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Perl 5 - perl.git/blob - perl.c
1 #line 2 "perl.c"
2 /* perl.c
3 *
4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
6 * 2013, 2014, 2015, 2016, 2017 by Larry Wall and others
7 *
8 * You may distribute under the terms of either the GNU General Public
9 * License or the Artistic License, as specified in the README file.
10 *
11 */
13 /*
14 * A ship then new they built for him
15 * of mithril and of elven-glass
16 * --from Bilbo's song of Eärendil
17 *
18 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
19 */
21 /* This file contains the top-level functions that are used to create, use
22 * and destroy a perl interpreter, plus the functions used by XS code to
23 * call back into perl. Note that it does not contain the actual main()
24 * function of the interpreter; that can be found in perlmain.c
25 *
26 * Note that at build time this file is also linked to as perlmini.c,
27 * and perlmini.o is then built with PERL_IS_MINIPERL defined, which is
28 * then used to create the miniperl executable, rather than perl.o.
29 */
31 #if defined(PERL_IS_MINIPERL) && !defined(USE_SITECUSTOMIZE)
32 # define USE_SITECUSTOMIZE
33 #endif
35 #include "EXTERN.h"
36 #define PERL_IN_PERL_C
37 #include "perl.h"
38 #include "patchlevel.h" /* for local_patches */
39 #include "XSUB.h"
41 #ifdef NETWARE
42 #include "nwutil.h"
43 #endif
45 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
46 # ifdef I_SYSUIO
47 # include <sys/uio.h>
48 # endif
50 union control_un {
51 struct cmsghdr cm;
52 char control[CMSG_SPACE(sizeof(int))];
53 };
55 #endif
57 #ifndef HZ
58 # ifdef CLK_TCK
59 # define HZ CLK_TCK
60 # else
61 # define HZ 60
62 # endif
63 #endif
65 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
66 char *getenv (char *); /* Usually in <stdlib.h> */
67 #endif
69 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
71 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
72 # define validate_suid(rsfp) NOOP
73 #else
74 # define validate_suid(rsfp) S_validate_suid(aTHX_ rsfp)
75 #endif
77 #define CALL_BODY_SUB(myop) \
78 if (PL_op == (myop)) \
79 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
80 if (PL_op) \
81 CALLRUNOPS(aTHX);
83 #define CALL_LIST_BODY(cv) \
84 PUSHMARK(PL_stack_sp); \
85 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD|G_VOID);
87 static void
88 S_init_tls_and_interp(PerlInterpreter *my_perl)
89 {
90 dVAR;
91 if (!PL_curinterp) {
92 PERL_SET_INTERP(my_perl);
93 #if defined(USE_ITHREADS)
94 INIT_THREADS;
95 ALLOC_THREAD_KEY;
96 PERL_SET_THX(my_perl);
97 OP_REFCNT_INIT;
98 OP_CHECK_MUTEX_INIT;
99 HINTS_REFCNT_INIT;
100 LOCALE_INIT;
101 MUTEX_INIT(&PL_dollarzero_mutex);
102 MUTEX_INIT(&PL_my_ctx_mutex);
103 # endif
104 }
105 #if defined(USE_ITHREADS)
106 else
107 #else
108 /* This always happens for non-ithreads */
109 #endif
110 {
111 PERL_SET_THX(my_perl);
112 }
113 }
116 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
118 void
119 Perl_sys_init(int* argc, char*** argv)
120 {
121 dVAR;
123 PERL_ARGS_ASSERT_SYS_INIT;
125 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
126 PERL_UNUSED_ARG(argv);
127 PERL_SYS_INIT_BODY(argc, argv);
128 }
130 void
131 Perl_sys_init3(int* argc, char*** argv, char*** env)
132 {
133 dVAR;
135 PERL_ARGS_ASSERT_SYS_INIT3;
137 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
138 PERL_UNUSED_ARG(argv);
139 PERL_UNUSED_ARG(env);
140 PERL_SYS_INIT3_BODY(argc, argv, env);
141 }
143 void
144 Perl_sys_term(void)
145 {
146 dVAR;
147 if (!PL_veto_cleanup) {
148 PERL_SYS_TERM_BODY();
149 }
150 }
153 #ifdef PERL_IMPLICIT_SYS
154 PerlInterpreter *
155 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
156 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
157 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
158 struct IPerlDir* ipD, struct IPerlSock* ipS,
159 struct IPerlProc* ipP)
160 {
161 PerlInterpreter *my_perl;
163 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
165 /* Newx() needs interpreter, so call malloc() instead */
166 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
167 S_init_tls_and_interp(my_perl);
168 Zero(my_perl, 1, PerlInterpreter);
169 PL_Mem = ipM;
170 PL_MemShared = ipMS;
171 PL_MemParse = ipMP;
172 PL_Env = ipE;
173 PL_StdIO = ipStd;
174 PL_LIO = ipLIO;
175 PL_Dir = ipD;
176 PL_Sock = ipS;
177 PL_Proc = ipP;
178 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
180 return my_perl;
181 }
182 #else
184 /*
185 =head1 Embedding Functions
187 =for apidoc perl_alloc
189 Allocates a new Perl interpreter. See L<perlembed>.
191 =cut
192 */
194 PerlInterpreter *
195 perl_alloc(void)
196 {
197 PerlInterpreter *my_perl;
199 /* Newx() needs interpreter, so call malloc() instead */
200 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
202 S_init_tls_and_interp(my_perl);
203 #ifndef PERL_TRACK_MEMPOOL
204 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
205 #else
206 Zero(my_perl, 1, PerlInterpreter);
207 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
208 return my_perl;
209 #endif
210 }
211 #endif /* PERL_IMPLICIT_SYS */
213 /*
214 =for apidoc perl_construct
216 Initializes a new Perl interpreter. See L<perlembed>.
218 =cut
219 */
221 static void
222 S_fixup_platform_bugs(void)
223 {
224 #if defined(__GLIBC__) && IVSIZE == 8 \
225 && ( __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8))
226 {
227 IV l = 3;
228 IV r = -10;
229 /* Cannot do this check with inlined IV constants since
230 * that seems to work correctly even with the buggy glibc. */
231 if (l % r == -3) {
232 dTHX;
233 /* Yikes, we have the bug.
234 * Patch in the workaround version. */
235 PL_ppaddr[OP_I_MODULO] = &Perl_pp_i_modulo_glibc_bugfix;
236 }
237 }
238 #endif
239 }
241 void
242 perl_construct(pTHXx)
243 {
244 dVAR;
246 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
248 #ifdef MULTIPLICITY
249 init_interp();
250 PL_perl_destruct_level = 1;
251 #else
252 PERL_UNUSED_ARG(my_perl);
253 if (PL_perl_destruct_level > 0)
254 init_interp();
255 #endif
256 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
258 #ifdef PERL_TRACE_OPS
259 Zero(PL_op_exec_cnt, OP_max+2, UV);
260 #endif
262 init_constants();
264 SvREADONLY_on(&PL_sv_placeholder);
265 SvREFCNT(&PL_sv_placeholder) = SvREFCNT_IMMORTAL;
267 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
268 #ifdef PERL_USES_PL_PIDSTATUS
269 PL_pidstatus = newHV();
270 #endif
272 PL_rs = newSVpvs("\n");
274 init_stacks();
276 init_ids();
278 S_fixup_platform_bugs();
280 JMPENV_BOOTSTRAP;
281 STATUS_ALL_SUCCESS;
283 init_i18nl10n(1);
285 #if defined(LOCAL_PATCH_COUNT)
286 PL_localpatches = local_patches; /* For possible -v */
287 #endif
289 #ifdef HAVE_INTERP_INTERN
290 sys_intern_init();
291 #endif
293 PerlIO_init(aTHX); /* Hook to IO system */
295 PL_fdpid = newAV(); /* for remembering popen pids by fd */
296 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
297 PL_errors = newSVpvs("");
298 SvPVCLEAR(PERL_DEBUG_PAD(0)); /* For regex debugging. */
299 SvPVCLEAR(PERL_DEBUG_PAD(1)); /* ext/re needs these */
300 SvPVCLEAR(PERL_DEBUG_PAD(2)); /* even without DEBUGGING. */
301 #ifdef USE_ITHREADS
302 /* First entry is a list of empty elements. It needs to be initialised
303 else all hell breaks loose in S_find_uninit_var(). */
304 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
305 PL_regex_pad = AvARRAY(PL_regex_padav);
306 Newxz(PL_stashpad, PL_stashpadmax, HV *);
307 #endif
308 #ifdef USE_REENTRANT_API
309 Perl_reentrant_init(aTHX);
310 #endif
311 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
312 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
313 * This MUST be done before any hash stores or fetches take place.
314 * If you set PL_hash_seed (and presumably also PL_hash_seed_set)
315 * yourself, it is your responsibility to provide a good random seed!
316 * You can also define PERL_HASH_SEED in compile time, see hv.h.
317 *
318 * XXX: fix this comment */
319 if (PL_hash_seed_set == FALSE) {
320 Perl_get_hash_seed(aTHX_ PL_hash_seed);
321 PL_hash_seed_set= TRUE;
322 }
323 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
325 /* Note that strtab is a rather special HV. Assumptions are made
326 about not iterating on it, and not adding tie magic to it.
327 It is properly deallocated in perl_destruct() */
328 PL_strtab = newHV();
330 HvSHAREKEYS_off(PL_strtab); /* mandatory */
331 hv_ksplit(PL_strtab, 512);
333 Zero(PL_sv_consts, SV_CONSTS_COUNT, SV*);
335 #ifndef PERL_MICRO
336 # ifdef USE_ENVIRON_ARRAY
337 PL_origenviron = environ;
338 # endif
339 #endif
341 /* Use sysconf(_SC_CLK_TCK) if available, if not
342 * available or if the sysconf() fails, use the HZ.
343 * The HZ if not originally defined has been by now
344 * been defined as CLK_TCK, if available. */
345 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK)
346 PL_clocktick = sysconf(_SC_CLK_TCK);
347 if (PL_clocktick <= 0)
348 #endif
349 PL_clocktick = HZ;
351 PL_stashcache = newHV();
353 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
355 #ifdef HAS_MMAP
356 if (!PL_mmap_page_size) {
357 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
358 {
359 SETERRNO(0, SS_NORMAL);
360 # ifdef _SC_PAGESIZE
361 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
362 # else
363 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
364 # endif
365 if ((long) PL_mmap_page_size < 0) {
366 if (errno) {
367 SV * const error = ERRSV;
368 SvUPGRADE(error, SVt_PV);
369 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
370 }
371 else
372 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
373 }
374 }
375 #else
376 # ifdef HAS_GETPAGESIZE
377 PL_mmap_page_size = getpagesize();
378 # else
379 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
380 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
381 # endif
382 # endif
383 #endif
384 if (PL_mmap_page_size <= 0)
385 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
386 (IV) PL_mmap_page_size);
387 }
388 #endif /* HAS_MMAP */
390 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
391 PL_timesbase.tms_utime = 0;
392 PL_timesbase.tms_stime = 0;
393 PL_timesbase.tms_cutime = 0;
394 PL_timesbase.tms_cstime = 0;
395 #endif
397 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
399 PL_registered_mros = newHV();
400 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
401 HvMAX(PL_registered_mros) = 0;
403 PL_XPosix_ptrs[_CC_ASCII] = _new_invlist_C_array(ASCII_invlist);
404 PL_XPosix_ptrs[_CC_ALPHANUMERIC] = _new_invlist_C_array(XPosixAlnum_invlist);
405 PL_XPosix_ptrs[_CC_ALPHA] = _new_invlist_C_array(XPosixAlpha_invlist);
406 PL_XPosix_ptrs[_CC_BLANK] = _new_invlist_C_array(XPosixBlank_invlist);
407 PL_XPosix_ptrs[_CC_CASED] = _new_invlist_C_array(Cased_invlist);
408 PL_XPosix_ptrs[_CC_CNTRL] = _new_invlist_C_array(XPosixCntrl_invlist);
409 PL_XPosix_ptrs[_CC_DIGIT] = _new_invlist_C_array(XPosixDigit_invlist);
410 PL_XPosix_ptrs[_CC_GRAPH] = _new_invlist_C_array(XPosixGraph_invlist);
411 PL_XPosix_ptrs[_CC_LOWER] = _new_invlist_C_array(XPosixLower_invlist);
412 PL_XPosix_ptrs[_CC_PRINT] = _new_invlist_C_array(XPosixPrint_invlist);
413 PL_XPosix_ptrs[_CC_PUNCT] = _new_invlist_C_array(XPosixPunct_invlist);
414 PL_XPosix_ptrs[_CC_SPACE] = _new_invlist_C_array(XPerlSpace_invlist);
415 PL_XPosix_ptrs[_CC_UPPER] = _new_invlist_C_array(XPosixUpper_invlist);
416 PL_XPosix_ptrs[_CC_VERTSPACE] = _new_invlist_C_array(VertSpace_invlist);
417 PL_XPosix_ptrs[_CC_WORDCHAR] = _new_invlist_C_array(XPosixWord_invlist);
418 PL_XPosix_ptrs[_CC_XDIGIT] = _new_invlist_C_array(XPosixXDigit_invlist);
419 PL_GCB_invlist = _new_invlist_C_array(_Perl_GCB_invlist);
420 PL_SB_invlist = _new_invlist_C_array(_Perl_SB_invlist);
421 PL_WB_invlist = _new_invlist_C_array(_Perl_WB_invlist);
422 PL_LB_invlist = _new_invlist_C_array(_Perl_LB_invlist);
423 PL_Assigned_invlist = _new_invlist_C_array(Assigned_invlist);
424 #ifdef USE_THREAD_SAFE_LOCALE
425 PL_C_locale_obj = newlocale(LC_ALL_MASK, "C", NULL);
426 #endif
428 ENTER;
429 }
431 /*
432 =for apidoc nothreadhook
434 Stub that provides thread hook for perl_destruct when there are
435 no threads.
437 =cut
438 */
440 int
441 Perl_nothreadhook(pTHX)
442 {
443 PERL_UNUSED_CONTEXT;
444 return 0;
445 }
447 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
448 void
449 Perl_dump_sv_child(pTHX_ SV *sv)
450 {
451 ssize_t got;
452 const int sock = PL_dumper_fd;
453 const int debug_fd = PerlIO_fileno(Perl_debug_log);
454 union control_un control;
455 struct msghdr msg;
456 struct iovec vec[2];
457 struct cmsghdr *cmptr;
458 int returned_errno;
459 unsigned char buffer[256];
461 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
463 if(sock == -1 || debug_fd == -1)
464 return;
466 PerlIO_flush(Perl_debug_log);
468 /* All these shenanigans are to pass a file descriptor over to our child for
469 it to dump out to. We can't let it hold open the file descriptor when it
470 forks, as the file descriptor it will dump to can turn out to be one end
471 of pipe that some other process will wait on for EOF. (So as it would
472 be open, the wait would be forever.) */
474 msg.msg_control = control.control;
475 msg.msg_controllen = sizeof(control.control);
476 /* We're a connected socket so we don't need a destination */
477 msg.msg_name = NULL;
478 msg.msg_namelen = 0;
479 msg.msg_iov = vec;
480 msg.msg_iovlen = 1;
482 cmptr = CMSG_FIRSTHDR(&msg);
483 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
484 cmptr->cmsg_level = SOL_SOCKET;
485 cmptr->cmsg_type = SCM_RIGHTS;
486 *((int *)CMSG_DATA(cmptr)) = 1;
488 vec[0].iov_base = (void*)&sv;
489 vec[0].iov_len = sizeof(sv);
490 got = sendmsg(sock, &msg, 0);
492 if(got < 0) {
493 perror("Debug leaking scalars parent sendmsg failed");
494 abort();
495 }
496 if(got < sizeof(sv)) {
497 perror("Debug leaking scalars parent short sendmsg");
498 abort();
499 }
501 /* Return protocol is
502 int: errno value
503 unsigned char: length of location string (0 for empty)
504 unsigned char*: string (not terminated)
505 */
506 vec[0].iov_base = (void*)&returned_errno;
507 vec[0].iov_len = sizeof(returned_errno);
508 vec[1].iov_base = buffer;
509 vec[1].iov_len = 1;
511 got = readv(sock, vec, 2);
513 if(got < 0) {
514 perror("Debug leaking scalars parent read failed");
515 PerlIO_flush(PerlIO_stderr());
516 abort();
517 }
518 if(got < sizeof(returned_errno) + 1) {
519 perror("Debug leaking scalars parent short read");
520 PerlIO_flush(PerlIO_stderr());
521 abort();
522 }
524 if (*buffer) {
525 got = read(sock, buffer + 1, *buffer);
526 if(got < 0) {
527 perror("Debug leaking scalars parent read 2 failed");
528 PerlIO_flush(PerlIO_stderr());
529 abort();
530 }
532 if(got < *buffer) {
533 perror("Debug leaking scalars parent short read 2");
534 PerlIO_flush(PerlIO_stderr());
535 abort();
536 }
537 }
539 if (returned_errno || *buffer) {
540 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
541 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
542 returned_errno, Strerror(returned_errno));
543 }
544 }
545 #endif
547 /*
548 =for apidoc perl_destruct
550 Shuts down a Perl interpreter. See L<perlembed>.
552 =cut
553 */
555 int
556 perl_destruct(pTHXx)
557 {
558 dVAR;
559 VOL signed char destruct_level; /* see possible values in intrpvar.h */
560 HV *hv;
561 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
562 pid_t child;
563 #endif
564 int i;
566 PERL_ARGS_ASSERT_PERL_DESTRUCT;
567 #ifndef MULTIPLICITY
568 PERL_UNUSED_ARG(my_perl);
569 #endif
571 assert(PL_scopestack_ix == 1);
573 /* wait for all pseudo-forked children to finish */
574 PERL_WAIT_FOR_CHILDREN;
576 destruct_level = PL_perl_destruct_level;
577 #if defined(DEBUGGING) || defined(PERL_TRACK_MEMPOOL)
578 {
579 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
580 if (s) {
581 int i;
582 if (strEQ(s, "-1")) { /* Special case: modperl folklore. */
583 i = -1;
584 } else {
585 UV uv;
586 if (grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
587 i = (int)uv;
588 else
589 i = 0;
590 }
591 #ifdef DEBUGGING
592 if (destruct_level < i) destruct_level = i;
593 #endif
594 #ifdef PERL_TRACK_MEMPOOL
595 /* RT #114496, for perl_free */
596 PL_perl_destruct_level = i;
597 #endif
598 }
599 }
600 #endif
602 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
603 dJMPENV;
604 int x = 0;
606 JMPENV_PUSH(x);
607 PERL_UNUSED_VAR(x);
608 if (PL_endav && !PL_minus_c) {
609 PERL_SET_PHASE(PERL_PHASE_END);
610 call_list(PL_scopestack_ix, PL_endav);
611 }
612 JMPENV_POP;
613 }
614 LEAVE;
615 FREETMPS;
616 assert(PL_scopestack_ix == 0);
618 /* Need to flush since END blocks can produce output */
619 /* flush stdout separately, since we can identify it */
620 #ifdef USE_PERLIO
621 {
622 PerlIO *stdo = PerlIO_stdout();
623 if (*stdo && PerlIO_flush(stdo)) {
624 PerlIO_restore_errno(stdo);
625 if (errno)
626 PerlIO_printf(PerlIO_stderr(), "Unable to flush stdout: %s",
627 Strerror(errno));
628 if (!STATUS_UNIX)
629 STATUS_ALL_FAILURE;
630 }
631 }
632 #endif
633 my_fflush_all();
635 #ifdef PERL_TRACE_OPS
636 /* dump OP-counts if $ENV{PERL_TRACE_OPS} > 0 */
637 {
638 const char * const ptoenv = PerlEnv_getenv("PERL_TRACE_OPS");
639 UV uv;
641 if (!ptoenv || !Perl_grok_atoUV(ptoenv, &uv, NULL)
642 || !(uv > 0))
643 goto no_trace_out;
644 }
645 PerlIO_printf(Perl_debug_log, "Trace of all OPs executed:\n");
646 for (i = 0; i <= OP_max; ++i) {
647 if (PL_op_exec_cnt[i])
648 PerlIO_printf(Perl_debug_log, " %s: %" UVuf "\n", PL_op_name[i], PL_op_exec_cnt[i]);
649 }
650 /* Utility slot for easily doing little tracing experiments in the runloop: */
651 if (PL_op_exec_cnt[OP_max+1] != 0)
652 PerlIO_printf(Perl_debug_log, " SPECIAL: %" UVuf "\n", PL_op_exec_cnt[OP_max+1]);
653 PerlIO_printf(Perl_debug_log, "\n");
654 no_trace_out:
655 #endif
658 if (PL_threadhook(aTHX)) {
659 /* Threads hook has vetoed further cleanup */
660 PL_veto_cleanup = TRUE;
661 return STATUS_EXIT;
662 }
664 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
665 if (destruct_level != 0) {
666 /* Fork here to create a child. Our child's job is to preserve the
667 state of scalars prior to destruction, so that we can instruct it
668 to dump any scalars that we later find have leaked.
