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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
7114a2d2 24#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
20ce7b12 25char *getenv (char *); /* Usually in <stdlib.h> */
54310121
PP
26#endif
27
acfe0abc 28static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
0cb96387 29
a687059c
LW
30#ifdef IAMSUID
31#ifndef DOSUID
32#define DOSUID
33#endif
34#endif
378cc40b 35
a687059c
LW
36#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
37#ifdef DOSUID
38#undef DOSUID
39#endif
40#endif
8d063cd8 41
4d1ff10f 42#if defined(USE_5005THREADS)
06d86050
GS
43# define INIT_TLS_AND_INTERP \
44 STMT_START { \
45 if (!PL_curinterp) { \
46 PERL_SET_INTERP(my_perl); \
47 INIT_THREADS; \
48 ALLOC_THREAD_KEY; \
49 } \
50 } STMT_END
51#else
52# if defined(USE_ITHREADS)
53# define INIT_TLS_AND_INTERP \
54 STMT_START { \
55 if (!PL_curinterp) { \
56 PERL_SET_INTERP(my_perl); \
57 INIT_THREADS; \
58 ALLOC_THREAD_KEY; \
534825c4
GS
59 PERL_SET_THX(my_perl); \
60 OP_REFCNT_INIT; \
61 } \
62 else { \
63 PERL_SET_THX(my_perl); \
06d86050 64 } \
06d86050
GS
65 } STMT_END
66# else
67# define INIT_TLS_AND_INTERP \
68 STMT_START { \
69 if (!PL_curinterp) { \
70 PERL_SET_INTERP(my_perl); \
71 } \
72 PERL_SET_THX(my_perl); \
73 } STMT_END
74# endif
75#endif
76
32e30700
GS
77#ifdef PERL_IMPLICIT_SYS
78PerlInterpreter *
7766f137
GS
79perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
80 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
32e30700
GS
81 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
82 struct IPerlDir* ipD, struct IPerlSock* ipS,
83 struct IPerlProc* ipP)
84{
85 PerlInterpreter *my_perl;
32e30700
GS
86 /* New() needs interpreter, so call malloc() instead */
87 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 88 INIT_TLS_AND_INTERP;
32e30700
GS
89 Zero(my_perl, 1, PerlInterpreter);
90 PL_Mem = ipM;
7766f137
GS
91 PL_MemShared = ipMS;
92 PL_MemParse = ipMP;
32e30700
GS
93 PL_Env = ipE;
94 PL_StdIO = ipStd;
95 PL_LIO = ipLIO;
96 PL_Dir = ipD;
97 PL_Sock = ipS;
98 PL_Proc = ipP;
7766f137 99
32e30700
GS
100 return my_perl;
101}
102#else
954c1994
GS
103
104/*
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
3a1ee7e8 261 PerlIO_init(aTHX); /* 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
56a2bab7
NIS
462#if defined(PERLIO_LAYERS)
463 /* No more IO - including error messages ! */
464 PerlIO_cleanup(aTHX);
465#endif
466
a0d0e21e 467 /* The exit() function will do everything that needs doing. */
31d77e54 468 return STATUS_NATIVE_EXPORT;;
a0d0e21e 469 }
5dd60ef7 470
551a8b83
JH
471 /* jettison our possibly duplicated environment */
472
473#ifdef USE_ENVIRON_ARRAY
474 if (environ != PL_origenviron) {
475 I32 i;
476
477 for (i = 0; environ[i]; i++)
4b420006 478 safesysfree(environ[i]);
0631ea03 479
4b420006
JH
480 /* Must use safesysfree() when working with environ. */
481 safesysfree(environ);
551a8b83
JH
482
483 environ = PL_origenviron;
484 }
485#endif
486
5f8cb046
DM
487#ifdef USE_ITHREADS
488 /* the syntax tree is shared between clones
489 * so op_free(PL_main_root) only ReREFCNT_dec's
490 * REGEXPs in the parent interpreter
491 * we need to manually ReREFCNT_dec for the clones
492 */
493 {
494 I32 i = AvFILLp(PL_regex_padav) + 1;
495 SV **ary = AvARRAY(PL_regex_padav);
496
497 while (i) {
35061a7e 498 SV *resv = ary[--i];
ba89bb6e 499 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM
500
501 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 502 /* this is PL_reg_curpm, already freed
35061a7e
DM
503 * flag is set in regexec.c:S_regtry
504 */
505 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 506 }
1cc8b4c5
AB
507 else if(SvREPADTMP(resv)) {
508 SvREPADTMP_off(resv);
509 }
35061a7e 510 else {
5f8cb046
DM
511 ReREFCNT_dec(re);
512 }
513 }
514 }
515 SvREFCNT_dec(PL_regex_padav);
516 PL_regex_padav = Nullav;
517 PL_regex_pad = NULL;
518#endif
519
5f05dabc
PP
520 /* loosen bonds of global variables */
521
3280af22
NIS
522 if(PL_rsfp) {
523 (void)PerlIO_close(PL_rsfp);
524 PL_rsfp = Nullfp;
8ebc5c01
PP
525 }
526
527 /* Filters for program text */
3280af22
NIS
528 SvREFCNT_dec(PL_rsfp_filters);
529 PL_rsfp_filters = Nullav;
8ebc5c01
PP
530
531 /* switches */
3280af22
NIS
532 PL_preprocess = FALSE;
533 PL_minus_n = FALSE;
534 PL_minus_p = FALSE;
535 PL_minus_l = FALSE;
536 PL_minus_a = FALSE;
537 PL_minus_F = FALSE;
538 PL_doswitches = FALSE;
599cee73 539 PL_dowarn = G_WARN_OFF;
3280af22
NIS
540 PL_doextract = FALSE;
541 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
542 PL_unsafe = FALSE;
543
544 Safefree(PL_inplace);
545 PL_inplace = Nullch;
a7cb1f99 546 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
547
548 if (PL_e_script) {
549 SvREFCNT_dec(PL_e_script);
550 PL_e_script = Nullsv;
8ebc5c01
PP
551 }
552
bc0a45ed
DM
553 while (--PL_origargc >= 0) {
554 Safefree(PL_origargv[PL_origargc]);
555 }
556 Safefree(PL_origargv);
557
8ebc5c01
PP
558 /* magical thingies */
559
7889fe52
NIS
560 SvREFCNT_dec(PL_ofs_sv); /* $, */
561 PL_ofs_sv = Nullsv;
5f05dabc 562
7889fe52
NIS
563 SvREFCNT_dec(PL_ors_sv); /* $\ */
564 PL_ors_sv = Nullsv;
8ebc5c01 565
3280af22
NIS
566 SvREFCNT_dec(PL_rs); /* $/ */
567 PL_rs = Nullsv;
dc92893f 568
d33b2eba
GS
569 PL_multiline = 0; /* $* */
570 Safefree(PL_osname); /* $^O */
571 PL_osname = Nullch;
5f05dabc 572
3280af22
NIS
573 SvREFCNT_dec(PL_statname);
574 PL_statname = Nullsv;
575 PL_statgv = Nullgv;
5f05dabc 576
8ebc5c01
PP
577 /* defgv, aka *_ should be taken care of elsewhere */
578
8ebc5c01 579 /* clean up after study() */
3280af22
NIS
580 SvREFCNT_dec(PL_lastscream);
581 PL_lastscream = Nullsv;
582 Safefree(PL_screamfirst);
583 PL_screamfirst = 0;
584 Safefree(PL_screamnext);
585 PL_screamnext = 0;
8ebc5c01 586
7d5ea4e7
GS
587 /* float buffer */
588 Safefree(PL_efloatbuf);
589 PL_efloatbuf = Nullch;
590 PL_efloatsize = 0;
591
8ebc5c01 592 /* startup and shutdown function lists */
3280af22 593 SvREFCNT_dec(PL_beginav);
5a837c8f 594 SvREFCNT_dec(PL_beginav_save);
3280af22 595 SvREFCNT_dec(PL_endav);
7d30b5c4 596 SvREFCNT_dec(PL_checkav);
3280af22
NIS
597 SvREFCNT_dec(PL_initav);
598 PL_beginav = Nullav;
5a837c8f 599 PL_beginav_save = Nullav;
3280af22 600 PL_endav = Nullav;
7d30b5c4 601 PL_checkav = Nullav;
3280af22 602 PL_initav = Nullav;
5618dfe8 603
8ebc5c01 604 /* shortcuts just get cleared */
3280af22 605 PL_envgv = Nullgv;
3280af22
NIS
606 PL_incgv = Nullgv;
607 PL_hintgv = Nullgv;
608 PL_errgv = Nullgv;
609 PL_argvgv = Nullgv;
610 PL_argvoutgv = Nullgv;
611 PL_stdingv = Nullgv;
bf49b057 612 PL_stderrgv = Nullgv;
3280af22
NIS
613 PL_last_in_gv = Nullgv;
614 PL_replgv = Nullgv;
5c831c24 615 PL_debstash = Nullhv;
8ebc5c01
PP
616
617 /* reset so print() ends up where we expect */
618 setdefout(Nullgv);
5c831c24 619
7a1c5554
GS
620 SvREFCNT_dec(PL_argvout_stack);
621 PL_argvout_stack = Nullav;
8ebc5c01 622
5c831c24
GS
623 SvREFCNT_dec(PL_modglobal);
624 PL_modglobal = Nullhv;
625 SvREFCNT_dec(PL_preambleav);
626 PL_preambleav = Nullav;
627 SvREFCNT_dec(PL_subname);
628 PL_subname = Nullsv;
629 SvREFCNT_dec(PL_linestr);
630 PL_linestr = Nullsv;
631 SvREFCNT_dec(PL_pidstatus);
632 PL_pidstatus = Nullhv;
633 SvREFCNT_dec(PL_toptarget);
634 PL_toptarget = Nullsv;
635 SvREFCNT_dec(PL_bodytarget);
636 PL_bodytarget = Nullsv;
637 PL_formtarget = Nullsv;
638
d33b2eba 639 /* free locale stuff */
b9582b6a 640#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
641 Safefree(PL_collation_name);
642 PL_collation_name = Nullch;
b9582b6a 643#endif
d33b2eba 644
b9582b6a 645#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
646 Safefree(PL_numeric_name);
647 PL_numeric_name = Nullch;
a453c169 648 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 649#endif
d33b2eba 650
5c831c24
GS
651 /* clear utf8 character classes */
652 SvREFCNT_dec(PL_utf8_alnum);
653 SvREFCNT_dec(PL_utf8_alnumc);
654 SvREFCNT_dec(PL_utf8_ascii);
655 SvREFCNT_dec(PL_utf8_alpha);
656 SvREFCNT_dec(PL_utf8_space);
657 SvREFCNT_dec(PL_utf8_cntrl);
658 SvREFCNT_dec(PL_utf8_graph);
659 SvREFCNT_dec(PL_utf8_digit);
660 SvREFCNT_dec(PL_utf8_upper);
661 SvREFCNT_dec(PL_utf8_lower);
662 SvREFCNT_dec(PL_utf8_print);
663 SvREFCNT_dec(PL_utf8_punct);
664 SvREFCNT_dec(PL_utf8_xdigit);
665 SvREFCNT_dec(PL_utf8_mark);
666 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 667 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 668 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 669 SvREFCNT_dec(PL_utf8_tofold);
5c831c24
GS
670 PL_utf8_alnum = Nullsv;
671 PL_utf8_alnumc = Nullsv;
672 PL_utf8_ascii = Nullsv;
673 PL_utf8_alpha = Nullsv;
674 PL_utf8_space = Nullsv;
675 PL_utf8_cntrl = Nullsv;
676 PL_utf8_graph = Nullsv;
677 PL_utf8_digit = Nullsv;
678 PL_utf8_upper = Nullsv;
679 PL_utf8_lower = Nullsv;
680 PL_utf8_print = Nullsv;
681 PL_utf8_punct = Nullsv;
682 PL_utf8_xdigit = Nullsv;
683 PL_utf8_mark = Nullsv;
684 PL_utf8_toupper = Nullsv;
685 PL_utf8_totitle = Nullsv;
686 PL_utf8_tolower = Nullsv;
b4e400f9 687 PL_utf8_tofold = Nullsv;
5c831c24 688
971a9dd3
GS
689 if (!specialWARN(PL_compiling.cop_warnings))
690 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 691 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
692 if (!specialCopIO(PL_compiling.cop_io))
693 SvREFCNT_dec(PL_compiling.cop_io);
694 PL_compiling.cop_io = Nullsv;
f4dd75d9
GS
695#ifdef USE_ITHREADS
696 Safefree(CopFILE(&PL_compiling));
697 CopFILE(&PL_compiling) = Nullch;
698 Safefree(CopSTASHPV(&PL_compiling));
699#else
01724ea0 700 SvREFCNT_dec(CopFILEGV(&PL_compiling));
f4dd75d9
GS
701 CopFILEGV(&PL_compiling) = Nullgv;
702 /* cop_stash is not refcounted */
01724ea0 703#endif
5c831c24 704
a0d0e21e 705 /* Prepare to destruct main symbol table. */
5f05dabc 706
3280af22
NIS
707 hv = PL_defstash;
708 PL_defstash = 0;
a0d0e21e 709 SvREFCNT_dec(hv);
5c831c24
GS
710 SvREFCNT_dec(PL_curstname);
711 PL_curstname = Nullsv;
a0d0e21e 712
5a844595
GS
713 /* clear queued errors */
714 SvREFCNT_dec(PL_errors);
715 PL_errors = Nullsv;
716
a0d0e21e 717 FREETMPS;
0453d815 718 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 719 if (PL_scopestack_ix != 0)
0453d815
PM
720 Perl_warner(aTHX_ WARN_INTERNAL,
721 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
722 (long)PL_scopestack_ix);
723 if (PL_savestack_ix != 0)
0453d815
PM
724 Perl_warner(aTHX_ WARN_INTERNAL,
725 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
726 (long)PL_savestack_ix);
727 if (PL_tmps_floor != -1)
0453d815 728 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 729 (long)PL_tmps_floor + 1);
a0d0e21e 730 if (cxstack_ix != -1)
0453d815 731 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 732 (long)cxstack_ix + 1);
a0d0e21e 733 }
8990e307
LW
734
735 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 736 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 737 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
738
739 /* the 2 is for PL_fdpid and PL_strtab */
740 while (PL_sv_count > 2 && sv_clean_all())
741 ;
742
d33b2eba
GS
743 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
744 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
745 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
746 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 747
d4777f27
GS
748 AvREAL_off(PL_fdpid); /* no surviving entries */
749 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
750 PL_fdpid = Nullav;
751
6c644e78
GS
752#ifdef HAVE_INTERP_INTERN
753 sys_intern_clear();
754#endif
755
6e72f9df
PP
756 /* Destruct the global string table. */
757 {
758 /* Yell and reset the HeVAL() slots that are still holding refcounts,
759 * so that sv_free() won't fail on them.
