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[perl5.git] / perl.c
CommitLineData
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1/* perl.c
2 *
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3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, by Larry Wall and others
a687059c 5 *
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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 *
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9 */
10
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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
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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. */
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26#ifdef I_UNISTD
27#include <unistd.h>
28#endif
a0d0e21e 29
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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> */
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44#endif
45
acfe0abc 46static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
0cb96387 47
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48#ifdef IAMSUID
49#ifndef DOSUID
50#define DOSUID
51#endif
52#endif
378cc40b 53
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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)
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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; \
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67 PERL_SET_THX(my_perl); \
68 OP_REFCNT_INIT; \
7d4724a4 69 MUTEX_INIT(&PL_dollarzero_mutex); \
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70 } \
71 else { \
72 PERL_SET_THX(my_perl); \
06d86050 73 } \
06d86050 74 } STMT_END
3db8f154 75#else
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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
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85#ifdef PERL_IMPLICIT_SYS
86PerlInterpreter *
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87perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
88 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
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89 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
90 struct IPerlDir* ipD, struct IPerlSock* ipS,
91 struct IPerlProc* ipP)
92{
93 PerlInterpreter *my_perl;
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94 /* New() needs interpreter, so call malloc() instead */
95 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 96 INIT_TLS_AND_INTERP;
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97 Zero(my_perl, 1, PerlInterpreter);
98 PL_Mem = ipM;
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99 PL_MemShared = ipMS;
100 PL_MemParse = ipMP;
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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
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108 return my_perl;
109}
110#else
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111
112/*
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113=head1 Embedding Functions
114
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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;
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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
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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;
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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
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163 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
164
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165 PL_linestr = NEWSV(65,79);
166 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 167
3280af22 168 if (!SvREADONLY(&PL_sv_undef)) {
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169 /* set read-only and try to insure than we wont see REFCNT==0
170 very often */
171
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172 SvREADONLY_on(&PL_sv_undef);
173 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 174
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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
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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();
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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;
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198 STATUS_ALL_SUCCESS;
199
0672f40e 200 init_i18nl10n(1);
36477c24 201 SET_NUMERIC_STANDARD();
0b5b802d 202
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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);
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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);
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214 *s = '\0';
215 SvCUR_set(PL_patchlevel, s - (U8*)SvPVX(PL_patchlevel));
216 SvPOK_on(PL_patchlevel);
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217 SvNVX(PL_patchlevel) = (NV)PERL_REVISION +
218 ((NV)PERL_VERSION / (NV)1000) +
219 ((NV)PERL_SUBVERSION / (NV)1000000);
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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 */
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227#endif
228
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229#ifdef HAVE_INTERP_INTERN
230 sys_intern_init();
231#endif
232
3a1ee7e8 233 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 234
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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. */
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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
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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
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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
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255 HvSHAREKEYS_off(PL_strtab); /* mandatory */
256 hv_ksplit(PL_strtab, 512);
257
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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
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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
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275 PL_stashcache = newHV();
276
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277#if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
278 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0 */
279 {
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280 char *s = NULL;
281
ed085813 282 if (!PL_earlytaint)
d0d2ba8f 283 s = PerlEnv_getenv("PERL_HASH_SEED");
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284 if (s)
285 while (isSPACE(*s)) s++;
286 if (s && isDIGIT(*s))
bf1e0190 287 PL_hash_seed = (UV)Atoul(s);
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288#ifndef USE_HASH_SEED_EXPLICIT
289 else {
290 /* Compute a random seed */
291 (void)seedDrand01((Rand_seed_t)seed());
292 PL_srand_called = TRUE;
293 PL_hash_seed = (UV)(Drand01() * (NV)UV_MAX);
294#if RANDBITS < (UVSIZE * 8)
295 {
296 int skip = (UVSIZE * 8) - RANDBITS;
297 PL_hash_seed >>= skip;
298 /* The low bits might need extra help. */
299 PL_hash_seed += (UV)(Drand01() * ((1 << skip) - 1));
300 }
301#endif /* RANDBITS < (UVSIZE * 8) */
302 }
303#endif /* USE_HASH_SEED_EXPLICIT */
ed085813 304 if (!PL_earlytaint && (s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG")))
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305 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n",
306 PL_hash_seed);
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307 }
308#endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
309
8990e307 310 ENTER;
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311}
312
954c1994 313/*
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314=for apidoc nothreadhook
315
316Stub that provides thread hook for perl_destruct when there are
317no threads.
318
319=cut
320*/
321
322int
4e9e3734 323Perl_nothreadhook(pTHX)
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324{
325 return 0;
326}
327
328/*
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329=for apidoc perl_destruct
330
331Shuts down a Perl interpreter. See L<perlembed>.
332
333=cut
334*/
335
31d77e54 336int
0cb96387 337perl_destruct(pTHXx)
79072805 338{
7c474504 339 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 340 HV *hv;
4d1ff10f 341#ifdef USE_5005THREADS
cea2e8a9 342 dTHX;
4d1ff10f 343#endif /* USE_5005THREADS */
8990e307 344
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345 /* wait for all pseudo-forked children to finish */
346 PERL_WAIT_FOR_CHILDREN;
347
3280af22 348 destruct_level = PL_perl_destruct_level;
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349#ifdef DEBUGGING
350 {
351 char *s;
155aba94 352 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc
PP
353 int i = atoi(s);
354 if (destruct_level < i)
355 destruct_level = i;
356 }
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357 }
358#endif
359
31d77e54
AB
360
361 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
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362 dJMPENV;
363 int x = 0;
364
365 JMPENV_PUSH(x);
366 if (PL_endav && !PL_minus_c)
367 call_list(PL_scopestack_ix, PL_endav);
368 JMPENV_POP;
26f423df 369 }
f3faeb53 370 LEAVE;
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371 FREETMPS;
372
e00b64d4 373 /* Need to flush since END blocks can produce output */
f13a2bc0 374 my_fflush_all();
e00b64d4 375
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NIS
376 if (CALL_FPTR(PL_threadhook)(aTHX)) {
377 /* Threads hook has vetoed further cleanup */
b47cad08 378 return STATUS_NATIVE_EXPORT;
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379 }
380
ff0cee69
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381 /* We must account for everything. */
382
383 /* Destroy the main CV and syntax tree */
3280af22 384 if (PL_main_root) {
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385 op_free(PL_main_root);
386 PL_main_root = Nullop;
a0d0e21e 387 }
3280af22
NIS
388 PL_curcop = &PL_compiling;
389 PL_main_start = Nullop;
390 SvREFCNT_dec(PL_main_cv);
391 PL_main_cv = Nullcv;
24d3c518 392 PL_dirty = TRUE;
ff0cee69 393
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394 /* Tell PerlIO we are about to tear things apart in case
395 we have layers which are using resources that should
396 be cleaned up now.
397 */
398
399 PerlIO_destruct(aTHX);
400
3280af22 401 if (PL_sv_objcount) {
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402 /*
403 * Try to destruct global references. We do this first so that the
404 * destructors and destructees still exist. Some sv's might remain.
405 * Non-referenced objects are on their own.
406 */
a0d0e21e 407 sv_clean_objs();
8990e307
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408 }
409
5cd24f17 410 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
411 SvREFCNT_dec(PL_warnhook);
412 PL_warnhook = Nullsv;
413 SvREFCNT_dec(PL_diehook);
414 PL_diehook = Nullsv;
5cd24f17 415
4b556e6c 416 /* call exit list functions */
3280af22 417 while (PL_exitlistlen-- > 0)
acfe0abc 418 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 419
3280af22 420 Safefree(PL_exitlist);
4b556e6c 421
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422 PL_exitlist = NULL;
423 PL_exitlistlen = 0;
424
a0d0e21e 425 if (destruct_level == 0){
8990e307 426
a0d0e21e 427 DEBUG_P(debprofdump());
ac27b0f5 428
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429#if defined(PERLIO_LAYERS)
430 /* No more IO - including error messages ! */
431 PerlIO_cleanup(aTHX);
432#endif
433
a0d0e21e 434 /* The exit() function will do everything that needs doing. */
b47cad08 435 return STATUS_NATIVE_EXPORT;
a0d0e21e 436 }
5dd60ef7 437
551a8b83 438 /* jettison our possibly duplicated environment */
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439 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
440 * so we certainly shouldn't free it here
441 */
442#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
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443 if (environ != PL_origenviron
444#ifdef USE_ITHREADS
445 /* only main thread can free environ[0] contents */
446 && PL_curinterp == aTHX
447#endif
448 )
449 {
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450 I32 i;
451
452 for (i = 0; environ[i]; i++)
4b420006 453 safesysfree(environ[i]);
0631ea03 454
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455 /* Must use safesysfree() when working with environ. */
456 safesysfree(environ);
551a8b83
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457
458 environ = PL_origenviron;
459 }
460#endif
461
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DM
462#ifdef USE_ITHREADS
463 /* the syntax tree is shared between clones
464 * so op_free(PL_main_root) only ReREFCNT_dec's
465 * REGEXPs in the parent interpreter
466 * we need to manually ReREFCNT_dec for the clones
467 */
468 {
469 I32 i = AvFILLp(PL_regex_padav) + 1;
470 SV **ary = AvARRAY(PL_regex_padav);
471
472 while (i) {
35061a7e 473 SV *resv = ary[--i];
ba89bb6e 474 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM
475
476 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 477 /* this is PL_reg_curpm, already freed
35061a7e
DM
478 * flag is set in regexec.c:S_regtry
479 */
480 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 481 }
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AB
482 else if(SvREPADTMP(resv)) {
483 SvREPADTMP_off(resv);
484 }
35061a7e 485 else {
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DM
486 ReREFCNT_dec(re);
487 }
488 }
489 }
490 SvREFCNT_dec(PL_regex_padav);
491 PL_regex_padav = Nullav;
492 PL_regex_pad = NULL;
493#endif
494
081fc587
AB
495 SvREFCNT_dec((SV*) PL_stashcache);
496 PL_stashcache = NULL;
497
