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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
8990e307 277 ENTER;
79072805
LW		 278}
279
954c1994 280/*
62375a60
NIS		 281=for apidoc nothreadhook
282
283Stub that provides thread hook for perl_destruct when there are
284no threads.
285
286=cut
287*/
288
289int
4e9e3734 290Perl_nothreadhook(pTHX)
62375a60
NIS		 291{
292 return 0;
293}
294
295/*
954c1994
GS		 296=for apidoc perl_destruct
297
298Shuts down a Perl interpreter. See L<perlembed>.
299
300=cut
301*/
302
31d77e54 303int
0cb96387 304perl_destruct(pTHXx)
79072805 305{
7c474504 306 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 307 HV *hv;
4d1ff10f 308#ifdef USE_5005THREADS
cea2e8a9 309 dTHX;
4d1ff10f 310#endif /* USE_5005THREADS */
8990e307 311
7766f137
GS		 312 /* wait for all pseudo-forked children to finish */
313 PERL_WAIT_FOR_CHILDREN;
314
3280af22 315 destruct_level = PL_perl_destruct_level;
4633a7c4
LW		 316#ifdef DEBUGGING
317 {
318 char *s;
155aba94 319 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc 320 int i = atoi(s);
321 if (destruct_level < i)
322 destruct_level = i;
323 }
4633a7c4
LW		 324 }
325#endif
326
31d77e54
AB		 327
328 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB		 329 dJMPENV;
330 int x = 0;
331
332 JMPENV_PUSH(x);
333 if (PL_endav && !PL_minus_c)
334 call_list(PL_scopestack_ix, PL_endav);
335 JMPENV_POP;
26f423df 336 }
f3faeb53 337 LEAVE;
a0d0e21e
LW		 338 FREETMPS;
339
e00b64d4 340 /* Need to flush since END blocks can produce output */
f13a2bc0 341 my_fflush_all();
e00b64d4 342
62375a60
NIS		 343 if (CALL_FPTR(PL_threadhook)(aTHX)) {
344 /* Threads hook has vetoed further cleanup */
b47cad08 345 return STATUS_NATIVE_EXPORT;
62375a60
NIS		 346 }
347
ff0cee69 348 /* We must account for everything. */
349
350 /* Destroy the main CV and syntax tree */
3280af22 351 if (PL_main_root) {
3280af22
NIS		 352 op_free(PL_main_root);
353 PL_main_root = Nullop;
a0d0e21e 354 }
3280af22
NIS		 355 PL_curcop = &PL_compiling;
356 PL_main_start = Nullop;
357 SvREFCNT_dec(PL_main_cv);
358 PL_main_cv = Nullcv;
24d3c518 359 PL_dirty = TRUE;
ff0cee69 360
13621cfb
NIS		 361 /* Tell PerlIO we are about to tear things apart in case
362 we have layers which are using resources that should
363 be cleaned up now.
364 */
365
366 PerlIO_destruct(aTHX);
367
3280af22 368 if (PL_sv_objcount) {
a0d0e21e
LW		 369 /*
370 * Try to destruct global references. We do this first so that the
371 * destructors and destructees still exist. Some sv's might remain.
372 * Non-referenced objects are on their own.
373 */
a0d0e21e 374 sv_clean_objs();
8990e307
LW		 375 }
376
5cd24f17 377 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS		 378 SvREFCNT_dec(PL_warnhook);
379 PL_warnhook = Nullsv;
380 SvREFCNT_dec(PL_diehook);
381 PL_diehook = Nullsv;
5cd24f17 382
4b556e6c 383 /* call exit list functions */
3280af22 384 while (PL_exitlistlen-- > 0)
acfe0abc 385 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 386
3280af22 387 Safefree(PL_exitlist);
4b556e6c 388
1c4916e5
CB		 389 PL_exitlist = NULL;
390 PL_exitlistlen = 0;
391
a0d0e21e 392 if (destruct_level == 0){
8990e307 393
a0d0e21e 394 DEBUG_P(debprofdump());
ac27b0f5 395
56a2bab7
NIS		 396#if defined(PERLIO_LAYERS)
397 /* No more IO - including error messages ! */
398 PerlIO_cleanup(aTHX);
399#endif
400
a0d0e21e 401 /* The exit() function will do everything that needs doing. */
b47cad08 402 return STATUS_NATIVE_EXPORT;
a0d0e21e 403 }
5dd60ef7 404
551a8b83 405 /* jettison our possibly duplicated environment */
4b647fb0
DM		 406 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
407 * so we certainly shouldn't free it here
408 */
409#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
4efc5df6
GS		 410 if (environ != PL_origenviron
411#ifdef USE_ITHREADS
412 /* only main thread can free environ[0] contents */
413 && PL_curinterp == aTHX
414#endif
415 )
416 {
551a8b83
JH		 417 I32 i;
418
419 for (i = 0; environ[i]; i++)
4b420006 420 safesysfree(environ[i]);
0631ea03 421
4b420006
JH		 422 /* Must use safesysfree() when working with environ. */
423 safesysfree(environ);
551a8b83
JH		 424
425 environ = PL_origenviron;
426 }
427#endif
428
5f8cb046
DM		 429#ifdef USE_ITHREADS
430 /* the syntax tree is shared between clones
431 * so op_free(PL_main_root) only ReREFCNT_dec's
432 * REGEXPs in the parent interpreter
433 * we need to manually ReREFCNT_dec for the clones
434 */
435 {
436 I32 i = AvFILLp(PL_regex_padav) + 1;
437 SV **ary = AvARRAY(PL_regex_padav);
438
439 while (i) {
35061a7e 440 SV *resv = ary[--i];
ba89bb6e 441 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM		 442
443 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 444 /* this is PL_reg_curpm, already freed
35061a7e
DM		 445 * flag is set in regexec.c:S_regtry
446 */
447 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 448 }
1cc8b4c5
AB		 449 else if(SvREPADTMP(resv)) {
450 SvREPADTMP_off(resv);
451 }
35061a7e 452 else {
5f8cb046
DM		 453 ReREFCNT_dec(re);
454 }
455 }
456 }
457 SvREFCNT_dec(PL_regex_padav);
458 PL_regex_padav = Nullav;
459 PL_regex_pad = NULL;
460#endif
461
081fc587
AB		 462 SvREFCNT_dec((SV*) PL_stashcache);
463 PL_stashcache = NULL;
464
5f05dabc 465 /* loosen bonds of global variables */
466
3280af22
NIS		 467 if(PL_rsfp) {
468 (void)PerlIO_close(PL_rsfp);
469 PL_rsfp = Nullfp;
8ebc5c01 470 }
471
472 /* Filters for program text */
3280af22
NIS		 473 SvREFCNT_dec(PL_rsfp_filters);
474 PL_rsfp_filters = Nullav;
8ebc5c01 475
476 /* switches */
3280af22
NIS		 477 PL_preprocess = FALSE;
478 PL_minus_n = FALSE;
479 PL_minus_p = FALSE;
480 PL_minus_l = FALSE;
481 PL_minus_a = FALSE;
482 PL_minus_F = FALSE;
483 PL_doswitches = FALSE;
599cee73 484 PL_dowarn = G_WARN_OFF;
3280af22
NIS		 485 PL_doextract = FALSE;
486 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS		 487 PL_unsafe = FALSE;
488
489 Safefree(PL_inplace);
490 PL_inplace = Nullch;
a7cb1f99 491 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS		 492
493 if (PL_e_script) {
494 SvREFCNT_dec(PL_e_script);
495 PL_e_script = Nullsv;
8ebc5c01 496 }
497
498 /* magical thingies */
499
7889fe52
NIS		 500 SvREFCNT_dec(PL_ofs_sv); /* $, */
501 PL_ofs_sv = Nullsv;
5f05dabc 502
7889fe52
NIS		 503 SvREFCNT_dec(PL_ors_sv); /* $\ */
504 PL_ors_sv = Nullsv;
8ebc5c01 505
3280af22
NIS		 506 SvREFCNT_dec(PL_rs); /* $/ */
507 PL_rs = Nullsv;
dc92893f 508
d33b2eba
GS		 509 PL_multiline = 0; /* $* */
510 Safefree(PL_osname); /* $^O */
511 PL_osname = Nullch;
5f05dabc 512
3280af22
NIS		 513 SvREFCNT_dec(PL_statname);
514 PL_statname = Nullsv;
515 PL_statgv = Nullgv;
5f05dabc 516
8ebc5c01 517 /* defgv, aka *_ should be taken care of elsewhere */
518
8ebc5c01 519 /* clean up after study() */
3280af22
NIS		 520 SvREFCNT_dec(PL_lastscream);
521 PL_lastscream = Nullsv;
522 Safefree(PL_screamfirst);
523 PL_screamfirst = 0;
524 Safefree(PL_screamnext);
525 PL_screamnext = 0;
8ebc5c01 526
7d5ea4e7
GS		 527 /* float buffer */
528 Safefree(PL_efloatbuf);
529 PL_efloatbuf = Nullch;
530 PL_efloatsize = 0;
531
8ebc5c01 532 /* startup and shutdown function lists */
3280af22 533 SvREFCNT_dec(PL_beginav);
5a837c8f 534 SvREFCNT_dec(PL_beginav_save);
3280af22 535 SvREFCNT_dec(PL_endav);
7d30b5c4 536 SvREFCNT_dec(PL_checkav);
ece599bd 537 SvREFCNT_dec(PL_checkav_save);
3280af22
NIS		 538 SvREFCNT_dec(PL_initav);
539 PL_beginav = Nullav;
5a837c8f 540 PL_beginav_save = Nullav;
3280af22 541 PL_endav = Nullav;
7d30b5c4 542 PL_checkav = Nullav;
ece599bd 543 PL_checkav_save = Nullav;
3280af22 544 PL_initav = Nullav;
5618dfe8 545
8ebc5c01 546 /* shortcuts just get cleared */
3280af22 547 PL_envgv = Nullgv;
3280af22
NIS		 548 PL_incgv = Nullgv;
549 PL_hintgv = Nullgv;
550 PL_errgv = Nullgv;
551 PL_argvgv = Nullgv;
552 PL_argvoutgv = Nullgv;
553 PL_stdingv = Nullgv;
bf49b057 554 PL_stderrgv = Nullgv;
3280af22
NIS		 555 PL_last_in_gv = Nullgv;
556 PL_replgv = Nullgv;
5c831c24 557 PL_debstash = Nullhv;
8ebc5c01 558
559 /* reset so print() ends up where we expect */
560 setdefout(Nullgv);
5c831c24 561
7a1c5554
GS		 562 SvREFCNT_dec(PL_argvout_stack);
563 PL_argvout_stack = Nullav;
8ebc5c01 564
5c831c24
GS		 565 SvREFCNT_dec(PL_modglobal);
566 PL_modglobal = Nullhv;
567 SvREFCNT_dec(PL_preambleav);
568 PL_preambleav = Nullav;
569 SvREFCNT_dec(PL_subname);
570 PL_subname = Nullsv;
571 SvREFCNT_dec(PL_linestr);
572 PL_linestr = Nullsv;
573 SvREFCNT_dec(PL_pidstatus);
574 PL_pidstatus = Nullhv;
575 SvREFCNT_dec(PL_toptarget);
576 PL_toptarget = Nullsv;
577 SvREFCNT_dec(PL_bodytarget);
578 PL_bodytarget = Nullsv;
579 PL_formtarget = Nullsv;
580
d33b2eba 581 /* free locale stuff */
b9582b6a 582#ifdef USE_LOCALE_COLLATE
d33b2eba
GS		 583 Safefree(PL_collation_name);
584 PL_collation_name = Nullch;
b9582b6a 585#endif
d33b2eba 586
b9582b6a 587#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS		 588 Safefree(PL_numeric_name);
589 PL_numeric_name = Nullch;
a453c169 590 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 591#endif
d33b2eba 592
5c831c24
GS		 593 /* clear utf8 character classes */
594 SvREFCNT_dec(PL_utf8_alnum);
595 SvREFCNT_dec(PL_utf8_alnumc);
596 SvREFCNT_dec(PL_utf8_ascii);
597 SvREFCNT_dec(PL_utf8_alpha);
598 SvREFCNT_dec(PL_utf8_space);
599 SvREFCNT_dec(PL_utf8_cntrl);
600 SvREFCNT_dec(PL_utf8_graph);
601 SvREFCNT_dec(PL_utf8_digit);
602 SvREFCNT_dec(PL_utf8_upper);
603 SvREFCNT_dec(PL_utf8_lower);
604 SvREFCNT_dec(PL_utf8_print);
605 SvREFCNT_dec(PL_utf8_punct);
606 SvREFCNT_dec(PL_utf8_xdigit);
607 SvREFCNT_dec(PL_utf8_mark);
608 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 609 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 610 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 611 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH		 612 SvREFCNT_dec(PL_utf8_idstart);
613 SvREFCNT_dec(PL_utf8_idcont);
5c831c24
GS		 614 PL_utf8_alnum = Nullsv;
615 PL_utf8_alnumc = Nullsv;
616 PL_utf8_ascii = Nullsv;
617 PL_utf8_alpha = Nullsv;
618 PL_utf8_space = Nullsv;
619 PL_utf8_cntrl = Nullsv;
620 PL_utf8_graph = Nullsv;
621 PL_utf8_digit = Nullsv;
622 PL_utf8_upper = Nullsv;
623 PL_utf8_lower = Nullsv;
624 PL_utf8_print = Nullsv;
625 PL_utf8_punct = Nullsv;
626 PL_utf8_xdigit = Nullsv;
627 PL_utf8_mark = Nullsv;
628 PL_utf8_toupper = Nullsv;
629 PL_utf8_totitle = Nullsv;
630 PL_utf8_tolower = Nullsv;
b4e400f9 631 PL_utf8_tofold = Nullsv;
82686b01
JH		 632 PL_utf8_idstart = Nullsv;
633 PL_utf8_idcont = Nullsv;
5c831c24 634
971a9dd3
GS		 635 if (!specialWARN(PL_compiling.cop_warnings))
636 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 637 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS		 638 if (!specialCopIO(PL_compiling.cop_io))
639 SvREFCNT_dec(PL_compiling.cop_io);
640 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS		 641 CopFILE_free(&PL_compiling);
642 CopSTASH_free(&PL_compiling);
5c831c24 643
a0d0e21e 644 /* Prepare to destruct main symbol table. */
5f05dabc 645
3280af22
NIS		 646 hv = PL_defstash;
647 PL_defstash = 0;
a0d0e21e 648 SvREFCNT_dec(hv);
5c831c24
GS		 649 SvREFCNT_dec(PL_curstname);
650 PL_curstname = Nullsv;
a0d0e21e 651
5a844595
GS		 652 /* clear queued errors */
653 SvREFCNT_dec(PL_errors);
654 PL_errors = Nullsv;
655
a0d0e21e 656 FREETMPS;
0453d815 657 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 658 if (PL_scopestack_ix != 0)
9014280d 659 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 660 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS		 661 (long)PL_scopestack_ix);
662 if (PL_savestack_ix != 0)
9014280d 663 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 664 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS		 665 (long)PL_savestack_ix);
666 if (PL_tmps_floor != -1)
9014280d 667 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 668 (long)PL_tmps_floor + 1);
a0d0e21e 669 if (cxstack_ix != -1)
9014280d 670 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 671 (long)cxstack_ix + 1);
a0d0e21e 672 }
8990e307
LW		 673
674 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 675 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 676 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH		 677
678 /* the 2 is for PL_fdpid and PL_strtab */
679 while (PL_sv_count > 2 && sv_clean_all())
680 ;
681
d33b2eba
GS		 682 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
683 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS		 684 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
685 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 686
d4777f27
GS		 687 AvREAL_off(PL_fdpid); /* no surviving entries */
688 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS		 689 PL_fdpid = Nullav;
690
6c644e78
GS		 691#ifdef HAVE_INTERP_INTERN
692 sys_intern_clear();
693#endif
694
6e72f9df 695 /* Destruct the global string table. */
696 {
697 /* Yell and reset the HeVAL() slots that are still holding refcounts,
698 * so that sv_free() won't fail on them.
