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1/* perl.c
2 *
4bb101f2 3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
fdf8c088 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
a687059c 5 *
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6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
a687059c 8 *
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9 */
10
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11/*
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
13 */
45d8adaa 14
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15/* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
ddfa107c 18 * function of the interpreter; that can be found in perlmain.c
166f8a29
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19 */
20
ae3f3efd
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21/* PSz 12 Nov 03
22 *
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
26 *
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
32 *
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
38 *
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
42 *
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
45 *
46 * References:
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
55 * CVE candidate:
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
62 *
63Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64School of Mathematics and Statistics University of Sydney 2006 Australia
65 *
66 */
67/* PSz 13 Nov 03
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
70 */
71
72/* PSz 18 Feb 04
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
78 */
79
378cc40b 80#include "EXTERN.h"
864dbfa3 81#define PERL_IN_PERL_C
378cc40b 82#include "perl.h"
e3321bb0 83#include "patchlevel.h" /* for local_patches */
378cc40b 84
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85#ifdef NETWARE
86#include "nwutil.h"
87char *nw_get_sitelib(const char *pl);
88#endif
89
df5cef82 90/* XXX If this causes problems, set i_unistd=undef in the hint file. */
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91#ifdef I_UNISTD
92#include <unistd.h>
93#endif
a0d0e21e 94
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95#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
96# ifdef I_SYS_WAIT
97# include <sys/wait.h>
98# endif
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99# ifdef I_SYSUIO
100# include <sys/uio.h>
101# endif
102
103union control_un {
104 struct cmsghdr cm;
105 char control[CMSG_SPACE(sizeof(int))];
106};
107
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108#endif
109
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110#ifdef __BEOS__
111# define HZ 1000000
112#endif
113
114#ifndef HZ
115# ifdef CLK_TCK
116# define HZ CLK_TCK
117# else
118# define HZ 60
119# endif
120#endif
121
7114a2d2 122#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
20ce7b12 123char *getenv (char *); /* Usually in <stdlib.h> */
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124#endif
125
acfe0abc 126static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
0cb96387 127
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128#ifdef IAMSUID
129#ifndef DOSUID
130#define DOSUID
131#endif
ae3f3efd 132#endif /* IAMSUID */
378cc40b 133
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134#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
135#ifdef DOSUID
136#undef DOSUID
137#endif
138#endif
8d063cd8 139
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140#define CALL_BODY_EVAL(myop) \
141 if (PL_op == (myop)) \
142 PL_op = Perl_pp_entereval(aTHX); \
143 if (PL_op) \
144 CALLRUNOPS(aTHX);
145
146#define CALL_BODY_SUB(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entersub(aTHX); \
149 if (PL_op) \
150 CALLRUNOPS(aTHX);
151
152#define CALL_LIST_BODY(cv) \
153 PUSHMARK(PL_stack_sp); \
154 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
155
e6827a76 156static void
daa7d858 157S_init_tls_and_interp(PerlInterpreter *my_perl)
e6827a76 158{
27da23d5 159 dVAR;
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160 if (!PL_curinterp) {
161 PERL_SET_INTERP(my_perl);
3db8f154 162#if defined(USE_ITHREADS)
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163 INIT_THREADS;
164 ALLOC_THREAD_KEY;
165 PERL_SET_THX(my_perl);
166 OP_REFCNT_INIT;
71ad1b0c 167 HINTS_REFCNT_INIT;
e6827a76 168 MUTEX_INIT(&PL_dollarzero_mutex);
06d86050 169# endif
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170#ifdef PERL_IMPLICIT_CONTEXT
171 MUTEX_INIT(&PL_my_ctx_mutex);
172# endif
e6827a76 173 }
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174#if defined(USE_ITHREADS)
175 else
176#else
177 /* This always happens for non-ithreads */
178#endif
179 {
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180 PERL_SET_THX(my_perl);
181 }
182}
06d86050 183
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184
185/* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
186
187void
188Perl_sys_init(int* argc, char*** argv)
189{
190 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
191 PERL_UNUSED_ARG(argv);
192 PERL_SYS_INIT_BODY(argc, argv);
193}
194
195void
196Perl_sys_init3(int* argc, char*** argv, char*** env)
197{
198 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
199 PERL_UNUSED_ARG(argv);
200 PERL_UNUSED_ARG(env);
201 PERL_SYS_INIT3_BODY(argc, argv, env);
202}
203
204void
205Perl_sys_term(pTHX)
206{
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207 if (!PL_veto_cleanup) {
208 PERL_SYS_TERM_BODY();
209 }
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210}
211
212
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213#ifdef PERL_IMPLICIT_SYS
214PerlInterpreter *
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215perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
216 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
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217 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
218 struct IPerlDir* ipD, struct IPerlSock* ipS,
219 struct IPerlProc* ipP)
220{
221 PerlInterpreter *my_perl;
9f653bb5 222 /* Newx() needs interpreter, so call malloc() instead */
32e30700 223 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
e6827a76 224 S_init_tls_and_interp(my_perl);
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225 Zero(my_perl, 1, PerlInterpreter);
226 PL_Mem = ipM;
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227 PL_MemShared = ipMS;
228 PL_MemParse = ipMP;
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229 PL_Env = ipE;
230 PL_StdIO = ipStd;
231 PL_LIO = ipLIO;
232 PL_Dir = ipD;
233 PL_Sock = ipS;
234 PL_Proc = ipP;
7cb608b5 235 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
7766f137 236
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237 return my_perl;
238}
239#else
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240
241/*
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242=head1 Embedding Functions
243
954c1994
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244=for apidoc perl_alloc
245
246Allocates a new Perl interpreter. See L<perlembed>.
247
248=cut
249*/
250
93a17b20 251PerlInterpreter *
cea2e8a9 252perl_alloc(void)
79072805 253{
cea2e8a9 254 PerlInterpreter *my_perl;
79072805 255
9f653bb5 256 /* Newx() needs interpreter, so call malloc() instead */
e8ee3774 257 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 258
e6827a76 259 S_init_tls_and_interp(my_perl);
7cb608b5 260#ifndef PERL_TRACK_MEMPOOL
07409e01 261 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
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262#else
263 Zero(my_perl, 1, PerlInterpreter);
264 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
265 return my_perl;
266#endif
79072805 267}
32e30700 268#endif /* PERL_IMPLICIT_SYS */
79072805 269
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270/*
271=for apidoc perl_construct
272
273Initializes a new Perl interpreter. See L<perlembed>.
274
275=cut
276*/
277
79072805 278void
0cb96387 279perl_construct(pTHXx)
79072805 280{
27da23d5 281 dVAR;
ed6c66dd 282 PERL_UNUSED_ARG(my_perl);
8990e307 283#ifdef MULTIPLICITY
54aff467 284 init_interp();
ac27b0f5 285 PL_perl_destruct_level = 1;
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286#else
287 if (PL_perl_destruct_level > 0)
288 init_interp();
289#endif
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290 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
291
34caed6d
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292 /* set read-only and try to insure than we wont see REFCNT==0
293 very often */
294
295 SvREADONLY_on(&PL_sv_undef);
296 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
297
298 sv_setpv(&PL_sv_no,PL_No);
299 /* value lookup in void context - happens to have the side effect
300 of caching the numeric forms. */
301 SvIV(&PL_sv_no);
302 SvNV(&PL_sv_no);
303 SvREADONLY_on(&PL_sv_no);
304 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
305
306 sv_setpv(&PL_sv_yes,PL_Yes);
307 SvIV(&PL_sv_yes);
308 SvNV(&PL_sv_yes);
309 SvREADONLY_on(&PL_sv_yes);
310 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
311
312 SvREADONLY_on(&PL_sv_placeholder);
313 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
314
315 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
ca0c25f6 316#ifdef PERL_USES_PL_PIDSTATUS
34caed6d 317 PL_pidstatus = newHV();
ca0c25f6 318#endif
79072805 319
396482e1 320 PL_rs = newSVpvs("\n");
dc92893f 321
cea2e8a9 322 init_stacks();
79072805 323
748a9306 324 init_ids();
a5f75d66 325
312caa8e 326 JMPENV_BOOTSTRAP;
f86702cc
PP
327 STATUS_ALL_SUCCESS;
328
0672f40e 329 init_i18nl10n(1);
36477c24 330 SET_NUMERIC_STANDARD();
0b5b802d 331
ab821d7f 332#if defined(LOCAL_PATCH_COUNT)
3280af22 333 PL_localpatches = local_patches; /* For possible -v */
ab821d7f
PP
334#endif
335
52853b95
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336#ifdef HAVE_INTERP_INTERN
337 sys_intern_init();
338#endif
339
3a1ee7e8 340 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 341
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342 PL_fdpid = newAV(); /* for remembering popen pids by fd */
343 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
396482e1 344 PL_errors = newSVpvs("");
48c6b404 345 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
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346 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
347 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
1fcf4c12 348#ifdef USE_ITHREADS
29a861e7
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349 /* First entry is an array of empty elements */
350 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
13137afc 351 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 352#endif
e5dd39fc 353#ifdef USE_REENTRANT_API
59bd0823 354 Perl_reentrant_init(aTHX);
e5dd39fc 355#endif
3d47000e
AB
356
357 /* Note that strtab is a rather special HV. Assumptions are made
358 about not iterating on it, and not adding tie magic to it.
359 It is properly deallocated in perl_destruct() */
360 PL_strtab = newHV();
361
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AB
362 HvSHAREKEYS_off(PL_strtab); /* mandatory */
363 hv_ksplit(PL_strtab, 512);
364
0631ea03
AB
365#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
366 _dyld_lookup_and_bind
367 ("__environ", (unsigned long *) &environ_pointer, NULL);
368#endif /* environ */
369
2f42fcb0
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370#ifndef PERL_MICRO
371# ifdef USE_ENVIRON_ARRAY
0631ea03 372 PL_origenviron = environ;
2f42fcb0 373# endif
0631ea03
AB
374#endif
375
5311654c 376 /* Use sysconf(_SC_CLK_TCK) if available, if not
dbc1d986 377 * available or if the sysconf() fails, use the HZ.
27da23d5
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378 * BeOS has those, but returns the wrong value.
379 * The HZ if not originally defined has been by now
380 * been defined as CLK_TCK, if available. */
dbc1d986 381#if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
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JH
382 PL_clocktick = sysconf(_SC_CLK_TCK);
383 if (PL_clocktick <= 0)
384#endif
385 PL_clocktick = HZ;
386
081fc587
AB
387 PL_stashcache = newHV();
388
8cb289bd 389 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
e6830b13 390 (int)PERL_VERSION, (int)PERL_SUBVERSION);
d7aa5382 391
27da23d5
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392#ifdef HAS_MMAP
393 if (!PL_mmap_page_size) {
394#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
395 {
396 SETERRNO(0, SS_NORMAL);
397# ifdef _SC_PAGESIZE
398 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
399# else
400 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
401# endif
402 if ((long) PL_mmap_page_size < 0) {
403 if (errno) {
44f8325f 404 SV * const error = ERRSV;
d4c19fe8 405 SvUPGRADE(error, SVt_PV);
0510663f 406 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
27da23d5
JH
407 }
408 else
409 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
410 }
411 }
412#else
413# ifdef HAS_GETPAGESIZE
414 PL_mmap_page_size = getpagesize();
415# else
416# if defined(I_SYS_PARAM) && defined(PAGESIZE)
417 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
418# endif
419# endif
420#endif
421 if (PL_mmap_page_size <= 0)
422 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
423 (IV) PL_mmap_page_size);
424 }
425#endif /* HAS_MMAP */
426
427#if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
428 PL_timesbase.tms_utime = 0;
429 PL_timesbase.tms_stime = 0;
430 PL_timesbase.tms_cutime = 0;
431 PL_timesbase.tms_cstime = 0;
432#endif
433
8990e307 434 ENTER;
79072805
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435}
436
954c1994 437/*
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438=for apidoc nothreadhook
439
440Stub that provides thread hook for perl_destruct when there are
441no threads.
442
443=cut
444*/
445
446int
4e9e3734 447Perl_nothreadhook(pTHX)
62375a60 448{
96a5add6 449 PERL_UNUSED_CONTEXT;
62375a60
NIS
450 return 0;
451}
452
41e4abd8
NC
453#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
454void
455Perl_dump_sv_child(pTHX_ SV *sv)
456{
457 ssize_t got;
bf357333
NC
458 const int sock = PL_dumper_fd;
459 const int debug_fd = PerlIO_fileno(Perl_debug_log);
bf357333
NC
460 union control_un control;
461 struct msghdr msg;
808ad2d0 462 struct iovec vec[2];
bf357333 463 struct cmsghdr *cmptr;
808ad2d0
NC
464 int returned_errno;
465 unsigned char buffer[256];
41e4abd8 466
bf357333 467 if(sock == -1 || debug_fd == -1)
41e4abd8
NC
468 return;
469
470 PerlIO_flush(Perl_debug_log);
471
bf357333
NC
472 /* All these shenanigans are to pass a file descriptor over to our child for
473 it to dump out to. We can't let it hold open the file descriptor when it
474 forks, as the file descriptor it will dump to can turn out to be one end
475 of pipe that some other process will wait on for EOF. (So as it would
b293a5f8 476 be open, the wait would be forever.) */
bf357333
NC
477
478 msg.msg_control = control.control;
479 msg.msg_controllen = sizeof(control.control);
480 /* We're a connected socket so we don't need a destination */
481 msg.msg_name = NULL;
482 msg.msg_namelen = 0;
483 msg.msg_iov = vec;
808ad2d0 484 msg.msg_iovlen = 1;
bf357333
NC
485
486 cmptr = CMSG_FIRSTHDR(&msg);
487 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
488 cmptr->cmsg_level = SOL_SOCKET;
489 cmptr->cmsg_type = SCM_RIGHTS;
490 *((int *)CMSG_DATA(cmptr)) = 1;
491
492 vec[0].iov_base = (void*)&sv;
493 vec[0].iov_len = sizeof(sv);
494 got = sendmsg(sock, &msg, 0);
41e4abd8
NC
495
496 if(got < 0) {
bf357333 497 perror("Debug leaking scalars parent sendmsg failed");
41e4abd8
NC
498 abort();
499 }
bf357333
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500 if(got < sizeof(sv)) {
501 perror("Debug leaking scalars parent short sendmsg");
41e4abd8
NC
502 abort();
503 }
504
808ad2d0
NC
505 /* Return protocol is
506 int: errno value
507 unsigned char: length of location string (0 for empty)
508 unsigned char*: string (not terminated)
509 */
510 vec[0].iov_base = (void*)&returned_errno;
511 vec[0].iov_len = sizeof(returned_errno);
512 vec[1].iov_base = buffer;
513 vec[1].iov_len = 1;
514
515 got = readv(sock, vec, 2);
41e4abd8
NC
516
517 if(got < 0) {
518 perror("Debug leaking scalars parent read failed");
808ad2d0 519 PerlIO_flush(PerlIO_stderr());
41e4abd8
NC
520 abort();
521 }
808ad2d0 522 if(got < sizeof(returned_errno) + 1) {
41e4abd8 523 perror("Debug leaking scalars parent short read");
808ad2d0 524 PerlIO_flush(PerlIO_stderr());
41e4abd8
NC
525 abort();
526 }
527
808ad2d0
NC
528 if (*buffer) {
529 got = read(sock, buffer + 1, *buffer);
530 if(got < 0) {
531 perror("Debug leaking scalars parent read 2 failed");
532 PerlIO_flush(PerlIO_stderr());
533 abort();
534 }
535
536 if(got < *buffer) {
537 perror("Debug leaking scalars parent short read 2");
538 PerlIO_flush(PerlIO_stderr());
539 abort();
540 }
541 }
542
543 if (returned_errno || *buffer) {
544 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
545 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
546 returned_errno, strerror(returned_errno));
41e4abd8
NC
547 }
548}
549#endif
550
62375a60 551/*
954c1994
GS
552=for apidoc perl_destruct
553
554Shuts down a Perl interpreter. See L<perlembed>.