669 There's no subtlety in this code - it assumes POSIX, and it doesn't
670 fail gracefully */
671 int fd[2];
673 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
674 perror("Debug leaking scalars socketpair failed");
675 abort();
676 }
678 child = fork();
679 if(child == -1) {
680 perror("Debug leaking scalars fork failed");
681 abort();
682 }
683 if (!child) {
684 /* We are the child */
685 const int sock = fd[1];
686 const int debug_fd = PerlIO_fileno(Perl_debug_log);
687 int f;
688 const char *where;
689 /* Our success message is an integer 0, and a char 0 */
690 static const char success[sizeof(int) + 1] = {0};
692 close(fd[0]);
694 /* We need to close all other file descriptors otherwise we end up
695 with interesting hangs, where the parent closes its end of a
696 pipe, and sits waiting for (another) child to terminate. Only
697 that child never terminates, because it never gets EOF, because
698 we also have the far end of the pipe open. We even need to
699 close the debugging fd, because sometimes it happens to be one
700 end of a pipe, and a process is waiting on the other end for
701 EOF. Normally it would be closed at some point earlier in
702 destruction, but if we happen to cause the pipe to remain open,
703 EOF never occurs, and we get an infinite hang. Hence all the
704 games to pass in a file descriptor if it's actually needed. */
706 f = sysconf(_SC_OPEN_MAX);
707 if(f < 0) {
708 where = "sysconf failed";
709 goto abort;
710 }
711 while (f--) {
712 if (f == sock)
713 continue;
714 close(f);
715 }
717 while (1) {
718 SV *target;
719 union control_un control;
720 struct msghdr msg;
721 struct iovec vec[1];
722 struct cmsghdr *cmptr;
723 ssize_t got;
724 int got_fd;
726 msg.msg_control = control.control;
727 msg.msg_controllen = sizeof(control.control);
728 /* We're a connected socket so we don't need a source */
729 msg.msg_name = NULL;
730 msg.msg_namelen = 0;
731 msg.msg_iov = vec;
732 msg.msg_iovlen = C_ARRAY_LENGTH(vec);
734 vec[0].iov_base = (void*)⌖
735 vec[0].iov_len = sizeof(target);
737 got = recvmsg(sock, &msg, 0);
739 if(got == 0)
740 break;
741 if(got < 0) {
742 where = "recv failed";
743 goto abort;
744 }
745 if(got < sizeof(target)) {
746 where = "short recv";
747 goto abort;
748 }
750 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
751 where = "no cmsg";
752 goto abort;
753 }
754 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
755 where = "wrong cmsg_len";
756 goto abort;
757 }
758 if(cmptr->cmsg_level != SOL_SOCKET) {
759 where = "wrong cmsg_level";
760 goto abort;
761 }
762 if(cmptr->cmsg_type != SCM_RIGHTS) {
763 where = "wrong cmsg_type";
764 goto abort;
765 }
767 got_fd = *(int*)CMSG_DATA(cmptr);
768 /* For our last little bit of trickery, put the file descriptor
769 back into Perl_debug_log, as if we never actually closed it
770 */
771 if(got_fd != debug_fd) {
772 if (dup2(got_fd, debug_fd) == -1) {
773 where = "dup2";
774 goto abort;
775 }
776 }
777 sv_dump(target);
779 PerlIO_flush(Perl_debug_log);
781 got = write(sock, &success, sizeof(success));
783 if(got < 0) {
784 where = "write failed";
785 goto abort;
786 }
787 if(got < sizeof(success)) {
788 where = "short write";
789 goto abort;
790 }
791 }
792 _exit(0);
793 abort:
794 {
795 int send_errno = errno;
796 unsigned char length = (unsigned char) strlen(where);
797 struct iovec failure[3] = {
798 {(void*)&send_errno, sizeof(send_errno)},
799 {&length, 1},
800 {(void*)where, length}
801 };
802 int got = writev(sock, failure, 3);
803 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
804 in the parent if we try to read from the socketpair after the
805 child has exited, even if there was data to read.
806 So sleep a bit to give the parent a fighting chance of
807 reading the data. */
808 sleep(2);
809 _exit((got == -1) ? errno : 0);
810 }
811 /* End of child. */
812 }
813 PL_dumper_fd = fd[0];
814 close(fd[1]);
815 }
816 #endif
818 /* We must account for everything. */
820 /* Destroy the main CV and syntax tree */
821 /* Set PL_curcop now, because destroying ops can cause new SVs
822 to be generated in Perl_pad_swipe, and when running with
823 -DDEBUG_LEAKING_SCALARS they expect PL_curcop to point to a valid
824 op from which the filename structure member is copied. */
825 PL_curcop = &PL_compiling;
826 if (PL_main_root) {
827 /* ensure comppad/curpad to refer to main's pad */
828 if (CvPADLIST(PL_main_cv)) {
829 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
830 PL_comppad_name = PadlistNAMES(CvPADLIST(PL_main_cv));
831 }
832 op_free(PL_main_root);
833 PL_main_root = NULL;
834 }
835 PL_main_start = NULL;
836 /* note that PL_main_cv isn't usually actually freed at this point,
837 * due to the CvOUTSIDE refs from subs compiled within it. It will
838 * get freed once all the subs are freed in sv_clean_all(), for
839 * destruct_level > 0 */
840 SvREFCNT_dec(PL_main_cv);
841 PL_main_cv = NULL;
842 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
844 /* Tell PerlIO we are about to tear things apart in case
845 we have layers which are using resources that should
846 be cleaned up now.
847 */
849 PerlIO_destruct(aTHX);
851 /*
852 * Try to destruct global references. We do this first so that the
853 * destructors and destructees still exist. Some sv's might remain.
854 * Non-referenced objects are on their own.
855 */
856 sv_clean_objs();
858 /* unhook hooks which will soon be, or use, destroyed data */
859 SvREFCNT_dec(PL_warnhook);
860 PL_warnhook = NULL;
861 SvREFCNT_dec(PL_diehook);
862 PL_diehook = NULL;
864 /* call exit list functions */
865 while (PL_exitlistlen-- > 0)
866 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
868 Safefree(PL_exitlist);
870 PL_exitlist = NULL;
871 PL_exitlistlen = 0;
873 SvREFCNT_dec(PL_registered_mros);
875 /* jettison our possibly duplicated environment */
876 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
877 * so we certainly shouldn't free it here
878 */
879 #ifndef PERL_MICRO
880 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
881 if (environ != PL_origenviron && !PL_use_safe_putenv
882 #ifdef USE_ITHREADS
883 /* only main thread can free environ[0] contents */
884 && PL_curinterp == aTHX
885 #endif
886 )
887 {
888 I32 i;
890 for (i = 0; environ[i]; i++)
891 safesysfree(environ[i]);
893 /* Must use safesysfree() when working with environ. */
894 safesysfree(environ);
896 environ = PL_origenviron;
897 }
898 #endif
899 #endif /* !PERL_MICRO */
901 if (destruct_level == 0) {
903 DEBUG_P(debprofdump());
905 #if defined(PERLIO_LAYERS)
906 /* No more IO - including error messages ! */
907 PerlIO_cleanup(aTHX);
908 #endif
910 CopFILE_free(&PL_compiling);
912 /* The exit() function will do everything that needs doing. */
913 return STATUS_EXIT;
914 }
916 /* Below, do clean up for when PERL_DESTRUCT_LEVEL is not 0 */
918 #ifdef USE_ITHREADS
919 /* the syntax tree is shared between clones
920 * so op_free(PL_main_root) only ReREFCNT_dec's
921 * REGEXPs in the parent interpreter
922 * we need to manually ReREFCNT_dec for the clones
923 */
924 {
925 I32 i = AvFILLp(PL_regex_padav);
926 SV **ary = AvARRAY(PL_regex_padav);
928 for (; i; i--) {
929 SvREFCNT_dec(ary[i]);
930 ary[i] = &PL_sv_undef;
931 }
932 }
933 #endif
936 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
937 PL_stashcache = NULL;
939 /* loosen bonds of global variables */
941 /* XXX can PL_parser still be non-null here? */
942 if(PL_parser && PL_parser->rsfp) {
943 (void)PerlIO_close(PL_parser->rsfp);
944 PL_parser->rsfp = NULL;
945 }
947 if (PL_minus_F) {
948 Safefree(PL_splitstr);
949 PL_splitstr = NULL;
950 }
952 /* switches */
953 PL_minus_n = FALSE;
954 PL_minus_p = FALSE;
955 PL_minus_l = FALSE;
956 PL_minus_a = FALSE;
957 PL_minus_F = FALSE;
958 PL_doswitches = FALSE;
959 PL_dowarn = G_WARN_OFF;
960 #ifdef PERL_SAWAMPERSAND
961 PL_sawampersand = 0; /* must save all match strings */
962 #endif
963 PL_unsafe = FALSE;
965 Safefree(PL_inplace);
966 PL_inplace = NULL;
967 SvREFCNT_dec(PL_patchlevel);
969 if (PL_e_script) {
970 SvREFCNT_dec(PL_e_script);
971 PL_e_script = NULL;
972 }
974 PL_perldb = 0;
976 /* magical thingies */
978 SvREFCNT_dec(PL_ofsgv); /* *, */
979 PL_ofsgv = NULL;
981 SvREFCNT_dec(PL_ors_sv); /* $\ */
982 PL_ors_sv = NULL;
984 SvREFCNT_dec(PL_rs); /* $/ */
985 PL_rs = NULL;
987 Safefree(PL_osname); /* $^O */
988 PL_osname = NULL;
990 SvREFCNT_dec(PL_statname);
991 PL_statname = NULL;
992 PL_statgv = NULL;
994 /* defgv, aka *_ should be taken care of elsewhere */
996 /* float buffer */
997 Safefree(PL_efloatbuf);
998 PL_efloatbuf = NULL;
999 PL_efloatsize = 0;
1001 /* startup and shutdown function lists */
1002 SvREFCNT_dec(PL_beginav);
1003 SvREFCNT_dec(PL_beginav_save);
1004 SvREFCNT_dec(PL_endav);
1005 SvREFCNT_dec(PL_checkav);
1006 SvREFCNT_dec(PL_checkav_save);
1007 SvREFCNT_dec(PL_unitcheckav);
1008 SvREFCNT_dec(PL_unitcheckav_save);
1009 SvREFCNT_dec(PL_initav);
1010 PL_beginav = NULL;
1011 PL_beginav_save = NULL;
1012 PL_endav = NULL;
1013 PL_checkav = NULL;
1014 PL_checkav_save = NULL;
1015 PL_unitcheckav = NULL;
1016 PL_unitcheckav_save = NULL;
1017 PL_initav = NULL;
1019 /* shortcuts just get cleared */
1020 PL_hintgv = NULL;
1021 PL_errgv = NULL;
1022 PL_argvoutgv = NULL;
1023 PL_stdingv = NULL;
1024 PL_stderrgv = NULL;
1025 PL_last_in_gv = NULL;
1026 PL_DBsingle = NULL;
1027 PL_DBtrace = NULL;
1028 PL_DBsignal = NULL;
1029 PL_DBsingle_iv = 0;
1030 PL_DBtrace_iv = 0;
1031 PL_DBsignal_iv = 0;
1032 PL_DBcv = NULL;
1033 PL_dbargs = NULL;
1034 PL_debstash = NULL;
1036 SvREFCNT_dec(PL_envgv);
1037 SvREFCNT_dec(PL_incgv);
1038 SvREFCNT_dec(PL_argvgv);
1039 SvREFCNT_dec(PL_replgv);
1040 SvREFCNT_dec(PL_DBgv);
1041 SvREFCNT_dec(PL_DBline);
1042 SvREFCNT_dec(PL_DBsub);
1043 PL_envgv = NULL;
1044 PL_incgv = NULL;
1045 PL_argvgv = NULL;
1046 PL_replgv = NULL;
1047 PL_DBgv = NULL;
1048 PL_DBline = NULL;
1049 PL_DBsub = NULL;
1051 SvREFCNT_dec(PL_argvout_stack);
1052 PL_argvout_stack = NULL;
1054 SvREFCNT_dec(PL_modglobal);
1055 PL_modglobal = NULL;
1056 SvREFCNT_dec(PL_preambleav);
1057 PL_preambleav = NULL;
1058 SvREFCNT_dec(PL_subname);
1059 PL_subname = NULL;
1060 #ifdef PERL_USES_PL_PIDSTATUS
1061 SvREFCNT_dec(PL_pidstatus);
1062 PL_pidstatus = NULL;
1063 #endif
1064 SvREFCNT_dec(PL_toptarget);
1065 PL_toptarget = NULL;
1066 SvREFCNT_dec(PL_bodytarget);
1067 PL_bodytarget = NULL;
1068 PL_formtarget = NULL;
1070 /* free locale stuff */
1071 #ifdef USE_LOCALE_COLLATE
1072 Safefree(PL_collation_name);
1073 PL_collation_name = NULL;
1074 #endif
1076 #ifdef USE_LOCALE_NUMERIC
1077 Safefree(PL_numeric_name);
1078 PL_numeric_name = NULL;
1079 SvREFCNT_dec(PL_numeric_radix_sv);
1080 PL_numeric_radix_sv = NULL;
1081 #endif
1083 /* clear character classes */
1084 for (i = 0; i < POSIX_SWASH_COUNT; i++) {
1085 SvREFCNT_dec(PL_utf8_swash_ptrs[i]);
1086 PL_utf8_swash_ptrs[i] = NULL;
1087 }
1088 SvREFCNT_dec(PL_utf8_mark);
1089 SvREFCNT_dec(PL_utf8_toupper);
1090 SvREFCNT_dec(PL_utf8_totitle);
1091 SvREFCNT_dec(PL_utf8_tolower);
1092 SvREFCNT_dec(PL_utf8_tofold);
1093 SvREFCNT_dec(PL_utf8_idstart);
1094 SvREFCNT_dec(PL_utf8_idcont);
1095 SvREFCNT_dec(PL_utf8_foldable);
1096 SvREFCNT_dec(PL_utf8_foldclosures);
1097 SvREFCNT_dec(PL_AboveLatin1);
1098 SvREFCNT_dec(PL_InBitmap);
1099 SvREFCNT_dec(PL_UpperLatin1);
1100 SvREFCNT_dec(PL_Latin1);
1101 SvREFCNT_dec(PL_NonL1NonFinalFold);
1102 SvREFCNT_dec(PL_HasMultiCharFold);
1103 #ifdef USE_LOCALE_CTYPE
1104 SvREFCNT_dec(PL_warn_locale);
1105 #endif
1106 PL_utf8_mark = NULL;
1107 PL_utf8_toupper = NULL;
1108 PL_utf8_totitle = NULL;
1109 PL_utf8_tolower = NULL;
1110 PL_utf8_tofold = NULL;
1111 PL_utf8_idstart = NULL;
1112 PL_utf8_idcont = NULL;
1113 PL_utf8_foldclosures = NULL;
1114 PL_AboveLatin1 = NULL;
1115 PL_InBitmap = NULL;
1116 PL_HasMultiCharFold = NULL;
1117 #ifdef USE_LOCALE_CTYPE
1118 PL_warn_locale = NULL;
1119 #endif
1120 PL_Latin1 = NULL;
1121 PL_NonL1NonFinalFold = NULL;
1122 PL_UpperLatin1 = NULL;
1123 for (i = 0; i < POSIX_CC_COUNT; i++) {
1124 SvREFCNT_dec(PL_XPosix_ptrs[i]);
1125 PL_XPosix_ptrs[i] = NULL;
1126 }
1127 PL_GCB_invlist = NULL;
1128 PL_LB_invlist = NULL;
1129 PL_SB_invlist = NULL;
1130 PL_WB_invlist = NULL;
1131 PL_Assigned_invlist = NULL;
1133 if (!specialWARN(PL_compiling.cop_warnings))
1134 PerlMemShared_free(PL_compiling.cop_warnings);
1135 PL_compiling.cop_warnings = NULL;
1136 cophh_free(CopHINTHASH_get(&PL_compiling));
1137 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1138 CopFILE_free(&PL_compiling);
1140 /* Prepare to destruct main symbol table. */
1142 hv = PL_defstash;
1143 /* break ref loop *:: <=> %:: */
1144 (void)hv_deletes(hv, "main::", G_DISCARD);
1145 PL_defstash = 0;
1146 SvREFCNT_dec(hv);
1147 SvREFCNT_dec(PL_curstname);
1148 PL_curstname = NULL;
1150 /* clear queued errors */
1151 SvREFCNT_dec(PL_errors);
1152 PL_errors = NULL;
1154 SvREFCNT_dec(PL_isarev);
1156 FREETMPS;
1157 if (destruct_level >= 2) {
1158 if (PL_scopestack_ix != 0)
1159 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1160 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1161 (long)PL_scopestack_ix);
1162 if (PL_savestack_ix != 0)
1163 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1164 "Unbalanced saves: %ld more saves than restores\n",
1165 (long)PL_savestack_ix);
1166 if (PL_tmps_floor != -1)
1167 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1168 (long)PL_tmps_floor + 1);
1169 if (cxstack_ix != -1)
1170 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1171 (long)cxstack_ix + 1);
1172 }
1174 #ifdef USE_ITHREADS
1175 SvREFCNT_dec(PL_regex_padav);
1176 PL_regex_padav = NULL;
1177 PL_regex_pad = NULL;
1178 #endif
1180 #ifdef PERL_IMPLICIT_CONTEXT
1181 /* the entries in this list are allocated via SV PVX's, so get freed
1182 * in sv_clean_all */
1183 Safefree(PL_my_cxt_list);
1184 #endif
1186 /* Now absolutely destruct everything, somehow or other, loops or no. */
1188 /* the 2 is for PL_fdpid and PL_strtab */
1189 while (sv_clean_all() > 2)
1190 ;
1192 #ifdef USE_ITHREADS
1193 Safefree(PL_stashpad); /* must come after sv_clean_all */
1194 #endif
1196 AvREAL_off(PL_fdpid); /* no surviving entries */
1197 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1198 PL_fdpid = NULL;
1200 #ifdef HAVE_INTERP_INTERN
1201 sys_intern_clear();
1202 #endif
1204 /* constant strings */
1205 for (i = 0; i < SV_CONSTS_COUNT; i++) {
1206 SvREFCNT_dec(PL_sv_consts[i]);
1207 PL_sv_consts[i] = NULL;
1208 }
1210 /* Destruct the global string table. */
1211 {
1212 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1213 * so that sv_free() won't fail on them.
