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a0d0e21e
LW
1/* perl.c
2 *
bc89e66f 3 * Copyright (c) 1987-2001 Larry Wall
a687059c 4 *
352d5a3a
LW
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
a687059c 7 *
8d063cd8
LW
8 */
9
a0d0e21e
LW
10/*
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
12 */
45d8adaa 13
378cc40b 14#include "EXTERN.h"
864dbfa3 15#define PERL_IN_PERL_C
378cc40b 16#include "perl.h"
e3321bb0 17#include "patchlevel.h" /* for local_patches */
378cc40b 18
df5cef82 19/* XXX If this causes problems, set i_unistd=undef in the hint file. */
a0d0e21e
LW
20#ifdef I_UNISTD
21#include <unistd.h>
22#endif
a0d0e21e 23
7114a2d2 24#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
20ce7b12 25char *getenv (char *); /* Usually in <stdlib.h> */
54310121
PP
26#endif
27
acfe0abc 28static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
0cb96387 29
a687059c
LW
30#ifdef IAMSUID
31#ifndef DOSUID
32#define DOSUID
33#endif
34#endif
378cc40b 35
a687059c
LW
36#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
37#ifdef DOSUID
38#undef DOSUID
39#endif
40#endif
8d063cd8 41
4d1ff10f 42#if defined(USE_5005THREADS)
06d86050
GS
43# define INIT_TLS_AND_INTERP \
44 STMT_START { \
45 if (!PL_curinterp) { \
46 PERL_SET_INTERP(my_perl); \
47 INIT_THREADS; \
48 ALLOC_THREAD_KEY; \
49 } \
50 } STMT_END
51#else
52# if defined(USE_ITHREADS)
53# define INIT_TLS_AND_INTERP \
54 STMT_START { \
55 if (!PL_curinterp) { \
56 PERL_SET_INTERP(my_perl); \
57 INIT_THREADS; \
58 ALLOC_THREAD_KEY; \
534825c4
GS
59 PERL_SET_THX(my_perl); \
60 OP_REFCNT_INIT; \
61 } \
62 else { \
63 PERL_SET_THX(my_perl); \
06d86050 64 } \
06d86050
GS
65 } STMT_END
66# else
67# define INIT_TLS_AND_INTERP \
68 STMT_START { \
69 if (!PL_curinterp) { \
70 PERL_SET_INTERP(my_perl); \
71 } \
72 PERL_SET_THX(my_perl); \
73 } STMT_END
74# endif
75#endif
76
32e30700
GS
77#ifdef PERL_IMPLICIT_SYS
78PerlInterpreter *
7766f137
GS
79perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
80 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
32e30700
GS
81 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
82 struct IPerlDir* ipD, struct IPerlSock* ipS,
83 struct IPerlProc* ipP)
84{
85 PerlInterpreter *my_perl;
32e30700
GS
86 /* New() needs interpreter, so call malloc() instead */
87 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 88 INIT_TLS_AND_INTERP;
32e30700
GS
89 Zero(my_perl, 1, PerlInterpreter);
90 PL_Mem = ipM;
7766f137
GS
91 PL_MemShared = ipMS;
92 PL_MemParse = ipMP;
32e30700
GS
93 PL_Env = ipE;
94 PL_StdIO = ipStd;
95 PL_LIO = ipLIO;
96 PL_Dir = ipD;
97 PL_Sock = ipS;
98 PL_Proc = ipP;
7766f137 99
32e30700
GS
100 return my_perl;
101}
102#else
954c1994
GS
103
104/*
105=for apidoc perl_alloc
106
107Allocates a new Perl interpreter. See L<perlembed>.
108
109=cut
110*/
111
93a17b20 112PerlInterpreter *
cea2e8a9 113perl_alloc(void)
79072805 114{
cea2e8a9 115 PerlInterpreter *my_perl;
79072805 116
54aff467 117 /* New() needs interpreter, so call malloc() instead */
e8ee3774 118 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 119
06d86050 120 INIT_TLS_AND_INTERP;
dedcbb81 121 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 122 return my_perl;
79072805 123}
32e30700 124#endif /* PERL_IMPLICIT_SYS */
79072805 125
954c1994
GS
126/*
127=for apidoc perl_construct
128
129Initializes a new Perl interpreter. See L<perlembed>.
130
131=cut
132*/
133
79072805 134void
0cb96387 135perl_construct(pTHXx)
79072805 136{
4d1ff10f 137#ifdef USE_5005THREADS
a863c7d1 138#ifndef FAKE_THREADS
e1f15930 139 struct perl_thread *thr = NULL;
a863c7d1 140#endif /* FAKE_THREADS */
4d1ff10f 141#endif /* USE_5005THREADS */
ba869deb 142
8990e307 143#ifdef MULTIPLICITY
54aff467 144 init_interp();
ac27b0f5 145 PL_perl_destruct_level = 1;
54aff467
GS
146#else
147 if (PL_perl_destruct_level > 0)
148 init_interp();
149#endif
150
33f46ff6 151 /* Init the real globals (and main thread)? */
3280af22 152 if (!PL_linestr) {
4d1ff10f 153#ifdef USE_5005THREADS
533c011a 154 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB
155 /*
156 * Safe to use basic SV functions from now on (though
157 * not things like mortals or tainting yet).
158 */
533c011a
NIS
159 MUTEX_INIT(&PL_eval_mutex);
160 COND_INIT(&PL_eval_cond);
161 MUTEX_INIT(&PL_threads_mutex);
162 COND_INIT(&PL_nthreads_cond);
ba869deb 163# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 164 MUTEX_INIT(&PL_svref_mutex);
ba869deb 165# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 166
5ff3f7a4 167 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS
168 MUTEX_INIT(&PL_sv_lock_mutex);
169 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 170
199100c8 171 thr = init_main_thread();
4d1ff10f 172#endif /* USE_5005THREADS */
11343788 173
14dd3ad8 174#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 175 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 176#endif
312caa8e 177
2aea9f8a
GS
178 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
179
3280af22
NIS
180 PL_linestr = NEWSV(65,79);
181 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 182
3280af22 183 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP
184 /* set read-only and try to insure than we wont see REFCNT==0
185 very often */
186
3280af22
NIS
187 SvREADONLY_on(&PL_sv_undef);
188 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 189
3280af22
NIS
190 sv_setpv(&PL_sv_no,PL_No);
191 SvNV(&PL_sv_no);
192 SvREADONLY_on(&PL_sv_no);
193 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 194
3280af22
NIS
195 sv_setpv(&PL_sv_yes,PL_Yes);
196 SvNV(&PL_sv_yes);
197 SvREADONLY_on(&PL_sv_yes);
198 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 199 }
79072805 200
cea2e8a9 201 PL_sighandlerp = Perl_sighandler;
3280af22 202 PL_pidstatus = newHV();
44a8e56a 203
79072805
LW
204#ifdef MSDOS
205 /*
206 * There is no way we can refer to them from Perl so close them to save
207 * space. The other alternative would be to provide STDAUX and STDPRN
208 * filehandles.
209 */
2b96b0a5
JH
210 (void)PerlIO_close(PerlIO_importFILE(stdaux, 0));
211 (void)PerlIO_close(PerlIO_importFILE(stdprn, 0));
79072805
LW
212#endif
213 }
214
8bfdd7d9 215 PL_rs = newSVpvn("\n", 1);
dc92893f 216
cea2e8a9 217 init_stacks();
79072805 218
748a9306 219 init_ids();
3280af22 220 PL_lex_state = LEX_NOTPARSING;
a5f75d66 221
312caa8e 222 JMPENV_BOOTSTRAP;
f86702cc
PP
223 STATUS_ALL_SUCCESS;
224
0672f40e 225 init_i18nl10n(1);
36477c24 226 SET_NUMERIC_STANDARD();
0b5b802d 227
a7cb1f99
GS
228 {
229 U8 *s;
230 PL_patchlevel = NEWSV(0,4);
155aba94 231 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 232 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 233 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 234 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS
235 /* Build version strings using "native" characters */
236 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
237 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
238 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS
239 *s = '\0';
240 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
241 SvPOK_on(PL_patchlevel);
242 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
243 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 244#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 245 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 246#endif
a7cb1f99
GS
247 ;
248 SvNOK_on(PL_patchlevel); /* dual valued */
249 SvUTF8_on(PL_patchlevel);
250 SvREADONLY_on(PL_patchlevel);
251 }
79072805 252
ab821d7f 253#if defined(LOCAL_PATCH_COUNT)
3280af22 254 PL_localpatches = local_patches; /* For possible -v */
ab821d7f
PP
255#endif
256
52853b95
GS
257#ifdef HAVE_INTERP_INTERN
258 sys_intern_init();
259#endif
260
3a1ee7e8 261 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 262
3280af22
NIS
263 PL_fdpid = newAV(); /* for remembering popen pids by fd */
264 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 265 PL_errors = newSVpvn("",0);
1fcf4c12 266#ifdef USE_ITHREADS
13137afc
AB
267 PL_regex_padav = newAV();
268 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
269 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 270#endif
e5dd39fc
AB
271#ifdef USE_REENTRANT_API
272 New(31337, PL_reentrant_buffer,1, REBUF);
273 New(31337, PL_reentrant_buffer->tmbuff,1, struct tm);
274#endif
3d47000e
AB
275
276 /* Note that strtab is a rather special HV. Assumptions are made
277 about not iterating on it, and not adding tie magic to it.
278 It is properly deallocated in perl_destruct() */
279 PL_strtab = newHV();
280
281#ifdef USE_5005THREADS
282 MUTEX_INIT(&PL_strtab_mutex);
283#endif
284 HvSHAREKEYS_off(PL_strtab); /* mandatory */
285 hv_ksplit(PL_strtab, 512);
286
0631ea03
AB
287#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
288 _dyld_lookup_and_bind
289 ("__environ", (unsigned long *) &environ_pointer, NULL);
290#endif /* environ */
291
292#ifdef USE_ENVIRON_ARRAY
293 PL_origenviron = environ;
294#endif
295
8990e307 296 ENTER;
79072805
LW
297}
298
954c1994
GS
299/*
300=for apidoc perl_destruct
301
302Shuts down a Perl interpreter. See L<perlembed>.
303
304=cut
305*/
306
31d77e54 307int
0cb96387 308perl_destruct(pTHXx)
79072805 309{
7c474504 310 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 311 HV *hv;
4d1ff10f 312#ifdef USE_5005THREADS
33f46ff6 313 Thread t;
cea2e8a9 314 dTHX;
4d1ff10f 315#endif /* USE_5005THREADS */
8990e307 316
7766f137
GS
317 /* wait for all pseudo-forked children to finish */
318 PERL_WAIT_FOR_CHILDREN;
319
4d1ff10f 320#ifdef USE_5005THREADS
0f15f207 321#ifndef FAKE_THREADS
8023c3ce
MB
322 /* Pass 1 on any remaining threads: detach joinables, join zombies */
323 retry_cleanup:
533c011a 324 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 325 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 326 "perl_destruct: waiting for %d threads...\n",
533c011a 327 PL_nthreads - 1));
33f46ff6 328 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB
329 MUTEX_LOCK(&t->mutex);
330 switch (ThrSTATE(t)) {
331 AV *av;
c7848ba1 332 case THRf_ZOMBIE:
bf49b057 333 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 334 "perl_destruct: joining zombie %p\n", t));
605e5515
MB
335 ThrSETSTATE(t, THRf_DEAD);
336 MUTEX_UNLOCK(&t->mutex);
533c011a 337 PL_nthreads--;
8023c3ce
MB
338 /*
339 * The SvREFCNT_dec below may take a long time (e.g. av
340 * may contain an object scalar whose destructor gets
341 * called) so we have to unlock threads_mutex and start
342 * all over again.
343 */
533c011a 344 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 345 JOIN(t, &av);
605e5515 346 SvREFCNT_dec((SV*)av);
bf49b057 347 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 348 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 349 goto retry_cleanup;
c7848ba1 350 case THRf_R_JOINABLE:
bf49b057 351 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
352 "perl_destruct: detaching thread %p\n", t));
353 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 354 /*
c7848ba1
MB
355 * We unlock threads_mutex and t->mutex in the opposite order
356 * from which we locked them just so that DETACH won't
357 * deadlock if it panics. It's only a breach of good style
358 * not a bug since they are unlocks not locks.
359 */
533c011a 360 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB
361 DETACH(t);
362 MUTEX_UNLOCK(&t->mutex);
8023c3ce 363 goto retry_cleanup;
c7848ba1 364 default:
bf49b057 365 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
366 "perl_destruct: ignoring %p (state %u)\n",
367 t, ThrSTATE(t)));
368 MUTEX_UNLOCK(&t->mutex);
c7848ba1 369 /* fall through and out */
33f46ff6
MB
370 }
371 }
8023c3ce
MB
372 /* We leave the above "Pass 1" loop with threads_mutex still locked */
373
374 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 375 while (PL_nthreads > 1)
11343788 376 {
bf49b057 377 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 378 "perl_destruct: final wait for %d threads\n",
533c011a
NIS
379 PL_nthreads - 1));
380 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB
381 }
382 /* At this point, we're the last thread */
533c011a 383 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 384 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS
385 MUTEX_DESTROY(&PL_threads_mutex);
386 COND_DESTROY(&PL_nthreads_cond);
b57a092c 387 PL_nthreads--;
0f15f207 388#endif /* !defined(FAKE_THREADS) */
4d1ff10f 389#endif /* USE_5005THREADS */
11343788 390
3280af22 391 destruct_level = PL_perl_destruct_level;
4633a7c4
LW
392#ifdef DEBUGGING
393 {
394 char *s;
155aba94 395 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc
PP
396 int i = atoi(s);
397 if (destruct_level < i)
398 destruct_level = i;
399 }
4633a7c4
LW
400 }
401#endif
402
31d77e54
AB
403
404 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB
405 dJMPENV;
406 int x = 0;
407
408 JMPENV_PUSH(x);
409 if (PL_endav && !PL_minus_c)
410 call_list(PL_scopestack_ix, PL_endav);
411 JMPENV_POP;
26f423df 412 }
f3faeb53 413 LEAVE;
a0d0e21e
LW
414 FREETMPS;
415
ff0cee69
PP
416 /* We must account for everything. */
417
418 /* Destroy the main CV and syntax tree */
3280af22
NIS
419 if (PL_main_root) {
420 PL_curpad = AvARRAY(PL_comppad);
421 op_free(PL_main_root);
422 PL_main_root = Nullop;
a0d0e21e 423 }
3280af22
NIS
424 PL_curcop = &PL_compiling;
425 PL_main_start = Nullop;
426 SvREFCNT_dec(PL_main_cv);
427 PL_main_cv = Nullcv;
24d3c518 428 PL_dirty = TRUE;
ff0cee69 429
13621cfb
NIS
430 /* Tell PerlIO we are about to tear things apart in case
431 we have layers which are using resources that should
432 be cleaned up now.
433 */
434
435 PerlIO_destruct(aTHX);
436
3280af22 437 if (PL_sv_objcount) {
a0d0e21e
LW
438 /*
439 * Try to destruct global references. We do this first so that the
440 * destructors and destructees still exist. Some sv's might remain.
