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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
6224f72b 1102 case 'T':
3280af22 1103 PL_tainting = TRUE;
6224f72b
GS		 1104 s++;
1105 goto reswitch;
f86702cc 1106
6224f72b 1107 case 'e':
bf4acbe4
GS		 1108#ifdef MACOS_TRADITIONAL
1109 /* ignore -e for Dev:Pseudo argument */
1110 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1111 break;
bf4acbe4 1112#endif
3280af22 1113 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1114 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1115 if (!PL_e_script) {
79cb57f6 1116 PL_e_script = newSVpvn("",0);
0cb96387 1117 filter_add(read_e_script, NULL);
6224f72b
GS		 1118 }
1119 if (*++s)
3280af22 1120 sv_catpv(PL_e_script, s);
6224f72b 1121 else if (argv[1]) {
3280af22 1122 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS		 1123 argc--,argv++;
1124 }
1125 else
cea2e8a9 1126 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1127 sv_catpv(PL_e_script, "\n");
6224f72b 1128 break;
afe37c7d 1129
6224f72b
GS		 1130 case 'I': /* -I handled both here and in moreswitches() */
1131 forbid_setid("-I");
1132 if (!*++s && (s=argv[1]) != Nullch) {
1133 argc--,argv++;
1134 }
6224f72b 1135 if (s && *s) {
0df16ed7
GS		 1136 char *p;
1137 STRLEN len = strlen(s);
1138 p = savepvn(s, len);
9c8a64f0 1139 incpush(p, TRUE, TRUE);
0df16ed7
GS		 1140 sv_catpvn(sv, "-I", 2);
1141 sv_catpvn(sv, p, len);
1142 sv_catpvn(sv, " ", 1);
6224f72b 1143 Safefree(p);
0df16ed7
GS		 1144 }
1145 else
a67e862a 1146 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS		 1147 break;
1148 case 'P':
1149 forbid_setid("-P");
3280af22 1150 PL_preprocess = TRUE;
6224f72b
GS		 1151 s++;
1152 goto reswitch;
1153 case 'S':
1154 forbid_setid("-S");
1155 dosearch = TRUE;
1156 s++;
1157 goto reswitch;
1158 case 'V':
3280af22
NIS		 1159 if (!PL_preambleav)
1160 PL_preambleav = newAV();
1161 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1162 if (*++s != ':') {
3280af22 1163 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1164#ifdef VMS
6b88bc9c 1165 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1166#else
3280af22 1167 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1168#endif
3280af22 1169 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1170# ifdef DEBUGGING
3280af22 1171 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1172# endif
6224f72b 1173# ifdef MULTIPLICITY
8f872242 1174 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1175# endif
4d1ff10f
AB		 1176# ifdef USE_5005THREADS
1177 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1178# endif
ac5e8965
JH		 1179# ifdef USE_ITHREADS
1180 sv_catpv(PL_Sv," USE_ITHREADS");
1181# endif
10cc9d2a
JH		 1182# ifdef USE_64_BIT_INT
1183 sv_catpv(PL_Sv," USE_64_BIT_INT");
1184# endif
1185# ifdef USE_64_BIT_ALL
1186 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH		 1187# endif
1188# ifdef USE_LONG_DOUBLE
1189 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1190# endif
53430762
JH		 1191# ifdef USE_LARGE_FILES
1192 sv_catpv(PL_Sv," USE_LARGE_FILES");
1193# endif
ac5e8965
JH		 1194# ifdef USE_SOCKS
1195 sv_catpv(PL_Sv," USE_SOCKS");
1196# endif
b363f7ed
GS		 1197# ifdef PERL_IMPLICIT_CONTEXT
1198 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1199# endif
1200# ifdef PERL_IMPLICIT_SYS
1201 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1202# endif
3280af22 1203 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1204
6224f72b
GS		 1205#if defined(LOCAL_PATCH_COUNT)
1206 if (LOCAL_PATCH_COUNT > 0) {
1207 int i;
3280af22 1208 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1209 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1210 if (PL_localpatches[i])
cea2e8a9 1211 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS		 1212 }
1213 }
1214#endif
cea2e8a9 1215 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS		 1216#ifdef __DATE__
1217# ifdef __TIME__
cea2e8a9 1218 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1219# else
cea2e8a9 1220 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS		 1221# endif
1222#endif
3280af22 1223 sv_catpv(PL_Sv, "; \
6224f72b 1224$\"=\"\\n \"; \
69fcd688
JH		 1225@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1226#ifdef __CYGWIN__
1227 sv_catpv(PL_Sv,"\
1228push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1229#endif
1230 sv_catpv(PL_Sv, "\
6224f72b
GS		 1231print \" \\%ENV:\\n @env\\n\" if @env; \
1232print \" \\@INC:\\n @INC\\n\";");
1233 }
1234 else {
3280af22
NIS		 1235 PL_Sv = newSVpv("config_vars(qw(",0);
1236 sv_catpv(PL_Sv, ++s);
1237 sv_catpv(PL_Sv, "))");
6224f72b
GS		 1238 s += strlen(s);
1239 }
3280af22 1240 av_push(PL_preambleav, PL_Sv);
6224f72b
GS		 1241 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1242 goto reswitch;
1243 case 'x':
3280af22 1244 PL_doextract = TRUE;
6224f72b
GS		 1245 s++;
1246 if (*s)
f4c556ac 1247 cddir = s;
6224f72b
GS		 1248 break;
1249 case 0:
1250 break;
1251 case '-':
1252 if (!*++s || isSPACE(*s)) {
1253 argc--,argv++;
1254 goto switch_end;
1255 }
1256 /* catch use of gnu style long options */
1257 if (strEQ(s, "version")) {
1258 s = "v";
1259 goto reswitch;
1260 }
1261 if (strEQ(s, "help")) {
1262 s = "h";
1263 goto reswitch;
1264 }
1265 s--;
1266 /* FALL THROUGH */
1267 default:
cea2e8a9 1268 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW		 1269 }
1270 }
6224f72b 1271 switch_end:
54310121 1272
f675dbe5
CB		 1273 if (
1274#ifndef SECURE_INTERNAL_GETENV
1275 !PL_tainting &&
1276#endif
cf756827 1277 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1278 {
cf756827 1279 char *popt = s;
74288ac8
GS		 1280 while (isSPACE(*s))
1281 s++;
1282 if (*s == '-' && *(s+1) == 'T')
1283 PL_tainting = TRUE;
1284 else {
cf756827 1285 char *popt_copy = Nullch;
74288ac8 1286 while (s && *s) {
4ea8f8fb 1287 char *d;
74288ac8
GS		 1288 while (isSPACE(*s))
1289 s++;
1290 if (*s == '-') {
1291 s++;
1292 if (isSPACE(*s))
1293 continue;
1294 }
4ea8f8fb 1295 d = s;
74288ac8
GS		 1296 if (!*s)
1297 break;
1298 if (!strchr("DIMUdmw", *s))
cea2e8a9 1299 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS		 1300 while (++s && *s) {
1301 if (isSPACE(*s)) {
cf756827
GS		 1302 if (!popt_copy) {
1303 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1304 s = popt_copy + (s - popt);
1305 d = popt_copy + (d - popt);
1306 }
4ea8f8fb
MS		 1307 *s++ = '\0';
1308 break;
1309 }
1310 }
1311 moreswitches(d);
6224f72b 1312 }
6224f72b
GS		 1313 }
1314 }
a0d0e21e 1315
6224f72b
GS		 1316 if (!scriptname)
1317 scriptname = argv[0];
3280af22 1318 if (PL_e_script) {
6224f72b
GS		 1319 argc++,argv--;
1320 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1321 }
1322 else if (scriptname == Nullch) {
1323#ifdef MSDOS
1324 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1325 moreswitches("h");
1326#endif
1327 scriptname = "-";
1328 }
1329
1330 init_perllib();
1331
1332 open_script(scriptname,dosearch,sv,&fdscript);
1333
1334 validate_suid(validarg, scriptname,fdscript);
1335
64ca3a65 1336#ifndef PERL_MICRO
0b5b802d
GS		 1337#if defined(SIGCHLD) || defined(SIGCLD)
1338 {
1339#ifndef SIGCHLD
1340# define SIGCHLD SIGCLD
1341#endif
1342 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1343 if (sigstate == SIG_IGN) {
1344 if (ckWARN(WARN_SIGNAL))
1345 Perl_warner(aTHX_ WARN_SIGNAL,
1346 "Can't ignore signal CHLD, forcing to default");
1347 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1348 }
1349 }
1350#endif
64ca3a65 1351#endif
0b5b802d 1352
bf4acbe4
GS		 1353#ifdef MACOS_TRADITIONAL
1354 if (PL_doextract || gMacPerl_AlwaysExtract) {
1355#else
f4c556ac 1356 if (PL_doextract) {
bf4acbe4 1357#endif
6224f72b 1358 find_beginning();
f4c556ac
GS		 1359 if (cddir && PerlDir_chdir(cddir) < 0)
1360 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1361
1362 }
6224f72b 1363
3280af22
NIS		 1364 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1365 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1366 CvUNIQUE_on(PL_compcv);
1367
1368 PL_comppad = newAV();
1369 av_push(PL_comppad, Nullsv);
1370 PL_curpad = AvARRAY(PL_comppad);
1371 PL_comppad_name = newAV();
1372 PL_comppad_name_fill = 0;
1373 PL_min_intro_pending = 0;
1374 PL_padix = 0;
4d1ff10f 1375#ifdef USE_5005THREADS
79cb57f6 1376 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS		 1377 PL_curpad[0] = (SV*)newAV();
1378 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1379 CvOWNER(PL_compcv) = 0;
1380 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1381 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1382#endif /* USE_5005THREADS */
6224f72b
GS		 1383
1384 comppadlist = newAV();
1385 AvREAL_off(comppadlist);
3280af22
NIS		 1386 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1387 av_store(comppadlist, 1, (SV*)PL_comppad);
1388 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1389
0c4f7ff0 1390 boot_core_PerlIO();
6224f72b 1391 boot_core_UNIVERSAL();
9a34ef1d 1392#ifndef PERL_MICRO
09bef843 1393 boot_core_xsutils();
9a34ef1d 1394#endif
6224f72b
GS		 1395
1396 if (xsinit)
acfe0abc 1397 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1398#ifndef PERL_MICRO
ed79a026 1399#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1400 init_os_extras();
6224f72b 1401#endif
64ca3a65 1402#endif
6224f72b 1403
29209bc5 1404#ifdef USE_SOCKS
1b9c9cf5
DH		 1405# ifdef HAS_SOCKS5_INIT
1406 socks5_init(argv[0]);
1407# else
29209bc5 1408 SOCKSinit(argv[0]);
1b9c9cf5 1409# endif
ac27b0f5 1410#endif
29209bc5 1411
6224f72b
GS		 1412 init_predump_symbols();
1413 /* init_postdump_symbols not currently designed to be called */
1414 /* more than once (ENV isn't cleared first, for example) */
1415 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1416 if (!PL_do_undump)
6224f72b
GS		 1417 init_postdump_symbols(argc,argv,env);
1418
1419 init_lexer();
1420
1421 /* now parse the script */
1422
91487cfc 1423 SETERRNO(0,SS$_NORMAL);
3280af22 1424 PL_error_count = 0;
bf4acbe4
GS		 1425#ifdef MACOS_TRADITIONAL
1426 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1427 if (PL_minus_c)
1428 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1429 else {
1430 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1431 MacPerl_MPWFileName(PL_origfilename));
1432 }
1433 }
1434#else
3280af22
NIS		 1435 if (yyparse() || PL_error_count) {
1436 if (PL_minus_c)
cea2e8a9 1437 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1438 else {
cea2e8a9 1439 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1440 PL_origfilename);
6224f72b
GS		 1441 }
1442 }
bf4acbe4 1443#endif
57843af0 1444 CopLINE_set(PL_curcop, 0);
3280af22
NIS		 1445 PL_curstash = PL_defstash;
1446 PL_preprocess = FALSE;
1447 if (PL_e_script) {
1448 SvREFCNT_dec(PL_e_script);
1449 PL_e_script = Nullsv;
6224f72b
GS		 1450 }
1451
8bfdd7d9
HS		 1452/*
1453 Not sure that this is still the right place to do this now that we
1454 no longer use PL_nrs. HVDS 2001/09/09
1455*/
864dbfa3 1456 sv_setsv(get_sv("/", TRUE), PL_rs);
8bfdd7d9 1457
3280af22 1458 if (PL_do_undump)
6224f72b
GS		 1459 my_unexec();
1460
57843af0
GS		 1461 if (isWARN_ONCE) {
1462 SAVECOPFILE(PL_curcop);
1463 SAVECOPLINE(PL_curcop);
3280af22 1464 gv_check(PL_defstash);
57843af0 1465 }
6224f72b
GS		 1466
1467 LEAVE;
1468 FREETMPS;
1469
1470#ifdef MYMALLOC
1471 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1472 dump_mstats("after compilation:");
1473#endif
1474
1475 ENTER;
3280af22 1476 PL_restartop = 0;
312caa8e 1477 return NULL;
6224f72b
GS		 1478}
1479
954c1994
GS		 1480/*
1481=for apidoc perl_run
1482
1483Tells a Perl interpreter to run. See L<perlembed>.
