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[perl5.git] / perl.c
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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 275
ce333219
JH		 276#ifdef DEBUGGING
277 sv_setpvn(PERL_DEBUG_PAD(0), "", 0);
278 sv_setpvn(PERL_DEBUG_PAD(1), "", 0);
279 sv_setpvn(PERL_DEBUG_PAD(2), "", 0);
280#endif
281
3d47000e
AB		 282 /* Note that strtab is a rather special HV. Assumptions are made
283 about not iterating on it, and not adding tie magic to it.
284 It is properly deallocated in perl_destruct() */
285 PL_strtab = newHV();
286
287#ifdef USE_5005THREADS
288 MUTEX_INIT(&PL_strtab_mutex);
289#endif
290 HvSHAREKEYS_off(PL_strtab); /* mandatory */
291 hv_ksplit(PL_strtab, 512);
292
0631ea03
AB		 293#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
294 _dyld_lookup_and_bind
295 ("__environ", (unsigned long *) &environ_pointer, NULL);
296#endif /* environ */
297
298#ifdef USE_ENVIRON_ARRAY
299 PL_origenviron = environ;
300#endif
301
8990e307 302 ENTER;
79072805
LW		 303}
304
954c1994
GS		 305/*
306=for apidoc perl_destruct
307
308Shuts down a Perl interpreter. See L<perlembed>.
309
310=cut
311*/
312
31d77e54 313int
0cb96387 314perl_destruct(pTHXx)
79072805 315{
7c474504 316 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 317 HV *hv;
4d1ff10f 318#ifdef USE_5005THREADS
33f46ff6 319 Thread t;
cea2e8a9 320 dTHX;
4d1ff10f 321#endif /* USE_5005THREADS */
8990e307 322
7766f137
GS		 323 /* wait for all pseudo-forked children to finish */
324 PERL_WAIT_FOR_CHILDREN;
325
4d1ff10f 326#ifdef USE_5005THREADS
0f15f207 327#ifndef FAKE_THREADS
8023c3ce
MB		 328 /* Pass 1 on any remaining threads: detach joinables, join zombies */
329 retry_cleanup:
533c011a 330 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 331 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 332 "perl_destruct: waiting for %d threads...\n",
533c011a 333 PL_nthreads - 1));
33f46ff6 334 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB		 335 MUTEX_LOCK(&t->mutex);
336 switch (ThrSTATE(t)) {
337 AV *av;
c7848ba1 338 case THRf_ZOMBIE:
bf49b057 339 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 340 "perl_destruct: joining zombie %p\n", t));
605e5515
MB		 341 ThrSETSTATE(t, THRf_DEAD);
342 MUTEX_UNLOCK(&t->mutex);
533c011a 343 PL_nthreads--;
8023c3ce
MB		 344 /*
345 * The SvREFCNT_dec below may take a long time (e.g. av
346 * may contain an object scalar whose destructor gets
347 * called) so we have to unlock threads_mutex and start
348 * all over again.
349 */
533c011a 350 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 351 JOIN(t, &av);
605e5515 352 SvREFCNT_dec((SV*)av);
bf49b057 353 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 354 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 355 goto retry_cleanup;
c7848ba1 356 case THRf_R_JOINABLE:
bf49b057 357 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 358 "perl_destruct: detaching thread %p\n", t));
359 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 360 /*
c7848ba1
MB		 361 * We unlock threads_mutex and t->mutex in the opposite order
362 * from which we locked them just so that DETACH won't
363 * deadlock if it panics. It's only a breach of good style
364 * not a bug since they are unlocks not locks.
365 */
533c011a 366 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB		 367 DETACH(t);
368 MUTEX_UNLOCK(&t->mutex);
8023c3ce 369 goto retry_cleanup;
c7848ba1 370 default:
bf49b057 371 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 372 "perl_destruct: ignoring %p (state %u)\n",
373 t, ThrSTATE(t)));
374 MUTEX_UNLOCK(&t->mutex);
c7848ba1 375 /* fall through and out */
33f46ff6
MB		 376 }
377 }
8023c3ce
MB		 378 /* We leave the above "Pass 1" loop with threads_mutex still locked */
379
380 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 381 while (PL_nthreads > 1)
11343788 382 {
bf49b057 383 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 384 "perl_destruct: final wait for %d threads\n",
533c011a
NIS		 385 PL_nthreads - 1));
386 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB		 387 }
388 /* At this point, we're the last thread */
533c011a 389 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 390 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS		 391 MUTEX_DESTROY(&PL_threads_mutex);
392 COND_DESTROY(&PL_nthreads_cond);
b57a092c 393 PL_nthreads--;
0f15f207 394#endif /* !defined(FAKE_THREADS) */
4d1ff10f 395#endif /* USE_5005THREADS */
11343788 396
3280af22 397 destruct_level = PL_perl_destruct_level;
4633a7c4
LW		 398#ifdef DEBUGGING
399 {
400 char *s;
155aba94 401 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc 402 int i = atoi(s);
403 if (destruct_level < i)
404 destruct_level = i;
405 }
4633a7c4
LW		 406 }
407#endif
408
31d77e54
AB		 409
410 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB		 411 dJMPENV;
412 int x = 0;
413
414 JMPENV_PUSH(x);
415 if (PL_endav && !PL_minus_c)
416 call_list(PL_scopestack_ix, PL_endav);
417 JMPENV_POP;
26f423df 418 }
f3faeb53 419 LEAVE;
a0d0e21e
LW		 420 FREETMPS;
421
ff0cee69 422 /* We must account for everything. */
423
424 /* Destroy the main CV and syntax tree */
3280af22
NIS		 425 if (PL_main_root) {
426 PL_curpad = AvARRAY(PL_comppad);
427 op_free(PL_main_root);
428 PL_main_root = Nullop;
a0d0e21e 429 }
3280af22
NIS		 430 PL_curcop = &PL_compiling;
431 PL_main_start = Nullop;
432 SvREFCNT_dec(PL_main_cv);
433 PL_main_cv = Nullcv;
24d3c518 434 PL_dirty = TRUE;
ff0cee69 435
13621cfb
NIS		 436 /* Tell PerlIO we are about to tear things apart in case
437 we have layers which are using resources that should
438 be cleaned up now.
439 */
440
441 PerlIO_destruct(aTHX);
442
3280af22 443 if (PL_sv_objcount) {
a0d0e21e
LW		 444 /*
445 * Try to destruct global references. We do this first so that the
446 * destructors and destructees still exist. Some sv's might remain.
447 * Non-referenced objects are on their own.
448 */
a0d0e21e 449 sv_clean_objs();
8990e307
LW		 450 }
451
5cd24f17 452 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS		 453 SvREFCNT_dec(PL_warnhook);
454 PL_warnhook = Nullsv;
455 SvREFCNT_dec(PL_diehook);
456 PL_diehook = Nullsv;
5cd24f17 457
4b556e6c 458 /* call exit list functions */
3280af22 459 while (PL_exitlistlen-- > 0)
acfe0abc 460 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 461
3280af22 462 Safefree(PL_exitlist);
4b556e6c 463
a0d0e21e 464 if (destruct_level == 0){
8990e307 465
a0d0e21e 466 DEBUG_P(debprofdump());
ac27b0f5 467
56a2bab7
NIS		 468#if defined(PERLIO_LAYERS)
469 /* No more IO - including error messages ! */
470 PerlIO_cleanup(aTHX);
471#endif
472
a0d0e21e 473 /* The exit() function will do everything that needs doing. */
31d77e54 474 return STATUS_NATIVE_EXPORT;;
a0d0e21e 475 }
5dd60ef7 476
551a8b83 477 /* jettison our possibly duplicated environment */
4b647fb0
DM		 478 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
479 * so we certainly shouldn't free it here
480 */
481#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
551a8b83
JH		 482 if (environ != PL_origenviron) {
483 I32 i;
484
485 for (i = 0; environ[i]; i++)
4b420006 486 safesysfree(environ[i]);
0631ea03 487
4b420006
JH		 488 /* Must use safesysfree() when working with environ. */
489 safesysfree(environ);
551a8b83
JH		 490
491 environ = PL_origenviron;
492 }
493#endif
494
5f8cb046
DM		 495#ifdef USE_ITHREADS
496 /* the syntax tree is shared between clones
497 * so op_free(PL_main_root) only ReREFCNT_dec's
498 * REGEXPs in the parent interpreter
499 * we need to manually ReREFCNT_dec for the clones
500 */
501 {
502 I32 i = AvFILLp(PL_regex_padav) + 1;
503 SV **ary = AvARRAY(PL_regex_padav);
504
505 while (i) {
35061a7e 506 SV *resv = ary[--i];
ba89bb6e 507 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM		 508
509 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 510 /* this is PL_reg_curpm, already freed
35061a7e
DM		 511 * flag is set in regexec.c:S_regtry
512 */
513 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 514 }
1cc8b4c5
AB		 515 else if(SvREPADTMP(resv)) {
516 SvREPADTMP_off(resv);
517 }
35061a7e 518 else {
5f8cb046
DM		 519 ReREFCNT_dec(re);
520 }
521 }
522 }
523 SvREFCNT_dec(PL_regex_padav);
524 PL_regex_padav = Nullav;
525 PL_regex_pad = NULL;
526#endif
527
5f05dabc 528 /* loosen bonds of global variables */
529
3280af22
NIS		 530 if(PL_rsfp) {
531 (void)PerlIO_close(PL_rsfp);
532 PL_rsfp = Nullfp;
8ebc5c01 533 }
534
535 /* Filters for program text */
3280af22
NIS		 536 SvREFCNT_dec(PL_rsfp_filters);
537 PL_rsfp_filters = Nullav;
8ebc5c01 538
539 /* switches */
3280af22
NIS		 540 PL_preprocess = FALSE;
541 PL_minus_n = FALSE;
542 PL_minus_p = FALSE;
543 PL_minus_l = FALSE;
544 PL_minus_a = FALSE;
545 PL_minus_F = FALSE;
546 PL_doswitches = FALSE;
599cee73 547 PL_dowarn = G_WARN_OFF;
3280af22
NIS		 548 PL_doextract = FALSE;
549 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS		 550 PL_unsafe = FALSE;
551
552 Safefree(PL_inplace);
553 PL_inplace = Nullch;
a7cb1f99 554 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS		 555
556 if (PL_e_script) {
557 SvREFCNT_dec(PL_e_script);
558 PL_e_script = Nullsv;
8ebc5c01 559 }
560
bc0a45ed
DM		 561 while (--PL_origargc >= 0) {
562 Safefree(PL_origargv[PL_origargc]);
563 }
564 Safefree(PL_origargv);
565
8ebc5c01 566 /* magical thingies */
567
7889fe52
NIS		 568 SvREFCNT_dec(PL_ofs_sv); /* $, */
569 PL_ofs_sv = Nullsv;
5f05dabc 570
7889fe52
NIS		 571 SvREFCNT_dec(PL_ors_sv); /* $\ */
572 PL_ors_sv = Nullsv;
8ebc5c01 573
3280af22
NIS		 574 SvREFCNT_dec(PL_rs); /* $/ */
575 PL_rs = Nullsv;
dc92893f 576
d33b2eba
GS		 577 PL_multiline = 0; /* $* */
578 Safefree(PL_osname); /* $^O */
579 PL_osname = Nullch;
5f05dabc 580
3280af22
NIS		 581 SvREFCNT_dec(PL_statname);
582 PL_statname = Nullsv;
583 PL_statgv = Nullgv;
5f05dabc 584
8ebc5c01 585 /* defgv, aka *_ should be taken care of elsewhere */
586
8ebc5c01 587 /* clean up after study() */
3280af22
NIS		 588 SvREFCNT_dec(PL_lastscream);
589 PL_lastscream = Nullsv;
590 Safefree(PL_screamfirst);
591 PL_screamfirst = 0;
592 Safefree(PL_screamnext);
593 PL_screamnext = 0;
8ebc5c01 594
7d5ea4e7
GS		 595 /* float buffer */
596 Safefree(PL_efloatbuf);
597 PL_efloatbuf = Nullch;
598 PL_efloatsize = 0;
599
8ebc5c01 600 /* startup and shutdown function lists */
3280af22 601 SvREFCNT_dec(PL_beginav);
5a837c8f 602 SvREFCNT_dec(PL_beginav_save);
3280af22 603 SvREFCNT_dec(PL_endav);
7d30b5c4 604 SvREFCNT_dec(PL_checkav);
3280af22
NIS		 605 SvREFCNT_dec(PL_initav);
606 PL_beginav = Nullav;
5a837c8f 607 PL_beginav_save = Nullav;
3280af22 608 PL_endav = Nullav;
7d30b5c4 609 PL_checkav = Nullav;
3280af22 610 PL_initav = Nullav;
5618dfe8 611
8ebc5c01 612 /* shortcuts just get cleared */
3280af22 613 PL_envgv = Nullgv;
3280af22
NIS		 614 PL_incgv = Nullgv;
615 PL_hintgv = Nullgv;
616 PL_errgv = Nullgv;
617 PL_argvgv = Nullgv;
618 PL_argvoutgv = Nullgv;
619 PL_stdingv = Nullgv;
bf49b057 620 PL_stderrgv = Nullgv;
3280af22
NIS		 621 PL_last_in_gv = Nullgv;
622 PL_replgv = Nullgv;
5c831c24 623 PL_debstash = Nullhv;
8ebc5c01 624
625 /* reset so print() ends up where we expect */
626 setdefout(Nullgv);
5c831c24 627
7a1c5554
GS		 628 SvREFCNT_dec(PL_argvout_stack);
629 PL_argvout_stack = Nullav;
8ebc5c01 630
5c831c24
GS		 631 SvREFCNT_dec(PL_modglobal);
632 PL_modglobal = Nullhv;
633 SvREFCNT_dec(PL_preambleav);
634 PL_preambleav = Nullav;
635 SvREFCNT_dec(PL_subname);
636 PL_subname = Nullsv;
637 SvREFCNT_dec(PL_linestr);
638 PL_linestr = Nullsv;
639 SvREFCNT_dec(PL_pidstatus);
640 PL_pidstatus = Nullhv;
641 SvREFCNT_dec(PL_toptarget);
642 PL_toptarget = Nullsv;
643 SvREFCNT_dec(PL_bodytarget);
644 PL_bodytarget = Nullsv;
645 PL_formtarget = Nullsv;
646
d33b2eba 647 /* free locale stuff */
b9582b6a 648#ifdef USE_LOCALE_COLLATE
d33b2eba
GS		 649 Safefree(PL_collation_name);
650 PL_collation_name = Nullch;
b9582b6a 651#endif
d33b2eba 652
b9582b6a 653#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS		 654 Safefree(PL_numeric_name);
655 PL_numeric_name = Nullch;
a453c169 656 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 657#endif
d33b2eba 658
5c831c24
GS		 659 /* clear utf8 character classes */
660 SvREFCNT_dec(PL_utf8_alnum);
661 SvREFCNT_dec(PL_utf8_alnumc);
662 SvREFCNT_dec(PL_utf8_ascii);
663 SvREFCNT_dec(PL_utf8_alpha);
664 SvREFCNT_dec(PL_utf8_space);
