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Add a new macro SvPV_free() which undoes OOK and free()s the PVX(),
[perl5.git] / perl.c
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1/* perl.c
2 *
4bb101f2 3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
770526c1 4 * 2000, 2001, 2002, 2003, 2004, 2005, 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 *
8d063cd8
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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
166f8a29
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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
DM
19 */
20
ae3f3efd
PS
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
011f1a1a
JH
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
5311654c
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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
PP
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
e6827a76 125static void
daa7d858 126S_init_tls_and_interp(PerlInterpreter *my_perl)
e6827a76 127{
27da23d5 128 dVAR;
e6827a76
NC
129 if (!PL_curinterp) {
130 PERL_SET_INTERP(my_perl);
3db8f154 131#if defined(USE_ITHREADS)
e6827a76
NC
132 INIT_THREADS;
133 ALLOC_THREAD_KEY;
134 PERL_SET_THX(my_perl);
135 OP_REFCNT_INIT;
136 MUTEX_INIT(&PL_dollarzero_mutex);
06d86050 137# endif
e6827a76
NC
138 }
139 else {
140 PERL_SET_THX(my_perl);
141 }
142}
06d86050 143
32e30700
GS
144#ifdef PERL_IMPLICIT_SYS
145PerlInterpreter *
7766f137
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146perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
147 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
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GS
148 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
149 struct IPerlDir* ipD, struct IPerlSock* ipS,
150 struct IPerlProc* ipP)
151{
152 PerlInterpreter *my_perl;
32e30700
GS
153 /* New() needs interpreter, so call malloc() instead */
154 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
e6827a76 155 S_init_tls_and_interp(my_perl);
32e30700
GS
156 Zero(my_perl, 1, PerlInterpreter);
157 PL_Mem = ipM;
7766f137
GS
158 PL_MemShared = ipMS;
159 PL_MemParse = ipMP;
32e30700
GS
160 PL_Env = ipE;
161 PL_StdIO = ipStd;
162 PL_LIO = ipLIO;
163 PL_Dir = ipD;
164 PL_Sock = ipS;
165 PL_Proc = ipP;
7766f137 166
32e30700
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167 return my_perl;
168}
169#else
954c1994
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170
171/*
ccfc67b7
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172=head1 Embedding Functions
173
954c1994
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174=for apidoc perl_alloc
175
176Allocates a new Perl interpreter. See L<perlembed>.
177
178=cut
179*/
180
93a17b20 181PerlInterpreter *
cea2e8a9 182perl_alloc(void)
79072805 183{
cea2e8a9 184 PerlInterpreter *my_perl;
79072805 185
54aff467 186 /* New() needs interpreter, so call malloc() instead */
e8ee3774 187 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 188
e6827a76 189 S_init_tls_and_interp(my_perl);
07409e01 190 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
79072805 191}
32e30700 192#endif /* PERL_IMPLICIT_SYS */
79072805 193
954c1994
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194/*
195=for apidoc perl_construct
196
197Initializes a new Perl interpreter. See L<perlembed>.
198
199=cut
200*/
201
79072805 202void
0cb96387 203perl_construct(pTHXx)
79072805 204{
27da23d5 205 dVAR;
8990e307 206#ifdef MULTIPLICITY
54aff467 207 init_interp();
ac27b0f5 208 PL_perl_destruct_level = 1;
54aff467
GS
209#else
210 if (PL_perl_destruct_level > 0)
211 init_interp();
212#endif
33f46ff6 213 /* Init the real globals (and main thread)? */
3280af22 214 if (!PL_linestr) {
2aea9f8a
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215 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
216
3280af22
NIS
217 PL_linestr = NEWSV(65,79);
218 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 219
3280af22 220 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
JP
221 /* set read-only and try to insure than we wont see REFCNT==0
222 very often */
223
3280af22
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224 SvREADONLY_on(&PL_sv_undef);
225 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 226
3280af22 227 sv_setpv(&PL_sv_no,PL_No);
0309f36e
NC
228 /* value lookup in void context - happens to have the side effect
229 of caching the numeric forms. */
230 SvIV(&PL_sv_no);
3280af22
NIS
231 SvNV(&PL_sv_no);
232 SvREADONLY_on(&PL_sv_no);
233 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 234
3280af22 235 sv_setpv(&PL_sv_yes,PL_Yes);
0309f36e 236 SvIV(&PL_sv_yes);
3280af22
NIS
237 SvNV(&PL_sv_yes);
238 SvREADONLY_on(&PL_sv_yes);
239 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
7996736c
MHM
240
241 SvREADONLY_on(&PL_sv_placeholder);
242 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
6e72f9df 243 }
79072805 244
cea2e8a9 245 PL_sighandlerp = Perl_sighandler;
3280af22 246 PL_pidstatus = newHV();
79072805
LW
247 }
248
8bfdd7d9 249 PL_rs = newSVpvn("\n", 1);
dc92893f 250
cea2e8a9 251 init_stacks();
79072805 252
748a9306 253 init_ids();
3280af22 254 PL_lex_state = LEX_NOTPARSING;
a5f75d66 255
312caa8e 256 JMPENV_BOOTSTRAP;
f86702cc
PP
257 STATUS_ALL_SUCCESS;
258
0672f40e 259 init_i18nl10n(1);
36477c24 260 SET_NUMERIC_STANDARD();
0b5b802d 261
ab821d7f 262#if defined(LOCAL_PATCH_COUNT)
3280af22 263 PL_localpatches = local_patches; /* For possible -v */
ab821d7f
PP
264#endif
265
52853b95
GS
266#ifdef HAVE_INTERP_INTERN
267 sys_intern_init();
268#endif
269
3a1ee7e8 270 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 271
3280af22
NIS
272 PL_fdpid = newAV(); /* for remembering popen pids by fd */
273 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 274 PL_errors = newSVpvn("",0);
48c6b404 275 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
1f483ca1
JH
276 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
277 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
1fcf4c12 278#ifdef USE_ITHREADS
13137afc
AB
279 PL_regex_padav = newAV();
280 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
281 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 282#endif
e5dd39fc 283#ifdef USE_REENTRANT_API
59bd0823 284 Perl_reentrant_init(aTHX);
e5dd39fc 285#endif
3d47000e
AB
286
287 /* Note that strtab is a rather special HV. Assumptions are made
288 about not iterating on it, and not adding tie magic to it.
289 It is properly deallocated in perl_destruct() */
290 PL_strtab = newHV();
291
3d47000e
AB
292 HvSHAREKEYS_off(PL_strtab); /* mandatory */
293 hv_ksplit(PL_strtab, 512);
294
0631ea03
AB
295#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
296 _dyld_lookup_and_bind
297 ("__environ", (unsigned long *) &environ_pointer, NULL);
298#endif /* environ */
299
2f42fcb0
JH
300#ifndef PERL_MICRO
301# ifdef USE_ENVIRON_ARRAY
0631ea03 302 PL_origenviron = environ;
2f42fcb0 303# endif
0631ea03
AB
304#endif
305
5311654c 306 /* Use sysconf(_SC_CLK_TCK) if available, if not
dbc1d986 307 * available or if the sysconf() fails, use the HZ.
27da23d5
JH
308 * BeOS has those, but returns the wrong value.
309 * The HZ if not originally defined has been by now
310 * been defined as CLK_TCK, if available. */
dbc1d986 311#if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
5311654c
JH
312 PL_clocktick = sysconf(_SC_CLK_TCK);
313 if (PL_clocktick <= 0)
314#endif
315 PL_clocktick = HZ;
316
081fc587
AB
317 PL_stashcache = newHV();
318
d7aa5382
JP
319 PL_patchlevel = newSVpv(
320 Perl_form(aTHX_ "%d.%d.%d",
321 (int)PERL_REVISION,
322 (int)PERL_VERSION,
323 (int)PERL_SUBVERSION ), 0
324 );
325
27da23d5
JH
326#ifdef HAS_MMAP
327 if (!PL_mmap_page_size) {
328#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
329 {
330 SETERRNO(0, SS_NORMAL);
331# ifdef _SC_PAGESIZE
332 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
333# else
334 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
335# endif
336 if ((long) PL_mmap_page_size < 0) {
337 if (errno) {
338 SV *error = ERRSV;
339 char *msg;
340 STRLEN n_a;
341 (void) SvUPGRADE(error, SVt_PV);
342 msg = SvPVx(error, n_a);
343 Perl_croak(aTHX_ "panic: sysconf: %s", msg);
344 }
345 else
346 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
347 }
348 }
349#else
350# ifdef HAS_GETPAGESIZE
351 PL_mmap_page_size = getpagesize();
352# else
353# if defined(I_SYS_PARAM) && defined(PAGESIZE)
354 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
355# endif
356# endif
357#endif
358 if (PL_mmap_page_size <= 0)
359 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
360 (IV) PL_mmap_page_size);
361 }
362#endif /* HAS_MMAP */
363
364#if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
365 PL_timesbase.tms_utime = 0;
366 PL_timesbase.tms_stime = 0;
367 PL_timesbase.tms_cutime = 0;
368 PL_timesbase.tms_cstime = 0;
369#endif
370
8990e307 371 ENTER;
79072805
LW
372}
373
954c1994 374/*
62375a60
NIS
375=for apidoc nothreadhook
376
377Stub that provides thread hook for perl_destruct when there are
378no threads.
379
380=cut
381*/
382
383int
4e9e3734 384Perl_nothreadhook(pTHX)
62375a60
NIS
385{
386 return 0;
387}
388
389/*
954c1994
GS
390=for apidoc perl_destruct
391
392Shuts down a Perl interpreter. See L<perlembed>.
393
394=cut
395*/
396
31d77e54 397int
0cb96387 398perl_destruct(pTHXx)
79072805 399{
27da23d5 400 dVAR;
7c474504 401 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 402 HV *hv;
8990e307 403
7766f137
GS
404 /* wait for all pseudo-forked children to finish */
405 PERL_WAIT_FOR_CHILDREN;
406
3280af22 407 destruct_level = PL_perl_destruct_level;
4633a7c4
LW
408#ifdef DEBUGGING
409 {
410 char *s;
155aba94 411 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
e1ec3a88 412 const int i = atoi(s);
5f05dabc
PP
413 if (destruct_level < i)
414 destruct_level = i;
415 }
4633a7c4
LW
416 }
417#endif
418
27da23d5 419 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB
420 dJMPENV;
421 int x = 0;
422
423 JMPENV_PUSH(x);
424 if (PL_endav && !PL_minus_c)
425 call_list(PL_scopestack_ix, PL_endav);
426 JMPENV_POP;
26f423df 427 }
f3faeb53 428 LEAVE;
a0d0e21e
LW
429 FREETMPS;
430
e00b64d4 431 /* Need to flush since END blocks can produce output */
f13a2bc0 432 my_fflush_all();
e00b64d4 433
62375a60
NIS
434 if (CALL_FPTR(PL_threadhook)(aTHX)) {
435 /* Threads hook has vetoed further cleanup */
b47cad08 436 return STATUS_NATIVE_EXPORT;
62375a60
NIS
437 }
438
ff0cee69
PP
439 /* We must account for everything. */
440
441 /* Destroy the main CV and syntax tree */
3280af22 442 if (PL_main_root) {
4e380990
DM
443 /* ensure comppad/curpad to refer to main's pad */
444 if (CvPADLIST(PL_main_cv)) {
445 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
446 }
3280af22
NIS
447 op_free(PL_main_root);
448 PL_main_root = Nullop;
a0d0e21e 449 }
3280af22
NIS
450 PL_curcop = &PL_compiling;
451 PL_main_start = Nullop;
452 SvREFCNT_dec(PL_main_cv);
453 PL_main_cv = Nullcv;
24d3c518 454 PL_dirty = TRUE;
ff0cee69 455
13621cfb
NIS
456 /* Tell PerlIO we are about to tear things apart in case
457 we have layers which are using resources that should
458 be cleaned up now.
459 */
460
461 PerlIO_destruct(aTHX);
462
3280af22 463 if (PL_sv_objcount) {
a0d0e21e
LW
464 /*
465 * Try to destruct global references. We do this first so that the
466 * destructors and destructees still exist. Some sv's might remain.
467 * Non-referenced objects are on their own.