555
556=cut
557*/
558
31d77e54 559int
0cb96387 560perl_destruct(pTHXx)
79072805 561{
27da23d5 562 dVAR;
8ea43dc8 563 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 564 HV *hv;
2aa47728 565#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
2aa47728
NC
566 pid_t child;
567#endif
8990e307 568
ed6c66dd 569 PERL_UNUSED_ARG(my_perl);
9d4ba2ae 570
7766f137
GS
571 /* wait for all pseudo-forked children to finish */
572 PERL_WAIT_FOR_CHILDREN;
573
3280af22 574 destruct_level = PL_perl_destruct_level;
4633a7c4
LW
575#ifdef DEBUGGING
576 {
9d4ba2ae
AL
577 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
578 if (s) {
e1ec3a88 579 const int i = atoi(s);
5f05dabc
PP
580 if (destruct_level < i)
581 destruct_level = i;
582 }
4633a7c4
LW
583 }
584#endif
585
27da23d5 586 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB
587 dJMPENV;
588 int x = 0;
589
590 JMPENV_PUSH(x);
1b6737cc 591 PERL_UNUSED_VAR(x);
f3faeb53
AB
592 if (PL_endav && !PL_minus_c)
593 call_list(PL_scopestack_ix, PL_endav);
594 JMPENV_POP;
26f423df 595 }
f3faeb53 596 LEAVE;
a0d0e21e
LW
597 FREETMPS;
598
e00b64d4 599 /* Need to flush since END blocks can produce output */
f13a2bc0 600 my_fflush_all();
e00b64d4 601
62375a60
NIS
602 if (CALL_FPTR(PL_threadhook)(aTHX)) {
603 /* Threads hook has vetoed further cleanup */
c301d606 604 PL_veto_cleanup = TRUE;
37038d91 605 return STATUS_EXIT;
62375a60
NIS
606 }
607
2aa47728
NC
608#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
609 if (destruct_level != 0) {
610 /* Fork here to create a child. Our child's job is to preserve the
611 state of scalars prior to destruction, so that we can instruct it
612 to dump any scalars that we later find have leaked.
613 There's no subtlety in this code - it assumes POSIX, and it doesn't
614 fail gracefully */
615 int fd[2];
616
617 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
618 perror("Debug leaking scalars socketpair failed");
619 abort();
620 }
621
622 child = fork();
623 if(child == -1) {
624 perror("Debug leaking scalars fork failed");
625 abort();
626 }
627 if (!child) {
628 /* We are the child */
3125a5a4
NC
629 const int sock = fd[1];
630 const int debug_fd = PerlIO_fileno(Perl_debug_log);
631 int f;
808ad2d0
NC
632 const char *where;
633 /* Our success message is an integer 0, and a char 0 */
634 static const char success[sizeof(int) + 1];
3125a5a4 635
2aa47728 636 close(fd[0]);
2aa47728 637
3125a5a4
NC
638 /* We need to close all other file descriptors otherwise we end up
639 with interesting hangs, where the parent closes its end of a
640 pipe, and sits waiting for (another) child to terminate. Only
641 that child never terminates, because it never gets EOF, because
bf357333
NC
642 we also have the far end of the pipe open. We even need to
643 close the debugging fd, because sometimes it happens to be one
644 end of a pipe, and a process is waiting on the other end for
645 EOF. Normally it would be closed at some point earlier in
646 destruction, but if we happen to cause the pipe to remain open,
647 EOF never occurs, and we get an infinite hang. Hence all the
648 games to pass in a file descriptor if it's actually needed. */
3125a5a4
NC
649
650 f = sysconf(_SC_OPEN_MAX);
651 if(f < 0) {
808ad2d0
NC
652 where = "sysconf failed";
653 goto abort;
3125a5a4
NC
654 }
655 while (f--) {
656 if (f == sock)
657 continue;
3125a5a4
NC
658 close(f);
659 }
660
2aa47728
NC
661 while (1) {
662 SV *target;
bf357333
NC
663 union control_un control;
664 struct msghdr msg;
665 struct iovec vec[1];
666 struct cmsghdr *cmptr;
667 ssize_t got;
668 int got_fd;
669
670 msg.msg_control = control.control;
671 msg.msg_controllen = sizeof(control.control);
672 /* We're a connected socket so we don't need a source */
673 msg.msg_name = NULL;
674 msg.msg_namelen = 0;
675 msg.msg_iov = vec;
676 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
677
678 vec[0].iov_base = (void*)&target;
679 vec[0].iov_len = sizeof(target);
680
681 got = recvmsg(sock, &msg, 0);
2aa47728
NC
682
683 if(got == 0)
684 break;
685 if(got < 0) {
808ad2d0
NC
686 where = "recv failed";
687 goto abort;
2aa47728
NC
688 }
689 if(got < sizeof(target)) {
808ad2d0
NC
690 where = "short recv";
691 goto abort;
2aa47728 692 }
bf357333 693
808ad2d0
NC
694 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
695 where = "no cmsg";
696 goto abort;
697 }
698 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
699 where = "wrong cmsg_len";
700 goto abort;
701 }
702 if(cmptr->cmsg_level != SOL_SOCKET) {
703 where = "wrong cmsg_level";
704 goto abort;
705 }
706 if(cmptr->cmsg_type != SCM_RIGHTS) {
707 where = "wrong cmsg_type";
708 goto abort;
709 }
bf357333
NC
710
711 got_fd = *(int*)CMSG_DATA(cmptr);
712 /* For our last little bit of trickery, put the file descriptor
713 back into Perl_debug_log, as if we never actually closed it
714 */
808ad2d0
NC
715 if(got_fd != debug_fd) {
716 if (dup2(got_fd, debug_fd) == -1) {
717 where = "dup2";
718 goto abort;
719 }
720 }
2aa47728 721 sv_dump(target);
bf357333 722
2aa47728
NC
723 PerlIO_flush(Perl_debug_log);
724
808ad2d0 725 got = write(sock, &success, sizeof(success));
2aa47728
NC
726
727 if(got < 0) {
808ad2d0
NC
728 where = "write failed";
729 goto abort;
2aa47728 730 }
808ad2d0
NC
731 if(got < sizeof(success)) {
732 where = "short write";
733 goto abort;
2aa47728
NC
734 }
735 }
736 _exit(0);
808ad2d0
NC
737 abort:
738 {
739 int send_errno = errno;
740 unsigned char length = (unsigned char) strlen(where);
741 struct iovec failure[3] = {
742 {(void*)&send_errno, sizeof(send_errno)},
743 {&length, 1},
744 {(void*)where, length}
745 };
746 int got = writev(sock, failure, 3);
747 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
748 in the parent if we try to read from the socketpair after the
749 child has exited, even if there was data to read.
750 So sleep a bit to give the parent a fighting chance of
751 reading the data. */
752 sleep(2);
753 _exit((got == -1) ? errno : 0);
754 }
bf357333 755 /* End of child. */
2aa47728 756 }
41e4abd8 757 PL_dumper_fd = fd[0];
2aa47728
NC
758 close(fd[1]);
759 }
760#endif
761
ff0cee69
PP
762 /* We must account for everything. */
763
764 /* Destroy the main CV and syntax tree */
17fbfdf6
NC
765 /* Do this now, because destroying ops can cause new SVs to be generated
766 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
767 PL_curcop to point to a valid op from which the filename structure
768 member is copied. */
769 PL_curcop = &PL_compiling;
3280af22 770 if (PL_main_root) {
4e380990
DM
771 /* ensure comppad/curpad to refer to main's pad */
772 if (CvPADLIST(PL_main_cv)) {
773 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
774 }
3280af22 775 op_free(PL_main_root);
5f66b61c 776 PL_main_root = NULL;
a0d0e21e 777 }
5f66b61c 778 PL_main_start = NULL;
3280af22 779 SvREFCNT_dec(PL_main_cv);
601f1833 780 PL_main_cv = NULL;
24d3c518 781 PL_dirty = TRUE;
ff0cee69 782
13621cfb
NIS
783 /* Tell PerlIO we are about to tear things apart in case
784 we have layers which are using resources that should
785 be cleaned up now.
786 */
787
788 PerlIO_destruct(aTHX);
789
3280af22 790 if (PL_sv_objcount) {
a0d0e21e
LW
791 /*
792 * Try to destruct global references. We do this first so that the
793 * destructors and destructees still exist. Some sv's might remain.
794 * Non-referenced objects are on their own.
795 */
a0d0e21e 796 sv_clean_objs();
bf9cdc68 797 PL_sv_objcount = 0;
a0de6cf5 798 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
a0714e2c 799 PL_defoutgv = NULL; /* may have been freed */
8990e307
LW
800 }
801
5cd24f17 802 /* unhook hooks which will soon be, or use, destroyed data */
3280af22 803 SvREFCNT_dec(PL_warnhook);
a0714e2c 804 PL_warnhook = NULL;
3280af22 805 SvREFCNT_dec(PL_diehook);
a0714e2c 806 PL_diehook = NULL;
5cd24f17 807
4b556e6c 808 /* call exit list functions */
3280af22 809 while (PL_exitlistlen-- > 0)
acfe0abc 810 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 811
3280af22 812 Safefree(PL_exitlist);
4b556e6c 813
1c4916e5
CB
814 PL_exitlist = NULL;
815 PL_exitlistlen = 0;
816
551a8b83 817 /* jettison our possibly duplicated environment */
4b647fb0
DM
818 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
819 * so we certainly shouldn't free it here
820 */
2f42fcb0 821#ifndef PERL_MICRO
4b647fb0 822#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
50acdf95 823 if (environ != PL_origenviron && !PL_use_safe_putenv
4efc5df6
GS
824#ifdef USE_ITHREADS
825 /* only main thread can free environ[0] contents */
826 && PL_curinterp == aTHX
827#endif
828 )
829 {
551a8b83
JH
830 I32 i;
831
832 for (i = 0; environ[i]; i++)
4b420006 833 safesysfree(environ[i]);
0631ea03 834
4b420006
JH
835 /* Must use safesysfree() when working with environ. */
836 safesysfree(environ);
551a8b83
JH
837
838 environ = PL_origenviron;
839 }
840#endif
2f42fcb0 841#endif /* !PERL_MICRO */
551a8b83 842
30985c42
JH
843 if (destruct_level == 0) {
844
845 DEBUG_P(debprofdump());
846
847#if defined(PERLIO_LAYERS)
848 /* No more IO - including error messages ! */
849 PerlIO_cleanup(aTHX);
850#endif
851
852 CopFILE_free(&PL_compiling);
853 CopSTASH_free(&PL_compiling);
854
855 /* The exit() function will do everything that needs doing. */
856 return STATUS_EXIT;
857 }
858
804ffa60 859 /* reset so print() ends up where we expect */
a0714e2c 860 setdefout(NULL);
804ffa60 861
5f8cb046
DM
862#ifdef USE_ITHREADS
863 /* the syntax tree is shared between clones
864 * so op_free(PL_main_root) only ReREFCNT_dec's
865 * REGEXPs in the parent interpreter
866 * we need to manually ReREFCNT_dec for the clones
867 */
868 {
869 I32 i = AvFILLp(PL_regex_padav) + 1;
c4420975 870 SV * const * const ary = AvARRAY(PL_regex_padav);
5f8cb046
DM
871
872 while (i) {
c4420975 873 SV * const resv = ary[--i];
35061a7e
DM
874
875 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 876 /* this is PL_reg_curpm, already freed
35061a7e
DM
877 * flag is set in regexec.c:S_regtry
878 */
879 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 880 }
1cc8b4c5
AB
881 else if(SvREPADTMP(resv)) {
882 SvREPADTMP_off(resv);
883 }
a560f29b
NC
884 else if(SvIOKp(resv)) {
885 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
5f8cb046
DM
886 ReREFCNT_dec(re);
887 }
888 }
889 }
890 SvREFCNT_dec(PL_regex_padav);
7d49f689 891 PL_regex_padav = NULL;
5f8cb046
DM
892 PL_regex_pad = NULL;
893#endif
894
081fc587
AB
895 SvREFCNT_dec((SV*) PL_stashcache);
896 PL_stashcache = NULL;
897
5f05dabc
PP
898 /* loosen bonds of global variables */
899
2f9285f8
DM
900 /* XXX can PL_parser still be non-null here? */
901 if(PL_parser && PL_parser->rsfp) {
902 (void)PerlIO_close(PL_parser->rsfp);
903 PL_parser->rsfp = NULL;
8ebc5c01
PP
904 }
905
84386e14
RGS
906 if (PL_minus_F) {
907 Safefree(PL_splitstr);
908 PL_splitstr = NULL;
909 }
910
8ebc5c01 911 /* switches */
3280af22
NIS
912 PL_preprocess = FALSE;
913 PL_minus_n = FALSE;
914 PL_minus_p = FALSE;
915 PL_minus_l = FALSE;
916 PL_minus_a = FALSE;
917 PL_minus_F = FALSE;
918 PL_doswitches = FALSE;
599cee73 919 PL_dowarn = G_WARN_OFF;
3280af22
NIS
920 PL_doextract = FALSE;
921 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
922 PL_unsafe = FALSE;
923
924 Safefree(PL_inplace);
bd61b366 925 PL_inplace = NULL;
a7cb1f99 926 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
927
928 if (PL_e_script) {
929 SvREFCNT_dec(PL_e_script);
a0714e2c 930 PL_e_script = NULL;
8ebc5c01
PP
931 }
932
bf9cdc68
RG
933 PL_perldb = 0;
934
8ebc5c01
PP
935 /* magical thingies */
936
7889fe52 937 SvREFCNT_dec(PL_ofs_sv); /* $, */
a0714e2c 938 PL_ofs_sv = NULL;
5f05dabc 939
7889fe52 940 SvREFCNT_dec(PL_ors_sv); /* $\ */
a0714e2c 941 PL_ors_sv = NULL;
8ebc5c01 942
3280af22 943 SvREFCNT_dec(PL_rs); /* $/ */
a0714e2c 944 PL_rs = NULL;
dc92893f 945
d33b2eba 946 Safefree(PL_osname); /* $^O */
bd61b366 947 PL_osname = NULL;
5f05dabc 948
3280af22 949 SvREFCNT_dec(PL_statname);
a0714e2c
SS
950 PL_statname = NULL;
951 PL_statgv = NULL;
5f05dabc 952
8ebc5c01
PP
953 /* defgv, aka *_ should be taken care of elsewhere */
954
8ebc5c01 955 /* clean up after study() */
3280af22 956 SvREFCNT_dec(PL_lastscream);
a0714e2c 957 PL_lastscream = NULL;
3280af22
NIS
958 Safefree(PL_screamfirst);
959 PL_screamfirst = 0;
960 Safefree(PL_screamnext);
961 PL_screamnext = 0;
8ebc5c01 962
7d5ea4e7
GS
963 /* float buffer */
964 Safefree(PL_efloatbuf);
bd61b366 965 PL_efloatbuf = NULL;
7d5ea4e7
GS
966 PL_efloatsize = 0;
967
8ebc5c01 968 /* startup and shutdown function lists */
3280af22 969 SvREFCNT_dec(PL_beginav);
5a837c8f 970 SvREFCNT_dec(PL_beginav_save);
