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[perl5.git] / perl.c
CommitLineData
a0d0e21e
LW		 1/* perl.c
2 *
bc89e66f 3 * Copyright (c) 1987-2001 Larry Wall
a687059c 4 *
352d5a3a
LW		 5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
a687059c 7 *
8d063cd8
LW		 8 */
9
a0d0e21e
LW		 10/*
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
12 */
45d8adaa 13
378cc40b 14#include "EXTERN.h"
864dbfa3 15#define PERL_IN_PERL_C
378cc40b 16#include "perl.h"
e3321bb0 17#include "patchlevel.h" /* for local_patches */
378cc40b 18
df5cef82 19/* XXX If this causes problems, set i_unistd=undef in the hint file. */
a0d0e21e
LW		 20#ifdef I_UNISTD
21#include <unistd.h>
22#endif
a0d0e21e 23
54310121 24#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
20ce7b12 25char *getenv (char *); /* Usually in <stdlib.h> */
54310121 26#endif
27
0cb96387
GS		 28static I32 read_e_script(pTHXo_ int idx, SV *buf_sv, int maxlen);
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
873ef191 42#ifdef PERL_OBJECT
7766f137
GS		 43#define perl_construct Perl_construct
44#define perl_parse Perl_parse
45#define perl_run Perl_run
46#define perl_destruct Perl_destruct
47#define perl_free Perl_free
48#endif
32e30700 49
06d86050
GS		 50#if defined(USE_THREADS)
51# define INIT_TLS_AND_INTERP \
52 STMT_START { \
53 if (!PL_curinterp) { \
54 PERL_SET_INTERP(my_perl); \
55 INIT_THREADS; \
56 ALLOC_THREAD_KEY; \
57 } \
58 } STMT_END
59#else
60# if defined(USE_ITHREADS)
61# define INIT_TLS_AND_INTERP \
62 STMT_START { \
63 if (!PL_curinterp) { \
64 PERL_SET_INTERP(my_perl); \
65 INIT_THREADS; \
66 ALLOC_THREAD_KEY; \
534825c4
GS		 67 PERL_SET_THX(my_perl); \
68 OP_REFCNT_INIT; \
69 } \
70 else { \
71 PERL_SET_THX(my_perl); \
06d86050 72 } \
06d86050
GS		 73 } STMT_END
74# else
75# define INIT_TLS_AND_INTERP \
76 STMT_START { \
77 if (!PL_curinterp) { \
78 PERL_SET_INTERP(my_perl); \
79 } \
80 PERL_SET_THX(my_perl); \
81 } STMT_END
82# endif
83#endif
84
32e30700
GS		 85#ifdef PERL_IMPLICIT_SYS
86PerlInterpreter *
7766f137
GS		 87perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
88 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
32e30700
GS		 89 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
90 struct IPerlDir* ipD, struct IPerlSock* ipS,
91 struct IPerlProc* ipP)
92{
93 PerlInterpreter *my_perl;
7766f137
GS		 94#ifdef PERL_OBJECT
95 my_perl = (PerlInterpreter*)new(ipM) CPerlObj(ipM, ipMS, ipMP, ipE, ipStd,
96 ipLIO, ipD, ipS, ipP);
06d86050 97 INIT_TLS_AND_INTERP;
7766f137 98#else
32e30700
GS		 99 /* New() needs interpreter, so call malloc() instead */
100 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 101 INIT_TLS_AND_INTERP;
32e30700
GS		 102 Zero(my_perl, 1, PerlInterpreter);
103 PL_Mem = ipM;
7766f137
GS		 104 PL_MemShared = ipMS;
105 PL_MemParse = ipMP;
32e30700
GS		 106 PL_Env = ipE;
107 PL_StdIO = ipStd;
108 PL_LIO = ipLIO;
109 PL_Dir = ipD;
110 PL_Sock = ipS;
111 PL_Proc = ipP;
7766f137
GS		 112#endif
113
32e30700
GS		 114 return my_perl;
115}
116#else
954c1994
GS		 117
118/*
119=for apidoc perl_alloc
120
121Allocates a new Perl interpreter. See L<perlembed>.
122
123=cut
124*/
125
93a17b20 126PerlInterpreter *
cea2e8a9 127perl_alloc(void)
79072805 128{
cea2e8a9 129 PerlInterpreter *my_perl;
79072805 130
54aff467 131 /* New() needs interpreter, so call malloc() instead */
e8ee3774 132 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 133
06d86050 134 INIT_TLS_AND_INTERP;
dedcbb81 135 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 136 return my_perl;
79072805 137}
32e30700 138#endif /* PERL_IMPLICIT_SYS */
79072805 139
954c1994
GS		 140/*
141=for apidoc perl_construct
142
143Initializes a new Perl interpreter. See L<perlembed>.
144
145=cut
146*/
147
79072805 148void
0cb96387 149perl_construct(pTHXx)
79072805 150{
a863c7d1
MB		 151#ifdef USE_THREADS
152 int i;
153#ifndef FAKE_THREADS
e1f15930 154 struct perl_thread *thr = NULL;
a863c7d1
MB		 155#endif /* FAKE_THREADS */
156#endif /* USE_THREADS */
ba869deb 157
8990e307 158#ifdef MULTIPLICITY
54aff467 159 init_interp();
ac27b0f5 160 PL_perl_destruct_level = 1;
54aff467
GS		 161#else
162 if (PL_perl_destruct_level > 0)
163 init_interp();
164#endif
165
33f46ff6 166 /* Init the real globals (and main thread)? */
3280af22 167 if (!PL_linestr) {
1feb2720 168#ifdef USE_THREADS
533c011a 169 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB		 170 /*
171 * Safe to use basic SV functions from now on (though
172 * not things like mortals or tainting yet).
173 */
533c011a
NIS		 174 MUTEX_INIT(&PL_eval_mutex);
175 COND_INIT(&PL_eval_cond);
176 MUTEX_INIT(&PL_threads_mutex);
177 COND_INIT(&PL_nthreads_cond);
ba869deb 178# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 179 MUTEX_INIT(&PL_svref_mutex);
ba869deb 180# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 181
5ff3f7a4 182 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS		 183 MUTEX_INIT(&PL_sv_lock_mutex);
184 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 185
199100c8 186 thr = init_main_thread();
11343788
MB		 187#endif /* USE_THREADS */
188
14dd3ad8 189#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 190 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 191#endif
312caa8e 192
2aea9f8a
GS		 193 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
194
3280af22
NIS		 195 PL_linestr = NEWSV(65,79);
196 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 197
3280af22 198 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP		 199 /* set read-only and try to insure than we wont see REFCNT==0
200 very often */
201
3280af22
NIS		 202 SvREADONLY_on(&PL_sv_undef);
203 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 204
3280af22
NIS		 205 sv_setpv(&PL_sv_no,PL_No);
206 SvNV(&PL_sv_no);
207 SvREADONLY_on(&PL_sv_no);
208 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 209
3280af22
NIS		 210 sv_setpv(&PL_sv_yes,PL_Yes);
211 SvNV(&PL_sv_yes);
212 SvREADONLY_on(&PL_sv_yes);
213 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 214 }
79072805 215
76e3520e
GS		 216#ifdef PERL_OBJECT
217 /* TODO: */
6b88bc9c 218 /* PL_sighandlerp = sighandler; */
76e3520e 219#else
cea2e8a9 220 PL_sighandlerp = Perl_sighandler;
76e3520e 221#endif
3280af22 222 PL_pidstatus = newHV();
44a8e56a 223
79072805
LW		 224#ifdef MSDOS
225 /*
226 * There is no way we can refer to them from Perl so close them to save
227 * space. The other alternative would be to provide STDAUX and STDPRN
228 * filehandles.
229 */
230 (void)fclose(stdaux);
231 (void)fclose(stdprn);
232#endif
233 }
234
79cb57f6 235 PL_nrs = newSVpvn("\n", 1);
3280af22 236 PL_rs = SvREFCNT_inc(PL_nrs);
dc92893f 237
cea2e8a9 238 init_stacks();
79072805 239
748a9306 240 init_ids();
3280af22 241 PL_lex_state = LEX_NOTPARSING;
a5f75d66 242
312caa8e 243 JMPENV_BOOTSTRAP;
f86702cc 244 STATUS_ALL_SUCCESS;
245
0672f40e 246 init_i18nl10n(1);
36477c24 247 SET_NUMERIC_STANDARD();
0b5b802d 248
a7cb1f99
GS		 249 {
250 U8 *s;
251 PL_patchlevel = NEWSV(0,4);
155aba94 252 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 253 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 254 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99
GS		 255 s = (U8*)SvPVX(PL_patchlevel);
256 s = uv_to_utf8(s, (UV)PERL_REVISION);
257 s = uv_to_utf8(s, (UV)PERL_VERSION);
258 s = uv_to_utf8(s, (UV)PERL_SUBVERSION);
259 *s = '\0';
260 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
261 SvPOK_on(PL_patchlevel);
262 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
263 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 264#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 265 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 266#endif
a7cb1f99
GS		 267 ;
268 SvNOK_on(PL_patchlevel); /* dual valued */
269 SvUTF8_on(PL_patchlevel);
270 SvREADONLY_on(PL_patchlevel);
271 }
79072805 272
ab821d7f 273#if defined(LOCAL_PATCH_COUNT)
3280af22 274 PL_localpatches = local_patches; /* For possible -v */
ab821d7f 275#endif
276
52853b95
GS		 277#ifdef HAVE_INTERP_INTERN
278 sys_intern_init();
279#endif
280
4b556e6c 281 PerlIO_init(); /* Hook to IO system */
760ac839 282
3280af22
NIS		 283 PL_fdpid = newAV(); /* for remembering popen pids by fd */
284 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 285 PL_errors = newSVpvn("",0);
8990e307 286
8990e307 287 ENTER;
79072805
LW		 288}
289
954c1994
GS		 290/*
291=for apidoc perl_destruct
292
293Shuts down a Perl interpreter. See L<perlembed>.
294
295=cut
296*/
297
79072805 298void
0cb96387 299perl_destruct(pTHXx)
79072805 300{
748a9306 301 int destruct_level; /* 0=none, 1=full, 2=full with checks */
8990e307 302 I32 last_sv_count;
a0d0e21e 303 HV *hv;
1f2bfc8a 304#ifdef USE_THREADS
33f46ff6 305 Thread t;
cea2e8a9 306 dTHX;
1f2bfc8a 307#endif /* USE_THREADS */
8990e307 308
7766f137
GS		 309 /* wait for all pseudo-forked children to finish */
310 PERL_WAIT_FOR_CHILDREN;
311
11343788 312#ifdef USE_THREADS
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) */
11343788
MB		 381#endif /* USE_THREADS */
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
8990e307 395 LEAVE;
a0d0e21e
LW		 396 FREETMPS;
397
ff0cee69 398 /* We must account for everything. */
399
400 /* Destroy the main CV and syntax tree */
3280af22
NIS		 401 if (PL_main_root) {
402 PL_curpad = AvARRAY(PL_comppad);
403 op_free(PL_main_root);
404 PL_main_root = Nullop;
a0d0e21e 405 }
3280af22
NIS		 406 PL_curcop = &PL_compiling;
407 PL_main_start = Nullop;
408 SvREFCNT_dec(PL_main_cv);
409 PL_main_cv = Nullcv;
24d3c518 410 PL_dirty = TRUE;
ff0cee69 411
3280af22 412 if (PL_sv_objcount) {
a0d0e21e
LW		 413 /*
414 * Try to destruct global references. We do this first so that the
415 * destructors and destructees still exist. Some sv's might remain.
416 * Non-referenced objects are on their own.