699 */
700 I32 riter;
701 I32 max;
702 HE *hent;
703 HE **array;
704
705 riter = 0;
3280af22
NIS		 706 max = HvMAX(PL_strtab);
707 array = HvARRAY(PL_strtab);
6e72f9df 708 hent = array[0];
709 for (;;) {
0453d815 710 if (hent && ckWARN_d(WARN_INTERNAL)) {
9014280d 711 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 712 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df 713 HeVAL(hent) - Nullsv, HeKEY(hent));
714 HeVAL(hent) = Nullsv;
715 hent = HeNEXT(hent);
716 }
717 if (!hent) {
718 if (++riter > max)
719 break;
720 hent = array[riter];
721 }
722 }
723 }
3280af22 724 SvREFCNT_dec(PL_strtab);
6e72f9df 725
e652bb2f 726#ifdef USE_ITHREADS
a0739874
DM		 727 /* free the pointer table used for cloning */
728 ptr_table_free(PL_ptr_table);
53186e96 729#endif
a0739874 730
d33b2eba
GS		 731 /* free special SVs */
732
733 SvREFCNT(&PL_sv_yes) = 0;
734 sv_clear(&PL_sv_yes);
735 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 736 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS		 737
738 SvREFCNT(&PL_sv_no) = 0;
739 sv_clear(&PL_sv_no);
740 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 741 SvFLAGS(&PL_sv_no) = 0;
01724ea0 742
9f375a43
DM		 743 {
744 int i;
745 for (i=0; i<=2; i++) {
746 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
747 sv_clear(PERL_DEBUG_PAD(i));
748 SvANY(PERL_DEBUG_PAD(i)) = NULL;
749 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
750 }
751 }
752
0453d815 753 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 754 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 755
eba0f806
DM		 756#ifdef DEBUG_LEAKING_SCALARS
757 if (PL_sv_count != 0) {
758 SV* sva;
759 SV* sv;
760 register SV* svend;
761
762 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
763 svend = &sva[SvREFCNT(sva)];
764 for (sv = sva + 1; sv < svend; ++sv) {
765 if (SvTYPE(sv) != SVTYPEMASK) {
766 PerlIO_printf(Perl_debug_log, "leaked: 0x%p\n", sv);
767 }
768 }
769 }
770 }
771#endif
772
773
56a2bab7 774#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS		 775 /* No more IO - including error messages ! */
776 PerlIO_cleanup(aTHX);
777#endif
778
9f4bd222
NIS		 779 /* sv_undef needs to stay immortal until after PerlIO_cleanup
780 as currently layers use it rather than Nullsv as a marker
781 for no arg - and will try and SvREFCNT_dec it.
782 */
783 SvREFCNT(&PL_sv_undef) = 0;
784 SvREADONLY_off(&PL_sv_undef);
785
3280af22 786 Safefree(PL_origfilename);
3280af22 787 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ		 788 if (PL_reg_curpm)
789 Safefree(PL_reg_curpm);
82ba1be6 790 Safefree(PL_reg_poscache);
dd28f7bb 791 free_tied_hv_pool();
3280af22 792 Safefree(PL_op_mask);
cf36064f
GS		 793 Safefree(PL_psig_ptr);
794 Safefree(PL_psig_name);
2c2666fc 795 Safefree(PL_bitcount);
ce08f86c 796 Safefree(PL_psig_pend);
6e72f9df 797 nuke_stacks();
3280af22 798 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 799
a0d0e21e 800 DEBUG_P(debprofdump());
d33b2eba 801
e5dd39fc 802#ifdef USE_REENTRANT_API
10bc17b6 803 Perl_reentrant_free(aTHX);
e5dd39fc
AB		 804#endif
805
612f20c3
GS		 806 sv_free_arenas();
807
fc36a67e 808 /* As the absolutely last thing, free the non-arena SV for mess() */
809
3280af22 810 if (PL_mess_sv) {
9c63abab
GS		 811 /* it could have accumulated taint magic */
812 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
813 MAGIC* mg;
814 MAGIC* moremagic;
815 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
816 moremagic = mg->mg_moremagic;
14befaf4
DM		 817 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
818 && mg->mg_len >= 0)
9c63abab
GS		 819 Safefree(mg->mg_ptr);
820 Safefree(mg);
821 }
822 }
fc36a67e 823 /* we know that type >= SVt_PV */
155aba94 824 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS		 825 Safefree(SvPVX(PL_mess_sv));
826 Safefree(SvANY(PL_mess_sv));
827 Safefree(PL_mess_sv);
828 PL_mess_sv = Nullsv;
fc36a67e 829 }
31d77e54 830 return STATUS_NATIVE_EXPORT;
79072805
LW		 831}
832
954c1994
GS		 833/*
834=for apidoc perl_free
835
836Releases a Perl interpreter. See L<perlembed>.
837
838=cut
839*/
840
79072805 841void
0cb96387 842perl_free(pTHXx)
79072805 843{
acfe0abc 844#if defined(WIN32) || defined(NETWARE)
ce3e5b80 845# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS		 846# ifdef NETWARE
847 void *host = nw_internal_host;
848# else
849 void *host = w32_internal_host;
850# endif
ce3e5b80 851 PerlMem_free(aTHXx);
acfe0abc 852# ifdef NETWARE
011f1a1a 853 nw_delete_internal_host(host);
acfe0abc
GS		 854# else
855 win32_delete_internal_host(host);
856# endif
1c0ca838
GS		 857# else
858 PerlMem_free(aTHXx);
859# endif
acfe0abc
GS		 860#else
861 PerlMem_free(aTHXx);
76e3520e 862#endif
79072805
LW		 863}
864
4b556e6c 865void
864dbfa3 866Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 867{
3280af22
NIS		 868 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
869 PL_exitlist[PL_exitlistlen].fn = fn;
870 PL_exitlist[PL_exitlistlen].ptr = ptr;
871 ++PL_exitlistlen;
4b556e6c
JD		 872}
873
954c1994
GS		 874/*
875=for apidoc perl_parse
876
877Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
878
879=cut
880*/
881
79072805 882int
0cb96387 883perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 884{
6224f72b 885 I32 oldscope;
6224f72b 886 int ret;
db36c5a1 887 dJMPENV;
4d1ff10f 888#ifdef USE_5005THREADS
cea2e8a9
GS		 889 dTHX;
890#endif
8d063cd8 891
a687059c
LW		 892#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
893#ifdef IAMSUID
894#undef IAMSUID
cea2e8a9 895 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW		 896setuid perl scripts securely.\n");
897#endif
898#endif
899
b0891165
JH		 900#if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
901 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
902 * This MUST be done before any hash stores or fetches take place. */
bed60192
JH		 903 if (!PL_hash_seed_set)
904 PL_hash_seed = get_seed();
b0891165 905 {
bed60192
JH		 906 char *s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
907
908 if (s) {
909 int i = atoi(s);
910
911 if (i == 1)
912 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n",
913 PL_hash_seed);
914 }
b0891165
JH		 915 }
916#endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
917
3280af22 918 PL_origargc = argc;
e2975953 919 PL_origargv = argv;
a0d0e21e 920
54bfe034 921 {
3cb9023d
JH		 922 /* Set PL_origalen be the sum of the contiguous argv[]
923 * elements plus the size of the env in case that it is
924 * contiguous with the argv[]. This is used in mg.c:mg_set()
925 * as the maximum modifiable length of $0. In the worst case
926 * the area we are able to modify is limited to the size of
43c32782 927 * the original argv[0]. (See below for 'contiguous', though.)
3cb9023d
JH		 928 * --jhi */
929 char *s;
54bfe034 930 int i;
7d8e7db3
JH		 931 UV mask =
932 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
43c32782
JH		 933 /* Do the mask check only if the args seem like aligned. */
934 UV aligned =
935 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
936
937 /* See if all the arguments are contiguous in memory. Note
938 * that 'contiguous' is a loose term because some platforms
939 * align the argv[] and the envp[]. If the arguments look
940 * like non-aligned, assume that they are 'strictly' or
941 * 'traditionally' contiguous. If the arguments look like
942 * aligned, we just check that they are within aligned
943 * PTRSIZE bytes. As long as no system has something bizarre
944 * like the argv[] interleaved with some other data, we are
945 * fine. (Did I just evoke Murphy's Law?) --jhi */
3cb9023d
JH		 946 s = PL_origargv[0];
947 while (*s) s++;
54bfe034 948 for (i = 1; i < PL_origargc; i++) {
43c32782
JH		 949 if ((PL_origargv[i] == s + 1
950#ifdef OS2
951 || PL_origargv[i] == s + 2
952#endif
953 )
954 ||
955 (aligned &&
956 (PL_origargv[i] > s &&
957 PL_origargv[i] <=
958 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
959 )
960 {
3cb9023d
JH		 961 s = PL_origargv[i];
962 while (*s) s++;
54bfe034
JH		 963 }
964 else
965 break;
966 }
3cb9023d 967 /* Can we grab env area too to be used as the area for $0? */
43c32782
JH		 968 if (PL_origenviron) {
969 if ((PL_origenviron[0] == s + 1
970#ifdef OS2
971 || (PL_origenviron[0] == s + 9 && (s += 8))
972#endif
973 )
974 ||
975 (aligned &&
976 (PL_origenviron[0] > s &&
977 PL_origenviron[0] <=
978 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
979 )
980 {
981#ifndef OS2
982 s = PL_origenviron[0];
983 while (*s) s++;
984#endif
985 my_setenv("NoNe SuCh", Nullch);
986 /* Force copy of environment. */
987 for (i = 1; PL_origenviron[i]; i++) {
988 if (PL_origenviron[i] == s + 1
989 ||
990 (aligned &&
991 (PL_origenviron[i] > s &&
992 PL_origenviron[i] <=
993 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
994 )
995 {
996 s = PL_origenviron[i];
997 while (*s) s++;
998 }
999 else
1000 break;
54bfe034 1001 }
43c32782 1002 }
54bfe034
JH		 1003 }
1004 PL_origalen = s - PL_origargv[0];
1005 }
1006
3280af22 1007 if (PL_do_undump) {
a0d0e21e
LW		 1008
1009 /* Come here if running an undumped a.out. */
1010
3280af22
NIS		 1011 PL_origfilename = savepv(argv[0]);
1012 PL_do_undump = FALSE;
a0d0e21e 1013 cxstack_ix = -1; /* start label stack again */
748a9306 1014 init_ids();
a0d0e21e
LW		 1015 init_postdump_symbols(argc,argv,env);
1016 return 0;
1017 }
1018
3280af22 1019 if (PL_main_root) {
3280af22
NIS		 1020 op_free(PL_main_root);
1021 PL_main_root = Nullop;
ff0cee69 1022 }
3280af22
NIS		 1023 PL_main_start = Nullop;
1024 SvREFCNT_dec(PL_main_cv);
1025 PL_main_cv = Nullcv;
79072805 1026
3280af22
NIS		 1027 time(&PL_basetime);
1028 oldscope = PL_scopestack_ix;
599cee73 1029 PL_dowarn = G_WARN_OFF;
f86702cc 1030
14dd3ad8
GS		 1031#ifdef PERL_FLEXIBLE_EXCEPTIONS
1032 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
1033#else
1034 JMPENV_PUSH(ret);
1035#endif
6224f72b 1036 switch (ret) {
312caa8e 1037 case 0:
14dd3ad8
GS		 1038#ifndef PERL_FLEXIBLE_EXCEPTIONS
1039 parse_body(env,xsinit);
1040#endif
7d30b5c4
GS		 1041 if (PL_checkav)
1042 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 1043 ret = 0;
1044 break;
6224f72b
GS		 1045 case 1:
1046 STATUS_ALL_FAILURE;
1047 /* FALL THROUGH */
1048 case 2:
1049 /* my_exit() was called */
3280af22 1050 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1051 LEAVE;
1052 FREETMPS;
3280af22 1053 PL_curstash = PL_defstash;
7d30b5c4
GS		 1054 if (PL_checkav)
1055 call_list(oldscope, PL_checkav);
14dd3ad8
GS		 1056 ret = STATUS_NATIVE_EXPORT;
1057 break;
6224f72b 1058 case 3:
bf49b057 1059 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS		 1060 ret = 1;
1061 break;
6224f72b 1062 }
14dd3ad8
GS		 1063 JMPENV_POP;
1064 return ret;
1065}
1066
1067#ifdef PERL_FLEXIBLE_EXCEPTIONS
1068STATIC void *
1069S_vparse_body(pTHX_ va_list args)
1070{
1071 char **env = va_arg(args, char**);
1072 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1073
1074 return parse_body(env, xsinit);
312caa8e 1075}
14dd3ad8 1076#endif
312caa8e
CS		 1077
1078STATIC void *
14dd3ad8 1079S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1080{
312caa8e
CS		 1081 int argc = PL_origargc;
1082 char **argv = PL_origargv;
312caa8e
CS		 1083 char *scriptname = NULL;
1084 int fdscript = -1;
1085 VOL bool dosearch = FALSE;
