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[perl5.git] / perl.c
CommitLineData
a0d0e21e
LW		 1/* perl.c
2 *
bc89e66f 3 * Copyright (c) 1987-2001 Larry Wall
a687059c 4 *
352d5a3a
LW		 5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
a687059c 7 *
8d063cd8
LW		 8 */
9
a0d0e21e
LW		 10/*
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
12 */
45d8adaa 13
378cc40b 14#include "EXTERN.h"
864dbfa3 15#define PERL_IN_PERL_C
378cc40b 16#include "perl.h"
e3321bb0 17#include "patchlevel.h" /* for local_patches */
378cc40b 18
df5cef82 19/* XXX If this causes problems, set i_unistd=undef in the hint file. */
a0d0e21e
LW		 20#ifdef I_UNISTD
21#include <unistd.h>
22#endif
a0d0e21e 23
54310121 24#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
20ce7b12 25char *getenv (char *); /* Usually in <stdlib.h> */
54310121 26#endif
27
0cb96387
GS		 28static I32 read_e_script(pTHXo_ int idx, SV *buf_sv, int maxlen);
29
a687059c
LW		 30#ifdef IAMSUID
31#ifndef DOSUID
32#define DOSUID
33#endif
34#endif
378cc40b 35
a687059c
LW		 36#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
37#ifdef DOSUID
38#undef DOSUID
39#endif
40#endif
8d063cd8 41
873ef191 42#ifdef PERL_OBJECT
7766f137
GS		 43#define perl_construct Perl_construct
44#define perl_parse Perl_parse
45#define perl_run Perl_run
46#define perl_destruct Perl_destruct
47#define perl_free Perl_free
48#endif
32e30700 49
06d86050
GS		 50#if defined(USE_THREADS)
51# define INIT_TLS_AND_INTERP \
52 STMT_START { \
53 if (!PL_curinterp) { \
54 PERL_SET_INTERP(my_perl); \
55 INIT_THREADS; \
56 ALLOC_THREAD_KEY; \
57 } \
58 } STMT_END
59#else
60# if defined(USE_ITHREADS)
61# define INIT_TLS_AND_INTERP \
62 STMT_START { \
63 if (!PL_curinterp) { \
64 PERL_SET_INTERP(my_perl); \
65 INIT_THREADS; \
66 ALLOC_THREAD_KEY; \
534825c4
GS		 67 PERL_SET_THX(my_perl); \
68 OP_REFCNT_INIT; \
69 } \
70 else { \
71 PERL_SET_THX(my_perl); \
06d86050 72 } \
06d86050
GS		 73 } STMT_END
74# else
75# define INIT_TLS_AND_INTERP \
76 STMT_START { \
77 if (!PL_curinterp) { \
78 PERL_SET_INTERP(my_perl); \
79 } \
80 PERL_SET_THX(my_perl); \
81 } STMT_END
82# endif
83#endif
84
32e30700
GS		 85#ifdef PERL_IMPLICIT_SYS
86PerlInterpreter *
7766f137
GS		 87perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
88 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
32e30700
GS		 89 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
90 struct IPerlDir* ipD, struct IPerlSock* ipS,
91 struct IPerlProc* ipP)
92{
93 PerlInterpreter *my_perl;
7766f137
GS		 94#ifdef PERL_OBJECT
95 my_perl = (PerlInterpreter*)new(ipM) CPerlObj(ipM, ipMS, ipMP, ipE, ipStd,
96 ipLIO, ipD, ipS, ipP);
06d86050 97 INIT_TLS_AND_INTERP;
7766f137 98#else
32e30700
GS		 99 /* New() needs interpreter, so call malloc() instead */
100 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 101 INIT_TLS_AND_INTERP;
32e30700
GS		 102 Zero(my_perl, 1, PerlInterpreter);
103 PL_Mem = ipM;
7766f137
GS		 104 PL_MemShared = ipMS;
105 PL_MemParse = ipMP;
32e30700
GS		 106 PL_Env = ipE;
107 PL_StdIO = ipStd;
108 PL_LIO = ipLIO;
109 PL_Dir = ipD;
110 PL_Sock = ipS;
111 PL_Proc = ipP;
7766f137
GS		 112#endif
113
32e30700
GS		 114 return my_perl;
115}
116#else
954c1994
GS		 117
118/*
119=for apidoc perl_alloc
120
121Allocates a new Perl interpreter. See L<perlembed>.
122
123=cut
124*/
125
93a17b20 126PerlInterpreter *
cea2e8a9 127perl_alloc(void)
79072805 128{
cea2e8a9 129 PerlInterpreter *my_perl;
79072805 130
54aff467 131 /* New() needs interpreter, so call malloc() instead */
e8ee3774 132 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 133
06d86050 134 INIT_TLS_AND_INTERP;
dedcbb81 135 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 136 return my_perl;
79072805 137}
32e30700 138#endif /* PERL_IMPLICIT_SYS */
79072805 139
954c1994
GS		 140/*
141=for apidoc perl_construct
142
143Initializes a new Perl interpreter. See L<perlembed>.
144
145=cut
146*/
147
79072805 148void
0cb96387 149perl_construct(pTHXx)
79072805 150{
a863c7d1 151#ifdef USE_THREADS
a863c7d1 152#ifndef FAKE_THREADS
e1f15930 153 struct perl_thread *thr = NULL;
a863c7d1
MB		 154#endif /* FAKE_THREADS */
155#endif /* USE_THREADS */
ba869deb 156
8990e307 157#ifdef MULTIPLICITY
54aff467 158 init_interp();
ac27b0f5 159 PL_perl_destruct_level = 1;
54aff467
GS		 160#else
161 if (PL_perl_destruct_level > 0)
162 init_interp();
163#endif
164
33f46ff6 165 /* Init the real globals (and main thread)? */
3280af22 166 if (!PL_linestr) {
1feb2720 167#ifdef USE_THREADS
533c011a 168 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB		 169 /*
170 * Safe to use basic SV functions from now on (though
171 * not things like mortals or tainting yet).
172 */
533c011a
NIS		 173 MUTEX_INIT(&PL_eval_mutex);
174 COND_INIT(&PL_eval_cond);
175 MUTEX_INIT(&PL_threads_mutex);
176 COND_INIT(&PL_nthreads_cond);
ba869deb 177# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 178 MUTEX_INIT(&PL_svref_mutex);
ba869deb 179# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 180
5ff3f7a4 181 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS		 182 MUTEX_INIT(&PL_sv_lock_mutex);
183 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 184
199100c8 185 thr = init_main_thread();
11343788
MB		 186#endif /* USE_THREADS */
187
14dd3ad8 188#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 189 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 190#endif
312caa8e 191
2aea9f8a
GS		 192 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
193
3280af22
NIS		 194 PL_linestr = NEWSV(65,79);
195 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 196
3280af22 197 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP		 198 /* set read-only and try to insure than we wont see REFCNT==0
199 very often */
200
3280af22
NIS		 201 SvREADONLY_on(&PL_sv_undef);
202 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 203
3280af22
NIS		 204 sv_setpv(&PL_sv_no,PL_No);
205 SvNV(&PL_sv_no);
206 SvREADONLY_on(&PL_sv_no);
207 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 208
3280af22
NIS		 209 sv_setpv(&PL_sv_yes,PL_Yes);
210 SvNV(&PL_sv_yes);
211 SvREADONLY_on(&PL_sv_yes);
212 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 213 }
79072805 214
76e3520e
GS		 215#ifdef PERL_OBJECT
216 /* TODO: */
6b88bc9c 217 /* PL_sighandlerp = sighandler; */
76e3520e 218#else
cea2e8a9 219 PL_sighandlerp = Perl_sighandler;
76e3520e 220#endif
3280af22 221 PL_pidstatus = newHV();
44a8e56a 222
79072805
LW		 223#ifdef MSDOS
224 /*
225 * There is no way we can refer to them from Perl so close them to save
226 * space. The other alternative would be to provide STDAUX and STDPRN
227 * filehandles.
228 */
2b96b0a5
JH		 229 (void)PerlIO_close(PerlIO_importFILE(stdaux, 0));
230 (void)PerlIO_close(PerlIO_importFILE(stdprn, 0));
79072805
LW		 231#endif
232 }
233
79cb57f6 234 PL_nrs = newSVpvn("\n", 1);
3280af22 235 PL_rs = SvREFCNT_inc(PL_nrs);
dc92893f 236
cea2e8a9 237 init_stacks();
79072805 238
748a9306 239 init_ids();
3280af22 240 PL_lex_state = LEX_NOTPARSING;
a5f75d66 241
312caa8e 242 JMPENV_BOOTSTRAP;
f86702cc 243 STATUS_ALL_SUCCESS;
244
0672f40e 245 init_i18nl10n(1);
36477c24 246 SET_NUMERIC_STANDARD();
0b5b802d 247
a7cb1f99
GS		 248 {
249 U8 *s;
250 PL_patchlevel = NEWSV(0,4);
155aba94 251 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 252 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 253 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 254 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS		 255 /* Build version strings using "native" characters */
256 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
257 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
258 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS		 259 *s = '\0';
260 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
261 SvPOK_on(PL_patchlevel);
262 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
263 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 264#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 265 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 266#endif
a7cb1f99
GS		 267 ;
268 SvNOK_on(PL_patchlevel); /* dual valued */
269 SvUTF8_on(PL_patchlevel);
270 SvREADONLY_on(PL_patchlevel);
271 }
79072805 272
ab821d7f 273#if defined(LOCAL_PATCH_COUNT)
3280af22 274 PL_localpatches = local_patches; /* For possible -v */
ab821d7f 275#endif
276
52853b95
GS		 277#ifdef HAVE_INTERP_INTERN
278 sys_intern_init();
279#endif
280
4b556e6c 281 PerlIO_init(); /* Hook to IO system */
760ac839 282
3280af22
NIS		 283 PL_fdpid = newAV(); /* for remembering popen pids by fd */
284 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 285 PL_errors = newSVpvn("",0);
1fcf4c12 286#ifdef USE_ITHREADS
13137afc
AB		 287 PL_regex_padav = newAV();
288 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
289 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 290#endif
e5dd39fc
AB		 291#ifdef USE_REENTRANT_API
292 New(31337, PL_reentrant_buffer,1, REBUF);
293 New(31337, PL_reentrant_buffer->tmbuff,1, struct tm);
294#endif
8990e307 295 ENTER;
79072805
LW		 296}
297
954c1994
GS		 298/*
299=for apidoc perl_destruct
300
301Shuts down a Perl interpreter. See L<perlembed>.
302
303=cut
304*/
305
31d77e54 306int
0cb96387 307perl_destruct(pTHXx)
79072805 308{
748a9306 309 int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 310 HV *hv;
1f2bfc8a 311#ifdef USE_THREADS
33f46ff6 312 Thread t;
cea2e8a9 313 dTHX;
1f2bfc8a 314#endif /* USE_THREADS */
8990e307 315
7766f137
GS		 316 /* wait for all pseudo-forked children to finish */
317 PERL_WAIT_FOR_CHILDREN;
318
11343788 319#ifdef USE_THREADS
0f15f207 320#ifndef FAKE_THREADS
8023c3ce
MB		 321 /* Pass 1 on any remaining threads: detach joinables, join zombies */
322 retry_cleanup:
533c011a 323 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 324 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 325 "perl_destruct: waiting for %d threads...\n",
533c011a 326 PL_nthreads - 1));
33f46ff6 327 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB		 328 MUTEX_LOCK(&t->mutex);
329 switch (ThrSTATE(t)) {
330 AV *av;
c7848ba1 331 case THRf_ZOMBIE:
bf49b057 332 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 333 "perl_destruct: joining zombie %p\n", t));
605e5515
MB		 334 ThrSETSTATE(t, THRf_DEAD);
335 MUTEX_UNLOCK(&t->mutex);
533c011a 336 PL_nthreads--;
8023c3ce
MB		 337 /*
338 * The SvREFCNT_dec below may take a long time (e.g. av
339 * may contain an object scalar whose destructor gets
340 * called) so we have to unlock threads_mutex and start
341 * all over again.
342 */
533c011a 343 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 344 JOIN(t, &av);
605e5515 345 SvREFCNT_dec((SV*)av);
bf49b057 346 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 347 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 348 goto retry_cleanup;
c7848ba1 349 case THRf_R_JOINABLE:
bf49b057 350 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 351 "perl_destruct: detaching thread %p\n", t));
352 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 353 /*
c7848ba1
MB		 354 * We unlock threads_mutex and t->mutex in the opposite order
355 * from which we locked them just so that DETACH won't
356 * deadlock if it panics. It's only a breach of good style
357 * not a bug since they are unlocks not locks.
358 */
533c011a 359 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB		 360 DETACH(t);
361 MUTEX_UNLOCK(&t->mutex);
8023c3ce 362 goto retry_cleanup;
c7848ba1 363 default:
bf49b057 364 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB		 365 "perl_destruct: ignoring %p (state %u)\n",
366 t, ThrSTATE(t)));
367 MUTEX_UNLOCK(&t->mutex);
c7848ba1 368 /* fall through and out */
33f46ff6
MB		 369 }
370 }
8023c3ce
MB		 371 /* We leave the above "Pass 1" loop with threads_mutex still locked */
372
373 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 374 while (PL_nthreads > 1)
11343788 375 {
bf49b057 376 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 377 "perl_destruct: final wait for %d threads\n",
533c011a
NIS		 378 PL_nthreads - 1));
379 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB		 380 }
381 /* At this point, we're the last thread */
533c011a 382 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 383 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS		 384 MUTEX_DESTROY(&PL_threads_mutex);
385 COND_DESTROY(&PL_nthreads_cond);
b57a092c 386 PL_nthreads--;
0f15f207 387#endif /* !defined(FAKE_THREADS) */
11343788
MB		 388#endif /* USE_THREADS */
389
3280af22 390 destruct_level = PL_perl_destruct_level;
4633a7c4
LW		 391#ifdef DEBUGGING
392 {
393 char *s;
155aba94 394 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc 395 int i = atoi(s);
396 if (destruct_level < i)
397 destruct_level = i;
398 }
4633a7c4
LW		 399 }
400#endif
401
31d77e54
AB		 402
403 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB		 404 dJMPENV;
405 int x = 0;
406
407 JMPENV_PUSH(x);
408 if (PL_endav && !PL_minus_c)
409 call_list(PL_scopestack_ix, PL_endav);
410 JMPENV_POP;
26f423df 411 }
f3faeb53 412 LEAVE;
a0d0e21e
LW		 413 FREETMPS;
414
ff0cee69 415 /* We must account for everything. */
416
417 /* Destroy the main CV and syntax tree */
3280af22
NIS		 418 if (PL_main_root) {
419 PL_curpad = AvARRAY(PL_comppad);
420 op_free(PL_main_root);
421 PL_main_root = Nullop;
a0d0e21e 422 }
3280af22
NIS		 423 PL_curcop = &PL_compiling;
424 PL_main_start = Nullop;
425 SvREFCNT_dec(PL_main_cv);
426 PL_main_cv = Nullcv;
24d3c518 427 PL_dirty = TRUE;
ff0cee69 428
13621cfb
NIS		 429 /* Tell PerlIO we are about to tear things apart in case
430 we have layers which are using resources that should
431 be cleaned up now.
432 */
433
434 PerlIO_destruct(aTHX);
435
3280af22 436 if (PL_sv_objcount) {
a0d0e21e
LW		 437 /*
438 * Try to destruct global references. We do this first so that the
439 * destructors and destructees still exist. Some sv's might remain.
440 * Non-referenced objects are on their own.