5f05dabc
PP
498 /* loosen bonds of global variables */
499
3280af22
NIS
500 if(PL_rsfp) {
501 (void)PerlIO_close(PL_rsfp);
502 PL_rsfp = Nullfp;
8ebc5c01
PP
503 }
504
505 /* Filters for program text */
3280af22
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506 SvREFCNT_dec(PL_rsfp_filters);
507 PL_rsfp_filters = Nullav;
8ebc5c01
PP
508
509 /* switches */
3280af22
NIS
510 PL_preprocess = FALSE;
511 PL_minus_n = FALSE;
512 PL_minus_p = FALSE;
513 PL_minus_l = FALSE;
514 PL_minus_a = FALSE;
515 PL_minus_F = FALSE;
516 PL_doswitches = FALSE;
599cee73 517 PL_dowarn = G_WARN_OFF;
3280af22
NIS
518 PL_doextract = FALSE;
519 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
520 PL_unsafe = FALSE;
521
522 Safefree(PL_inplace);
523 PL_inplace = Nullch;
a7cb1f99 524 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
525
526 if (PL_e_script) {
527 SvREFCNT_dec(PL_e_script);
528 PL_e_script = Nullsv;
8ebc5c01
PP
529 }
530
531 /* magical thingies */
532
7889fe52
NIS
533 SvREFCNT_dec(PL_ofs_sv); /* $, */
534 PL_ofs_sv = Nullsv;
5f05dabc 535
7889fe52
NIS
536 SvREFCNT_dec(PL_ors_sv); /* $\ */
537 PL_ors_sv = Nullsv;
8ebc5c01 538
3280af22
NIS
539 SvREFCNT_dec(PL_rs); /* $/ */
540 PL_rs = Nullsv;
dc92893f 541
d33b2eba
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542 PL_multiline = 0; /* $* */
543 Safefree(PL_osname); /* $^O */
544 PL_osname = Nullch;
5f05dabc 545
3280af22
NIS
546 SvREFCNT_dec(PL_statname);
547 PL_statname = Nullsv;
548 PL_statgv = Nullgv;
5f05dabc 549
8ebc5c01
PP
550 /* defgv, aka *_ should be taken care of elsewhere */
551
8ebc5c01 552 /* clean up after study() */
3280af22
NIS
553 SvREFCNT_dec(PL_lastscream);
554 PL_lastscream = Nullsv;
555 Safefree(PL_screamfirst);
556 PL_screamfirst = 0;
557 Safefree(PL_screamnext);
558 PL_screamnext = 0;
8ebc5c01 559
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GS
560 /* float buffer */
561 Safefree(PL_efloatbuf);
562 PL_efloatbuf = Nullch;
563 PL_efloatsize = 0;
564
8ebc5c01 565 /* startup and shutdown function lists */
3280af22 566 SvREFCNT_dec(PL_beginav);
5a837c8f 567 SvREFCNT_dec(PL_beginav_save);
3280af22 568 SvREFCNT_dec(PL_endav);
7d30b5c4 569 SvREFCNT_dec(PL_checkav);
ece599bd 570 SvREFCNT_dec(PL_checkav_save);
3280af22
NIS
571 SvREFCNT_dec(PL_initav);
572 PL_beginav = Nullav;
5a837c8f 573 PL_beginav_save = Nullav;
3280af22 574 PL_endav = Nullav;
7d30b5c4 575 PL_checkav = Nullav;
ece599bd 576 PL_checkav_save = Nullav;
3280af22 577 PL_initav = Nullav;
5618dfe8 578
8ebc5c01 579 /* shortcuts just get cleared */
3280af22 580 PL_envgv = Nullgv;
3280af22
NIS
581 PL_incgv = Nullgv;
582 PL_hintgv = Nullgv;
583 PL_errgv = Nullgv;
584 PL_argvgv = Nullgv;
585 PL_argvoutgv = Nullgv;
586 PL_stdingv = Nullgv;
bf49b057 587 PL_stderrgv = Nullgv;
3280af22
NIS
588 PL_last_in_gv = Nullgv;
589 PL_replgv = Nullgv;
5c831c24 590 PL_debstash = Nullhv;
8ebc5c01
PP
591
592 /* reset so print() ends up where we expect */
593 setdefout(Nullgv);
5c831c24 594
7a1c5554
GS
595 SvREFCNT_dec(PL_argvout_stack);
596 PL_argvout_stack = Nullav;
8ebc5c01 597
5c831c24
GS
598 SvREFCNT_dec(PL_modglobal);
599 PL_modglobal = Nullhv;
600 SvREFCNT_dec(PL_preambleav);
601 PL_preambleav = Nullav;
602 SvREFCNT_dec(PL_subname);
603 PL_subname = Nullsv;
604 SvREFCNT_dec(PL_linestr);
605 PL_linestr = Nullsv;
606 SvREFCNT_dec(PL_pidstatus);
607 PL_pidstatus = Nullhv;
608 SvREFCNT_dec(PL_toptarget);
609 PL_toptarget = Nullsv;
610 SvREFCNT_dec(PL_bodytarget);
611 PL_bodytarget = Nullsv;
612 PL_formtarget = Nullsv;
613
d33b2eba 614 /* free locale stuff */
b9582b6a 615#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
616 Safefree(PL_collation_name);
617 PL_collation_name = Nullch;
b9582b6a 618#endif
d33b2eba 619
b9582b6a 620#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
621 Safefree(PL_numeric_name);
622 PL_numeric_name = Nullch;
a453c169 623 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 624#endif
d33b2eba 625
5c831c24
GS
626 /* clear utf8 character classes */
627 SvREFCNT_dec(PL_utf8_alnum);
628 SvREFCNT_dec(PL_utf8_alnumc);
629 SvREFCNT_dec(PL_utf8_ascii);
630 SvREFCNT_dec(PL_utf8_alpha);
631 SvREFCNT_dec(PL_utf8_space);
632 SvREFCNT_dec(PL_utf8_cntrl);
633 SvREFCNT_dec(PL_utf8_graph);
634 SvREFCNT_dec(PL_utf8_digit);
635 SvREFCNT_dec(PL_utf8_upper);
636 SvREFCNT_dec(PL_utf8_lower);
637 SvREFCNT_dec(PL_utf8_print);
638 SvREFCNT_dec(PL_utf8_punct);
639 SvREFCNT_dec(PL_utf8_xdigit);
640 SvREFCNT_dec(PL_utf8_mark);
641 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 642 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 643 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 644 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH
645 SvREFCNT_dec(PL_utf8_idstart);
646 SvREFCNT_dec(PL_utf8_idcont);
5c831c24
GS
647 PL_utf8_alnum = Nullsv;
648 PL_utf8_alnumc = Nullsv;
649 PL_utf8_ascii = Nullsv;
650 PL_utf8_alpha = Nullsv;
651 PL_utf8_space = Nullsv;
652 PL_utf8_cntrl = Nullsv;
653 PL_utf8_graph = Nullsv;
654 PL_utf8_digit = Nullsv;
655 PL_utf8_upper = Nullsv;
656 PL_utf8_lower = Nullsv;
657 PL_utf8_print = Nullsv;
658 PL_utf8_punct = Nullsv;
659 PL_utf8_xdigit = Nullsv;
660 PL_utf8_mark = Nullsv;
661 PL_utf8_toupper = Nullsv;
662 PL_utf8_totitle = Nullsv;
663 PL_utf8_tolower = Nullsv;
b4e400f9 664 PL_utf8_tofold = Nullsv;
82686b01
JH
665 PL_utf8_idstart = Nullsv;
666 PL_utf8_idcont = Nullsv;
5c831c24 667
971a9dd3
GS
668 if (!specialWARN(PL_compiling.cop_warnings))
669 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 670 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
671 if (!specialCopIO(PL_compiling.cop_io))
672 SvREFCNT_dec(PL_compiling.cop_io);
673 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS
674 CopFILE_free(&PL_compiling);
675 CopSTASH_free(&PL_compiling);
5c831c24 676
a0d0e21e 677 /* Prepare to destruct main symbol table. */
5f05dabc 678
3280af22
NIS
679 hv = PL_defstash;
680 PL_defstash = 0;
a0d0e21e 681 SvREFCNT_dec(hv);
5c831c24
GS
682 SvREFCNT_dec(PL_curstname);
683 PL_curstname = Nullsv;
a0d0e21e 684
5a844595
GS
685 /* clear queued errors */
686 SvREFCNT_dec(PL_errors);
687 PL_errors = Nullsv;
688
a0d0e21e 689 FREETMPS;
0453d815 690 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 691 if (PL_scopestack_ix != 0)
9014280d 692 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 693 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
694 (long)PL_scopestack_ix);
695 if (PL_savestack_ix != 0)
9014280d 696 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 697 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
698 (long)PL_savestack_ix);
699 if (PL_tmps_floor != -1)
9014280d 700 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 701 (long)PL_tmps_floor + 1);
a0d0e21e 702 if (cxstack_ix != -1)
9014280d 703 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 704 (long)cxstack_ix + 1);
a0d0e21e 705 }
8990e307
LW
706
707 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 708 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 709 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
710
711 /* the 2 is for PL_fdpid and PL_strtab */
712 while (PL_sv_count > 2 && sv_clean_all())
713 ;
714
d33b2eba
GS
715 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
716 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
717 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
718 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 719
d4777f27
GS
720 AvREAL_off(PL_fdpid); /* no surviving entries */
721 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
722 PL_fdpid = Nullav;
723
6c644e78
GS
724#ifdef HAVE_INTERP_INTERN
725 sys_intern_clear();
726#endif
727
6e72f9df
PP
728 /* Destruct the global string table. */
729 {
730 /* Yell and reset the HeVAL() slots that are still holding refcounts,
731 * so that sv_free() won't fail on them.
732 */
733 I32 riter;
734 I32 max;
735 HE *hent;
736 HE **array;
737
738 riter = 0;
3280af22
NIS
739 max = HvMAX(PL_strtab);
740 array = HvARRAY(PL_strtab);
6e72f9df
PP
741 hent = array[0];
742 for (;;) {
0453d815 743 if (hent && ckWARN_d(WARN_INTERNAL)) {
9014280d 744 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 745 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
746 HeVAL(hent) - Nullsv, HeKEY(hent));
747 HeVAL(hent) = Nullsv;
748 hent = HeNEXT(hent);
749 }
750 if (!hent) {
751 if (++riter > max)
752 break;
753 hent = array[riter];
754 }
755 }
756 }
3280af22 757 SvREFCNT_dec(PL_strtab);
6e72f9df 758
e652bb2f 759#ifdef USE_ITHREADS
a0739874
DM
760 /* free the pointer table used for cloning */
761 ptr_table_free(PL_ptr_table);
53186e96 762#endif
a0739874 763
d33b2eba
GS
764 /* free special SVs */
765
766 SvREFCNT(&PL_sv_yes) = 0;
767 sv_clear(&PL_sv_yes);
768 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 769 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
770
771 SvREFCNT(&PL_sv_no) = 0;
772 sv_clear(&PL_sv_no);
773 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 774 SvFLAGS(&PL_sv_no) = 0;
01724ea0 775
9f375a43
DM
776 {
777 int i;
778 for (i=0; i<=2; i++) {
779 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
780 sv_clear(PERL_DEBUG_PAD(i));
781 SvANY(PERL_DEBUG_PAD(i)) = NULL;
782 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
783 }
784 }
785
0453d815 786 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 787 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 788
eba0f806
DM
789#ifdef DEBUG_LEAKING_SCALARS
790 if (PL_sv_count != 0) {
791 SV* sva;
792 SV* sv;
793 register SV* svend;
794
795 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
796 svend = &sva[SvREFCNT(sva)];
797 for (sv = sva + 1; sv < svend; ++sv) {
798 if (SvTYPE(sv) != SVTYPEMASK) {
799 PerlIO_printf(Perl_debug_log, "leaked: 0x%p\n", sv);
800 }
801 }
802 }
803 }
804#endif
805
806
56a2bab7 807#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
808 /* No more IO - including error messages ! */
809 PerlIO_cleanup(aTHX);
810#endif
811
9f4bd222
NIS
812 /* sv_undef needs to stay immortal until after PerlIO_cleanup
813 as currently layers use it rather than Nullsv as a marker
814 for no arg - and will try and SvREFCNT_dec it.
815 */
816 SvREFCNT(&PL_sv_undef) = 0;
817 SvREADONLY_off(&PL_sv_undef);
818
3280af22 819 Safefree(PL_origfilename);
3280af22 820 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ
821 if (PL_reg_curpm)
822 Safefree(PL_reg_curpm);
82ba1be6 823 Safefree(PL_reg_poscache);
dd28f7bb 824 free_tied_hv_pool();
3280af22 825 Safefree(PL_op_mask);
cf36064f
GS
826 Safefree(PL_psig_ptr);
827 Safefree(PL_psig_name);
2c2666fc 828 Safefree(PL_bitcount);
ce08f86c 829 Safefree(PL_psig_pend);
6e72f9df 830 nuke_stacks();
3280af22 831 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 832
a0d0e21e 833 DEBUG_P(debprofdump());
d33b2eba 834
e5dd39fc 835#ifdef USE_REENTRANT_API
10bc17b6 836 Perl_reentrant_free(aTHX);
e5dd39fc
AB
837#endif
838
612f20c3
GS
839 sv_free_arenas();
840
fc36a67e
PP
841 /* As the absolutely last thing, free the non-arena SV for mess() */
842
3280af22 843 if (PL_mess_sv) {
9c63abab
GS
844 /* it could have accumulated taint magic */
845 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
846 MAGIC* mg;
847 MAGIC* moremagic;
848 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
849 moremagic = mg->mg_moremagic;
14befaf4
DM
850 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
851 && mg->mg_len >= 0)
9c63abab
GS
852 Safefree(mg->mg_ptr);
853 Safefree(mg);
854 }
855 }
fc36a67e 856 /* we know that type >= SVt_PV */
155aba94 857 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS
858 Safefree(SvPVX(PL_mess_sv));
859 Safefree(SvANY(PL_mess_sv));
860 Safefree(PL_mess_sv);
861 PL_mess_sv = Nullsv;
fc36a67e 862 }
31d77e54 863 return STATUS_NATIVE_EXPORT;
79072805
LW
864}
865
954c1994
GS
866/*
867=for apidoc perl_free
868
869Releases a Perl interpreter. See L<perlembed>.
870
871=cut
872*/
873
79072805 874void
0cb96387 875perl_free(pTHXx)
79072805 876{
acfe0abc 877#if defined(WIN32) || defined(NETWARE)
ce3e5b80 878# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
879# ifdef NETWARE
880 void *host = nw_internal_host;
881# else
882 void *host = w32_internal_host;
883# endif
ce3e5b80 884 PerlMem_free(aTHXx);
acfe0abc 885# ifdef NETWARE
011f1a1a 886 nw_delete_internal_host(host);
acfe0abc
GS
887# else
888 win32_delete_internal_host(host);
889# endif
1c0ca838
GS
890# else
891 PerlMem_free(aTHXx);
892# endif
acfe0abc
GS
893#else
894 PerlMem_free(aTHXx);
76e3520e 895#endif
79072805
LW
896}
897
4b556e6c 898void
864dbfa3 899Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 900{
3280af22
NIS
901 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
902 PL_exitlist[PL_exitlistlen].fn = fn;
903 PL_exitlist[PL_exitlistlen].ptr = ptr;
904 ++PL_exitlistlen;
4b556e6c
JD
905}
906
954c1994
GS
907/*
908=for apidoc perl_parse
909
910Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
911
912=cut
913*/
914
79072805 915int
0cb96387 916perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 917{
6224f72b 918 I32 oldscope;
6224f72b 919 int ret;
db36c5a1 920 dJMPENV;
4d1ff10f 921#ifdef USE_5005THREADS
cea2e8a9
GS
922 dTHX;
923#endif
8d063cd8 924
a687059c
LW
925#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
926#ifdef IAMSUID
927#undef IAMSUID
cea2e8a9 928 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW
929setuid perl scripts securely.\n");
930#endif
931#endif
932
3280af22 933 PL_origargc = argc;
e2975953 934 PL_origargv = argv;
a0d0e21e 935
54bfe034 936 {
3cb9023d
JH
937 /* Set PL_origalen be the sum of the contiguous argv[]
938 * elements plus the size of the env in case that it is
939 * contiguous with the argv[]. This is used in mg.c:mg_set()
940 * as the maximum modifiable length of $0. In the worst case
941 * the area we are able to modify is limited to the size of
942 * the original argv[0].
943 * --jhi */
944 char *s;
54bfe034 945 int i;
3cb9023d
JH
946 int mask =
947 ~(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
948
949 /* See if all the arguments are contiguous in memory.
