PL_compiling) = Nullch;
690 Safefree(CopSTASHPV(&PL_compiling));
691#else
01724ea0 692 SvREFCNT_dec(CopFILEGV(&PL_compiling));
f4dd75d9
GS
693 CopFILEGV(&PL_compiling) = Nullgv;
694 /* cop_stash is not refcounted */
01724ea0 695#endif
5c831c24 696
a0d0e21e 697 /* Prepare to destruct main symbol table. */
5f05dabc 698
3280af22
NIS
699 hv = PL_defstash;
700 PL_defstash = 0;
a0d0e21e 701 SvREFCNT_dec(hv);
5c831c24
GS
702 SvREFCNT_dec(PL_curstname);
703 PL_curstname = Nullsv;
a0d0e21e 704
5a844595
GS
705 /* clear queued errors */
706 SvREFCNT_dec(PL_errors);
707 PL_errors = Nullsv;
708
a0d0e21e 709 FREETMPS;
0453d815 710 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 711 if (PL_scopestack_ix != 0)
0453d815
PM
712 Perl_warner(aTHX_ WARN_INTERNAL,
713 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
714 (long)PL_scopestack_ix);
715 if (PL_savestack_ix != 0)
0453d815
PM
716 Perl_warner(aTHX_ WARN_INTERNAL,
717 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
718 (long)PL_savestack_ix);
719 if (PL_tmps_floor != -1)
0453d815 720 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 721 (long)PL_tmps_floor + 1);
a0d0e21e 722 if (cxstack_ix != -1)
0453d815 723 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 724 (long)cxstack_ix + 1);
a0d0e21e 725 }
8990e307
LW
726
727 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 728 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 729 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
730
731 /* the 2 is for PL_fdpid and PL_strtab */
732 while (PL_sv_count > 2 && sv_clean_all())
733 ;
734
d33b2eba
GS
735 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
736 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
737 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
738 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 739
d4777f27
GS
740 AvREAL_off(PL_fdpid); /* no surviving entries */
741 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
742 PL_fdpid = Nullav;
743
6c644e78
GS
744#ifdef HAVE_INTERP_INTERN
745 sys_intern_clear();
746#endif
747
6e72f9df
PP
748 /* Destruct the global string table. */
749 {
750 /* Yell and reset the HeVAL() slots that are still holding refcounts,
751 * so that sv_free() won't fail on them.
752 */
753 I32 riter;
754 I32 max;
755 HE *hent;
756 HE **array;
757
758 riter = 0;
3280af22
NIS
759 max = HvMAX(PL_strtab);
760 array = HvARRAY(PL_strtab);
6e72f9df
PP
761 hent = array[0];
762 for (;;) {
0453d815
PM
763 if (hent && ckWARN_d(WARN_INTERNAL)) {
764 Perl_warner(aTHX_ WARN_INTERNAL,
765 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
766 HeVAL(hent) - Nullsv, HeKEY(hent));
767 HeVAL(hent) = Nullsv;
768 hent = HeNEXT(hent);
769 }
770 if (!hent) {
771 if (++riter > max)
772 break;
773 hent = array[riter];
774 }
775 }
776 }
3280af22 777 SvREFCNT_dec(PL_strtab);
6e72f9df 778
e652bb2f 779#ifdef USE_ITHREADS
a0739874
DM
780 /* free the pointer table used for cloning */
781 ptr_table_free(PL_ptr_table);
53186e96 782#endif
a0739874 783
d33b2eba
GS
784 /* free special SVs */
785
786 SvREFCNT(&PL_sv_yes) = 0;
787 sv_clear(&PL_sv_yes);
788 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 789 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
790
791 SvREFCNT(&PL_sv_no) = 0;
792 sv_clear(&PL_sv_no);
793 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 794 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS
795
796 SvREFCNT(&PL_sv_undef) = 0;
797 SvREADONLY_off(&PL_sv_undef);
d33b2eba 798
0453d815
PM
799 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
800 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 801
3280af22 802 Safefree(PL_origfilename);
3280af22 803 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ
804 if (PL_reg_curpm)
805 Safefree(PL_reg_curpm);
82ba1be6 806 Safefree(PL_reg_poscache);
3280af22
NIS
807 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
808 Safefree(PL_op_mask);
cf36064f
GS
809 Safefree(PL_psig_ptr);
810 Safefree(PL_psig_name);
2c2666fc 811 Safefree(PL_bitcount);
ce08f86c 812 Safefree(PL_psig_pend);
6e72f9df 813 nuke_stacks();
3280af22 814 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 815
a0d0e21e 816 DEBUG_P(debprofdump());
4d1ff10f 817#ifdef USE_5005THREADS
5f08fbcd 818 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS
819 MUTEX_DESTROY(&PL_sv_mutex);
820 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 821 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 822 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 823 COND_DESTROY(&PL_eval_cond);
11d617a5
GS
824#ifdef EMULATE_ATOMIC_REFCOUNTS
825 MUTEX_DESTROY(&PL_svref_mutex);
826#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 827
8023c3ce 828 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS
829 Safefree(SvPVX(PL_thrsv));
830 Safefree(SvANY(PL_thrsv));
831 Safefree(PL_thrsv);
832 PL_thrsv = Nullsv;
4d1ff10f 833#endif /* USE_5005THREADS */
d33b2eba 834
e5dd39fc
AB
835#ifdef USE_REENTRANT_API
836 Safefree(PL_reentrant_buffer->tmbuff);
837 Safefree(PL_reentrant_buffer);
838#endif
839
612f20c3
GS
840 sv_free_arenas();
841
fc36a67e
PP
842 /* As the absolutely last thing, free the non-arena SV for mess() */
843
3280af22 844 if (PL_mess_sv) {
9c63abab
GS
845 /* it could have accumulated taint magic */
846 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
847 MAGIC* mg;
848 MAGIC* moremagic;
849 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
850 moremagic = mg->mg_moremagic;
14befaf4
DM
851 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
852 && mg->mg_len >= 0)
9c63abab
GS
853 Safefree(mg->mg_ptr);
854 Safefree(mg);
855 }
856 }
fc36a67e 857 /* we know that type >= SVt_PV */
155aba94 858 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS
859 Safefree(SvPVX(PL_mess_sv));
860 Safefree(SvANY(PL_mess_sv));
861 Safefree(PL_mess_sv);
862 PL_mess_sv = Nullsv;
fc36a67e 863 }
31d77e54 864 return STATUS_NATIVE_EXPORT;
79072805
LW
865}
866
954c1994
GS
867/*
868=for apidoc perl_free
869
870Releases a Perl interpreter. See L<perlembed>.
871
872=cut
873*/
874
79072805 875void
0cb96387 876perl_free(pTHXx)
79072805 877{
acfe0abc 878#if defined(WIN32) || defined(NETWARE)
ce3e5b80 879# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
880# ifdef NETWARE
881 void *host = nw_internal_host;
882# else
883 void *host = w32_internal_host;
884# endif
885# ifndef NETWARE
886 if (PerlProc_lasthost()) {
6ea0e807 887# ifdef USE_PERLIO
ce08f86c 888 PerlIO_cleanup();
6ea0e807 889# endif
acfe0abc
GS
890 }
891# endif
ce3e5b80 892 PerlMem_free(aTHXx);
acfe0abc
GS
893# ifdef NETWARE
894 nw5_delete_internal_host(host);
895# else
896 win32_delete_internal_host(host);
897# endif
1c0ca838 898# else
6ea0e807 899# ifdef USE_PERLIO
acfe0abc 900 PerlIO_cleanup();
6ea0e807 901# endif
1c0ca838
GS
902 PerlMem_free(aTHXx);
903# endif
acfe0abc
GS
904#else
905 PerlMem_free(aTHXx);
76e3520e 906#endif
79072805
LW
907}
908
4b556e6c 909void
864dbfa3 910Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 911{
3280af22
NIS
912 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
913 PL_exitlist[PL_exitlistlen].fn = fn;
914 PL_exitlist[PL_exitlistlen].ptr = ptr;
915 ++PL_exitlistlen;
4b556e6c
JD
916}
917
954c1994
GS
918/*
919=for apidoc perl_parse
920
921Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
922
923=cut
924*/
925
79072805 926int
0cb96387 927perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 928{
6224f72b 929 I32 oldscope;
6224f72b 930 int ret;
db36c5a1 931 dJMPENV;
4d1ff10f 932#ifdef USE_5005THREADS
cea2e8a9
GS
933 dTHX;
934#endif
8d063cd8 935
a687059c
LW
936#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
937#ifdef IAMSUID
938#undef IAMSUID
cea2e8a9 939 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW
940setuid perl scripts securely.\n");
941#endif
942#endif
943
3280af22 944 PL_origargc = argc;
bc0a45ed
DM
945 {
946 /* we copy rather than point to argv
947 * since perl_clone will copy and perl_destruct
948 * has no way of knowing if we've made a copy or
949 * just point to argv
950 */
951 int i = PL_origargc;
952 New(0, PL_origargv, i+1, char*);
953 PL_origargv[i] = '\0';
954 while (i-- > 0) {
955 PL_origargv[i] = savepv(argv[i]);
956 }
957 }
958
0631ea03 959
a0d0e21e 960
3280af22 961 if (PL_do_undump) {
a0d0e21e
LW
962
963 /* Come here if running an undumped a.out. */
964
3280af22
NIS
965 PL_origfilename = savepv(argv[0]);
966 PL_do_undump = FALSE;
a0d0e21e 967 cxstack_ix = -1; /* start label stack again */
748a9306 968 init_ids();
a0d0e21e
LW
969 init_postdump_symbols(argc,argv,env);
970 return 0;
971 }
972
3280af22
NIS
973 if (PL_main_root) {
974 PL_curpad = AvARRAY(PL_comppad);
975 op_free(PL_main_root);
976 PL_main_root = Nullop;
ff0cee69 977 }
3280af22
NIS
978 PL_main_start = Nullop;
979 SvREFCNT_dec(PL_main_cv);
980 PL_main_cv = Nullcv;
79072805 981
3280af22
NIS
982 time(&PL_basetime);
983 oldscope = PL_scopestack_ix;
599cee73 984 PL_dowarn = G_WARN_OFF;
f86702cc 985
14dd3ad8
GS
986#ifdef PERL_FLEXIBLE_EXCEPTIONS
987 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
988#else
989 JMPENV_PUSH(ret);
990#endif
6224f72b 991 switch (ret) {
312caa8e 992 case 0:
14dd3ad8
GS
993#ifndef PERL_FLEXIBLE_EXCEPTIONS
994 parse_body(env,xsinit);
995#endif
7d30b5c4
GS
996 if (PL_checkav)
997 call_list(oldscope, PL_checkav);
14dd3ad8
GS
998 ret = 0;
999 break;
6224f72b
GS
1000 case 1:
1001 STATUS_ALL_FAILURE;
1002 /* FALL THROUGH */
1003 case 2:
1004 /* my_exit() was called */
3280af22 1005 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1006 LEAVE;
1007 FREETMPS;
3280af22 1008 PL_curstash = PL_defstash;
7d30b5c4
GS
1009 if (PL_checkav)
1010 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1011 ret = STATUS_NATIVE_EXPORT;
1012 break;
6224f72b 1013 case 3:
bf49b057 1014 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1015 ret = 1;
1016 break;
6224f72b 1017 }
14dd3ad8
GS
1018 JMPENV_POP;
1019 return ret;
1020}
1021
1022#ifdef PERL_FLEXIBLE_EXCEPTIONS
1023STATIC void *
1024S_vparse_body(pTHX_ va_list args)
1025{
1026 char **env = va_arg(args, char**);
1027 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1028
1029 return parse_body(env, xsinit);
312caa8e 1030}
14dd3ad8 1031#endif
312caa8e
CS
1032
1033STATIC void *
14dd3ad8 1034S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1035{
312caa8e
CS
1036 int argc = PL_origargc;
1037 char **argv = PL_origargv;
312caa8e
CS
1038 char *scriptname = NULL;
1039 int fdscript = -1;
1040 VOL bool dosearch = FALSE;
1041 char *validarg = "";
1042 AV* comppadlist;
1043 register SV *sv;
1044 register char *s;
cf756827 1045 char *cddir = Nullch;
312caa8e 1046
3280af22 1047 sv_setpvn(PL_linestr,"",0);
79cb57f6 1048 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1049 SAVEFREESV(sv);
1050 init_main_stash();
54310121 1051
6224f72b
GS
1052 for (argc--,argv++; argc > 0; argc--,argv++) {
1053 if (argv[0][0] != '-' || !argv[0][1])
1054 break;
1055#ifdef DOSUID
1056 if (*validarg)
1057 validarg = " PHOOEY ";
1058 else
1059 validarg = argv[0];
13281fa4 1060#endif
6224f72b
GS
1061 s = argv[0]+1;
1062 reswitch:
1063 switch (*s) {
729a02f2
GS
1064 case 'C':
1065#ifdef WIN32
c0932edc 1066 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS
1067 /* FALL THROUGH */
1068#endif
1d5472a9
GS
1069#ifndef PERL_STRICT_CR
1070 case '\r':
1071#endif
6224f72b
GS
1072 case ' ':
1073 case '0':
1074 case 'F':
1075 case 'a':
1076 case 'c':
1077 case 'd':
1078 case 'D':
1079 case 'h':
1080 case 'i':
1081 case 'l':
1082 case 'M':
1083 case 'm':
1084 case 'n':
1085 case 'p':
1086 case 's':
1087 case 'u':