441 */
a0d0e21e 442 sv_clean_objs();
8990e307
LW		 443 }
444
5cd24f17 445 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS		 446 SvREFCNT_dec(PL_warnhook);
447 PL_warnhook = Nullsv;
448 SvREFCNT_dec(PL_diehook);
449 PL_diehook = Nullsv;
5cd24f17 450
4b556e6c 451 /* call exit list functions */
3280af22 452 while (PL_exitlistlen-- > 0)
0cb96387 453 PL_exitlist[PL_exitlistlen].fn(aTHXo_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 454
3280af22 455 Safefree(PL_exitlist);
4b556e6c 456
a0d0e21e 457 if (destruct_level == 0){
8990e307 458
a0d0e21e 459 DEBUG_P(debprofdump());
ac27b0f5 460
a0d0e21e 461 /* The exit() function will do everything that needs doing. */
31d77e54 462 return STATUS_NATIVE_EXPORT;;
a0d0e21e 463 }
5dd60ef7 464
551a8b83
JH		 465 /* jettison our possibly duplicated environment */
466
467#ifdef USE_ENVIRON_ARRAY
468 if (environ != PL_origenviron) {
469 I32 i;
470
471 for (i = 0; environ[i]; i++)
4b420006
JH		 472 safesysfree(environ[i]);
473 /* Must use safesysfree() when working with environ. */
474 safesysfree(environ);
551a8b83
JH		 475
476 environ = PL_origenviron;
477 }
478#endif
479
5f8cb046
DM		 480#ifdef USE_ITHREADS
481 /* the syntax tree is shared between clones
482 * so op_free(PL_main_root) only ReREFCNT_dec's
483 * REGEXPs in the parent interpreter
484 * we need to manually ReREFCNT_dec for the clones
485 */
486 {
487 I32 i = AvFILLp(PL_regex_padav) + 1;
488 SV **ary = AvARRAY(PL_regex_padav);
489
490 while (i) {
35061a7e
DM		 491 SV *resv = ary[--i];
492 REGEXP *re = (REGEXP *)SvIVX(resv);
493
494 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 495 /* this is PL_reg_curpm, already freed
35061a7e
DM		 496 * flag is set in regexec.c:S_regtry
497 */
498 SvFLAGS(resv) &= ~SVf_BREAK;
499 }
500 else {
5f8cb046
DM		 501 ReREFCNT_dec(re);
502 }
503 }
504 }
505 SvREFCNT_dec(PL_regex_padav);
506 PL_regex_padav = Nullav;
507 PL_regex_pad = NULL;
508#endif
509
5f05dabc 510 /* loosen bonds of global variables */
511
3280af22
NIS		 512 if(PL_rsfp) {
513 (void)PerlIO_close(PL_rsfp);
514 PL_rsfp = Nullfp;
8ebc5c01 515 }
516
517 /* Filters for program text */
3280af22
NIS		 518 SvREFCNT_dec(PL_rsfp_filters);
519 PL_rsfp_filters = Nullav;
8ebc5c01 520
521 /* switches */
3280af22
NIS		 522 PL_preprocess = FALSE;
523 PL_minus_n = FALSE;
524 PL_minus_p = FALSE;
525 PL_minus_l = FALSE;
526 PL_minus_a = FALSE;
527 PL_minus_F = FALSE;
528 PL_doswitches = FALSE;
599cee73 529 PL_dowarn = G_WARN_OFF;
3280af22
NIS		 530 PL_doextract = FALSE;
531 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS		 532 PL_unsafe = FALSE;
533
534 Safefree(PL_inplace);
535 PL_inplace = Nullch;
a7cb1f99 536 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS		 537
538 if (PL_e_script) {
539 SvREFCNT_dec(PL_e_script);
540 PL_e_script = Nullsv;
8ebc5c01 541 }
542
bc0a45ed
DM		 543 while (--PL_origargc >= 0) {
544 Safefree(PL_origargv[PL_origargc]);
545 }
546 Safefree(PL_origargv);
547
8ebc5c01 548 /* magical thingies */
549
7889fe52
NIS		 550 SvREFCNT_dec(PL_ofs_sv); /* $, */
551 PL_ofs_sv = Nullsv;
5f05dabc 552
7889fe52
NIS		 553 SvREFCNT_dec(PL_ors_sv); /* $\ */
554 PL_ors_sv = Nullsv;
8ebc5c01 555
3280af22
NIS		 556 SvREFCNT_dec(PL_rs); /* $/ */
557 PL_rs = Nullsv;
dc92893f 558
3280af22
NIS		 559 SvREFCNT_dec(PL_nrs); /* $/ helper */
560 PL_nrs = Nullsv;
5f05dabc 561
d33b2eba
GS		 562 PL_multiline = 0; /* $* */
563 Safefree(PL_osname); /* $^O */
564 PL_osname = Nullch;
5f05dabc 565
3280af22
NIS		 566 SvREFCNT_dec(PL_statname);
567 PL_statname = Nullsv;
568 PL_statgv = Nullgv;
5f05dabc 569
8ebc5c01 570 /* defgv, aka *_ should be taken care of elsewhere */
571
8ebc5c01 572 /* clean up after study() */
3280af22
NIS		 573 SvREFCNT_dec(PL_lastscream);
574 PL_lastscream = Nullsv;
575 Safefree(PL_screamfirst);
576 PL_screamfirst = 0;
577 Safefree(PL_screamnext);
578 PL_screamnext = 0;
8ebc5c01 579
7d5ea4e7
GS		 580 /* float buffer */
581 Safefree(PL_efloatbuf);
582 PL_efloatbuf = Nullch;
583 PL_efloatsize = 0;
584
8ebc5c01 585 /* startup and shutdown function lists */
3280af22
NIS		 586 SvREFCNT_dec(PL_beginav);
587 SvREFCNT_dec(PL_endav);
7d30b5c4 588 SvREFCNT_dec(PL_checkav);
3280af22
NIS		 589 SvREFCNT_dec(PL_initav);
590 PL_beginav = Nullav;
591 PL_endav = Nullav;
7d30b5c4 592 PL_checkav = Nullav;
3280af22 593 PL_initav = Nullav;
5618dfe8 594
8ebc5c01 595 /* shortcuts just get cleared */
3280af22 596 PL_envgv = Nullgv;
3280af22
NIS		 597 PL_incgv = Nullgv;
598 PL_hintgv = Nullgv;
599 PL_errgv = Nullgv;
600 PL_argvgv = Nullgv;
601 PL_argvoutgv = Nullgv;
602 PL_stdingv = Nullgv;
bf49b057 603 PL_stderrgv = Nullgv;
3280af22
NIS		 604 PL_last_in_gv = Nullgv;
605 PL_replgv = Nullgv;
5c831c24 606 PL_debstash = Nullhv;
8ebc5c01 607
608 /* reset so print() ends up where we expect */
609 setdefout(Nullgv);
5c831c24 610
7a1c5554
GS		 611 SvREFCNT_dec(PL_argvout_stack);
612 PL_argvout_stack = Nullav;
8ebc5c01 613
5c831c24
GS		 614 SvREFCNT_dec(PL_modglobal);
615 PL_modglobal = Nullhv;
616 SvREFCNT_dec(PL_preambleav);
617 PL_preambleav = Nullav;
618 SvREFCNT_dec(PL_subname);
619 PL_subname = Nullsv;
620 SvREFCNT_dec(PL_linestr);
621 PL_linestr = Nullsv;
622 SvREFCNT_dec(PL_pidstatus);
623 PL_pidstatus = Nullhv;
624 SvREFCNT_dec(PL_toptarget);
625 PL_toptarget = Nullsv;
626 SvREFCNT_dec(PL_bodytarget);
627 PL_bodytarget = Nullsv;
628 PL_formtarget = Nullsv;
629
d33b2eba 630 /* free locale stuff */
b9582b6a 631#ifdef USE_LOCALE_COLLATE
d33b2eba
GS		 632 Safefree(PL_collation_name);
633 PL_collation_name = Nullch;
b9582b6a 634#endif
d33b2eba 635
b9582b6a 636#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS		 637 Safefree(PL_numeric_name);
638 PL_numeric_name = Nullch;
a453c169 639 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 640#endif
d33b2eba 641
5c831c24
GS		 642 /* clear utf8 character classes */
643 SvREFCNT_dec(PL_utf8_alnum);
644 SvREFCNT_dec(PL_utf8_alnumc);
645 SvREFCNT_dec(PL_utf8_ascii);
646 SvREFCNT_dec(PL_utf8_alpha);
647 SvREFCNT_dec(PL_utf8_space);
648 SvREFCNT_dec(PL_utf8_cntrl);
649 SvREFCNT_dec(PL_utf8_graph);
650 SvREFCNT_dec(PL_utf8_digit);
651 SvREFCNT_dec(PL_utf8_upper);
652 SvREFCNT_dec(PL_utf8_lower);
653 SvREFCNT_dec(PL_utf8_print);
654 SvREFCNT_dec(PL_utf8_punct);
655 SvREFCNT_dec(PL_utf8_xdigit);
656 SvREFCNT_dec(PL_utf8_mark);
657 SvREFCNT_dec(PL_utf8_toupper);
658 SvREFCNT_dec(PL_utf8_tolower);
659 PL_utf8_alnum = Nullsv;
660 PL_utf8_alnumc = Nullsv;
661 PL_utf8_ascii = Nullsv;
662 PL_utf8_alpha = Nullsv;
663 PL_utf8_space = Nullsv;
664 PL_utf8_cntrl = Nullsv;
665 PL_utf8_graph = Nullsv;
666 PL_utf8_digit = Nullsv;
667 PL_utf8_upper = Nullsv;
668 PL_utf8_lower = Nullsv;
669 PL_utf8_print = Nullsv;
670 PL_utf8_punct = Nullsv;
671 PL_utf8_xdigit = Nullsv;
672 PL_utf8_mark = Nullsv;
673 PL_utf8_toupper = Nullsv;
674 PL_utf8_totitle = Nullsv;
675 PL_utf8_tolower = Nullsv;
676
971a9dd3
GS		 677 if (!specialWARN(PL_compiling.cop_warnings))
678 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 679 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS		 680 if (!specialCopIO(PL_compiling.cop_io))
681 SvREFCNT_dec(PL_compiling.cop_io);
682 PL_compiling.cop_io = Nullsv;
f4dd75d9
GS		 683#ifdef USE_ITHREADS
684 Safefree(CopFILE(&PL_compiling));
685 CopFILE(&PL_compiling) = Nullch;
686 Safefree(CopSTASHPV(&PL_compiling));
687#else
01724ea0 688 SvREFCNT_dec(CopFILEGV(&PL_compiling));
f4dd75d9
GS		 689 CopFILEGV(&PL_compiling) = Nullgv;
690 /* cop_stash is not refcounted */
01724ea0 691#endif
5c831c24 692
a0d0e21e 693 /* Prepare to destruct main symbol table. */
5f05dabc 694
3280af22
NIS		 695 hv = PL_defstash;
696 PL_defstash = 0;
a0d0e21e 697 SvREFCNT_dec(hv);
5c831c24
GS		 698 SvREFCNT_dec(PL_curstname);
699 PL_curstname = Nullsv;
a0d0e21e 700
5a844595
GS		 701 /* clear queued errors */
702 SvREFCNT_dec(PL_errors);
703 PL_errors = Nullsv;
704
a0d0e21e 705 FREETMPS;
0453d815 706 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 707 if (PL_scopestack_ix != 0)
0453d815
PM		 708 Perl_warner(aTHX_ WARN_INTERNAL,
709 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS		 710 (long)PL_scopestack_ix);
711 if (PL_savestack_ix != 0)
0453d815
PM		 712 Perl_warner(aTHX_ WARN_INTERNAL,
713 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS		 714 (long)PL_savestack_ix);
715 if (PL_tmps_floor != -1)
0453d815 716 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 717 (long)PL_tmps_floor + 1);
a0d0e21e 718 if (cxstack_ix != -1)
0453d815 719 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 720 (long)cxstack_ix + 1);
a0d0e21e 721 }
8990e307
LW		 722
723 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 724 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 725 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH		 726
727 /* the 2 is for PL_fdpid and PL_strtab */
728 while (PL_sv_count > 2 && sv_clean_all())
729 ;
730
d33b2eba
GS		 731 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
732 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS		 733 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
734 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 735
d4777f27
GS		 736 AvREAL_off(PL_fdpid); /* no surviving entries */
737 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS		 738 PL_fdpid = Nullav;
739
6c644e78
GS		 740#ifdef HAVE_INTERP_INTERN
741 sys_intern_clear();
742#endif
743
6e72f9df 744 /* Destruct the global string table. */
745 {
746 /* Yell and reset the HeVAL() slots that are still holding refcounts,
747 * so that sv_free() won't fail on them.
748 */
749 I32 riter;
750 I32 max;
751 HE *hent;
752 HE **array;
753
754 riter = 0;
3280af22
NIS		 755 max = HvMAX(PL_strtab);
756 array = HvARRAY(PL_strtab);
6e72f9df 757 hent = array[0];
758 for (;;) {
0453d815
PM		 759 if (hent && ckWARN_d(WARN_INTERNAL)) {
760 Perl_warner(aTHX_ WARN_INTERNAL,
761 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df 762 HeVAL(hent) - Nullsv, HeKEY(hent));
763 HeVAL(hent) = Nullsv;
764 hent = HeNEXT(hent);
765 }
766 if (!hent) {
767 if (++riter > max)
768 break;
769 hent = array[riter];
770 }
771 }
772 }
3280af22 773 SvREFCNT_dec(PL_strtab);
6e72f9df 774
e652bb2f 775#ifdef USE_ITHREADS
a0739874
DM		 776 /* free the pointer table used for cloning */
777 ptr_table_free(PL_ptr_table);
53186e96 778#endif
a0739874 779
d33b2eba
GS		 780 /* free special SVs */
781
782 SvREFCNT(&PL_sv_yes) = 0;
783 sv_clear(&PL_sv_yes);
784 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 785 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS		 786
787 SvREFCNT(&PL_sv_no) = 0;
788 sv_clear(&PL_sv_no);
789 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 790 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS		 791
792 SvREFCNT(&PL_sv_undef) = 0;
793 SvREADONLY_off(&PL_sv_undef);
d33b2eba 794
0453d815
PM		 795 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
796 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 797
3280af22 798 Safefree(PL_origfilename);
3280af22 799 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ		 800 if (PL_reg_curpm)
801 Safefree(PL_reg_curpm);
82ba1be6 802 Safefree(PL_reg_poscache);
3280af22
NIS		 803 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
804 Safefree(PL_op_mask);
cf36064f
GS		 805 Safefree(PL_psig_ptr);
806 Safefree(PL_psig_name);
2c2666fc 807 Safefree(PL_bitcount);
ce08f86c 808 Safefree(PL_psig_pend);
6e72f9df 809 nuke_stacks();
3280af22 810 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 811
a0d0e21e 812 DEBUG_P(debprofdump());
11343788 813#ifdef USE_THREADS
5f08fbcd 814 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS		 815 MUTEX_DESTROY(&PL_sv_mutex);
816 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 817 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 818 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 819 COND_DESTROY(&PL_eval_cond);
11d617a5
GS		 820#ifdef EMULATE_ATOMIC_REFCOUNTS
821 MUTEX_DESTROY(&PL_svref_mutex);
822#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 823
8023c3ce 824 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS		 825 Safefree(SvPVX(PL_thrsv));
826 Safefree(SvANY(PL_thrsv));
827 Safefree(PL_thrsv);
828 PL_thrsv = Nullsv;
8023c3ce 829#endif /* USE_THREADS */
d33b2eba 830
e5dd39fc
AB		 831#ifdef USE_REENTRANT_API
832 Safefree(PL_reentrant_buffer->tmbuff);
833 Safefree(PL_reentrant_buffer);
834#endif
835
612f20c3
GS		 836 sv_free_arenas();
837
fc36a67e 838 /* As the absolutely last thing, free the non-arena SV for mess() */
839
3280af22 840 if (PL_mess_sv) {
9c63abab
GS		 841 /* it could have accumulated taint magic */
842 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
843 MAGIC* mg;
844 MAGIC* moremagic;
845 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
846 moremagic = mg->mg_moremagic;
14befaf4
DM		 847 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
848 && mg->mg_len >= 0)
9c63abab
GS		 849 Safefree(mg->mg_ptr);
850 Safefree(mg);
851 }
852 }
fc36a67e 853 /* we know that type >= SVt_PV */
155aba94 854 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS		 855 Safefree(SvPVX(PL_mess_sv));
856 Safefree(SvANY(PL_mess_sv));
857 Safefree(PL_mess_sv);
858 PL_mess_sv = Nullsv;
fc36a67e 859 }
31d77e54 860 return STATUS_NATIVE_EXPORT;
79072805
LW		 861}
862
954c1994
GS		 863/*
864=for apidoc perl_free
865
866Releases a Perl interpreter. See L<perlembed>.
