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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
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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
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85#ifdef NETWARE
86#include "nwutil.h"
87char *nw_get_sitelib(const char *pl);
88#endif
89
df5cef82 90/* XXX If this causes problems, set i_unistd=undef in the hint file. */
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91#ifdef I_UNISTD
92#include <unistd.h>
93#endif
a0d0e21e 94
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95#ifdef __BEOS__
96# define HZ 1000000
97#endif
98
99#ifndef HZ
100# ifdef CLK_TCK
101# define HZ CLK_TCK
102# else
103# define HZ 60
104# endif
105#endif
106
7114a2d2 107#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
20ce7b12 108char *getenv (char *); /* Usually in <stdlib.h> */
54310121
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
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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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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
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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
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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
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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;
27da23d5 339 (void) SvUPGRADE(error, SVt_PV);
0510663f 340 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
27da23d5
JH
341 }
342 else
343 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
344 }
345 }
346#else
347# ifdef HAS_GETPAGESIZE
348 PL_mmap_page_size = getpagesize();
349# else
350# if defined(I_SYS_PARAM) && defined(PAGESIZE)
351 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
352# endif
353# endif
354#endif
355 if (PL_mmap_page_size <= 0)
356 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
357 (IV) PL_mmap_page_size);
358 }
359#endif /* HAS_MMAP */
360
361#if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
362 PL_timesbase.tms_utime = 0;
363 PL_timesbase.tms_stime = 0;
364 PL_timesbase.tms_cutime = 0;
365 PL_timesbase.tms_cstime = 0;
366#endif
367
8990e307 368 ENTER;
79072805
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369}
370
954c1994 371/*
62375a60
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372=for apidoc nothreadhook
373
374Stub that provides thread hook for perl_destruct when there are
375no threads.
376
377=cut
378*/
379
380int
4e9e3734 381Perl_nothreadhook(pTHX)
62375a60
NIS
382{
383 return 0;
384}
385
386/*
954c1994
GS
387=for apidoc perl_destruct
388
389Shuts down a Perl interpreter. See L<perlembed>.
390
391=cut
392*/
393
31d77e54 394int
0cb96387 395perl_destruct(pTHXx)
79072805 396{
27da23d5 397 dVAR;
7c474504 398 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 399 HV *hv;
8990e307 400
7766f137
GS
401 /* wait for all pseudo-forked children to finish */
402 PERL_WAIT_FOR_CHILDREN;
403
3280af22 404 destruct_level = PL_perl_destruct_level;
4633a7c4
LW
405#ifdef DEBUGGING
406 {
b7787f18 407 const char *s;
155aba94 408 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
e1ec3a88 409 const int i = atoi(s);
5f05dabc
PP
410 if (destruct_level < i)
411 destruct_level = i;
412 }
4633a7c4
LW
413 }
414#endif
415
27da23d5 416 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB
417 dJMPENV;
418 int x = 0;
419
420 JMPENV_PUSH(x);
421 if (PL_endav && !PL_minus_c)
422 call_list(PL_scopestack_ix, PL_endav);
423 JMPENV_POP;
26f423df 424 }
f3faeb53 425 LEAVE;
a0d0e21e
LW
426 FREETMPS;
427
e00b64d4 428 /* Need to flush since END blocks can produce output */
f13a2bc0 429 my_fflush_all();
e00b64d4 430
62375a60
NIS
431 if (CALL_FPTR(PL_threadhook)(aTHX)) {
432 /* Threads hook has vetoed further cleanup */
b47cad08 433 return STATUS_NATIVE_EXPORT;
62375a60
NIS
434 }
435
ff0cee69
PP
436 /* We must account for everything. */
437
438 /* Destroy the main CV and syntax tree */
3280af22 439 if (PL_main_root) {
4e380990
DM
440 /* ensure comppad/curpad to refer to main's pad */
441 if (CvPADLIST(PL_main_cv)) {
442 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
443 }
3280af22
NIS
444 op_free(PL_main_root);
445 PL_main_root = Nullop;
a0d0e21e 446 }
3280af22
NIS
447 PL_curcop = &PL_compiling;
448 PL_main_start = Nullop;
449 SvREFCNT_dec(PL_main_cv);
450 PL_main_cv = Nullcv;
24d3c518 451 PL_dirty = TRUE;
ff0cee69 452
13621cfb
NIS
453 /* Tell PerlIO we are about to tear things apart in case
454 we have layers which are using resources that should
455 be cleaned up now.
456 */
457
458 PerlIO_destruct(aTHX);
459
3280af22 460 if (PL_sv_objcount) {
a0d0e21e
LW
461 /*
462 * Try to destruct global references. We do this first so that the
463 * destructors and destructees still exist. Some sv's might remain.
464 * Non-referenced objects are on their own.
465 */
a0d0e21e 466 sv_clean_objs();
bf9cdc68 467 PL_sv_objcount = 0;
8990e307
LW
468 }
469
5cd24f17 470 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
471 SvREFCNT_dec(PL_warnhook);
472 PL_warnhook = Nullsv;
473 SvREFCNT_dec(PL_diehook);
474 PL_diehook = Nullsv;
5cd24f17 475
4b556e6c 476 /* call exit list functions */
3280af22 477 while (PL_exitlistlen-- > 0)
acfe0abc 478 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 479
3280af22 480 Safefree(PL_exitlist);
4b556e6c 481
1c4916e5
CB
482 PL_exitlist = NULL;
483 PL_exitlistlen = 0;
484
a0d0e21e 485 if (destruct_level == 0){
8990e307 486
a0d0e21e 487 DEBUG_P(debprofdump());
ac27b0f5 488
56a2bab7
NIS
489#if defined(PERLIO_LAYERS)
490 /* No more IO - including error messages ! */
491 PerlIO_cleanup(aTHX);
492#endif
493
a0d0e21e 494 /* The exit() function will do everything that needs doing. */
b47cad08 495 return STATUS_NATIVE_EXPORT;
a0d0e21e 496 }
5dd60ef7 497
551a8b83 498 /* jettison our possibly duplicated environment */
4b647fb0
DM
499 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
500 * so we certainly shouldn't free it here
501 */
2f42fcb0 502#ifndef PERL_MICRO
4b647fb0 503#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
50acdf95 504 if (environ != PL_origenviron && !PL_use_safe_putenv
4efc5df6
GS
505#ifdef USE_ITHREADS
506 /* only main thread can free environ[0] contents */
507 && PL_curinterp == aTHX
508#endif
509 )
510 {
551a8b83
JH
511 I32 i;
512
513 for (i = 0; environ[i]; i++)
4b420006 514 safesysfree(environ[i]);
0631ea03 515
4b420006
JH
516 /* Must use safesysfree() when working with environ. */
517 safesysfree(environ);
551a8b83
JH
518
519 environ = PL_origenviron;
520 }
521#endif
2f42fcb0 522#endif /* !PERL_MICRO */
551a8b83 523
804ffa60
DM
524 /* reset so print() ends up where we expect */
525 setdefout(Nullgv);
526
5f8cb046
DM
527#ifdef USE_ITHREADS
528 /* the syntax tree is shared between clones
529 * so op_free(PL_main_root) only ReREFCNT_dec's
530 * REGEXPs in the parent interpreter
531 * we need to manually ReREFCNT_dec for the clones
532 */
533 {
534 I32 i = AvFILLp(PL_regex_padav) + 1;
535 SV **ary = AvARRAY(PL_regex_padav);
536
537 while (i) {
35061a7e 538 SV *resv = ary[--i];
35061a7e
DM
539
540 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 541 /* this is PL_reg_curpm, already freed
35061a7e
DM
542 * flag is set in regexec.c:S_regtry
543 */
544 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 545 }
1cc8b4c5
AB
546 else if(SvREPADTMP(resv)) {
547 SvREPADTMP_off(resv);
548 }
a560f29b
NC
549 else if(SvIOKp(resv)) {
550 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
5f8cb046
DM
551 ReREFCNT_dec(re);
552 }
553 }
554 }
555 SvREFCNT_dec(PL_regex_padav);
556 PL_regex_padav = Nullav;
557 PL_regex_pad = NULL;
558#endif
559
081fc587
AB
560 SvREFCNT_dec((SV*) PL_stashcache);
561 PL_stashcache = NULL;
562
5f05dabc
PP
563 /* loosen bonds of global variables */
564
3280af22
NIS
565 if(PL_rsfp) {
566 (void)PerlIO_close(PL_rsfp);
567 PL_rsfp = Nullfp;
8ebc5c01
PP
568 }
569
570 /* Filters for program text */
3280af22
NIS
571 SvREFCNT_dec(PL_rsfp_filters);
572 PL_rsfp_filters = Nullav;
8ebc5c01
PP
573
574 /* switches */
3280af22
NIS
575 PL_preprocess = FALSE;
576 PL_minus_n = FALSE;
577 PL_minus_p = FALSE;
578 PL_minus_l = FALSE;
579 PL_minus_a = FALSE;
580 PL_minus_F = FALSE;
581 PL_doswitches = FALSE;
599cee73 582 PL_dowarn = G_WARN_OFF;
3280af22
NIS
583 PL_doextract = FALSE;
584 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
585 PL_unsafe = FALSE;
586
587 Safefree(PL_inplace);
588 PL_inplace = Nullch;
a7cb1f99 589 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
590
591 if (PL_e_script) {
592 SvREFCNT_dec(PL_e_script);
593 PL_e_script = Nullsv;
8ebc5c01
PP
594 }
595
bf9cdc68
RG
596 PL_perldb = 0;
597
8ebc5c01
PP
598 /* magical thingies */
599
7889fe52
NIS
600 SvREFCNT_dec(PL_ofs_sv); /* $, */
601 PL_ofs_sv = Nullsv;
5f05dabc 602
7889fe52
NIS
603 SvREFCNT_dec(PL_ors_sv); /* $\ */
604 PL_ors_sv = Nullsv;
8ebc5c01 605
3280af22
NIS
606 SvREFCNT_dec(PL_rs); /* $/ */
607 PL_rs = Nullsv;
dc92893f 608
d33b2eba
GS
609 PL_multiline = 0; /* $* */
610 Safefree(PL_osname); /* $^O */
611 PL_osname = Nullch;
5f05dabc 612
3280af22
NIS
613 SvREFCNT_dec(PL_statname);
614 PL_statname = Nullsv;
615 PL_statgv = Nullgv;
5f05dabc 616
8ebc5c01
PP
617 /* defgv, aka *_ should be taken care of elsewhere */
618
8ebc5c01 619 /* clean up after study() */
3280af22
NIS
620 SvREFCNT_dec(PL_lastscream);
621 PL_lastscream = Nullsv;
622 Safefree(PL_screamfirst);
623 PL_screamfirst = 0;
624 Safefree(PL_screamnext);
625 PL_screamnext = 0;
8ebc5c01 626
7d5ea4e7
GS
627 /* float buffer */
628 Safefree(PL_efloatbuf);
629 PL_efloatbuf = Nullch;
630 PL_efloatsize = 0;
631
8ebc5c01 632 /* startup and shutdown function lists */
3280af22 633 SvREFCNT_dec(PL_beginav);
5a837c8f 634 SvREFCNT_dec(PL_beginav_save);
3280af22 635 SvREFCNT_dec(PL_endav);
7d30b5c4 636 SvREFCNT_dec(PL_checkav);
ece599bd 637 SvREFCNT_dec(PL_checkav_save);
3280af22
NIS
638 SvREFCNT_dec(PL_initav);
639 PL_beginav = Nullav;
5a837c8f 640 PL_beginav_save = Nullav;
3280af22 641 PL_endav = Nullav;
7d30b5c4 642 PL_checkav = Nullav;
ece599bd 643 PL_checkav_save = Nullav;
3280af22 644 PL_initav = Nullav;
5618dfe8 645
8ebc5c01 646 /* shortcuts just get cleared */
3280af22 647 PL_envgv = Nullgv;
3280af22
NIS
648 PL_incgv = Nullgv;
649 PL_hintgv = Nullgv;
650 PL_errgv = Nullgv;
651 PL_argvgv = Nullgv;
652 PL_argvoutgv = Nullgv;
653 PL_stdingv = Nullgv;
bf49b057 654 PL_stderrgv = Nullgv;
3280af22
NIS
655 PL_last_in_gv = Nullgv;
656 PL_replgv = Nullgv;
bf9cdc68
RG
657 PL_DBgv = Nullgv;
658 PL_DBline = Nullgv;
659 PL_DBsub = Nullgv;
660 PL_DBsingle = Nullsv;
661 PL_DBtrace = Nullsv;
662 PL_DBsignal = Nullsv;
663 PL_DBassertion = Nullsv;
664 PL_DBcv = Nullcv;
665 PL_dbargs = Nullav;
5c831c24 666 PL_debstash = Nullhv;
8ebc5c01 667
7a1c5554
GS
668 SvREFCNT_dec(PL_argvout_stack);
669 PL_argvout_stack = Nullav;
8ebc5c01 670
5c831c24
GS
671 SvREFCNT_dec(PL_modglobal);
672 PL_modglobal = Nullhv;
673 SvREFCNT_dec(PL_preambleav);
674 PL_preambleav = Nullav;
675 SvREFCNT_dec(PL_subname);
676 PL_subname = Nullsv;
677 SvREFCNT_dec(PL_linestr);
678 PL_linestr = Nullsv;
679 SvREFCNT_dec(PL_pidstatus);
680 PL_pidstatus = Nullhv;
681 SvREFCNT_dec(PL_toptarget);
682 PL_toptarget = Nullsv;
683 SvREFCNT_dec(PL_bodytarget);
684 PL_bodytarget = Nullsv;
685 PL_formtarget = Nullsv;
686
d33b2eba 687 /* free locale stuff */
b9582b6a 688#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
689 Safefree(PL_collation_name);
690 PL_collation_name = Nullch;
b9582b6a 691#endif
d33b2eba 692
b9582b6a 693#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
694 Safefree(PL_numeric_name);
695 PL_numeric_name = Nullch;
a453c169 696 SvREFCNT_dec(PL_numeric_radix_sv);
bf9cdc68 697 PL_numeric_radix_sv = Nullsv;
b9582b6a 698#endif
d33b2eba 699
5c831c24
GS
700 /* clear utf8 character classes */
701 SvREFCNT_dec(PL_utf8_alnum);
702 SvREFCNT_dec(PL_utf8_alnumc);
703 SvREFCNT_dec(PL_utf8_ascii);
704 SvREFCNT_dec(PL_utf8_alpha);
705 SvREFCNT_dec(PL_utf8_space);
706 SvREFCNT_dec(PL_utf8_cntrl);
707 SvREFCNT_dec(PL_utf8_graph);
708 SvREFCNT_dec(PL_utf8_digit);
709 SvREFCNT_dec(PL_utf8_upper);
710 SvREFCNT_dec(PL_utf8_lower);
711 SvREFCNT_dec(PL_utf8_print);
712 SvREFCNT_dec(PL_utf8_punct);
713 SvREFCNT_dec(PL_utf8_xdigit);
714 SvREFCNT_dec(PL_utf8_mark);
715 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 716 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 717 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 718 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH
719 SvREFCNT_dec(PL_utf8_idstart);
720 SvREFCNT_dec(PL_utf8_idcont);
5c831c24
GS
721 PL_utf8_alnum = Nullsv;
722 PL_utf8_alnumc = Nullsv;
723 PL_utf8_ascii = Nullsv;
724 PL_utf8_alpha = Nullsv;
725 PL_utf8_space = Nullsv;
726 PL_utf8_cntrl = Nullsv;
727 PL_utf8_graph = Nullsv;
728 PL_utf8_digit = Nullsv;
729 PL_utf8_upper = Nullsv;
730 PL_utf8_lower = Nullsv;
731 PL_utf8_print = Nullsv;
732 PL_utf8_punct = Nullsv;
733 PL_utf8_xdigit = Nullsv;
734 PL_utf8_mark = Nullsv;
735 PL_utf8_toupper = Nullsv;
736 PL_utf8_totitle = Nullsv;
737 PL_utf8_tolower = Nullsv;
b4e400f9 738 PL_utf8_tofold = Nullsv;
82686b01
JH
739 PL_utf8_idstart = Nullsv;
740 PL_utf8_idcont = Nullsv;
5c831c24 741
971a9dd3
GS
742 if (!specialWARN(PL_compiling.cop_warnings))
743 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 744 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
745 if (!specialCopIO(PL_compiling.cop_io))
746 SvREFCNT_dec(PL_compiling.cop_io);
747 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS
748 CopFILE_free(&PL_compiling);
749 CopSTASH_free(&PL_compiling);
5c831c24 750
a0d0e21e 751 /* Prepare to destruct main symbol table. */
5f05dabc 752
3280af22
NIS
753 hv = PL_defstash;
754 PL_defstash = 0;
a0d0e21e 755 SvREFCNT_dec(hv);
5c831c24
GS
756 SvREFCNT_dec(PL_curstname);
757 PL_curstname = Nullsv;
a0d0e21e 758
5a844595
GS
759 /* clear queued errors */
760 SvREFCNT_dec(PL_errors);
761 PL_errors = Nullsv;
762
a0d0e21e 763 FREETMPS;
0453d815 764 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 765 if (PL_scopestack_ix != 0)
9014280d 766 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 767 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
768 (long)PL_scopestack_ix);
769 if (PL_savestack_ix != 0)
9014280d 770 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 771 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
772 (long)PL_savestack_ix);
773 if (PL_tmps_floor != -1)
9014280d 774 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 775 (long)PL_tmps_floor + 1);
a0d0e21e 776 if (cxstack_ix != -1)
9014280d 777 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 778 (long)cxstack_ix + 1);
a0d0e21e 779 }
8990e307
LW
780
781 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 782 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 783 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
784
785 /* the 2 is for PL_fdpid and PL_strtab */
786 while (PL_sv_count > 2 && sv_clean_all())
787 ;
788
d33b2eba
GS
789 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
790 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
791 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
792 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 793
d4777f27
GS
794 AvREAL_off(PL_fdpid); /* no surviving entries */
795 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
796 PL_fdpid = Nullav;
797
6c644e78
GS
798#ifdef HAVE_INTERP_INTERN
799 sys_intern_clear();
800#endif
801
6e72f9df
PP
802 /* Destruct the global string table. */
803 {
804 /* Yell and reset the HeVAL() slots that are still holding refcounts,
805 * so that sv_free() won't fail on them.
