This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
https://perl5.git.perl.org / perl5.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Tweak until Pod::Parser gets updated.
[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)
50dd6e57
GS		 61
62static void S_atfork_lock(void);
63static void S_atfork_unlock(void);
64
65/* this is called in parent before the fork() */
66static void
67S_atfork_lock(void)
68{
69 /* locks must be held in locking order (if any) */
70#ifdef MYMALLOC
71 MUTEX_LOCK(&PL_malloc_mutex);
72#endif
73 OP_REFCNT_LOCK;
74}
75
76/* this is called in both parent and child after the fork() */
77static void
78S_atfork_unlock(void)
79{
80 /* locks must be released in same order as in S_atfork_lock() */
81#ifdef MYMALLOC
82 MUTEX_UNLOCK(&PL_malloc_mutex);
83#endif
84 OP_REFCNT_UNLOCK;
85}
86
06d86050
GS		 87# define INIT_TLS_AND_INTERP \
88 STMT_START { \
89 if (!PL_curinterp) { \
90 PERL_SET_INTERP(my_perl); \
91 INIT_THREADS; \
92 ALLOC_THREAD_KEY; \
534825c4
GS		 93 PERL_SET_THX(my_perl); \
94 OP_REFCNT_INIT; \
50dd6e57
GS		 95 PTHREAD_ATFORK(S_atfork_lock, \
96 S_atfork_unlock, \
97 S_atfork_unlock); \
534825c4
GS		 98 } \
99 else { \
100 PERL_SET_THX(my_perl); \
06d86050 101 } \
06d86050
GS		 102 } STMT_END
103# else
104# define INIT_TLS_AND_INTERP \
105 STMT_START { \
106 if (!PL_curinterp) { \
107 PERL_SET_INTERP(my_perl); \
108 } \
109 PERL_SET_THX(my_perl); \
110 } STMT_END
111# endif
112#endif
113
32e30700
GS		 114#ifdef PERL_IMPLICIT_SYS
115PerlInterpreter *
7766f137
GS		 116perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
117 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
32e30700
GS		 118 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
119 struct IPerlDir* ipD, struct IPerlSock* ipS,
120 struct IPerlProc* ipP)
121{
122 PerlInterpreter *my_perl;
7766f137
GS		 123#ifdef PERL_OBJECT
124 my_perl = (PerlInterpreter*)new(ipM) CPerlObj(ipM, ipMS, ipMP, ipE, ipStd,
125 ipLIO, ipD, ipS, ipP);
06d86050 126 INIT_TLS_AND_INTERP;
7766f137 127#else
32e30700
GS		 128 /* New() needs interpreter, so call malloc() instead */
129 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 130 INIT_TLS_AND_INTERP;
32e30700
GS		 131 Zero(my_perl, 1, PerlInterpreter);
132 PL_Mem = ipM;
7766f137
GS		 133 PL_MemShared = ipMS;
134 PL_MemParse = ipMP;
32e30700
GS		 135 PL_Env = ipE;
136 PL_StdIO = ipStd;
137 PL_LIO = ipLIO;
138 PL_Dir = ipD;
139 PL_Sock = ipS;
140 PL_Proc = ipP;
7766f137
GS		 141#endif
142
32e30700
GS		 143 return my_perl;
144}
145#else
954c1994
GS		 146
147/*
148=for apidoc perl_alloc
149
150Allocates a new Perl interpreter. See L<perlembed>.
151
152=cut
153*/
154
93a17b20 155PerlInterpreter *
cea2e8a9 156perl_alloc(void)
79072805 157{
cea2e8a9 158 PerlInterpreter *my_perl;
79072805 159
54aff467 160 /* New() needs interpreter, so call malloc() instead */
e8ee3774 161 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 162
06d86050 163 INIT_TLS_AND_INTERP;
dedcbb81 164 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 165 return my_perl;
79072805 166}
32e30700 167#endif /* PERL_IMPLICIT_SYS */
79072805 168
954c1994
GS		 169/*
170=for apidoc perl_construct
171
172Initializes a new Perl interpreter. See L<perlembed>.
173
174=cut
175*/
176
79072805 177void
0cb96387 178perl_construct(pTHXx)
79072805 179{
a863c7d1 180#ifdef USE_THREADS
a863c7d1 181#ifndef FAKE_THREADS
e1f15930 182 struct perl_thread *thr = NULL;
a863c7d1
MB		 183#endif /* FAKE_THREADS */
184#endif /* USE_THREADS */
ba869deb 185
8990e307 186#ifdef MULTIPLICITY
54aff467 187 init_interp();
ac27b0f5 188 PL_perl_destruct_level = 1;
54aff467
GS		 189#else
190 if (PL_perl_destruct_level > 0)
191 init_interp();
192#endif
193
33f46ff6 194 /* Init the real globals (and main thread)? */
3280af22 195 if (!PL_linestr) {
1feb2720 196#ifdef USE_THREADS
533c011a 197 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB		 198 /*
199 * Safe to use basic SV functions from now on (though
200 * not things like mortals or tainting yet).
201 */
533c011a
NIS		 202 MUTEX_INIT(&PL_eval_mutex);
203 COND_INIT(&PL_eval_cond);
204 MUTEX_INIT(&PL_threads_mutex);
205 COND_INIT(&PL_nthreads_cond);
ba869deb 206# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 207 MUTEX_INIT(&PL_svref_mutex);
ba869deb 208# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 209
5ff3f7a4 210 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS		 211 MUTEX_INIT(&PL_sv_lock_mutex);
212 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 213
199100c8 214 thr = init_main_thread();
11343788
MB		 215#endif /* USE_THREADS */
216
14dd3ad8 217#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 218 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 219#endif
312caa8e 220
2aea9f8a
GS		 221 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
222
3280af22
NIS		 223 PL_linestr = NEWSV(65,79);
224 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 225
3280af22 226 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP		 227 /* set read-only and try to insure than we wont see REFCNT==0
228 very often */
229
3280af22
NIS		 230 SvREADONLY_on(&PL_sv_undef);
231 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 232
3280af22
NIS		 233 sv_setpv(&PL_sv_no,PL_No);
234 SvNV(&PL_sv_no);
235 SvREADONLY_on(&PL_sv_no);
236 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 237
3280af22
NIS		 238 sv_setpv(&PL_sv_yes,PL_Yes);
239 SvNV(&PL_sv_yes);
240 SvREADONLY_on(&PL_sv_yes);
241 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 242 }
79072805 243
76e3520e
GS		 244#ifdef PERL_OBJECT
245 /* TODO: */
6b88bc9c 246 /* PL_sighandlerp = sighandler; */
76e3520e 247#else
cea2e8a9 248 PL_sighandlerp = Perl_sighandler;
76e3520e 249#endif
3280af22 250 PL_pidstatus = newHV();
44a8e56a 251
79072805
LW		 252#ifdef MSDOS
253 /*
254 * There is no way we can refer to them from Perl so close them to save
255 * space. The other alternative would be to provide STDAUX and STDPRN
256 * filehandles.
257 */
2b96b0a5
JH		 258 (void)PerlIO_close(PerlIO_importFILE(stdaux, 0));
259 (void)PerlIO_close(PerlIO_importFILE(stdprn, 0));
79072805
LW		 260#endif
261 }
262
79cb57f6 263 PL_nrs = newSVpvn("\n", 1);
3280af22 264 PL_rs = SvREFCNT_inc(PL_nrs);
dc92893f 265
cea2e8a9 266 init_stacks();
79072805 267
748a9306 268 init_ids();
3280af22 269 PL_lex_state = LEX_NOTPARSING;
a5f75d66 270
312caa8e 271 JMPENV_BOOTSTRAP;
f86702cc 272 STATUS_ALL_SUCCESS;
273
0672f40e 274 init_i18nl10n(1);
36477c24 275 SET_NUMERIC_STANDARD();
0b5b802d 276
a7cb1f99
GS		 277 {
278 U8 *s;
279 PL_patchlevel = NEWSV(0,4);
155aba94 280 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 281 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 282 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 283 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS		 284 /* Build version strings using "native" characters */
285 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
286 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
287 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS		 288 *s = '\0';
289 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
290 SvPOK_on(PL_patchlevel);
291 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
292 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 293#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 294 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 295#endif
a7cb1f99
GS		 296 ;
297 SvNOK_on(PL_patchlevel); /* dual valued */
298 SvUTF8_on(PL_patchlevel);
299 SvREADONLY_on(PL_patchlevel);
300 }
79072805 301
ab821d7f 302#if defined(LOCAL_PATCH_COUNT)
3280af22 303 PL_localpatches = local_patches; /* For possible -v */
ab821d7f 304#endif
305
52853b95
GS		 306#ifdef HAVE_INTERP_INTERN
307 sys_intern_init();
308#endif
309
4b556e6c 310 PerlIO_init(); /* Hook to IO system */
760ac839 311
3280af22
NIS		 312 PL_fdpid = newAV(); /* for remembering popen pids by fd */
313 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 314 PL_errors = newSVpvn("",0);
8990e307 315
8990e307 316 ENTER;
79072805
LW		 317}
318
954c1994
GS		 319/*
320=for apidoc perl_destruct
321
322Shuts down a Perl interpreter. See L<perlembed>.
323
324=cut
325*/
326
79072805 327void
0cb96387 328perl_destruct(pTHXx)
79072805 329{
748a9306 330 int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 331 HV *hv;
1f2bfc8a 332#ifdef USE_THREADS
33f46ff6 333 Thread t;
cea2e8a9 334 dTHX;
1f2bfc8a 335#endif /* USE_THREADS */
8990e307 336
7766f137
GS		 337 /* wait for all pseudo-forked children to finish */
338 PERL_WAIT_FOR_CHILDREN;
339
11343788 340#ifdef USE_THREADS
0f15f207 341#ifndef FAKE_THREADS
8023c3ce
MB		 342 /* Pass 1 on any remaining threads: detach joinables, join zombies */
343 retry_cleanup:
533c011a 344 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 345 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 346 "perl_destruct: waiting for %d threads...\n",
533c011a 347 PL_nthreads - 1));
33f46ff6 348 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB		 349 MUTEX_LOCK(&t->mutex);
350 switch (ThrSTATE(t)) {
351 AV *av;
c7848ba1 352 case THRf_ZOMBIE:
bf49b057 353 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 354 "perl_destruct: joining zombie %p\n", t));
605e5515
MB		 355 ThrSETSTATE(t, THRf_DEAD);
356 MUTEX_UNLOCK(&t->mutex);
533c011a 357 PL_nthreads--;
8023c3ce
MB		 358 /*
359 * The SvREFCNT_dec below may take a long time (e.g. av
360 * may contain an object scalar whose destructor gets
361 * called) so we have to unlock threads_mutex and start
362 * all over again.
363 */
533c011a 364 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 365 JOIN(t, &av);
605e5515 366 SvREFCNT_dec((SV*)av);
bf49b057 367 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 368 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 369 goto retry_cleanup;
c7848ba1 370 case THRf_R_JOINABLE:
bf49b057 371 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 372 "perl_destruct: detaching thread %p\n", t));
373 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 374 /*
c7848ba1
MB		 375 * We unlock threads_mutex and t->mutex in the opposite order
376 * from which we locked them just so that DETACH won't
377 * deadlock if it panics. It's only a breach of good style
378 * not a bug since they are unlocks not locks.
379 */
533c011a 380 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB		 381 DETACH(t);
382 MUTEX_UNLOCK(&t->mutex);
8023c3ce 383 goto retry_cleanup;
c7848ba1 384 default:
bf49b057 385 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 386 "perl_destruct: ignoring %p (state %u)\n",
387 t, ThrSTATE(t)));
388 MUTEX_UNLOCK(&t->mutex);
c7848ba1 389 /* fall through and out */
33f46ff6
MB		 390 }
391 }
8023c3ce
MB		 392 /* We leave the above "Pass 1" loop with threads_mutex still locked */
393
394 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 395 while (PL_nthreads > 1)
11343788 396 {
bf49b057 397 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 398 "perl_destruct: final wait for %d threads\n",
533c011a
NIS		 399 PL_nthreads - 1));
400 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB		 401 }
402 /* At this point, we're the last thread */
533c011a 403 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 404 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS		 405 MUTEX_DESTROY(&PL_threads_mutex);
406 COND_DESTROY(&PL_nthreads_cond);
b57a092c 407 PL_nthreads--;
0f15f207 408#endif /* !defined(FAKE_THREADS) */
11343788
MB		 409#endif /* USE_THREADS */
410
3280af22 411 destruct_level = PL_perl_destruct_level;
4633a7c4
LW		 412#ifdef DEBUGGING
413 {
414 char *s;
155aba94 415 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc 416 int i = atoi(s);
417 if (destruct_level < i)
418 destruct_level = i;
419 }
4633a7c4
LW		 420 }
421#endif
422
8990e307 423 LEAVE;
a0d0e21e
LW		 424 FREETMPS;
425
13621cfb 426
ff0cee69 427 /* We must account for everything. */
428
429 /* Destroy the main CV and syntax tree */
3280af22
NIS		 430 if (PL_main_root) {
431 PL_curpad = AvARRAY(PL_comppad);
432 op_free(PL_main_root);
433 PL_main_root = Nullop;
a0d0e21e 434 }
3280af22
NIS		 435 PL_curcop = &PL_compiling;
436 PL_main_start = Nullop;
437 SvREFCNT_dec(PL_main_cv);
438 PL_main_cv = Nullcv;
24d3c518 439 PL_dirty = TRUE;
ff0cee69 440
13621cfb
NIS		 441 /* Tell PerlIO we are about to tear things apart in case
442 we have layers which are using resources that should
443 be cleaned up now.
444 */
445
446 PerlIO_destruct(aTHX);
447
3280af22 448 if (PL_sv_objcount) {
a0d0e21e
LW		 449 /*
450 * Try to destruct global references. We do this first so that the
451 * destructors and destructees still exist. Some sv's might remain.
452 * Non-referenced objects are on their own.
