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[perl5.git] / perl.c
CommitLineData
a0d0e21e
LW		 1/* perl.c
2 *
bc89e66f 3 * Copyright (c) 1987-2001 Larry Wall
a687059c 4 *
352d5a3a
LW		 5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
a687059c 7 *
8d063cd8
LW		 8 */
9
a0d0e21e
LW		 10/*
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
12 */
45d8adaa 13
378cc40b 14#include "EXTERN.h"
864dbfa3 15#define PERL_IN_PERL_C
378cc40b 16#include "perl.h"
e3321bb0 17#include "patchlevel.h" /* for local_patches */
378cc40b 18
df5cef82 19/* XXX If this causes problems, set i_unistd=undef in the hint file. */
a0d0e21e
LW		 20#ifdef I_UNISTD
21#include <unistd.h>
22#endif
a0d0e21e 23
7114a2d2 24#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
20ce7b12 25char *getenv (char *); /* Usually in <stdlib.h> */
54310121 26#endif
27
acfe0abc 28static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
0cb96387 29
a687059c
LW		 30#ifdef IAMSUID
31#ifndef DOSUID
32#define DOSUID
33#endif
34#endif
378cc40b 35
a687059c
LW		 36#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
37#ifdef DOSUID
38#undef DOSUID
39#endif
40#endif
8d063cd8 41
4d1ff10f 42#if defined(USE_5005THREADS)
06d86050
GS		 43# define INIT_TLS_AND_INTERP \
44 STMT_START { \
45 if (!PL_curinterp) { \
46 PERL_SET_INTERP(my_perl); \
47 INIT_THREADS; \
48 ALLOC_THREAD_KEY; \
49 } \
50 } STMT_END
51#else
52# if defined(USE_ITHREADS)
53# define INIT_TLS_AND_INTERP \
54 STMT_START { \
55 if (!PL_curinterp) { \
56 PERL_SET_INTERP(my_perl); \
57 INIT_THREADS; \
58 ALLOC_THREAD_KEY; \
534825c4
GS		 59 PERL_SET_THX(my_perl); \
60 OP_REFCNT_INIT; \
61 } \
62 else { \
63 PERL_SET_THX(my_perl); \
06d86050 64 } \
06d86050
GS		 65 } STMT_END
66# else
67# define INIT_TLS_AND_INTERP \
68 STMT_START { \
69 if (!PL_curinterp) { \
70 PERL_SET_INTERP(my_perl); \
71 } \
72 PERL_SET_THX(my_perl); \
73 } STMT_END
74# endif
75#endif
76
32e30700
GS		 77#ifdef PERL_IMPLICIT_SYS
78PerlInterpreter *
7766f137
GS		 79perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
80 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
32e30700
GS		 81 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
82 struct IPerlDir* ipD, struct IPerlSock* ipS,
83 struct IPerlProc* ipP)
84{
85 PerlInterpreter *my_perl;
32e30700
GS		 86 /* New() needs interpreter, so call malloc() instead */
87 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 88 INIT_TLS_AND_INTERP;
32e30700
GS		 89 Zero(my_perl, 1, PerlInterpreter);
90 PL_Mem = ipM;
7766f137
GS		 91 PL_MemShared = ipMS;
92 PL_MemParse = ipMP;
32e30700
GS		 93 PL_Env = ipE;
94 PL_StdIO = ipStd;
95 PL_LIO = ipLIO;
96 PL_Dir = ipD;
97 PL_Sock = ipS;
98 PL_Proc = ipP;
7766f137 99
32e30700
GS		 100 return my_perl;
101}
102#else
954c1994
GS		 103
104/*
105=for apidoc perl_alloc
106
107Allocates a new Perl interpreter. See L<perlembed>.
108
109=cut
110*/
111
93a17b20 112PerlInterpreter *
cea2e8a9 113perl_alloc(void)
79072805 114{
cea2e8a9 115 PerlInterpreter *my_perl;
79072805 116
54aff467 117 /* New() needs interpreter, so call malloc() instead */
e8ee3774 118 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 119
06d86050 120 INIT_TLS_AND_INTERP;
dedcbb81 121 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 122 return my_perl;
79072805 123}
32e30700 124#endif /* PERL_IMPLICIT_SYS */
79072805 125
954c1994
GS		 126/*
127=for apidoc perl_construct
128
129Initializes a new Perl interpreter. See L<perlembed>.
130
131=cut
132*/
133
79072805 134void
0cb96387 135perl_construct(pTHXx)
79072805 136{
4d1ff10f 137#ifdef USE_5005THREADS
a863c7d1 138#ifndef FAKE_THREADS
e1f15930 139 struct perl_thread *thr = NULL;
a863c7d1 140#endif /* FAKE_THREADS */
4d1ff10f 141#endif /* USE_5005THREADS */
ba869deb 142
8990e307 143#ifdef MULTIPLICITY
54aff467 144 init_interp();
ac27b0f5 145 PL_perl_destruct_level = 1;
54aff467
GS		 146#else
147 if (PL_perl_destruct_level > 0)
148 init_interp();
149#endif
150
33f46ff6 151 /* Init the real globals (and main thread)? */
3280af22 152 if (!PL_linestr) {
4d1ff10f 153#ifdef USE_5005THREADS
533c011a 154 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB		 155 /*
156 * Safe to use basic SV functions from now on (though
157 * not things like mortals or tainting yet).
158 */
533c011a
NIS		 159 MUTEX_INIT(&PL_eval_mutex);
160 COND_INIT(&PL_eval_cond);
161 MUTEX_INIT(&PL_threads_mutex);
162 COND_INIT(&PL_nthreads_cond);
ba869deb 163# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 164 MUTEX_INIT(&PL_svref_mutex);
ba869deb 165# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 166
5ff3f7a4 167 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS		 168 MUTEX_INIT(&PL_sv_lock_mutex);
169 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 170
199100c8 171 thr = init_main_thread();
4d1ff10f 172#endif /* USE_5005THREADS */
11343788 173
14dd3ad8 174#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 175 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 176#endif
312caa8e 177
2aea9f8a
GS		 178 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
179
3280af22
NIS		 180 PL_linestr = NEWSV(65,79);
181 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 182
3280af22 183 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP		 184 /* set read-only and try to insure than we wont see REFCNT==0
185 very often */
186
3280af22
NIS		 187 SvREADONLY_on(&PL_sv_undef);
188 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 189
3280af22
NIS		 190 sv_setpv(&PL_sv_no,PL_No);
191 SvNV(&PL_sv_no);
192 SvREADONLY_on(&PL_sv_no);
193 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 194
3280af22
NIS		 195 sv_setpv(&PL_sv_yes,PL_Yes);
196 SvNV(&PL_sv_yes);
197 SvREADONLY_on(&PL_sv_yes);
198 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 199 }
79072805 200
cea2e8a9 201 PL_sighandlerp = Perl_sighandler;
3280af22 202 PL_pidstatus = newHV();
44a8e56a 203
79072805
LW		 204#ifdef MSDOS
205 /*
206 * There is no way we can refer to them from Perl so close them to save
207 * space. The other alternative would be to provide STDAUX and STDPRN
208 * filehandles.
209 */
2b96b0a5
JH		 210 (void)PerlIO_close(PerlIO_importFILE(stdaux, 0));
211 (void)PerlIO_close(PerlIO_importFILE(stdprn, 0));
79072805
LW		 212#endif
213 }
214
8bfdd7d9 215 PL_rs = newSVpvn("\n", 1);
dc92893f 216
cea2e8a9 217 init_stacks();
79072805 218
748a9306 219 init_ids();
3280af22 220 PL_lex_state = LEX_NOTPARSING;
a5f75d66 221
312caa8e 222 JMPENV_BOOTSTRAP;
f86702cc 223 STATUS_ALL_SUCCESS;
224
0672f40e 225 init_i18nl10n(1);
36477c24 226 SET_NUMERIC_STANDARD();
0b5b802d 227
a7cb1f99
GS		 228 {
229 U8 *s;
230 PL_patchlevel = NEWSV(0,4);
155aba94 231 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 232 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 233 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 234 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS		 235 /* Build version strings using "native" characters */
236 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
237 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
238 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS		 239 *s = '\0';
240 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
241 SvPOK_on(PL_patchlevel);
242 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
243 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 244#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 245 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 246#endif
a7cb1f99
GS		 247 ;
248 SvNOK_on(PL_patchlevel); /* dual valued */
249 SvUTF8_on(PL_patchlevel);
250 SvREADONLY_on(PL_patchlevel);
251 }
79072805 252
ab821d7f 253#if defined(LOCAL_PATCH_COUNT)
3280af22 254 PL_localpatches = local_patches; /* For possible -v */
ab821d7f 255#endif
256
52853b95
GS		 257#ifdef HAVE_INTERP_INTERN
258 sys_intern_init();
259#endif
260
3a1ee7e8 261 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 262
3280af22
NIS		 263 PL_fdpid = newAV(); /* for remembering popen pids by fd */
264 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 265 PL_errors = newSVpvn("",0);
1fcf4c12 266#ifdef USE_ITHREADS
13137afc
AB		 267 PL_regex_padav = newAV();
268 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
269 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 270#endif
e5dd39fc
AB		 271#ifdef USE_REENTRANT_API
272 New(31337, PL_reentrant_buffer,1, REBUF);
273 New(31337, PL_reentrant_buffer->tmbuff,1, struct tm);
274#endif
3d47000e
AB		 275
276 /* Note that strtab is a rather special HV. Assumptions are made
277 about not iterating on it, and not adding tie magic to it.
278 It is properly deallocated in perl_destruct() */
279 PL_strtab = newHV();
280
281#ifdef USE_5005THREADS
282 MUTEX_INIT(&PL_strtab_mutex);
283#endif
284 HvSHAREKEYS_off(PL_strtab); /* mandatory */
285 hv_ksplit(PL_strtab, 512);
286
0631ea03
AB		 287#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
288 _dyld_lookup_and_bind
289 ("__environ", (unsigned long *) &environ_pointer, NULL);
290#endif /* environ */
291
292#ifdef USE_ENVIRON_ARRAY
293 PL_origenviron = environ;
294#endif
295
8990e307 296 ENTER;
79072805
LW		 297}
298
954c1994
GS		 299/*
300=for apidoc perl_destruct
301
302Shuts down a Perl interpreter. See L<perlembed>.
303
304=cut
305*/
306
31d77e54 307int
0cb96387 308perl_destruct(pTHXx)
79072805 309{
7c474504 310 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 311 HV *hv;
4d1ff10f 312#ifdef USE_5005THREADS
33f46ff6 313 Thread t;
cea2e8a9 314 dTHX;
4d1ff10f 315#endif /* USE_5005THREADS */
8990e307 316
7766f137
GS		 317 /* wait for all pseudo-forked children to finish */
318 PERL_WAIT_FOR_CHILDREN;
319
4d1ff10f 320#ifdef USE_5005THREADS
0f15f207 321#ifndef FAKE_THREADS
8023c3ce
MB		 322 /* Pass 1 on any remaining threads: detach joinables, join zombies */
323 retry_cleanup:
533c011a 324 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 325 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 326 "perl_destruct: waiting for %d threads...\n",
533c011a 327 PL_nthreads - 1));
33f46ff6 328 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB		 329 MUTEX_LOCK(&t->mutex);
330 switch (ThrSTATE(t)) {
331 AV *av;
c7848ba1 332 case THRf_ZOMBIE:
bf49b057 333 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 334 "perl_destruct: joining zombie %p\n", t));
605e5515
MB		 335 ThrSETSTATE(t, THRf_DEAD);
336 MUTEX_UNLOCK(&t->mutex);
533c011a 337 PL_nthreads--;
8023c3ce
MB		 338 /*
339 * The SvREFCNT_dec below may take a long time (e.g. av
340 * may contain an object scalar whose destructor gets
341 * called) so we have to unlock threads_mutex and start
342 * all over again.
343 */
533c011a 344 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 345 JOIN(t, &av);
605e5515 346 SvREFCNT_dec((SV*)av);
bf49b057 347 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 348 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 349 goto retry_cleanup;
c7848ba1 350 case THRf_R_JOINABLE:
bf49b057 351 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 352 "perl_destruct: detaching thread %p\n", t));
353 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 354 /*
c7848ba1
MB		 355 * We unlock threads_mutex and t->mutex in the opposite order
356 * from which we locked them just so that DETACH won't
357 * deadlock if it panics. It's only a breach of good style
358 * not a bug since they are unlocks not locks.
359 */
533c011a 360 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB		 361 DETACH(t);
362 MUTEX_UNLOCK(&t->mutex);
8023c3ce 363 goto retry_cleanup;
c7848ba1 364 default:
bf49b057 365 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 366 "perl_destruct: ignoring %p (state %u)\n",
367 t, ThrSTATE(t)));
368 MUTEX_UNLOCK(&t->mutex);
c7848ba1 369 /* fall through and out */
33f46ff6
MB		 370 }
371 }
8023c3ce
MB		 372 /* We leave the above "Pass 1" loop with threads_mutex still locked */
373
374 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 375 while (PL_nthreads > 1)
11343788 376 {
bf49b057 377 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 378 "perl_destruct: final wait for %d threads\n",
533c011a
NIS		 379 PL_nthreads - 1));
380 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB		 381 }
382 /* At this point, we're the last thread */
533c011a 383 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 384 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS		 385 MUTEX_DESTROY(&PL_threads_mutex);
386 COND_DESTROY(&PL_nthreads_cond);
b57a092c 387 PL_nthreads--;
0f15f207 388#endif /* !defined(FAKE_THREADS) */
4d1ff10f 389#endif /* USE_5005THREADS */
11343788 390
3280af22 391 destruct_level = PL_perl_destruct_level;
4633a7c4
LW		 392#ifdef DEBUGGING
393 {
394 char *s;
155aba94 395 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc 396 int i = atoi(s);
397 if (destruct_level < i)
398 destruct_level = i;
399 }
4633a7c4
LW		 400 }
401#endif
402
31d77e54
AB		 403
404 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB		 405 dJMPENV;
406 int x = 0;
407
408 JMPENV_PUSH(x);
409 if (PL_endav && !PL_minus_c)
410 call_list(PL_scopestack_ix, PL_endav);
411 JMPENV_POP;
26f423df 412 }
f3faeb53 413 LEAVE;
a0d0e21e
LW		 414 FREETMPS;
415
ff0cee69 416 /* We must account for everything. */
417
418 /* Destroy the main CV and syntax tree */
3280af22
NIS		 419 if (PL_main_root) {
420 PL_curpad = AvARRAY(PL_comppad);
421 op_free(PL_main_root);
422 PL_main_root = Nullop;
a0d0e21e 423 }
3280af22
NIS		 424 PL_curcop = &PL_compiling;
425 PL_main_start = Nullop;
426 SvREFCNT_dec(PL_main_cv);
427 PL_main_cv = Nullcv;
24d3c518 428 PL_dirty = TRUE;
ff0cee69 429
13621cfb
NIS		 430 /* Tell PerlIO we are about to tear things apart in case
431 we have layers which are using resources that should
432 be cleaned up now.
433 */
434
435 PerlIO_destruct(aTHX);
436
3280af22 437 if (PL_sv_objcount) {
a0d0e21e
LW		 438 /*
439 * Try to destruct global references. We do this first so that the
440 * destructors and destructees still exist. Some sv's might remain.
441 * Non-referenced objects are on their own.
