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PerlIO layer table as PL_perlio (per-interpreter)
[perl5.git] / perl.c
CommitLineData
a0d0e21e
LW
1/* perl.c
2 *
bc89e66f 3 * Copyright (c) 1987-2001 Larry Wall
a687059c 4 *
352d5a3a
LW
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
a687059c 7 *
8d063cd8
LW
8 */
9
a0d0e21e
LW
10/*
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
12 */
45d8adaa 13
378cc40b 14#include "EXTERN.h"
864dbfa3 15#define PERL_IN_PERL_C
378cc40b 16#include "perl.h"
e3321bb0 17#include "patchlevel.h" /* for local_patches */
378cc40b 18
df5cef82 19/* XXX If this causes problems, set i_unistd=undef in the hint file. */
a0d0e21e
LW
20#ifdef I_UNISTD
21#include <unistd.h>
22#endif
a0d0e21e 23
54310121 24#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
20ce7b12 25char *getenv (char *); /* Usually in <stdlib.h> */
54310121
PP
26#endif
27
acfe0abc 28static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
0cb96387 29
a687059c
LW
30#ifdef IAMSUID
31#ifndef DOSUID
32#define DOSUID
33#endif
34#endif
378cc40b 35
a687059c
LW
36#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
37#ifdef DOSUID
38#undef DOSUID
39#endif
40#endif
8d063cd8 41
4d1ff10f 42#if defined(USE_5005THREADS)
06d86050
GS
43# define INIT_TLS_AND_INTERP \
44 STMT_START { \
45 if (!PL_curinterp) { \
46 PERL_SET_INTERP(my_perl); \
47 INIT_THREADS; \
48 ALLOC_THREAD_KEY; \
49 } \
50 } STMT_END
51#else
52# if defined(USE_ITHREADS)
53# define INIT_TLS_AND_INTERP \
54 STMT_START { \
55 if (!PL_curinterp) { \
56 PERL_SET_INTERP(my_perl); \
57 INIT_THREADS; \
58 ALLOC_THREAD_KEY; \
534825c4
GS
59 PERL_SET_THX(my_perl); \
60 OP_REFCNT_INIT; \
61 } \
62 else { \
63 PERL_SET_THX(my_perl); \
06d86050 64 } \
06d86050
GS
65 } STMT_END
66# else
67# define INIT_TLS_AND_INTERP \
68 STMT_START { \
69 if (!PL_curinterp) { \
70 PERL_SET_INTERP(my_perl); \
71 } \
72 PERL_SET_THX(my_perl); \
73 } STMT_END
74# endif
75#endif
76
32e30700
GS
77#ifdef PERL_IMPLICIT_SYS
78PerlInterpreter *
7766f137
GS
79perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
80 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
32e30700
GS
81 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
82 struct IPerlDir* ipD, struct IPerlSock* ipS,
83 struct IPerlProc* ipP)
84{
85 PerlInterpreter *my_perl;
32e30700
GS
86 /* New() needs interpreter, so call malloc() instead */
87 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 88 INIT_TLS_AND_INTERP;
32e30700
GS
89 Zero(my_perl, 1, PerlInterpreter);
90 PL_Mem = ipM;
7766f137
GS
91 PL_MemShared = ipMS;
92 PL_MemParse = ipMP;
32e30700
GS
93 PL_Env = ipE;
94 PL_StdIO = ipStd;
95 PL_LIO = ipLIO;
96 PL_Dir = ipD;
97 PL_Sock = ipS;
98 PL_Proc = ipP;
7766f137 99
32e30700
GS
100 return my_perl;
101}
102#else
954c1994
GS
103
104/*
105=for apidoc perl_alloc
106
107Allocates a new Perl interpreter. See L<perlembed>.
108
109=cut
110*/
111
93a17b20 112PerlInterpreter *
cea2e8a9 113perl_alloc(void)
79072805 114{
cea2e8a9 115 PerlInterpreter *my_perl;
79072805 116
54aff467 117 /* New() needs interpreter, so call malloc() instead */
e8ee3774 118 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 119
06d86050 120 INIT_TLS_AND_INTERP;
dedcbb81 121 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 122 return my_perl;
79072805 123}
32e30700 124#endif /* PERL_IMPLICIT_SYS */
79072805 125
954c1994
GS
126/*
127=for apidoc perl_construct
128
129Initializes a new Perl interpreter. See L<perlembed>.
130
131=cut
132*/
133
79072805 134void
0cb96387 135perl_construct(pTHXx)
79072805 136{
4d1ff10f 137#ifdef USE_5005THREADS
a863c7d1 138#ifndef FAKE_THREADS
e1f15930 139 struct perl_thread *thr = NULL;
a863c7d1 140#endif /* FAKE_THREADS */
4d1ff10f 141#endif /* USE_5005THREADS */
ba869deb 142
8990e307 143#ifdef MULTIPLICITY
54aff467 144 init_interp();
ac27b0f5 145 PL_perl_destruct_level = 1;
54aff467
GS
146#else
147 if (PL_perl_destruct_level > 0)
148 init_interp();
149#endif
150
33f46ff6 151 /* Init the real globals (and main thread)? */
3280af22 152 if (!PL_linestr) {
4d1ff10f 153#ifdef USE_5005THREADS
533c011a 154 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB
155 /*
156 * Safe to use basic SV functions from now on (though
157 * not things like mortals or tainting yet).
158 */
533c011a
NIS
159 MUTEX_INIT(&PL_eval_mutex);
160 COND_INIT(&PL_eval_cond);
161 MUTEX_INIT(&PL_threads_mutex);
162 COND_INIT(&PL_nthreads_cond);
ba869deb 163# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 164 MUTEX_INIT(&PL_svref_mutex);
ba869deb 165# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 166
5ff3f7a4 167 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS
168 MUTEX_INIT(&PL_sv_lock_mutex);
169 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 170
199100c8 171 thr = init_main_thread();
4d1ff10f 172#endif /* USE_5005THREADS */
11343788 173
14dd3ad8 174#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 175 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 176#endif
312caa8e 177
2aea9f8a
GS
178 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
179
3280af22
NIS
180 PL_linestr = NEWSV(65,79);
181 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 182
3280af22 183 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP
184 /* set read-only and try to insure than we wont see REFCNT==0
185 very often */
186
3280af22
NIS
187 SvREADONLY_on(&PL_sv_undef);
188 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 189
3280af22
NIS
190 sv_setpv(&PL_sv_no,PL_No);
191 SvNV(&PL_sv_no);
192 SvREADONLY_on(&PL_sv_no);
193 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 194
3280af22
NIS
195 sv_setpv(&PL_sv_yes,PL_Yes);
196 SvNV(&PL_sv_yes);
197 SvREADONLY_on(&PL_sv_yes);
198 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 199 }
79072805 200
cea2e8a9 201 PL_sighandlerp = Perl_sighandler;
3280af22 202 PL_pidstatus = newHV();
44a8e56a 203
79072805
LW
204#ifdef MSDOS
205 /*
206 * There is no way we can refer to them from Perl so close them to save
207 * space. The other alternative would be to provide STDAUX and STDPRN
208 * filehandles.
209 */
2b96b0a5
JH
210 (void)PerlIO_close(PerlIO_importFILE(stdaux, 0));
211 (void)PerlIO_close(PerlIO_importFILE(stdprn, 0));
79072805
LW
212#endif
213 }
214
8bfdd7d9 215 PL_rs = newSVpvn("\n", 1);
dc92893f 216
cea2e8a9 217 init_stacks();
79072805 218
748a9306 219 init_ids();
3280af22 220 PL_lex_state = LEX_NOTPARSING;
a5f75d66 221
312caa8e 222 JMPENV_BOOTSTRAP;
f86702cc
PP
223 STATUS_ALL_SUCCESS;
224
0672f40e 225 init_i18nl10n(1);
36477c24 226 SET_NUMERIC_STANDARD();
0b5b802d 227
a7cb1f99
GS
228 {
229 U8 *s;
230 PL_patchlevel = NEWSV(0,4);
155aba94 231 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 232 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 233 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 234 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS
235 /* Build version strings using "native" characters */
236 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
237 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
238 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS
239 *s = '\0';
240 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
241 SvPOK_on(PL_patchlevel);
242 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
243 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 244#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 245 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 246#endif
a7cb1f99
GS
247 ;
248 SvNOK_on(PL_patchlevel); /* dual valued */
249 SvUTF8_on(PL_patchlevel);
250 SvREADONLY_on(PL_patchlevel);
251 }
79072805 252
ab821d7f 253#if defined(LOCAL_PATCH_COUNT)
3280af22 254 PL_localpatches = local_patches; /* For possible -v */
ab821d7f
PP
255#endif
256
52853b95
GS
257#ifdef HAVE_INTERP_INTERN
258 sys_intern_init();
259#endif
260
4b556e6c 261 PerlIO_init(); /* Hook to IO system */
760ac839 262
3280af22
NIS
263 PL_fdpid = newAV(); /* for remembering popen pids by fd */
264 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 265 PL_errors = newSVpvn("",0);
1fcf4c12 266#ifdef USE_ITHREADS
13137afc
AB
267 PL_regex_padav = newAV();
268 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
269 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 270#endif
e5dd39fc
AB
271#ifdef USE_REENTRANT_API
272 New(31337, PL_reentrant_buffer,1, REBUF);
273 New(31337, PL_reentrant_buffer->tmbuff,1, struct tm);
274#endif
3d47000e
AB
275
276 /* Note that strtab is a rather special HV. Assumptions are made
277 about not iterating on it, and not adding tie magic to it.
278 It is properly deallocated in perl_destruct() */
279 PL_strtab = newHV();
280
281#ifdef USE_5005THREADS
282 MUTEX_INIT(&PL_strtab_mutex);
283#endif
284 HvSHAREKEYS_off(PL_strtab); /* mandatory */
285 hv_ksplit(PL_strtab, 512);
286
0631ea03
AB
287#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
288 _dyld_lookup_and_bind
289 ("__environ", (unsigned long *) &environ_pointer, NULL);
290#endif /* environ */
291
292#ifdef USE_ENVIRON_ARRAY
293 PL_origenviron = environ;
294#endif
295
8990e307 296 ENTER;
79072805
LW
297}
298
954c1994
GS
299/*
300=for apidoc perl_destruct
301
302Shuts down a Perl interpreter. See L<perlembed>.
303
304=cut
305*/
306
31d77e54 307int
0cb96387 308perl_destruct(pTHXx)
79072805 309{
7c474504 310 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 311 HV *hv;
4d1ff10f 312#ifdef USE_5005THREADS
33f46ff6 313 Thread t;
cea2e8a9 314 dTHX;
4d1ff10f 315#endif /* USE_5005THREADS */
8990e307 316
7766f137
GS
317 /* wait for all pseudo-forked children to finish */
318 PERL_WAIT_FOR_CHILDREN;
319
4d1ff10f 320#ifdef USE_5005THREADS
0f15f207 321#ifndef FAKE_THREADS
8023c3ce
MB
322 /* Pass 1 on any remaining threads: detach joinables, join zombies */
323 retry_cleanup:
533c011a 324 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 325 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 326 "perl_destruct: waiting for %d threads...\n",
533c011a 327 PL_nthreads - 1));
33f46ff6 328 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB
329 MUTEX_LOCK(&t->mutex);
330 switch (ThrSTATE(t)) {
331 AV *av;
c7848ba1 332 case THRf_ZOMBIE:
bf49b057 333 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 334 "perl_destruct: joining zombie %p\n", t));
605e5515
MB
335 ThrSETSTATE(t, THRf_DEAD);
336 MUTEX_UNLOCK(&t->mutex);
533c011a 337 PL_nthreads--;
8023c3ce
MB
338 /*
339 * The SvREFCNT_dec below may take a long time (e.g. av
340 * may contain an object scalar whose destructor gets
341 * called) so we have to unlock threads_mutex and start
342 * all over again.
343 */
533c011a 344 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 345 JOIN(t, &av);
605e5515 346 SvREFCNT_dec((SV*)av);
bf49b057 347 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 348 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 349 goto retry_cleanup;
c7848ba1 350 case THRf_R_JOINABLE:
bf49b057 351 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
352 "perl_destruct: detaching thread %p\n", t));
353 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 354 /*
c7848ba1
MB
355 * We unlock threads_mutex and t->mutex in the opposite order
356 * from which we locked them just so that DETACH won't
357 * deadlock if it panics. It's only a breach of good style
358 * not a bug since they are unlocks not locks.
359 */
533c011a 360 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB
361 DETACH(t);
362 MUTEX_UNLOCK(&t->mutex);
8023c3ce 363 goto retry_cleanup;
c7848ba1 364 default:
bf49b057 365 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
366 "perl_destruct: ignoring %p (state %u)\n",
367 t, ThrSTATE(t)));
368 MUTEX_UNLOCK(&t->mutex);
c7848ba1 369 /* fall through and out */
33f46ff6
MB
370 }
371 }
8023c3ce
MB
372 /* We leave the above "Pass 1" loop with threads_mutex still locked */
373
374 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 375 while (PL_nthreads > 1)
11343788 376 {
bf49b057 377 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 378 "perl_destruct: final wait for %d threads\n",
533c011a
NIS
379 PL_nthreads - 1));
380 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB
381 }
382 /* At this point, we're the last thread */
533c011a 383 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 384 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS
385 MUTEX_DESTROY(&PL_threads_mutex);
386 COND_DESTROY(&PL_nthreads_cond);
b57a092c 387 PL_nthreads--;
0f15f207 388#endif /* !defined(FAKE_THREADS) */
4d1ff10f 389#endif /* USE_5005THREADS */
11343788 390
3280af22 391 destruct_level = PL_perl_destruct_level;
4633a7c4
LW
392#ifdef DEBUGGING
393 {
394 char *s;
155aba94 395 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc
PP
396 int i = atoi(s);
397 if (destruct_level < i)
398 destruct_level = i;
399 }
4633a7c4
LW
400 }
401#endif
402
31d77e54
AB
403
404 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB
405 dJMPENV;
406 int x = 0;
407
408 JMPENV_PUSH(x);
409 if (PL_endav && !PL_minus_c)
410 call_list(PL_scopestack_ix, PL_endav);
411 JMPENV_POP;
26f423df 412 }
f3faeb53 413 LEAVE;
a0d0e21e
LW
414 FREETMPS;
415
ff0cee69
PP
416 /* We must account for everything. */
417
418 /* Destroy the main CV and syntax tree */
3280af22
NIS
419 if (PL_main_root) {
420 PL_curpad = AvARRAY(PL_comppad);
421 op_free(PL_main_root);
422 PL_main_root = Nullop;
a0d0e21e 423 }
3280af22
NIS
424 PL_curcop = &PL_compiling;
425 PL_main_start = Nullop;
426 SvREFCNT_dec(PL_main_cv);
427 PL_main_cv = Nullcv;
24d3c518 428 PL_dirty = TRUE;
ff0cee69 429
13621cfb
NIS
430 /* Tell PerlIO we are about to tear things apart in case
431 we have layers which are using resources that should
432 be cleaned up now.
433 */
434
435 PerlIO_destruct(aTHX);
436
3280af22 437 if (PL_sv_objcount) {
a0d0e21e
LW
438 /*
439 * Try to destruct global references. We do this first so that the
440 * destructors and destructees still exist. Some sv's might remain.
441 * Non-referenced objects are on their own.