665 SvREFCNT_dec(PL_utf8_cntrl);
666 SvREFCNT_dec(PL_utf8_graph);
667 SvREFCNT_dec(PL_utf8_digit);
668 SvREFCNT_dec(PL_utf8_upper);
669 SvREFCNT_dec(PL_utf8_lower);
670 SvREFCNT_dec(PL_utf8_print);
671 SvREFCNT_dec(PL_utf8_punct);
672 SvREFCNT_dec(PL_utf8_xdigit);
673 SvREFCNT_dec(PL_utf8_mark);
674 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 675 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 676 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 677 SvREFCNT_dec(PL_utf8_tofold);
5c831c24
GS		 678 PL_utf8_alnum = Nullsv;
679 PL_utf8_alnumc = Nullsv;
680 PL_utf8_ascii = Nullsv;
681 PL_utf8_alpha = Nullsv;
682 PL_utf8_space = Nullsv;
683 PL_utf8_cntrl = Nullsv;
684 PL_utf8_graph = Nullsv;
685 PL_utf8_digit = Nullsv;
686 PL_utf8_upper = Nullsv;
687 PL_utf8_lower = Nullsv;
688 PL_utf8_print = Nullsv;
689 PL_utf8_punct = Nullsv;
690 PL_utf8_xdigit = Nullsv;
691 PL_utf8_mark = Nullsv;
692 PL_utf8_toupper = Nullsv;
693 PL_utf8_totitle = Nullsv;
694 PL_utf8_tolower = Nullsv;
b4e400f9 695 PL_utf8_tofold = Nullsv;
5c831c24 696
971a9dd3
GS		 697 if (!specialWARN(PL_compiling.cop_warnings))
698 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 699 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS		 700 if (!specialCopIO(PL_compiling.cop_io))
701 SvREFCNT_dec(PL_compiling.cop_io);
702 PL_compiling.cop_io = Nullsv;
f4dd75d9
GS		 703#ifdef USE_ITHREADS
704 Safefree(CopFILE(&PL_compiling));
705 CopFILE(&PL_compiling) = Nullch;
706 Safefree(CopSTASHPV(&PL_compiling));
707#else
01724ea0 708 SvREFCNT_dec(CopFILEGV(&PL_compiling));
f4dd75d9
GS		 709 CopFILEGV(&PL_compiling) = Nullgv;
710 /* cop_stash is not refcounted */
01724ea0 711#endif
5c831c24 712
a0d0e21e 713 /* Prepare to destruct main symbol table. */
5f05dabc 714
3280af22
NIS		 715 hv = PL_defstash;
716 PL_defstash = 0;
a0d0e21e 717 SvREFCNT_dec(hv);
5c831c24
GS		 718 SvREFCNT_dec(PL_curstname);
719 PL_curstname = Nullsv;
a0d0e21e 720
5a844595
GS		 721 /* clear queued errors */
722 SvREFCNT_dec(PL_errors);
723 PL_errors = Nullsv;
724
a0d0e21e 725 FREETMPS;
0453d815 726 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 727 if (PL_scopestack_ix != 0)
0453d815
PM		 728 Perl_warner(aTHX_ WARN_INTERNAL,
729 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS		 730 (long)PL_scopestack_ix);
731 if (PL_savestack_ix != 0)
0453d815
PM		 732 Perl_warner(aTHX_ WARN_INTERNAL,
733 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS		 734 (long)PL_savestack_ix);
735 if (PL_tmps_floor != -1)
0453d815 736 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 737 (long)PL_tmps_floor + 1);
a0d0e21e 738 if (cxstack_ix != -1)
0453d815 739 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 740 (long)cxstack_ix + 1);
a0d0e21e 741 }
8990e307
LW		 742
743 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 744 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 745 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH		 746
747 /* the 2 is for PL_fdpid and PL_strtab */
748 while (PL_sv_count > 2 && sv_clean_all())
749 ;
750
d33b2eba
GS		 751 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
752 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS		 753 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
754 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 755
d4777f27
GS		 756 AvREAL_off(PL_fdpid); /* no surviving entries */
757 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS		 758 PL_fdpid = Nullav;
759
6c644e78
GS		 760#ifdef HAVE_INTERP_INTERN
761 sys_intern_clear();
762#endif
763
6e72f9df 764 /* Destruct the global string table. */
765 {
766 /* Yell and reset the HeVAL() slots that are still holding refcounts,
767 * so that sv_free() won't fail on them.
768 */
769 I32 riter;
770 I32 max;
771 HE *hent;
772 HE **array;
773
774 riter = 0;
3280af22
NIS		 775 max = HvMAX(PL_strtab);
776 array = HvARRAY(PL_strtab);
6e72f9df 777 hent = array[0];
778 for (;;) {
0453d815
PM		 779 if (hent && ckWARN_d(WARN_INTERNAL)) {
780 Perl_warner(aTHX_ WARN_INTERNAL,
781 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df 782 HeVAL(hent) - Nullsv, HeKEY(hent));
783 HeVAL(hent) = Nullsv;
784 hent = HeNEXT(hent);
785 }
786 if (!hent) {
787 if (++riter > max)
788 break;
789 hent = array[riter];
790 }
791 }
792 }
3280af22 793 SvREFCNT_dec(PL_strtab);
6e72f9df 794
e652bb2f 795#ifdef USE_ITHREADS
a0739874
DM		 796 /* free the pointer table used for cloning */
797 ptr_table_free(PL_ptr_table);
53186e96 798#endif
a0739874 799
d33b2eba
GS		 800 /* free special SVs */
801
802 SvREFCNT(&PL_sv_yes) = 0;
803 sv_clear(&PL_sv_yes);
804 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 805 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS		 806
807 SvREFCNT(&PL_sv_no) = 0;
808 sv_clear(&PL_sv_no);
809 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 810 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS		 811
812 SvREFCNT(&PL_sv_undef) = 0;
813 SvREADONLY_off(&PL_sv_undef);
d33b2eba 814
0453d815
PM		 815 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
816 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 817
56a2bab7 818#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS		 819 /* No more IO - including error messages ! */
820 PerlIO_cleanup(aTHX);
821#endif
822
3280af22 823 Safefree(PL_origfilename);
3280af22 824 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ		 825 if (PL_reg_curpm)
826 Safefree(PL_reg_curpm);
82ba1be6 827 Safefree(PL_reg_poscache);
3280af22
NIS		 828 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
829 Safefree(PL_op_mask);
cf36064f
GS		 830 Safefree(PL_psig_ptr);
831 Safefree(PL_psig_name);
2c2666fc 832 Safefree(PL_bitcount);
ce08f86c 833 Safefree(PL_psig_pend);
6e72f9df 834 nuke_stacks();
3280af22 835 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 836
a0d0e21e 837 DEBUG_P(debprofdump());
4d1ff10f 838#ifdef USE_5005THREADS
5f08fbcd 839 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS		 840 MUTEX_DESTROY(&PL_sv_mutex);
841 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 842 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 843 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 844 COND_DESTROY(&PL_eval_cond);
11d617a5
GS		 845#ifdef EMULATE_ATOMIC_REFCOUNTS
846 MUTEX_DESTROY(&PL_svref_mutex);
847#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 848
8023c3ce 849 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS		 850 Safefree(SvPVX(PL_thrsv));
851 Safefree(SvANY(PL_thrsv));
852 Safefree(PL_thrsv);
853 PL_thrsv = Nullsv;
4d1ff10f 854#endif /* USE_5005THREADS */
d33b2eba 855
e5dd39fc
AB		 856#ifdef USE_REENTRANT_API
857 Safefree(PL_reentrant_buffer->tmbuff);
858 Safefree(PL_reentrant_buffer);
859#endif
860
612f20c3
GS		 861 sv_free_arenas();
862
fc36a67e 863 /* As the absolutely last thing, free the non-arena SV for mess() */
864
3280af22 865 if (PL_mess_sv) {
9c63abab
GS		 866 /* it could have accumulated taint magic */
867 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
868 MAGIC* mg;
869 MAGIC* moremagic;
870 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
871 moremagic = mg->mg_moremagic;
14befaf4
DM		 872 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
873 && mg->mg_len >= 0)
9c63abab
GS		 874 Safefree(mg->mg_ptr);
875 Safefree(mg);
876 }
877 }
fc36a67e 878 /* we know that type >= SVt_PV */
155aba94 879 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS		 880 Safefree(SvPVX(PL_mess_sv));
881 Safefree(SvANY(PL_mess_sv));
882 Safefree(PL_mess_sv);
883 PL_mess_sv = Nullsv;
fc36a67e 884 }
31d77e54 885 return STATUS_NATIVE_EXPORT;
79072805
LW		 886}
887
954c1994
GS		 888/*
889=for apidoc perl_free
890
891Releases a Perl interpreter. See L<perlembed>.
892
893=cut
894*/
895
79072805 896void
0cb96387 897perl_free(pTHXx)
79072805 898{
acfe0abc 899#if defined(WIN32) || defined(NETWARE)
ce3e5b80 900# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS		 901# ifdef NETWARE
902 void *host = nw_internal_host;
903# else
904 void *host = w32_internal_host;
905# endif
ce3e5b80 906 PerlMem_free(aTHXx);
acfe0abc
GS		 907# ifdef NETWARE
908 nw5_delete_internal_host(host);
909# else
910 win32_delete_internal_host(host);
911# endif
1c0ca838
GS		 912# else
913 PerlMem_free(aTHXx);
914# endif
acfe0abc
GS		 915#else
916 PerlMem_free(aTHXx);
76e3520e 917#endif
79072805
LW		 918}
919
4b556e6c 920void
864dbfa3 921Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 922{
3280af22
NIS		 923 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
924 PL_exitlist[PL_exitlistlen].fn = fn;
925 PL_exitlist[PL_exitlistlen].ptr = ptr;
926 ++PL_exitlistlen;
4b556e6c
JD		 927}
928
954c1994
GS		 929/*
930=for apidoc perl_parse
931
932Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
933
934=cut
935*/
936
79072805 937int
0cb96387 938perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 939{
6224f72b 940 I32 oldscope;
6224f72b 941 int ret;
db36c5a1 942 dJMPENV;
4d1ff10f 943#ifdef USE_5005THREADS
cea2e8a9
GS		 944 dTHX;
945#endif
8d063cd8 946
a687059c
LW		 947#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
948#ifdef IAMSUID
949#undef IAMSUID
cea2e8a9 950 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW		 951setuid perl scripts securely.\n");
952#endif
953#endif
954
3280af22 955 PL_origargc = argc;
bc0a45ed
DM		 956 {
957 /* we copy rather than point to argv
958 * since perl_clone will copy and perl_destruct
3a1ee7e8 959 * has no way of knowing if we've made a copy or
bc0a45ed
DM		 960 * just point to argv
961 */
962 int i = PL_origargc;
963 New(0, PL_origargv, i+1, char*);
964 PL_origargv[i] = '\0';
965 while (i-- > 0) {
966 PL_origargv[i] = savepv(argv[i]);
967 }
968 }
969
0631ea03 970
a0d0e21e 971
3280af22 972 if (PL_do_undump) {
a0d0e21e
LW		 973
974 /* Come here if running an undumped a.out. */
975
3280af22
NIS		 976 PL_origfilename = savepv(argv[0]);
977 PL_do_undump = FALSE;
a0d0e21e 978 cxstack_ix = -1; /* start label stack again */
748a9306 979 init_ids();
a0d0e21e
LW		 980 init_postdump_symbols(argc,argv,env);
981 return 0;
982 }
983
3280af22
NIS		 984 if (PL_main_root) {
985 PL_curpad = AvARRAY(PL_comppad);
986 op_free(PL_main_root);
987 PL_main_root = Nullop;
ff0cee69 988 }
3280af22
NIS		 989 PL_main_start = Nullop;
990 SvREFCNT_dec(PL_main_cv);
991 PL_main_cv = Nullcv;
79072805 992
3280af22
NIS		 993 time(&PL_basetime);
994 oldscope = PL_scopestack_ix;
599cee73 995 PL_dowarn = G_WARN_OFF;
f86702cc 996
14dd3ad8
GS		 997#ifdef PERL_FLEXIBLE_EXCEPTIONS
998 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
999#else
1000 JMPENV_PUSH(ret);
1001#endif
6224f72b 1002 switch (ret) {
312caa8e 1003 case 0:
14dd3ad8
GS		 1004#ifndef PERL_FLEXIBLE_EXCEPTIONS
1005 parse_body(env,xsinit);
1006#endif
7d30b5c4
GS		 1007 if (PL_checkav)
1008 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 1009 ret = 0;
1010 break;
6224f72b
GS		 1011 case 1:
1012 STATUS_ALL_FAILURE;
1013 /* FALL THROUGH */
1014 case 2:
1015 /* my_exit() was called */
3280af22 1016 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1017 LEAVE;
1018 FREETMPS;
3280af22 1019 PL_curstash = PL_defstash;
7d30b5c4
GS		 1020 if (PL_checkav)
1021 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 1022 ret = STATUS_NATIVE_EXPORT;
1023 break;
6224f72b 1024 case 3:
bf49b057 1025 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS		 1026 ret = 1;
1027 break;
6224f72b 1028 }
14dd3ad8
GS		 1029 JMPENV_POP;
1030 return ret;
1031}
1032
1033#ifdef PERL_FLEXIBLE_EXCEPTIONS
1034STATIC void *
1035S_vparse_body(pTHX_ va_list args)
1036{
1037 char **env = va_arg(args, char**);
1038 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1039
1040 return parse_body(env, xsinit);
312caa8e 1041}
14dd3ad8 1042#endif
312caa8e
CS		 1043
1044STATIC void *
14dd3ad8 1045S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1046{
312caa8e
CS		 1047 int argc = PL_origargc;
1048 char **argv = PL_origargv;
312caa8e
CS		 1049 char *scriptname = NULL;
1050 int fdscript = -1;
1051 VOL bool dosearch = FALSE;
1052 char *validarg = "";
1053 AV* comppadlist;
1054 register SV *sv;
1055 register char *s;
cf756827 1056 char *cddir = Nullch;
312caa8e 1057
3280af22 1058 sv_setpvn(PL_linestr,"",0);
79cb57f6 1059 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS		 1060 SAVEFREESV(sv);
1061 init_main_stash();
54310121 1062
6224f72b
GS		 1063 for (argc--,argv++; argc > 0; argc--,argv++) {
