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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
8990e307 277 ENTER;
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278}
279
954c1994 280/*
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281=for apidoc nothreadhook
282
283Stub that provides thread hook for perl_destruct when there are
284no threads.
285
286=cut
287*/
288
289int
4e9e3734 290Perl_nothreadhook(pTHX)
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291{
292 return 0;
293}
294
295/*
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296=for apidoc perl_destruct
297
298Shuts down a Perl interpreter. See L<perlembed>.
299
300=cut
301*/
302
31d77e54 303int
0cb96387 304perl_destruct(pTHXx)
79072805 305{
7c474504 306 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 307 HV *hv;
4d1ff10f 308#ifdef USE_5005THREADS
cea2e8a9 309 dTHX;
4d1ff10f 310#endif /* USE_5005THREADS */
8990e307 311
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312 /* wait for all pseudo-forked children to finish */
313 PERL_WAIT_FOR_CHILDREN;
314
3280af22 315 destruct_level = PL_perl_destruct_level;
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316#ifdef DEBUGGING
317 {
318 char *s;
155aba94 319 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
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320 int i = atoi(s);
321 if (destruct_level < i)
322 destruct_level = i;
323 }
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324 }
325#endif
326
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327
328 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
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329 dJMPENV;
330 int x = 0;
331
332 JMPENV_PUSH(x);
333 if (PL_endav && !PL_minus_c)
334 call_list(PL_scopestack_ix, PL_endav);
335 JMPENV_POP;
26f423df 336 }
f3faeb53 337 LEAVE;
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338 FREETMPS;
339
e00b64d4 340 /* Need to flush since END blocks can produce output */
f13a2bc0 341 my_fflush_all();
e00b64d4 342
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343 if (CALL_FPTR(PL_threadhook)(aTHX)) {
344 /* Threads hook has vetoed further cleanup */
b47cad08 345 return STATUS_NATIVE_EXPORT;
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346 }
347
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348 /* We must account for everything. */
349
350 /* Destroy the main CV and syntax tree */
3280af22 351 if (PL_main_root) {
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352 op_free(PL_main_root);
353 PL_main_root = Nullop;
a0d0e21e 354 }
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NIS
355 PL_curcop = &PL_compiling;
356 PL_main_start = Nullop;
357 SvREFCNT_dec(PL_main_cv);
358 PL_main_cv = Nullcv;
24d3c518 359 PL_dirty = TRUE;
ff0cee69 360
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NIS
361 /* Tell PerlIO we are about to tear things apart in case
362 we have layers which are using resources that should
363 be cleaned up now.
364 */
365
366 PerlIO_destruct(aTHX);
367
3280af22 368 if (PL_sv_objcount) {
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369 /*
370 * Try to destruct global references. We do this first so that the
371 * destructors and destructees still exist. Some sv's might remain.
372 * Non-referenced objects are on their own.
373 */
a0d0e21e 374 sv_clean_objs();
8990e307
LW
375 }
376
5cd24f17 377 /* unhook hooks which will soon be, or use, destroyed data */
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378 SvREFCNT_dec(PL_warnhook);
379 PL_warnhook = Nullsv;
380 SvREFCNT_dec(PL_diehook);
381 PL_diehook = Nullsv;
5cd24f17 382
4b556e6c 383 /* call exit list functions */
3280af22 384 while (PL_exitlistlen-- > 0)
acfe0abc 385 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 386
3280af22 387 Safefree(PL_exitlist);
4b556e6c 388
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389 PL_exitlist = NULL;
390 PL_exitlistlen = 0;
391
a0d0e21e 392 if (destruct_level == 0){
8990e307 393
a0d0e21e 394 DEBUG_P(debprofdump());
ac27b0f5 395
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396#if defined(PERLIO_LAYERS)
397 /* No more IO - including error messages ! */
398 PerlIO_cleanup(aTHX);
399#endif
400
a0d0e21e 401 /* The exit() function will do everything that needs doing. */
b47cad08 402 return STATUS_NATIVE_EXPORT;
a0d0e21e 403 }
5dd60ef7 404
551a8b83 405 /* jettison our possibly duplicated environment */
4b647fb0
DM
406 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
407 * so we certainly shouldn't free it here
408 */
409#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
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GS
410 if (environ != PL_origenviron
411#ifdef USE_ITHREADS
412 /* only main thread can free environ[0] contents */
413 && PL_curinterp == aTHX
414#endif
415 )
416 {
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417 I32 i;
418
419 for (i = 0; environ[i]; i++)
4b420006 420 safesysfree(environ[i]);
0631ea03 421
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422 /* Must use safesysfree() when working with environ. */
423 safesysfree(environ);
551a8b83
JH
424
425 environ = PL_origenviron;
426 }
427#endif
428
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429#ifdef USE_ITHREADS
430 /* the syntax tree is shared between clones
431 * so op_free(PL_main_root) only ReREFCNT_dec's
432 * REGEXPs in the parent interpreter
433 * we need to manually ReREFCNT_dec for the clones
434 */
435 {
436 I32 i = AvFILLp(PL_regex_padav) + 1;
437 SV **ary = AvARRAY(PL_regex_padav);
438
439 while (i) {
35061a7e 440 SV *resv = ary[--i];
ba89bb6e 441 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM
442
443 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 444 /* this is PL_reg_curpm, already freed
35061a7e
DM
445 * flag is set in regexec.c:S_regtry
446 */
447 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 448 }
1cc8b4c5
AB
449 else if(SvREPADTMP(resv)) {
450 SvREPADTMP_off(resv);
451 }
35061a7e 452 else {
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DM
453 ReREFCNT_dec(re);
454 }
455 }
456 }
457 SvREFCNT_dec(PL_regex_padav);
458 PL_regex_padav = Nullav;
459 PL_regex_pad = NULL;
460#endif
461
081fc587
AB
462 SvREFCNT_dec((SV*) PL_stashcache);
463 PL_stashcache = NULL;
464
5f05dabc
PP
465 /* loosen bonds of global variables */
466
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467 if(PL_rsfp) {
468 (void)PerlIO_close(PL_rsfp);
469 PL_rsfp = Nullfp;
8ebc5c01
PP
470 }
471
472 /* Filters for program text */
3280af22
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473 SvREFCNT_dec(PL_rsfp_filters);
474 PL_rsfp_filters = Nullav;
8ebc5c01
PP
475
476 /* switches */
3280af22
NIS
477 PL_preprocess = FALSE;
478 PL_minus_n = FALSE;
479 PL_minus_p = FALSE;
480 PL_minus_l = FALSE;
481 PL_minus_a = FALSE;
482 PL_minus_F = FALSE;
483 PL_doswitches = FALSE;
599cee73 484 PL_dowarn = G_WARN_OFF;
3280af22
NIS
485 PL_doextract = FALSE;
486 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
487 PL_unsafe = FALSE;
488
489 Safefree(PL_inplace);
490 PL_inplace = Nullch;
a7cb1f99 491 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
492
493 if (PL_e_script) {
494 SvREFCNT_dec(PL_e_script);
495 PL_e_script = Nullsv;
8ebc5c01
PP
496 }
497
498 /* magical thingies */
499
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NIS
500 SvREFCNT_dec(PL_ofs_sv); /* $, */
501 PL_ofs_sv = Nullsv;
5f05dabc 502
7889fe52
NIS
503 SvREFCNT_dec(PL_ors_sv); /* $\ */
504 PL_ors_sv = Nullsv;
8ebc5c01 505
3280af22
NIS
506 SvREFCNT_dec(PL_rs); /* $/ */
507 PL_rs = Nullsv;
dc92893f 508
d33b2eba
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509 PL_multiline = 0; /* $* */
510 Safefree(PL_osname); /* $^O */
511 PL_osname = Nullch;
5f05dabc 512
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NIS
513 SvREFCNT_dec(PL_statname);
514 PL_statname = Nullsv;
515 PL_statgv = Nullgv;
5f05dabc 516
8ebc5c01
PP
517 /* defgv, aka *_ should be taken care of elsewhere */
518
8ebc5c01 519 /* clean up after study() */
3280af22
NIS
520 SvREFCNT_dec(PL_lastscream);
521 PL_lastscream = Nullsv;
522 Safefree(PL_screamfirst);
523 PL_screamfirst = 0;
524 Safefree(PL_screamnext);
525 PL_screamnext = 0;
8ebc5c01 526
7d5ea4e7
GS
527 /* float buffer */
528 Safefree(PL_efloatbuf);
529 PL_efloatbuf = Nullch;
530 PL_efloatsize = 0;
531
8ebc5c01 532 /* startup and shutdown function lists */
3280af22 533 SvREFCNT_dec(PL_beginav);
5a837c8f 534 SvREFCNT_dec(PL_beginav_save);
3280af22 535 SvREFCNT_dec(PL_endav);
7d30b5c4 536 SvREFCNT_dec(PL_checkav);
ece599bd 537 SvREFCNT_dec(PL_checkav_save);
3280af22
NIS
538 SvREFCNT_dec(PL_initav);
539 PL_beginav = Nullav;
5a837c8f 540 PL_beginav_save = Nullav;
3280af22 541 PL_endav = Nullav;
7d30b5c4 542 PL_checkav = Nullav;
ece599bd 543 PL_checkav_save = Nullav;
3280af22 544 PL_initav = Nullav;
5618dfe8 545
8ebc5c01 546 /* shortcuts just get cleared */
3280af22 547 PL_envgv = Nullgv;
3280af22
NIS
548 PL_incgv = Nullgv;
549 PL_hintgv = Nullgv;
550 PL_errgv = Nullgv;
551 PL_argvgv = Nullgv;
552 PL_argvoutgv = Nullgv;
553 PL_stdingv = Nullgv;
bf49b057 554 PL_stderrgv = Nullgv;
3280af22
NIS
555 PL_last_in_gv = Nullgv;
556 PL_replgv = Nullgv;
5c831c24 557 PL_debstash = Nullhv;
8ebc5c01
PP
558
559 /* reset so print() ends up where we expect */
560 setdefout(Nullgv);
5c831c24 561
7a1c5554
GS
562 SvREFCNT_dec(PL_argvout_stack);
563 PL_argvout_stack = Nullav;
8ebc5c01 564
5c831c24
GS
565 SvREFCNT_dec(PL_modglobal);
566 PL_modglobal = Nullhv;
567 SvREFCNT_dec(PL_preambleav);
568 PL_preambleav = Nullav;
569 SvREFCNT_dec(PL_subname);
570 PL_subname = Nullsv;
571 SvREFCNT_dec(PL_linestr);
572 PL_linestr = Nullsv;
573 SvREFCNT_dec(PL_pidstatus);
574 PL_pidstatus = Nullhv;
575 SvREFCNT_dec(PL_toptarget);
576 PL_toptarget = Nullsv;
577 SvREFCNT_dec(PL_bodytarget);
578 PL_bodytarget = Nullsv;
579 PL_formtarget = Nullsv;
580
d33b2eba 581 /* free locale stuff */
b9582b6a 582#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
583 Safefree(PL_collation_name);
584 PL_collation_name = Nullch;
b9582b6a 585#endif
d33b2eba 586
b9582b6a 587#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
588 Safefree(PL_numeric_name);
589 PL_numeric_name = Nullch;
a453c169 590 SvREFCNT_dec(PL_numeric_radix_sv);
b9582b6a 591#endif
d33b2eba 592
5c831c24
GS
593 /* clear utf8 character classes */
594 SvREFCNT_dec(PL_utf8_alnum);
595 SvREFCNT_dec(PL_utf8_alnumc);
596 SvREFCNT_dec(PL_utf8_ascii);
597 SvREFCNT_dec(PL_utf8_alpha);
598 SvREFCNT_dec(PL_utf8_space);
599 SvREFCNT_dec(PL_utf8_cntrl);
600 SvREFCNT_dec(PL_utf8_graph);
601 SvREFCNT_dec(PL_utf8_digit);
602 SvREFCNT_dec(PL_utf8_upper);
603 SvREFCNT_dec(PL_utf8_lower);
604 SvREFCNT_dec(PL_utf8_print);
605 SvREFCNT_dec(PL_utf8_punct);
606 SvREFCNT_dec(PL_utf8_xdigit);
607 SvREFCNT_dec(PL_utf8_mark);
608 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 609 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 610 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 611 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH
612 SvREFCNT_dec(PL_utf8_idstart);
613 SvREFCNT_dec(PL_utf8_idcont);
5c831c24
GS
614 PL_utf8_alnum = Nullsv;
615 PL_utf8_alnumc = Nullsv;
616 PL_utf8_ascii = Nullsv;
617 PL_utf8_alpha = Nullsv;
618 PL_utf8_space = Nullsv;
619 PL_utf8_cntrl = Nullsv;
620 PL_utf8_graph = Nullsv;
621 PL_utf8_digit = Nullsv;
622 PL_utf8_upper = Nullsv;
623 PL_utf8_lower = Nullsv;
624 PL_utf8_print = Nullsv;
625 PL_utf8_punct = Nullsv;
626 PL_utf8_xdigit = Nullsv;
627 PL_utf8_mark = Nullsv;
628 PL_utf8_toupper = Nullsv;
629 PL_utf8_totitle = Nullsv;
630 PL_utf8_tolower = Nullsv;
b4e400f9 631 PL_utf8_tofold = Nullsv;
82686b01
JH
632 PL_utf8_idstart = Nullsv;
633 PL_utf8_idcont = Nullsv;
5c831c24 634
971a9dd3
GS
635 if (!specialWARN(PL_compiling.cop_warnings))
636 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 637 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
638 if (!specialCopIO(PL_compiling.cop_io))
639 SvREFCNT_dec(PL_compiling.cop_io);
640 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS
641 CopFILE_free(&PL_compiling);
642 CopSTASH_free(&PL_compiling);
5c831c24 643
a0d0e21e 644 /* Prepare to destruct main symbol table. */
5f05dabc 645
3280af22
NIS
646 hv = PL_defstash;
647 PL_defstash = 0;
a0d0e21e 648 SvREFCNT_dec(hv);
5c831c24
GS
649 SvREFCNT_dec(PL_curstname);
650 PL_curstname = Nullsv;
a0d0e21e 651
5a844595
GS
652 /* clear queued errors */
653 SvREFCNT_dec(PL_errors);
654 PL_errors = Nullsv;
655
a0d0e21e 656 FREETMPS;
0453d815 657 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 658 if (PL_scopestack_ix != 0)
9014280d 659 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 660 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
661 (long)PL_scopestack_ix);
662 if (PL_savestack_ix != 0)
9014280d 663 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 664 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
665 (long)PL_savestack_ix);
666 if (PL_tmps_floor != -1)
9014280d 667 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 668 (long)PL_tmps_floor + 1);
a0d0e21e 669 if (cxstack_ix != -1)
9014280d 670 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 671 (long)cxstack_ix + 1);
a0d0e21e 672 }
8990e307
LW
673
674 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 675 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 676 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
677
678 /* the 2 is for PL_fdpid and PL_strtab */
679 while (PL_sv_count > 2 && sv_clean_all())
680 ;
681
d33b2eba
GS
682 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
683 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
684 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
685 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 686
d4777f27
GS
687 AvREAL_off(PL_fdpid); /* no surviving entries */
688 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
689 PL_fdpid = Nullav;
690
6c644e78
GS
691#ifdef HAVE_INTERP_INTERN
692 sys_intern_clear();
693#endif
694
6e72f9df
PP
695 /* Destruct the global string table. */
696 {
697 /* Yell and reset the HeVAL() slots that are still holding refcounts,
698 * so that sv_free() won't fail on them.