417 */
a0d0e21e 418 sv_clean_objs();
8990e307
LW		 419 }
420
5cd24f17 421 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS		 422 SvREFCNT_dec(PL_warnhook);
423 PL_warnhook = Nullsv;
424 SvREFCNT_dec(PL_diehook);
425 PL_diehook = Nullsv;
5cd24f17 426
4b556e6c 427 /* call exit list functions */
3280af22 428 while (PL_exitlistlen-- > 0)
0cb96387 429 PL_exitlist[PL_exitlistlen].fn(aTHXo_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 430
3280af22 431 Safefree(PL_exitlist);
4b556e6c 432
a0d0e21e 433 if (destruct_level == 0){
8990e307 434
a0d0e21e 435 DEBUG_P(debprofdump());
ac27b0f5 436
a0d0e21e
LW		 437 /* The exit() function will do everything that needs doing. */
438 return;
439 }
5dd60ef7 440
5f05dabc 441 /* loosen bonds of global variables */
442
3280af22
NIS		 443 if(PL_rsfp) {
444 (void)PerlIO_close(PL_rsfp);
445 PL_rsfp = Nullfp;
8ebc5c01 446 }
447
448 /* Filters for program text */
3280af22
NIS		 449 SvREFCNT_dec(PL_rsfp_filters);
450 PL_rsfp_filters = Nullav;
8ebc5c01 451
452 /* switches */
3280af22
NIS		 453 PL_preprocess = FALSE;
454 PL_minus_n = FALSE;
455 PL_minus_p = FALSE;
456 PL_minus_l = FALSE;
457 PL_minus_a = FALSE;
458 PL_minus_F = FALSE;
459 PL_doswitches = FALSE;
599cee73 460 PL_dowarn = G_WARN_OFF;
3280af22
NIS		 461 PL_doextract = FALSE;
462 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS		 463 PL_unsafe = FALSE;
464
465 Safefree(PL_inplace);
466 PL_inplace = Nullch;
a7cb1f99 467 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS		 468
469 if (PL_e_script) {
470 SvREFCNT_dec(PL_e_script);
471 PL_e_script = Nullsv;
8ebc5c01 472 }
473
474 /* magical thingies */
475
7889fe52
NIS		 476 SvREFCNT_dec(PL_ofs_sv); /* $, */
477 PL_ofs_sv = Nullsv;
5f05dabc 478
7889fe52
NIS		 479 SvREFCNT_dec(PL_ors_sv); /* $\ */
480 PL_ors_sv = Nullsv;
8ebc5c01 481
3280af22
NIS		 482 SvREFCNT_dec(PL_rs); /* $/ */
483 PL_rs = Nullsv;
dc92893f 484
3280af22
NIS		 485 SvREFCNT_dec(PL_nrs); /* $/ helper */
486 PL_nrs = Nullsv;
5f05dabc 487
d33b2eba
GS		 488 PL_multiline = 0; /* $* */
489 Safefree(PL_osname); /* $^O */
490 PL_osname = Nullch;
5f05dabc 491
3280af22
NIS		 492 SvREFCNT_dec(PL_statname);
493 PL_statname = Nullsv;
494 PL_statgv = Nullgv;
5f05dabc 495
8ebc5c01 496 /* defgv, aka *_ should be taken care of elsewhere */
497
8ebc5c01 498 /* clean up after study() */
3280af22
NIS		 499 SvREFCNT_dec(PL_lastscream);
500 PL_lastscream = Nullsv;
501 Safefree(PL_screamfirst);
502 PL_screamfirst = 0;
503 Safefree(PL_screamnext);
504 PL_screamnext = 0;
8ebc5c01 505
7d5ea4e7
GS		 506 /* float buffer */
507 Safefree(PL_efloatbuf);
508 PL_efloatbuf = Nullch;
509 PL_efloatsize = 0;
510
8ebc5c01 511 /* startup and shutdown function lists */
3280af22
NIS		 512 SvREFCNT_dec(PL_beginav);
513 SvREFCNT_dec(PL_endav);
7d30b5c4 514 SvREFCNT_dec(PL_checkav);
3280af22
NIS		 515 SvREFCNT_dec(PL_initav);
516 PL_beginav = Nullav;
517 PL_endav = Nullav;
7d30b5c4 518 PL_checkav = Nullav;
3280af22 519 PL_initav = Nullav;
5618dfe8 520
8ebc5c01 521 /* shortcuts just get cleared */
3280af22 522 PL_envgv = Nullgv;
3280af22
NIS		 523 PL_incgv = Nullgv;
524 PL_hintgv = Nullgv;
525 PL_errgv = Nullgv;
526 PL_argvgv = Nullgv;
527 PL_argvoutgv = Nullgv;
528 PL_stdingv = Nullgv;
bf49b057 529 PL_stderrgv = Nullgv;
3280af22
NIS		 530 PL_last_in_gv = Nullgv;
531 PL_replgv = Nullgv;
5c831c24 532 PL_debstash = Nullhv;
8ebc5c01 533
534 /* reset so print() ends up where we expect */
535 setdefout(Nullgv);
5c831c24 536
7a1c5554
GS		 537 SvREFCNT_dec(PL_argvout_stack);
538 PL_argvout_stack = Nullav;
8ebc5c01 539
5c831c24
GS		 540 SvREFCNT_dec(PL_modglobal);
541 PL_modglobal = Nullhv;
542 SvREFCNT_dec(PL_preambleav);
543 PL_preambleav = Nullav;
544 SvREFCNT_dec(PL_subname);
545 PL_subname = Nullsv;
546 SvREFCNT_dec(PL_linestr);
547 PL_linestr = Nullsv;
548 SvREFCNT_dec(PL_pidstatus);
549 PL_pidstatus = Nullhv;
550 SvREFCNT_dec(PL_toptarget);
551 PL_toptarget = Nullsv;
552 SvREFCNT_dec(PL_bodytarget);
553 PL_bodytarget = Nullsv;
554 PL_formtarget = Nullsv;
555
d33b2eba 556 /* free locale stuff */
b9582b6a 557#ifdef USE_LOCALE_COLLATE
d33b2eba
GS		 558 Safefree(PL_collation_name);
559 PL_collation_name = Nullch;
b9582b6a 560#endif
d33b2eba 561
b9582b6a 562#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS		 563 Safefree(PL_numeric_name);
564 PL_numeric_name = Nullch;
eff180cd 565 SvREFCNT_dec(PL_numeric_radix);
b9582b6a 566#endif
d33b2eba 567
5c831c24
GS		 568 /* clear utf8 character classes */
569 SvREFCNT_dec(PL_utf8_alnum);
570 SvREFCNT_dec(PL_utf8_alnumc);
571 SvREFCNT_dec(PL_utf8_ascii);
572 SvREFCNT_dec(PL_utf8_alpha);
573 SvREFCNT_dec(PL_utf8_space);
574 SvREFCNT_dec(PL_utf8_cntrl);
575 SvREFCNT_dec(PL_utf8_graph);
576 SvREFCNT_dec(PL_utf8_digit);
577 SvREFCNT_dec(PL_utf8_upper);
578 SvREFCNT_dec(PL_utf8_lower);
579 SvREFCNT_dec(PL_utf8_print);
580 SvREFCNT_dec(PL_utf8_punct);
581 SvREFCNT_dec(PL_utf8_xdigit);
582 SvREFCNT_dec(PL_utf8_mark);
583 SvREFCNT_dec(PL_utf8_toupper);
584 SvREFCNT_dec(PL_utf8_tolower);
585 PL_utf8_alnum = Nullsv;
586 PL_utf8_alnumc = Nullsv;
587 PL_utf8_ascii = Nullsv;
588 PL_utf8_alpha = Nullsv;
589 PL_utf8_space = Nullsv;
590 PL_utf8_cntrl = Nullsv;
591 PL_utf8_graph = Nullsv;
592 PL_utf8_digit = Nullsv;
593 PL_utf8_upper = Nullsv;
594 PL_utf8_lower = Nullsv;
595 PL_utf8_print = Nullsv;
596 PL_utf8_punct = Nullsv;
597 PL_utf8_xdigit = Nullsv;
598 PL_utf8_mark = Nullsv;
599 PL_utf8_toupper = Nullsv;
600 PL_utf8_totitle = Nullsv;
601 PL_utf8_tolower = Nullsv;
602
971a9dd3
GS		 603 if (!specialWARN(PL_compiling.cop_warnings))
604 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 605 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS		 606 if (!specialCopIO(PL_compiling.cop_io))
607 SvREFCNT_dec(PL_compiling.cop_io);
608 PL_compiling.cop_io = Nullsv;
f4dd75d9
GS		 609#ifdef USE_ITHREADS
610 Safefree(CopFILE(&PL_compiling));
611 CopFILE(&PL_compiling) = Nullch;
612 Safefree(CopSTASHPV(&PL_compiling));
613#else
01724ea0 614 SvREFCNT_dec(CopFILEGV(&PL_compiling));
f4dd75d9
GS		 615 CopFILEGV(&PL_compiling) = Nullgv;
616 /* cop_stash is not refcounted */
01724ea0 617#endif
5c831c24 618
a0d0e21e 619 /* Prepare to destruct main symbol table. */
5f05dabc 620
3280af22
NIS		 621 hv = PL_defstash;
622 PL_defstash = 0;
a0d0e21e 623 SvREFCNT_dec(hv);
5c831c24
GS		 624 SvREFCNT_dec(PL_curstname);
625 PL_curstname = Nullsv;
a0d0e21e 626
5a844595
GS		 627 /* clear queued errors */
628 SvREFCNT_dec(PL_errors);
629 PL_errors = Nullsv;
630
a0d0e21e 631 FREETMPS;
0453d815 632 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 633 if (PL_scopestack_ix != 0)
0453d815
PM		 634 Perl_warner(aTHX_ WARN_INTERNAL,
635 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS		 636 (long)PL_scopestack_ix);
637 if (PL_savestack_ix != 0)
0453d815
PM		 638 Perl_warner(aTHX_ WARN_INTERNAL,
639 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS		 640 (long)PL_savestack_ix);
641 if (PL_tmps_floor != -1)
0453d815 642 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 643 (long)PL_tmps_floor + 1);
a0d0e21e 644 if (cxstack_ix != -1)
0453d815 645 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 646 (long)cxstack_ix + 1);
a0d0e21e 647 }
8990e307
LW		 648
649 /* Now absolutely destruct everything, somehow or other, loops or no. */
8990e307 650 last_sv_count = 0;
d33b2eba 651 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22
NIS		 652 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
653 while (PL_sv_count != 0 && PL_sv_count != last_sv_count) {
654 last_sv_count = PL_sv_count;
8990e307
LW		 655 sv_clean_all();
656 }
d33b2eba
GS		 657 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
658 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS		 659 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
660 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 661
d4777f27
GS		 662 AvREAL_off(PL_fdpid); /* no surviving entries */
663 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS		 664 PL_fdpid = Nullav;
665
6c644e78
GS		 666#ifdef HAVE_INTERP_INTERN
667 sys_intern_clear();
668#endif
669
6e72f9df 670 /* Destruct the global string table. */
671 {
672 /* Yell and reset the HeVAL() slots that are still holding refcounts,
673 * so that sv_free() won't fail on them.
674 */
675 I32 riter;
676 I32 max;
677 HE *hent;
678 HE **array;
679
680 riter = 0;
3280af22
NIS		 681 max = HvMAX(PL_strtab);
682 array = HvARRAY(PL_strtab);
6e72f9df 683 hent = array[0];
684 for (;;) {
0453d815
PM		 685 if (hent && ckWARN_d(WARN_INTERNAL)) {
686 Perl_warner(aTHX_ WARN_INTERNAL,
687 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df 688 HeVAL(hent) - Nullsv, HeKEY(hent));
689 HeVAL(hent) = Nullsv;
690 hent = HeNEXT(hent);
691 }
692 if (!hent) {
693 if (++riter > max)
694 break;
695 hent = array[riter];
696 }
697 }
698 }
3280af22 699 SvREFCNT_dec(PL_strtab);
6e72f9df 700
e652bb2f 701#ifdef USE_ITHREADS
a0739874
DM		 702 /* free the pointer table used for cloning */
703 ptr_table_free(PL_ptr_table);
53186e96 704#endif
a0739874 705
d33b2eba
GS		 706 /* free special SVs */
707
708 SvREFCNT(&PL_sv_yes) = 0;
709 sv_clear(&PL_sv_yes);
710 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 711 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS		 712
713 SvREFCNT(&PL_sv_no) = 0;
714 sv_clear(&PL_sv_no);
715 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 716 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS		 717
718 SvREFCNT(&PL_sv_undef) = 0;
719 SvREADONLY_off(&PL_sv_undef);
d33b2eba 720
0453d815
PM		 721 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
722 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 723
3280af22 724 Safefree(PL_origfilename);
3280af22 725 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ		 726 if (PL_reg_curpm)
727 Safefree(PL_reg_curpm);
82ba1be6 728 Safefree(PL_reg_poscache);
3280af22
NIS		 729 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
730 Safefree(PL_op_mask);
cf36064f
GS		 731 Safefree(PL_psig_ptr);
732 Safefree(PL_psig_name);
ce08f86c 733 Safefree(PL_psig_pend);
6e72f9df 734 nuke_stacks();
3280af22 735 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 736
a0d0e21e 737 DEBUG_P(debprofdump());
11343788 738#ifdef USE_THREADS
5f08fbcd 739 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS		 740 MUTEX_DESTROY(&PL_sv_mutex);
741 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 742 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 743 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 744 COND_DESTROY(&PL_eval_cond);
11d617a5
GS		 745#ifdef EMULATE_ATOMIC_REFCOUNTS
746 MUTEX_DESTROY(&PL_svref_mutex);
747#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 748
8023c3ce 749 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS		 750 Safefree(SvPVX(PL_thrsv));
751 Safefree(SvANY(PL_thrsv));
752 Safefree(PL_thrsv);
753 PL_thrsv = Nullsv;
8023c3ce 754#endif /* USE_THREADS */
d33b2eba 755
612f20c3
GS		 756 sv_free_arenas();
757
fc36a67e 758 /* As the absolutely last thing, free the non-arena SV for mess() */
759
3280af22 760 if (PL_mess_sv) {
9c63abab
GS		 761 /* it could have accumulated taint magic */
762 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
763 MAGIC* mg;
764 MAGIC* moremagic;
765 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
766 moremagic = mg->mg_moremagic;
767 if (mg->mg_ptr && mg->mg_type != 'g' && mg->mg_len >= 0)
768 Safefree(mg->mg_ptr);
769 Safefree(mg);
770 }
771 }
fc36a67e 772 /* we know that type >= SVt_PV */
155aba94 773 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS		 774 Safefree(SvPVX(PL_mess_sv));
775 Safefree(SvANY(PL_mess_sv));
776 Safefree(PL_mess_sv);
777 PL_mess_sv = Nullsv;
fc36a67e 778 }
79072805
LW		 779}
780
954c1994
GS		 781/*
782=for apidoc perl_free
783
784Releases a Perl interpreter. See L<perlembed>.