950 * Note that 'contiguous' is a loose term because some
951 * platforms align the argv[] and the envp[]. We just check
952 * that they are within aligned PTRSIZE bytes. As long as no
953 * system has something bizarre like the argv[] interleaved
954 * with some other data, we are fine. (Did I just evoke
955 * Murphy's Law?) --jhi */
956 s = PL_origargv[0];
957 while (*s) s++;
54bfe034 958 for (i = 1; i < PL_origargc; i++) {
3cb9023d
JH
959 if (PL_origargv[i] > s &&
960 PL_origargv[i] <=
961 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)) {
962 s = PL_origargv[i];
963 while (*s) s++;
54bfe034
JH
964 }
965 else
966 break;
967 }
3cb9023d
JH
968 /* Can we grab env area too to be used as the area for $0? */
969 if (PL_origenviron &&
970 PL_origenviron[0] > s &&
971 PL_origenviron[0] <=
972 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)) {
973 s = PL_origenviron[0];
974 while (*s) s++;
54bfe034 975 my_setenv("NoNe SuCh", Nullch);
3cb9023d
JH
976 /* Force copy of environment. */
977 for (i = 1; PL_origenviron[i]; i++)
978 if (PL_origenviron[i] > s &&
979 PL_origenviron[i] <=
980 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)) {
981 s = PL_origenviron[i];
982 while (*s) s++;
54bfe034
JH
983 }
984 else
985 break;
986 }
987 PL_origalen = s - PL_origargv[0];
988 }
989
3280af22 990 if (PL_do_undump) {
a0d0e21e
LW
991
992 /* Come here if running an undumped a.out. */
993
3280af22
NIS
994 PL_origfilename = savepv(argv[0]);
995 PL_do_undump = FALSE;
a0d0e21e 996 cxstack_ix = -1; /* start label stack again */
748a9306 997 init_ids();
a0d0e21e
LW
998 init_postdump_symbols(argc,argv,env);
999 return 0;
1000 }
1001
3280af22 1002 if (PL_main_root) {
3280af22
NIS
1003 op_free(PL_main_root);
1004 PL_main_root = Nullop;
ff0cee69 1005 }
3280af22
NIS
1006 PL_main_start = Nullop;
1007 SvREFCNT_dec(PL_main_cv);
1008 PL_main_cv = Nullcv;
79072805 1009
3280af22
NIS
1010 time(&PL_basetime);
1011 oldscope = PL_scopestack_ix;
599cee73 1012 PL_dowarn = G_WARN_OFF;
f86702cc 1013
14dd3ad8
GS
1014#ifdef PERL_FLEXIBLE_EXCEPTIONS
1015 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
1016#else
1017 JMPENV_PUSH(ret);
1018#endif
6224f72b 1019 switch (ret) {
312caa8e 1020 case 0:
14dd3ad8
GS
1021#ifndef PERL_FLEXIBLE_EXCEPTIONS
1022 parse_body(env,xsinit);
1023#endif
7d30b5c4
GS
1024 if (PL_checkav)
1025 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1026 ret = 0;
1027 break;
6224f72b
GS
1028 case 1:
1029 STATUS_ALL_FAILURE;
1030 /* FALL THROUGH */
1031 case 2:
1032 /* my_exit() was called */
3280af22 1033 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1034 LEAVE;
1035 FREETMPS;
3280af22 1036 PL_curstash = PL_defstash;
7d30b5c4
GS
1037 if (PL_checkav)
1038 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1039 ret = STATUS_NATIVE_EXPORT;
1040 break;
6224f72b 1041 case 3:
bf49b057 1042 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1043 ret = 1;
1044 break;
6224f72b 1045 }
14dd3ad8
GS
1046 JMPENV_POP;
1047 return ret;
1048}
1049
1050#ifdef PERL_FLEXIBLE_EXCEPTIONS
1051STATIC void *
1052S_vparse_body(pTHX_ va_list args)
1053{
1054 char **env = va_arg(args, char**);
1055 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1056
1057 return parse_body(env, xsinit);
312caa8e 1058}
14dd3ad8 1059#endif
312caa8e
CS
1060
1061STATIC void *
14dd3ad8 1062S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1063{
312caa8e
CS
1064 int argc = PL_origargc;
1065 char **argv = PL_origargv;
312caa8e
CS
1066 char *scriptname = NULL;
1067 int fdscript = -1;
1068 VOL bool dosearch = FALSE;
1069 char *validarg = "";
312caa8e
CS
1070 register SV *sv;
1071 register char *s;
cf756827 1072 char *cddir = Nullch;
312caa8e 1073
3280af22 1074 sv_setpvn(PL_linestr,"",0);
79cb57f6 1075 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1076 SAVEFREESV(sv);
1077 init_main_stash();
54310121 1078
6224f72b
GS
1079 for (argc--,argv++; argc > 0; argc--,argv++) {
1080 if (argv[0][0] != '-' || !argv[0][1])
1081 break;
1082#ifdef DOSUID
1083 if (*validarg)
1084 validarg = " PHOOEY ";
1085 else
1086 validarg = argv[0];
13281fa4 1087#endif
6224f72b
GS
1088 s = argv[0]+1;
1089 reswitch:
1090 switch (*s) {
729a02f2 1091 case 'C':
1d5472a9
GS
1092#ifndef PERL_STRICT_CR
1093 case '\r':
1094#endif
6224f72b
GS
1095 case ' ':
1096 case '0':
1097 case 'F':
1098 case 'a':
1099 case 'c':
1100 case 'd':
1101 case 'D':
1102 case 'h':
1103 case 'i':
1104 case 'l':
1105 case 'M':
1106 case 'm':
1107 case 'n':
1108 case 'p':
1109 case 's':
1110 case 'u':
1111 case 'U':
1112 case 'v':
599cee73
PM
1113 case 'W':
1114 case 'X':
6224f72b 1115 case 'w':
06492da6 1116 case 'A':
155aba94 1117 if ((s = moreswitches(s)))
6224f72b
GS
1118 goto reswitch;
1119 break;
33b78306 1120
1dbad523 1121 case 't':
22f7c9c9 1122 CHECK_MALLOC_TOO_LATE_FOR('t');
317ea90d
MS
1123 if( !PL_tainting ) {
1124 PL_taint_warn = TRUE;
1125 PL_tainting = TRUE;
1126 }
1127 s++;
1128 goto reswitch;
6224f72b 1129 case 'T':
22f7c9c9 1130 CHECK_MALLOC_TOO_LATE_FOR('T');
3280af22 1131 PL_tainting = TRUE;
317ea90d 1132 PL_taint_warn = FALSE;
6224f72b
GS
1133 s++;
1134 goto reswitch;
f86702cc 1135
6224f72b 1136 case 'e':
bf4acbe4
GS
1137#ifdef MACOS_TRADITIONAL
1138 /* ignore -e for Dev:Pseudo argument */
1139 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
e55ac0fa 1140 break;
bf4acbe4 1141#endif
3280af22 1142 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1143 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1144 if (!PL_e_script) {
79cb57f6 1145 PL_e_script = newSVpvn("",0);
0cb96387 1146 filter_add(read_e_script, NULL);
6224f72b
GS
1147 }
1148 if (*++s)
3280af22 1149 sv_catpv(PL_e_script, s);
6224f72b 1150 else if (argv[1]) {
3280af22 1151 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1152 argc--,argv++;
1153 }
1154 else
cea2e8a9 1155 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1156 sv_catpv(PL_e_script, "\n");
6224f72b 1157 break;
afe37c7d 1158
6224f72b
GS
1159 case 'I': /* -I handled both here and in moreswitches() */
1160 forbid_setid("-I");
1161 if (!*++s && (s=argv[1]) != Nullch) {
1162 argc--,argv++;
1163 }
6224f72b 1164 if (s && *s) {
0df16ed7
GS
1165 char *p;
1166 STRLEN len = strlen(s);
1167 p = savepvn(s, len);
574c798a 1168 incpush(p, TRUE, TRUE, FALSE);
0df16ed7
GS
1169 sv_catpvn(sv, "-I", 2);
1170 sv_catpvn(sv, p, len);
1171 sv_catpvn(sv, " ", 1);
6224f72b 1172 Safefree(p);
0df16ed7
GS
1173 }
1174 else
a67e862a 1175 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1176 break;
1177 case 'P':
1178 forbid_setid("-P");
3280af22 1179 PL_preprocess = TRUE;
6224f72b
GS
1180 s++;
1181 goto reswitch;
1182 case 'S':
1183 forbid_setid("-S");
1184 dosearch = TRUE;
1185 s++;
1186 goto reswitch;
1187 case 'V':
3280af22
NIS
1188 if (!PL_preambleav)
1189 PL_preambleav = newAV();
1190 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1191 if (*++s != ':') {
3280af22 1192 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1193#ifdef VMS
6b88bc9c 1194 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1195#else
3280af22 1196 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1197#endif
3280af22 1198 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1199# ifdef DEBUGGING
3280af22 1200 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1201# endif
6224f72b 1202# ifdef MULTIPLICITY
8f872242 1203 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1204# endif
4d1ff10f
AB
1205# ifdef USE_5005THREADS
1206 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1207# endif
ac5e8965
JH
1208# ifdef USE_ITHREADS
1209 sv_catpv(PL_Sv," USE_ITHREADS");
1210# endif
10cc9d2a
JH
1211# ifdef USE_64_BIT_INT
1212 sv_catpv(PL_Sv," USE_64_BIT_INT");
1213# endif
1214# ifdef USE_64_BIT_ALL
1215 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1216# endif
1217# ifdef USE_LONG_DOUBLE
1218 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1219# endif
53430762
JH
1220# ifdef USE_LARGE_FILES
1221 sv_catpv(PL_Sv," USE_LARGE_FILES");
1222# endif
ac5e8965
JH
1223# ifdef USE_SOCKS
1224 sv_catpv(PL_Sv," USE_SOCKS");
1225# endif
b363f7ed
GS
1226# ifdef PERL_IMPLICIT_CONTEXT
1227 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1228# endif
1229# ifdef PERL_IMPLICIT_SYS
1230 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1231# endif
3280af22 1232 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1233
6224f72b
GS
1234#if defined(LOCAL_PATCH_COUNT)
1235 if (LOCAL_PATCH_COUNT > 0) {
1236 int i;
3280af22 1237 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1238 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1239 if (PL_localpatches[i])
cea2e8a9 1240 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS
1241 }
1242 }
1243#endif
cea2e8a9 1244 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1245#ifdef __DATE__
1246# ifdef __TIME__
cea2e8a9 1247 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1248# else
cea2e8a9 1249 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1250# endif
1251#endif
3280af22 1252 sv_catpv(PL_Sv, "; \
6224f72b 1253$\"=\"\\n \"; \
69fcd688
JH
1254@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1255#ifdef __CYGWIN__
1256 sv_catpv(PL_Sv,"\
1257push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1258#endif
1259 sv_catpv(PL_Sv, "\
6224f72b
GS
1260print \" \\%ENV:\\n @env\\n\" if @env; \
1261print \" \\@INC:\\n @INC\\n\";");
1262 }
1263 else {
3280af22
NIS
1264 PL_Sv = newSVpv("config_vars(qw(",0);
1265 sv_catpv(PL_Sv, ++s);
1266 sv_catpv(PL_Sv, "))");
6224f72b
GS
1267 s += strlen(s);
1268 }
3280af22 1269 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1270 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1271 goto reswitch;
1272 case 'x':
3280af22 1273 PL_doextract = TRUE;
6224f72b
GS
1274 s++;
1275 if (*s)
f4c556ac 1276 cddir = s;
6224f72b
GS
1277 break;
1278 case 0:
1279 break;
1280 case '-':
1281 if (!*++s || isSPACE(*s)) {
1282 argc--,argv++;
1283 goto switch_end;
1284 }
1285 /* catch use of gnu style long options */
1286 if (strEQ(s, "version")) {
1287 s = "v";
1288 goto reswitch;
1289 }
1290 if (strEQ(s, "help")) {
1291 s = "h";
1292 goto reswitch;
1293 }
1294 s--;
1295 /* FALL THROUGH */
1296 default:
cea2e8a9 1297 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1298 }
1299 }
6224f72b 1300 switch_end:
7f9e821f 1301 sv_setsv(get_sv("/", TRUE), PL_rs);
54310121 1302
f675dbe5
CB
1303 if (
1304#ifndef SECURE_INTERNAL_GETENV
1305 !PL_tainting &&
1306#endif
cf756827 1307 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1308 {
cf756827 1309 char *popt = s;
74288ac8
GS
1310 while (isSPACE(*s))
1311 s++;
317ea90d 1312 if (*s == '-' && *(s+1) == 'T') {
22f7c9c9 1313 CHECK_MALLOC_TOO_LATE_FOR('T');
74288ac8 1314 PL_tainting = TRUE;
317ea90d
MS
1315 PL_taint_warn = FALSE;
1316 }
74288ac8 1317 else {
cf756827 1318 char *popt_copy = Nullch;
74288ac8 1319 while (s && *s) {
4ea8f8fb 1320 char *d;
74288ac8
GS
1321 while (isSPACE(*s))
1322 s++;
1323 if (*s == '-') {
1324 s++;
1325 if (isSPACE(*s))
1326 continue;
1327 }
4ea8f8fb 1328 d = s;
74288ac8
GS
1329 if (!*s)
1330 break;
06492da6 1331 if (!strchr("DIMUdmtwA", *s))
cea2e8a9 1332 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1333 while (++s && *s) {
1334 if (isSPACE(*s)) {
cf756827
GS
1335 if (!popt_copy) {
1336 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1337 s = popt_copy + (s - popt);
1338 d = popt_copy + (d - popt);
1339 }
4ea8f8fb
MS
1340 *s++ = '\0';
1341 break;
1342 }
1343 }
1c4db469 1344 if (*d == 't') {
317ea90d
MS
1345 if( !PL_tainting ) {
1346 PL_taint_warn = TRUE;
1347 PL_tainting = TRUE;
1348 }
1c4db469
RGS
1349 } else {
1350 moreswitches(d);
1351 }
6224f72b 1352 }
6224f72b
GS
1353 }
1354 }
a0d0e21e 1355
317ea90d
MS
1356 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1357 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1358 }
1359
6224f72b
GS
1360 if (!scriptname)
1361 scriptname = argv[0];
3280af22 1362 if (PL_e_script) {
6224f72b
GS
1363 argc++,argv--;
1364 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1365 }
1366 else if (scriptname == Nullch) {
1367#ifdef MSDOS
1368 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1369 moreswitches("h");
1370#endif
1371 scriptname = "-";
1372 }
1373
1374 init_perllib();
1375
1376 open_script(scriptname,dosearch,sv,&fdscript);
1377
1378 validate_suid(validarg, scriptname,fdscript);
1379
64ca3a65 1380#ifndef PERL_MICRO
0b5b802d
GS
1381#if defined(SIGCHLD) || defined(SIGCLD)
1382 {
1383#ifndef SIGCHLD
1384# define SIGCHLD SIGCLD
1385#endif
1386 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1387 if (sigstate == SIG_IGN) {
1388 if (ckWARN(WARN_SIGNAL))
9014280d 1389 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
0b5b802d
GS
1390 "Can't ignore signal CHLD, forcing to default");
1391 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1392 }
1393 }
1394#endif
64ca3a65 1395#endif
0b5b802d 1396
bf4acbe4
GS
1397#ifdef MACOS_TRADITIONAL
1398 if (PL_doextract || gMacPerl_AlwaysExtract) {
1399#else
f4c556ac 1400 if (PL_doextract) {
bf4acbe4 1401#endif
6224f72b 1402 find_beginning();
f4c556ac
GS
1403 if (cddir && PerlDir_chdir(cddir) < 0)
1404 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1405
1406 }
6224f72b 1407
3280af22
NIS
1408 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1409 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1410 CvUNIQUE_on(PL_compcv);
1411
dd2155a4 1412 CvPADLIST(PL_compcv) = pad_new(0);
4d1ff10f 1413#ifdef USE_5005THREADS
533c011a
NIS
1414 CvOWNER(PL_compcv) = 0;
1415 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1416 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1417#endif /* USE_5005THREADS */
6224f72b 1418
0c4f7ff0 1419 boot_core_PerlIO();
6224f72b 1420 boot_core_UNIVERSAL();
9a34ef1d 1421#ifndef PERL_MICRO
09bef843 1422 boot_core_xsutils();
9a34ef1d 1423#endif
6224f72b
GS
1424
1425 if (xsinit)
acfe0abc 1426 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1427#ifndef PERL_MICRO
ed79a026 1428#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1429 init_os_extras();
6224f72b 1430#endif
64ca3a65 1431#endif
6224f72b 1432
29209bc5 1433#ifdef USE_SOCKS
1b9c9cf5
DH
1434# ifdef HAS_SOCKS5_INIT
1435 socks5_init(argv[0]);
1436# else
29209bc5 1437 SOCKSinit(argv[0]);
1b9c9cf5 1438# endif
ac27b0f5 1439#endif
29209bc5 1440
6224f72b
GS
1441 init_predump_symbols();
1442 /* init_postdump_symbols not currently designed to be called */
1443 /* more than once (ENV isn't cleared first, for example) */
1444 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1445 if (!PL_do_undump)
6224f72b
GS
1446 init_postdump_symbols(argc,argv,env);
1447
a05d7ebb
JH
1448 /* PL_unicode is turned on by -C or by $ENV{PERL_UNICODE}.