1086 char *validarg = "";
312caa8e
CS		 1087 register SV *sv;
1088 register char *s;
cf756827 1089 char *cddir = Nullch;
312caa8e 1090
3280af22 1091 sv_setpvn(PL_linestr,"",0);
79cb57f6 1092 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS		 1093 SAVEFREESV(sv);
1094 init_main_stash();
54310121 1095
6224f72b
GS		 1096 for (argc--,argv++; argc > 0; argc--,argv++) {
1097 if (argv[0][0] != '-' || !argv[0][1])
1098 break;
1099#ifdef DOSUID
1100 if (*validarg)
1101 validarg = " PHOOEY ";
1102 else
1103 validarg = argv[0];
13281fa4 1104#endif
6224f72b
GS		 1105 s = argv[0]+1;
1106 reswitch:
1107 switch (*s) {
729a02f2 1108 case 'C':
1d5472a9
GS		 1109#ifndef PERL_STRICT_CR
1110 case '\r':
1111#endif
6224f72b
GS		 1112 case ' ':
1113 case '0':
1114 case 'F':
1115 case 'a':
1116 case 'c':
1117 case 'd':
1118 case 'D':
1119 case 'h':
1120 case 'i':
1121 case 'l':
1122 case 'M':
1123 case 'm':
1124 case 'n':
1125 case 'p':
1126 case 's':
1127 case 'u':
1128 case 'U':
1129 case 'v':
599cee73
PM		 1130 case 'W':
1131 case 'X':
6224f72b 1132 case 'w':
06492da6 1133 case 'A':
155aba94 1134 if ((s = moreswitches(s)))
6224f72b
GS		 1135 goto reswitch;
1136 break;
33b78306 1137
1dbad523 1138 case 't':
22f7c9c9 1139 CHECK_MALLOC_TOO_LATE_FOR('t');
317ea90d
MS		 1140 if( !PL_tainting ) {
1141 PL_taint_warn = TRUE;
1142 PL_tainting = TRUE;
1143 }
1144 s++;
1145 goto reswitch;
6224f72b 1146 case 'T':
22f7c9c9 1147 CHECK_MALLOC_TOO_LATE_FOR('T');
3280af22 1148 PL_tainting = TRUE;
317ea90d 1149 PL_taint_warn = FALSE;
6224f72b
GS		 1150 s++;
1151 goto reswitch;
f86702cc 1152
6224f72b 1153 case 'e':
bf4acbe4
GS		 1154#ifdef MACOS_TRADITIONAL
1155 /* ignore -e for Dev:Pseudo argument */
1156 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
e55ac0fa 1157 break;
bf4acbe4 1158#endif
3280af22 1159 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1160 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1161 if (!PL_e_script) {
79cb57f6 1162 PL_e_script = newSVpvn("",0);
0cb96387 1163 filter_add(read_e_script, NULL);
6224f72b
GS		 1164 }
1165 if (*++s)
3280af22 1166 sv_catpv(PL_e_script, s);
6224f72b 1167 else if (argv[1]) {
3280af22 1168 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS		 1169 argc--,argv++;
1170 }
1171 else
cea2e8a9 1172 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1173 sv_catpv(PL_e_script, "\n");
6224f72b 1174 break;
afe37c7d 1175
6224f72b
GS		 1176 case 'I': /* -I handled both here and in moreswitches() */
1177 forbid_setid("-I");
1178 if (!*++s && (s=argv[1]) != Nullch) {
1179 argc--,argv++;
1180 }
6224f72b 1181 if (s && *s) {
0df16ed7
GS		 1182 char *p;
1183 STRLEN len = strlen(s);
1184 p = savepvn(s, len);
574c798a 1185 incpush(p, TRUE, TRUE, FALSE);
0df16ed7
GS		 1186 sv_catpvn(sv, "-I", 2);
1187 sv_catpvn(sv, p, len);
1188 sv_catpvn(sv, " ", 1);
6224f72b 1189 Safefree(p);
0df16ed7
GS		 1190 }
1191 else
a67e862a 1192 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS		 1193 break;
1194 case 'P':
1195 forbid_setid("-P");
3280af22 1196 PL_preprocess = TRUE;
6224f72b
GS		 1197 s++;
1198 goto reswitch;
1199 case 'S':
1200 forbid_setid("-S");
1201 dosearch = TRUE;
1202 s++;
1203 goto reswitch;
1204 case 'V':
3280af22
NIS		 1205 if (!PL_preambleav)
1206 PL_preambleav = newAV();
1207 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1208 if (*++s != ':') {
3280af22 1209 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1210#ifdef VMS
6b88bc9c 1211 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1212#else
3280af22 1213 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1214#endif
3280af22 1215 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1216# ifdef DEBUGGING
3280af22 1217 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1218# endif
6224f72b 1219# ifdef MULTIPLICITY
8f872242 1220 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1221# endif
4d1ff10f
AB		 1222# ifdef USE_5005THREADS
1223 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1224# endif
ac5e8965
JH		 1225# ifdef USE_ITHREADS
1226 sv_catpv(PL_Sv," USE_ITHREADS");
1227# endif
10cc9d2a
JH		 1228# ifdef USE_64_BIT_INT
1229 sv_catpv(PL_Sv," USE_64_BIT_INT");
1230# endif
1231# ifdef USE_64_BIT_ALL
1232 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH		 1233# endif
1234# ifdef USE_LONG_DOUBLE
1235 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1236# endif
53430762
JH		 1237# ifdef USE_LARGE_FILES
1238 sv_catpv(PL_Sv," USE_LARGE_FILES");
1239# endif
ac5e8965
JH		 1240# ifdef USE_SOCKS
1241 sv_catpv(PL_Sv," USE_SOCKS");
1242# endif
b363f7ed
GS		 1243# ifdef PERL_IMPLICIT_CONTEXT
1244 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1245# endif
1246# ifdef PERL_IMPLICIT_SYS
1247 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1248# endif
3280af22 1249 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1250
6224f72b
GS		 1251#if defined(LOCAL_PATCH_COUNT)
1252 if (LOCAL_PATCH_COUNT > 0) {
1253 int i;
3280af22 1254 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1255 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1256 if (PL_localpatches[i])
cea2e8a9 1257 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS		 1258 }
1259 }
1260#endif
cea2e8a9 1261 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS		 1262#ifdef __DATE__
1263# ifdef __TIME__
cea2e8a9 1264 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1265# else
cea2e8a9 1266 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS		 1267# endif
1268#endif
3280af22 1269 sv_catpv(PL_Sv, "; \
6224f72b 1270$\"=\"\\n \"; \
69fcd688
JH		 1271@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1272#ifdef __CYGWIN__
1273 sv_catpv(PL_Sv,"\
1274push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1275#endif
1276 sv_catpv(PL_Sv, "\
6224f72b
GS		 1277print \" \\%ENV:\\n @env\\n\" if @env; \
1278print \" \\@INC:\\n @INC\\n\";");
1279 }
1280 else {
3280af22
NIS		 1281 PL_Sv = newSVpv("config_vars(qw(",0);
1282 sv_catpv(PL_Sv, ++s);
1283 sv_catpv(PL_Sv, "))");
6224f72b
GS		 1284 s += strlen(s);
1285 }
3280af22 1286 av_push(PL_preambleav, PL_Sv);
6224f72b
GS		 1287 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1288 goto reswitch;
1289 case 'x':
3280af22 1290 PL_doextract = TRUE;
6224f72b
GS		 1291 s++;
1292 if (*s)
f4c556ac 1293 cddir = s;
6224f72b
GS		 1294 break;
1295 case 0:
1296 break;
1297 case '-':
1298 if (!*++s || isSPACE(*s)) {
1299 argc--,argv++;
1300 goto switch_end;
1301 }
1302 /* catch use of gnu style long options */
1303 if (strEQ(s, "version")) {
1304 s = "v";
1305 goto reswitch;
1306 }
1307 if (strEQ(s, "help")) {
1308 s = "h";
1309 goto reswitch;
1310 }
1311 s--;
1312 /* FALL THROUGH */
1313 default:
cea2e8a9 1314 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW		 1315 }
1316 }
6224f72b 1317 switch_end:
7f9e821f 1318 sv_setsv(get_sv("/", TRUE), PL_rs);
54310121 1319
f675dbe5
CB		 1320 if (
1321#ifndef SECURE_INTERNAL_GETENV
1322 !PL_tainting &&
1323#endif
cf756827 1324 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1325 {
cf756827 1326 char *popt = s;
74288ac8
GS		 1327 while (isSPACE(*s))
1328 s++;
317ea90d 1329 if (*s == '-' && *(s+1) == 'T') {
22f7c9c9 1330 CHECK_MALLOC_TOO_LATE_FOR('T');
74288ac8 1331 PL_tainting = TRUE;
317ea90d
MS		 1332 PL_taint_warn = FALSE;
1333 }
74288ac8 1334 else {
cf756827 1335 char *popt_copy = Nullch;
74288ac8 1336 while (s && *s) {
4ea8f8fb 1337 char *d;
74288ac8
GS		 1338 while (isSPACE(*s))
1339 s++;
1340 if (*s == '-') {
1341 s++;
1342 if (isSPACE(*s))
1343 continue;
1344 }
4ea8f8fb 1345 d = s;
74288ac8
GS		 1346 if (!*s)
1347 break;
06492da6 1348 if (!strchr("DIMUdmtwA", *s))
cea2e8a9 1349 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS		 1350 while (++s && *s) {
1351 if (isSPACE(*s)) {
cf756827
GS		 1352 if (!popt_copy) {
1353 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1354 s = popt_copy + (s - popt);
1355 d = popt_copy + (d - popt);
1356 }
4ea8f8fb
MS		 1357 *s++ = '\0';
1358 break;
1359 }
1360 }
1c4db469 1361 if (*d == 't') {
317ea90d
MS		 1362 if( !PL_tainting ) {
1363 PL_taint_warn = TRUE;
1364 PL_tainting = TRUE;
1365 }
1c4db469
RGS		 1366 } else {
1367 moreswitches(d);
1368 }
6224f72b 1369 }
6224f72b
GS		 1370 }
1371 }
a0d0e21e 1372
317ea90d
MS		 1373 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1374 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1375 }
1376
6224f72b
GS		 1377 if (!scriptname)
1378 scriptname = argv[0];
3280af22 1379 if (PL_e_script) {
6224f72b
GS		 1380 argc++,argv--;
1381 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1382 }
1383 else if (scriptname == Nullch) {
1384#ifdef MSDOS
1385 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1386 moreswitches("h");
1387#endif
1388 scriptname = "-";
1389 }
1390
1391 init_perllib();
1392
1393 open_script(scriptname,dosearch,sv,&fdscript);
1394
1395 validate_suid(validarg, scriptname,fdscript);
1396
64ca3a65 1397#ifndef PERL_MICRO
0b5b802d
GS		 1398#if defined(SIGCHLD) || defined(SIGCLD)
1399 {
1400#ifndef SIGCHLD
1401# define SIGCHLD SIGCLD
1402#endif
1403 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1404 if (sigstate == SIG_IGN) {
1405 if (ckWARN(WARN_SIGNAL))
9014280d 1406 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
0b5b802d
GS		 1407 "Can't ignore signal CHLD, forcing to default");
1408 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1409 }
1410 }
1411#endif
64ca3a65 1412#endif
0b5b802d 1413
bf4acbe4
GS		 1414#ifdef MACOS_TRADITIONAL
1415 if (PL_doextract || gMacPerl_AlwaysExtract) {
1416#else
f4c556ac 1417 if (PL_doextract) {
bf4acbe4 1418#endif
6224f72b 1419 find_beginning();
f4c556ac
GS		 1420 if (cddir && PerlDir_chdir(cddir) < 0)
1421 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1422
1423 }
6224f72b 1424
3280af22
NIS		 1425 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1426 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1427 CvUNIQUE_on(PL_compcv);
1428
dd2155a4 1429 CvPADLIST(PL_compcv) = pad_new(0);
4d1ff10f 1430#ifdef USE_5005THREADS
533c011a
NIS		 1431 CvOWNER(PL_compcv) = 0;
1432 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1433 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1434#endif /* USE_5005THREADS */
6224f72b 1435
0c4f7ff0 1436 boot_core_PerlIO();
6224f72b 1437 boot_core_UNIVERSAL();
9a34ef1d 1438#ifndef PERL_MICRO
09bef843 1439 boot_core_xsutils();
9a34ef1d 1440#endif
6224f72b
GS		 1441
1442 if (xsinit)
acfe0abc 1443 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1444#ifndef PERL_MICRO
ed79a026 1445#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1446 init_os_extras();
6224f72b 1447#endif
64ca3a65 1448#endif
6224f72b 1449
29209bc5 1450#ifdef USE_SOCKS
1b9c9cf5
DH		 1451# ifdef HAS_SOCKS5_INIT
1452 socks5_init(argv[0]);
1453# else
29209bc5 1454 SOCKSinit(argv[0]);
1b9c9cf5 1455# endif
ac27b0f5 1456#endif
29209bc5 1457
6224f72b
GS		 1458 init_predump_symbols();
1459 /* init_postdump_symbols not currently designed to be called */
1460 /* more than once (ENV isn't cleared first, for example) */
1461 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1462 if (!PL_do_undump)
6224f72b
GS		 1463 init_postdump_symbols(argc,argv,env);
1464
a05d7ebb
JH		 1465 /* PL_unicode is turned on by -C or by $ENV{PERL_UNICODE}.
