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[perl5.git] / perl.c
CommitLineData
a0d0e21e
LW		 1/* perl.c
2 *
4bb101f2
JH		 3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, by Larry Wall and others
a687059c 5 *
352d5a3a
LW		 6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
a687059c 8 *
8d063cd8
LW		 9 */
10
a0d0e21e
LW		 11/*
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
13 */
45d8adaa 14
378cc40b 15#include "EXTERN.h"
864dbfa3 16#define PERL_IN_PERL_C
378cc40b 17#include "perl.h"
e3321bb0 18#include "patchlevel.h" /* for local_patches */
378cc40b 19
011f1a1a
JH		 20#ifdef NETWARE
21#include "nwutil.h"
22char *nw_get_sitelib(const char *pl);
23#endif
24
df5cef82 25/* XXX If this causes problems, set i_unistd=undef in the hint file. */
a0d0e21e
LW		 26#ifdef I_UNISTD
27#include <unistd.h>
28#endif
a0d0e21e 29
5311654c
JH		 30#ifdef __BEOS__
31# define HZ 1000000
32#endif
33
34#ifndef HZ
35# ifdef CLK_TCK
36# define HZ CLK_TCK
37# else
38# define HZ 60
39# endif
40#endif
41
7114a2d2 42#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
20ce7b12 43char *getenv (char *); /* Usually in <stdlib.h> */
54310121 44#endif
45
acfe0abc 46static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
0cb96387 47
a687059c
LW		 48#ifdef IAMSUID
49#ifndef DOSUID
50#define DOSUID
51#endif
52#endif
378cc40b 53
a687059c
LW		 54#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
55#ifdef DOSUID
56#undef DOSUID
57#endif
58#endif
8d063cd8 59
3db8f154 60#if defined(USE_ITHREADS)
06d86050
GS		 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; \
7d4724a4 69 MUTEX_INIT(&PL_dollarzero_mutex); \
534825c4
GS		 70 } \
71 else { \
72 PERL_SET_THX(my_perl); \
06d86050 73 } \
06d86050 74 } STMT_END
3db8f154 75#else
06d86050
GS		 76# define INIT_TLS_AND_INTERP \
77 STMT_START { \
78 if (!PL_curinterp) { \
79 PERL_SET_INTERP(my_perl); \
80 } \
81 PERL_SET_THX(my_perl); \
82 } STMT_END
83# endif
06d86050 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;
32e30700
GS		 94 /* New() needs interpreter, so call malloc() instead */
95 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 96 INIT_TLS_AND_INTERP;
32e30700
GS		 97 Zero(my_perl, 1, PerlInterpreter);
98 PL_Mem = ipM;
7766f137
GS		 99 PL_MemShared = ipMS;
100 PL_MemParse = ipMP;
32e30700
GS		 101 PL_Env = ipE;
102 PL_StdIO = ipStd;
103 PL_LIO = ipLIO;
104 PL_Dir = ipD;
105 PL_Sock = ipS;
106 PL_Proc = ipP;
7766f137 107
32e30700
GS		 108 return my_perl;
109}
110#else
954c1994
GS		 111
112/*
ccfc67b7
JH		 113=head1 Embedding Functions
114
954c1994
GS		 115=for apidoc perl_alloc
116
117Allocates a new Perl interpreter. See L<perlembed>.
118
119=cut
120*/
121
93a17b20 122PerlInterpreter *
cea2e8a9 123perl_alloc(void)
79072805 124{
cea2e8a9 125 PerlInterpreter *my_perl;
35d7cf2c
JH		 126#ifdef USE_5005THREADS
127 dTHX;
128#endif
79072805 129
54aff467 130 /* New() needs interpreter, so call malloc() instead */
e8ee3774 131 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 132
06d86050 133 INIT_TLS_AND_INTERP;
dedcbb81 134 Zero(my_perl, 1, PerlInterpreter);
cea2e8a9 135 return my_perl;
79072805 136}
32e30700 137#endif /* PERL_IMPLICIT_SYS */
79072805 138
954c1994
GS		 139/*
140=for apidoc perl_construct
141
142Initializes a new Perl interpreter. See L<perlembed>.
143
144=cut
145*/
146
79072805 147void
0cb96387 148perl_construct(pTHXx)
79072805 149{
8990e307 150#ifdef MULTIPLICITY
54aff467 151 init_interp();
ac27b0f5 152 PL_perl_destruct_level = 1;
54aff467
GS		 153#else
154 if (PL_perl_destruct_level > 0)
155 init_interp();
156#endif
33f46ff6 157 /* Init the real globals (and main thread)? */
3280af22 158 if (!PL_linestr) {
14dd3ad8 159#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 160 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 161#endif
312caa8e 162
2aea9f8a
GS		 163 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
164
3280af22
NIS		 165 PL_linestr = NEWSV(65,79);
166 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 167
3280af22 168 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP		 169 /* set read-only and try to insure than we wont see REFCNT==0
170 very often */
171
3280af22
NIS		 172 SvREADONLY_on(&PL_sv_undef);
173 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 174
3280af22
NIS		 175 sv_setpv(&PL_sv_no,PL_No);
176 SvNV(&PL_sv_no);
177 SvREADONLY_on(&PL_sv_no);
178 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 179
3280af22
NIS		 180 sv_setpv(&PL_sv_yes,PL_Yes);
181 SvNV(&PL_sv_yes);
182 SvREADONLY_on(&PL_sv_yes);
183 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
6e72f9df 184 }
79072805 185
cea2e8a9 186 PL_sighandlerp = Perl_sighandler;
3280af22 187 PL_pidstatus = newHV();
79072805
LW		 188 }
189
8bfdd7d9 190 PL_rs = newSVpvn("\n", 1);
dc92893f 191
cea2e8a9 192 init_stacks();
79072805 193
748a9306 194 init_ids();
3280af22 195 PL_lex_state = LEX_NOTPARSING;
a5f75d66 196
312caa8e 197 JMPENV_BOOTSTRAP;
f86702cc 198 STATUS_ALL_SUCCESS;
199
0672f40e 200 init_i18nl10n(1);
36477c24 201 SET_NUMERIC_STANDARD();
0b5b802d 202
a7cb1f99
GS		 203 {
204 U8 *s;
205 PL_patchlevel = NEWSV(0,4);
155aba94 206 (void)SvUPGRADE(PL_patchlevel, SVt_PVNV);
a7cb1f99 207 if (PERL_REVISION > 127 || PERL_VERSION > 127 || PERL_SUBVERSION > 127)
806e7201 208 SvGROW(PL_patchlevel, UTF8_MAXLEN*3+1);
a7cb1f99 209 s = (U8*)SvPVX(PL_patchlevel);
9041c2e3
NIS		 210 /* Build version strings using "native" characters */
211 s = uvchr_to_utf8(s, (UV)PERL_REVISION);
212 s = uvchr_to_utf8(s, (UV)PERL_VERSION);
213 s = uvchr_to_utf8(s, (UV)PERL_SUBVERSION);
a7cb1f99
GS		 214 *s = '\0';
215 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
216 SvPOK_on(PL_patchlevel);
00d6e121
MB		 217 SvNVX(PL_patchlevel) = (NV)PERL_REVISION +
218 ((NV)PERL_VERSION / (NV)1000) +
219 ((NV)PERL_SUBVERSION / (NV)1000000);
a7cb1f99
GS		 220 SvNOK_on(PL_patchlevel); /* dual valued */
221 SvUTF8_on(PL_patchlevel);
222 SvREADONLY_on(PL_patchlevel);
223 }
79072805 224
ab821d7f 225#if defined(LOCAL_PATCH_COUNT)
3280af22 226 PL_localpatches = local_patches; /* For possible -v */
ab821d7f 227#endif
228
52853b95
GS		 229#ifdef HAVE_INTERP_INTERN
230 sys_intern_init();
231#endif
232
3a1ee7e8 233 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 234
3280af22
NIS		 235 PL_fdpid = newAV(); /* for remembering popen pids by fd */
236 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 237 PL_errors = newSVpvn("",0);
48c6b404 238 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
1f483ca1
JH		 239 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
240 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
1fcf4c12 241#ifdef USE_ITHREADS
13137afc
AB		 242 PL_regex_padav = newAV();
243 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
244 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 245#endif
e5dd39fc 246#ifdef USE_REENTRANT_API
59bd0823 247 Perl_reentrant_init(aTHX);
e5dd39fc 248#endif
3d47000e
AB		 249
250 /* Note that strtab is a rather special HV. Assumptions are made
251 about not iterating on it, and not adding tie magic to it.
252 It is properly deallocated in perl_destruct() */
253 PL_strtab = newHV();
254
3d47000e
AB		 255 HvSHAREKEYS_off(PL_strtab); /* mandatory */
256 hv_ksplit(PL_strtab, 512);
257
0631ea03
AB		 258#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
259 _dyld_lookup_and_bind
260 ("__environ", (unsigned long *) &environ_pointer, NULL);
261#endif /* environ */
262
263#ifdef USE_ENVIRON_ARRAY
264 PL_origenviron = environ;
265#endif
266
5311654c
JH		 267 /* Use sysconf(_SC_CLK_TCK) if available, if not
268 * available or if the sysconf() fails, use the HZ. */
269#if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK)
270 PL_clocktick = sysconf(_SC_CLK_TCK);
271 if (PL_clocktick <= 0)
272#endif
273 PL_clocktick = HZ;
274
081fc587
AB		 275 PL_stashcache = newHV();
276
504f80c1
JH		 277#if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
278 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0 */
279 {
d0d2ba8f
JH		 280 char *s = NULL;
281
ed085813 282 if (!PL_earlytaint)
d0d2ba8f 283 s = PerlEnv_getenv("PERL_HASH_SEED");
504f80c1
JH		 284 if (s)
285 while (isSPACE(*s)) s++;
286 if (s && isDIGIT(*s))
bf1e0190 287 PL_hash_seed = (UV)Atoul(s);
504f80c1
JH		 288#ifndef USE_HASH_SEED_EXPLICIT
289 else {
290 /* Compute a random seed */
291 (void)seedDrand01((Rand_seed_t)seed());
292 PL_srand_called = TRUE;
293 PL_hash_seed = (UV)(Drand01() * (NV)UV_MAX);
294#if RANDBITS < (UVSIZE * 8)
295 {
296 int skip = (UVSIZE * 8) - RANDBITS;
297 PL_hash_seed >>= skip;
298 /* The low bits might need extra help. */
299 PL_hash_seed += (UV)(Drand01() * ((1 << skip) - 1));
300 }
301#endif /* RANDBITS < (UVSIZE * 8) */
302 }
303#endif /* USE_HASH_SEED_EXPLICIT */
ed085813 304 if (!PL_earlytaint && (s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG")))
2191697e
JH		 305 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n",
306 PL_hash_seed);
504f80c1
JH		 307 }
308#endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
309
8990e307 310 ENTER;
79072805
LW		 311}
312
954c1994 313/*
62375a60
NIS		 314=for apidoc nothreadhook
315
316Stub that provides thread hook for perl_destruct when there are
317no threads.
318
319=cut
320*/
321
322int
4e9e3734 323Perl_nothreadhook(pTHX)
62375a60
NIS		 324{
325 return 0;
326}
327
328/*
954c1994
GS		 329=for apidoc perl_destruct
330
331Shuts down a Perl interpreter. See L<perlembed>.
332
333=cut
334*/
335
31d77e54 336int
0cb96387 337perl_destruct(pTHXx)
79072805 338{
7c474504 339 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 340 HV *hv;
4d1ff10f 341#ifdef USE_5005THREADS
cea2e8a9 342 dTHX;
4d1ff10f 343#endif /* USE_5005THREADS */
8990e307 344
7766f137
GS		 345 /* wait for all pseudo-forked children to finish */
346 PERL_WAIT_FOR_CHILDREN;
347
3280af22 348 destruct_level = PL_perl_destruct_level;
4633a7c4
LW		 349#ifdef DEBUGGING
350 {
351 char *s;
155aba94 352 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc 353 int i = atoi(s);
354 if (destruct_level < i)
355 destruct_level = i;
356 }
4633a7c4
LW		 357 }
358#endif
359
31d77e54
AB		 360
361 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB		 362 dJMPENV;
363 int x = 0;
364
365 JMPENV_PUSH(x);
366 if (PL_endav && !PL_minus_c)
367 call_list(PL_scopestack_ix, PL_endav);
368 JMPENV_POP;
26f423df 369 }
f3faeb53 370 LEAVE;
a0d0e21e
LW		 371 FREETMPS;
372
e00b64d4 373 /* Need to flush since END blocks can produce output */
f13a2bc0 374 my_fflush_all();
e00b64d4 375
62375a60
NIS		 376 if (CALL_FPTR(PL_threadhook)(aTHX)) {
377 /* Threads hook has vetoed further cleanup */
b47cad08 378 return STATUS_NATIVE_EXPORT;
62375a60
NIS		 379 }
380
ff0cee69 381 /* We must account for everything. */
382
383 /* Destroy the main CV and syntax tree */
3280af22 384 if (PL_main_root) {
3280af22
NIS		 385 op_free(PL_main_root);
386 PL_main_root = Nullop;
a0d0e21e 387 }
3280af22
NIS		 388 PL_curcop = &PL_compiling;
389 PL_main_start = Nullop;
390 SvREFCNT_dec(PL_main_cv);
391 PL_main_cv = Nullcv;
24d3c518 392 PL_dirty = TRUE;
ff0cee69 393
13621cfb
NIS		 394 /* Tell PerlIO we are about to tear things apart in case
395 we have layers which are using resources that should
396 be cleaned up now.
397 */
398
399 PerlIO_destruct(aTHX);
400
3280af22 401 if (PL_sv_objcount) {
a0d0e21e
LW		 402 /*
403 * Try to destruct global references. We do this first so that the
404 * destructors and destructees still exist. Some sv's might remain.
405 * Non-referenced objects are on their own.