1064 if (argv[0][0] != '-' || !argv[0][1])
1065 break;
1066#ifdef DOSUID
1067 if (*validarg)
1068 validarg = " PHOOEY ";
1069 else
1070 validarg = argv[0];
13281fa4 1071#endif
6224f72b
GS		 1072 s = argv[0]+1;
1073 reswitch:
1074 switch (*s) {
729a02f2
GS		 1075 case 'C':
1076#ifdef WIN32
c0932edc 1077 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS		 1078 /* FALL THROUGH */
1079#endif
1d5472a9
GS		 1080#ifndef PERL_STRICT_CR
1081 case '\r':
1082#endif
6224f72b
GS		 1083 case ' ':
1084 case '0':
1085 case 'F':
1086 case 'a':
1087 case 'c':
1088 case 'd':
1089 case 'D':
1090 case 'h':
1091 case 'i':
1092 case 'l':
1093 case 'M':
1094 case 'm':
1095 case 'n':
1096 case 'p':
1097 case 's':
1098 case 'u':
1099 case 'U':
1100 case 'v':
599cee73
PM		 1101 case 'W':
1102 case 'X':
6224f72b 1103 case 'w':
155aba94 1104 if ((s = moreswitches(s)))
6224f72b
GS		 1105 goto reswitch;
1106 break;
33b78306 1107
6224f72b 1108 case 'T':
3280af22 1109 PL_tainting = TRUE;
6224f72b
GS		 1110 s++;
1111 goto reswitch;
f86702cc 1112
6224f72b 1113 case 'e':
bf4acbe4
GS		 1114#ifdef MACOS_TRADITIONAL
1115 /* ignore -e for Dev:Pseudo argument */
1116 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1117 break;
bf4acbe4 1118#endif
3280af22 1119 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1120 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1121 if (!PL_e_script) {
79cb57f6 1122 PL_e_script = newSVpvn("",0);
0cb96387 1123 filter_add(read_e_script, NULL);
6224f72b
GS		 1124 }
1125 if (*++s)
3280af22 1126 sv_catpv(PL_e_script, s);
6224f72b 1127 else if (argv[1]) {
3280af22 1128 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS		 1129 argc--,argv++;
1130 }
1131 else
cea2e8a9 1132 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1133 sv_catpv(PL_e_script, "\n");
6224f72b 1134 break;
afe37c7d 1135
6224f72b
GS		 1136 case 'I': /* -I handled both here and in moreswitches() */
1137 forbid_setid("-I");
1138 if (!*++s && (s=argv[1]) != Nullch) {
1139 argc--,argv++;
1140 }
6224f72b 1141 if (s && *s) {
0df16ed7
GS		 1142 char *p;
1143 STRLEN len = strlen(s);
1144 p = savepvn(s, len);
9c8a64f0 1145 incpush(p, TRUE, TRUE);
0df16ed7
GS		 1146 sv_catpvn(sv, "-I", 2);
1147 sv_catpvn(sv, p, len);
1148 sv_catpvn(sv, " ", 1);
6224f72b 1149 Safefree(p);
0df16ed7
GS		 1150 }
1151 else
a67e862a 1152 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS		 1153 break;
1154 case 'P':
1155 forbid_setid("-P");
3280af22 1156 PL_preprocess = TRUE;
6224f72b
GS		 1157 s++;
1158 goto reswitch;
1159 case 'S':
1160 forbid_setid("-S");
1161 dosearch = TRUE;
1162 s++;
1163 goto reswitch;
1164 case 'V':
3280af22
NIS		 1165 if (!PL_preambleav)
1166 PL_preambleav = newAV();
1167 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1168 if (*++s != ':') {
3280af22 1169 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1170#ifdef VMS
6b88bc9c 1171 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1172#else
3280af22 1173 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1174#endif
3280af22 1175 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1176# ifdef DEBUGGING
3280af22 1177 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1178# endif
6224f72b 1179# ifdef MULTIPLICITY
8f872242 1180 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1181# endif
4d1ff10f
AB		 1182# ifdef USE_5005THREADS
1183 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1184# endif
ac5e8965
JH		 1185# ifdef USE_ITHREADS
1186 sv_catpv(PL_Sv," USE_ITHREADS");
1187# endif
10cc9d2a
JH		 1188# ifdef USE_64_BIT_INT
1189 sv_catpv(PL_Sv," USE_64_BIT_INT");
1190# endif
1191# ifdef USE_64_BIT_ALL
1192 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH		 1193# endif
1194# ifdef USE_LONG_DOUBLE
1195 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1196# endif
53430762
JH		 1197# ifdef USE_LARGE_FILES
1198 sv_catpv(PL_Sv," USE_LARGE_FILES");
1199# endif
ac5e8965
JH		 1200# ifdef USE_SOCKS
1201 sv_catpv(PL_Sv," USE_SOCKS");
1202# endif
b363f7ed
GS		 1203# ifdef PERL_IMPLICIT_CONTEXT
1204 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1205# endif
1206# ifdef PERL_IMPLICIT_SYS
1207 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1208# endif
3280af22 1209 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1210
6224f72b
GS		 1211#if defined(LOCAL_PATCH_COUNT)
1212 if (LOCAL_PATCH_COUNT > 0) {
1213 int i;
3280af22 1214 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1215 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1216 if (PL_localpatches[i])
cea2e8a9 1217 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS		 1218 }
1219 }
1220#endif
cea2e8a9 1221 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS		 1222#ifdef __DATE__
1223# ifdef __TIME__
cea2e8a9 1224 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1225# else
cea2e8a9 1226 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS		 1227# endif
1228#endif
3280af22 1229 sv_catpv(PL_Sv, "; \
6224f72b 1230$\"=\"\\n \"; \
69fcd688
JH		 1231@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1232#ifdef __CYGWIN__
1233 sv_catpv(PL_Sv,"\
1234push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1235#endif
1236 sv_catpv(PL_Sv, "\
6224f72b
GS		 1237print \" \\%ENV:\\n @env\\n\" if @env; \
1238print \" \\@INC:\\n @INC\\n\";");
1239 }
1240 else {
3280af22
NIS		 1241 PL_Sv = newSVpv("config_vars(qw(",0);
1242 sv_catpv(PL_Sv, ++s);
1243 sv_catpv(PL_Sv, "))");
6224f72b
GS		 1244 s += strlen(s);
1245 }
3280af22 1246 av_push(PL_preambleav, PL_Sv);
6224f72b
GS		 1247 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1248 goto reswitch;
1249 case 'x':
3280af22 1250 PL_doextract = TRUE;
6224f72b
GS		 1251 s++;
1252 if (*s)
f4c556ac 1253 cddir = s;
6224f72b
GS		 1254 break;
1255 case 0:
1256 break;
1257 case '-':
1258 if (!*++s || isSPACE(*s)) {
1259 argc--,argv++;
1260 goto switch_end;
1261 }
1262 /* catch use of gnu style long options */
1263 if (strEQ(s, "version")) {
1264 s = "v";
1265 goto reswitch;
1266 }
1267 if (strEQ(s, "help")) {
1268 s = "h";
1269 goto reswitch;
1270 }
1271 s--;
1272 /* FALL THROUGH */
1273 default:
cea2e8a9 1274 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW		 1275 }
1276 }
6224f72b 1277 switch_end:
54310121 1278
f675dbe5
CB		 1279 if (
1280#ifndef SECURE_INTERNAL_GETENV
1281 !PL_tainting &&
1282#endif
cf756827 1283 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1284 {
cf756827 1285 char *popt = s;
74288ac8
GS		 1286 while (isSPACE(*s))
1287 s++;
1288 if (*s == '-' && *(s+1) == 'T')
1289 PL_tainting = TRUE;
1290 else {
cf756827 1291 char *popt_copy = Nullch;
74288ac8 1292 while (s && *s) {
4ea8f8fb 1293 char *d;
74288ac8
GS		 1294 while (isSPACE(*s))
1295 s++;
1296 if (*s == '-') {
1297 s++;
1298 if (isSPACE(*s))
1299 continue;
1300 }
4ea8f8fb 1301 d = s;
74288ac8
GS		 1302 if (!*s)
1303 break;
1304 if (!strchr("DIMUdmw", *s))
cea2e8a9 1305 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS		 1306 while (++s && *s) {
1307 if (isSPACE(*s)) {
cf756827
GS		 1308 if (!popt_copy) {
1309 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1310 s = popt_copy + (s - popt);
1311 d = popt_copy + (d - popt);
1312 }
4ea8f8fb
MS		 1313 *s++ = '\0';
1314 break;
1315 }
1316 }
1317 moreswitches(d);
6224f72b 1318 }
6224f72b
GS		 1319 }
1320 }
a0d0e21e 1321
6224f72b
GS		 1322 if (!scriptname)
1323 scriptname = argv[0];
3280af22 1324 if (PL_e_script) {
6224f72b
GS		 1325 argc++,argv--;
1326 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1327 }
1328 else if (scriptname == Nullch) {
1329#ifdef MSDOS
1330 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1331 moreswitches("h");
1332#endif
1333 scriptname = "-";
1334 }
1335
1336 init_perllib();
1337
1338 open_script(scriptname,dosearch,sv,&fdscript);
1339
1340 validate_suid(validarg, scriptname,fdscript);
1341
64ca3a65 1342#ifndef PERL_MICRO
0b5b802d
GS		 1343#if defined(SIGCHLD) || defined(SIGCLD)
1344 {
1345#ifndef SIGCHLD
1346# define SIGCHLD SIGCLD
1347#endif
1348 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1349 if (sigstate == SIG_IGN) {
1350 if (ckWARN(WARN_SIGNAL))
1351 Perl_warner(aTHX_ WARN_SIGNAL,
1352 "Can't ignore signal CHLD, forcing to default");
1353 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1354 }
1355 }
1356#endif
64ca3a65 1357#endif
0b5b802d 1358
bf4acbe4
GS		 1359#ifdef MACOS_TRADITIONAL
1360 if (PL_doextract || gMacPerl_AlwaysExtract) {
1361#else
f4c556ac 1362 if (PL_doextract) {
bf4acbe4 1363#endif
6224f72b 1364 find_beginning();
f4c556ac
GS		 1365 if (cddir && PerlDir_chdir(cddir) < 0)
1366 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1367
1368 }
6224f72b 1369
3280af22
NIS		 1370 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1371 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1372 CvUNIQUE_on(PL_compcv);
1373
1374 PL_comppad = newAV();
1375 av_push(PL_comppad, Nullsv);
1376 PL_curpad = AvARRAY(PL_comppad);
1377 PL_comppad_name = newAV();
1378 PL_comppad_name_fill = 0;
1379 PL_min_intro_pending = 0;
1380 PL_padix = 0;
4d1ff10f 1381#ifdef USE_5005THREADS
79cb57f6 1382 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS		 1383 PL_curpad[0] = (SV*)newAV();
1384 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1385 CvOWNER(PL_compcv) = 0;
1386 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1387 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1388#endif /* USE_5005THREADS */
6224f72b
GS		 1389
1390 comppadlist = newAV();
1391 AvREAL_off(comppadlist);
3280af22
NIS		 1392 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1393 av_store(comppadlist, 1, (SV*)PL_comppad);
1394 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1395
0c4f7ff0 1396 boot_core_PerlIO();
6224f72b 1397 boot_core_UNIVERSAL();
9a34ef1d 1398#ifndef PERL_MICRO
09bef843 1399 boot_core_xsutils();
9a34ef1d 1400#endif
6224f72b
GS		 1401
1402 if (xsinit)
acfe0abc 1403 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1404#ifndef PERL_MICRO
ed79a026 1405#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1406 init_os_extras();
6224f72b 1407#endif
64ca3a65 1408#endif
6224f72b 1409
29209bc5 1410#ifdef USE_SOCKS
1b9c9cf5
DH		 1411# ifdef HAS_SOCKS5_INIT
1412 socks5_init(argv[0]);
1413# else
29209bc5 1414 SOCKSinit(argv[0]);
1b9c9cf5 1415# endif
ac27b0f5 1416#endif
29209bc5 1417
6224f72b
GS		 1418 init_predump_symbols();
1419 /* init_postdump_symbols not currently designed to be called */
1420 /* more than once (ENV isn't cleared first, for example) */
1421 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1422 if (!PL_do_undump)
6224f72b
GS		 1423 init_postdump_symbols(argc,argv,env);
1424
1425 init_lexer();
1426
1427 /* now parse the script */
1428
91487cfc 1429 SETERRNO(0,SS$_NORMAL);
3280af22 1430 PL_error_count = 0;
bf4acbe4
GS		 1431#ifdef MACOS_TRADITIONAL
1432 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1433 if (PL_minus_c)
1434 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1435 else {
1436 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1437 MacPerl_MPWFileName(PL_origfilename));
1438 }
1439 }
1440#else
3280af22
NIS		 1441 if (yyparse() || PL_error_count) {
1442 if (PL_minus_c)
cea2e8a9 1443 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1444 else {
cea2e8a9 1445 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1446 PL_origfilename);
6224f72b
GS		 1447 }
1448 }
bf4acbe4 1449#endif
57843af0 1450 CopLINE_set(PL_curcop, 0);
3280af22
NIS		 1451 PL_curstash = PL_defstash;
1452 PL_preprocess = FALSE;
1453 if (PL_e_script) {
1454 SvREFCNT_dec(PL_e_script);
1455 PL_e_script = Nullsv;
6224f72b
GS		 1456 }
1457
8bfdd7d9
HS		 1458/*
1459 Not sure that this is still the right place to do this now that we
1460 no longer use PL_nrs. HVDS 2001/09/09
1461*/
864dbfa3 1462 sv_setsv(get_sv("/", TRUE), PL_rs);
8bfdd7d9 1463
3280af22 1464 if (PL_do_undump)
6224f72b
GS		 1465 my_unexec();
1466
57843af0
GS		 1467 if (isWARN_ONCE) {
1468 SAVECOPFILE(PL_curcop);
1469 SAVECOPLINE(PL_curcop);
3280af22 1470 gv_check(PL_defstash);
57843af0 1471 }
6224f72b
GS		 1472
1473 LEAVE;
1474 FREETMPS;
1475
1476#ifdef MYMALLOC
1477 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1478 dump_mstats("after compilation:");
1479#endif
1480
1481 ENTER;
3280af22 1482 PL_restartop = 0;
312caa8e 1483 return NULL;
6224f72b
GS		 1484}
1485
954c1994
GS		 1486/*
1487=for apidoc perl_run
1488
1489Tells a Perl interpreter to run. See L<perlembed>.
