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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/*
ccfc67b7
JH		 105=head1 Embedding Functions
106
954c1994
GS		 107=for apidoc perl_alloc
108
109Allocates a new Perl interpreter. See L<perlembed>.
110
111=cut
112*/
113
93a17b20 114PerlInterpreter *
cea2e8a9 115perl_alloc(void)
79072805 116{
cea2e8a9 117 PerlInterpreter *my_perl;
79072805 118
54aff467 119 /* New() needs interpreter, so call malloc() instead */
e8ee3774 120 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 121
06d86050 122 INIT_TLS_AND_INTERP;
dedcbb81 123 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 124 return my_perl;
79072805 125}
32e30700 126#endif /* PERL_IMPLICIT_SYS */
79072805 127
954c1994
GS		 128/*
129=for apidoc perl_construct
130
131Initializes a new Perl interpreter. See L<perlembed>.
132
133=cut
134*/
135
79072805 136void
0cb96387 137perl_construct(pTHXx)
79072805 138{
4d1ff10f 139#ifdef USE_5005THREADS
a863c7d1 140#ifndef FAKE_THREADS
e1f15930 141 struct perl_thread *thr = NULL;
a863c7d1 142#endif /* FAKE_THREADS */
4d1ff10f 143#endif /* USE_5005THREADS */
ba869deb 144
8990e307 145#ifdef MULTIPLICITY
54aff467 146 init_interp();
ac27b0f5 147 PL_perl_destruct_level = 1;
54aff467
GS		 148#else
149 if (PL_perl_destruct_level > 0)
150 init_interp();
151#endif
152
33f46ff6 153 /* Init the real globals (and main thread)? */
3280af22 154 if (!PL_linestr) {
4d1ff10f 155#ifdef USE_5005THREADS
533c011a 156 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB		 157 /*
158 * Safe to use basic SV functions from now on (though
159 * not things like mortals or tainting yet).
160 */
533c011a
NIS		 161 MUTEX_INIT(&PL_eval_mutex);
162 COND_INIT(&PL_eval_cond);
163 MUTEX_INIT(&PL_threads_mutex);
164 COND_INIT(&PL_nthreads_cond);
ba869deb 165# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 166 MUTEX_INIT(&PL_svref_mutex);
ba869deb 167# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 168
5ff3f7a4 169 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS		 170 MUTEX_INIT(&PL_sv_lock_mutex);
171 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 172
199100c8 173 thr = init_main_thread();
4d1ff10f 174#endif /* USE_5005THREADS */
11343788 175
14dd3ad8 176#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 177 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 178#endif
312caa8e 179
2aea9f8a
GS		 180 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
181
3280af22
NIS		 182 PL_linestr = NEWSV(65,79);
183 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 184
3280af22 185 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP		 186 /* set read-only and try to insure than we wont see REFCNT==0
187 very often */
188
3280af22
NIS		 189 SvREADONLY_on(&PL_sv_undef);
190 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 191
3280af22
NIS		 192 sv_setpv(&PL_sv_no,PL_No);
193 SvNV(&PL_sv_no);
194 SvREADONLY_on(&PL_sv_no);
195 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 196
3280af22
NIS		 197 sv_setpv(&PL_sv_yes,PL_Yes);
198 SvNV(&PL_sv_yes);
199 SvREADONLY_on(&PL_sv_yes);
200 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 201 }
79072805 202
cea2e8a9 203 PL_sighandlerp = Perl_sighandler;
3280af22 204 PL_pidstatus = newHV();
44a8e56a 205
79072805
LW		 206#ifdef MSDOS
207 /*
208 * There is no way we can refer to them from Perl so close them to save
209 * space. The other alternative would be to provide STDAUX and STDPRN
210 * filehandles.
211 */
2b96b0a5
JH		 212 (void)PerlIO_close(PerlIO_importFILE(stdaux, 0));
213 (void)PerlIO_close(PerlIO_importFILE(stdprn, 0));
79072805
LW		 214#endif
215 }
216
8bfdd7d9 217 PL_rs = newSVpvn("\n", 1);
dc92893f 218
cea2e8a9 219 init_stacks();
79072805 220
748a9306 221 init_ids();
3280af22 222 PL_lex_state = LEX_NOTPARSING;
a5f75d66 223
312caa8e 224 JMPENV_BOOTSTRAP;
f86702cc 225 STATUS_ALL_SUCCESS;
226
0672f40e 227 init_i18nl10n(1);
36477c24 228 SET_NUMERIC_STANDARD();
0b5b802d 229
a7cb1f99
GS		 230 {
231 U8 *s;
232 PL_patchlevel = NEWSV(0,4);
155aba94 233 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 234 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 235 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 236 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS		 237 /* Build version strings using "native" characters */
238 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
239 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
240 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS		 241 *s = '\0';
242 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
243 SvPOK_on(PL_patchlevel);
244 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
245 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 246#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 247 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 248#endif
a7cb1f99
GS		 249 ;
250 SvNOK_on(PL_patchlevel); /* dual valued */
251 SvUTF8_on(PL_patchlevel);
252 SvREADONLY_on(PL_patchlevel);
253 }
79072805 254
ab821d7f 255#if defined(LOCAL_PATCH_COUNT)
3280af22 256 PL_localpatches = local_patches; /* For possible -v */
ab821d7f 257#endif
258
52853b95
GS		 259#ifdef HAVE_INTERP_INTERN
260 sys_intern_init();
261#endif
262
3a1ee7e8 263 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 264
3280af22
NIS		 265 PL_fdpid = newAV(); /* for remembering popen pids by fd */
266 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 267 PL_errors = newSVpvn("",0);
1fcf4c12 268#ifdef USE_ITHREADS
13137afc
AB		 269 PL_regex_padav = newAV();
270 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
271 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 272#endif
e5dd39fc
AB		 273#ifdef USE_REENTRANT_API
274 New(31337, PL_reentrant_buffer,1, REBUF);
275 New(31337, PL_reentrant_buffer->tmbuff,1, struct tm);
276#endif
3d47000e
AB		 277
278 /* Note that strtab is a rather special HV. Assumptions are made
279 about not iterating on it, and not adding tie magic to it.
280 It is properly deallocated in perl_destruct() */
281 PL_strtab = newHV();
282
283#ifdef USE_5005THREADS
284 MUTEX_INIT(&PL_strtab_mutex);
285#endif
286 HvSHAREKEYS_off(PL_strtab); /* mandatory */
287 hv_ksplit(PL_strtab, 512);
288
0631ea03
AB		 289#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
290 _dyld_lookup_and_bind
291 ("__environ", (unsigned long *) &environ_pointer, NULL);
292#endif /* environ */
293
294#ifdef USE_ENVIRON_ARRAY
295 PL_origenviron = environ;
296#endif
297
8990e307 298 ENTER;
79072805
LW		 299}
300
954c1994
GS		 301/*
302=for apidoc perl_destruct
303
304Shuts down a Perl interpreter. See L<perlembed>.
305
306=cut
307*/
308
31d77e54 309int
0cb96387 310perl_destruct(pTHXx)
79072805 311{
7c474504 312 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 313 HV *hv;
4d1ff10f 314#ifdef USE_5005THREADS
33f46ff6 315 Thread t;
cea2e8a9 316 dTHX;
4d1ff10f 317#endif /* USE_5005THREADS */
8990e307 318
7766f137
GS		 319 /* wait for all pseudo-forked children to finish */
320 PERL_WAIT_FOR_CHILDREN;
321
4d1ff10f 322#ifdef USE_5005THREADS
0f15f207 323#ifndef FAKE_THREADS
8023c3ce
MB		 324 /* Pass 1 on any remaining threads: detach joinables, join zombies */
325 retry_cleanup:
533c011a 326 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 327 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 328 "perl_destruct: waiting for %d threads...\n",
533c011a 329 PL_nthreads - 1));
33f46ff6 330 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB		 331 MUTEX_LOCK(&t->mutex);
332 switch (ThrSTATE(t)) {
333 AV *av;
c7848ba1 334 case THRf_ZOMBIE:
bf49b057 335 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 336 "perl_destruct: joining zombie %p\n", t));
605e5515
MB		 337 ThrSETSTATE(t, THRf_DEAD);
338 MUTEX_UNLOCK(&t->mutex);
533c011a 339 PL_nthreads--;
8023c3ce
MB		 340 /*
341 * The SvREFCNT_dec below may take a long time (e.g. av
342 * may contain an object scalar whose destructor gets
343 * called) so we have to unlock threads_mutex and start
344 * all over again.
345 */
533c011a 346 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 347 JOIN(t, &av);
605e5515 348 SvREFCNT_dec((SV*)av);
bf49b057 349 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 350 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 351 goto retry_cleanup;
c7848ba1 352 case THRf_R_JOINABLE:
bf49b057 353 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 354 "perl_destruct: detaching thread %p\n", t));
355 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 356 /*
c7848ba1
MB		 357 * We unlock threads_mutex and t->mutex in the opposite order
358 * from which we locked them just so that DETACH won't
359 * deadlock if it panics. It's only a breach of good style
360 * not a bug since they are unlocks not locks.
361 */
533c011a 362 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB		 363 DETACH(t);
364 MUTEX_UNLOCK(&t->mutex);
8023c3ce 365 goto retry_cleanup;
c7848ba1 366 default:
bf49b057 367 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 368 "perl_destruct: ignoring %p (state %u)\n",
369 t, ThrSTATE(t)));
370 MUTEX_UNLOCK(&t->mutex);
c7848ba1 371 /* fall through and out */
33f46ff6
MB		 372 }
373 }
8023c3ce
MB		 374 /* We leave the above "Pass 1" loop with threads_mutex still locked */
375
376 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 377 while (PL_nthreads > 1)
11343788 378 {
bf49b057 379 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 380 "perl_destruct: final wait for %d threads\n",
533c011a
NIS		 381 PL_nthreads - 1));
382 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB		 383 }
384 /* At this point, we're the last thread */
533c011a 385 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 386 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS		 387 MUTEX_DESTROY(&PL_threads_mutex);
388 COND_DESTROY(&PL_nthreads_cond);
b57a092c 389 PL_nthreads--;
0f15f207 390#endif /* !defined(FAKE_THREADS) */
4d1ff10f 391#endif /* USE_5005THREADS */
11343788 392
3280af22 393 destruct_level = PL_perl_destruct_level;
4633a7c4
LW		 394#ifdef DEBUGGING
395 {
396 char *s;
155aba94 397 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc 398 int i = atoi(s);
399 if (destruct_level < i)
400 destruct_level = i;
401 }
4633a7c4
LW		 402 }
403#endif
404
31d77e54
AB		 405
406 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB		 407 dJMPENV;
408 int x = 0;
409
410 JMPENV_PUSH(x);
411 if (PL_endav && !PL_minus_c)
412 call_list(PL_scopestack_ix, PL_endav);
413 JMPENV_POP;
26f423df 414 }
f3faeb53 415 LEAVE;
a0d0e21e
LW		 416 FREETMPS;
417
ff0cee69 418 /* We must account for everything. */
419
420 /* Destroy the main CV and syntax tree */
3280af22
NIS		 421 if (PL_main_root) {
422 PL_curpad = AvARRAY(PL_comppad);
423 op_free(PL_main_root);
424 PL_main_root = Nullop;
a0d0e21e 425 }
3280af22
NIS		 426 PL_curcop = &PL_compiling;
427 PL_main_start = Nullop;
428 SvREFCNT_dec(PL_main_cv);
429 PL_main_cv = Nullcv;
24d3c518 430 PL_dirty = TRUE;
ff0cee69 431
13621cfb
NIS		 432 /* Tell PerlIO we are about to tear things apart in case
433 we have layers which are using resources that should
434 be cleaned up now.
435 */
436
437 PerlIO_destruct(aTHX);
438
3280af22 439 if (PL_sv_objcount) {
a0d0e21e
LW		 440 /*
441 * Try to destruct global references. We do this first so that the
442 * destructors and destructees still exist. Some sv's might remain.
443 * Non-referenced objects are on their own.
