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Re: perl@15047 New format tests for still existing bugs
[perl5.git] / perl.c
CommitLineData
a0d0e21e
LW		 1/* perl.c
2 *
be3c0a43 3 * Copyright (c) 1987-2002 Larry Wall
a687059c 4 *
352d5a3a
LW		 5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
a687059c 7 *
8d063cd8
LW		 8 */
9
a0d0e21e
LW		 10/*
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
12 */
45d8adaa 13
378cc40b 14#include "EXTERN.h"
864dbfa3 15#define PERL_IN_PERL_C
378cc40b 16#include "perl.h"
e3321bb0 17#include "patchlevel.h" /* for local_patches */
378cc40b 18
df5cef82 19/* XXX If this causes problems, set i_unistd=undef in the hint file. */
a0d0e21e
LW		 20#ifdef I_UNISTD
21#include <unistd.h>
22#endif
a0d0e21e 23
7114a2d2 24#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
20ce7b12 25char *getenv (char *); /* Usually in <stdlib.h> */
54310121 26#endif
27
acfe0abc 28static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
0cb96387 29
a687059c
LW		 30#ifdef IAMSUID
31#ifndef DOSUID
32#define DOSUID
33#endif
34#endif
378cc40b 35
a687059c
LW		 36#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
37#ifdef DOSUID
38#undef DOSUID
39#endif
40#endif
8d063cd8 41
4d1ff10f 42#if defined(USE_5005THREADS)
06d86050
GS		 43# define INIT_TLS_AND_INTERP \
44 STMT_START { \
45 if (!PL_curinterp) { \
46 PERL_SET_INTERP(my_perl); \
47 INIT_THREADS; \
48 ALLOC_THREAD_KEY; \
49 } \
50 } STMT_END
51#else
52# if defined(USE_ITHREADS)
53# define INIT_TLS_AND_INTERP \
54 STMT_START { \
55 if (!PL_curinterp) { \
56 PERL_SET_INTERP(my_perl); \
57 INIT_THREADS; \
58 ALLOC_THREAD_KEY; \
534825c4
GS		 59 PERL_SET_THX(my_perl); \
60 OP_REFCNT_INIT; \
61 } \
62 else { \
63 PERL_SET_THX(my_perl); \
06d86050 64 } \
06d86050
GS		 65 } STMT_END
66# else
67# define INIT_TLS_AND_INTERP \
68 STMT_START { \
69 if (!PL_curinterp) { \
70 PERL_SET_INTERP(my_perl); \
71 } \
72 PERL_SET_THX(my_perl); \
73 } STMT_END
74# endif
75#endif
76
32e30700
GS		 77#ifdef PERL_IMPLICIT_SYS
78PerlInterpreter *
7766f137
GS		 79perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
80 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
32e30700
GS		 81 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
82 struct IPerlDir* ipD, struct IPerlSock* ipS,
83 struct IPerlProc* ipP)
84{
85 PerlInterpreter *my_perl;
32e30700
GS		 86 /* New() needs interpreter, so call malloc() instead */
87 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 88 INIT_TLS_AND_INTERP;
32e30700
GS		 89 Zero(my_perl, 1, PerlInterpreter);
90 PL_Mem = ipM;
7766f137
GS		 91 PL_MemShared = ipMS;
92 PL_MemParse = ipMP;
32e30700
GS		 93 PL_Env = ipE;
94 PL_StdIO = ipStd;
95 PL_LIO = ipLIO;
96 PL_Dir = ipD;
97 PL_Sock = ipS;
98 PL_Proc = ipP;
7766f137 99
32e30700
GS		 100 return my_perl;
101}
102#else
954c1994
GS		 103
104/*
ccfc67b7
JH		 105=head1 Embedding Functions
106
954c1994
GS		 107=for apidoc perl_alloc
108
109Allocates a new Perl interpreter. See L<perlembed>.
110
111=cut
112*/
113
93a17b20 114PerlInterpreter *
cea2e8a9 115perl_alloc(void)
79072805 116{
cea2e8a9 117 PerlInterpreter *my_perl;
79072805 118
54aff467 119 /* New() needs interpreter, so call malloc() instead */
e8ee3774 120 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 121
06d86050 122 INIT_TLS_AND_INTERP;
dedcbb81 123 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 124 return my_perl;
79072805 125}
32e30700 126#endif /* PERL_IMPLICIT_SYS */
79072805 127
954c1994
GS		 128/*
129=for apidoc perl_construct
130
131Initializes a new Perl interpreter. See L<perlembed>.
132
133=cut
134*/
135
79072805 136void
0cb96387 137perl_construct(pTHXx)
79072805 138{
4d1ff10f 139#ifdef USE_5005THREADS
a863c7d1 140#ifndef FAKE_THREADS
e1f15930 141 struct perl_thread *thr = NULL;
a863c7d1 142#endif /* FAKE_THREADS */
4d1ff10f 143#endif /* USE_5005THREADS */
ba869deb 144
8990e307 145#ifdef MULTIPLICITY
54aff467 146 init_interp();
ac27b0f5 147 PL_perl_destruct_level = 1;
54aff467
GS		 148#else
149 if (PL_perl_destruct_level > 0)
150 init_interp();
151#endif
152
33f46ff6 153 /* Init the real globals (and main thread)? */
3280af22 154 if (!PL_linestr) {
4d1ff10f 155#ifdef USE_5005THREADS
533c011a 156 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB		 157 /*
158 * Safe to use basic SV functions from now on (though
159 * not things like mortals or tainting yet).
160 */
533c011a
NIS		 161 MUTEX_INIT(&PL_eval_mutex);
162 COND_INIT(&PL_eval_cond);
163 MUTEX_INIT(&PL_threads_mutex);
164 COND_INIT(&PL_nthreads_cond);
ba869deb 165# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 166 MUTEX_INIT(&PL_svref_mutex);
ba869deb 167# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 168
5ff3f7a4 169 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS		 170 MUTEX_INIT(&PL_sv_lock_mutex);
171 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 172
199100c8 173 thr = init_main_thread();
4d1ff10f 174#endif /* USE_5005THREADS */
11343788 175
14dd3ad8 176#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 177 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 178#endif
312caa8e 179
2aea9f8a
GS		 180 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
181
3280af22
NIS		 182 PL_linestr = NEWSV(65,79);
183 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 184
3280af22 185 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP		 186 /* set read-only and try to insure than we wont see REFCNT==0
187 very often */
188
3280af22
NIS		 189 SvREADONLY_on(&PL_sv_undef);
190 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 191
3280af22
NIS		 192 sv_setpv(&PL_sv_no,PL_No);
193 SvNV(&PL_sv_no);
194 SvREADONLY_on(&PL_sv_no);
195 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 196
3280af22
NIS		 197 sv_setpv(&PL_sv_yes,PL_Yes);
198 SvNV(&PL_sv_yes);
199 SvREADONLY_on(&PL_sv_yes);
200 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 201 }
79072805 202
cea2e8a9 203 PL_sighandlerp = Perl_sighandler;
3280af22 204 PL_pidstatus = newHV();
79072805
LW		 205 }
206
8bfdd7d9 207 PL_rs = newSVpvn("\n", 1);
dc92893f 208
cea2e8a9 209 init_stacks();
79072805 210
748a9306 211 init_ids();
3280af22 212 PL_lex_state = LEX_NOTPARSING;
a5f75d66 213
312caa8e 214 JMPENV_BOOTSTRAP;
f86702cc 215 STATUS_ALL_SUCCESS;
216
0672f40e 217 init_i18nl10n(1);
36477c24 218 SET_NUMERIC_STANDARD();
0b5b802d 219
a7cb1f99
GS		 220 {
221 U8 *s;
222 PL_patchlevel = NEWSV(0,4);
155aba94 223 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 224 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 225 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 226 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS		 227 /* Build version strings using "native" characters */
228 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
229 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
230 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS		 231 *s = '\0';
232 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
233 SvPOK_on(PL_patchlevel);
234 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
235 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 236#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 237 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 238#endif
a7cb1f99
GS		 239 ;
240 SvNOK_on(PL_patchlevel); /* dual valued */
241 SvUTF8_on(PL_patchlevel);
242 SvREADONLY_on(PL_patchlevel);
243 }
79072805 244
ab821d7f 245#if defined(LOCAL_PATCH_COUNT)
3280af22 246 PL_localpatches = local_patches; /* For possible -v */
ab821d7f 247#endif
248
52853b95
GS		 249#ifdef HAVE_INTERP_INTERN
250 sys_intern_init();
251#endif
252
3a1ee7e8 253 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 254
3280af22
NIS		 255 PL_fdpid = newAV(); /* for remembering popen pids by fd */
256 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 257 PL_errors = newSVpvn("",0);
1fcf4c12 258#ifdef USE_ITHREADS
13137afc
AB		 259 PL_regex_padav = newAV();
260 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
261 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 262#endif
e5dd39fc
AB		 263#ifdef USE_REENTRANT_API
264 New(31337, PL_reentrant_buffer,1, REBUF);
265 New(31337, PL_reentrant_buffer->tmbuff,1, struct tm);
266#endif
3d47000e
AB		 267
268 /* Note that strtab is a rather special HV. Assumptions are made
269 about not iterating on it, and not adding tie magic to it.
270 It is properly deallocated in perl_destruct() */
271 PL_strtab = newHV();
272
273#ifdef USE_5005THREADS
274 MUTEX_INIT(&PL_strtab_mutex);
275#endif
276 HvSHAREKEYS_off(PL_strtab); /* mandatory */
277 hv_ksplit(PL_strtab, 512);
278
0631ea03
AB		 279#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
280 _dyld_lookup_and_bind
281 ("__environ", (unsigned long *) &environ_pointer, NULL);
282#endif /* environ */
283
284#ifdef USE_ENVIRON_ARRAY
285 PL_origenviron = environ;
286#endif
287
8990e307 288 ENTER;
79072805
LW		 289}
290
954c1994
GS		 291/*
292=for apidoc perl_destruct
293
294Shuts down a Perl interpreter. See L<perlembed>.
295
296=cut
297*/
298
31d77e54 299int
0cb96387 300perl_destruct(pTHXx)
79072805 301{
7c474504 302 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 303 HV *hv;
4d1ff10f 304#ifdef USE_5005THREADS
33f46ff6 305 Thread t;
cea2e8a9 306 dTHX;
4d1ff10f 307#endif /* USE_5005THREADS */
8990e307 308
7766f137
GS		 309 /* wait for all pseudo-forked children to finish */
310 PERL_WAIT_FOR_CHILDREN;
311
4d1ff10f 312#ifdef USE_5005THREADS
0f15f207 313#ifndef FAKE_THREADS
8023c3ce
MB		 314 /* Pass 1 on any remaining threads: detach joinables, join zombies */
315 retry_cleanup:
533c011a 316 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 317 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 318 "perl_destruct: waiting for %d threads...\n",
533c011a 319 PL_nthreads - 1));
33f46ff6 320 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB		 321 MUTEX_LOCK(&t->mutex);
322 switch (ThrSTATE(t)) {
323 AV *av;
c7848ba1 324 case THRf_ZOMBIE:
bf49b057 325 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 326 "perl_destruct: joining zombie %p\n", t));
605e5515
MB		 327 ThrSETSTATE(t, THRf_DEAD);
328 MUTEX_UNLOCK(&t->mutex);
533c011a 329 PL_nthreads--;
8023c3ce
MB		 330 /*
331 * The SvREFCNT_dec below may take a long time (e.g. av
332 * may contain an object scalar whose destructor gets
333 * called) so we have to unlock threads_mutex and start
334 * all over again.
335 */
533c011a 336 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 337 JOIN(t, &av);
605e5515 338 SvREFCNT_dec((SV*)av);
bf49b057 339 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 340 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 341 goto retry_cleanup;
c7848ba1 342 case THRf_R_JOINABLE:
bf49b057 343 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 344 "perl_destruct: detaching thread %p\n", t));
345 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 346 /*
c7848ba1
MB		 347 * We unlock threads_mutex and t->mutex in the opposite order
348 * from which we locked them just so that DETACH won't
349 * deadlock if it panics. It's only a breach of good style
350 * not a bug since they are unlocks not locks.
351 */
533c011a 352 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB		 353 DETACH(t);
354 MUTEX_UNLOCK(&t->mutex);
8023c3ce 355 goto retry_cleanup;
c7848ba1 356 default:
bf49b057 357 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 358 "perl_destruct: ignoring %p (state %u)\n",
359 t, ThrSTATE(t)));
360 MUTEX_UNLOCK(&t->mutex);
c7848ba1 361 /* fall through and out */
33f46ff6
MB		 362 }
363 }
8023c3ce
MB		 364 /* We leave the above "Pass 1" loop with threads_mutex still locked */
365
366 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 367 while (PL_nthreads > 1)
11343788 368 {
bf49b057 369 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 370 "perl_destruct: final wait for %d threads\n",
533c011a
NIS		 371 PL_nthreads - 1));
372 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB		 373 }
374 /* At this point, we're the last thread */
533c011a 375 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 376 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS		 377 MUTEX_DESTROY(&PL_threads_mutex);
378 COND_DESTROY(&PL_nthreads_cond);
b57a092c 379 PL_nthreads--;
0f15f207 380#endif /* !defined(FAKE_THREADS) */
4d1ff10f 381#endif /* USE_5005THREADS */
11343788 382
3280af22 383 destruct_level = PL_perl_destruct_level;
4633a7c4
LW		 384#ifdef DEBUGGING
385 {
386 char *s;
155aba94 387 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc 388 int i = atoi(s);
389 if (destruct_level < i)
390 destruct_level = i;
391 }
4633a7c4
LW		 392 }
393#endif
394
31d77e54
AB		 395
396 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB		 397 dJMPENV;
398 int x = 0;
399
400 JMPENV_PUSH(x);
401 if (PL_endav && !PL_minus_c)
402 call_list(PL_scopestack_ix, PL_endav);
403 JMPENV_POP;
26f423df 404 }
f3faeb53 405 LEAVE;
a0d0e21e
LW		 406 FREETMPS;
407
ff0cee69 408 /* We must account for everything. */
409
410 /* Destroy the main CV and syntax tree */
3280af22
NIS		 411 if (PL_main_root) {
412 PL_curpad = AvARRAY(PL_comppad);
413 op_free(PL_main_root);
414 PL_main_root = Nullop;
a0d0e21e 415 }
3280af22
NIS		 416 PL_curcop = &PL_compiling;
417 PL_main_start = Nullop;
418 SvREFCNT_dec(PL_main_cv);
419 PL_main_cv = Nullcv;
24d3c518 420 PL_dirty = TRUE;
ff0cee69 421
13621cfb
NIS		 422 /* Tell PerlIO we are about to tear things apart in case
423 we have layers which are using resources that should
424 be cleaned up now.
425 */
426
427 PerlIO_destruct(aTHX);
428
3280af22 429 if (PL_sv_objcount) {
a0d0e21e
LW		 430 /*
431 * Try to destruct global references. We do this first so that the
432 * destructors and destructees still exist. Some sv's might remain.
433 * Non-referenced objects are on their own.