1490
1491=cut
1492*/
1493
6224f72b 1494int
0cb96387 1495perl_run(pTHXx)
6224f72b 1496{
6224f72b 1497 I32 oldscope;
14dd3ad8 1498 int ret = 0;
db36c5a1 1499 dJMPENV;
4d1ff10f 1500#ifdef USE_5005THREADS
cea2e8a9
GS		 1501 dTHX;
1502#endif
6224f72b 1503
3280af22 1504 oldscope = PL_scopestack_ix;
96e176bf
CL		 1505#ifdef VMS
1506 VMSISH_HUSHED = 0;
1507#endif
6224f72b 1508
14dd3ad8 1509#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1510 redo_body:
14dd3ad8
GS		 1511 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1512#else
1513 JMPENV_PUSH(ret);
1514#endif
6224f72b
GS		 1515 switch (ret) {
1516 case 1:
1517 cxstack_ix = -1; /* start context stack again */
312caa8e 1518 goto redo_body;
14dd3ad8
GS		 1519 case 0: /* normal completion */
1520#ifndef PERL_FLEXIBLE_EXCEPTIONS
1521 redo_body:
1522 run_body(oldscope);
1523#endif
1524 /* FALL THROUGH */
1525 case 2: /* my_exit() */
3280af22 1526 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1527 LEAVE;
1528 FREETMPS;
3280af22 1529 PL_curstash = PL_defstash;
3a1ee7e8 1530 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB		 1531 PL_endav && !PL_minus_c)
1532 call_list(oldscope, PL_endav);
6224f72b
GS		 1533#ifdef MYMALLOC
1534 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1535 dump_mstats("after execution: ");
1536#endif
14dd3ad8
GS		 1537 ret = STATUS_NATIVE_EXPORT;
1538 break;
6224f72b 1539 case 3:
312caa8e
CS		 1540 if (PL_restartop) {
1541 POPSTACK_TO(PL_mainstack);
1542 goto redo_body;
6224f72b 1543 }
bf49b057 1544 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1545 FREETMPS;
14dd3ad8
GS		 1546 ret = 1;
1547 break;
6224f72b
GS		 1548 }
1549
14dd3ad8
GS		 1550 JMPENV_POP;
1551 return ret;
312caa8e
CS		 1552}
1553
14dd3ad8 1554#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1555STATIC void *
14dd3ad8 1556S_vrun_body(pTHX_ va_list args)
312caa8e 1557{
312caa8e
CS		 1558 I32 oldscope = va_arg(args, I32);
1559
14dd3ad8
GS		 1560 return run_body(oldscope);
1561}
1562#endif
1563
1564
1565STATIC void *
1566S_run_body(pTHX_ I32 oldscope)
1567{
6224f72b 1568 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1569 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1570
3280af22 1571 if (!PL_restartop) {
6224f72b
GS		 1572 DEBUG_x(dump_all());
1573 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH		 1574 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1575 PTR2UV(thr)));
6224f72b 1576
3280af22 1577 if (PL_minus_c) {
bf4acbe4 1578#ifdef MACOS_TRADITIONAL
be708cc0 1579 PerlIO_printf(Perl_error_log, "# %s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1580#else
bf49b057 1581 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1582#endif
6224f72b
GS		 1583 my_exit(0);
1584 }
3280af22 1585 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1586 sv_setiv(PL_DBsingle, 1);
3280af22
NIS		 1587 if (PL_initav)
1588 call_list(oldscope, PL_initav);
6224f72b
GS		 1589 }
1590
1591 /* do it */
1592
3280af22 1593 if (PL_restartop) {
533c011a 1594 PL_op = PL_restartop;
3280af22 1595 PL_restartop = 0;
cea2e8a9 1596 CALLRUNOPS(aTHX);
6224f72b 1597 }
3280af22
NIS		 1598 else if (PL_main_start) {
1599 CvDEPTH(PL_main_cv) = 1;
533c011a 1600 PL_op = PL_main_start;
cea2e8a9 1601 CALLRUNOPS(aTHX);
6224f72b
GS		 1602 }
1603
f6b3007c
JH		 1604 my_exit(0);
1605 /* NOTREACHED */
312caa8e 1606 return NULL;
6224f72b
GS		 1607}
1608
954c1994
GS		 1609/*
1610=for apidoc p||get_sv
1611
1612Returns the SV of the specified Perl scalar. If C<create> is set and the
1613Perl variable does not exist then it will be created. If C<create> is not
1614set and the variable does not exist then NULL is returned.
1615
1616=cut
1617*/
1618
6224f72b 1619SV*
864dbfa3 1620Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS		 1621{
1622 GV *gv;
4d1ff10f 1623#ifdef USE_5005THREADS
6224f72b
GS		 1624 if (name[1] == '\0' && !isALPHA(name[0])) {
1625 PADOFFSET tmp = find_threadsv(name);
411caa50 1626 if (tmp != NOT_IN_PAD)
6224f72b 1627 return THREADSV(tmp);
6224f72b 1628 }
4d1ff10f 1629#endif /* USE_5005THREADS */
6224f72b
GS		 1630 gv = gv_fetchpv(name, create, SVt_PV);
1631 if (gv)
1632 return GvSV(gv);
1633 return Nullsv;
1634}
1635
954c1994
GS		 1636/*
1637=for apidoc p||get_av
1638
1639Returns the AV of the specified Perl array. If C<create> is set and the
1640Perl variable does not exist then it will be created. If C<create> is not
1641set and the variable does not exist then NULL is returned.
1642
1643=cut
1644*/
1645
6224f72b 1646AV*
864dbfa3 1647Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS		 1648{
1649 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1650 if (create)
1651 return GvAVn(gv);
1652 if (gv)
1653 return GvAV(gv);
1654 return Nullav;
1655}
1656
954c1994
GS		 1657/*
1658=for apidoc p||get_hv
1659
1660Returns the HV of the specified Perl hash. If C<create> is set and the
1661Perl variable does not exist then it will be created. If C<create> is not
1662set and the variable does not exist then NULL is returned.
1663
1664=cut
1665*/
1666
6224f72b 1667HV*
864dbfa3 1668Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1669{
a0d0e21e
LW		 1670 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1671 if (create)
1672 return GvHVn(gv);
1673 if (gv)
1674 return GvHV(gv);
1675 return Nullhv;
1676}
1677
954c1994
GS		 1678/*
1679=for apidoc p||get_cv
1680
1681Returns the CV of the specified Perl subroutine. If C<create> is set and
1682the Perl subroutine does not exist then it will be declared (which has the
1683same effect as saying C<sub name;>). If C<create> is not set and the
1684subroutine does not exist then NULL is returned.
1685
1686=cut
1687*/
1688
a0d0e21e 1689CV*
864dbfa3 1690Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW		 1691{
1692 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1693 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS		 1694 /* XXX this is probably not what they think they're getting.
1695 * It has the same effect as "sub name;", i.e. just a forward
1696 * declaration! */
8ebc5c01 1697 if (create && !GvCVu(gv))
774d564b 1698 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1699 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1700 Nullop,
a0d0e21e
LW		 1701 Nullop);
1702 if (gv)
8ebc5c01 1703 return GvCVu(gv);
a0d0e21e
LW		 1704 return Nullcv;
1705}
1706
79072805
LW		 1707/* Be sure to refetch the stack pointer after calling these routines. */
1708
954c1994
GS		 1709/*
1710=for apidoc p||call_argv
1711
1712Performs a callback to the specified Perl sub. See L<perlcall>.
1713
1714=cut
1715*/
1716
a0d0e21e 1717I32
864dbfa3 1718Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1719
8ac85365
NIS		 1720 /* See G_* flags in cop.h */
1721 /* null terminated arg list */
8990e307 1722{
a0d0e21e 1723 dSP;
8990e307 1724
924508f0 1725 PUSHMARK(SP);
a0d0e21e 1726 if (argv) {
8990e307 1727 while (*argv) {
a0d0e21e 1728 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW		 1729 argv++;
1730 }
a0d0e21e 1731 PUTBACK;
8990e307 1732 }
864dbfa3 1733 return call_pv(sub_name, flags);
8990e307
LW		 1734}
1735
954c1994
GS		 1736/*
1737=for apidoc p||call_pv
1738
1739Performs a callback to the specified Perl sub. See L<perlcall>.
1740
1741=cut
1742*/
1743
a0d0e21e 1744I32
864dbfa3 1745Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS		 1746 /* name of the subroutine */
1747 /* See G_* flags in cop.h */
a0d0e21e 1748{
864dbfa3 1749 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW		 1750}
1751
954c1994
GS		 1752/*
1753=for apidoc p||call_method
1754
1755Performs a callback to the specified Perl method. The blessed object must
1756be on the stack. See L<perlcall>.
1757
1758=cut
1759*/
1760
a0d0e21e 1761I32
864dbfa3 1762Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS		 1763 /* name of the subroutine */
1764 /* See G_* flags in cop.h */
a0d0e21e 1765{
968b3946 1766 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW		 1767}
1768
1769/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS		 1770/*
1771=for apidoc p||call_sv
1772
1773Performs a callback to the Perl sub whose name is in the SV. See
1774L<perlcall>.
1775
1776=cut
1777*/
1778
a0d0e21e 1779I32
864dbfa3 1780Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1781 /* See G_* flags in cop.h */
a0d0e21e 1782{
924508f0 1783 dSP;
a0d0e21e 1784 LOGOP myop; /* fake syntax tree node */
968b3946 1785 UNOP method_op;
aa689395 1786 I32 oldmark;
13689cfe 1787 volatile I32 retval = 0;
a0d0e21e 1788 I32 oldscope;
54310121 1789 bool oldcatch = CATCH_GET;
6224f72b 1790 int ret;
533c011a 1791 OP* oldop = PL_op;
db36c5a1 1792 dJMPENV;
1e422769 1793
a0d0e21e
LW		 1794 if (flags & G_DISCARD) {
1795 ENTER;
1796 SAVETMPS;
1797 }
1798
aa689395 1799 Zero(&myop, 1, LOGOP);
54310121 1800 myop.op_next = Nullop;
f51d4af5 1801 if (!(flags & G_NOARGS))
aa689395 1802 myop.op_flags |= OPf_STACKED;
54310121 1803 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1804 (flags & G_ARRAY) ? OPf_WANT_LIST :
1805 OPf_WANT_SCALAR);
462e5cf6 1806 SAVEOP();
533c011a 1807 PL_op = (OP*)&myop;
aa689395 1808
3280af22
NIS		 1809 EXTEND(PL_stack_sp, 1);
1810 *++PL_stack_sp = sv;
aa689395 1811 oldmark = TOPMARK;
3280af22 1812 oldscope = PL_scopestack_ix;
a0d0e21e 1813
3280af22 1814 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1815 /* Handle first BEGIN of -d. */
3280af22 1816 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24 1817 /* Try harder, since this may have been a sighandler, thus
1818 * curstash may be meaningless. */
3280af22 1819 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1820 && !(flags & G_NODEBUG))
533c011a 1821 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1822
968b3946
GS		 1823 if (flags & G_METHOD) {
1824 Zero(&method_op, 1, UNOP);
1825 method_op.op_next = PL_op;
1826 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1827 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1828 PL_op = (OP*)&method_op;
968b3946
GS		 1829 }
1830
312caa8e 1831 if (!(flags & G_EVAL)) {
0cdb2077 1832 CATCH_SET(TRUE);
14dd3ad8 1833 call_body((OP*)&myop, FALSE);
312caa8e 1834 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1835 CATCH_SET(oldcatch);
312caa8e
CS		 1836 }
1837 else {
d78bda3d 1838 myop.op_other = (OP*)&myop;
3280af22 1839 PL_markstack_ptr--;
4633a7c4
LW		 1840 /* we're trying to emulate pp_entertry() here */
1841 {
c09156bb 1842 register PERL_CONTEXT *cx;
54310121 1843 I32 gimme = GIMME_V;
ac27b0f5 1844
4633a7c4
LW		 1845 ENTER;
1846 SAVETMPS;
ac27b0f5 1847
968b3946 1848 push_return(Nullop);
1d76a5c3 1849 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1850 PUSHEVAL(cx, 0, 0);
533c011a 1851 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1852
faef0170 1853 PL_in_eval = EVAL_INEVAL;
4633a7c4 1854 if (flags & G_KEEPERR)
faef0170 1855 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1856 else
38a03e6e 1857 sv_setpv(ERRSV,"");
4633a7c4 1858 }
3280af22 1859 PL_markstack_ptr++;
a0d0e21e 1860
14dd3ad8
GS		 1861#ifdef PERL_FLEXIBLE_EXCEPTIONS
1862 redo_body:
1863 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1864 (OP*)&myop, FALSE);
14dd3ad8
GS		 1865#else
1866 JMPENV_PUSH(ret);
1867#endif
6224f72b
GS		 1868 switch (ret) {
1869 case 0:
14dd3ad8
GS		 1870#ifndef PERL_FLEXIBLE_EXCEPTIONS
1871 redo_body:
1872 call_body((OP*)&myop, FALSE);
1873#endif
312caa8e
CS		 1874 retval = PL_stack_sp - (PL_stack_base + oldmark);
1875 if (!(flags & G_KEEPERR))
1876 sv_setpv(ERRSV,"");
a0d0e21e 1877 break;
6224f72b 1878 case 1:
f86702cc 1879 STATUS_ALL_FAILURE;
a0d0e21e 1880 /* FALL THROUGH */
6224f72b 1881 case 2:
a0d0e21e 1882 /* my_exit() was called */
3280af22 1883 PL_curstash = PL_defstash;
a0d0e21e 1884 FREETMPS;
14dd3ad8 1885 JMPENV_POP;
cc3604b1 1886 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1887 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1888 my_exit_jump();
a0d0e21e 1889 /* NOTREACHED */
6224f72b 1890 case 3:
3280af22 1891 if (PL_restartop) {
533c011a 1892 PL_op = PL_restartop;
3280af22 1893 PL_restartop = 0;
312caa8e 1894 goto redo_body;
a0d0e21e 1895 }
3280af22 1896 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1897 if (flags & G_ARRAY)
1898 retval = 0;
1899 else {
1900 retval = 1;
3280af22 1901 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1902 }
312caa8e 1903 break;
a0d0e21e 1904 }
a0d0e21e 1905
3280af22 1906 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW		 1907 SV **newsp;
1908 PMOP *newpm;
1909 I32 gimme;
c09156bb 1910 register PERL_CONTEXT *cx;
a0a2876f
LW		 1911 I32 optype;
1912
1913 POPBLOCK(cx,newpm);
1914 POPEVAL(cx);
1915 pop_return();
3280af22 1916 PL_curpm = newpm;
a0a2876f 1917 LEAVE;
a0d0e21e 1918 }
14dd3ad8 1919 JMPENV_POP;
a0d0e21e 1920 }
1e422769 1921
a0d0e21e 1922 if (flags & G_DISCARD) {
3280af22 1923 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1924 retval = 0;
1925 FREETMPS;
1926 LEAVE;
1927 }
533c011a 1928 PL_op = oldop;
a0d0e21e
LW		 1929 return retval;
1930}
1931
14dd3ad8 1932#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1933STATIC void *
14dd3ad8 1934S_vcall_body(pTHX_ va_list args)
312caa8e
CS		 1935{
1936 OP *myop = va_arg(args, OP*);
1937 int is_eval = va_arg(args, int);
1938
14dd3ad8 1939 call_body(myop, is_eval);
312caa8e
CS		 1940 return NULL;
1941}
14dd3ad8 1942#endif
312caa8e
CS		 1943
1944STATIC void
14dd3ad8 1945S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1946{
312caa8e
CS		 1947 if (PL_op == myop) {
1948 if (is_eval)
f807eda9 1949 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1950 else
f807eda9 1951 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS		 1952 }
1953 if (PL_op)
cea2e8a9 1954 CALLRUNOPS(aTHX);
312caa8e
CS		 1955}
1956
6e72f9df 1957/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1958
954c1994
GS		 1959/*
1960=for apidoc p||eval_sv
1961
1962Tells Perl to C<eval> the string in the SV.