1484
1485=cut
1486*/
1487
6224f72b 1488int
0cb96387 1489perl_run(pTHXx)
6224f72b 1490{
6224f72b 1491 I32 oldscope;
14dd3ad8 1492 int ret = 0;
db36c5a1 1493 dJMPENV;
4d1ff10f 1494#ifdef USE_5005THREADS
cea2e8a9
GS		 1495 dTHX;
1496#endif
6224f72b 1497
3280af22 1498 oldscope = PL_scopestack_ix;
96e176bf
CL		 1499#ifdef VMS
1500 VMSISH_HUSHED = 0;
1501#endif
6224f72b 1502
14dd3ad8 1503#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1504 redo_body:
14dd3ad8
GS		 1505 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1506#else
1507 JMPENV_PUSH(ret);
1508#endif
6224f72b
GS		 1509 switch (ret) {
1510 case 1:
1511 cxstack_ix = -1; /* start context stack again */
312caa8e 1512 goto redo_body;
14dd3ad8
GS		 1513 case 0: /* normal completion */
1514#ifndef PERL_FLEXIBLE_EXCEPTIONS
1515 redo_body:
1516 run_body(oldscope);
1517#endif
1518 /* FALL THROUGH */
1519 case 2: /* my_exit() */
3280af22 1520 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1521 LEAVE;
1522 FREETMPS;
3280af22 1523 PL_curstash = PL_defstash;
3a1ee7e8 1524 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB		 1525 PL_endav && !PL_minus_c)
1526 call_list(oldscope, PL_endav);
6224f72b
GS		 1527#ifdef MYMALLOC
1528 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1529 dump_mstats("after execution: ");
1530#endif
14dd3ad8
GS		 1531 ret = STATUS_NATIVE_EXPORT;
1532 break;
6224f72b 1533 case 3:
312caa8e
CS		 1534 if (PL_restartop) {
1535 POPSTACK_TO(PL_mainstack);
1536 goto redo_body;
6224f72b 1537 }
bf49b057 1538 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1539 FREETMPS;
14dd3ad8
GS		 1540 ret = 1;
1541 break;
6224f72b
GS		 1542 }
1543
14dd3ad8
GS		 1544 JMPENV_POP;
1545 return ret;
312caa8e
CS		 1546}
1547
14dd3ad8 1548#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1549STATIC void *
14dd3ad8 1550S_vrun_body(pTHX_ va_list args)
312caa8e 1551{
312caa8e
CS		 1552 I32 oldscope = va_arg(args, I32);
1553
14dd3ad8
GS		 1554 return run_body(oldscope);
1555}
1556#endif
1557
1558
1559STATIC void *
1560S_run_body(pTHX_ I32 oldscope)
1561{
6224f72b 1562 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1563 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1564
3280af22 1565 if (!PL_restartop) {
6224f72b
GS		 1566 DEBUG_x(dump_all());
1567 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH		 1568 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1569 PTR2UV(thr)));
6224f72b 1570
3280af22 1571 if (PL_minus_c) {
bf4acbe4 1572#ifdef MACOS_TRADITIONAL
be708cc0 1573 PerlIO_printf(Perl_error_log, "# %s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1574#else
bf49b057 1575 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1576#endif
6224f72b
GS		 1577 my_exit(0);
1578 }
3280af22 1579 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1580 sv_setiv(PL_DBsingle, 1);
3280af22
NIS		 1581 if (PL_initav)
1582 call_list(oldscope, PL_initav);
6224f72b
GS		 1583 }
1584
1585 /* do it */
1586
3280af22 1587 if (PL_restartop) {
533c011a 1588 PL_op = PL_restartop;
3280af22 1589 PL_restartop = 0;
cea2e8a9 1590 CALLRUNOPS(aTHX);
6224f72b 1591 }
3280af22
NIS		 1592 else if (PL_main_start) {
1593 CvDEPTH(PL_main_cv) = 1;
533c011a 1594 PL_op = PL_main_start;
cea2e8a9 1595 CALLRUNOPS(aTHX);
6224f72b
GS		 1596 }
1597
f6b3007c
JH		 1598 my_exit(0);
1599 /* NOTREACHED */
312caa8e 1600 return NULL;
6224f72b
GS		 1601}
1602
954c1994
GS		 1603/*
1604=for apidoc p||get_sv
1605
1606Returns the SV of the specified Perl scalar. If C<create> is set and the
1607Perl variable does not exist then it will be created. If C<create> is not
1608set and the variable does not exist then NULL is returned.
1609
1610=cut
1611*/
1612
6224f72b 1613SV*
864dbfa3 1614Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS		 1615{
1616 GV *gv;
4d1ff10f 1617#ifdef USE_5005THREADS
6224f72b
GS		 1618 if (name[1] == '\0' && !isALPHA(name[0])) {
1619 PADOFFSET tmp = find_threadsv(name);
411caa50 1620 if (tmp != NOT_IN_PAD)
6224f72b 1621 return THREADSV(tmp);
6224f72b 1622 }
4d1ff10f 1623#endif /* USE_5005THREADS */
6224f72b
GS		 1624 gv = gv_fetchpv(name, create, SVt_PV);
1625 if (gv)
1626 return GvSV(gv);
1627 return Nullsv;
1628}
1629
954c1994
GS		 1630/*
1631=for apidoc p||get_av
1632
1633Returns the AV of the specified Perl array. If C<create> is set and the
1634Perl variable does not exist then it will be created. If C<create> is not
1635set and the variable does not exist then NULL is returned.
1636
1637=cut
1638*/
1639
6224f72b 1640AV*
864dbfa3 1641Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS		 1642{
1643 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1644 if (create)
1645 return GvAVn(gv);
1646 if (gv)
1647 return GvAV(gv);
1648 return Nullav;
1649}
1650
954c1994
GS		 1651/*
1652=for apidoc p||get_hv
1653
1654Returns the HV of the specified Perl hash. 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 1661HV*
864dbfa3 1662Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1663{
a0d0e21e
LW		 1664 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1665 if (create)
1666 return GvHVn(gv);
1667 if (gv)
1668 return GvHV(gv);
1669 return Nullhv;
1670}
1671
954c1994
GS		 1672/*
1673=for apidoc p||get_cv
1674
1675Returns the CV of the specified Perl subroutine. If C<create> is set and
1676the Perl subroutine does not exist then it will be declared (which has the
1677same effect as saying C<sub name;>). If C<create> is not set and the
1678subroutine does not exist then NULL is returned.
1679
1680=cut
1681*/
1682
a0d0e21e 1683CV*
864dbfa3 1684Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW		 1685{
1686 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1687 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS		 1688 /* XXX this is probably not what they think they're getting.
1689 * It has the same effect as "sub name;", i.e. just a forward
1690 * declaration! */
8ebc5c01 1691 if (create && !GvCVu(gv))
774d564b 1692 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1693 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1694 Nullop,
a0d0e21e
LW		 1695 Nullop);
1696 if (gv)
8ebc5c01 1697 return GvCVu(gv);
a0d0e21e
LW		 1698 return Nullcv;
1699}
1700
79072805
LW		 1701/* Be sure to refetch the stack pointer after calling these routines. */
1702
954c1994
GS		 1703/*
1704=for apidoc p||call_argv
1705
1706Performs a callback to the specified Perl sub. See L<perlcall>.
1707
1708=cut
1709*/
1710
a0d0e21e 1711I32
864dbfa3 1712Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1713
8ac85365
NIS		 1714 /* See G_* flags in cop.h */
1715 /* null terminated arg list */
8990e307 1716{
a0d0e21e 1717 dSP;
8990e307 1718
924508f0 1719 PUSHMARK(SP);
a0d0e21e 1720 if (argv) {
8990e307 1721 while (*argv) {
a0d0e21e 1722 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW		 1723 argv++;
1724 }
a0d0e21e 1725 PUTBACK;
8990e307 1726 }
864dbfa3 1727 return call_pv(sub_name, flags);
8990e307
LW		 1728}
1729
954c1994
GS		 1730/*
1731=for apidoc p||call_pv
1732
1733Performs a callback to the specified Perl sub. See L<perlcall>.