806 */
807 I32 riter;
808 I32 max;
809 HE *hent;
810 HE **array;
811
812 riter = 0;
3280af22
NIS
813 max = HvMAX(PL_strtab);
814 array = HvARRAY(PL_strtab);
6e72f9df
PP
815 hent = array[0];
816 for (;;) {
0453d815 817 if (hent && ckWARN_d(WARN_INTERNAL)) {
9014280d 818 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 819 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
820 HeVAL(hent) - Nullsv, HeKEY(hent));
821 HeVAL(hent) = Nullsv;
822 hent = HeNEXT(hent);
823 }
824 if (!hent) {
825 if (++riter > max)
826 break;
827 hent = array[riter];
828 }
829 }
830 }
3280af22 831 SvREFCNT_dec(PL_strtab);
6e72f9df 832
e652bb2f 833#ifdef USE_ITHREADS
c21d1a0f 834 /* free the pointer tables used for cloning */
a0739874 835 ptr_table_free(PL_ptr_table);
bf9cdc68 836 PL_ptr_table = (PTR_TBL_t*)NULL;
53186e96 837#endif
a0739874 838
d33b2eba
GS
839 /* free special SVs */
840
841 SvREFCNT(&PL_sv_yes) = 0;
842 sv_clear(&PL_sv_yes);
843 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 844 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
845
846 SvREFCNT(&PL_sv_no) = 0;
847 sv_clear(&PL_sv_no);
848 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 849 SvFLAGS(&PL_sv_no) = 0;
01724ea0 850
9f375a43
DM
851 {
852 int i;
853 for (i=0; i<=2; i++) {
854 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
855 sv_clear(PERL_DEBUG_PAD(i));
856 SvANY(PERL_DEBUG_PAD(i)) = NULL;
857 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
858 }
859 }
860
0453d815 861 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 862 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 863
eba0f806
DM
864#ifdef DEBUG_LEAKING_SCALARS
865 if (PL_sv_count != 0) {
866 SV* sva;
867 SV* sv;
868 register SV* svend;
869
870 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
871 svend = &sva[SvREFCNT(sva)];
872 for (sv = sva + 1; sv < svend; ++sv) {
873 if (SvTYPE(sv) != SVTYPEMASK) {
a548cda8 874 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
61b61456 875 " flags=0x%"UVxf
fd0854ff
DM
876 " refcnt=%"UVuf pTHX__FORMAT "\n"
877 "\tallocated at %s:%d %s %s%s\n",
878 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
879 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
880 sv->sv_debug_line,
881 sv->sv_debug_inpad ? "for" : "by",
882 sv->sv_debug_optype ?
883 PL_op_name[sv->sv_debug_optype]: "(none)",
884 sv->sv_debug_cloned ? " (cloned)" : ""
885 );
eba0f806
DM
886 }
887 }
888 }
889 }
890#endif
bf9cdc68 891 PL_sv_count = 0;
eba0f806
DM
892
893
56a2bab7 894#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
895 /* No more IO - including error messages ! */
896 PerlIO_cleanup(aTHX);
897#endif
898
9f4bd222
NIS
899 /* sv_undef needs to stay immortal until after PerlIO_cleanup
900 as currently layers use it rather than Nullsv as a marker
901 for no arg - and will try and SvREFCNT_dec it.
902 */
903 SvREFCNT(&PL_sv_undef) = 0;
904 SvREADONLY_off(&PL_sv_undef);
905
3280af22 906 Safefree(PL_origfilename);
bf9cdc68 907 PL_origfilename = Nullch;
3280af22 908 Safefree(PL_reg_start_tmp);
bf9cdc68
RG
909 PL_reg_start_tmp = (char**)NULL;
910 PL_reg_start_tmpl = 0;
5c5e4c24
IZ
911 if (PL_reg_curpm)
912 Safefree(PL_reg_curpm);
82ba1be6 913 Safefree(PL_reg_poscache);
dd28f7bb 914 free_tied_hv_pool();
3280af22 915 Safefree(PL_op_mask);
cf36064f 916 Safefree(PL_psig_ptr);
bf9cdc68 917 PL_psig_ptr = (SV**)NULL;
cf36064f 918 Safefree(PL_psig_name);
bf9cdc68 919 PL_psig_name = (SV**)NULL;
2c2666fc 920 Safefree(PL_bitcount);
bf9cdc68 921 PL_bitcount = Nullch;
ce08f86c 922 Safefree(PL_psig_pend);
bf9cdc68
RG
923 PL_psig_pend = (int*)NULL;
924 PL_formfeed = Nullsv;
925 Safefree(PL_ofmt);
926 PL_ofmt = Nullch;
6e72f9df 927 nuke_stacks();
bf9cdc68
RG
928 PL_tainting = FALSE;
929 PL_taint_warn = FALSE;
3280af22 930 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
bf9cdc68 931 PL_debug = 0;
ac27b0f5 932
a0d0e21e 933 DEBUG_P(debprofdump());
d33b2eba 934
e5dd39fc 935#ifdef USE_REENTRANT_API
10bc17b6 936 Perl_reentrant_free(aTHX);
e5dd39fc
AB
937#endif
938
612f20c3
GS
939 sv_free_arenas();
940
fc36a67e
PP
941 /* As the absolutely last thing, free the non-arena SV for mess() */
942
3280af22 943 if (PL_mess_sv) {
f350b448
NC
944 /* we know that type == SVt_PVMG */
945
9c63abab 946 /* it could have accumulated taint magic */
f350b448
NC
947 MAGIC* mg;
948 MAGIC* moremagic;
949 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
950 moremagic = mg->mg_moremagic;
951 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
952 && mg->mg_len >= 0)
953 Safefree(mg->mg_ptr);
954 Safefree(mg);
9c63abab 955 }
f350b448 956
fc36a67e 957 /* we know that type >= SVt_PV */
8bd4d4c5 958 SvPV_free(PL_mess_sv);
3280af22
NIS
959 Safefree(SvANY(PL_mess_sv));
960 Safefree(PL_mess_sv);
961 PL_mess_sv = Nullsv;
fc36a67e 962 }
31d77e54 963 return STATUS_NATIVE_EXPORT;
79072805
LW
964}
965
954c1994
GS
966/*
967=for apidoc perl_free
968
969Releases a Perl interpreter. See L<perlembed>.
970
971=cut
972*/
973
79072805 974void
0cb96387 975perl_free(pTHXx)
79072805 976{
acfe0abc 977#if defined(WIN32) || defined(NETWARE)
ce3e5b80 978# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
979# ifdef NETWARE
980 void *host = nw_internal_host;
981# else
982 void *host = w32_internal_host;
983# endif
ce3e5b80 984 PerlMem_free(aTHXx);
acfe0abc 985# ifdef NETWARE
011f1a1a 986 nw_delete_internal_host(host);
acfe0abc
GS
987# else
988 win32_delete_internal_host(host);
989# endif
1c0ca838
GS
990# else
991 PerlMem_free(aTHXx);
992# endif
acfe0abc
GS
993#else
994 PerlMem_free(aTHXx);
76e3520e 995#endif
79072805
LW
996}
997
aebd1ac7
GA
998#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
999/* provide destructors to clean up the thread key when libperl is unloaded */
1000#ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1001
110d3f98 1002#if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
aebd1ac7
GA
1003#pragma fini "perl_fini"
1004#endif
1005
0dbb1585
AL
1006static void
1007#if defined(__GNUC__)
1008__attribute__((destructor))
aebd1ac7 1009#endif
de009b76 1010perl_fini(void)
aebd1ac7 1011{
27da23d5 1012 dVAR;
aebd1ac7
GA
1013 if (PL_curinterp)
1014 FREE_THREAD_KEY;
1015}
1016
1017#endif /* WIN32 */
1018#endif /* THREADS */
1019
4b556e6c 1020void
864dbfa3 1021Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 1022{
3280af22
NIS
1023 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1024 PL_exitlist[PL_exitlistlen].fn = fn;
1025 PL_exitlist[PL_exitlistlen].ptr = ptr;
1026 ++PL_exitlistlen;
4b556e6c
JD
1027}
1028
56cf6df8
RGS
1029#ifdef HAS_PROCSELFEXE
1030/* This is a function so that we don't hold on to MAXPATHLEN
1031 bytes of stack longer than necessary
1032 */
1033STATIC void
e1ec3a88 1034S_procself_val(pTHX_ SV *sv, const char *arg0)
56cf6df8
RGS
1035{
1036 char buf[MAXPATHLEN];
1037 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1038
1039 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1040 includes a spurious NUL which will cause $^X to fail in system
1041 or backticks (this will prevent extensions from being built and
1042 many tests from working). readlink is not meant to add a NUL.
1043 Normal readlink works fine.
1044 */
1045 if (len > 0 && buf[len-1] == '\0') {
1046 len--;
1047 }
1048
1049 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1050 returning the text "unknown" from the readlink rather than the path
1051 to the executable (or returning an error from the readlink). Any valid
1052 path has a '/' in it somewhere, so use that to validate the result.
1053 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1054 */
1055 if (len > 0 && memchr(buf, '/', len)) {
1056 sv_setpvn(sv,buf,len);
1057 }
1058 else {
1059 sv_setpv(sv,arg0);
1060 }
1061}
1062#endif /* HAS_PROCSELFEXE */
b7975bdd
NC
1063
1064STATIC void
1065S_set_caret_X(pTHX) {
1066 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1067 if (tmpgv) {
1068#ifdef HAS_PROCSELFEXE
1069 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1070#else
1071#ifdef OS2
1072 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
1073#else
1074 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
1075#endif
1076#endif
1077 }
1078}
1079
954c1994
GS
1080/*
1081=for apidoc perl_parse
1082
1083Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1084
1085=cut
1086*/
1087
79072805 1088int
0cb96387 1089perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 1090{
27da23d5 1091 dVAR;
6224f72b 1092 I32 oldscope;
6224f72b 1093 int ret;
db36c5a1 1094 dJMPENV;
8d063cd8 1095
a687059c
LW
1096#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1097#ifdef IAMSUID
1098#undef IAMSUID
cea2e8a9 1099 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c 1100setuid perl scripts securely.\n");
ae3f3efd 1101#endif /* IAMSUID */
a687059c
LW
1102#endif
1103
b0891165
JH
1104#if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1105 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
103dd899 1106 * This MUST be done before any hash stores or fetches take place.
008fb0c0
NC
1107 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1108 * yourself, it is your responsibility to provide a good random seed!
830b38bd 1109 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
008fb0c0
NC
1110 if (!PL_rehash_seed_set)
1111 PL_rehash_seed = get_hash_seed();
b0891165 1112 {
bed60192
JH
1113 char *s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1114
1115 if (s) {
1116 int i = atoi(s);
1117
1118 if (i == 1)
1119 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n",
008fb0c0 1120 PL_rehash_seed);
bed60192 1121 }
b0891165
JH
1122 }
1123#endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1124
3280af22 1125 PL_origargc = argc;
e2975953 1126 PL_origargv = argv;
a0d0e21e 1127
54bfe034 1128 {
3cb9023d
JH
1129 /* Set PL_origalen be the sum of the contiguous argv[]
1130 * elements plus the size of the env in case that it is
e9137a8e 1131 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
3cb9023d
JH
1132 * as the maximum modifiable length of $0. In the worst case
1133 * the area we are able to modify is limited to the size of
43c32782 1134 * the original argv[0]. (See below for 'contiguous', though.)