867
868=cut
869*/
870
79072805 871void
0cb96387 872perl_free(pTHXx)
79072805 873{
c5be433b 874#if defined(PERL_OBJECT)
7f0d82f7 875 PerlMem_free(this);
76e3520e 876#else
2986a63f 877# if defined(WIN32) || defined(NETWARE)
ce3e5b80 878# if defined(PERL_IMPLICIT_SYS)
2986a63f
JH		 879 #ifdef NETWARE
880 void *host = nw_internal_host;
881 #else
882 void *host = w32_internal_host;
883 #endif
884 #ifndef NETWARE
885 if (PerlProc_lasthost()) {
ce08f86c 886 PerlIO_cleanup();
2986a63f
JH		 887 }
888 #endif
7f0d82f7 889 PerlMem_free(aTHXx);
2986a63f
JH		 890 #ifdef NETWARE
891 nw5_delete_internal_host(host);
892 #else
893 win32_delete_internal_host(host);
894 #endif
ce3e5b80 895#else
ce08f86c 896 PerlIO_cleanup();
ce3e5b80
NIS		 897 PerlMem_free(aTHXx);
898#endif
1c0ca838
GS		 899# else
900 PerlMem_free(aTHXx);
901# endif
76e3520e 902#endif
79072805
LW		 903}
904
4b556e6c 905void
864dbfa3 906Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 907{
3280af22
NIS		 908 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
909 PL_exitlist[PL_exitlistlen].fn = fn;
910 PL_exitlist[PL_exitlistlen].ptr = ptr;
911 ++PL_exitlistlen;
4b556e6c
JD		 912}
913
954c1994
GS		 914/*
915=for apidoc perl_parse
916
917Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
918
919=cut
920*/
921
79072805 922int
0cb96387 923perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 924{
6224f72b 925 I32 oldscope;
6224f72b 926 int ret;
db36c5a1 927 dJMPENV;
cea2e8a9
GS		 928#ifdef USE_THREADS
929 dTHX;
930#endif
8d063cd8 931
a687059c
LW		 932#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
933#ifdef IAMSUID
934#undef IAMSUID
cea2e8a9 935 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW		 936setuid perl scripts securely.\n");
937#endif
938#endif
939
8f1f23e8 940#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
6e72f9df 941 _dyld_lookup_and_bind
942 ("__environ", (unsigned long *) &environ_pointer, NULL);
943#endif /* environ */
944
3280af22 945 PL_origargc = argc;
bc0a45ed
DM		 946 {
947 /* we copy rather than point to argv
948 * since perl_clone will copy and perl_destruct
949 * has no way of knowing if we've made a copy or
950 * just point to argv
951 */
952 int i = PL_origargc;
953 New(0, PL_origargv, i+1, char*);
954 PL_origargv[i] = '\0';
955 while (i-- > 0) {
956 PL_origargv[i] = savepv(argv[i]);
957 }
958 }
959
fa6a1c44 960#ifdef USE_ENVIRON_ARRAY
3280af22 961 PL_origenviron = environ;
a0d0e21e
LW		 962#endif
963
3280af22 964 if (PL_do_undump) {
a0d0e21e
LW		 965
966 /* Come here if running an undumped a.out. */
967
3280af22
NIS		 968 PL_origfilename = savepv(argv[0]);
969 PL_do_undump = FALSE;
a0d0e21e 970 cxstack_ix = -1; /* start label stack again */
748a9306 971 init_ids();
a0d0e21e
LW		 972 init_postdump_symbols(argc,argv,env);
973 return 0;
974 }
975
3280af22
NIS		 976 if (PL_main_root) {
977 PL_curpad = AvARRAY(PL_comppad);
978 op_free(PL_main_root);
979 PL_main_root = Nullop;
ff0cee69 980 }
3280af22
NIS		 981 PL_main_start = Nullop;
982 SvREFCNT_dec(PL_main_cv);
983 PL_main_cv = Nullcv;
79072805 984
3280af22
NIS		 985 time(&PL_basetime);
986 oldscope = PL_scopestack_ix;
599cee73 987 PL_dowarn = G_WARN_OFF;
f86702cc 988
14dd3ad8
GS		 989#ifdef PERL_FLEXIBLE_EXCEPTIONS
990 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
991#else
992 JMPENV_PUSH(ret);
993#endif
6224f72b 994 switch (ret) {
312caa8e 995 case 0:
14dd3ad8
GS		 996#ifndef PERL_FLEXIBLE_EXCEPTIONS
997 parse_body(env,xsinit);
998#endif
7d30b5c4
GS		 999 if (PL_checkav)
1000 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 1001 ret = 0;
1002 break;
6224f72b
GS		 1003 case 1:
1004 STATUS_ALL_FAILURE;
1005 /* FALL THROUGH */
1006 case 2:
1007 /* my_exit() was called */
3280af22 1008 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1009 LEAVE;
1010 FREETMPS;
3280af22 1011 PL_curstash = PL_defstash;
7d30b5c4
GS		 1012 if (PL_checkav)
1013 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 1014 ret = STATUS_NATIVE_EXPORT;
1015 break;
6224f72b 1016 case 3:
bf49b057 1017 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS		 1018 ret = 1;
1019 break;
6224f72b 1020 }
14dd3ad8
GS		 1021 JMPENV_POP;
1022 return ret;
1023}
1024
1025#ifdef PERL_FLEXIBLE_EXCEPTIONS
1026STATIC void *
1027S_vparse_body(pTHX_ va_list args)
1028{
1029 char **env = va_arg(args, char**);
1030 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1031
1032 return parse_body(env, xsinit);
312caa8e 1033}
14dd3ad8 1034#endif
312caa8e
CS		 1035
1036STATIC void *
14dd3ad8 1037S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1038{
312caa8e
CS		 1039 int argc = PL_origargc;
1040 char **argv = PL_origargv;
312caa8e
CS		 1041 char *scriptname = NULL;
1042 int fdscript = -1;
1043 VOL bool dosearch = FALSE;
1044 char *validarg = "";
1045 AV* comppadlist;
1046 register SV *sv;
1047 register char *s;
cf756827 1048 char *cddir = Nullch;
312caa8e 1049
3280af22 1050 sv_setpvn(PL_linestr,"",0);
79cb57f6 1051 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS		 1052 SAVEFREESV(sv);
1053 init_main_stash();
54310121 1054
6224f72b
GS		 1055 for (argc--,argv++; argc > 0; argc--,argv++) {
1056 if (argv[0][0] != '-' || !argv[0][1])
1057 break;
1058#ifdef DOSUID
1059 if (*validarg)
1060 validarg = " PHOOEY ";
1061 else
1062 validarg = argv[0];
13281fa4 1063#endif
6224f72b
GS		 1064 s = argv[0]+1;
1065 reswitch:
1066 switch (*s) {
729a02f2
GS		 1067 case 'C':
1068#ifdef WIN32
c0932edc 1069 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS		 1070 /* FALL THROUGH */
1071#endif
1d5472a9
GS		 1072#ifndef PERL_STRICT_CR
1073 case '\r':
1074#endif
6224f72b
GS		 1075 case ' ':
1076 case '0':
1077 case 'F':
1078 case 'a':
1079 case 'c':
1080 case 'd':
1081 case 'D':
1082 case 'h':
1083 case 'i':
1084 case 'l':
1085 case 'M':
1086 case 'm':
1087 case 'n':
1088 case 'p':
1089 case 's':
1090 case 'u':
1091 case 'U':
1092 case 'v':
599cee73
PM		 1093 case 'W':
1094 case 'X':
6224f72b 1095 case 'w':
155aba94 1096 if ((s = moreswitches(s)))
6224f72b
GS		 1097 goto reswitch;
1098 break;
33b78306 1099
6224f72b 1100 case 'T':
3280af22 1101 PL_tainting = TRUE;
6224f72b
GS		 1102 s++;
1103 goto reswitch;
f86702cc 1104
6224f72b 1105 case 'e':
bf4acbe4
GS		 1106#ifdef MACOS_TRADITIONAL
1107 /* ignore -e for Dev:Pseudo argument */
1108 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1109 break;
bf4acbe4 1110#endif
3280af22 1111 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1112 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1113 if (!PL_e_script) {
79cb57f6 1114 PL_e_script = newSVpvn("",0);
0cb96387 1115 filter_add(read_e_script, NULL);
6224f72b
GS		 1116 }
1117 if (*++s)
3280af22 1118 sv_catpv(PL_e_script, s);
6224f72b 1119 else if (argv[1]) {
3280af22 1120 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS		 1121 argc--,argv++;
1122 }
1123 else
cea2e8a9 1124 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1125 sv_catpv(PL_e_script, "\n");
6224f72b 1126 break;
afe37c7d 1127
6224f72b
GS		 1128 case 'I': /* -I handled both here and in moreswitches() */
1129 forbid_setid("-I");
1130 if (!*++s && (s=argv[1]) != Nullch) {
1131 argc--,argv++;
1132 }
6224f72b 1133 if (s && *s) {
0df16ed7
GS		 1134 char *p;
1135 STRLEN len = strlen(s);
1136 p = savepvn(s, len);
9c8a64f0 1137 incpush(p, TRUE, TRUE);
0df16ed7
GS		 1138 sv_catpvn(sv, "-I", 2);
1139 sv_catpvn(sv, p, len);
1140 sv_catpvn(sv, " ", 1);
6224f72b 1141 Safefree(p);
0df16ed7
GS		 1142 }
1143 else
a67e862a 1144 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS		 1145 break;
1146 case 'P':
1147 forbid_setid("-P");
3280af22 1148 PL_preprocess = TRUE;
6224f72b
GS		 1149 s++;
1150 goto reswitch;
1151 case 'S':
1152 forbid_setid("-S");
1153 dosearch = TRUE;
1154 s++;
1155 goto reswitch;
1156 case 'V':
3280af22
NIS		 1157 if (!PL_preambleav)
1158 PL_preambleav = newAV();
1159 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1160 if (*++s != ':') {
3280af22 1161 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1162#ifdef VMS
6b88bc9c 1163 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1164#else
3280af22 1165 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1166#endif
3280af22 1167 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1168# ifdef DEBUGGING
3280af22 1169 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1170# endif
6224f72b 1171# ifdef MULTIPLICITY
8f872242 1172 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1173# endif
b363f7ed
GS		 1174# ifdef USE_THREADS
1175 sv_catpv(PL_Sv," USE_THREADS");
1176# endif
ac5e8965
JH		 1177# ifdef USE_ITHREADS
1178 sv_catpv(PL_Sv," USE_ITHREADS");
1179# endif
10cc9d2a
JH		 1180# ifdef USE_64_BIT_INT
1181 sv_catpv(PL_Sv," USE_64_BIT_INT");
1182# endif
1183# ifdef USE_64_BIT_ALL
1184 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH		 1185# endif
1186# ifdef USE_LONG_DOUBLE
1187 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1188# endif
53430762
JH		 1189# ifdef USE_LARGE_FILES
1190 sv_catpv(PL_Sv," USE_LARGE_FILES");
1191# endif
ac5e8965
JH		 1192# ifdef USE_SOCKS
1193 sv_catpv(PL_Sv," USE_SOCKS");
1194# endif
b363f7ed
GS		 1195# ifdef PERL_OBJECT
1196 sv_catpv(PL_Sv," PERL_OBJECT");
1197# endif
1198# ifdef PERL_IMPLICIT_CONTEXT
1199 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1200# endif
1201# ifdef PERL_IMPLICIT_SYS
1202 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1203# endif
3280af22 1204 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1205
6224f72b
GS		 1206#if defined(LOCAL_PATCH_COUNT)
1207 if (LOCAL_PATCH_COUNT > 0) {
1208 int i;
3280af22 1209 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1210 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1211 if (PL_localpatches[i])
cea2e8a9 1212 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS		 1213 }
1214 }
1215#endif
cea2e8a9 1216 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS		 1217#ifdef __DATE__
1218# ifdef __TIME__
cea2e8a9 1219 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1220# else
cea2e8a9 1221 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS		 1222# endif
1223#endif
3280af22 1224 sv_catpv(PL_Sv, "; \
6224f72b 1225$\"=\"\\n \"; \
69fcd688
JH		 1226@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1227#ifdef __CYGWIN__
1228 sv_catpv(PL_Sv,"\
1229push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1230#endif
1231 sv_catpv(PL_Sv, "\
6224f72b
GS		 1232print \" \\%ENV:\\n @env\\n\" if @env; \
1233print \" \\@INC:\\n @INC\\n\";");
1234 }
1235 else {
3280af22
NIS		 1236 PL_Sv = newSVpv("config_vars(qw(",0);
1237 sv_catpv(PL_Sv, ++s);
1238 sv_catpv(PL_Sv, "))");
6224f72b
GS		 1239 s += strlen(s);
1240 }
3280af22 1241 av_push(PL_preambleav, PL_Sv);
6224f72b
GS		 1242 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1243 goto reswitch;
1244 case 'x':
3280af22 1245 PL_doextract = TRUE;
6224f72b
GS		 1246 s++;
1247 if (*s)
f4c556ac 1248 cddir = s;
6224f72b
GS		 1249 break;
1250 case 0:
1251 break;
1252 case '-':
1253 if (!*++s || isSPACE(*s)) {
1254 argc--,argv++;
1255 goto switch_end;
1256 }
1257 /* catch use of gnu style long options */
1258 if (strEQ(s, "version")) {
1259 s = "v";
1260 goto reswitch;
1261 }
1262 if (strEQ(s, "help")) {
1263 s = "h";
1264 goto reswitch;
1265 }
1266 s--;
1267 /* FALL THROUGH */
1268 default:
cea2e8a9 1269 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW		 1270 }
1271 }
6224f72b 1272 switch_end:
54310121 1273
f675dbe5
CB		 1274 if (
1275#ifndef SECURE_INTERNAL_GETENV
1276 !PL_tainting &&
1277#endif
cf756827 1278 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1279 {
cf756827 1280 char *popt = s;
74288ac8
GS		 1281 while (isSPACE(*s))
1282 s++;
1283 if (*s == '-' && *(s+1) == 'T')
1284 PL_tainting = TRUE;
1285 else {
cf756827 1286 char *popt_copy = Nullch;
74288ac8 1287 while (s && *s) {
4ea8f8fb 1288 char *d;
74288ac8
GS		 1289 while (isSPACE(*s))
1290 s++;
1291 if (*s == '-') {
1292 s++;
1293 if (isSPACE(*s))
1294 continue;
1295 }
4ea8f8fb 1296 d = s;
74288ac8
GS		 1297 if (!*s)
1298 break;
1299 if (!strchr("DIMUdmw", *s))
cea2e8a9 1300 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS		 1301 while (++s && *s) {
1302 if (isSPACE(*s)) {
cf756827
GS		 1303 if (!popt_copy) {
1304 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1305 s = popt_copy + (s - popt);
1306 d = popt_copy + (d - popt);
1307 }
4ea8f8fb
MS		 1308 *s++ = '\0';
1309 break;
1310 }
1311 }
1312 moreswitches(d);
6224f72b 1313 }
6224f72b
GS		 1314 }
1315 }
a0d0e21e 1316
6224f72b
GS		 1317 if (!scriptname)
1318 scriptname = argv[0];
3280af22 1319 if (PL_e_script) {
6224f72b
GS		 1320 argc++,argv--;
1321 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1322 }
1323 else if (scriptname == Nullch) {
1324#ifdef MSDOS
1325 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1326 moreswitches("h");