699 */
700 I32 riter;
701 I32 max;
702 HE *hent;
703 HE **array;
704
705 riter = 0;
3280af22
NIS
706 max = HvMAX(PL_strtab);
707 array = HvARRAY(PL_strtab);
6e72f9df
PP
708 hent = array[0];
709 for (;;) {
0453d815 710 if (hent && ckWARN_d(WARN_INTERNAL)) {
9014280d 711 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 712 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
713 HeVAL(hent) - Nullsv, HeKEY(hent));
714 HeVAL(hent) = Nullsv;
715 hent = HeNEXT(hent);
716 }
717 if (!hent) {
718 if (++riter > max)
719 break;
720 hent = array[riter];
721 }
722 }
723 }
3280af22 724 SvREFCNT_dec(PL_strtab);
6e72f9df 725
e652bb2f 726#ifdef USE_ITHREADS
a0739874
DM
727 /* free the pointer table used for cloning */
728 ptr_table_free(PL_ptr_table);
53186e96 729#endif
a0739874 730
d33b2eba
GS
731 /* free special SVs */
732
733 SvREFCNT(&PL_sv_yes) = 0;
734 sv_clear(&PL_sv_yes);
735 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 736 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
737
738 SvREFCNT(&PL_sv_no) = 0;
739 sv_clear(&PL_sv_no);
740 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 741 SvFLAGS(&PL_sv_no) = 0;
01724ea0 742
9f375a43
DM
743 {
744 int i;
745 for (i=0; i<=2; i++) {
746 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
747 sv_clear(PERL_DEBUG_PAD(i));
748 SvANY(PERL_DEBUG_PAD(i)) = NULL;
749 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
750 }
751 }
752
0453d815 753 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 754 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 755
eba0f806
DM
756#ifdef DEBUG_LEAKING_SCALARS
757 if (PL_sv_count != 0) {
758 SV* sva;
759 SV* sv;
760 register SV* svend;
761
762 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
763 svend = &sva[SvREFCNT(sva)];
764 for (sv = sva + 1; sv < svend; ++sv) {
765 if (SvTYPE(sv) != SVTYPEMASK) {
766 PerlIO_printf(Perl_debug_log, "leaked: 0x%p\n", sv);
767 }
768 }
769 }
770 }
771#endif
772
773
56a2bab7 774#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
775 /* No more IO - including error messages ! */
776 PerlIO_cleanup(aTHX);
777#endif
778
9f4bd222
NIS
779 /* sv_undef needs to stay immortal until after PerlIO_cleanup
780 as currently layers use it rather than Nullsv as a marker
781 for no arg - and will try and SvREFCNT_dec it.
782 */
783 SvREFCNT(&PL_sv_undef) = 0;
784 SvREADONLY_off(&PL_sv_undef);
785
3280af22 786 Safefree(PL_origfilename);
3280af22 787 Safefree(PL_reg_start_tmp);
5c5e4c24
IZ
788 if (PL_reg_curpm)
789 Safefree(PL_reg_curpm);
82ba1be6 790 Safefree(PL_reg_poscache);
dd28f7bb 791 free_tied_hv_pool();
3280af22 792 Safefree(PL_op_mask);
cf36064f
GS
793 Safefree(PL_psig_ptr);
794 Safefree(PL_psig_name);
2c2666fc 795 Safefree(PL_bitcount);
ce08f86c 796 Safefree(PL_psig_pend);
6e72f9df 797 nuke_stacks();
3280af22 798 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
ac27b0f5 799
a0d0e21e 800 DEBUG_P(debprofdump());
d33b2eba 801
e5dd39fc 802#ifdef USE_REENTRANT_API
10bc17b6 803 Perl_reentrant_free(aTHX);
e5dd39fc
AB
804#endif
805
612f20c3
GS
806 sv_free_arenas();
807
fc36a67e
PP
808 /* As the absolutely last thing, free the non-arena SV for mess() */
809
3280af22 810 if (PL_mess_sv) {
9c63abab
GS
811 /* it could have accumulated taint magic */
812 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
813 MAGIC* mg;
814 MAGIC* moremagic;
815 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
816 moremagic = mg->mg_moremagic;
14befaf4
DM
817 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
818 && mg->mg_len >= 0)
9c63abab
GS
819 Safefree(mg->mg_ptr);
820 Safefree(mg);
821 }
822 }
fc36a67e 823 /* we know that type >= SVt_PV */
155aba94 824 (void)SvOOK_off(PL_mess_sv);
3280af22
NIS
825 Safefree(SvPVX(PL_mess_sv));
826 Safefree(SvANY(PL_mess_sv));
827 Safefree(PL_mess_sv);
828 PL_mess_sv = Nullsv;
fc36a67e 829 }
31d77e54 830 return STATUS_NATIVE_EXPORT;
79072805
LW
831}
832
954c1994
GS
833/*
834=for apidoc perl_free
835
836Releases a Perl interpreter. See L<perlembed>.
837
838=cut
839*/
840
79072805 841void
0cb96387 842perl_free(pTHXx)
79072805 843{
acfe0abc 844#if defined(WIN32) || defined(NETWARE)
ce3e5b80 845# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
846# ifdef NETWARE
847 void *host = nw_internal_host;
848# else
849 void *host = w32_internal_host;
850# endif
ce3e5b80 851 PerlMem_free(aTHXx);
acfe0abc 852# ifdef NETWARE
011f1a1a 853 nw_delete_internal_host(host);
acfe0abc
GS
854# else
855 win32_delete_internal_host(host);
856# endif
1c0ca838
GS
857# else
858 PerlMem_free(aTHXx);
859# endif
acfe0abc
GS
860#else
861 PerlMem_free(aTHXx);
76e3520e 862#endif
79072805
LW
863}
864
4b556e6c 865void
864dbfa3 866Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 867{
3280af22
NIS
868 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
869 PL_exitlist[PL_exitlistlen].fn = fn;
870 PL_exitlist[PL_exitlistlen].ptr = ptr;
871 ++PL_exitlistlen;
4b556e6c
JD
872}
873
954c1994
GS
874/*
875=for apidoc perl_parse
876
877Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
878
879=cut
880*/
881
79072805 882int
0cb96387 883perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 884{
6224f72b 885 I32 oldscope;
6224f72b 886 int ret;
db36c5a1 887 dJMPENV;
4d1ff10f 888#ifdef USE_5005THREADS
cea2e8a9
GS
889 dTHX;
890#endif
8d063cd8 891
a687059c
LW
892#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
893#ifdef IAMSUID
894#undef IAMSUID
cea2e8a9 895 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c
LW
896setuid perl scripts securely.\n");
897#endif
898#endif
899
b0891165
JH
900#if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
901 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
902 * This MUST be done before any hash stores or fetches take place. */
903 {
183c3da1 904 char *s = PerlEnv_getenv("PERL_HASH_SEED");
b0891165
JH
905 if (s)
906 while (isSPACE(*s)) s++;
907 if (s && isDIGIT(*s))
908 PL_hash_seed = (UV)Atoul(s);
909#ifndef USE_HASH_SEED_EXPLICIT
910 else {
911 /* Compute a random seed */
912 (void)seedDrand01((Rand_seed_t)seed());
913 PL_srand_called = TRUE;
914 PL_hash_seed = (UV)(Drand01() * (NV)UV_MAX);
915#if RANDBITS < (UVSIZE * 8)
822df561
JH
916 /* Since there are not enough randbits to to reach all
917 * the bits of a UV, the low bits might need extra
918 * help. Sum in another random number that will
919 * fill in the low bits. */
920 PL_hash_seed +=
921 (UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1));
b0891165
JH
922#endif /* RANDBITS < (UVSIZE * 8) */
923 }
a782b1cc 924#endif /* #ifndef USE_HASH_SEED_EXPLICIT */
73613073 925 if ((s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG")))
b0891165
JH
926 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n",
927 PL_hash_seed);
928 }
929#endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
930
3280af22 931 PL_origargc = argc;
e2975953 932 PL_origargv = argv;
a0d0e21e 933
54bfe034 934 {
3cb9023d
JH
935 /* Set PL_origalen be the sum of the contiguous argv[]
936 * elements plus the size of the env in case that it is
937 * contiguous with the argv[]. This is used in mg.c:mg_set()
938 * as the maximum modifiable length of $0. In the worst case
939 * the area we are able to modify is limited to the size of
43c32782 940 * the original argv[0]. (See below for 'contiguous', though.)
3cb9023d
JH
941 * --jhi */
942 char *s;
54bfe034 943 int i;
7d8e7db3
JH
944 UV mask =
945 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
43c32782
JH
946 /* Do the mask check only if the args seem like aligned. */
947 UV aligned =
948 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
949
950 /* See if all the arguments are contiguous in memory. Note
951 * that 'contiguous' is a loose term because some platforms
952 * align the argv[] and the envp[]. If the arguments look
953 * like non-aligned, assume that they are 'strictly' or
954 * 'traditionally' contiguous. If the arguments look like
955 * aligned, we just check that they are within aligned
956 * PTRSIZE bytes. As long as no system has something bizarre
957 * like the argv[] interleaved with some other data, we are
958 * fine. (Did I just evoke Murphy's Law?) --jhi */
3cb9023d
JH
959 s = PL_origargv[0];
960 while (*s) s++;
54bfe034 961 for (i = 1; i < PL_origargc; i++) {
43c32782
JH
962 if ((PL_origargv[i] == s + 1
963#ifdef OS2
964 || PL_origargv[i] == s + 2
965#endif
966 )
967 ||
968 (aligned &&
969 (PL_origargv[i] > s &&
970 PL_origargv[i] <=
971 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
972 )
973 {
3cb9023d
JH
974 s = PL_origargv[i];
975 while (*s) s++;
54bfe034
JH
976 }
977 else
978 break;
979 }
3cb9023d 980 /* Can we grab env area too to be used as the area for $0? */
43c32782
JH
981 if (PL_origenviron) {
982 if ((PL_origenviron[0] == s + 1
983#ifdef OS2
984 || (PL_origenviron[0] == s + 9 && (s += 8))
985#endif
986 )
987 ||
988 (aligned &&
989 (PL_origenviron[0] > s &&
990 PL_origenviron[0] <=
991 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
992 )
993 {
994#ifndef OS2
995 s = PL_origenviron[0];
996 while (*s) s++;
997#endif
998 my_setenv("NoNe SuCh", Nullch);
999 /* Force copy of environment. */
1000 for (i = 1; PL_origenviron[i]; i++) {
1001 if (PL_origenviron[i] == s + 1
1002 ||
1003 (aligned &&
1004 (PL_origenviron[i] > s &&
1005 PL_origenviron[i] <=
1006 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1007 )
1008 {
1009 s = PL_origenviron[i];
1010 while (*s) s++;
1011 }
1012 else
1013 break;
54bfe034 1014 }
43c32782 1015 }
54bfe034
JH
1016 }
1017 PL_origalen = s - PL_origargv[0];
1018 }
1019
3280af22 1020 if (PL_do_undump) {
a0d0e21e
LW
1021
1022 /* Come here if running an undumped a.out. */
1023
3280af22
NIS
1024 PL_origfilename = savepv(argv[0]);
1025 PL_do_undump = FALSE;
a0d0e21e 1026 cxstack_ix = -1; /* start label stack again */
748a9306 1027 init_ids();
a0d0e21e
LW
1028 init_postdump_symbols(argc,argv,env);
1029 return 0;
1030 }
1031
3280af22 1032 if (PL_main_root) {
3280af22
NIS
1033 op_free(PL_main_root);
1034 PL_main_root = Nullop;
ff0cee69 1035 }
3280af22
NIS
1036 PL_main_start = Nullop;
1037 SvREFCNT_dec(PL_main_cv);
1038 PL_main_cv = Nullcv;
79072805 1039
3280af22
NIS
1040 time(&PL_basetime);
1041 oldscope = PL_scopestack_ix;
599cee73 1042 PL_dowarn = G_WARN_OFF;
f86702cc 1043
14dd3ad8
GS
1044#ifdef PERL_FLEXIBLE_EXCEPTIONS
1045 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
1046#else
1047 JMPENV_PUSH(ret);
1048#endif
6224f72b 1049 switch (ret) {
312caa8e 1050 case 0:
14dd3ad8
GS
1051#ifndef PERL_FLEXIBLE_EXCEPTIONS
1052 parse_body(env,xsinit);
1053#endif
7d30b5c4
GS
1054 if (PL_checkav)
1055 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1056 ret = 0;
1057 break;
6224f72b
GS
1058 case 1:
1059 STATUS_ALL_FAILURE;
1060 /* FALL THROUGH */
1061 case 2:
1062 /* my_exit() was called */
3280af22 1063 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1064 LEAVE;
1065 FREETMPS;
3280af22 1066 PL_curstash = PL_defstash;
7d30b5c4
GS
1067 if (PL_checkav)
1068 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1069 ret = STATUS_NATIVE_EXPORT;
1070 break;
6224f72b 1071 case 3:
bf49b057 1072 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1073 ret = 1;
1074 break;
6224f72b 1075 }
14dd3ad8
GS
1076 JMPENV_POP;
1077 return ret;
1078}
1079
1080#ifdef PERL_FLEXIBLE_EXCEPTIONS
1081STATIC void *
1082S_vparse_body(pTHX_ va_list args)
1083{
1084 char **env = va_arg(args, char**);
1085 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1086
1087 return parse_body(env, xsinit);
