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1/* perl.c
2 *
4bb101f2 3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
b5f8cc5c 4 * 2000, 2001, 2002, 2003, 2004, 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
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15/* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
ddfa107c 18 * function of the interpreter; that can be found in perlmain.c
166f8a29
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19 */
20
ae3f3efd
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21/* PSz 12 Nov 03
22 *
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
26 *
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
32 *
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
38 *
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
42 *
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
45 *
46 * References:
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
55 * CVE candidate:
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
62 *
63Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64School of Mathematics and Statistics University of Sydney 2006 Australia
65 *
66 */
67/* PSz 13 Nov 03
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
70 */
71
72/* PSz 18 Feb 04
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
78 */
79
378cc40b 80#include "EXTERN.h"
864dbfa3 81#define PERL_IN_PERL_C
378cc40b 82#include "perl.h"
e3321bb0 83#include "patchlevel.h" /* for local_patches */
378cc40b 84
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85#ifdef NETWARE
86#include "nwutil.h"
87char *nw_get_sitelib(const char *pl);
88#endif
89
df5cef82 90/* XXX If this causes problems, set i_unistd=undef in the hint file. */
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91#ifdef I_UNISTD
92#include <unistd.h>
93#endif
a0d0e21e 94
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95#ifdef __BEOS__
96# define HZ 1000000
97#endif
98
99#ifndef HZ
100# ifdef CLK_TCK
101# define HZ CLK_TCK
102# else
103# define HZ 60
104# endif
105#endif
106
7114a2d2 107#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
20ce7b12 108char *getenv (char *); /* Usually in <stdlib.h> */
54310121
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109#endif
110
acfe0abc 111static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
0cb96387 112
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113#ifdef IAMSUID
114#ifndef DOSUID
115#define DOSUID
116#endif
ae3f3efd 117#endif /* IAMSUID */
378cc40b 118
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119#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
120#ifdef DOSUID
121#undef DOSUID
122#endif
123#endif
8d063cd8 124
3db8f154 125#if defined(USE_ITHREADS)
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GS
126# define INIT_TLS_AND_INTERP \
127 STMT_START { \
128 if (!PL_curinterp) { \
129 PERL_SET_INTERP(my_perl); \
130 INIT_THREADS; \
131 ALLOC_THREAD_KEY; \
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132 PERL_SET_THX(my_perl); \
133 OP_REFCNT_INIT; \
7d4724a4 134 MUTEX_INIT(&PL_dollarzero_mutex); \
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135 } \
136 else { \
137 PERL_SET_THX(my_perl); \
06d86050 138 } \
06d86050 139 } STMT_END
3db8f154 140#else
06d86050
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141# define INIT_TLS_AND_INTERP \
142 STMT_START { \
143 if (!PL_curinterp) { \
144 PERL_SET_INTERP(my_perl); \
145 } \
146 PERL_SET_THX(my_perl); \
147 } STMT_END
148# endif
06d86050 149
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150#ifdef PERL_IMPLICIT_SYS
151PerlInterpreter *
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152perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
153 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
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154 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
155 struct IPerlDir* ipD, struct IPerlSock* ipS,
156 struct IPerlProc* ipP)
157{
158 PerlInterpreter *my_perl;
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159 /* New() needs interpreter, so call malloc() instead */
160 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
06d86050 161 INIT_TLS_AND_INTERP;
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162 Zero(my_perl, 1, PerlInterpreter);
163 PL_Mem = ipM;
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164 PL_MemShared = ipMS;
165 PL_MemParse = ipMP;
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166 PL_Env = ipE;
167 PL_StdIO = ipStd;
168 PL_LIO = ipLIO;
169 PL_Dir = ipD;
170 PL_Sock = ipS;
171 PL_Proc = ipP;
7766f137 172
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173 return my_perl;
174}
175#else
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176
177/*
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178=head1 Embedding Functions
179
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180=for apidoc perl_alloc
181
182Allocates a new Perl interpreter. See L<perlembed>.
183
184=cut
185*/
186
93a17b20 187PerlInterpreter *
cea2e8a9 188perl_alloc(void)
79072805 189{
cea2e8a9 190 PerlInterpreter *my_perl;
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191#ifdef USE_5005THREADS
192 dTHX;
193#endif
79072805 194
54aff467 195 /* New() needs interpreter, so call malloc() instead */
e8ee3774 196 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 197
06d86050 198 INIT_TLS_AND_INTERP;
e90e2364 199 return ZeroD(my_perl, 1, PerlInterpreter);
79072805 200}
32e30700 201#endif /* PERL_IMPLICIT_SYS */
79072805 202
954c1994
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203/*
204=for apidoc perl_construct
205
206Initializes a new Perl interpreter. See L<perlembed>.
207
208=cut
209*/
210
79072805 211void
0cb96387 212perl_construct(pTHXx)
79072805 213{
8990e307 214#ifdef MULTIPLICITY
54aff467 215 init_interp();
ac27b0f5 216 PL_perl_destruct_level = 1;
54aff467
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217#else
218 if (PL_perl_destruct_level > 0)
219 init_interp();
220#endif
33f46ff6 221 /* Init the real globals (and main thread)? */
3280af22 222 if (!PL_linestr) {
14dd3ad8 223#ifdef PERL_FLEXIBLE_EXCEPTIONS
0b94c7bb 224 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
14dd3ad8 225#endif
312caa8e 226
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227 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
228
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229 PL_linestr = NEWSV(65,79);
230 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 231
3280af22 232 if (!SvREADONLY(&PL_sv_undef)) {
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233 /* set read-only and try to insure than we wont see REFCNT==0
234 very often */
235
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236 SvREADONLY_on(&PL_sv_undef);
237 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 238
3280af22 239 sv_setpv(&PL_sv_no,PL_No);
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240 /* value lookup in void context - happens to have the side effect
241 of caching the numeric forms. */
242 SvIV(&PL_sv_no);
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243 SvNV(&PL_sv_no);
244 SvREADONLY_on(&PL_sv_no);
245 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 246
3280af22 247 sv_setpv(&PL_sv_yes,PL_Yes);
0309f36e 248 SvIV(&PL_sv_yes);
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249 SvNV(&PL_sv_yes);
250 SvREADONLY_on(&PL_sv_yes);
251 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
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252
253 SvREADONLY_on(&PL_sv_placeholder);
254 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
6e72f9df 255 }
79072805 256
cea2e8a9 257 PL_sighandlerp = Perl_sighandler;
3280af22 258 PL_pidstatus = newHV();
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259 }
260
8bfdd7d9 261 PL_rs = newSVpvn("\n", 1);
dc92893f 262
cea2e8a9 263 init_stacks();
79072805 264
748a9306 265 init_ids();
3280af22 266 PL_lex_state = LEX_NOTPARSING;
a5f75d66 267
312caa8e 268 JMPENV_BOOTSTRAP;
f86702cc
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269 STATUS_ALL_SUCCESS;
270
0672f40e 271 init_i18nl10n(1);
36477c24 272 SET_NUMERIC_STANDARD();
0b5b802d 273
ab821d7f 274#if defined(LOCAL_PATCH_COUNT)
3280af22 275 PL_localpatches = local_patches; /* For possible -v */
ab821d7f
PP
276#endif
277
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278#ifdef HAVE_INTERP_INTERN
279 sys_intern_init();
280#endif
281
3a1ee7e8 282 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 283
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284 PL_fdpid = newAV(); /* for remembering popen pids by fd */
285 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 286 PL_errors = newSVpvn("",0);
48c6b404 287 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
1f483ca1
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288 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
289 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
1fcf4c12 290#ifdef USE_ITHREADS
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AB
291 PL_regex_padav = newAV();
292 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
293 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 294#endif
e5dd39fc 295#ifdef USE_REENTRANT_API
59bd0823 296 Perl_reentrant_init(aTHX);
e5dd39fc 297#endif
3d47000e
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298
299 /* Note that strtab is a rather special HV. Assumptions are made
300 about not iterating on it, and not adding tie magic to it.
301 It is properly deallocated in perl_destruct() */
302 PL_strtab = newHV();
303
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304 HvSHAREKEYS_off(PL_strtab); /* mandatory */
305 hv_ksplit(PL_strtab, 512);
306
0631ea03
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307#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
308 _dyld_lookup_and_bind
309 ("__environ", (unsigned long *) &environ_pointer, NULL);
310#endif /* environ */
311
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JH
312#ifndef PERL_MICRO
313# ifdef USE_ENVIRON_ARRAY
0631ea03 314 PL_origenviron = environ;
2f42fcb0 315# endif
0631ea03
AB
316#endif
317
5311654c
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318 /* Use sysconf(_SC_CLK_TCK) if available, if not
319 * available or if the sysconf() fails, use the HZ. */
320#if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK)
321 PL_clocktick = sysconf(_SC_CLK_TCK);
322 if (PL_clocktick <= 0)
323#endif
324 PL_clocktick = HZ;
325
081fc587
AB
326 PL_stashcache = newHV();
327
d7aa5382
JP
328 PL_patchlevel = newSVpv(
329 Perl_form(aTHX_ "%d.%d.%d",
330 (int)PERL_REVISION,
331 (int)PERL_VERSION,
332 (int)PERL_SUBVERSION ), 0
333 );
334
8990e307 335 ENTER;
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336}
337
954c1994 338/*
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339=for apidoc nothreadhook
340
341Stub that provides thread hook for perl_destruct when there are
342no threads.
343
344=cut
345*/
346
347int
4e9e3734 348Perl_nothreadhook(pTHX)
62375a60
NIS
349{
350 return 0;
351}
352
353/*
954c1994
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354=for apidoc perl_destruct
355
356Shuts down a Perl interpreter. See L<perlembed>.
357
358=cut
359*/
360
31d77e54 361int
0cb96387 362perl_destruct(pTHXx)
79072805 363{
7c474504 364 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 365 HV *hv;
4d1ff10f 366#ifdef USE_5005THREADS
cea2e8a9 367 dTHX;
4d1ff10f 368#endif /* USE_5005THREADS */
8990e307 369
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370 /* wait for all pseudo-forked children to finish */
371 PERL_WAIT_FOR_CHILDREN;
372
3280af22 373 destruct_level = PL_perl_destruct_level;
4633a7c4
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374#ifdef DEBUGGING
375 {
376 char *s;
155aba94 377 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
5f05dabc
PP
378 int i = atoi(s);
379 if (destruct_level < i)
380 destruct_level = i;
381 }
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382 }
383#endif
384
31d77e54
AB
385
386 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
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387 dJMPENV;
388 int x = 0;
389
390 JMPENV_PUSH(x);
391 if (PL_endav && !PL_minus_c)
392 call_list(PL_scopestack_ix, PL_endav);
393 JMPENV_POP;
26f423df 394 }
f3faeb53 395 LEAVE;
a0d0e21e
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396 FREETMPS;
397
e00b64d4 398 /* Need to flush since END blocks can produce output */
f13a2bc0 399 my_fflush_all();
e00b64d4 400
62375a60
NIS
401 if (CALL_FPTR(PL_threadhook)(aTHX)) {
402 /* Threads hook has vetoed further cleanup */
b47cad08 403 return STATUS_NATIVE_EXPORT;
62375a60
NIS
404 }
405
ff0cee69
PP
406 /* We must account for everything. */
407
408 /* Destroy the main CV and syntax tree */
3280af22 409 if (PL_main_root) {
4e380990
DM
410 /* ensure comppad/curpad to refer to main's pad */
411 if (CvPADLIST(PL_main_cv)) {
412 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
413 }
3280af22
NIS
414 op_free(PL_main_root);
415 PL_main_root = Nullop;
a0d0e21e 416 }
3280af22
NIS
417 PL_curcop = &PL_compiling;
418 PL_main_start = Nullop;
419 SvREFCNT_dec(PL_main_cv);
420 PL_main_cv = Nullcv;
24d3c518 421 PL_dirty = TRUE;
ff0cee69 422
13621cfb
NIS
423 /* Tell PerlIO we are about to tear things apart in case
424 we have layers which are using resources that should
425 be cleaned up now.
426 */
427
428 PerlIO_destruct(aTHX);
429
3280af22 430 if (PL_sv_objcount) {
a0d0e21e
LW
431 /*
432 * Try to destruct global references. We do this first so that the
433 * destructors and destructees still exist. Some sv's might remain.
434 * Non-referenced objects are on their own.