1327#endif
1328 scriptname = "-";
1329 }
1330
1331 init_perllib();
1332
1333 open_script(scriptname,dosearch,sv,&fdscript);
1334
1335 validate_suid(validarg, scriptname,fdscript);
1336
64ca3a65 1337#ifndef PERL_MICRO
0b5b802d
GS		 1338#if defined(SIGCHLD) || defined(SIGCLD)
1339 {
1340#ifndef SIGCHLD
1341# define SIGCHLD SIGCLD
1342#endif
1343 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1344 if (sigstate == SIG_IGN) {
1345 if (ckWARN(WARN_SIGNAL))
1346 Perl_warner(aTHX_ WARN_SIGNAL,
1347 "Can't ignore signal CHLD, forcing to default");
1348 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1349 }
1350 }
1351#endif
64ca3a65 1352#endif
0b5b802d 1353
bf4acbe4
GS		 1354#ifdef MACOS_TRADITIONAL
1355 if (PL_doextract || gMacPerl_AlwaysExtract) {
1356#else
f4c556ac 1357 if (PL_doextract) {
bf4acbe4 1358#endif
6224f72b 1359 find_beginning();
f4c556ac
GS		 1360 if (cddir && PerlDir_chdir(cddir) < 0)
1361 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1362
1363 }
6224f72b 1364
3280af22
NIS		 1365 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1366 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1367 CvUNIQUE_on(PL_compcv);
1368
1369 PL_comppad = newAV();
1370 av_push(PL_comppad, Nullsv);
1371 PL_curpad = AvARRAY(PL_comppad);
1372 PL_comppad_name = newAV();
1373 PL_comppad_name_fill = 0;
1374 PL_min_intro_pending = 0;
1375 PL_padix = 0;
6224f72b 1376#ifdef USE_THREADS
79cb57f6 1377 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS		 1378 PL_curpad[0] = (SV*)newAV();
1379 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1380 CvOWNER(PL_compcv) = 0;
1381 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1382 MUTEX_INIT(CvMUTEXP(PL_compcv));
6224f72b
GS		 1383#endif /* USE_THREADS */
1384
1385 comppadlist = newAV();
1386 AvREAL_off(comppadlist);
3280af22
NIS		 1387 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1388 av_store(comppadlist, 1, (SV*)PL_comppad);
1389 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1390
0c4f7ff0 1391 boot_core_PerlIO();
6224f72b 1392 boot_core_UNIVERSAL();
9a34ef1d 1393#ifndef PERL_MICRO
09bef843 1394 boot_core_xsutils();
9a34ef1d 1395#endif
6224f72b
GS		 1396
1397 if (xsinit)
0cb96387 1398 (*xsinit)(aTHXo); /* in case linked C routines want magical variables */
64ca3a65 1399#ifndef PERL_MICRO
ed79a026 1400#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1401 init_os_extras();
6224f72b 1402#endif
64ca3a65 1403#endif
6224f72b 1404
29209bc5 1405#ifdef USE_SOCKS
1b9c9cf5
DH		 1406# ifdef HAS_SOCKS5_INIT
1407 socks5_init(argv[0]);
1408# else
29209bc5 1409 SOCKSinit(argv[0]);
1b9c9cf5 1410# endif
ac27b0f5 1411#endif
29209bc5 1412
6224f72b
GS		 1413 init_predump_symbols();
1414 /* init_postdump_symbols not currently designed to be called */
1415 /* more than once (ENV isn't cleared first, for example) */
1416 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1417 if (!PL_do_undump)
6224f72b
GS		 1418 init_postdump_symbols(argc,argv,env);
1419
1420 init_lexer();
1421
1422 /* now parse the script */
1423
1424 SETERRNO(0,SS$_NORMAL);
3280af22 1425 PL_error_count = 0;
bf4acbe4
GS		 1426#ifdef MACOS_TRADITIONAL
1427 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1428 if (PL_minus_c)
1429 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1430 else {
1431 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1432 MacPerl_MPWFileName(PL_origfilename));
1433 }
1434 }
1435#else
3280af22
NIS		 1436 if (yyparse() || PL_error_count) {
1437 if (PL_minus_c)
cea2e8a9 1438 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1439 else {
cea2e8a9 1440 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1441 PL_origfilename);
6224f72b
GS		 1442 }
1443 }
bf4acbe4 1444#endif
57843af0 1445 CopLINE_set(PL_curcop, 0);
3280af22
NIS		 1446 PL_curstash = PL_defstash;
1447 PL_preprocess = FALSE;
1448 if (PL_e_script) {
1449 SvREFCNT_dec(PL_e_script);
1450 PL_e_script = Nullsv;
6224f72b
GS		 1451 }
1452
1453 /* now that script is parsed, we can modify record separator */
3280af22
NIS		 1454 SvREFCNT_dec(PL_rs);
1455 PL_rs = SvREFCNT_inc(PL_nrs);
864dbfa3 1456 sv_setsv(get_sv("/", TRUE), PL_rs);
3280af22 1457 if (PL_do_undump)
6224f72b
GS		 1458 my_unexec();
1459
57843af0
GS		 1460 if (isWARN_ONCE) {
1461 SAVECOPFILE(PL_curcop);
1462 SAVECOPLINE(PL_curcop);
3280af22 1463 gv_check(PL_defstash);
57843af0 1464 }
6224f72b
GS		 1465
1466 LEAVE;
1467 FREETMPS;
1468
1469#ifdef MYMALLOC
1470 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1471 dump_mstats("after compilation:");
1472#endif
1473
1474 ENTER;
3280af22 1475 PL_restartop = 0;
312caa8e 1476 return NULL;
6224f72b
GS		 1477}
1478
954c1994
GS		 1479/*
1480=for apidoc perl_run
1481
1482Tells a Perl interpreter to run. See L<perlembed>.
1483
1484=cut
1485*/
1486
6224f72b 1487int
0cb96387 1488perl_run(pTHXx)
6224f72b 1489{
6224f72b 1490 I32 oldscope;
14dd3ad8 1491 int ret = 0;
db36c5a1 1492 dJMPENV;
cea2e8a9
GS		 1493#ifdef USE_THREADS
1494 dTHX;
1495#endif
6224f72b 1496
3280af22 1497 oldscope = PL_scopestack_ix;
6224f72b 1498
14dd3ad8 1499#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1500 redo_body:
14dd3ad8
GS		 1501 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1502#else
1503 JMPENV_PUSH(ret);
1504#endif
6224f72b
GS		 1505 switch (ret) {
1506 case 1:
1507 cxstack_ix = -1; /* start context stack again */
312caa8e 1508 goto redo_body;
14dd3ad8
GS		 1509 case 0: /* normal completion */
1510#ifndef PERL_FLEXIBLE_EXCEPTIONS
1511 redo_body:
1512 run_body(oldscope);
1513#endif
1514 /* FALL THROUGH */
1515 case 2: /* my_exit() */
3280af22 1516 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1517 LEAVE;
1518 FREETMPS;
3280af22 1519 PL_curstash = PL_defstash;
31d77e54
AB		 1520 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
1521 PL_endav && !PL_minus_c)
1522 call_list(oldscope, PL_endav);
6224f72b
GS		 1523#ifdef MYMALLOC
1524 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1525 dump_mstats("after execution: ");
1526#endif
14dd3ad8
GS		 1527 ret = STATUS_NATIVE_EXPORT;
1528 break;
6224f72b 1529 case 3:
312caa8e
CS		 1530 if (PL_restartop) {
1531 POPSTACK_TO(PL_mainstack);
1532 goto redo_body;
6224f72b 1533 }
bf49b057 1534 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1535 FREETMPS;
14dd3ad8
GS		 1536 ret = 1;
1537 break;
6224f72b
GS		 1538 }
1539
14dd3ad8
GS		 1540 JMPENV_POP;
1541 return ret;
312caa8e
CS		 1542}
1543
14dd3ad8 1544#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1545STATIC void *
14dd3ad8 1546S_vrun_body(pTHX_ va_list args)
312caa8e 1547{
312caa8e
CS		 1548 I32 oldscope = va_arg(args, I32);
1549
14dd3ad8
GS		 1550 return run_body(oldscope);
1551}
1552#endif
1553
1554
1555STATIC void *
1556S_run_body(pTHX_ I32 oldscope)
1557{
6224f72b 1558 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1559 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1560
3280af22 1561 if (!PL_restartop) {
6224f72b
GS		 1562 DEBUG_x(dump_all());
1563 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH		 1564 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1565 PTR2UV(thr)));
6224f72b 1566
3280af22 1567 if (PL_minus_c) {
bf4acbe4
GS		 1568#ifdef MACOS_TRADITIONAL
1569 PerlIO_printf(Perl_error_log, "%s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
1570#else
bf49b057 1571 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1572#endif
6224f72b
GS		 1573 my_exit(0);
1574 }
3280af22 1575 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1576 sv_setiv(PL_DBsingle, 1);
3280af22
NIS		 1577 if (PL_initav)
1578 call_list(oldscope, PL_initav);
6224f72b
GS		 1579 }
1580
1581 /* do it */
1582
3280af22 1583 if (PL_restartop) {
533c011a 1584 PL_op = PL_restartop;
3280af22 1585 PL_restartop = 0;
cea2e8a9 1586 CALLRUNOPS(aTHX);
6224f72b 1587 }
3280af22
NIS		 1588 else if (PL_main_start) {
1589 CvDEPTH(PL_main_cv) = 1;
533c011a 1590 PL_op = PL_main_start;
cea2e8a9 1591 CALLRUNOPS(aTHX);
6224f72b
GS		 1592 }
1593
f6b3007c
JH		 1594 my_exit(0);
1595 /* NOTREACHED */
312caa8e 1596 return NULL;
6224f72b
GS		 1597}
1598
954c1994
GS		 1599/*
1600=for apidoc p||get_sv
1601
1602Returns the SV of the specified Perl scalar. If C<create> is set and the
1603Perl variable does not exist then it will be created. If C<create> is not
1604set and the variable does not exist then NULL is returned.
1605
1606=cut
1607*/
1608
6224f72b 1609SV*
864dbfa3 1610Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS		 1611{
1612 GV *gv;
1613#ifdef USE_THREADS
1614 if (name[1] == '\0' && !isALPHA(name[0])) {
1615 PADOFFSET tmp = find_threadsv(name);
411caa50 1616 if (tmp != NOT_IN_PAD)
6224f72b 1617 return THREADSV(tmp);
6224f72b
GS		 1618 }
1619#endif /* USE_THREADS */
1620 gv = gv_fetchpv(name, create, SVt_PV);
1621 if (gv)
1622 return GvSV(gv);
1623 return Nullsv;
1624}
1625
954c1994
GS		 1626/*
1627=for apidoc p||get_av
1628
1629Returns the AV of the specified Perl array. If C<create> is set and the
1630Perl variable does not exist then it will be created. If C<create> is not
1631set and the variable does not exist then NULL is returned.
1632
1633=cut
1634*/
1635
6224f72b 1636AV*
864dbfa3 1637Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS		 1638{
1639 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1640 if (create)
1641 return GvAVn(gv);
1642 if (gv)
1643 return GvAV(gv);
1644 return Nullav;
1645}
1646
954c1994
GS		 1647/*
1648=for apidoc p||get_hv
1649
1650Returns the HV of the specified Perl hash. If C<create> is set and the
1651Perl variable does not exist then it will be created. If C<create> is not
1652set and the variable does not exist then NULL is returned.
1653
1654=cut
1655*/
1656
6224f72b 1657HV*
864dbfa3 1658Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1659{
a0d0e21e
LW		 1660 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1661 if (create)
1662 return GvHVn(gv);
1663 if (gv)
1664 return GvHV(gv);
1665 return Nullhv;
1666}
1667
954c1994
GS		 1668/*
1669=for apidoc p||get_cv
1670
1671Returns the CV of the specified Perl subroutine. If C<create> is set and
1672the Perl subroutine does not exist then it will be declared (which has the
1673same effect as saying C<sub name;>). If C<create> is not set and the
1674subroutine does not exist then NULL is returned.
1675
1676=cut
1677*/
1678
a0d0e21e 1679CV*
864dbfa3 1680Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW		 1681{
1682 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1683 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS		 1684 /* XXX this is probably not what they think they're getting.
1685 * It has the same effect as "sub name;", i.e. just a forward
1686 * declaration! */
8ebc5c01 1687 if (create && !GvCVu(gv))
774d564b 1688 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1689 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1690 Nullop,
a0d0e21e
LW		 1691 Nullop);
1692 if (gv)
8ebc5c01 1693 return GvCVu(gv);
a0d0e21e
LW		 1694 return Nullcv;
1695}
1696
79072805
LW		 1697/* Be sure to refetch the stack pointer after calling these routines. */
1698
954c1994
GS		 1699/*
1700=for apidoc p||call_argv
1701
1702Performs a callback to the specified Perl sub. See L<perlcall>.
1703
1704=cut
1705*/
1706
a0d0e21e 1707I32
864dbfa3 1708Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1709
8ac85365
NIS		 1710 /* See G_* flags in cop.h */
1711 /* null terminated arg list */
8990e307 1712{
a0d0e21e 1713 dSP;
8990e307 1714
924508f0 1715 PUSHMARK(SP);
a0d0e21e 1716 if (argv) {
8990e307 1717 while (*argv) {
a0d0e21e 1718 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW		 1719 argv++;
1720 }
a0d0e21e 1721 PUTBACK;
8990e307 1722 }
864dbfa3 1723 return call_pv(sub_name, flags);
8990e307
LW		 1724}
1725
954c1994
GS		 1726/*
1727=for apidoc p||call_pv
1728
1729Performs a callback to the specified Perl sub. See L<perlcall>.
1730
1731=cut
1732*/
1733
a0d0e21e 1734I32
864dbfa3 1735Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS		 1736 /* name of the subroutine */
1737 /* See G_* flags in cop.h */
a0d0e21e 1738{
864dbfa3 1739 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW		 1740}
1741
954c1994
GS		 1742/*
1743=for apidoc p||call_method
1744
1745Performs a callback to the specified Perl method. The blessed object must
1746be on the stack. See L<perlcall>.
1747
1748=cut
1749*/
1750
a0d0e21e 1751I32
864dbfa3 1752Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS		 1753 /* name of the subroutine */
1754 /* See G_* flags in cop.h */
a0d0e21e 1755{
968b3946 1756 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW		 1757}
1758
1759/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS		 1760/*
1761=for apidoc p||call_sv
1762
1763Performs a callback to the Perl sub whose name is in the SV. See
1764L<perlcall>.