434 */
a0d0e21e 435 sv_clean_objs();
8990e307
LW		 436 }
437
5cd24f17 438 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS		 439 SvREFCNT_dec(PL_warnhook);
440 PL_warnhook = Nullsv;
441 SvREFCNT_dec(PL_diehook);
442 PL_diehook = Nullsv;
5cd24f17 443
4b556e6c 444 /* call exit list functions */
3280af22 445 while (PL_exitlistlen-- > 0)
acfe0abc 446 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 447
3280af22 448 Safefree(PL_exitlist);
4b556e6c 449
a0d0e21e 450 if (destruct_level == 0){
8990e307 451
a0d0e21e 452 DEBUG_P(debprofdump());
ac27b0f5 453
56a2bab7
NIS		 454#if defined(PERLIO_LAYERS)
455 /* No more IO - including error messages ! */
456 PerlIO_cleanup(aTHX);
457#endif
458
a0d0e21e 459 /* The exit() function will do everything that needs doing. */
31d77e54 460 return STATUS_NATIVE_EXPORT;;
a0d0e21e 461 }
5dd60ef7 462
551a8b83 463 /* jettison our possibly duplicated environment */
4b647fb0
DM		 464 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
465 * so we certainly shouldn't free it here
466 */
467#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
551a8b83
JH		 468 if (environ != PL_origenviron) {
469 I32 i;
470
471 for (i = 0; environ[i]; i++)
4b420006 472 safesysfree(environ[i]);
0631ea03 473
4b420006
JH		 474 /* Must use safesysfree() when working with environ. */
475 safesysfree(environ);
551a8b83
JH		 476
477 environ = PL_origenviron;
478 }
479#endif
480
5f8cb046
DM		 481#ifdef USE_ITHREADS
482 /* the syntax tree is shared between clones
483 * so op_free(PL_main_root) only ReREFCNT_dec's
484 * REGEXPs in the parent interpreter
485 * we need to manually ReREFCNT_dec for the clones
486 */
487 {
488 I32 i = AvFILLp(PL_regex_padav) + 1;
489 SV **ary = AvARRAY(PL_regex_padav);
490
491 while (i) {
35061a7e 492 SV *resv = ary[--i];
ba89bb6e 493 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM		 494
495 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 496 /* this is PL_reg_curpm, already freed
35061a7e
DM		 497 * flag is set in regexec.c:S_regtry
498 */
499 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 500 }
1cc8b4c5
AB		 501 else if(SvREPADTMP(resv)) {
502 SvREPADTMP_off(resv);
503 }
35061a7e 504 else {
5f8cb046
DM		 505 ReREFCNT_dec(re);
506 }
507 }
508 }
509 SvREFCNT_dec(PL_regex_padav);
510 PL_regex_padav = Nullav;
511 PL_regex_pad = NULL;
512#endif
513
5f05dabc 514 /* loosen bonds of global variables */
515
3280af22
NIS		 516 if(PL_rsfp) {
517 (void)PerlIO_close(PL_rsfp);
518 PL_rsfp = Nullfp;
8ebc5c01 519 }
520
521 /* Filters for program text */
3280af22
NIS		 522 SvREFCNT_dec(PL_rsfp_filters);
523 PL_rsfp_filters = Nullav;
8ebc5c01 524
525 /* switches */
3280af22
NIS		 526 PL_preprocess = FALSE;
527 PL_minus_n = FALSE;
528 PL_minus_p = FALSE;
529 PL_minus_l = FALSE;
530 PL_minus_a = FALSE;
531 PL_minus_F = FALSE;
532 PL_doswitches = FALSE;
599cee73 533 PL_dowarn = G_WARN_OFF;
3280af22
NIS		 534 PL_doextract = FALSE;
535 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS		 536 PL_unsafe = FALSE;
537
538 Safefree(PL_inplace);
539 PL_inplace = Nullch;
a7cb1f99 540 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS		 541
542 if (PL_e_script) {
543 SvREFCNT_dec(PL_e_script);
544 PL_e_script = Nullsv;
8ebc5c01 545 }
546
bc0a45ed
DM		 547 while (--PL_origargc >= 0) {
548 Safefree(PL_origargv[PL_origargc]);
549 }
550 Safefree(PL_origargv);
551
8ebc5c01 552 /* magical thingies */
553
7889fe52
NIS		 554 SvREFCNT_dec(PL_ofs_sv); /* $, */
555 PL_ofs_sv = Nullsv;
5f05dabc 556
7889fe52
NIS		 557 SvREFCNT_dec(PL_ors_sv); /* $\ */
558 PL_ors_sv = Nullsv;
8ebc5c01 559
3280af22
NIS		 560 SvREFCNT_dec(PL_rs); /* $/ */
561 PL_rs = Nullsv;
dc92893f 562
d33b2eba
GS		 563 PL_multiline = 0; /* $* */
564 Safefree(PL_osname); /* $^O */
565 PL_osname = Nullch;
5f05dabc 566
3280af22
NIS		 567 SvREFCNT_dec(PL_statname);
568 PL_statname = Nullsv;
569 PL_statgv = Nullgv;
5f05dabc 570
8ebc5c01 571 /* defgv, aka *_ should be taken care of elsewhere */
572
8ebc5c01 573 /* clean up after study() */
3280af22
NIS		 574 SvREFCNT_dec(PL_lastscream);
575 PL_lastscream = Nullsv;
576 Safefree(PL_screamfirst);
577 PL_screamfirst = 0;
578 Safefree(PL_screamnext);
579 PL_screamnext = 0;
8ebc5c01 580
7d5ea4e7
GS		 581 /* float buffer */
582 Safefree(PL_efloatbuf);
583 PL_efloatbuf = Nullch;
584 PL_efloatsize = 0;
585
8ebc5c01 586 /* startup and shutdown function lists */
3280af22 587 SvREFCNT_dec(PL_beginav);
5a837c8f 588 SvREFCNT_dec(PL_beginav_save);
3280af22 589 SvREFCNT_dec(PL_endav);
7d30b5c4 590 SvREFCNT_dec(PL_checkav);
3280af22
NIS		 591 SvREFCNT_dec(PL_initav);
592 PL_beginav = Nullav;
5a837c8f 593 PL_beginav_save = Nullav;
3280af22 594 PL_endav = Nullav;
7d30b5c4 595 PL_checkav = Nullav;
3280af22 596 PL_initav = Nullav;
5618dfe8 597
8ebc5c01 598 /* shortcuts just get cleared */
3280af22 599 PL_envgv = Nullgv;
3280af22
NIS		 600 PL_incgv = Nullgv;
601 PL_hintgv = Nullgv;
602 PL_errgv = Nullgv;
603 PL_argvgv = Nullgv;
604 PL_argvoutgv = Nullgv;
605 PL_stdingv = Nullgv;
bf49b057 606 PL_stderrgv = Nullgv;
3280af22
NIS		 607 PL_last_in_gv = Nullgv;
608 PL_replgv = Nullgv;
5c831c24 609 PL_debstash = Nullhv;
8ebc5c01 610
611 /* reset so print() ends up where we expect */
612 setdefout(Nullgv);
5c831c24 613
7a1c5554
GS		 614 SvREFCNT_dec(PL_argvout_stack);
615 PL_argvout_stack = Nullav;
8ebc5c01 616
5c831c24
GS		 617 SvREFCNT_dec(PL_modglobal);
618 PL_modglobal = Nullhv;
619 SvREFCNT_dec(PL_preambleav);
620 PL_preambleav = Nullav;
621 SvREFCNT_dec(PL_subname);
622 PL_subname = Nullsv;
623 SvREFCNT_dec(PL_linestr);
624 PL_linestr = Nullsv;
625 SvREFCNT_dec(PL_pidstatus);
626 PL_pidstatus = Nullhv;
627 SvREFCNT_dec(PL_toptarget);
628 PL_toptarget = Nullsv;
629 SvREFCNT_dec(PL_bodytarget);
630 PL_bodytarget = Nullsv;
631 PL_formtarget = Nullsv;
632
d33b2eba 633 /* free locale stuff */
b9582b6a 634#ifdef USE_LOCALE_COLLATE
d33b2eba
GS		 635 Safefree(PL_collation_name);
636 PL_collation_name = Nullch;
b9582b6a 637#endif
d33b2eba 638
b9582b6a 639#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS		 640 Safefree(PL_numeric_name);
641 PL_numeric_name = Nullch;
a453c169 642 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 643#endif
d33b2eba 644
5c831c24
GS		 645 /* clear utf8 character classes */
646 SvREFCNT_dec(PL_utf8_alnum);
647 SvREFCNT_dec(PL_utf8_alnumc);
648 SvREFCNT_dec(PL_utf8_ascii);
649 SvREFCNT_dec(PL_utf8_alpha);
650 SvREFCNT_dec(PL_utf8_space);
651 SvREFCNT_dec(PL_utf8_cntrl);
652 SvREFCNT_dec(PL_utf8_graph);
653 SvREFCNT_dec(PL_utf8_digit);
654 SvREFCNT_dec(PL_utf8_upper);
655 SvREFCNT_dec(PL_utf8_lower);
656 SvREFCNT_dec(PL_utf8_print);
657 SvREFCNT_dec(PL_utf8_punct);
658 SvREFCNT_dec(PL_utf8_xdigit);
659 SvREFCNT_dec(PL_utf8_mark);
660 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 661 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 662 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 663 SvREFCNT_dec(PL_utf8_tofold);
5c831c24
GS		 664 PL_utf8_alnum = Nullsv;
665 PL_utf8_alnumc = Nullsv;
666 PL_utf8_ascii = Nullsv;
667 PL_utf8_alpha = Nullsv;
668 PL_utf8_space = Nullsv;
669 PL_utf8_cntrl = Nullsv;
670 PL_utf8_graph = Nullsv;
671 PL_utf8_digit = Nullsv;
672 PL_utf8_upper = Nullsv;
673 PL_utf8_lower = Nullsv;
674 PL_utf8_print = Nullsv;
675 PL_utf8_punct = Nullsv;
676 PL_utf8_xdigit = Nullsv;
677 PL_utf8_mark = Nullsv;
678 PL_utf8_toupper = Nullsv;
679 PL_utf8_totitle = Nullsv;
680 PL_utf8_tolower = Nullsv;
b4e400f9 681 PL_utf8_tofold = Nullsv;
5c831c24 682
971a9dd3
GS		 683 if (!specialWARN(PL_compiling.cop_warnings))
684 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 685 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS		 686 if (!specialCopIO(PL_compiling.cop_io))
687 SvREFCNT_dec(PL_compiling.cop_io);
688 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS		 689 CopFILE_free(&PL_compiling);
690 CopSTASH_free(&PL_compiling);
5c831c24 691
a0d0e21e 692 /* Prepare to destruct main symbol table. */
5f05dabc 693
3280af22
NIS		 694 hv = PL_defstash;
695 PL_defstash = 0;
a0d0e21e 696 SvREFCNT_dec(hv);
5c831c24
GS		 697 SvREFCNT_dec(PL_curstname);
698 PL_curstname = Nullsv;
a0d0e21e 699
5a844595
GS		 700 /* clear queued errors */
701 SvREFCNT_dec(PL_errors);
702 PL_errors = Nullsv;
703
a0d0e21e 704 FREETMPS;
0453d815 705 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 706 if (PL_scopestack_ix != 0)
0453d815
PM		 707 Perl_warner(aTHX_ WARN_INTERNAL,
708 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS		 709 (long)PL_scopestack_ix);
710 if (PL_savestack_ix != 0)
0453d815
PM		 711 Perl_warner(aTHX_ WARN_INTERNAL,
712 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS		 713 (long)PL_savestack_ix);
714 if (PL_tmps_floor != -1)
0453d815 715 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 716 (long)PL_tmps_floor + 1);
a0d0e21e 717 if (cxstack_ix != -1)
0453d815 718 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 719 (long)cxstack_ix + 1);
a0d0e21e 720 }
8990e307
LW		 721
722 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 723 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 724 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH		 725
726 /* the 2 is for PL_fdpid and PL_strtab */
727 while (PL_sv_count > 2 && sv_clean_all())
728 ;
729
d33b2eba
GS		 730 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
731 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS		 732 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
733 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 734
d4777f27
GS		 735 AvREAL_off(PL_fdpid); /* no surviving entries */
736 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS		 737 PL_fdpid = Nullav;
738
6c644e78
GS		 739#ifdef HAVE_INTERP_INTERN
740 sys_intern_clear();
741#endif
742
6e72f9df 743 /* Destruct the global string table. */
744 {
745 /* Yell and reset the HeVAL() slots that are still holding refcounts,
746 * so that sv_free() won't fail on them.
747 */
748 I32 riter;
749 I32 max;
750 HE *hent;
751 HE **array;
752
753 riter = 0;
3280af22
NIS		 754 max = HvMAX(PL_strtab);
755 array = HvARRAY(PL_strtab);
6e72f9df 756 hent = array[0];
757 for (;;) {
0453d815
PM		 758 if (hent && ckWARN_d(WARN_INTERNAL)) {
759 Perl_warner(aTHX_ WARN_INTERNAL,
760 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df 761 HeVAL(hent) - Nullsv, HeKEY(hent));
762 HeVAL(hent) = Nullsv;
763 hent = HeNEXT(hent);
764 }
765 if (!hent) {
766 if (++riter > max)
767 break;
768 hent = array[riter];
769 }
770 }
771 }
3280af22 772 SvREFCNT_dec(PL_strtab);
6e72f9df 773
e652bb2f 774#ifdef USE_ITHREADS
a0739874
DM		 775 /* free the pointer table used for cloning */
776 ptr_table_free(PL_ptr_table);
53186e96 777#endif
a0739874 778
d33b2eba
GS		 779 /* free special SVs */
780
781 SvREFCNT(&PL_sv_yes) = 0;
782 sv_clear(&PL_sv_yes);
783 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 784 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS		 785
786 SvREFCNT(&PL_sv_no) = 0;
787 sv_clear(&PL_sv_no);
788 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 789 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS		 790
791 SvREFCNT(&PL_sv_undef) = 0;
792 SvREADONLY_off(&PL_sv_undef);
d33b2eba 793
0453d815
PM		 794 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
795 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 796
56a2bab7 797#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS		 798 /* No more IO - including error messages ! */
799 PerlIO_cleanup(aTHX);
800#endif
801
3280af22 802 Safefree(PL_origfilename);
3280af22 803 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ		 804 if (PL_reg_curpm)
805 Safefree(PL_reg_curpm);
82ba1be6 806 Safefree(PL_reg_poscache);
3280af22
NIS		 807 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
808 Safefree(PL_op_mask);
cf36064f
GS		 809 Safefree(PL_psig_ptr);
810 Safefree(PL_psig_name);
2c2666fc 811 Safefree(PL_bitcount);
ce08f86c 812 Safefree(PL_psig_pend);
6e72f9df 813 nuke_stacks();
3280af22 814 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 815
a0d0e21e 816 DEBUG_P(debprofdump());
4d1ff10f 817#ifdef USE_5005THREADS
5f08fbcd 818 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS		 819 MUTEX_DESTROY(&PL_sv_mutex);
820 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 821 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 822 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 823 COND_DESTROY(&PL_eval_cond);
11d617a5
GS		 824#ifdef EMULATE_ATOMIC_REFCOUNTS
825 MUTEX_DESTROY(&PL_svref_mutex);
826#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 827
8023c3ce 828 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS		 829 Safefree(SvPVX(PL_thrsv));
830 Safefree(SvANY(PL_thrsv));
831 Safefree(PL_thrsv);
832 PL_thrsv = Nullsv;
4d1ff10f 833#endif /* USE_5005THREADS */
d33b2eba 834
e5dd39fc
AB		 835#ifdef USE_REENTRANT_API
836 Safefree(PL_reentrant_buffer->tmbuff);
837 Safefree(PL_reentrant_buffer);
838#endif
839
612f20c3
GS		 840 sv_free_arenas();
841
fc36a67e 842 /* As the absolutely last thing, free the non-arena SV for mess() */
843
3280af22 844 if (PL_mess_sv) {
9c63abab
GS		 845 /* it could have accumulated taint magic */
846 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
847 MAGIC* mg;
848 MAGIC* moremagic;
849 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
850 moremagic = mg->mg_moremagic;
14befaf4
DM		 851 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
852 && mg->mg_len >= 0)
9c63abab
GS		 853 Safefree(mg->mg_ptr);
854 Safefree(mg);
855 }
856 }
fc36a67e 857 /* we know that type >= SVt_PV */
155aba94 858 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS		 859 Safefree(SvPVX(PL_mess_sv));
860 Safefree(SvANY(PL_mess_sv));
861 Safefree(PL_mess_sv);
862 PL_mess_sv = Nullsv;
fc36a67e 863 }
31d77e54 864 return STATUS_NATIVE_EXPORT;
79072805
LW		 865}
866
954c1994
GS		 867/*
868=for apidoc perl_free
869
870Releases a Perl interpreter. See L<perlembed>.