1734
1735=cut
1736*/
1737
a0d0e21e 1738I32
864dbfa3 1739Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS		 1740 /* name of the subroutine */
1741 /* See G_* flags in cop.h */
a0d0e21e 1742{
864dbfa3 1743 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW		 1744}
1745
954c1994
GS		 1746/*
1747=for apidoc p||call_method
1748
1749Performs a callback to the specified Perl method. The blessed object must
1750be on the stack. See L<perlcall>.
1751
1752=cut
1753*/
1754
a0d0e21e 1755I32
864dbfa3 1756Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS		 1757 /* name of the subroutine */
1758 /* See G_* flags in cop.h */
a0d0e21e 1759{
968b3946 1760 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW		 1761}
1762
1763/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS		 1764/*
1765=for apidoc p||call_sv
1766
1767Performs a callback to the Perl sub whose name is in the SV. See
1768L<perlcall>.
1769
1770=cut
1771*/
1772
a0d0e21e 1773I32
864dbfa3 1774Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1775 /* See G_* flags in cop.h */
a0d0e21e 1776{
924508f0 1777 dSP;
a0d0e21e 1778 LOGOP myop; /* fake syntax tree node */
968b3946 1779 UNOP method_op;
aa689395 1780 I32 oldmark;
13689cfe 1781 volatile I32 retval = 0;
a0d0e21e 1782 I32 oldscope;
54310121 1783 bool oldcatch = CATCH_GET;
6224f72b 1784 int ret;
533c011a 1785 OP* oldop = PL_op;
db36c5a1 1786 dJMPENV;
1e422769 1787
a0d0e21e
LW		 1788 if (flags & G_DISCARD) {
1789 ENTER;
1790 SAVETMPS;
1791 }
1792
aa689395 1793 Zero(&myop, 1, LOGOP);
54310121 1794 myop.op_next = Nullop;
f51d4af5 1795 if (!(flags & G_NOARGS))
aa689395 1796 myop.op_flags |= OPf_STACKED;
54310121 1797 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1798 (flags & G_ARRAY) ? OPf_WANT_LIST :
1799 OPf_WANT_SCALAR);
462e5cf6 1800 SAVEOP();
533c011a 1801 PL_op = (OP*)&myop;
aa689395 1802
3280af22
NIS		 1803 EXTEND(PL_stack_sp, 1);
1804 *++PL_stack_sp = sv;
aa689395 1805 oldmark = TOPMARK;
3280af22 1806 oldscope = PL_scopestack_ix;
a0d0e21e 1807
3280af22 1808 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1809 /* Handle first BEGIN of -d. */
3280af22 1810 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24 1811 /* Try harder, since this may have been a sighandler, thus
1812 * curstash may be meaningless. */
3280af22 1813 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1814 && !(flags & G_NODEBUG))
533c011a 1815 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1816
968b3946
GS		 1817 if (flags & G_METHOD) {
1818 Zero(&method_op, 1, UNOP);
1819 method_op.op_next = PL_op;
1820 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1821 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1822 PL_op = (OP*)&method_op;
968b3946
GS		 1823 }
1824
312caa8e 1825 if (!(flags & G_EVAL)) {
0cdb2077 1826 CATCH_SET(TRUE);
14dd3ad8 1827 call_body((OP*)&myop, FALSE);
312caa8e 1828 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1829 CATCH_SET(oldcatch);
312caa8e
CS		 1830 }
1831 else {
d78bda3d 1832 myop.op_other = (OP*)&myop;
3280af22 1833 PL_markstack_ptr--;
4633a7c4
LW		 1834 /* we're trying to emulate pp_entertry() here */
1835 {
c09156bb 1836 register PERL_CONTEXT *cx;
54310121 1837 I32 gimme = GIMME_V;
ac27b0f5 1838
4633a7c4
LW		 1839 ENTER;
1840 SAVETMPS;
ac27b0f5 1841
968b3946 1842 push_return(Nullop);
1d76a5c3 1843 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1844 PUSHEVAL(cx, 0, 0);
533c011a 1845 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1846
faef0170 1847 PL_in_eval = EVAL_INEVAL;
4633a7c4 1848 if (flags & G_KEEPERR)
faef0170 1849 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1850 else
38a03e6e 1851 sv_setpv(ERRSV,"");
4633a7c4 1852 }
3280af22 1853 PL_markstack_ptr++;
a0d0e21e 1854
14dd3ad8
GS		 1855#ifdef PERL_FLEXIBLE_EXCEPTIONS
1856 redo_body:
1857 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1858 (OP*)&myop, FALSE);
14dd3ad8
GS		 1859#else
1860 JMPENV_PUSH(ret);
1861#endif
6224f72b
GS		 1862 switch (ret) {
1863 case 0:
14dd3ad8
GS		 1864#ifndef PERL_FLEXIBLE_EXCEPTIONS
1865 redo_body:
1866 call_body((OP*)&myop, FALSE);
1867#endif
312caa8e
CS		 1868 retval = PL_stack_sp - (PL_stack_base + oldmark);
1869 if (!(flags & G_KEEPERR))
1870 sv_setpv(ERRSV,"");
a0d0e21e 1871 break;
6224f72b 1872 case 1:
f86702cc 1873 STATUS_ALL_FAILURE;
a0d0e21e 1874 /* FALL THROUGH */
6224f72b 1875 case 2:
a0d0e21e 1876 /* my_exit() was called */
3280af22 1877 PL_curstash = PL_defstash;
a0d0e21e 1878 FREETMPS;
14dd3ad8 1879 JMPENV_POP;
cc3604b1 1880 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1881 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1882 my_exit_jump();
a0d0e21e 1883 /* NOTREACHED */
6224f72b 1884 case 3:
3280af22 1885 if (PL_restartop) {
533c011a 1886 PL_op = PL_restartop;
3280af22 1887 PL_restartop = 0;
312caa8e 1888 goto redo_body;
a0d0e21e 1889 }
3280af22 1890 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1891 if (flags & G_ARRAY)
1892 retval = 0;
1893 else {
1894 retval = 1;
3280af22 1895 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1896 }
312caa8e 1897 break;
a0d0e21e 1898 }
a0d0e21e 1899
3280af22 1900 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW		 1901 SV **newsp;
1902 PMOP *newpm;
1903 I32 gimme;
c09156bb 1904 register PERL_CONTEXT *cx;
a0a2876f
LW		 1905 I32 optype;
1906
1907 POPBLOCK(cx,newpm);
1908 POPEVAL(cx);
1909 pop_return();
3280af22 1910 PL_curpm = newpm;
a0a2876f 1911 LEAVE;
a0d0e21e 1912 }
14dd3ad8 1913 JMPENV_POP;
a0d0e21e 1914 }
1e422769 1915
a0d0e21e 1916 if (flags & G_DISCARD) {
3280af22 1917 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1918 retval = 0;
1919 FREETMPS;
1920 LEAVE;
1921 }
533c011a 1922 PL_op = oldop;
a0d0e21e
LW		 1923 return retval;
1924}
1925
14dd3ad8 1926#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1927STATIC void *
14dd3ad8 1928S_vcall_body(pTHX_ va_list args)
312caa8e
CS		 1929{
1930 OP *myop = va_arg(args, OP*);
1931 int is_eval = va_arg(args, int);
1932
14dd3ad8 1933 call_body(myop, is_eval);
312caa8e
CS		 1934 return NULL;
1935}
14dd3ad8 1936#endif
312caa8e
CS		 1937
1938STATIC void
14dd3ad8 1939S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1940{
312caa8e
CS		 1941 if (PL_op == myop) {
1942 if (is_eval)
f807eda9 1943 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1944 else
f807eda9 1945 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS		 1946 }
1947 if (PL_op)
cea2e8a9 1948 CALLRUNOPS(aTHX);
312caa8e
CS		 1949}
1950
6e72f9df 1951/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1952
954c1994
GS		 1953/*
1954=for apidoc p||eval_sv
1955
1956Tells Perl to C<eval> the string in the SV.
1957
1958=cut
1959*/
1960
a0d0e21e 1961I32
864dbfa3 1962Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1963
8ac85365 1964 /* See G_* flags in cop.h */
a0d0e21e 1965{
924508f0 1966 dSP;
a0d0e21e 1967 UNOP myop; /* fake syntax tree node */
8fa7f367 1968 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1969 volatile I32 retval = 0;
4633a7c4 1970 I32 oldscope;
6224f72b 1971 int ret;
533c011a 1972 OP* oldop = PL_op;
db36c5a1 1973 dJMPENV;
84902520 1974
4633a7c4
LW		 1975 if (flags & G_DISCARD) {
1976 ENTER;
1977 SAVETMPS;
1978 }
1979
462e5cf6 1980 SAVEOP();
533c011a
NIS		 1981 PL_op = (OP*)&myop;
1982 Zero(PL_op, 1, UNOP);
3280af22
NIS		 1983 EXTEND(PL_stack_sp, 1);
1984 *++PL_stack_sp = sv;
1985 oldscope = PL_scopestack_ix;
79072805 1986
4633a7c4
LW		 1987 if (!(flags & G_NOARGS))
1988 myop.op_flags = OPf_STACKED;
79072805 1989 myop.op_next = Nullop;
6e72f9df 1990 myop.op_type = OP_ENTEREVAL;
54310121 1991 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1992 (flags & G_ARRAY) ? OPf_WANT_LIST :
1993 OPf_WANT_SCALAR);
6e72f9df 1994 if (flags & G_KEEPERR)
1995 myop.op_flags |= OPf_SPECIAL;
4633a7c4 1996
14dd3ad8 1997#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1998 redo_body:
14dd3ad8 1999 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2000 (OP*)&myop, TRUE);
14dd3ad8
GS		 2001#else
2002 JMPENV_PUSH(ret);
2003#endif
6224f72b
GS		 2004 switch (ret) {
2005 case 0:
14dd3ad8
GS		 2006#ifndef PERL_FLEXIBLE_EXCEPTIONS
2007 redo_body:
2008 call_body((OP*)&myop,TRUE);
2009#endif
312caa8e
CS		 2010 retval = PL_stack_sp - (PL_stack_base + oldmark);
2011 if (!(flags & G_KEEPERR))
2012 sv_setpv(ERRSV,"");
4633a7c4 2013 break;
6224f72b 2014 case 1:
f86702cc 2015 STATUS_ALL_FAILURE;
4633a7c4 2016 /* FALL THROUGH */
6224f72b 2017 case 2:
4633a7c4 2018 /* my_exit() was called */
3280af22 2019 PL_curstash = PL_defstash;
4633a7c4 2020 FREETMPS;
14dd3ad8 2021 JMPENV_POP;
cc3604b1 2022 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2023 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2024 my_exit_jump();
4633a7c4 2025 /* NOTREACHED */
6224f72b 2026 case 3:
3280af22 2027 if (PL_restartop) {
533c011a 2028 PL_op = PL_restartop;
3280af22 2029 PL_restartop = 0;
312caa8e 2030 goto redo_body;
4633a7c4 2031 }
3280af22 2032 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2033 if (flags & G_ARRAY)
2034 retval = 0;
2035 else {
2036 retval = 1;
3280af22 2037 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2038 }
312caa8e 2039 break;
4633a7c4
LW		 2040 }
2041
14dd3ad8 2042 JMPENV_POP;
4633a7c4 2043 if (flags & G_DISCARD) {
3280af22 2044 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2045 retval = 0;
2046 FREETMPS;
2047 LEAVE;
2048 }
533c011a 2049 PL_op = oldop;
4633a7c4
LW		 2050 return retval;
2051}
2052
954c1994
GS		 2053/*
2054=for apidoc p||eval_pv
2055
2056Tells Perl to C<eval> the given string and return an SV* result.
