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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 *
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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;
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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);
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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
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217 PL_linestr = NEWSV(65,79);
218 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 219
3280af22 220 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
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221 /* set read-only and try to insure than we wont see REFCNT==0
222 very often */
223
3280af22
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224 SvREADONLY_on(&PL_sv_undef);
225 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 226
3280af22 227 sv_setpv(&PL_sv_no,PL_No);
0309f36e
NC
228 /* value lookup in void context - happens to have the side effect
229 of caching the numeric forms. */
230 SvIV(&PL_sv_no);
3280af22
NIS
231 SvNV(&PL_sv_no);
232 SvREADONLY_on(&PL_sv_no);
233 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 234
3280af22 235 sv_setpv(&PL_sv_yes,PL_Yes);
0309f36e 236 SvIV(&PL_sv_yes);
3280af22
NIS
237 SvNV(&PL_sv_yes);
238 SvREADONLY_on(&PL_sv_yes);
239 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
7996736c
MHM
240
241 SvREADONLY_on(&PL_sv_placeholder);
242 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
6e72f9df 243 }
79072805 244
cea2e8a9 245 PL_sighandlerp = Perl_sighandler;
3280af22 246 PL_pidstatus = newHV();
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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
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272 PL_fdpid = newAV(); /* for remembering popen pids by fd */
273 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 274 PL_errors = newSVpvn("",0);
48c6b404 275 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
1f483ca1
JH
276 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
277 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
1fcf4c12 278#ifdef USE_ITHREADS
13137afc
AB
279 PL_regex_padav = newAV();
280 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
281 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 282#endif
e5dd39fc 283#ifdef USE_REENTRANT_API
59bd0823 284 Perl_reentrant_init(aTHX);
e5dd39fc 285#endif
3d47000e
AB
286
287 /* Note that strtab is a rather special HV. Assumptions are made
288 about not iterating on it, and not adding tie magic to it.
289 It is properly deallocated in perl_destruct() */
290 PL_strtab = newHV();
291
3d47000e
AB
292 HvSHAREKEYS_off(PL_strtab); /* mandatory */
293 hv_ksplit(PL_strtab, 512);
294
0631ea03
AB
295#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
296 _dyld_lookup_and_bind
297 ("__environ", (unsigned long *) &environ_pointer, NULL);
298#endif /* environ */
299
2f42fcb0
JH
300#ifndef PERL_MICRO
301# ifdef USE_ENVIRON_ARRAY
0631ea03 302 PL_origenviron = environ;
2f42fcb0 303# endif
0631ea03
AB
304#endif
305
5311654c 306 /* Use sysconf(_SC_CLK_TCK) if available, if not
dbc1d986 307 * available or if the sysconf() fails, use the HZ.
27da23d5
JH
308 * BeOS has those, but returns the wrong value.
309 * The HZ if not originally defined has been by now
310 * been defined as CLK_TCK, if available. */
dbc1d986 311#if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
5311654c
JH
312 PL_clocktick = sysconf(_SC_CLK_TCK);
313 if (PL_clocktick <= 0)
314#endif
315 PL_clocktick = HZ;
316
081fc587
AB
317 PL_stashcache = newHV();
318
d7aa5382
JP
319 PL_patchlevel = newSVpv(
320 Perl_form(aTHX_ "%d.%d.%d",
321 (int)PERL_REVISION,
322 (int)PERL_VERSION,
323 (int)PERL_SUBVERSION ), 0
324 );
325
27da23d5
JH
326#ifdef HAS_MMAP
327 if (!PL_mmap_page_size) {
328#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
329 {
330 SETERRNO(0, SS_NORMAL);
331# ifdef _SC_PAGESIZE
332 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
333# else
334 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
335# endif
336 if ((long) PL_mmap_page_size < 0) {
337 if (errno) {
338 SV *error = ERRSV;
339 char *msg;
340 STRLEN n_a;
341 (void) SvUPGRADE(error, SVt_PV);
342 msg = SvPVx(error, n_a);
343 Perl_croak(aTHX_ "panic: sysconf: %s", msg);
344 }
345 else
346 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
347 }
348 }
349#else
350# ifdef HAS_GETPAGESIZE
351 PL_mmap_page_size = getpagesize();
352# else
353# if defined(I_SYS_PARAM) && defined(PAGESIZE)
354 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
355# endif
356# endif
357#endif
358 if (PL_mmap_page_size <= 0)
359 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
360 (IV) PL_mmap_page_size);
361 }
362#endif /* HAS_MMAP */
363
364#if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
365 PL_timesbase.tms_utime = 0;
366 PL_timesbase.tms_stime = 0;
367 PL_timesbase.tms_cutime = 0;
368 PL_timesbase.tms_cstime = 0;
369#endif
370
8990e307 371 ENTER;
79072805
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372}
373
954c1994 374/*
62375a60
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375=for apidoc nothreadhook
376
377Stub that provides thread hook for perl_destruct when there are
378no threads.
379
380=cut
381*/
382
383int
4e9e3734 384Perl_nothreadhook(pTHX)
62375a60
NIS
385{
386 return 0;
387}
388
389/*
954c1994
GS
390=for apidoc perl_destruct
391
392Shuts down a Perl interpreter. See L<perlembed>.
393
394=cut
395*/
396
31d77e54 397int
0cb96387 398perl_destruct(pTHXx)
79072805 399{
27da23d5 400 dVAR;
7c474504 401 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 402 HV *hv;
8990e307 403
7766f137
GS
404 /* wait for all pseudo-forked children to finish */
405 PERL_WAIT_FOR_CHILDREN;
406
3280af22 407 destruct_level = PL_perl_destruct_level;
4633a7c4
LW
408#ifdef DEBUGGING
409 {
b7787f18 410 const char *s;
155aba94 411 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
e1ec3a88 412 const int i = atoi(s);
5f05dabc
PP
413 if (destruct_level < i)
414 destruct_level = i;
415 }
4633a7c4
LW
416 }
417#endif
418
27da23d5 419 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB
420 dJMPENV;
421 int x = 0;
422
423 JMPENV_PUSH(x);
424 if (PL_endav && !PL_minus_c)
425 call_list(PL_scopestack_ix, PL_endav);
426 JMPENV_POP;
26f423df 427 }
f3faeb53 428 LEAVE;
a0d0e21e
LW
429 FREETMPS;
430
e00b64d4 431 /* Need to flush since END blocks can produce output */
f13a2bc0 432 my_fflush_all();
e00b64d4 433
62375a60
NIS
434 if (CALL_FPTR(PL_threadhook)(aTHX)) {
435 /* Threads hook has vetoed further cleanup */
b47cad08 436 return STATUS_NATIVE_EXPORT;
62375a60
NIS
437 }
438
ff0cee69
PP
439 /* We must account for everything. */
440
441 /* Destroy the main CV and syntax tree */
3280af22 442 if (PL_main_root) {
4e380990
DM
443 /* ensure comppad/curpad to refer to main's pad */
444 if (CvPADLIST(PL_main_cv)) {
445 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
446 }
3280af22
NIS
447 op_free(PL_main_root);
448 PL_main_root = Nullop;
a0d0e21e 449 }
3280af22
NIS
450 PL_curcop = &PL_compiling;
451 PL_main_start = Nullop;
452 SvREFCNT_dec(PL_main_cv);
453 PL_main_cv = Nullcv;
24d3c518 454 PL_dirty = TRUE;
ff0cee69 455
13621cfb
NIS
456 /* Tell PerlIO we are about to tear things apart in case
457 we have layers which are using resources that should
458 be cleaned up now.
459 */
460
461 PerlIO_destruct(aTHX);
462
3280af22 463 if (PL_sv_objcount) {
a0d0e21e
LW
464 /*
465 * Try to destruct global references. We do this first so that the
466 * destructors and destructees still exist. Some sv's might remain.
467 * Non-referenced objects are on their own.
468 */
a0d0e21e 469 sv_clean_objs();
bf9cdc68 470 PL_sv_objcount = 0;
8990e307
LW
471 }
472
5cd24f17 473 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
474 SvREFCNT_dec(PL_warnhook);
475 PL_warnhook = Nullsv;
476 SvREFCNT_dec(PL_diehook);
477 PL_diehook = Nullsv;
5cd24f17 478
4b556e6c 479 /* call exit list functions */
3280af22 480 while (PL_exitlistlen-- > 0)
acfe0abc 481 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 482
3280af22 483 Safefree(PL_exitlist);
4b556e6c 484
1c4916e5
CB
485 PL_exitlist = NULL;
486 PL_exitlistlen = 0;
487
a0d0e21e 488 if (destruct_level == 0){
8990e307 489
a0d0e21e 490 DEBUG_P(debprofdump());
ac27b0f5 491
56a2bab7
NIS
492#if defined(PERLIO_LAYERS)
493 /* No more IO - including error messages ! */
494 PerlIO_cleanup(aTHX);
495#endif
496
a0d0e21e 497 /* The exit() function will do everything that needs doing. */
b47cad08 498 return STATUS_NATIVE_EXPORT;
a0d0e21e 499 }
5dd60ef7 500
551a8b83 501 /* jettison our possibly duplicated environment */
4b647fb0
DM
502 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
503 * so we certainly shouldn't free it here
504 */
2f42fcb0 505#ifndef PERL_MICRO
4b647fb0 506#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
50acdf95 507 if (environ != PL_origenviron && !PL_use_safe_putenv
4efc5df6
GS
508#ifdef USE_ITHREADS
509 /* only main thread can free environ[0] contents */
510 && PL_curinterp == aTHX
511#endif
512 )
513 {
551a8b83
JH
514 I32 i;
515
516 for (i = 0; environ[i]; i++)
4b420006 517 safesysfree(environ[i]);
0631ea03 518
4b420006
JH
519 /* Must use safesysfree() when working with environ. */
520 safesysfree(environ);
551a8b83
JH
521
522 environ = PL_origenviron;
523 }
524#endif
2f42fcb0 525#endif /* !PERL_MICRO */
551a8b83 526
804ffa60
DM
527 /* reset so print() ends up where we expect */
528 setdefout(Nullgv);
529
5f8cb046
DM
530#ifdef USE_ITHREADS
531 /* the syntax tree is shared between clones
532 * so op_free(PL_main_root) only ReREFCNT_dec's
533 * REGEXPs in the parent interpreter
534 * we need to manually ReREFCNT_dec for the clones
535 */
536 {
537 I32 i = AvFILLp(PL_regex_padav) + 1;
538 SV **ary = AvARRAY(PL_regex_padav);
539
540 while (i) {
35061a7e 541 SV *resv = ary[--i];
35061a7e
DM
542
543 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 544 /* this is PL_reg_curpm, already freed
35061a7e
DM
545 * flag is set in regexec.c:S_regtry
546 */
547 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 548 }
1cc8b4c5
AB
549 else if(SvREPADTMP(resv)) {
550 SvREPADTMP_off(resv);
551 }
a560f29b
NC
552 else if(SvIOKp(resv)) {
553 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
5f8cb046
DM
554 ReREFCNT_dec(re);
555 }
556 }
557 }
558 SvREFCNT_dec(PL_regex_padav);
559 PL_regex_padav = Nullav;
560 PL_regex_pad = NULL;
561#endif
562
081fc587
AB
563 SvREFCNT_dec((SV*) PL_stashcache);
564 PL_stashcache = NULL;
565
5f05dabc
PP
566 /* loosen bonds of global variables */
567
3280af22
NIS
568 if(PL_rsfp) {
569 (void)PerlIO_close(PL_rsfp);
570 PL_rsfp = Nullfp;
8ebc5c01
PP
571 }
572
573 /* Filters for program text */
3280af22
NIS
574 SvREFCNT_dec(PL_rsfp_filters);
575 PL_rsfp_filters = Nullav;
8ebc5c01
PP
576
577 /* switches */
3280af22
NIS
578 PL_preprocess = FALSE;
579 PL_minus_n = FALSE;
580 PL_minus_p = FALSE;
581 PL_minus_l = FALSE;
582 PL_minus_a = FALSE;
583 PL_minus_F = FALSE;
584 PL_doswitches = FALSE;
599cee73 585 PL_dowarn = G_WARN_OFF;
3280af22
NIS
586 PL_doextract = FALSE;
587 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
588 PL_unsafe = FALSE;
589
590 Safefree(PL_inplace);
591 PL_inplace = Nullch;
a7cb1f99 592 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
593
594 if (PL_e_script) {
595 SvREFCNT_dec(PL_e_script);
596 PL_e_script = Nullsv;
8ebc5c01
PP
597 }
598
bf9cdc68
RG
599 PL_perldb = 0;
600
8ebc5c01
PP
601 /* magical thingies */
602
7889fe52
NIS
603 SvREFCNT_dec(PL_ofs_sv); /* $, */
604 PL_ofs_sv = Nullsv;
5f05dabc 605
7889fe52
NIS
606 SvREFCNT_dec(PL_ors_sv); /* $\ */
607 PL_ors_sv = Nullsv;
8ebc5c01 608
3280af22
NIS
609 SvREFCNT_dec(PL_rs); /* $/ */
610 PL_rs = Nullsv;
dc92893f 611
d33b2eba
GS
612 PL_multiline = 0; /* $* */
613 Safefree(PL_osname); /* $^O */
614 PL_osname = Nullch;
5f05dabc 615
3280af22
NIS
616 SvREFCNT_dec(PL_statname);
617 PL_statname = Nullsv;
618 PL_statgv = Nullgv;
5f05dabc 619
8ebc5c01
PP
620 /* defgv, aka *_ should be taken care of elsewhere */
621
8ebc5c01 622 /* clean up after study() */
3280af22
NIS
623 SvREFCNT_dec(PL_lastscream);
624 PL_lastscream = Nullsv;
625 Safefree(PL_screamfirst);
626 PL_screamfirst = 0;
627 Safefree(PL_screamnext);
628 PL_screamnext = 0;
8ebc5c01 629
7d5ea4e7
GS
630 /* float buffer */
631 Safefree(PL_efloatbuf);
632 PL_efloatbuf = Nullch;
633 PL_efloatsize = 0;
634
8ebc5c01 635 /* startup and shutdown function lists */
3280af22 636 SvREFCNT_dec(PL_beginav);
5a837c8f 637 SvREFCNT_dec(PL_beginav_save);
3280af22 638 SvREFCNT_dec(PL_endav);
7d30b5c4 639 SvREFCNT_dec(PL_checkav);
ece599bd 640 SvREFCNT_dec(PL_checkav_save);
3280af22
NIS
641 SvREFCNT_dec(PL_initav);
642 PL_beginav = Nullav;
5a837c8f 643 PL_beginav_save = Nullav;
3280af22 644 PL_endav = Nullav;
7d30b5c4 645 PL_checkav = Nullav;
ece599bd 646 PL_checkav_save = Nullav;
3280af22 647 PL_initav = Nullav;
5618dfe8 648
8ebc5c01 649 /* shortcuts just get cleared */
