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1/* perl.c
2 *
4bb101f2 3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
770526c1 4 * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others
a687059c 5 *
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6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
a687059c 8 *
8d063cd8
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9 */
10
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11/*
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
13 */
45d8adaa 14
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15/* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
ddfa107c 18 * function of the interpreter; that can be found in perlmain.c
166f8a29
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19 */
20
ae3f3efd
PS
21/* PSz 12 Nov 03
22 *
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
26 *
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
32 *
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
38 *
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
42 *
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
45 *
46 * References:
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
55 * CVE candidate:
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
62 *
63Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64School of Mathematics and Statistics University of Sydney 2006 Australia
65 *
66 */
67/* PSz 13 Nov 03
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
70 */
71
72/* PSz 18 Feb 04
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
78 */
79
378cc40b 80#include "EXTERN.h"
864dbfa3 81#define PERL_IN_PERL_C
378cc40b 82#include "perl.h"
e3321bb0 83#include "patchlevel.h" /* for local_patches */
378cc40b 84
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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
2aa47728
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95#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
96# ifdef I_SYS_WAIT
97# include <sys/wait.h>
98# endif
bf357333
NC
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> */
54310121 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
e6827a76 140static void
daa7d858 141S_init_tls_and_interp(PerlInterpreter *my_perl)
e6827a76 142{
27da23d5 143 dVAR;
e6827a76
NC
144 if (!PL_curinterp) {
145 PERL_SET_INTERP(my_perl);
3db8f154 146#if defined(USE_ITHREADS)
e6827a76
NC
147 INIT_THREADS;
148 ALLOC_THREAD_KEY;
149 PERL_SET_THX(my_perl);
150 OP_REFCNT_INIT;
151 MUTEX_INIT(&PL_dollarzero_mutex);
06d86050 152# endif
e6827a76
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153 }
154 else {
155 PERL_SET_THX(my_perl);
156 }
157}
06d86050 158
32e30700
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159#ifdef PERL_IMPLICIT_SYS
160PerlInterpreter *
7766f137
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161perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
162 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
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163 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
164 struct IPerlDir* ipD, struct IPerlSock* ipS,
165 struct IPerlProc* ipP)
166{
167 PerlInterpreter *my_perl;
9f653bb5 168 /* Newx() needs interpreter, so call malloc() instead */
32e30700 169 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
e6827a76 170 S_init_tls_and_interp(my_perl);
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171 Zero(my_perl, 1, PerlInterpreter);
172 PL_Mem = ipM;
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173 PL_MemShared = ipMS;
174 PL_MemParse = ipMP;
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175 PL_Env = ipE;
176 PL_StdIO = ipStd;
177 PL_LIO = ipLIO;
178 PL_Dir = ipD;
179 PL_Sock = ipS;
180 PL_Proc = ipP;
7766f137 181
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182 return my_perl;
183}
184#else
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185
186/*
ccfc67b7
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187=head1 Embedding Functions
188
954c1994
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189=for apidoc perl_alloc
190
191Allocates a new Perl interpreter. See L<perlembed>.
192
193=cut
194*/
195
93a17b20 196PerlInterpreter *
cea2e8a9 197perl_alloc(void)
79072805 198{
cea2e8a9 199 PerlInterpreter *my_perl;
79072805 200
9f653bb5 201 /* Newx() needs interpreter, so call malloc() instead */
e8ee3774 202 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
ba869deb 203
e6827a76 204 S_init_tls_and_interp(my_perl);
07409e01 205 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
79072805 206}
32e30700 207#endif /* PERL_IMPLICIT_SYS */
79072805 208
954c1994
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209/*
210=for apidoc perl_construct
211
212Initializes a new Perl interpreter. See L<perlembed>.
213
214=cut
215*/
216
79072805 217void
0cb96387 218perl_construct(pTHXx)
79072805 219{
27da23d5 220 dVAR;
9d4ba2ae 221 PERL_UNUSED_ARG(my_perl);
8990e307 222#ifdef MULTIPLICITY
54aff467 223 init_interp();
ac27b0f5 224 PL_perl_destruct_level = 1;
54aff467
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225#else
226 if (PL_perl_destruct_level > 0)
227 init_interp();
228#endif
33f46ff6 229 /* Init the real globals (and main thread)? */
3280af22 230 if (!PL_linestr) {
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231 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
232
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233 PL_linestr = NEWSV(65,79);
234 sv_upgrade(PL_linestr,SVt_PVIV);
79072805 235
3280af22 236 if (!SvREADONLY(&PL_sv_undef)) {
d689ffdd
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237 /* set read-only and try to insure than we wont see REFCNT==0
238 very often */
239
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240 SvREADONLY_on(&PL_sv_undef);
241 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
79072805 242
3280af22 243 sv_setpv(&PL_sv_no,PL_No);
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244 /* value lookup in void context - happens to have the side effect
245 of caching the numeric forms. */
246 SvIV(&PL_sv_no);
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247 SvNV(&PL_sv_no);
248 SvREADONLY_on(&PL_sv_no);
249 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
79072805 250
3280af22 251 sv_setpv(&PL_sv_yes,PL_Yes);
0309f36e 252 SvIV(&PL_sv_yes);
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253 SvNV(&PL_sv_yes);
254 SvREADONLY_on(&PL_sv_yes);
255 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
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256
257 SvREADONLY_on(&PL_sv_placeholder);
258 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
6e72f9df 259 }
79072805 260
cea2e8a9 261 PL_sighandlerp = Perl_sighandler;
3280af22 262 PL_pidstatus = newHV();
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263 }
264
8bfdd7d9 265 PL_rs = newSVpvn("\n", 1);
dc92893f 266
cea2e8a9 267 init_stacks();
79072805 268
748a9306 269 init_ids();
3280af22 270 PL_lex_state = LEX_NOTPARSING;
a5f75d66 271
312caa8e 272 JMPENV_BOOTSTRAP;
f86702cc 273 STATUS_ALL_SUCCESS;
274
0672f40e 275 init_i18nl10n(1);
36477c24 276 SET_NUMERIC_STANDARD();
0b5b802d 277
ab821d7f 278#if defined(LOCAL_PATCH_COUNT)
3280af22 279 PL_localpatches = local_patches; /* For possible -v */
ab821d7f 280#endif
281
52853b95
GS
282#ifdef HAVE_INTERP_INTERN
283 sys_intern_init();
284#endif
285
3a1ee7e8 286 PerlIO_init(aTHX); /* Hook to IO system */
760ac839 287
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288 PL_fdpid = newAV(); /* for remembering popen pids by fd */
289 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
24944567 290 PL_errors = newSVpvn("",0);
48c6b404 291 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
1f483ca1
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292 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
293 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
1fcf4c12 294#ifdef USE_ITHREADS
13137afc
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295 PL_regex_padav = newAV();
296 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
297 PL_regex_pad = AvARRAY(PL_regex_padav);
1fcf4c12 298#endif
e5dd39fc 299#ifdef USE_REENTRANT_API
59bd0823 300 Perl_reentrant_init(aTHX);
e5dd39fc 301#endif
3d47000e
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302
303 /* Note that strtab is a rather special HV. Assumptions are made
304 about not iterating on it, and not adding tie magic to it.
305 It is properly deallocated in perl_destruct() */
306 PL_strtab = newHV();
307
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308 HvSHAREKEYS_off(PL_strtab); /* mandatory */
309 hv_ksplit(PL_strtab, 512);
310
0631ea03
AB
311#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
312 _dyld_lookup_and_bind
313 ("__environ", (unsigned long *) &environ_pointer, NULL);
314#endif /* environ */
315
2f42fcb0
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316#ifndef PERL_MICRO
317# ifdef USE_ENVIRON_ARRAY
0631ea03 318 PL_origenviron = environ;
2f42fcb0 319# endif
0631ea03
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320#endif
321
5311654c 322 /* Use sysconf(_SC_CLK_TCK) if available, if not
dbc1d986 323 * available or if the sysconf() fails, use the HZ.
27da23d5
JH
324 * BeOS has those, but returns the wrong value.
325 * The HZ if not originally defined has been by now
326 * been defined as CLK_TCK, if available. */
dbc1d986 327#if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
5311654c
JH
328 PL_clocktick = sysconf(_SC_CLK_TCK);
329 if (PL_clocktick <= 0)
330#endif
331 PL_clocktick = HZ;
332
081fc587
AB
333 PL_stashcache = newHV();
334
e6830b13
NC
335 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
336 (int)PERL_VERSION, (int)PERL_SUBVERSION);
d7aa5382 337
27da23d5
JH
338#ifdef HAS_MMAP
339 if (!PL_mmap_page_size) {
340#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
341 {
342 SETERRNO(0, SS_NORMAL);
343# ifdef _SC_PAGESIZE
344 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
345# else
346 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
347# endif
348 if ((long) PL_mmap_page_size < 0) {
349 if (errno) {
350 SV *error = ERRSV;
27da23d5 351 (void) SvUPGRADE(error, SVt_PV);
0510663f 352 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
27da23d5
JH
353 }
354 else
355 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
356 }
357 }
358#else
359# ifdef HAS_GETPAGESIZE
360 PL_mmap_page_size = getpagesize();
361# else
362# if defined(I_SYS_PARAM) && defined(PAGESIZE)
363 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
364# endif
365# endif
366#endif
367 if (PL_mmap_page_size <= 0)
368 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
369 (IV) PL_mmap_page_size);
370 }
371#endif /* HAS_MMAP */
372
373#if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
374 PL_timesbase.tms_utime = 0;
375 PL_timesbase.tms_stime = 0;
376 PL_timesbase.tms_cutime = 0;
377 PL_timesbase.tms_cstime = 0;
378#endif
379
8990e307 380 ENTER;
79072805
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381}
382
954c1994 383/*
62375a60
NIS
384=for apidoc nothreadhook
385
386Stub that provides thread hook for perl_destruct when there are
387no threads.
388
389=cut
390*/
391
392int
4e9e3734 393Perl_nothreadhook(pTHX)
62375a60
NIS
394{
395 return 0;
396}
397
41e4abd8
NC
398#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
399void
400Perl_dump_sv_child(pTHX_ SV *sv)
401{
402 ssize_t got;
bf357333
NC
403 const int sock = PL_dumper_fd;
404 const int debug_fd = PerlIO_fileno(Perl_debug_log);
bf357333
NC
405 union control_un control;
406 struct msghdr msg;
808ad2d0 407 struct iovec vec[2];
bf357333 408 struct cmsghdr *cmptr;
808ad2d0
NC
409 int returned_errno;
410 unsigned char buffer[256];
41e4abd8 411
bf357333 412 if(sock == -1 || debug_fd == -1)
41e4abd8
NC
413 return;
414
415 PerlIO_flush(Perl_debug_log);
416
bf357333
NC
417 /* All these shenanigans are to pass a file descriptor over to our child for
418 it to dump out to. We can't let it hold open the file descriptor when it
419 forks, as the file descriptor it will dump to can turn out to be one end
420 of pipe that some other process will wait on for EOF. (So as it would
421 be open, the wait would be forever. */
422
423 msg.msg_control = control.control;
424 msg.msg_controllen = sizeof(control.control);
425 /* We're a connected socket so we don't need a destination */
426 msg.msg_name = NULL;
427 msg.msg_namelen = 0;
428 msg.msg_iov = vec;
808ad2d0 429 msg.msg_iovlen = 1;
bf357333
NC
430
431 cmptr = CMSG_FIRSTHDR(&msg);
432 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
433 cmptr->cmsg_level = SOL_SOCKET;
434 cmptr->cmsg_type = SCM_RIGHTS;
435 *((int *)CMSG_DATA(cmptr)) = 1;
436
437 vec[0].iov_base = (void*)&sv;
438 vec[0].iov_len = sizeof(sv);
439 got = sendmsg(sock, &msg, 0);
41e4abd8
NC
440
441 if(got < 0) {
bf357333 442 perror("Debug leaking scalars parent sendmsg failed");
41e4abd8
NC
443 abort();
444 }
bf357333
NC
445 if(got < sizeof(sv)) {
446 perror("Debug leaking scalars parent short sendmsg");
41e4abd8
NC
447 abort();
448 }
449
808ad2d0
NC
450 /* Return protocol is
451 int: errno value
452 unsigned char: length of location string (0 for empty)
453 unsigned char*: string (not terminated)
454 */
455 vec[0].iov_base = (void*)&returned_errno;
456 vec[0].iov_len = sizeof(returned_errno);
457 vec[1].iov_base = buffer;
458 vec[1].iov_len = 1;
459
460 got = readv(sock, vec, 2);
41e4abd8
NC
461
462 if(got < 0) {
463 perror("Debug leaking scalars parent read failed");
808ad2d0 464 PerlIO_flush(PerlIO_stderr());
41e4abd8
NC
465 abort();
466 }
808ad2d0 467 if(got < sizeof(returned_errno) + 1) {
41e4abd8 468 perror("Debug leaking scalars parent short read");
808ad2d0 469 PerlIO_flush(PerlIO_stderr());
41e4abd8
NC
470 abort();
471 }
472
808ad2d0
NC
473 if (*buffer) {
474 got = read(sock, buffer + 1, *buffer);
475 if(got < 0) {
476 perror("Debug leaking scalars parent read 2 failed");
477 PerlIO_flush(PerlIO_stderr());
478 abort();
479 }
480
481 if(got < *buffer) {
482 perror("Debug leaking scalars parent short read 2");
483 PerlIO_flush(PerlIO_stderr());
484 abort();
485 }
486 }
487
488 if (returned_errno || *buffer) {
489 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
490 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
491 returned_errno, strerror(returned_errno));
41e4abd8
NC
492 }
493}
494#endif
495
62375a60 496/*
954c1994
GS
497=for apidoc perl_destruct
498
499Shuts down a Perl interpreter. See L<perlembed>.
500
501=cut
502*/
503
31d77e54 504int
0cb96387 505perl_destruct(pTHXx)
79072805 506{
27da23d5 507 dVAR;
7c474504 508 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
a0d0e21e 509 HV *hv;
2aa47728 510#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
2aa47728
NC
511 pid_t child;
512#endif
8990e307 513
9d4ba2ae
AL
514 PERL_UNUSED_ARG(my_perl);
515
7766f137
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516 /* wait for all pseudo-forked children to finish */
517 PERL_WAIT_FOR_CHILDREN;
518
3280af22 519 destruct_level = PL_perl_destruct_level;
4633a7c4
LW
520#ifdef DEBUGGING
521 {
9d4ba2ae
AL
522 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
523 if (s) {
e1ec3a88 524 const int i = atoi(s);
5f05dabc 525 if (destruct_level < i)
526 destruct_level = i;
527 }
4633a7c4
LW
528 }
529#endif
530
27da23d5 531 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
f3faeb53
AB
532 dJMPENV;
533 int x = 0;
534
535 JMPENV_PUSH(x);
1b6737cc 536 PERL_UNUSED_VAR(x);
f3faeb53
AB
537 if (PL_endav && !PL_minus_c)
538 call_list(PL_scopestack_ix, PL_endav);
539 JMPENV_POP;
26f423df 540 }
f3faeb53 541 LEAVE;
a0d0e21e
LW
542 FREETMPS;
543
e00b64d4 544 /* Need to flush since END blocks can produce output */
f13a2bc0 545 my_fflush_all();
e00b64d4 546
62375a60
NIS
547 if (CALL_FPTR(PL_threadhook)(aTHX)) {
548 /* Threads hook has vetoed further cleanup */
b47cad08 549 return STATUS_NATIVE_EXPORT;
62375a60
NIS
550 }
551
2aa47728
NC
552#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
553 if (destruct_level != 0) {
554 /* Fork here to create a child. Our child's job is to preserve the
555 state of scalars prior to destruction, so that we can instruct it
556 to dump any scalars that we later find have leaked.