1765
1766=cut
1767*/
1768
a0d0e21e 1769I32
864dbfa3 1770Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1771 /* See G_* flags in cop.h */
a0d0e21e 1772{
924508f0 1773 dSP;
a0d0e21e 1774 LOGOP myop; /* fake syntax tree node */
968b3946 1775 UNOP method_op;
aa689395 1776 I32 oldmark;
13689cfe 1777 volatile I32 retval = 0;
a0d0e21e 1778 I32 oldscope;
54310121 1779 bool oldcatch = CATCH_GET;
6224f72b 1780 int ret;
533c011a 1781 OP* oldop = PL_op;
db36c5a1 1782 dJMPENV;
1e422769 1783
a0d0e21e
LW		 1784 if (flags & G_DISCARD) {
1785 ENTER;
1786 SAVETMPS;
1787 }
1788
aa689395 1789 Zero(&myop, 1, LOGOP);
54310121 1790 myop.op_next = Nullop;
f51d4af5 1791 if (!(flags & G_NOARGS))
aa689395 1792 myop.op_flags |= OPf_STACKED;
54310121 1793 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1794 (flags & G_ARRAY) ? OPf_WANT_LIST :
1795 OPf_WANT_SCALAR);
462e5cf6 1796 SAVEOP();
533c011a 1797 PL_op = (OP*)&myop;
aa689395 1798
3280af22
NIS		 1799 EXTEND(PL_stack_sp, 1);
1800 *++PL_stack_sp = sv;
aa689395 1801 oldmark = TOPMARK;
3280af22 1802 oldscope = PL_scopestack_ix;
a0d0e21e 1803
3280af22 1804 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1805 /* Handle first BEGIN of -d. */
3280af22 1806 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24 1807 /* Try harder, since this may have been a sighandler, thus
1808 * curstash may be meaningless. */
3280af22 1809 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1810 && !(flags & G_NODEBUG))
533c011a 1811 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1812
968b3946
GS		 1813 if (flags & G_METHOD) {
1814 Zero(&method_op, 1, UNOP);
1815 method_op.op_next = PL_op;
1816 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1817 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1818 PL_op = (OP*)&method_op;
968b3946
GS		 1819 }
1820
312caa8e 1821 if (!(flags & G_EVAL)) {
0cdb2077 1822 CATCH_SET(TRUE);
14dd3ad8 1823 call_body((OP*)&myop, FALSE);
312caa8e 1824 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1825 CATCH_SET(oldcatch);
312caa8e
CS		 1826 }
1827 else {
d78bda3d 1828 myop.op_other = (OP*)&myop;
3280af22 1829 PL_markstack_ptr--;
4633a7c4
LW		 1830 /* we're trying to emulate pp_entertry() here */
1831 {
c09156bb 1832 register PERL_CONTEXT *cx;
54310121 1833 I32 gimme = GIMME_V;
ac27b0f5 1834
4633a7c4
LW		 1835 ENTER;
1836 SAVETMPS;
ac27b0f5 1837
968b3946 1838 push_return(Nullop);
1d76a5c3 1839 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1840 PUSHEVAL(cx, 0, 0);
533c011a 1841 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1842
faef0170 1843 PL_in_eval = EVAL_INEVAL;
4633a7c4 1844 if (flags & G_KEEPERR)
faef0170 1845 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1846 else
38a03e6e 1847 sv_setpv(ERRSV,"");
4633a7c4 1848 }
3280af22 1849 PL_markstack_ptr++;
a0d0e21e 1850
14dd3ad8
GS		 1851#ifdef PERL_FLEXIBLE_EXCEPTIONS
1852 redo_body:
1853 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1854 (OP*)&myop, FALSE);
14dd3ad8
GS		 1855#else
1856 JMPENV_PUSH(ret);
1857#endif
6224f72b
GS		 1858 switch (ret) {
1859 case 0:
14dd3ad8
GS		 1860#ifndef PERL_FLEXIBLE_EXCEPTIONS
1861 redo_body:
1862 call_body((OP*)&myop, FALSE);
1863#endif
312caa8e
CS		 1864 retval = PL_stack_sp - (PL_stack_base + oldmark);
1865 if (!(flags & G_KEEPERR))
1866 sv_setpv(ERRSV,"");
a0d0e21e 1867 break;
6224f72b 1868 case 1:
f86702cc 1869 STATUS_ALL_FAILURE;
a0d0e21e 1870 /* FALL THROUGH */
6224f72b 1871 case 2:
a0d0e21e 1872 /* my_exit() was called */
3280af22 1873 PL_curstash = PL_defstash;
a0d0e21e 1874 FREETMPS;
14dd3ad8 1875 JMPENV_POP;
cc3604b1 1876 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1877 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1878 my_exit_jump();
a0d0e21e 1879 /* NOTREACHED */
6224f72b 1880 case 3:
3280af22 1881 if (PL_restartop) {
533c011a 1882 PL_op = PL_restartop;
3280af22 1883 PL_restartop = 0;
312caa8e 1884 goto redo_body;
a0d0e21e 1885 }
3280af22 1886 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1887 if (flags & G_ARRAY)
1888 retval = 0;
1889 else {
1890 retval = 1;
3280af22 1891 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1892 }
312caa8e 1893 break;
a0d0e21e 1894 }
a0d0e21e 1895
3280af22 1896 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW		 1897 SV **newsp;
1898 PMOP *newpm;
1899 I32 gimme;
c09156bb 1900 register PERL_CONTEXT *cx;
a0a2876f
LW		 1901 I32 optype;
1902
1903 POPBLOCK(cx,newpm);
1904 POPEVAL(cx);
1905 pop_return();
3280af22 1906 PL_curpm = newpm;
a0a2876f 1907 LEAVE;
a0d0e21e 1908 }
14dd3ad8 1909 JMPENV_POP;
a0d0e21e 1910 }
1e422769 1911
a0d0e21e 1912 if (flags & G_DISCARD) {
3280af22 1913 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1914 retval = 0;
1915 FREETMPS;
1916 LEAVE;
1917 }
533c011a 1918 PL_op = oldop;
a0d0e21e
LW		 1919 return retval;
1920}
1921
14dd3ad8 1922#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1923STATIC void *
14dd3ad8 1924S_vcall_body(pTHX_ va_list args)
312caa8e
CS		 1925{
1926 OP *myop = va_arg(args, OP*);
1927 int is_eval = va_arg(args, int);
1928
14dd3ad8 1929 call_body(myop, is_eval);
312caa8e
CS		 1930 return NULL;
1931}
14dd3ad8 1932#endif
312caa8e
CS		 1933
1934STATIC void
14dd3ad8 1935S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1936{
312caa8e
CS		 1937 if (PL_op == myop) {
1938 if (is_eval)
f807eda9 1939 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1940 else
f807eda9 1941 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS		 1942 }
1943 if (PL_op)
cea2e8a9 1944 CALLRUNOPS(aTHX);
312caa8e
CS		 1945}
1946
6e72f9df 1947/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1948
954c1994
GS		 1949/*
1950=for apidoc p||eval_sv
1951
1952Tells Perl to C<eval> the string in the SV.
1953
1954=cut
1955*/
1956
a0d0e21e 1957I32
864dbfa3 1958Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1959
8ac85365 1960 /* See G_* flags in cop.h */
a0d0e21e 1961{
924508f0 1962 dSP;
a0d0e21e 1963 UNOP myop; /* fake syntax tree node */
8fa7f367 1964 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1965 volatile I32 retval = 0;
4633a7c4 1966 I32 oldscope;
6224f72b 1967 int ret;
533c011a 1968 OP* oldop = PL_op;
db36c5a1 1969 dJMPENV;
84902520 1970
4633a7c4
LW		 1971 if (flags & G_DISCARD) {
1972 ENTER;
1973 SAVETMPS;
1974 }
1975
462e5cf6 1976 SAVEOP();
533c011a
NIS		 1977 PL_op = (OP*)&myop;
1978 Zero(PL_op, 1, UNOP);
3280af22
NIS		 1979 EXTEND(PL_stack_sp, 1);
1980 *++PL_stack_sp = sv;
1981 oldscope = PL_scopestack_ix;
79072805 1982
4633a7c4
LW		 1983 if (!(flags & G_NOARGS))
1984 myop.op_flags = OPf_STACKED;
79072805 1985 myop.op_next = Nullop;
6e72f9df 1986 myop.op_type = OP_ENTEREVAL;
54310121 1987 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1988 (flags & G_ARRAY) ? OPf_WANT_LIST :
1989 OPf_WANT_SCALAR);
6e72f9df 1990 if (flags & G_KEEPERR)
1991 myop.op_flags |= OPf_SPECIAL;
4633a7c4 1992
14dd3ad8 1993#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1994 redo_body:
14dd3ad8 1995 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1996 (OP*)&myop, TRUE);
14dd3ad8
GS		 1997#else
1998 JMPENV_PUSH(ret);
1999#endif
6224f72b
GS		 2000 switch (ret) {
2001 case 0:
14dd3ad8
GS		 2002#ifndef PERL_FLEXIBLE_EXCEPTIONS
2003 redo_body:
2004 call_body((OP*)&myop,TRUE);
2005#endif
312caa8e
CS		 2006 retval = PL_stack_sp - (PL_stack_base + oldmark);
2007 if (!(flags & G_KEEPERR))
2008 sv_setpv(ERRSV,"");
4633a7c4 2009 break;
6224f72b 2010 case 1:
f86702cc 2011 STATUS_ALL_FAILURE;
4633a7c4 2012 /* FALL THROUGH */
6224f72b 2013 case 2:
4633a7c4 2014 /* my_exit() was called */
3280af22 2015 PL_curstash = PL_defstash;
4633a7c4 2016 FREETMPS;
14dd3ad8 2017 JMPENV_POP;
cc3604b1 2018 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2019 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2020 my_exit_jump();
4633a7c4 2021 /* NOTREACHED */
6224f72b 2022 case 3:
3280af22 2023 if (PL_restartop) {
533c011a 2024 PL_op = PL_restartop;
3280af22 2025 PL_restartop = 0;
312caa8e 2026 goto redo_body;
4633a7c4 2027 }
3280af22 2028 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2029 if (flags & G_ARRAY)
2030 retval = 0;
2031 else {
2032 retval = 1;
3280af22 2033 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2034 }
312caa8e 2035 break;
4633a7c4
LW		 2036 }
2037
14dd3ad8 2038 JMPENV_POP;
4633a7c4 2039 if (flags & G_DISCARD) {
3280af22 2040 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2041 retval = 0;
2042 FREETMPS;
2043 LEAVE;
2044 }
533c011a 2045 PL_op = oldop;
4633a7c4
LW		 2046 return retval;
2047}
2048
954c1994
GS		 2049/*
2050=for apidoc p||eval_pv
2051
2052Tells Perl to C<eval> the given string and return an SV* result.
2053
2054=cut
2055*/
2056
137443ea 2057SV*
864dbfa3 2058Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 2059{
2060 dSP;
2061 SV* sv = newSVpv(p, 0);
2062
864dbfa3 2063 eval_sv(sv, G_SCALAR);
137443ea 2064 SvREFCNT_dec(sv);
2065
2066 SPAGAIN;
2067 sv = POPs;
2068 PUTBACK;
2069
2d8e6c8d
GS		 2070 if (croak_on_error && SvTRUE(ERRSV)) {
2071 STRLEN n_a;
cea2e8a9 2072 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2073 }
137443ea 2074
2075 return sv;
2076}
2077
4633a7c4
LW		 2078/* Require a module. */
2079
954c1994
GS		 2080/*
2081=for apidoc p||require_pv
2082
7d3fb230
BS		 2083Tells Perl to C<require> the file named by the string argument. It is
2084analogous to the Perl code C<eval "require '$file'">. It's even
2085implemented that way; consider using Perl_load_module instead.
954c1994 2086
7d3fb230 2087=cut */
954c1994 2088
4633a7c4 2089void
864dbfa3 2090Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2091{
d3acc0f7
JP		 2092 SV* sv;
2093 dSP;
e788e7d3 2094 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP		 2095 PUTBACK;
2096 sv = sv_newmortal();
4633a7c4
LW		 2097 sv_setpv(sv, "require '");
2098 sv_catpv(sv, pv);
2099 sv_catpv(sv, "'");
864dbfa3 2100 eval_sv(sv, G_DISCARD);
d3acc0f7
JP		 2101 SPAGAIN;
2102 POPSTACK;
79072805
LW		 2103}
2104
79072805 2105void
864dbfa3 2106Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW		 2107{
2108 register GV *gv;
2109
155aba94 2110 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2111 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW		 2112}
2113
76e3520e 2114STATIC void
cea2e8a9 2115S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2116{
ab821d7f 2117 /* This message really ought to be max 23 lines.