3cb9023d 1135 * --jhi */
e1ec3a88 1136 const char *s = NULL;
54bfe034 1137 int i;
7d8e7db3
JH
1138 UV mask =
1139 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
43c32782
JH
1140 /* Do the mask check only if the args seem like aligned. */
1141 UV aligned =
1142 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1143
1144 /* See if all the arguments are contiguous in memory. Note
1145 * that 'contiguous' is a loose term because some platforms
1146 * align the argv[] and the envp[]. If the arguments look
1147 * like non-aligned, assume that they are 'strictly' or
1148 * 'traditionally' contiguous. If the arguments look like
1149 * aligned, we just check that they are within aligned
1150 * PTRSIZE bytes. As long as no system has something bizarre
1151 * like the argv[] interleaved with some other data, we are
1152 * fine. (Did I just evoke Murphy's Law?) --jhi */
c8941eeb
JH
1153 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1154 while (*s) s++;
1155 for (i = 1; i < PL_origargc; i++) {
1156 if ((PL_origargv[i] == s + 1
43c32782 1157#ifdef OS2
c8941eeb 1158 || PL_origargv[i] == s + 2
43c32782 1159#endif
c8941eeb
JH
1160 )
1161 ||
1162 (aligned &&
1163 (PL_origargv[i] > s &&
1164 PL_origargv[i] <=
1165 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1166 )
1167 {
1168 s = PL_origargv[i];
1169 while (*s) s++;
1170 }
1171 else
1172 break;
54bfe034 1173 }
54bfe034 1174 }
3cb9023d 1175 /* Can we grab env area too to be used as the area for $0? */
43c32782
JH
1176 if (PL_origenviron) {
1177 if ((PL_origenviron[0] == s + 1
1178#ifdef OS2
1179 || (PL_origenviron[0] == s + 9 && (s += 8))
1180#endif
1181 )
1182 ||
1183 (aligned &&
1184 (PL_origenviron[0] > s &&
1185 PL_origenviron[0] <=
1186 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1187 )
1188 {
1189#ifndef OS2
1190 s = PL_origenviron[0];
1191 while (*s) s++;
1192#endif
1193 my_setenv("NoNe SuCh", Nullch);
1194 /* Force copy of environment. */
1195 for (i = 1; PL_origenviron[i]; i++) {
1196 if (PL_origenviron[i] == s + 1
1197 ||
1198 (aligned &&
1199 (PL_origenviron[i] > s &&
1200 PL_origenviron[i] <=
1201 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1202 )
1203 {
1204 s = PL_origenviron[i];
1205 while (*s) s++;
1206 }
1207 else
1208 break;
54bfe034 1209 }
43c32782 1210 }
54bfe034 1211 }
284e1220 1212 PL_origalen = s - PL_origargv[0] + 1;
54bfe034
JH
1213 }
1214
3280af22 1215 if (PL_do_undump) {
a0d0e21e
LW
1216
1217 /* Come here if running an undumped a.out. */
1218
3280af22
NIS
1219 PL_origfilename = savepv(argv[0]);
1220 PL_do_undump = FALSE;
a0d0e21e 1221 cxstack_ix = -1; /* start label stack again */
748a9306 1222 init_ids();
b7975bdd
NC
1223 assert (!PL_tainted);
1224 TAINT;
1225 S_set_caret_X(aTHX);
1226 TAINT_NOT;
a0d0e21e
LW
1227 init_postdump_symbols(argc,argv,env);
1228 return 0;
1229 }
1230
3280af22 1231 if (PL_main_root) {
3280af22
NIS
1232 op_free(PL_main_root);
1233 PL_main_root = Nullop;
ff0cee69 1234 }
3280af22
NIS
1235 PL_main_start = Nullop;
1236 SvREFCNT_dec(PL_main_cv);
1237 PL_main_cv = Nullcv;
79072805 1238
3280af22
NIS
1239 time(&PL_basetime);
1240 oldscope = PL_scopestack_ix;
599cee73 1241 PL_dowarn = G_WARN_OFF;
f86702cc 1242
14dd3ad8 1243 JMPENV_PUSH(ret);
6224f72b 1244 switch (ret) {
312caa8e 1245 case 0:
14dd3ad8 1246 parse_body(env,xsinit);
7d30b5c4
GS
1247 if (PL_checkav)
1248 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1249 ret = 0;
1250 break;
6224f72b
GS
1251 case 1:
1252 STATUS_ALL_FAILURE;
1253 /* FALL THROUGH */
1254 case 2:
1255 /* my_exit() was called */
3280af22 1256 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1257 LEAVE;
1258 FREETMPS;
3280af22 1259 PL_curstash = PL_defstash;
7d30b5c4
GS
1260 if (PL_checkav)
1261 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1262 ret = STATUS_NATIVE_EXPORT;
1263 break;
6224f72b 1264 case 3:
bf49b057 1265 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1266 ret = 1;
1267 break;
6224f72b 1268 }
14dd3ad8
GS
1269 JMPENV_POP;
1270 return ret;
1271}
1272
312caa8e 1273STATIC void *
14dd3ad8 1274S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1275{
27da23d5 1276 dVAR;
312caa8e 1277 int argc = PL_origargc;
8f42b153 1278 char **argv = PL_origargv;
e1ec3a88 1279 const char *scriptname = NULL;
312caa8e 1280 VOL bool dosearch = FALSE;
e1ec3a88 1281 const char *validarg = "";
312caa8e
CS
1282 register SV *sv;
1283 register char *s;
e1ec3a88 1284 const char *cddir = Nullch;
20ef40cf 1285 bool minus_f = FALSE;
312caa8e 1286
ae3f3efd
PS
1287 PL_fdscript = -1;
1288 PL_suidscript = -1;
3280af22 1289 sv_setpvn(PL_linestr,"",0);
79cb57f6 1290 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1291 SAVEFREESV(sv);
1292 init_main_stash();
54310121 1293
6224f72b
GS
1294 for (argc--,argv++; argc > 0; argc--,argv++) {
1295 if (argv[0][0] != '-' || !argv[0][1])
1296 break;
1297#ifdef DOSUID
1298 if (*validarg)
1299 validarg = " PHOOEY ";
1300 else
1301 validarg = argv[0];
ae3f3efd
PS
1302 /*
1303 * Can we rely on the kernel to start scripts with argv[1] set to
1304 * contain all #! line switches (the whole line)? (argv[0] is set to
1305 * the interpreter name, argv[2] to the script name; argv[3] and
1306 * above may contain other arguments.)
1307 */
13281fa4 1308#endif
6224f72b
GS
1309 s = argv[0]+1;
1310 reswitch:
1311 switch (*s) {
729a02f2 1312 case 'C':
1d5472a9
GS
1313#ifndef PERL_STRICT_CR
1314 case '\r':
1315#endif
6224f72b
GS
1316 case ' ':
1317 case '0':
1318 case 'F':
1319 case 'a':
1320 case 'c':
1321 case 'd':
1322 case 'D':
1323 case 'h':
1324 case 'i':
1325 case 'l':
1326 case 'M':
1327 case 'm':
1328 case 'n':
1329 case 'p':
1330 case 's':
1331 case 'u':
1332 case 'U':
1333 case 'v':
599cee73
PM
1334 case 'W':
1335 case 'X':
6224f72b 1336 case 'w':
06492da6 1337 case 'A':
155aba94 1338 if ((s = moreswitches(s)))
6224f72b
GS
1339 goto reswitch;
1340 break;
33b78306 1341
1dbad523 1342 case 't':
22f7c9c9 1343 CHECK_MALLOC_TOO_LATE_FOR('t');
317ea90d
MS
1344 if( !PL_tainting ) {
1345 PL_taint_warn = TRUE;
1346 PL_tainting = TRUE;
1347 }
1348 s++;
1349 goto reswitch;
6224f72b 1350 case 'T':
22f7c9c9 1351 CHECK_MALLOC_TOO_LATE_FOR('T');
3280af22 1352 PL_tainting = TRUE;
317ea90d 1353 PL_taint_warn = FALSE;
6224f72b
GS
1354 s++;
1355 goto reswitch;
f86702cc 1356
6224f72b 1357 case 'e':
bf4acbe4
GS
1358#ifdef MACOS_TRADITIONAL
1359 /* ignore -e for Dev:Pseudo argument */
1360 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
e55ac0fa 1361 break;
bf4acbe4 1362#endif
ae3f3efd 1363 forbid_setid("-e");
3280af22 1364 if (!PL_e_script) {
79cb57f6 1365 PL_e_script = newSVpvn("",0);
0cb96387 1366 filter_add(read_e_script, NULL);
6224f72b
GS
1367 }
1368 if (*++s)
3280af22 1369 sv_catpv(PL_e_script, s);
6224f72b 1370 else if (argv[1]) {
3280af22 1371 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1372 argc--,argv++;
1373 }
1374 else
cea2e8a9 1375 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1376 sv_catpv(PL_e_script, "\n");
6224f72b 1377 break;
afe37c7d 1378
20ef40cf
GA
1379 case 'f':
1380 minus_f = TRUE;
1381 s++;
1382 goto reswitch;
1383
6224f72b
GS
1384 case 'I': /* -I handled both here and in moreswitches() */
1385 forbid_setid("-I");
1386 if (!*++s && (s=argv[1]) != Nullch) {
1387 argc--,argv++;
1388 }
6224f72b 1389 if (s && *s) {
0df16ed7
GS
1390 char *p;
1391 STRLEN len = strlen(s);
1392 p = savepvn(s, len);
88fe16b2 1393 incpush(p, TRUE, TRUE, FALSE, FALSE);
0df16ed7
GS
1394 sv_catpvn(sv, "-I", 2);
1395 sv_catpvn(sv, p, len);
1396 sv_catpvn(sv, " ", 1);
6224f72b 1397 Safefree(p);
0df16ed7
GS
1398 }
1399 else
a67e862a 1400 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1401 break;
1402 case 'P':
1403 forbid_setid("-P");
3280af22 1404 PL_preprocess = TRUE;
6224f72b
GS
1405 s++;
1406 goto reswitch;
1407 case 'S':
1408 forbid_setid("-S");
1409 dosearch = TRUE;
1410 s++;
1411 goto reswitch;
1412 case 'V':
3280af22
NIS
1413 if (!PL_preambleav)
1414 PL_preambleav = newAV();
1415 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1416 if (*++s != ':') {
efcaa95b
YST
1417 STRLEN opts;
1418
3280af22 1419 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1420#ifdef VMS
6b88bc9c 1421 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1422#else
3280af22 1423 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1424#endif
efcaa95b
YST
1425 opts = SvCUR(PL_Sv);
1426
3280af22 1427 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1428# ifdef DEBUGGING
3280af22 1429 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1430# endif
6224f72b 1431# ifdef MULTIPLICITY
8f872242 1432 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1433# endif
4d1ff10f
AB
1434# ifdef USE_5005THREADS
1435 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1436# endif
ac5e8965
JH
1437# ifdef USE_ITHREADS
1438 sv_catpv(PL_Sv," USE_ITHREADS");
1439# endif
10cc9d2a
JH
1440# ifdef USE_64_BIT_INT
1441 sv_catpv(PL_Sv," USE_64_BIT_INT");
1442# endif
1443# ifdef USE_64_BIT_ALL
1444 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1445# endif
1446# ifdef USE_LONG_DOUBLE
1447 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1448# endif
53430762
JH
1449# ifdef USE_LARGE_FILES
1450 sv_catpv(PL_Sv," USE_LARGE_FILES");
1451# endif
ac5e8965
JH
1452# ifdef USE_SOCKS
1453 sv_catpv(PL_Sv," USE_SOCKS");
1454# endif
20ef40cf
GA
1455# ifdef USE_SITECUSTOMIZE
1456 sv_catpv(PL_Sv," USE_SITECUSTOMIZE");
1457# endif
b363f7ed
GS
1458# ifdef PERL_IMPLICIT_CONTEXT
1459 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1460# endif
1461# ifdef PERL_IMPLICIT_SYS
1462 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1463# endif
efcaa95b
YST
1464
1465 while (SvCUR(PL_Sv) > opts+76) {
1466 /* find last space after "options: " and before col 76 */
1467
dd374669
AL
1468 const char *space;
1469 char *pv = SvPV_nolen(PL_Sv);
1470 const char c = pv[opts+76];
efcaa95b
YST
1471 pv[opts+76] = '\0';
1472 space = strrchr(pv+opts+26, ' ');
1473 pv[opts+76] = c;
1474 if (!space) break; /* "Can't happen" */
1475
1476 /* break the line before that space */
1477
1478 opts = space - pv;
1479 sv_insert(PL_Sv, opts, 0,
1480 "\\n ", 25);
1481 }
1482
3280af22 1483 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1484
6224f72b
GS
1485#if defined(LOCAL_PATCH_COUNT)
1486 if (LOCAL_PATCH_COUNT > 0) {
1487 int i;
3280af22 1488 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1489 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1490 if (PL_localpatches[i])
acb03d05
AB
1491 Perl_sv_catpvf(aTHX_ PL_Sv,"q%c\t%s\n%c,",
1492 0, PL_localpatches[i], 0);
6224f72b
GS
1493 }
1494 }
1495#endif
cea2e8a9 1496 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1497#ifdef __DATE__
1498# ifdef __TIME__
cea2e8a9 1499 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1500# else
cea2e8a9 1501 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1502# endif
1503#endif
3280af22 1504 sv_catpv(PL_Sv, "; \
6224f72b 1505$\"=\"\\n \"; \
69fcd688
JH
1506@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1507#ifdef __CYGWIN__
1508 sv_catpv(PL_Sv,"\
1509push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1510#endif
1511 sv_catpv(PL_Sv, "\
6224f72b
GS
1512print \" \\%ENV:\\n @env\\n\" if @env; \
1513print \" \\@INC:\\n @INC\\n\";");
1514 }
1515 else {
3280af22
NIS
1516 PL_Sv = newSVpv("config_vars(qw(",0);
1517 sv_catpv(PL_Sv, ++s);
1518 sv_catpv(PL_Sv, "))");
6224f72b
GS
1519 s += strlen(s);
1520 }
3280af22 1521 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1522 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1523 goto reswitch;
1524 case 'x':
3280af22 1525 PL_doextract = TRUE;
6224f72b
GS
1526 s++;
1527 if (*s)
f4c556ac 1528 cddir = s;
6224f72b
GS
1529 break;
1530 case 0:
1531 break;
1532 case '-':
1533 if (!*++s || isSPACE(*s)) {
1534 argc--,argv++;
1535 goto switch_end;
1536 }
1537 /* catch use of gnu style long options */
1538 if (strEQ(s, "version")) {
dd374669 1539 s = (char *)"v";
6224f72b
GS
1540 goto reswitch;
1541 }
1542 if (strEQ(s, "help")) {
dd374669 1543 s = (char *)"h";
6224f72b
GS
1544 goto reswitch;
1545 }
1546 s--;
1547 /* FALL THROUGH */
1548 default:
cea2e8a9 1549 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1550 }
1551 }
6224f72b 1552 switch_end:
54310121 1553
f675dbe5
CB
1554 if (
1555#ifndef SECURE_INTERNAL_GETENV
1556 !PL_tainting &&
1557#endif
cf756827 1558 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1559 {
e1ec3a88 1560 const char *popt = s;
74288ac8
GS
1561 while (isSPACE(*s))
1562 s++;
317ea90d 1563 if (*s == '-' && *(s+1) == 'T') {
22f7c9c9 1564 CHECK_MALLOC_TOO_LATE_FOR('T');
74288ac8 1565 PL_tainting = TRUE;
317ea90d
MS
1566 PL_taint_warn = FALSE;