785
786=cut
787*/
788
79072805 789void
0cb96387 790perl_free(pTHXx)
79072805 791{
c5be433b 792#if defined(PERL_OBJECT)
7f0d82f7 793 PerlMem_free(this);
76e3520e 794#else
ce3e5b80
NIS		 795# if defined(WIN32)
796# if defined(PERL_IMPLICIT_SYS)
1c0ca838 797 void *host = w32_internal_host;
ba247512 798 if (PerlProc_lasthost()) {
ce08f86c 799 PerlIO_cleanup();
ba247512 800 }
7f0d82f7 801 PerlMem_free(aTHXx);
1c0ca838 802 win32_delete_internal_host(host);
ce3e5b80 803#else
ce08f86c 804 PerlIO_cleanup();
ce3e5b80
NIS		 805 PerlMem_free(aTHXx);
806#endif
1c0ca838
GS		 807# else
808 PerlMem_free(aTHXx);
809# endif
76e3520e 810#endif
79072805
LW		 811}
812
4b556e6c 813void
864dbfa3 814Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 815{
3280af22
NIS		 816 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
817 PL_exitlist[PL_exitlistlen].fn = fn;
818 PL_exitlist[PL_exitlistlen].ptr = ptr;
819 ++PL_exitlistlen;
4b556e6c
JD		 820}
821
954c1994
GS		 822/*
823=for apidoc perl_parse
824
825Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
826
827=cut
828*/
829
79072805 830int
0cb96387 831perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 832{
6224f72b 833 I32 oldscope;
6224f72b 834 int ret;
db36c5a1 835 dJMPENV;
cea2e8a9
GS		 836#ifdef USE_THREADS
837 dTHX;
838#endif
8d063cd8 839
a687059c
LW		 840#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
841#ifdef IAMSUID
842#undef IAMSUID
cea2e8a9 843 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW		 844setuid perl scripts securely.\n");
845#endif
846#endif
847
8f1f23e8 848#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
6e72f9df 849 _dyld_lookup_and_bind
850 ("__environ", (unsigned long *) &environ_pointer, NULL);
851#endif /* environ */
852
3280af22
NIS		 853 PL_origargv = argv;
854 PL_origargc = argc;
fa6a1c44 855#ifdef USE_ENVIRON_ARRAY
3280af22 856 PL_origenviron = environ;
a0d0e21e
LW		 857#endif
858
3280af22 859 if (PL_do_undump) {
a0d0e21e
LW		 860
861 /* Come here if running an undumped a.out. */
862
3280af22
NIS		 863 PL_origfilename = savepv(argv[0]);
864 PL_do_undump = FALSE;
a0d0e21e 865 cxstack_ix = -1; /* start label stack again */
748a9306 866 init_ids();
a0d0e21e
LW		 867 init_postdump_symbols(argc,argv,env);
868 return 0;
869 }
870
3280af22
NIS		 871 if (PL_main_root) {
872 PL_curpad = AvARRAY(PL_comppad);
873 op_free(PL_main_root);
874 PL_main_root = Nullop;
ff0cee69 875 }
3280af22
NIS		 876 PL_main_start = Nullop;
877 SvREFCNT_dec(PL_main_cv);
878 PL_main_cv = Nullcv;
79072805 879
3280af22
NIS		 880 time(&PL_basetime);
881 oldscope = PL_scopestack_ix;
599cee73 882 PL_dowarn = G_WARN_OFF;
f86702cc 883
14dd3ad8
GS		 884#ifdef PERL_FLEXIBLE_EXCEPTIONS
885 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
886#else
887 JMPENV_PUSH(ret);
888#endif
6224f72b 889 switch (ret) {
312caa8e 890 case 0:
14dd3ad8
GS		 891#ifndef PERL_FLEXIBLE_EXCEPTIONS
892 parse_body(env,xsinit);
893#endif
7d30b5c4
GS		 894 if (PL_checkav)
895 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 896 ret = 0;
897 break;
6224f72b
GS		 898 case 1:
899 STATUS_ALL_FAILURE;
900 /* FALL THROUGH */
901 case 2:
902 /* my_exit() was called */
3280af22 903 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 904 LEAVE;
905 FREETMPS;
3280af22 906 PL_curstash = PL_defstash;
7d30b5c4
GS		 907 if (PL_checkav)
908 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 909 ret = STATUS_NATIVE_EXPORT;
910 break;
6224f72b 911 case 3:
bf49b057 912 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS		 913 ret = 1;
914 break;
6224f72b 915 }
14dd3ad8
GS		 916 JMPENV_POP;
917 return ret;
918}
919
920#ifdef PERL_FLEXIBLE_EXCEPTIONS
921STATIC void *
922S_vparse_body(pTHX_ va_list args)
923{
924 char **env = va_arg(args, char**);
925 XSINIT_t xsinit = va_arg(args, XSINIT_t);
926
927 return parse_body(env, xsinit);
312caa8e 928}
14dd3ad8 929#endif
312caa8e
CS		 930
931STATIC void *
14dd3ad8 932S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 933{
312caa8e
CS		 934 int argc = PL_origargc;
935 char **argv = PL_origargv;
312caa8e
CS		 936 char *scriptname = NULL;
937 int fdscript = -1;
938 VOL bool dosearch = FALSE;
939 char *validarg = "";
940 AV* comppadlist;
941 register SV *sv;
942 register char *s;
f4c556ac 943 char *cddir = Nullch;
312caa8e 944
3280af22 945 sv_setpvn(PL_linestr,"",0);
79cb57f6 946 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS		 947 SAVEFREESV(sv);
948 init_main_stash();
54310121 949
6224f72b
GS		 950 for (argc--,argv++; argc > 0; argc--,argv++) {
951 if (argv[0][0] != '-' || !argv[0][1])
952 break;
953#ifdef DOSUID
954 if (*validarg)
955 validarg = " PHOOEY ";
956 else
957 validarg = argv[0];
13281fa4 958#endif
6224f72b
GS		 959 s = argv[0]+1;
960 reswitch:
961 switch (*s) {
729a02f2
GS		 962 case 'C':
963#ifdef WIN32
c0932edc 964 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS		 965 /* FALL THROUGH */
966#endif
1d5472a9
GS		 967#ifndef PERL_STRICT_CR
968 case '\r':
969#endif
6224f72b
GS		 970 case ' ':
971 case '0':
972 case 'F':
973 case 'a':
974 case 'c':
975 case 'd':
976 case 'D':
977 case 'h':
978 case 'i':
979 case 'l':
980 case 'M':
981 case 'm':
982 case 'n':
983 case 'p':
984 case 's':
985 case 'u':
986 case 'U':
987 case 'v':
599cee73
PM		 988 case 'W':
989 case 'X':
6224f72b 990 case 'w':
155aba94 991 if ((s = moreswitches(s)))
6224f72b
GS		 992 goto reswitch;
993 break;
33b78306 994
6224f72b 995 case 'T':
3280af22 996 PL_tainting = TRUE;
6224f72b
GS		 997 s++;
998 goto reswitch;
f86702cc 999
6224f72b 1000 case 'e':
bf4acbe4
GS		 1001#ifdef MACOS_TRADITIONAL
1002 /* ignore -e for Dev:Pseudo argument */
1003 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1004 break;
bf4acbe4 1005#endif
3280af22 1006 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1007 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1008 if (!PL_e_script) {
79cb57f6 1009 PL_e_script = newSVpvn("",0);
0cb96387 1010 filter_add(read_e_script, NULL);
6224f72b
GS		 1011 }
1012 if (*++s)
3280af22 1013 sv_catpv(PL_e_script, s);
6224f72b 1014 else if (argv[1]) {
3280af22 1015 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS		 1016 argc--,argv++;
1017 }
1018 else
cea2e8a9 1019 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1020 sv_catpv(PL_e_script, "\n");
6224f72b 1021 break;
afe37c7d 1022
6224f72b
GS		 1023 case 'I': /* -I handled both here and in moreswitches() */
1024 forbid_setid("-I");
1025 if (!*++s && (s=argv[1]) != Nullch) {
1026 argc--,argv++;
1027 }
6224f72b 1028 if (s && *s) {
0df16ed7
GS		 1029 char *p;
1030 STRLEN len = strlen(s);
1031 p = savepvn(s, len);
9c8a64f0 1032 incpush(p, TRUE, TRUE);
0df16ed7
GS		 1033 sv_catpvn(sv, "-I", 2);
1034 sv_catpvn(sv, p, len);
1035 sv_catpvn(sv, " ", 1);
6224f72b 1036 Safefree(p);
0df16ed7
GS		 1037 }
1038 else
a67e862a 1039 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS		 1040 break;
1041 case 'P':
1042 forbid_setid("-P");
3280af22 1043 PL_preprocess = TRUE;
6224f72b
GS		 1044 s++;
1045 goto reswitch;
1046 case 'S':
1047 forbid_setid("-S");
1048 dosearch = TRUE;
1049 s++;
1050 goto reswitch;
1051 case 'V':
3280af22
NIS		 1052 if (!PL_preambleav)
1053 PL_preambleav = newAV();
1054 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1055 if (*++s != ':') {
3280af22 1056 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1057#ifdef VMS
6b88bc9c 1058 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1059#else
3280af22 1060 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1061#endif
3280af22 1062 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1063# ifdef DEBUGGING
3280af22 1064 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1065# endif
6224f72b 1066# ifdef MULTIPLICITY
8f872242 1067 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1068# endif
b363f7ed
GS		 1069# ifdef USE_THREADS
1070 sv_catpv(PL_Sv," USE_THREADS");
1071# endif
ac5e8965
JH		 1072# ifdef USE_ITHREADS
1073 sv_catpv(PL_Sv," USE_ITHREADS");
1074# endif
10cc9d2a
JH		 1075# ifdef USE_64_BIT_INT
1076 sv_catpv(PL_Sv," USE_64_BIT_INT");
1077# endif
1078# ifdef USE_64_BIT_ALL
1079 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH		 1080# endif
1081# ifdef USE_LONG_DOUBLE
1082 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1083# endif
53430762
JH		 1084# ifdef USE_LARGE_FILES
1085 sv_catpv(PL_Sv," USE_LARGE_FILES");
1086# endif
ac5e8965
JH		 1087# ifdef USE_SOCKS
1088 sv_catpv(PL_Sv," USE_SOCKS");
1089# endif
b363f7ed
GS		 1090# ifdef PERL_OBJECT
1091 sv_catpv(PL_Sv," PERL_OBJECT");
1092# endif
1093# ifdef PERL_IMPLICIT_CONTEXT
1094 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1095# endif
1096# ifdef PERL_IMPLICIT_SYS
1097 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1098# endif
3280af22 1099 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1100
6224f72b
GS		 1101#if defined(LOCAL_PATCH_COUNT)
1102 if (LOCAL_PATCH_COUNT > 0) {
1103 int i;
3280af22 1104 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1105 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1106 if (PL_localpatches[i])
cea2e8a9 1107 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS		 1108 }
1109 }
1110#endif
cea2e8a9 1111 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS		 1112#ifdef __DATE__
1113# ifdef __TIME__
cea2e8a9 1114 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1115# else
cea2e8a9 1116 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS		 1117# endif
1118#endif
3280af22 1119 sv_catpv(PL_Sv, "; \
6224f72b
GS		 1120$\"=\"\\n \"; \
1121@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
1122print \" \\%ENV:\\n @env\\n\" if @env; \
1123print \" \\@INC:\\n @INC\\n\";");
1124 }
1125 else {
3280af22
NIS		 1126 PL_Sv = newSVpv("config_vars(qw(",0);
1127 sv_catpv(PL_Sv, ++s);
1128 sv_catpv(PL_Sv, "))");
6224f72b
GS		 1129 s += strlen(s);
1130 }
3280af22 1131 av_push(PL_preambleav, PL_Sv);
6224f72b
GS		 1132 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1133 goto reswitch;
1134 case 'x':
3280af22 1135 PL_doextract = TRUE;
6224f72b
GS		 1136 s++;
1137 if (*s)
f4c556ac 1138 cddir = s;
6224f72b
GS		 1139 break;
1140 case 0:
1141 break;
1142 case '-':
1143 if (!*++s || isSPACE(*s)) {
1144 argc--,argv++;
1145 goto switch_end;
1146 }
1147 /* catch use of gnu style long options */
1148 if (strEQ(s, "version")) {
1149 s = "v";
1150 goto reswitch;
1151 }
1152 if (strEQ(s, "help")) {
1153 s = "h";
1154 goto reswitch;
1155 }
1156 s--;
1157 /* FALL THROUGH */
1158 default:
cea2e8a9 1159 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW		 1160 }
1161 }
6224f72b 1162 switch_end:
54310121 1163
f675dbe5
CB		 1164 if (
1165#ifndef SECURE_INTERNAL_GETENV
1166 !PL_tainting &&
1167#endif
0df16ed7
GS		 1168 (s = PerlEnv_getenv("PERL5OPT")))
1169 {
74288ac8
GS		 1170 while (isSPACE(*s))
1171 s++;
1172 if (*s == '-' && *(s+1) == 'T')
1173 PL_tainting = TRUE;
1174 else {
1175 while (s && *s) {
4ea8f8fb 1176 char *d;
74288ac8
GS		 1177 while (isSPACE(*s))
1178 s++;
1179 if (*s == '-') {
1180 s++;
1181 if (isSPACE(*s))
1182 continue;
1183 }
4ea8f8fb 1184 d = s;
74288ac8
GS		 1185 if (!*s)
1186 break;
1187 if (!strchr("DIMUdmw", *s))
cea2e8a9 1188 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS		 1189 while (++s && *s) {
1190 if (isSPACE(*s)) {
1191 *s++ = '\0';
1192 break;
1193 }
1194 }
1195 moreswitches(d);
6224f72b 1196 }
6224f72b
GS		 1197 }
1198 }
a0d0e21e 1199
6224f72b
GS		 1200 if (!scriptname)
1201 scriptname = argv[0];
3280af22 1202 if (PL_e_script) {
6224f72b
GS		 1203 argc++,argv--;
1204 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1205 }
1206 else if (scriptname == Nullch) {
1207#ifdef MSDOS
1208 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1209 moreswitches("h");
1210#endif
1211 scriptname = "-";
1212 }
1213
1214 init_perllib();
1215
1216 open_script(scriptname,dosearch,sv,&fdscript);
1217
1218 validate_suid(validarg, scriptname,fdscript);
1219
64ca3a65 1220#ifndef PERL_MICRO
0b5b802d
GS		 1221#if defined(SIGCHLD) || defined(SIGCLD)
1222 {
1223#ifndef SIGCHLD
1224# define SIGCHLD SIGCLD
1225#endif
1226 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1227 if (sigstate == SIG_IGN) {
1228 if (ckWARN(WARN_SIGNAL))
1229 Perl_warner(aTHX_ WARN_SIGNAL,
1230 "Can't ignore signal CHLD, forcing to default");
1231 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1232 }
1233 }
1234#endif
64ca3a65 1235#endif
0b5b802d 1236
bf4acbe4
GS		 1237#ifdef MACOS_TRADITIONAL
1238 if (PL_doextract || gMacPerl_AlwaysExtract) {
1239#else
f4c556ac 1240 if (PL_doextract) {
bf4acbe4 1241#endif
6224f72b 1242 find_beginning();
f4c556ac
GS		 1243 if (cddir && PerlDir_chdir(cddir) < 0)
1244 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1245
1246 }
6224f72b 1247
3280af22
NIS		 1248 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1249 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1250 CvUNIQUE_on(PL_compcv);
1251
1252 PL_comppad = newAV();
1253 av_push(PL_comppad, Nullsv);
1254 PL_curpad = AvARRAY(PL_comppad);
1255 PL_comppad_name = newAV();
1256 PL_comppad_name_fill = 0;
1257 PL_min_intro_pending = 0;
1258 PL_padix = 0;
6224f72b 1259#ifdef USE_THREADS
79cb57f6 1260 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS		 1261 PL_curpad[0] = (SV*)newAV();
1262 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1263 CvOWNER(PL_compcv) = 0;
1264 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1265 MUTEX_INIT(CvMUTEXP(PL_compcv));
6224f72b
GS		 1266#endif /* USE_THREADS */
1267
1268 comppadlist = newAV();
1269 AvREAL_off(comppadlist);
3280af22
NIS		 1270 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1271 av_store(comppadlist, 1, (SV*)PL_comppad);
1272 CvPADLIST(PL_compcv) = comppadlist;
6224f72b
GS		 1273
1274 boot_core_UNIVERSAL();
9a34ef1d 1275#ifndef PERL_MICRO
09bef843 1276 boot_core_xsutils();
9a34ef1d 1277#endif
6224f72b
GS		 1278
1279 if (xsinit)
0cb96387 1280 (*xsinit)(aTHXo); /* in case linked C routines want magical variables */
64ca3a65 1281#ifndef PERL_MICRO
ed79a026 1282#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1283 init_os_extras();
6224f72b 1284#endif
64ca3a65 1285#endif
6224f72b 1286
29209bc5 1287#ifdef USE_SOCKS
1b9c9cf5
DH		 1288# ifdef HAS_SOCKS5_INIT
1289 socks5_init(argv[0]);
1290# else
29209bc5 1291 SOCKSinit(argv[0]);
1b9c9cf5 1292# endif
ac27b0f5 1293#endif
29209bc5 1294
6224f72b
GS		 1295 init_predump_symbols();
1296 /* init_postdump_symbols not currently designed to be called */
1297 /* more than once (ENV isn't cleared first, for example) */
1298 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1299 if (!PL_do_undump)
6224f72b
GS		 1300 init_postdump_symbols(argc,argv,env);
1301
1302 init_lexer();
1303
1304 /* now parse the script */
1305
1306 SETERRNO(0,SS$_NORMAL);
3280af22 1307 PL_error_count = 0;
bf4acbe4
GS		 1308#ifdef MACOS_TRADITIONAL
1309 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1310 if (PL_minus_c)
1311 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1312 else {
1313 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1314 MacPerl_MPWFileName(PL_origfilename));
1315 }
1316 }
1317#else
3280af22
NIS		 1318 if (yyparse() || PL_error_count) {
1319 if (PL_minus_c)
cea2e8a9 1320 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1321 else {
cea2e8a9 1322 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1323 PL_origfilename);
6224f72b
GS		 1324 }
1325 }
bf4acbe4 1326#endif
57843af0 1327 CopLINE_set(PL_curcop, 0);
3280af22
NIS		 1328 PL_curstash = PL_defstash;
1329 PL_preprocess = FALSE;
1330 if (PL_e_script) {
1331 SvREFCNT_dec(PL_e_script);
1332 PL_e_script = Nullsv;
6224f72b
GS		 1333 }
1334
1335 /* now that script is parsed, we can modify record separator */
3280af22
NIS		 1336 SvREFCNT_dec(PL_rs);
1337 PL_rs = SvREFCNT_inc(PL_nrs);
864dbfa3 1338 sv_setsv(get_sv("/", TRUE), PL_rs);
3280af22 1339 if (PL_do_undump)
6224f72b
GS		 1340 my_unexec();
1341
57843af0
GS		 1342 if (isWARN_ONCE) {
1343 SAVECOPFILE(PL_curcop);
1344 SAVECOPLINE(PL_curcop);
3280af22 1345 gv_check(PL_defstash);
57843af0 1346 }
6224f72b
GS		 1347
1348 LEAVE;
1349 FREETMPS;
1350
1351#ifdef MYMALLOC
1352 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1353 dump_mstats("after compilation:");
1354#endif
1355
1356 ENTER;
3280af22 1357 PL_restartop = 0;
312caa8e 1358 return NULL;
6224f72b
GS		 1359}
1360
954c1994
GS		 1361/*
1362=for apidoc perl_run
1363
1364Tells a Perl interpreter to run. See L<perlembed>.