3280af22 650 PL_envgv = Nullgv;
3280af22
NIS
651 PL_incgv = Nullgv;
652 PL_hintgv = Nullgv;
653 PL_errgv = Nullgv;
654 PL_argvgv = Nullgv;
655 PL_argvoutgv = Nullgv;
656 PL_stdingv = Nullgv;
bf49b057 657 PL_stderrgv = Nullgv;
3280af22
NIS
658 PL_last_in_gv = Nullgv;
659 PL_replgv = Nullgv;
bf9cdc68
RG
660 PL_DBgv = Nullgv;
661 PL_DBline = Nullgv;
662 PL_DBsub = Nullgv;
663 PL_DBsingle = Nullsv;
664 PL_DBtrace = Nullsv;
665 PL_DBsignal = Nullsv;
666 PL_DBassertion = Nullsv;
667 PL_DBcv = Nullcv;
668 PL_dbargs = Nullav;
5c831c24 669 PL_debstash = Nullhv;
8ebc5c01 670
7a1c5554
GS
671 SvREFCNT_dec(PL_argvout_stack);
672 PL_argvout_stack = Nullav;
8ebc5c01 673
5c831c24
GS
674 SvREFCNT_dec(PL_modglobal);
675 PL_modglobal = Nullhv;
676 SvREFCNT_dec(PL_preambleav);
677 PL_preambleav = Nullav;
678 SvREFCNT_dec(PL_subname);
679 PL_subname = Nullsv;
680 SvREFCNT_dec(PL_linestr);
681 PL_linestr = Nullsv;
682 SvREFCNT_dec(PL_pidstatus);
683 PL_pidstatus = Nullhv;
684 SvREFCNT_dec(PL_toptarget);
685 PL_toptarget = Nullsv;
686 SvREFCNT_dec(PL_bodytarget);
687 PL_bodytarget = Nullsv;
688 PL_formtarget = Nullsv;
689
d33b2eba 690 /* free locale stuff */
b9582b6a 691#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
692 Safefree(PL_collation_name);
693 PL_collation_name = Nullch;
b9582b6a 694#endif
d33b2eba 695
b9582b6a 696#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
697 Safefree(PL_numeric_name);
698 PL_numeric_name = Nullch;
a453c169 699 SvREFCNT_dec(PL_numeric_radix_sv);
bf9cdc68 700 PL_numeric_radix_sv = Nullsv;
b9582b6a 701#endif
d33b2eba 702
5c831c24
GS
703 /* clear utf8 character classes */
704 SvREFCNT_dec(PL_utf8_alnum);
705 SvREFCNT_dec(PL_utf8_alnumc);
706 SvREFCNT_dec(PL_utf8_ascii);
707 SvREFCNT_dec(PL_utf8_alpha);
708 SvREFCNT_dec(PL_utf8_space);
709 SvREFCNT_dec(PL_utf8_cntrl);
710 SvREFCNT_dec(PL_utf8_graph);
711 SvREFCNT_dec(PL_utf8_digit);
712 SvREFCNT_dec(PL_utf8_upper);
713 SvREFCNT_dec(PL_utf8_lower);
714 SvREFCNT_dec(PL_utf8_print);
715 SvREFCNT_dec(PL_utf8_punct);
716 SvREFCNT_dec(PL_utf8_xdigit);
717 SvREFCNT_dec(PL_utf8_mark);
718 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 719 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 720 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 721 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH
722 SvREFCNT_dec(PL_utf8_idstart);
723 SvREFCNT_dec(PL_utf8_idcont);
5c831c24
GS
724 PL_utf8_alnum = Nullsv;
725 PL_utf8_alnumc = Nullsv;
726 PL_utf8_ascii = Nullsv;
727 PL_utf8_alpha = Nullsv;
728 PL_utf8_space = Nullsv;
729 PL_utf8_cntrl = Nullsv;
730 PL_utf8_graph = Nullsv;
731 PL_utf8_digit = Nullsv;
732 PL_utf8_upper = Nullsv;
733 PL_utf8_lower = Nullsv;
734 PL_utf8_print = Nullsv;
735 PL_utf8_punct = Nullsv;
736 PL_utf8_xdigit = Nullsv;
737 PL_utf8_mark = Nullsv;
738 PL_utf8_toupper = Nullsv;
739 PL_utf8_totitle = Nullsv;
740 PL_utf8_tolower = Nullsv;
b4e400f9 741 PL_utf8_tofold = Nullsv;
82686b01
JH
742 PL_utf8_idstart = Nullsv;
743 PL_utf8_idcont = Nullsv;
5c831c24 744
971a9dd3
GS
745 if (!specialWARN(PL_compiling.cop_warnings))
746 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 747 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
748 if (!specialCopIO(PL_compiling.cop_io))
749 SvREFCNT_dec(PL_compiling.cop_io);
750 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS
751 CopFILE_free(&PL_compiling);
752 CopSTASH_free(&PL_compiling);
5c831c24 753
a0d0e21e 754 /* Prepare to destruct main symbol table. */
5f05dabc 755
3280af22
NIS
756 hv = PL_defstash;
757 PL_defstash = 0;
a0d0e21e 758 SvREFCNT_dec(hv);
5c831c24
GS
759 SvREFCNT_dec(PL_curstname);
760 PL_curstname = Nullsv;
a0d0e21e 761
5a844595
GS
762 /* clear queued errors */
763 SvREFCNT_dec(PL_errors);
764 PL_errors = Nullsv;
765
a0d0e21e 766 FREETMPS;
0453d815 767 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 768 if (PL_scopestack_ix != 0)
9014280d 769 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 770 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
771 (long)PL_scopestack_ix);
772 if (PL_savestack_ix != 0)
9014280d 773 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 774 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
775 (long)PL_savestack_ix);
776 if (PL_tmps_floor != -1)
9014280d 777 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 778 (long)PL_tmps_floor + 1);
a0d0e21e 779 if (cxstack_ix != -1)
9014280d 780 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 781 (long)cxstack_ix + 1);
a0d0e21e 782 }
8990e307
LW
783
784 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 785 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 786 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
787
788 /* the 2 is for PL_fdpid and PL_strtab */
789 while (PL_sv_count > 2 && sv_clean_all())
790 ;
791
d33b2eba
GS
792 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
793 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
794 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
795 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 796
d4777f27
GS
797 AvREAL_off(PL_fdpid); /* no surviving entries */
798 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
799 PL_fdpid = Nullav;
800
6c644e78
GS
801#ifdef HAVE_INTERP_INTERN
802 sys_intern_clear();
803#endif
804
6e72f9df
PP
805 /* Destruct the global string table. */
806 {
807 /* Yell and reset the HeVAL() slots that are still holding refcounts,
808 * so that sv_free() won't fail on them.
809 */
810 I32 riter;
811 I32 max;
812 HE *hent;
813 HE **array;
814
815 riter = 0;
3280af22
NIS
816 max = HvMAX(PL_strtab);
817 array = HvARRAY(PL_strtab);
6e72f9df
PP
818 hent = array[0];
819 for (;;) {
0453d815 820 if (hent && ckWARN_d(WARN_INTERNAL)) {
9014280d 821 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 822 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
823 HeVAL(hent) - Nullsv, HeKEY(hent));
824 HeVAL(hent) = Nullsv;
825 hent = HeNEXT(hent);
826 }
827 if (!hent) {
828 if (++riter > max)
829 break;
830 hent = array[riter];
831 }
832 }
833 }
3280af22 834 SvREFCNT_dec(PL_strtab);
6e72f9df 835
e652bb2f 836#ifdef USE_ITHREADS
c21d1a0f 837 /* free the pointer tables used for cloning */
a0739874 838 ptr_table_free(PL_ptr_table);
bf9cdc68 839 PL_ptr_table = (PTR_TBL_t*)NULL;
c21d1a0f
NC
840 ptr_table_free(PL_shared_hek_table);
841 PL_shared_hek_table = (PTR_TBL_t*)NULL;
53186e96 842#endif
a0739874 843
d33b2eba
GS
844 /* free special SVs */
845
846 SvREFCNT(&PL_sv_yes) = 0;
847 sv_clear(&PL_sv_yes);
848 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 849 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
850
851 SvREFCNT(&PL_sv_no) = 0;
852 sv_clear(&PL_sv_no);
853 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 854 SvFLAGS(&PL_sv_no) = 0;
01724ea0 855
9f375a43
DM
856 {
857 int i;
858 for (i=0; i<=2; i++) {
859 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
860 sv_clear(PERL_DEBUG_PAD(i));
861 SvANY(PERL_DEBUG_PAD(i)) = NULL;
862 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
863 }
864 }
865
0453d815 866 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 867 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 868
eba0f806
DM
869#ifdef DEBUG_LEAKING_SCALARS
870 if (PL_sv_count != 0) {
871 SV* sva;
872 SV* sv;
873 register SV* svend;
874
875 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
876 svend = &sva[SvREFCNT(sva)];
877 for (sv = sva + 1; sv < svend; ++sv) {
878 if (SvTYPE(sv) != SVTYPEMASK) {
a548cda8 879 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
61b61456 880 " flags=0x%"UVxf
fd0854ff
DM
881 " refcnt=%"UVuf pTHX__FORMAT "\n"
882 "\tallocated at %s:%d %s %s%s\n",
883 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
884 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
885 sv->sv_debug_line,
886 sv->sv_debug_inpad ? "for" : "by",
887 sv->sv_debug_optype ?
888 PL_op_name[sv->sv_debug_optype]: "(none)",
889 sv->sv_debug_cloned ? " (cloned)" : ""
890 );
eba0f806
DM
891 }
892 }
893 }
894 }
895#endif
bf9cdc68 896 PL_sv_count = 0;
eba0f806
DM
897
898
56a2bab7 899#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
900 /* No more IO - including error messages ! */
901 PerlIO_cleanup(aTHX);
902#endif
903
9f4bd222
NIS
904 /* sv_undef needs to stay immortal until after PerlIO_cleanup
905 as currently layers use it rather than Nullsv as a marker
906 for no arg - and will try and SvREFCNT_dec it.
907 */
908 SvREFCNT(&PL_sv_undef) = 0;
909 SvREADONLY_off(&PL_sv_undef);
910
3280af22 911 Safefree(PL_origfilename);
bf9cdc68 912 PL_origfilename = Nullch;
3280af22 913 Safefree(PL_reg_start_tmp);
bf9cdc68
RG
914 PL_reg_start_tmp = (char**)NULL;
915 PL_reg_start_tmpl = 0;
5c5e4c24
IZ
916 if (PL_reg_curpm)
917 Safefree(PL_reg_curpm);
82ba1be6 918 Safefree(PL_reg_poscache);
dd28f7bb 919 free_tied_hv_pool();
3280af22 920 Safefree(PL_op_mask);
cf36064f 921 Safefree(PL_psig_ptr);
bf9cdc68 922 PL_psig_ptr = (SV**)NULL;
cf36064f 923 Safefree(PL_psig_name);
bf9cdc68 924 PL_psig_name = (SV**)NULL;
2c2666fc 925 Safefree(PL_bitcount);
bf9cdc68 926 PL_bitcount = Nullch;
ce08f86c 927 Safefree(PL_psig_pend);
bf9cdc68
RG
928 PL_psig_pend = (int*)NULL;
929 PL_formfeed = Nullsv;
930 Safefree(PL_ofmt);
931 PL_ofmt = Nullch;
6e72f9df 932 nuke_stacks();
bf9cdc68
RG
933 PL_tainting = FALSE;
934 PL_taint_warn = FALSE;
3280af22 935 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
bf9cdc68 936 PL_debug = 0;
ac27b0f5 937
a0d0e21e 938 DEBUG_P(debprofdump());
d33b2eba 939
e5dd39fc 940#ifdef USE_REENTRANT_API
10bc17b6 941 Perl_reentrant_free(aTHX);
e5dd39fc
AB
942#endif
943
612f20c3
GS
944 sv_free_arenas();
945
fc36a67e
PP
946 /* As the absolutely last thing, free the non-arena SV for mess() */
947
3280af22 948 if (PL_mess_sv) {
f350b448
NC
949 /* we know that type == SVt_PVMG */
950
9c63abab 951 /* it could have accumulated taint magic */
f350b448
NC
952 MAGIC* mg;
953 MAGIC* moremagic;
954 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
955 moremagic = mg->mg_moremagic;
956 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
957 && mg->mg_len >= 0)
958 Safefree(mg->mg_ptr);
959 Safefree(mg);
9c63abab 960 }
f350b448 961
fc36a67e 962 /* we know that type >= SVt_PV */
8bd4d4c5 963 SvPV_free(PL_mess_sv);
3280af22
NIS
964 Safefree(SvANY(PL_mess_sv));
965 Safefree(PL_mess_sv);
966 PL_mess_sv = Nullsv;
fc36a67e 967 }
31d77e54 968 return STATUS_NATIVE_EXPORT;
79072805
LW
969}
970
954c1994
GS
971/*
972=for apidoc perl_free
973
974Releases a Perl interpreter. See L<perlembed>.
975
976=cut
977*/
978
79072805 979void
0cb96387 980perl_free(pTHXx)
79072805 981{
acfe0abc 982#if defined(WIN32) || defined(NETWARE)
ce3e5b80 983# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
984# ifdef NETWARE
985 void *host = nw_internal_host;
986# else
987 void *host = w32_internal_host;
988# endif
ce3e5b80 989 PerlMem_free(aTHXx);
acfe0abc 990# ifdef NETWARE
011f1a1a 991 nw_delete_internal_host(host);
acfe0abc
GS
992# else
993 win32_delete_internal_host(host);
994# endif
1c0ca838
GS
995# else
996 PerlMem_free(aTHXx);
997# endif
acfe0abc
GS
998#else
999 PerlMem_free(aTHXx);
76e3520e 1000#endif
79072805
LW
1001}
1002
aebd1ac7
GA
1003#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1004/* provide destructors to clean up the thread key when libperl is unloaded */
1005#ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1006
110d3f98 1007#if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
aebd1ac7
GA
1008#pragma fini "perl_fini"
1009#endif
1010
0dbb1585
AL
1011static void
1012#if defined(__GNUC__)
1013__attribute__((destructor))
aebd1ac7 1014#endif
de009b76 1015perl_fini(void)
aebd1ac7 1016{
27da23d5 1017 dVAR;
aebd1ac7
GA
1018 if (PL_curinterp)
1019 FREE_THREAD_KEY;
1020}
1021
1022#endif /* WIN32 */
1023#endif /* THREADS */
1024
4b556e6c 1025void
864dbfa3 1026Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 1027{
3280af22
NIS
1028 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1029 PL_exitlist[PL_exitlistlen].fn = fn;
1030 PL_exitlist[PL_exitlistlen].ptr = ptr;
1031 ++PL_exitlistlen;
4b556e6c
JD
1032}
1033
56cf6df8
RGS
1034#ifdef HAS_PROCSELFEXE
1035/* This is a function so that we don't hold on to MAXPATHLEN
1036 bytes of stack longer than necessary
1037 */
1038STATIC void
e1ec3a88 1039S_procself_val(pTHX_ SV *sv, const char *arg0)
56cf6df8
RGS
1040{
1041 char buf[MAXPATHLEN];
1042 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1043
1044 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1045 includes a spurious NUL which will cause $^X to fail in system
1046 or backticks (this will prevent extensions from being built and
1047 many tests from working). readlink is not meant to add a NUL.
1048 Normal readlink works fine.
1049 */
1050 if (len > 0 && buf[len-1] == '\0') {
1051 len--;
1052 }
1053
1054 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1055 returning the text "unknown" from the readlink rather than the path
1056 to the executable (or returning an error from the readlink). Any valid
1057 path has a '/' in it somewhere, so use that to validate the result.