1214 * Now that the global string table is using a single hunk of memory
1215 * for both HE and HEK, we either need to explicitly unshare it the
1216 * correct way, or actually free things here.
1217 */
1218 I32 riter = 0;
1219 const I32 max = HvMAX(PL_strtab);
1220 HE * const * const array = HvARRAY(PL_strtab);
1221 HE *hent = array[0];
1223 for (;;) {
1224 if (hent && ckWARN_d(WARN_INTERNAL)) {
1225 HE * const next = HeNEXT(hent);
1226 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1227 "Unbalanced string table refcount: (%ld) for \"%s\"",
1228 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1229 Safefree(hent);
1230 hent = next;
1231 }
1232 if (!hent) {
1233 if (++riter > max)
1234 break;
1235 hent = array[riter];
1236 }
1237 }
1239 Safefree(array);
1240 HvARRAY(PL_strtab) = 0;
1241 HvTOTALKEYS(PL_strtab) = 0;
1242 }
1243 SvREFCNT_dec(PL_strtab);
1245 #ifdef USE_ITHREADS
1246 /* free the pointer tables used for cloning */
1247 ptr_table_free(PL_ptr_table);
1248 PL_ptr_table = (PTR_TBL_t*)NULL;
1249 #endif
1251 /* free special SVs */
1253 SvREFCNT(&PL_sv_yes) = 0;
1254 sv_clear(&PL_sv_yes);
1255 SvANY(&PL_sv_yes) = NULL;
1256 SvFLAGS(&PL_sv_yes) = 0;
1258 SvREFCNT(&PL_sv_no) = 0;
1259 sv_clear(&PL_sv_no);
1260 SvANY(&PL_sv_no) = NULL;
1261 SvFLAGS(&PL_sv_no) = 0;
1263 {
1264 int i;
1265 for (i=0; i<=2; i++) {
1266 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1267 sv_clear(PERL_DEBUG_PAD(i));
1268 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1269 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1270 }
1271 }
1273 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1274 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1276 #ifdef DEBUG_LEAKING_SCALARS
1277 if (PL_sv_count != 0) {
1278 SV* sva;
1279 SV* sv;
1280 SV* svend;
1282 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1283 svend = &sva[SvREFCNT(sva)];
1284 for (sv = sva + 1; sv < svend; ++sv) {
1285 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1286 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1287 " flags=0x%"UVxf
1288 " refcnt=%"UVuf pTHX__FORMAT "\n"
1289 "\tallocated at %s:%d %s %s (parent 0x%" UVxf ");"
1290 "serial %" UVuf "\n",
1291 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1292 pTHX__VALUE,
1293 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1294 sv->sv_debug_line,
1295 sv->sv_debug_inpad ? "for" : "by",
1296 sv->sv_debug_optype ?
1297 PL_op_name[sv->sv_debug_optype]: "(none)",
1298 PTR2UV(sv->sv_debug_parent),
1299 sv->sv_debug_serial
1300 );
1301 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1302 Perl_dump_sv_child(aTHX_ sv);
1303 #endif
1304 }
1305 }
1306 }
1307 }
1308 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1309 {
1310 int status;
1311 fd_set rset;
1312 /* Wait for up to 4 seconds for child to terminate.
1313 This seems to be the least effort way of timing out on reaping
1314 its exit status. */
1315 struct timeval waitfor = {4, 0};
1316 int sock = PL_dumper_fd;
1318 shutdown(sock, 1);
1319 FD_ZERO(&rset);
1320 FD_SET(sock, &rset);
1321 select(sock + 1, &rset, NULL, NULL, &waitfor);
1322 waitpid(child, &status, WNOHANG);
1323 close(sock);
1324 }
1325 #endif
1326 #endif
1327 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1328 if (PL_sv_count)
1329 abort();
1330 #endif
1331 PL_sv_count = 0;
1333 #if defined(PERLIO_LAYERS)
1334 /* No more IO - including error messages ! */
1335 PerlIO_cleanup(aTHX);
1336 #endif
1338 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1339 as currently layers use it rather than NULL as a marker
1340 for no arg - and will try and SvREFCNT_dec it.
1341 */
1342 SvREFCNT(&PL_sv_undef) = 0;
1343 SvREADONLY_off(&PL_sv_undef);
1345 Safefree(PL_origfilename);
1346 PL_origfilename = NULL;
1347 Safefree(PL_reg_curpm);
1348 free_tied_hv_pool();
1349 Safefree(PL_op_mask);
1350 Safefree(PL_psig_name);
1351 PL_psig_name = (SV**)NULL;
1352 PL_psig_ptr = (SV**)NULL;
1353 {
1354 /* We need to NULL PL_psig_pend first, so that
1355 signal handlers know not to use it */
1356 int *psig_save = PL_psig_pend;
1357 PL_psig_pend = (int*)NULL;
1358 Safefree(psig_save);
1359 }
1360 nuke_stacks();
1361 TAINTING_set(FALSE);
1362 TAINT_WARN_set(FALSE);
1363 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1365 DEBUG_P(debprofdump());
1367 PL_debug = 0;
1369 #ifdef USE_REENTRANT_API
1370 Perl_reentrant_free(aTHX);
1371 #endif
1373 /* These all point to HVs that are about to be blown away.
1374 Code in core and on CPAN assumes that if the interpreter is re-started
1375 that they will be cleanly NULL or pointing to a valid HV. */
1376 PL_custom_op_names = NULL;
1377 PL_custom_op_descs = NULL;
1378 PL_custom_ops = NULL;
1380 sv_free_arenas();
1382 while (PL_regmatch_slab) {
1383 regmatch_slab *s = PL_regmatch_slab;
1384 PL_regmatch_slab = PL_regmatch_slab->next;
1385 Safefree(s);
1386 }
1388 /* As the absolutely last thing, free the non-arena SV for mess() */
1390 if (PL_mess_sv) {
1391 /* we know that type == SVt_PVMG */
1393 /* it could have accumulated taint magic */
1394 MAGIC* mg;
1395 MAGIC* moremagic;
1396 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1397 moremagic = mg->mg_moremagic;
1398 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1399 && mg->mg_len >= 0)
1400 Safefree(mg->mg_ptr);
1401 Safefree(mg);
1402 }
1404 /* we know that type >= SVt_PV */
1405 SvPV_free(PL_mess_sv);
1406 Safefree(SvANY(PL_mess_sv));
1407 Safefree(PL_mess_sv);
1408 PL_mess_sv = NULL;
1409 }
1410 return STATUS_EXIT;
1411 }
1413 /*
1414 =for apidoc perl_free
1416 Releases a Perl interpreter. See L<perlembed>.
1418 =cut
1419 */
1421 void
1422 perl_free(pTHXx)
1423 {
1424 dVAR;
1426 PERL_ARGS_ASSERT_PERL_FREE;
1428 if (PL_veto_cleanup)
1429 return;
1431 #ifdef PERL_TRACK_MEMPOOL
1432 {
1433 /*
1434 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1435 * value as we're probably hunting memory leaks then
1436 */
1437 if (PL_perl_destruct_level == 0) {
1438 const U32 old_debug = PL_debug;
1439 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1440 thread at thread exit. */
1441 if (DEBUG_m_TEST) {
1442 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1443 "free this thread's memory\n");
1444 PL_debug &= ~ DEBUG_m_FLAG;
1445 }
1446 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header)){
1447 char * next = (char *)(aTHXx->Imemory_debug_header.next);
1448 Malloc_t ptr = PERL_MEMORY_DEBUG_HEADER_SIZE + next;
1449 safesysfree(ptr);
1450 }
1451 PL_debug = old_debug;
1452 }
1453 }
1454 #endif
1456 #if defined(WIN32) || defined(NETWARE)
1457 # if defined(PERL_IMPLICIT_SYS)
1458 {
1459 # ifdef NETWARE
1460 void *host = nw_internal_host;
1461 PerlMem_free(aTHXx);
1462 nw_delete_internal_host(host);
1463 # else
1464 void *host = w32_internal_host;
1465 PerlMem_free(aTHXx);
1466 win32_delete_internal_host(host);
1467 # endif
1468 }
1469 # else
1470 PerlMem_free(aTHXx);
1471 # endif
1472 #else
1473 PerlMem_free(aTHXx);
1474 #endif
1475 }
1477 #if defined(USE_ITHREADS)
1478 /* provide destructors to clean up the thread key when libperl is unloaded */
1479 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1481 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1482 #pragma fini "perl_fini"
1483 #elif defined(__sun) && !defined(__GNUC__)
1484 #pragma fini (perl_fini)
1485 #endif
1487 static void
1488 #if defined(__GNUC__)
1489 __attribute__((destructor))
1490 #endif
1491 perl_fini(void)
1492 {
1493 dVAR;
1494 if (
1495 #ifdef PERL_GLOBAL_STRUCT_PRIVATE
1496 my_vars &&
1497 #endif
1498 PL_curinterp && !PL_veto_cleanup)
1499 FREE_THREAD_KEY;
1500 }
1502 #endif /* WIN32 */
1503 #endif /* THREADS */
1505 void
1506 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1507 {
1508 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1509 PL_exitlist[PL_exitlistlen].fn = fn;
1510 PL_exitlist[PL_exitlistlen].ptr = ptr;
1511 ++PL_exitlistlen;
1512 }
1514 /*
1515 =for apidoc perl_parse
1517 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1519 =cut
1520 */
1522 #define SET_CURSTASH(newstash) \
1523 if (PL_curstash != newstash) { \
1524 SvREFCNT_dec(PL_curstash); \
1525 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1526 }
1528 int
1529 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1530 {
1531 dVAR;
1532 I32 oldscope;
1533 int ret;
1534 dJMPENV;
1536 PERL_ARGS_ASSERT_PERL_PARSE;
1537 #ifndef MULTIPLICITY
1538 PERL_UNUSED_ARG(my_perl);
1539 #endif
1540 #if (defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) || defined(USE_HASH_SEED_DEBUG)) && !defined(NO_PERL_HASH_SEED_DEBUG)
1541 {
1542 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1544 if (s && strEQ(s, "1")) {
1545 const unsigned char *seed= PERL_HASH_SEED;
1546 const unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
1547 PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
1548 while (seed < seed_end) {
1549 PerlIO_printf(Perl_debug_log, "%02x", *seed++);
1550 }
1551 #ifdef PERL_HASH_RANDOMIZE_KEYS
1552 PerlIO_printf(Perl_debug_log, " PERTURB_KEYS = %d (%s)",
1553 PL_HASH_RAND_BITS_ENABLED,
1554 PL_HASH_RAND_BITS_ENABLED == 0 ? "NO" : PL_HASH_RAND_BITS_ENABLED == 1 ? "RANDOM" : "DETERMINISTIC");
1555 #endif
1556 PerlIO_printf(Perl_debug_log, "\n");
1557 }
1558 }
1559 #endif /* #if (defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) ... */
1561 #ifdef __amigaos4__
1562 {
1563 struct NameTranslationInfo nti;
1564 __translate_amiga_to_unix_path_name(&argv[0],&nti);
1565 }
1566 #endif
1568 PL_origargc = argc;
1569 PL_origargv = argv;
1571 if (PL_origalen != 0) {
1572 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1573 }
1574 else {
1575 /* Set PL_origalen be the sum of the contiguous argv[]
1576 * elements plus the size of the env in case that it is
1577 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1578 * as the maximum modifiable length of $0. In the worst case
1579 * the area we are able to modify is limited to the size of
1580 * the original argv[0]. (See below for 'contiguous', though.)
1581 * --jhi */
1582 const char *s = NULL;
1583 int i;
1584 const UV mask = ~(UV)(PTRSIZE-1);
1585 /* Do the mask check only if the args seem like aligned. */
1586 const UV aligned =
1587 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1589 /* See if all the arguments are contiguous in memory. Note
1590 * that 'contiguous' is a loose term because some platforms
1591 * align the argv[] and the envp[]. If the arguments look
1592 * like non-aligned, assume that they are 'strictly' or
1593 * 'traditionally' contiguous. If the arguments look like
1594 * aligned, we just check that they are within aligned
1595 * PTRSIZE bytes. As long as no system has something bizarre
1596 * like the argv[] interleaved with some other data, we are
1597 * fine. (Did I just evoke Murphy's Law?) --jhi */
1598 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1599 while (*s) s++;
1600 for (i = 1; i < PL_origargc; i++) {
1601 if ((PL_origargv[i] == s + 1
1602 #ifdef OS2
1603 || PL_origargv[i] == s + 2
1604 #endif
1605 )
1606 ||
1607 (aligned &&
1608 (PL_origargv[i] > s &&
1609 PL_origargv[i] <=
1610 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1611 )
1612 {
1613 s = PL_origargv[i];
1614 while (*s) s++;
1615 }
1616 else
1617 break;
1618 }
1619 }
1621 #ifndef PERL_USE_SAFE_PUTENV
1622 /* Can we grab env area too to be used as the area for $0? */
1623 if (s && PL_origenviron && !PL_use_safe_putenv) {
1624 if ((PL_origenviron[0] == s + 1)
1625 ||
1626 (aligned &&
1627 (PL_origenviron[0] > s &&
1628 PL_origenviron[0] <=
1629 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1630 )
1631 {
1632 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1633 s = PL_origenviron[0];
1634 while (*s) s++;
1635 #endif
1636 my_setenv("NoNe SuCh", NULL);
1637 /* Force copy of environment. */
1638 for (i = 1; PL_origenviron[i]; i++) {
1639 if (PL_origenviron[i] == s + 1
1640 ||
1641 (aligned &&
1642 (PL_origenviron[i] > s &&
1643 PL_origenviron[i] <=
1644 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1645 )
1646 {
1647 s = PL_origenviron[i];
1648 while (*s) s++;
1649 }
1650 else
1651 break;
1652 }
1653 }
1654 }
1655 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1657 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1658 }
1660 if (PL_do_undump) {
1662 /* Come here if running an undumped a.out. */
1664 PL_origfilename = savepv(argv[0]);
1665 PL_do_undump = FALSE;
1666 cxstack_ix = -1; /* start label stack again */
1667 init_ids();
1668 assert (!TAINT_get);
1669 TAINT;
1670 set_caret_X();
1671 TAINT_NOT;
1672 init_postdump_symbols(argc,argv,env);
1673 return 0;
1674 }
1676 if (PL_main_root) {
1677 op_free(PL_main_root);
1678 PL_main_root = NULL;
1679 }
1680 PL_main_start = NULL;
1681 SvREFCNT_dec(PL_main_cv);
1682 PL_main_cv = NULL;
1684 time(&PL_basetime);
1685 oldscope = PL_scopestack_ix;
1686 PL_dowarn = G_WARN_OFF;
1688 JMPENV_PUSH(ret);
1689 switch (ret) {
1690 case 0:
1691 parse_body(env,xsinit);
1692 if (PL_unitcheckav) {
1693 call_list(oldscope, PL_unitcheckav);
1694 }
1695 if (PL_checkav) {
1696 PERL_SET_PHASE(PERL_PHASE_CHECK);
1697 call_list(oldscope, PL_checkav);
1698 }
1699 ret = 0;
1700 break;
1701 case 1:
1702 STATUS_ALL_FAILURE;
1703 /* FALLTHROUGH */
1704 case 2:
1705 /* my_exit() was called */
1706 while (PL_scopestack_ix > oldscope)
1707 LEAVE;
1708 FREETMPS;
1709 SET_CURSTASH(PL_defstash);
1710 if (PL_unitcheckav) {
1711 call_list(oldscope, PL_unitcheckav);
1712 }
1713 if (PL_checkav) {
1714 PERL_SET_PHASE(PERL_PHASE_CHECK);
1715 call_list(oldscope, PL_checkav);
1716 }
1717 ret = STATUS_EXIT;
1718 break;
1719 case 3:
1720 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1721 ret = 1;
1722 break;
1723 }
1724 JMPENV_POP;
1725 return ret;
1726 }
1728 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1729 miniperl, and we need to see those flags reflected in the values here. */
1731 /* What this returns is subject to change. Use the public interface in Config.
