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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
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21/* PSz 12 Nov 03
22 *
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
26 *
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
32 *
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
38 *
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
42 *
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
45 *
46 * References:
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
55 * CVE candidate:
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
62 *
63Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64School of Mathematics and Statistics University of Sydney 2006 Australia
65 *
66 */
67/* PSz 13 Nov 03
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
70 */
71
72/* PSz 18 Feb 04
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
78 */
79
378cc40b 80#include "EXTERN.h"
864dbfa3 81#define PERL_IN_PERL_C
378cc40b 82#include "perl.h"
e3321bb0 83#include "patchlevel.h" /* for local_patches */
378cc40b 84
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 *
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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;
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158 PL_MemShared = ipMS;
159 PL_MemParse = ipMP;
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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
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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) {
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215 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
216
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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
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224 SvREADONLY_on(&PL_sv_undef);
225 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 226
3280af22 227 sv_setpv(&PL_sv_no,PL_No);
0309f36e
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228 /* value lookup in void context - happens to have the side effect
229 of caching the numeric forms. */
230 SvIV(&PL_sv_no);
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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);
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NIS
237 SvNV(&PL_sv_yes);
238 SvREADONLY_on(&PL_sv_yes);
239 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
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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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247 }
248
8bfdd7d9 249 PL_rs = newSVpvn("\n", 1);
dc92893f 250
cea2e8a9 251 init_stacks();
79072805 252
748a9306 253 init_ids();
3280af22 254 PL_lex_state = LEX_NOTPARSING;
a5f75d66 255
312caa8e 256 JMPENV_BOOTSTRAP;
f86702cc
PP
257 STATUS_ALL_SUCCESS;
258
0672f40e 259 init_i18nl10n(1);
36477c24 260 SET_NUMERIC_STANDARD();
0b5b802d 261
ab821d7f 262#if defined(LOCAL_PATCH_COUNT)
3280af22 263 PL_localpatches = local_patches; /* For possible -v */
ab821d7f
PP
264#endif
265
52853b95
GS
266#ifdef HAVE_INTERP_INTERN
267 sys_intern_init();
268#endif
269
3a1ee7e8 270 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 271
3280af22
NIS
272 PL_fdpid = newAV(); /* for remembering popen pids by fd */
273 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 274 PL_errors = newSVpvn("",0);
48c6b404 275 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
1f483ca1
JH
276 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
277 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
1fcf4c12 278#ifdef USE_ITHREADS
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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
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292 HvSHAREKEYS_off(PL_strtab); /* mandatory */
293 hv_ksplit(PL_strtab, 512);
294
0631ea03
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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;
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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];
ba89bb6e 542 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
35061a7e
DM
543
544 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 545 /* this is PL_reg_curpm, already freed
35061a7e
DM
546 * flag is set in regexec.c:S_regtry
547 */
548 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 549 }
1cc8b4c5
AB
550 else if(SvREPADTMP(resv)) {
551 SvREPADTMP_off(resv);
552 }
35061a7e 553 else {
5f8cb046
DM
554 ReREFCNT_dec(re);
555 }
556 }
557 }
558 SvREFCNT_dec(PL_regex_padav);
559 PL_regex_padav = Nullav;
560 PL_regex_pad = NULL;
561#endif
562
081fc587
AB
563 SvREFCNT_dec((SV*) PL_stashcache);
564 PL_stashcache = NULL;
565
5f05dabc
PP
566 /* loosen bonds of global variables */
567
3280af22
NIS
568 if(PL_rsfp) {
569 (void)PerlIO_close(PL_rsfp);
570 PL_rsfp = Nullfp;
8ebc5c01
PP
571 }
572
573 /* Filters for program text */
3280af22
NIS
574 SvREFCNT_dec(PL_rsfp_filters);
575 PL_rsfp_filters = Nullav;
8ebc5c01
PP
576
577 /* switches */
3280af22
NIS
578 PL_preprocess = FALSE;
579 PL_minus_n = FALSE;
580 PL_minus_p = FALSE;
581 PL_minus_l = FALSE;
582 PL_minus_a = FALSE;
583 PL_minus_F = FALSE;
584 PL_doswitches = FALSE;
599cee73 585 PL_dowarn = G_WARN_OFF;
3280af22
NIS
586 PL_doextract = FALSE;
587 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
588 PL_unsafe = FALSE;
589
590 Safefree(PL_inplace);
591 PL_inplace = Nullch;
a7cb1f99 592 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
593
594 if (PL_e_script) {
595 SvREFCNT_dec(PL_e_script);
596 PL_e_script = Nullsv;
8ebc5c01
PP
597 }
598
bf9cdc68
RG
599 PL_perldb = 0;
600
8ebc5c01
PP
601 /* magical thingies */
602
7889fe52
NIS
603 SvREFCNT_dec(PL_ofs_sv); /* $, */
604 PL_ofs_sv = Nullsv;
5f05dabc 605
7889fe52
NIS
606 SvREFCNT_dec(PL_ors_sv); /* $\ */
607 PL_ors_sv = Nullsv;
8ebc5c01 608
3280af22
NIS
609 SvREFCNT_dec(PL_rs); /* $/ */
610 PL_rs = Nullsv;
dc92893f 611
d33b2eba
GS
612 PL_multiline = 0; /* $* */
613 Safefree(PL_osname); /* $^O */
614 PL_osname = Nullch;
5f05dabc 615
3280af22
NIS
616 SvREFCNT_dec(PL_statname);
617 PL_statname = Nullsv;
618 PL_statgv = Nullgv;
5f05dabc 619
8ebc5c01
PP
620 /* defgv, aka *_ should be taken care of elsewhere */
621
8ebc5c01 622 /* clean up after study() */
3280af22
NIS
623 SvREFCNT_dec(PL_lastscream);
624 PL_lastscream = Nullsv;
625 Safefree(PL_screamfirst);
626 PL_screamfirst = 0;
627 Safefree(PL_screamnext);
628 PL_screamnext = 0;
8ebc5c01 629
7d5ea4e7
GS
630 /* float buffer */
631 Safefree(PL_efloatbuf);
632 PL_efloatbuf = Nullch;
633 PL_efloatsize = 0;
634
8ebc5c01 635 /* startup and shutdown function lists */
3280af22 636 SvREFCNT_dec(PL_beginav);
5a837c8f 637 SvREFCNT_dec(PL_beginav_save);
3280af22 638 SvREFCNT_dec(PL_endav);
7d30b5c4 639 SvREFCNT_dec(PL_checkav);
ece599bd 640 SvREFCNT_dec(PL_checkav_save);
3280af22
NIS
641 SvREFCNT_dec(PL_initav);
642 PL_beginav = Nullav;
5a837c8f 643 PL_beginav_save = Nullav;
3280af22 644 PL_endav = Nullav;
7d30b5c4 645 PL_checkav = Nullav;
ece599bd 646 PL_checkav_save = Nullav;
3280af22 647 PL_initav = Nullav;
5618dfe8 648
8ebc5c01 649 /* shortcuts just get cleared */
3280af22 650 PL_envgv = Nullgv;
3280af22
NIS
651 PL_incgv = Nullgv;
652 PL_hintgv = Nullgv;
653 PL_errgv = Nullgv;
654 PL_argvgv = Nullgv;
655 PL_argvoutgv = Nullgv;
656 PL_stdingv = Nullgv;
bf49b057 657 PL_stderrgv = Nullgv;
3280af22
NIS
658 PL_last_in_gv = Nullgv;
659 PL_replgv = Nullgv;
bf9cdc68
RG
660 PL_DBgv = Nullgv;
661 PL_DBline = Nullgv;
662 PL_DBsub = Nullgv;
663 PL_DBsingle = Nullsv;
664 PL_DBtrace = Nullsv;
665 PL_DBsignal = Nullsv;
666 PL_DBassertion = Nullsv;
667 PL_DBcv = Nullcv;
668 PL_dbargs = Nullav;
5c831c24 669 PL_debstash = Nullhv;
8ebc5c01 670
7a1c5554
GS
671 SvREFCNT_dec(PL_argvout_stack);
672 PL_argvout_stack = Nullav;
8ebc5c01 673
5c831c24
GS
674 SvREFCNT_dec(PL_modglobal);
675 PL_modglobal = Nullhv;
676 SvREFCNT_dec(PL_preambleav);
677 PL_preambleav = Nullav;
678 SvREFCNT_dec(PL_subname);
679 PL_subname = Nullsv;
680 SvREFCNT_dec(PL_linestr);
681 PL_linestr = Nullsv;
682 SvREFCNT_dec(PL_pidstatus);
683 PL_pidstatus = Nullhv;
684 SvREFCNT_dec(PL_toptarget);
685 PL_toptarget = Nullsv;
686 SvREFCNT_dec(PL_bodytarget);
687 PL_bodytarget = Nullsv;
688 PL_formtarget = Nullsv;
689
d33b2eba 690 /* free locale stuff */
b9582b6a 691#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
692 Safefree(PL_collation_name);
693 PL_collation_name = Nullch;
b9582b6a 694#endif
d33b2eba 695
b9582b6a 696#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
697 Safefree(PL_numeric_name);
698 PL_numeric_name = Nullch;
a453c169 699 SvREFCNT_dec(PL_numeric_radix_sv);
bf9cdc68 700 PL_numeric_radix_sv = Nullsv;
b9582b6a 701#endif
d33b2eba 702
5c831c24
GS
703 /* clear utf8 character classes */
704 SvREFCNT_dec(PL_utf8_alnum);
705 SvREFCNT_dec(PL_utf8_alnumc);
706 SvREFCNT_dec(PL_utf8_ascii);
707 SvREFCNT_dec(PL_utf8_alpha);
708 SvREFCNT_dec(PL_utf8_space);
709 SvREFCNT_dec(PL_utf8_cntrl);
710 SvREFCNT_dec(PL_utf8_graph);
711 SvREFCNT_dec(PL_utf8_digit);
712 SvREFCNT_dec(PL_utf8_upper);
713 SvREFCNT_dec(PL_utf8_lower);
714 SvREFCNT_dec(PL_utf8_print);
715 SvREFCNT_dec(PL_utf8_punct);
716 SvREFCNT_dec(PL_utf8_xdigit);
717 SvREFCNT_dec(PL_utf8_mark);
718 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 719 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 720 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 721 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH
722 SvREFCNT_dec(PL_utf8_idstart);
723 SvREFCNT_dec(PL_utf8_idcont);
5c831c24
GS
724 PL_utf8_alnum = Nullsv;
725 PL_utf8_alnumc = Nullsv;
726 PL_utf8_ascii = Nullsv;
727 PL_utf8_alpha = Nullsv;
728 PL_utf8_space = Nullsv;
729 PL_utf8_cntrl = Nullsv;
730 PL_utf8_graph = Nullsv;
731 PL_utf8_digit = Nullsv;
732 PL_utf8_upper = Nullsv;
733 PL_utf8_lower = Nullsv;
734 PL_utf8_print = Nullsv;
735 PL_utf8_punct = Nullsv;
736 PL_utf8_xdigit = Nullsv;
737 PL_utf8_mark = Nullsv;
738 PL_utf8_toupper = Nullsv;
739 PL_utf8_totitle = Nullsv;
740 PL_utf8_tolower = Nullsv;
b4e400f9 741 PL_utf8_tofold = Nullsv;
82686b01
JH
742 PL_utf8_idstart = Nullsv;
743 PL_utf8_idcont = Nullsv;
5c831c24 744
971a9dd3
GS
745 if (!specialWARN(PL_compiling.cop_warnings))
746 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 747 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
748 if (!specialCopIO(PL_compiling.cop_io))
749 SvREFCNT_dec(PL_compiling.cop_io);
750 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS
751 CopFILE_free(&PL_compiling);
752 CopSTASH_free(&PL_compiling);
5c831c24 753
a0d0e21e 754 /* Prepare to destruct main symbol table. */
5f05dabc 755
3280af22
NIS
756 hv = PL_defstash;
757 PL_defstash = 0;
a0d0e21e 758 SvREFCNT_dec(hv);
5c831c24
GS
759 SvREFCNT_dec(PL_curstname);
760 PL_curstname = Nullsv;
a0d0e21e 761
5a844595
GS
762 /* clear queued errors */
763 SvREFCNT_dec(PL_errors);
764 PL_errors = Nullsv;
765
a0d0e21e 766 FREETMPS;
0453d815 767 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 768 if (PL_scopestack_ix != 0)
9014280d 769 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 770 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
771 (long)PL_scopestack_ix);
772 if (PL_savestack_ix != 0)
9014280d 773 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 774 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
775 (long)PL_savestack_ix);
776 if (PL_tmps_floor != -1)
9014280d 777 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 778 (long)PL_tmps_floor + 1);
a0d0e21e 779 if (cxstack_ix != -1)
9014280d 780 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 781 (long)cxstack_ix + 1);
a0d0e21e 782 }
8990e307
LW
783
784 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 785 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 786 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
787
788 /* the 2 is for PL_fdpid and PL_strtab */
789 while (PL_sv_count > 2 && sv_clean_all())
790 ;
791
d33b2eba
GS
792 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
793 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
794 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
795 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 796
d4777f27
GS
797 AvREAL_off(PL_fdpid); /* no surviving entries */
798 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
799 PL_fdpid = Nullav;
800
6c644e78
GS
801#ifdef HAVE_INTERP_INTERN
802 sys_intern_clear();
803#endif
804
6e72f9df
PP
805 /* Destruct the global string table. */
806 {
807 /* Yell and reset the HeVAL() slots that are still holding refcounts,
808 * so that sv_free() won't fail on them.