1466 * PL_utf8locale is conditionally turned on by
085a54d9 1467 * locale.c:Perl_init_i18nl10n() if the environment
a05d7ebb 1468 * look like the user wants to use UTF-8. */
06e66572
JH		 1469 if (PL_unicode) {
1470 /* Requires init_predump_symbols(). */
a05d7ebb 1471 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
06e66572
JH		 1472 IO* io;
1473 PerlIO* fp;
1474 SV* sv;
1475
a05d7ebb 1476 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
06e66572 1477 * and the default open disciplines. */
a05d7ebb
JH		 1478 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
1479 PL_stdingv && (io = GvIO(PL_stdingv)) &&
1480 (fp = IoIFP(io)))
1481 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1482 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
1483 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
1484 (fp = IoOFP(io)))
1485 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1486 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
1487 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
1488 (fp = IoOFP(io)))
1489 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1490 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
1491 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1492 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
1493 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
1494 if (in) {
1495 if (out)
1496 sv_setpvn(sv, ":utf8\0:utf8", 11);
1497 else
1498 sv_setpvn(sv, ":utf8\0", 6);
1499 }
1500 else if (out)
1501 sv_setpvn(sv, "\0:utf8", 6);
1502 SvSETMAGIC(sv);
1503 }
b310b053
JH		 1504 }
1505 }
1506
4ffa73a3
JH		 1507 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
1508 if (strEQ(s, "unsafe"))
1509 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
1510 else if (strEQ(s, "safe"))
1511 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
1512 else
1513 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
1514 }
1515
6224f72b
GS		 1516 init_lexer();
1517
1518 /* now parse the script */
1519
93189314 1520 SETERRNO(0,SS_NORMAL);
3280af22 1521 PL_error_count = 0;
bf4acbe4
GS		 1522#ifdef MACOS_TRADITIONAL
1523 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1524 if (PL_minus_c)
1525 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1526 else {
1527 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1528 MacPerl_MPWFileName(PL_origfilename));
1529 }
1530 }
1531#else
3280af22
NIS		 1532 if (yyparse() || PL_error_count) {
1533 if (PL_minus_c)
cea2e8a9 1534 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1535 else {
cea2e8a9 1536 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1537 PL_origfilename);
6224f72b
GS		 1538 }
1539 }
bf4acbe4 1540#endif
57843af0 1541 CopLINE_set(PL_curcop, 0);
3280af22
NIS		 1542 PL_curstash = PL_defstash;
1543 PL_preprocess = FALSE;
1544 if (PL_e_script) {
1545 SvREFCNT_dec(PL_e_script);
1546 PL_e_script = Nullsv;
6224f72b
GS		 1547 }
1548
3280af22 1549 if (PL_do_undump)
6224f72b
GS		 1550 my_unexec();
1551
57843af0
GS		 1552 if (isWARN_ONCE) {
1553 SAVECOPFILE(PL_curcop);
1554 SAVECOPLINE(PL_curcop);
3280af22 1555 gv_check(PL_defstash);
57843af0 1556 }
6224f72b
GS		 1557
1558 LEAVE;
1559 FREETMPS;
1560
1561#ifdef MYMALLOC
1562 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1563 dump_mstats("after compilation:");
1564#endif
1565
1566 ENTER;
3280af22 1567 PL_restartop = 0;
312caa8e 1568 return NULL;
6224f72b
GS		 1569}
1570
954c1994
GS		 1571/*
1572=for apidoc perl_run
1573
1574Tells a Perl interpreter to run. See L<perlembed>.
1575
1576=cut
1577*/
1578
6224f72b 1579int
0cb96387 1580perl_run(pTHXx)
6224f72b 1581{
6224f72b 1582 I32 oldscope;
14dd3ad8 1583 int ret = 0;
db36c5a1 1584 dJMPENV;
4d1ff10f 1585#ifdef USE_5005THREADS
cea2e8a9
GS		 1586 dTHX;
1587#endif
6224f72b 1588
3280af22 1589 oldscope = PL_scopestack_ix;
96e176bf
CL		 1590#ifdef VMS
1591 VMSISH_HUSHED = 0;
1592#endif
6224f72b 1593
14dd3ad8 1594#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1595 redo_body:
14dd3ad8
GS		 1596 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1597#else
1598 JMPENV_PUSH(ret);
1599#endif
6224f72b
GS		 1600 switch (ret) {
1601 case 1:
1602 cxstack_ix = -1; /* start context stack again */
312caa8e 1603 goto redo_body;
14dd3ad8
GS		 1604 case 0: /* normal completion */
1605#ifndef PERL_FLEXIBLE_EXCEPTIONS
1606 redo_body:
1607 run_body(oldscope);
1608#endif
1609 /* FALL THROUGH */
1610 case 2: /* my_exit() */
3280af22 1611 while (PL_scopestack_ix > oldscope)
6224f72b
GS		 1612 LEAVE;
1613 FREETMPS;
3280af22 1614 PL_curstash = PL_defstash;
3a1ee7e8 1615 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB		 1616 PL_endav && !PL_minus_c)
1617 call_list(oldscope, PL_endav);
6224f72b
GS		 1618#ifdef MYMALLOC
1619 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1620 dump_mstats("after execution: ");
1621#endif
14dd3ad8
GS		 1622 ret = STATUS_NATIVE_EXPORT;
1623 break;
6224f72b 1624 case 3:
312caa8e
CS		 1625 if (PL_restartop) {
1626 POPSTACK_TO(PL_mainstack);
1627 goto redo_body;
6224f72b 1628 }
bf49b057 1629 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1630 FREETMPS;
14dd3ad8
GS		 1631 ret = 1;
1632 break;
6224f72b
GS		 1633 }
1634
14dd3ad8
GS		 1635 JMPENV_POP;
1636 return ret;
312caa8e
CS		 1637}
1638
14dd3ad8 1639#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1640STATIC void *
14dd3ad8 1641S_vrun_body(pTHX_ va_list args)
312caa8e 1642{
312caa8e
CS		 1643 I32 oldscope = va_arg(args, I32);
1644
14dd3ad8
GS		 1645 return run_body(oldscope);
1646}
1647#endif
1648
1649
1650STATIC void *
1651S_run_body(pTHX_ I32 oldscope)
1652{
6224f72b 1653 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1654 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1655
3280af22 1656 if (!PL_restartop) {
6224f72b
GS		 1657 DEBUG_x(dump_all());
1658 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH		 1659 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1660 PTR2UV(thr)));
6224f72b 1661
3280af22 1662 if (PL_minus_c) {
bf4acbe4 1663#ifdef MACOS_TRADITIONAL
e69a2255
JH		 1664 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
1665 (gMacPerl_ErrorFormat ? "# " : ""),
1666 MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1667#else
bf49b057 1668 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1669#endif
6224f72b
GS		 1670 my_exit(0);
1671 }
3280af22 1672 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1673 sv_setiv(PL_DBsingle, 1);
3280af22
NIS		 1674 if (PL_initav)
1675 call_list(oldscope, PL_initav);
6224f72b
GS		 1676 }
1677
1678 /* do it */
1679
3280af22 1680 if (PL_restartop) {
533c011a 1681 PL_op = PL_restartop;
3280af22 1682 PL_restartop = 0;
cea2e8a9 1683 CALLRUNOPS(aTHX);
6224f72b 1684 }
3280af22
NIS		 1685 else if (PL_main_start) {
1686 CvDEPTH(PL_main_cv) = 1;
533c011a 1687 PL_op = PL_main_start;
cea2e8a9 1688 CALLRUNOPS(aTHX);
6224f72b
GS		 1689 }
1690
f6b3007c
JH		 1691 my_exit(0);
1692 /* NOTREACHED */
312caa8e 1693 return NULL;
6224f72b
GS		 1694}
1695
954c1994 1696/*
ccfc67b7
JH		 1697=head1 SV Manipulation Functions
1698
954c1994
GS		 1699=for apidoc p||get_sv
1700
1701Returns the SV of the specified Perl scalar. If C<create> is set and the
1702Perl variable does not exist then it will be created. If C<create> is not
1703set and the variable does not exist then NULL is returned.
1704
1705=cut
1706*/
1707
6224f72b 1708SV*
864dbfa3 1709Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS		 1710{
1711 GV *gv;
4d1ff10f 1712#ifdef USE_5005THREADS
6224f72b
GS		 1713 if (name[1] == '\0' && !isALPHA(name[0])) {
1714 PADOFFSET tmp = find_threadsv(name);
411caa50 1715 if (tmp != NOT_IN_PAD)
6224f72b 1716 return THREADSV(tmp);
6224f72b 1717 }
4d1ff10f 1718#endif /* USE_5005THREADS */
6224f72b
GS		 1719 gv = gv_fetchpv(name, create, SVt_PV);
1720 if (gv)
1721 return GvSV(gv);
1722 return Nullsv;
1723}
1724
954c1994 1725/*
ccfc67b7
JH		 1726=head1 Array Manipulation Functions
1727
954c1994
GS		 1728=for apidoc p||get_av
1729
1730Returns the AV of the specified Perl array. If C<create> is set and the
1731Perl variable does not exist then it will be created. If C<create> is not
1732set and the variable does not exist then NULL is returned.
1733
1734=cut
1735*/
1736
6224f72b 1737AV*
864dbfa3 1738Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS		 1739{
1740 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1741 if (create)
1742 return GvAVn(gv);
1743 if (gv)
1744 return GvAV(gv);
1745 return Nullav;
1746}
1747
954c1994 1748/*
ccfc67b7
JH		 1749=head1 Hash Manipulation Functions
1750
954c1994
GS		 1751=for apidoc p||get_hv
1752
1753Returns the HV of the specified Perl hash. If C<create> is set and the
1754Perl variable does not exist then it will be created. If C<create> is not
1755set and the variable does not exist then NULL is returned.
1756
1757=cut
1758*/
1759
6224f72b 1760HV*
864dbfa3 1761Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1762{
a0d0e21e
LW		 1763 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1764 if (create)
1765 return GvHVn(gv);
1766 if (gv)
1767 return GvHV(gv);
1768 return Nullhv;
1769}
1770
954c1994 1771/*
ccfc67b7
JH		 1772=head1 CV Manipulation Functions
1773
954c1994
GS		 1774=for apidoc p||get_cv
1775
1776Returns the CV of the specified Perl subroutine. If C<create> is set and
1777the Perl subroutine does not exist then it will be declared (which has the
1778same effect as saying C<sub name;>). If C<create> is not set and the
1779subroutine does not exist then NULL is returned.
1780
1781=cut
1782*/
1783
a0d0e21e 1784CV*
864dbfa3 1785Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW		 1786{
1787 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1788 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS		 1789 /* XXX this is probably not what they think they're getting.
1790 * It has the same effect as "sub name;", i.e. just a forward
1791 * declaration! */
8ebc5c01 1792 if (create && !GvCVu(gv))
774d564b 1793 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1794 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1795 Nullop,
a0d0e21e
LW		 1796 Nullop);
1797 if (gv)
8ebc5c01 1798 return GvCVu(gv);
a0d0e21e
LW		 1799 return Nullcv;
1800}
1801
79072805
LW		 1802/* Be sure to refetch the stack pointer after calling these routines. */
1803
954c1994 1804/*
ccfc67b7
JH		 1805
1806=head1 Callback Functions
1807
954c1994
GS		 1808=for apidoc p||call_argv
1809
1810Performs a callback to the specified Perl sub. See L<perlcall>.
1811
1812=cut
1813*/
1814
a0d0e21e 1815I32
864dbfa3 1816Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1817
8ac85365
NIS		 1818 /* See G_* flags in cop.h */
1819 /* null terminated arg list */
8990e307 1820{
a0d0e21e 1821 dSP;
8990e307 1822
924508f0 1823 PUSHMARK(SP);
a0d0e21e 1824 if (argv) {
8990e307 1825 while (*argv) {
a0d0e21e 1826 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW		 1827 argv++;
1828 }
a0d0e21e 1829 PUTBACK;
8990e307 1830 }
864dbfa3 1831 return call_pv(sub_name, flags);
8990e307
LW		 1832}
1833
954c1994
GS		 1834/*
1835=for apidoc p||call_pv
1836
1837Performs a callback to the specified Perl sub. See L<perlcall>.
1838
1839=cut
1840*/
1841
a0d0e21e 1842I32
864dbfa3 1843Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS		 1844 /* name of the subroutine */
1845 /* See G_* flags in cop.h */
a0d0e21e 1846{
864dbfa3 1847 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW		 1848}
1849
954c1994
GS		 1850/*
1851=for apidoc p||call_method
1852
1853Performs a callback to the specified Perl method. The blessed object must
1854be on the stack. See L<perlcall>.
1855
1856=cut
1857*/
1858
a0d0e21e 1859I32
864dbfa3 1860Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS		 1861 /* name of the subroutine */
1862 /* See G_* flags in cop.h */
a0d0e21e 1863{
968b3946 1864 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW		 1865}
1866
1867/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS		 1868/*
1869=for apidoc p||call_sv
1870
1871Performs a callback to the Perl sub whose name is in the SV. See
1872L<perlcall>.