1058 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1059 */
1060 if (len > 0 && memchr(buf, '/', len)) {
1061 sv_setpvn(sv,buf,len);
1062 }
1063 else {
1064 sv_setpv(sv,arg0);
1065 }
1066}
1067#endif /* HAS_PROCSELFEXE */
b7975bdd
NC
1068
1069STATIC void
1070S_set_caret_X(pTHX) {
1071 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1072 if (tmpgv) {
1073#ifdef HAS_PROCSELFEXE
1074 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1075#else
1076#ifdef OS2
1077 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
1078#else
1079 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
1080#endif
1081#endif
1082 }
1083}
1084
954c1994
GS
1085/*
1086=for apidoc perl_parse
1087
1088Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1089
1090=cut
1091*/
1092
79072805 1093int
0cb96387 1094perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 1095{
27da23d5 1096 dVAR;
6224f72b 1097 I32 oldscope;
6224f72b 1098 int ret;
db36c5a1 1099 dJMPENV;
8d063cd8 1100
a687059c
LW
1101#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1102#ifdef IAMSUID
1103#undef IAMSUID
cea2e8a9 1104 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c 1105setuid perl scripts securely.\n");
ae3f3efd 1106#endif /* IAMSUID */
a687059c
LW
1107#endif
1108
b0891165
JH
1109#if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1110 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
103dd899 1111 * This MUST be done before any hash stores or fetches take place.
008fb0c0
NC
1112 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1113 * yourself, it is your responsibility to provide a good random seed!
830b38bd 1114 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
008fb0c0
NC
1115 if (!PL_rehash_seed_set)
1116 PL_rehash_seed = get_hash_seed();
b0891165 1117 {
bed60192
JH
1118 char *s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1119
1120 if (s) {
1121 int i = atoi(s);
1122
1123 if (i == 1)
1124 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n",
008fb0c0 1125 PL_rehash_seed);
bed60192 1126 }
b0891165
JH
1127 }
1128#endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1129
3280af22 1130 PL_origargc = argc;
e2975953 1131 PL_origargv = argv;
a0d0e21e 1132
54bfe034 1133 {
3cb9023d
JH
1134 /* Set PL_origalen be the sum of the contiguous argv[]
1135 * elements plus the size of the env in case that it is
e9137a8e 1136 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
3cb9023d
JH
1137 * as the maximum modifiable length of $0. In the worst case
1138 * the area we are able to modify is limited to the size of
43c32782 1139 * the original argv[0]. (See below for 'contiguous', though.)
3cb9023d 1140 * --jhi */
e1ec3a88 1141 const char *s = NULL;
54bfe034 1142 int i;
7d8e7db3
JH
1143 UV mask =
1144 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
43c32782
JH
1145 /* Do the mask check only if the args seem like aligned. */
1146 UV aligned =
1147 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1148
1149 /* See if all the arguments are contiguous in memory. Note
1150 * that 'contiguous' is a loose term because some platforms
1151 * align the argv[] and the envp[]. If the arguments look
1152 * like non-aligned, assume that they are 'strictly' or
1153 * 'traditionally' contiguous. If the arguments look like
1154 * aligned, we just check that they are within aligned
1155 * PTRSIZE bytes. As long as no system has something bizarre
1156 * like the argv[] interleaved with some other data, we are
1157 * fine. (Did I just evoke Murphy's Law?) --jhi */
c8941eeb
JH
1158 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1159 while (*s) s++;
1160 for (i = 1; i < PL_origargc; i++) {
1161 if ((PL_origargv[i] == s + 1
43c32782 1162#ifdef OS2
c8941eeb 1163 || PL_origargv[i] == s + 2
43c32782 1164#endif
c8941eeb
JH
1165 )
1166 ||
1167 (aligned &&
1168 (PL_origargv[i] > s &&
1169 PL_origargv[i] <=
1170 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1171 )
1172 {
1173 s = PL_origargv[i];
1174 while (*s) s++;
1175 }
1176 else
1177 break;
54bfe034 1178 }
54bfe034 1179 }
3cb9023d 1180 /* Can we grab env area too to be used as the area for $0? */
43c32782
JH
1181 if (PL_origenviron) {
1182 if ((PL_origenviron[0] == s + 1
1183#ifdef OS2
1184 || (PL_origenviron[0] == s + 9 && (s += 8))
1185#endif
1186 )
1187 ||
1188 (aligned &&
1189 (PL_origenviron[0] > s &&
1190 PL_origenviron[0] <=
1191 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1192 )
1193 {
1194#ifndef OS2
1195 s = PL_origenviron[0];
1196 while (*s) s++;
1197#endif
1198 my_setenv("NoNe SuCh", Nullch);
1199 /* Force copy of environment. */
1200 for (i = 1; PL_origenviron[i]; i++) {
1201 if (PL_origenviron[i] == s + 1
1202 ||
1203 (aligned &&
1204 (PL_origenviron[i] > s &&
1205 PL_origenviron[i] <=
1206 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1207 )
1208 {
1209 s = PL_origenviron[i];
1210 while (*s) s++;
1211 }
1212 else
1213 break;
54bfe034 1214 }
43c32782 1215 }
54bfe034 1216 }
284e1220 1217 PL_origalen = s - PL_origargv[0] + 1;
54bfe034
JH
1218 }
1219
3280af22 1220 if (PL_do_undump) {
a0d0e21e
LW
1221
1222 /* Come here if running an undumped a.out. */
1223
3280af22
NIS
1224 PL_origfilename = savepv(argv[0]);
1225 PL_do_undump = FALSE;
a0d0e21e 1226 cxstack_ix = -1; /* start label stack again */
748a9306 1227 init_ids();
b7975bdd
NC
1228 assert (!PL_tainted);
1229 TAINT;
1230 S_set_caret_X(aTHX);
1231 TAINT_NOT;
a0d0e21e
LW
1232 init_postdump_symbols(argc,argv,env);
1233 return 0;
1234 }
1235
3280af22 1236 if (PL_main_root) {
3280af22
NIS
1237 op_free(PL_main_root);
1238 PL_main_root = Nullop;
ff0cee69 1239 }
3280af22
NIS
1240 PL_main_start = Nullop;
1241 SvREFCNT_dec(PL_main_cv);
1242 PL_main_cv = Nullcv;
79072805 1243
3280af22
NIS
1244 time(&PL_basetime);
1245 oldscope = PL_scopestack_ix;
599cee73 1246 PL_dowarn = G_WARN_OFF;
f86702cc 1247
14dd3ad8 1248 JMPENV_PUSH(ret);
6224f72b 1249 switch (ret) {
312caa8e 1250 case 0:
14dd3ad8 1251 parse_body(env,xsinit);
7d30b5c4
GS
1252 if (PL_checkav)
1253 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1254 ret = 0;
1255 break;
6224f72b
GS
1256 case 1:
1257 STATUS_ALL_FAILURE;
1258 /* FALL THROUGH */
1259 case 2:
1260 /* my_exit() was called */
3280af22 1261 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1262 LEAVE;
1263 FREETMPS;
3280af22 1264 PL_curstash = PL_defstash;
7d30b5c4
GS
1265 if (PL_checkav)
1266 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1267 ret = STATUS_NATIVE_EXPORT;
1268 break;
6224f72b 1269 case 3:
bf49b057 1270 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1271 ret = 1;
1272 break;
6224f72b 1273 }
14dd3ad8
GS
1274 JMPENV_POP;
1275 return ret;
1276}
1277
312caa8e 1278STATIC void *
14dd3ad8 1279S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1280{
27da23d5 1281 dVAR;
312caa8e 1282 int argc = PL_origargc;
8f42b153 1283 char **argv = PL_origargv;
e1ec3a88 1284 const char *scriptname = NULL;
312caa8e 1285 VOL bool dosearch = FALSE;
e1ec3a88 1286 const char *validarg = "";
312caa8e
CS
1287 register SV *sv;
1288 register char *s;
e1ec3a88 1289 const char *cddir = Nullch;
20ef40cf 1290 bool minus_f = FALSE;
312caa8e 1291
ae3f3efd
PS
1292 PL_fdscript = -1;
1293 PL_suidscript = -1;
3280af22 1294 sv_setpvn(PL_linestr,"",0);
79cb57f6 1295 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1296 SAVEFREESV(sv);
1297 init_main_stash();
54310121 1298
6224f72b
GS
1299 for (argc--,argv++; argc > 0; argc--,argv++) {
1300 if (argv[0][0] != '-' || !argv[0][1])
1301 break;
1302#ifdef DOSUID
1303 if (*validarg)
1304 validarg = " PHOOEY ";
1305 else
1306 validarg = argv[0];
ae3f3efd
PS
1307 /*
1308 * Can we rely on the kernel to start scripts with argv[1] set to
1309 * contain all #! line switches (the whole line)? (argv[0] is set to
1310 * the interpreter name, argv[2] to the script name; argv[3] and
1311 * above may contain other arguments.)
1312 */
13281fa4 1313#endif
6224f72b
GS
1314 s = argv[0]+1;
1315 reswitch:
1316 switch (*s) {
729a02f2 1317 case 'C':
1d5472a9
GS
1318#ifndef PERL_STRICT_CR
1319 case '\r':
1320#endif
6224f72b
GS
1321 case ' ':
1322 case '0':
1323 case 'F':
1324 case 'a':
1325 case 'c':
1326 case 'd':
1327 case 'D':
1328 case 'h':
1329 case 'i':
1330 case 'l':
1331 case 'M':
1332 case 'm':
1333 case 'n':
1334 case 'p':
1335 case 's':
1336 case 'u':
1337 case 'U':
1338 case 'v':
599cee73
PM
1339 case 'W':
1340 case 'X':
6224f72b 1341 case 'w':
06492da6 1342 case 'A':
155aba94 1343 if ((s = moreswitches(s)))
6224f72b
GS
1344 goto reswitch;
1345 break;
33b78306 1346
1dbad523 1347 case 't':
22f7c9c9 1348 CHECK_MALLOC_TOO_LATE_FOR('t');
317ea90d
MS
1349 if( !PL_tainting ) {
1350 PL_taint_warn = TRUE;
1351 PL_tainting = TRUE;
1352 }
1353 s++;
1354 goto reswitch;
6224f72b 1355 case 'T':
22f7c9c9 1356 CHECK_MALLOC_TOO_LATE_FOR('T');
3280af22 1357 PL_tainting = TRUE;
317ea90d 1358 PL_taint_warn = FALSE;
6224f72b
GS
1359 s++;
1360 goto reswitch;
f86702cc 1361
6224f72b 1362 case 'e':
bf4acbe4
GS
1363#ifdef MACOS_TRADITIONAL
1364 /* ignore -e for Dev:Pseudo argument */
1365 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
e55ac0fa 1366 break;
bf4acbe4 1367#endif
ae3f3efd 1368 forbid_setid("-e");
3280af22 1369 if (!PL_e_script) {
79cb57f6 1370 PL_e_script = newSVpvn("",0);
0cb96387 1371 filter_add(read_e_script, NULL);
6224f72b
GS
1372 }
1373 if (*++s)
3280af22 1374 sv_catpv(PL_e_script, s);
6224f72b 1375 else if (argv[1]) {
3280af22 1376 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1377 argc--,argv++;
1378 }
1379 else
cea2e8a9 1380 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1381 sv_catpv(PL_e_script, "\n");
6224f72b 1382 break;
afe37c7d 1383
20ef40cf
GA
1384 case 'f':
1385 minus_f = TRUE;
1386 s++;
1387 goto reswitch;
1388
6224f72b
GS
1389 case 'I': /* -I handled both here and in moreswitches() */
1390 forbid_setid("-I");
1391 if (!*++s && (s=argv[1]) != Nullch) {
1392 argc--,argv++;
1393 }
6224f72b 1394 if (s && *s) {
0df16ed7
GS
1395 char *p;
1396 STRLEN len = strlen(s);
1397 p = savepvn(s, len);
88fe16b2 1398 incpush(p, TRUE, TRUE, FALSE, FALSE);
0df16ed7
GS
1399 sv_catpvn(sv, "-I", 2);
1400 sv_catpvn(sv, p, len);
1401 sv_catpvn(sv, " ", 1);
6224f72b 1402 Safefree(p);
0df16ed7
GS
1403 }
1404 else
a67e862a 1405 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1406 break;
1407 case 'P':
1408 forbid_setid("-P");
3280af22 1409 PL_preprocess = TRUE;
6224f72b
GS
1410 s++;
1411 goto reswitch;
1412 case 'S':
1413 forbid_setid("-S");
1414 dosearch = TRUE;
1415 s++;
1416 goto reswitch;
1417 case 'V':
3280af22
NIS
1418 if (!PL_preambleav)
1419 PL_preambleav = newAV();
1420 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1421 if (*++s != ':') {
efcaa95b
YST
1422 STRLEN opts;
1423
3280af22 1424 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1425#ifdef VMS
6b88bc9c 1426 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1427#else
3280af22 1428 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1429#endif
efcaa95b
YST
1430 opts = SvCUR(PL_Sv);
1431
3280af22 1432 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1433# ifdef DEBUGGING
3280af22 1434 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1435# endif
6224f72b 1436# ifdef MULTIPLICITY
8f872242 1437 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1438# endif
4d1ff10f
AB
1439# ifdef USE_5005THREADS
1440 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1441# endif
ac5e8965
JH
1442# ifdef USE_ITHREADS
1443 sv_catpv(PL_Sv," USE_ITHREADS");
1444# endif
10cc9d2a
JH
1445# ifdef USE_64_BIT_INT
1446 sv_catpv(PL_Sv," USE_64_BIT_INT");
1447# endif
1448# ifdef USE_64_BIT_ALL
1449 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1450# endif
1451# ifdef USE_LONG_DOUBLE
1452 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1453# endif
53430762
JH
1454# ifdef USE_LARGE_FILES
1455 sv_catpv(PL_Sv," USE_LARGE_FILES");
1456# endif
ac5e8965
JH
1457# ifdef USE_SOCKS
1458 sv_catpv(PL_Sv," USE_SOCKS");
1459# endif
20ef40cf
GA
1460# ifdef USE_SITECUSTOMIZE
1461 sv_catpv(PL_Sv," USE_SITECUSTOMIZE");
1462# endif
b363f7ed
GS
1463# ifdef PERL_IMPLICIT_CONTEXT
1464 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1465# endif
1466# ifdef PERL_IMPLICIT_SYS
1467 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1468# endif
efcaa95b
YST
1469
1470 while (SvCUR(PL_Sv) > opts+76) {
1471 /* find last space after "options: " and before col 76 */
1472
dd374669
AL
1473 const char *space;
1474 char *pv = SvPV_nolen(PL_Sv);
1475 const char c = pv[opts+76];
efcaa95b
YST
1476 pv[opts+76] = '\0';
1477 space = strrchr(pv+opts+26, ' ');
1478 pv[opts+76] = c;
1479 if (!space) break; /* "Can't happen" */
1480
1481 /* break the line before that space */
1482
1483 opts = space - pv;
1484 sv_insert(PL_Sv, opts, 0,
1485 "\\n ", 25);
1486 }
1487
3280af22 1488 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1489
6224f72b
GS
1490#if defined(LOCAL_PATCH_COUNT)
1491 if (LOCAL_PATCH_COUNT > 0) {
1492 int i;
3280af22 1493 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1494 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1495 if (PL_localpatches[i])
acb03d05
AB
1496 Perl_sv_catpvf(aTHX_ PL_Sv,"q%c\t%s\n%c,",
1497 0, PL_localpatches[i], 0);
6224f72b
GS
1498 }
1499 }
1500#endif