444 */
a0d0e21e 445 sv_clean_objs();
8990e307
LW		 446 }
447
5cd24f17 448 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS		 449 SvREFCNT_dec(PL_warnhook);
450 PL_warnhook = Nullsv;
451 SvREFCNT_dec(PL_diehook);
452 PL_diehook = Nullsv;
5cd24f17 453
4b556e6c 454 /* call exit list functions */
3280af22 455 while (PL_exitlistlen-- > 0)
acfe0abc 456 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 457
3280af22 458 Safefree(PL_exitlist);
4b556e6c 459
a0d0e21e 460 if (destruct_level == 0){
8990e307 461
a0d0e21e 462 DEBUG_P(debprofdump());
ac27b0f5 463
56a2bab7
NIS		 464#if defined(PERLIO_LAYERS)
465 /* No more IO - including error messages ! */
466 PerlIO_cleanup(aTHX);
467#endif
468
a0d0e21e 469 /* The exit() function will do everything that needs doing. */
31d77e54 470 return STATUS_NATIVE_EXPORT;;
a0d0e21e 471 }
5dd60ef7 472
551a8b83 473 /* jettison our possibly duplicated environment */
4b647fb0
DM		 474 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
475 * so we certainly shouldn't free it here
476 */
477#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
551a8b83
JH		 478 if (environ != PL_origenviron) {
479 I32 i;
480
481 for (i = 0; environ[i]; i++)
4b420006 482 safesysfree(environ[i]);
0631ea03 483
4b420006
JH		 484 /* Must use safesysfree() when working with environ. */
485 safesysfree(environ);
551a8b83
JH		 486
487 environ = PL_origenviron;
488 }
489#endif
490
5f8cb046
DM		 491#ifdef USE_ITHREADS
492 /* the syntax tree is shared between clones
493 * so op_free(PL_main_root) only ReREFCNT_dec's
494 * REGEXPs in the parent interpreter
495 * we need to manually ReREFCNT_dec for the clones
496 */
497 {
498 I32 i = AvFILLp(PL_regex_padav) + 1;
499 SV **ary = AvARRAY(PL_regex_padav);
500
501 while (i) {
35061a7e 502 SV *resv = ary[--i];
ba89bb6e 503 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM		 504
505 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 506 /* this is PL_reg_curpm, already freed
35061a7e
DM		 507 * flag is set in regexec.c:S_regtry
508 */
509 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 510 }
1cc8b4c5
AB		 511 else if(SvREPADTMP(resv)) {
512 SvREPADTMP_off(resv);
513 }
35061a7e 514 else {
5f8cb046
DM		 515 ReREFCNT_dec(re);
516 }
517 }
518 }
519 SvREFCNT_dec(PL_regex_padav);
520 PL_regex_padav = Nullav;
521 PL_regex_pad = NULL;
522#endif
523
5f05dabc 524 /* loosen bonds of global variables */
525
3280af22
NIS		 526 if(PL_rsfp) {
527 (void)PerlIO_close(PL_rsfp);
528 PL_rsfp = Nullfp;
8ebc5c01 529 }
530
531 /* Filters for program text */
3280af22
NIS		 532 SvREFCNT_dec(PL_rsfp_filters);
533 PL_rsfp_filters = Nullav;
8ebc5c01 534
535 /* switches */
3280af22
NIS		 536 PL_preprocess = FALSE;
537 PL_minus_n = FALSE;
538 PL_minus_p = FALSE;
539 PL_minus_l = FALSE;
540 PL_minus_a = FALSE;
541 PL_minus_F = FALSE;
542 PL_doswitches = FALSE;
599cee73 543 PL_dowarn = G_WARN_OFF;
3280af22
NIS		 544 PL_doextract = FALSE;
545 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS		 546 PL_unsafe = FALSE;
547
548 Safefree(PL_inplace);
549 PL_inplace = Nullch;
a7cb1f99 550 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS		 551
552 if (PL_e_script) {
553 SvREFCNT_dec(PL_e_script);
554 PL_e_script = Nullsv;
8ebc5c01 555 }
556
bc0a45ed
DM		 557 while (--PL_origargc >= 0) {
558 Safefree(PL_origargv[PL_origargc]);
559 }
560 Safefree(PL_origargv);
561
8ebc5c01 562 /* magical thingies */
563
7889fe52
NIS		 564 SvREFCNT_dec(PL_ofs_sv); /* $, */
565 PL_ofs_sv = Nullsv;
5f05dabc 566
7889fe52
NIS		 567 SvREFCNT_dec(PL_ors_sv); /* $\ */
568 PL_ors_sv = Nullsv;
8ebc5c01 569
3280af22
NIS		 570 SvREFCNT_dec(PL_rs); /* $/ */
571 PL_rs = Nullsv;
dc92893f 572
d33b2eba
GS		 573 PL_multiline = 0; /* $* */
574 Safefree(PL_osname); /* $^O */
575 PL_osname = Nullch;
5f05dabc 576
3280af22
NIS		 577 SvREFCNT_dec(PL_statname);
578 PL_statname = Nullsv;
579 PL_statgv = Nullgv;
5f05dabc 580
8ebc5c01 581 /* defgv, aka *_ should be taken care of elsewhere */
582
8ebc5c01 583 /* clean up after study() */
3280af22
NIS		 584 SvREFCNT_dec(PL_lastscream);
585 PL_lastscream = Nullsv;
586 Safefree(PL_screamfirst);
587 PL_screamfirst = 0;
588 Safefree(PL_screamnext);
589 PL_screamnext = 0;
8ebc5c01 590
7d5ea4e7
GS		 591 /* float buffer */
592 Safefree(PL_efloatbuf);
593 PL_efloatbuf = Nullch;
594 PL_efloatsize = 0;
595
8ebc5c01 596 /* startup and shutdown function lists */
3280af22 597 SvREFCNT_dec(PL_beginav);
5a837c8f 598 SvREFCNT_dec(PL_beginav_save);
3280af22 599 SvREFCNT_dec(PL_endav);
7d30b5c4 600 SvREFCNT_dec(PL_checkav);
3280af22
NIS		 601 SvREFCNT_dec(PL_initav);
602 PL_beginav = Nullav;
5a837c8f 603 PL_beginav_save = Nullav;
3280af22 604 PL_endav = Nullav;
7d30b5c4 605 PL_checkav = Nullav;
3280af22 606 PL_initav = Nullav;
5618dfe8 607
8ebc5c01 608 /* shortcuts just get cleared */
3280af22 609 PL_envgv = Nullgv;
3280af22
NIS		 610 PL_incgv = Nullgv;
611 PL_hintgv = Nullgv;
612 PL_errgv = Nullgv;
613 PL_argvgv = Nullgv;
614 PL_argvoutgv = Nullgv;
615 PL_stdingv = Nullgv;
bf49b057 616 PL_stderrgv = Nullgv;
3280af22
NIS		 617 PL_last_in_gv = Nullgv;
618 PL_replgv = Nullgv;
5c831c24 619 PL_debstash = Nullhv;
8ebc5c01 620
621 /* reset so print() ends up where we expect */
622 setdefout(Nullgv);
5c831c24 623
7a1c5554
GS		 624 SvREFCNT_dec(PL_argvout_stack);
625 PL_argvout_stack = Nullav;
8ebc5c01 626
5c831c24
GS		 627 SvREFCNT_dec(PL_modglobal);
628 PL_modglobal = Nullhv;
629 SvREFCNT_dec(PL_preambleav);
630 PL_preambleav = Nullav;
631 SvREFCNT_dec(PL_subname);
632 PL_subname = Nullsv;
633 SvREFCNT_dec(PL_linestr);
634 PL_linestr = Nullsv;
635 SvREFCNT_dec(PL_pidstatus);
636 PL_pidstatus = Nullhv;
637 SvREFCNT_dec(PL_toptarget);
638 PL_toptarget = Nullsv;
639 SvREFCNT_dec(PL_bodytarget);
640 PL_bodytarget = Nullsv;
641 PL_formtarget = Nullsv;
642
d33b2eba 643 /* free locale stuff */
b9582b6a 644#ifdef USE_LOCALE_COLLATE
d33b2eba
GS		 645 Safefree(PL_collation_name);
646 PL_collation_name = Nullch;
b9582b6a 647#endif
d33b2eba 648
b9582b6a 649#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS		 650 Safefree(PL_numeric_name);
651 PL_numeric_name = Nullch;
a453c169 652 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 653#endif
d33b2eba 654
5c831c24
GS		 655 /* clear utf8 character classes */
656 SvREFCNT_dec(PL_utf8_alnum);
657 SvREFCNT_dec(PL_utf8_alnumc);
658 SvREFCNT_dec(PL_utf8_ascii);
659 SvREFCNT_dec(PL_utf8_alpha);
660 SvREFCNT_dec(PL_utf8_space);
661 SvREFCNT_dec(PL_utf8_cntrl);
662 SvREFCNT_dec(PL_utf8_graph);
663 SvREFCNT_dec(PL_utf8_digit);
664 SvREFCNT_dec(PL_utf8_upper);
665 SvREFCNT_dec(PL_utf8_lower);
666 SvREFCNT_dec(PL_utf8_print);
667 SvREFCNT_dec(PL_utf8_punct);
668 SvREFCNT_dec(PL_utf8_xdigit);
669 SvREFCNT_dec(PL_utf8_mark);
670 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 671 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 672 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 673 SvREFCNT_dec(PL_utf8_tofold);
5c831c24
GS		 674 PL_utf8_alnum = Nullsv;
675 PL_utf8_alnumc = Nullsv;
676 PL_utf8_ascii = Nullsv;
677 PL_utf8_alpha = Nullsv;
678 PL_utf8_space = Nullsv;
679 PL_utf8_cntrl = Nullsv;
680 PL_utf8_graph = Nullsv;
681 PL_utf8_digit = Nullsv;
682 PL_utf8_upper = Nullsv;
683 PL_utf8_lower = Nullsv;
684 PL_utf8_print = Nullsv;
685 PL_utf8_punct = Nullsv;
686 PL_utf8_xdigit = Nullsv;
687 PL_utf8_mark = Nullsv;
688 PL_utf8_toupper = Nullsv;
689 PL_utf8_totitle = Nullsv;
690 PL_utf8_tolower = Nullsv;
b4e400f9 691 PL_utf8_tofold = Nullsv;
5c831c24 692
971a9dd3
GS		 693 if (!specialWARN(PL_compiling.cop_warnings))
694 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 695 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS		 696 if (!specialCopIO(PL_compiling.cop_io))
697 SvREFCNT_dec(PL_compiling.cop_io);
698 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS		 699 CopFILE_free(&PL_compiling);
700 CopSTASH_free(&PL_compiling);
5c831c24 701
a0d0e21e 702 /* Prepare to destruct main symbol table. */
5f05dabc 703
3280af22
NIS		 704 hv = PL_defstash;
705 PL_defstash = 0;
a0d0e21e 706 SvREFCNT_dec(hv);
5c831c24
GS		 707 SvREFCNT_dec(PL_curstname);
708 PL_curstname = Nullsv;
a0d0e21e 709
5a844595
GS		 710 /* clear queued errors */
711 SvREFCNT_dec(PL_errors);
712 PL_errors = Nullsv;
713
a0d0e21e 714 FREETMPS;
0453d815 715 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 716 if (PL_scopestack_ix != 0)
0453d815
PM		 717 Perl_warner(aTHX_ WARN_INTERNAL,
718 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS		 719 (long)PL_scopestack_ix);
720 if (PL_savestack_ix != 0)
0453d815
PM		 721 Perl_warner(aTHX_ WARN_INTERNAL,
722 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS		 723 (long)PL_savestack_ix);
724 if (PL_tmps_floor != -1)
0453d815 725 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 726 (long)PL_tmps_floor + 1);
a0d0e21e 727 if (cxstack_ix != -1)
0453d815 728 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 729 (long)cxstack_ix + 1);
a0d0e21e 730 }
8990e307
LW		 731
732 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 733 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 734 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH		 735
736 /* the 2 is for PL_fdpid and PL_strtab */
737 while (PL_sv_count > 2 && sv_clean_all())
738 ;
739
d33b2eba
GS		 740 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
741 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS		 742 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
743 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 744
d4777f27
GS		 745 AvREAL_off(PL_fdpid); /* no surviving entries */
746 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS		 747 PL_fdpid = Nullav;
748
6c644e78
GS		 749#ifdef HAVE_INTERP_INTERN
750 sys_intern_clear();
751#endif
752
6e72f9df 753 /* Destruct the global string table. */
754 {
755 /* Yell and reset the HeVAL() slots that are still holding refcounts,
756 * so that sv_free() won't fail on them.
757 */
758 I32 riter;
759 I32 max;
760 HE *hent;
761 HE **array;
762
763 riter = 0;
3280af22
NIS		 764 max = HvMAX(PL_strtab);
765 array = HvARRAY(PL_strtab);
6e72f9df 766 hent = array[0];
767 for (;;) {
0453d815
PM		 768 if (hent && ckWARN_d(WARN_INTERNAL)) {
769 Perl_warner(aTHX_ WARN_INTERNAL,
770 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df 771 HeVAL(hent) - Nullsv, HeKEY(hent));
772 HeVAL(hent) = Nullsv;
773 hent = HeNEXT(hent);
774 }
775 if (!hent) {
776 if (++riter > max)
777 break;
778 hent = array[riter];
779 }
780 }
781 }
3280af22 782 SvREFCNT_dec(PL_strtab);
6e72f9df 783
e652bb2f 784#ifdef USE_ITHREADS
a0739874
DM		 785 /* free the pointer table used for cloning */
786 ptr_table_free(PL_ptr_table);
53186e96 787#endif
a0739874 788
d33b2eba
GS		 789 /* free special SVs */
790
791 SvREFCNT(&PL_sv_yes) = 0;
792 sv_clear(&PL_sv_yes);
793 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 794 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS		 795
796 SvREFCNT(&PL_sv_no) = 0;
797 sv_clear(&PL_sv_no);
798 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 799 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS		 800
801 SvREFCNT(&PL_sv_undef) = 0;
802 SvREADONLY_off(&PL_sv_undef);
d33b2eba 803
0453d815
PM		 804 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
805 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 806
56a2bab7 807#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS		 808 /* No more IO - including error messages ! */
809 PerlIO_cleanup(aTHX);
810#endif
811
3280af22 812 Safefree(PL_origfilename);
3280af22 813 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ		 814 if (PL_reg_curpm)
815 Safefree(PL_reg_curpm);
82ba1be6 816 Safefree(PL_reg_poscache);
3280af22
NIS		 817 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
818 Safefree(PL_op_mask);
cf36064f
GS		 819 Safefree(PL_psig_ptr);
820 Safefree(PL_psig_name);
2c2666fc 821 Safefree(PL_bitcount);
ce08f86c 822 Safefree(PL_psig_pend);
6e72f9df 823 nuke_stacks();
3280af22 824 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 825
a0d0e21e 826 DEBUG_P(debprofdump());
4d1ff10f 827#ifdef USE_5005THREADS
5f08fbcd 828 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS		 829 MUTEX_DESTROY(&PL_sv_mutex);
830 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 831 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 832 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 833 COND_DESTROY(&PL_eval_cond);
11d617a5
GS		 834#ifdef EMULATE_ATOMIC_REFCOUNTS
835 MUTEX_DESTROY(&PL_svref_mutex);
836#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 837
8023c3ce 838 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS		 839 Safefree(SvPVX(PL_thrsv));
840 Safefree(SvANY(PL_thrsv));
841 Safefree(PL_thrsv);
842 PL_thrsv = Nullsv;
4d1ff10f 843#endif /* USE_5005THREADS */
d33b2eba 844
e5dd39fc
AB		 845#ifdef USE_REENTRANT_API
846 Safefree(PL_reentrant_buffer->tmbuff);
847 Safefree(PL_reentrant_buffer);
848#endif
849
612f20c3
GS		 850 sv_free_arenas();
851
fc36a67e 852 /* As the absolutely last thing, free the non-arena SV for mess() */
853
3280af22 854 if (PL_mess_sv) {
9c63abab
GS		 855 /* it could have accumulated taint magic */
856 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
857 MAGIC* mg;
858 MAGIC* moremagic;
859 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
860 moremagic = mg->mg_moremagic;
14befaf4
DM		 861 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
862 && mg->mg_len >= 0)
9c63abab
GS		 863 Safefree(mg->mg_ptr);
864 Safefree(mg);
865 }
866 }
fc36a67e 867 /* we know that type >= SVt_PV */
155aba94 868 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS		 869 Safefree(SvPVX(PL_mess_sv));
870 Safefree(SvANY(PL_mess_sv));
871 Safefree(PL_mess_sv);
872 PL_mess_sv = Nullsv;
fc36a67e 873 }
31d77e54 874 return STATUS_NATIVE_EXPORT;
79072805
LW		 875}
876
954c1994
GS		 877/*
878=for apidoc perl_free
879
880Releases a Perl interpreter. See L<perlembed>.