809 */
810 I32 riter;
811 I32 max;
812 HE *hent;
813 HE **array;
814
815 riter = 0;
3280af22
NIS
816 max = HvMAX(PL_strtab);
817 array = HvARRAY(PL_strtab);
6e72f9df
PP
818 hent = array[0];
819 for (;;) {
0453d815 820 if (hent && ckWARN_d(WARN_INTERNAL)) {
9014280d 821 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 822 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df
PP
823 HeVAL(hent) - Nullsv, HeKEY(hent));
824 HeVAL(hent) = Nullsv;
825 hent = HeNEXT(hent);
826 }
827 if (!hent) {
828 if (++riter > max)
829 break;
830 hent = array[riter];
831 }
832 }
833 }
3280af22 834 SvREFCNT_dec(PL_strtab);
6e72f9df 835
e652bb2f 836#ifdef USE_ITHREADS
a0739874
DM
837 /* free the pointer table used for cloning */
838 ptr_table_free(PL_ptr_table);
bf9cdc68 839 PL_ptr_table = (PTR_TBL_t*)NULL;
53186e96 840#endif
a0739874 841
d33b2eba
GS
842 /* free special SVs */
843
844 SvREFCNT(&PL_sv_yes) = 0;
845 sv_clear(&PL_sv_yes);
846 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 847 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
848
849 SvREFCNT(&PL_sv_no) = 0;
850 sv_clear(&PL_sv_no);
851 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 852 SvFLAGS(&PL_sv_no) = 0;
01724ea0 853
9f375a43
DM
854 {
855 int i;
856 for (i=0; i<=2; i++) {
857 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
858 sv_clear(PERL_DEBUG_PAD(i));
859 SvANY(PERL_DEBUG_PAD(i)) = NULL;
860 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
861 }
862 }
863
0453d815 864 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 865 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 866
eba0f806
DM
867#ifdef DEBUG_LEAKING_SCALARS
868 if (PL_sv_count != 0) {
869 SV* sva;
870 SV* sv;
871 register SV* svend;
872
873 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
874 svend = &sva[SvREFCNT(sva)];
875 for (sv = sva + 1; sv < svend; ++sv) {
876 if (SvTYPE(sv) != SVTYPEMASK) {
a548cda8 877 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
61b61456 878 " flags=0x%"UVxf
fd0854ff
DM
879 " refcnt=%"UVuf pTHX__FORMAT "\n"
880 "\tallocated at %s:%d %s %s%s\n",
881 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
882 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
883 sv->sv_debug_line,
884 sv->sv_debug_inpad ? "for" : "by",
885 sv->sv_debug_optype ?
886 PL_op_name[sv->sv_debug_optype]: "(none)",
887 sv->sv_debug_cloned ? " (cloned)" : ""
888 );
eba0f806
DM
889 }
890 }
891 }
892 }
893#endif
bf9cdc68 894 PL_sv_count = 0;
eba0f806
DM
895
896
56a2bab7 897#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
898 /* No more IO - including error messages ! */
899 PerlIO_cleanup(aTHX);
900#endif
901
9f4bd222
NIS
902 /* sv_undef needs to stay immortal until after PerlIO_cleanup
903 as currently layers use it rather than Nullsv as a marker
904 for no arg - and will try and SvREFCNT_dec it.
905 */
906 SvREFCNT(&PL_sv_undef) = 0;
907 SvREADONLY_off(&PL_sv_undef);
908
3280af22 909 Safefree(PL_origfilename);
bf9cdc68 910 PL_origfilename = Nullch;
3280af22 911 Safefree(PL_reg_start_tmp);
bf9cdc68
RG
912 PL_reg_start_tmp = (char**)NULL;
913 PL_reg_start_tmpl = 0;
5c5e4c24
IZ
914 if (PL_reg_curpm)
915 Safefree(PL_reg_curpm);
82ba1be6 916 Safefree(PL_reg_poscache);
dd28f7bb 917 free_tied_hv_pool();
3280af22 918 Safefree(PL_op_mask);
cf36064f 919 Safefree(PL_psig_ptr);
bf9cdc68 920 PL_psig_ptr = (SV**)NULL;
cf36064f 921 Safefree(PL_psig_name);
bf9cdc68 922 PL_psig_name = (SV**)NULL;
2c2666fc 923 Safefree(PL_bitcount);
bf9cdc68 924 PL_bitcount = Nullch;
ce08f86c 925 Safefree(PL_psig_pend);
bf9cdc68
RG
926 PL_psig_pend = (int*)NULL;
927 PL_formfeed = Nullsv;
928 Safefree(PL_ofmt);
929 PL_ofmt = Nullch;
6e72f9df 930 nuke_stacks();
bf9cdc68
RG
931 PL_tainting = FALSE;
932 PL_taint_warn = FALSE;
3280af22 933 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
bf9cdc68 934 PL_debug = 0;
ac27b0f5 935
a0d0e21e 936 DEBUG_P(debprofdump());
d33b2eba 937
e5dd39fc 938#ifdef USE_REENTRANT_API
10bc17b6 939 Perl_reentrant_free(aTHX);
e5dd39fc
AB
940#endif
941
612f20c3
GS
942 sv_free_arenas();
943
fc36a67e
PP
944 /* As the absolutely last thing, free the non-arena SV for mess() */
945
3280af22 946 if (PL_mess_sv) {
f350b448
NC
947 /* we know that type == SVt_PVMG */
948
9c63abab 949 /* it could have accumulated taint magic */
f350b448
NC
950 MAGIC* mg;
951 MAGIC* moremagic;
952 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
953 moremagic = mg->mg_moremagic;
954 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
955 && mg->mg_len >= 0)
956 Safefree(mg->mg_ptr);
957 Safefree(mg);
9c63abab 958 }
f350b448 959
fc36a67e 960 /* we know that type >= SVt_PV */
8bd4d4c5 961 SvPV_free(PL_mess_sv);
3280af22
NIS
962 Safefree(SvANY(PL_mess_sv));
963 Safefree(PL_mess_sv);
964 PL_mess_sv = Nullsv;
fc36a67e 965 }
31d77e54 966 return STATUS_NATIVE_EXPORT;
79072805
LW
967}
968
954c1994
GS
969/*
970=for apidoc perl_free
971
972Releases a Perl interpreter. See L<perlembed>.
973
974=cut
975*/
976
79072805 977void
0cb96387 978perl_free(pTHXx)
79072805 979{
acfe0abc 980#if defined(WIN32) || defined(NETWARE)
ce3e5b80 981# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
982# ifdef NETWARE
983 void *host = nw_internal_host;
984# else
985 void *host = w32_internal_host;
986# endif
ce3e5b80 987 PerlMem_free(aTHXx);
acfe0abc 988# ifdef NETWARE
011f1a1a 989 nw_delete_internal_host(host);
acfe0abc
GS
990# else
991 win32_delete_internal_host(host);
992# endif
1c0ca838
GS
993# else
994 PerlMem_free(aTHXx);
995# endif
acfe0abc
GS
996#else
997 PerlMem_free(aTHXx);
76e3520e 998#endif
79072805
LW
999}
1000
aebd1ac7
GA
1001#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1002/* provide destructors to clean up the thread key when libperl is unloaded */
1003#ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1004
1005#if defined(__hpux) && !defined(__GNUC__)
1006#pragma fini "perl_fini"
1007#endif
1008
1009#if defined(__GNUC__) && defined(__attribute__)
1010/* want to make sure __attribute__ works here even
1011 * for -Dd_attribut=undef builds.
1012 */
1013#undef __attribute__
1014#endif
1015
1016static void __attribute__((destructor))
de009b76 1017perl_fini(void)
aebd1ac7 1018{
27da23d5 1019 dVAR;
aebd1ac7
GA
1020 if (PL_curinterp)
1021 FREE_THREAD_KEY;
1022}
1023
1024#endif /* WIN32 */
1025#endif /* THREADS */
1026
4b556e6c 1027void
864dbfa3 1028Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 1029{
3280af22
NIS
1030 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1031 PL_exitlist[PL_exitlistlen].fn = fn;
1032 PL_exitlist[PL_exitlistlen].ptr = ptr;
1033 ++PL_exitlistlen;
4b556e6c
JD
1034}
1035
56cf6df8
RGS
1036#ifdef HAS_PROCSELFEXE
1037/* This is a function so that we don't hold on to MAXPATHLEN
1038 bytes of stack longer than necessary
1039 */
1040STATIC void
e1ec3a88 1041S_procself_val(pTHX_ SV *sv, const char *arg0)
56cf6df8
RGS
1042{
1043 char buf[MAXPATHLEN];
1044 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1045
1046 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1047 includes a spurious NUL which will cause $^X to fail in system
1048 or backticks (this will prevent extensions from being built and
1049 many tests from working). readlink is not meant to add a NUL.
1050 Normal readlink works fine.
1051 */
1052 if (len > 0 && buf[len-1] == '\0') {
1053 len--;
1054 }
1055
1056 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1057 returning the text "unknown" from the readlink rather than the path
1058 to the executable (or returning an error from the readlink). Any valid
1059 path has a '/' in it somewhere, so use that to validate the result.
1060 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1061 */
1062 if (len > 0 && memchr(buf, '/', len)) {
1063 sv_setpvn(sv,buf,len);
1064 }
1065 else {
1066 sv_setpv(sv,arg0);
1067 }
1068}
1069#endif /* HAS_PROCSELFEXE */
b7975bdd
NC
1070
1071STATIC void
1072S_set_caret_X(pTHX) {
1073 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1074 if (tmpgv) {
1075#ifdef HAS_PROCSELFEXE
1076 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1077#else
1078#ifdef OS2
1079 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
1080#else
1081 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
1082#endif
1083#endif
1084 }
1085}
1086
954c1994
GS
1087/*
1088=for apidoc perl_parse
1089
1090Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1091
1092=cut
1093*/
1094
79072805 1095int
0cb96387 1096perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 1097{
27da23d5 1098 dVAR;
6224f72b 1099 I32 oldscope;
6224f72b 1100 int ret;
db36c5a1 1101 dJMPENV;
8d063cd8 1102
a687059c
LW
1103#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1104#ifdef IAMSUID
1105#undef IAMSUID
cea2e8a9 1106 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c 1107setuid perl scripts securely.\n");
ae3f3efd 1108#endif /* IAMSUID */
a687059c
LW
1109#endif
1110
b0891165
JH
1111#if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1112 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
103dd899 1113 * This MUST be done before any hash stores or fetches take place.
008fb0c0
NC
1114 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1115 * yourself, it is your responsibility to provide a good random seed!
830b38bd 1116 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
008fb0c0
NC
1117 if (!PL_rehash_seed_set)
1118 PL_rehash_seed = get_hash_seed();
b0891165 1119 {
bed60192
JH
1120 char *s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1121
1122 if (s) {
1123 int i = atoi(s);
1124
1125 if (i == 1)
1126 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n",
008fb0c0 1127 PL_rehash_seed);
bed60192 1128 }
b0891165
JH
1129 }
1130#endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1131
3280af22 1132 PL_origargc = argc;
e2975953 1133 PL_origargv = argv;
a0d0e21e 1134
54bfe034 1135 {
3cb9023d
JH
1136 /* Set PL_origalen be the sum of the contiguous argv[]
1137 * elements plus the size of the env in case that it is
e9137a8e 1138 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
3cb9023d
JH
1139 * as the maximum modifiable length of $0. In the worst case
1140 * the area we are able to modify is limited to the size of
43c32782 1141 * the original argv[0]. (See below for 'contiguous', though.)
3cb9023d 1142 * --jhi */
e1ec3a88 1143 const char *s = NULL;
54bfe034 1144 int i;
7d8e7db3
JH
1145 UV mask =
1146 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
43c32782
JH
1147 /* Do the mask check only if the args seem like aligned. */
1148 UV aligned =
1149 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1150
1151 /* See if all the arguments are contiguous in memory. Note
1152 * that 'contiguous' is a loose term because some platforms
1153 * align the argv[] and the envp[]. If the arguments look
1154 * like non-aligned, assume that they are 'strictly' or
1155 * 'traditionally' contiguous. If the arguments look like
1156 * aligned, we just check that they are within aligned
1157 * PTRSIZE bytes. As long as no system has something bizarre
1158 * like the argv[] interleaved with some other data, we are
1159 * fine. (Did I just evoke Murphy's Law?) --jhi */
c8941eeb
JH
1160 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1161 while (*s) s++;
1162 for (i = 1; i < PL_origargc; i++) {
1163 if ((PL_origargv[i] == s + 1
43c32782 1164#ifdef OS2
c8941eeb 1165 || PL_origargv[i] == s + 2
43c32782 1166#endif
c8941eeb
JH
1167 )
1168 ||
1169 (aligned &&
1170 (PL_origargv[i] > s &&
1171 PL_origargv[i] <=
1172 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1173 )
1174 {
1175 s = PL_origargv[i];
1176 while (*s) s++;
1177 }
1178 else
1179 break;
54bfe034 1180 }
54bfe034 1181 }
3cb9023d 1182 /* Can we grab env area too to be used as the area for $0? */
43c32782
JH
1183 if (PL_origenviron) {
1184 if ((PL_origenviron[0] == s + 1
1185#ifdef OS2
1186 || (PL_origenviron[0] == s + 9 && (s += 8))
1187#endif
1188 )
1189 ||
1190 (aligned &&
1191 (PL_origenviron[0] > s &&
1192 PL_origenviron[0] <=
1193 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1194 )
1195 {
1196#ifndef OS2
1197 s = PL_origenviron[0];
1198 while (*s) s++;
1199#endif
1200 my_setenv("NoNe SuCh", Nullch);
1201 /* Force copy of environment. */
1202 for (i = 1; PL_origenviron[i]; i++) {
1203 if (PL_origenviron[i] == s + 1
1204 ||
1205 (aligned &&
1206 (PL_origenviron[i] > s &&
1207 PL_origenviron[i] <=
1208 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1209 )
1210 {
1211 s = PL_origenviron[i];
1212 while (*s) s++;
1213 }
1214 else
1215 break;
54bfe034 1216 }
43c32782 1217 }
54bfe034 1218 }
284e1220 1219 PL_origalen = s - PL_origargv[0] + 1;
54bfe034
JH
1220 }
1221
3280af22 1222 if (PL_do_undump) {
a0d0e21e
LW
1223
1224 /* Come here if running an undumped a.out. */
1225
3280af22
NIS
1226 PL_origfilename = savepv(argv[0]);
1227 PL_do_undump = FALSE;
a0d0e21e 1228 cxstack_ix = -1; /* start label stack again */
748a9306 1229 init_ids();
b7975bdd
NC
1230 assert (!PL_tainted);
1231 TAINT;
1232 S_set_caret_X(aTHX);
1233 TAINT_NOT;
a0d0e21e
LW
1234 init_postdump_symbols(argc,argv,env);
1235 return 0;
1236 }
1237
3280af22 1238 if (PL_main_root) {
3280af22
NIS
1239 op_free(PL_main_root);
1240 PL_main_root = Nullop;
ff0cee69 1241 }
3280af22
NIS
1242 PL_main_start = Nullop;
1243 SvREFCNT_dec(PL_main_cv);
1244 PL_main_cv = Nullcv;
79072805 1245
3280af22
NIS
1246 time(&PL_basetime);
1247 oldscope = PL_scopestack_ix;
599cee73 1248 PL_dowarn = G_WARN_OFF;
f86702cc 1249
14dd3ad8 1250 JMPENV_PUSH(ret);
6224f72b 1251 switch (ret) {
312caa8e 1252 case 0:
14dd3ad8 1253 parse_body(env,xsinit);
7d30b5c4
GS
1254 if (PL_checkav)
1255 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1256 ret = 0;
1257 break;
6224f72b
GS
1258 case 1:
1259 STATUS_ALL_FAILURE;
1260 /* FALL THROUGH */
1261 case 2:
1262 /* my_exit() was called */
3280af22 1263 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1264 LEAVE;
1265 FREETMPS;
3280af22 1266 PL_curstash = PL_defstash;
7d30b5c4
GS
1267 if (PL_checkav)
1268 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1269 ret = STATUS_NATIVE_EXPORT;
1270 break;
6224f72b 1271 case 3:
bf49b057 1272 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1273 ret = 1;
1274 break;
6224f72b 1275 }
14dd3ad8
GS
1276 JMPENV_POP;
1277 return ret;
1278}
1279
312caa8e 1280STATIC void *
14dd3ad8 1281S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1282{
27da23d5 1283 dVAR;
312caa8e 1284 int argc = PL_origargc;
8f42b153 1285 char **argv = PL_origargv;
e1ec3a88 1286 const char *scriptname = NULL;
312caa8e 1287 VOL bool dosearch = FALSE;
e1ec3a88 1288 const char *validarg = "";
312caa8e
CS
1289 register SV *sv;
1290 register char *s;
e1ec3a88 1291 const char *cddir = Nullch;
20ef40cf 1292 bool minus_f = FALSE;
312caa8e 1293
ae3f3efd
PS
1294 PL_fdscript = -1;
1295 PL_suidscript = -1;
3280af22 1296 sv_setpvn(PL_linestr,"",0);
79cb57f6 1297 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1298 SAVEFREESV(sv);
1299 init_main_stash();
54310121 1300
6224f72b
GS
1301 for (argc--,argv++; argc > 0; argc--,argv++) {
1302 if (argv[0][0] != '-' || !argv[0][1])
1303 break;
1304#ifdef DOSUID
1305 if (*validarg)
1306 validarg = " PHOOEY ";
1307 else
1308 validarg = argv[0];
ae3f3efd
PS
1309 /*
1310 * Can we rely on the kernel to start scripts with argv[1] set to
1311 * contain all #! line switches (the whole line)? (argv[0] is set to
1312 * the interpreter name, argv[2] to the script name; argv[3] and
1313 * above may contain other arguments.)