1873
1874=cut
1875*/
1876
a0d0e21e 1877I32
864dbfa3 1878Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1879 /* See G_* flags in cop.h */
a0d0e21e 1880{
924508f0 1881 dSP;
a0d0e21e 1882 LOGOP myop; /* fake syntax tree node */
968b3946 1883 UNOP method_op;
aa689395 1884 I32 oldmark;
13689cfe 1885 volatile I32 retval = 0;
a0d0e21e 1886 I32 oldscope;
54310121 1887 bool oldcatch = CATCH_GET;
6224f72b 1888 int ret;
533c011a 1889 OP* oldop = PL_op;
db36c5a1 1890 dJMPENV;
1e422769 1891
a0d0e21e
LW		 1892 if (flags & G_DISCARD) {
1893 ENTER;
1894 SAVETMPS;
1895 }
1896
aa689395 1897 Zero(&myop, 1, LOGOP);
54310121 1898 myop.op_next = Nullop;
f51d4af5 1899 if (!(flags & G_NOARGS))
aa689395 1900 myop.op_flags |= OPf_STACKED;
54310121 1901 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1902 (flags & G_ARRAY) ? OPf_WANT_LIST :
1903 OPf_WANT_SCALAR);
462e5cf6 1904 SAVEOP();
533c011a 1905 PL_op = (OP*)&myop;
aa689395 1906
3280af22
NIS		 1907 EXTEND(PL_stack_sp, 1);
1908 *++PL_stack_sp = sv;
aa689395 1909 oldmark = TOPMARK;
3280af22 1910 oldscope = PL_scopestack_ix;
a0d0e21e 1911
3280af22 1912 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1913 /* Handle first BEGIN of -d. */
3280af22 1914 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24 1915 /* Try harder, since this may have been a sighandler, thus
1916 * curstash may be meaningless. */
3280af22 1917 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1918 && !(flags & G_NODEBUG))
533c011a 1919 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1920
968b3946
GS		 1921 if (flags & G_METHOD) {
1922 Zero(&method_op, 1, UNOP);
1923 method_op.op_next = PL_op;
1924 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1925 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1926 PL_op = (OP*)&method_op;
968b3946
GS		 1927 }
1928
312caa8e 1929 if (!(flags & G_EVAL)) {
0cdb2077 1930 CATCH_SET(TRUE);
14dd3ad8 1931 call_body((OP*)&myop, FALSE);
312caa8e 1932 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1933 CATCH_SET(oldcatch);
312caa8e
CS		 1934 }
1935 else {
d78bda3d 1936 myop.op_other = (OP*)&myop;
3280af22 1937 PL_markstack_ptr--;
4633a7c4
LW		 1938 /* we're trying to emulate pp_entertry() here */
1939 {
c09156bb 1940 register PERL_CONTEXT *cx;
54310121 1941 I32 gimme = GIMME_V;
ac27b0f5 1942
4633a7c4
LW		 1943 ENTER;
1944 SAVETMPS;
ac27b0f5 1945
968b3946 1946 push_return(Nullop);
1d76a5c3 1947 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1948 PUSHEVAL(cx, 0, 0);
533c011a 1949 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1950
faef0170 1951 PL_in_eval = EVAL_INEVAL;
4633a7c4 1952 if (flags & G_KEEPERR)
faef0170 1953 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1954 else
38a03e6e 1955 sv_setpv(ERRSV,"");
4633a7c4 1956 }
3280af22 1957 PL_markstack_ptr++;
a0d0e21e 1958
14dd3ad8
GS		 1959#ifdef PERL_FLEXIBLE_EXCEPTIONS
1960 redo_body:
1961 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1962 (OP*)&myop, FALSE);
14dd3ad8
GS		 1963#else
1964 JMPENV_PUSH(ret);
1965#endif
6224f72b
GS		 1966 switch (ret) {
1967 case 0:
14dd3ad8
GS		 1968#ifndef PERL_FLEXIBLE_EXCEPTIONS
1969 redo_body:
1970 call_body((OP*)&myop, FALSE);
1971#endif
312caa8e
CS		 1972 retval = PL_stack_sp - (PL_stack_base + oldmark);
1973 if (!(flags & G_KEEPERR))
1974 sv_setpv(ERRSV,"");
a0d0e21e 1975 break;
6224f72b 1976 case 1:
f86702cc 1977 STATUS_ALL_FAILURE;
a0d0e21e 1978 /* FALL THROUGH */
6224f72b 1979 case 2:
a0d0e21e 1980 /* my_exit() was called */
3280af22 1981 PL_curstash = PL_defstash;
a0d0e21e 1982 FREETMPS;
14dd3ad8 1983 JMPENV_POP;
cc3604b1 1984 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1985 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1986 my_exit_jump();
a0d0e21e 1987 /* NOTREACHED */
6224f72b 1988 case 3:
3280af22 1989 if (PL_restartop) {
533c011a 1990 PL_op = PL_restartop;
3280af22 1991 PL_restartop = 0;
312caa8e 1992 goto redo_body;
a0d0e21e 1993 }
3280af22 1994 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 1995 if (flags & G_ARRAY)
1996 retval = 0;
1997 else {
1998 retval = 1;
3280af22 1999 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 2000 }
312caa8e 2001 break;
a0d0e21e 2002 }
a0d0e21e 2003
3280af22 2004 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW		 2005 SV **newsp;
2006 PMOP *newpm;
2007 I32 gimme;
c09156bb 2008 register PERL_CONTEXT *cx;
a0a2876f
LW		 2009 I32 optype;
2010
2011 POPBLOCK(cx,newpm);
2012 POPEVAL(cx);
2013 pop_return();
3280af22 2014 PL_curpm = newpm;
a0a2876f 2015 LEAVE;
a0d0e21e 2016 }
14dd3ad8 2017 JMPENV_POP;
a0d0e21e 2018 }
1e422769 2019
a0d0e21e 2020 if (flags & G_DISCARD) {
3280af22 2021 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW		 2022 retval = 0;
2023 FREETMPS;
2024 LEAVE;
2025 }
533c011a 2026 PL_op = oldop;
a0d0e21e
LW		 2027 return retval;
2028}
2029
14dd3ad8 2030#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2031STATIC void *
14dd3ad8 2032S_vcall_body(pTHX_ va_list args)
312caa8e
CS		 2033{
2034 OP *myop = va_arg(args, OP*);
2035 int is_eval = va_arg(args, int);
2036
14dd3ad8 2037 call_body(myop, is_eval);
312caa8e
CS		 2038 return NULL;
2039}
14dd3ad8 2040#endif
312caa8e
CS		 2041
2042STATIC void
14dd3ad8 2043S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 2044{
312caa8e
CS		 2045 if (PL_op == myop) {
2046 if (is_eval)
f807eda9 2047 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 2048 else
f807eda9 2049 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS		 2050 }
2051 if (PL_op)
cea2e8a9 2052 CALLRUNOPS(aTHX);
312caa8e
CS		 2053}
2054
6e72f9df 2055/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 2056
954c1994
GS		 2057/*
2058=for apidoc p||eval_sv
2059
2060Tells Perl to C<eval> the string in the SV.
2061
2062=cut
2063*/
2064
a0d0e21e 2065I32
864dbfa3 2066Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 2067
8ac85365 2068 /* See G_* flags in cop.h */
a0d0e21e 2069{
924508f0 2070 dSP;
a0d0e21e 2071 UNOP myop; /* fake syntax tree node */
8fa7f367 2072 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 2073 volatile I32 retval = 0;
4633a7c4 2074 I32 oldscope;
6224f72b 2075 int ret;
533c011a 2076 OP* oldop = PL_op;
db36c5a1 2077 dJMPENV;
84902520 2078
4633a7c4
LW		 2079 if (flags & G_DISCARD) {
2080 ENTER;
2081 SAVETMPS;
2082 }
2083
462e5cf6 2084 SAVEOP();
533c011a
NIS		 2085 PL_op = (OP*)&myop;
2086 Zero(PL_op, 1, UNOP);
3280af22
NIS		 2087 EXTEND(PL_stack_sp, 1);
2088 *++PL_stack_sp = sv;
2089 oldscope = PL_scopestack_ix;
79072805 2090
4633a7c4
LW		 2091 if (!(flags & G_NOARGS))
2092 myop.op_flags = OPf_STACKED;
79072805 2093 myop.op_next = Nullop;
6e72f9df 2094 myop.op_type = OP_ENTEREVAL;
54310121 2095 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2096 (flags & G_ARRAY) ? OPf_WANT_LIST :
2097 OPf_WANT_SCALAR);
6e72f9df 2098 if (flags & G_KEEPERR)
2099 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2100
14dd3ad8 2101#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2102 redo_body:
14dd3ad8 2103 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2104 (OP*)&myop, TRUE);
14dd3ad8
GS		 2105#else
2106 JMPENV_PUSH(ret);
2107#endif
6224f72b
GS		 2108 switch (ret) {
2109 case 0:
14dd3ad8
GS		 2110#ifndef PERL_FLEXIBLE_EXCEPTIONS
2111 redo_body:
2112 call_body((OP*)&myop,TRUE);
2113#endif
312caa8e
CS		 2114 retval = PL_stack_sp - (PL_stack_base + oldmark);
2115 if (!(flags & G_KEEPERR))
2116 sv_setpv(ERRSV,"");
4633a7c4 2117 break;
6224f72b 2118 case 1:
f86702cc 2119 STATUS_ALL_FAILURE;
4633a7c4 2120 /* FALL THROUGH */
6224f72b 2121 case 2:
4633a7c4 2122 /* my_exit() was called */
3280af22 2123 PL_curstash = PL_defstash;
4633a7c4 2124 FREETMPS;
14dd3ad8 2125 JMPENV_POP;
cc3604b1 2126 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2127 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2128 my_exit_jump();
4633a7c4 2129 /* NOTREACHED */
6224f72b 2130 case 3:
3280af22 2131 if (PL_restartop) {
533c011a 2132 PL_op = PL_restartop;
3280af22 2133 PL_restartop = 0;
312caa8e 2134 goto redo_body;
4633a7c4 2135 }
3280af22 2136 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2137 if (flags & G_ARRAY)
2138 retval = 0;
2139 else {
2140 retval = 1;
3280af22 2141 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2142 }
312caa8e 2143 break;
4633a7c4
LW		 2144 }
2145
14dd3ad8 2146 JMPENV_POP;
4633a7c4 2147 if (flags & G_DISCARD) {
3280af22 2148 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW		 2149 retval = 0;
2150 FREETMPS;
2151 LEAVE;
2152 }
533c011a 2153 PL_op = oldop;
4633a7c4
LW		 2154 return retval;
2155}
2156
954c1994
GS		 2157/*
2158=for apidoc p||eval_pv
2159
2160Tells Perl to C<eval> the given string and return an SV* result.
2161
2162=cut
2163*/
2164
137443ea 2165SV*
864dbfa3 2166Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 2167{
2168 dSP;
2169 SV* sv = newSVpv(p, 0);
2170
864dbfa3 2171 eval_sv(sv, G_SCALAR);
137443ea 2172 SvREFCNT_dec(sv);
2173
2174 SPAGAIN;
2175 sv = POPs;
2176 PUTBACK;
2177
2d8e6c8d
GS		 2178 if (croak_on_error && SvTRUE(ERRSV)) {
2179 STRLEN n_a;
cea2e8a9 2180 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2181 }
137443ea 2182
2183 return sv;
2184}
2185
4633a7c4
LW		 2186/* Require a module. */
2187
954c1994 2188/*
ccfc67b7
JH		 2189=head1 Embedding Functions
2190
954c1994
GS		 2191=for apidoc p||require_pv
2192
7d3fb230
BS		 2193Tells Perl to C<require> the file named by the string argument. It is
2194analogous to the Perl code C<eval "require '$file'">. It's even
2307c6d0 2195implemented that way; consider using load_module instead.
954c1994 2196
7d3fb230 2197=cut */
954c1994 2198
4633a7c4 2199void
864dbfa3 2200Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2201{
d3acc0f7
JP		 2202 SV* sv;
2203 dSP;
e788e7d3 2204 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP		 2205 PUTBACK;
2206 sv = sv_newmortal();
4633a7c4
LW		 2207 sv_setpv(sv, "require '");
2208 sv_catpv(sv, pv);
2209 sv_catpv(sv, "'");
864dbfa3 2210 eval_sv(sv, G_DISCARD);
d3acc0f7
JP		 2211 SPAGAIN;
2212 POPSTACK;
79072805
LW		 2213}
2214
79072805 2215void
864dbfa3 2216Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW		 2217{
2218 register GV *gv;
2219
155aba94 2220 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2221 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW		 2222}
2223
76e3520e 2224STATIC void
cea2e8a9 2225S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2226{
ab821d7f 2227 /* This message really ought to be max 23 lines.
75c72d73 2228 * Removed -h because the user already knows that option. Others? */
fb73857a 2229
76e3520e 2230 static char *usage_msg[] = {
fb73857a 2231"-0[octal] specify record separator (\\0, if no argument)",
2232"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2233"-C enable native wide character system interfaces",
1950ee41 2234"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS		 2235"-d[:debugger] run program under debugger",
2236"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2237"-e 'command' one line of program (several -e's allowed, omit programfile)",
2238"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2239"-i[extension] edit <> files in place (makes backup if extension supplied)",
2240"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2241"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS		 2242"-[mM][-]module execute `use/no module...' before executing program",
2243"-n assume 'while (<>) { ... }' loop around program",
2244"-p assume loop like -n but print line also, like sed",
2245"-P run program through C preprocessor before compilation",
2246"-s enable rudimentary parsing for switches after programfile",
2247"-S look for programfile using PATH environment variable",
2248"-T enable tainting checks",
9cbc33e8 2249"-t enable tainting warnings",
aac3bd0d 2250"-u dump core after parsing program",
fb73857a 2251"-U allow unsafe operations",
aac3bd0d
GS		 2252"-v print version, subversion (includes VERY IMPORTANT perl info)",
2253"-V[:variable] print configuration summary (or a single Config.pm variable)",
2254"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS		 2255"-W enable all warnings",
2256"-X disable all warnings",
fb73857a 2257"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2258"\n",
2259NULL
2260};
76e3520e 2261 char **p = usage_msg;
fb73857a 2262
b0e47665
GS		 2263 PerlIO_printf(PerlIO_stdout(),
2264 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2265 name);
fb73857a 2266 while (*p)
b0e47665 2267 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW		 2268}
2269
b4ab917c
DM		 2270/* convert a string of -D options (or digits) into an int.