2057
2058=cut
2059*/
2060
137443ea 2061SV*
864dbfa3 2062Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 2063{
2064 dSP;
2065 SV* sv = newSVpv(p, 0);
2066
864dbfa3 2067 eval_sv(sv, G_SCALAR);
137443ea 2068 SvREFCNT_dec(sv);
2069
2070 SPAGAIN;
2071 sv = POPs;
2072 PUTBACK;
2073
2d8e6c8d
GS		 2074 if (croak_on_error && SvTRUE(ERRSV)) {
2075 STRLEN n_a;
cea2e8a9 2076 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2077 }
137443ea 2078
2079 return sv;
2080}
2081
4633a7c4
LW		 2082/* Require a module. */
2083
954c1994
GS		 2084/*
2085=for apidoc p||require_pv
2086
7d3fb230
BS		 2087Tells Perl to C<require> the file named by the string argument. It is
2088analogous to the Perl code C<eval "require '$file'">. It's even
2089implemented that way; consider using Perl_load_module instead.
954c1994 2090
7d3fb230 2091=cut */
954c1994 2092
4633a7c4 2093void
864dbfa3 2094Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2095{
d3acc0f7
JP		 2096 SV* sv;
2097 dSP;
e788e7d3 2098 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP		 2099 PUTBACK;
2100 sv = sv_newmortal();
4633a7c4
LW		 2101 sv_setpv(sv, "require '");
2102 sv_catpv(sv, pv);
2103 sv_catpv(sv, "'");
864dbfa3 2104 eval_sv(sv, G_DISCARD);
d3acc0f7
JP		 2105 SPAGAIN;
2106 POPSTACK;
79072805
LW		 2107}
2108
79072805 2109void
864dbfa3 2110Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW		 2111{
2112 register GV *gv;
2113
155aba94 2114 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2115 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW		 2116}
2117
76e3520e 2118STATIC void
cea2e8a9 2119S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2120{
ab821d7f 2121 /* This message really ought to be max 23 lines.
75c72d73 2122 * Removed -h because the user already knows that option. Others? */
fb73857a 2123
76e3520e 2124 static char *usage_msg[] = {
fb73857a 2125"-0[octal] specify record separator (\\0, if no argument)",
2126"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2127"-C enable native wide character system interfaces",
1950ee41 2128"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS		 2129"-d[:debugger] run program under debugger",
2130"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2131"-e 'command' one line of program (several -e's allowed, omit programfile)",
2132"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2133"-i[extension] edit <> files in place (makes backup if extension supplied)",
2134"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2135"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS		 2136"-[mM][-]module execute `use/no module...' before executing program",
2137"-n assume 'while (<>) { ... }' loop around program",
2138"-p assume loop like -n but print line also, like sed",
2139"-P run program through C preprocessor before compilation",
2140"-s enable rudimentary parsing for switches after programfile",
2141"-S look for programfile using PATH environment variable",
2142"-T enable tainting checks",
2143"-u dump core after parsing program",
fb73857a 2144"-U allow unsafe operations",
aac3bd0d
GS		 2145"-v print version, subversion (includes VERY IMPORTANT perl info)",
2146"-V[:variable] print configuration summary (or a single Config.pm variable)",
2147"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS		 2148"-W enable all warnings",
2149"-X disable all warnings",
fb73857a 2150"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2151"\n",
2152NULL
2153};
76e3520e 2154 char **p = usage_msg;
fb73857a 2155
b0e47665
GS		 2156 PerlIO_printf(PerlIO_stdout(),
2157 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2158 name);
fb73857a 2159 while (*p)
b0e47665 2160 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW		 2161}
2162
79072805
LW		 2163/* This routine handles any switches that can be given during run */
2164
2165char *
864dbfa3 2166Perl_moreswitches(pTHX_ char *s)
79072805 2167{
ba210ebe 2168 STRLEN numlen;
c07a80fd 2169 U32 rschar;
79072805
LW		 2170
2171 switch (*s) {
2172 case '0':
a863c7d1 2173 {
53305cf1
NC		 2174 I32 flags = 0;
2175 numlen = 4;
2176 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
8bfdd7d9 2177 SvREFCNT_dec(PL_rs);
c07a80fd 2178 if (rschar & ~((U8)~0))
8bfdd7d9 2179 PL_rs = &PL_sv_undef;
c07a80fd 2180 else if (!rschar && numlen >= 2)
8bfdd7d9 2181 PL_rs = newSVpvn("", 0);
c07a80fd 2182 else {
2183 char ch = rschar;
8bfdd7d9 2184 PL_rs = newSVpvn(&ch, 1);
79072805
LW		 2185 }
2186 return s + numlen;
a863c7d1 2187 }
46487f74
GS		 2188 case 'C':
2189 PL_widesyscalls = TRUE;
2190 s++;
2191 return s;
2304df62 2192 case 'F':
3280af22 2193 PL_minus_F = TRUE;
ebce5377
RGS		 2194 PL_splitstr = ++s;
2195 while (*s && !isSPACE(*s)) ++s;
2196 *s = '\0';
2197 PL_splitstr = savepv(PL_splitstr);
2304df62 2198 return s;
79072805 2199 case 'a':
3280af22 2200 PL_minus_a = TRUE;
79072805
LW		 2201 s++;
2202 return s;
2203 case 'c':
3280af22 2204 PL_minus_c = TRUE;
79072805
LW		 2205 s++;
2206 return s;
2207 case 'd':
bbce6d69 2208 forbid_setid("-d");
4633a7c4 2209 s++;
70c94a19
RR		 2210 /* The following permits -d:Mod to accepts arguments following an =
2211 in the fashion that -MSome::Mod does. */
2212 if (*s == ':' || *s == '=') {
2213 char *start;
2214 SV *sv;
2215 sv = newSVpv("use Devel::", 0);
2216 start = ++s;
2217 /* We now allow -d:Module=Foo,Bar */
2218 while(isALNUM(*s) || *s==':') ++s;
2219 if (*s != '=')
2220 sv_catpv(sv, start);
2221 else {
2222 sv_catpvn(sv, start, s-start);
2223 sv_catpv(sv, " split(/,/,q{");
2224 sv_catpv(sv, ++s);
2225 sv_catpv(sv, "})");
2226 }
4633a7c4 2227 s += strlen(s);
70c94a19 2228 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2229 }
ed094faf 2230 if (!PL_perldb) {
3280af22 2231 PL_perldb = PERLDB_ALL;
a0d0e21e 2232 init_debugger();
ed094faf 2233 }
79072805
LW		 2234 return s;
2235 case 'D':
0453d815 2236 {
79072805 2237#ifdef DEBUGGING
bbce6d69 2238 forbid_setid("-D");
79072805 2239 if (isALPHA(s[1])) {
04932ac8
DM		 2240 /* if adding extra options, remember to update DEBUG_MASK */
2241 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW		 2242 char *d;
2243
93a17b20 2244 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2245 PL_debug |= 1 << (d - debopts);
79072805
LW		 2246 }
2247 else {
3280af22 2248 PL_debug = atoi(s+1);
79072805
LW		 2249 for (s++; isDIGIT(*s); s++) ;
2250 }
aea4f609 2251 PL_debug |= DEBUG_TOP_FLAG;
79072805 2252#else
0453d815
PM		 2253 if (ckWARN_d(WARN_DEBUGGING))
2254 Perl_warner(aTHX_ WARN_DEBUGGING,
2255 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2256 for (s++; isALNUM(*s); s++) ;
79072805
LW		 2257#endif
2258 /*SUPPRESS 530*/
2259 return s;
0453d815 2260 }
4633a7c4 2261 case 'h':
ac27b0f5 2262 usage(PL_origargv[0]);
6ad3d225 2263 PerlProc_exit(0);
79072805 2264 case 'i':
3280af22
NIS		 2265 if (PL_inplace)
2266 Safefree(PL_inplace);
2267 PL_inplace = savepv(s+1);
79072805 2268 /*SUPPRESS 530*/
3280af22 2269 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2270 if (*s) {
fb73857a 2271 *s++ = '\0';
7b8d334a
GS		 2272 if (*s == '-') /* Additional switches on #! line. */
2273 s++;
2274 }
fb73857a 2275 return s;
4e49a025 2276 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2277 forbid_setid("-I");
fb73857a 2278 ++s;
2279 while (*s && isSPACE(*s))
2280 ++s;
2281 if (*s) {
774d564b 2282 char *e, *p;
0df16ed7
GS		 2283 p = s;
2284 /* ignore trailing spaces (possibly followed by other switches) */
2285 do {
2286 for (e = p; *e && !isSPACE(*e); e++) ;
2287 p = e;
2288 while (isSPACE(*p))
2289 p++;
2290 } while (*p && *p != '-');
2291 e = savepvn(s, e-s);
9c8a64f0 2292 incpush(e, TRUE, TRUE);
0df16ed7
GS		 2293 Safefree(e);
2294 s = p;
2295 if (*s == '-')
2296 s++;
79072805
LW		 2297 }
2298 else
a67e862a 2299 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2300 return s;
79072805 2301 case 'l':
3280af22 2302 PL_minus_l = TRUE;
79072805 2303 s++;
7889fe52
NIS		 2304 if (PL_ors_sv) {
2305 SvREFCNT_dec(PL_ors_sv);
2306 PL_ors_sv = Nullsv;
2307 }
79072805 2308 if (isDIGIT(*s)) {
53305cf1 2309 I32 flags = 0;
7889fe52 2310 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC		 2311 numlen = 3 + (*s == '0');
2312 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW		 2313 s += numlen;
2314 }
2315 else {
8bfdd7d9 2316 if (RsPARA(PL_rs)) {
7889fe52
NIS		 2317 PL_ors_sv = newSVpvn("\n\n",2);
2318 }
2319 else {
8bfdd7d9 2320 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2321 }
79072805
LW		 2322 }
2323 return s;
1a30305b 2324 case 'M':
bbce6d69 2325 forbid_setid("-M"); /* XXX ? */
1a30305b 2326 /* FALL THROUGH */
2327 case 'm':
bbce6d69 2328 forbid_setid("-m"); /* XXX ? */
1a30305b 2329 if (*++s) {
a5f75d66 2330 char *start;
11343788 2331 SV *sv;