435 */
a0d0e21e 436 sv_clean_objs();
bf9cdc68 437 PL_sv_objcount = 0;
8990e307
LW
438 }
439
5cd24f17 440 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
441 SvREFCNT_dec(PL_warnhook);
442 PL_warnhook = Nullsv;
443 SvREFCNT_dec(PL_diehook);
444 PL_diehook = Nullsv;
5cd24f17 445
4b556e6c 446 /* call exit list functions */
3280af22 447 while (PL_exitlistlen-- > 0)
acfe0abc 448 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 449
3280af22 450 Safefree(PL_exitlist);
4b556e6c 451
1c4916e5
CB
452 PL_exitlist = NULL;
453 PL_exitlistlen = 0;
454
a0d0e21e 455 if (destruct_level == 0){
8990e307 456
a0d0e21e 457 DEBUG_P(debprofdump());
ac27b0f5 458
56a2bab7
NIS
459#if defined(PERLIO_LAYERS)
460 /* No more IO - including error messages ! */
461 PerlIO_cleanup(aTHX);
462#endif
463
a0d0e21e 464 /* The exit() function will do everything that needs doing. */
b47cad08 465 return STATUS_NATIVE_EXPORT;
a0d0e21e 466 }
5dd60ef7 467
551a8b83 468 /* jettison our possibly duplicated environment */
4b647fb0
DM
469 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
470 * so we certainly shouldn't free it here
471 */
2f42fcb0 472#ifndef PERL_MICRO
4b647fb0 473#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
50acdf95 474 if (environ != PL_origenviron && !PL_use_safe_putenv
4efc5df6
GS
475#ifdef USE_ITHREADS
476 /* only main thread can free environ[0] contents */
477 && PL_curinterp == aTHX
478#endif
479 )
480 {
551a8b83
JH
481 I32 i;
482
483 for (i = 0; environ[i]; i++)
4b420006 484 safesysfree(environ[i]);
0631ea03 485
4b420006
JH
486 /* Must use safesysfree() when working with environ. */
487 safesysfree(environ);
551a8b83
JH
488
489 environ = PL_origenviron;
490 }
491#endif
2f42fcb0 492#endif /* !PERL_MICRO */
551a8b83 493
804ffa60
DM
494 /* reset so print() ends up where we expect */
495 setdefout(Nullgv);
496
5f8cb046
DM
497#ifdef USE_ITHREADS
498 /* the syntax tree is shared between clones
499 * so op_free(PL_main_root) only ReREFCNT_dec's
500 * REGEXPs in the parent interpreter
501 * we need to manually ReREFCNT_dec for the clones
502 */
503 {
504 I32 i = AvFILLp(PL_regex_padav) + 1;
505 SV **ary = AvARRAY(PL_regex_padav);
506
507 while (i) {
35061a7e 508 SV *resv = ary[--i];
ba89bb6e 509 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM
510
511 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 512 /* this is PL_reg_curpm, already freed
35061a7e
DM
513 * flag is set in regexec.c:S_regtry
514 */
515 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 516 }
1cc8b4c5
AB
517 else if(SvREPADTMP(resv)) {
518 SvREPADTMP_off(resv);
519 }
35061a7e 520 else {
5f8cb046
DM
521 ReREFCNT_dec(re);
522 }
523 }
524 }
525 SvREFCNT_dec(PL_regex_padav);
526 PL_regex_padav = Nullav;
527 PL_regex_pad = NULL;
528#endif
529
081fc587
AB
530 SvREFCNT_dec((SV*) PL_stashcache);
531 PL_stashcache = NULL;
532
5f05dabc
PP
533 /* loosen bonds of global variables */
534
3280af22
NIS
535 if(PL_rsfp) {
536 (void)PerlIO_close(PL_rsfp);
537 PL_rsfp = Nullfp;
8ebc5c01
PP
538 }
539
540 /* Filters for program text */
3280af22
NIS
541 SvREFCNT_dec(PL_rsfp_filters);
542 PL_rsfp_filters = Nullav;
8ebc5c01
PP
543
544 /* switches */
3280af22
NIS
545 PL_preprocess = FALSE;
546 PL_minus_n = FALSE;
547 PL_minus_p = FALSE;
548 PL_minus_l = FALSE;
549 PL_minus_a = FALSE;
550 PL_minus_F = FALSE;
551 PL_doswitches = FALSE;
599cee73 552 PL_dowarn = G_WARN_OFF;
3280af22
NIS
553 PL_doextract = FALSE;
554 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
555 PL_unsafe = FALSE;
556
557 Safefree(PL_inplace);
558 PL_inplace = Nullch;
a7cb1f99 559 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
560
561 if (PL_e_script) {
562 SvREFCNT_dec(PL_e_script);
563 PL_e_script = Nullsv;
8ebc5c01
PP
564 }
565
bf9cdc68
RG
566 PL_perldb = 0;
567
8ebc5c01
PP
568 /* magical thingies */
569
7889fe52
NIS
570 SvREFCNT_dec(PL_ofs_sv); /* $, */
571 PL_ofs_sv = Nullsv;
5f05dabc 572
7889fe52
NIS
573 SvREFCNT_dec(PL_ors_sv); /* $\ */
574 PL_ors_sv = Nullsv;
8ebc5c01 575
3280af22
NIS
576 SvREFCNT_dec(PL_rs); /* $/ */
577 PL_rs = Nullsv;
dc92893f 578
d33b2eba
GS
579 PL_multiline = 0; /* $* */
580 Safefree(PL_osname); /* $^O */
581 PL_osname = Nullch;
5f05dabc 582
3280af22
NIS
583 SvREFCNT_dec(PL_statname);
584 PL_statname = Nullsv;
585 PL_statgv = Nullgv;
5f05dabc 586
8ebc5c01
PP
587 /* defgv, aka *_ should be taken care of elsewhere */
588
8ebc5c01 589 /* clean up after study() */
3280af22
NIS
590 SvREFCNT_dec(PL_lastscream);
591 PL_lastscream = Nullsv;
592 Safefree(PL_screamfirst);
593 PL_screamfirst = 0;
594 Safefree(PL_screamnext);
595 PL_screamnext = 0;
8ebc5c01 596
7d5ea4e7
GS
597 /* float buffer */
598 Safefree(PL_efloatbuf);
599 PL_efloatbuf = Nullch;
600 PL_efloatsize = 0;
601
8ebc5c01 602 /* startup and shutdown function lists */
3280af22 603 SvREFCNT_dec(PL_beginav);
5a837c8f 604 SvREFCNT_dec(PL_beginav_save);
3280af22 605 SvREFCNT_dec(PL_endav);
7d30b5c4 606 SvREFCNT_dec(PL_checkav);
ece599bd 607 SvREFCNT_dec(PL_checkav_save);
3280af22
NIS
608 SvREFCNT_dec(PL_initav);
609 PL_beginav = Nullav;
5a837c8f 610 PL_beginav_save = Nullav;
3280af22 611 PL_endav = Nullav;
7d30b5c4 612 PL_checkav = Nullav;
ece599bd 613 PL_checkav_save = Nullav;
3280af22 614 PL_initav = Nullav;
5618dfe8 615
8ebc5c01 616 /* shortcuts just get cleared */
3280af22 617 PL_envgv = Nullgv;
3280af22
NIS
618 PL_incgv = Nullgv;
619 PL_hintgv = Nullgv;
620 PL_errgv = Nullgv;
621 PL_argvgv = Nullgv;
622 PL_argvoutgv = Nullgv;
623 PL_stdingv = Nullgv;
bf49b057 624 PL_stderrgv = Nullgv;
3280af22
NIS
625 PL_last_in_gv = Nullgv;
626 PL_replgv = Nullgv;
bf9cdc68
RG
627 PL_DBgv = Nullgv;
628 PL_DBline = Nullgv;
629 PL_DBsub = Nullgv;
630 PL_DBsingle = Nullsv;
631 PL_DBtrace = Nullsv;
632 PL_DBsignal = Nullsv;
633 PL_DBassertion = Nullsv;
634 PL_DBcv = Nullcv;
635 PL_dbargs = Nullav;
5c831c24 636 PL_debstash = Nullhv;
8ebc5c01 637
7a1c5554
GS
638 SvREFCNT_dec(PL_argvout_stack);
639 PL_argvout_stack = Nullav;
8ebc5c01 640
5c831c24
GS
641 SvREFCNT_dec(PL_modglobal);
642 PL_modglobal = Nullhv;
643 SvREFCNT_dec(PL_preambleav);
644 PL_preambleav = Nullav;
645 SvREFCNT_dec(PL_subname);
646 PL_subname = Nullsv;
647 SvREFCNT_dec(PL_linestr);
648 PL_linestr = Nullsv;
649 SvREFCNT_dec(PL_pidstatus);
650 PL_pidstatus = Nullhv;
651 SvREFCNT_dec(PL_toptarget);
652 PL_toptarget = Nullsv;
653 SvREFCNT_dec(PL_bodytarget);
654 PL_bodytarget = Nullsv;
655 PL_formtarget = Nullsv;
656
d33b2eba 657 /* free locale stuff */
b9582b6a 658#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
659 Safefree(PL_collation_name);
660 PL_collation_name = Nullch;
b9582b6a 661#endif
d33b2eba 662
b9582b6a 663#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
664 Safefree(PL_numeric_name);
665 PL_numeric_name = Nullch;
a453c169 666 SvREFCNT_dec(PL_numeric_radix_sv);
bf9cdc68 667 PL_numeric_radix_sv = Nullsv;
b9582b6a 668#endif
d33b2eba 669
5c831c24
GS
670 /* clear utf8 character classes */
671 SvREFCNT_dec(PL_utf8_alnum);
672 SvREFCNT_dec(PL_utf8_alnumc);
673 SvREFCNT_dec(PL_utf8_ascii);
674 SvREFCNT_dec(PL_utf8_alpha);
675 SvREFCNT_dec(PL_utf8_space);
676 SvREFCNT_dec(PL_utf8_cntrl);
677 SvREFCNT_dec(PL_utf8_graph);
678 SvREFCNT_dec(PL_utf8_digit);
679 SvREFCNT_dec(PL_utf8_upper);
680 SvREFCNT_dec(PL_utf8_lower);
681 SvREFCNT_dec(PL_utf8_print);
682 SvREFCNT_dec(PL_utf8_punct);
683 SvREFCNT_dec(PL_utf8_xdigit);
684 SvREFCNT_dec(PL_utf8_mark);
685 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 686 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 687 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 688 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH
689 SvREFCNT_dec(PL_utf8_idstart);
690 SvREFCNT_dec(PL_utf8_idcont);
5c831c24
GS
691 PL_utf8_alnum = Nullsv;
692 PL_utf8_alnumc = Nullsv;
693 PL_utf8_ascii = Nullsv;
694 PL_utf8_alpha = Nullsv;
695 PL_utf8_space = Nullsv;
696 PL_utf8_cntrl = Nullsv;
697 PL_utf8_graph = Nullsv;
698 PL_utf8_digit = Nullsv;
699 PL_utf8_upper = Nullsv;
700 PL_utf8_lower = Nullsv;
701 PL_utf8_print = Nullsv;
702 PL_utf8_punct = Nullsv;
703 PL_utf8_xdigit = Nullsv;
704 PL_utf8_mark = Nullsv;
705 PL_utf8_toupper = Nullsv;
706 PL_utf8_totitle = Nullsv;
707 PL_utf8_tolower = Nullsv;
b4e400f9 708 PL_utf8_tofold = Nullsv;
82686b01
JH
709 PL_utf8_idstart = Nullsv;
710 PL_utf8_idcont = Nullsv;
5c831c24 711
971a9dd3
GS
712 if (!specialWARN(PL_compiling.cop_warnings))
713 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 714 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
715 if (!specialCopIO(PL_compiling.cop_io))
716 SvREFCNT_dec(PL_compiling.cop_io);
717 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS
718 CopFILE_free(&PL_compiling);
719 CopSTASH_free(&PL_compiling);
5c831c24 720
a0d0e21e 721 /* Prepare to destruct main symbol table. */
5f05dabc 722
3280af22
NIS
723 hv = PL_defstash;
724 PL_defstash = 0;
a0d0e21e 725 SvREFCNT_dec(hv);
5c831c24
GS
726 SvREFCNT_dec(PL_curstname);
727 PL_curstname = Nullsv;
a0d0e21e 728
5a844595
GS
729 /* clear queued errors */
730 SvREFCNT_dec(PL_errors);
731 PL_errors = Nullsv;
732
a0d0e21e 733 FREETMPS;
0453d815 734 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 735 if (PL_scopestack_ix != 0)
9014280d 736 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 737 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
738 (long)PL_scopestack_ix);
739 if (PL_savestack_ix != 0)
9014280d 740 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 741 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
742 (long)PL_savestack_ix);
743 if (PL_tmps_floor != -1)
9014280d 744 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 745 (long)PL_tmps_floor + 1);
a0d0e21e 746 if (cxstack_ix != -1)
9014280d 747 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 748 (long)cxstack_ix + 1);
a0d0e21e 749 }
8990e307
LW
750
751 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 752 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 753 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
754
755 /* the 2 is for PL_fdpid and PL_strtab */
756 while (PL_sv_count > 2 && sv_clean_all())
757 ;
758
d33b2eba
GS
759 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
760 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
761 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
762 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 763
d4777f27
GS
764 AvREAL_off(PL_fdpid); /* no surviving entries */
765 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
766 PL_fdpid = Nullav;
767
6c644e78
GS
768#ifdef HAVE_INTERP_INTERN
769 sys_intern_clear();
770#endif
771
6e72f9df
PP
772 /* Destruct the global string table. */
773 {
774 /* Yell and reset the HeVAL() slots that are still holding refcounts,
775 * so that sv_free() won't fail on them.
776 */
777 I32 riter;
778 I32 max;
779 HE *hent;
780 HE **array;
781
782 riter = 0;
3280af22
NIS
783 max = HvMAX(PL_strtab);
784 array = HvARRAY(PL_strtab);
6e72f9df
PP
785 hent = array[0];
786 for (;;) {
0453d815 787 if (hent && ckWARN_d(WARN_INTERNAL)) {
9014280d 788 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 789 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
790 HeVAL(hent) - Nullsv, HeKEY(hent));
791 HeVAL(hent) = Nullsv;
792 hent = HeNEXT(hent);
793 }
794 if (!hent) {
795 if (++riter > max)
796 break;
797 hent = array[riter];
798 }
799 }
800 }
3280af22 801 SvREFCNT_dec(PL_strtab);
6e72f9df 802
e652bb2f 803#ifdef USE_ITHREADS
a0739874
DM
804 /* free the pointer table used for cloning */
805 ptr_table_free(PL_ptr_table);
bf9cdc68 806 PL_ptr_table = (PTR_TBL_t*)NULL;
53186e96 807#endif
a0739874 808
d33b2eba
GS
809 /* free special SVs */
810
811 SvREFCNT(&PL_sv_yes) = 0;
812 sv_clear(&PL_sv_yes);
813 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 814 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
815
816 SvREFCNT(&PL_sv_no) = 0;
817 sv_clear(&PL_sv_no);
818 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 819 SvFLAGS(&PL_sv_no) = 0;
01724ea0 820
9f375a43
DM
821 {
822 int i;
823 for (i=0; i<=2; i++) {
824 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
825 sv_clear(PERL_DEBUG_PAD(i));
826 SvANY(PERL_DEBUG_PAD(i)) = NULL;
827 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
828 }
829 }
830
0453d815 831 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 832 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 833
eba0f806
DM
834#ifdef DEBUG_LEAKING_SCALARS
835 if (PL_sv_count != 0) {
836 SV* sva;
837 SV* sv;
838 register SV* svend;
839
840 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
841 svend = &sva[SvREFCNT(sva)];
842 for (sv = sva + 1; sv < svend; ++sv) {
843 if (SvTYPE(sv) != SVTYPEMASK) {
a548cda8
DM
844 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
845 " flags=0x08%"UVxf
846 " refcnt=%"UVuf pTHX__FORMAT "\n",
847 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE);
eba0f806
DM
848 }
849 }
850 }
851 }
852#endif
bf9cdc68 853 PL_sv_count = 0;
eba0f806
DM
854
855
56a2bab7 856#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
857 /* No more IO - including error messages ! */
858 PerlIO_cleanup(aTHX);
859#endif
860
9f4bd222
NIS
861 /* sv_undef needs to stay immortal until after PerlIO_cleanup
862 as currently layers use it rather than Nullsv as a marker
863 for no arg - and will try and SvREFCNT_dec it.
864 */
865 SvREFCNT(&PL_sv_undef) = 0;
866 SvREADONLY_off(&PL_sv_undef);
867
3280af22 868 Safefree(PL_origfilename);
bf9cdc68 869 PL_origfilename = Nullch;
3280af22 870 Safefree(PL_reg_start_tmp);
bf9cdc68
RG
871 PL_reg_start_tmp = (char**)NULL;
872 PL_reg_start_tmpl = 0;
5c5e4c24
IZ
873 if (PL_reg_curpm)
874 Safefree(PL_reg_curpm);
82ba1be6 875 Safefree(PL_reg_poscache);
dd28f7bb 876 free_tied_hv_pool();
3280af22 877 Safefree(PL_op_mask);
cf36064f 878 Safefree(PL_psig_ptr);
bf9cdc68 879 PL_psig_ptr = (SV**)NULL;
cf36064f 880 Safefree(PL_psig_name);
bf9cdc68 881 PL_psig_name = (SV**)NULL;
2c2666fc 882 Safefree(PL_bitcount);
bf9cdc68 883 PL_bitcount = Nullch;
ce08f86c 884 Safefree(PL_psig_pend);
bf9cdc68
RG
885 PL_psig_pend = (int*)NULL;
886 PL_formfeed = Nullsv;
887 Safefree(PL_ofmt);
888 PL_ofmt = Nullch;
6e72f9df 889 nuke_stacks();
bf9cdc68
RG
890 PL_tainting = FALSE;
891 PL_taint_warn = FALSE;
3280af22 892 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
bf9cdc68 893 PL_debug = 0;
ac27b0f5 894
a0d0e21e 895 DEBUG_P(debprofdump());
d33b2eba 896
e5dd39fc 897#ifdef USE_REENTRANT_API
10bc17b6 898 Perl_reentrant_free(aTHX);
e5dd39fc
AB
899#endif
900
612f20c3
GS
901 sv_free_arenas();
902
fc36a67e
PP
903 /* As the absolutely last thing, free the non-arena SV for mess() */
904
3280af22 905 if (PL_mess_sv) {
9c63abab
GS
906 /* it could have accumulated taint magic */
907 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
908 MAGIC* mg;
909 MAGIC* moremagic;
910 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
911 moremagic = mg->mg_moremagic;
14befaf4
DM
912 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
913 && mg->mg_len >= 0)
9c63abab
GS
914 Safefree(mg->mg_ptr);
915 Safefree(mg);
916 }
917 }
fc36a67e 918 /* we know that type >= SVt_PV */
0c34ef67 919 SvOOK_off(PL_mess_sv);
3280af22
NIS
920 Safefree(SvPVX(PL_mess_sv));
921 Safefree(SvANY(PL_mess_sv));
922 Safefree(PL_mess_sv);
923 PL_mess_sv = Nullsv;
fc36a67e 924 }
31d77e54 925 return STATUS_NATIVE_EXPORT;
79072805
LW
926}
927
954c1994
GS
928/*
929=for apidoc perl_free
930
931Releases a Perl interpreter. See L<perlembed>.