453 */
a0d0e21e 454 sv_clean_objs();
8990e307
LW		 455 }
456
5cd24f17 457 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS		 458 SvREFCNT_dec(PL_warnhook);
459 PL_warnhook = Nullsv;
460 SvREFCNT_dec(PL_diehook);
461 PL_diehook = Nullsv;
5cd24f17 462
4b556e6c 463 /* call exit list functions */
3280af22 464 while (PL_exitlistlen-- > 0)
0cb96387 465 PL_exitlist[PL_exitlistlen].fn(aTHXo_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 466
3280af22 467 Safefree(PL_exitlist);
4b556e6c 468
a0d0e21e 469 if (destruct_level == 0){
8990e307 470
a0d0e21e 471 DEBUG_P(debprofdump());
ac27b0f5 472
a0d0e21e
LW		 473 /* The exit() function will do everything that needs doing. */
474 return;
475 }
5dd60ef7 476
551a8b83
JH		 477 /* jettison our possibly duplicated environment */
478
479#ifdef USE_ENVIRON_ARRAY
480 if (environ != PL_origenviron) {
481 I32 i;
482
483 for (i = 0; environ[i]; i++)
4b420006
JH		 484 safesysfree(environ[i]);
485 /* Must use safesysfree() when working with environ. */
486 safesysfree(environ);
551a8b83
JH		 487
488 environ = PL_origenviron;
489 }
490#endif
491
5f05dabc 492 /* loosen bonds of global variables */
493
3280af22
NIS		 494 if(PL_rsfp) {
495 (void)PerlIO_close(PL_rsfp);
496 PL_rsfp = Nullfp;
8ebc5c01 497 }
498
499 /* Filters for program text */
3280af22
NIS		 500 SvREFCNT_dec(PL_rsfp_filters);
501 PL_rsfp_filters = Nullav;
8ebc5c01 502
503 /* switches */
3280af22
NIS		 504 PL_preprocess = FALSE;
505 PL_minus_n = FALSE;
506 PL_minus_p = FALSE;
507 PL_minus_l = FALSE;
508 PL_minus_a = FALSE;
509 PL_minus_F = FALSE;
510 PL_doswitches = FALSE;
599cee73 511 PL_dowarn = G_WARN_OFF;
3280af22
NIS		 512 PL_doextract = FALSE;
513 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS		 514 PL_unsafe = FALSE;
515
516 Safefree(PL_inplace);
517 PL_inplace = Nullch;
a7cb1f99 518 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS		 519
520 if (PL_e_script) {
521 SvREFCNT_dec(PL_e_script);
522 PL_e_script = Nullsv;
8ebc5c01 523 }
524
525 /* magical thingies */
526
7889fe52
NIS		 527 SvREFCNT_dec(PL_ofs_sv); /* $, */
528 PL_ofs_sv = Nullsv;
5f05dabc 529
7889fe52
NIS		 530 SvREFCNT_dec(PL_ors_sv); /* $\ */
531 PL_ors_sv = Nullsv;
8ebc5c01 532
3280af22
NIS		 533 SvREFCNT_dec(PL_rs); /* $/ */
534 PL_rs = Nullsv;
dc92893f 535
3280af22
NIS		 536 SvREFCNT_dec(PL_nrs); /* $/ helper */
537 PL_nrs = Nullsv;
5f05dabc 538
d33b2eba
GS		 539 PL_multiline = 0; /* $* */
540 Safefree(PL_osname); /* $^O */
541 PL_osname = Nullch;
5f05dabc 542
3280af22
NIS		 543 SvREFCNT_dec(PL_statname);
544 PL_statname = Nullsv;
545 PL_statgv = Nullgv;
5f05dabc 546
8ebc5c01 547 /* defgv, aka *_ should be taken care of elsewhere */
548
8ebc5c01 549 /* clean up after study() */
3280af22
NIS		 550 SvREFCNT_dec(PL_lastscream);
551 PL_lastscream = Nullsv;
552 Safefree(PL_screamfirst);
553 PL_screamfirst = 0;
554 Safefree(PL_screamnext);
555 PL_screamnext = 0;
8ebc5c01 556
7d5ea4e7
GS		 557 /* float buffer */
558 Safefree(PL_efloatbuf);
559 PL_efloatbuf = Nullch;
560 PL_efloatsize = 0;
561
8ebc5c01 562 /* startup and shutdown function lists */
3280af22
NIS		 563 SvREFCNT_dec(PL_beginav);
564 SvREFCNT_dec(PL_endav);
7d30b5c4 565 SvREFCNT_dec(PL_checkav);
3280af22
NIS		 566 SvREFCNT_dec(PL_initav);
567 PL_beginav = Nullav;
568 PL_endav = Nullav;
7d30b5c4 569 PL_checkav = Nullav;
3280af22 570 PL_initav = Nullav;
5618dfe8 571
8ebc5c01 572 /* shortcuts just get cleared */
3280af22 573 PL_envgv = Nullgv;
3280af22
NIS		 574 PL_incgv = Nullgv;
575 PL_hintgv = Nullgv;
576 PL_errgv = Nullgv;
577 PL_argvgv = Nullgv;
578 PL_argvoutgv = Nullgv;
579 PL_stdingv = Nullgv;
bf49b057 580 PL_stderrgv = Nullgv;
3280af22
NIS		 581 PL_last_in_gv = Nullgv;
582 PL_replgv = Nullgv;
5c831c24 583 PL_debstash = Nullhv;
8ebc5c01 584
585 /* reset so print() ends up where we expect */
586 setdefout(Nullgv);
5c831c24 587
7a1c5554
GS		 588 SvREFCNT_dec(PL_argvout_stack);
589 PL_argvout_stack = Nullav;
8ebc5c01 590
5c831c24
GS		 591 SvREFCNT_dec(PL_modglobal);
592 PL_modglobal = Nullhv;
593 SvREFCNT_dec(PL_preambleav);
594 PL_preambleav = Nullav;
595 SvREFCNT_dec(PL_subname);
596 PL_subname = Nullsv;
597 SvREFCNT_dec(PL_linestr);
598 PL_linestr = Nullsv;
599 SvREFCNT_dec(PL_pidstatus);
600 PL_pidstatus = Nullhv;
601 SvREFCNT_dec(PL_toptarget);
602 PL_toptarget = Nullsv;
603 SvREFCNT_dec(PL_bodytarget);
604 PL_bodytarget = Nullsv;
605 PL_formtarget = Nullsv;
606
d33b2eba 607 /* free locale stuff */
b9582b6a 608#ifdef USE_LOCALE_COLLATE
d33b2eba
GS		 609 Safefree(PL_collation_name);
610 PL_collation_name = Nullch;
b9582b6a 611#endif
d33b2eba 612
b9582b6a 613#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS		 614 Safefree(PL_numeric_name);
615 PL_numeric_name = Nullch;
a453c169 616 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 617#endif
d33b2eba 618
5c831c24
GS		 619 /* clear utf8 character classes */
620 SvREFCNT_dec(PL_utf8_alnum);
621 SvREFCNT_dec(PL_utf8_alnumc);
622 SvREFCNT_dec(PL_utf8_ascii);
623 SvREFCNT_dec(PL_utf8_alpha);
624 SvREFCNT_dec(PL_utf8_space);
625 SvREFCNT_dec(PL_utf8_cntrl);
626 SvREFCNT_dec(PL_utf8_graph);
627 SvREFCNT_dec(PL_utf8_digit);
628 SvREFCNT_dec(PL_utf8_upper);
629 SvREFCNT_dec(PL_utf8_lower);
630 SvREFCNT_dec(PL_utf8_print);
631 SvREFCNT_dec(PL_utf8_punct);
632 SvREFCNT_dec(PL_utf8_xdigit);
633 SvREFCNT_dec(PL_utf8_mark);
634 SvREFCNT_dec(PL_utf8_toupper);
635 SvREFCNT_dec(PL_utf8_tolower);
636 PL_utf8_alnum = Nullsv;
637 PL_utf8_alnumc = Nullsv;
638 PL_utf8_ascii = Nullsv;
639 PL_utf8_alpha = Nullsv;
640 PL_utf8_space = Nullsv;
641 PL_utf8_cntrl = Nullsv;
642 PL_utf8_graph = Nullsv;
643 PL_utf8_digit = Nullsv;
644 PL_utf8_upper = Nullsv;
645 PL_utf8_lower = Nullsv;
646 PL_utf8_print = Nullsv;
647 PL_utf8_punct = Nullsv;
648 PL_utf8_xdigit = Nullsv;
649 PL_utf8_mark = Nullsv;
650 PL_utf8_toupper = Nullsv;
651 PL_utf8_totitle = Nullsv;
652 PL_utf8_tolower = Nullsv;
653
971a9dd3
GS		 654 if (!specialWARN(PL_compiling.cop_warnings))
655 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 656 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS		 657 if (!specialCopIO(PL_compiling.cop_io))
658 SvREFCNT_dec(PL_compiling.cop_io);
659 PL_compiling.cop_io = Nullsv;
f4dd75d9
GS		 660#ifdef USE_ITHREADS
661 Safefree(CopFILE(&PL_compiling));
662 CopFILE(&PL_compiling) = Nullch;
663 Safefree(CopSTASHPV(&PL_compiling));
664#else
01724ea0 665 SvREFCNT_dec(CopFILEGV(&PL_compiling));
f4dd75d9
GS		 666 CopFILEGV(&PL_compiling) = Nullgv;
667 /* cop_stash is not refcounted */
01724ea0 668#endif
5c831c24 669
a0d0e21e 670 /* Prepare to destruct main symbol table. */
5f05dabc 671
3280af22
NIS		 672 hv = PL_defstash;
673 PL_defstash = 0;
a0d0e21e 674 SvREFCNT_dec(hv);
5c831c24
GS		 675 SvREFCNT_dec(PL_curstname);
676 PL_curstname = Nullsv;
a0d0e21e 677
5a844595
GS		 678 /* clear queued errors */
679 SvREFCNT_dec(PL_errors);
680 PL_errors = Nullsv;
681
a0d0e21e 682 FREETMPS;
0453d815 683 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 684 if (PL_scopestack_ix != 0)
0453d815
PM		 685 Perl_warner(aTHX_ WARN_INTERNAL,
686 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS		 687 (long)PL_scopestack_ix);
688 if (PL_savestack_ix != 0)
0453d815
PM		 689 Perl_warner(aTHX_ WARN_INTERNAL,
690 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS		 691 (long)PL_savestack_ix);
692 if (PL_tmps_floor != -1)
0453d815 693 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 694 (long)PL_tmps_floor + 1);
a0d0e21e 695 if (cxstack_ix != -1)
0453d815 696 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 697 (long)cxstack_ix + 1);
a0d0e21e 698 }
8990e307
LW		 699
700 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 701 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 702 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH		 703
704 /* the 2 is for PL_fdpid and PL_strtab */
705 while (PL_sv_count > 2 && sv_clean_all())
706 ;
707
d33b2eba
GS		 708 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
709 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS		 710 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
711 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 712
d4777f27
GS		 713 AvREAL_off(PL_fdpid); /* no surviving entries */
714 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS		 715 PL_fdpid = Nullav;
716
6c644e78
GS		 717#ifdef HAVE_INTERP_INTERN
718 sys_intern_clear();
719#endif
720
6e72f9df 721 /* Destruct the global string table. */
722 {
723 /* Yell and reset the HeVAL() slots that are still holding refcounts,
724 * so that sv_free() won't fail on them.
725 */
726 I32 riter;
727 I32 max;
728 HE *hent;
729 HE **array;
730
731 riter = 0;
3280af22
NIS		 732 max = HvMAX(PL_strtab);
733 array = HvARRAY(PL_strtab);
6e72f9df 734 hent = array[0];
735 for (;;) {
0453d815
PM		 736 if (hent && ckWARN_d(WARN_INTERNAL)) {
737 Perl_warner(aTHX_ WARN_INTERNAL,
738 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df 739 HeVAL(hent) - Nullsv, HeKEY(hent));
740 HeVAL(hent) = Nullsv;
741 hent = HeNEXT(hent);
742 }
743 if (!hent) {
744 if (++riter > max)
745 break;
746 hent = array[riter];
747 }
748 }
749 }
3280af22 750 SvREFCNT_dec(PL_strtab);
6e72f9df 751
e652bb2f 752#ifdef USE_ITHREADS
a0739874
DM		 753 /* free the pointer table used for cloning */
754 ptr_table_free(PL_ptr_table);
53186e96 755#endif
a0739874 756
d33b2eba
GS		 757 /* free special SVs */
758
759 SvREFCNT(&PL_sv_yes) = 0;
760 sv_clear(&PL_sv_yes);
761 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 762 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS		 763
764 SvREFCNT(&PL_sv_no) = 0;
765 sv_clear(&PL_sv_no);
766 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 767 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS		 768
769 SvREFCNT(&PL_sv_undef) = 0;
770 SvREADONLY_off(&PL_sv_undef);
d33b2eba 771
0453d815
PM		 772 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
773 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 774
3280af22 775 Safefree(PL_origfilename);
3280af22 776 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ		 777 if (PL_reg_curpm)
778 Safefree(PL_reg_curpm);
82ba1be6 779 Safefree(PL_reg_poscache);
3280af22
NIS		 780 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
781 Safefree(PL_op_mask);
cf36064f
GS		 782 Safefree(PL_psig_ptr);
783 Safefree(PL_psig_name);
2c2666fc 784 Safefree(PL_bitcount);
ce08f86c 785 Safefree(PL_psig_pend);
6e72f9df 786 nuke_stacks();
3280af22 787 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 788
a0d0e21e 789 DEBUG_P(debprofdump());
11343788 790#ifdef USE_THREADS
5f08fbcd 791 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS		 792 MUTEX_DESTROY(&PL_sv_mutex);
793 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 794 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 795 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 796 COND_DESTROY(&PL_eval_cond);
11d617a5
GS		 797#ifdef EMULATE_ATOMIC_REFCOUNTS
798 MUTEX_DESTROY(&PL_svref_mutex);
799#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 800
8023c3ce 801 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS		 802 Safefree(SvPVX(PL_thrsv));
803 Safefree(SvANY(PL_thrsv));
804 Safefree(PL_thrsv);
805 PL_thrsv = Nullsv;
8023c3ce 806#endif /* USE_THREADS */
d33b2eba 807
612f20c3
GS		 808 sv_free_arenas();
809
fc36a67e 810 /* As the absolutely last thing, free the non-arena SV for mess() */
811
3280af22 812 if (PL_mess_sv) {
9c63abab
GS		 813 /* it could have accumulated taint magic */
814 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
815 MAGIC* mg;
816 MAGIC* moremagic;
817 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
818 moremagic = mg->mg_moremagic;
14befaf4
DM		 819 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
820 && mg->mg_len >= 0)
9c63abab
GS		 821 Safefree(mg->mg_ptr);
822 Safefree(mg);
823 }
824 }
fc36a67e 825 /* we know that type >= SVt_PV */
155aba94 826 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS		 827 Safefree(SvPVX(PL_mess_sv));
828 Safefree(SvANY(PL_mess_sv));
829 Safefree(PL_mess_sv);
830 PL_mess_sv = Nullsv;
fc36a67e 831 }
79072805
LW		 832}
833
954c1994
GS		 834/*
835=for apidoc perl_free
836
837Releases a Perl interpreter. See L<perlembed>.
