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a0d0e21e
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1/* perl.c
2 *
bc89e66f 3 * Copyright (c) 1987-2001 Larry Wall
a687059c 4 *
352d5a3a
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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
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8 */
9
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10/*
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
12 */
45d8adaa 13
378cc40b 14#include "EXTERN.h"
864dbfa3 15#define PERL_IN_PERL_C
378cc40b 16#include "perl.h"
e3321bb0 17#include "patchlevel.h" /* for local_patches */
378cc40b 18
df5cef82 19/* XXX If this causes problems, set i_unistd=undef in the hint file. */
a0d0e21e
LW
20#ifdef I_UNISTD
21#include <unistd.h>
22#endif
a0d0e21e 23
54310121 24#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
20ce7b12 25char *getenv (char *); /* Usually in <stdlib.h> */
54310121
PP
26#endif
27
0cb96387
GS
28static I32 read_e_script(pTHXo_ int idx, SV *buf_sv, int maxlen);
29
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LW
30#ifdef IAMSUID
31#ifndef DOSUID
32#define DOSUID
33#endif
34#endif
378cc40b 35
a687059c
LW
36#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
37#ifdef DOSUID
38#undef DOSUID
39#endif
40#endif
8d063cd8 41
873ef191 42#ifdef PERL_OBJECT
7766f137
GS
43#define perl_construct Perl_construct
44#define perl_parse Perl_parse
45#define perl_run Perl_run
46#define perl_destruct Perl_destruct
47#define perl_free Perl_free
48#endif
32e30700 49
06d86050
GS
50#if defined(USE_THREADS)
51# define INIT_TLS_AND_INTERP \
52 STMT_START { \
53 if (!PL_curinterp) { \
54 PERL_SET_INTERP(my_perl); \
55 INIT_THREADS; \
56 ALLOC_THREAD_KEY; \
57 } \
58 } STMT_END
59#else
60# if defined(USE_ITHREADS)
61# define INIT_TLS_AND_INTERP \
62 STMT_START { \
63 if (!PL_curinterp) { \
64 PERL_SET_INTERP(my_perl); \
65 INIT_THREADS; \
66 ALLOC_THREAD_KEY; \
534825c4
GS
67 PERL_SET_THX(my_perl); \
68 OP_REFCNT_INIT; \
69 } \
70 else { \
71 PERL_SET_THX(my_perl); \
06d86050 72 } \
06d86050
GS
73 } STMT_END
74# else
75# define INIT_TLS_AND_INTERP \
76 STMT_START { \
77 if (!PL_curinterp) { \
78 PERL_SET_INTERP(my_perl); \
79 } \
80 PERL_SET_THX(my_perl); \
81 } STMT_END
82# endif
83#endif
84
32e30700
GS
85#ifdef PERL_IMPLICIT_SYS
86PerlInterpreter *
7766f137
GS
87perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
88 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
32e30700
GS
89 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
90 struct IPerlDir* ipD, struct IPerlSock* ipS,
91 struct IPerlProc* ipP)
92{
93 PerlInterpreter *my_perl;
7766f137
GS
94#ifdef PERL_OBJECT
95 my_perl = (PerlInterpreter*)new(ipM) CPerlObj(ipM, ipMS, ipMP, ipE, ipStd,
96 ipLIO, ipD, ipS, ipP);
06d86050 97 INIT_TLS_AND_INTERP;
7766f137 98#else
32e30700
GS
99 /* New() needs interpreter, so call malloc() instead */
100 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 101 INIT_TLS_AND_INTERP;
32e30700
GS
102 Zero(my_perl, 1, PerlInterpreter);
103 PL_Mem = ipM;
7766f137
GS
104 PL_MemShared = ipMS;
105 PL_MemParse = ipMP;
32e30700
GS
106 PL_Env = ipE;
107 PL_StdIO = ipStd;
108 PL_LIO = ipLIO;
109 PL_Dir = ipD;
110 PL_Sock = ipS;
111 PL_Proc = ipP;
7766f137
GS
112#endif
113
32e30700
GS
114 return my_perl;
115}
116#else
954c1994
GS
117
118/*
119=for apidoc perl_alloc
120
121Allocates a new Perl interpreter. See L<perlembed>.
122
123=cut
124*/
125
93a17b20 126PerlInterpreter *
cea2e8a9 127perl_alloc(void)
79072805 128{
cea2e8a9 129 PerlInterpreter *my_perl;
79072805 130
54aff467 131 /* New() needs interpreter, so call malloc() instead */
e8ee3774 132 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 133
06d86050 134 INIT_TLS_AND_INTERP;
dedcbb81 135 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 136 return my_perl;
79072805 137}
32e30700 138#endif /* PERL_IMPLICIT_SYS */
79072805 139
954c1994
GS
140/*
141=for apidoc perl_construct
142
143Initializes a new Perl interpreter. See L<perlembed>.
144
145=cut
146*/
147
79072805 148void
0cb96387 149perl_construct(pTHXx)
79072805 150{
a863c7d1
MB
151#ifdef USE_THREADS
152 int i;
153#ifndef FAKE_THREADS
e1f15930 154 struct perl_thread *thr = NULL;
a863c7d1
MB
155#endif /* FAKE_THREADS */
156#endif /* USE_THREADS */
ba869deb 157
8990e307 158#ifdef MULTIPLICITY
54aff467 159 init_interp();
ac27b0f5 160 PL_perl_destruct_level = 1;
54aff467
GS
161#else
162 if (PL_perl_destruct_level > 0)
163 init_interp();
164#endif
165
33f46ff6 166 /* Init the real globals (and main thread)? */
3280af22 167 if (!PL_linestr) {
1feb2720 168#ifdef USE_THREADS
533c011a 169 MUTEX_INIT(&PL_sv_mutex);
a863c7d1
MB
170 /*
171 * Safe to use basic SV functions from now on (though
172 * not things like mortals or tainting yet).
173 */
533c011a
NIS
174 MUTEX_INIT(&PL_eval_mutex);
175 COND_INIT(&PL_eval_cond);
176 MUTEX_INIT(&PL_threads_mutex);
177 COND_INIT(&PL_nthreads_cond);
ba869deb 178# ifdef EMULATE_ATOMIC_REFCOUNTS
533c011a 179 MUTEX_INIT(&PL_svref_mutex);
ba869deb 180# endif /* EMULATE_ATOMIC_REFCOUNTS */
a863c7d1 181
5ff3f7a4 182 MUTEX_INIT(&PL_cred_mutex);
3d35f11b
GS
183 MUTEX_INIT(&PL_sv_lock_mutex);
184 MUTEX_INIT(&PL_fdpid_mutex);
5ff3f7a4 185
199100c8 186 thr = init_main_thread();
11343788
MB
187#endif /* USE_THREADS */
188
14dd3ad8 189#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 190 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 191#endif
312caa8e 192
2aea9f8a
GS
193 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
194
3280af22
NIS
195 PL_linestr = NEWSV(65,79);
196 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 197
3280af22 198 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP
199 /* set read-only and try to insure than we wont see REFCNT==0
200 very often */
201
3280af22
NIS
202 SvREADONLY_on(&PL_sv_undef);
203 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 204
3280af22
NIS
205 sv_setpv(&PL_sv_no,PL_No);
206 SvNV(&PL_sv_no);
207 SvREADONLY_on(&PL_sv_no);
208 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 209
3280af22
NIS
210 sv_setpv(&PL_sv_yes,PL_Yes);
211 SvNV(&PL_sv_yes);
212 SvREADONLY_on(&PL_sv_yes);
213 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 214 }
79072805 215
76e3520e
GS
216#ifdef PERL_OBJECT
217 /* TODO: */
6b88bc9c 218 /* PL_sighandlerp = sighandler; */
76e3520e 219#else
cea2e8a9 220 PL_sighandlerp = Perl_sighandler;
76e3520e 221#endif
3280af22 222 PL_pidstatus = newHV();
44a8e56a 223
79072805
LW
224#ifdef MSDOS
225 /*
226 * There is no way we can refer to them from Perl so close them to save
227 * space. The other alternative would be to provide STDAUX and STDPRN
228 * filehandles.
229 */
230 (void)fclose(stdaux);
231 (void)fclose(stdprn);
232#endif
233 }
234
79cb57f6 235 PL_nrs = newSVpvn("\n", 1);
3280af22 236 PL_rs = SvREFCNT_inc(PL_nrs);
dc92893f 237
cea2e8a9 238 init_stacks();
79072805 239
748a9306 240 init_ids();
3280af22 241 PL_lex_state = LEX_NOTPARSING;
a5f75d66 242
312caa8e 243 JMPENV_BOOTSTRAP;
f86702cc
PP
244 STATUS_ALL_SUCCESS;
245
0672f40e 246 init_i18nl10n(1);
36477c24 247 SET_NUMERIC_STANDARD();
0b5b802d 248
a7cb1f99
GS
249 {
250 U8 *s;
251 PL_patchlevel = NEWSV(0,4);
155aba94 252 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 253 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 254 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 255 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS
256 /* Build version strings using "native" characters */
257 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
258 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
259 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS
260 *s = '\0';
261 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
262 SvPOK_on(PL_patchlevel);
263 SvNVX(PL_patchlevel) = (NV)PERL_REVISION
264 + ((NV)PERL_VERSION / (NV)1000)
cceca5ed 265#if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0
a7cb1f99 266 + ((NV)PERL_SUBVERSION / (NV)1000000)
a5f75d66 267#endif
a7cb1f99
GS
268 ;
269 SvNOK_on(PL_patchlevel); /* dual valued */
270 SvUTF8_on(PL_patchlevel);
271 SvREADONLY_on(PL_patchlevel);
272 }
79072805 273
ab821d7f 274#if defined(LOCAL_PATCH_COUNT)
3280af22 275 PL_localpatches = local_patches; /* For possible -v */
ab821d7f
PP
276#endif
277
52853b95
GS
278#ifdef HAVE_INTERP_INTERN
279 sys_intern_init();
280#endif
281
4b556e6c 282 PerlIO_init(); /* Hook to IO system */
760ac839 283
3280af22
NIS
284 PL_fdpid = newAV(); /* for remembering popen pids by fd */
285 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 286 PL_errors = newSVpvn("",0);
8990e307 287
8990e307 288 ENTER;
79072805
LW
289}
290
954c1994
GS
291/*
292=for apidoc perl_destruct
293
294Shuts down a Perl interpreter. See L<perlembed>.
295
296=cut
297*/
298
79072805 299void
0cb96387 300perl_destruct(pTHXx)
79072805 301{
748a9306 302 int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 303 HV *hv;
1f2bfc8a 304#ifdef USE_THREADS
33f46ff6 305 Thread t;
cea2e8a9 306 dTHX;
1f2bfc8a 307#endif /* USE_THREADS */
8990e307 308
7766f137
GS
309 /* wait for all pseudo-forked children to finish */
310 PERL_WAIT_FOR_CHILDREN;
311
11343788 312#ifdef USE_THREADS
0f15f207 313#ifndef FAKE_THREADS
8023c3ce
MB
314 /* Pass 1 on any remaining threads: detach joinables, join zombies */
315 retry_cleanup:
533c011a 316 MUTEX_LOCK(&PL_threads_mutex);
bf49b057 317 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 318 "perl_destruct: waiting for %d threads...\n",
533c011a 319 PL_nthreads - 1));
33f46ff6 320 for (t = thr->next; t != thr; t = t->next) {
605e5515
MB
321 MUTEX_LOCK(&t->mutex);
322 switch (ThrSTATE(t)) {
323 AV *av;
c7848ba1 324 case THRf_ZOMBIE:
bf49b057 325 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 326 "perl_destruct: joining zombie %p\n", t));
605e5515
MB
327 ThrSETSTATE(t, THRf_DEAD);
328 MUTEX_UNLOCK(&t->mutex);
533c011a 329 PL_nthreads--;
8023c3ce
MB
330 /*
331 * The SvREFCNT_dec below may take a long time (e.g. av
332 * may contain an object scalar whose destructor gets
333 * called) so we have to unlock threads_mutex and start
334 * all over again.
335 */
533c011a 336 MUTEX_UNLOCK(&PL_threads_mutex);
ea0efc06 337 JOIN(t, &av);
605e5515 338 SvREFCNT_dec((SV*)av);
bf49b057 339 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 340 "perl_destruct: joined zombie %p OK\n", t));
8023c3ce 341 goto retry_cleanup;
c7848ba1 342 case THRf_R_JOINABLE:
bf49b057 343 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
344 "perl_destruct: detaching thread %p\n", t));
345 ThrSETSTATE(t, THRf_R_DETACHED);
ac27b0f5 346 /*
c7848ba1
MB
347 * We unlock threads_mutex and t->mutex in the opposite order
348 * from which we locked them just so that DETACH won't
349 * deadlock if it panics. It's only a breach of good style
350 * not a bug since they are unlocks not locks.
351 */
533c011a 352 MUTEX_UNLOCK(&PL_threads_mutex);
c7848ba1
MB
353 DETACH(t);
354 MUTEX_UNLOCK(&t->mutex);
8023c3ce 355 goto retry_cleanup;
c7848ba1 356 default:
bf49b057 357 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1
MB
358 "perl_destruct: ignoring %p (state %u)\n",
359 t, ThrSTATE(t)));
360 MUTEX_UNLOCK(&t->mutex);
c7848ba1 361 /* fall through and out */
33f46ff6
MB
362 }
363 }
8023c3ce
MB
364 /* We leave the above "Pass 1" loop with threads_mutex still locked */
365
366 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
533c011a 367 while (PL_nthreads > 1)
11343788 368 {
bf49b057 369 DEBUG_S(PerlIO_printf(Perl_debug_log,
c7848ba1 370 "perl_destruct: final wait for %d threads\n",
533c011a
NIS
371 PL_nthreads - 1));
372 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
11343788
MB
373 }
374 /* At this point, we're the last thread */
533c011a 375 MUTEX_UNLOCK(&PL_threads_mutex);
bf49b057 376 DEBUG_S(PerlIO_printf(Perl_debug_log, "perl_destruct: armageddon has arrived\n"));
533c011a
NIS
377 MUTEX_DESTROY(&PL_threads_mutex);
378 COND_DESTROY(&PL_nthreads_cond);
b57a092c 379 PL_nthreads--;
0f15f207 380#endif /* !defined(FAKE_THREADS) */
11343788
MB
381#endif /* USE_THREADS */
382
3280af22 383 destruct_level = PL_perl_destruct_level;
4633a7c4
LW
384#ifdef DEBUGGING
385 {
386 char *s;
155aba94 387 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc
PP
388 int i = atoi(s);
389 if (destruct_level < i)
390 destruct_level = i;
391 }
4633a7c4
LW
392 }
393#endif
394
8990e307 395 LEAVE;
a0d0e21e
LW
396 FREETMPS;
397
13621cfb 398
ff0cee69
PP
399 /* We must account for everything. */
400
401 /* Destroy the main CV and syntax tree */
3280af22
NIS
402 if (PL_main_root) {
403 PL_curpad = AvARRAY(PL_comppad);
404 op_free(PL_main_root);
405 PL_main_root = Nullop;
a0d0e21e 406 }
3280af22
NIS
407 PL_curcop = &PL_compiling;
408 PL_main_start = Nullop;
409 SvREFCNT_dec(PL_main_cv);
410 PL_main_cv = Nullcv;
24d3c518 411 PL_dirty = TRUE;
ff0cee69 412
13621cfb
NIS
413 /* Tell PerlIO we are about to tear things apart in case
414 we have layers which are using resources that should
415 be cleaned up now.
416 */
417
418 PerlIO_destruct(aTHX);
419
3280af22 420 if (PL_sv_objcount) {
a0d0e21e
LW
421 /*
422 * Try to destruct global references. We do this first so that the
423 * destructors and destructees still exist. Some sv's might remain.
424 * Non-referenced objects are on their own.