760 */
761 I32 riter;
762 I32 max;
763 HE *hent;
764 HE **array;
765
766 riter = 0;
3280af22
NIS
767 max = HvMAX(PL_strtab);
768 array = HvARRAY(PL_strtab);
6e72f9df
PP
769 hent = array[0];
770 for (;;) {
0453d815
PM
771 if (hent && ckWARN_d(WARN_INTERNAL)) {
772 Perl_warner(aTHX_ WARN_INTERNAL,
773 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
774 HeVAL(hent) - Nullsv, HeKEY(hent));
775 HeVAL(hent) = Nullsv;
776 hent = HeNEXT(hent);
777 }
778 if (!hent) {
779 if (++riter > max)
780 break;
781 hent = array[riter];
782 }
783 }
784 }
3280af22 785 SvREFCNT_dec(PL_strtab);
6e72f9df 786
e652bb2f 787#ifdef USE_ITHREADS
a0739874
DM
788 /* free the pointer table used for cloning */
789 ptr_table_free(PL_ptr_table);
53186e96 790#endif
a0739874 791
d33b2eba
GS
792 /* free special SVs */
793
794 SvREFCNT(&PL_sv_yes) = 0;
795 sv_clear(&PL_sv_yes);
796 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 797 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
798
799 SvREFCNT(&PL_sv_no) = 0;
800 sv_clear(&PL_sv_no);
801 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 802 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS
803
804 SvREFCNT(&PL_sv_undef) = 0;
805 SvREADONLY_off(&PL_sv_undef);
d33b2eba 806
0453d815
PM
807 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
808 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 809
56a2bab7 810#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
811 /* No more IO - including error messages ! */
812 PerlIO_cleanup(aTHX);
813#endif
814
3280af22 815 Safefree(PL_origfilename);
3280af22 816 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ
817 if (PL_reg_curpm)
818 Safefree(PL_reg_curpm);
82ba1be6 819 Safefree(PL_reg_poscache);
3280af22
NIS
820 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
821 Safefree(PL_op_mask);
cf36064f
GS
822 Safefree(PL_psig_ptr);
823 Safefree(PL_psig_name);
2c2666fc 824 Safefree(PL_bitcount);
ce08f86c 825 Safefree(PL_psig_pend);
6e72f9df 826 nuke_stacks();
3280af22 827 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 828
a0d0e21e 829 DEBUG_P(debprofdump());
4d1ff10f 830#ifdef USE_5005THREADS
5f08fbcd 831 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS
832 MUTEX_DESTROY(&PL_sv_mutex);
833 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 834 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 835 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 836 COND_DESTROY(&PL_eval_cond);
11d617a5
GS
837#ifdef EMULATE_ATOMIC_REFCOUNTS
838 MUTEX_DESTROY(&PL_svref_mutex);
839#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 840
8023c3ce 841 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS
842 Safefree(SvPVX(PL_thrsv));
843 Safefree(SvANY(PL_thrsv));
844 Safefree(PL_thrsv);
845 PL_thrsv = Nullsv;
4d1ff10f 846#endif /* USE_5005THREADS */
d33b2eba 847
e5dd39fc
AB
848#ifdef USE_REENTRANT_API
849 Safefree(PL_reentrant_buffer->tmbuff);
850 Safefree(PL_reentrant_buffer);
851#endif
852
612f20c3
GS
853 sv_free_arenas();
854
fc36a67e
PP
855 /* As the absolutely last thing, free the non-arena SV for mess() */
856
3280af22 857 if (PL_mess_sv) {
9c63abab
GS
858 /* it could have accumulated taint magic */
859 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
860 MAGIC* mg;
861 MAGIC* moremagic;
862 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
863 moremagic = mg->mg_moremagic;
14befaf4
DM
864 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
865 && mg->mg_len >= 0)
9c63abab
GS
866 Safefree(mg->mg_ptr);
867 Safefree(mg);
868 }
869 }
fc36a67e 870 /* we know that type >= SVt_PV */
155aba94 871 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS
872 Safefree(SvPVX(PL_mess_sv));
873 Safefree(SvANY(PL_mess_sv));
874 Safefree(PL_mess_sv);
875 PL_mess_sv = Nullsv;
fc36a67e 876 }
31d77e54 877 return STATUS_NATIVE_EXPORT;
79072805
LW
878}
879
954c1994
GS
880/*
881=for apidoc perl_free
882
883Releases a Perl interpreter. See L<perlembed>.
884
885=cut
886*/
887
79072805 888void
0cb96387 889perl_free(pTHXx)
79072805 890{
acfe0abc 891#if defined(WIN32) || defined(NETWARE)
ce3e5b80 892# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
893# ifdef NETWARE
894 void *host = nw_internal_host;
895# else
896 void *host = w32_internal_host;
897# endif
ce3e5b80 898 PerlMem_free(aTHXx);
acfe0abc
GS
899# ifdef NETWARE
900 nw5_delete_internal_host(host);
901# else
902 win32_delete_internal_host(host);
903# endif
1c0ca838
GS
904# else
905 PerlMem_free(aTHXx);
906# endif
acfe0abc
GS
907#else
908 PerlMem_free(aTHXx);
76e3520e 909#endif
79072805
LW
910}
911
4b556e6c 912void
864dbfa3 913Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 914{
3280af22
NIS
915 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
916 PL_exitlist[PL_exitlistlen].fn = fn;
917 PL_exitlist[PL_exitlistlen].ptr = ptr;
918 ++PL_exitlistlen;
4b556e6c
JD
919}
920
954c1994
GS
921/*
922=for apidoc perl_parse
923
924Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
925
926=cut
927*/
928
79072805 929int
0cb96387 930perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 931{
6224f72b 932 I32 oldscope;
6224f72b 933 int ret;
db36c5a1 934 dJMPENV;
4d1ff10f 935#ifdef USE_5005THREADS
cea2e8a9
GS
936 dTHX;
937#endif
8d063cd8 938
a687059c
LW
939#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
940#ifdef IAMSUID
941#undef IAMSUID
cea2e8a9 942 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW
943setuid perl scripts securely.\n");
944#endif
945#endif
946
3280af22 947 PL_origargc = argc;
bc0a45ed
DM
948 {
949 /* we copy rather than point to argv
950 * since perl_clone will copy and perl_destruct
3a1ee7e8 951 * has no way of knowing if we've made a copy or
bc0a45ed
DM
952 * just point to argv
953 */
954 int i = PL_origargc;
955 New(0, PL_origargv, i+1, char*);
956 PL_origargv[i] = '\0';
957 while (i-- > 0) {
958 PL_origargv[i] = savepv(argv[i]);
959 }
960 }
961
0631ea03 962
a0d0e21e 963
3280af22 964 if (PL_do_undump) {
a0d0e21e
LW
965
966 /* Come here if running an undumped a.out. */
967
3280af22
NIS
968 PL_origfilename = savepv(argv[0]);
969 PL_do_undump = FALSE;
a0d0e21e 970 cxstack_ix = -1; /* start label stack again */
748a9306 971 init_ids();
a0d0e21e
LW
972 init_postdump_symbols(argc,argv,env);
973 return 0;
974 }
975
3280af22
NIS
976 if (PL_main_root) {
977 PL_curpad = AvARRAY(PL_comppad);
978 op_free(PL_main_root);
979 PL_main_root = Nullop;
ff0cee69 980 }
3280af22
NIS
981 PL_main_start = Nullop;
982 SvREFCNT_dec(PL_main_cv);
983 PL_main_cv = Nullcv;
79072805 984
3280af22
NIS
985 time(&PL_basetime);
986 oldscope = PL_scopestack_ix;
599cee73 987 PL_dowarn = G_WARN_OFF;
f86702cc 988
14dd3ad8
GS
989#ifdef PERL_FLEXIBLE_EXCEPTIONS
990 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
991#else
992 JMPENV_PUSH(ret);
993#endif
6224f72b 994 switch (ret) {
312caa8e 995 case 0:
14dd3ad8
GS
996#ifndef PERL_FLEXIBLE_EXCEPTIONS
997 parse_body(env,xsinit);
998#endif
7d30b5c4
GS
999 if (PL_checkav)
1000 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1001 ret = 0;
1002 break;
6224f72b
GS
1003 case 1:
1004 STATUS_ALL_FAILURE;
1005 /* FALL THROUGH */
1006 case 2:
1007 /* my_exit() was called */
3280af22 1008 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1009 LEAVE;
1010 FREETMPS;
3280af22 1011 PL_curstash = PL_defstash;
7d30b5c4
GS
1012 if (PL_checkav)
1013 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1014 ret = STATUS_NATIVE_EXPORT;
1015 break;
6224f72b 1016 case 3:
bf49b057 1017 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1018 ret = 1;
1019 break;
6224f72b 1020 }
14dd3ad8
GS
1021 JMPENV_POP;
1022 return ret;
1023}
1024
1025#ifdef PERL_FLEXIBLE_EXCEPTIONS
1026STATIC void *
1027S_vparse_body(pTHX_ va_list args)
1028{
1029 char **env = va_arg(args, char**);
1030 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1031
1032 return parse_body(env, xsinit);
312caa8e 1033}
14dd3ad8 1034#endif
312caa8e
CS
1035
1036STATIC void *
14dd3ad8 1037S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1038{
312caa8e
CS
1039 int argc = PL_origargc;
1040 char **argv = PL_origargv;
312caa8e
CS
1041 char *scriptname = NULL;
1042 int fdscript = -1;
1043 VOL bool dosearch = FALSE;
1044 char *validarg = "";
1045 AV* comppadlist;
1046 register SV *sv;
1047 register char *s;
cf756827 1048 char *cddir = Nullch;
312caa8e 1049
3280af22 1050 sv_setpvn(PL_linestr,"",0);
79cb57f6 1051 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1052 SAVEFREESV(sv);
1053 init_main_stash();
54310121 1054
6224f72b
GS
1055 for (argc--,argv++; argc > 0; argc--,argv++) {
1056 if (argv[0][0] != '-' || !argv[0][1])
1057 break;
1058#ifdef DOSUID
1059 if (*validarg)
1060 validarg = " PHOOEY ";
1061 else
1062 validarg = argv[0];
13281fa4 1063#endif
6224f72b
GS
1064 s = argv[0]+1;
1065 reswitch:
1066 switch (*s) {
729a02f2
GS
1067 case 'C':
1068#ifdef WIN32
c0932edc 1069 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS
1070 /* FALL THROUGH */
1071#endif
1d5472a9
GS
1072#ifndef PERL_STRICT_CR
1073 case '\r':
1074#endif
6224f72b
GS
1075 case ' ':
1076 case '0':
1077 case 'F':
1078 case 'a':
1079 case 'c':
1080 case 'd':
1081 case 'D':
1082 case 'h':
1083 case 'i':
1084 case 'l':
1085 case 'M':
1086 case 'm':
1087 case 'n':
1088 case 'p':
1089 case 's':
1090 case 'u':
1091 case 'U':
1092 case 'v':
599cee73
PM
1093 case 'W':
1094 case 'X':
6224f72b 1095 case 'w':
155aba94 1096 if ((s = moreswitches(s)))
6224f72b
GS
1097 goto reswitch;
1098 break;
33b78306 1099
6224f72b 1100 case 'T':
3280af22 1101 PL_tainting = TRUE;
6224f72b
GS
1102 s++;
1103 goto reswitch;
f86702cc 1104
6224f72b 1105 case 'e':
bf4acbe4
GS
1106#ifdef MACOS_TRADITIONAL
1107 /* ignore -e for Dev:Pseudo argument */
1108 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1109 break;
bf4acbe4 1110#endif
3280af22 1111 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1112 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1113 if (!PL_e_script) {
79cb57f6 1114 PL_e_script = newSVpvn("",0);
0cb96387 1115 filter_add(read_e_script, NULL);
6224f72b
GS
1116 }
1117 if (*++s)
3280af22 1118 sv_catpv(PL_e_script, s);
6224f72b 1119 else if (argv[1]) {
3280af22 1120 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1121 argc--,argv++;
1122 }
1123 else
cea2e8a9 1124 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1125 sv_catpv(PL_e_script, "\n");
6224f72b 1126 break;
afe37c7d 1127
6224f72b
GS
1128 case 'I': /* -I handled both here and in moreswitches() */