838
839=cut
840*/
841
79072805 842void
0cb96387 843perl_free(pTHXx)
79072805 844{
c5be433b 845#if defined(PERL_OBJECT)
7f0d82f7 846 PerlMem_free(this);
76e3520e 847#else
2986a63f 848# if defined(WIN32) || defined(NETWARE)
ce3e5b80 849# if defined(PERL_IMPLICIT_SYS)
2986a63f
JH		 850 #ifdef NETWARE
851 void *host = nw_internal_host;
852 #else
853 void *host = w32_internal_host;
854 #endif
855 #ifndef NETWARE
856 if (PerlProc_lasthost()) {
ce08f86c 857 PerlIO_cleanup();
2986a63f
JH		 858 }
859 #endif
7f0d82f7 860 PerlMem_free(aTHXx);
2986a63f
JH		 861 #ifdef NETWARE
862 nw5_delete_internal_host(host);
863 #else
864 win32_delete_internal_host(host);
865 #endif
ce3e5b80 866#else
ce08f86c 867 PerlIO_cleanup();
ce3e5b80
NIS		 868 PerlMem_free(aTHXx);
869#endif
1c0ca838
GS		 870# else
871 PerlMem_free(aTHXx);
872# endif
76e3520e 873#endif
79072805
LW		 874}
875
4b556e6c 876void
864dbfa3 877Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 878{
3280af22
NIS		 879 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
880 PL_exitlist[PL_exitlistlen].fn = fn;
881 PL_exitlist[PL_exitlistlen].ptr = ptr;
882 ++PL_exitlistlen;
4b556e6c
JD		 883}
884
954c1994
GS		 885/*
886=for apidoc perl_parse
887
888Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
889
890=cut
891*/
892
79072805 893int
0cb96387 894perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 895{
6224f72b 896 I32 oldscope;
6224f72b 897 int ret;
db36c5a1 898 dJMPENV;
cea2e8a9
GS		 899#ifdef USE_THREADS
900 dTHX;
901#endif
8d063cd8 902
a687059c
LW		 903#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
904#ifdef IAMSUID
905#undef IAMSUID
cea2e8a9 906 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW		 907setuid perl scripts securely.\n");
908#endif
909#endif
910
8f1f23e8 911#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
6e72f9df 912 _dyld_lookup_and_bind
913 ("__environ", (unsigned long *) &environ_pointer, NULL);
914#endif /* environ */
915
3280af22
NIS		 916 PL_origargv = argv;
917 PL_origargc = argc;
fa6a1c44 918#ifdef USE_ENVIRON_ARRAY
3280af22 919 PL_origenviron = environ;
a0d0e21e
LW		 920#endif
921
3280af22 922 if (PL_do_undump) {
a0d0e21e
LW		 923
924 /* Come here if running an undumped a.out. */
925
3280af22
NIS		 926 PL_origfilename = savepv(argv[0]);
927 PL_do_undump = FALSE;
a0d0e21e 928 cxstack_ix = -1; /* start label stack again */
748a9306 929 init_ids();
a0d0e21e
LW		 930 init_postdump_symbols(argc,argv,env);
931 return 0;
932 }
933
3280af22
NIS		 934 if (PL_main_root) {
935 PL_curpad = AvARRAY(PL_comppad);
936 op_free(PL_main_root);
937 PL_main_root = Nullop;
ff0cee69 938 }
3280af22
NIS		 939 PL_main_start = Nullop;
940 SvREFCNT_dec(PL_main_cv);
941 PL_main_cv = Nullcv;
79072805 942
3280af22
NIS		 943 time(&PL_basetime);
944 oldscope = PL_scopestack_ix;
599cee73 945 PL_dowarn = G_WARN_OFF;
f86702cc 946
14dd3ad8
GS		 947#ifdef PERL_FLEXIBLE_EXCEPTIONS
948 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
949#else
950 JMPENV_PUSH(ret);
951#endif
6224f72b 952 switch (ret) {
312caa8e 953 case 0:
14dd3ad8
GS		 954#ifndef PERL_FLEXIBLE_EXCEPTIONS
955 parse_body(env,xsinit);
956#endif
7d30b5c4
GS		 957 if (PL_checkav)
958 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 959 ret = 0;
960 break;
6224f72b
GS		 961 case 1:
962 STATUS_ALL_FAILURE;
963 /* FALL THROUGH */
964 case 2:
965 /* my_exit() was called */
3280af22 966 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 967 LEAVE;
968 FREETMPS;
3280af22 969 PL_curstash = PL_defstash;
7d30b5c4
GS		 970 if (PL_checkav)
971 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 972 ret = STATUS_NATIVE_EXPORT;
973 break;
6224f72b 974 case 3:
bf49b057 975 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS		 976 ret = 1;
977 break;
6224f72b 978 }
14dd3ad8
GS		 979 JMPENV_POP;
980 return ret;
981}
982
983#ifdef PERL_FLEXIBLE_EXCEPTIONS
984STATIC void *
985S_vparse_body(pTHX_ va_list args)
986{
987 char **env = va_arg(args, char**);
988 XSINIT_t xsinit = va_arg(args, XSINIT_t);
989
990 return parse_body(env, xsinit);
312caa8e 991}
14dd3ad8 992#endif
312caa8e
CS		 993
994STATIC void *
14dd3ad8 995S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 996{
312caa8e
CS		 997 int argc = PL_origargc;
998 char **argv = PL_origargv;
312caa8e
CS		 999 char *scriptname = NULL;
1000 int fdscript = -1;
1001 VOL bool dosearch = FALSE;
1002 char *validarg = "";
1003 AV* comppadlist;
1004 register SV *sv;
1005 register char *s;
659ca9ea 1006 char *popts, *cddir = Nullch;
312caa8e 1007
3280af22 1008 sv_setpvn(PL_linestr,"",0);
79cb57f6 1009 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS		 1010 SAVEFREESV(sv);
1011 init_main_stash();
54310121 1012
6224f72b
GS		 1013 for (argc--,argv++; argc > 0; argc--,argv++) {
1014 if (argv[0][0] != '-' || !argv[0][1])
1015 break;
1016#ifdef DOSUID
1017 if (*validarg)
1018 validarg = " PHOOEY ";
1019 else
1020 validarg = argv[0];
13281fa4 1021#endif
6224f72b
GS		 1022 s = argv[0]+1;
1023 reswitch:
1024 switch (*s) {
729a02f2
GS		 1025 case 'C':
1026#ifdef WIN32
c0932edc 1027 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS		 1028 /* FALL THROUGH */
1029#endif
1d5472a9
GS		 1030#ifndef PERL_STRICT_CR
1031 case '\r':
1032#endif
6224f72b
GS		 1033 case ' ':
1034 case '0':
1035 case 'F':
1036 case 'a':
1037 case 'c':
1038 case 'd':
1039 case 'D':
1040 case 'h':
1041 case 'i':
1042 case 'l':
1043 case 'M':
1044 case 'm':
1045 case 'n':
1046 case 'p':
1047 case 's':
1048 case 'u':
1049 case 'U':
1050 case 'v':
599cee73
PM		 1051 case 'W':
1052 case 'X':
6224f72b 1053 case 'w':
155aba94 1054 if ((s = moreswitches(s)))
6224f72b
GS		 1055 goto reswitch;
1056 break;
33b78306 1057
6224f72b 1058 case 'T':
3280af22 1059 PL_tainting = TRUE;
6224f72b
GS		 1060 s++;
1061 goto reswitch;
f86702cc 1062
6224f72b 1063 case 'e':
bf4acbe4
GS		 1064#ifdef MACOS_TRADITIONAL
1065 /* ignore -e for Dev:Pseudo argument */
1066 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1067 break;
bf4acbe4 1068#endif
3280af22 1069 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1070 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1071 if (!PL_e_script) {
79cb57f6 1072 PL_e_script = newSVpvn("",0);
0cb96387 1073 filter_add(read_e_script, NULL);
6224f72b
GS		 1074 }
1075 if (*++s)
3280af22 1076 sv_catpv(PL_e_script, s);
6224f72b 1077 else if (argv[1]) {
3280af22 1078 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS		 1079 argc--,argv++;
1080 }
1081 else
cea2e8a9 1082 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1083 sv_catpv(PL_e_script, "\n");
6224f72b 1084 break;
afe37c7d 1085
6224f72b
GS		 1086 case 'I': /* -I handled both here and in moreswitches() */
1087 forbid_setid("-I");
1088 if (!*++s && (s=argv[1]) != Nullch) {
1089 argc--,argv++;
1090 }
6224f72b 1091 if (s && *s) {
0df16ed7
GS		 1092 char *p;
1093 STRLEN len = strlen(s);
1094 p = savepvn(s, len);
9c8a64f0 1095 incpush(p, TRUE, TRUE);
0df16ed7
GS		 1096 sv_catpvn(sv, "-I", 2);
1097 sv_catpvn(sv, p, len);
1098 sv_catpvn(sv, " ", 1);
6224f72b 1099 Safefree(p);
0df16ed7
GS		 1100 }
1101 else
a67e862a 1102 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS		 1103 break;
1104 case 'P':
1105 forbid_setid("-P");
3280af22 1106 PL_preprocess = TRUE;
6224f72b
GS		 1107 s++;
1108 goto reswitch;
1109 case 'S':
1110 forbid_setid("-S");
1111 dosearch = TRUE;
1112 s++;
1113 goto reswitch;
1114 case 'V':
3280af22
NIS		 1115 if (!PL_preambleav)
1116 PL_preambleav = newAV();
1117 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1118 if (*++s != ':') {
3280af22 1119 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1120#ifdef VMS
6b88bc9c 1121 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1122#else
3280af22 1123 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1124#endif
3280af22 1125 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1126# ifdef DEBUGGING
3280af22 1127 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1128# endif
6224f72b 1129# ifdef MULTIPLICITY
8f872242 1130 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1131# endif
b363f7ed
GS		 1132# ifdef USE_THREADS
1133 sv_catpv(PL_Sv," USE_THREADS");
1134# endif
ac5e8965
JH		 1135# ifdef USE_ITHREADS
1136 sv_catpv(PL_Sv," USE_ITHREADS");
1137# endif
10cc9d2a
JH		 1138# ifdef USE_64_BIT_INT
1139 sv_catpv(PL_Sv," USE_64_BIT_INT");
1140# endif
1141# ifdef USE_64_BIT_ALL
1142 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH		 1143# endif
1144# ifdef USE_LONG_DOUBLE
1145 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1146# endif
53430762
JH		 1147# ifdef USE_LARGE_FILES
1148 sv_catpv(PL_Sv," USE_LARGE_FILES");
1149# endif
ac5e8965
JH		 1150# ifdef USE_SOCKS
1151 sv_catpv(PL_Sv," USE_SOCKS");
1152# endif
b363f7ed
GS		 1153# ifdef PERL_OBJECT
1154 sv_catpv(PL_Sv," PERL_OBJECT");
1155# endif
1156# ifdef PERL_IMPLICIT_CONTEXT
1157 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1158# endif
1159# ifdef PERL_IMPLICIT_SYS
1160 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1161# endif
3280af22 1162 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1163
6224f72b
GS		 1164#if defined(LOCAL_PATCH_COUNT)
1165 if (LOCAL_PATCH_COUNT > 0) {
1166 int i;
3280af22 1167 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1168 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1169 if (PL_localpatches[i])
cea2e8a9 1170 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS		 1171 }
1172 }
1173#endif
cea2e8a9 1174 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS		 1175#ifdef __DATE__
1176# ifdef __TIME__
cea2e8a9 1177 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1178# else
cea2e8a9 1179 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS		 1180# endif
1181#endif
3280af22 1182 sv_catpv(PL_Sv, "; \
6224f72b 1183$\"=\"\\n \"; \
69fcd688
JH		 1184@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1185#ifdef __CYGWIN__
1186 sv_catpv(PL_Sv,"\
1187push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1188#endif
1189 sv_catpv(PL_Sv, "\
6224f72b
GS		 1190print \" \\%ENV:\\n @env\\n\" if @env; \
1191print \" \\@INC:\\n @INC\\n\";");
1192 }
1193 else {
3280af22
NIS		 1194 PL_Sv = newSVpv("config_vars(qw(",0);
1195 sv_catpv(PL_Sv, ++s);
1196 sv_catpv(PL_Sv, "))");
6224f72b
GS		 1197 s += strlen(s);
1198 }
3280af22 1199 av_push(PL_preambleav, PL_Sv);
6224f72b
GS		 1200 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1201 goto reswitch;
1202 case 'x':
3280af22 1203 PL_doextract = TRUE;
6224f72b
GS		 1204 s++;
1205 if (*s)
f4c556ac 1206 cddir = s;
6224f72b
GS		 1207 break;
1208 case 0:
1209 break;
1210 case '-':
1211 if (!*++s || isSPACE(*s)) {
1212 argc--,argv++;
1213 goto switch_end;
1214 }
1215 /* catch use of gnu style long options */
1216 if (strEQ(s, "version")) {
1217 s = "v";
1218 goto reswitch;
1219 }
1220 if (strEQ(s, "help")) {
1221 s = "h";
1222 goto reswitch;
1223 }
1224 s--;
1225 /* FALL THROUGH */
1226 default:
cea2e8a9 1227 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW		 1228 }
1229 }
6224f72b 1230 switch_end:
54310121 1231
f675dbe5
CB		 1232 if (
1233#ifndef SECURE_INTERNAL_GETENV
1234 !PL_tainting &&
1235#endif
659ca9ea 1236 (popts = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1237 {
659ca9ea 1238 s = savepv(popts);
74288ac8
GS		 1239 while (isSPACE(*s))
1240 s++;
1241 if (*s == '-' && *(s+1) == 'T')
1242 PL_tainting = TRUE;
1243 else {
1244 while (s && *s) {
4ea8f8fb 1245 char *d;
74288ac8
GS		 1246 while (isSPACE(*s))
1247 s++;
1248 if (*s == '-') {
1249 s++;
1250 if (isSPACE(*s))
1251 continue;
1252 }
4ea8f8fb 1253 d = s;
74288ac8
GS		 1254 if (!*s)
1255 break;
1256 if (!strchr("DIMUdmw", *s))
cea2e8a9 1257 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS		 1258 while (++s && *s) {
1259 if (isSPACE(*s)) {
1260 *s++ = '\0';
1261 break;
1262 }
1263 }
1264 moreswitches(d);
6224f72b 1265 }
6224f72b
GS		 1266 }
1267 }
a0d0e21e 1268
6224f72b
GS		 1269 if (!scriptname)
1270 scriptname = argv[0];
3280af22 1271 if (PL_e_script) {
6224f72b
GS		 1272 argc++,argv--;
1273 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1274 }
1275 else if (scriptname == Nullch) {
1276#ifdef MSDOS
1277 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1278 moreswitches("h");
1279#endif
1280 scriptname = "-";
1281 }
1282
1283 init_perllib();
1284
1285 open_script(scriptname,dosearch,sv,&fdscript);
1286
1287 validate_suid(validarg, scriptname,fdscript);
1288
64ca3a65 1289#ifndef PERL_MICRO
0b5b802d
GS		 1290#if defined(SIGCHLD) || defined(SIGCLD)
1291 {
1292#ifndef SIGCHLD
1293# define SIGCHLD SIGCLD
1294#endif
1295 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1296 if (sigstate == SIG_IGN) {
1297 if (ckWARN(WARN_SIGNAL))
1298 Perl_warner(aTHX_ WARN_SIGNAL,
1299 "Can't ignore signal CHLD, forcing to default");
1300 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1301 }
1302 }
1303#endif
64ca3a65 1304#endif
0b5b802d 1305
bf4acbe4
GS		 1306#ifdef MACOS_TRADITIONAL
1307 if (PL_doextract || gMacPerl_AlwaysExtract) {
1308#else
f4c556ac 1309 if (PL_doextract) {
bf4acbe4 1310#endif
6224f72b 1311 find_beginning();
f4c556ac
GS		 1312 if (cddir && PerlDir_chdir(cddir) < 0)
1313 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1314
1315 }
6224f72b 1316
3280af22
NIS		 1317 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1318 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1319 CvUNIQUE_on(PL_compcv);
1320
1321 PL_comppad = newAV();
1322 av_push(PL_comppad, Nullsv);
1323 PL_curpad = AvARRAY(PL_comppad);
1324 PL_comppad_name = newAV();
1325 PL_comppad_name_fill = 0;
1326 PL_min_intro_pending = 0;
1327 PL_padix = 0;
6224f72b 1328#ifdef USE_THREADS
79cb57f6 1329 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS		 1330 PL_curpad[0] = (SV*)newAV();
1331 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1332 CvOWNER(PL_compcv) = 0;
1333 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1334 MUTEX_INIT(CvMUTEXP(PL_compcv));
6224f72b
GS		 1335#endif /* USE_THREADS */
1336
1337 comppadlist = newAV();
1338 AvREAL_off(comppadlist);
3280af22
NIS		 1339 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1340 av_store(comppadlist, 1, (SV*)PL_comppad);
1341 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1342
0c4f7ff0 1343 boot_core_PerlIO();
6224f72b 1344 boot_core_UNIVERSAL();
9a34ef1d 1345#ifndef PERL_MICRO
09bef843 1346 boot_core_xsutils();
9a34ef1d 1347#endif
6224f72b
GS		 1348
1349 if (xsinit)
0cb96387 1350 (*xsinit)(aTHXo); /* in case linked C routines want magical variables */
64ca3a65 1351#ifndef PERL_MICRO
ed79a026 1352#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1353 init_os_extras();
6224f72b 1354#endif
64ca3a65 1355#endif
6224f72b 1356
29209bc5 1357#ifdef USE_SOCKS
1b9c9cf5
DH		 1358# ifdef HAS_SOCKS5_INIT
1359 socks5_init(argv[0]);
1360# else
29209bc5 1361 SOCKSinit(argv[0]);
1b9c9cf5 1362# endif
ac27b0f5 1363#endif
29209bc5 1364
6224f72b
GS		 1365 init_predump_symbols();
1366 /* init_postdump_symbols not currently designed to be called */
1367 /* more than once (ENV isn't cleared first, for example) */
1368 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1369 if (!PL_do_undump)
6224f72b
GS		 1370 init_postdump_symbols(argc,argv,env);
1371
1372 init_lexer();
1373
1374 /* now parse the script */
1375
1376 SETERRNO(0,SS$_NORMAL);
3280af22 1377 PL_error_count = 0;
bf4acbe4
GS		 1378#ifdef MACOS_TRADITIONAL
1379 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1380 if (PL_minus_c)
1381 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1382 else {
1383 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1384 MacPerl_MPWFileName(PL_origfilename));
1385 }
1386 }
1387#else
3280af22
NIS		 1388 if (yyparse() || PL_error_count) {
1389 if (PL_minus_c)
cea2e8a9 1390 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1391 else {
cea2e8a9 1392 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1393 PL_origfilename);
6224f72b
GS		 1394 }
1395 }
bf4acbe4 1396#endif
57843af0 1397 CopLINE_set(PL_curcop, 0);
3280af22
NIS		 1398 PL_curstash = PL_defstash;
1399 PL_preprocess = FALSE;
1400 if (PL_e_script) {
1401 SvREFCNT_dec(PL_e_script);
1402 PL_e_script = Nullsv;
6224f72b
GS		 1403 }
1404
1405 /* now that script is parsed, we can modify record separator */
3280af22
NIS		 1406 SvREFCNT_dec(PL_rs);
1407 PL_rs = SvREFCNT_inc(PL_nrs);
864dbfa3 1408 sv_setsv(get_sv("/", TRUE), PL_rs);
3280af22 1409 if (PL_do_undump)
6224f72b
GS		 1410 my_unexec();
1411
57843af0
GS		 1412 if (isWARN_ONCE) {
1413 SAVECOPFILE(PL_curcop);
1414 SAVECOPLINE(PL_curcop);
3280af22 1415 gv_check(PL_defstash);
57843af0 1416 }
6224f72b
GS		 1417
1418 LEAVE;
1419 FREETMPS;
1420
1421#ifdef MYMALLOC
1422 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1423 dump_mstats("after compilation:");
1424#endif
1425
1426 ENTER;
3280af22 1427 PL_restartop = 0;
312caa8e 1428 return NULL;
6224f72b
GS		 1429}
1430
954c1994
GS		 1431/*
1432=for apidoc perl_run
1433
1434Tells a Perl interpreter to run. See L<perlembed>.