3280af22 971 SvREFCNT_dec(PL_endav);
7d30b5c4 972 SvREFCNT_dec(PL_checkav);
ece599bd 973 SvREFCNT_dec(PL_checkav_save);
3c10abe3
AG
974 SvREFCNT_dec(PL_unitcheckav);
975 SvREFCNT_dec(PL_unitcheckav_save);
3280af22 976 SvREFCNT_dec(PL_initav);
7d49f689
NC
977 PL_beginav = NULL;
978 PL_beginav_save = NULL;
979 PL_endav = NULL;
980 PL_checkav = NULL;
981 PL_checkav_save = NULL;
3c10abe3
AG
982 PL_unitcheckav = NULL;
983 PL_unitcheckav_save = NULL;
7d49f689 984 PL_initav = NULL;
5618dfe8 985
8ebc5c01 986 /* shortcuts just get cleared */
a0714e2c
SS
987 PL_envgv = NULL;
988 PL_incgv = NULL;
989 PL_hintgv = NULL;
990 PL_errgv = NULL;
991 PL_argvgv = NULL;
992 PL_argvoutgv = NULL;
993 PL_stdingv = NULL;
994 PL_stderrgv = NULL;
995 PL_last_in_gv = NULL;
996 PL_replgv = NULL;
997 PL_DBgv = NULL;
998 PL_DBline = NULL;
999 PL_DBsub = NULL;
1000 PL_DBsingle = NULL;
1001 PL_DBtrace = NULL;
1002 PL_DBsignal = NULL;
601f1833 1003 PL_DBcv = NULL;
7d49f689 1004 PL_dbargs = NULL;
5c284bb0 1005 PL_debstash = NULL;
8ebc5c01 1006
7a1c5554 1007 SvREFCNT_dec(PL_argvout_stack);
7d49f689 1008 PL_argvout_stack = NULL;
8ebc5c01 1009
5c831c24 1010 SvREFCNT_dec(PL_modglobal);
5c284bb0 1011 PL_modglobal = NULL;
5c831c24 1012 SvREFCNT_dec(PL_preambleav);
7d49f689 1013 PL_preambleav = NULL;
5c831c24 1014 SvREFCNT_dec(PL_subname);
a0714e2c 1015 PL_subname = NULL;
ca0c25f6 1016#ifdef PERL_USES_PL_PIDSTATUS
5c831c24 1017 SvREFCNT_dec(PL_pidstatus);
5c284bb0 1018 PL_pidstatus = NULL;
ca0c25f6 1019#endif
5c831c24 1020 SvREFCNT_dec(PL_toptarget);
a0714e2c 1021 PL_toptarget = NULL;
5c831c24 1022 SvREFCNT_dec(PL_bodytarget);
a0714e2c
SS
1023 PL_bodytarget = NULL;
1024 PL_formtarget = NULL;
5c831c24 1025
d33b2eba 1026 /* free locale stuff */
b9582b6a 1027#ifdef USE_LOCALE_COLLATE
d33b2eba 1028 Safefree(PL_collation_name);
bd61b366 1029 PL_collation_name = NULL;
b9582b6a 1030#endif
d33b2eba 1031
b9582b6a 1032#ifdef USE_LOCALE_NUMERIC
d33b2eba 1033 Safefree(PL_numeric_name);
bd61b366 1034 PL_numeric_name = NULL;
a453c169 1035 SvREFCNT_dec(PL_numeric_radix_sv);
a0714e2c 1036 PL_numeric_radix_sv = NULL;
b9582b6a 1037#endif
d33b2eba 1038
5c831c24
GS
1039 /* clear utf8 character classes */
1040 SvREFCNT_dec(PL_utf8_alnum);
1041 SvREFCNT_dec(PL_utf8_alnumc);
1042 SvREFCNT_dec(PL_utf8_ascii);
1043 SvREFCNT_dec(PL_utf8_alpha);
1044 SvREFCNT_dec(PL_utf8_space);
1045 SvREFCNT_dec(PL_utf8_cntrl);
1046 SvREFCNT_dec(PL_utf8_graph);
1047 SvREFCNT_dec(PL_utf8_digit);
1048 SvREFCNT_dec(PL_utf8_upper);
1049 SvREFCNT_dec(PL_utf8_lower);
1050 SvREFCNT_dec(PL_utf8_print);
1051 SvREFCNT_dec(PL_utf8_punct);
1052 SvREFCNT_dec(PL_utf8_xdigit);
1053 SvREFCNT_dec(PL_utf8_mark);
1054 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 1055 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 1056 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 1057 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH
1058 SvREFCNT_dec(PL_utf8_idstart);
1059 SvREFCNT_dec(PL_utf8_idcont);
a0714e2c
SS
1060 PL_utf8_alnum = NULL;
1061 PL_utf8_alnumc = NULL;
1062 PL_utf8_ascii = NULL;
1063 PL_utf8_alpha = NULL;
1064 PL_utf8_space = NULL;
1065 PL_utf8_cntrl = NULL;
1066 PL_utf8_graph = NULL;
1067 PL_utf8_digit = NULL;
1068 PL_utf8_upper = NULL;
1069 PL_utf8_lower = NULL;
1070 PL_utf8_print = NULL;
1071 PL_utf8_punct = NULL;
1072 PL_utf8_xdigit = NULL;
1073 PL_utf8_mark = NULL;
1074 PL_utf8_toupper = NULL;
1075 PL_utf8_totitle = NULL;
1076 PL_utf8_tolower = NULL;
1077 PL_utf8_tofold = NULL;
1078 PL_utf8_idstart = NULL;
1079 PL_utf8_idcont = NULL;
5c831c24 1080
971a9dd3 1081 if (!specialWARN(PL_compiling.cop_warnings))
72dc9ed5 1082 PerlMemShared_free(PL_compiling.cop_warnings);
a0714e2c 1083 PL_compiling.cop_warnings = NULL;
c28fe1ec
NC
1084 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1085 PL_compiling.cop_hints_hash = NULL;
05ec9bb3
NIS
1086 CopFILE_free(&PL_compiling);
1087 CopSTASH_free(&PL_compiling);
5c831c24 1088
a0d0e21e 1089 /* Prepare to destruct main symbol table. */
5f05dabc 1090
3280af22
NIS
1091 hv = PL_defstash;
1092 PL_defstash = 0;
a0d0e21e 1093 SvREFCNT_dec(hv);
5c831c24 1094 SvREFCNT_dec(PL_curstname);
a0714e2c 1095 PL_curstname = NULL;
a0d0e21e 1096
5a844595
GS
1097 /* clear queued errors */
1098 SvREFCNT_dec(PL_errors);
a0714e2c 1099 PL_errors = NULL;
5a844595 1100
dd69841b
BB
1101 SvREFCNT_dec(PL_isarev);
1102
a0d0e21e 1103 FREETMPS;
0453d815 1104 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 1105 if (PL_scopestack_ix != 0)
9014280d 1106 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 1107 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
1108 (long)PL_scopestack_ix);
1109 if (PL_savestack_ix != 0)
9014280d 1110 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 1111 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
1112 (long)PL_savestack_ix);
1113 if (PL_tmps_floor != -1)
9014280d 1114 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 1115 (long)PL_tmps_floor + 1);
a0d0e21e 1116 if (cxstack_ix != -1)
9014280d 1117 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 1118 (long)cxstack_ix + 1);
a0d0e21e 1119 }
8990e307
LW
1120
1121 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 1122 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 1123 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
1124
1125 /* the 2 is for PL_fdpid and PL_strtab */
1126 while (PL_sv_count > 2 && sv_clean_all())
1127 ;
1128
d33b2eba
GS
1129 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1130 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
1131 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1132 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 1133
d4777f27
GS
1134 AvREAL_off(PL_fdpid); /* no surviving entries */
1135 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
7d49f689 1136 PL_fdpid = NULL;
d33b2eba 1137
6c644e78
GS
1138#ifdef HAVE_INTERP_INTERN
1139 sys_intern_clear();
1140#endif
1141
6e72f9df
PP
1142 /* Destruct the global string table. */
1143 {
1144 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1145 * so that sv_free() won't fail on them.
80459961
NC
1146 * Now that the global string table is using a single hunk of memory
1147 * for both HE and HEK, we either need to explicitly unshare it the
1148 * correct way, or actually free things here.
6e72f9df 1149 */
80459961
NC
1150 I32 riter = 0;
1151 const I32 max = HvMAX(PL_strtab);
c4420975 1152 HE * const * const array = HvARRAY(PL_strtab);
80459961
NC
1153 HE *hent = array[0];
1154
6e72f9df 1155 for (;;) {
0453d815 1156 if (hent && ckWARN_d(WARN_INTERNAL)) {
44f8325f 1157 HE * const next = HeNEXT(hent);
9014280d 1158 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
44f8325f 1159 "Unbalanced string table refcount: (%ld) for \"%s\"",
de616631 1160 (long)hent->he_valu.hent_refcount, HeKEY(hent));
80459961
NC
1161 Safefree(hent);
1162 hent = next;
6e72f9df
PP
1163 }
1164 if (!hent) {
1165 if (++riter > max)
1166 break;
1167 hent = array[riter];
1168 }
1169 }
80459961
NC
1170
1171 Safefree(array);
1172 HvARRAY(PL_strtab) = 0;
1173 HvTOTALKEYS(PL_strtab) = 0;
1174 HvFILL(PL_strtab) = 0;
6e72f9df 1175 }
3280af22 1176 SvREFCNT_dec(PL_strtab);
6e72f9df 1177
e652bb2f 1178#ifdef USE_ITHREADS
c21d1a0f 1179 /* free the pointer tables used for cloning */
a0739874 1180 ptr_table_free(PL_ptr_table);
bf9cdc68 1181 PL_ptr_table = (PTR_TBL_t*)NULL;
53186e96 1182#endif
a0739874 1183
d33b2eba
GS
1184 /* free special SVs */
1185
1186 SvREFCNT(&PL_sv_yes) = 0;
1187 sv_clear(&PL_sv_yes);
1188 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 1189 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
1190
1191 SvREFCNT(&PL_sv_no) = 0;
1192 sv_clear(&PL_sv_no);
1193 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 1194 SvFLAGS(&PL_sv_no) = 0;
01724ea0 1195
9f375a43
DM
1196 {
1197 int i;
1198 for (i=0; i<=2; i++) {
1199 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1200 sv_clear(PERL_DEBUG_PAD(i));
1201 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1202 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1203 }
1204 }
1205
0453d815 1206 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 1207 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 1208
eba0f806
DM
1209#ifdef DEBUG_LEAKING_SCALARS
1210 if (PL_sv_count != 0) {
1211 SV* sva;
1212 SV* sv;
1213 register SV* svend;
1214
1215 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1216 svend = &sva[SvREFCNT(sva)];
1217 for (sv = sva + 1; sv < svend; ++sv) {
1218 if (SvTYPE(sv) != SVTYPEMASK) {
a548cda8 1219 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
61b61456 1220 " flags=0x%"UVxf
fd0854ff
DM
1221 " refcnt=%"UVuf pTHX__FORMAT "\n"
1222 "\tallocated at %s:%d %s %s%s\n",
6c9570dc 1223 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
fd0854ff
DM
1224 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1225 sv->sv_debug_line,
1226 sv->sv_debug_inpad ? "for" : "by",
1227 sv->sv_debug_optype ?
1228 PL_op_name[sv->sv_debug_optype]: "(none)",
1229 sv->sv_debug_cloned ? " (cloned)" : ""
1230 );
2aa47728 1231#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
41e4abd8 1232 Perl_dump_sv_child(aTHX_ sv);
2aa47728 1233#endif
eba0f806
DM
1234 }
1235 }
1236 }
1237 }
2aa47728
NC
1238#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1239 {
1240 int status;
1241 fd_set rset;
1242 /* Wait for up to 4 seconds for child to terminate.
1243 This seems to be the least effort way of timing out on reaping
1244 its exit status. */
1245 struct timeval waitfor = {4, 0};
41e4abd8 1246 int sock = PL_dumper_fd;
2aa47728
NC
1247
1248 shutdown(sock, 1);
1249 FD_ZERO(&rset);
1250 FD_SET(sock, &rset);
1251 select(sock + 1, &rset, NULL, NULL, &waitfor);
1252 waitpid(child, &status, WNOHANG);
1253 close(sock);
1254 }
1255#endif
eba0f806 1256#endif
bf9cdc68 1257 PL_sv_count = 0;
eba0f806 1258
f1fac472
NC
1259#ifdef PERL_DEBUG_READONLY_OPS
1260 free(PL_slabs);
1261 PL_slabs = NULL;
1262 PL_slab_count = 0;
1263#endif
eba0f806 1264
56a2bab7 1265#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
1266 /* No more IO - including error messages ! */
1267 PerlIO_cleanup(aTHX);
1268#endif
1269
9f4bd222 1270 /* sv_undef needs to stay immortal until after PerlIO_cleanup
a0714e2c 1271 as currently layers use it rather than NULL as a marker
9f4bd222
NIS
1272 for no arg - and will try and SvREFCNT_dec it.
1273 */
1274 SvREFCNT(&PL_sv_undef) = 0;
1275 SvREADONLY_off(&PL_sv_undef);
1276
3280af22 1277 Safefree(PL_origfilename);
bd61b366 1278 PL_origfilename = NULL;
3280af22 1279 Safefree(PL_reg_start_tmp);
bf9cdc68
RG
1280 PL_reg_start_tmp = (char**)NULL;
1281 PL_reg_start_tmpl = 0;
43c5f42d 1282 Safefree(PL_reg_curpm);
82ba1be6 1283 Safefree(PL_reg_poscache);
dd28f7bb 1284 free_tied_hv_pool();
3280af22 1285 Safefree(PL_op_mask);
cf36064f 1286 Safefree(PL_psig_ptr);
bf9cdc68 1287 PL_psig_ptr = (SV**)NULL;
cf36064f 1288 Safefree(PL_psig_name);
bf9cdc68 1289 PL_psig_name = (SV**)NULL;
2c2666fc 1290 Safefree(PL_bitcount);
bd61b366 1291 PL_bitcount = NULL;
ce08f86c 1292 Safefree(PL_psig_pend);
bf9cdc68 1293 PL_psig_pend = (int*)NULL;
a0714e2c 1294 PL_formfeed = NULL;
6e72f9df 1295 nuke_stacks();
bf9cdc68
RG
1296 PL_tainting = FALSE;
1297 PL_taint_warn = FALSE;
3280af22 1298 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
bf9cdc68 1299 PL_debug = 0;
ac27b0f5 1300
a0d0e21e 1301 DEBUG_P(debprofdump());
d33b2eba 1302
e5dd39fc 1303#ifdef USE_REENTRANT_API
10bc17b6 1304 Perl_reentrant_free(aTHX);
e5dd39fc
AB
1305#endif
1306
612f20c3
GS
1307 sv_free_arenas();
1308
5d9a96ca
DM
1309 while (PL_regmatch_slab) {
1310 regmatch_slab *s = PL_regmatch_slab;
1311 PL_regmatch_slab = PL_regmatch_slab->next;
1312 Safefree(s);
1313 }
1314
fc36a67e
PP
1315 /* As the absolutely last thing, free the non-arena SV for mess() */
1316
3280af22 1317 if (PL_mess_sv) {
f350b448
NC
1318 /* we know that type == SVt_PVMG */
1319
9c63abab 1320 /* it could have accumulated taint magic */
f350b448
NC
1321 MAGIC* mg;
1322 MAGIC* moremagic;
1323 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1324 moremagic = mg->mg_moremagic;
1325 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1326 && mg->mg_len >= 0)
1327 Safefree(mg->mg_ptr);
1328 Safefree(mg);
9c63abab 1329 }
f350b448 1330
fc36a67e 1331 /* we know that type >= SVt_PV */
8bd4d4c5 1332 SvPV_free(PL_mess_sv);
3280af22
NIS
1333 Safefree(SvANY(PL_mess_sv));
1334 Safefree(PL_mess_sv);
a0714e2c 1335 PL_mess_sv = NULL;
fc36a67e 1336 }
37038d91 1337 return STATUS_EXIT;
79072805
LW
1338}
1339
954c1994
GS
1340/*
1341=for apidoc perl_free
1342
1343Releases a Perl interpreter. See L<perlembed>.