442 */
a0d0e21e 443 sv_clean_objs();
8990e307
LW
444 }
445
5cd24f17 446 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
447 SvREFCNT_dec(PL_warnhook);
448 PL_warnhook = Nullsv;
449 SvREFCNT_dec(PL_diehook);
450 PL_diehook = Nullsv;
5cd24f17 451
4b556e6c 452 /* call exit list functions */
3280af22 453 while (PL_exitlistlen-- > 0)
acfe0abc 454 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 455
3280af22 456 Safefree(PL_exitlist);
4b556e6c 457
a0d0e21e 458 if (destruct_level == 0){
8990e307 459
a0d0e21e 460 DEBUG_P(debprofdump());
ac27b0f5 461
a0d0e21e 462 /* The exit() function will do everything that needs doing. */
31d77e54 463 return STATUS_NATIVE_EXPORT;;
a0d0e21e 464 }
5dd60ef7 465
551a8b83
JH
466 /* jettison our possibly duplicated environment */
467
468#ifdef USE_ENVIRON_ARRAY
469 if (environ != PL_origenviron) {
470 I32 i;
471
472 for (i = 0; environ[i]; i++)
4b420006 473 safesysfree(environ[i]);
0631ea03 474
4b420006
JH
475 /* Must use safesysfree() when working with environ. */
476 safesysfree(environ);
551a8b83
JH
477
478 environ = PL_origenviron;
479 }
480#endif
481
5f8cb046
DM
482#ifdef USE_ITHREADS
483 /* the syntax tree is shared between clones
484 * so op_free(PL_main_root) only ReREFCNT_dec's
485 * REGEXPs in the parent interpreter
486 * we need to manually ReREFCNT_dec for the clones
487 */
488 {
489 I32 i = AvFILLp(PL_regex_padav) + 1;
490 SV **ary = AvARRAY(PL_regex_padav);
491
492 while (i) {
35061a7e 493 SV *resv = ary[--i];
ba89bb6e 494 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM
495
496 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 497 /* this is PL_reg_curpm, already freed
35061a7e
DM
498 * flag is set in regexec.c:S_regtry
499 */
500 SvFLAGS(resv) &= ~SVf_BREAK;
1cc8b4c5
AB
501 }
502 else if(SvREPADTMP(resv)) {
503 SvREPADTMP_off(resv);
504 }
35061a7e 505 else {
5f8cb046
DM
506 ReREFCNT_dec(re);
507 }
508 }
509 }
510 SvREFCNT_dec(PL_regex_padav);
511 PL_regex_padav = Nullav;
512 PL_regex_pad = NULL;
513#endif
514
5f05dabc
PP
515 /* loosen bonds of global variables */
516
3280af22
NIS
517 if(PL_rsfp) {
518 (void)PerlIO_close(PL_rsfp);
519 PL_rsfp = Nullfp;
8ebc5c01
PP
520 }
521
522 /* Filters for program text */
3280af22
NIS
523 SvREFCNT_dec(PL_rsfp_filters);
524 PL_rsfp_filters = Nullav;
8ebc5c01
PP
525
526 /* switches */
3280af22
NIS
527 PL_preprocess = FALSE;
528 PL_minus_n = FALSE;
529 PL_minus_p = FALSE;
530 PL_minus_l = FALSE;
531 PL_minus_a = FALSE;
532 PL_minus_F = FALSE;
533 PL_doswitches = FALSE;
599cee73 534 PL_dowarn = G_WARN_OFF;
3280af22
NIS
535 PL_doextract = FALSE;
536 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
537 PL_unsafe = FALSE;
538
539 Safefree(PL_inplace);
540 PL_inplace = Nullch;
a7cb1f99 541 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
542
543 if (PL_e_script) {
544 SvREFCNT_dec(PL_e_script);
545 PL_e_script = Nullsv;
8ebc5c01
PP
546 }
547
bc0a45ed
DM
548 while (--PL_origargc >= 0) {
549 Safefree(PL_origargv[PL_origargc]);
550 }
551 Safefree(PL_origargv);
552
8ebc5c01
PP
553 /* magical thingies */
554
7889fe52
NIS
555 SvREFCNT_dec(PL_ofs_sv); /* $, */
556 PL_ofs_sv = Nullsv;
5f05dabc 557
7889fe52
NIS
558 SvREFCNT_dec(PL_ors_sv); /* $\ */
559 PL_ors_sv = Nullsv;
8ebc5c01 560
3280af22
NIS
561 SvREFCNT_dec(PL_rs); /* $/ */
562 PL_rs = Nullsv;
dc92893f 563
d33b2eba
GS
564 PL_multiline = 0; /* $* */
565 Safefree(PL_osname); /* $^O */
566 PL_osname = Nullch;
5f05dabc 567
3280af22
NIS
568 SvREFCNT_dec(PL_statname);
569 PL_statname = Nullsv;
570 PL_statgv = Nullgv;
5f05dabc 571
8ebc5c01
PP
572 /* defgv, aka *_ should be taken care of elsewhere */
573
8ebc5c01 574 /* clean up after study() */
3280af22
NIS
575 SvREFCNT_dec(PL_lastscream);
576 PL_lastscream = Nullsv;
577 Safefree(PL_screamfirst);
578 PL_screamfirst = 0;
579 Safefree(PL_screamnext);
580 PL_screamnext = 0;
8ebc5c01 581
7d5ea4e7
GS
582 /* float buffer */
583 Safefree(PL_efloatbuf);
584 PL_efloatbuf = Nullch;
585 PL_efloatsize = 0;
586
8ebc5c01 587 /* startup and shutdown function lists */
3280af22 588 SvREFCNT_dec(PL_beginav);
5a837c8f 589 SvREFCNT_dec(PL_beginav_save);
3280af22 590 SvREFCNT_dec(PL_endav);
7d30b5c4 591 SvREFCNT_dec(PL_checkav);
3280af22
NIS
592 SvREFCNT_dec(PL_initav);
593 PL_beginav = Nullav;
5a837c8f 594 PL_beginav_save = Nullav;
3280af22 595 PL_endav = Nullav;
7d30b5c4 596 PL_checkav = Nullav;
3280af22 597 PL_initav = Nullav;
5618dfe8 598
8ebc5c01 599 /* shortcuts just get cleared */
3280af22 600 PL_envgv = Nullgv;
3280af22
NIS
601 PL_incgv = Nullgv;
602 PL_hintgv = Nullgv;
603 PL_errgv = Nullgv;
604 PL_argvgv = Nullgv;
605 PL_argvoutgv = Nullgv;
606 PL_stdingv = Nullgv;
bf49b057 607 PL_stderrgv = Nullgv;
3280af22
NIS
608 PL_last_in_gv = Nullgv;
609 PL_replgv = Nullgv;
5c831c24 610 PL_debstash = Nullhv;
8ebc5c01
PP
611
612 /* reset so print() ends up where we expect */
613 setdefout(Nullgv);
5c831c24 614
7a1c5554
GS
615 SvREFCNT_dec(PL_argvout_stack);
616 PL_argvout_stack = Nullav;
8ebc5c01 617
5c831c24
GS
618 SvREFCNT_dec(PL_modglobal);
619 PL_modglobal = Nullhv;
620 SvREFCNT_dec(PL_preambleav);
621 PL_preambleav = Nullav;
622 SvREFCNT_dec(PL_subname);
623 PL_subname = Nullsv;
624 SvREFCNT_dec(PL_linestr);
625 PL_linestr = Nullsv;
626 SvREFCNT_dec(PL_pidstatus);
627 PL_pidstatus = Nullhv;
628 SvREFCNT_dec(PL_toptarget);
629 PL_toptarget = Nullsv;
630 SvREFCNT_dec(PL_bodytarget);
631 PL_bodytarget = Nullsv;
632 PL_formtarget = Nullsv;
633
d33b2eba 634 /* free locale stuff */
b9582b6a 635#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
636 Safefree(PL_collation_name);
637 PL_collation_name = Nullch;
b9582b6a 638#endif
d33b2eba 639
b9582b6a 640#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
641 Safefree(PL_numeric_name);
642 PL_numeric_name = Nullch;
a453c169 643 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 644#endif
d33b2eba 645
5c831c24
GS
646 /* clear utf8 character classes */
647 SvREFCNT_dec(PL_utf8_alnum);
648 SvREFCNT_dec(PL_utf8_alnumc);
649 SvREFCNT_dec(PL_utf8_ascii);
650 SvREFCNT_dec(PL_utf8_alpha);
651 SvREFCNT_dec(PL_utf8_space);
652 SvREFCNT_dec(PL_utf8_cntrl);
653 SvREFCNT_dec(PL_utf8_graph);
654 SvREFCNT_dec(PL_utf8_digit);
655 SvREFCNT_dec(PL_utf8_upper);
656 SvREFCNT_dec(PL_utf8_lower);
657 SvREFCNT_dec(PL_utf8_print);
658 SvREFCNT_dec(PL_utf8_punct);
659 SvREFCNT_dec(PL_utf8_xdigit);
660 SvREFCNT_dec(PL_utf8_mark);
661 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 662 SvREFCNT_dec(PL_utf8_totitle);
5c831c24
GS
663 SvREFCNT_dec(PL_utf8_tolower);
664 PL_utf8_alnum = Nullsv;
665 PL_utf8_alnumc = Nullsv;
666 PL_utf8_ascii = Nullsv;
667 PL_utf8_alpha = Nullsv;
668 PL_utf8_space = Nullsv;
669 PL_utf8_cntrl = Nullsv;
670 PL_utf8_graph = Nullsv;
671 PL_utf8_digit = Nullsv;
672 PL_utf8_upper = Nullsv;
673 PL_utf8_lower = Nullsv;
674 PL_utf8_print = Nullsv;
675 PL_utf8_punct = Nullsv;
676 PL_utf8_xdigit = Nullsv;
677 PL_utf8_mark = Nullsv;
678 PL_utf8_toupper = Nullsv;
679 PL_utf8_totitle = Nullsv;
680 PL_utf8_tolower = Nullsv;
681
971a9dd3
GS
682 if (!specialWARN(PL_compiling.cop_warnings))
683 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 684 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
685 if (!specialCopIO(PL_compiling.cop_io))
686 SvREFCNT_dec(PL_compiling.cop_io);
687 PL_compiling.cop_io = Nullsv;
f4dd75d9
GS
688#ifdef USE_ITHREADS
689 Safefree(CopFILE(&PL_compiling));
690 CopFILE(&PL_compiling) = Nullch;
691 Safefree(CopSTASHPV(&PL_compiling));
692#else
01724ea0 693 SvREFCNT_dec(CopFILEGV(&PL_compiling));
f4dd75d9
GS
694 CopFILEGV(&PL_compiling) = Nullgv;
695 /* cop_stash is not refcounted */
01724ea0 696#endif
5c831c24 697
a0d0e21e 698 /* Prepare to destruct main symbol table. */
5f05dabc 699
3280af22
NIS
700 hv = PL_defstash;
701 PL_defstash = 0;
a0d0e21e 702 SvREFCNT_dec(hv);
5c831c24
GS
703 SvREFCNT_dec(PL_curstname);
704 PL_curstname = Nullsv;
a0d0e21e 705
5a844595
GS
706 /* clear queued errors */
707 SvREFCNT_dec(PL_errors);
708 PL_errors = Nullsv;
709
a0d0e21e 710 FREETMPS;
0453d815 711 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 712 if (PL_scopestack_ix != 0)
0453d815
PM
713 Perl_warner(aTHX_ WARN_INTERNAL,
714 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
715 (long)PL_scopestack_ix);
716 if (PL_savestack_ix != 0)
0453d815
PM
717 Perl_warner(aTHX_ WARN_INTERNAL,
718 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
719 (long)PL_savestack_ix);
720 if (PL_tmps_floor != -1)
0453d815 721 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 722 (long)PL_tmps_floor + 1);
a0d0e21e 723 if (cxstack_ix != -1)
0453d815 724 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 725 (long)cxstack_ix + 1);
a0d0e21e 726 }
8990e307
LW
727
728 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 729 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 730 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
731
732 /* the 2 is for PL_fdpid and PL_strtab */
733 while (PL_sv_count > 2 && sv_clean_all())
734 ;
735
d33b2eba
GS
736 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
737 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
738 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
739 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 740
d4777f27
GS
741 AvREAL_off(PL_fdpid); /* no surviving entries */
742 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
743 PL_fdpid = Nullav;
744
6c644e78
GS
745#ifdef HAVE_INTERP_INTERN
746 sys_intern_clear();
747#endif
748
6e72f9df
PP
749 /* Destruct the global string table. */
750 {
751 /* Yell and reset the HeVAL() slots that are still holding refcounts,
752 * so that sv_free() won't fail on them.
753 */
754 I32 riter;
755 I32 max;
756 HE *hent;
757 HE **array;
758
759 riter = 0;
3280af22
NIS
760 max = HvMAX(PL_strtab);
761 array = HvARRAY(PL_strtab);
6e72f9df
PP
762 hent = array[0];
763 for (;;) {
0453d815
PM
764 if (hent && ckWARN_d(WARN_INTERNAL)) {
765 Perl_warner(aTHX_ WARN_INTERNAL,
766 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
767 HeVAL(hent) - Nullsv, HeKEY(hent));
768 HeVAL(hent) = Nullsv;
769 hent = HeNEXT(hent);
770 }
771 if (!hent) {
772 if (++riter > max)
773 break;
774 hent = array[riter];
775 }
776 }
777 }
3280af22 778 SvREFCNT_dec(PL_strtab);
6e72f9df 779
e652bb2f 780#ifdef USE_ITHREADS
a0739874
DM
781 /* free the pointer table used for cloning */
782 ptr_table_free(PL_ptr_table);
53186e96 783#endif
a0739874 784
d33b2eba
GS
785 /* free special SVs */
786
787 SvREFCNT(&PL_sv_yes) = 0;
788 sv_clear(&PL_sv_yes);
789 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 790 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
791
792 SvREFCNT(&PL_sv_no) = 0;
793 sv_clear(&PL_sv_no);
794 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 795 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS
796
797 SvREFCNT(&PL_sv_undef) = 0;
798 SvREADONLY_off(&PL_sv_undef);
d33b2eba 799
0453d815
PM
800 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
801 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 802
3280af22 803 Safefree(PL_origfilename);
3280af22 804 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ
805 if (PL_reg_curpm)
806 Safefree(PL_reg_curpm);
82ba1be6 807 Safefree(PL_reg_poscache);
3280af22
NIS
808 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
809 Safefree(PL_op_mask);
cf36064f
GS
810 Safefree(PL_psig_ptr);
811 Safefree(PL_psig_name);
2c2666fc 812 Safefree(PL_bitcount);
ce08f86c 813 Safefree(PL_psig_pend);
6e72f9df 814 nuke_stacks();
3280af22 815 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 816
a0d0e21e 817 DEBUG_P(debprofdump());
4d1ff10f 818#ifdef USE_5005THREADS
5f08fbcd 819 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS
820 MUTEX_DESTROY(&PL_sv_mutex);
821 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 822 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 823 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 824 COND_DESTROY(&PL_eval_cond);
11d617a5
GS
825#ifdef EMULATE_ATOMIC_REFCOUNTS
826 MUTEX_DESTROY(&PL_svref_mutex);
827#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 828
8023c3ce 829 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS
830 Safefree(SvPVX(PL_thrsv));
831 Safefree(SvANY(PL_thrsv));
832 Safefree(PL_thrsv);
833 PL_thrsv = Nullsv;
4d1ff10f 834#endif /* USE_5005THREADS */
d33b2eba 835
e5dd39fc
AB
836#ifdef USE_REENTRANT_API
837 Safefree(PL_reentrant_buffer->tmbuff);
838 Safefree(PL_reentrant_buffer);
839#endif
840
612f20c3
GS
841 sv_free_arenas();
842
fc36a67e
PP
843 /* As the absolutely last thing, free the non-arena SV for mess() */
844
3280af22 845 if (PL_mess_sv) {
9c63abab
GS
846 /* it could have accumulated taint magic */
847 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
848 MAGIC* mg;
849 MAGIC* moremagic;
850 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
851 moremagic = mg->mg_moremagic;
14befaf4
DM
852 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
853 && mg->mg_len >= 0)
9c63abab
GS
854 Safefree(mg->mg_ptr);
855 Safefree(mg);
856 }
857 }
fc36a67e 858 /* we know that type >= SVt_PV */
155aba94 859 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS
860 Safefree(SvPVX(PL_mess_sv));
861 Safefree(SvANY(PL_mess_sv));
862 Safefree(PL_mess_sv);
863 PL_mess_sv = Nullsv;
fc36a67e 864 }
31d77e54 865 return STATUS_NATIVE_EXPORT;
79072805
LW
866}
867
954c1994
GS
868/*
869=for apidoc perl_free
870
871Releases a Perl interpreter. See L<perlembed>.