75c72d73 2118 * Removed -h because the user already knows that option. Others? */
fb73857a 2119
76e3520e 2120 static char *usage_msg[] = {
fb73857a 2121"-0[octal] specify record separator (\\0, if no argument)",
2122"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2123"-C enable native wide character system interfaces",
1950ee41 2124"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS		 2125"-d[:debugger] run program under debugger",
2126"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2127"-e 'command' one line of program (several -e's allowed, omit programfile)",
2128"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2129"-i[extension] edit <> files in place (makes backup if extension supplied)",
2130"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2131"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS		 2132"-[mM][-]module execute `use/no module...' before executing program",
2133"-n assume 'while (<>) { ... }' loop around program",
2134"-p assume loop like -n but print line also, like sed",
2135"-P run program through C preprocessor before compilation",
2136"-s enable rudimentary parsing for switches after programfile",
2137"-S look for programfile using PATH environment variable",
2138"-T enable tainting checks",
2139"-u dump core after parsing program",
fb73857a 2140"-U allow unsafe operations",
aac3bd0d
GS		 2141"-v print version, subversion (includes VERY IMPORTANT perl info)",
2142"-V[:variable] print configuration summary (or a single Config.pm variable)",
2143"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS		 2144"-W enable all warnings",
2145"-X disable all warnings",
fb73857a 2146"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2147"\n",
2148NULL
2149};
76e3520e 2150 char **p = usage_msg;
fb73857a 2151
b0e47665
GS		 2152 PerlIO_printf(PerlIO_stdout(),
2153 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2154 name);
fb73857a 2155 while (*p)
b0e47665 2156 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW		 2157}
2158
79072805
LW		 2159/* This routine handles any switches that can be given during run */
2160
2161char *
864dbfa3 2162Perl_moreswitches(pTHX_ char *s)
79072805 2163{
ba210ebe 2164 STRLEN numlen;
c07a80fd 2165 U32 rschar;
79072805
LW		 2166
2167 switch (*s) {
2168 case '0':
a863c7d1 2169 {
b21ed0a9 2170 numlen = 0; /* disallow underscores */
dff6d3cd 2171 rschar = (U32)scan_oct(s, 4, &numlen);
3280af22 2172 SvREFCNT_dec(PL_nrs);
c07a80fd 2173 if (rschar & ~((U8)~0))
3280af22 2174 PL_nrs = &PL_sv_undef;
c07a80fd 2175 else if (!rschar && numlen >= 2)
79cb57f6 2176 PL_nrs = newSVpvn("", 0);
c07a80fd 2177 else {
2178 char ch = rschar;
79cb57f6 2179 PL_nrs = newSVpvn(&ch, 1);
79072805
LW		 2180 }
2181 return s + numlen;
a863c7d1 2182 }
46487f74
GS		 2183 case 'C':
2184 PL_widesyscalls = TRUE;
2185 s++;
2186 return s;
2304df62 2187 case 'F':
3280af22
NIS		 2188 PL_minus_F = TRUE;
2189 PL_splitstr = savepv(s + 1);
2304df62
AD		 2190 s += strlen(s);
2191 return s;
79072805 2192 case 'a':
3280af22 2193 PL_minus_a = TRUE;
79072805
LW		 2194 s++;
2195 return s;
2196 case 'c':
3280af22 2197 PL_minus_c = TRUE;
79072805
LW		 2198 s++;
2199 return s;
2200 case 'd':
bbce6d69 2201 forbid_setid("-d");
4633a7c4 2202 s++;
70c94a19
RR		 2203 /* The following permits -d:Mod to accepts arguments following an =
2204 in the fashion that -MSome::Mod does. */
2205 if (*s == ':' || *s == '=') {
2206 char *start;
2207 SV *sv;
2208 sv = newSVpv("use Devel::", 0);
2209 start = ++s;
2210 /* We now allow -d:Module=Foo,Bar */
2211 while(isALNUM(*s) || *s==':') ++s;
2212 if (*s != '=')
2213 sv_catpv(sv, start);
2214 else {
2215 sv_catpvn(sv, start, s-start);
2216 sv_catpv(sv, " split(/,/,q{");
2217 sv_catpv(sv, ++s);
2218 sv_catpv(sv, "})");
2219 }
4633a7c4 2220 s += strlen(s);
70c94a19 2221 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2222 }
ed094faf 2223 if (!PL_perldb) {
3280af22 2224 PL_perldb = PERLDB_ALL;
a0d0e21e 2225 init_debugger();
ed094faf 2226 }
79072805
LW		 2227 return s;
2228 case 'D':
0453d815 2229 {
79072805 2230#ifdef DEBUGGING
bbce6d69 2231 forbid_setid("-D");
79072805 2232 if (isALPHA(s[1])) {
04932ac8
DM		 2233 /* if adding extra options, remember to update DEBUG_MASK */
2234 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW		 2235 char *d;
2236
93a17b20 2237 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2238 PL_debug |= 1 << (d - debopts);
79072805
LW		 2239 }
2240 else {
3280af22 2241 PL_debug = atoi(s+1);
79072805
LW		 2242 for (s++; isDIGIT(*s); s++) ;
2243 }
aea4f609 2244 PL_debug |= DEBUG_TOP_FLAG;
79072805 2245#else
0453d815
PM		 2246 if (ckWARN_d(WARN_DEBUGGING))
2247 Perl_warner(aTHX_ WARN_DEBUGGING,
2248 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2249 for (s++; isALNUM(*s); s++) ;
79072805
LW		 2250#endif
2251 /*SUPPRESS 530*/
2252 return s;
0453d815 2253 }
4633a7c4 2254 case 'h':
ac27b0f5 2255 usage(PL_origargv[0]);
6ad3d225 2256 PerlProc_exit(0);
79072805 2257 case 'i':
3280af22
NIS		 2258 if (PL_inplace)
2259 Safefree(PL_inplace);
2260 PL_inplace = savepv(s+1);
79072805 2261 /*SUPPRESS 530*/
3280af22 2262 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2263 if (*s) {
fb73857a 2264 *s++ = '\0';
7b8d334a
GS		 2265 if (*s == '-') /* Additional switches on #! line. */
2266 s++;
2267 }
fb73857a 2268 return s;
2269 case 'I': /* -I handled both here and in parse_perl() */
bbce6d69 2270 forbid_setid("-I");
fb73857a 2271 ++s;
2272 while (*s && isSPACE(*s))
2273 ++s;
2274 if (*s) {
774d564b 2275 char *e, *p;
0df16ed7
GS		 2276 p = s;
2277 /* ignore trailing spaces (possibly followed by other switches) */
2278 do {
2279 for (e = p; *e && !isSPACE(*e); e++) ;
2280 p = e;
2281 while (isSPACE(*p))
2282 p++;
2283 } while (*p && *p != '-');
2284 e = savepvn(s, e-s);
9c8a64f0 2285 incpush(e, TRUE, TRUE);
0df16ed7
GS		 2286 Safefree(e);
2287 s = p;
2288 if (*s == '-')
2289 s++;
79072805
LW		 2290 }
2291 else
a67e862a 2292 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2293 return s;
79072805 2294 case 'l':
3280af22 2295 PL_minus_l = TRUE;
79072805 2296 s++;
7889fe52
NIS		 2297 if (PL_ors_sv) {
2298 SvREFCNT_dec(PL_ors_sv);
2299 PL_ors_sv = Nullsv;
2300 }
79072805 2301 if (isDIGIT(*s)) {
7889fe52 2302 PL_ors_sv = newSVpvn("\n",1);
b21ed0a9 2303 numlen = 0; /* disallow underscores */
7889fe52 2304 *SvPVX(PL_ors_sv) = (char)scan_oct(s, 3 + (*s == '0'), &numlen);
79072805
LW		 2305 s += numlen;
2306 }
2307 else {
3280af22 2308 if (RsPARA(PL_nrs)) {
7889fe52
NIS		 2309 PL_ors_sv = newSVpvn("\n\n",2);
2310 }
2311 else {
2312 PL_ors_sv = newSVsv(PL_nrs);
c07a80fd 2313 }
79072805
LW		 2314 }
2315 return s;
1a30305b 2316 case 'M':
bbce6d69 2317 forbid_setid("-M"); /* XXX ? */
1a30305b 2318 /* FALL THROUGH */
2319 case 'm':
bbce6d69 2320 forbid_setid("-m"); /* XXX ? */
1a30305b 2321 if (*++s) {
a5f75d66 2322 char *start;
11343788 2323 SV *sv;
a5f75d66
AD		 2324 char *use = "use ";
2325 /* -M-foo == 'no foo' */
2326 if (*s == '-') { use = "no "; ++s; }
11343788 2327 sv = newSVpv(use,0);
a5f75d66 2328 start = s;
1a30305b 2329 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd 2330 while(isALNUM(*s) || *s==':') ++s;
2331 if (*s != '=') {
11343788 2332 sv_catpv(sv, start);
c07a80fd 2333 if (*(start-1) == 'm') {
2334 if (*s != '\0')
cea2e8a9 2335 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2336 sv_catpv( sv, " ()");
c07a80fd 2337 }
2338 } else {
6df41af2 2339 if (s == start)
be98fb35
GS		 2340 Perl_croak(aTHX_ "Module name required with -%c option",
2341 s[-1]);
11343788
MB		 2342 sv_catpvn(sv, start, s-start);
2343 sv_catpv(sv, " split(/,/,q{");
2344 sv_catpv(sv, ++s);
2345 sv_catpv(sv, "})");
c07a80fd 2346 }
1a30305b 2347 s += strlen(s);
5c831c24 2348 if (!PL_preambleav)
3280af22
NIS		 2349 PL_preambleav = newAV();
2350 av_push(PL_preambleav, sv);
1a30305b 2351 }
2352 else
cea2e8a9 2353 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2354 return s;
79072805 2355 case 'n':
3280af22 2356 PL_minus_n = TRUE;
79072805
LW		 2357 s++;
2358 return s;
2359 case 'p':
3280af22 2360 PL_minus_p = TRUE;
79072805
LW		 2361 s++;
2362 return s;
2363 case 's':
bbce6d69 2364 forbid_setid("-s");
3280af22 2365 PL_doswitches = TRUE;
79072805
LW		 2366 s++;
2367 return s;
463ee0b2 2368 case 'T':
3280af22 2369 if (!PL_tainting)
cea2e8a9 2370 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW		 2371 s++;
2372 return s;
79072805 2373 case 'u':
bf4acbe4
GS		 2374#ifdef MACOS_TRADITIONAL
2375 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2376#endif
3280af22 2377 PL_do_undump = TRUE;
79072805
LW		 2378 s++;
2379 return s;
2380 case 'U':
3280af22 2381 PL_unsafe = TRUE;
79072805
LW		 2382 s++;
2383 return s;
2384 case 'v':
8e9464f1 2385#if !defined(DGUX)
b0e47665 2386 PerlIO_printf(PerlIO_stdout(),
d2560b70 2387 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2388 PL_patchlevel, ARCHNAME));
8e9464f1
JH		 2389#else /* DGUX */
2390/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2391 PerlIO_printf(PerlIO_stdout(),
2392 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2393 PerlIO_printf(PerlIO_stdout(),
2394 Perl_form(aTHX_ " built under %s at %s %s\n",
2395 OSNAME, __DATE__, __TIME__));
2396 PerlIO_printf(PerlIO_stdout(),
2397 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2398 OSVERS));
8e9464f1
JH		 2399#endif /* !DGUX */
2400
fb73857a 2401#if defined(LOCAL_PATCH_COUNT)
2402 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS		 2403 PerlIO_printf(PerlIO_stdout(),
2404 "\n(with %d registered patch%s, "
2405 "see perl -V for more detail)",
2406 (int)LOCAL_PATCH_COUNT,
2407 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2408#endif
1a30305b 2409
b0e47665 2410 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2411 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH		 2412#ifdef MACOS_TRADITIONAL
2413 PerlIO_printf(PerlIO_stdout(),
084592ab 2414 "\nMac OS port Copyright (c) 1991-2001, Matthias Neeracher\n");
eae9c151 2415#endif
79072805 2416#ifdef MSDOS
b0e47665
GS		 2417 PerlIO_printf(PerlIO_stdout(),
2418 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff 2419#endif
2420#ifdef DJGPP
b0e47665
GS		 2421 PerlIO_printf(PerlIO_stdout(),
2422 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2423 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2424#endif
79072805 2425#ifdef OS2
b0e47665
GS		 2426 PerlIO_printf(PerlIO_stdout(),
2427 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2428 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2429#endif
79072805 2430#ifdef atarist
b0e47665
GS		 2431 PerlIO_printf(PerlIO_stdout(),
2432 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2433#endif
a3f9223b 2434#ifdef __BEOS__
b0e47665
GS		 2435 PerlIO_printf(PerlIO_stdout(),
2436 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2437#endif
1d84e8df 2438#ifdef MPE
b0e47665 2439 PerlIO_printf(PerlIO_stdout(),
dc22e1c4 2440 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2001\n");
1d84e8df 2441#endif
9d116dd7 2442#ifdef OEMVS
b0e47665
GS		 2443 PerlIO_printf(PerlIO_stdout(),
2444 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2445#endif
495c5fdc 2446#ifdef __VOS__
b0e47665
GS		 2447 PerlIO_printf(PerlIO_stdout(),
2448 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2449#endif
092bebab 2450#ifdef __OPEN_VM
b0e47665
GS		 2451 PerlIO_printf(PerlIO_stdout(),
2452 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2453#endif
a1a0e61e 2454#ifdef POSIX_BC
b0e47665
GS		 2455 PerlIO_printf(PerlIO_stdout(),
2456 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2457#endif
61ae2fbf 2458#ifdef __MINT__
b0e47665
GS		 2459 PerlIO_printf(PerlIO_stdout(),
2460 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2461#endif
f83d2536 2462#ifdef EPOC
b0e47665
GS		 2463 PerlIO_printf(PerlIO_stdout(),
2464 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2465#endif
e1caacb4
JH		 2466#ifdef UNDER_CE
2467 printf("WINCE port by Rainer Keuchel, 2001\n");
2468 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2469 wce_hitreturn();
2470#endif
baed7233
DL		 2471#ifdef BINARY_BUILD_NOTICE
2472 BINARY_BUILD_NOTICE;
2473#endif
b0e47665
GS		 2474 PerlIO_printf(PerlIO_stdout(),
2475 "\n\
79072805 2476Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2477GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS		 2478Complete documentation for Perl, including FAQ lists, should be found on\n\
2479this system using `man perl' or `perldoc perl'. If you have access to the\n\
2480Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2481 PerlProc_exit(0);
79072805 2482 case 'w':
599cee73 2483 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2484 PL_dowarn |= G_WARN_ON;
599cee73
PM		 2485 s++;
2486 return s;
2487 case 'W':
ac27b0f5 2488 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
d3a7d8c7 2489 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM		 2490 s++;
2491 return s;
2492 case 'X':
ac27b0f5 2493 PL_dowarn = G_WARN_ALL_OFF;
d3a7d8c7 2494 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW		 2495 s++;
2496 return s;
a0d0e21e 2497 case '*':
79072805
LW		 2498 case ' ':
2499 if (s[1] == '-') /* Additional switches on #! line. */
2500 return s+2;
2501 break;
a0d0e21e 2502 case '-':
79072805 2503 case 0:
51882d45 2504#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS		 2505 case '\r':
2506#endif
79072805
LW		 2507 case '\n':
2508 case '\t':
2509 break;
aa689395 2510#ifdef ALTERNATE_SHEBANG
2511 case 'S': /* OS/2 needs -S on "extproc" line. */
2512 break;
2513#endif
a0d0e21e 2514 case 'P':
3280af22 2515 if (PL_preprocess)
a0d0e21e
LW		 2516 return s+1;
2517 /* FALL THROUGH */
79072805 2518 default:
cea2e8a9 2519 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW		 2520 }
2521 return Nullch;
2522}
2523
2524/* compliments of Tom Christiansen */
2525
2526/* unexec() can be found in the Gnu emacs distribution */
ee580363 2527/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW		 2528
2529void
864dbfa3 2530Perl_my_unexec(pTHX)
79072805
LW		 2531{
2532#ifdef UNEXEC
46fc3d4c 2533 SV* prog;
2534 SV* file;
ee580363 2535 int status = 1;
79072805
LW		 2536 extern int etext;
2537
ee580363 2538 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2539 sv_catpv(prog, "/perl");
6b88bc9c 2540 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2541 sv_catpv(file, ".perldump");
79072805 2542
ee580363
GS		 2543 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2544 /* unexec prints msg to stderr in case of failure */
6ad3d225 2545 PerlProc_exit(status);
79072805 2546#else
a5f75d66
AD		 2547# ifdef VMS
2548# include <lib$routines.h>
2549 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2550# else
79072805 2551 ABORT(); /* for use with undump */
aa689395 2552# endif
a5f75d66 2553#endif
79072805
LW		 2554}
2555
cb68f92d
GS		 2556/* initialize curinterp */
2557STATIC void
cea2e8a9 2558S_init_interp(pTHX)
cb68f92d
GS		 2559{
2560
066ef5b5 2561#ifdef PERL_OBJECT /* XXX kludge */
cb68f92d 2562#define I_REINIT \
6b88bc9c
GS		 2563 STMT_START { \
2564 PL_chopset = " \n-"; \
2565 PL_copline = NOLINE; \
2566 PL_curcop = &PL_compiling;\
2567 PL_curcopdb = NULL; \
2568 PL_dbargs = 0; \
3967c732 2569 PL_dumpindent = 4; \
6b88bc9c
GS		 2570 PL_laststatval = -1; \
2571 PL_laststype = OP_STAT; \
2572 PL_maxscream = -1; \
2573 PL_maxsysfd = MAXSYSFD; \
2574 PL_statname = Nullsv; \
2575 PL_tmps_floor = -1; \
2576 PL_tmps_ix = -1; \
2577 PL_op_mask = NULL; \
6b88bc9c
GS		 2578 PL_laststatval = -1; \
2579 PL_laststype = OP_STAT; \
2580 PL_mess_sv = Nullsv; \
2581 PL_splitstr = " "; \
2582 PL_generation = 100; \
2583 PL_exitlist = NULL; \
2584 PL_exitlistlen = 0; \
2585 PL_regindent = 0; \
2586 PL_in_clean_objs = FALSE; \
2587 PL_in_clean_all = FALSE; \
2588 PL_profiledata = NULL; \
2589 PL_rsfp = Nullfp; \
2590 PL_rsfp_filters = Nullav; \
24d3c518 2591 PL_dirty = FALSE; \
cb68f92d 2592 } STMT_END
9666903d 2593 I_REINIT;
066ef5b5
GS		 2594#else
2595# ifdef MULTIPLICITY
2596# define PERLVAR(var,type)
51371543 2597# define PERLVARA(var,n,type)
cea2e8a9 2598# if defined(PERL_IMPLICIT_CONTEXT)
54aff467
GS		 2599# if defined(USE_THREADS)
2600# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2601# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
2602# else /* !USE_THREADS */
2603# define PERLVARI(var,type,init) aTHX->var = init;
2604# define PERLVARIC(var,type,init) aTHX->var = init;
2605# endif /* USE_THREADS */
cea2e8a9 2606# else
c5be433b
GS		 2607# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2608# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
cea2e8a9 2609# endif
066ef5b5
GS		 2610# include "intrpvar.h"
2611# ifndef USE_THREADS
2612# include "thrdvar.h"
2613# endif
2614# undef PERLVAR
51371543 2615# undef PERLVARA
066ef5b5
GS		 2616# undef PERLVARI
2617# undef PERLVARIC
3967c732 2618# else
066ef5b5 2619# define PERLVAR(var,type)
51371543 2620# define PERLVARA(var,n,type)
533c011a
NIS		 2621# define PERLVARI(var,type,init) PL_##var = init;
2622# define PERLVARIC(var,type,init) PL_##var = init;
066ef5b5
GS		 2623# include "intrpvar.h"
2624# ifndef USE_THREADS
2625# include "thrdvar.h"
2626# endif
2627# undef PERLVAR
51371543 2628# undef PERLVARA
066ef5b5
GS		 2629# undef PERLVARI
2630# undef PERLVARIC
2631# endif
cb68f92d
GS		 2632#endif
2633
cb68f92d
GS		 2634}
2635
76e3520e 2636STATIC void
cea2e8a9 2637S_init_main_stash(pTHX)
79072805 2638{
463ee0b2 2639 GV *gv;
6e72f9df 2640
2641 /* Note that strtab is a rather special HV. Assumptions are made
2642 about not iterating on it, and not adding tie magic to it.