1365
1366=cut
1367*/
1368
6224f72b 1369int
0cb96387 1370perl_run(pTHXx)
6224f72b 1371{
6224f72b 1372 I32 oldscope;
14dd3ad8 1373 int ret = 0;
db36c5a1 1374 dJMPENV;
cea2e8a9
GS		 1375#ifdef USE_THREADS
1376 dTHX;
1377#endif
6224f72b 1378
3280af22 1379 oldscope = PL_scopestack_ix;
6224f72b 1380
14dd3ad8 1381#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1382 redo_body:
14dd3ad8
GS		 1383 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1384#else
1385 JMPENV_PUSH(ret);
1386#endif
6224f72b
GS		 1387 switch (ret) {
1388 case 1:
1389 cxstack_ix = -1; /* start context stack again */
312caa8e 1390 goto redo_body;
14dd3ad8
GS		 1391 case 0: /* normal completion */
1392#ifndef PERL_FLEXIBLE_EXCEPTIONS
1393 redo_body:
1394 run_body(oldscope);
1395#endif
1396 /* FALL THROUGH */
1397 case 2: /* my_exit() */
3280af22 1398 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1399 LEAVE;
1400 FREETMPS;
3280af22 1401 PL_curstash = PL_defstash;
865be832 1402 if (PL_endav && !PL_minus_c)
3280af22 1403 call_list(oldscope, PL_endav);
6224f72b
GS		 1404#ifdef MYMALLOC
1405 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1406 dump_mstats("after execution: ");
1407#endif
14dd3ad8
GS		 1408 ret = STATUS_NATIVE_EXPORT;
1409 break;
6224f72b 1410 case 3:
312caa8e
CS		 1411 if (PL_restartop) {
1412 POPSTACK_TO(PL_mainstack);
1413 goto redo_body;
6224f72b 1414 }
bf49b057 1415 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1416 FREETMPS;
14dd3ad8
GS		 1417 ret = 1;
1418 break;
6224f72b
GS		 1419 }
1420
14dd3ad8
GS		 1421 JMPENV_POP;
1422 return ret;
312caa8e
CS		 1423}
1424
14dd3ad8 1425#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1426STATIC void *
14dd3ad8 1427S_vrun_body(pTHX_ va_list args)
312caa8e 1428{
312caa8e
CS		 1429 I32 oldscope = va_arg(args, I32);
1430
14dd3ad8
GS		 1431 return run_body(oldscope);
1432}
1433#endif
1434
1435
1436STATIC void *
1437S_run_body(pTHX_ I32 oldscope)
1438{
6224f72b 1439 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1440 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1441
3280af22 1442 if (!PL_restartop) {
6224f72b
GS		 1443 DEBUG_x(dump_all());
1444 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH		 1445 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1446 PTR2UV(thr)));
6224f72b 1447
3280af22 1448 if (PL_minus_c) {
bf4acbe4
GS		 1449#ifdef MACOS_TRADITIONAL
1450 PerlIO_printf(Perl_error_log, "%s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
1451#else
bf49b057 1452 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1453#endif
6224f72b
GS		 1454 my_exit(0);
1455 }
3280af22 1456 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1457 sv_setiv(PL_DBsingle, 1);
3280af22
NIS		 1458 if (PL_initav)
1459 call_list(oldscope, PL_initav);
6224f72b
GS		 1460 }
1461
1462 /* do it */
1463
3280af22 1464 if (PL_restartop) {
533c011a 1465 PL_op = PL_restartop;
3280af22 1466 PL_restartop = 0;
cea2e8a9 1467 CALLRUNOPS(aTHX);
6224f72b 1468 }
3280af22
NIS		 1469 else if (PL_main_start) {
1470 CvDEPTH(PL_main_cv) = 1;
533c011a 1471 PL_op = PL_main_start;
cea2e8a9 1472 CALLRUNOPS(aTHX);
6224f72b
GS		 1473 }
1474
f6b3007c
JH		 1475 my_exit(0);
1476 /* NOTREACHED */
312caa8e 1477 return NULL;
6224f72b
GS		 1478}
1479
954c1994
GS		 1480/*
1481=for apidoc p||get_sv
1482
1483Returns the SV of the specified Perl scalar. If C<create> is set and the
1484Perl variable does not exist then it will be created. If C<create> is not
1485set and the variable does not exist then NULL is returned.
1486
1487=cut
1488*/
1489
6224f72b 1490SV*
864dbfa3 1491Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS		 1492{
1493 GV *gv;
1494#ifdef USE_THREADS
1495 if (name[1] == '\0' && !isALPHA(name[0])) {
1496 PADOFFSET tmp = find_threadsv(name);
411caa50 1497 if (tmp != NOT_IN_PAD)
6224f72b 1498 return THREADSV(tmp);
6224f72b
GS		 1499 }
1500#endif /* USE_THREADS */
1501 gv = gv_fetchpv(name, create, SVt_PV);
1502 if (gv)
1503 return GvSV(gv);
1504 return Nullsv;
1505}
1506
954c1994
GS		 1507/*
1508=for apidoc p||get_av
1509
1510Returns the AV of the specified Perl array. If C<create> is set and the
1511Perl variable does not exist then it will be created. If C<create> is not
1512set and the variable does not exist then NULL is returned.
1513
1514=cut
1515*/
1516
6224f72b 1517AV*
864dbfa3 1518Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS		 1519{
1520 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1521 if (create)
1522 return GvAVn(gv);
1523 if (gv)
1524 return GvAV(gv);
1525 return Nullav;
1526}
1527
954c1994
GS		 1528/*
1529=for apidoc p||get_hv
1530
1531Returns the HV of the specified Perl hash. If C<create> is set and the
1532Perl variable does not exist then it will be created. If C<create> is not
1533set and the variable does not exist then NULL is returned.
1534
1535=cut
1536*/
1537
6224f72b 1538HV*
864dbfa3 1539Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1540{
a0d0e21e
LW		 1541 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1542 if (create)
1543 return GvHVn(gv);
1544 if (gv)
1545 return GvHV(gv);
1546 return Nullhv;
1547}
1548
954c1994
GS		 1549/*
1550=for apidoc p||get_cv
1551
1552Returns the CV of the specified Perl subroutine. If C<create> is set and
1553the Perl subroutine does not exist then it will be declared (which has the
1554same effect as saying C<sub name;>). If C<create> is not set and the
1555subroutine does not exist then NULL is returned.
1556
1557=cut
1558*/
1559
a0d0e21e 1560CV*
864dbfa3 1561Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW		 1562{
1563 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1564 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS		 1565 /* XXX this is probably not what they think they're getting.
1566 * It has the same effect as "sub name;", i.e. just a forward
1567 * declaration! */
8ebc5c01 1568 if (create && !GvCVu(gv))
774d564b 1569 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1570 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1571 Nullop,
a0d0e21e
LW		 1572 Nullop);
1573 if (gv)
8ebc5c01 1574 return GvCVu(gv);
a0d0e21e
LW		 1575 return Nullcv;
1576}
1577
79072805
LW		 1578/* Be sure to refetch the stack pointer after calling these routines. */
1579
954c1994
GS		 1580/*
1581=for apidoc p||call_argv
1582
1583Performs a callback to the specified Perl sub. See L<perlcall>.
1584
1585=cut
1586*/
1587
a0d0e21e 1588I32
864dbfa3 1589Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1590
8ac85365
NIS		 1591 /* See G_* flags in cop.h */
1592 /* null terminated arg list */
8990e307 1593{
a0d0e21e 1594 dSP;
8990e307 1595
924508f0 1596 PUSHMARK(SP);
a0d0e21e 1597 if (argv) {
8990e307 1598 while (*argv) {
a0d0e21e 1599 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW		 1600 argv++;
1601 }
a0d0e21e 1602 PUTBACK;
8990e307 1603 }
864dbfa3 1604 return call_pv(sub_name, flags);
8990e307
LW		 1605}
1606
954c1994
GS		 1607/*
1608=for apidoc p||call_pv
1609
1610Performs a callback to the specified Perl sub. See L<perlcall>.
1611
1612=cut
1613*/
1614
a0d0e21e 1615I32
864dbfa3 1616Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS		 1617 /* name of the subroutine */
1618 /* See G_* flags in cop.h */
a0d0e21e 1619{
864dbfa3 1620 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW		 1621}
1622
954c1994
GS		 1623/*
1624=for apidoc p||call_method
1625
1626Performs a callback to the specified Perl method. The blessed object must
1627be on the stack. See L<perlcall>.
1628
1629=cut
1630*/
1631
a0d0e21e 1632I32
864dbfa3 1633Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS		 1634 /* name of the subroutine */
1635 /* See G_* flags in cop.h */
a0d0e21e 1636{
968b3946 1637 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW		 1638}
1639
1640/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS		 1641/*
1642=for apidoc p||call_sv
1643
1644Performs a callback to the Perl sub whose name is in the SV. See
1645L<perlcall>.
1646
1647=cut
1648*/
1649
a0d0e21e 1650I32
864dbfa3 1651Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1652 /* See G_* flags in cop.h */
a0d0e21e 1653{
924508f0 1654 dSP;
a0d0e21e 1655 LOGOP myop; /* fake syntax tree node */
968b3946 1656 UNOP method_op;
aa689395 1657 I32 oldmark;
a0d0e21e 1658 I32 retval;
a0d0e21e 1659 I32 oldscope;
54310121 1660 bool oldcatch = CATCH_GET;
6224f72b 1661 int ret;
533c011a 1662 OP* oldop = PL_op;
db36c5a1 1663 dJMPENV;
1e422769 1664
a0d0e21e
LW		 1665 if (flags & G_DISCARD) {
1666 ENTER;
1667 SAVETMPS;
1668 }
1669
aa689395 1670 Zero(&myop, 1, LOGOP);
54310121 1671 myop.op_next = Nullop;
f51d4af5 1672 if (!(flags & G_NOARGS))
aa689395 1673 myop.op_flags |= OPf_STACKED;
54310121 1674 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1675 (flags & G_ARRAY) ? OPf_WANT_LIST :
1676 OPf_WANT_SCALAR);
462e5cf6 1677 SAVEOP();
533c011a 1678 PL_op = (OP*)&myop;
aa689395 1679
3280af22
NIS		 1680 EXTEND(PL_stack_sp, 1);
1681 *++PL_stack_sp = sv;
aa689395 1682 oldmark = TOPMARK;
3280af22 1683 oldscope = PL_scopestack_ix;
a0d0e21e 1684
3280af22 1685 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1686 /* Handle first BEGIN of -d. */
3280af22 1687 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24 1688 /* Try harder, since this may have been a sighandler, thus
1689 * curstash may be meaningless. */
3280af22 1690 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1691 && !(flags & G_NODEBUG))
533c011a 1692 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1693
968b3946
GS		 1694 if (flags & G_METHOD) {
1695 Zero(&method_op, 1, UNOP);
1696 method_op.op_next = PL_op;
1697 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1698 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1699 PL_op = (OP*)&method_op;
968b3946
GS		 1700 }
1701
312caa8e 1702 if (!(flags & G_EVAL)) {
0cdb2077 1703 CATCH_SET(TRUE);
14dd3ad8 1704 call_body((OP*)&myop, FALSE);
312caa8e 1705 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1706 CATCH_SET(oldcatch);
312caa8e
CS		 1707 }
1708 else {
d78bda3d 1709 myop.op_other = (OP*)&myop;
3280af22 1710 PL_markstack_ptr--;
4633a7c4
LW		 1711 /* we're trying to emulate pp_entertry() here */
1712 {
c09156bb 1713 register PERL_CONTEXT *cx;
54310121 1714 I32 gimme = GIMME_V;
ac27b0f5 1715
4633a7c4
LW		 1716 ENTER;
1717 SAVETMPS;
ac27b0f5 1718
968b3946 1719 push_return(Nullop);
1d76a5c3 1720 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1721 PUSHEVAL(cx, 0, 0);
533c011a 1722 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1723
faef0170 1724 PL_in_eval = EVAL_INEVAL;
4633a7c4 1725 if (flags & G_KEEPERR)
faef0170 1726 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1727 else
38a03e6e 1728 sv_setpv(ERRSV,"");
4633a7c4 1729 }
3280af22 1730 PL_markstack_ptr++;
a0d0e21e 1731
14dd3ad8
GS		 1732#ifdef PERL_FLEXIBLE_EXCEPTIONS
1733 redo_body:
1734 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1735 (OP*)&myop, FALSE);
14dd3ad8
GS		 1736#else
1737 JMPENV_PUSH(ret);
1738#endif
6224f72b
GS		 1739 switch (ret) {
1740 case 0:
14dd3ad8
GS		 1741#ifndef PERL_FLEXIBLE_EXCEPTIONS
1742 redo_body:
1743 call_body((OP*)&myop, FALSE);
1744#endif
312caa8e
CS		 1745 retval = PL_stack_sp - (PL_stack_base + oldmark);
1746 if (!(flags & G_KEEPERR))
1747 sv_setpv(ERRSV,"");
a0d0e21e 1748 break;
6224f72b 1749 case 1:
f86702cc 1750 STATUS_ALL_FAILURE;
a0d0e21e 1751 /* FALL THROUGH */
6224f72b 1752 case 2:
a0d0e21e 1753 /* my_exit() was called */
3280af22 1754 PL_curstash = PL_defstash;
a0d0e21e 1755 FREETMPS;
14dd3ad8 1756 JMPENV_POP;
cc3604b1 1757 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1758 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1759 my_exit_jump();
a0d0e21e 1760 /* NOTREACHED */
6224f72b 1761 case 3:
3280af22 1762 if (PL_restartop) {
533c011a 1763 PL_op = PL_restartop;
3280af22 1764 PL_restartop = 0;
312caa8e 1765 goto redo_body;
a0d0e21e 1766 }
3280af22 1767 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1768 if (flags & G_ARRAY)
1769 retval = 0;
1770 else {
1771 retval = 1;
3280af22 1772 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1773 }
312caa8e 1774 break;
a0d0e21e 1775 }
a0d0e21e 1776
3280af22 1777 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW		 1778 SV **newsp;
1779 PMOP *newpm;
1780 I32 gimme;
c09156bb 1781 register PERL_CONTEXT *cx;
a0a2876f
LW		 1782 I32 optype;
1783
1784 POPBLOCK(cx,newpm);
1785 POPEVAL(cx);
1786 pop_return();
3280af22 1787 PL_curpm = newpm;
a0a2876f 1788 LEAVE;
a0d0e21e 1789 }
14dd3ad8 1790 JMPENV_POP;
a0d0e21e 1791 }
1e422769 1792
a0d0e21e 1793 if (flags & G_DISCARD) {
3280af22 1794 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1795 retval = 0;
1796 FREETMPS;
1797 LEAVE;
1798 }
533c011a 1799 PL_op = oldop;
a0d0e21e
LW		 1800 return retval;
1801}
1802
14dd3ad8 1803#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1804STATIC void *
14dd3ad8 1805S_vcall_body(pTHX_ va_list args)
312caa8e
CS		 1806{
1807 OP *myop = va_arg(args, OP*);
1808 int is_eval = va_arg(args, int);
1809
14dd3ad8 1810 call_body(myop, is_eval);
312caa8e
CS		 1811 return NULL;
1812}
14dd3ad8 1813#endif
312caa8e
CS		 1814
1815STATIC void
14dd3ad8 1816S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1817{
312caa8e
CS		 1818 if (PL_op == myop) {
1819 if (is_eval)
f807eda9 1820 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1821 else
f807eda9 1822 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS		 1823 }
1824 if (PL_op)
cea2e8a9 1825 CALLRUNOPS(aTHX);
312caa8e
CS		 1826}
1827
6e72f9df 1828/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1829
954c1994
GS		 1830/*
1831=for apidoc p||eval_sv
1832
1833Tells Perl to C<eval> the string in the SV.