1088 case 'U':
1089 case 'v':
599cee73
PM
1090 case 'W':
1091 case 'X':
6224f72b 1092 case 'w':
155aba94 1093 if ((s = moreswitches(s)))
6224f72b
GS
1094 goto reswitch;
1095 break;
33b78306 1096
6224f72b 1097 case 'T':
3280af22 1098 PL_tainting = TRUE;
6224f72b
GS
1099 s++;
1100 goto reswitch;
f86702cc 1101
6224f72b 1102 case 'e':
bf4acbe4
GS
1103#ifdef MACOS_TRADITIONAL
1104 /* ignore -e for Dev:Pseudo argument */
1105 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1106 break;
bf4acbe4 1107#endif
3280af22 1108 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1109 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1110 if (!PL_e_script) {
79cb57f6 1111 PL_e_script = newSVpvn("",0);
0cb96387 1112 filter_add(read_e_script, NULL);
6224f72b
GS
1113 }
1114 if (*++s)
3280af22 1115 sv_catpv(PL_e_script, s);
6224f72b 1116 else if (argv[1]) {
3280af22 1117 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1118 argc--,argv++;
1119 }
1120 else
cea2e8a9 1121 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1122 sv_catpv(PL_e_script, "\n");
6224f72b 1123 break;
afe37c7d 1124
6224f72b
GS
1125 case 'I': /* -I handled both here and in moreswitches() */
1126 forbid_setid("-I");
1127 if (!*++s && (s=argv[1]) != Nullch) {
1128 argc--,argv++;
1129 }
6224f72b 1130 if (s && *s) {
0df16ed7
GS
1131 char *p;
1132 STRLEN len = strlen(s);
1133 p = savepvn(s, len);
9c8a64f0 1134 incpush(p, TRUE, TRUE);
0df16ed7
GS
1135 sv_catpvn(sv, "-I", 2);
1136 sv_catpvn(sv, p, len);
1137 sv_catpvn(sv, " ", 1);
6224f72b 1138 Safefree(p);
0df16ed7
GS
1139 }
1140 else
a67e862a 1141 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1142 break;
1143 case 'P':
1144 forbid_setid("-P");
3280af22 1145 PL_preprocess = TRUE;
6224f72b
GS
1146 s++;
1147 goto reswitch;
1148 case 'S':
1149 forbid_setid("-S");
1150 dosearch = TRUE;
1151 s++;
1152 goto reswitch;
1153 case 'V':
3280af22
NIS
1154 if (!PL_preambleav)
1155 PL_preambleav = newAV();
1156 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1157 if (*++s != ':') {
3280af22 1158 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1159#ifdef VMS
6b88bc9c 1160 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1161#else
3280af22 1162 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1163#endif
3280af22 1164 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1165# ifdef DEBUGGING
3280af22 1166 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1167# endif
6224f72b 1168# ifdef MULTIPLICITY
8f872242 1169 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1170# endif
4d1ff10f
AB
1171# ifdef USE_5005THREADS
1172 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1173# endif
ac5e8965
JH
1174# ifdef USE_ITHREADS
1175 sv_catpv(PL_Sv," USE_ITHREADS");
1176# endif
10cc9d2a
JH
1177# ifdef USE_64_BIT_INT
1178 sv_catpv(PL_Sv," USE_64_BIT_INT");
1179# endif
1180# ifdef USE_64_BIT_ALL
1181 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1182# endif
1183# ifdef USE_LONG_DOUBLE
1184 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1185# endif
53430762
JH
1186# ifdef USE_LARGE_FILES
1187 sv_catpv(PL_Sv," USE_LARGE_FILES");
1188# endif
ac5e8965
JH
1189# ifdef USE_SOCKS
1190 sv_catpv(PL_Sv," USE_SOCKS");
1191# endif
b363f7ed
GS
1192# ifdef PERL_IMPLICIT_CONTEXT
1193 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1194# endif
1195# ifdef PERL_IMPLICIT_SYS
1196 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1197# endif
3280af22 1198 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1199
6224f72b
GS
1200#if defined(LOCAL_PATCH_COUNT)
1201 if (LOCAL_PATCH_COUNT > 0) {
1202 int i;
3280af22 1203 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1204 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1205 if (PL_localpatches[i])
cea2e8a9 1206 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS
1207 }
1208 }
1209#endif
cea2e8a9 1210 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1211#ifdef __DATE__
1212# ifdef __TIME__
cea2e8a9 1213 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1214# else
cea2e8a9 1215 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1216# endif
1217#endif
3280af22 1218 sv_catpv(PL_Sv, "; \
6224f72b 1219$\"=\"\\n \"; \
69fcd688
JH
1220@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1221#ifdef __CYGWIN__
1222 sv_catpv(PL_Sv,"\
1223push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1224#endif
1225 sv_catpv(PL_Sv, "\
6224f72b
GS
1226print \" \\%ENV:\\n @env\\n\" if @env; \
1227print \" \\@INC:\\n @INC\\n\";");
1228 }
1229 else {
3280af22
NIS
1230 PL_Sv = newSVpv("config_vars(qw(",0);
1231 sv_catpv(PL_Sv, ++s);
1232 sv_catpv(PL_Sv, "))");
6224f72b
GS
1233 s += strlen(s);
1234 }
3280af22 1235 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1236 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1237 goto reswitch;
1238 case 'x':
3280af22 1239 PL_doextract = TRUE;
6224f72b
GS
1240 s++;
1241 if (*s)
f4c556ac 1242 cddir = s;
6224f72b
GS
1243 break;
1244 case 0:
1245 break;
1246 case '-':
1247 if (!*++s || isSPACE(*s)) {
1248 argc--,argv++;
1249 goto switch_end;
1250 }
1251 /* catch use of gnu style long options */
1252 if (strEQ(s, "version")) {
1253 s = "v";
1254 goto reswitch;
1255 }
1256 if (strEQ(s, "help")) {
1257 s = "h";
1258 goto reswitch;
1259 }
1260 s--;
1261 /* FALL THROUGH */
1262 default:
cea2e8a9 1263 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1264 }
1265 }
6224f72b 1266 switch_end:
54310121 1267
f675dbe5
CB
1268 if (
1269#ifndef SECURE_INTERNAL_GETENV
1270 !PL_tainting &&
1271#endif
cf756827 1272 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1273 {
cf756827 1274 char *popt = s;
74288ac8
GS
1275 while (isSPACE(*s))
1276 s++;
1277 if (*s == '-' && *(s+1) == 'T')
1278 PL_tainting = TRUE;
1279 else {
cf756827 1280 char *popt_copy = Nullch;
74288ac8 1281 while (s && *s) {
4ea8f8fb 1282 char *d;
74288ac8
GS
1283 while (isSPACE(*s))
1284 s++;
1285 if (*s == '-') {
1286 s++;
1287 if (isSPACE(*s))
1288 continue;
1289 }
4ea8f8fb 1290 d = s;
74288ac8
GS
1291 if (!*s)
1292 break;
1293 if (!strchr("DIMUdmw", *s))
cea2e8a9 1294 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1295 while (++s && *s) {
1296 if (isSPACE(*s)) {
cf756827
GS
1297 if (!popt_copy) {
1298 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1299 s = popt_copy + (s - popt);
1300 d = popt_copy + (d - popt);
1301 }
4ea8f8fb
MS
1302 *s++ = '\0';
1303 break;
1304 }
1305 }
1306 moreswitches(d);
6224f72b 1307 }
6224f72b
GS
1308 }
1309 }
a0d0e21e 1310
6224f72b
GS
1311 if (!scriptname)
1312 scriptname = argv[0];
3280af22 1313 if (PL_e_script) {
6224f72b
GS
1314 argc++,argv--;
1315 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1316 }
1317 else if (scriptname == Nullch) {
1318#ifdef MSDOS
1319 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1320 moreswitches("h");
1321#endif
1322 scriptname = "-";
1323 }
1324
1325 init_perllib();
1326
1327 open_script(scriptname,dosearch,sv,&fdscript);
1328
1329 validate_suid(validarg, scriptname,fdscript);
1330
64ca3a65 1331#ifndef PERL_MICRO
0b5b802d
GS
1332#if defined(SIGCHLD) || defined(SIGCLD)
1333 {
1334#ifndef SIGCHLD
1335# define SIGCHLD SIGCLD
1336#endif
1337 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1338 if (sigstate == SIG_IGN) {
1339 if (ckWARN(WARN_SIGNAL))
1340 Perl_warner(aTHX_ WARN_SIGNAL,
1341 "Can't ignore signal CHLD, forcing to default");
1342 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1343 }
1344 }
1345#endif
64ca3a65 1346#endif
0b5b802d 1347
bf4acbe4
GS
1348#ifdef MACOS_TRADITIONAL
1349 if (PL_doextract || gMacPerl_AlwaysExtract) {
1350#else
f4c556ac 1351 if (PL_doextract) {
bf4acbe4 1352#endif
6224f72b 1353 find_beginning();
f4c556ac
GS
1354 if (cddir && PerlDir_chdir(cddir) < 0)
1355 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1356
1357 }
6224f72b 1358
3280af22
NIS
1359 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1360 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1361 CvUNIQUE_on(PL_compcv);
1362
1363 PL_comppad = newAV();
1364 av_push(PL_comppad, Nullsv);
1365 PL_curpad = AvARRAY(PL_comppad);
1366 PL_comppad_name = newAV();
1367 PL_comppad_name_fill = 0;
1368 PL_min_intro_pending = 0;
1369 PL_padix = 0;
4d1ff10f 1370#ifdef USE_5005THREADS
79cb57f6 1371 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS
1372 PL_curpad[0] = (SV*)newAV();
1373 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1374 CvOWNER(PL_compcv) = 0;
1375 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1376 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1377#endif /* USE_5005THREADS */
6224f72b
GS
1378
1379 comppadlist = newAV();
1380 AvREAL_off(comppadlist);
3280af22
NIS
1381 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1382 av_store(comppadlist, 1, (SV*)PL_comppad);
1383 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1384
0c4f7ff0 1385 boot_core_PerlIO();
6224f72b 1386 boot_core_UNIVERSAL();
9a34ef1d 1387#ifndef PERL_MICRO
09bef843 1388 boot_core_xsutils();
9a34ef1d 1389#endif
6224f72b
GS
1390
1391 if (xsinit)
acfe0abc 1392 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1393#ifndef PERL_MICRO
ed79a026 1394#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1395 init_os_extras();
6224f72b 1396#endif
64ca3a65 1397#endif
6224f72b 1398
29209bc5 1399#ifdef USE_SOCKS
1b9c9cf5
DH
1400# ifdef HAS_SOCKS5_INIT
1401 socks5_init(argv[0]);
1402# else
29209bc5 1403 SOCKSinit(argv[0]);
1b9c9cf5 1404# endif
ac27b0f5 1405#endif
29209bc5 1406
6224f72b
GS
1407 init_predump_symbols();
1408 /* init_postdump_symbols not currently designed to be called */
1409 /* more than once (ENV isn't cleared first, for example) */
1410 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1411 if (!PL_do_undump)
6224f72b
GS
1412 init_postdump_symbols(argc,argv,env);
1413
1414 init_lexer();
1415
1416 /* now parse the script */
1417
1418 SETERRNO(0,SS$_NORMAL);
3280af22 1419 PL_error_count = 0;
bf4acbe4
GS
1420#ifdef MACOS_TRADITIONAL
1421 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1422 if (PL_minus_c)
1423 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1424 else {
1425 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1426 MacPerl_MPWFileName(PL_origfilename));
1427 }
1428 }
1429#else
3280af22
NIS
1430 if (yyparse() || PL_error_count) {
1431 if (PL_minus_c)
cea2e8a9 1432 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1433 else {
cea2e8a9 1434 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1435 PL_origfilename);
6224f72b
GS
1436 }
1437 }
bf4acbe4 1438#endif
57843af0 1439 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1440 PL_curstash = PL_defstash;
1441 PL_preprocess = FALSE;
1442 if (PL_e_script) {
1443 SvREFCNT_dec(PL_e_script);
1444 PL_e_script = Nullsv;
6224f72b
GS
1445 }
1446
8bfdd7d9
HS
1447/*
1448 Not sure that this is still the right place to do this now that we
1449 no longer use PL_nrs. HVDS 2001/09/09
1450*/
864dbfa3 1451 sv_setsv(get_sv("/", TRUE), PL_rs);
8bfdd7d9 1452
3280af22 1453 if (PL_do_undump)
6224f72b
GS
1454 my_unexec();
1455
57843af0
GS
1456 if (isWARN_ONCE) {
1457 SAVECOPFILE(PL_curcop);
1458 SAVECOPLINE(PL_curcop);
3280af22 1459 gv_check(PL_defstash);
57843af0 1460 }
6224f72b
GS
1461
1462 LEAVE;
1463 FREETMPS;
1464
1465#ifdef MYMALLOC
1466 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1467 dump_mstats("after compilation:");
1468#endif
1469
1470 ENTER;
3280af22 1471 PL_restartop = 0;
312caa8e 1472 return NULL;
6224f72b
GS
1473}
1474
954c1994
GS
1475/*
1476=for apidoc perl_run
1477
1478Tells a Perl interpreter to run. See L<perlembed>.
