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CommitLineData
a0d0e21e
LW
1/* perl.c
2 *
bc89e66f 3 * Copyright (c) 1987-2001 Larry Wall
a687059c 4 *
352d5a3a
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5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
a687059c 7 *
8d063cd8
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8 */
9
a0d0e21e
LW
10/*
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
12 */
45d8adaa 13
378cc40b 14#include "EXTERN.h"
864dbfa3 15#define PERL_IN_PERL_C
378cc40b 16#include "perl.h"
e3321bb0 17#include "patchlevel.h" /* for local_patches */
378cc40b 18
df5cef82 19/* XXX If this causes problems, set i_unistd=undef in the hint file. */
a0d0e21e
LW
20#ifdef I_UNISTD
21#include <unistd.h>
22#endif
a0d0e21e 23
7114a2d2 24#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
20ce7b12 25char *getenv (char *); /* Usually in <stdlib.h> */
54310121
PP
26#endif
27
acfe0abc 28static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
0cb96387 29
a687059c
LW
30#ifdef IAMSUID
31#ifndef DOSUID
32#define DOSUID
33#endif
34#endif
378cc40b 35
a687059c
LW
36#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
37#ifdef DOSUID
38#undef DOSUID
39#endif
40#endif
8d063cd8 41
4d1ff10f 42#if defined(USE_5005THREADS)
06d86050
GS
43# define INIT_TLS_AND_INTERP \
44 STMT_START { \
45 if (!PL_curinterp) { \
46 PERL_SET_INTERP(my_perl); \
47 INIT_THREADS; \
48 ALLOC_THREAD_KEY; \
49 } \
50 } STMT_END
51#else
52# if defined(USE_ITHREADS)
53# define INIT_TLS_AND_INTERP \
54 STMT_START { \
55 if (!PL_curinterp) { \
56 PERL_SET_INTERP(my_perl); \
57 INIT_THREADS; \
58 ALLOC_THREAD_KEY; \
534825c4
GS
59 PERL_SET_THX(my_perl); \
60 OP_REFCNT_INIT; \
61 } \
62 else { \
63 PERL_SET_THX(my_perl); \
06d86050 64 } \
06d86050
GS
65 } STMT_END
66# else
67# define INIT_TLS_AND_INTERP \
68 STMT_START { \
69 if (!PL_curinterp) { \
70 PERL_SET_INTERP(my_perl); \
71 } \
72 PERL_SET_THX(my_perl); \
73 } STMT_END
74# endif
75#endif
76
32e30700
GS
77#ifdef PERL_IMPLICIT_SYS
78PerlInterpreter *
7766f137
GS
79perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
80 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
32e30700
GS
81 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
82 struct IPerlDir* ipD, struct IPerlSock* ipS,
83 struct IPerlProc* ipP)
84{
85 PerlInterpreter *my_perl;
32e30700
GS
86 /* New() needs interpreter, so call malloc() instead */
87 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 88 INIT_TLS_AND_INTERP;
32e30700
GS
89 Zero(my_perl, 1, PerlInterpreter);
90 PL_Mem = ipM;
7766f137
GS
91 PL_MemShared = ipMS;
92 PL_MemParse = ipMP;
32e30700
GS
93 PL_Env = ipE;
94 PL_StdIO = ipStd;
95 PL_LIO = ipLIO;
96 PL_Dir = ipD;
97 PL_Sock = ipS;
98 PL_Proc = ipP;
7766f137 99
32e30700
GS
100 return my_perl;
101}
102#else
954c1994
GS
103
104/*
105=for apidoc perl_alloc
106
107Allocates a new Perl interpreter. See L<perlembed>.
108
109=cut
110*/
111
93a17b20 112PerlInterpreter *
cea2e8a9 113perl_alloc(void)
79072805 114{
cea2e8a9 115 PerlInterpreter *my_perl;
79072805 116
54aff467 117 /* New() needs interpreter, so call malloc() instead */
e8ee3774 118 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 119
06d86050 120 INIT_TLS_AND_INTERP;
dedcbb81 121 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 122 return my_perl;
79072805 123}
32e30700 124#endif /* PERL_IMPLICIT_SYS */
79072805 125
954c1994
GS
126/*
127=for apidoc perl_construct
128
129Initializes a new Perl interpreter. See L<perlembed>.
130
131=cut
132*/
133
79072805 134void
0cb96387 135perl_construct(pTHXx)
79072805 136{
4d1ff10f 137#ifdef USE_5005THREADS
a863c7d1 138#ifndef FAKE_THREADS
e1f15930 139 struct perl_thread *thr = NULL;
a863c7d1 140#endif /* FAKE_THREADS */
4d1ff10f 141#endif /* USE_5005THREADS */
ba869deb 142
8990e307 143#ifdef MULTIPLICITY
54aff467 144 init_interp();
ac27b0f5 145 PL_perl_destruct_level = 1;
54aff467
GS
146#else
147 if (PL_perl_destruct_level > 0)
148 init_interp();
149#endif
150
33f46ff6 151 /* Init the real globals (and main thread)? */
3280af22 152 if (!PL_linestr) {
4d1ff10f 153#ifdef USE_5005THREADS
533c011a 154 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB
155 /*
156 * Safe to use basic SV functions from now on (though
157 * not things like mortals or tainting yet).
158 */
533c011a
NIS
159 MUTEX_INIT(&PL_eval_mutex);
160 COND_INIT(&PL_eval_cond);
161 MUTEX_INIT(&PL_threads_mutex);
162 COND_INIT(&PL_nthreads_cond);
ba869deb 163# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 164 MUTEX_INIT(&PL_svref_mutex);
ba869deb 165# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 166
5ff3f7a4 167 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS
168 MUTEX_INIT(&PL_sv_lock_mutex);
169 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 170
199100c8 171 thr = init_main_thread();
4d1ff10f 172#endif /* USE_5005THREADS */
11343788 173
14dd3ad8 174#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 175 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 176#endif
312caa8e 177
2aea9f8a
GS
178 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
179
3280af22
NIS
180 PL_linestr = NEWSV(65,79);
181 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 182
3280af22 183 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP
184 /* set read-only and try to insure than we wont see REFCNT==0
185 very often */
186
3280af22
NIS
187 SvREADONLY_on(&PL_sv_undef);
188 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 189
3280af22
NIS
190 sv_setpv(&PL_sv_no,PL_No);
191 SvNV(&PL_sv_no);
192 SvREADONLY_on(&PL_sv_no);
193 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 194
3280af22
NIS
195 sv_setpv(&PL_sv_yes,PL_Yes);
196 SvNV(&PL_sv_yes);
197 SvREADONLY_on(&PL_sv_yes);
198 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 199 }
79072805 200
cea2e8a9 201 PL_sighandlerp = Perl_sighandler;
3280af22 202 PL_pidstatus = newHV();
44a8e56a 203
79072805
LW
204#ifdef MSDOS
205 /*
206 * There is no way we can refer to them from Perl so close them to save
207 * space. The other alternative would be to provide STDAUX and STDPRN
208 * filehandles.
209 */
2b96b0a5
JH
210 (void)PerlIO_close(PerlIO_importFILE(stdaux, 0));
211 (void)PerlIO_close(PerlIO_importFILE(stdprn, 0));
79072805
LW
212#endif
213 }
214
8bfdd7d9 215 PL_rs = newSVpvn("\n", 1);
dc92893f 216
cea2e8a9 217 init_stacks();
79072805 218
748a9306 219 init_ids();
3280af22 220 PL_lex_state = LEX_NOTPARSING;
a5f75d66 221
312caa8e 222 JMPENV_BOOTSTRAP;
f86702cc
PP
223 STATUS_ALL_SUCCESS;
224
0672f40e 225 init_i18nl10n(1);
36477c24 226 SET_NUMERIC_STANDARD();
0b5b802d 227
a7cb1f99
GS
228 {
229 U8 *s;
230 PL_patchlevel = NEWSV(0,4);
155aba94 231 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 232 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 233 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 234 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS
235 /* Build version strings using "native" characters */
236 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
237 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
238 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS
239 *s = '\0';
240 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
241 SvPOK_on(PL_patchlevel);
242 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
243 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 244#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 245 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 246#endif
a7cb1f99
GS
247 ;
248 SvNOK_on(PL_patchlevel); /* dual valued */
249 SvUTF8_on(PL_patchlevel);
250 SvREADONLY_on(PL_patchlevel);
251 }
79072805 252
ab821d7f 253#if defined(LOCAL_PATCH_COUNT)
3280af22 254 PL_localpatches = local_patches; /* For possible -v */
ab821d7f
PP
255#endif
256
52853b95
GS
257#ifdef HAVE_INTERP_INTERN
258 sys_intern_init();
259#endif
260
3a1ee7e8 261 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 262
3280af22
NIS
263 PL_fdpid = newAV(); /* for remembering popen pids by fd */
264 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 265 PL_errors = newSVpvn("",0);
1fcf4c12 266#ifdef USE_ITHREADS
13137afc
AB
267 PL_regex_padav = newAV();
268 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
269 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 270#endif
e5dd39fc
AB
271#ifdef USE_REENTRANT_API
272 New(31337, PL_reentrant_buffer,1, REBUF);
273 New(31337, PL_reentrant_buffer->tmbuff,1, struct tm);
274#endif
3d47000e
AB
275
276 /* Note that strtab is a rather special HV. Assumptions are made
277 about not iterating on it, and not adding tie magic to it.
278 It is properly deallocated in perl_destruct() */
279 PL_strtab = newHV();
280
281#ifdef USE_5005THREADS
282 MUTEX_INIT(&PL_strtab_mutex);
283#endif
284 HvSHAREKEYS_off(PL_strtab); /* mandatory */
285 hv_ksplit(PL_strtab, 512);
286
0631ea03
AB
287#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
288 _dyld_lookup_and_bind
289 ("__environ", (unsigned long *) &environ_pointer, NULL);
290#endif /* environ */
291
292#ifdef USE_ENVIRON_ARRAY
293 PL_origenviron = environ;
294#endif
295
8990e307 296 ENTER;
79072805
LW
297}
298
954c1994
GS
299/*
300=for apidoc perl_destruct
301
302Shuts down a Perl interpreter. See L<perlembed>.
303
304=cut
305*/
306
31d77e54 307int
0cb96387 308perl_destruct(pTHXx)
79072805 309{
7c474504 310 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 311 HV *hv;
4d1ff10f 312#ifdef USE_5005THREADS
33f46ff6 313 Thread t;
cea2e8a9 314 dTHX;
4d1ff10f 315#endif /* USE_5005THREADS */
8990e307 316
7766f137
GS
317 /* wait for all pseudo-forked children to finish */
318 PERL_WAIT_FOR_CHILDREN;
319
4d1ff10f 320#ifdef USE_5005THREADS
0f15f207 321#ifndef FAKE_THREADS
8023c3ce
MB
322 /* Pass 1 on any remaining threads: detach joinables, join zombies */
323 retry_cleanup:
533c011a 324 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 325 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 326 "perl_destruct: waiting for %d threads...\n",
533c011a 327 PL_nthreads - 1));
33f46ff6 328 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB
329 MUTEX_LOCK(&t->mutex);
330 switch (ThrSTATE(t)) {
331 AV *av;
c7848ba1 332 case THRf_ZOMBIE:
bf49b057 333 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 334 "perl_destruct: joining zombie %p\n", t));
605e5515
MB
335 ThrSETSTATE(t, THRf_DEAD);
336 MUTEX_UNLOCK(&t->mutex);
533c011a 337 PL_nthreads--;
8023c3ce
MB
338 /*
339 * The SvREFCNT_dec below may take a long time (e.g. av
340 * may contain an object scalar whose destructor gets
341 * called) so we have to unlock threads_mutex and start
342 * all over again.
343 */
533c011a 344 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 345 JOIN(t, &av);
605e5515 346 SvREFCNT_dec((SV*)av);
bf49b057 347 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 348 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 349 goto retry_cleanup;
c7848ba1 350 case THRf_R_JOINABLE:
bf49b057 351 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
352 "perl_destruct: detaching thread %p\n", t));
353 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 354 /*
c7848ba1
MB
355 * We unlock threads_mutex and t->mutex in the opposite order
356 * from which we locked them just so that DETACH won't
357 * deadlock if it panics. It's only a breach of good style
358 * not a bug since they are unlocks not locks.
359 */
533c011a 360 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB
361 DETACH(t);
362 MUTEX_UNLOCK(&t->mutex);
8023c3ce 363 goto retry_cleanup;
c7848ba1 364 default:
bf49b057 365 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
366 "perl_destruct: ignoring %p (state %u)\n",
367 t, ThrSTATE(t)));
368 MUTEX_UNLOCK(&t->mutex);
c7848ba1 369 /* fall through and out */
33f46ff6
MB
370 }
371 }
8023c3ce
MB
372 /* We leave the above "Pass 1" loop with threads_mutex still locked */
373
374 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 375 while (PL_nthreads > 1)
11343788 376 {
bf49b057 377 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 378 "perl_destruct: final wait for %d threads\n",
533c011a
NIS
379 PL_nthreads - 1));
380 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB
381 }
382 /* At this point, we're the last thread */
533c011a 383 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 384 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS
385 MUTEX_DESTROY(&PL_threads_mutex);
386 COND_DESTROY(&PL_nthreads_cond);
b57a092c 387 PL_nthreads--;
0f15f207 388#endif /* !defined(FAKE_THREADS) */
4d1ff10f 389#endif /* USE_5005THREADS */
11343788 390
3280af22 391 destruct_level = PL_perl_destruct_level;
4633a7c4
LW
392#ifdef DEBUGGING
393 {
394 char *s;
155aba94 395 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc
PP
396 int i = atoi(s);
397 if (destruct_level < i)
398 destruct_level = i;
399 }
4633a7c4
LW
400 }
401#endif
402
31d77e54
AB
403
404 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB
405 dJMPENV;
406 int x = 0;
407
408 JMPENV_PUSH(x);
409 if (PL_endav && !PL_minus_c)
410 call_list(PL_scopestack_ix, PL_endav);
411 JMPENV_POP;
26f423df 412 }
f3faeb53 413 LEAVE;
a0d0e21e
LW
414 FREETMPS;
415
ff0cee69
PP
416 /* We must account for everything. */
417
418 /* Destroy the main CV and syntax tree */
3280af22
NIS
419 if (PL_main_root) {
420 PL_curpad = AvARRAY(PL_comppad);
421 op_free(PL_main_root);
422 PL_main_root = Nullop;
a0d0e21e 423 }
3280af22
NIS
424 PL_curcop = &PL_compiling;
425 PL_main_start = Nullop;
426 SvREFCNT_dec(PL_main_cv);
427 PL_main_cv = Nullcv;
24d3c518 428 PL_dirty = TRUE;
ff0cee69 429
13621cfb
NIS
430 /* Tell PerlIO we are about to tear things apart in case
431 we have layers which are using resources that should
432 be cleaned up now.
433 */
434
435 PerlIO_destruct(aTHX);
436
3280af22 437 if (PL_sv_objcount) {
a0d0e21e
LW
438 /*
439 * Try to destruct global references. We do this first so that the
440 * destructors and destructees still exist. Some sv's might remain.