557 There's no subtlety in this code - it assumes POSIX, and it doesn't
558 fail gracefully */
559 int fd[2];
560
561 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
562 perror("Debug leaking scalars socketpair failed");
563 abort();
564 }
565
566 child = fork();
567 if(child == -1) {
568 perror("Debug leaking scalars fork failed");
569 abort();
570 }
571 if (!child) {
572 /* We are the child */
3125a5a4
NC
573 const int sock = fd[1];
574 const int debug_fd = PerlIO_fileno(Perl_debug_log);
575 int f;
808ad2d0
NC
576 const char *where;
577 /* Our success message is an integer 0, and a char 0 */
578 static const char success[sizeof(int) + 1];
3125a5a4 579
2aa47728 580 close(fd[0]);
2aa47728 581
3125a5a4
NC
582 /* We need to close all other file descriptors otherwise we end up
583 with interesting hangs, where the parent closes its end of a
584 pipe, and sits waiting for (another) child to terminate. Only
585 that child never terminates, because it never gets EOF, because
bf357333
NC
586 we also have the far end of the pipe open. We even need to
587 close the debugging fd, because sometimes it happens to be one
588 end of a pipe, and a process is waiting on the other end for
589 EOF. Normally it would be closed at some point earlier in
590 destruction, but if we happen to cause the pipe to remain open,
591 EOF never occurs, and we get an infinite hang. Hence all the
592 games to pass in a file descriptor if it's actually needed. */
3125a5a4
NC
593
594 f = sysconf(_SC_OPEN_MAX);
595 if(f < 0) {
808ad2d0
NC
596 where = "sysconf failed";
597 goto abort;
3125a5a4
NC
598 }
599 while (f--) {
600 if (f == sock)
601 continue;
3125a5a4
NC
602 close(f);
603 }
604
2aa47728
NC
605 while (1) {
606 SV *target;
bf357333
NC
607 union control_un control;
608 struct msghdr msg;
609 struct iovec vec[1];
610 struct cmsghdr *cmptr;
611 ssize_t got;
612 int got_fd;
613
614 msg.msg_control = control.control;
615 msg.msg_controllen = sizeof(control.control);
616 /* We're a connected socket so we don't need a source */
617 msg.msg_name = NULL;
618 msg.msg_namelen = 0;
619 msg.msg_iov = vec;
620 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
621
622 vec[0].iov_base = (void*)&target;
623 vec[0].iov_len = sizeof(target);
624
625 got = recvmsg(sock, &msg, 0);
2aa47728
NC
626
627 if(got == 0)
628 break;
629 if(got < 0) {
808ad2d0
NC
630 where = "recv failed";
631 goto abort;
2aa47728
NC
632 }
633 if(got < sizeof(target)) {
808ad2d0
NC
634 where = "short recv";
635 goto abort;
2aa47728 636 }
bf357333 637
808ad2d0
NC
638 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
639 where = "no cmsg";
640 goto abort;
641 }
642 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
643 where = "wrong cmsg_len";
644 goto abort;
645 }
646 if(cmptr->cmsg_level != SOL_SOCKET) {
647 where = "wrong cmsg_level";
648 goto abort;
649 }
650 if(cmptr->cmsg_type != SCM_RIGHTS) {
651 where = "wrong cmsg_type";
652 goto abort;
653 }
bf357333
NC
654
655 got_fd = *(int*)CMSG_DATA(cmptr);
656 /* For our last little bit of trickery, put the file descriptor
657 back into Perl_debug_log, as if we never actually closed it
658 */
808ad2d0
NC
659 if(got_fd != debug_fd) {
660 if (dup2(got_fd, debug_fd) == -1) {
661 where = "dup2";
662 goto abort;
663 }
664 }
2aa47728 665 sv_dump(target);
bf357333 666
2aa47728
NC
667 PerlIO_flush(Perl_debug_log);
668
808ad2d0 669 got = write(sock, &success, sizeof(success));
2aa47728
NC
670
671 if(got < 0) {
808ad2d0
NC
672 where = "write failed";
673 goto abort;
2aa47728 674 }
808ad2d0
NC
675 if(got < sizeof(success)) {
676 where = "short write";
677 goto abort;
2aa47728
NC
678 }
679 }
680 _exit(0);
808ad2d0
NC
681 abort:
682 {
683 int send_errno = errno;
684 unsigned char length = (unsigned char) strlen(where);
685 struct iovec failure[3] = {
686 {(void*)&send_errno, sizeof(send_errno)},
687 {&length, 1},
688 {(void*)where, length}
689 };
690 int got = writev(sock, failure, 3);
691 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
692 in the parent if we try to read from the socketpair after the
693 child has exited, even if there was data to read.
694 So sleep a bit to give the parent a fighting chance of
695 reading the data. */
696 sleep(2);
697 _exit((got == -1) ? errno : 0);
698 }
bf357333 699 /* End of child. */
2aa47728 700 }
41e4abd8 701 PL_dumper_fd = fd[0];
2aa47728
NC
702 close(fd[1]);
703 }
704#endif
705
ff0cee69 706 /* We must account for everything. */
707
708 /* Destroy the main CV and syntax tree */
17fbfdf6
NC
709 /* Do this now, because destroying ops can cause new SVs to be generated
710 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
711 PL_curcop to point to a valid op from which the filename structure
712 member is copied. */
713 PL_curcop = &PL_compiling;
3280af22 714 if (PL_main_root) {
4e380990
DM
715 /* ensure comppad/curpad to refer to main's pad */
716 if (CvPADLIST(PL_main_cv)) {
717 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
718 }
3280af22
NIS
719 op_free(PL_main_root);
720 PL_main_root = Nullop;
a0d0e21e 721 }
3280af22
NIS
722 PL_main_start = Nullop;
723 SvREFCNT_dec(PL_main_cv);
724 PL_main_cv = Nullcv;
24d3c518 725 PL_dirty = TRUE;
ff0cee69 726
13621cfb
NIS
727 /* Tell PerlIO we are about to tear things apart in case
728 we have layers which are using resources that should
729 be cleaned up now.
730 */
731
732 PerlIO_destruct(aTHX);
733
3280af22 734 if (PL_sv_objcount) {
a0d0e21e
LW
735 /*
736 * Try to destruct global references. We do this first so that the
737 * destructors and destructees still exist. Some sv's might remain.
738 * Non-referenced objects are on their own.
739 */
a0d0e21e 740 sv_clean_objs();
bf9cdc68 741 PL_sv_objcount = 0;
8990e307
LW
742 }
743
5cd24f17 744 /* unhook hooks which will soon be, or use, destroyed data */
3280af22
NIS
745 SvREFCNT_dec(PL_warnhook);
746 PL_warnhook = Nullsv;
747 SvREFCNT_dec(PL_diehook);
748 PL_diehook = Nullsv;
5cd24f17 749
4b556e6c 750 /* call exit list functions */
3280af22 751 while (PL_exitlistlen-- > 0)
acfe0abc 752 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
4b556e6c 753
3280af22 754 Safefree(PL_exitlist);
4b556e6c 755
1c4916e5
CB
756 PL_exitlist = NULL;
757 PL_exitlistlen = 0;
758
a0d0e21e 759 if (destruct_level == 0){
8990e307 760
a0d0e21e 761 DEBUG_P(debprofdump());
ac27b0f5 762
56a2bab7
NIS
763#if defined(PERLIO_LAYERS)
764 /* No more IO - including error messages ! */
765 PerlIO_cleanup(aTHX);
766#endif
767
a0d0e21e 768 /* The exit() function will do everything that needs doing. */
b47cad08 769 return STATUS_NATIVE_EXPORT;
a0d0e21e 770 }
5dd60ef7 771
551a8b83 772 /* jettison our possibly duplicated environment */
4b647fb0
DM
773 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
774 * so we certainly shouldn't free it here
775 */
2f42fcb0 776#ifndef PERL_MICRO
4b647fb0 777#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
50acdf95 778 if (environ != PL_origenviron && !PL_use_safe_putenv
4efc5df6
GS
779#ifdef USE_ITHREADS
780 /* only main thread can free environ[0] contents */
781 && PL_curinterp == aTHX
782#endif
783 )
784 {
551a8b83
JH
785 I32 i;
786
787 for (i = 0; environ[i]; i++)
4b420006 788 safesysfree(environ[i]);
0631ea03 789
4b420006
JH
790 /* Must use safesysfree() when working with environ. */
791 safesysfree(environ);
551a8b83
JH
792
793 environ = PL_origenviron;
794 }
795#endif
2f42fcb0 796#endif /* !PERL_MICRO */
551a8b83 797
804ffa60
DM
798 /* reset so print() ends up where we expect */
799 setdefout(Nullgv);
800
5f8cb046
DM
801#ifdef USE_ITHREADS
802 /* the syntax tree is shared between clones
803 * so op_free(PL_main_root) only ReREFCNT_dec's
804 * REGEXPs in the parent interpreter
805 * we need to manually ReREFCNT_dec for the clones
806 */
807 {
808 I32 i = AvFILLp(PL_regex_padav) + 1;
809 SV **ary = AvARRAY(PL_regex_padav);
810
811 while (i) {
35061a7e 812 SV *resv = ary[--i];
35061a7e
DM
813
814 if (SvFLAGS(resv) & SVf_BREAK) {
577e12cc 815 /* this is PL_reg_curpm, already freed
35061a7e
DM
816 * flag is set in regexec.c:S_regtry
817 */
818 SvFLAGS(resv) &= ~SVf_BREAK;
3a1ee7e8 819 }
1cc8b4c5
AB
820 else if(SvREPADTMP(resv)) {
821 SvREPADTMP_off(resv);
822 }
a560f29b
NC
823 else if(SvIOKp(resv)) {
824 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
5f8cb046
DM
825 ReREFCNT_dec(re);
826 }
827 }
828 }
829 SvREFCNT_dec(PL_regex_padav);
830 PL_regex_padav = Nullav;
831 PL_regex_pad = NULL;
832#endif
833
081fc587
AB
834 SvREFCNT_dec((SV*) PL_stashcache);
835 PL_stashcache = NULL;
836
5f05dabc 837 /* loosen bonds of global variables */
838
3280af22
NIS
839 if(PL_rsfp) {
840 (void)PerlIO_close(PL_rsfp);
841 PL_rsfp = Nullfp;
8ebc5c01 842 }
843
844 /* Filters for program text */
3280af22
NIS
845 SvREFCNT_dec(PL_rsfp_filters);
846 PL_rsfp_filters = Nullav;
8ebc5c01 847
848 /* switches */
3280af22
NIS
849 PL_preprocess = FALSE;
850 PL_minus_n = FALSE;
851 PL_minus_p = FALSE;
852 PL_minus_l = FALSE;
853 PL_minus_a = FALSE;
854 PL_minus_F = FALSE;
855 PL_doswitches = FALSE;
599cee73 856 PL_dowarn = G_WARN_OFF;
3280af22
NIS
857 PL_doextract = FALSE;
858 PL_sawampersand = FALSE; /* must save all match strings */
3280af22
NIS
859 PL_unsafe = FALSE;
860
861 Safefree(PL_inplace);
862 PL_inplace = Nullch;
a7cb1f99 863 SvREFCNT_dec(PL_patchlevel);
3280af22
NIS
864
865 if (PL_e_script) {
866 SvREFCNT_dec(PL_e_script);
867 PL_e_script = Nullsv;
8ebc5c01 868 }
869
bf9cdc68
RG
870 PL_perldb = 0;
871
8ebc5c01 872 /* magical thingies */
873
7889fe52
NIS
874 SvREFCNT_dec(PL_ofs_sv); /* $, */
875 PL_ofs_sv = Nullsv;
5f05dabc 876
7889fe52
NIS
877 SvREFCNT_dec(PL_ors_sv); /* $\ */
878 PL_ors_sv = Nullsv;
8ebc5c01 879
3280af22
NIS
880 SvREFCNT_dec(PL_rs); /* $/ */
881 PL_rs = Nullsv;
dc92893f 882
d33b2eba
GS
883 PL_multiline = 0; /* $* */
884 Safefree(PL_osname); /* $^O */
885 PL_osname = Nullch;
5f05dabc 886
3280af22
NIS
887 SvREFCNT_dec(PL_statname);
888 PL_statname = Nullsv;
889 PL_statgv = Nullgv;
5f05dabc 890
8ebc5c01 891 /* defgv, aka *_ should be taken care of elsewhere */
892
8ebc5c01 893 /* clean up after study() */
3280af22
NIS
894 SvREFCNT_dec(PL_lastscream);
895 PL_lastscream = Nullsv;
896 Safefree(PL_screamfirst);
897 PL_screamfirst = 0;
898 Safefree(PL_screamnext);
899 PL_screamnext = 0;
8ebc5c01 900
7d5ea4e7
GS
901 /* float buffer */
902 Safefree(PL_efloatbuf);
903 PL_efloatbuf = Nullch;
904 PL_efloatsize = 0;
905
8ebc5c01 906 /* startup and shutdown function lists */
3280af22 907 SvREFCNT_dec(PL_beginav);
5a837c8f 908 SvREFCNT_dec(PL_beginav_save);
3280af22 909 SvREFCNT_dec(PL_endav);
7d30b5c4 910 SvREFCNT_dec(PL_checkav);
ece599bd 911 SvREFCNT_dec(PL_checkav_save);
3280af22
NIS
912 SvREFCNT_dec(PL_initav);
913 PL_beginav = Nullav;
5a837c8f 914 PL_beginav_save = Nullav;
3280af22 915 PL_endav = Nullav;
7d30b5c4 916 PL_checkav = Nullav;
ece599bd 917 PL_checkav_save = Nullav;
3280af22 918 PL_initav = Nullav;
5618dfe8 919
8ebc5c01 920 /* shortcuts just get cleared */
3280af22 921 PL_envgv = Nullgv;
3280af22
NIS
922 PL_incgv = Nullgv;
923 PL_hintgv = Nullgv;
924 PL_errgv = Nullgv;
925 PL_argvgv = Nullgv;
926 PL_argvoutgv = Nullgv;
927 PL_stdingv = Nullgv;
bf49b057 928 PL_stderrgv = Nullgv;
3280af22
NIS
929 PL_last_in_gv = Nullgv;
930 PL_replgv = Nullgv;
bf9cdc68
RG
931 PL_DBgv = Nullgv;
932 PL_DBline = Nullgv;
933 PL_DBsub = Nullgv;
934 PL_DBsingle = Nullsv;
935 PL_DBtrace = Nullsv;
936 PL_DBsignal = Nullsv;
937 PL_DBassertion = Nullsv;
938 PL_DBcv = Nullcv;
939 PL_dbargs = Nullav;
5c831c24 940 PL_debstash = Nullhv;
8ebc5c01 941
7a1c5554
GS
942 SvREFCNT_dec(PL_argvout_stack);
943 PL_argvout_stack = Nullav;
8ebc5c01 944
5c831c24
GS
945 SvREFCNT_dec(PL_modglobal);
946 PL_modglobal = Nullhv;
947 SvREFCNT_dec(PL_preambleav);
948 PL_preambleav = Nullav;
949 SvREFCNT_dec(PL_subname);
950 PL_subname = Nullsv;
951 SvREFCNT_dec(PL_linestr);
952 PL_linestr = Nullsv;
953 SvREFCNT_dec(PL_pidstatus);
954 PL_pidstatus = Nullhv;
955 SvREFCNT_dec(PL_toptarget);
956 PL_toptarget = Nullsv;
957 SvREFCNT_dec(PL_bodytarget);
958 PL_bodytarget = Nullsv;
959 PL_formtarget = Nullsv;
960
d33b2eba 961 /* free locale stuff */
b9582b6a 962#ifdef USE_LOCALE_COLLATE
d33b2eba
GS
963 Safefree(PL_collation_name);
964 PL_collation_name = Nullch;
b9582b6a 965#endif
d33b2eba 966
b9582b6a 967#ifdef USE_LOCALE_NUMERIC
d33b2eba
GS
968 Safefree(PL_numeric_name);
969 PL_numeric_name = Nullch;
a453c169 970 SvREFCNT_dec(PL_numeric_radix_sv);
bf9cdc68 971 PL_numeric_radix_sv = Nullsv;
b9582b6a 972#endif
d33b2eba 973
5c831c24
GS
974 /* clear utf8 character classes */
975 SvREFCNT_dec(PL_utf8_alnum);
976 SvREFCNT_dec(PL_utf8_alnumc);
977 SvREFCNT_dec(PL_utf8_ascii);
978 SvREFCNT_dec(PL_utf8_alpha);
979 SvREFCNT_dec(PL_utf8_space);
980 SvREFCNT_dec(PL_utf8_cntrl);
981 SvREFCNT_dec(PL_utf8_graph);
982 SvREFCNT_dec(PL_utf8_digit);
983 SvREFCNT_dec(PL_utf8_upper);
984 SvREFCNT_dec(PL_utf8_lower);
985 SvREFCNT_dec(PL_utf8_print);
986 SvREFCNT_dec(PL_utf8_punct);
987 SvREFCNT_dec(PL_utf8_xdigit);
988 SvREFCNT_dec(PL_utf8_mark);
989 SvREFCNT_dec(PL_utf8_toupper);
4dbdbdc2 990 SvREFCNT_dec(PL_utf8_totitle);
5c831c24 991 SvREFCNT_dec(PL_utf8_tolower);
b4e400f9 992 SvREFCNT_dec(PL_utf8_tofold);
82686b01
JH
993 SvREFCNT_dec(PL_utf8_idstart);
994 SvREFCNT_dec(PL_utf8_idcont);
5c831c24
GS
995 PL_utf8_alnum = Nullsv;
996 PL_utf8_alnumc = Nullsv;
997 PL_utf8_ascii = Nullsv;
998 PL_utf8_alpha = Nullsv;
999 PL_utf8_space = Nullsv;
1000 PL_utf8_cntrl = Nullsv;
1001 PL_utf8_graph = Nullsv;
1002 PL_utf8_digit = Nullsv;
1003 PL_utf8_upper = Nullsv;
1004 PL_utf8_lower = Nullsv;
1005 PL_utf8_print = Nullsv;
1006 PL_utf8_punct = Nullsv;
1007 PL_utf8_xdigit = Nullsv;
1008 PL_utf8_mark = Nullsv;
1009 PL_utf8_toupper = Nullsv;
1010 PL_utf8_totitle = Nullsv;
1011 PL_utf8_tolower = Nullsv;
b4e400f9 1012 PL_utf8_tofold = Nullsv;
82686b01
JH
1013 PL_utf8_idstart = Nullsv;
1014 PL_utf8_idcont = Nullsv;
5c831c24 1015
971a9dd3
GS
1016 if (!specialWARN(PL_compiling.cop_warnings))
1017 SvREFCNT_dec(PL_compiling.cop_warnings);
5c831c24 1018 PL_compiling.cop_warnings = Nullsv;
ac27b0f5
NIS
1019 if (!specialCopIO(PL_compiling.cop_io))
1020 SvREFCNT_dec(PL_compiling.cop_io);
1021 PL_compiling.cop_io = Nullsv;
05ec9bb3
NIS
1022 CopFILE_free(&PL_compiling);
1023 CopSTASH_free(&PL_compiling);
5c831c24 1024
a0d0e21e 1025 /* Prepare to destruct main symbol table. */
5f05dabc 1026
3280af22
NIS
1027 hv = PL_defstash;
1028 PL_defstash = 0;
a0d0e21e 1029 SvREFCNT_dec(hv);
5c831c24
GS
1030 SvREFCNT_dec(PL_curstname);
1031 PL_curstname = Nullsv;
a0d0e21e 1032
5a844595
GS
1033 /* clear queued errors */
1034 SvREFCNT_dec(PL_errors);
1035 PL_errors = Nullsv;
1036
a0d0e21e 1037 FREETMPS;
0453d815 1038 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
3280af22 1039 if (PL_scopestack_ix != 0)
9014280d 1040 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 1041 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
3280af22
NIS
1042 (long)PL_scopestack_ix);
1043 if (PL_savestack_ix != 0)
9014280d 1044 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 1045 "Unbalanced saves: %ld more saves than restores\n",
3280af22
NIS
1046 (long)PL_savestack_ix);
1047 if (PL_tmps_floor != -1)
9014280d 1048 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
3280af22 1049 (long)PL_tmps_floor + 1);
a0d0e21e 1050 if (cxstack_ix != -1)
9014280d 1051 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
ff0cee69 1052 (long)cxstack_ix + 1);
a0d0e21e 1053 }
8990e307
LW
1054
1055 /* Now absolutely destruct everything, somehow or other, loops or no. */
d33b2eba 1056 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
3280af22 1057 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
5226ed68
JH
1058
1059 /* the 2 is for PL_fdpid and PL_strtab */
1060 while (PL_sv_count > 2 && sv_clean_all())
1061 ;
1062
d33b2eba
GS
1063 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1064 SvFLAGS(PL_fdpid) |= SVt_PVAV;
3280af22
NIS
1065 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1066 SvFLAGS(PL_strtab) |= SVt_PVHV;
d33b2eba 1067
d4777f27
GS
1068 AvREAL_off(PL_fdpid); /* no surviving entries */
1069 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
d33b2eba
GS
1070 PL_fdpid = Nullav;
1071
6c644e78
GS
1072#ifdef HAVE_INTERP_INTERN
1073 sys_intern_clear();
1074#endif
1075
6e72f9df 1076 /* Destruct the global string table. */
1077 {
1078 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1079 * so that sv_free() won't fail on them.