1344
1345=cut
1346*/
1347
79072805 1348void
0cb96387 1349perl_free(pTHXx)
79072805 1350{
5174512c
NC
1351 dVAR;
1352
c301d606
DM
1353 if (PL_veto_cleanup)
1354 return;
1355
7cb608b5 1356#ifdef PERL_TRACK_MEMPOOL
55ef9aae
MHM
1357 {
1358 /*
1359 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1360 * value as we're probably hunting memory leaks then
1361 */
1362 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1363 if (!s || atoi(s) == 0) {
1364 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1365 thread at thread exit. */
1366 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1367 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1368 }
1369 }
7cb608b5
NC
1370#endif
1371
acfe0abc 1372#if defined(WIN32) || defined(NETWARE)
ce3e5b80 1373# if defined(PERL_IMPLICIT_SYS)
b36c9a52 1374 {
acfe0abc 1375# ifdef NETWARE
7af12a34 1376 void *host = nw_internal_host;
acfe0abc 1377# else
7af12a34 1378 void *host = w32_internal_host;
acfe0abc 1379# endif
7af12a34 1380 PerlMem_free(aTHXx);
acfe0abc 1381# ifdef NETWARE
7af12a34 1382 nw_delete_internal_host(host);
acfe0abc 1383# else
7af12a34 1384 win32_delete_internal_host(host);
acfe0abc 1385# endif
7af12a34 1386 }
1c0ca838
GS
1387# else
1388 PerlMem_free(aTHXx);
1389# endif
acfe0abc
GS
1390#else
1391 PerlMem_free(aTHXx);
76e3520e 1392#endif
79072805
LW
1393}
1394
b7f7fff6 1395#if defined(USE_ITHREADS)
aebd1ac7
GA
1396/* provide destructors to clean up the thread key when libperl is unloaded */
1397#ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1398
826955bd 1399#if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
aebd1ac7 1400#pragma fini "perl_fini"
666ad1ec
GA
1401#elif defined(__sun) && !defined(__GNUC__)
1402#pragma fini (perl_fini)
aebd1ac7
GA
1403#endif
1404
0dbb1585
AL
1405static void
1406#if defined(__GNUC__)
1407__attribute__((destructor))
aebd1ac7 1408#endif
de009b76 1409perl_fini(void)
aebd1ac7 1410{
27da23d5 1411 dVAR;
c301d606 1412 if (PL_curinterp && !PL_veto_cleanup)
aebd1ac7
GA
1413 FREE_THREAD_KEY;
1414}
1415
1416#endif /* WIN32 */
1417#endif /* THREADS */
1418
4b556e6c 1419void
864dbfa3 1420Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 1421{
97aff369 1422 dVAR;
3280af22
NIS
1423 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1424 PL_exitlist[PL_exitlistlen].fn = fn;
1425 PL_exitlist[PL_exitlistlen].ptr = ptr;
1426 ++PL_exitlistlen;
4b556e6c
JD
1427}
1428
56cf6df8
RGS
1429#ifdef HAS_PROCSELFEXE
1430/* This is a function so that we don't hold on to MAXPATHLEN
1431 bytes of stack longer than necessary
1432 */
1433STATIC void
e1ec3a88 1434S_procself_val(pTHX_ SV *sv, const char *arg0)
56cf6df8
RGS
1435{
1436 char buf[MAXPATHLEN];
1437 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1438
1439 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1440 includes a spurious NUL which will cause $^X to fail in system
1441 or backticks (this will prevent extensions from being built and
1442 many tests from working). readlink is not meant to add a NUL.
1443 Normal readlink works fine.
1444 */
1445 if (len > 0 && buf[len-1] == '\0') {
1446 len--;
1447 }
1448
1449 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1450 returning the text "unknown" from the readlink rather than the path
1451 to the executable (or returning an error from the readlink). Any valid
1452 path has a '/' in it somewhere, so use that to validate the result.
1453 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1454 */
1455 if (len > 0 && memchr(buf, '/', len)) {
1456 sv_setpvn(sv,buf,len);
1457 }
1458 else {
1459 sv_setpv(sv,arg0);
1460 }
1461}
1462#endif /* HAS_PROCSELFEXE */
b7975bdd
NC
1463
1464STATIC void
1465S_set_caret_X(pTHX) {
97aff369 1466 dVAR;
fafc274c 1467 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
b7975bdd
NC
1468 if (tmpgv) {
1469#ifdef HAS_PROCSELFEXE
1470 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1471#else
1472#ifdef OS2
c69033f2 1473 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
b7975bdd 1474#else
c69033f2 1475 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
b7975bdd
NC
1476#endif
1477#endif
1478 }
1479}
1480
954c1994
GS
1481/*
1482=for apidoc perl_parse
1483
1484Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1485
1486=cut
1487*/
1488
79072805 1489int
0cb96387 1490perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 1491{
27da23d5 1492 dVAR;
6224f72b 1493 I32 oldscope;
6224f72b 1494 int ret;
db36c5a1 1495 dJMPENV;
8d063cd8 1496
ed6c66dd 1497 PERL_UNUSED_ARG(my_perl);
9d4ba2ae 1498
a687059c
LW
1499#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1500#ifdef IAMSUID
1501#undef IAMSUID
cea2e8a9 1502 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c 1503setuid perl scripts securely.\n");
ae3f3efd 1504#endif /* IAMSUID */
a687059c
LW
1505#endif
1506
b0891165
JH
1507#if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1508 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
103dd899 1509 * This MUST be done before any hash stores or fetches take place.
008fb0c0
NC
1510 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1511 * yourself, it is your responsibility to provide a good random seed!
830b38bd 1512 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
008fb0c0
NC
1513 if (!PL_rehash_seed_set)
1514 PL_rehash_seed = get_hash_seed();
b0891165 1515 {
9d4ba2ae 1516 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
bed60192 1517
1b6737cc
AL
1518 if (s && (atoi(s) == 1))
1519 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
b0891165
JH
1520 }
1521#endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1522
3280af22 1523 PL_origargc = argc;
e2975953 1524 PL_origargv = argv;
a0d0e21e 1525
a2722ac9
GA
1526 if (PL_origalen != 0) {
1527 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1528 }
1529 else {
3cb9023d
JH
1530 /* Set PL_origalen be the sum of the contiguous argv[]
1531 * elements plus the size of the env in case that it is
e9137a8e 1532 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
3cb9023d
JH
1533 * as the maximum modifiable length of $0. In the worst case
1534 * the area we are able to modify is limited to the size of
43c32782 1535 * the original argv[0]. (See below for 'contiguous', though.)
3cb9023d 1536 * --jhi */
e1ec3a88 1537 const char *s = NULL;
54bfe034 1538 int i;
1b6737cc 1539 const UV mask =
7d8e7db3 1540 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
43c32782 1541 /* Do the mask check only if the args seem like aligned. */
1b6737cc 1542 const UV aligned =
43c32782
JH
1543 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1544
1545 /* See if all the arguments are contiguous in memory. Note
1546 * that 'contiguous' is a loose term because some platforms
1547 * align the argv[] and the envp[]. If the arguments look
1548 * like non-aligned, assume that they are 'strictly' or
1549 * 'traditionally' contiguous. If the arguments look like
1550 * aligned, we just check that they are within aligned
1551 * PTRSIZE bytes. As long as no system has something bizarre
1552 * like the argv[] interleaved with some other data, we are
1553 * fine. (Did I just evoke Murphy's Law?) --jhi */
c8941eeb
JH
1554 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1555 while (*s) s++;
1556 for (i = 1; i < PL_origargc; i++) {
1557 if ((PL_origargv[i] == s + 1
43c32782 1558#ifdef OS2
c8941eeb 1559 || PL_origargv[i] == s + 2
43c32782 1560#endif
c8941eeb
JH
1561 )
1562 ||
1563 (aligned &&
1564 (PL_origargv[i] > s &&
1565 PL_origargv[i] <=
1566 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1567 )
1568 {
1569 s = PL_origargv[i];
1570 while (*s) s++;
1571 }
1572 else
1573 break;
54bfe034 1574 }
54bfe034 1575 }
a4a109c2
JD
1576
1577#ifndef PERL_USE_SAFE_PUTENV
3cb9023d 1578 /* Can we grab env area too to be used as the area for $0? */
a4a109c2 1579 if (s && PL_origenviron && !PL_use_safe_putenv) {
9d419b5f 1580 if ((PL_origenviron[0] == s + 1)
43c32782
JH
1581 ||
1582 (aligned &&
1583 (PL_origenviron[0] > s &&
1584 PL_origenviron[0] <=
1585 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1586 )
1587 {
9d419b5f 1588#ifndef OS2 /* ENVIRON is read by the kernel too. */
43c32782
JH
1589 s = PL_origenviron[0];
1590 while (*s) s++;
1591#endif
bd61b366 1592 my_setenv("NoNe SuCh", NULL);
43c32782
JH
1593 /* Force copy of environment. */
1594 for (i = 1; PL_origenviron[i]; i++) {
1595 if (PL_origenviron[i] == s + 1
1596 ||
1597 (aligned &&
1598 (PL_origenviron[i] > s &&
1599 PL_origenviron[i] <=
1600 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1601 )
1602 {
1603 s = PL_origenviron[i];
1604 while (*s) s++;
1605 }
1606 else
1607 break;
54bfe034 1608 }
43c32782 1609 }
54bfe034 1610 }
a4a109c2
JD
1611#endif /* !defined(PERL_USE_SAFE_PUTENV) */
1612
2d2af554 1613 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
54bfe034
JH
1614 }
1615
3280af22 1616 if (PL_do_undump) {
a0d0e21e
LW
1617
1618 /* Come here if running an undumped a.out. */
1619
3280af22
NIS
1620 PL_origfilename = savepv(argv[0]);
1621 PL_do_undump = FALSE;
a0d0e21e 1622 cxstack_ix = -1; /* start label stack again */
748a9306 1623 init_ids();
b7975bdd
NC
1624 assert (!PL_tainted);
1625 TAINT;
1626 S_set_caret_X(aTHX);
1627 TAINT_NOT;
a0d0e21e
LW
1628 init_postdump_symbols(argc,argv,env);
1629 return 0;
1630 }
1631
3280af22 1632 if (PL_main_root) {
3280af22 1633 op_free(PL_main_root);
5f66b61c 1634 PL_main_root = NULL;
ff0cee69 1635 }
5f66b61c 1636 PL_main_start = NULL;
3280af22 1637 SvREFCNT_dec(PL_main_cv);
601f1833 1638 PL_main_cv = NULL;
79072805 1639
3280af22
NIS
1640 time(&PL_basetime);
1641 oldscope = PL_scopestack_ix;
599cee73 1642 PL_dowarn = G_WARN_OFF;
f86702cc 1643
14dd3ad8 1644 JMPENV_PUSH(ret);
6224f72b 1645 switch (ret) {
312caa8e 1646 case 0:
14dd3ad8 1647 parse_body(env,xsinit);
3c10abe3
AG
1648 if (PL_unitcheckav)
1649 call_list(oldscope, PL_unitcheckav);
7d30b5c4
GS
1650 if (PL_checkav)
1651 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1652 ret = 0;
1653 break;
6224f72b
GS
1654 case 1:
1655 STATUS_ALL_FAILURE;
1656 /* FALL THROUGH */
1657 case 2:
1658 /* my_exit() was called */
3280af22 1659 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1660 LEAVE;
1661 FREETMPS;
3280af22 1662 PL_curstash = PL_defstash;
3c10abe3
AG
1663 if (PL_unitcheckav)
1664 call_list(oldscope, PL_unitcheckav);
7d30b5c4
GS
1665 if (PL_checkav)
1666 call_list(oldscope, PL_checkav);
37038d91 1667 ret = STATUS_EXIT;
14dd3ad8 1668 break;
6224f72b 1669 case 3:
bf49b057 1670 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1671 ret = 1;
1672 break;
6224f72b 1673 }
14dd3ad8
GS
1674 JMPENV_POP;
1675 return ret;
1676}
1677
312caa8e 1678STATIC void *
14dd3ad8 1679S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1680{
27da23d5 1681 dVAR;
2f9285f8 1682 PerlIO *rsfp;
312caa8e 1683 int argc = PL_origargc;
8f42b153 1684 char **argv = PL_origargv;
e1ec3a88 1685 const char *scriptname = NULL;
312caa8e 1686 VOL bool dosearch = FALSE;
e1ec3a88 1687 const char *validarg = "";
312caa8e 1688 register SV *sv;
c7030b81 1689 register char c;
bd61b366 1690 const char *cddir = NULL;
ab019eaa 1691#ifdef USE_SITECUSTOMIZE
20ef40cf 1692 bool minus_f = FALSE;
ab019eaa 1693#endif
009d90df 1694 SV *linestr_sv = newSV_type(SVt_PVIV);
5486870f 1695 bool add_read_e_script = FALSE;
009d90df
DM
1696
1697 SvGROW(linestr_sv, 80);
1698 sv_setpvn(linestr_sv,"",0);
312caa8e 1699
396482e1 1700 sv = newSVpvs(""); /* first used for -I flags */
6224f72b
GS
1701 SAVEFREESV(sv);
1702 init_main_stash();
54310121 1703
c7030b81
NC
1704 {
1705 const char *s;
6224f72b
GS
1706 for (argc--,argv++; argc > 0; argc--,argv++) {
1707 if (argv[0][0] != '-' || !argv[0][1])
1708 break;
1709#ifdef DOSUID
1710 if (*validarg)
1711 validarg = " PHOOEY ";
1712 else
1713 validarg = argv[0];
ae3f3efd
PS
1714 /*
1715 * Can we rely on the kernel to start scripts with argv[1] set to
1716 * contain all #! line switches (the whole line)? (argv[0] is set to
1717 * the interpreter name, argv[2] to the script name; argv[3] and
1718 * above may contain other arguments.)