468 */
a0d0e21e 469 sv_clean_objs();
bf9cdc68 470 PL_sv_objcount = 0;
8990e307
LW
471 }
472
5cd24f17 473 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
474 SvREFCNT_dec(PL_warnhook);
475 PL_warnhook = Nullsv;
476 SvREFCNT_dec(PL_diehook);
477 PL_diehook = Nullsv;
5cd24f17 478
4b556e6c 479 /* call exit list functions */
3280af22 480 while (PL_exitlistlen-- > 0)
acfe0abc 481 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 482
3280af22 483 Safefree(PL_exitlist);
4b556e6c 484
1c4916e5
CB
485 PL_exitlist = NULL;
486 PL_exitlistlen = 0;
487
a0d0e21e 488 if (destruct_level == 0){
8990e307 489
a0d0e21e 490 DEBUG_P(debprofdump());
ac27b0f5 491
56a2bab7
NIS
492#if defined(PERLIO_LAYERS)
493 /* No more IO - including error messages ! */
494 PerlIO_cleanup(aTHX);
495#endif
496
a0d0e21e 497 /* The exit() function will do everything that needs doing. */
b47cad08 498 return STATUS_NATIVE_EXPORT;
a0d0e21e 499 }
5dd60ef7 500
551a8b83 501 /* jettison our possibly duplicated environment */
4b647fb0
DM
502 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
503 * so we certainly shouldn't free it here
504 */
2f42fcb0 505#ifndef PERL_MICRO
4b647fb0 506#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
50acdf95 507 if (environ != PL_origenviron && !PL_use_safe_putenv
4efc5df6
GS
508#ifdef USE_ITHREADS
509 /* only main thread can free environ[0] contents */
510 && PL_curinterp == aTHX
511#endif
512 )
513 {
551a8b83
JH
514 I32 i;
515
516 for (i = 0; environ[i]; i++)
4b420006 517 safesysfree(environ[i]);
0631ea03 518
4b420006
JH
519 /* Must use safesysfree() when working with environ. */
520 safesysfree(environ);
551a8b83
JH
521
522 environ = PL_origenviron;
523 }
524#endif
2f42fcb0 525#endif /* !PERL_MICRO */
551a8b83 526
804ffa60
DM
527 /* reset so print() ends up where we expect */
528 setdefout(Nullgv);
529
5f8cb046
DM
530#ifdef USE_ITHREADS
531 /* the syntax tree is shared between clones
532 * so op_free(PL_main_root) only ReREFCNT_dec's
533 * REGEXPs in the parent interpreter
534 * we need to manually ReREFCNT_dec for the clones
535 */
536 {
537 I32 i = AvFILLp(PL_regex_padav) + 1;
538 SV **ary = AvARRAY(PL_regex_padav);
539
540 while (i) {
35061a7e 541 SV *resv = ary[--i];
ba89bb6e 542 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM
543
544 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 545 /* this is PL_reg_curpm, already freed
35061a7e
DM
546 * flag is set in regexec.c:S_regtry
547 */
548 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 549 }
1cc8b4c5
AB
550 else if(SvREPADTMP(resv)) {
551 SvREPADTMP_off(resv);
552 }
35061a7e 553 else {
5f8cb046
DM
554 ReREFCNT_dec(re);
555 }
556 }
557 }
558 SvREFCNT_dec(PL_regex_padav);
559 PL_regex_padav = Nullav;
560 PL_regex_pad = NULL;
561#endif
562
081fc587
AB
563 SvREFCNT_dec((SV*) PL_stashcache);
564 PL_stashcache = NULL;
565
5f05dabc
PP
566 /* loosen bonds of global variables */
567
3280af22
NIS
568 if(PL_rsfp) {
569 (void)PerlIO_close(PL_rsfp);
570 PL_rsfp = Nullfp;
8ebc5c01
PP
571 }
572
573 /* Filters for program text */
3280af22
NIS
574 SvREFCNT_dec(PL_rsfp_filters);
575 PL_rsfp_filters = Nullav;
8ebc5c01
PP
576
577 /* switches */
3280af22
NIS
578 PL_preprocess = FALSE;
579 PL_minus_n = FALSE;
580 PL_minus_p = FALSE;
581 PL_minus_l = FALSE;
582 PL_minus_a = FALSE;
583 PL_minus_F = FALSE;
584 PL_doswitches = FALSE;
599cee73 585 PL_dowarn = G_WARN_OFF;
3280af22
NIS
586 PL_doextract = FALSE;
587 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
588 PL_unsafe = FALSE;
589
590 Safefree(PL_inplace);
591 PL_inplace = Nullch;
a7cb1f99 592 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
593
594 if (PL_e_script) {
595 SvREFCNT_dec(PL_e_script);
596 PL_e_script = Nullsv;
8ebc5c01
PP
597 }
598
bf9cdc68
RG
599 PL_perldb = 0;
600
8ebc5c01
PP
601 /* magical thingies */
602
7889fe52
NIS
603 SvREFCNT_dec(PL_ofs_sv); /* $, */
604 PL_ofs_sv = Nullsv;
5f05dabc 605
7889fe52
NIS
606 SvREFCNT_dec(PL_ors_sv); /* $\ */
607 PL_ors_sv = Nullsv;
8ebc5c01 608
3280af22
NIS
609 SvREFCNT_dec(PL_rs); /* $/ */
610 PL_rs = Nullsv;
dc92893f 611
d33b2eba
GS
612 PL_multiline = 0; /* $* */
613 Safefree(PL_osname); /* $^O */
614 PL_osname = Nullch;
5f05dabc 615
3280af22
NIS
616 SvREFCNT_dec(PL_statname);
617 PL_statname = Nullsv;
618 PL_statgv = Nullgv;
5f05dabc 619
8ebc5c01
PP
620 /* defgv, aka *_ should be taken care of elsewhere */
621
8ebc5c01 622 /* clean up after study() */
3280af22
NIS
623 SvREFCNT_dec(PL_lastscream);
624 PL_lastscream = Nullsv;
625 Safefree(PL_screamfirst);
626 PL_screamfirst = 0;
627 Safefree(PL_screamnext);
628 PL_screamnext = 0;
8ebc5c01 629
7d5ea4e7
GS
630 /* float buffer */
631 Safefree(PL_efloatbuf);
632 PL_efloatbuf = Nullch;
633 PL_efloatsize = 0;
634
8ebc5c01 635 /* startup and shutdown function lists */
3280af22 636 SvREFCNT_dec(PL_beginav);
5a837c8f 637 SvREFCNT_dec(PL_beginav_save);
3280af22 638 SvREFCNT_dec(PL_endav);
7d30b5c4 639 SvREFCNT_dec(PL_checkav);
ece599bd 640 SvREFCNT_dec(PL_checkav_save);
3280af22
NIS
641 SvREFCNT_dec(PL_initav);
642 PL_beginav = Nullav;
5a837c8f 643 PL_beginav_save = Nullav;
3280af22 644 PL_endav = Nullav;
7d30b5c4 645 PL_checkav = Nullav;
ece599bd 646 PL_checkav_save = Nullav;
3280af22 647 PL_initav = Nullav;
5618dfe8 648
8ebc5c01 649 /* shortcuts just get cleared */
3280af22 650 PL_envgv = Nullgv;
3280af22
NIS
651 PL_incgv = Nullgv;
652 PL_hintgv = Nullgv;
653 PL_errgv = Nullgv;
654 PL_argvgv = Nullgv;
655 PL_argvoutgv = Nullgv;
656 PL_stdingv = Nullgv;
bf49b057 657 PL_stderrgv = Nullgv;
3280af22
NIS
658 PL_last_in_gv = Nullgv;
659 PL_replgv = Nullgv;
bf9cdc68
RG
660 PL_DBgv = Nullgv;
661 PL_DBline = Nullgv;
662 PL_DBsub = Nullgv;
663 PL_DBsingle = Nullsv;
664 PL_DBtrace = Nullsv;
665 PL_DBsignal = Nullsv;
666 PL_DBassertion = Nullsv;
667 PL_DBcv = Nullcv;
668 PL_dbargs = Nullav;
5c831c24 669 PL_debstash = Nullhv;
8ebc5c01 670
7a1c5554
GS
671 SvREFCNT_dec(PL_argvout_stack);
672 PL_argvout_stack = Nullav;
8ebc5c01 673
5c831c24
GS
674 SvREFCNT_dec(PL_modglobal);
675 PL_modglobal = Nullhv;
676 SvREFCNT_dec(PL_preambleav);
677 PL_preambleav = Nullav;
678 SvREFCNT_dec(PL_subname);
679 PL_subname = Nullsv;
680 SvREFCNT_dec(PL_linestr);
681 PL_linestr = Nullsv;
682 SvREFCNT_dec(PL_pidstatus);
683 PL_pidstatus = Nullhv;
684 SvREFCNT_dec(PL_toptarget);
685 PL_toptarget = Nullsv;
686 SvREFCNT_dec(PL_bodytarget);
687 PL_bodytarget = Nullsv;
688 PL_formtarget = Nullsv;
689
d33b2eba 690 /* free locale stuff */
b9582b6a 691#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
692 Safefree(PL_collation_name);
693 PL_collation_name = Nullch;
b9582b6a 694#endif
d33b2eba 695
b9582b6a 696#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
697 Safefree(PL_numeric_name);
698 PL_numeric_name = Nullch;
a453c169 699 SvREFCNT_dec(PL_numeric_radix_sv);
bf9cdc68 700 PL_numeric_radix_sv = Nullsv;
b9582b6a 701#endif
d33b2eba 702
5c831c24
GS
703 /* clear utf8 character classes */
704 SvREFCNT_dec(PL_utf8_alnum);
705 SvREFCNT_dec(PL_utf8_alnumc);
706 SvREFCNT_dec(PL_utf8_ascii);
707 SvREFCNT_dec(PL_utf8_alpha);
708 SvREFCNT_dec(PL_utf8_space);
709 SvREFCNT_dec(PL_utf8_cntrl);
710 SvREFCNT_dec(PL_utf8_graph);
711 SvREFCNT_dec(PL_utf8_digit);
712 SvREFCNT_dec(PL_utf8_upper);
713 SvREFCNT_dec(PL_utf8_lower);
714 SvREFCNT_dec(PL_utf8_print);
715 SvREFCNT_dec(PL_utf8_punct);
716 SvREFCNT_dec(PL_utf8_xdigit);
717 SvREFCNT_dec(PL_utf8_mark);
718 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 719 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 720 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 721 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH
722 SvREFCNT_dec(PL_utf8_idstart);
723 SvREFCNT_dec(PL_utf8_idcont);
5c831c24
GS
724 PL_utf8_alnum = Nullsv;
725 PL_utf8_alnumc = Nullsv;
726 PL_utf8_ascii = Nullsv;
727 PL_utf8_alpha = Nullsv;
728 PL_utf8_space = Nullsv;
729 PL_utf8_cntrl = Nullsv;
730 PL_utf8_graph = Nullsv;
731 PL_utf8_digit = Nullsv;
732 PL_utf8_upper = Nullsv;
733 PL_utf8_lower = Nullsv;
734 PL_utf8_print = Nullsv;
735 PL_utf8_punct = Nullsv;
736 PL_utf8_xdigit = Nullsv;
737 PL_utf8_mark = Nullsv;
738 PL_utf8_toupper = Nullsv;
739 PL_utf8_totitle = Nullsv;
740 PL_utf8_tolower = Nullsv;
b4e400f9 741 PL_utf8_tofold = Nullsv;
82686b01
JH
742 PL_utf8_idstart = Nullsv;
743 PL_utf8_idcont = Nullsv;
5c831c24 744
971a9dd3
GS
745 if (!specialWARN(PL_compiling.cop_warnings))
746 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 747 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
748 if (!specialCopIO(PL_compiling.cop_io))
749 SvREFCNT_dec(PL_compiling.cop_io);
750 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS
751 CopFILE_free(&PL_compiling);
752 CopSTASH_free(&PL_compiling);
5c831c24 753
a0d0e21e 754 /* Prepare to destruct main symbol table. */
5f05dabc 755
3280af22
NIS
756 hv = PL_defstash;
757 PL_defstash = 0;
a0d0e21e 758 SvREFCNT_dec(hv);
5c831c24
GS
759 SvREFCNT_dec(PL_curstname);
760 PL_curstname = Nullsv;
a0d0e21e 761
5a844595
GS
762 /* clear queued errors */
763 SvREFCNT_dec(PL_errors);
764 PL_errors = Nullsv;
765
a0d0e21e 766 FREETMPS;
0453d815 767 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 768 if (PL_scopestack_ix != 0)
9014280d 769 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 770 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
771 (long)PL_scopestack_ix);
772 if (PL_savestack_ix != 0)
9014280d 773 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 774 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
775 (long)PL_savestack_ix);
776 if (PL_tmps_floor != -1)
9014280d 777 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 778 (long)PL_tmps_floor + 1);
a0d0e21e 779 if (cxstack_ix != -1)
9014280d 780 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 781 (long)cxstack_ix + 1);
a0d0e21e 782 }
8990e307
LW
783
784 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 785 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 786 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
787
788 /* the 2 is for PL_fdpid and PL_strtab */
789 while (PL_sv_count > 2 && sv_clean_all())
790 ;
791
d33b2eba
GS
792 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
793 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
794 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
795 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 796
d4777f27
GS
797 AvREAL_off(PL_fdpid); /* no surviving entries */
798 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
799 PL_fdpid = Nullav;
800
6c644e78
GS
801#ifdef HAVE_INTERP_INTERN
802 sys_intern_clear();
803#endif
804
6e72f9df
PP
805 /* Destruct the global string table. */
806 {
807 /* Yell and reset the HeVAL() slots that are still holding refcounts,
808 * so that sv_free() won't fail on them.
809 */
810 I32 riter;
811 I32 max;
812 HE *hent;
813 HE **array;
814
815 riter = 0;
3280af22
NIS
816 max = HvMAX(PL_strtab);
817 array = HvARRAY(PL_strtab);
6e72f9df
PP
818 hent = array[0];
819 for (;;) {
0453d815 820 if (hent && ckWARN_d(WARN_INTERNAL)) {
9014280d 821 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 822 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
823 HeVAL(hent) - Nullsv, HeKEY(hent));
824 HeVAL(hent) = Nullsv;
825 hent = HeNEXT(hent);
826 }
827 if (!hent) {
828 if (++riter > max)
829 break;
830 hent = array[riter];
831 }
832 }
833 }
3280af22 834 SvREFCNT_dec(PL_strtab);
6e72f9df 835
e652bb2f 836#ifdef USE_ITHREADS
a0739874
DM
837 /* free the pointer table used for cloning */
838 ptr_table_free(PL_ptr_table);
bf9cdc68 839 PL_ptr_table = (PTR_TBL_t*)NULL;
53186e96 840#endif
a0739874 841
d33b2eba
GS
842 /* free special SVs */
843
844 SvREFCNT(&PL_sv_yes) = 0;
845 sv_clear(&PL_sv_yes);
846 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 847 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
848
849 SvREFCNT(&PL_sv_no) = 0;
850 sv_clear(&PL_sv_no);
851 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 852 SvFLAGS(&PL_sv_no) = 0;
01724ea0 853
9f375a43
DM
854 {
855 int i;
856 for (i=0; i<=2; i++) {
857 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
858 sv_clear(PERL_DEBUG_PAD(i));
859 SvANY(PERL_DEBUG_PAD(i)) = NULL;
860 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
861 }
862 }
863
0453d815 864 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 865 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 866
eba0f806
DM
867#ifdef DEBUG_LEAKING_SCALARS
868 if (PL_sv_count != 0) {
869 SV* sva;
870 SV* sv;
871 register SV* svend;
872
873 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
874 svend = &sva[SvREFCNT(sva)];
875 for (sv = sva + 1; sv < svend; ++sv) {
876 if (SvTYPE(sv) != SVTYPEMASK) {
a548cda8
DM
877 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
878 " flags=0x08%"UVxf
fd0854ff
DM
879 " refcnt=%"UVuf pTHX__FORMAT "\n"
880 "\tallocated at %s:%d %s %s%s\n",
881 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
882 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
883 sv->sv_debug_line,
884 sv->sv_debug_inpad ? "for" : "by",
885 sv->sv_debug_optype ?
886 PL_op_name[sv->sv_debug_optype]: "(none)",
887 sv->sv_debug_cloned ? " (cloned)" : ""
888 );
eba0f806
DM
889 }
890 }
891 }
892 }
893#endif
bf9cdc68 894 PL_sv_count = 0;
eba0f806
DM
895
896
56a2bab7 897#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
898 /* No more IO - including error messages ! */
899 PerlIO_cleanup(aTHX);
900#endif
901
9f4bd222
NIS
902 /* sv_undef needs to stay immortal until after PerlIO_cleanup
903 as currently layers use it rather than Nullsv as a marker
904 for no arg - and will try and SvREFCNT_dec it.
905 */
906 SvREFCNT(&PL_sv_undef) = 0;
907 SvREADONLY_off(&PL_sv_undef);
908
3280af22 909 Safefree(PL_origfilename);
bf9cdc68 910 PL_origfilename = Nullch;
3280af22 911 Safefree(PL_reg_start_tmp);
bf9cdc68
RG
912 PL_reg_start_tmp = (char**)NULL;
913 PL_reg_start_tmpl = 0;
5c5e4c24
IZ
914 if (PL_reg_curpm)
915 Safefree(PL_reg_curpm);
82ba1be6 916 Safefree(PL_reg_poscache);
dd28f7bb 917 free_tied_hv_pool();
3280af22 918 Safefree(PL_op_mask);
cf36064f 919 Safefree(PL_psig_ptr);
bf9cdc68 920 PL_psig_ptr = (SV**)NULL;
cf36064f 921 Safefree(PL_psig_name);
bf9cdc68 922 PL_psig_name = (SV**)NULL;
2c2666fc 923 Safefree(PL_bitcount);
bf9cdc68 924 PL_bitcount = Nullch;
ce08f86c 925 Safefree(PL_psig_pend);
bf9cdc68
RG
926 PL_psig_pend = (int*)NULL;
927 PL_formfeed = Nullsv;
928 Safefree(PL_ofmt);
929 PL_ofmt = Nullch;
6e72f9df 930 nuke_stacks();
bf9cdc68
RG
931 PL_tainting = FALSE;
932 PL_taint_warn = FALSE;
3280af22 933 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
bf9cdc68 934 PL_debug = 0;
ac27b0f5 935
a0d0e21e 936 DEBUG_P(debprofdump());
d33b2eba 937
e5dd39fc 938#ifdef USE_REENTRANT_API
10bc17b6 939 Perl_reentrant_free(aTHX);
e5dd39fc
AB
940#endif
941
612f20c3
GS
942 sv_free_arenas();
943
fc36a67e
PP
944 /* As the absolutely last thing, free the non-arena SV for mess() */
945
3280af22 946 if (PL_mess_sv) {
9c63abab
GS
947 /* it could have accumulated taint magic */
948 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
949 MAGIC* mg;
950 MAGIC* moremagic;
951 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
952 moremagic = mg->mg_moremagic;
14befaf4
DM
953 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
954 && mg->mg_len >= 0)
9c63abab
GS
955 Safefree(mg->mg_ptr);
956 Safefree(mg);
957 }
958 }
fc36a67e 959 /* we know that type >= SVt_PV */
8bd4d4c5 960 SvPV_free(PL_mess_sv);
3280af22
NIS
961 Safefree(SvANY(PL_mess_sv));
962 Safefree(PL_mess_sv);
963 PL_mess_sv = Nullsv;
fc36a67e 964 }
31d77e54 965 return STATUS_NATIVE_EXPORT;
79072805
LW
966}
967
954c1994
GS
968/*
969=for apidoc perl_free
970
971Releases a Perl interpreter. See L<perlembed>.