872
873=cut
874*/
875
79072805 876void
0cb96387 877perl_free(pTHXx)
79072805 878{
acfe0abc 879#if defined(WIN32) || defined(NETWARE)
ce3e5b80 880# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
881# ifdef NETWARE
882 void *host = nw_internal_host;
883# else
884 void *host = w32_internal_host;
885# endif
886# ifndef NETWARE
887 if (PerlProc_lasthost()) {
6ea0e807 888# ifdef USE_PERLIO
ce08f86c 889 PerlIO_cleanup();
6ea0e807 890# endif
acfe0abc
GS
891 }
892# endif
ce3e5b80 893 PerlMem_free(aTHXx);
acfe0abc
GS
894# ifdef NETWARE
895 nw5_delete_internal_host(host);
896# else
897 win32_delete_internal_host(host);
898# endif
1c0ca838 899# else
6ea0e807 900# ifdef USE_PERLIO
acfe0abc 901 PerlIO_cleanup();
6ea0e807 902# endif
1c0ca838
GS
903 PerlMem_free(aTHXx);
904# endif
acfe0abc
GS
905#else
906 PerlMem_free(aTHXx);
76e3520e 907#endif
79072805
LW
908}
909
4b556e6c 910void
864dbfa3 911Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 912{
3280af22
NIS
913 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
914 PL_exitlist[PL_exitlistlen].fn = fn;
915 PL_exitlist[PL_exitlistlen].ptr = ptr;
916 ++PL_exitlistlen;
4b556e6c
JD
917}
918
954c1994
GS
919/*
920=for apidoc perl_parse
921
922Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
923
924=cut
925*/
926
79072805 927int
0cb96387 928perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 929{
6224f72b 930 I32 oldscope;
6224f72b 931 int ret;
db36c5a1 932 dJMPENV;
4d1ff10f 933#ifdef USE_5005THREADS
cea2e8a9
GS
934 dTHX;
935#endif
8d063cd8 936
a687059c
LW
937#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
938#ifdef IAMSUID
939#undef IAMSUID
cea2e8a9 940 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW
941setuid perl scripts securely.\n");
942#endif
943#endif
944
3280af22 945 PL_origargc = argc;
bc0a45ed
DM
946 {
947 /* we copy rather than point to argv
948 * since perl_clone will copy and perl_destruct
949 * has no way of knowing if we've made a copy or
950 * just point to argv
951 */
952 int i = PL_origargc;
953 New(0, PL_origargv, i+1, char*);
954 PL_origargv[i] = '\0';
955 while (i-- > 0) {
956 PL_origargv[i] = savepv(argv[i]);
957 }
958 }
959
0631ea03 960
a0d0e21e 961
3280af22 962 if (PL_do_undump) {
a0d0e21e
LW
963
964 /* Come here if running an undumped a.out. */
965
3280af22
NIS
966 PL_origfilename = savepv(argv[0]);
967 PL_do_undump = FALSE;
a0d0e21e 968 cxstack_ix = -1; /* start label stack again */
748a9306 969 init_ids();
a0d0e21e
LW
970 init_postdump_symbols(argc,argv,env);
971 return 0;
972 }
973
3280af22
NIS
974 if (PL_main_root) {
975 PL_curpad = AvARRAY(PL_comppad);
976 op_free(PL_main_root);
977 PL_main_root = Nullop;
ff0cee69 978 }
3280af22
NIS
979 PL_main_start = Nullop;
980 SvREFCNT_dec(PL_main_cv);
981 PL_main_cv = Nullcv;
79072805 982
3280af22
NIS
983 time(&PL_basetime);
984 oldscope = PL_scopestack_ix;
599cee73 985 PL_dowarn = G_WARN_OFF;
f86702cc 986
14dd3ad8
GS
987#ifdef PERL_FLEXIBLE_EXCEPTIONS
988 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
989#else
990 JMPENV_PUSH(ret);
991#endif
6224f72b 992 switch (ret) {
312caa8e 993 case 0:
14dd3ad8
GS
994#ifndef PERL_FLEXIBLE_EXCEPTIONS
995 parse_body(env,xsinit);
996#endif
7d30b5c4
GS
997 if (PL_checkav)
998 call_list(oldscope, PL_checkav);
14dd3ad8
GS
999 ret = 0;
1000 break;
6224f72b
GS
1001 case 1:
1002 STATUS_ALL_FAILURE;
1003 /* FALL THROUGH */
1004 case 2:
1005 /* my_exit() was called */
3280af22 1006 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1007 LEAVE;
1008 FREETMPS;
3280af22 1009 PL_curstash = PL_defstash;
7d30b5c4
GS
1010 if (PL_checkav)
1011 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1012 ret = STATUS_NATIVE_EXPORT;
1013 break;
6224f72b 1014 case 3:
bf49b057 1015 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1016 ret = 1;
1017 break;
6224f72b 1018 }
14dd3ad8
GS
1019 JMPENV_POP;
1020 return ret;
1021}
1022
1023#ifdef PERL_FLEXIBLE_EXCEPTIONS
1024STATIC void *
1025S_vparse_body(pTHX_ va_list args)
1026{
1027 char **env = va_arg(args, char**);
1028 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1029
1030 return parse_body(env, xsinit);
312caa8e 1031}
14dd3ad8 1032#endif
312caa8e
CS
1033
1034STATIC void *
14dd3ad8 1035S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1036{
312caa8e
CS
1037 int argc = PL_origargc;
1038 char **argv = PL_origargv;
312caa8e
CS
1039 char *scriptname = NULL;
1040 int fdscript = -1;
1041 VOL bool dosearch = FALSE;
1042 char *validarg = "";
1043 AV* comppadlist;
1044 register SV *sv;
1045 register char *s;
cf756827 1046 char *cddir = Nullch;
312caa8e 1047
3280af22 1048 sv_setpvn(PL_linestr,"",0);
79cb57f6 1049 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1050 SAVEFREESV(sv);
1051 init_main_stash();
54310121 1052
6224f72b
GS
1053 for (argc--,argv++; argc > 0; argc--,argv++) {
1054 if (argv[0][0] != '-' || !argv[0][1])
1055 break;
1056#ifdef DOSUID
1057 if (*validarg)
1058 validarg = " PHOOEY ";
1059 else
1060 validarg = argv[0];
13281fa4 1061#endif
6224f72b
GS
1062 s = argv[0]+1;
1063 reswitch:
1064 switch (*s) {
729a02f2
GS
1065 case 'C':
1066#ifdef WIN32
c0932edc 1067 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS
1068 /* FALL THROUGH */
1069#endif
1d5472a9
GS
1070#ifndef PERL_STRICT_CR
1071 case '\r':
1072#endif
6224f72b
GS
1073 case ' ':
1074 case '0':
1075 case 'F':
1076 case 'a':
1077 case 'c':
1078 case 'd':
1079 case 'D':
1080 case 'h':
1081 case 'i':
1082 case 'l':
1083 case 'M':
1084 case 'm':
1085 case 'n':
1086 case 'p':
1087 case 's':
1088 case 'u':
1089 case 'U':
1090 case 'v':
599cee73
PM
1091 case 'W':
1092 case 'X':
6224f72b 1093 case 'w':
155aba94 1094 if ((s = moreswitches(s)))
6224f72b
GS
1095 goto reswitch;
1096 break;
33b78306 1097
6224f72b 1098 case 'T':
3280af22 1099 PL_tainting = TRUE;
6224f72b
GS
1100 s++;
1101 goto reswitch;
f86702cc 1102
6224f72b 1103 case 'e':
bf4acbe4
GS
1104#ifdef MACOS_TRADITIONAL
1105 /* ignore -e for Dev:Pseudo argument */
1106 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1107 break;
bf4acbe4 1108#endif
3280af22 1109 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1110 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1111 if (!PL_e_script) {
79cb57f6 1112 PL_e_script = newSVpvn("",0);
0cb96387 1113 filter_add(read_e_script, NULL);
6224f72b
GS
1114 }
1115 if (*++s)
3280af22 1116 sv_catpv(PL_e_script, s);
6224f72b 1117 else if (argv[1]) {
3280af22 1118 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1119 argc--,argv++;
1120 }
1121 else
cea2e8a9 1122 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1123 sv_catpv(PL_e_script, "\n");
6224f72b 1124 break;
afe37c7d 1125
6224f72b
GS
1126 case 'I': /* -I handled both here and in moreswitches() */
1127 forbid_setid("-I");
1128 if (!*++s && (s=argv[1]) != Nullch) {
1129 argc--,argv++;
1130 }
6224f72b 1131 if (s && *s) {
0df16ed7
GS
1132 char *p;
1133 STRLEN len = strlen(s);
1134 p = savepvn(s, len);
9c8a64f0 1135 incpush(p, TRUE, TRUE);
0df16ed7
GS
1136 sv_catpvn(sv, "-I", 2);
1137 sv_catpvn(sv, p, len);
1138 sv_catpvn(sv, " ", 1);
6224f72b 1139 Safefree(p);
0df16ed7
GS
1140 }
1141 else
a67e862a 1142 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1143 break;
1144 case 'P':
1145 forbid_setid("-P");
3280af22 1146 PL_preprocess = TRUE;
6224f72b
GS
1147 s++;
1148 goto reswitch;
1149 case 'S':
1150 forbid_setid("-S");
1151 dosearch = TRUE;
1152 s++;
1153 goto reswitch;
1154 case 'V':
3280af22
NIS
1155 if (!PL_preambleav)
1156 PL_preambleav = newAV();
1157 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1158 if (*++s != ':') {
3280af22 1159 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1160#ifdef VMS
6b88bc9c 1161 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1162#else
3280af22 1163 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1164#endif
3280af22 1165 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1166# ifdef DEBUGGING
3280af22 1167 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1168# endif
6224f72b 1169# ifdef MULTIPLICITY
8f872242 1170 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1171# endif
4d1ff10f
AB
1172# ifdef USE_5005THREADS
1173 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1174# endif
ac5e8965
JH
1175# ifdef USE_ITHREADS
1176 sv_catpv(PL_Sv," USE_ITHREADS");
1177# endif
10cc9d2a
JH
1178# ifdef USE_64_BIT_INT
1179 sv_catpv(PL_Sv," USE_64_BIT_INT");
1180# endif
1181# ifdef USE_64_BIT_ALL
1182 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1183# endif
1184# ifdef USE_LONG_DOUBLE
1185 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1186# endif
53430762
JH
1187# ifdef USE_LARGE_FILES
1188 sv_catpv(PL_Sv," USE_LARGE_FILES");
1189# endif
ac5e8965
JH
1190# ifdef USE_SOCKS
1191 sv_catpv(PL_Sv," USE_SOCKS");
1192# endif
b363f7ed
GS
1193# ifdef PERL_IMPLICIT_CONTEXT
1194 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1195# endif
1196# ifdef PERL_IMPLICIT_SYS
1197 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1198# endif
3280af22 1199 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1200
6224f72b
GS
1201#if defined(LOCAL_PATCH_COUNT)
1202 if (LOCAL_PATCH_COUNT > 0) {
1203 int i;
3280af22 1204 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1205 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1206 if (PL_localpatches[i])
cea2e8a9 1207 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS
1208 }
1209 }
1210#endif
cea2e8a9 1211 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1212#ifdef __DATE__
1213# ifdef __TIME__
cea2e8a9 1214 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1215# else
cea2e8a9 1216 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1217# endif
1218#endif
3280af22 1219 sv_catpv(PL_Sv, "; \
6224f72b 1220$\"=\"\\n \"; \
69fcd688
JH
1221@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1222#ifdef __CYGWIN__
1223 sv_catpv(PL_Sv,"\
1224push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1225#endif
1226 sv_catpv(PL_Sv, "\
6224f72b
GS
1227print \" \\%ENV:\\n @env\\n\" if @env; \
1228print \" \\@INC:\\n @INC\\n\";");
1229 }
1230 else {
3280af22
NIS
1231 PL_Sv = newSVpv("config_vars(qw(",0);
1232 sv_catpv(PL_Sv, ++s);
1233 sv_catpv(PL_Sv, "))");
6224f72b
GS
1234 s += strlen(s);
1235 }
3280af22 1236 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1237 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1238 goto reswitch;
1239 case 'x':
3280af22 1240 PL_doextract = TRUE;
6224f72b
GS
1241 s++;
1242 if (*s)
f4c556ac 1243 cddir = s;
6224f72b
GS
1244 break;
1245 case 0:
1246 break;
1247 case '-':
1248 if (!*++s || isSPACE(*s)) {
1249 argc--,argv++;
1250 goto switch_end;
1251 }
1252 /* catch use of gnu style long options */
1253 if (strEQ(s, "version")) {
1254 s = "v";
1255 goto reswitch;
1256 }
1257 if (strEQ(s, "help")) {
1258 s = "h";
1259 goto reswitch;
1260 }
1261 s--;
1262 /* FALL THROUGH */
1263 default:
cea2e8a9 1264 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1265 }
1266 }
6224f72b 1267 switch_end:
54310121 1268
f675dbe5
CB
1269 if (
1270#ifndef SECURE_INTERNAL_GETENV
1271 !PL_tainting &&
1272#endif
cf756827 1273 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1274 {
cf756827 1275 char *popt = s;
74288ac8
GS
1276 while (isSPACE(*s))
1277 s++;
1278 if (*s == '-' && *(s+1) == 'T')
1279 PL_tainting = TRUE;
1280 else {
cf756827 1281 char *popt_copy = Nullch;
74288ac8 1282 while (s && *s) {
4ea8f8fb 1283 char *d;
74288ac8
GS
1284 while (isSPACE(*s))
1285 s++;
1286 if (*s == '-') {
1287 s++;
1288 if (isSPACE(*s))
1289 continue;
1290 }
4ea8f8fb 1291 d = s;
74288ac8
GS
1292 if (!*s)
1293 break;
1294 if (!strchr("DIMUdmw", *s))
cea2e8a9 1295 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1296 while (++s && *s) {
1297 if (isSPACE(*s)) {
cf756827
GS
1298 if (!popt_copy) {
1299 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1300 s = popt_copy + (s - popt);
1301 d = popt_copy + (d - popt);
1302 }
4ea8f8fb
MS
1303 *s++ = '\0';
1304 break;
1305 }
1306 }
1307 moreswitches(d);
6224f72b 1308 }
6224f72b
GS
1309 }
1310 }
a0d0e21e 1311
6224f72b
GS
1312 if (!scriptname)
1313 scriptname = argv[0];
3280af22 1314 if (PL_e_script) {
6224f72b
GS
1315 argc++,argv--;
1316 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1317 }
1318 else if (scriptname == Nullch) {
1319#ifdef MSDOS
1320 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1321 moreswitches("h");
1322#endif
1323 scriptname = "-";
1324 }
1325
1326 init_perllib();
1327
1328 open_script(scriptname,dosearch,sv,&fdscript);
1329
1330 validate_suid(validarg, scriptname,fdscript);
1331
64ca3a65 1332#ifndef PERL_MICRO