cea2e8a9 1501 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1502#ifdef __DATE__
1503# ifdef __TIME__
cea2e8a9 1504 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1505# else
cea2e8a9 1506 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1507# endif
1508#endif
3280af22 1509 sv_catpv(PL_Sv, "; \
6224f72b 1510$\"=\"\\n \"; \
69fcd688
JH
1511@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1512#ifdef __CYGWIN__
1513 sv_catpv(PL_Sv,"\
1514push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1515#endif
1516 sv_catpv(PL_Sv, "\
6224f72b
GS
1517print \" \\%ENV:\\n @env\\n\" if @env; \
1518print \" \\@INC:\\n @INC\\n\";");
1519 }
1520 else {
3280af22
NIS
1521 PL_Sv = newSVpv("config_vars(qw(",0);
1522 sv_catpv(PL_Sv, ++s);
1523 sv_catpv(PL_Sv, "))");
6224f72b
GS
1524 s += strlen(s);
1525 }
3280af22 1526 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1527 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1528 goto reswitch;
1529 case 'x':
3280af22 1530 PL_doextract = TRUE;
6224f72b
GS
1531 s++;
1532 if (*s)
f4c556ac 1533 cddir = s;
6224f72b
GS
1534 break;
1535 case 0:
1536 break;
1537 case '-':
1538 if (!*++s || isSPACE(*s)) {
1539 argc--,argv++;
1540 goto switch_end;
1541 }
1542 /* catch use of gnu style long options */
1543 if (strEQ(s, "version")) {
dd374669 1544 s = (char *)"v";
6224f72b
GS
1545 goto reswitch;
1546 }
1547 if (strEQ(s, "help")) {
dd374669 1548 s = (char *)"h";
6224f72b
GS
1549 goto reswitch;
1550 }
1551 s--;
1552 /* FALL THROUGH */
1553 default:
cea2e8a9 1554 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1555 }
1556 }
6224f72b 1557 switch_end:
54310121 1558
f675dbe5
CB
1559 if (
1560#ifndef SECURE_INTERNAL_GETENV
1561 !PL_tainting &&
1562#endif
cf756827 1563 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1564 {
e1ec3a88 1565 const char *popt = s;
74288ac8
GS
1566 while (isSPACE(*s))
1567 s++;
317ea90d 1568 if (*s == '-' && *(s+1) == 'T') {
22f7c9c9 1569 CHECK_MALLOC_TOO_LATE_FOR('T');
74288ac8 1570 PL_tainting = TRUE;
317ea90d
MS
1571 PL_taint_warn = FALSE;
1572 }
74288ac8 1573 else {
cf756827 1574 char *popt_copy = Nullch;
74288ac8 1575 while (s && *s) {
4ea8f8fb 1576 char *d;
74288ac8
GS
1577 while (isSPACE(*s))
1578 s++;
1579 if (*s == '-') {
1580 s++;
1581 if (isSPACE(*s))
1582 continue;
1583 }
4ea8f8fb 1584 d = s;
74288ac8
GS
1585 if (!*s)
1586 break;
06492da6 1587 if (!strchr("DIMUdmtwA", *s))
cea2e8a9 1588 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1589 while (++s && *s) {
1590 if (isSPACE(*s)) {
cf756827
GS
1591 if (!popt_copy) {
1592 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1593 s = popt_copy + (s - popt);
1594 d = popt_copy + (d - popt);
1595 }
4ea8f8fb
MS
1596 *s++ = '\0';
1597 break;
1598 }
1599 }
1c4db469 1600 if (*d == 't') {
317ea90d
MS
1601 if( !PL_tainting ) {
1602 PL_taint_warn = TRUE;
1603 PL_tainting = TRUE;
1604 }
1c4db469
RGS
1605 } else {
1606 moreswitches(d);
1607 }
6224f72b 1608 }
6224f72b
GS
1609 }
1610 }
a0d0e21e 1611
20ef40cf
GA
1612#ifdef USE_SITECUSTOMIZE
1613 if (!minus_f) {
1614 if (!PL_preambleav)
1615 PL_preambleav = newAV();
1616 av_unshift(PL_preambleav, 1);
1617 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1618 }
1619#endif
1620
317ea90d
MS
1621 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1622 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1623 }
1624
6224f72b
GS
1625 if (!scriptname)
1626 scriptname = argv[0];
3280af22 1627 if (PL_e_script) {
6224f72b
GS
1628 argc++,argv--;
1629 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1630 }
1631 else if (scriptname == Nullch) {
1632#ifdef MSDOS
1633 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1634 moreswitches("h");
1635#endif
1636 scriptname = "-";
1637 }
1638
b7975bdd
NC
1639 /* Set $^X early so that it can be used for relocatable paths in @INC */
1640 assert (!PL_tainted);
1641 TAINT;
1642 S_set_caret_X(aTHX);
1643 TAINT_NOT;
6224f72b
GS
1644 init_perllib();
1645
c5cccb17 1646 open_script(scriptname,dosearch,sv);
6224f72b 1647
c5cccb17 1648 validate_suid(validarg, scriptname);
6224f72b 1649
64ca3a65 1650#ifndef PERL_MICRO
0b5b802d
GS
1651#if defined(SIGCHLD) || defined(SIGCLD)
1652 {
1653#ifndef SIGCHLD
1654# define SIGCHLD SIGCLD
1655#endif
1656 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1657 if (sigstate == SIG_IGN) {
1658 if (ckWARN(WARN_SIGNAL))
9014280d 1659 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
0b5b802d
GS
1660 "Can't ignore signal CHLD, forcing to default");
1661 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1662 }
1663 }
1664#endif
64ca3a65 1665#endif
0b5b802d 1666
bf4acbe4
GS
1667#ifdef MACOS_TRADITIONAL
1668 if (PL_doextract || gMacPerl_AlwaysExtract) {
1669#else
f4c556ac 1670 if (PL_doextract) {
bf4acbe4 1671#endif
6224f72b 1672 find_beginning();
dd374669 1673 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
f4c556ac
GS
1674 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1675
1676 }
6224f72b 1677
3280af22
NIS
1678 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1679 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1680 CvUNIQUE_on(PL_compcv);
1681
dd2155a4 1682 CvPADLIST(PL_compcv) = pad_new(0);
4d1ff10f 1683#ifdef USE_5005THREADS
533c011a
NIS
1684 CvOWNER(PL_compcv) = 0;
1685 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1686 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1687#endif /* USE_5005THREADS */
6224f72b 1688
0c4f7ff0 1689 boot_core_PerlIO();
6224f72b 1690 boot_core_UNIVERSAL();
09bef843 1691 boot_core_xsutils();
6224f72b
GS
1692
1693 if (xsinit)
acfe0abc 1694 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1695#ifndef PERL_MICRO
ed79a026 1696#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1697 init_os_extras();
6224f72b 1698#endif
64ca3a65 1699#endif
6224f72b 1700
29209bc5 1701#ifdef USE_SOCKS
1b9c9cf5
DH
1702# ifdef HAS_SOCKS5_INIT
1703 socks5_init(argv[0]);
1704# else
29209bc5 1705 SOCKSinit(argv[0]);
1b9c9cf5 1706# endif
ac27b0f5 1707#endif
29209bc5 1708
6224f72b
GS
1709 init_predump_symbols();
1710 /* init_postdump_symbols not currently designed to be called */
1711 /* more than once (ENV isn't cleared first, for example) */
1712 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1713 if (!PL_do_undump)
6224f72b
GS
1714 init_postdump_symbols(argc,argv,env);
1715
27da23d5
JH
1716 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
1717 * or explicitly in some platforms.
085a54d9 1718 * locale.c:Perl_init_i18nl10n() if the environment
a05d7ebb 1719 * look like the user wants to use UTF-8. */
27da23d5
JH
1720#if defined(SYMBIAN)
1721 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
1722#endif
06e66572
JH
1723 if (PL_unicode) {
1724 /* Requires init_predump_symbols(). */
a05d7ebb 1725 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
06e66572
JH
1726 IO* io;
1727 PerlIO* fp;
1728 SV* sv;
1729
a05d7ebb 1730 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
06e66572 1731 * and the default open disciplines. */
a05d7ebb
JH
1732 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
1733 PL_stdingv && (io = GvIO(PL_stdingv)) &&
1734 (fp = IoIFP(io)))
1735 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1736 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
1737 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
1738 (fp = IoOFP(io)))
1739 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1740 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
1741 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
1742 (fp = IoOFP(io)))
1743 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1744 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
1745 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1746 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
1747 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
1748 if (in) {
1749 if (out)
1750 sv_setpvn(sv, ":utf8\0:utf8", 11);
1751 else
1752 sv_setpvn(sv, ":utf8\0", 6);
1753 }
1754 else if (out)
1755 sv_setpvn(sv, "\0:utf8", 6);
1756 SvSETMAGIC(sv);
1757 }
b310b053
JH
1758 }
1759 }
1760
4ffa73a3
JH
1761 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
1762 if (strEQ(s, "unsafe"))
1763 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
1764 else if (strEQ(s, "safe"))
1765 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
1766 else
1767 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
1768 }
1769
6224f72b
GS
1770 init_lexer();
1771
1772 /* now parse the script */
1773
93189314 1774 SETERRNO(0,SS_NORMAL);
3280af22 1775 PL_error_count = 0;
bf4acbe4
GS
1776#ifdef MACOS_TRADITIONAL
1777 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1778 if (PL_minus_c)
1779 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1780 else {
1781 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1782 MacPerl_MPWFileName(PL_origfilename));
1783 }
1784 }
1785#else
3280af22
NIS
1786 if (yyparse() || PL_error_count) {
1787 if (PL_minus_c)
cea2e8a9 1788 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1789 else {
cea2e8a9 1790 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1791 PL_origfilename);
6224f72b
GS
1792 }
1793 }
bf4acbe4 1794#endif
57843af0 1795 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1796 PL_curstash = PL_defstash;
1797 PL_preprocess = FALSE;
1798 if (PL_e_script) {
1799 SvREFCNT_dec(PL_e_script);
1800 PL_e_script = Nullsv;
6224f72b
GS
1801 }
1802
3280af22 1803 if (PL_do_undump)
6224f72b
GS
1804 my_unexec();
1805
57843af0
GS
1806 if (isWARN_ONCE) {
1807 SAVECOPFILE(PL_curcop);
1808 SAVECOPLINE(PL_curcop);
3280af22 1809 gv_check(PL_defstash);
57843af0 1810 }
6224f72b
GS
1811
1812 LEAVE;
1813 FREETMPS;
1814
1815#ifdef MYMALLOC
1816 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1817 dump_mstats("after compilation:");
1818#endif
1819
1820 ENTER;
3280af22 1821 PL_restartop = 0;
312caa8e 1822 return NULL;
6224f72b
GS
1823}
1824
954c1994
GS
1825/*
1826=for apidoc perl_run
1827
1828Tells a Perl interpreter to run. See L<perlembed>.
1829
1830=cut
1831*/
1832
6224f72b 1833int
0cb96387 1834perl_run(pTHXx)
6224f72b 1835{
6224f72b 1836 I32 oldscope;
14dd3ad8 1837 int ret = 0;
db36c5a1 1838 dJMPENV;
6224f72b 1839
3280af22 1840 oldscope = PL_scopestack_ix;
96e176bf
CL
1841#ifdef VMS
1842 VMSISH_HUSHED = 0;
1843#endif
6224f72b 1844
14dd3ad8 1845 JMPENV_PUSH(ret);
6224f72b
GS
1846 switch (ret) {
1847 case 1:
1848 cxstack_ix = -1; /* start context stack again */
312caa8e 1849 goto redo_body;
14dd3ad8 1850 case 0: /* normal completion */
14dd3ad8
GS
1851 redo_body:
1852 run_body(oldscope);
14dd3ad8
GS
1853 /* FALL THROUGH */
1854 case 2: /* my_exit() */
3280af22 1855 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1856 LEAVE;
1857 FREETMPS;
3280af22 1858 PL_curstash = PL_defstash;
3a1ee7e8 1859 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
1860 PL_endav && !PL_minus_c)
1861 call_list(oldscope, PL_endav);
6224f72b
GS
1862#ifdef MYMALLOC
1863 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1864 dump_mstats("after execution: ");
1865#endif
14dd3ad8
GS
1866 ret = STATUS_NATIVE_EXPORT;
1867 break;
6224f72b 1868 case 3:
312caa8e
CS
1869 if (PL_restartop) {
1870 POPSTACK_TO(PL_mainstack);
1871 goto redo_body;
6224f72b 1872 }
bf49b057 1873 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1874 FREETMPS;
14dd3ad8
GS
1875 ret = 1;
1876 break;
6224f72b
GS
1877 }
1878
14dd3ad8
GS
1879 JMPENV_POP;
1880 return ret;
312caa8e
CS
1881}
1882
14dd3ad8 1883
dd374669 1884STATIC void
14dd3ad8
GS
1885S_run_body(pTHX_ I32 oldscope)
1886{
6224f72b 1887 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1888 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1889
3280af22 1890 if (!PL_restartop) {
6224f72b 1891 DEBUG_x(dump_all());
ecae49c0
NC
1892 if (!DEBUG_q_TEST)
1893 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1894 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1895 PTR2UV(thr)));
6224f72b 1896
3280af22 1897 if (PL_minus_c) {
bf4acbe4 1898#ifdef MACOS_TRADITIONAL
e69a2255
JH
1899 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
1900 (gMacPerl_ErrorFormat ? "# " : ""),
1901 MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1902#else
bf49b057 1903 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1904#endif
6224f72b
GS
1905 my_exit(0);
1906 }
3280af22 1907 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1908 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1909 if (PL_initav)
1910 call_list(oldscope, PL_initav);
6224f72b
GS
1911 }
1912
1913 /* do it */
1914
3280af22 1915 if (PL_restartop) {
533c011a 1916 PL_op = PL_restartop;
3280af22 1917 PL_restartop = 0;
cea2e8a9 1918 CALLRUNOPS(aTHX);
6224f72b 1919 }
3280af22
NIS
1920 else if (PL_main_start) {
1921 CvDEPTH(PL_main_cv) = 1;
533c011a 1922 PL_op = PL_main_start;
cea2e8a9 1923 CALLRUNOPS(aTHX);
6224f72b 1924 }
f6b3007c
JH
1925 my_exit(0);
1926 /* NOTREACHED */
6224f72b
GS
1927}
1928
954c1994 1929/*
ccfc67b7
JH
1930=head1 SV Manipulation Functions
1931
954c1994
GS
1932=for apidoc p||get_sv
1933
1934Returns the SV of the specified Perl scalar. If C<create> is set and the
1935Perl variable does not exist then it will be created. If C<create> is not
1936set and the variable does not exist then NULL is returned.