1449 * PL_utf8locale is conditionally turned on by
085a54d9 1450 * locale.c:Perl_init_i18nl10n() if the environment
a05d7ebb 1451 * look like the user wants to use UTF-8. */
06e66572
JH
1452 if (PL_unicode) {
1453 /* Requires init_predump_symbols(). */
a05d7ebb 1454 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
06e66572
JH
1455 IO* io;
1456 PerlIO* fp;
1457 SV* sv;
1458
a05d7ebb 1459 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
06e66572 1460 * and the default open disciplines. */
a05d7ebb
JH
1461 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
1462 PL_stdingv && (io = GvIO(PL_stdingv)) &&
1463 (fp = IoIFP(io)))
1464 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1465 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
1466 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
1467 (fp = IoOFP(io)))
1468 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1469 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
1470 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
1471 (fp = IoOFP(io)))
1472 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1473 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
1474 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1475 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
1476 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
1477 if (in) {
1478 if (out)
1479 sv_setpvn(sv, ":utf8\0:utf8", 11);
1480 else
1481 sv_setpvn(sv, ":utf8\0", 6);
1482 }
1483 else if (out)
1484 sv_setpvn(sv, "\0:utf8", 6);
1485 SvSETMAGIC(sv);
1486 }
b310b053
JH
1487 }
1488 }
1489
4ffa73a3
JH
1490 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
1491 if (strEQ(s, "unsafe"))
1492 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
1493 else if (strEQ(s, "safe"))
1494 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
1495 else
1496 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
1497 }
1498
6224f72b
GS
1499 init_lexer();
1500
1501 /* now parse the script */
1502
93189314 1503 SETERRNO(0,SS_NORMAL);
3280af22 1504 PL_error_count = 0;
bf4acbe4
GS
1505#ifdef MACOS_TRADITIONAL
1506 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1507 if (PL_minus_c)
1508 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1509 else {
1510 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1511 MacPerl_MPWFileName(PL_origfilename));
1512 }
1513 }
1514#else
3280af22
NIS
1515 if (yyparse() || PL_error_count) {
1516 if (PL_minus_c)
cea2e8a9 1517 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1518 else {
cea2e8a9 1519 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1520 PL_origfilename);
6224f72b
GS
1521 }
1522 }
bf4acbe4 1523#endif
57843af0 1524 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1525 PL_curstash = PL_defstash;
1526 PL_preprocess = FALSE;
1527 if (PL_e_script) {
1528 SvREFCNT_dec(PL_e_script);
1529 PL_e_script = Nullsv;
6224f72b
GS
1530 }
1531
3280af22 1532 if (PL_do_undump)
6224f72b
GS
1533 my_unexec();
1534
57843af0
GS
1535 if (isWARN_ONCE) {
1536 SAVECOPFILE(PL_curcop);
1537 SAVECOPLINE(PL_curcop);
3280af22 1538 gv_check(PL_defstash);
57843af0 1539 }
6224f72b
GS
1540
1541 LEAVE;
1542 FREETMPS;
1543
1544#ifdef MYMALLOC
1545 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1546 dump_mstats("after compilation:");
1547#endif
1548
1549 ENTER;
3280af22 1550 PL_restartop = 0;
312caa8e 1551 return NULL;
6224f72b
GS
1552}
1553
954c1994
GS
1554/*
1555=for apidoc perl_run
1556
1557Tells a Perl interpreter to run. See L<perlembed>.
1558
1559=cut
1560*/
1561
6224f72b 1562int
0cb96387 1563perl_run(pTHXx)
6224f72b 1564{
6224f72b 1565 I32 oldscope;
14dd3ad8 1566 int ret = 0;
db36c5a1 1567 dJMPENV;
4d1ff10f 1568#ifdef USE_5005THREADS
cea2e8a9
GS
1569 dTHX;
1570#endif
6224f72b 1571
3280af22 1572 oldscope = PL_scopestack_ix;
96e176bf
CL
1573#ifdef VMS
1574 VMSISH_HUSHED = 0;
1575#endif
6224f72b 1576
14dd3ad8 1577#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1578 redo_body:
14dd3ad8
GS
1579 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1580#else
1581 JMPENV_PUSH(ret);
1582#endif
6224f72b
GS
1583 switch (ret) {
1584 case 1:
1585 cxstack_ix = -1; /* start context stack again */
312caa8e 1586 goto redo_body;
14dd3ad8
GS
1587 case 0: /* normal completion */
1588#ifndef PERL_FLEXIBLE_EXCEPTIONS
1589 redo_body:
1590 run_body(oldscope);
1591#endif
1592 /* FALL THROUGH */
1593 case 2: /* my_exit() */
3280af22 1594 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1595 LEAVE;
1596 FREETMPS;
3280af22 1597 PL_curstash = PL_defstash;
3a1ee7e8 1598 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
1599 PL_endav && !PL_minus_c)
1600 call_list(oldscope, PL_endav);
6224f72b
GS
1601#ifdef MYMALLOC
1602 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1603 dump_mstats("after execution: ");
1604#endif
14dd3ad8
GS
1605 ret = STATUS_NATIVE_EXPORT;
1606 break;
6224f72b 1607 case 3:
312caa8e
CS
1608 if (PL_restartop) {
1609 POPSTACK_TO(PL_mainstack);
1610 goto redo_body;
6224f72b 1611 }
bf49b057 1612 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1613 FREETMPS;
14dd3ad8
GS
1614 ret = 1;
1615 break;
6224f72b
GS
1616 }
1617
14dd3ad8
GS
1618 JMPENV_POP;
1619 return ret;
312caa8e
CS
1620}
1621
14dd3ad8 1622#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1623STATIC void *
14dd3ad8 1624S_vrun_body(pTHX_ va_list args)
312caa8e 1625{
312caa8e
CS
1626 I32 oldscope = va_arg(args, I32);
1627
14dd3ad8
GS
1628 return run_body(oldscope);
1629}
1630#endif
1631
1632
1633STATIC void *
1634S_run_body(pTHX_ I32 oldscope)
1635{
6224f72b 1636 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1637 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1638
3280af22 1639 if (!PL_restartop) {
6224f72b
GS
1640 DEBUG_x(dump_all());
1641 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1642 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1643 PTR2UV(thr)));
6224f72b 1644
3280af22 1645 if (PL_minus_c) {
bf4acbe4 1646#ifdef MACOS_TRADITIONAL
e69a2255
JH
1647 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
1648 (gMacPerl_ErrorFormat ? "# " : ""),
1649 MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1650#else
bf49b057 1651 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1652#endif
6224f72b
GS
1653 my_exit(0);
1654 }
3280af22 1655 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1656 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1657 if (PL_initav)
1658 call_list(oldscope, PL_initav);
6224f72b
GS
1659 }
1660
1661 /* do it */
1662
3280af22 1663 if (PL_restartop) {
533c011a 1664 PL_op = PL_restartop;
3280af22 1665 PL_restartop = 0;
cea2e8a9 1666 CALLRUNOPS(aTHX);
6224f72b 1667 }
3280af22
NIS
1668 else if (PL_main_start) {
1669 CvDEPTH(PL_main_cv) = 1;
533c011a 1670 PL_op = PL_main_start;
cea2e8a9 1671 CALLRUNOPS(aTHX);
6224f72b
GS
1672 }
1673
f6b3007c
JH
1674 my_exit(0);
1675 /* NOTREACHED */
312caa8e 1676 return NULL;
6224f72b
GS
1677}
1678
954c1994 1679/*
ccfc67b7
JH
1680=head1 SV Manipulation Functions
1681
954c1994
GS
1682=for apidoc p||get_sv
1683
1684Returns the SV of the specified Perl scalar. If C<create> is set and the
1685Perl variable does not exist then it will be created. If C<create> is not
1686set and the variable does not exist then NULL is returned.
1687
1688=cut
1689*/
1690
6224f72b 1691SV*
864dbfa3 1692Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1693{
1694 GV *gv;
4d1ff10f 1695#ifdef USE_5005THREADS
6224f72b
GS
1696 if (name[1] == '\0' && !isALPHA(name[0])) {
1697 PADOFFSET tmp = find_threadsv(name);
411caa50 1698 if (tmp != NOT_IN_PAD)
6224f72b 1699 return THREADSV(tmp);
6224f72b 1700 }
4d1ff10f 1701#endif /* USE_5005THREADS */
6224f72b
GS
1702 gv = gv_fetchpv(name, create, SVt_PV);
1703 if (gv)
1704 return GvSV(gv);
1705 return Nullsv;
1706}
1707
954c1994 1708/*
ccfc67b7
JH
1709=head1 Array Manipulation Functions
1710
954c1994
GS
1711=for apidoc p||get_av
1712
1713Returns the AV of the specified Perl array. If C<create> is set and the
1714Perl variable does not exist then it will be created. If C<create> is not
1715set and the variable does not exist then NULL is returned.
1716
1717=cut
1718*/
1719
6224f72b 1720AV*
864dbfa3 1721Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1722{
1723 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1724 if (create)
1725 return GvAVn(gv);
1726 if (gv)
1727 return GvAV(gv);
1728 return Nullav;
1729}
1730
954c1994 1731/*
ccfc67b7
JH
1732=head1 Hash Manipulation Functions
1733
954c1994
GS
1734=for apidoc p||get_hv
1735
1736Returns the HV of the specified Perl hash. If C<create> is set and the
1737Perl variable does not exist then it will be created. If C<create> is not
1738set and the variable does not exist then NULL is returned.
1739
1740=cut
1741*/
1742
6224f72b 1743HV*
864dbfa3 1744Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1745{
a0d0e21e
LW
1746 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1747 if (create)
1748 return GvHVn(gv);
1749 if (gv)
1750 return GvHV(gv);
1751 return Nullhv;
1752}
1753
954c1994 1754/*
ccfc67b7
JH
1755=head1 CV Manipulation Functions
1756
954c1994
GS
1757=for apidoc p||get_cv
1758
1759Returns the CV of the specified Perl subroutine. If C<create> is set and
1760the Perl subroutine does not exist then it will be declared (which has the
1761same effect as saying C<sub name;>). If C<create> is not set and the
1762subroutine does not exist then NULL is returned.
1763
1764=cut
1765*/
1766
a0d0e21e 1767CV*
864dbfa3 1768Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
1769{
1770 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1771 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
1772 /* XXX this is probably not what they think they're getting.
1773 * It has the same effect as "sub name;", i.e. just a forward
1774 * declaration! */
8ebc5c01 1775 if (create && !GvCVu(gv))
774d564b 1776 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1777 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1778 Nullop,
a0d0e21e
LW
1779 Nullop);
1780 if (gv)
8ebc5c01 1781 return GvCVu(gv);
a0d0e21e
LW
1782 return Nullcv;
1783}
1784
79072805
LW
1785/* Be sure to refetch the stack pointer after calling these routines. */
1786
954c1994 1787/*
ccfc67b7
JH
1788
1789=head1 Callback Functions
1790
954c1994
GS
1791=for apidoc p||call_argv
1792
1793Performs a callback to the specified Perl sub. See L<perlcall>.
1794
1795=cut
1796*/
1797
a0d0e21e 1798I32
864dbfa3 1799Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1800
8ac85365
NIS
1801 /* See G_* flags in cop.h */
1802 /* null terminated arg list */
8990e307 1803{
a0d0e21e 1804 dSP;
8990e307 1805
924508f0 1806 PUSHMARK(SP);
a0d0e21e 1807 if (argv) {
8990e307 1808 while (*argv) {
a0d0e21e 1809 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
1810 argv++;
1811 }
a0d0e21e 1812 PUTBACK;
8990e307 1813 }
864dbfa3 1814 return call_pv(sub_name, flags);
8990e307
LW
1815}
1816
954c1994
GS
1817/*
1818=for apidoc p||call_pv
1819
1820Performs a callback to the specified Perl sub. See L<perlcall>.
1821
1822=cut
1823*/
1824
a0d0e21e 1825I32
864dbfa3 1826Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
1827 /* name of the subroutine */
1828 /* See G_* flags in cop.h */
a0d0e21e 1829{
864dbfa3 1830 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
1831}
1832
954c1994
GS
1833/*
1834=for apidoc p||call_method
1835
1836Performs a callback to the specified Perl method. The blessed object must
1837be on the stack. See L<perlcall>.
1838
1839=cut
1840*/
1841
a0d0e21e 1842I32
864dbfa3 1843Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
1844 /* name of the subroutine */
1845 /* See G_* flags in cop.h */
a0d0e21e 1846{
968b3946 1847 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
1848}
1849
1850/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
1851/*
1852=for apidoc p||call_sv
1853
1854Performs a callback to the Perl sub whose name is in the SV. See
1855L<perlcall>.