425 */
a0d0e21e 426 sv_clean_objs();
8990e307
LW
427 }
428
5cd24f17 429 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
430 SvREFCNT_dec(PL_warnhook);
431 PL_warnhook = Nullsv;
432 SvREFCNT_dec(PL_diehook);
433 PL_diehook = Nullsv;
5cd24f17 434
4b556e6c 435 /* call exit list functions */
3280af22 436 while (PL_exitlistlen-- > 0)
0cb96387 437 PL_exitlist[PL_exitlistlen].fn(aTHXo_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 438
3280af22 439 Safefree(PL_exitlist);
4b556e6c 440
a0d0e21e 441 if (destruct_level == 0){
8990e307 442
a0d0e21e 443 DEBUG_P(debprofdump());
ac27b0f5 444
a0d0e21e
LW
445 /* The exit() function will do everything that needs doing. */
446 return;
447 }
5dd60ef7 448
551a8b83
JH
449 /* jettison our possibly duplicated environment */
450
451#ifdef USE_ENVIRON_ARRAY
452 if (environ != PL_origenviron) {
453 I32 i;
454
455 for (i = 0; environ[i]; i++)
4b420006
JH
456 safesysfree(environ[i]);
457 /* Must use safesysfree() when working with environ. */
458 safesysfree(environ);
551a8b83
JH
459
460 environ = PL_origenviron;
461 }
462#endif
463
5f05dabc
PP
464 /* loosen bonds of global variables */
465
3280af22
NIS
466 if(PL_rsfp) {
467 (void)PerlIO_close(PL_rsfp);
468 PL_rsfp = Nullfp;
8ebc5c01
PP
469 }
470
471 /* Filters for program text */
3280af22
NIS
472 SvREFCNT_dec(PL_rsfp_filters);
473 PL_rsfp_filters = Nullav;
8ebc5c01
PP
474
475 /* switches */
3280af22
NIS
476 PL_preprocess = FALSE;
477 PL_minus_n = FALSE;
478 PL_minus_p = FALSE;
479 PL_minus_l = FALSE;
480 PL_minus_a = FALSE;
481 PL_minus_F = FALSE;
482 PL_doswitches = FALSE;
599cee73 483 PL_dowarn = G_WARN_OFF;
3280af22
NIS
484 PL_doextract = FALSE;
485 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
486 PL_unsafe = FALSE;
487
488 Safefree(PL_inplace);
489 PL_inplace = Nullch;
a7cb1f99 490 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
491
492 if (PL_e_script) {
493 SvREFCNT_dec(PL_e_script);
494 PL_e_script = Nullsv;
8ebc5c01
PP
495 }
496
497 /* magical thingies */
498
7889fe52
NIS
499 SvREFCNT_dec(PL_ofs_sv); /* $, */
500 PL_ofs_sv = Nullsv;
5f05dabc 501
7889fe52
NIS
502 SvREFCNT_dec(PL_ors_sv); /* $\ */
503 PL_ors_sv = Nullsv;
8ebc5c01 504
3280af22
NIS
505 SvREFCNT_dec(PL_rs); /* $/ */
506 PL_rs = Nullsv;
dc92893f 507
3280af22
NIS
508 SvREFCNT_dec(PL_nrs); /* $/ helper */
509 PL_nrs = Nullsv;
5f05dabc 510
d33b2eba
GS
511 PL_multiline = 0; /* $* */
512 Safefree(PL_osname); /* $^O */
513 PL_osname = Nullch;
5f05dabc 514
3280af22
NIS
515 SvREFCNT_dec(PL_statname);
516 PL_statname = Nullsv;
517 PL_statgv = Nullgv;
5f05dabc 518
8ebc5c01
PP
519 /* defgv, aka *_ should be taken care of elsewhere */
520
8ebc5c01 521 /* clean up after study() */
3280af22
NIS
522 SvREFCNT_dec(PL_lastscream);
523 PL_lastscream = Nullsv;
524 Safefree(PL_screamfirst);
525 PL_screamfirst = 0;
526 Safefree(PL_screamnext);
527 PL_screamnext = 0;
8ebc5c01 528
7d5ea4e7
GS
529 /* float buffer */
530 Safefree(PL_efloatbuf);
531 PL_efloatbuf = Nullch;
532 PL_efloatsize = 0;
533
8ebc5c01 534 /* startup and shutdown function lists */
3280af22
NIS
535 SvREFCNT_dec(PL_beginav);
536 SvREFCNT_dec(PL_endav);
7d30b5c4 537 SvREFCNT_dec(PL_checkav);
3280af22
NIS
538 SvREFCNT_dec(PL_initav);
539 PL_beginav = Nullav;
540 PL_endav = Nullav;
7d30b5c4 541 PL_checkav = Nullav;
3280af22 542 PL_initav = Nullav;
5618dfe8 543
8ebc5c01 544 /* shortcuts just get cleared */
3280af22 545 PL_envgv = Nullgv;
3280af22
NIS
546 PL_incgv = Nullgv;
547 PL_hintgv = Nullgv;
548 PL_errgv = Nullgv;
549 PL_argvgv = Nullgv;
550 PL_argvoutgv = Nullgv;
551 PL_stdingv = Nullgv;
bf49b057 552 PL_stderrgv = Nullgv;
3280af22
NIS
553 PL_last_in_gv = Nullgv;
554 PL_replgv = Nullgv;
5c831c24 555 PL_debstash = Nullhv;
8ebc5c01
PP
556
557 /* reset so print() ends up where we expect */
558 setdefout(Nullgv);
5c831c24 559
7a1c5554
GS
560 SvREFCNT_dec(PL_argvout_stack);
561 PL_argvout_stack = Nullav;
8ebc5c01 562
5c831c24
GS
563 SvREFCNT_dec(PL_modglobal);
564 PL_modglobal = Nullhv;
565 SvREFCNT_dec(PL_preambleav);
566 PL_preambleav = Nullav;
567 SvREFCNT_dec(PL_subname);
568 PL_subname = Nullsv;
569 SvREFCNT_dec(PL_linestr);
570 PL_linestr = Nullsv;
571 SvREFCNT_dec(PL_pidstatus);
572 PL_pidstatus = Nullhv;
573 SvREFCNT_dec(PL_toptarget);
574 PL_toptarget = Nullsv;
575 SvREFCNT_dec(PL_bodytarget);
576 PL_bodytarget = Nullsv;
577 PL_formtarget = Nullsv;
578
d33b2eba 579 /* free locale stuff */
b9582b6a 580#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
581 Safefree(PL_collation_name);
582 PL_collation_name = Nullch;
b9582b6a 583#endif
d33b2eba 584
b9582b6a 585#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
586 Safefree(PL_numeric_name);
587 PL_numeric_name = Nullch;
a453c169 588 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 589#endif
d33b2eba 590
5c831c24
GS
591 /* clear utf8 character classes */
592 SvREFCNT_dec(PL_utf8_alnum);
593 SvREFCNT_dec(PL_utf8_alnumc);
594 SvREFCNT_dec(PL_utf8_ascii);
595 SvREFCNT_dec(PL_utf8_alpha);
596 SvREFCNT_dec(PL_utf8_space);
597 SvREFCNT_dec(PL_utf8_cntrl);
598 SvREFCNT_dec(PL_utf8_graph);
599 SvREFCNT_dec(PL_utf8_digit);
600 SvREFCNT_dec(PL_utf8_upper);
601 SvREFCNT_dec(PL_utf8_lower);
602 SvREFCNT_dec(PL_utf8_print);
603 SvREFCNT_dec(PL_utf8_punct);
604 SvREFCNT_dec(PL_utf8_xdigit);
605 SvREFCNT_dec(PL_utf8_mark);
606 SvREFCNT_dec(PL_utf8_toupper);
607 SvREFCNT_dec(PL_utf8_tolower);
608 PL_utf8_alnum = Nullsv;
609 PL_utf8_alnumc = Nullsv;
610 PL_utf8_ascii = Nullsv;
611 PL_utf8_alpha = Nullsv;
612 PL_utf8_space = Nullsv;
613 PL_utf8_cntrl = Nullsv;
614 PL_utf8_graph = Nullsv;
615 PL_utf8_digit = Nullsv;
616 PL_utf8_upper = Nullsv;
617 PL_utf8_lower = Nullsv;
618 PL_utf8_print = Nullsv;
619 PL_utf8_punct = Nullsv;
620 PL_utf8_xdigit = Nullsv;
621 PL_utf8_mark = Nullsv;
622 PL_utf8_toupper = Nullsv;
623 PL_utf8_totitle = Nullsv;
624 PL_utf8_tolower = Nullsv;
625
971a9dd3
GS
626 if (!specialWARN(PL_compiling.cop_warnings))
627 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 628 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
629 if (!specialCopIO(PL_compiling.cop_io))
630 SvREFCNT_dec(PL_compiling.cop_io);
631 PL_compiling.cop_io = Nullsv;
f4dd75d9
GS
632#ifdef USE_ITHREADS
633 Safefree(CopFILE(&PL_compiling));
634 CopFILE(&PL_compiling) = Nullch;
635 Safefree(CopSTASHPV(&PL_compiling));
636#else
01724ea0 637 SvREFCNT_dec(CopFILEGV(&PL_compiling));
f4dd75d9
GS
638 CopFILEGV(&PL_compiling) = Nullgv;
639 /* cop_stash is not refcounted */
01724ea0 640#endif
5c831c24 641
a0d0e21e 642 /* Prepare to destruct main symbol table. */
5f05dabc 643
3280af22
NIS
644 hv = PL_defstash;
645 PL_defstash = 0;
a0d0e21e 646 SvREFCNT_dec(hv);
5c831c24
GS
647 SvREFCNT_dec(PL_curstname);
648 PL_curstname = Nullsv;
a0d0e21e 649
5a844595
GS
650 /* clear queued errors */
651 SvREFCNT_dec(PL_errors);
652 PL_errors = Nullsv;
653
a0d0e21e 654 FREETMPS;
0453d815 655 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 656 if (PL_scopestack_ix != 0)
0453d815
PM
657 Perl_warner(aTHX_ WARN_INTERNAL,
658 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
659 (long)PL_scopestack_ix);
660 if (PL_savestack_ix != 0)
0453d815
PM
661 Perl_warner(aTHX_ WARN_INTERNAL,
662 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
663 (long)PL_savestack_ix);
664 if (PL_tmps_floor != -1)
0453d815 665 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 666 (long)PL_tmps_floor + 1);
a0d0e21e 667 if (cxstack_ix != -1)
0453d815 668 Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 669 (long)cxstack_ix + 1);
a0d0e21e 670 }
8990e307
LW
671
672 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 673 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 674 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
675
676 /* the 2 is for PL_fdpid and PL_strtab */
677 while (PL_sv_count > 2 && sv_clean_all())
678 ;
679
d33b2eba
GS
680 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
681 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
682 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
683 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 684
d4777f27
GS
685 AvREAL_off(PL_fdpid); /* no surviving entries */
686 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
687 PL_fdpid = Nullav;
688
6c644e78
GS
689#ifdef HAVE_INTERP_INTERN
690 sys_intern_clear();
691#endif
692
6e72f9df
PP
693 /* Destruct the global string table. */
694 {
695 /* Yell and reset the HeVAL() slots that are still holding refcounts,
696 * so that sv_free() won't fail on them.
697 */
698 I32 riter;
699 I32 max;
700 HE *hent;
701 HE **array;
702
703 riter = 0;
3280af22
NIS
704 max = HvMAX(PL_strtab);
705 array = HvARRAY(PL_strtab);
6e72f9df
PP
706 hent = array[0];
707 for (;;) {
0453d815
PM
708 if (hent && ckWARN_d(WARN_INTERNAL)) {
709 Perl_warner(aTHX_ WARN_INTERNAL,
710 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
711 HeVAL(hent) - Nullsv, HeKEY(hent));
712 HeVAL(hent) = Nullsv;
713 hent = HeNEXT(hent);
714 }
715 if (!hent) {
716 if (++riter > max)
717 break;
718 hent = array[riter];
719 }
720 }
721 }
3280af22 722 SvREFCNT_dec(PL_strtab);
6e72f9df 723
e652bb2f 724#ifdef USE_ITHREADS
a0739874
DM
725 /* free the pointer table used for cloning */
726 ptr_table_free(PL_ptr_table);
53186e96 727#endif
a0739874 728
d33b2eba
GS
729 /* free special SVs */
730
731 SvREFCNT(&PL_sv_yes) = 0;
732 sv_clear(&PL_sv_yes);
733 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 734 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
735
736 SvREFCNT(&PL_sv_no) = 0;
737 sv_clear(&PL_sv_no);
738 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 739 SvFLAGS(&PL_sv_no) = 0;
01724ea0
GS
740
741 SvREFCNT(&PL_sv_undef) = 0;
742 SvREADONLY_off(&PL_sv_undef);
d33b2eba 743
0453d815
PM
744 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
745 Perl_warner(aTHX_ WARN_INTERNAL,"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 746
3280af22 747 Safefree(PL_origfilename);
3280af22 748 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ
749 if (PL_reg_curpm)
750 Safefree(PL_reg_curpm);
82ba1be6 751 Safefree(PL_reg_poscache);
3280af22
NIS
752 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
753 Safefree(PL_op_mask);
cf36064f
GS
754 Safefree(PL_psig_ptr);
755 Safefree(PL_psig_name);
2c2666fc 756 Safefree(PL_bitcount);
ce08f86c 757 Safefree(PL_psig_pend);
6e72f9df 758 nuke_stacks();
3280af22 759 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 760
a0d0e21e 761 DEBUG_P(debprofdump());
11343788 762#ifdef USE_THREADS
5f08fbcd 763 MUTEX_DESTROY(&PL_strtab_mutex);
533c011a
NIS
764 MUTEX_DESTROY(&PL_sv_mutex);
765 MUTEX_DESTROY(&PL_eval_mutex);
5ff3f7a4 766 MUTEX_DESTROY(&PL_cred_mutex);
3d35f11b 767 MUTEX_DESTROY(&PL_fdpid_mutex);
533c011a 768 COND_DESTROY(&PL_eval_cond);
11d617a5
GS
769#ifdef EMULATE_ATOMIC_REFCOUNTS
770 MUTEX_DESTROY(&PL_svref_mutex);
771#endif /* EMULATE_ATOMIC_REFCOUNTS */
fc36a67e 772
8023c3ce 773 /* As the penultimate thing, free the non-arena SV for thrsv */
533c011a
NIS
774 Safefree(SvPVX(PL_thrsv));
775 Safefree(SvANY(PL_thrsv));
776 Safefree(PL_thrsv);
777 PL_thrsv = Nullsv;
8023c3ce 778#endif /* USE_THREADS */
d33b2eba 779
612f20c3
GS
780 sv_free_arenas();
781
fc36a67e
PP
782 /* As the absolutely last thing, free the non-arena SV for mess() */
783
3280af22 784 if (PL_mess_sv) {
9c63abab
GS
785 /* it could have accumulated taint magic */
786 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
787 MAGIC* mg;
788 MAGIC* moremagic;
789 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
790 moremagic = mg->mg_moremagic;
791 if (mg->mg_ptr && mg->mg_type != 'g' && mg->mg_len >= 0)
792 Safefree(mg->mg_ptr);
793 Safefree(mg);
794 }
795 }
fc36a67e 796 /* we know that type >= SVt_PV */
155aba94 797 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS
798 Safefree(SvPVX(PL_mess_sv));
799 Safefree(SvANY(PL_mess_sv));
800 Safefree(PL_mess_sv);
801 PL_mess_sv = Nullsv;
fc36a67e 802 }
79072805
LW
803}
804
954c1994
GS
805/*
806=for apidoc perl_free
807
808Releases a Perl interpreter. See L<perlembed>.