1719 */
13281fa4 1720#endif
6224f72b
GS
1721 s = argv[0]+1;
1722 reswitch:
47f56822 1723 switch ((c = *s)) {
729a02f2 1724 case 'C':
1d5472a9
GS
1725#ifndef PERL_STRICT_CR
1726 case '\r':
1727#endif
6224f72b
GS
1728 case ' ':
1729 case '0':
1730 case 'F':
1731 case 'a':
1732 case 'c':
1733 case 'd':
1734 case 'D':
1735 case 'h':
1736 case 'i':
1737 case 'l':
1738 case 'M':
1739 case 'm':
1740 case 'n':
1741 case 'p':
1742 case 's':
1743 case 'u':
1744 case 'U':
1745 case 'v':
599cee73
PM
1746 case 'W':
1747 case 'X':
6224f72b 1748 case 'w':
97bd5664 1749 if ((s = moreswitches(s)))
6224f72b
GS
1750 goto reswitch;
1751 break;
33b78306 1752
1dbad523 1753 case 't':
22f7c9c9 1754 CHECK_MALLOC_TOO_LATE_FOR('t');
317ea90d
MS
1755 if( !PL_tainting ) {
1756 PL_taint_warn = TRUE;
1757 PL_tainting = TRUE;
1758 }
1759 s++;
1760 goto reswitch;
6224f72b 1761 case 'T':
22f7c9c9 1762 CHECK_MALLOC_TOO_LATE_FOR('T');
3280af22 1763 PL_tainting = TRUE;
317ea90d 1764 PL_taint_warn = FALSE;
6224f72b
GS
1765 s++;
1766 goto reswitch;
f86702cc 1767
bc9b29db
RH
1768 case 'E':
1769 PL_minus_E = TRUE;
1770 /* FALL THROUGH */
6224f72b 1771 case 'e':
bf4acbe4
GS
1772#ifdef MACOS_TRADITIONAL
1773 /* ignore -e for Dev:Pseudo argument */
1774 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
e55ac0fa 1775 break;
bf4acbe4 1776#endif
a52eba0e 1777 forbid_setid('e', -1);
3280af22 1778 if (!PL_e_script) {
396482e1 1779 PL_e_script = newSVpvs("");
5486870f 1780 add_read_e_script = TRUE;
6224f72b
GS
1781 }
1782 if (*++s)
3280af22 1783 sv_catpv(PL_e_script, s);
6224f72b 1784 else if (argv[1]) {
3280af22 1785 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1786 argc--,argv++;
1787 }
1788 else
47f56822 1789 Perl_croak(aTHX_ "No code specified for -%c", c);
396482e1 1790 sv_catpvs(PL_e_script, "\n");
6224f72b 1791 break;
afe37c7d 1792
20ef40cf 1793 case 'f':
f5542d3a 1794#ifdef USE_SITECUSTOMIZE
20ef40cf 1795 minus_f = TRUE;
f5542d3a 1796#endif
20ef40cf
GA
1797 s++;
1798 goto reswitch;
1799
6224f72b 1800 case 'I': /* -I handled both here and in moreswitches() */
a52eba0e 1801 forbid_setid('I', -1);
bd61b366 1802 if (!*++s && (s=argv[1]) != NULL) {
6224f72b
GS
1803 argc--,argv++;
1804 }
6224f72b 1805 if (s && *s) {
0df16ed7 1806 STRLEN len = strlen(s);
aec46f14 1807 const char * const p = savepvn(s, len);
88fe16b2 1808 incpush(p, TRUE, TRUE, FALSE, FALSE);
396482e1 1809 sv_catpvs(sv, "-I");
0df16ed7 1810 sv_catpvn(sv, p, len);
396482e1 1811 sv_catpvs(sv, " ");
6224f72b 1812 Safefree(p);
0df16ed7
GS
1813 }
1814 else
a67e862a 1815 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1816 break;
1817 case 'P':
a52eba0e 1818 forbid_setid('P', -1);
3280af22 1819 PL_preprocess = TRUE;
6224f72b 1820 s++;
6cccac84 1821 deprecate("-P");
6224f72b
GS
1822 goto reswitch;
1823 case 'S':
a52eba0e 1824 forbid_setid('S', -1);
6224f72b
GS
1825 dosearch = TRUE;
1826 s++;
1827 goto reswitch;
1828 case 'V':
7edfd0ef
NC
1829 {
1830 SV *opts_prog;
1831
29a861e7 1832 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
7edfd0ef 1833 if (*++s != ':') {
389d73ad
NC
1834 /* Can't do newSVpvs() as that would involve pre-processor
1835 condititionals inside a macro expansion. */
1836 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
6224f72b 1837# ifdef DEBUGGING
e2e4dbf1 1838 " DEBUGGING"
6224f72b 1839# endif
3bcf5ed8
SP
1840# ifdef NO_MATHOMS
1841 " NO_MATHOMS"
1842# endif
85e1fcb9 1843# ifdef PERL_DONT_CREATE_GVSV
e2e4dbf1 1844 " PERL_DONT_CREATE_GVSV"
85e1fcb9 1845# endif
85e1fcb9 1846# ifdef PERL_MALLOC_WRAP
e2e4dbf1 1847 " PERL_MALLOC_WRAP"
85e1fcb9 1848# endif
4724db38
NC
1849# ifdef PERL_MEM_LOG
1850 " PERL_MEM_LOG"
1851# endif
1852# ifdef PERL_MEM_LOG_ENV
1853 " PERL_MEM_LOG_ENV"
1854# endif
1855# ifdef PERL_MEM_LOG_ENV_FD
1856 " PERL_MEM_LOG_ENV_FD"
1857# endif
1858# ifdef PERL_MEM_LOG_STDERR
1859 " PERL_MEM_LOG_STDERR"
1860# endif
1861# ifdef PERL_MEM_LOG_TIMESTAMP
1862 " PERL_MEM_LOG_TIMESTAMP"
1863# endif
417cd4a8
SP
1864# ifdef PERL_USE_SAFE_PUTENV
1865 " PERL_USE_SAFE_PUTENV"
1866# endif
20ef40cf 1867# ifdef USE_SITECUSTOMIZE
e2e4dbf1 1868 " USE_SITECUSTOMIZE"
20ef40cf 1869# endif
389d73ad 1870 , 0);
efcaa95b 1871
b75885fd 1872 sv_catpv(opts_prog, PL_bincompat_options);
389d73ad
NC
1873 /* Terminate the qw(, and then wrap at 76 columns. */
1874 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1875#ifdef VMS
1876 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1877#else
1878 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1879#endif
efcaa95b 1880
389d73ad 1881 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
b363f7ed 1882
6224f72b 1883#if defined(LOCAL_PATCH_COUNT)
7edfd0ef
NC
1884 if (LOCAL_PATCH_COUNT > 0) {
1885 int i;
396482e1 1886 sv_catpvs(opts_prog,
7edfd0ef
NC
1887 "\" Locally applied patches:\\n\",");
1888 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1889 if (PL_localpatches[i])
1890 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1891 0, PL_localpatches[i], 0);
1892 }
6224f72b 1893 }
6224f72b 1894#endif
7edfd0ef 1895 Perl_sv_catpvf(aTHX_ opts_prog,
758ce194 1896 "\" Built under %s\\n",OSNAME);
6224f72b
GS
1897#ifdef __DATE__
1898# ifdef __TIME__
7edfd0ef 1899 Perl_sv_catpvf(aTHX_ opts_prog,
758ce194 1900 " Compiled at %s %s\\n\"",__DATE__,
7edfd0ef 1901 __TIME__);
6224f72b 1902# else
758ce194 1903 Perl_sv_catpvf(aTHX_ opts_prog," Compiled on %s\\n\"",
7edfd0ef 1904 __DATE__);
6224f72b
GS
1905# endif
1906#endif
396482e1 1907 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
7edfd0ef
NC
1908 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1909 "sort grep {/^PERL/} keys %ENV; ");
69fcd688 1910#ifdef __CYGWIN__
396482e1 1911 sv_catpvs(opts_prog,
7edfd0ef 1912 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
69fcd688 1913#endif
396482e1 1914 sv_catpvs(opts_prog,
7edfd0ef
NC
1915 "print \" \\%ENV:\\n @env\\n\" if @env;"
1916 "print \" \\@INC:\\n @INC\\n\";");
1917 }
1918 else {
1919 ++s;
1920 opts_prog = Perl_newSVpvf(aTHX_
1921 "Config::config_vars(qw%c%s%c)",
1922 0, s, 0);
1923 s += strlen(s);
1924 }
1925 av_push(PL_preambleav, opts_prog);
1926 /* don't look for script or read stdin */
1927 scriptname = BIT_BUCKET;
1928 goto reswitch;
6224f72b 1929 }
6224f72b 1930 case 'x':
3280af22 1931 PL_doextract = TRUE;
6224f72b 1932 s++;
304334da 1933 if (*s)
f4c556ac 1934 cddir = s;
6224f72b
GS
1935 break;
1936 case 0:
1937 break;
1938 case '-':
1939 if (!*++s || isSPACE(*s)) {
1940 argc--,argv++;
1941 goto switch_end;
1942 }
1943 /* catch use of gnu style long options */
1944 if (strEQ(s, "version")) {
dd374669 1945 s = (char *)"v";
6224f72b
GS
1946 goto reswitch;
1947 }
1948 if (strEQ(s, "help")) {
dd374669 1949 s = (char *)"h";
6224f72b
GS
1950 goto reswitch;
1951 }
1952 s--;
1953 /* FALL THROUGH */
1954 default:
cea2e8a9 1955 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1956 }
1957 }
c7030b81
NC
1958 }
1959
6224f72b 1960 switch_end:
54310121 1961
c7030b81
NC
1962 {
1963 char *s;
1964
f675dbe5
CB
1965 if (
1966#ifndef SECURE_INTERNAL_GETENV
1967 !PL_tainting &&
1968#endif
cf756827 1969 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1970 {
e1ec3a88 1971 const char *popt = s;
74288ac8
GS
1972 while (isSPACE(*s))
1973 s++;
317ea90d 1974 if (*s == '-' && *(s+1) == 'T') {
22f7c9c9 1975 CHECK_MALLOC_TOO_LATE_FOR('T');
74288ac8 1976 PL_tainting = TRUE;
317ea90d
MS
1977 PL_taint_warn = FALSE;
1978 }
74288ac8 1979 else {
bd61b366 1980 char *popt_copy = NULL;
74288ac8 1981 while (s && *s) {
4ea8f8fb 1982 char *d;
74288ac8
GS
1983 while (isSPACE(*s))
1984 s++;
1985 if (*s == '-') {
1986 s++;
1987 if (isSPACE(*s))
1988 continue;
1989 }
4ea8f8fb 1990 d = s;
74288ac8
GS
1991 if (!*s)
1992 break;
f0d36289 1993 if (!strchr("CDIMUdmtw", *s))
cea2e8a9 1994 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1995 while (++s && *s) {
1996 if (isSPACE(*s)) {
cf756827
GS
1997 if (!popt_copy) {
1998 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1999 s = popt_copy + (s - popt);
2000 d = popt_copy + (d - popt);
2001 }
4ea8f8fb
MS
2002 *s++ = '\0';
2003 break;
2004 }
2005 }
1c4db469 2006 if (*d == 't') {
317ea90d
MS
2007 if( !PL_tainting ) {
2008 PL_taint_warn = TRUE;
2009 PL_tainting = TRUE;
2010 }
1c4db469 2011 } else {
97bd5664 2012 moreswitches(d);
1c4db469 2013 }
6224f72b 2014 }
6224f72b
GS
2015 }
2016 }
c7030b81 2017 }
a0d0e21e 2018
20ef40cf
GA
2019#ifdef USE_SITECUSTOMIZE
2020 if (!minus_f) {
29a861e7
NC
2021 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2022 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
20ef40cf
GA
2023 }
2024#endif
2025
6224f72b
GS
2026 if (!scriptname)
2027 scriptname = argv[0];
3280af22 2028 if (PL_e_script) {
6224f72b
GS
2029 argc++,argv--;
2030 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2031 }
bd61b366 2032 else if (scriptname == NULL) {
6224f72b
GS
2033#ifdef MSDOS
2034 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
97bd5664 2035 moreswitches("h");
6224f72b
GS
2036#endif
2037 scriptname = "-";
2038 }
2039
b7975bdd
NC
2040 /* Set $^X early so that it can be used for relocatable paths in @INC */
2041 assert (!PL_tainted);
2042 TAINT;
2043 S_set_caret_X(aTHX);
2044 TAINT_NOT;
6224f72b
GS
2045 init_perllib();
2046
a52eba0e
NC
2047 {
2048 int suidscript;
2049 const int fdscript
2f9285f8 2050 = open_script(scriptname, dosearch, sv, &suidscript, &rsfp);
6224f72b 2051
2f9285f8
DM
2052 validate_suid(validarg, scriptname, fdscript, suidscript,
2053 linestr_sv, rsfp);
6224f72b 2054
64ca3a65 2055#ifndef PERL_MICRO
a52eba0e
NC
2056# if defined(SIGCHLD) || defined(SIGCLD)
2057 {
2058# ifndef SIGCHLD
2059# define SIGCHLD SIGCLD
2060# endif
2061 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2062 if (sigstate == (Sighandler_t) SIG_IGN) {
2063 if (ckWARN(WARN_SIGNAL))
2064 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2065 "Can't ignore signal CHLD, forcing to default");
2066 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2067 }
0b5b802d 2068 }
a52eba0e 2069# endif
64ca3a65 2070#endif
0b5b802d 2071
a52eba0e 2072 if (PL_doextract
bf4acbe4 2073#ifdef MACOS_TRADITIONAL
a52eba0e 2074 || gMacPerl_AlwaysExtract
bf4acbe4 2075#endif
a52eba0e 2076 ) {
faef540c
NC
2077
2078 /* This will croak if suidscript is >= 0, as -x cannot be used with
2079 setuid scripts. */
2080 forbid_setid('x', suidscript);
2081 /* Hence you can't get here if suidscript >= 0 */
2082
2f9285f8 2083 find_beginning(linestr_sv, rsfp);
a52eba0e
NC
2084 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2085 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2086 }
f4c556ac 2087 }
6224f72b 2088
b9f83d2f 2089 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
3280af22
NIS
2090 CvUNIQUE_on(PL_compcv);
2091
dd2155a4 2092 CvPADLIST(PL_compcv) = pad_new(0);
6224f72b 2093
dd69841b
BB
2094 PL_isarev = newHV();
2095
0c4f7ff0 2096 boot_core_PerlIO();
6224f72b 2097 boot_core_UNIVERSAL();
09bef843 2098 boot_core_xsutils();
e1a479c5 2099 boot_core_mro();
6224f72b
GS
2100
2101 if (xsinit)
acfe0abc 2102 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 2103#ifndef PERL_MICRO
d0d72822 2104#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
c5be433b 2105 init_os_extras();
6224f72b 2106#endif
64ca3a65 2107#endif
6224f72b 2108
29209bc5 2109#ifdef USE_SOCKS
1b9c9cf5
DH
2110# ifdef HAS_SOCKS5_INIT
2111 socks5_init(argv[0]);
2112# else
29209bc5 2113 SOCKSinit(argv[0]);
1b9c9cf5 2114# endif
ac27b0f5 2115#endif
29209bc5 2116
6224f72b
GS
2117 init_predump_symbols();
2118 /* init_postdump_symbols not currently designed to be called */
2119 /* more than once (ENV isn't cleared first, for example) */
2120 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 2121 if (!PL_do_undump)
6224f72b
GS
2122 init_postdump_symbols(argc,argv,env);
2123
27da23d5
JH
2124 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2125 * or explicitly in some platforms.
085a54d9 2126 * locale.c:Perl_init_i18nl10n() if the environment
a05d7ebb 2127 * look like the user wants to use UTF-8. */
a0fd4948 2128#if defined(__SYMBIAN32__)
27da23d5
JH
2129 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2130#endif
06e66572
JH
2131 if (PL_unicode) {
2132 /* Requires init_predump_symbols(). */
a05d7ebb 2133 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
06e66572
JH
2134 IO* io;
2135 PerlIO* fp;
2136 SV* sv;
2137
a05d7ebb 2138 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
06e66572 2139 * and the default open disciplines. */
a05d7ebb
JH
2140 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2141 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2142 (fp = IoIFP(io)))
2143 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2144 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2145 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2146 (fp = IoOFP(io)))
2147 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2148 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2149 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2150 (fp = IoOFP(io)))
2151 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2152 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
fafc274c
NC
2153 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2154 SVt_PV)))) {
a05d7ebb
JH
2155 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2156 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2157 if (in) {
2158 if (out)
2159 sv_setpvn(sv, ":utf8\0:utf8", 11);
2160 else
2161 sv_setpvn(sv, ":utf8\0", 6);
2162 }
2163 else if (out)
2164 sv_setpvn(sv, "\0:utf8", 6);
2165 SvSETMAGIC(sv);
2166 }
b310b053
JH
2167 }
2168 }
2169
c7030b81
NC
2170 {
2171 const char *s;
4ffa73a3
JH
2172 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2173 if (strEQ(s, "unsafe"))
2174 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2175 else if (strEQ(s, "safe"))
2176 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2177 else
2178 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2179 }
c7030b81 2180 }
4ffa73a3 2181
81d86705 2182#ifdef PERL_MAD
c7030b81
NC
2183 {
2184 const char *s;
81d86705
NC
2185 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2186 PL_madskills = 1;
2187 PL_minus_c = 1;
2188 if (!s || !s[0])
2189 PL_xmlfp = PerlIO_stdout();
2190 else {
2191 PL_xmlfp = PerlIO_open(s, "w");
2192 if (!PL_xmlfp)
2193 Perl_croak(aTHX_ "Can't open %s", s);
2194 }
1a9a51d4 2195 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
81d86705 2196 }
c7030b81
NC
2197 }
2198
2199 {
2200 const char *s;
81d86705
NC
2201 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2202 PL_madskills = atoi(s);
1a9a51d4 2203 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
81d86705 2204 }
c7030b81 2205 }
81d86705
NC
2206#endif
2207
5486870f 2208 lex_start(linestr_sv, rsfp, TRUE);
219f7226 2209 PL_subname = newSVpvs("main");
6224f72b 2210
5486870f
DM
2211 if (add_read_e_script)
2212 filter_add(read_e_script, NULL);
2213
6224f72b
GS
2214 /* now parse the script */
2215
93189314 2216 SETERRNO(0,SS_NORMAL);
bf4acbe4 2217#ifdef MACOS_TRADITIONAL
13765c85 2218 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
bf4acbe4
GS
2219 if (PL_minus_c)
2220 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2221 else {
2222 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2223 MacPerl_MPWFileName(PL_origfilename));
2224 }
2225 }
2226#else
13765c85 2227 if (yyparse() || PL_parser->error_count) {
3280af22 2228 if (PL_minus_c)
cea2e8a9 2229 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 2230 else {
cea2e8a9 2231 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 2232 PL_origfilename);
6224f72b
GS
2233 }
2234 }
bf4acbe4 2235#endif
57843af0 2236 CopLINE_set(PL_curcop, 0);
3280af22
NIS
2237 PL_curstash = PL_defstash;
2238 PL_preprocess = FALSE;
2239 if (PL_e_script) {
2240 SvREFCNT_dec(PL_e_script);
a0714e2c 2241 PL_e_script = NULL;
6224f72b
GS
2242 }
2243
3280af22 2244 if (PL_do_undump)
6224f72b
GS
2245 my_unexec();
2246
57843af0
GS
2247 if (isWARN_ONCE) {
2248 SAVECOPFILE(PL_curcop);
2249 SAVECOPLINE(PL_curcop);
3280af22 2250 gv_check(PL_defstash);
57843af0 2251 }
6224f72b
GS
2252
2253 LEAVE;
2254 FREETMPS;
2255
2256#ifdef MYMALLOC
f6a607bc
RGS
2257 {
2258 const char *s;
6224f72b
GS
2259 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2260 dump_mstats("after compilation:");
f6a607bc 2261 }
6224f72b
GS
2262#endif
2263
2264 ENTER;
3280af22 2265 PL_restartop = 0;
312caa8e 2266 return NULL;
6224f72b
GS
2267}
2268
954c1994
GS
2269/*
2270=for apidoc perl_run
2271
2272Tells a Perl interpreter to run. See L<perlembed>.