972
973=cut
974*/
975
79072805 976void
0cb96387 977perl_free(pTHXx)
79072805 978{
acfe0abc 979#if defined(WIN32) || defined(NETWARE)
ce3e5b80 980# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
981# ifdef NETWARE
982 void *host = nw_internal_host;
983# else
984 void *host = w32_internal_host;
985# endif
ce3e5b80 986 PerlMem_free(aTHXx);
acfe0abc 987# ifdef NETWARE
011f1a1a 988 nw_delete_internal_host(host);
acfe0abc
GS
989# else
990 win32_delete_internal_host(host);
991# endif
1c0ca838
GS
992# else
993 PerlMem_free(aTHXx);
994# endif
acfe0abc
GS
995#else
996 PerlMem_free(aTHXx);
76e3520e 997#endif
79072805
LW
998}
999
aebd1ac7
GA
1000#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1001/* provide destructors to clean up the thread key when libperl is unloaded */
1002#ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1003
1004#if defined(__hpux) && !defined(__GNUC__)
1005#pragma fini "perl_fini"
1006#endif
1007
1008#if defined(__GNUC__) && defined(__attribute__)
1009/* want to make sure __attribute__ works here even
1010 * for -Dd_attribut=undef builds.
1011 */
1012#undef __attribute__
1013#endif
1014
1015static void __attribute__((destructor))
de009b76 1016perl_fini(void)
aebd1ac7 1017{
27da23d5 1018 dVAR;
aebd1ac7
GA
1019 if (PL_curinterp)
1020 FREE_THREAD_KEY;
1021}
1022
1023#endif /* WIN32 */
1024#endif /* THREADS */
1025
4b556e6c 1026void
864dbfa3 1027Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 1028{
3280af22
NIS
1029 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1030 PL_exitlist[PL_exitlistlen].fn = fn;
1031 PL_exitlist[PL_exitlistlen].ptr = ptr;
1032 ++PL_exitlistlen;
4b556e6c
JD
1033}
1034
56cf6df8
RGS
1035#ifdef HAS_PROCSELFEXE
1036/* This is a function so that we don't hold on to MAXPATHLEN
1037 bytes of stack longer than necessary
1038 */
1039STATIC void
e1ec3a88 1040S_procself_val(pTHX_ SV *sv, const char *arg0)
56cf6df8
RGS
1041{
1042 char buf[MAXPATHLEN];
1043 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1044
1045 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1046 includes a spurious NUL which will cause $^X to fail in system
1047 or backticks (this will prevent extensions from being built and
1048 many tests from working). readlink is not meant to add a NUL.
1049 Normal readlink works fine.
1050 */
1051 if (len > 0 && buf[len-1] == '\0') {
1052 len--;
1053 }
1054
1055 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1056 returning the text "unknown" from the readlink rather than the path
1057 to the executable (or returning an error from the readlink). Any valid
1058 path has a '/' in it somewhere, so use that to validate the result.
1059 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1060 */
1061 if (len > 0 && memchr(buf, '/', len)) {
1062 sv_setpvn(sv,buf,len);
1063 }
1064 else {
1065 sv_setpv(sv,arg0);
1066 }
1067}
1068#endif /* HAS_PROCSELFEXE */
b7975bdd
NC
1069
1070STATIC void
1071S_set_caret_X(pTHX) {
1072 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1073 if (tmpgv) {
1074#ifdef HAS_PROCSELFEXE
1075 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1076#else
1077#ifdef OS2
1078 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
1079#else
1080 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
1081#endif
1082#endif
1083 }
1084}
1085
954c1994
GS
1086/*
1087=for apidoc perl_parse
1088
1089Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1090
1091=cut
1092*/
1093
79072805 1094int
0cb96387 1095perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 1096{
27da23d5 1097 dVAR;
6224f72b 1098 I32 oldscope;
6224f72b 1099 int ret;
db36c5a1 1100 dJMPENV;
8d063cd8 1101
a687059c
LW
1102#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1103#ifdef IAMSUID
1104#undef IAMSUID
cea2e8a9 1105 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c 1106setuid perl scripts securely.\n");
ae3f3efd 1107#endif /* IAMSUID */
a687059c
LW
1108#endif
1109
b0891165
JH
1110#if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1111 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
103dd899 1112 * This MUST be done before any hash stores or fetches take place.
008fb0c0
NC
1113 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1114 * yourself, it is your responsibility to provide a good random seed!
830b38bd 1115 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
008fb0c0
NC
1116 if (!PL_rehash_seed_set)
1117 PL_rehash_seed = get_hash_seed();
b0891165 1118 {
bed60192
JH
1119 char *s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1120
1121 if (s) {
1122 int i = atoi(s);
1123
1124 if (i == 1)
1125 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n",
008fb0c0 1126 PL_rehash_seed);
bed60192 1127 }
b0891165
JH
1128 }
1129#endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1130
3280af22 1131 PL_origargc = argc;
e2975953 1132 PL_origargv = argv;
a0d0e21e 1133
54bfe034 1134 {
3cb9023d
JH
1135 /* Set PL_origalen be the sum of the contiguous argv[]
1136 * elements plus the size of the env in case that it is
e9137a8e 1137 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
3cb9023d
JH
1138 * as the maximum modifiable length of $0. In the worst case
1139 * the area we are able to modify is limited to the size of
43c32782 1140 * the original argv[0]. (See below for 'contiguous', though.)
3cb9023d 1141 * --jhi */
e1ec3a88 1142 const char *s = NULL;
54bfe034 1143 int i;
7d8e7db3
JH
1144 UV mask =
1145 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
43c32782
JH
1146 /* Do the mask check only if the args seem like aligned. */
1147 UV aligned =
1148 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1149
1150 /* See if all the arguments are contiguous in memory. Note
1151 * that 'contiguous' is a loose term because some platforms
1152 * align the argv[] and the envp[]. If the arguments look
1153 * like non-aligned, assume that they are 'strictly' or
1154 * 'traditionally' contiguous. If the arguments look like
1155 * aligned, we just check that they are within aligned
1156 * PTRSIZE bytes. As long as no system has something bizarre
1157 * like the argv[] interleaved with some other data, we are
1158 * fine. (Did I just evoke Murphy's Law?) --jhi */
c8941eeb
JH
1159 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1160 while (*s) s++;
1161 for (i = 1; i < PL_origargc; i++) {
1162 if ((PL_origargv[i] == s + 1
43c32782 1163#ifdef OS2
c8941eeb 1164 || PL_origargv[i] == s + 2
43c32782 1165#endif
c8941eeb
JH
1166 )
1167 ||
1168 (aligned &&
1169 (PL_origargv[i] > s &&
1170 PL_origargv[i] <=
1171 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1172 )
1173 {
1174 s = PL_origargv[i];
1175 while (*s) s++;
1176 }
1177 else
1178 break;
54bfe034 1179 }
54bfe034 1180 }
3cb9023d 1181 /* Can we grab env area too to be used as the area for $0? */
43c32782
JH
1182 if (PL_origenviron) {
1183 if ((PL_origenviron[0] == s + 1
1184#ifdef OS2
1185 || (PL_origenviron[0] == s + 9 && (s += 8))
1186#endif
1187 )
1188 ||
1189 (aligned &&
1190 (PL_origenviron[0] > s &&
1191 PL_origenviron[0] <=
1192 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1193 )
1194 {
1195#ifndef OS2
1196 s = PL_origenviron[0];
1197 while (*s) s++;
1198#endif
1199 my_setenv("NoNe SuCh", Nullch);
1200 /* Force copy of environment. */
1201 for (i = 1; PL_origenviron[i]; i++) {
1202 if (PL_origenviron[i] == s + 1
1203 ||
1204 (aligned &&
1205 (PL_origenviron[i] > s &&
1206 PL_origenviron[i] <=
1207 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1208 )
1209 {
1210 s = PL_origenviron[i];
1211 while (*s) s++;
1212 }
1213 else
1214 break;
54bfe034 1215 }
43c32782 1216 }
54bfe034 1217 }
284e1220 1218 PL_origalen = s - PL_origargv[0] + 1;
54bfe034
JH
1219 }
1220
3280af22 1221 if (PL_do_undump) {
a0d0e21e
LW
1222
1223 /* Come here if running an undumped a.out. */
1224
3280af22
NIS
1225 PL_origfilename = savepv(argv[0]);
1226 PL_do_undump = FALSE;
a0d0e21e 1227 cxstack_ix = -1; /* start label stack again */
748a9306 1228 init_ids();
b7975bdd
NC
1229 assert (!PL_tainted);
1230 TAINT;
1231 S_set_caret_X(aTHX);
1232 TAINT_NOT;
a0d0e21e
LW
1233 init_postdump_symbols(argc,argv,env);
1234 return 0;
1235 }
1236
3280af22 1237 if (PL_main_root) {
3280af22
NIS
1238 op_free(PL_main_root);
1239 PL_main_root = Nullop;
ff0cee69 1240 }
3280af22
NIS
1241 PL_main_start = Nullop;
1242 SvREFCNT_dec(PL_main_cv);
1243 PL_main_cv = Nullcv;
79072805 1244
3280af22
NIS
1245 time(&PL_basetime);
1246 oldscope = PL_scopestack_ix;
599cee73 1247 PL_dowarn = G_WARN_OFF;
f86702cc 1248
14dd3ad8 1249 JMPENV_PUSH(ret);
6224f72b 1250 switch (ret) {
312caa8e 1251 case 0:
14dd3ad8 1252 parse_body(env,xsinit);
7d30b5c4
GS
1253 if (PL_checkav)
1254 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1255 ret = 0;
1256 break;
6224f72b
GS
1257 case 1:
1258 STATUS_ALL_FAILURE;
1259 /* FALL THROUGH */
1260 case 2:
1261 /* my_exit() was called */
3280af22 1262 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1263 LEAVE;
1264 FREETMPS;
3280af22 1265 PL_curstash = PL_defstash;
7d30b5c4
GS
1266 if (PL_checkav)
1267 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1268 ret = STATUS_NATIVE_EXPORT;
1269 break;
6224f72b 1270 case 3:
bf49b057 1271 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1272 ret = 1;
1273 break;
6224f72b 1274 }
14dd3ad8
GS
1275 JMPENV_POP;
1276 return ret;
1277}
1278
312caa8e 1279STATIC void *
14dd3ad8 1280S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1281{
27da23d5 1282 dVAR;
312caa8e 1283 int argc = PL_origargc;
8f42b153 1284 char **argv = PL_origargv;
e1ec3a88 1285 const char *scriptname = NULL;
312caa8e 1286 VOL bool dosearch = FALSE;
e1ec3a88 1287 const char *validarg = "";
312caa8e
CS
1288 register SV *sv;
1289 register char *s;
e1ec3a88 1290 const char *cddir = Nullch;
20ef40cf 1291 bool minus_f = FALSE;
312caa8e 1292
ae3f3efd
PS
1293 PL_fdscript = -1;
1294 PL_suidscript = -1;
3280af22 1295 sv_setpvn(PL_linestr,"",0);
79cb57f6 1296 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1297 SAVEFREESV(sv);
1298 init_main_stash();
54310121 1299
6224f72b
GS
1300 for (argc--,argv++; argc > 0; argc--,argv++) {
1301 if (argv[0][0] != '-' || !argv[0][1])
1302 break;
1303#ifdef DOSUID
1304 if (*validarg)
1305 validarg = " PHOOEY ";
1306 else
1307 validarg = argv[0];
ae3f3efd
PS
1308 /*
1309 * Can we rely on the kernel to start scripts with argv[1] set to
1310 * contain all #! line switches (the whole line)? (argv[0] is set to
1311 * the interpreter name, argv[2] to the script name; argv[3] and
1312 * above may contain other arguments.)