809
810=cut
811*/
812
79072805 813void
0cb96387 814perl_free(pTHXx)
79072805 815{
c5be433b 816#if defined(PERL_OBJECT)
7f0d82f7 817 PerlMem_free(this);
76e3520e 818#else
ce3e5b80
NIS
819# if defined(WIN32)
820# if defined(PERL_IMPLICIT_SYS)
1c0ca838 821 void *host = w32_internal_host;
ba247512 822 if (PerlProc_lasthost()) {
ce08f86c 823 PerlIO_cleanup();
ba247512 824 }
7f0d82f7 825 PerlMem_free(aTHXx);
1c0ca838 826 win32_delete_internal_host(host);
ce3e5b80 827#else
ce08f86c 828 PerlIO_cleanup();
ce3e5b80
NIS
829 PerlMem_free(aTHXx);
830#endif
1c0ca838
GS
831# else
832 PerlMem_free(aTHXx);
833# endif
76e3520e 834#endif
79072805
LW
835}
836
4b556e6c 837void
864dbfa3 838Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 839{
3280af22
NIS
840 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
841 PL_exitlist[PL_exitlistlen].fn = fn;
842 PL_exitlist[PL_exitlistlen].ptr = ptr;
843 ++PL_exitlistlen;
4b556e6c
JD
844}
845
954c1994
GS
846/*
847=for apidoc perl_parse
848
849Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
850
851=cut
852*/
853
79072805 854int
0cb96387 855perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 856{
6224f72b 857 I32 oldscope;
6224f72b 858 int ret;
db36c5a1 859 dJMPENV;
cea2e8a9
GS
860#ifdef USE_THREADS
861 dTHX;
862#endif
8d063cd8 863
a687059c
LW
864#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
865#ifdef IAMSUID
866#undef IAMSUID
cea2e8a9 867 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW
868setuid perl scripts securely.\n");
869#endif
870#endif
871
8f1f23e8 872#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
6e72f9df
PP
873 _dyld_lookup_and_bind
874 ("__environ", (unsigned long *) &environ_pointer, NULL);
875#endif /* environ */
876
3280af22
NIS
877 PL_origargv = argv;
878 PL_origargc = argc;
fa6a1c44 879#ifdef USE_ENVIRON_ARRAY
3280af22 880 PL_origenviron = environ;
a0d0e21e
LW
881#endif
882
3280af22 883 if (PL_do_undump) {
a0d0e21e
LW
884
885 /* Come here if running an undumped a.out. */
886
3280af22
NIS
887 PL_origfilename = savepv(argv[0]);
888 PL_do_undump = FALSE;
a0d0e21e 889 cxstack_ix = -1; /* start label stack again */
748a9306 890 init_ids();
a0d0e21e
LW
891 init_postdump_symbols(argc,argv,env);
892 return 0;
893 }
894
3280af22
NIS
895 if (PL_main_root) {
896 PL_curpad = AvARRAY(PL_comppad);
897 op_free(PL_main_root);
898 PL_main_root = Nullop;
ff0cee69 899 }
3280af22
NIS
900 PL_main_start = Nullop;
901 SvREFCNT_dec(PL_main_cv);
902 PL_main_cv = Nullcv;
79072805 903
3280af22
NIS
904 time(&PL_basetime);
905 oldscope = PL_scopestack_ix;
599cee73 906 PL_dowarn = G_WARN_OFF;
f86702cc 907
14dd3ad8
GS
908#ifdef PERL_FLEXIBLE_EXCEPTIONS
909 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
910#else
911 JMPENV_PUSH(ret);
912#endif
6224f72b 913 switch (ret) {
312caa8e 914 case 0:
14dd3ad8
GS
915#ifndef PERL_FLEXIBLE_EXCEPTIONS
916 parse_body(env,xsinit);
917#endif
7d30b5c4
GS
918 if (PL_checkav)
919 call_list(oldscope, PL_checkav);
14dd3ad8
GS
920 ret = 0;
921 break;
6224f72b
GS
922 case 1:
923 STATUS_ALL_FAILURE;
924 /* FALL THROUGH */
925 case 2:
926 /* my_exit() was called */
3280af22 927 while (PL_scopestack_ix > oldscope)
6224f72b
GS
928 LEAVE;
929 FREETMPS;
3280af22 930 PL_curstash = PL_defstash;
7d30b5c4
GS
931 if (PL_checkav)
932 call_list(oldscope, PL_checkav);
14dd3ad8
GS
933 ret = STATUS_NATIVE_EXPORT;
934 break;
6224f72b 935 case 3:
bf49b057 936 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
937 ret = 1;
938 break;
6224f72b 939 }
14dd3ad8
GS
940 JMPENV_POP;
941 return ret;
942}
943
944#ifdef PERL_FLEXIBLE_EXCEPTIONS
945STATIC void *
946S_vparse_body(pTHX_ va_list args)
947{
948 char **env = va_arg(args, char**);
949 XSINIT_t xsinit = va_arg(args, XSINIT_t);
950
951 return parse_body(env, xsinit);
312caa8e 952}
14dd3ad8 953#endif
312caa8e
CS
954
955STATIC void *
14dd3ad8 956S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 957{
312caa8e
CS
958 int argc = PL_origargc;
959 char **argv = PL_origargv;
312caa8e
CS
960 char *scriptname = NULL;
961 int fdscript = -1;
962 VOL bool dosearch = FALSE;
963 char *validarg = "";
964 AV* comppadlist;
965 register SV *sv;
966 register char *s;
f4c556ac 967 char *cddir = Nullch;
312caa8e 968
3280af22 969 sv_setpvn(PL_linestr,"",0);
79cb57f6 970 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
971 SAVEFREESV(sv);
972 init_main_stash();
54310121 973
6224f72b
GS
974 for (argc--,argv++; argc > 0; argc--,argv++) {
975 if (argv[0][0] != '-' || !argv[0][1])
976 break;
977#ifdef DOSUID
978 if (*validarg)
979 validarg = " PHOOEY ";
980 else
981 validarg = argv[0];
13281fa4 982#endif
6224f72b
GS
983 s = argv[0]+1;
984 reswitch:
985 switch (*s) {
729a02f2
GS
986 case 'C':
987#ifdef WIN32
c0932edc 988 win32_argv2utf8(argc-1, argv+1);
729a02f2
GS
989 /* FALL THROUGH */
990#endif
1d5472a9
GS
991#ifndef PERL_STRICT_CR
992 case '\r':
993#endif
6224f72b
GS
994 case ' ':
995 case '0':
996 case 'F':
997 case 'a':
998 case 'c':
999 case 'd':
1000 case 'D':
1001 case 'h':
1002 case 'i':
1003 case 'l':
1004 case 'M':
1005 case 'm':
1006 case 'n':
1007 case 'p':
1008 case 's':
1009 case 'u':
1010 case 'U':
1011 case 'v':
599cee73
PM
1012 case 'W':
1013 case 'X':
6224f72b 1014 case 'w':
155aba94 1015 if ((s = moreswitches(s)))
6224f72b
GS
1016 goto reswitch;
1017 break;
33b78306 1018
6224f72b 1019 case 'T':
3280af22 1020 PL_tainting = TRUE;
6224f72b
GS
1021 s++;
1022 goto reswitch;
f86702cc 1023
6224f72b 1024 case 'e':
bf4acbe4
GS
1025#ifdef MACOS_TRADITIONAL
1026 /* ignore -e for Dev:Pseudo argument */
1027 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
ac27b0f5 1028 break;
bf4acbe4 1029#endif
3280af22 1030 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1031 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1032 if (!PL_e_script) {
79cb57f6 1033 PL_e_script = newSVpvn("",0);
0cb96387 1034 filter_add(read_e_script, NULL);
6224f72b
GS
1035 }
1036 if (*++s)
3280af22 1037 sv_catpv(PL_e_script, s);
6224f72b 1038 else if (argv[1]) {
3280af22 1039 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1040 argc--,argv++;
1041 }
1042 else
cea2e8a9 1043 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1044 sv_catpv(PL_e_script, "\n");
6224f72b 1045 break;
afe37c7d 1046
6224f72b
GS
1047 case 'I': /* -I handled both here and in moreswitches() */
1048 forbid_setid("-I");
1049 if (!*++s && (s=argv[1]) != Nullch) {
1050 argc--,argv++;
1051 }
6224f72b 1052 if (s && *s) {
0df16ed7
GS
1053 char *p;
1054 STRLEN len = strlen(s);
1055 p = savepvn(s, len);
9c8a64f0 1056 incpush(p, TRUE, TRUE);
0df16ed7
GS
1057 sv_catpvn(sv, "-I", 2);
1058 sv_catpvn(sv, p, len);
1059 sv_catpvn(sv, " ", 1);
6224f72b 1060 Safefree(p);
0df16ed7
GS
1061 }
1062 else
a67e862a 1063 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1064 break;
1065 case 'P':
1066 forbid_setid("-P");
3280af22 1067 PL_preprocess = TRUE;
6224f72b
GS
1068 s++;
1069 goto reswitch;
1070 case 'S':
1071 forbid_setid("-S");
1072 dosearch = TRUE;
1073 s++;
1074 goto reswitch;
1075 case 'V':
3280af22
NIS
1076 if (!PL_preambleav)
1077 PL_preambleav = newAV();
1078 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1079 if (*++s != ':') {
3280af22 1080 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1081#ifdef VMS
6b88bc9c 1082 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1083#else
3280af22 1084 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1085#endif
3280af22 1086 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1087# ifdef DEBUGGING
3280af22 1088 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1089# endif
6224f72b 1090# ifdef MULTIPLICITY
8f872242 1091 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1092# endif
b363f7ed
GS
1093# ifdef USE_THREADS
1094 sv_catpv(PL_Sv," USE_THREADS");
1095# endif
ac5e8965
JH
1096# ifdef USE_ITHREADS
1097 sv_catpv(PL_Sv," USE_ITHREADS");
1098# endif
10cc9d2a
JH
1099# ifdef USE_64_BIT_INT
1100 sv_catpv(PL_Sv," USE_64_BIT_INT");
1101# endif
1102# ifdef USE_64_BIT_ALL
1103 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1104# endif
1105# ifdef USE_LONG_DOUBLE
1106 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1107# endif
53430762
JH
1108# ifdef USE_LARGE_FILES
1109 sv_catpv(PL_Sv," USE_LARGE_FILES");
1110# endif
ac5e8965
JH
1111# ifdef USE_SOCKS
1112 sv_catpv(PL_Sv," USE_SOCKS");
1113# endif
b363f7ed
GS
1114# ifdef PERL_OBJECT
1115 sv_catpv(PL_Sv," PERL_OBJECT");
1116# endif
1117# ifdef PERL_IMPLICIT_CONTEXT
1118 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1119# endif
1120# ifdef PERL_IMPLICIT_SYS
1121 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1122# endif
3280af22 1123 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1124
6224f72b
GS
1125#if defined(LOCAL_PATCH_COUNT)
1126 if (LOCAL_PATCH_COUNT > 0) {
1127 int i;
3280af22 1128 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1129 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1130 if (PL_localpatches[i])
cea2e8a9 1131 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS
1132 }
1133 }
1134#endif
cea2e8a9 1135 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1136#ifdef __DATE__
1137# ifdef __TIME__
cea2e8a9 1138 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1139# else
cea2e8a9 1140 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1141# endif
1142#endif
3280af22 1143 sv_catpv(PL_Sv, "; \
6224f72b
GS
1144$\"=\"\\n \"; \
1145@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
1146print \" \\%ENV:\\n @env\\n\" if @env; \
1147print \" \\@INC:\\n @INC\\n\";");
1148 }
1149 else {
3280af22
NIS
1150 PL_Sv = newSVpv("config_vars(qw(",0);
1151 sv_catpv(PL_Sv, ++s);
1152 sv_catpv(PL_Sv, "))");
6224f72b
GS
1153 s += strlen(s);
1154 }
3280af22 1155 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1156 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1157 goto reswitch;
1158 case 'x':
3280af22 1159 PL_doextract = TRUE;
6224f72b
GS
1160 s++;
1161 if (*s)
f4c556ac 1162 cddir = s;
6224f72b
GS
1163 break;
1164 case 0:
1165 break;
1166 case '-':
1167 if (!*++s || isSPACE(*s)) {
1168 argc--,argv++;
1169 goto switch_end;
1170 }
1171 /* catch use of gnu style long options */
1172 if (strEQ(s, "version")) {
1173 s = "v";
1174 goto reswitch;
1175 }
1176 if (strEQ(s, "help")) {
1177 s = "h";
1178 goto reswitch;
1179 }
1180 s--;
1181 /* FALL THROUGH */
1182 default:
cea2e8a9 1183 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1184 }
1185 }
6224f72b 1186 switch_end:
54310121 1187
f675dbe5
CB
1188 if (
1189#ifndef SECURE_INTERNAL_GETENV
1190 !PL_tainting &&
1191#endif
0df16ed7
GS
1192 (s = PerlEnv_getenv("PERL5OPT")))
1193 {
74288ac8
GS
1194 while (isSPACE(*s))
1195 s++;
1196 if (*s == '-' && *(s+1) == 'T')
1197 PL_tainting = TRUE;
1198 else {
1199 while (s && *s) {
4ea8f8fb 1200 char *d;
74288ac8
GS
1201 while (isSPACE(*s))
1202 s++;
1203 if (*s == '-') {
1204 s++;
1205 if (isSPACE(*s))
1206 continue;
1207 }
4ea8f8fb 1208 d = s;
74288ac8
GS
1209 if (!*s)
1210 break;
1211 if (!strchr("DIMUdmw", *s))
cea2e8a9 1212 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1213 while (++s && *s) {
1214 if (isSPACE(*s)) {
1215 *s++ = '\0';
1216 break;
1217 }
1218 }
1219 moreswitches(d);
6224f72b 1220 }
6224f72b
GS
1221 }
1222 }
a0d0e21e 1223
6224f72b
GS
1224 if (!scriptname)
1225 scriptname = argv[0];
3280af22 1226 if (PL_e_script) {
6224f72b
GS
1227 argc++,argv--;
1228 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1229 }
1230 else if (scriptname == Nullch) {
1231#ifdef MSDOS
1232 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1233 moreswitches("h");
1234#endif
1235 scriptname = "-";
1236 }
1237
1238 init_perllib();
1239
1240 open_script(scriptname,dosearch,sv,&fdscript);
1241
1242 validate_suid(validarg, scriptname,fdscript);
1243
64ca3a65 1244#ifndef PERL_MICRO
0b5b802d
GS
1245#if defined(SIGCHLD) || defined(SIGCLD)
1246 {
1247#ifndef SIGCHLD
1248# define SIGCHLD SIGCLD
1249#endif
1250 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1251 if (sigstate == SIG_IGN) {
1252 if (ckWARN(WARN_SIGNAL))
1253 Perl_warner(aTHX_ WARN_SIGNAL,
1254 "Can't ignore signal CHLD, forcing to default");
1255 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1256 }
1257 }
1258#endif
64ca3a65 1259#endif
0b5b802d 1260
bf4acbe4
GS
1261#ifdef MACOS_TRADITIONAL
1262 if (PL_doextract || gMacPerl_AlwaysExtract) {
1263#else
f4c556ac 1264 if (PL_doextract) {
bf4acbe4 1265#endif
6224f72b 1266 find_beginning();
f4c556ac
GS
1267 if (cddir && PerlDir_chdir(cddir) < 0)
1268 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1269
1270 }
6224f72b 1271
3280af22
NIS
1272 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1273 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1274 CvUNIQUE_on(PL_compcv);
1275
1276 PL_comppad = newAV();
1277 av_push(PL_comppad, Nullsv);
1278 PL_curpad = AvARRAY(PL_comppad);
1279 PL_comppad_name = newAV();
1280 PL_comppad_name_fill = 0;
1281 PL_min_intro_pending = 0;
1282 PL_padix = 0;
6224f72b 1283#ifdef USE_THREADS
79cb57f6 1284 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
533c011a
NIS
1285 PL_curpad[0] = (SV*)newAV();
1286 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
1287 CvOWNER(PL_compcv) = 0;
1288 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1289 MUTEX_INIT(CvMUTEXP(PL_compcv));
6224f72b
GS
1290#endif /* USE_THREADS */
1291
1292 comppadlist = newAV();
1293 AvREAL_off(comppadlist);
3280af22
NIS
1294 av_store(comppadlist, 0, (SV*)PL_comppad_name);
1295 av_store(comppadlist, 1, (SV*)PL_comppad);
1296 CvPADLIST(PL_compcv) = comppadlist;
6224f72b
GS
1297
1298 boot_core_UNIVERSAL();
9a34ef1d 1299#ifndef PERL_MICRO
09bef843 1300 boot_core_xsutils();
9a34ef1d 1301#endif
6224f72b
GS
1302
1303 if (xsinit)
0cb96387 1304 (*xsinit)(aTHXo); /* in case linked C routines want magical variables */
64ca3a65 1305#ifndef PERL_MICRO
ed79a026 1306#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1307 init_os_extras();
6224f72b 1308#endif
64ca3a65 1309#endif
6224f72b 1310
29209bc5 1311#ifdef USE_SOCKS
1b9c9cf5
DH
1312# ifdef HAS_SOCKS5_INIT
1313 socks5_init(argv[0]);
1314# else
29209bc5 1315 SOCKSinit(argv[0]);
1b9c9cf5 1316# endif
ac27b0f5 1317#endif
29209bc5 1318
6224f72b
GS
1319 init_predump_symbols();
1320 /* init_postdump_symbols not currently designed to be called */
1321 /* more than once (ENV isn't cleared first, for example) */
1322 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1323 if (!PL_do_undump)
6224f72b
GS
1324 init_postdump_symbols(argc,argv,env);
1325
1326 init_lexer();
1327
1328 /* now parse the script */
1329
1330 SETERRNO(0,SS$_NORMAL);
3280af22 1331 PL_error_count = 0;
bf4acbe4
GS
1332#ifdef MACOS_TRADITIONAL
1333 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1334 if (PL_minus_c)
1335 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1336 else {
1337 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1338 MacPerl_MPWFileName(PL_origfilename));
1339 }
1340 }
1341#else
3280af22
NIS
1342 if (yyparse() || PL_error_count) {
1343 if (PL_minus_c)
cea2e8a9 1344 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1345 else {
cea2e8a9 1346 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1347 PL_origfilename);
6224f72b
GS
1348 }
1349 }
bf4acbe4 1350#endif
57843af0 1351 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1352 PL_curstash = PL_defstash;
1353 PL_preprocess = FALSE;
1354 if (PL_e_script) {
1355 SvREFCNT_dec(PL_e_script);
1356 PL_e_script = Nullsv;
6224f72b
GS
1357 }
1358
1359 /* now that script is parsed, we can modify record separator */
3280af22
NIS
1360 SvREFCNT_dec(PL_rs);
1361 PL_rs = SvREFCNT_inc(PL_nrs);
864dbfa3 1362 sv_setsv(get_sv("/", TRUE), PL_rs);
3280af22 1363 if (PL_do_undump)
6224f72b
GS
1364 my_unexec();
1365
57843af0
GS
1366 if (isWARN_ONCE) {
1367 SAVECOPFILE(PL_curcop);
1368 SAVECOPLINE(PL_curcop);
3280af22 1369 gv_check(PL_defstash);
57843af0 1370 }
6224f72b
GS
1371
1372 LEAVE;
1373 FREETMPS;
1374
1375#ifdef MYMALLOC
1376 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1377 dump_mstats("after compilation:");
1378#endif
1379
1380 ENTER;
3280af22 1381 PL_restartop = 0;
312caa8e 1382 return NULL;
6224f72b
GS
1383}
1384
954c1994
GS
1385/*
1386=for apidoc perl_run
1387
1388Tells a Perl interpreter to run. See L<perlembed>.