932
933=cut
934*/
935
79072805 936void
0cb96387 937perl_free(pTHXx)
79072805 938{
acfe0abc 939#if defined(WIN32) || defined(NETWARE)
ce3e5b80 940# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
941# ifdef NETWARE
942 void *host = nw_internal_host;
943# else
944 void *host = w32_internal_host;
945# endif
ce3e5b80 946 PerlMem_free(aTHXx);
acfe0abc 947# ifdef NETWARE
011f1a1a 948 nw_delete_internal_host(host);
acfe0abc
GS
949# else
950 win32_delete_internal_host(host);
951# endif
1c0ca838
GS
952# else
953 PerlMem_free(aTHXx);
954# endif
acfe0abc
GS
955#else
956 PerlMem_free(aTHXx);
76e3520e 957#endif
79072805
LW
958}
959
4b556e6c 960void
864dbfa3 961Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 962{
3280af22
NIS
963 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
964 PL_exitlist[PL_exitlistlen].fn = fn;
965 PL_exitlist[PL_exitlistlen].ptr = ptr;
966 ++PL_exitlistlen;
4b556e6c
JD
967}
968
954c1994
GS
969/*
970=for apidoc perl_parse
971
972Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
973
974=cut
975*/
976
79072805 977int
0cb96387 978perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 979{
6224f72b 980 I32 oldscope;
6224f72b 981 int ret;
db36c5a1 982 dJMPENV;
4d1ff10f 983#ifdef USE_5005THREADS
cea2e8a9
GS
984 dTHX;
985#endif
8d063cd8 986
a687059c
LW
987#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
988#ifdef IAMSUID
989#undef IAMSUID
cea2e8a9 990 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c 991setuid perl scripts securely.\n");
ae3f3efd 992#endif /* IAMSUID */
a687059c
LW
993#endif
994
b0891165
JH
995#if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
996 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
103dd899 997 * This MUST be done before any hash stores or fetches take place.
008fb0c0
NC
998 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
999 * yourself, it is your responsibility to provide a good random seed!
830b38bd 1000 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
008fb0c0
NC
1001 if (!PL_rehash_seed_set)
1002 PL_rehash_seed = get_hash_seed();
b0891165 1003 {
bed60192
JH
1004 char *s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1005
1006 if (s) {
1007 int i = atoi(s);
1008
1009 if (i == 1)
1010 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n",
008fb0c0 1011 PL_rehash_seed);
bed60192 1012 }
b0891165
JH
1013 }
1014#endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1015
3280af22 1016 PL_origargc = argc;
e2975953 1017 PL_origargv = argv;
a0d0e21e 1018
54bfe034 1019 {
3cb9023d
JH
1020 /* Set PL_origalen be the sum of the contiguous argv[]
1021 * elements plus the size of the env in case that it is
e9137a8e 1022 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
3cb9023d
JH
1023 * as the maximum modifiable length of $0. In the worst case
1024 * the area we are able to modify is limited to the size of
43c32782 1025 * the original argv[0]. (See below for 'contiguous', though.)
3cb9023d 1026 * --jhi */
84458fbf 1027 char *s = NULL;
54bfe034 1028 int i;
7d8e7db3
JH
1029 UV mask =
1030 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
43c32782
JH
1031 /* Do the mask check only if the args seem like aligned. */
1032 UV aligned =
1033 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1034
1035 /* See if all the arguments are contiguous in memory. Note
1036 * that 'contiguous' is a loose term because some platforms
1037 * align the argv[] and the envp[]. If the arguments look
1038 * like non-aligned, assume that they are 'strictly' or
1039 * 'traditionally' contiguous. If the arguments look like
1040 * aligned, we just check that they are within aligned
1041 * PTRSIZE bytes. As long as no system has something bizarre
1042 * like the argv[] interleaved with some other data, we are
1043 * fine. (Did I just evoke Murphy's Law?) --jhi */
c8941eeb
JH
1044 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1045 while (*s) s++;
1046 for (i = 1; i < PL_origargc; i++) {
1047 if ((PL_origargv[i] == s + 1
43c32782 1048#ifdef OS2
c8941eeb 1049 || PL_origargv[i] == s + 2
43c32782 1050#endif
c8941eeb
JH
1051 )
1052 ||
1053 (aligned &&
1054 (PL_origargv[i] > s &&
1055 PL_origargv[i] <=
1056 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1057 )
1058 {
1059 s = PL_origargv[i];
1060 while (*s) s++;
1061 }
1062 else
1063 break;
54bfe034 1064 }
54bfe034 1065 }
3cb9023d 1066 /* Can we grab env area too to be used as the area for $0? */
43c32782
JH
1067 if (PL_origenviron) {
1068 if ((PL_origenviron[0] == s + 1
1069#ifdef OS2
1070 || (PL_origenviron[0] == s + 9 && (s += 8))
1071#endif
1072 )
1073 ||
1074 (aligned &&
1075 (PL_origenviron[0] > s &&
1076 PL_origenviron[0] <=
1077 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1078 )
1079 {
1080#ifndef OS2
1081 s = PL_origenviron[0];
1082 while (*s) s++;
1083#endif
1084 my_setenv("NoNe SuCh", Nullch);
1085 /* Force copy of environment. */
1086 for (i = 1; PL_origenviron[i]; i++) {
1087 if (PL_origenviron[i] == s + 1
1088 ||
1089 (aligned &&
1090 (PL_origenviron[i] > s &&
1091 PL_origenviron[i] <=
1092 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1093 )
1094 {
1095 s = PL_origenviron[i];
1096 while (*s) s++;
1097 }
1098 else
1099 break;
54bfe034 1100 }
43c32782 1101 }
54bfe034 1102 }
284e1220 1103 PL_origalen = s - PL_origargv[0] + 1;
54bfe034
JH
1104 }
1105
3280af22 1106 if (PL_do_undump) {
a0d0e21e
LW
1107
1108 /* Come here if running an undumped a.out. */
1109
3280af22
NIS
1110 PL_origfilename = savepv(argv[0]);
1111 PL_do_undump = FALSE;
a0d0e21e 1112 cxstack_ix = -1; /* start label stack again */
748a9306 1113 init_ids();
a0d0e21e
LW
1114 init_postdump_symbols(argc,argv,env);
1115 return 0;
1116 }
1117
3280af22 1118 if (PL_main_root) {
3280af22
NIS
1119 op_free(PL_main_root);
1120 PL_main_root = Nullop;
ff0cee69 1121 }
3280af22
NIS
1122 PL_main_start = Nullop;
1123 SvREFCNT_dec(PL_main_cv);
1124 PL_main_cv = Nullcv;
79072805 1125
3280af22
NIS
1126 time(&PL_basetime);
1127 oldscope = PL_scopestack_ix;
599cee73 1128 PL_dowarn = G_WARN_OFF;
f86702cc 1129
14dd3ad8
GS
1130#ifdef PERL_FLEXIBLE_EXCEPTIONS
1131 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
1132#else
1133 JMPENV_PUSH(ret);
1134#endif
6224f72b 1135 switch (ret) {
312caa8e 1136 case 0:
14dd3ad8
GS
1137#ifndef PERL_FLEXIBLE_EXCEPTIONS
1138 parse_body(env,xsinit);
1139#endif
7d30b5c4
GS
1140 if (PL_checkav)
1141 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1142 ret = 0;
1143 break;
6224f72b
GS
1144 case 1:
1145 STATUS_ALL_FAILURE;
1146 /* FALL THROUGH */
1147 case 2:
1148 /* my_exit() was called */
3280af22 1149 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1150 LEAVE;
1151 FREETMPS;
3280af22 1152 PL_curstash = PL_defstash;
7d30b5c4
GS
1153 if (PL_checkav)
1154 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1155 ret = STATUS_NATIVE_EXPORT;
1156 break;
6224f72b 1157 case 3:
bf49b057 1158 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1159 ret = 1;
1160 break;
6224f72b 1161 }
14dd3ad8
GS
1162 JMPENV_POP;
1163 return ret;
1164}
1165
1166#ifdef PERL_FLEXIBLE_EXCEPTIONS
1167STATIC void *
1168S_vparse_body(pTHX_ va_list args)
1169{
1170 char **env = va_arg(args, char**);
1171 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1172
1173 return parse_body(env, xsinit);
312caa8e 1174}
14dd3ad8 1175#endif
312caa8e
CS
1176
1177STATIC void *
14dd3ad8 1178S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1179{
312caa8e
CS
1180 int argc = PL_origargc;
1181 char **argv = PL_origargv;
312caa8e 1182 char *scriptname = NULL;
312caa8e
CS
1183 VOL bool dosearch = FALSE;
1184 char *validarg = "";
312caa8e
CS
1185 register SV *sv;
1186 register char *s;
cf756827 1187 char *cddir = Nullch;
312caa8e 1188
ae3f3efd
PS
1189 PL_fdscript = -1;
1190 PL_suidscript = -1;
3280af22 1191 sv_setpvn(PL_linestr,"",0);
79cb57f6 1192 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1193 SAVEFREESV(sv);
1194 init_main_stash();
54310121 1195
6224f72b
GS
1196 for (argc--,argv++; argc > 0; argc--,argv++) {
1197 if (argv[0][0] != '-' || !argv[0][1])
1198 break;
1199#ifdef DOSUID
1200 if (*validarg)
1201 validarg = " PHOOEY ";
1202 else
1203 validarg = argv[0];
ae3f3efd
PS
1204 /*
1205 * Can we rely on the kernel to start scripts with argv[1] set to
1206 * contain all #! line switches (the whole line)? (argv[0] is set to
1207 * the interpreter name, argv[2] to the script name; argv[3] and
1208 * above may contain other arguments.)
1209 */
13281fa4 1210#endif
6224f72b
GS
1211 s = argv[0]+1;
1212 reswitch:
1213 switch (*s) {
729a02f2 1214 case 'C':
1d5472a9
GS
1215#ifndef PERL_STRICT_CR
1216 case '\r':
1217#endif
6224f72b
GS
1218 case ' ':
1219 case '0':
1220 case 'F':
1221 case 'a':
1222 case 'c':
1223 case 'd':
1224 case 'D':
1225 case 'h':
1226 case 'i':
1227 case 'l':
1228 case 'M':
1229 case 'm':
1230 case 'n':
1231 case 'p':
1232 case 's':
1233 case 'u':
1234 case 'U':
1235 case 'v':
599cee73
PM
1236 case 'W':
1237 case 'X':
6224f72b 1238 case 'w':
06492da6 1239 case 'A':
155aba94 1240 if ((s = moreswitches(s)))
6224f72b
GS
1241 goto reswitch;
1242 break;
33b78306 1243
1dbad523 1244 case 't':
22f7c9c9 1245 CHECK_MALLOC_TOO_LATE_FOR('t');
317ea90d
MS
1246 if( !PL_tainting ) {
1247 PL_taint_warn = TRUE;
1248 PL_tainting = TRUE;
1249 }
1250 s++;
1251 goto reswitch;
6224f72b 1252 case 'T':
22f7c9c9 1253 CHECK_MALLOC_TOO_LATE_FOR('T');
3280af22 1254 PL_tainting = TRUE;
317ea90d 1255 PL_taint_warn = FALSE;
6224f72b
GS
1256 s++;
1257 goto reswitch;
f86702cc 1258
6224f72b 1259 case 'e':
bf4acbe4
GS
1260#ifdef MACOS_TRADITIONAL
1261 /* ignore -e for Dev:Pseudo argument */
1262 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
e55ac0fa 1263 break;
bf4acbe4 1264#endif
ae3f3efd 1265 forbid_setid("-e");
3280af22 1266 if (!PL_e_script) {
79cb57f6 1267 PL_e_script = newSVpvn("",0);
0cb96387 1268 filter_add(read_e_script, NULL);
6224f72b
GS
1269 }
1270 if (*++s)
3280af22 1271 sv_catpv(PL_e_script, s);
6224f72b 1272 else if (argv[1]) {
3280af22 1273 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1274 argc--,argv++;
1275 }
1276 else
cea2e8a9 1277 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1278 sv_catpv(PL_e_script, "\n");
6224f72b 1279 break;
afe37c7d 1280
6224f72b
GS
1281 case 'I': /* -I handled both here and in moreswitches() */
1282 forbid_setid("-I");
1283 if (!*++s && (s=argv[1]) != Nullch) {
1284 argc--,argv++;
1285 }
6224f72b 1286 if (s && *s) {
0df16ed7
GS
1287 char *p;
1288 STRLEN len = strlen(s);
1289 p = savepvn(s, len);
574c798a 1290 incpush(p, TRUE, TRUE, FALSE);
0df16ed7
GS
1291 sv_catpvn(sv, "-I", 2);
1292 sv_catpvn(sv, p, len);
1293 sv_catpvn(sv, " ", 1);
6224f72b 1294 Safefree(p);
0df16ed7
GS
1295 }
1296 else
a67e862a 1297 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1298 break;
1299 case 'P':
1300 forbid_setid("-P");
3280af22 1301 PL_preprocess = TRUE;
6224f72b
GS
1302 s++;
1303 goto reswitch;
1304 case 'S':
1305 forbid_setid("-S");
1306 dosearch = TRUE;
1307 s++;
1308 goto reswitch;
1309 case 'V':
3280af22
NIS
1310 if (!PL_preambleav)
1311 PL_preambleav = newAV();
1312 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1313 if (*++s != ':') {
3280af22 1314 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1315#ifdef VMS
6b88bc9c 1316 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1317#else
3280af22 1318 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1319#endif
3280af22 1320 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1321# ifdef DEBUGGING
3280af22 1322 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1323# endif
6224f72b 1324# ifdef MULTIPLICITY
8f872242 1325 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1326# endif
4d1ff10f
AB
1327# ifdef USE_5005THREADS
1328 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1329# endif
ac5e8965
JH
1330# ifdef USE_ITHREADS
1331 sv_catpv(PL_Sv," USE_ITHREADS");
1332# endif
10cc9d2a
JH
1333# ifdef USE_64_BIT_INT
1334 sv_catpv(PL_Sv," USE_64_BIT_INT");
1335# endif
1336# ifdef USE_64_BIT_ALL
1337 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1338# endif
1339# ifdef USE_LONG_DOUBLE
1340 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1341# endif
53430762
JH
1342# ifdef USE_LARGE_FILES
1343 sv_catpv(PL_Sv," USE_LARGE_FILES");
1344# endif
ac5e8965
JH
1345# ifdef USE_SOCKS
1346 sv_catpv(PL_Sv," USE_SOCKS");
1347# endif
b363f7ed
GS
1348# ifdef PERL_IMPLICIT_CONTEXT
1349 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1350# endif
1351# ifdef PERL_IMPLICIT_SYS
1352 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1353# endif
3280af22 1354 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1355
6224f72b
GS
1356#if defined(LOCAL_PATCH_COUNT)
1357 if (LOCAL_PATCH_COUNT > 0) {
1358 int i;
3280af22 1359 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1360 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1361 if (PL_localpatches[i])
acb03d05
AB
1362 Perl_sv_catpvf(aTHX_ PL_Sv,"q%c\t%s\n%c,",
1363 0, PL_localpatches[i], 0);
6224f72b
GS
1364 }
1365 }
1366#endif
cea2e8a9 1367 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1368#ifdef __DATE__
1369# ifdef __TIME__
cea2e8a9 1370 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1371# else
cea2e8a9 1372 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1373# endif
1374#endif
3280af22 1375 sv_catpv(PL_Sv, "; \
6224f72b 1376$\"=\"\\n \"; \
69fcd688
JH
1377@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1378#ifdef __CYGWIN__
1379 sv_catpv(PL_Sv,"\
1380push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1381#endif
1382 sv_catpv(PL_Sv, "\
6224f72b
GS
1383print \" \\%ENV:\\n @env\\n\" if @env; \
1384print \" \\@INC:\\n @INC\\n\";");
1385 }
1386 else {
3280af22
NIS
1387 PL_Sv = newSVpv("config_vars(qw(",0);
1388 sv_catpv(PL_Sv, ++s);
1389 sv_catpv(PL_Sv, "))");
6224f72b
GS
1390 s += strlen(s);
1391 }
3280af22 1392 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1393 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1394 goto reswitch;
1395 case 'x':
3280af22 1396 PL_doextract = TRUE;
6224f72b
GS
1397 s++;
1398 if (*s)
f4c556ac 1399 cddir = s;
6224f72b
GS
1400 break;
1401 case 0:
1402 break;
1403 case '-':