871
872=cut
873*/
874
79072805 875void
0cb96387 876perl_free(pTHXx)
79072805 877{
acfe0abc 878#if defined(WIN32) || defined(NETWARE)
ce3e5b80 879# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS		 880# ifdef NETWARE
881 void *host = nw_internal_host;
882# else
883 void *host = w32_internal_host;
884# endif
ce3e5b80 885 PerlMem_free(aTHXx);
acfe0abc
GS		 886# ifdef NETWARE
887 nw5_delete_internal_host(host);
888# else
889 win32_delete_internal_host(host);
890# endif
1c0ca838
GS		 891# else
892 PerlMem_free(aTHXx);
893# endif
acfe0abc
GS		 894#else
895 PerlMem_free(aTHXx);
76e3520e 896#endif
79072805
LW		 897}
898
4b556e6c 899void
864dbfa3 900Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 901{
3280af22
NIS		 902 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
903 PL_exitlist[PL_exitlistlen].fn = fn;
904 PL_exitlist[PL_exitlistlen].ptr = ptr;
905 ++PL_exitlistlen;
4b556e6c
JD		 906}
907
954c1994
GS		 908/*
909=for apidoc perl_parse
910
911Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
912
913=cut
914*/
915
79072805 916int
0cb96387 917perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 918{
6224f72b 919 I32 oldscope;
6224f72b 920 int ret;
db36c5a1 921 dJMPENV;
4d1ff10f 922#ifdef USE_5005THREADS
cea2e8a9
GS		 923 dTHX;
924#endif
8d063cd8 925
a687059c
LW		 926#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
927#ifdef IAMSUID
928#undef IAMSUID
cea2e8a9 929 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW		 930setuid perl scripts securely.\n");
931#endif
932#endif
933
3280af22 934 PL_origargc = argc;
bc0a45ed
DM		 935 {
936 /* we copy rather than point to argv
937 * since perl_clone will copy and perl_destruct
3a1ee7e8 938 * has no way of knowing if we've made a copy or
bc0a45ed
DM		 939 * just point to argv
940 */
941 int i = PL_origargc;
942 New(0, PL_origargv, i+1, char*);
943 PL_origargv[i] = '\0';
944 while (i-- > 0) {
945 PL_origargv[i] = savepv(argv[i]);
946 }
947 }
948
0631ea03 949
a0d0e21e 950
3280af22 951 if (PL_do_undump) {
a0d0e21e
LW		 952
953 /* Come here if running an undumped a.out. */
954
3280af22
NIS		 955 PL_origfilename = savepv(argv[0]);
956 PL_do_undump = FALSE;
a0d0e21e 957 cxstack_ix = -1; /* start label stack again */
748a9306 958 init_ids();
a0d0e21e
LW		 959 init_postdump_symbols(argc,argv,env);
960 return 0;
961 }
962
3280af22
NIS		 963 if (PL_main_root) {
964 PL_curpad = AvARRAY(PL_comppad);
965 op_free(PL_main_root);
966 PL_main_root = Nullop;
ff0cee69 967 }
3280af22
NIS		 968 PL_main_start = Nullop;
969 SvREFCNT_dec(PL_main_cv);
970 PL_main_cv = Nullcv;
79072805 971
3280af22
NIS		 972 time(&PL_basetime);
973 oldscope = PL_scopestack_ix;
599cee73 974 PL_dowarn = G_WARN_OFF;
f86702cc 975
14dd3ad8
GS		 976#ifdef PERL_FLEXIBLE_EXCEPTIONS
977 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
978#else
979 JMPENV_PUSH(ret);
980#endif
6224f72b 981 switch (ret) {
312caa8e 982 case 0:
14dd3ad8
GS		 983#ifndef PERL_FLEXIBLE_EXCEPTIONS
984 parse_body(env,xsinit);
985#endif
7d30b5c4
GS		 986 if (PL_checkav)
987 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 988 ret = 0;
989 break;
6224f72b
GS		 990 case 1:
991 STATUS_ALL_FAILURE;
992 /* FALL THROUGH */
993 case 2:
994 /* my_exit() was called */
3280af22 995 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 996 LEAVE;
997 FREETMPS;
3280af22 998 PL_curstash = PL_defstash;
7d30b5c4
GS		 999 if (PL_checkav)
1000 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 1001 ret = STATUS_NATIVE_EXPORT;
1002 break;
6224f72b 1003 case 3:
bf49b057 1004 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS		 1005 ret = 1;
1006 break;
6224f72b 1007 }
14dd3ad8
GS		 1008 JMPENV_POP;
1009 return ret;
1010}
1011
1012#ifdef PERL_FLEXIBLE_EXCEPTIONS
1013STATIC void *
1014S_vparse_body(pTHX_ va_list args)
1015{
1016 char **env = va_arg(args, char**);
1017 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1018
1019 return parse_body(env, xsinit);
312caa8e 1020}
14dd3ad8 1021#endif
312caa8e
CS		 1022
1023STATIC void *
14dd3ad8 1024S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1025{
312caa8e
CS		 1026 int argc = PL_origargc;
1027 char **argv = PL_origargv;
312caa8e
CS		 1028 char *scriptname = NULL;
1029 int fdscript = -1;
1030 VOL bool dosearch = FALSE;
1031 char *validarg = "";
1032 AV* comppadlist;
1033 register SV *sv;
1034 register char *s;
cf756827 1035 char *cddir = Nullch;
312caa8e 1036
3280af22 1037 sv_setpvn(PL_linestr,"",0);
79cb57f6 1038 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS		 1039 SAVEFREESV(sv);
1040 init_main_stash();
54310121 1041
6224f72b
GS		 1042 for (argc--,argv++; argc > 0; argc--,argv++) {
1043 if (argv[0][0] != '-' || !argv[0][1])
1044 break;
1045#ifdef DOSUID
1046 if (*validarg)
1047 validarg = " PHOOEY ";
1048 else
1049 validarg = argv[0];
13281fa4 1050#endif
6224f72b
GS		 1051 s = argv[0]+1;
1052 reswitch:
1053 switch (*s) {
729a02f2
GS		 1054 case 'C':
1055#ifdef WIN32
c0932edc 1056 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS		 1057 /* FALL THROUGH */
1058#endif
1d5472a9
GS		 1059#ifndef PERL_STRICT_CR
1060 case '\r':
1061#endif
6224f72b
GS		 1062 case ' ':
1063 case '0':
1064 case 'F':
1065 case 'a':
1066 case 'c':
1067 case 'd':
1068 case 'D':
1069 case 'h':
1070 case 'i':
1071 case 'l':
1072 case 'M':
1073 case 'm':
1074 case 'n':
1075 case 'p':
1076 case 's':
1077 case 'u':
1078 case 'U':
1079 case 'v':
599cee73
PM		 1080 case 'W':
1081 case 'X':
6224f72b 1082 case 'w':
155aba94 1083 if ((s = moreswitches(s)))
6224f72b
GS		 1084 goto reswitch;
1085 break;
33b78306 1086
1dbad523 1087 case 't':
317ea90d
MS		 1088 if( !PL_tainting ) {
1089 PL_taint_warn = TRUE;
1090 PL_tainting = TRUE;
1091 }
1092 s++;
1093 goto reswitch;
6224f72b 1094 case 'T':
3280af22 1095 PL_tainting = TRUE;
317ea90d 1096 PL_taint_warn = FALSE;
6224f72b
GS		 1097 s++;
1098 goto reswitch;
f86702cc 1099
6224f72b 1100 case 'e':
bf4acbe4
GS		 1101#ifdef MACOS_TRADITIONAL
1102 /* ignore -e for Dev:Pseudo argument */
1103 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1104 break;
bf4acbe4 1105#endif
3280af22 1106 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1107 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1108 if (!PL_e_script) {
79cb57f6 1109 PL_e_script = newSVpvn("",0);
0cb96387 1110 filter_add(read_e_script, NULL);
6224f72b
GS		 1111 }
1112 if (*++s)
3280af22 1113 sv_catpv(PL_e_script, s);
6224f72b 1114 else if (argv[1]) {
3280af22 1115 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS		 1116 argc--,argv++;
1117 }
1118 else
cea2e8a9 1119 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1120 sv_catpv(PL_e_script, "\n");
6224f72b 1121 break;
afe37c7d 1122
6224f72b
GS		 1123 case 'I': /* -I handled both here and in moreswitches() */
1124 forbid_setid("-I");
1125 if (!*++s && (s=argv[1]) != Nullch) {
1126 argc--,argv++;
1127 }
6224f72b 1128 if (s && *s) {
0df16ed7
GS		 1129 char *p;
1130 STRLEN len = strlen(s);
1131 p = savepvn(s, len);
9c8a64f0 1132 incpush(p, TRUE, TRUE);
0df16ed7
GS		 1133 sv_catpvn(sv, "-I", 2);
1134 sv_catpvn(sv, p, len);
1135 sv_catpvn(sv, " ", 1);
6224f72b 1136 Safefree(p);
0df16ed7
GS		 1137 }
1138 else
a67e862a 1139 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS		 1140 break;
1141 case 'P':
1142 forbid_setid("-P");
3280af22 1143 PL_preprocess = TRUE;
6224f72b
GS		 1144 s++;
1145 goto reswitch;
1146 case 'S':
1147 forbid_setid("-S");
1148 dosearch = TRUE;
1149 s++;
1150 goto reswitch;
1151 case 'V':
3280af22
NIS		 1152 if (!PL_preambleav)
1153 PL_preambleav = newAV();
1154 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1155 if (*++s != ':') {
3280af22 1156 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1157#ifdef VMS
6b88bc9c 1158 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1159#else
3280af22 1160 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1161#endif
3280af22 1162 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1163# ifdef DEBUGGING
3280af22 1164 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1165# endif
6224f72b 1166# ifdef MULTIPLICITY
8f872242 1167 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1168# endif
4d1ff10f
AB		 1169# ifdef USE_5005THREADS
1170 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1171# endif
ac5e8965
JH		 1172# ifdef USE_ITHREADS
1173 sv_catpv(PL_Sv," USE_ITHREADS");
1174# endif
10cc9d2a
JH		 1175# ifdef USE_64_BIT_INT
1176 sv_catpv(PL_Sv," USE_64_BIT_INT");
1177# endif
1178# ifdef USE_64_BIT_ALL
1179 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH		 1180# endif
1181# ifdef USE_LONG_DOUBLE
1182 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1183# endif
53430762
JH		 1184# ifdef USE_LARGE_FILES
1185 sv_catpv(PL_Sv," USE_LARGE_FILES");
1186# endif
ac5e8965
JH		 1187# ifdef USE_SOCKS
1188 sv_catpv(PL_Sv," USE_SOCKS");
1189# endif
b363f7ed
GS		 1190# ifdef PERL_IMPLICIT_CONTEXT
1191 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1192# endif
1193# ifdef PERL_IMPLICIT_SYS
1194 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1195# endif
3280af22 1196 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1197
6224f72b
GS		 1198#if defined(LOCAL_PATCH_COUNT)
1199 if (LOCAL_PATCH_COUNT > 0) {
1200 int i;
3280af22 1201 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1202 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1203 if (PL_localpatches[i])
cea2e8a9 1204 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS		 1205 }
1206 }
1207#endif
cea2e8a9 1208 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS		 1209#ifdef __DATE__
1210# ifdef __TIME__
cea2e8a9 1211 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1212# else
cea2e8a9 1213 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS		 1214# endif
1215#endif
3280af22 1216 sv_catpv(PL_Sv, "; \
6224f72b 1217$\"=\"\\n \"; \
69fcd688
JH		 1218@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1219#ifdef __CYGWIN__
1220 sv_catpv(PL_Sv,"\
1221push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1222#endif
1223 sv_catpv(PL_Sv, "\
6224f72b
GS		 1224print \" \\%ENV:\\n @env\\n\" if @env; \
1225print \" \\@INC:\\n @INC\\n\";");
1226 }
1227 else {
3280af22
NIS		 1228 PL_Sv = newSVpv("config_vars(qw(",0);
1229 sv_catpv(PL_Sv, ++s);
1230 sv_catpv(PL_Sv, "))");
6224f72b
GS		 1231 s += strlen(s);
1232 }
3280af22 1233 av_push(PL_preambleav, PL_Sv);
6224f72b
GS		 1234 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1235 goto reswitch;
1236 case 'x':
3280af22 1237 PL_doextract = TRUE;
6224f72b
GS		 1238 s++;
1239 if (*s)
f4c556ac 1240 cddir = s;
6224f72b
GS		 1241 break;
1242 case 0:
1243 break;
1244 case '-':
1245 if (!*++s || isSPACE(*s)) {
1246 argc--,argv++;
1247 goto switch_end;
1248 }
1249 /* catch use of gnu style long options */
1250 if (strEQ(s, "version")) {
1251 s = "v";
1252 goto reswitch;
1253 }
1254 if (strEQ(s, "help")) {
1255 s = "h";
1256 goto reswitch;
1257 }
1258 s--;
1259 /* FALL THROUGH */
1260 default:
cea2e8a9 1261 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW		 1262 }
1263 }
6224f72b 1264 switch_end:
54310121 1265
f675dbe5
CB		 1266 if (
1267#ifndef SECURE_INTERNAL_GETENV
1268 !PL_tainting &&
1269#endif
cf756827 1270 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1271 {
cf756827 1272 char *popt = s;
74288ac8
GS		 1273 while (isSPACE(*s))
1274 s++;
317ea90d 1275 if (*s == '-' && *(s+1) == 'T') {
74288ac8 1276 PL_tainting = TRUE;
317ea90d
MS		 1277 PL_taint_warn = FALSE;
1278 }
74288ac8 1279 else {
cf756827 1280 char *popt_copy = Nullch;
74288ac8 1281 while (s && *s) {
4ea8f8fb 1282 char *d;
74288ac8
GS		 1283 while (isSPACE(*s))
1284 s++;
1285 if (*s == '-') {
1286 s++;
1287 if (isSPACE(*s))
1288 continue;
1289 }
4ea8f8fb 1290 d = s;
74288ac8
GS		 1291 if (!*s)
1292 break;
1c4db469 1293 if (!strchr("DIMUdmtw", *s))
cea2e8a9 1294 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS		 1295 while (++s && *s) {
1296 if (isSPACE(*s)) {
cf756827
GS		 1297 if (!popt_copy) {
1298 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1299 s = popt_copy + (s - popt);
1300 d = popt_copy + (d - popt);
1301 }
4ea8f8fb
MS		 1302 *s++ = '\0';
1303 break;
1304 }
1305 }
1c4db469 1306 if (*d == 't') {
317ea90d
MS		 1307 if( !PL_tainting ) {
1308 PL_taint_warn = TRUE;
1309 PL_tainting = TRUE;
1310 }
1c4db469
RGS		 1311 } else {
1312 moreswitches(d);
1313 }
6224f72b 1314 }
6224f72b
GS		 1315 }
1316 }
a0d0e21e 1317
317ea90d
MS		 1318 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1319 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1320 }
1321
6224f72b
GS		 1322 if (!scriptname)
1323 scriptname = argv[0];