1389
1390=cut
1391*/
1392
6224f72b 1393int
0cb96387 1394perl_run(pTHXx)
6224f72b 1395{
6224f72b 1396 I32 oldscope;
14dd3ad8 1397 int ret = 0;
db36c5a1 1398 dJMPENV;
cea2e8a9
GS
1399#ifdef USE_THREADS
1400 dTHX;
1401#endif
6224f72b 1402
3280af22 1403 oldscope = PL_scopestack_ix;
6224f72b 1404
14dd3ad8 1405#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1406 redo_body:
14dd3ad8
GS
1407 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1408#else
1409 JMPENV_PUSH(ret);
1410#endif
6224f72b
GS
1411 switch (ret) {
1412 case 1:
1413 cxstack_ix = -1; /* start context stack again */
312caa8e 1414 goto redo_body;
14dd3ad8
GS
1415 case 0: /* normal completion */
1416#ifndef PERL_FLEXIBLE_EXCEPTIONS
1417 redo_body:
1418 run_body(oldscope);
1419#endif
1420 /* FALL THROUGH */
1421 case 2: /* my_exit() */
3280af22 1422 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1423 LEAVE;
1424 FREETMPS;
3280af22 1425 PL_curstash = PL_defstash;
865be832 1426 if (PL_endav && !PL_minus_c)
3280af22 1427 call_list(oldscope, PL_endav);
6224f72b
GS
1428#ifdef MYMALLOC
1429 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1430 dump_mstats("after execution: ");
1431#endif
14dd3ad8
GS
1432 ret = STATUS_NATIVE_EXPORT;
1433 break;
6224f72b 1434 case 3:
312caa8e
CS
1435 if (PL_restartop) {
1436 POPSTACK_TO(PL_mainstack);
1437 goto redo_body;
6224f72b 1438 }
bf49b057 1439 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1440 FREETMPS;
14dd3ad8
GS
1441 ret = 1;
1442 break;
6224f72b
GS
1443 }
1444
14dd3ad8
GS
1445 JMPENV_POP;
1446 return ret;
312caa8e
CS
1447}
1448
14dd3ad8 1449#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1450STATIC void *
14dd3ad8 1451S_vrun_body(pTHX_ va_list args)
312caa8e 1452{
312caa8e
CS
1453 I32 oldscope = va_arg(args, I32);
1454
14dd3ad8
GS
1455 return run_body(oldscope);
1456}
1457#endif
1458
1459
1460STATIC void *
1461S_run_body(pTHX_ I32 oldscope)
1462{
6224f72b 1463 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1464 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1465
3280af22 1466 if (!PL_restartop) {
6224f72b
GS
1467 DEBUG_x(dump_all());
1468 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1469 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1470 PTR2UV(thr)));
6224f72b 1471
3280af22 1472 if (PL_minus_c) {
bf4acbe4
GS
1473#ifdef MACOS_TRADITIONAL
1474 PerlIO_printf(Perl_error_log, "%s syntax OK\n", MacPerl_MPWFileName(PL_origfilename));
1475#else
bf49b057 1476 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1477#endif
6224f72b
GS
1478 my_exit(0);
1479 }
3280af22 1480 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1481 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1482 if (PL_initav)
1483 call_list(oldscope, PL_initav);
6224f72b
GS
1484 }
1485
1486 /* do it */
1487
3280af22 1488 if (PL_restartop) {
533c011a 1489 PL_op = PL_restartop;
3280af22 1490 PL_restartop = 0;
cea2e8a9 1491 CALLRUNOPS(aTHX);
6224f72b 1492 }
3280af22
NIS
1493 else if (PL_main_start) {
1494 CvDEPTH(PL_main_cv) = 1;
533c011a 1495 PL_op = PL_main_start;
cea2e8a9 1496 CALLRUNOPS(aTHX);
6224f72b
GS
1497 }
1498
f6b3007c
JH
1499 my_exit(0);
1500 /* NOTREACHED */
312caa8e 1501 return NULL;
6224f72b
GS
1502}
1503
954c1994
GS
1504/*
1505=for apidoc p||get_sv
1506
1507Returns the SV of the specified Perl scalar. If C<create> is set and the
1508Perl variable does not exist then it will be created. If C<create> is not
1509set and the variable does not exist then NULL is returned.
1510
1511=cut
1512*/
1513
6224f72b 1514SV*
864dbfa3 1515Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1516{
1517 GV *gv;
1518#ifdef USE_THREADS
1519 if (name[1] == '\0' && !isALPHA(name[0])) {
1520 PADOFFSET tmp = find_threadsv(name);
411caa50 1521 if (tmp != NOT_IN_PAD)
6224f72b 1522 return THREADSV(tmp);
6224f72b
GS
1523 }
1524#endif /* USE_THREADS */
1525 gv = gv_fetchpv(name, create, SVt_PV);
1526 if (gv)
1527 return GvSV(gv);
1528 return Nullsv;
1529}
1530
954c1994
GS
1531/*
1532=for apidoc p||get_av
1533
1534Returns the AV of the specified Perl array. If C<create> is set and the
1535Perl variable does not exist then it will be created. If C<create> is not
1536set and the variable does not exist then NULL is returned.
1537
1538=cut
1539*/
1540
6224f72b 1541AV*
864dbfa3 1542Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1543{
1544 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1545 if (create)
1546 return GvAVn(gv);
1547 if (gv)
1548 return GvAV(gv);
1549 return Nullav;
1550}
1551
954c1994
GS
1552/*
1553=for apidoc p||get_hv
1554
1555Returns the HV of the specified Perl hash. If C<create> is set and the
1556Perl variable does not exist then it will be created. If C<create> is not
1557set and the variable does not exist then NULL is returned.
1558
1559=cut
1560*/
1561
6224f72b 1562HV*
864dbfa3 1563Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1564{
a0d0e21e
LW
1565 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1566 if (create)
1567 return GvHVn(gv);
1568 if (gv)
1569 return GvHV(gv);
1570 return Nullhv;
1571}
1572
954c1994
GS
1573/*
1574=for apidoc p||get_cv
1575
1576Returns the CV of the specified Perl subroutine. If C<create> is set and
1577the Perl subroutine does not exist then it will be declared (which has the
1578same effect as saying C<sub name;>). If C<create> is not set and the
1579subroutine does not exist then NULL is returned.
1580
1581=cut
1582*/
1583
a0d0e21e 1584CV*
864dbfa3 1585Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
1586{
1587 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1588 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
1589 /* XXX this is probably not what they think they're getting.
1590 * It has the same effect as "sub name;", i.e. just a forward
1591 * declaration! */
8ebc5c01 1592 if (create && !GvCVu(gv))
774d564b 1593 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1594 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1595 Nullop,
a0d0e21e
LW
1596 Nullop);
1597 if (gv)
8ebc5c01 1598 return GvCVu(gv);
a0d0e21e
LW
1599 return Nullcv;
1600}
1601
79072805
LW
1602/* Be sure to refetch the stack pointer after calling these routines. */
1603
954c1994
GS
1604/*
1605=for apidoc p||call_argv
1606
1607Performs a callback to the specified Perl sub. See L<perlcall>.
1608
1609=cut
1610*/
1611
a0d0e21e 1612I32
864dbfa3 1613Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1614
8ac85365
NIS
1615 /* See G_* flags in cop.h */
1616 /* null terminated arg list */
8990e307 1617{
a0d0e21e 1618 dSP;
8990e307 1619
924508f0 1620 PUSHMARK(SP);
a0d0e21e 1621 if (argv) {
8990e307 1622 while (*argv) {
a0d0e21e 1623 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
1624 argv++;
1625 }
a0d0e21e 1626 PUTBACK;
8990e307 1627 }
864dbfa3 1628 return call_pv(sub_name, flags);
8990e307
LW
1629}
1630
954c1994
GS
1631/*
1632=for apidoc p||call_pv
1633
1634Performs a callback to the specified Perl sub. See L<perlcall>.
1635
1636=cut
1637*/
1638
a0d0e21e 1639I32
864dbfa3 1640Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
1641 /* name of the subroutine */
1642 /* See G_* flags in cop.h */
a0d0e21e 1643{
864dbfa3 1644 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
1645}
1646
954c1994
GS
1647/*
1648=for apidoc p||call_method
1649
1650Performs a callback to the specified Perl method. The blessed object must
1651be on the stack. See L<perlcall>.
1652
1653=cut
1654*/
1655
a0d0e21e 1656I32
864dbfa3 1657Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
1658 /* name of the subroutine */
1659 /* See G_* flags in cop.h */
a0d0e21e 1660{
968b3946 1661 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
1662}
1663
1664/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
1665/*
1666=for apidoc p||call_sv
1667
1668Performs a callback to the Perl sub whose name is in the SV. See
1669L<perlcall>.
1670
1671=cut
1672*/
1673
a0d0e21e 1674I32
864dbfa3 1675Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1676 /* See G_* flags in cop.h */
a0d0e21e 1677{
924508f0 1678 dSP;
a0d0e21e 1679 LOGOP myop; /* fake syntax tree node */
968b3946 1680 UNOP method_op;
aa689395 1681 I32 oldmark;
a0d0e21e 1682 I32 retval;
a0d0e21e 1683 I32 oldscope;
54310121 1684 bool oldcatch = CATCH_GET;
6224f72b 1685 int ret;
533c011a 1686 OP* oldop = PL_op;
db36c5a1 1687 dJMPENV;
1e422769 1688
a0d0e21e
LW
1689 if (flags & G_DISCARD) {
1690 ENTER;
1691 SAVETMPS;
1692 }
1693
aa689395 1694 Zero(&myop, 1, LOGOP);
54310121 1695 myop.op_next = Nullop;
f51d4af5 1696 if (!(flags & G_NOARGS))
aa689395 1697 myop.op_flags |= OPf_STACKED;
54310121
PP
1698 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1699 (flags & G_ARRAY) ? OPf_WANT_LIST :
1700 OPf_WANT_SCALAR);
462e5cf6 1701 SAVEOP();
533c011a 1702 PL_op = (OP*)&myop;
aa689395 1703
3280af22
NIS
1704 EXTEND(PL_stack_sp, 1);
1705 *++PL_stack_sp = sv;
aa689395 1706 oldmark = TOPMARK;
3280af22 1707 oldscope = PL_scopestack_ix;
a0d0e21e 1708
3280af22 1709 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1710 /* Handle first BEGIN of -d. */
3280af22 1711 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
1712 /* Try harder, since this may have been a sighandler, thus
1713 * curstash may be meaningless. */
3280af22 1714 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1715 && !(flags & G_NODEBUG))
533c011a 1716 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1717
968b3946
GS
1718 if (flags & G_METHOD) {
1719 Zero(&method_op, 1, UNOP);
1720 method_op.op_next = PL_op;
1721 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1722 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1723 PL_op = (OP*)&method_op;
968b3946
GS
1724 }
1725
312caa8e 1726 if (!(flags & G_EVAL)) {
0cdb2077 1727 CATCH_SET(TRUE);
14dd3ad8 1728 call_body((OP*)&myop, FALSE);
312caa8e 1729 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1730 CATCH_SET(oldcatch);
312caa8e
CS
1731 }
1732 else {
d78bda3d 1733 myop.op_other = (OP*)&myop;
3280af22 1734 PL_markstack_ptr--;
4633a7c4
LW
1735 /* we're trying to emulate pp_entertry() here */
1736 {
c09156bb 1737 register PERL_CONTEXT *cx;
54310121 1738 I32 gimme = GIMME_V;
ac27b0f5 1739
4633a7c4
LW
1740 ENTER;
1741 SAVETMPS;
ac27b0f5 1742
968b3946 1743 push_return(Nullop);
1d76a5c3 1744 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1745 PUSHEVAL(cx, 0, 0);
533c011a 1746 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1747
faef0170 1748 PL_in_eval = EVAL_INEVAL;
4633a7c4 1749 if (flags & G_KEEPERR)
faef0170 1750 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1751 else
38a03e6e 1752 sv_setpv(ERRSV,"");
4633a7c4 1753 }
3280af22 1754 PL_markstack_ptr++;
a0d0e21e 1755
14dd3ad8
GS
1756#ifdef PERL_FLEXIBLE_EXCEPTIONS
1757 redo_body:
1758 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1759 (OP*)&myop, FALSE);
14dd3ad8
GS
1760#else
1761 JMPENV_PUSH(ret);
1762#endif
6224f72b
GS
1763 switch (ret) {
1764 case 0:
14dd3ad8
GS
1765#ifndef PERL_FLEXIBLE_EXCEPTIONS
1766 redo_body:
1767 call_body((OP*)&myop, FALSE);
1768#endif
312caa8e
CS
1769 retval = PL_stack_sp - (PL_stack_base + oldmark);
1770 if (!(flags & G_KEEPERR))
1771 sv_setpv(ERRSV,"");
a0d0e21e 1772 break;
6224f72b 1773 case 1:
f86702cc 1774 STATUS_ALL_FAILURE;
a0d0e21e 1775 /* FALL THROUGH */
6224f72b 1776 case 2:
a0d0e21e 1777 /* my_exit() was called */
3280af22 1778 PL_curstash = PL_defstash;
a0d0e21e 1779 FREETMPS;
14dd3ad8 1780 JMPENV_POP;
cc3604b1 1781 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1782 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1783 my_exit_jump();
a0d0e21e 1784 /* NOTREACHED */
6224f72b 1785 case 3:
3280af22 1786 if (PL_restartop) {
533c011a 1787 PL_op = PL_restartop;
3280af22 1788 PL_restartop = 0;
312caa8e 1789 goto redo_body;
a0d0e21e 1790 }
3280af22 1791 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1792 if (flags & G_ARRAY)
1793 retval = 0;
1794 else {
1795 retval = 1;
3280af22 1796 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1797 }
312caa8e 1798 break;
a0d0e21e 1799 }
a0d0e21e 1800
3280af22 1801 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
1802 SV **newsp;
1803 PMOP *newpm;
1804 I32 gimme;
c09156bb 1805 register PERL_CONTEXT *cx;
a0a2876f
LW
1806 I32 optype;
1807
1808 POPBLOCK(cx,newpm);
1809 POPEVAL(cx);
1810 pop_return();
3280af22 1811 PL_curpm = newpm;
a0a2876f 1812 LEAVE;
a0d0e21e 1813 }
14dd3ad8 1814 JMPENV_POP;
a0d0e21e 1815 }
1e422769 1816
a0d0e21e 1817 if (flags & G_DISCARD) {
3280af22 1818 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1819 retval = 0;
1820 FREETMPS;
1821 LEAVE;
1822 }
533c011a 1823 PL_op = oldop;
a0d0e21e
LW
1824 return retval;
1825}
1826
14dd3ad8 1827#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1828STATIC void *
14dd3ad8 1829S_vcall_body(pTHX_ va_list args)
312caa8e
CS
1830{
1831 OP *myop = va_arg(args, OP*);
1832 int is_eval = va_arg(args, int);
1833
14dd3ad8 1834 call_body(myop, is_eval);
312caa8e
CS
1835 return NULL;
1836}
14dd3ad8 1837#endif
312caa8e
CS
1838
1839STATIC void
14dd3ad8 1840S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1841{
312caa8e
CS
1842 if (PL_op == myop) {
1843 if (is_eval)
f807eda9 1844 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1845 else
f807eda9 1846 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
1847 }
1848 if (PL_op)
cea2e8a9 1849 CALLRUNOPS(aTHX);
312caa8e
CS
1850}
1851
6e72f9df 1852/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1853
954c1994
GS
1854/*
1855=for apidoc p||eval_sv
1856
1857Tells Perl to C<eval> the string in the SV.