406 */
a0d0e21e 407 sv_clean_objs();
8990e307
LW		 408 }
409
5cd24f17 410 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS		 411 SvREFCNT_dec(PL_warnhook);
412 PL_warnhook = Nullsv;
413 SvREFCNT_dec(PL_diehook);
414 PL_diehook = Nullsv;
5cd24f17 415
4b556e6c 416 /* call exit list functions */
3280af22 417 while (PL_exitlistlen-- > 0)
acfe0abc 418 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 419
3280af22 420 Safefree(PL_exitlist);
4b556e6c 421
1c4916e5
CB		 422 PL_exitlist = NULL;
423 PL_exitlistlen = 0;
424
a0d0e21e 425 if (destruct_level == 0){
8990e307 426
a0d0e21e 427 DEBUG_P(debprofdump());
ac27b0f5 428
56a2bab7
NIS		 429#if defined(PERLIO_LAYERS)
430 /* No more IO - including error messages ! */
431 PerlIO_cleanup(aTHX);
432#endif
433
a0d0e21e 434 /* The exit() function will do everything that needs doing. */
b47cad08 435 return STATUS_NATIVE_EXPORT;
a0d0e21e 436 }
5dd60ef7 437
551a8b83 438 /* jettison our possibly duplicated environment */
4b647fb0
DM		 439 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
440 * so we certainly shouldn't free it here
441 */
442#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
4efc5df6
GS		 443 if (environ != PL_origenviron
444#ifdef USE_ITHREADS
445 /* only main thread can free environ[0] contents */
446 && PL_curinterp == aTHX
447#endif
448 )
449 {
551a8b83
JH		 450 I32 i;
451
452 for (i = 0; environ[i]; i++)
4b420006 453 safesysfree(environ[i]);
0631ea03 454
4b420006
JH		 455 /* Must use safesysfree() when working with environ. */
456 safesysfree(environ);
551a8b83
JH		 457
458 environ = PL_origenviron;
459 }
460#endif
461
5f8cb046
DM		 462#ifdef USE_ITHREADS
463 /* the syntax tree is shared between clones
464 * so op_free(PL_main_root) only ReREFCNT_dec's
465 * REGEXPs in the parent interpreter
466 * we need to manually ReREFCNT_dec for the clones
467 */
468 {
469 I32 i = AvFILLp(PL_regex_padav) + 1;
470 SV **ary = AvARRAY(PL_regex_padav);
471
472 while (i) {
35061a7e 473 SV *resv = ary[--i];
ba89bb6e 474 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM		 475
476 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 477 /* this is PL_reg_curpm, already freed
35061a7e
DM		 478 * flag is set in regexec.c:S_regtry
479 */
480 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 481 }
1cc8b4c5
AB		 482 else if(SvREPADTMP(resv)) {
483 SvREPADTMP_off(resv);
484 }
35061a7e 485 else {
5f8cb046
DM		 486 ReREFCNT_dec(re);
487 }
488 }
489 }
490 SvREFCNT_dec(PL_regex_padav);
491 PL_regex_padav = Nullav;
492 PL_regex_pad = NULL;
493#endif
494
081fc587
AB		 495 SvREFCNT_dec((SV*) PL_stashcache);
496 PL_stashcache = NULL;
497
5f05dabc 498 /* loosen bonds of global variables */
499
3280af22
NIS		 500 if(PL_rsfp) {
501 (void)PerlIO_close(PL_rsfp);
502 PL_rsfp = Nullfp;
8ebc5c01 503 }
504
505 /* Filters for program text */
3280af22
NIS		 506 SvREFCNT_dec(PL_rsfp_filters);
507 PL_rsfp_filters = Nullav;
8ebc5c01 508
509 /* switches */
3280af22
NIS		 510 PL_preprocess = FALSE;
511 PL_minus_n = FALSE;
512 PL_minus_p = FALSE;
513 PL_minus_l = FALSE;
514 PL_minus_a = FALSE;
515 PL_minus_F = FALSE;
516 PL_doswitches = FALSE;
599cee73 517 PL_dowarn = G_WARN_OFF;
3280af22
NIS		 518 PL_doextract = FALSE;
519 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS		 520 PL_unsafe = FALSE;
521
522 Safefree(PL_inplace);
523 PL_inplace = Nullch;
a7cb1f99 524 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS		 525
526 if (PL_e_script) {
527 SvREFCNT_dec(PL_e_script);
528 PL_e_script = Nullsv;
8ebc5c01 529 }
530
531 /* magical thingies */
532
7889fe52
NIS		 533 SvREFCNT_dec(PL_ofs_sv); /* $, */
534 PL_ofs_sv = Nullsv;
5f05dabc 535
7889fe52
NIS		 536 SvREFCNT_dec(PL_ors_sv); /* $\ */
537 PL_ors_sv = Nullsv;
8ebc5c01 538
3280af22
NIS		 539 SvREFCNT_dec(PL_rs); /* $/ */
540 PL_rs = Nullsv;
dc92893f 541
d33b2eba
GS		 542 PL_multiline = 0; /* $* */
543 Safefree(PL_osname); /* $^O */
544 PL_osname = Nullch;
5f05dabc 545
3280af22
NIS		 546 SvREFCNT_dec(PL_statname);
547 PL_statname = Nullsv;
548 PL_statgv = Nullgv;
5f05dabc 549
8ebc5c01 550 /* defgv, aka *_ should be taken care of elsewhere */
551
8ebc5c01 552 /* clean up after study() */
3280af22
NIS		 553 SvREFCNT_dec(PL_lastscream);
554 PL_lastscream = Nullsv;
555 Safefree(PL_screamfirst);
556 PL_screamfirst = 0;
557 Safefree(PL_screamnext);
558 PL_screamnext = 0;
8ebc5c01 559
7d5ea4e7
GS		 560 /* float buffer */
561 Safefree(PL_efloatbuf);
562 PL_efloatbuf = Nullch;
563 PL_efloatsize = 0;
564
8ebc5c01 565 /* startup and shutdown function lists */
3280af22 566 SvREFCNT_dec(PL_beginav);
5a837c8f 567 SvREFCNT_dec(PL_beginav_save);
3280af22 568 SvREFCNT_dec(PL_endav);
7d30b5c4 569 SvREFCNT_dec(PL_checkav);
ece599bd 570 SvREFCNT_dec(PL_checkav_save);
3280af22
NIS		 571 SvREFCNT_dec(PL_initav);
572 PL_beginav = Nullav;
5a837c8f 573 PL_beginav_save = Nullav;
3280af22 574 PL_endav = Nullav;
7d30b5c4 575 PL_checkav = Nullav;
ece599bd 576 PL_checkav_save = Nullav;
3280af22 577 PL_initav = Nullav;
5618dfe8 578
8ebc5c01 579 /* shortcuts just get cleared */
3280af22 580 PL_envgv = Nullgv;
3280af22
NIS		 581 PL_incgv = Nullgv;
582 PL_hintgv = Nullgv;
583 PL_errgv = Nullgv;
584 PL_argvgv = Nullgv;
585 PL_argvoutgv = Nullgv;
586 PL_stdingv = Nullgv;
bf49b057 587 PL_stderrgv = Nullgv;
3280af22
NIS		 588 PL_last_in_gv = Nullgv;
589 PL_replgv = Nullgv;
5c831c24 590 PL_debstash = Nullhv;
8ebc5c01 591
592 /* reset so print() ends up where we expect */
593 setdefout(Nullgv);
5c831c24 594
7a1c5554
GS		 595 SvREFCNT_dec(PL_argvout_stack);
596 PL_argvout_stack = Nullav;
8ebc5c01 597
5c831c24
GS		 598 SvREFCNT_dec(PL_modglobal);
599 PL_modglobal = Nullhv;
600 SvREFCNT_dec(PL_preambleav);
601 PL_preambleav = Nullav;
602 SvREFCNT_dec(PL_subname);
603 PL_subname = Nullsv;
604 SvREFCNT_dec(PL_linestr);
605 PL_linestr = Nullsv;
606 SvREFCNT_dec(PL_pidstatus);
607 PL_pidstatus = Nullhv;
608 SvREFCNT_dec(PL_toptarget);
609 PL_toptarget = Nullsv;
610 SvREFCNT_dec(PL_bodytarget);
611 PL_bodytarget = Nullsv;
612 PL_formtarget = Nullsv;
613
d33b2eba 614 /* free locale stuff */
b9582b6a 615#ifdef USE_LOCALE_COLLATE
d33b2eba
GS		 616 Safefree(PL_collation_name);
617 PL_collation_name = Nullch;
b9582b6a 618#endif
d33b2eba 619
b9582b6a 620#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS		 621 Safefree(PL_numeric_name);
622 PL_numeric_name = Nullch;
a453c169 623 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 624#endif
d33b2eba 625
5c831c24
GS		 626 /* clear utf8 character classes */
627 SvREFCNT_dec(PL_utf8_alnum);
628 SvREFCNT_dec(PL_utf8_alnumc);
629 SvREFCNT_dec(PL_utf8_ascii);
630 SvREFCNT_dec(PL_utf8_alpha);
631 SvREFCNT_dec(PL_utf8_space);
632 SvREFCNT_dec(PL_utf8_cntrl);
633 SvREFCNT_dec(PL_utf8_graph);
634 SvREFCNT_dec(PL_utf8_digit);
635 SvREFCNT_dec(PL_utf8_upper);
636 SvREFCNT_dec(PL_utf8_lower);
637 SvREFCNT_dec(PL_utf8_print);
638 SvREFCNT_dec(PL_utf8_punct);
639 SvREFCNT_dec(PL_utf8_xdigit);
640 SvREFCNT_dec(PL_utf8_mark);
641 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 642 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 643 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 644 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH		 645 SvREFCNT_dec(PL_utf8_idstart);
646 SvREFCNT_dec(PL_utf8_idcont);
5c831c24
GS		 647 PL_utf8_alnum = Nullsv;
648 PL_utf8_alnumc = Nullsv;
649 PL_utf8_ascii = Nullsv;
650 PL_utf8_alpha = Nullsv;
651 PL_utf8_space = Nullsv;
652 PL_utf8_cntrl = Nullsv;
653 PL_utf8_graph = Nullsv;
654 PL_utf8_digit = Nullsv;
655 PL_utf8_upper = Nullsv;
656 PL_utf8_lower = Nullsv;
657 PL_utf8_print = Nullsv;
658 PL_utf8_punct = Nullsv;
659 PL_utf8_xdigit = Nullsv;
660 PL_utf8_mark = Nullsv;
661 PL_utf8_toupper = Nullsv;
662 PL_utf8_totitle = Nullsv;
663 PL_utf8_tolower = Nullsv;
b4e400f9 664 PL_utf8_tofold = Nullsv;
82686b01
JH		 665 PL_utf8_idstart = Nullsv;
666 PL_utf8_idcont = Nullsv;
5c831c24 667
971a9dd3
GS		 668 if (!specialWARN(PL_compiling.cop_warnings))
669 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 670 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS		 671 if (!specialCopIO(PL_compiling.cop_io))
672 SvREFCNT_dec(PL_compiling.cop_io);
673 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS		 674 CopFILE_free(&PL_compiling);
675 CopSTASH_free(&PL_compiling);
5c831c24 676
a0d0e21e 677 /* Prepare to destruct main symbol table. */
5f05dabc 678
3280af22
NIS		 679 hv = PL_defstash;
680 PL_defstash = 0;
a0d0e21e 681 SvREFCNT_dec(hv);
5c831c24
GS		 682 SvREFCNT_dec(PL_curstname);
683 PL_curstname = Nullsv;
a0d0e21e 684
5a844595
GS		 685 /* clear queued errors */
686 SvREFCNT_dec(PL_errors);
687 PL_errors = Nullsv;
688
a0d0e21e 689 FREETMPS;
0453d815 690 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 691 if (PL_scopestack_ix != 0)
9014280d 692 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 693 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS		 694 (long)PL_scopestack_ix);
695 if (PL_savestack_ix != 0)
9014280d 696 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 697 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS		 698 (long)PL_savestack_ix);
699 if (PL_tmps_floor != -1)
9014280d 700 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 701 (long)PL_tmps_floor + 1);
a0d0e21e 702 if (cxstack_ix != -1)
9014280d 703 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 704 (long)cxstack_ix + 1);
a0d0e21e 705 }
8990e307
LW		 706
707 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 708 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 709 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH		 710
711 /* the 2 is for PL_fdpid and PL_strtab */
712 while (PL_sv_count > 2 && sv_clean_all())
713 ;
714
d33b2eba
GS		 715 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
716 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS		 717 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
718 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 719
d4777f27
GS		 720 AvREAL_off(PL_fdpid); /* no surviving entries */
721 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS		 722 PL_fdpid = Nullav;
723
6c644e78
GS		 724#ifdef HAVE_INTERP_INTERN
725 sys_intern_clear();
726#endif
727
6e72f9df 728 /* Destruct the global string table. */
729 {
730 /* Yell and reset the HeVAL() slots that are still holding refcounts,
731 * so that sv_free() won't fail on them.
732 */
733 I32 riter;
734 I32 max;
735 HE *hent;
736 HE **array;
737
738 riter = 0;
3280af22
NIS		 739 max = HvMAX(PL_strtab);
740 array = HvARRAY(PL_strtab);
6e72f9df 741 hent = array[0];
742 for (;;) {
0453d815 743 if (hent && ckWARN_d(WARN_INTERNAL)) {
9014280d 744 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 745 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df 746 HeVAL(hent) - Nullsv, HeKEY(hent));
747 HeVAL(hent) = Nullsv;
748 hent = HeNEXT(hent);
749 }
750 if (!hent) {
751 if (++riter > max)
752 break;
753 hent = array[riter];
754 }
755 }
756 }
3280af22 757 SvREFCNT_dec(PL_strtab);
6e72f9df 758
e652bb2f 759#ifdef USE_ITHREADS
a0739874
DM		 760 /* free the pointer table used for cloning */
761 ptr_table_free(PL_ptr_table);
53186e96 762#endif
a0739874 763
d33b2eba
GS		 764 /* free special SVs */
765
766 SvREFCNT(&PL_sv_yes) = 0;
767 sv_clear(&PL_sv_yes);
768 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 769 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS		 770
771 SvREFCNT(&PL_sv_no) = 0;
772 sv_clear(&PL_sv_no);
773 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 774 SvFLAGS(&PL_sv_no) = 0;
01724ea0 775
9f375a43
DM		 776 {
777 int i;
778 for (i=0; i<=2; i++) {
779 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
780 sv_clear(PERL_DEBUG_PAD(i));
781 SvANY(PERL_DEBUG_PAD(i)) = NULL;
782 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
783 }
784 }
785
0453d815 786 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 787 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 788
eba0f806
DM		 789#ifdef DEBUG_LEAKING_SCALARS
790 if (PL_sv_count != 0) {
791 SV* sva;
792 SV* sv;
793 register SV* svend;
794
795 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
796 svend = &sva[SvREFCNT(sva)];
797 for (sv = sva + 1; sv < svend; ++sv) {
798 if (SvTYPE(sv) != SVTYPEMASK) {
799 PerlIO_printf(Perl_debug_log, "leaked: 0x%p\n", sv);
800 }
801 }
802 }
803 }
804#endif
805
806
56a2bab7 807#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS		 808 /* No more IO - including error messages ! */
809 PerlIO_cleanup(aTHX);
810#endif
811
9f4bd222
NIS		 812 /* sv_undef needs to stay immortal until after PerlIO_cleanup
813 as currently layers use it rather than Nullsv as a marker
814 for no arg - and will try and SvREFCNT_dec it.
815 */
816 SvREFCNT(&PL_sv_undef) = 0;
817 SvREADONLY_off(&PL_sv_undef);
818
3280af22 819 Safefree(PL_origfilename);
3280af22 820 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ		 821 if (PL_reg_curpm)
822 Safefree(PL_reg_curpm);
82ba1be6 823 Safefree(PL_reg_poscache);
dd28f7bb 824 free_tied_hv_pool();
3280af22 825 Safefree(PL_op_mask);
cf36064f
GS		 826 Safefree(PL_psig_ptr);
827 Safefree(PL_psig_name);
2c2666fc 828 Safefree(PL_bitcount);
ce08f86c 829 Safefree(PL_psig_pend);
6e72f9df 830 nuke_stacks();
3280af22 831 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 832
a0d0e21e 833 DEBUG_P(debprofdump());
d33b2eba 834
e5dd39fc 835#ifdef USE_REENTRANT_API
10bc17b6 836 Perl_reentrant_free(aTHX);
e5dd39fc
AB		 837#endif
838
612f20c3
GS		 839 sv_free_arenas();
840
fc36a67e 841 /* As the absolutely last thing, free the non-arena SV for mess() */
842
3280af22 843 if (PL_mess_sv) {
9c63abab
GS		 844 /* it could have accumulated taint magic */
845 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
846 MAGIC* mg;
847 MAGIC* moremagic;
848 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
849 moremagic = mg->mg_moremagic;
14befaf4
DM		 850 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
851 && mg->mg_len >= 0)
9c63abab
GS		 852 Safefree(mg->mg_ptr);
853 Safefree(mg);
854 }
855 }
fc36a67e 856 /* we know that type >= SVt_PV */
155aba94 857 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS		 858 Safefree(SvPVX(PL_mess_sv));
859 Safefree(SvANY(PL_mess_sv));
860 Safefree(PL_mess_sv);
861 PL_mess_sv = Nullsv;
fc36a67e 862 }
31d77e54 863 return STATUS_NATIVE_EXPORT;
79072805
LW		 864}
865
954c1994
GS		 866/*
867=for apidoc perl_free
868
869Releases a Perl interpreter. See L<perlembed>.