0b5b802d
GS
1333#if defined(SIGCHLD) || defined(SIGCLD)
1334 {
1335#ifndef SIGCHLD
1336# define SIGCHLD SIGCLD
1337#endif
1338 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1339 if (sigstate == SIG_IGN) {
1340 if (ckWARN(WARN_SIGNAL))
1341 Perl_warner(aTHX_ WARN_SIGNAL,
1342 "Can't ignore signal CHLD, forcing to default");
1343 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1344 }
1345 }
1346#endif
64ca3a65 1347#endif
0b5b802d 1348
bf4acbe4
GS
1349#ifdef MACOS_TRADITIONAL
1350 if (PL_doextract || gMacPerl_AlwaysExtract) {
1351#else
f4c556ac 1352 if (PL_doextract) {
bf4acbe4 1353#endif
6224f72b 1354 find_beginning();
f4c556ac
GS
1355 if (cddir && PerlDir_chdir(cddir) < 0)
1356 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1357
1358 }
6224f72b 1359
3280af22
NIS
1360 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1361 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1362 CvUNIQUE_on(PL_compcv);
1363
1364 PL_comppad = newAV();
1365 av_push(PL_comppad, Nullsv);
1366 PL_curpad = AvARRAY(PL_comppad);
1367 PL_comppad_name = newAV();
1368 PL_comppad_name_fill = 0;
1369 PL_min_intro_pending = 0;
1370 PL_padix = 0;
4d1ff10f 1371#ifdef USE_5005THREADS
79cb57f6 1372 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS
1373 PL_curpad[0] = (SV*)newAV();
1374 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1375 CvOWNER(PL_compcv) = 0;
1376 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1377 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1378#endif /* USE_5005THREADS */
6224f72b
GS
1379
1380 comppadlist = newAV();
1381 AvREAL_off(comppadlist);
3280af22
NIS
1382 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1383 av_store(comppadlist, 1, (SV*)PL_comppad);
1384 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1385
0c4f7ff0 1386 boot_core_PerlIO();
6224f72b 1387 boot_core_UNIVERSAL();
9a34ef1d 1388#ifndef PERL_MICRO
09bef843 1389 boot_core_xsutils();
9a34ef1d 1390#endif
6224f72b
GS
1391
1392 if (xsinit)
acfe0abc 1393 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1394#ifndef PERL_MICRO
ed79a026 1395#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1396 init_os_extras();
6224f72b 1397#endif
64ca3a65 1398#endif
6224f72b 1399
29209bc5 1400#ifdef USE_SOCKS
1b9c9cf5
DH
1401# ifdef HAS_SOCKS5_INIT
1402 socks5_init(argv[0]);
1403# else
29209bc5 1404 SOCKSinit(argv[0]);
1b9c9cf5 1405# endif
ac27b0f5 1406#endif
29209bc5 1407
6224f72b
GS
1408 init_predump_symbols();
1409 /* init_postdump_symbols not currently designed to be called */
1410 /* more than once (ENV isn't cleared first, for example) */
1411 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1412 if (!PL_do_undump)
6224f72b
GS
1413 init_postdump_symbols(argc,argv,env);
1414
1415 init_lexer();
1416
1417 /* now parse the script */
1418
91487cfc 1419 SETERRNO(0,SS$_NORMAL);
3280af22 1420 PL_error_count = 0;
bf4acbe4
GS
1421#ifdef MACOS_TRADITIONAL
1422 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1423 if (PL_minus_c)
1424 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1425 else {
1426 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1427 MacPerl_MPWFileName(PL_origfilename));
1428 }
1429 }
1430#else
3280af22
NIS
1431 if (yyparse() || PL_error_count) {
1432 if (PL_minus_c)
cea2e8a9 1433 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1434 else {
cea2e8a9 1435 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1436 PL_origfilename);
6224f72b
GS
1437 }
1438 }
bf4acbe4 1439#endif
57843af0 1440 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1441 PL_curstash = PL_defstash;
1442 PL_preprocess = FALSE;
1443 if (PL_e_script) {
1444 SvREFCNT_dec(PL_e_script);
1445 PL_e_script = Nullsv;
6224f72b
GS
1446 }
1447
8bfdd7d9
HS
1448/*
1449 Not sure that this is still the right place to do this now that we
1450 no longer use PL_nrs. HVDS 2001/09/09
1451*/
864dbfa3 1452 sv_setsv(get_sv("/", TRUE), PL_rs);
8bfdd7d9 1453
3280af22 1454 if (PL_do_undump)
6224f72b
GS
1455 my_unexec();
1456
57843af0
GS
1457 if (isWARN_ONCE) {
1458 SAVECOPFILE(PL_curcop);
1459 SAVECOPLINE(PL_curcop);
3280af22 1460 gv_check(PL_defstash);
57843af0 1461 }
6224f72b
GS
1462
1463 LEAVE;
1464 FREETMPS;
1465
1466#ifdef MYMALLOC
1467 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1468 dump_mstats("after compilation:");
1469#endif
1470
1471 ENTER;
3280af22 1472 PL_restartop = 0;
312caa8e 1473 return NULL;
6224f72b
GS
1474}
1475
954c1994
GS
1476/*
1477=for apidoc perl_run
1478
1479Tells a Perl interpreter to run. See L<perlembed>.
1480
1481=cut
1482*/
1483
6224f72b 1484int
0cb96387 1485perl_run(pTHXx)
6224f72b 1486{
6224f72b 1487 I32 oldscope;
14dd3ad8 1488 int ret = 0;
db36c5a1 1489 dJMPENV;
4d1ff10f 1490#ifdef USE_5005THREADS
cea2e8a9
GS
1491 dTHX;
1492#endif
6224f72b 1493
3280af22 1494 oldscope = PL_scopestack_ix;
96e176bf
CL
1495#ifdef VMS
1496 VMSISH_HUSHED = 0;
1497#endif
6224f72b 1498
14dd3ad8 1499#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1500 redo_body:
14dd3ad8
GS
1501 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1502#else
1503 JMPENV_PUSH(ret);
1504#endif
6224f72b
GS
1505 switch (ret) {
1506 case 1:
1507 cxstack_ix = -1; /* start context stack again */
312caa8e 1508 goto redo_body;
14dd3ad8
GS
1509 case 0: /* normal completion */
1510#ifndef PERL_FLEXIBLE_EXCEPTIONS
1511 redo_body:
1512 run_body(oldscope);
1513#endif
1514 /* FALL THROUGH */
1515 case 2: /* my_exit() */
3280af22 1516 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1517 LEAVE;
1518 FREETMPS;
3280af22 1519 PL_curstash = PL_defstash;
31d77e54
AB
1520 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
1521 PL_endav && !PL_minus_c)
1522 call_list(oldscope, PL_endav);
6224f72b
GS
1523#ifdef MYMALLOC
1524 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1525 dump_mstats("after execution: ");
1526#endif
14dd3ad8
GS
1527 ret = STATUS_NATIVE_EXPORT;
1528 break;
6224f72b 1529 case 3:
312caa8e
CS
1530 if (PL_restartop) {
1531 POPSTACK_TO(PL_mainstack);
1532 goto redo_body;
6224f72b 1533 }
bf49b057 1534 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1535 FREETMPS;
14dd3ad8
GS
1536 ret = 1;
1537 break;
6224f72b
GS
1538 }
1539
14dd3ad8
GS
1540 JMPENV_POP;
1541 return ret;
312caa8e
CS
1542}
1543
14dd3ad8 1544#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1545STATIC void *
14dd3ad8 1546S_vrun_body(pTHX_ va_list args)
312caa8e 1547{
312caa8e
CS
1548 I32 oldscope = va_arg(args, I32);
1549
14dd3ad8
GS
1550 return run_body(oldscope);
1551}
1552#endif
1553
1554
1555STATIC void *
1556S_run_body(pTHX_ I32 oldscope)
1557{
6224f72b 1558 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1559 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1560
3280af22 1561 if (!PL_restartop) {
6224f72b
GS
1562 DEBUG_x(dump_all());
1563 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1564 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1565 PTR2UV(thr)));
6224f72b 1566
3280af22 1567 if (PL_minus_c) {
bf4acbe4 1568#ifdef MACOS_TRADITIONAL
be708cc0 1569 PerlIO_printf(Perl_error_log, "# %s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1570#else
bf49b057 1571 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1572#endif
6224f72b
GS
1573 my_exit(0);
1574 }
3280af22 1575 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1576 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1577 if (PL_initav)
1578 call_list(oldscope, PL_initav);
6224f72b
GS
1579 }
1580
1581 /* do it */
1582
3280af22 1583 if (PL_restartop) {
533c011a 1584 PL_op = PL_restartop;
3280af22 1585 PL_restartop = 0;
cea2e8a9 1586 CALLRUNOPS(aTHX);
6224f72b 1587 }
3280af22
NIS
1588 else if (PL_main_start) {
1589 CvDEPTH(PL_main_cv) = 1;
533c011a 1590 PL_op = PL_main_start;
cea2e8a9 1591 CALLRUNOPS(aTHX);
6224f72b
GS
1592 }
1593
f6b3007c
JH
1594 my_exit(0);
1595 /* NOTREACHED */
312caa8e 1596 return NULL;
6224f72b
GS
1597}
1598
954c1994
GS
1599/*
1600=for apidoc p||get_sv
1601
1602Returns the SV of the specified Perl scalar. If C<create> is set and the
1603Perl variable does not exist then it will be created. If C<create> is not
1604set and the variable does not exist then NULL is returned.
1605
1606=cut
1607*/
1608
6224f72b 1609SV*
864dbfa3 1610Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1611{
1612 GV *gv;
4d1ff10f 1613#ifdef USE_5005THREADS
6224f72b
GS
1614 if (name[1] == '\0' && !isALPHA(name[0])) {
1615 PADOFFSET tmp = find_threadsv(name);
411caa50 1616 if (tmp != NOT_IN_PAD)
6224f72b 1617 return THREADSV(tmp);
6224f72b 1618 }
4d1ff10f 1619#endif /* USE_5005THREADS */
6224f72b
GS
1620 gv = gv_fetchpv(name, create, SVt_PV);
1621 if (gv)
1622 return GvSV(gv);
1623 return Nullsv;
1624}
1625
954c1994
GS
1626/*
1627=for apidoc p||get_av
1628
1629Returns the AV of the specified Perl array. If C<create> is set and the
1630Perl variable does not exist then it will be created. If C<create> is not
1631set and the variable does not exist then NULL is returned.
1632
1633=cut
1634*/
1635
6224f72b 1636AV*
864dbfa3 1637Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1638{
1639 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1640 if (create)
1641 return GvAVn(gv);
1642 if (gv)
1643 return GvAV(gv);
1644 return Nullav;
1645}
1646
954c1994
GS
1647/*
1648=for apidoc p||get_hv
1649
1650Returns the HV of the specified Perl hash. If C<create> is set and the
1651Perl variable does not exist then it will be created. If C<create> is not
1652set and the variable does not exist then NULL is returned.
1653
1654=cut
1655*/
1656
6224f72b 1657HV*
864dbfa3 1658Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1659{
a0d0e21e
LW
1660 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1661 if (create)
1662 return GvHVn(gv);
1663 if (gv)
1664 return GvHV(gv);
1665 return Nullhv;
1666}
1667
954c1994
GS
1668/*
1669=for apidoc p||get_cv
1670
1671Returns the CV of the specified Perl subroutine. If C<create> is set and
1672the Perl subroutine does not exist then it will be declared (which has the
1673same effect as saying C<sub name;>). If C<create> is not set and the
1674subroutine does not exist then NULL is returned.
1675
1676=cut
1677*/
1678
a0d0e21e 1679CV*
864dbfa3 1680Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
1681{
1682 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1683 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
1684 /* XXX this is probably not what they think they're getting.
1685 * It has the same effect as "sub name;", i.e. just a forward
1686 * declaration! */
8ebc5c01 1687 if (create && !GvCVu(gv))
774d564b 1688 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1689 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1690 Nullop,
a0d0e21e
LW
1691 Nullop);
1692 if (gv)
8ebc5c01 1693 return GvCVu(gv);
a0d0e21e
LW
1694 return Nullcv;
1695}
1696
79072805
LW
1697/* Be sure to refetch the stack pointer after calling these routines. */
1698
954c1994
GS
1699/*
1700=for apidoc p||call_argv
1701
1702Performs a callback to the specified Perl sub. See L<perlcall>.
1703
1704=cut
1705*/
1706
a0d0e21e 1707I32
864dbfa3 1708Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1709
8ac85365
NIS
1710 /* See G_* flags in cop.h */
1711 /* null terminated arg list */
8990e307 1712{
a0d0e21e 1713 dSP;
8990e307 1714
924508f0 1715 PUSHMARK(SP);
a0d0e21e 1716 if (argv) {
8990e307 1717 while (*argv) {
a0d0e21e 1718 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
1719 argv++;
1720 }
a0d0e21e 1721 PUTBACK;
8990e307 1722 }
864dbfa3 1723 return call_pv(sub_name, flags);
8990e307
LW
1724}
1725
954c1994
GS
1726/*
1727=for apidoc p||call_pv
1728
1729Performs a callback to the specified Perl sub. See L<perlcall>.
1730
1731=cut
1732*/
1733
a0d0e21e 1734I32
864dbfa3 1735Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
1736 /* name of the subroutine */
1737 /* See G_* flags in cop.h */
a0d0e21e 1738{
864dbfa3 1739 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
1740}
1741
954c1994
GS
1742/*
1743=for apidoc p||call_method
1744
1745Performs a callback to the specified Perl method. The blessed object must
1746be on the stack. See L<perlcall>.
1747
1748=cut
1749*/
1750
a0d0e21e 1751I32
864dbfa3 1752Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
1753 /* name of the subroutine */
1754 /* See G_* flags in cop.h */
a0d0e21e 1755{
968b3946 1756 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
1757}
1758
1759/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
1760/*
1761=for apidoc p||call_sv
1762
1763Performs a callback to the Perl sub whose name is in the SV. See
1764L<perlcall>.