1834
1835=cut
1836*/
1837
a0d0e21e 1838I32
864dbfa3 1839Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1840
8ac85365 1841 /* See G_* flags in cop.h */
a0d0e21e 1842{
924508f0 1843 dSP;
a0d0e21e 1844 UNOP myop; /* fake syntax tree node */
3280af22 1845 I32 oldmark = SP - PL_stack_base;
4633a7c4 1846 I32 retval;
4633a7c4 1847 I32 oldscope;
6224f72b 1848 int ret;
533c011a 1849 OP* oldop = PL_op;
db36c5a1 1850 dJMPENV;
84902520 1851
4633a7c4
LW		 1852 if (flags & G_DISCARD) {
1853 ENTER;
1854 SAVETMPS;
1855 }
1856
462e5cf6 1857 SAVEOP();
533c011a
NIS		 1858 PL_op = (OP*)&myop;
1859 Zero(PL_op, 1, UNOP);
3280af22
NIS		 1860 EXTEND(PL_stack_sp, 1);
1861 *++PL_stack_sp = sv;
1862 oldscope = PL_scopestack_ix;
79072805 1863
4633a7c4
LW		 1864 if (!(flags & G_NOARGS))
1865 myop.op_flags = OPf_STACKED;
79072805 1866 myop.op_next = Nullop;
6e72f9df 1867 myop.op_type = OP_ENTEREVAL;
54310121 1868 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1869 (flags & G_ARRAY) ? OPf_WANT_LIST :
1870 OPf_WANT_SCALAR);
6e72f9df 1871 if (flags & G_KEEPERR)
1872 myop.op_flags |= OPf_SPECIAL;
4633a7c4 1873
14dd3ad8 1874#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1875 redo_body:
14dd3ad8 1876 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1877 (OP*)&myop, TRUE);
14dd3ad8
GS		 1878#else
1879 JMPENV_PUSH(ret);
1880#endif
6224f72b
GS		 1881 switch (ret) {
1882 case 0:
14dd3ad8
GS		 1883#ifndef PERL_FLEXIBLE_EXCEPTIONS
1884 redo_body:
1885 call_body((OP*)&myop,TRUE);
1886#endif
312caa8e
CS		 1887 retval = PL_stack_sp - (PL_stack_base + oldmark);
1888 if (!(flags & G_KEEPERR))
1889 sv_setpv(ERRSV,"");
4633a7c4 1890 break;
6224f72b 1891 case 1:
f86702cc 1892 STATUS_ALL_FAILURE;
4633a7c4 1893 /* FALL THROUGH */
6224f72b 1894 case 2:
4633a7c4 1895 /* my_exit() was called */
3280af22 1896 PL_curstash = PL_defstash;
4633a7c4 1897 FREETMPS;
14dd3ad8 1898 JMPENV_POP;
cc3604b1 1899 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1900 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1901 my_exit_jump();
4633a7c4 1902 /* NOTREACHED */
6224f72b 1903 case 3:
3280af22 1904 if (PL_restartop) {
533c011a 1905 PL_op = PL_restartop;
3280af22 1906 PL_restartop = 0;
312caa8e 1907 goto redo_body;
4633a7c4 1908 }
3280af22 1909 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 1910 if (flags & G_ARRAY)
1911 retval = 0;
1912 else {
1913 retval = 1;
3280af22 1914 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 1915 }
312caa8e 1916 break;
4633a7c4
LW		 1917 }
1918
14dd3ad8 1919 JMPENV_POP;
4633a7c4 1920 if (flags & G_DISCARD) {
3280af22 1921 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 1922 retval = 0;
1923 FREETMPS;
1924 LEAVE;
1925 }
533c011a 1926 PL_op = oldop;
4633a7c4
LW		 1927 return retval;
1928}
1929
954c1994
GS		 1930/*
1931=for apidoc p||eval_pv
1932
1933Tells Perl to C<eval> the given string and return an SV* result.
1934
1935=cut
1936*/
1937
137443ea 1938SV*
864dbfa3 1939Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 1940{
1941 dSP;
1942 SV* sv = newSVpv(p, 0);
1943
864dbfa3 1944 eval_sv(sv, G_SCALAR);
137443ea 1945 SvREFCNT_dec(sv);
1946
1947 SPAGAIN;
1948 sv = POPs;
1949 PUTBACK;
1950
2d8e6c8d
GS		 1951 if (croak_on_error && SvTRUE(ERRSV)) {
1952 STRLEN n_a;
cea2e8a9 1953 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 1954 }
137443ea 1955
1956 return sv;
1957}
1958
4633a7c4
LW		 1959/* Require a module. */
1960
954c1994
GS		 1961/*
1962=for apidoc p||require_pv
1963
1964Tells Perl to C<require> a module.
1965
1966=cut
1967*/
1968
4633a7c4 1969void
864dbfa3 1970Perl_require_pv(pTHX_ const char *pv)
4633a7c4 1971{
d3acc0f7
JP		 1972 SV* sv;
1973 dSP;
e788e7d3 1974 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP		 1975 PUTBACK;
1976 sv = sv_newmortal();
4633a7c4
LW		 1977 sv_setpv(sv, "require '");
1978 sv_catpv(sv, pv);
1979 sv_catpv(sv, "'");
864dbfa3 1980 eval_sv(sv, G_DISCARD);
d3acc0f7
JP		 1981 SPAGAIN;
1982 POPSTACK;
79072805
LW		 1983}
1984
79072805 1985void
864dbfa3 1986Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW		 1987{
1988 register GV *gv;
1989
155aba94 1990 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
79072805
LW		 1991 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1992}
1993
76e3520e 1994STATIC void
cea2e8a9 1995S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 1996{
ab821d7f 1997 /* This message really ought to be max 23 lines.
1998 * Removed -h because the user already knows that opton. Others? */
fb73857a 1999
76e3520e 2000 static char *usage_msg[] = {
fb73857a 2001"-0[octal] specify record separator (\\0, if no argument)",
2002"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2003"-C enable native wide character system interfaces",
1950ee41 2004"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS		 2005"-d[:debugger] run program under debugger",
2006"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2007"-e 'command' one line of program (several -e's allowed, omit programfile)",
2008"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2009"-i[extension] edit <> files in place (makes backup if extension supplied)",
2010"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2011"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS		 2012"-[mM][-]module execute `use/no module...' before executing program",
2013"-n assume 'while (<>) { ... }' loop around program",
2014"-p assume loop like -n but print line also, like sed",
2015"-P run program through C preprocessor before compilation",
2016"-s enable rudimentary parsing for switches after programfile",
2017"-S look for programfile using PATH environment variable",
2018"-T enable tainting checks",
2019"-u dump core after parsing program",
fb73857a 2020"-U allow unsafe operations",
aac3bd0d
GS		 2021"-v print version, subversion (includes VERY IMPORTANT perl info)",
2022"-V[:variable] print configuration summary (or a single Config.pm variable)",
2023"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS		 2024"-W enable all warnings",
2025"-X disable all warnings",
fb73857a 2026"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2027"\n",
2028NULL
2029};
76e3520e 2030 char **p = usage_msg;
fb73857a 2031
b0e47665
GS		 2032 PerlIO_printf(PerlIO_stdout(),
2033 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2034 name);
fb73857a 2035 while (*p)
b0e47665 2036 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW		 2037}
2038
79072805
LW		 2039/* This routine handles any switches that can be given during run */
2040
2041char *
864dbfa3 2042Perl_moreswitches(pTHX_ char *s)
79072805 2043{
ba210ebe 2044 STRLEN numlen;
c07a80fd 2045 U32 rschar;
79072805
LW		 2046
2047 switch (*s) {
2048 case '0':
a863c7d1 2049 {
b21ed0a9 2050 numlen = 0; /* disallow underscores */
dff6d3cd 2051 rschar = (U32)scan_oct(s, 4, &numlen);
3280af22 2052 SvREFCNT_dec(PL_nrs);
c07a80fd 2053 if (rschar & ~((U8)~0))
3280af22 2054 PL_nrs = &PL_sv_undef;
c07a80fd 2055 else if (!rschar && numlen >= 2)
79cb57f6 2056 PL_nrs = newSVpvn("", 0);
c07a80fd 2057 else {
2058 char ch = rschar;
79cb57f6 2059 PL_nrs = newSVpvn(&ch, 1);
79072805
LW		 2060 }
2061 return s + numlen;
a863c7d1 2062 }
46487f74
GS		 2063 case 'C':
2064 PL_widesyscalls = TRUE;
2065 s++;
2066 return s;
2304df62 2067 case 'F':
3280af22
NIS		 2068 PL_minus_F = TRUE;
2069 PL_splitstr = savepv(s + 1);
2304df62
AD		 2070 s += strlen(s);
2071 return s;
79072805 2072 case 'a':
3280af22 2073 PL_minus_a = TRUE;
79072805
LW		 2074 s++;
2075 return s;
2076 case 'c':
3280af22 2077 PL_minus_c = TRUE;
79072805
LW		 2078 s++;
2079 return s;
2080 case 'd':
bbce6d69 2081 forbid_setid("-d");
4633a7c4 2082 s++;
70c94a19
RR		 2083 /* The following permits -d:Mod to accepts arguments following an =
2084 in the fashion that -MSome::Mod does. */
2085 if (*s == ':' || *s == '=') {
2086 char *start;
2087 SV *sv;
2088 sv = newSVpv("use Devel::", 0);
2089 start = ++s;
2090 /* We now allow -d:Module=Foo,Bar */
2091 while(isALNUM(*s) || *s==':') ++s;
2092 if (*s != '=')
2093 sv_catpv(sv, start);
2094 else {
2095 sv_catpvn(sv, start, s-start);
2096 sv_catpv(sv, " split(/,/,q{");
2097 sv_catpv(sv, ++s);
2098 sv_catpv(sv, "})");
2099 }
4633a7c4 2100 s += strlen(s);
70c94a19 2101 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2102 }
ed094faf 2103 if (!PL_perldb) {
3280af22 2104 PL_perldb = PERLDB_ALL;
a0d0e21e 2105 init_debugger();
ed094faf 2106 }
79072805
LW		 2107 return s;
2108 case 'D':
0453d815 2109 {
79072805 2110#ifdef DEBUGGING
bbce6d69 2111 forbid_setid("-D");
79072805 2112 if (isALPHA(s[1])) {
607df283 2113 static char debopts[] = "psltocPmfrxuLHXDST";
79072805
LW		 2114 char *d;
2115
93a17b20 2116 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2117 PL_debug |= 1 << (d - debopts);
79072805
LW		 2118 }
2119 else {
3280af22 2120 PL_debug = atoi(s+1);
79072805
LW		 2121 for (s++; isDIGIT(*s); s++) ;
2122 }
3280af22 2123 PL_debug |= 0x80000000;
79072805 2124#else
0453d815
PM		 2125 if (ckWARN_d(WARN_DEBUGGING))
2126 Perl_warner(aTHX_ WARN_DEBUGGING,
2127 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2128 for (s++; isALNUM(*s); s++) ;
79072805
LW		 2129#endif
2130 /*SUPPRESS 530*/
2131 return s;
0453d815 2132 }
4633a7c4 2133 case 'h':
ac27b0f5 2134 usage(PL_origargv[0]);
6ad3d225 2135 PerlProc_exit(0);
79072805 2136 case 'i':
3280af22
NIS		 2137 if (PL_inplace)
2138 Safefree(PL_inplace);
2139 PL_inplace = savepv(s+1);
79072805 2140 /*SUPPRESS 530*/
3280af22 2141 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2142 if (*s) {
fb73857a 2143 *s++ = '\0';
7b8d334a
GS		 2144 if (*s == '-') /* Additional switches on #! line. */
2145 s++;
2146 }
fb73857a 2147 return s;
2148 case 'I': /* -I handled both here and in parse_perl() */
bbce6d69 2149 forbid_setid("-I");
fb73857a 2150 ++s;
2151 while (*s && isSPACE(*s))
2152 ++s;
2153 if (*s) {
774d564b 2154 char *e, *p;
0df16ed7
GS		 2155 p = s;
2156 /* ignore trailing spaces (possibly followed by other switches) */
2157 do {
2158 for (e = p; *e && !isSPACE(*e); e++) ;
2159 p = e;
2160 while (isSPACE(*p))
2161 p++;
2162 } while (*p && *p != '-');
2163 e = savepvn(s, e-s);
9c8a64f0 2164 incpush(e, TRUE, TRUE);
0df16ed7
GS		 2165 Safefree(e);
2166 s = p;
2167 if (*s == '-')
2168 s++;
79072805
LW		 2169 }
2170 else
a67e862a 2171 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2172 return s;
79072805 2173 case 'l':
3280af22 2174 PL_minus_l = TRUE;
79072805 2175 s++;
7889fe52
NIS		 2176 if (PL_ors_sv) {
2177 SvREFCNT_dec(PL_ors_sv);
2178 PL_ors_sv = Nullsv;
2179 }
79072805 2180 if (isDIGIT(*s)) {
7889fe52 2181 PL_ors_sv = newSVpvn("\n",1);
b21ed0a9 2182 numlen = 0; /* disallow underscores */
7889fe52 2183 *SvPVX(PL_ors_sv) = (char)scan_oct(s, 3 + (*s == '0'), &numlen);
79072805
LW		 2184 s += numlen;
2185 }
2186 else {
3280af22 2187 if (RsPARA(PL_nrs)) {
7889fe52
NIS		 2188 PL_ors_sv = newSVpvn("\n\n",2);
2189 }
2190 else {
2191 PL_ors_sv = newSVsv(PL_nrs);
c07a80fd 2192 }
79072805
LW		 2193 }
2194 return s;
1a30305b 2195 case 'M':
bbce6d69 2196 forbid_setid("-M"); /* XXX ? */
1a30305b 2197 /* FALL THROUGH */
2198 case 'm':
bbce6d69 2199 forbid_setid("-m"); /* XXX ? */
1a30305b 2200 if (*++s) {
a5f75d66 2201 char *start;
11343788 2202 SV *sv;
a5f75d66
AD		 2203 char *use = "use ";
2204 /* -M-foo == 'no foo' */
2205 if (*s == '-') { use = "no "; ++s; }
11343788 2206 sv = newSVpv(use,0);
a5f75d66 2207 start = s;
1a30305b 2208 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd 2209 while(isALNUM(*s) || *s==':') ++s;
2210 if (*s != '=') {
11343788 2211 sv_catpv(sv, start);
c07a80fd 2212 if (*(start-1) == 'm') {
2213 if (*s != '\0')
cea2e8a9 2214 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2215 sv_catpv( sv, " ()");
c07a80fd 2216 }
2217 } else {
6df41af2 2218 if (s == start)
be98fb35
GS		 2219 Perl_croak(aTHX_ "Module name required with -%c option",
2220 s[-1]);
11343788
MB		 2221 sv_catpvn(sv, start, s-start);
2222 sv_catpv(sv, " split(/,/,q{");
2223 sv_catpv(sv, ++s);
2224 sv_catpv(sv, "})");
c07a80fd 2225 }
1a30305b 2226 s += strlen(s);
5c831c24 2227 if (!PL_preambleav)
3280af22
NIS		 2228 PL_preambleav = newAV();
2229 av_push(PL_preambleav, sv);
1a30305b 2230 }
2231 else
cea2e8a9 2232 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2233 return s;
79072805 2234 case 'n':
3280af22 2235 PL_minus_n = TRUE;
79072805
LW		 2236 s++;
2237 return s;
2238 case 'p':
3280af22 2239 PL_minus_p = TRUE;
79072805
LW		 2240 s++;
2241 return s;
2242 case 's':
bbce6d69 2243 forbid_setid("-s");
3280af22 2244 PL_doswitches = TRUE;
79072805
LW		 2245 s++;
2246 return s;
463ee0b2 2247 case 'T':
3280af22 2248 if (!PL_tainting)
cea2e8a9 2249 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW		 2250 s++;
2251 return s;
79072805 2252 case 'u':
bf4acbe4
GS		 2253#ifdef MACOS_TRADITIONAL
2254 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2255#endif
3280af22 2256 PL_do_undump = TRUE;
79072805
LW		 2257 s++;
2258 return s;
2259 case 'U':
3280af22 2260 PL_unsafe = TRUE;
79072805
LW		 2261 s++;
2262 return s;
2263 case 'v':
b0e47665 2264 PerlIO_printf(PerlIO_stdout(),
d2560b70 2265 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2266 PL_patchlevel, ARCHNAME));
fb73857a 2267#if defined(LOCAL_PATCH_COUNT)
2268 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS		 2269 PerlIO_printf(PerlIO_stdout(),
2270 "\n(with %d registered patch%s, "
2271 "see perl -V for more detail)",
2272 (int)LOCAL_PATCH_COUNT,
2273 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2274#endif
1a30305b 2275
b0e47665 2276 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2277 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH		 2278#ifdef MACOS_TRADITIONAL
2279 PerlIO_printf(PerlIO_stdout(),
084592ab 2280 "\nMac OS port Copyright (c) 1991-2001, Matthias Neeracher\n");
eae9c151 2281#endif
79072805 2282#ifdef MSDOS
b0e47665
GS		 2283 PerlIO_printf(PerlIO_stdout(),
2284 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff 2285#endif
2286#ifdef DJGPP
b0e47665
GS		 2287 PerlIO_printf(PerlIO_stdout(),
2288 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2289 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2290#endif
79072805 2291#ifdef OS2
b0e47665
GS		 2292 PerlIO_printf(PerlIO_stdout(),
2293 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2294 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2295#endif
79072805 2296#ifdef atarist
b0e47665
GS		 2297 PerlIO_printf(PerlIO_stdout(),