312caa8e 1088}
14dd3ad8 1089#endif
312caa8e
CS
1090
1091STATIC void *
14dd3ad8 1092S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1093{
312caa8e
CS
1094 int argc = PL_origargc;
1095 char **argv = PL_origargv;
312caa8e
CS
1096 char *scriptname = NULL;
1097 int fdscript = -1;
1098 VOL bool dosearch = FALSE;
1099 char *validarg = "";
312caa8e
CS
1100 register SV *sv;
1101 register char *s;
cf756827 1102 char *cddir = Nullch;
312caa8e 1103
3280af22 1104 sv_setpvn(PL_linestr,"",0);
79cb57f6 1105 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1106 SAVEFREESV(sv);
1107 init_main_stash();
54310121 1108
6224f72b
GS
1109 for (argc--,argv++; argc > 0; argc--,argv++) {
1110 if (argv[0][0] != '-' || !argv[0][1])
1111 break;
1112#ifdef DOSUID
1113 if (*validarg)
1114 validarg = " PHOOEY ";
1115 else
1116 validarg = argv[0];
13281fa4 1117#endif
6224f72b
GS
1118 s = argv[0]+1;
1119 reswitch:
1120 switch (*s) {
729a02f2 1121 case 'C':
1d5472a9
GS
1122#ifndef PERL_STRICT_CR
1123 case '\r':
1124#endif
6224f72b
GS
1125 case ' ':
1126 case '0':
1127 case 'F':
1128 case 'a':
1129 case 'c':
1130 case 'd':
1131 case 'D':
1132 case 'h':
1133 case 'i':
1134 case 'l':
1135 case 'M':
1136 case 'm':
1137 case 'n':
1138 case 'p':
1139 case 's':
1140 case 'u':
1141 case 'U':
1142 case 'v':
599cee73
PM
1143 case 'W':
1144 case 'X':
6224f72b 1145 case 'w':
06492da6 1146 case 'A':
155aba94 1147 if ((s = moreswitches(s)))
6224f72b
GS
1148 goto reswitch;
1149 break;
33b78306 1150
1dbad523 1151 case 't':
22f7c9c9 1152 CHECK_MALLOC_TOO_LATE_FOR('t');
317ea90d
MS
1153 if( !PL_tainting ) {
1154 PL_taint_warn = TRUE;
1155 PL_tainting = TRUE;
1156 }
1157 s++;
1158 goto reswitch;
6224f72b 1159 case 'T':
22f7c9c9 1160 CHECK_MALLOC_TOO_LATE_FOR('T');
3280af22 1161 PL_tainting = TRUE;
317ea90d 1162 PL_taint_warn = FALSE;
6224f72b
GS
1163 s++;
1164 goto reswitch;
f86702cc 1165
6224f72b 1166 case 'e':
bf4acbe4
GS
1167#ifdef MACOS_TRADITIONAL
1168 /* ignore -e for Dev:Pseudo argument */
1169 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
e55ac0fa 1170 break;
bf4acbe4 1171#endif
3280af22 1172 if (PL_euid != PL_uid || PL_egid != PL_gid)
cea2e8a9 1173 Perl_croak(aTHX_ "No -e allowed in setuid scripts");
3280af22 1174 if (!PL_e_script) {
79cb57f6 1175 PL_e_script = newSVpvn("",0);
0cb96387 1176 filter_add(read_e_script, NULL);
6224f72b
GS
1177 }
1178 if (*++s)
3280af22 1179 sv_catpv(PL_e_script, s);
6224f72b 1180 else if (argv[1]) {
3280af22 1181 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1182 argc--,argv++;
1183 }
1184 else
cea2e8a9 1185 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1186 sv_catpv(PL_e_script, "\n");
6224f72b 1187 break;
afe37c7d 1188
6224f72b
GS
1189 case 'I': /* -I handled both here and in moreswitches() */
1190 forbid_setid("-I");
1191 if (!*++s && (s=argv[1]) != Nullch) {
1192 argc--,argv++;
1193 }
6224f72b 1194 if (s && *s) {
0df16ed7
GS
1195 char *p;
1196 STRLEN len = strlen(s);
1197 p = savepvn(s, len);
574c798a 1198 incpush(p, TRUE, TRUE, FALSE);
0df16ed7
GS
1199 sv_catpvn(sv, "-I", 2);
1200 sv_catpvn(sv, p, len);
1201 sv_catpvn(sv, " ", 1);
6224f72b 1202 Safefree(p);
0df16ed7
GS
1203 }
1204 else
a67e862a 1205 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1206 break;
1207 case 'P':
1208 forbid_setid("-P");
3280af22 1209 PL_preprocess = TRUE;
6224f72b
GS
1210 s++;
1211 goto reswitch;
1212 case 'S':
1213 forbid_setid("-S");
1214 dosearch = TRUE;
1215 s++;
1216 goto reswitch;
1217 case 'V':
3280af22
NIS
1218 if (!PL_preambleav)
1219 PL_preambleav = newAV();
1220 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1221 if (*++s != ':') {
3280af22 1222 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1223#ifdef VMS
6b88bc9c 1224 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1225#else
3280af22 1226 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1227#endif
3280af22 1228 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1229# ifdef DEBUGGING
3280af22 1230 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1231# endif
6224f72b 1232# ifdef MULTIPLICITY
8f872242 1233 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1234# endif
4d1ff10f
AB
1235# ifdef USE_5005THREADS
1236 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1237# endif
ac5e8965
JH
1238# ifdef USE_ITHREADS
1239 sv_catpv(PL_Sv," USE_ITHREADS");
1240# endif
10cc9d2a
JH
1241# ifdef USE_64_BIT_INT
1242 sv_catpv(PL_Sv," USE_64_BIT_INT");
1243# endif
1244# ifdef USE_64_BIT_ALL
1245 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1246# endif
1247# ifdef USE_LONG_DOUBLE
1248 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1249# endif
53430762
JH
1250# ifdef USE_LARGE_FILES
1251 sv_catpv(PL_Sv," USE_LARGE_FILES");
1252# endif
ac5e8965
JH
1253# ifdef USE_SOCKS
1254 sv_catpv(PL_Sv," USE_SOCKS");
1255# endif
b363f7ed
GS
1256# ifdef PERL_IMPLICIT_CONTEXT
1257 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1258# endif
1259# ifdef PERL_IMPLICIT_SYS
1260 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1261# endif
3280af22 1262 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1263
6224f72b
GS
1264#if defined(LOCAL_PATCH_COUNT)
1265 if (LOCAL_PATCH_COUNT > 0) {
1266 int i;
3280af22 1267 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1268 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1269 if (PL_localpatches[i])
cea2e8a9 1270 Perl_sv_catpvf(aTHX_ PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]);
6224f72b
GS
1271 }
1272 }
1273#endif
cea2e8a9 1274 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1275#ifdef __DATE__
1276# ifdef __TIME__
cea2e8a9 1277 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1278# else
cea2e8a9 1279 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1280# endif
1281#endif
3280af22 1282 sv_catpv(PL_Sv, "; \
6224f72b 1283$\"=\"\\n \"; \
69fcd688
JH
1284@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1285#ifdef __CYGWIN__
1286 sv_catpv(PL_Sv,"\
1287push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1288#endif
1289 sv_catpv(PL_Sv, "\
6224f72b
GS
1290print \" \\%ENV:\\n @env\\n\" if @env; \
1291print \" \\@INC:\\n @INC\\n\";");
1292 }
1293 else {
3280af22
NIS
1294 PL_Sv = newSVpv("config_vars(qw(",0);
1295 sv_catpv(PL_Sv, ++s);
1296 sv_catpv(PL_Sv, "))");
6224f72b
GS
1297 s += strlen(s);
1298 }
3280af22 1299 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1300 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1301 goto reswitch;
1302 case 'x':
3280af22 1303 PL_doextract = TRUE;
6224f72b
GS
1304 s++;
1305 if (*s)
f4c556ac 1306 cddir = s;
6224f72b
GS
1307 break;
1308 case 0:
1309 break;
1310 case '-':
1311 if (!*++s || isSPACE(*s)) {
1312 argc--,argv++;
1313 goto switch_end;
1314 }
1315 /* catch use of gnu style long options */
1316 if (strEQ(s, "version")) {
1317 s = "v";
1318 goto reswitch;
1319 }
1320 if (strEQ(s, "help")) {
1321 s = "h";
1322 goto reswitch;
1323 }
1324 s--;
1325 /* FALL THROUGH */
1326 default:
cea2e8a9 1327 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1328 }
1329 }
6224f72b 1330 switch_end:
7f9e821f 1331 sv_setsv(get_sv("/", TRUE), PL_rs);
54310121 1332
f675dbe5
CB
1333 if (
1334#ifndef SECURE_INTERNAL_GETENV
1335 !PL_tainting &&
1336#endif
cf756827 1337 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1338 {
cf756827 1339 char *popt = s;
74288ac8
GS
1340 while (isSPACE(*s))
1341 s++;
317ea90d 1342 if (*s == '-' && *(s+1) == 'T') {
22f7c9c9 1343 CHECK_MALLOC_TOO_LATE_FOR('T');
74288ac8 1344 PL_tainting = TRUE;
317ea90d
MS
1345 PL_taint_warn = FALSE;
1346 }
74288ac8 1347 else {
cf756827 1348 char *popt_copy = Nullch;
74288ac8 1349 while (s && *s) {
4ea8f8fb 1350 char *d;
74288ac8
GS
1351 while (isSPACE(*s))
1352 s++;
1353 if (*s == '-') {
1354 s++;
1355 if (isSPACE(*s))
1356 continue;
1357 }
4ea8f8fb 1358 d = s;
74288ac8
GS
1359 if (!*s)
1360 break;
06492da6 1361 if (!strchr("DIMUdmtwA", *s))
cea2e8a9 1362 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1363 while (++s && *s) {
1364 if (isSPACE(*s)) {
cf756827
GS
1365 if (!popt_copy) {
1366 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1367 s = popt_copy + (s - popt);
1368 d = popt_copy + (d - popt);
1369 }
4ea8f8fb
MS
1370 *s++ = '\0';
1371 break;
1372 }
1373 }
1c4db469 1374 if (*d == 't') {
317ea90d
MS
1375 if( !PL_tainting ) {
1376 PL_taint_warn = TRUE;
1377 PL_tainting = TRUE;
1378 }
1c4db469
RGS
1379 } else {
1380 moreswitches(d);
1381 }
6224f72b 1382 }
6224f72b
GS
1383 }
1384 }
a0d0e21e 1385
317ea90d
MS
1386 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1387 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1388 }
1389
6224f72b
GS
1390 if (!scriptname)
1391 scriptname = argv[0];
3280af22 1392 if (PL_e_script) {
6224f72b
GS
1393 argc++,argv--;
1394 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1395 }
1396 else if (scriptname == Nullch) {
1397#ifdef MSDOS
1398 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1399 moreswitches("h");
1400#endif
1401 scriptname = "-";
1402 }
1403
1404 init_perllib();
1405
1406 open_script(scriptname,dosearch,sv,&fdscript);
1407
1408 validate_suid(validarg, scriptname,fdscript);
1409
64ca3a65 1410#ifndef PERL_MICRO
0b5b802d
GS
1411#if defined(SIGCHLD) || defined(SIGCLD)
1412 {
1413#ifndef SIGCHLD
1414# define SIGCHLD SIGCLD
1415#endif
1416 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1417 if (sigstate == SIG_IGN) {
1418 if (ckWARN(WARN_SIGNAL))
9014280d 1419 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
0b5b802d
GS
1420 "Can't ignore signal CHLD, forcing to default");
1421 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1422 }
1423 }
1424#endif
64ca3a65 1425#endif
0b5b802d 1426
bf4acbe4
GS
1427#ifdef MACOS_TRADITIONAL
1428 if (PL_doextract || gMacPerl_AlwaysExtract) {
1429#else
f4c556ac 1430 if (PL_doextract) {
bf4acbe4 1431#endif
6224f72b 1432 find_beginning();
f4c556ac
GS
1433 if (cddir && PerlDir_chdir(cddir) < 0)
1434 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1435
1436 }
6224f72b 1437
3280af22
NIS
1438 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1439 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1440 CvUNIQUE_on(PL_compcv);
1441
dd2155a4 1442 CvPADLIST(PL_compcv) = pad_new(0);
4d1ff10f 1443#ifdef USE_5005THREADS
533c011a
NIS
1444 CvOWNER(PL_compcv) = 0;
1445 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1446 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1447#endif /* USE_5005THREADS */
6224f72b 1448
0c4f7ff0 1449 boot_core_PerlIO();
6224f72b 1450 boot_core_UNIVERSAL();
9a34ef1d 1451#ifndef PERL_MICRO
09bef843 1452 boot_core_xsutils();
9a34ef1d 1453#endif
6224f72b
GS
1454
1455 if (xsinit)
acfe0abc 1456 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1457#ifndef PERL_MICRO
ed79a026 1458#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1459 init_os_extras();
6224f72b 1460#endif
64ca3a65 1461#endif
6224f72b 1462
29209bc5 1463#ifdef USE_SOCKS
1b9c9cf5
DH
1464# ifdef HAS_SOCKS5_INIT
1465 socks5_init(argv[0]);
1466# else
29209bc5 1467 SOCKSinit(argv[0]);
1b9c9cf5 1468# endif
ac27b0f5 1469#endif
29209bc5 1470
6224f72b
GS
1471 init_predump_symbols();
1472 /* init_postdump_symbols not currently designed to be called */
1473 /* more than once (ENV isn't cleared first, for example) */
1474 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1475 if (!PL_do_undump)
6224f72b
GS
1476 init_postdump_symbols(argc,argv,env);
1477
a05d7ebb
JH
1478 /* PL_unicode is turned on by -C or by $ENV{PERL_UNICODE}.