1129 forbid_setid("-I");
1130 if (!*++s && (s=argv[1]) != Nullch) {
1131 argc--,argv++;
1132 }
6224f72b 1133 if (s && *s) {
0df16ed7
GS
1134 char *p;
1135 STRLEN len = strlen(s);
1136 p = savepvn(s, len);
9c8a64f0 1137 incpush(p, TRUE, TRUE);
0df16ed7
GS
1138 sv_catpvn(sv, "-I", 2);
1139 sv_catpvn(sv, p, len);
1140 sv_catpvn(sv, " ", 1);
6224f72b 1141 Safefree(p);
0df16ed7
GS
1142 }
1143 else
a67e862a 1144 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1145 break;
1146 case 'P':
1147 forbid_setid("-P");
3280af22 1148 PL_preprocess = TRUE;
6224f72b
GS
1149 s++;
1150 goto reswitch;
1151 case 'S':
1152 forbid_setid("-S");
1153 dosearch = TRUE;
1154 s++;
1155 goto reswitch;
1156 case 'V':
3280af22
NIS
1157 if (!PL_preambleav)
1158 PL_preambleav = newAV();
1159 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1160 if (*++s != ':') {
3280af22 1161 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1162#ifdef VMS
6b88bc9c 1163 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1164#else
3280af22 1165 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1166#endif
3280af22 1167 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1168# ifdef DEBUGGING
3280af22 1169 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1170# endif
6224f72b 1171# ifdef MULTIPLICITY
8f872242 1172 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1173# endif
4d1ff10f
AB
1174# ifdef USE_5005THREADS
1175 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1176# endif
ac5e8965
JH
1177# ifdef USE_ITHREADS
1178 sv_catpv(PL_Sv," USE_ITHREADS");
1179# endif
10cc9d2a
JH
1180# ifdef USE_64_BIT_INT
1181 sv_catpv(PL_Sv," USE_64_BIT_INT");
1182# endif
1183# ifdef USE_64_BIT_ALL
1184 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1185# endif
1186# ifdef USE_LONG_DOUBLE
1187 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1188# endif
53430762
JH
1189# ifdef USE_LARGE_FILES
1190 sv_catpv(PL_Sv," USE_LARGE_FILES");
1191# endif
ac5e8965
JH
1192# ifdef USE_SOCKS
1193 sv_catpv(PL_Sv," USE_SOCKS");
1194# endif
b363f7ed
GS
1195# ifdef PERL_IMPLICIT_CONTEXT
1196 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1197# endif
1198# ifdef PERL_IMPLICIT_SYS
1199 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1200# endif
3280af22 1201 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1202
6224f72b
GS
1203#if defined(LOCAL_PATCH_COUNT)
1204 if (LOCAL_PATCH_COUNT > 0) {
1205 int i;
3280af22 1206 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1207 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1208 if (PL_localpatches[i])
cea2e8a9 1209 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS
1210 }
1211 }
1212#endif
cea2e8a9 1213 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1214#ifdef __DATE__
1215# ifdef __TIME__
cea2e8a9 1216 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1217# else
cea2e8a9 1218 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1219# endif
1220#endif
3280af22 1221 sv_catpv(PL_Sv, "; \
6224f72b 1222$\"=\"\\n \"; \
69fcd688
JH
1223@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1224#ifdef __CYGWIN__
1225 sv_catpv(PL_Sv,"\
1226push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1227#endif
1228 sv_catpv(PL_Sv, "\
6224f72b
GS
1229print \" \\%ENV:\\n @env\\n\" if @env; \
1230print \" \\@INC:\\n @INC\\n\";");
1231 }
1232 else {
3280af22
NIS
1233 PL_Sv = newSVpv("config_vars(qw(",0);
1234 sv_catpv(PL_Sv, ++s);
1235 sv_catpv(PL_Sv, "))");
6224f72b
GS
1236 s += strlen(s);
1237 }
3280af22 1238 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1239 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1240 goto reswitch;
1241 case 'x':
3280af22 1242 PL_doextract = TRUE;
6224f72b
GS
1243 s++;
1244 if (*s)
f4c556ac 1245 cddir = s;
6224f72b
GS
1246 break;
1247 case 0:
1248 break;
1249 case '-':
1250 if (!*++s || isSPACE(*s)) {
1251 argc--,argv++;
1252 goto switch_end;
1253 }
1254 /* catch use of gnu style long options */
1255 if (strEQ(s, "version")) {
1256 s = "v";
1257 goto reswitch;
1258 }
1259 if (strEQ(s, "help")) {
1260 s = "h";
1261 goto reswitch;
1262 }
1263 s--;
1264 /* FALL THROUGH */
1265 default:
cea2e8a9 1266 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1267 }
1268 }
6224f72b 1269 switch_end:
54310121 1270
f675dbe5
CB
1271 if (
1272#ifndef SECURE_INTERNAL_GETENV
1273 !PL_tainting &&
1274#endif
cf756827 1275 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1276 {
cf756827 1277 char *popt = s;
74288ac8
GS
1278 while (isSPACE(*s))
1279 s++;
1280 if (*s == '-' && *(s+1) == 'T')
1281 PL_tainting = TRUE;
1282 else {
cf756827 1283 char *popt_copy = Nullch;
74288ac8 1284 while (s && *s) {
4ea8f8fb 1285 char *d;
74288ac8
GS
1286 while (isSPACE(*s))
1287 s++;
1288 if (*s == '-') {
1289 s++;
1290 if (isSPACE(*s))
1291 continue;
1292 }
4ea8f8fb 1293 d = s;
74288ac8
GS
1294 if (!*s)
1295 break;
1296 if (!strchr("DIMUdmw", *s))
cea2e8a9 1297 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1298 while (++s && *s) {
1299 if (isSPACE(*s)) {
cf756827
GS
1300 if (!popt_copy) {
1301 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1302 s = popt_copy + (s - popt);
1303 d = popt_copy + (d - popt);
1304 }
4ea8f8fb
MS
1305 *s++ = '\0';
1306 break;
1307 }
1308 }
1309 moreswitches(d);
6224f72b 1310 }
6224f72b
GS
1311 }
1312 }
a0d0e21e 1313
6224f72b
GS
1314 if (!scriptname)
1315 scriptname = argv[0];
3280af22 1316 if (PL_e_script) {
6224f72b
GS
1317 argc++,argv--;
1318 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1319 }
1320 else if (scriptname == Nullch) {
1321#ifdef MSDOS
1322 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1323 moreswitches("h");
1324#endif
1325 scriptname = "-";
1326 }
1327
1328 init_perllib();
1329
1330 open_script(scriptname,dosearch,sv,&fdscript);
1331
1332 validate_suid(validarg, scriptname,fdscript);
1333
64ca3a65 1334#ifndef PERL_MICRO
0b5b802d
GS
1335#if defined(SIGCHLD) || defined(SIGCLD)
1336 {
1337#ifndef SIGCHLD
1338# define SIGCHLD SIGCLD
1339#endif
1340 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1341 if (sigstate == SIG_IGN) {
1342 if (ckWARN(WARN_SIGNAL))
1343 Perl_warner(aTHX_ WARN_SIGNAL,
1344 "Can't ignore signal CHLD, forcing to default");
1345 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1346 }
1347 }
1348#endif
64ca3a65 1349#endif
0b5b802d 1350
bf4acbe4
GS
1351#ifdef MACOS_TRADITIONAL
1352 if (PL_doextract || gMacPerl_AlwaysExtract) {
1353#else
f4c556ac 1354 if (PL_doextract) {
bf4acbe4 1355#endif
6224f72b 1356 find_beginning();
f4c556ac
GS
1357 if (cddir && PerlDir_chdir(cddir) < 0)
1358 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1359
1360 }
6224f72b 1361
3280af22
NIS
1362 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1363 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1364 CvUNIQUE_on(PL_compcv);
1365
1366 PL_comppad = newAV();
1367 av_push(PL_comppad, Nullsv);
1368 PL_curpad = AvARRAY(PL_comppad);
1369 PL_comppad_name = newAV();
1370 PL_comppad_name_fill = 0;
1371 PL_min_intro_pending = 0;
1372 PL_padix = 0;
4d1ff10f 1373#ifdef USE_5005THREADS
79cb57f6 1374 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS
1375 PL_curpad[0] = (SV*)newAV();
1376 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1377 CvOWNER(PL_compcv) = 0;
1378 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1379 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1380#endif /* USE_5005THREADS */
6224f72b
GS
1381
1382 comppadlist = newAV();
1383 AvREAL_off(comppadlist);
3280af22
NIS
1384 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1385 av_store(comppadlist, 1, (SV*)PL_comppad);
1386 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1387
0c4f7ff0 1388 boot_core_PerlIO();
6224f72b 1389 boot_core_UNIVERSAL();
9a34ef1d 1390#ifndef PERL_MICRO
09bef843 1391 boot_core_xsutils();
9a34ef1d 1392#endif
6224f72b
GS
1393
1394 if (xsinit)
acfe0abc 1395 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1396#ifndef PERL_MICRO
ed79a026 1397#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1398 init_os_extras();
6224f72b 1399#endif
64ca3a65 1400#endif
6224f72b 1401
29209bc5 1402#ifdef USE_SOCKS
1b9c9cf5
DH
1403# ifdef HAS_SOCKS5_INIT
1404 socks5_init(argv[0]);
1405# else
29209bc5 1406 SOCKSinit(argv[0]);
1b9c9cf5 1407# endif
ac27b0f5 1408#endif
29209bc5 1409
6224f72b
GS
1410 init_predump_symbols();
1411 /* init_postdump_symbols not currently designed to be called */
1412 /* more than once (ENV isn't cleared first, for example) */
1413 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1414 if (!PL_do_undump)
6224f72b
GS
1415 init_postdump_symbols(argc,argv,env);
1416
1417 init_lexer();
1418
1419 /* now parse the script */
1420
91487cfc 1421 SETERRNO(0,SS$_NORMAL);
3280af22 1422 PL_error_count = 0;
bf4acbe4
GS
1423#ifdef MACOS_TRADITIONAL
1424 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1425 if (PL_minus_c)
1426 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1427 else {
1428 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1429 MacPerl_MPWFileName(PL_origfilename));
1430 }
1431 }
1432#else
3280af22
NIS
1433 if (yyparse() || PL_error_count) {
1434 if (PL_minus_c)
cea2e8a9 1435 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1436 else {
cea2e8a9 1437 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1438 PL_origfilename);
6224f72b
GS
1439 }
1440 }
bf4acbe4 1441#endif
57843af0 1442 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1443 PL_curstash = PL_defstash;
1444 PL_preprocess = FALSE;
1445 if (PL_e_script) {
1446 SvREFCNT_dec(PL_e_script);
1447 PL_e_script = Nullsv;
6224f72b
GS
1448 }
1449
8bfdd7d9
HS
1450/*
1451 Not sure that this is still the right place to do this now that we
1452 no longer use PL_nrs. HVDS 2001/09/09
1453*/
864dbfa3 1454 sv_setsv(get_sv("/", TRUE), PL_rs);
8bfdd7d9 1455
3280af22 1456 if (PL_do_undump)
6224f72b
GS
1457 my_unexec();
1458
57843af0
GS
1459 if (isWARN_ONCE) {
1460 SAVECOPFILE(PL_curcop);
1461 SAVECOPLINE(PL_curcop);
3280af22 1462 gv_check(PL_defstash);
57843af0 1463 }
6224f72b
GS
1464
1465 LEAVE;
1466 FREETMPS;
1467
1468#ifdef MYMALLOC
1469 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1470 dump_mstats("after compilation:");
1471#endif
1472
1473 ENTER;
3280af22 1474 PL_restartop = 0;
312caa8e 1475 return NULL;
6224f72b
GS
1476}
1477
954c1994
GS
1478/*
1479=for apidoc perl_run
1480
1481Tells a Perl interpreter to run. See L<perlembed>.