1313 */
13281fa4 1314#endif
6224f72b
GS
1315 s = argv[0]+1;
1316 reswitch:
1317 switch (*s) {
729a02f2 1318 case 'C':
1d5472a9
GS
1319#ifndef PERL_STRICT_CR
1320 case '\r':
1321#endif
6224f72b
GS
1322 case ' ':
1323 case '0':
1324 case 'F':
1325 case 'a':
1326 case 'c':
1327 case 'd':
1328 case 'D':
1329 case 'h':
1330 case 'i':
1331 case 'l':
1332 case 'M':
1333 case 'm':
1334 case 'n':
1335 case 'p':
1336 case 's':
1337 case 'u':
1338 case 'U':
1339 case 'v':
599cee73
PM
1340 case 'W':
1341 case 'X':
6224f72b 1342 case 'w':
06492da6 1343 case 'A':
155aba94 1344 if ((s = moreswitches(s)))
6224f72b
GS
1345 goto reswitch;
1346 break;
33b78306 1347
1dbad523 1348 case 't':
22f7c9c9 1349 CHECK_MALLOC_TOO_LATE_FOR('t');
317ea90d
MS
1350 if( !PL_tainting ) {
1351 PL_taint_warn = TRUE;
1352 PL_tainting = TRUE;
1353 }
1354 s++;
1355 goto reswitch;
6224f72b 1356 case 'T':
22f7c9c9 1357 CHECK_MALLOC_TOO_LATE_FOR('T');
3280af22 1358 PL_tainting = TRUE;
317ea90d 1359 PL_taint_warn = FALSE;
6224f72b
GS
1360 s++;
1361 goto reswitch;
f86702cc 1362
6224f72b 1363 case 'e':
bf4acbe4
GS
1364#ifdef MACOS_TRADITIONAL
1365 /* ignore -e for Dev:Pseudo argument */
1366 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
e55ac0fa 1367 break;
bf4acbe4 1368#endif
ae3f3efd 1369 forbid_setid("-e");
3280af22 1370 if (!PL_e_script) {
79cb57f6 1371 PL_e_script = newSVpvn("",0);
0cb96387 1372 filter_add(read_e_script, NULL);
6224f72b
GS
1373 }
1374 if (*++s)
3280af22 1375 sv_catpv(PL_e_script, s);
6224f72b 1376 else if (argv[1]) {
3280af22 1377 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1378 argc--,argv++;
1379 }
1380 else
cea2e8a9 1381 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1382 sv_catpv(PL_e_script, "\n");
6224f72b 1383 break;
afe37c7d 1384
20ef40cf
GA
1385 case 'f':
1386 minus_f = TRUE;
1387 s++;
1388 goto reswitch;
1389
6224f72b
GS
1390 case 'I': /* -I handled both here and in moreswitches() */
1391 forbid_setid("-I");
1392 if (!*++s && (s=argv[1]) != Nullch) {
1393 argc--,argv++;
1394 }
6224f72b 1395 if (s && *s) {
0df16ed7
GS
1396 char *p;
1397 STRLEN len = strlen(s);
1398 p = savepvn(s, len);
88fe16b2 1399 incpush(p, TRUE, TRUE, FALSE, FALSE);
0df16ed7
GS
1400 sv_catpvn(sv, "-I", 2);
1401 sv_catpvn(sv, p, len);
1402 sv_catpvn(sv, " ", 1);
6224f72b 1403 Safefree(p);
0df16ed7
GS
1404 }
1405 else
a67e862a 1406 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1407 break;
1408 case 'P':
1409 forbid_setid("-P");
3280af22 1410 PL_preprocess = TRUE;
6224f72b
GS
1411 s++;
1412 goto reswitch;
1413 case 'S':
1414 forbid_setid("-S");
1415 dosearch = TRUE;
1416 s++;
1417 goto reswitch;
1418 case 'V':
3280af22
NIS
1419 if (!PL_preambleav)
1420 PL_preambleav = newAV();
1421 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1422 if (*++s != ':') {
efcaa95b
YST
1423 STRLEN opts;
1424
3280af22 1425 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1426#ifdef VMS
6b88bc9c 1427 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1428#else
3280af22 1429 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1430#endif
efcaa95b
YST
1431 opts = SvCUR(PL_Sv);
1432
3280af22 1433 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1434# ifdef DEBUGGING
3280af22 1435 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1436# endif
6224f72b 1437# ifdef MULTIPLICITY
8f872242 1438 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1439# endif
4d1ff10f
AB
1440# ifdef USE_5005THREADS
1441 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1442# endif
ac5e8965
JH
1443# ifdef USE_ITHREADS
1444 sv_catpv(PL_Sv," USE_ITHREADS");
1445# endif
10cc9d2a
JH
1446# ifdef USE_64_BIT_INT
1447 sv_catpv(PL_Sv," USE_64_BIT_INT");
1448# endif
1449# ifdef USE_64_BIT_ALL
1450 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1451# endif
1452# ifdef USE_LONG_DOUBLE
1453 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1454# endif
53430762
JH
1455# ifdef USE_LARGE_FILES
1456 sv_catpv(PL_Sv," USE_LARGE_FILES");
1457# endif
ac5e8965
JH
1458# ifdef USE_SOCKS
1459 sv_catpv(PL_Sv," USE_SOCKS");
1460# endif
20ef40cf
GA
1461# ifdef USE_SITECUSTOMIZE
1462 sv_catpv(PL_Sv," USE_SITECUSTOMIZE");
1463# endif
b363f7ed
GS
1464# ifdef PERL_IMPLICIT_CONTEXT
1465 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1466# endif
1467# ifdef PERL_IMPLICIT_SYS
1468 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1469# endif
efcaa95b
YST
1470
1471 while (SvCUR(PL_Sv) > opts+76) {
1472 /* find last space after "options: " and before col 76 */
1473
dd374669
AL
1474 const char *space;
1475 char *pv = SvPV_nolen(PL_Sv);
1476 const char c = pv[opts+76];
efcaa95b
YST
1477 pv[opts+76] = '\0';
1478 space = strrchr(pv+opts+26, ' ');
1479 pv[opts+76] = c;
1480 if (!space) break; /* "Can't happen" */
1481
1482 /* break the line before that space */
1483
1484 opts = space - pv;
1485 sv_insert(PL_Sv, opts, 0,
1486 "\\n ", 25);
1487 }
1488
3280af22 1489 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1490
6224f72b
GS
1491#if defined(LOCAL_PATCH_COUNT)
1492 if (LOCAL_PATCH_COUNT > 0) {
1493 int i;
3280af22 1494 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1495 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1496 if (PL_localpatches[i])
acb03d05
AB
1497 Perl_sv_catpvf(aTHX_ PL_Sv,"q%c\t%s\n%c,",
1498 0, PL_localpatches[i], 0);
6224f72b
GS
1499 }
1500 }
1501#endif
cea2e8a9 1502 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1503#ifdef __DATE__
1504# ifdef __TIME__
cea2e8a9 1505 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1506# else
cea2e8a9 1507 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1508# endif
1509#endif
3280af22 1510 sv_catpv(PL_Sv, "; \
6224f72b 1511$\"=\"\\n \"; \
69fcd688
JH
1512@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1513#ifdef __CYGWIN__
1514 sv_catpv(PL_Sv,"\
1515push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1516#endif
1517 sv_catpv(PL_Sv, "\
6224f72b
GS
1518print \" \\%ENV:\\n @env\\n\" if @env; \
1519print \" \\@INC:\\n @INC\\n\";");
1520 }
1521 else {
3280af22
NIS
1522 PL_Sv = newSVpv("config_vars(qw(",0);
1523 sv_catpv(PL_Sv, ++s);
1524 sv_catpv(PL_Sv, "))");
6224f72b
GS
1525 s += strlen(s);
1526 }
3280af22 1527 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1528 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1529 goto reswitch;
1530 case 'x':
3280af22 1531 PL_doextract = TRUE;
6224f72b
GS
1532 s++;
1533 if (*s)
f4c556ac 1534 cddir = s;
6224f72b
GS
1535 break;
1536 case 0:
1537 break;
1538 case '-':
1539 if (!*++s || isSPACE(*s)) {
1540 argc--,argv++;
1541 goto switch_end;
1542 }
1543 /* catch use of gnu style long options */
1544 if (strEQ(s, "version")) {
dd374669 1545 s = (char *)"v";
6224f72b
GS
1546 goto reswitch;
1547 }
1548 if (strEQ(s, "help")) {
dd374669 1549 s = (char *)"h";
6224f72b
GS
1550 goto reswitch;
1551 }
1552 s--;
1553 /* FALL THROUGH */
1554 default:
cea2e8a9 1555 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1556 }
1557 }
6224f72b 1558 switch_end:
54310121 1559
f675dbe5
CB
1560 if (
1561#ifndef SECURE_INTERNAL_GETENV
1562 !PL_tainting &&
1563#endif
cf756827 1564 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1565 {
e1ec3a88 1566 const char *popt = s;
74288ac8
GS
1567 while (isSPACE(*s))
1568 s++;
317ea90d 1569 if (*s == '-' && *(s+1) == 'T') {
22f7c9c9 1570 CHECK_MALLOC_TOO_LATE_FOR('T');
74288ac8 1571 PL_tainting = TRUE;
317ea90d
MS
1572 PL_taint_warn = FALSE;
1573 }
74288ac8 1574 else {
cf756827 1575 char *popt_copy = Nullch;
74288ac8 1576 while (s && *s) {
4ea8f8fb 1577 char *d;
74288ac8
GS
1578 while (isSPACE(*s))
1579 s++;
1580 if (*s == '-') {
1581 s++;
1582 if (isSPACE(*s))
1583 continue;
1584 }
4ea8f8fb 1585 d = s;
74288ac8
GS
1586 if (!*s)
1587 break;
06492da6 1588 if (!strchr("DIMUdmtwA", *s))
cea2e8a9 1589 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1590 while (++s && *s) {
1591 if (isSPACE(*s)) {
cf756827
GS
1592 if (!popt_copy) {
1593 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1594 s = popt_copy + (s - popt);
1595 d = popt_copy + (d - popt);
1596 }
4ea8f8fb
MS
1597 *s++ = '\0';
1598 break;
1599 }
1600 }
1c4db469 1601 if (*d == 't') {
317ea90d
MS
1602 if( !PL_tainting ) {
1603 PL_taint_warn = TRUE;
1604 PL_tainting = TRUE;
1605 }
1c4db469
RGS
1606 } else {
1607 moreswitches(d);
1608 }
6224f72b 1609 }
6224f72b
GS
1610 }
1611 }
a0d0e21e 1612
20ef40cf
GA
1613#ifdef USE_SITECUSTOMIZE
1614 if (!minus_f) {
1615 if (!PL_preambleav)
1616 PL_preambleav = newAV();
1617 av_unshift(PL_preambleav, 1);
1618 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1619 }
1620#endif
1621
317ea90d
MS
1622 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1623 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1624 }
1625
6224f72b
GS
1626 if (!scriptname)
1627 scriptname = argv[0];
3280af22 1628 if (PL_e_script) {
6224f72b
GS
1629 argc++,argv--;
1630 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1631 }
1632 else if (scriptname == Nullch) {
1633#ifdef MSDOS
1634 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1635 moreswitches("h");
1636#endif
1637 scriptname = "-";
1638 }
1639
b7975bdd
NC
1640 /* Set $^X early so that it can be used for relocatable paths in @INC */
1641 assert (!PL_tainted);
1642 TAINT;
1643 S_set_caret_X(aTHX);
1644 TAINT_NOT;
6224f72b
GS
1645 init_perllib();
1646
c5cccb17 1647 open_script(scriptname,dosearch,sv);
6224f72b 1648
c5cccb17 1649 validate_suid(validarg, scriptname);
6224f72b 1650
64ca3a65 1651#ifndef PERL_MICRO
0b5b802d
GS
1652#if defined(SIGCHLD) || defined(SIGCLD)
1653 {
1654#ifndef SIGCHLD
1655# define SIGCHLD SIGCLD
1656#endif
1657 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1658 if (sigstate == SIG_IGN) {
1659 if (ckWARN(WARN_SIGNAL))
9014280d 1660 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
0b5b802d
GS
1661 "Can't ignore signal CHLD, forcing to default");
1662 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1663 }
1664 }
1665#endif
64ca3a65 1666#endif
0b5b802d 1667
bf4acbe4
GS
1668#ifdef MACOS_TRADITIONAL
1669 if (PL_doextract || gMacPerl_AlwaysExtract) {
1670#else
f4c556ac 1671 if (PL_doextract) {
bf4acbe4 1672#endif
6224f72b 1673 find_beginning();
dd374669 1674 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
f4c556ac
GS
1675 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1676
1677 }
6224f72b 1678
3280af22
NIS
1679 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1680 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1681 CvUNIQUE_on(PL_compcv);
1682
dd2155a4 1683 CvPADLIST(PL_compcv) = pad_new(0);
4d1ff10f 1684#ifdef USE_5005THREADS
533c011a
NIS
1685 CvOWNER(PL_compcv) = 0;
1686 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1687 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1688#endif /* USE_5005THREADS */
6224f72b 1689
0c4f7ff0 1690 boot_core_PerlIO();
6224f72b 1691 boot_core_UNIVERSAL();
09bef843 1692 boot_core_xsutils();
6224f72b
GS
1693
1694 if (xsinit)
acfe0abc 1695 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1696#ifndef PERL_MICRO
ed79a026 1697#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1698 init_os_extras();
6224f72b 1699#endif
64ca3a65 1700#endif
6224f72b 1701
29209bc5 1702#ifdef USE_SOCKS
1b9c9cf5
DH
1703# ifdef HAS_SOCKS5_INIT
1704 socks5_init(argv[0]);
1705# else
29209bc5 1706 SOCKSinit(argv[0]);
1b9c9cf5 1707# endif
ac27b0f5 1708#endif
29209bc5 1709
6224f72b
GS
1710 init_predump_symbols();
1711 /* init_postdump_symbols not currently designed to be called */
1712 /* more than once (ENV isn't cleared first, for example) */
1713 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1714 if (!PL_do_undump)
6224f72b
GS
1715 init_postdump_symbols(argc,argv,env);
1716
27da23d5
JH
1717 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
1718 * or explicitly in some platforms.
085a54d9 1719 * locale.c:Perl_init_i18nl10n() if the environment
a05d7ebb 1720 * look like the user wants to use UTF-8. */
27da23d5
JH
1721#if defined(SYMBIAN)
1722 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
1723#endif
06e66572
JH
1724 if (PL_unicode) {
1725 /* Requires init_predump_symbols(). */
a05d7ebb 1726 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
06e66572
JH
1727 IO* io;
1728 PerlIO* fp;
1729 SV* sv;
1730
a05d7ebb 1731 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
06e66572 1732 * and the default open disciplines. */
a05d7ebb
JH
1733 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
1734 PL_stdingv && (io = GvIO(PL_stdingv)) &&
1735 (fp = IoIFP(io)))
1736 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1737 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
1738 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
1739 (fp = IoOFP(io)))
1740 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1741 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
1742 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
1743 (fp = IoOFP(io)))
1744 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1745 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
1746 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1747 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
1748 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
1749 if (in) {
1750 if (out)
1751 sv_setpvn(sv, ":utf8\0:utf8", 11);
1752 else
1753 sv_setpvn(sv, ":utf8\0", 6);
1754 }
1755 else if (out)
1756 sv_setpvn(sv, "\0:utf8", 6);
1757 SvSETMAGIC(sv);
1758 }
b310b053
JH
1759 }
1760 }
1761
4ffa73a3
JH
1762 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
1763 if (strEQ(s, "unsafe"))
1764 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
1765 else if (strEQ(s, "safe"))
1766 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
1767 else
1768 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
1769 }
1770
6224f72b
GS
1771 init_lexer();
1772
1773 /* now parse the script */
1774
93189314 1775 SETERRNO(0,SS_NORMAL);
3280af22 1776 PL_error_count = 0;
bf4acbe4
GS
1777#ifdef MACOS_TRADITIONAL
1778 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1779 if (PL_minus_c)
1780 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1781 else {
1782 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1783 MacPerl_MPWFileName(PL_origfilename));
1784 }
1785 }
1786#else
3280af22
NIS
1787 if (yyparse() || PL_error_count) {
1788 if (PL_minus_c)
cea2e8a9 1789 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1790 else {
cea2e8a9 1791 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1792 PL_origfilename);
6224f72b
GS
1793 }
1794 }
bf4acbe4 1795#endif
57843af0 1796 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1797 PL_curstash = PL_defstash;
1798 PL_preprocess = FALSE;
1799 if (PL_e_script) {
1800 SvREFCNT_dec(PL_e_script);
1801 PL_e_script = Nullsv;
6224f72b
GS
1802 }
1803
3280af22 1804 if (PL_do_undump)
6224f72b
GS
1805 my_unexec();
1806
57843af0
GS
1807 if (isWARN_ONCE) {
1808 SAVECOPFILE(PL_curcop);
1809 SAVECOPLINE(PL_curcop);
3280af22 1810 gv_check(PL_defstash);
57843af0 1811 }
6224f72b
GS
1812
1813 LEAVE;
1814 FREETMPS;
1815
1816#ifdef MYMALLOC
1817 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1818 dump_mstats("after compilation:");
1819#endif
1820
1821 ENTER;
3280af22 1822 PL_restartop = 0;
312caa8e 1823 return NULL;
6224f72b
GS
1824}
1825
954c1994
GS
1826/*
1827=for apidoc perl_run
1828
1829Tells a Perl interpreter to run. See L<perlembed>.