1435
1436=cut
1437*/
1438
6224f72b 1439int
0cb96387 1440perl_run(pTHXx)
6224f72b 1441{
6224f72b 1442 I32 oldscope;
14dd3ad8 1443 int ret = 0;
db36c5a1 1444 dJMPENV;
cea2e8a9
GS		 1445#ifdef USE_THREADS
1446 dTHX;
1447#endif
6224f72b 1448
3280af22 1449 oldscope = PL_scopestack_ix;
6224f72b 1450
14dd3ad8 1451#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1452 redo_body:
14dd3ad8
GS		 1453 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1454#else
1455 JMPENV_PUSH(ret);
1456#endif
6224f72b
GS		 1457 switch (ret) {
1458 case 1:
1459 cxstack_ix = -1; /* start context stack again */
312caa8e 1460 goto redo_body;
14dd3ad8
GS		 1461 case 0: /* normal completion */
1462#ifndef PERL_FLEXIBLE_EXCEPTIONS
1463 redo_body:
1464 run_body(oldscope);
1465#endif
1466 /* FALL THROUGH */
1467 case 2: /* my_exit() */
3280af22 1468 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1469 LEAVE;
1470 FREETMPS;
3280af22 1471 PL_curstash = PL_defstash;
865be832 1472 if (PL_endav && !PL_minus_c)
3280af22 1473 call_list(oldscope, PL_endav);
6224f72b
GS		 1474#ifdef MYMALLOC
1475 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1476 dump_mstats("after execution: ");
1477#endif
14dd3ad8
GS		 1478 ret = STATUS_NATIVE_EXPORT;
1479 break;
6224f72b 1480 case 3:
312caa8e
CS		 1481 if (PL_restartop) {
1482 POPSTACK_TO(PL_mainstack);
1483 goto redo_body;
6224f72b 1484 }
bf49b057 1485 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1486 FREETMPS;
14dd3ad8
GS		 1487 ret = 1;
1488 break;
6224f72b
GS		 1489 }
1490
14dd3ad8
GS		 1491 JMPENV_POP;
1492 return ret;
312caa8e
CS		 1493}
1494
14dd3ad8 1495#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1496STATIC void *
14dd3ad8 1497S_vrun_body(pTHX_ va_list args)
312caa8e 1498{
312caa8e
CS		 1499 I32 oldscope = va_arg(args, I32);
1500
14dd3ad8
GS		 1501 return run_body(oldscope);
1502}
1503#endif
1504
1505
1506STATIC void *
1507S_run_body(pTHX_ I32 oldscope)
1508{
6224f72b 1509 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1510 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1511
3280af22 1512 if (!PL_restartop) {
6224f72b
GS		 1513 DEBUG_x(dump_all());
1514 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH		 1515 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1516 PTR2UV(thr)));
6224f72b 1517
3280af22 1518 if (PL_minus_c) {
bf4acbe4
GS		 1519#ifdef MACOS_TRADITIONAL
1520 PerlIO_printf(Perl_error_log, "%s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
1521#else
bf49b057 1522 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1523#endif
6224f72b
GS		 1524 my_exit(0);
1525 }
3280af22 1526 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1527 sv_setiv(PL_DBsingle, 1);
3280af22
NIS		 1528 if (PL_initav)
1529 call_list(oldscope, PL_initav);
6224f72b
GS		 1530 }
1531
1532 /* do it */
1533
3280af22 1534 if (PL_restartop) {
533c011a 1535 PL_op = PL_restartop;
3280af22 1536 PL_restartop = 0;
cea2e8a9 1537 CALLRUNOPS(aTHX);
6224f72b 1538 }
3280af22
NIS		 1539 else if (PL_main_start) {
1540 CvDEPTH(PL_main_cv) = 1;
533c011a 1541 PL_op = PL_main_start;
cea2e8a9 1542 CALLRUNOPS(aTHX);
6224f72b
GS		 1543 }
1544
f6b3007c
JH		 1545 my_exit(0);
1546 /* NOTREACHED */
312caa8e 1547 return NULL;
6224f72b
GS		 1548}
1549
954c1994
GS		 1550/*
1551=for apidoc p||get_sv
1552
1553Returns the SV of the specified Perl scalar. If C<create> is set and the
1554Perl variable does not exist then it will be created. If C<create> is not
1555set and the variable does not exist then NULL is returned.
1556
1557=cut
1558*/
1559
6224f72b 1560SV*
864dbfa3 1561Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS		 1562{
1563 GV *gv;
1564#ifdef USE_THREADS
1565 if (name[1] == '\0' && !isALPHA(name[0])) {
1566 PADOFFSET tmp = find_threadsv(name);
411caa50 1567 if (tmp != NOT_IN_PAD)
6224f72b 1568 return THREADSV(tmp);
6224f72b
GS		 1569 }
1570#endif /* USE_THREADS */
1571 gv = gv_fetchpv(name, create, SVt_PV);
1572 if (gv)
1573 return GvSV(gv);
1574 return Nullsv;
1575}
1576
954c1994
GS		 1577/*
1578=for apidoc p||get_av
1579
1580Returns the AV of the specified Perl array. If C<create> is set and the
1581Perl variable does not exist then it will be created. If C<create> is not
1582set and the variable does not exist then NULL is returned.
1583
1584=cut
1585*/
1586
6224f72b 1587AV*
864dbfa3 1588Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS		 1589{
1590 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1591 if (create)
1592 return GvAVn(gv);
1593 if (gv)
1594 return GvAV(gv);
1595 return Nullav;
1596}
1597
954c1994
GS		 1598/*
1599=for apidoc p||get_hv
1600
1601Returns the HV of the specified Perl hash. If C<create> is set and the
1602Perl variable does not exist then it will be created. If C<create> is not
1603set and the variable does not exist then NULL is returned.
1604
1605=cut
1606*/
1607
6224f72b 1608HV*
864dbfa3 1609Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1610{
a0d0e21e
LW		 1611 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1612 if (create)
1613 return GvHVn(gv);
1614 if (gv)
1615 return GvHV(gv);
1616 return Nullhv;
1617}
1618
954c1994
GS		 1619/*
1620=for apidoc p||get_cv
1621
1622Returns the CV of the specified Perl subroutine. If C<create> is set and
1623the Perl subroutine does not exist then it will be declared (which has the
1624same effect as saying C<sub name;>). If C<create> is not set and the
1625subroutine does not exist then NULL is returned.
1626
1627=cut
1628*/
1629
a0d0e21e 1630CV*
864dbfa3 1631Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW		 1632{
1633 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1634 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS		 1635 /* XXX this is probably not what they think they're getting.
1636 * It has the same effect as "sub name;", i.e. just a forward
1637 * declaration! */
8ebc5c01 1638 if (create && !GvCVu(gv))
774d564b 1639 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1640 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1641 Nullop,
a0d0e21e
LW		 1642 Nullop);
1643 if (gv)
8ebc5c01 1644 return GvCVu(gv);
a0d0e21e
LW		 1645 return Nullcv;
1646}
1647
79072805
LW		 1648/* Be sure to refetch the stack pointer after calling these routines. */
1649
954c1994
GS		 1650/*
1651=for apidoc p||call_argv
1652
1653Performs a callback to the specified Perl sub. See L<perlcall>.
1654
1655=cut
1656*/
1657
a0d0e21e 1658I32
864dbfa3 1659Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1660
8ac85365
NIS		 1661 /* See G_* flags in cop.h */
1662 /* null terminated arg list */
8990e307 1663{
a0d0e21e 1664 dSP;
8990e307 1665
924508f0 1666 PUSHMARK(SP);
a0d0e21e 1667 if (argv) {
8990e307 1668 while (*argv) {
a0d0e21e 1669 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW		 1670 argv++;
1671 }
a0d0e21e 1672 PUTBACK;
8990e307 1673 }
864dbfa3 1674 return call_pv(sub_name, flags);
8990e307
LW		 1675}
1676
954c1994
GS		 1677/*
1678=for apidoc p||call_pv
1679
1680Performs a callback to the specified Perl sub. See L<perlcall>.
1681
1682=cut
1683*/
1684
a0d0e21e 1685I32
864dbfa3 1686Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS		 1687 /* name of the subroutine */
1688 /* See G_* flags in cop.h */
a0d0e21e 1689{
864dbfa3 1690 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW		 1691}
1692
954c1994
GS		 1693/*
1694=for apidoc p||call_method
1695
1696Performs a callback to the specified Perl method. The blessed object must
1697be on the stack. See L<perlcall>.
1698
1699=cut
1700*/
1701
a0d0e21e 1702I32
864dbfa3 1703Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS		 1704 /* name of the subroutine */
1705 /* See G_* flags in cop.h */
a0d0e21e 1706{
968b3946 1707 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW		 1708}
1709
1710/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS		 1711/*
1712=for apidoc p||call_sv
1713
1714Performs a callback to the Perl sub whose name is in the SV. See
1715L<perlcall>.