1404 if (!*++s || isSPACE(*s)) {
1405 argc--,argv++;
1406 goto switch_end;
1407 }
1408 /* catch use of gnu style long options */
1409 if (strEQ(s, "version")) {
1410 s = "v";
1411 goto reswitch;
1412 }
1413 if (strEQ(s, "help")) {
1414 s = "h";
1415 goto reswitch;
1416 }
1417 s--;
1418 /* FALL THROUGH */
1419 default:
cea2e8a9 1420 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1421 }
1422 }
6224f72b 1423 switch_end:
54310121 1424
f675dbe5
CB
1425 if (
1426#ifndef SECURE_INTERNAL_GETENV
1427 !PL_tainting &&
1428#endif
cf756827 1429 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1430 {
cf756827 1431 char *popt = s;
74288ac8
GS
1432 while (isSPACE(*s))
1433 s++;
317ea90d 1434 if (*s == '-' && *(s+1) == 'T') {
22f7c9c9 1435 CHECK_MALLOC_TOO_LATE_FOR('T');
74288ac8 1436 PL_tainting = TRUE;
317ea90d
MS
1437 PL_taint_warn = FALSE;
1438 }
74288ac8 1439 else {
cf756827 1440 char *popt_copy = Nullch;
74288ac8 1441 while (s && *s) {
4ea8f8fb 1442 char *d;
74288ac8
GS
1443 while (isSPACE(*s))
1444 s++;
1445 if (*s == '-') {
1446 s++;
1447 if (isSPACE(*s))
1448 continue;
1449 }
4ea8f8fb 1450 d = s;
74288ac8
GS
1451 if (!*s)
1452 break;
06492da6 1453 if (!strchr("DIMUdmtwA", *s))
cea2e8a9 1454 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1455 while (++s && *s) {
1456 if (isSPACE(*s)) {
cf756827
GS
1457 if (!popt_copy) {
1458 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1459 s = popt_copy + (s - popt);
1460 d = popt_copy + (d - popt);
1461 }
4ea8f8fb
MS
1462 *s++ = '\0';
1463 break;
1464 }
1465 }
1c4db469 1466 if (*d == 't') {
317ea90d
MS
1467 if( !PL_tainting ) {
1468 PL_taint_warn = TRUE;
1469 PL_tainting = TRUE;
1470 }
1c4db469
RGS
1471 } else {
1472 moreswitches(d);
1473 }
6224f72b 1474 }
6224f72b
GS
1475 }
1476 }
a0d0e21e 1477
317ea90d
MS
1478 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1479 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1480 }
1481
6224f72b
GS
1482 if (!scriptname)
1483 scriptname = argv[0];
3280af22 1484 if (PL_e_script) {
6224f72b
GS
1485 argc++,argv--;
1486 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1487 }
1488 else if (scriptname == Nullch) {
1489#ifdef MSDOS
1490 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1491 moreswitches("h");
1492#endif
1493 scriptname = "-";
1494 }
1495
1496 init_perllib();
1497
c5cccb17 1498 open_script(scriptname,dosearch,sv);
6224f72b 1499
c5cccb17 1500 validate_suid(validarg, scriptname);
6224f72b 1501
64ca3a65 1502#ifndef PERL_MICRO
0b5b802d
GS
1503#if defined(SIGCHLD) || defined(SIGCLD)
1504 {
1505#ifndef SIGCHLD
1506# define SIGCHLD SIGCLD
1507#endif
1508 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1509 if (sigstate == SIG_IGN) {
1510 if (ckWARN(WARN_SIGNAL))
9014280d 1511 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
0b5b802d
GS
1512 "Can't ignore signal CHLD, forcing to default");
1513 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1514 }
1515 }
1516#endif
64ca3a65 1517#endif
0b5b802d 1518
bf4acbe4
GS
1519#ifdef MACOS_TRADITIONAL
1520 if (PL_doextract || gMacPerl_AlwaysExtract) {
1521#else
f4c556ac 1522 if (PL_doextract) {
bf4acbe4 1523#endif
6224f72b 1524 find_beginning();
f4c556ac
GS
1525 if (cddir && PerlDir_chdir(cddir) < 0)
1526 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1527
1528 }
6224f72b 1529
3280af22
NIS
1530 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1531 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1532 CvUNIQUE_on(PL_compcv);
1533
dd2155a4 1534 CvPADLIST(PL_compcv) = pad_new(0);
4d1ff10f 1535#ifdef USE_5005THREADS
533c011a
NIS
1536 CvOWNER(PL_compcv) = 0;
1537 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1538 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1539#endif /* USE_5005THREADS */
6224f72b 1540
0c4f7ff0 1541 boot_core_PerlIO();
6224f72b 1542 boot_core_UNIVERSAL();
09bef843 1543 boot_core_xsutils();
6224f72b
GS
1544
1545 if (xsinit)
acfe0abc 1546 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1547#ifndef PERL_MICRO
ed79a026 1548#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1549 init_os_extras();
6224f72b 1550#endif
64ca3a65 1551#endif
6224f72b 1552
29209bc5 1553#ifdef USE_SOCKS
1b9c9cf5
DH
1554# ifdef HAS_SOCKS5_INIT
1555 socks5_init(argv[0]);
1556# else
29209bc5 1557 SOCKSinit(argv[0]);
1b9c9cf5 1558# endif
ac27b0f5 1559#endif
29209bc5 1560
6224f72b
GS
1561 init_predump_symbols();
1562 /* init_postdump_symbols not currently designed to be called */
1563 /* more than once (ENV isn't cleared first, for example) */
1564 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1565 if (!PL_do_undump)
6224f72b
GS
1566 init_postdump_symbols(argc,argv,env);
1567
a05d7ebb
JH
1568 /* PL_unicode is turned on by -C or by $ENV{PERL_UNICODE}.
1569 * PL_utf8locale is conditionally turned on by
085a54d9 1570 * locale.c:Perl_init_i18nl10n() if the environment
a05d7ebb 1571 * look like the user wants to use UTF-8. */
06e66572
JH
1572 if (PL_unicode) {
1573 /* Requires init_predump_symbols(). */
a05d7ebb 1574 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
06e66572
JH
1575 IO* io;
1576 PerlIO* fp;
1577 SV* sv;
1578
a05d7ebb 1579 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
06e66572 1580 * and the default open disciplines. */
a05d7ebb
JH
1581 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
1582 PL_stdingv && (io = GvIO(PL_stdingv)) &&
1583 (fp = IoIFP(io)))
1584 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1585 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
1586 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
1587 (fp = IoOFP(io)))
1588 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1589 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
1590 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
1591 (fp = IoOFP(io)))
1592 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1593 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
1594 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1595 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
1596 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
1597 if (in) {
1598 if (out)
1599 sv_setpvn(sv, ":utf8\0:utf8", 11);
1600 else
1601 sv_setpvn(sv, ":utf8\0", 6);
1602 }
1603 else if (out)
1604 sv_setpvn(sv, "\0:utf8", 6);
1605 SvSETMAGIC(sv);
1606 }
b310b053
JH
1607 }
1608 }
1609
4ffa73a3
JH
1610 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
1611 if (strEQ(s, "unsafe"))
1612 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
1613 else if (strEQ(s, "safe"))
1614 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
1615 else
1616 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
1617 }
1618
6224f72b
GS
1619 init_lexer();
1620
1621 /* now parse the script */
1622
93189314 1623 SETERRNO(0,SS_NORMAL);
3280af22 1624 PL_error_count = 0;
bf4acbe4
GS
1625#ifdef MACOS_TRADITIONAL
1626 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1627 if (PL_minus_c)
1628 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1629 else {
1630 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1631 MacPerl_MPWFileName(PL_origfilename));
1632 }
1633 }
1634#else
3280af22
NIS
1635 if (yyparse() || PL_error_count) {
1636 if (PL_minus_c)
cea2e8a9 1637 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1638 else {
cea2e8a9 1639 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1640 PL_origfilename);
6224f72b
GS
1641 }
1642 }
bf4acbe4 1643#endif
57843af0 1644 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1645 PL_curstash = PL_defstash;
1646 PL_preprocess = FALSE;
1647 if (PL_e_script) {
1648 SvREFCNT_dec(PL_e_script);
1649 PL_e_script = Nullsv;
6224f72b
GS
1650 }
1651
3280af22 1652 if (PL_do_undump)
6224f72b
GS
1653 my_unexec();
1654
57843af0
GS
1655 if (isWARN_ONCE) {
1656 SAVECOPFILE(PL_curcop);
1657 SAVECOPLINE(PL_curcop);
3280af22 1658 gv_check(PL_defstash);
57843af0 1659 }
6224f72b
GS
1660
1661 LEAVE;
1662 FREETMPS;
1663
1664#ifdef MYMALLOC
1665 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1666 dump_mstats("after compilation:");
1667#endif
1668
1669 ENTER;
3280af22 1670 PL_restartop = 0;
312caa8e 1671 return NULL;
6224f72b
GS
1672}
1673
954c1994
GS
1674/*
1675=for apidoc perl_run
1676
1677Tells a Perl interpreter to run. See L<perlembed>.
1678
1679=cut
1680*/
1681
6224f72b 1682int
0cb96387 1683perl_run(pTHXx)
6224f72b 1684{
6224f72b 1685 I32 oldscope;
14dd3ad8 1686 int ret = 0;
db36c5a1 1687 dJMPENV;
4d1ff10f 1688#ifdef USE_5005THREADS
cea2e8a9
GS
1689 dTHX;
1690#endif
6224f72b 1691
3280af22 1692 oldscope = PL_scopestack_ix;
96e176bf
CL
1693#ifdef VMS
1694 VMSISH_HUSHED = 0;
1695#endif
6224f72b 1696
14dd3ad8 1697#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1698 redo_body:
14dd3ad8
GS
1699 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1700#else
1701 JMPENV_PUSH(ret);
1702#endif
6224f72b
GS
1703 switch (ret) {
1704 case 1:
1705 cxstack_ix = -1; /* start context stack again */
312caa8e 1706 goto redo_body;
14dd3ad8
GS
1707 case 0: /* normal completion */
1708#ifndef PERL_FLEXIBLE_EXCEPTIONS
1709 redo_body:
1710 run_body(oldscope);
1711#endif
1712 /* FALL THROUGH */
1713 case 2: /* my_exit() */
3280af22 1714 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1715 LEAVE;
1716 FREETMPS;
3280af22 1717 PL_curstash = PL_defstash;
3a1ee7e8 1718 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
1719 PL_endav && !PL_minus_c)
1720 call_list(oldscope, PL_endav);
6224f72b
GS
1721#ifdef MYMALLOC
1722 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1723 dump_mstats("after execution: ");
1724#endif
14dd3ad8
GS
1725 ret = STATUS_NATIVE_EXPORT;
1726 break;
6224f72b 1727 case 3:
312caa8e
CS
1728 if (PL_restartop) {
1729 POPSTACK_TO(PL_mainstack);
1730 goto redo_body;
6224f72b 1731 }
bf49b057 1732 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1733 FREETMPS;
14dd3ad8
GS
1734 ret = 1;
1735 break;
6224f72b
GS
1736 }
1737
14dd3ad8
GS
1738 JMPENV_POP;
1739 return ret;
312caa8e
CS
1740}
1741
14dd3ad8 1742#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 1743STATIC void *
14dd3ad8 1744S_vrun_body(pTHX_ va_list args)
312caa8e 1745{
312caa8e
CS
1746 I32 oldscope = va_arg(args, I32);
1747
14dd3ad8
GS
1748 return run_body(oldscope);
1749}
1750#endif
1751
1752
1753STATIC void *
1754S_run_body(pTHX_ I32 oldscope)
1755{
6224f72b 1756 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1757 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1758
3280af22 1759 if (!PL_restartop) {
6224f72b 1760 DEBUG_x(dump_all());
ecae49c0
NC
1761 if (!DEBUG_q_TEST)
1762 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1763 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1764 PTR2UV(thr)));
6224f72b 1765
3280af22 1766 if (PL_minus_c) {
bf4acbe4 1767#ifdef MACOS_TRADITIONAL
e69a2255
JH
1768 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
1769 (gMacPerl_ErrorFormat ? "# " : ""),
1770 MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1771#else
bf49b057 1772 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1773#endif
6224f72b
GS
1774 my_exit(0);
1775 }
3280af22 1776 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1777 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1778 if (PL_initav)
1779 call_list(oldscope, PL_initav);
6224f72b
GS
1780 }
1781
1782 /* do it */
1783
3280af22 1784 if (PL_restartop) {
533c011a 1785 PL_op = PL_restartop;
3280af22 1786 PL_restartop = 0;
cea2e8a9 1787 CALLRUNOPS(aTHX);
6224f72b 1788 }
3280af22
NIS
1789 else if (PL_main_start) {
1790 CvDEPTH(PL_main_cv) = 1;
533c011a 1791 PL_op = PL_main_start;
cea2e8a9 1792 CALLRUNOPS(aTHX);
6224f72b
GS
1793 }
1794
f6b3007c
JH
1795 my_exit(0);
1796 /* NOTREACHED */
312caa8e 1797 return NULL;
6224f72b
GS
1798}
1799
954c1994 1800/*
ccfc67b7
JH
1801=head1 SV Manipulation Functions
1802
954c1994
GS
1803=for apidoc p||get_sv
1804
1805Returns the SV of the specified Perl scalar. If C<create> is set and the
1806Perl variable does not exist then it will be created. If C<create> is not
1807set and the variable does not exist then NULL is returned.
1808
1809=cut
1810*/
1811
6224f72b 1812SV*
864dbfa3 1813Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1814{
1815 GV *gv;
4d1ff10f 1816#ifdef USE_5005THREADS
6224f72b
GS
1817 if (name[1] == '\0' && !isALPHA(name[0])) {
1818 PADOFFSET tmp = find_threadsv(name);
411caa50 1819 if (tmp != NOT_IN_PAD)
6224f72b 1820 return THREADSV(tmp);
6224f72b 1821 }
4d1ff10f 1822#endif /* USE_5005THREADS */
6224f72b
GS
1823 gv = gv_fetchpv(name, create, SVt_PV);
1824 if (gv)
1825 return GvSV(gv);
1826 return Nullsv;
1827}
1828
954c1994 1829/*
ccfc67b7
JH
1830=head1 Array Manipulation Functions
1831
954c1994
GS
1832=for apidoc p||get_av
1833
1834Returns the AV of the specified Perl array. If C<create> is set and the
1835Perl variable does not exist then it will be created. If C<create> is not
1836set and the variable does not exist then NULL is returned.
1837
1838=cut
1839*/
1840
6224f72b 1841AV*
864dbfa3 1842Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1843{
1844 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1845 if (create)
1846 return GvAVn(gv);
1847 if (gv)
1848 return GvAV(gv);
1849 return Nullav;
1850}
1851
954c1994 1852/*
ccfc67b7
JH
1853=head1 Hash Manipulation Functions
1854
954c1994
GS
1855=for apidoc p||get_hv
1856
1857Returns the HV of the specified Perl hash. If C<create> is set and the
1858Perl variable does not exist then it will be created. If C<create> is not
1859set and the variable does not exist then NULL is returned.
1860
1861=cut
1862*/
1863
6224f72b 1864HV*
864dbfa3 1865Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1866{
a0d0e21e
LW
1867 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1868 if (create)
1869 return GvHVn(gv);
1870 if (gv)
1871 return GvHV(gv);
1872 return Nullhv;
1873}
1874
954c1994 1875/*
ccfc67b7
JH
1876=head1 CV Manipulation Functions
1877
954c1994
GS
1878=for apidoc p||get_cv
1879
1880Returns the CV of the specified Perl subroutine. If C<create> is set and
1881the Perl subroutine does not exist then it will be declared (which has the
1882same effect as saying C<sub name;>). If C<create> is not set and the
1883subroutine does not exist then NULL is returned.