1963
1964=cut
1965*/
1966
a0d0e21e 1967I32
864dbfa3 1968Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1969
8ac85365 1970 /* See G_* flags in cop.h */
a0d0e21e 1971{
924508f0 1972 dSP;
a0d0e21e 1973 UNOP myop; /* fake syntax tree node */
8fa7f367 1974 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1975 volatile I32 retval = 0;
4633a7c4 1976 I32 oldscope;
6224f72b 1977 int ret;
533c011a 1978 OP* oldop = PL_op;
db36c5a1 1979 dJMPENV;
84902520 1980
4633a7c4
LW		 1981 if (flags & G_DISCARD) {
1982 ENTER;
1983 SAVETMPS;
1984 }
1985
462e5cf6 1986 SAVEOP();
533c011a
NIS		 1987 PL_op = (OP*)&myop;
1988 Zero(PL_op, 1, UNOP);
3280af22
NIS		 1989 EXTEND(PL_stack_sp, 1);
1990 *++PL_stack_sp = sv;
1991 oldscope = PL_scopestack_ix;
79072805 1992
4633a7c4
LW		 1993 if (!(flags & G_NOARGS))
1994 myop.op_flags = OPf_STACKED;
79072805 1995 myop.op_next = Nullop;
6e72f9df 1996 myop.op_type = OP_ENTEREVAL;
54310121 1997 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1998 (flags & G_ARRAY) ? OPf_WANT_LIST :
1999 OPf_WANT_SCALAR);
6e72f9df 2000 if (flags & G_KEEPERR)
2001 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2002
14dd3ad8 2003#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2004 redo_body:
14dd3ad8 2005 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2006 (OP*)&myop, TRUE);
14dd3ad8
GS		 2007#else
2008 JMPENV_PUSH(ret);
2009#endif
6224f72b
GS		 2010 switch (ret) {
2011 case 0:
14dd3ad8
GS		 2012#ifndef PERL_FLEXIBLE_EXCEPTIONS
2013 redo_body:
2014 call_body((OP*)&myop,TRUE);
2015#endif
312caa8e
CS		 2016 retval = PL_stack_sp - (PL_stack_base + oldmark);
2017 if (!(flags & G_KEEPERR))
2018 sv_setpv(ERRSV,"");
4633a7c4 2019 break;
6224f72b 2020 case 1:
f86702cc 2021 STATUS_ALL_FAILURE;
4633a7c4 2022 /* FALL THROUGH */
6224f72b 2023 case 2:
4633a7c4 2024 /* my_exit() was called */
3280af22 2025 PL_curstash = PL_defstash;
4633a7c4 2026 FREETMPS;
14dd3ad8 2027 JMPENV_POP;
cc3604b1 2028 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2029 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2030 my_exit_jump();
4633a7c4 2031 /* NOTREACHED */
6224f72b 2032 case 3:
3280af22 2033 if (PL_restartop) {
533c011a 2034 PL_op = PL_restartop;
3280af22 2035 PL_restartop = 0;
312caa8e 2036 goto redo_body;
4633a7c4 2037 }
3280af22 2038 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2039 if (flags & G_ARRAY)
2040 retval = 0;
2041 else {
2042 retval = 1;
3280af22 2043 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2044 }
312caa8e 2045 break;
4633a7c4
LW		 2046 }
2047
14dd3ad8 2048 JMPENV_POP;
4633a7c4 2049 if (flags & G_DISCARD) {
3280af22 2050 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2051 retval = 0;
2052 FREETMPS;
2053 LEAVE;
2054 }
533c011a 2055 PL_op = oldop;
4633a7c4
LW		 2056 return retval;
2057}
2058
954c1994
GS		 2059/*
2060=for apidoc p||eval_pv
2061
2062Tells Perl to C<eval> the given string and return an SV* result.
2063
2064=cut
2065*/
2066
137443ea 2067SV*
864dbfa3 2068Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 2069{
2070 dSP;
2071 SV* sv = newSVpv(p, 0);
2072
864dbfa3 2073 eval_sv(sv, G_SCALAR);
137443ea 2074 SvREFCNT_dec(sv);
2075
2076 SPAGAIN;
2077 sv = POPs;
2078 PUTBACK;
2079
2d8e6c8d
GS		 2080 if (croak_on_error && SvTRUE(ERRSV)) {
2081 STRLEN n_a;
cea2e8a9 2082 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2083 }
137443ea 2084
2085 return sv;
2086}
2087
4633a7c4
LW		 2088/* Require a module. */
2089
954c1994
GS		 2090/*
2091=for apidoc p||require_pv
2092
7d3fb230
BS		 2093Tells Perl to C<require> the file named by the string argument. It is
2094analogous to the Perl code C<eval "require '$file'">. It's even
2095implemented that way; consider using Perl_load_module instead.
954c1994 2096
7d3fb230 2097=cut */
954c1994 2098
4633a7c4 2099void
864dbfa3 2100Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2101{
d3acc0f7
JP		 2102 SV* sv;
2103 dSP;
e788e7d3 2104 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP		 2105 PUTBACK;
2106 sv = sv_newmortal();
4633a7c4
LW		 2107 sv_setpv(sv, "require '");
2108 sv_catpv(sv, pv);
2109 sv_catpv(sv, "'");
864dbfa3 2110 eval_sv(sv, G_DISCARD);
d3acc0f7
JP		 2111 SPAGAIN;
2112 POPSTACK;
79072805
LW		 2113}
2114
79072805 2115void
864dbfa3 2116Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW		 2117{
2118 register GV *gv;
2119
155aba94 2120 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2121 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW		 2122}
2123
76e3520e 2124STATIC void
cea2e8a9 2125S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2126{
ab821d7f 2127 /* This message really ought to be max 23 lines.
75c72d73 2128 * Removed -h because the user already knows that option. Others? */
fb73857a 2129
76e3520e 2130 static char *usage_msg[] = {
fb73857a 2131"-0[octal] specify record separator (\\0, if no argument)",
2132"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2133"-C enable native wide character system interfaces",
1950ee41 2134"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS		 2135"-d[:debugger] run program under debugger",
2136"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2137"-e 'command' one line of program (several -e's allowed, omit programfile)",
2138"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2139"-i[extension] edit <> files in place (makes backup if extension supplied)",
2140"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2141"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS		 2142"-[mM][-]module execute `use/no module...' before executing program",
2143"-n assume 'while (<>) { ... }' loop around program",
2144"-p assume loop like -n but print line also, like sed",
2145"-P run program through C preprocessor before compilation",
2146"-s enable rudimentary parsing for switches after programfile",
2147"-S look for programfile using PATH environment variable",
2148"-T enable tainting checks",
2149"-u dump core after parsing program",
fb73857a 2150"-U allow unsafe operations",
aac3bd0d
GS		 2151"-v print version, subversion (includes VERY IMPORTANT perl info)",
2152"-V[:variable] print configuration summary (or a single Config.pm variable)",
2153"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS		 2154"-W enable all warnings",
2155"-X disable all warnings",
fb73857a 2156"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2157"\n",
2158NULL
2159};
76e3520e 2160 char **p = usage_msg;
fb73857a 2161
b0e47665
GS		 2162 PerlIO_printf(PerlIO_stdout(),
2163 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2164 name);
fb73857a 2165 while (*p)
b0e47665 2166 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW		 2167}
2168
79072805
LW		 2169/* This routine handles any switches that can be given during run */
2170
2171char *
864dbfa3 2172Perl_moreswitches(pTHX_ char *s)
79072805 2173{
ba210ebe 2174 STRLEN numlen;
c07a80fd 2175 U32 rschar;
79072805
LW		 2176
2177 switch (*s) {
2178 case '0':
a863c7d1 2179 {
53305cf1
NC		 2180 I32 flags = 0;
2181 numlen = 4;
2182 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
8bfdd7d9 2183 SvREFCNT_dec(PL_rs);
c07a80fd 2184 if (rschar & ~((U8)~0))
8bfdd7d9 2185 PL_rs = &PL_sv_undef;
c07a80fd 2186 else if (!rschar && numlen >= 2)
8bfdd7d9 2187 PL_rs = newSVpvn("", 0);
c07a80fd 2188 else {
2189 char ch = rschar;
8bfdd7d9 2190 PL_rs = newSVpvn(&ch, 1);
79072805
LW		 2191 }
2192 return s + numlen;
a863c7d1 2193 }
46487f74
GS		 2194 case 'C':
2195 PL_widesyscalls = TRUE;
2196 s++;
2197 return s;
2304df62 2198 case 'F':
3280af22 2199 PL_minus_F = TRUE;
ebce5377
RGS		 2200 PL_splitstr = ++s;
2201 while (*s && !isSPACE(*s)) ++s;
2202 *s = '\0';
2203 PL_splitstr = savepv(PL_splitstr);
2304df62 2204 return s;
79072805 2205 case 'a':
3280af22 2206 PL_minus_a = TRUE;
79072805
LW		 2207 s++;
2208 return s;
2209 case 'c':
3280af22 2210 PL_minus_c = TRUE;
79072805
LW		 2211 s++;
2212 return s;
2213 case 'd':
bbce6d69 2214 forbid_setid("-d");
4633a7c4 2215 s++;
70c94a19
RR		 2216 /* The following permits -d:Mod to accepts arguments following an =
2217 in the fashion that -MSome::Mod does. */
2218 if (*s == ':' || *s == '=') {
2219 char *start;
2220 SV *sv;
2221 sv = newSVpv("use Devel::", 0);
2222 start = ++s;
2223 /* We now allow -d:Module=Foo,Bar */
2224 while(isALNUM(*s) || *s==':') ++s;
2225 if (*s != '=')
2226 sv_catpv(sv, start);
2227 else {
2228 sv_catpvn(sv, start, s-start);
2229 sv_catpv(sv, " split(/,/,q{");
2230 sv_catpv(sv, ++s);
2231 sv_catpv(sv, "})");
2232 }
4633a7c4 2233 s += strlen(s);
70c94a19 2234 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2235 }
ed094faf 2236 if (!PL_perldb) {
3280af22 2237 PL_perldb = PERLDB_ALL;
a0d0e21e 2238 init_debugger();
ed094faf 2239 }
79072805
LW		 2240 return s;
2241 case 'D':
0453d815 2242 {
79072805 2243#ifdef DEBUGGING
bbce6d69 2244 forbid_setid("-D");
79072805 2245 if (isALPHA(s[1])) {
04932ac8
DM		 2246 /* if adding extra options, remember to update DEBUG_MASK */
2247 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW		 2248 char *d;
2249
93a17b20 2250 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2251 PL_debug |= 1 << (d - debopts);
79072805
LW		 2252 }
2253 else {
3280af22 2254 PL_debug = atoi(s+1);
79072805
LW		 2255 for (s++; isDIGIT(*s); s++) ;
2256 }
aea4f609 2257 PL_debug |= DEBUG_TOP_FLAG;
79072805 2258#else
0453d815
PM		 2259 if (ckWARN_d(WARN_DEBUGGING))
2260 Perl_warner(aTHX_ WARN_DEBUGGING,
2261 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2262 for (s++; isALNUM(*s); s++) ;
79072805
LW		 2263#endif
2264 /*SUPPRESS 530*/
2265 return s;
0453d815 2266 }
4633a7c4 2267 case 'h':
ac27b0f5 2268 usage(PL_origargv[0]);
6ad3d225 2269 PerlProc_exit(0);
79072805 2270 case 'i':
3280af22
NIS		 2271 if (PL_inplace)
2272 Safefree(PL_inplace);
2273 PL_inplace = savepv(s+1);
79072805 2274 /*SUPPRESS 530*/
3280af22 2275 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2276 if (*s) {
fb73857a 2277 *s++ = '\0';
7b8d334a
GS		 2278 if (*s == '-') /* Additional switches on #! line. */
2279 s++;
2280 }
fb73857a 2281 return s;
4e49a025 2282 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2283 forbid_setid("-I");
fb73857a 2284 ++s;
2285 while (*s && isSPACE(*s))
2286 ++s;
2287 if (*s) {
774d564b 2288 char *e, *p;
0df16ed7
GS		 2289 p = s;
2290 /* ignore trailing spaces (possibly followed by other switches) */
2291 do {
2292 for (e = p; *e && !isSPACE(*e); e++) ;
2293 p = e;
2294 while (isSPACE(*p))
2295 p++;
2296 } while (*p && *p != '-');
2297 e = savepvn(s, e-s);
9c8a64f0 2298 incpush(e, TRUE, TRUE);
0df16ed7
GS		 2299 Safefree(e);
2300 s = p;
2301 if (*s == '-')
2302 s++;
79072805
LW		 2303 }
2304 else
a67e862a 2305 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2306 return s;
79072805 2307 case 'l':
3280af22 2308 PL_minus_l = TRUE;
79072805 2309 s++;
7889fe52
NIS		 2310 if (PL_ors_sv) {
2311 SvREFCNT_dec(PL_ors_sv);
2312 PL_ors_sv = Nullsv;
2313 }
79072805 2314 if (isDIGIT(*s)) {
53305cf1 2315 I32 flags = 0;
7889fe52 2316 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC		 2317 numlen = 3 + (*s == '0');
2318 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW		 2319 s += numlen;
2320 }
2321 else {
8bfdd7d9 2322 if (RsPARA(PL_rs)) {
7889fe52
NIS		 2323 PL_ors_sv = newSVpvn("\n\n",2);
2324 }
2325 else {
8bfdd7d9 2326 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2327 }
79072805
LW		 2328 }
2329 return s;
1a30305b 2330 case 'M':
bbce6d69 2331 forbid_setid("-M"); /* XXX ? */
1a30305b 2332 /* FALL THROUGH */
2333 case 'm':
bbce6d69 2334 forbid_setid("-m"); /* XXX ? */
1a30305b 2335 if (*++s) {
a5f75d66 2336 char *start;
11343788 2337 SV *sv;
a5f75d66
AD		 2338 char *use = "use ";
2339 /* -M-foo == 'no foo' */
2340 if (*s == '-') { use = "no "; ++s; }
11343788 2341 sv = newSVpv(use,0);
a5f75d66 2342 start = s;
1a30305b 2343 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd 2344 while(isALNUM(*s) || *s==':') ++s;
2345 if (*s != '=') {
11343788 2346 sv_catpv(sv, start);
c07a80fd 2347 if (*(start-1) == 'm') {
2348 if (*s != '\0')
cea2e8a9 2349 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2350 sv_catpv( sv, " ()");
c07a80fd 2351 }
2352 } else {
6df41af2 2353 if (s == start)
be98fb35
GS		 2354 Perl_croak(aTHX_ "Module name required with -%c option",
2355 s[-1]);
11343788
MB		 2356 sv_catpvn(sv, start, s-start);
2357 sv_catpv(sv, " split(/,/,q{");
2358 sv_catpv(sv, ++s);
2359 sv_catpv(sv, "})");
c07a80fd 2360 }
1a30305b 2361 s += strlen(s);