80459961
NC
1080 * Now that the global string table is using a single hunk of memory
1081 * for both HE and HEK, we either need to explicitly unshare it the
1082 * correct way, or actually free things here.
6e72f9df 1083 */
80459961
NC
1084 I32 riter = 0;
1085 const I32 max = HvMAX(PL_strtab);
1086 HE **array = HvARRAY(PL_strtab);
1087 HE *hent = array[0];
1088
6e72f9df 1089 for (;;) {
0453d815 1090 if (hent && ckWARN_d(WARN_INTERNAL)) {
80459961 1091 HE *next = HeNEXT(hent);
9014280d 1092 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
0453d815 1093 "Unbalanced string table refcount: (%d) for \"%s\"",
6e72f9df 1094 HeVAL(hent) - Nullsv, HeKEY(hent));
80459961
NC
1095 Safefree(hent);
1096 hent = next;
6e72f9df 1097 }
1098 if (!hent) {
1099 if (++riter > max)
1100 break;
1101 hent = array[riter];
1102 }
1103 }
80459961
NC
1104
1105 Safefree(array);
1106 HvARRAY(PL_strtab) = 0;
1107 HvTOTALKEYS(PL_strtab) = 0;
1108 HvFILL(PL_strtab) = 0;
6e72f9df 1109 }
3280af22 1110 SvREFCNT_dec(PL_strtab);
6e72f9df 1111
e652bb2f 1112#ifdef USE_ITHREADS
c21d1a0f 1113 /* free the pointer tables used for cloning */
a0739874 1114 ptr_table_free(PL_ptr_table);
bf9cdc68 1115 PL_ptr_table = (PTR_TBL_t*)NULL;
53186e96 1116#endif
a0739874 1117
d33b2eba
GS
1118 /* free special SVs */
1119
1120 SvREFCNT(&PL_sv_yes) = 0;
1121 sv_clear(&PL_sv_yes);
1122 SvANY(&PL_sv_yes) = NULL;
4c5e2b0d 1123 SvFLAGS(&PL_sv_yes) = 0;
d33b2eba
GS
1124
1125 SvREFCNT(&PL_sv_no) = 0;
1126 sv_clear(&PL_sv_no);
1127 SvANY(&PL_sv_no) = NULL;
4c5e2b0d 1128 SvFLAGS(&PL_sv_no) = 0;
01724ea0 1129
9f375a43
DM
1130 {
1131 int i;
1132 for (i=0; i<=2; i++) {
1133 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1134 sv_clear(PERL_DEBUG_PAD(i));
1135 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1136 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1137 }
1138 }
1139
0453d815 1140 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
9014280d 1141 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
6e72f9df 1142
eba0f806
DM
1143#ifdef DEBUG_LEAKING_SCALARS
1144 if (PL_sv_count != 0) {
1145 SV* sva;
1146 SV* sv;
1147 register SV* svend;
1148
1149 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1150 svend = &sva[SvREFCNT(sva)];
1151 for (sv = sva + 1; sv < svend; ++sv) {
1152 if (SvTYPE(sv) != SVTYPEMASK) {
a548cda8 1153 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
61b61456 1154 " flags=0x%"UVxf
fd0854ff
DM
1155 " refcnt=%"UVuf pTHX__FORMAT "\n"
1156 "\tallocated at %s:%d %s %s%s\n",
1157 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1158 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1159 sv->sv_debug_line,
1160 sv->sv_debug_inpad ? "for" : "by",
1161 sv->sv_debug_optype ?
1162 PL_op_name[sv->sv_debug_optype]: "(none)",
1163 sv->sv_debug_cloned ? " (cloned)" : ""
1164 );
2aa47728 1165#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
41e4abd8 1166 Perl_dump_sv_child(aTHX_ sv);
2aa47728 1167#endif
eba0f806
DM
1168 }
1169 }
1170 }
1171 }
2aa47728
NC
1172#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1173 {
1174 int status;
1175 fd_set rset;
1176 /* Wait for up to 4 seconds for child to terminate.
1177 This seems to be the least effort way of timing out on reaping
1178 its exit status. */
1179 struct timeval waitfor = {4, 0};
41e4abd8 1180 int sock = PL_dumper_fd;
2aa47728
NC
1181
1182 shutdown(sock, 1);
1183 FD_ZERO(&rset);
1184 FD_SET(sock, &rset);
1185 select(sock + 1, &rset, NULL, NULL, &waitfor);
1186 waitpid(child, &status, WNOHANG);
1187 close(sock);
1188 }
1189#endif
eba0f806 1190#endif
bf9cdc68 1191 PL_sv_count = 0;
eba0f806
DM
1192
1193
56a2bab7 1194#if defined(PERLIO_LAYERS)
3a1ee7e8
NIS
1195 /* No more IO - including error messages ! */
1196 PerlIO_cleanup(aTHX);
1197#endif
1198
9f4bd222
NIS
1199 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1200 as currently layers use it rather than Nullsv as a marker
1201 for no arg - and will try and SvREFCNT_dec it.
1202 */
1203 SvREFCNT(&PL_sv_undef) = 0;
1204 SvREADONLY_off(&PL_sv_undef);
1205
3280af22 1206 Safefree(PL_origfilename);
bf9cdc68 1207 PL_origfilename = Nullch;
3280af22 1208 Safefree(PL_reg_start_tmp);
bf9cdc68
RG
1209 PL_reg_start_tmp = (char**)NULL;
1210 PL_reg_start_tmpl = 0;
43c5f42d 1211 Safefree(PL_reg_curpm);
82ba1be6 1212 Safefree(PL_reg_poscache);
dd28f7bb 1213 free_tied_hv_pool();
3280af22 1214 Safefree(PL_op_mask);
cf36064f 1215 Safefree(PL_psig_ptr);
bf9cdc68 1216 PL_psig_ptr = (SV**)NULL;
cf36064f 1217 Safefree(PL_psig_name);
bf9cdc68 1218 PL_psig_name = (SV**)NULL;
2c2666fc 1219 Safefree(PL_bitcount);
bf9cdc68 1220 PL_bitcount = Nullch;
ce08f86c 1221 Safefree(PL_psig_pend);
bf9cdc68
RG
1222 PL_psig_pend = (int*)NULL;
1223 PL_formfeed = Nullsv;
6e72f9df 1224 nuke_stacks();
bf9cdc68
RG
1225 PL_tainting = FALSE;
1226 PL_taint_warn = FALSE;
3280af22 1227 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
bf9cdc68 1228 PL_debug = 0;
ac27b0f5 1229
a0d0e21e 1230 DEBUG_P(debprofdump());
d33b2eba 1231
e5dd39fc 1232#ifdef USE_REENTRANT_API
10bc17b6 1233 Perl_reentrant_free(aTHX);
e5dd39fc
AB
1234#endif
1235
612f20c3
GS
1236 sv_free_arenas();
1237
fc36a67e 1238 /* As the absolutely last thing, free the non-arena SV for mess() */
1239
3280af22 1240 if (PL_mess_sv) {
f350b448
NC
1241 /* we know that type == SVt_PVMG */
1242
9c63abab 1243 /* it could have accumulated taint magic */
f350b448
NC
1244 MAGIC* mg;
1245 MAGIC* moremagic;
1246 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1247 moremagic = mg->mg_moremagic;
1248 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1249 && mg->mg_len >= 0)
1250 Safefree(mg->mg_ptr);
1251 Safefree(mg);
9c63abab 1252 }
f350b448 1253
fc36a67e 1254 /* we know that type >= SVt_PV */
8bd4d4c5 1255 SvPV_free(PL_mess_sv);
3280af22
NIS
1256 Safefree(SvANY(PL_mess_sv));
1257 Safefree(PL_mess_sv);
1258 PL_mess_sv = Nullsv;
fc36a67e 1259 }
31d77e54 1260 return STATUS_NATIVE_EXPORT;
79072805
LW
1261}
1262
954c1994
GS
1263/*
1264=for apidoc perl_free
1265
1266Releases a Perl interpreter. See L<perlembed>.
1267
1268=cut
1269*/
1270
79072805 1271void
0cb96387 1272perl_free(pTHXx)
79072805 1273{
acfe0abc 1274#if defined(WIN32) || defined(NETWARE)
ce3e5b80 1275# if defined(PERL_IMPLICIT_SYS)
acfe0abc
GS
1276# ifdef NETWARE
1277 void *host = nw_internal_host;
1278# else
1279 void *host = w32_internal_host;
1280# endif
ce3e5b80 1281 PerlMem_free(aTHXx);
acfe0abc 1282# ifdef NETWARE
011f1a1a 1283 nw_delete_internal_host(host);
acfe0abc
GS
1284# else
1285 win32_delete_internal_host(host);
1286# endif
1c0ca838
GS
1287# else
1288 PerlMem_free(aTHXx);
1289# endif
acfe0abc
GS
1290#else
1291 PerlMem_free(aTHXx);
76e3520e 1292#endif
79072805
LW
1293}
1294
aebd1ac7
GA
1295#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1296/* provide destructors to clean up the thread key when libperl is unloaded */
1297#ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1298
110d3f98 1299#if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
aebd1ac7
GA
1300#pragma fini "perl_fini"
1301#endif
1302
0dbb1585
AL
1303static void
1304#if defined(__GNUC__)
1305__attribute__((destructor))
aebd1ac7 1306#endif
de009b76 1307perl_fini(void)
aebd1ac7 1308{
27da23d5 1309 dVAR;
aebd1ac7
GA
1310 if (PL_curinterp)
1311 FREE_THREAD_KEY;
1312}
1313
1314#endif /* WIN32 */
1315#endif /* THREADS */
1316
4b556e6c 1317void
864dbfa3 1318Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
4b556e6c 1319{
3280af22
NIS
1320 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1321 PL_exitlist[PL_exitlistlen].fn = fn;
1322 PL_exitlist[PL_exitlistlen].ptr = ptr;
1323 ++PL_exitlistlen;
4b556e6c
JD
1324}
1325
56cf6df8
RGS
1326#ifdef HAS_PROCSELFEXE
1327/* This is a function so that we don't hold on to MAXPATHLEN
1328 bytes of stack longer than necessary
1329 */
1330STATIC void
e1ec3a88 1331S_procself_val(pTHX_ SV *sv, const char *arg0)
56cf6df8
RGS
1332{
1333 char buf[MAXPATHLEN];
1334 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1335
1336 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1337 includes a spurious NUL which will cause $^X to fail in system
1338 or backticks (this will prevent extensions from being built and
1339 many tests from working). readlink is not meant to add a NUL.
1340 Normal readlink works fine.
1341 */
1342 if (len > 0 && buf[len-1] == '\0') {
1343 len--;
1344 }
1345
1346 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1347 returning the text "unknown" from the readlink rather than the path
1348 to the executable (or returning an error from the readlink). Any valid
1349 path has a '/' in it somewhere, so use that to validate the result.
1350 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1351 */
1352 if (len > 0 && memchr(buf, '/', len)) {
1353 sv_setpvn(sv,buf,len);
1354 }
1355 else {
1356 sv_setpv(sv,arg0);
1357 }
1358}
1359#endif /* HAS_PROCSELFEXE */
b7975bdd
NC
1360
1361STATIC void
1362S_set_caret_X(pTHX) {
1363 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1364 if (tmpgv) {
1365#ifdef HAS_PROCSELFEXE
1366 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1367#else
1368#ifdef OS2
c69033f2 1369 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
b7975bdd 1370#else
c69033f2 1371 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
b7975bdd
NC
1372#endif
1373#endif
1374 }
1375}
1376
954c1994
GS
1377/*
1378=for apidoc perl_parse
1379
1380Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1381
1382=cut
1383*/
1384
79072805 1385int
0cb96387 1386perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
8d063cd8 1387{
27da23d5 1388 dVAR;
6224f72b 1389 I32 oldscope;
6224f72b 1390 int ret;
db36c5a1 1391 dJMPENV;
8d063cd8 1392
9d4ba2ae
AL
1393 PERL_UNUSED_VAR(my_perl);
1394
a687059c
LW
1395#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1396#ifdef IAMSUID
1397#undef IAMSUID
cea2e8a9 1398 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
a687059c 1399setuid perl scripts securely.\n");
ae3f3efd 1400#endif /* IAMSUID */
a687059c
LW
1401#endif
1402
b0891165
JH
1403#if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1404 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
103dd899 1405 * This MUST be done before any hash stores or fetches take place.
008fb0c0
NC
1406 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1407 * yourself, it is your responsibility to provide a good random seed!
830b38bd 1408 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
008fb0c0
NC
1409 if (!PL_rehash_seed_set)
1410 PL_rehash_seed = get_hash_seed();
b0891165 1411 {
9d4ba2ae 1412 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
bed60192 1413
1b6737cc
AL
1414 if (s && (atoi(s) == 1))
1415 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
b0891165
JH
1416 }
1417#endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1418
3280af22 1419 PL_origargc = argc;
e2975953 1420 PL_origargv = argv;
a0d0e21e 1421
54bfe034 1422 {
3cb9023d
JH
1423 /* Set PL_origalen be the sum of the contiguous argv[]
1424 * elements plus the size of the env in case that it is
e9137a8e 1425 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
3cb9023d
JH
1426 * as the maximum modifiable length of $0. In the worst case
1427 * the area we are able to modify is limited to the size of
43c32782 1428 * the original argv[0]. (See below for 'contiguous', though.)