1482
1483=cut
1484*/
1485
6224f72b 1486int
0cb96387 1487perl_run(pTHXx)
6224f72b 1488{
6224f72b 1489 I32 oldscope;
14dd3ad8 1490 int ret = 0;
db36c5a1 1491 dJMPENV;
4d1ff10f 1492#ifdef USE_5005THREADS
cea2e8a9
GS
1493 dTHX;
1494#endif
6224f72b 1495
3280af22 1496 oldscope = PL_scopestack_ix;
96e176bf
CL
1497#ifdef VMS
1498 VMSISH_HUSHED = 0;
1499#endif
6224f72b 1500
14dd3ad8 1501#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1502 redo_body:
14dd3ad8
GS
1503 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1504#else
1505 JMPENV_PUSH(ret);
1506#endif
6224f72b
GS
1507 switch (ret) {
1508 case 1:
1509 cxstack_ix = -1; /* start context stack again */
312caa8e 1510 goto redo_body;
14dd3ad8
GS
1511 case 0: /* normal completion */
1512#ifndef PERL_FLEXIBLE_EXCEPTIONS
1513 redo_body:
1514 run_body(oldscope);
1515#endif
1516 /* FALL THROUGH */
1517 case 2: /* my_exit() */
3280af22 1518 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1519 LEAVE;
1520 FREETMPS;
3280af22 1521 PL_curstash = PL_defstash;
3a1ee7e8 1522 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
1523 PL_endav && !PL_minus_c)
1524 call_list(oldscope, PL_endav);
6224f72b
GS
1525#ifdef MYMALLOC
1526 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1527 dump_mstats("after execution: ");
1528#endif
14dd3ad8
GS
1529 ret = STATUS_NATIVE_EXPORT;
1530 break;
6224f72b 1531 case 3:
312caa8e
CS
1532 if (PL_restartop) {
1533 POPSTACK_TO(PL_mainstack);
1534 goto redo_body;
6224f72b 1535 }
bf49b057 1536 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1537 FREETMPS;
14dd3ad8
GS
1538 ret = 1;
1539 break;
6224f72b
GS
1540 }
1541
14dd3ad8
GS
1542 JMPENV_POP;
1543 return ret;
312caa8e
CS
1544}
1545
14dd3ad8 1546#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1547STATIC void *
14dd3ad8 1548S_vrun_body(pTHX_ va_list args)
312caa8e 1549{
312caa8e
CS
1550 I32 oldscope = va_arg(args, I32);
1551
14dd3ad8
GS
1552 return run_body(oldscope);
1553}
1554#endif
1555
1556
1557STATIC void *
1558S_run_body(pTHX_ I32 oldscope)
1559{
6224f72b 1560 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1561 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1562
3280af22 1563 if (!PL_restartop) {
6224f72b
GS
1564 DEBUG_x(dump_all());
1565 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1566 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1567 PTR2UV(thr)));
6224f72b 1568
3280af22 1569 if (PL_minus_c) {
bf4acbe4 1570#ifdef MACOS_TRADITIONAL
be708cc0 1571 PerlIO_printf(Perl_error_log, "# %s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1572#else
bf49b057 1573 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1574#endif
6224f72b
GS
1575 my_exit(0);
1576 }
3280af22 1577 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1578 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1579 if (PL_initav)
1580 call_list(oldscope, PL_initav);
6224f72b
GS
1581 }
1582
1583 /* do it */
1584
3280af22 1585 if (PL_restartop) {
533c011a 1586 PL_op = PL_restartop;
3280af22 1587 PL_restartop = 0;
cea2e8a9 1588 CALLRUNOPS(aTHX);
6224f72b 1589 }
3280af22
NIS
1590 else if (PL_main_start) {
1591 CvDEPTH(PL_main_cv) = 1;
533c011a 1592 PL_op = PL_main_start;
cea2e8a9 1593 CALLRUNOPS(aTHX);
6224f72b
GS
1594 }
1595
f6b3007c
JH
1596 my_exit(0);
1597 /* NOTREACHED */
312caa8e 1598 return NULL;
6224f72b
GS
1599}
1600
954c1994
GS
1601/*
1602=for apidoc p||get_sv
1603
1604Returns the SV of the specified Perl scalar. If C<create> is set and the
1605Perl variable does not exist then it will be created. If C<create> is not
1606set and the variable does not exist then NULL is returned.
1607
1608=cut
1609*/
1610
6224f72b 1611SV*
864dbfa3 1612Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1613{
1614 GV *gv;
4d1ff10f 1615#ifdef USE_5005THREADS
6224f72b
GS
1616 if (name[1] == '\0' && !isALPHA(name[0])) {
1617 PADOFFSET tmp = find_threadsv(name);
411caa50 1618 if (tmp != NOT_IN_PAD)
6224f72b 1619 return THREADSV(tmp);
6224f72b 1620 }
4d1ff10f 1621#endif /* USE_5005THREADS */
6224f72b
GS
1622 gv = gv_fetchpv(name, create, SVt_PV);
1623 if (gv)
1624 return GvSV(gv);
1625 return Nullsv;
1626}
1627
954c1994
GS
1628/*
1629=for apidoc p||get_av
1630
1631Returns the AV of the specified Perl array. If C<create> is set and the
1632Perl variable does not exist then it will be created. If C<create> is not
1633set and the variable does not exist then NULL is returned.
1634
1635=cut
1636*/
1637
6224f72b 1638AV*
864dbfa3 1639Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1640{
1641 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1642 if (create)
1643 return GvAVn(gv);
1644 if (gv)
1645 return GvAV(gv);
1646 return Nullav;
1647}
1648
954c1994
GS
1649/*
1650=for apidoc p||get_hv
1651
1652Returns the HV of the specified Perl hash. If C<create> is set and the
1653Perl variable does not exist then it will be created. If C<create> is not
1654set and the variable does not exist then NULL is returned.
1655
1656=cut
1657*/
1658
6224f72b 1659HV*
864dbfa3 1660Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1661{
a0d0e21e
LW
1662 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1663 if (create)
1664 return GvHVn(gv);
1665 if (gv)
1666 return GvHV(gv);
1667 return Nullhv;
1668}
1669
954c1994
GS
1670/*
1671=for apidoc p||get_cv
1672
1673Returns the CV of the specified Perl subroutine. If C<create> is set and
1674the Perl subroutine does not exist then it will be declared (which has the
1675same effect as saying C<sub name;>). If C<create> is not set and the
1676subroutine does not exist then NULL is returned.
1677
1678=cut
1679*/
1680
a0d0e21e 1681CV*
864dbfa3 1682Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
1683{
1684 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1685 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
1686 /* XXX this is probably not what they think they're getting.
1687 * It has the same effect as "sub name;", i.e. just a forward
1688 * declaration! */
8ebc5c01 1689 if (create && !GvCVu(gv))
774d564b 1690 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1691 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1692 Nullop,
a0d0e21e
LW
1693 Nullop);
1694 if (gv)
8ebc5c01 1695 return GvCVu(gv);
a0d0e21e
LW
1696 return Nullcv;
1697}
1698
79072805
LW
1699/* Be sure to refetch the stack pointer after calling these routines. */
1700
954c1994
GS
1701/*
1702=for apidoc p||call_argv
1703
1704Performs a callback to the specified Perl sub. See L<perlcall>.
1705
1706=cut
1707*/
1708
a0d0e21e 1709I32
864dbfa3 1710Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1711
8ac85365
NIS
1712 /* See G_* flags in cop.h */
1713 /* null terminated arg list */
8990e307 1714{
a0d0e21e 1715 dSP;
8990e307 1716
924508f0 1717 PUSHMARK(SP);
a0d0e21e 1718 if (argv) {
8990e307 1719 while (*argv) {
a0d0e21e 1720 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
1721 argv++;
1722 }
a0d0e21e 1723 PUTBACK;
8990e307 1724 }
864dbfa3 1725 return call_pv(sub_name, flags);
8990e307
LW
1726}
1727
954c1994
GS
1728/*
1729=for apidoc p||call_pv
1730
1731Performs a callback to the specified Perl sub. See L<perlcall>.
1732
1733=cut
1734*/
1735
a0d0e21e 1736I32
864dbfa3 1737Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
1738 /* name of the subroutine */
1739 /* See G_* flags in cop.h */
a0d0e21e 1740{
864dbfa3 1741 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
1742}
1743
954c1994
GS
1744/*
1745=for apidoc p||call_method
1746
1747Performs a callback to the specified Perl method. The blessed object must
1748be on the stack. See L<perlcall>.
1749
1750=cut
1751*/
1752
a0d0e21e 1753I32
864dbfa3 1754Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
1755 /* name of the subroutine */
1756 /* See G_* flags in cop.h */
a0d0e21e 1757{
968b3946 1758 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
1759}
1760
1761/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
1762/*
1763=for apidoc p||call_sv
1764
1765Performs a callback to the Perl sub whose name is in the SV. See
1766L<perlcall>.
1767
1768=cut
1769*/
1770
a0d0e21e 1771I32
864dbfa3 1772Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1773 /* See G_* flags in cop.h */
a0d0e21e 1774{
924508f0 1775 dSP;
a0d0e21e 1776 LOGOP myop; /* fake syntax tree node */
968b3946 1777 UNOP method_op;
aa689395 1778 I32 oldmark;
13689cfe 1779 volatile I32 retval = 0;
a0d0e21e 1780 I32 oldscope;
54310121 1781 bool oldcatch = CATCH_GET;
6224f72b 1782 int ret;
533c011a 1783 OP* oldop = PL_op;
db36c5a1 1784 dJMPENV;
1e422769 1785
a0d0e21e
LW
1786 if (flags & G_DISCARD) {
1787 ENTER;
1788 SAVETMPS;
1789 }
1790
aa689395 1791 Zero(&myop, 1, LOGOP);
54310121 1792 myop.op_next = Nullop;
f51d4af5 1793 if (!(flags & G_NOARGS))
aa689395 1794 myop.op_flags |= OPf_STACKED;
54310121
PP
1795 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1796 (flags & G_ARRAY) ? OPf_WANT_LIST :
1797 OPf_WANT_SCALAR);
462e5cf6 1798 SAVEOP();
533c011a 1799 PL_op = (OP*)&myop;
aa689395 1800
3280af22
NIS
1801 EXTEND(PL_stack_sp, 1);
1802 *++PL_stack_sp = sv;
aa689395 1803 oldmark = TOPMARK;
3280af22 1804 oldscope = PL_scopestack_ix;
a0d0e21e 1805
3280af22 1806 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1807 /* Handle first BEGIN of -d. */
3280af22 1808 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
1809 /* Try harder, since this may have been a sighandler, thus
1810 * curstash may be meaningless. */
3280af22 1811 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1812 && !(flags & G_NODEBUG))
533c011a 1813 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1814
968b3946
GS
1815 if (flags & G_METHOD) {
1816 Zero(&method_op, 1, UNOP);
1817 method_op.op_next = PL_op;
1818 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1819 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1820 PL_op = (OP*)&method_op;
968b3946
GS
1821 }
1822
312caa8e 1823 if (!(flags & G_EVAL)) {
0cdb2077 1824 CATCH_SET(TRUE);
14dd3ad8 1825 call_body((OP*)&myop, FALSE);
312caa8e 1826 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1827 CATCH_SET(oldcatch);
312caa8e
CS
1828 }
1829 else {
d78bda3d 1830 myop.op_other = (OP*)&myop;
3280af22 1831 PL_markstack_ptr--;
4633a7c4
LW
1832 /* we're trying to emulate pp_entertry() here */
1833 {
c09156bb 1834 register PERL_CONTEXT *cx;
54310121 1835 I32 gimme = GIMME_V;
ac27b0f5 1836
4633a7c4
LW
1837 ENTER;
1838 SAVETMPS;
ac27b0f5 1839
968b3946 1840 push_return(Nullop);
1d76a5c3 1841 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1842 PUSHEVAL(cx, 0, 0);
533c011a 1843 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1844
faef0170 1845 PL_in_eval = EVAL_INEVAL;
4633a7c4 1846 if (flags & G_KEEPERR)
faef0170 1847 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1848 else
38a03e6e 1849 sv_setpv(ERRSV,"");
4633a7c4 1850 }
3280af22 1851 PL_markstack_ptr++;
a0d0e21e 1852
14dd3ad8
GS
1853#ifdef PERL_FLEXIBLE_EXCEPTIONS
1854 redo_body:
1855 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1856 (OP*)&myop, FALSE);
14dd3ad8
GS
1857#else
1858 JMPENV_PUSH(ret);
1859#endif
6224f72b
GS
1860 switch (ret) {
1861 case 0:
14dd3ad8
GS
1862#ifndef PERL_FLEXIBLE_EXCEPTIONS
1863 redo_body:
1864 call_body((OP*)&myop, FALSE);
1865#endif
312caa8e
CS
1866 retval = PL_stack_sp - (PL_stack_base + oldmark);
1867 if (!(flags & G_KEEPERR))
1868 sv_setpv(ERRSV,"");
a0d0e21e 1869 break;
6224f72b 1870 case 1:
f86702cc 1871 STATUS_ALL_FAILURE;
a0d0e21e 1872 /* FALL THROUGH */
6224f72b 1873 case 2:
a0d0e21e 1874 /* my_exit() was called */
3280af22 1875 PL_curstash = PL_defstash;
a0d0e21e 1876 FREETMPS;
14dd3ad8 1877 JMPENV_POP;
cc3604b1 1878 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1879 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1880 my_exit_jump();
a0d0e21e 1881 /* NOTREACHED */
6224f72b 1882 case 3:
3280af22 1883 if (PL_restartop) {
533c011a 1884 PL_op = PL_restartop;
3280af22 1885 PL_restartop = 0;
312caa8e 1886 goto redo_body;
a0d0e21e 1887 }
3280af22 1888 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1889 if (flags & G_ARRAY)
1890 retval = 0;
1891 else {
1892 retval = 1;
3280af22 1893 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1894 }
312caa8e 1895 break;
a0d0e21e 1896 }
a0d0e21e 1897
3280af22 1898 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
1899 SV **newsp;
1900 PMOP *newpm;
1901 I32 gimme;
c09156bb 1902 register PERL_CONTEXT *cx;
a0a2876f
LW
1903 I32 optype;
1904
1905 POPBLOCK(cx,newpm);
1906 POPEVAL(cx);
1907 pop_return();
3280af22 1908 PL_curpm = newpm;
a0a2876f 1909 LEAVE;
a0d0e21e 1910 }
14dd3ad8 1911 JMPENV_POP;
a0d0e21e 1912 }
1e422769 1913
a0d0e21e 1914 if (flags & G_DISCARD) {
3280af22 1915 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1916 retval = 0;
1917 FREETMPS;
1918 LEAVE;
1919 }
533c011a 1920 PL_op = oldop;
a0d0e21e
LW
1921 return retval;
1922}
1923
14dd3ad8 1924#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1925STATIC void *
14dd3ad8 1926S_vcall_body(pTHX_ va_list args)
312caa8e
CS
1927{
1928 OP *myop = va_arg(args, OP*);
1929 int is_eval = va_arg(args, int);
1930
14dd3ad8 1931 call_body(myop, is_eval);
312caa8e
CS
1932 return NULL;
1933}
14dd3ad8 1934#endif
312caa8e
CS
1935
1936STATIC void
14dd3ad8 1937S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1938{
312caa8e
CS
1939 if (PL_op == myop) {
1940 if (is_eval)
f807eda9 1941 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1942 else
f807eda9 1943 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
1944 }
1945 if (PL_op)
cea2e8a9 1946 CALLRUNOPS(aTHX);
312caa8e
CS
1947}
1948
6e72f9df 1949/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1950
954c1994
GS
1951/*
1952=for apidoc p||eval_sv
1953
1954Tells Perl to C<eval> the string in the SV.