2273
2274=cut
2275*/
2276
6224f72b 2277int
0cb96387 2278perl_run(pTHXx)
6224f72b 2279{
97aff369 2280 dVAR;
6224f72b 2281 I32 oldscope;
14dd3ad8 2282 int ret = 0;
db36c5a1 2283 dJMPENV;
6224f72b 2284
ed6c66dd 2285 PERL_UNUSED_ARG(my_perl);
9d4ba2ae 2286
3280af22 2287 oldscope = PL_scopestack_ix;
96e176bf
CL
2288#ifdef VMS
2289 VMSISH_HUSHED = 0;
2290#endif
6224f72b 2291
14dd3ad8 2292 JMPENV_PUSH(ret);
6224f72b
GS
2293 switch (ret) {
2294 case 1:
2295 cxstack_ix = -1; /* start context stack again */
312caa8e 2296 goto redo_body;
14dd3ad8 2297 case 0: /* normal completion */
14dd3ad8
GS
2298 redo_body:
2299 run_body(oldscope);
14dd3ad8
GS
2300 /* FALL THROUGH */
2301 case 2: /* my_exit() */
3280af22 2302 while (PL_scopestack_ix > oldscope)
6224f72b
GS
2303 LEAVE;
2304 FREETMPS;
3280af22 2305 PL_curstash = PL_defstash;
3a1ee7e8 2306 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
2307 PL_endav && !PL_minus_c)
2308 call_list(oldscope, PL_endav);
6224f72b
GS
2309#ifdef MYMALLOC
2310 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2311 dump_mstats("after execution: ");
2312#endif
37038d91 2313 ret = STATUS_EXIT;
14dd3ad8 2314 break;
6224f72b 2315 case 3:
312caa8e
CS
2316 if (PL_restartop) {
2317 POPSTACK_TO(PL_mainstack);
2318 goto redo_body;
6224f72b 2319 }
bf49b057 2320 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 2321 FREETMPS;
14dd3ad8
GS
2322 ret = 1;
2323 break;
6224f72b
GS
2324 }
2325
14dd3ad8
GS
2326 JMPENV_POP;
2327 return ret;
312caa8e
CS
2328}
2329
dd374669 2330STATIC void
14dd3ad8
GS
2331S_run_body(pTHX_ I32 oldscope)
2332{
97aff369 2333 dVAR;
6224f72b 2334 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 2335 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 2336
3280af22 2337 if (!PL_restartop) {
81d86705
NC
2338#ifdef PERL_MAD
2339 if (PL_xmlfp) {
2340 xmldump_all();
2341 exit(0); /* less likely to core dump than my_exit(0) */
2342 }
2343#endif
6224f72b 2344 DEBUG_x(dump_all());
cf2782cd 2345#ifdef DEBUGGING
ecae49c0
NC
2346 if (!DEBUG_q_TEST)
2347 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
cf2782cd 2348#endif
b900a521
JH
2349 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2350 PTR2UV(thr)));
6224f72b 2351
3280af22 2352 if (PL_minus_c) {
bf4acbe4 2353#ifdef MACOS_TRADITIONAL
e69a2255
JH
2354 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2355 (gMacPerl_ErrorFormat ? "# " : ""),
2356 MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 2357#else
bf49b057 2358 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 2359#endif
6224f72b
GS
2360 my_exit(0);
2361 }
3280af22 2362 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 2363 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
2364 if (PL_initav)
2365 call_list(oldscope, PL_initav);
f1fac472
NC
2366#ifdef PERL_DEBUG_READONLY_OPS
2367 Perl_pending_Slabs_to_ro(aTHX);
2368#endif
6224f72b
GS
2369 }
2370
2371 /* do it */
2372
3280af22 2373 if (PL_restartop) {
533c011a 2374 PL_op = PL_restartop;
3280af22 2375 PL_restartop = 0;
cea2e8a9 2376 CALLRUNOPS(aTHX);
6224f72b 2377 }
3280af22
NIS
2378 else if (PL_main_start) {
2379 CvDEPTH(PL_main_cv) = 1;
533c011a 2380 PL_op = PL_main_start;
cea2e8a9 2381 CALLRUNOPS(aTHX);
6224f72b 2382 }
f6b3007c
JH
2383 my_exit(0);
2384 /* NOTREACHED */
6224f72b
GS
2385}
2386
954c1994 2387/*
ccfc67b7
JH
2388=head1 SV Manipulation Functions
2389
954c1994
GS
2390=for apidoc p||get_sv
2391
2392Returns the SV of the specified Perl scalar. If C<create> is set and the
2393Perl variable does not exist then it will be created. If C<create> is not
2394set and the variable does not exist then NULL is returned.
2395
2396=cut
2397*/
2398
6224f72b 2399SV*
864dbfa3 2400Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
2401{
2402 GV *gv;
6224f72b
GS
2403 gv = gv_fetchpv(name, create, SVt_PV);
2404 if (gv)
2405 return GvSV(gv);
a0714e2c 2406 return NULL;
6224f72b
GS
2407}
2408
954c1994 2409/*
ccfc67b7
JH
2410=head1 Array Manipulation Functions
2411
954c1994
GS
2412=for apidoc p||get_av
2413
2414Returns the AV of the specified Perl array. If C<create> is set and the
2415Perl variable does not exist then it will be created. If C<create> is not
2416set and the variable does not exist then NULL is returned.
2417
2418=cut
2419*/
2420
6224f72b 2421AV*
864dbfa3 2422Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b 2423{
c4420975 2424 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
6224f72b
GS
2425 if (create)
2426 return GvAVn(gv);
2427 if (gv)
2428 return GvAV(gv);
7d49f689 2429 return NULL;
6224f72b
GS
2430}
2431
954c1994 2432/*
ccfc67b7
JH
2433=head1 Hash Manipulation Functions
2434
954c1994
GS
2435=for apidoc p||get_hv
2436
2437Returns the HV of the specified Perl hash. If C<create> is set and the
2438Perl variable does not exist then it will be created. If C<create> is not
2439set and the variable does not exist then NULL is returned.
2440
2441=cut
2442*/
2443
6224f72b 2444HV*
864dbfa3 2445Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 2446{
890ce7af 2447 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
a0d0e21e
LW
2448 if (create)
2449 return GvHVn(gv);
2450 if (gv)
2451 return GvHV(gv);
5c284bb0 2452 return NULL;
a0d0e21e
LW
2453}
2454
954c1994 2455/*
ccfc67b7
JH
2456=head1 CV Manipulation Functions
2457
780a5241
NC
2458=for apidoc p||get_cvn_flags
2459
2460Returns the CV of the specified Perl subroutine. C<flags> are passed to
2461C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2462exist then it will be declared (which has the same effect as saying
2463C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2464then NULL is returned.
2465
954c1994
GS
2466=for apidoc p||get_cv
2467
780a5241 2468Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
954c1994
GS
2469
2470=cut
2471*/
2472
a0d0e21e 2473CV*
780a5241 2474Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
a0d0e21e 2475{
780a5241 2476 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
f6ec51f7
GS
2477 /* XXX this is probably not what they think they're getting.
2478 * It has the same effect as "sub name;", i.e. just a forward
2479 * declaration! */
780a5241
NC
2480 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2481 SV *const sv = newSVpvn(name,len);
2482 SvFLAGS(sv) |= flags & SVf_UTF8;
774d564b 2483 return newSUB(start_subparse(FALSE, 0),
780a5241 2484 newSVOP(OP_CONST, 0, sv),
5f66b61c 2485 NULL, NULL);
780a5241 2486 }
a0d0e21e 2487 if (gv)
8ebc5c01 2488 return GvCVu(gv);
601f1833 2489 return NULL;
a0d0e21e
LW
2490}
2491
780a5241
NC
2492CV*
2493Perl_get_cv(pTHX_ const char *name, I32 flags)
2494{
2495 return get_cvn_flags(name, strlen(name), flags);
2496}
2497
79072805
LW
2498/* Be sure to refetch the stack pointer after calling these routines. */
2499
954c1994 2500/*
ccfc67b7
JH
2501
2502=head1 Callback Functions
2503
954c1994
GS
2504=for apidoc p||call_argv
2505
2506Performs a callback to the specified Perl sub. See L<perlcall>.
2507
2508=cut
2509*/
2510
a0d0e21e 2511I32
8f42b153 2512Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 2513
8ac85365
NIS
2514 /* See G_* flags in cop.h */
2515 /* null terminated arg list */
8990e307 2516{
97aff369 2517 dVAR;
a0d0e21e 2518 dSP;
8990e307 2519
924508f0 2520 PUSHMARK(SP);
a0d0e21e 2521 if (argv) {
8990e307 2522 while (*argv) {
a0d0e21e 2523 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
2524 argv++;
2525 }
a0d0e21e 2526 PUTBACK;
8990e307 2527 }
864dbfa3 2528 return call_pv(sub_name, flags);
8990e307
LW
2529}
2530
954c1994
GS
2531/*
2532=for apidoc p||call_pv
2533
2534Performs a callback to the specified Perl sub. See L<perlcall>.
2535
2536=cut
2537*/
2538
a0d0e21e 2539I32
864dbfa3 2540Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
2541 /* name of the subroutine */
2542 /* See G_* flags in cop.h */
a0d0e21e 2543{
864dbfa3 2544 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
2545}
2546
954c1994
GS
2547/*
2548=for apidoc p||call_method
2549
2550Performs a callback to the specified Perl method. The blessed object must
2551be on the stack. See L<perlcall>.
2552
2553=cut
2554*/
2555
a0d0e21e 2556I32
864dbfa3 2557Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
2558 /* name of the subroutine */
2559 /* See G_* flags in cop.h */
a0d0e21e 2560{
968b3946 2561 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
2562}
2563
2564/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
2565/*
2566=for apidoc p||call_sv
2567
2568Performs a callback to the Perl sub whose name is in the SV. See
2569L<perlcall>.
2570
2571=cut
2572*/
2573
a0d0e21e 2574I32
864dbfa3 2575Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 2576 /* See G_* flags in cop.h */
a0d0e21e 2577{
27da23d5 2578 dVAR; dSP;
a0d0e21e 2579 LOGOP myop; /* fake syntax tree node */
968b3946 2580 UNOP method_op;
aa689395 2581 I32 oldmark;
8ea43dc8 2582 VOL I32 retval = 0;
a0d0e21e 2583 I32 oldscope;
54310121 2584 bool oldcatch = CATCH_GET;
6224f72b 2585 int ret;
c4420975 2586 OP* const oldop = PL_op;
db36c5a1 2587 dJMPENV;
1e422769 2588
a0d0e21e
LW
2589 if (flags & G_DISCARD) {
2590 ENTER;
2591 SAVETMPS;
2592 }
2593
aa689395 2594 Zero(&myop, 1, LOGOP);
5f66b61c 2595 myop.op_next = NULL;
f51d4af5 2596 if (!(flags & G_NOARGS))
aa689395 2597 myop.op_flags |= OPf_STACKED;
54310121
PP
2598 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2599 (flags & G_ARRAY) ? OPf_WANT_LIST :
2600 OPf_WANT_SCALAR);
462e5cf6 2601 SAVEOP();
533c011a 2602 PL_op = (OP*)&myop;
aa689395 2603
3280af22
NIS
2604 EXTEND(PL_stack_sp, 1);
2605 *++PL_stack_sp = sv;
aa689395 2606 oldmark = TOPMARK;
3280af22 2607 oldscope = PL_scopestack_ix;
a0d0e21e 2608
3280af22 2609 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 2610 /* Handle first BEGIN of -d. */
3280af22 2611 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24
PP
2612 /* Try harder, since this may have been a sighandler, thus
2613 * curstash may be meaningless. */
3280af22 2614 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 2615 && !(flags & G_NODEBUG))
533c011a 2616 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 2617
968b3946
GS
2618 if (flags & G_METHOD) {
2619 Zero(&method_op, 1, UNOP);
2620 method_op.op_next = PL_op;
2621 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2622 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 2623 PL_op = (OP*)&method_op;
968b3946
GS
2624 }
2625
312caa8e 2626 if (!(flags & G_EVAL)) {
0cdb2077 2627 CATCH_SET(TRUE);
d6f07c05 2628 CALL_BODY_SUB((OP*)&myop);
312caa8e 2629 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 2630 CATCH_SET(oldcatch);
312caa8e
CS
2631 }
2632 else {
d78bda3d 2633 myop.op_other = (OP*)&myop;
3280af22 2634 PL_markstack_ptr--;
edb2152a 2635 create_eval_scope(flags|G_FAKINGEVAL);
3280af22 2636 PL_markstack_ptr++;
a0d0e21e 2637
14dd3ad8 2638 JMPENV_PUSH(ret);
edb2152a 2639
6224f72b
GS
2640 switch (ret) {
2641 case 0:
14dd3ad8 2642 redo_body:
d6f07c05 2643 CALL_BODY_SUB((OP*)&myop);
312caa8e
CS
2644 retval = PL_stack_sp - (PL_stack_base + oldmark);
2645 if (!(flags & G_KEEPERR))
c69006e4 2646 sv_setpvn(ERRSV,"",0);
a0d0e21e 2647 break;
6224f72b 2648 case 1:
f86702cc 2649 STATUS_ALL_FAILURE;
a0d0e21e 2650 /* FALL THROUGH */
6224f72b 2651 case 2:
a0d0e21e 2652 /* my_exit() was called */
3280af22 2653 PL_curstash = PL_defstash;
a0d0e21e 2654 FREETMPS;
14dd3ad8 2655 JMPENV_POP;
cc3604b1 2656 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2657 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2658 my_exit_jump();
a0d0e21e 2659 /* NOTREACHED */
6224f72b 2660 case 3:
3280af22 2661 if (PL_restartop) {
533c011a 2662 PL_op = PL_restartop;
3280af22 2663 PL_restartop = 0;
312caa8e 2664 goto redo_body;
a0d0e21e 2665 }
3280af22 2666 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2667 if (flags & G_ARRAY)
2668 retval = 0;
2669 else {
2670 retval = 1;
3280af22 2671 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 2672 }
312caa8e 2673 break;
a0d0e21e 2674 }
a0d0e21e 2675
edb2152a
NC
2676 if (PL_scopestack_ix > oldscope)
2677 delete_eval_scope();
14dd3ad8 2678 JMPENV_POP;
a0d0e21e 2679 }
1e422769 2680
a0d0e21e 2681 if (flags & G_DISCARD) {
3280af22 2682 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2683 retval = 0;
2684 FREETMPS;
2685 LEAVE;
2686 }
533c011a 2687 PL_op = oldop;
a0d0e21e
LW
2688 return retval;
2689}
2690
6e72f9df 2691/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 2692
954c1994
GS
2693/*
2694=for apidoc p||eval_sv
2695
2696Tells Perl to C<eval> the string in the SV.