1937
1938=cut
1939*/
1940
6224f72b 1941SV*
864dbfa3 1942Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1943{
1944 GV *gv;
4d1ff10f 1945#ifdef USE_5005THREADS
6224f72b
GS
1946 if (name[1] == '\0' && !isALPHA(name[0])) {
1947 PADOFFSET tmp = find_threadsv(name);
411caa50 1948 if (tmp != NOT_IN_PAD)
6224f72b 1949 return THREADSV(tmp);
6224f72b 1950 }
4d1ff10f 1951#endif /* USE_5005THREADS */
6224f72b
GS
1952 gv = gv_fetchpv(name, create, SVt_PV);
1953 if (gv)
1954 return GvSV(gv);
1955 return Nullsv;
1956}
1957
954c1994 1958/*
ccfc67b7
JH
1959=head1 Array Manipulation Functions
1960
954c1994
GS
1961=for apidoc p||get_av
1962
1963Returns the AV of the specified Perl array. If C<create> is set and the
1964Perl variable does not exist then it will be created. If C<create> is not
1965set and the variable does not exist then NULL is returned.
1966
1967=cut
1968*/
1969
6224f72b 1970AV*
864dbfa3 1971Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1972{
1973 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1974 if (create)
1975 return GvAVn(gv);
1976 if (gv)
1977 return GvAV(gv);
1978 return Nullav;
1979}
1980
954c1994 1981/*
ccfc67b7
JH
1982=head1 Hash Manipulation Functions
1983
954c1994
GS
1984=for apidoc p||get_hv
1985
1986Returns the HV of the specified Perl hash. If C<create> is set and the
1987Perl variable does not exist then it will be created. If C<create> is not
1988set and the variable does not exist then NULL is returned.
1989
1990=cut
1991*/
1992
6224f72b 1993HV*
864dbfa3 1994Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1995{
a0d0e21e
LW
1996 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1997 if (create)
1998 return GvHVn(gv);
1999 if (gv)
2000 return GvHV(gv);
2001 return Nullhv;
2002}
2003
954c1994 2004/*
ccfc67b7
JH
2005=head1 CV Manipulation Functions
2006
954c1994
GS
2007=for apidoc p||get_cv
2008
2009Returns the CV of the specified Perl subroutine. If C<create> is set and
2010the Perl subroutine does not exist then it will be declared (which has the
2011same effect as saying C<sub name;>). If C<create> is not set and the
2012subroutine does not exist then NULL is returned.
2013
2014=cut
2015*/
2016
a0d0e21e 2017CV*
864dbfa3 2018Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
2019{
2020 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 2021 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
2022 /* XXX this is probably not what they think they're getting.
2023 * It has the same effect as "sub name;", i.e. just a forward
2024 * declaration! */
8ebc5c01 2025 if (create && !GvCVu(gv))
774d564b 2026 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 2027 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 2028 Nullop,
a0d0e21e
LW
2029 Nullop);
2030 if (gv)
8ebc5c01 2031 return GvCVu(gv);
a0d0e21e
LW
2032 return Nullcv;
2033}
2034
79072805
LW
2035/* Be sure to refetch the stack pointer after calling these routines. */
2036
954c1994 2037/*
ccfc67b7
JH
2038
2039=head1 Callback Functions
2040
954c1994
GS
2041=for apidoc p||call_argv
2042
2043Performs a callback to the specified Perl sub. See L<perlcall>.
2044
2045=cut
2046*/
2047
a0d0e21e 2048I32
8f42b153 2049Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 2050
8ac85365
NIS
2051 /* See G_* flags in cop.h */
2052 /* null terminated arg list */
8990e307 2053{
a0d0e21e 2054 dSP;
8990e307 2055
924508f0 2056 PUSHMARK(SP);
a0d0e21e 2057 if (argv) {
8990e307 2058 while (*argv) {
a0d0e21e 2059 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
2060 argv++;
2061 }
a0d0e21e 2062 PUTBACK;
8990e307 2063 }
864dbfa3 2064 return call_pv(sub_name, flags);
8990e307
LW
2065}
2066
954c1994
GS
2067/*
2068=for apidoc p||call_pv
2069
2070Performs a callback to the specified Perl sub. See L<perlcall>.
2071
2072=cut
2073*/
2074
a0d0e21e 2075I32
864dbfa3 2076Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
2077 /* name of the subroutine */
2078 /* See G_* flags in cop.h */
a0d0e21e 2079{
864dbfa3 2080 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
2081}
2082
954c1994
GS
2083/*
2084=for apidoc p||call_method
2085
2086Performs a callback to the specified Perl method. The blessed object must
2087be on the stack. See L<perlcall>.
2088
2089=cut
2090*/
2091
a0d0e21e 2092I32
864dbfa3 2093Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
2094 /* name of the subroutine */
2095 /* See G_* flags in cop.h */
a0d0e21e 2096{
968b3946 2097 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
2098}
2099
2100/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
2101/*
2102=for apidoc p||call_sv
2103
2104Performs a callback to the Perl sub whose name is in the SV. See
2105L<perlcall>.
2106
2107=cut
2108*/
2109
a0d0e21e 2110I32
864dbfa3 2111Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 2112 /* See G_* flags in cop.h */
a0d0e21e 2113{
27da23d5 2114 dVAR; dSP;
a0d0e21e 2115 LOGOP myop; /* fake syntax tree node */
968b3946 2116 UNOP method_op;
aa689395 2117 I32 oldmark;
13689cfe 2118 volatile I32 retval = 0;
a0d0e21e 2119 I32 oldscope;
54310121 2120 bool oldcatch = CATCH_GET;
6224f72b 2121 int ret;
533c011a 2122 OP* oldop = PL_op;
db36c5a1 2123 dJMPENV;
1e422769 2124
a0d0e21e
LW
2125 if (flags & G_DISCARD) {
2126 ENTER;
2127 SAVETMPS;
2128 }
2129
aa689395 2130 Zero(&myop, 1, LOGOP);
54310121 2131 myop.op_next = Nullop;
f51d4af5 2132 if (!(flags & G_NOARGS))
aa689395 2133 myop.op_flags |= OPf_STACKED;
54310121
PP
2134 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2135 (flags & G_ARRAY) ? OPf_WANT_LIST :
2136 OPf_WANT_SCALAR);
462e5cf6 2137 SAVEOP();
533c011a 2138 PL_op = (OP*)&myop;
aa689395 2139
3280af22
NIS
2140 EXTEND(PL_stack_sp, 1);
2141 *++PL_stack_sp = sv;
aa689395 2142 oldmark = TOPMARK;
3280af22 2143 oldscope = PL_scopestack_ix;
a0d0e21e 2144
3280af22 2145 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 2146 /* Handle first BEGIN of -d. */
3280af22 2147 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
2148 /* Try harder, since this may have been a sighandler, thus
2149 * curstash may be meaningless. */
3280af22 2150 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 2151 && !(flags & G_NODEBUG))
533c011a 2152 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 2153
968b3946
GS
2154 if (flags & G_METHOD) {
2155 Zero(&method_op, 1, UNOP);
2156 method_op.op_next = PL_op;
2157 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2158 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 2159 PL_op = (OP*)&method_op;
968b3946
GS
2160 }
2161
312caa8e 2162 if (!(flags & G_EVAL)) {
0cdb2077 2163 CATCH_SET(TRUE);
14dd3ad8 2164 call_body((OP*)&myop, FALSE);
312caa8e 2165 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 2166 CATCH_SET(oldcatch);
312caa8e
CS
2167 }
2168 else {
d78bda3d 2169 myop.op_other = (OP*)&myop;
3280af22 2170 PL_markstack_ptr--;
4633a7c4
LW
2171 /* we're trying to emulate pp_entertry() here */
2172 {
c09156bb 2173 register PERL_CONTEXT *cx;
f54cb97a 2174 const I32 gimme = GIMME_V;
ac27b0f5 2175
4633a7c4
LW
2176 ENTER;
2177 SAVETMPS;
ac27b0f5 2178
1d76a5c3 2179 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 2180 PUSHEVAL(cx, 0, 0);
533c011a 2181 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 2182
faef0170 2183 PL_in_eval = EVAL_INEVAL;
4633a7c4 2184 if (flags & G_KEEPERR)
faef0170 2185 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 2186 else
c69006e4 2187 sv_setpvn(ERRSV,"",0);
4633a7c4 2188 }
3280af22 2189 PL_markstack_ptr++;
a0d0e21e 2190
14dd3ad8 2191 JMPENV_PUSH(ret);
6224f72b
GS
2192 switch (ret) {
2193 case 0:
14dd3ad8
GS
2194 redo_body:
2195 call_body((OP*)&myop, FALSE);
312caa8e
CS
2196 retval = PL_stack_sp - (PL_stack_base + oldmark);
2197 if (!(flags & G_KEEPERR))
c69006e4 2198 sv_setpvn(ERRSV,"",0);
a0d0e21e 2199 break;
6224f72b 2200 case 1:
f86702cc 2201 STATUS_ALL_FAILURE;
a0d0e21e 2202 /* FALL THROUGH */
6224f72b 2203 case 2:
a0d0e21e 2204 /* my_exit() was called */
3280af22 2205 PL_curstash = PL_defstash;
a0d0e21e 2206 FREETMPS;
14dd3ad8 2207 JMPENV_POP;
cc3604b1 2208 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2209 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2210 my_exit_jump();
a0d0e21e 2211 /* NOTREACHED */
6224f72b 2212 case 3:
3280af22 2213 if (PL_restartop) {
533c011a 2214 PL_op = PL_restartop;
3280af22 2215 PL_restartop = 0;
312caa8e 2216 goto redo_body;
a0d0e21e 2217 }
3280af22 2218 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2219 if (flags & G_ARRAY)
2220 retval = 0;
2221 else {
2222 retval = 1;
3280af22 2223 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 2224 }
312caa8e 2225 break;
a0d0e21e 2226 }
a0d0e21e 2227
3280af22 2228 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
2229 SV **newsp;
2230 PMOP *newpm;
2231 I32 gimme;
c09156bb 2232 register PERL_CONTEXT *cx;
a0a2876f
LW
2233 I32 optype;
2234
2235 POPBLOCK(cx,newpm);
2236 POPEVAL(cx);
3280af22 2237 PL_curpm = newpm;
a0a2876f 2238 LEAVE;
a0d0e21e 2239 }
14dd3ad8 2240 JMPENV_POP;
a0d0e21e 2241 }
1e422769 2242
a0d0e21e 2243 if (flags & G_DISCARD) {
3280af22 2244 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2245 retval = 0;
2246 FREETMPS;
2247 LEAVE;
2248 }
533c011a 2249 PL_op = oldop;
a0d0e21e
LW
2250 return retval;
2251}
2252
312caa8e 2253STATIC void
dd374669 2254S_call_body(pTHX_ const OP *myop, bool is_eval)
312caa8e 2255{
312caa8e
CS
2256 if (PL_op == myop) {
2257 if (is_eval)
f807eda9 2258 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 2259 else
f807eda9 2260 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
2261 }
2262 if (PL_op)
cea2e8a9 2263 CALLRUNOPS(aTHX);
312caa8e
CS
2264}
2265
6e72f9df 2266/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 2267
954c1994
GS
2268/*
2269=for apidoc p||eval_sv
2270
2271Tells Perl to C<eval> the string in the SV.
2272
2273=cut
2274*/
2275
a0d0e21e 2276I32
864dbfa3 2277Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 2278
8ac85365 2279 /* See G_* flags in cop.h */
a0d0e21e 2280{
924508f0 2281 dSP;
a0d0e21e 2282 UNOP myop; /* fake syntax tree node */
8fa7f367 2283 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 2284 volatile I32 retval = 0;
6224f72b 2285 int ret;
533c011a 2286 OP* oldop = PL_op;
db36c5a1 2287 dJMPENV;
84902520 2288
4633a7c4
LW
2289 if (flags & G_DISCARD) {
2290 ENTER;
2291 SAVETMPS;
2292 }
2293
462e5cf6 2294 SAVEOP();
533c011a
NIS
2295 PL_op = (OP*)&myop;
2296 Zero(PL_op, 1, UNOP);
3280af22
NIS
2297 EXTEND(PL_stack_sp, 1);
2298 *++PL_stack_sp = sv;
79072805 2299
4633a7c4
LW
2300 if (!(flags & G_NOARGS))
2301 myop.op_flags = OPf_STACKED;
79072805 2302 myop.op_next = Nullop;
6e72f9df 2303 myop.op_type = OP_ENTEREVAL;
54310121
PP
2304 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2305 (flags & G_ARRAY) ? OPf_WANT_LIST :
2306 OPf_WANT_SCALAR);
6e72f9df
PP
2307 if (flags & G_KEEPERR)
2308 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2309
dedbcade
DM
2310 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2311 * before a PUSHEVAL, which corrupts the stack after a croak */
2312 TAINT_PROPER("eval_sv()");
2313
14dd3ad8 2314 JMPENV_PUSH(ret);
6224f72b
GS
2315 switch (ret) {
2316 case 0:
14dd3ad8
GS
2317 redo_body:
2318 call_body((OP*)&myop,TRUE);
312caa8e
CS
2319 retval = PL_stack_sp - (PL_stack_base + oldmark);
2320 if (!(flags & G_KEEPERR))
c69006e4 2321 sv_setpvn(ERRSV,"",0);
4633a7c4 2322 break;
6224f72b 2323 case 1:
f86702cc 2324 STATUS_ALL_FAILURE;
4633a7c4 2325 /* FALL THROUGH */
6224f72b 2326 case 2:
4633a7c4 2327 /* my_exit() was called */
3280af22 2328 PL_curstash = PL_defstash;
4633a7c4 2329 FREETMPS;
14dd3ad8 2330 JMPENV_POP;
cc3604b1 2331 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2332 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2333 my_exit_jump();
4633a7c4 2334 /* NOTREACHED */
6224f72b 2335 case 3:
3280af22 2336 if (PL_restartop) {
533c011a 2337 PL_op = PL_restartop;
3280af22 2338 PL_restartop = 0;
312caa8e 2339 goto redo_body;
4633a7c4 2340 }
3280af22 2341 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2342 if (flags & G_ARRAY)
2343 retval = 0;
2344 else {
2345 retval = 1;
3280af22 2346 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2347 }
312caa8e 2348 break;
4633a7c4
LW
2349 }
2350
14dd3ad8 2351 JMPENV_POP;
4633a7c4 2352 if (flags & G_DISCARD) {
3280af22 2353 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2354 retval = 0;
2355 FREETMPS;
2356 LEAVE;
2357 }
533c011a 2358 PL_op = oldop;
4633a7c4
LW
2359 return retval;
2360}
2361
954c1994
GS
2362/*
2363=for apidoc p||eval_pv
2364
2365Tells Perl to C<eval> the given string and return an SV* result.