1314 */
13281fa4 1315#endif
6224f72b
GS
1316 s = argv[0]+1;
1317 reswitch:
1318 switch (*s) {
729a02f2 1319 case 'C':
1d5472a9
GS
1320#ifndef PERL_STRICT_CR
1321 case '\r':
1322#endif
6224f72b
GS
1323 case ' ':
1324 case '0':
1325 case 'F':
1326 case 'a':
1327 case 'c':
1328 case 'd':
1329 case 'D':
1330 case 'h':
1331 case 'i':
1332 case 'l':
1333 case 'M':
1334 case 'm':
1335 case 'n':
1336 case 'p':
1337 case 's':
1338 case 'u':
1339 case 'U':
1340 case 'v':
599cee73
PM
1341 case 'W':
1342 case 'X':
6224f72b 1343 case 'w':
06492da6 1344 case 'A':
155aba94 1345 if ((s = moreswitches(s)))
6224f72b
GS
1346 goto reswitch;
1347 break;
33b78306 1348
1dbad523 1349 case 't':
22f7c9c9 1350 CHECK_MALLOC_TOO_LATE_FOR('t');
317ea90d
MS
1351 if( !PL_tainting ) {
1352 PL_taint_warn = TRUE;
1353 PL_tainting = TRUE;
1354 }
1355 s++;
1356 goto reswitch;
6224f72b 1357 case 'T':
22f7c9c9 1358 CHECK_MALLOC_TOO_LATE_FOR('T');
3280af22 1359 PL_tainting = TRUE;
317ea90d 1360 PL_taint_warn = FALSE;
6224f72b
GS
1361 s++;
1362 goto reswitch;
f86702cc 1363
6224f72b 1364 case 'e':
bf4acbe4
GS
1365#ifdef MACOS_TRADITIONAL
1366 /* ignore -e for Dev:Pseudo argument */
1367 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
e55ac0fa 1368 break;
bf4acbe4 1369#endif
ae3f3efd 1370 forbid_setid("-e");
3280af22 1371 if (!PL_e_script) {
79cb57f6 1372 PL_e_script = newSVpvn("",0);
0cb96387 1373 filter_add(read_e_script, NULL);
6224f72b
GS
1374 }
1375 if (*++s)
3280af22 1376 sv_catpv(PL_e_script, s);
6224f72b 1377 else if (argv[1]) {
3280af22 1378 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1379 argc--,argv++;
1380 }
1381 else
cea2e8a9 1382 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1383 sv_catpv(PL_e_script, "\n");
6224f72b 1384 break;
afe37c7d 1385
20ef40cf
GA
1386 case 'f':
1387 minus_f = TRUE;
1388 s++;
1389 goto reswitch;
1390
6224f72b
GS
1391 case 'I': /* -I handled both here and in moreswitches() */
1392 forbid_setid("-I");
1393 if (!*++s && (s=argv[1]) != Nullch) {
1394 argc--,argv++;
1395 }
6224f72b 1396 if (s && *s) {
0df16ed7
GS
1397 char *p;
1398 STRLEN len = strlen(s);
1399 p = savepvn(s, len);
88fe16b2 1400 incpush(p, TRUE, TRUE, FALSE, FALSE);
0df16ed7
GS
1401 sv_catpvn(sv, "-I", 2);
1402 sv_catpvn(sv, p, len);
1403 sv_catpvn(sv, " ", 1);
6224f72b 1404 Safefree(p);
0df16ed7
GS
1405 }
1406 else
a67e862a 1407 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1408 break;
1409 case 'P':
1410 forbid_setid("-P");
3280af22 1411 PL_preprocess = TRUE;
6224f72b
GS
1412 s++;
1413 goto reswitch;
1414 case 'S':
1415 forbid_setid("-S");
1416 dosearch = TRUE;
1417 s++;
1418 goto reswitch;
1419 case 'V':
3280af22
NIS
1420 if (!PL_preambleav)
1421 PL_preambleav = newAV();
1422 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
6224f72b 1423 if (*++s != ':') {
efcaa95b
YST
1424 STRLEN opts;
1425
3280af22 1426 PL_Sv = newSVpv("print myconfig();",0);
6224f72b 1427#ifdef VMS
6b88bc9c 1428 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1429#else
3280af22 1430 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1431#endif
efcaa95b
YST
1432 opts = SvCUR(PL_Sv);
1433
3280af22 1434 sv_catpv(PL_Sv,"\" Compile-time options:");
6224f72b 1435# ifdef DEBUGGING
3280af22 1436 sv_catpv(PL_Sv," DEBUGGING");
6224f72b 1437# endif
6224f72b 1438# ifdef MULTIPLICITY
8f872242 1439 sv_catpv(PL_Sv," MULTIPLICITY");
6224f72b 1440# endif
4d1ff10f
AB
1441# ifdef USE_5005THREADS
1442 sv_catpv(PL_Sv," USE_5005THREADS");
b363f7ed 1443# endif
ac5e8965
JH
1444# ifdef USE_ITHREADS
1445 sv_catpv(PL_Sv," USE_ITHREADS");
1446# endif
10cc9d2a
JH
1447# ifdef USE_64_BIT_INT
1448 sv_catpv(PL_Sv," USE_64_BIT_INT");
1449# endif
1450# ifdef USE_64_BIT_ALL
1451 sv_catpv(PL_Sv," USE_64_BIT_ALL");
ac5e8965
JH
1452# endif
1453# ifdef USE_LONG_DOUBLE
1454 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1455# endif
53430762
JH
1456# ifdef USE_LARGE_FILES
1457 sv_catpv(PL_Sv," USE_LARGE_FILES");
1458# endif
ac5e8965
JH
1459# ifdef USE_SOCKS
1460 sv_catpv(PL_Sv," USE_SOCKS");
1461# endif
20ef40cf
GA
1462# ifdef USE_SITECUSTOMIZE
1463 sv_catpv(PL_Sv," USE_SITECUSTOMIZE");
1464# endif
b363f7ed
GS
1465# ifdef PERL_IMPLICIT_CONTEXT
1466 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1467# endif
1468# ifdef PERL_IMPLICIT_SYS
1469 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1470# endif
efcaa95b
YST
1471
1472 while (SvCUR(PL_Sv) > opts+76) {
1473 /* find last space after "options: " and before col 76 */
1474
dd374669
AL
1475 const char *space;
1476 char *pv = SvPV_nolen(PL_Sv);
1477 const char c = pv[opts+76];
efcaa95b
YST
1478 pv[opts+76] = '\0';
1479 space = strrchr(pv+opts+26, ' ');
1480 pv[opts+76] = c;
1481 if (!space) break; /* "Can't happen" */
1482
1483 /* break the line before that space */
1484
1485 opts = space - pv;
1486 sv_insert(PL_Sv, opts, 0,
1487 "\\n ", 25);
1488 }
1489
3280af22 1490 sv_catpv(PL_Sv,"\\n\",");
b363f7ed 1491
6224f72b
GS
1492#if defined(LOCAL_PATCH_COUNT)
1493 if (LOCAL_PATCH_COUNT > 0) {
1494 int i;
3280af22 1495 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
6224f72b 1496 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
3280af22 1497 if (PL_localpatches[i])
acb03d05
AB
1498 Perl_sv_catpvf(aTHX_ PL_Sv,"q%c\t%s\n%c,",
1499 0, PL_localpatches[i], 0);
6224f72b
GS
1500 }
1501 }
1502#endif
cea2e8a9 1503 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1504#ifdef __DATE__
1505# ifdef __TIME__
cea2e8a9 1506 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
6224f72b 1507# else
cea2e8a9 1508 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
6224f72b
GS
1509# endif
1510#endif
3280af22 1511 sv_catpv(PL_Sv, "; \
6224f72b 1512$\"=\"\\n \"; \
69fcd688
JH
1513@env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1514#ifdef __CYGWIN__
1515 sv_catpv(PL_Sv,"\
1516push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1517#endif
1518 sv_catpv(PL_Sv, "\
6224f72b
GS
1519print \" \\%ENV:\\n @env\\n\" if @env; \
1520print \" \\@INC:\\n @INC\\n\";");
1521 }
1522 else {
3280af22
NIS
1523 PL_Sv = newSVpv("config_vars(qw(",0);
1524 sv_catpv(PL_Sv, ++s);
1525 sv_catpv(PL_Sv, "))");
6224f72b
GS
1526 s += strlen(s);
1527 }
3280af22 1528 av_push(PL_preambleav, PL_Sv);
6224f72b
GS
1529 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1530 goto reswitch;
1531 case 'x':
3280af22 1532 PL_doextract = TRUE;
6224f72b
GS
1533 s++;
1534 if (*s)
f4c556ac 1535 cddir = s;
6224f72b
GS
1536 break;
1537 case 0:
1538 break;
1539 case '-':
1540 if (!*++s || isSPACE(*s)) {
1541 argc--,argv++;
1542 goto switch_end;
1543 }
1544 /* catch use of gnu style long options */
1545 if (strEQ(s, "version")) {
dd374669 1546 s = (char *)"v";
6224f72b
GS
1547 goto reswitch;
1548 }
1549 if (strEQ(s, "help")) {
dd374669 1550 s = (char *)"h";
6224f72b
GS
1551 goto reswitch;
1552 }
1553 s--;
1554 /* FALL THROUGH */
1555 default:
cea2e8a9 1556 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1557 }
1558 }
6224f72b 1559 switch_end:
54310121 1560
f675dbe5
CB
1561 if (
1562#ifndef SECURE_INTERNAL_GETENV
1563 !PL_tainting &&
1564#endif
cf756827 1565 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1566 {
e1ec3a88 1567 const char *popt = s;
74288ac8
GS
1568 while (isSPACE(*s))
1569 s++;
317ea90d 1570 if (*s == '-' && *(s+1) == 'T') {
22f7c9c9 1571 CHECK_MALLOC_TOO_LATE_FOR('T');
74288ac8 1572 PL_tainting = TRUE;
317ea90d
MS
1573 PL_taint_warn = FALSE;
1574 }
74288ac8 1575 else {
cf756827 1576 char *popt_copy = Nullch;
74288ac8 1577 while (s && *s) {
4ea8f8fb 1578 char *d;
74288ac8
GS
1579 while (isSPACE(*s))
1580 s++;
1581 if (*s == '-') {
1582 s++;
1583 if (isSPACE(*s))
1584 continue;
1585 }
4ea8f8fb 1586 d = s;
74288ac8
GS
1587 if (!*s)
1588 break;
06492da6 1589 if (!strchr("DIMUdmtwA", *s))
cea2e8a9 1590 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1591 while (++s && *s) {
1592 if (isSPACE(*s)) {
cf756827
GS
1593 if (!popt_copy) {
1594 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1595 s = popt_copy + (s - popt);
1596 d = popt_copy + (d - popt);
1597 }
4ea8f8fb
MS
1598 *s++ = '\0';
1599 break;
1600 }
1601 }
1c4db469 1602 if (*d == 't') {
317ea90d
MS
1603 if( !PL_tainting ) {
1604 PL_taint_warn = TRUE;
1605 PL_tainting = TRUE;
1606 }
1c4db469
RGS
1607 } else {
1608 moreswitches(d);
1609 }
6224f72b 1610 }
6224f72b
GS
1611 }
1612 }
a0d0e21e 1613
20ef40cf
GA
1614#ifdef USE_SITECUSTOMIZE
1615 if (!minus_f) {
1616 if (!PL_preambleav)
1617 PL_preambleav = newAV();
1618 av_unshift(PL_preambleav, 1);
1619 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1620 }
1621#endif
1622
317ea90d
MS
1623 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1624 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1625 }
1626
6224f72b
GS
1627 if (!scriptname)
1628 scriptname = argv[0];
3280af22 1629 if (PL_e_script) {
6224f72b
GS
1630 argc++,argv--;
1631 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1632 }
1633 else if (scriptname == Nullch) {
1634#ifdef MSDOS
1635 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1636 moreswitches("h");
1637#endif
1638 scriptname = "-";
1639 }
1640
b7975bdd
NC
1641 /* Set $^X early so that it can be used for relocatable paths in @INC */
1642 assert (!PL_tainted);
1643 TAINT;
1644 S_set_caret_X(aTHX);
1645 TAINT_NOT;
6224f72b
GS
1646 init_perllib();
1647
c5cccb17 1648 open_script(scriptname,dosearch,sv);
6224f72b 1649
c5cccb17 1650 validate_suid(validarg, scriptname);
6224f72b 1651
64ca3a65 1652#ifndef PERL_MICRO
0b5b802d
GS
1653#if defined(SIGCHLD) || defined(SIGCLD)
1654 {
1655#ifndef SIGCHLD
1656# define SIGCHLD SIGCLD
1657#endif
1658 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1659 if (sigstate == SIG_IGN) {
1660 if (ckWARN(WARN_SIGNAL))
9014280d 1661 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
0b5b802d
GS
1662 "Can't ignore signal CHLD, forcing to default");
1663 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1664 }
1665 }
1666#endif
64ca3a65 1667#endif
0b5b802d 1668
bf4acbe4
GS
1669#ifdef MACOS_TRADITIONAL
1670 if (PL_doextract || gMacPerl_AlwaysExtract) {
1671#else
f4c556ac 1672 if (PL_doextract) {
bf4acbe4 1673#endif
6224f72b 1674 find_beginning();
dd374669 1675 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
f4c556ac
GS
1676 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1677
1678 }
6224f72b 1679
3280af22
NIS
1680 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1681 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1682 CvUNIQUE_on(PL_compcv);
1683
dd2155a4 1684 CvPADLIST(PL_compcv) = pad_new(0);
4d1ff10f 1685#ifdef USE_5005THREADS
533c011a
NIS
1686 CvOWNER(PL_compcv) = 0;
1687 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1688 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 1689#endif /* USE_5005THREADS */
6224f72b 1690
0c4f7ff0 1691 boot_core_PerlIO();
6224f72b 1692 boot_core_UNIVERSAL();
09bef843 1693 boot_core_xsutils();
6224f72b
GS
1694
1695 if (xsinit)
acfe0abc 1696 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 1697#ifndef PERL_MICRO
ed79a026 1698#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 1699 init_os_extras();
6224f72b 1700#endif
64ca3a65 1701#endif
6224f72b 1702
29209bc5 1703#ifdef USE_SOCKS
1b9c9cf5
DH
1704# ifdef HAS_SOCKS5_INIT
1705 socks5_init(argv[0]);
1706# else
29209bc5 1707 SOCKSinit(argv[0]);
1b9c9cf5 1708# endif
ac27b0f5 1709#endif
29209bc5 1710
6224f72b
GS
1711 init_predump_symbols();
1712 /* init_postdump_symbols not currently designed to be called */
1713 /* more than once (ENV isn't cleared first, for example) */
1714 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 1715 if (!PL_do_undump)
6224f72b
GS
1716 init_postdump_symbols(argc,argv,env);
1717
27da23d5
JH
1718 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
1719 * or explicitly in some platforms.