1479
1480=cut
1481*/
1482
6224f72b 1483int
0cb96387 1484perl_run(pTHXx)
6224f72b 1485{
6224f72b 1486 I32 oldscope;
14dd3ad8 1487 int ret = 0;
db36c5a1 1488 dJMPENV;
4d1ff10f 1489#ifdef USE_5005THREADS
cea2e8a9
GS
1490 dTHX;
1491#endif
6224f72b 1492
3280af22 1493 oldscope = PL_scopestack_ix;
6224f72b 1494
14dd3ad8 1495#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1496 redo_body:
14dd3ad8
GS
1497 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1498#else
1499 JMPENV_PUSH(ret);
1500#endif
6224f72b
GS
1501 switch (ret) {
1502 case 1:
1503 cxstack_ix = -1; /* start context stack again */
312caa8e 1504 goto redo_body;
14dd3ad8
GS
1505 case 0: /* normal completion */
1506#ifndef PERL_FLEXIBLE_EXCEPTIONS
1507 redo_body:
1508 run_body(oldscope);
1509#endif
1510 /* FALL THROUGH */
1511 case 2: /* my_exit() */
3280af22 1512 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1513 LEAVE;
1514 FREETMPS;
3280af22 1515 PL_curstash = PL_defstash;
31d77e54
AB
1516 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
1517 PL_endav && !PL_minus_c)
1518 call_list(oldscope, PL_endav);
6224f72b
GS
1519#ifdef MYMALLOC
1520 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1521 dump_mstats("after execution: ");
1522#endif
14dd3ad8
GS
1523 ret = STATUS_NATIVE_EXPORT;
1524 break;
6224f72b 1525 case 3:
312caa8e
CS
1526 if (PL_restartop) {
1527 POPSTACK_TO(PL_mainstack);
1528 goto redo_body;
6224f72b 1529 }
bf49b057 1530 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1531 FREETMPS;
14dd3ad8
GS
1532 ret = 1;
1533 break;
6224f72b
GS
1534 }
1535
14dd3ad8
GS
1536 JMPENV_POP;
1537 return ret;
312caa8e
CS
1538}
1539
14dd3ad8 1540#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1541STATIC void *
14dd3ad8 1542S_vrun_body(pTHX_ va_list args)
312caa8e 1543{
312caa8e
CS
1544 I32 oldscope = va_arg(args, I32);
1545
14dd3ad8
GS
1546 return run_body(oldscope);
1547}
1548#endif
1549
1550
1551STATIC void *
1552S_run_body(pTHX_ I32 oldscope)
1553{
6224f72b 1554 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1555 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1556
3280af22 1557 if (!PL_restartop) {
6224f72b
GS
1558 DEBUG_x(dump_all());
1559 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1560 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1561 PTR2UV(thr)));
6224f72b 1562
3280af22 1563 if (PL_minus_c) {
bf4acbe4 1564#ifdef MACOS_TRADITIONAL
be708cc0 1565 PerlIO_printf(Perl_error_log, "# %s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1566#else
bf49b057 1567 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1568#endif
6224f72b
GS
1569 my_exit(0);
1570 }
3280af22 1571 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1572 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1573 if (PL_initav)
1574 call_list(oldscope, PL_initav);
6224f72b
GS
1575 }
1576
1577 /* do it */
1578
3280af22 1579 if (PL_restartop) {
533c011a 1580 PL_op = PL_restartop;
3280af22 1581 PL_restartop = 0;
cea2e8a9 1582 CALLRUNOPS(aTHX);
6224f72b 1583 }
3280af22
NIS
1584 else if (PL_main_start) {
1585 CvDEPTH(PL_main_cv) = 1;
533c011a 1586 PL_op = PL_main_start;
cea2e8a9 1587 CALLRUNOPS(aTHX);
6224f72b
GS
1588 }
1589
f6b3007c
JH
1590 my_exit(0);
1591 /* NOTREACHED */
312caa8e 1592 return NULL;
6224f72b
GS
1593}
1594
954c1994
GS
1595/*
1596=for apidoc p||get_sv
1597
1598Returns the SV of the specified Perl scalar. If C<create> is set and the
1599Perl variable does not exist then it will be created. If C<create> is not
1600set and the variable does not exist then NULL is returned.
1601
1602=cut
1603*/
1604
6224f72b 1605SV*
864dbfa3 1606Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1607{
1608 GV *gv;
4d1ff10f 1609#ifdef USE_5005THREADS
6224f72b
GS
1610 if (name[1] == '\0' && !isALPHA(name[0])) {
1611 PADOFFSET tmp = find_threadsv(name);
411caa50 1612 if (tmp != NOT_IN_PAD)
6224f72b 1613 return THREADSV(tmp);
6224f72b 1614 }
4d1ff10f 1615#endif /* USE_5005THREADS */
6224f72b
GS
1616 gv = gv_fetchpv(name, create, SVt_PV);
1617 if (gv)
1618 return GvSV(gv);
1619 return Nullsv;
1620}
1621
954c1994
GS
1622/*
1623=for apidoc p||get_av
1624
1625Returns the AV of the specified Perl array. If C<create> is set and the
1626Perl variable does not exist then it will be created. If C<create> is not
1627set and the variable does not exist then NULL is returned.
1628
1629=cut
1630*/
1631
6224f72b 1632AV*
864dbfa3 1633Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1634{
1635 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1636 if (create)
1637 return GvAVn(gv);
1638 if (gv)
1639 return GvAV(gv);
1640 return Nullav;
1641}
1642
954c1994
GS
1643/*
1644=for apidoc p||get_hv
1645
1646Returns the HV of the specified Perl hash. If C<create> is set and the
1647Perl variable does not exist then it will be created. If C<create> is not
1648set and the variable does not exist then NULL is returned.
1649
1650=cut
1651*/
1652
6224f72b 1653HV*
864dbfa3 1654Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1655{
a0d0e21e
LW
1656 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1657 if (create)
1658 return GvHVn(gv);
1659 if (gv)
1660 return GvHV(gv);
1661 return Nullhv;
1662}
1663
954c1994
GS
1664/*
1665=for apidoc p||get_cv
1666
1667Returns the CV of the specified Perl subroutine. If C<create> is set and
1668the Perl subroutine does not exist then it will be declared (which has the
1669same effect as saying C<sub name;>). If C<create> is not set and the
1670subroutine does not exist then NULL is returned.
1671
1672=cut
1673*/
1674
a0d0e21e 1675CV*
864dbfa3 1676Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
1677{
1678 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1679 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
1680 /* XXX this is probably not what they think they're getting.
1681 * It has the same effect as "sub name;", i.e. just a forward
1682 * declaration! */
8ebc5c01 1683 if (create && !GvCVu(gv))
774d564b 1684 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1685 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1686 Nullop,
a0d0e21e
LW
1687 Nullop);
1688 if (gv)
8ebc5c01 1689 return GvCVu(gv);
a0d0e21e
LW
1690 return Nullcv;
1691}
1692
79072805
LW
1693/* Be sure to refetch the stack pointer after calling these routines. */
1694
954c1994
GS
1695/*
1696=for apidoc p||call_argv
1697
1698Performs a callback to the specified Perl sub. See L<perlcall>.
1699
1700=cut
1701*/
1702
a0d0e21e 1703I32
864dbfa3 1704Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1705
8ac85365
NIS
1706 /* See G_* flags in cop.h */
1707 /* null terminated arg list */
8990e307 1708{
a0d0e21e 1709 dSP;
8990e307 1710
924508f0 1711 PUSHMARK(SP);
a0d0e21e 1712 if (argv) {
8990e307 1713 while (*argv) {
a0d0e21e 1714 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
1715 argv++;
1716 }
a0d0e21e 1717 PUTBACK;
8990e307 1718 }
864dbfa3 1719 return call_pv(sub_name, flags);
8990e307
LW
1720}
1721
954c1994
GS
1722/*
1723=for apidoc p||call_pv
1724
1725Performs a callback to the specified Perl sub. See L<perlcall>.
1726
1727=cut
1728*/
1729
a0d0e21e 1730I32
864dbfa3 1731Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
1732 /* name of the subroutine */
1733 /* See G_* flags in cop.h */
a0d0e21e 1734{
864dbfa3 1735 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
1736}
1737
954c1994
GS
1738/*
1739=for apidoc p||call_method
1740
1741Performs a callback to the specified Perl method. The blessed object must
1742be on the stack. See L<perlcall>.
1743
1744=cut
1745*/
1746
a0d0e21e 1747I32
864dbfa3 1748Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
1749 /* name of the subroutine */
1750 /* See G_* flags in cop.h */
a0d0e21e 1751{
968b3946 1752 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
1753}
1754
1755/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
1756/*
1757=for apidoc p||call_sv
1758
1759Performs a callback to the Perl sub whose name is in the SV. See
1760L<perlcall>.