1567 }
74288ac8 1568 else {
cf756827 1569 char *popt_copy = Nullch;
74288ac8 1570 while (s && *s) {
4ea8f8fb 1571 char *d;
74288ac8
GS
1572 while (isSPACE(*s))
1573 s++;
1574 if (*s == '-') {
1575 s++;
1576 if (isSPACE(*s))
1577 continue;
1578 }
4ea8f8fb 1579 d = s;
74288ac8
GS
1580 if (!*s)
1581 break;
06492da6 1582 if (!strchr("DIMUdmtwA", *s))
cea2e8a9 1583 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1584 while (++s && *s) {
1585 if (isSPACE(*s)) {
cf756827
GS
1586 if (!popt_copy) {
1587 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1588 s = popt_copy + (s - popt);
1589 d = popt_copy + (d - popt);
1590 }
4ea8f8fb
MS
1591 *s++ = '\0';
1592 break;
1593 }
1594 }
1c4db469 1595 if (*d == 't') {
317ea90d
MS
1596 if( !PL_tainting ) {
1597 PL_taint_warn = TRUE;
1598 PL_tainting = TRUE;
1599 }
1c4db469
RGS
1600 } else {
1601 moreswitches(d);
1602 }
6224f72b 1603 }
6224f72b
GS
1604 }
1605 }
a0d0e21e 1606
20ef40cf
GA
1607#ifdef USE_SITECUSTOMIZE
1608 if (!minus_f) {
1609 if (!PL_preambleav)
1610 PL_preambleav = newAV();
1611 av_unshift(PL_preambleav, 1);
1612 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1613 }
1614#endif
1615
317ea90d
MS
1616 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1617 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1618 }
1619
6224f72b
GS
1620 if (!scriptname)
1621 scriptname = argv[0];
3280af22 1622 if (PL_e_script) {
6224f72b
GS
1623 argc++,argv--;
1624 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1625 }
1626 else if (scriptname == Nullch) {
1627#ifdef MSDOS
1628 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1629 moreswitches("h");
1630#endif
1631 scriptname = "-";
1632 }
1633
b7975bdd
NC
1634 /* Set $^X early so that it can be used for relocatable paths in @INC */
1635 assert (!PL_tainted);
1636 TAINT;
1637 S_set_caret_X(aTHX);
1638 TAINT_NOT;
6224f72b
GS
1639 init_perllib();
1640
c5cccb17 1641 open_script(scriptname,dosearch,sv);
6224f72b 1642
c5cccb17 1643 validate_suid(validarg, scriptname);
6224f72b 1644
64ca3a65 1645#ifndef PERL_MICRO
0b5b802d
GS
1646#if defined(SIGCHLD) || defined(SIGCLD)
1647 {
1648#ifndef SIGCHLD
1649# define SIGCHLD SIGCLD
1650#endif
1651 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1652 if (sigstate == SIG_IGN) {
1653 if (ckWARN(WARN_SIGNAL))
9014280d 1654 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
0b5b802d
GS
1655 "Can't ignore signal CHLD, forcing to default");
1656 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1657 }
1658 }
1659#endif
64ca3a65 1660#endif
0b5b802d 1661
bf4acbe4
GS
1662#ifdef MACOS_TRADITIONAL
1663 if (PL_doextract || gMacPerl_AlwaysExtract) {
1664#else
f4c556ac 1665 if (PL_doextract) {
bf4acbe4 1666#endif
6224f72b 1667 find_beginning();
dd374669 1668 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
f4c556ac
GS
1669 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1670
1671 }
6224f72b 1672
3280af22
NIS
1673 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1674 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1675 CvUNIQUE_on(PL_compcv);
1676
dd2155a4 1677 CvPADLIST(PL_compcv) = pad_new(0);
4d1ff10f 1678#ifdef USE_5005THREADS
533c011a
NIS
1679 CvOWNER(PL_compcv) = 0;
1680 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1681 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1682#endif /* USE_5005THREADS */
6224f72b 1683
0c4f7ff0 1684 boot_core_PerlIO();
6224f72b 1685 boot_core_UNIVERSAL();
09bef843 1686 boot_core_xsutils();
6224f72b
GS
1687
1688 if (xsinit)
acfe0abc 1689 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1690#ifndef PERL_MICRO
ed79a026 1691#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1692 init_os_extras();
6224f72b 1693#endif
64ca3a65 1694#endif
6224f72b 1695
29209bc5 1696#ifdef USE_SOCKS
1b9c9cf5
DH
1697# ifdef HAS_SOCKS5_INIT
1698 socks5_init(argv[0]);
1699# else
29209bc5 1700 SOCKSinit(argv[0]);
1b9c9cf5 1701# endif
ac27b0f5 1702#endif
29209bc5 1703
6224f72b
GS
1704 init_predump_symbols();
1705 /* init_postdump_symbols not currently designed to be called */
1706 /* more than once (ENV isn't cleared first, for example) */
1707 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1708 if (!PL_do_undump)
6224f72b
GS
1709 init_postdump_symbols(argc,argv,env);
1710
27da23d5
JH
1711 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
1712 * or explicitly in some platforms.
085a54d9 1713 * locale.c:Perl_init_i18nl10n() if the environment
a05d7ebb 1714 * look like the user wants to use UTF-8. */
27da23d5
JH
1715#if defined(SYMBIAN)
1716 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
1717#endif
06e66572
JH
1718 if (PL_unicode) {
1719 /* Requires init_predump_symbols(). */
a05d7ebb 1720 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
06e66572
JH
1721 IO* io;
1722 PerlIO* fp;
1723 SV* sv;
1724
a05d7ebb 1725 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
06e66572 1726 * and the default open disciplines. */
a05d7ebb
JH
1727 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
1728 PL_stdingv && (io = GvIO(PL_stdingv)) &&
1729 (fp = IoIFP(io)))
1730 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1731 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
1732 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
1733 (fp = IoOFP(io)))
1734 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1735 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
1736 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
1737 (fp = IoOFP(io)))
1738 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1739 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
1740 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1741 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
1742 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
1743 if (in) {
1744 if (out)
1745 sv_setpvn(sv, ":utf8\0:utf8", 11);
1746 else
1747 sv_setpvn(sv, ":utf8\0", 6);
1748 }
1749 else if (out)
1750 sv_setpvn(sv, "\0:utf8", 6);
1751 SvSETMAGIC(sv);
1752 }
b310b053
JH
1753 }
1754 }
1755
4ffa73a3
JH
1756 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
1757 if (strEQ(s, "unsafe"))
1758 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
1759 else if (strEQ(s, "safe"))
1760 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
1761 else
1762 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
1763 }
1764
6224f72b
GS
1765 init_lexer();
1766
1767 /* now parse the script */
1768
93189314 1769 SETERRNO(0,SS_NORMAL);
3280af22 1770 PL_error_count = 0;
bf4acbe4
GS
1771#ifdef MACOS_TRADITIONAL
1772 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1773 if (PL_minus_c)
1774 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1775 else {
1776 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1777 MacPerl_MPWFileName(PL_origfilename));
1778 }
1779 }
1780#else
3280af22
NIS
1781 if (yyparse() || PL_error_count) {
1782 if (PL_minus_c)
cea2e8a9 1783 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1784 else {
cea2e8a9 1785 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1786 PL_origfilename);
6224f72b
GS
1787 }
1788 }
bf4acbe4 1789#endif
57843af0 1790 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1791 PL_curstash = PL_defstash;
1792 PL_preprocess = FALSE;
1793 if (PL_e_script) {
1794 SvREFCNT_dec(PL_e_script);
1795 PL_e_script = Nullsv;
6224f72b
GS
1796 }
1797
3280af22 1798 if (PL_do_undump)
6224f72b
GS
1799 my_unexec();
1800
57843af0
GS
1801 if (isWARN_ONCE) {
1802 SAVECOPFILE(PL_curcop);
1803 SAVECOPLINE(PL_curcop);
3280af22 1804 gv_check(PL_defstash);
57843af0 1805 }
6224f72b
GS
1806
1807 LEAVE;
1808 FREETMPS;
1809
1810#ifdef MYMALLOC
1811 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1812 dump_mstats("after compilation:");
1813#endif
1814
1815 ENTER;
3280af22 1816 PL_restartop = 0;
312caa8e 1817 return NULL;
6224f72b
GS
1818}
1819
954c1994
GS
1820/*
1821=for apidoc perl_run
1822
1823Tells a Perl interpreter to run. See L<perlembed>.
1824
1825=cut
1826*/
1827
6224f72b 1828int
0cb96387 1829perl_run(pTHXx)
6224f72b 1830{
6224f72b 1831 I32 oldscope;
14dd3ad8 1832 int ret = 0;
db36c5a1 1833 dJMPENV;
6224f72b 1834
3280af22 1835 oldscope = PL_scopestack_ix;
96e176bf
CL
1836#ifdef VMS
1837 VMSISH_HUSHED = 0;
1838#endif
6224f72b 1839
14dd3ad8 1840 JMPENV_PUSH(ret);
6224f72b
GS
1841 switch (ret) {
1842 case 1:
1843 cxstack_ix = -1; /* start context stack again */
312caa8e 1844 goto redo_body;
14dd3ad8 1845 case 0: /* normal completion */
14dd3ad8
GS
1846 redo_body:
1847 run_body(oldscope);
14dd3ad8
GS
1848 /* FALL THROUGH */
1849 case 2: /* my_exit() */
3280af22 1850 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1851 LEAVE;
1852 FREETMPS;
3280af22 1853 PL_curstash = PL_defstash;
3a1ee7e8 1854 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
1855 PL_endav && !PL_minus_c)
1856 call_list(oldscope, PL_endav);
6224f72b
GS
1857#ifdef MYMALLOC
1858 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1859 dump_mstats("after execution: ");
1860#endif
14dd3ad8
GS
1861 ret = STATUS_NATIVE_EXPORT;
1862 break;
6224f72b 1863 case 3:
312caa8e
CS
1864 if (PL_restartop) {
1865 POPSTACK_TO(PL_mainstack);
1866 goto redo_body;
6224f72b 1867 }
bf49b057 1868 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1869 FREETMPS;
14dd3ad8
GS
1870 ret = 1;
1871 break;
6224f72b
GS
1872 }
1873
14dd3ad8
GS
1874 JMPENV_POP;
1875 return ret;
312caa8e
CS
1876}
1877
14dd3ad8 1878
dd374669 1879STATIC void
14dd3ad8
GS
1880S_run_body(pTHX_ I32 oldscope)
1881{
6224f72b 1882 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1883 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1884
3280af22 1885 if (!PL_restartop) {
6224f72b 1886 DEBUG_x(dump_all());
ecae49c0
NC
1887 if (!DEBUG_q_TEST)
1888 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1889 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1890 PTR2UV(thr)));
6224f72b 1891
3280af22 1892 if (PL_minus_c) {
bf4acbe4 1893#ifdef MACOS_TRADITIONAL
e69a2255
JH
1894 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
1895 (gMacPerl_ErrorFormat ? "# " : ""),
1896 MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1897#else
bf49b057 1898 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1899#endif
6224f72b
GS
1900 my_exit(0);
1901 }
3280af22 1902 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1903 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1904 if (PL_initav)
1905 call_list(oldscope, PL_initav);
6224f72b
GS
1906 }
1907
1908 /* do it */
1909
3280af22 1910 if (PL_restartop) {
533c011a 1911 PL_op = PL_restartop;
3280af22 1912 PL_restartop = 0;
cea2e8a9 1913 CALLRUNOPS(aTHX);
6224f72b 1914 }
3280af22
NIS
1915 else if (PL_main_start) {
1916 CvDEPTH(PL_main_cv) = 1;
533c011a 1917 PL_op = PL_main_start;
cea2e8a9 1918 CALLRUNOPS(aTHX);
6224f72b 1919 }
f6b3007c
JH
1920 my_exit(0);
1921 /* NOTREACHED */
6224f72b
GS
1922}
1923
954c1994 1924/*
ccfc67b7
JH
1925=head1 SV Manipulation Functions
1926
954c1994
GS
1927=for apidoc p||get_sv
1928
1929Returns the SV of the specified Perl scalar. If C<create> is set and the
1930Perl variable does not exist then it will be created. If C<create> is not
1931set and the variable does not exist then NULL is returned.
1932
1933=cut
1934*/
1935
6224f72b 1936SV*
864dbfa3 1937Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1938{
1939 GV *gv;
4d1ff10f 1940#ifdef USE_5005THREADS
6224f72b
GS
1941 if (name[1] == '\0' && !isALPHA(name[0])) {
1942 PADOFFSET tmp = find_threadsv(name);
411caa50 1943 if (tmp != NOT_IN_PAD)
6224f72b 1944 return THREADSV(tmp);
6224f72b 1945 }
4d1ff10f 1946#endif /* USE_5005THREADS */
6224f72b
GS
1947 gv = gv_fetchpv(name, create, SVt_PV);
1948 if (gv)
1949 return GvSV(gv);
1950 return Nullsv;
1951}
1952
954c1994 1953/*
ccfc67b7
JH
1954=head1 Array Manipulation Functions
1955
954c1994
GS
1956=for apidoc p||get_av
1957
1958Returns the AV of the specified Perl array. If C<create> is set and the
1959Perl variable does not exist then it will be created. If C<create> is not
1960set and the variable does not exist then NULL is returned.
1961
1962=cut
1963*/
1964
6224f72b 1965AV*
864dbfa3 1966Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1967{
1968 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1969 if (create)
1970 return GvAVn(gv);
1971 if (gv)
1972 return GvAV(gv);
1973 return Nullav;
1974}
1975
954c1994 1976/*
ccfc67b7
JH
1977=head1 Hash Manipulation Functions
1978
954c1994
GS
1979=for apidoc p||get_hv
1980
1981Returns the HV of the specified Perl hash. If C<create> is set and the
1982Perl variable does not exist then it will be created. If C<create> is not
1983set and the variable does not exist then NULL is returned.