441 * Non-referenced objects are on their own.
442 */
a0d0e21e 443 sv_clean_objs();
8990e307
LW
444 }
445
5cd24f17 446 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
447 SvREFCNT_dec(PL_warnhook);
448 PL_warnhook = Nullsv;
449 SvREFCNT_dec(PL_diehook);
450 PL_diehook = Nullsv;
5cd24f17 451
4b556e6c 452 /* call exit list functions */
3280af22 453 while (PL_exitlistlen-- > 0)
acfe0abc 454 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 455
3280af22 456 Safefree(PL_exitlist);
4b556e6c 457
a0d0e21e 458 if (destruct_level == 0){
8990e307 459
a0d0e21e 460 DEBUG_P(debprofdump());
ac27b0f5 461
56a2bab7
NIS
462#if defined(PERLIO_LAYERS)
463 /* No more IO - including error messages ! */
464 PerlIO_cleanup(aTHX);
465#endif
466
a0d0e21e 467 /* The exit() function will do everything that needs doing. */
31d77e54 468 return STATUS_NATIVE_EXPORT;;
a0d0e21e 469 }
5dd60ef7 470
551a8b83 471 /* jettison our possibly duplicated environment */
4b647fb0
DM
472 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
473 * so we certainly shouldn't free it here
474 */
475#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
551a8b83
JH
476 if (environ != PL_origenviron) {
477 I32 i;
478
479 for (i = 0; environ[i]; i++)
4b420006 480 safesysfree(environ[i]);
0631ea03 481
4b420006
JH
482 /* Must use safesysfree() when working with environ. */
483 safesysfree(environ);
551a8b83
JH
484
485 environ = PL_origenviron;
486 }
487#endif
488
5f8cb046
DM
489#ifdef USE_ITHREADS
490 /* the syntax tree is shared between clones
491 * so op_free(PL_main_root) only ReREFCNT_dec's
492 * REGEXPs in the parent interpreter
493 * we need to manually ReREFCNT_dec for the clones
494 */
495 {
496 I32 i = AvFILLp(PL_regex_padav) + 1;
497 SV **ary = AvARRAY(PL_regex_padav);
498
499 while (i) {
35061a7e 500 SV *resv = ary[--i];
ba89bb6e 501 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM
502
503 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 504 /* this is PL_reg_curpm, already freed
35061a7e
DM
505 * flag is set in regexec.c:S_regtry
506 */
507 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 508 }
1cc8b4c5
AB
509 else if(SvREPADTMP(resv)) {
510 SvREPADTMP_off(resv);
511 }
35061a7e 512 else {
5f8cb046
DM
513 ReREFCNT_dec(re);
514 }
515 }
516 }
517 SvREFCNT_dec(PL_regex_padav);
518 PL_regex_padav = Nullav;
519 PL_regex_pad = NULL;
520#endif
521
5f05dabc
PP
522 /* loosen bonds of global variables */
523
3280af22
NIS
524 if(PL_rsfp) {
525 (void)PerlIO_close(PL_rsfp);
526 PL_rsfp = Nullfp;
8ebc5c01
PP
527 }
528
529 /* Filters for program text */
3280af22
NIS
530 SvREFCNT_dec(PL_rsfp_filters);
531 PL_rsfp_filters = Nullav;
8ebc5c01
PP
532
533 /* switches */
3280af22
NIS
534 PL_preprocess = FALSE;
535 PL_minus_n = FALSE;
536 PL_minus_p = FALSE;
537 PL_minus_l = FALSE;
538 PL_minus_a = FALSE;
539 PL_minus_F = FALSE;
540 PL_doswitches = FALSE;
599cee73 541 PL_dowarn = G_WARN_OFF;
3280af22
NIS
542 PL_doextract = FALSE;
543 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
544 PL_unsafe = FALSE;
545
546 Safefree(PL_inplace);
547 PL_inplace = Nullch;
a7cb1f99 548 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
549
550 if (PL_e_script) {
551 SvREFCNT_dec(PL_e_script);
552 PL_e_script = Nullsv;
8ebc5c01
PP
553 }
554
bc0a45ed
DM
555 while (--PL_origargc >= 0) {
556 Safefree(PL_origargv[PL_origargc]);
557 }
558 Safefree(PL_origargv);
559
8ebc5c01
PP
560 /* magical thingies */
561
7889fe52
NIS
562 SvREFCNT_dec(PL_ofs_sv); /* $, */
563 PL_ofs_sv = Nullsv;
5f05dabc 564
7889fe52
NIS
565 SvREFCNT_dec(PL_ors_sv); /* $\ */
566 PL_ors_sv = Nullsv;
8ebc5c01 567
3280af22
NIS
568 SvREFCNT_dec(PL_rs); /* $/ */
569 PL_rs = Nullsv;
dc92893f 570
d33b2eba
GS
571 PL_multiline = 0; /* $* */
572 Safefree(PL_osname); /* $^O */
573 PL_osname = Nullch;
5f05dabc 574
3280af22
NIS
575 SvREFCNT_dec(PL_statname);
576 PL_statname = Nullsv;
577 PL_statgv = Nullgv;
5f05dabc 578
8ebc5c01
PP
579 /* defgv, aka *_ should be taken care of elsewhere */
580
8ebc5c01 581 /* clean up after study() */
3280af22
NIS
582 SvREFCNT_dec(PL_lastscream);
583 PL_lastscream = Nullsv;
584 Safefree(PL_screamfirst);
585 PL_screamfirst = 0;
586 Safefree(PL_screamnext);
587 PL_screamnext = 0;
8ebc5c01 588
7d5ea4e7
GS
589 /* float buffer */
590 Safefree(PL_efloatbuf);
591 PL_efloatbuf = Nullch;
592 PL_efloatsize = 0;
593
8ebc5c01 594 /* startup and shutdown function lists */
3280af22 595 SvREFCNT_dec(PL_beginav);
5a837c8f 596 SvREFCNT_dec(PL_beginav_save);
3280af22 597 SvREFCNT_dec(PL_endav);
7d30b5c4 598 SvREFCNT_dec(PL_checkav);
3280af22
NIS
599 SvREFCNT_dec(PL_initav);
600 PL_beginav = Nullav;
5a837c8f 601 PL_beginav_save = Nullav;
3280af22 602 PL_endav = Nullav;
7d30b5c4 603 PL_checkav = Nullav;
3280af22 604 PL_initav = Nullav;
5618dfe8 605
8ebc5c01 606 /* shortcuts just get cleared */
3280af22 607 PL_envgv = Nullgv;
3280af22
NIS
608 PL_incgv = Nullgv;
609 PL_hintgv = Nullgv;
610 PL_errgv = Nullgv;
611 PL_argvgv = Nullgv;
612 PL_argvoutgv = Nullgv;
613 PL_stdingv = Nullgv;
bf49b057 614 PL_stderrgv = Nullgv;
3280af22
NIS
615 PL_last_in_gv = Nullgv;
616 PL_replgv = Nullgv;
5c831c24 617 PL_debstash = Nullhv;
8ebc5c01
PP
618
619 /* reset so print() ends up where we expect */
620 setdefout(Nullgv);
5c831c24 621
7a1c5554
GS
622 SvREFCNT_dec(PL_argvout_stack);
623 PL_argvout_stack = Nullav;
8ebc5c01 624
5c831c24
GS
625 SvREFCNT_dec(PL_modglobal);
626 PL_modglobal = Nullhv;
627 SvREFCNT_dec(PL_preambleav);
628 PL_preambleav = Nullav;
629 SvREFCNT_dec(PL_subname);
630 PL_subname = Nullsv;
631 SvREFCNT_dec(PL_linestr);
632 PL_linestr = Nullsv;
633 SvREFCNT_dec(PL_pidstatus);
634 PL_pidstatus = Nullhv;
635 SvREFCNT_dec(PL_toptarget);
636 PL_toptarget = Nullsv;
637 SvREFCNT_dec(PL_bodytarget);
638 PL_bodytarget = Nullsv;
639 PL_formtarget = Nullsv;
640
d33b2eba 641 /* free locale stuff */
b9582b6a 642#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
643 Safefree(PL_collation_name);
644 PL_collation_name = Nullch;
b9582b6a 645#endif
d33b2eba 646
b9582b6a 647#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
648 Safefree(PL_numeric_name);
649 PL_numeric_name = Nullch;
a453c169 650 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 651#endif
d33b2eba 652
5c831c24
GS
653 /* clear utf8 character classes */
654 SvREFCNT_dec(PL_utf8_alnum);
655 SvREFCNT_dec(PL_utf8_alnumc);
656 SvREFCNT_dec(PL_utf8_ascii);
657 SvREFCNT_dec(PL_utf8_alpha);
658 SvREFCNT_dec(PL_utf8_space);
659 SvREFCNT_dec(PL_utf8_cntrl);
660 SvREFCNT_dec(PL_utf8_graph);
661 SvREFCNT_dec(PL_utf8_digit);
662 SvREFCNT_dec(PL_utf8_upper);
663 SvREFCNT_dec(PL_utf8_lower);
664 SvREFCNT_dec(PL_utf8_print);
665 SvREFCNT_dec(PL_utf8_punct);
666 SvREFCNT_dec(PL_utf8_xdigit);
667 SvREFCNT_dec(PL_utf8_mark);
668 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 669 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 670 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 671 SvREFCNT_dec(PL_utf8_tofold);
5c831c24
GS
672 PL_utf8_alnum = Nullsv;
673 PL_utf8_alnumc = Nullsv;
674 PL_utf8_ascii = Nullsv;
675 PL_utf8_alpha = Nullsv;
676 PL_utf8_space = Nullsv;
677 PL_utf8_cntrl = Nullsv;
678 PL_utf8_graph = Nullsv;
679 PL_utf8_digit = Nullsv;
680 PL_utf8_upper = Nullsv;
681 PL_utf8_lower = Nullsv;
682 PL_utf8_print = Nullsv;
683 PL_utf8_punct = Nullsv;
684 PL_utf8_xdigit = Nullsv;
685 PL_utf8_mark = Nullsv;
686 PL_utf8_toupper = Nullsv;
687 PL_utf8_totitle = Nullsv;
688 PL_utf8_tolower = Nullsv;
b4e400f9 689 PL_utf8_tofold = Nullsv;
5c831c24 690
971a9dd3
GS
691 if (!specialWARN(PL_compiling.cop_warnings))
692 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 693 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
694 if (!specialCopIO(PL_compiling.cop_io))
695 SvREFCNT_dec(PL_compiling.cop_io);
696 PL_compiling.cop_io = Nullsv;
f4dd75d9
GS
697#ifdef USE_ITHREADS
698 Safefree(CopFILE(&PL_compiling));
699 CopFILE(&PL_compiling) = Nullch;
700 Safefree(CopSTASHPV(&PL_compiling));
701#else
01724ea0 702 SvREFCNT_dec(CopFILEGV(&PL_compiling));
f4dd75d9
GS
703 CopFILEGV(&PL_compiling) = Nullgv;
704 /* cop_stash is not refcounted */
01724ea0 705#endif
5c831c24 706
a0d0e21e 707 /* Prepare to destruct main symbol table. */
5f05dabc 708
3280af22
NIS
709 hv = PL_defstash;
710 PL_defstash = 0;
a0d0e21e 711 SvREFCNT_dec(hv);
5c831c24
GS
712 SvREFCNT_dec(PL_curstname);
713 PL_curstname = Nullsv;
a0d0e21e 714
5a844595
GS
715 /* clear queued errors */
716 SvREFCNT_dec(PL_errors);
717 PL_errors = Nullsv;
718
a0d0e21e 719 FREETMPS;
0453d815 720 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 721 if (PL_scopestack_ix != 0)
0453d815
PM
722 Perl_warner(aTHX_ WARN_INTERNAL,
723 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
724 (long)PL_scopestack_ix);
725 if (PL_savestack_ix != 0)
0453d815
PM
726 Perl_warner(aTHX_ WARN_INTERNAL,
727 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
728 (long)PL_savestack_ix);
729 if (PL_tmps_floor != -1)
0453d815 730 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 731 (long)PL_tmps_floor + 1);
a0d0e21e 732 if (cxstack_ix != -1)
0453d815 733 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 734 (long)cxstack_ix + 1);
a0d0e21e 735 }
8990e307
LW
736
737 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 738 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 739 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
740
741 /* the 2 is for PL_fdpid and PL_strtab */
742 while (PL_sv_count > 2 && sv_clean_all())
743 ;
744
d33b2eba
GS
745 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
746 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
747 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
748 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 749
d4777f27
GS
750 AvREAL_off(PL_fdpid); /* no surviving entries */
751 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
752 PL_fdpid = Nullav;
753
6c644e78
GS
754#ifdef HAVE_INTERP_INTERN
755 sys_intern_clear();
756#endif
757
6e72f9df
PP
758 /* Destruct the global string table. */
759 {
760 /* Yell and reset the HeVAL() slots that are still holding refcounts,
761 * so that sv_free() won't fail on them.
762 */
763 I32 riter;
764 I32 max;
765 HE *hent;
766 HE **array;
767
768 riter = 0;
3280af22
NIS
769 max = HvMAX(PL_strtab);
770 array = HvARRAY(PL_strtab);
6e72f9df
PP
771 hent = array[0];
772 for (;;) {
0453d815
PM
773 if (hent && ckWARN_d(WARN_INTERNAL)) {
774 Perl_warner(aTHX_ WARN_INTERNAL,
775 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
776 HeVAL(hent) - Nullsv, HeKEY(hent));
777 HeVAL(hent) = Nullsv;
778 hent = HeNEXT(hent);
779 }
780 if (!hent) {
781 if (++riter > max)
782 break;
783 hent = array[riter];
784 }
785 }
786 }
3280af22 787 SvREFCNT_dec(PL_strtab);
6e72f9df 788
e652bb2f 789#ifdef USE_ITHREADS
a0739874
DM
790 /* free the pointer table used for cloning */
791 ptr_table_free(PL_ptr_table);
53186e96 792#endif
a0739874 793
d33b2eba
GS
794 /* free special SVs */
795
796 SvREFCNT(&PL_sv_yes) = 0;
797 sv_clear(&PL_sv_yes);
798 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 799 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
800
801 SvREFCNT(&PL_sv_no) = 0;
802 sv_clear(&PL_sv_no);
803 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 804 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS
805
806 SvREFCNT(&PL_sv_undef) = 0;
807 SvREADONLY_off(&PL_sv_undef);
d33b2eba 808
0453d815
PM
809 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
810 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 811
56a2bab7 812#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
813 /* No more IO - including error messages ! */
814 PerlIO_cleanup(aTHX);
815#endif
816
3280af22 817 Safefree(PL_origfilename);
3280af22 818 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ
819 if (PL_reg_curpm)
820 Safefree(PL_reg_curpm);
82ba1be6 821 Safefree(PL_reg_poscache);
3280af22
NIS
822 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
823 Safefree(PL_op_mask);
cf36064f
GS
824 Safefree(PL_psig_ptr);
825 Safefree(PL_psig_name);
2c2666fc 826 Safefree(PL_bitcount);
ce08f86c 827 Safefree(PL_psig_pend);
6e72f9df 828 nuke_stacks();
3280af22 829 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 830
a0d0e21e 831 DEBUG_P(debprofdump());
4d1ff10f 832#ifdef USE_5005THREADS
5f08fbcd 833 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS
834 MUTEX_DESTROY(&PL_sv_mutex);
835 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 836 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 837 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 838 COND_DESTROY(&PL_eval_cond);
11d617a5
GS
839#ifdef EMULATE_ATOMIC_REFCOUNTS
840 MUTEX_DESTROY(&PL_svref_mutex);
841#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 842
8023c3ce 843 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS
844 Safefree(SvPVX(PL_thrsv));
845 Safefree(SvANY(PL_thrsv));
846 Safefree(PL_thrsv);
847 PL_thrsv = Nullsv;
4d1ff10f 848#endif /* USE_5005THREADS */
d33b2eba 849
e5dd39fc
AB
850#ifdef USE_REENTRANT_API
851 Safefree(PL_reentrant_buffer->tmbuff);
852 Safefree(PL_reentrant_buffer);
853#endif
854
612f20c3
GS
855 sv_free_arenas();
856
fc36a67e
PP
857 /* As the absolutely last thing, free the non-arena SV for mess() */
858
3280af22 859 if (PL_mess_sv) {
9c63abab
GS
860 /* it could have accumulated taint magic */
861 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
862 MAGIC* mg;
863 MAGIC* moremagic;
864 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
865 moremagic = mg->mg_moremagic;
14befaf4
DM
866 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
867 && mg->mg_len >= 0)
9c63abab
GS
868 Safefree(mg->mg_ptr);
869 Safefree(mg);
870 }
871 }
fc36a67e 872 /* we know that type >= SVt_PV */
155aba94 873 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS
874 Safefree(SvPVX(PL_mess_sv));
875 Safefree(SvANY(PL_mess_sv));
876 Safefree(PL_mess_sv);
877 PL_mess_sv = Nullsv;
fc36a67e 878 }
31d77e54 879 return STATUS_NATIVE_EXPORT;
79072805
LW
880}
881
954c1994
GS
882/*
883=for apidoc perl_free
884
885Releases a Perl interpreter. See L<perlembed>.