870
871=cut
872*/
873
79072805 874void
0cb96387 875perl_free(pTHXx)
79072805 876{
acfe0abc 877#if defined(WIN32) || defined(NETWARE)
ce3e5b80 878# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS		 879# ifdef NETWARE
880 void *host = nw_internal_host;
881# else
882 void *host = w32_internal_host;
883# endif
ce3e5b80 884 PerlMem_free(aTHXx);
acfe0abc 885# ifdef NETWARE
011f1a1a 886 nw_delete_internal_host(host);
acfe0abc
GS		 887# else
888 win32_delete_internal_host(host);
889# endif
1c0ca838
GS		 890# else
891 PerlMem_free(aTHXx);
892# endif
acfe0abc
GS		 893#else
894 PerlMem_free(aTHXx);
76e3520e 895#endif
79072805
LW		 896}
897
4b556e6c 898void
864dbfa3 899Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 900{
3280af22
NIS		 901 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
902 PL_exitlist[PL_exitlistlen].fn = fn;
903 PL_exitlist[PL_exitlistlen].ptr = ptr;
904 ++PL_exitlistlen;
4b556e6c
JD		 905}
906
954c1994
GS		 907/*
908=for apidoc perl_parse
909
910Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
911
912=cut
913*/
914
79072805 915int
0cb96387 916perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 917{
6224f72b 918 I32 oldscope;
6224f72b 919 int ret;
db36c5a1 920 dJMPENV;
4d1ff10f 921#ifdef USE_5005THREADS
cea2e8a9
GS		 922 dTHX;
923#endif
8d063cd8 924
a687059c
LW		 925#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
926#ifdef IAMSUID
927#undef IAMSUID
cea2e8a9 928 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW		 929setuid perl scripts securely.\n");
930#endif
931#endif
932
3280af22 933 PL_origargc = argc;
e2975953 934 PL_origargv = argv;
a0d0e21e 935
3280af22 936 if (PL_do_undump) {
a0d0e21e
LW		 937
938 /* Come here if running an undumped a.out. */
939
3280af22
NIS		 940 PL_origfilename = savepv(argv[0]);
941 PL_do_undump = FALSE;
a0d0e21e 942 cxstack_ix = -1; /* start label stack again */
748a9306 943 init_ids();
a0d0e21e
LW		 944 init_postdump_symbols(argc,argv,env);
945 return 0;
946 }
947
3280af22 948 if (PL_main_root) {
3280af22
NIS		 949 op_free(PL_main_root);
950 PL_main_root = Nullop;
ff0cee69 951 }
3280af22
NIS		 952 PL_main_start = Nullop;
953 SvREFCNT_dec(PL_main_cv);
954 PL_main_cv = Nullcv;
79072805 955
3280af22
NIS		 956 time(&PL_basetime);
957 oldscope = PL_scopestack_ix;
599cee73 958 PL_dowarn = G_WARN_OFF;
f86702cc 959
14dd3ad8
GS		 960#ifdef PERL_FLEXIBLE_EXCEPTIONS
961 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
962#else
963 JMPENV_PUSH(ret);
964#endif
6224f72b 965 switch (ret) {
312caa8e 966 case 0:
14dd3ad8
GS		 967#ifndef PERL_FLEXIBLE_EXCEPTIONS
968 parse_body(env,xsinit);
969#endif
7d30b5c4
GS		 970 if (PL_checkav)
971 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 972 ret = 0;
973 break;
6224f72b
GS		 974 case 1:
975 STATUS_ALL_FAILURE;
976 /* FALL THROUGH */
977 case 2:
978 /* my_exit() was called */
3280af22 979 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 980 LEAVE;
981 FREETMPS;
3280af22 982 PL_curstash = PL_defstash;
7d30b5c4
GS		 983 if (PL_checkav)
984 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 985 ret = STATUS_NATIVE_EXPORT;
986 break;
6224f72b 987 case 3:
bf49b057 988 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS		 989 ret = 1;
990 break;
6224f72b 991 }
14dd3ad8
GS		 992 JMPENV_POP;
993 return ret;
994}
995
996#ifdef PERL_FLEXIBLE_EXCEPTIONS
997STATIC void *
998S_vparse_body(pTHX_ va_list args)
999{
1000 char **env = va_arg(args, char**);
1001 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1002
1003 return parse_body(env, xsinit);
312caa8e 1004}
14dd3ad8 1005#endif
312caa8e
CS		 1006
1007STATIC void *
14dd3ad8 1008S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1009{
312caa8e
CS		 1010 int argc = PL_origargc;
1011 char **argv = PL_origargv;
312caa8e
CS		 1012 char *scriptname = NULL;
1013 int fdscript = -1;
1014 VOL bool dosearch = FALSE;
1015 char *validarg = "";
312caa8e
CS		 1016 register SV *sv;
1017 register char *s;
cf756827 1018 char *cddir = Nullch;
312caa8e 1019
3280af22 1020 sv_setpvn(PL_linestr,"",0);
79cb57f6 1021 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS		 1022 SAVEFREESV(sv);
1023 init_main_stash();
54310121 1024
6224f72b
GS		 1025 for (argc--,argv++; argc > 0; argc--,argv++) {
1026 if (argv[0][0] != '-' || !argv[0][1])
1027 break;
1028#ifdef DOSUID
1029 if (*validarg)
1030 validarg = " PHOOEY ";
1031 else
1032 validarg = argv[0];
13281fa4 1033#endif
6224f72b
GS		 1034 s = argv[0]+1;
1035 reswitch:
1036 switch (*s) {
729a02f2 1037 case 'C':
1d5472a9
GS		 1038#ifndef PERL_STRICT_CR
1039 case '\r':
1040#endif
6224f72b
GS		 1041 case ' ':
1042 case '0':
1043 case 'F':
1044 case 'a':
1045 case 'c':
1046 case 'd':
1047 case 'D':
1048 case 'h':
1049 case 'i':
1050 case 'l':
1051 case 'M':
1052 case 'm':
1053 case 'n':
1054 case 'p':
1055 case 's':
1056 case 'u':
1057 case 'U':
1058 case 'v':
599cee73
PM		 1059 case 'W':
1060 case 'X':
6224f72b 1061 case 'w':
06492da6 1062 case 'A':
155aba94 1063 if ((s = moreswitches(s)))
6224f72b
GS		 1064 goto reswitch;
1065 break;
33b78306 1066
1dbad523 1067 case 't':
22f7c9c9 1068 CHECK_MALLOC_TOO_LATE_FOR('t');
317ea90d
MS		 1069 if( !PL_tainting ) {
1070 PL_taint_warn = TRUE;
1071 PL_tainting = TRUE;
1072 }
1073 s++;
1074 goto reswitch;
6224f72b 1075 case 'T':
22f7c9c9 1076 CHECK_MALLOC_TOO_LATE_FOR('T');
3280af22 1077 PL_tainting = TRUE;
317ea90d 1078 PL_taint_warn = FALSE;
6224f72b
GS		 1079 s++;
1080 goto reswitch;
f86702cc 1081
6224f72b 1082 case 'e':
bf4acbe4
GS		 1083#ifdef MACOS_TRADITIONAL
1084 /* ignore -e for Dev:Pseudo argument */
1085 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
e55ac0fa 1086 break;
bf4acbe4 1087#endif
3280af22 1088 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1089 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1090 if (!PL_e_script) {
79cb57f6 1091 PL_e_script = newSVpvn("",0);
0cb96387 1092 filter_add(read_e_script, NULL);
6224f72b
GS		 1093 }
1094 if (*++s)
3280af22 1095 sv_catpv(PL_e_script, s);
6224f72b 1096 else if (argv[1]) {
3280af22 1097 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS		 1098 argc--,argv++;
1099 }
1100 else
cea2e8a9 1101 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1102 sv_catpv(PL_e_script, "\n");
6224f72b 1103 break;
afe37c7d 1104
6224f72b
GS		 1105 case 'I': /* -I handled both here and in moreswitches() */
1106 forbid_setid("-I");
1107 if (!*++s && (s=argv[1]) != Nullch) {
1108 argc--,argv++;
1109 }
6224f72b 1110 if (s && *s) {
0df16ed7
GS		 1111 char *p;
1112 STRLEN len = strlen(s);
1113 p = savepvn(s, len);
574c798a 1114 incpush(p, TRUE, TRUE, FALSE);
0df16ed7
GS		 1115 sv_catpvn(sv, "-I", 2);
1116 sv_catpvn(sv, p, len);
1117 sv_catpvn(sv, " ", 1);
6224f72b 1118 Safefree(p);
0df16ed7
GS		 1119 }
1120 else
a67e862a 1121 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS		 1122 break;
1123 case 'P':
1124 forbid_setid("-P");
3280af22 1125 PL_preprocess = TRUE;
6224f72b
GS		 1126 s++;
1127 goto reswitch;
1128 case 'S':
1129 forbid_setid("-S");
1130 dosearch = TRUE;
1131 s++;
1132 goto reswitch;
1133 case 'V':
3280af22
NIS		 1134 if (!PL_preambleav)
1135 PL_preambleav = newAV();
1136 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1137 if (*++s != ':') {
3280af22 1138 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1139#ifdef VMS
6b88bc9c 1140 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1141#else
3280af22 1142 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1143#endif
3280af22 1144 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1145# ifdef DEBUGGING
3280af22 1146 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1147# endif
6224f72b 1148# ifdef MULTIPLICITY
8f872242 1149 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1150# endif
4d1ff10f
AB		 1151# ifdef USE_5005THREADS
1152 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1153# endif
ac5e8965
JH		 1154# ifdef USE_ITHREADS
1155 sv_catpv(PL_Sv," USE_ITHREADS");
1156# endif
10cc9d2a
JH		 1157# ifdef USE_64_BIT_INT
1158 sv_catpv(PL_Sv," USE_64_BIT_INT");
1159# endif
1160# ifdef USE_64_BIT_ALL
1161 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH		 1162# endif
1163# ifdef USE_LONG_DOUBLE
1164 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1165# endif
53430762
JH		 1166# ifdef USE_LARGE_FILES
1167 sv_catpv(PL_Sv," USE_LARGE_FILES");
1168# endif
ac5e8965
JH		 1169# ifdef USE_SOCKS
1170 sv_catpv(PL_Sv," USE_SOCKS");
1171# endif
b363f7ed
GS		 1172# ifdef PERL_IMPLICIT_CONTEXT
1173 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1174# endif
1175# ifdef PERL_IMPLICIT_SYS
1176 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1177# endif
3280af22 1178 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1179
6224f72b
GS		 1180#if defined(LOCAL_PATCH_COUNT)
1181 if (LOCAL_PATCH_COUNT > 0) {
1182 int i;
3280af22 1183 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1184 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1185 if (PL_localpatches[i])
cea2e8a9 1186 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS		 1187 }
1188 }
1189#endif
cea2e8a9 1190 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS		 1191#ifdef __DATE__
1192# ifdef __TIME__
cea2e8a9 1193 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1194# else
cea2e8a9 1195 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS		 1196# endif
1197#endif
3280af22 1198 sv_catpv(PL_Sv, "; \
6224f72b 1199$\"=\"\\n \"; \
69fcd688
JH		 1200@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1201#ifdef __CYGWIN__
1202 sv_catpv(PL_Sv,"\
1203push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1204#endif
1205 sv_catpv(PL_Sv, "\
6224f72b
GS		 1206print \" \\%ENV:\\n @env\\n\" if @env; \
1207print \" \\@INC:\\n @INC\\n\";");
1208 }
1209 else {
3280af22
NIS		 1210 PL_Sv = newSVpv("config_vars(qw(",0);
1211 sv_catpv(PL_Sv, ++s);
1212 sv_catpv(PL_Sv, "))");
6224f72b
GS		 1213 s += strlen(s);
1214 }
3280af22 1215 av_push(PL_preambleav, PL_Sv);
6224f72b
GS		 1216 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1217 goto reswitch;
1218 case 'x':
3280af22 1219 PL_doextract = TRUE;
6224f72b
GS		 1220 s++;
1221 if (*s)
f4c556ac 1222 cddir = s;
6224f72b
GS		 1223 break;
1224 case 0:
1225 break;
1226 case '-':
1227 if (!*++s || isSPACE(*s)) {
1228 argc--,argv++;
1229 goto switch_end;
1230 }
1231 /* catch use of gnu style long options */
1232 if (strEQ(s, "version")) {
1233 s = "v";
1234 goto reswitch;
1235 }
1236 if (strEQ(s, "help")) {
1237 s = "h";
1238 goto reswitch;
1239 }
1240 s--;
1241 /* FALL THROUGH */
1242 default:
cea2e8a9 1243 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW		 1244 }
1245 }
6224f72b 1246 switch_end:
7f9e821f 1247 sv_setsv(get_sv("/", TRUE), PL_rs);
54310121 1248
f675dbe5
CB		 1249 if (
1250#ifndef SECURE_INTERNAL_GETENV
1251 !PL_tainting &&
1252#endif
cf756827 1253 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1254 {
cf756827 1255 char *popt = s;
74288ac8
GS		 1256 while (isSPACE(*s))
1257 s++;
317ea90d 1258 if (*s == '-' && *(s+1) == 'T') {
22f7c9c9 1259 CHECK_MALLOC_TOO_LATE_FOR('T');
74288ac8 1260 PL_tainting = TRUE;
317ea90d
MS		 1261 PL_taint_warn = FALSE;
1262 }
74288ac8 1263 else {
cf756827 1264 char *popt_copy = Nullch;
74288ac8 1265 while (s && *s) {
4ea8f8fb 1266 char *d;
74288ac8
GS		 1267 while (isSPACE(*s))
1268 s++;
1269 if (*s == '-') {
1270 s++;
1271 if (isSPACE(*s))
1272 continue;
1273 }
4ea8f8fb 1274 d = s;
74288ac8
GS		 1275 if (!*s)
1276 break;
06492da6 1277 if (!strchr("DIMUdmtwA", *s))
cea2e8a9 1278 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS		 1279 while (++s && *s) {
1280 if (isSPACE(*s)) {
cf756827
GS		 1281 if (!popt_copy) {
1282 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1283 s = popt_copy + (s - popt);
1284 d = popt_copy + (d - popt);
1285 }
4ea8f8fb
MS		 1286 *s++ = '\0';
1287 break;
1288 }
1289 }
1c4db469 1290 if (*d == 't') {
317ea90d
MS		 1291 if( !PL_tainting ) {
1292 PL_taint_warn = TRUE;
1293 PL_tainting = TRUE;
1294 }
1c4db469
RGS		 1295 } else {
1296 moreswitches(d);
1297 }
6224f72b 1298 }
6224f72b
GS		 1299 }
1300 }
a0d0e21e 1301
317ea90d
MS		 1302 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1303 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1304 }
1305
6224f72b
GS		 1306 if (!scriptname)
1307 scriptname = argv[0];
3280af22 1308 if (PL_e_script) {
6224f72b
GS		 1309 argc++,argv--;
1310 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1311 }
1312 else if (scriptname == Nullch) {
1313#ifdef MSDOS
1314 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1315 moreswitches("h");
1316#endif
1317 scriptname = "-";
1318 }
1319
1320 init_perllib();
1321
1322 open_script(scriptname,dosearch,sv,&fdscript);
1323
1324 validate_suid(validarg, scriptname,fdscript);
1325
64ca3a65 1326#ifndef PERL_MICRO
0b5b802d
GS		 1327#if defined(SIGCHLD) || defined(SIGCLD)
1328 {
1329#ifndef SIGCHLD
1330# define SIGCHLD SIGCLD
1331#endif
1332 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1333 if (sigstate == SIG_IGN) {
1334 if (ckWARN(WARN_SIGNAL))
9014280d 1335 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
0b5b802d
GS		 1336 "Can't ignore signal CHLD, forcing to default");
1337 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1338 }
1339 }
1340#endif
64ca3a65 1341#endif
0b5b802d 1342
bf4acbe4
GS		 1343#ifdef MACOS_TRADITIONAL
1344 if (PL_doextract || gMacPerl_AlwaysExtract) {
1345#else
f4c556ac 1346 if (PL_doextract) {
bf4acbe4 1347#endif
6224f72b 1348 find_beginning();
f4c556ac
GS		 1349 if (cddir && PerlDir_chdir(cddir) < 0)
1350 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1351
1352 }
6224f72b 1353
3280af22
NIS		 1354 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1355 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1356 CvUNIQUE_on(PL_compcv);
1357
dd2155a4 1358 CvPADLIST(PL_compcv) = pad_new(0);
4d1ff10f 1359#ifdef USE_5005THREADS
533c011a
NIS		 1360 CvOWNER(PL_compcv) = 0;
1361 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1362 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1363#endif /* USE_5005THREADS */
6224f72b 1364
0c4f7ff0 1365 boot_core_PerlIO();
6224f72b 1366 boot_core_UNIVERSAL();
9a34ef1d 1367#ifndef PERL_MICRO
09bef843 1368 boot_core_xsutils();
9a34ef1d 1369#endif
6224f72b
GS		 1370
1371 if (xsinit)
acfe0abc 1372 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1373#ifndef PERL_MICRO
ed79a026 1374#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1375 init_os_extras();
6224f72b 1376#endif
64ca3a65 1377#endif
6224f72b 1378
29209bc5 1379#ifdef USE_SOCKS
1b9c9cf5
DH		 1380# ifdef HAS_SOCKS5_INIT
1381 socks5_init(argv[0]);
1382# else
29209bc5 1383 SOCKSinit(argv[0]);
1b9c9cf5 1384# endif
ac27b0f5 1385#endif
29209bc5 1386
6224f72b
GS		 1387 init_predump_symbols();
1388 /* init_postdump_symbols not currently designed to be called */
1389 /* more than once (ENV isn't cleared first, for example) */
1390 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1391 if (!PL_do_undump)
6224f72b
GS		 1392 init_postdump_symbols(argc,argv,env);
1393
a05d7ebb
JH		 1394 /* PL_unicode is turned on by -C or by $ENV{PERL_UNICODE}.