1716
1717=cut
1718*/
1719
a0d0e21e 1720I32
864dbfa3 1721Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1722 /* See G_* flags in cop.h */
a0d0e21e 1723{
924508f0 1724 dSP;
a0d0e21e 1725 LOGOP myop; /* fake syntax tree node */
968b3946 1726 UNOP method_op;
aa689395 1727 I32 oldmark;
13689cfe 1728 volatile I32 retval = 0;
a0d0e21e 1729 I32 oldscope;
54310121 1730 bool oldcatch = CATCH_GET;
6224f72b 1731 int ret;
533c011a 1732 OP* oldop = PL_op;
db36c5a1 1733 dJMPENV;
1e422769 1734
a0d0e21e
LW		 1735 if (flags & G_DISCARD) {
1736 ENTER;
1737 SAVETMPS;
1738 }
1739
aa689395 1740 Zero(&myop, 1, LOGOP);
54310121 1741 myop.op_next = Nullop;
f51d4af5 1742 if (!(flags & G_NOARGS))
aa689395 1743 myop.op_flags |= OPf_STACKED;
54310121 1744 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1745 (flags & G_ARRAY) ? OPf_WANT_LIST :
1746 OPf_WANT_SCALAR);
462e5cf6 1747 SAVEOP();
533c011a 1748 PL_op = (OP*)&myop;
aa689395 1749
3280af22
NIS		 1750 EXTEND(PL_stack_sp, 1);
1751 *++PL_stack_sp = sv;
aa689395 1752 oldmark = TOPMARK;
3280af22 1753 oldscope = PL_scopestack_ix;
a0d0e21e 1754
3280af22 1755 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1756 /* Handle first BEGIN of -d. */
3280af22 1757 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24 1758 /* Try harder, since this may have been a sighandler, thus
1759 * curstash may be meaningless. */
3280af22 1760 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1761 && !(flags & G_NODEBUG))
533c011a 1762 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1763
968b3946
GS		 1764 if (flags & G_METHOD) {
1765 Zero(&method_op, 1, UNOP);
1766 method_op.op_next = PL_op;
1767 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1768 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1769 PL_op = (OP*)&method_op;
968b3946
GS		 1770 }
1771
312caa8e 1772 if (!(flags & G_EVAL)) {
0cdb2077 1773 CATCH_SET(TRUE);
14dd3ad8 1774 call_body((OP*)&myop, FALSE);
312caa8e 1775 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1776 CATCH_SET(oldcatch);
312caa8e
CS		 1777 }
1778 else {
d78bda3d 1779 myop.op_other = (OP*)&myop;
3280af22 1780 PL_markstack_ptr--;
4633a7c4
LW		 1781 /* we're trying to emulate pp_entertry() here */
1782 {
c09156bb 1783 register PERL_CONTEXT *cx;
54310121 1784 I32 gimme = GIMME_V;
ac27b0f5 1785
4633a7c4
LW		 1786 ENTER;
1787 SAVETMPS;
ac27b0f5 1788
968b3946 1789 push_return(Nullop);
1d76a5c3 1790 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1791 PUSHEVAL(cx, 0, 0);
533c011a 1792 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1793
faef0170 1794 PL_in_eval = EVAL_INEVAL;
4633a7c4 1795 if (flags & G_KEEPERR)
faef0170 1796 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1797 else
38a03e6e 1798 sv_setpv(ERRSV,"");
4633a7c4 1799 }
3280af22 1800 PL_markstack_ptr++;
a0d0e21e 1801
14dd3ad8
GS		 1802#ifdef PERL_FLEXIBLE_EXCEPTIONS
1803 redo_body:
1804 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1805 (OP*)&myop, FALSE);
14dd3ad8
GS		 1806#else
1807 JMPENV_PUSH(ret);
1808#endif
6224f72b
GS		 1809 switch (ret) {
1810 case 0:
14dd3ad8
GS		 1811#ifndef PERL_FLEXIBLE_EXCEPTIONS
1812 redo_body:
1813 call_body((OP*)&myop, FALSE);
1814#endif
312caa8e
CS		 1815 retval = PL_stack_sp - (PL_stack_base + oldmark);
1816 if (!(flags & G_KEEPERR))
1817 sv_setpv(ERRSV,"");
a0d0e21e 1818 break;
6224f72b 1819 case 1:
f86702cc 1820 STATUS_ALL_FAILURE;
a0d0e21e 1821 /* FALL THROUGH */
6224f72b 1822 case 2:
a0d0e21e 1823 /* my_exit() was called */
3280af22 1824 PL_curstash = PL_defstash;
a0d0e21e 1825 FREETMPS;
14dd3ad8 1826 JMPENV_POP;
cc3604b1 1827 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1828 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1829 my_exit_jump();
a0d0e21e 1830 /* NOTREACHED */
6224f72b 1831 case 3:
3280af22 1832 if (PL_restartop) {
533c011a 1833 PL_op = PL_restartop;
3280af22 1834 PL_restartop = 0;
312caa8e 1835 goto redo_body;
a0d0e21e 1836 }
3280af22 1837 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1838 if (flags & G_ARRAY)
1839 retval = 0;
1840 else {
1841 retval = 1;
3280af22 1842 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1843 }
312caa8e 1844 break;
a0d0e21e 1845 }
a0d0e21e 1846
3280af22 1847 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW		 1848 SV **newsp;
1849 PMOP *newpm;
1850 I32 gimme;
c09156bb 1851 register PERL_CONTEXT *cx;
a0a2876f
LW		 1852 I32 optype;
1853
1854 POPBLOCK(cx,newpm);
1855 POPEVAL(cx);
1856 pop_return();
3280af22 1857 PL_curpm = newpm;
a0a2876f 1858 LEAVE;
a0d0e21e 1859 }
14dd3ad8 1860 JMPENV_POP;
a0d0e21e 1861 }
1e422769 1862
a0d0e21e 1863 if (flags & G_DISCARD) {
3280af22 1864 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1865 retval = 0;
1866 FREETMPS;
1867 LEAVE;
1868 }
533c011a 1869 PL_op = oldop;
a0d0e21e
LW		 1870 return retval;
1871}
1872
14dd3ad8 1873#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1874STATIC void *
14dd3ad8 1875S_vcall_body(pTHX_ va_list args)
312caa8e
CS		 1876{
1877 OP *myop = va_arg(args, OP*);
1878 int is_eval = va_arg(args, int);
1879
14dd3ad8 1880 call_body(myop, is_eval);
312caa8e
CS		 1881 return NULL;
1882}
14dd3ad8 1883#endif
312caa8e
CS		 1884
1885STATIC void
14dd3ad8 1886S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1887{
312caa8e
CS		 1888 if (PL_op == myop) {
1889 if (is_eval)
f807eda9 1890 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1891 else
f807eda9 1892 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS		 1893 }
1894 if (PL_op)
cea2e8a9 1895 CALLRUNOPS(aTHX);
312caa8e
CS		 1896}
1897
6e72f9df 1898/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1899
954c1994
GS		 1900/*
1901=for apidoc p||eval_sv
1902
1903Tells Perl to C<eval> the string in the SV.
1904
1905=cut
1906*/
1907
a0d0e21e 1908I32
864dbfa3 1909Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1910
8ac85365 1911 /* See G_* flags in cop.h */
a0d0e21e 1912{
924508f0 1913 dSP;
a0d0e21e 1914 UNOP myop; /* fake syntax tree node */
8fa7f367 1915 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1916 volatile I32 retval = 0;
4633a7c4 1917 I32 oldscope;
6224f72b 1918 int ret;
533c011a 1919 OP* oldop = PL_op;
db36c5a1 1920 dJMPENV;
84902520 1921
4633a7c4
LW		 1922 if (flags & G_DISCARD) {
1923 ENTER;
1924 SAVETMPS;
1925 }
1926
462e5cf6 1927 SAVEOP();
533c011a
NIS		 1928 PL_op = (OP*)&myop;
1929 Zero(PL_op, 1, UNOP);
3280af22
NIS		 1930 EXTEND(PL_stack_sp, 1);
1931 *++PL_stack_sp = sv;
1932 oldscope = PL_scopestack_ix;
79072805 1933
4633a7c4
LW		 1934 if (!(flags & G_NOARGS))
1935 myop.op_flags = OPf_STACKED;
79072805 1936 myop.op_next = Nullop;
6e72f9df 1937 myop.op_type = OP_ENTEREVAL;
54310121 1938 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1939 (flags & G_ARRAY) ? OPf_WANT_LIST :
1940 OPf_WANT_SCALAR);
6e72f9df 1941 if (flags & G_KEEPERR)
1942 myop.op_flags |= OPf_SPECIAL;
4633a7c4 1943
14dd3ad8 1944#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1945 redo_body:
14dd3ad8 1946 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1947 (OP*)&myop, TRUE);
14dd3ad8
GS		 1948#else
1949 JMPENV_PUSH(ret);
1950#endif
6224f72b
GS		 1951 switch (ret) {
1952 case 0:
14dd3ad8
GS		 1953#ifndef PERL_FLEXIBLE_EXCEPTIONS
1954 redo_body:
1955 call_body((OP*)&myop,TRUE);
1956#endif
312caa8e
CS		 1957 retval = PL_stack_sp - (PL_stack_base + oldmark);
1958 if (!(flags & G_KEEPERR))
1959 sv_setpv(ERRSV,"");
4633a7c4 1960 break;
6224f72b 1961 case 1:
f86702cc 1962 STATUS_ALL_FAILURE;
4633a7c4 1963 /* FALL THROUGH */
6224f72b 1964 case 2:
4633a7c4 1965 /* my_exit() was called */
3280af22 1966 PL_curstash = PL_defstash;
4633a7c4 1967 FREETMPS;
14dd3ad8 1968 JMPENV_POP;
cc3604b1 1969 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1970 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1971 my_exit_jump();
4633a7c4 1972 /* NOTREACHED */
6224f72b 1973 case 3:
3280af22 1974 if (PL_restartop) {
533c011a 1975 PL_op = PL_restartop;
3280af22 1976 PL_restartop = 0;
312caa8e 1977 goto redo_body;
4633a7c4 1978 }
3280af22 1979 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 1980 if (flags & G_ARRAY)
1981 retval = 0;
1982 else {
1983 retval = 1;
3280af22 1984 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 1985 }
312caa8e 1986 break;
4633a7c4
LW		 1987 }
1988
14dd3ad8 1989 JMPENV_POP;
4633a7c4 1990 if (flags & G_DISCARD) {
3280af22 1991 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 1992 retval = 0;
1993 FREETMPS;
1994 LEAVE;
1995 }
533c011a 1996 PL_op = oldop;
4633a7c4
LW		 1997 return retval;
1998}
1999
954c1994
GS		 2000/*
2001=for apidoc p||eval_pv
2002
2003Tells Perl to C<eval> the given string and return an SV* result.
2004
2005=cut
2006*/
2007
137443ea 2008SV*
864dbfa3 2009Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 2010{
2011 dSP;
2012 SV* sv = newSVpv(p, 0);
2013
864dbfa3 2014 eval_sv(sv, G_SCALAR);
137443ea 2015 SvREFCNT_dec(sv);
2016
2017 SPAGAIN;
2018 sv = POPs;
2019 PUTBACK;
2020
2d8e6c8d
GS		 2021 if (croak_on_error && SvTRUE(ERRSV)) {
2022 STRLEN n_a;
cea2e8a9 2023 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2024 }
137443ea 2025
2026 return sv;
2027}
2028
4633a7c4
LW		 2029/* Require a module. */
2030
954c1994
GS		 2031/*
2032=for apidoc p||require_pv
2033
7d3fb230
BS		 2034Tells Perl to C<require> the file named by the string argument. It is
2035analogous to the Perl code C<eval "require '$file'">. It's even
2036implemented that way; consider using Perl_load_module instead.
954c1994 2037
7d3fb230 2038=cut */
954c1994 2039
4633a7c4 2040void
864dbfa3 2041Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2042{
d3acc0f7
JP		 2043 SV* sv;
2044 dSP;
e788e7d3 2045 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP		 2046 PUTBACK;
2047 sv = sv_newmortal();
4633a7c4
LW		 2048 sv_setpv(sv, "require '");
2049 sv_catpv(sv, pv);
2050 sv_catpv(sv, "'");
864dbfa3 2051 eval_sv(sv, G_DISCARD);
d3acc0f7
JP		 2052 SPAGAIN;
2053 POPSTACK;
79072805
LW		 2054}
2055
79072805 2056void
864dbfa3 2057Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW		 2058{
2059 register GV *gv;
2060
155aba94 2061 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2062 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW		 2063}
2064
76e3520e 2065STATIC void
cea2e8a9 2066S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2067{
ab821d7f 2068 /* This message really ought to be max 23 lines.
75c72d73 2069 * Removed -h because the user already knows that option. Others? */
fb73857a 2070
76e3520e 2071 static char *usage_msg[] = {
fb73857a 2072"-0[octal] specify record separator (\\0, if no argument)",
2073"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2074"-C enable native wide character system interfaces",
1950ee41 2075"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS		 2076"-d[:debugger] run program under debugger",
2077"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2078"-e 'command' one line of program (several -e's allowed, omit programfile)",
2079"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2080"-i[extension] edit <> files in place (makes backup if extension supplied)",
2081"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2082"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS		 2083"-[mM][-]module execute `use/no module...' before executing program",
2084"-n assume 'while (<>) { ... }' loop around program",
2085"-p assume loop like -n but print line also, like sed",
2086"-P run program through C preprocessor before compilation",
2087"-s enable rudimentary parsing for switches after programfile",
2088"-S look for programfile using PATH environment variable",
2089"-T enable tainting checks",
2090"-u dump core after parsing program",
fb73857a 2091"-U allow unsafe operations",
aac3bd0d
GS		 2092"-v print version, subversion (includes VERY IMPORTANT perl info)",
2093"-V[:variable] print configuration summary (or a single Config.pm variable)",
2094"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS		 2095"-W enable all warnings",
2096"-X disable all warnings",
fb73857a 2097"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2098"\n",
2099NULL
2100};
76e3520e 2101 char **p = usage_msg;
fb73857a 2102
b0e47665
GS		 2103 PerlIO_printf(PerlIO_stdout(),
2104 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2105 name);
fb73857a 2106 while (*p)
b0e47665 2107 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW		 2108}
2109
79072805
LW		 2110/* This routine handles any switches that can be given during run */
2111
2112char *
864dbfa3 2113Perl_moreswitches(pTHX_ char *s)
79072805 2114{
ba210ebe 2115 STRLEN numlen;
c07a80fd 2116 U32 rschar;
79072805
LW		 2117
2118 switch (*s) {
2119 case '0':
a863c7d1 2120 {
b21ed0a9 2121 numlen = 0; /* disallow underscores */
dff6d3cd 2122 rschar = (U32)scan_oct(s, 4, &numlen);
3280af22 2123 SvREFCNT_dec(PL_nrs);
c07a80fd 2124 if (rschar & ~((U8)~0))
3280af22 2125 PL_nrs = &PL_sv_undef;
c07a80fd 2126 else if (!rschar && numlen >= 2)
79cb57f6 2127 PL_nrs = newSVpvn("", 0);
c07a80fd 2128 else {
2129 char ch = rschar;
79cb57f6 2130 PL_nrs = newSVpvn(&ch, 1);
79072805
LW		 2131 }
2132 return s + numlen;
a863c7d1 2133 }
46487f74
GS		 2134 case 'C':
2135 PL_widesyscalls = TRUE;
2136 s++;
2137 return s;
2304df62 2138 case 'F':
3280af22
NIS		 2139 PL_minus_F = TRUE;
2140 PL_splitstr = savepv(s + 1);
2304df62
AD		 2141 s += strlen(s);
2142 return s;
79072805 2143 case 'a':
3280af22 2144 PL_minus_a = TRUE;
79072805
LW		 2145 s++;
2146 return s;
2147 case 'c':
3280af22 2148 PL_minus_c = TRUE;
79072805
LW		 2149 s++;
2150 return s;
2151 case 'd':
bbce6d69 2152 forbid_setid("-d");
4633a7c4 2153 s++;
70c94a19
RR		 2154 /* The following permits -d:Mod to accepts arguments following an =
2155 in the fashion that -MSome::Mod does. */
2156 if (*s == ':' || *s == '=') {
2157 char *start;
2158 SV *sv;
2159 sv = newSVpv("use Devel::", 0);
2160 start = ++s;