1479 * PL_utf8locale is conditionally turned on by
085a54d9 1480 * locale.c:Perl_init_i18nl10n() if the environment
a05d7ebb 1481 * look like the user wants to use UTF-8. */
06e66572
JH
1482 if (PL_unicode) {
1483 /* Requires init_predump_symbols(). */
a05d7ebb 1484 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
06e66572
JH
1485 IO* io;
1486 PerlIO* fp;
1487 SV* sv;
1488
a05d7ebb 1489 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
06e66572 1490 * and the default open disciplines. */
a05d7ebb
JH
1491 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
1492 PL_stdingv && (io = GvIO(PL_stdingv)) &&
1493 (fp = IoIFP(io)))
1494 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1495 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
1496 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
1497 (fp = IoOFP(io)))
1498 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1499 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
1500 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
1501 (fp = IoOFP(io)))
1502 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1503 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
1504 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1505 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
1506 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
1507 if (in) {
1508 if (out)
1509 sv_setpvn(sv, ":utf8\0:utf8", 11);
1510 else
1511 sv_setpvn(sv, ":utf8\0", 6);
1512 }
1513 else if (out)
1514 sv_setpvn(sv, "\0:utf8", 6);
1515 SvSETMAGIC(sv);
1516 }
b310b053
JH
1517 }
1518 }
1519
4ffa73a3
JH
1520 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
1521 if (strEQ(s, "unsafe"))
1522 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
1523 else if (strEQ(s, "safe"))
1524 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
1525 else
1526 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
1527 }
1528
6224f72b
GS
1529 init_lexer();
1530
1531 /* now parse the script */
1532
93189314 1533 SETERRNO(0,SS_NORMAL);
3280af22 1534 PL_error_count = 0;
bf4acbe4
GS
1535#ifdef MACOS_TRADITIONAL
1536 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1537 if (PL_minus_c)
1538 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1539 else {
1540 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1541 MacPerl_MPWFileName(PL_origfilename));
1542 }
1543 }
1544#else
3280af22
NIS
1545 if (yyparse() || PL_error_count) {
1546 if (PL_minus_c)
cea2e8a9 1547 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1548 else {
cea2e8a9 1549 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1550 PL_origfilename);
6224f72b
GS
1551 }
1552 }
bf4acbe4 1553#endif
57843af0 1554 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1555 PL_curstash = PL_defstash;
1556 PL_preprocess = FALSE;
1557 if (PL_e_script) {
1558 SvREFCNT_dec(PL_e_script);
1559 PL_e_script = Nullsv;
6224f72b
GS
1560 }
1561
3280af22 1562 if (PL_do_undump)
6224f72b
GS
1563 my_unexec();
1564
57843af0
GS
1565 if (isWARN_ONCE) {
1566 SAVECOPFILE(PL_curcop);
1567 SAVECOPLINE(PL_curcop);
3280af22 1568 gv_check(PL_defstash);
57843af0 1569 }
6224f72b
GS
1570
1571 LEAVE;
1572 FREETMPS;
1573
1574#ifdef MYMALLOC
1575 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1576 dump_mstats("after compilation:");
1577#endif
1578
1579 ENTER;
3280af22 1580 PL_restartop = 0;
312caa8e 1581 return NULL;
6224f72b
GS
1582}
1583
954c1994
GS
1584/*
1585=for apidoc perl_run
1586
1587Tells a Perl interpreter to run. See L<perlembed>.
1588
1589=cut
1590*/
1591
6224f72b 1592int
0cb96387 1593perl_run(pTHXx)
6224f72b 1594{
6224f72b 1595 I32 oldscope;
14dd3ad8 1596 int ret = 0;
db36c5a1 1597 dJMPENV;
4d1ff10f 1598#ifdef USE_5005THREADS
cea2e8a9
GS
1599 dTHX;
1600#endif
6224f72b 1601
3280af22 1602 oldscope = PL_scopestack_ix;
96e176bf
CL
1603#ifdef VMS
1604 VMSISH_HUSHED = 0;
1605#endif
6224f72b 1606
14dd3ad8 1607#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1608 redo_body:
14dd3ad8
GS
1609 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1610#else
1611 JMPENV_PUSH(ret);
1612#endif
6224f72b
GS
1613 switch (ret) {
1614 case 1:
1615 cxstack_ix = -1; /* start context stack again */
312caa8e 1616 goto redo_body;
14dd3ad8
GS
1617 case 0: /* normal completion */
1618#ifndef PERL_FLEXIBLE_EXCEPTIONS
1619 redo_body:
1620 run_body(oldscope);
1621#endif
1622 /* FALL THROUGH */
1623 case 2: /* my_exit() */
3280af22 1624 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1625 LEAVE;
1626 FREETMPS;
3280af22 1627 PL_curstash = PL_defstash;
3a1ee7e8 1628 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
1629 PL_endav && !PL_minus_c)
1630 call_list(oldscope, PL_endav);
6224f72b
GS
1631#ifdef MYMALLOC
1632 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1633 dump_mstats("after execution: ");
1634#endif
14dd3ad8
GS
1635 ret = STATUS_NATIVE_EXPORT;
1636 break;
6224f72b 1637 case 3:
312caa8e
CS
1638 if (PL_restartop) {
1639 POPSTACK_TO(PL_mainstack);
1640 goto redo_body;
6224f72b 1641 }
bf49b057 1642 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1643 FREETMPS;
14dd3ad8
GS
1644 ret = 1;
1645 break;
6224f72b
GS
1646 }
1647
14dd3ad8
GS
1648 JMPENV_POP;
1649 return ret;
312caa8e
CS
1650}
1651
14dd3ad8 1652#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1653STATIC void *
14dd3ad8 1654S_vrun_body(pTHX_ va_list args)
312caa8e 1655{
312caa8e
CS
1656 I32 oldscope = va_arg(args, I32);
1657
14dd3ad8
GS
1658 return run_body(oldscope);
1659}
1660#endif
1661
1662
1663STATIC void *
1664S_run_body(pTHX_ I32 oldscope)
1665{
6224f72b 1666 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1667 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1668
3280af22 1669 if (!PL_restartop) {
6224f72b
GS
1670 DEBUG_x(dump_all());
1671 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1672 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1673 PTR2UV(thr)));
6224f72b 1674
3280af22 1675 if (PL_minus_c) {
bf4acbe4 1676#ifdef MACOS_TRADITIONAL
e69a2255
JH
1677 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
1678 (gMacPerl_ErrorFormat ? "# " : ""),
1679 MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1680#else
bf49b057 1681 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1682#endif
6224f72b
GS
1683 my_exit(0);
1684 }
3280af22 1685 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1686 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1687 if (PL_initav)
1688 call_list(oldscope, PL_initav);
6224f72b
GS
1689 }
1690
1691 /* do it */
1692
3280af22 1693 if (PL_restartop) {
533c011a 1694 PL_op = PL_restartop;
3280af22 1695 PL_restartop = 0;
cea2e8a9 1696 CALLRUNOPS(aTHX);
6224f72b 1697 }
3280af22
NIS
1698 else if (PL_main_start) {
1699 CvDEPTH(PL_main_cv) = 1;
533c011a 1700 PL_op = PL_main_start;
cea2e8a9 1701 CALLRUNOPS(aTHX);
6224f72b
GS
1702 }
1703
f6b3007c
JH
1704 my_exit(0);
1705 /* NOTREACHED */
312caa8e 1706 return NULL;
6224f72b
GS
1707}
1708
954c1994 1709/*
ccfc67b7
JH
1710=head1 SV Manipulation Functions
1711
954c1994
GS
1712=for apidoc p||get_sv
1713
1714Returns the SV of the specified Perl scalar. If C<create> is set and the
1715Perl variable does not exist then it will be created. If C<create> is not
1716set and the variable does not exist then NULL is returned.
1717
1718=cut
1719*/
1720
6224f72b 1721SV*
864dbfa3 1722Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1723{
1724 GV *gv;
4d1ff10f 1725#ifdef USE_5005THREADS
6224f72b
GS
1726 if (name[1] == '\0' && !isALPHA(name[0])) {
1727 PADOFFSET tmp = find_threadsv(name);
411caa50 1728 if (tmp != NOT_IN_PAD)
6224f72b 1729 return THREADSV(tmp);
6224f72b 1730 }
4d1ff10f 1731#endif /* USE_5005THREADS */
6224f72b
GS
1732 gv = gv_fetchpv(name, create, SVt_PV);
1733 if (gv)
1734 return GvSV(gv);
1735 return Nullsv;
1736}
1737
954c1994 1738/*
ccfc67b7
JH
1739=head1 Array Manipulation Functions
1740
954c1994
GS
1741=for apidoc p||get_av
1742
1743Returns the AV of the specified Perl array. If C<create> is set and the
1744Perl variable does not exist then it will be created. If C<create> is not
1745set and the variable does not exist then NULL is returned.
1746
1747=cut
1748*/
1749
6224f72b 1750AV*
864dbfa3 1751Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1752{
1753 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1754 if (create)
1755 return GvAVn(gv);
1756 if (gv)
1757 return GvAV(gv);
1758 return Nullav;
1759}
1760
954c1994 1761/*
ccfc67b7
JH
1762=head1 Hash Manipulation Functions
1763
954c1994
GS
1764=for apidoc p||get_hv
1765
1766Returns the HV of the specified Perl hash. If C<create> is set and the
1767Perl variable does not exist then it will be created. If C<create> is not
1768set and the variable does not exist then NULL is returned.
1769
1770=cut
1771*/
1772
6224f72b 1773HV*
864dbfa3 1774Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1775{
a0d0e21e
LW
1776 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1777 if (create)
1778 return GvHVn(gv);
1779 if (gv)
1780 return GvHV(gv);
1781 return Nullhv;
1782}
1783
954c1994 1784/*
ccfc67b7
JH
1785=head1 CV Manipulation Functions
1786
954c1994
GS
1787=for apidoc p||get_cv
1788
1789Returns the CV of the specified Perl subroutine. If C<create> is set and
1790the Perl subroutine does not exist then it will be declared (which has the
1791same effect as saying C<sub name;>). If C<create> is not set and the
1792subroutine does not exist then NULL is returned.
1793
1794=cut
1795*/
1796
a0d0e21e 1797CV*
864dbfa3 1798Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
1799{
1800 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1801 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
1802 /* XXX this is probably not what they think they're getting.
1803 * It has the same effect as "sub name;", i.e. just a forward
1804 * declaration! */
8ebc5c01 1805 if (create && !GvCVu(gv))
774d564b 1806 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1807 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1808 Nullop,
a0d0e21e
LW
1809 Nullop);
1810 if (gv)
8ebc5c01 1811 return GvCVu(gv);
a0d0e21e
LW
1812 return Nullcv;
1813}
1814
79072805
LW
1815/* Be sure to refetch the stack pointer after calling these routines. */
1816
954c1994 1817/*
ccfc67b7
JH
1818
1819=head1 Callback Functions
1820
954c1994
GS
1821=for apidoc p||call_argv
1822
1823Performs a callback to the specified Perl sub. See L<perlcall>.
1824
1825=cut
1826*/
1827
a0d0e21e 1828I32
864dbfa3 1829Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1830
8ac85365
NIS
1831 /* See G_* flags in cop.h */
1832 /* null terminated arg list */
8990e307 1833{
a0d0e21e 1834 dSP;
8990e307 1835
924508f0 1836 PUSHMARK(SP);
a0d0e21e 1837 if (argv) {
8990e307 1838 while (*argv) {
a0d0e21e 1839 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
1840 argv++;
1841 }
a0d0e21e 1842 PUTBACK;
8990e307 1843 }
864dbfa3 1844 return call_pv(sub_name, flags);
8990e307
LW
1845}
1846
954c1994
GS
1847/*
1848=for apidoc p||call_pv
1849
1850Performs a callback to the specified Perl sub. See L<perlcall>.
1851
1852=cut
1853*/
1854
a0d0e21e 1855I32
864dbfa3 1856Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
1857 /* name of the subroutine */
1858 /* See G_* flags in cop.h */
a0d0e21e 1859{
864dbfa3 1860 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
1861}
1862
954c1994
GS
1863/*
1864=for apidoc p||call_method
1865
1866Performs a callback to the specified Perl method. The blessed object must
1867be on the stack. See L<perlcall>.
1868
1869=cut
1870*/
1871
a0d0e21e 1872I32
864dbfa3 1873Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
1874 /* name of the subroutine */
1875 /* See G_* flags in cop.h */
a0d0e21e 1876{
968b3946 1877 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
1878}
1879
1880/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
1881/*
1882=for apidoc p||call_sv
1883
1884Performs a callback to the Perl sub whose name is in the SV. See
1885L<perlcall>.