2271 * sets *s to point to the char after the options */
2272
2273#ifdef DEBUGGING
2274int
2275Perl_get_debug_opts(pTHX_ char **s)
2276{
2277 int i = 0;
2278 if (isALPHA(**s)) {
2279 /* if adding extra options, remember to update DEBUG_MASK */
2280 static char debopts[] = "psltocPmfrxu HXDSTRJvC";
2281
2282 for (; isALNUM(**s); (*s)++) {
2283 char *d = strchr(debopts,**s);
2284 if (d)
2285 i |= 1 << (d - debopts);
2286 else if (ckWARN_d(WARN_DEBUGGING))
2287 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2288 "invalid option -D%c\n", **s);
2289 }
2290 }
2291 else {
2292 i = atoi(*s);
2293 for (; isALNUM(**s); (*s)++) ;
2294 }
2295# ifdef EBCDIC
2296 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2297 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2298 "-Dp not implemented on this platform\n");
2299# endif
2300 return i;
2301}
2302#endif
2303
79072805
LW		 2304/* This routine handles any switches that can be given during run */
2305
2306char *
864dbfa3 2307Perl_moreswitches(pTHX_ char *s)
79072805 2308{
ba210ebe 2309 STRLEN numlen;
84c133a0 2310 UV rschar;
79072805
LW		 2311
2312 switch (*s) {
2313 case '0':
a863c7d1 2314 {
f2095865
JH		 2315 I32 flags = 0;
2316
2317 SvREFCNT_dec(PL_rs);
2318 if (s[1] == 'x' && s[2]) {
2319 char *e;
2320 U8 *tmps;
2321
2322 for (s += 2, e = s; *e; e++);
2323 numlen = e - s;
2324 flags = PERL_SCAN_SILENT_ILLDIGIT;
2325 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2326 if (s + numlen < e) {
2327 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2328 numlen = 0;
2329 s--;
2330 }
2331 PL_rs = newSVpvn("", 0);
c5661c80 2332 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
f2095865
JH		 2333 tmps = (U8*)SvPVX(PL_rs);
2334 uvchr_to_utf8(tmps, rschar);
2335 SvCUR_set(PL_rs, UNISKIP(rschar));
2336 SvUTF8_on(PL_rs);
2337 }
2338 else {
2339 numlen = 4;
2340 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2341 if (rschar & ~((U8)~0))
2342 PL_rs = &PL_sv_undef;
2343 else if (!rschar && numlen >= 2)
2344 PL_rs = newSVpvn("", 0);
2345 else {
2346 char ch = (char)rschar;
2347 PL_rs = newSVpvn(&ch, 1);
2348 }
2349 }
2350 return s + numlen;
a863c7d1 2351 }
46487f74 2352 case 'C':
a05d7ebb
JH		 2353 s++;
2354 PL_unicode = parse_unicode_opts(&s);
46487f74 2355 return s;
2304df62 2356 case 'F':
3280af22 2357 PL_minus_F = TRUE;
ebce5377
RGS		 2358 PL_splitstr = ++s;
2359 while (*s && !isSPACE(*s)) ++s;
2360 *s = '\0';
2361 PL_splitstr = savepv(PL_splitstr);
2304df62 2362 return s;
79072805 2363 case 'a':
3280af22 2364 PL_minus_a = TRUE;
79072805
LW		 2365 s++;
2366 return s;
2367 case 'c':
3280af22 2368 PL_minus_c = TRUE;
79072805
LW		 2369 s++;
2370 return s;
2371 case 'd':
bbce6d69 2372 forbid_setid("-d");
4633a7c4 2373 s++;
70c94a19
RR		 2374 /* The following permits -d:Mod to accepts arguments following an =
2375 in the fashion that -MSome::Mod does. */
2376 if (*s == ':' || *s == '=') {
2377 char *start;
2378 SV *sv;
2379 sv = newSVpv("use Devel::", 0);
2380 start = ++s;
2381 /* We now allow -d:Module=Foo,Bar */
2382 while(isALNUM(*s) || *s==':') ++s;
2383 if (*s != '=')
2384 sv_catpv(sv, start);
2385 else {
2386 sv_catpvn(sv, start, s-start);
2387 sv_catpv(sv, " split(/,/,q{");
2388 sv_catpv(sv, ++s);
2389 sv_catpv(sv, "})");
2390 }
4633a7c4 2391 s += strlen(s);
70c94a19 2392 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2393 }
ed094faf 2394 if (!PL_perldb) {
3280af22 2395 PL_perldb = PERLDB_ALL;
a0d0e21e 2396 init_debugger();
ed094faf 2397 }
79072805
LW		 2398 return s;
2399 case 'D':
0453d815 2400 {
79072805 2401#ifdef DEBUGGING
bbce6d69 2402 forbid_setid("-D");
b4ab917c
DM		 2403 s++;
2404 PL_debug = get_debug_opts(&s) | DEBUG_TOP_FLAG;
12a43e32 2405#else /* !DEBUGGING */
0453d815 2406 if (ckWARN_d(WARN_DEBUGGING))
9014280d 2407 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
0453d815 2408 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2409 for (s++; isALNUM(*s); s++) ;
79072805
LW		 2410#endif
2411 /*SUPPRESS 530*/
2412 return s;
0453d815 2413 }
4633a7c4 2414 case 'h':
ac27b0f5 2415 usage(PL_origargv[0]);
7ca617d0 2416 my_exit(0);
79072805 2417 case 'i':
3280af22
NIS		 2418 if (PL_inplace)
2419 Safefree(PL_inplace);
c030f24b
GH		 2420#if defined(__CYGWIN__) /* do backup extension automagically */
2421 if (*(s+1) == '\0') {
2422 PL_inplace = savepv(".bak");
2423 return s+1;
2424 }
2425#endif /* __CYGWIN__ */
3280af22 2426 PL_inplace = savepv(s+1);
79072805 2427 /*SUPPRESS 530*/
3280af22 2428 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2429 if (*s) {
fb73857a 2430 *s++ = '\0';
7b8d334a
GS		 2431 if (*s == '-') /* Additional switches on #! line. */
2432 s++;
2433 }
fb73857a 2434 return s;
4e49a025 2435 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2436 forbid_setid("-I");
fb73857a 2437 ++s;
2438 while (*s && isSPACE(*s))
2439 ++s;
2440 if (*s) {
774d564b 2441 char *e, *p;
0df16ed7
GS		 2442 p = s;
2443 /* ignore trailing spaces (possibly followed by other switches) */
2444 do {
2445 for (e = p; *e && !isSPACE(*e); e++) ;
2446 p = e;
2447 while (isSPACE(*p))
2448 p++;
2449 } while (*p && *p != '-');
2450 e = savepvn(s, e-s);
574c798a 2451 incpush(e, TRUE, TRUE, FALSE);
0df16ed7
GS		 2452 Safefree(e);
2453 s = p;
2454 if (*s == '-')
2455 s++;
79072805
LW		 2456 }
2457 else
a67e862a 2458 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2459 return s;
79072805 2460 case 'l':
3280af22 2461 PL_minus_l = TRUE;
79072805 2462 s++;
7889fe52
NIS		 2463 if (PL_ors_sv) {
2464 SvREFCNT_dec(PL_ors_sv);
2465 PL_ors_sv = Nullsv;
2466 }
79072805 2467 if (isDIGIT(*s)) {
53305cf1 2468 I32 flags = 0;
7889fe52 2469 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC		 2470 numlen = 3 + (*s == '0');
2471 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW		 2472 s += numlen;
2473 }
2474 else {
8bfdd7d9 2475 if (RsPARA(PL_rs)) {
7889fe52
NIS		 2476 PL_ors_sv = newSVpvn("\n\n",2);
2477 }
2478 else {
8bfdd7d9 2479 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2480 }
79072805
LW		 2481 }
2482 return s;
06492da6
SF		 2483 case 'A':
2484 forbid_setid("-A");
930366bd
RGS		 2485 if (!PL_preambleav)
2486 PL_preambleav = newAV();
06492da6 2487 if (*++s) {
930366bd 2488 SV *sv = newSVpvn("use assertions::activate split(/,/,q{",37);
06492da6
SF		 2489 sv_catpv(sv,s);
2490 sv_catpv(sv,"})");
2491 s+=strlen(s);
06492da6
SF		 2492 av_push(PL_preambleav, sv);
2493 }
2494 else
930366bd 2495 av_push(PL_preambleav, newSVpvn("use assertions::activate",24));
06492da6 2496 return s;
1a30305b 2497 case 'M':
bbce6d69 2498 forbid_setid("-M"); /* XXX ? */
1a30305b 2499 /* FALL THROUGH */
2500 case 'm':
bbce6d69 2501 forbid_setid("-m"); /* XXX ? */
1a30305b 2502 if (*++s) {
a5f75d66 2503 char *start;
11343788 2504 SV *sv;
a5f75d66
AD		 2505 char *use = "use ";
2506 /* -M-foo == 'no foo' */
2507 if (*s == '-') { use = "no "; ++s; }
11343788 2508 sv = newSVpv(use,0);
a5f75d66 2509 start = s;
1a30305b 2510 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd 2511 while(isALNUM(*s) || *s==':') ++s;
2512 if (*s != '=') {
11343788 2513 sv_catpv(sv, start);
c07a80fd 2514 if (*(start-1) == 'm') {
2515 if (*s != '\0')
cea2e8a9 2516 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2517 sv_catpv( sv, " ()");
c07a80fd 2518 }
2519 } else {
6df41af2 2520 if (s == start)
be98fb35
GS		 2521 Perl_croak(aTHX_ "Module name required with -%c option",
2522 s[-1]);
11343788
MB		 2523 sv_catpvn(sv, start, s-start);
2524 sv_catpv(sv, " split(/,/,q{");
2525 sv_catpv(sv, ++s);
2526 sv_catpv(sv, "})");
c07a80fd 2527 }
1a30305b 2528 s += strlen(s);
5c831c24 2529 if (!PL_preambleav)
3280af22
NIS		 2530 PL_preambleav = newAV();
2531 av_push(PL_preambleav, sv);
1a30305b 2532 }
2533 else
cea2e8a9 2534 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2535 return s;
79072805 2536 case 'n':
3280af22 2537 PL_minus_n = TRUE;
79072805
LW		 2538 s++;
2539 return s;
2540 case 'p':
3280af22 2541 PL_minus_p = TRUE;
79072805
LW		 2542 s++;
2543 return s;
2544 case 's':
bbce6d69 2545 forbid_setid("-s");
3280af22 2546 PL_doswitches = TRUE;
79072805
LW		 2547 s++;
2548 return s;
6537fe72
MS		 2549 case 't':
2550 if (!PL_tainting)
22f7c9c9 2551 TOO_LATE_FOR('t');
6537fe72
MS		 2552 s++;
2553 return s;
463ee0b2 2554 case 'T':
3280af22 2555 if (!PL_tainting)
22f7c9c9 2556 TOO_LATE_FOR('T');
463ee0b2
LW		 2557 s++;
2558 return s;
79072805 2559 case 'u':
bf4acbe4
GS		 2560#ifdef MACOS_TRADITIONAL
2561 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2562#endif
3280af22 2563 PL_do_undump = TRUE;
79072805
LW		 2564 s++;
2565 return s;
2566 case 'U':
3280af22 2567 PL_unsafe = TRUE;
79072805
LW		 2568 s++;
2569 return s;
2570 case 'v':
8e9464f1 2571#if !defined(DGUX)
b0e47665 2572 PerlIO_printf(PerlIO_stdout(),
d2560b70 2573 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2574 PL_patchlevel, ARCHNAME));
8e9464f1
JH		 2575#else /* DGUX */
2576/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2577 PerlIO_printf(PerlIO_stdout(),
2578 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2579 PerlIO_printf(PerlIO_stdout(),
2580 Perl_form(aTHX_ " built under %s at %s %s\n",
2581 OSNAME, __DATE__, __TIME__));
2582 PerlIO_printf(PerlIO_stdout(),
2583 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2584 OSVERS));
8e9464f1
JH		 2585#endif /* !DGUX */
2586
fb73857a 2587#if defined(LOCAL_PATCH_COUNT)
2588 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS		 2589 PerlIO_printf(PerlIO_stdout(),
2590 "\n(with %d registered patch%s, "
2591 "see perl -V for more detail)",
2592 (int)LOCAL_PATCH_COUNT,
2593 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2594#endif
1a30305b 2595
b0e47665 2596 PerlIO_printf(PerlIO_stdout(),
4c79ee7a 2597 "\n\nCopyright 1987-2003, Larry Wall\n");
eae9c151
JH		 2598#ifdef MACOS_TRADITIONAL
2599 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2600 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 2601 "maintained by Chris Nandor\n");
eae9c151 2602#endif
79072805 2603#ifdef MSDOS
b0e47665
GS		 2604 PerlIO_printf(PerlIO_stdout(),
2605 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff 2606#endif
2607#ifdef DJGPP
b0e47665
GS		 2608 PerlIO_printf(PerlIO_stdout(),
2609 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2610 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2611#endif
79072805 2612#ifdef OS2
b0e47665
GS		 2613 PerlIO_printf(PerlIO_stdout(),
2614 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 2615 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2616#endif
79072805 2617#ifdef atarist
b0e47665
GS		 2618 PerlIO_printf(PerlIO_stdout(),
2619 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2620#endif
a3f9223b 2621#ifdef __BEOS__
b0e47665
GS		 2622 PerlIO_printf(PerlIO_stdout(),
2623 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2624#endif
1d84e8df 2625#ifdef MPE
b0e47665 2626 PerlIO_printf(PerlIO_stdout(),
e583a879 2627 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
1d84e8df 2628#endif
9d116dd7 2629#ifdef OEMVS
b0e47665
GS		 2630 PerlIO_printf(PerlIO_stdout(),
2631 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2632#endif
495c5fdc 2633#ifdef __VOS__
b0e47665 2634 PerlIO_printf(PerlIO_stdout(),
94efb9fb 2635 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 2636#endif
092bebab 2637#ifdef __OPEN_VM
b0e47665
GS		 2638 PerlIO_printf(PerlIO_stdout(),
2639 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2640#endif
a1a0e61e 2641#ifdef POSIX_BC
b0e47665
GS		 2642 PerlIO_printf(PerlIO_stdout(),
2643 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2644#endif
61ae2fbf 2645#ifdef __MINT__
b0e47665
GS		 2646 PerlIO_printf(PerlIO_stdout(),
2647 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2648#endif
f83d2536 2649#ifdef EPOC
b0e47665 2650 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2651 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 2652#endif
e1caacb4 2653#ifdef UNDER_CE
b475b3e6
JH		 2654 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
2655 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
e1caacb4
JH		 2656 wce_hitreturn();
2657#endif
baed7233
DL		 2658#ifdef BINARY_BUILD_NOTICE
2659 BINARY_BUILD_NOTICE;
2660#endif
b0e47665
GS		 2661 PerlIO_printf(PerlIO_stdout(),
2662 "\n\
79072805 2663Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2664GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS		 2665Complete documentation for Perl, including FAQ lists, should be found on\n\
2666this system using `man perl' or `perldoc perl'. If you have access to the\n\
2667Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
7ca617d0 2668 my_exit(0);
79072805 2669 case 'w':
599cee73 2670 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2671 PL_dowarn |= G_WARN_ON;
599cee73
PM		 2672 s++;
2673 return s;
2674 case 'W':
ac27b0f5 2675 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS		 2676 if (!specialWARN(PL_compiling.cop_warnings))
2677 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2678 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM		 2679 s++;
2680 return s;
2681 case 'X':
ac27b0f5 2682 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS		 2683 if (!specialWARN(PL_compiling.cop_warnings))
2684 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2685 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW		 2686 s++;
2687 return s;
a0d0e21e 2688 case '*':
79072805
LW		 2689 case ' ':
2690 if (s[1] == '-') /* Additional switches on #! line. */
2691 return s+2;
2692 break;
a0d0e21e 2693 case '-':
79072805 2694 case 0:
51882d45 2695#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS		 2696 case '\r':
2697#endif
79072805
LW		 2698 case '\n':
2699 case '\t':
2700 break;
aa689395 2701#ifdef ALTERNATE_SHEBANG
2702 case 'S': /* OS/2 needs -S on "extproc" line. */
2703 break;
2704#endif
a0d0e21e 2705 case 'P':
3280af22 2706 if (PL_preprocess)
a0d0e21e
LW		 2707 return s+1;
2708 /* FALL THROUGH */
79072805 2709 default:
cea2e8a9 2710 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW		 2711 }