3280af22 1324 if (PL_e_script) {
6224f72b
GS		 1325 argc++,argv--;
1326 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1327 }
1328 else if (scriptname == Nullch) {
1329#ifdef MSDOS
1330 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1331 moreswitches("h");
1332#endif
1333 scriptname = "-";
1334 }
1335
1336 init_perllib();
1337
1338 open_script(scriptname,dosearch,sv,&fdscript);
1339
1340 validate_suid(validarg, scriptname,fdscript);
1341
64ca3a65 1342#ifndef PERL_MICRO
0b5b802d
GS		 1343#if defined(SIGCHLD) || defined(SIGCLD)
1344 {
1345#ifndef SIGCHLD
1346# define SIGCHLD SIGCLD
1347#endif
1348 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1349 if (sigstate == SIG_IGN) {
1350 if (ckWARN(WARN_SIGNAL))
1351 Perl_warner(aTHX_ WARN_SIGNAL,
1352 "Can't ignore signal CHLD, forcing to default");
1353 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1354 }
1355 }
1356#endif
64ca3a65 1357#endif
0b5b802d 1358
bf4acbe4
GS		 1359#ifdef MACOS_TRADITIONAL
1360 if (PL_doextract || gMacPerl_AlwaysExtract) {
1361#else
f4c556ac 1362 if (PL_doextract) {
bf4acbe4 1363#endif
6224f72b 1364 find_beginning();
f4c556ac
GS		 1365 if (cddir && PerlDir_chdir(cddir) < 0)
1366 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1367
1368 }
6224f72b 1369
3280af22
NIS		 1370 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1371 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1372 CvUNIQUE_on(PL_compcv);
1373
1374 PL_comppad = newAV();
1375 av_push(PL_comppad, Nullsv);
1376 PL_curpad = AvARRAY(PL_comppad);
1377 PL_comppad_name = newAV();
1378 PL_comppad_name_fill = 0;
1379 PL_min_intro_pending = 0;
1380 PL_padix = 0;
4d1ff10f 1381#ifdef USE_5005THREADS
79cb57f6 1382 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS		 1383 PL_curpad[0] = (SV*)newAV();
1384 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1385 CvOWNER(PL_compcv) = 0;
1386 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1387 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1388#endif /* USE_5005THREADS */
6224f72b
GS		 1389
1390 comppadlist = newAV();
1391 AvREAL_off(comppadlist);
3280af22
NIS		 1392 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1393 av_store(comppadlist, 1, (SV*)PL_comppad);
1394 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1395
0c4f7ff0 1396 boot_core_PerlIO();
6224f72b 1397 boot_core_UNIVERSAL();
9a34ef1d 1398#ifndef PERL_MICRO
09bef843 1399 boot_core_xsutils();
9a34ef1d 1400#endif
6224f72b
GS		 1401
1402 if (xsinit)
acfe0abc 1403 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1404#ifndef PERL_MICRO
ed79a026 1405#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1406 init_os_extras();
6224f72b 1407#endif
64ca3a65 1408#endif
6224f72b 1409
29209bc5 1410#ifdef USE_SOCKS
1b9c9cf5
DH		 1411# ifdef HAS_SOCKS5_INIT
1412 socks5_init(argv[0]);
1413# else
29209bc5 1414 SOCKSinit(argv[0]);
1b9c9cf5 1415# endif
ac27b0f5 1416#endif
29209bc5 1417
6224f72b
GS		 1418 init_predump_symbols();
1419 /* init_postdump_symbols not currently designed to be called */
1420 /* more than once (ENV isn't cleared first, for example) */
1421 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1422 if (!PL_do_undump)
6224f72b
GS		 1423 init_postdump_symbols(argc,argv,env);
1424
1425 init_lexer();
1426
1427 /* now parse the script */
1428
91487cfc 1429 SETERRNO(0,SS$_NORMAL);
3280af22 1430 PL_error_count = 0;
bf4acbe4
GS		 1431#ifdef MACOS_TRADITIONAL
1432 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1433 if (PL_minus_c)
1434 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1435 else {
1436 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1437 MacPerl_MPWFileName(PL_origfilename));
1438 }
1439 }
1440#else
3280af22
NIS		 1441 if (yyparse() || PL_error_count) {
1442 if (PL_minus_c)
cea2e8a9 1443 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1444 else {
cea2e8a9 1445 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1446 PL_origfilename);
6224f72b
GS		 1447 }
1448 }
bf4acbe4 1449#endif
57843af0 1450 CopLINE_set(PL_curcop, 0);
3280af22
NIS		 1451 PL_curstash = PL_defstash;
1452 PL_preprocess = FALSE;
1453 if (PL_e_script) {
1454 SvREFCNT_dec(PL_e_script);
1455 PL_e_script = Nullsv;
6224f72b
GS		 1456 }
1457
8bfdd7d9
HS		 1458/*
1459 Not sure that this is still the right place to do this now that we
1460 no longer use PL_nrs. HVDS 2001/09/09
1461*/
864dbfa3 1462 sv_setsv(get_sv("/", TRUE), PL_rs);
8bfdd7d9 1463
3280af22 1464 if (PL_do_undump)
6224f72b
GS		 1465 my_unexec();
1466
57843af0
GS		 1467 if (isWARN_ONCE) {
1468 SAVECOPFILE(PL_curcop);
1469 SAVECOPLINE(PL_curcop);
3280af22 1470 gv_check(PL_defstash);
57843af0 1471 }
6224f72b
GS		 1472
1473 LEAVE;
1474 FREETMPS;
1475
1476#ifdef MYMALLOC
1477 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1478 dump_mstats("after compilation:");
1479#endif
1480
1481 ENTER;
3280af22 1482 PL_restartop = 0;
312caa8e 1483 return NULL;
6224f72b
GS		 1484}
1485
954c1994
GS		 1486/*
1487=for apidoc perl_run
1488
1489Tells a Perl interpreter to run. See L<perlembed>.
1490
1491=cut
1492*/
1493
6224f72b 1494int
0cb96387 1495perl_run(pTHXx)
6224f72b 1496{
6224f72b 1497 I32 oldscope;
14dd3ad8 1498 int ret = 0;
db36c5a1 1499 dJMPENV;
4d1ff10f 1500#ifdef USE_5005THREADS
cea2e8a9
GS		 1501 dTHX;
1502#endif
6224f72b 1503
3280af22 1504 oldscope = PL_scopestack_ix;
96e176bf
CL		 1505#ifdef VMS
1506 VMSISH_HUSHED = 0;
1507#endif
6224f72b 1508
14dd3ad8 1509#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1510 redo_body:
14dd3ad8
GS		 1511 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1512#else
1513 JMPENV_PUSH(ret);
1514#endif
6224f72b
GS		 1515 switch (ret) {
1516 case 1:
1517 cxstack_ix = -1; /* start context stack again */
312caa8e 1518 goto redo_body;
14dd3ad8
GS		 1519 case 0: /* normal completion */
1520#ifndef PERL_FLEXIBLE_EXCEPTIONS
1521 redo_body:
1522 run_body(oldscope);
1523#endif
1524 /* FALL THROUGH */
1525 case 2: /* my_exit() */
3280af22 1526 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1527 LEAVE;
1528 FREETMPS;
3280af22 1529 PL_curstash = PL_defstash;
3a1ee7e8 1530 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB		 1531 PL_endav && !PL_minus_c)
1532 call_list(oldscope, PL_endav);
6224f72b
GS		 1533#ifdef MYMALLOC
1534 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1535 dump_mstats("after execution: ");
1536#endif
14dd3ad8
GS		 1537 ret = STATUS_NATIVE_EXPORT;
1538 break;
6224f72b 1539 case 3:
312caa8e
CS		 1540 if (PL_restartop) {
1541 POPSTACK_TO(PL_mainstack);
1542 goto redo_body;
6224f72b 1543 }
bf49b057 1544 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1545 FREETMPS;
14dd3ad8
GS		 1546 ret = 1;
1547 break;
6224f72b
GS		 1548 }
1549
14dd3ad8
GS		 1550 JMPENV_POP;
1551 return ret;
312caa8e
CS		 1552}
1553
14dd3ad8 1554#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1555STATIC void *
14dd3ad8 1556S_vrun_body(pTHX_ va_list args)
312caa8e 1557{
312caa8e
CS		 1558 I32 oldscope = va_arg(args, I32);
1559
14dd3ad8
GS		 1560 return run_body(oldscope);
1561}
1562#endif
1563
1564
1565STATIC void *
1566S_run_body(pTHX_ I32 oldscope)
1567{
6224f72b 1568 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1569 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1570
3280af22 1571 if (!PL_restartop) {
6224f72b
GS		 1572 DEBUG_x(dump_all());
1573 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH		 1574 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1575 PTR2UV(thr)));
6224f72b 1576
3280af22 1577 if (PL_minus_c) {
bf4acbe4 1578#ifdef MACOS_TRADITIONAL
be708cc0 1579 PerlIO_printf(Perl_error_log, "# %s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1580#else
bf49b057 1581 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1582#endif
6224f72b
GS		 1583 my_exit(0);
1584 }
3280af22 1585 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1586 sv_setiv(PL_DBsingle, 1);
3280af22
NIS		 1587 if (PL_initav)
1588 call_list(oldscope, PL_initav);
6224f72b
GS		 1589 }
1590
1591 /* do it */
1592
3280af22 1593 if (PL_restartop) {
533c011a 1594 PL_op = PL_restartop;
3280af22 1595 PL_restartop = 0;
cea2e8a9 1596 CALLRUNOPS(aTHX);
6224f72b 1597 }
3280af22
NIS		 1598 else if (PL_main_start) {
1599 CvDEPTH(PL_main_cv) = 1;
533c011a 1600 PL_op = PL_main_start;
cea2e8a9 1601 CALLRUNOPS(aTHX);
6224f72b
GS		 1602 }
1603
f6b3007c
JH		 1604 my_exit(0);
1605 /* NOTREACHED */
312caa8e 1606 return NULL;
6224f72b
GS		 1607}
1608
954c1994 1609/*
ccfc67b7
JH		 1610=head1 SV Manipulation Functions
1611
954c1994
GS		 1612=for apidoc p||get_sv
1613
1614Returns the SV of the specified Perl scalar. If C<create> is set and the
1615Perl variable does not exist then it will be created. If C<create> is not
1616set and the variable does not exist then NULL is returned.
1617
1618=cut
1619*/
1620
6224f72b 1621SV*
864dbfa3 1622Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS		 1623{
1624 GV *gv;
4d1ff10f 1625#ifdef USE_5005THREADS
6224f72b
GS		 1626 if (name[1] == '\0' && !isALPHA(name[0])) {
1627 PADOFFSET tmp = find_threadsv(name);
411caa50 1628 if (tmp != NOT_IN_PAD)
6224f72b 1629 return THREADSV(tmp);
6224f72b 1630 }
4d1ff10f 1631#endif /* USE_5005THREADS */
6224f72b
GS		 1632 gv = gv_fetchpv(name, create, SVt_PV);
1633 if (gv)
1634 return GvSV(gv);
1635 return Nullsv;
1636}
1637
954c1994 1638/*
ccfc67b7
JH		 1639=head1 Array Manipulation Functions
1640
954c1994
GS		 1641=for apidoc p||get_av
1642
1643Returns the AV of the specified Perl array. If C<create> is set and the
1644Perl variable does not exist then it will be created. If C<create> is not
1645set and the variable does not exist then NULL is returned.
1646
1647=cut
1648*/
1649
6224f72b 1650AV*
864dbfa3 1651Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS		 1652{
1653 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1654 if (create)
1655 return GvAVn(gv);
1656 if (gv)
1657 return GvAV(gv);
1658 return Nullav;
1659}
1660
954c1994 1661/*
ccfc67b7
JH		 1662=head1 Hash Manipulation Functions
1663
954c1994
GS		 1664=for apidoc p||get_hv
1665
1666Returns the HV of the specified Perl hash. If C<create> is set and the
1667Perl variable does not exist then it will be created. If C<create> is not
1668set and the variable does not exist then NULL is returned.
1669
1670=cut
1671*/
1672
6224f72b 1673HV*
864dbfa3 1674Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1675{
a0d0e21e
LW		 1676 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1677 if (create)
1678 return GvHVn(gv);
1679 if (gv)
1680 return GvHV(gv);
1681 return Nullhv;
1682}
1683
954c1994 1684/*
ccfc67b7
JH		 1685=head1 CV Manipulation Functions
1686
954c1994
GS		 1687=for apidoc p||get_cv
1688
1689Returns the CV of the specified Perl subroutine. If C<create> is set and
1690the Perl subroutine does not exist then it will be declared (which has the
1691same effect as saying C<sub name;>). If C<create> is not set and the
1692subroutine does not exist then NULL is returned.
1693
1694=cut
1695*/
1696
a0d0e21e 1697CV*
864dbfa3 1698Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW		 1699{
1700 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1701 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS		 1702 /* XXX this is probably not what they think they're getting.
1703 * It has the same effect as "sub name;", i.e. just a forward
1704 * declaration! */
8ebc5c01 1705 if (create && !GvCVu(gv))
774d564b 1706 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1707 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1708 Nullop,
a0d0e21e
LW		 1709 Nullop);
1710 if (gv)
8ebc5c01 1711 return GvCVu(gv);
a0d0e21e
LW		 1712 return Nullcv;
1713}
1714
79072805
LW		 1715/* Be sure to refetch the stack pointer after calling these routines. */
1716
954c1994 1717/*
ccfc67b7
JH		 1718
1719=head1 Callback Functions
1720
954c1994
GS		 1721=for apidoc p||call_argv
1722
1723Performs a callback to the specified Perl sub. See L<perlcall>.
1724
1725=cut
1726*/
1727
a0d0e21e 1728I32
864dbfa3 1729Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1730
8ac85365
NIS		 1731 /* See G_* flags in cop.h */
1732 /* null terminated arg list */
8990e307 1733{
a0d0e21e 1734 dSP;
8990e307 1735
924508f0 1736 PUSHMARK(SP);
a0d0e21e 1737 if (argv) {
8990e307 1738 while (*argv) {
a0d0e21e 1739 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW		 1740 argv++;
1741 }
a0d0e21e 1742 PUTBACK;
8990e307 1743 }
864dbfa3 1744 return call_pv(sub_name, flags);
8990e307
LW		 1745}
1746
954c1994
GS		 1747/*
1748=for apidoc p||call_pv
1749
1750Performs a callback to the specified Perl sub. See L<perlcall>.