085a54d9 1720 * locale.c:Perl_init_i18nl10n() if the environment
a05d7ebb 1721 * look like the user wants to use UTF-8. */
27da23d5
JH
1722#if defined(SYMBIAN)
1723 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
1724#endif
06e66572
JH
1725 if (PL_unicode) {
1726 /* Requires init_predump_symbols(). */
a05d7ebb 1727 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
06e66572
JH
1728 IO* io;
1729 PerlIO* fp;
1730 SV* sv;
1731
a05d7ebb 1732 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
06e66572 1733 * and the default open disciplines. */
a05d7ebb
JH
1734 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
1735 PL_stdingv && (io = GvIO(PL_stdingv)) &&
1736 (fp = IoIFP(io)))
1737 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1738 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
1739 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
1740 (fp = IoOFP(io)))
1741 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1742 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
1743 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
1744 (fp = IoOFP(io)))
1745 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1746 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
1747 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1748 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
1749 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
1750 if (in) {
1751 if (out)
1752 sv_setpvn(sv, ":utf8\0:utf8", 11);
1753 else
1754 sv_setpvn(sv, ":utf8\0", 6);
1755 }
1756 else if (out)
1757 sv_setpvn(sv, "\0:utf8", 6);
1758 SvSETMAGIC(sv);
1759 }
b310b053
JH
1760 }
1761 }
1762
4ffa73a3
JH
1763 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
1764 if (strEQ(s, "unsafe"))
1765 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
1766 else if (strEQ(s, "safe"))
1767 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
1768 else
1769 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
1770 }
1771
6224f72b
GS
1772 init_lexer();
1773
1774 /* now parse the script */
1775
93189314 1776 SETERRNO(0,SS_NORMAL);
3280af22 1777 PL_error_count = 0;
bf4acbe4
GS
1778#ifdef MACOS_TRADITIONAL
1779 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1780 if (PL_minus_c)
1781 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1782 else {
1783 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1784 MacPerl_MPWFileName(PL_origfilename));
1785 }
1786 }
1787#else
3280af22
NIS
1788 if (yyparse() || PL_error_count) {
1789 if (PL_minus_c)
cea2e8a9 1790 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 1791 else {
cea2e8a9 1792 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 1793 PL_origfilename);
6224f72b
GS
1794 }
1795 }
bf4acbe4 1796#endif
57843af0 1797 CopLINE_set(PL_curcop, 0);
3280af22
NIS
1798 PL_curstash = PL_defstash;
1799 PL_preprocess = FALSE;
1800 if (PL_e_script) {
1801 SvREFCNT_dec(PL_e_script);
1802 PL_e_script = Nullsv;
6224f72b
GS
1803 }
1804
3280af22 1805 if (PL_do_undump)
6224f72b
GS
1806 my_unexec();
1807
57843af0
GS
1808 if (isWARN_ONCE) {
1809 SAVECOPFILE(PL_curcop);
1810 SAVECOPLINE(PL_curcop);
3280af22 1811 gv_check(PL_defstash);
57843af0 1812 }
6224f72b
GS
1813
1814 LEAVE;
1815 FREETMPS;
1816
1817#ifdef MYMALLOC
1818 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1819 dump_mstats("after compilation:");
1820#endif
1821
1822 ENTER;
3280af22 1823 PL_restartop = 0;
312caa8e 1824 return NULL;
6224f72b
GS
1825}
1826
954c1994
GS
1827/*
1828=for apidoc perl_run
1829
1830Tells a Perl interpreter to run. See L<perlembed>.
1831
1832=cut
1833*/
1834
6224f72b 1835int
0cb96387 1836perl_run(pTHXx)
6224f72b 1837{
6224f72b 1838 I32 oldscope;
14dd3ad8 1839 int ret = 0;
db36c5a1 1840 dJMPENV;
6224f72b 1841
3280af22 1842 oldscope = PL_scopestack_ix;
96e176bf
CL
1843#ifdef VMS
1844 VMSISH_HUSHED = 0;
1845#endif
6224f72b 1846
14dd3ad8 1847 JMPENV_PUSH(ret);
6224f72b
GS
1848 switch (ret) {
1849 case 1:
1850 cxstack_ix = -1; /* start context stack again */
312caa8e 1851 goto redo_body;
14dd3ad8 1852 case 0: /* normal completion */
14dd3ad8
GS
1853 redo_body:
1854 run_body(oldscope);
14dd3ad8
GS
1855 /* FALL THROUGH */
1856 case 2: /* my_exit() */
3280af22 1857 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1858 LEAVE;
1859 FREETMPS;
3280af22 1860 PL_curstash = PL_defstash;
3a1ee7e8 1861 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
1862 PL_endav && !PL_minus_c)
1863 call_list(oldscope, PL_endav);
6224f72b
GS
1864#ifdef MYMALLOC
1865 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1866 dump_mstats("after execution: ");
1867#endif
14dd3ad8
GS
1868 ret = STATUS_NATIVE_EXPORT;
1869 break;
6224f72b 1870 case 3:
312caa8e
CS
1871 if (PL_restartop) {
1872 POPSTACK_TO(PL_mainstack);
1873 goto redo_body;
6224f72b 1874 }
bf49b057 1875 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 1876 FREETMPS;
14dd3ad8
GS
1877 ret = 1;
1878 break;
6224f72b
GS
1879 }
1880
14dd3ad8
GS
1881 JMPENV_POP;
1882 return ret;
312caa8e
CS
1883}
1884
14dd3ad8 1885
dd374669 1886STATIC void
14dd3ad8
GS
1887S_run_body(pTHX_ I32 oldscope)
1888{
6224f72b 1889 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 1890 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 1891
3280af22 1892 if (!PL_restartop) {
6224f72b 1893 DEBUG_x(dump_all());
ecae49c0
NC
1894 if (!DEBUG_q_TEST)
1895 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
1896 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1897 PTR2UV(thr)));
6224f72b 1898
3280af22 1899 if (PL_minus_c) {
bf4acbe4 1900#ifdef MACOS_TRADITIONAL
e69a2255
JH
1901 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
1902 (gMacPerl_ErrorFormat ? "# " : ""),
1903 MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 1904#else
bf49b057 1905 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 1906#endif
6224f72b
GS
1907 my_exit(0);
1908 }
3280af22 1909 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 1910 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
1911 if (PL_initav)
1912 call_list(oldscope, PL_initav);
6224f72b
GS
1913 }
1914
1915 /* do it */
1916
3280af22 1917 if (PL_restartop) {
533c011a 1918 PL_op = PL_restartop;
3280af22 1919 PL_restartop = 0;
cea2e8a9 1920 CALLRUNOPS(aTHX);
6224f72b 1921 }
3280af22
NIS
1922 else if (PL_main_start) {
1923 CvDEPTH(PL_main_cv) = 1;
533c011a 1924 PL_op = PL_main_start;
cea2e8a9 1925 CALLRUNOPS(aTHX);
6224f72b 1926 }
f6b3007c
JH
1927 my_exit(0);
1928 /* NOTREACHED */
6224f72b
GS
1929}
1930
954c1994 1931/*
ccfc67b7
JH
1932=head1 SV Manipulation Functions
1933
954c1994
GS
1934=for apidoc p||get_sv
1935
1936Returns the SV of the specified Perl scalar. If C<create> is set and the
1937Perl variable does not exist then it will be created. If C<create> is not
1938set and the variable does not exist then NULL is returned.
1939
1940=cut
1941*/
1942
6224f72b 1943SV*
864dbfa3 1944Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
1945{
1946 GV *gv;
4d1ff10f 1947#ifdef USE_5005THREADS
6224f72b
GS
1948 if (name[1] == '\0' && !isALPHA(name[0])) {
1949 PADOFFSET tmp = find_threadsv(name);
411caa50 1950 if (tmp != NOT_IN_PAD)
6224f72b 1951 return THREADSV(tmp);
6224f72b 1952 }
4d1ff10f 1953#endif /* USE_5005THREADS */
6224f72b
GS
1954 gv = gv_fetchpv(name, create, SVt_PV);
1955 if (gv)
1956 return GvSV(gv);
1957 return Nullsv;
1958}
1959
954c1994 1960/*
ccfc67b7
JH
1961=head1 Array Manipulation Functions
1962
954c1994
GS
1963=for apidoc p||get_av
1964
1965Returns the AV of the specified Perl array. If C<create> is set and the
1966Perl variable does not exist then it will be created. If C<create> is not
1967set and the variable does not exist then NULL is returned.
1968
1969=cut
1970*/
1971
6224f72b 1972AV*
864dbfa3 1973Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
1974{
1975 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1976 if (create)
1977 return GvAVn(gv);
1978 if (gv)
1979 return GvAV(gv);
1980 return Nullav;
1981}
1982
954c1994 1983/*
ccfc67b7
JH
1984=head1 Hash Manipulation Functions
1985
954c1994
GS
1986=for apidoc p||get_hv
1987
1988Returns the HV of the specified Perl hash. If C<create> is set and the
1989Perl variable does not exist then it will be created. If C<create> is not
1990set and the variable does not exist then NULL is returned.
1991
1992=cut
1993*/
1994
6224f72b 1995HV*
864dbfa3 1996Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 1997{
a0d0e21e
LW
1998 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1999 if (create)
2000 return GvHVn(gv);
2001 if (gv)
2002 return GvHV(gv);
2003 return Nullhv;
2004}
2005
954c1994 2006/*
ccfc67b7
JH
2007=head1 CV Manipulation Functions
2008
954c1994
GS
2009=for apidoc p||get_cv
2010
2011Returns the CV of the specified Perl subroutine. If C<create> is set and
2012the Perl subroutine does not exist then it will be declared (which has the
2013same effect as saying C<sub name;>). If C<create> is not set and the
2014subroutine does not exist then NULL is returned.
2015
2016=cut
2017*/
2018
a0d0e21e 2019CV*
864dbfa3 2020Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
2021{
2022 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 2023 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
2024 /* XXX this is probably not what they think they're getting.
2025 * It has the same effect as "sub name;", i.e. just a forward
2026 * declaration! */
8ebc5c01 2027 if (create && !GvCVu(gv))
774d564b 2028 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 2029 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 2030 Nullop,
a0d0e21e
LW
2031 Nullop);
2032 if (gv)
8ebc5c01 2033 return GvCVu(gv);
a0d0e21e
LW
2034 return Nullcv;
2035}
2036
79072805
LW
2037/* Be sure to refetch the stack pointer after calling these routines. */
2038
954c1994 2039/*
ccfc67b7
JH
2040
2041=head1 Callback Functions
2042
954c1994
GS
2043=for apidoc p||call_argv
2044
2045Performs a callback to the specified Perl sub. See L<perlcall>.
2046
2047=cut
2048*/
2049
a0d0e21e 2050I32
8f42b153 2051Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 2052
8ac85365
NIS
2053 /* See G_* flags in cop.h */
2054 /* null terminated arg list */
8990e307 2055{
a0d0e21e 2056 dSP;
8990e307 2057
924508f0 2058 PUSHMARK(SP);
a0d0e21e 2059 if (argv) {
8990e307 2060 while (*argv) {
a0d0e21e 2061 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
2062 argv++;
2063 }
a0d0e21e 2064 PUTBACK;
8990e307 2065 }
864dbfa3 2066 return call_pv(sub_name, flags);
8990e307
LW
2067}
2068
954c1994
GS
2069/*
2070=for apidoc p||call_pv
2071
2072Performs a callback to the specified Perl sub. See L<perlcall>.
2073
2074=cut
2075*/
2076
a0d0e21e 2077I32
864dbfa3 2078Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
2079 /* name of the subroutine */
2080 /* See G_* flags in cop.h */
a0d0e21e 2081{
864dbfa3 2082 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
2083}
2084
954c1994
GS
2085/*
2086=for apidoc p||call_method
2087
2088Performs a callback to the specified Perl method. The blessed object must
2089be on the stack. See L<perlcall>.