2161 /* We now allow -d:Module=Foo,Bar */
2162 while(isALNUM(*s) || *s==':') ++s;
2163 if (*s != '=')
2164 sv_catpv(sv, start);
2165 else {
2166 sv_catpvn(sv, start, s-start);
2167 sv_catpv(sv, " split(/,/,q{");
2168 sv_catpv(sv, ++s);
2169 sv_catpv(sv, "})");
2170 }
4633a7c4 2171 s += strlen(s);
70c94a19 2172 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2173 }
ed094faf 2174 if (!PL_perldb) {
3280af22 2175 PL_perldb = PERLDB_ALL;
a0d0e21e 2176 init_debugger();
ed094faf 2177 }
79072805
LW		 2178 return s;
2179 case 'D':
0453d815 2180 {
79072805 2181#ifdef DEBUGGING
bbce6d69 2182 forbid_setid("-D");
79072805 2183 if (isALPHA(s[1])) {
04932ac8
DM		 2184 /* if adding extra options, remember to update DEBUG_MASK */
2185 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW		 2186 char *d;
2187
93a17b20 2188 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2189 PL_debug |= 1 << (d - debopts);
79072805
LW		 2190 }
2191 else {
3280af22 2192 PL_debug = atoi(s+1);
79072805
LW		 2193 for (s++; isDIGIT(*s); s++) ;
2194 }
aea4f609 2195 PL_debug |= DEBUG_TOP_FLAG;
79072805 2196#else
0453d815
PM		 2197 if (ckWARN_d(WARN_DEBUGGING))
2198 Perl_warner(aTHX_ WARN_DEBUGGING,
2199 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2200 for (s++; isALNUM(*s); s++) ;
79072805
LW		 2201#endif
2202 /*SUPPRESS 530*/
2203 return s;
0453d815 2204 }
4633a7c4 2205 case 'h':
ac27b0f5 2206 usage(PL_origargv[0]);
6ad3d225 2207 PerlProc_exit(0);
79072805 2208 case 'i':
3280af22
NIS		 2209 if (PL_inplace)
2210 Safefree(PL_inplace);
2211 PL_inplace = savepv(s+1);
79072805 2212 /*SUPPRESS 530*/
3280af22 2213 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2214 if (*s) {
fb73857a 2215 *s++ = '\0';
7b8d334a
GS		 2216 if (*s == '-') /* Additional switches on #! line. */
2217 s++;
2218 }
fb73857a 2219 return s;
2220 case 'I': /* -I handled both here and in parse_perl() */
bbce6d69 2221 forbid_setid("-I");
fb73857a 2222 ++s;
2223 while (*s && isSPACE(*s))
2224 ++s;
2225 if (*s) {
774d564b 2226 char *e, *p;
0df16ed7
GS		 2227 p = s;
2228 /* ignore trailing spaces (possibly followed by other switches) */
2229 do {
2230 for (e = p; *e && !isSPACE(*e); e++) ;
2231 p = e;
2232 while (isSPACE(*p))
2233 p++;
2234 } while (*p && *p != '-');
2235 e = savepvn(s, e-s);
9c8a64f0 2236 incpush(e, TRUE, TRUE);
0df16ed7
GS		 2237 Safefree(e);
2238 s = p;
2239 if (*s == '-')
2240 s++;
79072805
LW		 2241 }
2242 else
a67e862a 2243 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2244 return s;
79072805 2245 case 'l':
3280af22 2246 PL_minus_l = TRUE;
79072805 2247 s++;
7889fe52
NIS		 2248 if (PL_ors_sv) {
2249 SvREFCNT_dec(PL_ors_sv);
2250 PL_ors_sv = Nullsv;
2251 }
79072805 2252 if (isDIGIT(*s)) {
7889fe52 2253 PL_ors_sv = newSVpvn("\n",1);
b21ed0a9 2254 numlen = 0; /* disallow underscores */
7889fe52 2255 *SvPVX(PL_ors_sv) = (char)scan_oct(s, 3 + (*s == '0'), &numlen);
79072805
LW		 2256 s += numlen;
2257 }
2258 else {
3280af22 2259 if (RsPARA(PL_nrs)) {
7889fe52
NIS		 2260 PL_ors_sv = newSVpvn("\n\n",2);
2261 }
2262 else {
2263 PL_ors_sv = newSVsv(PL_nrs);
c07a80fd 2264 }
79072805
LW		 2265 }
2266 return s;
1a30305b 2267 case 'M':
bbce6d69 2268 forbid_setid("-M"); /* XXX ? */
1a30305b 2269 /* FALL THROUGH */
2270 case 'm':
bbce6d69 2271 forbid_setid("-m"); /* XXX ? */
1a30305b 2272 if (*++s) {
a5f75d66 2273 char *start;
11343788 2274 SV *sv;
a5f75d66
AD		 2275 char *use = "use ";
2276 /* -M-foo == 'no foo' */
2277 if (*s == '-') { use = "no "; ++s; }
11343788 2278 sv = newSVpv(use,0);
a5f75d66 2279 start = s;
1a30305b 2280 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd 2281 while(isALNUM(*s) || *s==':') ++s;
2282 if (*s != '=') {
11343788 2283 sv_catpv(sv, start);
c07a80fd 2284 if (*(start-1) == 'm') {
2285 if (*s != '\0')
cea2e8a9 2286 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2287 sv_catpv( sv, " ()");
c07a80fd 2288 }
2289 } else {
6df41af2 2290 if (s == start)
be98fb35
GS		 2291 Perl_croak(aTHX_ "Module name required with -%c option",
2292 s[-1]);
11343788
MB		 2293 sv_catpvn(sv, start, s-start);
2294 sv_catpv(sv, " split(/,/,q{");
2295 sv_catpv(sv, ++s);
2296 sv_catpv(sv, "})");
c07a80fd 2297 }
1a30305b 2298 s += strlen(s);
5c831c24 2299 if (!PL_preambleav)
3280af22
NIS		 2300 PL_preambleav = newAV();
2301 av_push(PL_preambleav, sv);
1a30305b 2302 }
2303 else
cea2e8a9 2304 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2305 return s;
79072805 2306 case 'n':
3280af22 2307 PL_minus_n = TRUE;
79072805
LW		 2308 s++;
2309 return s;
2310 case 'p':
3280af22 2311 PL_minus_p = TRUE;
79072805
LW		 2312 s++;
2313 return s;
2314 case 's':
bbce6d69 2315 forbid_setid("-s");
3280af22 2316 PL_doswitches = TRUE;
79072805
LW		 2317 s++;
2318 return s;
463ee0b2 2319 case 'T':
3280af22 2320 if (!PL_tainting)
cea2e8a9 2321 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW		 2322 s++;
2323 return s;
79072805 2324 case 'u':
bf4acbe4
GS		 2325#ifdef MACOS_TRADITIONAL
2326 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2327#endif
3280af22 2328 PL_do_undump = TRUE;
79072805
LW		 2329 s++;
2330 return s;
2331 case 'U':
3280af22 2332 PL_unsafe = TRUE;
79072805
LW		 2333 s++;
2334 return s;
2335 case 'v':
8e9464f1 2336#if !defined(DGUX)
b0e47665 2337 PerlIO_printf(PerlIO_stdout(),
d2560b70 2338 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2339 PL_patchlevel, ARCHNAME));
8e9464f1
JH		 2340#else /* DGUX */
2341/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2342 PerlIO_printf(PerlIO_stdout(),
2343 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2344 PerlIO_printf(PerlIO_stdout(),
2345 Perl_form(aTHX_ " built under %s at %s %s\n",
2346 OSNAME, __DATE__, __TIME__));
2347 PerlIO_printf(PerlIO_stdout(),
2348 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2349 OSVERS));
8e9464f1
JH		 2350#endif /* !DGUX */
2351
fb73857a 2352#if defined(LOCAL_PATCH_COUNT)
2353 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS		 2354 PerlIO_printf(PerlIO_stdout(),
2355 "\n(with %d registered patch%s, "
2356 "see perl -V for more detail)",
2357 (int)LOCAL_PATCH_COUNT,
2358 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2359#endif
1a30305b 2360
b0e47665 2361 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2362 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH		 2363#ifdef MACOS_TRADITIONAL
2364 PerlIO_printf(PerlIO_stdout(),
084592ab 2365 "\nMac OS port Copyright (c) 1991-2001, Matthias Neeracher\n");
eae9c151 2366#endif
79072805 2367#ifdef MSDOS
b0e47665
GS		 2368 PerlIO_printf(PerlIO_stdout(),
2369 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff 2370#endif
2371#ifdef DJGPP
b0e47665
GS		 2372 PerlIO_printf(PerlIO_stdout(),
2373 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2374 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2375#endif
79072805 2376#ifdef OS2
b0e47665
GS		 2377 PerlIO_printf(PerlIO_stdout(),
2378 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2379 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2380#endif
79072805 2381#ifdef atarist
b0e47665
GS		 2382 PerlIO_printf(PerlIO_stdout(),
2383 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2384#endif
a3f9223b 2385#ifdef __BEOS__
b0e47665
GS		 2386 PerlIO_printf(PerlIO_stdout(),
2387 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2388#endif
1d84e8df 2389#ifdef MPE
b0e47665 2390 PerlIO_printf(PerlIO_stdout(),
dc22e1c4 2391 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2001\n");
1d84e8df 2392#endif
9d116dd7 2393#ifdef OEMVS
b0e47665
GS		 2394 PerlIO_printf(PerlIO_stdout(),
2395 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2396#endif
495c5fdc 2397#ifdef __VOS__
b0e47665
GS		 2398 PerlIO_printf(PerlIO_stdout(),
2399 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2400#endif
092bebab 2401#ifdef __OPEN_VM
b0e47665
GS		 2402 PerlIO_printf(PerlIO_stdout(),
2403 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2404#endif
a1a0e61e 2405#ifdef POSIX_BC
b0e47665
GS		 2406 PerlIO_printf(PerlIO_stdout(),
2407 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2408#endif
61ae2fbf 2409#ifdef __MINT__
b0e47665
GS		 2410 PerlIO_printf(PerlIO_stdout(),
2411 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2412#endif
f83d2536 2413#ifdef EPOC
b0e47665
GS		 2414 PerlIO_printf(PerlIO_stdout(),
2415 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2416#endif
baed7233
DL		 2417#ifdef BINARY_BUILD_NOTICE
2418 BINARY_BUILD_NOTICE;
2419#endif
b0e47665
GS		 2420 PerlIO_printf(PerlIO_stdout(),
2421 "\n\
79072805 2422Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2423GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS		 2424Complete documentation for Perl, including FAQ lists, should be found on\n\
2425this system using `man perl' or `perldoc perl'. If you have access to the\n\
2426Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2427 PerlProc_exit(0);
79072805 2428 case 'w':
599cee73 2429 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2430 PL_dowarn |= G_WARN_ON;
599cee73
PM		 2431 s++;
2432 return s;
2433 case 'W':
ac27b0f5 2434 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
d3a7d8c7 2435 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM		 2436 s++;
2437 return s;
2438 case 'X':
ac27b0f5 2439 PL_dowarn = G_WARN_ALL_OFF;
d3a7d8c7 2440 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW		 2441 s++;
2442 return s;
a0d0e21e 2443 case '*':
79072805
LW		 2444 case ' ':
2445 if (s[1] == '-') /* Additional switches on #! line. */
2446 return s+2;
2447 break;
a0d0e21e 2448 case '-':
79072805 2449 case 0:
51882d45 2450#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS		 2451 case '\r':
2452#endif
79072805
LW		 2453 case '\n':
2454 case '\t':
2455 break;
aa689395 2456#ifdef ALTERNATE_SHEBANG
2457 case 'S': /* OS/2 needs -S on "extproc" line. */
2458 break;
2459#endif
a0d0e21e 2460 case 'P':
3280af22 2461 if (PL_preprocess)
a0d0e21e
LW		 2462 return s+1;
2463 /* FALL THROUGH */
79072805 2464 default:
cea2e8a9 2465 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW		 2466 }
2467 return Nullch;
2468}
2469
2470/* compliments of Tom Christiansen */
2471
2472/* unexec() can be found in the Gnu emacs distribution */
ee580363 2473/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW		 2474
2475void
864dbfa3 2476Perl_my_unexec(pTHX)
79072805
LW		 2477{
2478#ifdef UNEXEC
46fc3d4c 2479 SV* prog;
2480 SV* file;
ee580363 2481 int status = 1;
79072805
LW		 2482 extern int etext;
2483
ee580363 2484 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2485 sv_catpv(prog, "/perl");
6b88bc9c 2486 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2487 sv_catpv(file, ".perldump");
79072805 2488
ee580363
GS		 2489 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2490 /* unexec prints msg to stderr in case of failure */
6ad3d225 2491 PerlProc_exit(status);
79072805 2492#else
a5f75d66
AD		 2493# ifdef VMS
2494# include <lib$routines.h>
2495 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2496# else
79072805 2497 ABORT(); /* for use with undump */
aa689395 2498# endif
a5f75d66 2499#endif
79072805
LW		 2500}
2501
cb68f92d
GS		 2502/* initialize curinterp */
2503STATIC void
cea2e8a9 2504S_init_interp(pTHX)
cb68f92d
GS		 2505{
2506
066ef5b5 2507#ifdef PERL_OBJECT /* XXX kludge */
cb68f92d 2508#define I_REINIT \
6b88bc9c
GS		 2509 STMT_START { \
2510 PL_chopset = " \n-"; \
2511 PL_copline = NOLINE; \
2512 PL_curcop = &PL_compiling;\
2513 PL_curcopdb = NULL; \
2514 PL_dbargs = 0; \
3967c732 2515 PL_dumpindent = 4; \
6b88bc9c
GS		 2516 PL_laststatval = -1; \
2517 PL_laststype = OP_STAT; \
2518 PL_maxscream = -1; \
2519 PL_maxsysfd = MAXSYSFD; \
2520 PL_statname = Nullsv; \
2521 PL_tmps_floor = -1; \
2522 PL_tmps_ix = -1; \
2523 PL_op_mask = NULL; \
6b88bc9c
GS		 2524 PL_laststatval = -1; \
2525 PL_laststype = OP_STAT; \
2526 PL_mess_sv = Nullsv; \
2527 PL_splitstr = " "; \
2528 PL_generation = 100; \
2529 PL_exitlist = NULL; \
2530 PL_exitlistlen = 0; \
2531 PL_regindent = 0; \
2532 PL_in_clean_objs = FALSE; \
2533 PL_in_clean_all = FALSE; \
2534 PL_profiledata = NULL; \
2535 PL_rsfp = Nullfp; \
2536 PL_rsfp_filters = Nullav; \
24d3c518 2537 PL_dirty = FALSE; \
cb68f92d 2538 } STMT_END
9666903d 2539 I_REINIT;
066ef5b5
GS		 2540#else
2541# ifdef MULTIPLICITY
2542# define PERLVAR(var,type)
51371543 2543# define PERLVARA(var,n,type)
cea2e8a9 2544# if defined(PERL_IMPLICIT_CONTEXT)
54aff467
GS		 2545# if defined(USE_THREADS)
2546# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2547# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
2548# else /* !USE_THREADS */
2549# define PERLVARI(var,type,init) aTHX->var = init;
2550# define PERLVARIC(var,type,init) aTHX->var = init;
2551# endif /* USE_THREADS */
cea2e8a9 2552# else
c5be433b
GS		 2553# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2554# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
cea2e8a9 2555# endif
066ef5b5
GS		 2556# include "intrpvar.h"
2557# ifndef USE_THREADS
2558# include "thrdvar.h"
2559# endif
2560# undef PERLVAR
51371543 2561# undef PERLVARA
066ef5b5
GS		 2562# undef PERLVARI
2563# undef PERLVARIC
3967c732 2564# else
066ef5b5 2565# define PERLVAR(var,type)
51371543 2566# define PERLVARA(var,n,type)
533c011a
NIS		 2567# define PERLVARI(var,type,init) PL_##var = init;
2568# define PERLVARIC(var,type,init) PL_##var = init;
066ef5b5
GS		 2569# include "intrpvar.h"
2570# ifndef USE_THREADS
2571# include "thrdvar.h"
2572# endif
2573# undef PERLVAR
51371543 2574# undef PERLVARA
066ef5b5
GS		 2575# undef PERLVARI
2576# undef PERLVARIC
2577# endif
cb68f92d
GS		 2578#endif
2579
cb68f92d
GS		 2580}
2581
76e3520e 2582STATIC void
cea2e8a9 2583S_init_main_stash(pTHX)
79072805 2584{
463ee0b2 2585 GV *gv;
6e72f9df 2586
2587 /* Note that strtab is a rather special HV. Assumptions are made
2588 about not iterating on it, and not adding tie magic to it.