1395 * PL_utf8locale is conditionally turned on by
085a54d9 1396 * locale.c:Perl_init_i18nl10n() if the environment
a05d7ebb 1397 * look like the user wants to use UTF-8. */
06e66572
JH		 1398 if (PL_unicode) {
1399 /* Requires init_predump_symbols(). */
a05d7ebb 1400 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
06e66572
JH		 1401 IO* io;
1402 PerlIO* fp;
1403 SV* sv;
1404
a05d7ebb 1405 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
06e66572 1406 * and the default open disciplines. */
a05d7ebb
JH		 1407 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
1408 PL_stdingv && (io = GvIO(PL_stdingv)) &&
1409 (fp = IoIFP(io)))
1410 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1411 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
1412 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
1413 (fp = IoOFP(io)))
1414 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1415 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
1416 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
1417 (fp = IoOFP(io)))
1418 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1419 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
1420 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1421 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
1422 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
1423 if (in) {
1424 if (out)
1425 sv_setpvn(sv, ":utf8\0:utf8", 11);
1426 else
1427 sv_setpvn(sv, ":utf8\0", 6);
1428 }
1429 else if (out)
1430 sv_setpvn(sv, "\0:utf8", 6);
1431 SvSETMAGIC(sv);
1432 }
b310b053
JH		 1433 }
1434 }
1435
4ffa73a3
JH		 1436 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
1437 if (strEQ(s, "unsafe"))
1438 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
1439 else if (strEQ(s, "safe"))
1440 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
1441 else
1442 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
1443 }
1444
6224f72b
GS		 1445 init_lexer();
1446
1447 /* now parse the script */
1448
93189314 1449 SETERRNO(0,SS_NORMAL);
3280af22 1450 PL_error_count = 0;
bf4acbe4
GS		 1451#ifdef MACOS_TRADITIONAL
1452 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1453 if (PL_minus_c)
1454 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1455 else {
1456 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1457 MacPerl_MPWFileName(PL_origfilename));
1458 }
1459 }
1460#else
3280af22
NIS		 1461 if (yyparse() || PL_error_count) {
1462 if (PL_minus_c)
cea2e8a9 1463 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1464 else {
cea2e8a9 1465 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1466 PL_origfilename);
6224f72b
GS		 1467 }
1468 }
bf4acbe4 1469#endif
57843af0 1470 CopLINE_set(PL_curcop, 0);
3280af22
NIS		 1471 PL_curstash = PL_defstash;
1472 PL_preprocess = FALSE;
1473 if (PL_e_script) {
1474 SvREFCNT_dec(PL_e_script);
1475 PL_e_script = Nullsv;
6224f72b
GS		 1476 }
1477
3280af22 1478 if (PL_do_undump)
6224f72b
GS		 1479 my_unexec();
1480
57843af0
GS		 1481 if (isWARN_ONCE) {
1482 SAVECOPFILE(PL_curcop);
1483 SAVECOPLINE(PL_curcop);
3280af22 1484 gv_check(PL_defstash);
57843af0 1485 }
6224f72b
GS		 1486
1487 LEAVE;
1488 FREETMPS;
1489
1490#ifdef MYMALLOC
1491 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1492 dump_mstats("after compilation:");
1493#endif
1494
1495 ENTER;
3280af22 1496 PL_restartop = 0;
312caa8e 1497 return NULL;
6224f72b
GS		 1498}
1499
954c1994
GS		 1500/*
1501=for apidoc perl_run
1502
1503Tells a Perl interpreter to run. See L<perlembed>.
1504
1505=cut
1506*/
1507
6224f72b 1508int
0cb96387 1509perl_run(pTHXx)
6224f72b 1510{
6224f72b 1511 I32 oldscope;
14dd3ad8 1512 int ret = 0;
db36c5a1 1513 dJMPENV;
4d1ff10f 1514#ifdef USE_5005THREADS
cea2e8a9
GS		 1515 dTHX;
1516#endif
6224f72b 1517
3280af22 1518 oldscope = PL_scopestack_ix;
96e176bf
CL		 1519#ifdef VMS
1520 VMSISH_HUSHED = 0;
1521#endif
6224f72b 1522
14dd3ad8 1523#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1524 redo_body:
14dd3ad8
GS		 1525 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1526#else
1527 JMPENV_PUSH(ret);
1528#endif
6224f72b
GS		 1529 switch (ret) {
1530 case 1:
1531 cxstack_ix = -1; /* start context stack again */
312caa8e 1532 goto redo_body;
14dd3ad8
GS		 1533 case 0: /* normal completion */
1534#ifndef PERL_FLEXIBLE_EXCEPTIONS
1535 redo_body:
1536 run_body(oldscope);
1537#endif
1538 /* FALL THROUGH */
1539 case 2: /* my_exit() */
3280af22 1540 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1541 LEAVE;
1542 FREETMPS;
3280af22 1543 PL_curstash = PL_defstash;
3a1ee7e8 1544 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB		 1545 PL_endav && !PL_minus_c)
1546 call_list(oldscope, PL_endav);
6224f72b
GS		 1547#ifdef MYMALLOC
1548 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1549 dump_mstats("after execution: ");
1550#endif
14dd3ad8
GS		 1551 ret = STATUS_NATIVE_EXPORT;
1552 break;
6224f72b 1553 case 3:
312caa8e
CS		 1554 if (PL_restartop) {
1555 POPSTACK_TO(PL_mainstack);
1556 goto redo_body;
6224f72b 1557 }
bf49b057 1558 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1559 FREETMPS;
14dd3ad8
GS		 1560 ret = 1;
1561 break;
6224f72b
GS		 1562 }
1563
14dd3ad8
GS		 1564 JMPENV_POP;
1565 return ret;
312caa8e
CS		 1566}
1567
14dd3ad8 1568#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1569STATIC void *
14dd3ad8 1570S_vrun_body(pTHX_ va_list args)
312caa8e 1571{
312caa8e
CS		 1572 I32 oldscope = va_arg(args, I32);
1573
14dd3ad8
GS		 1574 return run_body(oldscope);
1575}
1576#endif
1577
1578
1579STATIC void *
1580S_run_body(pTHX_ I32 oldscope)
1581{
6224f72b 1582 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1583 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1584
3280af22 1585 if (!PL_restartop) {
6224f72b
GS		 1586 DEBUG_x(dump_all());
1587 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH		 1588 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1589 PTR2UV(thr)));
6224f72b 1590
3280af22 1591 if (PL_minus_c) {
bf4acbe4 1592#ifdef MACOS_TRADITIONAL
e69a2255
JH		 1593 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
1594 (gMacPerl_ErrorFormat ? "# " : ""),
1595 MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1596#else
bf49b057 1597 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1598#endif
6224f72b
GS		 1599 my_exit(0);
1600 }
3280af22 1601 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1602 sv_setiv(PL_DBsingle, 1);
3280af22
NIS		 1603 if (PL_initav)
1604 call_list(oldscope, PL_initav);
6224f72b
GS		 1605 }
1606
1607 /* do it */
1608
3280af22 1609 if (PL_restartop) {
533c011a 1610 PL_op = PL_restartop;
3280af22 1611 PL_restartop = 0;
cea2e8a9 1612 CALLRUNOPS(aTHX);
6224f72b 1613 }
3280af22
NIS		 1614 else if (PL_main_start) {
1615 CvDEPTH(PL_main_cv) = 1;
533c011a 1616 PL_op = PL_main_start;
cea2e8a9 1617 CALLRUNOPS(aTHX);
6224f72b
GS		 1618 }
1619
f6b3007c
JH		 1620 my_exit(0);
1621 /* NOTREACHED */
312caa8e 1622 return NULL;
6224f72b
GS		 1623}
1624
954c1994 1625/*
ccfc67b7
JH		 1626=head1 SV Manipulation Functions
1627
954c1994
GS		 1628=for apidoc p||get_sv
1629
1630Returns the SV of the specified Perl scalar. If C<create> is set and the
1631Perl variable does not exist then it will be created. If C<create> is not
1632set and the variable does not exist then NULL is returned.
1633
1634=cut
1635*/
1636
6224f72b 1637SV*
864dbfa3 1638Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS		 1639{
1640 GV *gv;
4d1ff10f 1641#ifdef USE_5005THREADS
6224f72b
GS		 1642 if (name[1] == '\0' && !isALPHA(name[0])) {
1643 PADOFFSET tmp = find_threadsv(name);
411caa50 1644 if (tmp != NOT_IN_PAD)
6224f72b 1645 return THREADSV(tmp);
6224f72b 1646 }
4d1ff10f 1647#endif /* USE_5005THREADS */
6224f72b
GS		 1648 gv = gv_fetchpv(name, create, SVt_PV);
1649 if (gv)
1650 return GvSV(gv);
1651 return Nullsv;
1652}
1653
954c1994 1654/*
ccfc67b7
JH		 1655=head1 Array Manipulation Functions
1656
954c1994
GS		 1657=for apidoc p||get_av
1658
1659Returns the AV of the specified Perl array. If C<create> is set and the
1660Perl variable does not exist then it will be created. If C<create> is not
1661set and the variable does not exist then NULL is returned.
1662
1663=cut
1664*/
1665
6224f72b 1666AV*
864dbfa3 1667Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS		 1668{
1669 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1670 if (create)
1671 return GvAVn(gv);
1672 if (gv)
1673 return GvAV(gv);
1674 return Nullav;
1675}
1676
954c1994 1677/*
ccfc67b7
JH		 1678=head1 Hash Manipulation Functions
1679
954c1994
GS		 1680=for apidoc p||get_hv
1681
1682Returns the HV of the specified Perl hash. If C<create> is set and the
1683Perl variable does not exist then it will be created. If C<create> is not
1684set and the variable does not exist then NULL is returned.
1685
1686=cut
1687*/
1688
6224f72b 1689HV*
864dbfa3 1690Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1691{
a0d0e21e
LW		 1692 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1693 if (create)
1694 return GvHVn(gv);
1695 if (gv)
1696 return GvHV(gv);
1697 return Nullhv;
1698}
1699
954c1994 1700/*
ccfc67b7
JH		 1701=head1 CV Manipulation Functions
1702
954c1994
GS		 1703=for apidoc p||get_cv
1704
1705Returns the CV of the specified Perl subroutine. If C<create> is set and
1706the Perl subroutine does not exist then it will be declared (which has the
1707same effect as saying C<sub name;>). If C<create> is not set and the
1708subroutine does not exist then NULL is returned.
1709
1710=cut
1711*/
1712
a0d0e21e 1713CV*
864dbfa3 1714Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW		 1715{
1716 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1717 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS		 1718 /* XXX this is probably not what they think they're getting.
1719 * It has the same effect as "sub name;", i.e. just a forward
1720 * declaration! */
8ebc5c01 1721 if (create && !GvCVu(gv))
774d564b 1722 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1723 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1724 Nullop,
a0d0e21e
LW		 1725 Nullop);
1726 if (gv)
8ebc5c01 1727 return GvCVu(gv);
a0d0e21e
LW		 1728 return Nullcv;
1729}
1730
79072805
LW		 1731/* Be sure to refetch the stack pointer after calling these routines. */
1732
954c1994 1733/*
ccfc67b7
JH		 1734
1735=head1 Callback Functions
1736
954c1994
GS		 1737=for apidoc p||call_argv
1738
1739Performs a callback to the specified Perl sub. See L<perlcall>.
1740
1741=cut
1742*/
1743
a0d0e21e 1744I32
864dbfa3 1745Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1746
8ac85365
NIS		 1747 /* See G_* flags in cop.h */
1748 /* null terminated arg list */
8990e307 1749{
a0d0e21e 1750 dSP;
8990e307 1751
924508f0 1752 PUSHMARK(SP);
a0d0e21e 1753 if (argv) {
8990e307 1754 while (*argv) {
a0d0e21e 1755 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW		 1756 argv++;
1757 }
a0d0e21e 1758 PUTBACK;
8990e307 1759 }
864dbfa3 1760 return call_pv(sub_name, flags);
8990e307
LW		 1761}
1762
954c1994
GS		 1763/*
1764=for apidoc p||call_pv
1765
1766Performs a callback to the specified Perl sub. See L<perlcall>.
1767
1768=cut
1769*/
1770
a0d0e21e 1771I32
864dbfa3 1772Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS		 1773 /* name of the subroutine */
1774 /* See G_* flags in cop.h */
a0d0e21e 1775{
864dbfa3 1776 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW		 1777}
1778
954c1994
GS		 1779/*
1780=for apidoc p||call_method
1781
1782Performs a callback to the specified Perl method. The blessed object must
1783be on the stack. See L<perlcall>.