1886
1887=cut
1888*/
1889
a0d0e21e 1890I32
864dbfa3 1891Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1892 /* See G_* flags in cop.h */
a0d0e21e 1893{
924508f0 1894 dSP;
a0d0e21e 1895 LOGOP myop; /* fake syntax tree node */
968b3946 1896 UNOP method_op;
aa689395 1897 I32 oldmark;
13689cfe 1898 volatile I32 retval = 0;
a0d0e21e 1899 I32 oldscope;
54310121 1900 bool oldcatch = CATCH_GET;
6224f72b 1901 int ret;
533c011a 1902 OP* oldop = PL_op;
db36c5a1 1903 dJMPENV;
1e422769 1904
a0d0e21e
LW
1905 if (flags & G_DISCARD) {
1906 ENTER;
1907 SAVETMPS;
1908 }
1909
aa689395 1910 Zero(&myop, 1, LOGOP);
54310121 1911 myop.op_next = Nullop;
f51d4af5 1912 if (!(flags & G_NOARGS))
aa689395 1913 myop.op_flags |= OPf_STACKED;
54310121
PP
1914 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1915 (flags & G_ARRAY) ? OPf_WANT_LIST :
1916 OPf_WANT_SCALAR);
462e5cf6 1917 SAVEOP();
533c011a 1918 PL_op = (OP*)&myop;
aa689395 1919
3280af22
NIS
1920 EXTEND(PL_stack_sp, 1);
1921 *++PL_stack_sp = sv;
aa689395 1922 oldmark = TOPMARK;
3280af22 1923 oldscope = PL_scopestack_ix;
a0d0e21e 1924
3280af22 1925 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 1926 /* Handle first BEGIN of -d. */
3280af22 1927 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
1928 /* Try harder, since this may have been a sighandler, thus
1929 * curstash may be meaningless. */
3280af22 1930 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 1931 && !(flags & G_NODEBUG))
533c011a 1932 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1933
968b3946
GS
1934 if (flags & G_METHOD) {
1935 Zero(&method_op, 1, UNOP);
1936 method_op.op_next = PL_op;
1937 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
1938 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 1939 PL_op = (OP*)&method_op;
968b3946
GS
1940 }
1941
312caa8e 1942 if (!(flags & G_EVAL)) {
0cdb2077 1943 CATCH_SET(TRUE);
14dd3ad8 1944 call_body((OP*)&myop, FALSE);
312caa8e 1945 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 1946 CATCH_SET(oldcatch);
312caa8e
CS
1947 }
1948 else {
d78bda3d 1949 myop.op_other = (OP*)&myop;
3280af22 1950 PL_markstack_ptr--;
4633a7c4
LW
1951 /* we're trying to emulate pp_entertry() here */
1952 {
c09156bb 1953 register PERL_CONTEXT *cx;
54310121 1954 I32 gimme = GIMME_V;
ac27b0f5 1955
4633a7c4
LW
1956 ENTER;
1957 SAVETMPS;
ac27b0f5 1958
968b3946 1959 push_return(Nullop);
1d76a5c3 1960 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 1961 PUSHEVAL(cx, 0, 0);
533c011a 1962 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 1963
faef0170 1964 PL_in_eval = EVAL_INEVAL;
4633a7c4 1965 if (flags & G_KEEPERR)
faef0170 1966 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 1967 else
38a03e6e 1968 sv_setpv(ERRSV,"");
4633a7c4 1969 }
3280af22 1970 PL_markstack_ptr++;
a0d0e21e 1971
14dd3ad8
GS
1972#ifdef PERL_FLEXIBLE_EXCEPTIONS
1973 redo_body:
1974 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 1975 (OP*)&myop, FALSE);
14dd3ad8
GS
1976#else
1977 JMPENV_PUSH(ret);
1978#endif
6224f72b
GS
1979 switch (ret) {
1980 case 0:
14dd3ad8
GS
1981#ifndef PERL_FLEXIBLE_EXCEPTIONS
1982 redo_body:
1983 call_body((OP*)&myop, FALSE);
1984#endif
312caa8e
CS
1985 retval = PL_stack_sp - (PL_stack_base + oldmark);
1986 if (!(flags & G_KEEPERR))
1987 sv_setpv(ERRSV,"");
a0d0e21e 1988 break;
6224f72b 1989 case 1:
f86702cc 1990 STATUS_ALL_FAILURE;
a0d0e21e 1991 /* FALL THROUGH */
6224f72b 1992 case 2:
a0d0e21e 1993 /* my_exit() was called */
3280af22 1994 PL_curstash = PL_defstash;
a0d0e21e 1995 FREETMPS;
14dd3ad8 1996 JMPENV_POP;
cc3604b1 1997 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 1998 Perl_croak(aTHX_ "Callback called exit");
f86702cc 1999 my_exit_jump();
a0d0e21e 2000 /* NOTREACHED */
6224f72b 2001 case 3:
3280af22 2002 if (PL_restartop) {
533c011a 2003 PL_op = PL_restartop;
3280af22 2004 PL_restartop = 0;
312caa8e 2005 goto redo_body;
a0d0e21e 2006 }
3280af22 2007 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2008 if (flags & G_ARRAY)
2009 retval = 0;
2010 else {
2011 retval = 1;
3280af22 2012 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 2013 }
312caa8e 2014 break;
a0d0e21e 2015 }
a0d0e21e 2016
3280af22 2017 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
2018 SV **newsp;
2019 PMOP *newpm;
2020 I32 gimme;
c09156bb 2021 register PERL_CONTEXT *cx;
a0a2876f
LW
2022 I32 optype;
2023
2024 POPBLOCK(cx,newpm);
2025 POPEVAL(cx);
2026 pop_return();
3280af22 2027 PL_curpm = newpm;
a0a2876f 2028 LEAVE;
a0d0e21e 2029 }
14dd3ad8 2030 JMPENV_POP;
a0d0e21e 2031 }
1e422769 2032
a0d0e21e 2033 if (flags & G_DISCARD) {
3280af22 2034 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2035 retval = 0;
2036 FREETMPS;
2037 LEAVE;
2038 }
533c011a 2039 PL_op = oldop;
a0d0e21e
LW
2040 return retval;
2041}
2042
14dd3ad8 2043#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2044STATIC void *
14dd3ad8 2045S_vcall_body(pTHX_ va_list args)
312caa8e
CS
2046{
2047 OP *myop = va_arg(args, OP*);
2048 int is_eval = va_arg(args, int);
2049
14dd3ad8 2050 call_body(myop, is_eval);
312caa8e
CS
2051 return NULL;
2052}
14dd3ad8 2053#endif
312caa8e
CS
2054
2055STATIC void
14dd3ad8 2056S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 2057{
312caa8e
CS
2058 if (PL_op == myop) {
2059 if (is_eval)
f807eda9 2060 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 2061 else
f807eda9 2062 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
2063 }
2064 if (PL_op)
cea2e8a9 2065 CALLRUNOPS(aTHX);
312caa8e
CS
2066}
2067
6e72f9df 2068/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 2069
954c1994
GS
2070/*
2071=for apidoc p||eval_sv
2072
2073Tells Perl to C<eval> the string in the SV.
2074
2075=cut
2076*/
2077
a0d0e21e 2078I32
864dbfa3 2079Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 2080
8ac85365 2081 /* See G_* flags in cop.h */
a0d0e21e 2082{
924508f0 2083 dSP;
a0d0e21e 2084 UNOP myop; /* fake syntax tree node */
8fa7f367 2085 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 2086 volatile I32 retval = 0;
4633a7c4 2087 I32 oldscope;
6224f72b 2088 int ret;
533c011a 2089 OP* oldop = PL_op;
db36c5a1 2090 dJMPENV;
84902520 2091
4633a7c4
LW
2092 if (flags & G_DISCARD) {
2093 ENTER;
2094 SAVETMPS;
2095 }
2096
462e5cf6 2097 SAVEOP();
533c011a
NIS
2098 PL_op = (OP*)&myop;
2099 Zero(PL_op, 1, UNOP);
3280af22
NIS
2100 EXTEND(PL_stack_sp, 1);
2101 *++PL_stack_sp = sv;
2102 oldscope = PL_scopestack_ix;
79072805 2103
4633a7c4
LW
2104 if (!(flags & G_NOARGS))
2105 myop.op_flags = OPf_STACKED;
79072805 2106 myop.op_next = Nullop;
6e72f9df 2107 myop.op_type = OP_ENTEREVAL;
54310121
PP
2108 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2109 (flags & G_ARRAY) ? OPf_WANT_LIST :
2110 OPf_WANT_SCALAR);
6e72f9df
PP
2111 if (flags & G_KEEPERR)
2112 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2113
14dd3ad8 2114#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2115 redo_body:
14dd3ad8 2116 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2117 (OP*)&myop, TRUE);
14dd3ad8
GS
2118#else
2119 JMPENV_PUSH(ret);
2120#endif
6224f72b
GS
2121 switch (ret) {
2122 case 0:
14dd3ad8
GS
2123#ifndef PERL_FLEXIBLE_EXCEPTIONS
2124 redo_body:
2125 call_body((OP*)&myop,TRUE);
2126#endif
312caa8e
CS
2127 retval = PL_stack_sp - (PL_stack_base + oldmark);
2128 if (!(flags & G_KEEPERR))
2129 sv_setpv(ERRSV,"");
4633a7c4 2130 break;
6224f72b 2131 case 1:
f86702cc 2132 STATUS_ALL_FAILURE;
4633a7c4 2133 /* FALL THROUGH */
6224f72b 2134 case 2:
4633a7c4 2135 /* my_exit() was called */
3280af22 2136 PL_curstash = PL_defstash;
4633a7c4 2137 FREETMPS;
14dd3ad8 2138 JMPENV_POP;
cc3604b1 2139 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2140 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2141 my_exit_jump();
4633a7c4 2142 /* NOTREACHED */
6224f72b 2143 case 3:
3280af22 2144 if (PL_restartop) {
533c011a 2145 PL_op = PL_restartop;
3280af22 2146 PL_restartop = 0;
312caa8e 2147 goto redo_body;
4633a7c4 2148 }
3280af22 2149 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2150 if (flags & G_ARRAY)
2151 retval = 0;
2152 else {
2153 retval = 1;
3280af22 2154 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2155 }
312caa8e 2156 break;
4633a7c4
LW
2157 }
2158
14dd3ad8 2159 JMPENV_POP;
4633a7c4 2160 if (flags & G_DISCARD) {
3280af22 2161 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2162 retval = 0;
2163 FREETMPS;
2164 LEAVE;
2165 }
533c011a 2166 PL_op = oldop;
4633a7c4
LW
2167 return retval;
2168}
2169
954c1994
GS
2170/*
2171=for apidoc p||eval_pv
2172
2173Tells Perl to C<eval> the given string and return an SV* result.
2174
2175=cut
2176*/
2177
137443ea 2178SV*
864dbfa3 2179Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2180{
2181 dSP;
2182 SV* sv = newSVpv(p, 0);
2183
864dbfa3 2184 eval_sv(sv, G_SCALAR);
137443ea
PP
2185 SvREFCNT_dec(sv);
2186
2187 SPAGAIN;
2188 sv = POPs;
2189 PUTBACK;
2190
2d8e6c8d
GS
2191 if (croak_on_error && SvTRUE(ERRSV)) {
2192 STRLEN n_a;
cea2e8a9 2193 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2194 }
137443ea
PP
2195
2196 return sv;
2197}
2198
4633a7c4
LW
2199/* Require a module. */
2200
954c1994 2201/*
ccfc67b7
JH
2202=head1 Embedding Functions
2203
954c1994
GS
2204=for apidoc p||require_pv
2205
7d3fb230
BS
2206Tells Perl to C<require> the file named by the string argument. It is
2207analogous to the Perl code C<eval "require '$file'">. It's even
2307c6d0 2208implemented that way; consider using load_module instead.
954c1994 2209
7d3fb230 2210=cut */
954c1994 2211
4633a7c4 2212void
864dbfa3 2213Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2214{
d3acc0f7
JP
2215 SV* sv;
2216 dSP;
e788e7d3 2217 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2218 PUTBACK;
2219 sv = sv_newmortal();
4633a7c4
LW
2220 sv_setpv(sv, "require '");
2221 sv_catpv(sv, pv);
2222 sv_catpv(sv, "'");
864dbfa3 2223 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2224 SPAGAIN;
2225 POPSTACK;
79072805
LW
2226}
2227
79072805 2228void
864dbfa3 2229Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW
2230{
2231 register GV *gv;
2232
155aba94 2233 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2234 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2235}
2236
76e3520e 2237STATIC void
cea2e8a9 2238S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2239{
ab821d7f 2240 /* This message really ought to be max 23 lines.
75c72d73 2241 * Removed -h because the user already knows that option. Others? */
fb73857a 2242
76e3520e 2243 static char *usage_msg[] = {
fb73857a
PP
2244"-0[octal] specify record separator (\\0, if no argument)",
2245"-a autosplit mode with -n or -p (splits $_ into @F)",
46487f74 2246"-C enable native wide character system interfaces",
1950ee41 2247"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2248"-d[:debugger] run program under debugger",
2249"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2250"-e 'command' one line of program (several -e's allowed, omit programfile)",
2251"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2252"-i[extension] edit <> files in place (makes backup if extension supplied)",
2253"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2254"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2255"-[mM][-]module execute `use/no module...' before executing program",
2256"-n assume 'while (<>) { ... }' loop around program",
2257"-p assume loop like -n but print line also, like sed",
2258"-P run program through C preprocessor before compilation",
2259"-s enable rudimentary parsing for switches after programfile",
2260"-S look for programfile using PATH environment variable",
2261"-T enable tainting checks",
9cbc33e8 2262"-t enable tainting warnings",
aac3bd0d 2263"-u dump core after parsing program",
fb73857a 2264"-U allow unsafe operations",
aac3bd0d
GS
2265"-v print version, subversion (includes VERY IMPORTANT perl info)",
2266"-V[:variable] print configuration summary (or a single Config.pm variable)",
2267"-w enable many useful warnings (RECOMMENDED)",
3c0facb2
GS
2268"-W enable all warnings",
2269"-X disable all warnings",
fb73857a
PP
2270"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2271"\n",
2272NULL
2273};
76e3520e 2274 char **p = usage_msg;
fb73857a 2275
b0e47665
GS
2276 PerlIO_printf(PerlIO_stdout(),
2277 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2278 name);
fb73857a 2279 while (*p)
b0e47665 2280 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2281}
2282
b4ab917c
DM
2283/* convert a string of -D options (or digits) into an int.