1765
1766=cut
1767*/
1768
a0d0e21e 1769I32
864dbfa3 1770Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1771 /* See G_* flags in cop.h */
a0d0e21e 1772{
924508f0 1773 dSP;
a0d0e21e 1774 LOGOP myop; /* fake syntax tree node */
968b3946 1775 UNOP method_op;
aa689395 1776 I32 oldmark;
13689cfe 1777 volatile I32 retval = 0;
a0d0e21e 1778 I32 oldscope;
54310121 1779 bool oldcatch = CATCH_GET;
6224f72b 1780 int ret;
533c011a 1781 OP* oldop = PL_op;
db36c5a1 1782 dJMPENV;
1e422769 1783
a0d0e21e
LW
1784 if (flags & G_DISCARD) {
1785 ENTER;
1786 SAVETMPS;
1787 }
1788
aa689395 1789 Zero(&myop, 1, LOGOP);
54310121 1790 myop.op_next = Nullop;
f51d4af5 1791 if (!(flags & G_NOARGS))
aa689395 1792 myop.op_flags |= OPf_STACKED;
54310121
PP
1793 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1794 (flags & G_ARRAY) ? OPf_WANT_LIST :
1795 OPf_WANT_SCALAR);
462e5cf6 1796 SAVEOP();
533c011a 1797 PL_op = (OP*)&myop;
aa689395 1798
3280af22
NIS
1799 EXTEND(PL_stack_sp, 1);
1800 *++PL_stack_sp = sv;
aa689395 1801 oldmark = TOPMARK;
3280af22 1802 oldscope = PL_scopestack_ix;
a0d0e21e 1803
3280af22 1804 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1805 /* Handle first BEGIN of -d. */
3280af22 1806 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
1807 /* Try harder, since this may have been a sighandler, thus
1808 * curstash may be meaningless. */
3280af22 1809 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1810 && !(flags & G_NODEBUG))
533c011a 1811 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1812
968b3946
GS
1813 if (flags & G_METHOD) {
1814 Zero(&method_op, 1, UNOP);
1815 method_op.op_next = PL_op;
1816 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1817 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1818 PL_op = (OP*)&method_op;
968b3946
GS
1819 }
1820
312caa8e 1821 if (!(flags & G_EVAL)) {
0cdb2077 1822 CATCH_SET(TRUE);
14dd3ad8 1823 call_body((OP*)&myop, FALSE);
312caa8e 1824 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1825 CATCH_SET(oldcatch);
312caa8e
CS
1826 }
1827 else {
d78bda3d 1828 myop.op_other = (OP*)&myop;
3280af22 1829 PL_markstack_ptr--;
4633a7c4
LW
1830 /* we're trying to emulate pp_entertry() here */
1831 {
c09156bb 1832 register PERL_CONTEXT *cx;
54310121 1833 I32 gimme = GIMME_V;
ac27b0f5 1834
4633a7c4
LW
1835 ENTER;
1836 SAVETMPS;
ac27b0f5 1837
968b3946 1838 push_return(Nullop);
1d76a5c3 1839 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1840 PUSHEVAL(cx, 0, 0);
533c011a 1841 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1842
faef0170 1843 PL_in_eval = EVAL_INEVAL;
4633a7c4 1844 if (flags & G_KEEPERR)
faef0170 1845 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1846 else
38a03e6e 1847 sv_setpv(ERRSV,"");
4633a7c4 1848 }
3280af22 1849 PL_markstack_ptr++;
a0d0e21e 1850
14dd3ad8
GS
1851#ifdef PERL_FLEXIBLE_EXCEPTIONS
1852 redo_body:
1853 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1854 (OP*)&myop, FALSE);
14dd3ad8
GS
1855#else
1856 JMPENV_PUSH(ret);
1857#endif
6224f72b
GS
1858 switch (ret) {
1859 case 0:
14dd3ad8
GS
1860#ifndef PERL_FLEXIBLE_EXCEPTIONS
1861 redo_body:
1862 call_body((OP*)&myop, FALSE);
1863#endif
312caa8e
CS
1864 retval = PL_stack_sp - (PL_stack_base + oldmark);
1865 if (!(flags & G_KEEPERR))
1866 sv_setpv(ERRSV,"");
a0d0e21e 1867 break;
6224f72b 1868 case 1:
f86702cc 1869 STATUS_ALL_FAILURE;
a0d0e21e 1870 /* FALL THROUGH */
6224f72b 1871 case 2:
a0d0e21e 1872 /* my_exit() was called */
3280af22 1873 PL_curstash = PL_defstash;
a0d0e21e 1874 FREETMPS;
14dd3ad8 1875 JMPENV_POP;
cc3604b1 1876 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1877 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1878 my_exit_jump();
a0d0e21e 1879 /* NOTREACHED */
6224f72b 1880 case 3:
3280af22 1881 if (PL_restartop) {
533c011a 1882 PL_op = PL_restartop;
3280af22 1883 PL_restartop = 0;
312caa8e 1884 goto redo_body;
a0d0e21e 1885 }
3280af22 1886 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1887 if (flags & G_ARRAY)
1888 retval = 0;
1889 else {
1890 retval = 1;
3280af22 1891 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1892 }
312caa8e 1893 break;
a0d0e21e 1894 }
a0d0e21e 1895
3280af22 1896 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
1897 SV **newsp;
1898 PMOP *newpm;
1899 I32 gimme;
c09156bb 1900 register PERL_CONTEXT *cx;
a0a2876f
LW
1901 I32 optype;
1902
1903 POPBLOCK(cx,newpm);
1904 POPEVAL(cx);
1905 pop_return();
3280af22 1906 PL_curpm = newpm;
a0a2876f 1907 LEAVE;
a0d0e21e 1908 }
14dd3ad8 1909 JMPENV_POP;
a0d0e21e 1910 }
1e422769 1911
a0d0e21e 1912 if (flags & G_DISCARD) {
3280af22 1913 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1914 retval = 0;
1915 FREETMPS;
1916 LEAVE;
1917 }
533c011a 1918 PL_op = oldop;
a0d0e21e
LW
1919 return retval;
1920}
1921
14dd3ad8 1922#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1923STATIC void *
14dd3ad8 1924S_vcall_body(pTHX_ va_list args)
312caa8e
CS
1925{
1926 OP *myop = va_arg(args, OP*);
1927 int is_eval = va_arg(args, int);
1928
14dd3ad8 1929 call_body(myop, is_eval);
312caa8e
CS
1930 return NULL;
1931}
14dd3ad8 1932#endif
312caa8e
CS
1933
1934STATIC void
14dd3ad8 1935S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1936{
312caa8e
CS
1937 if (PL_op == myop) {
1938 if (is_eval)
f807eda9 1939 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1940 else
f807eda9 1941 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
1942 }
1943 if (PL_op)
cea2e8a9 1944 CALLRUNOPS(aTHX);
312caa8e
CS
1945}
1946
6e72f9df 1947/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1948
954c1994
GS
1949/*
1950=for apidoc p||eval_sv
1951
1952Tells Perl to C<eval> the string in the SV.
1953
1954=cut
1955*/
1956
a0d0e21e 1957I32
864dbfa3 1958Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1959
8ac85365 1960 /* See G_* flags in cop.h */
a0d0e21e 1961{
924508f0 1962 dSP;
a0d0e21e 1963 UNOP myop; /* fake syntax tree node */
8fa7f367 1964 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1965 volatile I32 retval = 0;
4633a7c4 1966 I32 oldscope;
6224f72b 1967 int ret;
533c011a 1968 OP* oldop = PL_op;
db36c5a1 1969 dJMPENV;
84902520 1970
4633a7c4
LW
1971 if (flags & G_DISCARD) {
1972 ENTER;
1973 SAVETMPS;
1974 }
1975
462e5cf6 1976 SAVEOP();
533c011a
NIS
1977 PL_op = (OP*)&myop;
1978 Zero(PL_op, 1, UNOP);
3280af22
NIS
1979 EXTEND(PL_stack_sp, 1);
1980 *++PL_stack_sp = sv;
1981 oldscope = PL_scopestack_ix;
79072805 1982
4633a7c4
LW
1983 if (!(flags & G_NOARGS))
1984 myop.op_flags = OPf_STACKED;
79072805 1985 myop.op_next = Nullop;
6e72f9df 1986 myop.op_type = OP_ENTEREVAL;
54310121
PP
1987 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1988 (flags & G_ARRAY) ? OPf_WANT_LIST :
1989 OPf_WANT_SCALAR);
6e72f9df
PP
1990 if (flags & G_KEEPERR)
1991 myop.op_flags |= OPf_SPECIAL;
4633a7c4 1992
14dd3ad8 1993#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1994 redo_body:
14dd3ad8 1995 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1996 (OP*)&myop, TRUE);
14dd3ad8
GS
1997#else
1998 JMPENV_PUSH(ret);
1999#endif
6224f72b
GS
2000 switch (ret) {
2001 case 0:
14dd3ad8
GS
2002#ifndef PERL_FLEXIBLE_EXCEPTIONS
2003 redo_body:
2004 call_body((OP*)&myop,TRUE);
2005#endif
312caa8e
CS
2006 retval = PL_stack_sp - (PL_stack_base + oldmark);
2007 if (!(flags & G_KEEPERR))
2008 sv_setpv(ERRSV,"");
4633a7c4 2009 break;
6224f72b 2010 case 1:
f86702cc 2011 STATUS_ALL_FAILURE;
4633a7c4 2012 /* FALL THROUGH */
6224f72b 2013 case 2:
4633a7c4 2014 /* my_exit() was called */
3280af22 2015 PL_curstash = PL_defstash;
4633a7c4 2016 FREETMPS;
14dd3ad8 2017 JMPENV_POP;
cc3604b1 2018 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2019 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2020 my_exit_jump();
4633a7c4 2021 /* NOTREACHED */
6224f72b 2022 case 3:
3280af22 2023 if (PL_restartop) {
533c011a 2024 PL_op = PL_restartop;
3280af22 2025 PL_restartop = 0;
312caa8e 2026 goto redo_body;
4633a7c4 2027 }
3280af22 2028 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2029 if (flags & G_ARRAY)
2030 retval = 0;
2031 else {
2032 retval = 1;
3280af22 2033 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2034 }
312caa8e 2035 break;
4633a7c4
LW
2036 }
2037
14dd3ad8 2038 JMPENV_POP;
4633a7c4 2039 if (flags & G_DISCARD) {
3280af22 2040 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2041 retval = 0;
2042 FREETMPS;
2043 LEAVE;
2044 }
533c011a 2045 PL_op = oldop;
4633a7c4
LW
2046 return retval;
2047}
2048
954c1994
GS
2049/*
2050=for apidoc p||eval_pv
2051
2052Tells Perl to C<eval> the given string and return an SV* result.
2053
2054=cut
2055*/
2056
137443ea 2057SV*
864dbfa3 2058Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2059{
2060 dSP;
2061 SV* sv = newSVpv(p, 0);
2062
864dbfa3 2063 eval_sv(sv, G_SCALAR);
137443ea
PP
2064 SvREFCNT_dec(sv);
2065
2066 SPAGAIN;
2067 sv = POPs;
2068 PUTBACK;
2069
2d8e6c8d
GS
2070 if (croak_on_error && SvTRUE(ERRSV)) {
2071 STRLEN n_a;
cea2e8a9 2072 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2073 }
137443ea
PP
2074
2075 return sv;
2076}
2077
4633a7c4
LW
2078/* Require a module. */
2079
954c1994
GS
2080/*
2081=for apidoc p||require_pv
2082
7d3fb230
BS
2083Tells Perl to C<require> the file named by the string argument. It is
2084analogous to the Perl code C<eval "require '$file'">. It's even
2085implemented that way; consider using Perl_load_module instead.
954c1994 2086
7d3fb230 2087=cut */
954c1994 2088
4633a7c4 2089void
864dbfa3 2090Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2091{
d3acc0f7
JP
2092 SV* sv;
2093 dSP;
e788e7d3 2094 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2095 PUTBACK;
2096 sv = sv_newmortal();
4633a7c4
LW
2097 sv_setpv(sv, "require '");
2098 sv_catpv(sv, pv);
2099 sv_catpv(sv, "'");
864dbfa3 2100 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2101 SPAGAIN;
2102 POPSTACK;
79072805
LW
2103}
2104
79072805 2105void
864dbfa3 2106Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW
2107{
2108 register GV *gv;
2109
155aba94 2110 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2111 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2112}
2113
76e3520e 2114STATIC void
cea2e8a9 2115S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2116{
ab821d7f 2117 /* This message really ought to be max 23 lines.