1955
1956=cut
1957*/
1958
a0d0e21e 1959I32
864dbfa3 1960Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1961
8ac85365 1962 /* See G_* flags in cop.h */
a0d0e21e 1963{
924508f0 1964 dSP;
a0d0e21e 1965 UNOP myop; /* fake syntax tree node */
8fa7f367 1966 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1967 volatile I32 retval = 0;
4633a7c4 1968 I32 oldscope;
6224f72b 1969 int ret;
533c011a 1970 OP* oldop = PL_op;
db36c5a1 1971 dJMPENV;
84902520 1972
4633a7c4
LW
1973 if (flags & G_DISCARD) {
1974 ENTER;
1975 SAVETMPS;
1976 }
1977
462e5cf6 1978 SAVEOP();
533c011a
NIS
1979 PL_op = (OP*)&myop;
1980 Zero(PL_op, 1, UNOP);
3280af22
NIS
1981 EXTEND(PL_stack_sp, 1);
1982 *++PL_stack_sp = sv;
1983 oldscope = PL_scopestack_ix;
79072805 1984
4633a7c4
LW
1985 if (!(flags & G_NOARGS))
1986 myop.op_flags = OPf_STACKED;
79072805 1987 myop.op_next = Nullop;
6e72f9df 1988 myop.op_type = OP_ENTEREVAL;
54310121
PP
1989 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1990 (flags & G_ARRAY) ? OPf_WANT_LIST :
1991 OPf_WANT_SCALAR);
6e72f9df
PP
1992 if (flags & G_KEEPERR)
1993 myop.op_flags |= OPf_SPECIAL;
4633a7c4 1994
14dd3ad8 1995#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1996 redo_body:
14dd3ad8 1997 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1998 (OP*)&myop, TRUE);
14dd3ad8
GS
1999#else
2000 JMPENV_PUSH(ret);
2001#endif
6224f72b
GS
2002 switch (ret) {
2003 case 0:
14dd3ad8
GS
2004#ifndef PERL_FLEXIBLE_EXCEPTIONS
2005 redo_body:
2006 call_body((OP*)&myop,TRUE);
2007#endif
312caa8e
CS
2008 retval = PL_stack_sp - (PL_stack_base + oldmark);
2009 if (!(flags & G_KEEPERR))
2010 sv_setpv(ERRSV,"");
4633a7c4 2011 break;
6224f72b 2012 case 1:
f86702cc 2013 STATUS_ALL_FAILURE;
4633a7c4 2014 /* FALL THROUGH */
6224f72b 2015 case 2:
4633a7c4 2016 /* my_exit() was called */
3280af22 2017 PL_curstash = PL_defstash;
4633a7c4 2018 FREETMPS;
14dd3ad8 2019 JMPENV_POP;
cc3604b1 2020 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2021 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2022 my_exit_jump();
4633a7c4 2023 /* NOTREACHED */
6224f72b 2024 case 3:
3280af22 2025 if (PL_restartop) {
533c011a 2026 PL_op = PL_restartop;
3280af22 2027 PL_restartop = 0;
312caa8e 2028 goto redo_body;
4633a7c4 2029 }
3280af22 2030 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2031 if (flags & G_ARRAY)
2032 retval = 0;
2033 else {
2034 retval = 1;
3280af22 2035 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2036 }
312caa8e 2037 break;
4633a7c4
LW
2038 }
2039
14dd3ad8 2040 JMPENV_POP;
4633a7c4 2041 if (flags & G_DISCARD) {
3280af22 2042 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2043 retval = 0;
2044 FREETMPS;
2045 LEAVE;
2046 }
533c011a 2047 PL_op = oldop;
4633a7c4
LW
2048 return retval;
2049}
2050
954c1994
GS
2051/*
2052=for apidoc p||eval_pv
2053
2054Tells Perl to C<eval> the given string and return an SV* result.
2055
2056=cut
2057*/
2058
137443ea 2059SV*
864dbfa3 2060Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2061{
2062 dSP;
2063 SV* sv = newSVpv(p, 0);
2064
864dbfa3 2065 eval_sv(sv, G_SCALAR);
137443ea
PP
2066 SvREFCNT_dec(sv);
2067
2068 SPAGAIN;
2069 sv = POPs;
2070 PUTBACK;
2071
2d8e6c8d
GS
2072 if (croak_on_error && SvTRUE(ERRSV)) {
2073 STRLEN n_a;
cea2e8a9 2074 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2075 }
137443ea
PP
2076
2077 return sv;
2078}
2079
4633a7c4
LW
2080/* Require a module. */
2081
954c1994
GS
2082/*
2083=for apidoc p||require_pv
2084
7d3fb230
BS
2085Tells Perl to C<require> the file named by the string argument. It is
2086analogous to the Perl code C<eval "require '$file'">. It's even
2087implemented that way; consider using Perl_load_module instead.
954c1994 2088
7d3fb230 2089=cut */
954c1994 2090
4633a7c4 2091void
864dbfa3 2092Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2093{
d3acc0f7
JP
2094 SV* sv;
2095 dSP;
e788e7d3 2096 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2097 PUTBACK;
2098 sv = sv_newmortal();
4633a7c4
LW
2099 sv_setpv(sv, "require '");
2100 sv_catpv(sv, pv);
2101 sv_catpv(sv, "'");
864dbfa3 2102 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2103 SPAGAIN;
2104 POPSTACK;
79072805
LW
2105}
2106
79072805 2107void
864dbfa3 2108Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW
2109{
2110 register GV *gv;
2111
155aba94 2112 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2113 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2114}
2115
76e3520e 2116STATIC void
cea2e8a9 2117S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2118{
ab821d7f 2119 /* This message really ought to be max 23 lines.
75c72d73 2120 * Removed -h because the user already knows that option. Others? */
fb73857a 2121
76e3520e 2122 static char *usage_msg[] = {
fb73857a
PP
2123"-0[octal] specify record separator (\\0, if no argument)",
2124"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2125"-C enable native wide character system interfaces",
1950ee41 2126"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2127"-d[:debugger] run program under debugger",
2128"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2129"-e 'command' one line of program (several -e's allowed, omit programfile)",
2130"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2131"-i[extension] edit <> files in place (makes backup if extension supplied)",
2132"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2133"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2134"-[mM][-]module execute `use/no module...' before executing program",
2135"-n assume 'while (<>) { ... }' loop around program",
2136"-p assume loop like -n but print line also, like sed",
2137"-P run program through C preprocessor before compilation",
2138"-s enable rudimentary parsing for switches after programfile",
2139"-S look for programfile using PATH environment variable",
2140"-T enable tainting checks",
2141"-u dump core after parsing program",
fb73857a 2142"-U allow unsafe operations",
aac3bd0d
GS
2143"-v print version, subversion (includes VERY IMPORTANT perl info)",
2144"-V[:variable] print configuration summary (or a single Config.pm variable)",
2145"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS
2146"-W enable all warnings",
2147"-X disable all warnings",
fb73857a
PP
2148"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2149"\n",
2150NULL
2151};
76e3520e 2152 char **p = usage_msg;
fb73857a 2153
b0e47665
GS
2154 PerlIO_printf(PerlIO_stdout(),
2155 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2156 name);
fb73857a 2157 while (*p)
b0e47665 2158 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2159}
2160
79072805
LW
2161/* This routine handles any switches that can be given during run */
2162
2163char *
864dbfa3 2164Perl_moreswitches(pTHX_ char *s)
79072805 2165{
ba210ebe 2166 STRLEN numlen;
c07a80fd 2167 U32 rschar;
79072805
LW
2168
2169 switch (*s) {
2170 case '0':
a863c7d1 2171 {
53305cf1
NC
2172 I32 flags = 0;
2173 numlen = 4;
2174 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
8bfdd7d9 2175 SvREFCNT_dec(PL_rs);
c07a80fd 2176 if (rschar & ~((U8)~0))
8bfdd7d9 2177 PL_rs = &PL_sv_undef;
c07a80fd 2178 else if (!rschar && numlen >= 2)
8bfdd7d9 2179 PL_rs = newSVpvn("", 0);
c07a80fd
PP
2180 else {
2181 char ch = rschar;
8bfdd7d9 2182 PL_rs = newSVpvn(&ch, 1);
79072805
LW
2183 }
2184 return s + numlen;
a863c7d1 2185 }
46487f74
GS
2186 case 'C':
2187 PL_widesyscalls = TRUE;
2188 s++;
2189 return s;
2304df62 2190 case 'F':
3280af22
NIS
2191 PL_minus_F = TRUE;
2192 PL_splitstr = savepv(s + 1);
2304df62
AD
2193 s += strlen(s);
2194 return s;
79072805 2195 case 'a':
3280af22 2196 PL_minus_a = TRUE;
79072805
LW
2197 s++;
2198 return s;
2199 case 'c':
3280af22 2200 PL_minus_c = TRUE;
79072805
LW
2201 s++;
2202 return s;
2203 case 'd':
bbce6d69 2204 forbid_setid("-d");
4633a7c4 2205 s++;
70c94a19
RR
2206 /* The following permits -d:Mod to accepts arguments following an =
2207 in the fashion that -MSome::Mod does. */
2208 if (*s == ':' || *s == '=') {
2209 char *start;
2210 SV *sv;
2211 sv = newSVpv("use Devel::", 0);
2212 start = ++s;
2213 /* We now allow -d:Module=Foo,Bar */
2214 while(isALNUM(*s) || *s==':') ++s;
2215 if (*s != '=')
2216 sv_catpv(sv, start);
2217 else {
2218 sv_catpvn(sv, start, s-start);
2219 sv_catpv(sv, " split(/,/,q{");
2220 sv_catpv(sv, ++s);
2221 sv_catpv(sv, "})");
2222 }
4633a7c4 2223 s += strlen(s);
70c94a19 2224 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2225 }
ed094faf 2226 if (!PL_perldb) {
3280af22 2227 PL_perldb = PERLDB_ALL;
a0d0e21e 2228 init_debugger();
ed094faf 2229 }
79072805
LW
2230 return s;
2231 case 'D':
0453d815 2232 {
79072805 2233#ifdef DEBUGGING
bbce6d69 2234 forbid_setid("-D");
79072805 2235 if (isALPHA(s[1])) {
04932ac8
DM
2236 /* if adding extra options, remember to update DEBUG_MASK */
2237 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW
2238 char *d;
2239
93a17b20 2240 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2241 PL_debug |= 1 << (d - debopts);
79072805
LW
2242 }
2243 else {
3280af22 2244 PL_debug = atoi(s+1);
79072805
LW
2245 for (s++; isDIGIT(*s); s++) ;
2246 }
aea4f609 2247 PL_debug |= DEBUG_TOP_FLAG;
79072805 2248#else
0453d815
PM
2249 if (ckWARN_d(WARN_DEBUGGING))
2250 Perl_warner(aTHX_ WARN_DEBUGGING,
2251 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2252 for (s++; isALNUM(*s); s++) ;
79072805
LW
2253#endif
2254 /*SUPPRESS 530*/
2255 return s;
0453d815 2256 }
4633a7c4 2257 case 'h':
ac27b0f5 2258 usage(PL_origargv[0]);
6ad3d225 2259 PerlProc_exit(0);
79072805 2260 case 'i':
3280af22
NIS
2261 if (PL_inplace)
2262 Safefree(PL_inplace);
2263 PL_inplace = savepv(s+1);
79072805 2264 /*SUPPRESS 530*/
3280af22 2265 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2266 if (*s) {
fb73857a 2267 *s++ = '\0';
7b8d334a
GS
2268 if (*s == '-') /* Additional switches on #! line. */
2269 s++;
2270 }
fb73857a
PP
2271 return s;
2272 case 'I': /* -I handled both here and in parse_perl() */
bbce6d69 2273 forbid_setid("-I");
fb73857a
PP
2274 ++s;
2275 while (*s && isSPACE(*s))
2276 ++s;
2277 if (*s) {
774d564b 2278 char *e, *p;
0df16ed7
GS
2279 p = s;
2280 /* ignore trailing spaces (possibly followed by other switches) */
2281 do {
2282 for (e = p; *e && !isSPACE(*e); e++) ;
2283 p = e;
2284 while (isSPACE(*p))
2285 p++;
2286 } while (*p && *p != '-');
2287 e = savepvn(s, e-s);
9c8a64f0 2288 incpush(e, TRUE, TRUE);
0df16ed7
GS
2289 Safefree(e);
2290 s = p;
2291 if (*s == '-')
2292 s++;
79072805
LW
2293 }
2294 else
a67e862a 2295 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2296 return s;
79072805 2297 case 'l':
3280af22 2298 PL_minus_l = TRUE;
79072805 2299 s++;
7889fe52
NIS
2300 if (PL_ors_sv) {
2301 SvREFCNT_dec(PL_ors_sv);
2302 PL_ors_sv = Nullsv;
2303 }
79072805 2304 if (isDIGIT(*s)) {
53305cf1 2305 I32 flags = 0;
7889fe52 2306 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2307 numlen = 3 + (*s == '0');
2308 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2309 s += numlen;
2310 }
2311 else {
8bfdd7d9 2312 if (RsPARA(PL_rs)) {
7889fe52
NIS
2313 PL_ors_sv = newSVpvn("\n\n",2);
2314 }
2315 else {
8bfdd7d9 2316 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2317 }
79072805
LW
2318 }
2319 return s;
1a30305b 2320 case 'M':
bbce6d69 2321 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2322 /* FALL THROUGH */
2323 case 'm':
bbce6d69 2324 forbid_setid("-m"); /* XXX ? */
1a30305b 2325 if (*++s) {
a5f75d66 2326 char *start;
11343788 2327 SV *sv;
a5f75d66
AD
2328 char *use = "use ";
2329 /* -M-foo == 'no foo' */
2330 if (*s == '-') { use = "no "; ++s; }
11343788 2331 sv = newSVpv(use,0);
a5f75d66 2332 start = s;
1a30305b 2333 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2334 while(isALNUM(*s) || *s==':') ++s;
2335 if (*s != '=') {
11343788 2336 sv_catpv(sv, start);
c07a80fd
PP
2337 if (*(start-1) == 'm') {
2338 if (*s != '\0')
cea2e8a9 2339 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2340 sv_catpv( sv, " ()");
c07a80fd
PP
2341 }
2342 } else {
6df41af2 2343 if (s == start)
be98fb35
GS
2344 Perl_croak(aTHX_ "Module name required with -%c option",
2345 s[-1]);
11343788
MB
2346 sv_catpvn(sv, start, s-start);
2347 sv_catpv(sv, " split(/,/,q{");
2348 sv_catpv(sv, ++s);
2349 sv_catpv(sv, "})");
c07a80fd 2350 }
1a30305b 2351 s += strlen(s);
5c831c24 2352 if (!PL_preambleav)