1761
1762=cut
1763*/
1764
a0d0e21e 1765I32
864dbfa3 1766Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1767 /* See G_* flags in cop.h */
a0d0e21e 1768{
924508f0 1769 dSP;
a0d0e21e 1770 LOGOP myop; /* fake syntax tree node */
968b3946 1771 UNOP method_op;
aa689395 1772 I32 oldmark;
13689cfe 1773 volatile I32 retval = 0;
a0d0e21e 1774 I32 oldscope;
54310121 1775 bool oldcatch = CATCH_GET;
6224f72b 1776 int ret;
533c011a 1777 OP* oldop = PL_op;
db36c5a1 1778 dJMPENV;
1e422769 1779
a0d0e21e
LW
1780 if (flags & G_DISCARD) {
1781 ENTER;
1782 SAVETMPS;
1783 }
1784
aa689395 1785 Zero(&myop, 1, LOGOP);
54310121 1786 myop.op_next = Nullop;
f51d4af5 1787 if (!(flags & G_NOARGS))
aa689395 1788 myop.op_flags |= OPf_STACKED;
54310121
PP
1789 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1790 (flags & G_ARRAY) ? OPf_WANT_LIST :
1791 OPf_WANT_SCALAR);
462e5cf6 1792 SAVEOP();
533c011a 1793 PL_op = (OP*)&myop;
aa689395 1794
3280af22
NIS
1795 EXTEND(PL_stack_sp, 1);
1796 *++PL_stack_sp = sv;
aa689395 1797 oldmark = TOPMARK;
3280af22 1798 oldscope = PL_scopestack_ix;
a0d0e21e 1799
3280af22 1800 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1801 /* Handle first BEGIN of -d. */
3280af22 1802 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
1803 /* Try harder, since this may have been a sighandler, thus
1804 * curstash may be meaningless. */
3280af22 1805 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1806 && !(flags & G_NODEBUG))
533c011a 1807 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1808
968b3946
GS
1809 if (flags & G_METHOD) {
1810 Zero(&method_op, 1, UNOP);
1811 method_op.op_next = PL_op;
1812 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1813 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1814 PL_op = (OP*)&method_op;
968b3946
GS
1815 }
1816
312caa8e 1817 if (!(flags & G_EVAL)) {
0cdb2077 1818 CATCH_SET(TRUE);
14dd3ad8 1819 call_body((OP*)&myop, FALSE);
312caa8e 1820 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1821 CATCH_SET(oldcatch);
312caa8e
CS
1822 }
1823 else {
d78bda3d 1824 myop.op_other = (OP*)&myop;
3280af22 1825 PL_markstack_ptr--;
4633a7c4
LW
1826 /* we're trying to emulate pp_entertry() here */
1827 {
c09156bb 1828 register PERL_CONTEXT *cx;
54310121 1829 I32 gimme = GIMME_V;
ac27b0f5 1830
4633a7c4
LW
1831 ENTER;
1832 SAVETMPS;
ac27b0f5 1833
968b3946 1834 push_return(Nullop);
1d76a5c3 1835 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1836 PUSHEVAL(cx, 0, 0);
533c011a 1837 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1838
faef0170 1839 PL_in_eval = EVAL_INEVAL;
4633a7c4 1840 if (flags & G_KEEPERR)
faef0170 1841 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1842 else
38a03e6e 1843 sv_setpv(ERRSV,"");
4633a7c4 1844 }
3280af22 1845 PL_markstack_ptr++;
a0d0e21e 1846
14dd3ad8
GS
1847#ifdef PERL_FLEXIBLE_EXCEPTIONS
1848 redo_body:
1849 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1850 (OP*)&myop, FALSE);
14dd3ad8
GS
1851#else
1852 JMPENV_PUSH(ret);
1853#endif
6224f72b
GS
1854 switch (ret) {
1855 case 0:
14dd3ad8
GS
1856#ifndef PERL_FLEXIBLE_EXCEPTIONS
1857 redo_body:
1858 call_body((OP*)&myop, FALSE);
1859#endif
312caa8e
CS
1860 retval = PL_stack_sp - (PL_stack_base + oldmark);
1861 if (!(flags & G_KEEPERR))
1862 sv_setpv(ERRSV,"");
a0d0e21e 1863 break;
6224f72b 1864 case 1:
f86702cc 1865 STATUS_ALL_FAILURE;
a0d0e21e 1866 /* FALL THROUGH */
6224f72b 1867 case 2:
a0d0e21e 1868 /* my_exit() was called */
3280af22 1869 PL_curstash = PL_defstash;
a0d0e21e 1870 FREETMPS;
14dd3ad8 1871 JMPENV_POP;
cc3604b1 1872 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1873 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1874 my_exit_jump();
a0d0e21e 1875 /* NOTREACHED */
6224f72b 1876 case 3:
3280af22 1877 if (PL_restartop) {
533c011a 1878 PL_op = PL_restartop;
3280af22 1879 PL_restartop = 0;
312caa8e 1880 goto redo_body;
a0d0e21e 1881 }
3280af22 1882 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1883 if (flags & G_ARRAY)
1884 retval = 0;
1885 else {
1886 retval = 1;
3280af22 1887 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1888 }
312caa8e 1889 break;
a0d0e21e 1890 }
a0d0e21e 1891
3280af22 1892 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
1893 SV **newsp;
1894 PMOP *newpm;
1895 I32 gimme;
c09156bb 1896 register PERL_CONTEXT *cx;
a0a2876f
LW
1897 I32 optype;
1898
1899 POPBLOCK(cx,newpm);
1900 POPEVAL(cx);
1901 pop_return();
3280af22 1902 PL_curpm = newpm;
a0a2876f 1903 LEAVE;
a0d0e21e 1904 }
14dd3ad8 1905 JMPENV_POP;
a0d0e21e 1906 }
1e422769 1907
a0d0e21e 1908 if (flags & G_DISCARD) {
3280af22 1909 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1910 retval = 0;
1911 FREETMPS;
1912 LEAVE;
1913 }
533c011a 1914 PL_op = oldop;
a0d0e21e
LW
1915 return retval;
1916}
1917
14dd3ad8 1918#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1919STATIC void *
14dd3ad8 1920S_vcall_body(pTHX_ va_list args)
312caa8e
CS
1921{
1922 OP *myop = va_arg(args, OP*);
1923 int is_eval = va_arg(args, int);
1924
14dd3ad8 1925 call_body(myop, is_eval);
312caa8e
CS
1926 return NULL;
1927}
14dd3ad8 1928#endif
312caa8e
CS
1929
1930STATIC void
14dd3ad8 1931S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1932{
312caa8e
CS
1933 if (PL_op == myop) {
1934 if (is_eval)
f807eda9 1935 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1936 else
f807eda9 1937 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
1938 }
1939 if (PL_op)
cea2e8a9 1940 CALLRUNOPS(aTHX);
312caa8e
CS
1941}
1942
6e72f9df 1943/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1944
954c1994
GS
1945/*
1946=for apidoc p||eval_sv
1947
1948Tells Perl to C<eval> the string in the SV.
1949
1950=cut
1951*/
1952
a0d0e21e 1953I32
864dbfa3 1954Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1955
8ac85365 1956 /* See G_* flags in cop.h */
a0d0e21e 1957{
924508f0 1958 dSP;
a0d0e21e 1959 UNOP myop; /* fake syntax tree node */
8fa7f367 1960 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1961 volatile I32 retval = 0;
4633a7c4 1962 I32 oldscope;
6224f72b 1963 int ret;
533c011a 1964 OP* oldop = PL_op;
db36c5a1 1965 dJMPENV;
84902520 1966
4633a7c4
LW
1967 if (flags & G_DISCARD) {
1968 ENTER;
1969 SAVETMPS;
1970 }
1971
462e5cf6 1972 SAVEOP();
533c011a
NIS
1973 PL_op = (OP*)&myop;
1974 Zero(PL_op, 1, UNOP);
3280af22
NIS
1975 EXTEND(PL_stack_sp, 1);
1976 *++PL_stack_sp = sv;
1977 oldscope = PL_scopestack_ix;
79072805 1978
4633a7c4
LW
1979 if (!(flags & G_NOARGS))
1980 myop.op_flags = OPf_STACKED;
79072805 1981 myop.op_next = Nullop;
6e72f9df 1982 myop.op_type = OP_ENTEREVAL;
54310121
PP
1983 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1984 (flags & G_ARRAY) ? OPf_WANT_LIST :
1985 OPf_WANT_SCALAR);
6e72f9df
PP
1986 if (flags & G_KEEPERR)
1987 myop.op_flags |= OPf_SPECIAL;
4633a7c4 1988
14dd3ad8 1989#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1990 redo_body:
14dd3ad8 1991 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1992 (OP*)&myop, TRUE);
14dd3ad8
GS
1993#else
1994 JMPENV_PUSH(ret);
1995#endif
6224f72b
GS
1996 switch (ret) {
1997 case 0:
14dd3ad8
GS
1998#ifndef PERL_FLEXIBLE_EXCEPTIONS
1999 redo_body:
2000 call_body((OP*)&myop,TRUE);
2001#endif
312caa8e
CS
2002 retval = PL_stack_sp - (PL_stack_base + oldmark);
2003 if (!(flags & G_KEEPERR))
2004 sv_setpv(ERRSV,"");
4633a7c4 2005 break;
6224f72b 2006 case 1:
f86702cc 2007 STATUS_ALL_FAILURE;
4633a7c4 2008 /* FALL THROUGH */
6224f72b 2009 case 2:
4633a7c4 2010 /* my_exit() was called */
3280af22 2011 PL_curstash = PL_defstash;
4633a7c4 2012 FREETMPS;
14dd3ad8 2013 JMPENV_POP;
cc3604b1 2014 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2015 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2016 my_exit_jump();
4633a7c4 2017 /* NOTREACHED */
6224f72b 2018 case 3:
3280af22 2019 if (PL_restartop) {
533c011a 2020 PL_op = PL_restartop;
3280af22 2021 PL_restartop = 0;
312caa8e 2022 goto redo_body;
4633a7c4 2023 }
3280af22 2024 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2025 if (flags & G_ARRAY)
2026 retval = 0;
2027 else {
2028 retval = 1;
3280af22 2029 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2030 }
312caa8e 2031 break;
4633a7c4
LW
2032 }
2033
14dd3ad8 2034 JMPENV_POP;
4633a7c4 2035 if (flags & G_DISCARD) {
3280af22 2036 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2037 retval = 0;
2038 FREETMPS;
2039 LEAVE;
2040 }
533c011a 2041 PL_op = oldop;
4633a7c4
LW
2042 return retval;
2043}
2044
954c1994
GS
2045/*
2046=for apidoc p||eval_pv
2047
2048Tells Perl to C<eval> the given string and return an SV* result.
2049
2050=cut
2051*/
2052
137443ea 2053SV*
864dbfa3 2054Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2055{
2056 dSP;
2057 SV* sv = newSVpv(p, 0);
2058
864dbfa3 2059 eval_sv(sv, G_SCALAR);
137443ea
PP
2060 SvREFCNT_dec(sv);
2061
2062 SPAGAIN;
2063 sv = POPs;
2064 PUTBACK;
2065
2d8e6c8d
GS
2066 if (croak_on_error && SvTRUE(ERRSV)) {
2067 STRLEN n_a;
cea2e8a9 2068 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2069 }
137443ea
PP
2070
2071 return sv;
2072}
2073
4633a7c4
LW
2074/* Require a module. */
2075
954c1994
GS
2076/*
2077=for apidoc p||require_pv
2078
7d3fb230
BS
2079Tells Perl to C<require> the file named by the string argument. It is
2080analogous to the Perl code C<eval "require '$file'">. It's even
2081implemented that way; consider using Perl_load_module instead.
954c1994 2082
7d3fb230 2083=cut */
954c1994 2084
4633a7c4 2085void
864dbfa3 2086Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2087{
d3acc0f7
JP
2088 SV* sv;
2089 dSP;
e788e7d3 2090 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2091 PUTBACK;
2092 sv = sv_newmortal();
4633a7c4
LW
2093 sv_setpv(sv, "require '");
2094 sv_catpv(sv, pv);
2095 sv_catpv(sv, "'");
864dbfa3 2096 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2097 SPAGAIN;
2098 POPSTACK;
79072805
LW
2099}
2100
79072805 2101void
864dbfa3 2102Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW
2103{
2104 register GV *gv;
2105
155aba94 2106 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2107 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2108}
2109
76e3520e 2110STATIC void
cea2e8a9 2111S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2112{
ab821d7f 2113 /* This message really ought to be max 23 lines.