2366
2367=cut
2368*/
2369
137443ea 2370SV*
864dbfa3 2371Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2372{
2373 dSP;
2374 SV* sv = newSVpv(p, 0);
2375
864dbfa3 2376 eval_sv(sv, G_SCALAR);
137443ea
PP
2377 SvREFCNT_dec(sv);
2378
2379 SPAGAIN;
2380 sv = POPs;
2381 PUTBACK;
2382
2d8e6c8d
GS
2383 if (croak_on_error && SvTRUE(ERRSV)) {
2384 STRLEN n_a;
cea2e8a9 2385 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2386 }
137443ea
PP
2387
2388 return sv;
2389}
2390
4633a7c4
LW
2391/* Require a module. */
2392
954c1994 2393/*
ccfc67b7
JH
2394=head1 Embedding Functions
2395
954c1994
GS
2396=for apidoc p||require_pv
2397
7d3fb230
BS
2398Tells Perl to C<require> the file named by the string argument. It is
2399analogous to the Perl code C<eval "require '$file'">. It's even
2307c6d0 2400implemented that way; consider using load_module instead.
954c1994 2401
7d3fb230 2402=cut */
954c1994 2403
4633a7c4 2404void
864dbfa3 2405Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2406{
d3acc0f7
JP
2407 SV* sv;
2408 dSP;
e788e7d3 2409 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2410 PUTBACK;
2411 sv = sv_newmortal();
4633a7c4
LW
2412 sv_setpv(sv, "require '");
2413 sv_catpv(sv, pv);
2414 sv_catpv(sv, "'");
864dbfa3 2415 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2416 SPAGAIN;
2417 POPSTACK;
79072805
LW
2418}
2419
79072805 2420void
e1ec3a88 2421Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
79072805
LW
2422{
2423 register GV *gv;
2424
155aba94 2425 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2426 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2427}
2428
76e3520e 2429STATIC void
e1ec3a88 2430S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
4633a7c4 2431{
ab821d7f 2432 /* This message really ought to be max 23 lines.
75c72d73 2433 * Removed -h because the user already knows that option. Others? */
fb73857a 2434
27da23d5 2435 static const char * const usage_msg[] = {
fb73857a 2436"-0[octal] specify record separator (\\0, if no argument)",
f4ca673a 2437"-A[name] activate all/given assertions",
fb73857a 2438"-a autosplit mode with -n or -p (splits $_ into @F)",
fb3560ee 2439"-C[number/list] enables the listed Unicode features",
1950ee41 2440"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2441"-d[:debugger] run program under debugger",
2442"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
90490ea3 2443"-e program one line of program (several -e's allowed, omit programfile)",
f71cb6df 2444#ifdef USE_SITECUSTOMIZE
20ef40cf 2445"-f don't do $sitelib/sitecustomize.pl at startup",
f71cb6df 2446#endif
aac3bd0d
GS
2447"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2448"-i[extension] edit <> files in place (makes backup if extension supplied)",
2449"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2450"-l[octal] enable line ending processing, specifies line terminator",
a0288114
AL
2451"-[mM][-]module execute \"use/no module...\" before executing program",
2452"-n assume \"while (<>) { ... }\" loop around program",
aac3bd0d
GS
2453"-p assume loop like -n but print line also, like sed",
2454"-P run program through C preprocessor before compilation",
2455"-s enable rudimentary parsing for switches after programfile",
2456"-S look for programfile using PATH environment variable",
9cbc33e8 2457"-t enable tainting warnings",
90490ea3 2458"-T enable tainting checks",
aac3bd0d 2459"-u dump core after parsing program",
fb73857a 2460"-U allow unsafe operations",
aac3bd0d
GS
2461"-v print version, subversion (includes VERY IMPORTANT perl info)",
2462"-V[:variable] print configuration summary (or a single Config.pm variable)",
2463"-w enable many useful warnings (RECOMMENDED)",
3c0facb2 2464"-W enable all warnings",
fb73857a 2465"-x[directory] strip off text before #!perl line and perhaps cd to directory",
90490ea3 2466"-X disable all warnings",
fb73857a
PP
2467"\n",
2468NULL
2469};
27da23d5 2470 const char * const *p = usage_msg;
fb73857a 2471
b0e47665
GS
2472 PerlIO_printf(PerlIO_stdout(),
2473 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2474 name);
fb73857a 2475 while (*p)
b0e47665 2476 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2477}
2478
b4ab917c
DM
2479/* convert a string of -D options (or digits) into an int.
2480 * sets *s to point to the char after the options */
2481
2482#ifdef DEBUGGING
2483int
e1ec3a88 2484Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
b4ab917c 2485{
27da23d5 2486 static const char * const usage_msgd[] = {
e6e64d9b
JC
2487 " Debugging flag values: (see also -d)",
2488 " p Tokenizing and parsing (with v, displays parse stack)",
3679267a 2489 " s Stack snapshots (with v, displays all stacks)",
e6e64d9b
JC
2490 " l Context (loop) stack processing",
2491 " t Trace execution",
2492 " o Method and overloading resolution",
2493 " c String/numeric conversions",
2494 " P Print profiling info, preprocessor command for -P, source file input state",
2495 " m Memory allocation",
2496 " f Format processing",
2497 " r Regular expression parsing and execution",
2498 " x Syntax tree dump",
3679267a 2499 " u Tainting checks",
e6e64d9b
JC
2500 " H Hash dump -- usurps values()",
2501 " X Scratchpad allocation",
2502 " D Cleaning up",
2503 " S Thread synchronization",
2504 " T Tokenising",
2505 " R Include reference counts of dumped variables (eg when using -Ds)",
2506 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2507 " v Verbose: use in conjunction with other flags",
2508 " C Copy On Write",
2509 " A Consistency checks on internal structures",
3679267a 2510 " q quiet - currently only suppresses the 'EXECUTING' message",
e6e64d9b
JC
2511 NULL
2512 };
b4ab917c
DM
2513 int i = 0;
2514 if (isALPHA(**s)) {
2515 /* if adding extra options, remember to update DEBUG_MASK */
bfed75c6 2516 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
b4ab917c
DM
2517
2518 for (; isALNUM(**s); (*s)++) {
e1ec3a88 2519 const char *d = strchr(debopts,**s);
b4ab917c
DM
2520 if (d)
2521 i |= 1 << (d - debopts);
2522 else if (ckWARN_d(WARN_DEBUGGING))
e6e64d9b
JC
2523 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2524 "invalid option -D%c, use -D'' to see choices\n", **s);
b4ab917c
DM
2525 }
2526 }
e6e64d9b 2527 else if (isDIGIT(**s)) {
b4ab917c
DM
2528 i = atoi(*s);
2529 for (; isALNUM(**s); (*s)++) ;
2530 }
ddcf8bc1 2531 else if (givehelp) {
aadb217d 2532 char **p = (char **)usage_msgd;
e6e64d9b
JC
2533 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2534 }
b4ab917c
DM
2535# ifdef EBCDIC
2536 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2537 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2538 "-Dp not implemented on this platform\n");
2539# endif
2540 return i;
2541}
2542#endif
2543
79072805
LW
2544/* This routine handles any switches that can be given during run */
2545
2546char *
864dbfa3 2547Perl_moreswitches(pTHX_ char *s)
79072805 2548{
27da23d5 2549 dVAR;
84c133a0 2550 UV rschar;
79072805
LW
2551
2552 switch (*s) {
2553 case '0':
a863c7d1 2554 {
f2095865 2555 I32 flags = 0;
a3b680e6 2556 STRLEN numlen;
f2095865
JH
2557
2558 SvREFCNT_dec(PL_rs);
2559 if (s[1] == 'x' && s[2]) {
a3b680e6 2560 const char *e = s+=2;
f2095865
JH
2561 U8 *tmps;
2562
a3b680e6
AL
2563 while (*e)
2564 e++;
f2095865
JH
2565 numlen = e - s;
2566 flags = PERL_SCAN_SILENT_ILLDIGIT;
2567 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2568 if (s + numlen < e) {
2569 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2570 numlen = 0;
2571 s--;
2572 }
2573 PL_rs = newSVpvn("", 0);
c5661c80 2574 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
f2095865
JH
2575 tmps = (U8*)SvPVX(PL_rs);
2576 uvchr_to_utf8(tmps, rschar);
2577 SvCUR_set(PL_rs, UNISKIP(rschar));
2578 SvUTF8_on(PL_rs);
2579 }
2580 else {
2581 numlen = 4;
2582 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2583 if (rschar & ~((U8)~0))
2584 PL_rs = &PL_sv_undef;
2585 else if (!rschar && numlen >= 2)
2586 PL_rs = newSVpvn("", 0);
2587 else {
2588 char ch = (char)rschar;
2589 PL_rs = newSVpvn(&ch, 1);
2590 }
2591 }
800633c3 2592 sv_setsv(get_sv("/", TRUE), PL_rs);
f2095865 2593 return s + numlen;
a863c7d1 2594 }
46487f74 2595 case 'C':
a05d7ebb 2596 s++;
dd374669 2597 PL_unicode = parse_unicode_opts( (const char **)&s );
46487f74 2598 return s;
2304df62 2599 case 'F':
3280af22 2600 PL_minus_F = TRUE;
ebce5377
RGS
2601 PL_splitstr = ++s;
2602 while (*s && !isSPACE(*s)) ++s;
2603 *s = '\0';
2604 PL_splitstr = savepv(PL_splitstr);
2304df62 2605 return s;
79072805 2606 case 'a':
3280af22 2607 PL_minus_a = TRUE;
79072805
LW
2608 s++;
2609 return s;
2610 case 'c':
3280af22 2611 PL_minus_c = TRUE;
79072805
LW
2612 s++;
2613 return s;
2614 case 'd':
bbce6d69 2615 forbid_setid("-d");
4633a7c4 2616 s++;
2cbb2ee1
RGS
2617
2618 /* -dt indicates to the debugger that threads will be used */
2619 if (*s == 't' && !isALNUM(s[1])) {
2620 ++s;
2621 my_setenv("PERL5DB_THREADED", "1");
2622 }
2623
70c94a19
RR
2624 /* The following permits -d:Mod to accepts arguments following an =
2625 in the fashion that -MSome::Mod does. */
2626 if (*s == ':' || *s == '=') {
06b5626a 2627 const char *start;
70c94a19
RR
2628 SV *sv;
2629 sv = newSVpv("use Devel::", 0);
2630 start = ++s;
2631 /* We now allow -d:Module=Foo,Bar */
2632 while(isALNUM(*s) || *s==':') ++s;
2633 if (*s != '=')
2634 sv_catpv(sv, start);
2635 else {
2636 sv_catpvn(sv, start, s-start);
2637 sv_catpv(sv, " split(/,/,q{");
2638 sv_catpv(sv, ++s);
3d27e215 2639 sv_catpv(sv, "})");
70c94a19 2640 }
4633a7c4 2641 s += strlen(s);
70c94a19 2642 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2643 }
ed094faf 2644 if (!PL_perldb) {
3280af22 2645 PL_perldb = PERLDB_ALL;
a0d0e21e 2646 init_debugger();
ed094faf 2647 }
79072805
LW
2648 return s;
2649 case 'D':
0453d815 2650 {
79072805 2651#ifdef DEBUGGING
bbce6d69 2652 forbid_setid("-D");
b4ab917c 2653 s++;
dd374669 2654 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
12a43e32 2655#else /* !DEBUGGING */
0453d815 2656 if (ckWARN_d(WARN_DEBUGGING))
9014280d 2657 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
e6e64d9b 2658 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
a0d0e21e 2659 for (s++; isALNUM(*s); s++) ;
79072805
LW
2660#endif
2661 /*SUPPRESS 530*/
2662 return s;
0453d815 2663 }
4633a7c4 2664 case 'h':
ac27b0f5 2665 usage(PL_origargv[0]);
7ca617d0 2666 my_exit(0);
79072805 2667 case 'i':
3280af22
NIS
2668 if (PL_inplace)
2669 Safefree(PL_inplace);
c030f24b
GH
2670#if defined(__CYGWIN__) /* do backup extension automagically */
2671 if (*(s+1) == '\0') {
2672 PL_inplace = savepv(".bak");
2673 return s+1;
2674 }
2675#endif /* __CYGWIN__ */
3280af22 2676 PL_inplace = savepv(s+1);
79072805 2677 /*SUPPRESS 530*/
3280af22 2678 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2679 if (*s) {
fb73857a 2680 *s++ = '\0';
7b8d334a
GS
2681 if (*s == '-') /* Additional switches on #! line. */
2682 s++;
2683 }
fb73857a 2684 return s;
4e49a025 2685 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2686 forbid_setid("-I");
fb73857a
PP
2687 ++s;
2688 while (*s && isSPACE(*s))
2689 ++s;
2690 if (*s) {
774d564b 2691 char *e, *p;
0df16ed7
GS
2692 p = s;
2693 /* ignore trailing spaces (possibly followed by other switches) */
2694 do {
2695 for (e = p; *e && !isSPACE(*e); e++) ;
2696 p = e;
2697 while (isSPACE(*p))
2698 p++;
2699 } while (*p && *p != '-');
2700 e = savepvn(s, e-s);
88fe16b2 2701 incpush(e, TRUE, TRUE, FALSE, FALSE);
0df16ed7
GS
2702 Safefree(e);
2703 s = p;
2704 if (*s == '-')
2705 s++;
79072805
LW
2706 }
2707 else
a67e862a 2708 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2709 return s;
79072805 2710 case 'l':
3280af22 2711 PL_minus_l = TRUE;
79072805 2712 s++;
7889fe52
NIS
2713 if (PL_ors_sv) {
2714 SvREFCNT_dec(PL_ors_sv);
2715 PL_ors_sv = Nullsv;
2716 }
79072805 2717 if (isDIGIT(*s)) {
53305cf1 2718 I32 flags = 0;
a3b680e6 2719 STRLEN numlen;
7889fe52 2720 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2721 numlen = 3 + (*s == '0');
2722 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2723 s += numlen;
2724 }
2725 else {
8bfdd7d9 2726 if (RsPARA(PL_rs)) {
7889fe52
NIS
2727 PL_ors_sv = newSVpvn("\n\n",2);
2728 }
2729 else {
8bfdd7d9 2730 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2731 }
79072805
LW
2732 }
2733 return s;
06492da6
SF
2734 case 'A':
2735 forbid_setid("-A");
930366bd
RGS
2736 if (!PL_preambleav)
2737 PL_preambleav = newAV();
06492da6 2738 if (*++s) {
3d27e215
LM
2739 SV *sv = newSVpv("use assertions::activate split(/,/,q", 0);
2740 sv_catpvn(sv, "\0", 1); /* Use NUL as q//-delimiter. */
06492da6 2741 sv_catpv(sv,s);
3d27e215 2742 sv_catpvn(sv, "\0)", 2);
06492da6 2743 s+=strlen(s);
06492da6
SF
2744 av_push(PL_preambleav, sv);
2745 }
2746 else
930366bd 2747 av_push(PL_preambleav, newSVpvn("use assertions::activate",24));
06492da6 2748 return s;
1a30305b 2749 case 'M':
bbce6d69 2750 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2751 /* FALL THROUGH */
2752 case 'm':
bbce6d69 2753 forbid_setid("-m"); /* XXX ? */
1a30305b 2754 if (*++s) {
a5f75d66 2755 char *start;
11343788 2756 SV *sv;
e1ec3a88 2757 const char *use = "use ";
a5f75d66
AD
2758 /* -M-foo == 'no foo' */
2759 if (*s == '-') { use = "no "; ++s; }
11343788 2760 sv = newSVpv(use,0);
a5f75d66 2761 start = s;
1a30305b 2762 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2763 while(isALNUM(*s) || *s==':') ++s;
2764 if (*s != '=') {
11343788 2765 sv_catpv(sv, start);
c07a80fd
PP
2766 if (*(start-1) == 'm') {
2767 if (*s != '\0')
cea2e8a9 2768 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2769 sv_catpv( sv, " ()");
c07a80fd
PP
2770 }
2771 } else {
6df41af2 2772 if (s == start)