2298 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2299#endif
a3f9223b 2300#ifdef __BEOS__
b0e47665
GS		 2301 PerlIO_printf(PerlIO_stdout(),
2302 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2303#endif
1d84e8df 2304#ifdef MPE
b0e47665
GS		 2305 PerlIO_printf(PerlIO_stdout(),
2306 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-1999\n");
1d84e8df 2307#endif
9d116dd7 2308#ifdef OEMVS
b0e47665
GS		 2309 PerlIO_printf(PerlIO_stdout(),
2310 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2311#endif
495c5fdc 2312#ifdef __VOS__
b0e47665
GS		 2313 PerlIO_printf(PerlIO_stdout(),
2314 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2315#endif
092bebab 2316#ifdef __OPEN_VM
b0e47665
GS		 2317 PerlIO_printf(PerlIO_stdout(),
2318 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2319#endif
a1a0e61e 2320#ifdef POSIX_BC
b0e47665
GS		 2321 PerlIO_printf(PerlIO_stdout(),
2322 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2323#endif
61ae2fbf 2324#ifdef __MINT__
b0e47665
GS		 2325 PerlIO_printf(PerlIO_stdout(),
2326 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2327#endif
f83d2536 2328#ifdef EPOC
b0e47665
GS		 2329 PerlIO_printf(PerlIO_stdout(),
2330 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2331#endif
baed7233
DL		 2332#ifdef BINARY_BUILD_NOTICE
2333 BINARY_BUILD_NOTICE;
2334#endif
b0e47665
GS		 2335 PerlIO_printf(PerlIO_stdout(),
2336 "\n\
79072805 2337Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2338GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS		 2339Complete documentation for Perl, including FAQ lists, should be found on\n\
2340this system using `man perl' or `perldoc perl'. If you have access to the\n\
2341Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2342 PerlProc_exit(0);
79072805 2343 case 'w':
599cee73 2344 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2345 PL_dowarn |= G_WARN_ON;
599cee73
PM		 2346 s++;
2347 return s;
2348 case 'W':
ac27b0f5 2349 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
d3a7d8c7 2350 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM		 2351 s++;
2352 return s;
2353 case 'X':
ac27b0f5 2354 PL_dowarn = G_WARN_ALL_OFF;
d3a7d8c7 2355 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW		 2356 s++;
2357 return s;
a0d0e21e 2358 case '*':
79072805
LW		 2359 case ' ':
2360 if (s[1] == '-') /* Additional switches on #! line. */
2361 return s+2;
2362 break;
a0d0e21e 2363 case '-':
79072805 2364 case 0:
51882d45 2365#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS		 2366 case '\r':
2367#endif
79072805
LW		 2368 case '\n':
2369 case '\t':
2370 break;
aa689395 2371#ifdef ALTERNATE_SHEBANG
2372 case 'S': /* OS/2 needs -S on "extproc" line. */
2373 break;
2374#endif
a0d0e21e 2375 case 'P':
3280af22 2376 if (PL_preprocess)
a0d0e21e
LW		 2377 return s+1;
2378 /* FALL THROUGH */
79072805 2379 default:
cea2e8a9 2380 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW		 2381 }
2382 return Nullch;
2383}
2384
2385/* compliments of Tom Christiansen */
2386
2387/* unexec() can be found in the Gnu emacs distribution */
ee580363 2388/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW		 2389
2390void
864dbfa3 2391Perl_my_unexec(pTHX)
79072805
LW		 2392{
2393#ifdef UNEXEC
46fc3d4c 2394 SV* prog;
2395 SV* file;
ee580363 2396 int status = 1;
79072805
LW		 2397 extern int etext;
2398
ee580363 2399 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2400 sv_catpv(prog, "/perl");
6b88bc9c 2401 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2402 sv_catpv(file, ".perldump");
79072805 2403
ee580363
GS		 2404 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2405 /* unexec prints msg to stderr in case of failure */
6ad3d225 2406 PerlProc_exit(status);
79072805 2407#else
a5f75d66
AD		 2408# ifdef VMS
2409# include <lib$routines.h>
2410 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2411# else
79072805 2412 ABORT(); /* for use with undump */
aa689395 2413# endif
a5f75d66 2414#endif
79072805
LW		 2415}
2416
cb68f92d
GS		 2417/* initialize curinterp */
2418STATIC void
cea2e8a9 2419S_init_interp(pTHX)
cb68f92d
GS		 2420{
2421
066ef5b5 2422#ifdef PERL_OBJECT /* XXX kludge */
cb68f92d 2423#define I_REINIT \
6b88bc9c
GS		 2424 STMT_START { \
2425 PL_chopset = " \n-"; \
2426 PL_copline = NOLINE; \
2427 PL_curcop = &PL_compiling;\
2428 PL_curcopdb = NULL; \
2429 PL_dbargs = 0; \
3967c732 2430 PL_dumpindent = 4; \
6b88bc9c
GS		 2431 PL_laststatval = -1; \
2432 PL_laststype = OP_STAT; \
2433 PL_maxscream = -1; \
2434 PL_maxsysfd = MAXSYSFD; \
2435 PL_statname = Nullsv; \
2436 PL_tmps_floor = -1; \
2437 PL_tmps_ix = -1; \
2438 PL_op_mask = NULL; \
6b88bc9c
GS		 2439 PL_laststatval = -1; \
2440 PL_laststype = OP_STAT; \
2441 PL_mess_sv = Nullsv; \
2442 PL_splitstr = " "; \
2443 PL_generation = 100; \
2444 PL_exitlist = NULL; \
2445 PL_exitlistlen = 0; \
2446 PL_regindent = 0; \
2447 PL_in_clean_objs = FALSE; \
2448 PL_in_clean_all = FALSE; \
2449 PL_profiledata = NULL; \
2450 PL_rsfp = Nullfp; \
2451 PL_rsfp_filters = Nullav; \
24d3c518 2452 PL_dirty = FALSE; \
cb68f92d 2453 } STMT_END
9666903d 2454 I_REINIT;
066ef5b5
GS		 2455#else
2456# ifdef MULTIPLICITY
2457# define PERLVAR(var,type)
51371543 2458# define PERLVARA(var,n,type)
cea2e8a9 2459# if defined(PERL_IMPLICIT_CONTEXT)
54aff467
GS		 2460# if defined(USE_THREADS)
2461# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2462# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
2463# else /* !USE_THREADS */
2464# define PERLVARI(var,type,init) aTHX->var = init;
2465# define PERLVARIC(var,type,init) aTHX->var = init;
2466# endif /* USE_THREADS */
cea2e8a9 2467# else
c5be433b
GS		 2468# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2469# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
cea2e8a9 2470# endif
066ef5b5
GS		 2471# include "intrpvar.h"
2472# ifndef USE_THREADS
2473# include "thrdvar.h"
2474# endif
2475# undef PERLVAR
51371543 2476# undef PERLVARA
066ef5b5
GS		 2477# undef PERLVARI
2478# undef PERLVARIC
3967c732 2479# else
066ef5b5 2480# define PERLVAR(var,type)
51371543 2481# define PERLVARA(var,n,type)
533c011a
NIS		 2482# define PERLVARI(var,type,init) PL_##var = init;
2483# define PERLVARIC(var,type,init) PL_##var = init;
066ef5b5
GS		 2484# include "intrpvar.h"
2485# ifndef USE_THREADS
2486# include "thrdvar.h"
2487# endif
2488# undef PERLVAR
51371543 2489# undef PERLVARA
066ef5b5
GS		 2490# undef PERLVARI
2491# undef PERLVARIC
2492# endif
cb68f92d
GS		 2493#endif
2494
cb68f92d
GS		 2495}
2496
76e3520e 2497STATIC void
cea2e8a9 2498S_init_main_stash(pTHX)
79072805 2499{
463ee0b2 2500 GV *gv;
6e72f9df 2501
2502 /* Note that strtab is a rather special HV. Assumptions are made
2503 about not iterating on it, and not adding tie magic to it.
2504 It is properly deallocated in perl_destruct() */
3280af22 2505 PL_strtab = newHV();
5f08fbcd
GS		 2506#ifdef USE_THREADS
2507 MUTEX_INIT(&PL_strtab_mutex);
2508#endif
3280af22
NIS		 2509 HvSHAREKEYS_off(PL_strtab); /* mandatory */
2510 hv_ksplit(PL_strtab, 512);
ac27b0f5 2511
3280af22 2512 PL_curstash = PL_defstash = newHV();
79cb57f6 2513 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW		 2514 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2515 SvREFCNT_dec(GvHV(gv));
3280af22 2516 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2517 SvREADONLY_on(gv);
3280af22
NIS		 2518 HvNAME(PL_defstash) = savepv("main");
2519 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2520 GvMULTI_on(PL_incgv);
2521 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2522 GvMULTI_on(PL_hintgv);
2523 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2524 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2525 GvMULTI_on(PL_errgv);
2526 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2527 GvMULTI_on(PL_replgv);
cea2e8a9 2528 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB		 2529 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2530 sv_setpvn(ERRSV, "", 0);
3280af22 2531 PL_curstash = PL_defstash;
11faa288 2532 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2533 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2534 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2535 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2536 /* We must init $/ before switches are processed. */
864dbfa3 2537 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW		 2538}
2539
76e3520e 2540STATIC void
cea2e8a9 2541S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2542{
6c4ab083 2543 *fdscript = -1;
79072805 2544
3280af22
NIS		 2545 if (PL_e_script) {
2546 PL_origfilename = savepv("-e");
96436eeb 2547 }
6c4ab083
GS		 2548 else {
2549 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2550 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS		 2551
2552 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2553 char *s = scriptname + 8;
2554 *fdscript = atoi(s);
2555 while (isDIGIT(*s))
2556 s++;
2557 if (*s) {
2558 scriptname = savepv(s + 1);
3280af22
NIS		 2559 Safefree(PL_origfilename);
2560 PL_origfilename = scriptname;
6c4ab083
GS		 2561 }
2562 }
2563 }
2564
f4dd75d9
GS		 2565#ifdef USE_ITHREADS
2566 Safefree(CopFILE(PL_curcop));
2567#else
2568 SvREFCNT_dec(CopFILEGV(PL_curcop));
2569#endif
57843af0 2570 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2571 if (strEQ(PL_origfilename,"-"))
79072805 2572 scriptname = "";
01f988be 2573 if (*fdscript >= 0) {
3280af22 2574 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
96436eeb 2575#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS		 2576 if (PL_rsfp)
2577 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb 2578#endif
2579 }
3280af22 2580 else if (PL_preprocess) {
46fc3d4c 2581 char *cpp_cfg = CPPSTDIN;
79cb57f6 2582 SV *cpp = newSVpvn("",0);
46fc3d4c 2583 SV *cmd = NEWSV(0,0);
2584
2585 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2586 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2587 sv_catpv(cpp, cpp_cfg);
79072805 2588
0df16ed7 2589 sv_catpvn(sv, "-I", 2);
fed7345c 2590 sv_catpv(sv,PRIVLIB_EXP);
46fc3d4c 2591
52853b95 2592#if defined(MSDOS) || defined(WIN32)
cea2e8a9 2593 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW		 2594sed %s -e \"/^[^#]/b\" \
2595 -e \"/^#[ ]*include[ ]/b\" \
2596 -e \"/^#[ ]*define[ ]/b\" \
2597 -e \"/^#[ ]*if[ ]/b\" \
2598 -e \"/^#[ ]*ifdef[ ]/b\" \
2599 -e \"/^#[ ]*ifndef[ ]/b\" \
2600 -e \"/^#[ ]*else/b\" \
2601 -e \"/^#[ ]*elif[ ]/b\" \
2602 -e \"/^#[ ]*undef[ ]/b\" \
2603 -e \"/^#[ ]*endif/b\" \
2604 -e \"s/^#.*//\" \
894356b3 2605 %s | %"SVf" -C %"SVf" %s",
6b88bc9c 2606 (PL_doextract ? "-e \"1,/^#/d\n\"" : ""),
79072805 2607#else
092bebab 2608# ifdef __OPEN_VM
cea2e8a9 2609 Perl_sv_setpvf(aTHX_ cmd, "\
092bebab
JH		 2610%s %s -e '/^[^#]/b' \
2611 -e '/^#[ ]*include[ ]/b' \
2612 -e '/^#[ ]*define[ ]/b' \
2613 -e '/^#[ ]*if[ ]/b' \
2614 -e '/^#[ ]*ifdef[ ]/b' \
2615 -e '/^#[ ]*ifndef[ ]/b' \
2616 -e '/^#[ ]*else/b' \
2617 -e '/^#[ ]*elif[ ]/b' \
2618 -e '/^#[ ]*undef[ ]/b' \
2619 -e '/^#[ ]*endif/b' \
2620 -e 's/^[ ]*#.*//' \
894356b3 2621 %s | %"SVf" %"SVf" %s",
092bebab 2622# else
cea2e8a9 2623 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW		 2624%s %s -e '/^[^#]/b' \
2625 -e '/^#[ ]*include[ ]/b' \
2626 -e '/^#[ ]*define[ ]/b' \
2627 -e '/^#[ ]*if[ ]/b' \
2628 -e '/^#[ ]*ifdef[ ]/b' \
2629 -e '/^#[ ]*ifndef[ ]/b' \
2630 -e '/^#[ ]*else/b' \
2631 -e '/^#[ ]*elif[ ]/b' \
2632 -e '/^#[ ]*undef[ ]/b' \
2633 -e '/^#[ ]*endif/b' \
2634 -e 's/^[ ]*#.*//' \
894356b3 2635 %s | %"SVf" -C %"SVf" %s",
092bebab 2636# endif
79072805
LW		 2637#ifdef LOC_SED
2638 LOC_SED,
2639#else
2640 "sed",
2641#endif
3280af22 2642 (PL_doextract ? "-e '1,/^#/d\n'" : ""),
79072805 2643#endif
46fc3d4c 2644 scriptname, cpp, sv, CPPMINUS);
3280af22 2645 PL_doextract = FALSE;
79072805 2646#ifdef IAMSUID /* actually, this is caught earlier */
b28d0864 2647 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
79072805 2648#ifdef HAS_SETEUID
b28d0864 2649 (void)seteuid(PL_uid); /* musn't stay setuid root */
79072805
LW		 2650#else
2651#ifdef HAS_SETREUID
b28d0864 2652 (void)setreuid((Uid_t)-1, PL_uid);
85e6fe83
LW		 2653#else
2654#ifdef HAS_SETRESUID
b28d0864 2655 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
79072805 2656#else
b28d0864 2657 PerlProc_setuid(PL_uid);
79072805
LW		 2658#endif
2659#endif
85e6fe83 2660#endif
b28d0864 2661 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2662 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805
LW		 2663 }
2664#endif /* IAMSUID */
3280af22 2665 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c 2666 SvREFCNT_dec(cmd);
2667 SvREFCNT_dec(cpp);
79072805
LW		 2668 }
2669 else if (!*scriptname) {
bbce6d69 2670 forbid_setid("program input from stdin");
3280af22 2671 PL_rsfp = PerlIO_stdin();
79072805 2672 }
96436eeb 2673 else {
3280af22 2674 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
96436eeb 2675#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS		 2676 if (PL_rsfp)
2677 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb 2678#endif
2679 }
3280af22 2680 if (!PL_rsfp) {
13281fa4 2681#ifdef DOSUID
a687059c 2682#ifndef IAMSUID /* in case script is not readable before setuid */
6b88bc9c 2683 if (PL_euid &&
cc49e20b 2684 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
6b88bc9c
GS		 2685 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2686 {
46fc3d4c 2687 /* try again */
a7cb1f99 2688 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 2689 (int)PERL_REVISION, (int)PERL_VERSION,
2690 (int)PERL_SUBVERSION), PL_origargv);
cea2e8a9 2691 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 2692 }
2693#endif
2694#endif
cea2e8a9 2695 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
cc49e20b 2696 CopFILE(PL_curcop), Strerror(errno));
13281fa4 2697 }
79072805 2698}
8d063cd8 2699
7b89560d
JH		 2700/* Mention
2701 * I_SYSSTATVFS HAS_FSTATVFS
2702 * I_SYSMOUNT
c890dc6c 2703 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH		 2704 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2705 * here so that metaconfig picks them up. */
2706
104d25b7 2707#ifdef IAMSUID
864dbfa3 2708STATIC int
e688b231 2709S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2710{
0545a864
JH		 2711 int check_okay = 0; /* able to do all the required sys/libcalls */
2712 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2713/*
ad27e871 2714 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2715 * fstatvfs() is UNIX98.