1830
1831=cut
1832*/
1833
6224f72b 1834int
0cb96387 1835perl_run(pTHXx)
6224f72b 1836{
6224f72b 1837 I32 oldscope;
14dd3ad8 1838 int ret = 0;
db36c5a1 1839 dJMPENV;
6224f72b 1840
3280af22 1841 oldscope = PL_scopestack_ix;
96e176bf
CL
1842#ifdef VMS
1843 VMSISH_HUSHED = 0;
1844#endif
6224f72b 1845
14dd3ad8 1846 JMPENV_PUSH(ret);
6224f72b
GS
1847 switch (ret) {
1848 case 1:
1849 cxstack_ix = -1; /* start context stack again */
312caa8e 1850 goto redo_body;
14dd3ad8 1851 case 0: /* normal completion */
14dd3ad8
GS
1852 redo_body:
1853 run_body(oldscope);
14dd3ad8
GS
1854 /* FALL THROUGH */
1855 case 2: /* my_exit() */
3280af22 1856 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1857 LEAVE;
1858 FREETMPS;
3280af22 1859 PL_curstash = PL_defstash;
3a1ee7e8 1860 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
1861 PL_endav && !PL_minus_c)
1862 call_list(oldscope, PL_endav);
6224f72b
GS
1863#ifdef MYMALLOC
1864 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1865 dump_mstats("after execution: ");
1866#endif
14dd3ad8
GS
1867 ret = STATUS_NATIVE_EXPORT;
1868 break;
6224f72b 1869 case 3:
312caa8e
CS
1870 if (PL_restartop) {
1871 POPSTACK_TO(PL_mainstack);
1872 goto redo_body;
6224f72b 1873 }
bf49b057 1874 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1875 FREETMPS;
14dd3ad8
GS
1876 ret = 1;
1877 break;
6224f72b
GS
1878 }
1879
14dd3ad8
GS
1880 JMPENV_POP;
1881 return ret;
312caa8e
CS
1882}
1883
14dd3ad8 1884
dd374669 1885STATIC void
14dd3ad8
GS
1886S_run_body(pTHX_ I32 oldscope)
1887{
6224f72b 1888 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1889 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1890
3280af22 1891 if (!PL_restartop) {
6224f72b 1892 DEBUG_x(dump_all());
ecae49c0
NC
1893 if (!DEBUG_q_TEST)
1894 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1895 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1896 PTR2UV(thr)));
6224f72b 1897
3280af22 1898 if (PL_minus_c) {
bf4acbe4 1899#ifdef MACOS_TRADITIONAL
e69a2255
JH
1900 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
1901 (gMacPerl_ErrorFormat ? "# " : ""),
1902 MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1903#else
bf49b057 1904 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1905#endif
6224f72b
GS
1906 my_exit(0);
1907 }
3280af22 1908 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1909 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1910 if (PL_initav)
1911 call_list(oldscope, PL_initav);
6224f72b
GS
1912 }
1913
1914 /* do it */
1915
3280af22 1916 if (PL_restartop) {
533c011a 1917 PL_op = PL_restartop;
3280af22 1918 PL_restartop = 0;
cea2e8a9 1919 CALLRUNOPS(aTHX);
6224f72b 1920 }
3280af22
NIS
1921 else if (PL_main_start) {
1922 CvDEPTH(PL_main_cv) = 1;
533c011a 1923 PL_op = PL_main_start;
cea2e8a9 1924 CALLRUNOPS(aTHX);
6224f72b 1925 }
f6b3007c
JH
1926 my_exit(0);
1927 /* NOTREACHED */
6224f72b
GS
1928}
1929
954c1994 1930/*
ccfc67b7
JH
1931=head1 SV Manipulation Functions
1932
954c1994
GS
1933=for apidoc p||get_sv
1934
1935Returns the SV of the specified Perl scalar. If C<create> is set and the
1936Perl variable does not exist then it will be created. If C<create> is not
1937set and the variable does not exist then NULL is returned.
1938
1939=cut
1940*/
1941
6224f72b 1942SV*
864dbfa3 1943Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1944{
1945 GV *gv;
4d1ff10f 1946#ifdef USE_5005THREADS
6224f72b
GS
1947 if (name[1] == '\0' && !isALPHA(name[0])) {
1948 PADOFFSET tmp = find_threadsv(name);
411caa50 1949 if (tmp != NOT_IN_PAD)
6224f72b 1950 return THREADSV(tmp);
6224f72b 1951 }
4d1ff10f 1952#endif /* USE_5005THREADS */
6224f72b
GS
1953 gv = gv_fetchpv(name, create, SVt_PV);
1954 if (gv)
1955 return GvSV(gv);
1956 return Nullsv;
1957}
1958
954c1994 1959/*
ccfc67b7
JH
1960=head1 Array Manipulation Functions
1961
954c1994
GS
1962=for apidoc p||get_av
1963
1964Returns the AV of the specified Perl array. If C<create> is set and the
1965Perl variable does not exist then it will be created. If C<create> is not
1966set and the variable does not exist then NULL is returned.
1967
1968=cut
1969*/
1970
6224f72b 1971AV*
864dbfa3 1972Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1973{
1974 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1975 if (create)
1976 return GvAVn(gv);
1977 if (gv)
1978 return GvAV(gv);
1979 return Nullav;
1980}
1981
954c1994 1982/*
ccfc67b7
JH
1983=head1 Hash Manipulation Functions
1984
954c1994
GS
1985=for apidoc p||get_hv
1986
1987Returns the HV of the specified Perl hash. If C<create> is set and the
1988Perl variable does not exist then it will be created. If C<create> is not
1989set and the variable does not exist then NULL is returned.
1990
1991=cut
1992*/
1993
6224f72b 1994HV*
864dbfa3 1995Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1996{
a0d0e21e
LW
1997 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1998 if (create)
1999 return GvHVn(gv);
2000 if (gv)
2001 return GvHV(gv);
2002 return Nullhv;
2003}
2004
954c1994 2005/*
ccfc67b7
JH
2006=head1 CV Manipulation Functions
2007
954c1994
GS
2008=for apidoc p||get_cv
2009
2010Returns the CV of the specified Perl subroutine. If C<create> is set and
2011the Perl subroutine does not exist then it will be declared (which has the
2012same effect as saying C<sub name;>). If C<create> is not set and the
2013subroutine does not exist then NULL is returned.
2014
2015=cut
2016*/
2017
a0d0e21e 2018CV*
864dbfa3 2019Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
2020{
2021 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 2022 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
2023 /* XXX this is probably not what they think they're getting.
2024 * It has the same effect as "sub name;", i.e. just a forward
2025 * declaration! */
8ebc5c01 2026 if (create && !GvCVu(gv))
774d564b 2027 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 2028 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 2029 Nullop,
a0d0e21e
LW
2030 Nullop);
2031 if (gv)
8ebc5c01 2032 return GvCVu(gv);
a0d0e21e
LW
2033 return Nullcv;
2034}
2035
79072805
LW
2036/* Be sure to refetch the stack pointer after calling these routines. */
2037
954c1994 2038/*
ccfc67b7
JH
2039
2040=head1 Callback Functions
2041
954c1994
GS
2042=for apidoc p||call_argv
2043
2044Performs a callback to the specified Perl sub. See L<perlcall>.
2045
2046=cut
2047*/
2048
a0d0e21e 2049I32
8f42b153 2050Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 2051
8ac85365
NIS
2052 /* See G_* flags in cop.h */
2053 /* null terminated arg list */
8990e307 2054{
a0d0e21e 2055 dSP;
8990e307 2056
924508f0 2057 PUSHMARK(SP);
a0d0e21e 2058 if (argv) {
8990e307 2059 while (*argv) {
a0d0e21e 2060 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
2061 argv++;
2062 }
a0d0e21e 2063 PUTBACK;
8990e307 2064 }
864dbfa3 2065 return call_pv(sub_name, flags);
8990e307
LW
2066}
2067
954c1994
GS
2068/*
2069=for apidoc p||call_pv
2070
2071Performs a callback to the specified Perl sub. See L<perlcall>.
2072
2073=cut
2074*/
2075
a0d0e21e 2076I32
864dbfa3 2077Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
2078 /* name of the subroutine */
2079 /* See G_* flags in cop.h */
a0d0e21e 2080{
864dbfa3 2081 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
2082}
2083
954c1994
GS
2084/*
2085=for apidoc p||call_method
2086
2087Performs a callback to the specified Perl method. The blessed object must
2088be on the stack. See L<perlcall>.
2089
2090=cut
2091*/
2092
a0d0e21e 2093I32
864dbfa3 2094Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
2095 /* name of the subroutine */
2096 /* See G_* flags in cop.h */
a0d0e21e 2097{
968b3946 2098 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
2099}
2100
2101/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
2102/*
2103=for apidoc p||call_sv
2104
2105Performs a callback to the Perl sub whose name is in the SV. See
2106L<perlcall>.
2107
2108=cut
2109*/
2110
a0d0e21e 2111I32
864dbfa3 2112Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 2113 /* See G_* flags in cop.h */
a0d0e21e 2114{
27da23d5 2115 dVAR; dSP;
a0d0e21e 2116 LOGOP myop; /* fake syntax tree node */
968b3946 2117 UNOP method_op;
aa689395 2118 I32 oldmark;
13689cfe 2119 volatile I32 retval = 0;
a0d0e21e 2120 I32 oldscope;
54310121 2121 bool oldcatch = CATCH_GET;
6224f72b 2122 int ret;
533c011a 2123 OP* oldop = PL_op;
db36c5a1 2124 dJMPENV;
1e422769 2125
a0d0e21e
LW
2126 if (flags & G_DISCARD) {
2127 ENTER;
2128 SAVETMPS;
2129 }
2130
aa689395 2131 Zero(&myop, 1, LOGOP);
54310121 2132 myop.op_next = Nullop;
f51d4af5 2133 if (!(flags & G_NOARGS))
aa689395 2134 myop.op_flags |= OPf_STACKED;
54310121
PP
2135 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2136 (flags & G_ARRAY) ? OPf_WANT_LIST :
2137 OPf_WANT_SCALAR);
462e5cf6 2138 SAVEOP();
533c011a 2139 PL_op = (OP*)&myop;
aa689395 2140
3280af22
NIS
2141 EXTEND(PL_stack_sp, 1);
2142 *++PL_stack_sp = sv;
aa689395 2143 oldmark = TOPMARK;
3280af22 2144 oldscope = PL_scopestack_ix;
a0d0e21e 2145
3280af22 2146 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 2147 /* Handle first BEGIN of -d. */
3280af22 2148 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
2149 /* Try harder, since this may have been a sighandler, thus
2150 * curstash may be meaningless. */
3280af22 2151 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 2152 && !(flags & G_NODEBUG))
533c011a 2153 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 2154
968b3946
GS
2155 if (flags & G_METHOD) {
2156 Zero(&method_op, 1, UNOP);
2157 method_op.op_next = PL_op;
2158 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2159 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 2160 PL_op = (OP*)&method_op;
968b3946
GS
2161 }
2162
312caa8e 2163 if (!(flags & G_EVAL)) {
0cdb2077 2164 CATCH_SET(TRUE);
14dd3ad8 2165 call_body((OP*)&myop, FALSE);
312caa8e 2166 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 2167 CATCH_SET(oldcatch);
312caa8e
CS
2168 }
2169 else {
d78bda3d 2170 myop.op_other = (OP*)&myop;
3280af22 2171 PL_markstack_ptr--;
4633a7c4
LW
2172 /* we're trying to emulate pp_entertry() here */
2173 {
c09156bb 2174 register PERL_CONTEXT *cx;
54310121 2175 I32 gimme = GIMME_V;
ac27b0f5 2176
4633a7c4
LW
2177 ENTER;
2178 SAVETMPS;
ac27b0f5 2179
1d76a5c3 2180 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 2181 PUSHEVAL(cx, 0, 0);
533c011a 2182 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 2183
faef0170 2184 PL_in_eval = EVAL_INEVAL;
4633a7c4 2185 if (flags & G_KEEPERR)
faef0170 2186 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 2187 else
38a03e6e 2188 sv_setpv(ERRSV,"");
4633a7c4 2189 }
3280af22 2190 PL_markstack_ptr++;
a0d0e21e 2191
14dd3ad8 2192 JMPENV_PUSH(ret);
6224f72b
GS
2193 switch (ret) {
2194 case 0:
14dd3ad8
GS
2195 redo_body:
2196 call_body((OP*)&myop, FALSE);
312caa8e
CS
2197 retval = PL_stack_sp - (PL_stack_base + oldmark);
2198 if (!(flags & G_KEEPERR))
2199 sv_setpv(ERRSV,"");
a0d0e21e 2200 break;
6224f72b 2201 case 1:
f86702cc 2202 STATUS_ALL_FAILURE;
a0d0e21e 2203 /* FALL THROUGH */
6224f72b 2204 case 2:
a0d0e21e 2205 /* my_exit() was called */
3280af22 2206 PL_curstash = PL_defstash;
a0d0e21e 2207 FREETMPS;
14dd3ad8 2208 JMPENV_POP;
cc3604b1 2209 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2210 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2211 my_exit_jump();
a0d0e21e 2212 /* NOTREACHED */
6224f72b 2213 case 3:
3280af22 2214 if (PL_restartop) {
533c011a 2215 PL_op = PL_restartop;
3280af22 2216 PL_restartop = 0;
312caa8e 2217 goto redo_body;
a0d0e21e 2218 }
3280af22 2219 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2220 if (flags & G_ARRAY)
2221 retval = 0;
2222 else {
2223 retval = 1;
3280af22 2224 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 2225 }
312caa8e 2226 break;
a0d0e21e 2227 }
a0d0e21e 2228
3280af22 2229 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
2230 SV **newsp;
2231 PMOP *newpm;
2232 I32 gimme;
c09156bb 2233 register PERL_CONTEXT *cx;
a0a2876f
LW
2234 I32 optype;
2235
2236 POPBLOCK(cx,newpm);
2237 POPEVAL(cx);
3280af22 2238 PL_curpm = newpm;
a0a2876f 2239 LEAVE;
a0d0e21e 2240 }
14dd3ad8 2241 JMPENV_POP;
a0d0e21e 2242 }
1e422769 2243
a0d0e21e 2244 if (flags & G_DISCARD) {
3280af22 2245 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2246 retval = 0;
2247 FREETMPS;
2248 LEAVE;
2249 }
533c011a 2250 PL_op = oldop;
a0d0e21e
LW
2251 return retval;
2252}
2253
312caa8e 2254STATIC void
dd374669 2255S_call_body(pTHX_ const OP *myop, bool is_eval)
312caa8e 2256{
312caa8e
CS
2257 if (PL_op == myop) {
2258 if (is_eval)
f807eda9 2259 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 2260 else
f807eda9 2261 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
2262 }
2263 if (PL_op)
cea2e8a9 2264 CALLRUNOPS(aTHX);
312caa8e
CS
2265}
2266
6e72f9df 2267/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 2268
954c1994
GS
2269/*
2270=for apidoc p||eval_sv
2271
2272Tells Perl to C<eval> the string in the SV.
2273
2274=cut
2275*/
2276
a0d0e21e 2277I32
864dbfa3 2278Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 2279
8ac85365 2280 /* See G_* flags in cop.h */
a0d0e21e 2281{
924508f0 2282 dSP;
a0d0e21e 2283 UNOP myop; /* fake syntax tree node */
8fa7f367 2284 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 2285 volatile I32 retval = 0;
4633a7c4 2286 I32 oldscope;
6224f72b 2287 int ret;
533c011a 2288 OP* oldop = PL_op;
db36c5a1 2289 dJMPENV;
84902520 2290
4633a7c4
LW
2291 if (flags & G_DISCARD) {
2292 ENTER;
2293 SAVETMPS;
2294 }
2295
462e5cf6 2296 SAVEOP();
533c011a
NIS
2297 PL_op = (OP*)&myop;
2298 Zero(PL_op, 1, UNOP);
3280af22
NIS
2299 EXTEND(PL_stack_sp, 1);
2300 *++PL_stack_sp = sv;
2301 oldscope = PL_scopestack_ix;
79072805 2302
4633a7c4
LW
2303 if (!(flags & G_NOARGS))
2304 myop.op_flags = OPf_STACKED;
79072805 2305 myop.op_next = Nullop;
6e72f9df 2306 myop.op_type = OP_ENTEREVAL;
54310121
PP
2307 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2308 (flags & G_ARRAY) ? OPf_WANT_LIST :
2309 OPf_WANT_SCALAR);
6e72f9df
PP
2310 if (flags & G_KEEPERR)
2311 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2312
dedbcade
DM
2313 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2314 * before a PUSHEVAL, which corrupts the stack after a croak */
2315 TAINT_PROPER("eval_sv()");
2316
14dd3ad8 2317 JMPENV_PUSH(ret);
6224f72b
GS
2318 switch (ret) {
2319 case 0:
14dd3ad8
GS
2320 redo_body:
2321 call_body((OP*)&myop,TRUE);
312caa8e
CS
2322 retval = PL_stack_sp - (PL_stack_base + oldmark);
2323 if (!(flags & G_KEEPERR))
2324 sv_setpv(ERRSV,"");
4633a7c4 2325 break;
6224f72b 2326 case 1:
f86702cc 2327 STATUS_ALL_FAILURE;
4633a7c4 2328 /* FALL THROUGH */
6224f72b 2329 case 2:
4633a7c4 2330 /* my_exit() was called */
3280af22 2331 PL_curstash = PL_defstash;
4633a7c4 2332 FREETMPS;
14dd3ad8 2333 JMPENV_POP;
cc3604b1 2334 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2335 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2336 my_exit_jump();
4633a7c4 2337 /* NOTREACHED */
6224f72b 2338 case 3:
3280af22 2339 if (PL_restartop) {
533c011a 2340 PL_op = PL_restartop;
3280af22 2341 PL_restartop = 0;
312caa8e 2342 goto redo_body;
4633a7c4 2343 }
3280af22 2344 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2345 if (flags & G_ARRAY)
2346 retval = 0;
2347 else {
2348 retval = 1;
3280af22 2349 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2350 }
312caa8e 2351 break;
4633a7c4
LW
2352 }
2353
14dd3ad8 2354 JMPENV_POP;
4633a7c4 2355 if (flags & G_DISCARD) {
3280af22 2356 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2357 retval = 0;
2358 FREETMPS;
2359 LEAVE;
2360 }
533c011a 2361 PL_op = oldop;
4633a7c4
LW
2362 return retval;
2363}
2364
954c1994
GS
2365/*
2366=for apidoc p||eval_pv
2367
2368Tells Perl to C<eval> the given string and return an SV* result.