886
887=cut
888*/
889
79072805 890void
0cb96387 891perl_free(pTHXx)
79072805 892{
acfe0abc 893#if defined(WIN32) || defined(NETWARE)
ce3e5b80 894# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
895# ifdef NETWARE
896 void *host = nw_internal_host;
897# else
898 void *host = w32_internal_host;
899# endif
ce3e5b80 900 PerlMem_free(aTHXx);
acfe0abc
GS
901# ifdef NETWARE
902 nw5_delete_internal_host(host);
903# else
904 win32_delete_internal_host(host);
905# endif
1c0ca838
GS
906# else
907 PerlMem_free(aTHXx);
908# endif
acfe0abc
GS
909#else
910 PerlMem_free(aTHXx);
76e3520e 911#endif
79072805
LW
912}
913
4b556e6c 914void
864dbfa3 915Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 916{
3280af22
NIS
917 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
918 PL_exitlist[PL_exitlistlen].fn = fn;
919 PL_exitlist[PL_exitlistlen].ptr = ptr;
920 ++PL_exitlistlen;
4b556e6c
JD
921}
922
954c1994
GS
923/*
924=for apidoc perl_parse
925
926Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
927
928=cut
929*/
930
79072805 931int
0cb96387 932perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 933{
6224f72b 934 I32 oldscope;
6224f72b 935 int ret;
db36c5a1 936 dJMPENV;
4d1ff10f 937#ifdef USE_5005THREADS
cea2e8a9
GS
938 dTHX;
939#endif
8d063cd8 940
a687059c
LW
941#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
942#ifdef IAMSUID
943#undef IAMSUID
cea2e8a9 944 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW
945setuid perl scripts securely.\n");
946#endif
947#endif
948
3280af22 949 PL_origargc = argc;
bc0a45ed
DM
950 {
951 /* we copy rather than point to argv
952 * since perl_clone will copy and perl_destruct
3a1ee7e8 953 * has no way of knowing if we've made a copy or
bc0a45ed
DM
954 * just point to argv
955 */
956 int i = PL_origargc;
957 New(0, PL_origargv, i+1, char*);
958 PL_origargv[i] = '\0';
959 while (i-- > 0) {
960 PL_origargv[i] = savepv(argv[i]);
961 }
962 }
963
0631ea03 964
a0d0e21e 965
3280af22 966 if (PL_do_undump) {
a0d0e21e
LW
967
968 /* Come here if running an undumped a.out. */
969
3280af22
NIS
970 PL_origfilename = savepv(argv[0]);
971 PL_do_undump = FALSE;
a0d0e21e 972 cxstack_ix = -1; /* start label stack again */
748a9306 973 init_ids();
a0d0e21e
LW
974 init_postdump_symbols(argc,argv,env);
975 return 0;
976 }
977
3280af22
NIS
978 if (PL_main_root) {
979 PL_curpad = AvARRAY(PL_comppad);
980 op_free(PL_main_root);
981 PL_main_root = Nullop;
ff0cee69 982 }
3280af22
NIS
983 PL_main_start = Nullop;
984 SvREFCNT_dec(PL_main_cv);
985 PL_main_cv = Nullcv;
79072805 986
3280af22
NIS
987 time(&PL_basetime);
988 oldscope = PL_scopestack_ix;
599cee73 989 PL_dowarn = G_WARN_OFF;
f86702cc 990
14dd3ad8
GS
991#ifdef PERL_FLEXIBLE_EXCEPTIONS
992 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
993#else
994 JMPENV_PUSH(ret);
995#endif
6224f72b 996 switch (ret) {
312caa8e 997 case 0:
14dd3ad8
GS
998#ifndef PERL_FLEXIBLE_EXCEPTIONS
999 parse_body(env,xsinit);
1000#endif
7d30b5c4
GS
1001 if (PL_checkav)
1002 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1003 ret = 0;
1004 break;
6224f72b
GS
1005 case 1:
1006 STATUS_ALL_FAILURE;
1007 /* FALL THROUGH */
1008 case 2:
1009 /* my_exit() was called */
3280af22 1010 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1011 LEAVE;
1012 FREETMPS;
3280af22 1013 PL_curstash = PL_defstash;
7d30b5c4
GS
1014 if (PL_checkav)
1015 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1016 ret = STATUS_NATIVE_EXPORT;
1017 break;
6224f72b 1018 case 3:
bf49b057 1019 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1020 ret = 1;
1021 break;
6224f72b 1022 }
14dd3ad8
GS
1023 JMPENV_POP;
1024 return ret;
1025}
1026
1027#ifdef PERL_FLEXIBLE_EXCEPTIONS
1028STATIC void *
1029S_vparse_body(pTHX_ va_list args)
1030{
1031 char **env = va_arg(args, char**);
1032 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1033
1034 return parse_body(env, xsinit);
312caa8e 1035}
14dd3ad8 1036#endif
312caa8e
CS
1037
1038STATIC void *
14dd3ad8 1039S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1040{
312caa8e
CS
1041 int argc = PL_origargc;
1042 char **argv = PL_origargv;
312caa8e
CS
1043 char *scriptname = NULL;
1044 int fdscript = -1;
1045 VOL bool dosearch = FALSE;
1046 char *validarg = "";
1047 AV* comppadlist;
1048 register SV *sv;
1049 register char *s;
cf756827 1050 char *cddir = Nullch;
312caa8e 1051
3280af22 1052 sv_setpvn(PL_linestr,"",0);
79cb57f6 1053 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1054 SAVEFREESV(sv);
1055 init_main_stash();
54310121 1056
6224f72b
GS
1057 for (argc--,argv++; argc > 0; argc--,argv++) {
1058 if (argv[0][0] != '-' || !argv[0][1])
1059 break;
1060#ifdef DOSUID
1061 if (*validarg)
1062 validarg = " PHOOEY ";
1063 else
1064 validarg = argv[0];
13281fa4 1065#endif
6224f72b
GS
1066 s = argv[0]+1;
1067 reswitch:
1068 switch (*s) {
729a02f2
GS
1069 case 'C':
1070#ifdef WIN32
c0932edc 1071 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS
1072 /* FALL THROUGH */
1073#endif
1d5472a9
GS
1074#ifndef PERL_STRICT_CR
1075 case '\r':
1076#endif
6224f72b
GS
1077 case ' ':
1078 case '0':
1079 case 'F':
1080 case 'a':
1081 case 'c':
1082 case 'd':
1083 case 'D':
1084 case 'h':
1085 case 'i':
1086 case 'l':
1087 case 'M':
1088 case 'm':
1089 case 'n':
1090 case 'p':
1091 case 's':
1092 case 'u':
1093 case 'U':
1094 case 'v':
599cee73
PM
1095 case 'W':
1096 case 'X':
6224f72b 1097 case 'w':
155aba94 1098 if ((s = moreswitches(s)))
6224f72b
GS
1099 goto reswitch;
1100 break;
33b78306 1101
6537fe72
MS
1102 case 't':
1103 PL_taint_warn = TRUE;
6224f72b 1104 case 'T':
3280af22 1105 PL_tainting = TRUE;
6224f72b
GS
1106 s++;
1107 goto reswitch;
f86702cc 1108
6224f72b 1109 case 'e':
bf4acbe4
GS
1110#ifdef MACOS_TRADITIONAL
1111 /* ignore -e for Dev:Pseudo argument */
1112 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1113 break;
bf4acbe4 1114#endif
3280af22 1115 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1116 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1117 if (!PL_e_script) {
79cb57f6 1118 PL_e_script = newSVpvn("",0);
0cb96387 1119 filter_add(read_e_script, NULL);
6224f72b
GS
1120 }
1121 if (*++s)
3280af22 1122 sv_catpv(PL_e_script, s);
6224f72b 1123 else if (argv[1]) {
3280af22 1124 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1125 argc--,argv++;
1126 }
1127 else
cea2e8a9 1128 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1129 sv_catpv(PL_e_script, "\n");
6224f72b 1130 break;
afe37c7d 1131
6224f72b
GS
1132 case 'I': /* -I handled both here and in moreswitches() */
1133 forbid_setid("-I");
1134 if (!*++s && (s=argv[1]) != Nullch) {
1135 argc--,argv++;
1136 }
6224f72b 1137 if (s && *s) {
0df16ed7
GS
1138 char *p;
1139 STRLEN len = strlen(s);
1140 p = savepvn(s, len);
9c8a64f0 1141 incpush(p, TRUE, TRUE);
0df16ed7
GS
1142 sv_catpvn(sv, "-I", 2);
1143 sv_catpvn(sv, p, len);
1144 sv_catpvn(sv, " ", 1);
6224f72b 1145 Safefree(p);
0df16ed7
GS
1146 }
1147 else
a67e862a 1148 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1149 break;
1150 case 'P':
1151 forbid_setid("-P");
3280af22 1152 PL_preprocess = TRUE;
6224f72b
GS
1153 s++;
1154 goto reswitch;
1155 case 'S':
1156 forbid_setid("-S");
1157 dosearch = TRUE;
1158 s++;
1159 goto reswitch;
1160 case 'V':
3280af22
NIS
1161 if (!PL_preambleav)
1162 PL_preambleav = newAV();
1163 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1164 if (*++s != ':') {
3280af22 1165 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1166#ifdef VMS
6b88bc9c 1167 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1168#else
3280af22 1169 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1170#endif
3280af22 1171 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1172# ifdef DEBUGGING
3280af22 1173 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1174# endif
6224f72b 1175# ifdef MULTIPLICITY
8f872242 1176 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1177# endif
4d1ff10f
AB
1178# ifdef USE_5005THREADS
1179 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1180# endif
ac5e8965
JH
1181# ifdef USE_ITHREADS
1182 sv_catpv(PL_Sv," USE_ITHREADS");
1183# endif
10cc9d2a
JH
1184# ifdef USE_64_BIT_INT
1185 sv_catpv(PL_Sv," USE_64_BIT_INT");
1186# endif
1187# ifdef USE_64_BIT_ALL
1188 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1189# endif
1190# ifdef USE_LONG_DOUBLE
1191 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1192# endif
53430762
JH
1193# ifdef USE_LARGE_FILES
1194 sv_catpv(PL_Sv," USE_LARGE_FILES");
1195# endif
ac5e8965
JH
1196# ifdef USE_SOCKS
1197 sv_catpv(PL_Sv," USE_SOCKS");
1198# endif
b363f7ed
GS
1199# ifdef PERL_IMPLICIT_CONTEXT
1200 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1201# endif
1202# ifdef PERL_IMPLICIT_SYS
1203 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1204# endif
3280af22 1205 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1206
6224f72b
GS
1207#if defined(LOCAL_PATCH_COUNT)
1208 if (LOCAL_PATCH_COUNT > 0) {
1209 int i;
3280af22 1210 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1211 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1212 if (PL_localpatches[i])
cea2e8a9 1213 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS
1214 }
1215 }
1216#endif
cea2e8a9 1217 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1218#ifdef __DATE__
1219# ifdef __TIME__
cea2e8a9 1220 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1221# else
cea2e8a9 1222 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1223# endif
1224#endif
3280af22 1225 sv_catpv(PL_Sv, "; \
6224f72b 1226$\"=\"\\n \"; \
69fcd688
JH
1227@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1228#ifdef __CYGWIN__
1229 sv_catpv(PL_Sv,"\
1230push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1231#endif
1232 sv_catpv(PL_Sv, "\
6224f72b
GS
1233print \" \\%ENV:\\n @env\\n\" if @env; \
1234print \" \\@INC:\\n @INC\\n\";");
1235 }
1236 else {
3280af22
NIS
1237 PL_Sv = newSVpv("config_vars(qw(",0);
1238 sv_catpv(PL_Sv, ++s);
1239 sv_catpv(PL_Sv, "))");
6224f72b
GS
1240 s += strlen(s);
1241 }
3280af22 1242 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1243 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1244 goto reswitch;
1245 case 'x':
3280af22 1246 PL_doextract = TRUE;
6224f72b
GS
1247 s++;
1248 if (*s)
f4c556ac 1249 cddir = s;
6224f72b
GS
1250 break;
1251 case 0:
1252 break;
1253 case '-':
1254 if (!*++s || isSPACE(*s)) {
1255 argc--,argv++;
1256 goto switch_end;
1257 }
1258 /* catch use of gnu style long options */
1259 if (strEQ(s, "version")) {
1260 s = "v";
1261 goto reswitch;
1262 }
1263 if (strEQ(s, "help")) {
1264 s = "h";
1265 goto reswitch;
1266 }
1267 s--;
1268 /* FALL THROUGH */
1269 default:
cea2e8a9 1270 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1271 }
1272 }
6224f72b 1273 switch_end:
54310121 1274
f675dbe5
CB
1275 if (
1276#ifndef SECURE_INTERNAL_GETENV
1277 !PL_tainting &&
1278#endif
cf756827 1279 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1280 {
cf756827 1281 char *popt = s;
74288ac8
GS
1282 while (isSPACE(*s))
1283 s++;
1284 if (*s == '-' && *(s+1) == 'T')
1285 PL_tainting = TRUE;
1286 else {
cf756827 1287 char *popt_copy = Nullch;
74288ac8 1288 while (s && *s) {
4ea8f8fb 1289 char *d;
74288ac8
GS
1290 while (isSPACE(*s))
1291 s++;
1292 if (*s == '-') {
1293 s++;
1294 if (isSPACE(*s))
1295 continue;
1296 }
4ea8f8fb 1297 d = s;
74288ac8
GS
1298 if (!*s)
1299 break;
1c4db469 1300 if (!strchr("DIMUdmtw", *s))
cea2e8a9 1301 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1302 while (++s && *s) {
1303 if (isSPACE(*s)) {
cf756827
GS
1304 if (!popt_copy) {
1305 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1306 s = popt_copy + (s - popt);
1307 d = popt_copy + (d - popt);
1308 }
4ea8f8fb
MS
1309 *s++ = '\0';
1310 break;
1311 }
1312 }
1c4db469
RGS
1313 if (*d == 't') {
1314 PL_tainting = TRUE;
1315 PL_taint_warn = TRUE;
1316 } else {
1317 moreswitches(d);
1318 }
6224f72b 1319 }
6224f72b
GS
1320 }
1321 }
a0d0e21e 1322
6224f72b
GS
1323 if (!scriptname)
1324 scriptname = argv[0];
3280af22 1325 if (PL_e_script) {
6224f72b
GS