2589 It is properly deallocated in perl_destruct() */
3280af22 2590 PL_strtab = newHV();
5f08fbcd
GS		 2591#ifdef USE_THREADS
2592 MUTEX_INIT(&PL_strtab_mutex);
2593#endif
3280af22
NIS		 2594 HvSHAREKEYS_off(PL_strtab); /* mandatory */
2595 hv_ksplit(PL_strtab, 512);
ac27b0f5 2596
3280af22 2597 PL_curstash = PL_defstash = newHV();
79cb57f6 2598 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW		 2599 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2600 SvREFCNT_dec(GvHV(gv));
3280af22 2601 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2602 SvREADONLY_on(gv);
3280af22
NIS		 2603 HvNAME(PL_defstash) = savepv("main");
2604 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2605 GvMULTI_on(PL_incgv);
2606 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2607 GvMULTI_on(PL_hintgv);
2608 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2609 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2610 GvMULTI_on(PL_errgv);
2611 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2612 GvMULTI_on(PL_replgv);
cea2e8a9 2613 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB		 2614 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2615 sv_setpvn(ERRSV, "", 0);
3280af22 2616 PL_curstash = PL_defstash;
11faa288 2617 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2618 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2619 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2620 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2621 /* We must init $/ before switches are processed. */
864dbfa3 2622 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW		 2623}
2624
76e3520e 2625STATIC void
cea2e8a9 2626S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2627{
6c4ab083 2628 *fdscript = -1;
79072805 2629
3280af22
NIS		 2630 if (PL_e_script) {
2631 PL_origfilename = savepv("-e");
96436eeb 2632 }
6c4ab083
GS		 2633 else {
2634 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2635 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS		 2636
2637 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2638 char *s = scriptname + 8;
2639 *fdscript = atoi(s);
2640 while (isDIGIT(*s))
2641 s++;
2642 if (*s) {
2643 scriptname = savepv(s + 1);
3280af22
NIS		 2644 Safefree(PL_origfilename);
2645 PL_origfilename = scriptname;
6c4ab083
GS		 2646 }
2647 }
2648 }
2649
f4dd75d9
GS		 2650#ifdef USE_ITHREADS
2651 Safefree(CopFILE(PL_curcop));
2652#else
2653 SvREFCNT_dec(CopFILEGV(PL_curcop));
2654#endif
57843af0 2655 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2656 if (strEQ(PL_origfilename,"-"))
79072805 2657 scriptname = "";
01f988be 2658 if (*fdscript >= 0) {
3280af22 2659 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
96436eeb 2660#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS		 2661 if (PL_rsfp)
2662 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb 2663#endif
2664 }
3280af22 2665 else if (PL_preprocess) {
46fc3d4c 2666 char *cpp_cfg = CPPSTDIN;
79cb57f6 2667 SV *cpp = newSVpvn("",0);
46fc3d4c 2668 SV *cmd = NEWSV(0,0);
2669
2670 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2671 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2672 sv_catpv(cpp, cpp_cfg);
79072805 2673
0df16ed7 2674 sv_catpvn(sv, "-I", 2);
fed7345c 2675 sv_catpv(sv,PRIVLIB_EXP);
46fc3d4c 2676
14953ddc
MB		 2677 DEBUG_P(PerlIO_printf(Perl_debug_log,
2678 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2679 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
52853b95 2680#if defined(MSDOS) || defined(WIN32)
cea2e8a9 2681 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW		 2682sed %s -e \"/^[^#]/b\" \
2683 -e \"/^#[ ]*include[ ]/b\" \
2684 -e \"/^#[ ]*define[ ]/b\" \
2685 -e \"/^#[ ]*if[ ]/b\" \
2686 -e \"/^#[ ]*ifdef[ ]/b\" \
2687 -e \"/^#[ ]*ifndef[ ]/b\" \
2688 -e \"/^#[ ]*else/b\" \
2689 -e \"/^#[ ]*elif[ ]/b\" \
2690 -e \"/^#[ ]*undef[ ]/b\" \
2691 -e \"/^#[ ]*endif/b\" \
2692 -e \"s/^#.*//\" \
894356b3 2693 %s | %"SVf" -C %"SVf" %s",
6b88bc9c 2694 (PL_doextract ? "-e \"1,/^#/d\n\"" : ""),
79072805 2695#else
092bebab 2696# ifdef __OPEN_VM
cea2e8a9 2697 Perl_sv_setpvf(aTHX_ cmd, "\
092bebab
JH		 2698%s %s -e '/^[^#]/b' \
2699 -e '/^#[ ]*include[ ]/b' \
2700 -e '/^#[ ]*define[ ]/b' \
2701 -e '/^#[ ]*if[ ]/b' \
2702 -e '/^#[ ]*ifdef[ ]/b' \
2703 -e '/^#[ ]*ifndef[ ]/b' \
2704 -e '/^#[ ]*else/b' \
2705 -e '/^#[ ]*elif[ ]/b' \
2706 -e '/^#[ ]*undef[ ]/b' \
2707 -e '/^#[ ]*endif/b' \
2708 -e 's/^[ ]*#.*//' \
894356b3 2709 %s | %"SVf" %"SVf" %s",
092bebab 2710# else
cea2e8a9 2711 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW		 2712%s %s -e '/^[^#]/b' \
2713 -e '/^#[ ]*include[ ]/b' \
2714 -e '/^#[ ]*define[ ]/b' \
2715 -e '/^#[ ]*if[ ]/b' \
2716 -e '/^#[ ]*ifdef[ ]/b' \
2717 -e '/^#[ ]*ifndef[ ]/b' \
2718 -e '/^#[ ]*else/b' \
2719 -e '/^#[ ]*elif[ ]/b' \
2720 -e '/^#[ ]*undef[ ]/b' \
2721 -e '/^#[ ]*endif/b' \
2722 -e 's/^[ ]*#.*//' \
894356b3 2723 %s | %"SVf" -C %"SVf" %s",
092bebab 2724# endif
79072805
LW		 2725#ifdef LOC_SED
2726 LOC_SED,
2727#else
2728 "sed",
2729#endif
3280af22 2730 (PL_doextract ? "-e '1,/^#/d\n'" : ""),
79072805 2731#endif
46fc3d4c 2732 scriptname, cpp, sv, CPPMINUS);
3280af22 2733 PL_doextract = FALSE;
79072805 2734#ifdef IAMSUID /* actually, this is caught earlier */
b28d0864 2735 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
79072805 2736#ifdef HAS_SETEUID
b28d0864 2737 (void)seteuid(PL_uid); /* musn't stay setuid root */
79072805
LW		 2738#else
2739#ifdef HAS_SETREUID
b28d0864 2740 (void)setreuid((Uid_t)-1, PL_uid);
85e6fe83
LW		 2741#else
2742#ifdef HAS_SETRESUID
b28d0864 2743 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
79072805 2744#else
b28d0864 2745 PerlProc_setuid(PL_uid);
79072805
LW		 2746#endif
2747#endif
85e6fe83 2748#endif
b28d0864 2749 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2750 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805
LW		 2751 }
2752#endif /* IAMSUID */
3280af22 2753 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c 2754 SvREFCNT_dec(cmd);
2755 SvREFCNT_dec(cpp);
79072805
LW		 2756 }
2757 else if (!*scriptname) {
bbce6d69 2758 forbid_setid("program input from stdin");
3280af22 2759 PL_rsfp = PerlIO_stdin();
79072805 2760 }
96436eeb 2761 else {
3280af22 2762 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
96436eeb 2763#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS		 2764 if (PL_rsfp)
2765 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb 2766#endif
2767 }
3280af22 2768 if (!PL_rsfp) {
13281fa4 2769#ifdef DOSUID
a687059c 2770#ifndef IAMSUID /* in case script is not readable before setuid */
6b88bc9c 2771 if (PL_euid &&
cc49e20b 2772 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
6b88bc9c
GS		 2773 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2774 {
46fc3d4c 2775 /* try again */
a7cb1f99 2776 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 2777 (int)PERL_REVISION, (int)PERL_VERSION,
2778 (int)PERL_SUBVERSION), PL_origargv);
cea2e8a9 2779 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 2780 }
2781#endif
2782#endif
584d69ec
JH		 2783#ifdef IAMSUID
2784 errno = EPERM;
2785 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2786 Strerror(errno));
2787#else
cea2e8a9 2788 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
cc49e20b 2789 CopFILE(PL_curcop), Strerror(errno));
584d69ec 2790#endif
13281fa4 2791 }
79072805 2792}
8d063cd8 2793
7b89560d
JH		 2794/* Mention
2795 * I_SYSSTATVFS HAS_FSTATVFS
2796 * I_SYSMOUNT
c890dc6c 2797 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH		 2798 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2799 * here so that metaconfig picks them up. */
2800
104d25b7 2801#ifdef IAMSUID
864dbfa3 2802STATIC int
e688b231 2803S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2804{
0545a864
JH		 2805 int check_okay = 0; /* able to do all the required sys/libcalls */
2806 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2807/*
ad27e871 2808 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2809 * fstatvfs() is UNIX98.
0545a864 2810 * fstatfs() is 4.3 BSD.
ad27e871 2811 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH		 2812 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2813 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH		 2814 */
2815
6439433f
JH		 2816#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2817
2818# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2819 defined(HAS_FSTATVFS)
2820# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2821 struct statvfs stfs;
6439433f 2822
104d25b7
JH		 2823 check_okay = fstatvfs(fd, &stfs) == 0;
2824 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2825# endif /* fstatvfs */
ac27b0f5 2826
6439433f
JH		 2827# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2828 defined(PERL_MOUNT_NOSUID) && \
2829 defined(HAS_FSTATFS) && \
2830 defined(HAS_STRUCT_STATFS) && \
2831 defined(HAS_STRUCT_STATFS_F_FLAGS)
2832# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2833 struct statfs stfs;
6439433f 2834
104d25b7 2835 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2836 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH		 2837# endif /* fstatfs */
2838
2839# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2840 defined(PERL_MOUNT_NOSUID) && \
2841 defined(HAS_FSTAT) && \
2842 defined(HAS_USTAT) && \
2843 defined(HAS_GETMNT) && \
2844 defined(HAS_STRUCT_FS_DATA) && \
2845 defined(NOSTAT_ONE)
2846# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2847 struct stat fdst;
6439433f 2848
0545a864 2849 if (fstat(fd, &fdst) == 0) {
6439433f
JH		 2850 struct ustat us;
2851 if (ustat(fdst.st_dev, &us) == 0) {
2852 struct fs_data fsd;
2853 /* NOSTAT_ONE here because we're not examining fields which
2854 * vary between that case and STAT_ONE. */
ad27e871 2855 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH		 2856 size_t cmplen = sizeof(us.f_fname);
2857 if (sizeof(fsd.fd_req.path) < cmplen)
2858 cmplen = sizeof(fsd.fd_req.path);
2859 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2860 fdst.st_dev == fsd.fd_req.dev) {
2861 check_okay = 1;
2862 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2863 }
2864 }
2865 }
2866 }
0545a864 2867 }
6439433f
JH		 2868# endif /* fstat+ustat+getmnt */
2869
2870# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2871 defined(HAS_GETMNTENT) && \
2872 defined(HAS_HASMNTOPT) && \
2873 defined(MNTOPT_NOSUID)
2874# define FD_ON_NOSUID_CHECK_OKAY
2875 FILE *mtab = fopen("/etc/mtab", "r");
2876 struct mntent *entry;
2877 struct stat stb, fsb;
104d25b7
JH		 2878
2879 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH		 2880 while (entry = getmntent(mtab)) {
2881 if (stat(entry->mnt_dir, &fsb) == 0
2882 && fsb.st_dev == stb.st_dev)
2883 {
2884 /* found the filesystem */
2885 check_okay = 1;
2886 if (hasmntopt(entry, MNTOPT_NOSUID))
2887 on_nosuid = 1;
2888 break;
2889 } /* A single fs may well fail its stat(). */
2890 }
104d25b7
JH		 2891 }
2892 if (mtab)
6439433f
JH		 2893 fclose(mtab);
2894# endif /* getmntent+hasmntopt */
0545a864 2895
ac27b0f5 2896 if (!check_okay)
0545a864 2897 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH		 2898 return on_nosuid;
2899}
2900#endif /* IAMSUID */
2901
76e3520e 2902STATIC void
cea2e8a9 2903S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2904{
155aba94 2905#ifdef IAMSUID
96436eeb 2906 int which;
155aba94 2907#endif
96436eeb 2908
13281fa4
LW		 2909 /* do we need to emulate setuid on scripts? */
2910
2911 /* This code is for those BSD systems that have setuid #! scripts disabled
2912 * in the kernel because of a security problem. Merely defining DOSUID
2913 * in perl will not fix that problem, but if you have disabled setuid
2914 * scripts in the kernel, this will attempt to emulate setuid and setgid
2915 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW		 2916 * root version must be called suidperl or sperlN.NNN. If regular perl
2917 * discovers that it has opened a setuid script, it calls suidperl with
2918 * the same argv that it had. If suidperl finds that the script it has
2919 * just opened is NOT setuid root, it sets the effective uid back to the
2920 * uid. We don't just make perl setuid root because that loses the
2921 * effective uid we had before invoking perl, if it was different from the
2922 * uid.
13281fa4
LW		 2923 *
2924 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2925 * be defined in suidperl only. suidperl must be setuid root. The
2926 * Configure script will set this up for you if you want it.
2927 */
a687059c 2928
13281fa4 2929#ifdef DOSUID
6e72f9df 2930 char *s, *s2;
a0d0e21e 2931
b28d0864 2932 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2933 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2934 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2935 I32 len;
2d8e6c8d 2936 STRLEN n_a;
13281fa4 2937
a687059c 2938#ifdef IAMSUID
fe14fcc3 2939#ifndef HAS_SETREUID
a687059c
LW		 2940 /* On this access check to make sure the directories are readable,
2941 * there is actually a small window that the user could use to make
2942 * filename point to an accessible directory. So there is a faint
2943 * chance that someone could execute a setuid script down in a
2944 * non-accessible directory. I don't know what to do about that.
2945 * But I don't think it's too important. The manual lies when
2946 * it says access() is useful in setuid programs.
2947 */
cc49e20b 2948 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2949 Perl_croak(aTHX_ "Permission denied");
a687059c
LW		 2950#else
2951 /* If we can swap euid and uid, then we can determine access rights
2952 * with a simple stat of the file, and then compare device and
2953 * inode to make sure we did stat() on the same file we opened.
2954 * Then we just have to make sure he or she can execute it.
2955 */
2956 {
2957 struct stat tmpstatbuf;
2958
85e6fe83
LW		 2959 if (
2960#ifdef HAS_SETREUID
b28d0864 2961 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW		 2962#else
2963# if HAS_SETRESUID
b28d0864 2964 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 2965# endif
85e6fe83 2966#endif
b28d0864 2967 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 2968 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 2969 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 2970 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 2971#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 2972 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 2973 Perl_croak(aTHX_ "Permission denied");
104d25b7 2974#endif
b28d0864
NIS		 2975 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
2976 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
2977 (void)PerlIO_close(PL_rsfp);
cea2e8a9 2978 Perl_croak(aTHX_ "Permission denied\n");
a687059c 2979 }
85e6fe83
LW		 2980 if (
2981#ifdef HAS_SETREUID
b28d0864 2982 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW		 2983#else
2984# if defined(HAS_SETRESUID)
b28d0864 2985 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 2986# endif
85e6fe83 2987#endif
b28d0864 2988 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 2989 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 2990 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 2991 Perl_croak(aTHX_ "Permission denied\n");
a687059c 2992 }
fe14fcc3 2993#endif /* HAS_SETREUID */
a687059c
LW		 2994#endif /* IAMSUID */
2995
b28d0864 2996 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 2997 Perl_croak(aTHX_ "Permission denied");
b28d0864 2998 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 2999 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3000 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3001 CopLINE_inc(PL_curcop);
6b88bc9c 3002 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3003 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3004 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3005 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3006 if (*s == ' ') s++;
45d8adaa 3007 while (!isSPACE(*s)) s++;
2d8e6c8d 3008 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df 3009 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3010 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3011 Perl_croak(aTHX_ "Not a perl script");
a687059c 3012 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW		 3013 /*
3014 * #! arg must be what we saw above. They can invoke it by
3015 * mentioning suidperl explicitly, but they may not add any strange
3016 * arguments beyond what #! says if they do invoke suidperl that way.