3cb9023d 1429 * --jhi */
e1ec3a88 1430 const char *s = NULL;
54bfe034 1431 int i;
1b6737cc 1432 const UV mask =
7d8e7db3 1433 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
43c32782 1434 /* Do the mask check only if the args seem like aligned. */
1b6737cc 1435 const UV aligned =
43c32782
JH
1436 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1437
1438 /* See if all the arguments are contiguous in memory. Note
1439 * that 'contiguous' is a loose term because some platforms
1440 * align the argv[] and the envp[]. If the arguments look
1441 * like non-aligned, assume that they are 'strictly' or
1442 * 'traditionally' contiguous. If the arguments look like
1443 * aligned, we just check that they are within aligned
1444 * PTRSIZE bytes. As long as no system has something bizarre
1445 * like the argv[] interleaved with some other data, we are
1446 * fine. (Did I just evoke Murphy's Law?) --jhi */
c8941eeb
JH
1447 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1448 while (*s) s++;
1449 for (i = 1; i < PL_origargc; i++) {
1450 if ((PL_origargv[i] == s + 1
43c32782 1451#ifdef OS2
c8941eeb 1452 || PL_origargv[i] == s + 2
43c32782 1453#endif
c8941eeb
JH
1454 )
1455 ||
1456 (aligned &&
1457 (PL_origargv[i] > s &&
1458 PL_origargv[i] <=
1459 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1460 )
1461 {
1462 s = PL_origargv[i];
1463 while (*s) s++;
1464 }
1465 else
1466 break;
54bfe034 1467 }
54bfe034 1468 }
3cb9023d 1469 /* Can we grab env area too to be used as the area for $0? */
43c32782
JH
1470 if (PL_origenviron) {
1471 if ((PL_origenviron[0] == s + 1
1472#ifdef OS2
1473 || (PL_origenviron[0] == s + 9 && (s += 8))
1474#endif
1475 )
1476 ||
1477 (aligned &&
1478 (PL_origenviron[0] > s &&
1479 PL_origenviron[0] <=
1480 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1481 )
1482 {
1483#ifndef OS2
1484 s = PL_origenviron[0];
1485 while (*s) s++;
1486#endif
1487 my_setenv("NoNe SuCh", Nullch);
1488 /* Force copy of environment. */
1489 for (i = 1; PL_origenviron[i]; i++) {
1490 if (PL_origenviron[i] == s + 1
1491 ||
1492 (aligned &&
1493 (PL_origenviron[i] > s &&
1494 PL_origenviron[i] <=
1495 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1496 )
1497 {
1498 s = PL_origenviron[i];
1499 while (*s) s++;
1500 }
1501 else
1502 break;
54bfe034 1503 }
43c32782 1504 }
54bfe034 1505 }
284e1220 1506 PL_origalen = s - PL_origargv[0] + 1;
54bfe034
JH
1507 }
1508
3280af22 1509 if (PL_do_undump) {
a0d0e21e
LW
1510
1511 /* Come here if running an undumped a.out. */
1512
3280af22
NIS
1513 PL_origfilename = savepv(argv[0]);
1514 PL_do_undump = FALSE;
a0d0e21e 1515 cxstack_ix = -1; /* start label stack again */
748a9306 1516 init_ids();
b7975bdd
NC
1517 assert (!PL_tainted);
1518 TAINT;
1519 S_set_caret_X(aTHX);
1520 TAINT_NOT;
a0d0e21e
LW
1521 init_postdump_symbols(argc,argv,env);
1522 return 0;
1523 }
1524
3280af22 1525 if (PL_main_root) {
3280af22
NIS
1526 op_free(PL_main_root);
1527 PL_main_root = Nullop;
ff0cee69 1528 }
3280af22
NIS
1529 PL_main_start = Nullop;
1530 SvREFCNT_dec(PL_main_cv);
1531 PL_main_cv = Nullcv;
79072805 1532
3280af22
NIS
1533 time(&PL_basetime);
1534 oldscope = PL_scopestack_ix;
599cee73 1535 PL_dowarn = G_WARN_OFF;
f86702cc 1536
14dd3ad8 1537 JMPENV_PUSH(ret);
6224f72b 1538 switch (ret) {
312caa8e 1539 case 0:
14dd3ad8 1540 parse_body(env,xsinit);
7d30b5c4
GS
1541 if (PL_checkav)
1542 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1543 ret = 0;
1544 break;
6224f72b
GS
1545 case 1:
1546 STATUS_ALL_FAILURE;
1547 /* FALL THROUGH */
1548 case 2:
1549 /* my_exit() was called */
3280af22 1550 while (PL_scopestack_ix > oldscope)
6224f72b
GS
1551 LEAVE;
1552 FREETMPS;
3280af22 1553 PL_curstash = PL_defstash;
7d30b5c4
GS
1554 if (PL_checkav)
1555 call_list(oldscope, PL_checkav);
14dd3ad8
GS
1556 ret = STATUS_NATIVE_EXPORT;
1557 break;
6224f72b 1558 case 3:
bf49b057 1559 PerlIO_printf(Perl_error_log, "panic: top_env\n");
14dd3ad8
GS
1560 ret = 1;
1561 break;
6224f72b 1562 }
14dd3ad8
GS
1563 JMPENV_POP;
1564 return ret;
1565}
1566
312caa8e 1567STATIC void *
14dd3ad8 1568S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
312caa8e 1569{
27da23d5 1570 dVAR;
312caa8e 1571 int argc = PL_origargc;
8f42b153 1572 char **argv = PL_origargv;
e1ec3a88 1573 const char *scriptname = NULL;
312caa8e 1574 VOL bool dosearch = FALSE;
e1ec3a88 1575 const char *validarg = "";
312caa8e
CS
1576 register SV *sv;
1577 register char *s;
e1ec3a88 1578 const char *cddir = Nullch;
ab019eaa 1579#ifdef USE_SITECUSTOMIZE
20ef40cf 1580 bool minus_f = FALSE;
ab019eaa 1581#endif
312caa8e 1582
ae3f3efd
PS
1583 PL_fdscript = -1;
1584 PL_suidscript = -1;
3280af22 1585 sv_setpvn(PL_linestr,"",0);
79cb57f6 1586 sv = newSVpvn("",0); /* first used for -I flags */
6224f72b
GS
1587 SAVEFREESV(sv);
1588 init_main_stash();
54310121 1589
6224f72b
GS
1590 for (argc--,argv++; argc > 0; argc--,argv++) {
1591 if (argv[0][0] != '-' || !argv[0][1])
1592 break;
1593#ifdef DOSUID
1594 if (*validarg)
1595 validarg = " PHOOEY ";
1596 else
1597 validarg = argv[0];
ae3f3efd
PS
1598 /*
1599 * Can we rely on the kernel to start scripts with argv[1] set to
1600 * contain all #! line switches (the whole line)? (argv[0] is set to
1601 * the interpreter name, argv[2] to the script name; argv[3] and
1602 * above may contain other arguments.)
1603 */
13281fa4 1604#endif
6224f72b
GS
1605 s = argv[0]+1;
1606 reswitch:
1607 switch (*s) {
729a02f2 1608 case 'C':
1d5472a9
GS
1609#ifndef PERL_STRICT_CR
1610 case '\r':
1611#endif
6224f72b
GS
1612 case ' ':
1613 case '0':
1614 case 'F':
1615 case 'a':
1616 case 'c':
1617 case 'd':
1618 case 'D':
1619 case 'h':
1620 case 'i':
1621 case 'l':
1622 case 'M':
1623 case 'm':
1624 case 'n':
1625 case 'p':
1626 case 's':
1627 case 'u':
1628 case 'U':
1629 case 'v':
599cee73
PM
1630 case 'W':
1631 case 'X':
6224f72b 1632 case 'w':
06492da6 1633 case 'A':
155aba94 1634 if ((s = moreswitches(s)))
6224f72b
GS
1635 goto reswitch;
1636 break;
33b78306 1637
1dbad523 1638 case 't':
22f7c9c9 1639 CHECK_MALLOC_TOO_LATE_FOR('t');
317ea90d
MS
1640 if( !PL_tainting ) {
1641 PL_taint_warn = TRUE;
1642 PL_tainting = TRUE;
1643 }
1644 s++;
1645 goto reswitch;
6224f72b 1646 case 'T':
22f7c9c9 1647 CHECK_MALLOC_TOO_LATE_FOR('T');
3280af22 1648 PL_tainting = TRUE;
317ea90d 1649 PL_taint_warn = FALSE;
6224f72b
GS
1650 s++;
1651 goto reswitch;
f86702cc 1652
6224f72b 1653 case 'e':
bf4acbe4
GS
1654#ifdef MACOS_TRADITIONAL
1655 /* ignore -e for Dev:Pseudo argument */
1656 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
e55ac0fa 1657 break;
bf4acbe4 1658#endif
ae3f3efd 1659 forbid_setid("-e");
3280af22 1660 if (!PL_e_script) {
79cb57f6 1661 PL_e_script = newSVpvn("",0);
0cb96387 1662 filter_add(read_e_script, NULL);
6224f72b
GS
1663 }
1664 if (*++s)
3280af22 1665 sv_catpv(PL_e_script, s);
6224f72b 1666 else if (argv[1]) {
3280af22 1667 sv_catpv(PL_e_script, argv[1]);
6224f72b
GS
1668 argc--,argv++;
1669 }
1670 else
cea2e8a9 1671 Perl_croak(aTHX_ "No code specified for -e");
3280af22 1672 sv_catpv(PL_e_script, "\n");
6224f72b 1673 break;
afe37c7d 1674
20ef40cf 1675 case 'f':
f5542d3a 1676#ifdef USE_SITECUSTOMIZE
20ef40cf 1677 minus_f = TRUE;
f5542d3a 1678#endif
20ef40cf
GA
1679 s++;
1680 goto reswitch;
1681
6224f72b
GS
1682 case 'I': /* -I handled both here and in moreswitches() */
1683 forbid_setid("-I");
1684 if (!*++s && (s=argv[1]) != Nullch) {
1685 argc--,argv++;
1686 }
6224f72b 1687 if (s && *s) {
0df16ed7
GS
1688 char *p;
1689 STRLEN len = strlen(s);
1690 p = savepvn(s, len);
88fe16b2 1691 incpush(p, TRUE, TRUE, FALSE, FALSE);
0df16ed7
GS
1692 sv_catpvn(sv, "-I", 2);
1693 sv_catpvn(sv, p, len);
1694 sv_catpvn(sv, " ", 1);
6224f72b 1695 Safefree(p);
0df16ed7
GS
1696 }
1697 else
a67e862a 1698 Perl_croak(aTHX_ "No directory specified for -I");
6224f72b
GS
1699 break;
1700 case 'P':
1701 forbid_setid("-P");
3280af22 1702 PL_preprocess = TRUE;
6224f72b
GS
1703 s++;
1704 goto reswitch;
1705 case 'S':
1706 forbid_setid("-S");
1707 dosearch = TRUE;
1708 s++;
1709 goto reswitch;
1710 case 'V':
7edfd0ef
NC
1711 {
1712 SV *opts_prog;
1713
1714 if (!PL_preambleav)
1715 PL_preambleav = newAV();
1716 av_push(PL_preambleav,
1717 newSVpv("use Config;",0));
1718 if (*++s != ':') {
1719 STRLEN opts;
1720
1721 opts_prog = newSVpv("print Config::myconfig(),",0);
6224f72b 1722#ifdef VMS
7edfd0ef 1723 sv_catpv(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
6224f72b 1724#else
7edfd0ef 1725 sv_catpv(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
6224f72b 1726#endif
7edfd0ef 1727 opts = SvCUR(opts_prog);
efcaa95b 1728
7edfd0ef 1729 sv_catpv(opts_prog,"\" Compile-time options:");
6224f72b 1730# ifdef DEBUGGING
7edfd0ef 1731 sv_catpv(opts_prog," DEBUGGING");
6224f72b 1732# endif
85e1fcb9
SH
1733# ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1734 sv_catpv(opts_prog," DEBUG_LEAKING_SCALARS_FORK_DUMP");
1735# endif
1736# ifdef FAKE_THREADS
1737 sv_catpv(opts_prog," FAKE_THREADS");
1738# endif
6224f72b 1739# ifdef MULTIPLICITY
7edfd0ef 1740 sv_catpv(opts_prog," MULTIPLICITY");
6224f72b 1741# endif
85e1fcb9
SH
1742# ifdef MYMALLOC
1743 sv_catpv(opts_prog," MYMALLOC");
1744# endif
1745# ifdef PERL_DONT_CREATE_GVSV
1746 sv_catpv(opts_prog," PERL_DONT_CREATE_GVSV");
1747# endif
1748# ifdef PERL_GLOBAL_STRUCT
1749 sv_catpv(opts_prog," PERL_GLOBAL_STRUCT");
1750# endif
1751# ifdef PERL_IMPLICIT_CONTEXT
1752 sv_catpv(opts_prog," PERL_IMPLICIT_CONTEXT");
1753# endif
1754# ifdef PERL_IMPLICIT_SYS
1755 sv_catpv(opts_prog," PERL_IMPLICIT_SYS");
1756# endif
1757# ifdef PERL_MALLOC_WRAP
1758 sv_catpv(opts_prog," PERL_MALLOC_WRAP");
1759# endif
1760# ifdef PERL_NEED_APPCTX
1761 sv_catpv(opts_prog," PERL_NEED_APPCTX");
1762# endif
1763# ifdef PERL_NEED_TIMESBASE
1764 sv_catpv(opts_prog," PERL_NEED_TIMESBASE");
1765# endif
1766# ifdef PERL_OLD_COPY_ON_WRITE
1767 sv_catpv(opts_prog," PERL_OLD_COPY_ON_WRITE");
1768# endif
1769# ifdef PL_OP_SLAB_ALLOC
1770 sv_catpv(opts_prog," PL_OP_SLAB_ALLOC");
1771# endif
1772# ifdef THREADS_HAVE_PIDS
1773 sv_catpv(opts_prog," THREADS_HAVE_PIDS");
1774# endif
4d1ff10f 1775# ifdef USE_5005THREADS
7edfd0ef 1776 sv_catpv(opts_prog," USE_5005THREADS");
b363f7ed 1777# endif
85e1fcb9
SH
1778# ifdef USE_64_BIT_ALL
1779 sv_catpv(opts_prog," USE_64_BIT_ALL");
ac5e8965 1780# endif
10cc9d2a 1781# ifdef USE_64_BIT_INT
7edfd0ef 1782 sv_catpv(opts_prog," USE_64_BIT_INT");
10cc9d2a 1783# endif
85e1fcb9
SH
1784# ifdef USE_ITHREADS
1785 sv_catpv(opts_prog," USE_ITHREADS");
1786# endif
1787# ifdef USE_LARGE_FILES
1788 sv_catpv(opts_prog," USE_LARGE_FILES");
ac5e8965
JH
1789# endif
1790# ifdef USE_LONG_DOUBLE
7edfd0ef 1791 sv_catpv(opts_prog," USE_LONG_DOUBLE");
ac5e8965 1792# endif
85e1fcb9
SH
1793# ifdef USE_PERLIO
1794 sv_catpv(opts_prog," USE_PERLIO");
53430762 1795# endif
85e1fcb9
SH
1796# ifdef USE_REENTRANT_API
1797 sv_catpv(opts_prog," USE_REENTRANT_API");
1798# endif
1799# ifdef USE_SFIO
1800 sv_catpv(opts_prog," USE_SFIO");
ac5e8965 1801# endif
20ef40cf 1802# ifdef USE_SITECUSTOMIZE
7edfd0ef 1803 sv_catpv(opts_prog," USE_SITECUSTOMIZE");
20ef40cf 1804# endif
85e1fcb9
SH
1805# ifdef USE_SOCKS
1806 sv_catpv(opts_prog," USE_SOCKS");
b363f7ed 1807# endif
efcaa95b 1808
7edfd0ef
NC
1809 while (SvCUR(opts_prog) > opts+76) {
1810 /* find last space after "options: " and before col 76
1811 */
efcaa95b 1812
7edfd0ef
NC
1813 const char *space;
1814 char *pv = SvPV_nolen(opts_prog);
1815 const char c = pv[opts+76];
1816 pv[opts+76] = '\0';
1817 space = strrchr(pv+opts+26, ' ');
1818 pv[opts+76] = c;
1819 if (!space) break; /* "Can't happen" */
efcaa95b 1820
7edfd0ef 1821 /* break the line before that space */
efcaa95b 1822
7edfd0ef
NC
1823 opts = space - pv;
1824 sv_insert(opts_prog, opts, 0,
1825 "\\n ", 25);
1826 }
efcaa95b 1827
7edfd0ef 1828 sv_catpv(opts_prog,"\\n\",");
b363f7ed 1829
6224f72b 1830#if defined(LOCAL_PATCH_COUNT)
7edfd0ef
NC
1831 if (LOCAL_PATCH_COUNT > 0) {
1832 int i;
1833 sv_catpv(opts_prog,
1834 "\" Locally applied patches:\\n\",");
1835 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1836 if (PL_localpatches[i])
1837 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1838 0, PL_localpatches[i], 0);
1839 }
6224f72b 1840 }
6224f72b 1841#endif
7edfd0ef
NC
1842 Perl_sv_catpvf(aTHX_ opts_prog,
1843 "\" Built under %s\\n\"",OSNAME);
6224f72b
GS
1844#ifdef __DATE__
1845# ifdef __TIME__
7edfd0ef
NC
1846 Perl_sv_catpvf(aTHX_ opts_prog,
1847 ",\" Compiled at %s %s\\n\"",__DATE__,
1848 __TIME__);
6224f72b 1849# else
7edfd0ef
NC
1850 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1851 __DATE__);
6224f72b
GS
1852# endif
1853#endif
7edfd0ef
NC
1854 sv_catpv(opts_prog, "; $\"=\"\\n \"; "
1855 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1856 "sort grep {/^PERL/} keys %ENV; ");
69fcd688 1857#ifdef __CYGWIN__
7edfd0ef
NC
1858 sv_catpv(opts_prog,
1859 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
69fcd688 1860#endif
7edfd0ef
NC
1861 sv_catpv(opts_prog,
1862 "print \" \\%ENV:\\n @env\\n\" if @env;"
1863 "print \" \\@INC:\\n @INC\\n\";");
1864 }
1865 else {
1866 ++s;
1867 opts_prog = Perl_newSVpvf(aTHX_
1868 "Config::config_vars(qw%c%s%c)",
1869 0, s, 0);
1870 s += strlen(s);
1871 }
1872 av_push(PL_preambleav, opts_prog);
1873 /* don't look for script or read stdin */