2284 * sets *s to point to the char after the options */
2285
2286#ifdef DEBUGGING
2287int
2288Perl_get_debug_opts(pTHX_ char **s)
2289{
2290 int i = 0;
2291 if (isALPHA(**s)) {
2292 /* if adding extra options, remember to update DEBUG_MASK */
2293 static char debopts[] = "psltocPmfrxu HXDSTRJvC";
2294
2295 for (; isALNUM(**s); (*s)++) {
2296 char *d = strchr(debopts,**s);
2297 if (d)
2298 i |= 1 << (d - debopts);
2299 else if (ckWARN_d(WARN_DEBUGGING))
2300 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2301 "invalid option -D%c\n", **s);
2302 }
2303 }
2304 else {
2305 i = atoi(*s);
2306 for (; isALNUM(**s); (*s)++) ;
2307 }
2308# ifdef EBCDIC
2309 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2310 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2311 "-Dp not implemented on this platform\n");
2312# endif
2313 return i;
2314}
2315#endif
2316
79072805
LW
2317/* This routine handles any switches that can be given during run */
2318
2319char *
864dbfa3 2320Perl_moreswitches(pTHX_ char *s)
79072805 2321{
ba210ebe 2322 STRLEN numlen;
84c133a0 2323 UV rschar;
79072805
LW
2324
2325 switch (*s) {
2326 case '0':
a863c7d1 2327 {
f2095865
JH
2328 I32 flags = 0;
2329
2330 SvREFCNT_dec(PL_rs);
2331 if (s[1] == 'x' && s[2]) {
2332 char *e;
2333 U8 *tmps;
2334
2335 for (s += 2, e = s; *e; e++);
2336 numlen = e - s;
2337 flags = PERL_SCAN_SILENT_ILLDIGIT;
2338 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2339 if (s + numlen < e) {
2340 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2341 numlen = 0;
2342 s--;
2343 }
2344 PL_rs = newSVpvn("", 0);
c5661c80 2345 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
f2095865
JH
2346 tmps = (U8*)SvPVX(PL_rs);
2347 uvchr_to_utf8(tmps, rschar);
2348 SvCUR_set(PL_rs, UNISKIP(rschar));
2349 SvUTF8_on(PL_rs);
2350 }
2351 else {
2352 numlen = 4;
2353 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2354 if (rschar & ~((U8)~0))
2355 PL_rs = &PL_sv_undef;
2356 else if (!rschar && numlen >= 2)
2357 PL_rs = newSVpvn("", 0);
2358 else {
2359 char ch = (char)rschar;
2360 PL_rs = newSVpvn(&ch, 1);
2361 }
2362 }
2363 return s + numlen;
a863c7d1 2364 }
46487f74 2365 case 'C':
a05d7ebb
JH
2366 s++;
2367 PL_unicode = parse_unicode_opts(&s);
46487f74 2368 return s;
2304df62 2369 case 'F':
3280af22 2370 PL_minus_F = TRUE;
ebce5377
RGS
2371 PL_splitstr = ++s;
2372 while (*s && !isSPACE(*s)) ++s;
2373 *s = '\0';
2374 PL_splitstr = savepv(PL_splitstr);
2304df62 2375 return s;
79072805 2376 case 'a':
3280af22 2377 PL_minus_a = TRUE;
79072805
LW
2378 s++;
2379 return s;
2380 case 'c':
3280af22 2381 PL_minus_c = TRUE;
79072805
LW
2382 s++;
2383 return s;
2384 case 'd':
bbce6d69 2385 forbid_setid("-d");
4633a7c4 2386 s++;
70c94a19
RR
2387 /* The following permits -d:Mod to accepts arguments following an =
2388 in the fashion that -MSome::Mod does. */
2389 if (*s == ':' || *s == '=') {
2390 char *start;
2391 SV *sv;
2392 sv = newSVpv("use Devel::", 0);
2393 start = ++s;
2394 /* We now allow -d:Module=Foo,Bar */
2395 while(isALNUM(*s) || *s==':') ++s;
2396 if (*s != '=')
2397 sv_catpv(sv, start);
2398 else {
2399 sv_catpvn(sv, start, s-start);
2400 sv_catpv(sv, " split(/,/,q{");
2401 sv_catpv(sv, ++s);
2402 sv_catpv(sv, "})");
2403 }
4633a7c4 2404 s += strlen(s);
70c94a19 2405 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2406 }
ed094faf 2407 if (!PL_perldb) {
3280af22 2408 PL_perldb = PERLDB_ALL;
a0d0e21e 2409 init_debugger();
ed094faf 2410 }
79072805
LW
2411 return s;
2412 case 'D':
0453d815 2413 {
79072805 2414#ifdef DEBUGGING
bbce6d69 2415 forbid_setid("-D");
b4ab917c
DM
2416 s++;
2417 PL_debug = get_debug_opts(&s) | DEBUG_TOP_FLAG;
12a43e32 2418#else /* !DEBUGGING */
0453d815 2419 if (ckWARN_d(WARN_DEBUGGING))
9014280d 2420 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
0453d815 2421 "Recompile perl with -DDEBUGGING to use -D switch\n");
a0d0e21e 2422 for (s++; isALNUM(*s); s++) ;
79072805
LW
2423#endif
2424 /*SUPPRESS 530*/
2425 return s;
0453d815 2426 }
4633a7c4 2427 case 'h':
ac27b0f5 2428 usage(PL_origargv[0]);
7ca617d0 2429 my_exit(0);
79072805 2430 case 'i':
3280af22
NIS
2431 if (PL_inplace)
2432 Safefree(PL_inplace);
c030f24b
GH
2433#if defined(__CYGWIN__) /* do backup extension automagically */
2434 if (*(s+1) == '\0') {
2435 PL_inplace = savepv(".bak");
2436 return s+1;
2437 }
2438#endif /* __CYGWIN__ */
3280af22 2439 PL_inplace = savepv(s+1);
79072805 2440 /*SUPPRESS 530*/
3280af22 2441 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2442 if (*s) {
fb73857a 2443 *s++ = '\0';
7b8d334a
GS
2444 if (*s == '-') /* Additional switches on #! line. */
2445 s++;
2446 }
fb73857a 2447 return s;
4e49a025 2448 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2449 forbid_setid("-I");
fb73857a
PP
2450 ++s;
2451 while (*s && isSPACE(*s))
2452 ++s;
2453 if (*s) {
774d564b 2454 char *e, *p;
0df16ed7
GS
2455 p = s;
2456 /* ignore trailing spaces (possibly followed by other switches) */
2457 do {
2458 for (e = p; *e && !isSPACE(*e); e++) ;
2459 p = e;
2460 while (isSPACE(*p))
2461 p++;
2462 } while (*p && *p != '-');
2463 e = savepvn(s, e-s);
574c798a 2464 incpush(e, TRUE, TRUE, FALSE);
0df16ed7
GS
2465 Safefree(e);
2466 s = p;
2467 if (*s == '-')
2468 s++;
79072805
LW
2469 }
2470 else
a67e862a 2471 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2472 return s;
79072805 2473 case 'l':
3280af22 2474 PL_minus_l = TRUE;
79072805 2475 s++;
7889fe52
NIS
2476 if (PL_ors_sv) {
2477 SvREFCNT_dec(PL_ors_sv);
2478 PL_ors_sv = Nullsv;
2479 }
79072805 2480 if (isDIGIT(*s)) {
53305cf1 2481 I32 flags = 0;
7889fe52 2482 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2483 numlen = 3 + (*s == '0');
2484 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2485 s += numlen;
2486 }
2487 else {
8bfdd7d9 2488 if (RsPARA(PL_rs)) {
7889fe52
NIS
2489 PL_ors_sv = newSVpvn("\n\n",2);
2490 }
2491 else {
8bfdd7d9 2492 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2493 }
79072805
LW
2494 }
2495 return s;
06492da6
SF
2496 case 'A':
2497 forbid_setid("-A");
930366bd
RGS
2498 if (!PL_preambleav)
2499 PL_preambleav = newAV();
06492da6 2500 if (*++s) {
930366bd 2501 SV *sv = newSVpvn("use assertions::activate split(/,/,q{",37);
06492da6
SF
2502 sv_catpv(sv,s);
2503 sv_catpv(sv,"})");
2504 s+=strlen(s);
06492da6
SF
2505 av_push(PL_preambleav, sv);
2506 }
2507 else
930366bd 2508 av_push(PL_preambleav, newSVpvn("use assertions::activate",24));
06492da6 2509 return s;
1a30305b 2510 case 'M':
bbce6d69 2511 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2512 /* FALL THROUGH */
2513 case 'm':
bbce6d69 2514 forbid_setid("-m"); /* XXX ? */
1a30305b 2515 if (*++s) {
a5f75d66 2516 char *start;
11343788 2517 SV *sv;
a5f75d66
AD
2518 char *use = "use ";
2519 /* -M-foo == 'no foo' */
2520 if (*s == '-') { use = "no "; ++s; }
11343788 2521 sv = newSVpv(use,0);
a5f75d66 2522 start = s;
1a30305b 2523 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2524 while(isALNUM(*s) || *s==':') ++s;
2525 if (*s != '=') {
11343788 2526 sv_catpv(sv, start);
c07a80fd
PP
2527 if (*(start-1) == 'm') {
2528 if (*s != '\0')
cea2e8a9 2529 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2530 sv_catpv( sv, " ()");
c07a80fd
PP
2531 }
2532 } else {
6df41af2 2533 if (s == start)
be98fb35
GS
2534 Perl_croak(aTHX_ "Module name required with -%c option",
2535 s[-1]);
11343788
MB
2536 sv_catpvn(sv, start, s-start);
2537 sv_catpv(sv, " split(/,/,q{");
2538 sv_catpv(sv, ++s);
2539 sv_catpv(sv, "})");
c07a80fd 2540 }
1a30305b 2541 s += strlen(s);
5c831c24 2542 if (!PL_preambleav)
3280af22
NIS
2543 PL_preambleav = newAV();
2544 av_push(PL_preambleav, sv);
1a30305b
PP
2545 }
2546 else
cea2e8a9 2547 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
1a30305b 2548 return s;
79072805 2549 case 'n':
3280af22 2550 PL_minus_n = TRUE;
79072805
LW
2551 s++;
2552 return s;
2553 case 'p':
3280af22 2554 PL_minus_p = TRUE;
79072805
LW
2555 s++;
2556 return s;
2557 case 's':
bbce6d69 2558 forbid_setid("-s");
3280af22 2559 PL_doswitches = TRUE;
79072805
LW
2560 s++;
2561 return s;
6537fe72
MS
2562 case 't':
2563 if (!PL_tainting)
22f7c9c9 2564 TOO_LATE_FOR('t');
6537fe72
MS
2565 s++;
2566 return s;
463ee0b2 2567 case 'T':
3280af22 2568 if (!PL_tainting)
22f7c9c9 2569 TOO_LATE_FOR('T');
463ee0b2
LW
2570 s++;
2571 return s;
79072805 2572 case 'u':
bf4acbe4
GS
2573#ifdef MACOS_TRADITIONAL
2574 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2575#endif
3280af22 2576 PL_do_undump = TRUE;
79072805
LW
2577 s++;
2578 return s;
2579 case 'U':
3280af22 2580 PL_unsafe = TRUE;
79072805
LW
2581 s++;
2582 return s;
2583 case 'v':
8e9464f1 2584#if !defined(DGUX)
b0e47665 2585 PerlIO_printf(PerlIO_stdout(),
d2560b70 2586 Perl_form(aTHX_ "\nThis is perl, v%"VDf" built for %s",
b0e47665 2587 PL_patchlevel, ARCHNAME));
8e9464f1
JH
2588#else /* DGUX */
2589/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2590 PerlIO_printf(PerlIO_stdout(),
2591 Perl_form(aTHX_ "\nThis is perl, version %vd\n", PL_patchlevel));
2592 PerlIO_printf(PerlIO_stdout(),
2593 Perl_form(aTHX_ " built under %s at %s %s\n",
2594 OSNAME, __DATE__, __TIME__));
2595 PerlIO_printf(PerlIO_stdout(),
2596 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2597 OSVERS));
8e9464f1
JH
2598#endif /* !DGUX */
2599
fb73857a
PP
2600#if defined(LOCAL_PATCH_COUNT)
2601 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2602 PerlIO_printf(PerlIO_stdout(),
2603 "\n(with %d registered patch%s, "
2604 "see perl -V for more detail)",
2605 (int)LOCAL_PATCH_COUNT,
2606 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2607#endif
1a30305b 2608
b0e47665 2609 PerlIO_printf(PerlIO_stdout(),
4c79ee7a 2610 "\n\nCopyright 1987-2003, Larry Wall\n");
eae9c151
JH
2611#ifdef MACOS_TRADITIONAL
2612 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2613 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 2614 "maintained by Chris Nandor\n");
eae9c151 2615#endif
79072805 2616#ifdef MSDOS
b0e47665
GS
2617 PerlIO_printf(PerlIO_stdout(),
2618 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2619#endif
2620#ifdef DJGPP
b0e47665
GS
2621 PerlIO_printf(PerlIO_stdout(),
2622 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2623 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2624#endif
79072805 2625#ifdef OS2
b0e47665
GS
2626 PerlIO_printf(PerlIO_stdout(),
2627 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 2628 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2629#endif
79072805 2630#ifdef atarist
b0e47665
GS
2631 PerlIO_printf(PerlIO_stdout(),
2632 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2633#endif
a3f9223b 2634#ifdef __BEOS__
b0e47665
GS
2635 PerlIO_printf(PerlIO_stdout(),
2636 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2637#endif
1d84e8df 2638#ifdef MPE
b0e47665 2639 PerlIO_printf(PerlIO_stdout(),
e583a879 2640 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
1d84e8df 2641#endif
9d116dd7 2642#ifdef OEMVS
b0e47665
GS
2643 PerlIO_printf(PerlIO_stdout(),
2644 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2645#endif
495c5fdc 2646#ifdef __VOS__
b0e47665 2647 PerlIO_printf(PerlIO_stdout(),
94efb9fb 2648 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 2649#endif
092bebab 2650#ifdef __OPEN_VM
b0e47665
GS
2651 PerlIO_printf(PerlIO_stdout(),
2652 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2653#endif
a1a0e61e 2654#ifdef POSIX_BC
b0e47665
GS
2655 PerlIO_printf(PerlIO_stdout(),
2656 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2657#endif
61ae2fbf 2658#ifdef __MINT__
b0e47665
GS
2659 PerlIO_printf(PerlIO_stdout(),
2660 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2661#endif
f83d2536 2662#ifdef EPOC
b0e47665 2663 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2664 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 2665#endif
e1caacb4 2666#ifdef UNDER_CE
b475b3e6
JH
2667 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
2668 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
e1caacb4
JH
2669 wce_hitreturn();
2670#endif
baed7233
DL
2671#ifdef BINARY_BUILD_NOTICE
2672 BINARY_BUILD_NOTICE;
2673#endif
b0e47665
GS
2674 PerlIO_printf(PerlIO_stdout(),
2675 "\n\
79072805 2676Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2677GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2678Complete documentation for Perl, including FAQ lists, should be found on\n\
2679this system using `man perl' or `perldoc perl'. If you have access to the\n\
2680Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
7ca617d0 2681 my_exit(0);
79072805 2682 case 'w':
599cee73 2683 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2684 PL_dowarn |= G_WARN_ON;
599cee73
PM
2685 s++;
2686 return s;
2687 case 'W':
ac27b0f5 2688 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS
2689 if (!specialWARN(PL_compiling.cop_warnings))
2690 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2691 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2692 s++;
2693 return s;
2694 case 'X':
ac27b0f5 2695 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS
2696 if (!specialWARN(PL_compiling.cop_warnings))
2697 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2698 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2699 s++;
2700 return s;
a0d0e21e 2701 case '*':
79072805
LW
2702 case ' ':
2703 if (s[1] == '-') /* Additional switches on #! line. */
2704 return s+2;
2705 break;
a0d0e21e 2706 case '-':
79072805 2707 case 0:
51882d45 2708#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2709 case '\r':
2710#endif
79072805
LW
2711 case '\n':
2712 case '\t':
2713 break;
aa689395
PP
2714#ifdef ALTERNATE_SHEBANG
2715 case 'S': /* OS/2 needs -S on "extproc" line. */
2716 break;
2717#endif
a0d0e21e 2718 case 'P':
3280af22 2719 if (PL_preprocess)
a0d0e21e
LW
2720 return s+1;
2721 /* FALL THROUGH */
79072805 2722 default:
cea2e8a9 2723 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2724 }
2725 return Nullch;
2726}
2727
2728/* compliments of Tom Christiansen */
2729
2730/* unexec() can be found in the Gnu emacs distribution */
ee580363 2731/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2732
2733void
864dbfa3 2734Perl_my_unexec(pTHX)
79072805
LW
2735{
2736#ifdef UNEXEC
46fc3d4c
PP
2737 SV* prog;
2738 SV* file;
ee580363 2739 int status = 1;
79072805
LW
2740 extern int etext;
2741
ee580363 2742 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2743 sv_catpv(prog, "/perl");
6b88bc9c 2744 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2745 sv_catpv(file, ".perldump");
79072805 2746
ee580363
GS
2747 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2748 /* unexec prints msg to stderr in case of failure */
6ad3d225 2749 PerlProc_exit(status);
79072805 2750#else