2090
2091=cut
2092*/
2093
a0d0e21e 2094I32
864dbfa3 2095Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
2096 /* name of the subroutine */
2097 /* See G_* flags in cop.h */
a0d0e21e 2098{
968b3946 2099 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
2100}
2101
2102/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
2103/*
2104=for apidoc p||call_sv
2105
2106Performs a callback to the Perl sub whose name is in the SV. See
2107L<perlcall>.
2108
2109=cut
2110*/
2111
a0d0e21e 2112I32
864dbfa3 2113Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 2114 /* See G_* flags in cop.h */
a0d0e21e 2115{
27da23d5 2116 dVAR; dSP;
a0d0e21e 2117 LOGOP myop; /* fake syntax tree node */
968b3946 2118 UNOP method_op;
aa689395 2119 I32 oldmark;
13689cfe 2120 volatile I32 retval = 0;
a0d0e21e 2121 I32 oldscope;
54310121 2122 bool oldcatch = CATCH_GET;
6224f72b 2123 int ret;
533c011a 2124 OP* oldop = PL_op;
db36c5a1 2125 dJMPENV;
1e422769 2126
a0d0e21e
LW
2127 if (flags & G_DISCARD) {
2128 ENTER;
2129 SAVETMPS;
2130 }
2131
aa689395 2132 Zero(&myop, 1, LOGOP);
54310121 2133 myop.op_next = Nullop;
f51d4af5 2134 if (!(flags & G_NOARGS))
aa689395 2135 myop.op_flags |= OPf_STACKED;
54310121
PP
2136 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2137 (flags & G_ARRAY) ? OPf_WANT_LIST :
2138 OPf_WANT_SCALAR);
462e5cf6 2139 SAVEOP();
533c011a 2140 PL_op = (OP*)&myop;
aa689395 2141
3280af22
NIS
2142 EXTEND(PL_stack_sp, 1);
2143 *++PL_stack_sp = sv;
aa689395 2144 oldmark = TOPMARK;
3280af22 2145 oldscope = PL_scopestack_ix;
a0d0e21e 2146
3280af22 2147 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 2148 /* Handle first BEGIN of -d. */
3280af22 2149 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
2150 /* Try harder, since this may have been a sighandler, thus
2151 * curstash may be meaningless. */
3280af22 2152 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 2153 && !(flags & G_NODEBUG))
533c011a 2154 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 2155
968b3946
GS
2156 if (flags & G_METHOD) {
2157 Zero(&method_op, 1, UNOP);
2158 method_op.op_next = PL_op;
2159 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2160 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 2161 PL_op = (OP*)&method_op;
968b3946
GS
2162 }
2163
312caa8e 2164 if (!(flags & G_EVAL)) {
0cdb2077 2165 CATCH_SET(TRUE);
14dd3ad8 2166 call_body((OP*)&myop, FALSE);
312caa8e 2167 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 2168 CATCH_SET(oldcatch);
312caa8e
CS
2169 }
2170 else {
d78bda3d 2171 myop.op_other = (OP*)&myop;
3280af22 2172 PL_markstack_ptr--;
4633a7c4
LW
2173 /* we're trying to emulate pp_entertry() here */
2174 {
c09156bb 2175 register PERL_CONTEXT *cx;
f54cb97a 2176 const I32 gimme = GIMME_V;
ac27b0f5 2177
4633a7c4
LW
2178 ENTER;
2179 SAVETMPS;
ac27b0f5 2180
1d76a5c3 2181 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 2182 PUSHEVAL(cx, 0, 0);
533c011a 2183 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 2184
faef0170 2185 PL_in_eval = EVAL_INEVAL;
4633a7c4 2186 if (flags & G_KEEPERR)
faef0170 2187 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 2188 else
c69006e4 2189 sv_setpvn(ERRSV,"",0);
4633a7c4 2190 }
3280af22 2191 PL_markstack_ptr++;
a0d0e21e 2192
14dd3ad8 2193 JMPENV_PUSH(ret);
6224f72b
GS
2194 switch (ret) {
2195 case 0:
14dd3ad8
GS
2196 redo_body:
2197 call_body((OP*)&myop, FALSE);
312caa8e
CS
2198 retval = PL_stack_sp - (PL_stack_base + oldmark);
2199 if (!(flags & G_KEEPERR))
c69006e4 2200 sv_setpvn(ERRSV,"",0);
a0d0e21e 2201 break;
6224f72b 2202 case 1:
f86702cc 2203 STATUS_ALL_FAILURE;
a0d0e21e 2204 /* FALL THROUGH */
6224f72b 2205 case 2:
a0d0e21e 2206 /* my_exit() was called */
3280af22 2207 PL_curstash = PL_defstash;
a0d0e21e 2208 FREETMPS;
14dd3ad8 2209 JMPENV_POP;
cc3604b1 2210 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2211 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2212 my_exit_jump();
a0d0e21e 2213 /* NOTREACHED */
6224f72b 2214 case 3:
3280af22 2215 if (PL_restartop) {
533c011a 2216 PL_op = PL_restartop;
3280af22 2217 PL_restartop = 0;
312caa8e 2218 goto redo_body;
a0d0e21e 2219 }
3280af22 2220 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2221 if (flags & G_ARRAY)
2222 retval = 0;
2223 else {
2224 retval = 1;
3280af22 2225 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 2226 }
312caa8e 2227 break;
a0d0e21e 2228 }
a0d0e21e 2229
3280af22 2230 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
2231 SV **newsp;
2232 PMOP *newpm;
2233 I32 gimme;
c09156bb 2234 register PERL_CONTEXT *cx;
a0a2876f
LW
2235 I32 optype;
2236
2237 POPBLOCK(cx,newpm);
2238 POPEVAL(cx);
3280af22 2239 PL_curpm = newpm;
a0a2876f 2240 LEAVE;
a0d0e21e 2241 }
14dd3ad8 2242 JMPENV_POP;
a0d0e21e 2243 }
1e422769 2244
a0d0e21e 2245 if (flags & G_DISCARD) {
3280af22 2246 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2247 retval = 0;
2248 FREETMPS;
2249 LEAVE;
2250 }
533c011a 2251 PL_op = oldop;
a0d0e21e
LW
2252 return retval;
2253}
2254
312caa8e 2255STATIC void
dd374669 2256S_call_body(pTHX_ const OP *myop, bool is_eval)
312caa8e 2257{
312caa8e
CS
2258 if (PL_op == myop) {
2259 if (is_eval)
f807eda9 2260 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 2261 else
f807eda9 2262 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
2263 }
2264 if (PL_op)
cea2e8a9 2265 CALLRUNOPS(aTHX);
312caa8e
CS
2266}
2267
6e72f9df 2268/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 2269
954c1994
GS
2270/*
2271=for apidoc p||eval_sv
2272
2273Tells Perl to C<eval> the string in the SV.
2274
2275=cut
2276*/
2277
a0d0e21e 2278I32
864dbfa3 2279Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 2280
8ac85365 2281 /* See G_* flags in cop.h */
a0d0e21e 2282{
924508f0 2283 dSP;
a0d0e21e 2284 UNOP myop; /* fake syntax tree node */
8fa7f367 2285 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 2286 volatile I32 retval = 0;
4633a7c4 2287 I32 oldscope;
6224f72b 2288 int ret;
533c011a 2289 OP* oldop = PL_op;
db36c5a1 2290 dJMPENV;
84902520 2291
4633a7c4
LW
2292 if (flags & G_DISCARD) {
2293 ENTER;
2294 SAVETMPS;
2295 }
2296
462e5cf6 2297 SAVEOP();
533c011a
NIS
2298 PL_op = (OP*)&myop;
2299 Zero(PL_op, 1, UNOP);
3280af22
NIS
2300 EXTEND(PL_stack_sp, 1);
2301 *++PL_stack_sp = sv;
2302 oldscope = PL_scopestack_ix;
79072805 2303
4633a7c4
LW
2304 if (!(flags & G_NOARGS))
2305 myop.op_flags = OPf_STACKED;
79072805 2306 myop.op_next = Nullop;
6e72f9df 2307 myop.op_type = OP_ENTEREVAL;
54310121
PP
2308 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2309 (flags & G_ARRAY) ? OPf_WANT_LIST :
2310 OPf_WANT_SCALAR);
6e72f9df
PP
2311 if (flags & G_KEEPERR)
2312 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2313
dedbcade
DM
2314 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2315 * before a PUSHEVAL, which corrupts the stack after a croak */
2316 TAINT_PROPER("eval_sv()");
2317
14dd3ad8 2318 JMPENV_PUSH(ret);
6224f72b
GS
2319 switch (ret) {
2320 case 0:
14dd3ad8
GS
2321 redo_body:
2322 call_body((OP*)&myop,TRUE);
312caa8e
CS
2323 retval = PL_stack_sp - (PL_stack_base + oldmark);
2324 if (!(flags & G_KEEPERR))
c69006e4 2325 sv_setpvn(ERRSV,"",0);
4633a7c4 2326 break;
6224f72b 2327 case 1:
f86702cc 2328 STATUS_ALL_FAILURE;
4633a7c4 2329 /* FALL THROUGH */
6224f72b 2330 case 2:
4633a7c4 2331 /* my_exit() was called */
3280af22 2332 PL_curstash = PL_defstash;
4633a7c4 2333 FREETMPS;
14dd3ad8 2334 JMPENV_POP;
cc3604b1 2335 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2336 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2337 my_exit_jump();
4633a7c4 2338 /* NOTREACHED */
6224f72b 2339 case 3:
3280af22 2340 if (PL_restartop) {
533c011a 2341 PL_op = PL_restartop;
3280af22 2342 PL_restartop = 0;
312caa8e 2343 goto redo_body;
4633a7c4 2344 }
3280af22 2345 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2346 if (flags & G_ARRAY)
2347 retval = 0;
2348 else {
2349 retval = 1;
3280af22 2350 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2351 }
312caa8e 2352 break;
4633a7c4
LW
2353 }
2354
14dd3ad8 2355 JMPENV_POP;
4633a7c4 2356 if (flags & G_DISCARD) {
3280af22 2357 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2358 retval = 0;
2359 FREETMPS;
2360 LEAVE;
2361 }
533c011a 2362 PL_op = oldop;
4633a7c4
LW
2363 return retval;
2364}
2365
954c1994
GS
2366/*
2367=for apidoc p||eval_pv
2368
2369Tells Perl to C<eval> the given string and return an SV* result.
2370
2371=cut
2372*/
2373
137443ea 2374SV*
864dbfa3 2375Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea
PP
2376{
2377 dSP;
2378 SV* sv = newSVpv(p, 0);
2379
864dbfa3 2380 eval_sv(sv, G_SCALAR);
137443ea
PP
2381 SvREFCNT_dec(sv);
2382
2383 SPAGAIN;
2384 sv = POPs;
2385 PUTBACK;
2386
2d8e6c8d
GS
2387 if (croak_on_error && SvTRUE(ERRSV)) {
2388 STRLEN n_a;
cea2e8a9 2389 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2d8e6c8d 2390 }
137443ea
PP
2391
2392 return sv;
2393}
2394
4633a7c4
LW
2395/* Require a module. */
2396
954c1994 2397/*
ccfc67b7
JH
2398=head1 Embedding Functions
2399
954c1994
GS
2400=for apidoc p||require_pv
2401
7d3fb230
BS
2402Tells Perl to C<require> the file named by the string argument. It is
2403analogous to the Perl code C<eval "require '$file'">. It's even
2307c6d0 2404implemented that way; consider using load_module instead.
954c1994 2405
7d3fb230 2406=cut */
954c1994 2407
4633a7c4 2408void
864dbfa3 2409Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2410{
d3acc0f7
JP
2411 SV* sv;
2412 dSP;
e788e7d3 2413 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7
JP
2414 PUTBACK;
2415 sv = sv_newmortal();
4633a7c4
LW
2416 sv_setpv(sv, "require '");
2417 sv_catpv(sv, pv);
2418 sv_catpv(sv, "'");
864dbfa3 2419 eval_sv(sv, G_DISCARD);
d3acc0f7
JP
2420 SPAGAIN;
2421 POPSTACK;
79072805
LW
2422}
2423
79072805 2424void
e1ec3a88 2425Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
79072805
LW
2426{
2427 register GV *gv;
2428
155aba94 2429 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2430 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2431}
2432
76e3520e 2433STATIC void
e1ec3a88 2434S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
4633a7c4 2435{
ab821d7f 2436 /* This message really ought to be max 23 lines.
75c72d73 2437 * Removed -h because the user already knows that option. Others? */
fb73857a 2438
27da23d5 2439 static const char * const usage_msg[] = {
fb73857a 2440"-0[octal] specify record separator (\\0, if no argument)",
f4ca673a 2441"-A[name] activate all/given assertions",
fb73857a 2442"-a autosplit mode with -n or -p (splits $_ into @F)",
fb3560ee 2443"-C[number/list] enables the listed Unicode features",
1950ee41 2444"-c check syntax only (runs BEGIN and CHECK blocks)",
aac3bd0d
GS
2445"-d[:debugger] run program under debugger",
2446"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
90490ea3 2447"-e program one line of program (several -e's allowed, omit programfile)",
f71cb6df 2448#ifdef USE_SITECUSTOMIZE
20ef40cf 2449"-f don't do $sitelib/sitecustomize.pl at startup",
f71cb6df 2450#endif
aac3bd0d
GS
2451"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2452"-i[extension] edit <> files in place (makes backup if extension supplied)",
2453"-Idirectory specify @INC/#include directory (several -I's allowed)",
fb73857a 2454"-l[octal] enable line ending processing, specifies line terminator",
aac3bd0d
GS
2455"-[mM][-]module execute `use/no module...' before executing program",
2456"-n assume 'while (<>) { ... }' loop around program",
2457"-p assume loop like -n but print line also, like sed",
2458"-P run program through C preprocessor before compilation",
2459"-s enable rudimentary parsing for switches after programfile",
2460"-S look for programfile using PATH environment variable",
9cbc33e8 2461"-t enable tainting warnings",
90490ea3 2462"-T enable tainting checks",
aac3bd0d 2463"-u dump core after parsing program",
fb73857a 2464"-U allow unsafe operations",
aac3bd0d
GS
2465"-v print version, subversion (includes VERY IMPORTANT perl info)",
2466"-V[:variable] print configuration summary (or a single Config.pm variable)",
2467"-w enable many useful warnings (RECOMMENDED)",
3c0facb2 2468"-W enable all warnings",
fb73857a 2469"-x[directory] strip off text before #!perl line and perhaps cd to directory",
90490ea3 2470"-X disable all warnings",
fb73857a
PP
2471"\n",
2472NULL
2473};
27da23d5 2474 const char * const *p = usage_msg;
fb73857a 2475
b0e47665
GS
2476 PerlIO_printf(PerlIO_stdout(),
2477 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2478 name);
fb73857a 2479 while (*p)
b0e47665 2480 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2481}
2482
b4ab917c
DM
2483/* convert a string of -D options (or digits) into an int.