1326 argc++,argv--;
1327 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1328 }
1329 else if (scriptname == Nullch) {
1330#ifdef MSDOS
1331 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1332 moreswitches("h");
1333#endif
1334 scriptname = "-";
1335 }
1336
1337 init_perllib();
1338
1339 open_script(scriptname,dosearch,sv,&fdscript);
1340
1341 validate_suid(validarg, scriptname,fdscript);
1342
64ca3a65 1343#ifndef PERL_MICRO
0b5b802d
GS
1344#if defined(SIGCHLD) || defined(SIGCLD)
1345 {
1346#ifndef SIGCHLD
1347# define SIGCHLD SIGCLD
1348#endif
1349 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1350 if (sigstate == SIG_IGN) {
1351 if (ckWARN(WARN_SIGNAL))
1352 Perl_warner(aTHX_ WARN_SIGNAL,
1353 "Can't ignore signal CHLD, forcing to default");
1354 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1355 }
1356 }
1357#endif
64ca3a65 1358#endif
0b5b802d 1359
bf4acbe4
GS
1360#ifdef MACOS_TRADITIONAL
1361 if (PL_doextract || gMacPerl_AlwaysExtract) {
1362#else
f4c556ac 1363 if (PL_doextract) {
bf4acbe4 1364#endif
6224f72b 1365 find_beginning();
f4c556ac
GS
1366 if (cddir && PerlDir_chdir(cddir) < 0)
1367 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1368
1369 }
6224f72b 1370
3280af22
NIS
1371 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1372 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1373 CvUNIQUE_on(PL_compcv);
1374
1375 PL_comppad = newAV();
1376 av_push(PL_comppad, Nullsv);
1377 PL_curpad = AvARRAY(PL_comppad);
1378 PL_comppad_name = newAV();
1379 PL_comppad_name_fill = 0;
1380 PL_min_intro_pending = 0;
1381 PL_padix = 0;
4d1ff10f 1382#ifdef USE_5005THREADS
79cb57f6 1383 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS
1384 PL_curpad[0] = (SV*)newAV();
1385 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1386 CvOWNER(PL_compcv) = 0;
1387 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1388 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1389#endif /* USE_5005THREADS */
6224f72b
GS
1390
1391 comppadlist = newAV();
1392 AvREAL_off(comppadlist);
3280af22
NIS
1393 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1394 av_store(comppadlist, 1, (SV*)PL_comppad);
1395 CvPADLIST(PL_compcv) = comppadlist;
6224f72b 1396
0c4f7ff0 1397 boot_core_PerlIO();
6224f72b 1398 boot_core_UNIVERSAL();
9a34ef1d 1399#ifndef PERL_MICRO
09bef843 1400 boot_core_xsutils();
9a34ef1d 1401#endif
6224f72b
GS
1402
1403 if (xsinit)
acfe0abc 1404 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1405#ifndef PERL_MICRO
ed79a026 1406#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1407 init_os_extras();
6224f72b 1408#endif
64ca3a65 1409#endif
6224f72b 1410
29209bc5 1411#ifdef USE_SOCKS
1b9c9cf5
DH
1412# ifdef HAS_SOCKS5_INIT
1413 socks5_init(argv[0]);
1414# else
29209bc5 1415 SOCKSinit(argv[0]);
1b9c9cf5 1416# endif
ac27b0f5 1417#endif
29209bc5 1418
6224f72b
GS
1419 init_predump_symbols();
1420 /* init_postdump_symbols not currently designed to be called */
1421 /* more than once (ENV isn't cleared first, for example) */
1422 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1423 if (!PL_do_undump)
6224f72b
GS
1424 init_postdump_symbols(argc,argv,env);
1425
1426 init_lexer();
1427
1428 /* now parse the script */
1429
91487cfc 1430 SETERRNO(0,SS$_NORMAL);
3280af22 1431 PL_error_count = 0;
bf4acbe4
GS
1432#ifdef MACOS_TRADITIONAL
1433 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1434 if (PL_minus_c)
1435 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1436 else {
1437 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1438 MacPerl_MPWFileName(PL_origfilename));
1439 }
1440 }
1441#else
3280af22
NIS
1442 if (yyparse() || PL_error_count) {
1443 if (PL_minus_c)
cea2e8a9 1444 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1445 else {
cea2e8a9 1446 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1447 PL_origfilename);
6224f72b
GS
1448 }
1449 }
bf4acbe4 1450#endif
57843af0 1451 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1452 PL_curstash = PL_defstash;
1453 PL_preprocess = FALSE;
1454 if (PL_e_script) {
1455 SvREFCNT_dec(PL_e_script);
1456 PL_e_script = Nullsv;
6224f72b
GS
1457 }
1458
8bfdd7d9
HS
1459/*
1460 Not sure that this is still the right place to do this now that we
1461 no longer use PL_nrs. HVDS 2001/09/09
1462*/
864dbfa3 1463 sv_setsv(get_sv("/", TRUE), PL_rs);
8bfdd7d9 1464
3280af22 1465 if (PL_do_undump)
6224f72b
GS
1466 my_unexec();
1467
57843af0
GS
1468 if (isWARN_ONCE) {
1469 SAVECOPFILE(PL_curcop);
1470 SAVECOPLINE(PL_curcop);
3280af22 1471 gv_check(PL_defstash);
57843af0 1472 }
6224f72b
GS
1473
1474 LEAVE;
1475 FREETMPS;
1476
1477#ifdef MYMALLOC
1478 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1479 dump_mstats("after compilation:");
1480#endif
1481
1482 ENTER;
3280af22 1483 PL_restartop = 0;
312caa8e 1484 return NULL;
6224f72b
GS
1485}
1486
954c1994
GS
1487/*
1488=for apidoc perl_run
1489
1490Tells a Perl interpreter to run. See L<perlembed>.
1491
1492=cut
1493*/
1494
6224f72b 1495int
0cb96387 1496perl_run(pTHXx)
6224f72b 1497{
6224f72b 1498 I32 oldscope;
14dd3ad8 1499 int ret = 0;
db36c5a1 1500 dJMPENV;
4d1ff10f 1501#ifdef USE_5005THREADS
cea2e8a9
GS
1502 dTHX;
1503#endif
6224f72b 1504
3280af22 1505 oldscope = PL_scopestack_ix;
96e176bf
CL
1506#ifdef VMS
1507 VMSISH_HUSHED = 0;
1508#endif
6224f72b 1509
14dd3ad8 1510#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1511 redo_body:
14dd3ad8
GS
1512 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1513#else
1514 JMPENV_PUSH(ret);
1515#endif
6224f72b
GS
1516 switch (ret) {
1517 case 1:
1518 cxstack_ix = -1; /* start context stack again */
312caa8e 1519 goto redo_body;
14dd3ad8
GS
1520 case 0: /* normal completion */
1521#ifndef PERL_FLEXIBLE_EXCEPTIONS
1522 redo_body:
1523 run_body(oldscope);
1524#endif
1525 /* FALL THROUGH */
1526 case 2: /* my_exit() */
3280af22 1527 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1528 LEAVE;
1529 FREETMPS;
3280af22 1530 PL_curstash = PL_defstash;
3a1ee7e8 1531 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
1532 PL_endav && !PL_minus_c)
1533 call_list(oldscope, PL_endav);
6224f72b
GS
1534#ifdef MYMALLOC
1535 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1536 dump_mstats("after execution: ");
1537#endif
14dd3ad8
GS
1538 ret = STATUS_NATIVE_EXPORT;
1539 break;
6224f72b 1540 case 3:
312caa8e
CS
1541 if (PL_restartop) {
1542 POPSTACK_TO(PL_mainstack);
1543 goto redo_body;
6224f72b 1544 }
bf49b057 1545 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1546 FREETMPS;
14dd3ad8
GS
1547 ret = 1;
1548 break;
6224f72b
GS
1549 }
1550
14dd3ad8
GS
1551 JMPENV_POP;
1552 return ret;
312caa8e
CS
1553}
1554
14dd3ad8 1555#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1556STATIC void *
14dd3ad8 1557S_vrun_body(pTHX_ va_list args)
312caa8e 1558{
312caa8e
CS
1559 I32 oldscope = va_arg(args, I32);
1560
14dd3ad8
GS
1561 return run_body(oldscope);
1562}
1563#endif
1564
1565
1566STATIC void *
1567S_run_body(pTHX_ I32 oldscope)
1568{
6224f72b 1569 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1570 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1571
3280af22 1572 if (!PL_restartop) {
6224f72b
GS
1573 DEBUG_x(dump_all());
1574 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1575 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1576 PTR2UV(thr)));
6224f72b 1577
3280af22 1578 if (PL_minus_c) {
bf4acbe4 1579#ifdef MACOS_TRADITIONAL
be708cc0 1580 PerlIO_printf(Perl_error_log, "# %s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1581#else
bf49b057 1582 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1583#endif
6224f72b
GS
1584 my_exit(0);
1585 }
3280af22 1586 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1587 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1588 if (PL_initav)
1589 call_list(oldscope, PL_initav);
6224f72b
GS
1590 }
1591
1592 /* do it */
1593
3280af22 1594 if (PL_restartop) {
533c011a 1595 PL_op = PL_restartop;
3280af22 1596 PL_restartop = 0;
cea2e8a9 1597 CALLRUNOPS(aTHX);
6224f72b 1598 }
3280af22
NIS
1599 else if (PL_main_start) {
1600 CvDEPTH(PL_main_cv) = 1;
533c011a 1601 PL_op = PL_main_start;
cea2e8a9 1602 CALLRUNOPS(aTHX);
6224f72b
GS
1603 }
1604
f6b3007c
JH
1605 my_exit(0);
1606 /* NOTREACHED */
312caa8e 1607 return NULL;
6224f72b
GS
1608}
1609
954c1994
GS
1610/*
1611=for apidoc p||get_sv
1612
1613Returns the SV of the specified Perl scalar. If C<create> is set and the
1614Perl variable does not exist then it will be created. If C<create> is not
1615set and the variable does not exist then NULL is returned.
1616
1617=cut
1618*/
1619
6224f72b 1620SV*
864dbfa3 1621Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1622{
1623 GV *gv;
4d1ff10f 1624#ifdef USE_5005THREADS
6224f72b
GS
1625 if (name[1] == '\0' && !isALPHA(name[0])) {
1626 PADOFFSET tmp = find_threadsv(name);
411caa50 1627 if (tmp != NOT_IN_PAD)
6224f72b 1628 return THREADSV(tmp);
6224f72b 1629 }
4d1ff10f 1630#endif /* USE_5005THREADS */
6224f72b
GS
1631 gv = gv_fetchpv(name, create, SVt_PV);
1632 if (gv)
1633 return GvSV(gv);
1634 return Nullsv;
1635}
1636
954c1994
GS
1637/*
1638=for apidoc p||get_av
1639
1640Returns the AV of the specified Perl array. If C<create> is set and the
1641Perl variable does not exist then it will be created. If C<create> is not
1642set and the variable does not exist then NULL is returned.
1643
1644=cut
1645*/
1646
6224f72b 1647AV*
864dbfa3 1648Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1649{
1650 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1651 if (create)
1652 return GvAVn(gv);
1653 if (gv)
1654 return GvAV(gv);
1655 return Nullav;
1656}
1657
954c1994
GS
1658/*
1659=for apidoc p||get_hv
1660
1661Returns the HV of the specified Perl hash. If C<create> is set and the
1662Perl variable does not exist then it will be created. If C<create> is not
1663set and the variable does not exist then NULL is returned.
1664
1665=cut
1666*/
1667
6224f72b 1668HV*
864dbfa3 1669Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1670{
a0d0e21e
LW
1671 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1672 if (create)
1673 return GvHVn(gv);
1674 if (gv)
1675 return GvHV(gv);
1676 return Nullhv;
1677}
1678
954c1994
GS
1679/*
1680=for apidoc p||get_cv
1681
1682Returns the CV of the specified Perl subroutine. If C<create> is set and
1683the Perl subroutine does not exist then it will be declared (which has the
1684same effect as saying C<sub name;>). If C<create> is not set and the
1685subroutine does not exist then NULL is returned.
1686
1687=cut
1688*/
1689
a0d0e21e 1690CV*
864dbfa3 1691Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
1692{
1693 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1694 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
1695 /* XXX this is probably not what they think they're getting.
1696 * It has the same effect as "sub name;", i.e. just a forward
1697 * declaration! */
8ebc5c01 1698 if (create && !GvCVu(gv))
774d564b 1699 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1700 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1701 Nullop,
a0d0e21e
LW
1702 Nullop);
1703 if (gv)
8ebc5c01 1704 return GvCVu(gv);
a0d0e21e
LW
1705 return Nullcv;
1706}
1707
79072805
LW
1708/* Be sure to refetch the stack pointer after calling these routines. */
1709
954c1994
GS
1710/*
1711=for apidoc p||call_argv
1712
1713Performs a callback to the specified Perl sub. See L<perlcall>.
1714
1715=cut
1716*/
1717
a0d0e21e 1718I32
864dbfa3 1719Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1720
8ac85365
NIS
1721 /* See G_* flags in cop.h */
1722 /* null terminated arg list */
8990e307 1723{
a0d0e21e 1724 dSP;
8990e307 1725
924508f0 1726 PUSHMARK(SP);
a0d0e21e 1727 if (argv) {
8990e307 1728 while (*argv) {
a0d0e21e 1729 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
1730 argv++;
1731 }
a0d0e21e 1732 PUTBACK;
8990e307 1733 }
864dbfa3 1734 return call_pv(sub_name, flags);
8990e307
LW
1735}
1736
954c1994
GS
1737/*
1738=for apidoc p||call_pv
1739
1740Performs a callback to the specified Perl sub. See L<perlcall>.