1751
1752=cut
1753*/
1754
a0d0e21e 1755I32
864dbfa3 1756Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS		 1757 /* name of the subroutine */
1758 /* See G_* flags in cop.h */
a0d0e21e 1759{
864dbfa3 1760 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW		 1761}
1762
954c1994
GS		 1763/*
1764=for apidoc p||call_method
1765
1766Performs a callback to the specified Perl method. The blessed object must
1767be on the stack. See L<perlcall>.
1768
1769=cut
1770*/
1771
a0d0e21e 1772I32
864dbfa3 1773Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS		 1774 /* name of the subroutine */
1775 /* See G_* flags in cop.h */
a0d0e21e 1776{
968b3946 1777 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW		 1778}
1779
1780/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS		 1781/*
1782=for apidoc p||call_sv
1783
1784Performs a callback to the Perl sub whose name is in the SV. See
1785L<perlcall>.
1786
1787=cut
1788*/
1789
a0d0e21e 1790I32
864dbfa3 1791Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1792 /* See G_* flags in cop.h */
a0d0e21e 1793{
924508f0 1794 dSP;
a0d0e21e 1795 LOGOP myop; /* fake syntax tree node */
968b3946 1796 UNOP method_op;
aa689395 1797 I32 oldmark;
13689cfe 1798 volatile I32 retval = 0;
a0d0e21e 1799 I32 oldscope;
54310121 1800 bool oldcatch = CATCH_GET;
6224f72b 1801 int ret;
533c011a 1802 OP* oldop = PL_op;
db36c5a1 1803 dJMPENV;
1e422769 1804
a0d0e21e
LW		 1805 if (flags & G_DISCARD) {
1806 ENTER;
1807 SAVETMPS;
1808 }
1809
aa689395 1810 Zero(&myop, 1, LOGOP);
54310121 1811 myop.op_next = Nullop;
f51d4af5 1812 if (!(flags & G_NOARGS))
aa689395 1813 myop.op_flags |= OPf_STACKED;
54310121 1814 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1815 (flags & G_ARRAY) ? OPf_WANT_LIST :
1816 OPf_WANT_SCALAR);
462e5cf6 1817 SAVEOP();
533c011a 1818 PL_op = (OP*)&myop;
aa689395 1819
3280af22
NIS		 1820 EXTEND(PL_stack_sp, 1);
1821 *++PL_stack_sp = sv;
aa689395 1822 oldmark = TOPMARK;
3280af22 1823 oldscope = PL_scopestack_ix;
a0d0e21e 1824
3280af22 1825 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1826 /* Handle first BEGIN of -d. */
3280af22 1827 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24 1828 /* Try harder, since this may have been a sighandler, thus
1829 * curstash may be meaningless. */
3280af22 1830 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1831 && !(flags & G_NODEBUG))
533c011a 1832 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1833
968b3946
GS		 1834 if (flags & G_METHOD) {
1835 Zero(&method_op, 1, UNOP);
1836 method_op.op_next = PL_op;
1837 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1838 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1839 PL_op = (OP*)&method_op;
968b3946
GS		 1840 }
1841
312caa8e 1842 if (!(flags & G_EVAL)) {
0cdb2077 1843 CATCH_SET(TRUE);
14dd3ad8 1844 call_body((OP*)&myop, FALSE);
312caa8e 1845 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1846 CATCH_SET(oldcatch);
312caa8e
CS		 1847 }
1848 else {
d78bda3d 1849 myop.op_other = (OP*)&myop;
3280af22 1850 PL_markstack_ptr--;
4633a7c4
LW		 1851 /* we're trying to emulate pp_entertry() here */
1852 {
c09156bb 1853 register PERL_CONTEXT *cx;
54310121 1854 I32 gimme = GIMME_V;
ac27b0f5 1855
4633a7c4
LW		 1856 ENTER;
1857 SAVETMPS;
ac27b0f5 1858
968b3946 1859 push_return(Nullop);
1d76a5c3 1860 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1861 PUSHEVAL(cx, 0, 0);
533c011a 1862 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1863
faef0170 1864 PL_in_eval = EVAL_INEVAL;
4633a7c4 1865 if (flags & G_KEEPERR)
faef0170 1866 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1867 else
38a03e6e 1868 sv_setpv(ERRSV,"");
4633a7c4 1869 }
3280af22 1870 PL_markstack_ptr++;
a0d0e21e 1871
14dd3ad8
GS		 1872#ifdef PERL_FLEXIBLE_EXCEPTIONS
1873 redo_body:
1874 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1875 (OP*)&myop, FALSE);
14dd3ad8
GS		 1876#else
1877 JMPENV_PUSH(ret);
1878#endif
6224f72b
GS		 1879 switch (ret) {
1880 case 0:
14dd3ad8
GS		 1881#ifndef PERL_FLEXIBLE_EXCEPTIONS
1882 redo_body:
1883 call_body((OP*)&myop, FALSE);
1884#endif
312caa8e
CS		 1885 retval = PL_stack_sp - (PL_stack_base + oldmark);
1886 if (!(flags & G_KEEPERR))
1887 sv_setpv(ERRSV,"");
a0d0e21e 1888 break;
6224f72b 1889 case 1:
f86702cc 1890 STATUS_ALL_FAILURE;
a0d0e21e 1891 /* FALL THROUGH */
6224f72b 1892 case 2:
a0d0e21e 1893 /* my_exit() was called */
3280af22 1894 PL_curstash = PL_defstash;
a0d0e21e 1895 FREETMPS;
14dd3ad8 1896 JMPENV_POP;
cc3604b1 1897 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1898 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1899 my_exit_jump();
a0d0e21e 1900 /* NOTREACHED */
6224f72b 1901 case 3:
3280af22 1902 if (PL_restartop) {
533c011a 1903 PL_op = PL_restartop;
3280af22 1904 PL_restartop = 0;
312caa8e 1905 goto redo_body;
a0d0e21e 1906 }
3280af22 1907 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1908 if (flags & G_ARRAY)
1909 retval = 0;
1910 else {
1911 retval = 1;
3280af22 1912 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1913 }
312caa8e 1914 break;
a0d0e21e 1915 }
a0d0e21e 1916
3280af22 1917 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW		 1918 SV **newsp;
1919 PMOP *newpm;
1920 I32 gimme;
c09156bb 1921 register PERL_CONTEXT *cx;
a0a2876f
LW		 1922 I32 optype;
1923
1924 POPBLOCK(cx,newpm);
1925 POPEVAL(cx);
1926 pop_return();
3280af22 1927 PL_curpm = newpm;
a0a2876f 1928 LEAVE;
a0d0e21e 1929 }
14dd3ad8 1930 JMPENV_POP;
a0d0e21e 1931 }
1e422769 1932
a0d0e21e 1933 if (flags & G_DISCARD) {
3280af22 1934 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1935 retval = 0;
1936 FREETMPS;
1937 LEAVE;
1938 }
533c011a 1939 PL_op = oldop;
a0d0e21e
LW		 1940 return retval;
1941}
1942
14dd3ad8 1943#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1944STATIC void *
14dd3ad8 1945S_vcall_body(pTHX_ va_list args)
312caa8e
CS		 1946{
1947 OP *myop = va_arg(args, OP*);
1948 int is_eval = va_arg(args, int);
1949
14dd3ad8 1950 call_body(myop, is_eval);
312caa8e
CS		 1951 return NULL;
1952}
14dd3ad8 1953#endif
312caa8e
CS		 1954
1955STATIC void
14dd3ad8 1956S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1957{
312caa8e
CS		 1958 if (PL_op == myop) {
1959 if (is_eval)
f807eda9 1960 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1961 else
f807eda9 1962 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS		 1963 }
1964 if (PL_op)
cea2e8a9 1965 CALLRUNOPS(aTHX);
312caa8e
CS		 1966}
1967
6e72f9df 1968/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1969
954c1994
GS		 1970/*
1971=for apidoc p||eval_sv
1972
1973Tells Perl to C<eval> the string in the SV.
1974
1975=cut
1976*/
1977
a0d0e21e 1978I32
864dbfa3 1979Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1980
8ac85365 1981 /* See G_* flags in cop.h */
a0d0e21e 1982{
924508f0 1983 dSP;
a0d0e21e 1984 UNOP myop; /* fake syntax tree node */
8fa7f367 1985 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1986 volatile I32 retval = 0;
4633a7c4 1987 I32 oldscope;
6224f72b 1988 int ret;
533c011a 1989 OP* oldop = PL_op;
db36c5a1 1990 dJMPENV;
84902520 1991
4633a7c4
LW		 1992 if (flags & G_DISCARD) {
1993 ENTER;
1994 SAVETMPS;
1995 }
1996
462e5cf6 1997 SAVEOP();
533c011a
NIS		 1998 PL_op = (OP*)&myop;
1999 Zero(PL_op, 1, UNOP);
3280af22
NIS		 2000 EXTEND(PL_stack_sp, 1);
2001 *++PL_stack_sp = sv;
2002 oldscope = PL_scopestack_ix;
79072805 2003
4633a7c4
LW		 2004 if (!(flags & G_NOARGS))
2005 myop.op_flags = OPf_STACKED;
79072805 2006 myop.op_next = Nullop;
6e72f9df 2007 myop.op_type = OP_ENTEREVAL;
54310121 2008 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2009 (flags & G_ARRAY) ? OPf_WANT_LIST :
2010 OPf_WANT_SCALAR);
6e72f9df 2011 if (flags & G_KEEPERR)
2012 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2013
14dd3ad8 2014#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2015 redo_body:
14dd3ad8 2016 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2017 (OP*)&myop, TRUE);
14dd3ad8
GS		 2018#else
2019 JMPENV_PUSH(ret);
2020#endif
6224f72b
GS		 2021 switch (ret) {
2022 case 0:
14dd3ad8
GS		 2023#ifndef PERL_FLEXIBLE_EXCEPTIONS
2024 redo_body:
2025 call_body((OP*)&myop,TRUE);
2026#endif
312caa8e
CS		 2027 retval = PL_stack_sp - (PL_stack_base + oldmark);
2028 if (!(flags & G_KEEPERR))
2029 sv_setpv(ERRSV,"");
4633a7c4 2030 break;
6224f72b 2031 case 1:
f86702cc 2032 STATUS_ALL_FAILURE;
4633a7c4 2033 /* FALL THROUGH */
6224f72b 2034 case 2:
4633a7c4 2035 /* my_exit() was called */
3280af22 2036 PL_curstash = PL_defstash;
4633a7c4 2037 FREETMPS;
14dd3ad8 2038 JMPENV_POP;
cc3604b1 2039 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2040 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2041 my_exit_jump();
4633a7c4 2042 /* NOTREACHED */
6224f72b 2043 case 3:
3280af22 2044 if (PL_restartop) {
533c011a 2045 PL_op = PL_restartop;
3280af22 2046 PL_restartop = 0;
312caa8e 2047 goto redo_body;
4633a7c4 2048 }
3280af22 2049 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2050 if (flags & G_ARRAY)
2051 retval = 0;
2052 else {
2053 retval = 1;
3280af22 2054 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2055 }
312caa8e 2056 break;
4633a7c4
LW		 2057 }
2058
14dd3ad8 2059 JMPENV_POP;
4633a7c4 2060 if (flags & G_DISCARD) {
3280af22 2061 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2062 retval = 0;
2063 FREETMPS;
2064 LEAVE;
2065 }
533c011a 2066 PL_op = oldop;
4633a7c4
LW		 2067 return retval;
2068}
2069
954c1994
GS		 2070/*
2071=for apidoc p||eval_pv
2072
2073Tells Perl to C<eval> the given string and return an SV* result.
2074
2075=cut
2076*/
2077
137443ea 2078SV*
864dbfa3 2079Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 2080{
2081 dSP;
2082 SV* sv = newSVpv(p, 0);
2083
864dbfa3 2084 eval_sv(sv, G_SCALAR);
137443ea 2085 SvREFCNT_dec(sv);
2086
2087 SPAGAIN;
2088 sv = POPs;
2089 PUTBACK;
2090
2d8e6c8d
GS		 2091 if (croak_on_error && SvTRUE(ERRSV)) {
2092 STRLEN n_a;
cea2e8a9 2093 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2094 }
137443ea 2095
2096 return sv;
2097}
2098
4633a7c4
LW		 2099/* Require a module. */
2100
954c1994 2101/*
ccfc67b7
JH		 2102=head1 Embedding Functions
2103
954c1994
GS		 2104=for apidoc p||require_pv
2105
7d3fb230
BS		 2106Tells Perl to C<require> the file named by the string argument. It is
2107analogous to the Perl code C<eval "require '$file'">. It's even
2108implemented that way; consider using Perl_load_module instead.
954c1994 2109
7d3fb230 2110=cut */
954c1994 2111
4633a7c4 2112void
864dbfa3 2113Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2114{
d3acc0f7
JP		 2115 SV* sv;
2116 dSP;
e788e7d3 2117 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP		 2118 PUTBACK;
2119 sv = sv_newmortal();
4633a7c4
LW		 2120 sv_setpv(sv, "require '");
2121 sv_catpv(sv, pv);
2122 sv_catpv(sv, "'");
864dbfa3 2123 eval_sv(sv, G_DISCARD);
d3acc0f7
JP		 2124 SPAGAIN;
2125 POPSTACK;
79072805
LW		 2126}
2127
79072805 2128void
864dbfa3 2129Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW		 2130{
2131 register GV *gv;
2132
155aba94 2133 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2134 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW		 2135}
2136
76e3520e 2137STATIC void
cea2e8a9 2138S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2139{
ab821d7f 2140 /* This message really ought to be max 23 lines.