75c72d73 2118 * Removed -h because the user already knows that option. Others? */
fb73857a 2119
76e3520e 2120 static char *usage_msg[] = {
fb73857a
PP
2121"-0[octal] specify record separator (\\0, if no argument)",
2122"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2123"-C enable native wide character system interfaces",
1950ee41 2124"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2125"-d[:debugger] run program under debugger",
2126"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2127"-e 'command' one line of program (several -e's allowed, omit programfile)",
2128"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2129"-i[extension] edit <> files in place (makes backup if extension supplied)",
2130"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2131"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2132"-[mM][-]module execute `use/no module...' before executing program",
2133"-n assume 'while (<>) { ... }' loop around program",
2134"-p assume loop like -n but print line also, like sed",
2135"-P run program through C preprocessor before compilation",
2136"-s enable rudimentary parsing for switches after programfile",
2137"-S look for programfile using PATH environment variable",
2138"-T enable tainting checks",
2139"-u dump core after parsing program",
fb73857a 2140"-U allow unsafe operations",
aac3bd0d
GS
2141"-v print version, subversion (includes VERY IMPORTANT perl info)",
2142"-V[:variable] print configuration summary (or a single Config.pm variable)",
2143"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS
2144"-W enable all warnings",
2145"-X disable all warnings",
fb73857a
PP
2146"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2147"\n",
2148NULL
2149};
76e3520e 2150 char **p = usage_msg;
fb73857a 2151
b0e47665
GS
2152 PerlIO_printf(PerlIO_stdout(),
2153 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2154 name);
fb73857a 2155 while (*p)
b0e47665 2156 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2157}
2158
79072805
LW
2159/* This routine handles any switches that can be given during run */
2160
2161char *
864dbfa3 2162Perl_moreswitches(pTHX_ char *s)
79072805 2163{
ba210ebe 2164 STRLEN numlen;
c07a80fd 2165 U32 rschar;
79072805
LW
2166
2167 switch (*s) {
2168 case '0':
a863c7d1 2169 {
53305cf1
NC
2170 I32 flags = 0;
2171 numlen = 4;
2172 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
8bfdd7d9 2173 SvREFCNT_dec(PL_rs);
c07a80fd 2174 if (rschar & ~((U8)~0))
8bfdd7d9 2175 PL_rs = &PL_sv_undef;
c07a80fd 2176 else if (!rschar && numlen >= 2)
8bfdd7d9 2177 PL_rs = newSVpvn("", 0);
c07a80fd
PP
2178 else {
2179 char ch = rschar;
8bfdd7d9 2180 PL_rs = newSVpvn(&ch, 1);
79072805
LW
2181 }
2182 return s + numlen;
a863c7d1 2183 }
46487f74
GS
2184 case 'C':
2185 PL_widesyscalls = TRUE;
2186 s++;
2187 return s;
2304df62 2188 case 'F':
3280af22
NIS
2189 PL_minus_F = TRUE;
2190 PL_splitstr = savepv(s + 1);
2304df62
AD
2191 s += strlen(s);
2192 return s;
79072805 2193 case 'a':
3280af22 2194 PL_minus_a = TRUE;
79072805
LW
2195 s++;
2196 return s;
2197 case 'c':
3280af22 2198 PL_minus_c = TRUE;
79072805
LW
2199 s++;
2200 return s;
2201 case 'd':
bbce6d69 2202 forbid_setid("-d");
4633a7c4 2203 s++;
70c94a19
RR
2204 /* The following permits -d:Mod to accepts arguments following an =
2205 in the fashion that -MSome::Mod does. */
2206 if (*s == ':' || *s == '=') {
2207 char *start;
2208 SV *sv;
2209 sv = newSVpv("use Devel::", 0);
2210 start = ++s;
2211 /* We now allow -d:Module=Foo,Bar */
2212 while(isALNUM(*s) || *s==':') ++s;
2213 if (*s != '=')
2214 sv_catpv(sv, start);
2215 else {
2216 sv_catpvn(sv, start, s-start);
2217 sv_catpv(sv, " split(/,/,q{");
2218 sv_catpv(sv, ++s);
2219 sv_catpv(sv, "})");
2220 }
4633a7c4 2221 s += strlen(s);
70c94a19 2222 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2223 }
ed094faf 2224 if (!PL_perldb) {
3280af22 2225 PL_perldb = PERLDB_ALL;
a0d0e21e 2226 init_debugger();
ed094faf 2227 }
79072805
LW
2228 return s;
2229 case 'D':
0453d815 2230 {
79072805 2231#ifdef DEBUGGING
bbce6d69 2232 forbid_setid("-D");
79072805 2233 if (isALPHA(s[1])) {
04932ac8
DM
2234 /* if adding extra options, remember to update DEBUG_MASK */
2235 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW
2236 char *d;
2237
93a17b20 2238 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2239 PL_debug |= 1 << (d - debopts);
79072805
LW
2240 }
2241 else {
3280af22 2242 PL_debug = atoi(s+1);
79072805
LW
2243 for (s++; isDIGIT(*s); s++) ;
2244 }
aea4f609 2245 PL_debug |= DEBUG_TOP_FLAG;
79072805 2246#else
0453d815
PM
2247 if (ckWARN_d(WARN_DEBUGGING))
2248 Perl_warner(aTHX_ WARN_DEBUGGING,
2249 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2250 for (s++; isALNUM(*s); s++) ;
79072805
LW
2251#endif
2252 /*SUPPRESS 530*/
2253 return s;
0453d815 2254 }
4633a7c4 2255 case 'h':
ac27b0f5 2256 usage(PL_origargv[0]);
6ad3d225 2257 PerlProc_exit(0);
79072805 2258 case 'i':
3280af22
NIS
2259 if (PL_inplace)
2260 Safefree(PL_inplace);
2261 PL_inplace = savepv(s+1);
79072805 2262 /*SUPPRESS 530*/
3280af22 2263 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2264 if (*s) {
fb73857a 2265 *s++ = '\0';
7b8d334a
GS
2266 if (*s == '-') /* Additional switches on #! line. */
2267 s++;
2268 }
fb73857a
PP
2269 return s;
2270 case 'I': /* -I handled both here and in parse_perl() */
bbce6d69 2271 forbid_setid("-I");
fb73857a
PP
2272 ++s;
2273 while (*s && isSPACE(*s))
2274 ++s;
2275 if (*s) {
774d564b 2276 char *e, *p;
0df16ed7
GS
2277 p = s;
2278 /* ignore trailing spaces (possibly followed by other switches) */
2279 do {
2280 for (e = p; *e && !isSPACE(*e); e++) ;
2281 p = e;
2282 while (isSPACE(*p))
2283 p++;
2284 } while (*p && *p != '-');
2285 e = savepvn(s, e-s);
9c8a64f0 2286 incpush(e, TRUE, TRUE);
0df16ed7
GS
2287 Safefree(e);
2288 s = p;
2289 if (*s == '-')
2290 s++;
79072805
LW
2291 }
2292 else
a67e862a 2293 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2294 return s;
79072805 2295 case 'l':
3280af22 2296 PL_minus_l = TRUE;
79072805 2297 s++;
7889fe52
NIS
2298 if (PL_ors_sv) {
2299 SvREFCNT_dec(PL_ors_sv);
2300 PL_ors_sv = Nullsv;
2301 }
79072805 2302 if (isDIGIT(*s)) {
53305cf1 2303 I32 flags = 0;
7889fe52 2304 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2305 numlen = 3 + (*s == '0');
2306 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2307 s += numlen;
2308 }
2309 else {
8bfdd7d9 2310 if (RsPARA(PL_rs)) {
7889fe52
NIS
2311 PL_ors_sv = newSVpvn("\n\n",2);
2312 }
2313 else {
8bfdd7d9 2314 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2315 }
79072805
LW
2316 }
2317 return s;
1a30305b 2318 case 'M':
bbce6d69 2319 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2320 /* FALL THROUGH */
2321 case 'm':
bbce6d69 2322 forbid_setid("-m"); /* XXX ? */
1a30305b 2323 if (*++s) {
a5f75d66 2324 char *start;
11343788 2325 SV *sv;
a5f75d66
AD
2326 char *use = "use ";
2327 /* -M-foo == 'no foo' */
2328 if (*s == '-') { use = "no "; ++s; }
11343788 2329 sv = newSVpv(use,0);
a5f75d66 2330 start = s;
1a30305b 2331 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2332 while(isALNUM(*s) || *s==':') ++s;
2333 if (*s != '=') {
11343788 2334 sv_catpv(sv, start);
c07a80fd
PP
2335 if (*(start-1) == 'm') {
2336 if (*s != '\0')
cea2e8a9 2337 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2338 sv_catpv( sv, " ()");
c07a80fd
PP
2339 }
2340 } else {
6df41af2 2341 if (s == start)
be98fb35
GS
2342 Perl_croak(aTHX_ "Module name required with -%c option",
2343 s[-1]);
11343788
MB
2344 sv_catpvn(sv, start, s-start);
2345 sv_catpv(sv, " split(/,/,q{");
2346 sv_catpv(sv, ++s);
2347 sv_catpv(sv, "})");
c07a80fd 2348 }
1a30305b 2349 s += strlen(s);
5c831c24 2350 if (!PL_preambleav)
3280af22
NIS
2351 PL_preambleav = newAV();
2352 av_push(PL_preambleav, sv);
1a30305b
PP
2353 }
2354 else
cea2e8a9 2355 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2356 return s;
79072805 2357 case 'n':
3280af22 2358 PL_minus_n = TRUE;
79072805
LW
2359 s++;
2360 return s;
2361 case 'p':
3280af22 2362 PL_minus_p = TRUE;
79072805
LW
2363 s++;
2364 return s;
2365 case 's':
bbce6d69 2366 forbid_setid("-s");
3280af22 2367 PL_doswitches = TRUE;
79072805
LW
2368 s++;
2369 return s;
463ee0b2 2370 case 'T':
3280af22 2371 if (!PL_tainting)
cea2e8a9 2372 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW
2373 s++;
2374 return s;
79072805 2375 case 'u':
bf4acbe4
GS
2376#ifdef MACOS_TRADITIONAL
2377 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2378#endif
3280af22 2379 PL_do_undump = TRUE;
79072805
LW
2380 s++;
2381 return s;
2382 case 'U':
3280af22 2383 PL_unsafe = TRUE;
79072805
LW
2384 s++;
2385 return s;
2386 case 'v':
8e9464f1 2387#if !defined(DGUX)
b0e47665 2388 PerlIO_printf(PerlIO_stdout(),
d2560b70 2389 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2390 PL_patchlevel, ARCHNAME));
8e9464f1
JH
2391#else /* DGUX */
2392/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2393 PerlIO_printf(PerlIO_stdout(),
2394 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2395 PerlIO_printf(PerlIO_stdout(),
2396 Perl_form(aTHX_ " built under %s at %s %s\n",
2397 OSNAME, __DATE__, __TIME__));
2398 PerlIO_printf(PerlIO_stdout(),
2399 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2400 OSVERS));
8e9464f1
JH
2401#endif /* !DGUX */
2402
fb73857a
PP
2403#if defined(LOCAL_PATCH_COUNT)
2404 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2405 PerlIO_printf(PerlIO_stdout(),
2406 "\n(with %d registered patch%s, "
2407 "see perl -V for more detail)",
2408 (int)LOCAL_PATCH_COUNT,
2409 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2410#endif
1a30305b 2411
b0e47665 2412 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2413 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH
2414#ifdef MACOS_TRADITIONAL
2415 PerlIO_printf(PerlIO_stdout(),
084592ab 2416 "\nMac OS port Copyright (c) 1991-2001, Matthias Neeracher\n");
eae9c151 2417#endif
79072805 2418#ifdef MSDOS
b0e47665
GS
2419 PerlIO_printf(PerlIO_stdout(),
2420 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2421#endif
2422#ifdef DJGPP
b0e47665
GS
2423 PerlIO_printf(PerlIO_stdout(),
2424 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2425 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2426#endif
79072805 2427#ifdef OS2
b0e47665
GS
2428 PerlIO_printf(PerlIO_stdout(),
2429 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2430 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2431#endif
79072805 2432#ifdef atarist
b0e47665
GS
2433 PerlIO_printf(PerlIO_stdout(),
2434 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2435#endif
a3f9223b 2436#ifdef __BEOS__
b0e47665
GS
2437 PerlIO_printf(PerlIO_stdout(),
2438 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2439#endif
1d84e8df 2440#ifdef MPE
b0e47665 2441 PerlIO_printf(PerlIO_stdout(),
dc22e1c4 2442 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2001\n");
1d84e8df 2443#endif
9d116dd7 2444#ifdef OEMVS
b0e47665
GS
2445 PerlIO_printf(PerlIO_stdout(),
2446 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2447#endif
495c5fdc 2448#ifdef __VOS__
b0e47665
GS
2449 PerlIO_printf(PerlIO_stdout(),
2450 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2451#endif
092bebab 2452#ifdef __OPEN_VM
b0e47665
GS
2453 PerlIO_printf(PerlIO_stdout(),
2454 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2455#endif
a1a0e61e 2456#ifdef POSIX_BC
b0e47665
GS
2457 PerlIO_printf(PerlIO_stdout(),
2458 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2459#endif
61ae2fbf 2460#ifdef __MINT__
b0e47665
GS
2461 PerlIO_printf(PerlIO_stdout(),
2462 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2463#endif
f83d2536 2464#ifdef EPOC
b0e47665
GS
2465 PerlIO_printf(PerlIO_stdout(),
2466 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2467#endif
e1caacb4
JH
2468#ifdef UNDER_CE
2469 printf("WINCE port by Rainer Keuchel, 2001\n");
2470 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2471 wce_hitreturn();
2472#endif
baed7233
DL
2473#ifdef BINARY_BUILD_NOTICE
2474 BINARY_BUILD_NOTICE;
2475#endif
b0e47665
GS
2476 PerlIO_printf(PerlIO_stdout(),
2477 "\n\
79072805 2478Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2479GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2480Complete documentation for Perl, including FAQ lists, should be found on\n\
2481this system using `man perl' or `perldoc perl'. If you have access to the\n\
2482Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2483 PerlProc_exit(0);
79072805 2484 case 'w':
599cee73 2485 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2486 PL_dowarn |= G_WARN_ON;
599cee73
PM
2487 s++;
2488 return s;
2489 case 'W':
ac27b0f5 2490 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
d3a7d8c7 2491 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2492 s++;
2493 return s;
2494 case 'X':
ac27b0f5 2495 PL_dowarn = G_WARN_ALL_OFF;
d3a7d8c7 2496 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2497 s++;
2498 return s;
a0d0e21e 2499 case '*':
79072805
LW
2500 case ' ':
2501 if (s[1] == '-') /* Additional switches on #! line. */
2502 return s+2;
2503 break;
a0d0e21e 2504 case '-':
79072805 2505 case 0:
51882d45 2506#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2507 case '\r':
2508#endif
79072805
LW
2509 case '\n':
2510 case '\t':
2511 break;
aa689395
PP
2512#ifdef ALTERNATE_SHEBANG
2513 case 'S': /* OS/2 needs -S on "extproc" line. */
2514 break;
2515#endif
a0d0e21e 2516 case 'P':
3280af22 2517 if (PL_preprocess)
a0d0e21e
LW
2518 return s+1;
2519 /* FALL THROUGH */
79072805 2520 default:
cea2e8a9 2521 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2522 }
2523 return Nullch;
2524}
2525
2526/* compliments of Tom Christiansen */
2527
2528/* unexec() can be found in the Gnu emacs distribution */
ee580363 2529/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2530
2531void
864dbfa3 2532Perl_my_unexec(pTHX)
79072805
LW
2533{
2534#ifdef UNEXEC
46fc3d4c
PP
2535 SV* prog;
2536 SV* file;
ee580363 2537 int status = 1;
79072805
LW
2538 extern int etext;
2539
ee580363 2540 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2541 sv_catpv(prog, "/perl");
6b88bc9c 2542 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2543 sv_catpv(file, ".perldump");
79072805 2544
ee580363
GS
2545 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2546 /* unexec prints msg to stderr in case of failure */
6ad3d225 2547 PerlProc_exit(status);
79072805 2548#else
a5f75d66
AD
2549# ifdef VMS
2550# include <lib$routines.h>
2551 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2552# else
79072805 2553 ABORT(); /* for use with undump */
aa689395 2554# endif
a5f75d66 2555#endif
79072805
LW
2556}
2557
cb68f92d
GS
2558/* initialize curinterp */
2559STATIC void
cea2e8a9 2560S_init_interp(pTHX)
cb68f92d
GS
2561{
2562
acfe0abc
GS
2563#ifdef MULTIPLICITY
2564# define PERLVAR(var,type)
2565# define PERLVARA(var,n,type)
2566# if defined(PERL_IMPLICIT_CONTEXT)
2567# if defined(USE_5005THREADS)
2568# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2569# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
2570# else /* !USE_5005THREADS */
2571# define PERLVARI(var,type,init) aTHX->var = init;
2572# define PERLVARIC(var,type,init) aTHX->var = init;
2573# endif /* USE_5005THREADS */
3967c732 2574# else
acfe0abc
GS
2575# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2576# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2577# endif
acfe0abc
GS
2578# include "intrpvar.h"
2579# ifndef USE_5005THREADS
2580# include "thrdvar.h"
2581# endif
2582# undef PERLVAR
2583# undef PERLVARA
2584# undef PERLVARI
2585# undef PERLVARIC
2586#else
2587# define PERLVAR(var,type)
2588# define PERLVARA(var,n,type)
2589# define PERLVARI(var,type,init) PL_##var = init;
2590# define PERLVARIC(var,type,init) PL_##var = init;
2591# include "intrpvar.h"
2592# ifndef USE_5005THREADS
2593# include "thrdvar.h"
2594# endif
2595# undef PERLVAR
2596# undef PERLVARA
2597# undef PERLVARI
2598# undef PERLVARIC
cb68f92d
GS
2599#endif
2600
cb68f92d
GS
2601}
2602
76e3520e 2603STATIC void
cea2e8a9 2604S_init_main_stash(pTHX)
79072805 2605{
463ee0b2 2606 GV *gv;
6e72f9df 2607
3d47000e 2608