a5f75d66
AD
2751# ifdef VMS
2752# include <lib$routines.h>
2753 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2754# else
79072805 2755 ABORT(); /* for use with undump */
aa689395 2756# endif
a5f75d66 2757#endif
79072805
LW
2758}
2759
cb68f92d
GS
2760/* initialize curinterp */
2761STATIC void
cea2e8a9 2762S_init_interp(pTHX)
cb68f92d
GS
2763{
2764
acfe0abc
GS
2765#ifdef MULTIPLICITY
2766# define PERLVAR(var,type)
2767# define PERLVARA(var,n,type)
2768# if defined(PERL_IMPLICIT_CONTEXT)
2769# if defined(USE_5005THREADS)
2770# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2771# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
2772# else /* !USE_5005THREADS */
2773# define PERLVARI(var,type,init) aTHX->var = init;
2774# define PERLVARIC(var,type,init) aTHX->var = init;
2775# endif /* USE_5005THREADS */
3967c732 2776# else
acfe0abc
GS
2777# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2778# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2779# endif
acfe0abc
GS
2780# include "intrpvar.h"
2781# ifndef USE_5005THREADS
2782# include "thrdvar.h"
2783# endif
2784# undef PERLVAR
2785# undef PERLVARA
2786# undef PERLVARI
2787# undef PERLVARIC
2788#else
2789# define PERLVAR(var,type)
2790# define PERLVARA(var,n,type)
2791# define PERLVARI(var,type,init) PL_##var = init;
2792# define PERLVARIC(var,type,init) PL_##var = init;
2793# include "intrpvar.h"
2794# ifndef USE_5005THREADS
2795# include "thrdvar.h"
2796# endif
2797# undef PERLVAR
2798# undef PERLVARA
2799# undef PERLVARI
2800# undef PERLVARIC
cb68f92d
GS
2801#endif
2802
cb68f92d
GS
2803}
2804
76e3520e 2805STATIC void
cea2e8a9 2806S_init_main_stash(pTHX)
79072805 2807{
463ee0b2 2808 GV *gv;
6e72f9df 2809
3280af22 2810 PL_curstash = PL_defstash = newHV();
79cb57f6 2811 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
2812 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2813 SvREFCNT_dec(GvHV(gv));
3280af22 2814 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2815 SvREADONLY_on(gv);
3280af22
NIS
2816 HvNAME(PL_defstash) = savepv("main");
2817 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2818 GvMULTI_on(PL_incgv);
2819 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2820 GvMULTI_on(PL_hintgv);
2821 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2822 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2823 GvMULTI_on(PL_errgv);
2824 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2825 GvMULTI_on(PL_replgv);
cea2e8a9 2826 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
2827 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2828 sv_setpvn(ERRSV, "", 0);
3280af22 2829 PL_curstash = PL_defstash;
11faa288 2830 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2831 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2832 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2833 /* We must init $/ before switches are processed. */
864dbfa3 2834 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
2835}
2836
76e3520e 2837STATIC void
cea2e8a9 2838S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv, int *fdscript)
79072805 2839{
1b24ed4b
MS
2840 char *quote;
2841 char *code;
2842 char *cpp_discard_flag;
2843 char *perl;
2844
6c4ab083 2845 *fdscript = -1;
79072805 2846
3280af22
NIS
2847 if (PL_e_script) {
2848 PL_origfilename = savepv("-e");
96436eeb 2849 }
6c4ab083
GS
2850 else {
2851 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2852 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
2853
2854 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2855 char *s = scriptname + 8;
2856 *fdscript = atoi(s);
2857 while (isDIGIT(*s))
2858 s++;
2859 if (*s) {
2860 scriptname = savepv(s + 1);
3280af22
NIS
2861 Safefree(PL_origfilename);
2862 PL_origfilename = scriptname;
6c4ab083
GS
2863 }
2864 }
2865 }
2866
05ec9bb3 2867 CopFILE_free(PL_curcop);
57843af0 2868 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 2869 if (strEQ(PL_origfilename,"-"))
79072805 2870 scriptname = "";
01f988be 2871 if (*fdscript >= 0) {
3280af22 2872 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS
2873# if defined(HAS_FCNTL) && defined(F_SETFD)
2874 if (PL_rsfp)
2875 /* ensure close-on-exec */
2876 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2877# endif
96436eeb 2878 }
3280af22 2879 else if (PL_preprocess) {
46fc3d4c 2880 char *cpp_cfg = CPPSTDIN;
79cb57f6 2881 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
2882 SV *cmd = NEWSV(0,0);
2883
2884 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 2885 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 2886 sv_catpv(cpp, cpp_cfg);
79072805 2887
1b24ed4b
MS
2888# ifndef VMS
2889 sv_catpvn(sv, "-I", 2);
2890 sv_catpv(sv,PRIVLIB_EXP);
2891# endif
46fc3d4c 2892
14953ddc
MB
2893 DEBUG_P(PerlIO_printf(Perl_debug_log,
2894 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
2895 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS
2896
2897# if defined(MSDOS) || defined(WIN32) || defined(VMS)
2898 quote = "\"";
2899# else
2900 quote = "'";
2901# endif
2902
2903# ifdef VMS
2904 cpp_discard_flag = "";
2905# else
2906 cpp_discard_flag = "-C";
2907# endif
2908
2909# ifdef OS2
2910 perl = os2_execname(aTHX);
2911# else
2912 perl = PL_origargv[0];
2913# endif
2914
2915
2916 /* This strips off Perl comments which might interfere with
62375a60
NIS
2917 the C pre-processor, including #!. #line directives are
2918 deliberately stripped to avoid confusion with Perl's version
1b24ed4b
MS
2919 of #line. FWP played some golf with it so it will fit
2920 into VMS's 255 character buffer.
2921 */
2922 if( PL_doextract )
2923 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2924 else
2925 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
2926
2927 Perl_sv_setpvf(aTHX_ cmd, "\
2928%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
62375a60 2929 perl, quote, code, quote, scriptname, cpp,
1b24ed4b
MS
2930 cpp_discard_flag, sv, CPPMINUS);
2931
3280af22 2932 PL_doextract = FALSE;
1b24ed4b
MS
2933# ifdef IAMSUID /* actually, this is caught earlier */
2934 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2935# ifdef HAS_SETEUID
2936 (void)seteuid(PL_uid); /* musn't stay setuid root */
2937# else
2938# ifdef HAS_SETREUID
2939 (void)setreuid((Uid_t)-1, PL_uid);
2940# else
2941# ifdef HAS_SETRESUID
2942 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2943# else
2944 PerlProc_setuid(PL_uid);
2945# endif
2946# endif
2947# endif
b28d0864 2948 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 2949 Perl_croak(aTHX_ "Can't do seteuid!\n");
79072805 2950 }
1b24ed4b 2951# endif /* IAMSUID */
0a6c758d 2952
62375a60
NIS
2953 DEBUG_P(PerlIO_printf(Perl_debug_log,
2954 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS
2955 SvPVX(cmd)));
2956
3280af22 2957 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c
PP
2958 SvREFCNT_dec(cmd);
2959 SvREFCNT_dec(cpp);
79072805
LW
2960 }
2961 else if (!*scriptname) {
bbce6d69 2962 forbid_setid("program input from stdin");
3280af22 2963 PL_rsfp = PerlIO_stdin();
79072805 2964 }
96436eeb 2965 else {
3280af22 2966 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS
2967# if defined(HAS_FCNTL) && defined(F_SETFD)
2968 if (PL_rsfp)
2969 /* ensure close-on-exec */
2970 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
2971# endif
96436eeb 2972 }
3280af22 2973 if (!PL_rsfp) {
1b24ed4b
MS
2974# ifdef DOSUID
2975# ifndef IAMSUID /* in case script is not readable before setuid */
2976 if (PL_euid &&
2977 PerlLIO_stat(CopFILE(PL_curcop),&PL_statbuf) >= 0 &&
2978 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2979 {
2980 /* try again */
b35112e7 2981 PERL_FPU_PRE_EXEC
62375a60
NIS
2982 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT,
2983 BIN_EXP, (int)PERL_REVISION,
1b24ed4b
MS
2984 (int)PERL_VERSION,
2985 (int)PERL_SUBVERSION), PL_origargv);
b35112e7 2986 PERL_FPU_POST_EXEC
1b24ed4b
MS
2987 Perl_croak(aTHX_ "Can't do setuid\n");
2988 }
2989# endif
2990# endif
2991# ifdef IAMSUID
2992 errno = EPERM;
2993 Perl_croak(aTHX_ "Can't open perl script: %s\n",
2994 Strerror(errno));
2995# else
2996 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
2997 CopFILE(PL_curcop), Strerror(errno));
2998# endif
13281fa4 2999 }
79072805 3000}
8d063cd8 3001
7b89560d
JH
3002/* Mention
3003 * I_SYSSTATVFS HAS_FSTATVFS
3004 * I_SYSMOUNT
c890dc6c 3005 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
3006 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3007 * here so that metaconfig picks them up. */
3008
104d25b7 3009#ifdef IAMSUID
864dbfa3 3010STATIC int
e688b231 3011S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 3012{
0545a864
JH
3013 int check_okay = 0; /* able to do all the required sys/libcalls */
3014 int on_nosuid = 0; /* the fd is on a nosuid fs */
104d25b7 3015/*
ad27e871 3016 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 3017 * fstatvfs() is UNIX98.
0545a864 3018 * fstatfs() is 4.3 BSD.
ad27e871 3019 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
3020 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3021 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
3022 */
3023
6439433f
JH
3024#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3025
3026# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3027 defined(HAS_FSTATVFS)
3028# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 3029 struct statvfs stfs;
6439433f 3030
104d25b7
JH
3031 check_okay = fstatvfs(fd, &stfs) == 0;
3032 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
6439433f 3033# endif /* fstatvfs */
ac27b0f5 3034
6439433f
JH
3035# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3036 defined(PERL_MOUNT_NOSUID) && \
3037 defined(HAS_FSTATFS) && \
3038 defined(HAS_STRUCT_STATFS) && \
3039 defined(HAS_STRUCT_STATFS_F_FLAGS)
3040# define FD_ON_NOSUID_CHECK_OKAY
e688b231 3041 struct statfs stfs;
6439433f 3042
104d25b7 3043 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 3044 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
6439433f
JH
3045# endif /* fstatfs */
3046
3047# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3048 defined(PERL_MOUNT_NOSUID) && \
3049 defined(HAS_FSTAT) && \
3050 defined(HAS_USTAT) && \
3051 defined(HAS_GETMNT) && \
3052 defined(HAS_STRUCT_FS_DATA) && \
3053 defined(NOSTAT_ONE)
3054# define FD_ON_NOSUID_CHECK_OKAY
c623ac67 3055 Stat_t fdst;
6439433f 3056
0545a864 3057 if (fstat(fd, &fdst) == 0) {
6439433f
JH
3058 struct ustat us;
3059 if (ustat(fdst.st_dev, &us) == 0) {
3060 struct fs_data fsd;
3061 /* NOSTAT_ONE here because we're not examining fields which
3062 * vary between that case and STAT_ONE. */
ad27e871 3063 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
3064 size_t cmplen = sizeof(us.f_fname);
3065 if (sizeof(fsd.fd_req.path) < cmplen)
3066 cmplen = sizeof(fsd.fd_req.path);
3067 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3068 fdst.st_dev == fsd.fd_req.dev) {
3069 check_okay = 1;
3070 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3071 }
3072 }
3073 }
3074 }
0545a864 3075 }
6439433f
JH
3076# endif /* fstat+ustat+getmnt */
3077
3078# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3079 defined(HAS_GETMNTENT) && \
3080 defined(HAS_HASMNTOPT) && \
3081 defined(MNTOPT_NOSUID)
3082# define FD_ON_NOSUID_CHECK_OKAY
3083 FILE *mtab = fopen("/etc/mtab", "r");
3084 struct mntent *entry;
c623ac67 3085 Stat_t stb, fsb;
104d25b7
JH
3086
3087 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
3088 while (entry = getmntent(mtab)) {
3089 if (stat(entry->mnt_dir, &fsb) == 0
3090 && fsb.st_dev == stb.st_dev)
3091 {
3092 /* found the filesystem */
3093 check_okay = 1;
3094 if (hasmntopt(entry, MNTOPT_NOSUID))
3095 on_nosuid = 1;
3096 break;
3097 } /* A single fs may well fail its stat(). */
3098 }
104d25b7
JH
3099 }
3100 if (mtab)
6439433f
JH
3101 fclose(mtab);
3102# endif /* getmntent+hasmntopt */
0545a864 3103
ac27b0f5 3104 if (!check_okay)
0545a864 3105 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid", PL_origfilename);
104d25b7
JH
3106 return on_nosuid;
3107}
3108#endif /* IAMSUID */
3109
76e3520e 3110STATIC void
cea2e8a9 3111S_validate_suid(pTHX_ char *validarg, char *scriptname, int fdscript)
79072805 3112{
155aba94 3113#ifdef IAMSUID
96436eeb 3114 int which;
155aba94 3115#endif
96436eeb 3116
13281fa4
LW
3117 /* do we need to emulate setuid on scripts? */
3118
3119 /* This code is for those BSD systems that have setuid #! scripts disabled
3120 * in the kernel because of a security problem. Merely defining DOSUID
3121 * in perl will not fix that problem, but if you have disabled setuid
3122 * scripts in the kernel, this will attempt to emulate setuid and setgid
3123 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
3124 * root version must be called suidperl or sperlN.NNN. If regular perl
3125 * discovers that it has opened a setuid script, it calls suidperl with
3126 * the same argv that it had. If suidperl finds that the script it has
3127 * just opened is NOT setuid root, it sets the effective uid back to the
3128 * uid. We don't just make perl setuid root because that loses the
3129 * effective uid we had before invoking perl, if it was different from the
3130 * uid.
13281fa4
LW
3131 *
3132 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3133 * be defined in suidperl only. suidperl must be setuid root. The
3134 * Configure script will set this up for you if you want it.
3135 */
a687059c 3136
13281fa4 3137#ifdef DOSUID
6e72f9df 3138 char *s, *s2;
a0d0e21e 3139
b28d0864 3140 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 3141 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
b28d0864 3142 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 3143 I32 len;
2d8e6c8d 3144 STRLEN n_a;
13281fa4 3145
a687059c 3146#ifdef IAMSUID
fe14fcc3 3147#ifndef HAS_SETREUID
a687059c
LW
3148 /* On this access check to make sure the directories are readable,
3149 * there is actually a small window that the user could use to make
3150 * filename point to an accessible directory. So there is a faint
3151 * chance that someone could execute a setuid script down in a
3152 * non-accessible directory. I don't know what to do about that.
3153 * But I don't think it's too important. The manual lies when
3154 * it says access() is useful in setuid programs.
3155 */
cc49e20b 3156 if (PerlLIO_access(CopFILE(PL_curcop),1)) /*double check*/
cea2e8a9 3157 Perl_croak(aTHX_ "Permission denied");
a687059c
LW
3158#else
3159 /* If we can swap euid and uid, then we can determine access rights
3160 * with a simple stat of the file, and then compare device and
3161 * inode to make sure we did stat() on the same file we opened.
3162 * Then we just have to make sure he or she can execute it.