a5f75d66
AD		 2332 char *use = "use ";
2333 /* -M-foo == 'no foo' */
2334 if (*s == '-') { use = "no "; ++s; }
11343788 2335 sv = newSVpv(use,0);
a5f75d66 2336 start = s;
1a30305b 2337 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd 2338 while(isALNUM(*s) || *s==':') ++s;
2339 if (*s != '=') {
11343788 2340 sv_catpv(sv, start);
c07a80fd 2341 if (*(start-1) == 'm') {
2342 if (*s != '\0')
cea2e8a9 2343 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2344 sv_catpv( sv, " ()");
c07a80fd 2345 }
2346 } else {
6df41af2 2347 if (s == start)
be98fb35
GS		 2348 Perl_croak(aTHX_ "Module name required with -%c option",
2349 s[-1]);
11343788
MB		 2350 sv_catpvn(sv, start, s-start);
2351 sv_catpv(sv, " split(/,/,q{");
2352 sv_catpv(sv, ++s);
2353 sv_catpv(sv, "})");
c07a80fd 2354 }
1a30305b 2355 s += strlen(s);
5c831c24 2356 if (!PL_preambleav)
3280af22
NIS		 2357 PL_preambleav = newAV();
2358 av_push(PL_preambleav, sv);
1a30305b 2359 }
2360 else
cea2e8a9 2361 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2362 return s;
79072805 2363 case 'n':
3280af22 2364 PL_minus_n = TRUE;
79072805
LW		 2365 s++;
2366 return s;
2367 case 'p':
3280af22 2368 PL_minus_p = TRUE;
79072805
LW		 2369 s++;
2370 return s;
2371 case 's':
bbce6d69 2372 forbid_setid("-s");
3280af22 2373 PL_doswitches = TRUE;
79072805
LW		 2374 s++;
2375 return s;
463ee0b2 2376 case 'T':
3280af22 2377 if (!PL_tainting)
cea2e8a9 2378 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW		 2379 s++;
2380 return s;
79072805 2381 case 'u':
bf4acbe4
GS		 2382#ifdef MACOS_TRADITIONAL
2383 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2384#endif
3280af22 2385 PL_do_undump = TRUE;
79072805
LW		 2386 s++;
2387 return s;
2388 case 'U':
3280af22 2389 PL_unsafe = TRUE;
79072805
LW		 2390 s++;
2391 return s;
2392 case 'v':
8e9464f1 2393#if !defined(DGUX)
b0e47665 2394 PerlIO_printf(PerlIO_stdout(),
d2560b70 2395 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2396 PL_patchlevel, ARCHNAME));
8e9464f1
JH		 2397#else /* DGUX */
2398/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2399 PerlIO_printf(PerlIO_stdout(),
2400 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2401 PerlIO_printf(PerlIO_stdout(),
2402 Perl_form(aTHX_ " built under %s at %s %s\n",
2403 OSNAME, __DATE__, __TIME__));
2404 PerlIO_printf(PerlIO_stdout(),
2405 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2406 OSVERS));
8e9464f1
JH		 2407#endif /* !DGUX */
2408
fb73857a 2409#if defined(LOCAL_PATCH_COUNT)
2410 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS		 2411 PerlIO_printf(PerlIO_stdout(),
2412 "\n(with %d registered patch%s, "
2413 "see perl -V for more detail)",
2414 (int)LOCAL_PATCH_COUNT,
2415 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2416#endif
1a30305b 2417
b0e47665 2418 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2419 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH		 2420#ifdef MACOS_TRADITIONAL
2421 PerlIO_printf(PerlIO_stdout(),
03765510
JH		 2422 "\nMac OS port Copyright 1991-2001, Matthias Neeracher;\n"
2423 "maintained by Chris Nandor\n");
eae9c151 2424#endif
79072805 2425#ifdef MSDOS
b0e47665
GS		 2426 PerlIO_printf(PerlIO_stdout(),
2427 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff 2428#endif
2429#ifdef DJGPP
b0e47665
GS		 2430 PerlIO_printf(PerlIO_stdout(),
2431 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2432 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2433#endif
79072805 2434#ifdef OS2
b0e47665
GS		 2435 PerlIO_printf(PerlIO_stdout(),
2436 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2437 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2438#endif
79072805 2439#ifdef atarist
b0e47665
GS		 2440 PerlIO_printf(PerlIO_stdout(),
2441 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2442#endif
a3f9223b 2443#ifdef __BEOS__
b0e47665
GS		 2444 PerlIO_printf(PerlIO_stdout(),
2445 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2446#endif
1d84e8df 2447#ifdef MPE
b0e47665 2448 PerlIO_printf(PerlIO_stdout(),
dc22e1c4 2449 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2001\n");
1d84e8df 2450#endif
9d116dd7 2451#ifdef OEMVS
b0e47665
GS		 2452 PerlIO_printf(PerlIO_stdout(),
2453 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2454#endif
495c5fdc 2455#ifdef __VOS__
b0e47665
GS		 2456 PerlIO_printf(PerlIO_stdout(),
2457 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2458#endif
092bebab 2459#ifdef __OPEN_VM
b0e47665
GS		 2460 PerlIO_printf(PerlIO_stdout(),
2461 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2462#endif
a1a0e61e 2463#ifdef POSIX_BC
b0e47665
GS		 2464 PerlIO_printf(PerlIO_stdout(),
2465 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2466#endif
61ae2fbf 2467#ifdef __MINT__
b0e47665
GS		 2468 PerlIO_printf(PerlIO_stdout(),
2469 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2470#endif
f83d2536 2471#ifdef EPOC
b0e47665
GS		 2472 PerlIO_printf(PerlIO_stdout(),
2473 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2474#endif
e1caacb4
JH		 2475#ifdef UNDER_CE
2476 printf("WINCE port by Rainer Keuchel, 2001\n");
2477 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2478 wce_hitreturn();
2479#endif
baed7233
DL		 2480#ifdef BINARY_BUILD_NOTICE
2481 BINARY_BUILD_NOTICE;
2482#endif
b0e47665
GS		 2483 PerlIO_printf(PerlIO_stdout(),
2484 "\n\
79072805 2485Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2486GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS		 2487Complete documentation for Perl, including FAQ lists, should be found on\n\
2488this system using `man perl' or `perldoc perl'. If you have access to the\n\
2489Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2490 PerlProc_exit(0);
79072805 2491 case 'w':
599cee73 2492 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2493 PL_dowarn |= G_WARN_ON;
599cee73
PM		 2494 s++;
2495 return s;
2496 case 'W':
ac27b0f5 2497 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
d3a7d8c7 2498 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM		 2499 s++;
2500 return s;
2501 case 'X':
ac27b0f5 2502 PL_dowarn = G_WARN_ALL_OFF;
d3a7d8c7 2503 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW		 2504 s++;
2505 return s;
a0d0e21e 2506 case '*':
79072805
LW		 2507 case ' ':
2508 if (s[1] == '-') /* Additional switches on #! line. */
2509 return s+2;
2510 break;
a0d0e21e 2511 case '-':
79072805 2512 case 0:
51882d45 2513#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS		 2514 case '\r':
2515#endif
79072805
LW		 2516 case '\n':
2517 case '\t':
2518 break;
aa689395 2519#ifdef ALTERNATE_SHEBANG
2520 case 'S': /* OS/2 needs -S on "extproc" line. */
2521 break;
2522#endif
a0d0e21e 2523 case 'P':
3280af22 2524 if (PL_preprocess)
a0d0e21e
LW		 2525 return s+1;
2526 /* FALL THROUGH */
79072805 2527 default:
cea2e8a9 2528 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW		 2529 }
2530 return Nullch;
2531}
2532
2533/* compliments of Tom Christiansen */
2534
2535/* unexec() can be found in the Gnu emacs distribution */
ee580363 2536/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW		 2537
2538void
864dbfa3 2539Perl_my_unexec(pTHX)
79072805
LW		 2540{
2541#ifdef UNEXEC
46fc3d4c 2542 SV* prog;
2543 SV* file;
ee580363 2544 int status = 1;
79072805
LW		 2545 extern int etext;
2546
ee580363 2547 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2548 sv_catpv(prog, "/perl");
6b88bc9c 2549 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2550 sv_catpv(file, ".perldump");
79072805 2551
ee580363
GS		 2552 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2553 /* unexec prints msg to stderr in case of failure */
6ad3d225 2554 PerlProc_exit(status);
79072805 2555#else
a5f75d66
AD		 2556# ifdef VMS
2557# include <lib$routines.h>
2558 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2559# else
79072805 2560 ABORT(); /* for use with undump */
aa689395 2561# endif
a5f75d66 2562#endif
79072805
LW		 2563}
2564
cb68f92d
GS		 2565/* initialize curinterp */
2566STATIC void
cea2e8a9 2567S_init_interp(pTHX)
cb68f92d
GS		 2568{
2569
acfe0abc
GS		 2570#ifdef MULTIPLICITY
2571# define PERLVAR(var,type)
2572# define PERLVARA(var,n,type)
2573# if defined(PERL_IMPLICIT_CONTEXT)
2574# if defined(USE_5005THREADS)
2575# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2576# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS		 2577# else /* !USE_5005THREADS */
2578# define PERLVARI(var,type,init) aTHX->var = init;
2579# define PERLVARIC(var,type,init) aTHX->var = init;
2580# endif /* USE_5005THREADS */
3967c732 2581# else
acfe0abc
GS		 2582# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2583# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2584# endif