1858
1859=cut
1860*/
1861
a0d0e21e 1862I32
864dbfa3 1863Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1864
8ac85365 1865 /* See G_* flags in cop.h */
a0d0e21e 1866{
924508f0 1867 dSP;
a0d0e21e 1868 UNOP myop; /* fake syntax tree node */
3280af22 1869 I32 oldmark = SP - PL_stack_base;
4633a7c4 1870 I32 retval;
4633a7c4 1871 I32 oldscope;
6224f72b 1872 int ret;
533c011a 1873 OP* oldop = PL_op;
db36c5a1 1874 dJMPENV;
84902520 1875
4633a7c4
LW
1876 if (flags & G_DISCARD) {
1877 ENTER;
1878 SAVETMPS;
1879 }
1880
462e5cf6 1881 SAVEOP();
533c011a
NIS
1882 PL_op = (OP*)&myop;
1883 Zero(PL_op, 1, UNOP);
3280af22
NIS
1884 EXTEND(PL_stack_sp, 1);
1885 *++PL_stack_sp = sv;
1886 oldscope = PL_scopestack_ix;
79072805 1887
4633a7c4
LW
1888 if (!(flags & G_NOARGS))
1889 myop.op_flags = OPf_STACKED;
79072805 1890 myop.op_next = Nullop;
6e72f9df 1891 myop.op_type = OP_ENTEREVAL;
54310121
PP
1892 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1893 (flags & G_ARRAY) ? OPf_WANT_LIST :
1894 OPf_WANT_SCALAR);
6e72f9df
PP
1895 if (flags & G_KEEPERR)
1896 myop.op_flags |= OPf_SPECIAL;
4633a7c4 1897
14dd3ad8 1898#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1899 redo_body:
14dd3ad8 1900 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1901 (OP*)&myop, TRUE);
14dd3ad8
GS
1902#else
1903 JMPENV_PUSH(ret);
1904#endif
6224f72b
GS
1905 switch (ret) {
1906 case 0:
14dd3ad8
GS
1907#ifndef PERL_FLEXIBLE_EXCEPTIONS
1908 redo_body:
1909 call_body((OP*)&myop,TRUE);
1910#endif
312caa8e
CS
1911 retval = PL_stack_sp - (PL_stack_base + oldmark);
1912 if (!(flags & G_KEEPERR))
1913 sv_setpv(ERRSV,"");
4633a7c4 1914 break;
6224f72b 1915 case 1:
f86702cc 1916 STATUS_ALL_FAILURE;
4633a7c4 1917 /* FALL THROUGH */
6224f72b 1918 case 2:
4633a7c4 1919 /* my_exit() was called */
3280af22 1920 PL_curstash = PL_defstash;
4633a7c4 1921 FREETMPS;
14dd3ad8 1922 JMPENV_POP;
cc3604b1 1923 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1924 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1925 my_exit_jump();
4633a7c4 1926 /* NOTREACHED */
6224f72b 1927 case 3:
3280af22 1928 if (PL_restartop) {
533c011a 1929 PL_op = PL_restartop;
3280af22 1930 PL_restartop = 0;
312caa8e 1931 goto redo_body;
4633a7c4 1932 }
3280af22 1933 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
1934 if (flags & G_ARRAY)
1935 retval = 0;
1936 else {
1937 retval = 1;
3280af22 1938 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 1939 }
312caa8e 1940 break;
4633a7c4
LW
1941 }
1942
14dd3ad8 1943 JMPENV_POP;
4633a7c4 1944 if (flags & G_DISCARD) {
3280af22 1945 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
1946 retval = 0;
1947 FREETMPS;
1948 LEAVE;
1949 }
533c011a 1950 PL_op = oldop;
4633a7c4
LW
1951 return retval;
1952}
1953
954c1994
GS
1954/*
1955=for apidoc p||eval_pv
1956
1957Tells Perl to C<eval> the given string and return an SV* result.
1958
1959=cut
1960*/
1961
137443ea 1962SV*
864dbfa3 1963Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
1964{
1965 dSP;
1966 SV* sv = newSVpv(p, 0);
1967
864dbfa3 1968 eval_sv(sv, G_SCALAR);
137443ea
PP
1969 SvREFCNT_dec(sv);
1970
1971 SPAGAIN;
1972 sv = POPs;
1973 PUTBACK;
1974
2d8e6c8d
GS
1975 if (croak_on_error && SvTRUE(ERRSV)) {
1976 STRLEN n_a;
cea2e8a9 1977 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 1978 }
137443ea
PP
1979
1980 return sv;
1981}
1982
4633a7c4
LW
1983/* Require a module. */
1984
954c1994
GS
1985/*
1986=for apidoc p||require_pv
1987
7d3fb230
BS
1988Tells Perl to C<require> the file named by the string argument. It is
1989analogous to the Perl code C<eval "require '$file'">. It's even
1990implemented that way; consider using Perl_load_module instead.
954c1994 1991
7d3fb230 1992=cut */
954c1994 1993
4633a7c4 1994void
864dbfa3 1995Perl_require_pv(pTHX_ const char *pv)
4633a7c4 1996{
d3acc0f7
JP
1997 SV* sv;
1998 dSP;
e788e7d3 1999 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2000 PUTBACK;
2001 sv = sv_newmortal();
4633a7c4
LW
2002 sv_setpv(sv, "require '");
2003 sv_catpv(sv, pv);
2004 sv_catpv(sv, "'");
864dbfa3 2005 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2006 SPAGAIN;
2007 POPSTACK;
79072805
LW
2008}
2009
79072805 2010void
864dbfa3 2011Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW
2012{
2013 register GV *gv;
2014
155aba94 2015 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
79072805
LW
2016 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
2017}
2018
76e3520e 2019STATIC void
cea2e8a9 2020S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2021{
ab821d7f
PP
2022 /* This message really ought to be max 23 lines.
2023 * Removed -h because the user already knows that opton. Others? */
fb73857a 2024
76e3520e 2025 static char *usage_msg[] = {
fb73857a
PP
2026"-0[octal] specify record separator (\\0, if no argument)",
2027"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2028"-C enable native wide character system interfaces",
1950ee41 2029"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2030"-d[:debugger] run program under debugger",
2031"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2032"-e 'command' one line of program (several -e's allowed, omit programfile)",
2033"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2034"-i[extension] edit <> files in place (makes backup if extension supplied)",
2035"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2036"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2037"-[mM][-]module execute `use/no module...' before executing program",
2038"-n assume 'while (<>) { ... }' loop around program",
2039"-p assume loop like -n but print line also, like sed",
2040"-P run program through C preprocessor before compilation",
2041"-s enable rudimentary parsing for switches after programfile",
2042"-S look for programfile using PATH environment variable",
2043"-T enable tainting checks",
2044"-u dump core after parsing program",
fb73857a 2045"-U allow unsafe operations",
aac3bd0d
GS
2046"-v print version, subversion (includes VERY IMPORTANT perl info)",
2047"-V[:variable] print configuration summary (or a single Config.pm variable)",
2048"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS
2049"-W enable all warnings",
2050"-X disable all warnings",
fb73857a
PP
2051"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2052"\n",
2053NULL
2054};
76e3520e 2055 char **p = usage_msg;
fb73857a 2056
b0e47665
GS
2057 PerlIO_printf(PerlIO_stdout(),
2058 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2059 name);
fb73857a 2060 while (*p)
b0e47665 2061 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2062}
2063
79072805
LW
2064/* This routine handles any switches that can be given during run */
2065
2066char *
864dbfa3 2067Perl_moreswitches(pTHX_ char *s)
79072805 2068{
ba210ebe 2069 STRLEN numlen;
c07a80fd 2070 U32 rschar;
79072805
LW
2071
2072 switch (*s) {
2073 case '0':
a863c7d1 2074 {
b21ed0a9 2075 numlen = 0; /* disallow underscores */
dff6d3cd 2076 rschar = (U32)scan_oct(s, 4, &numlen);
3280af22 2077 SvREFCNT_dec(PL_nrs);
c07a80fd 2078 if (rschar & ~((U8)~0))
3280af22 2079 PL_nrs = &PL_sv_undef;
c07a80fd 2080 else if (!rschar && numlen >= 2)
79cb57f6 2081 PL_nrs = newSVpvn("", 0);
c07a80fd
PP
2082 else {
2083 char ch = rschar;
79cb57f6 2084 PL_nrs = newSVpvn(&ch, 1);
79072805
LW
2085 }
2086 return s + numlen;
a863c7d1 2087 }
46487f74
GS
2088 case 'C':
2089 PL_widesyscalls = TRUE;
2090 s++;
2091 return s;
2304df62 2092 case 'F':
3280af22
NIS
2093 PL_minus_F = TRUE;
2094 PL_splitstr = savepv(s + 1);
2304df62
AD
2095 s += strlen(s);
2096 return s;
79072805 2097 case 'a':
3280af22 2098 PL_minus_a = TRUE;
79072805
LW
2099 s++;
2100 return s;
2101 case 'c':
3280af22 2102 PL_minus_c = TRUE;
79072805
LW
2103 s++;
2104 return s;
2105 case 'd':
bbce6d69 2106 forbid_setid("-d");
4633a7c4 2107 s++;
70c94a19
RR
2108 /* The following permits -d:Mod to accepts arguments following an =
2109 in the fashion that -MSome::Mod does. */
2110 if (*s == ':' || *s == '=') {
2111 char *start;
2112 SV *sv;
2113 sv = newSVpv("use Devel::", 0);
2114 start = ++s;
2115 /* We now allow -d:Module=Foo,Bar */
2116 while(isALNUM(*s) || *s==':') ++s;
2117 if (*s != '=')
2118 sv_catpv(sv, start);
2119 else {
2120 sv_catpvn(sv, start, s-start);
2121 sv_catpv(sv, " split(/,/,q{");
2122 sv_catpv(sv, ++s);
2123 sv_catpv(sv, "})");
2124 }
4633a7c4 2125 s += strlen(s);
70c94a19 2126 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2127 }
ed094faf 2128 if (!PL_perldb) {
3280af22 2129 PL_perldb = PERLDB_ALL;
a0d0e21e 2130 init_debugger();
ed094faf 2131 }
79072805
LW
2132 return s;
2133 case 'D':
0453d815 2134 {
79072805 2135#ifdef DEBUGGING
bbce6d69 2136 forbid_setid("-D");
79072805 2137 if (isALPHA(s[1])) {
04932ac8
DM
2138 /* if adding extra options, remember to update DEBUG_MASK */
2139 static char debopts[] = "psltocPmfrxuLHXDSTR";
79072805
LW
2140 char *d;
2141
93a17b20 2142 for (s++; *s && (d = strchr(debopts,*s)); s++)
3280af22 2143 PL_debug |= 1 << (d - debopts);
79072805
LW
2144 }
2145 else {
3280af22 2146 PL_debug = atoi(s+1);
79072805
LW
2147 for (s++; isDIGIT(*s); s++) ;
2148 }
aea4f609 2149 PL_debug |= DEBUG_TOP_FLAG;
79072805 2150#else
0453d815
PM
2151 if (ckWARN_d(WARN_DEBUGGING))
2152 Perl_warner(aTHX_ WARN_DEBUGGING,
2153 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2154 for (s++; isALNUM(*s); s++) ;
79072805
LW
2155#endif
2156 /*SUPPRESS 530*/
2157 return s;
0453d815 2158 }
4633a7c4 2159 case 'h':
ac27b0f5 2160 usage(PL_origargv[0]);
6ad3d225 2161 PerlProc_exit(0);
79072805 2162 case 'i':
3280af22
NIS
2163 if (PL_inplace)
2164 Safefree(PL_inplace);
2165 PL_inplace = savepv(s+1);
79072805 2166 /*SUPPRESS 530*/
3280af22 2167 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2168 if (*s) {
fb73857a 2169 *s++ = '\0';
7b8d334a
GS
2170 if (*s == '-') /* Additional switches on #! line. */
2171 s++;
2172 }
fb73857a
PP
2173 return s;
2174 case 'I': /* -I handled both here and in parse_perl() */
bbce6d69 2175 forbid_setid("-I");
fb73857a
PP
2176 ++s;
2177 while (*s && isSPACE(*s))
2178 ++s;
2179 if (*s) {
774d564b 2180 char *e, *p;
0df16ed7
GS
2181 p = s;
2182 /* ignore trailing spaces (possibly followed by other switches) */
2183 do {
2184 for (e = p; *e && !isSPACE(*e); e++) ;
2185 p = e;
2186 while (isSPACE(*p))
2187 p++;
2188 } while (*p && *p != '-');
2189 e = savepvn(s, e-s);
9c8a64f0 2190 incpush(e, TRUE, TRUE);
0df16ed7
GS
2191 Safefree(e);
2192 s = p;
2193 if (*s == '-')
2194 s++;
79072805
LW
2195 }
2196 else
a67e862a 2197 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2198 return s;
79072805 2199 case 'l':
3280af22 2200 PL_minus_l = TRUE;
79072805 2201 s++;
7889fe52
NIS