1874 scriptname = BIT_BUCKET;
1875 goto reswitch;
6224f72b 1876 }
6224f72b 1877 case 'x':
3280af22 1878 PL_doextract = TRUE;
6224f72b
GS
1879 s++;
1880 if (*s)
f4c556ac 1881 cddir = s;
6224f72b
GS
1882 break;
1883 case 0:
1884 break;
1885 case '-':
1886 if (!*++s || isSPACE(*s)) {
1887 argc--,argv++;
1888 goto switch_end;
1889 }
1890 /* catch use of gnu style long options */
1891 if (strEQ(s, "version")) {
dd374669 1892 s = (char *)"v";
6224f72b
GS
1893 goto reswitch;
1894 }
1895 if (strEQ(s, "help")) {
dd374669 1896 s = (char *)"h";
6224f72b
GS
1897 goto reswitch;
1898 }
1899 s--;
1900 /* FALL THROUGH */
1901 default:
cea2e8a9 1902 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
8d063cd8
LW
1903 }
1904 }
6224f72b 1905 switch_end:
54310121 1906
f675dbe5
CB
1907 if (
1908#ifndef SECURE_INTERNAL_GETENV
1909 !PL_tainting &&
1910#endif
cf756827 1911 (s = PerlEnv_getenv("PERL5OPT")))
0df16ed7 1912 {
e1ec3a88 1913 const char *popt = s;
74288ac8
GS
1914 while (isSPACE(*s))
1915 s++;
317ea90d 1916 if (*s == '-' && *(s+1) == 'T') {
22f7c9c9 1917 CHECK_MALLOC_TOO_LATE_FOR('T');
74288ac8 1918 PL_tainting = TRUE;
317ea90d
MS
1919 PL_taint_warn = FALSE;
1920 }
74288ac8 1921 else {
cf756827 1922 char *popt_copy = Nullch;
74288ac8 1923 while (s && *s) {
4ea8f8fb 1924 char *d;
74288ac8
GS
1925 while (isSPACE(*s))
1926 s++;
1927 if (*s == '-') {
1928 s++;
1929 if (isSPACE(*s))
1930 continue;
1931 }
4ea8f8fb 1932 d = s;
74288ac8
GS
1933 if (!*s)
1934 break;
06492da6 1935 if (!strchr("DIMUdmtwA", *s))
cea2e8a9 1936 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
4ea8f8fb
MS
1937 while (++s && *s) {
1938 if (isSPACE(*s)) {
cf756827
GS
1939 if (!popt_copy) {
1940 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1941 s = popt_copy + (s - popt);
1942 d = popt_copy + (d - popt);
1943 }
4ea8f8fb
MS
1944 *s++ = '\0';
1945 break;
1946 }
1947 }
1c4db469 1948 if (*d == 't') {
317ea90d
MS
1949 if( !PL_tainting ) {
1950 PL_taint_warn = TRUE;
1951 PL_tainting = TRUE;
1952 }
1c4db469
RGS
1953 } else {
1954 moreswitches(d);
1955 }
6224f72b 1956 }
6224f72b
GS
1957 }
1958 }
a0d0e21e 1959
20ef40cf
GA
1960#ifdef USE_SITECUSTOMIZE
1961 if (!minus_f) {
1962 if (!PL_preambleav)
1963 PL_preambleav = newAV();
1964 av_unshift(PL_preambleav, 1);
1965 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1966 }
1967#endif
1968
317ea90d
MS
1969 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1970 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1971 }
1972
6224f72b
GS
1973 if (!scriptname)
1974 scriptname = argv[0];
3280af22 1975 if (PL_e_script) {
6224f72b
GS
1976 argc++,argv--;
1977 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1978 }
1979 else if (scriptname == Nullch) {
1980#ifdef MSDOS
1981 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1982 moreswitches("h");
1983#endif
1984 scriptname = "-";
1985 }
1986
b7975bdd
NC
1987 /* Set $^X early so that it can be used for relocatable paths in @INC */
1988 assert (!PL_tainted);
1989 TAINT;
1990 S_set_caret_X(aTHX);
1991 TAINT_NOT;
6224f72b
GS
1992 init_perllib();
1993
c5cccb17 1994 open_script(scriptname,dosearch,sv);
6224f72b 1995
c5cccb17 1996 validate_suid(validarg, scriptname);
6224f72b 1997
64ca3a65 1998#ifndef PERL_MICRO
0b5b802d
GS
1999#if defined(SIGCHLD) || defined(SIGCLD)
2000 {
2001#ifndef SIGCHLD
2002# define SIGCHLD SIGCLD
2003#endif
2004 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2005 if (sigstate == SIG_IGN) {
2006 if (ckWARN(WARN_SIGNAL))
9014280d 2007 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
0b5b802d
GS
2008 "Can't ignore signal CHLD, forcing to default");
2009 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2010 }
2011 }
2012#endif
64ca3a65 2013#endif
0b5b802d 2014
bf4acbe4
GS
2015#ifdef MACOS_TRADITIONAL
2016 if (PL_doextract || gMacPerl_AlwaysExtract) {
2017#else
f4c556ac 2018 if (PL_doextract) {
bf4acbe4 2019#endif
6224f72b 2020 find_beginning();
dd374669 2021 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
f4c556ac
GS
2022 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2023
2024 }
6224f72b 2025
3280af22
NIS
2026 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
2027 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2028 CvUNIQUE_on(PL_compcv);
2029
dd2155a4 2030 CvPADLIST(PL_compcv) = pad_new(0);
4d1ff10f 2031#ifdef USE_5005THREADS
533c011a 2032 CvOWNER(PL_compcv) = 0;
a02a5408 2033 Newx(CvMUTEXP(PL_compcv), 1, perl_mutex);
533c011a 2034 MUTEX_INIT(CvMUTEXP(PL_compcv));
4d1ff10f 2035#endif /* USE_5005THREADS */
6224f72b 2036
0c4f7ff0 2037 boot_core_PerlIO();
6224f72b 2038 boot_core_UNIVERSAL();
09bef843 2039 boot_core_xsutils();
6224f72b
GS
2040
2041 if (xsinit)
acfe0abc 2042 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
64ca3a65 2043#ifndef PERL_MICRO
ed79a026 2044#if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
c5be433b 2045 init_os_extras();
6224f72b 2046#endif
64ca3a65 2047#endif
6224f72b 2048
29209bc5 2049#ifdef USE_SOCKS
1b9c9cf5
DH
2050# ifdef HAS_SOCKS5_INIT
2051 socks5_init(argv[0]);
2052# else
29209bc5 2053 SOCKSinit(argv[0]);
1b9c9cf5 2054# endif
ac27b0f5 2055#endif
29209bc5 2056
6224f72b
GS
2057 init_predump_symbols();
2058 /* init_postdump_symbols not currently designed to be called */
2059 /* more than once (ENV isn't cleared first, for example) */
2060 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
3280af22 2061 if (!PL_do_undump)
6224f72b
GS
2062 init_postdump_symbols(argc,argv,env);
2063
27da23d5
JH
2064 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2065 * or explicitly in some platforms.
085a54d9 2066 * locale.c:Perl_init_i18nl10n() if the environment
a05d7ebb 2067 * look like the user wants to use UTF-8. */
27da23d5
JH
2068#if defined(SYMBIAN)
2069 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2070#endif
06e66572
JH
2071 if (PL_unicode) {
2072 /* Requires init_predump_symbols(). */
a05d7ebb 2073 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
06e66572
JH
2074 IO* io;
2075 PerlIO* fp;
2076 SV* sv;
2077
a05d7ebb 2078 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
06e66572 2079 * and the default open disciplines. */
a05d7ebb
JH
2080 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2081 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2082 (fp = IoIFP(io)))
2083 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2084 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2085 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2086 (fp = IoOFP(io)))
2087 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2088 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2089 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2090 (fp = IoOFP(io)))
2091 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2092 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2093 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
2094 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2095 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2096 if (in) {
2097 if (out)
2098 sv_setpvn(sv, ":utf8\0:utf8", 11);
2099 else
2100 sv_setpvn(sv, ":utf8\0", 6);
2101 }
2102 else if (out)
2103 sv_setpvn(sv, "\0:utf8", 6);
2104 SvSETMAGIC(sv);
2105 }
b310b053
JH
2106 }
2107 }
2108
4ffa73a3
JH
2109 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2110 if (strEQ(s, "unsafe"))
2111 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2112 else if (strEQ(s, "safe"))
2113 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2114 else
2115 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2116 }
2117
6224f72b
GS
2118 init_lexer();
2119
2120 /* now parse the script */
2121
93189314 2122 SETERRNO(0,SS_NORMAL);
3280af22 2123 PL_error_count = 0;
bf4acbe4
GS
2124#ifdef MACOS_TRADITIONAL
2125 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2126 if (PL_minus_c)
2127 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2128 else {
2129 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2130 MacPerl_MPWFileName(PL_origfilename));
2131 }
2132 }
2133#else
3280af22
NIS
2134 if (yyparse() || PL_error_count) {
2135 if (PL_minus_c)
cea2e8a9 2136 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
6224f72b 2137 else {
cea2e8a9 2138 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
097ee67d 2139 PL_origfilename);
6224f72b
GS
2140 }
2141 }
bf4acbe4 2142#endif
57843af0 2143 CopLINE_set(PL_curcop, 0);
3280af22
NIS
2144 PL_curstash = PL_defstash;
2145 PL_preprocess = FALSE;
2146 if (PL_e_script) {
2147 SvREFCNT_dec(PL_e_script);
2148 PL_e_script = Nullsv;
6224f72b
GS
2149 }
2150
3280af22 2151 if (PL_do_undump)
6224f72b
GS
2152 my_unexec();
2153
57843af0
GS
2154 if (isWARN_ONCE) {
2155 SAVECOPFILE(PL_curcop);
2156 SAVECOPLINE(PL_curcop);
3280af22 2157 gv_check(PL_defstash);
57843af0 2158 }
6224f72b
GS
2159
2160 LEAVE;
2161 FREETMPS;
2162
2163#ifdef MYMALLOC
2164 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2165 dump_mstats("after compilation:");
2166#endif
2167
2168 ENTER;
3280af22 2169 PL_restartop = 0;
312caa8e 2170 return NULL;
6224f72b
GS
2171}
2172
954c1994
GS
2173/*
2174=for apidoc perl_run
2175
2176Tells a Perl interpreter to run. See L<perlembed>.
2177
2178=cut
2179*/
2180
6224f72b 2181int
0cb96387 2182perl_run(pTHXx)
6224f72b 2183{
6224f72b 2184 I32 oldscope;
14dd3ad8 2185 int ret = 0;
db36c5a1 2186 dJMPENV;
6224f72b 2187
9d4ba2ae
AL
2188 PERL_UNUSED_ARG(my_perl);
2189
3280af22 2190 oldscope = PL_scopestack_ix;
96e176bf
CL
2191#ifdef VMS
2192 VMSISH_HUSHED = 0;
2193#endif
6224f72b 2194
14dd3ad8 2195 JMPENV_PUSH(ret);
6224f72b
GS
2196 switch (ret) {
2197 case 1:
2198 cxstack_ix = -1; /* start context stack again */
312caa8e 2199 goto redo_body;
14dd3ad8 2200 case 0: /* normal completion */
14dd3ad8
GS
2201 redo_body:
2202 run_body(oldscope);
14dd3ad8
GS
2203 /* FALL THROUGH */
2204 case 2: /* my_exit() */
3280af22 2205 while (PL_scopestack_ix > oldscope)
6224f72b
GS
2206 LEAVE;
2207 FREETMPS;
3280af22 2208 PL_curstash = PL_defstash;
3a1ee7e8 2209 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
31d77e54
AB
2210 PL_endav && !PL_minus_c)
2211 call_list(oldscope, PL_endav);
6224f72b
GS
2212#ifdef MYMALLOC
2213 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2214 dump_mstats("after execution: ");
2215#endif
14dd3ad8
GS
2216 ret = STATUS_NATIVE_EXPORT;
2217 break;
6224f72b 2218 case 3:
312caa8e
CS
2219 if (PL_restartop) {
2220 POPSTACK_TO(PL_mainstack);
2221 goto redo_body;
6224f72b 2222 }
bf49b057 2223 PerlIO_printf(Perl_error_log, "panic: restartop\n");
312caa8e 2224 FREETMPS;
14dd3ad8
GS
2225 ret = 1;
2226 break;
6224f72b
GS
2227 }
2228
14dd3ad8
GS
2229 JMPENV_POP;
2230 return ret;
312caa8e
CS
2231}
2232
14dd3ad8 2233
dd374669 2234STATIC void
14dd3ad8
GS
2235S_run_body(pTHX_ I32 oldscope)
2236{
6224f72b 2237 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
3280af22 2238 PL_sawampersand ? "Enabling" : "Omitting"));
6224f72b 2239
3280af22 2240 if (!PL_restartop) {
6224f72b 2241 DEBUG_x(dump_all());
ecae49c0
NC
2242 if (!DEBUG_q_TEST)
2243 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
b900a521
JH
2244 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2245 PTR2UV(thr)));
6224f72b 2246
3280af22 2247 if (PL_minus_c) {
bf4acbe4 2248#ifdef MACOS_TRADITIONAL
e69a2255
JH
2249 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2250 (gMacPerl_ErrorFormat ? "# " : ""),
2251 MacPerl_MPWFileName(PL_origfilename));
bf4acbe4 2252#else
bf49b057 2253 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
bf4acbe4 2254#endif
6224f72b
GS
2255 my_exit(0);
2256 }
3280af22 2257 if (PERLDB_SINGLE && PL_DBsingle)
ac27b0f5 2258 sv_setiv(PL_DBsingle, 1);
3280af22
NIS
2259 if (PL_initav)
2260 call_list(oldscope, PL_initav);
6224f72b
GS
2261 }
2262
2263 /* do it */
2264
3280af22 2265 if (PL_restartop) {
533c011a 2266 PL_op = PL_restartop;
3280af22 2267 PL_restartop = 0;
cea2e8a9 2268 CALLRUNOPS(aTHX);
6224f72b 2269 }
3280af22
NIS
2270 else if (PL_main_start) {
2271 CvDEPTH(PL_main_cv) = 1;
533c011a 2272 PL_op = PL_main_start;
cea2e8a9 2273 CALLRUNOPS(aTHX);
6224f72b 2274 }
f6b3007c
JH
2275 my_exit(0);
2276 /* NOTREACHED */
6224f72b
GS
2277}
2278
954c1994 2279/*
ccfc67b7
JH
2280=head1 SV Manipulation Functions
2281
954c1994
GS
2282=for apidoc p||get_sv
2283
2284Returns the SV of the specified Perl scalar. If C<create> is set and the
2285Perl variable does not exist then it will be created. If C<create> is not
2286set and the variable does not exist then NULL is returned.
2287
2288=cut
2289*/
2290
6224f72b 2291SV*
864dbfa3 2292Perl_get_sv(pTHX_ const char *name, I32 create)
6224f72b
GS
2293{
2294 GV *gv;
4d1ff10f 2295#ifdef USE_5005THREADS
6224f72b
GS
2296 if (name[1] == '\0' && !isALPHA(name[0])) {
2297 PADOFFSET tmp = find_threadsv(name);
411caa50 2298 if (tmp != NOT_IN_PAD)
6224f72b 2299 return THREADSV(tmp);
6224f72b 2300 }
4d1ff10f 2301#endif /* USE_5005THREADS */
6224f72b
GS
2302 gv = gv_fetchpv(name, create, SVt_PV);
2303 if (gv)
2304 return GvSV(gv);
2305 return Nullsv;
2306}
2307
954c1994 2308/*
ccfc67b7
JH
2309=head1 Array Manipulation Functions
2310
954c1994
GS
2311=for apidoc p||get_av
2312
2313Returns the AV of the specified Perl array. If C<create> is set and the
2314Perl variable does not exist then it will be created. If C<create> is not
2315set and the variable does not exist then NULL is returned.