441 * Non-referenced objects are on their own.
442 */
a0d0e21e 443 sv_clean_objs();
8990e307
LW
444 }
445
5cd24f17 446 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
447 SvREFCNT_dec(PL_warnhook);
448 PL_warnhook = Nullsv;
449 SvREFCNT_dec(PL_diehook);
450 PL_diehook = Nullsv;
5cd24f17 451
4b556e6c 452 /* call exit list functions */
3280af22 453 while (PL_exitlistlen-- > 0)
acfe0abc 454 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 455
3280af22 456 Safefree(PL_exitlist);
4b556e6c 457
a0d0e21e 458 if (destruct_level == 0){
8990e307 459
a0d0e21e 460 DEBUG_P(debprofdump());
ac27b0f5 461
56a2bab7
NIS
462#if defined(PERLIO_LAYERS)
463 /* No more IO - including error messages ! */
464 PerlIO_cleanup(aTHX);
465#endif
466
a0d0e21e 467 /* The exit() function will do everything that needs doing. */
31d77e54 468 return STATUS_NATIVE_EXPORT;;
a0d0e21e 469 }
5dd60ef7 470
551a8b83 471 /* jettison our possibly duplicated environment */
4b647fb0
DM
472 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
473 * so we certainly shouldn't free it here
474 */
475#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
551a8b83
JH
476 if (environ != PL_origenviron) {
477 I32 i;
478
479 for (i = 0; environ[i]; i++)
4b420006 480 safesysfree(environ[i]);
0631ea03 481
4b420006
JH
482 /* Must use safesysfree() when working with environ. */
483 safesysfree(environ);
551a8b83
JH
484
485 environ = PL_origenviron;
486 }
487#endif
488
5f8cb046
DM
489#ifdef USE_ITHREADS
490 /* the syntax tree is shared between clones
491 * so op_free(PL_main_root) only ReREFCNT_dec's
492 * REGEXPs in the parent interpreter
493 * we need to manually ReREFCNT_dec for the clones
494 */
495 {
496 I32 i = AvFILLp(PL_regex_padav) + 1;
497 SV **ary = AvARRAY(PL_regex_padav);
498
499 while (i) {
35061a7e 500 SV *resv = ary[--i];
ba89bb6e 501 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM
502
503 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 504 /* this is PL_reg_curpm, already freed
35061a7e
DM
505 * flag is set in regexec.c:S_regtry
506 */
507 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 508 }
1cc8b4c5
AB
509 else if(SvREPADTMP(resv)) {
510 SvREPADTMP_off(resv);
511 }
35061a7e 512 else {
5f8cb046
DM
513 ReREFCNT_dec(re);
514 }
515 }
516 }
517 SvREFCNT_dec(PL_regex_padav);
518 PL_regex_padav = Nullav;
519 PL_regex_pad = NULL;
520#endif
521
5f05dabc
PP
522 /* loosen bonds of global variables */
523
3280af22
NIS
524 if(PL_rsfp) {
525 (void)PerlIO_close(PL_rsfp);
526 PL_rsfp = Nullfp;
8ebc5c01
PP
527 }
528
529 /* Filters for program text */
3280af22
NIS
530 SvREFCNT_dec(PL_rsfp_filters);
531 PL_rsfp_filters = Nullav;
8ebc5c01
PP
532
533 /* switches */
3280af22
NIS
534 PL_preprocess = FALSE;
535 PL_minus_n = FALSE;
536 PL_minus_p = FALSE;
537 PL_minus_l = FALSE;
538 PL_minus_a = FALSE;
539 PL_minus_F = FALSE;
540 PL_doswitches = FALSE;
599cee73 541 PL_dowarn = G_WARN_OFF;
3280af22
NIS
542 PL_doextract = FALSE;
543 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
544 PL_unsafe = FALSE;
545
546 Safefree(PL_inplace);
547 PL_inplace = Nullch;
a7cb1f99 548 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
549
550 if (PL_e_script) {
551 SvREFCNT_dec(PL_e_script);
552 PL_e_script = Nullsv;
8ebc5c01
PP
553 }
554
bc0a45ed
DM
555 while (--PL_origargc >= 0) {
556 Safefree(PL_origargv[PL_origargc]);
557 }
558 Safefree(PL_origargv);
559
8ebc5c01
PP
560 /* magical thingies */
561
7889fe52
NIS
562 SvREFCNT_dec(PL_ofs_sv); /* $, */
563 PL_ofs_sv = Nullsv;
5f05dabc 564
7889fe52
NIS
565 SvREFCNT_dec(PL_ors_sv); /* $\ */
566 PL_ors_sv = Nullsv;
8ebc5c01 567
3280af22
NIS
568 SvREFCNT_dec(PL_rs); /* $/ */
569 PL_rs = Nullsv;
dc92893f 570
d33b2eba
GS
571 PL_multiline = 0; /* $* */
572 Safefree(PL_osname); /* $^O */
573 PL_osname = Nullch;
5f05dabc 574
3280af22
NIS
575 SvREFCNT_dec(PL_statname);
576 PL_statname = Nullsv;
577 PL_statgv = Nullgv;
5f05dabc 578
8ebc5c01
PP
579 /* defgv, aka *_ should be taken care of elsewhere */
580
8ebc5c01 581 /* clean up after study() */
3280af22
NIS
582 SvREFCNT_dec(PL_lastscream);
583 PL_lastscream = Nullsv;
584 Safefree(PL_screamfirst);
585 PL_screamfirst = 0;
586 Safefree(PL_screamnext);
587 PL_screamnext = 0;
8ebc5c01 588
7d5ea4e7
GS
589 /* float buffer */
590 Safefree(PL_efloatbuf);
591 PL_efloatbuf = Nullch;
592 PL_efloatsize = 0;
593
8ebc5c01 594 /* startup and shutdown function lists */
3280af22 595 SvREFCNT_dec(PL_beginav);
5a837c8f 596 SvREFCNT_dec(PL_beginav_save);
3280af22 597 SvREFCNT_dec(PL_endav);
7d30b5c4 598 SvREFCNT_dec(PL_checkav);
3280af22
NIS
599 SvREFCNT_dec(PL_initav);
600 PL_beginav = Nullav;
5a837c8f 601 PL_beginav_save = Nullav;
3280af22 602 PL_endav = Nullav;
7d30b5c4 603 PL_checkav = Nullav;
3280af22 604 PL_initav = Nullav;
5618dfe8 605
8ebc5c01 606 /* shortcuts just get cleared */
3280af22 607 PL_envgv = Nullgv;
3280af22
NIS
608 PL_incgv = Nullgv;
609 PL_hintgv = Nullgv;
610 PL_errgv = Nullgv;
611 PL_argvgv = Nullgv;
612 PL_argvoutgv = Nullgv;
613 PL_stdingv = Nullgv;
bf49b057 614 PL_stderrgv = Nullgv;
3280af22
NIS
615 PL_last_in_gv = Nullgv;
616 PL_replgv = Nullgv;
5c831c24 617 PL_debstash = Nullhv;
8ebc5c01
PP
618
619 /* reset so print() ends up where we expect */
620 setdefout(Nullgv);
5c831c24 621
7a1c5554
GS
622 SvREFCNT_dec(PL_argvout_stack);
623 PL_argvout_stack = Nullav;
8ebc5c01 624
5c831c24
GS
625 SvREFCNT_dec(PL_modglobal);
626 PL_modglobal = Nullhv;
627 SvREFCNT_dec(PL_preambleav);
628 PL_preambleav = Nullav;
629 SvREFCNT_dec(PL_subname);
630 PL_subname = Nullsv;
631 SvREFCNT_dec(PL_linestr);
632 PL_linestr = Nullsv;
633 SvREFCNT_dec(PL_pidstatus);
634 PL_pidstatus = Nullhv;
635 SvREFCNT_dec(PL_toptarget);
636 PL_toptarget = Nullsv;
637 SvREFCNT_dec(PL_bodytarget);
638 PL_bodytarget = Nullsv;
639 PL_formtarget = Nullsv;
640
d33b2eba 641 /* free locale stuff */
b9582b6a 642#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
643 Safefree(PL_collation_name);
644 PL_collation_name = Nullch;
b9582b6a 645#endif
d33b2eba 646
b9582b6a 647#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
648 Safefree(PL_numeric_name);
649 PL_numeric_name = Nullch;
a453c169 650 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 651#endif
d33b2eba 652
5c831c24
GS
653 /* clear utf8 character classes */
654 SvREFCNT_dec(PL_utf8_alnum);
655 SvREFCNT_dec(PL_utf8_alnumc);
656 SvREFCNT_dec(PL_utf8_ascii);
657 SvREFCNT_dec(PL_utf8_alpha);
658 SvREFCNT_dec(PL_utf8_space);
659 SvREFCNT_dec(PL_utf8_cntrl);
660 SvREFCNT_dec(PL_utf8_graph);
661 SvREFCNT_dec(PL_utf8_digit);
662 SvREFCNT_dec(PL_utf8_upper);
663 SvREFCNT_dec(PL_utf8_lower);
664 SvREFCNT_dec(PL_utf8_print);
665 SvREFCNT_dec(PL_utf8_punct);
666 SvREFCNT_dec(PL_utf8_xdigit);
667 SvREFCNT_dec(PL_utf8_mark);
668 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 669 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 670 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 671 SvREFCNT_dec(PL_utf8_tofold);
5c831c24
GS
672 PL_utf8_alnum = Nullsv;
673 PL_utf8_alnumc = Nullsv;
674 PL_utf8_ascii = Nullsv;
675 PL_utf8_alpha = Nullsv;
676 PL_utf8_space = Nullsv;
677 PL_utf8_cntrl = Nullsv;
678 PL_utf8_graph = Nullsv;
679 PL_utf8_digit = Nullsv;
680 PL_utf8_upper = Nullsv;
681 PL_utf8_lower = Nullsv;
682 PL_utf8_print = Nullsv;
683 PL_utf8_punct = Nullsv;
684 PL_utf8_xdigit = Nullsv;
685 PL_utf8_mark = Nullsv;
686 PL_utf8_toupper = Nullsv;
687 PL_utf8_totitle = Nullsv;
688 PL_utf8_tolower = Nullsv;
b4e400f9 689 PL_utf8_tofold = Nullsv;
5c831c24 690
971a9dd3
GS
691 if (!specialWARN(PL_compiling.cop_warnings))
692 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 693 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
694 if (!specialCopIO(PL_compiling.cop_io))
695 SvREFCNT_dec(PL_compiling.cop_io);
696 PL_compiling.cop_io = Nullsv;
f4dd75d9
GS
697#ifdef USE_ITHREADS
698 Safefree(CopFILE(&PL_compiling));
699 CopFILE(&PL_compiling) = Nullch;
700 Safefree(CopSTASHPV(&PL_compiling));
701#else
01724ea0 702 SvREFCNT_dec(CopFILEGV(&PL_compiling));
f4dd75d9
GS
703 CopFILEGV(&PL_compiling) = Nullgv;
704 /* cop_stash is not refcounted */
01724ea0 705#endif
5c831c24 706
a0d0e21e 707 /* Prepare to destruct main symbol table. */
5f05dabc 708
3280af22
NIS
709 hv = PL_defstash;
710 PL_defstash = 0;
a0d0e21e 711 SvREFCNT_dec(hv);
5c831c24
GS
712 SvREFCNT_dec(PL_curstname);
713 PL_curstname = Nullsv;
a0d0e21e 714
5a844595
GS
715 /* clear queued errors */
716 SvREFCNT_dec(PL_errors);
717 PL_errors = Nullsv;
718
a0d0e21e 719 FREETMPS;
0453d815 720 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 721 if (PL_scopestack_ix != 0)
0453d815
PM
722 Perl_warner(aTHX_ WARN_INTERNAL,
723 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
724 (long)PL_scopestack_ix);
725 if (PL_savestack_ix != 0)
0453d815
PM
726 Perl_warner(aTHX_ WARN_INTERNAL,
727 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
728 (long)PL_savestack_ix);
729 if (PL_tmps_floor != -1)
0453d815 730 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 731 (long)PL_tmps_floor + 1);
a0d0e21e 732 if (cxstack_ix != -1)
0453d815 733 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 734 (long)cxstack_ix + 1);
a0d0e21e 735 }
8990e307
LW
736
737 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 738 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 739 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
740
741 /* the 2 is for PL_fdpid and PL_strtab */
742 while (PL_sv_count > 2 && sv_clean_all())
743 ;
744
d33b2eba
GS
745 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
746 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
747 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
748 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 749
d4777f27
GS
750 AvREAL_off(PL_fdpid); /* no surviving entries */
751 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
752 PL_fdpid = Nullav;
753
6c644e78
GS
754#ifdef HAVE_INTERP_INTERN
755 sys_intern_clear();
756#endif
757
6e72f9df
PP
758 /* Destruct the global string table. */
759 {
760 /* Yell and reset the HeVAL() slots that are still holding refcounts,
761 * so that sv_free() won't fail on them.
762 */
763 I32 riter;
764 I32 max;
765 HE *hent;
766 HE **array;
767
768 riter = 0;
3280af22
NIS
769 max = HvMAX(PL_strtab);
770 array = HvARRAY(PL_strtab);
6e72f9df
PP
771 hent = array[0];
772 for (;;) {
0453d815
PM
773 if (hent && ckWARN_d(WARN_INTERNAL)) {
774 Perl_warner(aTHX_ WARN_INTERNAL,
775 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
776 HeVAL(hent) - Nullsv, HeKEY(hent));
777 HeVAL(hent) = Nullsv;
778 hent = HeNEXT(hent);
779 }
780 if (!hent) {
781 if (++riter > max)
782 break;
783 hent = array[riter];
784 }
785 }
786 }
3280af22 787 SvREFCNT_dec(PL_strtab);
6e72f9df 788
e652bb2f 789#ifdef USE_ITHREADS
a0739874
DM
790 /* free the pointer table used for cloning */
791 ptr_table_free(PL_ptr_table);
53186e96 792#endif
a0739874 793
d33b2eba
GS
794 /* free special SVs */
795
796 SvREFCNT(&PL_sv_yes) = 0;
797 sv_clear(&PL_sv_yes);
798 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 799 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
800
801 SvREFCNT(&PL_sv_no) = 0;
802 sv_clear(&PL_sv_no);
803 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 804 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS
805
806 SvREFCNT(&PL_sv_undef) = 0;
807 SvREADONLY_off(&PL_sv_undef);
d33b2eba 808
0453d815
PM
809 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
810 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 811
56a2bab7 812#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
813 /* No more IO - including error messages ! */
814 PerlIO_cleanup(aTHX);
815#endif
816
3280af22 817 Safefree(PL_origfilename);
3280af22 818 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ
819 if (PL_reg_curpm)
820 Safefree(PL_reg_curpm);
82ba1be6 821 Safefree(PL_reg_poscache);
3280af22
NIS
822 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
823 Safefree(PL_op_mask);
cf36064f
GS
824 Safefree(PL_psig_ptr);
825 Safefree(PL_psig_name);
2c2666fc 826 Safefree(PL_bitcount);
ce08f86c 827 Safefree(PL_psig_pend);
6e72f9df 828 nuke_stacks();
3280af22 829 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 830
a0d0e21e 831 DEBUG_P(debprofdump());
4d1ff10f 832#ifdef USE_5005THREADS
5f08fbcd 833 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS
834 MUTEX_DESTROY(&PL_sv_mutex);
835 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 836 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 837 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 838 COND_DESTROY(&PL_eval_cond);
11d617a5
GS
839#ifdef EMULATE_ATOMIC_REFCOUNTS
840 MUTEX_DESTROY(&PL_svref_mutex);
841#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 842
8023c3ce 843 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS
844 Safefree(SvPVX(PL_thrsv));
845 Safefree(SvANY(PL_thrsv));
846 Safefree(PL_thrsv);
847 PL_thrsv = Nullsv;
4d1ff10f 848#endif /* USE_5005THREADS */
d33b2eba 849
e5dd39fc
AB
850#ifdef USE_REENTRANT_API
851 Safefree(PL_reentrant_buffer->tmbuff);
852 Safefree(PL_reentrant_buffer);
853#endif
854
612f20c3
GS
855 sv_free_arenas();
856
fc36a67e
PP
857 /* As the absolutely last thing, free the non-arena SV for mess() */
858
3280af22 859 if (PL_mess_sv) {
9c63abab
GS
860 /* it could have accumulated taint magic */
861 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
862 MAGIC* mg;
863 MAGIC* moremagic;
864 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
865 moremagic = mg->mg_moremagic;
14befaf4
DM
866 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
867 && mg->mg_len >= 0)
9c63abab
GS
868 Safefree(mg->mg_ptr);
869 Safefree(mg);
870 }
871 }
fc36a67e 872 /* we know that type >= SVt_PV */
155aba94 873 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS
874 Safefree(SvPVX(PL_mess_sv));
875 Safefree(SvANY(PL_mess_sv));
876 Safefree(PL_mess_sv);
877 PL_mess_sv = Nullsv;
fc36a67e 878 }
31d77e54 879 return STATUS_NATIVE_EXPORT;
79072805
LW
880}
881
954c1994
GS
882/*
883=for apidoc perl_free
884
885Releases a Perl interpreter. See L<perlembed>.