2202 if (PL_ors_sv) {
2203 SvREFCNT_dec(PL_ors_sv);
2204 PL_ors_sv = Nullsv;
2205 }
79072805 2206 if (isDIGIT(*s)) {
7889fe52 2207 PL_ors_sv = newSVpvn("\n",1);
b21ed0a9 2208 numlen = 0; /* disallow underscores */
7889fe52 2209 *SvPVX(PL_ors_sv) = (char)scan_oct(s, 3 + (*s == '0'), &numlen);
79072805
LW
2210 s += numlen;
2211 }
2212 else {
3280af22 2213 if (RsPARA(PL_nrs)) {
7889fe52
NIS
2214 PL_ors_sv = newSVpvn("\n\n",2);
2215 }
2216 else {
2217 PL_ors_sv = newSVsv(PL_nrs);
c07a80fd 2218 }
79072805
LW
2219 }
2220 return s;
1a30305b 2221 case 'M':
bbce6d69 2222 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2223 /* FALL THROUGH */
2224 case 'm':
bbce6d69 2225 forbid_setid("-m"); /* XXX ? */
1a30305b 2226 if (*++s) {
a5f75d66 2227 char *start;
11343788 2228 SV *sv;
a5f75d66
AD
2229 char *use = "use ";
2230 /* -M-foo == 'no foo' */
2231 if (*s == '-') { use = "no "; ++s; }
11343788 2232 sv = newSVpv(use,0);
a5f75d66 2233 start = s;
1a30305b 2234 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2235 while(isALNUM(*s) || *s==':') ++s;
2236 if (*s != '=') {
11343788 2237 sv_catpv(sv, start);
c07a80fd
PP
2238 if (*(start-1) == 'm') {
2239 if (*s != '\0')
cea2e8a9 2240 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2241 sv_catpv( sv, " ()");
c07a80fd
PP
2242 }
2243 } else {
6df41af2 2244 if (s == start)
be98fb35
GS
2245 Perl_croak(aTHX_ "Module name required with -%c option",
2246 s[-1]);
11343788
MB
2247 sv_catpvn(sv, start, s-start);
2248 sv_catpv(sv, " split(/,/,q{");
2249 sv_catpv(sv, ++s);
2250 sv_catpv(sv, "})");
c07a80fd 2251 }
1a30305b 2252 s += strlen(s);
5c831c24 2253 if (!PL_preambleav)
3280af22
NIS
2254 PL_preambleav = newAV();
2255 av_push(PL_preambleav, sv);
1a30305b
PP
2256 }
2257 else
cea2e8a9 2258 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2259 return s;
79072805 2260 case 'n':
3280af22 2261 PL_minus_n = TRUE;
79072805
LW
2262 s++;
2263 return s;
2264 case 'p':
3280af22 2265 PL_minus_p = TRUE;
79072805
LW
2266 s++;
2267 return s;
2268 case 's':
bbce6d69 2269 forbid_setid("-s");
3280af22 2270 PL_doswitches = TRUE;
79072805
LW
2271 s++;
2272 return s;
463ee0b2 2273 case 'T':
3280af22 2274 if (!PL_tainting)
cea2e8a9 2275 Perl_croak(aTHX_ "Too late for \"-T\" option");
463ee0b2
LW
2276 s++;
2277 return s;
79072805 2278 case 'u':
bf4acbe4
GS
2279#ifdef MACOS_TRADITIONAL
2280 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2281#endif
3280af22 2282 PL_do_undump = TRUE;
79072805
LW
2283 s++;
2284 return s;
2285 case 'U':
3280af22 2286 PL_unsafe = TRUE;
79072805
LW
2287 s++;
2288 return s;
2289 case 'v':
b0e47665 2290 PerlIO_printf(PerlIO_stdout(),
d2560b70 2291 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2292 PL_patchlevel, ARCHNAME));
fb73857a
PP
2293#if defined(LOCAL_PATCH_COUNT)
2294 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2295 PerlIO_printf(PerlIO_stdout(),
2296 "\n(with %d registered patch%s, "
2297 "see perl -V for more detail)",
2298 (int)LOCAL_PATCH_COUNT,
2299 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2300#endif
1a30305b 2301
b0e47665 2302 PerlIO_printf(PerlIO_stdout(),
bc89e66f 2303 "\n\nCopyright 1987-2001, Larry Wall\n");
eae9c151
JH
2304#ifdef MACOS_TRADITIONAL
2305 PerlIO_printf(PerlIO_stdout(),
084592ab 2306 "\nMac OS port Copyright (c) 1991-2001, Matthias Neeracher\n");
eae9c151 2307#endif
79072805 2308#ifdef MSDOS
b0e47665
GS
2309 PerlIO_printf(PerlIO_stdout(),
2310 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2311#endif
2312#ifdef DJGPP
b0e47665
GS
2313 PerlIO_printf(PerlIO_stdout(),
2314 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2315 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2316#endif
79072805 2317#ifdef OS2
b0e47665
GS
2318 PerlIO_printf(PerlIO_stdout(),
2319 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2320 "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2321#endif
79072805 2322#ifdef atarist
b0e47665
GS
2323 PerlIO_printf(PerlIO_stdout(),
2324 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2325#endif
a3f9223b 2326#ifdef __BEOS__
b0e47665
GS
2327 PerlIO_printf(PerlIO_stdout(),
2328 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2329#endif
1d84e8df 2330#ifdef MPE
b0e47665
GS
2331 PerlIO_printf(PerlIO_stdout(),
2332 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-1999\n");
1d84e8df 2333#endif
9d116dd7 2334#ifdef OEMVS
b0e47665
GS
2335 PerlIO_printf(PerlIO_stdout(),
2336 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2337#endif
495c5fdc 2338#ifdef __VOS__
b0e47665
GS
2339 PerlIO_printf(PerlIO_stdout(),
2340 "Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n");
495c5fdc 2341#endif
092bebab 2342#ifdef __OPEN_VM
b0e47665
GS
2343 PerlIO_printf(PerlIO_stdout(),
2344 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2345#endif
a1a0e61e 2346#ifdef POSIX_BC
b0e47665
GS
2347 PerlIO_printf(PerlIO_stdout(),
2348 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2349#endif
61ae2fbf 2350#ifdef __MINT__
b0e47665
GS
2351 PerlIO_printf(PerlIO_stdout(),
2352 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2353#endif
f83d2536 2354#ifdef EPOC
b0e47665
GS
2355 PerlIO_printf(PerlIO_stdout(),
2356 "EPOC port by Olaf Flebbe, 1999-2000\n");
f83d2536 2357#endif
baed7233
DL
2358#ifdef BINARY_BUILD_NOTICE
2359 BINARY_BUILD_NOTICE;
2360#endif
b0e47665
GS
2361 PerlIO_printf(PerlIO_stdout(),
2362 "\n\
79072805 2363Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2364GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2365Complete documentation for Perl, including FAQ lists, should be found on\n\
2366this system using `man perl' or `perldoc perl'. If you have access to the\n\
2367Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
6ad3d225 2368 PerlProc_exit(0);
79072805 2369 case 'w':
599cee73 2370 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2371 PL_dowarn |= G_WARN_ON;
599cee73
PM
2372 s++;
2373 return s;
2374 case 'W':
ac27b0f5 2375 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
d3a7d8c7 2376 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2377 s++;
2378 return s;
2379 case 'X':
ac27b0f5 2380 PL_dowarn = G_WARN_ALL_OFF;
d3a7d8c7 2381 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2382 s++;
2383 return s;
a0d0e21e 2384 case '*':
79072805
LW
2385 case ' ':
2386 if (s[1] == '-') /* Additional switches on #! line. */
2387 return s+2;
2388 break;
a0d0e21e 2389 case '-':
79072805 2390 case 0:
51882d45 2391#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2392 case '\r':
2393#endif
79072805
LW
2394 case '\n':
2395 case '\t':
2396 break;
aa689395
PP
2397#ifdef ALTERNATE_SHEBANG
2398 case 'S': /* OS/2 needs -S on "extproc" line. */
2399 break;
2400#endif
a0d0e21e 2401 case 'P':
3280af22 2402 if (PL_preprocess)
a0d0e21e
LW
2403 return s+1;
2404 /* FALL THROUGH */
79072805 2405 default:
cea2e8a9 2406 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2407 }
2408 return Nullch;
2409}
2410
2411/* compliments of Tom Christiansen */
2412
2413/* unexec() can be found in the Gnu emacs distribution */
ee580363 2414/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2415
2416void
864dbfa3 2417Perl_my_unexec(pTHX)
79072805
LW
2418{
2419#ifdef UNEXEC
46fc3d4c
PP
2420 SV* prog;
2421 SV* file;
ee580363 2422 int status = 1;
79072805
LW
2423 extern int etext;
2424
ee580363 2425 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2426 sv_catpv(prog, "/perl");
6b88bc9c 2427 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2428 sv_catpv(file, ".perldump");
79072805 2429
ee580363
GS
2430 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2431 /* unexec prints msg to stderr in case of failure */
6ad3d225 2432 PerlProc_exit(status);
79072805 2433#else
a5f75d66
AD
2434# ifdef VMS
2435# include <lib$routines.h>
2436 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2437# else
79072805 2438 ABORT(); /* for use with undump */
aa689395 2439# endif
a5f75d66 2440#endif
79072805
LW
2441}
2442
cb68f92d
GS
2443/* initialize curinterp */
2444STATIC void
cea2e8a9 2445S_init_interp(pTHX)
cb68f92d
GS
2446{
2447
066ef5b5 2448#ifdef PERL_OBJECT /* XXX kludge */
cb68f92d 2449#define I_REINIT \
6b88bc9c
GS
2450 STMT_START { \
2451 PL_chopset = " \n-"; \
2452 PL_copline = NOLINE; \
2453 PL_curcop = &PL_compiling;\
2454 PL_curcopdb = NULL; \
2455 PL_dbargs = 0; \
3967c732 2456 PL_dumpindent = 4; \
6b88bc9c
GS
2457 PL_laststatval = -1; \
2458 PL_laststype = OP_STAT; \
2459 PL_maxscream = -1; \
2460 PL_maxsysfd = MAXSYSFD; \
2461 PL_statname = Nullsv; \
2462 PL_tmps_floor = -1; \
2463 PL_tmps_ix = -1; \
2464 PL_op_mask = NULL; \
6b88bc9c
GS
2465 PL_laststatval = -1; \
2466 PL_laststype = OP_STAT; \
2467 PL_mess_sv = Nullsv; \
2468 PL_splitstr = " "; \
2469 PL_generation = 100; \
2470 PL_exitlist = NULL; \
2471 PL_exitlistlen = 0; \
2472 PL_regindent = 0; \
2473 PL_in_clean_objs = FALSE; \
2474 PL_in_clean_all = FALSE; \
2475 PL_profiledata = NULL; \
2476 PL_rsfp = Nullfp; \
2477 PL_rsfp_filters = Nullav; \
24d3c518 2478 PL_dirty = FALSE; \
cb68f92d 2479 } STMT_END
9666903d 2480 I_REINIT;
066ef5b5
GS
2481#else
2482# ifdef MULTIPLICITY
2483# define PERLVAR(var,type)
51371543 2484# define PERLVARA(var,n,type)
cea2e8a9 2485# if defined(PERL_IMPLICIT_CONTEXT)
54aff467
GS
2486# if defined(USE_THREADS)
2487# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2488# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
2489# else /* !USE_THREADS */
2490# define PERLVARI(var,type,init) aTHX->var = init;
2491# define PERLVARIC(var,type,init) aTHX->var = init;
2492# endif /* USE_THREADS */
cea2e8a9 2493# else
c5be433b
GS
2494# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2495# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
cea2e8a9 2496# endif
066ef5b5
GS
2497# include "intrpvar.h"
2498# ifndef USE_THREADS
2499# include "thrdvar.h"
2500# endif
2501# undef PERLVAR
51371543 2502# undef PERLVARA
066ef5b5
GS
2503# undef PERLVARI
2504# undef PERLVARIC
3967c732 2505# else
066ef5b5 2506# define PERLVAR(var,type)
51371543 2507# define PERLVARA(var,n,type)
533c011a
NIS
2508# define PERLVARI(var,type,init) PL_##var = init;
2509# define PERLVARIC(var,type,init) PL_##var = init;
066ef5b5
GS
2510# include "intrpvar.h"
2511# ifndef USE_THREADS
2512# include "thrdvar.h"
2513# endif
2514# undef PERLVAR
51371543 2515# undef PERLVARA
066ef5b5
GS
2516# undef PERLVARI
2517# undef PERLVARIC
2518# endif
cb68f92d
GS
2519#endif
2520
cb68f92d
GS
2521}
2522
76e3520e 2523STATIC void
cea2e8a9 2524S_init_main_stash(pTHX)
79072805 2525{
463ee0b2 2526 GV *gv;
6e72f9df
PP
2527
2528 /* Note that strtab is a rather special HV. Assumptions are made
2529 about not iterating on it, and not adding tie magic to it.