1984
1985=cut
1986*/
1987
6224f72b 1988HV*
864dbfa3 1989Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1990{
a0d0e21e
LW
1991 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1992 if (create)
1993 return GvHVn(gv);
1994 if (gv)
1995 return GvHV(gv);
1996 return Nullhv;
1997}
1998
954c1994 1999/*
ccfc67b7
JH
2000=head1 CV Manipulation Functions
2001
954c1994
GS
2002=for apidoc p||get_cv
2003
2004Returns the CV of the specified Perl subroutine. If C<create> is set and
2005the Perl subroutine does not exist then it will be declared (which has the
2006same effect as saying C<sub name;>). If C<create> is not set and the
2007subroutine does not exist then NULL is returned.
2008
2009=cut
2010*/
2011
a0d0e21e 2012CV*
864dbfa3 2013Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
2014{
2015 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 2016 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
2017 /* XXX this is probably not what they think they're getting.
2018 * It has the same effect as "sub name;", i.e. just a forward
2019 * declaration! */
8ebc5c01 2020 if (create && !GvCVu(gv))
774d564b 2021 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 2022 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 2023 Nullop,
a0d0e21e
LW
2024 Nullop);
2025 if (gv)
8ebc5c01 2026 return GvCVu(gv);
a0d0e21e
LW
2027 return Nullcv;
2028}
2029
79072805
LW
2030/* Be sure to refetch the stack pointer after calling these routines. */
2031
954c1994 2032/*
ccfc67b7
JH
2033
2034=head1 Callback Functions
2035
954c1994
GS
2036=for apidoc p||call_argv
2037
2038Performs a callback to the specified Perl sub. See L<perlcall>.
2039
2040=cut
2041*/
2042
a0d0e21e 2043I32
8f42b153 2044Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 2045
8ac85365
NIS
2046 /* See G_* flags in cop.h */
2047 /* null terminated arg list */
8990e307 2048{
a0d0e21e 2049 dSP;
8990e307 2050
924508f0 2051 PUSHMARK(SP);
a0d0e21e 2052 if (argv) {
8990e307 2053 while (*argv) {
a0d0e21e 2054 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
2055 argv++;
2056 }
a0d0e21e 2057 PUTBACK;
8990e307 2058 }
864dbfa3 2059 return call_pv(sub_name, flags);
8990e307
LW
2060}
2061
954c1994
GS
2062/*
2063=for apidoc p||call_pv
2064
2065Performs a callback to the specified Perl sub. See L<perlcall>.
2066
2067=cut
2068*/
2069
a0d0e21e 2070I32
864dbfa3 2071Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
2072 /* name of the subroutine */
2073 /* See G_* flags in cop.h */
a0d0e21e 2074{
864dbfa3 2075 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
2076}
2077
954c1994
GS
2078/*
2079=for apidoc p||call_method
2080
2081Performs a callback to the specified Perl method. The blessed object must
2082be on the stack. See L<perlcall>.
2083
2084=cut
2085*/
2086
a0d0e21e 2087I32
864dbfa3 2088Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
2089 /* name of the subroutine */
2090 /* See G_* flags in cop.h */
a0d0e21e 2091{
968b3946 2092 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
2093}
2094
2095/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
2096/*
2097=for apidoc p||call_sv
2098
2099Performs a callback to the Perl sub whose name is in the SV. See
2100L<perlcall>.
2101
2102=cut
2103*/
2104
a0d0e21e 2105I32
864dbfa3 2106Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 2107 /* See G_* flags in cop.h */
a0d0e21e 2108{
27da23d5 2109 dVAR; dSP;
a0d0e21e 2110 LOGOP myop; /* fake syntax tree node */
968b3946 2111 UNOP method_op;
aa689395 2112 I32 oldmark;
13689cfe 2113 volatile I32 retval = 0;
a0d0e21e 2114 I32 oldscope;
54310121 2115 bool oldcatch = CATCH_GET;
6224f72b 2116 int ret;
533c011a 2117 OP* oldop = PL_op;
db36c5a1 2118 dJMPENV;
1e422769 2119
a0d0e21e
LW
2120 if (flags & G_DISCARD) {
2121 ENTER;
2122 SAVETMPS;
2123 }
2124
aa689395 2125 Zero(&myop, 1, LOGOP);
54310121 2126 myop.op_next = Nullop;
f51d4af5 2127 if (!(flags & G_NOARGS))
aa689395 2128 myop.op_flags |= OPf_STACKED;
54310121
PP
2129 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2130 (flags & G_ARRAY) ? OPf_WANT_LIST :
2131 OPf_WANT_SCALAR);
462e5cf6 2132 SAVEOP();
533c011a 2133 PL_op = (OP*)&myop;
aa689395 2134
3280af22
NIS
2135 EXTEND(PL_stack_sp, 1);
2136 *++PL_stack_sp = sv;
aa689395 2137 oldmark = TOPMARK;
3280af22 2138 oldscope = PL_scopestack_ix;
a0d0e21e 2139
3280af22 2140 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 2141 /* Handle first BEGIN of -d. */
3280af22 2142 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
2143 /* Try harder, since this may have been a sighandler, thus
2144 * curstash may be meaningless. */
3280af22 2145 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 2146 && !(flags & G_NODEBUG))
533c011a 2147 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 2148
968b3946
GS
2149 if (flags & G_METHOD) {
2150 Zero(&method_op, 1, UNOP);
2151 method_op.op_next = PL_op;
2152 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2153 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 2154 PL_op = (OP*)&method_op;
968b3946
GS
2155 }
2156
312caa8e 2157 if (!(flags & G_EVAL)) {
0cdb2077 2158 CATCH_SET(TRUE);
14dd3ad8 2159 call_body((OP*)&myop, FALSE);
312caa8e 2160 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 2161 CATCH_SET(oldcatch);
312caa8e
CS
2162 }
2163 else {
d78bda3d 2164 myop.op_other = (OP*)&myop;
3280af22 2165 PL_markstack_ptr--;
4633a7c4
LW
2166 /* we're trying to emulate pp_entertry() here */
2167 {
c09156bb 2168 register PERL_CONTEXT *cx;
f54cb97a 2169 const I32 gimme = GIMME_V;
ac27b0f5 2170
4633a7c4
LW
2171 ENTER;
2172 SAVETMPS;
ac27b0f5 2173
1d76a5c3 2174 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 2175 PUSHEVAL(cx, 0, 0);
533c011a 2176 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 2177
faef0170 2178 PL_in_eval = EVAL_INEVAL;
4633a7c4 2179 if (flags & G_KEEPERR)
faef0170 2180 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 2181 else
c69006e4 2182 sv_setpvn(ERRSV,"",0);
4633a7c4 2183 }
3280af22 2184 PL_markstack_ptr++;
a0d0e21e 2185
14dd3ad8 2186 JMPENV_PUSH(ret);
6224f72b
GS
2187 switch (ret) {
2188 case 0:
14dd3ad8
GS
2189 redo_body:
2190 call_body((OP*)&myop, FALSE);
312caa8e
CS
2191 retval = PL_stack_sp - (PL_stack_base + oldmark);
2192 if (!(flags & G_KEEPERR))
c69006e4 2193 sv_setpvn(ERRSV,"",0);
a0d0e21e 2194 break;
6224f72b 2195 case 1:
f86702cc 2196 STATUS_ALL_FAILURE;
a0d0e21e 2197 /* FALL THROUGH */
6224f72b 2198 case 2:
a0d0e21e 2199 /* my_exit() was called */
3280af22 2200 PL_curstash = PL_defstash;
a0d0e21e 2201 FREETMPS;
14dd3ad8 2202 JMPENV_POP;
cc3604b1 2203 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2204 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2205 my_exit_jump();
a0d0e21e 2206 /* NOTREACHED */
6224f72b 2207 case 3:
3280af22 2208 if (PL_restartop) {
533c011a 2209 PL_op = PL_restartop;
3280af22 2210 PL_restartop = 0;
312caa8e 2211 goto redo_body;
a0d0e21e 2212 }
3280af22 2213 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2214 if (flags & G_ARRAY)
2215 retval = 0;
2216 else {
2217 retval = 1;
3280af22 2218 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 2219 }
312caa8e 2220 break;
a0d0e21e 2221 }
a0d0e21e 2222
3280af22 2223 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
2224 SV **newsp;
2225 PMOP *newpm;
2226 I32 gimme;
c09156bb 2227 register PERL_CONTEXT *cx;
a0a2876f
LW
2228 I32 optype;
2229
2230 POPBLOCK(cx,newpm);
2231 POPEVAL(cx);
3280af22 2232 PL_curpm = newpm;
a0a2876f 2233 LEAVE;
a0d0e21e 2234 }
14dd3ad8 2235 JMPENV_POP;
a0d0e21e 2236 }
1e422769 2237
a0d0e21e 2238 if (flags & G_DISCARD) {
3280af22 2239 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2240 retval = 0;
2241 FREETMPS;
2242 LEAVE;
2243 }
533c011a 2244 PL_op = oldop;
a0d0e21e
LW
2245 return retval;
2246}
2247
312caa8e 2248STATIC void
dd374669 2249S_call_body(pTHX_ const OP *myop, bool is_eval)
312caa8e 2250{
312caa8e
CS
2251 if (PL_op == myop) {
2252 if (is_eval)
f807eda9 2253 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 2254 else
f807eda9 2255 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
2256 }
2257 if (PL_op)
cea2e8a9 2258 CALLRUNOPS(aTHX);
312caa8e
CS
2259}
2260
6e72f9df 2261/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 2262
954c1994
GS
2263/*
2264=for apidoc p||eval_sv
2265
2266Tells Perl to C<eval> the string in the SV.
2267
2268=cut
2269*/
2270
a0d0e21e 2271I32
864dbfa3 2272Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 2273
8ac85365 2274 /* See G_* flags in cop.h */
a0d0e21e 2275{
924508f0 2276 dSP;
a0d0e21e 2277 UNOP myop; /* fake syntax tree node */
8fa7f367 2278 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 2279 volatile I32 retval = 0;
6224f72b 2280 int ret;
533c011a 2281 OP* oldop = PL_op;
db36c5a1 2282 dJMPENV;
84902520 2283
4633a7c4
LW
2284 if (flags & G_DISCARD) {
2285 ENTER;
2286 SAVETMPS;
2287 }
2288
462e5cf6 2289 SAVEOP();
533c011a
NIS
2290 PL_op = (OP*)&myop;
2291 Zero(PL_op, 1, UNOP);
3280af22
NIS
2292 EXTEND(PL_stack_sp, 1);
2293 *++PL_stack_sp = sv;
79072805 2294
4633a7c4
LW
2295 if (!(flags & G_NOARGS))
2296 myop.op_flags = OPf_STACKED;
79072805 2297 myop.op_next = Nullop;
6e72f9df 2298 myop.op_type = OP_ENTEREVAL;
54310121
PP
2299 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2300 (flags & G_ARRAY) ? OPf_WANT_LIST :
2301 OPf_WANT_SCALAR);
6e72f9df
PP
2302 if (flags & G_KEEPERR)
2303 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2304
dedbcade
DM
2305 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2306 * before a PUSHEVAL, which corrupts the stack after a croak */
2307 TAINT_PROPER("eval_sv()");
2308
14dd3ad8 2309 JMPENV_PUSH(ret);
6224f72b
GS
2310 switch (ret) {
2311 case 0:
14dd3ad8
GS
2312 redo_body:
2313 call_body((OP*)&myop,TRUE);
312caa8e
CS
2314 retval = PL_stack_sp - (PL_stack_base + oldmark);
2315 if (!(flags & G_KEEPERR))
c69006e4 2316 sv_setpvn(ERRSV,"",0);
4633a7c4 2317 break;
6224f72b 2318 case 1:
f86702cc 2319 STATUS_ALL_FAILURE;
4633a7c4 2320 /* FALL THROUGH */
6224f72b 2321 case 2:
4633a7c4 2322 /* my_exit() was called */
3280af22 2323 PL_curstash = PL_defstash;
4633a7c4 2324 FREETMPS;
14dd3ad8 2325 JMPENV_POP;
cc3604b1 2326 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2327 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2328 my_exit_jump();
4633a7c4 2329 /* NOTREACHED */
6224f72b 2330 case 3:
3280af22 2331 if (PL_restartop) {
533c011a 2332 PL_op = PL_restartop;
3280af22 2333 PL_restartop = 0;
312caa8e 2334 goto redo_body;
4633a7c4 2335 }
3280af22 2336 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2337 if (flags & G_ARRAY)
2338 retval = 0;
2339 else {
2340 retval = 1;
3280af22 2341 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2342 }
312caa8e 2343 break;
4633a7c4
LW
2344 }
2345
14dd3ad8 2346 JMPENV_POP;
4633a7c4 2347 if (flags & G_DISCARD) {
3280af22 2348 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2349 retval = 0;
2350 FREETMPS;
2351 LEAVE;
2352 }
533c011a 2353 PL_op = oldop;
4633a7c4
LW
2354 return retval;
2355}
2356
954c1994
GS
2357/*
2358=for apidoc p||eval_pv
2359
2360Tells Perl to C<eval> the given string and return an SV* result.
2361
2362=cut
2363*/
2364
137443ea 2365SV*
864dbfa3 2366Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2367{
2368 dSP;
2369 SV* sv = newSVpv(p, 0);
2370
864dbfa3 2371 eval_sv(sv, G_SCALAR);
137443ea
PP
2372 SvREFCNT_dec(sv);
2373
2374 SPAGAIN;
2375 sv = POPs;
2376 PUTBACK;
2377
2d8e6c8d 2378 if (croak_on_error && SvTRUE(ERRSV)) {
0510663f 2379 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2d8e6c8d 2380 }
137443ea
PP
2381
2382 return sv;
2383}
2384
4633a7c4
LW
2385/* Require a module. */
2386
954c1994 2387/*
ccfc67b7
JH
2388=head1 Embedding Functions
2389
954c1994
GS
2390=for apidoc p||require_pv
2391
7d3fb230
BS
2392Tells Perl to C<require> the file named by the string argument. It is
2393analogous to the Perl code C<eval "require '$file'">. It's even
2307c6d0 2394implemented that way; consider using load_module instead.
954c1994 2395
7d3fb230 2396=cut */
954c1994 2397
4633a7c4 2398void
864dbfa3 2399Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2400{
d3acc0f7
JP
2401 SV* sv;
2402 dSP;
e788e7d3 2403 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2404 PUTBACK;
2405 sv = sv_newmortal();
4633a7c4
LW
2406 sv_setpv(sv, "require '");
2407 sv_catpv(sv, pv);
2408 sv_catpv(sv, "'");
864dbfa3 2409 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2410 SPAGAIN;
2411 POPSTACK;
79072805
LW
2412}
2413
79072805 2414void
e1ec3a88 2415Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
79072805
LW
2416{
2417 register GV *gv;
2418
155aba94 2419 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2420 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2421}
2422
76e3520e 2423STATIC void
e1ec3a88 2424S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
4633a7c4 2425{
ab821d7f 2426 /* This message really ought to be max 23 lines.