2369
2370=cut
2371*/
2372
137443ea 2373SV*
864dbfa3 2374Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2375{
2376 dSP;
2377 SV* sv = newSVpv(p, 0);
2378
864dbfa3 2379 eval_sv(sv, G_SCALAR);
137443ea
PP
2380 SvREFCNT_dec(sv);
2381
2382 SPAGAIN;
2383 sv = POPs;
2384 PUTBACK;
2385
2d8e6c8d
GS
2386 if (croak_on_error && SvTRUE(ERRSV)) {
2387 STRLEN n_a;
cea2e8a9 2388 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2389 }
137443ea
PP
2390
2391 return sv;
2392}
2393
4633a7c4
LW
2394/* Require a module. */
2395
954c1994 2396/*
ccfc67b7
JH
2397=head1 Embedding Functions
2398
954c1994
GS
2399=for apidoc p||require_pv
2400
7d3fb230
BS
2401Tells Perl to C<require> the file named by the string argument. It is
2402analogous to the Perl code C<eval "require '$file'">. It's even
2307c6d0 2403implemented that way; consider using load_module instead.
954c1994 2404
7d3fb230 2405=cut */
954c1994 2406
4633a7c4 2407void
864dbfa3 2408Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2409{
d3acc0f7
JP
2410 SV* sv;
2411 dSP;
e788e7d3 2412 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2413 PUTBACK;
2414 sv = sv_newmortal();
4633a7c4
LW
2415 sv_setpv(sv, "require '");
2416 sv_catpv(sv, pv);
2417 sv_catpv(sv, "'");
864dbfa3 2418 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2419 SPAGAIN;
2420 POPSTACK;
79072805
LW
2421}
2422
79072805 2423void
e1ec3a88 2424Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
79072805
LW
2425{
2426 register GV *gv;
2427
155aba94 2428 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2429 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2430}
2431
76e3520e 2432STATIC void
e1ec3a88 2433S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
4633a7c4 2434{
ab821d7f 2435 /* This message really ought to be max 23 lines.
75c72d73 2436 * Removed -h because the user already knows that option. Others? */
fb73857a 2437
27da23d5 2438 static const char * const usage_msg[] = {
fb73857a 2439"-0[octal] specify record separator (\\0, if no argument)",
f4ca673a 2440"-A[name] activate all/given assertions",
fb73857a 2441"-a autosplit mode with -n or -p (splits $_ into @F)",
fb3560ee 2442"-C[number/list] enables the listed Unicode features",
1950ee41 2443"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2444"-d[:debugger] run program under debugger",
2445"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
90490ea3 2446"-e program one line of program (several -e's allowed, omit programfile)",
f71cb6df 2447#ifdef USE_SITECUSTOMIZE
20ef40cf 2448"-f don't do $sitelib/sitecustomize.pl at startup",
f71cb6df 2449#endif
aac3bd0d
GS
2450"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2451"-i[extension] edit <> files in place (makes backup if extension supplied)",
2452"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2453"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2454"-[mM][-]module execute `use/no module...' before executing program",
2455"-n assume 'while (<>) { ... }' loop around program",
2456"-p assume loop like -n but print line also, like sed",
2457"-P run program through C preprocessor before compilation",
2458"-s enable rudimentary parsing for switches after programfile",
2459"-S look for programfile using PATH environment variable",
9cbc33e8 2460"-t enable tainting warnings",
90490ea3 2461"-T enable tainting checks",
aac3bd0d 2462"-u dump core after parsing program",
fb73857a 2463"-U allow unsafe operations",
aac3bd0d
GS
2464"-v print version, subversion (includes VERY IMPORTANT perl info)",
2465"-V[:variable] print configuration summary (or a single Config.pm variable)",
2466"-w enable many useful warnings (RECOMMENDED)",
3c0facb2 2467"-W enable all warnings",
fb73857a 2468"-x[directory] strip off text before #!perl line and perhaps cd to directory",
90490ea3 2469"-X disable all warnings",
fb73857a
PP
2470"\n",
2471NULL
2472};
27da23d5 2473 const char * const *p = usage_msg;
fb73857a 2474
b0e47665
GS
2475 PerlIO_printf(PerlIO_stdout(),
2476 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2477 name);
fb73857a 2478 while (*p)
b0e47665 2479 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2480}
2481
b4ab917c
DM
2482/* convert a string of -D options (or digits) into an int.
2483 * sets *s to point to the char after the options */
2484
2485#ifdef DEBUGGING
2486int
e1ec3a88 2487Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
b4ab917c 2488{
27da23d5 2489 static const char * const usage_msgd[] = {
e6e64d9b
JC
2490 " Debugging flag values: (see also -d)",
2491 " p Tokenizing and parsing (with v, displays parse stack)",
3679267a 2492 " s Stack snapshots (with v, displays all stacks)",
e6e64d9b
JC
2493 " l Context (loop) stack processing",
2494 " t Trace execution",
2495 " o Method and overloading resolution",
2496 " c String/numeric conversions",
2497 " P Print profiling info, preprocessor command for -P, source file input state",
2498 " m Memory allocation",
2499 " f Format processing",
2500 " r Regular expression parsing and execution",
2501 " x Syntax tree dump",
3679267a 2502 " u Tainting checks",
e6e64d9b
JC
2503 " H Hash dump -- usurps values()",
2504 " X Scratchpad allocation",
2505 " D Cleaning up",
2506 " S Thread synchronization",
2507 " T Tokenising",
2508 " R Include reference counts of dumped variables (eg when using -Ds)",
2509 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2510 " v Verbose: use in conjunction with other flags",
2511 " C Copy On Write",
2512 " A Consistency checks on internal structures",
3679267a 2513 " q quiet - currently only suppresses the 'EXECUTING' message",
e6e64d9b
JC
2514 NULL
2515 };
b4ab917c
DM
2516 int i = 0;
2517 if (isALPHA(**s)) {
2518 /* if adding extra options, remember to update DEBUG_MASK */
bfed75c6 2519 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
b4ab917c
DM
2520
2521 for (; isALNUM(**s); (*s)++) {
e1ec3a88 2522 const char *d = strchr(debopts,**s);
b4ab917c
DM
2523 if (d)
2524 i |= 1 << (d - debopts);
2525 else if (ckWARN_d(WARN_DEBUGGING))
e6e64d9b
JC
2526 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2527 "invalid option -D%c, use -D'' to see choices\n", **s);
b4ab917c
DM
2528 }
2529 }
e6e64d9b 2530 else if (isDIGIT(**s)) {
b4ab917c
DM
2531 i = atoi(*s);
2532 for (; isALNUM(**s); (*s)++) ;
2533 }
ddcf8bc1 2534 else if (givehelp) {
aadb217d 2535 char **p = (char **)usage_msgd;
e6e64d9b
JC
2536 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2537 }
b4ab917c
DM
2538# ifdef EBCDIC
2539 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2540 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2541 "-Dp not implemented on this platform\n");
2542# endif
2543 return i;
2544}
2545#endif
2546
79072805
LW
2547/* This routine handles any switches that can be given during run */
2548
2549char *
864dbfa3 2550Perl_moreswitches(pTHX_ char *s)
79072805 2551{
27da23d5 2552 dVAR;
ba210ebe 2553 STRLEN numlen;
84c133a0 2554 UV rschar;
79072805
LW
2555
2556 switch (*s) {
2557 case '0':
a863c7d1 2558 {
f2095865
JH
2559 I32 flags = 0;
2560
2561 SvREFCNT_dec(PL_rs);
2562 if (s[1] == 'x' && s[2]) {
2563 char *e;
2564 U8 *tmps;
2565
2566 for (s += 2, e = s; *e; e++);
2567 numlen = e - s;
2568 flags = PERL_SCAN_SILENT_ILLDIGIT;
2569 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2570 if (s + numlen < e) {
2571 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2572 numlen = 0;
2573 s--;
2574 }
2575 PL_rs = newSVpvn("", 0);
c5661c80 2576 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
f2095865
JH
2577 tmps = (U8*)SvPVX(PL_rs);
2578 uvchr_to_utf8(tmps, rschar);
2579 SvCUR_set(PL_rs, UNISKIP(rschar));
2580 SvUTF8_on(PL_rs);
2581 }
2582 else {
2583 numlen = 4;
2584 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2585 if (rschar & ~((U8)~0))
2586 PL_rs = &PL_sv_undef;
2587 else if (!rschar && numlen >= 2)
2588 PL_rs = newSVpvn("", 0);
2589 else {
2590 char ch = (char)rschar;
2591 PL_rs = newSVpvn(&ch, 1);
2592 }
2593 }
800633c3 2594 sv_setsv(get_sv("/", TRUE), PL_rs);
f2095865 2595 return s + numlen;
a863c7d1 2596 }
46487f74 2597 case 'C':
a05d7ebb 2598 s++;
dd374669 2599 PL_unicode = parse_unicode_opts( (const char **)&s );
46487f74 2600 return s;
2304df62 2601 case 'F':
3280af22 2602 PL_minus_F = TRUE;
ebce5377
RGS
2603 PL_splitstr = ++s;
2604 while (*s && !isSPACE(*s)) ++s;
2605 *s = '\0';
2606 PL_splitstr = savepv(PL_splitstr);
2304df62 2607 return s;
79072805 2608 case 'a':
3280af22 2609 PL_minus_a = TRUE;
79072805
LW
2610 s++;
2611 return s;
2612 case 'c':
3280af22 2613 PL_minus_c = TRUE;
79072805
LW
2614 s++;
2615 return s;
2616 case 'd':
bbce6d69 2617 forbid_setid("-d");
4633a7c4 2618 s++;
2cbb2ee1
RGS
2619
2620 /* -dt indicates to the debugger that threads will be used */
2621 if (*s == 't' && !isALNUM(s[1])) {
2622 ++s;
2623 my_setenv("PERL5DB_THREADED", "1");
2624 }
2625
70c94a19
RR
2626 /* The following permits -d:Mod to accepts arguments following an =
2627 in the fashion that -MSome::Mod does. */
2628 if (*s == ':' || *s == '=') {
06b5626a 2629 const char *start;
70c94a19
RR
2630 SV *sv;
2631 sv = newSVpv("use Devel::", 0);
2632 start = ++s;
2633 /* We now allow -d:Module=Foo,Bar */
2634 while(isALNUM(*s) || *s==':') ++s;
2635 if (*s != '=')
2636 sv_catpv(sv, start);
2637 else {
2638 sv_catpvn(sv, start, s-start);
2639 sv_catpv(sv, " split(/,/,q{");
2640 sv_catpv(sv, ++s);
3d27e215 2641 sv_catpv(sv, "})");
70c94a19 2642 }
4633a7c4 2643 s += strlen(s);
70c94a19 2644 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2645 }
ed094faf 2646 if (!PL_perldb) {
3280af22 2647 PL_perldb = PERLDB_ALL;
a0d0e21e 2648 init_debugger();
ed094faf 2649 }
79072805
LW
2650 return s;
2651 case 'D':
0453d815 2652 {
79072805 2653#ifdef DEBUGGING
bbce6d69 2654 forbid_setid("-D");
b4ab917c 2655 s++;
dd374669 2656 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
12a43e32 2657#else /* !DEBUGGING */
0453d815 2658 if (ckWARN_d(WARN_DEBUGGING))
9014280d 2659 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
e6e64d9b 2660 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
a0d0e21e 2661 for (s++; isALNUM(*s); s++) ;
79072805
LW
2662#endif
2663 /*SUPPRESS 530*/
2664 return s;
0453d815 2665 }
4633a7c4 2666 case 'h':
ac27b0f5 2667 usage(PL_origargv[0]);
7ca617d0 2668 my_exit(0);
79072805 2669 case 'i':
3280af22
NIS
2670 if (PL_inplace)
2671 Safefree(PL_inplace);
c030f24b
GH
2672#if defined(__CYGWIN__) /* do backup extension automagically */
2673 if (*(s+1) == '\0') {
2674 PL_inplace = savepv(".bak");
2675 return s+1;
2676 }
2677#endif /* __CYGWIN__ */
3280af22 2678 PL_inplace = savepv(s+1);
79072805 2679 /*SUPPRESS 530*/
3280af22 2680 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2681 if (*s) {
fb73857a 2682 *s++ = '\0';
7b8d334a
GS
2683 if (*s == '-') /* Additional switches on #! line. */
2684 s++;
2685 }
fb73857a 2686 return s;
4e49a025 2687 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2688 forbid_setid("-I");
fb73857a
PP
2689 ++s;
2690 while (*s && isSPACE(*s))
2691 ++s;
2692 if (*s) {
774d564b 2693 char *e, *p;
0df16ed7
GS
2694 p = s;
2695 /* ignore trailing spaces (possibly followed by other switches) */
2696 do {
2697 for (e = p; *e && !isSPACE(*e); e++) ;
2698 p = e;
2699 while (isSPACE(*p))
2700 p++;
2701 } while (*p && *p != '-');
2702 e = savepvn(s, e-s);
88fe16b2 2703 incpush(e, TRUE, TRUE, FALSE, FALSE);
0df16ed7
GS
2704 Safefree(e);
2705 s = p;
2706 if (*s == '-')
2707 s++;
79072805
LW
2708 }
2709 else
a67e862a 2710 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2711 return s;
79072805 2712 case 'l':
3280af22 2713 PL_minus_l = TRUE;
79072805 2714 s++;
7889fe52
NIS
2715 if (PL_ors_sv) {
2716 SvREFCNT_dec(PL_ors_sv);
2717 PL_ors_sv = Nullsv;
2718 }
79072805 2719 if (isDIGIT(*s)) {
53305cf1 2720 I32 flags = 0;
7889fe52 2721 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2722 numlen = 3 + (*s == '0');
2723 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2724 s += numlen;
2725 }
2726 else {
8bfdd7d9 2727 if (RsPARA(PL_rs)) {
7889fe52
NIS
2728 PL_ors_sv = newSVpvn("\n\n",2);
2729 }
2730 else {
8bfdd7d9 2731 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2732 }
79072805
LW
2733 }
2734 return s;
06492da6
SF
2735 case 'A':
2736 forbid_setid("-A");
930366bd
RGS
2737 if (!PL_preambleav)
2738 PL_preambleav = newAV();
06492da6 2739 if (*++s) {
3d27e215
LM
2740 SV *sv = newSVpv("use assertions::activate split(/,/,q", 0);
2741 sv_catpvn(sv, "\0", 1); /* Use NUL as q//-delimiter. */
06492da6 2742 sv_catpv(sv,s);
3d27e215 2743 sv_catpvn(sv, "\0)", 2);
06492da6 2744 s+=strlen(s);
06492da6
SF
2745 av_push(PL_preambleav, sv);
2746 }
2747 else
930366bd 2748 av_push(PL_preambleav, newSVpvn("use assertions::activate",24));
06492da6 2749 return s;
1a30305b 2750 case 'M':
bbce6d69 2751 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2752 /* FALL THROUGH */
2753 case 'm':
bbce6d69 2754 forbid_setid("-m"); /* XXX ? */
1a30305b 2755 if (*++s) {
a5f75d66 2756 char *start;
11343788 2757 SV *sv;
e1ec3a88 2758 const char *use = "use ";
a5f75d66
AD
2759 /* -M-foo == 'no foo' */
2760 if (*s == '-') { use = "no "; ++s; }
11343788 2761 sv = newSVpv(use,0);
a5f75d66 2762 start = s;
1a30305b 2763 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2764 while(isALNUM(*s) || *s==':') ++s;
2765 if (*s != '=') {
11343788 2766 sv_catpv(sv, start);
c07a80fd
PP
2767 if (*(start-1) == 'm') {
2768 if (*s != '\0')
cea2e8a9 2769 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2770 sv_catpv( sv, " ()");
c07a80fd
PP
2771 }
2772 } else {
6df41af2 2773 if (s == start)
be98fb35
GS
2774 Perl_croak(aTHX_ "Module name required with -%c option",