2697
2698=cut
2699*/
2700
a0d0e21e 2701I32
864dbfa3 2702Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 2703
8ac85365 2704 /* See G_* flags in cop.h */
a0d0e21e 2705{
97aff369 2706 dVAR;
924508f0 2707 dSP;
a0d0e21e 2708 UNOP myop; /* fake syntax tree node */
8ea43dc8
SP
2709 VOL I32 oldmark = SP - PL_stack_base;
2710 VOL I32 retval = 0;
6224f72b 2711 int ret;
c4420975 2712 OP* const oldop = PL_op;
db36c5a1 2713 dJMPENV;
84902520 2714
4633a7c4
LW
2715 if (flags & G_DISCARD) {
2716 ENTER;
2717 SAVETMPS;
2718 }
2719
462e5cf6 2720 SAVEOP();
533c011a
NIS
2721 PL_op = (OP*)&myop;
2722 Zero(PL_op, 1, UNOP);
3280af22
NIS
2723 EXTEND(PL_stack_sp, 1);
2724 *++PL_stack_sp = sv;
79072805 2725
4633a7c4
LW
2726 if (!(flags & G_NOARGS))
2727 myop.op_flags = OPf_STACKED;
5f66b61c 2728 myop.op_next = NULL;
6e72f9df 2729 myop.op_type = OP_ENTEREVAL;
54310121
PP
2730 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2731 (flags & G_ARRAY) ? OPf_WANT_LIST :
2732 OPf_WANT_SCALAR);
6e72f9df
PP
2733 if (flags & G_KEEPERR)
2734 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2735
dedbcade
DM
2736 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2737 * before a PUSHEVAL, which corrupts the stack after a croak */
2738 TAINT_PROPER("eval_sv()");
2739
14dd3ad8 2740 JMPENV_PUSH(ret);
6224f72b
GS
2741 switch (ret) {
2742 case 0:
14dd3ad8 2743 redo_body:
d6f07c05 2744 CALL_BODY_EVAL((OP*)&myop);
312caa8e
CS
2745 retval = PL_stack_sp - (PL_stack_base + oldmark);
2746 if (!(flags & G_KEEPERR))
c69006e4 2747 sv_setpvn(ERRSV,"",0);
4633a7c4 2748 break;
6224f72b 2749 case 1:
f86702cc 2750 STATUS_ALL_FAILURE;
4633a7c4 2751 /* FALL THROUGH */
6224f72b 2752 case 2:
4633a7c4 2753 /* my_exit() was called */
3280af22 2754 PL_curstash = PL_defstash;
4633a7c4 2755 FREETMPS;
14dd3ad8 2756 JMPENV_POP;
cc3604b1 2757 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2758 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2759 my_exit_jump();
4633a7c4 2760 /* NOTREACHED */
6224f72b 2761 case 3:
3280af22 2762 if (PL_restartop) {
533c011a 2763 PL_op = PL_restartop;
3280af22 2764 PL_restartop = 0;
312caa8e 2765 goto redo_body;
4633a7c4 2766 }
3280af22 2767 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2768 if (flags & G_ARRAY)
2769 retval = 0;
2770 else {
2771 retval = 1;
3280af22 2772 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2773 }
312caa8e 2774 break;
4633a7c4
LW
2775 }
2776
14dd3ad8 2777 JMPENV_POP;
4633a7c4 2778 if (flags & G_DISCARD) {
3280af22 2779 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2780 retval = 0;
2781 FREETMPS;
2782 LEAVE;
2783 }
533c011a 2784 PL_op = oldop;
4633a7c4
LW
2785 return retval;
2786}
2787
954c1994
GS
2788/*
2789=for apidoc p||eval_pv
2790
2791Tells Perl to C<eval> the given string and return an SV* result.
2792
2793=cut
2794*/
2795
137443ea 2796SV*
864dbfa3 2797Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 2798{
97aff369 2799 dVAR;
137443ea
PP
2800 dSP;
2801 SV* sv = newSVpv(p, 0);
2802
864dbfa3 2803 eval_sv(sv, G_SCALAR);
137443ea
PP
2804 SvREFCNT_dec(sv);
2805
2806 SPAGAIN;
2807 sv = POPs;
2808 PUTBACK;
2809
2d8e6c8d 2810 if (croak_on_error && SvTRUE(ERRSV)) {
0510663f 2811 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2d8e6c8d 2812 }
137443ea
PP
2813
2814 return sv;
2815}
2816
4633a7c4
LW
2817/* Require a module. */
2818
954c1994 2819/*
ccfc67b7
JH
2820=head1 Embedding Functions
2821
954c1994
GS
2822=for apidoc p||require_pv
2823
7d3fb230
BS
2824Tells Perl to C<require> the file named by the string argument. It is
2825analogous to the Perl code C<eval "require '$file'">. It's even
2307c6d0 2826implemented that way; consider using load_module instead.
954c1994 2827
7d3fb230 2828=cut */
954c1994 2829
4633a7c4 2830void
864dbfa3 2831Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2832{
97aff369 2833 dVAR;
d3acc0f7 2834 dSP;
97aff369 2835 SV* sv;
e788e7d3 2836 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7 2837 PUTBACK;
be41e5d9
NC
2838 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2839 eval_sv(sv_2mortal(sv), G_DISCARD);
d3acc0f7
JP
2840 SPAGAIN;
2841 POPSTACK;
79072805
LW
2842}
2843
79072805 2844void
e1ec3a88 2845Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
79072805 2846{
71315bf2 2847 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
79072805 2848
c4420975 2849 if (gv)
14befaf4 2850 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2851}
2852
76e3520e 2853STATIC void
e1ec3a88 2854S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
4633a7c4 2855{
ab821d7f 2856 /* This message really ought to be max 23 lines.
75c72d73 2857 * Removed -h because the user already knows that option. Others? */
fb73857a 2858
27da23d5 2859 static const char * const usage_msg[] = {
aefc56c5 2860"-0[octal] specify record separator (\\0, if no argument)",
aefc56c5
SF
2861"-a autosplit mode with -n or -p (splits $_ into @F)",
2862"-C[number/list] enables the listed Unicode features",
2863"-c check syntax only (runs BEGIN and CHECK blocks)",
2864"-d[:debugger] run program under debugger",
2865"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2866"-e program one line of program (several -e's allowed, omit programfile)",
bc9b29db 2867"-E program like -e, but enables all optional features",
aefc56c5 2868"-f don't do $sitelib/sitecustomize.pl at startup",
aefc56c5
SF
2869"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2870"-i[extension] edit <> files in place (makes backup if extension supplied)",
2871"-Idirectory specify @INC/#include directory (several -I's allowed)",
2872"-l[octal] enable line ending processing, specifies line terminator",
2873"-[mM][-]module execute \"use/no module...\" before executing program",
2874"-n assume \"while (<>) { ... }\" loop around program",
2875"-p assume loop like -n but print line also, like sed",
2876"-P run program through C preprocessor before compilation",
2877"-s enable rudimentary parsing for switches after programfile",
2878"-S look for programfile using PATH environment variable",
2879"-t enable tainting warnings",
2880"-T enable tainting checks",
2881"-u dump core after parsing program",
2882"-U allow unsafe operations",
2883"-v print version, subversion (includes VERY IMPORTANT perl info)",
2884"-V[:variable] print configuration summary (or a single Config.pm variable)",
2885"-w enable many useful warnings (RECOMMENDED)",
2886"-W enable all warnings",
2887"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2888"-X disable all warnings",
fb73857a
PP
2889"\n",
2890NULL
2891};
27da23d5 2892 const char * const *p = usage_msg;
fb73857a 2893
b0e47665
GS
2894 PerlIO_printf(PerlIO_stdout(),
2895 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2896 name);
fb73857a 2897 while (*p)
b0e47665 2898 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2899}
2900
b4ab917c
DM
2901/* convert a string of -D options (or digits) into an int.
2902 * sets *s to point to the char after the options */
2903
2904#ifdef DEBUGGING
2905int
e1ec3a88 2906Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
b4ab917c 2907{
27da23d5 2908 static const char * const usage_msgd[] = {
e6e64d9b
JC
2909 " Debugging flag values: (see also -d)",
2910 " p Tokenizing and parsing (with v, displays parse stack)",
3679267a 2911 " s Stack snapshots (with v, displays all stacks)",
e6e64d9b
JC
2912 " l Context (loop) stack processing",
2913 " t Trace execution",
2914 " o Method and overloading resolution",
2915 " c String/numeric conversions",
2916 " P Print profiling info, preprocessor command for -P, source file input state",
2917 " m Memory allocation",
2918 " f Format processing",
2919 " r Regular expression parsing and execution",
2920 " x Syntax tree dump",
3679267a 2921 " u Tainting checks",
e6e64d9b
JC
2922 " H Hash dump -- usurps values()",
2923 " X Scratchpad allocation",
2924 " D Cleaning up",
2925 " S Thread synchronization",
2926 " T Tokenising",
2927 " R Include reference counts of dumped variables (eg when using -Ds)",
2928 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2929 " v Verbose: use in conjunction with other flags",
2930 " C Copy On Write",
2931 " A Consistency checks on internal structures",
3679267a 2932 " q quiet - currently only suppresses the 'EXECUTING' message",
e6e64d9b
JC
2933 NULL
2934 };
b4ab917c
DM
2935 int i = 0;
2936 if (isALPHA(**s)) {
2937 /* if adding extra options, remember to update DEBUG_MASK */
88d2d28a 2938 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
b4ab917c
DM
2939
2940 for (; isALNUM(**s); (*s)++) {
c4420975 2941 const char * const d = strchr(debopts,**s);
b4ab917c
DM
2942 if (d)
2943 i |= 1 << (d - debopts);
2944 else if (ckWARN_d(WARN_DEBUGGING))
e6e64d9b
JC
2945 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2946 "invalid option -D%c, use -D'' to see choices\n", **s);
b4ab917c
DM
2947 }
2948 }
e6e64d9b 2949 else if (isDIGIT(**s)) {
b4ab917c
DM
2950 i = atoi(*s);
2951 for (; isALNUM(**s); (*s)++) ;
2952 }
ddcf8bc1 2953 else if (givehelp) {
06e869a4 2954 const char *const *p = usage_msgd;
e6e64d9b
JC
2955 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2956 }
b4ab917c
DM
2957# ifdef EBCDIC
2958 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2959 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2960 "-Dp not implemented on this platform\n");
2961# endif
2962 return i;
2963}
2964#endif
2965
79072805
LW
2966/* This routine handles any switches that can be given during run */
2967
c7030b81
NC
2968const char *
2969Perl_moreswitches(pTHX_ const char *s)
79072805 2970{
27da23d5 2971 dVAR;
84c133a0 2972 UV rschar;
79072805
LW
2973
2974 switch (*s) {
2975 case '0':
a863c7d1 2976 {
f2095865 2977 I32 flags = 0;
a3b680e6 2978 STRLEN numlen;
f2095865
JH
2979
2980 SvREFCNT_dec(PL_rs);
2981 if (s[1] == 'x' && s[2]) {
a3b680e6 2982 const char *e = s+=2;
f2095865
JH
2983 U8 *tmps;
2984
a3b680e6
AL
2985 while (*e)
2986 e++;
f2095865
JH
2987 numlen = e - s;
2988 flags = PERL_SCAN_SILENT_ILLDIGIT;
2989 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2990 if (s + numlen < e) {
2991 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2992 numlen = 0;
2993 s--;
2994 }
396482e1 2995 PL_rs = newSVpvs("");
c5661c80 2996 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
f2095865
JH
2997 tmps = (U8*)SvPVX(PL_rs);
2998 uvchr_to_utf8(tmps, rschar);
2999 SvCUR_set(PL_rs, UNISKIP(rschar));
3000 SvUTF8_on(PL_rs);
3001 }
3002 else {
3003 numlen = 4;
3004 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3005 if (rschar & ~((U8)~0))
3006 PL_rs = &PL_sv_undef;
3007 else if (!rschar && numlen >= 2)
396482e1 3008 PL_rs = newSVpvs("");
f2095865
JH
3009 else {
3010 char ch = (char)rschar;
3011 PL_rs = newSVpvn(&ch, 1);
3012 }
3013 }
800633c3 3014 sv_setsv(get_sv("/", TRUE), PL_rs);
f2095865 3015 return s + numlen;
a863c7d1 3016 }
46487f74 3017 case 'C':
a05d7ebb 3018 s++;
dd374669 3019 PL_unicode = parse_unicode_opts( (const char **)&s );
5a22a2bb
NC
3020 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3021 PL_utf8cache = -1;
46487f74 3022 return s;
2304df62 3023 case 'F':
3280af22 3024 PL_minus_F = TRUE;
ebce5377
RGS
3025 PL_splitstr = ++s;
3026 while (*s && !isSPACE(*s)) ++s;
e49e380e 3027 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2304df62 3028 return s;
79072805 3029 case 'a':
3280af22 3030 PL_minus_a = TRUE;
79072805
LW
3031 s++;
3032 return s;
3033 case 'c':
3280af22 3034 PL_minus_c = TRUE;
79072805
LW
3035 s++;
3036 return s;
3037 case 'd':
97bd5664 3038 forbid_setid('d', -1);
4633a7c4 3039 s++;
2cbb2ee1
RGS
3040
3041 /* -dt indicates to the debugger that threads will be used */
3042 if (*s == 't' && !isALNUM(s[1])) {
3043 ++s;
3044 my_setenv("PERL5DB_THREADED", "1");
3045 }
3046
70c94a19
RR
3047 /* The following permits -d:Mod to accepts arguments following an =
3048 in the fashion that -MSome::Mod does. */
3049 if (*s == ':' || *s == '=') {
06b5626a 3050 const char *start;
396482e1 3051 SV * const sv = newSVpvs("use Devel::");
70c94a19
RR
3052 start = ++s;
3053 /* We now allow -d:Module=Foo,Bar */
3054 while(isALNUM(*s) || *s==':') ++s;
3055 if (*s != '=')
3056 sv_catpv(sv, start);
3057 else {
3058 sv_catpvn(sv, start, s-start);
95a2b409
RGS
3059 /* Don't use NUL as q// delimiter here, this string goes in the
3060 * environment. */
3061 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
70c94a19 3062 }
4633a7c4 3063 s += strlen(s);
184f32ec 3064 my_setenv("PERL5DB", SvPV_nolen_const(sv));
c4db126b 3065 SvREFCNT_dec(sv);
4633a7c4 3066 }
ed094faf 3067 if (!PL_perldb) {
3280af22 3068 PL_perldb = PERLDB_ALL;
a0d0e21e 3069 init_debugger();
ed094faf 3070 }
79072805
LW
3071 return s;
3072 case 'D':
0453d815 3073 {
79072805 3074#ifdef DEBUGGING
97bd5664 3075 forbid_setid('D', -1);
b4ab917c 3076 s++;
dd374669 3077 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
12a43e32 3078#else /* !DEBUGGING */
0453d815 3079 if (ckWARN_d(WARN_DEBUGGING))
9014280d 3080 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
e6e64d9b 3081 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
a0d0e21e 3082 for (s++; isALNUM(*s); s++) ;
79072805 3083#endif
79072805 3084 return s;
0453d815 3085 }
4633a7c4 3086 case 'h':
ac27b0f5 3087 usage(PL_origargv[0]);
7ca617d0 3088 my_exit(0);
79072805 3089 case 'i':
43c5f42d 3090 Safefree(PL_inplace);
c030f24b
GH
3091#if defined(__CYGWIN__) /* do backup extension automagically */
3092 if (*(s+1) == '\0') {
c86a4f2e 3093 PL_inplace = savepvs(".bak");
c030f24b
GH
3094 return s+1;
3095 }
3096#endif /* __CYGWIN__ */
5ef5d758 3097 {
d4c19fe8 3098 const char * const start = ++s;
5ef5d758
NC
3099 while (*s && !isSPACE(*s))
3100 ++s;
3101
3102 PL_inplace = savepvn(start, s - start);
3103 }
7b8d334a 3104 if (*s) {
5ef5d758 3105 ++s;
7b8d334a 3106 if (*s == '-') /* Additional switches on #! line. */
5ef5d758 3107 s++;
7b8d334a 3108 }
fb73857a 3109 return s;
4e49a025 3110 case 'I': /* -I handled both here and in parse_body() */
97bd5664 3111 forbid_setid('I', -1);
fb73857a
PP
3112 ++s;
3113 while (*s && isSPACE(*s))
3114 ++s;
3115 if (*s) {
c7030b81 3116 const char *e, *p;
0df16ed7
GS
3117 p = s;
3118 /* ignore trailing spaces (possibly followed by other switches) */