442 */
a0d0e21e 443 sv_clean_objs();
8990e307
LW		 444 }
445
5cd24f17 446 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS		 447 SvREFCNT_dec(PL_warnhook);
448 PL_warnhook = Nullsv;
449 SvREFCNT_dec(PL_diehook);
450 PL_diehook = Nullsv;
5cd24f17 451
4b556e6c 452 /* call exit list functions */
3280af22 453 while (PL_exitlistlen-- > 0)
acfe0abc 454 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 455
3280af22 456 Safefree(PL_exitlist);
4b556e6c 457
a0d0e21e 458 if (destruct_level == 0){
8990e307 459
a0d0e21e 460 DEBUG_P(debprofdump());
ac27b0f5 461
56a2bab7
NIS		 462#if defined(PERLIO_LAYERS)
463 /* No more IO - including error messages ! */
464 PerlIO_cleanup(aTHX);
465#endif
466
a0d0e21e 467 /* The exit() function will do everything that needs doing. */
31d77e54 468 return STATUS_NATIVE_EXPORT;;
a0d0e21e 469 }
5dd60ef7 470
551a8b83 471 /* jettison our possibly duplicated environment */
4b647fb0
DM		 472 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
473 * so we certainly shouldn't free it here
474 */
475#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
551a8b83
JH		 476 if (environ != PL_origenviron) {
477 I32 i;
478
479 for (i = 0; environ[i]; i++)
4b420006 480 safesysfree(environ[i]);
0631ea03 481
4b420006
JH		 482 /* Must use safesysfree() when working with environ. */
483 safesysfree(environ);
551a8b83
JH		 484
485 environ = PL_origenviron;
486 }
487#endif
488
5f8cb046
DM		 489#ifdef USE_ITHREADS
490 /* the syntax tree is shared between clones
491 * so op_free(PL_main_root) only ReREFCNT_dec's
492 * REGEXPs in the parent interpreter
493 * we need to manually ReREFCNT_dec for the clones
494 */
495 {
496 I32 i = AvFILLp(PL_regex_padav) + 1;
497 SV **ary = AvARRAY(PL_regex_padav);
498
499 while (i) {
35061a7e 500 SV *resv = ary[--i];
ba89bb6e 501 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM		 502
503 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 504 /* this is PL_reg_curpm, already freed
35061a7e
DM		 505 * flag is set in regexec.c:S_regtry
506 */
507 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 508 }
1cc8b4c5
AB		 509 else if(SvREPADTMP(resv)) {
510 SvREPADTMP_off(resv);
511 }
35061a7e 512 else {
5f8cb046
DM		 513 ReREFCNT_dec(re);
514 }
515 }
516 }
517 SvREFCNT_dec(PL_regex_padav);
518 PL_regex_padav = Nullav;
519 PL_regex_pad = NULL;
520#endif
521
5f05dabc 522 /* loosen bonds of global variables */
523
3280af22
NIS		 524 if(PL_rsfp) {
525 (void)PerlIO_close(PL_rsfp);
526 PL_rsfp = Nullfp;
8ebc5c01 527 }
528
529 /* Filters for program text */
3280af22
NIS		 530 SvREFCNT_dec(PL_rsfp_filters);
531 PL_rsfp_filters = Nullav;
8ebc5c01 532
533 /* switches */
3280af22
NIS		 534 PL_preprocess = FALSE;
535 PL_minus_n = FALSE;
536 PL_minus_p = FALSE;
537 PL_minus_l = FALSE;
538 PL_minus_a = FALSE;
539 PL_minus_F = FALSE;
540 PL_doswitches = FALSE;
599cee73 541 PL_dowarn = G_WARN_OFF;
3280af22
NIS		 542 PL_doextract = FALSE;
543 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS		 544 PL_unsafe = FALSE;
545
546 Safefree(PL_inplace);
547 PL_inplace = Nullch;
a7cb1f99 548 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS		 549
550 if (PL_e_script) {
551 SvREFCNT_dec(PL_e_script);
552 PL_e_script = Nullsv;
8ebc5c01 553 }
554
bc0a45ed
DM		 555 while (--PL_origargc >= 0) {
556 Safefree(PL_origargv[PL_origargc]);
557 }
558 Safefree(PL_origargv);
559
8ebc5c01 560 /* magical thingies */
561
7889fe52
NIS		 562 SvREFCNT_dec(PL_ofs_sv); /* $, */
563 PL_ofs_sv = Nullsv;
5f05dabc 564
7889fe52
NIS		 565 SvREFCNT_dec(PL_ors_sv); /* $\ */
566 PL_ors_sv = Nullsv;
8ebc5c01 567
3280af22
NIS		 568 SvREFCNT_dec(PL_rs); /* $/ */
569 PL_rs = Nullsv;
dc92893f 570
d33b2eba
GS		 571 PL_multiline = 0; /* $* */
572 Safefree(PL_osname); /* $^O */
573 PL_osname = Nullch;
5f05dabc 574
3280af22
NIS		 575 SvREFCNT_dec(PL_statname);
576 PL_statname = Nullsv;
577 PL_statgv = Nullgv;
5f05dabc 578
8ebc5c01 579 /* defgv, aka *_ should be taken care of elsewhere */
580
8ebc5c01 581 /* clean up after study() */
3280af22
NIS		 582 SvREFCNT_dec(PL_lastscream);
583 PL_lastscream = Nullsv;
584 Safefree(PL_screamfirst);
585 PL_screamfirst = 0;
586 Safefree(PL_screamnext);
587 PL_screamnext = 0;
8ebc5c01 588
7d5ea4e7
GS		 589 /* float buffer */
590 Safefree(PL_efloatbuf);
591 PL_efloatbuf = Nullch;
592 PL_efloatsize = 0;
593
8ebc5c01 594 /* startup and shutdown function lists */
3280af22 595 SvREFCNT_dec(PL_beginav);
5a837c8f 596 SvREFCNT_dec(PL_beginav_save);
3280af22 597 SvREFCNT_dec(PL_endav);
7d30b5c4 598 SvREFCNT_dec(PL_checkav);
3280af22
NIS		 599 SvREFCNT_dec(PL_initav);
600 PL_beginav = Nullav;
5a837c8f 601 PL_beginav_save = Nullav;
3280af22 602 PL_endav = Nullav;
7d30b5c4 603 PL_checkav = Nullav;
3280af22 604 PL_initav = Nullav;
5618dfe8 605
8ebc5c01 606 /* shortcuts just get cleared */
3280af22 607 PL_envgv = Nullgv;
3280af22
NIS		 608 PL_incgv = Nullgv;
609 PL_hintgv = Nullgv;
610 PL_errgv = Nullgv;
611 PL_argvgv = Nullgv;
612 PL_argvoutgv = Nullgv;
613 PL_stdingv = Nullgv;
bf49b057 614 PL_stderrgv = Nullgv;
3280af22
NIS		 615 PL_last_in_gv = Nullgv;
616 PL_replgv = Nullgv;
5c831c24 617 PL_debstash = Nullhv;
8ebc5c01 618
619 /* reset so print() ends up where we expect */
620 setdefout(Nullgv);
5c831c24 621
7a1c5554
GS		 622 SvREFCNT_dec(PL_argvout_stack);
623 PL_argvout_stack = Nullav;
8ebc5c01 624
5c831c24
GS		 625 SvREFCNT_dec(PL_modglobal);
626 PL_modglobal = Nullhv;
627 SvREFCNT_dec(PL_preambleav);
628 PL_preambleav = Nullav;
629 SvREFCNT_dec(PL_subname);
630 PL_subname = Nullsv;
631 SvREFCNT_dec(PL_linestr);
632 PL_linestr = Nullsv;
633 SvREFCNT_dec(PL_pidstatus);
634 PL_pidstatus = Nullhv;
635 SvREFCNT_dec(PL_toptarget);
636 PL_toptarget = Nullsv;
637 SvREFCNT_dec(PL_bodytarget);
638 PL_bodytarget = Nullsv;
639 PL_formtarget = Nullsv;
640
d33b2eba 641 /* free locale stuff */
b9582b6a 642#ifdef USE_LOCALE_COLLATE
d33b2eba
GS		 643 Safefree(PL_collation_name);
644 PL_collation_name = Nullch;
b9582b6a 645#endif
d33b2eba 646
b9582b6a 647#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS		 648 Safefree(PL_numeric_name);
649 PL_numeric_name = Nullch;
a453c169 650 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 651#endif
d33b2eba 652
5c831c24
GS		 653 /* clear utf8 character classes */
654 SvREFCNT_dec(PL_utf8_alnum);
655 SvREFCNT_dec(PL_utf8_alnumc);
656 SvREFCNT_dec(PL_utf8_ascii);
657 SvREFCNT_dec(PL_utf8_alpha);
658 SvREFCNT_dec(PL_utf8_space);
659 SvREFCNT_dec(PL_utf8_cntrl);
660 SvREFCNT_dec(PL_utf8_graph);
661 SvREFCNT_dec(PL_utf8_digit);
662 SvREFCNT_dec(PL_utf8_upper);
663 SvREFCNT_dec(PL_utf8_lower);
664 SvREFCNT_dec(PL_utf8_print);
665 SvREFCNT_dec(PL_utf8_punct);
666 SvREFCNT_dec(PL_utf8_xdigit);
667 SvREFCNT_dec(PL_utf8_mark);
668 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 669 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 670 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 671 SvREFCNT_dec(PL_utf8_tofold);
5c831c24
GS		 672 PL_utf8_alnum = Nullsv;
673 PL_utf8_alnumc = Nullsv;
674 PL_utf8_ascii = Nullsv;
675 PL_utf8_alpha = Nullsv;
676 PL_utf8_space = Nullsv;
677 PL_utf8_cntrl = Nullsv;
678 PL_utf8_graph = Nullsv;
679 PL_utf8_digit = Nullsv;
680 PL_utf8_upper = Nullsv;
681 PL_utf8_lower = Nullsv;
682 PL_utf8_print = Nullsv;
683 PL_utf8_punct = Nullsv;
684 PL_utf8_xdigit = Nullsv;
685 PL_utf8_mark = Nullsv;
686 PL_utf8_toupper = Nullsv;
687 PL_utf8_totitle = Nullsv;
688 PL_utf8_tolower = Nullsv;
b4e400f9 689 PL_utf8_tofold = Nullsv;
5c831c24 690
971a9dd3
GS		 691 if (!specialWARN(PL_compiling.cop_warnings))
692 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 693 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS		 694 if (!specialCopIO(PL_compiling.cop_io))
695 SvREFCNT_dec(PL_compiling.cop_io);
696 PL_compiling.cop_io = Nullsv;
f4dd75d9
GS		 697#ifdef USE_ITHREADS
698 Safefree(CopFILE(&PL_compiling));
699 CopFILE(&PL_compiling) = Nullch;
700 Safefree(CopSTASHPV(&PL_compiling));
701#else
01724ea0 702 SvREFCNT_dec(CopFILEGV(&PL_compiling));
f4dd75d9
GS		 703 CopFILEGV(&PL_compiling) = Nullgv;
704 /* cop_stash is not refcounted */
01724ea0 705#endif
5c831c24 706
a0d0e21e 707 /* Prepare to destruct main symbol table. */
5f05dabc 708
3280af22
NIS		 709 hv = PL_defstash;
710 PL_defstash = 0;
a0d0e21e 711 SvREFCNT_dec(hv);
5c831c24
GS		 712 SvREFCNT_dec(PL_curstname);
713 PL_curstname = Nullsv;
a0d0e21e 714
5a844595
GS		 715 /* clear queued errors */
716 SvREFCNT_dec(PL_errors);
717 PL_errors = Nullsv;
718
a0d0e21e 719 FREETMPS;
0453d815 720 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 721 if (PL_scopestack_ix != 0)
0453d815
PM		 722 Perl_warner(aTHX_ WARN_INTERNAL,
723 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS		 724 (long)PL_scopestack_ix);
725 if (PL_savestack_ix != 0)
0453d815
PM		 726 Perl_warner(aTHX_ WARN_INTERNAL,
727 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS		 728 (long)PL_savestack_ix);
729 if (PL_tmps_floor != -1)
0453d815 730 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 731 (long)PL_tmps_floor + 1);
a0d0e21e 732 if (cxstack_ix != -1)
0453d815 733 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 734 (long)cxstack_ix + 1);
a0d0e21e 735 }
8990e307
LW		 736
737 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 738 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 739 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH		 740
741 /* the 2 is for PL_fdpid and PL_strtab */
742 while (PL_sv_count > 2 && sv_clean_all())
743 ;
744
d33b2eba
GS		 745 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
746 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS		 747 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
748 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 749
d4777f27
GS		 750 AvREAL_off(PL_fdpid); /* no surviving entries */
751 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS		 752 PL_fdpid = Nullav;
753
6c644e78
GS		 754#ifdef HAVE_INTERP_INTERN
755 sys_intern_clear();
756#endif
757
6e72f9df 758 /* Destruct the global string table. */
759 {
760 /* Yell and reset the HeVAL() slots that are still holding refcounts,
761 * so that sv_free() won't fail on them.
762 */
763 I32 riter;
764 I32 max;
765 HE *hent;
766 HE **array;
767
768 riter = 0;
3280af22
NIS		 769 max = HvMAX(PL_strtab);
770 array = HvARRAY(PL_strtab);
6e72f9df 771 hent = array[0];
772 for (;;) {
0453d815
PM		 773 if (hent && ckWARN_d(WARN_INTERNAL)) {
774 Perl_warner(aTHX_ WARN_INTERNAL,
775 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df 776 HeVAL(hent) - Nullsv, HeKEY(hent));
777 HeVAL(hent) = Nullsv;
778 hent = HeNEXT(hent);
779 }
780 if (!hent) {
781 if (++riter > max)
782 break;
783 hent = array[riter];
784 }
785 }
786 }
3280af22 787 SvREFCNT_dec(PL_strtab);
6e72f9df 788
e652bb2f 789#ifdef USE_ITHREADS
a0739874
DM		 790 /* free the pointer table used for cloning */
791 ptr_table_free(PL_ptr_table);
53186e96 792#endif
a0739874 793
d33b2eba
GS		 794 /* free special SVs */
795
796 SvREFCNT(&PL_sv_yes) = 0;
797 sv_clear(&PL_sv_yes);
798 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 799 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS		 800
801 SvREFCNT(&PL_sv_no) = 0;
802 sv_clear(&PL_sv_no);
803 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 804 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS		 805
806 SvREFCNT(&PL_sv_undef) = 0;
807 SvREADONLY_off(&PL_sv_undef);
d33b2eba 808
0453d815
PM		 809 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
810 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 811
56a2bab7 812#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS		 813 /* No more IO - including error messages ! */
814 PerlIO_cleanup(aTHX);
815#endif
816
3280af22 817 Safefree(PL_origfilename);
3280af22 818 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ		 819 if (PL_reg_curpm)
820 Safefree(PL_reg_curpm);
82ba1be6 821 Safefree(PL_reg_poscache);
3280af22
NIS		 822 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
823 Safefree(PL_op_mask);
cf36064f
GS		 824 Safefree(PL_psig_ptr);
825 Safefree(PL_psig_name);
2c2666fc 826 Safefree(PL_bitcount);
ce08f86c 827 Safefree(PL_psig_pend);
6e72f9df 828 nuke_stacks();
3280af22 829 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 830
a0d0e21e 831 DEBUG_P(debprofdump());
4d1ff10f 832#ifdef USE_5005THREADS
5f08fbcd 833 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS		 834 MUTEX_DESTROY(&PL_sv_mutex);
835 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 836 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 837 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 838 COND_DESTROY(&PL_eval_cond);
11d617a5
GS		 839#ifdef EMULATE_ATOMIC_REFCOUNTS
840 MUTEX_DESTROY(&PL_svref_mutex);
841#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 842
8023c3ce 843 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS		 844 Safefree(SvPVX(PL_thrsv));
845 Safefree(SvANY(PL_thrsv));
846 Safefree(PL_thrsv);
847 PL_thrsv = Nullsv;
4d1ff10f 848#endif /* USE_5005THREADS */
d33b2eba 849
e5dd39fc
AB		 850#ifdef USE_REENTRANT_API
851 Safefree(PL_reentrant_buffer->tmbuff);
852 Safefree(PL_reentrant_buffer);
853#endif
854
612f20c3
GS		 855 sv_free_arenas();
856
fc36a67e 857 /* As the absolutely last thing, free the non-arena SV for mess() */
858
3280af22 859 if (PL_mess_sv) {
9c63abab
GS		 860 /* it could have accumulated taint magic */
861 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
862 MAGIC* mg;
863 MAGIC* moremagic;
864 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
865 moremagic = mg->mg_moremagic;
14befaf4
DM		 866 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
867 && mg->mg_len >= 0)
9c63abab
GS		 868 Safefree(mg->mg_ptr);
869 Safefree(mg);
870 }
871 }
fc36a67e 872 /* we know that type >= SVt_PV */
155aba94 873 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS		 874 Safefree(SvPVX(PL_mess_sv));
875 Safefree(SvANY(PL_mess_sv));
876 Safefree(PL_mess_sv);
877 PL_mess_sv = Nullsv;
fc36a67e 878 }
31d77e54 879 return STATUS_NATIVE_EXPORT;
79072805
LW		 880}
881
954c1994
GS		 882/*
883=for apidoc perl_free
884
885Releases a Perl interpreter. See L<perlembed>.