0545a864 2716 * fstatfs() is 4.3 BSD.
ad27e871 2717 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH		 2718 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2719 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH		 2720 */
2721
6439433f
JH		 2722#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2723
2724# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2725 defined(HAS_FSTATVFS)
2726# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2727 struct statvfs stfs;
6439433f 2728
104d25b7
JH		 2729 check_okay = fstatvfs(fd, &stfs) == 0;
2730 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2731# endif /* fstatvfs */
ac27b0f5 2732
6439433f
JH		 2733# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2734 defined(PERL_MOUNT_NOSUID) && \
2735 defined(HAS_FSTATFS) && \
2736 defined(HAS_STRUCT_STATFS) && \
2737 defined(HAS_STRUCT_STATFS_F_FLAGS)
2738# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2739 struct statfs stfs;
6439433f 2740
104d25b7 2741 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2742 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH		 2743# endif /* fstatfs */
2744
2745# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2746 defined(PERL_MOUNT_NOSUID) && \
2747 defined(HAS_FSTAT) && \
2748 defined(HAS_USTAT) && \
2749 defined(HAS_GETMNT) && \
2750 defined(HAS_STRUCT_FS_DATA) && \
2751 defined(NOSTAT_ONE)
2752# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2753 struct stat fdst;
6439433f 2754
0545a864 2755 if (fstat(fd, &fdst) == 0) {
6439433f
JH		 2756 struct ustat us;
2757 if (ustat(fdst.st_dev, &us) == 0) {
2758 struct fs_data fsd;
2759 /* NOSTAT_ONE here because we're not examining fields which
2760 * vary between that case and STAT_ONE. */
ad27e871 2761 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH		 2762 size_t cmplen = sizeof(us.f_fname);
2763 if (sizeof(fsd.fd_req.path) < cmplen)
2764 cmplen = sizeof(fsd.fd_req.path);
2765 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2766 fdst.st_dev == fsd.fd_req.dev) {
2767 check_okay = 1;
2768 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2769 }
2770 }
2771 }
2772 }
0545a864 2773 }
6439433f
JH		 2774# endif /* fstat+ustat+getmnt */
2775
2776# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2777 defined(HAS_GETMNTENT) && \
2778 defined(HAS_HASMNTOPT) && \
2779 defined(MNTOPT_NOSUID)
2780# define FD_ON_NOSUID_CHECK_OKAY
2781 FILE *mtab = fopen("/etc/mtab", "r");
2782 struct mntent *entry;
2783 struct stat stb, fsb;
104d25b7
JH		 2784
2785 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH		 2786 while (entry = getmntent(mtab)) {
2787 if (stat(entry->mnt_dir, &fsb) == 0
2788 && fsb.st_dev == stb.st_dev)
2789 {
2790 /* found the filesystem */
2791 check_okay = 1;
2792 if (hasmntopt(entry, MNTOPT_NOSUID))
2793 on_nosuid = 1;
2794 break;
2795 } /* A single fs may well fail its stat(). */
2796 }
104d25b7
JH		 2797 }
2798 if (mtab)
6439433f
JH		 2799 fclose(mtab);
2800# endif /* getmntent+hasmntopt */
0545a864 2801
ac27b0f5 2802 if (!check_okay)
0545a864 2803 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH		 2804 return on_nosuid;
2805}
2806#endif /* IAMSUID */
2807
76e3520e 2808STATIC void
cea2e8a9 2809S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2810{
155aba94 2811#ifdef IAMSUID
96436eeb 2812 int which;
155aba94 2813#endif
96436eeb 2814
13281fa4
LW		 2815 /* do we need to emulate setuid on scripts? */
2816
2817 /* This code is for those BSD systems that have setuid #! scripts disabled
2818 * in the kernel because of a security problem. Merely defining DOSUID
2819 * in perl will not fix that problem, but if you have disabled setuid
2820 * scripts in the kernel, this will attempt to emulate setuid and setgid
2821 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW		 2822 * root version must be called suidperl or sperlN.NNN. If regular perl
2823 * discovers that it has opened a setuid script, it calls suidperl with
2824 * the same argv that it had. If suidperl finds that the script it has
2825 * just opened is NOT setuid root, it sets the effective uid back to the
2826 * uid. We don't just make perl setuid root because that loses the
2827 * effective uid we had before invoking perl, if it was different from the
2828 * uid.
13281fa4
LW		 2829 *
2830 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2831 * be defined in suidperl only. suidperl must be setuid root. The
2832 * Configure script will set this up for you if you want it.
2833 */
a687059c 2834
13281fa4 2835#ifdef DOSUID
6e72f9df 2836 char *s, *s2;
a0d0e21e 2837
b28d0864 2838 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2839 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2840 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2841 I32 len;
2d8e6c8d 2842 STRLEN n_a;
13281fa4 2843
a687059c 2844#ifdef IAMSUID
fe14fcc3 2845#ifndef HAS_SETREUID
a687059c
LW		 2846 /* On this access check to make sure the directories are readable,
2847 * there is actually a small window that the user could use to make
2848 * filename point to an accessible directory. So there is a faint
2849 * chance that someone could execute a setuid script down in a
2850 * non-accessible directory. I don't know what to do about that.
2851 * But I don't think it's too important. The manual lies when
2852 * it says access() is useful in setuid programs.
2853 */
cc49e20b 2854 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2855 Perl_croak(aTHX_ "Permission denied");
a687059c
LW		 2856#else
2857 /* If we can swap euid and uid, then we can determine access rights
2858 * with a simple stat of the file, and then compare device and
2859 * inode to make sure we did stat() on the same file we opened.
2860 * Then we just have to make sure he or she can execute it.
2861 */
2862 {
2863 struct stat tmpstatbuf;
2864
85e6fe83
LW		 2865 if (
2866#ifdef HAS_SETREUID
b28d0864 2867 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW		 2868#else
2869# if HAS_SETRESUID
b28d0864 2870 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 2871# endif
85e6fe83 2872#endif
b28d0864 2873 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 2874 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 2875 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 2876 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 2877#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 2878 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 2879 Perl_croak(aTHX_ "Permission denied");
104d25b7 2880#endif
b28d0864
NIS		 2881 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
2882 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
2883 (void)PerlIO_close(PL_rsfp);
cea2e8a9 2884 Perl_croak(aTHX_ "Permission denied\n");
a687059c 2885 }
85e6fe83
LW		 2886 if (
2887#ifdef HAS_SETREUID
b28d0864 2888 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW		 2889#else
2890# if defined(HAS_SETRESUID)
b28d0864 2891 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 2892# endif
85e6fe83 2893#endif
b28d0864 2894 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 2895 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 2896 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 2897 Perl_croak(aTHX_ "Permission denied\n");
a687059c 2898 }
fe14fcc3 2899#endif /* HAS_SETREUID */
a687059c
LW		 2900#endif /* IAMSUID */
2901
b28d0864 2902 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 2903 Perl_croak(aTHX_ "Permission denied");
b28d0864 2904 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 2905 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 2906 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 2907 CopLINE_inc(PL_curcop);
6b88bc9c 2908 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 2909 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 2910 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 2911 s = SvPV(PL_linestr,n_a)+2;
663a0e37 2912 if (*s == ' ') s++;
45d8adaa 2913 while (!isSPACE(*s)) s++;
2d8e6c8d 2914 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df 2915 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2916 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 2917 Perl_croak(aTHX_ "Not a perl script");
a687059c 2918 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW		 2919 /*
2920 * #! arg must be what we saw above. They can invoke it by
2921 * mentioning suidperl explicitly, but they may not add any strange
2922 * arguments beyond what #! says if they do invoke suidperl that way.