2484 * sets *s to point to the char after the options */
2485
2486#ifdef DEBUGGING
2487int
e1ec3a88 2488Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
b4ab917c 2489{
27da23d5 2490 static const char * const usage_msgd[] = {
e6e64d9b
JC
2491 " Debugging flag values: (see also -d)",
2492 " p Tokenizing and parsing (with v, displays parse stack)",
3679267a 2493 " s Stack snapshots (with v, displays all stacks)",
e6e64d9b
JC
2494 " l Context (loop) stack processing",
2495 " t Trace execution",
2496 " o Method and overloading resolution",
2497 " c String/numeric conversions",
2498 " P Print profiling info, preprocessor command for -P, source file input state",
2499 " m Memory allocation",
2500 " f Format processing",
2501 " r Regular expression parsing and execution",
2502 " x Syntax tree dump",
3679267a 2503 " u Tainting checks",
e6e64d9b
JC
2504 " H Hash dump -- usurps values()",
2505 " X Scratchpad allocation",
2506 " D Cleaning up",
2507 " S Thread synchronization",
2508 " T Tokenising",
2509 " R Include reference counts of dumped variables (eg when using -Ds)",
2510 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2511 " v Verbose: use in conjunction with other flags",
2512 " C Copy On Write",
2513 " A Consistency checks on internal structures",
3679267a 2514 " q quiet - currently only suppresses the 'EXECUTING' message",
e6e64d9b
JC
2515 NULL
2516 };
b4ab917c
DM
2517 int i = 0;
2518 if (isALPHA(**s)) {
2519 /* if adding extra options, remember to update DEBUG_MASK */
bfed75c6 2520 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
b4ab917c
DM
2521
2522 for (; isALNUM(**s); (*s)++) {
e1ec3a88 2523 const char *d = strchr(debopts,**s);
b4ab917c
DM
2524 if (d)
2525 i |= 1 << (d - debopts);
2526 else if (ckWARN_d(WARN_DEBUGGING))
e6e64d9b
JC
2527 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2528 "invalid option -D%c, use -D'' to see choices\n", **s);
b4ab917c
DM
2529 }
2530 }
e6e64d9b 2531 else if (isDIGIT(**s)) {
b4ab917c
DM
2532 i = atoi(*s);
2533 for (; isALNUM(**s); (*s)++) ;
2534 }
ddcf8bc1 2535 else if (givehelp) {
aadb217d 2536 char **p = (char **)usage_msgd;
e6e64d9b
JC
2537 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2538 }
b4ab917c
DM
2539# ifdef EBCDIC
2540 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2541 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2542 "-Dp not implemented on this platform\n");
2543# endif
2544 return i;
2545}
2546#endif
2547
79072805
LW
2548/* This routine handles any switches that can be given during run */
2549
2550char *
864dbfa3 2551Perl_moreswitches(pTHX_ char *s)
79072805 2552{
27da23d5 2553 dVAR;
ba210ebe 2554 STRLEN numlen;
84c133a0 2555 UV rschar;
79072805
LW
2556
2557 switch (*s) {
2558 case '0':
a863c7d1 2559 {
f2095865
JH
2560 I32 flags = 0;
2561
2562 SvREFCNT_dec(PL_rs);
2563 if (s[1] == 'x' && s[2]) {
2564 char *e;
2565 U8 *tmps;
2566
2567 for (s += 2, e = s; *e; e++);
2568 numlen = e - s;
2569 flags = PERL_SCAN_SILENT_ILLDIGIT;
2570 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2571 if (s + numlen < e) {
2572 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2573 numlen = 0;
2574 s--;
2575 }
2576 PL_rs = newSVpvn("", 0);
c5661c80 2577 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
f2095865
JH
2578 tmps = (U8*)SvPVX(PL_rs);
2579 uvchr_to_utf8(tmps, rschar);
2580 SvCUR_set(PL_rs, UNISKIP(rschar));
2581 SvUTF8_on(PL_rs);
2582 }
2583 else {
2584 numlen = 4;
2585 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2586 if (rschar & ~((U8)~0))
2587 PL_rs = &PL_sv_undef;
2588 else if (!rschar && numlen >= 2)
2589 PL_rs = newSVpvn("", 0);
2590 else {
2591 char ch = (char)rschar;
2592 PL_rs = newSVpvn(&ch, 1);
2593 }
2594 }
800633c3 2595 sv_setsv(get_sv("/", TRUE), PL_rs);
f2095865 2596 return s + numlen;
a863c7d1 2597 }
46487f74 2598 case 'C':
a05d7ebb 2599 s++;
dd374669 2600 PL_unicode = parse_unicode_opts( (const char **)&s );
46487f74 2601 return s;
2304df62 2602 case 'F':
3280af22 2603 PL_minus_F = TRUE;
ebce5377
RGS
2604 PL_splitstr = ++s;
2605 while (*s && !isSPACE(*s)) ++s;
2606 *s = '\0';
2607 PL_splitstr = savepv(PL_splitstr);
2304df62 2608 return s;
79072805 2609 case 'a':
3280af22 2610 PL_minus_a = TRUE;
79072805
LW
2611 s++;
2612 return s;
2613 case 'c':
3280af22 2614 PL_minus_c = TRUE;
79072805
LW
2615 s++;
2616 return s;
2617 case 'd':
bbce6d69 2618 forbid_setid("-d");
4633a7c4 2619 s++;
2cbb2ee1
RGS
2620
2621 /* -dt indicates to the debugger that threads will be used */
2622 if (*s == 't' && !isALNUM(s[1])) {
2623 ++s;
2624 my_setenv("PERL5DB_THREADED", "1");
2625 }
2626
70c94a19
RR
2627 /* The following permits -d:Mod to accepts arguments following an =
2628 in the fashion that -MSome::Mod does. */
2629 if (*s == ':' || *s == '=') {
06b5626a 2630 const char *start;
70c94a19
RR
2631 SV *sv;
2632 sv = newSVpv("use Devel::", 0);
2633 start = ++s;
2634 /* We now allow -d:Module=Foo,Bar */
2635 while(isALNUM(*s) || *s==':') ++s;
2636 if (*s != '=')
2637 sv_catpv(sv, start);
2638 else {
2639 sv_catpvn(sv, start, s-start);
2640 sv_catpv(sv, " split(/,/,q{");
2641 sv_catpv(sv, ++s);
3d27e215 2642 sv_catpv(sv, "})");
70c94a19 2643 }
4633a7c4 2644 s += strlen(s);
70c94a19 2645 my_setenv("PERL5DB", SvPV(sv, PL_na));
4633a7c4 2646 }
ed094faf 2647 if (!PL_perldb) {
3280af22 2648 PL_perldb = PERLDB_ALL;
a0d0e21e 2649 init_debugger();
ed094faf 2650 }
79072805
LW
2651 return s;
2652 case 'D':
0453d815 2653 {
79072805 2654#ifdef DEBUGGING
bbce6d69 2655 forbid_setid("-D");
b4ab917c 2656 s++;
dd374669 2657 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
12a43e32 2658#else /* !DEBUGGING */
0453d815 2659 if (ckWARN_d(WARN_DEBUGGING))
9014280d 2660 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
e6e64d9b 2661 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
a0d0e21e 2662 for (s++; isALNUM(*s); s++) ;
79072805
LW
2663#endif
2664 /*SUPPRESS 530*/
2665 return s;
0453d815 2666 }
4633a7c4 2667 case 'h':
ac27b0f5 2668 usage(PL_origargv[0]);
7ca617d0 2669 my_exit(0);
79072805 2670 case 'i':
3280af22
NIS
2671 if (PL_inplace)
2672 Safefree(PL_inplace);
c030f24b
GH
2673#if defined(__CYGWIN__) /* do backup extension automagically */
2674 if (*(s+1) == '\0') {
2675 PL_inplace = savepv(".bak");
2676 return s+1;
2677 }
2678#endif /* __CYGWIN__ */
3280af22 2679 PL_inplace = savepv(s+1);
79072805 2680 /*SUPPRESS 530*/
3280af22 2681 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
7b8d334a 2682 if (*s) {
fb73857a 2683 *s++ = '\0';
7b8d334a
GS
2684 if (*s == '-') /* Additional switches on #! line. */
2685 s++;
2686 }
fb73857a 2687 return s;
4e49a025 2688 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 2689 forbid_setid("-I");
fb73857a
PP
2690 ++s;
2691 while (*s && isSPACE(*s))
2692 ++s;
2693 if (*s) {
774d564b 2694 char *e, *p;
0df16ed7
GS
2695 p = s;
2696 /* ignore trailing spaces (possibly followed by other switches) */
2697 do {
2698 for (e = p; *e && !isSPACE(*e); e++) ;
2699 p = e;
2700 while (isSPACE(*p))
2701 p++;
2702 } while (*p && *p != '-');
2703 e = savepvn(s, e-s);
88fe16b2 2704 incpush(e, TRUE, TRUE, FALSE, FALSE);
0df16ed7
GS
2705 Safefree(e);
2706 s = p;
2707 if (*s == '-')
2708 s++;
79072805
LW
2709 }
2710 else
a67e862a 2711 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 2712 return s;
79072805 2713 case 'l':
3280af22 2714 PL_minus_l = TRUE;
79072805 2715 s++;
7889fe52
NIS
2716 if (PL_ors_sv) {
2717 SvREFCNT_dec(PL_ors_sv);
2718 PL_ors_sv = Nullsv;
2719 }
79072805 2720 if (isDIGIT(*s)) {
53305cf1 2721 I32 flags = 0;
7889fe52 2722 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
2723 numlen = 3 + (*s == '0');
2724 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
2725 s += numlen;
2726 }
2727 else {
8bfdd7d9 2728 if (RsPARA(PL_rs)) {
7889fe52
NIS
2729 PL_ors_sv = newSVpvn("\n\n",2);
2730 }
2731 else {
8bfdd7d9 2732 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 2733 }
79072805
LW
2734 }
2735 return s;
06492da6
SF
2736 case 'A':
2737 forbid_setid("-A");
930366bd
RGS
2738 if (!PL_preambleav)
2739 PL_preambleav = newAV();
06492da6 2740 if (*++s) {
3d27e215
LM
2741 SV *sv = newSVpv("use assertions::activate split(/,/,q", 0);
2742 sv_catpvn(sv, "\0", 1); /* Use NUL as q//-delimiter. */
06492da6 2743 sv_catpv(sv,s);
3d27e215 2744 sv_catpvn(sv, "\0)", 2);
06492da6 2745 s+=strlen(s);
06492da6
SF
2746 av_push(PL_preambleav, sv);
2747 }
2748 else
930366bd 2749 av_push(PL_preambleav, newSVpvn("use assertions::activate",24));
06492da6 2750 return s;
1a30305b 2751 case 'M':
bbce6d69 2752 forbid_setid("-M"); /* XXX ? */
1a30305b
PP
2753 /* FALL THROUGH */
2754 case 'm':
bbce6d69 2755 forbid_setid("-m"); /* XXX ? */
1a30305b 2756 if (*++s) {
a5f75d66 2757 char *start;
11343788 2758 SV *sv;
e1ec3a88 2759 const char *use = "use ";
a5f75d66
AD
2760 /* -M-foo == 'no foo' */
2761 if (*s == '-') { use = "no "; ++s; }
11343788 2762 sv = newSVpv(use,0);
a5f75d66 2763 start = s;
1a30305b 2764 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
2765 while(isALNUM(*s) || *s==':') ++s;
2766 if (*s != '=') {
11343788 2767 sv_catpv(sv, start);
c07a80fd
PP
2768 if (*(start-1) == 'm') {
2769 if (*s != '\0')
cea2e8a9 2770 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 2771 sv_catpv( sv, " ()");
c07a80fd
PP
2772 }
2773 } else {
6df41af2 2774 if (s == start)
be98fb35
GS
2775 Perl_croak(aTHX_ "Module name required with -%c option",
2776 s[-1]);
11343788 2777 sv_catpvn(sv, start, s-start);
3d27e215
LM
2778 sv_catpv(sv, " split(/,/,q");
2779 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
11343788 2780 sv_catpv(sv, ++s);
3d27e215 2781 sv_catpvn(sv, "\0)", 2);
c07a80fd 2782 }
1a30305b 2783 s += strlen(s);
5c831c24 2784 if (!PL_preambleav)
3280af22
NIS
2785 PL_preambleav = newAV();
2786 av_push(PL_preambleav, sv);
1a30305b
PP
2787 }
2788 else
9e81e6a1 2789 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
1a30305b 2790 return s;
79072805 2791 case 'n':
3280af22 2792 PL_minus_n = TRUE;
79072805
LW
2793 s++;
2794 return s;
2795 case 'p':
3280af22 2796 PL_minus_p = TRUE;
79072805
LW
2797 s++;
2798 return s;
2799 case 's':
bbce6d69 2800 forbid_setid("-s");
3280af22 2801 PL_doswitches = TRUE;
79072805
LW
2802 s++;
2803 return s;
6537fe72
MS
2804 case 't':
2805 if (!PL_tainting)
22f7c9c9 2806 TOO_LATE_FOR('t');
6537fe72
MS
2807 s++;
2808 return s;
463ee0b2 2809 case 'T':
3280af22 2810 if (!PL_tainting)
22f7c9c9 2811 TOO_LATE_FOR('T');
463ee0b2
LW
2812 s++;
2813 return s;
79072805 2814 case 'u':
bf4acbe4
GS
2815#ifdef MACOS_TRADITIONAL
2816 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2817#endif
3280af22 2818 PL_do_undump = TRUE;
79072805
LW
2819 s++;
2820 return s;
2821 case 'U':
3280af22 2822 PL_unsafe = TRUE;
79072805
LW
2823 s++;
2824 return s;
2825 case 'v':
d7aa5382
JP
2826 if (!sv_derived_from(PL_patchlevel, "version"))
2827 (void *)upg_version(PL_patchlevel);
8e9464f1 2828#if !defined(DGUX)
b0e47665 2829 PerlIO_printf(PerlIO_stdout(),
014ead4b 2830 Perl_form(aTHX_ "\nThis is perl, v%"SVf" built for %s",
d7aa5382
JP
2831 vstringify(PL_patchlevel),
2832 ARCHNAME));
8e9464f1
JH
2833#else /* DGUX */
2834/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2835 PerlIO_printf(PerlIO_stdout(),
014ead4b 2836 Perl_form(aTHX_ "\nThis is perl, v%"SVf"\n",
d7aa5382 2837 vstringify(PL_patchlevel)));
8e9464f1
JH
2838 PerlIO_printf(PerlIO_stdout(),
2839 Perl_form(aTHX_ " built under %s at %s %s\n",
2840 OSNAME, __DATE__, __TIME__));
2841 PerlIO_printf(PerlIO_stdout(),
2842 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 2843 OSVERS));
8e9464f1
JH
2844#endif /* !DGUX */
2845
fb73857a
PP
2846#if defined(LOCAL_PATCH_COUNT)
2847 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
2848 PerlIO_printf(PerlIO_stdout(),
2849 "\n(with %d registered patch%s, "
2850 "see perl -V for more detail)",
2851 (int)LOCAL_PATCH_COUNT,
2852 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 2853#endif
1a30305b 2854
b0e47665 2855 PerlIO_printf(PerlIO_stdout(),
359b00fe 2856 "\n\nCopyright 1987-2005, Larry Wall\n");
eae9c151
JH
2857#ifdef MACOS_TRADITIONAL
2858 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2859 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 2860 "maintained by Chris Nandor\n");
eae9c151 2861#endif
79072805 2862#ifdef MSDOS