be98fb35
GS
2773 Perl_croak(aTHX_ "Module name required with -%c option",
2774 s[-1]);
11343788 2775 sv_catpvn(sv, start, s-start);
3d27e215
LM
2776 sv_catpv(sv, " split(/,/,q");
2777 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
11343788 2778 sv_catpv(sv, ++s);
3d27e215 2779 sv_catpvn(sv, "\0)", 2);
c07a80fd 2780 }
1a30305b 2781 s += strlen(s);
5c831c24 2782 if (!PL_preambleav)
3280af22
NIS
2783 PL_preambleav = newAV();
2784 av_push(PL_preambleav, sv);
1a30305b
PP
2785 }
2786 else
9e81e6a1 2787 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
1a30305b 2788 return s;
79072805 2789 case 'n':
3280af22 2790 PL_minus_n = TRUE;
79072805
LW
2791 s++;
2792 return s;
2793 case 'p':
3280af22 2794 PL_minus_p = TRUE;
79072805
LW
2795 s++;
2796 return s;
2797 case 's':
bbce6d69 2798 forbid_setid("-s");
3280af22 2799 PL_doswitches = TRUE;
79072805
LW
2800 s++;
2801 return s;
6537fe72
MS
2802 case 't':
2803 if (!PL_tainting)
22f7c9c9 2804 TOO_LATE_FOR('t');
6537fe72
MS
2805 s++;
2806 return s;
463ee0b2 2807 case 'T':
3280af22 2808 if (!PL_tainting)
22f7c9c9 2809 TOO_LATE_FOR('T');
463ee0b2
LW
2810 s++;
2811 return s;
79072805 2812 case 'u':
bf4acbe4
GS
2813#ifdef MACOS_TRADITIONAL
2814 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2815#endif
3280af22 2816 PL_do_undump = TRUE;
79072805
LW
2817 s++;
2818 return s;
2819 case 'U':
3280af22 2820 PL_unsafe = TRUE;
79072805
LW
2821 s++;
2822 return s;
2823 case 'v':
d7aa5382
JP
2824 if (!sv_derived_from(PL_patchlevel, "version"))
2825 (void *)upg_version(PL_patchlevel);
8e9464f1 2826#if !defined(DGUX)
b0e47665 2827 PerlIO_printf(PerlIO_stdout(),
014ead4b 2828 Perl_form(aTHX_ "\nThis is perl, v%"SVf" built for %s",
d7aa5382
JP
2829 vstringify(PL_patchlevel),
2830 ARCHNAME));
8e9464f1
JH
2831#else /* DGUX */
2832/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2833 PerlIO_printf(PerlIO_stdout(),
014ead4b 2834 Perl_form(aTHX_ "\nThis is perl, v%"SVf"\n",
d7aa5382 2835 vstringify(PL_patchlevel)));
8e9464f1
JH
2836 PerlIO_printf(PerlIO_stdout(),
2837 Perl_form(aTHX_ " built under %s at %s %s\n",
2838 OSNAME, __DATE__, __TIME__));
2839 PerlIO_printf(PerlIO_stdout(),
2840 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2841 OSVERS));
8e9464f1
JH
2842#endif /* !DGUX */
2843
fb73857a
PP
2844#if defined(LOCAL_PATCH_COUNT)
2845 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2846 PerlIO_printf(PerlIO_stdout(),
2847 "\n(with %d registered patch%s, "
2848 "see perl -V for more detail)",
2849 (int)LOCAL_PATCH_COUNT,
2850 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2851#endif
1a30305b 2852
b0e47665 2853 PerlIO_printf(PerlIO_stdout(),
359b00fe 2854 "\n\nCopyright 1987-2005, Larry Wall\n");
eae9c151
JH
2855#ifdef MACOS_TRADITIONAL
2856 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2857 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 2858 "maintained by Chris Nandor\n");
eae9c151 2859#endif
79072805 2860#ifdef MSDOS
b0e47665
GS
2861 PerlIO_printf(PerlIO_stdout(),
2862 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2863#endif
2864#ifdef DJGPP
b0e47665
GS
2865 PerlIO_printf(PerlIO_stdout(),
2866 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2867 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2868#endif
79072805 2869#ifdef OS2
b0e47665
GS
2870 PerlIO_printf(PerlIO_stdout(),
2871 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 2872 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2873#endif
79072805 2874#ifdef atarist
b0e47665
GS
2875 PerlIO_printf(PerlIO_stdout(),
2876 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2877#endif
a3f9223b 2878#ifdef __BEOS__
b0e47665
GS
2879 PerlIO_printf(PerlIO_stdout(),
2880 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2881#endif
1d84e8df 2882#ifdef MPE
b0e47665 2883 PerlIO_printf(PerlIO_stdout(),
e583a879 2884 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
1d84e8df 2885#endif
9d116dd7 2886#ifdef OEMVS
b0e47665
GS
2887 PerlIO_printf(PerlIO_stdout(),
2888 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2889#endif
495c5fdc 2890#ifdef __VOS__
b0e47665 2891 PerlIO_printf(PerlIO_stdout(),
94efb9fb 2892 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 2893#endif
092bebab 2894#ifdef __OPEN_VM
b0e47665
GS
2895 PerlIO_printf(PerlIO_stdout(),
2896 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2897#endif
a1a0e61e 2898#ifdef POSIX_BC
b0e47665
GS
2899 PerlIO_printf(PerlIO_stdout(),
2900 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2901#endif
61ae2fbf 2902#ifdef __MINT__
b0e47665
GS
2903 PerlIO_printf(PerlIO_stdout(),
2904 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2905#endif
f83d2536 2906#ifdef EPOC
b0e47665 2907 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2908 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 2909#endif
e1caacb4 2910#ifdef UNDER_CE
b475b3e6
JH
2911 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
2912 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
e1caacb4
JH
2913 wce_hitreturn();
2914#endif
27da23d5
JH
2915#ifdef SYMBIAN
2916 PerlIO_printf(PerlIO_stdout(),
2917 "Symbian port by Nokia, 2004-2005\n");
2918#endif
baed7233
DL
2919#ifdef BINARY_BUILD_NOTICE
2920 BINARY_BUILD_NOTICE;
2921#endif
b0e47665
GS
2922 PerlIO_printf(PerlIO_stdout(),
2923 "\n\
79072805 2924Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2925GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687 2926Complete documentation for Perl, including FAQ lists, should be found on\n\
a0288114 2927this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
c9e30dd8 2928Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
7ca617d0 2929 my_exit(0);
79072805 2930 case 'w':
599cee73 2931 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2932 PL_dowarn |= G_WARN_ON;
599cee73
PM
2933 s++;
2934 return s;
2935 case 'W':
ac27b0f5 2936 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS
2937 if (!specialWARN(PL_compiling.cop_warnings))
2938 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2939 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2940 s++;
2941 return s;
2942 case 'X':
ac27b0f5 2943 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS
2944 if (!specialWARN(PL_compiling.cop_warnings))
2945 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2946 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2947 s++;
2948 return s;
a0d0e21e 2949 case '*':
79072805
LW
2950 case ' ':
2951 if (s[1] == '-') /* Additional switches on #! line. */
2952 return s+2;
2953 break;
a0d0e21e 2954 case '-':
79072805 2955 case 0:
51882d45 2956#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2957 case '\r':
2958#endif
79072805
LW
2959 case '\n':
2960 case '\t':
2961 break;
aa689395
PP
2962#ifdef ALTERNATE_SHEBANG
2963 case 'S': /* OS/2 needs -S on "extproc" line. */
2964 break;
2965#endif
a0d0e21e 2966 case 'P':
3280af22 2967 if (PL_preprocess)
a0d0e21e
LW
2968 return s+1;
2969 /* FALL THROUGH */
79072805 2970 default:
cea2e8a9 2971 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2972 }
2973 return Nullch;
2974}
2975
2976/* compliments of Tom Christiansen */
2977
2978/* unexec() can be found in the Gnu emacs distribution */
ee580363 2979/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2980
2981void
864dbfa3 2982Perl_my_unexec(pTHX)
79072805
LW
2983{
2984#ifdef UNEXEC
46fc3d4c
PP
2985 SV* prog;
2986 SV* file;
ee580363 2987 int status = 1;
79072805
LW
2988 extern int etext;
2989
ee580363 2990 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2991 sv_catpv(prog, "/perl");
6b88bc9c 2992 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2993 sv_catpv(file, ".perldump");
79072805 2994
ee580363
GS
2995 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2996 /* unexec prints msg to stderr in case of failure */
6ad3d225 2997 PerlProc_exit(status);
79072805 2998#else
a5f75d66
AD
2999# ifdef VMS
3000# include <lib$routines.h>
3001 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 3002# else
79072805 3003 ABORT(); /* for use with undump */
aa689395 3004# endif
a5f75d66 3005#endif
79072805
LW
3006}
3007
cb68f92d
GS
3008/* initialize curinterp */
3009STATIC void
cea2e8a9 3010S_init_interp(pTHX)
cb68f92d
GS
3011{
3012
acfe0abc
GS
3013#ifdef MULTIPLICITY
3014# define PERLVAR(var,type)
3015# define PERLVARA(var,n,type)
3016# if defined(PERL_IMPLICIT_CONTEXT)
3017# if defined(USE_5005THREADS)
3018# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
27da23d5 3019# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
3020# else /* !USE_5005THREADS */
3021# define PERLVARI(var,type,init) aTHX->var = init;
3022# define PERLVARIC(var,type,init) aTHX->var = init;
3023# endif /* USE_5005THREADS */
3967c732 3024# else
acfe0abc
GS
3025# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3026# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 3027# endif
acfe0abc
GS
3028# include "intrpvar.h"
3029# ifndef USE_5005THREADS
3030# include "thrdvar.h"
3031# endif
3032# undef PERLVAR
3033# undef PERLVARA
3034# undef PERLVARI
3035# undef PERLVARIC
3036#else
3037# define PERLVAR(var,type)
3038# define PERLVARA(var,n,type)
3039# define PERLVARI(var,type,init) PL_##var = init;
3040# define PERLVARIC(var,type,init) PL_##var = init;
3041# include "intrpvar.h"
3042# ifndef USE_5005THREADS
3043# include "thrdvar.h"
3044# endif
3045# undef PERLVAR
3046# undef PERLVARA
3047# undef PERLVARI
3048# undef PERLVARIC
cb68f92d
GS
3049#endif
3050
cb68f92d
GS
3051}
3052
76e3520e 3053STATIC void
cea2e8a9 3054S_init_main_stash(pTHX)
79072805 3055{
463ee0b2 3056 GV *gv;
6e72f9df 3057
3280af22 3058 PL_curstash = PL_defstash = newHV();
79cb57f6 3059 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
3060 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3061 SvREFCNT_dec(GvHV(gv));
3280af22 3062 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 3063 SvREADONLY_on(gv);
bfcb3514 3064 Perl_hv_name_set(aTHX_ PL_defstash, "main", 4, 0);
3280af22
NIS
3065 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3066 GvMULTI_on(PL_incgv);
3067 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3068 GvMULTI_on(PL_hintgv);
3069 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3070 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3071 GvMULTI_on(PL_errgv);
3072 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3073 GvMULTI_on(PL_replgv);
cea2e8a9 3074 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
3075 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3076 sv_setpvn(ERRSV, "", 0);
3280af22 3077 PL_curstash = PL_defstash;
11faa288 3078 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 3079 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 3080 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 3081 /* We must init $/ before switches are processed. */
864dbfa3 3082 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
3083}
3084
ae3f3efd 3085/* PSz 18 Nov 03 fdscript now global but do not change prototype */
76e3520e 3086STATIC void
dd374669 3087S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
79072805 3088{
ae3f3efd 3089#ifndef IAMSUID
e1ec3a88
AL
3090 const char *quote;
3091 const char *code;
3092 const char *cpp_discard_flag;
3093 const char *perl;
ae3f3efd 3094#endif
27da23d5 3095 dVAR;
1b24ed4b 3096
ae3f3efd
PS
3097 PL_fdscript = -1;
3098 PL_suidscript = -1;
79072805 3099
3280af22 3100 if (PL_e_script) {
ff5bdd37 3101 PL_origfilename = savepvn("-e", 2);
96436eeb 3102 }
6c4ab083
GS
3103 else {
3104 /* if find_script() returns, it returns a malloc()-ed value */
dd374669 3105 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
3106
3107 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
e1ec3a88 3108 const char *s = scriptname + 8;
ae3f3efd 3109 PL_fdscript = atoi(s);
6c4ab083
GS
3110 while (isDIGIT(*s))
3111 s++;
3112 if (*s) {
ae3f3efd
PS
3113 /* PSz 18 Feb 04
3114 * Tell apart "normal" usage of fdscript, e.g.
3115 * with bash on FreeBSD:
3116 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3117 * from usage in suidperl.
3118 * Does any "normal" usage leave garbage after the number???
3119 * Is it a mistake to use a similar /dev/fd/ construct for
3120 * suidperl?
3121 */
3122 PL_suidscript = 1;
3123 /* PSz 20 Feb 04
3124 * Be supersafe and do some sanity-checks.
3125 * Still, can we be sure we got the right thing?
3126 */
3127 if (*s != '/') {
3128 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3129 }
3130 if (! *(s+1)) {
3131 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3132 }
6c4ab083 3133 scriptname = savepv(s + 1);
3280af22 3134 Safefree(PL_origfilename);
dd374669 3135 PL_origfilename = (char *)scriptname;
6c4ab083
GS
3136 }
3137 }
3138 }
3139
05ec9bb3 3140 CopFILE_free(PL_curcop);
57843af0 3141 CopFILE_set(PL_curcop, PL_origfilename);
770526c1 3142 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
dd374669 3143 scriptname = (char *)"";
ae3f3efd
PS
3144 if (PL_fdscript >= 0) {
3145 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS
3146# if defined(HAS_FCNTL) && defined(F_SETFD)
3147 if (PL_rsfp)
3148 /* ensure close-on-exec */
3149 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3150# endif
96436eeb 3151 }
ae3f3efd
PS
3152#ifdef IAMSUID
3153 else {
86207487
NC
3154 Perl_croak(aTHX_ "sperl needs fd script\n"
3155 "You should not call sperl directly; do you need to "
3156 "change a #! line\nfrom sperl to perl?\n");
3157
ae3f3efd
PS
3158/* PSz 11 Nov 03
3159 * Do not open (or do other fancy stuff) while setuid.
3160 * Perl does the open, and hands script to suidperl on a fd;
3161 * suidperl only does some checks, sets up UIDs and re-execs
3162 * perl with that fd as it has always done.