2530 It is properly deallocated in perl_destruct() */
3280af22 2531 PL_strtab = newHV();
5f08fbcd
GS
2532#ifdef USE_THREADS
2533 MUTEX_INIT(&PL_strtab_mutex);
2534#endif
3280af22
NIS
2535 HvSHAREKEYS_off(PL_strtab); /* mandatory */
2536 hv_ksplit(PL_strtab, 512);
ac27b0f5 2537
3280af22 2538 PL_curstash = PL_defstash = newHV();
79cb57f6 2539 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
2540 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2541 SvREFCNT_dec(GvHV(gv));
3280af22 2542 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2543 SvREADONLY_on(gv);
3280af22
NIS
2544 HvNAME(PL_defstash) = savepv("main");
2545 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2546 GvMULTI_on(PL_incgv);
2547 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2548 GvMULTI_on(PL_hintgv);
2549 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2550 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2551 GvMULTI_on(PL_errgv);
2552 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2553 GvMULTI_on(PL_replgv);
cea2e8a9 2554 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
2555 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2556 sv_setpvn(ERRSV, "", 0);
3280af22 2557 PL_curstash = PL_defstash;
11faa288 2558 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2559 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2560 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
92d29cee 2561 PL_nullstash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2562 /* We must init $/ before switches are processed. */
864dbfa3 2563 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
2564}
2565
76e3520e 2566STATIC void
cea2e8a9 2567S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2568{
6c4ab083 2569 *fdscript = -1;
79072805 2570
3280af22
NIS
2571 if (PL_e_script) {
2572 PL_origfilename = savepv("-e");
96436eeb 2573 }
6c4ab083
GS
2574 else {
2575 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2576 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
2577
2578 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2579 char *s = scriptname + 8;
2580 *fdscript = atoi(s);
2581 while (isDIGIT(*s))
2582 s++;
2583 if (*s) {
2584 scriptname = savepv(s + 1);
3280af22
NIS
2585 Safefree(PL_origfilename);
2586 PL_origfilename = scriptname;
6c4ab083
GS
2587 }
2588 }
2589 }
2590
f4dd75d9
GS
2591#ifdef USE_ITHREADS
2592 Safefree(CopFILE(PL_curcop));
2593#else
2594 SvREFCNT_dec(CopFILEGV(PL_curcop));
2595#endif
57843af0 2596 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2597 if (strEQ(PL_origfilename,"-"))
79072805 2598 scriptname = "";
01f988be 2599 if (*fdscript >= 0) {
3280af22 2600 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
96436eeb 2601#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS
2602 if (PL_rsfp)
2603 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb
PP
2604#endif
2605 }
3280af22 2606 else if (PL_preprocess) {
46fc3d4c 2607 char *cpp_cfg = CPPSTDIN;
79cb57f6 2608 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
2609 SV *cmd = NEWSV(0,0);
2610
2611 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2612 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2613 sv_catpv(cpp, cpp_cfg);
79072805 2614
0df16ed7 2615 sv_catpvn(sv, "-I", 2);
fed7345c 2616 sv_catpv(sv,PRIVLIB_EXP);
46fc3d4c 2617
14953ddc
MB
2618 DEBUG_P(PerlIO_printf(Perl_debug_log,
2619 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2620 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
52853b95 2621#if defined(MSDOS) || defined(WIN32)
cea2e8a9 2622 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW
2623sed %s -e \"/^[^#]/b\" \
2624 -e \"/^#[ ]*include[ ]/b\" \
2625 -e \"/^#[ ]*define[ ]/b\" \
2626 -e \"/^#[ ]*if[ ]/b\" \
2627 -e \"/^#[ ]*ifdef[ ]/b\" \
2628 -e \"/^#[ ]*ifndef[ ]/b\" \
2629 -e \"/^#[ ]*else/b\" \
2630 -e \"/^#[ ]*elif[ ]/b\" \
2631 -e \"/^#[ ]*undef[ ]/b\" \
2632 -e \"/^#[ ]*endif/b\" \
2633 -e \"s/^#.*//\" \
894356b3 2634 %s | %"SVf" -C %"SVf" %s",
6b88bc9c 2635 (PL_doextract ? "-e \"1,/^#/d\n\"" : ""),
79072805 2636#else
092bebab 2637# ifdef __OPEN_VM
cea2e8a9 2638 Perl_sv_setpvf(aTHX_ cmd, "\
092bebab
JH
2639%s %s -e '/^[^#]/b' \
2640 -e '/^#[ ]*include[ ]/b' \
2641 -e '/^#[ ]*define[ ]/b' \
2642 -e '/^#[ ]*if[ ]/b' \
2643 -e '/^#[ ]*ifdef[ ]/b' \
2644 -e '/^#[ ]*ifndef[ ]/b' \
2645 -e '/^#[ ]*else/b' \
2646 -e '/^#[ ]*elif[ ]/b' \
2647 -e '/^#[ ]*undef[ ]/b' \
2648 -e '/^#[ ]*endif/b' \
2649 -e 's/^[ ]*#.*//' \
894356b3 2650 %s | %"SVf" %"SVf" %s",
092bebab 2651# else
cea2e8a9 2652 Perl_sv_setpvf(aTHX_ cmd, "\
79072805
LW
2653%s %s -e '/^[^#]/b' \
2654 -e '/^#[ ]*include[ ]/b' \
2655 -e '/^#[ ]*define[ ]/b' \
2656 -e '/^#[ ]*if[ ]/b' \
2657 -e '/^#[ ]*ifdef[ ]/b' \
2658 -e '/^#[ ]*ifndef[ ]/b' \
2659 -e '/^#[ ]*else/b' \
2660 -e '/^#[ ]*elif[ ]/b' \
2661 -e '/^#[ ]*undef[ ]/b' \
2662 -e '/^#[ ]*endif/b' \
2663 -e 's/^[ ]*#.*//' \
894356b3 2664 %s | %"SVf" -C %"SVf" %s",
092bebab 2665# endif
79072805
LW
2666#ifdef LOC_SED
2667 LOC_SED,
2668#else
2669 "sed",
2670#endif
3280af22 2671 (PL_doextract ? "-e '1,/^#/d\n'" : ""),
79072805 2672#endif
46fc3d4c 2673 scriptname, cpp, sv, CPPMINUS);
3280af22 2674 PL_doextract = FALSE;
79072805 2675#ifdef IAMSUID /* actually, this is caught earlier */
b28d0864 2676 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
79072805 2677#ifdef HAS_SETEUID
b28d0864 2678 (void)seteuid(PL_uid); /* musn't stay setuid root */
79072805
LW
2679#else
2680#ifdef HAS_SETREUID
b28d0864 2681 (void)setreuid((Uid_t)-1, PL_uid);
85e6fe83
LW
2682#else
2683#ifdef HAS_SETRESUID
b28d0864 2684 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
79072805 2685#else
b28d0864 2686 PerlProc_setuid(PL_uid);
79072805
LW
2687#endif
2688#endif
85e6fe83 2689#endif
b28d0864 2690 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2691 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805
LW
2692 }
2693#endif /* IAMSUID */
3280af22 2694 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c
PP
2695 SvREFCNT_dec(cmd);
2696 SvREFCNT_dec(cpp);
79072805
LW
2697 }
2698 else if (!*scriptname) {
bbce6d69 2699 forbid_setid("program input from stdin");
3280af22 2700 PL_rsfp = PerlIO_stdin();
79072805 2701 }
96436eeb 2702 else {
3280af22 2703 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
96436eeb 2704#if defined(HAS_FCNTL) && defined(F_SETFD)
3280af22
NIS
2705 if (PL_rsfp)
2706 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
96436eeb
PP
2707#endif
2708 }
3280af22 2709 if (!PL_rsfp) {
13281fa4 2710#ifdef DOSUID
a687059c 2711#ifndef IAMSUID /* in case script is not readable before setuid */
6b88bc9c 2712 if (PL_euid &&
cc49e20b 2713 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
6b88bc9c
GS
2714 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2715 {
46fc3d4c 2716 /* try again */
a7cb1f99 2717 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
2718 (int)PERL_REVISION, (int)PERL_VERSION,
2719 (int)PERL_SUBVERSION), PL_origargv);
cea2e8a9 2720 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
2721 }
2722#endif
2723#endif
584d69ec
JH
2724#ifdef IAMSUID
2725 errno = EPERM;
2726 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2727 Strerror(errno));
2728#else
cea2e8a9 2729 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
cc49e20b 2730 CopFILE(PL_curcop), Strerror(errno));
584d69ec 2731#endif
13281fa4 2732 }
79072805 2733}
8d063cd8 2734
7b89560d
JH
2735/* Mention
2736 * I_SYSSTATVFS HAS_FSTATVFS
2737 * I_SYSMOUNT
c890dc6c 2738 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
2739 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2740 * here so that metaconfig picks them up. */
2741
104d25b7 2742#ifdef IAMSUID
864dbfa3 2743STATIC int
e688b231 2744S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2745{
0545a864
JH
2746 int check_okay = 0; /* able to do all the required sys/libcalls */
2747 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2748/*
ad27e871 2749 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2750 * fstatvfs() is UNIX98.
0545a864 2751 * fstatfs() is 4.3 BSD.
ad27e871 2752 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
2753 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2754 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
2755 */
2756
6439433f
JH
2757#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2758
2759# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2760 defined(HAS_FSTATVFS)
2761# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2762 struct statvfs stfs;
6439433f 2763
104d25b7
JH
2764 check_okay = fstatvfs(fd, &stfs) == 0;
2765 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2766# endif /* fstatvfs */
ac27b0f5 2767
6439433f
JH
2768# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2769 defined(PERL_MOUNT_NOSUID) && \
2770 defined(HAS_FSTATFS) && \
2771 defined(HAS_STRUCT_STATFS) && \
2772 defined(HAS_STRUCT_STATFS_F_FLAGS)
2773# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2774 struct statfs stfs;
6439433f 2775
104d25b7 2776 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2777 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH
2778# endif /* fstatfs */
2779
2780# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2781 defined(PERL_MOUNT_NOSUID) && \
2782 defined(HAS_FSTAT) && \
2783 defined(HAS_USTAT) && \
2784 defined(HAS_GETMNT) && \
2785 defined(HAS_STRUCT_FS_DATA) && \
2786 defined(NOSTAT_ONE)
2787# define FD_ON_NOSUID_CHECK_OKAY
0545a864 2788 struct stat fdst;
6439433f 2789
0545a864 2790 if (fstat(fd, &fdst) == 0) {
6439433f
JH
2791 struct ustat us;
2792 if (ustat(fdst.st_dev, &us) == 0) {
2793 struct fs_data fsd;
2794 /* NOSTAT_ONE here because we're not examining fields which
2795 * vary between that case and STAT_ONE. */
ad27e871 2796 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
2797 size_t cmplen = sizeof(us.f_fname);
2798 if (sizeof(fsd.fd_req.path) < cmplen)
2799 cmplen = sizeof(fsd.fd_req.path);
2800 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2801 fdst.st_dev == fsd.fd_req.dev) {
2802 check_okay = 1;
2803 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2804 }
2805 }
2806 }
2807 }
0545a864 2808 }
6439433f
JH
2809# endif /* fstat+ustat+getmnt */
2810
2811# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2812 defined(HAS_GETMNTENT) && \
2813 defined(HAS_HASMNTOPT) && \
2814 defined(MNTOPT_NOSUID)
2815# define FD_ON_NOSUID_CHECK_OKAY
2816 FILE *mtab = fopen("/etc/mtab", "r");
2817 struct mntent *entry;
2818 struct stat stb, fsb;
104d25b7
JH
2819
2820 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
2821 while (entry = getmntent(mtab)) {
2822 if (stat(entry->mnt_dir, &fsb) == 0
2823 && fsb.st_dev == stb.st_dev)
2824 {
2825 /* found the filesystem */
2826 check_okay = 1;
2827 if (hasmntopt(entry, MNTOPT_NOSUID))
2828 on_nosuid = 1;
2829 break;
2830 } /* A single fs may well fail its stat(). */
2831 }
104d25b7
JH
2832 }
2833 if (mtab)
6439433f
JH
2834 fclose(mtab);
2835# endif /* getmntent+hasmntopt */
0545a864 2836
ac27b0f5 2837 if (!check_okay)
0545a864 2838 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH
2839 return on_nosuid;
2840}
2841#endif /* IAMSUID */
2842
76e3520e 2843STATIC void
cea2e8a9 2844S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 2845{
155aba94 2846#ifdef IAMSUID
96436eeb 2847 int which;
155aba94 2848#endif
96436eeb 2849
13281fa4
LW
2850 /* do we need to emulate setuid on scripts? */
2851
2852 /* This code is for those BSD systems that have setuid #! scripts disabled
2853 * in the kernel because of a security problem. Merely defining DOSUID
2854 * in perl will not fix that problem, but if you have disabled setuid
2855 * scripts in the kernel, this will attempt to emulate setuid and setgid
2856 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
2857 * root version must be called suidperl or sperlN.NNN. If regular perl
2858 * discovers that it has opened a setuid script, it calls suidperl with
2859 * the same argv that it had. If suidperl finds that the script it has
2860 * just opened is NOT setuid root, it sets the effective uid back to the
2861 * uid. We don't just make perl setuid root because that loses the
2862 * effective uid we had before invoking perl, if it was different from the
2863 * uid.
13281fa4
LW
2864 *
2865 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2866 * be defined in suidperl only. suidperl must be setuid root. The
2867 * Configure script will set this up for you if you want it.
2868 */
a687059c 2869
13281fa4 2870#ifdef DOSUID
6e72f9df 2871 char *s, *s2;
a0d0e21e 2872
b28d0864 2873 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 2874 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 2875 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 2876 I32 len;
2d8e6c8d 2877 STRLEN n_a;
13281fa4 2878
a687059c 2879#ifdef IAMSUID
fe14fcc3 2880#ifndef HAS_SETREUID
a687059c
LW
2881 /* On this access check to make sure the directories are readable,
2882 * there is actually a small window that the user could use to make
2883 * filename point to an accessible directory. So there is a faint
2884 * chance that someone could execute a setuid script down in a
2885 * non-accessible directory. I don't know what to do about that.
2886 * But I don't think it's too important. The manual lies when
2887 * it says access() is useful in setuid programs.
2888 */
cc49e20b 2889 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 2890 Perl_croak(aTHX_ "Permission denied");
a687059c
LW
2891#else
2892 /* If we can swap euid and uid, then we can determine access rights
2893 * with a simple stat of the file, and then compare device and
2894 * inode to make sure we did stat() on the same file we opened.
2895 * Then we just have to make sure he or she can execute it.
2896 */
2897 {
2898 struct stat tmpstatbuf;
2899
85e6fe83
LW
2900 if (
2901#ifdef HAS_SETREUID
b28d0864 2902 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW
2903#else
2904# if HAS_SETRESUID
b28d0864 2905 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 2906# endif
85e6fe83 2907#endif
b28d0864 2908 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 2909 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 2910 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 2911 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 2912#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 2913 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 2914 Perl_croak(aTHX_ "Permission denied");
104d25b7 2915#endif
b28d0864
NIS
2916 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
2917 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
2918 (void)PerlIO_close(PL_rsfp);
cea2e8a9 2919 Perl_croak(aTHX_ "Permission denied\n");
a687059c 2920 }
85e6fe83
LW
2921 if (
2922#ifdef HAS_SETREUID
b28d0864 2923 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW
2924#else
2925# if defined(HAS_SETRESUID)
b28d0864 2926 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 2927# endif
85e6fe83 2928#endif
b28d0864 2929 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 2930 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 2931 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 2932 Perl_croak(aTHX_ "Permission denied\n");
a687059c 2933 }
fe14fcc3 2934#endif /* HAS_SETREUID */
a687059c
LW
2935#endif /* IAMSUID */
2936
b28d0864 2937 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 2938 Perl_croak(aTHX_ "Permission denied");
b28d0864 2939 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 2940 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 2941 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 2942 CopLINE_inc(PL_curcop);
6b88bc9c 2943 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 2944 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 2945 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 2946 s = SvPV(PL_linestr,n_a)+2;
663a0e37 2947 if (*s == ' ') s++;
45d8adaa 2948 while (!isSPACE(*s)) s++;
2d8e6c8d 2949 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df
PP
2950 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2951 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 2952 Perl_croak(aTHX_ "Not a perl script");
a687059c 2953 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
2954 /*
2955 * #! arg must be what we saw above. They can invoke it by
2956 * mentioning suidperl explicitly, but they may not add any strange
2957 * arguments beyond what #! says if they do invoke suidperl that way.