1884
1885=cut
1886*/
1887
a0d0e21e 1888CV*
864dbfa3 1889Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
1890{
1891 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 1892 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
1893 /* XXX this is probably not what they think they're getting.
1894 * It has the same effect as "sub name;", i.e. just a forward
1895 * declaration! */
8ebc5c01 1896 if (create && !GvCVu(gv))
774d564b 1897 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 1898 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 1899 Nullop,
a0d0e21e
LW
1900 Nullop);
1901 if (gv)
8ebc5c01 1902 return GvCVu(gv);
a0d0e21e
LW
1903 return Nullcv;
1904}
1905
79072805
LW
1906/* Be sure to refetch the stack pointer after calling these routines. */
1907
954c1994 1908/*
ccfc67b7
JH
1909
1910=head1 Callback Functions
1911
954c1994
GS
1912=for apidoc p||call_argv
1913
1914Performs a callback to the specified Perl sub. See L<perlcall>.
1915
1916=cut
1917*/
1918
a0d0e21e 1919I32
864dbfa3 1920Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 1921
8ac85365
NIS
1922 /* See G_* flags in cop.h */
1923 /* null terminated arg list */
8990e307 1924{
a0d0e21e 1925 dSP;
8990e307 1926
924508f0 1927 PUSHMARK(SP);
a0d0e21e 1928 if (argv) {
8990e307 1929 while (*argv) {
a0d0e21e 1930 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
1931 argv++;
1932 }
a0d0e21e 1933 PUTBACK;
8990e307 1934 }
864dbfa3 1935 return call_pv(sub_name, flags);
8990e307
LW
1936}
1937
954c1994
GS
1938/*
1939=for apidoc p||call_pv
1940
1941Performs a callback to the specified Perl sub. See L<perlcall>.
1942
1943=cut
1944*/
1945
a0d0e21e 1946I32
864dbfa3 1947Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
1948 /* name of the subroutine */
1949 /* See G_* flags in cop.h */
a0d0e21e 1950{
864dbfa3 1951 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
1952}
1953
954c1994
GS
1954/*
1955=for apidoc p||call_method
1956
1957Performs a callback to the specified Perl method. The blessed object must
1958be on the stack. See L<perlcall>.
1959
1960=cut
1961*/
1962
a0d0e21e 1963I32
864dbfa3 1964Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
1965 /* name of the subroutine */
1966 /* See G_* flags in cop.h */
a0d0e21e 1967{
968b3946 1968 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
1969}
1970
1971/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
1972/*
1973=for apidoc p||call_sv
1974
1975Performs a callback to the Perl sub whose name is in the SV. See
1976L<perlcall>.
1977
1978=cut
1979*/
1980
a0d0e21e 1981I32
864dbfa3 1982Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 1983 /* See G_* flags in cop.h */
a0d0e21e 1984{
924508f0 1985 dSP;
a0d0e21e 1986 LOGOP myop; /* fake syntax tree node */
968b3946 1987 UNOP method_op;
aa689395 1988 I32 oldmark;
13689cfe 1989 volatile I32 retval = 0;
a0d0e21e 1990 I32 oldscope;
54310121 1991 bool oldcatch = CATCH_GET;
6224f72b 1992 int ret;
533c011a 1993 OP* oldop = PL_op;
db36c5a1 1994 dJMPENV;
1e422769 1995
a0d0e21e
LW
1996 if (flags & G_DISCARD) {
1997 ENTER;
1998 SAVETMPS;
1999 }
2000
aa689395 2001 Zero(&myop, 1, LOGOP);
54310121 2002 myop.op_next = Nullop;
f51d4af5 2003 if (!(flags & G_NOARGS))
aa689395 2004 myop.op_flags |= OPf_STACKED;
54310121
PP
2005 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2006 (flags & G_ARRAY) ? OPf_WANT_LIST :
2007 OPf_WANT_SCALAR);
462e5cf6 2008 SAVEOP();
533c011a 2009 PL_op = (OP*)&myop;
aa689395 2010
3280af22
NIS
2011 EXTEND(PL_stack_sp, 1);
2012 *++PL_stack_sp = sv;
aa689395 2013 oldmark = TOPMARK;
3280af22 2014 oldscope = PL_scopestack_ix;
a0d0e21e 2015
3280af22 2016 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 2017 /* Handle first BEGIN of -d. */
3280af22 2018 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
2019 /* Try harder, since this may have been a sighandler, thus
2020 * curstash may be meaningless. */
3280af22 2021 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 2022 && !(flags & G_NODEBUG))
533c011a 2023 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 2024
968b3946
GS
2025 if (flags & G_METHOD) {
2026 Zero(&method_op, 1, UNOP);
2027 method_op.op_next = PL_op;
2028 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2029 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 2030 PL_op = (OP*)&method_op;
968b3946
GS
2031 }
2032
312caa8e 2033 if (!(flags & G_EVAL)) {
0cdb2077 2034 CATCH_SET(TRUE);
14dd3ad8 2035 call_body((OP*)&myop, FALSE);
312caa8e 2036 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 2037 CATCH_SET(oldcatch);
312caa8e
CS
2038 }
2039 else {
d78bda3d 2040 myop.op_other = (OP*)&myop;
3280af22 2041 PL_markstack_ptr--;
4633a7c4
LW
2042 /* we're trying to emulate pp_entertry() here */
2043 {
c09156bb 2044 register PERL_CONTEXT *cx;
54310121 2045 I32 gimme = GIMME_V;
ac27b0f5 2046
4633a7c4
LW
2047 ENTER;
2048 SAVETMPS;
ac27b0f5 2049
1d76a5c3 2050 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 2051 PUSHEVAL(cx, 0, 0);
533c011a 2052 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 2053
faef0170 2054 PL_in_eval = EVAL_INEVAL;
4633a7c4 2055 if (flags & G_KEEPERR)
faef0170 2056 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 2057 else
38a03e6e 2058 sv_setpv(ERRSV,"");
4633a7c4 2059 }
3280af22 2060 PL_markstack_ptr++;
a0d0e21e 2061
14dd3ad8
GS
2062#ifdef PERL_FLEXIBLE_EXCEPTIONS
2063 redo_body:
2064 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2065 (OP*)&myop, FALSE);
14dd3ad8
GS
2066#else
2067 JMPENV_PUSH(ret);
2068#endif
6224f72b
GS
2069 switch (ret) {
2070 case 0:
14dd3ad8
GS
2071#ifndef PERL_FLEXIBLE_EXCEPTIONS
2072 redo_body:
2073 call_body((OP*)&myop, FALSE);
2074#endif
312caa8e
CS
2075 retval = PL_stack_sp - (PL_stack_base + oldmark);
2076 if (!(flags & G_KEEPERR))
2077 sv_setpv(ERRSV,"");
a0d0e21e 2078 break;
6224f72b 2079 case 1:
f86702cc 2080 STATUS_ALL_FAILURE;
a0d0e21e 2081 /* FALL THROUGH */
6224f72b 2082 case 2:
a0d0e21e 2083 /* my_exit() was called */
3280af22 2084 PL_curstash = PL_defstash;
a0d0e21e 2085 FREETMPS;
14dd3ad8 2086 JMPENV_POP;
cc3604b1 2087 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2088 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2089 my_exit_jump();
a0d0e21e 2090 /* NOTREACHED */
6224f72b 2091 case 3:
3280af22 2092 if (PL_restartop) {
533c011a 2093 PL_op = PL_restartop;
3280af22 2094 PL_restartop = 0;
312caa8e 2095 goto redo_body;
a0d0e21e 2096 }
3280af22 2097 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2098 if (flags & G_ARRAY)
2099 retval = 0;
2100 else {
2101 retval = 1;
3280af22 2102 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 2103 }
312caa8e 2104 break;
a0d0e21e 2105 }
a0d0e21e 2106
3280af22 2107 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
2108 SV **newsp;
2109 PMOP *newpm;
2110 I32 gimme;
c09156bb 2111 register PERL_CONTEXT *cx;
a0a2876f
LW
2112 I32 optype;
2113
2114 POPBLOCK(cx,newpm);
2115 POPEVAL(cx);
3280af22 2116 PL_curpm = newpm;
a0a2876f 2117 LEAVE;
a0d0e21e 2118 }
14dd3ad8 2119 JMPENV_POP;
a0d0e21e 2120 }
1e422769 2121
a0d0e21e 2122 if (flags & G_DISCARD) {
3280af22 2123 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2124 retval = 0;
2125 FREETMPS;
2126 LEAVE;
2127 }
533c011a 2128 PL_op = oldop;
a0d0e21e
LW
2129 return retval;
2130}
2131
14dd3ad8 2132#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2133STATIC void *
14dd3ad8 2134S_vcall_body(pTHX_ va_list args)
312caa8e
CS
2135{
2136 OP *myop = va_arg(args, OP*);
2137 int is_eval = va_arg(args, int);
2138
14dd3ad8 2139 call_body(myop, is_eval);
312caa8e
CS
2140 return NULL;
2141}
14dd3ad8 2142#endif
312caa8e
CS
2143
2144STATIC void
14dd3ad8 2145S_call_body(pTHX_ OP *myop, int is_eval)
312caa8e 2146{
312caa8e
CS
2147 if (PL_op == myop) {
2148 if (is_eval)
f807eda9 2149 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 2150 else
f807eda9 2151 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
2152 }
2153 if (PL_op)
cea2e8a9 2154 CALLRUNOPS(aTHX);
312caa8e
CS
2155}
2156
6e72f9df 2157/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 2158
954c1994
GS
2159/*
2160=for apidoc p||eval_sv
2161
2162Tells Perl to C<eval> the string in the SV.
2163
2164=cut
2165*/
2166
a0d0e21e 2167I32
864dbfa3 2168Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 2169
8ac85365 2170 /* See G_* flags in cop.h */
a0d0e21e 2171{
924508f0 2172 dSP;
a0d0e21e 2173 UNOP myop; /* fake syntax tree node */
8fa7f367 2174 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 2175 volatile I32 retval = 0;
4633a7c4 2176 I32 oldscope;
6224f72b 2177 int ret;
533c011a 2178 OP* oldop = PL_op;
db36c5a1 2179 dJMPENV;
84902520 2180
4633a7c4
LW
2181 if (flags & G_DISCARD) {
2182 ENTER;
2183 SAVETMPS;
2184 }
2185
462e5cf6 2186 SAVEOP();
533c011a
NIS
2187 PL_op = (OP*)&myop;
2188 Zero(PL_op, 1, UNOP);
3280af22
NIS
2189 EXTEND(PL_stack_sp, 1);
2190 *++PL_stack_sp = sv;
2191 oldscope = PL_scopestack_ix;
79072805 2192
4633a7c4
LW
2193 if (!(flags & G_NOARGS))
2194 myop.op_flags = OPf_STACKED;
79072805 2195 myop.op_next = Nullop;
6e72f9df 2196 myop.op_type = OP_ENTEREVAL;
54310121
PP
2197 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2198 (flags & G_ARRAY) ? OPf_WANT_LIST :
2199 OPf_WANT_SCALAR);
6e72f9df
PP
2200 if (flags & G_KEEPERR)
2201 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2202
14dd3ad8 2203#ifdef PERL_FLEXIBLE_EXCEPTIONS
312caa8e 2204 redo_body:
14dd3ad8 2205 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
db36c5a1 2206 (OP*)&myop, TRUE);
14dd3ad8 2207#else
dedbcade
DM
2208 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2209 * before a PUSHEVAL, which corrupts the stack after a croak */
2210 TAINT_PROPER("eval_sv()");
2211
14dd3ad8
GS
2212 JMPENV_PUSH(ret);
2213#endif
6224f72b
GS
2214 switch (ret) {
2215 case 0:
14dd3ad8
GS
2216#ifndef PERL_FLEXIBLE_EXCEPTIONS
2217 redo_body:
2218 call_body((OP*)&myop,TRUE);
2219#endif
312caa8e
CS
2220 retval = PL_stack_sp - (PL_stack_base + oldmark);
2221 if (!(flags & G_KEEPERR))
2222 sv_setpv(ERRSV,"");
4633a7c4 2223 break;
6224f72b 2224 case 1:
f86702cc 2225 STATUS_ALL_FAILURE;
4633a7c4 2226 /* FALL THROUGH */
6224f72b 2227 case 2:
4633a7c4 2228 /* my_exit() was called */
3280af22 2229 PL_curstash = PL_defstash;
4633a7c4 2230 FREETMPS;
14dd3ad8 2231 JMPENV_POP;
cc3604b1 2232 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2233 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2234 my_exit_jump();
4633a7c4 2235 /* NOTREACHED */
6224f72b 2236 case 3:
3280af22 2237 if (PL_restartop) {
533c011a 2238 PL_op = PL_restartop;
3280af22 2239 PL_restartop = 0;
312caa8e 2240 goto redo_body;
4633a7c4 2241 }
3280af22 2242 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2243 if (flags & G_ARRAY)
2244 retval = 0;
2245 else {
2246 retval = 1;
3280af22 2247 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2248 }
312caa8e 2249 break;
4633a7c4
LW
2250 }
2251
14dd3ad8 2252 JMPENV_POP;
4633a7c4 2253 if (flags & G_DISCARD) {
3280af22 2254 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2255 retval = 0;
2256 FREETMPS;
2257 LEAVE;
2258 }
533c011a 2259 PL_op = oldop;
4633a7c4
LW
2260 return retval;
2261}
2262
954c1994
GS
2263/*
2264=for apidoc p||eval_pv
2265
2266Tells Perl to C<eval> the given string and return an SV* result.
2267
2268=cut
2269*/
2270
137443ea 2271SV*
864dbfa3 2272Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2273{
2274 dSP;
2275 SV* sv = newSVpv(p, 0);
2276
864dbfa3 2277 eval_sv(sv, G_SCALAR);
137443ea
PP
2278 SvREFCNT_dec(sv);
2279
2280 SPAGAIN;
2281 sv = POPs;
2282 PUTBACK;
2283
2d8e6c8d
GS
2284 if (croak_on_error && SvTRUE(ERRSV)) {
2285 STRLEN n_a;
cea2e8a9 2286 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2287 }
137443ea
PP
2288
2289 return sv;
2290}
2291
4633a7c4
LW
2292/* Require a module. */
2293
954c1994 2294/*
ccfc67b7
JH
2295=head1 Embedding Functions
2296
954c1994
GS
2297=for apidoc p||require_pv
2298
7d3fb230
BS
2299Tells Perl to C<require> the file named by the string argument. It is
2300analogous to the Perl code C<eval "require '$file'">. It's even
2307c6d0 2301implemented that way; consider using load_module instead.
954c1994 2302
7d3fb230 2303=cut */
954c1994 2304
4633a7c4 2305void
864dbfa3 2306Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2307{
d3acc0f7
JP
2308 SV* sv;
2309 dSP;
e788e7d3 2310 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2311 PUTBACK;
2312 sv = sv_newmortal();
4633a7c4
LW
2313 sv_setpv(sv, "require '");
2314 sv_catpv(sv, pv);
2315 sv_catpv(sv, "'");
864dbfa3 2316 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2317 SPAGAIN;
2318 POPSTACK;
79072805
LW
2319}
2320
79072805 2321void
864dbfa3 2322Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
79072805
LW
2323{
2324 register GV *gv;
2325
155aba94 2326 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2327 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2328}
2329
76e3520e 2330STATIC void
cea2e8a9 2331S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
4633a7c4 2332{
ab821d7f 2333 /* This message really ought to be max 23 lines.