75c72d73 2114 * Removed -h because the user already knows that option. Others? */
fb73857a 2115
76e3520e 2116 static char *usage_msg[] = {
fb73857a
PP
2117"-0[octal] specify record separator (\\0, if no argument)",
2118"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2119"-C enable native wide character system interfaces",
1950ee41 2120"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2121"-d[:debugger] run program under debugger",
2122"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2123"-e 'command' one line of program (several -e's allowed, omit programfile)",
2124"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2125"-i[extension] edit <> files in place (makes backup if extension supplied)",
2126"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2127"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2128"-[mM][-]module execute `use/no module...' before executing program",
2129"-n assume 'while (<>) { ... }' loop around program",
2130"-p assume loop like -n but print line also, like sed",
2131"-P run program through C preprocessor before compilation",
2132"-s enable rudimentary parsing for switches after programfile",
2133"-S look for programfile using PATH environment variable",
2134"-T enable tainting checks",
2135"-u dump core after parsing program",
fb73857a 2136"-U allow unsafe operations",
aac3bd0d
GS
2137"-v print version, subversion (includes VERY IMPORTANT perl info)",
2138"-V[:variable] print configuration summary (or a single Config.pm variable)",
2139"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS
2140"-W enable all warnings",
2141"-X disable all warnings",
fb73857a
PP
2142"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2143"\n",
2144NULL
2145};
76e3520e 2146 char **p = usage_msg;
fb73857a 2147
b0e47665
GS
2148 PerlIO_printf(PerlIO_stdout(),
2149 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2150 name);
fb73857a 2151 while (*p)
b0e47665 2152 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2153}
2154
79072805
LW
2155/* This routine handles any switches that can be given during run */
2156
2157char *
864dbfa3 2158Perl_moreswitches(pTHX_ char *s)
79072805 2159{
ba210ebe 2160 STRLEN numlen;
c07a80fd 2161 U32 rschar;
79072805
LW
2162
2163 switch (*s) {
2164 case '0':
a863c7d1 2165 {
53305cf1
NC
2166 I32 flags = 0;
2167 numlen = 4;
2168 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
8bfdd7d9 2169 SvREFCNT_dec(PL_rs);
c07a80fd 2170 if (rschar & ~((U8)~0))
8bfdd7d9 2171 PL_rs = &PL_sv_undef;
c07a80fd 2172 else if (!rschar && numlen >= 2)
8bfdd7d9 2173 PL_rs = newSVpvn("", 0);
c07a80fd
PP
2174 else {
2175 char ch = rschar;
8bfdd7d9 2176 PL_rs = newSVpvn(&ch, 1);
79072805
LW
2177 }
2178 return s + numlen;
a863c7d1 2179 }
46487f74
GS
2180 case 'C':
2181 PL_widesyscalls = TRUE;
2182 s++;
2183 return s;
2304df62 2184 case 'F':
3280af22
NIS
2185 PL_minus_F = TRUE;
2186 PL_splitstr = savepv(s + 1);
2304df62
AD
2187 s += strlen(s);
2188 return s;
79072805 2189 case 'a':
3280af22 2190 PL_minus_a = TRUE;
79072805
LW
2191 s++;
2192 return s;
2193 case 'c':
3280af22 2194 PL_minus_c = TRUE;
79072805
LW
2195 s++;
2196 return s;
2197 case 'd':
bbce6d69 2198 forbid_setid("-d");
4633a7c4 2199 s++;
70c94a19
RR
2200 /* The following permits -d:Mod to accepts arguments following an =
2201 in the fashion that -MSome::Mod does. */
2202 if (*s == ':' || *s == '=') {
2203 char *start;
2204 SV *sv;
2205 sv = newSVpv("use Devel::", 0);
2206 start = ++s;
2207 /* We now allow -d:Module=Foo,Bar */
2208 while(isALNUM(*s) || *s==':') ++s;
2209 if (*s != '=')
2210 sv_catpv(sv, start);
2211 else {
2212 sv_catpvn(sv, start, s-start);
2213 sv_catpv(sv, " split(/,/,q{");
2214 sv_catpv(sv, ++s);
2215 sv_catpv(sv, "})");
2216 }
4633a7c4 2217 s += strlen(s);
70c94a19 2218 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2219 }
ed094faf 2220 if (!PL_perldb) {
3280af22 2221 PL_perldb = PERLDB_ALL;
a0d0e21e 2222 init_debugger();
ed094faf 2223 }
79072805
LW
2224 return s;
2225 case 'D':
0453d815 2226 {
79072805 2227#ifdef DEBUGGING
bbce6d69 2228 forbid_setid("-D");
79072805 2229 if (isALPHA(s[1])) {
04932ac8
DM
2230 /* if adding extra options, remember to update DEBUG_MASK */
2231 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW
2232 char *d;
2233
93a17b20 2234 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2235 PL_debug |= 1 << (d - debopts);
79072805
LW
2236 }
2237 else {
3280af22 2238 PL_debug = atoi(s+1);
79072805
LW
2239 for (s++; isDIGIT(*s); s++) ;
2240 }
aea4f609 2241 PL_debug |= DEBUG_TOP_FLAG;
79072805 2242#else
0453d815
PM
2243 if (ckWARN_d(WARN_DEBUGGING))
2244 Perl_warner(aTHX_ WARN_DEBUGGING,
2245 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2246 for (s++; isALNUM(*s); s++) ;
79072805
LW
2247#endif
2248 /*SUPPRESS 530*/
2249 return s;
0453d815 2250 }
4633a7c4 2251 case 'h':
ac27b0f5 2252 usage(PL_origargv[0]);
6ad3d225 2253 PerlProc_exit(0);
79072805 2254 case 'i':
3280af22
NIS
2255 if (PL_inplace)
2256 Safefree(PL_inplace);
2257 PL_inplace = savepv(s+1);
79072805 2258 /*SUPPRESS 530*/
3280af22 2259 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2260 if (*s) {
fb73857a 2261 *s++ = '\0';
7b8d334a
GS
2262 if (*s == '-') /* Additional switches on #! line. */
2263 s++;
2264 }
fb73857a
PP
2265 return s;
2266 case 'I': /* -I handled both here and in parse_perl() */
bbce6d69 2267 forbid_setid("-I");
fb73857a
PP
2268 ++s;
2269 while (*s && isSPACE(*s))
2270 ++s;
2271 if (*s) {
774d564b 2272 char *e, *p;
0df16ed7
GS
2273 p = s;
2274 /* ignore trailing spaces (possibly followed by other switches) */
2275 do {
2276 for (e = p; *e && !isSPACE(*e); e++) ;
2277 p = e;
2278 while (isSPACE(*p))
2279 p++;
2280 } while (*p && *p != '-');
2281 e = savepvn(s, e-s);
9c8a64f0 2282 incpush(e, TRUE, TRUE);
0df16ed7
GS
2283 Safefree(e);
2284 s = p;
2285 if (*s == '-')
2286 s++;
79072805
LW
2287 }
2288 else
a67e862a 2289 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2290 return s;
79072805 2291 case 'l':
3280af22 2292 PL_minus_l = TRUE;
79072805 2293 s++;
7889fe52
NIS
2294 if (PL_ors_sv) {
2295 SvREFCNT_dec(PL_ors_sv);
2296 PL_ors_sv = Nullsv;
2297 }
79072805 2298 if (isDIGIT(*s)) {
53305cf1 2299 I32 flags = 0;
7889fe52 2300 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2301 numlen = 3 + (*s == '0');
2302 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2303 s += numlen;
2304 }
2305 else {
8bfdd7d9 2306 if (RsPARA(PL_rs)) {
7889fe52
NIS
2307 PL_ors_sv = newSVpvn("\n\n",2);
2308 }
2309 else {
8bfdd7d9 2310 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2311 }
79072805
LW
2312 }
2313 return s;
1a30305b 2314 case 'M':
bbce6d69 2315 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2316 /* FALL THROUGH */
2317 case 'm':
bbce6d69 2318 forbid_setid("-m"); /* XXX ? */
1a30305b 2319 if (*++s) {
a5f75d66 2320 char *start;
11343788 2321 SV *sv;
a5f75d66
AD
2322 char *use = "use ";
2323 /* -M-foo == 'no foo' */
2324 if (*s == '-') { use = "no "; ++s; }
11343788 2325 sv = newSVpv(use,0);
a5f75d66 2326 start = s;
1a30305b 2327 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2328 while(isALNUM(*s) || *s==':') ++s;
2329 if (*s != '=') {
11343788 2330 sv_catpv(sv, start);
c07a80fd
PP
2331 if (*(start-1) == 'm') {
2332 if (*s != '\0')
cea2e8a9 2333 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2334 sv_catpv( sv, " ()");
c07a80fd
PP
2335 }
2336 } else {
6df41af2 2337 if (s == start)
be98fb35
GS
2338 Perl_croak(aTHX_ "Module name required with -%c option",
2339 s[-1]);
11343788
MB
2340 sv_catpvn(sv, start, s-start);
2341 sv_catpv(sv, " split(/,/,q{");
2342 sv_catpv(sv, ++s);
2343 sv_catpv(sv, "})");
c07a80fd 2344 }
1a30305b 2345 s += strlen(s);
5c831c24 2346 if (!PL_preambleav)
3280af22
NIS
2347 PL_preambleav = newAV();
2348 av_push(PL_preambleav, sv);
1a30305b
PP
2349 }
2350 else
cea2e8a9 2351 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2352 return s;
79072805 2353 case 'n':
3280af22 2354 PL_minus_n = TRUE;
79072805
LW
2355 s++;
2356 return s;
2357 case 'p':
3280af22 2358 PL_minus_p = TRUE;
79072805
LW
2359 s++;
2360 return s;
2361 case 's':
bbce6d69 2362 forbid_setid("-s");
3280af22 2363 PL_doswitches = TRUE;
79072805
LW
2364 s++;
2365 return s;
463ee0b2 2366 case 'T':
3280af22 2367 if (!PL_tainting)
cea2e8a9 2368 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW
2369 s++;
2370 return s;
79072805 2371 case 'u':
bf4acbe4
GS
2372#ifdef MACOS_TRADITIONAL
2373 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2374#endif
3280af22 2375 PL_do_undump = TRUE;
79072805
LW
2376 s++;
2377 return s;
2378 case 'U':
3280af22 2379 PL_unsafe = TRUE;
79072805
LW
2380 s++;
2381 return s;
2382 case 'v':
8e9464f1 2383#if !defined(DGUX)
b0e47665 2384 PerlIO_printf(PerlIO_stdout(),
d2560b70 2385 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2386 PL_patchlevel, ARCHNAME));
8e9464f1
JH
2387#else /* DGUX */
2388/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2389 PerlIO_printf(PerlIO_stdout(),
2390 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2391 PerlIO_printf(PerlIO_stdout(),
2392 Perl_form(aTHX_ " built under %s at %s %s\n",
2393 OSNAME, __DATE__, __TIME__));
2394 PerlIO_printf(PerlIO_stdout(),
2395 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2396 OSVERS));
8e9464f1
JH
2397#endif /* !DGUX */
2398
fb73857a
PP
2399#if defined(LOCAL_PATCH_COUNT)
2400 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2401 PerlIO_printf(PerlIO_stdout(),
2402 "\n(with %d registered patch%s, "
2403 "see perl -V for more detail)",
2404 (int)LOCAL_PATCH_COUNT,
2405 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2406#endif
1a30305b 2407
b0e47665 2408 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2409 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH
2410#ifdef MACOS_TRADITIONAL
2411 PerlIO_printf(PerlIO_stdout(),
084592ab 2412 "\nMac OS port Copyright (c) 1991-2001, Matthias Neeracher\n");
eae9c151 2413#endif
79072805 2414#ifdef MSDOS
b0e47665
GS
2415 PerlIO_printf(PerlIO_stdout(),
2416 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2417#endif
2418#ifdef DJGPP
b0e47665
GS
2419 PerlIO_printf(PerlIO_stdout(),
2420 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2421 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2422#endif
79072805 2423#ifdef OS2
b0e47665
GS
2424 PerlIO_printf(PerlIO_stdout(),
2425 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2426 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2427#endif
79072805 2428#ifdef atarist
b0e47665
GS
2429 PerlIO_printf(PerlIO_stdout(),
2430 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2431#endif
a3f9223b 2432#ifdef __BEOS__
b0e47665
GS
2433 PerlIO_printf(PerlIO_stdout(),
2434 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2435#endif
1d84e8df 2436#ifdef MPE
b0e47665 2437 PerlIO_printf(PerlIO_stdout(),
dc22e1c4 2438 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2001\n");
1d84e8df 2439#endif
9d116dd7 2440#ifdef OEMVS
b0e47665
GS
2441 PerlIO_printf(PerlIO_stdout(),
2442 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2443#endif
495c5fdc 2444#ifdef __VOS__
b0e47665
GS
2445 PerlIO_printf(PerlIO_stdout(),
2446 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2447#endif
092bebab 2448#ifdef __OPEN_VM
b0e47665
GS
2449 PerlIO_printf(PerlIO_stdout(),
2450 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2451#endif
a1a0e61e 2452#ifdef POSIX_BC
b0e47665
GS
2453 PerlIO_printf(PerlIO_stdout(),
2454 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2455#endif
61ae2fbf 2456#ifdef __MINT__
b0e47665
GS
2457 PerlIO_printf(PerlIO_stdout(),
2458 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2459#endif
f83d2536 2460#ifdef EPOC
b0e47665
GS
2461 PerlIO_printf(PerlIO_stdout(),
2462 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2463#endif
e1caacb4
JH
2464#ifdef UNDER_CE
2465 printf("WINCE port by Rainer Keuchel, 2001\n");
2466 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2467 wce_hitreturn();