3017 */
3018 len = strlen(validarg);
3019 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3020 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3021 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW		 3022
3023#ifndef IAMSUID
b28d0864
NIS		 3024 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3025 PL_euid == PL_statbuf.st_uid)
3026 if (!PL_do_undump)
cea2e8a9 3027 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3028FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3029#endif /* IAMSUID */
13281fa4 3030
b28d0864
NIS		 3031 if (PL_euid) { /* oops, we're not the setuid root perl */
3032 (void)PerlIO_close(PL_rsfp);
13281fa4 3033#ifndef IAMSUID
46fc3d4c 3034 /* try again */
a7cb1f99 3035 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3036 (int)PERL_REVISION, (int)PERL_VERSION,
3037 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3038#endif
cea2e8a9 3039 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 3040 }
3041
b28d0864 3042 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3043#ifdef HAS_SETEGID
b28d0864 3044 (void)setegid(PL_statbuf.st_gid);
a687059c 3045#else
fe14fcc3 3046#ifdef HAS_SETREGID
b28d0864 3047 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW		 3048#else
3049#ifdef HAS_SETRESGID
b28d0864 3050 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3051#else
b28d0864 3052 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW		 3053#endif
3054#endif
85e6fe83 3055#endif
b28d0864 3056 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3057 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3058 }
b28d0864
NIS		 3059 if (PL_statbuf.st_mode & S_ISUID) {
3060 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3061#ifdef HAS_SETEUID
b28d0864 3062 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3063#else
fe14fcc3 3064#ifdef HAS_SETREUID
b28d0864 3065 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW		 3066#else
3067#ifdef HAS_SETRESUID
b28d0864 3068 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3069#else
b28d0864 3070 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW		 3071#endif
3072#endif
85e6fe83 3073#endif
b28d0864 3074 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3075 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3076 }
b28d0864 3077 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3078#ifdef HAS_SETEUID
b28d0864 3079 (void)seteuid((Uid_t)PL_uid);
a687059c 3080#else
fe14fcc3 3081#ifdef HAS_SETREUID
b28d0864 3082 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3083#else
85e6fe83 3084#ifdef HAS_SETRESUID
b28d0864 3085 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3086#else
b28d0864 3087 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3088#endif
a687059c
LW		 3089#endif
3090#endif
b28d0864 3091 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3092 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3093 }
748a9306 3094 init_ids();
b28d0864 3095 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3096 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW		 3097 }
3098#ifdef IAMSUID
6b88bc9c 3099 else if (PL_preprocess)
cea2e8a9 3100 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3101 else if (fdscript >= 0)
cea2e8a9 3102 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3103 else
cea2e8a9 3104 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb 3105
3106 /* We absolutely must clear out any saved ids here, so we */
3107 /* exec the real perl, substituting fd script for scriptname. */
3108 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS		 3109 PerlIO_rewind(PL_rsfp);
3110 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS		 3111 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3112 if (!PL_origargv[which])
cea2e8a9
GS		 3113 Perl_croak(aTHX_ "Permission denied");
3114 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3115 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3116#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3117 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3118#endif
a7cb1f99 3119 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3120 (int)PERL_REVISION, (int)PERL_VERSION,
3121 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3122 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3123#endif /* IAMSUID */
a687059c 3124#else /* !DOSUID */
3280af22 3125 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3126#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS		 3127 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3128 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3129 ||
b28d0864 3130 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3131 )
b28d0864 3132 if (!PL_do_undump)
cea2e8a9 3133 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3134FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3135#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3136 /* not set-id, must be wrapped */
a687059c 3137 }
13281fa4 3138#endif /* DOSUID */
79072805 3139}
13281fa4 3140
76e3520e 3141STATIC void
cea2e8a9 3142S_find_beginning(pTHX)
79072805 3143{
6e72f9df 3144 register char *s, *s2;
33b78306
LW		 3145
3146 /* skip forward in input to the real script? */
3147
bbce6d69 3148 forbid_setid("-x");
bf4acbe4 3149#ifdef MACOS_TRADITIONAL
084592ab 3150 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3151
bf4acbe4
GS		 3152 while (PL_doextract || gMacPerl_AlwaysExtract) {
3153 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3154 if (!gMacPerl_AlwaysExtract)
3155 Perl_croak(aTHX_ "No Perl script found in input\n");
3156
3157 if (PL_doextract) /* require explicit override ? */
3158 if (!OverrideExtract(PL_origfilename))
3159 Perl_croak(aTHX_ "User aborted script\n");
3160 else
3161 PL_doextract = FALSE;
3162
3163 /* Pater peccavi, file does not have #! */
3164 PerlIO_rewind(PL_rsfp);
ac27b0f5 3165
bf4acbe4
GS		 3166 break;
3167 }
3168#else
3280af22
NIS		 3169 while (PL_doextract) {
3170 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3171 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3172#endif
4f0c37ba
IZ		 3173 s2 = s;
3174 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS		 3175 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3176 PL_doextract = FALSE;
6e72f9df 3177 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3178 s2 = s;
3179 while (*s == ' ' || *s == '\t') s++;
3180 if (*s++ == '-') {
3181 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3182 if (strnEQ(s2-4,"perl",4))
3183 /*SUPPRESS 530*/
155aba94
GS		 3184 while ((s = moreswitches(s)))
3185 ;
33b78306 3186 }
95e8664e
CN		 3187#ifdef MACOS_TRADITIONAL
3188 break;
3189#endif
83025b21
LW		 3190 }
3191 }
3192}
3193
afe37c7d 3194
76e3520e 3195STATIC void
cea2e8a9 3196S_init_ids(pTHX)
352d5a3a 3197{
d8eceb89
JH		 3198 PL_uid = PerlProc_getuid();
3199 PL_euid = PerlProc_geteuid();
3200 PL_gid = PerlProc_getgid();
3201 PL_egid = PerlProc_getegid();
748a9306 3202#ifdef VMS
b28d0864
NIS		 3203 PL_uid |= PL_gid << 16;
3204 PL_euid |= PL_egid << 16;
748a9306 3205#endif
3280af22 3206 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3207}
79072805 3208
76e3520e 3209STATIC void
cea2e8a9 3210S_forbid_setid(pTHX_ char *s)
bbce6d69 3211{
3280af22 3212 if (PL_euid != PL_uid)
cea2e8a9 3213 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3214 if (PL_egid != PL_gid)
cea2e8a9 3215 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69 3216}
3217
1ee4443e
IZ		 3218void
3219Perl_init_debugger(pTHX)
748a9306 3220{
1ee4443e
IZ		 3221 HV *ostash = PL_curstash;
3222
3280af22
NIS		 3223 PL_curstash = PL_debstash;
3224 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3225 AvREAL_off(PL_dbargs);
3226 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3227 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3228 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3229 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3230 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3231 sv_setiv(PL_DBsingle, 0);
3280af22 3232 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3233 sv_setiv(PL_DBtrace, 0);
3280af22 3234 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3235 sv_setiv(PL_DBsignal, 0);
1ee4443e 3236 PL_curstash = ostash;
352d5a3a
LW		 3237}
3238
2ce36478
SM		 3239#ifndef STRESS_REALLOC
3240#define REASONABLE(size) (size)
3241#else
3242#define REASONABLE(size) (1) /* unreasonable */
3243#endif
3244
11343788 3245void
cea2e8a9 3246Perl_init_stacks(pTHX)
79072805 3247{
e336de0d 3248 /* start with 128-item stack and 8K cxstack */
3280af22 3249 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3250 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS		 3251 PL_curstackinfo->si_type = PERLSI_MAIN;
3252 PL_curstack = PL_curstackinfo->si_stack;
3253 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3254
3280af22
NIS		 3255 PL_stack_base = AvARRAY(PL_curstack);
3256 PL_stack_sp = PL_stack_base;
3257 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3258
3280af22
NIS		 3259 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3260 PL_tmps_floor = -1;
3261 PL_tmps_ix = -1;
3262 PL_tmps_max = REASONABLE(128);
8990e307 3263
3280af22
NIS		 3264 New(54,PL_markstack,REASONABLE(32),I32);
3265 PL_markstack_ptr = PL_markstack;
3266 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3267
ce2f7c3b 3268 SET_MARK_OFFSET;
e336de0d 3269
3280af22
NIS		 3270 New(54,PL_scopestack,REASONABLE(32),I32);
3271 PL_scopestack_ix = 0;
3272 PL_scopestack_max = REASONABLE(32);
79072805 3273
3280af22
NIS		 3274 New(54,PL_savestack,REASONABLE(128),ANY);
3275 PL_savestack_ix = 0;
3276 PL_savestack_max = REASONABLE(128);
79072805 3277
3280af22
NIS		 3278 New(54,PL_retstack,REASONABLE(16),OP*);
3279 PL_retstack_ix = 0;
3280 PL_retstack_max = REASONABLE(16);
378cc40b 3281}
33b78306 3282
2ce36478
SM		 3283#undef REASONABLE
3284
76e3520e 3285STATIC void
cea2e8a9 3286S_nuke_stacks(pTHX)
6e72f9df 3287{
3280af22
NIS		 3288 while (PL_curstackinfo->si_next)
3289 PL_curstackinfo = PL_curstackinfo->si_next;
3290 while (PL_curstackinfo) {
3291 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3292 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS		 3293 Safefree(PL_curstackinfo->si_cxstack);
3294 Safefree(PL_curstackinfo);
3295 PL_curstackinfo = p;
e336de0d 3296 }
3280af22
NIS		 3297 Safefree(PL_tmps_stack);
3298 Safefree(PL_markstack);
3299 Safefree(PL_scopestack);
3300 Safefree(PL_savestack);
3301 Safefree(PL_retstack);
378cc40b 3302}
33b78306 3303
76e3520e 3304#ifndef PERL_OBJECT
760ac839 3305static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
76e3520e 3306#endif
7aa04957 3307
76e3520e 3308STATIC void
cea2e8a9 3309S_init_lexer(pTHX)
8990e307 3310{
76e3520e
GS		 3311#ifdef PERL_OBJECT
3312 PerlIO *tmpfp;
3313#endif
3280af22
NIS		 3314 tmpfp = PL_rsfp;
3315 PL_rsfp = Nullfp;
3316 lex_start(PL_linestr);
3317 PL_rsfp = tmpfp;
79cb57f6 3318 PL_subname = newSVpvn("main",4);
8990e307
LW		 3319}
3320
76e3520e 3321STATIC void
cea2e8a9 3322S_init_predump_symbols(pTHX)
45d8adaa 3323{
93a17b20 3324 GV *tmpgv;
af8c498a 3325 IO *io;
79072805 3326
864dbfa3 3327 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS		 3328 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3329 GvMULTI_on(PL_stdingv);
af8c498a 3330 io = GvIOp(PL_stdingv);
a04651f4 3331 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3332 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3333 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3334 GvMULTI_on(tmpgv);
af8c498a 3335 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3336
85e6fe83 3337 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3338 GvMULTI_on(tmpgv);
af8c498a 3339 io = GvIOp(tmpgv);
a04651f4 3340 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3341 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3342 setdefout(tmpgv);
adbc6bb1 3343 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3344 GvMULTI_on(tmpgv);
af8c498a 3345 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3346
bf49b057
GS		 3347 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3348 GvMULTI_on(PL_stderrgv);
3349 io = GvIOp(PL_stderrgv);
a04651f4 3350 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3351 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3352 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3353 GvMULTI_on(tmpgv);
af8c498a 3354 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3355
3280af22 3356 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3357
bf4acbe4
GS		 3358 if (PL_osname)
3359 Safefree(PL_osname);
3360 PL_osname = savepv(OSNAME);
79072805 3361}
33b78306 3362
76e3520e 3363STATIC void
cea2e8a9 3364S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
33b78306 3365{
79072805
LW		 3366 char *s;
3367 SV *sv;
3368 GV* tmpgv;
9cbac4c7 3369#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
516a5887 3370 char **dup_env_base = 0;
103a7189 3371 int dup_env_count = 0;
9cbac4c7 3372#endif
fe14fcc3 3373
79072805 3374 argc--,argv++; /* skip name of script */
3280af22 3375 if (PL_doswitches) {
79072805
LW		 3376 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3377 if (!argv[0][1])
3378 break;
379d538a 3379 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW		 3380 argc--,argv++;
3381 break;
3382 }
155aba94 3383 if ((s = strchr(argv[0], '='))) {
79072805 3384 *s++ = '\0';
85e6fe83 3385 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW		 3386 }
3387 else
85e6fe83 3388 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3389 }
79072805 3390 }
3280af22
NIS		 3391 PL_toptarget = NEWSV(0,0);
3392 sv_upgrade(PL_toptarget, SVt_PVFM);
3393 sv_setpvn(PL_toptarget, "", 0);
3394 PL_bodytarget = NEWSV(0,0);
3395 sv_upgrade(PL_bodytarget, SVt_PVFM);
3396 sv_setpvn(PL_bodytarget, "", 0);
3397 PL_formtarget = PL_bodytarget;
79072805 3398
bbce6d69 3399 TAINT;
155aba94 3400 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS		 3401#ifdef MACOS_TRADITIONAL
3402 /* $0 is not majick on a Mac */
3403 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3404#else
3280af22 3405 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3406 magicname("0", "0", 1);
bf4acbe4 3407#endif
79072805 3408 }
155aba94 3409 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV)))
ed344e4f 3410#ifdef OS2
23da6c43 3411 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
ed344e4f 3412#else
3280af22 3413 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
ed344e4f 3414#endif
155aba94 3415 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3280af22
NIS		 3416 GvMULTI_on(PL_argvgv);
3417 (void)gv_AVadd(PL_argvgv);
3418 av_clear(GvAVn(PL_argvgv));
79072805 3419 for (; argc > 0; argc--,argv++) {
729a02f2
GS		 3420 SV *sv = newSVpv(argv[0],0);
3421 av_push(GvAVn(PL_argvgv),sv);
3422 if (PL_widesyscalls)
e84ff256 3423 (void)sv_utf8_decode(sv);
79072805
LW		 3424 }
3425 }
155aba94 3426 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
79072805 3427 HV *hv;
3280af22
NIS		 3428 GvMULTI_on(PL_envgv);
3429 hv = GvHVn(PL_envgv);
14befaf4 3430 hv_magic(hv, Nullgv, PERL_MAGIC_env);
fa6a1c44 3431#ifdef USE_ENVIRON_ARRAY
4633a7c4
LW		 3432 /* Note that if the supplied env parameter is actually a copy
3433 of the global environ then it may now point to free'd memory
3434 if the environment has been modified since. To avoid this
3435 problem we treat env==NULL as meaning 'use the default'
3436 */
3437 if (!env)
3438 env = environ;
5aabfad6 3439 if (env != environ)
79072805 3440 environ[0] = Nullch;
103a7189
JH		 3441#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
3442 {
3443 char **env_base;
9041c2e3 3444 for (env_base = env; *env; env++)
103a7189
JH		 3445 dup_env_count++;
3446 if ((dup_env_base = (char **)
480bfd1e 3447 safesysmalloc( sizeof(char *) * (dup_env_count+1) ))) {
103a7189
JH		 3448 char **dup_env;
3449 for (env = env_base, dup_env = dup_env_base;
3450 *env;
480bfd1e
JH		 3451 env++, dup_env++) {
3452 /* With environ one needs to use safesysmalloc(). */
3453 *dup_env = safesysmalloc(strlen(*env) + 1);
3454 (void)strcpy(*dup_env, *env);
3455 }
103a7189
JH		 3456 *dup_env = Nullch;
3457 env = dup_env_base;
3458 } /* else what? */
3459 }
3460#endif /* NEED_ENVIRON_DUP_FOR_MODIFY */
79072805 3461 for (; *env; env++) {
93a17b20 3462 if (!(s = strchr(*env,'=')))
79072805
LW		 3463 continue;
3464 *s++ = '\0';
60ce6247 3465#if defined(MSDOS)
137443ea 3466 (void)strupr(*env);
3467#endif
79072805
LW