886
887=cut
888*/
889
79072805 890void
0cb96387 891perl_free(pTHXx)
79072805 892{
acfe0abc 893#if defined(WIN32) || defined(NETWARE)
ce3e5b80 894# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
895# ifdef NETWARE
896 void *host = nw_internal_host;
897# else
898 void *host = w32_internal_host;
899# endif
ce3e5b80 900 PerlMem_free(aTHXx);
acfe0abc
GS
901# ifdef NETWARE
902 nw5_delete_internal_host(host);
903# else
904 win32_delete_internal_host(host);
905# endif
1c0ca838
GS
906# else
907 PerlMem_free(aTHXx);
908# endif
acfe0abc
GS
909#else
910 PerlMem_free(aTHXx);
76e3520e 911#endif
79072805
LW
912}
913
4b556e6c 914void
864dbfa3 915Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 916{
3280af22
NIS
917 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
918 PL_exitlist[PL_exitlistlen].fn = fn;
919 PL_exitlist[PL_exitlistlen].ptr = ptr;
920 ++PL_exitlistlen;
4b556e6c
JD
921}
922
954c1994
GS
923/*
924=for apidoc perl_parse
925
926Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
927
928=cut
929*/
930
79072805 931int
0cb96387 932perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 933{
6224f72b 934 I32 oldscope;
6224f72b 935 int ret;
db36c5a1 936 dJMPENV;
4d1ff10f 937#ifdef USE_5005THREADS
cea2e8a9
GS
938 dTHX;
939#endif
8d063cd8 940
a687059c
LW
941#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
942#ifdef IAMSUID
943#undef IAMSUID
cea2e8a9 944 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW
945setuid perl scripts securely.\n");
946#endif
947#endif
948
3280af22 949 PL_origargc = argc;
bc0a45ed
DM
950 {
951 /* we copy rather than point to argv
952 * since perl_clone will copy and perl_destruct
3a1ee7e8 953 * has no way of knowing if we've made a copy or
bc0a45ed
DM
954 * just point to argv
955 */
956 int i = PL_origargc;
957 New(0, PL_origargv, i+1, char*);
958 PL_origargv[i] = '\0';
959 while (i-- > 0) {
960 PL_origargv[i] = savepv(argv[i]);
961 }
962 }
963
0631ea03 964
a0d0e21e 965
3280af22 966 if (PL_do_undump) {
a0d0e21e
LW
967
968 /* Come here if running an undumped a.out. */
969
3280af22
NIS
970 PL_origfilename = savepv(argv[0]);
971 PL_do_undump = FALSE;
a0d0e21e 972 cxstack_ix = -1; /* start label stack again */
748a9306 973 init_ids();
a0d0e21e
LW
974 init_postdump_symbols(argc,argv,env);
975 return 0;
976 }
977
3280af22
NIS
978 if (PL_main_root) {
979 PL_curpad = AvARRAY(PL_comppad);
980 op_free(PL_main_root);
981 PL_main_root = Nullop;
ff0cee69 982 }
3280af22
NIS
983 PL_main_start = Nullop;
984 SvREFCNT_dec(PL_main_cv);
985 PL_main_cv = Nullcv;
79072805 986
3280af22
NIS
987 time(&PL_basetime);
988 oldscope = PL_scopestack_ix;
599cee73 989 PL_dowarn = G_WARN_OFF;
f86702cc 990
14dd3ad8
GS
991#ifdef PERL_FLEXIBLE_EXCEPTIONS
992 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
993#else
994 JMPENV_PUSH(ret);
995#endif
6224f72b 996 switch (ret) {
312caa8e 997 case 0:
14dd3ad8
GS
998#ifndef PERL_FLEXIBLE_EXCEPTIONS
999 parse_body(env,xsinit);
1000#endif
7d30b5c4
GS
1001 if (PL_checkav)
1002 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1003 ret = 0;
1004 break;
6224f72b
GS
1005 case 1:
1006 STATUS_ALL_FAILURE;
1007 /* FALL THROUGH */
1008 case 2:
1009 /* my_exit() was called */
3280af22 1010 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1011 LEAVE;
1012 FREETMPS;
3280af22 1013 PL_curstash = PL_defstash;
7d30b5c4
GS
1014 if (PL_checkav)
1015 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1016 ret = STATUS_NATIVE_EXPORT;
1017 break;
6224f72b 1018 case 3:
bf49b057 1019 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1020 ret = 1;
1021 break;
6224f72b 1022 }
14dd3ad8
GS
1023 JMPENV_POP;
1024 return ret;
1025}
1026
1027#ifdef PERL_FLEXIBLE_EXCEPTIONS
1028STATIC void *
1029S_vparse_body(pTHX_ va_list args)
1030{
1031 char **env = va_arg(args, char**);
1032 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1033
1034 return parse_body(env, xsinit);
312caa8e 1035}
14dd3ad8 1036#endif
312caa8e
CS
1037
1038STATIC void *
14dd3ad8 1039S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1040{
312caa8e
CS
1041 int argc = PL_origargc;
1042 char **argv = PL_origargv;
312caa8e
CS
1043 char *scriptname = NULL;
1044 int fdscript = -1;
1045 VOL bool dosearch = FALSE;
1046 char *validarg = "";
1047 AV* comppadlist;
1048 register SV *sv;
1049 register char *s;
cf756827 1050 char *cddir = Nullch;
312caa8e 1051
3280af22 1052 sv_setpvn(PL_linestr,"",0);
79cb57f6 1053 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1054 SAVEFREESV(sv);
1055 init_main_stash();
54310121 1056
6224f72b
GS
1057 for (argc--,argv++; argc > 0; argc--,argv++) {
1058 if (argv[0][0] != '-' || !argv[0][1])
1059 break;
1060#ifdef DOSUID
1061 if (*validarg)
1062 validarg = " PHOOEY ";
1063 else
1064 validarg = argv[0];
13281fa4 1065#endif
6224f72b
GS
1066 s = argv[0]+1;
1067 reswitch:
1068 switch (*s) {
729a02f2
GS
1069 case 'C':
1070#ifdef WIN32
c0932edc 1071 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS
1072 /* FALL THROUGH */
1073#endif
1d5472a9
GS
1074#ifndef PERL_STRICT_CR
1075 case '\r':
1076#endif
6224f72b
GS
1077 case ' ':
1078 case '0':
1079 case 'F':
1080 case 'a':
1081 case 'c':
1082 case 'd':
1083 case 'D':
1084 case 'h':
1085 case 'i':
1086 case 'l':
1087 case 'M':
1088 case 'm':
1089 case 'n':
1090 case 'p':
1091 case 's':
1092 case 'u':
1093 case 'U':
1094 case 'v':
599cee73
PM
1095 case 'W':
1096 case 'X':
6224f72b 1097 case 'w':
155aba94 1098 if ((s = moreswitches(s)))
6224f72b
GS
1099 goto reswitch;
1100 break;
33b78306 1101
1dbad523
JH
1102 case 't':
1103 PL_taint_warn = TRUE;
1104 if (! (PL_dowarn & G_WARN_ALL_MASK))
1105 PL_dowarn |= G_WARN_ON;
6224f72b 1106 case 'T':
3280af22 1107 PL_tainting = TRUE;
6224f72b
GS
1108 s++;
1109 goto reswitch;
f86702cc 1110
6224f72b 1111 case 'e':
bf4acbe4
GS
1112#ifdef MACOS_TRADITIONAL
1113 /* ignore -e for Dev:Pseudo argument */
1114 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1115 break;
bf4acbe4 1116#endif
3280af22 1117 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1118 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1119 if (!PL_e_script) {
79cb57f6 1120 PL_e_script = newSVpvn("",0);
0cb96387 1121 filter_add(read_e_script, NULL);
6224f72b
GS
1122 }
1123 if (*++s)
3280af22 1124 sv_catpv(PL_e_script, s);
6224f72b 1125 else if (argv[1]) {
3280af22 1126 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1127 argc--,argv++;
1128 }
1129 else
cea2e8a9 1130 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1131 sv_catpv(PL_e_script, "\n");
6224f72b 1132 break;
afe37c7d 1133
6224f72b
GS
1134 case 'I': /* -I handled both here and in moreswitches() */
1135 forbid_setid("-I");
1136 if (!*++s && (s=argv[1]) != Nullch) {
1137 argc--,argv++;
1138 }
6224f72b 1139 if (s && *s) {
0df16ed7
GS
1140 char *p;
1141 STRLEN len = strlen(s);
1142 p = savepvn(s, len);
9c8a64f0 1143 incpush(p, TRUE, TRUE);
0df16ed7
GS
1144 sv_catpvn(sv, "-I", 2);
1145 sv_catpvn(sv, p, len);
1146 sv_catpvn(sv, " ", 1);
6224f72b 1147 Safefree(p);
0df16ed7
GS
1148 }
1149 else
a67e862a 1150 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1151 break;
1152 case 'P':
1153 forbid_setid("-P");
3280af22 1154 PL_preprocess = TRUE;
6224f72b
GS
1155 s++;
1156 goto reswitch;
1157 case 'S':
1158 forbid_setid("-S");
1159 dosearch = TRUE;
1160 s++;
1161 goto reswitch;
1162 case 'V':
3280af22
NIS
1163 if (!PL_preambleav)
1164 PL_preambleav = newAV();
1165 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1166 if (*++s != ':') {
3280af22 1167 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1168#ifdef VMS
6b88bc9c 1169 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1170#else
3280af22 1171 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1172#endif
3280af22 1173 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1174# ifdef DEBUGGING
3280af22 1175 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1176# endif
6224f72b 1177# ifdef MULTIPLICITY
8f872242 1178 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1179# endif
4d1ff10f
AB
1180# ifdef USE_5005THREADS
1181 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1182# endif
ac5e8965
JH
1183# ifdef USE_ITHREADS
1184 sv_catpv(PL_Sv," USE_ITHREADS");
1185# endif
10cc9d2a
JH
1186# ifdef USE_64_BIT_INT
1187 sv_catpv(PL_Sv," USE_64_BIT_INT");
1188# endif
1189# ifdef USE_64_BIT_ALL
1190 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1191# endif
1192# ifdef USE_LONG_DOUBLE
1193 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1194# endif
53430762
JH
1195# ifdef USE_LARGE_FILES
1196 sv_catpv(PL_Sv," USE_LARGE_FILES");
1197# endif
ac5e8965
JH
1198# ifdef USE_SOCKS
1199 sv_catpv(PL_Sv," USE_SOCKS");
1200# endif
b363f7ed
GS
1201# ifdef PERL_IMPLICIT_CONTEXT
1202 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1203# endif
1204# ifdef PERL_IMPLICIT_SYS
1205 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1206# endif
3280af22 1207 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1208
6224f72b
GS
1209#if defined(LOCAL_PATCH_COUNT)
1210 if (LOCAL_PATCH_COUNT > 0) {
1211 int i;
3280af22 1212 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1213 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1214 if (PL_localpatches[i])
cea2e8a9 1215 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS
1216 }
1217 }
1218#endif
cea2e8a9 1219 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1220#ifdef __DATE__
1221# ifdef __TIME__
cea2e8a9 1222 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1223# else
cea2e8a9 1224 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1225# endif
1226#endif
3280af22 1227 sv_catpv(PL_Sv, "; \
6224f72b 1228$\"=\"\\n \"; \
69fcd688
JH
1229@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1230#ifdef __CYGWIN__
1231 sv_catpv(PL_Sv,"\
1232push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1233#endif
1234 sv_catpv(PL_Sv, "\
6224f72b
GS
1235print \" \\%ENV:\\n @env\\n\" if @env; \
1236print \" \\@INC:\\n @INC\\n\";");
1237 }
1238 else {
3280af22
NIS
1239 PL_Sv = newSVpv("config_vars(qw(",0);
1240 sv_catpv(PL_Sv, ++s);
1241 sv_catpv(PL_Sv, "))");
6224f72b
GS
1242 s += strlen(s);
1243 }
3280af22 1244 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1245 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1246 goto reswitch;
1247 case 'x':
3280af22 1248 PL_doextract = TRUE;
6224f72b
GS
1249 s++;
1250 if (*s)
f4c556ac 1251 cddir = s;
6224f72b
GS
1252 break;
1253 case 0:
1254 break;
1255 case '-':
1256 if (!*++s || isSPACE(*s)) {
1257 argc--,argv++;
1258 goto switch_end;
1259 }
1260 /* catch use of gnu style long options */
1261 if (strEQ(s, "version")) {
1262 s = "v";
1263 goto reswitch;
1264 }
1265 if (strEQ(s, "help")) {
1266 s = "h";
1267 goto reswitch;
1268 }
1269 s--;
1270 /* FALL THROUGH */
1271 default:
cea2e8a9 1272 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1273 }
1274 }
6224f72b 1275 switch_end:
54310121 1276
f675dbe5
CB
1277 if (
1278#ifndef SECURE_INTERNAL_GETENV
1279 !PL_tainting &&
1280#endif
cf756827 1281 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1282 {
cf756827 1283 char *popt = s;
74288ac8
GS
1284 while (isSPACE(*s))
1285 s++;
1286 if (*s == '-' && *(s+1) == 'T')
1287 PL_tainting = TRUE;
1288 else {
cf756827 1289 char *popt_copy = Nullch;
74288ac8 1290 while (s && *s) {
4ea8f8fb 1291 char *d;
74288ac8
GS
1292 while (isSPACE(*s))
1293 s++;
1294 if (*s == '-') {
1295 s++;
1296 if (isSPACE(*s))
1297 continue;
1298 }
4ea8f8fb 1299 d = s;
74288ac8
GS
1300 if (!*s)
1301 break;
1c4db469 1302 if (!strchr("DIMUdmtw", *s))
cea2e8a9 1303 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1304 while (++s && *s) {
1305 if (isSPACE(*s)) {
cf756827
GS
1306 if (!popt_copy) {
1307 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1308 s = popt_copy + (s - popt);
1309 d = popt_copy + (d - popt);
1310 }
4ea8f8fb
MS
1311 *s++ = '\0';
1312 break;
1313 }
1314 }
1c4db469
RGS
1315 if (*d == 't') {
1316 PL_tainting = TRUE;
1317 PL_taint_warn = TRUE;
1318 } else {
1319 moreswitches(d);
1320 }
6224f72b 1321 }
6224f72b
GS
1322 }
1323 }
a0d0e21e 1324
6224f72b
GS
1325 if (!scriptname)
1326 scriptname = argv[0];
3280af22 1327 if (PL_e_script) {