2643 It is properly deallocated in perl_destruct() */
3280af22 2644 PL_strtab = newHV();
5f08fbcd
GS		 2645#ifdef USE_THREADS
2646 MUTEX_INIT(&PL_strtab_mutex);
2647#endif
3280af22
NIS		 2648 HvSHAREKEYS_off(PL_strtab); /* mandatory */
2649 hv_ksplit(PL_strtab, 512);
ac27b0f5 2650
3280af22 2651 PL_curstash = PL_defstash = newHV();
79cb57f6 2652 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW		 2653 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2654 SvREFCNT_dec(GvHV(gv));
3280af22 2655 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2656 SvREADONLY_on(gv);
3280af22
NIS		 2657 HvNAME(PL_defstash) = savepv("main");
2658 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2659 GvMULTI_on(PL_incgv);
2660 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2661 GvMULTI_on(PL_hintgv);
2662 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2663 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2664 GvMULTI_on(PL_errgv);
2665 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2666 GvMULTI_on(PL_replgv);
cea2e8a9 2667 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB		 2668 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2669 sv_setpvn(ERRSV, "", 0);
3280af22 2670 PL_curstash = PL_defstash;
11faa288 2671 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2672 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2673 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2674 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2675 /* We must init $/ before switches are processed. */
864dbfa3 2676 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW		 2677}
2678
76e3520e 2679STATIC void
cea2e8a9 2680S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2681{
6c4ab083 2682 *fdscript = -1;
79072805 2683
3280af22
NIS		 2684 if (PL_e_script) {
2685 PL_origfilename = savepv("-e");
96436eeb 2686 }
6c4ab083
GS		 2687 else {
2688 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2689 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS		 2690
2691 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2692 char *s = scriptname + 8;
2693 *fdscript = atoi(s);
2694 while (isDIGIT(*s))
2695 s++;
2696 if (*s) {
2697 scriptname = savepv(s + 1);
3280af22
NIS		 2698 Safefree(PL_origfilename);
2699 PL_origfilename = scriptname;
6c4ab083
GS		 2700 }
2701 }
2702 }
2703
f4dd75d9
GS		 2704#ifdef USE_ITHREADS
2705 Safefree(CopFILE(PL_curcop));
2706#else
2707 SvREFCNT_dec(CopFILEGV(PL_curcop));
2708#endif
57843af0 2709 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2710 if (strEQ(PL_origfilename,"-"))
79072805 2711 scriptname = "";
01f988be 2712 if (*fdscript >= 0) {
3280af22 2713 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
96436eeb 2714#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS		 2715 if (PL_rsfp)
2716 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb 2717#endif
2718 }
3280af22 2719 else if (PL_preprocess) {
46fc3d4c 2720 char *cpp_cfg = CPPSTDIN;
79cb57f6 2721 SV *cpp = newSVpvn("",0);
46fc3d4c 2722 SV *cmd = NEWSV(0,0);
2723
2724 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2725 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2726 sv_catpv(cpp, cpp_cfg);
79072805 2727
0df16ed7 2728 sv_catpvn(sv, "-I", 2);
fed7345c 2729 sv_catpv(sv,PRIVLIB_EXP);
46fc3d4c 2730
14953ddc
MB		 2731 DEBUG_P(PerlIO_printf(Perl_debug_log,
2732 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2733 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
52853b95 2734#if defined(MSDOS) || defined(WIN32)
cea2e8a9 2735 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW		 2736sed %s -e \"/^[^#]/b\" \
2737 -e \"/^#[ ]*include[ ]/b\" \
2738 -e \"/^#[ ]*define[ ]/b\" \
2739 -e \"/^#[ ]*if[ ]/b\" \
2740 -e \"/^#[ ]*ifdef[ ]/b\" \
2741 -e \"/^#[ ]*ifndef[ ]/b\" \
2742 -e \"/^#[ ]*else/b\" \
2743 -e \"/^#[ ]*elif[ ]/b\" \
2744 -e \"/^#[ ]*undef[ ]/b\" \
2745 -e \"/^#[ ]*endif/b\" \
2746 -e \"s/^#.*//\" \
894356b3 2747 %s | %"SVf" -C %"SVf" %s",
6b88bc9c 2748 (PL_doextract ? "-e \"1,/^#/d\n\"" : ""),
79072805 2749#else
092bebab 2750# ifdef __OPEN_VM
cea2e8a9 2751 Perl_sv_setpvf(aTHX_ cmd, "\
092bebab
JH		 2752%s %s -e '/^[^#]/b' \
2753 -e '/^#[ ]*include[ ]/b' \
2754 -e '/^#[ ]*define[ ]/b' \
2755 -e '/^#[ ]*if[ ]/b' \
2756 -e '/^#[ ]*ifdef[ ]/b' \
2757 -e '/^#[ ]*ifndef[ ]/b' \
2758 -e '/^#[ ]*else/b' \
2759 -e '/^#[ ]*elif[ ]/b' \
2760 -e '/^#[ ]*undef[ ]/b' \
2761 -e '/^#[ ]*endif/b' \
2762 -e 's/^[ ]*#.*//' \
894356b3 2763 %s | %"SVf" %"SVf" %s",
092bebab 2764# else
cea2e8a9 2765 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW		 2766%s %s -e '/^[^#]/b' \
2767 -e '/^#[ ]*include[ ]/b' \
2768 -e '/^#[ ]*define[ ]/b' \
2769 -e '/^#[ ]*if[ ]/b' \
2770 -e '/^#[ ]*ifdef[ ]/b' \
2771 -e '/^#[ ]*ifndef[ ]/b' \
2772 -e '/^#[ ]*else/b' \
2773 -e '/^#[ ]*elif[ ]/b' \
2774 -e '/^#[ ]*undef[ ]/b' \
2775 -e '/^#[ ]*endif/b' \
2776 -e 's/^[ ]*#.*//' \
894356b3 2777 %s | %"SVf" -C %"SVf" %s",
092bebab 2778# endif
79072805
LW		 2779#ifdef LOC_SED
2780 LOC_SED,
2781#else
2782 "sed",
2783#endif
3280af22 2784 (PL_doextract ? "-e '1,/^#/d\n'" : ""),
79072805 2785#endif
46fc3d4c 2786 scriptname, cpp, sv, CPPMINUS);
3280af22 2787 PL_doextract = FALSE;
79072805 2788#ifdef IAMSUID /* actually, this is caught earlier */
b28d0864 2789 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
79072805 2790#ifdef HAS_SETEUID
b28d0864 2791 (void)seteuid(PL_uid); /* musn't stay setuid root */
79072805
LW		 2792#else
2793#ifdef HAS_SETREUID
b28d0864 2794 (void)setreuid((Uid_t)-1, PL_uid);
85e6fe83
LW		 2795#else
2796#ifdef HAS_SETRESUID
b28d0864 2797 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
79072805 2798#else
b28d0864 2799 PerlProc_setuid(PL_uid);
79072805
LW		 2800#endif
2801#endif
85e6fe83 2802#endif
b28d0864 2803 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2804 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805
LW		 2805 }
2806#endif /* IAMSUID */
3280af22 2807 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c 2808 SvREFCNT_dec(cmd);
2809 SvREFCNT_dec(cpp);
79072805
LW		 2810 }
2811 else if (!*scriptname) {
bbce6d69 2812 forbid_setid("program input from stdin");
3280af22 2813 PL_rsfp = PerlIO_stdin();
79072805 2814 }
96436eeb 2815 else {
3280af22 2816 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
96436eeb 2817#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS		 2818 if (PL_rsfp)
2819 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb 2820#endif
2821 }
3280af22 2822 if (!PL_rsfp) {
13281fa4 2823#ifdef DOSUID
a687059c 2824#ifndef IAMSUID /* in case script is not readable before setuid */
6b88bc9c 2825 if (PL_euid &&
cc49e20b 2826 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
6b88bc9c
GS		 2827 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2828 {
46fc3d4c 2829 /* try again */
a7cb1f99 2830 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 2831 (int)PERL_REVISION, (int)PERL_VERSION,
2832 (int)PERL_SUBVERSION), PL_origargv);
cea2e8a9 2833 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 2834 }
2835#endif
2836#endif
584d69ec
JH		 2837#ifdef IAMSUID
2838 errno = EPERM;
2839 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2840 Strerror(errno));
2841#else
cea2e8a9 2842 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
cc49e20b 2843 CopFILE(PL_curcop), Strerror(errno));
584d69ec 2844#endif
13281fa4 2845 }
79072805 2846}
8d063cd8 2847
7b89560d
JH		 2848/* Mention
2849 * I_SYSSTATVFS HAS_FSTATVFS
2850 * I_SYSMOUNT
c890dc6c 2851 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH		 2852 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2853 * here so that metaconfig picks them up. */
2854
104d25b7 2855#ifdef IAMSUID
864dbfa3 2856STATIC int
e688b231 2857S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2858{
0545a864
JH		 2859 int check_okay = 0; /* able to do all the required sys/libcalls */
2860 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2861/*
ad27e871 2862 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2863 * fstatvfs() is UNIX98.
0545a864 2864 * fstatfs() is 4.3 BSD.
ad27e871 2865 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH		 2866 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2867 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH		 2868 */
2869
6439433f
JH		 2870#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2871
2872# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2873 defined(HAS_FSTATVFS)
2874# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2875 struct statvfs stfs;
6439433f 2876
104d25b7
JH		 2877 check_okay = fstatvfs(fd, &stfs) == 0;
2878 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2879# endif /* fstatvfs */
ac27b0f5 2880
6439433f
JH		 2881# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2882 defined(PERL_MOUNT_NOSUID) && \
2883 defined(HAS_FSTATFS) && \
2884 defined(HAS_STRUCT_STATFS) && \
2885 defined(HAS_STRUCT_STATFS_F_FLAGS)
2886# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2887 struct statfs stfs;
6439433f 2888
104d25b7 2889 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2890 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH		 2891# endif /* fstatfs */
2892
2893# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2894 defined(PERL_MOUNT_NOSUID) && \
2895 defined(HAS_FSTAT) && \
2896 defined(HAS_USTAT) && \
2897 defined(HAS_GETMNT) && \
2898 defined(HAS_STRUCT_FS_DATA) && \
2899 defined(NOSTAT_ONE)
2900# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2901 struct stat fdst;
6439433f 2902
0545a864 2903 if (fstat(fd, &fdst) == 0) {
6439433f
JH		 2904 struct ustat us;
2905 if (ustat(fdst.st_dev, &us) == 0) {
2906 struct fs_data fsd;
2907 /* NOSTAT_ONE here because we're not examining fields which
2908 * vary between that case and STAT_ONE. */
ad27e871 2909 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH		 2910 size_t cmplen = sizeof(us.f_fname);
2911 if (sizeof(fsd.fd_req.path) < cmplen)
2912 cmplen = sizeof(fsd.fd_req.path);
2913 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2914 fdst.st_dev == fsd.fd_req.dev) {
2915 check_okay = 1;
2916 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2917 }
2918 }
2919 }
2920 }
0545a864 2921 }
6439433f
JH		 2922# endif /* fstat+ustat+getmnt */
2923
2924# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2925 defined(HAS_GETMNTENT) && \
2926 defined(HAS_HASMNTOPT) && \
2927 defined(MNTOPT_NOSUID)
2928# define FD_ON_NOSUID_CHECK_OKAY
2929 FILE *mtab = fopen("/etc/mtab", "r");
2930 struct mntent *entry;
2931 struct stat stb, fsb;
104d25b7
JH		 2932
2933 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH		 2934 while (entry = getmntent(mtab)) {
2935 if (stat(entry->mnt_dir, &fsb) == 0
2936 && fsb.st_dev == stb.st_dev)
2937 {
2938 /* found the filesystem */
2939 check_okay = 1;
2940 if (hasmntopt(entry, MNTOPT_NOSUID))
2941 on_nosuid = 1;
2942 break;
2943 } /* A single fs may well fail its stat(). */
2944 }
104d25b7
JH		 2945 }
2946 if (mtab)
6439433f
JH		 2947 fclose(mtab);
2948# endif /* getmntent+hasmntopt */
0545a864 2949
ac27b0f5 2950 if (!check_okay)
0545a864 2951 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH		 2952 return on_nosuid;
2953}
2954#endif /* IAMSUID */
2955
76e3520e 2956STATIC void
cea2e8a9 2957S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2958{
155aba94 2959#ifdef IAMSUID
96436eeb 2960 int which;
155aba94 2961#endif
96436eeb 2962
13281fa4
LW		 2963 /* do we need to emulate setuid on scripts? */
2964
2965 /* This code is for those BSD systems that have setuid #! scripts disabled
2966 * in the kernel because of a security problem. Merely defining DOSUID
2967 * in perl will not fix that problem, but if you have disabled setuid
2968 * scripts in the kernel, this will attempt to emulate setuid and setgid
2969 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW		 2970 * root version must be called suidperl or sperlN.NNN. If regular perl
2971 * discovers that it has opened a setuid script, it calls suidperl with
2972 * the same argv that it had. If suidperl finds that the script it has
2973 * just opened is NOT setuid root, it sets the effective uid back to the
2974 * uid. We don't just make perl setuid root because that loses the
2975 * effective uid we had before invoking perl, if it was different from the
2976 * uid.
13281fa4
LW		 2977 *
2978 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2979 * be defined in suidperl only. suidperl must be setuid root. The
2980 * Configure script will set this up for you if you want it.
2981 */
a687059c 2982
13281fa4 2983#ifdef DOSUID
6e72f9df 2984 char *s, *s2;
a0d0e21e 2985
b28d0864 2986 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2987 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2988 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2989 I32 len;
2d8e6c8d 2990 STRLEN n_a;
13281fa4 2991
a687059c 2992#ifdef IAMSUID
fe14fcc3 2993#ifndef HAS_SETREUID
a687059c
LW		 2994 /* On this access check to make sure the directories are readable,
2995 * there is actually a small window that the user could use to make
2996 * filename point to an accessible directory. So there is a faint
2997 * chance that someone could execute a setuid script down in a
2998 * non-accessible directory. I don't know what to do about that.
2999 * But I don't think it's too important. The manual lies when
3000 * it says access() is useful in setuid programs.