881
882=cut
883*/
884
79072805 885void
0cb96387 886perl_free(pTHXx)
79072805 887{
acfe0abc 888#if defined(WIN32) || defined(NETWARE)
ce3e5b80 889# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS		 890# ifdef NETWARE
891 void *host = nw_internal_host;
892# else
893 void *host = w32_internal_host;
894# endif
ce3e5b80 895 PerlMem_free(aTHXx);
acfe0abc
GS		 896# ifdef NETWARE
897 nw5_delete_internal_host(host);
898# else
899 win32_delete_internal_host(host);
900# endif
1c0ca838
GS		 901# else
902 PerlMem_free(aTHXx);
903# endif
acfe0abc
GS		 904#else
905 PerlMem_free(aTHXx);
76e3520e 906#endif
79072805
LW		 907}
908
4b556e6c 909void
864dbfa3 910Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 911{
3280af22
NIS		 912 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
913 PL_exitlist[PL_exitlistlen].fn = fn;
914 PL_exitlist[PL_exitlistlen].ptr = ptr;
915 ++PL_exitlistlen;
4b556e6c
JD		 916}
917
954c1994
GS		 918/*
919=for apidoc perl_parse
920
921Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
922
923=cut
924*/
925
79072805 926int
0cb96387 927perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 928{
6224f72b 929 I32 oldscope;
6224f72b 930 int ret;
db36c5a1 931 dJMPENV;
4d1ff10f 932#ifdef USE_5005THREADS
cea2e8a9
GS		 933 dTHX;
934#endif
8d063cd8 935
a687059c
LW		 936#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
937#ifdef IAMSUID
938#undef IAMSUID
cea2e8a9 939 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW		 940setuid perl scripts securely.\n");
941#endif
942#endif
943
3280af22 944 PL_origargc = argc;
bc0a45ed
DM		 945 {
946 /* we copy rather than point to argv
947 * since perl_clone will copy and perl_destruct
3a1ee7e8 948 * has no way of knowing if we've made a copy or
bc0a45ed
DM		 949 * just point to argv
950 */
951 int i = PL_origargc;
952 New(0, PL_origargv, i+1, char*);
953 PL_origargv[i] = '\0';
954 while (i-- > 0) {
955 PL_origargv[i] = savepv(argv[i]);
956 }
957 }
958
0631ea03 959
a0d0e21e 960
3280af22 961 if (PL_do_undump) {
a0d0e21e
LW		 962
963 /* Come here if running an undumped a.out. */
964
3280af22
NIS		 965 PL_origfilename = savepv(argv[0]);
966 PL_do_undump = FALSE;
a0d0e21e 967 cxstack_ix = -1; /* start label stack again */
748a9306 968 init_ids();
a0d0e21e
LW		 969 init_postdump_symbols(argc,argv,env);
970 return 0;
971 }
972
3280af22
NIS		 973 if (PL_main_root) {
974 PL_curpad = AvARRAY(PL_comppad);
975 op_free(PL_main_root);
976 PL_main_root = Nullop;
ff0cee69 977 }
3280af22
NIS		 978 PL_main_start = Nullop;
979 SvREFCNT_dec(PL_main_cv);
980 PL_main_cv = Nullcv;
79072805 981
3280af22
NIS		 982 time(&PL_basetime);
983 oldscope = PL_scopestack_ix;
599cee73 984 PL_dowarn = G_WARN_OFF;
f86702cc 985
14dd3ad8
GS		 986#ifdef PERL_FLEXIBLE_EXCEPTIONS
987 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
988#else
989 JMPENV_PUSH(ret);
990#endif
6224f72b 991 switch (ret) {
312caa8e 992 case 0:
14dd3ad8
GS		 993#ifndef PERL_FLEXIBLE_EXCEPTIONS
994 parse_body(env,xsinit);
995#endif
7d30b5c4
GS		 996 if (PL_checkav)
997 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 998 ret = 0;
999 break;
6224f72b
GS		 1000 case 1:
1001 STATUS_ALL_FAILURE;
1002 /* FALL THROUGH */
1003 case 2:
1004 /* my_exit() was called */
3280af22 1005 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1006 LEAVE;
1007 FREETMPS;
3280af22 1008 PL_curstash = PL_defstash;
7d30b5c4
GS		 1009 if (PL_checkav)
1010 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 1011 ret = STATUS_NATIVE_EXPORT;
1012 break;
6224f72b 1013 case 3:
bf49b057 1014 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS		 1015 ret = 1;
1016 break;
6224f72b 1017 }
14dd3ad8
GS		 1018 JMPENV_POP;
1019 return ret;
1020}
1021
1022#ifdef PERL_FLEXIBLE_EXCEPTIONS
1023STATIC void *
1024S_vparse_body(pTHX_ va_list args)
1025{
1026 char **env = va_arg(args, char**);
1027 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1028
1029 return parse_body(env, xsinit);
312caa8e 1030}
14dd3ad8 1031#endif
312caa8e
CS		 1032
1033STATIC void *
14dd3ad8 1034S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1035{
312caa8e
CS		 1036 int argc = PL_origargc;
1037 char **argv = PL_origargv;
312caa8e
CS		 1038 char *scriptname = NULL;
1039 int fdscript = -1;
1040 VOL bool dosearch = FALSE;
1041 char *validarg = "";
1042 AV* comppadlist;
1043 register SV *sv;
1044 register char *s;
cf756827 1045 char *cddir = Nullch;
312caa8e 1046
3280af22 1047 sv_setpvn(PL_linestr,"",0);
79cb57f6 1048 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS		 1049 SAVEFREESV(sv);
1050 init_main_stash();
54310121 1051
6224f72b
GS		 1052 for (argc--,argv++; argc > 0; argc--,argv++) {
1053 if (argv[0][0] != '-' || !argv[0][1])
1054 break;
1055#ifdef DOSUID
1056 if (*validarg)
1057 validarg = " PHOOEY ";
1058 else
1059 validarg = argv[0];
13281fa4 1060#endif
6224f72b
GS		 1061 s = argv[0]+1;
1062 reswitch:
1063 switch (*s) {
729a02f2
GS		 1064 case 'C':
1065#ifdef WIN32
c0932edc 1066 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS		 1067 /* FALL THROUGH */
1068#endif
1d5472a9
GS		 1069#ifndef PERL_STRICT_CR
1070 case '\r':
1071#endif
6224f72b
GS		 1072 case ' ':
1073 case '0':
1074 case 'F':
1075 case 'a':
1076 case 'c':
1077 case 'd':
1078 case 'D':
1079 case 'h':
1080 case 'i':
1081 case 'l':
1082 case 'M':
1083 case 'm':
1084 case 'n':
1085 case 'p':
1086 case 's':
1087 case 'u':
1088 case 'U':
1089 case 'v':
599cee73
PM		 1090 case 'W':
1091 case 'X':
6224f72b 1092 case 'w':
155aba94 1093 if ((s = moreswitches(s)))
6224f72b
GS		 1094 goto reswitch;
1095 break;
33b78306 1096
1dbad523 1097 case 't':
317ea90d
MS		 1098 if( !PL_tainting ) {
1099 PL_taint_warn = TRUE;
1100 PL_tainting = TRUE;
1101 }
1102 s++;
1103 goto reswitch;
6224f72b 1104 case 'T':
3280af22 1105 PL_tainting = TRUE;
317ea90d 1106 PL_taint_warn = FALSE;
6224f72b
GS		 1107 s++;
1108 goto reswitch;
f86702cc 1109
6224f72b 1110 case 'e':
bf4acbe4
GS		 1111#ifdef MACOS_TRADITIONAL
1112 /* ignore -e for Dev:Pseudo argument */
1113 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1114 break;
bf4acbe4 1115#endif
3280af22 1116 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1117 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1118 if (!PL_e_script) {
79cb57f6 1119 PL_e_script = newSVpvn("",0);
0cb96387 1120 filter_add(read_e_script, NULL);
6224f72b
GS		 1121 }
1122 if (*++s)
3280af22 1123 sv_catpv(PL_e_script, s);
6224f72b 1124 else if (argv[1]) {
3280af22 1125 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS		 1126 argc--,argv++;
1127 }
1128 else
cea2e8a9 1129 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1130 sv_catpv(PL_e_script, "\n");
6224f72b 1131 break;
afe37c7d 1132
6224f72b
GS		 1133 case 'I': /* -I handled both here and in moreswitches() */
1134 forbid_setid("-I");
1135 if (!*++s && (s=argv[1]) != Nullch) {
1136 argc--,argv++;
1137 }
6224f72b 1138 if (s && *s) {
0df16ed7
GS		 1139 char *p;
1140 STRLEN len = strlen(s);
1141 p = savepvn(s, len);
9c8a64f0 1142 incpush(p, TRUE, TRUE);
0df16ed7
GS		 1143 sv_catpvn(sv, "-I", 2);
1144 sv_catpvn(sv, p, len);
1145 sv_catpvn(sv, " ", 1);
6224f72b 1146 Safefree(p);
0df16ed7
GS		 1147 }
1148 else
a67e862a 1149 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS		 1150 break;
1151 case 'P':
1152 forbid_setid("-P");
3280af22 1153 PL_preprocess = TRUE;
6224f72b
GS		 1154 s++;
1155 goto reswitch;
1156 case 'S':
1157 forbid_setid("-S");
1158 dosearch = TRUE;
1159 s++;
1160 goto reswitch;
1161 case 'V':
3280af22
NIS		 1162 if (!PL_preambleav)
1163 PL_preambleav = newAV();
1164 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1165 if (*++s != ':') {
3280af22 1166 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1167#ifdef VMS
6b88bc9c 1168 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1169#else
3280af22 1170 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1171#endif
3280af22 1172 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1173# ifdef DEBUGGING
3280af22 1174 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1175# endif
6224f72b 1176# ifdef MULTIPLICITY
8f872242 1177 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1178# endif
4d1ff10f
AB		 1179# ifdef USE_5005THREADS
1180 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1181# endif
ac5e8965
JH		 1182# ifdef USE_ITHREADS
1183 sv_catpv(PL_Sv," USE_ITHREADS");
1184# endif
10cc9d2a
JH		 1185# ifdef USE_64_BIT_INT
1186 sv_catpv(PL_Sv," USE_64_BIT_INT");
1187# endif
1188# ifdef USE_64_BIT_ALL
1189 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH		 1190# endif
1191# ifdef USE_LONG_DOUBLE
1192 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1193# endif
53430762
JH		 1194# ifdef USE_LARGE_FILES
1195 sv_catpv(PL_Sv," USE_LARGE_FILES");
1196# endif
ac5e8965
JH		 1197# ifdef USE_SOCKS
1198 sv_catpv(PL_Sv," USE_SOCKS");
1199# endif
b363f7ed
GS		 1200# ifdef PERL_IMPLICIT_CONTEXT
1201 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1202# endif
1203# ifdef PERL_IMPLICIT_SYS
1204 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1205# endif
3280af22 1206 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1207
6224f72b
GS		 1208#if defined(LOCAL_PATCH_COUNT)
1209 if (LOCAL_PATCH_COUNT > 0) {
1210 int i;
3280af22 1211 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1212 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1213 if (PL_localpatches[i])
cea2e8a9 1214 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS		 1215 }
1216 }
1217#endif
cea2e8a9 1218 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS		 1219#ifdef __DATE__
1220# ifdef __TIME__
cea2e8a9 1221 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1222# else
cea2e8a9 1223 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS		 1224# endif
1225#endif
3280af22 1226 sv_catpv(PL_Sv, "; \
6224f72b 1227$\"=\"\\n \"; \
69fcd688
JH		 1228@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1229#ifdef __CYGWIN__
1230 sv_catpv(PL_Sv,"\
1231push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1232#endif
1233 sv_catpv(PL_Sv, "\
6224f72b
GS		 1234print \" \\%ENV:\\n @env\\n\" if @env; \
1235print \" \\@INC:\\n @INC\\n\";");
1236 }
1237 else {
3280af22
NIS		 1238 PL_Sv = newSVpv("config_vars(qw(",0);
1239 sv_catpv(PL_Sv, ++s);
1240 sv_catpv(PL_Sv, "))");
6224f72b
GS		 1241 s += strlen(s);
1242 }
3280af22 1243 av_push(PL_preambleav, PL_Sv);
6224f72b
GS		 1244 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1245 goto reswitch;
1246 case 'x':
3280af22 1247 PL_doextract = TRUE;
6224f72b
GS		 1248 s++;
1249 if (*s)
f4c556ac 1250 cddir = s;
6224f72b
GS		 1251 break;
1252 case 0:
1253 break;
1254 case '-':
1255 if (!*++s || isSPACE(*s)) {
1256 argc--,argv++;
1257 goto switch_end;
1258 }
1259 /* catch use of gnu style long options */
1260 if (strEQ(s, "version")) {
1261 s = "v";
1262 goto reswitch;
1263 }
1264 if (strEQ(s, "help")) {
1265 s = "h";
1266 goto reswitch;
1267 }
1268 s--;
1269 /* FALL THROUGH */
1270 default:
cea2e8a9 1271 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW		 1272 }
1273 }
6224f72b 1274 switch_end:
54310121 1275
f675dbe5
CB		 1276 if (
1277#ifndef SECURE_INTERNAL_GETENV
1278 !PL_tainting &&
1279#endif
cf756827 1280 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1281 {
cf756827 1282 char *popt = s;
74288ac8
GS		 1283 while (isSPACE(*s))
1284 s++;
317ea90d 1285 if (*s == '-' && *(s+1) == 'T') {
74288ac8 1286 PL_tainting = TRUE;
317ea90d
MS		 1287 PL_taint_warn = FALSE;
1288 }
74288ac8 1289 else {
cf756827 1290 char *popt_copy = Nullch;
74288ac8 1291 while (s && *s) {
4ea8f8fb 1292 char *d;
74288ac8
GS		 1293 while (isSPACE(*s))
1294 s++;
1295 if (*s == '-') {
1296 s++;
1297 if (isSPACE(*s))
1298 continue;
1299 }
4ea8f8fb 1300 d = s;
74288ac8
GS		 1301 if (!*s)
1302 break;
1c4db469 1303 if (!strchr("DIMUdmtw", *s))
cea2e8a9 1304 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS		 1305 while (++s && *s) {
1306 if (isSPACE(*s)) {
cf756827
GS		 1307 if (!popt_copy) {
1308 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1309 s = popt_copy + (s - popt);
1310 d = popt_copy + (d - popt);
1311 }
4ea8f8fb
MS		 1312 *s++ = '\0';
1313 break;
1314 }
1315 }
1c4db469 1316 if (*d == 't') {
317ea90d
MS		 1317 if( !PL_tainting ) {
1318 PL_taint_warn = TRUE;
1319 PL_tainting = TRUE;
1320 }
1c4db469
RGS		 1321 } else {
1322 moreswitches(d);
1323 }
6224f72b 1324 }
6224f72b
GS		 1325 }
1326 }
a0d0e21e 1327
317ea90d
MS		 1328 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1329 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1330 }
1331
6224f72b
GS		 1332 if (!scriptname)
1333 scriptname = argv[0];
3280af22 1334 if (PL_e_script) {
6224f72b
GS		 1335 argc++,argv--;
1336 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1337 }
1338 else if (scriptname == Nullch) {
1339#ifdef MSDOS
1340 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1341 moreswitches("h");
1342#endif
1343 scriptname = "-";
1344 }
1345
1346 init_perllib();
1347
1348 open_script(scriptname,dosearch,sv,&fdscript);
1349
1350 validate_suid(validarg, scriptname,fdscript);