1856
1857=cut
1858*/
1859
a0d0e21e 1860I32
864dbfa3 1861Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1862 /* See G_* flags in cop.h */
a0d0e21e 1863{
924508f0 1864 dSP;
a0d0e21e 1865 LOGOP myop; /* fake syntax tree node */
968b3946 1866 UNOP method_op;
aa689395 1867 I32 oldmark;
13689cfe 1868 volatile I32 retval = 0;
a0d0e21e 1869 I32 oldscope;
54310121 1870 bool oldcatch = CATCH_GET;
6224f72b 1871 int ret;
533c011a 1872 OP* oldop = PL_op;
db36c5a1 1873 dJMPENV;
1e422769 1874
a0d0e21e
LW
1875 if (flags & G_DISCARD) {
1876 ENTER;
1877 SAVETMPS;
1878 }
1879
aa689395 1880 Zero(&myop, 1, LOGOP);
54310121 1881 myop.op_next = Nullop;
f51d4af5 1882 if (!(flags & G_NOARGS))
aa689395 1883 myop.op_flags |= OPf_STACKED;
54310121
PP
1884 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1885 (flags & G_ARRAY) ? OPf_WANT_LIST :
1886 OPf_WANT_SCALAR);
462e5cf6 1887 SAVEOP();
533c011a 1888 PL_op = (OP*)&myop;
aa689395 1889
3280af22
NIS
1890 EXTEND(PL_stack_sp, 1);
1891 *++PL_stack_sp = sv;
aa689395 1892 oldmark = TOPMARK;
3280af22 1893 oldscope = PL_scopestack_ix;
a0d0e21e 1894
3280af22 1895 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1896 /* Handle first BEGIN of -d. */
3280af22 1897 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
1898 /* Try harder, since this may have been a sighandler, thus
1899 * curstash may be meaningless. */
3280af22 1900 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1901 && !(flags & G_NODEBUG))
533c011a 1902 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1903
968b3946
GS
1904 if (flags & G_METHOD) {
1905 Zero(&method_op, 1, UNOP);
1906 method_op.op_next = PL_op;
1907 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1908 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1909 PL_op = (OP*)&method_op;
968b3946
GS
1910 }
1911
312caa8e 1912 if (!(flags & G_EVAL)) {
0cdb2077 1913 CATCH_SET(TRUE);
14dd3ad8 1914 call_body((OP*)&myop, FALSE);
312caa8e 1915 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1916 CATCH_SET(oldcatch);
312caa8e
CS
1917 }
1918 else {
d78bda3d 1919 myop.op_other = (OP*)&myop;
3280af22 1920 PL_markstack_ptr--;
4633a7c4
LW
1921 /* we're trying to emulate pp_entertry() here */
1922 {
c09156bb 1923 register PERL_CONTEXT *cx;
54310121 1924 I32 gimme = GIMME_V;
ac27b0f5 1925
4633a7c4
LW
1926 ENTER;
1927 SAVETMPS;
ac27b0f5 1928
968b3946 1929 push_return(Nullop);
1d76a5c3 1930 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1931 PUSHEVAL(cx, 0, 0);
533c011a 1932 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1933
faef0170 1934 PL_in_eval = EVAL_INEVAL;
4633a7c4 1935 if (flags & G_KEEPERR)
faef0170 1936 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1937 else
38a03e6e 1938 sv_setpv(ERRSV,"");
4633a7c4 1939 }
3280af22 1940 PL_markstack_ptr++;
a0d0e21e 1941
14dd3ad8
GS
1942#ifdef PERL_FLEXIBLE_EXCEPTIONS
1943 redo_body:
1944 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1945 (OP*)&myop, FALSE);
14dd3ad8
GS
1946#else
1947 JMPENV_PUSH(ret);
1948#endif
6224f72b
GS
1949 switch (ret) {
1950 case 0:
14dd3ad8
GS
1951#ifndef PERL_FLEXIBLE_EXCEPTIONS
1952 redo_body:
1953 call_body((OP*)&myop, FALSE);
1954#endif
312caa8e
CS
1955 retval = PL_stack_sp - (PL_stack_base + oldmark);
1956 if (!(flags & G_KEEPERR))
1957 sv_setpv(ERRSV,"");
a0d0e21e 1958 break;
6224f72b 1959 case 1:
f86702cc 1960 STATUS_ALL_FAILURE;
a0d0e21e 1961 /* FALL THROUGH */
6224f72b 1962 case 2:
a0d0e21e 1963 /* my_exit() was called */
3280af22 1964 PL_curstash = PL_defstash;
a0d0e21e 1965 FREETMPS;
14dd3ad8 1966 JMPENV_POP;
cc3604b1 1967 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1968 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1969 my_exit_jump();
a0d0e21e 1970 /* NOTREACHED */
6224f72b 1971 case 3:
3280af22 1972 if (PL_restartop) {
533c011a 1973 PL_op = PL_restartop;
3280af22 1974 PL_restartop = 0;
312caa8e 1975 goto redo_body;
a0d0e21e 1976 }
3280af22 1977 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
1978 if (flags & G_ARRAY)
1979 retval = 0;
1980 else {
1981 retval = 1;
3280af22 1982 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 1983 }
312caa8e 1984 break;
a0d0e21e 1985 }
a0d0e21e 1986
3280af22 1987 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
1988 SV **newsp;
1989 PMOP *newpm;
1990 I32 gimme;
c09156bb 1991 register PERL_CONTEXT *cx;
a0a2876f
LW
1992 I32 optype;
1993
1994 POPBLOCK(cx,newpm);
1995 POPEVAL(cx);
1996 pop_return();
3280af22 1997 PL_curpm = newpm;
a0a2876f 1998 LEAVE;
a0d0e21e 1999 }
14dd3ad8 2000 JMPENV_POP;
a0d0e21e 2001 }
1e422769 2002
a0d0e21e 2003 if (flags & G_DISCARD) {
3280af22 2004 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2005 retval = 0;
2006 FREETMPS;
2007 LEAVE;
2008 }
533c011a 2009 PL_op = oldop;
a0d0e21e
LW
2010 return retval;
2011}
2012
14dd3ad8 2013#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2014STATIC void *
14dd3ad8 2015S_vcall_body(pTHX_ va_list args)
312caa8e
CS
2016{
2017 OP *myop = va_arg(args, OP*);
2018 int is_eval = va_arg(args, int);
2019
14dd3ad8 2020 call_body(myop, is_eval);
312caa8e
CS
2021 return NULL;
2022}
14dd3ad8 2023#endif
312caa8e
CS
2024
2025STATIC void
14dd3ad8 2026S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 2027{
312caa8e
CS
2028 if (PL_op == myop) {
2029 if (is_eval)
f807eda9 2030 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 2031 else
f807eda9 2032 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
2033 }
2034 if (PL_op)
cea2e8a9 2035 CALLRUNOPS(aTHX);
312caa8e
CS
2036}
2037
6e72f9df 2038/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 2039
954c1994
GS
2040/*
2041=for apidoc p||eval_sv
2042
2043Tells Perl to C<eval> the string in the SV.
2044
2045=cut
2046*/
2047
a0d0e21e 2048I32
864dbfa3 2049Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 2050
8ac85365 2051 /* See G_* flags in cop.h */
a0d0e21e 2052{
924508f0 2053 dSP;
a0d0e21e 2054 UNOP myop; /* fake syntax tree node */
8fa7f367 2055 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 2056 volatile I32 retval = 0;
4633a7c4 2057 I32 oldscope;
6224f72b 2058 int ret;
533c011a 2059 OP* oldop = PL_op;
db36c5a1 2060 dJMPENV;
84902520 2061
4633a7c4
LW
2062 if (flags & G_DISCARD) {
2063 ENTER;
2064 SAVETMPS;
2065 }
2066
462e5cf6 2067 SAVEOP();
533c011a
NIS
2068 PL_op = (OP*)&myop;
2069 Zero(PL_op, 1, UNOP);
3280af22
NIS
2070 EXTEND(PL_stack_sp, 1);
2071 *++PL_stack_sp = sv;
2072 oldscope = PL_scopestack_ix;
79072805 2073
4633a7c4
LW
2074 if (!(flags & G_NOARGS))
2075 myop.op_flags = OPf_STACKED;
79072805 2076 myop.op_next = Nullop;
6e72f9df 2077 myop.op_type = OP_ENTEREVAL;
54310121
PP
2078 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2079 (flags & G_ARRAY) ? OPf_WANT_LIST :
2080 OPf_WANT_SCALAR);
6e72f9df
PP
2081 if (flags & G_KEEPERR)
2082 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2083
14dd3ad8 2084#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2085 redo_body:
14dd3ad8 2086 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2087 (OP*)&myop, TRUE);
14dd3ad8
GS
2088#else
2089 JMPENV_PUSH(ret);
2090#endif
6224f72b
GS
2091 switch (ret) {
2092 case 0:
14dd3ad8
GS
2093#ifndef PERL_FLEXIBLE_EXCEPTIONS
2094 redo_body:
2095 call_body((OP*)&myop,TRUE);
2096#endif
312caa8e
CS
2097 retval = PL_stack_sp - (PL_stack_base + oldmark);
2098 if (!(flags & G_KEEPERR))
2099 sv_setpv(ERRSV,"");
4633a7c4 2100 break;
6224f72b 2101 case 1:
f86702cc 2102 STATUS_ALL_FAILURE;
4633a7c4 2103 /* FALL THROUGH */
6224f72b 2104 case 2:
4633a7c4 2105 /* my_exit() was called */
3280af22 2106 PL_curstash = PL_defstash;
4633a7c4 2107 FREETMPS;
14dd3ad8 2108 JMPENV_POP;
cc3604b1 2109 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2110 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2111 my_exit_jump();
4633a7c4 2112 /* NOTREACHED */
6224f72b 2113 case 3:
3280af22 2114 if (PL_restartop) {
533c011a 2115 PL_op = PL_restartop;
3280af22 2116 PL_restartop = 0;
312caa8e 2117 goto redo_body;
4633a7c4 2118 }
3280af22 2119 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2120 if (flags & G_ARRAY)
2121 retval = 0;
2122 else {
2123 retval = 1;
3280af22 2124 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2125 }
312caa8e 2126 break;
4633a7c4
LW
2127 }
2128
14dd3ad8 2129 JMPENV_POP;
4633a7c4 2130 if (flags & G_DISCARD) {
3280af22 2131 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2132 retval = 0;
2133 FREETMPS;
2134 LEAVE;
2135 }
533c011a 2136 PL_op = oldop;
4633a7c4
LW
2137 return retval;
2138}
2139
954c1994
GS
2140/*
2141=for apidoc p||eval_pv
2142
2143Tells Perl to C<eval> the given string and return an SV* result.
2144
2145=cut
2146*/
2147
137443ea 2148SV*
864dbfa3 2149Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2150{
2151 dSP;
2152 SV* sv = newSVpv(p, 0);
2153
864dbfa3 2154 eval_sv(sv, G_SCALAR);
137443ea
PP
2155 SvREFCNT_dec(sv);
2156
2157 SPAGAIN;
2158 sv = POPs;
2159 PUTBACK;
2160
2d8e6c8d
GS
2161 if (croak_on_error && SvTRUE(ERRSV)) {
2162 STRLEN n_a;
cea2e8a9 2163 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2164 }
137443ea
PP
2165
2166 return sv;
2167}
2168
4633a7c4
LW
2169/* Require a module. */
2170
954c1994 2171/*
ccfc67b7
JH
2172=head1 Embedding Functions
2173
954c1994
GS
2174=for apidoc p||require_pv
2175
7d3fb230
BS
2176Tells Perl to C<require> the file named by the string argument. It is
2177analogous to the Perl code C<eval "require '$file'">. It's even
2307c6d0 2178implemented that way; consider using load_module instead.
954c1994 2179
7d3fb230 2180=cut */
954c1994 2181
4633a7c4 2182void
864dbfa3 2183Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2184{
d3acc0f7
JP
2185 SV* sv;
2186 dSP;
e788e7d3 2187 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2188 PUTBACK;
2189 sv = sv_newmortal();
4633a7c4
LW
2190 sv_setpv(sv, "require '");
2191 sv_catpv(sv, pv);
2192 sv_catpv(sv, "'");
864dbfa3 2193 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2194 SPAGAIN;
2195 POPSTACK;
79072805
LW
2196}
2197
79072805 2198void
864dbfa3 2199Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW
2200{
2201 register GV *gv;
2202
155aba94 2203 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2204 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2205}
2206
76e3520e 2207STATIC void
cea2e8a9 2208S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2209{
ab821d7f 2210 /* This message really ought to be max 23 lines.
75c72d73 2211 * Removed -h because the user already knows that option. Others? */
fb73857a 2212
76e3520e 2213 static char *usage_msg[] = {
fb73857a
PP
2214"-0[octal] specify record separator (\\0, if no argument)",
2215"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2216"-C enable native wide character system interfaces",
1950ee41 2217"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2218"-d[:debugger] run program under debugger",
2219"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2220"-e 'command' one line of program (several -e's allowed, omit programfile)",
2221"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2222"-i[extension] edit <> files in place (makes backup if extension supplied)",
2223"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2224"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2225"-[mM][-]module execute `use/no module...' before executing program",
2226"-n assume 'while (<>) { ... }' loop around program",
2227"-p assume loop like -n but print line also, like sed",
2228"-P run program through C preprocessor before compilation",
2229"-s enable rudimentary parsing for switches after programfile",
2230"-S look for programfile using PATH environment variable",
2231"-T enable tainting checks",
9cbc33e8 2232"-t enable tainting warnings",
aac3bd0d 2233"-u dump core after parsing program",
fb73857a 2234"-U allow unsafe operations",
aac3bd0d
GS
2235"-v print version, subversion (includes VERY IMPORTANT perl info)",
2236"-V[:variable] print configuration summary (or a single Config.pm variable)",
2237"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS
2238"-W enable all warnings",
2239"-X disable all warnings",
fb73857a
PP
2240"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2241"\n",
2242NULL
2243};
76e3520e 2244 char **p = usage_msg;
fb73857a 2245
b0e47665
GS
2246 PerlIO_printf(PerlIO_stdout(),
2247 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2248 name);
fb73857a 2249 while (*p)
b0e47665 2250 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2251}
2252
b4ab917c
DM
2253/* convert a string of -D options (or digits) into an int.