75c72d73 2427 * Removed -h because the user already knows that option. Others? */
fb73857a 2428
27da23d5 2429 static const char * const usage_msg[] = {
fb73857a 2430"-0[octal] specify record separator (\\0, if no argument)",
f4ca673a 2431"-A[name] activate all/given assertions",
fb73857a 2432"-a autosplit mode with -n or -p (splits $_ into @F)",
fb3560ee 2433"-C[number/list] enables the listed Unicode features",
1950ee41 2434"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2435"-d[:debugger] run program under debugger",
2436"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
90490ea3 2437"-e program one line of program (several -e's allowed, omit programfile)",
f71cb6df 2438#ifdef USE_SITECUSTOMIZE
20ef40cf 2439"-f don't do $sitelib/sitecustomize.pl at startup",
f71cb6df 2440#endif
aac3bd0d
GS
2441"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2442"-i[extension] edit <> files in place (makes backup if extension supplied)",
2443"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2444"-l[octal] enable line ending processing, specifies line terminator",
a0288114
AL
2445"-[mM][-]module execute \"use/no module...\" before executing program",
2446"-n assume \"while (<>) { ... }\" loop around program",
aac3bd0d
GS
2447"-p assume loop like -n but print line also, like sed",
2448"-P run program through C preprocessor before compilation",
2449"-s enable rudimentary parsing for switches after programfile",
2450"-S look for programfile using PATH environment variable",
9cbc33e8 2451"-t enable tainting warnings",
90490ea3 2452"-T enable tainting checks",
aac3bd0d 2453"-u dump core after parsing program",
fb73857a 2454"-U allow unsafe operations",
aac3bd0d
GS
2455"-v print version, subversion (includes VERY IMPORTANT perl info)",
2456"-V[:variable] print configuration summary (or a single Config.pm variable)",
2457"-w enable many useful warnings (RECOMMENDED)",
3c0facb2 2458"-W enable all warnings",
fb73857a 2459"-x[directory] strip off text before #!perl line and perhaps cd to directory",
90490ea3 2460"-X disable all warnings",
fb73857a
PP
2461"\n",
2462NULL
2463};
27da23d5 2464 const char * const *p = usage_msg;
fb73857a 2465
b0e47665
GS
2466 PerlIO_printf(PerlIO_stdout(),
2467 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2468 name);
fb73857a 2469 while (*p)
b0e47665 2470 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2471}
2472
b4ab917c
DM
2473/* convert a string of -D options (or digits) into an int.
2474 * sets *s to point to the char after the options */
2475
2476#ifdef DEBUGGING
2477int
e1ec3a88 2478Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
b4ab917c 2479{
27da23d5 2480 static const char * const usage_msgd[] = {
e6e64d9b
JC
2481 " Debugging flag values: (see also -d)",
2482 " p Tokenizing and parsing (with v, displays parse stack)",
3679267a 2483 " s Stack snapshots (with v, displays all stacks)",
e6e64d9b
JC
2484 " l Context (loop) stack processing",
2485 " t Trace execution",
2486 " o Method and overloading resolution",
2487 " c String/numeric conversions",
2488 " P Print profiling info, preprocessor command for -P, source file input state",
2489 " m Memory allocation",
2490 " f Format processing",
2491 " r Regular expression parsing and execution",
2492 " x Syntax tree dump",
3679267a 2493 " u Tainting checks",
e6e64d9b
JC
2494 " H Hash dump -- usurps values()",
2495 " X Scratchpad allocation",
2496 " D Cleaning up",
2497 " S Thread synchronization",
2498 " T Tokenising",
2499 " R Include reference counts of dumped variables (eg when using -Ds)",
2500 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2501 " v Verbose: use in conjunction with other flags",
2502 " C Copy On Write",
2503 " A Consistency checks on internal structures",
3679267a 2504 " q quiet - currently only suppresses the 'EXECUTING' message",
e6e64d9b
JC
2505 NULL
2506 };
b4ab917c
DM
2507 int i = 0;
2508 if (isALPHA(**s)) {
2509 /* if adding extra options, remember to update DEBUG_MASK */
bfed75c6 2510 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
b4ab917c
DM
2511
2512 for (; isALNUM(**s); (*s)++) {
e1ec3a88 2513 const char *d = strchr(debopts,**s);
b4ab917c
DM
2514 if (d)
2515 i |= 1 << (d - debopts);
2516 else if (ckWARN_d(WARN_DEBUGGING))
e6e64d9b
JC
2517 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2518 "invalid option -D%c, use -D'' to see choices\n", **s);
b4ab917c
DM
2519 }
2520 }
e6e64d9b 2521 else if (isDIGIT(**s)) {
b4ab917c
DM
2522 i = atoi(*s);
2523 for (; isALNUM(**s); (*s)++) ;
2524 }
ddcf8bc1 2525 else if (givehelp) {
aadb217d 2526 char **p = (char **)usage_msgd;
e6e64d9b
JC
2527 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2528 }
b4ab917c
DM
2529# ifdef EBCDIC
2530 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2531 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2532 "-Dp not implemented on this platform\n");
2533# endif
2534 return i;
2535}
2536#endif
2537
79072805
LW
2538/* This routine handles any switches that can be given during run */
2539
2540char *
864dbfa3 2541Perl_moreswitches(pTHX_ char *s)
79072805 2542{
27da23d5 2543 dVAR;
84c133a0 2544 UV rschar;
79072805
LW
2545
2546 switch (*s) {
2547 case '0':
a863c7d1 2548 {
f2095865 2549 I32 flags = 0;
a3b680e6 2550 STRLEN numlen;
f2095865
JH
2551
2552 SvREFCNT_dec(PL_rs);
2553 if (s[1] == 'x' && s[2]) {
a3b680e6 2554 const char *e = s+=2;
f2095865
JH
2555 U8 *tmps;
2556
a3b680e6
AL
2557 while (*e)
2558 e++;
f2095865
JH
2559 numlen = e - s;
2560 flags = PERL_SCAN_SILENT_ILLDIGIT;
2561 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2562 if (s + numlen < e) {
2563 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2564 numlen = 0;
2565 s--;
2566 }
2567 PL_rs = newSVpvn("", 0);
c5661c80 2568 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
f2095865
JH
2569 tmps = (U8*)SvPVX(PL_rs);
2570 uvchr_to_utf8(tmps, rschar);
2571 SvCUR_set(PL_rs, UNISKIP(rschar));
2572 SvUTF8_on(PL_rs);
2573 }
2574 else {
2575 numlen = 4;
2576 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2577 if (rschar & ~((U8)~0))
2578 PL_rs = &PL_sv_undef;
2579 else if (!rschar && numlen >= 2)
2580 PL_rs = newSVpvn("", 0);
2581 else {
2582 char ch = (char)rschar;
2583 PL_rs = newSVpvn(&ch, 1);
2584 }
2585 }
800633c3 2586 sv_setsv(get_sv("/", TRUE), PL_rs);
f2095865 2587 return s + numlen;
a863c7d1 2588 }
46487f74 2589 case 'C':
a05d7ebb 2590 s++;
dd374669 2591 PL_unicode = parse_unicode_opts( (const char **)&s );
46487f74 2592 return s;
2304df62 2593 case 'F':
3280af22 2594 PL_minus_F = TRUE;
ebce5377
RGS
2595 PL_splitstr = ++s;
2596 while (*s && !isSPACE(*s)) ++s;
2597 *s = '\0';
2598 PL_splitstr = savepv(PL_splitstr);
2304df62 2599 return s;
79072805 2600 case 'a':
3280af22 2601 PL_minus_a = TRUE;
79072805
LW
2602 s++;
2603 return s;
2604 case 'c':
3280af22 2605 PL_minus_c = TRUE;
79072805
LW
2606 s++;
2607 return s;
2608 case 'd':
bbce6d69 2609 forbid_setid("-d");
4633a7c4 2610 s++;
2cbb2ee1
RGS
2611
2612 /* -dt indicates to the debugger that threads will be used */
2613 if (*s == 't' && !isALNUM(s[1])) {
2614 ++s;
2615 my_setenv("PERL5DB_THREADED", "1");
2616 }
2617
70c94a19
RR
2618 /* The following permits -d:Mod to accepts arguments following an =
2619 in the fashion that -MSome::Mod does. */
2620 if (*s == ':' || *s == '=') {
06b5626a 2621 const char *start;
70c94a19
RR
2622 SV *sv;
2623 sv = newSVpv("use Devel::", 0);
2624 start = ++s;
2625 /* We now allow -d:Module=Foo,Bar */
2626 while(isALNUM(*s) || *s==':') ++s;
2627 if (*s != '=')
2628 sv_catpv(sv, start);
2629 else {
2630 sv_catpvn(sv, start, s-start);
2631 sv_catpv(sv, " split(/,/,q{");
2632 sv_catpv(sv, ++s);
3d27e215 2633 sv_catpv(sv, "})");
70c94a19 2634 }
4633a7c4 2635 s += strlen(s);
70c94a19 2636 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2637 }
ed094faf 2638 if (!PL_perldb) {
3280af22 2639 PL_perldb = PERLDB_ALL;
a0d0e21e 2640 init_debugger();
ed094faf 2641 }
79072805
LW
2642 return s;
2643 case 'D':
0453d815 2644 {
79072805 2645#ifdef DEBUGGING
bbce6d69 2646 forbid_setid("-D");
b4ab917c 2647 s++;
dd374669 2648 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
12a43e32 2649#else /* !DEBUGGING */
0453d815 2650 if (ckWARN_d(WARN_DEBUGGING))
9014280d 2651 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
e6e64d9b 2652 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
a0d0e21e 2653 for (s++; isALNUM(*s); s++) ;
79072805
LW
2654#endif
2655 /*SUPPRESS 530*/
2656 return s;
0453d815 2657 }
4633a7c4 2658 case 'h':
ac27b0f5 2659 usage(PL_origargv[0]);
7ca617d0 2660 my_exit(0);
79072805 2661 case 'i':
3280af22
NIS
2662 if (PL_inplace)
2663 Safefree(PL_inplace);
c030f24b
GH
2664#if defined(__CYGWIN__) /* do backup extension automagically */
2665 if (*(s+1) == '\0') {
2666 PL_inplace = savepv(".bak");
2667 return s+1;
2668 }
2669#endif /* __CYGWIN__ */
3280af22 2670 PL_inplace = savepv(s+1);
79072805 2671 /*SUPPRESS 530*/
3280af22 2672 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2673 if (*s) {
fb73857a 2674 *s++ = '\0';
7b8d334a
GS
2675 if (*s == '-') /* Additional switches on #! line. */
2676 s++;
2677 }
fb73857a 2678 return s;
4e49a025 2679 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2680 forbid_setid("-I");
fb73857a
PP
2681 ++s;
2682 while (*s && isSPACE(*s))
2683 ++s;
2684 if (*s) {
774d564b 2685 char *e, *p;
0df16ed7
GS
2686 p = s;
2687 /* ignore trailing spaces (possibly followed by other switches) */
2688 do {
2689 for (e = p; *e && !isSPACE(*e); e++) ;
2690 p = e;
2691 while (isSPACE(*p))
2692 p++;
2693 } while (*p && *p != '-');
2694 e = savepvn(s, e-s);
88fe16b2 2695 incpush(e, TRUE, TRUE, FALSE, FALSE);
0df16ed7
GS
2696 Safefree(e);
2697 s = p;
2698 if (*s == '-')
2699 s++;
79072805
LW
2700 }
2701 else
a67e862a 2702 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2703 return s;
79072805 2704 case 'l':
3280af22 2705 PL_minus_l = TRUE;
79072805 2706 s++;
7889fe52
NIS
2707 if (PL_ors_sv) {
2708 SvREFCNT_dec(PL_ors_sv);
2709 PL_ors_sv = Nullsv;
2710 }
79072805 2711 if (isDIGIT(*s)) {
53305cf1 2712 I32 flags = 0;
a3b680e6 2713 STRLEN numlen;
7889fe52 2714 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2715 numlen = 3 + (*s == '0');
2716 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2717 s += numlen;
2718 }
2719 else {
8bfdd7d9 2720 if (RsPARA(PL_rs)) {
7889fe52
NIS
2721 PL_ors_sv = newSVpvn("\n\n",2);
2722 }
2723 else {
8bfdd7d9 2724 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2725 }
79072805
LW
2726 }
2727 return s;
06492da6
SF
2728 case 'A':
2729 forbid_setid("-A");
930366bd
RGS
2730 if (!PL_preambleav)
2731 PL_preambleav = newAV();
06492da6 2732 if (*++s) {
3d27e215
LM
2733 SV *sv = newSVpv("use assertions::activate split(/,/,q", 0);
2734 sv_catpvn(sv, "\0", 1); /* Use NUL as q//-delimiter. */
06492da6 2735 sv_catpv(sv,s);
3d27e215 2736 sv_catpvn(sv, "\0)", 2);
06492da6 2737 s+=strlen(s);
06492da6
SF
2738 av_push(PL_preambleav, sv);
2739 }
2740 else
930366bd 2741 av_push(PL_preambleav, newSVpvn("use assertions::activate",24));
06492da6 2742 return s;
1a30305b 2743 case 'M':
bbce6d69 2744 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2745 /* FALL THROUGH */
2746 case 'm':
bbce6d69 2747 forbid_setid("-m"); /* XXX ? */
1a30305b 2748 if (*++s) {
a5f75d66 2749 char *start;
11343788 2750 SV *sv;
e1ec3a88 2751 const char *use = "use ";
a5f75d66
AD
2752 /* -M-foo == 'no foo' */
2753 if (*s == '-') { use = "no "; ++s; }
11343788 2754 sv = newSVpv(use,0);
a5f75d66 2755 start = s;
1a30305b 2756 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2757 while(isALNUM(*s) || *s==':') ++s;
2758 if (*s != '=') {
11343788 2759 sv_catpv(sv, start);
c07a80fd
PP
2760 if (*(start-1) == 'm') {
2761 if (*s != '\0')
cea2e8a9 2762 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2763 sv_catpv( sv, " ()");
c07a80fd
PP
2764 }
2765 } else {
6df41af2 2766 if (s == start)
be98fb35
GS
2767 Perl_croak(aTHX_ "Module name required with -%c option",
2768 s[-1]);
11343788 2769 sv_catpvn(sv, start, s-start);
3d27e215
LM
2770 sv_catpv(sv, " split(/,/,q");
2771 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
11343788 2772 sv_catpv(sv, ++s);
3d27e215 2773 sv_catpvn(sv, "\0)", 2);
c07a80fd 2774 }
1a30305b 2775 s += strlen(s);
5c831c24 2776 if (!PL_preambleav)
3280af22
NIS
2777 PL_preambleav = newAV();
2778 av_push(PL_preambleav, sv);
1a30305b
PP
2779 }
2780 else
9e81e6a1 2781 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
1a30305b 2782 return s;
79072805 2783 case 'n':
3280af22 2784 PL_minus_n = TRUE;
79072805
LW
2785 s++;
2786 return s;
2787 case 'p':
3280af22 2788 PL_minus_p = TRUE;
79072805
LW
2789 s++;
2790 return s;
2791 case 's':
bbce6d69 2792 forbid_setid("-s");
3280af22 2793 PL_doswitches = TRUE;
79072805
LW
2794 s++;
2795 return s;
6537fe72
MS
2796 case 't':
2797 if (!PL_tainting)
22f7c9c9 2798 TOO_LATE_FOR('t');
6537fe72
MS
2799 s++;
2800 return s;
463ee0b2 2801 case 'T':
3280af22 2802 if (!PL_tainting)
22f7c9c9 2803 TOO_LATE_FOR('T');
463ee0b2
LW
2804 s++;
2805 return s;
79072805 2806 case 'u':
bf4acbe4
GS
2807#ifdef MACOS_TRADITIONAL
2808 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2809#endif
3280af22 2810 PL_do_undump = TRUE;
79072805
LW
2811 s++;
2812 return s;
2813 case 'U':
3280af22 2814 PL_unsafe = TRUE;
79072805
LW
2815 s++;
2816 return s;
2817 case 'v':
d7aa5382
JP
2818 if (!sv_derived_from(PL_patchlevel, "version"))
2819 (void *)upg_version(PL_patchlevel);
8e9464f1 2820#if !defined(DGUX)
b0e47665 2821 PerlIO_printf(PerlIO_stdout(),
014ead4b 2822 Perl_form(aTHX_ "\nThis is perl, v%"SVf" built for %s",