75c72d73 2141 * Removed -h because the user already knows that option. Others? */
fb73857a 2142
76e3520e 2143 static char *usage_msg[] = {
fb73857a 2144"-0[octal] specify record separator (\\0, if no argument)",
2145"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2146"-C enable native wide character system interfaces",
1950ee41 2147"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS		 2148"-d[:debugger] run program under debugger",
2149"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2150"-e 'command' one line of program (several -e's allowed, omit programfile)",
2151"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2152"-i[extension] edit <> files in place (makes backup if extension supplied)",
2153"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2154"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS		 2155"-[mM][-]module execute `use/no module...' before executing program",
2156"-n assume 'while (<>) { ... }' loop around program",
2157"-p assume loop like -n but print line also, like sed",
2158"-P run program through C preprocessor before compilation",
2159"-s enable rudimentary parsing for switches after programfile",
2160"-S look for programfile using PATH environment variable",
2161"-T enable tainting checks",
2162"-u dump core after parsing program",
fb73857a 2163"-U allow unsafe operations",
aac3bd0d
GS		 2164"-v print version, subversion (includes VERY IMPORTANT perl info)",
2165"-V[:variable] print configuration summary (or a single Config.pm variable)",
2166"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS		 2167"-W enable all warnings",
2168"-X disable all warnings",
fb73857a 2169"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2170"\n",
2171NULL
2172};
76e3520e 2173 char **p = usage_msg;
fb73857a 2174
b0e47665
GS		 2175 PerlIO_printf(PerlIO_stdout(),
2176 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2177 name);
fb73857a 2178 while (*p)
b0e47665 2179 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW		 2180}
2181
79072805
LW		 2182/* This routine handles any switches that can be given during run */
2183
2184char *
864dbfa3 2185Perl_moreswitches(pTHX_ char *s)
79072805 2186{
ba210ebe 2187 STRLEN numlen;
c07a80fd 2188 U32 rschar;
79072805
LW		 2189
2190 switch (*s) {
2191 case '0':
a863c7d1 2192 {
53305cf1
NC		 2193 I32 flags = 0;
2194 numlen = 4;
2195 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
8bfdd7d9 2196 SvREFCNT_dec(PL_rs);
c07a80fd 2197 if (rschar & ~((U8)~0))
8bfdd7d9 2198 PL_rs = &PL_sv_undef;
c07a80fd 2199 else if (!rschar && numlen >= 2)
8bfdd7d9 2200 PL_rs = newSVpvn("", 0);
c07a80fd 2201 else {
2202 char ch = rschar;
8bfdd7d9 2203 PL_rs = newSVpvn(&ch, 1);
79072805
LW		 2204 }
2205 return s + numlen;
a863c7d1 2206 }
46487f74
GS		 2207 case 'C':
2208 PL_widesyscalls = TRUE;
2209 s++;
2210 return s;
2304df62 2211 case 'F':
3280af22 2212 PL_minus_F = TRUE;
ebce5377
RGS		 2213 PL_splitstr = ++s;
2214 while (*s && !isSPACE(*s)) ++s;
2215 *s = '\0';
2216 PL_splitstr = savepv(PL_splitstr);
2304df62 2217 return s;
79072805 2218 case 'a':
3280af22 2219 PL_minus_a = TRUE;
79072805
LW		 2220 s++;
2221 return s;
2222 case 'c':
3280af22 2223 PL_minus_c = TRUE;
79072805
LW		 2224 s++;
2225 return s;
2226 case 'd':
bbce6d69 2227 forbid_setid("-d");
4633a7c4 2228 s++;
70c94a19
RR		 2229 /* The following permits -d:Mod to accepts arguments following an =
2230 in the fashion that -MSome::Mod does. */
2231 if (*s == ':' || *s == '=') {
2232 char *start;
2233 SV *sv;
2234 sv = newSVpv("use Devel::", 0);
2235 start = ++s;
2236 /* We now allow -d:Module=Foo,Bar */
2237 while(isALNUM(*s) || *s==':') ++s;
2238 if (*s != '=')
2239 sv_catpv(sv, start);
2240 else {
2241 sv_catpvn(sv, start, s-start);
2242 sv_catpv(sv, " split(/,/,q{");
2243 sv_catpv(sv, ++s);
2244 sv_catpv(sv, "})");
2245 }
4633a7c4 2246 s += strlen(s);
70c94a19 2247 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2248 }
ed094faf 2249 if (!PL_perldb) {
3280af22 2250 PL_perldb = PERLDB_ALL;
a0d0e21e 2251 init_debugger();
ed094faf 2252 }
79072805
LW		 2253 return s;
2254 case 'D':
0453d815 2255 {
79072805 2256#ifdef DEBUGGING
bbce6d69 2257 forbid_setid("-D");
79072805 2258 if (isALPHA(s[1])) {
04932ac8 2259 /* if adding extra options, remember to update DEBUG_MASK */
1045810a 2260 static char debopts[] = "psltocPmfrxuLHXDSTRJ";
79072805
LW		 2261 char *d;
2262
93a17b20 2263 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2264 PL_debug |= 1 << (d - debopts);
79072805
LW		 2265 }
2266 else {
3280af22 2267 PL_debug = atoi(s+1);
79072805
LW		 2268 for (s++; isDIGIT(*s); s++) ;
2269 }
aea4f609 2270 PL_debug |= DEBUG_TOP_FLAG;
79072805 2271#else
0453d815
PM		 2272 if (ckWARN_d(WARN_DEBUGGING))
2273 Perl_warner(aTHX_ WARN_DEBUGGING,
2274 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2275 for (s++; isALNUM(*s); s++) ;
79072805
LW		 2276#endif
2277 /*SUPPRESS 530*/
2278 return s;
0453d815 2279 }
4633a7c4 2280 case 'h':
ac27b0f5 2281 usage(PL_origargv[0]);
6ad3d225 2282 PerlProc_exit(0);
79072805 2283 case 'i':
3280af22
NIS		 2284 if (PL_inplace)
2285 Safefree(PL_inplace);
2286 PL_inplace = savepv(s+1);
79072805 2287 /*SUPPRESS 530*/
3280af22 2288 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2289 if (*s) {
fb73857a 2290 *s++ = '\0';
7b8d334a
GS		 2291 if (*s == '-') /* Additional switches on #! line. */
2292 s++;
2293 }
fb73857a 2294 return s;
4e49a025 2295 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2296 forbid_setid("-I");
fb73857a 2297 ++s;
2298 while (*s && isSPACE(*s))
2299 ++s;
2300 if (*s) {
774d564b 2301 char *e, *p;
0df16ed7
GS		 2302 p = s;
2303 /* ignore trailing spaces (possibly followed by other switches) */
2304 do {
2305 for (e = p; *e && !isSPACE(*e); e++) ;
2306 p = e;
2307 while (isSPACE(*p))
2308 p++;
2309 } while (*p && *p != '-');
2310 e = savepvn(s, e-s);
9c8a64f0 2311 incpush(e, TRUE, TRUE);
0df16ed7
GS		 2312 Safefree(e);
2313 s = p;
2314 if (*s == '-')
2315 s++;
79072805
LW		 2316 }
2317 else
a67e862a 2318 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2319 return s;
79072805 2320 case 'l':
3280af22 2321 PL_minus_l = TRUE;
79072805 2322 s++;
7889fe52
NIS		 2323 if (PL_ors_sv) {
2324 SvREFCNT_dec(PL_ors_sv);
2325 PL_ors_sv = Nullsv;
2326 }
79072805 2327 if (isDIGIT(*s)) {
53305cf1 2328 I32 flags = 0;
7889fe52 2329 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC		 2330 numlen = 3 + (*s == '0');
2331 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW		 2332 s += numlen;
2333 }
2334 else {
8bfdd7d9 2335 if (RsPARA(PL_rs)) {
7889fe52
NIS		 2336 PL_ors_sv = newSVpvn("\n\n",2);
2337 }
2338 else {
8bfdd7d9 2339 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2340 }
79072805
LW		 2341 }
2342 return s;
1a30305b 2343 case 'M':
bbce6d69 2344 forbid_setid("-M"); /* XXX ? */
1a30305b 2345 /* FALL THROUGH */
2346 case 'm':
bbce6d69 2347 forbid_setid("-m"); /* XXX ? */
1a30305b 2348 if (*++s) {
a5f75d66 2349 char *start;
11343788 2350 SV *sv;
a5f75d66
AD		 2351 char *use = "use ";
2352 /* -M-foo == 'no foo' */
2353 if (*s == '-') { use = "no "; ++s; }
11343788 2354 sv = newSVpv(use,0);
a5f75d66 2355 start = s;
1a30305b 2356 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd 2357 while(isALNUM(*s) || *s==':') ++s;
2358 if (*s != '=') {
11343788 2359 sv_catpv(sv, start);
c07a80fd 2360 if (*(start-1) == 'm') {
2361 if (*s != '\0')
cea2e8a9 2362 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2363 sv_catpv( sv, " ()");
c07a80fd 2364 }
2365 } else {
6df41af2 2366 if (s == start)
be98fb35
GS		 2367 Perl_croak(aTHX_ "Module name required with -%c option",
2368 s[-1]);
11343788
MB		 2369 sv_catpvn(sv, start, s-start);
2370 sv_catpv(sv, " split(/,/,q{");
2371 sv_catpv(sv, ++s);
2372 sv_catpv(sv, "})");
c07a80fd 2373 }
1a30305b 2374 s += strlen(s);
5c831c24 2375 if (!PL_preambleav)
3280af22
NIS		 2376 PL_preambleav = newAV();
2377 av_push(PL_preambleav, sv);
1a30305b 2378 }
2379 else
cea2e8a9 2380 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2381 return s;
79072805 2382 case 'n':
3280af22 2383 PL_minus_n = TRUE;
79072805
LW		 2384 s++;
2385 return s;
2386 case 'p':
3280af22 2387 PL_minus_p = TRUE;
79072805
LW		 2388 s++;
2389 return s;
2390 case 's':
bbce6d69 2391 forbid_setid("-s");
3280af22 2392 PL_doswitches = TRUE;
79072805
LW		 2393 s++;
2394 return s;
6537fe72
MS		 2395 case 't':
2396 if (!PL_tainting)
2397 Perl_croak(aTHX_ "Too late for \"-t\" option");
2398 s++;
2399 return s;
463ee0b2 2400 case 'T':
3280af22 2401 if (!PL_tainting)
cea2e8a9 2402 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW		 2403 s++;
2404 return s;
79072805 2405 case 'u':
bf4acbe4
GS		 2406#ifdef MACOS_TRADITIONAL
2407 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2408#endif
3280af22 2409 PL_do_undump = TRUE;
79072805
LW		 2410 s++;
2411 return s;
2412 case 'U':
3280af22 2413 PL_unsafe = TRUE;
79072805
LW		 2414 s++;
2415 return s;
2416 case 'v':
8e9464f1 2417#if !defined(DGUX)
b0e47665 2418 PerlIO_printf(PerlIO_stdout(),
d2560b70 2419 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2420 PL_patchlevel, ARCHNAME));
8e9464f1
JH		 2421#else /* DGUX */
2422/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2423 PerlIO_printf(PerlIO_stdout(),
2424 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2425 PerlIO_printf(PerlIO_stdout(),
2426 Perl_form(aTHX_ " built under %s at %s %s\n",
2427 OSNAME, __DATE__, __TIME__));
2428 PerlIO_printf(PerlIO_stdout(),
2429 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2430 OSVERS));
8e9464f1
JH		 2431#endif /* !DGUX */
2432
fb73857a 2433#if defined(LOCAL_PATCH_COUNT)
2434 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS		 2435 PerlIO_printf(PerlIO_stdout(),
2436 "\n(with %d registered patch%s, "
2437 "see perl -V for more detail)",
2438 (int)LOCAL_PATCH_COUNT,
2439 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2440#endif
1a30305b 2441
b0e47665 2442 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2443 "\n\nCopyright 1987-2002, Larry Wall\n");
eae9c151
JH		 2444#ifdef MACOS_TRADITIONAL
2445 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2446 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 2447 "maintained by Chris Nandor\n");
eae9c151 2448#endif
79072805 2449#ifdef MSDOS
b0e47665
GS		 2450 PerlIO_printf(PerlIO_stdout(),
2451 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff 2452#endif
2453#ifdef DJGPP
b0e47665
GS		 2454 PerlIO_printf(PerlIO_stdout(),
2455 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2456 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2457#endif
79072805 2458#ifdef OS2
b0e47665
GS		 2459 PerlIO_printf(PerlIO_stdout(),
2460 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 2461 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2462#endif
79072805 2463#ifdef atarist
b0e47665
GS		 2464 PerlIO_printf(PerlIO_stdout(),
2465 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2466#endif
a3f9223b 2467#ifdef __BEOS__
b0e47665
GS		 2468 PerlIO_printf(PerlIO_stdout(),
2469 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2470#endif
1d84e8df 2471#ifdef MPE
b0e47665 2472 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2473 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2002\n");
1d84e8df 2474#endif
9d116dd7 2475#ifdef OEMVS
b0e47665
GS		 2476 PerlIO_printf(PerlIO_stdout(),
2477 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2478#endif
495c5fdc 2479#ifdef __VOS__
b0e47665 2480 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2481 "Stratus VOS port by Paul_Green@stratus.com, 1997-2002\n");
495c5fdc 2482#endif
092bebab 2483#ifdef __OPEN_VM
b0e47665
GS		 2484 PerlIO_printf(PerlIO_stdout(),
2485 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2486#endif
a1a0e61e 2487#ifdef POSIX_BC
b0e47665
GS		 2488 PerlIO_printf(PerlIO_stdout(),
2489 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2490#endif
61ae2fbf 2491#ifdef __MINT__
b0e47665
GS		 2492 PerlIO_printf(PerlIO_stdout(),
2493 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2494#endif
f83d2536 2495#ifdef EPOC
b0e47665 2496 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2497 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 2498#endif
e1caacb4 2499#ifdef UNDER_CE
be3c0a43 2500 printf("WINCE port by Rainer Keuchel, 2001-2002\n");
e1caacb4
JH		 2501 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2502 wce_hitreturn();
2503#endif
baed7233
DL		 2504#ifdef BINARY_BUILD_NOTICE
2505 BINARY_BUILD_NOTICE;
2506#endif
b0e47665
GS		 2507 PerlIO_printf(PerlIO_stdout(),
2508 "\n\
79072805 2509Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2510GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS		 2511Complete documentation for Perl, including FAQ lists, should be found on\n\
2512this system using `man perl' or `perldoc perl'. If you have access to the\n\
2513Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2514 PerlProc_exit(0);
79072805 2515 case 'w':
599cee73 2516 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2517 PL_dowarn |= G_WARN_ON;
599cee73
PM		 2518 s++;
2519 return s;
2520 case 'W':
ac27b0f5 2521 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS		 2522 if (!specialWARN(PL_compiling.cop_warnings))
2523 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2524 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM		 2525 s++;
2526 return s;
2527 case 'X':
ac27b0f5 2528 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS		 2529 if (!specialWARN(PL_compiling.cop_warnings))
2530 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2531 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW		 2532 s++;
2533 return s;
a0d0e21e 2534 case '*':
79072805
LW		 2535 case ' ':
2536 if (s[1] == '-') /* Additional switches on #! line. */
2537 return s+2;
2538 break;
a0d0e21e 2539 case '-':
79072805 2540 case 0:
51882d45 2541#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS		 2542 case '\r':
2543#endif
79072805
LW		 2544 case '\n':
2545 case '\t':
2546 break;
aa689395 2547#ifdef ALTERNATE_SHEBANG
2548 case 'S': /* OS/2 needs -S on "extproc" line. */
2549 break;
2550#endif
a0d0e21e 2551 case 'P':
3280af22 2552 if (PL_preprocess)
a0d0e21e
LW		 2553 return s+1;
2554 /* FALL THROUGH */
79072805 2555 default:
cea2e8a9 2556 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW		 2557 }
2558 return Nullch;
2559}
2560
2561/* compliments of Tom Christiansen */
2562
2563/* unexec() can be found in the Gnu emacs distribution */
ee580363 2564/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW		 2565
2566void
864dbfa3 2567Perl_my_unexec(pTHX)
79072805
LW		 2568{
2569#ifdef UNEXEC
46fc3d4c 2570 SV* prog;
2571 SV* file;
ee580363 2572 int status = 1;
79072805
LW		 2573 extern int etext;
2574
ee580363 2575 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2576 sv_catpv(prog, "/perl");