3280af22
NIS
2353 PL_preambleav = newAV();
2354 av_push(PL_preambleav, sv);
1a30305b
PP
2355 }
2356 else
cea2e8a9 2357 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2358 return s;
79072805 2359 case 'n':
3280af22 2360 PL_minus_n = TRUE;
79072805
LW
2361 s++;
2362 return s;
2363 case 'p':
3280af22 2364 PL_minus_p = TRUE;
79072805
LW
2365 s++;
2366 return s;
2367 case 's':
bbce6d69 2368 forbid_setid("-s");
3280af22 2369 PL_doswitches = TRUE;
79072805
LW
2370 s++;
2371 return s;
463ee0b2 2372 case 'T':
3280af22 2373 if (!PL_tainting)
cea2e8a9 2374 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW
2375 s++;
2376 return s;
79072805 2377 case 'u':
bf4acbe4
GS
2378#ifdef MACOS_TRADITIONAL
2379 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2380#endif
3280af22 2381 PL_do_undump = TRUE;
79072805
LW
2382 s++;
2383 return s;
2384 case 'U':
3280af22 2385 PL_unsafe = TRUE;
79072805
LW
2386 s++;
2387 return s;
2388 case 'v':
8e9464f1 2389#if !defined(DGUX)
b0e47665 2390 PerlIO_printf(PerlIO_stdout(),
d2560b70 2391 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2392 PL_patchlevel, ARCHNAME));
8e9464f1
JH
2393#else /* DGUX */
2394/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2395 PerlIO_printf(PerlIO_stdout(),
2396 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2397 PerlIO_printf(PerlIO_stdout(),
2398 Perl_form(aTHX_ " built under %s at %s %s\n",
2399 OSNAME, __DATE__, __TIME__));
2400 PerlIO_printf(PerlIO_stdout(),
2401 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2402 OSVERS));
8e9464f1
JH
2403#endif /* !DGUX */
2404
fb73857a
PP
2405#if defined(LOCAL_PATCH_COUNT)
2406 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2407 PerlIO_printf(PerlIO_stdout(),
2408 "\n(with %d registered patch%s, "
2409 "see perl -V for more detail)",
2410 (int)LOCAL_PATCH_COUNT,
2411 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2412#endif
1a30305b 2413
b0e47665 2414 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2415 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH
2416#ifdef MACOS_TRADITIONAL
2417 PerlIO_printf(PerlIO_stdout(),
03765510
JH
2418 "\nMac OS port Copyright 1991-2001, Matthias Neeracher;\n"
2419 "maintained by Chris Nandor\n");
eae9c151 2420#endif
79072805 2421#ifdef MSDOS
b0e47665
GS
2422 PerlIO_printf(PerlIO_stdout(),
2423 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2424#endif
2425#ifdef DJGPP
b0e47665
GS
2426 PerlIO_printf(PerlIO_stdout(),
2427 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2428 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2429#endif
79072805 2430#ifdef OS2
b0e47665
GS
2431 PerlIO_printf(PerlIO_stdout(),
2432 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2433 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2434#endif
79072805 2435#ifdef atarist
b0e47665
GS
2436 PerlIO_printf(PerlIO_stdout(),
2437 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2438#endif
a3f9223b 2439#ifdef __BEOS__
b0e47665
GS
2440 PerlIO_printf(PerlIO_stdout(),
2441 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2442#endif
1d84e8df 2443#ifdef MPE
b0e47665 2444 PerlIO_printf(PerlIO_stdout(),
dc22e1c4 2445 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2001\n");
1d84e8df 2446#endif
9d116dd7 2447#ifdef OEMVS
b0e47665
GS
2448 PerlIO_printf(PerlIO_stdout(),
2449 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2450#endif
495c5fdc 2451#ifdef __VOS__
b0e47665
GS
2452 PerlIO_printf(PerlIO_stdout(),
2453 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2454#endif
092bebab 2455#ifdef __OPEN_VM
b0e47665
GS
2456 PerlIO_printf(PerlIO_stdout(),
2457 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2458#endif
a1a0e61e 2459#ifdef POSIX_BC
b0e47665
GS
2460 PerlIO_printf(PerlIO_stdout(),
2461 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2462#endif
61ae2fbf 2463#ifdef __MINT__
b0e47665
GS
2464 PerlIO_printf(PerlIO_stdout(),
2465 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2466#endif
f83d2536 2467#ifdef EPOC
b0e47665
GS
2468 PerlIO_printf(PerlIO_stdout(),
2469 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2470#endif
e1caacb4
JH
2471#ifdef UNDER_CE
2472 printf("WINCE port by Rainer Keuchel, 2001\n");
2473 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2474 wce_hitreturn();
2475#endif
baed7233
DL
2476#ifdef BINARY_BUILD_NOTICE
2477 BINARY_BUILD_NOTICE;
2478#endif
b0e47665
GS
2479 PerlIO_printf(PerlIO_stdout(),
2480 "\n\
79072805 2481Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2482GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2483Complete documentation for Perl, including FAQ lists, should be found on\n\
2484this system using `man perl' or `perldoc perl'. If you have access to the\n\
2485Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2486 PerlProc_exit(0);
79072805 2487 case 'w':
599cee73 2488 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2489 PL_dowarn |= G_WARN_ON;
599cee73
PM
2490 s++;
2491 return s;
2492 case 'W':
ac27b0f5 2493 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
d3a7d8c7 2494 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2495 s++;
2496 return s;
2497 case 'X':
ac27b0f5 2498 PL_dowarn = G_WARN_ALL_OFF;
d3a7d8c7 2499 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2500 s++;
2501 return s;
a0d0e21e 2502 case '*':
79072805
LW
2503 case ' ':
2504 if (s[1] == '-') /* Additional switches on #! line. */
2505 return s+2;
2506 break;
a0d0e21e 2507 case '-':
79072805 2508 case 0:
51882d45 2509#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2510 case '\r':
2511#endif
79072805
LW
2512 case '\n':
2513 case '\t':
2514 break;
aa689395
PP
2515#ifdef ALTERNATE_SHEBANG
2516 case 'S': /* OS/2 needs -S on "extproc" line. */
2517 break;
2518#endif
a0d0e21e 2519 case 'P':
3280af22 2520 if (PL_preprocess)
a0d0e21e
LW
2521 return s+1;
2522 /* FALL THROUGH */
79072805 2523 default:
cea2e8a9 2524 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2525 }
2526 return Nullch;
2527}
2528
2529/* compliments of Tom Christiansen */
2530
2531/* unexec() can be found in the Gnu emacs distribution */
ee580363 2532/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2533
2534void
864dbfa3 2535Perl_my_unexec(pTHX)
79072805
LW
2536{
2537#ifdef UNEXEC
46fc3d4c
PP
2538 SV* prog;
2539 SV* file;
ee580363 2540 int status = 1;
79072805
LW
2541 extern int etext;
2542
ee580363 2543 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2544 sv_catpv(prog, "/perl");
6b88bc9c 2545 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2546 sv_catpv(file, ".perldump");
79072805 2547
ee580363
GS
2548 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2549 /* unexec prints msg to stderr in case of failure */
6ad3d225 2550 PerlProc_exit(status);
79072805 2551#else
a5f75d66
AD
2552# ifdef VMS
2553# include <lib$routines.h>
2554 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2555# else
79072805 2556 ABORT(); /* for use with undump */
aa689395 2557# endif
a5f75d66 2558#endif
79072805
LW
2559}
2560
cb68f92d
GS
2561/* initialize curinterp */
2562STATIC void
cea2e8a9 2563S_init_interp(pTHX)
cb68f92d
GS
2564{
2565
acfe0abc
GS
2566#ifdef MULTIPLICITY
2567# define PERLVAR(var,type)
2568# define PERLVARA(var,n,type)
2569# if defined(PERL_IMPLICIT_CONTEXT)
2570# if defined(USE_5005THREADS)
2571# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2572# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
2573# else /* !USE_5005THREADS */
2574# define PERLVARI(var,type,init) aTHX->var = init;
2575# define PERLVARIC(var,type,init) aTHX->var = init;
2576# endif /* USE_5005THREADS */
3967c732 2577# else
acfe0abc
GS
2578# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2579# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2580# endif
acfe0abc
GS
2581# include "intrpvar.h"
2582# ifndef USE_5005THREADS
2583# include "thrdvar.h"
2584# endif
2585# undef PERLVAR
2586# undef PERLVARA
2587# undef PERLVARI
2588# undef PERLVARIC
2589#else
2590# define PERLVAR(var,type)
2591# define PERLVARA(var,n,type)
2592# define PERLVARI(var,type,init) PL_##var = init;
2593# define PERLVARIC(var,type,init) PL_##var = init;
2594# include "intrpvar.h"
2595# ifndef USE_5005THREADS
2596# include "thrdvar.h"
2597# endif
2598# undef PERLVAR
2599# undef PERLVARA
2600# undef PERLVARI
2601# undef PERLVARIC
cb68f92d
GS
2602#endif
2603
cb68f92d
GS
2604}
2605
76e3520e 2606STATIC void
cea2e8a9 2607S_init_main_stash(pTHX)
79072805 2608{
463ee0b2 2609 GV *gv;
6e72f9df 2610
3d47000e 2611
ac27b0f5 2612
3280af22 2613 PL_curstash = PL_defstash = newHV();
79cb57f6 2614 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
2615 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2616 SvREFCNT_dec(GvHV(gv));
3280af22 2617 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2618 SvREADONLY_on(gv);
3280af22
NIS
2619 HvNAME(PL_defstash) = savepv("main");
2620 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2621 GvMULTI_on(PL_incgv);
2622 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2623 GvMULTI_on(PL_hintgv);
2624 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2625 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2626 GvMULTI_on(PL_errgv);
2627 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2628 GvMULTI_on(PL_replgv);
cea2e8a9 2629 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
2630 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2631 sv_setpvn(ERRSV, "", 0);
3280af22 2632 PL_curstash = PL_defstash;
11faa288 2633 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2634 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2635 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2636 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2637 /* We must init $/ before switches are processed. */
864dbfa3 2638 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
2639}
2640
76e3520e 2641STATIC void
cea2e8a9 2642S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2643{
6c4ab083 2644 *fdscript = -1;
79072805 2645
3280af22
NIS
2646 if (PL_e_script) {
2647 PL_origfilename = savepv("-e");
96436eeb 2648 }
6c4ab083
GS
2649 else {
2650 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2651 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
2652
2653 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2654 char *s = scriptname + 8;
2655 *fdscript = atoi(s);
2656 while (isDIGIT(*s))
2657 s++;
2658 if (*s) {
2659 scriptname = savepv(s + 1);
3280af22
NIS
2660 Safefree(PL_origfilename);
2661 PL_origfilename = scriptname;
6c4ab083
GS
2662 }
2663 }
2664 }
2665
f4dd75d9
GS
2666#ifdef USE_ITHREADS
2667 Safefree(CopFILE(PL_curcop));
2668#else
2669 SvREFCNT_dec(CopFILEGV(PL_curcop));
2670#endif
57843af0 2671 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2672 if (strEQ(PL_origfilename,"-"))
79072805 2673 scriptname = "";
01f988be 2674 if (*fdscript >= 0) {
3280af22 2675 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
96436eeb 2676#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS
2677 if (PL_rsfp)
2678 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb
PP
2679#endif
2680 }
3280af22 2681 else if (PL_preprocess) {
46fc3d4c 2682 char *cpp_cfg = CPPSTDIN;
79cb57f6 2683 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
2684 SV *cmd = NEWSV(0,0);
2685
2686 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2687 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2688 sv_catpv(cpp, cpp_cfg);
79072805 2689
0df16ed7 2690 sv_catpvn(sv, "-I", 2);
fed7345c 2691 sv_catpv(sv,PRIVLIB_EXP);
46fc3d4c 2692
14953ddc
MB
2693 DEBUG_P(PerlIO_printf(Perl_debug_log,
2694 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2695 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
52853b95 2696#if defined(MSDOS) || defined(WIN32)
cea2e8a9 2697 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW
2698sed %s -e \"/^[^#]/b\" \
2699 -e \"/^#[ ]*include[ ]/b\" \
2700 -e \"/^#[ ]*define[ ]/b\" \
2701 -e \"/^#[ ]*if[ ]/b\" \
2702 -e \"/^#[ ]*ifdef[ ]/b\" \
2703 -e \"/^#[ ]*ifndef[ ]/b\" \
2704 -e \"/^#[ ]*else/b\" \
2705 -e \"/^#[ ]*elif[ ]/b\" \
2706 -e \"/^#[ ]*undef[ ]/b\" \
2707 -e \"/^#[ ]*endif/b\" \
2708 -e \"s/^#.*//\" \
894356b3 2709 %s | %"SVf" -C %"SVf" %s",
6b88bc9c 2710 (PL_doextract ? "-e \"1,/^#/d\n\"" : ""),
79072805 2711#else
092bebab 2712# ifdef __OPEN_VM
cea2e8a9 2713 Perl_sv_setpvf(aTHX_ cmd, "\
092bebab