75c72d73 2334 * Removed -h because the user already knows that option. Others? */
fb73857a 2335
76e3520e 2336 static char *usage_msg[] = {
fb73857a
PP
2337"-0[octal] specify record separator (\\0, if no argument)",
2338"-a autosplit mode with -n or -p (splits $_ into @F)",
fb3560ee 2339"-C[number/list] enables the listed Unicode features",
1950ee41 2340"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2341"-d[:debugger] run program under debugger",
2342"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
90490ea3 2343"-e program one line of program (several -e's allowed, omit programfile)",
aac3bd0d
GS
2344"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2345"-i[extension] edit <> files in place (makes backup if extension supplied)",
2346"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2347"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2348"-[mM][-]module execute `use/no module...' before executing program",
2349"-n assume 'while (<>) { ... }' loop around program",
2350"-p assume loop like -n but print line also, like sed",
2351"-P run program through C preprocessor before compilation",
2352"-s enable rudimentary parsing for switches after programfile",
2353"-S look for programfile using PATH environment variable",
9cbc33e8 2354"-t enable tainting warnings",
90490ea3 2355"-T enable tainting checks",
aac3bd0d 2356"-u dump core after parsing program",
fb73857a 2357"-U allow unsafe operations",
aac3bd0d
GS
2358"-v print version, subversion (includes VERY IMPORTANT perl info)",
2359"-V[:variable] print configuration summary (or a single Config.pm variable)",
2360"-w enable many useful warnings (RECOMMENDED)",
3c0facb2 2361"-W enable all warnings",
fb73857a 2362"-x[directory] strip off text before #!perl line and perhaps cd to directory",
90490ea3 2363"-X disable all warnings",
fb73857a
PP
2364"\n",
2365NULL
2366};
76e3520e 2367 char **p = usage_msg;
fb73857a 2368
b0e47665
GS
2369 PerlIO_printf(PerlIO_stdout(),
2370 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2371 name);
fb73857a 2372 while (*p)
b0e47665 2373 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2374}
2375
b4ab917c
DM
2376/* convert a string of -D options (or digits) into an int.
2377 * sets *s to point to the char after the options */
2378
2379#ifdef DEBUGGING
2380int
ddcf8bc1 2381Perl_get_debug_opts(pTHX_ char **s, bool givehelp)
b4ab917c 2382{
e6e64d9b
JC
2383 static char *usage_msgd[] = {
2384 " Debugging flag values: (see also -d)",
2385 " p Tokenizing and parsing (with v, displays parse stack)",
3679267a 2386 " s Stack snapshots (with v, displays all stacks)",
e6e64d9b
JC
2387 " l Context (loop) stack processing",
2388 " t Trace execution",
2389 " o Method and overloading resolution",
2390 " c String/numeric conversions",
2391 " P Print profiling info, preprocessor command for -P, source file input state",
2392 " m Memory allocation",
2393 " f Format processing",
2394 " r Regular expression parsing and execution",
2395 " x Syntax tree dump",
3679267a 2396 " u Tainting checks",
e6e64d9b
JC
2397 " H Hash dump -- usurps values()",
2398 " X Scratchpad allocation",
2399 " D Cleaning up",
2400 " S Thread synchronization",
2401 " T Tokenising",
2402 " R Include reference counts of dumped variables (eg when using -Ds)",
2403 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2404 " v Verbose: use in conjunction with other flags",
2405 " C Copy On Write",
2406 " A Consistency checks on internal structures",
3679267a 2407 " q quiet - currently only suppresses the 'EXECUTING' message",
e6e64d9b
JC
2408 NULL
2409 };
b4ab917c
DM
2410 int i = 0;
2411 if (isALPHA(**s)) {
2412 /* if adding extra options, remember to update DEBUG_MASK */
ecae49c0 2413 static char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
b4ab917c
DM
2414
2415 for (; isALNUM(**s); (*s)++) {
2416 char *d = strchr(debopts,**s);
2417 if (d)
2418 i |= 1 << (d - debopts);
2419 else if (ckWARN_d(WARN_DEBUGGING))
e6e64d9b
JC
2420 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2421 "invalid option -D%c, use -D'' to see choices\n", **s);
b4ab917c
DM
2422 }
2423 }
e6e64d9b 2424 else if (isDIGIT(**s)) {
b4ab917c
DM
2425 i = atoi(*s);
2426 for (; isALNUM(**s); (*s)++) ;
2427 }
ddcf8bc1 2428 else if (givehelp) {
e6e64d9b
JC
2429 char **p = usage_msgd;
2430 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2431 }
b4ab917c
DM
2432# ifdef EBCDIC
2433 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2434 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2435 "-Dp not implemented on this platform\n");
2436# endif
2437 return i;
2438}
2439#endif
2440
79072805
LW
2441/* This routine handles any switches that can be given during run */
2442
2443char *
864dbfa3 2444Perl_moreswitches(pTHX_ char *s)
79072805 2445{
ba210ebe 2446 STRLEN numlen;
84c133a0 2447 UV rschar;
79072805
LW
2448
2449 switch (*s) {
2450 case '0':
a863c7d1 2451 {
f2095865
JH
2452 I32 flags = 0;
2453
2454 SvREFCNT_dec(PL_rs);
2455 if (s[1] == 'x' && s[2]) {
2456 char *e;
2457 U8 *tmps;
2458
2459 for (s += 2, e = s; *e; e++);
2460 numlen = e - s;
2461 flags = PERL_SCAN_SILENT_ILLDIGIT;
2462 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2463 if (s + numlen < e) {
2464 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2465 numlen = 0;
2466 s--;
2467 }
2468 PL_rs = newSVpvn("", 0);
c5661c80 2469 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
f2095865
JH
2470 tmps = (U8*)SvPVX(PL_rs);
2471 uvchr_to_utf8(tmps, rschar);
2472 SvCUR_set(PL_rs, UNISKIP(rschar));
2473 SvUTF8_on(PL_rs);
2474 }
2475 else {
2476 numlen = 4;
2477 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2478 if (rschar & ~((U8)~0))
2479 PL_rs = &PL_sv_undef;
2480 else if (!rschar && numlen >= 2)
2481 PL_rs = newSVpvn("", 0);
2482 else {
2483 char ch = (char)rschar;
2484 PL_rs = newSVpvn(&ch, 1);
2485 }
2486 }
800633c3 2487 sv_setsv(get_sv("/", TRUE), PL_rs);
f2095865 2488 return s + numlen;
a863c7d1 2489 }
46487f74 2490 case 'C':
a05d7ebb
JH
2491 s++;
2492 PL_unicode = parse_unicode_opts(&s);
46487f74 2493 return s;
2304df62 2494 case 'F':
3280af22 2495 PL_minus_F = TRUE;
ebce5377
RGS
2496 PL_splitstr = ++s;
2497 while (*s && !isSPACE(*s)) ++s;
2498 *s = '\0';
2499 PL_splitstr = savepv(PL_splitstr);
2304df62 2500 return s;
79072805 2501 case 'a':
3280af22 2502 PL_minus_a = TRUE;
79072805
LW
2503 s++;
2504 return s;
2505 case 'c':
3280af22 2506 PL_minus_c = TRUE;
79072805
LW
2507 s++;
2508 return s;
2509 case 'd':
bbce6d69 2510 forbid_setid("-d");
4633a7c4 2511 s++;
2cbb2ee1
RGS
2512
2513 /* -dt indicates to the debugger that threads will be used */
2514 if (*s == 't' && !isALNUM(s[1])) {
2515 ++s;
2516 my_setenv("PERL5DB_THREADED", "1");
2517 }
2518
70c94a19
RR
2519 /* The following permits -d:Mod to accepts arguments following an =
2520 in the fashion that -MSome::Mod does. */
2521 if (*s == ':' || *s == '=') {
2522 char *start;
2523 SV *sv;
2524 sv = newSVpv("use Devel::", 0);
2525 start = ++s;
2526 /* We now allow -d:Module=Foo,Bar */
2527 while(isALNUM(*s) || *s==':') ++s;
2528 if (*s != '=')
2529 sv_catpv(sv, start);
2530 else {
2531 sv_catpvn(sv, start, s-start);
2532 sv_catpv(sv, " split(/,/,q{");
2533 sv_catpv(sv, ++s);
3d27e215 2534 sv_catpv(sv, "})");
70c94a19 2535 }
4633a7c4 2536 s += strlen(s);
70c94a19 2537 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2538 }
ed094faf 2539 if (!PL_perldb) {
3280af22 2540 PL_perldb = PERLDB_ALL;
a0d0e21e 2541 init_debugger();
ed094faf 2542 }
79072805
LW
2543 return s;
2544 case 'D':
0453d815 2545 {
79072805 2546#ifdef DEBUGGING
bbce6d69 2547 forbid_setid("-D");
b4ab917c 2548 s++;
ddcf8bc1 2549 PL_debug = get_debug_opts(&s, 1) | DEBUG_TOP_FLAG;
12a43e32 2550#else /* !DEBUGGING */
0453d815 2551 if (ckWARN_d(WARN_DEBUGGING))
9014280d 2552 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
e6e64d9b 2553 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
a0d0e21e 2554 for (s++; isALNUM(*s); s++) ;
79072805
LW
2555#endif
2556 /*SUPPRESS 530*/
2557 return s;
0453d815 2558 }
4633a7c4 2559 case 'h':
ac27b0f5 2560 usage(PL_origargv[0]);
7ca617d0 2561 my_exit(0);
79072805 2562 case 'i':
3280af22
NIS
2563 if (PL_inplace)
2564 Safefree(PL_inplace);
c030f24b
GH
2565#if defined(__CYGWIN__) /* do backup extension automagically */
2566 if (*(s+1) == '\0') {
2567 PL_inplace = savepv(".bak");
2568 return s+1;
2569 }
2570#endif /* __CYGWIN__ */
3280af22 2571 PL_inplace = savepv(s+1);
79072805 2572 /*SUPPRESS 530*/
3280af22 2573 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2574 if (*s) {
fb73857a 2575 *s++ = '\0';
7b8d334a
GS
2576 if (*s == '-') /* Additional switches on #! line. */
2577 s++;
2578 }
fb73857a 2579 return s;
4e49a025 2580 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2581 forbid_setid("-I");
fb73857a
PP
2582 ++s;
2583 while (*s && isSPACE(*s))
2584 ++s;
2585 if (*s) {
774d564b 2586 char *e, *p;
0df16ed7
GS
2587 p = s;
2588 /* ignore trailing spaces (possibly followed by other switches) */
2589 do {
2590 for (e = p; *e && !isSPACE(*e); e++) ;
2591 p = e;
2592 while (isSPACE(*p))
2593 p++;
2594 } while (*p && *p != '-');
2595 e = savepvn(s, e-s);
574c798a 2596 incpush(e, TRUE, TRUE, FALSE);
0df16ed7
GS
2597 Safefree(e);
2598 s = p;
2599 if (*s == '-')
2600 s++;
79072805
LW
2601 }
2602 else
a67e862a 2603 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2604 return s;
79072805 2605 case 'l':
3280af22 2606 PL_minus_l = TRUE;
79072805 2607 s++;
7889fe52
NIS
2608 if (PL_ors_sv) {
2609 SvREFCNT_dec(PL_ors_sv);
2610 PL_ors_sv = Nullsv;
2611 }
79072805 2612 if (isDIGIT(*s)) {
53305cf1 2613 I32 flags = 0;
7889fe52 2614 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2615 numlen = 3 + (*s == '0');
2616 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2617 s += numlen;
2618 }
2619 else {
8bfdd7d9 2620 if (RsPARA(PL_rs)) {
7889fe52
NIS
2621 PL_ors_sv = newSVpvn("\n\n",2);
2622 }
2623 else {
8bfdd7d9 2624 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2625 }
79072805
LW
2626 }
2627 return s;
06492da6
SF
2628 case 'A':
2629 forbid_setid("-A");
930366bd
RGS
2630 if (!PL_preambleav)
2631 PL_preambleav = newAV();
06492da6 2632 if (*++s) {
3d27e215
LM
2633 SV *sv = newSVpv("use assertions::activate split(/,/,q", 0);
2634 sv_catpvn(sv, "\0", 1); /* Use NUL as q//-delimiter. */
06492da6 2635 sv_catpv(sv,s);
3d27e215 2636 sv_catpvn(sv, "\0)", 2);
06492da6 2637 s+=strlen(s);
06492da6
SF
2638 av_push(PL_preambleav, sv);
2639 }
2640 else
930366bd 2641 av_push(PL_preambleav, newSVpvn("use assertions::activate",24));
06492da6 2642 return s;
1a30305b 2643 case 'M':
bbce6d69 2644 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2645 /* FALL THROUGH */
2646 case 'm':
bbce6d69 2647 forbid_setid("-m"); /* XXX ? */
1a30305b 2648 if (*++s) {
a5f75d66 2649 char *start;
11343788 2650 SV *sv;
a5f75d66
AD
2651 char *use = "use ";
2652 /* -M-foo == 'no foo' */
2653 if (*s == '-') { use = "no "; ++s; }
11343788 2654 sv = newSVpv(use,0);
a5f75d66 2655 start = s;
1a30305b 2656 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2657 while(isALNUM(*s) || *s==':') ++s;
2658 if (*s != '=') {
11343788 2659 sv_catpv(sv, start);
c07a80fd
PP
2660 if (*(start-1) == 'm') {
2661 if (*s != '\0')
cea2e8a9 2662 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2663 sv_catpv( sv, " ()");
c07a80fd
PP
2664 }
2665 } else {
6df41af2 2666 if (s == start)
be98fb35
GS
2667 Perl_croak(aTHX_ "Module name required with -%c option",
2668 s[-1]);
11343788 2669 sv_catpvn(sv, start, s-start);
3d27e215
LM
2670 sv_catpv(sv, " split(/,/,q");
2671 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
11343788 2672 sv_catpv(sv, ++s);
3d27e215 2673 sv_catpvn(sv, "\0)", 2);
c07a80fd 2674 }
1a30305b 2675 s += strlen(s);
5c831c24 2676 if (!PL_preambleav)
3280af22
NIS
2677 PL_preambleav = newAV();
2678 av_push(PL_preambleav, sv);
1a30305b
PP
2679 }
2680 else
9e81e6a1 2681 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
1a30305b 2682 return s;
79072805 2683 case 'n':
3280af22 2684 PL_minus_n = TRUE;
79072805
LW
2685 s++;
2686 return s;
2687 case 'p':
3280af22 2688 PL_minus_p = TRUE;
79072805
LW
2689 s++;
2690 return s;
2691 case 's':
bbce6d69 2692 forbid_setid("-s");
3280af22 2693 PL_doswitches = TRUE;
79072805
LW
2694 s++;
2695 return s;
6537fe72
MS
2696 case 't':
2697 if (!PL_tainting)
22f7c9c9 2698 TOO_LATE_FOR('t');
6537fe72
MS
2699 s++;
2700 return s;
463ee0b2 2701 case 'T':
3280af22 2702 if (!PL_tainting)
22f7c9c9 2703 TOO_LATE_FOR('T');
463ee0b2
LW
2704 s++;
2705 return s;
79072805 2706 case 'u':
bf4acbe4
GS
2707#ifdef MACOS_TRADITIONAL
2708 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2709#endif
3280af22 2710 PL_do_undump = TRUE;
79072805
LW
2711 s++;
2712 return s;
2713 case 'U':
3280af22 2714 PL_unsafe = TRUE;
79072805
LW
2715 s++;
2716 return s;
2717 case 'v':
d7aa5382
JP
2718 if (!sv_derived_from(PL_patchlevel, "version"))
2719 (void *)upg_version(PL_patchlevel);
8e9464f1 2720#if !defined(DGUX)
b0e47665 2721 PerlIO_printf(PerlIO_stdout(),
d7aa5382
JP
2722 Perl_form(aTHX_ "\nThis is perl, v%_ built for %s",
2723 vstringify(PL_patchlevel),
2724 ARCHNAME));
8e9464f1
JH
2725#else /* DGUX */
2726/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2727 PerlIO_printf(PerlIO_stdout(),
d7aa5382
JP
2728 Perl_form(aTHX_ "\nThis is perl, v%_\n",
2729 vstringify(PL_patchlevel)));
8e9464f1
JH
2730 PerlIO_printf(PerlIO_stdout(),
2731 Perl_form(aTHX_ " built under %s at %s %s\n",
2732 OSNAME, __DATE__, __TIME__));
2733 PerlIO_printf(PerlIO_stdout(),
2734 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2735 OSVERS));
8e9464f1
JH
2736#endif /* !DGUX */
2737
fb73857a
PP
2738#if defined(LOCAL_PATCH_COUNT)
2739 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2740 PerlIO_printf(PerlIO_stdout(),
2741 "\n(with %d registered patch%s, "
2742 "see perl -V for more detail)",
2743 (int)LOCAL_PATCH_COUNT,
2744 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2745#endif
1a30305b 2746
b0e47665 2747 PerlIO_printf(PerlIO_stdout(),
45a2796c 2748 "\n\nCopyright 1987-2004, Larry Wall\n");
eae9c151
JH
2749#ifdef MACOS_TRADITIONAL
2750 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2751 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 2752 "maintained by Chris Nandor\n");
eae9c151 2753#endif
79072805 2754#ifdef MSDOS
b0e47665
GS
2755 PerlIO_printf(PerlIO_stdout(),
2756 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2757#endif