3119 do {
3120 for (e = p; *e && !isSPACE(*e); e++) ;
3121 p = e;
3122 while (isSPACE(*p))
3123 p++;
3124 } while (*p && *p != '-');
3125 e = savepvn(s, e-s);
88fe16b2 3126 incpush(e, TRUE, TRUE, FALSE, FALSE);
0df16ed7
GS
3127 Safefree(e);
3128 s = p;
3129 if (*s == '-')
3130 s++;
79072805
LW
3131 }
3132 else
a67e862a 3133 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 3134 return s;
79072805 3135 case 'l':
3280af22 3136 PL_minus_l = TRUE;
79072805 3137 s++;
7889fe52
NIS
3138 if (PL_ors_sv) {
3139 SvREFCNT_dec(PL_ors_sv);
a0714e2c 3140 PL_ors_sv = NULL;
7889fe52 3141 }
79072805 3142 if (isDIGIT(*s)) {
53305cf1 3143 I32 flags = 0;
a3b680e6 3144 STRLEN numlen;
396482e1 3145 PL_ors_sv = newSVpvs("\n");
53305cf1
NC
3146 numlen = 3 + (*s == '0');
3147 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
3148 s += numlen;
3149 }
3150 else {
8bfdd7d9 3151 if (RsPARA(PL_rs)) {
396482e1 3152 PL_ors_sv = newSVpvs("\n\n");
7889fe52
NIS
3153 }
3154 else {
8bfdd7d9 3155 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 3156 }
79072805
LW
3157 }
3158 return s;
1a30305b 3159 case 'M':
97bd5664 3160 forbid_setid('M', -1); /* XXX ? */
1a30305b
PP
3161 /* FALL THROUGH */
3162 case 'm':
97bd5664 3163 forbid_setid('m', -1); /* XXX ? */
1a30305b 3164 if (*++s) {
c7030b81 3165 const char *start;
11343788 3166 SV *sv;
e1ec3a88 3167 const char *use = "use ";
a5f75d66 3168 /* -M-foo == 'no foo' */
d0043bd1
NC
3169 /* Leading space on " no " is deliberate, to make both
3170 possibilities the same length. */
3171 if (*s == '-') { use = " no "; ++s; }
3172 sv = newSVpvn(use,4);
a5f75d66 3173 start = s;
1a30305b 3174 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd
PP
3175 while(isALNUM(*s) || *s==':') ++s;
3176 if (*s != '=') {
11343788 3177 sv_catpv(sv, start);
c07a80fd
PP
3178 if (*(start-1) == 'm') {
3179 if (*s != '\0')
cea2e8a9 3180 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
396482e1 3181 sv_catpvs( sv, " ()");
c07a80fd
PP
3182 }
3183 } else {
6df41af2 3184 if (s == start)
be98fb35
GS
3185 Perl_croak(aTHX_ "Module name required with -%c option",
3186 s[-1]);
11343788 3187 sv_catpvn(sv, start, s-start);
396482e1
GA
3188 sv_catpvs(sv, " split(/,/,q");
3189 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
11343788 3190 sv_catpv(sv, ++s);
396482e1 3191 sv_catpvs(sv, "\0)");
c07a80fd 3192 }
1a30305b 3193 s += strlen(s);
29a861e7 3194 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
1a30305b
PP
3195 }
3196 else
9e81e6a1 3197 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
1a30305b 3198 return s;
79072805 3199 case 'n':
3280af22 3200 PL_minus_n = TRUE;
79072805
LW
3201 s++;
3202 return s;
3203 case 'p':
3280af22 3204 PL_minus_p = TRUE;
79072805
LW
3205 s++;
3206 return s;
3207 case 's':
97bd5664 3208 forbid_setid('s', -1);
3280af22 3209 PL_doswitches = TRUE;
79072805
LW
3210 s++;
3211 return s;
6537fe72
MS
3212 case 't':
3213 if (!PL_tainting)
22f7c9c9 3214 TOO_LATE_FOR('t');
6537fe72
MS
3215 s++;
3216 return s;
463ee0b2 3217 case 'T':
3280af22 3218 if (!PL_tainting)
22f7c9c9 3219 TOO_LATE_FOR('T');
463ee0b2
LW
3220 s++;
3221 return s;
79072805 3222 case 'u':
bf4acbe4
GS
3223#ifdef MACOS_TRADITIONAL
3224 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3225#endif
3280af22 3226 PL_do_undump = TRUE;
79072805
LW
3227 s++;
3228 return s;
3229 case 'U':
3280af22 3230 PL_unsafe = TRUE;
79072805
LW
3231 s++;
3232 return s;
3233 case 'v':
d7aa5382 3234 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3235 upg_version(PL_patchlevel, TRUE);
8e9464f1 3236#if !defined(DGUX)
b0e47665 3237 PerlIO_printf(PerlIO_stdout(),
7850f74c
GA
3238 Perl_form(aTHX_ "\nThis is perl, %"SVf
3239#ifdef PERL_PATCHNUM
3240 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3241#endif
3242 " built for %s",
be2597df 3243 SVfARG(vstringify(PL_patchlevel)),
95b63a38 3244 ARCHNAME));
8e9464f1
JH
3245#else /* DGUX */
3246/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3247 PerlIO_printf(PerlIO_stdout(),
52ea0aec 3248 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
be2597df 3249 SVfARG(vstringify(PL_patchlevel))));
8e9464f1
JH
3250 PerlIO_printf(PerlIO_stdout(),
3251 Perl_form(aTHX_ " built under %s at %s %s\n",
3252 OSNAME, __DATE__, __TIME__));
3253 PerlIO_printf(PerlIO_stdout(),
3254 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 3255 OSVERS));
8e9464f1
JH
3256#endif /* !DGUX */
3257
fb73857a
PP
3258#if defined(LOCAL_PATCH_COUNT)
3259 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
3260 PerlIO_printf(PerlIO_stdout(),
3261 "\n(with %d registered patch%s, "
3262 "see perl -V for more detail)",
bb7a0f54 3263 LOCAL_PATCH_COUNT,
b0e47665 3264 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 3265#endif
1a30305b 3266
b0e47665 3267 PerlIO_printf(PerlIO_stdout(),
34ce1597 3268 "\n\nCopyright 1987-2007, Larry Wall\n");
eae9c151
JH
3269#ifdef MACOS_TRADITIONAL
3270 PerlIO_printf(PerlIO_stdout(),
be3c0a43 3271 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 3272 "maintained by Chris Nandor\n");
eae9c151 3273#endif
79072805 3274#ifdef MSDOS
b0e47665
GS
3275 PerlIO_printf(PerlIO_stdout(),
3276 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff
PP
3277#endif
3278#ifdef DJGPP
b0e47665
GS
3279 PerlIO_printf(PerlIO_stdout(),
3280 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3281 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 3282#endif
79072805 3283#ifdef OS2
b0e47665
GS
3284 PerlIO_printf(PerlIO_stdout(),
3285 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 3286 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 3287#endif
79072805 3288#ifdef atarist
b0e47665
GS
3289 PerlIO_printf(PerlIO_stdout(),
3290 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 3291#endif
a3f9223b 3292#ifdef __BEOS__
b0e47665
GS
3293 PerlIO_printf(PerlIO_stdout(),
3294 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 3295#endif
1d84e8df 3296#ifdef MPE
b0e47665 3297 PerlIO_printf(PerlIO_stdout(),
e583a879 3298 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
1d84e8df 3299#endif
9d116dd7 3300#ifdef OEMVS
b0e47665
GS
3301 PerlIO_printf(PerlIO_stdout(),
3302 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 3303#endif
495c5fdc 3304#ifdef __VOS__
b0e47665 3305 PerlIO_printf(PerlIO_stdout(),
94efb9fb 3306 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 3307#endif
092bebab 3308#ifdef __OPEN_VM
b0e47665
GS
3309 PerlIO_printf(PerlIO_stdout(),
3310 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 3311#endif
a1a0e61e 3312#ifdef POSIX_BC
b0e47665
GS
3313 PerlIO_printf(PerlIO_stdout(),
3314 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 3315#endif
61ae2fbf 3316#ifdef __MINT__
b0e47665
GS
3317 PerlIO_printf(PerlIO_stdout(),
3318 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 3319#endif
f83d2536 3320#ifdef EPOC
b0e47665 3321 PerlIO_printf(PerlIO_stdout(),
be3c0a43 3322 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 3323#endif
e1caacb4 3324#ifdef UNDER_CE
b475b3e6
JH
3325 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3326 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
e1caacb4
JH
3327 wce_hitreturn();
3328#endif
a0fd4948 3329#ifdef __SYMBIAN32__
27da23d5
JH
3330 PerlIO_printf(PerlIO_stdout(),
3331 "Symbian port by Nokia, 2004-2005\n");
3332#endif
baed7233
DL
3333#ifdef BINARY_BUILD_NOTICE
3334 BINARY_BUILD_NOTICE;
3335#endif
b0e47665
GS
3336 PerlIO_printf(PerlIO_stdout(),
3337 "\n\
79072805 3338Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 3339GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687 3340Complete documentation for Perl, including FAQ lists, should be found on\n\
a0288114 3341this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
c9e30dd8 3342Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
7ca617d0 3343 my_exit(0);
79072805 3344 case 'w':
b2e5e6ba 3345 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
ac27b0f5 3346 PL_dowarn |= G_WARN_ON;
b2e5e6ba 3347 }
599cee73
PM
3348 s++;
3349 return s;
3350 case 'W':
ac27b0f5 3351 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d 3352 if (!specialWARN(PL_compiling.cop_warnings))
72dc9ed5 3353 PerlMemShared_free(PL_compiling.cop_warnings);
d3a7d8c7 3354 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
3355 s++;
3356 return s;
3357 case 'X':
ac27b0f5 3358 PL_dowarn = G_WARN_ALL_OFF;
317ea90d 3359 if (!specialWARN(PL_compiling.cop_warnings))
72dc9ed5 3360 PerlMemShared_free(PL_compiling.cop_warnings);
d3a7d8c7 3361 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
3362 s++;
3363 return s;
a0d0e21e 3364 case '*':
79072805
LW
3365 case ' ':
3366 if (s[1] == '-') /* Additional switches on #! line. */
3367 return s+2;
3368 break;
a0d0e21e 3369 case '-':
79072805 3370 case 0:
51882d45 3371#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
3372 case '\r':
3373#endif
79072805
LW
3374 case '\n':
3375 case '\t':
3376 break;
aa689395
PP
3377#ifdef ALTERNATE_SHEBANG
3378 case 'S': /* OS/2 needs -S on "extproc" line. */
3379 break;
3380#endif
a0d0e21e 3381 case 'P':
3280af22 3382 if (PL_preprocess)
a0d0e21e
LW
3383 return s+1;
3384 /* FALL THROUGH */
79072805 3385 default:
cea2e8a9 3386 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805 3387 }
bd61b366 3388 return NULL;
79072805
LW
3389}
3390
3391/* compliments of Tom Christiansen */
3392
3393/* unexec() can be found in the Gnu emacs distribution */
ee580363 3394/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
3395
3396void
864dbfa3 3397Perl_my_unexec(pTHX)
79072805 3398{
b37c2d43 3399 PERL_UNUSED_CONTEXT;
79072805 3400#ifdef UNEXEC
b37c2d43
AL
3401 SV * prog = newSVpv(BIN_EXP, 0);
3402 SV * file = newSVpv(PL_origfilename, 0);
ee580363 3403 int status = 1;
79072805
LW
3404 extern int etext;
3405
396482e1 3406 sv_catpvs(prog, "/perl");
396482e1 3407 sv_catpvs(file, ".perldump");
79072805 3408
ee580363
GS
3409 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3410 /* unexec prints msg to stderr in case of failure */
6ad3d225 3411 PerlProc_exit(status);
79072805 3412#else
a5f75d66
AD
3413# ifdef VMS
3414# include <lib$routines.h>
3415 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
84d78eb7
YO
3416# elif defined(WIN32) || defined(__CYGWIN__)
3417 Perl_croak(aTHX_ "dump is not supported");
aa689395 3418# else
79072805 3419 ABORT(); /* for use with undump */
aa689395 3420# endif
a5f75d66 3421#endif
79072805
LW
3422}
3423
cb68f92d
GS
3424/* initialize curinterp */
3425STATIC void
cea2e8a9 3426S_init_interp(pTHX)
cb68f92d 3427{
97aff369 3428 dVAR;
acfe0abc
GS
3429#ifdef MULTIPLICITY
3430# define PERLVAR(var,type)
3431# define PERLVARA(var,n,type)
3432# if defined(PERL_IMPLICIT_CONTEXT)
b7f7fff6
NC
3433# define PERLVARI(var,type,init) aTHX->var = init;
3434# define PERLVARIC(var,type,init) aTHX->var = init;
3967c732 3435# else
acfe0abc
GS
3436# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3437# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 3438# endif
acfe0abc 3439# include "intrpvar.h"
acfe0abc
GS
3440# undef PERLVAR
3441# undef PERLVARA
3442# undef PERLVARI
3443# undef PERLVARIC
3444#else
3445# define PERLVAR(var,type)
3446# define PERLVARA(var,n,type)
3447# define PERLVARI(var,type,init) PL_##var = init;
3448# define PERLVARIC(var,type,init) PL_##var = init;
3449# include "intrpvar.h"
acfe0abc
GS
3450# undef PERLVAR
3451# undef PERLVARA
3452# undef PERLVARI
3453# undef PERLVARIC
cb68f92d
GS
3454#endif
3455
46ab3289
NC
3456 /* As these are inside a structure, PERLVARI isn't capable of initialising
3457 them */
6c3f0a89
NC
3458 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3459 PL_reg_poscache = PL_reg_starttry = NULL;
cb68f92d
GS
3460}
3461
76e3520e 3462STATIC void
cea2e8a9 3463S_init_main_stash(pTHX)
79072805 3464{
97aff369 3465 dVAR;
463ee0b2 3466 GV *gv;
6e72f9df 3467
3280af22 3468 PL_curstash = PL_defstash = newHV();
23579a14
NC
3469 /* We know that the string "main" will be in the global shared string
3470 table, so it's a small saving to use it rather than allocate another
3471 8 bytes. */
18916d0d 3472 PL_curstname = newSVpvs_share("main");
fafc274c 3473 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
23579a14
NC
3474 /* If we hadn't caused another reference to "main" to be in the shared
3475 string table above, then it would be worth reordering these two,
3476 because otherwise all we do is delete "main" from it as a consequence
3477 of the SvREFCNT_dec, only to add it again with hv_name_set */
adbc6bb1 3478 SvREFCNT_dec(GvHV(gv));
23579a14 3479 hv_name_set(PL_defstash, "main", 4, 0);
b37c2d43 3480 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
463ee0b2 3481 SvREADONLY_on(gv);
fafc274c
NC
3482 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3483 SVt_PVAV)));
5a5094bd 3484 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3280af22 3485 GvMULTI_on(PL_incgv);
fafc274c 3486 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3280af22 3487 GvMULTI_on(PL_hintgv);
fafc274c 3488 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
5a5094bd 3489 SvREFCNT_inc_simple_void(PL_defgv);
fafc274c 3490 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
5a5094bd 3491 SvREFCNT_inc_simple_void(PL_errgv);
3280af22 3492 GvMULTI_on(PL_errgv);
fafc274c 3493 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3280af22 3494 GvMULTI_on(PL_replgv);
cea2e8a9 3495 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
c69033f2
NC
3496#ifdef PERL_DONT_CREATE_GVSV
3497 gv_SVadd(PL_errgv);
3498#endif
38a03e6e
MB
3499 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3500 sv_setpvn(ERRSV, "", 0);
3280af22 3501 PL_curstash = PL_defstash;
11faa288 3502 CopSTASH_set(&PL_compiling, PL_defstash);
5c1737d1
NC
3503 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3504 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3505 SVt_PVHV));
4633a7c4 3506 /* We must init $/ before switches are processed. */
864dbfa3 3507 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
3508}
3509
fdf5d70d 3510STATIC int
cdd8118e 3511S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
2f9285f8 3512 int *suidscript, PerlIO **rsfpp)
79072805 3513{
ae3f3efd 3514#ifndef IAMSUID
e1ec3a88
AL