JH
2714%s %s -e '/^[^#]/b' \
2715 -e '/^#[ ]*include[ ]/b' \
2716 -e '/^#[ ]*define[ ]/b' \
2717 -e '/^#[ ]*if[ ]/b' \
2718 -e '/^#[ ]*ifdef[ ]/b' \
2719 -e '/^#[ ]*ifndef[ ]/b' \
2720 -e '/^#[ ]*else/b' \
2721 -e '/^#[ ]*elif[ ]/b' \
2722 -e '/^#[ ]*undef[ ]/b' \
2723 -e '/^#[ ]*endif/b' \
2724 -e 's/^[ ]*#.*//' \
894356b3 2725 %s | %"SVf" %"SVf" %s",
092bebab 2726# else
cea2e8a9 2727 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW
2728%s %s -e '/^[^#]/b' \
2729 -e '/^#[ ]*include[ ]/b' \
2730 -e '/^#[ ]*define[ ]/b' \
2731 -e '/^#[ ]*if[ ]/b' \
2732 -e '/^#[ ]*ifdef[ ]/b' \
2733 -e '/^#[ ]*ifndef[ ]/b' \
2734 -e '/^#[ ]*else/b' \
2735 -e '/^#[ ]*elif[ ]/b' \
2736 -e '/^#[ ]*undef[ ]/b' \
2737 -e '/^#[ ]*endif/b' \
2738 -e 's/^[ ]*#.*//' \
894356b3 2739 %s | %"SVf" -C %"SVf" %s",
092bebab 2740# endif
79072805
LW
2741#ifdef LOC_SED
2742 LOC_SED,
2743#else
2744 "sed",
2745#endif
3280af22 2746 (PL_doextract ? "-e '1,/^#/d\n'" : ""),
79072805 2747#endif
46fc3d4c 2748 scriptname, cpp, sv, CPPMINUS);
3280af22 2749 PL_doextract = FALSE;
79072805 2750#ifdef IAMSUID /* actually, this is caught earlier */
b28d0864 2751 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
79072805 2752#ifdef HAS_SETEUID
b28d0864 2753 (void)seteuid(PL_uid); /* musn't stay setuid root */
79072805
LW
2754#else
2755#ifdef HAS_SETREUID
b28d0864 2756 (void)setreuid((Uid_t)-1, PL_uid);
85e6fe83
LW
2757#else
2758#ifdef HAS_SETRESUID
b28d0864 2759 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
79072805 2760#else
b28d0864 2761 PerlProc_setuid(PL_uid);
79072805
LW
2762#endif
2763#endif
85e6fe83 2764#endif
b28d0864 2765 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2766 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805
LW
2767 }
2768#endif /* IAMSUID */
3280af22 2769 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c
PP
2770 SvREFCNT_dec(cmd);
2771 SvREFCNT_dec(cpp);
79072805
LW
2772 }
2773 else if (!*scriptname) {
bbce6d69 2774 forbid_setid("program input from stdin");
3280af22 2775 PL_rsfp = PerlIO_stdin();
79072805 2776 }
96436eeb 2777 else {
3280af22 2778 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
96436eeb 2779#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS
2780 if (PL_rsfp)
2781 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb
PP
2782#endif
2783 }
3280af22 2784 if (!PL_rsfp) {
13281fa4 2785#ifdef DOSUID
a687059c 2786#ifndef IAMSUID /* in case script is not readable before setuid */
6b88bc9c 2787 if (PL_euid &&
cc49e20b 2788 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
6b88bc9c
GS
2789 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2790 {
46fc3d4c 2791 /* try again */
a7cb1f99 2792 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
2793 (int)PERL_REVISION, (int)PERL_VERSION,
2794 (int)PERL_SUBVERSION), PL_origargv);
cea2e8a9 2795 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
2796 }
2797#endif
2798#endif
584d69ec
JH
2799#ifdef IAMSUID
2800 errno = EPERM;
2801 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2802 Strerror(errno));
2803#else
cea2e8a9 2804 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
cc49e20b 2805 CopFILE(PL_curcop), Strerror(errno));
584d69ec 2806#endif
13281fa4 2807 }
79072805 2808}
8d063cd8 2809
7b89560d
JH
2810/* Mention
2811 * I_SYSSTATVFS HAS_FSTATVFS
2812 * I_SYSMOUNT
c890dc6c 2813 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
2814 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2815 * here so that metaconfig picks them up. */
2816
104d25b7 2817#ifdef IAMSUID
864dbfa3 2818STATIC int
e688b231 2819S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2820{
0545a864
JH
2821 int check_okay = 0; /* able to do all the required sys/libcalls */
2822 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2823/*
ad27e871 2824 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2825 * fstatvfs() is UNIX98.
0545a864 2826 * fstatfs() is 4.3 BSD.
ad27e871 2827 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
2828 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2829 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
2830 */
2831
6439433f
JH
2832#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2833
2834# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2835 defined(HAS_FSTATVFS)
2836# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2837 struct statvfs stfs;
6439433f 2838
104d25b7
JH
2839 check_okay = fstatvfs(fd, &stfs) == 0;
2840 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2841# endif /* fstatvfs */
ac27b0f5 2842
6439433f
JH
2843# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2844 defined(PERL_MOUNT_NOSUID) && \
2845 defined(HAS_FSTATFS) && \
2846 defined(HAS_STRUCT_STATFS) && \
2847 defined(HAS_STRUCT_STATFS_F_FLAGS)
2848# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2849 struct statfs stfs;
6439433f 2850
104d25b7 2851 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2852 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH
2853# endif /* fstatfs */
2854
2855# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2856 defined(PERL_MOUNT_NOSUID) && \
2857 defined(HAS_FSTAT) && \
2858 defined(HAS_USTAT) && \
2859 defined(HAS_GETMNT) && \
2860 defined(HAS_STRUCT_FS_DATA) && \
2861 defined(NOSTAT_ONE)
2862# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2863 struct stat fdst;
6439433f 2864
0545a864 2865 if (fstat(fd, &fdst) == 0) {
6439433f
JH
2866 struct ustat us;
2867 if (ustat(fdst.st_dev, &us) == 0) {
2868 struct fs_data fsd;
2869 /* NOSTAT_ONE here because we're not examining fields which
2870 * vary between that case and STAT_ONE. */
ad27e871 2871 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
2872 size_t cmplen = sizeof(us.f_fname);
2873 if (sizeof(fsd.fd_req.path) < cmplen)
2874 cmplen = sizeof(fsd.fd_req.path);
2875 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2876 fdst.st_dev == fsd.fd_req.dev) {
2877 check_okay = 1;
2878 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2879 }
2880 }
2881 }
2882 }
0545a864 2883 }
6439433f
JH
2884# endif /* fstat+ustat+getmnt */
2885
2886# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2887 defined(HAS_GETMNTENT) && \
2888 defined(HAS_HASMNTOPT) && \
2889 defined(MNTOPT_NOSUID)
2890# define FD_ON_NOSUID_CHECK_OKAY
2891 FILE *mtab = fopen("/etc/mtab", "r");
2892 struct mntent *entry;
2893 struct stat stb, fsb;
104d25b7
JH
2894
2895 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
2896 while (entry = getmntent(mtab)) {
2897 if (stat(entry->mnt_dir, &fsb) == 0
2898 && fsb.st_dev == stb.st_dev)
2899 {
2900 /* found the filesystem */
2901 check_okay = 1;
2902 if (hasmntopt(entry, MNTOPT_NOSUID))
2903 on_nosuid = 1;
2904 break;
2905 } /* A single fs may well fail its stat(). */
2906 }
104d25b7
JH
2907 }
2908 if (mtab)
6439433f
JH
2909 fclose(mtab);
2910# endif /* getmntent+hasmntopt */
0545a864 2911
ac27b0f5 2912 if (!check_okay)
0545a864 2913 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH
2914 return on_nosuid;
2915}
2916#endif /* IAMSUID */
2917
76e3520e 2918STATIC void
cea2e8a9 2919S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2920{
155aba94 2921#ifdef IAMSUID
96436eeb 2922 int which;
155aba94 2923#endif
96436eeb 2924
13281fa4
LW
2925 /* do we need to emulate setuid on scripts? */
2926
2927 /* This code is for those BSD systems that have setuid #! scripts disabled
2928 * in the kernel because of a security problem. Merely defining DOSUID
2929 * in perl will not fix that problem, but if you have disabled setuid
2930 * scripts in the kernel, this will attempt to emulate setuid and setgid
2931 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
2932 * root version must be called suidperl or sperlN.NNN. If regular perl
2933 * discovers that it has opened a setuid script, it calls suidperl with
2934 * the same argv that it had. If suidperl finds that the script it has
2935 * just opened is NOT setuid root, it sets the effective uid back to the
2936 * uid. We don't just make perl setuid root because that loses the
2937 * effective uid we had before invoking perl, if it was different from the
2938 * uid.
13281fa4
LW
2939 *
2940 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2941 * be defined in suidperl only. suidperl must be setuid root. The
2942 * Configure script will set this up for you if you want it.
2943 */
a687059c 2944
13281fa4 2945#ifdef DOSUID
6e72f9df 2946 char *s, *s2;
a0d0e21e 2947
b28d0864 2948 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2949 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2950 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2951 I32 len;
2d8e6c8d 2952 STRLEN n_a;
13281fa4 2953
a687059c 2954#ifdef IAMSUID
fe14fcc3 2955#ifndef HAS_SETREUID
a687059c
LW
2956 /* On this access check to make sure the directories are readable,
2957 * there is actually a small window that the user could use to make
2958 * filename point to an accessible directory. So there is a faint
2959 * chance that someone could execute a setuid script down in a
2960 * non-accessible directory. I don't know what to do about that.
2961 * But I don't think it's too important. The manual lies when
2962 * it says access() is useful in setuid programs.
2963 */
cc49e20b 2964 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2965 Perl_croak(aTHX_ "Permission denied");
a687059c
LW
2966#else
2967 /* If we can swap euid and uid, then we can determine access rights
2968 * with a simple stat of the file, and then compare device and
2969 * inode to make sure we did stat() on the same file we opened.
2970 * Then we just have to make sure he or she can execute it.
2971 */
2972 {
2973 struct stat tmpstatbuf;
2974
85e6fe83
LW
2975 if (
2976#ifdef HAS_SETREUID
b28d0864 2977 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW
2978#else
2979# if HAS_SETRESUID
b28d0864 2980 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 2981# endif
85e6fe83 2982#endif
b28d0864 2983 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 2984 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 2985 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 2986 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 2987#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 2988 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 2989 Perl_croak(aTHX_ "Permission denied");
104d25b7 2990#endif
b28d0864
NIS
2991 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
2992 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
2993 (void)PerlIO_close(PL_rsfp);
cea2e8a9 2994 Perl_croak(aTHX_ "Permission denied\n");
a687059c 2995 }
85e6fe83
LW
2996 if (
2997#ifdef HAS_SETREUID
b28d0864 2998 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW
2999#else
3000# if defined(HAS_SETRESUID)
b28d0864 3001 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3002# endif
85e6fe83 3003#endif
b28d0864 3004 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3005 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3006 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3007 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3008 }
fe14fcc3 3009#endif /* HAS_SETREUID */
a687059c
LW
3010#endif /* IAMSUID */
3011
b28d0864 3012 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3013 Perl_croak(aTHX_ "Permission denied");
b28d0864 3014 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3015 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3016 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3017 CopLINE_inc(PL_curcop);
6b88bc9c 3018 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3019 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3020 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3021 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3022 if (*s == ' ') s++;
45d8adaa 3023 while (!isSPACE(*s)) s++;
2d8e6c8d 3024 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df
PP
3025 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3026 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3027 Perl_croak(aTHX_ "Not a perl script");
a687059c 3028 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3029 /*
3030 * #! arg must be what we saw above. They can invoke it by
3031 * mentioning suidperl explicitly, but they may not add any strange
3032 * arguments beyond what #! says if they do invoke suidperl that way.