d7aa5382
JP
2823 vstringify(PL_patchlevel),
2824 ARCHNAME));
8e9464f1
JH
2825#else /* DGUX */
2826/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2827 PerlIO_printf(PerlIO_stdout(),
014ead4b 2828 Perl_form(aTHX_ "\nThis is perl, v%"SVf"\n",
d7aa5382 2829 vstringify(PL_patchlevel)));
8e9464f1
JH
2830 PerlIO_printf(PerlIO_stdout(),
2831 Perl_form(aTHX_ " built under %s at %s %s\n",
2832 OSNAME, __DATE__, __TIME__));
2833 PerlIO_printf(PerlIO_stdout(),
2834 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2835 OSVERS));
8e9464f1
JH
2836#endif /* !DGUX */
2837
fb73857a
PP
2838#if defined(LOCAL_PATCH_COUNT)
2839 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2840 PerlIO_printf(PerlIO_stdout(),
2841 "\n(with %d registered patch%s, "
2842 "see perl -V for more detail)",
2843 (int)LOCAL_PATCH_COUNT,
2844 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2845#endif
1a30305b 2846
b0e47665 2847 PerlIO_printf(PerlIO_stdout(),
359b00fe 2848 "\n\nCopyright 1987-2005, Larry Wall\n");
eae9c151
JH
2849#ifdef MACOS_TRADITIONAL
2850 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2851 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 2852 "maintained by Chris Nandor\n");
eae9c151 2853#endif
79072805 2854#ifdef MSDOS
b0e47665
GS
2855 PerlIO_printf(PerlIO_stdout(),
2856 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2857#endif
2858#ifdef DJGPP
b0e47665
GS
2859 PerlIO_printf(PerlIO_stdout(),
2860 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2861 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2862#endif
79072805 2863#ifdef OS2
b0e47665
GS
2864 PerlIO_printf(PerlIO_stdout(),
2865 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 2866 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2867#endif
79072805 2868#ifdef atarist
b0e47665
GS
2869 PerlIO_printf(PerlIO_stdout(),
2870 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2871#endif
a3f9223b 2872#ifdef __BEOS__
b0e47665
GS
2873 PerlIO_printf(PerlIO_stdout(),
2874 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2875#endif
1d84e8df 2876#ifdef MPE
b0e47665 2877 PerlIO_printf(PerlIO_stdout(),
e583a879 2878 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
1d84e8df 2879#endif
9d116dd7 2880#ifdef OEMVS
b0e47665
GS
2881 PerlIO_printf(PerlIO_stdout(),
2882 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2883#endif
495c5fdc 2884#ifdef __VOS__
b0e47665 2885 PerlIO_printf(PerlIO_stdout(),
94efb9fb 2886 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 2887#endif
092bebab 2888#ifdef __OPEN_VM
b0e47665
GS
2889 PerlIO_printf(PerlIO_stdout(),
2890 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2891#endif
a1a0e61e 2892#ifdef POSIX_BC
b0e47665
GS
2893 PerlIO_printf(PerlIO_stdout(),
2894 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2895#endif
61ae2fbf 2896#ifdef __MINT__
b0e47665
GS
2897 PerlIO_printf(PerlIO_stdout(),
2898 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2899#endif
f83d2536 2900#ifdef EPOC
b0e47665 2901 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2902 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 2903#endif
e1caacb4 2904#ifdef UNDER_CE
b475b3e6
JH
2905 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
2906 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
e1caacb4
JH
2907 wce_hitreturn();
2908#endif
27da23d5
JH
2909#ifdef SYMBIAN
2910 PerlIO_printf(PerlIO_stdout(),
2911 "Symbian port by Nokia, 2004-2005\n");
2912#endif
baed7233
DL
2913#ifdef BINARY_BUILD_NOTICE
2914 BINARY_BUILD_NOTICE;
2915#endif
b0e47665
GS
2916 PerlIO_printf(PerlIO_stdout(),
2917 "\n\
79072805 2918Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2919GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687 2920Complete documentation for Perl, including FAQ lists, should be found on\n\
a0288114 2921this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
c9e30dd8 2922Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
7ca617d0 2923 my_exit(0);
79072805 2924 case 'w':
599cee73 2925 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2926 PL_dowarn |= G_WARN_ON;
599cee73
PM
2927 s++;
2928 return s;
2929 case 'W':
ac27b0f5 2930 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS
2931 if (!specialWARN(PL_compiling.cop_warnings))
2932 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2933 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2934 s++;
2935 return s;
2936 case 'X':
ac27b0f5 2937 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS
2938 if (!specialWARN(PL_compiling.cop_warnings))
2939 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2940 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2941 s++;
2942 return s;
a0d0e21e 2943 case '*':
79072805
LW
2944 case ' ':
2945 if (s[1] == '-') /* Additional switches on #! line. */
2946 return s+2;
2947 break;
a0d0e21e 2948 case '-':
79072805 2949 case 0:
51882d45 2950#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2951 case '\r':
2952#endif
79072805
LW
2953 case '\n':
2954 case '\t':
2955 break;
aa689395
PP
2956#ifdef ALTERNATE_SHEBANG
2957 case 'S': /* OS/2 needs -S on "extproc" line. */
2958 break;
2959#endif
a0d0e21e 2960 case 'P':
3280af22 2961 if (PL_preprocess)
a0d0e21e
LW
2962 return s+1;
2963 /* FALL THROUGH */
79072805 2964 default:
cea2e8a9 2965 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2966 }
2967 return Nullch;
2968}
2969
2970/* compliments of Tom Christiansen */
2971
2972/* unexec() can be found in the Gnu emacs distribution */
ee580363 2973/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2974
2975void
864dbfa3 2976Perl_my_unexec(pTHX)
79072805
LW
2977{
2978#ifdef UNEXEC
46fc3d4c
PP
2979 SV* prog;
2980 SV* file;
ee580363 2981 int status = 1;
79072805
LW
2982 extern int etext;
2983
ee580363 2984 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2985 sv_catpv(prog, "/perl");
6b88bc9c 2986 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2987 sv_catpv(file, ".perldump");
79072805 2988
ee580363
GS
2989 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2990 /* unexec prints msg to stderr in case of failure */
6ad3d225 2991 PerlProc_exit(status);
79072805 2992#else
a5f75d66
AD
2993# ifdef VMS
2994# include <lib$routines.h>
2995 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 2996# else
79072805 2997 ABORT(); /* for use with undump */
aa689395 2998# endif
a5f75d66 2999#endif
79072805
LW
3000}
3001
cb68f92d
GS
3002/* initialize curinterp */
3003STATIC void
cea2e8a9 3004S_init_interp(pTHX)
cb68f92d
GS
3005{
3006
acfe0abc
GS
3007#ifdef MULTIPLICITY
3008# define PERLVAR(var,type)
3009# define PERLVARA(var,n,type)
3010# if defined(PERL_IMPLICIT_CONTEXT)
3011# if defined(USE_5005THREADS)
3012# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
27da23d5 3013# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
3014# else /* !USE_5005THREADS */
3015# define PERLVARI(var,type,init) aTHX->var = init;
3016# define PERLVARIC(var,type,init) aTHX->var = init;
3017# endif /* USE_5005THREADS */
3967c732 3018# else
acfe0abc
GS
3019# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3020# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 3021# endif
acfe0abc
GS
3022# include "intrpvar.h"
3023# ifndef USE_5005THREADS
3024# include "thrdvar.h"
3025# endif
3026# undef PERLVAR
3027# undef PERLVARA
3028# undef PERLVARI
3029# undef PERLVARIC
3030#else
3031# define PERLVAR(var,type)
3032# define PERLVARA(var,n,type)
3033# define PERLVARI(var,type,init) PL_##var = init;
3034# define PERLVARIC(var,type,init) PL_##var = init;
3035# include "intrpvar.h"
3036# ifndef USE_5005THREADS
3037# include "thrdvar.h"
3038# endif
3039# undef PERLVAR
3040# undef PERLVARA
3041# undef PERLVARI
3042# undef PERLVARIC
cb68f92d
GS
3043#endif
3044
cb68f92d
GS
3045}
3046
76e3520e 3047STATIC void
cea2e8a9 3048S_init_main_stash(pTHX)
79072805 3049{
463ee0b2 3050 GV *gv;
6e72f9df 3051
3280af22 3052 PL_curstash = PL_defstash = newHV();
79cb57f6 3053 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
3054 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3055 SvREFCNT_dec(GvHV(gv));
3280af22 3056 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 3057 SvREADONLY_on(gv);
bfcb3514 3058 Perl_hv_name_set(aTHX_ PL_defstash, "main", 4, 0);
3280af22
NIS
3059 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3060 GvMULTI_on(PL_incgv);
3061 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3062 GvMULTI_on(PL_hintgv);
3063 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3064 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3065 GvMULTI_on(PL_errgv);
3066 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3067 GvMULTI_on(PL_replgv);
cea2e8a9 3068 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
3069 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3070 sv_setpvn(ERRSV, "", 0);
3280af22 3071 PL_curstash = PL_defstash;
11faa288 3072 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 3073 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 3074 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 3075 /* We must init $/ before switches are processed. */
864dbfa3 3076 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
3077}
3078
ae3f3efd 3079/* PSz 18 Nov 03 fdscript now global but do not change prototype */
76e3520e 3080STATIC void
dd374669 3081S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
79072805 3082{
ae3f3efd 3083#ifndef IAMSUID
e1ec3a88
AL
3084 const char *quote;
3085 const char *code;
3086 const char *cpp_discard_flag;
3087 const char *perl;
ae3f3efd 3088#endif
27da23d5 3089 dVAR;
1b24ed4b 3090
ae3f3efd
PS
3091 PL_fdscript = -1;
3092 PL_suidscript = -1;
79072805 3093
3280af22 3094 if (PL_e_script) {
ff5bdd37 3095 PL_origfilename = savepvn("-e", 2);
96436eeb 3096 }
6c4ab083
GS
3097 else {
3098 /* if find_script() returns, it returns a malloc()-ed value */
dd374669 3099 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
3100
3101 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
e1ec3a88 3102 const char *s = scriptname + 8;
ae3f3efd 3103 PL_fdscript = atoi(s);
6c4ab083
GS
3104 while (isDIGIT(*s))
3105 s++;
3106 if (*s) {
ae3f3efd
PS
3107 /* PSz 18 Feb 04
3108 * Tell apart "normal" usage of fdscript, e.g.
3109 * with bash on FreeBSD:
3110 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3111 * from usage in suidperl.
3112 * Does any "normal" usage leave garbage after the number???
3113 * Is it a mistake to use a similar /dev/fd/ construct for
3114 * suidperl?
3115 */
3116 PL_suidscript = 1;
3117 /* PSz 20 Feb 04
3118 * Be supersafe and do some sanity-checks.
3119 * Still, can we be sure we got the right thing?
3120 */
3121 if (*s != '/') {
3122 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3123 }
3124 if (! *(s+1)) {
3125 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3126 }
6c4ab083 3127 scriptname = savepv(s + 1);
3280af22 3128 Safefree(PL_origfilename);
dd374669 3129 PL_origfilename = (char *)scriptname;
6c4ab083
GS
3130 }
3131 }
3132 }
3133
05ec9bb3 3134 CopFILE_free(PL_curcop);
57843af0 3135 CopFILE_set(PL_curcop, PL_origfilename);
770526c1 3136 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
dd374669 3137 scriptname = (char *)"";
ae3f3efd
PS
3138 if (PL_fdscript >= 0) {
3139 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS
3140# if defined(HAS_FCNTL) && defined(F_SETFD)
3141 if (PL_rsfp)
3142 /* ensure close-on-exec */
3143 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3144# endif
96436eeb 3145 }
ae3f3efd
PS
3146#ifdef IAMSUID
3147 else {
86207487
NC
3148 Perl_croak(aTHX_ "sperl needs fd script\n"
3149 "You should not call sperl directly; do you need to "
3150 "change a #! line\nfrom sperl to perl?\n");
3151
ae3f3efd
PS
3152/* PSz 11 Nov 03
3153 * Do not open (or do other fancy stuff) while setuid.
3154 * Perl does the open, and hands script to suidperl on a fd;
3155 * suidperl only does some checks, sets up UIDs and re-execs
3156 * perl with that fd as it has always done.
3157 */
3158 }
3159 if (PL_suidscript != 1) {
3160 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3161 }
3162#else /* IAMSUID */
3280af22 3163 else if (PL_preprocess) {
dd374669 3164 const char *cpp_cfg = CPPSTDIN;
79cb57f6 3165 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
3166 SV *cmd = NEWSV(0,0);
3167
ae58f265
JH
3168 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3169 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
46fc3d4c 3170 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 3171 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 3172 sv_catpv(cpp, cpp_cfg);
79072805 3173
1b24ed4b
MS
3174# ifndef VMS
3175 sv_catpvn(sv, "-I", 2);
3176 sv_catpv(sv,PRIVLIB_EXP);
3177# endif
46fc3d4c 3178
14953ddc
MB
3179 DEBUG_P(PerlIO_printf(Perl_debug_log,
3180 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3181 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS
3182
3183# if defined(MSDOS) || defined(WIN32) || defined(VMS)
3184 quote = "\"";
3185# else
3186 quote = "'";
3187# endif
3188
3189# ifdef VMS
3190 cpp_discard_flag = "";
3191# else
3192 cpp_discard_flag = "-C";
3193# endif
3194
3195# ifdef OS2
3196 perl = os2_execname(aTHX);
3197# else
3198 perl = PL_origargv[0];
3199# endif
3200
3201
3202 /* This strips off Perl comments which might interfere with
62375a60
NIS
3203 the C pre-processor, including #!. #line directives are
3204 deliberately stripped to avoid confusion with Perl's version
1b24ed4b
MS
3205 of #line. FWP played some golf with it so it will fit
3206 into VMS's 255 character buffer.