2958 */
2959 len = strlen(validarg);
2960 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 2961 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 2962 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW
2963
2964#ifndef IAMSUID
b28d0864
NIS
2965 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
2966 PL_euid == PL_statbuf.st_uid)
2967 if (!PL_do_undump)
cea2e8a9 2968 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
2969FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2970#endif /* IAMSUID */
13281fa4 2971
b28d0864
NIS
2972 if (PL_euid) { /* oops, we're not the setuid root perl */
2973 (void)PerlIO_close(PL_rsfp);
13281fa4 2974#ifndef IAMSUID
46fc3d4c 2975 /* try again */
a7cb1f99 2976 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
2977 (int)PERL_REVISION, (int)PERL_VERSION,
2978 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 2979#endif
cea2e8a9 2980 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
2981 }
2982
b28d0864 2983 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 2984#ifdef HAS_SETEGID
b28d0864 2985 (void)setegid(PL_statbuf.st_gid);
a687059c 2986#else
fe14fcc3 2987#ifdef HAS_SETREGID
b28d0864 2988 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW
2989#else
2990#ifdef HAS_SETRESGID
b28d0864 2991 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 2992#else
b28d0864 2993 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW
2994#endif
2995#endif
85e6fe83 2996#endif
b28d0864 2997 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 2998 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 2999 }
b28d0864
NIS
3000 if (PL_statbuf.st_mode & S_ISUID) {
3001 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3002#ifdef HAS_SETEUID
b28d0864 3003 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3004#else
fe14fcc3 3005#ifdef HAS_SETREUID
b28d0864 3006 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW
3007#else
3008#ifdef HAS_SETRESUID
b28d0864 3009 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3010#else
b28d0864 3011 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW
3012#endif
3013#endif
85e6fe83 3014#endif
b28d0864 3015 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3016 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3017 }
b28d0864 3018 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3019#ifdef HAS_SETEUID
b28d0864 3020 (void)seteuid((Uid_t)PL_uid);
a687059c 3021#else
fe14fcc3 3022#ifdef HAS_SETREUID
b28d0864 3023 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3024#else
85e6fe83 3025#ifdef HAS_SETRESUID
b28d0864 3026 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3027#else
b28d0864 3028 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3029#endif
a687059c
LW
3030#endif
3031#endif
b28d0864 3032 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3033 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3034 }
748a9306 3035 init_ids();
b28d0864 3036 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3037 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW
3038 }
3039#ifdef IAMSUID
6b88bc9c 3040 else if (PL_preprocess)
cea2e8a9 3041 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3042 else if (fdscript >= 0)
cea2e8a9 3043 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3044 else
cea2e8a9 3045 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb
PP
3046
3047 /* We absolutely must clear out any saved ids here, so we */
3048 /* exec the real perl, substituting fd script for scriptname. */
3049 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS
3050 PerlIO_rewind(PL_rsfp);
3051 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS
3052 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3053 if (!PL_origargv[which])
cea2e8a9
GS
3054 Perl_croak(aTHX_ "Permission denied");
3055 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3056 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3057#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3058 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3059#endif
a7cb1f99 3060 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3061 (int)PERL_REVISION, (int)PERL_VERSION,
3062 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3063 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3064#endif /* IAMSUID */
a687059c 3065#else /* !DOSUID */
3280af22 3066 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3067#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS
3068 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3069 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3070 ||
b28d0864 3071 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3072 )
b28d0864 3073 if (!PL_do_undump)
cea2e8a9 3074 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3075FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3076#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3077 /* not set-id, must be wrapped */
a687059c 3078 }
13281fa4 3079#endif /* DOSUID */
79072805 3080}
13281fa4 3081
76e3520e 3082STATIC void
cea2e8a9 3083S_find_beginning(pTHX)
79072805 3084{
6e72f9df 3085 register char *s, *s2;
33b78306
LW
3086
3087 /* skip forward in input to the real script? */
3088
bbce6d69 3089 forbid_setid("-x");
bf4acbe4 3090#ifdef MACOS_TRADITIONAL
084592ab 3091 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3092
bf4acbe4
GS
3093 while (PL_doextract || gMacPerl_AlwaysExtract) {
3094 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3095 if (!gMacPerl_AlwaysExtract)
3096 Perl_croak(aTHX_ "No Perl script found in input\n");
3097
3098 if (PL_doextract) /* require explicit override ? */
3099 if (!OverrideExtract(PL_origfilename))
3100 Perl_croak(aTHX_ "User aborted script\n");
3101 else
3102 PL_doextract = FALSE;
3103
3104 /* Pater peccavi, file does not have #! */
3105 PerlIO_rewind(PL_rsfp);
ac27b0f5 3106
bf4acbe4
GS
3107 break;
3108 }
3109#else
3280af22
NIS
3110 while (PL_doextract) {
3111 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3112 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3113#endif
6e72f9df 3114 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
3280af22
NIS
3115 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3116 PL_doextract = FALSE;
6e72f9df
PP
3117 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3118 s2 = s;
3119 while (*s == ' ' || *s == '\t') s++;
3120 if (*s++ == '-') {
3121 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3122 if (strnEQ(s2-4,"perl",4))
3123 /*SUPPRESS 530*/
155aba94
GS
3124 while ((s = moreswitches(s)))
3125 ;
33b78306 3126 }
83025b21
LW
3127 }
3128 }
3129}
3130
afe37c7d 3131
76e3520e 3132STATIC void
cea2e8a9 3133S_init_ids(pTHX)
352d5a3a 3134{
d8eceb89
JH
3135 PL_uid = PerlProc_getuid();
3136 PL_euid = PerlProc_geteuid();
3137 PL_gid = PerlProc_getgid();
3138 PL_egid = PerlProc_getegid();
748a9306 3139#ifdef VMS
b28d0864
NIS
3140 PL_uid |= PL_gid << 16;
3141 PL_euid |= PL_egid << 16;
748a9306 3142#endif
3280af22 3143 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3144}
79072805 3145
76e3520e 3146STATIC void
cea2e8a9 3147S_forbid_setid(pTHX_ char *s)
bbce6d69 3148{
3280af22 3149 if (PL_euid != PL_uid)
cea2e8a9 3150 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3151 if (PL_egid != PL_gid)
cea2e8a9 3152 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69
PP
3153}
3154
1ee4443e
IZ
3155void
3156Perl_init_debugger(pTHX)
748a9306 3157{
1ee4443e
IZ
3158 HV *ostash = PL_curstash;
3159
3280af22
NIS
3160 PL_curstash = PL_debstash;
3161 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3162 AvREAL_off(PL_dbargs);
3163 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3164 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3165 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3166 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3167 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3168 sv_setiv(PL_DBsingle, 0);
3280af22 3169 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3170 sv_setiv(PL_DBtrace, 0);
3280af22 3171 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3172 sv_setiv(PL_DBsignal, 0);
1ee4443e 3173 PL_curstash = ostash;
352d5a3a
LW
3174}
3175
2ce36478
SM
3176#ifndef STRESS_REALLOC
3177#define REASONABLE(size) (size)
3178#else
3179#define REASONABLE(size) (1) /* unreasonable */
3180#endif
3181
11343788 3182void
cea2e8a9 3183Perl_init_stacks(pTHX)
79072805 3184{
e336de0d 3185 /* start with 128-item stack and 8K cxstack */
3280af22 3186 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3187 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS
3188 PL_curstackinfo->si_type = PERLSI_MAIN;
3189 PL_curstack = PL_curstackinfo->si_stack;
3190 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3191
3280af22
NIS
3192 PL_stack_base = AvARRAY(PL_curstack);
3193 PL_stack_sp = PL_stack_base;
3194 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3195
3280af22
NIS
3196 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3197 PL_tmps_floor = -1;
3198 PL_tmps_ix = -1;
3199 PL_tmps_max = REASONABLE(128);
8990e307 3200
3280af22
NIS
3201 New(54,PL_markstack,REASONABLE(32),I32);
3202 PL_markstack_ptr = PL_markstack;
3203 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3204
ce2f7c3b 3205 SET_MARK_OFFSET;
e336de0d 3206
3280af22
NIS
3207 New(54,PL_scopestack,REASONABLE(32),I32);
3208 PL_scopestack_ix = 0;
3209 PL_scopestack_max = REASONABLE(32);
79072805 3210
3280af22
NIS
3211 New(54,PL_savestack,REASONABLE(128),ANY);
3212 PL_savestack_ix = 0;
3213 PL_savestack_max = REASONABLE(128);
79072805 3214
3280af22
NIS
3215 New(54,PL_retstack,REASONABLE(16),OP*);
3216 PL_retstack_ix = 0;
3217 PL_retstack_max = REASONABLE(16);
378cc40b 3218}
33b78306 3219
2ce36478
SM
3220#undef REASONABLE
3221
76e3520e 3222STATIC void
cea2e8a9 3223S_nuke_stacks(pTHX)
6e72f9df 3224{
3280af22
NIS
3225 while (PL_curstackinfo->si_next)
3226 PL_curstackinfo = PL_curstackinfo->si_next;
3227 while (PL_curstackinfo) {
3228 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3229 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS
3230 Safefree(PL_curstackinfo->si_cxstack);
3231 Safefree(PL_curstackinfo);
3232 PL_curstackinfo = p;
e336de0d 3233 }
3280af22
NIS
3234 Safefree(PL_tmps_stack);
3235 Safefree(PL_markstack);
3236 Safefree(PL_scopestack);
3237 Safefree(PL_savestack);
3238 Safefree(PL_retstack);
378cc40b 3239}
33b78306 3240
76e3520e 3241#ifndef PERL_OBJECT
760ac839 3242static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
76e3520e 3243#endif
7aa04957 3244
76e3520e 3245STATIC void
cea2e8a9 3246S_init_lexer(pTHX)
8990e307 3247{
76e3520e
GS
3248#ifdef PERL_OBJECT
3249 PerlIO *tmpfp;
3250#endif
3280af22
NIS
3251 tmpfp = PL_rsfp;
3252 PL_rsfp = Nullfp;
3253 lex_start(PL_linestr);
3254 PL_rsfp = tmpfp;
79cb57f6 3255 PL_subname = newSVpvn("main",4);
8990e307
LW
3256}
3257
76e3520e 3258STATIC void
cea2e8a9 3259S_init_predump_symbols(pTHX)
45d8adaa 3260{
93a17b20 3261 GV *tmpgv;
af8c498a 3262 IO *io;
79072805 3263
864dbfa3 3264 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS
3265 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3266 GvMULTI_on(PL_stdingv);
af8c498a 3267 io = GvIOp(PL_stdingv);
a04651f4 3268 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3269 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3270 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3271 GvMULTI_on(tmpgv);
af8c498a 3272 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3273
85e6fe83 3274 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3275 GvMULTI_on(tmpgv);
af8c498a 3276 io = GvIOp(tmpgv);
a04651f4 3277 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3278 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3279 setdefout(tmpgv);
adbc6bb1 3280 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
a5f75d66 3281 GvMULTI_on(tmpgv);
af8c498a 3282 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3283
bf49b057
GS
3284 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3285 GvMULTI_on(PL_stderrgv);
3286 io = GvIOp(PL_stderrgv);
a04651f4 3287 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3288 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
adbc6bb1 3289 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
a5f75d66 3290 GvMULTI_on(tmpgv);
af8c498a 3291 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3292
3280af22 3293 PL_statname = NEWSV(66,0); /* last filename we did stat on */
ab821d7f 3294
bf4acbe4
GS
3295 if (PL_osname)
3296 Safefree(PL_osname);
3297 PL_osname = savepv(OSNAME);
79072805 3298}
33b78306 3299
76e3520e 3300STATIC void
cea2e8a9 3301S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
33b78306 3302{
79072805
LW
3303 char *s;
3304 SV *sv;
3305 GV* tmpgv;
103a7189 3306 char **dup_env_base = 0;
9cbac4c7 3307#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
103a7189 3308 int dup_env_count = 0;
9cbac4c7 3309#endif
fe14fcc3 3310
79072805 3311 argc--,argv++; /* skip name of script */
3280af22 3312 if (PL_doswitches) {
79072805
LW
3313 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3314 if (!argv[0][1])
3315 break;
379d538a 3316 if (argv[0][1] == '-' && !argv[0][2]) {
79072805
LW
3317 argc--,argv++;
3318 break;
3319 }
155aba94 3320 if ((s = strchr(argv[0], '='))) {
79072805 3321 *s++ = '\0';
85e6fe83 3322 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
79072805
LW
3323 }
3324 else
85e6fe83 3325 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
fe14fcc3 3326 }
79072805 3327 }
3280af22
NIS
3328 PL_toptarget = NEWSV(0,0);
3329 sv_upgrade(PL_toptarget, SVt_PVFM);
3330 sv_setpvn(PL_toptarget, "", 0);
3331 PL_bodytarget = NEWSV(0,0);
3332 sv_upgrade(PL_bodytarget, SVt_PVFM);
3333 sv_setpvn(PL_bodytarget, "", 0);
3334 PL_formtarget = PL_bodytarget;
79072805 3335
bbce6d69 3336 TAINT;
155aba94 3337 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
bf4acbe4
GS
3338#ifdef MACOS_TRADITIONAL
3339 /* $0 is not majick on a Mac */
3340 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
3341#else
3280af22 3342 sv_setpv(GvSV(tmpgv),PL_origfilename);
79072805 3343 magicname("0", "0", 1);
bf4acbe4 3344#endif
79072805 3345 }
155aba94 3346 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV)))
ed344e4f 3347#ifdef OS2
23da6c43 3348 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
ed344e4f 3349#else
3280af22 3350 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
ed344e4f 3351#endif
155aba94 3352 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3280af22
NIS
3353 GvMULTI_on(PL_argvgv);
3354 (void)gv_AVadd(PL_argvgv);
3355 av_clear(GvAVn(PL_argvgv));
79072805 3356 for (; argc > 0; argc--,argv++) {
729a02f2
GS
3357 SV *sv = newSVpv(argv[0],0);
3358 av_push(GvAVn(PL_argvgv),sv);
3359 if (PL_widesyscalls)
e84ff256 3360 (void)sv_utf8_decode(sv);
79072805
LW
3361 }
3362 }
155aba94 3363 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
79072805 3364 HV *hv;
3280af22
NIS
3365 GvMULTI_on(PL_envgv);
3366 hv = GvHVn(PL_envgv);
65c50114 3367 hv_magic(hv, Nullgv, 'E');
fa6a1c44 3368#ifdef USE_ENVIRON_ARRAY
4633a7c4
LW
3369 /* Note that if the supplied env parameter is actually a copy
3370 of the global environ then it may now point to free'd memory
3371 if the environment has been modified since. To avoid this
3372 problem we treat env==NULL as meaning 'use the default'
3373 */
3374 if (!env)
3375 env = environ;
5aabfad6 3376 if (env != environ)
79072805 3377 environ[0] = Nullch;
103a7189
JH
3378#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
3379 {
3380 char **env_base;
9041c2e3 3381 for (env_base = env; *env; env++)
103a7189
JH
3382 dup_env_count++;
3383 if ((dup_env_base = (char **)
480bfd1e 3384 safesysmalloc( sizeof(char *) * (dup_env_count+1) ))) {
103a7189
JH
3385 char **dup_env;
3386 for (env = env_base, dup_env = dup_env_base;
3387 *env;
480bfd1e
JH
3388 env++, dup_env++) {
3389 /* With environ one needs to use safesysmalloc(). */
3390 *dup_env = safesysmalloc(strlen(*env) + 1);
3391 (void)strcpy(*dup_env, *env);
3392 }
103a7189
JH
3393 *dup_env = Nullch;
3394 env = dup_env_base;
3395 } /* else what? */
3396 }
3397#endif /* NEED_ENVIRON_DUP_FOR_MODIFY */
79072805 3398 for (; *env; env++) {
93a17b20 3399 if (!(s = strchr(*env,'=')))
79072805
LW
3400 continue;
3401 *s++ = '\0';
60ce6247 3402#if defined(MSDOS)
137443ea
PP
3403 (void)strupr(*env);
3404#endif
79072805
LW
3405 sv = newSVpv(s--,0);
3406 (void)hv_store(hv, *env, s - *env, sv, 0);
3407 *s = '=';
fe14fcc3 3408 }
480bfd1e 3409#ifdef NEED_ENVIRON_DUP_FOR_MODIFY
103a7189
JH
3410 if (dup_env_base) {
3411 char **dup_env;
3412 for (dup_env = dup_env_base; *dup_env; dup_env++)
480bfd1e
JH
3413 safesysfree(*dup_env);
3414 safesysfree(dup_env_base);
103a7189 3415 }
7e0f6a1f 3416#endif /* NEED_ENVIRON_DUP_FOR_MODIFY */
103a7189 3417#endif /* USE_ENVIRON_ARRAY */
4550b24a
PP
3418#ifdef DYNAMIC_ENV_FETCH
3419 HvNAME(hv) = savepv(ENV_HV_NAME);
3420#endif
79072805 3421 }
bbce6d69 3422 TAINT_NOT;
155aba94 3423 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV)))
7766f137 3424 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
33b78306 3425}
34de22dd 3426
76e3520e 3427STATIC void
cea2e8a9 3428S_init_perllib(pTHX)
34de22dd 3429{
85e6fe83 3430 char *s;
3280af22 3431 if (!PL_tainting) {
552a7a9b 3432#ifndef VMS
76e3520e 3433 s = PerlEnv_getenv("PERL5LIB");
85e6fe83 3434 if (s)
9c8a64f0 3435 incpush(s, TRUE, TRUE);
85e6fe83 3436 else
9c8a64f0 3437 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE);
552a7a9b
PP
3438#else /* VMS */
3439 /* Treat PERL5?LIB as a possible search list logical name -- the
3440 * "natural" VMS idiom for a Unix path string. We allow each
3441 * element to be a set of |-separated directories for compatibility.
3442 */
3443 char buf[256];
3444 int idx = 0;
3445 if (my_trnlnm("PERL5LIB",buf,0))
9c8a64f0 3446 do { incpush(buf,TRUE,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
552a7a9b 3447 else
9c8a64f0 3448 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE);
552a7a9b 3449#endif /* VMS */
85e6fe83 3450 }
34de22dd 3451
c90c0ff4 3452/* Use the ~-expanded versions of APPLLIB (undocumented),
65f19062