2775 s[-1]);
11343788 2776 sv_catpvn(sv, start, s-start);
3d27e215
LM
2777 sv_catpv(sv, " split(/,/,q");
2778 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
11343788 2779 sv_catpv(sv, ++s);
3d27e215 2780 sv_catpvn(sv, "\0)", 2);
c07a80fd 2781 }
1a30305b 2782 s += strlen(s);
5c831c24 2783 if (!PL_preambleav)
3280af22
NIS
2784 PL_preambleav = newAV();
2785 av_push(PL_preambleav, sv);
1a30305b
PP
2786 }
2787 else
9e81e6a1 2788 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
1a30305b 2789 return s;
79072805 2790 case 'n':
3280af22 2791 PL_minus_n = TRUE;
79072805
LW
2792 s++;
2793 return s;
2794 case 'p':
3280af22 2795 PL_minus_p = TRUE;
79072805
LW
2796 s++;
2797 return s;
2798 case 's':
bbce6d69 2799 forbid_setid("-s");
3280af22 2800 PL_doswitches = TRUE;
79072805
LW
2801 s++;
2802 return s;
6537fe72
MS
2803 case 't':
2804 if (!PL_tainting)
22f7c9c9 2805 TOO_LATE_FOR('t');
6537fe72
MS
2806 s++;
2807 return s;
463ee0b2 2808 case 'T':
3280af22 2809 if (!PL_tainting)
22f7c9c9 2810 TOO_LATE_FOR('T');
463ee0b2
LW
2811 s++;
2812 return s;
79072805 2813 case 'u':
bf4acbe4
GS
2814#ifdef MACOS_TRADITIONAL
2815 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2816#endif
3280af22 2817 PL_do_undump = TRUE;
79072805
LW
2818 s++;
2819 return s;
2820 case 'U':
3280af22 2821 PL_unsafe = TRUE;
79072805
LW
2822 s++;
2823 return s;
2824 case 'v':
d7aa5382
JP
2825 if (!sv_derived_from(PL_patchlevel, "version"))
2826 (void *)upg_version(PL_patchlevel);
8e9464f1 2827#if !defined(DGUX)
b0e47665 2828 PerlIO_printf(PerlIO_stdout(),
014ead4b 2829 Perl_form(aTHX_ "\nThis is perl, v%"SVf" built for %s",
d7aa5382
JP
2830 vstringify(PL_patchlevel),
2831 ARCHNAME));
8e9464f1
JH
2832#else /* DGUX */
2833/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2834 PerlIO_printf(PerlIO_stdout(),
014ead4b 2835 Perl_form(aTHX_ "\nThis is perl, v%"SVf"\n",
d7aa5382 2836 vstringify(PL_patchlevel)));
8e9464f1
JH
2837 PerlIO_printf(PerlIO_stdout(),
2838 Perl_form(aTHX_ " built under %s at %s %s\n",
2839 OSNAME, __DATE__, __TIME__));
2840 PerlIO_printf(PerlIO_stdout(),
2841 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2842 OSVERS));
8e9464f1
JH
2843#endif /* !DGUX */
2844
fb73857a
PP
2845#if defined(LOCAL_PATCH_COUNT)
2846 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2847 PerlIO_printf(PerlIO_stdout(),
2848 "\n(with %d registered patch%s, "
2849 "see perl -V for more detail)",
2850 (int)LOCAL_PATCH_COUNT,
2851 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2852#endif
1a30305b 2853
b0e47665 2854 PerlIO_printf(PerlIO_stdout(),
359b00fe 2855 "\n\nCopyright 1987-2005, Larry Wall\n");
eae9c151
JH
2856#ifdef MACOS_TRADITIONAL
2857 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2858 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 2859 "maintained by Chris Nandor\n");
eae9c151 2860#endif
79072805 2861#ifdef MSDOS
b0e47665
GS
2862 PerlIO_printf(PerlIO_stdout(),
2863 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2864#endif
2865#ifdef DJGPP
b0e47665
GS
2866 PerlIO_printf(PerlIO_stdout(),
2867 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2868 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2869#endif
79072805 2870#ifdef OS2
b0e47665
GS
2871 PerlIO_printf(PerlIO_stdout(),
2872 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 2873 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2874#endif
79072805 2875#ifdef atarist
b0e47665
GS
2876 PerlIO_printf(PerlIO_stdout(),
2877 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2878#endif
a3f9223b 2879#ifdef __BEOS__
b0e47665
GS
2880 PerlIO_printf(PerlIO_stdout(),
2881 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2882#endif
1d84e8df 2883#ifdef MPE
b0e47665 2884 PerlIO_printf(PerlIO_stdout(),
e583a879 2885 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
1d84e8df 2886#endif
9d116dd7 2887#ifdef OEMVS
b0e47665
GS
2888 PerlIO_printf(PerlIO_stdout(),
2889 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2890#endif
495c5fdc 2891#ifdef __VOS__
b0e47665 2892 PerlIO_printf(PerlIO_stdout(),
94efb9fb 2893 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 2894#endif
092bebab 2895#ifdef __OPEN_VM
b0e47665
GS
2896 PerlIO_printf(PerlIO_stdout(),
2897 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2898#endif
a1a0e61e 2899#ifdef POSIX_BC
b0e47665
GS
2900 PerlIO_printf(PerlIO_stdout(),
2901 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2902#endif
61ae2fbf 2903#ifdef __MINT__
b0e47665
GS
2904 PerlIO_printf(PerlIO_stdout(),
2905 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2906#endif
f83d2536 2907#ifdef EPOC
b0e47665 2908 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2909 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 2910#endif
e1caacb4 2911#ifdef UNDER_CE
b475b3e6
JH
2912 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
2913 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
e1caacb4
JH
2914 wce_hitreturn();
2915#endif
27da23d5
JH
2916#ifdef SYMBIAN
2917 PerlIO_printf(PerlIO_stdout(),
2918 "Symbian port by Nokia, 2004-2005\n");
2919#endif
baed7233
DL
2920#ifdef BINARY_BUILD_NOTICE
2921 BINARY_BUILD_NOTICE;
2922#endif
b0e47665
GS
2923 PerlIO_printf(PerlIO_stdout(),
2924 "\n\
79072805 2925Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2926GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2927Complete documentation for Perl, including FAQ lists, should be found on\n\
2928this system using `man perl' or `perldoc perl'. If you have access to the\n\
c9e30dd8 2929Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
7ca617d0 2930 my_exit(0);
79072805 2931 case 'w':
599cee73 2932 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2933 PL_dowarn |= G_WARN_ON;
599cee73
PM
2934 s++;
2935 return s;
2936 case 'W':
ac27b0f5 2937 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS
2938 if (!specialWARN(PL_compiling.cop_warnings))
2939 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2940 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2941 s++;
2942 return s;
2943 case 'X':
ac27b0f5 2944 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS
2945 if (!specialWARN(PL_compiling.cop_warnings))
2946 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2947 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2948 s++;
2949 return s;
a0d0e21e 2950 case '*':
79072805
LW
2951 case ' ':
2952 if (s[1] == '-') /* Additional switches on #! line. */
2953 return s+2;
2954 break;
a0d0e21e 2955 case '-':
79072805 2956 case 0:
51882d45 2957#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2958 case '\r':
2959#endif
79072805
LW
2960 case '\n':
2961 case '\t':
2962 break;
aa689395
PP
2963#ifdef ALTERNATE_SHEBANG
2964 case 'S': /* OS/2 needs -S on "extproc" line. */
2965 break;
2966#endif
a0d0e21e 2967 case 'P':
3280af22 2968 if (PL_preprocess)
a0d0e21e
LW
2969 return s+1;
2970 /* FALL THROUGH */
79072805 2971 default:
cea2e8a9 2972 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2973 }
2974 return Nullch;
2975}
2976
2977/* compliments of Tom Christiansen */
2978
2979/* unexec() can be found in the Gnu emacs distribution */
ee580363 2980/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2981
2982void
864dbfa3 2983Perl_my_unexec(pTHX)
79072805
LW
2984{
2985#ifdef UNEXEC
46fc3d4c
PP
2986 SV* prog;
2987 SV* file;
ee580363 2988 int status = 1;
79072805
LW
2989 extern int etext;
2990
ee580363 2991 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2992 sv_catpv(prog, "/perl");
6b88bc9c 2993 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2994 sv_catpv(file, ".perldump");
79072805 2995
ee580363
GS
2996 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2997 /* unexec prints msg to stderr in case of failure */
6ad3d225 2998 PerlProc_exit(status);
79072805 2999#else
a5f75d66
AD
3000# ifdef VMS
3001# include <lib$routines.h>
3002 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 3003# else
79072805 3004 ABORT(); /* for use with undump */
aa689395 3005# endif
a5f75d66 3006#endif
79072805
LW
3007}
3008
cb68f92d
GS
3009/* initialize curinterp */
3010STATIC void
cea2e8a9 3011S_init_interp(pTHX)
cb68f92d
GS
3012{
3013
acfe0abc
GS
3014#ifdef MULTIPLICITY
3015# define PERLVAR(var,type)
3016# define PERLVARA(var,n,type)
3017# if defined(PERL_IMPLICIT_CONTEXT)
3018# if defined(USE_5005THREADS)
3019# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
27da23d5 3020# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
3021# else /* !USE_5005THREADS */
3022# define PERLVARI(var,type,init) aTHX->var = init;
3023# define PERLVARIC(var,type,init) aTHX->var = init;
3024# endif /* USE_5005THREADS */
3967c732 3025# else
acfe0abc
GS
3026# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3027# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 3028# endif
acfe0abc
GS
3029# include "intrpvar.h"
3030# ifndef USE_5005THREADS
3031# include "thrdvar.h"
3032# endif
3033# undef PERLVAR
3034# undef PERLVARA
3035# undef PERLVARI
3036# undef PERLVARIC
3037#else
3038# define PERLVAR(var,type)
3039# define PERLVARA(var,n,type)
3040# define PERLVARI(var,type,init) PL_##var = init;
3041# define PERLVARIC(var,type,init) PL_##var = init;
3042# include "intrpvar.h"
3043# ifndef USE_5005THREADS
3044# include "thrdvar.h"
3045# endif
3046# undef PERLVAR
3047# undef PERLVARA
3048# undef PERLVARI
3049# undef PERLVARIC
cb68f92d
GS
3050#endif
3051
cb68f92d
GS
3052}
3053
76e3520e 3054STATIC void
cea2e8a9 3055S_init_main_stash(pTHX)
79072805 3056{
463ee0b2 3057 GV *gv;
6e72f9df 3058
3280af22 3059 PL_curstash = PL_defstash = newHV();
79cb57f6 3060 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
3061 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3062 SvREFCNT_dec(GvHV(gv));
3280af22 3063 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 3064 SvREADONLY_on(gv);
ff5bdd37 3065 HvNAME(PL_defstash) = savepvn("main", 4);
3280af22
NIS
3066 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3067 GvMULTI_on(PL_incgv);
3068 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3069 GvMULTI_on(PL_hintgv);
3070 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3071 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3072 GvMULTI_on(PL_errgv);
3073 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3074 GvMULTI_on(PL_replgv);
cea2e8a9 3075 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
3076 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3077 sv_setpvn(ERRSV, "", 0);
3280af22 3078 PL_curstash = PL_defstash;
11faa288 3079 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 3080 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 3081 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 3082 /* We must init $/ before switches are processed. */
864dbfa3 3083 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
3084}
3085
ae3f3efd 3086/* PSz 18 Nov 03 fdscript now global but do not change prototype */
76e3520e 3087STATIC void
dd374669 3088S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
79072805 3089{
ae3f3efd 3090#ifndef IAMSUID
e1ec3a88
AL
3091 const char *quote;
3092 const char *code;
3093 const char *cpp_discard_flag;
3094 const char *perl;
ae3f3efd 3095#endif
27da23d5 3096 dVAR;
1b24ed4b 3097
ae3f3efd
PS
3098 PL_fdscript = -1;
3099 PL_suidscript = -1;
79072805 3100
3280af22 3101 if (PL_e_script) {
ff5bdd37 3102 PL_origfilename = savepvn("-e", 2);
96436eeb 3103 }
6c4ab083
GS
3104 else {
3105 /* if find_script() returns, it returns a malloc()-ed value */
dd374669 3106 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
3107
3108 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
e1ec3a88 3109 const char *s = scriptname + 8;
ae3f3efd 3110 PL_fdscript = atoi(s);
6c4ab083
GS
3111 while (isDIGIT(*s))
3112 s++;
3113 if (*s) {
ae3f3efd
PS
3114 /* PSz 18 Feb 04
3115 * Tell apart "normal" usage of fdscript, e.g.
3116 * with bash on FreeBSD:
3117 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3118 * from usage in suidperl.
3119 * Does any "normal" usage leave garbage after the number???
3120 * Is it a mistake to use a similar /dev/fd/ construct for
3121 * suidperl?
3122 */
3123 PL_suidscript = 1;
3124 /* PSz 20 Feb 04
3125 * Be supersafe and do some sanity-checks.
3126 * Still, can we be sure we got the right thing?
3127 */
3128 if (*s != '/') {
3129 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3130 }
3131 if (! *(s+1)) {
3132 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3133 }
6c4ab083 3134 scriptname = savepv(s + 1);
3280af22 3135 Safefree(PL_origfilename);
dd374669 3136 PL_origfilename = (char *)scriptname;
6c4ab083
GS
3137 }
3138 }
3139 }
3140
05ec9bb3 3141 CopFILE_free(PL_curcop);
57843af0 3142 CopFILE_set(PL_curcop, PL_origfilename);
770526c1 3143 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
dd374669 3144 scriptname = (char *)"";
ae3f3efd
PS
3145 if (PL_fdscript >= 0) {
3146 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS
3147# if defined(HAS_FCNTL) && defined(F_SETFD)
3148 if (PL_rsfp)
3149 /* ensure close-on-exec */
3150 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3151# endif
96436eeb 3152 }
ae3f3efd
PS
3153#ifdef IAMSUID
3154 else {
86207487
NC
3155 Perl_croak(aTHX_ "sperl needs fd script\n"
3156 "You should not call sperl directly; do you need to "
3157 "change a #! line\nfrom sperl to perl?\n");
3158
ae3f3efd
PS
3159/* PSz 11 Nov 03
3160 * Do not open (or do other fancy stuff) while setuid.
3161 * Perl does the open, and hands script to suidperl on a fd;
3162 * suidperl only does some checks, sets up UIDs and re-execs
3163 * perl with that fd as it has always done.