1784
1785=cut
1786*/
1787
a0d0e21e 1788I32
864dbfa3 1789Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS		 1790 /* name of the subroutine */
1791 /* See G_* flags in cop.h */
a0d0e21e 1792{
968b3946 1793 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW		 1794}
1795
1796/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS		 1797/*
1798=for apidoc p||call_sv
1799
1800Performs a callback to the Perl sub whose name is in the SV. See
1801L<perlcall>.
1802
1803=cut
1804*/
1805
a0d0e21e 1806I32
864dbfa3 1807Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1808 /* See G_* flags in cop.h */
a0d0e21e 1809{
924508f0 1810 dSP;
a0d0e21e 1811 LOGOP myop; /* fake syntax tree node */
968b3946 1812 UNOP method_op;
aa689395 1813 I32 oldmark;
13689cfe 1814 volatile I32 retval = 0;
a0d0e21e 1815 I32 oldscope;
54310121 1816 bool oldcatch = CATCH_GET;
6224f72b 1817 int ret;
533c011a 1818 OP* oldop = PL_op;
db36c5a1 1819 dJMPENV;
1e422769 1820
a0d0e21e
LW		 1821 if (flags & G_DISCARD) {
1822 ENTER;
1823 SAVETMPS;
1824 }
1825
aa689395 1826 Zero(&myop, 1, LOGOP);
54310121 1827 myop.op_next = Nullop;
f51d4af5 1828 if (!(flags & G_NOARGS))
aa689395 1829 myop.op_flags |= OPf_STACKED;
54310121 1830 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1831 (flags & G_ARRAY) ? OPf_WANT_LIST :
1832 OPf_WANT_SCALAR);
462e5cf6 1833 SAVEOP();
533c011a 1834 PL_op = (OP*)&myop;
aa689395 1835
3280af22
NIS		 1836 EXTEND(PL_stack_sp, 1);
1837 *++PL_stack_sp = sv;
aa689395 1838 oldmark = TOPMARK;
3280af22 1839 oldscope = PL_scopestack_ix;
a0d0e21e 1840
3280af22 1841 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1842 /* Handle first BEGIN of -d. */
3280af22 1843 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24 1844 /* Try harder, since this may have been a sighandler, thus
1845 * curstash may be meaningless. */
3280af22 1846 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1847 && !(flags & G_NODEBUG))
533c011a 1848 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1849
968b3946
GS		 1850 if (flags & G_METHOD) {
1851 Zero(&method_op, 1, UNOP);
1852 method_op.op_next = PL_op;
1853 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1854 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1855 PL_op = (OP*)&method_op;
968b3946
GS		 1856 }
1857
312caa8e 1858 if (!(flags & G_EVAL)) {
0cdb2077 1859 CATCH_SET(TRUE);
14dd3ad8 1860 call_body((OP*)&myop, FALSE);
312caa8e 1861 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1862 CATCH_SET(oldcatch);
312caa8e
CS		 1863 }
1864 else {
d78bda3d 1865 myop.op_other = (OP*)&myop;
3280af22 1866 PL_markstack_ptr--;
4633a7c4
LW		 1867 /* we're trying to emulate pp_entertry() here */
1868 {
c09156bb 1869 register PERL_CONTEXT *cx;
54310121 1870 I32 gimme = GIMME_V;
ac27b0f5 1871
4633a7c4
LW		 1872 ENTER;
1873 SAVETMPS;
ac27b0f5 1874
968b3946 1875 push_return(Nullop);
1d76a5c3 1876 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1877 PUSHEVAL(cx, 0, 0);
533c011a 1878 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1879
faef0170 1880 PL_in_eval = EVAL_INEVAL;
4633a7c4 1881 if (flags & G_KEEPERR)
faef0170 1882 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1883 else
38a03e6e 1884 sv_setpv(ERRSV,"");
4633a7c4 1885 }
3280af22 1886 PL_markstack_ptr++;
a0d0e21e 1887
14dd3ad8
GS		 1888#ifdef PERL_FLEXIBLE_EXCEPTIONS
1889 redo_body:
1890 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1891 (OP*)&myop, FALSE);
14dd3ad8
GS		 1892#else
1893 JMPENV_PUSH(ret);
1894#endif
6224f72b
GS		 1895 switch (ret) {
1896 case 0:
14dd3ad8
GS		 1897#ifndef PERL_FLEXIBLE_EXCEPTIONS
1898 redo_body:
1899 call_body((OP*)&myop, FALSE);
1900#endif
312caa8e
CS		 1901 retval = PL_stack_sp - (PL_stack_base + oldmark);
1902 if (!(flags & G_KEEPERR))
1903 sv_setpv(ERRSV,"");
a0d0e21e 1904 break;
6224f72b 1905 case 1:
f86702cc 1906 STATUS_ALL_FAILURE;
a0d0e21e 1907 /* FALL THROUGH */
6224f72b 1908 case 2:
a0d0e21e 1909 /* my_exit() was called */
3280af22 1910 PL_curstash = PL_defstash;
a0d0e21e 1911 FREETMPS;
14dd3ad8 1912 JMPENV_POP;
cc3604b1 1913 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1914 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1915 my_exit_jump();
a0d0e21e 1916 /* NOTREACHED */
6224f72b 1917 case 3:
3280af22 1918 if (PL_restartop) {
533c011a 1919 PL_op = PL_restartop;
3280af22 1920 PL_restartop = 0;
312caa8e 1921 goto redo_body;
a0d0e21e 1922 }
3280af22 1923 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1924 if (flags & G_ARRAY)
1925 retval = 0;
1926 else {
1927 retval = 1;
3280af22 1928 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1929 }
312caa8e 1930 break;
a0d0e21e 1931 }
a0d0e21e 1932
3280af22 1933 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW		 1934 SV **newsp;
1935 PMOP *newpm;
1936 I32 gimme;
c09156bb 1937 register PERL_CONTEXT *cx;
a0a2876f
LW		 1938 I32 optype;
1939
1940 POPBLOCK(cx,newpm);
1941 POPEVAL(cx);
1942 pop_return();
3280af22 1943 PL_curpm = newpm;
a0a2876f 1944 LEAVE;
a0d0e21e 1945 }
14dd3ad8 1946 JMPENV_POP;
a0d0e21e 1947 }
1e422769 1948
a0d0e21e 1949 if (flags & G_DISCARD) {
3280af22 1950 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1951 retval = 0;
1952 FREETMPS;
1953 LEAVE;
1954 }
533c011a 1955 PL_op = oldop;
a0d0e21e
LW		 1956 return retval;
1957}
1958
14dd3ad8 1959#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1960STATIC void *
14dd3ad8 1961S_vcall_body(pTHX_ va_list args)
312caa8e
CS		 1962{
1963 OP *myop = va_arg(args, OP*);
1964 int is_eval = va_arg(args, int);
1965
14dd3ad8 1966 call_body(myop, is_eval);
312caa8e
CS		 1967 return NULL;
1968}
14dd3ad8 1969#endif
312caa8e
CS		 1970
1971STATIC void
14dd3ad8 1972S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 1973{
312caa8e
CS		 1974 if (PL_op == myop) {
1975 if (is_eval)
f807eda9 1976 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 1977 else
f807eda9 1978 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS		 1979 }
1980 if (PL_op)
cea2e8a9 1981 CALLRUNOPS(aTHX);
312caa8e
CS		 1982}
1983
6e72f9df 1984/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 1985
954c1994
GS		 1986/*
1987=for apidoc p||eval_sv
1988
1989Tells Perl to C<eval> the string in the SV.
1990
1991=cut
1992*/
1993
a0d0e21e 1994I32
864dbfa3 1995Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 1996
8ac85365 1997 /* See G_* flags in cop.h */
a0d0e21e 1998{
924508f0 1999 dSP;
a0d0e21e 2000 UNOP myop; /* fake syntax tree node */
8fa7f367 2001 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 2002 volatile I32 retval = 0;
4633a7c4 2003 I32 oldscope;
6224f72b 2004 int ret;
533c011a 2005 OP* oldop = PL_op;
db36c5a1 2006 dJMPENV;
84902520 2007
4633a7c4
LW		 2008 if (flags & G_DISCARD) {
2009 ENTER;
2010 SAVETMPS;
2011 }
2012
462e5cf6 2013 SAVEOP();
533c011a
NIS		 2014 PL_op = (OP*)&myop;
2015 Zero(PL_op, 1, UNOP);
3280af22
NIS		 2016 EXTEND(PL_stack_sp, 1);
2017 *++PL_stack_sp = sv;
2018 oldscope = PL_scopestack_ix;
79072805 2019
4633a7c4
LW		 2020 if (!(flags & G_NOARGS))
2021 myop.op_flags = OPf_STACKED;
79072805 2022 myop.op_next = Nullop;
6e72f9df 2023 myop.op_type = OP_ENTEREVAL;
54310121 2024 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2025 (flags & G_ARRAY) ? OPf_WANT_LIST :
2026 OPf_WANT_SCALAR);
6e72f9df 2027 if (flags & G_KEEPERR)
2028 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2029
14dd3ad8 2030#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2031 redo_body:
14dd3ad8 2032 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2033 (OP*)&myop, TRUE);
14dd3ad8
GS		 2034#else
2035 JMPENV_PUSH(ret);
2036#endif
6224f72b
GS		 2037 switch (ret) {
2038 case 0:
14dd3ad8
GS		 2039#ifndef PERL_FLEXIBLE_EXCEPTIONS
2040 redo_body:
2041 call_body((OP*)&myop,TRUE);
2042#endif
312caa8e
CS		 2043 retval = PL_stack_sp - (PL_stack_base + oldmark);
2044 if (!(flags & G_KEEPERR))
2045 sv_setpv(ERRSV,"");
4633a7c4 2046 break;
6224f72b 2047 case 1:
f86702cc 2048 STATUS_ALL_FAILURE;
4633a7c4 2049 /* FALL THROUGH */
6224f72b 2050 case 2:
4633a7c4 2051 /* my_exit() was called */
3280af22 2052 PL_curstash = PL_defstash;
4633a7c4 2053 FREETMPS;
14dd3ad8 2054 JMPENV_POP;
cc3604b1 2055 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2056 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2057 my_exit_jump();
4633a7c4 2058 /* NOTREACHED */
6224f72b 2059 case 3:
3280af22 2060 if (PL_restartop) {
533c011a 2061 PL_op = PL_restartop;
3280af22 2062 PL_restartop = 0;
312caa8e 2063 goto redo_body;
4633a7c4 2064 }
3280af22 2065 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2066 if (flags & G_ARRAY)
2067 retval = 0;
2068 else {
2069 retval = 1;
3280af22 2070 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2071 }
312caa8e 2072 break;
4633a7c4
LW		 2073 }
2074
14dd3ad8 2075 JMPENV_POP;
4633a7c4 2076 if (flags & G_DISCARD) {
3280af22 2077 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2078 retval = 0;
2079 FREETMPS;
2080 LEAVE;
2081 }
533c011a 2082 PL_op = oldop;
4633a7c4
LW		 2083 return retval;
2084}
2085
954c1994
GS		 2086/*
2087=for apidoc p||eval_pv
2088
2089Tells Perl to C<eval> the given string and return an SV* result.
2090
2091=cut
2092*/
2093
137443ea 2094SV*
864dbfa3 2095Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 2096{
2097 dSP;
2098 SV* sv = newSVpv(p, 0);
2099
864dbfa3 2100 eval_sv(sv, G_SCALAR);
137443ea 2101 SvREFCNT_dec(sv);
2102
2103 SPAGAIN;
2104 sv = POPs;
2105 PUTBACK;
2106
2d8e6c8d
GS		 2107 if (croak_on_error && SvTRUE(ERRSV)) {
2108 STRLEN n_a;
cea2e8a9 2109 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2110 }
137443ea 2111
2112 return sv;
2113}
2114
4633a7c4
LW		 2115/* Require a module. */
2116
954c1994 2117/*
ccfc67b7
JH		 2118=head1 Embedding Functions
2119
954c1994
GS		 2120=for apidoc p||require_pv
2121
7d3fb230
BS		 2122Tells Perl to C<require> the file named by the string argument. It is
2123analogous to the Perl code C<eval "require '$file'">. It's even
2307c6d0 2124implemented that way; consider using load_module instead.
954c1994 2125
7d3fb230 2126=cut */
954c1994 2127
4633a7c4 2128void
864dbfa3 2129Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2130{
d3acc0f7
JP		 2131 SV* sv;
2132 dSP;
e788e7d3 2133 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP		 2134 PUTBACK;
2135 sv = sv_newmortal();
4633a7c4
LW		 2136 sv_setpv(sv, "require '");
2137 sv_catpv(sv, pv);
2138 sv_catpv(sv, "'");
864dbfa3 2139 eval_sv(sv, G_DISCARD);
d3acc0f7
JP		 2140 SPAGAIN;
2141 POPSTACK;
79072805
LW		 2142}
2143
79072805 2144void
864dbfa3 2145Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW		 2146{
2147 register GV *gv;
2148
155aba94 2149 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2150 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW		 2151}
2152
76e3520e 2153STATIC void
cea2e8a9 2154S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2155{
ab821d7f 2156 /* This message really ought to be max 23 lines.
75c72d73 2157 * Removed -h because the user already knows that option. Others? */
fb73857a 2158
76e3520e 2159 static char *usage_msg[] = {
fb73857a 2160"-0[octal] specify record separator (\\0, if no argument)",
2161"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2162"-C enable native wide character system interfaces",
1950ee41 2163"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS		 2164"-d[:debugger] run program under debugger",
2165"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2166"-e 'command' one line of program (several -e's allowed, omit programfile)",
2167"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2168"-i[extension] edit <> files in place (makes backup if extension supplied)",
2169"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2170"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS		 2171"-[mM][-]module execute `use/no module...' before executing program",
2172"-n assume 'while (<>) { ... }' loop around program",
2173"-p assume loop like -n but print line also, like sed",
2174"-P run program through C preprocessor before compilation",
2175"-s enable rudimentary parsing for switches after programfile",
2176"-S look for programfile using PATH environment variable",
2177"-T enable tainting checks",
9cbc33e8 2178"-t enable tainting warnings",
aac3bd0d 2179"-u dump core after parsing program",
fb73857a 2180"-U allow unsafe operations",
aac3bd0d
GS		 2181"-v print version, subversion (includes VERY IMPORTANT perl info)",
2182"-V[:variable] print configuration summary (or a single Config.pm variable)",
2183"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS		 2184"-W enable all warnings",
2185"-X disable all warnings",
fb73857a 2186"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2187"\n",
2188NULL
2189};
76e3520e 2190 char **p = usage_msg;
fb73857a 2191
b0e47665
GS		 2192 PerlIO_printf(PerlIO_stdout(),
2193 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2194 name);
fb73857a 2195 while (*p)
b0e47665 2196 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW		 2197}
2198
b4ab917c
DM		 2199/* convert a string of -D options (or digits) into an int.