b0e47665
GS
2863 PerlIO_printf(PerlIO_stdout(),
2864 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
2865#endif
2866#ifdef DJGPP
b0e47665
GS
2867 PerlIO_printf(PerlIO_stdout(),
2868 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2869 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 2870#endif
79072805 2871#ifdef OS2
b0e47665
GS
2872 PerlIO_printf(PerlIO_stdout(),
2873 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 2874 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 2875#endif
79072805 2876#ifdef atarist
b0e47665
GS
2877 PerlIO_printf(PerlIO_stdout(),
2878 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 2879#endif
a3f9223b 2880#ifdef __BEOS__
b0e47665
GS
2881 PerlIO_printf(PerlIO_stdout(),
2882 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 2883#endif
1d84e8df 2884#ifdef MPE
b0e47665 2885 PerlIO_printf(PerlIO_stdout(),
e583a879 2886 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
1d84e8df 2887#endif
9d116dd7 2888#ifdef OEMVS
b0e47665
GS
2889 PerlIO_printf(PerlIO_stdout(),
2890 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 2891#endif
495c5fdc 2892#ifdef __VOS__
b0e47665 2893 PerlIO_printf(PerlIO_stdout(),
94efb9fb 2894 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 2895#endif
092bebab 2896#ifdef __OPEN_VM
b0e47665
GS
2897 PerlIO_printf(PerlIO_stdout(),
2898 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 2899#endif
a1a0e61e 2900#ifdef POSIX_BC
b0e47665
GS
2901 PerlIO_printf(PerlIO_stdout(),
2902 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 2903#endif
61ae2fbf 2904#ifdef __MINT__
b0e47665
GS
2905 PerlIO_printf(PerlIO_stdout(),
2906 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 2907#endif
f83d2536 2908#ifdef EPOC
b0e47665 2909 PerlIO_printf(PerlIO_stdout(),
be3c0a43 2910 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 2911#endif
e1caacb4 2912#ifdef UNDER_CE
b475b3e6
JH
2913 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
2914 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
e1caacb4
JH
2915 wce_hitreturn();
2916#endif
27da23d5
JH
2917#ifdef SYMBIAN
2918 PerlIO_printf(PerlIO_stdout(),
2919 "Symbian port by Nokia, 2004-2005\n");
2920#endif
baed7233
DL
2921#ifdef BINARY_BUILD_NOTICE
2922 BINARY_BUILD_NOTICE;
2923#endif
b0e47665
GS
2924 PerlIO_printf(PerlIO_stdout(),
2925 "\n\
79072805 2926Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 2927GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687
GS
2928Complete documentation for Perl, including FAQ lists, should be found on\n\
2929this system using `man perl' or `perldoc perl'. If you have access to the\n\
c9e30dd8 2930Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
7ca617d0 2931 my_exit(0);
79072805 2932 case 'w':
599cee73 2933 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 2934 PL_dowarn |= G_WARN_ON;
599cee73
PM
2935 s++;
2936 return s;
2937 case 'W':
ac27b0f5 2938 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS
2939 if (!specialWARN(PL_compiling.cop_warnings))
2940 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2941 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
2942 s++;
2943 return s;
2944 case 'X':
ac27b0f5 2945 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS
2946 if (!specialWARN(PL_compiling.cop_warnings))
2947 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 2948 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
2949 s++;
2950 return s;
a0d0e21e 2951 case '*':
79072805
LW
2952 case ' ':
2953 if (s[1] == '-') /* Additional switches on #! line. */
2954 return s+2;
2955 break;
a0d0e21e 2956 case '-':
79072805 2957 case 0:
51882d45 2958#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
2959 case '\r':
2960#endif
79072805
LW
2961 case '\n':
2962 case '\t':
2963 break;
aa689395
PP
2964#ifdef ALTERNATE_SHEBANG
2965 case 'S': /* OS/2 needs -S on "extproc" line. */
2966 break;
2967#endif
a0d0e21e 2968 case 'P':
3280af22 2969 if (PL_preprocess)
a0d0e21e
LW
2970 return s+1;
2971 /* FALL THROUGH */
79072805 2972 default:
cea2e8a9 2973 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
2974 }
2975 return Nullch;
2976}
2977
2978/* compliments of Tom Christiansen */
2979
2980/* unexec() can be found in the Gnu emacs distribution */
ee580363 2981/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
2982
2983void
864dbfa3 2984Perl_my_unexec(pTHX)
79072805
LW
2985{
2986#ifdef UNEXEC
46fc3d4c
PP
2987 SV* prog;
2988 SV* file;
ee580363 2989 int status = 1;
79072805
LW
2990 extern int etext;
2991
ee580363 2992 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 2993 sv_catpv(prog, "/perl");
6b88bc9c 2994 file = newSVpv(PL_origfilename, 0);
46fc3d4c 2995 sv_catpv(file, ".perldump");
79072805 2996
ee580363
GS
2997 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2998 /* unexec prints msg to stderr in case of failure */
6ad3d225 2999 PerlProc_exit(status);
79072805 3000#else
a5f75d66
AD
3001# ifdef VMS
3002# include <lib$routines.h>
3003 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 3004# else
79072805 3005 ABORT(); /* for use with undump */
aa689395 3006# endif
a5f75d66 3007#endif
79072805
LW
3008}
3009
cb68f92d
GS
3010/* initialize curinterp */
3011STATIC void
cea2e8a9 3012S_init_interp(pTHX)
cb68f92d
GS
3013{
3014
acfe0abc
GS
3015#ifdef MULTIPLICITY
3016# define PERLVAR(var,type)
3017# define PERLVARA(var,n,type)
3018# if defined(PERL_IMPLICIT_CONTEXT)
3019# if defined(USE_5005THREADS)
3020# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
27da23d5 3021# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
3022# else /* !USE_5005THREADS */
3023# define PERLVARI(var,type,init) aTHX->var = init;
3024# define PERLVARIC(var,type,init) aTHX->var = init;
3025# endif /* USE_5005THREADS */
3967c732 3026# else
acfe0abc
GS
3027# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3028# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 3029# endif
acfe0abc
GS
3030# include "intrpvar.h"
3031# ifndef USE_5005THREADS
3032# include "thrdvar.h"
3033# endif
3034# undef PERLVAR
3035# undef PERLVARA
3036# undef PERLVARI
3037# undef PERLVARIC
3038#else
3039# define PERLVAR(var,type)
3040# define PERLVARA(var,n,type)
3041# define PERLVARI(var,type,init) PL_##var = init;
3042# define PERLVARIC(var,type,init) PL_##var = init;
3043# include "intrpvar.h"
3044# ifndef USE_5005THREADS
3045# include "thrdvar.h"
3046# endif
3047# undef PERLVAR
3048# undef PERLVARA
3049# undef PERLVARI
3050# undef PERLVARIC
cb68f92d
GS
3051#endif
3052
cb68f92d
GS
3053}
3054
76e3520e 3055STATIC void
cea2e8a9 3056S_init_main_stash(pTHX)
79072805 3057{
463ee0b2 3058 GV *gv;
6e72f9df 3059
3280af22 3060 PL_curstash = PL_defstash = newHV();
79cb57f6 3061 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
3062 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3063 SvREFCNT_dec(GvHV(gv));
3280af22 3064 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 3065 SvREADONLY_on(gv);
ff5bdd37 3066 HvNAME(PL_defstash) = savepvn("main", 4);
3280af22
NIS
3067 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3068 GvMULTI_on(PL_incgv);
3069 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3070 GvMULTI_on(PL_hintgv);
3071 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3072 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3073 GvMULTI_on(PL_errgv);
3074 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3075 GvMULTI_on(PL_replgv);
cea2e8a9 3076 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
38a03e6e
MB
3077 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3078 sv_setpvn(ERRSV, "", 0);
3280af22 3079 PL_curstash = PL_defstash;
11faa288 3080 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 3081 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 3082 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 3083 /* We must init $/ before switches are processed. */
864dbfa3 3084 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
3085}
3086
ae3f3efd 3087/* PSz 18 Nov 03 fdscript now global but do not change prototype */
76e3520e 3088STATIC void
dd374669 3089S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
79072805 3090{
ae3f3efd 3091#ifndef IAMSUID
e1ec3a88
AL
3092 const char *quote;
3093 const char *code;
3094 const char *cpp_discard_flag;
3095 const char *perl;
ae3f3efd 3096#endif
27da23d5 3097 dVAR;
1b24ed4b 3098
ae3f3efd
PS
3099 PL_fdscript = -1;
3100 PL_suidscript = -1;
79072805 3101
3280af22 3102 if (PL_e_script) {
ff5bdd37 3103 PL_origfilename = savepvn("-e", 2);
96436eeb 3104 }
6c4ab083
GS
3105 else {
3106 /* if find_script() returns, it returns a malloc()-ed value */
dd374669 3107 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
3108
3109 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
e1ec3a88 3110 const char *s = scriptname + 8;
ae3f3efd 3111 PL_fdscript = atoi(s);
6c4ab083
GS
3112 while (isDIGIT(*s))
3113 s++;
3114 if (*s) {
ae3f3efd
PS
3115 /* PSz 18 Feb 04
3116 * Tell apart "normal" usage of fdscript, e.g.
3117 * with bash on FreeBSD:
3118 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3119 * from usage in suidperl.
3120 * Does any "normal" usage leave garbage after the number???
3121 * Is it a mistake to use a similar /dev/fd/ construct for
3122 * suidperl?
3123 */
3124 PL_suidscript = 1;
3125 /* PSz 20 Feb 04
3126 * Be supersafe and do some sanity-checks.
3127 * Still, can we be sure we got the right thing?
3128 */
3129 if (*s != '/') {
3130 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3131 }
3132 if (! *(s+1)) {
3133 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3134 }
6c4ab083 3135 scriptname = savepv(s + 1);
3280af22 3136 Safefree(PL_origfilename);
dd374669 3137 PL_origfilename = (char *)scriptname;
6c4ab083
GS
3138 }
3139 }
3140 }
3141
05ec9bb3 3142 CopFILE_free(PL_curcop);
57843af0 3143 CopFILE_set(PL_curcop, PL_origfilename);
770526c1 3144 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
dd374669 3145 scriptname = (char *)"";
ae3f3efd
PS
3146 if (PL_fdscript >= 0) {
3147 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS
3148# if defined(HAS_FCNTL) && defined(F_SETFD)
3149 if (PL_rsfp)
3150 /* ensure close-on-exec */
3151 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3152# endif
96436eeb 3153 }
ae3f3efd
PS
3154#ifdef IAMSUID
3155 else {
86207487
NC
3156 Perl_croak(aTHX_ "sperl needs fd script\n"
3157 "You should not call sperl directly; do you need to "
3158 "change a #! line\nfrom sperl to perl?\n");
3159
ae3f3efd
PS
3160/* PSz 11 Nov 03
3161 * Do not open (or do other fancy stuff) while setuid.
3162 * Perl does the open, and hands script to suidperl on a fd;
3163 * suidperl only does some checks, sets up UIDs and re-execs
3164 * perl with that fd as it has always done.
3165 */
3166 }
3167 if (PL_suidscript != 1) {
3168 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3169 }
3170#else /* IAMSUID */
3280af22 3171 else if (PL_preprocess) {
dd374669 3172 const char *cpp_cfg = CPPSTDIN;
79cb57f6 3173 SV *cpp = newSVpvn("",0);
46fc3d4c
PP
3174 SV *cmd = NEWSV(0,0);
3175
ae58f265
JH
3176 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3177 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
46fc3d4c 3178 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 3179 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 3180 sv_catpv(cpp, cpp_cfg);
79072805 3181
1b24ed4b
MS
3182# ifndef VMS
3183 sv_catpvn(sv, "-I", 2);
3184 sv_catpv(sv,PRIVLIB_EXP);
3185# endif
46fc3d4c 3186
14953ddc
MB
3187 DEBUG_P(PerlIO_printf(Perl_debug_log,
3188 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3189 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
1b24ed4b
MS
3190
3191# if defined(MSDOS) || defined(WIN32) || defined(VMS)
3192 quote = "\"";
3193# else
3194 quote = "'";
3195# endif
3196
3197# ifdef VMS
3198 cpp_discard_flag = "";
3199# else
3200 cpp_discard_flag = "-C";
3201# endif
3202
3203# ifdef OS2
3204 perl = os2_execname(aTHX);
3205# else
3206 perl = PL_origargv[0];
3207# endif
3208
3209
3210 /* This strips off Perl comments which might interfere with
62375a60
NIS
3211 the C pre-processor, including #!. #line directives are
3212 deliberately stripped to avoid confusion with Perl's version
1b24ed4b
MS
3213 of #line. FWP played some golf with it so it will fit
3214 into VMS's 255 character buffer.