2468#endif
baed7233
DL
2469#ifdef BINARY_BUILD_NOTICE
2470 BINARY_BUILD_NOTICE;
2471#endif
b0e47665
GS
2472 PerlIO_printf(PerlIO_stdout(),
2473 "\n\
79072805 2474Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2475GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2476Complete documentation for Perl, including FAQ lists, should be found on\n\
2477this system using `man perl' or `perldoc perl'. If you have access to the\n\
2478Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2479 PerlProc_exit(0);
79072805 2480 case 'w':
599cee73 2481 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2482 PL_dowarn |= G_WARN_ON;
599cee73
PM
2483 s++;
2484 return s;
2485 case 'W':
ac27b0f5 2486 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
d3a7d8c7 2487 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2488 s++;
2489 return s;
2490 case 'X':
ac27b0f5 2491 PL_dowarn = G_WARN_ALL_OFF;
d3a7d8c7 2492 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2493 s++;
2494 return s;
a0d0e21e 2495 case '*':
79072805
LW
2496 case ' ':
2497 if (s[1] == '-') /* Additional switches on #! line. */
2498 return s+2;
2499 break;
a0d0e21e 2500 case '-':
79072805 2501 case 0:
51882d45 2502#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2503 case '\r':
2504#endif
79072805
LW
2505 case '\n':
2506 case '\t':
2507 break;
aa689395
PP
2508#ifdef ALTERNATE_SHEBANG
2509 case 'S': /* OS/2 needs -S on "extproc" line. */
2510 break;
2511#endif
a0d0e21e 2512 case 'P':
3280af22 2513 if (PL_preprocess)
a0d0e21e
LW
2514 return s+1;
2515 /* FALL THROUGH */
79072805 2516 default:
cea2e8a9 2517 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2518 }
2519 return Nullch;
2520}
2521
2522/* compliments of Tom Christiansen */
2523
2524/* unexec() can be found in the Gnu emacs distribution */
ee580363 2525/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2526
2527void
864dbfa3 2528Perl_my_unexec(pTHX)
79072805
LW
2529{
2530#ifdef UNEXEC
46fc3d4c
PP
2531 SV* prog;
2532 SV* file;
ee580363 2533 int status = 1;
79072805
LW
2534 extern int etext;
2535
ee580363 2536 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2537 sv_catpv(prog, "/perl");
6b88bc9c 2538 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2539 sv_catpv(file, ".perldump");
79072805 2540
ee580363
GS
2541 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2542 /* unexec prints msg to stderr in case of failure */
6ad3d225 2543 PerlProc_exit(status);
79072805 2544#else
a5f75d66
AD
2545# ifdef VMS
2546# include <lib$routines.h>
2547 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2548# else
79072805 2549 ABORT(); /* for use with undump */
aa689395 2550# endif
a5f75d66 2551#endif
79072805
LW
2552}
2553
cb68f92d
GS
2554/* initialize curinterp */
2555STATIC void
cea2e8a9 2556S_init_interp(pTHX)
cb68f92d
GS
2557{
2558
acfe0abc
GS
2559#ifdef MULTIPLICITY
2560# define PERLVAR(var,type)
2561# define PERLVARA(var,n,type)
2562# if defined(PERL_IMPLICIT_CONTEXT)
2563# if defined(USE_5005THREADS)
2564# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2565# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
2566# else /* !USE_5005THREADS */
2567# define PERLVARI(var,type,init) aTHX->var = init;
2568# define PERLVARIC(var,type,init) aTHX->var = init;
2569# endif /* USE_5005THREADS */
3967c732 2570# else
acfe0abc
GS
2571# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2572# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2573# endif
acfe0abc
GS
2574# include "intrpvar.h"
2575# ifndef USE_5005THREADS
2576# include "thrdvar.h"
2577# endif
2578# undef PERLVAR
2579# undef PERLVARA
2580# undef PERLVARI
2581# undef PERLVARIC
2582#else
2583# define PERLVAR(var,type)
2584# define PERLVARA(var,n,type)
2585# define PERLVARI(var,type,init) PL_##var = init;
2586# define PERLVARIC(var,type,init) PL_##var = init;
2587# include "intrpvar.h"
2588# ifndef USE_5005THREADS
2589# include "thrdvar.h"
2590# endif
2591# undef PERLVAR
2592# undef PERLVARA
2593# undef PERLVARI
2594# undef PERLVARIC
cb68f92d
GS
2595#endif
2596
cb68f92d
GS
2597}
2598
76e3520e 2599STATIC void
cea2e8a9 2600S_init_main_stash(pTHX)
79072805 2601{
463ee0b2 2602 GV *gv;
6e72f9df 2603
3d47000e 2604
ac27b0f5 2605
3280af22 2606 PL_curstash = PL_defstash = newHV();
79cb57f6 2607 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
2608 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2609 SvREFCNT_dec(GvHV(gv));
3280af22 2610 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2611 SvREADONLY_on(gv);
3280af22
NIS
2612 HvNAME(PL_defstash) = savepv("main");
2613 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2614 GvMULTI_on(PL_incgv);
2615 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2616 GvMULTI_on(PL_hintgv);
2617 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2618 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2619 GvMULTI_on(PL_errgv);
2620 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2621 GvMULTI_on(PL_replgv);
cea2e8a9 2622 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
2623 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2624 sv_setpvn(ERRSV, "", 0);
3280af22 2625 PL_curstash = PL_defstash;
11faa288 2626 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2627 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2628 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2629 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2630 /* We must init $/ before switches are processed. */
864dbfa3 2631 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
2632}
2633
76e3520e 2634STATIC void
cea2e8a9 2635S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2636{
6c4ab083 2637 *fdscript = -1;
79072805 2638
3280af22
NIS
2639 if (PL_e_script) {
2640 PL_origfilename = savepv("-e");
96436eeb 2641 }
6c4ab083
GS
2642 else {
2643 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2644 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
2645
2646 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2647 char *s = scriptname + 8;
2648 *fdscript = atoi(s);
2649 while (isDIGIT(*s))
2650 s++;
2651 if (*s) {
2652 scriptname = savepv(s + 1);
3280af22
NIS
2653 Safefree(PL_origfilename);
2654 PL_origfilename = scriptname;
6c4ab083
GS
2655 }
2656 }
2657 }
2658
f4dd75d9
GS
2659#ifdef USE_ITHREADS
2660 Safefree(CopFILE(PL_curcop));
2661#else
2662 SvREFCNT_dec(CopFILEGV(PL_curcop));
2663#endif
57843af0 2664 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2665 if (strEQ(PL_origfilename,"-"))
79072805 2666 scriptname = "";
01f988be 2667 if (*fdscript >= 0) {
3280af22 2668 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
96436eeb 2669#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS
2670 if (PL_rsfp)
2671 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb
PP
2672#endif
2673 }
3280af22 2674 else if (PL_preprocess) {
46fc3d4c 2675 char *cpp_cfg = CPPSTDIN;
79cb57f6 2676 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
2677 SV *cmd = NEWSV(0,0);
2678
2679 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2680 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2681 sv_catpv(cpp, cpp_cfg);
79072805 2682
0df16ed7 2683 sv_catpvn(sv, "-I", 2);
fed7345c 2684 sv_catpv(sv,PRIVLIB_EXP);
46fc3d4c 2685
14953ddc
MB
2686 DEBUG_P(PerlIO_printf(Perl_debug_log,
2687 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2688 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
52853b95 2689#if defined(MSDOS) || defined(WIN32)
cea2e8a9 2690 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW
2691sed %s -e \"/^[^#]/b\" \
2692 -e \"/^#[ ]*include[ ]/b\" \
2693 -e \"/^#[ ]*define[ ]/b\" \
2694 -e \"/^#[ ]*if[ ]/b\" \
2695 -e \"/^#[ ]*ifdef[ ]/b\" \
2696 -e \"/^#[ ]*ifndef[ ]/b\" \
2697 -e \"/^#[ ]*else/b\" \
2698 -e \"/^#[ ]*elif[ ]/b\" \
2699 -e \"/^#[ ]*undef[ ]/b\" \
2700 -e \"/^#[ ]*endif/b\" \
2701 -e \"s/^#.*//\" \
894356b3 2702 %s | %"SVf" -C %"SVf" %s",
6b88bc9c 2703 (PL_doextract ? "-e \"1,/^#/d\n\"" : ""),
79072805 2704#else
092bebab 2705# ifdef __OPEN_VM
cea2e8a9 2706 Perl_sv_setpvf(aTHX_ cmd, "\
092bebab
JH
2707%s %s -e '/^[^#]/b' \
2708 -e '/^#[ ]*include[ ]/b' \
2709 -e '/^#[ ]*define[ ]/b' \
2710 -e '/^#[ ]*if[ ]/b' \
2711 -e '/^#[ ]*ifdef[ ]/b' \
2712 -e '/^#[ ]*ifndef[ ]/b' \
2713 -e '/^#[ ]*else/b' \
2714 -e '/^#[ ]*elif[ ]/b' \
2715 -e '/^#[ ]*undef[ ]/b' \
2716 -e '/^#[ ]*endif/b' \
2717 -e 's/^[ ]*#.*//' \
894356b3 2718 %s | %"SVf" %"SVf" %s",
092bebab 2719# else
cea2e8a9 2720 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW
2721%s %s -e '/^[^#]/b' \
2722 -e '/^#[ ]*include[ ]/b' \
2723 -e '/^#[ ]*define[ ]/b' \
2724 -e '/^#[ ]*if[ ]/b' \
2725 -e '/^#[ ]*ifdef[ ]/b' \
2726 -e '/^#[ ]*ifndef[ ]/b' \
2727 -e '/^#[ ]*else/b' \
2728 -e '/^#[ ]*elif[ ]/b' \
2729 -e '/^#[ ]*undef[ ]/b' \
2730 -e '/^#[ ]*endif/b' \
2731 -e 's/^[ ]*#.*//' \
894356b3 2732 %s | %"SVf" -C %"SVf" %s",
092bebab 2733# endif
79072805
LW
2734#ifdef LOC_SED
2735 LOC_SED,
2736#else
2737 "sed",
2738#endif
3280af22 2739 (PL_doextract ? "-e '1,/^#/d\n'" : ""),
79072805 2740#endif
46fc3d4c 2741 scriptname, cpp, sv, CPPMINUS);
3280af22 2742 PL_doextract = FALSE;
79072805 2743#ifdef IAMSUID /* actually, this is caught earlier */
b28d0864 2744 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
79072805 2745#ifdef HAS_SETEUID
b28d0864 2746 (void)seteuid(PL_uid); /* musn't stay setuid root */
79072805
LW
2747#else
2748#ifdef HAS_SETREUID
b28d0864 2749 (void)setreuid((Uid_t)-1, PL_uid);
85e6fe83
LW
2750#else
2751#ifdef HAS_SETRESUID
b28d0864 2752 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
79072805 2753#else
b28d0864 2754 PerlProc_setuid(PL_uid);
79072805
LW
2755#endif
2756#endif
85e6fe83 2757#endif
b28d0864 2758 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2759 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805
LW
2760 }
2761#endif /* IAMSUID */
3280af22 2762 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c
PP
2763 SvREFCNT_dec(cmd);
2764 SvREFCNT_dec(cpp);
79072805
LW
2765 }
2766 else if (!*scriptname) {
bbce6d69 2767 forbid_setid("program input from stdin");
3280af22 2768 PL_rsfp = PerlIO_stdin();
79072805 2769 }
96436eeb 2770 else {
3280af22 2771 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
96436eeb 2772#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS
2773 if (PL_rsfp)
2774 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb
PP
2775#endif
2776 }
3280af22 2777 if (!PL_rsfp) {
13281fa4 2778#ifdef DOSUID
a687059c 2779#ifndef IAMSUID /* in case script is not readable before setuid */
6b88bc9c 2780 if (PL_euid &&
cc49e20b 2781 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
6b88bc9c
GS
2782 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2783 {
46fc3d4c 2784 /* try again */
a7cb1f99 2785 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
2786 (int)PERL_REVISION, (int)PERL_VERSION,
2787 (int)PERL_SUBVERSION), PL_origargv);
cea2e8a9 2788 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
2789 }
2790#endif
2791#endif
584d69ec
JH
2792#ifdef IAMSUID
2793 errno = EPERM;
2794 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2795 Strerror(errno));
2796#else
cea2e8a9 2797 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
cc49e20b 2798 CopFILE(PL_curcop), Strerror(errno));
584d69ec 2799#endif
13281fa4 2800 }
79072805 2801}
8d063cd8 2802
7b89560d
JH
2803/* Mention
2804 * I_SYSSTATVFS HAS_FSTATVFS
2805 * I_SYSMOUNT
c890dc6c 2806 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
2807 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2808 * here so that metaconfig picks them up. */
2809
104d25b7 2810#ifdef IAMSUID
864dbfa3 2811STATIC int
e688b231 2812S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2813{
0545a864
JH
2814 int check_okay = 0; /* able to do all the required sys/libcalls */
2815 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2816/*
ad27e871 2817 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2818 * fstatvfs() is UNIX98.