1351
64ca3a65 1352#ifndef PERL_MICRO
0b5b802d
GS		 1353#if defined(SIGCHLD) || defined(SIGCLD)
1354 {
1355#ifndef SIGCHLD
1356# define SIGCHLD SIGCLD
1357#endif
1358 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1359 if (sigstate == SIG_IGN) {
1360 if (ckWARN(WARN_SIGNAL))
1361 Perl_warner(aTHX_ WARN_SIGNAL,
1362 "Can't ignore signal CHLD, forcing to default");
1363 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1364 }
1365 }
1366#endif
64ca3a65 1367#endif
0b5b802d 1368
bf4acbe4
GS		 1369#ifdef MACOS_TRADITIONAL
1370 if (PL_doextract || gMacPerl_AlwaysExtract) {
1371#else
f4c556ac 1372 if (PL_doextract) {
bf4acbe4 1373#endif
6224f72b 1374 find_beginning();
f4c556ac
GS		 1375 if (cddir && PerlDir_chdir(cddir) < 0)
1376 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1377
1378 }
6224f72b 1379
3280af22
NIS		 1380 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1381 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1382 CvUNIQUE_on(PL_compcv);
1383
1384 PL_comppad = newAV();
1385 av_push(PL_comppad, Nullsv);
1386 PL_curpad = AvARRAY(PL_comppad);
1387 PL_comppad_name = newAV();
1388 PL_comppad_name_fill = 0;
1389 PL_min_intro_pending = 0;
1390 PL_padix = 0;
4d1ff10f 1391#ifdef USE_5005THREADS
79cb57f6 1392 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS		 1393 PL_curpad[0] = (SV*)newAV();
1394 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1395 CvOWNER(PL_compcv) = 0;
1396 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1397 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1398#endif /* USE_5005THREADS */
6224f72b
GS		 1399
1400 comppadlist = newAV();
1401 AvREAL_off(comppadlist);
3280af22
NIS		 1402 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1403 av_store(comppadlist, 1, (SV*)PL_comppad);
1404 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1405
0c4f7ff0 1406 boot_core_PerlIO();
6224f72b 1407 boot_core_UNIVERSAL();
9a34ef1d 1408#ifndef PERL_MICRO
09bef843 1409 boot_core_xsutils();
9a34ef1d 1410#endif
6224f72b
GS		 1411
1412 if (xsinit)
acfe0abc 1413 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1414#ifndef PERL_MICRO
ed79a026 1415#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1416 init_os_extras();
6224f72b 1417#endif
64ca3a65 1418#endif
6224f72b 1419
29209bc5 1420#ifdef USE_SOCKS
1b9c9cf5
DH		 1421# ifdef HAS_SOCKS5_INIT
1422 socks5_init(argv[0]);
1423# else
29209bc5 1424 SOCKSinit(argv[0]);
1b9c9cf5 1425# endif
ac27b0f5 1426#endif
29209bc5 1427
6224f72b
GS		 1428 init_predump_symbols();
1429 /* init_postdump_symbols not currently designed to be called */
1430 /* more than once (ENV isn't cleared first, for example) */
1431 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1432 if (!PL_do_undump)
6224f72b
GS		 1433 init_postdump_symbols(argc,argv,env);
1434
1435 init_lexer();
1436
1437 /* now parse the script */
1438
91487cfc 1439 SETERRNO(0,SS$_NORMAL);
3280af22 1440 PL_error_count = 0;
bf4acbe4
GS		 1441#ifdef MACOS_TRADITIONAL
1442 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1443 if (PL_minus_c)
1444 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1445 else {
1446 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1447 MacPerl_MPWFileName(PL_origfilename));
1448 }
1449 }
1450#else
3280af22
NIS		 1451 if (yyparse() || PL_error_count) {
1452 if (PL_minus_c)
cea2e8a9 1453 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1454 else {
cea2e8a9 1455 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1456 PL_origfilename);
6224f72b
GS		 1457 }
1458 }
bf4acbe4 1459#endif
57843af0 1460 CopLINE_set(PL_curcop, 0);
3280af22
NIS		 1461 PL_curstash = PL_defstash;
1462 PL_preprocess = FALSE;
1463 if (PL_e_script) {
1464 SvREFCNT_dec(PL_e_script);
1465 PL_e_script = Nullsv;
6224f72b
GS		 1466 }
1467
8bfdd7d9
HS		 1468/*
1469 Not sure that this is still the right place to do this now that we
1470 no longer use PL_nrs. HVDS 2001/09/09
1471*/
864dbfa3 1472 sv_setsv(get_sv("/", TRUE), PL_rs);
8bfdd7d9 1473
3280af22 1474 if (PL_do_undump)
6224f72b
GS		 1475 my_unexec();
1476
57843af0
GS		 1477 if (isWARN_ONCE) {
1478 SAVECOPFILE(PL_curcop);
1479 SAVECOPLINE(PL_curcop);
3280af22 1480 gv_check(PL_defstash);
57843af0 1481 }
6224f72b
GS		 1482
1483 LEAVE;
1484 FREETMPS;
1485
1486#ifdef MYMALLOC
1487 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1488 dump_mstats("after compilation:");
1489#endif
1490
1491 ENTER;
3280af22 1492 PL_restartop = 0;
312caa8e 1493 return NULL;
6224f72b
GS		 1494}
1495
954c1994
GS		 1496/*
1497=for apidoc perl_run
1498
1499Tells a Perl interpreter to run. See L<perlembed>.
1500
1501=cut
1502*/
1503
6224f72b 1504int
0cb96387 1505perl_run(pTHXx)
6224f72b 1506{
6224f72b 1507 I32 oldscope;
14dd3ad8 1508 int ret = 0;
db36c5a1 1509 dJMPENV;
4d1ff10f 1510#ifdef USE_5005THREADS
cea2e8a9
GS		 1511 dTHX;
1512#endif
6224f72b 1513
3280af22 1514 oldscope = PL_scopestack_ix;
96e176bf
CL		 1515#ifdef VMS
1516 VMSISH_HUSHED = 0;
1517#endif
6224f72b 1518
14dd3ad8 1519#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1520 redo_body:
14dd3ad8
GS		 1521 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1522#else
1523 JMPENV_PUSH(ret);
1524#endif
6224f72b
GS		 1525 switch (ret) {
1526 case 1:
1527 cxstack_ix = -1; /* start context stack again */
312caa8e 1528 goto redo_body;
14dd3ad8
GS		 1529 case 0: /* normal completion */
1530#ifndef PERL_FLEXIBLE_EXCEPTIONS
1531 redo_body:
1532 run_body(oldscope);
1533#endif
1534 /* FALL THROUGH */
1535 case 2: /* my_exit() */
3280af22 1536 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1537 LEAVE;
1538 FREETMPS;
3280af22 1539 PL_curstash = PL_defstash;
3a1ee7e8 1540 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB		 1541 PL_endav && !PL_minus_c)
1542 call_list(oldscope, PL_endav);
6224f72b
GS		 1543#ifdef MYMALLOC
1544 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1545 dump_mstats("after execution: ");
1546#endif
14dd3ad8
GS		 1547 ret = STATUS_NATIVE_EXPORT;
1548 break;
6224f72b 1549 case 3:
312caa8e
CS		 1550 if (PL_restartop) {
1551 POPSTACK_TO(PL_mainstack);
1552 goto redo_body;
6224f72b 1553 }
bf49b057 1554 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1555 FREETMPS;
14dd3ad8
GS		 1556 ret = 1;
1557 break;
6224f72b
GS		 1558 }
1559
14dd3ad8
GS		 1560 JMPENV_POP;
1561 return ret;
312caa8e
CS		 1562}
1563
14dd3ad8 1564#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1565STATIC void *
14dd3ad8 1566S_vrun_body(pTHX_ va_list args)
312caa8e 1567{
312caa8e
CS		 1568 I32 oldscope = va_arg(args, I32);
1569
14dd3ad8
GS		 1570 return run_body(oldscope);
1571}
1572#endif
1573
1574
1575STATIC void *
1576S_run_body(pTHX_ I32 oldscope)
1577{
6224f72b 1578 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1579 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1580
3280af22 1581 if (!PL_restartop) {
6224f72b
GS		 1582 DEBUG_x(dump_all());
1583 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH		 1584 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1585 PTR2UV(thr)));
6224f72b 1586
3280af22 1587 if (PL_minus_c) {
bf4acbe4 1588#ifdef MACOS_TRADITIONAL
be708cc0 1589 PerlIO_printf(Perl_error_log, "# %s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1590#else
bf49b057 1591 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1592#endif
6224f72b
GS		 1593 my_exit(0);
1594 }
3280af22 1595 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1596 sv_setiv(PL_DBsingle, 1);
3280af22
NIS		 1597 if (PL_initav)
1598 call_list(oldscope, PL_initav);
6224f72b
GS		 1599 }
1600
1601 /* do it */
1602
3280af22 1603 if (PL_restartop) {
533c011a 1604 PL_op = PL_restartop;
3280af22 1605 PL_restartop = 0;
cea2e8a9 1606 CALLRUNOPS(aTHX);
6224f72b 1607 }
3280af22
NIS		 1608 else if (PL_main_start) {
1609 CvDEPTH(PL_main_cv) = 1;
533c011a 1610 PL_op = PL_main_start;
cea2e8a9 1611 CALLRUNOPS(aTHX);
6224f72b
GS		 1612 }
1613
f6b3007c
JH		 1614 my_exit(0);
1615 /* NOTREACHED */
312caa8e 1616 return NULL;
6224f72b
GS		 1617}
1618
954c1994 1619/*
ccfc67b7
JH		 1620=head1 SV Manipulation Functions
1621
954c1994
GS		 1622=for apidoc p||get_sv
1623
1624Returns the SV of the specified Perl scalar. If C<create> is set and the
1625Perl variable does not exist then it will be created. If C<create> is not
1626set and the variable does not exist then NULL is returned.
1627
1628=cut
1629*/
1630
6224f72b 1631SV*
864dbfa3 1632Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS		 1633{
1634 GV *gv;
4d1ff10f 1635#ifdef USE_5005THREADS
6224f72b
GS		 1636 if (name[1] == '\0' && !isALPHA(name[0])) {
1637 PADOFFSET tmp = find_threadsv(name);
411caa50 1638 if (tmp != NOT_IN_PAD)
6224f72b 1639 return THREADSV(tmp);
6224f72b 1640 }
4d1ff10f 1641#endif /* USE_5005THREADS */
6224f72b
GS		 1642 gv = gv_fetchpv(name, create, SVt_PV);
1643 if (gv)
1644 return GvSV(gv);
1645 return Nullsv;
1646}
1647
954c1994 1648/*
ccfc67b7
JH		 1649=head1 Array Manipulation Functions
1650
954c1994
GS		 1651=for apidoc p||get_av
1652
1653Returns the AV of the specified Perl array. If C<create> is set and the
1654Perl variable does not exist then it will be created. If C<create> is not
1655set and the variable does not exist then NULL is returned.
1656
1657=cut
1658*/
1659
6224f72b 1660AV*
864dbfa3 1661Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS		 1662{
1663 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1664 if (create)
1665 return GvAVn(gv);
1666 if (gv)
1667 return GvAV(gv);
1668 return Nullav;
1669}
1670
954c1994 1671/*
ccfc67b7
JH		 1672=head1 Hash Manipulation Functions
1673
954c1994
GS		 1674=for apidoc p||get_hv
1675
1676Returns the HV of the specified Perl hash. If C<create> is set and the
1677Perl variable does not exist then it will be created. If C<create> is not
1678set and the variable does not exist then NULL is returned.
1679
1680=cut
1681*/
1682
6224f72b 1683HV*
864dbfa3 1684Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1685{
a0d0e21e
LW		 1686 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1687 if (create)
1688 return GvHVn(gv);
1689 if (gv)
1690 return GvHV(gv);
1691 return Nullhv;
1692}
1693
954c1994 1694/*
ccfc67b7
JH		 1695=head1 CV Manipulation Functions
1696
954c1994
GS		 1697=for apidoc p||get_cv
1698
1699Returns the CV of the specified Perl subroutine. If C<create> is set and
1700the Perl subroutine does not exist then it will be declared (which has the
1701same effect as saying C<sub name;>). If C<create> is not set and the
1702subroutine does not exist then NULL is returned.
1703
1704=cut
1705*/
1706
a0d0e21e 1707CV*
864dbfa3 1708Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW		 1709{
1710 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1711 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS		 1712 /* XXX this is probably not what they think they're getting.
1713 * It has the same effect as "sub name;", i.e. just a forward
1714 * declaration! */
8ebc5c01 1715 if (create && !GvCVu(gv))
774d564b 1716 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1717 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1718 Nullop,
a0d0e21e
LW		 1719 Nullop);
1720 if (gv)
8ebc5c01 1721 return GvCVu(gv);
a0d0e21e
LW		 1722 return Nullcv;
1723}
1724
79072805
LW		 1725/* Be sure to refetch the stack pointer after calling these routines. */
1726
954c1994 1727/*
ccfc67b7
JH		 1728
1729=head1 Callback Functions
1730
954c1994
GS		 1731=for apidoc p||call_argv
1732
1733Performs a callback to the specified Perl sub. See L<perlcall>.
1734
1735=cut
1736*/
1737
a0d0e21e 1738I32
864dbfa3 1739Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1740
8ac85365
NIS		 1741 /* See G_* flags in cop.h */
1742 /* null terminated arg list */
8990e307 1743{
a0d0e21e 1744 dSP;
8990e307 1745
924508f0 1746 PUSHMARK(SP);
a0d0e21e 1747 if (argv) {
8990e307 1748 while (*argv) {
a0d0e21e 1749 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW		 1750 argv++;
1751 }
a0d0e21e 1752 PUTBACK;
8990e307 1753 }
864dbfa3 1754 return call_pv(sub_name, flags);
8990e307
LW		 1755}
1756
954c1994
GS		 1757/*
1758=for apidoc p||call_pv
1759
1760Performs a callback to the specified Perl sub. See L<perlcall>.
1761
1762=cut
1763*/
1764
a0d0e21e 1765I32
864dbfa3 1766Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS		 1767 /* name of the subroutine */
1768 /* See G_* flags in cop.h */
a0d0e21e 1769{
864dbfa3 1770 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW		 1771}
1772
954c1994
GS		 1773/*
1774=for apidoc p||call_method
1775
1776Performs a callback to the specified Perl method. The blessed object must
1777be on the stack. See L<perlcall>.
1778
1779=cut
1780*/
1781
a0d0e21e 1782I32
864dbfa3 1783Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS		 1784 /* name of the subroutine */
1785 /* See G_* flags in cop.h */
a0d0e21e 1786{
968b3946 1787 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW		 1788}
1789
1790/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS		 1791/*
1792=for apidoc p||call_sv
1793
1794Performs a callback to the Perl sub whose name is in the SV. See
1795L<perlcall>.