5c831c24 2362 if (!PL_preambleav)
3280af22
NIS		 2363 PL_preambleav = newAV();
2364 av_push(PL_preambleav, sv);
1a30305b 2365 }
2366 else
cea2e8a9 2367 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2368 return s;
79072805 2369 case 'n':
3280af22 2370 PL_minus_n = TRUE;
79072805
LW		 2371 s++;
2372 return s;
2373 case 'p':
3280af22 2374 PL_minus_p = TRUE;
79072805
LW		 2375 s++;
2376 return s;
2377 case 's':
bbce6d69 2378 forbid_setid("-s");
3280af22 2379 PL_doswitches = TRUE;
79072805
LW		 2380 s++;
2381 return s;
463ee0b2 2382 case 'T':
3280af22 2383 if (!PL_tainting)
cea2e8a9 2384 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW		 2385 s++;
2386 return s;
79072805 2387 case 'u':
bf4acbe4
GS		 2388#ifdef MACOS_TRADITIONAL
2389 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2390#endif
3280af22 2391 PL_do_undump = TRUE;
79072805
LW		 2392 s++;
2393 return s;
2394 case 'U':
3280af22 2395 PL_unsafe = TRUE;
79072805
LW		 2396 s++;
2397 return s;
2398 case 'v':
8e9464f1 2399#if !defined(DGUX)
b0e47665 2400 PerlIO_printf(PerlIO_stdout(),
d2560b70 2401 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2402 PL_patchlevel, ARCHNAME));
8e9464f1
JH		 2403#else /* DGUX */
2404/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2405 PerlIO_printf(PerlIO_stdout(),
2406 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2407 PerlIO_printf(PerlIO_stdout(),
2408 Perl_form(aTHX_ " built under %s at %s %s\n",
2409 OSNAME, __DATE__, __TIME__));
2410 PerlIO_printf(PerlIO_stdout(),
2411 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2412 OSVERS));
8e9464f1
JH		 2413#endif /* !DGUX */
2414
fb73857a 2415#if defined(LOCAL_PATCH_COUNT)
2416 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS		 2417 PerlIO_printf(PerlIO_stdout(),
2418 "\n(with %d registered patch%s, "
2419 "see perl -V for more detail)",
2420 (int)LOCAL_PATCH_COUNT,
2421 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2422#endif
1a30305b 2423
b0e47665 2424 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2425 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH		 2426#ifdef MACOS_TRADITIONAL
2427 PerlIO_printf(PerlIO_stdout(),
03765510
JH		 2428 "\nMac OS port Copyright 1991-2001, Matthias Neeracher;\n"
2429 "maintained by Chris Nandor\n");
eae9c151 2430#endif
79072805 2431#ifdef MSDOS
b0e47665
GS		 2432 PerlIO_printf(PerlIO_stdout(),
2433 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff 2434#endif
2435#ifdef DJGPP
b0e47665
GS		 2436 PerlIO_printf(PerlIO_stdout(),
2437 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2438 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2439#endif
79072805 2440#ifdef OS2
b0e47665
GS		 2441 PerlIO_printf(PerlIO_stdout(),
2442 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2443 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2444#endif
79072805 2445#ifdef atarist
b0e47665
GS		 2446 PerlIO_printf(PerlIO_stdout(),
2447 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2448#endif
a3f9223b 2449#ifdef __BEOS__
b0e47665
GS		 2450 PerlIO_printf(PerlIO_stdout(),
2451 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2452#endif
1d84e8df 2453#ifdef MPE
b0e47665 2454 PerlIO_printf(PerlIO_stdout(),
dc22e1c4 2455 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2001\n");
1d84e8df 2456#endif
9d116dd7 2457#ifdef OEMVS
b0e47665
GS		 2458 PerlIO_printf(PerlIO_stdout(),
2459 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2460#endif
495c5fdc 2461#ifdef __VOS__
b0e47665
GS		 2462 PerlIO_printf(PerlIO_stdout(),
2463 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2464#endif
092bebab 2465#ifdef __OPEN_VM
b0e47665
GS		 2466 PerlIO_printf(PerlIO_stdout(),
2467 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2468#endif
a1a0e61e 2469#ifdef POSIX_BC
b0e47665
GS		 2470 PerlIO_printf(PerlIO_stdout(),
2471 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2472#endif
61ae2fbf 2473#ifdef __MINT__
b0e47665
GS		 2474 PerlIO_printf(PerlIO_stdout(),
2475 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2476#endif
f83d2536 2477#ifdef EPOC
b0e47665
GS		 2478 PerlIO_printf(PerlIO_stdout(),
2479 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2480#endif
e1caacb4
JH		 2481#ifdef UNDER_CE
2482 printf("WINCE port by Rainer Keuchel, 2001\n");
2483 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2484 wce_hitreturn();
2485#endif
baed7233
DL		 2486#ifdef BINARY_BUILD_NOTICE
2487 BINARY_BUILD_NOTICE;
2488#endif
b0e47665
GS		 2489 PerlIO_printf(PerlIO_stdout(),
2490 "\n\
79072805 2491Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2492GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS		 2493Complete documentation for Perl, including FAQ lists, should be found on\n\
2494this system using `man perl' or `perldoc perl'. If you have access to the\n\
2495Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2496 PerlProc_exit(0);
79072805 2497 case 'w':
599cee73 2498 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2499 PL_dowarn |= G_WARN_ON;
599cee73
PM		 2500 s++;
2501 return s;
2502 case 'W':
ac27b0f5 2503 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
d3a7d8c7 2504 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM		 2505 s++;
2506 return s;
2507 case 'X':
ac27b0f5 2508 PL_dowarn = G_WARN_ALL_OFF;
d3a7d8c7 2509 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW		 2510 s++;
2511 return s;
a0d0e21e 2512 case '*':
79072805
LW		 2513 case ' ':
2514 if (s[1] == '-') /* Additional switches on #! line. */
2515 return s+2;
2516 break;
a0d0e21e 2517 case '-':
79072805 2518 case 0:
51882d45 2519#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS		 2520 case '\r':
2521#endif
79072805
LW		 2522 case '\n':
2523 case '\t':
2524 break;
aa689395 2525#ifdef ALTERNATE_SHEBANG
2526 case 'S': /* OS/2 needs -S on "extproc" line. */
2527 break;
2528#endif
a0d0e21e 2529 case 'P':
3280af22 2530 if (PL_preprocess)
a0d0e21e
LW		 2531 return s+1;
2532 /* FALL THROUGH */
79072805 2533 default:
cea2e8a9 2534 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW		 2535 }
2536 return Nullch;
2537}
2538
2539/* compliments of Tom Christiansen */
2540
2541/* unexec() can be found in the Gnu emacs distribution */
ee580363 2542/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW		 2543
2544void
864dbfa3 2545Perl_my_unexec(pTHX)
79072805
LW		 2546{
2547#ifdef UNEXEC
46fc3d4c 2548 SV* prog;
2549 SV* file;
ee580363 2550 int status = 1;
79072805
LW		 2551 extern int etext;
2552
ee580363 2553 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2554 sv_catpv(prog, "/perl");
6b88bc9c 2555 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2556 sv_catpv(file, ".perldump");
79072805 2557
ee580363
GS		 2558 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2559 /* unexec prints msg to stderr in case of failure */
6ad3d225 2560 PerlProc_exit(status);
79072805 2561#else
a5f75d66
AD		 2562# ifdef VMS
2563# include <lib$routines.h>
2564 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2565# else
79072805 2566 ABORT(); /* for use with undump */
aa689395 2567# endif
a5f75d66 2568#endif
79072805
LW		 2569}
2570
cb68f92d
GS		 2571/* initialize curinterp */
2572STATIC void
cea2e8a9 2573S_init_interp(pTHX)
cb68f92d
GS		 2574{
2575
acfe0abc
GS		 2576#ifdef MULTIPLICITY
2577# define PERLVAR(var,type)
2578# define PERLVARA(var,n,type)
2579# if defined(PERL_IMPLICIT_CONTEXT)
2580# if defined(USE_5005THREADS)
2581# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2582# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS		 2583# else /* !USE_5005THREADS */
2584# define PERLVARI(var,type,init) aTHX->var = init;
2585# define PERLVARIC(var,type,init) aTHX->var = init;
2586# endif /* USE_5005THREADS */
3967c732 2587# else
acfe0abc
GS		 2588# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2589# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2590# endif
acfe0abc
GS		 2591# include "intrpvar.h"
2592# ifndef USE_5005THREADS
2593# include "thrdvar.h"
2594# endif
2595# undef PERLVAR
2596# undef PERLVARA
2597# undef PERLVARI
2598# undef PERLVARIC
2599#else
2600# define PERLVAR(var,type)
2601# define PERLVARA(var,n,type)
2602# define PERLVARI(var,type,init) PL_##var = init;
2603# define PERLVARIC(var,type,init) PL_##var = init;
2604# include "intrpvar.h"
2605# ifndef USE_5005THREADS
2606# include "thrdvar.h"
2607# endif
2608# undef PERLVAR
2609# undef PERLVARA
2610# undef PERLVARI
2611# undef PERLVARIC
cb68f92d
GS		 2612#endif
2613
cb68f92d
GS		 2614}
2615
76e3520e 2616STATIC void
cea2e8a9 2617S_init_main_stash(pTHX)
79072805 2618{
463ee0b2 2619 GV *gv;
6e72f9df 2620
3d47000e 2621
ac27b0f5 2622
3280af22 2623 PL_curstash = PL_defstash = newHV();
79cb57f6 2624 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW		 2625 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2626 SvREFCNT_dec(GvHV(gv));
3280af22 2627 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2628 SvREADONLY_on(gv);
3280af22
NIS		 2629 HvNAME(PL_defstash) = savepv("main");
2630 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2631 GvMULTI_on(PL_incgv);
2632 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2633 GvMULTI_on(PL_hintgv);
2634 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2635 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2636 GvMULTI_on(PL_errgv);
2637 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2638 GvMULTI_on(PL_replgv);
cea2e8a9 2639 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB		 2640 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2641 sv_setpvn(ERRSV, "", 0);
3280af22 2642 PL_curstash = PL_defstash;
11faa288 2643 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2644 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2645 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2646 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2647 /* We must init $/ before switches are processed. */
864dbfa3 2648 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW		 2649}
2650
76e3520e 2651STATIC void
cea2e8a9 2652S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2653{
6c4ab083 2654 *fdscript = -1;
79072805 2655
3280af22
NIS		 2656 if (PL_e_script) {
2657 PL_origfilename = savepv("-e");
96436eeb 2658 }
6c4ab083
GS		 2659 else {
2660 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2661 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS		 2662
2663 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2664 char *s = scriptname + 8;
2665 *fdscript = atoi(s);
2666 while (isDIGIT(*s))
2667 s++;
2668 if (*s) {
2669 scriptname = savepv(s + 1);
3280af22
NIS		 2670 Safefree(PL_origfilename);
2671 PL_origfilename = scriptname;
6c4ab083
GS		 2672 }
2673 }
2674 }
2675
f4dd75d9
GS		 2676#ifdef USE_ITHREADS
2677 Safefree(CopFILE(PL_curcop));
2678#else
2679 SvREFCNT_dec(CopFILEGV(PL_curcop));
2680#endif
57843af0 2681 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2682 if (strEQ(PL_origfilename,"-"))
79072805 2683 scriptname = "";
01f988be 2684 if (*fdscript >= 0) {
3280af22 2685 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
96436eeb 2686#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS		 2687 if (PL_rsfp)
2688 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb 2689#endif
2690 }
3280af22 2691 else if (PL_preprocess) {
46fc3d4c 2692 char *cpp_cfg = CPPSTDIN;
79cb57f6 2693 SV *cpp = newSVpvn("",0);
46fc3d4c 2694 SV *cmd = NEWSV(0,0);
2695
2696 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2697 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2698 sv_catpv(cpp, cpp_cfg);
79072805 2699
0df16ed7 2700 sv_catpvn(sv, "-I", 2);
fed7345c 2701 sv_catpv(sv,PRIVLIB_EXP);
46fc3d4c 2702
14953ddc
MB		 2703 DEBUG_P(PerlIO_printf(Perl_debug_log,
2704 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2705 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
52853b95 2706#if defined(MSDOS) || defined(WIN32)
cea2e8a9 2707 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW		 2708sed %s -e \"/^[^#]/b\" \
2709 -e \"/^#[ ]*include[ ]/b\" \
2710 -e \"/^#[ ]*define[ ]/b\" \
2711 -e \"/^#[ ]*if[ ]/b\" \
2712 -e \"/^#[ ]*ifdef[ ]/b\" \
2713 -e \"/^#[ ]*ifndef[ ]/b\" \
2714 -e \"/^#[ ]*else/b\" \
2715 -e \"/^#[ ]*elif[ ]/b\" \
2716 -e \"/^#[ ]*undef[ ]/b\" \
2717 -e \"/^#[ ]*endif/b\" \
2718 -e \"s/^#.*//\" \
894356b3 2719 %s | %"SVf" -C %"SVf" %s",
6b88bc9c 2720 (PL_doextract ? "-e \"1,/^#/d\n\"" : ""),
79072805 2721#else
092bebab 2722# ifdef __OPEN_VM
cea2e8a9 2723 Perl_sv_setpvf(aTHX_ cmd, "\