2712 return Nullch;
2713}
2714
2715/* compliments of Tom Christiansen */
2716
2717/* unexec() can be found in the Gnu emacs distribution */
ee580363 2718/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW		 2719
2720void
864dbfa3 2721Perl_my_unexec(pTHX)
79072805
LW		 2722{
2723#ifdef UNEXEC
46fc3d4c 2724 SV* prog;
2725 SV* file;
ee580363 2726 int status = 1;
79072805
LW		 2727 extern int etext;
2728
ee580363 2729 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2730 sv_catpv(prog, "/perl");
6b88bc9c 2731 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2732 sv_catpv(file, ".perldump");
79072805 2733
ee580363
GS		 2734 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2735 /* unexec prints msg to stderr in case of failure */
6ad3d225 2736 PerlProc_exit(status);
79072805 2737#else
a5f75d66
AD		 2738# ifdef VMS
2739# include <lib$routines.h>
2740 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2741# else
79072805 2742 ABORT(); /* for use with undump */
aa689395 2743# endif
a5f75d66 2744#endif
79072805
LW		 2745}
2746
cb68f92d
GS		 2747/* initialize curinterp */
2748STATIC void
cea2e8a9 2749S_init_interp(pTHX)
cb68f92d
GS		 2750{
2751
acfe0abc
GS		 2752#ifdef MULTIPLICITY
2753# define PERLVAR(var,type)
2754# define PERLVARA(var,n,type)
2755# if defined(PERL_IMPLICIT_CONTEXT)
2756# if defined(USE_5005THREADS)
2757# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2758# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS		 2759# else /* !USE_5005THREADS */
2760# define PERLVARI(var,type,init) aTHX->var = init;
2761# define PERLVARIC(var,type,init) aTHX->var = init;
2762# endif /* USE_5005THREADS */
3967c732 2763# else
acfe0abc
GS		 2764# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2765# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2766# endif
acfe0abc
GS		 2767# include "intrpvar.h"
2768# ifndef USE_5005THREADS
2769# include "thrdvar.h"
2770# endif
2771# undef PERLVAR
2772# undef PERLVARA
2773# undef PERLVARI
2774# undef PERLVARIC
2775#else
2776# define PERLVAR(var,type)
2777# define PERLVARA(var,n,type)
2778# define PERLVARI(var,type,init) PL_##var = init;
2779# define PERLVARIC(var,type,init) PL_##var = init;
2780# include "intrpvar.h"
2781# ifndef USE_5005THREADS
2782# include "thrdvar.h"
2783# endif
2784# undef PERLVAR
2785# undef PERLVARA
2786# undef PERLVARI
2787# undef PERLVARIC
cb68f92d
GS		 2788#endif
2789
cb68f92d
GS		 2790}
2791
76e3520e 2792STATIC void
cea2e8a9 2793S_init_main_stash(pTHX)
79072805 2794{
463ee0b2 2795 GV *gv;
6e72f9df 2796
3280af22 2797 PL_curstash = PL_defstash = newHV();
79cb57f6 2798 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW		 2799 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2800 SvREFCNT_dec(GvHV(gv));
3280af22 2801 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2802 SvREADONLY_on(gv);
3280af22
NIS		 2803 HvNAME(PL_defstash) = savepv("main");
2804 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2805 GvMULTI_on(PL_incgv);
2806 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2807 GvMULTI_on(PL_hintgv);
2808 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2809 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2810 GvMULTI_on(PL_errgv);
2811 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2812 GvMULTI_on(PL_replgv);
cea2e8a9 2813 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB		 2814 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2815 sv_setpvn(ERRSV, "", 0);
3280af22 2816 PL_curstash = PL_defstash;
11faa288 2817 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2818 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2819 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2820 /* We must init $/ before switches are processed. */
864dbfa3 2821 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW		 2822}
2823
76e3520e 2824STATIC void
cea2e8a9 2825S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2826{
1b24ed4b
MS		 2827 char *quote;
2828 char *code;
2829 char *cpp_discard_flag;
2830 char *perl;
2831
6c4ab083 2832 *fdscript = -1;
79072805 2833
3280af22
NIS		 2834 if (PL_e_script) {
2835 PL_origfilename = savepv("-e");
96436eeb 2836 }
6c4ab083
GS		 2837 else {
2838 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2839 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS		 2840
2841 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2842 char *s = scriptname + 8;
2843 *fdscript = atoi(s);
2844 while (isDIGIT(*s))
2845 s++;
2846 if (*s) {
2847 scriptname = savepv(s + 1);
3280af22
NIS		 2848 Safefree(PL_origfilename);
2849 PL_origfilename = scriptname;
6c4ab083
GS		 2850 }
2851 }
2852 }
2853
05ec9bb3 2854 CopFILE_free(PL_curcop);
57843af0 2855 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2856 if (strEQ(PL_origfilename,"-"))
79072805 2857 scriptname = "";
01f988be 2858 if (*fdscript >= 0) {
3280af22 2859 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS		 2860# if defined(HAS_FCNTL) && defined(F_SETFD)
2861 if (PL_rsfp)
2862 /* ensure close-on-exec */
2863 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2864# endif
96436eeb 2865 }
3280af22 2866 else if (PL_preprocess) {
46fc3d4c 2867 char *cpp_cfg = CPPSTDIN;
79cb57f6 2868 SV *cpp = newSVpvn("",0);
46fc3d4c 2869 SV *cmd = NEWSV(0,0);
2870
2871 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2872 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2873 sv_catpv(cpp, cpp_cfg);
79072805 2874
1b24ed4b
MS		 2875# ifndef VMS
2876 sv_catpvn(sv, "-I", 2);
2877 sv_catpv(sv,PRIVLIB_EXP);
2878# endif
46fc3d4c 2879
14953ddc
MB		 2880 DEBUG_P(PerlIO_printf(Perl_debug_log,
2881 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2882 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS		 2883
2884# if defined(MSDOS) || defined(WIN32) || defined(VMS)
2885 quote = "\"";
2886# else
2887 quote = "'";
2888# endif
2889
2890# ifdef VMS
2891 cpp_discard_flag = "";
2892# else
2893 cpp_discard_flag = "-C";
2894# endif
2895
2896# ifdef OS2
2897 perl = os2_execname(aTHX);
2898# else
2899 perl = PL_origargv[0];
2900# endif
2901
2902
2903 /* This strips off Perl comments which might interfere with
62375a60
NIS		 2904 the C pre-processor, including #!. #line directives are
2905 deliberately stripped to avoid confusion with Perl's version
1b24ed4b
MS		 2906 of #line. FWP played some golf with it so it will fit
2907 into VMS's 255 character buffer.
2908 */
2909 if( PL_doextract )
2910 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2911 else
2912 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2913
2914 Perl_sv_setpvf(aTHX_ cmd, "\
2915%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
62375a60 2916 perl, quote, code, quote, scriptname, cpp,
1b24ed4b
MS		 2917 cpp_discard_flag, sv, CPPMINUS);
2918
3280af22 2919 PL_doextract = FALSE;
1b24ed4b
MS		 2920# ifdef IAMSUID /* actually, this is caught earlier */
2921 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2922# ifdef HAS_SETEUID
2923 (void)seteuid(PL_uid); /* musn't stay setuid root */
2924# else
2925# ifdef HAS_SETREUID
2926 (void)setreuid((Uid_t)-1, PL_uid);
2927# else
2928# ifdef HAS_SETRESUID
2929 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2930# else
2931 PerlProc_setuid(PL_uid);
2932# endif
2933# endif
2934# endif
b28d0864 2935 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2936 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805 2937 }
1b24ed4b 2938# endif /* IAMSUID */
0a6c758d 2939
62375a60
NIS		 2940 DEBUG_P(PerlIO_printf(Perl_debug_log,
2941 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS		 2942 SvPVX(cmd)));
2943
3280af22 2944 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c 2945 SvREFCNT_dec(cmd);
2946 SvREFCNT_dec(cpp);
79072805
LW		 2947 }
2948 else if (!*scriptname) {
bbce6d69 2949 forbid_setid("program input from stdin");
3280af22 2950 PL_rsfp = PerlIO_stdin();
79072805 2951 }
96436eeb 2952 else {
3280af22 2953 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS		 2954# if defined(HAS_FCNTL) && defined(F_SETFD)
2955 if (PL_rsfp)
2956 /* ensure close-on-exec */
2957 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2958# endif
96436eeb 2959 }
3280af22 2960 if (!PL_rsfp) {
1b24ed4b
MS		 2961# ifdef DOSUID
2962# ifndef IAMSUID /* in case script is not readable before setuid */
2963 if (PL_euid &&
2964 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
2965 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2966 {
2967 /* try again */
b35112e7 2968 PERL_FPU_PRE_EXEC
62375a60
NIS		 2969 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT,
2970 BIN_EXP, (int)PERL_REVISION,
1b24ed4b
MS		 2971 (int)PERL_VERSION,
2972 (int)PERL_SUBVERSION), PL_origargv);
b35112e7 2973 PERL_FPU_POST_EXEC
1b24ed4b
MS		 2974 Perl_croak(aTHX_ "Can't do setuid\n");
2975 }
2976# endif
2977# endif
2978# ifdef IAMSUID
2979 errno = EPERM;
2980 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2981 Strerror(errno));
2982# else
2983 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
2984 CopFILE(PL_curcop), Strerror(errno));
2985# endif
13281fa4 2986 }
79072805 2987}
8d063cd8 2988
7b89560d
JH		 2989/* Mention
2990 * I_SYSSTATVFS HAS_FSTATVFS
2991 * I_SYSMOUNT
c890dc6c 2992 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH		 2993 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2994 * here so that metaconfig picks them up. */
2995
104d25b7 2996#ifdef IAMSUID
864dbfa3 2997STATIC int
e688b231 2998S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2999{
0545a864
JH		 3000 int check_okay = 0; /* able to do all the required sys/libcalls */
3001 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 3002/*
ad27e871 3003 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 3004 * fstatvfs() is UNIX98.
0545a864 3005 * fstatfs() is 4.3 BSD.
ad27e871 3006 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH		 3007 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3008 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH		 3009 */
3010
6439433f
JH		 3011#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3012
3013# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3014 defined(HAS_FSTATVFS)
3015# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 3016 struct statvfs stfs;
6439433f 3017
104d25b7
JH		 3018 check_okay = fstatvfs(fd, &stfs) == 0;
3019 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 3020# endif /* fstatvfs */
ac27b0f5 3021
6439433f
JH		 3022# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3023 defined(PERL_MOUNT_NOSUID) && \
3024 defined(HAS_FSTATFS) && \
3025 defined(HAS_STRUCT_STATFS) && \
3026 defined(HAS_STRUCT_STATFS_F_FLAGS)
3027# define FD_ON_NOSUID_CHECK_OKAY
e688b231 3028 struct statfs stfs;
6439433f 3029
104d25b7 3030 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 3031 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH		 3032# endif /* fstatfs */
3033
3034# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3035 defined(PERL_MOUNT_NOSUID) && \
3036 defined(HAS_FSTAT) && \
3037 defined(HAS_USTAT) && \
3038 defined(HAS_GETMNT) && \
3039 defined(HAS_STRUCT_FS_DATA) && \
3040 defined(NOSTAT_ONE)
3041# define FD_ON_NOSUID_CHECK_OKAY
c623ac67 3042 Stat_t fdst;
6439433f 3043
0545a864 3044 if (fstat(fd, &fdst) == 0) {
6439433f
JH		 3045 struct ustat us;
3046 if (ustat(fdst.st_dev, &us) == 0) {
3047 struct fs_data fsd;
3048 /* NOSTAT_ONE here because we're not examining fields which
3049 * vary between that case and STAT_ONE. */
ad27e871 3050 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH		 3051 size_t cmplen = sizeof(us.f_fname);
3052 if (sizeof(fsd.fd_req.path) < cmplen)
3053 cmplen = sizeof(fsd.fd_req.path);
3054 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3055 fdst.st_dev == fsd.fd_req.dev) {
3056 check_okay = 1;
3057 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3058 }
3059 }
3060 }
3061 }
0545a864 3062 }
6439433f
JH		 3063# endif /* fstat+ustat+getmnt */
3064
3065# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3066 defined(HAS_GETMNTENT) && \
3067 defined(HAS_HASMNTOPT) && \
3068 defined(MNTOPT_NOSUID)
3069# define FD_ON_NOSUID_CHECK_OKAY
3070 FILE *mtab = fopen("/etc/mtab", "r");
3071 struct mntent *entry;
c623ac67 3072 Stat_t stb, fsb;
104d25b7
JH		 3073
3074 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH		 3075 while (entry = getmntent(mtab)) {
3076 if (stat(entry->mnt_dir, &fsb) == 0
3077 && fsb.st_dev == stb.st_dev)
3078 {
3079 /* found the filesystem */
3080 check_okay = 1;
3081 if (hasmntopt(entry, MNTOPT_NOSUID))
3082 on_nosuid = 1;
3083 break;
3084 } /* A single fs may well fail its stat(). */
3085 }
104d25b7
JH		 3086 }
3087 if (mtab)
6439433f
JH		 3088 fclose(mtab);
3089# endif /* getmntent+hasmntopt */
0545a864 3090
ac27b0f5 3091 if (!check_okay)
0545a864 3092 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH		 3093 return on_nosuid;
3094}
3095#endif /* IAMSUID */
3096
76e3520e 3097STATIC void
cea2e8a9 3098S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 3099{
155aba94 3100#ifdef IAMSUID
96436eeb 3101 int which;
155aba94 3102#endif
96436eeb 3103
13281fa4
LW		 3104 /* do we need to emulate setuid on scripts? */
3105
3106 /* This code is for those BSD systems that have setuid #! scripts disabled
3107 * in the kernel because of a security problem. Merely defining DOSUID
3108 * in perl will not fix that problem, but if you have disabled setuid
3109 * scripts in the kernel, this will attempt to emulate setuid and setgid
3110 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW		 3111 * root version must be called suidperl or sperlN.NNN. If regular perl
3112 * discovers that it has opened a setuid script, it calls suidperl with
3113 * the same argv that it had. If suidperl finds that the script it has
3114 * just opened is NOT setuid root, it sets the effective uid back to the
3115 * uid. We don't just make perl setuid root because that loses the
3116 * effective uid we had before invoking perl, if it was different from the
3117 * uid.