2316
2317=cut
2318*/
2319
6224f72b 2320AV*
864dbfa3 2321Perl_get_av(pTHX_ const char *name, I32 create)
6224f72b
GS
2322{
2323 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
2324 if (create)
2325 return GvAVn(gv);
2326 if (gv)
2327 return GvAV(gv);
2328 return Nullav;
2329}
2330
954c1994 2331/*
ccfc67b7
JH
2332=head1 Hash Manipulation Functions
2333
954c1994
GS
2334=for apidoc p||get_hv
2335
2336Returns the HV of the specified Perl hash. If C<create> is set and the
2337Perl variable does not exist then it will be created. If C<create> is not
2338set and the variable does not exist then NULL is returned.
2339
2340=cut
2341*/
2342
6224f72b 2343HV*
864dbfa3 2344Perl_get_hv(pTHX_ const char *name, I32 create)
6224f72b 2345{
890ce7af 2346 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
a0d0e21e
LW
2347 if (create)
2348 return GvHVn(gv);
2349 if (gv)
2350 return GvHV(gv);
2351 return Nullhv;
2352}
2353
954c1994 2354/*
ccfc67b7
JH
2355=head1 CV Manipulation Functions
2356
954c1994
GS
2357=for apidoc p||get_cv
2358
2359Returns the CV of the specified Perl subroutine. If C<create> is set and
2360the Perl subroutine does not exist then it will be declared (which has the
2361same effect as saying C<sub name;>). If C<create> is not set and the
2362subroutine does not exist then NULL is returned.
2363
2364=cut
2365*/
2366
a0d0e21e 2367CV*
864dbfa3 2368Perl_get_cv(pTHX_ const char *name, I32 create)
a0d0e21e
LW
2369{
2370 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
b099ddc0 2371 /* XXX unsafe for threads if eval_owner isn't held */
f6ec51f7
GS
2372 /* XXX this is probably not what they think they're getting.
2373 * It has the same effect as "sub name;", i.e. just a forward
2374 * declaration! */
8ebc5c01 2375 if (create && !GvCVu(gv))
774d564b 2376 return newSUB(start_subparse(FALSE, 0),
a0d0e21e 2377 newSVOP(OP_CONST, 0, newSVpv(name,0)),
4633a7c4 2378 Nullop,
a0d0e21e
LW
2379 Nullop);
2380 if (gv)
8ebc5c01 2381 return GvCVu(gv);
a0d0e21e
LW
2382 return Nullcv;
2383}
2384
79072805
LW
2385/* Be sure to refetch the stack pointer after calling these routines. */
2386
954c1994 2387/*
ccfc67b7
JH
2388
2389=head1 Callback Functions
2390
954c1994
GS
2391=for apidoc p||call_argv
2392
2393Performs a callback to the specified Perl sub. See L<perlcall>.
2394
2395=cut
2396*/
2397
a0d0e21e 2398I32
8f42b153 2399Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
ac27b0f5 2400
8ac85365
NIS
2401 /* See G_* flags in cop.h */
2402 /* null terminated arg list */
8990e307 2403{
a0d0e21e 2404 dSP;
8990e307 2405
924508f0 2406 PUSHMARK(SP);
a0d0e21e 2407 if (argv) {
8990e307 2408 while (*argv) {
a0d0e21e 2409 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
8990e307
LW
2410 argv++;
2411 }
a0d0e21e 2412 PUTBACK;
8990e307 2413 }
864dbfa3 2414 return call_pv(sub_name, flags);
8990e307
LW
2415}
2416
954c1994
GS
2417/*
2418=for apidoc p||call_pv
2419
2420Performs a callback to the specified Perl sub. See L<perlcall>.
2421
2422=cut
2423*/
2424
a0d0e21e 2425I32
864dbfa3 2426Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
8ac85365
NIS
2427 /* name of the subroutine */
2428 /* See G_* flags in cop.h */
a0d0e21e 2429{
864dbfa3 2430 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
a0d0e21e
LW
2431}
2432
954c1994
GS
2433/*
2434=for apidoc p||call_method
2435
2436Performs a callback to the specified Perl method. The blessed object must
2437be on the stack. See L<perlcall>.
2438
2439=cut
2440*/
2441
a0d0e21e 2442I32
864dbfa3 2443Perl_call_method(pTHX_ const char *methname, I32 flags)
8ac85365
NIS
2444 /* name of the subroutine */
2445 /* See G_* flags in cop.h */
a0d0e21e 2446{
968b3946 2447 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
a0d0e21e
LW
2448}
2449
2450/* May be called with any of a CV, a GV, or an SV containing the name. */
954c1994
GS
2451/*
2452=for apidoc p||call_sv
2453
2454Performs a callback to the Perl sub whose name is in the SV. See
2455L<perlcall>.
2456
2457=cut
2458*/
2459
a0d0e21e 2460I32
864dbfa3 2461Perl_call_sv(pTHX_ SV *sv, I32 flags)
8ac85365 2462 /* See G_* flags in cop.h */
a0d0e21e 2463{
27da23d5 2464 dVAR; dSP;
a0d0e21e 2465 LOGOP myop; /* fake syntax tree node */
968b3946 2466 UNOP method_op;
aa689395 2467 I32 oldmark;
13689cfe 2468 volatile I32 retval = 0;
a0d0e21e 2469 I32 oldscope;
54310121 2470 bool oldcatch = CATCH_GET;
6224f72b 2471 int ret;
533c011a 2472 OP* oldop = PL_op;
db36c5a1 2473 dJMPENV;
1e422769 2474
a0d0e21e
LW
2475 if (flags & G_DISCARD) {
2476 ENTER;
2477 SAVETMPS;
2478 }
2479
aa689395 2480 Zero(&myop, 1, LOGOP);
54310121 2481 myop.op_next = Nullop;
f51d4af5 2482 if (!(flags & G_NOARGS))
aa689395 2483 myop.op_flags |= OPf_STACKED;
54310121 2484 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2485 (flags & G_ARRAY) ? OPf_WANT_LIST :
2486 OPf_WANT_SCALAR);
462e5cf6 2487 SAVEOP();
533c011a 2488 PL_op = (OP*)&myop;
aa689395 2489
3280af22
NIS
2490 EXTEND(PL_stack_sp, 1);
2491 *++PL_stack_sp = sv;
aa689395 2492 oldmark = TOPMARK;
3280af22 2493 oldscope = PL_scopestack_ix;
a0d0e21e 2494
3280af22 2495 if (PERLDB_SUB && PL_curstash != PL_debstash
36477c24 2496 /* Handle first BEGIN of -d. */
3280af22 2497 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
36477c24 2498 /* Try harder, since this may have been a sighandler, thus
2499 * curstash may be meaningless. */
3280af22 2500 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
491527d0 2501 && !(flags & G_NODEBUG))
533c011a 2502 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 2503
968b3946
GS
2504 if (flags & G_METHOD) {
2505 Zero(&method_op, 1, UNOP);
2506 method_op.op_next = PL_op;
2507 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2508 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
f39d0b86 2509 PL_op = (OP*)&method_op;
968b3946
GS
2510 }
2511
312caa8e 2512 if (!(flags & G_EVAL)) {
0cdb2077 2513 CATCH_SET(TRUE);
14dd3ad8 2514 call_body((OP*)&myop, FALSE);
312caa8e 2515 retval = PL_stack_sp - (PL_stack_base + oldmark);
0253cb41 2516 CATCH_SET(oldcatch);
312caa8e
CS
2517 }
2518 else {
d78bda3d 2519 myop.op_other = (OP*)&myop;
3280af22 2520 PL_markstack_ptr--;
4633a7c4
LW
2521 /* we're trying to emulate pp_entertry() here */
2522 {
c09156bb 2523 register PERL_CONTEXT *cx;
f54cb97a 2524 const I32 gimme = GIMME_V;
ac27b0f5 2525
4633a7c4
LW
2526 ENTER;
2527 SAVETMPS;
ac27b0f5 2528
1d76a5c3 2529 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
4633a7c4 2530 PUSHEVAL(cx, 0, 0);
533c011a 2531 PL_eval_root = PL_op; /* Only needed so that goto works right. */
ac27b0f5 2532
faef0170 2533 PL_in_eval = EVAL_INEVAL;
4633a7c4 2534 if (flags & G_KEEPERR)
faef0170 2535 PL_in_eval |= EVAL_KEEPERR;
4633a7c4 2536 else
c69006e4 2537 sv_setpvn(ERRSV,"",0);
4633a7c4 2538 }
3280af22 2539 PL_markstack_ptr++;
a0d0e21e 2540
14dd3ad8 2541 JMPENV_PUSH(ret);
6224f72b
GS
2542 switch (ret) {
2543 case 0:
14dd3ad8
GS
2544 redo_body:
2545 call_body((OP*)&myop, FALSE);
312caa8e
CS
2546 retval = PL_stack_sp - (PL_stack_base + oldmark);
2547 if (!(flags & G_KEEPERR))
c69006e4 2548 sv_setpvn(ERRSV,"",0);
a0d0e21e 2549 break;
6224f72b 2550 case 1:
f86702cc 2551 STATUS_ALL_FAILURE;
a0d0e21e 2552 /* FALL THROUGH */
6224f72b 2553 case 2:
a0d0e21e 2554 /* my_exit() was called */
3280af22 2555 PL_curstash = PL_defstash;
a0d0e21e 2556 FREETMPS;
14dd3ad8 2557 JMPENV_POP;
cc3604b1 2558 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2559 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2560 my_exit_jump();
a0d0e21e 2561 /* NOTREACHED */
6224f72b 2562 case 3:
3280af22 2563 if (PL_restartop) {
533c011a 2564 PL_op = PL_restartop;
3280af22 2565 PL_restartop = 0;
312caa8e 2566 goto redo_body;
a0d0e21e 2567 }
3280af22 2568 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2569 if (flags & G_ARRAY)
2570 retval = 0;
2571 else {
2572 retval = 1;
3280af22 2573 *++PL_stack_sp = &PL_sv_undef;
a0d0e21e 2574 }
312caa8e 2575 break;
a0d0e21e 2576 }
a0d0e21e 2577
3280af22 2578 if (PL_scopestack_ix > oldscope) {
a0a2876f
LW
2579 SV **newsp;
2580 PMOP *newpm;
2581 I32 gimme;
c09156bb 2582 register PERL_CONTEXT *cx;
a0a2876f
LW
2583 I32 optype;
2584
2585 POPBLOCK(cx,newpm);
2586 POPEVAL(cx);
3280af22 2587 PL_curpm = newpm;
a0a2876f 2588 LEAVE;
9d4ba2ae
AL
2589 PERL_UNUSED_VAR(newsp);
2590 PERL_UNUSED_VAR(gimme);
2591 PERL_UNUSED_VAR(optype);
a0d0e21e 2592 }
14dd3ad8 2593 JMPENV_POP;
a0d0e21e 2594 }
1e422769 2595
a0d0e21e 2596 if (flags & G_DISCARD) {
3280af22 2597 PL_stack_sp = PL_stack_base + oldmark;
a0d0e21e
LW
2598 retval = 0;
2599 FREETMPS;
2600 LEAVE;
2601 }
533c011a 2602 PL_op = oldop;
a0d0e21e
LW
2603 return retval;
2604}
2605
312caa8e 2606STATIC void
dd374669 2607S_call_body(pTHX_ const OP *myop, bool is_eval)
312caa8e 2608{
312caa8e
CS
2609 if (PL_op == myop) {
2610 if (is_eval)
f807eda9 2611 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
312caa8e 2612 else
f807eda9 2613 PL_op = Perl_pp_entersub(aTHX); /* this does */
312caa8e
CS
2614 }
2615 if (PL_op)
cea2e8a9 2616 CALLRUNOPS(aTHX);
312caa8e
CS
2617}
2618
6e72f9df 2619/* Eval a string. The G_EVAL flag is always assumed. */
8990e307 2620
954c1994
GS
2621/*
2622=for apidoc p||eval_sv
2623
2624Tells Perl to C<eval> the string in the SV.
2625
2626=cut
2627*/
2628
a0d0e21e 2629I32
864dbfa3 2630Perl_eval_sv(pTHX_ SV *sv, I32 flags)
ac27b0f5 2631
8ac85365 2632 /* See G_* flags in cop.h */
a0d0e21e 2633{
924508f0 2634 dSP;
a0d0e21e 2635 UNOP myop; /* fake syntax tree node */
8fa7f367 2636 volatile I32 oldmark = SP - PL_stack_base;
13689cfe 2637 volatile I32 retval = 0;
6224f72b 2638 int ret;
533c011a 2639 OP* oldop = PL_op;
db36c5a1 2640 dJMPENV;
84902520 2641
4633a7c4
LW
2642 if (flags & G_DISCARD) {
2643 ENTER;
2644 SAVETMPS;
2645 }
2646
462e5cf6 2647 SAVEOP();
533c011a
NIS
2648 PL_op = (OP*)&myop;
2649 Zero(PL_op, 1, UNOP);
3280af22
NIS
2650 EXTEND(PL_stack_sp, 1);
2651 *++PL_stack_sp = sv;
79072805 2652
4633a7c4
LW
2653 if (!(flags & G_NOARGS))
2654 myop.op_flags = OPf_STACKED;
79072805 2655 myop.op_next = Nullop;
6e72f9df 2656 myop.op_type = OP_ENTEREVAL;
54310121 2657 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2658 (flags & G_ARRAY) ? OPf_WANT_LIST :
2659 OPf_WANT_SCALAR);
6e72f9df 2660 if (flags & G_KEEPERR)
2661 myop.op_flags |= OPf_SPECIAL;
4633a7c4 2662
dedbcade
DM
2663 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2664 * before a PUSHEVAL, which corrupts the stack after a croak */
2665 TAINT_PROPER("eval_sv()");
2666
14dd3ad8 2667 JMPENV_PUSH(ret);
6224f72b
GS
2668 switch (ret) {
2669 case 0:
14dd3ad8
GS
2670 redo_body:
2671 call_body((OP*)&myop,TRUE);
312caa8e
CS
2672 retval = PL_stack_sp - (PL_stack_base + oldmark);
2673 if (!(flags & G_KEEPERR))
c69006e4 2674 sv_setpvn(ERRSV,"",0);
4633a7c4 2675 break;
6224f72b 2676 case 1:
f86702cc 2677 STATUS_ALL_FAILURE;
4633a7c4 2678 /* FALL THROUGH */
6224f72b 2679 case 2:
4633a7c4 2680 /* my_exit() was called */
3280af22 2681 PL_curstash = PL_defstash;
4633a7c4 2682 FREETMPS;
14dd3ad8 2683 JMPENV_POP;
cc3604b1 2684 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
cea2e8a9 2685 Perl_croak(aTHX_ "Callback called exit");
f86702cc 2686 my_exit_jump();
4633a7c4 2687 /* NOTREACHED */
6224f72b 2688 case 3:
3280af22 2689 if (PL_restartop) {
533c011a 2690 PL_op = PL_restartop;
3280af22 2691 PL_restartop = 0;
312caa8e 2692 goto redo_body;
4633a7c4 2693 }
3280af22 2694 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2695 if (flags & G_ARRAY)
2696 retval = 0;
2697 else {
2698 retval = 1;
3280af22 2699 *++PL_stack_sp = &PL_sv_undef;
4633a7c4 2700 }
312caa8e 2701 break;
4633a7c4
LW
2702 }
2703
14dd3ad8 2704 JMPENV_POP;
4633a7c4 2705 if (flags & G_DISCARD) {
3280af22 2706 PL_stack_sp = PL_stack_base + oldmark;
4633a7c4
LW
2707 retval = 0;
2708 FREETMPS;
2709 LEAVE;
2710 }
533c011a 2711 PL_op = oldop;
4633a7c4
LW
2712 return retval;
2713}
2714
954c1994
GS
2715/*
2716=for apidoc p||eval_pv
2717
2718Tells Perl to C<eval> the given string and return an SV* result.
2719
2720=cut
2721*/
2722
137443ea 2723SV*
864dbfa3 2724Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
137443ea 2725{
2726 dSP;
2727 SV* sv = newSVpv(p, 0);
2728
864dbfa3 2729 eval_sv(sv, G_SCALAR);
137443ea 2730 SvREFCNT_dec(sv);
2731
2732 SPAGAIN;
2733 sv = POPs;
2734 PUTBACK;
2735
2d8e6c8d 2736 if (croak_on_error && SvTRUE(ERRSV)) {
0510663f 2737 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2d8e6c8d 2738 }
137443ea 2739
2740 return sv;
2741}
2742
4633a7c4
LW
2743/* Require a module. */
2744
954c1994 2745/*
ccfc67b7
JH
2746=head1 Embedding Functions
2747
954c1994
GS
2748=for apidoc p||require_pv
2749
7d3fb230
BS
2750Tells Perl to C<require> the file named by the string argument. It is
2751analogous to the Perl code C<eval "require '$file'">. It's even
2307c6d0 2752implemented that way; consider using load_module instead.