6b88bc9c 2577 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2578 sv_catpv(file, ".perldump");
79072805 2579
ee580363
GS		 2580 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2581 /* unexec prints msg to stderr in case of failure */
6ad3d225 2582 PerlProc_exit(status);
79072805 2583#else
a5f75d66
AD		 2584# ifdef VMS
2585# include <lib$routines.h>
2586 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2587# else
79072805 2588 ABORT(); /* for use with undump */
aa689395 2589# endif
a5f75d66 2590#endif
79072805
LW		 2591}
2592
cb68f92d
GS		 2593/* initialize curinterp */
2594STATIC void
cea2e8a9 2595S_init_interp(pTHX)
cb68f92d
GS		 2596{
2597
acfe0abc
GS		 2598#ifdef MULTIPLICITY
2599# define PERLVAR(var,type)
2600# define PERLVARA(var,n,type)
2601# if defined(PERL_IMPLICIT_CONTEXT)
2602# if defined(USE_5005THREADS)
2603# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2604# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS		 2605# else /* !USE_5005THREADS */
2606# define PERLVARI(var,type,init) aTHX->var = init;
2607# define PERLVARIC(var,type,init) aTHX->var = init;
2608# endif /* USE_5005THREADS */
3967c732 2609# else
acfe0abc
GS		 2610# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2611# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2612# endif
acfe0abc
GS		 2613# include "intrpvar.h"
2614# ifndef USE_5005THREADS
2615# include "thrdvar.h"
2616# endif
2617# undef PERLVAR
2618# undef PERLVARA
2619# undef PERLVARI
2620# undef PERLVARIC
2621#else
2622# define PERLVAR(var,type)
2623# define PERLVARA(var,n,type)
2624# define PERLVARI(var,type,init) PL_##var = init;
2625# define PERLVARIC(var,type,init) PL_##var = init;
2626# include "intrpvar.h"
2627# ifndef USE_5005THREADS
2628# include "thrdvar.h"
2629# endif
2630# undef PERLVAR
2631# undef PERLVARA
2632# undef PERLVARI
2633# undef PERLVARIC
cb68f92d
GS		 2634#endif
2635
cb68f92d
GS		 2636}
2637
76e3520e 2638STATIC void
cea2e8a9 2639S_init_main_stash(pTHX)
79072805 2640{
463ee0b2 2641 GV *gv;
6e72f9df 2642
3d47000e 2643
ac27b0f5 2644
3280af22 2645 PL_curstash = PL_defstash = newHV();
79cb57f6 2646 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW		 2647 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2648 SvREFCNT_dec(GvHV(gv));
3280af22 2649 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2650 SvREADONLY_on(gv);
3280af22
NIS		 2651 HvNAME(PL_defstash) = savepv("main");
2652 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2653 GvMULTI_on(PL_incgv);
2654 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2655 GvMULTI_on(PL_hintgv);
2656 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2657 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2658 GvMULTI_on(PL_errgv);
2659 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2660 GvMULTI_on(PL_replgv);
cea2e8a9 2661 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB		 2662 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2663 sv_setpvn(ERRSV, "", 0);
3280af22 2664 PL_curstash = PL_defstash;
11faa288 2665 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2666 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2667 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2668 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2669 /* We must init $/ before switches are processed. */
864dbfa3 2670 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW		 2671}
2672
76e3520e 2673STATIC void
cea2e8a9 2674S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2675{
1b24ed4b
MS		 2676 char *quote;
2677 char *code;
2678 char *cpp_discard_flag;
2679 char *perl;
2680
6c4ab083 2681 *fdscript = -1;
79072805 2682
3280af22
NIS		 2683 if (PL_e_script) {
2684 PL_origfilename = savepv("-e");
96436eeb 2685 }
6c4ab083
GS		 2686 else {
2687 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2688 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS		 2689
2690 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2691 char *s = scriptname + 8;
2692 *fdscript = atoi(s);
2693 while (isDIGIT(*s))
2694 s++;
2695 if (*s) {
2696 scriptname = savepv(s + 1);
3280af22
NIS		 2697 Safefree(PL_origfilename);
2698 PL_origfilename = scriptname;
6c4ab083
GS		 2699 }
2700 }
2701 }
2702
05ec9bb3 2703 CopFILE_free(PL_curcop);
57843af0 2704 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2705 if (strEQ(PL_origfilename,"-"))
79072805 2706 scriptname = "";
01f988be 2707 if (*fdscript >= 0) {
3280af22 2708 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS		 2709# if defined(HAS_FCNTL) && defined(F_SETFD)
2710 if (PL_rsfp)
2711 /* ensure close-on-exec */
2712 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2713# endif
96436eeb 2714 }
3280af22 2715 else if (PL_preprocess) {
46fc3d4c 2716 char *cpp_cfg = CPPSTDIN;
79cb57f6 2717 SV *cpp = newSVpvn("",0);
46fc3d4c 2718 SV *cmd = NEWSV(0,0);
2719
2720 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2721 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2722 sv_catpv(cpp, cpp_cfg);
79072805 2723
1b24ed4b
MS		 2724# ifndef VMS
2725 sv_catpvn(sv, "-I", 2);
2726 sv_catpv(sv,PRIVLIB_EXP);
2727# endif
46fc3d4c 2728
14953ddc
MB		 2729 DEBUG_P(PerlIO_printf(Perl_debug_log,
2730 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2731 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS		 2732
2733# if defined(MSDOS) || defined(WIN32) || defined(VMS)
2734 quote = "\"";
2735# else
2736 quote = "'";
2737# endif
2738
2739# ifdef VMS
2740 cpp_discard_flag = "";
2741# else
2742 cpp_discard_flag = "-C";
2743# endif
2744
2745# ifdef OS2
2746 perl = os2_execname(aTHX);
2747# else
2748 perl = PL_origargv[0];
2749# endif
2750
2751
2752 /* This strips off Perl comments which might interfere with
2753 the C pre-processor, including #!. #line directives are
2754 deliberately stripped to avoid confusion with Perl's version
2755 of #line. FWP played some golf with it so it will fit
2756 into VMS's 255 character buffer.
2757 */
2758 if( PL_doextract )
2759 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2760 else
2761 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2762
2763 Perl_sv_setpvf(aTHX_ cmd, "\
2764%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
2765 perl, quote, code, quote, scriptname, cpp,
2766 cpp_discard_flag, sv, CPPMINUS);
2767
3280af22 2768 PL_doextract = FALSE;
1b24ed4b
MS		 2769# ifdef IAMSUID /* actually, this is caught earlier */
2770 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2771# ifdef HAS_SETEUID
2772 (void)seteuid(PL_uid); /* musn't stay setuid root */
2773# else
2774# ifdef HAS_SETREUID
2775 (void)setreuid((Uid_t)-1, PL_uid);
2776# else
2777# ifdef HAS_SETRESUID
2778 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2779# else
2780 PerlProc_setuid(PL_uid);
2781# endif
2782# endif
2783# endif
b28d0864 2784 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2785 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805 2786 }
1b24ed4b 2787# endif /* IAMSUID */
0a6c758d 2788
1b24ed4b
MS		 2789 DEBUG_P(PerlIO_printf(Perl_debug_log,
2790 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS		 2791 SvPVX(cmd)));
2792
3280af22 2793 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c 2794 SvREFCNT_dec(cmd);
2795 SvREFCNT_dec(cpp);
79072805
LW		 2796 }
2797 else if (!*scriptname) {
bbce6d69 2798 forbid_setid("program input from stdin");
3280af22 2799 PL_rsfp = PerlIO_stdin();
79072805 2800 }
96436eeb 2801 else {
3280af22 2802 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS		 2803# if defined(HAS_FCNTL) && defined(F_SETFD)
2804 if (PL_rsfp)
2805 /* ensure close-on-exec */
2806 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2807# endif
96436eeb 2808 }
3280af22 2809 if (!PL_rsfp) {
1b24ed4b
MS		 2810# ifdef DOSUID
2811# ifndef IAMSUID /* in case script is not readable before setuid */
2812 if (PL_euid &&
2813 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
2814 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2815 {
2816 /* try again */
2817 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT,
2818 BIN_EXP, (int)PERL_REVISION,
2819 (int)PERL_VERSION,
2820 (int)PERL_SUBVERSION), PL_origargv);
2821 Perl_croak(aTHX_ "Can't do setuid\n");
2822 }
2823# endif
2824# endif
2825# ifdef IAMSUID
2826 errno = EPERM;
2827 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2828 Strerror(errno));
2829# else
2830 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
2831 CopFILE(PL_curcop), Strerror(errno));
2832# endif
13281fa4 2833 }
79072805 2834}
8d063cd8 2835
7b89560d
JH		 2836/* Mention
2837 * I_SYSSTATVFS HAS_FSTATVFS
2838 * I_SYSMOUNT
c890dc6c 2839 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH		 2840 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2841 * here so that metaconfig picks them up. */
2842
104d25b7 2843#ifdef IAMSUID
864dbfa3 2844STATIC int
e688b231 2845S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2846{
0545a864
JH		 2847 int check_okay = 0; /* able to do all the required sys/libcalls */
2848 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2849/*
ad27e871 2850 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2851 * fstatvfs() is UNIX98.
0545a864 2852 * fstatfs() is 4.3 BSD.
ad27e871 2853 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH		 2854 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2855 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH		 2856 */
2857
6439433f
JH		 2858#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2859
2860# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2861 defined(HAS_FSTATVFS)
2862# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2863 struct statvfs stfs;
6439433f 2864
104d25b7
JH		 2865 check_okay = fstatvfs(fd, &stfs) == 0;
2866 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2867# endif /* fstatvfs */
ac27b0f5 2868
6439433f
JH		 2869# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2870 defined(PERL_MOUNT_NOSUID) && \
2871 defined(HAS_FSTATFS) && \
2872 defined(HAS_STRUCT_STATFS) && \
2873 defined(HAS_STRUCT_STATFS_F_FLAGS)
2874# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2875 struct statfs stfs;
6439433f 2876
104d25b7 2877 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2878 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH		 2879# endif /* fstatfs */
2880
2881# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2882 defined(PERL_MOUNT_NOSUID) && \
2883 defined(HAS_FSTAT) && \
2884 defined(HAS_USTAT) && \
2885 defined(HAS_GETMNT) && \
2886 defined(HAS_STRUCT_FS_DATA) && \
2887 defined(NOSTAT_ONE)
2888# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2889 struct stat fdst;
6439433f 2890
0545a864 2891 if (fstat(fd, &fdst) == 0) {
6439433f
JH		 2892 struct ustat us;
2893 if (ustat(fdst.st_dev, &us) == 0) {
2894 struct fs_data fsd;
2895 /* NOSTAT_ONE here because we're not examining fields which
2896 * vary between that case and STAT_ONE. */
ad27e871 2897 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH		 2898 size_t cmplen = sizeof(us.f_fname);
2899 if (sizeof(fsd.fd_req.path) < cmplen)
2900 cmplen = sizeof(fsd.fd_req.path);
2901 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2902 fdst.st_dev == fsd.fd_req.dev) {
2903 check_okay = 1;
2904 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2905 }
2906 }
2907 }
2908 }
0545a864 2909 }
6439433f
JH		 2910# endif /* fstat+ustat+getmnt */
2911
2912# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2913 defined(HAS_GETMNTENT) && \
2914 defined(HAS_HASMNTOPT) && \
2915 defined(MNTOPT_NOSUID)
2916# define FD_ON_NOSUID_CHECK_OKAY
2917 FILE *mtab = fopen("/etc/mtab", "r");
2918 struct mntent *entry;
2919 struct stat stb, fsb;
104d25b7
JH		 2920
2921 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH		 2922 while (entry = getmntent(mtab)) {
2923 if (stat(entry->mnt_dir, &fsb) == 0
2924 && fsb.st_dev == stb.st_dev)
2925 {
2926 /* found the filesystem */
2927 check_okay = 1;
2928 if (hasmntopt(entry, MNTOPT_NOSUID))
2929 on_nosuid = 1;
2930 break;
2931 } /* A single fs may well fail its stat(). */
2932 }
104d25b7
JH		 2933 }
2934 if (mtab)
6439433f
JH		 2935 fclose(mtab);
2936# endif /* getmntent+hasmntopt */
0545a864 2937
ac27b0f5 2938 if (!check_okay)
0545a864 2939 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH		 2940 return on_nosuid;
2941}
2942#endif /* IAMSUID */
2943
76e3520e 2944STATIC void
cea2e8a9 2945S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2946{
155aba94 2947#ifdef IAMSUID
96436eeb 2948 int which;
155aba94 2949#endif
96436eeb 2950
13281fa4
LW		 2951 /* do we need to emulate setuid on scripts? */
2952
2953 /* This code is for those BSD systems that have setuid #! scripts disabled
2954 * in the kernel because of a security problem. Merely defining DOSUID
2955 * in perl will not fix that problem, but if you have disabled setuid
2956 * scripts in the kernel, this will attempt to emulate setuid and setgid
2957 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW		 2958 * root version must be called suidperl or sperlN.NNN. If regular perl
2959 * discovers that it has opened a setuid script, it calls suidperl with
2960 * the same argv that it had. If suidperl finds that the script it has
2961 * just opened is NOT setuid root, it sets the effective uid back to the
2962 * uid. We don't just make perl setuid root because that loses the
2963 * effective uid we had before invoking perl, if it was different from the
2964 * uid.
13281fa4
LW		 2965 *
2966 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2967 * be defined in suidperl only. suidperl must be setuid root. The
2968 * Configure script will set this up for you if you want it.
2969 */
a687059c 2970
13281fa4 2971#ifdef DOSUID
6e72f9df 2972 char *s, *s2;
a0d0e21e 2973
b28d0864 2974 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2975 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2976 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2977 I32 len;
2d8e6c8d 2978 STRLEN n_a;
13281fa4 2979
a687059c 2980#ifdef IAMSUID
fe14fcc3 2981#ifndef HAS_SETREUID
a687059c
LW		 2982 /* On this access check to make sure the directories are readable,
2983 * there is actually a small window that the user could use to make
2984 * filename point to an accessible directory. So there is a faint
2985 * chance that someone could execute a setuid script down in a
2986 * non-accessible directory. I don't know what to do about that.
2987 * But I don't think it's too important. The manual lies when
2988 * it says access() is useful in setuid programs.
2989 */
cc49e20b 2990 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2991 Perl_croak(aTHX_ "Permission denied");
a687059c
LW		 2992#else
2993 /* If we can swap euid and uid, then we can determine access rights
2994 * with a simple stat of the file, and then compare device and
2995 * inode to make sure we did stat() on the same file we opened.
2996 * Then we just have to make sure he or she can execute it.