1741
1742=cut
1743*/
1744
a0d0e21e 1745I32
864dbfa3 1746Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
1747 /* name of the subroutine */
1748 /* See G_* flags in cop.h */
a0d0e21e 1749{
864dbfa3 1750 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
1751}
1752
954c1994
GS
1753/*
1754=for apidoc p||call_method
1755
1756Performs a callback to the specified Perl method. The blessed object must
1757be on the stack. See L<perlcall>.
1758
1759=cut
1760*/
1761
a0d0e21e 1762I32
864dbfa3 1763Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
1764 /* name of the subroutine */
1765 /* See G_* flags in cop.h */
a0d0e21e 1766{
968b3946 1767 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
1768}
1769
1770/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
1771/*
1772=for apidoc p||call_sv
1773
1774Performs a callback to the Perl sub whose name is in the SV. See
1775L<perlcall>.
1776
1777=cut
1778*/
1779
a0d0e21e 1780I32
864dbfa3 1781Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1782 /* See G_* flags in cop.h */
a0d0e21e 1783{
924508f0 1784 dSP;
a0d0e21e 1785 LOGOP myop; /* fake syntax tree node */
968b3946 1786 UNOP method_op;
aa689395 1787 I32 oldmark;
13689cfe 1788 volatile I32 retval = 0;
a0d0e21e 1789 I32 oldscope;
54310121 1790 bool oldcatch = CATCH_GET;
6224f72b 1791 int ret;
533c011a 1792 OP* oldop = PL_op;
db36c5a1 1793 dJMPENV;
1e422769 1794
a0d0e21e
LW
1795 if (flags & G_DISCARD) {
1796 ENTER;
1797 SAVETMPS;
1798 }
1799
aa689395 1800 Zero(&myop, 1, LOGOP);
54310121 1801 myop.op_next = Nullop;
f51d4af5 1802 if (!(flags & G_NOARGS))
aa689395 1803 myop.op_flags |= OPf_STACKED;
54310121
PP
1804 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1805 (flags & G_ARRAY) ? OPf_WANT_LIST :
1806 OPf_WANT_SCALAR);
462e5cf6 1807 SAVEOP();
533c011a 1808 PL_op = (OP*)&myop;
aa689395 1809
3280af22
NIS
1810 EXTEND(PL_stack_sp, 1);
1811 *++PL_stack_sp = sv;
aa689395 1812 oldmark = TOPMARK;
3280af22 1813 oldscope = PL_scopestack_ix;
a0d0e21e 1814
3280af22 1815 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1816 /* Handle first BEGIN of -d. */
3280af22 1817 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
1818 /* Try harder, since this may have been a sighandler, thus
1819 * curstash may be meaningless. */
3280af22 1820 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1821 && !(flags & G_NODEBUG))
533c011a 1822 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1823
968b3946
GS
1824 if (flags & G_METHOD) {
1825 Zero(&method_op, 1, UNOP);
1826 method_op.op_next = PL_op;
1827 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1828 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1829 PL_op = (OP*)&method_op;
968b3946
GS
1830 }
1831
312caa8e 1832 if (!(flags & G_EVAL)) {
0cdb2077 1833 CATCH_SET(TRUE);
14dd3ad8 1834 call_body((OP*)&myop, FALSE);
312caa8e 1835 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1836 CATCH_SET(oldcatch);
312caa8e
CS
1837 }
1838 else {
d78bda3d 1839 myop.op_other = (OP*)&myop;
3280af22 1840 PL_markstack_ptr--;
4633a7c4
LW
1841 /* we're trying to emulate pp_entertry() here */
1842 {
c09156bb 1843 register PERL_CONTEXT *cx;
54310121 1844 I32 gimme = GIMME_V;
ac27b0f5 1845
4633a7c4
LW
1846 ENTER;
1847 SAVETMPS;
ac27b0f5 1848
968b3946 1849 push_return(Nullop);
1d76a5c3 1850 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1851 PUSHEVAL(cx, 0, 0);
533c011a 1852 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1853
faef0170 1854 PL_in_eval = EVAL_INEVAL;
4633a7c4 1855 if (flags & G_KEEPERR)
faef0170 1856 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1857 else
38a03e6e 1858 sv_setpv(ERRSV,"");
4633a7c4 1859 }
3280af22 1860 PL_markstack_ptr++;
a0d0e21e 1861
14dd3ad8
GS
1862#ifdef PERL_FLEXIBLE_EXCEPTIONS
1863 redo_body:
1864 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1865 (OP*)&myop, FALSE);
14dd3ad8
GS
1866#else
1867 JMPENV_PUSH(ret);
1868#endif
6224f72b
GS
1869 switch (ret) {
1870 case 0:
14dd3ad8
GS
1871#ifndef PERL_FLEXIBLE_EXCEPTIONS
1872 redo_body:
1873 call_body((OP*)&myop, FALSE);
1874#endif
312caa8e
CS
1875 retval = PL_stack_sp - (PL_stack_base + oldmark);
1876 if (!(flags & G_KEEPERR))
1877 sv_setpv(ERRSV,"");
a0d0e21e 1878 break;
6224f72b 1879 case 1:
f86702cc 1880 STATUS_ALL_FAILURE;
a0d0e21e 1881 /* FALL THROUGH */
6224f72b 1882 case 2:
a0d0e21e 1883 /* my_exit() was called */
3280af22 1884 PL_curstash = PL_defstash;
a0d0e21e 1885 FREETMPS;
14dd3ad8 1886 JMPENV_POP;
cc3604b1 1887 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1888 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1889 my_exit_jump();
a0d0e21e 1890 /* NOTREACHED */
6224f72b 1891 case 3:
3280af22 1892 if (PL_restartop) {
533c011a 1893 PL_op = PL_restartop;
3280af22 1894 PL_restartop = 0;
312caa8e 1895 goto redo_body;
a0d0e21e 1896 }
3280af22 1897 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1898 if (flags & G_ARRAY)
1899 retval = 0;
1900 else {
1901 retval = 1;
3280af22 1902 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1903 }
312caa8e 1904 break;
a0d0e21e 1905 }
a0d0e21e 1906
3280af22 1907 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
1908 SV **newsp;
1909 PMOP *newpm;
1910 I32 gimme;
c09156bb 1911 register PERL_CONTEXT *cx;
a0a2876f
LW
1912 I32 optype;
1913
1914 POPBLOCK(cx,newpm);
1915 POPEVAL(cx);
1916 pop_return();
3280af22 1917 PL_curpm = newpm;
a0a2876f 1918 LEAVE;
a0d0e21e 1919 }
14dd3ad8 1920 JMPENV_POP;
a0d0e21e 1921 }
1e422769 1922
a0d0e21e 1923 if (flags & G_DISCARD) {
3280af22 1924 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1925 retval = 0;
1926 FREETMPS;
1927 LEAVE;
1928 }
533c011a 1929 PL_op = oldop;
a0d0e21e
LW
1930 return retval;
1931}
1932
14dd3ad8 1933#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1934STATIC void *
14dd3ad8 1935S_vcall_body(pTHX_ va_list args)
312caa8e
CS
1936{
1937 OP *myop = va_arg(args, OP*);
1938 int is_eval = va_arg(args, int);
1939
14dd3ad8 1940 call_body(myop, is_eval);
312caa8e
CS
1941 return NULL;
1942}
14dd3ad8 1943#endif
312caa8e
CS
1944
1945STATIC void
14dd3ad8 1946S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1947{
312caa8e
CS
1948 if (PL_op == myop) {
1949 if (is_eval)
f807eda9 1950 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1951 else
f807eda9 1952 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
1953 }
1954 if (PL_op)
cea2e8a9 1955 CALLRUNOPS(aTHX);
312caa8e
CS
1956}
1957
6e72f9df 1958/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1959
954c1994
GS
1960/*
1961=for apidoc p||eval_sv
1962
1963Tells Perl to C<eval> the string in the SV.
1964
1965=cut
1966*/
1967
a0d0e21e 1968I32
864dbfa3 1969Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1970
8ac85365 1971 /* See G_* flags in cop.h */
a0d0e21e 1972{
924508f0 1973 dSP;
a0d0e21e 1974 UNOP myop; /* fake syntax tree node */
8fa7f367 1975 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 1976 volatile I32 retval = 0;
4633a7c4 1977 I32 oldscope;
6224f72b 1978 int ret;
533c011a 1979 OP* oldop = PL_op;
db36c5a1 1980 dJMPENV;
84902520 1981
4633a7c4
LW
1982 if (flags & G_DISCARD) {
1983 ENTER;
1984 SAVETMPS;
1985 }
1986
462e5cf6 1987 SAVEOP();
533c011a
NIS
1988 PL_op = (OP*)&myop;
1989 Zero(PL_op, 1, UNOP);
3280af22
NIS
1990 EXTEND(PL_stack_sp, 1);
1991 *++PL_stack_sp = sv;
1992 oldscope = PL_scopestack_ix;
79072805 1993
4633a7c4
LW
1994 if (!(flags & G_NOARGS))
1995 myop.op_flags = OPf_STACKED;
79072805 1996 myop.op_next = Nullop;
6e72f9df 1997 myop.op_type = OP_ENTEREVAL;
54310121
PP
1998 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1999 (flags & G_ARRAY) ? OPf_WANT_LIST :
2000 OPf_WANT_SCALAR);
6e72f9df
PP
2001 if (flags & G_KEEPERR)
2002 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2003
14dd3ad8 2004#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2005 redo_body:
14dd3ad8 2006 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2007 (OP*)&myop, TRUE);
14dd3ad8
GS
2008#else
2009 JMPENV_PUSH(ret);
2010#endif
6224f72b
GS
2011 switch (ret) {
2012 case 0:
14dd3ad8
GS
2013#ifndef PERL_FLEXIBLE_EXCEPTIONS
2014 redo_body:
2015 call_body((OP*)&myop,TRUE);
2016#endif
312caa8e
CS
2017 retval = PL_stack_sp - (PL_stack_base + oldmark);
2018 if (!(flags & G_KEEPERR))
2019 sv_setpv(ERRSV,"");
4633a7c4 2020 break;
6224f72b 2021 case 1:
f86702cc 2022 STATUS_ALL_FAILURE;
4633a7c4 2023 /* FALL THROUGH */
6224f72b 2024 case 2:
4633a7c4 2025 /* my_exit() was called */
3280af22 2026 PL_curstash = PL_defstash;
4633a7c4 2027 FREETMPS;
14dd3ad8 2028 JMPENV_POP;
cc3604b1 2029 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2030 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2031 my_exit_jump();
4633a7c4 2032 /* NOTREACHED */
6224f72b 2033 case 3:
3280af22 2034 if (PL_restartop) {
533c011a 2035 PL_op = PL_restartop;
3280af22 2036 PL_restartop = 0;
312caa8e 2037 goto redo_body;
4633a7c4 2038 }
3280af22 2039 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2040 if (flags & G_ARRAY)
2041 retval = 0;
2042 else {
2043 retval = 1;
3280af22 2044 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2045 }
312caa8e 2046 break;
4633a7c4
LW
2047 }
2048
14dd3ad8 2049 JMPENV_POP;
4633a7c4 2050 if (flags & G_DISCARD) {
3280af22 2051 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2052 retval = 0;
2053 FREETMPS;
2054 LEAVE;
2055 }
533c011a 2056 PL_op = oldop;
4633a7c4
LW
2057 return retval;
2058}
2059
954c1994
GS
2060/*
2061=for apidoc p||eval_pv
2062
2063Tells Perl to C<eval> the given string and return an SV* result.
2064
2065=cut
2066*/
2067
137443ea 2068SV*
864dbfa3 2069Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2070{
2071 dSP;
2072 SV* sv = newSVpv(p, 0);
2073
864dbfa3 2074 eval_sv(sv, G_SCALAR);
137443ea
PP
2075 SvREFCNT_dec(sv);
2076
2077 SPAGAIN;
2078 sv = POPs;
2079 PUTBACK;
2080
2d8e6c8d
GS
2081 if (croak_on_error && SvTRUE(ERRSV)) {
2082 STRLEN n_a;
cea2e8a9 2083 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2084 }
137443ea
PP
2085
2086 return sv;
2087}
2088
4633a7c4
LW
2089/* Require a module. */
2090
954c1994
GS
2091/*
2092=for apidoc p||require_pv
2093
7d3fb230
BS
2094Tells Perl to C<require> the file named by the string argument. It is
2095analogous to the Perl code C<eval "require '$file'">. It's even
2096implemented that way; consider using Perl_load_module instead.
954c1994 2097
7d3fb230 2098=cut */
954c1994 2099
4633a7c4 2100void
864dbfa3 2101Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2102{
d3acc0f7
JP
2103 SV* sv;
2104 dSP;
e788e7d3 2105 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2106 PUTBACK;
2107 sv = sv_newmortal();
4633a7c4
LW
2108 sv_setpv(sv, "require '");
2109 sv_catpv(sv, pv);
2110 sv_catpv(sv, "'");
864dbfa3 2111 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2112 SPAGAIN;
2113 POPSTACK;
79072805
LW
2114}
2115
79072805 2116void
864dbfa3 2117Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW
2118{
2119 register GV *gv;
2120
155aba94 2121 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2122 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2123}
2124
76e3520e 2125STATIC void
cea2e8a9 2126S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2127{
ab821d7f 2128 /* This message really ought to be max 23 lines.