6224f72b
GS
1328 argc++,argv--;
1329 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1330 }
1331 else if (scriptname == Nullch) {
1332#ifdef MSDOS
1333 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1334 moreswitches("h");
1335#endif
1336 scriptname = "-";
1337 }
1338
1339 init_perllib();
1340
1341 open_script(scriptname,dosearch,sv,&fdscript);
1342
1343 validate_suid(validarg, scriptname,fdscript);
1344
64ca3a65 1345#ifndef PERL_MICRO
0b5b802d
GS
1346#if defined(SIGCHLD) || defined(SIGCLD)
1347 {
1348#ifndef SIGCHLD
1349# define SIGCHLD SIGCLD
1350#endif
1351 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1352 if (sigstate == SIG_IGN) {
1353 if (ckWARN(WARN_SIGNAL))
1354 Perl_warner(aTHX_ WARN_SIGNAL,
1355 "Can't ignore signal CHLD, forcing to default");
1356 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1357 }
1358 }
1359#endif
64ca3a65 1360#endif
0b5b802d 1361
bf4acbe4
GS
1362#ifdef MACOS_TRADITIONAL
1363 if (PL_doextract || gMacPerl_AlwaysExtract) {
1364#else
f4c556ac 1365 if (PL_doextract) {
bf4acbe4 1366#endif
6224f72b 1367 find_beginning();
f4c556ac
GS
1368 if (cddir && PerlDir_chdir(cddir) < 0)
1369 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1370
1371 }
6224f72b 1372
3280af22
NIS
1373 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1374 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1375 CvUNIQUE_on(PL_compcv);
1376
1377 PL_comppad = newAV();
1378 av_push(PL_comppad, Nullsv);
1379 PL_curpad = AvARRAY(PL_comppad);
1380 PL_comppad_name = newAV();
1381 PL_comppad_name_fill = 0;
1382 PL_min_intro_pending = 0;
1383 PL_padix = 0;
4d1ff10f 1384#ifdef USE_5005THREADS
79cb57f6 1385 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS
1386 PL_curpad[0] = (SV*)newAV();
1387 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1388 CvOWNER(PL_compcv) = 0;
1389 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1390 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1391#endif /* USE_5005THREADS */
6224f72b
GS
1392
1393 comppadlist = newAV();
1394 AvREAL_off(comppadlist);
3280af22
NIS
1395 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1396 av_store(comppadlist, 1, (SV*)PL_comppad);
1397 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1398
0c4f7ff0 1399 boot_core_PerlIO();
6224f72b 1400 boot_core_UNIVERSAL();
9a34ef1d 1401#ifndef PERL_MICRO
09bef843 1402 boot_core_xsutils();
9a34ef1d 1403#endif
6224f72b
GS
1404
1405 if (xsinit)
acfe0abc 1406 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1407#ifndef PERL_MICRO
ed79a026 1408#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1409 init_os_extras();
6224f72b 1410#endif
64ca3a65 1411#endif
6224f72b 1412
29209bc5 1413#ifdef USE_SOCKS
1b9c9cf5
DH
1414# ifdef HAS_SOCKS5_INIT
1415 socks5_init(argv[0]);
1416# else
29209bc5 1417 SOCKSinit(argv[0]);
1b9c9cf5 1418# endif
ac27b0f5 1419#endif
29209bc5 1420
6224f72b
GS
1421 init_predump_symbols();
1422 /* init_postdump_symbols not currently designed to be called */
1423 /* more than once (ENV isn't cleared first, for example) */
1424 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1425 if (!PL_do_undump)
6224f72b
GS
1426 init_postdump_symbols(argc,argv,env);
1427
1428 init_lexer();
1429
1430 /* now parse the script */
1431
91487cfc 1432 SETERRNO(0,SS$_NORMAL);
3280af22 1433 PL_error_count = 0;
bf4acbe4
GS
1434#ifdef MACOS_TRADITIONAL
1435 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1436 if (PL_minus_c)
1437 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1438 else {
1439 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1440 MacPerl_MPWFileName(PL_origfilename));
1441 }
1442 }
1443#else
3280af22
NIS
1444 if (yyparse() || PL_error_count) {
1445 if (PL_minus_c)
cea2e8a9 1446 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1447 else {
cea2e8a9 1448 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1449 PL_origfilename);
6224f72b
GS
1450 }
1451 }
bf4acbe4 1452#endif
57843af0 1453 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1454 PL_curstash = PL_defstash;
1455 PL_preprocess = FALSE;
1456 if (PL_e_script) {
1457 SvREFCNT_dec(PL_e_script);
1458 PL_e_script = Nullsv;
6224f72b
GS
1459 }
1460
8bfdd7d9
HS
1461/*
1462 Not sure that this is still the right place to do this now that we
1463 no longer use PL_nrs. HVDS 2001/09/09
1464*/
864dbfa3 1465 sv_setsv(get_sv("/", TRUE), PL_rs);
8bfdd7d9 1466
3280af22 1467 if (PL_do_undump)
6224f72b
GS
1468 my_unexec();
1469
57843af0
GS
1470 if (isWARN_ONCE) {
1471 SAVECOPFILE(PL_curcop);
1472 SAVECOPLINE(PL_curcop);
3280af22 1473 gv_check(PL_defstash);
57843af0 1474 }
6224f72b
GS
1475
1476 LEAVE;
1477 FREETMPS;
1478
1479#ifdef MYMALLOC
1480 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1481 dump_mstats("after compilation:");
1482#endif
1483
1484 ENTER;
3280af22 1485 PL_restartop = 0;
312caa8e 1486 return NULL;
6224f72b
GS
1487}
1488
954c1994
GS
1489/*
1490=for apidoc perl_run
1491
1492Tells a Perl interpreter to run. See L<perlembed>.
1493
1494=cut
1495*/
1496
6224f72b 1497int
0cb96387 1498perl_run(pTHXx)
6224f72b 1499{
6224f72b 1500 I32 oldscope;
14dd3ad8 1501 int ret = 0;
db36c5a1 1502 dJMPENV;
4d1ff10f 1503#ifdef USE_5005THREADS
cea2e8a9
GS
1504 dTHX;
1505#endif
6224f72b 1506
3280af22 1507 oldscope = PL_scopestack_ix;
96e176bf
CL
1508#ifdef VMS
1509 VMSISH_HUSHED = 0;
1510#endif
6224f72b 1511
14dd3ad8 1512#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1513 redo_body:
14dd3ad8
GS
1514 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1515#else
1516 JMPENV_PUSH(ret);
1517#endif
6224f72b
GS
1518 switch (ret) {
1519 case 1:
1520 cxstack_ix = -1; /* start context stack again */
312caa8e 1521 goto redo_body;
14dd3ad8
GS
1522 case 0: /* normal completion */
1523#ifndef PERL_FLEXIBLE_EXCEPTIONS
1524 redo_body:
1525 run_body(oldscope);
1526#endif
1527 /* FALL THROUGH */
1528 case 2: /* my_exit() */
3280af22 1529 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1530 LEAVE;
1531 FREETMPS;
3280af22 1532 PL_curstash = PL_defstash;
3a1ee7e8 1533 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
1534 PL_endav && !PL_minus_c)
1535 call_list(oldscope, PL_endav);
6224f72b
GS
1536#ifdef MYMALLOC
1537 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1538 dump_mstats("after execution: ");
1539#endif
14dd3ad8
GS
1540 ret = STATUS_NATIVE_EXPORT;
1541 break;
6224f72b 1542 case 3:
312caa8e
CS
1543 if (PL_restartop) {
1544 POPSTACK_TO(PL_mainstack);
1545 goto redo_body;
6224f72b 1546 }
bf49b057 1547 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1548 FREETMPS;
14dd3ad8
GS
1549 ret = 1;
1550 break;
6224f72b
GS
1551 }
1552
14dd3ad8
GS
1553 JMPENV_POP;
1554 return ret;
312caa8e
CS
1555}
1556
14dd3ad8 1557#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1558STATIC void *
14dd3ad8 1559S_vrun_body(pTHX_ va_list args)
312caa8e 1560{
312caa8e
CS
1561 I32 oldscope = va_arg(args, I32);
1562
14dd3ad8
GS
1563 return run_body(oldscope);
1564}
1565#endif
1566
1567
1568STATIC void *
1569S_run_body(pTHX_ I32 oldscope)
1570{
6224f72b 1571 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1572 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1573
3280af22 1574 if (!PL_restartop) {
6224f72b
GS
1575 DEBUG_x(dump_all());
1576 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1577 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1578 PTR2UV(thr)));
6224f72b 1579
3280af22 1580 if (PL_minus_c) {
bf4acbe4 1581#ifdef MACOS_TRADITIONAL
be708cc0 1582 PerlIO_printf(Perl_error_log, "# %s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1583#else
bf49b057 1584 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1585#endif
6224f72b
GS
1586 my_exit(0);
1587 }
3280af22 1588 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1589 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1590 if (PL_initav)
1591 call_list(oldscope, PL_initav);
6224f72b
GS
1592 }
1593
1594 /* do it */
1595
3280af22 1596 if (PL_restartop) {
533c011a 1597 PL_op = PL_restartop;
3280af22 1598 PL_restartop = 0;
cea2e8a9 1599 CALLRUNOPS(aTHX);
6224f72b 1600 }
3280af22
NIS
1601 else if (PL_main_start) {
1602 CvDEPTH(PL_main_cv) = 1;
533c011a 1603 PL_op = PL_main_start;
cea2e8a9 1604 CALLRUNOPS(aTHX);
6224f72b
GS
1605 }
1606
f6b3007c
JH
1607 my_exit(0);
1608 /* NOTREACHED */
312caa8e 1609 return NULL;
6224f72b
GS
1610}
1611
954c1994
GS
1612/*
1613=for apidoc p||get_sv
1614
1615Returns the SV of the specified Perl scalar. If C<create> is set and the
1616Perl variable does not exist then it will be created. If C<create> is not
1617set and the variable does not exist then NULL is returned.
1618
1619=cut
1620*/
1621
6224f72b 1622SV*
864dbfa3 1623Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1624{
1625 GV *gv;
4d1ff10f 1626#ifdef USE_5005THREADS
6224f72b
GS
1627 if (name[1] == '\0' && !isALPHA(name[0])) {
1628 PADOFFSET tmp = find_threadsv(name);
411caa50 1629 if (tmp != NOT_IN_PAD)
6224f72b 1630 return THREADSV(tmp);
6224f72b 1631 }
4d1ff10f 1632#endif /* USE_5005THREADS */
6224f72b
GS
1633 gv = gv_fetchpv(name, create, SVt_PV);
1634 if (gv)
1635 return GvSV(gv);
1636 return Nullsv;
1637}
1638
954c1994
GS
1639/*
1640=for apidoc p||get_av
1641
1642Returns the AV of the specified Perl array. If C<create> is set and the
1643Perl variable does not exist then it will be created. If C<create> is not
1644set and the variable does not exist then NULL is returned.
1645
1646=cut
1647*/
1648
6224f72b 1649AV*
864dbfa3 1650Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1651{
1652 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1653 if (create)
1654 return GvAVn(gv);
1655 if (gv)
1656 return GvAV(gv);
1657 return Nullav;
1658}
1659
954c1994
GS
1660/*
1661=for apidoc p||get_hv
1662
1663Returns the HV of the specified Perl hash. If C<create> is set and the
1664Perl variable does not exist then it will be created. If C<create> is not
1665set and the variable does not exist then NULL is returned.
1666
1667=cut
1668*/
1669
6224f72b 1670HV*
864dbfa3 1671Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1672{
a0d0e21e
LW
1673 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1674 if (create)
1675 return GvHVn(gv);
1676 if (gv)
1677 return GvHV(gv);
1678 return Nullhv;
1679}
1680
954c1994
GS
1681/*
1682=for apidoc p||get_cv
1683
1684Returns the CV of the specified Perl subroutine. If C<create> is set and
1685the Perl subroutine does not exist then it will be declared (which has the
1686same effect as saying C<sub name;>). If C<create> is not set and the
1687subroutine does not exist then NULL is returned.
1688
1689=cut
1690*/
1691
a0d0e21e 1692CV*
864dbfa3 1693Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
1694{
1695 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1696 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
1697 /* XXX this is probably not what they think they're getting.
1698 * It has the same effect as "sub name;", i.e. just a forward
1699 * declaration! */
8ebc5c01 1700 if (create && !GvCVu(gv))
774d564b 1701 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1702 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1703 Nullop,
a0d0e21e
LW
1704 Nullop);
1705 if (gv)
8ebc5c01 1706 return GvCVu(gv);
a0d0e21e
LW
1707 return Nullcv;
1708}
1709
79072805
LW
1710/* Be sure to refetch the stack pointer after calling these routines. */
1711
954c1994
GS
1712/*
1713=for apidoc p||call_argv
1714
1715Performs a callback to the specified Perl sub. See L<perlcall>.
1716
1717=cut
1718*/
1719
a0d0e21e 1720I32
864dbfa3 1721Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1722
8ac85365
NIS
1723 /* See G_* flags in cop.h */
1724 /* null terminated arg list */
8990e307 1725{
a0d0e21e 1726 dSP;
8990e307 1727
924508f0 1728 PUSHMARK(SP);
a0d0e21e 1729 if (argv) {
8990e307 1730 while (*argv) {
a0d0e21e 1731 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
1732 argv++;
1733 }
a0d0e21e 1734 PUTBACK;
8990e307 1735 }
864dbfa3 1736 return call_pv(sub_name, flags);
8990e307
LW
1737}
1738
954c1994
GS
1739/*
1740=for apidoc p||call_pv
1741
1742Performs a callback to the specified Perl sub. See L<perlcall>.