1732 */
1733 static void
1734 S_Internals_V(pTHX_ CV *cv)
1735 {
1736 dXSARGS;
1737 #ifdef LOCAL_PATCH_COUNT
1738 const int local_patch_count = LOCAL_PATCH_COUNT;
1739 #else
1740 const int local_patch_count = 0;
1741 #endif
1742 const int entries = 3 + local_patch_count;
1743 int i;
1744 static const char non_bincompat_options[] =
1745 # ifdef DEBUGGING
1746 " DEBUGGING"
1747 # endif
1748 # ifdef NO_MATHOMS
1749 " NO_MATHOMS"
1750 # endif
1751 # ifdef NO_HASH_SEED
1752 " NO_HASH_SEED"
1753 # endif
1754 # ifdef NO_TAINT_SUPPORT
1755 " NO_TAINT_SUPPORT"
1756 # endif
1757 # ifdef PERL_BOOL_AS_CHAR
1758 " PERL_BOOL_AS_CHAR"
1759 # endif
1760 # ifdef PERL_COPY_ON_WRITE
1761 " PERL_COPY_ON_WRITE"
1762 # endif
1763 # ifdef PERL_DISABLE_PMC
1764 " PERL_DISABLE_PMC"
1765 # endif
1766 # ifdef PERL_DONT_CREATE_GVSV
1767 " PERL_DONT_CREATE_GVSV"
1768 # endif
1769 # ifdef PERL_EXTERNAL_GLOB
1770 " PERL_EXTERNAL_GLOB"
1771 # endif
1772 # ifdef PERL_HASH_FUNC_SIPHASH
1773 " PERL_HASH_FUNC_SIPHASH"
1774 # endif
1775 # ifdef PERL_HASH_FUNC_SDBM
1776 " PERL_HASH_FUNC_SDBM"
1777 # endif
1778 # ifdef PERL_HASH_FUNC_DJB2
1779 " PERL_HASH_FUNC_DJB2"
1780 # endif
1781 # ifdef PERL_HASH_FUNC_SUPERFAST
1782 " PERL_HASH_FUNC_SUPERFAST"
1783 # endif
1784 # ifdef PERL_HASH_FUNC_MURMUR3
1785 " PERL_HASH_FUNC_MURMUR3"
1786 # endif
1787 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME
1788 " PERL_HASH_FUNC_ONE_AT_A_TIME"
1789 # endif
1790 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
1791 " PERL_HASH_FUNC_ONE_AT_A_TIME_HARD"
1792 # endif
1793 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
1794 " PERL_HASH_FUNC_ONE_AT_A_TIME_OLD"
1795 # endif
1796 # ifdef PERL_IS_MINIPERL
1797 " PERL_IS_MINIPERL"
1798 # endif
1799 # ifdef PERL_MALLOC_WRAP
1800 " PERL_MALLOC_WRAP"
1801 # endif
1802 # ifdef PERL_MEM_LOG
1803 " PERL_MEM_LOG"
1804 # endif
1805 # ifdef PERL_MEM_LOG_NOIMPL
1806 " PERL_MEM_LOG_NOIMPL"
1807 # endif
1808 # ifdef PERL_OP_PARENT
1809 " PERL_OP_PARENT"
1810 # endif
1811 # ifdef PERL_PERTURB_KEYS_DETERMINISTIC
1812 " PERL_PERTURB_KEYS_DETERMINISTIC"
1813 # endif
1814 # ifdef PERL_PERTURB_KEYS_DISABLED
1815 " PERL_PERTURB_KEYS_DISABLED"
1816 # endif
1817 # ifdef PERL_PERTURB_KEYS_RANDOM
1818 " PERL_PERTURB_KEYS_RANDOM"
1819 # endif
1820 # ifdef PERL_PRESERVE_IVUV
1821 " PERL_PRESERVE_IVUV"
1822 # endif
1823 # ifdef PERL_RELOCATABLE_INCPUSH
1824 " PERL_RELOCATABLE_INCPUSH"
1825 # endif
1826 # ifdef PERL_USE_DEVEL
1827 " PERL_USE_DEVEL"
1828 # endif
1829 # ifdef PERL_USE_SAFE_PUTENV
1830 " PERL_USE_SAFE_PUTENV"
1831 # endif
1832 # ifdef SILENT_NO_TAINT_SUPPORT
1833 " SILENT_NO_TAINT_SUPPORT"
1834 # endif
1835 # ifdef UNLINK_ALL_VERSIONS
1836 " UNLINK_ALL_VERSIONS"
1837 # endif
1838 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1839 " USE_ATTRIBUTES_FOR_PERLIO"
1840 # endif
1841 # ifdef USE_FAST_STDIO
1842 " USE_FAST_STDIO"
1843 # endif
1844 # ifdef USE_HASH_SEED_EXPLICIT
1845 " USE_HASH_SEED_EXPLICIT"
1846 # endif
1847 # ifdef USE_LOCALE
1848 " USE_LOCALE"
1849 # endif
1850 # ifdef USE_LOCALE_CTYPE
1851 " USE_LOCALE_CTYPE"
1852 # endif
1853 # ifdef WIN32_NO_REGISTRY
1854 " USE_NO_REGISTRY"
1855 # endif
1856 # ifdef USE_PERL_ATOF
1857 " USE_PERL_ATOF"
1858 # endif
1859 # ifdef USE_SITECUSTOMIZE
1860 " USE_SITECUSTOMIZE"
1861 # endif
1862 ;
1863 PERL_UNUSED_ARG(cv);
1864 PERL_UNUSED_VAR(items);
1866 EXTEND(SP, entries);
1868 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1869 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1870 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1872 #ifndef PERL_BUILD_DATE
1873 # ifdef __DATE__
1874 # ifdef __TIME__
1875 # define PERL_BUILD_DATE __DATE__ " " __TIME__
1876 # else
1877 # define PERL_BUILD_DATE __DATE__
1878 # endif
1879 # endif
1880 #endif
1882 #ifdef PERL_BUILD_DATE
1883 PUSHs(Perl_newSVpvn_flags(aTHX_
1884 STR_WITH_LEN("Compiled at " PERL_BUILD_DATE),
1885 SVs_TEMP));
1886 #else
1887 PUSHs(&PL_sv_undef);
1888 #endif
1890 for (i = 1; i <= local_patch_count; i++) {
1891 /* This will be an undef, if PL_localpatches[i] is NULL. */
1892 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1893 }
1895 XSRETURN(entries);
1896 }
1898 #define INCPUSH_UNSHIFT 0x01
1899 #define INCPUSH_ADD_OLD_VERS 0x02
1900 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1901 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1902 #define INCPUSH_NOT_BASEDIR 0x10
1903 #define INCPUSH_CAN_RELOCATE 0x20
1904 #define INCPUSH_ADD_SUB_DIRS \
1905 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1907 STATIC void *
1908 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1909 {
1910 dVAR;
1911 PerlIO *rsfp;
1912 int argc = PL_origargc;
1913 char **argv = PL_origargv;
1914 const char *scriptname = NULL;
1915 bool dosearch = FALSE;
1916 char c;
1917 bool doextract = FALSE;
1918 const char *cddir = NULL;
1919 #ifdef USE_SITECUSTOMIZE
1920 bool minus_f = FALSE;
1921 #endif
1922 SV *linestr_sv = NULL;
1923 bool add_read_e_script = FALSE;
1924 U32 lex_start_flags = 0;
1926 PERL_SET_PHASE(PERL_PHASE_START);
1928 init_main_stash();
1930 {
1931 const char *s;
1932 for (argc--,argv++; argc > 0; argc--,argv++) {
1933 if (argv[0][0] != '-' || !argv[0][1])
1934 break;
1935 s = argv[0]+1;
1936 reswitch:
1937 switch ((c = *s)) {
1938 case 'C':
1939 #ifndef PERL_STRICT_CR
1940 case '\r':
1941 #endif
1942 case ' ':
1943 case '0':
1944 case 'F':
1945 case 'a':
1946 case 'c':
1947 case 'd':
1948 case 'D':
1949 case 'h':
1950 case 'i':
1951 case 'l':
1952 case 'M':
1953 case 'm':
1954 case 'n':
1955 case 'p':
1956 case 's':
1957 case 'u':
1958 case 'U':
1959 case 'v':
1960 case 'W':
1961 case 'X':
1962 case 'w':
1963 if ((s = moreswitches(s)))
1964 goto reswitch;
1965 break;
1967 case 't':
1968 #if defined(SILENT_NO_TAINT_SUPPORT)
1969 /* silently ignore */
1970 #elif defined(NO_TAINT_SUPPORT)
1971 Perl_croak_nocontext("This perl was compiled without taint support. "
1972 "Cowardly refusing to run with -t or -T flags");
1973 #else
1974 CHECK_MALLOC_TOO_LATE_FOR('t');
1975 if( !TAINTING_get ) {
1976 TAINT_WARN_set(TRUE);
1977 TAINTING_set(TRUE);
1978 }
1979 #endif
1980 s++;
1981 goto reswitch;
1982 case 'T':
1983 #if defined(SILENT_NO_TAINT_SUPPORT)
1984 /* silently ignore */
1985 #elif defined(NO_TAINT_SUPPORT)
1986 Perl_croak_nocontext("This perl was compiled without taint support. "
1987 "Cowardly refusing to run with -t or -T flags");
1988 #else
1989 CHECK_MALLOC_TOO_LATE_FOR('T');
1990 TAINTING_set(TRUE);
1991 TAINT_WARN_set(FALSE);
1992 #endif
1993 s++;
1994 goto reswitch;
1996 case 'E':
1997 PL_minus_E = TRUE;
1998 /* FALLTHROUGH */
1999 case 'e':
2000 forbid_setid('e', FALSE);
2001 if (!PL_e_script) {
2002 PL_e_script = newSVpvs("");
2003 add_read_e_script = TRUE;
2004 }
2005 if (*++s)
2006 sv_catpv(PL_e_script, s);
2007 else if (argv[1]) {
2008 sv_catpv(PL_e_script, argv[1]);
2009 argc--,argv++;
2010 }
2011 else
2012 Perl_croak(aTHX_ "No code specified for -%c", c);
2013 sv_catpvs(PL_e_script, "\n");
2014 break;
2016 case 'f':
2017 #ifdef USE_SITECUSTOMIZE
2018 minus_f = TRUE;
2019 #endif
2020 s++;
2021 goto reswitch;
2023 case 'I': /* -I handled both here and in moreswitches() */
2024 forbid_setid('I', FALSE);
2025 if (!*++s && (s=argv[1]) != NULL) {
2026 argc--,argv++;
2027 }
2028 if (s && *s) {
2029 STRLEN len = strlen(s);
2030 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
2031 }
2032 else
2033 Perl_croak(aTHX_ "No directory specified for -I");
2034 break;
2035 case 'S':
2036 forbid_setid('S', FALSE);
2037 dosearch = TRUE;
2038 s++;
2039 goto reswitch;
2040 case 'V':
2041 {
2042 SV *opts_prog;
2044 if (*++s != ':') {
2045 opts_prog = newSVpvs("use Config; Config::_V()");
2046 }
2047 else {
2048 ++s;
2049 opts_prog = Perl_newSVpvf(aTHX_
2050 "use Config; Config::config_vars(qw%c%s%c)",
2051 0, s, 0);
2052 s += strlen(s);
2053 }
2054 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
2055 /* don't look for script or read stdin */
2056 scriptname = BIT_BUCKET;
2057 goto reswitch;
2058 }
2059 case 'x':
2060 doextract = TRUE;
2061 s++;
2062 if (*s)
2063 cddir = s;
2064 break;
2065 case 0:
2066 break;
2067 case '-':
2068 if (!*++s || isSPACE(*s)) {
2069 argc--,argv++;
2070 goto switch_end;
2071 }
2072 /* catch use of gnu style long options.
2073 Both of these exit immediately. */
2074 if (strEQ(s, "version"))
2075 minus_v();
2076 if (strEQ(s, "help"))
2077 usage();
2078 s--;
2079 /* FALLTHROUGH */
2080 default:
2081 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2082 }
2083 }
2084 }
2086 switch_end:
2088 {
2089 char *s;
2091 if (
2092 #ifndef SECURE_INTERNAL_GETENV
2093 !TAINTING_get &&
2094 #endif
2095 (s = PerlEnv_getenv("PERL5OPT")))
2096 {
2097 /* s points to static memory in getenv(), which may be overwritten at
2098 * any time; use a mortal copy instead */
2099 s = SvPVX(sv_2mortal(newSVpv(s, 0)));
2101 while (isSPACE(*s))
2102 s++;
2103 if (*s == '-' && *(s+1) == 'T') {
2104 #if defined(SILENT_NO_TAINT_SUPPORT)
2105 /* silently ignore */
2106 #elif defined(NO_TAINT_SUPPORT)
2107 Perl_croak_nocontext("This perl was compiled without taint support. "
2108 "Cowardly refusing to run with -t or -T flags");
2109 #else
2110 CHECK_MALLOC_TOO_LATE_FOR('T');
2111 TAINTING_set(TRUE);
2112 TAINT_WARN_set(FALSE);
2113 #endif
2114 }
2115 else {
2116 char *popt_copy = NULL;
2117 while (s && *s) {
2118 const char *d;
2119 while (isSPACE(*s))
2120 s++;
2121 if (*s == '-') {
2122 s++;
2123 if (isSPACE(*s))
2124 continue;
2125 }
2126 d = s;
2127 if (!*s)
2128 break;
2129 if (!strchr("CDIMUdmtwW", *s))
2130 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2131 while (++s && *s) {
2132 if (isSPACE(*s)) {
2133 if (!popt_copy) {
2134 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2135 s = popt_copy + (s - d);
2136 d = popt_copy;
2137 }
2138 *s++ = '\0';
2139 break;
2140 }
2141 }
2142 if (*d == 't') {
2143 #if defined(SILENT_NO_TAINT_SUPPORT)
2144 /* silently ignore */
2145 #elif defined(NO_TAINT_SUPPORT)
2146 Perl_croak_nocontext("This perl was compiled without taint support. "
2147 "Cowardly refusing to run with -t or -T flags");
2148 #else
2149 if( !TAINTING_get) {
2150 TAINT_WARN_set(TRUE);
2151 TAINTING_set(TRUE);
2152 }
2153 #endif
2154 } else {
2155 moreswitches(d);
2156 }
2157 }
2158 }
2159 }
2160 }
2162 /* Set $^X early so that it can be used for relocatable paths in @INC */
2163 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2164 assert (!TAINT_get);
2165 TAINT;
2166 set_caret_X();
2167 TAINT_NOT;
2169 #if defined(USE_SITECUSTOMIZE)
2170 if (!minus_f) {
2171 /* The games with local $! are to avoid setting errno if there is no
2172 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2173 ie a q() operator with a NUL byte as a the delimiter. This avoids
2174 problems with pathnames containing (say) ' */
2175 # ifdef PERL_IS_MINIPERL
2176 AV *const inc = GvAV(PL_incgv);
2177 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2179 if (inc0) {
2180 /* if lib/buildcustomize.pl exists, it should not fail. If it does,
2181 it should be reported immediately as a build failure. */
2182 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2183 Perl_newSVpvf(aTHX_
2184 "BEGIN { my $f = q%c%s%" SVf "/buildcustomize.pl%c; "
2185 "do {local $!; -f $f }"
2186 " and do $f || die $@ || qq '$f: $!' }",
2187 0, (TAINTING_get ? "./" : ""), SVfARG(*inc0), 0));
2188 }
2189 # else
2190 /* SITELIB_EXP is a function call on Win32. */
2191 const char *const raw_sitelib = SITELIB_EXP;
2192 if (raw_sitelib) {
2193 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2194 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2195 INCPUSH_CAN_RELOCATE);
2196 const char *const sitelib = SvPVX(sitelib_sv);
2197 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2198 Perl_newSVpvf(aTHX_
2199 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2200 0, SVfARG(sitelib), 0,
2201 0, SVfARG(sitelib), 0));
2202 assert (SvREFCNT(sitelib_sv) == 1);
2203 SvREFCNT_dec(sitelib_sv);
2204 }
2205 # endif
2206 }
2207 #endif
2209 if (!scriptname)
2210 scriptname = argv[0];
2211 if (PL_e_script) {
2212 argc++,argv--;
2213 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2214 }
2215 else if (scriptname == NULL) {
2216 #ifdef MSDOS
2217 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2218 moreswitches("h");
2219 #endif
2220 scriptname = "-";
2221 }
2223 assert (!TAINT_get);
2224 init_perllib();
2226 {
2227 bool suidscript = FALSE;
2229 rsfp = open_script(scriptname, dosearch, &suidscript);
2230 if (!rsfp) {
2231 rsfp = PerlIO_stdin();
2232 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2233 }
2235 validate_suid(rsfp);
2237 #ifndef PERL_MICRO
2238 # if defined(SIGCHLD) || defined(SIGCLD)
2239 {
2240 # ifndef SIGCHLD
2241 # define SIGCHLD SIGCLD
2242 # endif
2243 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2244 if (sigstate == (Sighandler_t) SIG_IGN) {
2245 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2246 "Can't ignore signal CHLD, forcing to default");
2247 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2248 }
2249 }
2250 # endif
2251 #endif
2253 if (doextract) {
2255 /* This will croak if suidscript is true, as -x cannot be used with
2256 setuid scripts. */
2257 forbid_setid('x', suidscript);
2258 /* Hence you can't get here if suidscript is true */
2260 linestr_sv = newSV_type(SVt_PV);
2261 lex_start_flags |= LEX_START_COPIED;
2262 find_beginning(linestr_sv, rsfp);
2263 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2264 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2265 }
2266 }
2268 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2269 CvUNIQUE_on(PL_compcv);
2271 CvPADLIST_set(PL_compcv, pad_new(0));
2273 PL_isarev = newHV();
2275 boot_core_PerlIO();
2276 boot_core_UNIVERSAL();
2277 boot_core_mro();
2278 newXS("Internals::V", S_Internals_V, __FILE__);
2280 if (xsinit)
2281 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2282 #ifndef PERL_MICRO
2283 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(SYMBIAN)
2284 init_os_extras();
2285 #endif
2286 #endif
2288 #ifdef USE_SOCKS
2289 # ifdef HAS_SOCKS5_INIT
2290 socks5_init(argv[0]);
2291 # else
2292 SOCKSinit(argv[0]);
2293 # endif
2294 #endif
2296 init_predump_symbols();
2297 /* init_postdump_symbols not currently designed to be called */
2298 /* more than once (ENV isn't cleared first, for example) */
2299 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2300 if (!PL_do_undump)
2301 init_postdump_symbols(argc,argv,env);
2303 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2304 * or explicitly in some platforms.
2305 * PL_utf8locale is conditionally turned on by
2306 * locale.c:Perl_init_i18nl10n() if the environment
2307 * look like the user wants to use UTF-8. */
2308 #if defined(__SYMBIAN32__)
2309 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2310 #endif
2311 # ifndef PERL_IS_MINIPERL
2312 if (PL_unicode) {
2313 /* Requires init_predump_symbols(). */
2314 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2315 IO* io;
2316 PerlIO* fp;
2317 SV* sv;
2319 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2320 * and the default open disciplines. */
2321 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2322 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2323 (fp = IoIFP(io)))
2324 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2325 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2326 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2327 (fp = IoOFP(io)))
2328 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2329 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2330 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2331 (fp = IoOFP(io)))
2332 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2333 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2334 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2335 SVt_PV)))) {
2336 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2337 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2338 if (in) {
2339 if (out)
2340 sv_setpvs(sv, ":utf8\0:utf8");
2341 else
2342 sv_setpvs(sv, ":utf8\0");
2343 }
2344 else if (out)
2345 sv_setpvs(sv, "\0:utf8");
2346 SvSETMAGIC(sv);
2347 }
2348 }
2349 }
2350 #endif
2352 {
2353 const char *s;
2354 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2355 if (strEQ(s, "unsafe"))
2356 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2357 else if (strEQ(s, "safe"))
2358 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2359 else
2360 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2361 }
2362 }
2365 lex_start(linestr_sv, rsfp, lex_start_flags);
2366 SvREFCNT_dec(linestr_sv);
2368 PL_subname = newSVpvs("main");
2370 if (add_read_e_script)
2371 filter_add(read_e_script, NULL);
2373 /* now parse the script */
2375 SETERRNO(0,SS_NORMAL);
2376 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2377 abort_execution("", PL_origfilename);
2378 }
2379 CopLINE_set(PL_curcop, 0);
2380 SET_CURSTASH(PL_defstash);
2381 if (PL_e_script) {
2382 SvREFCNT_dec(PL_e_script);
2383 PL_e_script = NULL;
2384 }
2386 if (PL_do_undump)
2387 my_unexec();
2389 if (isWARN_ONCE) {
2390 SAVECOPFILE(PL_curcop);
2391 SAVECOPLINE(PL_curcop);
2392 gv_check(PL_defstash);
2393 }
2395 LEAVE;
2396 FREETMPS;
2398 #ifdef MYMALLOC
2399 {
2400 const char *s;
2401 UV uv;
2402 s = PerlEnv_getenv("PERL_DEBUG_MSTATS");
2403 if (s && grok_atoUV(s, &uv, NULL) && uv >= 2)
2404 dump_mstats("after compilation:");
2405 }
2406 #endif
2408 ENTER;
2409 PL_restartjmpenv = NULL;
2410 PL_restartop = 0;
2411 return NULL;
2412 }
2414 /*
2415 =for apidoc perl_run
2417 Tells a Perl interpreter to run. See L<perlembed>.
2419 =cut
2420 */
2422 int
2423 perl_run(pTHXx)
2424 {
2425 I32 oldscope;
2426 int ret = 0;
2427 dJMPENV;
2429 PERL_ARGS_ASSERT_PERL_RUN;
2430 #ifndef MULTIPLICITY
2431 PERL_UNUSED_ARG(my_perl);
2432 #endif
2434 oldscope = PL_scopestack_ix;
2435 #ifdef VMS
2436 VMSISH_HUSHED = 0;
2437 #endif
2439 JMPENV_PUSH(ret);
2440 switch (ret) {
2441 case 1:
2442 cxstack_ix = -1; /* start context stack again */
2443 goto redo_body;
2444 case 0: /* normal completion */
2445 redo_body:
2446 run_body(oldscope);
2447 /* FALLTHROUGH */
2448 case 2: /* my_exit() */
2449 while (PL_scopestack_ix > oldscope)
2450 LEAVE;
2451 FREETMPS;
2452 SET_CURSTASH(PL_defstash);
2453 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2454 PL_endav && !PL_minus_c) {
2455 PERL_SET_PHASE(PERL_PHASE_END);
2456 call_list(oldscope, PL_endav);
2457 }
2458 #ifdef MYMALLOC
2459 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2460 dump_mstats("after execution: ");
2461 #endif
2462 ret = STATUS_EXIT;
2463 break;
2464 case 3:
2465 if (PL_restartop) {
2466 POPSTACK_TO(PL_mainstack);
2467 goto redo_body;
2468 }
2469 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2470 FREETMPS;
2471 ret = 1;
2472 break;
2473 }
2475 JMPENV_POP;
2476 return ret;
2477 }
2479 STATIC void
2480 S_run_body(pTHX_ I32 oldscope)
2481 {
2482 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2483 PL_sawampersand ? "Enabling" : "Omitting",
2484 (unsigned int)(PL_sawampersand)));
2486 if (!PL_restartop) {
2487 #ifdef DEBUGGING
2488 if (DEBUG_x_TEST || DEBUG_B_TEST)
2489 dump_all_perl(!DEBUG_B_TEST);
2490 if (!DEBUG_q_TEST)
2491 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2492 #endif
2494 if (PL_minus_c) {
2495 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2496 my_exit(0);
2497 }
2498 if (PERLDB_SINGLE && PL_DBsingle)
2499 PL_DBsingle_iv = 1;
2500 if (PL_initav) {
2501 PERL_SET_PHASE(PERL_PHASE_INIT);
2502 call_list(oldscope, PL_initav);
2503 }
2504 #ifdef PERL_DEBUG_READONLY_OPS
2505 if (PL_main_root && PL_main_root->op_slabbed)
2506 Slab_to_ro(OpSLAB(PL_main_root));
2507 #endif
2508 }
2510 /* do it */
2512 PERL_SET_PHASE(PERL_PHASE_RUN);
2514 if (PL_restartop) {
2515 PL_restartjmpenv = NULL;
2516 PL_op = PL_restartop;
2517 PL_restartop = 0;
2518 CALLRUNOPS(aTHX);
2519 }
2520 else if (PL_main_start) {
2521 CvDEPTH(PL_main_cv) = 1;
2522 PL_op = PL_main_start;
2523 CALLRUNOPS(aTHX);
2524 }
2525 my_exit(0);
2526 NOT_REACHED; /* NOTREACHED */
2527 }
2529 /*
2530 =head1 SV Manipulation Functions
2532 =for apidoc p||get_sv
2534 Returns the SV of the specified Perl scalar. C<flags> are passed to
2535 C<gv_fetchpv>. If C<GV_ADD> is set and the
2536 Perl variable does not exist then it will be created. If C<flags> is zero
2537 and the variable does not exist then NULL is returned.