3163 */
3164 }
3165 if (PL_suidscript != 1) {
3166 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3167 }
3168#else /* IAMSUID */
3280af22 3169 else if (PL_preprocess) {
dd374669 3170 const char *cpp_cfg = CPPSTDIN;
79cb57f6 3171 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
3172 SV *cmd = NEWSV(0,0);
3173
ae58f265
JH
3174 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3175 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
46fc3d4c 3176 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 3177 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 3178 sv_catpv(cpp, cpp_cfg);
79072805 3179
1b24ed4b
MS
3180# ifndef VMS
3181 sv_catpvn(sv, "-I", 2);
3182 sv_catpv(sv,PRIVLIB_EXP);
3183# endif
46fc3d4c 3184
14953ddc
MB
3185 DEBUG_P(PerlIO_printf(Perl_debug_log,
3186 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3187 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS
3188
3189# if defined(MSDOS) || defined(WIN32) || defined(VMS)
3190 quote = "\"";
3191# else
3192 quote = "'";
3193# endif
3194
3195# ifdef VMS
3196 cpp_discard_flag = "";
3197# else
3198 cpp_discard_flag = "-C";
3199# endif
3200
3201# ifdef OS2
3202 perl = os2_execname(aTHX);
3203# else
3204 perl = PL_origargv[0];
3205# endif
3206
3207
3208 /* This strips off Perl comments which might interfere with
62375a60
NIS
3209 the C pre-processor, including #!. #line directives are
3210 deliberately stripped to avoid confusion with Perl's version
1b24ed4b
MS
3211 of #line. FWP played some golf with it so it will fit
3212 into VMS's 255 character buffer.
3213 */
3214 if( PL_doextract )
3215 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3216 else
3217 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3218
3219 Perl_sv_setpvf(aTHX_ cmd, "\
3220%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
62375a60 3221 perl, quote, code, quote, scriptname, cpp,
1b24ed4b
MS
3222 cpp_discard_flag, sv, CPPMINUS);
3223
3280af22 3224 PL_doextract = FALSE;
0a6c758d 3225
62375a60
NIS
3226 DEBUG_P(PerlIO_printf(Perl_debug_log,
3227 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS
3228 SvPVX(cmd)));
3229
dd374669 3230 PL_rsfp = PerlProc_popen(SvPVX(cmd), (char *)"r");
46fc3d4c
PP
3231 SvREFCNT_dec(cmd);
3232 SvREFCNT_dec(cpp);
79072805
LW
3233 }
3234 else if (!*scriptname) {
bbce6d69 3235 forbid_setid("program input from stdin");
3280af22 3236 PL_rsfp = PerlIO_stdin();
79072805 3237 }
96436eeb 3238 else {
3280af22 3239 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS
3240# if defined(HAS_FCNTL) && defined(F_SETFD)
3241 if (PL_rsfp)
3242 /* ensure close-on-exec */
3243 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3244# endif
96436eeb 3245 }
ae3f3efd 3246#endif /* IAMSUID */
3280af22 3247 if (!PL_rsfp) {
447218f8 3248 /* PSz 16 Sep 03 Keep neat error message */
fa3aa65a
JC
3249 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3250 CopFILE(PL_curcop), Strerror(errno));
13281fa4 3251 }
79072805 3252}
8d063cd8 3253
7b89560d
JH
3254/* Mention
3255 * I_SYSSTATVFS HAS_FSTATVFS
3256 * I_SYSMOUNT
c890dc6c 3257 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
3258 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3259 * here so that metaconfig picks them up. */
3260
104d25b7 3261#ifdef IAMSUID
864dbfa3 3262STATIC int
e688b231 3263S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 3264{
ae3f3efd
PS
3265/* PSz 27 Feb 04
3266 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3267 * but is needed also on machines without setreuid.
3268 * Seems safe enough to run as root.
3269 */
0545a864
JH
3270 int check_okay = 0; /* able to do all the required sys/libcalls */
3271 int on_nosuid = 0; /* the fd is on a nosuid fs */
ae3f3efd
PS
3272 /* PSz 12 Nov 03
3273 * Need to check noexec also: nosuid might not be set, the average
3274 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3275 */
3276 int on_noexec = 0; /* the fd is on a noexec fs */
3277
104d25b7 3278/*
ad27e871 3279 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 3280 * fstatvfs() is UNIX98.
0545a864 3281 * fstatfs() is 4.3 BSD.
ad27e871 3282 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
3283 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3284 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
3285 */
3286
6439433f
JH
3287#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3288
3289# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3290 defined(HAS_FSTATVFS)
3291# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 3292 struct statvfs stfs;
6439433f 3293
104d25b7
JH
3294 check_okay = fstatvfs(fd, &stfs) == 0;
3295 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
ae3f3efd
PS
3296#ifdef ST_NOEXEC
3297 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3298 on platforms where it is present. */
3299 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3300#endif
6439433f 3301# endif /* fstatvfs */
ac27b0f5 3302
6439433f
JH
3303# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3304 defined(PERL_MOUNT_NOSUID) && \
ae3f3efd 3305 defined(PERL_MOUNT_NOEXEC) && \
6439433f
JH
3306 defined(HAS_FSTATFS) && \
3307 defined(HAS_STRUCT_STATFS) && \
3308 defined(HAS_STRUCT_STATFS_F_FLAGS)
3309# define FD_ON_NOSUID_CHECK_OKAY
e688b231 3310 struct statfs stfs;
6439433f 3311
104d25b7 3312 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 3313 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
ae3f3efd 3314 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
6439433f
JH
3315# endif /* fstatfs */
3316
3317# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3318 defined(PERL_MOUNT_NOSUID) && \
ae3f3efd 3319 defined(PERL_MOUNT_NOEXEC) && \
6439433f
JH
3320 defined(HAS_FSTAT) && \
3321 defined(HAS_USTAT) && \
3322 defined(HAS_GETMNT) && \
3323 defined(HAS_STRUCT_FS_DATA) && \
3324 defined(NOSTAT_ONE)
3325# define FD_ON_NOSUID_CHECK_OKAY
c623ac67 3326 Stat_t fdst;
6439433f 3327
0545a864 3328 if (fstat(fd, &fdst) == 0) {
6439433f
JH
3329 struct ustat us;
3330 if (ustat(fdst.st_dev, &us) == 0) {
3331 struct fs_data fsd;
3332 /* NOSTAT_ONE here because we're not examining fields which
3333 * vary between that case and STAT_ONE. */
ad27e871 3334 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
3335 size_t cmplen = sizeof(us.f_fname);
3336 if (sizeof(fsd.fd_req.path) < cmplen)
3337 cmplen = sizeof(fsd.fd_req.path);
3338 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3339 fdst.st_dev == fsd.fd_req.dev) {
3340 check_okay = 1;
3341 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
ae3f3efd 3342 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
6439433f
JH
3343 }
3344 }
3345 }
3346 }
0545a864 3347 }
6439433f
JH
3348# endif /* fstat+ustat+getmnt */
3349
3350# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3351 defined(HAS_GETMNTENT) && \
3352 defined(HAS_HASMNTOPT) && \
ae3f3efd
PS
3353 defined(MNTOPT_NOSUID) && \
3354 defined(MNTOPT_NOEXEC)
6439433f
JH
3355# define FD_ON_NOSUID_CHECK_OKAY
3356 FILE *mtab = fopen("/etc/mtab", "r");
3357 struct mntent *entry;
c623ac67 3358 Stat_t stb, fsb;
104d25b7
JH
3359
3360 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
3361 while (entry = getmntent(mtab)) {
3362 if (stat(entry->mnt_dir, &fsb) == 0
3363 && fsb.st_dev == stb.st_dev)
3364 {
3365 /* found the filesystem */
3366 check_okay = 1;
3367 if (hasmntopt(entry, MNTOPT_NOSUID))
3368 on_nosuid = 1;
ae3f3efd
PS
3369 if (hasmntopt(entry, MNTOPT_NOEXEC))
3370 on_noexec = 1;
6439433f
JH
3371 break;
3372 } /* A single fs may well fail its stat(). */
3373 }
104d25b7
JH
3374 }
3375 if (mtab)
6439433f
JH
3376 fclose(mtab);
3377# endif /* getmntent+hasmntopt */
0545a864 3378
ac27b0f5 3379 if (!check_okay)
ae3f3efd
PS
3380 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3381 if (on_nosuid)
3382 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3383 if (on_noexec)
3384 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3385 return ((!check_okay) || on_nosuid || on_noexec);
104d25b7
JH
3386}
3387#endif /* IAMSUID */
3388
76e3520e 3389STATIC void
e1ec3a88 3390S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
79072805 3391{
27da23d5 3392 dVAR;
155aba94 3393#ifdef IAMSUID
ae3f3efd
PS
3394 /* int which; */
3395#endif /* IAMSUID */
96436eeb 3396
13281fa4
LW
3397 /* do we need to emulate setuid on scripts? */
3398
3399 /* This code is for those BSD systems that have setuid #! scripts disabled
3400 * in the kernel because of a security problem. Merely defining DOSUID
3401 * in perl will not fix that problem, but if you have disabled setuid
3402 * scripts in the kernel, this will attempt to emulate setuid and setgid
3403 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
3404 * root version must be called suidperl or sperlN.NNN. If regular perl
3405 * discovers that it has opened a setuid script, it calls suidperl with
3406 * the same argv that it had. If suidperl finds that the script it has
3407 * just opened is NOT setuid root, it sets the effective uid back to the
3408 * uid. We don't just make perl setuid root because that loses the
3409 * effective uid we had before invoking perl, if it was different from the
3410 * uid.
ae3f3efd
PS
3411 * PSz 27 Feb 04
3412 * Description/comments above do not match current workings:
3413 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3414 * suidperl called with script open and name changed to /dev/fd/N/X;
3415 * suidperl croaks if script is not setuid;
3416 * making perl setuid would be a huge security risk (and yes, that
3417 * would lose any euid we might have had).
13281fa4
LW
3418 *
3419 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3420 * be defined in suidperl only. suidperl must be setuid root. The
3421 * Configure script will set this up for you if you want it.
3422 */
a687059c 3423
13281fa4 3424#ifdef DOSUID
6e72f9df 3425 char *s, *s2;
a0d0e21e 3426
b28d0864 3427 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 3428 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
ae3f3efd 3429 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 3430 I32 len;
2d8e6c8d 3431 STRLEN n_a;
13281fa4 3432
a687059c 3433#ifdef IAMSUID
ae3f3efd
PS
3434 if (PL_fdscript < 0 || PL_suidscript != 1)
3435 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3436 /* PSz 11 Nov 03
3437 * Since the script is opened by perl, not suidperl, some of these
3438 * checks are superfluous. Leaving them in probably does not lower
3439 * security(?!).
3440 */
3441 /* PSz 27 Feb 04
3442 * Do checks even for systems with no HAS_SETREUID.
3443 * We used to swap, then re-swap UIDs with
3444#ifdef HAS_SETREUID
3445 if (setreuid(PL_euid,PL_uid) < 0
3446 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3447 Perl_croak(aTHX_ "Can't swap uid and euid");
3448#endif
3449#ifdef HAS_SETREUID
3450 if (setreuid(PL_uid,PL_euid) < 0
3451 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3452 Perl_croak(aTHX_ "Can't reswap uid and euid");
3453#endif
3454 */
3455
a687059c
LW
3456 /* On this access check to make sure the directories are readable,
3457 * there is actually a small window that the user could use to make
3458 * filename point to an accessible directory. So there is a faint
3459 * chance that someone could execute a setuid script down in a
3460 * non-accessible directory. I don't know what to do about that.
3461 * But I don't think it's too important. The manual lies when
3462 * it says access() is useful in setuid programs.
ae3f3efd
PS
3463 *
3464 * So, access() is pretty useless... but not harmful... do anyway.
a687059c 3465 */
e57400b1 3466 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
ae3f3efd 3467 Perl_croak(aTHX_ "Can't access() script\n");
e57400b1 3468 }
ae3f3efd 3469
a687059c
LW
3470 /* If we can swap euid and uid, then we can determine access rights
3471 * with a simple stat of the file, and then compare device and
3472 * inode to make sure we did stat() on the same file we opened.
3473 * Then we just have to make sure he or she can execute it.
ae3f3efd
PS
3474 *
3475 * PSz 24 Feb 04
3476 * As the script is opened by perl, not suidperl, we do not need to
3477 * care much about access rights.
3478 *
3479 * The 'script changed' check is needed, or we can get lied to
3480 * about $0 with e.g.
3481 * suidperl /dev/fd/4//bin/x 4<setuidscript
3482 * Without HAS_SETREUID, is it safe to stat() as root?
3483 *
3484 * Are there any operating systems that pass /dev/fd/xxx for setuid
3485 * scripts, as suggested/described in perlsec(1)? Surely they do not
3486 * pass the script name as we do, so the "script changed" test would
3487 * fail for them... but we never get here with
3488 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3489 *
3490 * This is one place where we must "lie" about return status: not
3491 * say if the stat() failed. We are doing this as root, and could
3492 * be tricked into reporting existence or not of files that the
3493 * "plain" user cannot even see.
a687059c
LW
3494 */
3495 {
c623ac67 3496 Stat_t tmpstatbuf;
ae3f3efd
PS
3497 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3498 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
b28d0864 3499 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
ae3f3efd 3500 Perl_croak(aTHX_ "Setuid script changed\n");
a687059c 3501 }
ae3f3efd 3502
a687059c 3503 }
ae3f3efd
PS
3504 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3505 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3506
3507 /* PSz 27 Feb 04
3508 * We used to do this check as the "plain" user (after swapping
3509 * UIDs). But the check for nosuid and noexec filesystem is needed,
3510 * and should be done even without HAS_SETREUID. (Maybe those
3511 * operating systems do not have such mount options anyway...)
3512 * Seems safe enough to do as root.
3513 */
3514#if !defined(NO_NOSUID_CHECK)
3515 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3516 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3517 }
3518#endif
a687059c
LW
3519#endif /* IAMSUID */
3520
e57400b1 3521 if (!S_ISREG(PL_statbuf.st_mode)) {
ae3f3efd 3522 Perl_croak(aTHX_ "Setuid script not plain file\n");
e57400b1 3523 }
b28d0864 3524 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3525 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3526 PL_doswitches = FALSE; /* -s is insecure in suid */
ae3f3efd 3527 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
57843af0 3528 CopLINE_inc(PL_curcop);
6b88bc9c 3529 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3530 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3531 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3532 s = SvPV(PL_linestr,n_a)+2;
ae3f3efd
PS
3533 /* PSz 27 Feb 04 */
3534 /* Sanity check on line length */
3535 if (strlen(s) < 1 || strlen(s) > 4000)
3536 Perl_croak(aTHX_ "Very long #! line");
3537 /* Allow more than a single space after #! */
3538 while (isSPACE(*s)) s++;
3539 /* Sanity check on buffer end */
3540 while ((*s) && !isSPACE(*s)) s++;
2d8e6c8d 3541 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
3792a11b
NC
3542 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3543 || s2[-1] == '-')); s2--) ;
ae3f3efd
PS
3544 /* Sanity check on buffer start */
3545 if ( (s2-4 < SvPV(PL_linestr,n_a)+2 || strnNE(s2-4,"perl",4)) &&
3546 (s-9 < SvPV(PL_linestr,n_a)+2 || strnNE(s-9,"perl",4)) )
cea2e8a9 3547 Perl_croak(aTHX_ "Not a perl script");
a687059c 3548 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3549