886
887=cut
888*/
889
79072805 890void
0cb96387 891perl_free(pTHXx)
79072805 892{
acfe0abc 893#if defined(WIN32) || defined(NETWARE)
ce3e5b80 894# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS		 895# ifdef NETWARE
896 void *host = nw_internal_host;
897# else
898 void *host = w32_internal_host;
899# endif
ce3e5b80 900 PerlMem_free(aTHXx);
acfe0abc
GS		 901# ifdef NETWARE
902 nw5_delete_internal_host(host);
903# else
904 win32_delete_internal_host(host);
905# endif
1c0ca838
GS		 906# else
907 PerlMem_free(aTHXx);
908# endif
acfe0abc
GS		 909#else
910 PerlMem_free(aTHXx);
76e3520e 911#endif
79072805
LW		 912}
913
4b556e6c 914void
864dbfa3 915Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 916{
3280af22
NIS		 917 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
918 PL_exitlist[PL_exitlistlen].fn = fn;
919 PL_exitlist[PL_exitlistlen].ptr = ptr;
920 ++PL_exitlistlen;
4b556e6c
JD		 921}
922
954c1994
GS		 923/*
924=for apidoc perl_parse
925
926Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
927
928=cut
929*/
930
79072805 931int
0cb96387 932perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 933{
6224f72b 934 I32 oldscope;
6224f72b 935 int ret;
db36c5a1 936 dJMPENV;
4d1ff10f 937#ifdef USE_5005THREADS
cea2e8a9
GS		 938 dTHX;
939#endif
8d063cd8 940
a687059c
LW		 941#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
942#ifdef IAMSUID
943#undef IAMSUID
cea2e8a9 944 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW		 945setuid perl scripts securely.\n");
946#endif
947#endif
948
3280af22 949 PL_origargc = argc;
bc0a45ed
DM		 950 {
951 /* we copy rather than point to argv
952 * since perl_clone will copy and perl_destruct
3a1ee7e8 953 * has no way of knowing if we've made a copy or
bc0a45ed
DM		 954 * just point to argv
955 */
956 int i = PL_origargc;
957 New(0, PL_origargv, i+1, char*);
958 PL_origargv[i] = '\0';
959 while (i-- > 0) {
960 PL_origargv[i] = savepv(argv[i]);
961 }
962 }
963
0631ea03 964
a0d0e21e 965
3280af22 966 if (PL_do_undump) {
a0d0e21e
LW		 967
968 /* Come here if running an undumped a.out. */
969
3280af22
NIS		 970 PL_origfilename = savepv(argv[0]);
971 PL_do_undump = FALSE;
a0d0e21e 972 cxstack_ix = -1; /* start label stack again */
748a9306 973 init_ids();
a0d0e21e
LW		 974 init_postdump_symbols(argc,argv,env);
975 return 0;
976 }
977
3280af22
NIS		 978 if (PL_main_root) {
979 PL_curpad = AvARRAY(PL_comppad);
980 op_free(PL_main_root);
981 PL_main_root = Nullop;
ff0cee69 982 }
3280af22
NIS		 983 PL_main_start = Nullop;
984 SvREFCNT_dec(PL_main_cv);
985 PL_main_cv = Nullcv;
79072805 986
3280af22
NIS		 987 time(&PL_basetime);
988 oldscope = PL_scopestack_ix;
599cee73 989 PL_dowarn = G_WARN_OFF;
f86702cc 990
14dd3ad8
GS		 991#ifdef PERL_FLEXIBLE_EXCEPTIONS
992 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
993#else
994 JMPENV_PUSH(ret);
995#endif
6224f72b 996 switch (ret) {
312caa8e 997 case 0:
14dd3ad8
GS		 998#ifndef PERL_FLEXIBLE_EXCEPTIONS
999 parse_body(env,xsinit);
1000#endif
7d30b5c4
GS		 1001 if (PL_checkav)
1002 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 1003 ret = 0;
1004 break;
6224f72b
GS		 1005 case 1:
1006 STATUS_ALL_FAILURE;
1007 /* FALL THROUGH */
1008 case 2:
1009 /* my_exit() was called */
3280af22 1010 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1011 LEAVE;
1012 FREETMPS;
3280af22 1013 PL_curstash = PL_defstash;
7d30b5c4
GS		 1014 if (PL_checkav)
1015 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 1016 ret = STATUS_NATIVE_EXPORT;
1017 break;
6224f72b 1018 case 3:
bf49b057 1019 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS		 1020 ret = 1;
1021 break;
6224f72b 1022 }
14dd3ad8
GS		 1023 JMPENV_POP;
1024 return ret;
1025}
1026
1027#ifdef PERL_FLEXIBLE_EXCEPTIONS
1028STATIC void *
1029S_vparse_body(pTHX_ va_list args)
1030{
1031 char **env = va_arg(args, char**);
1032 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1033
1034 return parse_body(env, xsinit);
312caa8e 1035}
14dd3ad8 1036#endif
312caa8e
CS		 1037
1038STATIC void *
14dd3ad8 1039S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1040{
312caa8e
CS		 1041 int argc = PL_origargc;
1042 char **argv = PL_origargv;
312caa8e
CS		 1043 char *scriptname = NULL;
1044 int fdscript = -1;
1045 VOL bool dosearch = FALSE;
1046 char *validarg = "";
1047 AV* comppadlist;
1048 register SV *sv;
1049 register char *s;
cf756827 1050 char *cddir = Nullch;
312caa8e 1051
3280af22 1052 sv_setpvn(PL_linestr,"",0);
79cb57f6 1053 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS		 1054 SAVEFREESV(sv);
1055 init_main_stash();
54310121 1056
6224f72b
GS		 1057 for (argc--,argv++; argc > 0; argc--,argv++) {
1058 if (argv[0][0] != '-' || !argv[0][1])
1059 break;
1060#ifdef DOSUID
1061 if (*validarg)
1062 validarg = " PHOOEY ";
1063 else
1064 validarg = argv[0];
13281fa4 1065#endif
6224f72b
GS		 1066 s = argv[0]+1;
1067 reswitch:
1068 switch (*s) {
729a02f2
GS		 1069 case 'C':
1070#ifdef WIN32
c0932edc 1071 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS		 1072 /* FALL THROUGH */
1073#endif
1d5472a9
GS		 1074#ifndef PERL_STRICT_CR
1075 case '\r':
1076#endif
6224f72b
GS		 1077 case ' ':
1078 case '0':
1079 case 'F':
1080 case 'a':
1081 case 'c':
1082 case 'd':
1083 case 'D':
1084 case 'h':
1085 case 'i':
1086 case 'l':
1087 case 'M':
1088 case 'm':
1089 case 'n':
1090 case 'p':
1091 case 's':
1092 case 'u':
1093 case 'U':
1094 case 'v':
599cee73
PM		 1095 case 'W':
1096 case 'X':
6224f72b 1097 case 'w':
155aba94 1098 if ((s = moreswitches(s)))
6224f72b
GS		 1099 goto reswitch;
1100 break;
33b78306 1101
1dbad523 1102 case 't':
317ea90d
MS		 1103 if( !PL_tainting ) {
1104 PL_taint_warn = TRUE;
1105 PL_tainting = TRUE;
1106 }
1107 s++;
1108 goto reswitch;
6224f72b 1109 case 'T':
3280af22 1110 PL_tainting = TRUE;
317ea90d 1111 PL_taint_warn = FALSE;
6224f72b
GS		 1112 s++;
1113 goto reswitch;
f86702cc 1114
6224f72b 1115 case 'e':
bf4acbe4
GS		 1116#ifdef MACOS_TRADITIONAL
1117 /* ignore -e for Dev:Pseudo argument */
1118 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1119 break;
bf4acbe4 1120#endif
3280af22 1121 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1122 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1123 if (!PL_e_script) {
79cb57f6 1124 PL_e_script = newSVpvn("",0);
0cb96387 1125 filter_add(read_e_script, NULL);
6224f72b
GS		 1126 }
1127 if (*++s)
3280af22 1128 sv_catpv(PL_e_script, s);
6224f72b 1129 else if (argv[1]) {
3280af22 1130 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS		 1131 argc--,argv++;
1132 }
1133 else
cea2e8a9 1134 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1135 sv_catpv(PL_e_script, "\n");
6224f72b 1136 break;
afe37c7d 1137
6224f72b
GS		 1138 case 'I': /* -I handled both here and in moreswitches() */
1139 forbid_setid("-I");
1140 if (!*++s && (s=argv[1]) != Nullch) {
1141 argc--,argv++;
1142 }
6224f72b 1143 if (s && *s) {
0df16ed7
GS		 1144 char *p;
1145 STRLEN len = strlen(s);
1146 p = savepvn(s, len);
9c8a64f0 1147 incpush(p, TRUE, TRUE);
0df16ed7
GS		 1148 sv_catpvn(sv, "-I", 2);
1149 sv_catpvn(sv, p, len);
1150 sv_catpvn(sv, " ", 1);
6224f72b 1151 Safefree(p);
0df16ed7
GS		 1152 }
1153 else
a67e862a 1154 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS		 1155 break;
1156 case 'P':
1157 forbid_setid("-P");
3280af22 1158 PL_preprocess = TRUE;
6224f72b
GS		 1159 s++;
1160 goto reswitch;
1161 case 'S':
1162 forbid_setid("-S");
1163 dosearch = TRUE;
1164 s++;
1165 goto reswitch;
1166 case 'V':
3280af22
NIS		 1167 if (!PL_preambleav)
1168 PL_preambleav = newAV();
1169 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1170 if (*++s != ':') {
3280af22 1171 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1172#ifdef VMS
6b88bc9c 1173 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1174#else
3280af22 1175 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1176#endif
3280af22 1177 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1178# ifdef DEBUGGING
3280af22 1179 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1180# endif
6224f72b 1181# ifdef MULTIPLICITY
8f872242 1182 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1183# endif
4d1ff10f
AB		 1184# ifdef USE_5005THREADS
1185 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1186# endif
ac5e8965
JH		 1187# ifdef USE_ITHREADS
1188 sv_catpv(PL_Sv," USE_ITHREADS");
1189# endif
10cc9d2a
JH		 1190# ifdef USE_64_BIT_INT
1191 sv_catpv(PL_Sv," USE_64_BIT_INT");
1192# endif
1193# ifdef USE_64_BIT_ALL
1194 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH		 1195# endif
1196# ifdef USE_LONG_DOUBLE
1197 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1198# endif
53430762
JH		 1199# ifdef USE_LARGE_FILES
1200 sv_catpv(PL_Sv," USE_LARGE_FILES");
1201# endif
ac5e8965
JH		 1202# ifdef USE_SOCKS
1203 sv_catpv(PL_Sv," USE_SOCKS");
1204# endif
b363f7ed
GS		 1205# ifdef PERL_IMPLICIT_CONTEXT
1206 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1207# endif
1208# ifdef PERL_IMPLICIT_SYS
1209 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1210# endif
3280af22 1211 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1212
6224f72b
GS		 1213#if defined(LOCAL_PATCH_COUNT)
1214 if (LOCAL_PATCH_COUNT > 0) {
1215 int i;
3280af22 1216 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1217 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1218 if (PL_localpatches[i])
cea2e8a9 1219 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS		 1220 }
1221 }
1222#endif
cea2e8a9 1223 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS		 1224#ifdef __DATE__
1225# ifdef __TIME__
cea2e8a9 1226 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1227# else
cea2e8a9 1228 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS		 1229# endif
1230#endif
3280af22 1231 sv_catpv(PL_Sv, "; \
6224f72b 1232$\"=\"\\n \"; \
69fcd688
JH		 1233@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1234#ifdef __CYGWIN__
1235 sv_catpv(PL_Sv,"\
1236push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1237#endif
1238 sv_catpv(PL_Sv, "\
6224f72b
GS		 1239print \" \\%ENV:\\n @env\\n\" if @env; \
1240print \" \\@INC:\\n @INC\\n\";");
1241 }
1242 else {
3280af22
NIS		 1243 PL_Sv = newSVpv("config_vars(qw(",0);
1244 sv_catpv(PL_Sv, ++s);
1245 sv_catpv(PL_Sv, "))");
6224f72b
GS		 1246 s += strlen(s);
1247 }
3280af22 1248 av_push(PL_preambleav, PL_Sv);
6224f72b
GS		 1249 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1250 goto reswitch;
1251 case 'x':
3280af22 1252 PL_doextract = TRUE;
6224f72b
GS		 1253 s++;
1254 if (*s)
f4c556ac 1255 cddir = s;
6224f72b
GS		 1256 break;
1257 case 0:
1258 break;
1259 case '-':
1260 if (!*++s || isSPACE(*s)) {
1261 argc--,argv++;
1262 goto switch_end;
1263 }
1264 /* catch use of gnu style long options */
1265 if (strEQ(s, "version")) {
1266 s = "v";
1267 goto reswitch;
1268 }
1269 if (strEQ(s, "help")) {
1270 s = "h";
1271 goto reswitch;
1272 }
1273 s--;
1274 /* FALL THROUGH */
1275 default:
cea2e8a9 1276 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW		 1277 }
1278 }
6224f72b 1279 switch_end:
54310121 1280
f675dbe5
CB		 1281 if (
1282#ifndef SECURE_INTERNAL_GETENV
1283 !PL_tainting &&
1284#endif
cf756827 1285 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1286 {
cf756827 1287 char *popt = s;
74288ac8
GS		 1288 while (isSPACE(*s))
1289 s++;
317ea90d 1290 if (*s == '-' && *(s+1) == 'T') {
74288ac8 1291 PL_tainting = TRUE;
317ea90d
MS		 1292 PL_taint_warn = FALSE;
1293 }
74288ac8 1294 else {
cf756827 1295 char *popt_copy = Nullch;
74288ac8 1296 while (s && *s) {
4ea8f8fb 1297 char *d;
74288ac8
GS		 1298 while (isSPACE(*s))
1299 s++;
1300 if (*s == '-') {
1301 s++;
1302 if (isSPACE(*s))
1303 continue;
1304 }
4ea8f8fb 1305 d = s;
74288ac8
GS		 1306 if (!*s)
1307 break;
1c4db469 1308 if (!strchr("DIMUdmtw", *s))
cea2e8a9 1309 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS		 1310 while (++s && *s) {
1311 if (isSPACE(*s)) {
cf756827
GS		 1312 if (!popt_copy) {
1313 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1314 s = popt_copy + (s - popt);
1315 d = popt_copy + (d - popt);
1316 }
4ea8f8fb