1743
1744=cut
1745*/
1746
a0d0e21e 1747I32
864dbfa3 1748Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
1749 /* name of the subroutine */
1750 /* See G_* flags in cop.h */
a0d0e21e 1751{
864dbfa3 1752 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
1753}
1754
954c1994
GS
1755/*
1756=for apidoc p||call_method
1757
1758Performs a callback to the specified Perl method. The blessed object must
1759be on the stack. See L<perlcall>.
1760
1761=cut
1762*/
1763
a0d0e21e 1764I32
864dbfa3 1765Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
1766 /* name of the subroutine */
1767 /* See G_* flags in cop.h */
a0d0e21e 1768{
968b3946 1769 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
1770}
1771
1772/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
1773/*
1774=for apidoc p||call_sv
1775
1776Performs a callback to the Perl sub whose name is in the SV. See
1777L<perlcall>.
1778
1779=cut
1780*/
1781
a0d0e21e 1782I32
864dbfa3 1783Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1784 /* See G_* flags in cop.h */
a0d0e21e 1785{
924508f0 1786 dSP;
a0d0e21e 1787 LOGOP myop; /* fake syntax tree node */
968b3946 1788 UNOP method_op;
aa689395 1789 I32 oldmark;
13689cfe 1790 volatile I32 retval = 0;
a0d0e21e 1791 I32 oldscope;
54310121 1792 bool oldcatch = CATCH_GET;
6224f72b 1793 int ret;
533c011a 1794 OP* oldop = PL_op;
db36c5a1 1795 dJMPENV;
1e422769 1796
a0d0e21e
LW
1797 if (flags & G_DISCARD) {
1798 ENTER;
1799 SAVETMPS;
1800 }
1801
aa689395 1802 Zero(&myop, 1, LOGOP);
54310121 1803 myop.op_next = Nullop;
f51d4af5 1804 if (!(flags & G_NOARGS))
aa689395 1805 myop.op_flags |= OPf_STACKED;
54310121
PP
1806 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1807 (flags & G_ARRAY) ? OPf_WANT_LIST :
1808 OPf_WANT_SCALAR);
462e5cf6 1809 SAVEOP();
533c011a 1810 PL_op = (OP*)&myop;
aa689395 1811
3280af22
NIS
1812 EXTEND(PL_stack_sp, 1);
1813 *++PL_stack_sp = sv;
aa689395 1814 oldmark = TOPMARK;
3280af22 1815 oldscope = PL_scopestack_ix;
a0d0e21e 1816
3280af22 1817 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1818 /* Handle first BEGIN of -d. */
3280af22 1819 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
1820 /* Try harder, since this may have been a sighandler, thus
1821 * curstash may be meaningless. */
3280af22 1822 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1823 && !(flags & G_NODEBUG))
533c011a 1824 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1825
968b3946
GS
1826 if (flags & G_METHOD) {
1827 Zero(&method_op, 1, UNOP);
1828 method_op.op_next = PL_op;
1829 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1830 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1831 PL_op = (OP*)&method_op;
968b3946
GS
1832 }
1833
312caa8e 1834 if (!(flags & G_EVAL)) {
0cdb2077 1835 CATCH_SET(TRUE);
14dd3ad8 1836 call_body((OP*)&myop, FALSE);
312caa8e 1837 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1838 CATCH_SET(oldcatch);
312caa8e
CS
1839 }
1840 else {
d78bda3d 1841 myop.op_other = (OP*)&myop;
3280af22 1842 PL_markstack_ptr--;
4633a7c4
LW
1843 /* we're trying to emulate pp_entertry() here */
1844 {
c09156bb 1845 register PERL_CONTEXT *cx;
54310121 1846 I32 gimme = GIMME_V;
ac27b0f5 1847
4633a7c4
LW
1848 ENTER;
1849 SAVETMPS;
ac27b0f5 1850
968b3946 1851 push_return(Nullop);
1d76a5c3 1852 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1853 PUSHEVAL(cx, 0, 0);
533c011a 1854 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1855
faef0170 1856 PL_in_eval = EVAL_INEVAL;
4633a7c4 1857 if (flags & G_KEEPERR)
faef0170 1858 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1859 else
38a03e6e 1860 sv_setpv(ERRSV,"");
4633a7c4 1861 }
3280af22 1862 PL_markstack_ptr++;
a0d0e21e 1863
14dd3ad8
GS
1864#ifdef PERL_FLEXIBLE_EXCEPTIONS
1865 redo_body:
1866 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1867 (OP*)&myop, FALSE);
14dd3ad8
GS
1868#else
1869 JMPENV_PUSH(ret);
1870#endif
6224f72b
GS
1871 switch (ret) {
1872 case 0:
14dd3ad8
GS
1873#ifndef PERL_FLEXIBLE_EXCEPTIONS
1874 redo_body:
1875 call_body((OP*)&myop, FALSE);
1876#endif
312caa8e
CS
1877 retval = PL_stack_sp - (PL_stack_base + oldmark);
1878 if (!(flags & G_KEEPERR))
1879 sv_setpv(ERRSV,"");
a0d0e21e 1880 break;
6224f72b 1881 case 1:
f86702cc 1882 STATUS_ALL_FAILURE;
a0d0e21e 1883 /* FALL THROUGH */
6224f72b 1884 case 2:
a0d0e21e 1885 /* my_exit() was called */
3280af22 1886 PL_curstash = PL_defstash;
a0d0e21e 1887 FREETMPS;
14dd3ad8 1888 JMPENV_POP;
cc3604b1 1889 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1890 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1891 my_exit_jump();
a0d0e21e 1892 /* NOTREACHED */
6224f72b 1893 case 3:
3280af22 1894 if (PL_restartop) {
533c011a 1895 PL_op = PL_restartop;
3280af22 1896 PL_restartop = 0;
312caa8e 1897 goto redo_body;
a0d0e21e 1898 }
3280af22 1899 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1900 if (flags & G_ARRAY)
1901 retval = 0;
1902 else {
1903 retval = 1;
3280af22 1904 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1905 }
312caa8e 1906 break;
a0d0e21e 1907 }
a0d0e21e 1908
3280af22 1909 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
1910 SV **newsp;
1911 PMOP *newpm;
1912 I32 gimme;
c09156bb 1913 register PERL_CONTEXT *cx;
a0a2876f
LW
1914 I32 optype;
1915
1916 POPBLOCK(cx,newpm);
1917 POPEVAL(cx);
1918 pop_return();
3280af22 1919 PL_curpm = newpm;
a0a2876f 1920 LEAVE;
a0d0e21e 1921 }
14dd3ad8 1922 JMPENV_POP;
a0d0e21e 1923 }
1e422769 1924
a0d0e21e 1925 if (flags & G_DISCARD) {
3280af22 1926 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1927 retval = 0;
1928 FREETMPS;
1929 LEAVE;
1930 }
533c011a 1931 PL_op = oldop;
a0d0e21e
LW
1932 return retval;
1933}
1934
14dd3ad8 1935#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1936STATIC void *
14dd3ad8 1937S_vcall_body(pTHX_ va_list args)
312caa8e
CS
1938{
1939 OP *myop = va_arg(args, OP*);
1940 int is_eval = va_arg(args, int);
1941
14dd3ad8 1942 call_body(myop, is_eval);
312caa8e
CS
1943 return NULL;
1944}
14dd3ad8 1945#endif
312caa8e
CS
1946
1947STATIC void
14dd3ad8 1948S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1949{
312caa8e
CS
1950 if (PL_op == myop) {
1951 if (is_eval)
f807eda9 1952 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1953 else
f807eda9 1954 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
1955 }
1956 if (PL_op)
cea2e8a9 1957 CALLRUNOPS(aTHX);
312caa8e
CS
1958}
1959
6e72f9df 1960/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1961
954c1994
GS
1962/*
1963=for apidoc p||eval_sv
1964
1965Tells Perl to C<eval> the string in the SV.
1966
1967=cut
1968*/
1969
a0d0e21e 1970I32
864dbfa3 1971Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1972
8ac85365 1973 /* See G_* flags in cop.h */
a0d0e21e 1974{
924508f0 1975 dSP;
a0d0e21e 1976 UNOP myop; /* fake syntax tree node */
8fa7f367 1977 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1978 volatile I32 retval = 0;
4633a7c4 1979 I32 oldscope;
6224f72b 1980 int ret;
533c011a 1981 OP* oldop = PL_op;
db36c5a1 1982 dJMPENV;
84902520 1983
4633a7c4
LW
1984 if (flags & G_DISCARD) {
1985 ENTER;
1986 SAVETMPS;
1987 }
1988
462e5cf6 1989 SAVEOP();
533c011a
NIS
1990 PL_op = (OP*)&myop;
1991 Zero(PL_op, 1, UNOP);
3280af22
NIS
1992 EXTEND(PL_stack_sp, 1);
1993 *++PL_stack_sp = sv;
1994 oldscope = PL_scopestack_ix;
79072805 1995
4633a7c4
LW
1996 if (!(flags & G_NOARGS))
1997 myop.op_flags = OPf_STACKED;
79072805 1998 myop.op_next = Nullop;
6e72f9df 1999 myop.op_type = OP_ENTEREVAL;
54310121
PP
2000 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2001 (flags & G_ARRAY) ? OPf_WANT_LIST :
2002 OPf_WANT_SCALAR);
6e72f9df
PP
2003 if (flags & G_KEEPERR)
2004 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2005
14dd3ad8 2006#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2007 redo_body:
14dd3ad8 2008 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2009 (OP*)&myop, TRUE);
14dd3ad8
GS
2010#else
2011 JMPENV_PUSH(ret);
2012#endif
6224f72b
GS
2013 switch (ret) {
2014 case 0:
14dd3ad8
GS
2015#ifndef PERL_FLEXIBLE_EXCEPTIONS
2016 redo_body:
2017 call_body((OP*)&myop,TRUE);
2018#endif
312caa8e
CS
2019 retval = PL_stack_sp - (PL_stack_base + oldmark);
2020 if (!(flags & G_KEEPERR))
2021 sv_setpv(ERRSV,"");
4633a7c4 2022 break;
6224f72b 2023 case 1:
f86702cc 2024 STATUS_ALL_FAILURE;
4633a7c4 2025 /* FALL THROUGH */
6224f72b 2026 case 2:
4633a7c4 2027 /* my_exit() was called */
3280af22 2028 PL_curstash = PL_defstash;
4633a7c4 2029 FREETMPS;
14dd3ad8 2030 JMPENV_POP;
cc3604b1 2031 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2032 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2033 my_exit_jump();
4633a7c4 2034 /* NOTREACHED */
6224f72b 2035 case 3:
3280af22 2036 if (PL_restartop) {
533c011a 2037 PL_op = PL_restartop;
3280af22 2038 PL_restartop = 0;
312caa8e 2039 goto redo_body;
4633a7c4 2040 }
3280af22 2041 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2042 if (flags & G_ARRAY)
2043 retval = 0;
2044 else {
2045 retval = 1;
3280af22 2046 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2047 }
312caa8e 2048 break;
4633a7c4
LW
2049 }
2050
14dd3ad8 2051 JMPENV_POP;
4633a7c4 2052 if (flags & G_DISCARD) {
3280af22 2053 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2054 retval = 0;
2055 FREETMPS;
2056 LEAVE;
2057 }
533c011a 2058 PL_op = oldop;
4633a7c4
LW
2059 return retval;
2060}
2061
954c1994
GS
2062/*
2063=for apidoc p||eval_pv
2064
2065Tells Perl to C<eval> the given string and return an SV* result.
2066
2067=cut
2068*/
2069
137443ea 2070SV*
864dbfa3 2071Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2072{
2073 dSP;
2074 SV* sv = newSVpv(p, 0);
2075
864dbfa3 2076 eval_sv(sv, G_SCALAR);
137443ea
PP
2077 SvREFCNT_dec(sv);
2078
2079 SPAGAIN;
2080 sv = POPs;
2081 PUTBACK;
2082
2d8e6c8d
GS
2083 if (croak_on_error && SvTRUE(ERRSV)) {
2084 STRLEN n_a;
cea2e8a9 2085 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2086 }
137443ea
PP
2087
2088 return sv;
2089}
2090
4633a7c4
LW
2091/* Require a module. */
2092
954c1994
GS
2093/*
2094=for apidoc p||require_pv
2095
7d3fb230
BS
2096Tells Perl to C<require> the file named by the string argument. It is
2097analogous to the Perl code C<eval "require '$file'">. It's even
2098implemented that way; consider using Perl_load_module instead.
954c1994 2099
7d3fb230 2100=cut */
954c1994 2101
4633a7c4 2102void
864dbfa3 2103Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2104{
d3acc0f7
JP
2105 SV* sv;
2106 dSP;
e788e7d3 2107 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2108 PUTBACK;
2109 sv = sv_newmortal();
4633a7c4
LW
2110 sv_setpv(sv, "require '");
2111 sv_catpv(sv, pv);
2112 sv_catpv(sv, "'");
864dbfa3 2113 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2114 SPAGAIN;
2115 POPSTACK;
79072805
LW
2116}
2117
79072805 2118void
864dbfa3 2119Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW
2120{
2121 register GV *gv;
2122
155aba94 2123 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2124 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2125}
2126
76e3520e 2127STATIC void
cea2e8a9 2128S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2129{
ab821d7f 2130 /* This message really ought to be max 23 lines.