3207 */
3208 if( PL_doextract )
3209 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3210 else
3211 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3212
3213 Perl_sv_setpvf(aTHX_ cmd, "\
3214%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
62375a60 3215 perl, quote, code, quote, scriptname, cpp,
1b24ed4b
MS
3216 cpp_discard_flag, sv, CPPMINUS);
3217
3280af22 3218 PL_doextract = FALSE;
0a6c758d 3219
62375a60
NIS
3220 DEBUG_P(PerlIO_printf(Perl_debug_log,
3221 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS
3222 SvPVX(cmd)));
3223
dd374669 3224 PL_rsfp = PerlProc_popen(SvPVX(cmd), (char *)"r");
46fc3d4c
PP
3225 SvREFCNT_dec(cmd);
3226 SvREFCNT_dec(cpp);
79072805
LW
3227 }
3228 else if (!*scriptname) {
bbce6d69 3229 forbid_setid("program input from stdin");
3280af22 3230 PL_rsfp = PerlIO_stdin();
79072805 3231 }
96436eeb 3232 else {
3280af22 3233 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS
3234# if defined(HAS_FCNTL) && defined(F_SETFD)
3235 if (PL_rsfp)
3236 /* ensure close-on-exec */
3237 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3238# endif
96436eeb 3239 }
ae3f3efd 3240#endif /* IAMSUID */
3280af22 3241 if (!PL_rsfp) {
447218f8 3242 /* PSz 16 Sep 03 Keep neat error message */
fa3aa65a
JC
3243 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3244 CopFILE(PL_curcop), Strerror(errno));
13281fa4 3245 }
79072805 3246}
8d063cd8 3247
7b89560d
JH
3248/* Mention
3249 * I_SYSSTATVFS HAS_FSTATVFS
3250 * I_SYSMOUNT
c890dc6c 3251 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
3252 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3253 * here so that metaconfig picks them up. */
3254
104d25b7 3255#ifdef IAMSUID
864dbfa3 3256STATIC int
e688b231 3257S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 3258{
ae3f3efd
PS
3259/* PSz 27 Feb 04
3260 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3261 * but is needed also on machines without setreuid.
3262 * Seems safe enough to run as root.
3263 */
0545a864
JH
3264 int check_okay = 0; /* able to do all the required sys/libcalls */
3265 int on_nosuid = 0; /* the fd is on a nosuid fs */
ae3f3efd
PS
3266 /* PSz 12 Nov 03
3267 * Need to check noexec also: nosuid might not be set, the average
3268 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3269 */
3270 int on_noexec = 0; /* the fd is on a noexec fs */
3271
104d25b7 3272/*
ad27e871 3273 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 3274 * fstatvfs() is UNIX98.
0545a864 3275 * fstatfs() is 4.3 BSD.
ad27e871 3276 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
3277 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3278 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
3279 */
3280
6439433f
JH
3281#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3282
3283# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3284 defined(HAS_FSTATVFS)
3285# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 3286 struct statvfs stfs;
6439433f 3287
104d25b7
JH
3288 check_okay = fstatvfs(fd, &stfs) == 0;
3289 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
ae3f3efd
PS
3290#ifdef ST_NOEXEC
3291 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3292 on platforms where it is present. */
3293 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3294#endif
6439433f 3295# endif /* fstatvfs */
ac27b0f5 3296
6439433f
JH
3297# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3298 defined(PERL_MOUNT_NOSUID) && \
ae3f3efd 3299 defined(PERL_MOUNT_NOEXEC) && \
6439433f
JH
3300 defined(HAS_FSTATFS) && \
3301 defined(HAS_STRUCT_STATFS) && \
3302 defined(HAS_STRUCT_STATFS_F_FLAGS)
3303# define FD_ON_NOSUID_CHECK_OKAY
e688b231 3304 struct statfs stfs;
6439433f 3305
104d25b7 3306 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 3307 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
ae3f3efd 3308 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
6439433f
JH
3309# endif /* fstatfs */
3310
3311# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3312 defined(PERL_MOUNT_NOSUID) && \
ae3f3efd 3313 defined(PERL_MOUNT_NOEXEC) && \
6439433f
JH
3314 defined(HAS_FSTAT) && \
3315 defined(HAS_USTAT) && \
3316 defined(HAS_GETMNT) && \
3317 defined(HAS_STRUCT_FS_DATA) && \
3318 defined(NOSTAT_ONE)
3319# define FD_ON_NOSUID_CHECK_OKAY
c623ac67 3320 Stat_t fdst;
6439433f 3321
0545a864 3322 if (fstat(fd, &fdst) == 0) {
6439433f
JH
3323 struct ustat us;
3324 if (ustat(fdst.st_dev, &us) == 0) {
3325 struct fs_data fsd;
3326 /* NOSTAT_ONE here because we're not examining fields which
3327 * vary between that case and STAT_ONE. */
ad27e871 3328 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
3329 size_t cmplen = sizeof(us.f_fname);
3330 if (sizeof(fsd.fd_req.path) < cmplen)
3331 cmplen = sizeof(fsd.fd_req.path);
3332 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3333 fdst.st_dev == fsd.fd_req.dev) {
3334 check_okay = 1;
3335 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
ae3f3efd 3336 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
6439433f
JH
3337 }
3338 }
3339 }
3340 }
0545a864 3341 }
6439433f
JH
3342# endif /* fstat+ustat+getmnt */
3343
3344# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3345 defined(HAS_GETMNTENT) && \
3346 defined(HAS_HASMNTOPT) && \
ae3f3efd
PS
3347 defined(MNTOPT_NOSUID) && \
3348 defined(MNTOPT_NOEXEC)
6439433f
JH
3349# define FD_ON_NOSUID_CHECK_OKAY
3350 FILE *mtab = fopen("/etc/mtab", "r");
3351 struct mntent *entry;
c623ac67 3352 Stat_t stb, fsb;
104d25b7
JH
3353
3354 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
3355 while (entry = getmntent(mtab)) {
3356 if (stat(entry->mnt_dir, &fsb) == 0
3357 && fsb.st_dev == stb.st_dev)
3358 {
3359 /* found the filesystem */
3360 check_okay = 1;
3361 if (hasmntopt(entry, MNTOPT_NOSUID))
3362 on_nosuid = 1;
ae3f3efd
PS
3363 if (hasmntopt(entry, MNTOPT_NOEXEC))
3364 on_noexec = 1;
6439433f
JH
3365 break;
3366 } /* A single fs may well fail its stat(). */
3367 }
104d25b7
JH
3368 }
3369 if (mtab)
6439433f
JH
3370 fclose(mtab);
3371# endif /* getmntent+hasmntopt */
0545a864 3372
ac27b0f5 3373 if (!check_okay)
ae3f3efd
PS
3374 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3375 if (on_nosuid)
3376 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3377 if (on_noexec)
3378 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3379 return ((!check_okay) || on_nosuid || on_noexec);
104d25b7
JH
3380}
3381#endif /* IAMSUID */
3382
76e3520e 3383STATIC void
e1ec3a88 3384S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
79072805 3385{
27da23d5 3386 dVAR;
155aba94 3387#ifdef IAMSUID
ae3f3efd
PS
3388 /* int which; */
3389#endif /* IAMSUID */
96436eeb 3390
13281fa4
LW
3391 /* do we need to emulate setuid on scripts? */
3392
3393 /* This code is for those BSD systems that have setuid #! scripts disabled
3394 * in the kernel because of a security problem. Merely defining DOSUID
3395 * in perl will not fix that problem, but if you have disabled setuid
3396 * scripts in the kernel, this will attempt to emulate setuid and setgid
3397 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
3398 * root version must be called suidperl or sperlN.NNN. If regular perl
3399 * discovers that it has opened a setuid script, it calls suidperl with
3400 * the same argv that it had. If suidperl finds that the script it has
3401 * just opened is NOT setuid root, it sets the effective uid back to the
3402 * uid. We don't just make perl setuid root because that loses the
3403 * effective uid we had before invoking perl, if it was different from the
3404 * uid.
ae3f3efd
PS
3405 * PSz 27 Feb 04
3406 * Description/comments above do not match current workings:
3407 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3408 * suidperl called with script open and name changed to /dev/fd/N/X;
3409 * suidperl croaks if script is not setuid;
3410 * making perl setuid would be a huge security risk (and yes, that
3411 * would lose any euid we might have had).
13281fa4
LW
3412 *
3413 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3414 * be defined in suidperl only. suidperl must be setuid root. The
3415 * Configure script will set this up for you if you want it.
3416 */
a687059c 3417
13281fa4 3418#ifdef DOSUID
dd720ed5 3419 const char *s, *s2;
a0d0e21e 3420
b28d0864 3421 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 3422 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
ae3f3efd 3423 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 3424 I32 len;
dd720ed5 3425 const char *linestr;
13281fa4 3426
a687059c 3427#ifdef IAMSUID
ae3f3efd
PS
3428 if (PL_fdscript < 0 || PL_suidscript != 1)
3429 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3430 /* PSz 11 Nov 03
3431 * Since the script is opened by perl, not suidperl, some of these
3432 * checks are superfluous. Leaving them in probably does not lower
3433 * security(?!).
3434 */
3435 /* PSz 27 Feb 04
3436 * Do checks even for systems with no HAS_SETREUID.
3437 * We used to swap, then re-swap UIDs with
3438#ifdef HAS_SETREUID
3439 if (setreuid(PL_euid,PL_uid) < 0
3440 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3441 Perl_croak(aTHX_ "Can't swap uid and euid");
3442#endif
3443#ifdef HAS_SETREUID
3444 if (setreuid(PL_uid,PL_euid) < 0
3445 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3446 Perl_croak(aTHX_ "Can't reswap uid and euid");
3447#endif
3448 */
3449
a687059c
LW
3450 /* On this access check to make sure the directories are readable,
3451 * there is actually a small window that the user could use to make
3452 * filename point to an accessible directory. So there is a faint
3453 * chance that someone could execute a setuid script down in a
3454 * non-accessible directory. I don't know what to do about that.
3455 * But I don't think it's too important. The manual lies when
3456 * it says access() is useful in setuid programs.
ae3f3efd
PS
3457 *
3458 * So, access() is pretty useless... but not harmful... do anyway.
a687059c 3459 */
e57400b1 3460 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
ae3f3efd 3461 Perl_croak(aTHX_ "Can't access() script\n");
e57400b1 3462 }
ae3f3efd 3463
a687059c
LW
3464 /* If we can swap euid and uid, then we can determine access rights
3465 * with a simple stat of the file, and then compare device and
3466 * inode to make sure we did stat() on the same file we opened.
3467 * Then we just have to make sure he or she can execute it.
ae3f3efd
PS
3468 *
3469 * PSz 24 Feb 04
3470 * As the script is opened by perl, not suidperl, we do not need to
3471 * care much about access rights.
3472 *
3473 * The 'script changed' check is needed, or we can get lied to
3474 * about $0 with e.g.
3475 * suidperl /dev/fd/4//bin/x 4<setuidscript
3476 * Without HAS_SETREUID, is it safe to stat() as root?
3477 *
3478 * Are there any operating systems that pass /dev/fd/xxx for setuid
3479 * scripts, as suggested/described in perlsec(1)? Surely they do not
3480 * pass the script name as we do, so the "script changed" test would
3481 * fail for them... but we never get here with
3482 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3483 *
3484 * This is one place where we must "lie" about return status: not
3485 * say if the stat() failed. We are doing this as root, and could
3486 * be tricked into reporting existence or not of files that the
3487 * "plain" user cannot even see.
a687059c
LW
3488 */
3489 {
c623ac67 3490 Stat_t tmpstatbuf;
ae3f3efd
PS
3491 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3492 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
b28d0864 3493 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
ae3f3efd 3494 Perl_croak(aTHX_ "Setuid script changed\n");
a687059c 3495 }
ae3f3efd 3496
a687059c 3497 }
ae3f3efd
PS
3498 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3499 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3500
3501 /* PSz 27 Feb 04
3502 * We used to do this check as the "plain" user (after swapping
3503 * UIDs). But the check for nosuid and noexec filesystem is needed,
3504 * and should be done even without HAS_SETREUID. (Maybe those
3505 * operating systems do not have such mount options anyway...)
3506 * Seems safe enough to do as root.
3507 */
3508#if !defined(NO_NOSUID_CHECK)
3509 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3510 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3511 }
3512#endif
a687059c
LW
3513#endif /* IAMSUID */
3514
e57400b1 3515 if (!S_ISREG(PL_statbuf.st_mode)) {
ae3f3efd 3516 Perl_croak(aTHX_ "Setuid script not plain file\n");
e57400b1 3517 }
b28d0864 3518 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3519 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3520 PL_doswitches = FALSE; /* -s is insecure in suid */
ae3f3efd 3521 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
57843af0 3522 CopLINE_inc(PL_curcop);
dd720ed5 3523 linestr = SvPV_nolen_const(PL_linestr);
6b88bc9c 3524 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
dd720ed5 3525 strnNE(linestr,"#!",2) ) /* required even on Sys V */
cea2e8a9 3526 Perl_croak(aTHX_ "No #! line");
dd720ed5
NC
3527 linestr+=2;
3528 s = linestr;
ae3f3efd
PS
3529 /* PSz 27 Feb 04 */
3530 /* Sanity check on line length */
3531 if (strlen(s) < 1 || strlen(s) > 4000)
3532 Perl_croak(aTHX_ "Very long #! line");
3533 /* Allow more than a single space after #! */
3534 while (isSPACE(*s)) s++;
3535 /* Sanity check on buffer end */
3536 while ((*s) && !isSPACE(*s)) s++;
dd720ed5 3537 for (s2 = s; (s2 > linestr &&
3792a11b
NC
3538 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3539 || s2[-1] == '-')); s2--) ;
ae3f3efd 3540 /* Sanity check on buffer start */
dd720ed5
NC
3541 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3542 (s-9 < linestr || strnNE(s-9,"perl",4)) )
cea2e8a9 3543 Perl_croak(aTHX_ "Not a perl script");
a687059c 3544 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3545 /*
3546 * #! arg must be what we saw abov