13281fa4
LW		 3118 *
3119 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3120 * be defined in suidperl only. suidperl must be setuid root. The
3121 * Configure script will set this up for you if you want it.
3122 */
a687059c 3123
13281fa4 3124#ifdef DOSUID
6e72f9df 3125 char *s, *s2;
a0d0e21e 3126
b28d0864 3127 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 3128 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 3129 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 3130 I32 len;
2d8e6c8d 3131 STRLEN n_a;
13281fa4 3132
a687059c 3133#ifdef IAMSUID
fe14fcc3 3134#ifndef HAS_SETREUID
a687059c
LW		 3135 /* On this access check to make sure the directories are readable,
3136 * there is actually a small window that the user could use to make
3137 * filename point to an accessible directory. So there is a faint
3138 * chance that someone could execute a setuid script down in a
3139 * non-accessible directory. I don't know what to do about that.
3140 * But I don't think it's too important. The manual lies when
3141 * it says access() is useful in setuid programs.
3142 */
cc49e20b 3143 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 3144 Perl_croak(aTHX_ "Permission denied");
a687059c
LW		 3145#else
3146 /* If we can swap euid and uid, then we can determine access rights
3147 * with a simple stat of the file, and then compare device and
3148 * inode to make sure we did stat() on the same file we opened.
3149 * Then we just have to make sure he or she can execute it.
3150 */
3151 {
c623ac67 3152 Stat_t tmpstatbuf;
a687059c 3153
85e6fe83
LW		 3154 if (
3155#ifdef HAS_SETREUID
b28d0864 3156 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW		 3157#else
3158# if HAS_SETRESUID
b28d0864 3159 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 3160# endif
85e6fe83 3161#endif
b28d0864 3162 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 3163 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 3164 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 3165 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 3166#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 3167 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 3168 Perl_croak(aTHX_ "Permission denied");
104d25b7 3169#endif
b28d0864
NIS		 3170 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3171 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3172 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3173 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3174 }
85e6fe83
LW		 3175 if (
3176#ifdef HAS_SETREUID
b28d0864 3177 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW		 3178#else
3179# if defined(HAS_SETRESUID)
b28d0864 3180 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3181# endif
85e6fe83 3182#endif
b28d0864 3183 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3184 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3185 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3186 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3187 }
fe14fcc3 3188#endif /* HAS_SETREUID */
a687059c
LW		 3189#endif /* IAMSUID */
3190
b28d0864 3191 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3192 Perl_croak(aTHX_ "Permission denied");
b28d0864 3193 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3194 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3195 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3196 CopLINE_inc(PL_curcop);
6b88bc9c 3197 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3198 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3199 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3200 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3201 if (*s == ' ') s++;
45d8adaa 3202 while (!isSPACE(*s)) s++;
2d8e6c8d 3203 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df 3204 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3205 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3206 Perl_croak(aTHX_ "Not a perl script");
a687059c 3207 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW		 3208 /*
3209 * #! arg must be what we saw above. They can invoke it by
3210 * mentioning suidperl explicitly, but they may not add any strange
3211 * arguments beyond what #! says if they do invoke suidperl that way.
3212 */
3213 len = strlen(validarg);
3214 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3215 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3216 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW		 3217
3218#ifndef IAMSUID
b28d0864
NIS		 3219 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3220 PL_euid == PL_statbuf.st_uid)
3221 if (!PL_do_undump)
cea2e8a9 3222 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3223FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3224#endif /* IAMSUID */
13281fa4 3225
b28d0864
NIS		 3226 if (PL_euid) { /* oops, we're not the setuid root perl */
3227 (void)PerlIO_close(PL_rsfp);
13281fa4 3228#ifndef IAMSUID
46fc3d4c 3229 /* try again */
b35112e7 3230 PERL_FPU_PRE_EXEC
a7cb1f99 3231 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3232 (int)PERL_REVISION, (int)PERL_VERSION,
3233 (int)PERL_SUBVERSION), PL_origargv);
b35112e7 3234 PERL_FPU_POST_EXEC
13281fa4 3235#endif
cea2e8a9 3236 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW		 3237 }
3238
b28d0864 3239 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3240#ifdef HAS_SETEGID
b28d0864 3241 (void)setegid(PL_statbuf.st_gid);
a687059c 3242#else
fe14fcc3 3243#ifdef HAS_SETREGID
b28d0864 3244 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW		 3245#else
3246#ifdef HAS_SETRESGID
b28d0864 3247 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3248#else
b28d0864 3249 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW		 3250#endif
3251#endif
85e6fe83 3252#endif
b28d0864 3253 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3254 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3255 }
b28d0864
NIS		 3256 if (PL_statbuf.st_mode & S_ISUID) {
3257 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3258#ifdef HAS_SETEUID
b28d0864 3259 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3260#else
fe14fcc3 3261#ifdef HAS_SETREUID
b28d0864 3262 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW		 3263#else
3264#ifdef HAS_SETRESUID
b28d0864 3265 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3266#else
b28d0864 3267 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW		 3268#endif
3269#endif
85e6fe83 3270#endif
b28d0864 3271 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3272 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3273 }
b28d0864 3274 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3275#ifdef HAS_SETEUID
b28d0864 3276 (void)seteuid((Uid_t)PL_uid);
a687059c 3277#else
fe14fcc3 3278#ifdef HAS_SETREUID
b28d0864 3279 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3280#else
85e6fe83 3281#ifdef HAS_SETRESUID
b28d0864 3282 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3283#else
b28d0864 3284 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3285#endif
a687059c
LW		 3286#endif
3287#endif
b28d0864 3288 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3289 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3290 }
748a9306 3291 init_ids();
b28d0864 3292 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3293 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW		 3294 }
3295#ifdef IAMSUID
6b88bc9c 3296 else if (PL_preprocess)
cea2e8a9 3297 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3298 else if (fdscript >= 0)
cea2e8a9 3299 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3300 else
cea2e8a9 3301 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb 3302
3303 /* We absolutely must clear out any saved ids here, so we */
3304 /* exec the real perl, substituting fd script for scriptname. */
3305 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS		 3306 PerlIO_rewind(PL_rsfp);
3307 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS		 3308 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3309 if (!PL_origargv[which])
cea2e8a9
GS		 3310 Perl_croak(aTHX_ "Permission denied");
3311 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3312 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3313#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3314 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3315#endif
b35112e7 3316 PERL_FPU_PRE_EXEC
a7cb1f99 3317 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS		 3318 (int)PERL_REVISION, (int)PERL_VERSION,
3319 (int)PERL_SUBVERSION), PL_origargv);/* try again */
b35112e7 3320 PERL_FPU_POST_EXEC
cea2e8a9 3321 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3322#endif /* IAMSUID */
a687059c 3323#else /* !DOSUID */
3280af22 3324 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3325#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS		 3326 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3327 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3328 ||
b28d0864 3329 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3330 )
b28d0864 3331 if (!PL_do_undump)
cea2e8a9 3332 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW		 3333FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3334#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3335 /* not set-id, must be wrapped */
a687059c 3336 }
13281fa4 3337#endif /* DOSUID */
79072805 3338}
13281fa4 3339
76e3520e 3340STATIC void
cea2e8a9 3341S_find_beginning(pTHX)
79072805 3342{
6e72f9df 3343 register char *s, *s2;
e55ac0fa
HS		 3344#ifdef MACOS_TRADITIONAL
3345 int maclines = 0;
3346#endif
33b78306
LW		 3347
3348 /* skip forward in input to the real script? */
3349
bbce6d69 3350 forbid_setid("-x");
bf4acbe4 3351#ifdef MACOS_TRADITIONAL
084592ab 3352 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3353
bf4acbe4
GS		 3354 while (PL_doextract || gMacPerl_AlwaysExtract) {
3355 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3356 if (!gMacPerl_AlwaysExtract)
3357 Perl_croak(aTHX_ "No Perl script found in input\n");
e55ac0fa 3358
bf4acbe4
GS		 3359 if (PL_doextract) /* require explicit override ? */
3360 if (!OverrideExtract(PL_origfilename))
3361 Perl_croak(aTHX_ "User aborted script\n");
3362 else
3363 PL_doextract = FALSE;
e55ac0fa 3364
bf4acbe4
GS		 3365 /* Pater peccavi, file does not have #! */
3366 PerlIO_rewind(PL_rsfp);
e55ac0fa 3367
bf4acbe4
GS		 3368 break;
3369 }
3370#else
3280af22
NIS		 3371 while (PL_doextract) {
3372 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3373 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3374#endif
4f0c37ba
IZ		 3375 s2 = s;
3376 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS		 3377 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3378 PL_doextract = FALSE;
6e72f9df 3379 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3380 s2 = s;
3381 while (*s == ' ' || *s == '\t') s++;
3382 if (*s++ == '-') {
3383 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3384 if (strnEQ(s2-4,"perl",4))
3385 /*SUPPRESS 530*/
155aba94
GS		 3386 while ((s = moreswitches(s)))
3387 ;
33b78306 3388 }
95e8664e 3389#ifdef MACOS_TRADITIONAL
e55ac0fa
HS		 3390 /* We are always searching for the #!perl line in MacPerl,
3391 * so if we find it, still keep the line count correct
3392 * by counting lines we already skipped over
3393 */
3394 for (; maclines > 0 ; maclines--)
3395 PerlIO_ungetc(PL_rsfp, '\n');
3396
95e8664e 3397 break;
e55ac0fa
HS		 3398
3399 /* gMacPerl_AlwaysExtract is false in MPW tool */
3400 } else if (gMacPerl_AlwaysExtract) {
3401 ++maclines;
95e8664e 3402#endif
83025b21
LW		 3403 }
3404 }
3405}
3406
afe37c7d 3407
76e3520e 3408STATIC void
cea2e8a9 3409S_init_ids(pTHX)
352d5a3a 3410{
d8eceb89
JH		 3411 PL_uid = PerlProc_getuid();
3412 PL_euid = PerlProc_geteuid();
3413 PL_gid = PerlProc_getgid();
3414 PL_egid = PerlProc_getegid();
748a9306 3415#ifdef VMS
b28d0864
NIS		 3416 PL_uid |= PL_gid << 16;
3417 PL_euid |= PL_egid << 16;
748a9306 3418#endif
22f7c9c9
JH		 3419 /* Should not happen: */
3420 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3280af22 3421 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3422}
79072805 3423
a0643315
JH		 3424/* This is used very early in the lifetime of the program,
3425 * before even the options are parsed, so PL_tainting has
b0891165 3426 * not been initialized properly. */
af419de7 3427bool
22f7c9c9
JH		 3428Perl_doing_taint(int argc, char *argv[], char *envp[])
3429{
c3446a78
JH		 3430#ifndef PERL_IMPLICIT_SYS
3431 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3432 * before we have an interpreter-- and the whole point of this
3433 * function is to be called at such an early stage. If you are on
3434 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3435 * "tainted because running with altered effective ids', you'll
3436 * have to add your own checks somewhere in here. The two most
3437 * known samples of 'implicitness' are Win32 and NetWare, neither
3438 * of which has much of concept of 'uids'. */
af419de7 3439 int uid = PerlProc_getuid();
22f7c9c9 3440 int euid = PerlProc_geteuid();
af419de7 3441 int gid = PerlProc_getgid();
22f7c9c9
JH		 3442 int egid = PerlProc_getegid();
3443
3444#ifdef VMS
af419de7 3445 uid |= gid << 16;
22f7c9c9
JH		 3446 euid |= egid << 16;
3447#endif
3448 if (uid && (euid != uid || egid != gid))
3449 return 1;
c3446a78 3450#endif /* !PERL_IMPLICIT_SYS */
af419de7
JH		 3451 /* This is a really primitive check; environment gets ignored only
3452 * if -T are the first chars together; otherwise one gets
3453 * "Too late" message. */
22f7c9c9
JH		 3454 if ( argc > 1 && argv[1][0] == '-'
3455 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3456 return 1;
3457 return 0;
3458}
22f7c9c9 3459
76e3520e 3460STATIC void
cea2e8a9 3461S_forbid_setid(pTHX_ char *s)
bbce6d69 3462{
3280af22 3463 if (PL_euid != PL_uid)
cea2e8a9 3464 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3465 if (PL_egid != PL_gid)
cea2e8a9 3466 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69 3467}
3468
1ee4443e
IZ		 3469void
3470Perl_init_debugger(pTHX)
748a9306 3471{
1ee4443e
IZ		 3472 HV *ostash = PL_curstash;
3473
3280af22 3474 PL_curstash = PL_debstash;
7619c85e 3475 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
3280af22 3476 AvREAL_off(PL_dbargs);
7619c85e
RG		 3477 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
3478 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3479 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3480 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
7619c85e 3481 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3482 sv_setiv(PL_DBsingle, 0);
7619c85e 3483 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3484 sv_setiv(PL_DBtrace, 0);
7619c85e 3485 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3486 sv_setiv(PL_DBsignal, 0);
06492da6
SF		 3487 PL_DBassertion = GvSV((gv_fetchpv("assertion", GV_ADDMULTI, SVt_PV)));
3488 sv_setiv(PL_DBassertion, 0);
1ee4443e 3489 PL_curstash = ostash;
352d5a3a
LW		 3490}
3491
2ce36478
SM		 3492#ifndef STRESS_REALLOC
3493#define REASONABLE(size) (size)
3494#else
3495#define REASONABLE(size) (1) /* unreasonable */
3496#endif
3497
11343788 3498void
cea2e8a9 3499Perl_init_stacks(pTHX)
79072805 3500{
e336de0d 3501 /* start with 128-item stack and 8K cxstack */
3280af22 3502 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3503 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS		 3504 PL_curstackinfo->si_type = PERLSI_MAIN;
3505 PL_curstack = PL_curstackinfo->si_stack;
3506 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3507
3280af22
NIS		 3508 PL_stack_base = AvARRAY(PL_curstack);
3509 PL_stack_sp = PL_stack_base;
3510 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3511
3280af22
NIS		 3512 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3513 PL_tmps_floor = -1;
3514 PL_tmps_ix = -1;
3515 PL_tmps_max = REASONABLE(128);
8990e307 3516
3280af22
NIS		 3517 New(54,PL_markstack,REASONABLE(32),I32);
3518 PL_markstack_ptr = PL_markstack;
3519 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3520