2254 * sets *s to point to the char after the options */
2255
2256#ifdef DEBUGGING
2257int
2258Perl_get_debug_opts(pTHX_ char **s)
2259{
2260 int i = 0;
2261 if (isALPHA(**s)) {
2262 /* if adding extra options, remember to update DEBUG_MASK */
2263 static char debopts[] = "psltocPmfrxu HXDSTRJvC";
2264
2265 for (; isALNUM(**s); (*s)++) {
2266 char *d = strchr(debopts,**s);
2267 if (d)
2268 i |= 1 << (d - debopts);
2269 else if (ckWARN_d(WARN_DEBUGGING))
2270 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2271 "invalid option -D%c\n", **s);
2272 }
2273 }
2274 else {
2275 i = atoi(*s);
2276 for (; isALNUM(**s); (*s)++) ;
2277 }
2278# ifdef EBCDIC
2279 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2280 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2281 "-Dp not implemented on this platform\n");
2282# endif
2283 return i;
2284}
2285#endif
2286
79072805
LW
2287/* This routine handles any switches that can be given during run */
2288
2289char *
864dbfa3 2290Perl_moreswitches(pTHX_ char *s)
79072805 2291{
ba210ebe 2292 STRLEN numlen;
84c133a0 2293 UV rschar;
79072805
LW
2294
2295 switch (*s) {
2296 case '0':
a863c7d1 2297 {
f2095865
JH
2298 I32 flags = 0;
2299
2300 SvREFCNT_dec(PL_rs);
2301 if (s[1] == 'x' && s[2]) {
2302 char *e;
2303 U8 *tmps;
2304
2305 for (s += 2, e = s; *e; e++);
2306 numlen = e - s;
2307 flags = PERL_SCAN_SILENT_ILLDIGIT;
2308 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2309 if (s + numlen < e) {
2310 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2311 numlen = 0;
2312 s--;
2313 }
2314 PL_rs = newSVpvn("", 0);
c5661c80 2315 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
f2095865
JH
2316 tmps = (U8*)SvPVX(PL_rs);
2317 uvchr_to_utf8(tmps, rschar);
2318 SvCUR_set(PL_rs, UNISKIP(rschar));
2319 SvUTF8_on(PL_rs);
2320 }
2321 else {
2322 numlen = 4;
2323 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2324 if (rschar & ~((U8)~0))
2325 PL_rs = &PL_sv_undef;
2326 else if (!rschar && numlen >= 2)
2327 PL_rs = newSVpvn("", 0);
2328 else {
2329 char ch = (char)rschar;
2330 PL_rs = newSVpvn(&ch, 1);
2331 }
2332 }
2333 return s + numlen;
a863c7d1 2334 }
46487f74 2335 case 'C':
a05d7ebb
JH
2336 s++;
2337 PL_unicode = parse_unicode_opts(&s);
46487f74 2338 return s;
2304df62 2339 case 'F':
3280af22 2340 PL_minus_F = TRUE;
ebce5377
RGS
2341 PL_splitstr = ++s;
2342 while (*s && !isSPACE(*s)) ++s;
2343 *s = '\0';
2344 PL_splitstr = savepv(PL_splitstr);
2304df62 2345 return s;
79072805 2346 case 'a':
3280af22 2347 PL_minus_a = TRUE;
79072805
LW
2348 s++;
2349 return s;
2350 case 'c':
3280af22 2351 PL_minus_c = TRUE;
79072805
LW
2352 s++;
2353 return s;
2354 case 'd':
bbce6d69 2355 forbid_setid("-d");
4633a7c4 2356 s++;
70c94a19
RR
2357 /* The following permits -d:Mod to accepts arguments following an =
2358 in the fashion that -MSome::Mod does. */
2359 if (*s == ':' || *s == '=') {
2360 char *start;
2361 SV *sv;
2362 sv = newSVpv("use Devel::", 0);
2363 start = ++s;
2364 /* We now allow -d:Module=Foo,Bar */
2365 while(isALNUM(*s) || *s==':') ++s;
2366 if (*s != '=')
2367 sv_catpv(sv, start);
2368 else {
2369 sv_catpvn(sv, start, s-start);
2370 sv_catpv(sv, " split(/,/,q{");
2371 sv_catpv(sv, ++s);
2372 sv_catpv(sv, "})");
2373 }
4633a7c4 2374 s += strlen(s);
70c94a19 2375 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2376 }
ed094faf 2377 if (!PL_perldb) {
3280af22 2378 PL_perldb = PERLDB_ALL;
a0d0e21e 2379 init_debugger();
ed094faf 2380 }
79072805
LW
2381 return s;
2382 case 'D':
0453d815 2383 {
79072805 2384#ifdef DEBUGGING
bbce6d69 2385 forbid_setid("-D");
b4ab917c
DM
2386 s++;
2387 PL_debug = get_debug_opts(&s) | DEBUG_TOP_FLAG;
12a43e32 2388#else /* !DEBUGGING */
0453d815 2389 if (ckWARN_d(WARN_DEBUGGING))
9014280d 2390 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
0453d815 2391 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2392 for (s++; isALNUM(*s); s++) ;
79072805
LW
2393#endif
2394 /*SUPPRESS 530*/
2395 return s;
0453d815 2396 }
4633a7c4 2397 case 'h':
ac27b0f5 2398 usage(PL_origargv[0]);
7ca617d0 2399 my_exit(0);
79072805 2400 case 'i':
3280af22
NIS
2401 if (PL_inplace)
2402 Safefree(PL_inplace);
c030f24b
GH
2403#if defined(__CYGWIN__) /* do backup extension automagically */
2404 if (*(s+1) == '\0') {
2405 PL_inplace = savepv(".bak");
2406 return s+1;
2407 }
2408#endif /* __CYGWIN__ */
3280af22 2409 PL_inplace = savepv(s+1);
79072805 2410 /*SUPPRESS 530*/
3280af22 2411 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2412 if (*s) {
fb73857a 2413 *s++ = '\0';
7b8d334a
GS
2414 if (*s == '-') /* Additional switches on #! line. */
2415 s++;
2416 }
fb73857a 2417 return s;
4e49a025 2418 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2419 forbid_setid("-I");
fb73857a
PP
2420 ++s;
2421 while (*s && isSPACE(*s))
2422 ++s;
2423 if (*s) {
774d564b 2424 char *e, *p;
0df16ed7
GS
2425 p = s;
2426 /* ignore trailing spaces (possibly followed by other switches) */
2427 do {
2428 for (e = p; *e && !isSPACE(*e); e++) ;
2429 p = e;
2430 while (isSPACE(*p))
2431 p++;
2432 } while (*p && *p != '-');
2433 e = savepvn(s, e-s);
574c798a 2434 incpush(e, TRUE, TRUE, FALSE);
0df16ed7
GS
2435 Safefree(e);
2436 s = p;
2437 if (*s == '-')
2438 s++;
79072805
LW
2439 }
2440 else
a67e862a 2441 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2442 return s;
79072805 2443 case 'l':
3280af22 2444 PL_minus_l = TRUE;
79072805 2445 s++;
7889fe52
NIS
2446 if (PL_ors_sv) {
2447 SvREFCNT_dec(PL_ors_sv);
2448 PL_ors_sv = Nullsv;
2449 }
79072805 2450 if (isDIGIT(*s)) {
53305cf1 2451 I32 flags = 0;
7889fe52 2452 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2453 numlen = 3 + (*s == '0');
2454 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2455 s += numlen;
2456 }
2457 else {
8bfdd7d9 2458 if (RsPARA(PL_rs)) {
7889fe52
NIS
2459 PL_ors_sv = newSVpvn("\n\n",2);
2460 }
2461 else {
8bfdd7d9 2462 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2463 }
79072805
LW
2464 }
2465 return s;
06492da6
SF
2466 case 'A':
2467 forbid_setid("-A");
930366bd
RGS
2468 if (!PL_preambleav)
2469 PL_preambleav = newAV();
06492da6 2470 if (*++s) {
930366bd 2471 SV *sv = newSVpvn("use assertions::activate split(/,/,q{",37);
06492da6
SF
2472 sv_catpv(sv,s);
2473 sv_catpv(sv,"})");
2474 s+=strlen(s);
06492da6
SF
2475 av_push(PL_preambleav, sv);
2476 }
2477 else
930366bd 2478 av_push(PL_preambleav, newSVpvn("use assertions::activate",24));
06492da6 2479 return s;
1a30305b 2480 case 'M':
bbce6d69 2481 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2482 /* FALL THROUGH */
2483 case 'm':
bbce6d69 2484 forbid_setid("-m"); /* XXX ? */
1a30305b 2485 if (*++s) {
a5f75d66 2486 char *start;
11343788 2487 SV *sv;
a5f75d66
AD
2488 char *use = "use ";
2489 /* -M-foo == 'no foo' */
2490 if (*s == '-') { use = "no "; ++s; }
11343788 2491 sv = newSVpv(use,0);
a5f75d66 2492 start = s;
1a30305b 2493 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2494 while(isALNUM(*s) || *s==':') ++s;
2495 if (*s != '=') {
11343788 2496 sv_catpv(sv, start);
c07a80fd
PP
2497 if (*(start-1) == 'm') {
2498 if (*s != '\0')
cea2e8a9 2499 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2500 sv_catpv( sv, " ()");
c07a80fd
PP
2501 }
2502 } else {
6df41af2 2503 if (s == start)
be98fb35
GS
2504 Perl_croak(aTHX_ "Module name required with -%c option",
2505 s[-1]);
11343788
MB
2506 sv_catpvn(sv, start, s-start);
2507 sv_catpv(sv, " split(/,/,q{");
2508 sv_catpv(sv, ++s);
2509 sv_catpv(sv, "})");
c07a80fd 2510 }
1a30305b 2511 s += strlen(s);
5c831c24 2512 if (!PL_preambleav)
3280af22
NIS
2513 PL_preambleav = newAV();
2514 av_push(PL_preambleav, sv);
1a30305b
PP
2515 }
2516 else
cea2e8a9 2517 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2518 return s;
79072805 2519 case 'n':
3280af22 2520 PL_minus_n = TRUE;
79072805
LW
2521 s++;
2522 return s;
2523 case 'p':
3280af22 2524 PL_minus_p = TRUE;
79072805
LW
2525 s++;
2526 return s;
2527 case 's':
bbce6d69 2528 forbid_setid("-s");
3280af22 2529 PL_doswitches = TRUE;
79072805
LW
2530 s++;
2531 return s;
6537fe72
MS
2532 case 't':
2533 if (!PL_tainting)
22f7c9c9 2534 TOO_LATE_FOR('t');
6537fe72
MS
2535 s++;
2536 return s;
463ee0b2 2537 case 'T':
3280af22 2538 if (!PL_tainting)
22f7c9c9 2539 TOO_LATE_FOR('T');
463ee0b2
LW
2540 s++;
2541 return s;
79072805 2542 case 'u':
bf4acbe4
GS
2543#ifdef MACOS_TRADITIONAL
2544 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2545#endif
3280af22 2546 PL_do_undump = TRUE;
79072805
LW
2547 s++;
2548 return s;
2549 case 'U':
3280af22 2550 PL_unsafe = TRUE;
79072805
LW
2551 s++;
2552 return s;
2553 case 'v':
8e9464f1 2554#if !defined(DGUX)
b0e47665 2555 PerlIO_printf(PerlIO_stdout(),
d2560b70 2556 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2557 PL_patchlevel, ARCHNAME));
8e9464f1
JH
2558#else /* DGUX */
2559/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2560 PerlIO_printf(PerlIO_stdout(),
2561 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2562 PerlIO_printf(PerlIO_stdout(),
2563 Perl_form(aTHX_ " built under %s at %s %s\n",
2564 OSNAME, __DATE__, __TIME__));
2565 PerlIO_printf(PerlIO_stdout(),
2566 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2567 OSVERS));
8e9464f1
JH
2568#endif /* !DGUX */
2569
fb73857a
PP
2570#if defined(LOCAL_PATCH_COUNT)
2571 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2572 PerlIO_printf(PerlIO_stdout(),
2573 "\n(with %d registered patch%s, "
2574 "see perl -V for more detail)",
2575 (int)LOCAL_PATCH_COUNT,
2576 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2577#endif
1a30305b 2578
b0e47665 2579 PerlIO_printf(PerlIO_stdout(),
4c79ee7a 2580 "\n\nCopyright 1987-2003, Larry Wall\n");
eae9c151
JH
2581#ifdef MACOS_TRADITIONAL
2582 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2583 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 2584 "maintained by Chris Nandor\n");
eae9c151 2585#endif
79072805 2586#ifdef MSDOS
b0e47665
GS
2587 PerlIO_printf(PerlIO_stdout(),
2588 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2589#endif
2590#ifdef DJGPP
b0e47665
GS
2591 PerlIO_printf(PerlIO_stdout(),
2592 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2593 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2594#endif
79072805 2595#ifdef OS2
b0e47665
GS
2596 PerlIO_printf(PerlIO_stdout(),
2597 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 2598 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2599#endif
79072805 2600#ifdef atarist
b0e47665
GS
2601 PerlIO_printf(PerlIO_stdout(),
2602 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2603#endif
a3f9223b 2604#ifdef __BEOS__
b0e47665
GS
2605 PerlIO_printf(PerlIO_stdout(),
2606 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2607#endif
1d84e8df 2608#ifdef MPE
b0e47665 2609 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2610 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2002\n");
1d84e8df 2611#endif
9d116dd7 2612#ifdef OEMVS
b0e47665
GS
2613 PerlIO_printf(PerlIO_stdout(),
2614 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2615#endif
495c5fdc 2616#ifdef __VOS__
b0e47665 2617 PerlIO_printf(PerlIO_stdout(),
94efb9fb 2618 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 2619#endif
092bebab 2620#ifdef __OPEN_VM
b0e47665
GS
2621 PerlIO_printf(PerlIO_stdout(),
2622 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2623#endif
a1a0e61e 2624#ifdef POSIX_BC
b0e47665
GS
2625 PerlIO_printf(PerlIO_stdout(),
2626 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2627#endif
61ae2fbf 2628#ifdef __MINT__
b0e47665
GS
2629 PerlIO_printf(PerlIO_stdout(),
2630 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2631#endif
f83d2536 2632#ifdef EPOC
b0e47665 2633 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2634 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 2635#endif
e1caacb4 2636#ifdef UNDER_CE
b475b3e6
JH
2637 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
2638 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
e1caacb4
JH
2639 wce_hitreturn();
2640#endif
baed7233
DL
2641#ifdef BINARY_BUILD_NOTICE
2642 BINARY_BUILD_NOTICE;
2643#endif
b0e47665
GS
2644 PerlIO_printf(PerlIO_stdout(),
2645 "\n\
79072805 2646Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2647GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2648Complete documentation for Perl, including FAQ lists, should be found on\n\
2649this system using `man perl' or `perldoc perl'. If you have access to the\n\
2650Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
7ca617d0 2651 my_exit(0);
79072805 2652 case 'w':
599cee73 2653 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2654 PL_dowarn |= G_WARN_ON;
599cee73
PM
2655 s++;
2656 return s;
2657 case 'W':
ac27b0f5 2658 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS
2659 if (!specialWARN(PL_compiling.cop_warnings))
2660 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2661 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2662 s++;
2663 return s;
2664 case 'X':
ac27b0f5 2665 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS
2666 if (!specialWARN(PL_compiling.cop_warnings))
2667 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2668 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2669 s++;
2670 return s;
a0d0e21e 2671 case '*':
79072805
LW
2672 case ' ':
2673 if (s[1] == '-') /* Additional switches on #! line. */
2674 return s+2;
2675 break;
a0d0e21e 2676 case '-':
79072805 2677 case 0:
51882d45 2678#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2679 case '\r':
2680#endif
79072805
LW
2681 case '\n':
2682 case '\t':
2683 break;
aa689395
PP
2684#ifdef ALTERNATE_SHEBANG
2685 case 'S': /* OS/2 needs -S on "extproc" line. */
2686 break;
2687#endif
a0d0e21e 2688 case 'P':
3280af22 2689 if (PL_preprocess)
a0d0e21e
LW
2690 return s+1;
2691 /* FALL THROUGH */
79072805 2692 default:
cea2e8a9 2693 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2694 }
2695 return Nullch;
2696}
2697
2698/* compliments of Tom Christiansen */