2758#ifdef DJGPP
b0e47665
GS
2759 PerlIO_printf(PerlIO_stdout(),
2760 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2761 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2762#endif
79072805 2763#ifdef OS2
b0e47665
GS
2764 PerlIO_printf(PerlIO_stdout(),
2765 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 2766 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2767#endif
79072805 2768#ifdef atarist
b0e47665
GS
2769 PerlIO_printf(PerlIO_stdout(),
2770 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2771#endif
a3f9223b 2772#ifdef __BEOS__
b0e47665
GS
2773 PerlIO_printf(PerlIO_stdout(),
2774 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2775#endif
1d84e8df 2776#ifdef MPE
b0e47665 2777 PerlIO_printf(PerlIO_stdout(),
e583a879 2778 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
1d84e8df 2779#endif
9d116dd7 2780#ifdef OEMVS
b0e47665
GS
2781 PerlIO_printf(PerlIO_stdout(),
2782 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2783#endif
495c5fdc 2784#ifdef __VOS__
b0e47665 2785 PerlIO_printf(PerlIO_stdout(),
94efb9fb 2786 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 2787#endif
092bebab 2788#ifdef __OPEN_VM
b0e47665
GS
2789 PerlIO_printf(PerlIO_stdout(),
2790 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2791#endif
a1a0e61e 2792#ifdef POSIX_BC
b0e47665
GS
2793 PerlIO_printf(PerlIO_stdout(),
2794 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2795#endif
61ae2fbf 2796#ifdef __MINT__
b0e47665
GS
2797 PerlIO_printf(PerlIO_stdout(),
2798 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2799#endif
f83d2536 2800#ifdef EPOC
b0e47665 2801 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2802 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 2803#endif
e1caacb4 2804#ifdef UNDER_CE
b475b3e6
JH
2805 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
2806 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
e1caacb4
JH
2807 wce_hitreturn();
2808#endif
baed7233
DL
2809#ifdef BINARY_BUILD_NOTICE
2810 BINARY_BUILD_NOTICE;
2811#endif
b0e47665
GS
2812 PerlIO_printf(PerlIO_stdout(),
2813 "\n\
79072805 2814Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2815GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2816Complete documentation for Perl, including FAQ lists, should be found on\n\
2817this system using `man perl' or `perldoc perl'. If you have access to the\n\
c9e30dd8 2818Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
7ca617d0 2819 my_exit(0);
79072805 2820 case 'w':
599cee73 2821 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2822 PL_dowarn |= G_WARN_ON;
599cee73
PM
2823 s++;
2824 return s;
2825 case 'W':
ac27b0f5 2826 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS
2827 if (!specialWARN(PL_compiling.cop_warnings))
2828 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2829 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2830 s++;
2831 return s;
2832 case 'X':
ac27b0f5 2833 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS
2834 if (!specialWARN(PL_compiling.cop_warnings))
2835 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2836 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2837 s++;
2838 return s;
a0d0e21e 2839 case '*':
79072805
LW
2840 case ' ':
2841 if (s[1] == '-') /* Additional switches on #! line. */
2842 return s+2;
2843 break;
a0d0e21e 2844 case '-':
79072805 2845 case 0:
51882d45 2846#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2847 case '\r':
2848#endif
79072805
LW
2849 case '\n':
2850 case '\t':
2851 break;
aa689395
PP
2852#ifdef ALTERNATE_SHEBANG
2853 case 'S': /* OS/2 needs -S on "extproc" line. */
2854 break;
2855#endif
a0d0e21e 2856 case 'P':
3280af22 2857 if (PL_preprocess)
a0d0e21e
LW
2858 return s+1;
2859 /* FALL THROUGH */
79072805 2860 default:
cea2e8a9 2861 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2862 }
2863 return Nullch;
2864}
2865
2866/* compliments of Tom Christiansen */
2867
2868/* unexec() can be found in the Gnu emacs distribution */
ee580363 2869/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2870
2871void
864dbfa3 2872Perl_my_unexec(pTHX)
79072805
LW
2873{
2874#ifdef UNEXEC
46fc3d4c
PP
2875 SV* prog;
2876 SV* file;
ee580363 2877 int status = 1;
79072805
LW
2878 extern int etext;
2879
ee580363 2880 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2881 sv_catpv(prog, "/perl");
6b88bc9c 2882 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2883 sv_catpv(file, ".perldump");
79072805 2884
ee580363
GS
2885 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2886 /* unexec prints msg to stderr in case of failure */
6ad3d225 2887 PerlProc_exit(status);
79072805 2888#else
a5f75d66
AD
2889# ifdef VMS
2890# include <lib$routines.h>
2891 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2892# else
79072805 2893 ABORT(); /* for use with undump */
aa689395 2894# endif
a5f75d66 2895#endif
79072805
LW
2896}
2897
cb68f92d
GS
2898/* initialize curinterp */
2899STATIC void
cea2e8a9 2900S_init_interp(pTHX)
cb68f92d
GS
2901{
2902
acfe0abc
GS
2903#ifdef MULTIPLICITY
2904# define PERLVAR(var,type)
2905# define PERLVARA(var,n,type)
2906# if defined(PERL_IMPLICIT_CONTEXT)
2907# if defined(USE_5005THREADS)
2908# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
c5be433b 2909# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
2910# else /* !USE_5005THREADS */
2911# define PERLVARI(var,type,init) aTHX->var = init;
2912# define PERLVARIC(var,type,init) aTHX->var = init;
2913# endif /* USE_5005THREADS */
3967c732 2914# else
acfe0abc
GS
2915# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2916# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 2917# endif
acfe0abc
GS
2918# include "intrpvar.h"
2919# ifndef USE_5005THREADS
2920# include "thrdvar.h"
2921# endif
2922# undef PERLVAR
2923# undef PERLVARA
2924# undef PERLVARI
2925# undef PERLVARIC
2926#else
2927# define PERLVAR(var,type)
2928# define PERLVARA(var,n,type)
2929# define PERLVARI(var,type,init) PL_##var = init;
2930# define PERLVARIC(var,type,init) PL_##var = init;
2931# include "intrpvar.h"
2932# ifndef USE_5005THREADS
2933# include "thrdvar.h"
2934# endif
2935# undef PERLVAR
2936# undef PERLVARA
2937# undef PERLVARI
2938# undef PERLVARIC
cb68f92d
GS
2939#endif
2940
cb68f92d
GS
2941}
2942
76e3520e 2943STATIC void
cea2e8a9 2944S_init_main_stash(pTHX)
79072805 2945{
463ee0b2 2946 GV *gv;
6e72f9df 2947
3280af22 2948 PL_curstash = PL_defstash = newHV();
79cb57f6 2949 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
2950 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2951 SvREFCNT_dec(GvHV(gv));
3280af22 2952 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 2953 SvREADONLY_on(gv);
3280af22
NIS
2954 HvNAME(PL_defstash) = savepv("main");
2955 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2956 GvMULTI_on(PL_incgv);
2957 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2958 GvMULTI_on(PL_hintgv);
2959 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2960 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2961 GvMULTI_on(PL_errgv);
2962 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2963 GvMULTI_on(PL_replgv);
cea2e8a9 2964 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
2965 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2966 sv_setpvn(ERRSV, "", 0);
3280af22 2967 PL_curstash = PL_defstash;
11faa288 2968 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 2969 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 2970 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 2971 /* We must init $/ before switches are processed. */
864dbfa3 2972 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
2973}
2974
ae3f3efd 2975/* PSz 18 Nov 03 fdscript now global but do not change prototype */
76e3520e 2976STATIC void
c5cccb17 2977S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv)
79072805 2978{
ae3f3efd 2979#ifndef IAMSUID
1b24ed4b
MS
2980 char *quote;
2981 char *code;
2982 char *cpp_discard_flag;
2983 char *perl;
ae3f3efd 2984#endif
1b24ed4b 2985
ae3f3efd
PS
2986 PL_fdscript = -1;
2987 PL_suidscript = -1;
79072805 2988
3280af22
NIS
2989 if (PL_e_script) {
2990 PL_origfilename = savepv("-e");
96436eeb 2991 }
6c4ab083
GS
2992 else {
2993 /* if find_script() returns, it returns a malloc()-ed value */
3280af22 2994 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
2995
2996 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2997 char *s = scriptname + 8;
ae3f3efd 2998 PL_fdscript = atoi(s);
6c4ab083
GS
2999 while (isDIGIT(*s))
3000 s++;
3001 if (*s) {
ae3f3efd
PS
3002 /* PSz 18 Feb 04
3003 * Tell apart "normal" usage of fdscript, e.g.
3004 * with bash on FreeBSD:
3005 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3006 * from usage in suidperl.
3007 * Does any "normal" usage leave garbage after the number???
3008 * Is it a mistake to use a similar /dev/fd/ construct for
3009 * suidperl?
3010 */
3011 PL_suidscript = 1;
3012 /* PSz 20 Feb 04
3013 * Be supersafe and do some sanity-checks.
3014 * Still, can we be sure we got the right thing?
3015 */
3016 if (*s != '/') {
3017 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3018 }
3019 if (! *(s+1)) {
3020 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3021 }
6c4ab083 3022 scriptname = savepv(s + 1);
3280af22
NIS
3023 Safefree(PL_origfilename);
3024 PL_origfilename = scriptname;
6c4ab083
GS
3025 }
3026 }
3027 }
3028
05ec9bb3 3029 CopFILE_free(PL_curcop);
57843af0 3030 CopFILE_set(PL_curcop, PL_origfilename);
3280af22 3031 if (strEQ(PL_origfilename,"-"))
79072805 3032 scriptname = "";
ae3f3efd
PS
3033 if (PL_fdscript >= 0) {
3034 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS
3035# if defined(HAS_FCNTL) && defined(F_SETFD)
3036 if (PL_rsfp)
3037 /* ensure close-on-exec */
3038 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3039# endif
96436eeb 3040 }
ae3f3efd
PS
3041#ifdef IAMSUID
3042 else {
86207487
NC
3043 Perl_croak(aTHX_ "sperl needs fd script\n"
3044 "You should not call sperl directly; do you need to "
3045 "change a #! line\nfrom sperl to perl?\n");
3046
ae3f3efd
PS
3047/* PSz 11 Nov 03
3048 * Do not open (or do other fancy stuff) while setuid.
3049 * Perl does the open, and hands script to suidperl on a fd;
3050 * suidperl only does some checks, sets up UIDs and re-execs
3051 * perl with that fd as it has always done.
3052 */
3053 }
3054 if (PL_suidscript != 1) {
3055 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3056 }
3057#else /* IAMSUID */
3280af22 3058 else if (PL_preprocess) {
46fc3d4c 3059 char *cpp_cfg = CPPSTDIN;
79cb57f6 3060 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
3061 SV *cmd = NEWSV(0,0);
3062
ae58f265
JH
3063 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3064 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
46fc3d4c 3065 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 3066 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 3067 sv_catpv(cpp, cpp_cfg);
79072805 3068
1b24ed4b
MS
3069# ifndef VMS
3070 sv_catpvn(sv, "-I", 2);
3071 sv_catpv(sv,PRIVLIB_EXP);
3072# endif
46fc3d4c 3073
14953ddc
MB
3074 DEBUG_P(PerlIO_printf(Perl_debug_log,
3075 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3076 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS
3077
3078# if defined(MSDOS) || defined(WIN32) || defined(VMS)
3079 quote = "\"";
3080# else
3081 quote = "'";
3082# endif
3083
3084# ifdef VMS
3085 cpp_discard_flag = "";
3086# else
3087 cpp_discard_flag = "-C";
3088# endif
3089
3090# ifdef OS2
3091 perl = os2_execname(aTHX);
3092# else
3093 perl = PL_origargv[0];
3094# endif
3095
3096
3097 /* This strips off Perl comments which might interfere with
62375a60
NIS
3098 the C pre-processor, including #!. #line directives are
3099 deliberately stripped to avoid confusion with Perl's version
1b24ed4b
MS
3100 of #line. FWP played some golf with it so it will fit
3101 into VMS's 255 character buffer.
3102 */
3103 if( PL_doextract )
3104 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3105 else
3106 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3107
3108 Perl_sv_setpvf(aTHX_ cmd, "\
3109%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
62375a60 3110 perl, quote, code, quote, scriptname, cpp,
1b24ed4b
MS
3111 cpp_discard_flag, sv, CPPMINUS);
3112
3280af22 3113 PL_doextract = FALSE;
0a6c758d 3114
62375a60
NIS
3115 DEBUG_P(PerlIO_printf(Perl_debug_log,
3116 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS
3117 SvPVX(cmd)));
3118
3280af22 3119 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
46fc3d4c
PP
3120 SvREFCNT_dec(cmd);
3121 SvREFCNT_dec(cpp);
79072805
LW
3122 }
3123 else if (!*scriptname) {
bbce6d69 3124 forbid_setid("program input from stdin");
3280af22 3125 PL_rsfp = PerlIO_stdin();
79072805 3126 }
96436eeb 3127 else {
3280af22 3128 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS
3129# if defined(HAS_FCNTL) && defined(F_SETFD)
3130 if (PL_rsfp)
3131 /* ensure close-on-exec */
3132 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3133# endif
96436eeb 3134 }
ae3f3efd 3135#endif /* IAMSUID */
3280af22 3136 if (!PL_rsfp) {
447218f8 3137 /* PSz 16 Sep 03 Keep neat error message */
fa3aa65a
JC
3138 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3139 CopFILE(PL_curcop), Strerror(errno));
13281fa4 3140 }
79072805 3141}
8d063cd8 3142
7b89560d
JH
3143/* Mention
3144 * I_SYSSTATVFS HAS_FSTATVFS
3145 * I_SYSMOUNT
c890dc6c 3146 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
3147 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3148 * here so that metaconfig picks them up. */
3149
104d25b7 3150#ifdef IAMSUID
864dbfa3 3151STATIC int
e688b231 3152S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 3153{
ae3f3efd
PS
3154/* PSz 27 Feb 04
3155 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3156 * but is needed also on machines without setreuid.
3157 * Seems safe enough to run as root.
3158 */
0545a864
JH
3159 int check_okay = 0; /* able to do all the required sys/libcalls */
3160 int on_nosuid = 0; /* the fd is on a nosuid fs */
ae3f3efd
PS
3161 /* PSz 12 Nov 03
3162 * Need to check noexec also: nosuid might not be set, the average
3163 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3164 */
3165 int on_noexec = 0; /* the fd is on a noexec fs */
3166
104d25b7 3167/*
ad27e871 3168 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 3169 * fstatvfs() is UNIX98.