MS		 1317 *s++ = '\0';
1318 break;
1319 }
1320 }
1c4db469 1321 if (*d == 't') {
317ea90d
MS		 1322 if( !PL_tainting ) {
1323 PL_taint_warn = TRUE;
1324 PL_tainting = TRUE;
1325 }
1c4db469
RGS		 1326 } else {
1327 moreswitches(d);
1328 }
6224f72b 1329 }
6224f72b
GS		 1330 }
1331 }
a0d0e21e 1332
317ea90d
MS		 1333 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1334 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1335 }
1336
6224f72b
GS		 1337 if (!scriptname)
1338 scriptname = argv[0];
3280af22 1339 if (PL_e_script) {
6224f72b
GS		 1340 argc++,argv--;
1341 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1342 }
1343 else if (scriptname == Nullch) {
1344#ifdef MSDOS
1345 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1346 moreswitches("h");
1347#endif
1348 scriptname = "-";
1349 }
1350
1351 init_perllib();
1352
1353 open_script(scriptname,dosearch,sv,&fdscript);
1354
1355 validate_suid(validarg, scriptname,fdscript);
1356
64ca3a65 1357#ifndef PERL_MICRO
0b5b802d
GS		 1358#if defined(SIGCHLD) || defined(SIGCLD)
1359 {
1360#ifndef SIGCHLD
1361# define SIGCHLD SIGCLD
1362#endif
1363 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1364 if (sigstate == SIG_IGN) {
1365 if (ckWARN(WARN_SIGNAL))
1366 Perl_warner(aTHX_ WARN_SIGNAL,
1367 "Can't ignore signal CHLD, forcing to default");
1368 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1369 }
1370 }
1371#endif
64ca3a65 1372#endif
0b5b802d 1373
bf4acbe4
GS		 1374#ifdef MACOS_TRADITIONAL
1375 if (PL_doextract || gMacPerl_AlwaysExtract) {
1376#else
f4c556ac 1377 if (PL_doextract) {
bf4acbe4 1378#endif
6224f72b 1379 find_beginning();
f4c556ac
GS		 1380 if (cddir && PerlDir_chdir(cddir) < 0)
1381 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1382
1383 }
6224f72b 1384
3280af22
NIS		 1385 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1386 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1387 CvUNIQUE_on(PL_compcv);
1388
1389 PL_comppad = newAV();
1390 av_push(PL_comppad, Nullsv);
1391 PL_curpad = AvARRAY(PL_comppad);
1392 PL_comppad_name = newAV();
1393 PL_comppad_name_fill = 0;
1394 PL_min_intro_pending = 0;
1395 PL_padix = 0;
4d1ff10f 1396#ifdef USE_5005THREADS
79cb57f6 1397 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS		 1398 PL_curpad[0] = (SV*)newAV();
1399 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1400 CvOWNER(PL_compcv) = 0;
1401 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1402 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1403#endif /* USE_5005THREADS */
6224f72b
GS		 1404
1405 comppadlist = newAV();
1406 AvREAL_off(comppadlist);
3280af22
NIS		 1407 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1408 av_store(comppadlist, 1, (SV*)PL_comppad);
1409 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1410
0c4f7ff0 1411 boot_core_PerlIO();
6224f72b 1412 boot_core_UNIVERSAL();
9a34ef1d 1413#ifndef PERL_MICRO
09bef843 1414 boot_core_xsutils();
9a34ef1d 1415#endif
6224f72b
GS		 1416
1417 if (xsinit)
acfe0abc 1418 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1419#ifndef PERL_MICRO
ed79a026 1420#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1421 init_os_extras();
6224f72b 1422#endif
64ca3a65 1423#endif
6224f72b 1424
29209bc5 1425#ifdef USE_SOCKS
1b9c9cf5
DH		 1426# ifdef HAS_SOCKS5_INIT
1427 socks5_init(argv[0]);
1428# else
29209bc5 1429 SOCKSinit(argv[0]);
1b9c9cf5 1430# endif
ac27b0f5 1431#endif
29209bc5 1432
6224f72b
GS		 1433 init_predump_symbols();
1434 /* init_postdump_symbols not currently designed to be called */
1435 /* more than once (ENV isn't cleared first, for example) */
1436 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1437 if (!PL_do_undump)
6224f72b
GS		 1438 init_postdump_symbols(argc,argv,env);
1439
1440 init_lexer();
1441
1442 /* now parse the script */
1443
91487cfc 1444 SETERRNO(0,SS$_NORMAL);
3280af22 1445 PL_error_count = 0;
bf4acbe4
GS		 1446#ifdef MACOS_TRADITIONAL
1447 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1448 if (PL_minus_c)
1449 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1450 else {
1451 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1452 MacPerl_MPWFileName(PL_origfilename));
1453 }
1454 }
1455#else
3280af22
NIS		 1456 if (yyparse() || PL_error_count) {
1457 if (PL_minus_c)
cea2e8a9 1458 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1459 else {
cea2e8a9 1460 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1461 PL_origfilename);
6224f72b
GS		 1462 }
1463 }
bf4acbe4 1464#endif
57843af0 1465 CopLINE_set(PL_curcop, 0);
3280af22
NIS		 1466 PL_curstash = PL_defstash;
1467 PL_preprocess = FALSE;
1468 if (PL_e_script) {
1469 SvREFCNT_dec(PL_e_script);
1470 PL_e_script = Nullsv;
6224f72b
GS		 1471 }
1472
8bfdd7d9
HS		 1473/*
1474 Not sure that this is still the right place to do this now that we
1475 no longer use PL_nrs. HVDS 2001/09/09
1476*/
864dbfa3 1477 sv_setsv(get_sv("/", TRUE), PL_rs);
8bfdd7d9 1478
3280af22 1479 if (PL_do_undump)
6224f72b
GS		 1480 my_unexec();
1481
57843af0
GS		 1482 if (isWARN_ONCE) {
1483 SAVECOPFILE(PL_curcop);
1484 SAVECOPLINE(PL_curcop);
3280af22 1485 gv_check(PL_defstash);
57843af0 1486 }
6224f72b
GS		 1487
1488 LEAVE;
1489 FREETMPS;
1490
1491#ifdef MYMALLOC
1492 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1493 dump_mstats("after compilation:");
1494#endif
1495
1496 ENTER;
3280af22 1497 PL_restartop = 0;
312caa8e 1498 return NULL;
6224f72b
GS		 1499}
1500
954c1994
GS		 1501/*
1502=for apidoc perl_run
1503
1504Tells a Perl interpreter to run. See L<perlembed>.
1505
1506=cut
1507*/
1508
6224f72b 1509int
0cb96387 1510perl_run(pTHXx)
6224f72b 1511{
6224f72b 1512 I32 oldscope;
14dd3ad8 1513 int ret = 0;
db36c5a1 1514 dJMPENV;
4d1ff10f 1515#ifdef USE_5005THREADS
cea2e8a9
GS		 1516 dTHX;
1517#endif
6224f72b 1518
3280af22 1519 oldscope = PL_scopestack_ix;
96e176bf
CL		 1520#ifdef VMS
1521 VMSISH_HUSHED = 0;
1522#endif
6224f72b 1523
14dd3ad8 1524#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1525 redo_body:
14dd3ad8
GS		 1526 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1527#else
1528 JMPENV_PUSH(ret);
1529#endif
6224f72b
GS		 1530 switch (ret) {
1531 case 1:
1532 cxstack_ix = -1; /* start context stack again */
312caa8e 1533 goto redo_body;
14dd3ad8
GS		 1534 case 0: /* normal completion */
1535#ifndef PERL_FLEXIBLE_EXCEPTIONS
1536 redo_body:
1537 run_body(oldscope);
1538#endif
1539 /* FALL THROUGH */
1540 case 2: /* my_exit() */
3280af22 1541 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1542 LEAVE;
1543 FREETMPS;
3280af22 1544 PL_curstash = PL_defstash;
3a1ee7e8 1545 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB		 1546 PL_endav && !PL_minus_c)
1547 call_list(oldscope, PL_endav);
6224f72b
GS		 1548#ifdef MYMALLOC
1549 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1550 dump_mstats("after execution: ");
1551#endif
14dd3ad8
GS		 1552 ret = STATUS_NATIVE_EXPORT;
1553 break;
6224f72b 1554 case 3:
312caa8e
CS		 1555 if (PL_restartop) {
1556 POPSTACK_TO(PL_mainstack);
1557 goto redo_body;
6224f72b 1558 }
bf49b057 1559 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1560 FREETMPS;
14dd3ad8
GS		 1561 ret = 1;
1562 break;
6224f72b
GS		 1563 }
1564
14dd3ad8
GS		 1565 JMPENV_POP;
1566 return ret;
312caa8e
CS		 1567}
1568
14dd3ad8 1569#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1570STATIC void *
14dd3ad8 1571S_vrun_body(pTHX_ va_list args)
312caa8e 1572{
312caa8e
CS		 1573 I32 oldscope = va_arg(args, I32);
1574
14dd3ad8
GS		 1575 return run_body(oldscope);
1576}
1577#endif
1578
1579
1580STATIC void *
1581S_run_body(pTHX_ I32 oldscope)
1582{
6224f72b 1583 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1584 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1585
3280af22 1586 if (!PL_restartop) {
6224f72b
GS		 1587 DEBUG_x(dump_all());
1588 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH		 1589 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1590 PTR2UV(thr)));
6224f72b 1591
3280af22 1592 if (PL_minus_c) {
bf4acbe4 1593#ifdef MACOS_TRADITIONAL
be708cc0 1594 PerlIO_printf(Perl_error_log, "# %s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1595#else
bf49b057 1596 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1597#endif
6224f72b
GS		 1598 my_exit(0);
1599 }
3280af22 1600 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1601 sv_setiv(PL_DBsingle, 1);
3280af22
NIS		 1602 if (PL_initav)
1603 call_list(oldscope, PL_initav);
6224f72b
GS		 1604 }
1605
1606 /* do it */
1607
3280af22 1608 if (PL_restartop) {
533c011a 1609 PL_op = PL_restartop;
3280af22 1610 PL_restartop = 0;
cea2e8a9 1611 CALLRUNOPS(aTHX);
6224f72b 1612 }
3280af22
NIS		 1613 else if (PL_main_start) {
1614 CvDEPTH(PL_main_cv) = 1;
533c011a 1615 PL_op = PL_main_start;
cea2e8a9 1616 CALLRUNOPS(aTHX);
6224f72b
GS		 1617 }
1618
f6b3007c
JH		 1619 my_exit(0);
1620 /* NOTREACHED */
312caa8e 1621 return NULL;
6224f72b
GS		 1622}
1623
954c1994
GS		 1624/*
1625=for apidoc p||get_sv
1626
1627Returns the SV of the specified Perl scalar. If C<create> is set and the
1628Perl variable does not exist then it will be created. If C<create> is not
1629set and the variable does not exist then NULL is returned.
1630
1631=cut
1632*/
1633
6224f72b 1634SV*
864dbfa3 1635Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS		 1636{
1637 GV *gv;
4d1ff10f 1638#ifdef USE_5005THREADS
6224f72b
GS		 1639 if (name[1] == '\0' && !isALPHA(name[0])) {
1640 PADOFFSET tmp = find_threadsv(name);
411caa50 1641 if (tmp != NOT_IN_PAD)
6224f72b 1642 return THREADSV(tmp);
6224f72b 1643 }
4d1ff10f 1644#endif /* USE_5005THREADS */
6224f72b
GS		 1645 gv = gv_fetchpv(name, create, SVt_PV);
1646 if (gv)
1647 return GvSV(gv);
1648 return Nullsv;
1649}
1650
954c1994
GS		 1651/*
1652=for apidoc p||get_av
1653
1654Returns the AV of the specified Perl array. If C<create> is set and the
1655Perl variable does not exist then it will be created. If C<create> is not
1656set and the variable does not exist then NULL is returned.
1657
1658=cut
1659*/
1660
6224f72b 1661AV*
864dbfa3 1662Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS		 1663{
1664 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1665 if (create)
1666 return GvAVn(gv);
1667 if (gv)
1668 return GvAV(gv);
1669 return Nullav;
1670}
1671
954c1994
GS		 1672/*
1673=for apidoc p||get_hv
1674
1675Returns the HV of the specified Perl hash. If C<create> is set and the
1676Perl variable does not exist then it will be created. If C<create> is not
1677set and the variable does not exist then NULL is returned.
1678
1679=cut
1680*/
1681
6224f72b 1682HV*
864dbfa3 1683Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1684{
a0d0e21e
LW		 1685 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1686 if (create)
1687 return GvHVn(gv);
1688 if (gv)
1689 return GvHV(gv);
1690 return Nullhv;
1691}
1692
954c1994
GS		 1693/*
1694=for apidoc p||get_cv
1695
1696Returns the CV of the specified Perl subroutine. If C<create> is set and
1697the Perl subroutine does not exist then it will be declared (which has the
1698same effect as saying C<sub name;>). If C<create> is not set and the
1699subroutine does not exist then NULL is returned.
1700
1701=cut
1702*/
1703
a0d0e21e 1704CV*
864dbfa3 1705Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW		 1706{
1707 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1708 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS		 1709 /* XXX this is probably not what they think they're getting.
1710 * It has the same effect as "sub name;", i.e. just a forward
1711 * declaration! */
8ebc5c01 1712 if (create && !GvCVu(gv))
774d564b 1713 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1714 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1715 Nullop,
a0d0e21e
LW		 1716 Nullop);
1717 if (gv)
8ebc5c01 1718 return GvCVu(gv);
a0d0e21e
LW		 1719 return Nullcv;
1720}
1721
79072805
LW		 1722/* Be sure to refetch the stack pointer after calling these routines. */
1723
954c1994
GS		 1724/*
1725=for apidoc p||call_argv
1726
1727Performs a callback to the specified Perl sub. See L<perlcall>.