2923 */
2924 len = strlen(validarg);
2925 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 2926 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 2927 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW		 2928
2929#ifndef IAMSUID
b28d0864
NIS		 2930 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
2931 PL_euid == PL_statbuf.st_uid)
2932 if (!PL_do_undump)
cea2e8a9 2933 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 2934FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2935#endif /* IAMSUID */
13281fa4 2936
b28d0864
NIS		 2937 if (PL_euid) { /* oops, we're not the setuid root perl */
2938 (void)PerlIO_close(PL_rsfp);
13281fa4 2939#ifndef IAMSUID
46fc3d4c 2940 /* try again */
a7cb1f99 2941 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 2942 (int)PERL_REVISION, (int)PERL_VERSION,
2943 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 2944#endif
cea2e8a9 2945 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 2946 }
2947
b28d0864 2948 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 2949#ifdef HAS_SETEGID
b28d0864 2950 (void)setegid(PL_statbuf.st_gid);
a687059c 2951#else
fe14fcc3 2952#ifdef HAS_SETREGID
b28d0864 2953 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW		 2954#else
2955#ifdef HAS_SETRESGID
b28d0864 2956 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 2957#else
b28d0864 2958 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW		 2959#endif
2960#endif
85e6fe83 2961#endif
b28d0864 2962 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 2963 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 2964 }
b28d0864
NIS		 2965 if (PL_statbuf.st_mode & S_ISUID) {
2966 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 2967#ifdef HAS_SETEUID
b28d0864 2968 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 2969#else
fe14fcc3 2970#ifdef HAS_SETREUID
b28d0864 2971 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW		 2972#else
2973#ifdef HAS_SETRESUID
b28d0864 2974 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 2975#else
b28d0864 2976 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW		 2977#endif
2978#endif
85e6fe83 2979#endif
b28d0864 2980 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 2981 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 2982 }
b28d0864 2983 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 2984#ifdef HAS_SETEUID
b28d0864 2985 (void)seteuid((Uid_t)PL_uid);
a687059c 2986#else
fe14fcc3 2987#ifdef HAS_SETREUID
b28d0864 2988 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 2989#else
85e6fe83 2990#ifdef HAS_SETRESUID
b28d0864 2991 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 2992#else
b28d0864 2993 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 2994#endif
a687059c
LW		 2995#endif
2996#endif
b28d0864 2997 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2998 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 2999 }
748a9306 3000 init_ids();
b28d0864 3001 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3002 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW		 3003 }
3004#ifdef IAMSUID
6b88bc9c 3005 else if (PL_preprocess)
cea2e8a9 3006 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3007 else if (fdscript >= 0)
cea2e8a9 3008 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3009 else
cea2e8a9 3010 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb 3011
3012 /* We absolutely must clear out any saved ids here, so we */
3013 /* exec the real perl, substituting fd script for scriptname. */
3014 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS		 3015 PerlIO_rewind(PL_rsfp);
3016 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS		 3017 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3018 if (!PL_origargv[which])
cea2e8a9
GS		 3019 Perl_croak(aTHX_ "Permission denied");
3020 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3021 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3022#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3023 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3024#endif
a7cb1f99 3025 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3026 (int)PERL_REVISION, (int)PERL_VERSION,
3027 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3028 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3029#endif /* IAMSUID */
a687059c 3030#else /* !DOSUID */
3280af22 3031 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3032#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS		 3033 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3034 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3035 ||
b28d0864 3036 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3037 )
b28d0864 3038 if (!PL_do_undump)
cea2e8a9 3039 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3040FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3041#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3042 /* not set-id, must be wrapped */
a687059c 3043 }
13281fa4 3044#endif /* DOSUID */
79072805 3045}
13281fa4 3046
76e3520e 3047STATIC void
cea2e8a9 3048S_find_beginning(pTHX)
79072805 3049{
6e72f9df 3050 register char *s, *s2;
33b78306
LW		 3051
3052 /* skip forward in input to the real script? */
3053
bbce6d69 3054 forbid_setid("-x");
bf4acbe4 3055#ifdef MACOS_TRADITIONAL
084592ab 3056 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3057
bf4acbe4
GS		 3058 while (PL_doextract || gMacPerl_AlwaysExtract) {
3059 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3060 if (!gMacPerl_AlwaysExtract)
3061 Perl_croak(aTHX_ "No Perl script found in input\n");
3062
3063 if (PL_doextract) /* require explicit override ? */
3064 if (!OverrideExtract(PL_origfilename))
3065 Perl_croak(aTHX_ "User aborted script\n");
3066 else
3067 PL_doextract = FALSE;
3068
3069 /* Pater peccavi, file does not have #! */
3070 PerlIO_rewind(PL_rsfp);
ac27b0f5 3071
bf4acbe4
GS		 3072 break;
3073 }
3074#else
3280af22
NIS		 3075 while (PL_doextract) {
3076 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3077 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3078#endif
6e72f9df 3079 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
3280af22
NIS		 3080 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3081 PL_doextract = FALSE;
6e72f9df 3082 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3083 s2 = s;
3084 while (*s == ' ' || *s == '\t') s++;
3085 if (*s++ == '-') {
3086 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3087 if (strnEQ(s2-4,"perl",4))
3088 /*SUPPRESS 530*/
155aba94
GS		 3089 while ((s = moreswitches(s)))
3090 ;
33b78306 3091 }
83025b21
LW		 3092 }
3093 }
3094}
3095
afe37c7d 3096
76e3520e 3097STATIC void
cea2e8a9 3098S_init_ids(pTHX)
352d5a3a 3099{
d8eceb89
JH		 3100 PL_uid = PerlProc_getuid();
3101 PL_euid = PerlProc_geteuid();
3102 PL_gid = PerlProc_getgid();
3103 PL_egid = PerlProc_getegid();
748a9306 3104#ifdef VMS
b28d0864
NIS		 3105 PL_uid |= PL_gid << 16;
3106 PL_euid |= PL_egid << 16;
748a9306 3107#endif
3280af22 3108 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3109}
79072805 3110
76e3520e 3111STATIC void
cea2e8a9 3112S_forbid_setid(pTHX_ char *s)
bbce6d69 3113{
3280af22 3114 if (PL_euid != PL_uid)
cea2e8a9 3115 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3116 if (PL_egid != PL_gid)
cea2e8a9 3117 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69 3118}
3119
1ee4443e
IZ		 3120void
3121Perl_init_debugger(pTHX)
748a9306 3122{
1ee4443e
IZ		 3123 HV *ostash = PL_curstash;
3124
3280af22
NIS		 3125 PL_curstash = PL_debstash;
3126 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3127 AvREAL_off(PL_dbargs);
3128 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3129 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3130 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3131 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3132 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3133 sv_setiv(PL_DBsingle, 0);
3280af22 3134 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3135 sv_setiv(PL_DBtrace, 0);
3280af22 3136 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3137 sv_setiv(PL_DBsignal, 0);
1ee4443e 3138 PL_curstash = ostash;
352d5a3a
LW		 3139}
3140
2ce36478
SM		 3141#ifndef STRESS_REALLOC
3142#define REASONABLE(size) (size)
3143#else
3144#define REASONABLE(size) (1) /* unreasonable */
3145#endif
3146
11343788 3147void
cea2e8a9 3148Perl_init_stacks(pTHX)
79072805 3149{
e336de0d 3150 /* start with 128-item stack and 8K cxstack */
3280af22 3151 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3152 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS		 3153 PL_curstackinfo->si_type = PERLSI_MAIN;
3154 PL_curstack = PL_curstackinfo->si_stack;
3155 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3156
3280af22
NIS		 3157 PL_stack_base = AvARRAY(PL_curstack);
3158 PL_stack_sp = PL_stack_base;
3159 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3160
3280af22
NIS		 3161 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3162 PL_tmps_floor = -1;
3163 PL_tmps_ix = -1;
3164 PL_tmps_max = REASONABLE(128);
8990e307 3165
3280af22
NIS		 3166 New(54,PL_markstack,REASONABLE(32),I32);
3167 PL_markstack_ptr = PL_markstack;
3168 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3169
ce2f7c3b 3170 SET_MARK_OFFSET;
e336de0d 3171
3280af22
NIS		 3172 New(54,PL_scopestack,REASONABLE(32),I32);
3173 PL_scopestack_ix = 0;
3174 PL_scopestack_max = REASONABLE(32);
79072805 3175
3280af22
NIS		 3176 New(54,PL_savestack,REASONABLE(128),ANY);
3177 PL_savestack_ix = 0;
3178 PL_savestack_max = REASONABLE(128);
79072805 3179
3280af22
NIS		 3180 New(54,PL_retstack,REASONABLE(16),OP*);
3181 PL_retstack_ix = 0;
3182 PL_retstack_max = REASONABLE(16);
378cc40b 3183}
33b78306 3184
2ce36478
SM		 3185#undef REASONABLE
3186
76e3520e 3187STATIC void
cea2e8a9 3188S_nuke_stacks(pTHX)
6e72f9df 3189{
3280af22
NIS		 3190 while (PL_curstackinfo->si_next)
3191 PL_curstackinfo = PL_curstackinfo->si_next;
3192 while (PL_curstackinfo) {
3193 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3194 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS		 3195 Safefree(PL_curstackinfo->si_cxstack);
3196 Safefree(PL_curstackinfo);
3197 PL_curstackinfo = p;
e336de0d 3198 }
3280af22
NIS		 3199 Safefree(PL_tmps_stack);
3200 Safefree(PL_markstack);
3201 Safefree(PL_scopestack);
3202 Safefree(PL_savestack);
3203 Safefree(PL_retstack);
378cc40b 3204}
33b78306 3205
76e3520e 3206#ifndef PERL_OBJECT
760ac839 3207static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
76e3520e 3208#endif
7aa04957 3209
76e3520e 3210STATIC void
cea2e8a9 3211S_init_lexer(pTHX)
8990e307 3212{
76e3520e
GS		 3213#ifdef PERL_OBJECT
3214 PerlIO *tmpfp;
3215#endif
3280af22
NIS		 3216 tmpfp = PL_rsfp;
3217 PL_rsfp = Nullfp;
3218 lex_start(PL_linestr);
3219 PL_rsfp = tmpfp;
79cb57f6 3220 PL_subname = newSVpvn("main",4);
8990e307
LW		 3221}
3222
76e3520e 3223STATIC void
cea2e8a9 3224S_init_predump_symbols(pTHX)
45d8adaa 3225{
93a17b20 3226 GV *tmpgv;
af8c498a 3227 IO *io;
79072805 3228
864dbfa3 3229 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS		 3230 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3231 GvMULTI_on(PL_stdingv);
af8c498a
GS		 3232 io = GvIOp(PL_stdingv);
3233 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3234 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3235 GvMULTI_on(tmpgv);
af8c498a 3236 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3237
85e6fe83 3238 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3239 GvMULTI_on(tmpgv);
af8c498a
GS		 3240 io = GvIOp(tmpgv);
3241 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3242 setdefout(tmpgv);
adbc6bb1 3243 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3244 GvMULTI_on(tmpgv);
af8c498a 3245 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3246
bf49b057
GS		 3247 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3248 GvMULTI_on(PL_stderrgv);
3249 io = GvIOp(PL_stderrgv);
af8c498a 3250 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3251 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3252 GvMULTI_on(tmpgv);
af8c498a 3253 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3254
3280af22 3255 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3256
bf4acbe4
GS		 3257 if (PL_osname)
3258 Safefree(PL_osname);
3259 PL_osname = savepv(OSNAME);
79072805 3260}
33b78306 3261
76e3520e 3262STATIC void
cea2e8a9 3263S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
33b78306 3264{
79072805
LW		 3265 char *s;
3266 SV *sv;
3267 GV* tmpgv;
103a7189 3268 char **dup_env_base = 0;
9cbac4c7 3269#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
103a7189 3270 int dup_env_count = 0;
9cbac4c7 3271#endif
fe14fcc3 3272
79072805 3273 argc--,argv++; /* skip name of script */
3280af22 3274 if (PL_doswitches) {
79072805
LW		 3275 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3276 if (!argv[0][1])
3277 break;
379d538a 3278 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW		 3279 argc--,argv++;
3280 break;
3281 }
155aba94 3282 if ((s = strchr(argv[0], '='))) {
79072805 3283 *s++ = '\0';
85e6fe83 3284 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW		 3285 }
3286 else
85e6fe83 3287 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3288 }
79072805 3289 }
3280af22
NIS		 3290 PL_toptarget = NEWSV(0,0);
3291 sv_upgrade(PL_toptarget, SVt_PVFM);
3292 sv_setpvn(PL_toptarget, "", 0);
3293 PL_bodytarget = NEWSV(0,0);
3294 sv_upgrade(PL_bodytarget, SVt_PVFM);
3295 sv_setpvn(PL_bodytarget, "", 0);
3296 PL_formtarget = PL_bodytarget;
79072805 3297
bbce6d69 3298 TAINT;
155aba94 3299 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS		 3300#ifdef MACOS_TRADITIONAL
3301 /* $0 is not majick on a Mac */
3302 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3303#else
3280af22 3304 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3305 magicname("0", "0", 1);
bf4acbe4 3306#endif
79072805 3307 }
155aba94 3308 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV)))
ed344e4f 3309#ifdef OS2
23da6c43 3310 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
ed344e4f 3311#else
3280af22 3312 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
ed344e4f 3313#endif
155aba94 3314 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3280af22
NIS		 3315 GvMULTI_on(PL_argvgv);
3316 (void)gv_AVadd(PL_argvgv);
3317 av_clear(GvAVn(PL_argvgv));
79072805 3318 for (; argc > 0; argc--,argv++) {
729a02f2
GS		 3319 SV *sv = newSVpv(argv[0],0);
3320 av_push(GvAVn(PL_argvgv),sv);
3321 if (PL_widesyscalls)
e84ff256 3322 (void)sv_utf8_decode(sv);
79072805
LW		 3323 }
3324 }
155aba94 3325 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
79072805 3326 HV *hv;
3280af22
NIS		 3327 GvMULTI_on(PL_envgv);
3328 hv = GvHVn(PL_envgv);
65c50114 3329 hv_magic(hv, Nullgv, 'E');
fa6a1c44 3330#ifdef USE_ENVIRON_ARRAY
4633a7c4
LW		 3331 /* Note that if the supplied env parameter is actually a copy
3332 of the global environ then it may now point to free'd memory
3333 if the environment has been modified since. To avoid this
3334 problem we treat env==NULL as meaning 'use the default'
3335 */
3336 if (!env)
3337 env = environ;
5aabfad6 3338 if (env != environ)
79072805 3339 environ[0] = Nullch;
103a7189
JH		 3340#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
3341 {
3342 char **env_base;
3343 for (env_base = env; *env; env++)
3344 dup_env_count++;
3345 if ((dup_env_base = (char **)
3346 safemalloc( sizeof(char *) * (dup_env_count+1) ))) {
3347 char **dup_env;
3348 for (env = env_base, dup_env = dup_env_base;
3349 *env;
3350 env++, dup_env++)
3351 *dup_env = savepv(*env);
3352 *dup_env = Nullch;
3353 env = dup_env_base;
3354 } /* else what? */
3355 }
3356#endif /* NEED_ENVIRON_DUP_FOR_MODIFY */
79072805 3357 for (; *env; env++) {
93a17b20 3358 if (!(s = strchr(*env,'=')))
79072805
LW		 3359 continue;
3360 *s++ = '\0';
60ce6247 3361#if defined(MSDOS)
137443ea 3362 (void)strupr(*env);
3363#endif
79072805
LW		 3364 sv = newSVpv(s--,0);
3365 (void)hv_store(hv, *env, s - *env, sv, 0);
3366 *s = '=';
3e3baf6d
TB		 3367#if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
3368 /* Sins of the RTL. See note in my_setenv(). */
76e3520e 3369 (void)PerlEnv_putenv(savepv(*env));
3e3baf6d 3370#endif
fe14fcc3 3371 }
103a7189
JH		 3372 if (dup_env_base) {
3373 char **dup_env;
3374 for (dup_env = dup_env_base; *dup_env; dup_env++)
3375 Safefree(*dup_env);
3376 Safefree(dup_env_base);
3377 }
3378#endif /* USE_ENVIRON_ARRAY */
4550b24a 3379#ifdef DYNAMIC_ENV_FETCH
3380 HvNAME(hv) = savepv(ENV_HV_NAME);
3381#endif
79072805 3382 }
bbce6d69 3383 TAINT_NOT;
155aba94 3384 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV)))
7766f137 3385 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
33b78306 3386}
34de22dd 3387
76e3520e 3388STATIC void
cea2e8a9 3389S_init_perllib(pTHX)
34de22dd 3390{
85e6fe83 3391 char *s;
3280af22 3392 if (!PL_tainting) {
552a7a9b 3393#ifndef VMS
76e3520e 3394 s = PerlEnv_getenv("PERL5LIB");
85e6fe83 3395 if (s)
9c8a64f0 3396 incpush(s, TRUE, TRUE);
85e6fe83 3397 else
9c8a64f0 3398 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE);
552a7a9b 3399#else /* VMS */
3400 /* Treat PERL5?LIB as a possible search list logical name -- the
3401 * "natural" VMS idiom for a Unix path string. We allow each
3402 * element to be a set of |-separated directories for compatibility.
3403 */
3404 char buf[256];
3405 int idx = 0;
3406 if (my_trnlnm("PERL5LIB",buf,0))
9c8a64f0 3407 do { incpush(buf,TRUE,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
552a7a9b 3408 else
9c8a64f0 3409 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE);
552a7a9b 3410#endif /* VMS */
85e6fe83 3411 }
34de22dd 3412
c90c0ff4 3413/* Use the ~-expanded versions of APPLLIB (undocumented),
65f19062 3414 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
df5cef82 3415*/
4633a7c4 3416#ifdef APPLLIB_EXP
9c8a64f0 3417 incpush(APPLLIB_EXP, TRUE, TRUE);
16d20bd9 3418#endif
4633a7c4 3419
fed7345c 3420#ifdef ARCHLIB_EXP
9c8a64f0 3421 incpush(ARCHLIB_EXP, FALSE, FALSE);
a0d0e21e 3422#endif
bf4acbe4
GS		 3423#ifdef MACOS_TRADITIONAL
3424 {
3425 struct stat tmpstatbuf;
3426 SV * privdir = NEWSV(55, 0);
3427 char * macperl = PerlEnv_getenv("MACPERL");
3428
3429 if (!macperl)
3430 macperl = "";
3431
3432 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
3433 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
3434 incpush(SvPVX(privdir), TRUE, FALSE);
3435 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
3436 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
3437 incpush(SvPVX(privdir), TRUE, FALSE);
ac27b0f5 3438
bf4acbe4
GS		 3439 SvREFCNT_dec(privdir);
3440 }
3441 if (!PL_tainting)
3442 incpush(":", FALSE, FALSE);
3443#else
fed7345c 3444#ifndef PRIVLIB_EXP
65f19062 3445# define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
34de22dd 3446#endif
ac27b0f5 3447#if defined(WIN32)
9c8a64f0 3448 incpush(PRIVLIB_EXP, TRUE, FALSE);
00dc2f4f 3449#else
9c8a64f0 3450 incpush(PRIVLIB_EXP, FALSE, FALSE);
00dc2f4f 3451#endif
4633a7c4 3452
65f19062 3453#ifdef SITEARCH_EXP
3b290362
GS		 3454 /* sitearch is always relative to sitelib on Windows for
3455 * DLL-based path intuition to work correctly */
3456# if !defined(WIN32)
9c8a64f0 3457 incpush(SITEARCH_EXP, FALSE, FALSE);
65f19062
GS		 3458# endif
3459#endif
3460
4633a7c4 3461#ifdef SITELIB_EXP
65f19062