092bebab
JH		 2724%s %s -e '/^[^#]/b' \
2725 -e '/^#[ ]*include[ ]/b' \
2726 -e '/^#[ ]*define[ ]/b' \
2727 -e '/^#[ ]*if[ ]/b' \
2728 -e '/^#[ ]*ifdef[ ]/b' \
2729 -e '/^#[ ]*ifndef[ ]/b' \
2730 -e '/^#[ ]*else/b' \
2731 -e '/^#[ ]*elif[ ]/b' \
2732 -e '/^#[ ]*undef[ ]/b' \
2733 -e '/^#[ ]*endif/b' \
2734 -e 's/^[ ]*#.*//' \
894356b3 2735 %s | %"SVf" %"SVf" %s",
092bebab 2736# else
cea2e8a9 2737 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW		 2738%s %s -e '/^[^#]/b' \
2739 -e '/^#[ ]*include[ ]/b' \
2740 -e '/^#[ ]*define[ ]/b' \
2741 -e '/^#[ ]*if[ ]/b' \
2742 -e '/^#[ ]*ifdef[ ]/b' \
2743 -e '/^#[ ]*ifndef[ ]/b' \
2744 -e '/^#[ ]*else/b' \
2745 -e '/^#[ ]*elif[ ]/b' \
2746 -e '/^#[ ]*undef[ ]/b' \
2747 -e '/^#[ ]*endif/b' \
2748 -e 's/^[ ]*#.*//' \
894356b3 2749 %s | %"SVf" -C %"SVf" %s",
092bebab 2750# endif
79072805
LW		 2751#ifdef LOC_SED
2752 LOC_SED,
2753#else
2754 "sed",
2755#endif
3280af22 2756 (PL_doextract ? "-e '1,/^#/d\n'" : ""),
79072805 2757#endif
46fc3d4c 2758 scriptname, cpp, sv, CPPMINUS);
3280af22 2759 PL_doextract = FALSE;
79072805 2760#ifdef IAMSUID /* actually, this is caught earlier */
b28d0864 2761 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
79072805 2762#ifdef HAS_SETEUID
b28d0864 2763 (void)seteuid(PL_uid); /* musn't stay setuid root */
79072805
LW		 2764#else
2765#ifdef HAS_SETREUID
b28d0864 2766 (void)setreuid((Uid_t)-1, PL_uid);
85e6fe83
LW		 2767#else
2768#ifdef HAS_SETRESUID
b28d0864 2769 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
79072805 2770#else
b28d0864 2771 PerlProc_setuid(PL_uid);
79072805
LW		 2772#endif
2773#endif
85e6fe83 2774#endif
b28d0864 2775 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2776 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805
LW		 2777 }
2778#endif /* IAMSUID */
3280af22 2779 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c 2780 SvREFCNT_dec(cmd);
2781 SvREFCNT_dec(cpp);
79072805
LW		 2782 }
2783 else if (!*scriptname) {
bbce6d69 2784 forbid_setid("program input from stdin");
3280af22 2785 PL_rsfp = PerlIO_stdin();
79072805 2786 }
96436eeb 2787 else {
3280af22 2788 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
96436eeb 2789#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS		 2790 if (PL_rsfp)
2791 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb 2792#endif
2793 }
3280af22 2794 if (!PL_rsfp) {
13281fa4 2795#ifdef DOSUID
a687059c 2796#ifndef IAMSUID /* in case script is not readable before setuid */
6b88bc9c 2797 if (PL_euid &&
cc49e20b 2798 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
6b88bc9c
GS		 2799 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2800 {
46fc3d4c 2801 /* try again */
a7cb1f99 2802 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 2803 (int)PERL_REVISION, (int)PERL_VERSION,
2804 (int)PERL_SUBVERSION), PL_origargv);
cea2e8a9 2805 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 2806 }
2807#endif
2808#endif
584d69ec
JH		 2809#ifdef IAMSUID
2810 errno = EPERM;
2811 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2812 Strerror(errno));
2813#else
cea2e8a9 2814 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
cc49e20b 2815 CopFILE(PL_curcop), Strerror(errno));
584d69ec 2816#endif
13281fa4 2817 }
79072805 2818}
8d063cd8 2819
7b89560d
JH		 2820/* Mention
2821 * I_SYSSTATVFS HAS_FSTATVFS
2822 * I_SYSMOUNT
c890dc6c 2823 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH		 2824 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2825 * here so that metaconfig picks them up. */
2826
104d25b7 2827#ifdef IAMSUID
864dbfa3 2828STATIC int
e688b231 2829S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2830{
0545a864
JH		 2831 int check_okay = 0; /* able to do all the required sys/libcalls */
2832 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2833/*
ad27e871 2834 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2835 * fstatvfs() is UNIX98.
0545a864 2836 * fstatfs() is 4.3 BSD.
ad27e871 2837 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH		 2838 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2839 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH		 2840 */
2841
6439433f
JH		 2842#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2843
2844# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2845 defined(HAS_FSTATVFS)
2846# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2847 struct statvfs stfs;
6439433f 2848
104d25b7
JH		 2849 check_okay = fstatvfs(fd, &stfs) == 0;
2850 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2851# endif /* fstatvfs */
ac27b0f5 2852
6439433f
JH		 2853# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2854 defined(PERL_MOUNT_NOSUID) && \
2855 defined(HAS_FSTATFS) && \
2856 defined(HAS_STRUCT_STATFS) && \
2857 defined(HAS_STRUCT_STATFS_F_FLAGS)
2858# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2859 struct statfs stfs;
6439433f 2860
104d25b7 2861 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2862 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH		 2863# endif /* fstatfs */
2864
2865# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2866 defined(PERL_MOUNT_NOSUID) && \
2867 defined(HAS_FSTAT) && \
2868 defined(HAS_USTAT) && \
2869 defined(HAS_GETMNT) && \
2870 defined(HAS_STRUCT_FS_DATA) && \
2871 defined(NOSTAT_ONE)
2872# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2873 struct stat fdst;
6439433f 2874
0545a864 2875 if (fstat(fd, &fdst) == 0) {
6439433f
JH		 2876 struct ustat us;
2877 if (ustat(fdst.st_dev, &us) == 0) {
2878 struct fs_data fsd;
2879 /* NOSTAT_ONE here because we're not examining fields which
2880 * vary between that case and STAT_ONE. */
ad27e871 2881 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH		 2882 size_t cmplen = sizeof(us.f_fname);
2883 if (sizeof(fsd.fd_req.path) < cmplen)
2884 cmplen = sizeof(fsd.fd_req.path);
2885 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2886 fdst.st_dev == fsd.fd_req.dev) {
2887 check_okay = 1;
2888 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2889 }
2890 }
2891 }
2892 }
0545a864 2893 }
6439433f
JH		 2894# endif /* fstat+ustat+getmnt */
2895
2896# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2897 defined(HAS_GETMNTENT) && \
2898 defined(HAS_HASMNTOPT) && \
2899 defined(MNTOPT_NOSUID)
2900# define FD_ON_NOSUID_CHECK_OKAY
2901 FILE *mtab = fopen("/etc/mtab", "r");
2902 struct mntent *entry;
2903 struct stat stb, fsb;
104d25b7
JH		 2904
2905 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH		 2906 while (entry = getmntent(mtab)) {
2907 if (stat(entry->mnt_dir, &fsb) == 0
2908 && fsb.st_dev == stb.st_dev)
2909 {
2910 /* found the filesystem */
2911 check_okay = 1;
2912 if (hasmntopt(entry, MNTOPT_NOSUID))
2913 on_nosuid = 1;
2914 break;
2915 } /* A single fs may well fail its stat(). */
2916 }
104d25b7
JH		 2917 }
2918 if (mtab)
6439433f
JH		 2919 fclose(mtab);
2920# endif /* getmntent+hasmntopt */
0545a864 2921
ac27b0f5 2922 if (!check_okay)
0545a864 2923 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH		 2924 return on_nosuid;
2925}
2926#endif /* IAMSUID */
2927
76e3520e 2928STATIC void
cea2e8a9 2929S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2930{
155aba94 2931#ifdef IAMSUID
96436eeb 2932 int which;
155aba94 2933#endif
96436eeb 2934
13281fa4
LW		 2935 /* do we need to emulate setuid on scripts? */
2936
2937 /* This code is for those BSD systems that have setuid #! scripts disabled
2938 * in the kernel because of a security problem. Merely defining DOSUID
2939 * in perl will not fix that problem, but if you have disabled setuid
2940 * scripts in the kernel, this will attempt to emulate setuid and setgid
2941 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW		 2942 * root version must be called suidperl or sperlN.NNN. If regular perl
2943 * discovers that it has opened a setuid script, it calls suidperl with
2944 * the same argv that it had. If suidperl finds that the script it has
2945 * just opened is NOT setuid root, it sets the effective uid back to the
2946 * uid. We don't just make perl setuid root because that loses the
2947 * effective uid we had before invoking perl, if it was different from the
2948 * uid.
13281fa4
LW		 2949 *
2950 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2951 * be defined in suidperl only. suidperl must be setuid root. The
2952 * Configure script will set this up for you if you want it.
2953 */
a687059c 2954
13281fa4 2955#ifdef DOSUID
6e72f9df 2956 char *s, *s2;
a0d0e21e 2957
b28d0864 2958 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2959 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2960 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2961 I32 len;
2d8e6c8d 2962 STRLEN n_a;
13281fa4 2963
a687059c 2964#ifdef IAMSUID
fe14fcc3 2965#ifndef HAS_SETREUID
a687059c
LW		 2966 /* On this access check to make sure the directories are readable,
2967 * there is actually a small window that the user could use to make
2968 * filename point to an accessible directory. So there is a faint
2969 * chance that someone could execute a setuid script down in a
2970 * non-accessible directory. I don't know what to do about that.
2971 * But I don't think it's too important. The manual lies when
2972 * it says access() is useful in setuid programs.
2973 */
cc49e20b 2974 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2975 Perl_croak(aTHX_ "Permission denied");
a687059c
LW		 2976#else
2977 /* If we can swap euid and uid, then we can determine access rights
2978 * with a simple stat of the file, and then compare device and
2979 * inode to make sure we did stat() on the same file we opened.
2980 * Then we just have to make sure he or she can execute it.
2981 */
2982 {
2983 struct stat tmpstatbuf;
2984
85e6fe83
LW		 2985 if (
2986#ifdef HAS_SETREUID
b28d0864 2987 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW		 2988#else
2989# if HAS_SETRESUID
b28d0864 2990 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 2991# endif
85e6fe83 2992#endif
b28d0864 2993 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 2994 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 2995 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 2996 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 2997#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 2998 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 2999 Perl_croak(aTHX_ "Permission denied");
104d25b7 3000#endif
b28d0864
NIS		 3001 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3002 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3003 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3004 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3005 }
85e6fe83
LW		 3006 if (
3007#ifdef HAS_SETREUID
b28d0864 3008 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW		 3009#else
3010# if defined(HAS_SETRESUID)
b28d0864 3011 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3012# endif
85e6fe83 3013#endif
b28d0864 3014 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3015 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3016 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3017 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3018 }
fe14fcc3 3019#endif /* HAS_SETREUID */
a687059c
LW		 3020#endif /* IAMSUID */
3021
b28d0864 3022 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3023 Perl_croak(aTHX_ "Permission denied");
b28d0864 3024 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3025 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3026 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3027 CopLINE_inc(PL_curcop);
6b88bc9c 3028 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3029 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3030 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3031 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3032 if (*s == ' ') s++;
45d8adaa 3033 while (!isSPACE(*s)) s++;
2d8e6c8d 3034 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df 3035 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3036 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3037 Perl_croak(aTHX_ "Not a perl script");
a687059c 3038 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW		 3039 /*
3040 * #! arg must be what we saw above. They can invoke it by
3041 * mentioning suidperl explicitly, but they may not add any strange
3042 * arguments beyond what #! says if they do invoke suidperl that way.