75c72d73 2131 * Removed -h because the user already knows that option. Others? */
fb73857a 2132
76e3520e 2133 static char *usage_msg[] = {
fb73857a
PP
2134"-0[octal] specify record separator (\\0, if no argument)",
2135"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2136"-C enable native wide character system interfaces",
1950ee41 2137"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2138"-d[:debugger] run program under debugger",
2139"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2140"-e 'command' one line of program (several -e's allowed, omit programfile)",
2141"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2142"-i[extension] edit <> files in place (makes backup if extension supplied)",
2143"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2144"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2145"-[mM][-]module execute `use/no module...' before executing program",
2146"-n assume 'while (<>) { ... }' loop around program",
2147"-p assume loop like -n but print line also, like sed",
2148"-P run program through C preprocessor before compilation",
2149"-s enable rudimentary parsing for switches after programfile",
2150"-S look for programfile using PATH environment variable",
2151"-T enable tainting checks",
2152"-u dump core after parsing program",
fb73857a 2153"-U allow unsafe operations",
aac3bd0d
GS
2154"-v print version, subversion (includes VERY IMPORTANT perl info)",
2155"-V[:variable] print configuration summary (or a single Config.pm variable)",
2156"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS
2157"-W enable all warnings",
2158"-X disable all warnings",
fb73857a
PP
2159"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2160"\n",
2161NULL
2162};
76e3520e 2163 char **p = usage_msg;
fb73857a 2164
b0e47665
GS
2165 PerlIO_printf(PerlIO_stdout(),
2166 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2167 name);
fb73857a 2168 while (*p)
b0e47665 2169 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2170}
2171
79072805
LW
2172/* This routine handles any switches that can be given during run */
2173
2174char *
864dbfa3 2175Perl_moreswitches(pTHX_ char *s)
79072805 2176{
ba210ebe 2177 STRLEN numlen;
c07a80fd 2178 U32 rschar;
79072805
LW
2179
2180 switch (*s) {
2181 case '0':
a863c7d1 2182 {
53305cf1
NC
2183 I32 flags = 0;
2184 numlen = 4;
2185 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
8bfdd7d9 2186 SvREFCNT_dec(PL_rs);
c07a80fd 2187 if (rschar & ~((U8)~0))
8bfdd7d9 2188 PL_rs = &PL_sv_undef;
c07a80fd 2189 else if (!rschar && numlen >= 2)
8bfdd7d9 2190 PL_rs = newSVpvn("", 0);
c07a80fd
PP
2191 else {
2192 char ch = rschar;
8bfdd7d9 2193 PL_rs = newSVpvn(&ch, 1);
79072805
LW
2194 }
2195 return s + numlen;
a863c7d1 2196 }
46487f74
GS
2197 case 'C':
2198 PL_widesyscalls = TRUE;
2199 s++;
2200 return s;
2304df62 2201 case 'F':
3280af22 2202 PL_minus_F = TRUE;
ebce5377
RGS
2203 PL_splitstr = ++s;
2204 while (*s && !isSPACE(*s)) ++s;
2205 *s = '\0';
2206 PL_splitstr = savepv(PL_splitstr);
2304df62 2207 return s;
79072805 2208 case 'a':
3280af22 2209 PL_minus_a = TRUE;
79072805
LW
2210 s++;
2211 return s;
2212 case 'c':
3280af22 2213 PL_minus_c = TRUE;
79072805
LW
2214 s++;
2215 return s;
2216 case 'd':
bbce6d69 2217 forbid_setid("-d");
4633a7c4 2218 s++;
70c94a19
RR
2219 /* The following permits -d:Mod to accepts arguments following an =
2220 in the fashion that -MSome::Mod does. */
2221 if (*s == ':' || *s == '=') {
2222 char *start;
2223 SV *sv;
2224 sv = newSVpv("use Devel::", 0);
2225 start = ++s;
2226 /* We now allow -d:Module=Foo,Bar */
2227 while(isALNUM(*s) || *s==':') ++s;
2228 if (*s != '=')
2229 sv_catpv(sv, start);
2230 else {
2231 sv_catpvn(sv, start, s-start);
2232 sv_catpv(sv, " split(/,/,q{");
2233 sv_catpv(sv, ++s);
2234 sv_catpv(sv, "})");
2235 }
4633a7c4 2236 s += strlen(s);
70c94a19 2237 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2238 }
ed094faf 2239 if (!PL_perldb) {
3280af22 2240 PL_perldb = PERLDB_ALL;
a0d0e21e 2241 init_debugger();
ed094faf 2242 }
79072805
LW
2243 return s;
2244 case 'D':
0453d815 2245 {
79072805 2246#ifdef DEBUGGING
bbce6d69 2247 forbid_setid("-D");
79072805 2248 if (isALPHA(s[1])) {
04932ac8
DM
2249 /* if adding extra options, remember to update DEBUG_MASK */
2250 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW
2251 char *d;
2252
93a17b20 2253 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2254 PL_debug |= 1 << (d - debopts);
79072805
LW
2255 }
2256 else {
3280af22 2257 PL_debug = atoi(s+1);
79072805
LW
2258 for (s++; isDIGIT(*s); s++) ;
2259 }
aea4f609 2260 PL_debug |= DEBUG_TOP_FLAG;
79072805 2261#else
0453d815
PM
2262 if (ckWARN_d(WARN_DEBUGGING))
2263 Perl_warner(aTHX_ WARN_DEBUGGING,
2264 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2265 for (s++; isALNUM(*s); s++) ;
79072805
LW
2266#endif
2267 /*SUPPRESS 530*/
2268 return s;
0453d815 2269 }
4633a7c4 2270 case 'h':
ac27b0f5 2271 usage(PL_origargv[0]);
6ad3d225 2272 PerlProc_exit(0);
79072805 2273 case 'i':
3280af22
NIS
2274 if (PL_inplace)
2275 Safefree(PL_inplace);
2276 PL_inplace = savepv(s+1);
79072805 2277 /*SUPPRESS 530*/
3280af22 2278 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2279 if (*s) {
fb73857a 2280 *s++ = '\0';
7b8d334a
GS
2281 if (*s == '-') /* Additional switches on #! line. */
2282 s++;
2283 }
fb73857a 2284 return s;
4e49a025 2285 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2286 forbid_setid("-I");
fb73857a
PP
2287 ++s;
2288 while (*s && isSPACE(*s))
2289 ++s;
2290 if (*s) {
774d564b 2291 char *e, *p;
0df16ed7
GS
2292 p = s;
2293 /* ignore trailing spaces (possibly followed by other switches) */
2294 do {
2295 for (e = p; *e && !isSPACE(*e); e++) ;
2296 p = e;
2297 while (isSPACE(*p))
2298 p++;
2299 } while (*p && *p != '-');
2300 e = savepvn(s, e-s);
9c8a64f0 2301 incpush(e, TRUE, TRUE);
0df16ed7
GS
2302 Safefree(e);
2303 s = p;
2304 if (*s == '-')
2305 s++;
79072805
LW
2306 }
2307 else
a67e862a 2308 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2309 return s;
79072805 2310 case 'l':
3280af22 2311 PL_minus_l = TRUE;
79072805 2312 s++;
7889fe52
NIS
2313 if (PL_ors_sv) {
2314 SvREFCNT_dec(PL_ors_sv);
2315 PL_ors_sv = Nullsv;
2316 }
79072805 2317 if (isDIGIT(*s)) {
53305cf1 2318 I32 flags = 0;
7889fe52 2319 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2320 numlen = 3 + (*s == '0');
2321 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2322 s += numlen;
2323 }
2324 else {
8bfdd7d9 2325 if (RsPARA(PL_rs)) {
7889fe52
NIS
2326 PL_ors_sv = newSVpvn("\n\n",2);
2327 }
2328 else {
8bfdd7d9 2329 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2330 }
79072805
LW
2331 }
2332 return s;
1a30305b 2333 case 'M':
bbce6d69 2334 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2335 /* FALL THROUGH */
2336 case 'm':
bbce6d69 2337 forbid_setid("-m"); /* XXX ? */
1a30305b 2338 if (*++s) {
a5f75d66 2339 char *start;
11343788 2340 SV *sv;
a5f75d66
AD
2341 char *use = "use ";
2342 /* -M-foo == 'no foo' */
2343 if (*s == '-') { use = "no "; ++s; }
11343788 2344 sv = newSVpv(use,0);
a5f75d66 2345 start = s;
1a30305b 2346 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2347 while(isALNUM(*s) || *s==':') ++s;
2348 if (*s != '=') {
11343788 2349 sv_catpv(sv, start);
c07a80fd
PP
2350 if (*(start-1) == 'm') {
2351 if (*s != '\0')
cea2e8a9 2352 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2353 sv_catpv( sv, " ()");
c07a80fd
PP
2354 }
2355 } else {
6df41af2 2356 if (s == start)
be98fb35
GS
2357 Perl_croak(aTHX_ "Module name required with -%c option",
2358 s[-1]);
11343788
MB
2359 sv_catpvn(sv, start, s-start);
2360 sv_catpv(sv, " split(/,/,q{");
2361 sv_catpv(sv, ++s);
2362 sv_catpv(sv, "})");
c07a80fd 2363 }
1a30305b 2364 s += strlen(s);
5c831c24 2365 if (!PL_preambleav)
3280af22
NIS
2366 PL_preambleav = newAV();
2367 av_push(PL_preambleav, sv);
1a30305b
PP
2368 }
2369 else
cea2e8a9 2370 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2371 return s;
79072805 2372 case 'n':
3280af22 2373 PL_minus_n = TRUE;
79072805
LW
2374 s++;
2375 return s;
2376 case 'p':
3280af22 2377 PL_minus_p = TRUE;
79072805
LW
2378 s++;
2379 return s;
2380 case 's':
bbce6d69 2381 forbid_setid("-s");
3280af22 2382 PL_doswitches = TRUE;
79072805
LW
2383 s++;
2384 return s;
6537fe72
MS
2385 case 't':
2386 if (!PL_tainting)
2387 Perl_croak(aTHX_ "Too late for \"-t\" option");
2388 s++;
2389 return s;
463ee0b2 2390 case 'T':
3280af22 2391 if (!PL_tainting)
cea2e8a9 2392 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW
2393 s++;
2394 return s;
79072805 2395 case 'u':
bf4acbe4
GS
2396#ifdef MACOS_TRADITIONAL
2397 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2398#endif
3280af22 2399 PL_do_undump = TRUE;
79072805
LW
2400 s++;
2401 return s;
2402 case 'U':
3280af22 2403 PL_unsafe = TRUE;
79072805
LW
2404 s++;
2405 return s;
2406 case 'v':
8e9464f1 2407#if !defined(DGUX)
b0e47665 2408 PerlIO_printf(PerlIO_stdout(),
d2560b70 2409 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2410 PL_patchlevel, ARCHNAME));
8e9464f1
JH
2411#else /* DGUX */
2412/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2413 PerlIO_printf(PerlIO_stdout(),
2414 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2415 PerlIO_printf(PerlIO_stdout(),
2416 Perl_form(aTHX_ " built under %s at %s %s\n",
2417 OSNAME, __DATE__, __TIME__));
2418 PerlIO_printf(PerlIO_stdout(),
2419 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2420 OSVERS));
8e9464f1
JH
2421#endif /* !DGUX */
2422
fb73857a
PP
2423#if defined(LOCAL_PATCH_COUNT)
2424 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2425 PerlIO_printf(PerlIO_stdout(),
2426 "\n(with %d registered patch%s, "
2427 "see perl -V for more detail)",
2428 (int)LOCAL_PATCH_COUNT,
2429 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2430#endif
1a30305b 2431
b0e47665 2432 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2433 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH
2434#ifdef MACOS_TRADITIONAL
2435 PerlIO_printf(PerlIO_stdout(),
03765510
JH
2436 "\nMac OS port Copyright 1991-2001, Matthias Neeracher;\n"
2437 "maintained by Chris Nandor\n");
eae9c151 2438#endif
79072805 2439#ifdef MSDOS
b0e47665
GS
2440 PerlIO_printf(PerlIO_stdout(),
2441 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2442#endif
2443#ifdef DJGPP
b0e47665
GS
2444 PerlIO_printf(PerlIO_stdout(),
2445 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2446 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2447#endif
79072805 2448#ifdef OS2
b0e47665
GS
2449 PerlIO_printf(PerlIO_stdout(),
2450 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2451 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2452#endif
79072805 2453#ifdef atarist
b0e47665
GS
2454 PerlIO_printf(PerlIO_stdout(),
2455 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2456#endif
a3f9223b 2457#ifdef __BEOS__
b0e47665
GS
2458 PerlIO_printf(PerlIO_stdout(),
2459 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2460#endif
1d84e8df 2461#ifdef MPE
b0e47665 2462 PerlIO_printf(PerlIO_stdout(),
dc22e1c4 2463 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2001\n");
1d84e8df 2464#endif
9d116dd7 2465#ifdef OEMVS
b0e47665
GS
2466 PerlIO_printf(PerlIO_stdout(),
2467 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2468#endif
495c5fdc 2469#ifdef __VOS__
b0e47665
GS
2470 PerlIO_printf(PerlIO_stdout(),
2471 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2472#endif
092bebab 2473#ifdef __OPEN_VM
b0e47665
GS
2474 PerlIO_printf(PerlIO_stdout(),
2475 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2476#endif
a1a0e61e 2477#ifdef POSIX_BC
b0e47665
GS
2478 PerlIO_printf(PerlIO_stdout(),
2479 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2480#endif
61ae2fbf 2481#ifdef __MINT__
b0e47665
GS
2482 PerlIO_printf(PerlIO_stdout(),
2483 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2484#endif
f83d2536 2485#ifdef EPOC
b0e47665
GS
2486 PerlIO_printf(PerlIO_stdout(),
2487 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2488#endif
e1caacb4
JH
2489#ifdef UNDER_CE
2490 printf("WINCE port by Rainer Keuchel, 2001\n");
2491 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2492 wce_hitreturn();
2493#endif
baed7233
DL
2494#ifdef BINARY_BUILD_NOTICE
2495 BINARY_BUILD_NOTICE;
2496#endif
b0e47665
GS
2497 PerlIO_printf(PerlIO_stdout(),
2498 "\n\
79072805 2499Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2500GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2501Complete documentation for Perl, including FAQ lists, should be found on\n\
2502this system using `man perl' or `perldoc perl'. If you have access to the\n\
2503Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2504 PerlProc_exit(0);
79072805 2505 case 'w':
599cee73 2506 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2507 PL_dowarn |= G_WARN_ON;
599cee73
PM
2508 s++;
2509 return s;
2510 case 'W':
ac27b0f5 2511 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
d3a7d8c7 2512 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2513 s++;
2514 return s;
2515 case 'X':
ac27b0f5 2516 PL_dowarn = G_WARN_ALL_OFF;
d3a7d8c7 2517 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2518 s++;
2519 return s;
a0d0e21e 2520 case '*':
79072805
LW
2521 case ' ':
2522 if (s[1] == '-') /* Additional switches on #! line. */
2523 return s+2;
2524 break;
a0d0e21e 2525 case '-':
79072805 2526 case 0:
51882d45 2527#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2528 case '\r':
2529#endif
79072805
LW
2530 case '\n':
2531 case '\t':
2532 break;
aa689395
PP
2533#ifdef ALTERNATE_SHEBANG
2534 case 'S': /* OS/2 needs -S on "extproc" line. */
2535 break;
2536#endif
a0d0e21e 2537 case 'P':
3280af22 2538 if (PL_preprocess)
a0d0e21e
LW
2539 return s+1;
2540 /* FALL THROUGH */
79072805 2541 default:
cea2e8a9 2542 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2543 }
2544 return Nullch;
2545}
2546
2547/* compliments of Tom Christiansen */
2548
2549/* unexec() can be found in the Gnu emacs distribution */
ee580363 2550/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2551
2552void
864dbfa3 2553Perl_my_unexec(pTHX)
79072805
LW
2554{
2555#ifdef UNEXEC
46fc3d4c
PP
2556 SV* prog;
2557 SV* file;
ee580363 2558 int status = 1;
79072805
LW
2559 extern int etext;
2560
ee580363 2561 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2562 sv_catpv(prog, "/perl");
6b88bc9c 2563 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2564 sv_catpv(file, ".perldump");
79072805 2565
ee580363
GS
2566 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2567 /* unexec prints msg to stderr in case of failure */
6ad3d225 2568 PerlProc_exit(status);
79072805 2569#else
a5f75d66
AD
2570# ifdef VMS
2571# include <lib$routines.h>
2572 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2573# else
79072805 2574 ABORT(); /* for use with undump */
aa689395 2575# endif
a5f75d66 2576#endif
79072805
LW
2577}
2578
cb68f92d
GS
2579/* initialize curinterp */
2580STATIC void
cea2e8a9 2581S_init_interp(pTHX)
cb68f92d
GS
2582{
2583
acfe0abc
GS
2584#ifdef MULTIPLICITY
2585# define PERLVAR(var,type)
2586# define PERLVARA(var,n,type)
2587# if defined(PERL_IMPLICIT_CONTEXT)
2588# if defined(USE_5005THREADS)
2589# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2590# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
2591# else /* !USE_5005THREADS */
2592# define PERLVARI(var,type,init) aTHX->var = init;
2593# define PERLVARIC(var,type,init) aTHX->var = init;
2594# endif /* USE_5005THREADS */
3967c732 2595# else
acfe0abc
GS
2596# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2597# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2598# endif
acfe0abc
GS
2599# include "intrpvar.h"
2600# ifndef USE_5005THREADS
2601# include "thrdvar.h"
2602# endif
2603# undef PERLVAR
2604# undef PERLVARA
2605# undef PERLVARI
2606# undef PERLVARIC
2607#else
2608# define PERLVAR(var,type)
2609# define PERLVARA(var,n,type)
2610# define PERLVARI(var,type,init) PL_##var = init;
2611# define PERLVARIC(var,type,init) PL_##var = init;