2997 */
2998 {
2999 struct stat tmpstatbuf;
3000
85e6fe83
LW		 3001 if (
3002#ifdef HAS_SETREUID
b28d0864 3003 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW		 3004#else
3005# if HAS_SETRESUID
b28d0864 3006 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 3007# endif
85e6fe83 3008#endif
b28d0864 3009 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 3010 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 3011 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 3012 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 3013#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 3014 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 3015 Perl_croak(aTHX_ "Permission denied");
104d25b7 3016#endif
b28d0864
NIS		 3017 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3018 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3019 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3020 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3021 }
85e6fe83
LW		 3022 if (
3023#ifdef HAS_SETREUID
b28d0864 3024 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW		 3025#else
3026# if defined(HAS_SETRESUID)
b28d0864 3027 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3028# endif
85e6fe83 3029#endif
b28d0864 3030 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3031 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3032 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3033 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3034 }
fe14fcc3 3035#endif /* HAS_SETREUID */
a687059c
LW		 3036#endif /* IAMSUID */
3037
b28d0864 3038 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3039 Perl_croak(aTHX_ "Permission denied");
b28d0864 3040 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3041 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3042 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3043 CopLINE_inc(PL_curcop);
6b88bc9c 3044 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3045 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3046 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3047 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3048 if (*s == ' ') s++;
45d8adaa 3049 while (!isSPACE(*s)) s++;
2d8e6c8d 3050 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df 3051 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3052 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3053 Perl_croak(aTHX_ "Not a perl script");
a687059c 3054 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW		 3055 /*
3056 * #! arg must be what we saw above. They can invoke it by
3057 * mentioning suidperl explicitly, but they may not add any strange
3058 * arguments beyond what #! says if they do invoke suidperl that way.
3059 */
3060 len = strlen(validarg);
3061 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3062 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3063 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW		 3064
3065#ifndef IAMSUID
b28d0864
NIS		 3066 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3067 PL_euid == PL_statbuf.st_uid)
3068 if (!PL_do_undump)
cea2e8a9 3069 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3070FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3071#endif /* IAMSUID */
13281fa4 3072
b28d0864
NIS		 3073 if (PL_euid) { /* oops, we're not the setuid root perl */
3074 (void)PerlIO_close(PL_rsfp);
13281fa4 3075#ifndef IAMSUID
46fc3d4c 3076 /* try again */
a7cb1f99 3077 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3078 (int)PERL_REVISION, (int)PERL_VERSION,
3079 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3080#endif
cea2e8a9 3081 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 3082 }
3083
b28d0864 3084 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3085#ifdef HAS_SETEGID
b28d0864 3086 (void)setegid(PL_statbuf.st_gid);
a687059c 3087#else
fe14fcc3 3088#ifdef HAS_SETREGID
b28d0864 3089 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW		 3090#else
3091#ifdef HAS_SETRESGID
b28d0864 3092 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3093#else
b28d0864 3094 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW		 3095#endif
3096#endif
85e6fe83 3097#endif
b28d0864 3098 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3099 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3100 }
b28d0864
NIS		 3101 if (PL_statbuf.st_mode & S_ISUID) {
3102 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3103#ifdef HAS_SETEUID
b28d0864 3104 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3105#else
fe14fcc3 3106#ifdef HAS_SETREUID
b28d0864 3107 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW		 3108#else
3109#ifdef HAS_SETRESUID
b28d0864 3110 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3111#else
b28d0864 3112 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW		 3113#endif
3114#endif
85e6fe83 3115#endif
b28d0864 3116 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3117 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3118 }
b28d0864 3119 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3120#ifdef HAS_SETEUID
b28d0864 3121 (void)seteuid((Uid_t)PL_uid);
a687059c 3122#else
fe14fcc3 3123#ifdef HAS_SETREUID
b28d0864 3124 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3125#else
85e6fe83 3126#ifdef HAS_SETRESUID
b28d0864 3127 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3128#else
b28d0864 3129 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3130#endif
a687059c
LW		 3131#endif
3132#endif
b28d0864 3133 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3134 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3135 }
748a9306 3136 init_ids();
b28d0864 3137 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3138 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW		 3139 }
3140#ifdef IAMSUID
6b88bc9c 3141 else if (PL_preprocess)
cea2e8a9 3142 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3143 else if (fdscript >= 0)
cea2e8a9 3144 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3145 else
cea2e8a9 3146 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb 3147
3148 /* We absolutely must clear out any saved ids here, so we */
3149 /* exec the real perl, substituting fd script for scriptname. */
3150 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS		 3151 PerlIO_rewind(PL_rsfp);
3152 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS		 3153 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3154 if (!PL_origargv[which])
cea2e8a9
GS		 3155 Perl_croak(aTHX_ "Permission denied");
3156 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3157 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3158#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3159 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3160#endif
a7cb1f99 3161 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3162 (int)PERL_REVISION, (int)PERL_VERSION,
3163 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3164 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3165#endif /* IAMSUID */
a687059c 3166#else /* !DOSUID */
3280af22 3167 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3168#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS		 3169 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3170 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3171 ||
b28d0864 3172 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3173 )
b28d0864 3174 if (!PL_do_undump)
cea2e8a9 3175 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3176FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3177#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3178 /* not set-id, must be wrapped */
a687059c 3179 }
13281fa4 3180#endif /* DOSUID */
79072805 3181}
13281fa4 3182
76e3520e 3183STATIC void
cea2e8a9 3184S_find_beginning(pTHX)
79072805 3185{
6e72f9df 3186 register char *s, *s2;
33b78306
LW		 3187
3188 /* skip forward in input to the real script? */
3189
bbce6d69 3190 forbid_setid("-x");
bf4acbe4 3191#ifdef MACOS_TRADITIONAL
084592ab 3192 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3193
bf4acbe4
GS		 3194 while (PL_doextract || gMacPerl_AlwaysExtract) {
3195 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3196 if (!gMacPerl_AlwaysExtract)
3197 Perl_croak(aTHX_ "No Perl script found in input\n");
3198
3199 if (PL_doextract) /* require explicit override ? */
3200 if (!OverrideExtract(PL_origfilename))
3201 Perl_croak(aTHX_ "User aborted script\n");
3202 else
3203 PL_doextract = FALSE;
3204
3205 /* Pater peccavi, file does not have #! */
3206 PerlIO_rewind(PL_rsfp);
ac27b0f5 3207
bf4acbe4
GS		 3208 break;
3209 }
3210#else
3280af22
NIS		 3211 while (PL_doextract) {
3212 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3213 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3214#endif
4f0c37ba
IZ		 3215 s2 = s;
3216 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS		 3217 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3218 PL_doextract = FALSE;
6e72f9df 3219 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3220 s2 = s;
3221 while (*s == ' ' || *s == '\t') s++;
3222 if (*s++ == '-') {
3223 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3224 if (strnEQ(s2-4,"perl",4))
3225 /*SUPPRESS 530*/
155aba94
GS		 3226 while ((s = moreswitches(s)))
3227 ;
33b78306 3228 }
95e8664e
CN		 3229#ifdef MACOS_TRADITIONAL
3230 break;
3231#endif
83025b21
LW		 3232 }
3233 }
3234}
3235
afe37c7d 3236
76e3520e 3237STATIC void
cea2e8a9 3238S_init_ids(pTHX)
352d5a3a 3239{
d8eceb89
JH		 3240 PL_uid = PerlProc_getuid();
3241 PL_euid = PerlProc_geteuid();
3242 PL_gid = PerlProc_getgid();
3243 PL_egid = PerlProc_getegid();
748a9306 3244#ifdef VMS
b28d0864
NIS		 3245 PL_uid |= PL_gid << 16;
3246 PL_euid |= PL_egid << 16;
748a9306 3247#endif
3280af22 3248 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3249}
79072805 3250
76e3520e 3251STATIC void
cea2e8a9 3252S_forbid_setid(pTHX_ char *s)
bbce6d69 3253{
3280af22 3254 if (PL_euid != PL_uid)
cea2e8a9 3255 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3256 if (PL_egid != PL_gid)
cea2e8a9 3257 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69 3258}
3259
1ee4443e
IZ		 3260void
3261Perl_init_debugger(pTHX)
748a9306 3262{
1ee4443e
IZ		 3263 HV *ostash = PL_curstash;
3264
3280af22
NIS		 3265 PL_curstash = PL_debstash;
3266 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3267 AvREAL_off(PL_dbargs);
3268 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3269 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3270 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3271 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3272 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3273 sv_setiv(PL_DBsingle, 0);
3280af22 3274 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3275 sv_setiv(PL_DBtrace, 0);
3280af22 3276 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3277 sv_setiv(PL_DBsignal, 0);
1ee4443e 3278 PL_curstash = ostash;
352d5a3a
LW		 3279}
3280
2ce36478
SM		 3281#ifndef STRESS_REALLOC
3282#define REASONABLE(size) (size)
3283#else
3284#define REASONABLE(size) (1) /* unreasonable */
3285#endif
3286
11343788 3287void
cea2e8a9 3288Perl_init_stacks(pTHX)
79072805 3289{
e336de0d 3290 /* start with 128-item stack and 8K cxstack */
3280af22 3291 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3292 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS		 3293 PL_curstackinfo->si_type = PERLSI_MAIN;
3294 PL_curstack = PL_curstackinfo->si_stack;
3295 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3296
3280af22
NIS		 3297 PL_stack_base = AvARRAY(PL_curstack);
3298 PL_stack_sp = PL_stack_base;
3299 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3300
3280af22
NIS		 3301 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3302 PL_tmps_floor = -1;
3303 PL_tmps_ix = -1;
3304 PL_tmps_max = REASONABLE(128);
8990e307 3305
3280af22
NIS		 3306 New(54,PL_markstack,REASONABLE(32),I32);
3307 PL_markstack_ptr = PL_markstack;
3308 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3309
ce2f7c3b 3310 SET_MARK_OFFSET;
e336de0d 3311
3280af22
NIS		 3312 New(54,PL_scopestack,REASONABLE(32),I32);
3313 PL_scopestack_ix = 0;
3314 PL_scopestack_max = REASONABLE(32);
79072805 3315
3280af22
NIS		 3316 New(54,PL_savestack,REASONABLE(128),ANY);
3317 PL_savestack_ix = 0;
3318 PL_savestack_max = REASONABLE(128);
79072805 3319
3280af22
NIS		 3320 New(54,PL_retstack,REASONABLE(16),OP*);
3321 PL_retstack_ix = 0;
3322 PL_retstack_max = REASONABLE(16);
378cc40b 3323}
33b78306 3324
2ce36478
SM		 3325#undef REASONABLE
3326
76e3520e 3327STATIC void
cea2e8a9 3328S_nuke_stacks(pTHX)
6e72f9df 3329{
3280af22
NIS		 3330 while (PL_curstackinfo->si_next)
3331 PL_curstackinfo = PL_curstackinfo->si_next;
3332 while (PL_curstackinfo) {
3333 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3334 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS		 3335 Safefree(PL_curstackinfo->si_cxstack);
3336 Safefree(PL_curstackinfo);
3337 PL_curstackinfo = p;
e336de0d 3338 }
3280af22
NIS		 3339 Safefree(PL_tmps_stack);
3340 Safefree(PL_markstack);
3341 Safefree(PL_scopestack);
3342 Safefree(PL_savestack);
3343 Safefree(PL_retstack);
378cc40b 3344}
33b78306 3345
76e3520e 3346STATIC void
cea2e8a9 3347S_init_lexer(pTHX)
8990e307 3348{
06039172 3349 PerlIO *tmpfp;
3280af22
NIS		 3350 tmpfp = PL_rsfp;
3351 PL_rsfp = Nullfp;
3352 lex_start(PL_linestr);
3353 PL_rsfp = tmpfp;
79cb57f6 3354 PL_subname = newSVpvn("main",4);
8990e307
LW		 3355}
3356
76e3520e 3357STATIC void
cea2e8a9 3358S_init_predump_symbols(pTHX)
45d8adaa 3359{
93a17b20 3360 GV *tmpgv;
af8c498a 3361 IO *io;
79072805 3362
864dbfa3 3363 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS		 3364 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3365 GvMULTI_on(PL_stdingv);
af8c498a 3366 io = GvIOp(PL_stdingv);
a04651f4 3367 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3368 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3369 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3370 GvMULTI_on(tmpgv);
af8c498a 3371 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3372
85e6fe83 3373 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3374 GvMULTI_on(tmpgv);
af8c498a 3375 io = GvIOp(tmpgv);
a04651f4 3376 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3377 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3378 setdefout(tmpgv);
adbc6bb1 3379 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3380 GvMULTI_on(tmpgv);
af8c498a 3381 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3382
bf49b057
GS		 3383 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3384 GvMULTI_on(PL_stderrgv);
3385 io = GvIOp(PL_stderrgv);
a04651f4 3386 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3387 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3388 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3389 GvMULTI_on(tmpgv);
af8c498a 3390 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3391
3280af22 3392 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3393
bf4acbe4
GS		 3394 if (PL_osname)
3395 Safefree(PL_osname);
3396 PL_osname = savepv(OSNAME);
79072805 3397}
33b78306 3398
a11ec5a9
RGS		 3399void
3400Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
33b78306 3401{
79072805 3402 char *s;
79072805 3403 argc--,argv++; /* skip name of script */
3280af22 3404 if (PL_doswitches) {
79072805
LW		 3405 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3406 if (!argv[0][1])
3407 break;
379d538a 3408 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW		 3409 argc--,argv++;
3410 break;
3411 }
155aba94 3412 if ((s = strchr(argv[0], '='))) {
79072805 3413 *s++ = '\0';
85e6fe83 3414 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW		 3415 }
3416 else
85e6fe83 3417 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3418 }
79072805 3419 }
a11ec5a9
RGS		 3420 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3421 GvMULTI_on(PL_argvgv);
3422 (void)gv_AVadd(PL_argvgv);
3423 av_clear(GvAVn(PL_argvgv));
3424 for (; argc > 0; argc--,argv++) {
3425 SV *sv = newSVpv(argv[0],0);
3426 av_push(GvAVn(PL_argvgv),sv);
3427 if (PL_widesyscalls)
3428 (void)sv_utf8_decode(sv);
3429 }
3430 }
3431}
3432
04fee9b5
NIS		 3433#ifdef HAS_PROCSELFEXE
3434/* This is a function so that we don't hold on to MAXPATHLEN
8338e367 3435 bytes of stack longer than necessary
04fee9b5
NIS		 3436 */
3437STATIC void
3438S_procself_val(pTHX_ SV *sv, char *arg0)
3439{
3440 char buf[MAXPATHLEN];
d13a6521 3441 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
04fee9b5
NIS		 3442 if (len > 0) {
3443 sv_setpvn(sv,buf,len);
3444 }
3445 else {
3446 sv_setpv(sv,arg0);
3447 }
3448}
3449#endif /* HAS_PROCSELFEXE */
3450
a11ec5a9
RGS		 3451STATIC void
3452S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3453{
3454 char *s;
3455 SV *sv;
3456 GV* tmpgv;
a11ec5a9 3457
3280af22
NIS		 3458 PL_toptarget = NEWSV(0,0);
3459 sv_upgrade(PL_toptarget, SVt_PVFM);
3460 sv_setpvn(PL_toptarget, "", 0);
3461 PL_bodytarget = NEWSV(0,0);
3462 sv_upgrade(PL_bodytarget, SVt_PVFM);
3463 sv_setpvn(PL_bodytarget, "", 0);
3464 PL_formtarget = PL_bodytarget;
79072805 3465
bbce6d69 3466 TAINT;
a11ec5a9
RGS		 3467
3468 init_argv_symbols(argc,argv);
3469
155aba94 3470 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS		 3471#ifdef MACOS_TRADITIONAL
3472 /* $0 is not majick on a Mac */
3473 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3474#else
3280af22 3475 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3476 magicname("0", "0", 1);
bf4acbe4 3477#endif
79072805 3478 }
04fee9b5
NIS		 3479 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))) {/* $^X */
3480#ifdef HAS_PROCSELFEXE
3481