75c72d73 2129 * Removed -h because the user already knows that option. Others? */
fb73857a 2130
76e3520e 2131 static char *usage_msg[] = {
fb73857a
PP
2132"-0[octal] specify record separator (\\0, if no argument)",
2133"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2134"-C enable native wide character system interfaces",
1950ee41 2135"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2136"-d[:debugger] run program under debugger",
2137"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2138"-e 'command' one line of program (several -e's allowed, omit programfile)",
2139"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2140"-i[extension] edit <> files in place (makes backup if extension supplied)",
2141"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2142"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2143"-[mM][-]module execute `use/no module...' before executing program",
2144"-n assume 'while (<>) { ... }' loop around program",
2145"-p assume loop like -n but print line also, like sed",
2146"-P run program through C preprocessor before compilation",
2147"-s enable rudimentary parsing for switches after programfile",
2148"-S look for programfile using PATH environment variable",
2149"-T enable tainting checks",
2150"-u dump core after parsing program",
fb73857a 2151"-U allow unsafe operations",
aac3bd0d
GS
2152"-v print version, subversion (includes VERY IMPORTANT perl info)",
2153"-V[:variable] print configuration summary (or a single Config.pm variable)",
2154"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS
2155"-W enable all warnings",
2156"-X disable all warnings",
fb73857a
PP
2157"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2158"\n",
2159NULL
2160};
76e3520e 2161 char **p = usage_msg;
fb73857a 2162
b0e47665
GS
2163 PerlIO_printf(PerlIO_stdout(),
2164 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2165 name);
fb73857a 2166 while (*p)
b0e47665 2167 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2168}
2169
79072805
LW
2170/* This routine handles any switches that can be given during run */
2171
2172char *
864dbfa3 2173Perl_moreswitches(pTHX_ char *s)
79072805 2174{
ba210ebe 2175 STRLEN numlen;
c07a80fd 2176 U32 rschar;
79072805
LW
2177
2178 switch (*s) {
2179 case '0':
a863c7d1 2180 {
53305cf1
NC
2181 I32 flags = 0;
2182 numlen = 4;
2183 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
8bfdd7d9 2184 SvREFCNT_dec(PL_rs);
c07a80fd 2185 if (rschar & ~((U8)~0))
8bfdd7d9 2186 PL_rs = &PL_sv_undef;
c07a80fd 2187 else if (!rschar && numlen >= 2)
8bfdd7d9 2188 PL_rs = newSVpvn("", 0);
c07a80fd
PP
2189 else {
2190 char ch = rschar;
8bfdd7d9 2191 PL_rs = newSVpvn(&ch, 1);
79072805
LW
2192 }
2193 return s + numlen;
a863c7d1 2194 }
46487f74
GS
2195 case 'C':
2196 PL_widesyscalls = TRUE;
2197 s++;
2198 return s;
2304df62 2199 case 'F':
3280af22 2200 PL_minus_F = TRUE;
ebce5377
RGS
2201 PL_splitstr = ++s;
2202 while (*s && !isSPACE(*s)) ++s;
2203 *s = '\0';
2204 PL_splitstr = savepv(PL_splitstr);
2304df62 2205 return s;
79072805 2206 case 'a':
3280af22 2207 PL_minus_a = TRUE;
79072805
LW
2208 s++;
2209 return s;
2210 case 'c':
3280af22 2211 PL_minus_c = TRUE;
79072805
LW
2212 s++;
2213 return s;
2214 case 'd':
bbce6d69 2215 forbid_setid("-d");
4633a7c4 2216 s++;
70c94a19
RR
2217 /* The following permits -d:Mod to accepts arguments following an =
2218 in the fashion that -MSome::Mod does. */
2219 if (*s == ':' || *s == '=') {
2220 char *start;
2221 SV *sv;
2222 sv = newSVpv("use Devel::", 0);
2223 start = ++s;
2224 /* We now allow -d:Module=Foo,Bar */
2225 while(isALNUM(*s) || *s==':') ++s;
2226 if (*s != '=')
2227 sv_catpv(sv, start);
2228 else {
2229 sv_catpvn(sv, start, s-start);
2230 sv_catpv(sv, " split(/,/,q{");
2231 sv_catpv(sv, ++s);
2232 sv_catpv(sv, "})");
2233 }
4633a7c4 2234 s += strlen(s);
70c94a19 2235 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2236 }
ed094faf 2237 if (!PL_perldb) {
3280af22 2238 PL_perldb = PERLDB_ALL;
a0d0e21e 2239 init_debugger();
ed094faf 2240 }
79072805
LW
2241 return s;
2242 case 'D':
0453d815 2243 {
79072805 2244#ifdef DEBUGGING
bbce6d69 2245 forbid_setid("-D");
79072805 2246 if (isALPHA(s[1])) {
04932ac8
DM
2247 /* if adding extra options, remember to update DEBUG_MASK */
2248 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW
2249 char *d;
2250
93a17b20 2251 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2252 PL_debug |= 1 << (d - debopts);
79072805
LW
2253 }
2254 else {
3280af22 2255 PL_debug = atoi(s+1);
79072805
LW
2256 for (s++; isDIGIT(*s); s++) ;
2257 }
aea4f609 2258 PL_debug |= DEBUG_TOP_FLAG;
79072805 2259#else
0453d815
PM
2260 if (ckWARN_d(WARN_DEBUGGING))
2261 Perl_warner(aTHX_ WARN_DEBUGGING,
2262 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2263 for (s++; isALNUM(*s); s++) ;
79072805
LW
2264#endif
2265 /*SUPPRESS 530*/
2266 return s;
0453d815 2267 }
4633a7c4 2268 case 'h':
ac27b0f5 2269 usage(PL_origargv[0]);
6ad3d225 2270 PerlProc_exit(0);
79072805 2271 case 'i':
3280af22
NIS
2272 if (PL_inplace)
2273 Safefree(PL_inplace);
2274 PL_inplace = savepv(s+1);
79072805 2275 /*SUPPRESS 530*/
3280af22 2276 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2277 if (*s) {
fb73857a 2278 *s++ = '\0';
7b8d334a
GS
2279 if (*s == '-') /* Additional switches on #! line. */
2280 s++;
2281 }
fb73857a 2282 return s;
4e49a025 2283 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2284 forbid_setid("-I");
fb73857a
PP
2285 ++s;
2286 while (*s && isSPACE(*s))
2287 ++s;
2288 if (*s) {
774d564b 2289 char *e, *p;
0df16ed7
GS
2290 p = s;
2291 /* ignore trailing spaces (possibly followed by other switches) */
2292 do {
2293 for (e = p; *e && !isSPACE(*e); e++) ;
2294 p = e;
2295 while (isSPACE(*p))
2296 p++;
2297 } while (*p && *p != '-');
2298 e = savepvn(s, e-s);
9c8a64f0 2299 incpush(e, TRUE, TRUE);
0df16ed7
GS
2300 Safefree(e);
2301 s = p;
2302 if (*s == '-')
2303 s++;
79072805
LW
2304 }
2305 else
a67e862a 2306 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2307 return s;
79072805 2308 case 'l':
3280af22 2309 PL_minus_l = TRUE;
79072805 2310 s++;
7889fe52
NIS
2311 if (PL_ors_sv) {
2312 SvREFCNT_dec(PL_ors_sv);
2313 PL_ors_sv = Nullsv;
2314 }
79072805 2315 if (isDIGIT(*s)) {
53305cf1 2316 I32 flags = 0;
7889fe52 2317 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2318 numlen = 3 + (*s == '0');
2319 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2320 s += numlen;
2321 }
2322 else {
8bfdd7d9 2323 if (RsPARA(PL_rs)) {
7889fe52
NIS
2324 PL_ors_sv = newSVpvn("\n\n",2);
2325 }
2326 else {
8bfdd7d9 2327 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2328 }
79072805
LW
2329 }
2330 return s;
1a30305b 2331 case 'M':
bbce6d69 2332 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2333 /* FALL THROUGH */
2334 case 'm':
bbce6d69 2335 forbid_setid("-m"); /* XXX ? */
1a30305b 2336 if (*++s) {
a5f75d66 2337 char *start;
11343788 2338 SV *sv;
a5f75d66
AD
2339 char *use = "use ";
2340 /* -M-foo == 'no foo' */
2341 if (*s == '-') { use = "no "; ++s; }
11343788 2342 sv = newSVpv(use,0);
a5f75d66 2343 start = s;
1a30305b 2344 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2345 while(isALNUM(*s) || *s==':') ++s;
2346 if (*s != '=') {
11343788 2347 sv_catpv(sv, start);
c07a80fd
PP
2348 if (*(start-1) == 'm') {
2349 if (*s != '\0')
cea2e8a9 2350 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2351 sv_catpv( sv, " ()");
c07a80fd
PP
2352 }
2353 } else {
6df41af2 2354 if (s == start)
be98fb35
GS
2355 Perl_croak(aTHX_ "Module name required with -%c option",
2356 s[-1]);
11343788
MB
2357 sv_catpvn(sv, start, s-start);
2358 sv_catpv(sv, " split(/,/,q{");
2359 sv_catpv(sv, ++s);
2360 sv_catpv(sv, "})");
c07a80fd 2361 }
1a30305b 2362 s += strlen(s);
5c831c24 2363 if (!PL_preambleav)
3280af22
NIS
2364 PL_preambleav = newAV();
2365 av_push(PL_preambleav, sv);
1a30305b
PP
2366 }
2367 else
cea2e8a9 2368 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2369 return s;
79072805 2370 case 'n':
3280af22 2371 PL_minus_n = TRUE;
79072805
LW
2372 s++;
2373 return s;
2374 case 'p':
3280af22 2375 PL_minus_p = TRUE;
79072805
LW
2376 s++;
2377 return s;
2378 case 's':
bbce6d69 2379 forbid_setid("-s");
3280af22 2380 PL_doswitches = TRUE;
79072805
LW
2381 s++;
2382 return s;
6537fe72
MS
2383 case 't':
2384 if (!PL_tainting)
2385 Perl_croak(aTHX_ "Too late for \"-t\" option");
2386 s++;
2387 return s;
463ee0b2 2388 case 'T':
3280af22 2389 if (!PL_tainting)
cea2e8a9 2390 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW
2391 s++;
2392 return s;
79072805 2393 case 'u':
bf4acbe4
GS
2394#ifdef MACOS_TRADITIONAL
2395 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2396#endif
3280af22 2397 PL_do_undump = TRUE;
79072805
LW
2398 s++;
2399 return s;
2400 case 'U':
3280af22 2401 PL_unsafe = TRUE;
79072805
LW
2402 s++;
2403 return s;
2404 case 'v':
8e9464f1 2405#if !defined(DGUX)
b0e47665 2406 PerlIO_printf(PerlIO_stdout(),
d2560b70 2407 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2408 PL_patchlevel, ARCHNAME));
8e9464f1
JH
2409#else /* DGUX */
2410/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2411 PerlIO_printf(PerlIO_stdout(),
2412 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2413 PerlIO_printf(PerlIO_stdout(),
2414 Perl_form(aTHX_ " built under %s at %s %s\n",
2415 OSNAME, __DATE__, __TIME__));
2416 PerlIO_printf(PerlIO_stdout(),
2417 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2418 OSVERS));
8e9464f1
JH
2419#endif /* !DGUX */
2420
fb73857a
PP
2421#if defined(LOCAL_PATCH_COUNT)
2422 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2423 PerlIO_printf(PerlIO_stdout(),
2424 "\n(with %d registered patch%s, "
2425 "see perl -V for more detail)",
2426 (int)LOCAL_PATCH_COUNT,
2427 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2428#endif
1a30305b 2429
b0e47665 2430 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2431 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH
2432#ifdef MACOS_TRADITIONAL
2433 PerlIO_printf(PerlIO_stdout(),
03765510
JH
2434 "\nMac OS port Copyright 1991-2001, Matthias Neeracher;\n"
2435 "maintained by Chris Nandor\n");
eae9c151 2436#endif
79072805 2437#ifdef MSDOS
b0e47665
GS
2438 PerlIO_printf(PerlIO_stdout(),
2439 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2440#endif
2441#ifdef DJGPP
b0e47665
GS
2442 PerlIO_printf(PerlIO_stdout(),
2443 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2444 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2445#endif
79072805 2446#ifdef OS2
b0e47665
GS
2447 PerlIO_printf(PerlIO_stdout(),
2448 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2449 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2450#endif
79072805 2451#ifdef atarist
b0e47665
GS
2452 PerlIO_printf(PerlIO_stdout(),
2453 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2454#endif
a3f9223b 2455#ifdef __BEOS__
b0e47665
GS
2456 PerlIO_printf(PerlIO_stdout(),
2457 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2458#endif
1d84e8df 2459#ifdef MPE
b0e47665 2460 PerlIO_printf(PerlIO_stdout(),
dc22e1c4 2461 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2001\n");
1d84e8df 2462#endif
9d116dd7 2463#ifdef OEMVS
b0e47665
GS
2464 PerlIO_printf(PerlIO_stdout(),
2465 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2466#endif
495c5fdc 2467#ifdef __VOS__
b0e47665
GS
2468 PerlIO_printf(PerlIO_stdout(),
2469 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2470#endif
092bebab 2471#ifdef __OPEN_VM
b0e47665
GS
2472 PerlIO_printf(PerlIO_stdout(),
2473 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2474#endif
a1a0e61e 2475#ifdef POSIX_BC
b0e47665
GS
2476 PerlIO_printf(PerlIO_stdout(),
2477 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2478#endif
61ae2fbf 2479#ifdef __MINT__
b0e47665
GS
2480 PerlIO_printf(PerlIO_stdout(),
2481 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2482#endif
f83d2536 2483#ifdef EPOC
b0e47665
GS
2484 PerlIO_printf(PerlIO_stdout(),
2485 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2486#endif
e1caacb4
JH
2487#ifdef UNDER_CE
2488 printf("WINCE port by Rainer Keuchel, 2001\n");
2489 printf("Built on " __DATE__ " " __TIME__ "\n\n");
2490 wce_hitreturn();
2491#endif
baed7233
DL
2492#ifdef BINARY_BUILD_NOTICE
2493 BINARY_BUILD_NOTICE;
2494#endif
b0e47665
GS
2495 PerlIO_printf(PerlIO_stdout(),
2496 "\n\
79072805 2497Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2498GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2499Complete documentation for Perl, including FAQ lists, should be found on\n\
2500this system using `man perl' or `perldoc perl'. If you have access to the\n\
2501Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2502 PerlProc_exit(0);
79072805 2503 case 'w':
599cee73 2504 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2505 PL_dowarn |= G_WARN_ON;
599cee73
PM
2506 s++;
2507 return s;
2508 case 'W':
ac27b0f5 2509 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
d3a7d8c7 2510 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2511 s++;
2512 return s;
2513 case 'X':
ac27b0f5 2514 PL_dowarn = G_WARN_ALL_OFF;
d3a7d8c7 2515 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2516 s++;
2517 return s;
a0d0e21e 2518 case '*':
79072805
LW
2519 case ' ':
2520 if (s[1] == '-') /* Additional switches on #! line. */
2521 return s+2;
2522 break;
a0d0e21e 2523 case '-':
79072805 2524 case 0:
51882d45 2525#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2526 case '\r':
2527#endif
79072805
LW
2528 case '\n':
2529 case '\t':
2530 break;
aa689395
PP
2531#ifdef ALTERNATE_SHEBANG
2532 case 'S': /* OS/2 needs -S on "extproc" line. */
2533 break;
2534#endif
a0d0e21e 2535 case 'P':
3280af22 2536 if (PL_preprocess)
a0d0e21e
LW
2537 return s+1;
2538 /* FALL THROUGH */
79072805 2539 default:
cea2e8a9 2540 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2541 }
2542 return Nullch;
2543}
2544
2545/* compliments of Tom Christiansen */
2546
2547/* unexec() can be found in the Gnu emacs distribution */
ee580363 2548/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2549
2550void
864dbfa3 2551Perl_my_unexec(pTHX)
79072805
LW
2552{
2553#ifdef UNEXEC
46fc3d4c
PP
2554 SV* prog;
2555 SV* file;
ee580363 2556 int status = 1;
79072805
LW
2557 extern int etext;
2558
ee580363 2559 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2560 sv_catpv(prog, "/perl");
6b88bc9c 2561 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2562 sv_catpv(file, ".perldump");
79072805 2563
ee580363
GS
2564 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2565 /* unexec prints msg to stderr in case of failure */
6ad3d225 2566 PerlProc_exit(status);
79072805 2567#else
a5f75d66
AD
2568# ifdef VMS
2569# include <lib$routines.h>
2570 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2571# else
79072805 2572 ABORT(); /* for use with undump */
aa689395 2573# endif
a5f75d66 2574#endif
79072805
LW
2575}
2576
cb68f92d
GS
2577/* initialize curinterp */
2578STATIC void
cea2e8a9 2579S_init_interp(pTHX)
cb68f92d
GS
2580{
2581
acfe0abc
GS
2582#ifdef MULTIPLICITY
2583# define PERLVAR(var,type)
2584# define PERLVARA(var,n,type)
2585# if defined(PERL_IMPLICIT_CONTEXT)
2586# if defined(USE_5005THREADS)
2587# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2588# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
2589# else /* !USE_5005THREADS */
2590# define PERLVARI(var,type,init) aTHX->var = init;
2591# define PERLVARIC(var,type,init) aTHX->var = init;
2592# endif /* USE_5005THREADS */
3967c732 2593# else
acfe0abc
GS
2594# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2595# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2596# endif
acfe0abc
GS
2597# include "intrpvar.h"
2598# ifndef USE_5005THREADS
2599# include "thrdvar.h"
2600# endif
2601# undef PERLVAR
2602# undef PERLVARA
2603# undef PERLVARI
2604# undef PERLVARIC
2605#else
2606# define PERLVAR(var,type)
2607# define PERLVARA(var,n,type)
2608# define PERLVARI(var,type,init) PL_##var = init;
2609# define PERLVARIC(var,type,init) PL_##var = init;