1796
1797=cut
1798*/
1799
a0d0e21e 1800I32
864dbfa3 1801Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1802 /* See G_* flags in cop.h */
a0d0e21e 1803{
924508f0 1804 dSP;
a0d0e21e 1805 LOGOP myop; /* fake syntax tree node */
968b3946 1806 UNOP method_op;
aa689395 1807 I32 oldmark;
13689cfe 1808 volatile I32 retval = 0;
a0d0e21e 1809 I32 oldscope;
54310121 1810 bool oldcatch = CATCH_GET;
6224f72b 1811 int ret;
533c011a 1812 OP* oldop = PL_op;
db36c5a1 1813 dJMPENV;
1e422769 1814
a0d0e21e
LW		 1815 if (flags & G_DISCARD) {
1816 ENTER;
1817 SAVETMPS;
1818 }
1819
aa689395 1820 Zero(&myop, 1, LOGOP);
54310121 1821 myop.op_next = Nullop;
f51d4af5 1822 if (!(flags & G_NOARGS))
aa689395 1823 myop.op_flags |= OPf_STACKED;
54310121 1824 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1825 (flags & G_ARRAY) ? OPf_WANT_LIST :
1826 OPf_WANT_SCALAR);
462e5cf6 1827 SAVEOP();
533c011a 1828 PL_op = (OP*)&myop;
aa689395 1829
3280af22
NIS		 1830 EXTEND(PL_stack_sp, 1);
1831 *++PL_stack_sp = sv;
aa689395 1832 oldmark = TOPMARK;
3280af22 1833 oldscope = PL_scopestack_ix;
a0d0e21e 1834
3280af22 1835 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1836 /* Handle first BEGIN of -d. */
3280af22 1837 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24 1838 /* Try harder, since this may have been a sighandler, thus
1839 * curstash may be meaningless. */
3280af22 1840 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1841 && !(flags & G_NODEBUG))
533c011a 1842 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1843
968b3946
GS		 1844 if (flags & G_METHOD) {
1845 Zero(&method_op, 1, UNOP);
1846 method_op.op_next = PL_op;
1847 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1848 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1849 PL_op = (OP*)&method_op;
968b3946
GS		 1850 }
1851
312caa8e 1852 if (!(flags & G_EVAL)) {
0cdb2077 1853 CATCH_SET(TRUE);
14dd3ad8 1854 call_body((OP*)&myop, FALSE);
312caa8e 1855 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1856 CATCH_SET(oldcatch);
312caa8e
CS		 1857 }
1858 else {
d78bda3d 1859 myop.op_other = (OP*)&myop;
3280af22 1860 PL_markstack_ptr--;
4633a7c4
LW		 1861 /* we're trying to emulate pp_entertry() here */
1862 {
c09156bb 1863 register PERL_CONTEXT *cx;
54310121 1864 I32 gimme = GIMME_V;
ac27b0f5 1865
4633a7c4
LW		 1866 ENTER;
1867 SAVETMPS;
ac27b0f5 1868
968b3946 1869 push_return(Nullop);
1d76a5c3 1870 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1871 PUSHEVAL(cx, 0, 0);
533c011a 1872 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1873
faef0170 1874 PL_in_eval = EVAL_INEVAL;
4633a7c4 1875 if (flags & G_KEEPERR)
faef0170 1876 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1877 else
38a03e6e 1878 sv_setpv(ERRSV,"");
4633a7c4 1879 }
3280af22 1880 PL_markstack_ptr++;
a0d0e21e 1881
14dd3ad8
GS		 1882#ifdef PERL_FLEXIBLE_EXCEPTIONS
1883 redo_body:
1884 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1885 (OP*)&myop, FALSE);
14dd3ad8
GS		 1886#else
1887 JMPENV_PUSH(ret);
1888#endif
6224f72b
GS		 1889 switch (ret) {
1890 case 0:
14dd3ad8
GS		 1891#ifndef PERL_FLEXIBLE_EXCEPTIONS
1892 redo_body:
1893 call_body((OP*)&myop, FALSE);
1894#endif
312caa8e
CS		 1895 retval = PL_stack_sp - (PL_stack_base + oldmark);
1896 if (!(flags & G_KEEPERR))
1897 sv_setpv(ERRSV,"");
a0d0e21e 1898 break;
6224f72b 1899 case 1:
f86702cc 1900 STATUS_ALL_FAILURE;
a0d0e21e 1901 /* FALL THROUGH */
6224f72b 1902 case 2:
a0d0e21e 1903 /* my_exit() was called */
3280af22 1904 PL_curstash = PL_defstash;
a0d0e21e 1905 FREETMPS;
14dd3ad8 1906 JMPENV_POP;
cc3604b1 1907 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1908 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1909 my_exit_jump();
a0d0e21e 1910 /* NOTREACHED */
6224f72b 1911 case 3:
3280af22 1912 if (PL_restartop) {
533c011a 1913 PL_op = PL_restartop;
3280af22 1914 PL_restartop = 0;
312caa8e 1915 goto redo_body;
a0d0e21e 1916 }
3280af22 1917 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1918 if (flags & G_ARRAY)
1919 retval = 0;
1920 else {
1921 retval = 1;
3280af22 1922 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1923 }
312caa8e 1924 break;
a0d0e21e 1925 }
a0d0e21e 1926
3280af22 1927 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW		 1928 SV **newsp;
1929 PMOP *newpm;
1930 I32 gimme;
c09156bb 1931 register PERL_CONTEXT *cx;
a0a2876f
LW		 1932 I32 optype;
1933
1934 POPBLOCK(cx,newpm);
1935 POPEVAL(cx);
1936 pop_return();
3280af22 1937 PL_curpm = newpm;
a0a2876f 1938 LEAVE;
a0d0e21e 1939 }
14dd3ad8 1940 JMPENV_POP;
a0d0e21e 1941 }
1e422769 1942
a0d0e21e 1943 if (flags & G_DISCARD) {
3280af22 1944 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1945 retval = 0;
1946 FREETMPS;
1947 LEAVE;
1948 }
533c011a 1949 PL_op = oldop;
a0d0e21e
LW		 1950 return retval;
1951}
1952
14dd3ad8 1953#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1954STATIC void *
14dd3ad8 1955S_vcall_body(pTHX_ va_list args)
312caa8e
CS		 1956{
1957 OP *myop = va_arg(args, OP*);
1958 int is_eval = va_arg(args, int);
1959
14dd3ad8 1960 call_body(myop, is_eval);
312caa8e
CS		 1961 return NULL;
1962}
14dd3ad8 1963#endif
312caa8e
CS		 1964
1965STATIC void
14dd3ad8 1966S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1967{
312caa8e
CS		 1968 if (PL_op == myop) {
1969 if (is_eval)
f807eda9 1970 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1971 else
f807eda9 1972 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS		 1973 }
1974 if (PL_op)
cea2e8a9 1975 CALLRUNOPS(aTHX);
312caa8e
CS		 1976}
1977
6e72f9df 1978/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1979
954c1994
GS		 1980/*
1981=for apidoc p||eval_sv
1982
1983Tells Perl to C<eval> the string in the SV.
1984
1985=cut
1986*/
1987
a0d0e21e 1988I32
864dbfa3 1989Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1990
8ac85365 1991 /* See G_* flags in cop.h */
a0d0e21e 1992{
924508f0 1993 dSP;
a0d0e21e 1994 UNOP myop; /* fake syntax tree node */
8fa7f367 1995 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1996 volatile I32 retval = 0;
4633a7c4 1997 I32 oldscope;
6224f72b 1998 int ret;
533c011a 1999 OP* oldop = PL_op;
db36c5a1 2000 dJMPENV;
84902520 2001
4633a7c4
LW		 2002 if (flags & G_DISCARD) {
2003 ENTER;
2004 SAVETMPS;
2005 }
2006
462e5cf6 2007 SAVEOP();
533c011a
NIS		 2008 PL_op = (OP*)&myop;
2009 Zero(PL_op, 1, UNOP);
3280af22
NIS		 2010 EXTEND(PL_stack_sp, 1);
2011 *++PL_stack_sp = sv;
2012 oldscope = PL_scopestack_ix;
79072805 2013
4633a7c4
LW		 2014 if (!(flags & G_NOARGS))
2015 myop.op_flags = OPf_STACKED;
79072805 2016 myop.op_next = Nullop;
6e72f9df 2017 myop.op_type = OP_ENTEREVAL;
54310121 2018 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2019 (flags & G_ARRAY) ? OPf_WANT_LIST :
2020 OPf_WANT_SCALAR);
6e72f9df 2021 if (flags & G_KEEPERR)
2022 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2023
14dd3ad8 2024#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2025 redo_body:
14dd3ad8 2026 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2027 (OP*)&myop, TRUE);
14dd3ad8
GS		 2028#else
2029 JMPENV_PUSH(ret);
2030#endif
6224f72b
GS		 2031 switch (ret) {
2032 case 0:
14dd3ad8
GS		 2033#ifndef PERL_FLEXIBLE_EXCEPTIONS
2034 redo_body:
2035 call_body((OP*)&myop,TRUE);
2036#endif
312caa8e
CS		 2037 retval = PL_stack_sp - (PL_stack_base + oldmark);
2038 if (!(flags & G_KEEPERR))
2039 sv_setpv(ERRSV,"");
4633a7c4 2040 break;
6224f72b 2041 case 1:
f86702cc 2042 STATUS_ALL_FAILURE;
4633a7c4 2043 /* FALL THROUGH */
6224f72b 2044 case 2:
4633a7c4 2045 /* my_exit() was called */
3280af22 2046 PL_curstash = PL_defstash;
4633a7c4 2047 FREETMPS;
14dd3ad8 2048 JMPENV_POP;
cc3604b1 2049 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2050 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2051 my_exit_jump();
4633a7c4 2052 /* NOTREACHED */
6224f72b 2053 case 3:
3280af22 2054 if (PL_restartop) {
533c011a 2055 PL_op = PL_restartop;
3280af22 2056 PL_restartop = 0;
312caa8e 2057 goto redo_body;
4633a7c4 2058 }
3280af22 2059 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2060 if (flags & G_ARRAY)
2061 retval = 0;
2062 else {
2063 retval = 1;
3280af22 2064 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2065 }
312caa8e 2066 break;
4633a7c4
LW		 2067 }
2068
14dd3ad8 2069 JMPENV_POP;
4633a7c4 2070 if (flags & G_DISCARD) {
3280af22 2071 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2072 retval = 0;
2073 FREETMPS;
2074 LEAVE;
2075 }
533c011a 2076 PL_op = oldop;
4633a7c4
LW		 2077 return retval;
2078}
2079
954c1994
GS		 2080/*
2081=for apidoc p||eval_pv
2082
2083Tells Perl to C<eval> the given string and return an SV* result.
2084
2085=cut
2086*/
2087
137443ea 2088SV*
864dbfa3 2089Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 2090{
2091 dSP;
2092 SV* sv = newSVpv(p, 0);
2093
864dbfa3 2094 eval_sv(sv, G_SCALAR);
137443ea 2095 SvREFCNT_dec(sv);
2096
2097 SPAGAIN;
2098 sv = POPs;
2099 PUTBACK;
2100
2d8e6c8d
GS		 2101 if (croak_on_error && SvTRUE(ERRSV)) {
2102 STRLEN n_a;
cea2e8a9 2103 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2104 }
137443ea 2105
2106 return sv;
2107}
2108
4633a7c4
LW		 2109/* Require a module. */
2110
954c1994 2111/*
ccfc67b7
JH		 2112=head1 Embedding Functions
2113
954c1994
GS		 2114=for apidoc p||require_pv
2115
7d3fb230
BS		 2116Tells Perl to C<require> the file named by the string argument. It is
2117analogous to the Perl code C<eval "require '$file'">. It's even
2118implemented that way; consider using Perl_load_module instead.
954c1994 2119
7d3fb230 2120=cut */
954c1994 2121
4633a7c4 2122void
864dbfa3 2123Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2124{
d3acc0f7
JP		 2125 SV* sv;
2126 dSP;
e788e7d3 2127 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP		 2128 PUTBACK;
2129 sv = sv_newmortal();
4633a7c4
LW		 2130 sv_setpv(sv, "require '");
2131 sv_catpv(sv, pv);
2132 sv_catpv(sv, "'");
864dbfa3 2133 eval_sv(sv, G_DISCARD);
d3acc0f7
JP		 2134 SPAGAIN;
2135 POPSTACK;
79072805
LW		 2136}
2137
79072805 2138void
864dbfa3 2139Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW		 2140{
2141 register GV *gv;
2142
155aba94 2143 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2144 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW		 2145}
2146
76e3520e 2147STATIC void
cea2e8a9 2148S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2149{
ab821d7f 2150 /* This message really ought to be max 23 lines.