954c1994 2753
7d3fb230 2754=cut */
954c1994 2755
4633a7c4 2756void
864dbfa3 2757Perl_require_pv(pTHX_ const char *pv)
4633a7c4 2758{
d3acc0f7
JP
2759 SV* sv;
2760 dSP;
e788e7d3 2761 PUSHSTACKi(PERLSI_REQUIRE);
d3acc0f7 2762 PUTBACK;
be41e5d9
NC
2763 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2764 eval_sv(sv_2mortal(sv), G_DISCARD);
d3acc0f7
JP
2765 SPAGAIN;
2766 POPSTACK;
79072805
LW
2767}
2768
79072805 2769void
e1ec3a88 2770Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
79072805
LW
2771{
2772 register GV *gv;
2773
155aba94 2774 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
14befaf4 2775 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
79072805
LW
2776}
2777
76e3520e 2778STATIC void
e1ec3a88 2779S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
4633a7c4 2780{
ab821d7f 2781 /* This message really ought to be max 23 lines.
75c72d73 2782 * Removed -h because the user already knows that option. Others? */
fb73857a 2783
27da23d5 2784 static const char * const usage_msg[] = {
aefc56c5
SF
2785"-0[octal] specify record separator (\\0, if no argument)",
2786"-A[mod][=pattern] activate all/given assertions",
2787"-a autosplit mode with -n or -p (splits $_ into @F)",
2788"-C[number/list] enables the listed Unicode features",
2789"-c check syntax only (runs BEGIN and CHECK blocks)",
2790"-d[:debugger] run program under debugger",
2791"-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2792"-e program one line of program (several -e's allowed, omit programfile)",
aefc56c5 2793"-f don't do $sitelib/sitecustomize.pl at startup",
aefc56c5
SF
2794"-F/pattern/ split() pattern for -a switch (//'s are optional)",
2795"-i[extension] edit <> files in place (makes backup if extension supplied)",
2796"-Idirectory specify @INC/#include directory (several -I's allowed)",
2797"-l[octal] enable line ending processing, specifies line terminator",
2798"-[mM][-]module execute \"use/no module...\" before executing program",
2799"-n assume \"while (<>) { ... }\" loop around program",
2800"-p assume loop like -n but print line also, like sed",
2801"-P run program through C preprocessor before compilation",
2802"-s enable rudimentary parsing for switches after programfile",
2803"-S look for programfile using PATH environment variable",
2804"-t enable tainting warnings",
2805"-T enable tainting checks",
2806"-u dump core after parsing program",
2807"-U allow unsafe operations",
2808"-v print version, subversion (includes VERY IMPORTANT perl info)",
2809"-V[:variable] print configuration summary (or a single Config.pm variable)",
2810"-w enable many useful warnings (RECOMMENDED)",
2811"-W enable all warnings",
2812"-x[directory] strip off text before #!perl line and perhaps cd to directory",
2813"-X disable all warnings",
fb73857a 2814"\n",
2815NULL
2816};
27da23d5 2817 const char * const *p = usage_msg;
fb73857a 2818
b0e47665
GS
2819 PerlIO_printf(PerlIO_stdout(),
2820 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2821 name);
fb73857a 2822 while (*p)
b0e47665 2823 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
4633a7c4
LW
2824}
2825
b4ab917c
DM
2826/* convert a string of -D options (or digits) into an int.
2827 * sets *s to point to the char after the options */
2828
2829#ifdef DEBUGGING
2830int
e1ec3a88 2831Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
b4ab917c 2832{
27da23d5 2833 static const char * const usage_msgd[] = {
e6e64d9b
JC
2834 " Debugging flag values: (see also -d)",
2835 " p Tokenizing and parsing (with v, displays parse stack)",
3679267a 2836 " s Stack snapshots (with v, displays all stacks)",
e6e64d9b
JC
2837 " l Context (loop) stack processing",
2838 " t Trace execution",
2839 " o Method and overloading resolution",
2840 " c String/numeric conversions",
2841 " P Print profiling info, preprocessor command for -P, source file input state",
2842 " m Memory allocation",
2843 " f Format processing",
2844 " r Regular expression parsing and execution",
2845 " x Syntax tree dump",
3679267a 2846 " u Tainting checks",
e6e64d9b
JC
2847 " H Hash dump -- usurps values()",
2848 " X Scratchpad allocation",
2849 " D Cleaning up",
2850 " S Thread synchronization",
2851 " T Tokenising",
2852 " R Include reference counts of dumped variables (eg when using -Ds)",
2853 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2854 " v Verbose: use in conjunction with other flags",
2855 " C Copy On Write",
2856 " A Consistency checks on internal structures",
3679267a 2857 " q quiet - currently only suppresses the 'EXECUTING' message",
e6e64d9b
JC
2858 NULL
2859 };
b4ab917c
DM
2860 int i = 0;
2861 if (isALPHA(**s)) {
2862 /* if adding extra options, remember to update DEBUG_MASK */
bfed75c6 2863 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
b4ab917c
DM
2864
2865 for (; isALNUM(**s); (*s)++) {
e1ec3a88 2866 const char *d = strchr(debopts,**s);
b4ab917c
DM
2867 if (d)
2868 i |= 1 << (d - debopts);
2869 else if (ckWARN_d(WARN_DEBUGGING))
e6e64d9b
JC
2870 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2871 "invalid option -D%c, use -D'' to see choices\n", **s);
b4ab917c
DM
2872 }
2873 }
e6e64d9b 2874 else if (isDIGIT(**s)) {
b4ab917c
DM
2875 i = atoi(*s);
2876 for (; isALNUM(**s); (*s)++) ;
2877 }
ddcf8bc1 2878 else if (givehelp) {
aadb217d 2879 char **p = (char **)usage_msgd;
e6e64d9b
JC
2880 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2881 }
b4ab917c
DM
2882# ifdef EBCDIC
2883 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2884 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2885 "-Dp not implemented on this platform\n");
2886# endif
2887 return i;
2888}
2889#endif
2890
79072805
LW
2891/* This routine handles any switches that can be given during run */
2892
2893char *
864dbfa3 2894Perl_moreswitches(pTHX_ char *s)
79072805 2895{
27da23d5 2896 dVAR;
84c133a0 2897 UV rschar;
79072805
LW
2898
2899 switch (*s) {
2900 case '0':
a863c7d1 2901 {
f2095865 2902 I32 flags = 0;
a3b680e6 2903 STRLEN numlen;
f2095865
JH
2904
2905 SvREFCNT_dec(PL_rs);
2906 if (s[1] == 'x' && s[2]) {
a3b680e6 2907 const char *e = s+=2;
f2095865
JH
2908 U8 *tmps;
2909
a3b680e6
AL
2910 while (*e)
2911 e++;
f2095865
JH
2912 numlen = e - s;
2913 flags = PERL_SCAN_SILENT_ILLDIGIT;
2914 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2915 if (s + numlen < e) {
2916 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2917 numlen = 0;
2918 s--;
2919 }
2920 PL_rs = newSVpvn("", 0);
c5661c80 2921 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
f2095865
JH
2922 tmps = (U8*)SvPVX(PL_rs);
2923 uvchr_to_utf8(tmps, rschar);
2924 SvCUR_set(PL_rs, UNISKIP(rschar));
2925 SvUTF8_on(PL_rs);
2926 }
2927 else {
2928 numlen = 4;
2929 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2930 if (rschar & ~((U8)~0))
2931 PL_rs = &PL_sv_undef;
2932 else if (!rschar && numlen >= 2)
2933 PL_rs = newSVpvn("", 0);
2934 else {
2935 char ch = (char)rschar;
2936 PL_rs = newSVpvn(&ch, 1);
2937 }
2938 }
800633c3 2939 sv_setsv(get_sv("/", TRUE), PL_rs);
f2095865 2940 return s + numlen;
a863c7d1 2941 }
46487f74 2942 case 'C':
a05d7ebb 2943 s++;
dd374669 2944 PL_unicode = parse_unicode_opts( (const char **)&s );
46487f74 2945 return s;
2304df62 2946 case 'F':
3280af22 2947 PL_minus_F = TRUE;
ebce5377
RGS
2948 PL_splitstr = ++s;
2949 while (*s && !isSPACE(*s)) ++s;
2950 *s = '\0';
2951 PL_splitstr = savepv(PL_splitstr);
2304df62 2952 return s;
79072805 2953 case 'a':
3280af22 2954 PL_minus_a = TRUE;
79072805
LW
2955 s++;
2956 return s;
2957 case 'c':
3280af22 2958 PL_minus_c = TRUE;
79072805
LW
2959 s++;
2960 return s;
2961 case 'd':
bbce6d69 2962 forbid_setid("-d");
4633a7c4 2963 s++;
2cbb2ee1
RGS
2964
2965 /* -dt indicates to the debugger that threads will be used */
2966 if (*s == 't' && !isALNUM(s[1])) {
2967 ++s;
2968 my_setenv("PERL5DB_THREADED", "1");
2969 }
2970
70c94a19
RR
2971 /* The following permits -d:Mod to accepts arguments following an =
2972 in the fashion that -MSome::Mod does. */
2973 if (*s == ':' || *s == '=') {
06b5626a 2974 const char *start;
70c94a19
RR
2975 SV *sv;
2976 sv = newSVpv("use Devel::", 0);
2977 start = ++s;
2978 /* We now allow -d:Module=Foo,Bar */
2979 while(isALNUM(*s) || *s==':') ++s;
2980 if (*s != '=')
2981 sv_catpv(sv, start);
2982 else {
2983 sv_catpvn(sv, start, s-start);
0c5a913d 2984 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
70c94a19 2985 }
4633a7c4 2986 s += strlen(s);
184f32ec 2987 my_setenv("PERL5DB", SvPV_nolen_const(sv));
4633a7c4 2988 }
ed094faf 2989 if (!PL_perldb) {
3280af22 2990 PL_perldb = PERLDB_ALL;
a0d0e21e 2991 init_debugger();
ed094faf 2992 }
79072805
LW
2993 return s;
2994 case 'D':
0453d815 2995 {
79072805 2996#ifdef DEBUGGING
bbce6d69 2997 forbid_setid("-D");
b4ab917c 2998 s++;
dd374669 2999 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
12a43e32 3000#else /* !DEBUGGING */
0453d815 3001 if (ckWARN_d(WARN_DEBUGGING))
9014280d 3002 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
e6e64d9b 3003 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
a0d0e21e 3004 for (s++; isALNUM(*s); s++) ;
79072805 3005#endif
79072805 3006 return s;
0453d815 3007 }
4633a7c4 3008 case 'h':
ac27b0f5 3009 usage(PL_origargv[0]);
7ca617d0 3010 my_exit(0);
79072805 3011 case 'i':
43c5f42d 3012 Safefree(PL_inplace);
c030f24b
GH
3013#if defined(__CYGWIN__) /* do backup extension automagically */
3014 if (*(s+1) == '\0') {
3015 PL_inplace = savepv(".bak");
3016 return s+1;
3017 }
3018#endif /* __CYGWIN__ */
3280af22 3019 PL_inplace = savepv(s+1);
a6e20a40
AL
3020 for (s = PL_inplace; *s && !isSPACE(*s); s++)
3021 ;
7b8d334a 3022 if (*s) {
fb73857a 3023 *s++ = '\0';
7b8d334a
GS
3024 if (*s == '-') /* Additional switches on #! line. */
3025 s++;
3026 }
fb73857a 3027 return s;
4e49a025 3028 case 'I': /* -I handled both here and in parse_body() */
bbce6d69 3029 forbid_setid("-I");
fb73857a 3030 ++s;
3031 while (*s && isSPACE(*s))
3032 ++s;
3033 if (*s) {
774d564b 3034 char *e, *p;
0df16ed7
GS
3035 p = s;
3036 /* ignore trailing spaces (possibly followed by other switches) */
3037 do {
3038 for (e = p; *e && !isSPACE(*e); e++) ;
3039 p = e;
3040 while (isSPACE(*p))
3041 p++;
3042 } while (*p && *p != '-');
3043 e = savepvn(s, e-s);
88fe16b2 3044 incpush(e, TRUE, TRUE, FALSE, FALSE);
0df16ed7
GS
3045 Safefree(e);
3046 s = p;
3047 if (*s == '-')
3048 s++;
79072805
LW
3049 }
3050 else
a67e862a 3051 Perl_croak(aTHX_ "No directory specified for -I");
fb73857a 3052 return s;
79072805 3053 case 'l':
3280af22 3054 PL_minus_l = TRUE;
79072805 3055 s++;
7889fe52
NIS
3056 if (PL_ors_sv) {
3057 SvREFCNT_dec(PL_ors_sv);
3058 PL_ors_sv = Nullsv;
3059 }
79072805 3060 if (isDIGIT(*s)) {
53305cf1 3061 I32 flags = 0;
a3b680e6 3062 STRLEN numlen;
7889fe52 3063 PL_ors_sv = newSVpvn("\n",1);
53305cf1
NC
3064 numlen = 3 + (*s == '0');
3065 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
79072805
LW
3066 s += numlen;
3067 }
3068 else {
8bfdd7d9 3069 if (RsPARA(PL_rs)) {
7889fe52
NIS
3070 PL_ors_sv = newSVpvn("\n\n",2);
3071 }
3072 else {
8bfdd7d9 3073 PL_ors_sv = newSVsv(PL_rs);
c07a80fd 3074 }
79072805
LW
3075 }
3076 return s;
06492da6
SF
3077 case 'A':
3078 forbid_setid("-A");
930366bd
RGS
3079 if (!PL_preambleav)
3080 PL_preambleav = newAV();
aefc56c5
SF
3081 s++;
3082 {
3083 char *start = s;
3084 SV *sv = newSVpv("use assertions::activate", 24);
3085 while(isALNUM(*s) || *s == ':') ++s;
3086 if (s != start) {
3087 sv_catpvn(sv, "::", 2);
3088 sv_catpvn(sv, start, s-start);
3089 }
3090 if (*s == '=') {
0c5a913d 3091 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
aefc56c5
SF
3092 s+=strlen(s);
3093 }
3094 else if (*s != '\0') {
3095 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, s-start, start);
3096 }
06492da6 3097 av_push(PL_preambleav, sv);
aefc56c5 3098 return s;
06492da6 3099 }
1a30305b 3100 case 'M':
bbce6d69 3101 forbid_setid("-M"); /* XXX ? */
1a30305b 3102 /* FALL THROUGH */
3103 case 'm':
bbce6d69 3104 forbid_setid("-m"); /* XXX ? */
1a30305b 3105 if (*++s) {
a5f75d66 3106 char *start;
11343788 3107 SV *sv;
e1ec3a88 3108 const char *use = "use ";
a5f75d66 3109 /* -M-foo == 'no foo' */
d0043bd1
NC
3110 /* Leading space on " no " is deliberate, to make both
3111 possibilities the same length. */
3112 if (*s == '-') { use = " no "; ++s; }
3113 sv = newSVpvn(use,4);
a5f75d66 3114 start = s;
1a30305b 3115 /* We allow -M'Module qw(Foo Bar)' */
c07a80fd 3116 while(isALNUM(*s) || *s==':') ++s;
3117 if (*s != '=') {
11343788 3118 sv_catpv(sv, start);
c07a80fd 3119 if (*(start-1) == 'm') {
3120 if (*s != '\0')
cea2e8a9 3121 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
11343788 3122 sv_catpv( sv, " ()");
c07a80fd 3123 }
3124 } else {
6df41af2 3125 if (s == start)
be98fb35
GS
3126 Perl_croak(aTHX_ "Module name required with -%c option",
3127 s[-1]);
11343788 3128 sv_catpvn(sv, start, s-start);
3d27e215
LM
3129 sv_catpv(sv, " split(/,/,q");
3130 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
11343788 3131 sv_catpv(sv, ++s);
3d27e215 3132 sv_catpvn(sv, "\0)", 2);
c07a80fd 3133 }
1a30305b 3134 s += strlen(s);
5c831c24 3135 if (!PL_preambleav)
3280af22
NIS
3136 PL_preambleav = newAV();
3137 av_push(PL_preambleav, sv);
1a30305b 3138 }
3139 else
9e81e6a1 3140 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
1a30305b 3141 return s;
79072805 3142 case 'n':
3280af22 3143 PL_minus_n = TRUE;
79072805
LW
3144 s++;
3145 return s;
3146 case 'p':
3280af22 3147 PL_minus_p = TRUE;
79072805
LW
3148 s++;
3149 return s;
3150 case 's':
bbce6d69 3151 forbid_setid("-s");
3280af22 3152 PL_doswitches = TRUE;
79072805
LW
3153 s++;
3154 return s;
6537fe72
MS
3155 case 't':
3156 if (!PL_tainting)
22f7c9c9 3157 TOO_LATE_FOR('t');
6537fe72
MS
3158 s++;
3159 return s;
463ee0b2 3160 case 'T':
3280af22 3161 if (!PL_tainting)
22f7c9c9 3162 TOO_LATE_FOR('T');
463ee0b2
LW
3163 s++;
3164 return s;
79072805 3165 case 'u':
bf4acbe4
GS
3166#ifdef MACOS_TRADITIONAL
3167 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3168#endif
3280af22 3169 PL_do_undump = TRUE;
79072805
LW
3170 s++;
3171 return s;
3172 case 'U':
3280af22 3173 PL_unsafe = TRUE;
79072805
LW
3174 s++;
3175 return s;
3176 case 'v':
d7aa5382
JP
3177 if (!sv_derived_from(PL_patchlevel, "version"))
3178 (void *)upg_version(PL_patchlevel);
8e9464f1 3179#if !defined(DGUX)
b0e47665 3180 PerlIO_printf(PerlIO_stdout(),
52ea0aec 3181 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
d7aa5382
JP
3182 vstringify(PL_patchlevel),
3183 ARCHNAME));