2610# include "intrpvar.h"
2611# ifndef USE_5005THREADS
2612# include "thrdvar.h"
2613# endif
2614# undef PERLVAR
2615# undef PERLVARA
2616# undef PERLVARI
2617# undef PERLVARIC
cb68f92d
GS
2618#endif
2619
cb68f92d
GS
2620}
2621
76e3520e 2622STATIC void
cea2e8a9 2623S_init_main_stash(pTHX)
79072805 2624{
463ee0b2 2625 GV *gv;
6e72f9df 2626
3d47000e 2627
ac27b0f5 2628
3280af22 2629 PL_curstash = PL_defstash = newHV();
79cb57f6 2630 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
2631 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2632 SvREFCNT_dec(GvHV(gv));
3280af22 2633 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2634 SvREADONLY_on(gv);
3280af22
NIS
2635 HvNAME(PL_defstash) = savepv("main");
2636 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2637 GvMULTI_on(PL_incgv);
2638 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2639 GvMULTI_on(PL_hintgv);
2640 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2641 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2642 GvMULTI_on(PL_errgv);
2643 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2644 GvMULTI_on(PL_replgv);
cea2e8a9 2645 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
2646 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2647 sv_setpvn(ERRSV, "", 0);
3280af22 2648 PL_curstash = PL_defstash;
11faa288 2649 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2650 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2651 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2652 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2653 /* We must init $/ before switches are processed. */
864dbfa3 2654 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
2655}
2656
76e3520e 2657STATIC void
cea2e8a9 2658S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2659{
1b24ed4b
MS
2660 char *quote;
2661 char *code;
2662 char *cpp_discard_flag;
2663 char *perl;
2664
6c4ab083 2665 *fdscript = -1;
79072805 2666
3280af22
NIS
2667 if (PL_e_script) {
2668 PL_origfilename = savepv("-e");
96436eeb 2669 }
6c4ab083
GS
2670 else {
2671 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2672 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
2673
2674 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2675 char *s = scriptname + 8;
2676 *fdscript = atoi(s);
2677 while (isDIGIT(*s))
2678 s++;
2679 if (*s) {
2680 scriptname = savepv(s + 1);
3280af22
NIS
2681 Safefree(PL_origfilename);
2682 PL_origfilename = scriptname;
6c4ab083
GS
2683 }
2684 }
2685 }
2686
1b24ed4b
MS
2687# ifdef USE_ITHREADS
2688 Safefree(CopFILE(PL_curcop));
2689# else
2690 SvREFCNT_dec(CopFILEGV(PL_curcop));
2691# endif
57843af0 2692 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2693 if (strEQ(PL_origfilename,"-"))
79072805 2694 scriptname = "";
01f988be 2695 if (*fdscript >= 0) {
3280af22 2696 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS
2697# if defined(HAS_FCNTL) && defined(F_SETFD)
2698 if (PL_rsfp)
2699 /* ensure close-on-exec */
2700 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2701# endif
96436eeb 2702 }
3280af22 2703 else if (PL_preprocess) {
46fc3d4c 2704 char *cpp_cfg = CPPSTDIN;
79cb57f6 2705 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
2706 SV *cmd = NEWSV(0,0);
2707
2708 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2709 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2710 sv_catpv(cpp, cpp_cfg);
79072805 2711
1b24ed4b
MS
2712# ifndef VMS
2713 sv_catpvn(sv, "-I", 2);
2714 sv_catpv(sv,PRIVLIB_EXP);
2715# endif
46fc3d4c 2716
14953ddc
MB
2717 DEBUG_P(PerlIO_printf(Perl_debug_log,
2718 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2719 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS
2720
2721# if defined(MSDOS) || defined(WIN32) || defined(VMS)
2722 quote = "\"";
2723# else
2724 quote = "'";
2725# endif
2726
2727# ifdef VMS
2728 cpp_discard_flag = "";
2729# else
2730 cpp_discard_flag = "-C";
2731# endif
2732
2733# ifdef OS2
2734 perl = os2_execname(aTHX);
2735# else
2736 perl = PL_origargv[0];
2737# endif
2738
2739
2740 /* This strips off Perl comments which might interfere with
2741 the C pre-processor, including #!. #line directives are
2742 deliberately stripped to avoid confusion with Perl's version
2743 of #line. FWP played some golf with it so it will fit
2744 into VMS's 255 character buffer.
2745 */
2746 if( PL_doextract )
2747 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2748 else
2749 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2750
2751 Perl_sv_setpvf(aTHX_ cmd, "\
2752%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
2753 perl, quote, code, quote, scriptname, cpp,
2754 cpp_discard_flag, sv, CPPMINUS);
2755
3280af22 2756 PL_doextract = FALSE;
1b24ed4b
MS
2757# ifdef IAMSUID /* actually, this is caught earlier */
2758 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2759# ifdef HAS_SETEUID
2760 (void)seteuid(PL_uid); /* musn't stay setuid root */
2761# else
2762# ifdef HAS_SETREUID
2763 (void)setreuid((Uid_t)-1, PL_uid);
2764# else
2765# ifdef HAS_SETRESUID
2766 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2767# else
2768 PerlProc_setuid(PL_uid);
2769# endif
2770# endif
2771# endif
b28d0864 2772 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2773 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805 2774 }
1b24ed4b 2775# endif /* IAMSUID */
0a6c758d 2776
1b24ed4b
MS
2777 DEBUG_P(PerlIO_printf(Perl_debug_log,
2778 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS
2779 SvPVX(cmd)));
2780
3280af22 2781 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c
PP
2782 SvREFCNT_dec(cmd);
2783 SvREFCNT_dec(cpp);
79072805
LW
2784 }
2785 else if (!*scriptname) {
bbce6d69 2786 forbid_setid("program input from stdin");
3280af22 2787 PL_rsfp = PerlIO_stdin();
79072805 2788 }
96436eeb 2789 else {
3280af22 2790 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS
2791# if defined(HAS_FCNTL) && defined(F_SETFD)
2792 if (PL_rsfp)
2793 /* ensure close-on-exec */
2794 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2795# endif
96436eeb 2796 }
3280af22 2797 if (!PL_rsfp) {
1b24ed4b
MS
2798# ifdef DOSUID
2799# ifndef IAMSUID /* in case script is not readable before setuid */
2800 if (PL_euid &&
2801 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
2802 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2803 {
2804 /* try again */
2805 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT,
2806 BIN_EXP, (int)PERL_REVISION,
2807 (int)PERL_VERSION,
2808 (int)PERL_SUBVERSION), PL_origargv);
2809 Perl_croak(aTHX_ "Can't do setuid\n");
2810 }
2811# endif
2812# endif
2813# ifdef IAMSUID
2814 errno = EPERM;
2815 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2816 Strerror(errno));
2817# else
2818 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
2819 CopFILE(PL_curcop), Strerror(errno));
2820# endif
13281fa4 2821 }
79072805 2822}
8d063cd8 2823
7b89560d
JH
2824/* Mention
2825 * I_SYSSTATVFS HAS_FSTATVFS
2826 * I_SYSMOUNT
c890dc6c 2827 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
2828 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2829 * here so that metaconfig picks them up. */
2830
104d25b7 2831#ifdef IAMSUID
864dbfa3 2832STATIC int
e688b231 2833S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2834{
0545a864
JH
2835 int check_okay = 0; /* able to do all the required sys/libcalls */
2836 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2837/*
ad27e871 2838 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2839 * fstatvfs() is UNIX98.
0545a864 2840 * fstatfs() is 4.3 BSD.
ad27e871 2841 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
2842 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2843 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
2844 */
2845
6439433f
JH
2846#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2847
2848# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2849 defined(HAS_FSTATVFS)
2850# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2851 struct statvfs stfs;
6439433f 2852
104d25b7
JH
2853 check_okay = fstatvfs(fd, &stfs) == 0;
2854 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2855# endif /* fstatvfs */
ac27b0f5 2856
6439433f
JH
2857# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2858 defined(PERL_MOUNT_NOSUID) && \
2859 defined(HAS_FSTATFS) && \
2860 defined(HAS_STRUCT_STATFS) && \
2861 defined(HAS_STRUCT_STATFS_F_FLAGS)
2862# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2863 struct statfs stfs;
6439433f 2864
104d25b7 2865 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2866 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH
2867# endif /* fstatfs */
2868
2869# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2870 defined(PERL_MOUNT_NOSUID) && \
2871 defined(HAS_FSTAT) && \
2872 defined(HAS_USTAT) && \
2873 defined(HAS_GETMNT) && \
2874 defined(HAS_STRUCT_FS_DATA) && \
2875 defined(NOSTAT_ONE)
2876# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2877 struct stat fdst;
6439433f 2878
0545a864 2879 if (fstat(fd, &fdst) == 0) {
6439433f
JH
2880 struct ustat us;
2881 if (ustat(fdst.st_dev, &us) == 0) {
2882 struct fs_data fsd;
2883 /* NOSTAT_ONE here because we're not examining fields which
2884 * vary between that case and STAT_ONE. */
ad27e871 2885 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
2886 size_t cmplen = sizeof(us.f_fname);
2887 if (sizeof(fsd.fd_req.path) < cmplen)
2888 cmplen = sizeof(fsd.fd_req.path);
2889 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2890 fdst.st_dev == fsd.fd_req.dev) {
2891 check_okay = 1;
2892 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2893 }
2894 }
2895 }
2896 }
0545a864 2897 }
6439433f
JH
2898# endif /* fstat+ustat+getmnt */
2899
2900# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2901 defined(HAS_GETMNTENT) && \
2902 defined(HAS_HASMNTOPT) && \
2903 defined(MNTOPT_NOSUID)
2904# define FD_ON_NOSUID_CHECK_OKAY
2905 FILE *mtab = fopen("/etc/mtab", "r");
2906 struct mntent *entry;
2907 struct stat stb, fsb;
104d25b7
JH
2908
2909 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
2910 while (entry = getmntent(mtab)) {
2911 if (stat(entry->mnt_dir, &fsb) == 0
2912 && fsb.st_dev == stb.st_dev)
2913 {
2914 /* found the filesystem */
2915 check_okay = 1;
2916 if (hasmntopt(entry, MNTOPT_NOSUID))
2917 on_nosuid = 1;
2918 break;
2919 } /* A single fs may well fail its stat(). */
2920 }
104d25b7
JH
2921 }
2922 if (mtab)
6439433f
JH
2923 fclose(mtab);
2924# endif /* getmntent+hasmntopt */
0545a864 2925
ac27b0f5 2926 if (!check_okay)
0545a864 2927 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH
2928 return on_nosuid;
2929}
2930#endif /* IAMSUID */
2931
76e3520e 2932STATIC void
cea2e8a9 2933S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2934{
155aba94 2935#ifdef IAMSUID
96436eeb 2936 int which;
155aba94 2937#endif
96436eeb 2938
13281fa4
LW
2939 /* do we need to emulate setuid on scripts? */
2940
2941 /* This code is for those BSD systems that have setuid #! scripts disabled
2942 * in the kernel because of a security problem. Merely defining DOSUID
2943 * in perl will not fix that problem, but if you have disabled setuid
2944 * scripts in the kernel, this will attempt to emulate setuid and setgid
2945 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
2946 * root version must be called suidperl or sperlN.NNN. If regular perl
2947 * discovers that it has opened a setuid script, it calls suidperl with
2948 * the same argv that it had. If suidperl finds that the script it has
2949 * just opened is NOT setuid root, it sets the effective uid back to the
2950 * uid. We don't just make perl setuid root because that loses the
2951 * effective uid we had before invoking perl, if it was different from the
2952 * uid.
13281fa4
LW
2953 *
2954 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2955 * be defined in suidperl only. suidperl must be setuid root. The
2956 * Configure script will set this up for you if you want it.
2957 */
a687059c 2958
13281fa4 2959#ifdef DOSUID
6e72f9df 2960 char *s, *s2;
a0d0e21e 2961
b28d0864 2962 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2963 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2964 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2965 I32 len;
2d8e6c8d 2966 STRLEN n_a;
13281fa4 2967
a687059c 2968#ifdef IAMSUID
fe14fcc3 2969#ifndef HAS_SETREUID
a687059c
LW
2970 /* On this access check to make sure the directories are readable,
2971 * there is actually a small window that the user could use to make
2972 * filename point to an accessible directory. So there is a faint
2973 * chance that someone could execute a setuid script down in a
2974 * non-accessible directory. I don't know what to do about that.
2975 * But I don't think it's too important. The manual lies when
2976 * it says access() is useful in setuid programs.
2977 */
cc49e20b 2978 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2979 Perl_croak(aTHX_ "Permission denied");
a687059c
LW
2980#else
2981 /* If we can swap euid and uid, then we can determine access rights
2982 * with a simple stat of the file, and then compare device and
2983 * inode to make sure we did stat() on the same file we opened.
2984 * Then we just have to make sure he or she can execute it.
2985 */
2986 {
2987 struct stat tmpstatbuf;
2988
85e6fe83
LW
2989 if (
2990#ifdef HAS_SETREUID
b28d0864 2991 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW
2992#else
2993# if HAS_SETRESUID
b28d0864 2994 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 2995# endif
85e6fe83 2996#endif
b28d0864 2997 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 2998 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 2999 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 3000 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 3001#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 3002 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 3003 Perl_croak(aTHX_ "Permission denied");
104d25b7 3004#endif
b28d0864
NIS
3005 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3006 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3007 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3008 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3009 }
85e6fe83
LW
3010 if (
3011#ifdef HAS_SETREUID
b28d0864 3012 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW
3013#else
3014# if defined(HAS_SETRESUID)
b28d0864 3015 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3016# endif
85e6fe83 3017#endif
b28d0864 3018 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3019 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3020 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3021 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3022 }
fe14fcc3 3023#endif /* HAS_SETREUID */
a687059c
LW
3024#endif /* IAMSUID */
3025
b28d0864 3026 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3027 Perl_croak(aTHX_ "Permission denied");
b28d0864 3028 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3029 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3030 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3031 CopLINE_inc(PL_curcop);
6b88bc9c 3032 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3033 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3034 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3035 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3036 if (*s == ' ') s++;
45d8adaa 3037 while (!isSPACE(*s)) s++;
2d8e6c8d 3038 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df
PP
3039 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3040 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3041 Perl_croak(aTHX_ "Not a perl script");
a687059c 3042 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3043 /*
3044 * #! arg must be what we saw above. They can invoke it by
3045 * mentioning suidperl explicitly, but they may not add any strange
3046 * arguments beyond what #! says if they do invoke suidperl that way.