3033 */
3034 len = strlen(validarg);
3035 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3036 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3037 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW
3038
3039#ifndef IAMSUID
b28d0864
NIS
3040 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3041 PL_euid == PL_statbuf.st_uid)
3042 if (!PL_do_undump)
cea2e8a9 3043 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3044FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3045#endif /* IAMSUID */
13281fa4 3046
b28d0864
NIS
3047 if (PL_euid) { /* oops, we're not the setuid root perl */
3048 (void)PerlIO_close(PL_rsfp);
13281fa4 3049#ifndef IAMSUID
46fc3d4c 3050 /* try again */
a7cb1f99 3051 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3052 (int)PERL_REVISION, (int)PERL_VERSION,
3053 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3054#endif
cea2e8a9 3055 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
3056 }
3057
b28d0864 3058 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3059#ifdef HAS_SETEGID
b28d0864 3060 (void)setegid(PL_statbuf.st_gid);
a687059c 3061#else
fe14fcc3 3062#ifdef HAS_SETREGID
b28d0864 3063 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW
3064#else
3065#ifdef HAS_SETRESGID
b28d0864 3066 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3067#else
b28d0864 3068 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW
3069#endif
3070#endif
85e6fe83 3071#endif
b28d0864 3072 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3073 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3074 }
b28d0864
NIS
3075 if (PL_statbuf.st_mode & S_ISUID) {
3076 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3077#ifdef HAS_SETEUID
b28d0864 3078 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3079#else
fe14fcc3 3080#ifdef HAS_SETREUID
b28d0864 3081 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW
3082#else
3083#ifdef HAS_SETRESUID
b28d0864 3084 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3085#else
b28d0864 3086 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW
3087#endif
3088#endif
85e6fe83 3089#endif
b28d0864 3090 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3091 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3092 }
b28d0864 3093 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3094#ifdef HAS_SETEUID
b28d0864 3095 (void)seteuid((Uid_t)PL_uid);
a687059c 3096#else
fe14fcc3 3097#ifdef HAS_SETREUID
b28d0864 3098 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3099#else
85e6fe83 3100#ifdef HAS_SETRESUID
b28d0864 3101 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3102#else
b28d0864 3103 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3104#endif
a687059c
LW
3105#endif
3106#endif
b28d0864 3107 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3108 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3109 }
748a9306 3110 init_ids();
b28d0864 3111 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3112 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW
3113 }
3114#ifdef IAMSUID
6b88bc9c 3115 else if (PL_preprocess)
cea2e8a9 3116 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3117 else if (fdscript >= 0)
cea2e8a9 3118 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3119 else
cea2e8a9 3120 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb
PP
3121
3122 /* We absolutely must clear out any saved ids here, so we */
3123 /* exec the real perl, substituting fd script for scriptname. */
3124 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS
3125 PerlIO_rewind(PL_rsfp);
3126 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS
3127 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3128 if (!PL_origargv[which])
cea2e8a9
GS
3129 Perl_croak(aTHX_ "Permission denied");
3130 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3131 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3132#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3133 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3134#endif
a7cb1f99 3135 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3136 (int)PERL_REVISION, (int)PERL_VERSION,
3137 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3138 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3139#endif /* IAMSUID */
a687059c 3140#else /* !DOSUID */
3280af22 3141 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3142#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS
3143 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3144 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3145 ||
b28d0864 3146 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3147 )
b28d0864 3148 if (!PL_do_undump)
cea2e8a9 3149 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3150FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3151#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3152 /* not set-id, must be wrapped */
a687059c 3153 }
13281fa4 3154#endif /* DOSUID */
79072805 3155}
13281fa4 3156
76e3520e 3157STATIC void
cea2e8a9 3158S_find_beginning(pTHX)
79072805 3159{
6e72f9df 3160 register char *s, *s2;
33b78306
LW
3161
3162 /* skip forward in input to the real script? */
3163
bbce6d69 3164 forbid_setid("-x");
bf4acbe4 3165#ifdef MACOS_TRADITIONAL
084592ab 3166 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3167
bf4acbe4
GS
3168 while (PL_doextract || gMacPerl_AlwaysExtract) {
3169 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3170 if (!gMacPerl_AlwaysExtract)
3171 Perl_croak(aTHX_ "No Perl script found in input\n");
3172
3173 if (PL_doextract) /* require explicit override ? */
3174 if (!OverrideExtract(PL_origfilename))
3175 Perl_croak(aTHX_ "User aborted script\n");
3176 else
3177 PL_doextract = FALSE;
3178
3179 /* Pater peccavi, file does not have #! */
3180 PerlIO_rewind(PL_rsfp);
ac27b0f5 3181
bf4acbe4
GS
3182 break;
3183 }
3184#else
3280af22
NIS
3185 while (PL_doextract) {
3186 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3187 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3188#endif
4f0c37ba
IZ
3189 s2 = s;
3190 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS
3191 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3192 PL_doextract = FALSE;
6e72f9df
PP
3193 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3194 s2 = s;
3195 while (*s == ' ' || *s == '\t') s++;
3196 if (*s++ == '-') {
3197 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3198 if (strnEQ(s2-4,"perl",4))
3199 /*SUPPRESS 530*/
155aba94
GS
3200 while ((s = moreswitches(s)))
3201 ;
33b78306 3202 }
95e8664e
CN
3203#ifdef MACOS_TRADITIONAL
3204 break;
3205#endif
83025b21
LW
3206 }
3207 }
3208}
3209
afe37c7d 3210
76e3520e 3211STATIC void
cea2e8a9 3212S_init_ids(pTHX)
352d5a3a 3213{
d8eceb89
JH
3214 PL_uid = PerlProc_getuid();
3215 PL_euid = PerlProc_geteuid();
3216 PL_gid = PerlProc_getgid();
3217 PL_egid = PerlProc_getegid();
748a9306 3218#ifdef VMS
b28d0864
NIS
3219 PL_uid |= PL_gid << 16;
3220 PL_euid |= PL_egid << 16;
748a9306 3221#endif
3280af22 3222 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3223}
79072805 3224
76e3520e 3225STATIC void
cea2e8a9 3226S_forbid_setid(pTHX_ char *s)
bbce6d69 3227{
3280af22 3228 if (PL_euid != PL_uid)
cea2e8a9 3229 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3230 if (PL_egid != PL_gid)
cea2e8a9 3231 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69
PP
3232}
3233
1ee4443e
IZ
3234void
3235Perl_init_debugger(pTHX)
748a9306 3236{
1ee4443e
IZ
3237 HV *ostash = PL_curstash;
3238
3280af22
NIS
3239 PL_curstash = PL_debstash;
3240 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3241 AvREAL_off(PL_dbargs);
3242 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3243 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3244 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3245 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3246 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3247 sv_setiv(PL_DBsingle, 0);
3280af22 3248 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3249 sv_setiv(PL_DBtrace, 0);
3280af22 3250 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3251 sv_setiv(PL_DBsignal, 0);
1ee4443e 3252 PL_curstash = ostash;
352d5a3a
LW
3253}
3254
2ce36478
SM
3255#ifndef STRESS_REALLOC
3256#define REASONABLE(size) (size)
3257#else
3258#define REASONABLE(size) (1) /* unreasonable */
3259#endif
3260
11343788 3261void
cea2e8a9 3262Perl_init_stacks(pTHX)
79072805 3263{
e336de0d 3264 /* start with 128-item stack and 8K cxstack */
3280af22 3265 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3266 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS
3267 PL_curstackinfo->si_type = PERLSI_MAIN;
3268 PL_curstack = PL_curstackinfo->si_stack;
3269 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3270
3280af22
NIS
3271 PL_stack_base = AvARRAY(PL_curstack);
3272 PL_stack_sp = PL_stack_base;
3273 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3274
3280af22
NIS
3275 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3276 PL_tmps_floor = -1;
3277 PL_tmps_ix = -1;
3278 PL_tmps_max = REASONABLE(128);
8990e307 3279
3280af22
NIS
3280 New(54,PL_markstack,REASONABLE(32),I32);
3281 PL_markstack_ptr = PL_markstack;
3282 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3283
ce2f7c3b 3284 SET_MARK_OFFSET;
e336de0d 3285
3280af22
NIS
3286 New(54,PL_scopestack,REASONABLE(32),I32);
3287 PL_scopestack_ix = 0;
3288 PL_scopestack_max = REASONABLE(32);
79072805 3289
3280af22
NIS
3290 New(54,PL_savestack,REASONABLE(128),ANY);
3291 PL_savestack_ix = 0;
3292 PL_savestack_max = REASONABLE(128);
79072805 3293
3280af22
NIS
3294 New(54,PL_retstack,REASONABLE(16),OP*);
3295 PL_retstack_ix = 0;
3296 PL_retstack_max = REASONABLE(16);
378cc40b 3297}
33b78306 3298
2ce36478
SM
3299#undef REASONABLE
3300
76e3520e 3301STATIC void
cea2e8a9 3302S_nuke_stacks(pTHX)
6e72f9df 3303{
3280af22
NIS
3304 while (PL_curstackinfo->si_next)
3305 PL_curstackinfo = PL_curstackinfo->si_next;
3306 while (PL_curstackinfo) {
3307 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3308 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS
3309 Safefree(PL_curstackinfo->si_cxstack);
3310 Safefree(PL_curstackinfo);
3311 PL_curstackinfo = p;
e336de0d 3312 }
3280af22
NIS
3313 Safefree(PL_tmps_stack);
3314 Safefree(PL_markstack);
3315 Safefree(PL_scopestack);
3316 Safefree(PL_savestack);
3317 Safefree(PL_retstack);
378cc40b 3318}
33b78306 3319
76e3520e 3320STATIC void
cea2e8a9 3321S_init_lexer(pTHX)
8990e307 3322{
06039172 3323 PerlIO *tmpfp;
3280af22
NIS
3324 tmpfp = PL_rsfp;
3325 PL_rsfp = Nullfp;
3326 lex_start(PL_linestr);
3327 PL_rsfp = tmpfp;
79cb57f6 3328 PL_subname = newSVpvn("main",4);
8990e307
LW
3329}
3330
76e3520e 3331STATIC void
cea2e8a9 3332S_init_predump_symbols(pTHX)
45d8adaa 3333{
93a17b20 3334 GV *tmpgv;
af8c498a 3335 IO *io;
79072805 3336
864dbfa3 3337 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS
3338 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3339 GvMULTI_on(PL_stdingv);
af8c498a 3340 io = GvIOp(PL_stdingv);
a04651f4 3341 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3342 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3343 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3344 GvMULTI_on(tmpgv);
af8c498a 3345 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3346
85e6fe83 3347 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3348 GvMULTI_on(tmpgv);
af8c498a 3349 io = GvIOp(tmpgv);
a04651f4 3350 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3351 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3352 setdefout(tmpgv);
adbc6bb1 3353 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3354 GvMULTI_on(tmpgv);
af8c498a 3355 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3356
bf49b057
GS
3357 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3358 GvMULTI_on(PL_stderrgv);
3359 io = GvIOp(PL_stderrgv);
a04651f4 3360 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3361 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3362 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3363 GvMULTI_on(tmpgv);
af8c498a 3364 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3365
3280af22 3366 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3367
bf4acbe4
GS
3368 if (PL_osname)
3369 Safefree(PL_osname);
3370 PL_osname = savepv(OSNAME);
79072805 3371}
33b78306 3372
a11ec5a9
RGS
3373void
3374Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
33b78306 3375{
79072805 3376 char *s;
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 }
a11ec5a9
RGS
3394 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3395 GvMULTI_on(PL_argvgv);
3396 (void)gv_AVadd(PL_argvgv);
3397 av_clear(GvAVn(PL_argvgv));
3398 for (; argc > 0; argc--,argv++) {
3399 SV *sv = newSVpv(argv[0],0);
3400 av_push(GvAVn(PL_argvgv),sv);
3401 if (PL_widesyscalls)
3402 (void)sv_utf8_decode(sv);
3403 }
3404 }
3405}
3406
3407STATIC void
3408S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3409{
3410 char *s;
3411 SV *sv;
3412 GV* tmpgv;
3413#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
3414 char **dup_env_base = 0;
3415 int dup_env_count = 0;
3416#endif
3417
3280af22
NIS
3418 PL_toptarget = NEWSV(0,0);
3419 sv_upgrade(PL_toptarget, SVt_PVFM);
3420 sv_setpvn(PL_toptarget, "", 0);
3421 PL_bodytarget = NEWSV(0,0);
3422 sv_upgrade(PL_bodytarget, SVt_PVFM);
3423 sv_setpvn(PL_bodytarget, "", 0);
3424 PL_formtarget = PL_bodytarget;
79072805 3425
bbce6d69 3426 TAINT;
a11ec5a9
RGS
3427
3428 init_argv_symbols(argc,argv);
3429
155aba94 3430 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS
3431#ifdef MACOS_TRADITIONAL
3432 /* $0 is not majick on a Mac */
3433 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3434#else
3280af22 3435 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3436 magicname("0", "0", 1);
bf4acbe4 3437#endif
79072805 3438 }
155aba94 3439 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV)))
ed344e4f 3440#ifdef OS2
23da6c43 3441 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
ed344e4f 3442#else
3280af22 3443 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
ed344e4f 3444#endif
155aba94 3445 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
79072805 3446 HV *hv;
3280af22
NIS
3447 GvMULTI_on(PL_envgv);
3448 hv = GvHVn(PL_envgv);
14befaf4 3449 hv_magic(hv, Nullgv, PERL_MAGIC_env);
fa6a1c44 3450#ifdef USE_ENVIRON_ARRAY
4633a7c4
LW
3451 /* Note that if the supplied env parameter is actually a copy
3452 of the global environ then it may now point to free'd memory
3453 if the environment has been modified since. To avoid this
3454 problem we treat env==NULL as meaning 'use the default'
3455 */
3456 if (!env)
3457 env = environ;
5aabfad6 3458 if (env != environ)
79072805 3459 environ[0] = Nullch;
103a7189
JH
3460#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
3461 {
3462 char **env_base;
9041c2e3 3463 for (env_base = env; *env; env++)
103a7189
JH
3464 dup_env_count++;
3465 if ((dup_env_base = (char **)
480bfd1e