8e9464f1
JH
3184#else /* DGUX */
3185/* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3186 PerlIO_printf(PerlIO_stdout(),
52ea0aec 3187 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
d7aa5382 3188 vstringify(PL_patchlevel)));
8e9464f1
JH
3189 PerlIO_printf(PerlIO_stdout(),
3190 Perl_form(aTHX_ " built under %s at %s %s\n",
3191 OSNAME, __DATE__, __TIME__));
3192 PerlIO_printf(PerlIO_stdout(),
3193 Perl_form(aTHX_ " OS Specific Release: %s\n",
40a39f85 3194 OSVERS));
8e9464f1
JH
3195#endif /* !DGUX */
3196
fb73857a 3197#if defined(LOCAL_PATCH_COUNT)
3198 if (LOCAL_PATCH_COUNT > 0)
b0e47665
GS
3199 PerlIO_printf(PerlIO_stdout(),
3200 "\n(with %d registered patch%s, "
3201 "see perl -V for more detail)",
3202 (int)LOCAL_PATCH_COUNT,
3203 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
a5f75d66 3204#endif
1a30305b 3205
b0e47665 3206 PerlIO_printf(PerlIO_stdout(),
359b00fe 3207 "\n\nCopyright 1987-2005, Larry Wall\n");
eae9c151
JH
3208#ifdef MACOS_TRADITIONAL
3209 PerlIO_printf(PerlIO_stdout(),
be3c0a43 3210 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
03765510 3211 "maintained by Chris Nandor\n");
eae9c151 3212#endif
79072805 3213#ifdef MSDOS
b0e47665
GS
3214 PerlIO_printf(PerlIO_stdout(),
3215 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
55497cff 3216#endif
3217#ifdef DJGPP
b0e47665
GS
3218 PerlIO_printf(PerlIO_stdout(),
3219 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3220 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
4633a7c4 3221#endif
79072805 3222#ifdef OS2
b0e47665
GS
3223 PerlIO_printf(PerlIO_stdout(),
3224 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
be3c0a43 3225 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
79072805 3226#endif
79072805 3227#ifdef atarist
b0e47665
GS
3228 PerlIO_printf(PerlIO_stdout(),
3229 "atariST series port, ++jrb bammi@cadence.com\n");
79072805 3230#endif
a3f9223b 3231#ifdef __BEOS__
b0e47665
GS
3232 PerlIO_printf(PerlIO_stdout(),
3233 "BeOS port Copyright Tom Spindler, 1997-1999\n");
a3f9223b 3234#endif
1d84e8df 3235#ifdef MPE
b0e47665 3236 PerlIO_printf(PerlIO_stdout(),
e583a879 3237 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
1d84e8df 3238#endif
9d116dd7 3239#ifdef OEMVS
b0e47665
GS
3240 PerlIO_printf(PerlIO_stdout(),
3241 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
9d116dd7 3242#endif
495c5fdc 3243#ifdef __VOS__
b0e47665 3244 PerlIO_printf(PerlIO_stdout(),
94efb9fb 3245 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
495c5fdc 3246#endif
092bebab 3247#ifdef __OPEN_VM
b0e47665
GS
3248 PerlIO_printf(PerlIO_stdout(),
3249 "VM/ESA port by Neale Ferguson, 1998-1999\n");
092bebab 3250#endif
a1a0e61e 3251#ifdef POSIX_BC
b0e47665
GS
3252 PerlIO_printf(PerlIO_stdout(),
3253 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
a1a0e61e 3254#endif
61ae2fbf 3255#ifdef __MINT__
b0e47665
GS
3256 PerlIO_printf(PerlIO_stdout(),
3257 "MiNT port by Guido Flohr, 1997-1999\n");
61ae2fbf 3258#endif
f83d2536 3259#ifdef EPOC
b0e47665 3260 PerlIO_printf(PerlIO_stdout(),
be3c0a43 3261 "EPOC port by Olaf Flebbe, 1999-2002\n");
f83d2536 3262#endif
e1caacb4 3263#ifdef UNDER_CE
b475b3e6
JH
3264 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3265 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
e1caacb4
JH
3266 wce_hitreturn();
3267#endif
27da23d5
JH
3268#ifdef SYMBIAN
3269 PerlIO_printf(PerlIO_stdout(),
3270 "Symbian port by Nokia, 2004-2005\n");
3271#endif
baed7233
DL
3272#ifdef BINARY_BUILD_NOTICE
3273 BINARY_BUILD_NOTICE;
3274#endif
b0e47665
GS
3275 PerlIO_printf(PerlIO_stdout(),
3276 "\n\
79072805 3277Perl may be copied only under the terms of either the Artistic License or the\n\
3d6f292d 3278GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
95103687 3279Complete documentation for Perl, including FAQ lists, should be found on\n\
a0288114 3280this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
c9e30dd8 3281Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
7ca617d0 3282 my_exit(0);
79072805 3283 case 'w':
599cee73 3284 if (! (PL_dowarn & G_WARN_ALL_MASK))
ac27b0f5 3285 PL_dowarn |= G_WARN_ON;
599cee73
PM
3286 s++;
3287 return s;
3288 case 'W':
ac27b0f5 3289 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
317ea90d
MS
3290 if (!specialWARN(PL_compiling.cop_warnings))
3291 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 3292 PL_compiling.cop_warnings = pWARN_ALL ;
599cee73
PM
3293 s++;
3294 return s;
3295 case 'X':
ac27b0f5 3296 PL_dowarn = G_WARN_ALL_OFF;
317ea90d
MS
3297 if (!specialWARN(PL_compiling.cop_warnings))
3298 SvREFCNT_dec(PL_compiling.cop_warnings);
d3a7d8c7 3299 PL_compiling.cop_warnings = pWARN_NONE ;
79072805
LW
3300 s++;
3301 return s;
a0d0e21e 3302 case '*':
79072805
LW
3303 case ' ':
3304 if (s[1] == '-') /* Additional switches on #! line. */
3305 return s+2;
3306 break;
a0d0e21e 3307 case '-':
79072805 3308 case 0:
51882d45 3309#if defined(WIN32) || !defined(PERL_STRICT_CR)
a868473f
NIS
3310 case '\r':
3311#endif
79072805
LW
3312 case '\n':
3313 case '\t':
3314 break;
aa689395 3315#ifdef ALTERNATE_SHEBANG
3316 case 'S': /* OS/2 needs -S on "extproc" line. */
3317 break;
3318#endif
a0d0e21e 3319 case 'P':
3280af22 3320 if (PL_preprocess)
a0d0e21e
LW
3321 return s+1;
3322 /* FALL THROUGH */
79072805 3323 default:
cea2e8a9 3324 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
79072805
LW
3325 }
3326 return Nullch;
3327}
3328
3329/* compliments of Tom Christiansen */
3330
3331/* unexec() can be found in the Gnu emacs distribution */
ee580363 3332/* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
79072805
LW
3333
3334void
864dbfa3 3335Perl_my_unexec(pTHX)
79072805
LW
3336{
3337#ifdef UNEXEC
46fc3d4c 3338 SV* prog;
3339 SV* file;
ee580363 3340 int status = 1;
79072805
LW
3341 extern int etext;
3342
ee580363 3343 prog = newSVpv(BIN_EXP, 0);
46fc3d4c 3344 sv_catpv(prog, "/perl");
6b88bc9c 3345 file = newSVpv(PL_origfilename, 0);
46fc3d4c 3346 sv_catpv(file, ".perldump");
79072805 3347
ee580363
GS
3348 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3349 /* unexec prints msg to stderr in case of failure */
6ad3d225 3350 PerlProc_exit(status);
79072805 3351#else
a5f75d66
AD
3352# ifdef VMS
3353# include <lib$routines.h>
3354 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
aa689395 3355# else
79072805 3356 ABORT(); /* for use with undump */
aa689395 3357# endif
a5f75d66 3358#endif
79072805
LW
3359}
3360
cb68f92d
GS
3361/* initialize curinterp */
3362STATIC void
cea2e8a9 3363S_init_interp(pTHX)
cb68f92d
GS
3364{
3365
acfe0abc
GS
3366#ifdef MULTIPLICITY
3367# define PERLVAR(var,type)
3368# define PERLVARA(var,n,type)
3369# if defined(PERL_IMPLICIT_CONTEXT)
3370# if defined(USE_5005THREADS)
3371# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
27da23d5 3372# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
acfe0abc
GS
3373# else /* !USE_5005THREADS */
3374# define PERLVARI(var,type,init) aTHX->var = init;
3375# define PERLVARIC(var,type,init) aTHX->var = init;
3376# endif /* USE_5005THREADS */
3967c732 3377# else
acfe0abc
GS
3378# define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3379# define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
066ef5b5 3380# endif
acfe0abc
GS
3381# include "intrpvar.h"
3382# ifndef USE_5005THREADS
3383# include "thrdvar.h"
3384# endif
3385# undef PERLVAR
3386# undef PERLVARA
3387# undef PERLVARI
3388# undef PERLVARIC
3389#else
3390# define PERLVAR(var,type)
3391# define PERLVARA(var,n,type)
3392# define PERLVARI(var,type,init) PL_##var = init;
3393# define PERLVARIC(var,type,init) PL_##var = init;
3394# include "intrpvar.h"
3395# ifndef USE_5005THREADS
3396# include "thrdvar.h"
3397# endif
3398# undef PERLVAR
3399# undef PERLVARA
3400# undef PERLVARI
3401# undef PERLVARIC
cb68f92d
GS
3402#endif
3403
cb68f92d
GS
3404}
3405
76e3520e 3406STATIC void
cea2e8a9 3407S_init_main_stash(pTHX)
79072805 3408{
463ee0b2 3409 GV *gv;
6e72f9df 3410
3280af22 3411 PL_curstash = PL_defstash = newHV();
79cb57f6 3412 PL_curstname = newSVpvn("main",4);
adbc6bb1
LW
3413 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3414 SvREFCNT_dec(GvHV(gv));
3280af22 3415 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
463ee0b2 3416 SvREADONLY_on(gv);
bfcb3514 3417 Perl_hv_name_set(aTHX_ PL_defstash, "main", 4, 0);
3280af22
NIS
3418 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3419 GvMULTI_on(PL_incgv);
3420 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3421 GvMULTI_on(PL_hintgv);
3422 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3423 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3424 GvMULTI_on(PL_errgv);
3425 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3426 GvMULTI_on(PL_replgv);
cea2e8a9 3427 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
c69033f2
NC
3428#ifdef PERL_DONT_CREATE_GVSV
3429 gv_SVadd(PL_errgv);
3430#endif
38a03e6e
MB
3431 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3432 sv_setpvn(ERRSV, "", 0);
3280af22 3433 PL_curstash = PL_defstash;
11faa288 3434 CopSTASH_set(&PL_compiling, PL_defstash);
ed094faf 3435 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3280af22 3436 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
4633a7c4 3437 /* We must init $/ before switches are processed. */
864dbfa3 3438 sv_setpvn(get_sv("/", TRUE), "\n", 1);
79072805
LW
3439}
3440
ae3f3efd 3441/* PSz 18 Nov 03 fdscript now global but do not change prototype */
76e3520e 3442STATIC void
dd374669 3443S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
79072805 3444{
ae3f3efd 3445#ifndef IAMSUID
e1ec3a88
AL
3446 const char *quote;
3447 const char *code;
3448 const char *cpp_discard_flag;
3449 const char *perl;
ae3f3efd 3450#endif
27da23d5 3451 dVAR;
1b24ed4b 3452
ae3f3efd
PS
3453 PL_fdscript = -1;
3454 PL_suidscript = -1;
79072805 3455
3280af22 3456 if (PL_e_script) {
ff5bdd37 3457 PL_origfilename = savepvn("-e", 2);
96436eeb 3458 }
6c4ab083
GS
3459 else {
3460 /* if find_script() returns, it returns a malloc()-ed value */
dd374669 3461 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
6c4ab083
GS
3462
3463 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
e1ec3a88 3464 const char *s = scriptname + 8;
ae3f3efd 3465 PL_fdscript = atoi(s);
6c4ab083
GS
3466 while (isDIGIT(*s))
3467 s++;
3468 if (*s) {
ae3f3efd
PS
3469 /* PSz 18 Feb 04
3470 * Tell apart "normal" usage of fdscript, e.g.
3471 * with bash on FreeBSD:
3472 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3473 * from usage in suidperl.
3474 * Does any "normal" usage leave garbage after the number???
3475 * Is it a mistake to use a similar /dev/fd/ construct for
3476 * suidperl?
3477 */
3478 PL_suidscript = 1;
3479 /* PSz 20 Feb 04
3480 * Be supersafe and do some sanity-checks.
3481 * Still, can we be sure we got the right thing?
3482 */
3483 if (*s != '/') {
3484 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3485 }
3486 if (! *(s+1)) {
3487 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3488 }
6c4ab083 3489 scriptname = savepv(s + 1);
3280af22 3490 Safefree(PL_origfilename);
dd374669 3491 PL_origfilename = (char *)scriptname;
6c4ab083
GS
3492 }
3493 }
3494 }
3495
05ec9bb3 3496 CopFILE_free(PL_curcop);
57843af0 3497 CopFILE_set(PL_curcop, PL_origfilename);
770526c1 3498 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
dd374669 3499 scriptname = (char *)"";
ae3f3efd
PS
3500 if (PL_fdscript >= 0) {
3501 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
1b24ed4b
MS
3502# if defined(HAS_FCNTL) && defined(F_SETFD)
3503 if (PL_rsfp)
3504 /* ensure close-on-exec */
3505 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3506# endif
96436eeb 3507 }
ae3f3efd
PS
3508#ifdef IAMSUID
3509 else {
86207487
NC
3510 Perl_croak(aTHX_ "sperl needs fd script\n"
3511 "You should not call sperl directly; do you need to "
3512 "change a #! line\nfrom sperl to perl?\n");
3513
ae3f3efd
PS
3514/* PSz 11 Nov 03
3515 * Do not open (or do other fancy stuff) while setuid.
3516 * Perl does the open, and hands script to suidperl on a fd;
3517 * suidperl only does some checks, sets up UIDs and re-execs
3518 * perl with that fd as it has always done.
3519 */
3520 }
3521 if (PL_suidscript != 1) {
3522 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3523 }
3524#else /* IAMSUID */
3280af22 3525 else if (PL_preprocess) {
dd374669 3526 const char *cpp_cfg = CPPSTDIN;
79cb57f6 3527 SV *cpp = newSVpvn("",0);
46fc3d4c 3528 SV *cmd = NEWSV(0,0);
3529
ae58f265
JH
3530 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3531 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
46fc3d4c 3532 if (strEQ(cpp_cfg, "cppstdin"))
cea2e8a9 3533 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
46fc3d4c 3534 sv_catpv(cpp, cpp_cfg);
79072805 3535
1b24ed4b
MS
3536# ifndef VMS
3537 sv_catpvn(sv, "-I", 2);
3538 sv_catpv(sv,PRIVLIB_EXP);
3539# endif
46fc3d4c 3540
14953ddc
MB
3541 DEBUG_P(PerlIO_printf(Perl_debug_log,
3542 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
848ef955
NC
3543 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3544 CPPMINUS));
1b24ed4b
MS
3545
3546# if defined(MSDOS) || defined(WIN32) || defined(VMS)
3547 quote = "\"";
3548# else
3549 quote = "'";
3550# endif
3551
3552# ifdef VMS
3553 cpp_discard_flag = "";
3554# else
3555 cpp_discard_flag = "-C";
3556# endif
3557
3558# ifdef OS2
3559 perl = os2_execname(aTHX);
3560# else
3561 perl = PL_origargv[0];
3562# endif
3563
3564
3565 /* This strips off Perl comments which might interfere with
62375a60
NIS
3566 the C pre-processor, including #!. #line directives are
3567 deliberately stripped to avoid confusion with Perl's version
1b24ed4b
MS
3568 of #line. FWP played some golf with it so it will fit
3569 into VMS's 255 character buffer.
3570 */
3571 if( PL_doextract )
3572 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3573 else
3574 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3575
3576 Perl_sv_setpvf(aTHX_ cmd, "\
3577%s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
62375a60 3578 perl, quote, code, quote, scriptname, cpp,
1b24ed4b
MS
3579 cpp_discard_flag, sv, CPPMINUS);
3580
3280af22 3581 PL_doextract = FALSE;
0a6c758d 3582
62375a60
NIS
3583 DEBUG_P(PerlIO_printf(Perl_debug_log,
3584 "PL_preprocess: cmd=\"%s\"\n",
848ef955 3585 SvPVX_const(cmd)));
0a6c758d 3586
848ef955 3587 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
46fc3d4c 3588 SvREFCNT_dec(cmd);
3589 SvREFCNT_dec(cpp);
79072805
LW
3590 }
3591 else if (!*scriptname) {