3215 */
3216 if( PL_doextract )
3217 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3218 else
3219 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3220
3221 Perl_sv_setpvf(aTHX_ cmd, "\
3222%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
62375a60 3223 perl, quote, code, quote, scriptname, cpp,
1b24ed4b
MS
3224 cpp_discard_flag, sv, CPPMINUS);
3225
3280af22 3226 PL_doextract = FALSE;
0a6c758d 3227
62375a60
NIS
3228 DEBUG_P(PerlIO_printf(Perl_debug_log,
3229 "PL_preprocess: cmd=\"%s\"\n",
0a6c758d
MS
3230 SvPVX(cmd)));
3231
dd374669 3232 PL_rsfp = PerlProc_popen(SvPVX(cmd), (char *)"r");
46fc3d4c
PP
3233 SvREFCNT_dec(cmd);
3234 SvREFCNT_dec(cpp);
79072805
LW
3235 }
3236 else if (!*scriptname) {
bbce6d69 3237 forbid_setid("program input from stdin");
3280af22 3238 PL_rsfp = PerlIO_stdin();
79072805 3239 }
96436eeb 3240 else {
3280af22 3241 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1b24ed4b
MS
3242# if defined(HAS_FCNTL) && defined(F_SETFD)
3243 if (PL_rsfp)
3244 /* ensure close-on-exec */
3245 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3246# endif
96436eeb 3247 }
ae3f3efd 3248#endif /* IAMSUID */
3280af22 3249 if (!PL_rsfp) {
447218f8 3250 /* PSz 16 Sep 03 Keep neat error message */
fa3aa65a
JC
3251 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3252 CopFILE(PL_curcop), Strerror(errno));
13281fa4 3253 }
79072805 3254}
8d063cd8 3255
7b89560d
JH
3256/* Mention
3257 * I_SYSSTATVFS HAS_FSTATVFS
3258 * I_SYSMOUNT
c890dc6c 3259 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
7b89560d
JH
3260 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3261 * here so that metaconfig picks them up. */
3262
104d25b7 3263#ifdef IAMSUID
864dbfa3 3264STATIC int
e688b231 3265S_fd_on_nosuid_fs(pTHX_ int fd)
104d25b7 3266{
ae3f3efd
PS
3267/* PSz 27 Feb 04
3268 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3269 * but is needed also on machines without setreuid.
3270 * Seems safe enough to run as root.
3271 */
0545a864
JH
3272 int check_okay = 0; /* able to do all the required sys/libcalls */
3273 int on_nosuid = 0; /* the fd is on a nosuid fs */
ae3f3efd
PS
3274 /* PSz 12 Nov 03
3275 * Need to check noexec also: nosuid might not be set, the average
3276 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3277 */
3278 int on_noexec = 0; /* the fd is on a noexec fs */
3279
104d25b7 3280/*
ad27e871 3281 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
e688b231 3282 * fstatvfs() is UNIX98.
0545a864 3283 * fstatfs() is 4.3 BSD.
ad27e871 3284 * ustat()+getmnt() is pre-4.3 BSD.
0545a864
JH
3285 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3286 * an irrelevant filesystem while trying to reach the right one.
104d25b7
JH
3287 */
3288
6439433f
JH
3289#undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3290
3291# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3292 defined(HAS_FSTATVFS)
3293# define FD_ON_NOSUID_CHECK_OKAY
104d25b7 3294 struct statvfs stfs;
6439433f 3295
104d25b7
JH
3296 check_okay = fstatvfs(fd, &stfs) == 0;
3297 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
ae3f3efd
PS
3298#ifdef ST_NOEXEC
3299 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3300 on platforms where it is present. */
3301 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3302#endif
6439433f 3303# endif /* fstatvfs */
ac27b0f5 3304
6439433f
JH
3305# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3306 defined(PERL_MOUNT_NOSUID) && \
ae3f3efd 3307 defined(PERL_MOUNT_NOEXEC) && \
6439433f
JH
3308 defined(HAS_FSTATFS) && \
3309 defined(HAS_STRUCT_STATFS) && \
3310 defined(HAS_STRUCT_STATFS_F_FLAGS)
3311# define FD_ON_NOSUID_CHECK_OKAY
e688b231 3312 struct statfs stfs;
6439433f 3313
104d25b7 3314 check_okay = fstatfs(fd, &stfs) == 0;
104d25b7 3315 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
ae3f3efd 3316 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
6439433f
JH
3317# endif /* fstatfs */
3318
3319# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3320 defined(PERL_MOUNT_NOSUID) && \
ae3f3efd 3321 defined(PERL_MOUNT_NOEXEC) && \
6439433f
JH
3322 defined(HAS_FSTAT) && \
3323 defined(HAS_USTAT) && \
3324 defined(HAS_GETMNT) && \
3325 defined(HAS_STRUCT_FS_DATA) && \
3326 defined(NOSTAT_ONE)
3327# define FD_ON_NOSUID_CHECK_OKAY
c623ac67 3328 Stat_t fdst;
6439433f 3329
0545a864 3330 if (fstat(fd, &fdst) == 0) {
6439433f
JH
3331 struct ustat us;
3332 if (ustat(fdst.st_dev, &us) == 0) {
3333 struct fs_data fsd;
3334 /* NOSTAT_ONE here because we're not examining fields which
3335 * vary between that case and STAT_ONE. */
ad27e871 3336 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
6439433f
JH
3337 size_t cmplen = sizeof(us.f_fname);
3338 if (sizeof(fsd.fd_req.path) < cmplen)
3339 cmplen = sizeof(fsd.fd_req.path);
3340 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3341 fdst.st_dev == fsd.fd_req.dev) {
3342 check_okay = 1;
3343 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
ae3f3efd 3344 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
6439433f
JH
3345 }
3346 }
3347 }
3348 }
0545a864 3349 }
6439433f
JH
3350# endif /* fstat+ustat+getmnt */
3351
3352# if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3353 defined(HAS_GETMNTENT) && \
3354 defined(HAS_HASMNTOPT) && \
ae3f3efd
PS
3355 defined(MNTOPT_NOSUID) && \
3356 defined(MNTOPT_NOEXEC)
6439433f
JH
3357# define FD_ON_NOSUID_CHECK_OKAY
3358 FILE *mtab = fopen("/etc/mtab", "r");
3359 struct mntent *entry;
c623ac67 3360 Stat_t stb, fsb;
104d25b7
JH
3361
3362 if (mtab && (fstat(fd, &stb) == 0)) {
6439433f
JH
3363 while (entry = getmntent(mtab)) {
3364 if (stat(entry->mnt_dir, &fsb) == 0
3365 && fsb.st_dev == stb.st_dev)
3366 {
3367 /* found the filesystem */
3368 check_okay = 1;
3369 if (hasmntopt(entry, MNTOPT_NOSUID))
3370 on_nosuid = 1;
ae3f3efd
PS
3371 if (hasmntopt(entry, MNTOPT_NOEXEC))
3372 on_noexec = 1;
6439433f
JH
3373 break;
3374 } /* A single fs may well fail its stat(). */
3375 }
104d25b7
JH
3376 }
3377 if (mtab)
6439433f
JH
3378 fclose(mtab);
3379# endif /* getmntent+hasmntopt */
0545a864 3380
ac27b0f5 3381 if (!check_okay)
ae3f3efd
PS
3382 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3383 if (on_nosuid)
3384 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3385 if (on_noexec)
3386 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3387 return ((!check_okay) || on_nosuid || on_noexec);
104d25b7
JH
3388}
3389#endif /* IAMSUID */
3390
76e3520e 3391STATIC void
e1ec3a88 3392S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
79072805 3393{
27da23d5 3394 dVAR;
155aba94 3395#ifdef IAMSUID
ae3f3efd
PS
3396 /* int which; */
3397#endif /* IAMSUID */
96436eeb 3398
13281fa4
LW
3399 /* do we need to emulate setuid on scripts? */
3400
3401 /* This code is for those BSD systems that have setuid #! scripts disabled
3402 * in the kernel because of a security problem. Merely defining DOSUID
3403 * in perl will not fix that problem, but if you have disabled setuid
3404 * scripts in the kernel, this will attempt to emulate setuid and setgid
3405 * on scripts that have those now-otherwise-useless bits set. The setuid
27e2fb84
LW
3406 * root version must be called suidperl or sperlN.NNN. If regular perl
3407 * discovers that it has opened a setuid script, it calls suidperl with
3408 * the same argv that it had. If suidperl finds that the script it has
3409 * just opened is NOT setuid root, it sets the effective uid back to the
3410 * uid. We don't just make perl setuid root because that loses the
3411 * effective uid we had before invoking perl, if it was different from the
3412 * uid.
ae3f3efd
PS
3413 * PSz 27 Feb 04
3414 * Description/comments above do not match current workings:
3415 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3416 * suidperl called with script open and name changed to /dev/fd/N/X;
3417 * suidperl croaks if script is not setuid;
3418 * making perl setuid would be a huge security risk (and yes, that
3419 * would lose any euid we might have had).
13281fa4
LW
3420 *
3421 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3422 * be defined in suidperl only. suidperl must be setuid root. The
3423 * Configure script will set this up for you if you want it.
3424 */
a687059c 3425
13281fa4 3426#ifdef DOSUID
6e72f9df 3427 char *s, *s2;
a0d0e21e 3428
b28d0864 3429 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
cea2e8a9 3430 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
ae3f3efd 3431 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
79072805 3432 I32 len;
2d8e6c8d 3433 STRLEN n_a;
13281fa4 3434
a687059c 3435#ifdef IAMSUID
ae3f3efd
PS
3436 if (PL_fdscript < 0 || PL_suidscript != 1)
3437 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3438 /* PSz 11 Nov 03
3439 * Since the script is opened by perl, not suidperl, some of these
3440 * checks are superfluous. Leaving them in probably does not lower
3441 * security(?!).
3442 */
3443 /* PSz 27 Feb 04
3444 * Do checks even for systems with no HAS_SETREUID.
3445 * We used to swap, then re-swap UIDs with
3446#ifdef HAS_SETREUID
3447 if (setreuid(PL_euid,PL_uid) < 0
3448 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3449 Perl_croak(aTHX_ "Can't swap uid and euid");
3450#endif
3451#ifdef HAS_SETREUID
3452 if (setreuid(PL_uid,PL_euid) < 0
3453 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3454 Perl_croak(aTHX_ "Can't reswap uid and euid");
3455#endif
3456 */
3457
a687059c
LW
3458 /* On this access check to make sure the directories are readable,
3459 * there is actually a small window that the user could use to make
3460 * filename point to an accessible directory. So there is a faint
3461 * chance that someone could execute a setuid script down in a
3462 * non-accessible directory. I don't know what to do about that.
3463 * But I don't think it's too important. The manual lies when
3464 * it says access() is useful in setuid programs.
ae3f3efd
PS
3465 *
3466 * So, access() is pretty useless... but not harmful... do anyway.
a687059c 3467 */
e57400b1 3468 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
ae3f3efd 3469 Perl_croak(aTHX_ "Can't access() script\n");
e57400b1 3470 }
ae3f3efd 3471
a687059c
LW
3472 /* If we can swap euid and uid, then we can determine access rights
3473 * with a simple stat of the file, and then compare device and
3474 * inode to make sure we did stat() on the same file we opened.
3475 * Then we just have to make sure he or she can execute it.
ae3f3efd
PS
3476 *
3477 * PSz 24 Feb 04
3478 * As the script is opened by perl, not suidperl, we do not need to
3479 * care much about access rights.
3480 *
3481 * The 'script changed' check is needed, or we can get lied to
3482 * about $0 with e.g.
3483 * suidperl /dev/fd/4//bin/x 4<setuidscript
3484 * Without HAS_SETREUID, is it safe to stat() as root?
3485 *
3486 * Are there any operating systems that pass /dev/fd/xxx for setuid
3487 * scripts, as suggested/described in perlsec(1)? Surely they do not
3488 * pass the script name as we do, so the "script changed" test would
3489 * fail for them... but we never get here with
3490 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3491 *
3492 * This is one place where we must "lie" about return status: not
3493 * say if the stat() failed. We are doing this as root, and could
3494 * be tricked into reporting existence or not of files that the
3495 * "plain" user cannot even see.
a687059c
LW
3496 */
3497 {
c623ac67 3498 Stat_t tmpstatbuf;
ae3f3efd
PS
3499 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3500 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
b28d0864 3501 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
ae3f3efd 3502 Perl_croak(aTHX_ "Setuid script changed\n");
a687059c 3503 }
ae3f3efd 3504
a687059c 3505 }
ae3f3efd
PS
3506 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3507 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3508
3509 /* PSz 27 Feb 04
3510 * We used to do this check as the "plain" user (after swapping
3511 * UIDs). But the check for nosuid and noexec filesystem is needed,
3512 * and should be done even without HAS_SETREUID. (Maybe those
3513 * operating systems do not have such mount options anyway...)
3514 * Seems safe enough to do as root.
3515 */
3516#if !defined(NO_NOSUID_CHECK)
3517 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3518 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3519 }
3520#endif
a687059c
LW
3521#endif /* IAMSUID */
3522
e57400b1 3523 if (!S_ISREG(PL_statbuf.st_mode)) {
ae3f3efd 3524 Perl_croak(aTHX_ "Setuid script not plain file\n");
e57400b1 3525 }
b28d0864 3526 if (PL_statbuf.st_mode & S_IWOTH)
cea2e8a9 3527 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
6b88bc9c 3528 PL_doswitches = FALSE; /* -s is insecure in suid */
ae3f3efd 3529 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
57843af0 3530 CopLINE_inc(PL_curcop);
6b88bc9c 3531 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2d8e6c8d 3532 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
cea2e8a9 3533 Perl_croak(aTHX_ "No #! line");
2d8e6c8d 3534 s = SvPV(PL_linestr,n_a)+2;
ae3f3efd
PS
3535 /* PSz 27 Feb 04 */
3536 /* Sanity check on line length */
3537 if (strlen(s) < 1 || strlen(s) > 4000)
3538 Perl_croak(aTHX_ "Very long #! line");
3539 /* Allow more than a single space after #! */
3540 while (isSPACE(*s)) s++;
3541 /* Sanity check on buffer end */
3542 while ((*s) && !isSPACE(*s)) s++;
2d8e6c8d 3543 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
3792a11b
NC
3544 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3545 || s2[-1] == '-')); s2--) ;
ae3f3efd
PS
3546 /* Sanity check on buffer start */
3547 if ( (s2-4 < SvPV(PL_linestr,n_a)+2 || strnNE(s2-4,"perl",4)) &&
3548 (s-9 < SvPV(PL_linestr,n_a)+2 || strnNE(s-9,"perl",4)) )
cea2e8a9 3549 Perl_croak(aTHX_ "Not a perl script");
a687059c 3550 while (*s == ' ' || *s == '\t') s++;
13281fa4
LW
3551 /*
3552 * #! arg must be what we saw above. They can invoke it by
3553 * mentioning suidperl explicitly, but they may not add any strange
3554 * arguments beyond what #! says if they do invoke suidperl that way.
3555 */
ae3f3efd
PS
3556 /*
3557 * The way validarg was set up, we rely on the kernel to start