0545a864 2819 * fstatfs() is 4.3 BSD.
ad27e871 2820 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
2821 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2822 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
2823 */
2824
6439433f
JH
2825#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2826
2827# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2828 defined(HAS_FSTATVFS)
2829# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2830 struct statvfs stfs;
6439433f 2831
104d25b7
JH
2832 check_okay = fstatvfs(fd, &stfs) == 0;
2833 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2834# endif /* fstatvfs */
ac27b0f5 2835
6439433f
JH
2836# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2837 defined(PERL_MOUNT_NOSUID) && \
2838 defined(HAS_FSTATFS) && \
2839 defined(HAS_STRUCT_STATFS) && \
2840 defined(HAS_STRUCT_STATFS_F_FLAGS)
2841# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2842 struct statfs stfs;
6439433f 2843
104d25b7 2844 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2845 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH
2846# endif /* fstatfs */
2847
2848# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2849 defined(PERL_MOUNT_NOSUID) && \
2850 defined(HAS_FSTAT) && \
2851 defined(HAS_USTAT) && \
2852 defined(HAS_GETMNT) && \
2853 defined(HAS_STRUCT_FS_DATA) && \
2854 defined(NOSTAT_ONE)
2855# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2856 struct stat fdst;
6439433f 2857
0545a864 2858 if (fstat(fd, &fdst) == 0) {
6439433f
JH
2859 struct ustat us;
2860 if (ustat(fdst.st_dev, &us) == 0) {
2861 struct fs_data fsd;
2862 /* NOSTAT_ONE here because we're not examining fields which
2863 * vary between that case and STAT_ONE. */
ad27e871 2864 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
2865 size_t cmplen = sizeof(us.f_fname);
2866 if (sizeof(fsd.fd_req.path) < cmplen)
2867 cmplen = sizeof(fsd.fd_req.path);
2868 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2869 fdst.st_dev == fsd.fd_req.dev) {
2870 check_okay = 1;
2871 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2872 }
2873 }
2874 }
2875 }
0545a864 2876 }
6439433f
JH
2877# endif /* fstat+ustat+getmnt */
2878
2879# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2880 defined(HAS_GETMNTENT) && \
2881 defined(HAS_HASMNTOPT) && \
2882 defined(MNTOPT_NOSUID)
2883# define FD_ON_NOSUID_CHECK_OKAY
2884 FILE *mtab = fopen("/etc/mtab", "r");
2885 struct mntent *entry;
2886 struct stat stb, fsb;
104d25b7
JH
2887
2888 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
2889 while (entry = getmntent(mtab)) {
2890 if (stat(entry->mnt_dir, &fsb) == 0
2891 && fsb.st_dev == stb.st_dev)
2892 {
2893 /* found the filesystem */
2894 check_okay = 1;
2895 if (hasmntopt(entry, MNTOPT_NOSUID))
2896 on_nosuid = 1;
2897 break;
2898 } /* A single fs may well fail its stat(). */
2899 }
104d25b7
JH
2900 }
2901 if (mtab)
6439433f
JH
2902 fclose(mtab);
2903# endif /* getmntent+hasmntopt */
0545a864 2904
ac27b0f5 2905 if (!check_okay)
0545a864 2906 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH
2907 return on_nosuid;
2908}
2909#endif /* IAMSUID */
2910
76e3520e 2911STATIC void
cea2e8a9 2912S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2913{
155aba94 2914#ifdef IAMSUID
96436eeb 2915 int which;
155aba94 2916#endif
96436eeb 2917
13281fa4
LW
2918 /* do we need to emulate setuid on scripts? */
2919
2920 /* This code is for those BSD systems that have setuid #! scripts disabled
2921 * in the kernel because of a security problem. Merely defining DOSUID
2922 * in perl will not fix that problem, but if you have disabled setuid
2923 * scripts in the kernel, this will attempt to emulate setuid and setgid
2924 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
2925 * root version must be called suidperl or sperlN.NNN. If regular perl
2926 * discovers that it has opened a setuid script, it calls suidperl with
2927 * the same argv that it had. If suidperl finds that the script it has
2928 * just opened is NOT setuid root, it sets the effective uid back to the
2929 * uid. We don't just make perl setuid root because that loses the
2930 * effective uid we had before invoking perl, if it was different from the
2931 * uid.
13281fa4
LW
2932 *
2933 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2934 * be defined in suidperl only. suidperl must be setuid root. The
2935 * Configure script will set this up for you if you want it.
2936 */
a687059c 2937
13281fa4 2938#ifdef DOSUID
6e72f9df 2939 char *s, *s2;
a0d0e21e 2940
b28d0864 2941 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2942 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2943 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2944 I32 len;
2d8e6c8d 2945 STRLEN n_a;
13281fa4 2946
a687059c 2947#ifdef IAMSUID
fe14fcc3 2948#ifndef HAS_SETREUID
a687059c
LW
2949 /* On this access check to make sure the directories are readable,
2950 * there is actually a small window that the user could use to make
2951 * filename point to an accessible directory. So there is a faint
2952 * chance that someone could execute a setuid script down in a
2953 * non-accessible directory. I don't know what to do about that.
2954 * But I don't think it's too important. The manual lies when
2955 * it says access() is useful in setuid programs.
2956 */
cc49e20b 2957 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2958 Perl_croak(aTHX_ "Permission denied");
a687059c
LW
2959#else
2960 /* If we can swap euid and uid, then we can determine access rights
2961 * with a simple stat of the file, and then compare device and
2962 * inode to make sure we did stat() on the same file we opened.
2963 * Then we just have to make sure he or she can execute it.
2964 */
2965 {
2966 struct stat tmpstatbuf;
2967
85e6fe83
LW
2968 if (
2969#ifdef HAS_SETREUID
b28d0864 2970 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW
2971#else
2972# if HAS_SETRESUID
b28d0864 2973 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 2974# endif
85e6fe83 2975#endif
b28d0864 2976 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 2977 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 2978 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 2979 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 2980#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 2981 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 2982 Perl_croak(aTHX_ "Permission denied");
104d25b7 2983#endif
b28d0864
NIS
2984 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
2985 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
2986 (void)PerlIO_close(PL_rsfp);
cea2e8a9 2987 Perl_croak(aTHX_ "Permission denied\n");
a687059c 2988 }
85e6fe83
LW
2989 if (
2990#ifdef HAS_SETREUID
b28d0864 2991 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW
2992#else
2993# if defined(HAS_SETRESUID)
b28d0864 2994 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 2995# endif
85e6fe83 2996#endif
b28d0864 2997 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 2998 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 2999 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3000 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3001 }
fe14fcc3 3002#endif /* HAS_SETREUID */
a687059c
LW
3003#endif /* IAMSUID */
3004
b28d0864 3005 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3006 Perl_croak(aTHX_ "Permission denied");
b28d0864 3007 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3008 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3009 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3010 CopLINE_inc(PL_curcop);
6b88bc9c 3011 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3012 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3013 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3014 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3015 if (*s == ' ') s++;
45d8adaa 3016 while (!isSPACE(*s)) s++;
2d8e6c8d 3017 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df
PP
3018 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3019 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3020 Perl_croak(aTHX_ "Not a perl script");
a687059c 3021 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3022 /*
3023 * #! arg must be what we saw above. They can invoke it by
3024 * mentioning suidperl explicitly, but they may not add any strange
3025 * arguments beyond what #! says if they do invoke suidperl that way.