3164 */
3165 }
3166 if (PL_suidscript != 1) {
3167 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3168 }
3169#else /* IAMSUID */
3280af22 3170 else if (PL_preprocess) {
dd374669 3171 const char *cpp_cfg = CPPSTDIN;
79cb57f6 3172 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
3173 SV *cmd = NEWSV(0,0);
3174
ae58f265
JH
3175 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3176 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
46fc3d4c 3177 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 3178 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 3179 sv_catpv(cpp, cpp_cfg);
79072805 3180
1b24ed4b
MS
3181# ifndef VMS
3182 sv_catpvn(sv, "-I", 2);
3183 sv_catpv(sv,PRIVLIB_EXP);
3184# endif
46fc3d4c 3185
14953ddc
MB
3186 DEBUG_P(PerlIO_printf(Perl_debug_log,
3187 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3188 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS
3189
3190# if defined(MSDOS) || defined(WIN32) || defined(VMS)
3191 quote = "\"";
3192# else
3193 quote = "'";
3194# endif
3195
3196# ifdef VMS
3197 cpp_discard_flag = "";
3198# else
3199 cpp_discard_flag = "-C";
3200# endif
3201
3202# ifdef OS2
3203 perl = os2_execname(aTHX);
3204# else
3205 perl = PL_origargv[0];
3206# endif
3207
3208
3209 /* This strips off Perl comments which might interfere with
62375a60
NIS
3210 the C pre-processor, including #!. #line directives are
3211 deliberately stripped to avoid confusion with Perl's version
1b24ed4b
MS
3212 of #line. FWP played some golf with it so it will fit
3213 into VMS's 255 character buffer.
3214 */
3215 if( PL_doextract )
3216 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3217 else
3218 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3219
3220 Perl_sv_setpvf(aTHX_ cmd, "\
3221%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
62375a60 3222 perl, quote, code, quote, scriptname, cpp,
1b24ed4b
MS
3223 cpp_discard_flag, sv, CPPMINUS);
3224
3280af22 3225 PL_doextract = FALSE;
0a6c758d 3226
62375a60
NIS
3227 DEBUG_P(PerlIO_printf(Perl_debug_log,
3228 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS
3229 SvPVX(cmd)));
3230
dd374669 3231 PL_rsfp = PerlProc_popen(SvPVX(cmd), (char *)"r");
46fc3d4c
PP
3232 SvREFCNT_dec(cmd);
3233 SvREFCNT_dec(cpp);
79072805
LW
3234 }
3235 else if (!*scriptname) {
bbce6d69 3236 forbid_setid("program input from stdin");
3280af22 3237 PL_rsfp = PerlIO_stdin();
79072805 3238 }
96436eeb 3239 else {
3280af22 3240 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS
3241# if defined(HAS_FCNTL) && defined(F_SETFD)
3242 if (PL_rsfp)
3243 /* ensure close-on-exec */
3244 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3245# endif
96436eeb 3246 }
ae3f3efd 3247#endif /* IAMSUID */
3280af22 3248 if (!PL_rsfp) {
447218f8 3249 /* PSz 16 Sep 03 Keep neat error message */
fa3aa65a
JC
3250 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3251 CopFILE(PL_curcop), Strerror(errno));
13281fa4 3252 }
79072805 3253}
8d063cd8 3254
7b89560d
JH
3255/* Mention
3256 * I_SYSSTATVFS HAS_FSTATVFS
3257 * I_SYSMOUNT
c890dc6c 3258 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
3259 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3260 * here so that metaconfig picks them up. */
3261
104d25b7 3262#ifdef IAMSUID
864dbfa3 3263STATIC int
e688b231 3264S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 3265{
ae3f3efd
PS
3266/* PSz 27 Feb 04
3267 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3268 * but is needed also on machines without setreuid.
3269 * Seems safe enough to run as root.
3270 */
0545a864
JH
3271 int check_okay = 0; /* able to do all the required sys/libcalls */
3272 int on_nosuid = 0; /* the fd is on a nosuid fs */
ae3f3efd
PS
3273 /* PSz 12 Nov 03
3274 * Need to check noexec also: nosuid might not be set, the average
3275 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3276 */
3277 int on_noexec = 0; /* the fd is on a noexec fs */
3278
104d25b7 3279/*
ad27e871 3280 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 3281 * fstatvfs() is UNIX98.
0545a864 3282 * fstatfs() is 4.3 BSD.
ad27e871 3283 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
3284 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3285 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
3286 */
3287
6439433f
JH
3288#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3289
3290# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3291 defined(HAS_FSTATVFS)
3292# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 3293 struct statvfs stfs;
6439433f 3294
104d25b7
JH
3295 check_okay = fstatvfs(fd, &stfs) == 0;
3296 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
ae3f3efd
PS
3297#ifdef ST_NOEXEC
3298 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3299 on platforms where it is present. */
3300 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3301#endif
6439433f 3302# endif /* fstatvfs */
ac27b0f5 3303
6439433f
JH
3304# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3305 defined(PERL_MOUNT_NOSUID) && \
ae3f3efd 3306 defined(PERL_MOUNT_NOEXEC) && \
6439433f
JH
3307 defined(HAS_FSTATFS) && \
3308 defined(HAS_STRUCT_STATFS) && \
3309 defined(HAS_STRUCT_STATFS_F_FLAGS)
3310# define FD_ON_NOSUID_CHECK_OKAY
e688b231 3311 struct statfs stfs;
6439433f 3312
104d25b7 3313 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 3314 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
ae3f3efd 3315 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
6439433f
JH
3316# endif /* fstatfs */
3317
3318# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3319 defined(PERL_MOUNT_NOSUID) && \
ae3f3efd 3320 defined(PERL_MOUNT_NOEXEC) && \
6439433f
JH
3321 defined(HAS_FSTAT) && \
3322 defined(HAS_USTAT) && \
3323 defined(HAS_GETMNT) && \
3324 defined(HAS_STRUCT_FS_DATA) && \
3325 defined(NOSTAT_ONE)
3326# define FD_ON_NOSUID_CHECK_OKAY
c623ac67 3327 Stat_t fdst;
6439433f 3328
0545a864 3329 if (fstat(fd, &fdst) == 0) {
6439433f
JH
3330 struct ustat us;
3331 if (ustat(fdst.st_dev, &us) == 0) {
3332 struct fs_data fsd;
3333 /* NOSTAT_ONE here because we're not examining fields which
3334 * vary between that case and STAT_ONE. */
ad27e871 3335 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
3336 size_t cmplen = sizeof(us.f_fname);
3337 if (sizeof(fsd.fd_req.path) < cmplen)
3338 cmplen = sizeof(fsd.fd_req.path);
3339 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3340 fdst.st_dev == fsd.fd_req.dev) {
3341 check_okay = 1;
3342 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
ae3f3efd 3343 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
6439433f
JH
3344 }
3345 }
3346 }
3347 }
0545a864 3348 }
6439433f
JH
3349# endif /* fstat+ustat+getmnt */
3350
3351# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3352 defined(HAS_GETMNTENT) && \
3353 defined(HAS_HASMNTOPT) && \
ae3f3efd
PS
3354 defined(MNTOPT_NOSUID) && \
3355 defined(MNTOPT_NOEXEC)
6439433f
JH
3356# define FD_ON_NOSUID_CHECK_OKAY
3357 FILE *mtab = fopen("/etc/mtab", "r");
3358 struct mntent *entry;
c623ac67 3359 Stat_t stb, fsb;
104d25b7
JH
3360
3361 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
3362 while (entry = getmntent(mtab)) {
3363 if (stat(entry->mnt_dir, &fsb) == 0
3364 && fsb.st_dev == stb.st_dev)
3365 {
3366 /* found the filesystem */
3367 check_okay = 1;
3368 if (hasmntopt(entry, MNTOPT_NOSUID))
3369 on_nosuid = 1;
ae3f3efd
PS
3370 if (hasmntopt(entry, MNTOPT_NOEXEC))
3371 on_noexec = 1;
6439433f
JH
3372 break;
3373 } /* A single fs may well fail its stat(). */
3374 }
104d25b7
JH
3375 }
3376 if (mtab)
6439433f
JH
3377 fclose(mtab);
3378# endif /* getmntent+hasmntopt */
0545a864 3379
ac27b0f5 3380 if (!check_okay)
ae3f3efd
PS
3381 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3382 if (on_nosuid)
3383 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3384 if (on_noexec)
3385 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3386 return ((!check_okay) || on_nosuid || on_noexec);
104d25b7
JH
3387}
3388#endif /* IAMSUID */
3389
76e3520e 3390STATIC void
e1ec3a88 3391S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
79072805 3392{
27da23d5 3393 dVAR;
155aba94 3394#ifdef IAMSUID
ae3f3efd
PS
3395 /* int which; */
3396#endif /* IAMSUID */
96436eeb 3397
13281fa4
LW
3398 /* do we need to emulate setuid on scripts? */
3399
3400 /* This code is for those BSD systems that have setuid #! scripts disabled
3401 * in the kernel because of a security problem. Merely defining DOSUID
3402 * in perl will not fix that problem, but if you have disabled setuid
3403 * scripts in the kernel, this will attempt to emulate setuid and setgid
3404 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
3405 * root version must be called suidperl or sperlN.NNN. If regular perl
3406 * discovers that it has opened a setuid script, it calls suidperl with
3407 * the same argv that it had. If suidperl finds that the script it has
3408 * just opened is NOT setuid root, it sets the effective uid back to the
3409 * uid. We don't just make perl setuid root because that loses the
3410 * effective uid we had before invoking perl, if it was different from the
3411 * uid.
ae3f3efd
PS
3412 * PSz 27 Feb 04
3413 * Description/comments above do not match current workings:
3414 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3415 * suidperl called with script open and name changed to /dev/fd/N/X;
3416 * suidperl croaks if script is not setuid;
3417 * making perl setuid would be a huge security risk (and yes, that
3418 * would lose any euid we might have had).
13281fa4
LW
3419 *
3420 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3421 * be defined in suidperl only. suidperl must be setuid root. The
3422 * Configure script will set this up for you if you want it.
3423 */
a687059c 3424
13281fa4 3425#ifdef DOSUID
6e72f9df 3426 char *s, *s2;
a0d0e21e 3427
b28d0864 3428 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 3429 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
ae3f3efd 3430 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 3431 I32 len;
2d8e6c8d 3432 STRLEN n_a;
13281fa4 3433
a687059c 3434#ifdef IAMSUID
ae3f3efd
PS
3435 if (PL_fdscript < 0 || PL_suidscript != 1)
3436 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3437 /* PSz 11 Nov 03
3438 * Since the script is opened by perl, not suidperl, some of these
3439 * checks are superfluous. Leaving them in probably does not lower
3440 * security(?!).
3441 */
3442 /* PSz 27 Feb 04
3443 * Do checks even for systems with no HAS_SETREUID.
3444 * We used to swap, then re-swap UIDs with
3445#ifdef HAS_SETREUID
3446 if (setreuid(PL_euid,PL_uid) < 0
3447 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3448 Perl_croak(aTHX_ "Can't swap uid and euid");
3449#endif
3450#ifdef HAS_SETREUID
3451 if (setreuid(PL_uid,PL_euid) < 0
3452 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3453 Perl_croak(aTHX_ "Can't reswap uid and euid");
3454#endif
3455 */
3456
a687059c
LW
3457 /* On this access check to make sure the directories are readable,
3458 * there is actually a small window that the user could use to make
3459 * filename point to an accessible directory. So there is a faint
3460 * chance that someone could execute a setuid script down in a
3461 * non-accessible directory. I don't know what to do about that.
3462 * But I don't think it's too important. The manual lies when
3463 * it says access() is useful in setuid programs.
ae3f3efd
PS
3464 *
3465 * So, access() is pretty useless... but not harmful... do anyway.
a687059c 3466 */
e57400b1 3467 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
ae3f3efd 3468 Perl_croak(aTHX_ "Can't access() script\n");
e57400b1 3469 }
ae3f3efd 3470
a687059c
LW
3471 /* If we can swap euid and uid, then we can determine access rights
3472 * with a simple stat of the file, and then compare device and
3473 * inode to make sure we did stat() on the same file we opened.
3474 * Then we just have to make sure he or she can execute it.
ae3f3efd
PS
3475 *
3476 * PSz 24 Feb 04
3477 * As the script is opened by perl, not suidperl, we do not need to
3478 * care much about access rights.
3479 *
3480 * The 'script changed' check is needed, or we can get lied to
3481 * about $0 with e.g.
3482 * suidperl /dev/fd/4//bin/x 4<setuidscript
3483 * Without HAS_SETREUID, is it safe to stat() as root?
3484 *
3485 * Are there any operating systems that pass /dev/fd/xxx for setuid
3486 * scripts, as suggested/described in perlsec(1)? Surely they do not
3487 * pass the script name as we do, so the "script changed" test would
3488 * fail for them... but we never get here with
3489 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3490 *
3491 * This is one place where we must "lie" about return status: not
3492 * say if the stat() failed. We are doing this as root, and could
3493 * be tricked into reporting existence or not of files that the
3494 * "plain" user cannot even see.
a687059c
LW
3495 */
3496 {
c623ac67 3497 Stat_t tmpstatbuf;
ae3f3efd
PS
3498 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3499 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
b28d0864 3500 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
ae3f3efd 3501 Perl_croak(aTHX_ "Setuid script changed\n");
a687059c 3502 }
ae3f3efd 3503
a687059c 3504 }
ae3f3efd
PS
3505 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3506 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3507
3508 /* PSz 27 Feb 04
3509 * We used to do this check as the "plain" user (after swapping
3510 * UIDs). But the check for nosuid and noexec filesystem is needed,
3511 * and should be done even without HAS_SETREUID. (Maybe those
3512 * operating systems do not have such mount options anyway...)
3513 * Seems safe enough to do as root.
3514 */
3515#if !defined(NO_NOSUID_CHECK)
3516 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3517 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3518 }
3519#endif
a687059c
LW
3520#endif /* IAMSUID */
3521
e57400b1 3522 if (!S_ISREG(PL_statbuf.st_mode)) {
ae3f3efd 3523 Perl_croak(aTHX_ "Setuid script not plain file\n");
e57400b1 3524 }
b28d0864 3525 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3526 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3527 PL_doswitches = FALSE; /* -s is insecure in suid */
ae3f3efd 3528 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
57843af0 3529 CopLINE_inc(PL_curcop);
6b88bc9c 3530 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3531 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3532 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3533 s = SvPV(PL_linestr,n_a)+2;
ae3f3efd
PS
3534 /* PSz 27 Feb 04 */
3535 /* Sanity check on line length */
3536 if (strlen(s) < 1 || strlen(s) > 4000)
3537 Perl_croak(aTHX_ "Very long #! line");
3538 /* Allow more than a single space after #! */
3539 while (isSPACE(*s)) s++;
3540 /* Sanity check on buffer end */
3541 while ((*s) && !isSPACE(*s)) s++;
2d8e6c8d 3542 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
3792a11b
NC
3543 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3544 || s2[-1] == '-')); s2--) ;
ae3f3efd
PS
3545 /* Sanity check on buffer start */
3546 if ( (s2-4 < SvPV(PL_linestr,n_a)+2 || strnNE(s2-4,"perl",4)) &&
3547 (s-9 < SvPV(PL_linestr,n_a)+2 || strnNE(s-9,"perl",4)) )
cea2e8a9 3548 Perl_croak(aTHX_ "Not a perl script");
a687059c 3549 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3550 /*
3551 * #! arg must be what we saw above. They can invoke it by
3552 * mentioning suidperl explicitly, but they may not add any strange
3553 * arguments beyond what #! says if they do invoke suidperl that way.
3554 */
ae3f3efd
PS
3555 /*
3556 * The way validarg was set up, we rely on the kernel to start
3557 * scripts with argv[1] set to contain all #! line switches (the
3558 * whole line).
3559 */
3560 /*
3561 * Check that we got all the arguments listed in the #! line (not