acfe0abc
GS		 2585# include "intrpvar.h"
2586# ifndef USE_5005THREADS
2587# include "thrdvar.h"
2588# endif
2589# undef PERLVAR
2590# undef PERLVARA
2591# undef PERLVARI
2592# undef PERLVARIC
2593#else
2594# define PERLVAR(var,type)
2595# define PERLVARA(var,n,type)
2596# define PERLVARI(var,type,init) PL_##var = init;
2597# define PERLVARIC(var,type,init) PL_##var = init;
2598# include "intrpvar.h"
2599# ifndef USE_5005THREADS
2600# include "thrdvar.h"
2601# endif
2602# undef PERLVAR
2603# undef PERLVARA
2604# undef PERLVARI
2605# undef PERLVARIC
cb68f92d
GS		 2606#endif
2607
cb68f92d
GS		 2608}
2609
76e3520e 2610STATIC void
cea2e8a9 2611S_init_main_stash(pTHX)
79072805 2612{
463ee0b2 2613 GV *gv;
6e72f9df 2614
3d47000e 2615
ac27b0f5 2616
3280af22 2617 PL_curstash = PL_defstash = newHV();
79cb57f6 2618 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW		 2619 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2620 SvREFCNT_dec(GvHV(gv));
3280af22 2621 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2622 SvREADONLY_on(gv);
3280af22
NIS		 2623 HvNAME(PL_defstash) = savepv("main");
2624 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2625 GvMULTI_on(PL_incgv);
2626 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2627 GvMULTI_on(PL_hintgv);
2628 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2629 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2630 GvMULTI_on(PL_errgv);
2631 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2632 GvMULTI_on(PL_replgv);
cea2e8a9 2633 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB		 2634 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2635 sv_setpvn(ERRSV, "", 0);
3280af22 2636 PL_curstash = PL_defstash;
11faa288 2637 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2638 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2639 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2640 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2641 /* We must init $/ before switches are processed. */
864dbfa3 2642 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW		 2643}
2644
76e3520e 2645STATIC void
cea2e8a9 2646S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2647{
6c4ab083 2648 *fdscript = -1;
79072805 2649
3280af22
NIS		 2650 if (PL_e_script) {
2651 PL_origfilename = savepv("-e");
96436eeb 2652 }
6c4ab083
GS		 2653 else {
2654 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2655 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS		 2656
2657 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2658 char *s = scriptname + 8;
2659 *fdscript = atoi(s);
2660 while (isDIGIT(*s))
2661 s++;
2662 if (*s) {
2663 scriptname = savepv(s + 1);
3280af22
NIS		 2664 Safefree(PL_origfilename);
2665 PL_origfilename = scriptname;
6c4ab083
GS		 2666 }
2667 }
2668 }
2669
f4dd75d9
GS		 2670#ifdef USE_ITHREADS
2671 Safefree(CopFILE(PL_curcop));
2672#else
2673 SvREFCNT_dec(CopFILEGV(PL_curcop));
2674#endif
57843af0 2675 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2676 if (strEQ(PL_origfilename,"-"))
79072805 2677 scriptname = "";
01f988be 2678 if (*fdscript >= 0) {
3280af22 2679 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
96436eeb 2680#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS		 2681 if (PL_rsfp)
2682 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb 2683#endif
2684 }
3280af22 2685 else if (PL_preprocess) {
46fc3d4c 2686 char *cpp_cfg = CPPSTDIN;
79cb57f6 2687 SV *cpp = newSVpvn("",0);
46fc3d4c 2688 SV *cmd = NEWSV(0,0);
2689
2690 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2691 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2692 sv_catpv(cpp, cpp_cfg);
79072805 2693
0df16ed7 2694 sv_catpvn(sv, "-I", 2);
fed7345c 2695 sv_catpv(sv,PRIVLIB_EXP);
46fc3d4c 2696
14953ddc
MB		 2697 DEBUG_P(PerlIO_printf(Perl_debug_log,
2698 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2699 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
52853b95 2700#if defined(MSDOS) || defined(WIN32)
cea2e8a9 2701 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW		 2702sed %s -e \"/^[^#]/b\" \
2703 -e \"/^#[ ]*include[ ]/b\" \
2704 -e \"/^#[ ]*define[ ]/b\" \
2705 -e \"/^#[ ]*if[ ]/b\" \
2706 -e \"/^#[ ]*ifdef[ ]/b\" \
2707 -e \"/^#[ ]*ifndef[ ]/b\" \
2708 -e \"/^#[ ]*else/b\" \
2709 -e \"/^#[ ]*elif[ ]/b\" \
2710 -e \"/^#[ ]*undef[ ]/b\" \
2711 -e \"/^#[ ]*endif/b\" \
2712 -e \"s/^#.*//\" \
894356b3 2713 %s | %"SVf" -C %"SVf" %s",
6b88bc9c 2714 (PL_doextract ? "-e \"1,/^#/d\n\"" : ""),
79072805 2715#else
092bebab 2716# ifdef __OPEN_VM
cea2e8a9 2717 Perl_sv_setpvf(aTHX_ cmd, "\
092bebab
JH		 2718%s %s -e '/^[^#]/b' \
2719 -e '/^#[ ]*include[ ]/b' \
2720 -e '/^#[ ]*define[ ]/b' \
2721 -e '/^#[ ]*if[ ]/b' \
2722 -e '/^#[ ]*ifdef[ ]/b' \
2723 -e '/^#[ ]*ifndef[ ]/b' \
2724 -e '/^#[ ]*else/b' \
2725 -e '/^#[ ]*elif[ ]/b' \
2726 -e '/^#[ ]*undef[ ]/b' \
2727 -e '/^#[ ]*endif/b' \
2728 -e 's/^[ ]*#.*//' \
894356b3 2729 %s | %"SVf" %"SVf" %s",
092bebab 2730# else
cea2e8a9 2731 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW		 2732%s %s -e '/^[^#]/b' \
2733 -e '/^#[ ]*include[ ]/b' \
2734 -e '/^#[ ]*define[ ]/b' \
2735 -e '/^#[ ]*if[ ]/b' \
2736 -e '/^#[ ]*ifdef[ ]/b' \
2737 -e '/^#[ ]*ifndef[ ]/b' \
2738 -e '/^#[ ]*else/b' \
2739 -e '/^#[ ]*elif[ ]/b' \
2740 -e '/^#[ ]*undef[ ]/b' \
2741 -e '/^#[ ]*endif/b' \
2742 -e 's/^[ ]*#.*//' \
894356b3 2743 %s | %"SVf" -C %"SVf" %s",
092bebab 2744# endif
79072805
LW		 2745#ifdef LOC_SED
2746 LOC_SED,
2747#else
2748 "sed",
2749#endif
3280af22 2750 (PL_doextract ? "-e '1,/^#/d\n'" : ""),
79072805 2751#endif
46fc3d4c 2752 scriptname, cpp, sv, CPPMINUS);
3280af22 2753 PL_doextract = FALSE;
79072805 2754#ifdef IAMSUID /* actually, this is caught earlier */
b28d0864 2755 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
79072805 2756#ifdef HAS_SETEUID
b28d0864 2757 (void)seteuid(PL_uid); /* musn't stay setuid root */
79072805
LW		 2758#else
2759#ifdef HAS_SETREUID
b28d0864 2760 (void)setreuid((Uid_t)-1, PL_uid);
85e6fe83
LW		 2761#else
2762#ifdef HAS_SETRESUID
b28d0864 2763 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
79072805 2764#else
b28d0864 2765 PerlProc_setuid(PL_uid);
79072805
LW		 2766#endif
2767#endif
85e6fe83 2768#endif
b28d0864 2769 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2770 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805
LW		 2771 }
2772#endif /* IAMSUID */
0a6c758d 2773
04fee9b5
NIS		 2774 DEBUG_P(PerlIO_printf(Perl_debug_log,
2775 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS		 2776 SvPVX(cmd)));
2777
3280af22 2778 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c 2779 SvREFCNT_dec(cmd);
2780 SvREFCNT_dec(cpp);
79072805
LW		 2781 }
2782 else if (!*scriptname) {
bbce6d69 2783 forbid_setid("program input from stdin");
3280af22 2784 PL_rsfp = PerlIO_stdin();
79072805 2785 }
96436eeb 2786 else {
3280af22 2787 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
96436eeb 2788#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS		 2789 if (PL_rsfp)
2790 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb 2791#endif
2792 }
3280af22 2793 if (!PL_rsfp) {
13281fa4 2794#ifdef DOSUID
a687059c 2795#ifndef IAMSUID /* in case script is not readable before setuid */
6b88bc9c 2796 if (PL_euid &&
cc49e20b 2797 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
6b88bc9c
GS		 2798 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2799 {
46fc3d4c 2800 /* try again */
a7cb1f99 2801 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 2802 (int)PERL_REVISION, (int)PERL_VERSION,
2803 (int)PERL_SUBVERSION), PL_origargv);
cea2e8a9 2804 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 2805 }
2806#endif
2807#endif
584d69ec
JH		 2808#ifdef IAMSUID
2809 errno = EPERM;
2810 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2811 Strerror(errno));
2812#else
cea2e8a9 2813 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
cc49e20b 2814 CopFILE(PL_curcop), Strerror(errno));
584d69ec 2815#endif
13281fa4 2816 }
79072805 2817}
8d063cd8 2818
7b89560d
JH		 2819/* Mention
2820 * I_SYSSTATVFS HAS_FSTATVFS
2821 * I_SYSMOUNT
c890dc6c 2822 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH		 2823 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2824 * here so that metaconfig picks them up. */
2825
104d25b7 2826#ifdef IAMSUID
864dbfa3 2827STATIC int
e688b231 2828S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2829{
0545a864
JH		 2830 int check_okay = 0; /* able to do all the required sys/libcalls */
2831 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2832/*
ad27e871 2833 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2834 * fstatvfs() is UNIX98.