3043 */
3044 len = strlen(validarg);
3045 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3046 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3047 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW		 3048
3049#ifndef IAMSUID
b28d0864
NIS		 3050 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3051 PL_euid == PL_statbuf.st_uid)
3052 if (!PL_do_undump)
cea2e8a9 3053 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3054FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3055#endif /* IAMSUID */
13281fa4 3056
b28d0864
NIS		 3057 if (PL_euid) { /* oops, we're not the setuid root perl */
3058 (void)PerlIO_close(PL_rsfp);
13281fa4 3059#ifndef IAMSUID
46fc3d4c 3060 /* try again */
a7cb1f99 3061 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3062 (int)PERL_REVISION, (int)PERL_VERSION,
3063 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3064#endif
cea2e8a9 3065 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 3066 }
3067
b28d0864 3068 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3069#ifdef HAS_SETEGID
b28d0864 3070 (void)setegid(PL_statbuf.st_gid);
a687059c 3071#else
fe14fcc3 3072#ifdef HAS_SETREGID
b28d0864 3073 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW		 3074#else
3075#ifdef HAS_SETRESGID
b28d0864 3076 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3077#else
b28d0864 3078 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW		 3079#endif
3080#endif
85e6fe83 3081#endif
b28d0864 3082 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3083 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3084 }
b28d0864
NIS		 3085 if (PL_statbuf.st_mode & S_ISUID) {
3086 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3087#ifdef HAS_SETEUID
b28d0864 3088 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3089#else
fe14fcc3 3090#ifdef HAS_SETREUID
b28d0864 3091 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW		 3092#else
3093#ifdef HAS_SETRESUID
b28d0864 3094 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3095#else
b28d0864 3096 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW		 3097#endif
3098#endif
85e6fe83 3099#endif
b28d0864 3100 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3101 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3102 }
b28d0864 3103 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3104#ifdef HAS_SETEUID
b28d0864 3105 (void)seteuid((Uid_t)PL_uid);
a687059c 3106#else
fe14fcc3 3107#ifdef HAS_SETREUID
b28d0864 3108 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3109#else
85e6fe83 3110#ifdef HAS_SETRESUID
b28d0864 3111 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3112#else
b28d0864 3113 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3114#endif
a687059c
LW		 3115#endif
3116#endif
b28d0864 3117 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3118 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3119 }
748a9306 3120 init_ids();
b28d0864 3121 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3122 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW		 3123 }
3124#ifdef IAMSUID
6b88bc9c 3125 else if (PL_preprocess)
cea2e8a9 3126 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3127 else if (fdscript >= 0)
cea2e8a9 3128 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3129 else
cea2e8a9 3130 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb 3131
3132 /* We absolutely must clear out any saved ids here, so we */
3133 /* exec the real perl, substituting fd script for scriptname. */
3134 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS		 3135 PerlIO_rewind(PL_rsfp);
3136 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS		 3137 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3138 if (!PL_origargv[which])
cea2e8a9
GS		 3139 Perl_croak(aTHX_ "Permission denied");
3140 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3141 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3142#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3143 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3144#endif
a7cb1f99 3145 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3146 (int)PERL_REVISION, (int)PERL_VERSION,
3147 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3148 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3149#endif /* IAMSUID */
a687059c 3150#else /* !DOSUID */
3280af22 3151 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3152#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS		 3153 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3154 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3155 ||
b28d0864 3156 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3157 )
b28d0864 3158 if (!PL_do_undump)
cea2e8a9 3159 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3160FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3161#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3162 /* not set-id, must be wrapped */
a687059c 3163 }
13281fa4 3164#endif /* DOSUID */
79072805 3165}
13281fa4 3166
76e3520e 3167STATIC void
cea2e8a9 3168S_find_beginning(pTHX)
79072805 3169{
6e72f9df 3170 register char *s, *s2;
33b78306
LW		 3171
3172 /* skip forward in input to the real script? */
3173
bbce6d69 3174 forbid_setid("-x");
bf4acbe4 3175#ifdef MACOS_TRADITIONAL
084592ab 3176 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3177
bf4acbe4
GS		 3178 while (PL_doextract || gMacPerl_AlwaysExtract) {
3179 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3180 if (!gMacPerl_AlwaysExtract)
3181 Perl_croak(aTHX_ "No Perl script found in input\n");
3182
3183 if (PL_doextract) /* require explicit override ? */
3184 if (!OverrideExtract(PL_origfilename))
3185 Perl_croak(aTHX_ "User aborted script\n");
3186 else
3187 PL_doextract = FALSE;
3188
3189 /* Pater peccavi, file does not have #! */
3190 PerlIO_rewind(PL_rsfp);
ac27b0f5 3191
bf4acbe4
GS		 3192 break;
3193 }
3194#else
3280af22
NIS		 3195 while (PL_doextract) {
3196 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3197 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3198#endif
4f0c37ba
IZ		 3199 s2 = s;
3200 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS		 3201 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3202 PL_doextract = FALSE;
6e72f9df 3203 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3204 s2 = s;
3205 while (*s == ' ' || *s == '\t') s++;
3206 if (*s++ == '-') {
3207 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3208 if (strnEQ(s2-4,"perl",4))
3209 /*SUPPRESS 530*/
155aba94
GS		 3210 while ((s = moreswitches(s)))
3211 ;
33b78306 3212 }
95e8664e
CN		 3213#ifdef MACOS_TRADITIONAL
3214 break;
3215#endif
83025b21
LW		 3216 }
3217 }
3218}
3219
afe37c7d 3220
76e3520e 3221STATIC void
cea2e8a9 3222S_init_ids(pTHX)
352d5a3a 3223{
d8eceb89
JH		 3224 PL_uid = PerlProc_getuid();
3225 PL_euid = PerlProc_geteuid();
3226 PL_gid = PerlProc_getgid();
3227 PL_egid = PerlProc_getegid();
748a9306 3228#ifdef VMS
b28d0864
NIS		 3229 PL_uid |= PL_gid << 16;
3230 PL_euid |= PL_egid << 16;
748a9306 3231#endif
3280af22 3232 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3233}
79072805 3234
76e3520e 3235STATIC void
cea2e8a9 3236S_forbid_setid(pTHX_ char *s)
bbce6d69 3237{
3280af22 3238 if (PL_euid != PL_uid)
cea2e8a9 3239 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3240 if (PL_egid != PL_gid)
cea2e8a9 3241 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69 3242}
3243
1ee4443e
IZ		 3244void
3245Perl_init_debugger(pTHX)
748a9306 3246{
1ee4443e
IZ		 3247 HV *ostash = PL_curstash;
3248
3280af22
NIS		 3249 PL_curstash = PL_debstash;
3250 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3251 AvREAL_off(PL_dbargs);
3252 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3253 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3254 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3255 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3256 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3257 sv_setiv(PL_DBsingle, 0);
3280af22 3258 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3259 sv_setiv(PL_DBtrace, 0);
3280af22 3260 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3261 sv_setiv(PL_DBsignal, 0);
1ee4443e 3262 PL_curstash = ostash;
352d5a3a
LW		 3263}
3264
2ce36478
SM		 3265#ifndef STRESS_REALLOC
3266#define REASONABLE(size) (size)
3267#else
3268#define REASONABLE(size) (1) /* unreasonable */
3269#endif
3270
11343788 3271void
cea2e8a9 3272Perl_init_stacks(pTHX)
79072805 3273{
e336de0d 3274 /* start with 128-item stack and 8K cxstack */
3280af22 3275 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3276 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS		 3277 PL_curstackinfo->si_type = PERLSI_MAIN;
3278 PL_curstack = PL_curstackinfo->si_stack;
3279 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3280
3280af22
NIS		 3281 PL_stack_base = AvARRAY(PL_curstack);
3282 PL_stack_sp = PL_stack_base;
3283 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3284
3280af22
NIS		 3285 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3286 PL_tmps_floor = -1;
3287 PL_tmps_ix = -1;
3288 PL_tmps_max = REASONABLE(128);
8990e307 3289
3280af22
NIS		 3290 New(54,PL_markstack,REASONABLE(32),I32);
3291 PL_markstack_ptr = PL_markstack;
3292 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3293
ce2f7c3b 3294 SET_MARK_OFFSET;
e336de0d 3295
3280af22
NIS		 3296 New(54,PL_scopestack,REASONABLE(32),I32);
3297 PL_scopestack_ix = 0;
3298 PL_scopestack_max = REASONABLE(32);
79072805 3299
3280af22
NIS		 3300 New(54,PL_savestack,REASONABLE(128),ANY);
3301 PL_savestack_ix = 0;
3302 PL_savestack_max = REASONABLE(128);
79072805 3303
3280af22
NIS		 3304 New(54,PL_retstack,REASONABLE(16),OP*);
3305 PL_retstack_ix = 0;
3306 PL_retstack_max = REASONABLE(16);
378cc40b 3307}
33b78306 3308
2ce36478
SM		 3309#undef REASONABLE
3310
76e3520e 3311STATIC void
cea2e8a9 3312S_nuke_stacks(pTHX)
6e72f9df 3313{
3280af22
NIS		 3314 while (PL_curstackinfo->si_next)
3315 PL_curstackinfo = PL_curstackinfo->si_next;
3316 while (PL_curstackinfo) {
3317 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3318 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS		 3319 Safefree(PL_curstackinfo->si_cxstack);
3320 Safefree(PL_curstackinfo);
3321 PL_curstackinfo = p;
e336de0d 3322 }
3280af22
NIS		 3323 Safefree(PL_tmps_stack);
3324 Safefree(PL_markstack);
3325 Safefree(PL_scopestack);
3326 Safefree(PL_savestack);
3327 Safefree(PL_retstack);
378cc40b 3328}
33b78306 3329
76e3520e 3330STATIC void
cea2e8a9 3331S_init_lexer(pTHX)
8990e307 3332{
06039172 3333 PerlIO *tmpfp;
3280af22
NIS		 3334 tmpfp = PL_rsfp;
3335 PL_rsfp = Nullfp;
3336 lex_start(PL_linestr);
3337 PL_rsfp = tmpfp;
79cb57f6 3338 PL_subname = newSVpvn("main",4);
8990e307
LW		 3339}
3340
76e3520e 3341STATIC void
cea2e8a9 3342S_init_predump_symbols(pTHX)
45d8adaa 3343{
93a17b20 3344 GV *tmpgv;
af8c498a 3345 IO *io;
79072805 3346
864dbfa3 3347 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS		 3348 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3349 GvMULTI_on(PL_stdingv);
af8c498a 3350 io = GvIOp(PL_stdingv);
a04651f4 3351 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3352 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3353 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3354 GvMULTI_on(tmpgv);
af8c498a 3355 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3356
85e6fe83 3357 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3358 GvMULTI_on(tmpgv);
af8c498a 3359 io = GvIOp(tmpgv);
a04651f4 3360 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3361 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3362 setdefout(tmpgv);
adbc6bb1 3363 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3364 GvMULTI_on(tmpgv);
af8c498a 3365 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3366
bf49b057
GS		 3367 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3368 GvMULTI_on(PL_stderrgv);
3369 io = GvIOp(PL_stderrgv);
a04651f4 3370 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3371 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3372 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3373 GvMULTI_on(tmpgv);
af8c498a 3374 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3375
3280af22 3376 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3377
bf4acbe4
GS		 3378 if (PL_osname)
3379 Safefree(PL_osname);
3380 PL_osname = savepv(OSNAME);
79072805 3381}
33b78306 3382
a11ec5a9
RGS		 3383void
3384Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
33b78306 3385{
79072805 3386 char *s;
79072805 3387 argc--,argv++; /* skip name of script */
3280af22 3388 if (PL_doswitches) {
79072805
LW		 3389 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3390 if (!argv[0][1])
3391 break;
379d538a 3392 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW		 3393 argc--,argv++;
3394 break;
3395 }
155aba94 3396 if ((s = strchr(argv[0], '='))) {
79072805 3397 *s++ = '\0';
85e6fe83 3398 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW		 3399 }
3400 else
85e6fe83 3401 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3402 }
79072805 3403 }
a11ec5a9
RGS		 3404 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3405 GvMULTI_on(PL_argvgv);
3406 (void)gv_AVadd(PL_argvgv);
3407 av_clear(GvAVn(PL_argvgv));
3408 for (; argc > 0; argc--,argv++) {
3409 SV *sv = newSVpv(argv[0],0);
3410 av_push(GvAVn(PL_argvgv),sv);
3411 if (PL_widesyscalls)
3412 (void)sv_utf8_decode(sv);
3413 }
3414 }
3415}
3416
3417STATIC void
3418S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3419{
3420 char *s;
3421 SV *sv;
3422 GV* tmpgv;
3423#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
3424 char **dup_env_base = 0;
3425 int dup_env_count = 0;
3426#endif
3427
3280af22
NIS		 3428 PL_toptarget = NEWSV(0,0);
3429 sv_upgrade(PL_toptarget, SVt_PVFM);
3430 sv_setpvn(PL_toptarget, "", 0);
3431 PL_bodytarget = NEWSV(0,0);
3432 sv_upgrade(PL_bodytarget, SVt_PVFM);
3433 sv_setpvn(PL_bodytarget, "", 0);
3434 PL_formtarget = PL_bodytarget;
79072805 3435
bbce6d69 3436 TAINT;
a11ec5a9
RGS		 3437
3438 init_argv_symbols(argc,argv);
3439
155aba94 3440 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS		 3441#ifdef MACOS_TRADITIONAL
3442 /* $0 is not majick on a Mac */
3443 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3444#else
3280af22 3445 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3446 magicname("0", "0", 1);
bf4acbe4 3447#endif
79072805 3448 }
ee2f7564 3449 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))) /* $^X */
ed344e4f 3450#ifdef OS2
23da6c43 3451 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
ed344e4f 3452#else
3280af22 3453 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
ed344e4f 3454#endif
155aba94 3455 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
79072805 3456 HV *hv;
3280af22
NIS		 3457 GvMULTI_on(PL_envgv);
3458 hv = GvHVn(PL_envgv);
14befaf4 3459 hv_magic(hv, Nullgv, PERL_MAGIC_env);
fa6a1c44 3460#ifdef USE_ENVIRON_ARRAY
4633a7c4
LW		 3461 /* Note that if the supplied env parameter is actually a copy
3462 of the global environ then it may now point to free'd memory
3463 if the environment has been modified since. To avoid this
3464 problem we treat env==NULL as meaning 'use the default'
3465 */
3466 if (!env)
3467 env = environ;
5aabfad6 3468 if (env != environ)
79072805 3469 environ[0] = Nullch;
103