2539 =cut
2540 */
2542 SV*
2543 Perl_get_sv(pTHX_ const char *name, I32 flags)
2544 {
2545 GV *gv;
2547 PERL_ARGS_ASSERT_GET_SV;
2549 gv = gv_fetchpv(name, flags, SVt_PV);
2550 if (gv)
2551 return GvSV(gv);
2552 return NULL;
2553 }
2555 /*
2556 =head1 Array Manipulation Functions
2558 =for apidoc p||get_av
2560 Returns the AV of the specified Perl global or package array with the given
2561 name (so it won't work on lexical variables). C<flags> are passed
2562 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2563 Perl variable does not exist then it will be created. If C<flags> is zero
2564 and the variable does not exist then NULL is returned.
2566 Perl equivalent: C<@{"$name"}>.
2568 =cut
2569 */
2571 AV*
2572 Perl_get_av(pTHX_ const char *name, I32 flags)
2573 {
2574 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2576 PERL_ARGS_ASSERT_GET_AV;
2578 if (flags)
2579 return GvAVn(gv);
2580 if (gv)
2581 return GvAV(gv);
2582 return NULL;
2583 }
2585 /*
2586 =head1 Hash Manipulation Functions
2588 =for apidoc p||get_hv
2590 Returns the HV of the specified Perl hash. C<flags> are passed to
2591 C<gv_fetchpv>. If C<GV_ADD> is set and the
2592 Perl variable does not exist then it will be created. If C<flags> is zero
2593 and the variable does not exist then C<NULL> is returned.
2595 =cut
2596 */
2598 HV*
2599 Perl_get_hv(pTHX_ const char *name, I32 flags)
2600 {
2601 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2603 PERL_ARGS_ASSERT_GET_HV;
2605 if (flags)
2606 return GvHVn(gv);
2607 if (gv)
2608 return GvHV(gv);
2609 return NULL;
2610 }
2612 /*
2613 =head1 CV Manipulation Functions
2615 =for apidoc p||get_cvn_flags
2617 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2618 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2619 exist then it will be declared (which has the same effect as saying
2620 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2621 then NULL is returned.
2623 =for apidoc p||get_cv
2625 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2627 =cut
2628 */
2630 CV*
2631 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2632 {
2633 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2635 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2637 /* XXX this is probably not what they think they're getting.
2638 * It has the same effect as "sub name;", i.e. just a forward
2639 * declaration! */
2640 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2641 return newSTUB(gv,0);
2642 }
2643 if (gv)
2644 return GvCVu(gv);
2645 return NULL;
2646 }
2648 /* Nothing in core calls this now, but we can't replace it with a macro and
2649 move it to mathoms.c as a macro would evaluate name twice. */
2650 CV*
2651 Perl_get_cv(pTHX_ const char *name, I32 flags)
2652 {
2653 PERL_ARGS_ASSERT_GET_CV;
2655 return get_cvn_flags(name, strlen(name), flags);
2656 }
2658 /* Be sure to refetch the stack pointer after calling these routines. */
2660 /*
2662 =head1 Callback Functions
2664 =for apidoc p||call_argv
2666 Performs a callback to the specified named and package-scoped Perl subroutine
2667 with C<argv> (a C<NULL>-terminated array of strings) as arguments. See
2668 L<perlcall>.
2670 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2672 =cut
2673 */
2675 I32
2676 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2678 /* See G_* flags in cop.h */
2679 /* null terminated arg list */
2680 {
2681 dSP;
2683 PERL_ARGS_ASSERT_CALL_ARGV;
2685 PUSHMARK(SP);
2686 while (*argv) {
2687 mXPUSHs(newSVpv(*argv,0));
2688 argv++;
2689 }
2690 PUTBACK;
2691 return call_pv(sub_name, flags);
2692 }
2694 /*
2695 =for apidoc p||call_pv
2697 Performs a callback to the specified Perl sub. See L<perlcall>.
2699 =cut
2700 */
2702 I32
2703 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2704 /* name of the subroutine */
2705 /* See G_* flags in cop.h */
2706 {
2707 PERL_ARGS_ASSERT_CALL_PV;
2709 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2710 }
2712 /*
2713 =for apidoc p||call_method
2715 Performs a callback to the specified Perl method. The blessed object must
2716 be on the stack. See L<perlcall>.
2718 =cut
2719 */
2721 I32
2722 Perl_call_method(pTHX_ const char *methname, I32 flags)
2723 /* name of the subroutine */
2724 /* See G_* flags in cop.h */
2725 {
2726 STRLEN len;
2727 SV* sv;
2728 PERL_ARGS_ASSERT_CALL_METHOD;
2730 len = strlen(methname);
2731 sv = flags & G_METHOD_NAMED
2732 ? sv_2mortal(newSVpvn_share(methname, len,0))
2733 : newSVpvn_flags(methname, len, SVs_TEMP);
2735 return call_sv(sv, flags | G_METHOD);
2736 }
2738 /* May be called with any of a CV, a GV, or an SV containing the name. */
2739 /*
2740 =for apidoc p||call_sv
2742 Performs a callback to the Perl sub specified by the SV.
2744 If neither the C<G_METHOD> nor C<G_METHOD_NAMED> flag is supplied, the
2745 SV may be any of a CV, a GV, a reference to a CV, a reference to a GV
2746 or C<SvPV(sv)> will be used as the name of the sub to call.
2748 If the C<G_METHOD> flag is supplied, the SV may be a reference to a CV or
2749 C<SvPV(sv)> will be used as the name of the method to call.
2751 If the C<G_METHOD_NAMED> flag is supplied, C<SvPV(sv)> will be used as
2752 the name of the method to call.
2754 Some other values are treated specially for internal use and should
2755 not be depended on.
2757 See L<perlcall>.
2759 =cut
2760 */
2762 I32
2763 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2764 /* See G_* flags in cop.h */
2765 {
2766 dVAR;
2767 LOGOP myop; /* fake syntax tree node */
2768 METHOP method_op;
2769 I32 oldmark;
2770 VOL I32 retval = 0;
2771 bool oldcatch = CATCH_GET;
2772 int ret;
2773 OP* const oldop = PL_op;
2774 dJMPENV;
2776 PERL_ARGS_ASSERT_CALL_SV;
2778 if (flags & G_DISCARD) {
2779 ENTER;
2780 SAVETMPS;
2781 }
2782 if (!(flags & G_WANT)) {
2783 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2784 */
2785 flags |= G_SCALAR;
2786 }
2788 Zero(&myop, 1, LOGOP);
2789 if (!(flags & G_NOARGS))
2790 myop.op_flags |= OPf_STACKED;
2791 myop.op_flags |= OP_GIMME_REVERSE(flags);
2792 SAVEOP();
2793 PL_op = (OP*)&myop;
2795 if (!(flags & G_METHOD_NAMED)) {
2796 dSP;
2797 EXTEND(SP, 1);
2798 PUSHs(sv);
2799 PUTBACK;
2800 }
2801 oldmark = TOPMARK;
2803 if (PERLDB_SUB && PL_curstash != PL_debstash
2804 /* Handle first BEGIN of -d. */
2805 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2806 /* Try harder, since this may have been a sighandler, thus
2807 * curstash may be meaningless. */
2808 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2809 && !(flags & G_NODEBUG))
2810 myop.op_private |= OPpENTERSUB_DB;
2812 if (flags & (G_METHOD|G_METHOD_NAMED)) {
2813 Zero(&method_op, 1, METHOP);
2814 method_op.op_next = (OP*)&myop;
2815 PL_op = (OP*)&method_op;
2816 if ( flags & G_METHOD_NAMED ) {
2817 method_op.op_ppaddr = PL_ppaddr[OP_METHOD_NAMED];
2818 method_op.op_type = OP_METHOD_NAMED;
2819 method_op.op_u.op_meth_sv = sv;
2820 } else {
2821 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2822 method_op.op_type = OP_METHOD;
2823 }
2824 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2825 myop.op_type = OP_ENTERSUB;
2826 }
2828 if (!(flags & G_EVAL)) {
2829 CATCH_SET(TRUE);
2830 CALL_BODY_SUB((OP*)&myop);
2831 retval = PL_stack_sp - (PL_stack_base + oldmark);
2832 CATCH_SET(oldcatch);
2833 }
2834 else {
2835 I32 old_cxix;
2836 myop.op_other = (OP*)&myop;
2837 (void)POPMARK;
2838 old_cxix = cxstack_ix;
2839 create_eval_scope(NULL, flags|G_FAKINGEVAL);
2840 INCMARK;
2842 JMPENV_PUSH(ret);
2844 switch (ret) {
2845 case 0:
2846 redo_body:
2847 CALL_BODY_SUB((OP*)&myop);
2848 retval = PL_stack_sp - (PL_stack_base + oldmark);
2849 if (!(flags & G_KEEPERR)) {
2850 CLEAR_ERRSV();
2851 }
2852 break;
2853 case 1:
2854 STATUS_ALL_FAILURE;
2855 /* FALLTHROUGH */
2856 case 2:
2857 /* my_exit() was called */
2858 SET_CURSTASH(PL_defstash);
2859 FREETMPS;
2860 JMPENV_POP;
2861 my_exit_jump();
2862 NOT_REACHED; /* NOTREACHED */
2863 case 3:
2864 if (PL_restartop) {
2865 PL_restartjmpenv = NULL;
2866 PL_op = PL_restartop;
2867 PL_restartop = 0;
2868 goto redo_body;
2869 }
2870 PL_stack_sp = PL_stack_base + oldmark;
2871 if ((flags & G_WANT) == G_ARRAY)
2872 retval = 0;
2873 else {
2874 retval = 1;
2875 *++PL_stack_sp = &PL_sv_undef;
2876 }
2877 break;
2878 }
2880 /* if we croaked, depending on how we croaked the eval scope
2881 * may or may not have already been popped */
2882 if (cxstack_ix > old_cxix) {
2883 assert(cxstack_ix == old_cxix + 1);
2884 assert(CxTYPE(CX_CUR()) == CXt_EVAL);
2885 delete_eval_scope();
2886 }
2887 JMPENV_POP;
2888 }
2890 if (flags & G_DISCARD) {
2891 PL_stack_sp = PL_stack_base + oldmark;
2892 retval = 0;
2893 FREETMPS;
2894 LEAVE;
2895 }
2896 PL_op = oldop;
2897 return retval;
2898 }
2900 /* Eval a string. The G_EVAL flag is always assumed. */
2902 /*
2903 =for apidoc p||eval_sv
2905 Tells Perl to C<eval> the string in the SV. It supports the same flags
2906 as C<call_sv>, with the obvious exception of C<G_EVAL>. See L<perlcall>.
2908 =cut
2909 */
2911 I32
2912 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2914 /* See G_* flags in cop.h */
2915 {
2916 dVAR;
2917 UNOP myop; /* fake syntax tree node */
2918 VOL I32 oldmark;
2919 VOL I32 retval = 0;
2920 int ret;
2921 OP* const oldop = PL_op;
2922 dJMPENV;
2924 PERL_ARGS_ASSERT_EVAL_SV;
2926 if (flags & G_DISCARD) {
2927 ENTER;
2928 SAVETMPS;
2929 }
2931 SAVEOP();
2932 PL_op = (OP*)&myop;
2933 Zero(&myop, 1, UNOP);
2934 {
2935 dSP;
2936 oldmark = SP - PL_stack_base;
2937 EXTEND(SP, 1);
2938 PUSHs(sv);
2939 PUTBACK;
2940 }
2942 if (!(flags & G_NOARGS))
2943 myop.op_flags = OPf_STACKED;
2944 myop.op_type = OP_ENTEREVAL;
2945 myop.op_flags |= OP_GIMME_REVERSE(flags);
2946 if (flags & G_KEEPERR)
2947 myop.op_flags |= OPf_SPECIAL;
2949 if (flags & G_RE_REPARSING)
2950 myop.op_private = (OPpEVAL_COPHH | OPpEVAL_RE_REPARSING);
2952 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2953 * before a cx_pusheval(), which corrupts the stack after a croak */
2954 TAINT_PROPER("eval_sv()");
2956 JMPENV_PUSH(ret);
2957 switch (ret) {
2958 case 0:
2959 redo_body:
2960 if (PL_op == (OP*)(&myop)) {
2961 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2962 if (!PL_op)
2963 goto fail; /* failed in compilation */
2964 }
2965 CALLRUNOPS(aTHX);
2966 retval = PL_stack_sp - (PL_stack_base + oldmark);
2967 if (!(flags & G_KEEPERR)) {
2968 CLEAR_ERRSV();
2969 }
2970 break;
2971 case 1:
2972 STATUS_ALL_FAILURE;
2973 /* FALLTHROUGH */
2974 case 2:
2975 /* my_exit() was called */
2976 SET_CURSTASH(PL_defstash);
2977 FREETMPS;
2978 JMPENV_POP;
2979 my_exit_jump();
2980 NOT_REACHED; /* NOTREACHED */
2981 case 3:
2982 if (PL_restartop) {
2983 PL_restartjmpenv = NULL;
2984 PL_op = PL_restartop;
2985 PL_restartop = 0;
2986 goto redo_body;
2987 }
2988 fail:
2989 PL_stack_sp = PL_stack_base + oldmark;
2990 if ((flags & G_WANT) == G_ARRAY)
2991 retval = 0;
2992 else {
2993 retval = 1;
2994 *++PL_stack_sp = &PL_sv_undef;
2995 }
2996 break;
2997 }
2999 JMPENV_POP;
3000 if (flags & G_DISCARD) {
3001 PL_stack_sp = PL_stack_base + oldmark;
3002 retval = 0;
3003 FREETMPS;
3004 LEAVE;
3005 }
3006 PL_op = oldop;
3007 return retval;
3008 }
3010 /*
3011 =for apidoc p||eval_pv
3013 Tells Perl to C<eval> the given string in scalar context and return an SV* result.
3015 =cut
3016 */
3018 SV*
3019 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
3020 {
3021 SV* sv = newSVpv(p, 0);
3023 PERL_ARGS_ASSERT_EVAL_PV;
3025 eval_sv(sv, G_SCALAR);
3026 SvREFCNT_dec(sv);
3028 {
3029 dSP;
3030 sv = POPs;
3031 PUTBACK;
3032 }
3034 /* just check empty string or undef? */
3035 if (croak_on_error) {
3036 SV * const errsv = ERRSV;
3037 if(SvTRUE_NN(errsv))
3038 /* replace with croak_sv? */
3039 Perl_croak_nocontext("%s", SvPV_nolen_const(errsv));
3040 }
3042 return sv;
3043 }
3045 /* Require a module. */
3047 /*
3048 =head1 Embedding Functions
3050 =for apidoc p||require_pv
3052 Tells Perl to C<require> the file named by the string argument. It is
3053 analogous to the Perl code C<eval "require '$file'">. It's even
3054 implemented that way; consider using load_module instead.
3056 =cut */
3058 void
3059 Perl_require_pv(pTHX_ const char *pv)
3060 {
3061 dSP;
3062 SV* sv;
3064 PERL_ARGS_ASSERT_REQUIRE_PV;
3066 PUSHSTACKi(PERLSI_REQUIRE);
3067 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
3068 eval_sv(sv_2mortal(sv), G_DISCARD);
3069 POPSTACK;
3070 }
3072 STATIC void
3073 S_usage(pTHX) /* XXX move this out into a module ? */
3074 {
3075 /* This message really ought to be max 23 lines.
3076 * Removed -h because the user already knows that option. Others? */
3078 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
3079 minimum of 509 character string literals. */
3080 static const char * const usage_msg[] = {
3081 " -0[octal] specify record separator (\\0, if no argument)\n"
3082 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
3083 " -C[number/list] enables the listed Unicode features\n"
3084 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
3085 " -d[:debugger] run program under debugger\n"
3086 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
3087 " -e program one line of program (several -e's allowed, omit programfile)\n"
3088 " -E program like -e, but enables all optional features\n"
3089 " -f don't do $sitelib/sitecustomize.pl at startup\n"
3090 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
3091 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
3092 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
3093 " -l[octal] enable line ending processing, specifies line terminator\n"
3094 " -[mM][-]module execute \"use/no module...\" before executing program\n"
3095 " -n assume \"while (<>) { ... }\" loop around program\n"
3096 " -p assume loop like -n but print line also, like sed\n"
3097 " -s enable rudimentary parsing for switches after programfile\n"
3098 " -S look for programfile using PATH environment variable\n",
3099 " -t enable tainting warnings\n"
3100 " -T enable tainting checks\n"
3101 " -u dump core after parsing program\n"
3102 " -U allow unsafe operations\n"
3103 " -v print version, patchlevel and license\n"
3104 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
3105 " -w enable many useful warnings\n"
3106 " -W enable all warnings\n"
3107 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
3108 " -X disable all warnings\n"
3109 " \n"
3110 "Run 'perldoc perl' for more help with Perl.\n\n",
3111 NULL
3112 };
3113 const char * const *p = usage_msg;
3114 PerlIO *out = PerlIO_stdout();
3116 PerlIO_printf(out,
3117 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
3118 PL_origargv[0]);
3119 while (*p)
3120 PerlIO_puts(out, *p++);
3121 my_exit(0);
3122 }
3124 /* convert a string of -D options (or digits) into an int.