3047 */
3048 len = strlen(validarg);
3049 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3050 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3051 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW
3052
3053#ifndef IAMSUID
b28d0864
NIS
3054 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3055 PL_euid == PL_statbuf.st_uid)
3056 if (!PL_do_undump)
cea2e8a9 3057 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3058FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3059#endif /* IAMSUID */
13281fa4 3060
b28d0864
NIS
3061 if (PL_euid) { /* oops, we're not the setuid root perl */
3062 (void)PerlIO_close(PL_rsfp);
13281fa4 3063#ifndef IAMSUID
46fc3d4c 3064 /* try again */
a7cb1f99 3065 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3066 (int)PERL_REVISION, (int)PERL_VERSION,
3067 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3068#endif
cea2e8a9 3069 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
3070 }
3071
b28d0864 3072 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3073#ifdef HAS_SETEGID
b28d0864 3074 (void)setegid(PL_statbuf.st_gid);
a687059c 3075#else
fe14fcc3 3076#ifdef HAS_SETREGID
b28d0864 3077 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW
3078#else
3079#ifdef HAS_SETRESGID
b28d0864 3080 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3081#else
b28d0864 3082 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW
3083#endif
3084#endif
85e6fe83 3085#endif
b28d0864 3086 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3087 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3088 }
b28d0864
NIS
3089 if (PL_statbuf.st_mode & S_ISUID) {
3090 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3091#ifdef HAS_SETEUID
b28d0864 3092 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3093#else
fe14fcc3 3094#ifdef HAS_SETREUID
b28d0864 3095 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW
3096#else
3097#ifdef HAS_SETRESUID
b28d0864 3098 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3099#else
b28d0864 3100 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW
3101#endif
3102#endif
85e6fe83 3103#endif
b28d0864 3104 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3105 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3106 }
b28d0864 3107 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3108#ifdef HAS_SETEUID
b28d0864 3109 (void)seteuid((Uid_t)PL_uid);
a687059c 3110#else
fe14fcc3 3111#ifdef HAS_SETREUID
b28d0864 3112 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3113#else
85e6fe83 3114#ifdef HAS_SETRESUID
b28d0864 3115 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3116#else
b28d0864 3117 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3118#endif
a687059c
LW
3119#endif
3120#endif
b28d0864 3121 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3122 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3123 }
748a9306 3124 init_ids();
b28d0864 3125 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3126 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW
3127 }
3128#ifdef IAMSUID
6b88bc9c 3129 else if (PL_preprocess)
cea2e8a9 3130 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3131 else if (fdscript >= 0)
cea2e8a9 3132 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3133 else
cea2e8a9 3134 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb
PP
3135
3136 /* We absolutely must clear out any saved ids here, so we */
3137 /* exec the real perl, substituting fd script for scriptname. */
3138 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS
3139 PerlIO_rewind(PL_rsfp);
3140 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS
3141 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3142 if (!PL_origargv[which])
cea2e8a9
GS
3143 Perl_croak(aTHX_ "Permission denied");
3144 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3145 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3146#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3147 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3148#endif
a7cb1f99 3149 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3150 (int)PERL_REVISION, (int)PERL_VERSION,
3151 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3152 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3153#endif /* IAMSUID */
a687059c 3154#else /* !DOSUID */
3280af22 3155 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3156#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS
3157 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3158 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3159 ||
b28d0864 3160 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3161 )
b28d0864 3162 if (!PL_do_undump)
cea2e8a9 3163 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3164FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3165#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3166 /* not set-id, must be wrapped */
a687059c 3167 }
13281fa4 3168#endif /* DOSUID */
79072805 3169}
13281fa4 3170
76e3520e 3171STATIC void
cea2e8a9 3172S_find_beginning(pTHX)
79072805 3173{
6e72f9df 3174 register char *s, *s2;
33b78306
LW
3175
3176 /* skip forward in input to the real script? */
3177
bbce6d69 3178 forbid_setid("-x");
bf4acbe4 3179#ifdef MACOS_TRADITIONAL
084592ab 3180 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3181
bf4acbe4
GS
3182 while (PL_doextract || gMacPerl_AlwaysExtract) {
3183 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3184 if (!gMacPerl_AlwaysExtract)
3185 Perl_croak(aTHX_ "No Perl script found in input\n");
3186
3187 if (PL_doextract) /* require explicit override ? */
3188 if (!OverrideExtract(PL_origfilename))
3189 Perl_croak(aTHX_ "User aborted script\n");
3190 else
3191 PL_doextract = FALSE;
3192
3193 /* Pater peccavi, file does not have #! */
3194 PerlIO_rewind(PL_rsfp);
ac27b0f5 3195
bf4acbe4
GS
3196 break;
3197 }
3198#else
3280af22
NIS
3199 while (PL_doextract) {
3200 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3201 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3202#endif
4f0c37ba
IZ
3203 s2 = s;
3204 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS
3205 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3206 PL_doextract = FALSE;
6e72f9df
PP
3207 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3208 s2 = s;
3209 while (*s == ' ' || *s == '\t') s++;
3210 if (*s++ == '-') {
3211 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3212 if (strnEQ(s2-4,"perl",4))
3213 /*SUPPRESS 530*/
155aba94
GS
3214 while ((s = moreswitches(s)))
3215 ;
33b78306 3216 }
95e8664e
CN
3217#ifdef MACOS_TRADITIONAL
3218 break;
3219#endif
83025b21
LW
3220 }
3221 }
3222}
3223
afe37c7d 3224
76e3520e 3225STATIC void
cea2e8a9 3226S_init_ids(pTHX)
352d5a3a 3227{
d8eceb89
JH
3228 PL_uid = PerlProc_getuid();
3229 PL_euid = PerlProc_geteuid();
3230 PL_gid = PerlProc_getgid();
3231 PL_egid = PerlProc_getegid();
748a9306 3232#ifdef VMS
b28d0864
NIS
3233 PL_uid |= PL_gid << 16;
3234 PL_euid |= PL_egid << 16;
748a9306 3235#endif
3280af22 3236 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3237}
79072805 3238
76e3520e 3239STATIC void
cea2e8a9 3240S_forbid_setid(pTHX_ char *s)
bbce6d69 3241{
3280af22 3242 if (PL_euid != PL_uid)
cea2e8a9 3243 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3244 if (PL_egid != PL_gid)
cea2e8a9 3245 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69
PP
3246}
3247
1ee4443e
IZ
3248void
3249Perl_init_debugger(pTHX)
748a9306 3250{
1ee4443e
IZ
3251 HV *ostash = PL_curstash;
3252
3280af22
NIS
3253 PL_curstash = PL_debstash;
3254 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3255 AvREAL_off(PL_dbargs);
3256 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3257 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3258 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3259 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3260 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3261 sv_setiv(PL_DBsingle, 0);
3280af22 3262 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3263 sv_setiv(PL_DBtrace, 0);
3280af22 3264 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3265 sv_setiv(PL_DBsignal, 0);
1ee4443e 3266 PL_curstash = ostash;
352d5a3a
LW
3267}
3268
2ce36478
SM
3269#ifndef STRESS_REALLOC
3270#define REASONABLE(size) (size)
3271#else
3272#define REASONABLE(size) (1) /* unreasonable */
3273#endif
3274
11343788 3275void
cea2e8a9 3276Perl_init_stacks(pTHX)
79072805 3277{
e336de0d 3278 /* start with 128-item stack and 8K cxstack */
3280af22 3279 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3280 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS
3281 PL_curstackinfo->si_type = PERLSI_MAIN;
3282 PL_curstack = PL_curstackinfo->si_stack;
3283 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3284
3280af22
NIS
3285 PL_stack_base = AvARRAY(PL_curstack);
3286 PL_stack_sp = PL_stack_base;
3287 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3288
3280af22
NIS
3289 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3290 PL_tmps_floor = -1;
3291 PL_tmps_ix = -1;
3292 PL_tmps_max = REASONABLE(128);
8990e307 3293
3280af22
NIS
3294 New(54,PL_markstack,REASONABLE(32),I32);
3295 PL_markstack_ptr = PL_markstack;
3296 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3297
ce2f7c3b 3298 SET_MARK_OFFSET;
e336de0d 3299
3280af22
NIS
3300 New(54,PL_scopestack,REASONABLE(32),I32);
3301 PL_scopestack_ix = 0;
3302 PL_scopestack_max = REASONABLE(32);
79072805 3303
3280af22
NIS
3304 New(54,PL_savestack,REASONABLE(128),ANY);
3305 PL_savestack_ix = 0;
3306 PL_savestack_max = REASONABLE(128);
79072805 3307
3280af22
NIS
3308 New(54,PL_retstack,REASONABLE(16),OP*);
3309 PL_retstack_ix = 0;
3310 PL_retstack_max = REASONABLE(16);
378cc40b 3311}
33b78306 3312
2ce36478
SM
3313#undef REASONABLE
3314
76e3520e 3315STATIC void
cea2e8a9 3316S_nuke_stacks(pTHX)
6e72f9df 3317{
3280af22
NIS
3318 while (PL_curstackinfo->si_next)
3319 PL_curstackinfo = PL_curstackinfo->si_next;
3320 while (PL_curstackinfo) {
3321 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3322 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS
3323 Safefree(PL_curstackinfo->si_cxstack);
3324 Safefree(PL_curstackinfo);
3325 PL_curstackinfo = p;
e336de0d 3326 }
3280af22
NIS
3327 Safefree(PL_tmps_stack);
3328 Safefree(PL_markstack);
3329 Safefree(PL_scopestack);
3330 Safefree(PL_savestack);
3331 Safefree(PL_retstack);
378cc40b 3332}
33b78306 3333
76e3520e 3334STATIC void
cea2e8a9 3335S_init_lexer(pTHX)
8990e307 3336{
06039172 3337 PerlIO *tmpfp;
3280af22
NIS
3338 tmpfp = PL_rsfp;
3339 PL_rsfp = Nullfp;
3340 lex_start(PL_linestr);
3341 PL_rsfp = tmpfp;
79cb57f6 3342 PL_subname = newSVpvn("main",4);
8990e307
LW
3343}
3344
76e3520e 3345STATIC void
cea2e8a9 3346S_init_predump_symbols(pTHX)
45d8adaa 3347{
93a17b20 3348 GV *tmpgv;
af8c498a 3349 IO *io;
79072805 3350
864dbfa3 3351 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS
3352 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3353 GvMULTI_on(PL_stdingv);
af8c498a 3354 io = GvIOp(PL_stdingv);
a04651f4 3355 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3356 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3357 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3358 GvMULTI_on(tmpgv);
af8c498a 3359 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3360
85e6fe83 3361 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3362 GvMULTI_on(tmpgv);
af8c498a 3363 io = GvIOp(tmpgv);
a04651f4 3364 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3365 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3366 setdefout(tmpgv);
adbc6bb1 3367 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3368 GvMULTI_on(tmpgv);
af8c498a 3369 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3370
bf49b057
GS
3371 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3372 GvMULTI_on(PL_stderrgv);
3373 io = GvIOp(PL_stderrgv);
a04651f4 3374 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3375 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3376 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3377 GvMULTI_on(tmpgv);
af8c498a 3378 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3379
3280af22 3380 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3381
bf4acbe4
GS
3382 if (PL_osname)
3383 Safefree(PL_osname);
3384 PL_osname = savepv(OSNAME);
79072805 3385}
33b78306 3386
a11ec5a9
RGS
3387void
3388Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
33b78306 3389{
79072805 3390 char *s;
79072805 3391 argc--,argv++; /* skip name of script */
3280af22 3392 if (PL_doswitches) {
79072805
LW
3393 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3394 if (!argv[0][1])
3395 break;
379d538a 3396 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW
3397 argc--,argv++;
3398 break;
3399 }
155aba94 3400 if ((s = strchr(argv[0], '='))) {
79072805 3401 *s++ = '\0';
85e6fe83 3402 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW
3403 }
3404 else
85e6fe83 3405 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3406 }
79072805 3407 }
a11ec5a9
RGS
3408 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3409 GvMULTI_on(PL_argvgv);
3410 (void)gv_AVadd(PL_argvgv);
3411 av_clear(GvAVn(PL_argvgv));
3412 for (; argc > 0; argc--,argv++) {
3413 SV *sv = newSVpv(argv[0],0);
3414 av_push(GvAVn(PL_argvgv),sv);
3415 if (PL_widesyscalls)
3416 (void)sv_utf8_decode(sv);
3417 }
3418 }
3419}
3420
04fee9b5
NIS
3421#ifdef HAS_PROCSELFEXE
3422/* This is a function so that we don't hold on to MAXPATHLEN
8338e367 3423 bytes of stack longer than necessary
04fee9b5
NIS
3424 */
3425STATIC void
3426S_procself_val(pTHX_ SV *sv, char *arg0)
3427{
3428 char buf[MAXPATHLEN];
d13a6521 3429 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
04fee9b5
NIS
3430 if (len > 0) {
3431 sv_setpvn(sv,buf,len);
3432 }
3433 else {
3434 sv_setpv(sv,arg0);
3435 }
3436}
3437#endif /* HAS_PROCSELFEXE */
3438
a11ec5a9
RGS
3439STATIC void
3440S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3441{
3442 char *s;
3443 SV *sv;
3444 GV* tmpgv;
a11ec5a9 3445
3280af22
NIS
3446 PL_toptarget = NEWSV(0,0);
3447 sv_upgrade(PL_toptarget, SVt_PVFM);
3448 sv_setpvn(PL_toptarget, "", 0);
3449 PL_bodytarget = NEWSV(0,0);
3450 sv_upgrade(PL_bodytarget, SVt_PVFM);
3451 sv_setpvn(PL_bodytarget, "", 0);
3452 PL_formtarget = PL_bodytarget;
79072805 3453
bbce6d69 3454 TAINT;
a11ec5a9
RGS
3455
3456 init_argv_symbols(argc,argv);
3457
155aba94 3458 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS
3459#ifdef MACOS_TRADITIONAL
3460 /* $0 is not majick on a Mac */
3461 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3462#else
3280af22 3463 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3464 magicname("0", "0", 1);
bf4acbe4 3465#endif
79072805 3466 }
04fee9b5
NIS
3467 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))) {/* $^X */
3468#ifdef HAS_PROCSELFEXE
3469 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
3470#else
8338e367 3471#ifdef OS2
23da6c43 3472 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
8338e367
JH
3473#else
3474 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
3475#endif
04fee9b5
NIS
3476#endif
3477 }
155aba94 3478 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
79072805 3479 HV *hv;
3280af22
NIS
3480 GvMULTI_on(PL_envgv);
3481 hv = GvHVn(PL_envgv);
14befaf4 3482 hv_magic(hv, Nullgv, PERL_MAGIC_env);
fa6a1c44 3483#ifdef USE_ENVIRON_ARRAY
4633a7c4
LW
3484 /* Note that if the supplied env parameter is actually a copy
3485 of the global environ then it may now point to free'd memory
3486 if the environment has been modified since. To avoid this<