2699
2700/* unexec() can be found in the Gnu emacs distribution */
ee580363 2701/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2702
2703void
864dbfa3 2704Perl_my_unexec(pTHX)
79072805
LW
2705{
2706#ifdef UNEXEC
46fc3d4c
PP
2707 SV* prog;
2708 SV* file;
ee580363 2709 int status = 1;
79072805
LW
2710 extern int etext;
2711
ee580363 2712 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2713 sv_catpv(prog, "/perl");
6b88bc9c 2714 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2715 sv_catpv(file, ".perldump");
79072805 2716
ee580363
GS
2717 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2718 /* unexec prints msg to stderr in case of failure */
6ad3d225 2719 PerlProc_exit(status);
79072805 2720#else
a5f75d66
AD
2721# ifdef VMS
2722# include <lib$routines.h>
2723 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2724# else
79072805 2725 ABORT(); /* for use with undump */
aa689395 2726# endif
a5f75d66 2727#endif
79072805
LW
2728}
2729
cb68f92d
GS
2730/* initialize curinterp */
2731STATIC void
cea2e8a9 2732S_init_interp(pTHX)
cb68f92d
GS
2733{
2734
acfe0abc
GS
2735#ifdef MULTIPLICITY
2736# define PERLVAR(var,type)
2737# define PERLVARA(var,n,type)
2738# if defined(PERL_IMPLICIT_CONTEXT)
2739# if defined(USE_5005THREADS)
2740# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2741# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
2742# else /* !USE_5005THREADS */
2743# define PERLVARI(var,type,init) aTHX->var = init;
2744# define PERLVARIC(var,type,init) aTHX->var = init;
2745# endif /* USE_5005THREADS */
3967c732 2746# else
acfe0abc
GS
2747# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2748# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2749# endif
acfe0abc
GS
2750# include "intrpvar.h"
2751# ifndef USE_5005THREADS
2752# include "thrdvar.h"
2753# endif
2754# undef PERLVAR
2755# undef PERLVARA
2756# undef PERLVARI
2757# undef PERLVARIC
2758#else
2759# define PERLVAR(var,type)
2760# define PERLVARA(var,n,type)
2761# define PERLVARI(var,type,init) PL_##var = init;
2762# define PERLVARIC(var,type,init) PL_##var = init;
2763# include "intrpvar.h"
2764# ifndef USE_5005THREADS
2765# include "thrdvar.h"
2766# endif
2767# undef PERLVAR
2768# undef PERLVARA
2769# undef PERLVARI
2770# undef PERLVARIC
cb68f92d
GS
2771#endif
2772
cb68f92d
GS
2773}
2774
76e3520e 2775STATIC void
cea2e8a9 2776S_init_main_stash(pTHX)
79072805 2777{
463ee0b2 2778 GV *gv;
6e72f9df 2779
3280af22 2780 PL_curstash = PL_defstash = newHV();
79cb57f6 2781 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
2782 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2783 SvREFCNT_dec(GvHV(gv));
3280af22 2784 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2785 SvREADONLY_on(gv);
3280af22
NIS
2786 HvNAME(PL_defstash) = savepv("main");
2787 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2788 GvMULTI_on(PL_incgv);
2789 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2790 GvMULTI_on(PL_hintgv);
2791 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2792 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2793 GvMULTI_on(PL_errgv);
2794 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2795 GvMULTI_on(PL_replgv);
cea2e8a9 2796 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
2797 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2798 sv_setpvn(ERRSV, "", 0);
3280af22 2799 PL_curstash = PL_defstash;
11faa288 2800 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2801 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2802 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2803 /* We must init $/ before switches are processed. */
864dbfa3 2804 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
2805}
2806
76e3520e 2807STATIC void
cea2e8a9 2808S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2809{
1b24ed4b
MS
2810 char *quote;
2811 char *code;
2812 char *cpp_discard_flag;
2813 char *perl;
2814
6c4ab083 2815 *fdscript = -1;
79072805 2816
3280af22
NIS
2817 if (PL_e_script) {
2818 PL_origfilename = savepv("-e");
96436eeb 2819 }
6c4ab083
GS
2820 else {
2821 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2822 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
2823
2824 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2825 char *s = scriptname + 8;
2826 *fdscript = atoi(s);
2827 while (isDIGIT(*s))
2828 s++;
2829 if (*s) {
2830 scriptname = savepv(s + 1);
3280af22
NIS
2831 Safefree(PL_origfilename);
2832 PL_origfilename = scriptname;
6c4ab083
GS
2833 }
2834 }
2835 }
2836
05ec9bb3 2837 CopFILE_free(PL_curcop);
57843af0 2838 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2839 if (strEQ(PL_origfilename,"-"))
79072805 2840 scriptname = "";
01f988be 2841 if (*fdscript >= 0) {
3280af22 2842 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS
2843# if defined(HAS_FCNTL) && defined(F_SETFD)
2844 if (PL_rsfp)
2845 /* ensure close-on-exec */
2846 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2847# endif
96436eeb 2848 }
3280af22 2849 else if (PL_preprocess) {
46fc3d4c 2850 char *cpp_cfg = CPPSTDIN;
79cb57f6 2851 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
2852 SV *cmd = NEWSV(0,0);
2853
2854 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2855 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2856 sv_catpv(cpp, cpp_cfg);
79072805 2857
1b24ed4b
MS
2858# ifndef VMS
2859 sv_catpvn(sv, "-I", 2);
2860 sv_catpv(sv,PRIVLIB_EXP);
2861# endif
46fc3d4c 2862
14953ddc
MB
2863 DEBUG_P(PerlIO_printf(Perl_debug_log,
2864 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2865 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS
2866
2867# if defined(MSDOS) || defined(WIN32) || defined(VMS)
2868 quote = "\"";
2869# else
2870 quote = "'";
2871# endif
2872
2873# ifdef VMS
2874 cpp_discard_flag = "";
2875# else
2876 cpp_discard_flag = "-C";
2877# endif
2878
2879# ifdef OS2
2880 perl = os2_execname(aTHX);
2881# else
2882 perl = PL_origargv[0];
2883# endif
2884
2885
2886 /* This strips off Perl comments which might interfere with
62375a60
NIS
2887 the C pre-processor, including #!. #line directives are
2888 deliberately stripped to avoid confusion with Perl's version
1b24ed4b
MS
2889 of #line. FWP played some golf with it so it will fit
2890 into VMS's 255 character buffer.
2891 */
2892 if( PL_doextract )
2893 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2894 else
2895 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2896
2897 Perl_sv_setpvf(aTHX_ cmd, "\
2898%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
62375a60 2899 perl, quote, code, quote, scriptname, cpp,
1b24ed4b
MS
2900 cpp_discard_flag, sv, CPPMINUS);
2901
3280af22 2902 PL_doextract = FALSE;
1b24ed4b
MS
2903# ifdef IAMSUID /* actually, this is caught earlier */
2904 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2905# ifdef HAS_SETEUID
2906 (void)seteuid(PL_uid); /* musn't stay setuid root */
2907# else
2908# ifdef HAS_SETREUID
2909 (void)setreuid((Uid_t)-1, PL_uid);
2910# else
2911# ifdef HAS_SETRESUID
2912 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2913# else
2914 PerlProc_setuid(PL_uid);
2915# endif
2916# endif
2917# endif
b28d0864 2918 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2919 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805 2920 }
1b24ed4b 2921# endif /* IAMSUID */
0a6c758d 2922
62375a60
NIS
2923 DEBUG_P(PerlIO_printf(Perl_debug_log,
2924 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS
2925 SvPVX(cmd)));
2926
3280af22 2927 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c
PP
2928 SvREFCNT_dec(cmd);
2929 SvREFCNT_dec(cpp);
79072805
LW
2930 }
2931 else if (!*scriptname) {
bbce6d69 2932 forbid_setid("program input from stdin");
3280af22 2933 PL_rsfp = PerlIO_stdin();
79072805 2934 }
96436eeb 2935 else {
3280af22 2936 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS
2937# if defined(HAS_FCNTL) && defined(F_SETFD)
2938 if (PL_rsfp)
2939 /* ensure close-on-exec */
2940 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2941# endif
96436eeb 2942 }
3280af22 2943 if (!PL_rsfp) {
1b24ed4b
MS
2944# ifdef DOSUID
2945# ifndef IAMSUID /* in case script is not readable before setuid */
2946 if (PL_euid &&
2947 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
2948 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2949 {
2950 /* try again */
62375a60
NIS
2951 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT,
2952 BIN_EXP, (int)PERL_REVISION,
1b24ed4b
MS
2953 (int)PERL_VERSION,
2954 (int)PERL_SUBVERSION), PL_origargv);
2955 Perl_croak(aTHX_ "Can't do setuid\n");
2956 }
2957# endif
2958# endif
2959# ifdef IAMSUID
2960 errno = EPERM;
2961 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2962 Strerror(errno));
2963# else
2964 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
2965 CopFILE(PL_curcop), Strerror(errno));
2966# endif
13281fa4 2967 }
79072805 2968}
8d063cd8 2969
7b89560d
JH
2970/* Mention
2971 * I_SYSSTATVFS HAS_FSTATVFS
2972 * I_SYSMOUNT
c890dc6c 2973 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
2974 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
2975 * here so that metaconfig picks them up. */
2976
104d25b7 2977#ifdef IAMSUID
864dbfa3 2978STATIC int
e688b231 2979S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 2980{
0545a864
JH
2981 int check_okay = 0; /* able to do all the required sys/libcalls */
2982 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 2983/*
ad27e871 2984 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 2985 * fstatvfs() is UNIX98.
0545a864 2986 * fstatfs() is 4.3 BSD.
ad27e871 2987 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
2988 * getmntent() is O(number-of-mounted-filesystems) and can hang on
2989 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
2990 */
2991
6439433f
JH
2992#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
2993
2994# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
2995 defined(HAS_FSTATVFS)
2996# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 2997 struct statvfs stfs;
6439433f 2998
104d25b7
JH
2999 check_okay = fstatvfs(fd, &stfs) == 0;
3000 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 3001# endif /* fstatvfs */
ac27b0f5 3002
6439433f
JH
3003# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3004 defined(PERL_MOUNT_NOSUID) && \
3005 defined(HAS_FSTATFS) && \
3006 defined(HAS_STRUCT_STATFS) && \
3007 defined(HAS_STRUCT_STATFS_F_FLAGS)
3008# define FD_ON_NOSUID_CHECK_OKAY
e688b231 3009 struct statfs stfs;
6439433f 3010
104d25b7 3011 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 3012 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH
3013# endif /* fstatfs */
3014
3015# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3016 defined(PERL_MOUNT_NOSUID) && \
3017 defined(HAS_FSTAT) && \
3018 defined(HAS_USTAT) && \
3019 defined(HAS_GETMNT) && \
3020 defined(HAS_STRUCT_FS_DATA) && \
3021 defined(NOSTAT_ONE)
3022# define FD_ON_NOSUID_CHECK_OKAY
c623ac67 3023 Stat_t fdst;
6439433f 3024
0545a864 3025 if (fstat(fd, &fdst) == 0) {
6439433f
JH
3026 struct ustat us;
3027 if (ustat(fdst.st_dev, &us) == 0) {
3028 struct fs_data fsd;
3029 /* NOSTAT_ONE here because we're not examining fields which
3030 * vary between that case and STAT_ONE. */
ad27e871 3031 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
3032 size_t cmplen = sizeof(us.f_fname);
3033 if (sizeof(fsd.fd_req.path) < cmplen)
3034 cmplen = sizeof(fsd.fd_req.path);
3035 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3036 fdst.st_dev == fsd.fd_req.dev) {
3037 check_okay = 1;
3038 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3039 }
3040 }
3041 }
3042 }
0545a864 3043 }
6439433f
JH
3044# endif /* fstat+ustat+getmnt */
3045
3046# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3047 defined(HAS_GETMNTENT) && \
3048 defined(HAS_HASMNTOPT) && \
3049 defined(MNTOPT_NOSUID)
3050# define FD_ON_NOSUID_CHECK_OKAY
3051 FILE *mtab = fopen("/etc/mtab", "r");
3052 struct mntent *entry;
c623ac67 3053 Stat_t stb, fsb;
104d25b7
JH
3054
3055 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
3056 while (entry = getmntent(mtab)) {
3057 if (stat(entry->mnt_dir, &fsb) == 0
3058 && fsb.st_dev == stb.st_dev)
3059 {
3060 /* found the filesystem */
3061 check_okay = 1;
3062 if (hasmntopt(entry, MNTOPT_NOSUID))
3063 on_nosuid = 1;
3064 break;
3065 } /* A single fs may well fail its stat(). */
3066 }
104d25b7
JH
3067 }
3068 if (mtab)
6439433f
JH
3069 fclose(mtab);
3070# endif /* getmntent+hasmntopt */
0545a864 3071
ac27b0f5 3072 if (!check_okay)
0545a864 3073 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH
3074 return on_nosuid;
3075}
3076#endif /* IAMSUID */
3077
76e3520e 3078STATIC void
cea2e8a9 3079S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 3080{
155aba94 3081#ifdef IAMSUID
96436eeb 3082 int which;
155aba94 3083#endif
96436eeb 3084
13281fa4
LW
3085 /* do we need to emulate setuid on scripts? */
3086
3087 /* This code is for those BSD systems that have setuid #! scripts disabled
3088 * in the kernel because of a security problem. Merely defining DOSUID
3089 * in perl will not fix that problem, but if you have disabled setuid
3090 * scripts in the kernel, this will attempt to emulate setuid and setgid
3091 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
3092 * root version must be called suidperl or sperlN.NNN. If regular perl
3093 * discovers that it has opened a setuid script, it calls suidperl with
3094 * the same argv that it had. If suidperl finds that the script it has
3095 * just opened is NOT setuid root, it sets the effective uid back to the
3096 * uid. We don't just make perl setuid root because that loses the
3097 * effective uid we had before invoking perl, if it was different from the
3098 * uid.
13281fa4
LW
3099 *
3100 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3101 * be defined in suidperl only. suidperl must be setuid root. The
3102 * Configure script will set this up for you if you want it.