ac27b0f5 2609
3280af22 2610 PL_curstash = PL_defstash = newHV();
79cb57f6 2611 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
2612 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2613 SvREFCNT_dec(GvHV(gv));
3280af22 2614 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2615 SvREADONLY_on(gv);
3280af22
NIS
2616 HvNAME(PL_defstash) = savepv("main");
2617 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2618 GvMULTI_on(PL_incgv);
2619 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2620 GvMULTI_on(PL_hintgv);
2621 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2622 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2623 GvMULTI_on(PL_errgv);
2624 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2625 GvMULTI_on(PL_replgv);
cea2e8a9 2626 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
2627 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2628 sv_setpvn(ERRSV, "", 0);
3280af22 2629 PL_curstash = PL_defstash;
11faa288 2630 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2631 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2632 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2633 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2634 /* We must init $/ before switches are processed. */
864dbfa3 2635 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
2636}
2637
76e3520e 2638STATIC void
cea2e8a9 2639S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2640{
6c4ab083 2641 *fdscript = -1;
79072805 2642
3280af22
NIS
2643 if (PL_e_script) {
2644 PL_origfilename = savepv("-e");
96436eeb 2645 }
6c4ab083
GS
2646 else {
2647 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2648 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
2649
2650 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2651 char *s = scriptname + 8;
2652 *fdscript = atoi(s);
2653 while (isDIGIT(*s))
2654 s++;
2655 if (*s) {
2656 scriptname = savepv(s + 1);
3280af22
NIS
2657 Safefree(PL_origfilename);
2658 PL_origfilename = scriptname;
6c4ab083
GS
2659 }
2660 }
2661 }
2662
f4dd75d9
GS
2663#ifdef USE_ITHREADS
2664 Safefree(CopFILE(PL_curcop));
2665#else
2666 SvREFCNT_dec(CopFILEGV(PL_curcop));
2667#endif
57843af0 2668 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2669 if (strEQ(PL_origfilename,"-"))
79072805 2670 scriptname = "";
01f988be 2671 if (*fdscript >= 0) {
3280af22 2672 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
96436eeb 2673#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS
2674 if (PL_rsfp)
2675 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb
PP
2676#endif
2677 }
3280af22 2678 else if (PL_preprocess) {
46fc3d4c 2679 char *cpp_cfg = CPPSTDIN;
79cb57f6 2680 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
2681 SV *cmd = NEWSV(0,0);
2682
2683 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2684 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2685 sv_catpv(cpp, cpp_cfg);
79072805 2686
0df16ed7 2687 sv_catpvn(sv, "-I", 2);
fed7345c 2688 sv_catpv(sv,PRIVLIB_EXP);
46fc3d4c 2689
14953ddc
MB
2690 DEBUG_P(PerlIO_printf(Perl_debug_log,
2691 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2692 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
52853b95 2693#if defined(MSDOS) || defined(WIN32)
cea2e8a9 2694 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW
2695sed %s -e \"/^[^#]/b\" \
2696 -e \"/^#[ ]*include[ ]/b\" \
2697 -e \"/^#[ ]*define[ ]/b\" \
2698 -e \"/^#[ ]*if[ ]/b\" \
2699 -e \"/^#[ ]*ifdef[ ]/b\" \
2700 -e \"/^#[ ]*ifndef[ ]/b\" \
2701 -e \"/^#[ ]*else/b\" \
2702 -e \"/^#[ ]*elif[ ]/b\" \
2703 -e \"/^#[ ]*undef[ ]/b\" \
2704 -e \"/^#[ ]*endif/b\" \
2705 -e \"s/^#.*//\" \
894356b3 2706 %s | %"SVf" -C %"SVf" %s",
6b88bc9c 2707 (PL_doextract ? "-e \"1,/^#/d\n\"" : ""),
79072805 2708#else
092bebab 2709# ifdef __OPEN_VM
cea2e8a9 2710 Perl_sv_setpvf(aTHX_ cmd, "\
092bebab
JH
2711%s %s -e '/^[^#]/b' \
2712 -e '/^#[ ]*include[ ]/b' \
2713 -e '/^#[ ]*define[ ]/b' \
2714 -e '/^#[ ]*if[ ]/b' \
2715 -e '/^#[ ]*ifdef[ ]/b' \
2716 -e '/^#[ ]*ifndef[ ]/b' \
2717 -e '/^#[ ]*else/b' \
2718 -e '/^#[ ]*elif[ ]/b' \
2719 -e '/^#[ ]*undef[ ]/b' \
2720 -e '/^#[ ]*endif/b' \
2721 -e 's/^[ ]*#.*//' \
894356b3 2722 %s | %"SVf" %"SVf" %s",
092bebab 2723# else
cea2e8a9 2724 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW
2725%s %s -e '/^[^#]/b' \
2726 -e '/^#[ ]*include[ ]/b' \
2727 -e '/^#[ ]*define[ ]/b' \
2728 -e '/^#[ ]*if[ ]/b' \
2729 -e '/^#[ ]*ifdef[ ]/b' \
2730 -e '/^#[ ]*ifndef[ ]/b' \
2731 -e '/^#[ ]*else/b' \
2732 -e '/^#[ ]*elif[ ]/b' \
2733 -e '/^#[ ]*undef[ ]/b' \
2734 -e '/^#[ ]*endif/b' \
2735 -e 's/^[ ]*#.*//' \
894356b3 2736 %s | %"SVf" -C %"SVf" %s",
092bebab 2737# endif
79072805
LW
2738#ifdef LOC_SED
2739 LOC_SED,
2740#else
2741 "sed",
2742#endif
3280af22 2743 (PL_doextract ? "-e '1,/^#/d\n'" : ""),
79072805 2744#endif
46fc3d4c 2745 scriptname, cpp, sv, CPPMINUS);
3280af22 2746 PL_doextract = FALSE;
79072805 2747#ifdef IAMSUID /* actually, this is caught earlier */
b28d0864 2748 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
79072805 2749#ifdef HAS_SETEUID
b28d0864 2750 (void)seteuid(PL_uid); /* musn't stay setuid root */
79072805
LW
2751#else
2752#ifdef HAS_SETREUID
b28d0864 2753 (void)setreuid((Uid_t)-1, PL_uid);
85e6fe83
LW
2754#else
2755#ifdef HAS_SETRESUID
b28d0864 2756 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
79072805 2757#else
b28d0864 2758 PerlProc_setuid(PL_uid);
79072805
LW
2759#endif
2760#endif
85e6fe83 2761#endif
b28d0864 2762 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2763 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805
LW
2764 }
2765#endif /* IAMSUID */
3280af22 2766 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c
PP
2767 SvREFCNT_dec(cmd);
2768 SvREFCNT_dec(cpp);
79072805
LW
2769 }
2770 else if (!*scriptname) {
bbce6d69 2771 forbid_setid("program input from stdin");
3280af22 2772 PL_rsfp = PerlIO_stdin();
79072805 2773 }
96436eeb 2774 else {
3280af22 2775 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
96436eeb 2776#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS
2777 if (PL_rsfp)
2778 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb
PP
2779#endif
2780 }
3280af22 2781 if (!PL_rsfp) {
13281fa4 2782#ifdef DOSUID
a687059c 2783#ifndef IAMSUID /* in case script is not readable before setuid */
6b88bc9c 2784 if (PL_euid &&
cc49e20b 2785 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
6b88bc9c
GS
2786 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2787 {
46fc3d4c 2788 /* try again */
a7cb1f99 2789 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
2790 (int)PERL_REVISION, (int)PERL_VERSION,
2791 (int)PERL_SUBVERSION), PL_origargv);
cea2e8a9 2792 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
2793 }
2794#endif
2795#endif
584d69ec
JH
2796#ifdef IAMSUID
2797 errno = EPERM;
2798 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2799 Strerror(errno));
2800#else
cea2e8a9 2801 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
cc49e20b 2802 CopFILE(PL_curcop), Strerror(errno));
584d69ec 2803#endif
13281fa4 2804 }
79072805 2805}
8d063cd8 2806
7b89560d
JH
2807/* Mention
2808 * I_SYSSTATVFS HAS_FSTATVFS
2809 * I_SYSMOUNT
c890dc6c 2810 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
2811 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2812 * here so that metaconfig picks them up. */
2813
104d25b7 2814#ifdef IAMSUID
864dbfa3 2815STATIC int
e688b231 2816S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2817{
0545a864
JH
2818 int check_okay = 0; /* able to do all the required sys/libcalls */
2819 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2820/*
ad27e871 2821 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2822 * fstatvfs() is UNIX98.
0545a864 2823 * fstatfs() is 4.3 BSD.
ad27e871 2824 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
2825 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2826 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
2827 */
2828
6439433f
JH
2829#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2830
2831# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2832 defined(HAS_FSTATVFS)
2833# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2834 struct statvfs stfs;
6439433f 2835
104d25b7
JH
2836 check_okay = fstatvfs(fd, &stfs) == 0;
2837 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2838# endif /* fstatvfs */
ac27b0f5 2839
6439433f
JH
2840# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2841 defined(PERL_MOUNT_NOSUID) && \
2842 defined(HAS_FSTATFS) && \
2843 defined(HAS_STRUCT_STATFS) && \
2844 defined(HAS_STRUCT_STATFS_F_FLAGS)
2845# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2846 struct statfs stfs;
6439433f 2847
104d25b7 2848 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2849 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH
2850# endif /* fstatfs */
2851
2852# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2853 defined(PERL_MOUNT_NOSUID) && \
2854 defined(HAS_FSTAT) && \
2855 defined(HAS_USTAT) && \
2856 defined(HAS_GETMNT) && \
2857 defined(HAS_STRUCT_FS_DATA) && \
2858 defined(NOSTAT_ONE)
2859# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2860 struct stat fdst;
6439433f 2861
0545a864 2862 if (fstat(fd, &fdst) == 0) {
6439433f
JH
2863 struct ustat us;
2864 if (ustat(fdst.st_dev, &us) == 0) {
2865 struct fs_data fsd;
2866 /* NOSTAT_ONE here because we're not examining fields which
2867 * vary between that case and STAT_ONE. */
ad27e871 2868 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
2869 size_t cmplen = sizeof(us.f_fname);
2870 if (sizeof(fsd.fd_req.path) < cmplen)
2871 cmplen = sizeof(fsd.fd_req.path);
2872 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2873 fdst.st_dev == fsd.fd_req.dev) {
2874 check_okay = 1;
2875 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2876 }
2877 }
2878 }
2879 }
0545a864 2880 }
6439433f
JH
2881# endif /* fstat+ustat+getmnt */
2882
2883# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2884 defined(HAS_GETMNTENT) && \
2885 defined(HAS_HASMNTOPT) && \
2886 defined(MNTOPT_NOSUID)
2887# define FD_ON_NOSUID_CHECK_OKAY
2888 FILE *mtab = fopen("/etc/mtab", "r");
2889 struct mntent *entry;
2890 struct stat stb, fsb;
104d25b7
JH
2891
2892 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
2893 while (entry = getmntent(mtab)) {
2894 if (stat(entry->mnt_dir, &fsb) == 0
2895 && fsb.st_dev == stb.st_dev)
2896 {
2897 /* found the filesystem */
2898 check_okay = 1;
2899 if (hasmntopt(entry, MNTOPT_NOSUID))
2900 on_nosuid = 1;
2901 break;
2902 } /* A single fs may well fail its stat(). */
2903 }
104d25b7
JH
2904 }
2905 if (mtab)
6439433f
JH
2906 fclose(mtab);
2907# endif /* getmntent+hasmntopt */
0545a864 2908
ac27b0f5 2909 if (!check_okay)
0545a864 2910 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH
2911 return on_nosuid;
2912}
2913#endif /* IAMSUID */
2914
76e3520e 2915STATIC void
cea2e8a9 2916S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2917{
155aba94 2918#ifdef IAMSUID
96436eeb 2919 int which;
155aba94 2920#endif
96436eeb 2921
13281fa4
LW
2922 /* do we need to emulate setuid on scripts? */
2923
2924 /* This code is for those BSD systems that have setuid #! scripts disabled
2925 * in the kernel because of a security problem. Merely defining DOSUID
2926 * in perl will not fix that problem, but if you have disabled setuid
2927 * scripts in the kernel, this will attempt to emulate setuid and setgid
2928 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
2929 * root version must be called suidperl or sperlN.NNN. If regular perl
2930 * discovers that it has opened a setuid script, it calls suidperl with
2931 * the same argv that it had. If suidperl finds that the script it has
2932 * just opened is NOT setuid root, it sets the effective uid back to the
2933 * uid. We don't just make perl setuid root because that loses the
2934 * effective uid we had before invoking perl, if it was different from the
2935 * uid.
13281fa4
LW
2936 *
2937 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2938 * be defined in suidperl only. suidperl must be setuid root. The
2939 * Configure script will set this up for you if you want it.
2940 */
a687059c 2941
13281fa4 2942#ifdef DOSUID
6e72f9df 2943 char *s, *s2;
a0d0e21e 2944
b28d0864 2945 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2946 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2947 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2948 I32 len;
2d8e6c8d 2949 STRLEN n_a;
13281fa4 2950
a687059c 2951#ifdef IAMSUID
fe14fcc3 2952#ifndef HAS_SETREUID
a687059c
LW
2953 /* On this access check to make sure the directories are readable,
2954 * there is actually a small window that the user could use to make
2955 * filename point to an accessible directory. So there is a faint
2956 * chance that someone could execute a setuid script down in a
2957 * non-accessible directory. I don't know what to do about that.
2958 * But I don't think it's too important. The manual lies when
2959 * it says access() is useful in setuid programs.
2960 */
cc49e20b 2961 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2962 Perl_croak(aTHX_ "Permission denied");
a687059c
LW
2963#else
2964 /* If we can swap euid and uid, then we can determine access rights
2965 * with a simple stat of the file, and then compare device and
2966 * inode to make sure we did stat() on the same file we opened.
2967 * Then we just have to make sure he or she can execute it.
2968 */
2969 {
2970 struct stat tmpstatbuf;
2971
85e6fe83
LW
2972 if (
2973#ifdef HAS_SETREUID
b28d0864 2974 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW
2975#else
2976# if HAS_SETRESUID
b28d0864 2977 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 2978# endif
85e6fe83 2979#endif
b28d0864 2980 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 2981 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 2982 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 2983 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 2984#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 2985 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 2986 Perl_croak(aTHX_ "Permission denied");
104d25b7 2987#endif
b28d0864
NIS
2988 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
2989 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
2990 (void)PerlIO_close(PL_rsfp);
cea2e8a9 2991 Perl_croak(aTHX_ "Permission denied\n");
a687059c 2992 }
85e6fe83
LW
2993 if (
2994#ifdef HAS_SETREUID
b28d0864 2995 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW
2996#else
2997# if defined(HAS_SETRESUID)
b28d0864 2998 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 2999# endif
85e6fe83 3000#endif
b28d0864 3001 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3002 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3003 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3004 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3005 }
fe14fcc3 3006#endif /* HAS_SETREUID */
a687059c
LW
3007#endif /* IAMSUID */
3008
b28d0864 3009 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3010 Perl_croak(aTHX_ "Permission denied");
b28d0864 3011 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3012 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3013 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3014 CopLINE_inc(PL_curcop);
6b88bc9c 3015 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3016 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3017 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3018 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3019 if (*s == ' ') s++;
45d8adaa 3020 while (!isSPACE(*s)) s++;
2d8e6c8d 3021 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df
PP
3022 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3023 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3024 Perl_croak(aTHX_ "Not a perl script");
a687059c 3025 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3026 /*
3027 * #! arg must be what we saw above. They can invoke it by
3028 * mentioning suidperl explicitly, but they may not add any strange
3029 * arguments beyond what #! says if they do invoke suidperl that way.