0545a864 3170 * fstatfs() is 4.3 BSD.
ad27e871 3171 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
3172 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3173 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
3174 */
3175
6439433f
JH
3176#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3177
3178# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3179 defined(HAS_FSTATVFS)
3180# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 3181 struct statvfs stfs;
6439433f 3182
104d25b7
JH
3183 check_okay = fstatvfs(fd, &stfs) == 0;
3184 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
ae3f3efd
PS
3185#ifdef ST_NOEXEC
3186 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3187 on platforms where it is present. */
3188 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3189#endif
6439433f 3190# endif /* fstatvfs */
ac27b0f5 3191
6439433f
JH
3192# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3193 defined(PERL_MOUNT_NOSUID) && \
ae3f3efd 3194 defined(PERL_MOUNT_NOEXEC) && \
6439433f
JH
3195 defined(HAS_FSTATFS) && \
3196 defined(HAS_STRUCT_STATFS) && \
3197 defined(HAS_STRUCT_STATFS_F_FLAGS)
3198# define FD_ON_NOSUID_CHECK_OKAY
e688b231 3199 struct statfs stfs;
6439433f 3200
104d25b7 3201 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 3202 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
ae3f3efd 3203 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
6439433f
JH
3204# endif /* fstatfs */
3205
3206# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3207 defined(PERL_MOUNT_NOSUID) && \
ae3f3efd 3208 defined(PERL_MOUNT_NOEXEC) && \
6439433f
JH
3209 defined(HAS_FSTAT) && \
3210 defined(HAS_USTAT) && \
3211 defined(HAS_GETMNT) && \
3212 defined(HAS_STRUCT_FS_DATA) && \
3213 defined(NOSTAT_ONE)
3214# define FD_ON_NOSUID_CHECK_OKAY
c623ac67 3215 Stat_t fdst;
6439433f 3216
0545a864 3217 if (fstat(fd, &fdst) == 0) {
6439433f
JH
3218 struct ustat us;
3219 if (ustat(fdst.st_dev, &us) == 0) {
3220 struct fs_data fsd;
3221 /* NOSTAT_ONE here because we're not examining fields which
3222 * vary between that case and STAT_ONE. */
ad27e871 3223 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
3224 size_t cmplen = sizeof(us.f_fname);
3225 if (sizeof(fsd.fd_req.path) < cmplen)
3226 cmplen = sizeof(fsd.fd_req.path);
3227 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3228 fdst.st_dev == fsd.fd_req.dev) {
3229 check_okay = 1;
3230 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
ae3f3efd 3231 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
6439433f
JH
3232 }
3233 }
3234 }
3235 }
0545a864 3236 }
6439433f
JH
3237# endif /* fstat+ustat+getmnt */
3238
3239# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3240 defined(HAS_GETMNTENT) && \
3241 defined(HAS_HASMNTOPT) && \
ae3f3efd
PS
3242 defined(MNTOPT_NOSUID) && \
3243 defined(MNTOPT_NOEXEC)
6439433f
JH
3244# define FD_ON_NOSUID_CHECK_OKAY
3245 FILE *mtab = fopen("/etc/mtab", "r");
3246 struct mntent *entry;
c623ac67 3247 Stat_t stb, fsb;
104d25b7
JH
3248
3249 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
3250 while (entry = getmntent(mtab)) {
3251 if (stat(entry->mnt_dir, &fsb) == 0
3252 && fsb.st_dev == stb.st_dev)
3253 {
3254 /* found the filesystem */
3255 check_okay = 1;
3256 if (hasmntopt(entry, MNTOPT_NOSUID))
3257 on_nosuid = 1;
ae3f3efd
PS
3258 if (hasmntopt(entry, MNTOPT_NOEXEC))
3259 on_noexec = 1;
6439433f
JH
3260 break;
3261 } /* A single fs may well fail its stat(). */
3262 }
104d25b7
JH
3263 }
3264 if (mtab)
6439433f
JH
3265 fclose(mtab);
3266# endif /* getmntent+hasmntopt */
0545a864 3267
ac27b0f5 3268 if (!check_okay)
ae3f3efd
PS
3269 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3270 if (on_nosuid)
3271 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3272 if (on_noexec)
3273 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3274 return ((!check_okay) || on_nosuid || on_noexec);
104d25b7
JH
3275}
3276#endif /* IAMSUID */
3277
76e3520e 3278STATIC void
c5cccb17 3279S_validate_suid(pTHX_ char *validarg, char *scriptname)
79072805 3280{
155aba94 3281#ifdef IAMSUID
ae3f3efd
PS
3282 /* int which; */
3283#endif /* IAMSUID */
96436eeb 3284
13281fa4
LW
3285 /* do we need to emulate setuid on scripts? */
3286
3287 /* This code is for those BSD systems that have setuid #! scripts disabled
3288 * in the kernel because of a security problem. Merely defining DOSUID
3289 * in perl will not fix that problem, but if you have disabled setuid
3290 * scripts in the kernel, this will attempt to emulate setuid and setgid
3291 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
3292 * root version must be called suidperl or sperlN.NNN. If regular perl
3293 * discovers that it has opened a setuid script, it calls suidperl with
3294 * the same argv that it had. If suidperl finds that the script it has
3295 * just opened is NOT setuid root, it sets the effective uid back to the
3296 * uid. We don't just make perl setuid root because that loses the
3297 * effective uid we had before invoking perl, if it was different from the
3298 * uid.
ae3f3efd
PS
3299 * PSz 27 Feb 04
3300 * Description/comments above do not match current workings:
3301 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3302 * suidperl called with script open and name changed to /dev/fd/N/X;
3303 * suidperl croaks if script is not setuid;
3304 * making perl setuid would be a huge security risk (and yes, that
3305 * would lose any euid we might have had).
13281fa4
LW
3306 *
3307 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3308 * be defined in suidperl only. suidperl must be setuid root. The
3309 * Configure script will set this up for you if you want it.
3310 */
a687059c 3311
13281fa4 3312#ifdef DOSUID
6e72f9df 3313 char *s, *s2;
a0d0e21e 3314
b28d0864 3315 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 3316 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
ae3f3efd 3317 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 3318 I32 len;
2d8e6c8d 3319 STRLEN n_a;
13281fa4 3320
a687059c 3321#ifdef IAMSUID
ae3f3efd
PS
3322 if (PL_fdscript < 0 || PL_suidscript != 1)
3323 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3324 /* PSz 11 Nov 03
3325 * Since the script is opened by perl, not suidperl, some of these
3326 * checks are superfluous. Leaving them in probably does not lower
3327 * security(?!).
3328 */
3329 /* PSz 27 Feb 04
3330 * Do checks even for systems with no HAS_SETREUID.
3331 * We used to swap, then re-swap UIDs with
3332#ifdef HAS_SETREUID
3333 if (setreuid(PL_euid,PL_uid) < 0
3334 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3335 Perl_croak(aTHX_ "Can't swap uid and euid");
3336#endif
3337#ifdef HAS_SETREUID
3338 if (setreuid(PL_uid,PL_euid) < 0
3339 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3340 Perl_croak(aTHX_ "Can't reswap uid and euid");
3341#endif
3342 */
3343
a687059c
LW
3344 /* On this access check to make sure the directories are readable,
3345 * there is actually a small window that the user could use to make
3346 * filename point to an accessible directory. So there is a faint
3347 * chance that someone could execute a setuid script down in a
3348 * non-accessible directory. I don't know what to do about that.
3349 * But I don't think it's too important. The manual lies when
3350 * it says access() is useful in setuid programs.
ae3f3efd
PS
3351 *
3352 * So, access() is pretty useless... but not harmful... do anyway.
a687059c 3353 */
e57400b1 3354 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
ae3f3efd 3355 Perl_croak(aTHX_ "Can't access() script\n");
e57400b1 3356 }
ae3f3efd 3357
a687059c
LW
3358 /* If we can swap euid and uid, then we can determine access rights
3359 * with a simple stat of the file, and then compare device and
3360 * inode to make sure we did stat() on the same file we opened.
3361 * Then we just have to make sure he or she can execute it.
ae3f3efd
PS
3362 *
3363 * PSz 24 Feb 04
3364 * As the script is opened by perl, not suidperl, we do not need to
3365 * care much about access rights.
3366 *
3367 * The 'script changed' check is needed, or we can get lied to
3368 * about $0 with e.g.
3369 * suidperl /dev/fd/4//bin/x 4<setuidscript
3370 * Without HAS_SETREUID, is it safe to stat() as root?
3371 *
3372 * Are there any operating systems that pass /dev/fd/xxx for setuid
3373 * scripts, as suggested/described in perlsec(1)? Surely they do not
3374 * pass the script name as we do, so the "script changed" test would
3375 * fail for them... but we never get here with
3376 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3377 *
3378 * This is one place where we must "lie" about return status: not
3379 * say if the stat() failed. We are doing this as root, and could
3380 * be tricked into reporting existence or not of files that the
3381 * "plain" user cannot even see.
a687059c
LW
3382 */
3383 {
c623ac67 3384 Stat_t tmpstatbuf;
ae3f3efd
PS
3385 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3386 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
b28d0864 3387 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
ae3f3efd 3388 Perl_croak(aTHX_ "Setuid script changed\n");
a687059c 3389 }
ae3f3efd 3390
a687059c 3391 }
ae3f3efd
PS
3392 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3393 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3394
3395 /* PSz 27 Feb 04
3396 * We used to do this check as the "plain" user (after swapping
3397 * UIDs). But the check for nosuid and noexec filesystem is needed,
3398 * and should be done even without HAS_SETREUID. (Maybe those
3399 * operating systems do not have such mount options anyway...)
3400 * Seems safe enough to do as root.
3401 */
3402#if !defined(NO_NOSUID_CHECK)
3403 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3404 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3405 }
3406#endif
a687059c
LW
3407#endif /* IAMSUID */
3408
e57400b1 3409 if (!S_ISREG(PL_statbuf.st_mode)) {
ae3f3efd 3410 Perl_croak(aTHX_ "Setuid script not plain file\n");
e57400b1 3411 }
b28d0864 3412 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3413 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3414 PL_doswitches = FALSE; /* -s is insecure in suid */
ae3f3efd 3415 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
57843af0 3416 CopLINE_inc(PL_curcop);
6b88bc9c 3417 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3418 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3419 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3420 s = SvPV(PL_linestr,n_a)+2;
ae3f3efd
PS
3421 /* PSz 27 Feb 04 */
3422 /* Sanity check on line length */
3423 if (strlen(s) < 1 || strlen(s) > 4000)
3424 Perl_croak(aTHX_ "Very long #! line");
3425 /* Allow more than a single space after #! */
3426 while (isSPACE(*s)) s++;
3427 /* Sanity check on buffer end */
3428 while ((*s) && !isSPACE(*s)) s++;
2d8e6c8d 3429 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
6e72f9df 3430 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
ae3f3efd
PS
3431 /* Sanity check on buffer start */
3432 if ( (s2-4 < SvPV(PL_linestr,n_a)+2 || strnNE(s2-4,"perl",4)) &&
3433 (s-9 < SvPV(PL_linestr,n_a)+2 || strnNE(s-9,"perl",4)) )
cea2e8a9 3434 Perl_croak(aTHX_ "Not a perl script");
a687059c 3435 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3436 /*
3437 * #! arg must be what we saw above. They can invoke it by
3438 * mentioning suidperl explicitly, but they may not add any strange
3439 * arguments beyond what #! says if they do invoke suidperl that way.
3440 */
ae3f3efd
PS
3441 /*
3442 * The way validarg was set up, we rely on the kernel to start
3443 * scripts with argv[1] set to contain all #! line switches (the
3444 * whole line).
3445 */
3446 /*
3447 * Check that we got all the arguments listed in the #! line (not
3448 * just that there are no extraneous arguments). Might not matter
3449 * much, as switches from #! line seem to be acted upon (also), and
3450 * so may be checked and trapped in perl. But, security checks must
3451 * be done in suidperl and not deferred to perl. Note that suidperl
3452 * does not get around to parsing (and checking) the switches on
3453 * the #! line (but execs perl sooner).
3454 * Allow (require) a trailing newline (which may be of two
3455 * characters on some architectures?) (but no other trailing
3456 * whitespace).
3457 */
13281fa4
LW
3458 len = strlen(validarg);
3459 if (strEQ(validarg," PHOOEY ") ||
ae3f3efd
PS
3460 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3461 !(strlen(s) == len+1 || (strlen(s) == len+2 && isSPACE(s[len+1]))))
cea2e8a9 3462 Perl_croak(aTHX_ "Args must match #! line");
a687059c
LW
3463
3464#ifndef IAMSUID
ae3f3efd
PS
3465 if (PL_fdscript < 0 &&
3466 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
b28d0864
NIS
3467 PL_euid == PL_statbuf.st_uid)
3468 if (!PL_do_undump)
cea2e8a9 3469 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
11fb1898 3470FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
a687059c 3471#endif /* IAMSUID */
13281fa4 3472
ae3f3efd
PS
3473 if (PL_fdscript < 0 &&
3474 PL_euid) { /* oops, we're not the setuid root perl */
3475 /* PSz 18 Feb 04
3476 * When root runs a setuid script, we do not go through the same
3477 * steps of execing sperl and then perl with fd scripts, but
3478 * simply set up UIDs within the same perl invocation; so do
3479 * not have the same checks (on options, whatever) that we have
3480 * for plain users. No problem really: would have to be a script
3481 * that does not actually work for plain users; and if root is
3482 * foolish and can be persuaded to run such an unsafe script, he
3483 * might run also non-setuid ones, and deserves what he gets.
3484 *
3485 * Or, we might drop the PL_euid check above (and rely just on
3486 * PL_fdscript to avoid loops), and do the execs
3487 * even for root.
3488 */
13281fa4 3489#ifndef IAMSUID
ae3f3efd
PS
3490 int which;
3491 /* PSz 11 Nov 03
3492 * Pass fd script to suidperl.
3493 * Exec suidperl, substituting fd script for scriptname.
3494 * Pass script name as "subdir" of fd, which perl will grok;
3495 * in fact will use that to distinguish this from "normal"
3496 * usage, see comments above.
3497 */
3498 PerlIO_rewind(PL_rsfp);
3499 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3500 /* PSz 27 Feb 04 Sanity checks on scriptname */
3501 if ((!scriptname) || (!*scriptname) ) {
3502 Perl_croak(aTHX_ "No setuid script name\n");
3503 }
3504 if (*scriptname == '-') {
3505 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
3506 /* Or we might confuse it with an option when replacing
3507 * name in argument list, below (though we do pointer, not
3508 * string, comparisons).
3509 */
3510 }
3511 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3512 if (!PL_origargv[which]) {
3513 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
3514 }
3515 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
3516 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
3517#if defined(HAS_FCNTL) && defined(F_SETFD)
3518 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
3519#endif
b35112e7 3520 PERL_FPU_PRE_EXEC
a7cb1f99 3521 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
273cf8d1
GS
3522 (int)PERL_REVISION, (int)PERL_VERSION,
3523 (int)PERL_SUBVERSION), PL_origargv);
b35112e7 3524 PERL_FPU_POST_EXEC
ae3f3efd
PS
3525#endif /* IAMSUID */
3526 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
13281fa4
LW
3527 }
3528
b28d0864 3529 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
ae3f3efd
PS
3530/* PSz 26 Feb 04
3531 * This seems back to front: we try HAS_SETEGID first; if not available
3532 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
3533 * in the sense that we only want to set EGID; but are there any machines
3534 * with either of the latter, but not the former? Same with UID, later.
3535 */
fe14fcc3 3536#ifdef HAS_SETEGID
b28d0864 3537 (void)setegid(PL_statbuf.st_gid);
a687059c 3538#else
fe14fcc3 3539#ifdef HAS_SETREGID
b28d0864 3540 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
85e6fe83
LW
3541#else
3542#ifdef HAS_SETRESGID
b28d0864 3543 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
a687059c 3544#else
b28d0864 3545 PerlProc_setgid(PL_statbuf.st_gid);
a687059c
LW
3546#endif
3547#endif
85e6fe83 3548#endif
b28d0864 3549 if (PerlProc_getegid() != PL_statbuf.st_gid)
cea2e8a9 3550 Perl_croak(aTHX_ "Can't do setegid!\n");
83025b21 3551 }
b28d0864
NIS
3552 if (PL_statbuf.st_mode & S_ISUID) {
3553 if (PL_statbuf.st_uid != PL_euid)
fe14fcc3 355