0545a864 2835 * fstatfs() is 4.3 BSD.
ad27e871 2836 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH		 2837 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2838 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH		 2839 */
2840
6439433f
JH		 2841#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2842
2843# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2844 defined(HAS_FSTATVFS)
2845# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2846 struct statvfs stfs;
6439433f 2847
104d25b7
JH		 2848 check_okay = fstatvfs(fd, &stfs) == 0;
2849 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2850# endif /* fstatvfs */
ac27b0f5 2851
6439433f
JH		 2852# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2853 defined(PERL_MOUNT_NOSUID) && \
2854 defined(HAS_FSTATFS) && \
2855 defined(HAS_STRUCT_STATFS) && \
2856 defined(HAS_STRUCT_STATFS_F_FLAGS)
2857# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2858 struct statfs stfs;
6439433f 2859
104d25b7 2860 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2861 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH		 2862# endif /* fstatfs */
2863
2864# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2865 defined(PERL_MOUNT_NOSUID) && \
2866 defined(HAS_FSTAT) && \
2867 defined(HAS_USTAT) && \
2868 defined(HAS_GETMNT) && \
2869 defined(HAS_STRUCT_FS_DATA) && \
2870 defined(NOSTAT_ONE)
2871# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2872 struct stat fdst;
6439433f 2873
0545a864 2874 if (fstat(fd, &fdst) == 0) {
6439433f
JH		 2875 struct ustat us;
2876 if (ustat(fdst.st_dev, &us) == 0) {
2877 struct fs_data fsd;
2878 /* NOSTAT_ONE here because we're not examining fields which
2879 * vary between that case and STAT_ONE. */
ad27e871 2880 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH		 2881 size_t cmplen = sizeof(us.f_fname);
2882 if (sizeof(fsd.fd_req.path) < cmplen)
2883 cmplen = sizeof(fsd.fd_req.path);
2884 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2885 fdst.st_dev == fsd.fd_req.dev) {
2886 check_okay = 1;
2887 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2888 }
2889 }
2890 }
2891 }
0545a864 2892 }
6439433f
JH		 2893# endif /* fstat+ustat+getmnt */
2894
2895# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2896 defined(HAS_GETMNTENT) && \
2897 defined(HAS_HASMNTOPT) && \
2898 defined(MNTOPT_NOSUID)
2899# define FD_ON_NOSUID_CHECK_OKAY
2900 FILE *mtab = fopen("/etc/mtab", "r");
2901 struct mntent *entry;
2902 struct stat stb, fsb;
104d25b7
JH		 2903
2904 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH		 2905 while (entry = getmntent(mtab)) {
2906 if (stat(entry->mnt_dir, &fsb) == 0
2907 && fsb.st_dev == stb.st_dev)
2908 {
2909 /* found the filesystem */
2910 check_okay = 1;
2911 if (hasmntopt(entry, MNTOPT_NOSUID))
2912 on_nosuid = 1;
2913 break;
2914 } /* A single fs may well fail its stat(). */
2915 }
104d25b7
JH		 2916 }
2917 if (mtab)
6439433f
JH		 2918 fclose(mtab);
2919# endif /* getmntent+hasmntopt */
0545a864 2920
ac27b0f5 2921 if (!check_okay)
0545a864 2922 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH		 2923 return on_nosuid;
2924}
2925#endif /* IAMSUID */
2926
76e3520e 2927STATIC void
cea2e8a9 2928S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2929{
155aba94 2930#ifdef IAMSUID
96436eeb 2931 int which;
155aba94 2932#endif
96436eeb 2933
13281fa4
LW		 2934 /* do we need to emulate setuid on scripts? */
2935
2936 /* This code is for those BSD systems that have setuid #! scripts disabled
2937 * in the kernel because of a security problem. Merely defining DOSUID
2938 * in perl will not fix that problem, but if you have disabled setuid
2939 * scripts in the kernel, this will attempt to emulate setuid and setgid
2940 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW		 2941 * root version must be called suidperl or sperlN.NNN. If regular perl
2942 * discovers that it has opened a setuid script, it calls suidperl with
2943 * the same argv that it had. If suidperl finds that the script it has
2944 * just opened is NOT setuid root, it sets the effective uid back to the
2945 * uid. We don't just make perl setuid root because that loses the
2946 * effective uid we had before invoking perl, if it was different from the
2947 * uid.
13281fa4
LW		 2948 *
2949 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2950 * be defined in suidperl only. suidperl must be setuid root. The
2951 * Configure script will set this up for you if you want it.
2952 */
a687059c 2953
13281fa4 2954#ifdef DOSUID
6e72f9df 2955 char *s, *s2;
a0d0e21e 2956
b28d0864 2957 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2958 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2959 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2960 I32 len;
2d8e6c8d 2961 STRLEN n_a;
13281fa4 2962
a687059c 2963#ifdef IAMSUID
fe14fcc3 2964#ifndef HAS_SETREUID
a687059c
LW		 2965 /* On this access check to make sure the directories are readable,
2966 * there is actually a small window that the user could use to make
2967 * filename point to an accessible directory. So there is a faint
2968 * chance that someone could execute a setuid script down in a
2969 * non-accessible directory. I don't know what to do about that.
2970 * But I don't think it's too important. The manual lies when
2971 * it says access() is useful in setuid programs.
2972 */
cc49e20b 2973 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2974 Perl_croak(aTHX_ "Permission denied");
a687059c
LW		 2975#else
2976 /* If we can swap euid and uid, then we can determine access rights
2977 * with a simple stat of the file, and then compare device and
2978 * inode to make sure we did stat() on the same file we opened.
2979 * Then we just have to make sure he or she can execute it.
2980 */
2981 {
2982 struct stat tmpstatbuf;
2983
85e6fe83
LW		 2984 if (
2985#ifdef HAS_SETREUID
b28d0864 2986 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW		 2987#else
2988# if HAS_SETRESUID
b28d0864 2989 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 2990# endif
85e6fe83 2991#endif
b28d0864 2992 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 2993 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 2994 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 2995 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 2996#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 2997 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 2998 Perl_croak(aTHX_ "Permission denied");
104d25b7 2999#endif
b28d0864
NIS		 3000 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3001 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3002 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3003 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3004 }
85e6fe83
LW		 3005 if (
3006#ifdef HAS_SETREUID
b28d0864 3007 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW		 3008#else
3009# if defined(HAS_SETRESUID)
b28d0864 3010 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3011# endif
85e6fe83 3012#endif
b28d0864 3013 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3014 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3015 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3016 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3017 }
fe14fcc3 3018#endif /* HAS_SETREUID */
a687059c
LW		 3019#endif /* IAMSUID */
3020
b28d0864 3021 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3022 Perl_croak(aTHX_ "Permission denied");
b28d0864 3023 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3024 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3025 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3026 CopLINE_inc(PL_curcop);
6b88bc9c 3027 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3028 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3029 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3030 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3031 if (*s == ' ') s++;
45d8adaa 3032 while (!isSPACE(*s)) s++;
2d8e6c8d 3033 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df 3034 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3035 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3036 Perl_croak(aTHX_ "Not a perl script");
a687059c 3037 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW		 3038 /*
3039 * #! arg must be what we saw above. They can invoke it by
3040 * mentioning suidperl explicitly, but they may not add any strange
3041 * arguments beyond what #! says if they do invoke suidperl that way.
3042 */
3043 len = strlen(validarg);
3044 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3045 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3046 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW		 3047
3048#ifndef IAMSUID
b28d0864
NIS		 3049 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3050 PL_euid == PL_statbuf.st_uid)
3051 if (!PL_do_undump)
cea2e8a9 3052 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3053FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3054#endif /* IAMSUID */
13281fa4 3055
b28d0864
NIS		 3056 if (PL_euid) { /* oops, we're not the setuid root perl */
3057 (void)PerlIO_close(PL_rsfp);
13281fa4 3058#ifndef IAMSUID
46fc3d4c 3059 /* try again */
a7cb1f99 3060 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3061 (int)PERL_REVISION, (int)PERL_VERSION,
3062 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3063#endif
cea2e8a9 3064 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 3065 }
3066
b28d0864 3067 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3068#ifdef HAS_SETEGID
b28d0864 3069 (void)setegid(PL_statbuf.st_gid);
a687059c 3070#else
fe14fcc3 3071#ifdef HAS_SETREGID
b28d0864 3072 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW		 3073#else
3074#ifdef HAS_SETRESGID
b28d0864 3075 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3076#else
b28d0864 3077 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW		 3078#endif
3079#endif
85e6fe83 3080#endif
b28d0864 3081 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3082 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3083 }
b28d0864
NIS		 3084 if (PL_statbuf.st_mode & S_ISUID) {
3085 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3086#ifdef HAS_SETEUID
b28d0864 3087 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3088#else
fe14fcc3 3089#ifdef HAS_SETREUID
b28d0864 3090 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW		 3091#else
3092#ifdef HAS_SETRESUID
b28d0864 3093 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3094#else
b28d0864 3095 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW		 3096#endif
3097#endif
85e6fe83 3098#endif
b28d0864 3099 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3100 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3101 }
b28d0864 3102 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3103#ifdef HAS_SETEUID
b28d0864 3104 (void)seteuid((Uid_t)PL_uid);
a687059c 3105#else
fe14fcc3 3106#ifdef HAS_SETREUID
b28d0864 3107 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3108#else
85e6fe83 3109#ifdef HAS_SETRESUID
b28d0864 3110 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3111#else
b28d0864 3112 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3113#endif
a687059c
LW		 3114#endif
3115#endif
b28d0864 3116 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3117 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3118 }
748a9306 3119 init_ids();
b28d0864 3120 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3121 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW		 3122 }
3123#ifdef IAMSUID
6b88bc9c 3124 else if (PL_preprocess)
cea2e8a9 3125 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3126 else if (fdscript >= 0)
cea2e8a9 3127 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3128 else
cea2e8a9 3129 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb 3130