75c72d73 2151 * Removed -h because the user already knows that option. Others? */
fb73857a 2152
76e3520e 2153 static char *usage_msg[] = {
fb73857a 2154"-0[octal] specify record separator (\\0, if no argument)",
2155"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2156"-C enable native wide character system interfaces",
1950ee41 2157"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS		 2158"-d[:debugger] run program under debugger",
2159"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2160"-e 'command' one line of program (several -e's allowed, omit programfile)",
2161"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2162"-i[extension] edit <> files in place (makes backup if extension supplied)",
2163"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2164"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS		 2165"-[mM][-]module execute `use/no module...' before executing program",
2166"-n assume 'while (<>) { ... }' loop around program",
2167"-p assume loop like -n but print line also, like sed",
2168"-P run program through C preprocessor before compilation",
2169"-s enable rudimentary parsing for switches after programfile",
2170"-S look for programfile using PATH environment variable",
2171"-T enable tainting checks",
2172"-u dump core after parsing program",
fb73857a 2173"-U allow unsafe operations",
aac3bd0d
GS		 2174"-v print version, subversion (includes VERY IMPORTANT perl info)",
2175"-V[:variable] print configuration summary (or a single Config.pm variable)",
2176"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS		 2177"-W enable all warnings",
2178"-X disable all warnings",
fb73857a 2179"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2180"\n",
2181NULL
2182};
76e3520e 2183 char **p = usage_msg;
fb73857a 2184
b0e47665
GS		 2185 PerlIO_printf(PerlIO_stdout(),
2186 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2187 name);
fb73857a 2188 while (*p)
b0e47665 2189 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW		 2190}
2191
79072805
LW		 2192/* This routine handles any switches that can be given during run */
2193
2194char *
864dbfa3 2195Perl_moreswitches(pTHX_ char *s)
79072805 2196{
ba210ebe 2197 STRLEN numlen;
c07a80fd 2198 U32 rschar;
79072805
LW		 2199
2200 switch (*s) {
2201 case '0':
a863c7d1 2202 {
53305cf1
NC		 2203 I32 flags = 0;
2204 numlen = 4;
2205 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
8bfdd7d9 2206 SvREFCNT_dec(PL_rs);
c07a80fd 2207 if (rschar & ~((U8)~0))
8bfdd7d9 2208 PL_rs = &PL_sv_undef;
c07a80fd 2209 else if (!rschar && numlen >= 2)
8bfdd7d9 2210 PL_rs = newSVpvn("", 0);
c07a80fd 2211 else {
2212 char ch = rschar;
8bfdd7d9 2213 PL_rs = newSVpvn(&ch, 1);
79072805
LW		 2214 }
2215 return s + numlen;
a863c7d1 2216 }
46487f74
GS		 2217 case 'C':
2218 PL_widesyscalls = TRUE;
2219 s++;
2220 return s;
2304df62 2221 case 'F':
3280af22 2222 PL_minus_F = TRUE;
ebce5377
RGS		 2223 PL_splitstr = ++s;
2224 while (*s && !isSPACE(*s)) ++s;
2225 *s = '\0';
2226 PL_splitstr = savepv(PL_splitstr);
2304df62 2227 return s;
79072805 2228 case 'a':
3280af22 2229 PL_minus_a = TRUE;
79072805
LW		 2230 s++;
2231 return s;
2232 case 'c':
3280af22 2233 PL_minus_c = TRUE;
79072805
LW		 2234 s++;
2235 return s;
2236 case 'd':
bbce6d69 2237 forbid_setid("-d");
4633a7c4 2238 s++;
70c94a19
RR		 2239 /* The following permits -d:Mod to accepts arguments following an =
2240 in the fashion that -MSome::Mod does. */
2241 if (*s == ':' || *s == '=') {
2242 char *start;
2243 SV *sv;
2244 sv = newSVpv("use Devel::", 0);
2245 start = ++s;
2246 /* We now allow -d:Module=Foo,Bar */
2247 while(isALNUM(*s) || *s==':') ++s;
2248 if (*s != '=')
2249 sv_catpv(sv, start);
2250 else {
2251 sv_catpvn(sv, start, s-start);
2252 sv_catpv(sv, " split(/,/,q{");
2253 sv_catpv(sv, ++s);
2254 sv_catpv(sv, "})");
2255 }
4633a7c4 2256 s += strlen(s);
70c94a19 2257 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2258 }
ed094faf 2259 if (!PL_perldb) {
3280af22 2260 PL_perldb = PERLDB_ALL;
a0d0e21e 2261 init_debugger();
ed094faf 2262 }
79072805
LW		 2263 return s;
2264 case 'D':
0453d815 2265 {
79072805 2266#ifdef DEBUGGING
bbce6d69 2267 forbid_setid("-D");
79072805 2268 if (isALPHA(s[1])) {
04932ac8
DM		 2269 /* if adding extra options, remember to update DEBUG_MASK */
2270 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW		 2271 char *d;
2272
93a17b20 2273 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2274 PL_debug |= 1 << (d - debopts);
79072805
LW		 2275 }
2276 else {
3280af22 2277 PL_debug = atoi(s+1);
79072805
LW		 2278 for (s++; isDIGIT(*s); s++) ;
2279 }
aea4f609 2280 PL_debug |= DEBUG_TOP_FLAG;
79072805 2281#else
0453d815
PM		 2282 if (ckWARN_d(WARN_DEBUGGING))
2283 Perl_warner(aTHX_ WARN_DEBUGGING,
2284 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2285 for (s++; isALNUM(*s); s++) ;
79072805
LW		 2286#endif
2287 /*SUPPRESS 530*/
2288 return s;
0453d815 2289 }
4633a7c4 2290 case 'h':
ac27b0f5 2291 usage(PL_origargv[0]);
6ad3d225 2292 PerlProc_exit(0);
79072805 2293 case 'i':
3280af22
NIS		 2294 if (PL_inplace)
2295 Safefree(PL_inplace);
2296 PL_inplace = savepv(s+1);
79072805 2297 /*SUPPRESS 530*/
3280af22 2298 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2299 if (*s) {
fb73857a 2300 *s++ = '\0';
7b8d334a
GS		 2301 if (*s == '-') /* Additional switches on #! line. */
2302 s++;
2303 }
fb73857a 2304 return s;
4e49a025 2305 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2306 forbid_setid("-I");
fb73857a 2307 ++s;
2308 while (*s && isSPACE(*s))
2309 ++s;
2310 if (*s) {
774d564b 2311 char *e, *p;
0df16ed7
GS		 2312 p = s;
2313 /* ignore trailing spaces (possibly followed by other switches) */
2314 do {
2315 for (e = p; *e && !isSPACE(*e); e++) ;
2316 p = e;
2317 while (isSPACE(*p))
2318 p++;
2319 } while (*p && *p != '-');
2320 e = savepvn(s, e-s);
9c8a64f0 2321 incpush(e, TRUE, TRUE);
0df16ed7
GS		 2322 Safefree(e);
2323 s = p;
2324 if (*s == '-')
2325 s++;
79072805
LW		 2326 }
2327 else
a67e862a 2328 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2329 return s;
79072805 2330 case 'l':
3280af22 2331 PL_minus_l = TRUE;
79072805 2332 s++;
7889fe52
NIS		 2333 if (PL_ors_sv) {
2334 SvREFCNT_dec(PL_ors_sv);
2335 PL_ors_sv = Nullsv;
2336 }
79072805 2337 if (isDIGIT(*s)) {
53305cf1 2338 I32 flags = 0;
7889fe52 2339 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC		 2340 numlen = 3 + (*s == '0');
2341 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW		 2342 s += numlen;
2343 }
2344 else {
8bfdd7d9 2345 if (RsPARA(PL_rs)) {
7889fe52
NIS		 2346 PL_ors_sv = newSVpvn("\n\n",2);
2347 }
2348 else {
8bfdd7d9 2349 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2350 }
79072805
LW		 2351 }
2352 return s;
1a30305b 2353 case 'M':
bbce6d69 2354 forbid_setid("-M"); /* XXX ? */
1a30305b 2355 /* FALL THROUGH */
2356 case 'm':
bbce6d69 2357 forbid_setid("-m"); /* XXX ? */
1a30305b 2358 if (*++s) {
a5f75d66 2359 char *start;
11343788 2360 SV *sv;
a5f75d66
AD		 2361 char *use = "use ";
2362 /* -M-foo == 'no foo' */
2363 if (*s == '-') { use = "no "; ++s; }
11343788 2364 sv = newSVpv(use,0);
a5f75d66 2365 start = s;
1a30305b 2366 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd 2367 while(isALNUM(*s) || *s==':') ++s;
2368 if (*s != '=') {
11343788 2369 sv_catpv(sv, start);
c07a80fd 2370 if (*(start-1) == 'm') {
2371 if (*s != '\0')
cea2e8a9 2372 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2373 sv_catpv( sv, " ()");
c07a80fd 2374 }
2375 } else {
6df41af2 2376 if (s == start)
be98fb35
GS		 2377 Perl_croak(aTHX_ "Module name required with -%c option",
2378 s[-1]);
11343788
MB		 2379 sv_catpvn(sv, start, s-start);
2380 sv_catpv(sv, " split(/,/,q{");
2381 sv_catpv(sv, ++s);
2382 sv_catpv(sv, "})");
c07a80fd 2383 }
1a30305b 2384 s += strlen(s);
5c831c24 2385 if (!PL_preambleav)
3280af22
NIS		 2386 PL_preambleav = newAV();
2387 av_push(PL_preambleav, sv);
1a30305b 2388 }
2389 else
cea2e8a9 2390 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2391 return s;
79072805 2392 case 'n':
3280af22 2393 PL_minus_n = TRUE;
79072805
LW		 2394 s++;
2395 return s;
2396 case 'p':
3280af22 2397 PL_minus_p = TRUE;
79072805
LW		 2398 s++;
2399 return s;
2400 case 's':
bbce6d69 2401 forbid_setid("-s");
3280af22 2402 PL_doswitches = TRUE;
79072805
LW		 2403 s++;
2404 return s;
6537fe72
MS		 2405 case 't':
2406 if (!PL_tainting)
2407 Perl_croak(aTHX_ "Too late for \"-t\" option");
2408 s++;
2409 return s;
463ee0b2 2410 case 'T':
3280af22 2411 if (!PL_tainting)
cea2e8a9 2412 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW		 2413 s++;
2414 return s;
79072805 2415 case 'u':
bf4acbe4
GS		 2416#ifdef MACOS_TRADITIONAL
2417 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2418#endif
3280af22 2419 PL_do_undump = TRUE;
79072805
LW		 2420 s++;
2421 return s;
2422 case 'U':
3280af22 2423 PL_unsafe = TRUE;
79072805
LW		 2424 s++;
2425 return s;
2426 case 'v':
8e9464f1 2427#if !defined(DGUX)
b0e47665 2428 PerlIO_printf(PerlIO_stdout(),
d2560b70 2429 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2430 PL_patchlevel, ARCHNAME));
8e9464f1
JH		 2431#else /* DGUX */
2432/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2433 PerlIO_printf(PerlIO_stdout(),
2434 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2435 PerlIO_printf(PerlIO_stdout(),
2436 Perl_form(aTHX_ " built under %s at %s %s\n",
2437 OSNAME, __DATE__, __TIME__));
2438 PerlIO_printf(PerlIO_stdout(),
2439 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2440 OSVERS));
8e9464f1
JH		 2441#endif /* !DGUX */
2442
fb73857a 2443#if defined(LOCAL_PATCH_COUNT)
2444 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS		 2445 PerlIO_printf(PerlIO_stdout(),
2446 "\n(with %d registered patch%s, "
2447 "see perl -V for more detail)",
2448 (int)LOCAL_PATCH_COUNT,
2449 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2450#endif
1a30305b 2451
b0e47665 2452 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2453 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH		 2454#ifdef MACOS_TRADITIONAL
2455 PerlIO_printf(PerlIO_stdout(),
03765510
JH		 2456 "\nMac OS port Copyright 1991-2001, Matthias Neeracher;\n"
2457 "maintained by Chris Nandor\n");
eae9c151 2458#endif
79072805 2459#ifdef MSDOS
b0e47665
GS		 2460 PerlIO_printf(PerlIO_stdout(),
2461 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff 2462#endif
2463#ifdef DJGPP
b0e47665
GS		 2464 PerlIO_printf(PerlIO_stdout(),
2465 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2466 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2467#endif
79072805 2468#ifdef OS2
b0e47665
GS		 2469 PerlIO_printf(PerlIO_stdout(),
2470 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2471 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2472#endif
79072805 2473#ifdef atarist
b0e47665
GS		 2474 PerlIO_printf(PerlIO_stdout(),
2475 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2476#endif
a3f9223b 2477#ifdef __BEOS__
b0e47665
GS		 2478 PerlIO_printf(PerlIO_stdout(),
2479 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2480#endif
1d84e8df 2481#ifdef MPE
b0e47665 2482 PerlIO_printf(PerlIO_stdout(),
dc22e1c4 2483 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2001\n");
1d84e8df 2484#endif
9d116dd7 2485#ifdef OEMVS
b0e47665
GS		 2486 PerlIO_printf(PerlIO_stdout(),
2487 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2488#endif
495c5fdc 2489#ifdef __VOS__
b0e47665
GS		 2490 PerlIO_printf(PerlIO_stdout(),
2491 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2492#endif
092bebab 2493#ifdef __OPEN_VM
b0e47665
GS		 2494 PerlIO_printf(PerlIO_stdout(),
2495 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2496#endif
a1a0e61e 2497#ifdef POSIX_BC
b0e47665
GS		 2498 PerlIO_printf(PerlIO_stdout(),
2499 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2500#endif
61ae2fbf 2501#ifdef __MINT__
b0e47665
GS		 2502 PerlIO_printf(PerlIO_stdout(),
2503 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2504#endif
f83d2536 2505#ifdef EPOC
b0e47665
GS		 2506 PerlIO_printf(PerlIO_stdout(),
2507 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2508#endif
e1caacb4
JH		 2509#ifdef UNDER_CE
2510 printf("WINCE port by Rainer Keuchel, 2001\n");
2511 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2512 wce_hitreturn();
2513#endif
baed7233
DL		 2514#ifdef BINARY_BUILD_NOTICE
2515 BINARY_BUILD_NOTICE;
2516#endif
b0e47665
GS		 2517 PerlIO_printf(PerlIO_stdout(),
2518 "\n\
79072805 2519Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2520GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS		 2521Complete documentation for Perl, including FAQ lists, should be found on\n\
2522this system using `man perl' or `perldoc perl'. If you have access to the\n\
2523Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2524 PerlProc_exit(0);
79072805 2525 case 'w':
599cee73 2526 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2527 PL_dowarn |= G_WARN_ON;
599cee73
PM		 2528 s++;
2529 return s;
2530 case 'W':
ac27b0f5 2531 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS		 2532 if (!specialWARN(PL_compiling.cop_warnings))
2533 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2534 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM		 2535 s++;
2536 return s;
2537 case 'X':
ac27b0f5 2538 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS		 2539 if (!specialWARN(PL_compiling.cop_warnings))
2540 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2541 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW		 2542 s++;
2543 return s;
a0d0e21e 2544 case '*':
79072805
LW		 2545 case ' ':
2546 if (s[1] == '-') /* Additional switches on #! line. */
2547 return s+2;
2548 break;
a0d0e21e 2549 case '-':
79072805 2550 case 0:
51882d45 2551#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS		 2552 case '\r':
2553#endif
79072805
LW		 2554 case '\n':
2555 case '\t':
2556 break;
aa689395 2557#ifdef ALTERNATE_SHEBANG
2558 case 'S': /* OS/2 needs -S on "extproc" line. */
2559 break;
2560#endif
a0d0e21e 2561 case 'P':
3280af22 2562 if (PL_preprocess)
a0d0e21e
LW		 2563 return s+1;
2564 /* FALL THROUGH */
79072805 2565 default:
cea2e8a9 2566 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW		 2567 }
2568 return Nullch;
2569}
2570
2571/* compliments of Tom Christiansen */
2572
2573/* unexec() can be found in the Gnu emacs distribution */
ee580363 2574/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW		 2575
2576void
864dbfa3 2577Perl_my_unexec(pTHX)
79072805
LW		 2578{
2579#ifdef UNEXEC
46fc3d4c 2580 SV* prog;
2581 SV* file;
ee580363 2582 int status = 1;
79072805
LW		 2583 extern int etext;
2584
ee580363 2585 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2586 sv_catpv(prog, "/perl");
6b88bc9c 2587 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2588 sv_catpv(file, ".perldump");
79072805 2589
ee580363
GS		 2590 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2591 /* unexec prints msg to stderr in case of failure */
6ad3d225 2592 PerlProc_exit(status);
79072805 2593#else
a5f75d66
AD		 2594# ifdef VMS
2595# include <lib$routines.h>
2596 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2597# else
79072805 2598 ABORT(); /* for use with undump */
aa689395 2599# endif
a5f75d66 2600#endif
79072805
LW		 2601}
2602
cb68f92d
GS		 2603/* initialize curinterp */
2604STATIC void
cea2e8a9 2605S_init_interp(pTHX)
cb68f92d
GS		 2606{
2607
acfe0abc
GS		 2608#ifdef MULTIPLICITY
2609# define PERLVAR(var,type)
2610# define PERLVARA(var,n,type)
2611# if defined(PERL_IMPLICIT_CONTEXT)
2612# if defined(USE_5005THREADS)
2613# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2614# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS		 2615# else /* !USE_5005THREADS */
2616# define PERLVARI(var,type,init) aTHX->var = init;
2617# define PERLVARIC(var,type,init) aTHX->var = init;
2618# endif /* USE_5005THREADS */
3967c732 2619# else
acfe0abc
GS		 2620# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2621# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2622# endif
acfe0abc
GS		 2623# include "intrpvar.h"
2624# ifndef USE_5005THREADS
2625# include "thrdvar.h"
2626# endif
2627# undef PERLVAR
2628# undef PERLVARA