3026 */
3027 len = strlen(validarg);
3028 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3029 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3030 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW
3031
3032#ifndef IAMSUID
b28d0864
NIS
3033 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3034 PL_euid == PL_statbuf.st_uid)
3035 if (!PL_do_undump)
cea2e8a9 3036 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3037FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3038#endif /* IAMSUID */
13281fa4 3039
b28d0864
NIS
3040 if (PL_euid) { /* oops, we're not the setuid root perl */
3041 (void)PerlIO_close(PL_rsfp);
13281fa4 3042#ifndef IAMSUID
46fc3d4c 3043 /* try again */
a7cb1f99 3044 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3045 (int)PERL_REVISION, (int)PERL_VERSION,
3046 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3047#endif
cea2e8a9 3048 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
3049 }
3050
b28d0864 3051 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3052#ifdef HAS_SETEGID
b28d0864 3053 (void)setegid(PL_statbuf.st_gid);
a687059c 3054#else
fe14fcc3 3055#ifdef HAS_SETREGID
b28d0864 3056 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW
3057#else
3058#ifdef HAS_SETRESGID
b28d0864 3059 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3060#else
b28d0864 3061 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW
3062#endif
3063#endif
85e6fe83 3064#endif
b28d0864 3065 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3066 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3067 }
b28d0864
NIS
3068 if (PL_statbuf.st_mode & S_ISUID) {
3069 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3070#ifdef HAS_SETEUID
b28d0864 3071 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3072#else
fe14fcc3 3073#ifdef HAS_SETREUID
b28d0864 3074 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW
3075#else
3076#ifdef HAS_SETRESUID
b28d0864 3077 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3078#else
b28d0864 3079 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW
3080#endif
3081#endif
85e6fe83 3082#endif
b28d0864 3083 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3084 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3085 }
b28d0864 3086 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3087#ifdef HAS_SETEUID
b28d0864 3088 (void)seteuid((Uid_t)PL_uid);
a687059c 3089#else
fe14fcc3 3090#ifdef HAS_SETREUID
b28d0864 3091 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3092#else
85e6fe83 3093#ifdef HAS_SETRESUID
b28d0864 3094 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3095#else
b28d0864 3096 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3097#endif
a687059c
LW
3098#endif
3099#endif
b28d0864 3100 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3101 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3102 }
748a9306 3103 init_ids();
b28d0864 3104 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3105 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW
3106 }
3107#ifdef IAMSUID
6b88bc9c 3108 else if (PL_preprocess)
cea2e8a9 3109 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3110 else if (fdscript >= 0)
cea2e8a9 3111 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3112 else
cea2e8a9 3113 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb
PP
3114
3115 /* We absolutely must clear out any saved ids here, so we */
3116 /* exec the real perl, substituting fd script for scriptname. */
3117 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS
3118 PerlIO_rewind(PL_rsfp);
3119 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS
3120 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3121 if (!PL_origargv[which])
cea2e8a9
GS
3122 Perl_croak(aTHX_ "Permission denied");
3123 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3124 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3125#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3126 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3127#endif
a7cb1f99 3128 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3129 (int)PERL_REVISION, (int)PERL_VERSION,
3130 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3131 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3132#endif /* IAMSUID */
a687059c 3133#else /* !DOSUID */
3280af22 3134 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3135#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS
3136 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3137 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3138 ||
b28d0864 3139 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3140 )
b28d0864 3141 if (!PL_do_undump)
cea2e8a9 3142 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3143FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3144#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3145 /* not set-id, must be wrapped */
a687059c 3146 }
13281fa4 3147#endif /* DOSUID */
79072805 3148}
13281fa4 3149
76e3520e 3150STATIC void
cea2e8a9 3151S_find_beginning(pTHX)
79072805 3152{
6e72f9df 3153 register char *s, *s2;
33b78306
LW
3154
3155 /* skip forward in input to the real script? */
3156
bbce6d69 3157 forbid_setid("-x");
bf4acbe4 3158#ifdef MACOS_TRADITIONAL
084592ab 3159 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3160
bf4acbe4
GS
3161 while (PL_doextract || gMacPerl_AlwaysExtract) {
3162 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3163 if (!gMacPerl_AlwaysExtract)
3164 Perl_croak(aTHX_ "No Perl script found in input\n");
3165
3166 if (PL_doextract) /* require explicit override ? */
3167 if (!OverrideExtract(PL_origfilename))
3168 Perl_croak(aTHX_ "User aborted script\n");
3169 else
3170 PL_doextract = FALSE;
3171
3172 /* Pater peccavi, file does not have #! */
3173 PerlIO_rewind(PL_rsfp);
ac27b0f5 3174
bf4acbe4
GS
3175 break;
3176 }
3177#else
3280af22
NIS
3178 while (PL_doextract) {
3179 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3180 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3181#endif
4f0c37ba
IZ
3182 s2 = s;
3183 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS
3184 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3185 PL_doextract = FALSE;
6e72f9df
PP
3186 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3187 s2 = s;
3188 while (*s == ' ' || *s == '\t') s++;
3189 if (*s++ == '-') {
3190 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3191 if (strnEQ(s2-4,"perl",4))
3192 /*SUPPRESS 530*/
155aba94
GS
3193 while ((s = moreswitches(s)))
3194 ;
33b78306 3195 }
95e8664e
CN
3196#ifdef MACOS_TRADITIONAL
3197 break;
3198#endif
83025b21
LW
3199 }
3200 }
3201}
3202
afe37c7d 3203
76e3520e 3204STATIC void
cea2e8a9 3205S_init_ids(pTHX)
352d5a3a 3206{
d8eceb89
JH
3207 PL_uid = PerlProc_getuid();
3208 PL_euid = PerlProc_geteuid();
3209 PL_gid = PerlProc_getgid();
3210 PL_egid = PerlProc_getegid();
748a9306 3211#ifdef VMS
b28d0864
NIS
3212 PL_uid |= PL_gid << 16;
3213 PL_euid |= PL_egid << 16;
748a9306 3214#endif
3280af22 3215 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3216}
79072805 3217
76e3520e 3218STATIC void
cea2e8a9 3219S_forbid_setid(pTHX_ char *s)
bbce6d69 3220{
3280af22 3221 if (PL_euid != PL_uid)
cea2e8a9 3222 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3223 if (PL_egid != PL_gid)
cea2e8a9 3224 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69
PP
3225}
3226
1ee4443e
IZ
3227void
3228Perl_init_debugger(pTHX)
748a9306 3229{
1ee4443e
IZ
3230 HV *ostash = PL_curstash;
3231
3280af22
NIS
3232 PL_curstash = PL_debstash;
3233 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3234 AvREAL_off(PL_dbargs);
3235 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3236 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3237 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3238 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3239 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3240 sv_setiv(PL_DBsingle, 0);
3280af22 3241 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3242 sv_setiv(PL_DBtrace, 0);
3280af22 3243 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3244 sv_setiv(PL_DBsignal, 0);
1ee4443e 3245 PL_curstash = ostash;
352d5a3a
LW
3246}
3247
2ce36478
SM
3248#ifndef STRESS_REALLOC
3249#define REASONABLE(size) (size)
3250#else
3251#define REASONABLE(size) (1) /* unreasonable */
3252#endif
3253
11343788 3254void
cea2e8a9 3255Perl_init_stacks(pTHX)
79072805 3256{
e336de0d 3257 /* start with 128-item stack and 8K cxstack */
3280af22 3258 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3259 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS
3260 PL_curstackinfo->si_type = PERLSI_MAIN;
3261 PL_curstack = PL_curstackinfo->si_stack;
3262 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3263
3280af22
NIS
3264 PL_stack_base = AvARRAY(PL_curstack);
3265 PL_stack_sp = PL_stack_base;
3266 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3267
3280af22
NIS
3268 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3269 PL_tmps_floor = -1;
3270 PL_tmps_ix = -1;
3271 PL_tmps_max = REASONABLE(128);
8990e307 3272
3280af22
NIS
3273 New(54,PL_markstack,REASONABLE(32),I32);
3274 PL_markstack_ptr = PL_markstack;
3275 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3276
ce2f7c3b 3277 SET_MARK_OFFSET;
e336de0d 3278
3280af22
NIS
3279 New(54,PL_scopestack,REASONABLE(32),I32);
3280 PL_scopestack_ix = 0;
3281 PL_scopestack_max = REASONABLE(32);
79072805 3282
3280af22
NIS
3283 New(54,PL_savestack,REASONABLE(128),ANY);
3284 PL_savestack_ix = 0;
3285 PL_savestack_max = REASONABLE(128);
79072805 3286
3280af22
NIS
3287 New(54,PL_retstack,REASONABLE(16),OP*);
3288 PL_retstack_ix = 0;
3289 PL_retstack_max = REASONABLE(16);
378cc40b 3290}
33b78306 3291
2ce36478
SM
3292#undef REASONABLE
3293
76e3520e 3294STATIC void
cea2e8a9 3295S_nuke_stacks(pTHX)
6e72f9df 3296{
3280af22
NIS
3297 while (PL_curstackinfo->si_next)
3298 PL_curstackinfo = PL_curstackinfo->si_next;
3299 while (PL_curstackinfo) {
3300 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3301 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS
3302 Safefree(PL_curstackinfo->si_cxstack);
3303 Safefree(PL_curstackinfo);
3304 PL_curstackinfo = p;
e336de0d 3305 }
3280af22
NIS
3306 Safefree(PL_tmps_stack);
3307 Safefree(PL_markstack);
3308 Safefree(PL_scopestack);
3309 Safefree(PL_savestack);
3310 Safefree(PL_retstack);
378cc40b 3311}
33b78306 3312
76e3520e 3313STATIC void
cea2e8a9 3314S_init_lexer(pTHX)
8990e307 3315{
06039172 3316 PerlIO *tmpfp;
3280af22
NIS
3317 tmpfp = PL_rsfp;
3318 PL_rsfp = Nullfp;
3319 lex_start(PL_linestr);
3320 PL_rsfp = tmpfp;
79cb57f6 3321 PL_subname = newSVpvn("main",4);
8990e307
LW
3322}
3323
76e3520e 3324STATIC void
cea2e8a9 3325S_init_predump_symbols(pTHX)
45d8adaa 3326{
93a17b20 3327 GV *tmpgv;
af8c498a 3328 IO *io;
79072805 3329
864dbfa3 3330 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS
3331 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3332 GvMULTI_on(PL_stdingv);
af8c498a 3333 io = GvIOp(PL_stdingv);
a04651f4 3334 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3335 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3336 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3337 GvMULTI_on(tmpgv);
af8c498a 3338 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3339
85e6fe83 3340 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3341 GvMULTI_on(tmpgv);
af8c498a 3342 io = GvIOp(tmpgv);
a04651f4 3343 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3344 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3345 setdefout(tmpgv);
adbc6bb1 3346 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3347 GvMULTI_on(tmpgv);
af8c498a 3348 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3349
bf49b057
GS
3350 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3351 GvMULTI_on(PL_stderrgv);
3352 io = GvIOp(PL_stderrgv);
a04651f4 3353 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3354 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3355 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3356 GvMULTI_on(tmpgv);
af8c498a 3357 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3358
3280af22 3359 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3360
bf4acbe4
GS
3361 if (PL_osname)
3362 Safefree(PL_osname);
3363 PL_osname = savepv(OSNAME);
79072805 3364}
33b78306 3365
76e3520e 3366STATIC void
cea2e8a9 3367S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
33b78306 3368{
79072805
LW
3369 char *s;
3370 SV *sv;
3371 GV* tmpgv;
9cbac4c7 3372#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
516a5887 3373 char **dup_env_base = 0;
103a7189 3374 int dup_env_count = 0;
9cbac4c7 3375#endif
fe14fcc3 3376
79072805 3377 argc--,argv++; /* skip name of script */
3280af22 3378 if (PL_doswitches) {
79072805
LW
3379 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3380 if (!argv[0][1])
3381 break;
379d538a 3382 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW
3383 argc--,argv++;
3384 break;
3385 }
155aba94 3386 if ((s = strchr(argv[0], '='))) {
79072805 3387 *s++ = '\0';
85e6fe83 3388 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW
3389 }
3390 else
85e6fe83 3391 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3392 }
79072805 3393 }
3280af22
NIS
3394 PL_toptarget = NEWSV(0,0);
3395 sv_upgrade(PL_toptarget, SVt_PVFM);
3396 sv_setpvn(PL_toptarget, "", 0);
3397 PL_bodytarget = NEWSV(0,0);
3398 sv_upgrade(PL_bodytarget, SVt_PVFM);
3399 sv_setpvn(PL_bodytarget, "", 0);
3400 PL_formtarget = PL_bodytarget;
79072805 3401
bbce6d69 3402 TAINT;
155aba94 3403 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS
3404#ifdef MACOS_TRADITIONAL
3405 /* $0 is not majick on a Mac */
3406 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3407#else
3280af22 3408 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3409 magicname("0", "0", 1);
bf4acbe4 3410#endif
79072805 3411 }
155aba94 3412 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV)))
ed344e4f 3413#ifdef OS2
23da6c43 3414 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
ed344e4f 3415#else
3280af22 3416 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
ed344e4f 3417#endif
155aba94 3418 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3280af22
NIS
3419 GvMULTI_on(PL_argvgv);
3420 (void)gv_AVadd(PL_argvgv);
3421 av_clear(GvAVn(PL_argvgv));
79072805 3422 for (; argc > 0; argc--,argv++) {
729a02f2
GS
3423 SV *sv = newSVpv(argv[0],0);
3424 av_push(GvAVn(PL_argvgv),sv);
3425 if (PL_widesyscalls)
e84ff256 3426 (void)sv_utf8_decode(sv);
79072805
LW
3427 }
3428 }
155aba94 3429 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
79072805 3430 HV *hv;
3280af22
NIS
3431 GvMULTI_on(PL_envgv);
3432 hv = GvHVn(PL_envgv);
14befaf4 3433 hv_magic(hv, Nullgv, PERL_MAGIC_env);
fa6a1c44 3434#ifdef USE_ENVIRON_ARRAY
4633a7c4
LW
3435 /* Note that if the supplied env parameter is actually a copy
3436 of the global environ then it may now point to free'd memory
3437 if the environment has been modified since. To avoid this
3438 problem we treat env==NULL as meaning 'use the default'
3439 */
3440 if (!env)
3441 env = environ;
5aabfad6 3442 if (env != environ)
79072805 3443 environ[0] = Nullch;
103a7189
JH
3444#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
3445 {
3446 char **env_base;
9041c2e3 3447 for (env_base = env; *env; env++)
103a7189
JH
3448 dup_env_count++;
3449 if ((dup_env_base = (char **)
480bfd1e 3450 safesysmalloc( sizeof(char *) * (dup_env_count+1) ))) {
103a7189
JH
3451 char **dup_env;
3452 for (env = env_base, dup_env = dup_env_base;
3453 *env;
480bfd1e
JH
3454 env++, dup_env++) {
3455 /* With environ one needs to use safesysmalloc(). */
3456 *dup_env = safesysmalloc(strlen(*env) + 1);
3457 (void)strcpy(*dup_env, *env);
3458 }
103a7189
JH
3459 *dup_env = Nullch;
3460 env = dup_env_base;
3461