1728
1729=cut
1730*/
1731
a0d0e21e 1732I32
864dbfa3 1733Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1734
8ac85365
NIS		 1735 /* See G_* flags in cop.h */
1736 /* null terminated arg list */
8990e307 1737{
a0d0e21e 1738 dSP;
8990e307 1739
924508f0 1740 PUSHMARK(SP);
a0d0e21e 1741 if (argv) {
8990e307 1742 while (*argv) {
a0d0e21e 1743 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW		 1744 argv++;
1745 }
a0d0e21e 1746 PUTBACK;
8990e307 1747 }
864dbfa3 1748 return call_pv(sub_name, flags);
8990e307
LW		 1749}
1750
954c1994
GS		 1751/*
1752=for apidoc p||call_pv
1753
1754Performs a callback to the specified Perl sub. See L<perlcall>.
1755
1756=cut
1757*/
1758
a0d0e21e 1759I32
864dbfa3 1760Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS		 1761 /* name of the subroutine */
1762 /* See G_* flags in cop.h */
a0d0e21e 1763{
864dbfa3 1764 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW		 1765}
1766
954c1994
GS		 1767/*
1768=for apidoc p||call_method
1769
1770Performs a callback to the specified Perl method. The blessed object must
1771be on the stack. See L<perlcall>.
1772
1773=cut
1774*/
1775
a0d0e21e 1776I32
864dbfa3 1777Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS		 1778 /* name of the subroutine */
1779 /* See G_* flags in cop.h */
a0d0e21e 1780{
968b3946 1781 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW		 1782}
1783
1784/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS		 1785/*
1786=for apidoc p||call_sv
1787
1788Performs a callback to the Perl sub whose name is in the SV. See
1789L<perlcall>.
1790
1791=cut
1792*/
1793
a0d0e21e 1794I32
864dbfa3 1795Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1796 /* See G_* flags in cop.h */
a0d0e21e 1797{
924508f0 1798 dSP;
a0d0e21e 1799 LOGOP myop; /* fake syntax tree node */
968b3946 1800 UNOP method_op;
aa689395 1801 I32 oldmark;
13689cfe 1802 volatile I32 retval = 0;
a0d0e21e 1803 I32 oldscope;
54310121 1804 bool oldcatch = CATCH_GET;
6224f72b 1805 int ret;
533c011a 1806 OP* oldop = PL_op;
db36c5a1 1807 dJMPENV;
1e422769 1808
a0d0e21e
LW		 1809 if (flags & G_DISCARD) {
1810 ENTER;
1811 SAVETMPS;
1812 }
1813
aa689395 1814 Zero(&myop, 1, LOGOP);
54310121 1815 myop.op_next = Nullop;
f51d4af5 1816 if (!(flags & G_NOARGS))
aa689395 1817 myop.op_flags |= OPf_STACKED;
54310121 1818 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1819 (flags & G_ARRAY) ? OPf_WANT_LIST :
1820 OPf_WANT_SCALAR);
462e5cf6 1821 SAVEOP();
533c011a 1822 PL_op = (OP*)&myop;
aa689395 1823
3280af22
NIS		 1824 EXTEND(PL_stack_sp, 1);
1825 *++PL_stack_sp = sv;
aa689395 1826 oldmark = TOPMARK;
3280af22 1827 oldscope = PL_scopestack_ix;
a0d0e21e 1828
3280af22 1829 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1830 /* Handle first BEGIN of -d. */
3280af22 1831 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24 1832 /* Try harder, since this may have been a sighandler, thus
1833 * curstash may be meaningless. */
3280af22 1834 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1835 && !(flags & G_NODEBUG))
533c011a 1836 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1837
968b3946
GS		 1838 if (flags & G_METHOD) {
1839 Zero(&method_op, 1, UNOP);
1840 method_op.op_next = PL_op;
1841 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1842 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1843 PL_op = (OP*)&method_op;
968b3946
GS		 1844 }
1845
312caa8e 1846 if (!(flags & G_EVAL)) {
0cdb2077 1847 CATCH_SET(TRUE);
14dd3ad8 1848 call_body((OP*)&myop, FALSE);
312caa8e 1849 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1850 CATCH_SET(oldcatch);
312caa8e
CS		 1851 }
1852 else {
d78bda3d 1853 myop.op_other = (OP*)&myop;
3280af22 1854 PL_markstack_ptr--;
4633a7c4
LW		 1855 /* we're trying to emulate pp_entertry() here */
1856 {
c09156bb 1857 register PERL_CONTEXT *cx;
54310121 1858 I32 gimme = GIMME_V;
ac27b0f5 1859
4633a7c4
LW		 1860 ENTER;
1861 SAVETMPS;
ac27b0f5 1862
968b3946 1863 push_return(Nullop);
1d76a5c3 1864 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1865 PUSHEVAL(cx, 0, 0);
533c011a 1866 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1867
faef0170 1868 PL_in_eval = EVAL_INEVAL;
4633a7c4 1869 if (flags & G_KEEPERR)
faef0170 1870 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1871 else
38a03e6e 1872 sv_setpv(ERRSV,"");
4633a7c4 1873 }
3280af22 1874 PL_markstack_ptr++;
a0d0e21e 1875
14dd3ad8
GS		 1876#ifdef PERL_FLEXIBLE_EXCEPTIONS
1877 redo_body:
1878 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1879 (OP*)&myop, FALSE);
14dd3ad8
GS		 1880#else
1881 JMPENV_PUSH(ret);
1882#endif
6224f72b
GS		 1883 switch (ret) {
1884 case 0:
14dd3ad8
GS		 1885#ifndef PERL_FLEXIBLE_EXCEPTIONS
1886 redo_body:
1887 call_body((OP*)&myop, FALSE);
1888#endif
312caa8e
CS		 1889 retval = PL_stack_sp - (PL_stack_base + oldmark);
1890 if (!(flags & G_KEEPERR))
1891 sv_setpv(ERRSV,"");
a0d0e21e 1892 break;
6224f72b 1893 case 1:
f86702cc 1894 STATUS_ALL_FAILURE;
a0d0e21e 1895 /* FALL THROUGH */
6224f72b 1896 case 2:
a0d0e21e 1897 /* my_exit() was called */
3280af22 1898 PL_curstash = PL_defstash;
a0d0e21e 1899 FREETMPS;
14dd3ad8 1900 JMPENV_POP;
cc3604b1 1901 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1902 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1903 my_exit_jump();
a0d0e21e 1904 /* NOTREACHED */
6224f72b 1905 case 3:
3280af22 1906 if (PL_restartop) {
533c011a 1907 PL_op = PL_restartop;
3280af22 1908 PL_restartop = 0;
312caa8e 1909 goto redo_body;
a0d0e21e 1910 }
3280af22 1911 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1912 if (flags & G_ARRAY)
1913 retval = 0;
1914 else {
1915 retval = 1;
3280af22 1916 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1917 }
312caa8e 1918 break;
a0d0e21e 1919 }
a0d0e21e 1920
3280af22 1921 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW		 1922 SV **newsp;
1923 PMOP *newpm;
1924 I32 gimme;
c09156bb 1925 register PERL_CONTEXT *cx;
a0a2876f
LW		 1926 I32 optype;
1927
1928 POPBLOCK(cx,newpm);
1929 POPEVAL(cx);
1930 pop_return();
3280af22 1931 PL_curpm = newpm;
a0a2876f 1932 LEAVE;
a0d0e21e 1933 }
14dd3ad8 1934 JMPENV_POP;
a0d0e21e 1935 }
1e422769 1936
a0d0e21e 1937 if (flags & G_DISCARD) {
3280af22 1938 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1939 retval = 0;
1940 FREETMPS;
1941 LEAVE;
1942 }
533c011a 1943 PL_op = oldop;
a0d0e21e
LW		 1944 return retval;
1945}
1946
14dd3ad8 1947#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1948STATIC void *
14dd3ad8 1949S_vcall_body(pTHX_ va_list args)
312caa8e
CS		 1950{
1951 OP *myop = va_arg(args, OP*);
1952 int is_eval = va_arg(args, int);
1953
14dd3ad8 1954 call_body(myop, is_eval);
312caa8e
CS		 1955 return NULL;
1956}
14dd3ad8 1957#endif
312caa8e
CS		 1958
1959STATIC void
14dd3ad8 1960S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1961{
312caa8e
CS		 1962 if (PL_op == myop) {
1963 if (is_eval)
f807eda9 1964 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1965 else
f807eda9 1966 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS		 1967 }
1968 if (PL_op)
cea2e8a9 1969 CALLRUNOPS(aTHX);
312caa8e
CS		 1970}
1971
6e72f9df 1972/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1973
954c1994
GS		 1974/*
1975=for apidoc p||eval_sv
1976
1977Tells Perl to C<eval> the string in the SV.
1978
1979=cut
1980*/
1981
a0d0e21e 1982I32
864dbfa3 1983Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1984
8ac85365 1985 /* See G_* flags in cop.h */
a0d0e21e 1986{
924508f0 1987 dSP;
a0d0e21e 1988 UNOP myop; /* fake syntax tree node */
8fa7f367 1989 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1990 volatile I32 retval = 0;
4633a7c4 1991 I32 oldscope;
6224f72b 1992 int ret;
533c011a 1993 OP* oldop = PL_op;
db36c5a1 1994 dJMPENV;
84902520 1995
4633a7c4
LW		 1996 if (flags & G_DISCARD) {
1997 ENTER;
1998 SAVETMPS;
1999 }
2000
462e5cf6 2001 SAVEOP();
533c011a
NIS		 2002 PL_op = (OP*)&myop;
2003 Zero(PL_op, 1, UNOP);
3280af22
NIS		 2004 EXTEND(PL_stack_sp, 1);
2005 *++PL_stack_sp = sv;
2006 oldscope = PL_scopestack_ix;
79072805 2007
4633a7c4
LW		 2008 if (!(flags & G_NOARGS))
2009 myop.op_flags = OPf_STACKED;
79072805 2010 myop.op_next = Nullop;
6e72f9df 2011 myop.op_type = OP_ENTEREVAL;
54310121 2012 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2013 (flags & G_ARRAY) ? OPf_WANT_LIST :
2014 OPf_WANT_SCALAR);
6e72f9df 2015 if (flags & G_KEEPERR)
2016 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2017
14dd3ad8 2018#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2019 redo_body:
14dd3ad8 2020 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2021 (OP*)&myop, TRUE);
14dd3ad8
GS		 2022#else
2023 JMPENV_PUSH(ret);
2024#endif
6224f72b
GS		 2025 switch (ret) {
2026 case 0:
14dd3ad8
GS		 2027#ifndef PERL_FLEXIBLE_EXCEPTIONS
2028 redo_body:
2029 call_body((OP*)&myop,TRUE);
2030#endif
312caa8e
CS		 2031 retval = PL_stack_sp - (PL_stack_base + oldmark);
2032 if (!(flags & G_KEEPERR))
2033 sv_setpv(ERRSV,"");
4633a7c4 2034 break;
6224f72b 2035 case 1:
f86702cc 2036 STATUS_ALL_FAILURE;
4633a7c4 2037 /* FALL THROUGH */
6224f72b 2038 case 2:
4633a7c4 2039 /* my_exit() was called */
3280af22 2040 PL_curstash = PL_defstash;
4633a7c4 2041 FREETMPS;
14dd3ad8 2042 JMPENV_POP;
cc3604b1 2043 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2044 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2045 my_exit_jump();
4633a7c4 2046 /* NOTREACHED */
6224f72b 2047 case 3:
3280af22 2048 if (PL_restartop) {
533c011a 2049 PL_op = PL_restartop;
3280af22 2050 PL_restartop = 0;
312caa8e 2051 goto redo_body;
4633a7c4 2052 }
3280af22 2053 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2054 if (flags & G_ARRAY)
2055 retval = 0;
2056 else {
2057 retval = 1;
3280af22 2058 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2059 }
312caa8e 2060 break;
4633a7c4
LW		 2061 }
2062
14dd3ad8 2063 JMPENV_POP;
4633a7c4 2064 if (flags & G_DISCARD) {
3280af22 2065 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2066 retval = 0;
2067 FREETMPS;
2068 LEAVE;
2069 }
533c011a 2070 PL_op = oldop;
4633a7c4
LW		 2071 return retval;
2072}
2073
954c1994
GS		 2074/*
2075=for apidoc p||eval_pv
2076
2077Tells Perl to C<eval> the given string and return an SV* result.
2078
2079=cut
2080*/
2081
137443ea 2082SV*
864dbfa3 2083Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 2084{
2085 dSP;
2086 SV* sv = newSVpv(p, 0);
2087
864dbfa3 2088 eval_sv(sv, G_SCALAR);
137443ea 2089 SvREFCNT_dec(sv);
2090
2091 SPAGAIN;
2092 sv = POPs;
2093 PUTBACK;
2094
2d8e6c8d
GS		 2095 if (croak_on_error && SvTRUE(ERRSV)) {
2096 STRLEN n_a;
cea2e8a9 2097 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2098 }
137443ea 2099
2100 return sv;
2101}
2102
4633a7c4
LW		 2103/* Require a module. */
2104
954c1994
GS		 2105/*
2106=for apidoc p||require_pv
2107
7d3fb230
BS		 2108Tells Perl to C<require> the file named by the string argument. It is
2109analogous to the Perl code C<eval "require '$file'">. It's even
2110implemented that way; consider using Perl_load_module instead.
954c1994 2111
7d3fb230 2112=cut */
954c1994 2113
4633a7c4 2114void
864dbfa3 2115Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2116{
d3acc0f7
JP		 2117 SV* sv;
2118 dSP;
e788e7d3 2119 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP		 2120 PUTBACK;
2121 sv = sv_newmortal();
4633a7c4
LW		 2122 sv_setpv(sv, "require '");
2123 sv_catpv(sv, pv);
2124 sv_catpv(sv, "'");
864dbfa3 2125 eval_sv(sv, G_DISCARD);
d3acc0f7
JP		 2126 SPAGAIN;
2127 POPSTACK;
79072805
LW		 2128}
2129
79072805 2130void
864dbfa3 2131Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW		 2132{
2133 register GV *gv;
2134
155aba94 2135 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2136 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW		 2137}
2138
76e3520e 2139STATIC void
cea2e8a9 2140S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2141{
ab821d7f 2142 /* This message really ought to be max 23 lines.