3103 */
a687059c 3104
13281fa4 3105#ifdef DOSUID
6e72f9df 3106 char *s, *s2;
a0d0e21e 3107
b28d0864 3108 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 3109 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 3110 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 3111 I32 len;
2d8e6c8d 3112 STRLEN n_a;
13281fa4 3113
a687059c 3114#ifdef IAMSUID
fe14fcc3 3115#ifndef HAS_SETREUID
a687059c
LW
3116 /* On this access check to make sure the directories are readable,
3117 * there is actually a small window that the user could use to make
3118 * filename point to an accessible directory. So there is a faint
3119 * chance that someone could execute a setuid script down in a
3120 * non-accessible directory. I don't know what to do about that.
3121 * But I don't think it's too important. The manual lies when
3122 * it says access() is useful in setuid programs.
3123 */
cc49e20b 3124 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 3125 Perl_croak(aTHX_ "Permission denied");
a687059c
LW
3126#else
3127 /* If we can swap euid and uid, then we can determine access rights
3128 * with a simple stat of the file, and then compare device and
3129 * inode to make sure we did stat() on the same file we opened.
3130 * Then we just have to make sure he or she can execute it.
3131 */
3132 {
c623ac67 3133 Stat_t tmpstatbuf;
a687059c 3134
85e6fe83
LW
3135 if (
3136#ifdef HAS_SETREUID
b28d0864 3137 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW
3138#else
3139# if HAS_SETRESUID
b28d0864 3140 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 3141# endif
85e6fe83 3142#endif
b28d0864 3143 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 3144 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 3145 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 3146 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 3147#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 3148 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 3149 Perl_croak(aTHX_ "Permission denied");
104d25b7 3150#endif
b28d0864
NIS
3151 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3152 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3153 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3154 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3155 }
85e6fe83
LW
3156 if (
3157#ifdef HAS_SETREUID
b28d0864 3158 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW
3159#else
3160# if defined(HAS_SETRESUID)
b28d0864 3161 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3162# endif
85e6fe83 3163#endif
b28d0864 3164 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3165 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3166 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3167 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3168 }
fe14fcc3 3169#endif /* HAS_SETREUID */
a687059c
LW
3170#endif /* IAMSUID */
3171
b28d0864 3172 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3173 Perl_croak(aTHX_ "Permission denied");
b28d0864 3174 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3175 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3176 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3177 CopLINE_inc(PL_curcop);
6b88bc9c 3178 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3179 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3180 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3181 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3182 if (*s == ' ') s++;
45d8adaa 3183 while (!isSPACE(*s)) s++;
2d8e6c8d 3184 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df
PP
3185 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3186 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3187 Perl_croak(aTHX_ "Not a perl script");
a687059c 3188 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3189 /*
3190 * #! arg must be what we saw above. They can invoke it by
3191 * mentioning suidperl explicitly, but they may not add any strange
3192 * arguments beyond what #! says if they do invoke suidperl that way.
3193 */
3194 len = strlen(validarg);
3195 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3196 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3197 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW
3198
3199#ifndef IAMSUID
b28d0864
NIS
3200 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3201 PL_euid == PL_statbuf.st_uid)
3202 if (!PL_do_undump)
cea2e8a9 3203 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3204FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3205#endif /* IAMSUID */
13281fa4 3206
b28d0864
NIS
3207 if (PL_euid) { /* oops, we're not the setuid root perl */
3208 (void)PerlIO_close(PL_rsfp);
13281fa4 3209#ifndef IAMSUID
46fc3d4c 3210 /* try again */
a7cb1f99 3211 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3212 (int)PERL_REVISION, (int)PERL_VERSION,
3213 (int)PERL_SUBVERSION), PL_origargv);
13281fa4 3214#endif
cea2e8a9 3215 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
3216 }
3217
b28d0864 3218 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3219#ifdef HAS_SETEGID
b28d0864 3220 (void)setegid(PL_statbuf.st_gid);
a687059c 3221#else
fe14fcc3 3222#ifdef HAS_SETREGID
b28d0864 3223 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW
3224#else
3225#ifdef HAS_SETRESGID
b28d0864 3226 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3227#else
b28d0864 3228 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW
3229#endif
3230#endif
85e6fe83 3231#endif
b28d0864 3232 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3233 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3234 }
b28d0864
NIS
3235 if (PL_statbuf.st_mode & S_ISUID) {
3236 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3237#ifdef HAS_SETEUID
b28d0864 3238 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3239#else
fe14fcc3 3240#ifdef HAS_SETREUID
b28d0864 3241 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW
3242#else
3243#ifdef HAS_SETRESUID
b28d0864 3244 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3245#else
b28d0864 3246 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW
3247#endif
3248#endif
85e6fe83 3249#endif
b28d0864 3250 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3251 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3252 }
b28d0864 3253 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3254#ifdef HAS_SETEUID
b28d0864 3255 (void)seteuid((Uid_t)PL_uid);
a687059c 3256#else
fe14fcc3 3257#ifdef HAS_SETREUID
b28d0864 3258 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3259#else
85e6fe83 3260#ifdef HAS_SETRESUID
b28d0864 3261 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3262#else
b28d0864 3263 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3264#endif
a687059c
LW
3265#endif
3266#endif
b28d0864 3267 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3268 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3269 }
748a9306 3270 init_ids();
b28d0864 3271 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3272 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW
3273 }
3274#ifdef IAMSUID
6b88bc9c 3275 else if (PL_preprocess)
cea2e8a9 3276 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3277 else if (fdscript >= 0)
cea2e8a9 3278 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3279 else
cea2e8a9 3280 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb
PP
3281
3282 /* We absolutely must clear out any saved ids here, so we */
3283 /* exec the real perl, substituting fd script for scriptname. */
3284 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS
3285 PerlIO_rewind(PL_rsfp);
3286 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS
3287 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3288 if (!PL_origargv[which])
cea2e8a9
GS
3289 Perl_croak(aTHX_ "Permission denied");
3290 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3291 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3292#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3293 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3294#endif
a7cb1f99 3295 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3296 (int)PERL_REVISION, (int)PERL_VERSION,
3297 (int)PERL_SUBVERSION), PL_origargv);/* try again */
cea2e8a9 3298 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3299#endif /* IAMSUID */
a687059c 3300#else /* !DOSUID */
3280af22 3301 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3302#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS
3303 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3304 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3305 ||
b28d0864 3306 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3307 )
b28d0864 3308 if (!PL_do_undump)
cea2e8a9 3309 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3310FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3311#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3312 /* not set-id, must be wrapped */
a687059c 3313 }
13281fa4 3314#endif /* DOSUID */
79072805 3315}
13281fa4 3316
76e3520e 3317STATIC void
cea2e8a9 3318S_find_beginning(pTHX)
79072805 3319{
6e72f9df 3320 register char *s, *s2;
e55ac0fa
HS
3321#ifdef MACOS_TRADITIONAL
3322 int maclines = 0;
3323#endif
33b78306
LW
3324
3325 /* skip forward in input to the real script? */
3326
bbce6d69 3327 forbid_setid("-x");
bf4acbe4 3328#ifdef MACOS_TRADITIONAL
084592ab 3329 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3330
bf4acbe4
GS
3331 while (PL_doextract || gMacPerl_AlwaysExtract) {
3332 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3333 if (!gMacPerl_AlwaysExtract)
3334 Perl_croak(aTHX_ "No Perl script found in input\n");
e55ac0fa 3335
bf4acbe4
GS
3336 if (PL_doextract) /* require explicit override ? */
3337 if (!OverrideExtract(PL_origfilename))
3338 Perl_croak(aTHX_ "User aborted script\n");
3339 else
3340 PL_doextract = FALSE;
e55ac0fa 3341
bf4acbe4
GS
3342 /* Pater peccavi, file does not have #! */
3343 PerlIO_rewind(PL_rsfp);
e55ac0fa 3344
bf4acbe4
GS
3345 break;
3346 }
3347#else
3280af22
NIS
3348 while (PL_doextract) {
3349 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3350 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3351#endif
4f0c37ba
IZ
3352 s2 = s;
3353 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS
3354 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3355 PL_doextract = FALSE;
6e72f9df
PP
3356 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3357 s2 = s;
3358 while (*s == ' ' || *s == '\t') s++;
3359 if (*s++ == '-') {
3360 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3361 if (strnEQ(s2-4,"perl",4))
3362 /*SUPPRESS 530*/
155aba94
GS
3363 while ((s = moreswitches(s)))
3364 ;
33b78306 3365 }
95e8664e 3366#ifdef MACOS_TRADITIONAL
e55ac0fa
HS
3367 /* We are always searching for the #!perl line in MacPerl,
3368 * so if we find it, still keep the line count correct
3369 * by counting lines we already skipped over
3370 */
3371 for (; maclines > 0 ; maclines--)
3372 PerlIO_ungetc(PL_rsfp, '\n');
3373
95e8664e 3374 break;
e55ac0fa
HS
3375
3376 /* gMacPerl_AlwaysExtract is false in MPW tool */
3377 } else if (gMacPerl_AlwaysExtract) {
3378 ++maclines;
95e8664e 3379#endif
83025b21
LW
3380 }
3381 }
3382}
3383
afe37c7d 3384
76e3520e 3385STATIC void
cea2e8a9 3386S_init_ids(pTHX)
352d5a3a 3387{
d8eceb89
JH
3388 PL_uid = PerlProc_getuid();
3389 PL_euid = PerlProc_geteuid();
3390 PL_gid = PerlProc_getgid();
3391 PL_egid = PerlProc_getegid();
748a9306 3392#ifdef VMS
b28d0864
NIS
3393 PL_uid |= PL_gid << 16;
3394 PL_euid |= PL_egid << 16;
748a9306 3395#endif
22f7c9c9
JH
3396 /* Should not happen: */
3397 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3280af22 3398 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3399}
79072805 3400
a0643315
JH
3401/* This is used very early in the lifetime of the program,
3402 * before even the options are parsed, so PL_tainting has
af419de7
JH
3403 * not been initialized properly. The variable PL_earlytaint
3404 * is set early in main() to the result of this function. */
3405bool
22f7c9c9
JH
3406Perl_doing_taint(int argc, char *argv[], char *envp[])
3407{
af419de7 3408 int uid = PerlProc_getuid();
22f7c9c9 3409 int euid = PerlProc_geteuid();
af419de7 3410 int gid = PerlProc_getgid();
22f7c9c9
JH
3411 int egid = PerlProc_getegid();
3412
3413#ifdef VMS
af419de7 3414 uid |= gid << 16;
22f7c9c9
JH
3415 euid |= egid << 16;
3416#endif
3417 if (uid && (euid != uid || egid != gid))
3418 return 1;
af419de7
JH
3419 /* This is a really primitive check; environment gets ignored only
3420 * if -T are the first chars together; otherwise one gets
3421 * "Too late" message. */
22f7c9c9
JH
3422 if ( argc > 1 && argv[1][0] == '-'
3423 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3424 return 1;
3425 return 0;
3426}
22f7c9c9 3427
76e3520e 3428STATIC void
cea2e8a9 3429S_forbid_setid(pTHX_ char *s)
bbce6d69 3430{
3280af22 3431 if (PL_euid != PL_uid)
cea2e8a9 3432 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3433 if (PL_egid != PL_gid)
cea2e8a9 3434 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69
PP
3435}
3436
1ee4443e
IZ
3437void
3438Perl_init_debugger(pTHX)
748a9306 3439{
1ee4443e
IZ
3440 HV *ostash = PL_curstash;
3441
3280af22
NIS
3442 PL_curstash = PL_debstash;
3443 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
3444 AvREAL_off(PL_dbargs);
3445 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
3446 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
3447 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3448 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3280af22 3449 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3450 sv_setiv(PL_DBsingle, 0);
3280af22 3451 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3452 sv_setiv(PL_DBtrace, 0);
3280af22 3453 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3454 sv_setiv(PL_DBsignal, 0);
06492da6
SF
3455 PL_DBassertion = GvSV((gv_fetchpv("assertion", GV_ADDMULTI, SVt_PV)));
3456 sv_setiv(PL_DBassertion, 0);
1ee4443e 3457 PL_curstash = ostash;
352d5a3a
LW
3458}
3459
2ce36478
SM
3460#ifndef STRESS_REALLOC
3461#define REASONABLE(size) (size)
3462#else
3463#define REASONABLE(size) (1) /* unreasonable */
3464#endif
3465
11343788 3466void
cea2e8a9 3467Perl_init_stacks(pTHX)
79072805 3468{
e336de0d 3469 /* start with 128-item stack and 8K cxstack */
3280af22 3470 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3471 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3280af22
NIS
3472 PL_curstackinfo->si_type = PERLSI_MAIN;
3473 PL_curstack = PL_curstackinfo->si_stack;
3474 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
79072805 3475
3280af22
NIS
3476 PL_stack_base = AvARRAY(PL_curstack);
3477 PL_stack_sp = PL_stack_base;
3478 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
8990e307 3479
3280af22
NIS
3480 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3481 PL_tmps_floor = -1;
3482 PL_tmps_ix = -1;
3483 PL_tmps_max = REASONABLE(128);
8990e307 3484
3280af22
NIS
3485 New(54,PL_markstack,REASONABLE(32),I32);
3486 PL_markstack_ptr = PL_markstack;
3487 PL_markstack_max = PL_markstack + REASONABLE(32);
79072805 3488
ce2f7c3b 3489 SET_MARK_OFFSET;
e336de0d 3490
3280af22
NIS
3491 New(54,PL_scopestack,REASONABLE(32),I32);
3492 PL_scopestack_ix = 0;
3493 PL_scopestack_max = REASONABLE(32);
79072805 3494
3280af22
NIS
3495 New(54,PL_savestack,REASONABLE(128),ANY);
3496 PL_savestack_ix = 0;
3497 PL_savestack_max = REASONABLE(128);
79072805 3498
3280af22
NIS
3499 New(54,PL_retstack,REASONABLE(16),OP*);
3500 PL_retstack_ix = 0;
3501 PL_retstack_max = REASONABLE(16);
378cc40b 3502}
33b78306 3503
2ce36478
SM
3504#undef REASONABLE
3505
76e3520e 3506STATIC void
cea2e8a9 3507S_nuke_stacks(pTHX)
6e72f9df 3508{
3280af22
NIS
3509 while (PL_curstackinfo->si_next)
3510 PL_curstackinfo = PL_curstackinfo->si_next;
3511 while (PL_curstackinfo) {
3512 PERL_SI *p = PL_curstackinfo->si_prev;