2612# include "intrpvar.h"
2613# ifndef USE_5005THREADS
2614# include "thrdvar.h"
2615# endif
2616# undef PERLVAR
2617# undef PERLVARA
2618# undef PERLVARI
2619# undef PERLVARIC
cb68f92d
GS
2620#endif
2621
cb68f92d
GS
2622}
2623
76e3520e 2624STATIC void
cea2e8a9 2625S_init_main_stash(pTHX)
79072805 2626{
463ee0b2 2627 GV *gv;
6e72f9df 2628
3d47000e 2629
ac27b0f5 2630
3280af22 2631 PL_curstash = PL_defstash = newHV();
79cb57f6 2632 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
2633 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2634 SvREFCNT_dec(GvHV(gv));
3280af22 2635 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2636 SvREADONLY_on(gv);
3280af22
NIS
2637 HvNAME(PL_defstash) = savepv("main");
2638 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2639 GvMULTI_on(PL_incgv);
2640 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2641 GvMULTI_on(PL_hintgv);
2642 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2643 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2644 GvMULTI_on(PL_errgv);
2645 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2646 GvMULTI_on(PL_replgv);
cea2e8a9 2647 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
2648 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2649 sv_setpvn(ERRSV, "", 0);
3280af22 2650 PL_curstash = PL_defstash;
11faa288 2651 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2652 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2653 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2654 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2655 /* We must init $/ before switches are processed. */
864dbfa3 2656 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
2657}
2658
76e3520e 2659STATIC void
cea2e8a9 2660S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2661{
1b24ed4b
MS
2662 char *quote;
2663 char *code;
2664 char *cpp_discard_flag;
2665 char *perl;
2666
6c4ab083 2667 *fdscript = -1;
79072805 2668
3280af22
NIS
2669 if (PL_e_script) {
2670 PL_origfilename = savepv("-e");
96436eeb 2671 }
6c4ab083
GS
2672 else {
2673 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2674 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
2675
2676 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2677 char *s = scriptname + 8;
2678 *fdscript = atoi(s);
2679 while (isDIGIT(*s))
2680 s++;
2681 if (*s) {
2682 scriptname = savepv(s + 1);
3280af22
NIS
2683 Safefree(PL_origfilename);
2684 PL_origfilename = scriptname;
6c4ab083
GS
2685 }
2686 }
2687 }
2688
1b24ed4b
MS
2689# ifdef USE_ITHREADS
2690 Safefree(CopFILE(PL_curcop));
2691# else
2692 SvREFCNT_dec(CopFILEGV(PL_curcop));
2693# endif
57843af0 2694 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2695 if (strEQ(PL_origfilename,"-"))
79072805 2696 scriptname = "";
01f988be 2697 if (*fdscript >= 0) {
3280af22 2698 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS
2699# if defined(HAS_FCNTL) && defined(F_SETFD)
2700 if (PL_rsfp)
2701 /* ensure close-on-exec */
2702 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2703# endif
96436eeb 2704 }
3280af22 2705 else if (PL_preprocess) {
46fc3d4c 2706 char *cpp_cfg = CPPSTDIN;
79cb57f6 2707 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
2708 SV *cmd = NEWSV(0,0);
2709
2710 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2711 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2712 sv_catpv(cpp, cpp_cfg);
79072805 2713
1b24ed4b
MS
2714# ifndef VMS
2715 sv_catpvn(sv, "-I", 2);
2716 sv_catpv(sv,PRIVLIB_EXP);
2717# endif
46fc3d4c 2718
14953ddc
MB
2719 DEBUG_P(PerlIO_printf(Perl_debug_log,
2720 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2721 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS
2722
2723# if defined(MSDOS) || defined(WIN32) || defined(VMS)
2724 quote = "\"";
2725# else
2726 quote = "'";
2727# endif
2728
2729# ifdef VMS
2730 cpp_discard_flag = "";
2731# else
2732 cpp_discard_flag = "-C";
2733# endif
2734
2735# ifdef OS2
2736 perl = os2_execname(aTHX);
2737# else
2738 perl = PL_origargv[0];
2739# endif
2740
2741
2742 /* This strips off Perl comments which might interfere with
2743 the C pre-processor, including #!. #line directives are
2744 deliberately stripped to avoid confusion with Perl's version
2745 of #line. FWP played some golf with it so it will fit
2746 into VMS's 255 character buffer.
2747 */
2748 if( PL_doextract )
2749 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2750 else
2751 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2752
2753 Perl_sv_setpvf(aTHX_ cmd, "\
2754%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
2755 perl, quote, code, quote, scriptname, cpp,
2756 cpp_discard_flag, sv, CPPMINUS);
2757
3280af22 2758 PL_doextract = FALSE;
1b24ed4b
MS
2759# ifdef IAMSUID /* actually, this is caught earlier */
2760 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2761# ifdef HAS_SETEUID
2762 (void)seteuid(PL_uid); /* musn't stay setuid root */
2763# else
2764# ifdef HAS_SETREUID
2765 (void)setreuid((Uid_t)-1, PL_uid);
2766# else
2767# ifdef HAS_SETRESUID
2768 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2769# else
2770 PerlProc_setuid(PL_uid);
2771# endif
2772# endif
2773# endif
b28d0864 2774 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2775 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805 2776 }
1b24ed4b 2777# endif /* IAMSUID */
0a6c758d 2778
1b24ed4b
MS
2779 DEBUG_P(PerlIO_printf(Perl_debug_log,
2780 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS
2781 SvPVX(cmd)));
2782
3280af22 2783 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c
PP
2784 SvREFCNT_dec(cmd);
2785 SvREFCNT_dec(cpp);
79072805
LW
2786 }
2787 else if (!*scriptname) {
bbce6d69 2788 forbid_setid("program input from stdin");
3280af22 2789 PL_rsfp = PerlIO_stdin();
79072805 2790 }
96436eeb 2791 else {
3280af22 2792 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS
2793# if defined(HAS_FCNTL) && defined(F_SETFD)
2794 if (PL_rsfp)
2795 /* ensure close-on-exec */
2796 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2797# endif
96436eeb 2798 }
3280af22 2799 if (!PL_rsfp) {
1b24ed4b
MS
2800# ifdef DOSUID
2801# ifndef IAMSUID /* in case script is not readable before setuid */
2802 if (PL_euid &&
2803 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
2804 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2805 {
2806 /* try again */
2807 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT,
2808 BIN_EXP, (int)PERL_REVISION,
2809 (int)PERL_VERSION,
2810 (int)PERL_SUBVERSION), PL_origargv);
2811 Perl_croak(aTHX_ "Can't do setuid\n");
2812 }
2813# endif
2814# endif
2815# ifdef IAMSUID
2816 errno = EPERM;
2817 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2818 Strerror(errno));
2819# else
2820 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
2821 CopFILE(PL_curcop), Strerror(errno));
2822# endif
13281fa4 2823 }
79072805 2824}
8d063cd8 2825
7b89560d
JH
2826/* Mention
2827 * I_SYSSTATVFS HAS_FSTATVFS
2828 * I_SYSMOUNT
c890dc6c 2829 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
2830 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2831 * here so that metaconfig picks them up. */
2832
104d25b7 2833#ifdef IAMSUID
864dbfa3 2834STATIC int
e688b231 2835S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2836{
0545a864
JH
2837 int check_okay = 0; /* able to do all the required sys/libcalls */
2838 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2839/*
ad27e871 2840 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2841 * fstatvfs() is UNIX98.
0545a864 2842 * fstatfs() is 4.3 BSD.
ad27e871 2843 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
2844 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2845 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
2846 */
2847
6439433f
JH
2848#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2849
2850# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2851 defined(HAS_FSTATVFS)
2852# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2853 struct statvfs stfs;
6439433f 2854
104d25b7
JH
2855 check_okay = fstatvfs(fd, &stfs) == 0;
2856 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2857# endif /* fstatvfs */
ac27b0f5 2858
6439433f
JH
2859# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2860 defined(PERL_MOUNT_NOSUID) && \
2861 defined(HAS_FSTATFS) && \
2862 defined(HAS_STRUCT_STATFS) && \
2863 defined(HAS_STRUCT_STATFS_F_FLAGS)
2864# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2865 struct statfs stfs;
6439433f 2866
104d25b7 2867 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2868 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH
2869# endif /* fstatfs */
2870
2871# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2872 defined(PERL_MOUNT_NOSUID) && \
2873 defined(HAS_FSTAT) && \
2874 defined(HAS_USTAT) && \
2875 defined(HAS_GETMNT) && \
2876 defined(HAS_STRUCT_FS_DATA) && \
2877 defined(NOSTAT_ONE)
2878# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2879 struct stat fdst;
6439433f 2880
0545a864 2881 if (fstat(fd, &fdst) == 0) {
6439433f
JH
2882 struct ustat us;
2883 if (ustat(fdst.st_dev, &us) == 0) {
2884 struct fs_data fsd;
2885 /* NOSTAT_ONE here because we're not examining fields which
2886 * vary between that case and STAT_ONE. */
ad27e871 2887 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
2888 size_t cmplen = sizeof(us.f_fname);
2889 if (sizeof(fsd.fd_req.path) < cmplen)
2890 cmplen = sizeof(fsd.fd_req.path);
2891 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2892 fdst.st_dev == fsd.fd_req.dev) {
2893 check_okay = 1;
2894 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2895 }
2896 }
2897 }
2898 }
0545a864 2899 }
6439433f
JH
2900# endif /* fstat+ustat+getmnt */
2901
2902# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2903 defined(HAS_GETMNTENT) && \
2904 defined(HAS_HASMNTOPT) && \
2905 defined(MNTOPT_NOSUID)
2906# define FD_ON_NOSUID_CHECK_OKAY
2907 FILE *mtab = fopen("/etc/mtab", "r");
2908 struct mntent *entry;
2909 struct stat stb, fsb;
104d25b7
JH
2910
2911 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
2912 while (entry = getmntent(mtab)) {
2913 if (stat(entry->mnt_dir, &fsb) == 0
2914 && fsb.st_dev == stb.st_dev)
2915 {
2916 /* found the filesystem */
2917 check_okay = 1;
2918 if (hasmntopt(entry, MNTOPT_NOSUID))
2919 on_nosuid = 1;
2920 break;
2921 } /* A single fs may well fail its stat(). */
2922 }
104d25b7
JH
2923 }
2924 if (mtab)
6439433f
JH
2925 fclose(mtab);
2926# endif /* getmntent+hasmntopt */
0545a864 2927
ac27b0f5 2928 if (!check_okay)
0545a864 2929 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH
2930 return on_nosuid;
2931}
2932#endif /* IAMSUID */
2933
76e3520e 2934STATIC void
cea2e8a9 2935S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2936{
155aba94 2937#ifdef IAMSUID
96436eeb 2938 int which;
155aba94 2939#endif
96436eeb 2940
13281fa4
LW
2941 /* do we need to emulate setuid on scripts? */
2942
2943 /* This code is for those BSD systems that have setuid #! scripts disabled
2944 * in the kernel because of a security problem. Merely defining DOSUID
2945 * in perl will not fix that problem, but if you have disabled setuid
2946 * scripts in the kernel, this will attempt to emulate setuid and setgid
2947 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
2948 * root version must be called suidperl or sperlN.NNN. If regular perl
2949 * discovers that it has opened a setuid script, it calls suidperl with
2950 * the same argv that it had. If suidperl finds that the script it has
2951 * just opened is NOT setuid root, it sets the effective uid back to the
2952 * uid. We don't just make perl setuid root because that loses the
2953 * effective uid we had before invoking perl, if it was different from the
2954 * uid.
13281fa4
LW
2955 *
2956 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2957 * be defined in suidperl only. suidperl must be setuid root. The
2958 * Configure script will set this up for you if you want it.
2959 */
a687059c 2960
13281fa4 2961#ifdef DOSUID
6e72f9df 2962 char *s, *s2;
a0d0e21e 2963
b28d0864 2964 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2965 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2966 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2967 I32 len;
2d8e6c8d 2968 STRLEN n_a;
13281fa4 2969
a687059c 2970#ifdef IAMSUID
fe14fcc3 2971#ifndef HAS_SETREUID
a687059c
LW
2972 /* On this access check to make sure the directories are readable,
2973 * there is actually a small window that the user could use to make
2974 * filename point to an accessible directory. So there is a faint
2975 * chance that someone could execute a setuid script down in a
2976 * non-accessible directory. I don't know what to do about that.
2977 * But I don't think it's too important. The manual lies when
2978 * it says access() is useful in setuid programs.
2979 */
cc49e20b 2980 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2981 Perl_croak(aTHX_ "Permission denied");
a687059c
LW
2982#else
2983 /* If we can swap euid and uid, then we can determine access rights
2984 * with a simple stat of the file, and then compare device and
2985 * inode to make sure we did stat() on the same file we opened.
2986 * Then we just have to make sure he or she can execute it.
2987 */
2988 {
2989 struct stat tmpstatbuf;
2990
85e6fe83
LW
2991 if (
2992#ifdef HAS_SETREUID
b28d0864 2993 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW
2994#else
2995# if HAS_SETRESUID
b28d0864 2996 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 2997# endif
85e6fe83 2998#endif
b28d0864 2999 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 3000 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 3001 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 3002 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 3003#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 3004 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 3005 Perl_croak(aTHX_ "Permission denied");
104d25b7 3006#endif
b28d0864
NIS
3007 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3008 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3009 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3010 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3011 }
85e6fe83
LW
3012 if (
3013#ifdef HAS_SETREUID
b28d0864 3014 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW
3015#else
3016# if defined(HAS_SETRESUID)
b28d0864 3017 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3018# endif
85e6fe83 3019#endif
b28d0864 3020 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3021 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3022 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3023 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3024 }
fe14fcc3 3025#endif /* HAS_SETREUID */
a687059c
LW
3026#endif /* IAMSUID */
3027
b28d0864 3028 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3029 Perl_croak(aTHX_ "Permission denied");
b28d0864 3030 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3031 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3032 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3033 CopLINE_inc(PL_curcop);
6b88bc9c 3034 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3035 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3036 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3037 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3038 if (*s == ' ') s++;
45d8adaa 3039 while (!isSPACE(*s)) s++;
2d8e6c8d 3040 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df
PP
3041 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3042 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3043 Perl_croak(aTHX_ "Not a perl script");
a687059c 3044 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3045 /*
3046 * #! arg must be what we saw above. They can invoke it by
3047 * mentioning suidperl explicitly, but they may not add any strange
3048 * arguments beyond what #! says if they do invoke suidperl that way.