75c72d73 2143 * Removed -h because the user already knows that option. Others? */
fb73857a 2144
76e3520e 2145 static char *usage_msg[] = {
fb73857a 2146"-0[octal] specify record separator (\\0, if no argument)",
2147"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2148"-C enable native wide character system interfaces",
1950ee41 2149"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS		 2150"-d[:debugger] run program under debugger",
2151"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2152"-e 'command' one line of program (several -e's allowed, omit programfile)",
2153"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2154"-i[extension] edit <> files in place (makes backup if extension supplied)",
2155"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2156"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS		 2157"-[mM][-]module execute `use/no module...' before executing program",
2158"-n assume 'while (<>) { ... }' loop around program",
2159"-p assume loop like -n but print line also, like sed",
2160"-P run program through C preprocessor before compilation",
2161"-s enable rudimentary parsing for switches after programfile",
2162"-S look for programfile using PATH environment variable",
2163"-T enable tainting checks",
2164"-u dump core after parsing program",
fb73857a 2165"-U allow unsafe operations",
aac3bd0d
GS		 2166"-v print version, subversion (includes VERY IMPORTANT perl info)",
2167"-V[:variable] print configuration summary (or a single Config.pm variable)",
2168"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS		 2169"-W enable all warnings",
2170"-X disable all warnings",
fb73857a 2171"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2172"\n",
2173NULL
2174};
76e3520e 2175 char **p = usage_msg;
fb73857a 2176
b0e47665
GS		 2177 PerlIO_printf(PerlIO_stdout(),
2178 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2179 name);
fb73857a 2180 while (*p)
b0e47665 2181 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW		 2182}
2183
79072805
LW		 2184/* This routine handles any switches that can be given during run */
2185
2186char *
864dbfa3 2187Perl_moreswitches(pTHX_ char *s)
79072805 2188{
ba210ebe 2189 STRLEN numlen;
c07a80fd 2190 U32 rschar;
79072805
LW		 2191
2192 switch (*s) {
2193 case '0':
a863c7d1 2194 {
53305cf1
NC		 2195 I32 flags = 0;
2196 numlen = 4;
2197 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
8bfdd7d9 2198 SvREFCNT_dec(PL_rs);
c07a80fd 2199 if (rschar & ~((U8)~0))
8bfdd7d9 2200 PL_rs = &PL_sv_undef;
c07a80fd 2201 else if (!rschar && numlen >= 2)
8bfdd7d9 2202 PL_rs = newSVpvn("", 0);
c07a80fd 2203 else {
2204 char ch = rschar;
8bfdd7d9 2205 PL_rs = newSVpvn(&ch, 1);
79072805
LW		 2206 }
2207 return s + numlen;
a863c7d1 2208 }
46487f74
GS		 2209 case 'C':
2210 PL_widesyscalls = TRUE;
2211 s++;
2212 return s;
2304df62 2213 case 'F':
3280af22 2214 PL_minus_F = TRUE;
ebce5377
RGS		 2215 PL_splitstr = ++s;
2216 while (*s && !isSPACE(*s)) ++s;
2217 *s = '\0';
2218 PL_splitstr = savepv(PL_splitstr);
2304df62 2219 return s;
79072805 2220 case 'a':
3280af22 2221 PL_minus_a = TRUE;
79072805
LW		 2222 s++;
2223 return s;
2224 case 'c':
3280af22 2225 PL_minus_c = TRUE;
79072805
LW		 2226 s++;
2227 return s;
2228 case 'd':
bbce6d69 2229 forbid_setid("-d");
4633a7c4 2230 s++;
70c94a19
RR		 2231 /* The following permits -d:Mod to accepts arguments following an =
2232 in the fashion that -MSome::Mod does. */
2233 if (*s == ':' || *s == '=') {
2234 char *start;
2235 SV *sv;
2236 sv = newSVpv("use Devel::", 0);
2237 start = ++s;
2238 /* We now allow -d:Module=Foo,Bar */
2239 while(isALNUM(*s) || *s==':') ++s;
2240 if (*s != '=')
2241 sv_catpv(sv, start);
2242 else {
2243 sv_catpvn(sv, start, s-start);
2244 sv_catpv(sv, " split(/,/,q{");
2245 sv_catpv(sv, ++s);
2246 sv_catpv(sv, "})");
2247 }
4633a7c4 2248 s += strlen(s);
70c94a19 2249 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2250 }
ed094faf 2251 if (!PL_perldb) {
3280af22 2252 PL_perldb = PERLDB_ALL;
a0d0e21e 2253 init_debugger();
ed094faf 2254 }
79072805
LW		 2255 return s;
2256 case 'D':
0453d815 2257 {
79072805 2258#ifdef DEBUGGING
bbce6d69 2259 forbid_setid("-D");
79072805 2260 if (isALPHA(s[1])) {
04932ac8
DM		 2261 /* if adding extra options, remember to update DEBUG_MASK */
2262 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW		 2263 char *d;
2264
93a17b20 2265 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2266 PL_debug |= 1 << (d - debopts);
79072805
LW		 2267 }
2268 else {
3280af22 2269 PL_debug = atoi(s+1);
79072805
LW		 2270 for (s++; isDIGIT(*s); s++) ;
2271 }
aea4f609 2272 PL_debug |= DEBUG_TOP_FLAG;
79072805 2273#else
0453d815
PM		 2274 if (ckWARN_d(WARN_DEBUGGING))
2275 Perl_warner(aTHX_ WARN_DEBUGGING,
2276 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2277 for (s++; isALNUM(*s); s++) ;
79072805
LW		 2278#endif
2279 /*SUPPRESS 530*/
2280 return s;
0453d815 2281 }
4633a7c4 2282 case 'h':
ac27b0f5 2283 usage(PL_origargv[0]);
6ad3d225 2284 PerlProc_exit(0);
79072805 2285 case 'i':
3280af22
NIS		 2286 if (PL_inplace)
2287 Safefree(PL_inplace);
2288 PL_inplace = savepv(s+1);
79072805 2289 /*SUPPRESS 530*/
3280af22 2290 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2291 if (*s) {
fb73857a 2292 *s++ = '\0';
7b8d334a
GS		 2293 if (*s == '-') /* Additional switches on #! line. */
2294 s++;
2295 }
fb73857a 2296 return s;
4e49a025 2297 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2298 forbid_setid("-I");
fb73857a 2299 ++s;
2300 while (*s && isSPACE(*s))
2301 ++s;
2302 if (*s) {
774d564b 2303 char *e, *p;
0df16ed7
GS		 2304 p = s;
2305 /* ignore trailing spaces (possibly followed by other switches) */
2306 do {
2307 for (e = p; *e && !isSPACE(*e); e++) ;
2308 p = e;
2309 while (isSPACE(*p))
2310 p++;
2311 } while (*p && *p != '-');
2312 e = savepvn(s, e-s);
9c8a64f0 2313 incpush(e, TRUE, TRUE);
0df16ed7
GS		 2314 Safefree(e);
2315 s = p;
2316 if (*s == '-')
2317 s++;
79072805
LW		 2318 }
2319 else
a67e862a 2320 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2321 return s;
79072805 2322 case 'l':
3280af22 2323 PL_minus_l = TRUE;
79072805 2324 s++;
7889fe52
NIS		 2325 if (PL_ors_sv) {
2326 SvREFCNT_dec(PL_ors_sv);
2327 PL_ors_sv = Nullsv;
2328 }
79072805 2329 if (isDIGIT(*s)) {
53305cf1 2330 I32 flags = 0;
7889fe52 2331 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC		 2332 numlen = 3 + (*s == '0');
2333 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW		 2334 s += numlen;
2335 }
2336 else {
8bfdd7d9 2337 if (RsPARA(PL_rs)) {
7889fe52
NIS		 2338 PL_ors_sv = newSVpvn("\n\n",2);
2339 }
2340 else {
8bfdd7d9 2341 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2342 }
79072805
LW		 2343 }
2344 return s;
1a30305b 2345 case 'M':
bbce6d69 2346 forbid_setid("-M"); /* XXX ? */
1a30305b 2347 /* FALL THROUGH */
2348 case 'm':
bbce6d69 2349 forbid_setid("-m"); /* XXX ? */
1a30305b 2350 if (*++s) {
a5f75d66 2351 char *start;
11343788 2352 SV *sv;
a5f75d66
AD		 2353 char *use = "use ";
2354 /* -M-foo == 'no foo' */
2355 if (*s == '-') { use = "no "; ++s; }
11343788 2356 sv = newSVpv(use,0);
a5f75d66 2357 start = s;
1a30305b 2358 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd 2359 while(isALNUM(*s) || *s==':') ++s;
2360 if (*s != '=') {
11343788 2361 sv_catpv(sv, start);
c07a80fd 2362 if (*(start-1) == 'm') {
2363 if (*s != '\0')
cea2e8a9 2364 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2365 sv_catpv( sv, " ()");
c07a80fd 2366 }
2367 } else {
6df41af2 2368 if (s == start)
be98fb35
GS		 2369 Perl_croak(aTHX_ "Module name required with -%c option",
2370 s[-1]);
11343788
MB		 2371 sv_catpvn(sv, start, s-start);
2372 sv_catpv(sv, " split(/,/,q{");
2373 sv_catpv(sv, ++s);
2374 sv_catpv(sv, "})");
c07a80fd 2375 }
1a30305b 2376 s += strlen(s);
5c831c24 2377 if (!PL_preambleav)
3280af22
NIS		 2378 PL_preambleav = newAV();
2379 av_push(PL_preambleav, sv);
1a30305b 2380 }
2381 else
cea2e8a9 2382 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2383 return s;
79072805 2384 case 'n':
3280af22 2385 PL_minus_n = TRUE;
79072805
LW		 2386 s++;
2387 return s;
2388 case 'p':
3280af22 2389 PL_minus_p = TRUE;
79072805
LW		 2390 s++;
2391 return s;
2392 case 's':
bbce6d69 2393 forbid_setid("-s");
3280af22 2394 PL_doswitches = TRUE;
79072805
LW		 2395 s++;
2396 return s;
6537fe72
MS		 2397 case 't':
2398 if (!PL_tainting)
2399 Perl_croak(aTHX_ "Too late for \"-t\" option");
2400 s++;
2401 return s;
463ee0b2 2402 case 'T':
3280af22 2403 if (!PL_tainting)
cea2e8a9 2404 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW		 2405 s++;
2406 return s;
79072805 2407 case 'u':
bf4acbe4
GS		 2408#ifdef MACOS_TRADITIONAL
2409 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2410#endif
3280af22 2411 PL_do_undump = TRUE;
79072805
LW		 2412 s++;
2413 return s;
2414 case 'U':
3280af22 2415 PL_unsafe = TRUE;
79072805
LW		 2416 s++;
2417 return s;
2418 case 'v':
8e9464f1 2419#if !defined(DGUX)
b0e47665 2420 PerlIO_printf(PerlIO_stdout(),
d2560b70 2421 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2422 PL_patchlevel, ARCHNAME));
8e9464f1
JH		 2423#else /* DGUX */
2424/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2425 PerlIO_printf(PerlIO_stdout(),
2426 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2427 PerlIO_printf(PerlIO_stdout(),
2428 Perl_form(aTHX_ " built under %s at %s %s\n",
2429 OSNAME, __DATE__, __TIME__));
2430 PerlIO_printf(PerlIO_stdout(),
2431 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2432 OSVERS));
8e9464f1
JH		 2433#endif /* !DGUX */
2434
fb73857a 2435#if defined(LOCAL_PATCH_COUNT)
2436 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS		 2437 PerlIO_printf(PerlIO_stdout(),
2438 "\n(with %d registered patch%s, "
2439 "see perl -V for more detail)",
2440 (int)LOCAL_PATCH_COUNT,
2441 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2442#endif
1a30305b 2443
b0e47665 2444 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2445 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH		 2446#ifdef MACOS_TRADITIONAL
2447 PerlIO_printf(PerlIO_stdout(),
03765510
JH		 2448 "\nMac OS port Copyright 1991-2001, Matthias Neeracher;\n"
2449 "maintained by Chris Nandor\n");
eae9c151 2450#endif
79072805 2451#ifdef MSDOS
b0e47665
GS		 2452 PerlIO_printf(PerlIO_stdout(),
2453 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff 2454#endif
2455#ifdef DJGPP
b0e47665
GS		 2456 PerlIO_printf(PerlIO_stdout(),
2457 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2458 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2459#endif
79072805 2460#ifdef OS2
b0e47665
GS		 2461 PerlIO_printf(PerlIO_stdout(),
2462 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2463 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2464#endif
79072805 2465#ifdef atarist
b0e47665
GS		 2466 PerlIO_printf(PerlIO_stdout(),
2467 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2468#endif
a3f9223b 2469#ifdef __BEOS__
b0e47665
GS		 2470 PerlIO_printf(PerlIO_stdout(),
2471 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2472#endif
1d84e8df 2473#ifdef MPE
b0e47665 2474 PerlIO_printf(PerlIO_stdout(),
dc22e1c4 2475 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2001\n");
1d84e8df 2476#endif
9d116dd7 2477#ifdef OEMVS
b0e47665
GS		 2478 PerlIO_printf(PerlIO_stdout(),
2479 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2480#endif
495c5fdc 2481#ifdef __VOS__
b0e47665
GS		 2482 PerlIO_printf(PerlIO_stdout(),
2483 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2484#endif
092bebab 2485#ifdef __OPEN_VM
b0e47665
GS		 2486 PerlIO_printf(PerlIO_stdout(),
2487 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2488#endif
a1a0e61e 2489#ifdef POSIX_BC
b0e47665
GS		 2490 PerlIO_printf(PerlIO_stdout(),
2491 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2492#endif
61ae2fbf 2493#ifdef __MINT__
b0e47665
GS		 2494 PerlIO_printf(PerlIO_stdout(),
2495 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2496#endif
f83d2536 2497#ifdef EPOC
b0e47665
GS		 2498 PerlIO_printf(PerlIO_stdout(),
2499 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2500#endif
e1caacb4
JH		 2501#ifdef UNDER_CE
2502 printf("WINCE port by Rainer Keuchel, 2001\n");
2503 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2504 wce_hitreturn();
2505#endif
baed7233
DL		 2506#ifdef BINARY_BUILD_NOTICE
2507 BINARY_BUILD_NOTICE;
2508#endif
b0e47665
GS		 2509 PerlIO_printf(PerlIO_stdout(),
2510 "\n\
79072805 2511Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2512GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS		 2513Complete documentation for Perl, including FAQ lists, should be found on\n\
2514this system using `man perl' or `perldoc perl'. If you have access to the\n\
2515Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2516 PerlProc_exit(0);
79072805 2517 case 'w':
599cee73 2518 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2519 PL_dowarn |= G_WARN_ON;
599cee73
PM		 2520 s++;
2521 return s;
2522 case 'W':
ac27b0f5 2523 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS		 2524 if (!specialWARN(PL_compiling.cop_warnings))
2525 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2526 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM		 2527 s++;
2528 return s;
2529 case 'X':
ac27b0f5 2530 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS		 2531 if (!specialWARN(PL_compiling.cop_warnings))
2532 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2533 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW		 2534 s++;
2535 return s;
a0d0e21e 2536 case '*':
79072805
LW		 2537 case ' ':
2538 if (s[1] == '-') /* Additional switches on #! line. */
2539 return s+2;
2540 break;
a0d0e21e 2541 case '-':
79072805 2542 case 0:
51882d45 2543#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS		 2544 case '\r':
2545#endif
79072805
LW		 2546 case '\n':
2547 case '\t':
2548 break;
aa689395 2549#ifdef ALTERNATE_SHEBANG
2550 case 'S': /* OS/2 needs -S on "extproc" line. */
2551 break;
2552#endif
a0d0e21e 2553 case 'P':
3280af22 2554 if (PL_preprocess)
a0d0e21e
LW		 2555 return s+1;
2556 /* FALL THROUGH */
79072805 2557 default:
cea2e8a9 2558 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW		 2559 }
2560 return Nullch;
2561}
2562
2563/* compliments of Tom Christiansen */
2564
2565/* unexec() can be found in the Gnu emacs distribution */
ee580363 2566/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW		 2567
2568void
864dbfa3 2569Perl_my_unexec(pTHX)
79072805
LW		 2570{
2571#ifdef UNEXEC
46fc3d4c 2572 SV* prog;
2573 SV* file;
ee580363 2574 int status = 1;
79072805
LW		 2575 extern int etext;
2576
ee580363 2577 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2578 sv_catpv(prog, "/perl");
6b88bc9c 2579 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2580 sv_catpv(file, ".perldump");
79072805 2581
ee580363