2200 * sets *s to point to the char after the options */
2201
2202#ifdef DEBUGGING
2203int
2204Perl_get_debug_opts(pTHX_ char **s)
2205{
2206 int i = 0;
2207 if (isALPHA(**s)) {
2208 /* if adding extra options, remember to update DEBUG_MASK */
2209 static char debopts[] = "psltocPmfrxu HXDSTRJvC";
2210
2211 for (; isALNUM(**s); (*s)++) {
2212 char *d = strchr(debopts,**s);
2213 if (d)
2214 i |= 1 << (d - debopts);
2215 else if (ckWARN_d(WARN_DEBUGGING))
2216 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2217 "invalid option -D%c\n", **s);
2218 }
2219 }
2220 else {
2221 i = atoi(*s);
2222 for (; isALNUM(**s); (*s)++) ;
2223 }
2224# ifdef EBCDIC
2225 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2226 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2227 "-Dp not implemented on this platform\n");
2228# endif
2229 return i;
2230}
2231#endif
2232
79072805
LW		 2233/* This routine handles any switches that can be given during run */
2234
2235char *
864dbfa3 2236Perl_moreswitches(pTHX_ char *s)
79072805 2237{
ba210ebe 2238 STRLEN numlen;
84c133a0 2239 UV rschar;
79072805
LW		 2240
2241 switch (*s) {
2242 case '0':
a863c7d1 2243 {
f2095865
JH		 2244 I32 flags = 0;
2245
2246 SvREFCNT_dec(PL_rs);
2247 if (s[1] == 'x' && s[2]) {
2248 char *e;
2249 U8 *tmps;
2250
2251 for (s += 2, e = s; *e; e++);
2252 numlen = e - s;
2253 flags = PERL_SCAN_SILENT_ILLDIGIT;
2254 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2255 if (s + numlen < e) {
2256 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2257 numlen = 0;
2258 s--;
2259 }
2260 PL_rs = newSVpvn("", 0);
c5661c80 2261 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
f2095865
JH		 2262 tmps = (U8*)SvPVX(PL_rs);
2263 uvchr_to_utf8(tmps, rschar);
2264 SvCUR_set(PL_rs, UNISKIP(rschar));
2265 SvUTF8_on(PL_rs);
2266 }
2267 else {
2268 numlen = 4;
2269 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2270 if (rschar & ~((U8)~0))
2271 PL_rs = &PL_sv_undef;
2272 else if (!rschar && numlen >= 2)
2273 PL_rs = newSVpvn("", 0);
2274 else {
2275 char ch = (char)rschar;
2276 PL_rs = newSVpvn(&ch, 1);
2277 }
2278 }
2279 return s + numlen;
a863c7d1 2280 }
46487f74 2281 case 'C':
a05d7ebb
JH		 2282 s++;
2283 PL_unicode = parse_unicode_opts(&s);
46487f74 2284 return s;
2304df62 2285 case 'F':
3280af22 2286 PL_minus_F = TRUE;
ebce5377
RGS		 2287 PL_splitstr = ++s;
2288 while (*s && !isSPACE(*s)) ++s;
2289 *s = '\0';
2290 PL_splitstr = savepv(PL_splitstr);
2304df62 2291 return s;
79072805 2292 case 'a':
3280af22 2293 PL_minus_a = TRUE;
79072805
LW		 2294 s++;
2295 return s;
2296 case 'c':
3280af22 2297 PL_minus_c = TRUE;
79072805
LW		 2298 s++;
2299 return s;
2300 case 'd':
bbce6d69 2301 forbid_setid("-d");
4633a7c4 2302 s++;
70c94a19
RR		 2303 /* The following permits -d:Mod to accepts arguments following an =
2304 in the fashion that -MSome::Mod does. */
2305 if (*s == ':' || *s == '=') {
2306 char *start;
2307 SV *sv;
2308 sv = newSVpv("use Devel::", 0);
2309 start = ++s;
2310 /* We now allow -d:Module=Foo,Bar */
2311 while(isALNUM(*s) || *s==':') ++s;
2312 if (*s != '=')
2313 sv_catpv(sv, start);
2314 else {
2315 sv_catpvn(sv, start, s-start);
2316 sv_catpv(sv, " split(/,/,q{");
2317 sv_catpv(sv, ++s);
2318 sv_catpv(sv, "})");
2319 }
4633a7c4 2320 s += strlen(s);
70c94a19 2321 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2322 }
ed094faf 2323 if (!PL_perldb) {
3280af22 2324 PL_perldb = PERLDB_ALL;
a0d0e21e 2325 init_debugger();
ed094faf 2326 }
79072805
LW		 2327 return s;
2328 case 'D':
0453d815 2329 {
79072805 2330#ifdef DEBUGGING
bbce6d69 2331 forbid_setid("-D");
b4ab917c
DM		 2332 s++;
2333 PL_debug = get_debug_opts(&s) | DEBUG_TOP_FLAG;
12a43e32 2334#else /* !DEBUGGING */
0453d815 2335 if (ckWARN_d(WARN_DEBUGGING))
9014280d 2336 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
0453d815 2337 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2338 for (s++; isALNUM(*s); s++) ;
79072805
LW		 2339#endif
2340 /*SUPPRESS 530*/
2341 return s;
0453d815 2342 }
4633a7c4 2343 case 'h':
ac27b0f5 2344 usage(PL_origargv[0]);
7ca617d0 2345 my_exit(0);
79072805 2346 case 'i':
3280af22
NIS		 2347 if (PL_inplace)
2348 Safefree(PL_inplace);
c030f24b
GH		 2349#if defined(__CYGWIN__) /* do backup extension automagically */
2350 if (*(s+1) == '\0') {
2351 PL_inplace = savepv(".bak");
2352 return s+1;
2353 }
2354#endif /* __CYGWIN__ */
3280af22 2355 PL_inplace = savepv(s+1);
79072805 2356 /*SUPPRESS 530*/
3280af22 2357 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2358 if (*s) {
fb73857a 2359 *s++ = '\0';
7b8d334a
GS		 2360 if (*s == '-') /* Additional switches on #! line. */
2361 s++;
2362 }
fb73857a 2363 return s;
4e49a025 2364 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2365 forbid_setid("-I");
fb73857a 2366 ++s;
2367 while (*s && isSPACE(*s))
2368 ++s;
2369 if (*s) {
774d564b 2370 char *e, *p;
0df16ed7
GS		 2371 p = s;
2372 /* ignore trailing spaces (possibly followed by other switches) */
2373 do {
2374 for (e = p; *e && !isSPACE(*e); e++) ;
2375 p = e;
2376 while (isSPACE(*p))
2377 p++;
2378 } while (*p && *p != '-');
2379 e = savepvn(s, e-s);
574c798a 2380 incpush(e, TRUE, TRUE, FALSE);
0df16ed7
GS		 2381 Safefree(e);
2382 s = p;
2383 if (*s == '-')
2384 s++;
79072805
LW		 2385 }
2386 else
a67e862a 2387 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2388 return s;
79072805 2389 case 'l':
3280af22 2390 PL_minus_l = TRUE;
79072805 2391 s++;
7889fe52
NIS		 2392 if (PL_ors_sv) {
2393 SvREFCNT_dec(PL_ors_sv);
2394 PL_ors_sv = Nullsv;
2395 }
79072805 2396 if (isDIGIT(*s)) {
53305cf1 2397 I32 flags = 0;
7889fe52 2398 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC		 2399 numlen = 3 + (*s == '0');
2400 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW		 2401 s += numlen;
2402 }
2403 else {
8bfdd7d9 2404 if (RsPARA(PL_rs)) {
7889fe52
NIS		 2405 PL_ors_sv = newSVpvn("\n\n",2);
2406 }
2407 else {
8bfdd7d9 2408 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2409 }
79072805
LW		 2410 }
2411 return s;
06492da6
SF		 2412 case 'A':
2413 forbid_setid("-A");
930366bd
RGS		 2414 if (!PL_preambleav)
2415 PL_preambleav = newAV();
06492da6 2416 if (*++s) {
930366bd 2417 SV *sv = newSVpvn("use assertions::activate split(/,/,q{",37);
06492da6
SF		 2418 sv_catpv(sv,s);
2419 sv_catpv(sv,"})");
2420 s+=strlen(s);
06492da6
SF		 2421 av_push(PL_preambleav, sv);
2422 }
2423 else
930366bd 2424 av_push(PL_preambleav, newSVpvn("use assertions::activate",24));
06492da6 2425 return s;
1a30305b 2426 case 'M':
bbce6d69 2427 forbid_setid("-M"); /* XXX ? */
1a30305b 2428 /* FALL THROUGH */
2429 case 'm':
bbce6d69 2430 forbid_setid("-m"); /* XXX ? */
1a30305b 2431 if (*++s) {
a5f75d66 2432 char *start;
11343788 2433 SV *sv;
a5f75d66
AD		 2434 char *use = "use ";
2435 /* -M-foo == 'no foo' */
2436 if (*s == '-') { use = "no "; ++s; }
11343788 2437 sv = newSVpv(use,0);
a5f75d66 2438 start = s;
1a30305b 2439 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd 2440 while(isALNUM(*s) || *s==':') ++s;
2441 if (*s != '=') {
11343788 2442 sv_catpv(sv, start);
c07a80fd 2443 if (*(start-1) == 'm') {
2444 if (*s != '\0')
cea2e8a9 2445 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2446 sv_catpv( sv, " ()");
c07a80fd 2447 }
2448 } else {
6df41af2 2449 if (s == start)
be98fb35
GS		 2450 Perl_croak(aTHX_ "Module name required with -%c option",
2451 s[-1]);
11343788
MB		 2452 sv_catpvn(sv, start, s-start);
2453 sv_catpv(sv, " split(/,/,q{");
2454 sv_catpv(sv, ++s);
2455 sv_catpv(sv, "})");
c07a80fd 2456 }
1a30305b 2457 s += strlen(s);
5c831c24 2458 if (!PL_preambleav)
3280af22
NIS		 2459 PL_preambleav = newAV();
2460 av_push(PL_preambleav, sv);
1a30305b 2461 }
2462 else
cea2e8a9 2463 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2464 return s;
79072805 2465 case 'n':
3280af22 2466 PL_minus_n = TRUE;
79072805
LW		 2467 s++;
2468 return s;
2469 case 'p':
3280af22 2470 PL_minus_p = TRUE;
79072805
LW		 2471 s++;
2472 return s;
2473 case 's':
bbce6d69 2474 forbid_setid("-s");
3280af22 2475 PL_doswitches = TRUE;
79072805
LW		 2476 s++;
2477 return s;
6537fe72
MS		 2478 case 't':
2479 if (!PL_tainting)
22f7c9c9 2480 TOO_LATE_FOR('t');
6537fe72
MS		 2481 s++;
2482 return s;
463ee0b2 2483 case 'T':
3280af22 2484 if (!PL_tainting)
22f7c9c9 2485 TOO_LATE_FOR('T');
463ee0b2
LW		 2486 s++;
2487 return s;
79072805 2488 case 'u':
bf4acbe4
GS		 2489#ifdef MACOS_TRADITIONAL
2490 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2491#endif
3280af22 2492 PL_do_undump = TRUE;
79072805
LW		 2493 s++;
2494 return s;
2495 case 'U':
3280af22 2496 PL_unsafe = TRUE;
79072805
LW		 2497 s++;
2498 return s;
2499 case 'v':
8e9464f1 2500#if !defined(DGUX)
b0e47665 2501 PerlIO_printf(PerlIO_stdout(),
d2560b70 2502 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2503 PL_patchlevel, ARCHNAME));
8e9464f1
JH		 2504#else /* DGUX */
2505/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2506 PerlIO_printf(PerlIO_stdout(),
2507 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2508 PerlIO_printf(PerlIO_stdout(),
2509 Perl_form(aTHX_ " built under %s at %s %s\n",
2510 OSNAME, __DATE__, __TIME__));
2511 PerlIO_printf(PerlIO_stdout(),
2512 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2513 OSVERS));
8e9464f1
JH		 2514#endif /* !DGUX */
2515
fb73857a 2516#if defined(LOCAL_PATCH_COUNT)
2517 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS		 2518 PerlIO_printf(PerlIO_stdout(),
2519 "\n(with %d registered patch%s, "
2520 "see perl -V for more detail)",
2521 (int)LOCAL_PATCH_COUNT,
2522 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2523#endif
1a30305b 2524
b0e47665 2525 PerlIO_printf(PerlIO_stdout(),
4c79ee7a 2526 "\n\nCopyright 1987-2003, Larry Wall\n");
eae9c151
JH		 2527#ifdef MACOS_TRADITIONAL
2528 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2529 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 2530 "maintained by Chris Nandor\n");
eae9c151 2531#endif
79072805 2532#ifdef MSDOS
b0e47665
GS		 2533 PerlIO_printf(PerlIO_stdout(),
2534 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff 2535#endif
2536#ifdef DJGPP
b0e47665
GS		 2537 PerlIO_printf(PerlIO_stdout(),
2538 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2539 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2540#endif
79072805 2541#ifdef OS2
b0e47665
GS		 2542 PerlIO_printf(PerlIO_stdout(),
2543 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 2544 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2545#endif
79072805 2546#ifdef atarist
b0e47665
GS		 2547 PerlIO_printf(PerlIO_stdout(),
2548 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2549#endif
a3f9223b 2550#ifdef __BEOS__
b0e47665
GS		 2551 PerlIO_printf(PerlIO_stdout(),
2552 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2553#endif
1d84e8df 2554#ifdef MPE
b0e47665 2555 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2556 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2002\n");
1d84e8df 2557#endif
9d116dd7 2558#ifdef OEMVS
b0e47665
GS		 2559 PerlIO_printf(PerlIO_stdout(),
2560 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2561#endif
495c5fdc 2562#ifdef __VOS__
b0e47665 2563 PerlIO_printf(PerlIO_stdout(),
94efb9fb 2564 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 2565#endif
092bebab 2566#ifdef __OPEN_VM
b0e47665
GS		 2567 PerlIO_printf(PerlIO_stdout(),
2568 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2569#endif
a1a0e61e 2570#ifdef POSIX_BC
b0e47665
GS		 2571 PerlIO_printf(PerlIO_stdout(),
2572 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2573#endif
61ae2fbf 2574#ifdef __MINT__
b0e47665
GS		 2575 PerlIO_printf(PerlIO_stdout(),
2576 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2577#endif
f83d2536 2578#ifdef EPOC
b0e47665 2579 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2580 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 2581#endif
e1caacb4 2582#ifdef UNDER_CE
b475b3e6
JH		 2583 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
2584 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
e1caacb4
JH		 2585 wce_hitreturn();
2586#endif
baed7233
DL		 2587#ifdef BINARY_BUILD_NOTICE
2588 BINARY_BUILD_NOTICE;
2589#endif
b0e47665
GS		 2590 PerlIO_printf(PerlIO_stdout(),
2591 "\n\
79072805 2592Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2593GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS		 2594Complete documentation for Perl, including FAQ lists, should be found on\n\
2595this system using `man perl' or `perldoc perl'. If you have access to the\n\
2596Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
7ca617d0 2597 my_exit(0);
79072805 2598 case 'w':
599cee73 2599 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2600 PL_dowarn |= G_WARN_ON;
599cee73
PM		 2601 s++;
2602 return s;
2603 case 'W':
ac27b0f5 2604 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS		 2605 if (!specialWARN(PL_compiling.cop_warnings))
2606 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2607 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM		 2608 s++;
2609 return s;
2610 case 'X':
ac27b0f5 2611 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS		 2612 if (!specialWARN(PL_compiling.cop_warnings))
2613 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2614 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW		 2615 s++;
2616 return s;
a0d0e21e 2617 case '*':
79072805
LW		 2618 case ' ':
2619 if (s[1] == '-') /* Additional switches on #! line. */
2620 return s+2;
2621 break;
a0d0e21e 2622 case '-':
79072805 2623 case 0:
51882d45 2624#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS		 2625 case '\r':
2626#endif
79072805
LW		 2627 case '\n':
2628 case '\t':
2629 break;
aa689395 2630#ifdef ALTERNATE_SHEBANG
2631 case 'S': /* OS/2 needs -S on "extproc" line. */
2632 break;
2633#endif
a0d0e21e 2634 case 'P':
3280af22 2635 if (PL_preprocess)
a0d0e21e
LW		 2636 return s+1;
2637 /* FALL THROUGH */
79072805 2638 default:
cea2e8a9 2639 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW		 2640 }
2641 return Nullch;
2642}
2643
2644/* compliments of Tom Christiansen */
2645
2646/* unexec() can be found in the Gnu emacs distribution */
ee580363 2647/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW		 2648
2649void
864dbfa3 2650Perl_my_unexec(pTHX)
79072805
LW		 2651{
2652#ifdef UNEXEC
46fc3d4c 2653 SV* prog;
2654 SV* file;
ee580363 2655 int status = 1;
79072805
LW		 2656 extern int etext;
2657
ee580363 2658 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2659 sv_catpv(prog, "/perl");