3125 * sets *s to point to the char after the options */
3127 #ifdef DEBUGGING
3128 int
3129 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
3130 {
3131 static const char * const usage_msgd[] = {
3132 " Debugging flag values: (see also -d)\n"
3133 " p Tokenizing and parsing (with v, displays parse stack)\n"
3134 " s Stack snapshots (with v, displays all stacks)\n"
3135 " l Context (loop) stack processing\n"
3136 " t Trace execution\n"
3137 " o Method and overloading resolution\n",
3138 " c String/numeric conversions\n"
3139 " P Print profiling info, source file input state\n"
3140 " m Memory and SV allocation\n"
3141 " f Format processing\n"
3142 " r Regular expression parsing and execution\n"
3143 " x Syntax tree dump\n",
3144 " u Tainting checks\n"
3145 " H Hash dump -- usurps values()\n"
3146 " X Scratchpad allocation\n"
3147 " D Cleaning up\n"
3148 " S Op slab allocation\n"
3149 " T Tokenising\n"
3150 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3151 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3152 " v Verbose: use in conjunction with other flags\n"
3153 " C Copy On Write\n"
3154 " A Consistency checks on internal structures\n"
3155 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3156 " M trace smart match resolution\n"
3157 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3158 " L trace some locale setting information--for Perl core development\n",
3159 " i trace PerlIO layer processing\n",
3160 NULL
3161 };
3162 UV uv = 0;
3164 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3166 if (isALPHA(**s)) {
3167 /* if adding extra options, remember to update DEBUG_MASK */
3168 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMBLi";
3170 for (; isWORDCHAR(**s); (*s)++) {
3171 const char * const d = strchr(debopts,**s);
3172 if (d)
3173 uv |= 1 << (d - debopts);
3174 else if (ckWARN_d(WARN_DEBUGGING))
3175 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3176 "invalid option -D%c, use -D'' to see choices\n", **s);
3177 }
3178 }
3179 else if (isDIGIT(**s)) {
3180 const char* e;
3181 if (grok_atoUV(*s, &uv, &e))
3182 *s = e;
3183 for (; isWORDCHAR(**s); (*s)++) ;
3184 }
3185 else if (givehelp) {
3186 const char *const *p = usage_msgd;
3187 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3188 }
3189 return (int)uv; /* ignore any UV->int conversion loss */
3190 }
3191 #endif
3193 /* This routine handles any switches that can be given during run */
3195 const char *
3196 Perl_moreswitches(pTHX_ const char *s)
3197 {
3198 dVAR;
3199 UV rschar;
3200 const char option = *s; /* used to remember option in -m/-M code */
3202 PERL_ARGS_ASSERT_MORESWITCHES;
3204 switch (*s) {
3205 case '0':
3206 {
3207 I32 flags = 0;
3208 STRLEN numlen;
3210 SvREFCNT_dec(PL_rs);
3211 if (s[1] == 'x' && s[2]) {
3212 const char *e = s+=2;
3213 U8 *tmps;
3215 while (*e)
3216 e++;
3217 numlen = e - s;
3218 flags = PERL_SCAN_SILENT_ILLDIGIT;
3219 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3220 if (s + numlen < e) {
3221 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3222 numlen = 0;
3223 s--;
3224 }
3225 PL_rs = newSVpvs("");
3226 tmps = (U8*) SvGROW(PL_rs, (STRLEN)(UVCHR_SKIP(rschar) + 1));
3227 uvchr_to_utf8(tmps, rschar);
3228 SvCUR_set(PL_rs, UVCHR_SKIP(rschar));
3229 SvUTF8_on(PL_rs);
3230 }
3231 else {
3232 numlen = 4;
3233 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3234 if (rschar & ~((U8)~0))
3235 PL_rs = &PL_sv_undef;
3236 else if (!rschar && numlen >= 2)
3237 PL_rs = newSVpvs("");
3238 else {
3239 char ch = (char)rschar;
3240 PL_rs = newSVpvn(&ch, 1);
3241 }
3242 }
3243 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3244 return s + numlen;
3245 }
3246 case 'C':
3247 s++;
3248 PL_unicode = parse_unicode_opts( (const char **)&s );
3249 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3250 PL_utf8cache = -1;
3251 return s;
3252 case 'F':
3253 PL_minus_a = TRUE;
3254 PL_minus_F = TRUE;
3255 PL_minus_n = TRUE;
3256 PL_splitstr = ++s;
3257 while (*s && !isSPACE(*s)) ++s;
3258 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3259 return s;
3260 case 'a':
3261 PL_minus_a = TRUE;
3262 PL_minus_n = TRUE;
3263 s++;
3264 return s;
3265 case 'c':
3266 PL_minus_c = TRUE;
3267 s++;
3268 return s;
3269 case 'd':
3270 forbid_setid('d', FALSE);
3271 s++;
3273 /* -dt indicates to the debugger that threads will be used */
3274 if (*s == 't' && !isWORDCHAR(s[1])) {
3275 ++s;
3276 my_setenv("PERL5DB_THREADED", "1");
3277 }
3279 /* The following permits -d:Mod to accepts arguments following an =
3280 in the fashion that -MSome::Mod does. */
3281 if (*s == ':' || *s == '=') {
3282 const char *start;
3283 const char *end;
3284 SV *sv;
3286 if (*++s == '-') {
3287 ++s;
3288 sv = newSVpvs("no Devel::");
3289 } else {
3290 sv = newSVpvs("use Devel::");
3291 }
3293 start = s;
3294 end = s + strlen(s);
3296 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3297 while(isWORDCHAR(*s) || *s==':') ++s;
3298 if (*s != '=')
3299 sv_catpvn(sv, start, end - start);
3300 else {
3301 sv_catpvn(sv, start, s-start);
3302 /* Don't use NUL as q// delimiter here, this string goes in the
3303 * environment. */
3304 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3305 }
3306 s = end;
3307 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3308 SvREFCNT_dec(sv);
3309 }
3310 if (!PL_perldb) {
3311 PL_perldb = PERLDB_ALL;
3312 init_debugger();
3313 }
3314 return s;
3315 case 'D':
3316 {
3317 #ifdef DEBUGGING
3318 forbid_setid('D', FALSE);
3319 s++;
3320 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3321 #else /* !DEBUGGING */
3322 if (ckWARN_d(WARN_DEBUGGING))
3323 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3324 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3325 for (s++; isWORDCHAR(*s); s++) ;
3326 #endif
3327 return s;
3328 NOT_REACHED; /* NOTREACHED */
3329 }
3330 case 'h':
3331 usage();
3332 NOT_REACHED; /* NOTREACHED */
3334 case 'i':
3335 Safefree(PL_inplace);
3336 #if defined(__CYGWIN__) /* do backup extension automagically */
3337 if (*(s+1) == '\0') {
3338 PL_inplace = savepvs(".bak");
3339 return s+1;
3340 }
3341 #endif /* __CYGWIN__ */
3342 {
3343 const char * const start = ++s;
3344 while (*s && !isSPACE(*s))
3345 ++s;
3347 PL_inplace = savepvn(start, s - start);
3348 }
3349 return s;
3350 case 'I': /* -I handled both here and in parse_body() */
3351 forbid_setid('I', FALSE);
3352 ++s;
3353 while (*s && isSPACE(*s))
3354 ++s;
3355 if (*s) {
3356 const char *e, *p;
3357 p = s;
3358 /* ignore trailing spaces (possibly followed by other switches) */
3359 do {
3360 for (e = p; *e && !isSPACE(*e); e++) ;
3361 p = e;
3362 while (isSPACE(*p))
3363 p++;
3364 } while (*p && *p != '-');
3365 incpush(s, e-s,
3366 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3367 s = p;
3368 if (*s == '-')
3369 s++;
3370 }
3371 else
3372 Perl_croak(aTHX_ "No directory specified for -I");
3373 return s;
3374 case 'l':
3375 PL_minus_l = TRUE;
3376 s++;
3377 if (PL_ors_sv) {
3378 SvREFCNT_dec(PL_ors_sv);
3379 PL_ors_sv = NULL;
3380 }
3381 if (isDIGIT(*s)) {
3382 I32 flags = 0;
3383 STRLEN numlen;
3384 PL_ors_sv = newSVpvs("\n");
3385 numlen = 3 + (*s == '0');
3386 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3387 s += numlen;
3388 }
3389 else {
3390 if (RsPARA(PL_rs)) {
3391 PL_ors_sv = newSVpvs("\n\n");
3392 }
3393 else {
3394 PL_ors_sv = newSVsv(PL_rs);
3395 }
3396 }
3397 return s;
3398 case 'M':
3399 forbid_setid('M', FALSE); /* XXX ? */
3400 /* FALLTHROUGH */
3401 case 'm':
3402 forbid_setid('m', FALSE); /* XXX ? */
3403 if (*++s) {
3404 const char *start;
3405 const char *end;
3406 SV *sv;
3407 const char *use = "use ";
3408 bool colon = FALSE;
3409 /* -M-foo == 'no foo' */
3410 /* Leading space on " no " is deliberate, to make both
3411 possibilities the same length. */
3412 if (*s == '-') { use = " no "; ++s; }
3413 sv = newSVpvn(use,4);
3414 start = s;
3415 /* We allow -M'Module qw(Foo Bar)' */
3416 while(isWORDCHAR(*s) || *s==':') {
3417 if( *s++ == ':' ) {
3418 if( *s == ':' )
3419 s++;
3420 else
3421 colon = TRUE;
3422 }
3423 }
3424 if (s == start)
3425 Perl_croak(aTHX_ "Module name required with -%c option",
3426 option);
3427 if (colon)
3428 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3429 "contains single ':'",
3430 (int)(s - start), start, option);
3431 end = s + strlen(s);
3432 if (*s != '=') {
3433 sv_catpvn(sv, start, end - start);
3434 if (option == 'm') {
3435 if (*s != '\0')
3436 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3437 sv_catpvs( sv, " ()");
3438 }
3439 } else {
3440 sv_catpvn(sv, start, s-start);
3441 /* Use NUL as q''-delimiter. */
3442 sv_catpvs(sv, " split(/,/,q\0");
3443 ++s;
3444 sv_catpvn(sv, s, end - s);
3445 sv_catpvs(sv, "\0)");
3446 }
3447 s = end;
3448 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3449 }
3450 else
3451 Perl_croak(aTHX_ "Missing argument to -%c", option);
3452 return s;
3453 case 'n':
3454 PL_minus_n = TRUE;
3455 s++;
3456 return s;
3457 case 'p':
3458 PL_minus_p = TRUE;
3459 s++;
3460 return s;
3461 case 's':
3462 forbid_setid('s', FALSE);
3463 PL_doswitches = TRUE;
3464 s++;
3465 return s;
3466 case 't':
3467 case 'T':
3468 #if defined(SILENT_NO_TAINT_SUPPORT)
3469 /* silently ignore */
3470 #elif defined(NO_TAINT_SUPPORT)
3471 Perl_croak_nocontext("This perl was compiled without taint support. "
3472 "Cowardly refusing to run with -t or -T flags");
3473 #else
3474 if (!TAINTING_get)
3475 TOO_LATE_FOR(*s);
3476 #endif
3477 s++;
3478 return s;
3479 case 'u':
3480 PL_do_undump = TRUE;
3481 s++;
3482 return s;
3483 case 'U':
3484 PL_unsafe = TRUE;
3485 s++;
3486 return s;
3487 case 'v':
3488 minus_v();
3489 case 'w':
3490 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3491 PL_dowarn |= G_WARN_ON;
3492 }
3493 s++;
3494 return s;
3495 case 'W':
3496 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3497 if (!specialWARN(PL_compiling.cop_warnings))
3498 PerlMemShared_free(PL_compiling.cop_warnings);
3499 PL_compiling.cop_warnings = pWARN_ALL ;
3500 s++;
3501 return s;
3502 case 'X':
3503 PL_dowarn = G_WARN_ALL_OFF;
3504 if (!specialWARN(PL_compiling.cop_warnings))
3505 PerlMemShared_free(PL_compiling.cop_warnings);
3506 PL_compiling.cop_warnings = pWARN_NONE ;
3507 s++;
3508 return s;
3509 case '*':
3510 case ' ':
3511 while( *s == ' ' )
3512 ++s;
3513 if (s[0] == '-') /* Additional switches on #! line. */
3514 return s+1;
3515 break;
3516 case '-':
3517 case 0:
3518 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3519 case '\r':
3520 #endif
3521 case '\n':
3522 case '\t':
3523 break;
3524 #ifdef ALTERNATE_SHEBANG
3525 case 'S': /* OS/2 needs -S on "extproc" line. */
3526 break;
3527 #endif
3528 case 'e': case 'f': case 'x': case 'E':
3529 #ifndef ALTERNATE_SHEBANG
3530 case 'S':
3531 #endif
3532 case 'V':
3533 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3534 default:
3535 Perl_croak(aTHX_
3536 "Unrecognized switch: -%.1s (-h will show valid options)",s
3537 );
3538 }
3539 return NULL;
3540 }
3543 STATIC void
3544 S_minus_v(pTHX)
3545 {
3546 PerlIO * PIO_stdout;
3547 {
3548 const char * const level_str = "v" PERL_VERSION_STRING;
3549 const STRLEN level_len = sizeof("v" PERL_VERSION_STRING)-1;
3550 #ifdef PERL_PATCHNUM
3551 SV* level;
3552 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3553 static const char num [] = PERL_PATCHNUM "*";
3554 # else
3555 static const char num [] = PERL_PATCHNUM;
3556 # endif
3557 {
3558 const STRLEN num_len = sizeof(num)-1;
3559 /* A very advanced compiler would fold away the strnEQ
3560 and this whole conditional, but most (all?) won't do it.
3561 SV level could also be replaced by with preprocessor
3562 catenation.
3563 */
3564 if (num_len >= level_len && strnEQ(num,level_str,level_len)) {
3565 /* per 46807d8e80, PERL_PATCHNUM is outside of the control
3566 of the interp so it might contain format characters
3567 */
3568 level = newSVpvn(num, num_len);
3569 } else {
3570 level = Perl_newSVpvf_nocontext("%s (%s)", level_str, num);
3571 }
3572 }
3573 #else
3574 SV* level = newSVpvn(level_str, level_len);
3575 #endif /* #ifdef PERL_PATCHNUM */
3576 PIO_stdout = PerlIO_stdout();
3577 PerlIO_printf(PIO_stdout,
3578 "\nThis is perl " STRINGIFY(PERL_REVISION)
3579 ", version " STRINGIFY(PERL_VERSION)
3580 ", subversion " STRINGIFY(PERL_SUBVERSION)
3581 " (%" SVf ") built for " ARCHNAME, SVfARG(level)
3582 );
3583 SvREFCNT_dec_NN(level);
3584 }
3585 #if defined(LOCAL_PATCH_COUNT)
3586 if (LOCAL_PATCH_COUNT > 0)
3587 PerlIO_printf(PIO_stdout,
3588 "\n(with %d registered patch%s, "
3589 "see perl -V for more detail)",
3590 LOCAL_PATCH_COUNT,
3591 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3592 #endif
3594 PerlIO_printf(PIO_stdout,
3595 "\n\nCopyright 1987-2017, Larry Wall\n");
3596 #ifdef MSDOS
3597 PerlIO_printf(PIO_stdout,
3598 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3599 #endif
3600 #ifdef DJGPP
3601 PerlIO_printf(PIO_stdout,
3602 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3603 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3604 #endif
3605 #ifdef OS2
3606 PerlIO_printf(PIO_stdout,
3607 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3608 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3609 #endif
3610 #ifdef OEMVS
3611 PerlIO_printf(PIO_stdout,
3612 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3613 #endif
3614 #ifdef __VOS__
3615 PerlIO_printf(PIO_stdout,
3616 "Stratus OpenVOS port by Paul.Green@stratus.com, 1997-2013\n");
3617 #endif
3618 #ifdef POSIX_BC
3619 PerlIO_printf(PIO_stdout,
3620 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3621 #endif
3622 #ifdef UNDER_CE
3623 PerlIO_printf(PIO_stdout,
3624 "WINCE port by Rainer Keuchel, 2001-2002\n"
3625 "Built on " __DATE__ " " __TIME__ "\n\n");
3626 wce_hitreturn();
3627 #endif
3628 #ifdef __SYMBIAN32__
3629 PerlIO_printf(PIO_stdout,
3630 "Symbian port by Nokia, 2004-2005\n");
3631 #endif
3632 #ifdef BINARY_BUILD_NOTICE
3633 BINARY_BUILD_NOTICE;
3634 #endif
3635 PerlIO_printf(PIO_stdout,
3636 "\n\
3637 Perl may be copied only under the terms of either the Artistic License or the\n\
3638 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3639 Complete documentation for Perl, including FAQ lists, should be found on\n\
3640 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3641 Internet, point your browser at https://www.perl.org/, the Perl Home Page.\n\n");
3642 my_exit(0);
3643 }
3645 /* compliments of Tom Christiansen */
3647 /* unexec() can be found in the Gnu emacs distribution */
3648 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3650 #ifdef VMS
3651 #include <lib$routines.h>
3652 #endif
3654 void
3655 Perl_my_unexec(pTHX)
3656 {
3657 #ifdef UNEXEC
3658 SV * prog = newSVpv(BIN_EXP, 0);
3659 SV * file = newSVpv(PL_origfilename, 0);
3660 int status = 1;
3661 extern int etext;
3663 sv_catpvs(prog, "/perl");
3664 sv_catpvs(file, ".perldump");
3666 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3667 /* unexec prints msg to stderr in case of failure */
3668 PerlProc_exit(status);
3669 #else
3670 PERL_UNUSED_CONTEXT;
3671 # ifdef VMS
3672 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3673 # elif defined(WIN32) || defined(__CYGWIN__)
3674 Perl_croak_nocontext("dump is not supported");
3675 # else
3676 ABORT(); /* for use with undump */
3677 # endif
3678 #endif
3679 }
3681 /* initialize curinterp */
3682 STATIC void
3683 S_init_interp(pTHX)
3684 {
3685 #ifdef MULTIPLICITY
3686 # define PERLVAR(prefix,var,type)
3687 # define PERLVARA(prefix,var,n,type)
3688 # if defined(PERL_IMPLICIT_CONTEXT)
3689 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3690 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3691 # else
3692 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3693 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3694 # endif
3695 # include "intrpvar.h"
3696 # undef PERLVAR
3697 # undef PERLVARA
3698 # undef PERLVARI
3699 # undef PERLVARIC
3700 #else
3701 # define PERLVAR(prefix,var,type)
3702 # define PERLVARA(prefix,var,n,type)
3703 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3704 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3705 # include "intrpvar.h"
3706 # undef PERLVAR
3707 # undef PERLVARA
3708 # undef PERLVARI
3709 # undef PERLVARIC
3710 #endif
3712 }
3714 STATIC void
3715 S_init_main_stash(pTHX)
3716 {
3717 GV *gv;
3719 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(newHV());
3720 /* We know that the string "main" will be in the global shared string
3721 table, so it's a small saving to use it rather than allocate another
3722 8 bytes. */
3723 PL_curstname = newSVpvs_share("main");
3724 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3725 /* If we hadn't caused another reference to "main" to be in the shared
3726 string table above, then it would be worth reordering these two,
3727 because otherwise all we do is delete "main" from it as a consequence
3728 of the SvREFCNT_dec, only to add it again with hv_name_set */
3729 SvREFCNT_dec(GvHV(gv));
3730 hv_name_sets(PL_defstash, "main", 0);
3731 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3732 SvREADONLY_on(gv);
3733 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3734 SVt_PVAV)));
3735 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3736 GvMULTI_on(PL_incgv);
3737 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3738 SvREFCNT_inc_simple_void(PL_hintgv);
3739 GvMULTI_on(PL_hintgv);
3740 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3741 SvREFCNT_inc_simple_void(PL_defgv);
3742 PL_errgv = gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV);
3743 SvREFCNT_inc_simple_void(PL_errgv);
3744 GvMULTI_on(PL_errgv);
3745 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3746 SvREFCNT_inc_simple_void(PL_replgv);
3747 GvMULTI_on(PL_replgv);
3748 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3749 #ifdef PERL_DONT_CREATE_GVSV
3750 (void)gv_SVadd(PL_errgv);
3751 #endif
3752 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3753 CLEAR_ERRSV();
3754 SET_CURSTASH(PL_defstash);
3755 CopSTASH_set(&PL_compiling, PL_defstash);
3756 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3757 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3758 SVt_PVHV));
3759 /* We must init $/ before switches are processed. */
3760 sv_setpvs(get_sv("/", GV_ADD), "\n");
3761 }
3763 STATIC PerlIO *
3764 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3765 {
3766 int fdscript = -1;
3767 PerlIO *rsfp = NULL;
3768 Stat_t tmpstatbuf;
3769 int fd;
3771 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3773 if (PL_e_script) {
3774 PL_origfilename = savepvs("-e");
3775 }
3776 else {
3777 const char *s;
3778 UV uv;
3779 /* if find_script() returns, it returns a malloc()-ed value */
3780 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3782 if (strEQs(scriptname, "/dev/fd/")
3783 && isDIGIT(scriptname[8])
3784 && grok_atoUV(scriptname + 8, &uv, &s)
3785 && uv <= PERL_INT_MAX
3786 ) {
3787 fdscript = (int)uv;
3788 if (*s) {
3789 /* PSz 18 Feb 04
3790 * Tell apart "normal" usage of fdscript, e.g.