3163 */
3164 {
c623ac67 3165 Stat_t tmpstatbuf;
a687059c 3166
85e6fe83
LW
3167 if (
3168#ifdef HAS_SETREUID
b28d0864 3169 setreuid(PL_euid,PL_uid) < 0
a0d0e21e
LW
3170#else
3171# if HAS_SETRESUID
b28d0864 3172 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
a0d0e21e 3173# endif
85e6fe83 3174#endif
b28d0864 3175 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
cea2e8a9 3176 Perl_croak(aTHX_ "Can't swap uid and euid"); /* really paranoid */
cc49e20b 3177 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0)
cea2e8a9 3178 Perl_croak(aTHX_ "Permission denied"); /* testing full pathname here */
2bb3463c 3179#if defined(IAMSUID) && !defined(NO_NOSUID_CHECK)
e688b231 3180 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp)))
cea2e8a9 3181 Perl_croak(aTHX_ "Permission denied");
104d25b7 3182#endif
b28d0864
NIS
3183 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3184 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3185 (void)PerlIO_close(PL_rsfp);
cea2e8a9 3186 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3187 }
85e6fe83
LW
3188 if (
3189#ifdef HAS_SETREUID
b28d0864 3190 setreuid(PL_uid,PL_euid) < 0
a0d0e21e
LW
3191#else
3192# if defined(HAS_SETRESUID)
b28d0864 3193 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
a0d0e21e 3194# endif
85e6fe83 3195#endif
b28d0864 3196 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
cea2e8a9 3197 Perl_croak(aTHX_ "Can't reswap uid and euid");
b28d0864 3198 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
cea2e8a9 3199 Perl_croak(aTHX_ "Permission denied\n");
a687059c 3200 }
fe14fcc3 3201#endif /* HAS_SETREUID */
a687059c
LW
3202#endif /* IAMSUID */
3203
b28d0864 3204 if (!S_ISREG(PL_statbuf.st_mode))
cea2e8a9 3205 Perl_croak(aTHX_ "Permission denied");
b28d0864 3206 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3207 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3208 PL_doswitches = FALSE; /* -s is insecure in suid */
57843af0 3209 CopLINE_inc(PL_curcop);
6b88bc9c 3210 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3211 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3212 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3213 s = SvPV(PL_linestr,n_a)+2;
663a0e37 3214 if (*s == ' ') s++;
45d8adaa 3215 while (!isSPACE(*s)) s++;
2d8e6c8d 3216 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df
PP
3217 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3218 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
cea2e8a9 3219 Perl_croak(aTHX_ "Not a perl script");
a687059c 3220 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3221 /*
3222 * #! arg must be what we saw above. They can invoke it by
3223 * mentioning suidperl explicitly, but they may not add any strange
3224 * arguments beyond what #! says if they do invoke suidperl that way.
3225 */
3226 len = strlen(validarg);
3227 if (strEQ(validarg," PHOOEY ") ||
45d8adaa 3228 strnNE(s,validarg,len) || !isSPACE(s[len]))
cea2e8a9 3229 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW
3230
3231#ifndef IAMSUID
b28d0864
NIS
3232 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3233 PL_euid == PL_statbuf.st_uid)
3234 if (!PL_do_undump)
cea2e8a9 3235 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3236FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3237#endif /* IAMSUID */
13281fa4 3238
b28d0864
NIS
3239 if (PL_euid) { /* oops, we're not the setuid root perl */
3240 (void)PerlIO_close(PL_rsfp);
13281fa4 3241#ifndef IAMSUID
46fc3d4c 3242 /* try again */
b35112e7 3243 PERL_FPU_PRE_EXEC
a7cb1f99 3244 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3245 (int)PERL_REVISION, (int)PERL_VERSION,
3246 (int)PERL_SUBVERSION), PL_origargv);
b35112e7 3247 PERL_FPU_POST_EXEC
13281fa4 3248#endif
cea2e8a9 3249 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4
LW
3250 }
3251
b28d0864 3252 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
fe14fcc3 3253#ifdef HAS_SETEGID
b28d0864 3254 (void)setegid(PL_statbuf.st_gid);
a687059c 3255#else
fe14fcc3 3256#ifdef HAS_SETREGID
b28d0864 3257 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW
3258#else
3259#ifdef HAS_SETRESGID
b28d0864 3260 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3261#else
b28d0864 3262 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW
3263#endif
3264#endif
85e6fe83 3265#endif
b28d0864 3266 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3267 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3268 }
b28d0864
NIS
3269 if (PL_statbuf.st_mode & S_ISUID) {
3270 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 3271#ifdef HAS_SETEUID
b28d0864 3272 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
a687059c 3273#else
fe14fcc3 3274#ifdef HAS_SETREUID
b28d0864 3275 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
85e6fe83
LW
3276#else
3277#ifdef HAS_SETRESUID
b28d0864 3278 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
a687059c 3279#else
b28d0864 3280 PerlProc_setuid(PL_statbuf.st_uid);
a687059c
LW
3281#endif
3282#endif
85e6fe83 3283#endif
b28d0864 3284 if (PerlProc_geteuid() != PL_statbuf.st_uid)
cea2e8a9 3285 Perl_croak(aTHX_ "Can't do seteuid!\n");
a687059c 3286 }
b28d0864 3287 else if (PL_uid) { /* oops, mustn't run as root */
fe14fcc3 3288#ifdef HAS_SETEUID
b28d0864 3289 (void)seteuid((Uid_t)PL_uid);
a687059c 3290#else
fe14fcc3 3291#ifdef HAS_SETREUID
b28d0864 3292 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
a687059c 3293#else
85e6fe83 3294#ifdef HAS_SETRESUID
b28d0864 3295 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
85e6fe83 3296#else
b28d0864 3297 PerlProc_setuid((Uid_t)PL_uid);
85e6fe83 3298#endif
a687059c
LW
3299#endif
3300#endif
b28d0864 3301 if (PerlProc_geteuid() != PL_uid)
cea2e8a9 3302 Perl_croak(aTHX_ "Can't do seteuid!\n");
83025b21 3303 }
748a9306 3304 init_ids();
b28d0864 3305 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
cea2e8a9 3306 Perl_croak(aTHX_ "Permission denied\n"); /* they can't do this */
13281fa4
LW
3307 }
3308#ifdef IAMSUID
6b88bc9c 3309 else if (PL_preprocess)
cea2e8a9 3310 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
96436eeb 3311 else if (fdscript >= 0)
cea2e8a9 3312 Perl_croak(aTHX_ "fd script not allowed in suidperl\n");
13281fa4 3313 else
cea2e8a9 3314 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
96436eeb
PP
3315
3316 /* We absolutely must clear out any saved ids here, so we */
3317 /* exec the real perl, substituting fd script for scriptname. */
3318 /* (We pass script name as "subdir" of fd, which perl will grok.) */
b28d0864
NIS
3319 PerlIO_rewind(PL_rsfp);
3320 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
6b88bc9c
GS
3321 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3322 if (!PL_origargv[which])
cea2e8a9
GS
3323 Perl_croak(aTHX_ "Permission denied");
3324 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
6b88bc9c 3325 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
96436eeb 3326#if defined(HAS_FCNTL) && defined(F_SETFD)
b28d0864 3327 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
96436eeb 3328#endif
b35112e7 3329 PERL_FPU_PRE_EXEC
a7cb1f99 3330 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3331 (int)PERL_REVISION, (int)PERL_VERSION,
3332 (int)PERL_SUBVERSION), PL_origargv);/* try again */
b35112e7 3333 PERL_FPU_POST_EXEC
cea2e8a9 3334 Perl_croak(aTHX_ "Can't do setuid\n");
13281fa4 3335#endif /* IAMSUID */
a687059c 3336#else /* !DOSUID */
3280af22 3337 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
a687059c 3338#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
b28d0864
NIS
3339 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3340 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
a687059c 3341 ||
b28d0864 3342 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
a687059c 3343 )
b28d0864 3344 if (!PL_do_undump)
cea2e8a9 3345 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
a687059c
LW
3346FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3347#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3348 /* not set-id, must be wrapped */
a687059c 3349 }
13281fa4 3350#endif /* DOSUID */
79072805 3351}
13281fa4 3352
76e3520e 3353STATIC void
cea2e8a9 3354S_find_beginning(pTHX)
79072805 3355{
6e72f9df 3356 register char *s, *s2;
e55ac0fa
HS
3357#ifdef MACOS_TRADITIONAL
3358 int maclines = 0;
3359#endif
33b78306
LW
3360
3361 /* skip forward in input to the real script? */
3362
bbce6d69 3363 forbid_setid("-x");
bf4acbe4 3364#ifdef MACOS_TRADITIONAL
084592ab 3365 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
ac27b0f5 3366
bf4acbe4
GS
3367 while (PL_doextract || gMacPerl_AlwaysExtract) {
3368 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3369 if (!gMacPerl_AlwaysExtract)
3370 Perl_croak(aTHX_ "No Perl script found in input\n");
e55ac0fa 3371
bf4acbe4
GS
3372 if (PL_doextract) /* require explicit override ? */
3373 if (!OverrideExtract(PL_origfilename))
3374 Perl_croak(aTHX_ "User aborted script\n");
3375 else
3376 PL_doextract = FALSE;
e55ac0fa 3377
bf4acbe4
GS
3378 /* Pater peccavi, file does not have #! */
3379 PerlIO_rewind(PL_rsfp);
e55ac0fa 3380
bf4acbe4
GS
3381 break;
3382 }
3383#else
3280af22
NIS
3384 while (PL_doextract) {
3385 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
cea2e8a9 3386 Perl_croak(aTHX_ "No Perl script found in input\n");
bf4acbe4 3387#endif
4f0c37ba
IZ
3388 s2 = s;
3389 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3280af22
NIS
3390 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3391 PL_doextract = FALSE;
6e72f9df
PP
3392 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3393 s2 = s;
3394 while (*s == ' ' || *s == '\t') s++;
3395 if (*s++ == '-') {
3396 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3397 if (strnEQ(s2-4,"perl",4))
3398 /*SUPPRESS 530*/
155aba94
GS
3399 while ((s = moreswitches(s)))
3400 ;
33b78306 3401 }
95e8664e 3402#ifdef MACOS_TRADITIONAL
e55ac0fa
HS
3403 /* We are always searching for the #!perl line in MacPerl,
3404 * so if we find it, still keep the line count correct
3405 * by counting lines we already skipped over
3406 */
3407 for (; maclines > 0 ; maclines--)
3408 PerlIO_ungetc(PL_rsfp, '\n');
3409
95e8664e 3410 break;
e55ac0fa
HS
3411
3412 /* gMacPerl_AlwaysExtract is false in MPW tool */
3413 } else if (gMacPerl_AlwaysExtract) {
3414 ++maclines;
95e8664e 3415#endif
83025b21
LW
3416 }
3417 }
3418}
3419
afe37c7d 3420
76e3520e 3421STATIC void
cea2e8a9 3422S_init_ids(pTHX)
352d5a3a 3423{
d8eceb89
JH
3424 PL_uid = PerlProc_getuid();
3425 PL_euid = PerlProc_geteuid();
3426 PL_gid = PerlProc_getgid();
3427 PL_egid = PerlProc_getegid();
748a9306 3428#ifdef VMS
b28d0864
NIS
3429 PL_uid |= PL_gid << 16;
3430 PL_euid |= PL_egid << 16;
748a9306 3431#endif
22f7c9c9
JH
3432 /* Should not happen: */
3433 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3280af22 3434 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
748a9306 3435}
79072805 3436
a0643315
JH
3437/* This is used very early in the lifetime of the program,
3438 * before even the options are parsed, so PL_tainting has
b0891165 3439 * not been initialized properly. */
af419de7 3440bool
22f7c9c9
JH
3441Perl_doing_taint(int argc, char *argv[], char *envp[])
3442{
c3446a78
JH
3443#ifndef PERL_IMPLICIT_SYS
3444 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3445 * before we have an interpreter-- and the whole point of this
3446 * function is to be called at such an early stage. If you are on
3447 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3448 * "tainted because running with altered effective ids', you'll
3449 * have to add your own checks somewhere in here. The two most
3450 * known samples of 'implicitness' are Win32 and NetWare, neither
3451 * of which has much of concept of 'uids'. */
af419de7 3452 int uid = PerlProc_getuid();
22f7c9c9 3453 int euid = PerlProc_geteuid();
af419de7 3454 int gid = PerlProc_getgid();
22f7c9c9
JH
3455 int egid = PerlProc_getegid();
3456
3457#ifdef VMS
af419de7 3458 uid |= gid << 16;
22f7c9c9
JH
3459 euid |= egid << 16;
3460#endif
3461 if (uid && (euid != uid || egid != gid))
3462 return 1;
c3446a78 3463#endif /* !PERL_IMPLICIT_SYS */
af419de7
JH
3464 /* This is a really primitive check; environment gets ignored only
3465 * if -T are the first chars together; otherwise one gets
3466 * "Too late" message. */
22f7c9c9
JH
3467 if ( argc > 1 && argv[1][0] == '-'
3468 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3469 return 1;
3470 return 0;
3471}
22f7c9c9 3472
76e3520e 3473STATIC void
cea2e8a9 3474S_forbid_setid(pTHX_ char *s)
bbce6d69 3475{
3280af22 3476 if (PL_euid != PL_uid)
cea2e8a9 3477 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3280af22 3478 if (PL_egid != PL_gid)
cea2e8a9 3479 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
bbce6d69
PP
3480}
3481
1ee4443e
IZ
3482void
3483Perl_init_debugger(pTHX)
748a9306 3484{
1ee4443e
IZ
3485 HV *ostash = PL_curstash;
3486
3280af22 3487 PL_curstash = PL_debstash;
7619c85e 3488 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
3280af22 3489 AvREAL_off(PL_dbargs);
7619c85e
RG
3490 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
3491 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3492 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
1ee4443e 3493 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
7619c85e 3494 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3495 sv_setiv(PL_DBsingle, 0);
7619c85e 3496 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3497 sv_setiv(PL_DBtrace, 0);
7619c85e 3498 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
ac27b0f5 3499 sv_setiv(PL_DBsignal, 0);
06492da6
SF
3500 PL_DBassertion = GvSV((gv_fetchpv("assertion", GV_ADDMULTI, SVt_PV)));
3501 sv_setiv(PL_DBassertion, 0);
1ee4443e 3502 PL_curstash = ostash;
352d5a3a
LW
3503}
3504
2ce36478
SM
3505#ifndef STRESS_REALLOC
3506#define REASONABLE(size) (size)
3507#else
3508#define REASONABLE(size) (1) /* unreasonable */
3509#endif
3510
11343788 3511void
cea2e8a9 3512Perl_init_stacks(pTHX)
79072805 3513{
e336de0d 3514 /* start with 128-item stack and 8K cxstack */
3280af22 3515 PL_curstackinfo = new_stackinfo(REASONABLE(128),
e336de0d 3516