6b88bc9c 2660 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2661 sv_catpv(file, ".perldump");
79072805 2662
ee580363
GS		 2663 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2664 /* unexec prints msg to stderr in case of failure */
6ad3d225 2665 PerlProc_exit(status);
79072805 2666#else
a5f75d66
AD		 2667# ifdef VMS
2668# include <lib$routines.h>
2669 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2670# else
79072805 2671 ABORT(); /* for use with undump */
aa689395 2672# endif
a5f75d66 2673#endif
79072805
LW		 2674}
2675
cb68f92d
GS		 2676/* initialize curinterp */
2677STATIC void
cea2e8a9 2678S_init_interp(pTHX)
cb68f92d
GS		 2679{
2680
acfe0abc
GS		 2681#ifdef MULTIPLICITY
2682# define PERLVAR(var,type)
2683# define PERLVARA(var,n,type)
2684# if defined(PERL_IMPLICIT_CONTEXT)
2685# if defined(USE_5005THREADS)
2686# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2687# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS		 2688# else /* !USE_5005THREADS */
2689# define PERLVARI(var,type,init) aTHX->var = init;
2690# define PERLVARIC(var,type,init) aTHX->var = init;
2691# endif /* USE_5005THREADS */
3967c732 2692# else
acfe0abc
GS		 2693# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2694# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2695# endif
acfe0abc
GS		 2696# include "intrpvar.h"
2697# ifndef USE_5005THREADS
2698# include "thrdvar.h"
2699# endif
2700# undef PERLVAR
2701# undef PERLVARA
2702# undef PERLVARI
2703# undef PERLVARIC
2704#else
2705# define PERLVAR(var,type)
2706# define PERLVARA(var,n,type)
2707# define PERLVARI(var,type,init) PL_##var = init;
2708# define PERLVARIC(var,type,init) PL_##var = init;
2709# include "intrpvar.h"
2710# ifndef USE_5005THREADS
2711# include "thrdvar.h"
2712# endif
2713# undef PERLVAR
2714# undef PERLVARA
2715# undef PERLVARI
2716# undef PERLVARIC
cb68f92d
GS		 2717#endif
2718
cb68f92d
GS		 2719}
2720
76e3520e 2721STATIC void
cea2e8a9 2722S_init_main_stash(pTHX)
79072805 2723{
463ee0b2 2724 GV *gv;
6e72f9df 2725
3280af22 2726 PL_curstash = PL_defstash = newHV();
79cb57f6 2727 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW		 2728 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2729 SvREFCNT_dec(GvHV(gv));
3280af22 2730 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2731 SvREADONLY_on(gv);
3280af22
NIS		 2732 HvNAME(PL_defstash) = savepv("main");
2733 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2734 GvMULTI_on(PL_incgv);
2735 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2736 GvMULTI_on(PL_hintgv);
2737 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2738 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2739 GvMULTI_on(PL_errgv);
2740 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2741 GvMULTI_on(PL_replgv);
cea2e8a9 2742 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB		 2743 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2744 sv_setpvn(ERRSV, "", 0);
3280af22 2745 PL_curstash = PL_defstash;
11faa288 2746 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2747 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2748 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2749 /* We must init $/ before switches are processed. */
864dbfa3 2750 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW		 2751}
2752
76e3520e 2753STATIC void
cea2e8a9 2754S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2755{
1b24ed4b
MS		 2756 char *quote;
2757 char *code;
2758 char *cpp_discard_flag;
2759 char *perl;
2760
6c4ab083 2761 *fdscript = -1;
79072805 2762
3280af22
NIS		 2763 if (PL_e_script) {
2764 PL_origfilename = savepv("-e");
96436eeb 2765 }
6c4ab083
GS		 2766 else {
2767 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2768 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS		 2769
2770 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2771 char *s = scriptname + 8;
2772 *fdscript = atoi(s);
2773 while (isDIGIT(*s))
2774 s++;
2775 if (*s) {
2776 scriptname = savepv(s + 1);
3280af22
NIS		 2777 Safefree(PL_origfilename);
2778 PL_origfilename = scriptname;
6c4ab083
GS		 2779 }
2780 }
2781 }
2782
05ec9bb3 2783 CopFILE_free(PL_curcop);
57843af0 2784 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2785 if (strEQ(PL_origfilename,"-"))
79072805 2786 scriptname = "";
01f988be 2787 if (*fdscript >= 0) {
3280af22 2788 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS		 2789# if defined(HAS_FCNTL) && defined(F_SETFD)
2790 if (PL_rsfp)
2791 /* ensure close-on-exec */
2792 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2793# endif
96436eeb 2794 }
3280af22 2795 else if (PL_preprocess) {
46fc3d4c 2796 char *cpp_cfg = CPPSTDIN;
79cb57f6 2797 SV *cpp = newSVpvn("",0);
46fc3d4c 2798 SV *cmd = NEWSV(0,0);
2799
2800 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2801 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2802 sv_catpv(cpp, cpp_cfg);
79072805 2803
1b24ed4b
MS		 2804# ifndef VMS
2805 sv_catpvn(sv, "-I", 2);
2806 sv_catpv(sv,PRIVLIB_EXP);
2807# endif
46fc3d4c 2808
14953ddc
MB		 2809 DEBUG_P(PerlIO_printf(Perl_debug_log,
2810 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2811 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS		 2812
2813# if defined(MSDOS) || defined(WIN32) || defined(VMS)
2814 quote = "\"";
2815# else
2816 quote = "'";
2817# endif
2818
2819# ifdef VMS
2820 cpp_discard_flag = "";
2821# else
2822 cpp_discard_flag = "-C";
2823# endif
2824
2825# ifdef OS2
2826 perl = os2_execname(aTHX);
2827# else
2828 perl = PL_origargv[0];
2829# endif
2830
2831
2832 /* This strips off Perl comments which might interfere with
62375a60
NIS		 2833 the C pre-processor, including #!. #line directives are
2834 deliberately stripped to avoid confusion with Perl's version
1b24ed4b
MS		 2835 of #line. FWP played some golf with it so it will fit
2836 into VMS's 255 character buffer.
2837 */
2838 if( PL_doextract )
2839 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2840 else
2841 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2842
2843 Perl_sv_setpvf(aTHX_ cmd, "\
2844%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
62375a60 2845 perl, quote, code, quote, scriptname, cpp,
1b24ed4b
MS		 2846 cpp_discard_flag, sv, CPPMINUS);
2847
3280af22 2848 PL_doextract = FALSE;
1b24ed4b
MS		 2849# ifdef IAMSUID /* actually, this is caught earlier */
2850 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2851# ifdef HAS_SETEUID
2852 (void)seteuid(PL_uid); /* musn't stay setuid root */
2853# else
2854# ifdef HAS_SETREUID
2855 (void)setreuid((Uid_t)-1, PL_uid);
2856# else
2857# ifdef HAS_SETRESUID
2858 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2859# else
2860 PerlProc_setuid(PL_uid);
2861# endif
2862# endif
2863# endif
b28d0864 2864 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2865 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805 2866 }
1b24ed4b 2867# endif /* IAMSUID */
0a6c758d 2868
62375a60
NIS		 2869 DEBUG_P(PerlIO_printf(Perl_debug_log,
2870 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS		 2871 SvPVX(cmd)));
2872
3280af22 2873 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c 2874 SvREFCNT_dec(cmd);
2875 SvREFCNT_dec(cpp);
79072805
LW		 2876 }
2877 else if (!*scriptname) {
bbce6d69 2878 forbid_setid("program input from stdin");
3280af22 2879 PL_rsfp = PerlIO_stdin();
79072805 2880 }
96436eeb 2881 else {
3280af22 2882 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS		 2883# if defined(HAS_FCNTL) && defined(F_SETFD)
2884 if (PL_rsfp)
2885 /* ensure close-on-exec */
2886 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2887# endif
96436eeb 2888 }
3280af22 2889 if (!PL_rsfp) {
1b24ed4b
MS		 2890# ifdef DOSUID
2891# ifndef IAMSUID /* in case script is not readable before setuid */
2892 if (PL_euid &&
2893 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
2894 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2895 {
2896 /* try again */
62375a60
NIS		 2897 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT,
2898 BIN_EXP, (int)PERL_REVISION,
1b24ed4b
MS		 2899 (int)PERL_VERSION,
2900 (int)PERL_SUBVERSION), PL_origargv);
2901 Perl_croak(aTHX_ "Can't do setuid\n");
2902 }
2903# endif
2904# endif
2905# ifdef IAMSUID
2906 errno = EPERM;
2907 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2908 Strerror(errno));
2909# else
2910 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
2911 CopFILE(PL_curcop), Strerror(errno));
2912# endif
13281fa4 2913 }
79072805 2914}
8d063cd8 2915
7b89560d
JH		 2916/* Mention
2917 * I_SYSSTATVFS HAS_FSTATVFS
2918 * I_SYSMOUNT
c890dc6c 2919 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH		 2920 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2921 * here so that metaconfig picks them up. */
2922
104d25b7 2923#ifdef IAMSUID
864dbfa3 2924STATIC int
e688b231 2925S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2926{
0545a864
JH		 2927 int check_okay = 0; /* able to do all the required sys/libcalls */
2928 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2929/*
ad27e871 2930 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2931 * fstatvfs() is UNIX98.
0545a864 2932 * fstatfs() is 4.3 BSD.
ad27e871 2933 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH		 2934 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2935 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH		 2936 */
2937
6439433f
JH		 2938#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2939
2940# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2941 defined(HAS_FSTATVFS)
2942# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2943 struct statvfs stfs;
6439433f 2944
104d25b7
JH		 2945 check_okay = fstatvfs(fd, &stfs) == 0;
2946 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 2947# endif /* fstatvfs */
ac27b0f5 2948
6439433f
JH		 2949# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2950 defined(PERL_MOUNT_NOSUID) && \
2951 defined(HAS_FSTATFS) && \
2952 defined(HAS_STRUCT_STATFS) && \
2953 defined(HAS_STRUCT_STATFS_F_FLAGS)
2954# define FD_ON_NOSUID_CHECK_OKAY
e688b231 2955 struct statfs stfs;
6439433f 2956
104d25b7 2957 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 2958 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH		 2959# endif /* fstatfs */
2960
2961# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2962 defined(PERL_MOUNT_NOSUID) && \
2963 defined(HAS_FSTAT) && \
2964 defined(HAS_USTAT) && \
2965 defined(HAS_GETMNT) && \
2966 defined(HAS_STRUCT_FS_DATA) && \
2967 defined(NOSTAT_ONE)
2968# define FD_ON_NOSUID_CHECK_OKAY
c623ac67 2969 Stat_t fdst;
6439433f 2970
0545a864 2971 if (fstat(fd, &fdst) == 0) {
6439433f
JH		 2972 struct ustat us;
2973 if (ustat(fdst.st_dev, &us) == 0) {
2974 struct fs_data fsd;
2975 /* NOSTAT_ONE here because we're not examining fields which
2976 * vary between that case and STAT_ONE. */
ad27e871 2977 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH		 2978 size_t cmplen = sizeof(us.f_fname);
2979 if (sizeof(fsd.fd_req.path) < cmplen)
2980 cmplen = sizeof(fsd.fd_req.path);
2981 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
2982 fdst.st_dev == fsd.fd_req.dev) {
2983 check_okay = 1;
2984 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
2985 }
2986 }
2987 }
2988 }
0545a864 2989 }
6439433f
JH		 2990# endif /* fstat+ustat+getmnt */
2991
2992# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2993 defined(HAS_GETMNTENT) && \
2994 defined(HAS_HASMNTOPT) && \
2995 defined(MNTOPT_NOSUID)
2996# define FD_ON_NOSUID_CHECK_OKAY
2997 FILE *mtab = fopen("/etc/mtab", "r");
2998 struct mntent *entry;
c623ac67 2999 Stat_t stb, fsb;
104d25b7
JH		 3000
3001 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH		 3002 while (entry = getmntent(mtab)) {
3003 if (stat(entry->mnt_dir, &fsb) == 0
3004 && fsb.st_dev == stb.st_dev)
3005 {
3006 /* found the filesystem */
3007 check_okay = 1;
3008 if (hasmntopt(entry, MNTOPT_NOSUID))
3009 on_nosuid = 1;
3010 break;
3011 } /* A single fs may well fail its stat(). */
3012 }
104d25b7
JH		 3013 }
3014 if (mtab)
6439433f
JH		 3015 fclose(mtab);
3016# endif /* getmntent+hasmntopt */
0545a864 3017
ac27b0f5 3018 if (!check_okay)
0545a864 3019 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH		 3020 return on_nosuid;
3021}
3022#endif /* IAMSUID */
3023
76e3520e 3024STATIC void
cea2e8a9 3025S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 3026{
155aba94 3027#ifdef IAMSUID
96436eeb 3028 int which;
155aba94 3029#endif
96436eeb 3030
13281fa4
LW		 3031 /* do we need to emulate setuid on scripts? */
3032
3033 /* This code is for those BSD systems that have setuid #! scripts disabled
3034 * in the kernel because of a security problem. Merely defining DOSUID
3035 * in perl will not fix that problem, but if you have disabled setuid
3036 * scripts in the kernel, this will attempt to emulate setuid and setgid
3037 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW		 3038 * root version must be called suidperl or sperlN.NNN. If regular perl
3039 * discovers that it has opened a setuid script, it calls suidperl with
3040 * the same argv that it had. If suidperl finds that the script it has
3041 * just opened is NOT setuid root, it sets the effective uid back to the
3042 * uid. We don't just make perl setuid root because that loses the
3043 * effective uid we had before invoking perl, if it was different from the
3044 * uid.
13281fa4
LW		 3045 *
3046 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3047 * be defined in suidperl only. suidperl must be setuid root. The
3048 * Configure script will set this up for you if you want it.
3049 */
a687059c 3050
13281fa4 3051#ifdef DOSUID
6e72f9df 3052 char *s, *s2;
a0d0e21e 3053
b28d0864 3054 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 3055 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 3056 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 3057 I32 len;
2d8e6c8d 3058 STRLEN n_a;
13281fa4 3059
a687059c 3060#ifdef IAMSUID
fe14fcc3 3061#ifndef HAS_SETREUID
a687059c
LW		 3062 /* On this access check to make sure the directories are readable,
3063 * there is actually a small window that the user could use to make
3064 * filename point to an accessible directory. So there is a faint
3065 * chance that someone could execute a setuid script down in a
3066 * non-accessible directory. I don't know what to do about that.
3067 * But I don't think it's too important. The manual lies when
3068 * it says access() is useful in setuid programs.