2629# undef PERLVARI
2630# undef PERLVARIC
2631#else
2632# define PERLVAR(var,type)
2633# define PERLVARA(var,n,type)
2634# define PERLVARI(var,type,init) PL_##var = init;
2635# define PERLVARIC(var,type,init) PL_##var = init;
2636# include "intrpvar.h"
2637# ifndef USE_5005THREADS
2638# include "thrdvar.h"
2639# endif
2640# undef PERLVAR
2641# undef PERLVARA
2642# undef PERLVARI
2643# undef PERLVARIC
cb68f92d
GS		 2644#endif
2645
cb68f92d
GS		 2646}
2647
76e3520e 2648STATIC void
cea2e8a9 2649S_init_main_stash(pTHX)
79072805 2650{
463ee0b2 2651 GV *gv;
6e72f9df 2652
3d47000e 2653
ac27b0f5 2654
3280af22 2655 PL_curstash = PL_defstash = newHV();
79cb57f6 2656 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW		 2657 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2658 SvREFCNT_dec(GvHV(gv));
3280af22 2659 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2660 SvREADONLY_on(gv);
3280af22
NIS		 2661 HvNAME(PL_defstash) = savepv("main");
2662 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2663 GvMULTI_on(PL_incgv);
2664 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2665 GvMULTI_on(PL_hintgv);
2666 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2667 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2668 GvMULTI_on(PL_errgv);
2669 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2670 GvMULTI_on(PL_replgv);
cea2e8a9 2671 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB		 2672 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2673 sv_setpvn(ERRSV, "", 0);
3280af22 2674 PL_curstash = PL_defstash;
11faa288 2675 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2676 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2677 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2678 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2679 /* We must init $/ before switches are processed. */
864dbfa3 2680 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW		 2681}
2682
76e3520e 2683STATIC void
cea2e8a9 2684S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2685{
1b24ed4b
MS		 2686 char *quote;
2687 char *code;
2688 char *cpp_discard_flag;
2689 char *perl;
2690
6c4ab083 2691 *fdscript = -1;
79072805 2692
3280af22
NIS		 2693 if (PL_e_script) {
2694 PL_origfilename = savepv("-e");
96436eeb 2695 }
6c4ab083
GS		 2696 else {
2697 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2698 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS		 2699
2700 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2701 char *s = scriptname + 8;
2702 *fdscript = atoi(s);
2703 while (isDIGIT(*s))
2704 s++;
2705 if (*s) {
2706 scriptname = savepv(s + 1);
3280af22
NIS		 2707 Safefree(PL_origfilename);
2708 PL_origfilename = scriptname;
6c4ab083
GS		 2709 }
2710 }
2711 }
2712
05ec9bb3 2713 CopFILE_free(PL_curcop);
57843af0 2714 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2715 if (strEQ(PL_origfilename,"-"))
79072805 2716 scriptname = "";
01f988be 2717 if (*fdscript >= 0) {
3280af22 2718 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS		 2719# if defined(HAS_FCNTL) && defined(F_SETFD)
2720 if (PL_rsfp)
2721 /* ensure close-on-exec */
2722 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2723# endif
96436eeb 2724 }
3280af22 2725 else if (PL_preprocess) {
46fc3d4c 2726 char *cpp_cfg = CPPSTDIN;
79cb57f6 2727 SV *cpp = newSVpvn("",0);
46fc3d4c 2728 SV *cmd = NEWSV(0,0);
2729
2730 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2731 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2732 sv_catpv(cpp, cpp_cfg);
79072805 2733
1b24ed4b
MS		 2734# ifndef VMS
2735 sv_catpvn(sv, "-I", 2);
2736 sv_catpv(sv,PRIVLIB_EXP);
2737# endif
46fc3d4c 2738
14953ddc
MB		 2739 DEBUG_P(PerlIO_printf(Perl_debug_log,
2740 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2741 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS		 2742
2743# if defined(MSDOS) || defined(WIN32) || defined(VMS)
2744 quote = "\"";
2745# else
2746 quote = "'";
2747# endif
2748
2749# ifdef VMS
2750 cpp_discard_flag = "";
2751# else
2752 cpp_discard_flag = "-C";
2753# endif
2754
2755# ifdef OS2
2756 perl = os2_execname(aTHX);
2757# else
2758 perl = PL_origargv[0];
2759# endif
2760
2761
2762 /* This strips off Perl comments which might interfere with
2763 the C pre-processor, including #!. #line directives are
2764 deliberately stripped to avoid confusion with Perl's version
2765 of #line. FWP played some golf with it so it will fit
2766 into VMS's 255 character buffer.
2767 */
2768 if( PL_doextract )
2769 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2770 else
2771 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2772
2773 Perl_sv_setpvf(aTHX_ cmd, "\
2774%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
2775 perl, quote, code, quote, scriptname, cpp,
2776 cpp_discard_flag, sv, CPPMINUS);
2777
3280af22 2778 PL_doextract = FALSE;
1b24ed4b
MS		 2779# ifdef IAMSUID /* actually, this is caught earlier */
2780 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2781# ifdef HAS_SETEUID
2782 (void)seteuid(PL_uid); /* musn't stay setuid root */
2783# else
2784# ifdef HAS_SETREUID
2785 (void)setreuid((Uid_t)-1, PL_uid);
2786# else
2787# ifdef HAS_SETRESUID
2788 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2789# else
2790 PerlProc_setuid(PL_uid);
2791# endif
2792# endif
2793# endif
b28d0864 2794 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2795 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805 2796 }
1b24ed4b 2797# endif /* IAMSUID */
0a6c758d 2798
1b24ed4b
MS		 2799 DEBUG_P(PerlIO_printf(Perl_debug_log,
2800 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS		 2801 SvPVX(cmd)));
2802
3280af22 2803 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c 2804 SvREFCNT_dec(cmd);
2805 SvREFCNT_dec(cpp);
79072805
LW		 2806 }
2807 else if (!*scriptname) {
bbce6d69 2808 forbid_setid("program input from stdin");
3280af22 2809 PL_rsfp = PerlIO_stdin();
79072805 2810 }
96436eeb 2811 else {
3280af22 2812 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS		 2813# if defined(HAS_FCNTL) && defined(F_SETFD)
2814 if (PL_rsfp)
2815 /* ensure close-on-exec */
2816 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2817# endif
96436eeb 2818 }
3280af22 2819 if (!PL_rsfp) {
1b24ed4b
MS		 2820# ifdef DOSUID
2821# ifndef IAMSUID /* in case script is not readable before setuid */
2822 if (PL_euid &&
2823 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
2824 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2825 {
2826 /* try again */
2827 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT,
2828 BIN_EXP, (int)PERL_REVISION,
2829 (int)PERL_VERSION,
2830 (int)PERL_SUBVERSION), PL_origargv);
2831 Perl_croak(aTHX_ "Can't do setuid\n");
2832 }
2833# endif
2834# endif
2835# ifdef IAMSUID
2836 errno = EPERM;
2837 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2838 Strerror(errno));
2839# else
2840 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
2841 CopFILE(PL_curcop), Strerror(errno));
2842# endif
13281fa4 2843 }
79072805 2844}
8d063cd8 2845
7b89560d
JH		 2846/* Mention
2847 * I_SYSSTATVFS HAS_FSTATVFS
2848 * I_SYSMOUNT
c890dc6c 2849 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH		 2850 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2851 * here so that metaconfig picks them up. */
2852
104d25b7 2853#ifdef IAMSUID
864dbfa3 2854STATIC int
e688b231 2855S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2856{
0545a864
JH		 2857 int check_okay = 0; /* able to do all the required sys/libcalls */
2858 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2859/*
ad27e871 2860 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2861 * fstatvfs() is UNIX98.
0545a864 2862 * fstatfs() is 4.3 BSD.
ad27e871 2863 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH		 2864 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2865 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH		 2866 */
2867
6439433f
JH		 2868#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2869
2870# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2871 defined(HAS_FSTATVFS)
2872# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2873 struct statvfs stfs;
6439433f 2874
104d25b7
JH		 2875 check_okay = fstatvfs(fd, &stfs) == 0;
2876 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2877# endif /* fstatvfs */
ac27b0f5 2878
6439433f
JH		 2879# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2880 defined(PERL_MOUNT_NOSUID) && \
2881 defined(HAS_FSTATFS) && \
2882 defined(HAS_STRUCT_STATFS) && \
2883 defined(HAS_STRUCT_STATFS_F_FLAGS)
2884# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2885 struct statfs stfs;
6439433f 2886
104d25b7 2887 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2888 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH		 2889# endif /* fstatfs */
2890
2891# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2892 defined(PERL_MOUNT_NOSUID) && \
2893 defined(HAS_FSTAT) && \
2894 defined(HAS_USTAT) && \
2895 defined(HAS_GETMNT) && \
2896 defined(HAS_STRUCT_FS_DATA) && \
2897 defined(NOSTAT_ONE)
2898# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2899 struct stat fdst;
6439433f 2900
0545a864 2901 if (fstat(fd, &fdst) == 0) {
6439433f
JH		 2902 struct ustat us;
2903 if (ustat(fdst.st_dev, &us) == 0) {
2904 struct fs_data fsd;
2905 /* NOSTAT_ONE here because we're not examining fields which
2906 * vary between that case and STAT_ONE. */
ad27e871 2907 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH		 2908 size_t cmplen = sizeof(us.f_fname);
2909 if (sizeof(fsd.fd_req.path) < cmplen)
2910 cmplen = sizeof(fsd.fd_req.path);
2911 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2912 fdst.st_dev == fsd.fd_req.dev) {
2913 check_okay = 1;
2914 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2915 }
2916 }
2917 }
2918 }
0545a864 2919 }
6439433f
JH		 2920# endif /* fstat+ustat+getmnt */
2921
2922# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2923 defined(HAS_GETMNTENT) && \
2924 defined(HAS_HASMNTOPT) && \
2925 defined(MNTOPT_NOSUID)
2926# define FD_ON_NOSUID_CHECK_OKAY
2927 FILE *mtab = fopen("/etc/mtab", "r");
2928 struct mntent *entry;
2929 struct stat stb, fsb;
104d25b7
JH		 2930
2931 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH		 2932 while (entry = getmntent(mtab)) {
2933 if (stat(entry->mnt_dir, &fsb) == 0
2934 && fsb.st_dev == stb.st_dev)
2935 {
2936 /* found the filesystem */
2937 check_okay = 1;
2938 if (hasmntopt(entry, MNTOPT_NOSUID))
2939 on_nosuid = 1;
2940 break;
2941 } /* A single fs may well fail its stat(). */
2942 }
104d25b7
JH		 2943 }
2944 if (mtab)
6439433f
JH		 2945 fclose(mtab);
2946# endif /* getmntent+hasmntopt */
0545a864 2947
ac27b0f5 2948 if (!check_okay)
0545a864 2949 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH		 2950 return on_nosuid;
2951}
2952#endif /* IAMSUID */
2953
76e3520e 2954STATIC void
cea2e8a9 2955S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2956{
155aba94 2957#ifdef IAMSUID
96436eeb 2958 int which;
155aba94 2959#endif
96436eeb 2960
13281fa4
LW		 2961 /* do we need to emulate setuid on scripts? */
2962
2963 /* This code is for those BSD systems that have setuid #! scripts disabled
2964 * in the kernel because of a security problem. Merely defining DOSUID
2965 * in perl will not fix that problem, but if you have disabled setuid
2966 * scripts in the kernel, this will attempt to emulate setuid and setgid
2967 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW		 2968 * root version must be called suidperl or sperlN.NNN. If regular perl
2969 * discovers that it has opened a setuid script, it calls suidperl with
2970 * the same argv that it had. If suidperl finds that the script it has
2971 * just opened is NOT setuid root, it sets the effective uid back to the
2972 * uid. We don't just make perl setuid root because that loses the
2973 * effective uid we had before invoking perl, if it was different from the
2974 * uid.
13281fa4
LW		 2975 *
2976 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2977 * be defined in suidperl only. suidperl must be setuid root. The
2978 * Configure script will set this up for you if you want it.
2979 */
a687059c 2980
13281fa4 2981#ifdef DOSUID
6e72f9df 2982 char *s, *s2;
a0d0e21e 2983
b28d0864 2984 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2985 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2986 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2987 I32 len;
2d8e6c8d 2988 STRLEN n_a;
13281fa4 2989
a687059c 2990#ifdef IAMSUID
fe14fcc3 2991#ifndef HAS_SETREUID
a687059c
LW		 2992 /* On this access check to make sure the directories are readable,
2993 * there is actually a small window that the user could use to make
2994 * filename point to an accessible directory. So there is a faint
2995 * chance that someone could execute a setuid script down in a
2996 * non-accessible directory. I don't know what to do about that.
2997 * But I don't think it's too important. The manual lies when
2998 * it says access() is useful in setuid programs.
2999 */
cc49e20b 3000 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 3001 Perl_croak(aTHX_ "Permission denied");
a687059c
LW		 3002#else
3003 /* If we can swap euid and uid, then we can determine access rights
3004 * with a simple stat of the file, and then compare device and
3005 * inode to make sure we did stat() on the same file we opened.
3006 * Then we just have to make sure he or she can execute it.
3007 */
3008 {
3009 struct stat tmpstatbuf;
3010
85e6fe83
LW		 3011 if (
3012#ifdef HAS_SETREUID
b28d0864 3013 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW		 3014#else
3015# if HAS_SETRESUID
b28d0864 3016 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 3017# endif
85e6fe83 3018#endif
b28d0864 3019 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 3020 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 3021 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 3022 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 3023#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 3024 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 3025 Perl_croak(aTHX_ "Permission denied");
104d25b7 3026#endif
b28d0864
NIS		 3027 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3028 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3029 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3030 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3031 }
85e6fe83
LW		 3032 if (
3033#ifdef HAS_SETREUID
b28d0864 3034 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW		 3035#else
3036# if defined(HAS_SETRESUID)
b28d0864 3037 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3038# endif
85e6fe83 3039#endif
b28d0864 3040 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3041 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3042 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3043 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3044 }
fe14fcc3 3045#endif /* HAS_SETREUID */
a687059c
LW		 3046#endif /* IAMSUID */
3047
b28d0864 3048 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3049 Perl_croak(aTHX_ "Permission denied");
b28d0864 3050 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3051 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3052 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3053 CopLINE_inc(PL_curcop);
6b88bc9c 3054 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3055 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3056 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3057 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3058 if (*s == ' ') s++;
45d8adaa 3059 while (!isSPACE(*s)) s++;
2d8e6c8d 3060 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df 3061 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3062 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3063 Perl_croak(aTHX_ "Not a perl script");
a687059c 3064 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW		 3065 /*
3066 * #! arg must be what we saw above. They can invoke it by
3067 * mentioning suidperl explicitly, but they may not add any strange
3068 * arguments beyond what #! says if they do invoke suidperl that way.