3049 */
3050 len = strlen(validarg);
3051 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3052 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3053 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW
3054
3055#ifndef IAMSUID
b28d0864
NIS
3056 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3057 PL_euid == PL_statbuf.st_uid)
3058 if (!PL_do_undump)
cea2e8a9 3059 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3060FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3061#endif /* IAMSUID */
13281fa4 3062
b28d0864
NIS
3063 if (PL_euid) { /* oops, we're not the setuid root perl */
3064 (void)PerlIO_close(PL_rsfp);
13281fa4 3065#ifndef IAMSUID
46fc3d4c 3066 /* try again */
a7cb1f99 3067 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3068 (int)PERL_REVISION, (int)PERL_VERSION,
3069 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3070#endif
cea2e8a9 3071 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
3072 }
3073
b28d0864 3074 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3075#ifdef HAS_SETEGID
b28d0864 3076 (void)setegid(PL_statbuf.st_gid);
a687059c 3077#else
fe14fcc3 3078#ifdef HAS_SETREGID
b28d0864 3079 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW
3080#else
3081#ifdef HAS_SETRESGID
b28d0864 3082 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3083#else
b28d0864 3084 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW
3085#endif
3086#endif
85e6fe83 3087#endif
b28d0864 3088 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3089 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3090 }
b28d0864
NIS
3091 if (PL_statbuf.st_mode & S_ISUID) {
3092 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3093#ifdef HAS_SETEUID
b28d0864 3094 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3095#else
fe14fcc3 3096#ifdef HAS_SETREUID
b28d0864 3097 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW
3098#else
3099#ifdef HAS_SETRESUID
b28d0864 3100 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3101#else
b28d0864 3102 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW
3103#endif
3104#endif
85e6fe83 3105#endif
b28d0864 3106 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3107 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3108 }
b28d0864 3109 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3110#ifdef HAS_SETEUID
b28d0864 3111 (void)seteuid((Uid_t)PL_uid);
a687059c 3112#else
fe14fcc3 3113#ifdef HAS_SETREUID
b28d0864 3114 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3115#else
85e6fe83 3116#ifdef HAS_SETRESUID
b28d0864 3117 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3118#else
b28d0864 3119 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3120#endif
a687059c
LW
3121#endif
3122#endif
b28d0864 3123 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3124 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3125 }
748a9306 3126 init_ids();
b28d0864 3127 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3128 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW
3129 }
3130#ifdef IAMSUID
6b88bc9c 3131 else if (PL_preprocess)
cea2e8a9 3132 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3133 else if (fdscript >= 0)
cea2e8a9 3134 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3135 else
cea2e8a9 3136 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb
PP
3137
3138 /* We absolutely must clear out any saved ids here, so we */
3139 /* exec the real perl, substituting fd script for scriptname. */
3140 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS
3141 PerlIO_rewind(PL_rsfp);
3142 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS
3143 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3144 if (!PL_origargv[which])
cea2e8a9
GS
3145 Perl_croak(aTHX_ "Permission denied");
3146 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3147 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3148#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3149 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3150#endif
a7cb1f99 3151 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3152 (int)PERL_REVISION, (int)PERL_VERSION,
3153 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3154 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3155#endif /* IAMSUID */
a687059c 3156#else /* !DOSUID */
3280af22 3157 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3158#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS
3159 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3160 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3161 ||
b28d0864 3162 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3163 )
b28d0864 3164 if (!PL_do_undump)
cea2e8a9 3165 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3166FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3167#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3168 /* not set-id, must be wrapped */
a687059c 3169 }
13281fa4 3170#endif /* DOSUID */
79072805 3171}
13281fa4 3172
76e3520e 3173STATIC void
cea2e8a9 3174S_find_beginning(pTHX)
79072805 3175{
6e72f9df 3176 register char *s, *s2;
33b78306
LW
3177
3178 /* skip forward in input to the real script? */
3179
bbce6d69 3180 forbid_setid("-x");
bf4acbe4 3181#ifdef MACOS_TRADITIONAL
084592ab 3182 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3183
bf4acbe4
GS
3184 while (PL_doextract || gMacPerl_AlwaysExtract) {
3185 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3186 if (!gMacPerl_AlwaysExtract)
3187 Perl_croak(aTHX_ "No Perl script found in input\n");
3188
3189 if (PL_doextract) /* require explicit override ? */
3190 if (!OverrideExtract(PL_origfilename))
3191 Perl_croak(aTHX_ "User aborted script\n");
3192 else
3193 PL_doextract = FALSE;
3194
3195 /* Pater peccavi, file does not have #! */
3196 PerlIO_rewind(PL_rsfp);
ac27b0f5 3197
bf4acbe4
GS
3198 break;
3199 }
3200#else
3280af22
NIS
3201 while (PL_doextract) {
3202 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3203 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3204#endif
4f0c37ba
IZ
3205 s2 = s;
3206 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS
3207 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3208 PL_doextract = FALSE;
6e72f9df
PP
3209 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3210 s2 = s;
3211 while (*s == ' ' || *s == '\t') s++;
3212 if (*s++ == '-') {
3213 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3214 if (strnEQ(s2-4,"perl",4))
3215 /*SUPPRESS 530*/
155aba94
GS
3216 while ((s = moreswitches(s)))
3217 ;
33b78306 3218 }
95e8664e
CN
3219#ifdef MACOS_TRADITIONAL
3220 break;
3221#endif
83025b21
LW
3222 }
3223 }
3224}
3225
afe37c7d 3226
76e3520e 3227STATIC void
cea2e8a9 3228S_init_ids(pTHX)
352d5a3a 3229{
d8eceb89
JH
3230 PL_uid = PerlProc_getuid();
3231 PL_euid = PerlProc_geteuid();
3232 PL_gid = PerlProc_getgid();
3233 PL_egid = PerlProc_getegid();
748a9306 3234#ifdef VMS
b28d0864
NIS
3235 PL_uid |= PL_gid << 16;
3236 PL_euid |= PL_egid << 16;
748a9306 3237#endif
3280af22 3238 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3239}
79072805 3240
76e3520e 3241STATIC void
cea2e8a9 3242S_forbid_setid(pTHX_ char *s)
bbce6d69 3243{
3280af22 3244 if (PL_euid != PL_uid)
cea2e8a9 3245 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3246 if (PL_egid != PL_gid)
cea2e8a9 3247 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69
PP
3248}
3249
1ee4443e
IZ
3250void
3251Perl_init_debugger(pTHX)
748a9306 3252{
1ee4443e
IZ
3253 HV *ostash = PL_curstash;
3254
3280af22
NIS
3255 PL_curstash = PL_debstash;
3256 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3257 AvREAL_off(PL_dbargs);
3258 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3259 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3260 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3261 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3262 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3263 sv_setiv(PL_DBsingle, 0);
3280af22 3264 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3265 sv_setiv(PL_DBtrace, 0);
3280af22 3266 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3267 sv_setiv(PL_DBsignal, 0);
1ee4443e 3268 PL_curstash = ostash;
352d5a3a
LW
3269}
3270
2ce36478
SM
3271#ifndef STRESS_REALLOC
3272#define REASONABLE(size) (size)
3273#else
3274#define REASONABLE(size) (1) /* unreasonable */
3275#endif
3276
11343788 3277void
cea2e8a9 3278Perl_init_stacks(pTHX)
79072805 3279{
e336de0d 3280 /* start with 128-item stack and 8K cxstack */
3280af22 3281 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3282 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS
3283 PL_curstackinfo->si_type = PERLSI_MAIN;
3284 PL_curstack = PL_curstackinfo->si_stack;
3285 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3286
3280af22
NIS
3287 PL_stack_base = AvARRAY(PL_curstack);
3288 PL_stack_sp = PL_stack_base;
3289 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3290
3280af22
NIS
3291 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3292 PL_tmps_floor = -1;
3293 PL_tmps_ix = -1;
3294 PL_tmps_max = REASONABLE(128);
8990e307 3295
3280af22
NIS
3296 New(54,PL_markstack,REASONABLE(32),I32);
3297 PL_markstack_ptr = PL_markstack;
3298 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3299
ce2f7c3b 3300 SET_MARK_OFFSET;
e336de0d 3301
3280af22
NIS
3302 New(54,PL_scopestack,REASONABLE(32),I32);
3303 PL_scopestack_ix = 0;
3304 PL_scopestack_max = REASONABLE(32);
79072805 3305
3280af22
NIS
3306 New(54,PL_savestack,REASONABLE(128),ANY);
3307 PL_savestack_ix = 0;
3308 PL_savestack_max = REASONABLE(128);
79072805 3309
3280af22
NIS
3310 New(54,PL_retstack,REASONABLE(16),OP*);
3311 PL_retstack_ix = 0;
3312 PL_retstack_max = REASONABLE(16);
378cc40b 3313}
33b78306 3314
2ce36478
SM
3315#undef REASONABLE
3316
76e3520e 3317STATIC void
cea2e8a9 3318S_nuke_stacks(pTHX)
6e72f9df 3319{
3280af22
NIS
3320 while (PL_curstackinfo->si_next)
3321 PL_curstackinfo = PL_curstackinfo->si_next;
3322 while (PL_curstackinfo) {
3323 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3324 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS
3325 Safefree(PL_curstackinfo->si_cxstack);
3326 Safefree(PL_curstackinfo);
3327 PL_curstackinfo = p;
e336de0d 3328 }
3280af22
NIS
3329 Safefree(PL_tmps_stack);
3330 Safefree(PL_markstack);
3331 Safefree(PL_scopestack);
3332 Safefree(PL_savestack);
3333 Safefree(PL_retstack);
378cc40b 3334}
33b78306 3335
76e3520e 3336STATIC void
cea2e8a9 3337S_init_lexer(pTHX)
8990e307 3338{
06039172 3339 PerlIO *tmpfp;
3280af22
NIS
3340 tmpfp = PL_rsfp;
3341 PL_rsfp = Nullfp;
3342 lex_start(PL_linestr);
3343 PL_rsfp = tmpfp;
79cb57f6 3344 PL_subname = newSVpvn("main",4);
8990e307
LW
3345}
3346
76e3520e 3347STATIC void
cea2e8a9 3348S_init_predump_symbols(pTHX)
45d8adaa 3349{
93a17b20 3350 GV *tmpgv;
af8c498a 3351 IO *io;
79072805 3352
864dbfa3 3353 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS
3354 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3355 GvMULTI_on(PL_stdingv);
af8c498a 3356 io = GvIOp(PL_stdingv);
a04651f4 3357 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3358 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3359 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3360 GvMULTI_on(tmpgv);
af8c498a 3361 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3362
85e6fe83 3363 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3364 GvMULTI_on(tmpgv);
af8c498a 3365 io = GvIOp(tmpgv);
a04651f4 3366 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3367 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3368 setdefout(tmpgv);
adbc6bb1 3369 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3370 GvMULTI_on(tmpgv);
af8c498a 3371 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3372
bf49b057
GS
3373 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3374 GvMULTI_on(PL_stderrgv);
3375 io = GvIOp(PL_stderrgv);
a04651f4 3376 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3377 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3378 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3379 GvMULTI_on(tmpgv);
af8c498a 3380 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3381
3280af22 3382 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3383
bf4acbe4
GS
3384 if (PL_osname)
3385 Safefree(PL_osname);
3386 PL_osname = savepv(OSNAME);
79072805 3387}
33b78306 3388
a11ec5a9
RGS
3389void
3390Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
33b78306 3391{
79072805 3392 char *s;
79072805 3393 argc--,argv++; /* skip name of script */
3280af22 3394 if (PL_doswitches) {
79072805
LW
3395 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3396 if (!argv[0][1])
3397 break;
379d538a 3398 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW
3399 argc--,argv++;
3400 break;
3401 }
155aba94 3402 if ((s = strchr(argv[0], '='))) {
79072805 3403 *s++ = '\0';
85e6fe83 3404 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW
3405 }
3406 else
85e6fe83 3407 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3408 }
79072805 3409 }
a11ec5a9
RGS
3410 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3411 GvMULTI_on(PL_argvgv);
3412 (void)gv_AVadd(PL_argvgv);
3413 av_clear(GvAVn(PL_argvgv));
3414 for (; argc > 0; argc--,argv++) {
3415 SV *sv = newSVpv(argv[0],0);
3416 av_push(GvAVn(PL_argvgv),sv);
3417 if (PL_widesyscalls)
3418 (void)sv_utf8_decode(sv);
3419 }
3420 }
3421}
3422
04fee9b5
NIS
3423#ifdef HAS_PROCSELFEXE
3424/* This is a function so that we don't hold on to MAXPATHLEN
8338e367 3425 bytes of stack longer than necessary
04fee9b5
NIS
3426 */
3427STATIC void
3428S_procself_val(pTHX_ SV *sv, char *arg0)
3429{
3430 char buf[MAXPATHLEN];
d13a6521 3431 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
04fee9b5
NIS
3432 if (len > 0) {
3433 sv_setpvn(sv,buf,len);
3434 }
3435 else {
3436 sv_setpv(sv,arg0);
3437 }
3438}
3439#endif /* HAS_PROCSELFEXE */
3440
a11ec5a9
RGS
3441STATIC void
3442S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3443{
3444 char *s;
3445 SV *sv;
3446 GV* tmpgv;
a11ec5a9 3447
3280af22
NIS
3448 PL_toptarget = NEWSV(0,0);
3449 sv_upgrade(PL_toptarget, SVt_PVFM);
3450 sv_setpvn(PL_toptarget, "", 0);
3451 PL_bodytarget = NEWSV(0,0);
3452 sv_upgrade(PL_bodytarget, SVt_PVFM);
3453 sv_setpvn(PL_bodytarget, "", 0);
3454 PL_formtarget = PL_bodytarget;
79072805 3455
bbce6d69 3456 TAINT;
a11ec5a9
RGS
3457
3458 init_argv_symbols(argc,argv);
3459
155aba94 3460 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS
3461#ifdef MACOS_TRADITIONAL
3462 /* $0 is not majick on a Mac */
3463 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3464#else
3280af22 3465 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3466 magicname("0", "0", 1);
bf4acbe4 3467#endif
79072805 3468 }
04fee9b5
NIS
3469 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))) {/* $^X */
3470#ifdef HAS_PROCSELFEXE
3471 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
3472#else
8338e367 3473#ifdef OS2
23da6c43 3474 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
8338e367
JH
3475#else
3476 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
3477#endif
04fee9b5
NIS
3478#endif
3479 }
155aba94 3480 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
79072805 3481 HV *hv;
3280af22
NIS
3482 GvMULTI_on(PL_envgv);
3483 hv = GvHVn(PL_envgv);
14befaf4 3484 hv_magic(hv, Nullgv, PERL_MAGIC_env);
fa6a1c44 3485#ifdef USE_ENVIRON_ARRAY
4633a7c4
LW
3486 /* Note that if the supplied env parameter is actually a copy