3791 * with bash on FreeBSD:
3792 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3793 * from usage in suidperl.
3794 * Does any "normal" usage leave garbage after the number???
3795 * Is it a mistake to use a similar /dev/fd/ construct for
3796 * suidperl?
3797 */
3798 *suidscript = TRUE;
3799 /* PSz 20 Feb 04
3800 * Be supersafe and do some sanity-checks.
3801 * Still, can we be sure we got the right thing?
3802 */
3803 if (*s != '/') {
3804 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3805 }
3806 if (! *(s+1)) {
3807 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3808 }
3809 scriptname = savepv(s + 1);
3810 Safefree(PL_origfilename);
3811 PL_origfilename = (char *)scriptname;
3812 }
3813 }
3814 }
3816 CopFILE_free(PL_curcop);
3817 CopFILE_set(PL_curcop, PL_origfilename);
3818 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3819 scriptname = (char *)"";
3820 if (fdscript >= 0) {
3821 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3822 }
3823 else if (!*scriptname) {
3824 forbid_setid(0, *suidscript);
3825 return NULL;
3826 }
3827 else {
3828 #ifdef FAKE_BIT_BUCKET
3829 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3830 * is called) and still have the "-e" work. (Believe it or not,
3831 * a /dev/null is required for the "-e" to work because source
3832 * filter magic is used to implement it. ) This is *not* a general
3833 * replacement for a /dev/null. What we do here is create a temp
3834 * file (an empty file), open up that as the script, and then
3835 * immediately close and unlink it. Close enough for jazz. */
3836 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3837 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3838 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3839 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3840 FAKE_BIT_BUCKET_TEMPLATE
3841 };
3842 const char * const err = "Failed to create a fake bit bucket";
3843 if (strEQ(scriptname, BIT_BUCKET)) {
3844 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3845 int old_umask = umask(0177);
3846 int tmpfd = mkstemp(tmpname);
3847 umask(old_umask);
3848 if (tmpfd > -1) {
3849 scriptname = tmpname;
3850 close(tmpfd);
3851 } else
3852 Perl_croak(aTHX_ err);
3853 #else
3854 # ifdef HAS_MKTEMP
3855 scriptname = mktemp(tmpname);
3856 if (!scriptname)
3857 Perl_croak(aTHX_ err);
3858 # endif
3859 #endif
3860 }
3861 #endif
3862 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3863 #ifdef FAKE_BIT_BUCKET
3864 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3865 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3866 && strlen(scriptname) == sizeof(tmpname) - 1) {
3867 unlink(scriptname);
3868 }
3869 scriptname = BIT_BUCKET;
3870 #endif
3871 }
3872 if (!rsfp) {
3873 /* PSz 16 Sep 03 Keep neat error message */
3874 if (PL_e_script)
3875 Perl_croak(aTHX_ "Can't open " BIT_BUCKET ": %s\n", Strerror(errno));
3876 else
3877 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3878 CopFILE(PL_curcop), Strerror(errno));
3879 }
3880 fd = PerlIO_fileno(rsfp);
3881 #if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
3882 if (fd >= 0) {
3883 /* ensure close-on-exec */
3884 if (fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) {
3885 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3886 CopFILE(PL_curcop), Strerror(errno));
3887 }
3888 }
3889 #endif
3891 if (fd < 0 ||
3892 (PerlLIO_fstat(fd, &tmpstatbuf) >= 0
3893 && S_ISDIR(tmpstatbuf.st_mode)))
3894 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3895 CopFILE(PL_curcop),
3896 Strerror(EISDIR));
3898 return rsfp;
3899 }
3901 /* Mention
3902 * I_SYSSTATVFS HAS_FSTATVFS
3903 * I_SYSMOUNT
3904 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3905 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3906 * here so that metaconfig picks them up. */
3909 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3910 /* Don't even need this function. */
3911 #else
3912 STATIC void
3913 S_validate_suid(pTHX_ PerlIO *rsfp)
3914 {
3915 const Uid_t my_uid = PerlProc_getuid();
3916 const Uid_t my_euid = PerlProc_geteuid();
3917 const Gid_t my_gid = PerlProc_getgid();
3918 const Gid_t my_egid = PerlProc_getegid();
3920 PERL_ARGS_ASSERT_VALIDATE_SUID;
3922 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
3923 dVAR;
3924 int fd = PerlIO_fileno(rsfp);
3925 Stat_t statbuf;
3926 if (fd < 0 || PerlLIO_fstat(fd, &statbuf) < 0) { /* may be either wrapped or real suid */
3927 Perl_croak_nocontext( "Illegal suidscript");
3928 }
3929 if ((my_euid != my_uid && my_euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
3930 ||
3931 (my_egid != my_gid && my_egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
3932 )
3933 if (!PL_do_undump)
3934 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3935 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3936 /* not set-id, must be wrapped */
3937 }
3938 }
3939 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3941 STATIC void
3942 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3943 {
3944 const char *s;
3945 const char *s2;
3947 PERL_ARGS_ASSERT_FIND_BEGINNING;
3949 /* skip forward in input to the real script? */
3951 do {
3952 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3953 Perl_croak(aTHX_ "No Perl script found in input\n");
3954 s2 = s;
3955 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3956 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3957 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3958 s2 = s;
3959 while (*s == ' ' || *s == '\t') s++;
3960 if (*s++ == '-') {
3961 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3962 || s2[-1] == '_') s2--;
3963 if (strEQs(s2-4,"perl"))
3964 while ((s = moreswitches(s)))
3965 ;
3966 }
3967 }
3970 STATIC void
3971 S_init_ids(pTHX)
3972 {
3973 /* no need to do anything here any more if we don't
3974 * do tainting. */
3975 #ifndef NO_TAINT_SUPPORT
3976 const Uid_t my_uid = PerlProc_getuid();
3977 const Uid_t my_euid = PerlProc_geteuid();
3978 const Gid_t my_gid = PerlProc_getgid();
3979 const Gid_t my_egid = PerlProc_getegid();
3981 PERL_UNUSED_CONTEXT;
3983 /* Should not happen: */
3984 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
3985 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
3986 #endif
3987 /* BUG */
3988 /* PSz 27 Feb 04
3989 * Should go by suidscript, not uid!=euid: why disallow
3990 * system("ls") in scripts run from setuid things?
3991 * Or, is this run before we check arguments and set suidscript?
3992 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3993 * (We never have suidscript, can we be sure to have fdscript?)
3994 * Or must then go by UID checks? See comments in forbid_setid also.
3995 */
3996 }
3998 /* This is used very early in the lifetime of the program,
3999 * before even the options are parsed, so PL_tainting has
4000 * not been initialized properly. */
4001 bool
4002 Perl_doing_taint(int argc, char *argv[], char *envp[])
4003 {
4004 #ifndef PERL_IMPLICIT_SYS
4005 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4006 * before we have an interpreter-- and the whole point of this
4007 * function is to be called at such an early stage. If you are on
4008 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4009 * "tainted because running with altered effective ids', you'll
4010 * have to add your own checks somewhere in here. The two most
4011 * known samples of 'implicitness' are Win32 and NetWare, neither
4012 * of which has much of concept of 'uids'. */
4013 Uid_t uid = PerlProc_getuid();
4014 Uid_t euid = PerlProc_geteuid();
4015 Gid_t gid = PerlProc_getgid();
4016 Gid_t egid = PerlProc_getegid();
4017 (void)envp;
4019 #ifdef VMS
4020 uid |= gid << 16;
4021 euid |= egid << 16;
4022 #endif
4023 if (uid && (euid != uid || egid != gid))
4024 return 1;
4025 #endif /* !PERL_IMPLICIT_SYS */
4026 /* This is a really primitive check; environment gets ignored only
4027 * if -T are the first chars together; otherwise one gets
4028 * "Too late" message. */
4029 if ( argc > 1 && argv[1][0] == '-'
4030 && isALPHA_FOLD_EQ(argv[1][1], 't'))
4031 return 1;
4032 return 0;
4033 }
4035 /* Passing the flag as a single char rather than a string is a slight space
4036 optimisation. The only message that isn't /^-.$/ is
4037 "program input from stdin", which is substituted in place of '\0', which
4038 could never be a command line flag. */
4039 STATIC void
4040 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4041 {
4042 char string[3] = "-x";
4043 const char *message = "program input from stdin";
4045 PERL_UNUSED_CONTEXT;
4046 if (flag) {
4047 string[1] = flag;
4048 message = string;
4049 }
4051 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4052 if (PerlProc_getuid() != PerlProc_geteuid())
4053 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4054 if (PerlProc_getgid() != PerlProc_getegid())
4055 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4056 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4057 if (suidscript)
4058 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4059 }
4061 void
4062 Perl_init_dbargs(pTHX)
4063 {
4064 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
4065 GV_ADDMULTI,
4066 SVt_PVAV))));
4068 if (AvREAL(args)) {
4069 /* Someone has already created it.
4070 It might have entries, and if we just turn off AvREAL(), they will
4071 "leak" until global destruction. */
4072 av_clear(args);
4073 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
4074 Perl_croak(aTHX_ "Cannot set tied @DB::args");
4075 }
4076 AvREIFY_only(PL_dbargs);
4077 }
4079 void
4080 Perl_init_debugger(pTHX)
4081 {
4082 HV * const ostash = PL_curstash;
4083 MAGIC *mg;
4085 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
4087 Perl_init_dbargs(aTHX);
4088 PL_DBgv = MUTABLE_GV(
4089 SvREFCNT_inc(gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV))
4090 );
4091 PL_DBline = MUTABLE_GV(
4092 SvREFCNT_inc(gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV))
4093 );
4094 PL_DBsub = MUTABLE_GV(SvREFCNT_inc(
4095 gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV))
4096 ));
4097 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4098 if (!SvIOK(PL_DBsingle))
4099 sv_setiv(PL_DBsingle, 0);
4100 mg = sv_magicext(PL_DBsingle, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4101 mg->mg_private = DBVARMG_SINGLE;
4102 SvSETMAGIC(PL_DBsingle);
4104 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4105 if (!SvIOK(PL_DBtrace))
4106 sv_setiv(PL_DBtrace, 0);
4107 mg = sv_magicext(PL_DBtrace, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4108 mg->mg_private = DBVARMG_TRACE;
4109 SvSETMAGIC(PL_DBtrace);
4111 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4112 if (!SvIOK(PL_DBsignal))
4113 sv_setiv(PL_DBsignal, 0);
4114 mg = sv_magicext(PL_DBsignal, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4115 mg->mg_private = DBVARMG_SIGNAL;
4116 SvSETMAGIC(PL_DBsignal);
4118 SvREFCNT_dec(PL_curstash);
4119 PL_curstash = ostash;
4120 }
4122 #ifndef STRESS_REALLOC
4123 #define REASONABLE(size) (size)
4124 #define REASONABLE_but_at_least(size,min) (size)
4125 #else
4126 #define REASONABLE(size) (1) /* unreasonable */
4127 #define REASONABLE_but_at_least(size,min) (min)
4128 #endif
4130 void
4131 Perl_init_stacks(pTHX)
4132 {
4133 SSize_t size;
4135 /* start with 128-item stack and 8K cxstack */
4136 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4137 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4138 PL_curstackinfo->si_type = PERLSI_MAIN;
4139 PL_curstack = PL_curstackinfo->si_stack;
4140 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4142 PL_stack_base = AvARRAY(PL_curstack);
4143 PL_stack_sp = PL_stack_base;
4144 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4146 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4147 PL_tmps_floor = -1;
4148 PL_tmps_ix = -1;
4149 PL_tmps_max = REASONABLE(128);
4151 Newx(PL_markstack,REASONABLE(32),I32);
4152 PL_markstack_ptr = PL_markstack;
4153 PL_markstack_max = PL_markstack + REASONABLE(32);
4155 SET_MARK_OFFSET;
4157 Newx(PL_scopestack,REASONABLE(32),I32);
4158 #ifdef DEBUGGING
4159 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4160 #endif
4161 PL_scopestack_ix = 0;
4162 PL_scopestack_max = REASONABLE(32);
4164 size = REASONABLE_but_at_least(128,SS_MAXPUSH);
4165 Newx(PL_savestack, size, ANY);
4166 PL_savestack_ix = 0;
4167 /*PL_savestack_max lies: it always has SS_MAXPUSH more than it claims */
4168 PL_savestack_max = size - SS_MAXPUSH;
4169 }
4171 #undef REASONABLE
4173 STATIC void
4174 S_nuke_stacks(pTHX)
4175 {
4176 while (PL_curstackinfo->si_next)
4177 PL_curstackinfo = PL_curstackinfo->si_next;
4178 while (PL_curstackinfo) {
4179 PERL_SI *p = PL_curstackinfo->si_prev;
4180 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4181 Safefree(PL_curstackinfo->si_cxstack);
4182 Safefree(PL_curstackinfo);
4183 PL_curstackinfo = p;
4184 }
4185 Safefree(PL_tmps_stack);
4186 Safefree(PL_markstack);
4187 Safefree(PL_scopestack);
4188 #ifdef DEBUGGING
4189 Safefree(PL_scopestack_name);
4190 #endif
4191 Safefree(PL_savestack);
4192 }
4194 void
4195 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4196 {
4197 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4198 AV *const isa = GvAVn(gv);
4199 va_list args;
4201 PERL_ARGS_ASSERT_POPULATE_ISA;
4203 if(AvFILLp(isa) != -1)
4204 return;
4206 /* NOTE: No support for tied ISA */
4208 va_start(args, len);
4209 do {
4210 const char *const parent = va_arg(args, const char*);
4211 size_t parent_len;
4213 if (!parent)
4214 break;
4215 parent_len = va_arg(args, size_t);
4217 /* Arguments are supplied with a trailing :: */
4218 assert(parent_len > 2);
4219 assert(parent[parent_len - 1] == ':');
4220 assert(parent[parent_len - 2] == ':');
4221 av_push(isa, newSVpvn(parent, parent_len - 2));
4222 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4223 } while (1);
4224 va_end(args);
4225 }
4228 STATIC void
4229 S_init_predump_symbols(pTHX)
4230 {
4231 GV *tmpgv;
4232 IO *io;
4234 sv_setpvs(get_sv("\"", GV_ADD), " ");
4235 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4238 /* Historically, PVIOs were blessed into IO::Handle, unless
4239 FileHandle was loaded, in which case they were blessed into
4240 that. Action at a distance.
4241 However, if we simply bless into IO::Handle, we break code
4242 that assumes that PVIOs will have (among others) a seek
4243 method. IO::File inherits from IO::Handle and IO::Seekable,
4244 and provides the needed methods. But if we simply bless into
4245 it, then we break code that assumed that by loading
4246 IO::Handle, *it* would work.
4247 So a compromise is to set up the correct @IO::File::ISA,
4248 so that code that does C<use IO::Handle>; will still work.