3131 /* We absolutely must clear out any saved ids here, so we */
3132 /* exec the real perl, substituting fd script for scriptname. */
3133 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS		 3134 PerlIO_rewind(PL_rsfp);
3135 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS		 3136 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3137 if (!PL_origargv[which])
cea2e8a9
GS		 3138 Perl_croak(aTHX_ "Permission denied");
3139 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3140 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3141#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3142 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3143#endif
a7cb1f99 3144 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3145 (int)PERL_REVISION, (int)PERL_VERSION,
3146 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3147 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3148#endif /* IAMSUID */
a687059c 3149#else /* !DOSUID */
3280af22 3150 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3151#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS		 3152 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3153 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3154 ||
b28d0864 3155 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3156 )
b28d0864 3157 if (!PL_do_undump)
cea2e8a9 3158 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3159FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3160#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3161 /* not set-id, must be wrapped */
a687059c 3162 }
13281fa4 3163#endif /* DOSUID */
79072805 3164}
13281fa4 3165
76e3520e 3166STATIC void
cea2e8a9 3167S_find_beginning(pTHX)
79072805 3168{
6e72f9df 3169 register char *s, *s2;
33b78306
LW		 3170
3171 /* skip forward in input to the real script? */
3172
bbce6d69 3173 forbid_setid("-x");
bf4acbe4 3174#ifdef MACOS_TRADITIONAL
084592ab 3175 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3176
bf4acbe4
GS		 3177 while (PL_doextract || gMacPerl_AlwaysExtract) {
3178 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3179 if (!gMacPerl_AlwaysExtract)
3180 Perl_croak(aTHX_ "No Perl script found in input\n");
3181
3182 if (PL_doextract) /* require explicit override ? */
3183 if (!OverrideExtract(PL_origfilename))
3184 Perl_croak(aTHX_ "User aborted script\n");
3185 else
3186 PL_doextract = FALSE;
3187
3188 /* Pater peccavi, file does not have #! */
3189 PerlIO_rewind(PL_rsfp);
ac27b0f5 3190
bf4acbe4
GS		 3191 break;
3192 }
3193#else
3280af22
NIS		 3194 while (PL_doextract) {
3195 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3196 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3197#endif
4f0c37ba
IZ		 3198 s2 = s;
3199 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS		 3200 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3201 PL_doextract = FALSE;
6e72f9df 3202 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3203 s2 = s;
3204 while (*s == ' ' || *s == '\t') s++;
3205 if (*s++ == '-') {
3206 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3207 if (strnEQ(s2-4,"perl",4))
3208 /*SUPPRESS 530*/
155aba94
GS		 3209 while ((s = moreswitches(s)))
3210 ;
33b78306 3211 }
95e8664e
CN		 3212#ifdef MACOS_TRADITIONAL
3213 break;
3214#endif
83025b21
LW		 3215 }
3216 }
3217}
3218
afe37c7d 3219
76e3520e 3220STATIC void
cea2e8a9 3221S_init_ids(pTHX)
352d5a3a 3222{
d8eceb89
JH		 3223 PL_uid = PerlProc_getuid();
3224 PL_euid = PerlProc_geteuid();
3225 PL_gid = PerlProc_getgid();
3226 PL_egid = PerlProc_getegid();
748a9306 3227#ifdef VMS
b28d0864
NIS		 3228 PL_uid |= PL_gid << 16;
3229 PL_euid |= PL_egid << 16;
748a9306 3230#endif
3280af22 3231 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3232}
79072805 3233
76e3520e 3234STATIC void
cea2e8a9 3235S_forbid_setid(pTHX_ char *s)
bbce6d69 3236{
3280af22 3237 if (PL_euid != PL_uid)
cea2e8a9 3238 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3239 if (PL_egid != PL_gid)
cea2e8a9 3240 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69 3241}
3242
1ee4443e
IZ		 3243void
3244Perl_init_debugger(pTHX)
748a9306 3245{
1ee4443e
IZ		 3246 HV *ostash = PL_curstash;
3247
3280af22
NIS		 3248 PL_curstash = PL_debstash;
3249 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3250 AvREAL_off(PL_dbargs);
3251 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3252 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3253 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3254 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3255 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3256 sv_setiv(PL_DBsingle, 0);
3280af22 3257 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3258 sv_setiv(PL_DBtrace, 0);
3280af22 3259 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3260 sv_setiv(PL_DBsignal, 0);
1ee4443e 3261 PL_curstash = ostash;
352d5a3a
LW		 3262}
3263
2ce36478
SM		 3264#ifndef STRESS_REALLOC
3265#define REASONABLE(size) (size)
3266#else
3267#define REASONABLE(size) (1) /* unreasonable */
3268#endif
3269
11343788 3270void
cea2e8a9 3271Perl_init_stacks(pTHX)
79072805 3272{
e336de0d 3273 /* start with 128-item stack and 8K cxstack */
3280af22 3274 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3275 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS		 3276 PL_curstackinfo->si_type = PERLSI_MAIN;
3277 PL_curstack = PL_curstackinfo->si_stack;
3278 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3279
3280af22
NIS		 3280 PL_stack_base = AvARRAY(PL_curstack);
3281 PL_stack_sp = PL_stack_base;
3282 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3283
3280af22
NIS		 3284 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3285 PL_tmps_floor = -1;
3286 PL_tmps_ix = -1;
3287 PL_tmps_max = REASONABLE(128);
8990e307 3288
3280af22
NIS		 3289 New(54,PL_markstack,REASONABLE(32),I32);
3290 PL_markstack_ptr = PL_markstack;
3291 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3292
ce2f7c3b 3293 SET_MARK_OFFSET;
e336de0d 3294
3280af22
NIS		 3295 New(54,PL_scopestack,REASONABLE(32),I32);
3296 PL_scopestack_ix = 0;
3297 PL_scopestack_max = REASONABLE(32);
79072805 3298
3280af22
NIS		 3299 New(54,PL_savestack,REASONABLE(128),ANY);
3300 PL_savestack_ix = 0;
3301 PL_savestack_max = REASONABLE(128);
79072805 3302
3280af22
NIS		 3303 New(54,PL_retstack,REASONABLE(16),OP*);
3304 PL_retstack_ix = 0;
3305 PL_retstack_max = REASONABLE(16);
378cc40b 3306}
33b78306 3307
2ce36478
SM		 3308#undef REASONABLE
3309
76e3520e 3310STATIC void
cea2e8a9 3311S_nuke_stacks(pTHX)
6e72f9df 3312{
3280af22
NIS		 3313 while (PL_curstackinfo->si_next)
3314 PL_curstackinfo = PL_curstackinfo->si_next;
3315 while (PL_curstackinfo) {
3316 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3317 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS		 3318 Safefree(PL_curstackinfo->si_cxstack);
3319 Safefree(PL_curstackinfo);
3320 PL_curstackinfo = p;
e336de0d 3321 }
3280af22
NIS		 3322 Safefree(PL_tmps_stack);
3323 Safefree(PL_markstack);
3324 Safefree(PL_scopestack);
3325 Safefree(PL_savestack);
3326 Safefree(PL_retstack);
378cc40b 3327}
33b78306 3328
76e3520e 3329STATIC void
cea2e8a9 3330S_init_lexer(pTHX)
8990e307 3331{
06039172 3332 PerlIO *tmpfp;
3280af22
NIS		 3333 tmpfp = PL_rsfp;
3334 PL_rsfp = Nullfp;
3335 lex_start(PL_linestr);
3336 PL_rsfp = tmpfp;
79cb57f6 3337 PL_subname = newSVpvn("main",4);
8990e307
LW		 3338}
3339
76e3520e 3340STATIC void
cea2e8a9 3341S_init_predump_symbols(pTHX)
45d8adaa 3342{
93a17b20 3343 GV *tmpgv;
af8c498a 3344 IO *io;
79072805 3345
864dbfa3 3346 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS		 3347 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3348 GvMULTI_on(PL_stdingv);
af8c498a 3349 io = GvIOp(PL_stdingv);
a04651f4 3350 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3351 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3352 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3353 GvMULTI_on(tmpgv);
af8c498a 3354 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3355
85e6fe83 3356 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3357 GvMULTI_on(tmpgv);
af8c498a 3358 io = GvIOp(tmpgv);
a04651f4 3359 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3360 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3361 setdefout(tmpgv);
adbc6bb1 3362 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3363 GvMULTI_on(tmpgv);
af8c498a 3364 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3365
bf49b057
GS		 3366 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3367 GvMULTI_on(PL_stderrgv);
3368 io = GvIOp(PL_stderrgv);
a04651f4 3369 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3370 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3371 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3372 GvMULTI_on(tmpgv);
af8c498a 3373 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3374
3280af22 3375 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3376
bf4acbe4
GS		 3377 if (PL_osname)
3378 Safefree(PL_osname);
3379 PL_osname = savepv(OSNAME);
79072805 3380}
33b78306 3381
a11ec5a9
RGS		 3382void
3383Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
33b78306 3384{
79072805 3385 char *s;
79072805 3386 argc--,argv++; /* skip name of script */
3280af22 3387 if (PL_doswitches) {
79072805
LW		 3388 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3389 if (!argv[0][1])
3390 break;
379d538a 3391 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW		 3392 argc--,argv++;
3393 break;
3394 }
155aba94 3395 if ((s = strchr(argv[0], '='))) {
79072805 3396 *s++ = '\0';
85e6fe83 3397 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW		 3398 }
3399 else
85e6fe83 3400 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3401 }
79072805 3402 }
a11ec5a9
RGS		 3403 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3404 GvMULTI_on(PL_argvgv);
3405 (void)gv_AVadd(PL_argvgv);
3406 av_clear(GvAVn(PL_argvgv));
3407 for (; argc > 0; argc--,argv++) {
3408 SV *sv = newSVpv(argv[0],0);
3409 av_push(GvAVn(PL_argvgv),sv);
3410 if (PL_widesyscalls)
3411 (void)sv_utf8_decode(sv);
3412 }
3413 }
3414}
3415
04fee9b5
NIS		 3416#ifdef HAS_PROCSELFEXE
3417/* This is a function so that we don't hold on to MAXPATHLEN
8338e367 3418 bytes of stack longer than necessary
04fee9b5
NIS		 3419 */
3420STATIC void
3421S_procself_val(pTHX_ SV *sv, char *arg0)
3422{
3423 char buf[MAXPATHLEN];
d13a6521 3424 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
04fee9b5
NIS		 3425 if (len > 0) {
3426 sv_setpvn(sv,buf,len);
3427 }
3428 else {
3429 sv_setpv(sv,arg0);
3430 }
3431}
3432#endif /* HAS_PROCSELFEXE */
3433
a11ec5a9
RGS		 3434STATIC void
3435S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3436{
3437 char *s;
3438 SV *sv;
3439 GV* tmpgv;
3440#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
3441 char **dup_env_base = 0;
3442 int dup_env_count = 0;
3443#endif
3444
3280af22
NIS		 3445 PL_toptarget = NEWSV(0,0);
3446 sv_upgrade(PL_toptarget, SVt_PVFM);
3447 sv_setpvn(PL_toptarget, "", 0);
3448 PL_bodytarget = NEWSV(0,0);
3449 sv_upgrade(PL_bodytarget, SVt_PVFM);
3450 sv_setpvn(PL_bodytarget, "", 0);
3451 PL_formtarget = PL_bodytarget;
79072805 3452
bbce6d69 3453 TAINT;
a11ec5a9
RGS		 3454
3455 init_argv_symbols(argc,argv);
3456
155aba94 3457 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS		 3458#ifdef MACOS_TRADITIONAL
3459 /* $0 is not majick on a Mac */
3460 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3461#else
3280af22 3462 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3463 magicname("0", "0", 1);
bf4acbe4 3464#endif
79072805 3465 }
04fee9b5
NIS		 3466 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))) {/* $^X */
3467#ifdef HAS_PROCSELFEXE
3468 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
3469#else
8338e367 3470#ifdef OS2
23da6c43 3471 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
8338e367
JH		 3472#else