3030 */
3031 len = strlen(validarg);
3032 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3033 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3034 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW
3035
3036#ifndef IAMSUID
b28d0864
NIS
3037 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3038 PL_euid == PL_statbuf.st_uid)
3039 if (!PL_do_undump)
cea2e8a9 3040 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3041FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3042#endif /* IAMSUID */
13281fa4 3043
b28d0864
NIS
3044 if (PL_euid) { /* oops, we're not the setuid root perl */
3045 (void)PerlIO_close(PL_rsfp);
13281fa4 3046#ifndef IAMSUID
46fc3d4c 3047 /* try again */
a7cb1f99 3048 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3049 (int)PERL_REVISION, (int)PERL_VERSION,
3050 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3051#endif
cea2e8a9 3052 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
3053 }
3054
b28d0864 3055 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3056#ifdef HAS_SETEGID
b28d0864 3057 (void)setegid(PL_statbuf.st_gid);
a687059c 3058#else
fe14fcc3 3059#ifdef HAS_SETREGID
b28d0864 3060 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW
3061#else
3062#ifdef HAS_SETRESGID
b28d0864 3063 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3064#else
b28d0864 3065 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW
3066#endif
3067#endif
85e6fe83 3068#endif
b28d0864 3069 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3070 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3071 }
b28d0864
NIS
3072 if (PL_statbuf.st_mode & S_ISUID) {
3073 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3074#ifdef HAS_SETEUID
b28d0864 3075 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3076#else
fe14fcc3 3077#ifdef HAS_SETREUID
b28d0864 3078 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW
3079#else
3080#ifdef HAS_SETRESUID
b28d0864 3081 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3082#else
b28d0864 3083 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW
3084#endif
3085#endif
85e6fe83 3086#endif
b28d0864 3087 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3088 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3089 }
b28d0864 3090 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3091#ifdef HAS_SETEUID
b28d0864 3092 (void)seteuid((Uid_t)PL_uid);
a687059c 3093#else
fe14fcc3 3094#ifdef HAS_SETREUID
b28d0864 3095 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3096#else
85e6fe83 3097#ifdef HAS_SETRESUID
b28d0864 3098 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3099#else
b28d0864 3100 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3101#endif
a687059c
LW
3102#endif
3103#endif
b28d0864 3104 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3105 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3106 }
748a9306 3107 init_ids();
b28d0864 3108 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3109 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW
3110 }
3111#ifdef IAMSUID
6b88bc9c 3112 else if (PL_preprocess)
cea2e8a9 3113 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3114 else if (fdscript >= 0)
cea2e8a9 3115 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3116 else
cea2e8a9 3117 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb
PP
3118
3119 /* We absolutely must clear out any saved ids here, so we */
3120 /* exec the real perl, substituting fd script for scriptname. */
3121 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS
3122 PerlIO_rewind(PL_rsfp);
3123 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS
3124 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3125 if (!PL_origargv[which])
cea2e8a9
GS
3126 Perl_croak(aTHX_ "Permission denied");
3127 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3128 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3129#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3130 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3131#endif
a7cb1f99 3132 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3133 (int)PERL_REVISION, (int)PERL_VERSION,
3134 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3135 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3136#endif /* IAMSUID */
a687059c 3137#else /* !DOSUID */
3280af22 3138 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3139#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS
3140 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3141 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3142 ||
b28d0864 3143 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3144 )
b28d0864 3145 if (!PL_do_undump)
cea2e8a9 3146 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3147FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3148#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3149 /* not set-id, must be wrapped */
a687059c 3150 }
13281fa4 3151#endif /* DOSUID */
79072805 3152}
13281fa4 3153
76e3520e 3154STATIC void
cea2e8a9 3155S_find_beginning(pTHX)
79072805 3156{
6e72f9df 3157 register char *s, *s2;
33b78306
LW
3158
3159 /* skip forward in input to the real script? */
3160
bbce6d69 3161 forbid_setid("-x");
bf4acbe4 3162#ifdef MACOS_TRADITIONAL
084592ab 3163 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3164
bf4acbe4
GS
3165 while (PL_doextract || gMacPerl_AlwaysExtract) {
3166 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3167 if (!gMacPerl_AlwaysExtract)
3168 Perl_croak(aTHX_ "No Perl script found in input\n");
3169
3170 if (PL_doextract) /* require explicit override ? */
3171 if (!OverrideExtract(PL_origfilename))
3172 Perl_croak(aTHX_ "User aborted script\n");
3173 else
3174 PL_doextract = FALSE;
3175
3176 /* Pater peccavi, file does not have #! */
3177 PerlIO_rewind(PL_rsfp);
ac27b0f5 3178
bf4acbe4
GS
3179 break;
3180 }
3181#else
3280af22
NIS
3182 while (PL_doextract) {
3183 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3184 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3185#endif
4f0c37ba
IZ
3186 s2 = s;
3187 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS
3188 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3189 PL_doextract = FALSE;
6e72f9df
PP
3190 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3191 s2 = s;
3192 while (*s == ' ' || *s == '\t') s++;
3193 if (*s++ == '-') {
3194 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3195 if (strnEQ(s2-4,"perl",4))
3196 /*SUPPRESS 530*/
155aba94
GS
3197 while ((s = moreswitches(s)))
3198 ;
33b78306 3199 }
95e8664e
CN
3200#ifdef MACOS_TRADITIONAL
3201 break;
3202#endif
83025b21
LW
3203 }
3204 }
3205}
3206
afe37c7d 3207
76e3520e 3208STATIC void
cea2e8a9 3209S_init_ids(pTHX)
352d5a3a 3210{
d8eceb89
JH
3211 PL_uid = PerlProc_getuid();
3212 PL_euid = PerlProc_geteuid();
3213 PL_gid = PerlProc_getgid();
3214 PL_egid = PerlProc_getegid();
748a9306 3215#ifdef VMS
b28d0864
NIS
3216 PL_uid |= PL_gid << 16;
3217 PL_euid |= PL_egid << 16;
748a9306 3218#endif
3280af22 3219 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3220}
79072805 3221
76e3520e 3222STATIC void
cea2e8a9 3223S_forbid_setid(pTHX_ char *s)
bbce6d69 3224{
3280af22 3225 if (PL_euid != PL_uid)
cea2e8a9 3226 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3227 if (PL_egid != PL_gid)
cea2e8a9 3228 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69
PP
3229}
3230
1ee4443e
IZ
3231void
3232Perl_init_debugger(pTHX)
748a9306 3233{
1ee4443e
IZ
3234 HV *ostash = PL_curstash;
3235
3280af22
NIS
3236 PL_curstash = PL_debstash;
3237 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3238 AvREAL_off(PL_dbargs);
3239 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3240 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3241 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3242 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3243 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3244 sv_setiv(PL_DBsingle, 0);
3280af22 3245 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3246 sv_setiv(PL_DBtrace, 0);
3280af22 3247 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3248 sv_setiv(PL_DBsignal, 0);
1ee4443e 3249 PL_curstash = ostash;
352d5a3a
LW
3250}
3251
2ce36478
SM
3252#ifndef STRESS_REALLOC
3253#define REASONABLE(size) (size)
3254#else
3255#define REASONABLE(size) (1) /* unreasonable */
3256#endif
3257
11343788 3258void
cea2e8a9 3259Perl_init_stacks(pTHX)
79072805 3260{
e336de0d 3261 /* start with 128-item stack and 8K cxstack */
3280af22 3262 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3263 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS
3264 PL_curstackinfo->si_type = PERLSI_MAIN;
3265 PL_curstack = PL_curstackinfo->si_stack;
3266 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3267
3280af22
NIS
3268 PL_stack_base = AvARRAY(PL_curstack);
3269 PL_stack_sp = PL_stack_base;
3270 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3271
3280af22
NIS
3272 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3273 PL_tmps_floor = -1;
3274 PL_tmps_ix = -1;
3275 PL_tmps_max = REASONABLE(128);
8990e307 3276
3280af22
NIS
3277 New(54,PL_markstack,REASONABLE(32),I32);
3278 PL_markstack_ptr = PL_markstack;
3279 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3280
ce2f7c3b 3281 SET_MARK_OFFSET;
e336de0d 3282
3280af22
NIS
3283 New(54,PL_scopestack,REASONABLE(32),I32);
3284 PL_scopestack_ix = 0;
3285 PL_scopestack_max = REASONABLE(32);
79072805 3286
3280af22
NIS
3287 New(54,PL_savestack,REASONABLE(128),ANY);
3288 PL_savestack_ix = 0;
3289 PL_savestack_max = REASONABLE(128);
79072805 3290
3280af22
NIS
3291 New(54,PL_retstack,REASONABLE(16),OP*);
3292 PL_retstack_ix = 0;
3293 PL_retstack_max = REASONABLE(16);
378cc40b 3294}
33b78306 3295
2ce36478
SM
3296#undef REASONABLE
3297
76e3520e 3298STATIC void
cea2e8a9 3299S_nuke_stacks(pTHX)
6e72f9df 3300{
3280af22
NIS
3301 while (PL_curstackinfo->si_next)
3302 PL_curstackinfo = PL_curstackinfo->si_next;
3303 while (PL_curstackinfo) {
3304 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3305 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS
3306 Safefree(PL_curstackinfo->si_cxstack);
3307 Safefree(PL_curstackinfo);
3308 PL_curstackinfo = p;
e336de0d 3309 }
3280af22
NIS
3310 Safefree(PL_tmps_stack);
3311 Safefree(PL_markstack);
3312 Safefree(PL_scopestack);
3313 Safefree(PL_savestack);
3314 Safefree(PL_retstack);
378cc40b 3315}
33b78306 3316
76e3520e 3317STATIC void
cea2e8a9 3318S_init_lexer(pTHX)
8990e307 3319{
06039172 3320 PerlIO *tmpfp;
3280af22
NIS
3321 tmpfp = PL_rsfp;
3322 PL_rsfp = Nullfp;
3323 lex_start(PL_linestr);
3324 PL_rsfp = tmpfp;
79cb57f6 3325 PL_subname = newSVpvn("main",4);
8990e307
LW
3326}
3327
76e3520e 3328STATIC void
cea2e8a9 3329S_init_predump_symbols(pTHX)
45d8adaa 3330{
93a17b20 3331 GV *tmpgv;
af8c498a 3332 IO *io;
79072805 3333
864dbfa3 3334 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS
3335 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3336 GvMULTI_on(PL_stdingv);
af8c498a 3337 io = GvIOp(PL_stdingv);
a04651f4 3338 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3339 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3340 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3341 GvMULTI_on(tmpgv);
af8c498a 3342 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3343
85e6fe83 3344 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3345 GvMULTI_on(tmpgv);
af8c498a 3346 io = GvIOp(tmpgv);
a04651f4 3347 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3348 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3349 setdefout(tmpgv);
adbc6bb1 3350 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3351 GvMULTI_on(tmpgv);
af8c498a 3352 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3353
bf49b057
GS
3354 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3355 GvMULTI_on(PL_stderrgv);
3356 io = GvIOp(PL_stderrgv);
a04651f4 3357 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3358 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3359 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3360 GvMULTI_on(tmpgv);
af8c498a 3361 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3362
3280af22 3363 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3364
bf4acbe4
GS
3365 if (PL_osname)
3366 Safefree(PL_osname);
3367 PL_osname = savepv(OSNAME);
79072805 3368}
33b78306 3369
76e3520e 3370STATIC void
cea2e8a9 3371S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
33b78306 3372{
79072805
LW
3373 char *s;
3374 SV *sv;
3375 GV* tmpgv;
9cbac4c7 3376#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
516a5887 3377 char **dup_env_base = 0;
103a7189 3378 int dup_env_count = 0;
9cbac4c7 3379#endif
fe14fcc3 3380
79072805 3381 argc--,argv++; /* skip name of script */
3280af22 3382 if (PL_doswitches) {
79072805
LW
3383 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3384 if (!argv[0][1])
3385 break;
379d538a 3386 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW
3387 argc--,argv++;
3388 break;
3389 }
155aba94 3390 if ((s = strchr(argv[0], '='))) {
79072805 3391 *s++ = '\0';
85e6fe83 3392 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW
3393 }
3394 else
85e6fe83 3395 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3396 }
79072805 3397 }
3280af22
NIS
3398 PL_toptarget = NEWSV(0,0);
3399 sv_upgrade(PL_toptarget, SVt_PVFM);
3400 sv_setpvn(PL_toptarget, "", 0);
3401 PL_bodytarget = NEWSV(0,0);
3402 sv_upgrade(PL_bodytarget, SVt_PVFM);
3403 sv_setpvn(PL_bodytarget, "", 0);
3404 PL_formtarget = PL_bodytarget;
79072805 3405
bbce6d69 3406 TAINT;
155aba94 3407 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS
3408#ifdef MACOS_TRADITIONAL
3409 /* $0 is not majick on a Mac */
3410 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3411#else
3280af22 3412 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3413 magicname("0", "0", 1);
bf4acbe4 3414#endif
79072805 3415 }
155aba94 3416 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV)))
ed344e4f 3417#ifdef OS2
23da6c43 3418 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
ed344e4f 3419#else
3280af22 3420 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
ed344e4f 3421#endif
155aba94 3422 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3280af22
NIS
3423 GvMULTI_on(PL_argvgv);
3424 (void)gv_AVadd(PL_argvgv);
3425 av_clear(GvAVn(PL_argvgv));
79072805 3426 for (; argc > 0; argc--,argv++) {
729a02f2
GS
3427 SV *sv = newSVpv(argv[0],0);
3428 av_push(GvAVn(PL_argvgv),sv);
3429 if (PL_widesyscalls)
e84ff256 3430 (void)sv_utf8_decode(sv);
79072805
LW
3431 }
3432 }
155aba94 3433 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
79072805 3434 HV *hv;
3280af22
NIS
3435 GvMULTI_on(PL_envgv);
3436 hv = GvHVn(PL_envgv);
14befaf4 3437 hv_magic(hv, Nullgv, PERL_MAGIC_env);
fa6a1c44 3438#ifdef USE_ENVIRON_ARRAY
4633a7c4
LW
3439 /* Note that if the supplied env parameter is actually a copy
3440 of the global environ then it may now point to free'd memory
3441 if the environment has been modified since. To avoid this
3442 problem we treat env==NULL as meaning 'use the default'
3443 */
3444 if (!env)
3445 env = environ;
5aabfad6 3446 if (env != environ)
79072805 3447 environ[0] = Nullch;
103a7189
JH
3448#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
3449 {
3450 char **env_base;
9041c2e3 3451 for (env_base = env; *env; env++)
103a7189
JH
3452 dup_env_count++;
3453 if ((dup_env_base = (char **)
480bfd1e 3454 safesysmalloc( sizeof(char *) * (dup_env_count+1) ))) {
103a7189
JH
3455 char **dup_env;
3456 for (env = env_base, dup_env = dup_env_base;
3457 *env;
480bfd1e
JH
3458 env++, dup_env++) {