3069 */
3070 len = strlen(validarg);
3071 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3072 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3073 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW		 3074
3075#ifndef IAMSUID
b28d0864
NIS		 3076 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3077 PL_euid == PL_statbuf.st_uid)
3078 if (!PL_do_undump)
cea2e8a9 3079 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3080FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3081#endif /* IAMSUID */
13281fa4 3082
b28d0864
NIS		 3083 if (PL_euid) { /* oops, we're not the setuid root perl */
3084 (void)PerlIO_close(PL_rsfp);
13281fa4 3085#ifndef IAMSUID
46fc3d4c 3086 /* try again */
a7cb1f99 3087 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3088 (int)PERL_REVISION, (int)PERL_VERSION,
3089 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3090#endif
cea2e8a9 3091 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 3092 }
3093
b28d0864 3094 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3095#ifdef HAS_SETEGID
b28d0864 3096 (void)setegid(PL_statbuf.st_gid);
a687059c 3097#else
fe14fcc3 3098#ifdef HAS_SETREGID
b28d0864 3099 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW		 3100#else
3101#ifdef HAS_SETRESGID
b28d0864 3102 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3103#else
b28d0864 3104 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW		 3105#endif
3106#endif
85e6fe83 3107#endif
b28d0864 3108 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3109 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3110 }
b28d0864
NIS		 3111 if (PL_statbuf.st_mode & S_ISUID) {
3112 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3113#ifdef HAS_SETEUID
b28d0864 3114 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3115#else
fe14fcc3 3116#ifdef HAS_SETREUID
b28d0864 3117 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW		 3118#else
3119#ifdef HAS_SETRESUID
b28d0864 3120 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3121#else
b28d0864 3122 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW		 3123#endif
3124#endif
85e6fe83 3125#endif
b28d0864 3126 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3127 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3128 }
b28d0864 3129 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3130#ifdef HAS_SETEUID
b28d0864 3131 (void)seteuid((Uid_t)PL_uid);
a687059c 3132#else
fe14fcc3 3133#ifdef HAS_SETREUID
b28d0864 3134 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3135#else
85e6fe83 3136#ifdef HAS_SETRESUID
b28d0864 3137 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3138#else
b28d0864 3139 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3140#endif
a687059c
LW		 3141#endif
3142#endif
b28d0864 3143 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3144 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3145 }
748a9306 3146 init_ids();
b28d0864 3147 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3148 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW		 3149 }
3150#ifdef IAMSUID
6b88bc9c 3151 else if (PL_preprocess)
cea2e8a9 3152 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3153 else if (fdscript >= 0)
cea2e8a9 3154 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3155 else
cea2e8a9 3156 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb 3157
3158 /* We absolutely must clear out any saved ids here, so we */
3159 /* exec the real perl, substituting fd script for scriptname. */
3160 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS		 3161 PerlIO_rewind(PL_rsfp);
3162 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS		 3163 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3164 if (!PL_origargv[which])
cea2e8a9
GS		 3165 Perl_croak(aTHX_ "Permission denied");
3166 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3167 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3168#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3169 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3170#endif
a7cb1f99 3171 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3172 (int)PERL_REVISION, (int)PERL_VERSION,
3173 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3174 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3175#endif /* IAMSUID */
a687059c 3176#else /* !DOSUID */
3280af22 3177 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3178#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS		 3179 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3180 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3181 ||
b28d0864 3182 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3183 )
b28d0864 3184 if (!PL_do_undump)
cea2e8a9 3185 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3186FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3187#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3188 /* not set-id, must be wrapped */
a687059c 3189 }
13281fa4 3190#endif /* DOSUID */
79072805 3191}
13281fa4 3192
76e3520e 3193STATIC void
cea2e8a9 3194S_find_beginning(pTHX)
79072805 3195{
6e72f9df 3196 register char *s, *s2;
33b78306
LW		 3197
3198 /* skip forward in input to the real script? */
3199
bbce6d69 3200 forbid_setid("-x");
bf4acbe4 3201#ifdef MACOS_TRADITIONAL
084592ab 3202 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3203
bf4acbe4
GS		 3204 while (PL_doextract || gMacPerl_AlwaysExtract) {
3205 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3206 if (!gMacPerl_AlwaysExtract)
3207 Perl_croak(aTHX_ "No Perl script found in input\n");
3208
3209 if (PL_doextract) /* require explicit override ? */
3210 if (!OverrideExtract(PL_origfilename))
3211 Perl_croak(aTHX_ "User aborted script\n");
3212 else
3213 PL_doextract = FALSE;
3214
3215 /* Pater peccavi, file does not have #! */
3216 PerlIO_rewind(PL_rsfp);
ac27b0f5 3217
bf4acbe4
GS		 3218 break;
3219 }
3220#else
3280af22
NIS		 3221 while (PL_doextract) {
3222 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3223 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3224#endif
4f0c37ba
IZ		 3225 s2 = s;
3226 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS		 3227 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3228 PL_doextract = FALSE;
6e72f9df 3229 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3230 s2 = s;
3231 while (*s == ' ' || *s == '\t') s++;
3232 if (*s++ == '-') {
3233 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3234 if (strnEQ(s2-4,"perl",4))
3235 /*SUPPRESS 530*/
155aba94
GS		 3236 while ((s = moreswitches(s)))
3237 ;
33b78306 3238 }
95e8664e
CN		 3239#ifdef MACOS_TRADITIONAL
3240 break;
3241#endif
83025b21
LW		 3242 }
3243 }
3244}
3245
afe37c7d 3246
76e3520e 3247STATIC void
cea2e8a9 3248S_init_ids(pTHX)
352d5a3a 3249{
d8eceb89
JH		 3250 PL_uid = PerlProc_getuid();
3251 PL_euid = PerlProc_geteuid();
3252 PL_gid = PerlProc_getgid();
3253 PL_egid = PerlProc_getegid();
748a9306 3254#ifdef VMS
b28d0864
NIS		 3255 PL_uid |= PL_gid << 16;
3256 PL_euid |= PL_egid << 16;
748a9306 3257#endif
3280af22 3258 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3259}
79072805 3260
76e3520e 3261STATIC void
cea2e8a9 3262S_forbid_setid(pTHX_ char *s)
bbce6d69 3263{
3280af22 3264 if (PL_euid != PL_uid)
cea2e8a9 3265 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3266 if (PL_egid != PL_gid)
cea2e8a9 3267 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69 3268}
3269
1ee4443e
IZ		 3270void
3271Perl_init_debugger(pTHX)
748a9306 3272{
1ee4443e
IZ		 3273 HV *ostash = PL_curstash;
3274
3280af22
NIS		 3275 PL_curstash = PL_debstash;
3276 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3277 AvREAL_off(PL_dbargs);
3278 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3279 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3280 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3281 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3282 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3283 sv_setiv(PL_DBsingle, 0);
3280af22 3284 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3285 sv_setiv(PL_DBtrace, 0);
3280af22 3286 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3287 sv_setiv(PL_DBsignal, 0);
1ee4443e 3288 PL_curstash = ostash;
352d5a3a
LW		 3289}
3290
2ce36478
SM		 3291#ifndef STRESS_REALLOC
3292#define REASONABLE(size) (size)
3293#else
3294#define REASONABLE(size) (1) /* unreasonable */
3295#endif
3296
11343788 3297void
cea2e8a9 3298Perl_init_stacks(pTHX)
79072805 3299{
e336de0d 3300 /* start with 128-item stack and 8K cxstack */
3280af22 3301 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3302 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS		 3303 PL_curstackinfo->si_type = PERLSI_MAIN;
3304 PL_curstack = PL_curstackinfo->si_stack;
3305 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3306
3280af22
NIS		 3307 PL_stack_base = AvARRAY(PL_curstack);
3308 PL_stack_sp = PL_stack_base;
3309 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3310
3280af22
NIS		 3311 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3312 PL_tmps_floor = -1;
3313 PL_tmps_ix = -1;
3314 PL_tmps_max = REASONABLE(128);
8990e307 3315
3280af22
NIS		 3316 New(54,PL_markstack,REASONABLE(32),I32);
3317 PL_markstack_ptr = PL_markstack;
3318 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3319
ce2f7c3b 3320 SET_MARK_OFFSET;
e336de0d 3321
3280af22
NIS		 3322 New(54,PL_scopestack,REASONABLE(32),I32);
3323 PL_scopestack_ix = 0;
3324 PL_scopestack_max = REASONABLE(32);
79072805 3325
3280af22
NIS		 3326 New(54,PL_savestack,REASONABLE(128),ANY);
3327 PL_savestack_ix = 0;
3328 PL_savestack_max = REASONABLE(128);
79072805 3329
3280af22
NIS		 3330 New(54,PL_retstack,REASONABLE(16),OP*);
3331 PL_retstack_ix = 0;
3332 PL_retstack_max = REASONABLE(16);
378cc40b 3333}
33b78306 3334
2ce36478
SM		 3335#undef REASONABLE
3336
76e3520e 3337STATIC void
cea2e8a9 3338S_nuke_stacks(pTHX)
6e72f9df 3339{
3280af22
NIS		 3340 while (PL_curstackinfo->si_next)
3341 PL_curstackinfo = PL_curstackinfo->si_next;
3342 while (PL_curstackinfo) {
3343 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3344 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS		 3345 Safefree(PL_curstackinfo->si_cxstack);
3346 Safefree(PL_curstackinfo);
3347 PL_curstackinfo = p;
e336de0d 3348 }
3280af22
NIS		 3349 Safefree(PL_tmps_stack);
3350 Safefree(PL_markstack);
3351 Safefree(PL_scopestack);
3352 Safefree(PL_savestack);
3353 Safefree(PL_retstack);
378cc40b 3354}
33b78306 3355
76e3520e 3356STATIC void
cea2e8a9 3357S_init_lexer(pTHX)
8990e307 3358{
06039172 3359 PerlIO *tmpfp;
3280af22
NIS		 3360 tmpfp = PL_rsfp;
3361 PL_rsfp = Nullfp;
3362 lex_start(PL_linestr);
3363 PL_rsfp = tmpfp;
79cb57f6 3364 PL_subname = newSVpvn("main",4);
8990e307
LW		 3365}
3366
76e3520e 3367STATIC void
cea2e8a9 3368S_init_predump_symbols(pTHX)
45d8adaa 3369{
93a17b20 3370 GV *tmpgv;
af8c498a 3371 IO *io;
79072805 3372
864dbfa3 3373 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS		 3374 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3375 GvMULTI_on(PL_stdingv);
af8c498a 3376 io = GvIOp(PL_stdingv);
a04651f4 3377 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3378 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3379 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3380 GvMULTI_on(tmpgv);
af8c498a 3381 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3382
85e6fe83 3383 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3384 GvMULTI_on(tmpgv);
af8c498a 3385 io = GvIOp(tmpgv);
a04651f4 3386 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3387 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3388 setdefout(tmpgv);
adbc6bb1 3389 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3390 GvMULTI_on(tmpgv);
af8c498a 3391 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3392
bf49b057
GS		 3393 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3394 GvMULTI_on(PL_stderrgv);
3395 io = GvIOp(PL_stderrgv);
a04651f4 3396 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3397 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3398 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3399 GvMULTI_on(tmpgv);
af8c498a 3400 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3401
3280af22 3402 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3403
bf4acbe4
GS		 3404 if (PL_osname)
3405 Safefree(PL_osname);
3406 PL_osname = savepv(OSNAME);
79072805 3407}
33b78306 3408
a11ec5a9
RGS		 3409void
3410Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
33b78306 3411{
79072805 3412 char *s;
79072805 3413 argc--,argv++; /* skip name of script */
3280af22 3414 if (PL_doswitches) {
79072805
LW		 3415 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3416 if (!argv[0][1])
3417 break;
379d538a 3418 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW		 3419 argc--,argv++;
3420 break;
3421 }
155aba94 3422 if ((s = strchr(argv[0], '='))) {
79072805 3423 *s++ = '\0';
85e6fe83 3424 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW		 3425 }
3426 else
85e6fe83 3427 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3428 }
79072805 3429 }
a11ec5a9
RGS		 3430 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3431 GvMULTI_on(PL_argvgv);
3432 (void)gv_AVadd(PL_argvgv);
3433 av_clear(GvAVn(PL_argvgv));
3434 for (; argc > 0; argc--,argv++) {
3435 SV *sv = newSVpv(argv[0],0);
3436 av_push(GvAVn(PL_argvgv),sv);
3437 if (PL_widesyscalls)
3438 (void)sv_utf8_decode(sv);
3439 }
3440 }
3441}
3442
04fee9b5
NIS		 3443#ifdef HAS_PROCSELFEXE
3444/* This is a function so that we don't hold on to MAXPATHLEN
8338e367 3445 bytes of stack longer than necessary
04fee9b5
NIS		 3446 */
3447STATIC void
3448S_procself_val(pTHX_ SV *sv, char *arg0)
3449{
3450 char buf[MAXPATHLEN];
d13a6521 3451 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
04fee9b5
NIS		 3452 if (len > 0) {
3453 sv_setpvn(sv,buf,len);
3454 }
3455 else {
3456 sv_setpv(sv,arg0);
3457 }
3458}
3459#endif /* HAS_PROCSELFEXE */
3460
a11ec5a9
RGS		 3461STATIC void
3462S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3463{
3464 char *s;
3465 SV *sv;
3466 GV* tmpgv;
a11ec5a9 3467
3280af22
NIS		 3468 PL_toptarget = NEWSV(0,0);
3469 sv_upgrade(PL_toptarget, SVt_PVFM);
3470 sv_setpvn(PL_toptarget, "", 0);
3471 PL_bodytarget = NEWSV(0,0);
3472 sv_upgrade(PL_bodytarget, SVt_PVFM);
3473 sv_setpvn(PL_bodytarget, "", 0);
3474 PL_formtarget = PL_bodytarget;
79072805 3475
bbce6d69 3476 TAINT;
a11ec5a9
RGS		 3477
3478 init_argv_symbols(argc,argv);
3479
155aba94 3480 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS		 3481#ifdef MACOS_TRADITIONAL
3482 /* $0 is not majick on a Mac */
3483 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3484#else
3280af22 3485 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3486<