GS		 2582 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2583 /* unexec prints msg to stderr in case of failure */
6ad3d225 2584 PerlProc_exit(status);
79072805 2585#else
a5f75d66
AD		 2586# ifdef VMS
2587# include <lib$routines.h>
2588 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2589# else
79072805 2590 ABORT(); /* for use with undump */
aa689395 2591# endif
a5f75d66 2592#endif
79072805
LW		 2593}
2594
cb68f92d
GS		 2595/* initialize curinterp */
2596STATIC void
cea2e8a9 2597S_init_interp(pTHX)
cb68f92d
GS		 2598{
2599
acfe0abc
GS		 2600#ifdef MULTIPLICITY
2601# define PERLVAR(var,type)
2602# define PERLVARA(var,n,type)
2603# if defined(PERL_IMPLICIT_CONTEXT)
2604# if defined(USE_5005THREADS)
2605# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2606# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS		 2607# else /* !USE_5005THREADS */
2608# define PERLVARI(var,type,init) aTHX->var = init;
2609# define PERLVARIC(var,type,init) aTHX->var = init;
2610# endif /* USE_5005THREADS */
3967c732 2611# else
acfe0abc
GS		 2612# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2613# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2614# endif
acfe0abc
GS		 2615# include "intrpvar.h"
2616# ifndef USE_5005THREADS
2617# include "thrdvar.h"
2618# endif
2619# undef PERLVAR
2620# undef PERLVARA
2621# undef PERLVARI
2622# undef PERLVARIC
2623#else
2624# define PERLVAR(var,type)
2625# define PERLVARA(var,n,type)
2626# define PERLVARI(var,type,init) PL_##var = init;
2627# define PERLVARIC(var,type,init) PL_##var = init;
2628# include "intrpvar.h"
2629# ifndef USE_5005THREADS
2630# include "thrdvar.h"
2631# endif
2632# undef PERLVAR
2633# undef PERLVARA
2634# undef PERLVARI
2635# undef PERLVARIC
cb68f92d
GS		 2636#endif
2637
cb68f92d
GS		 2638}
2639
76e3520e 2640STATIC void
cea2e8a9 2641S_init_main_stash(pTHX)
79072805 2642{
463ee0b2 2643 GV *gv;
6e72f9df 2644
3d47000e 2645
ac27b0f5 2646
3280af22 2647 PL_curstash = PL_defstash = newHV();
79cb57f6 2648 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW		 2649 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2650 SvREFCNT_dec(GvHV(gv));
3280af22 2651 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2652 SvREADONLY_on(gv);
3280af22
NIS		 2653 HvNAME(PL_defstash) = savepv("main");
2654 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2655 GvMULTI_on(PL_incgv);
2656 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2657 GvMULTI_on(PL_hintgv);
2658 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2659 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2660 GvMULTI_on(PL_errgv);
2661 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2662 GvMULTI_on(PL_replgv);
cea2e8a9 2663 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB		 2664 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2665 sv_setpvn(ERRSV, "", 0);
3280af22 2666 PL_curstash = PL_defstash;
11faa288 2667 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2668 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2669 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2670 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2671 /* We must init $/ before switches are processed. */
864dbfa3 2672 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW		 2673}
2674
76e3520e 2675STATIC void
cea2e8a9 2676S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2677{
1b24ed4b
MS		 2678 char *quote;
2679 char *code;
2680 char *cpp_discard_flag;
2681 char *perl;
2682
6c4ab083 2683 *fdscript = -1;
79072805 2684
3280af22
NIS		 2685 if (PL_e_script) {
2686 PL_origfilename = savepv("-e");
96436eeb 2687 }
6c4ab083
GS		 2688 else {
2689 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2690 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS		 2691
2692 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2693 char *s = scriptname + 8;
2694 *fdscript = atoi(s);
2695 while (isDIGIT(*s))
2696 s++;
2697 if (*s) {
2698 scriptname = savepv(s + 1);
3280af22
NIS		 2699 Safefree(PL_origfilename);
2700 PL_origfilename = scriptname;
6c4ab083
GS		 2701 }
2702 }
2703 }
2704
1b24ed4b
MS		 2705# ifdef USE_ITHREADS
2706 Safefree(CopFILE(PL_curcop));
2707# else
2708 SvREFCNT_dec(CopFILEGV(PL_curcop));
2709# endif
57843af0 2710 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2711 if (strEQ(PL_origfilename,"-"))
79072805 2712 scriptname = "";
01f988be 2713 if (*fdscript >= 0) {
3280af22 2714 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS		 2715# if defined(HAS_FCNTL) && defined(F_SETFD)
2716 if (PL_rsfp)
2717 /* ensure close-on-exec */
2718 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2719# endif
96436eeb 2720 }
3280af22 2721 else if (PL_preprocess) {
46fc3d4c 2722 char *cpp_cfg = CPPSTDIN;
79cb57f6 2723 SV *cpp = newSVpvn("",0);
46fc3d4c 2724 SV *cmd = NEWSV(0,0);
2725
2726 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2727 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2728 sv_catpv(cpp, cpp_cfg);
79072805 2729
1b24ed4b
MS		 2730# ifndef VMS
2731 sv_catpvn(sv, "-I", 2);
2732 sv_catpv(sv,PRIVLIB_EXP);
2733# endif
46fc3d4c 2734
14953ddc
MB		 2735 DEBUG_P(PerlIO_printf(Perl_debug_log,
2736 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2737 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS		 2738
2739# if defined(MSDOS) || defined(WIN32) || defined(VMS)
2740 quote = "\"";
2741# else
2742 quote = "'";
2743# endif
2744
2745# ifdef VMS
2746 cpp_discard_flag = "";
2747# else
2748 cpp_discard_flag = "-C";
2749# endif
2750
2751# ifdef OS2
2752 perl = os2_execname(aTHX);
2753# else
2754 perl = PL_origargv[0];
2755# endif
2756
2757
2758 /* This strips off Perl comments which might interfere with
2759 the C pre-processor, including #!. #line directives are
2760 deliberately stripped to avoid confusion with Perl's version
2761 of #line. FWP played some golf with it so it will fit
2762 into VMS's 255 character buffer.
2763 */
2764 if( PL_doextract )
2765 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2766 else
2767 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2768
2769 Perl_sv_setpvf(aTHX_ cmd, "\
2770%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
2771 perl, quote, code, quote, scriptname, cpp,
2772 cpp_discard_flag, sv, CPPMINUS);
2773
3280af22 2774 PL_doextract = FALSE;
1b24ed4b
MS		 2775# ifdef IAMSUID /* actually, this is caught earlier */
2776 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2777# ifdef HAS_SETEUID
2778 (void)seteuid(PL_uid); /* musn't stay setuid root */
2779# else
2780# ifdef HAS_SETREUID
2781 (void)setreuid((Uid_t)-1, PL_uid);
2782# else
2783# ifdef HAS_SETRESUID
2784 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2785# else
2786 PerlProc_setuid(PL_uid);
2787# endif
2788# endif
2789# endif
b28d0864 2790 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2791 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805 2792 }
1b24ed4b 2793# endif /* IAMSUID */
0a6c758d 2794
1b24ed4b
MS		 2795 DEBUG_P(PerlIO_printf(Perl_debug_log,
2796 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS		 2797 SvPVX(cmd)));
2798
3280af22 2799 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c 2800 SvREFCNT_dec(cmd);
2801 SvREFCNT_dec(cpp);
79072805
LW		 2802 }
2803 else if (!*scriptname) {
bbce6d69 2804 forbid_setid("program input from stdin");
3280af22 2805 PL_rsfp = PerlIO_stdin();
79072805 2806 }
96436eeb 2807 else {
3280af22 2808 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS		 2809# if defined(HAS_FCNTL) && defined(F_SETFD)
2810 if (PL_rsfp)
2811 /* ensure close-on-exec */
2812 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2813# endif
96436eeb 2814 }
3280af22 2815 if (!PL_rsfp) {
1b24ed4b
MS		 2816# ifdef DOSUID
2817# ifndef IAMSUID /* in case script is not readable before setuid */
2818 if (PL_euid &&
2819 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
2820 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2821 {
2822 /* try again */
2823 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT,
2824 BIN_EXP, (int)PERL_REVISION,
2825 (int)PERL_VERSION,
2826 (int)PERL_SUBVERSION), PL_origargv);
2827 Perl_croak(aTHX_ "Can't do setuid\n");
2828 }
2829# endif
2830# endif
2831# ifdef IAMSUID
2832 errno = EPERM;
2833 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2834 Strerror(errno));
2835# else
2836 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
2837 CopFILE(PL_curcop), Strerror(errno));
2838# endif
13281fa4 2839 }
79072805 2840}
8d063cd8 2841
7b89560d
JH		 2842/* Mention
2843 * I_SYSSTATVFS HAS_FSTATVFS
2844 * I_SYSMOUNT
c890dc6c 2845 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH		 2846 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2847 * here so that metaconfig picks them up. */
2848
104d25b7 2849#ifdef IAMSUID
864dbfa3 2850STATIC int
e688b231 2851S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2852{
0545a864
JH		 2853 int check_okay = 0; /* able to do all the required sys/libcalls */
2854 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2855/*
ad27e871 2856 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2857 * fstatvfs() is UNIX98.
0545a864 2858 * fstatfs() is 4.3 BSD.
ad27e871 2859 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH		 2860 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2861 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH		 2862 */
2863
6439433f
JH		 2864#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2865
2866# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2867 defined(HAS_FSTATVFS)
2868# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2869 struct statvfs stfs;
6439433f 2870
104d25b7
JH		 2871 check_okay = fstatvfs(fd, &stfs) == 0;
2872 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2873# endif /* fstatvfs */
ac27b0f5 2874
6439433f
JH		 2875# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2876 defined(PERL_MOUNT_NOSUID) && \
2877 defined(HAS_FSTATFS) && \
2878 defined(HAS_STRUCT_STATFS) && \
2879 defined(HAS_STRUCT_STATFS_F_FLAGS)
2880# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2881 struct statfs stfs;
6439433f 2882
104d25b7 2883 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2884 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH		 2885# endif /* fstatfs */
2886
2887# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2888 defined(PERL_MOUNT_NOSUID) && \
2889 defined(HAS_FSTAT) && \
2890 defined(HAS_USTAT) && \
2891 defined(HAS_GETMNT) && \
2892 defined(HAS_STRUCT_FS_DATA) && \
2893 defined(NOSTAT_ONE)
2894# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2895 struct stat fdst;
6439433f 2896
0545a864 2897 if (fstat(fd, &fdst) == 0) {
6439433f
JH		 2898 struct ustat us;
2899 if (ustat(fdst.st_dev, &us) == 0) {
2900 struct fs_data fsd;
2901 /* NOSTAT_ONE here because we're not examining fields which
2902 * vary between that case and STAT_ONE. */
ad27e871 2903 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH		 2904 size_t cmplen = sizeof(us.f_fname);
2905 if (sizeof(fsd.fd_req.path) < cmplen)
2906 cmplen = sizeof(fsd.fd_req.path);
2907 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2908 fdst.st_dev == fsd.fd_req.dev) {
2909 check_okay = 1;
2910 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2911 }
2912 }
2913 }
2914 }
0545a864 2915 }
6439433f
JH		 2916# endif /* fstat+ustat+getmnt */
2917
2918# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2919 defined(HAS_GETMNTENT) && \
2920 defined(HAS_HASMNTOPT) && \
2921 defined(MNTOPT_NOSUID)
2922# define FD_ON_NOSUID_CHECK_OKAY
2923 FILE *mtab = fopen("/etc/mtab", "r");
2924 struct mntent *entry;
2925 struct stat stb, fsb;
104d25b7
JH		 2926
2927 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH		 2928 while (entry = getmntent(mtab)) {
2929 if (stat(entry->mnt_dir, &fsb) == 0
2930 && fsb.st_dev == stb.st_dev)
2931 {
2932 /* found the filesystem */
2933 check_okay = 1;
2934 if (hasmntopt(entry, MNTOPT_NOSUID))
2935 on_nosuid = 1;
2936 break;
2937 } /* A single fs may well fail its stat(). */
2938 }
104d25b7
JH		 2939 }
2940 if (mtab)
6439433f
JH		 2941 fclose(mtab);
2942# endif /* getmntent+hasmntopt */
0545a864 2943
ac27b0f5 2944 if (!check_okay)
0545a864 2945 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH		 2946 return on_nosuid;
2947}
2948#endif /* IAMSUID */
2949
76e3520e 2950STATIC void
cea2e8a9 2951S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2952{
155aba94 2953#ifdef IAMSUID
96436eeb 2954 int which;
155aba94 2955#endif
96436eeb 2956
13281fa4
LW		 2957 /* do we need to emulate setuid on scripts? */
2958
2959 /* This code is for those BSD systems that have setuid #! scripts disabled
2960 * in the kernel because of a security problem. Merely defining DOSUID
2961 * in perl will not fix that problem, but if you have disabled setuid
2962 * scripts in the kernel, this will attempt to emulate setuid and setgid
2963 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW		 2964 * root version must be called suidperl or sperlN.NNN. If regular perl
2965 * discovers that it has opened a setuid script, it calls suidperl with
2966 * the same argv that it had. If suidperl finds that the script it has
2967 * just opened is NOT setuid root, it sets the effective uid back to the
2968 * uid. We don't just make perl setuid root because that loses the
2969 * effective uid we had before invoking perl, if it was different from the
2970 * uid.
13281fa4
LW		 2971 *
2972 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2973 * be defined in suidperl only. suidperl must be setuid root. The
2974 * Configure script will set this up for you if you want it.
2975 */
a687059c 2976
13281fa4 2977#ifdef DOSUID
6e72f9df 2978 char *s, *s2;
a0d0e21e 2979
b28d0864 2980 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2981 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2982 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2983 I32 len;
2d8e6c8d 2984 STRLEN n_a;
13281fa4 2985
a687059c 2986#ifdef IAMSUID
fe14fcc3 2987#ifndef HAS_SETREUID
a687059c
LW		 2988 /* On this access check to make sure the directories are readable,
2989 * there is actually a small window that the user could use to make
2990 * filename point to an accessible directory. So there is a faint
2991 * chance that someone could execute a setuid script down in a
2992 * non-accessible directory. I don't know what to do about that.
2993 * But I don't think it's too important. The manual lies when
2994 * it says access() is useful in setuid programs.
2995 */
cc49e20b 2996 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2997 Perl_croak(aTHX_ "Permission denied");
a687059c
LW		 2998#else
2999 /* If we can swap euid and uid, then we can determine access rights
3000 * with a simple stat of the file, and then compare device and
3001 * inode to make sure we did stat() on the same file we opened.
3002 * Then we just have to make sure he or she can execute it.