3069 */
cc49e20b 3070 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 3071 Perl_croak(aTHX_ "Permission denied");
a687059c
LW		 3072#else
3073 /* If we can swap euid and uid, then we can determine access rights
3074 * with a simple stat of the file, and then compare device and
3075 * inode to make sure we did stat() on the same file we opened.
3076 * Then we just have to make sure he or she can execute it.
3077 */
3078 {
c623ac67 3079 Stat_t tmpstatbuf;
a687059c 3080
85e6fe83
LW		 3081 if (
3082#ifdef HAS_SETREUID
b28d0864 3083 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW		 3084#else
3085# if HAS_SETRESUID
b28d0864 3086 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 3087# endif
85e6fe83 3088#endif
b28d0864 3089 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 3090 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 3091 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 3092 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 3093#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 3094 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 3095 Perl_croak(aTHX_ "Permission denied");
104d25b7 3096#endif
b28d0864
NIS		 3097 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3098 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3099 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3100 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3101 }
85e6fe83
LW		 3102 if (
3103#ifdef HAS_SETREUID
b28d0864 3104 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW		 3105#else
3106# if defined(HAS_SETRESUID)
b28d0864 3107 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3108# endif
85e6fe83 3109#endif
b28d0864 3110 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3111 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3112 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3113 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3114 }
fe14fcc3 3115#endif /* HAS_SETREUID */
a687059c
LW		 3116#endif /* IAMSUID */
3117
b28d0864 3118 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3119 Perl_croak(aTHX_ "Permission denied");
b28d0864 3120 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3121 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3122 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3123 CopLINE_inc(PL_curcop);
6b88bc9c 3124 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3125 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3126 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3127 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3128 if (*s == ' ') s++;
45d8adaa 3129 while (!isSPACE(*s)) s++;
2d8e6c8d 3130 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df 3131 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3132 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3133 Perl_croak(aTHX_ "Not a perl script");
a687059c 3134 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW		 3135 /*
3136 * #! arg must be what we saw above. They can invoke it by
3137 * mentioning suidperl explicitly, but they may not add any strange
3138 * arguments beyond what #! says if they do invoke suidperl that way.
3139 */
3140 len = strlen(validarg);
3141 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3142 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3143 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW		 3144
3145#ifndef IAMSUID
b28d0864
NIS		 3146 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3147 PL_euid == PL_statbuf.st_uid)
3148 if (!PL_do_undump)
cea2e8a9 3149 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3150FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3151#endif /* IAMSUID */
13281fa4 3152
b28d0864
NIS		 3153 if (PL_euid) { /* oops, we're not the setuid root perl */
3154 (void)PerlIO_close(PL_rsfp);
13281fa4 3155#ifndef IAMSUID
46fc3d4c 3156 /* try again */
a7cb1f99 3157 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3158 (int)PERL_REVISION, (int)PERL_VERSION,
3159 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3160#endif
cea2e8a9 3161 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 3162 }
3163
b28d0864 3164 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3165#ifdef HAS_SETEGID
b28d0864 3166 (void)setegid(PL_statbuf.st_gid);
a687059c 3167#else
fe14fcc3 3168#ifdef HAS_SETREGID
b28d0864 3169 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW		 3170#else
3171#ifdef HAS_SETRESGID
b28d0864 3172 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3173#else
b28d0864 3174 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW		 3175#endif
3176#endif
85e6fe83 3177#endif
b28d0864 3178 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3179 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3180 }
b28d0864
NIS		 3181 if (PL_statbuf.st_mode & S_ISUID) {
3182 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3183#ifdef HAS_SETEUID
b28d0864 3184 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3185#else
fe14fcc3 3186#ifdef HAS_SETREUID
b28d0864 3187 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW		 3188#else
3189#ifdef HAS_SETRESUID
b28d0864 3190 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3191#else
b28d0864 3192 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW		 3193#endif
3194#endif
85e6fe83 3195#endif
b28d0864 3196 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3197 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3198 }
b28d0864 3199 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3200#ifdef HAS_SETEUID
b28d0864 3201 (void)seteuid((Uid_t)PL_uid);
a687059c 3202#else
fe14fcc3 3203#ifdef HAS_SETREUID
b28d0864 3204 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3205#else
85e6fe83 3206#ifdef HAS_SETRESUID
b28d0864 3207 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3208#else
b28d0864 3209 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3210#endif
a687059c
LW		 3211#endif
3212#endif
b28d0864 3213 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3214 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3215 }
748a9306 3216 init_ids();
b28d0864 3217 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3218 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW		 3219 }
3220#ifdef IAMSUID
6b88bc9c 3221 else if (PL_preprocess)
cea2e8a9 3222 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3223 else if (fdscript >= 0)
cea2e8a9 3224 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3225 else
cea2e8a9 3226 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb 3227
3228 /* We absolutely must clear out any saved ids here, so we */
3229 /* exec the real perl, substituting fd script for scriptname. */
3230 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS		 3231 PerlIO_rewind(PL_rsfp);
3232 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS		 3233 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3234 if (!PL_origargv[which])
cea2e8a9
GS		 3235 Perl_croak(aTHX_ "Permission denied");
3236 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3237 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3238#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3239 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3240#endif
a7cb1f99 3241 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3242 (int)PERL_REVISION, (int)PERL_VERSION,
3243 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3244 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3245#endif /* IAMSUID */
a687059c 3246#else /* !DOSUID */
3280af22 3247 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3248#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS		 3249 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3250 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3251 ||
b28d0864 3252 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3253 )
b28d0864 3254 if (!PL_do_undump)
cea2e8a9 3255 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3256FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3257#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3258 /* not set-id, must be wrapped */
a687059c 3259 }
13281fa4 3260#endif /* DOSUID */
79072805 3261}
13281fa4 3262
76e3520e 3263STATIC void
cea2e8a9 3264S_find_beginning(pTHX)
79072805 3265{
6e72f9df 3266 register char *s, *s2;
e55ac0fa
HS		 3267#ifdef MACOS_TRADITIONAL
3268 int maclines = 0;
3269#endif
33b78306
LW		 3270
3271 /* skip forward in input to the real script? */
3272
bbce6d69 3273 forbid_setid("-x");
bf4acbe4 3274#ifdef MACOS_TRADITIONAL
084592ab 3275 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3276
bf4acbe4
GS		 3277 while (PL_doextract || gMacPerl_AlwaysExtract) {
3278 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3279 if (!gMacPerl_AlwaysExtract)
3280 Perl_croak(aTHX_ "No Perl script found in input\n");
e55ac0fa 3281
bf4acbe4
GS		 3282 if (PL_doextract) /* require explicit override ? */
3283 if (!OverrideExtract(PL_origfilename))
3284 Perl_croak(aTHX_ "User aborted script\n");
3285 else
3286 PL_doextract = FALSE;
e55ac0fa 3287
bf4acbe4
GS		 3288 /* Pater peccavi, file does not have #! */
3289 PerlIO_rewind(PL_rsfp);
e55ac0fa 3290
bf4acbe4
GS		 3291 break;
3292 }
3293#else
3280af22
NIS		 3294 while (PL_doextract) {
3295 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3296 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3297#endif
4f0c37ba
IZ		 3298 s2 = s;
3299 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS		 3300 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3301 PL_doextract = FALSE;
6e72f9df 3302 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3303 s2 = s;
3304 while (*s == ' ' || *s == '\t') s++;
3305 if (*s++ == '-') {
3306 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3307 if (strnEQ(s2-4,"perl",4))
3308 /*SUPPRESS 530*/
155aba94
GS		 3309 while ((s = moreswitches(s)))
3310 ;
33b78306 3311 }
95e8664e 3312#ifdef MACOS_TRADITIONAL
e55ac0fa
HS		 3313 /* We are always searching for the #!perl line in MacPerl,
3314 * so if we find it, still keep the line count correct
3315 * by counting lines we already skipped over
3316 */
3317 for (; maclines > 0 ; maclines--)
3318 PerlIO_ungetc(PL_rsfp, '\n');
3319
95e8664e 3320 break;
e55ac0fa
HS		 3321
3322 /* gMacPerl_AlwaysExtract is false in MPW tool */
3323 } else if (gMacPerl_AlwaysExtract) {
3324 ++maclines;
95e8664e 3325#endif
83025b21
LW		 3326 }
3327 }
3328}
3329
afe37c7d 3330
76e3520e 3331STATIC void
cea2e8a9 3332S_init_ids(pTHX)
352d5a3a 3333{
d8eceb89
JH		 3334 PL_uid = PerlProc_getuid();
3335 PL_euid = PerlProc_geteuid();
3336 PL_gid = PerlProc_getgid();
3337 PL_egid = PerlProc_getegid();
748a9306 3338#ifdef VMS
b28d0864
NIS		 3339 PL_uid |= PL_gid << 16;
3340 PL_euid |= PL_egid << 16;
748a9306 3341#endif
22f7c9c9
JH		 3342 /* Should not happen: */
3343 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3280af22 3344 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3345}
79072805 3346
a0643315
JH		 3347/* This is used very early in the lifetime of the program,
3348 * before even the options are parsed, so PL_tainting has
af419de7
JH		 3349 * not been initialized properly. The variable PL_earlytaint
3350 * is set early in main() to the result of this function. */
3351bool
22f7c9c9
JH		 3352Perl_doing_taint(int argc, char *argv[], char *envp[])
3353{
af419de7 3354 int uid = PerlProc_getuid();
22f7c9c9 3355 int euid = PerlProc_geteuid();
af419de7 3356 int gid = PerlProc_getgid();
22f7c9c9
JH		 3357 int egid = PerlProc_getegid();
3358
3359#ifdef VMS
af419de7 3360 uid |= gid << 16;
22f7c9c9
JH		 3361 euid |= egid << 16;
3362#endif
3363 if (uid && (euid != uid || egid != gid))
3364 return 1;
af419de7
JH		 3365 /* This is a really primitive check; environment gets ignored only
3366 * if -T are the first chars together; otherwise one gets
3367 * "Too late" message. */
22f7c9c9
JH		 3368 if ( argc > 1 && argv[1][0] == '-'
3369 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3370 return 1;
3371 return 0;
3372}
22f7c9c9 3373
76e3520e 3374STATIC void
cea2e8a9 3375S_forbid_setid(pTHX_ char *s)
bbce6d69 3376{
3280af22 3377 if (PL_euid != PL_uid)
cea2e8a9 3378 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3379 if (PL_egid != PL_gid)
cea2e8a9 3380 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69 3381}
3382
1ee4443e
IZ		 3383void
3384Perl_init_debugger(pTHX)
748a9306 3385{
1ee4443e
IZ		 3386 HV *ostash = PL_curstash;
3387
3280af22
NIS		 3388 PL_curstash = PL_debstash;
3389 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3390 AvREAL_off(PL_dbargs);
3391 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3392 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3393 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3394 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3395 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3396 sv_setiv(PL_DBsingle, 0);
3280af22 3397 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3398 sv_setiv(PL_DBtrace, 0);
3280af22 3399 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3400 sv_setiv(PL_DBsignal, 0);
06492da6
SF		 3401 PL_DBassertion = GvSV((gv_fetchpv("assertion", GV_ADDMULTI, SVt_PV)));
3402 sv_setiv(PL_DBassertion, 0);
1ee4443e 3403 PL_curstash = ostash;
352d5a3a
LW		 3404}
3405
2ce36478
SM		 3406#ifndef STRESS_REALLOC
3407#define REASONABLE(size) (size)
3408#else
3409#define REASONABLE(size) (1) /* unreasonable */
3410#endif
3411
11343788 3412void
cea2e8a9 3413Perl_init_stacks(pTHX)
79072805 3414{
e336de0d 3415 /* start with 128-item stack and 8K cxstack */
3280af22 3416 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3417 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS		 3418 PL_curstackinfo->si_type = PERLSI_MAIN;
3419 PL_curstack = PL_curstackinfo->si_stack;
3420 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3421
3280af22
NIS		 3422 PL_stack_base = AvARRAY(PL_curstack);
3423 PL_stack_sp = PL_stack_base;
3424 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3425
3280af22
NIS		 3426 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3427 PL_tmps_floor = -1;
3428 PL_tmps_ix = -1;
3429 PL_tmps_max = REASONABLE(128);
8990e307 3430
3280af22
NIS		 3431 New(54,PL_markstack,REASONABLE(32),I32);
3432 PL_markstack_ptr = PL_markstack;
3433 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3434
ce2f7c3b 3435 SET_MARK_OFFSET;
e336de0d 3436
3280af22
NIS		 3437 New(54,PL_scopestack,REASONABLE(32),I32);
3438 PL_scopestack_ix = 0;
3439 PL_scopestack_max = REASONABLE(32);
79072805 3440
3280af22
NIS		 3441 New(54,PL_savestack,REASONABLE(128),ANY);
3442 PL_savestack_ix = 0;
3443 PL_savestack_max = REASONABLE(128);
79072805 3444
3280af22
NIS		 3445 New(54,PL_retstack,REASONABLE(16),OP*);
3446 PL_retstack_ix = 0;
3447 PL_retstack_max = REASONABLE(16);
378cc40b 3448}
33b78306 3449
2ce36478
SM		 3450#undef REASONABLE
3451
76e3520e 3452STATIC void
cea2e8a9 3453S_nuke_stacks(pTHX)
6e72f9df 3454{
3280af22
NIS		 3455 while (PL_curstackinfo->si_next)
3456 PL_curstackinfo = PL_curstackinfo->si_next;
3457 while (PL_curstackinfo) {
3458 PERL_SI *p = PL_curstackinfo->si_prev;
bac4b2ad 3459 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3280af22
NIS		 3460 Safefree(PL_curstackinfo->si_cxstack);
3461 Safefree(PL_curstackinfo);
3462 PL_curstackinfo = p;
e336de0d 3463 }
3280af22
NIS		 3464 Safefree(PL_tmps_stack);
3465 Safefree(PL_markstack);
3466 Safefree(PL_scopestack);
3467 Safefree(PL_savestack);
3468 Safefree(PL_retstack);
378cc40b 3469}
33b78306 3470
76e3520e 3471STATIC void
cea2e8a9 3472S_init_lexer(pTHX)
8990e307 3473{
06039172 3474 PerlIO *tmpfp;
3280af22
NIS		 3475 tmpfp = PL_rsfp;
3476 PL_rsfp = Nullfp;
3477 lex_start(PL_linestr);
3478 PL_rsfp = tmpfp;
79cb57f6 3479 PL_subname = newSVpvn("main",4);
8990e307
LW		 3480}
3481
76e3520e 3482STATIC void
cea2e8a9 3483S_init_predump_symbols(pTHX)
45d8adaa 3484{
93a17b20 3485 GV *tmpgv;
af8c498a 3486 IO *io;
79072805 3487
864dbfa3 3488 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3280af22
NIS		 3489 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3490 GvMULTI_on(PL_stdingv);
af8c498a 3491 io = GvIOp(PL_stdingv);
a04651f4 3492 IoTYPE(io) = IoTYPE_RDONLY;
af8c498a 3493 IoIFP(io) = PerlIO_stdin();
adbc6bb1 3494 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
a5f75d66 3495 GvMULTI_on(tmpgv);
af8c498a 3496 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
79072805 3497
85e6fe83 3498 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
a5f75d66 3499 GvMULTI_on(tmpgv);
af8c498a 3500 io = GvIOp(tmpgv);
a04651f4 3501 IoTYPE(io) = IoTYPE_WRONLY;
af8c498a 3502 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4633a7c4 3503 setdefout(tmpgv);