3001 */
cc49e20b 3002 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 3003 Perl_croak(aTHX_ "Permission denied");
a687059c
LW		 3004#else
3005 /* If we can swap euid and uid, then we can determine access rights
3006 * with a simple stat of the file, and then compare device and
3007 * inode to make sure we did stat() on the same file we opened.
3008 * Then we just have to make sure he or she can execute it.
3009 */
3010 {
3011 struct stat tmpstatbuf;
3012
85e6fe83
LW		 3013 if (
3014#ifdef HAS_SETREUID
b28d0864 3015 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW		 3016#else
3017# if HAS_SETRESUID
b28d0864 3018 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 3019# endif
85e6fe83 3020#endif
b28d0864 3021 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 3022 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 3023 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 3024 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 3025#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 3026 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 3027 Perl_croak(aTHX_ "Permission denied");
104d25b7 3028#endif
b28d0864
NIS		 3029 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3030 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3031 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3032 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3033 }
85e6fe83
LW		 3034 if (
3035#ifdef HAS_SETREUID
b28d0864 3036 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW		 3037#else
3038# if defined(HAS_SETRESUID)
b28d0864 3039 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3040# endif
85e6fe83 3041#endif
b28d0864 3042 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3043 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3044 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3045 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3046 }
fe14fcc3 3047#endif /* HAS_SETREUID */
a687059c
LW		 3048#endif /* IAMSUID */
3049
b28d0864 3050 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3051 Perl_croak(aTHX_ "Permission denied");
b28d0864 3052 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3053 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3054 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3055 CopLINE_inc(PL_curcop);
6b88bc9c 3056 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3057 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3058 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3059 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3060 if (*s == ' ') s++;
45d8adaa 3061 while (!isSPACE(*s)) s++;
2d8e6c8d 3062 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df 3063 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3064 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3065 Perl_croak(aTHX_ "Not a perl script");
a687059c 3066 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW		 3067 /*
3068 * #! arg must be what we saw above. They can invoke it by
3069 * mentioning suidperl explicitly, but they may not add any strange
3070 * arguments beyond what #! says if they do invoke suidperl that way.
3071 */
3072 len = strlen(validarg);
3073 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3074 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3075 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW		 3076
3077#ifndef IAMSUID
b28d0864
NIS		 3078 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3079 PL_euid == PL_statbuf.st_uid)
3080 if (!PL_do_undump)
cea2e8a9 3081 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3082FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3083#endif /* IAMSUID */
13281fa4 3084
b28d0864
NIS		 3085 if (PL_euid) { /* oops, we're not the setuid root perl */
3086 (void)PerlIO_close(PL_rsfp);
13281fa4 3087#ifndef IAMSUID
46fc3d4c 3088 /* try again */
a7cb1f99 3089 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3090 (int)PERL_REVISION, (int)PERL_VERSION,
3091 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3092#endif
cea2e8a9 3093 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 3094 }
3095
b28d0864 3096 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3097#ifdef HAS_SETEGID
b28d0864 3098 (void)setegid(PL_statbuf.st_gid);
a687059c 3099#else
fe14fcc3 3100#ifdef HAS_SETREGID
b28d0864 3101 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW		 3102#else
3103#ifdef HAS_SETRESGID
b28d0864 3104 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3105#else
b28d0864 3106 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW		 3107#endif
3108#endif
85e6fe83 3109#endif
b28d0864 3110 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3111 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3112 }
b28d0864
NIS		 3113 if (PL_statbuf.st_mode & S_ISUID) {
3114 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3115#ifdef HAS_SETEUID
b28d0864 3116 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3117#else
fe14fcc3 3118#ifdef HAS_SETREUID
b28d0864 3119 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW		 3120#else
3121#ifdef HAS_SETRESUID
b28d0864 3122 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3123#else
b28d0864 3124 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW		 3125#endif
3126#endif
85e6fe83 3127#endif
b28d0864 3128 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3129 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3130 }
b28d0864 3131 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3132#ifdef HAS_SETEUID
b28d0864 3133 (void)seteuid((Uid_t)PL_uid);
a687059c 3134#else
fe14fcc3 3135#ifdef HAS_SETREUID
b28d0864 3136 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3137#else
85e6fe83 3138#ifdef HAS_SETRESUID
b28d0864 3139 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3140#else
b28d0864 3141 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3142#endif
a687059c
LW		 3143#endif
3144#endif
b28d0864 3145 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3146 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3147 }
748a9306 3148 init_ids();
b28d0864 3149 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3150 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW		 3151 }
3152#ifdef IAMSUID
6b88bc9c 3153 else if (PL_preprocess)
cea2e8a9 3154 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3155 else if (fdscript >= 0)
cea2e8a9 3156 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3157 else
cea2e8a9 3158 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb 3159
3160 /* We absolutely must clear out any saved ids here, so we */
3161 /* exec the real perl, substituting fd script for scriptname. */
3162 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS		 3163 PerlIO_rewind(PL_rsfp);
3164 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS		 3165 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3166 if (!PL_origargv[which])
cea2e8a9
GS		 3167 Perl_croak(aTHX_ "Permission denied");
3168 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3169 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3170#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3171 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3172#endif
a7cb1f99 3173 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3174 (int)PERL_REVISION, (int)PERL_VERSION,
3175 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3176 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3177#endif /* IAMSUID */
a687059c 3178#else /* !DOSUID */
3280af22 3179 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3180#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS		 3181 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3182 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3183 ||
b28d0864 3184 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3185 )
b28d0864 3186 if (!PL_do_undump)
cea2e8a9 3187 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3188FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3189#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3190 /* not set-id, must be wrapped */
a687059c 3191 }
13281fa4 3192#endif /* DOSUID */
79072805 3193}
13281fa4 3194
76e3520e 3195STATIC void
cea2e8a9 3196S_find_beginning(pTHX)
79072805 3197{
6e72f9df 3198 register char *s, *s2;
33b78306
LW		 3199
3200 /* skip forward in input to the real script? */
3201
bbce6d69 3202 forbid_setid("-x");
bf4acbe4 3203#ifdef MACOS_TRADITIONAL
084592ab 3204 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3205
bf4acbe4
GS		 3206 while (PL_doextract || gMacPerl_AlwaysExtract) {
3207 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3208 if (!gMacPerl_AlwaysExtract)
3209 Perl_croak(aTHX_ "No Perl script found in input\n");
3210
3211 if (PL_doextract) /* require explicit override ? */
3212 if (!OverrideExtract(PL_origfilename))
3213 Perl_croak(aTHX_ "User aborted script\n");
3214 else
3215 PL_doextract = FALSE;
3216
3217 /* Pater peccavi, file does not have #! */
3218 PerlIO_rewind(PL_rsfp);
ac27b0f5 3219
bf4acbe4
GS		 3220 break;
3221 }
3222#else
3280af22
NIS		 3223 while (PL_doextract) {
3224 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3225 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3226#endif
4f0c37ba
IZ		 3227 s2 = s;
3228 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS		 3229 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3230 PL_doextract = FALSE;
6e72f9df 3231 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3232 s2 = s;
3233 while (*s == ' ' || *s == '\t') s++;
3234 if (*s++ == '-') {
3235 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3236 if (strnEQ(s2-4,"perl",4))
3237 /*SUPPRESS 530*/
155aba94
GS		 3238 while ((s = moreswitches(s)))
3239 ;
33b78306 3240 }
95e8664e
CN		 3241#ifdef MACOS_TRADITIONAL
3242 break;
3243#endif
83025b21
LW		 3244 }
3245 }
3246}
3247
afe37c7d 3248
76e3520e 3249STATIC void
cea2e8a9 3250S_init_ids(pTHX)
352d5a3a 3251{
d8eceb89
JH		 3252 PL_uid = PerlProc_getuid();
3253 PL_euid = PerlProc_geteuid();
3254 PL_gid = PerlProc_getgid();
3255 PL_egid = PerlProc_getegid();
748a9306 3256#ifdef VMS
b28d0864
NIS		 3257 PL_uid |= PL_gid << 16;
3258 PL_euid |= PL_egid << 16;
748a9306 3259#endif
3280af22 3260 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3261}
79072805 3262
76e3520e 3263STATIC void
cea2e8a9 3264S_forbid_setid(pTHX_ char *s)
bbce6d69 3265{
3280af22 3266 if (PL_euid != PL_uid)
cea2e8a9 3267 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3268 if (PL_egid != PL_gid)
cea2e8a9 3269 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69 3270}
3271
1ee4443e
IZ		 3272void
3273Perl_init_debugger(pTHX)
748a9306 3274{
1ee4443e
IZ		 3275 HV *ostash = PL_curstash;
3276
3280af22
NIS		 3277 PL_curstash = PL_debstash;
3278 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3279 AvREAL_off(PL_dbargs);
3280 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3281 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3282 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3283 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3284 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3285 sv_setiv(PL_DBsingle, 0);
3280af22 3286 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3287 sv_setiv(PL_DBtrace, 0);
3280af22 3288 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3289 sv_setiv(PL_DBsignal, 0);
1ee4443e 3290 PL_curstash = ostash;
352d5a3a
LW		 3291}
3292
2ce36478
SM		 3293#ifndef STRESS_REALLOC
3294#define REASONABLE(size) (size)
3295#else
3296#define REASONABLE(size) (1) /* unreasonable */
3297#endif
3298
11343788 3299void
cea2e8a9 3300Perl_init_stacks(pTHX)
79072805 3301{
e336de0d 3302 /* start with 128-item stack and 8K cxstack */
3280af22 3303 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3304 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS		 3305 PL_curstackinfo->si_type = PERLSI_MAIN;
3306 PL_curstack = PL_curstackinfo->si_stack;
3307 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3308
3280af22
NIS		 3309 PL_stack_base = AvARRAY(PL_curstack);
3310 PL_stack_sp = PL_stack_base;
3311 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3312
3280af22
NIS		 3313 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3314 PL_tmps_floor = -1;
3315 PL_tmps_ix = -1;
3316 PL_tmps_max = REASONABLE(128);
8990e307 3317
3280af22
NIS		 3318 New(54,PL_markstack,REASONABLE(32),I32);
3319 PL_markstack_ptr = PL_markstack;
3320 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3321
ce2f7c3b 3322 SET_MARK_OFFSET;
e336de0d 3323
3280af22
NIS		 3324 New(54,PL_scopestack,REASONABLE(32),I32);
3325 PL_scopestack_ix = 0;
3326 PL_scopestack_max = REASONABLE(32);
79072805 3327
3280af22
NIS		 3328 New(54,PL_savestack,REASONABLE(128),ANY);
3329 PL_savestack_ix = 0;
3330 PL_savestack_max = REASONABLE(128);
79072805 3331
3280af22
NIS		 3332 New(54,PL_retstack,REASONABLE(16),OP*);
3333 PL_retstack_ix = 0;
3334 PL_retstack_max = REASONABLE(16);
378cc40b 3335}
33b78306 3336
2ce36478
SM		 3337#undef REASONABLE
3338
76e3520e 3339STATIC void
cea2e8a9 3340S_nuke_stacks(pTHX)
6e72f9df 3341{
3280af22
NIS		 3342 while (PL_curstackinfo->si_next)
3343 PL_curstackinfo = PL_curstackinfo->si_next;
3344 while (PL_curstackinfo) {
3345 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3346 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS		 3347 Safefree(PL_curstackinfo->si_cxstack);
3348 Safefree(PL_curstackinfo);
3349 PL_curstackinfo = p;
e336de0d 3350 }
3280af22
NIS		 3351 Safefree(PL_tmps_stack);
3352 Safefree(PL_markstack);
3353 Safefree(PL_scopestack);
3354 Safefree(PL_savestack);
3355 Safefree(PL_retstack);
378cc40b 3356}
33b78306 3357
76e3520e 3358#ifndef PERL_OBJECT
760ac839 3359static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
76e3520e 3360#endif
7aa04957 3361
76e3520e 3362STATIC void
cea2e8a9 3363S_init_lexer(pTHX)
8990e307 3364{
76e3520e
GS		 3365#ifdef PERL_OBJECT
3366 PerlIO *tmpfp;
3367#endif
3280af22
NIS		 3368 tmpfp = PL_rsfp;
3369 PL_rsfp = Nullfp;
3370 lex_start(PL_linestr);
3371 PL_rsfp = tmpfp;
79cb57f6 3372 PL_subname = newSVpvn("main",4);
8990e307
LW		 3373}
3374
76e3520e 3375STATIC void
cea2e8a9 3376S_init_predump_symbols(pTHX)
45d8adaa 3377{
93a17b20 3378 GV *tmpgv;
af8c498a 3379 IO *io;
79072805 3380
864dbfa3 3381 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS		 3382 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3383 GvMULTI_on(PL_stdingv);
af8c498a 3384 io = GvIOp(PL_stdingv);
a04651f4 3385 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3386 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3387 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3388 GvMULTI_on(tmpgv);
af8c498a 3389 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3390
85e6fe83 3391 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3392 GvMULTI_on(tmpgv);
af8c498a 3393 io = GvIOp(tmpgv);
a04651f4 3394 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3395 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3396 setdefout(tmpgv);
adbc6bb1 3397 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3398 GvMULTI_on(tmpgv);
af8c498a 3399 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3400
bf49b057
GS		 3401 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3402 GvMULTI_on(PL_stderrgv);
3403 io = GvIOp(PL_stderrgv);
a04651f4 3404 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3405 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3406 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3407 GvMULTI_on(tmpgv);
af8c498a 3408 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3409
3280af22 3410 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3411
bf4acbe4
GS		 3412 if (PL_osname)
3413 Safefree(PL_osname);
3414 PL_osname = savepv(OSNAME);
79072805 3415}
33b78306 3416
76e3520e 3417STATIC void
cea2e8a9 3418S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
33b78306 3419{
79072805
LW		 3420 char *s;
3421 SV *sv;
3422 GV* tmpgv;
9cbac4c7 3423#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
516a5887 3424 char **dup_env_base = 0;
103a7189 3425 int dup_env_count = 0;
9cbac4c7 3426#endif
fe14fcc3 3427
79072805 3428 argc--,argv++; /* skip name of script */
3280af22 3429 if (PL_doswitches) {
79072805
LW		 3430 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3431 if (!argv[0][1])
3432 break;
379d538a 3433 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW		 3434 argc--,argv++;
3435 break;
3436 }
155aba94 3437 if ((s = strchr(argv[0], '='))) {
79072805 3438 *s++ = '\0';
85e6fe83 3439 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW		 3440 }
3441 else
85e6fe83 3442 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3443 }
79072805 3444 }
3280af22
NIS		 3445 PL_toptarget = NEWSV(0,0);
3446 sv_upgrade(PL_toptarget, SVt_PVFM);
3447 sv_setpvn(PL_toptarget, "", 0);
3448 PL_bodytarget = NEWSV(0,0);
3449 sv_upgrade(PL_bodytarget, SVt_PVFM);
3450 sv_setpvn(PL_bodytarget, "", 0);
3451 PL_formtarget = PL_bodytarget;
79072805 3452
bbce6d69 3453 TAINT;
155aba94 3454 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS		 3455#ifdef MACOS_TRADITIONAL
3456 /* $0 is not majick on a Mac */
3457 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3458#else
3280af22 3459 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3460 magicname("0", "0", 1);
bf4acbe4 3461#endif
79072805 3462 }
155aba94 3463 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV)))
ed344e4f 3464#ifdef OS2
23da6c43 3465 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
ed344e4f 3466#else
3280af22 3467 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
ed344e4f 3468#endif
155aba94 3469 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3280af22
NIS		 3470 GvMULTI_on(PL_argvgv);
3471 (void)gv_AVadd(PL_argvgv);
3472 av_clear(GvAVn(PL_argvgv));