3003 */
3004 {
3005 struct stat tmpstatbuf;
3006
85e6fe83
LW		 3007 if (
3008#ifdef HAS_SETREUID
b28d0864 3009 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW		 3010#else
3011# if HAS_SETRESUID
b28d0864 3012 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 3013# endif
85e6fe83 3014#endif
b28d0864 3015 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 3016 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 3017 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 3018 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 3019#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 3020 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 3021 Perl_croak(aTHX_ "Permission denied");
104d25b7 3022#endif
b28d0864
NIS		 3023 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3024 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3025 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3026 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3027 }
85e6fe83
LW		 3028 if (
3029#ifdef HAS_SETREUID
b28d0864 3030 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW		 3031#else
3032# if defined(HAS_SETRESUID)
b28d0864 3033 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3034# endif
85e6fe83 3035#endif
b28d0864 3036 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3037 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3038 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3039 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3040 }
fe14fcc3 3041#endif /* HAS_SETREUID */
a687059c
LW		 3042#endif /* IAMSUID */
3043
b28d0864 3044 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3045 Perl_croak(aTHX_ "Permission denied");
b28d0864 3046 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3047 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3048 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3049 CopLINE_inc(PL_curcop);
6b88bc9c 3050 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3051 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3052 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3053 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3054 if (*s == ' ') s++;
45d8adaa 3055 while (!isSPACE(*s)) s++;
2d8e6c8d 3056 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df 3057 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3058 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3059 Perl_croak(aTHX_ "Not a perl script");
a687059c 3060 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW		 3061 /*
3062 * #! arg must be what we saw above. They can invoke it by
3063 * mentioning suidperl explicitly, but they may not add any strange
3064 * arguments beyond what #! says if they do invoke suidperl that way.
3065 */
3066 len = strlen(validarg);
3067 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3068 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3069 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW		 3070
3071#ifndef IAMSUID
b28d0864
NIS		 3072 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3073 PL_euid == PL_statbuf.st_uid)
3074 if (!PL_do_undump)
cea2e8a9 3075 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3076FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3077#endif /* IAMSUID */
13281fa4 3078
b28d0864
NIS		 3079 if (PL_euid) { /* oops, we're not the setuid root perl */
3080 (void)PerlIO_close(PL_rsfp);
13281fa4 3081#ifndef IAMSUID
46fc3d4c 3082 /* try again */
a7cb1f99 3083 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3084 (int)PERL_REVISION, (int)PERL_VERSION,
3085 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3086#endif
cea2e8a9 3087 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 3088 }
3089
b28d0864 3090 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3091#ifdef HAS_SETEGID
b28d0864 3092 (void)setegid(PL_statbuf.st_gid);
a687059c 3093#else
fe14fcc3 3094#ifdef HAS_SETREGID
b28d0864 3095 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW		 3096#else
3097#ifdef HAS_SETRESGID
b28d0864 3098 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3099#else
b28d0864 3100 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW		 3101#endif
3102#endif
85e6fe83 3103#endif
b28d0864 3104 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3105 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3106 }
b28d0864
NIS		 3107 if (PL_statbuf.st_mode & S_ISUID) {
3108 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3109#ifdef HAS_SETEUID
b28d0864 3110 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3111#else
fe14fcc3 3112#ifdef HAS_SETREUID
b28d0864 3113 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW		 3114#else
3115#ifdef HAS_SETRESUID
b28d0864 3116 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3117#else
b28d0864 3118 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW		 3119#endif
3120#endif
85e6fe83 3121#endif
b28d0864 3122 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3123 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3124 }
b28d0864 3125 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3126#ifdef HAS_SETEUID
b28d0864 3127 (void)seteuid((Uid_t)PL_uid);
a687059c 3128#else
fe14fcc3 3129#ifdef HAS_SETREUID
b28d0864 3130 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3131#else
85e6fe83 3132#ifdef HAS_SETRESUID
b28d0864 3133 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3134#else
b28d0864 3135 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3136#endif
a687059c
LW		 3137#endif
3138#endif
b28d0864 3139 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3140 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3141 }
748a9306 3142 init_ids();
b28d0864 3143 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3144 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW		 3145 }
3146#ifdef IAMSUID
6b88bc9c 3147 else if (PL_preprocess)
cea2e8a9 3148 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3149 else if (fdscript >= 0)
cea2e8a9 3150 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3151 else
cea2e8a9 3152 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb 3153
3154 /* We absolutely must clear out any saved ids here, so we */
3155 /* exec the real perl, substituting fd script for scriptname. */
3156 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS		 3157 PerlIO_rewind(PL_rsfp);
3158 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS		 3159 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3160 if (!PL_origargv[which])
cea2e8a9
GS		 3161 Perl_croak(aTHX_ "Permission denied");
3162 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3163 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3164#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3165 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3166#endif
a7cb1f99 3167 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3168 (int)PERL_REVISION, (int)PERL_VERSION,
3169 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3170 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3171#endif /* IAMSUID */
a687059c 3172#else /* !DOSUID */
3280af22 3173 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3174#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS		 3175 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3176 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3177 ||
b28d0864 3178 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3179 )
b28d0864 3180 if (!PL_do_undump)
cea2e8a9 3181 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3182FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3183#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3184 /* not set-id, must be wrapped */
a687059c 3185 }
13281fa4 3186#endif /* DOSUID */
79072805 3187}
13281fa4 3188
76e3520e 3189STATIC void
cea2e8a9 3190S_find_beginning(pTHX)
79072805 3191{
6e72f9df 3192 register char *s, *s2;
33b78306
LW		 3193
3194 /* skip forward in input to the real script? */
3195
bbce6d69 3196 forbid_setid("-x");
bf4acbe4 3197#ifdef MACOS_TRADITIONAL
084592ab 3198 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3199
bf4acbe4
GS		 3200 while (PL_doextract || gMacPerl_AlwaysExtract) {
3201 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3202 if (!gMacPerl_AlwaysExtract)
3203 Perl_croak(aTHX_ "No Perl script found in input\n");
3204
3205 if (PL_doextract) /* require explicit override ? */
3206 if (!OverrideExtract(PL_origfilename))
3207 Perl_croak(aTHX_ "User aborted script\n");
3208 else
3209 PL_doextract = FALSE;
3210
3211 /* Pater peccavi, file does not have #! */
3212 PerlIO_rewind(PL_rsfp);
ac27b0f5 3213
bf4acbe4
GS		 3214 break;
3215 }
3216#else
3280af22
NIS		 3217 while (PL_doextract) {
3218 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3219 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3220#endif
4f0c37ba
IZ		 3221 s2 = s;
3222 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS		 3223 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3224 PL_doextract = FALSE;
6e72f9df 3225 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3226 s2 = s;
3227 while (*s == ' ' || *s == '\t') s++;
3228 if (*s++ == '-') {
3229 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3230 if (strnEQ(s2-4,"perl",4))
3231 /*SUPPRESS 530*/
155aba94
GS		 3232 while ((s = moreswitches(s)))
3233 ;
33b78306 3234 }
95e8664e
CN		 3235#ifdef MACOS_TRADITIONAL
3236 break;
3237#endif
83025b21
LW		 3238 }
3239 }
3240}
3241
afe37c7d 3242
76e3520e 3243STATIC void
cea2e8a9 3244S_init_ids(pTHX)
352d5a3a 3245{
d8eceb89
JH		 3246 PL_uid = PerlProc_getuid();
3247 PL_euid = PerlProc_geteuid();
3248 PL_gid = PerlProc_getgid();
3249 PL_egid = PerlProc_getegid();
748a9306 3250#ifdef VMS
b28d0864
NIS		 3251 PL_uid |= PL_gid << 16;
3252 PL_euid |= PL_egid << 16;
748a9306 3253#endif
3280af22 3254 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3255}
79072805 3256
76e3520e 3257STATIC void
cea2e8a9 3258S_forbid_setid(pTHX_ char *s)
bbce6d69 3259{
3280af22 3260 if (PL_euid != PL_uid)
cea2e8a9 3261 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3262 if (PL_egid != PL_gid)
cea2e8a9 3263 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69 3264}
3265
1ee4443e
IZ		 3266void
3267Perl_init_debugger(pTHX)
748a9306 3268{
1ee4443e
IZ		 3269 HV *ostash = PL_curstash;
3270
3280af22
NIS		 3271 PL_curstash = PL_debstash;
3272 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3273 AvREAL_off(PL_dbargs);
3274 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3275 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3276 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3277 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3278 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3279 sv_setiv(PL_DBsingle, 0);
3280af22 3280 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3281 sv_setiv(PL_DBtrace, 0);
3280af22 3282 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3283 sv_setiv(PL_DBsignal, 0);
1ee4443e 3284 PL_curstash = ostash;
352d5a3a
LW		 3285}
3286
2ce36478
SM		 3287#ifndef STRESS_REALLOC
3288#define REASONABLE(size) (size)
3289#else
3290#define REASONABLE(size) (1) /* unreasonable */
3291#endif
3292
11343788 3293void
cea2e8a9 3294Perl_init_stacks(pTHX)
79072805 3295{
e336de0d 3296 /* start with 128-item stack and 8K cxstack */
3280af22 3297 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3298 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS		 3299 PL_curstackinfo->si_type = PERLSI_MAIN;
3300 PL_curstack = PL_curstackinfo->si_stack;
3301 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3302
3280af22
NIS		 3303 PL_stack_base = AvARRAY(PL_curstack);
3304 PL_stack_sp = PL_stack_base;
3305 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3306
3280af22
NIS		 3307 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3308 PL_tmps_floor = -1;
3309 PL_tmps_ix = -1;
3310 PL_tmps_max = REASONABLE(128);
8990e307 3311
3280af22
NIS		 3312 New(54,PL_markstack,REASONABLE(32),I32);
3313 PL_markstack_ptr = PL_markstack;
3314 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3315
ce2f7c3b 3316 SET_MARK_OFFSET;
e336de0d 3317
3280af22
NIS		 3318 New(54,PL_scopestack,REASONABLE(32),I32);
3319 PL_scopestack_ix = 0;
3320 PL_scopestack_max = REASONABLE(32);
79072805 3321
3280af22
NIS		 3322 New(54,PL_savestack,REASONABLE(128),ANY);
3323 PL_savestack_ix = 0;
3324 PL_savestack_max = REASONABLE(128);
79072805 3325
3280af22
NIS		 3326 New(54,PL_retstack,REASONABLE(16),OP*);
3327 PL_retstack_ix = 0;
3328 PL_retstack_max = REASONABLE(16);
378cc40b 3329}
33b78306 3330
2ce36478
SM		 3331#undef REASONABLE
3332
76e3520e 3333STATIC void
cea2e8a9 3334S_nuke_stacks(pTHX)
6e72f9df 3335{
3280af22
NIS		 3336 while (PL_curstackinfo->si_next)
3337 PL_curstackinfo = PL_curstackinfo->si_next;
3338 while (PL_curstackinfo) {
3339 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3340 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS		 3341 Safefree(PL_curstackinfo->si_cxstack);
3342 Safefree(PL_curstackinfo);
3343 PL_curstackinfo = p;
e336de0d 3344 }
3280af22
NIS		 3345 Safefree(PL_tmps_stack);
3346 Safefree(PL_markstack);
3347 Safefree(PL_scopestack);
3348 Safefree(PL_savestack);
3349 Safefree(PL_retstack);
378cc40b 3350}
33b78306 3351
76e3520e 3352STATIC void
cea2e8a9 3353S_init_lexer(pTHX)
8990e307 3354{
06039172 3355 PerlIO *tmpfp;
3280af22
NIS		 3356 tmpfp = PL_rsfp;
3357 PL_rsfp = Nullfp;
3358 lex_start(PL_linestr);
3359 PL_rsfp = tmpfp;
79cb57f6 3360 PL_subname = newSVpvn("main",4);
8990e307
LW		 3361}
3362
76e3520e 3363STATIC void
cea2e8a9 3364S_init_predump_symbols(pTHX)
45d8adaa 3365{
93a17b20 3366 GV *tmpgv;
af8c498a 3367 IO *io;
79072805 3368
864dbfa3 3369 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS		 3370 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3371 GvMULTI_on(PL_stdingv);
af8c498a 3372 io = GvIOp(PL_stdingv);
a04651f4 3373 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3374 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3375 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3376 GvMULTI_on(tmpgv);
af8c498a 3377 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3378
85e6fe83 3379 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3380 GvMULTI_on(tmpgv);
af8c498a 3381 io = GvIOp(tmpgv);
a04651f4 3382 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3383 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3384 setdefout(tmpgv);
adbc6bb1 3385 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3386 GvMULTI_on(tmpgv);
af8c498a 3387 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3388
bf49b057
GS		 3389 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3390 GvMULTI_on(PL_stderrgv);
3391 io = GvIOp(PL_stderrgv);
a04651f4 3392 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3393 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3394 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3395 GvMULTI_on(tmpgv);
af8c498a 3396 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3397
3280af22 3398 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3399
bf4acbe4
GS		 3400 if (PL_osname)
3401 Safefree(PL_osname);
3402 PL_osname = savepv(OSNAME);
79072805 3403}
33b78306 3404
a11ec5a9
RGS		 3405void
3406Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
33b78306 3407{
79072805 3408 char *s;
79072805 3409 argc--,argv++; /* skip name of script */
3280af22 3410 if (PL_doswitches) {
79072805
LW		 3411 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3412 if (!argv[0][1])
3413 break;
379d538a 3414 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW		 3415 argc--,argv++;
3416 break;
3417 }
155aba94 3418 if ((s = strchr(argv[0], '='))) {
79072805 3419 *s++ = '\0';
85e6fe83 3420 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW		 3421 }
3422 else
85e6fe83 3423 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3424 }
79072805 3425 }
a11ec5a9
RGS		 3426 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3427 GvMULTI_on(PL_argvgv);
3428 (void)gv_AVadd(PL_argvgv);
3429 av_clear(GvAVn(PL_argvgv));
3430 for (; argc > 0; argc--,argv++) {
3431 SV *sv = newSVpv(argv[0],0);
3432 av_push(GvAVn(PL_argvgv),sv);
3433 if (PL_widesyscalls)
3434 (void)sv_utf8_decode(sv);
3435 }
3436 }
3437}
3438
04fee9b5
NIS		 3439#ifdef HAS_PROCSELFEXE
3440/* This is a function so that we don't hold on to MAXPATHLEN
8338e367 3441 bytes of stack longer than necessary
04fee9b5
NIS		 3442 */
3443STATIC void
3444S_procself_val(pTHX_ SV *sv, char *arg0)
3445{
3446 char buf[MAXPATHLEN];
d13a6521 3447 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
04fee9b5
NIS		 3448 if (len > 0) {
3449 sv_setpvn(sv,buf,len);
3450 }
3451 else {
3452 sv_setpv(sv,arg0);
3453 }
3454}
3455#endif /* HAS_PROCSELFEXE */
3456
a11ec5a9
RGS		 3457STATIC void
3458S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3459{
3460 char *s;
3461 SV *sv;
3462 GV* tmpgv;
a11ec5a9 3463
3280af22
NIS		 3464 PL_toptarget = NEWSV(0,0);
3465 sv_upgrade(PL_toptarget, SVt_PVFM);
3466 sv_setpvn(PL_toptarget, "", 0);
3467 PL_bodytarget = NEWSV(0,0);
3468 sv_upgrade(PL_bodytarget, SVt_PVFM);
3469 sv_setpvn(PL_bodytarget, "", 0);
3470 PL_formtarget = PL_bodytarget;
79072805 3471
bbce6d69 3472 TAINT;
a11ec5a9
RGS		 3473
3474 init_argv_symbols(argc,argv);
3475
155aba94 3476 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS		 3477#ifdef MACOS_TRADITIONAL
3478 /* $0 is not majick on a Mac */
3479 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3480#else
3280af22 3481 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3482 magicname("0", "0", 1);
bf4acbe4 3483#endif
79072805 3484 }
04fee9b5
NIS		 3485 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))) {/* $^X */
3486#ifdef HAS_PROCSELFEXE
3487 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
3488#else
8338e367 3489#ifdef OS2
23da6c43 3490 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));