4249 */
4251 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4252 STR_WITH_LEN("IO::Handle::"),
4253 STR_WITH_LEN("IO::Seekable::"),
4254 STR_WITH_LEN("Exporter::"),
4255 NULL);
4257 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4258 GvMULTI_on(PL_stdingv);
4259 io = GvIOp(PL_stdingv);
4260 IoTYPE(io) = IoTYPE_RDONLY;
4261 IoIFP(io) = PerlIO_stdin();
4262 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4263 GvMULTI_on(tmpgv);
4264 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4266 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4267 GvMULTI_on(tmpgv);
4268 io = GvIOp(tmpgv);
4269 IoTYPE(io) = IoTYPE_WRONLY;
4270 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4271 setdefout(tmpgv);
4272 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4273 GvMULTI_on(tmpgv);
4274 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4276 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4277 GvMULTI_on(PL_stderrgv);
4278 io = GvIOp(PL_stderrgv);
4279 IoTYPE(io) = IoTYPE_WRONLY;
4280 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4281 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4282 GvMULTI_on(tmpgv);
4283 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4285 PL_statname = newSVpvs(""); /* last filename we did stat on */
4286 }
4288 void
4289 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4290 {
4291 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4293 argc--,argv++; /* skip name of script */
4294 if (PL_doswitches) {
4295 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4296 char *s;
4297 if (!argv[0][1])
4298 break;
4299 if (argv[0][1] == '-' && !argv[0][2]) {
4300 argc--,argv++;
4301 break;
4302 }
4303 if ((s = strchr(argv[0], '='))) {
4304 const char *const start_name = argv[0] + 1;
4305 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4306 TRUE, SVt_PV)), s + 1);
4307 }
4308 else
4309 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4310 }
4311 }
4312 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4313 SvREFCNT_inc_simple_void_NN(PL_argvgv);
4314 GvMULTI_on(PL_argvgv);
4315 av_clear(GvAVn(PL_argvgv));
4316 for (; argc > 0; argc--,argv++) {
4317 SV * const sv = newSVpv(argv[0],0);
4318 av_push(GvAV(PL_argvgv),sv);
4319 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4320 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4321 SvUTF8_on(sv);
4322 }
4323 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4324 (void)sv_utf8_decode(sv);
4325 }
4326 }
4328 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4329 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4330 "-i used with no filenames on the command line, "
4331 "reading from STDIN");
4332 }
4334 STATIC void
4335 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4336 {
4337 #ifdef USE_ITHREADS
4338 dVAR;
4339 #endif
4340 GV* tmpgv;
4342 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4344 PL_toptarget = newSV_type(SVt_PVIV);
4345 SvPVCLEAR(PL_toptarget);
4346 PL_bodytarget = newSV_type(SVt_PVIV);
4347 SvPVCLEAR(PL_bodytarget);
4348 PL_formtarget = PL_bodytarget;
4350 TAINT;
4352 init_argv_symbols(argc,argv);
4354 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4355 sv_setpv(GvSV(tmpgv),PL_origfilename);
4356 }
4357 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4358 HV *hv;
4359 bool env_is_not_environ;
4360 SvREFCNT_inc_simple_void_NN(PL_envgv);
4361 GvMULTI_on(PL_envgv);
4362 hv = GvHVn(PL_envgv);
4363 hv_magic(hv, NULL, PERL_MAGIC_env);
4364 #ifndef PERL_MICRO
4365 #ifdef USE_ENVIRON_ARRAY
4366 /* Note that if the supplied env parameter is actually a copy
4367 of the global environ then it may now point to free'd memory
4368 if the environment has been modified since. To avoid this
4369 problem we treat env==NULL as meaning 'use the default'
4370 */
4371 if (!env)
4372 env = environ;
4373 env_is_not_environ = env != environ;
4374 if (env_is_not_environ
4375 # ifdef USE_ITHREADS
4376 && PL_curinterp == aTHX
4377 # endif
4378 )
4379 {
4380 environ[0] = NULL;
4381 }
4382 if (env) {
4383 char *s, *old_var;
4384 STRLEN nlen;
4385 SV *sv;
4386 HV *dups = newHV();
4388 for (; *env; env++) {
4389 old_var = *env;
4391 if (!(s = strchr(old_var,'=')) || s == old_var)
4392 continue;
4393 nlen = s - old_var;
4395 #if defined(MSDOS) && !defined(DJGPP)
4396 *s = '\0';
4397 (void)strupr(old_var);
4398 *s = '=';
4399 #endif
4400 if (hv_exists(hv, old_var, nlen)) {
4401 const char *name = savepvn(old_var, nlen);
4403 /* make sure we use the same value as getenv(), otherwise code that
4404 uses getenv() (like setlocale()) might see a different value to %ENV
4405 */
4406 sv = newSVpv(PerlEnv_getenv(name), 0);
4408 /* keep a count of the dups of this name so we can de-dup environ later */
4409 if (hv_exists(dups, name, nlen))
4410 ++SvIVX(*hv_fetch(dups, name, nlen, 0));
4411 else
4412 (void)hv_store(dups, name, nlen, newSViv(1), 0);
4414 Safefree(name);
4415 }
4416 else {
4417 sv = newSVpv(s+1, 0);
4418 }
4419 (void)hv_store(hv, old_var, nlen, sv, 0);
4420 if (env_is_not_environ)
4421 mg_set(sv);
4422 }
4423 if (HvKEYS(dups)) {
4424 /* environ has some duplicate definitions, remove them */
4425 HE *entry;
4426 hv_iterinit(dups);
4427 while ((entry = hv_iternext_flags(dups, 0))) {
4428 STRLEN nlen;
4429 const char *name = HePV(entry, nlen);
4430 IV count = SvIV(HeVAL(entry));
4431 IV i;
4432 SV **valp = hv_fetch(hv, name, nlen, 0);
4434 assert(valp);
4436 /* try to remove any duplicate names, depending on the
4437 * implementation used in my_setenv() the iteration might
4438 * not be necessary, but let's be safe.
4439 */
4440 for (i = 0; i < count; ++i)
4441 my_setenv(name, 0);
4443 /* and set it back to the value we set $ENV{name} to */
4444 my_setenv(name, SvPV_nolen(*valp));
4445 }
4446 }
4447 SvREFCNT_dec_NN(dups);
4448 }
4449 #endif /* USE_ENVIRON_ARRAY */
4450 #endif /* !PERL_MICRO */
4451 }
4452 TAINT_NOT;
4454 /* touch @F array to prevent spurious warnings 20020415 MJD */
4455 if (PL_minus_a) {
4456 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4457 }
4458 }
4460 STATIC void
4461 S_init_perllib(pTHX)
4462 {
4463 #ifndef VMS
4464 const char *perl5lib = NULL;
4465 #endif
4466 const char *s;
4467 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4468 STRLEN len;
4469 #endif
4471 if (!TAINTING_get) {
4472 #ifndef VMS
4473 perl5lib = PerlEnv_getenv("PERL5LIB");
4474 /*
4475 * It isn't possible to delete an environment variable with
4476 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4477 * case we treat PERL5LIB as undefined if it has a zero-length value.
4478 */
4479 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4480 if (perl5lib && *perl5lib != '\0')
4481 #else
4482 if (perl5lib)
4483 #endif
4484 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4485 else {
4486 s = PerlEnv_getenv("PERLLIB");
4487 if (s)
4488 incpush_use_sep(s, 0, 0);
4489 }
4490 #else /* VMS */
4491 /* Treat PERL5?LIB as a possible search list logical name -- the
4492 * "natural" VMS idiom for a Unix path string. We allow each
4493 * element to be a set of |-separated directories for compatibility.
4494 */
4495 char buf[256];
4496 int idx = 0;
4497 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4498 do {
4499 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4500 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4501 else {
4502 while (vmstrnenv("PERLLIB",buf,idx++,NULL,0))
4503 incpush_use_sep(buf, 0, 0);
4504 }
4505 #endif /* VMS */
4506 }
4508 #ifndef PERL_IS_MINIPERL
4509 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4510 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4512 /* Use the ~-expanded versions of APPLLIB (undocumented),
4513 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4514 */
4515 #ifdef APPLLIB_EXP
4516 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4517 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4518 #endif
4520 #ifdef SITEARCH_EXP
4521 /* sitearch is always relative to sitelib on Windows for
4522 * DLL-based path intuition to work correctly */
4523 # if !defined(WIN32)
4524 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4525 INCPUSH_CAN_RELOCATE);
4526 # endif
4527 #endif
4529 #ifdef SITELIB_EXP
4530 # if defined(WIN32)
4531 /* this picks up sitearch as well */
4532 s = PerlEnv_sitelib_path(PERL_FS_VERSION, &len);
4533 if (s)
4534 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4535 # else
4536 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4537 # endif
4538 #endif
4540 #ifdef PERL_VENDORARCH_EXP
4541 /* vendorarch is always relative to vendorlib on Windows for
4542 * DLL-based path intuition to work correctly */
4543 # if !defined(WIN32)
4544 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4545 INCPUSH_CAN_RELOCATE);
4546 # endif
4547 #endif
4549 #ifdef PERL_VENDORLIB_EXP
4550 # if defined(WIN32)
4551 /* this picks up vendorarch as well */
4552 s = PerlEnv_vendorlib_path(PERL_FS_VERSION, &len);
4553 if (s)
4554 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4555 # else
4556 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4557 INCPUSH_CAN_RELOCATE);
4558 # endif
4559 #endif
4561 #ifdef ARCHLIB_EXP
4562 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4563 #endif
4565 #ifndef PRIVLIB_EXP
4566 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4567 #endif
4569 #if defined(WIN32)
4570 s = PerlEnv_lib_path(PERL_FS_VERSION, &len);
4571 if (s)
4572 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4573 #else
4574 # ifdef NETWARE
4575 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4576 # else
4577 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4578 # endif
4579 #endif
4581 #ifdef PERL_OTHERLIBDIRS
4582 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4583 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4584 |INCPUSH_CAN_RELOCATE);
4585 #endif
4587 if (!TAINTING_get) {
4588 #ifndef VMS
4589 /*
4590 * It isn't possible to delete an environment variable with
4591 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4592 * case we treat PERL5LIB as undefined if it has a zero-length value.
4593 */
4594 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4595 if (perl5lib && *perl5lib != '\0')
4596 #else
4597 if (perl5lib)
4598 #endif
4599 incpush_use_sep(perl5lib, 0,
4600 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4601 #else /* VMS */
4602 /* Treat PERL5?LIB as a possible search list logical name -- the
4603 * "natural" VMS idiom for a Unix path string. We allow each
4604 * element to be a set of |-separated directories for compatibility.
4605 */
4606 char buf[256];
4607 int idx = 0;
4608 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4609 do {
4610 incpush_use_sep(buf, 0,
4611 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4612 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4613 #endif /* VMS */
4614 }
4616 /* Use the ~-expanded versions of APPLLIB (undocumented),
4617 SITELIB and VENDORLIB for older versions
4618 */
4619 #ifdef APPLLIB_EXP
4620 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4621 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4622 #endif
4624 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4625 /* Search for version-specific dirs below here */
4626 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4627 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4628 #endif
4631 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4632 /* Search for version-specific dirs below here */
4633 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4634 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4635 #endif
4637 #ifdef PERL_OTHERLIBDIRS
4638 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4639 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4640 |INCPUSH_CAN_RELOCATE);
4641 #endif
4642 #endif /* !PERL_IS_MINIPERL */
4644 if (!TAINTING_get) {
4645 #if !defined(PERL_IS_MINIPERL) && defined(DEFAULT_INC_EXCLUDES_DOT)
4646 const char * const unsafe = PerlEnv_getenv("PERL_USE_UNSAFE_INC");
4647 if (unsafe && strEQ(unsafe, "1"))
4648 #endif
4649 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4650 }
4651 }
4653 #if defined(DOSISH) || defined(__SYMBIAN32__)
4654 # define PERLLIB_SEP ';'
4655 #else
4656 # if defined(__VMS)
4657 # define PERLLIB_SEP PL_perllib_sep
4658 # else
4659 # define PERLLIB_SEP ':'
4660 # endif
4661 #endif
4662 #ifndef PERLLIB_MANGLE
4663 # define PERLLIB_MANGLE(s,n) (s)
4664 #endif
4666 #ifndef PERL_IS_MINIPERL
4667 /* Push a directory onto @INC if it exists.
4668 Generate a new SV if we do this, to save needing to copy the SV we push
4669 onto @INC */
4670 STATIC SV *
4671 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4672 {
4673 Stat_t tmpstatbuf;
4675 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4677 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4678 S_ISDIR(tmpstatbuf.st_mode)) {
4679 av_push(av, dir);
4680 dir = newSVsv(stem);
4681 } else {
4682 /* Truncate dir back to stem. */
4683 SvCUR_set(dir, SvCUR(stem));
4684 }
4685 return dir;
4686 }
4687 #endif
4689 STATIC SV *
4690 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4691 {
4692 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4693 SV *libdir;
4695 PERL_ARGS_ASSERT_MAYBERELOCATE;
4696 assert(len > 0);
4698 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4699 defined to so something (in os2/os2.c), but the code has been
4700 this way, ignoring any possible changed of length, since
4701 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4702 it be. */
4703 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4705 #ifdef VMS
4706 {
4707 char *unix;
4709 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4710 len = strlen(unix);
4711 while (len > 1 && unix[len-1] == '/') len--; /* Cosmetic */
4712 sv_usepvn(libdir,unix,len);
4713 }
4714 else
4715 PerlIO_printf(Perl_error_log,
4716 "Failed to unixify @INC element \"%s\"\n",
4717 SvPV_nolen_const(libdir));
4718 }
4719 #endif
4721 /* Do the if() outside the #ifdef to avoid warnings about an unused
4722 parameter. */
4723 if (canrelocate) {
4724 #ifdef PERL_RELOCATABLE_INC
4725 /*
4726 * Relocatable include entries are marked with a leading .../
4727 *
4728 * The algorithm is
4729 * 0: Remove that leading ".../"
4730 * 1: Remove trailing executable name (anything after the last '/')
4731 * from the perl path to give a perl prefix
4732 * Then
4733 * While the @INC element starts "../" and the prefix ends with a real
4734 * directory (ie not . or ..) chop that real directory off the prefix
4735 * and the leading "../" from the @INC element. ie a logical "../"
4736 * cleanup
4737 * Finally concatenate the prefix and the remainder of the @INC element
4738 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4739 * generates /usr/local/lib/perl5
4740 */
4741 const char *libpath = SvPVX(libdir);
4742 STRLEN libpath_len = SvCUR(libdir);
4743 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4744 /* Game on! */
4745 SV * const caret_X = get_sv("\030", 0);
4746 /* Going to use the SV just as a scratch buffer holding a C
4747 string: */
4748 SV *prefix_sv;
4749 char *prefix;
4750 char *lastslash;
4752 /* $^X is *the* source of taint if tainting is on, hence
4753 SvPOK() won't be true. */
4754 assert(caret_X);
4755 assert(SvPOKp(caret_X));
4756 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4757 SvUTF8(caret_X));
4758 /* Firstly take off the leading .../
4759 If all else fail we'll do the paths relative to the current
4760 directory. */
4761 sv_chop(libdir, libpath + 4);
4762 /* Don't use SvPV as we're intentionally bypassing taining,
4763 mortal copies that the mg_get of tainting creates, and
4764 corruption that seems to come via the save stack.
4765 I guess that the save stack isn't correctly set up yet. */
4766 libpath = SvPVX(libdir);
4767 libpath_len = SvCUR(libdir);
4769 /* This would work more efficiently with memrchr, but as it's
4770 only a GNU extension we'd need to probe for it and
4771 implement our own. Not hard, but maybe not worth it? */
4773 prefix = SvPVX(prefix_sv);
4774 lastslash = strrchr(prefix, '/');
4776 /* First time in with the *lastslash = '\0' we just wipe off
4777 the trailing /perl from (say) /usr/foo/bin/perl
4778 */
4779 if (lastslash) {
4780 SV *tempsv;
4781 while ((*lastslash = '\0'), /* Do that, come what may. */
4782 (libpath_len >= 3 && _memEQs(libpath, "../")
4783 && (lastslash = strrchr(prefix, '/')))) {
4784 if (lastslash[1] == '\0'
4785 || (lastslash[1] == '.'
4786 && (lastslash[2] == '/' /* ends "/." */
4787 || (lastslash[2] == '/'
4788 && lastslash[3] == '/' /* or "/.." */
4789 )))) {
4790 /* Prefix ends "/" or "/." or "/..", any of which
4791 are fishy, so don't do any more logical cleanup.
4792 */
4793 break;
4794 }
4795 /* Remove leading "../" from path */
4796 libpath += 3;
4797 libpath_len -= 3;
4798 /* Next iteration round the loop removes the last
4799 directory name from prefix by writing a '\0' in
4800 the while clause. */
4801 }
4802 /* prefix has been terminated with a '\0' to the correct
4803 length. libpath points somewhere into the libdir SV.
4804 We need to join the 2 with '/' and drop the result into
4805 libdir. */
4806 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4807 SvREFCNT_dec(libdir);
4808 /* And this is the new libdir. */
4809 libdir = tempsv;
4810 if (TAINTING_get &&
4811 (PerlProc_getuid() != PerlProc_geteuid() ||
4812 PerlProc_getgid() != PerlProc_getegid())) {
4813 /* Need to taint relocated paths if running set ID */
4814 SvTAINTED_on(libdir);
4815 }
4816 }
4817 SvREFCNT_dec(prefix_sv);
4818 }
4819 #endif
4820 }
4821 return libdir;
4822 }
4824 STATIC void
4825 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4826 {
4827 #ifndef PERL_IS_MINIPERL
4828 const U8 using_sub_dirs
4829 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4830 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4831 const U8 add_versioned_sub_dirs
4832 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4833 const U8 add_archonly_sub_dirs
4834 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4835 #ifdef PERL_INC_VERSION_LIST
4836 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4837 #endif
4838 #endif
4839 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4840 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4841 AV *const inc = GvAVn(PL_incgv);
4843 PERL_ARGS_ASSERT_INCPUSH;
4844 assert(len > 0);
4846 /* Could remove this vestigial extra block, if we don't mind a lot of
4847 re-indenting diff noise. */
4848 {
4849 SV *const libdir = mayberelocate(dir, len, flags);
4850 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4851 arranged to unshift #! line -I onto the front of @INC. However,
4852 -I can add version and architecture specific libraries, and they
4853 need to go first. The old code assumed that it was always
4854 pushing. Hence to make it work, need to push the architecture
4855 (etc) libraries onto a temporary array, then "unshift" that onto
4856 the front of @INC. */
4857 #ifndef PERL_IS_MINIPERL
4858 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4860 /*
4861 * BEFORE pushing libdir onto @INC we may first push version- and
4862 * archname-specific sub-directories.
4863 */
4864 if (using_sub_dirs) {
4865 SV *subdir = newSVsv(libdir);
4866 #ifdef PERL_INC_VERSION_LIST
4867 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4868 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4869 const char * const *incver;
4870 #endif
4872 if (add_versioned_sub_dirs) {
4873 /* .../version/archname if -d .../version/archname */
4874 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4875 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4877 /* .../version if -d .../version */
4878 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4879 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4880 }
4882 #ifdef PERL_INC_VERSION_LIST
4883 if (addoldvers) {
4884 for (incver = incverlist; *incver; incver++) {
4885 /* .../xxx if -d .../xxx */
4886 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4887 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4888 }
4889 }
4890 #endif
4892 if (add_archonly_sub_dirs) {
4893 /* .../archname if -d .../archname */
4894 sv_catpvs(subdir, "/" ARCHNAME);
4895 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4897 }
4899 assert (SvREFCNT(subdir) == 1);
4900 SvREFCNT_dec(subdir);
4901 }
4902 #endif /* !PERL_IS_MINIPERL */
4903 /* finally add this lib directory at the end of @INC */
4904 if (unshift) {
4905 #ifdef PERL_IS_MINIPERL
4906 const Size_t extra = 0;
4907 #else
4908 Size_t extra = av_tindex(av) + 1;
4909 #endif
4910 av_unshift(inc, extra + push_basedir);
4911 if (push_basedir)
4912 av_store(inc, extra, libdir);
4913 #ifndef PERL_IS_MINIPERL
4914 while (extra--) {
4915 /* av owns a reference, av_store() expects to be donated a
4916 reference, and av expects to be sane when it's cleared.
4917 If I wanted to be naughty and wrong, I could peek inside the
4918 implementation of av_clear(), realise that it uses
4919 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4920 and so directly steal from it (with a memcpy() to inc, and
4921 then memset() to NULL them out. But people copy code from the
4922 core expecting it to be best practise, so let's use the API.
4923 Although studious readers will note that I'm not checking any
4924 return codes. */
4925 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4926 }
4927 SvREFCNT_dec(av);
4928 #endif
4929 }
4930 else if (push_basedir) {
4931 av_push(inc, libdir);
4932 }
4934 if (!push_basedir) {
4935 assert (SvREFCNT(libdir) == 1);
4936 SvREFCNT_dec(libdir);
4937 }
4938 }
4939 }
4941 STATIC void
4942 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4943 {
4944 const char *s;
4945 const char *end;
4946 /* This logic has been broken out from S_incpush(). It may be possible to
4947 simplify it. */
4949 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4951 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4952 * argument to incpush_use_sep. This allows creation of relocatable
4953 * Perl distributions that patch the binary at install time. Those
4954 * distributions will have to provide their own relocation tools; this
4955 * is not a feature otherwise supported by core Perl.
4956 */
4957 #ifndef PERL_RELOCATABLE_INCPUSH
4958 if (!len)
4959 #endif
4960 len = strlen(p);
4962 end = p + len;
4964 /* Break at all separators */
4965 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4966 if (s == p) {
4967 /* skip any consecutive separators */
4969 /* Uncomment the next line for PATH semantics */
4970 /* But you'll need to write tests */
4971 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4972 } else {
4973 incpush(p, (STRLEN)(s - p), flags);
4974 }
4975 p = s + 1;
4976 }
4977 if (p != end)
4978 incpush(p, (STRLEN)(end - p), flags);
4980 }
4982 void
4983 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4984 {
4985 SV *atsv;
4986 VOL const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4987 CV *cv;
4988 STRLEN len;
4989 int ret;
4990 dJMPENV;
4992 PERL_ARGS_ASSERT_CALL_LIST;
4994 while (av_tindex(paramList) >= 0) {
4995 cv = MUTABLE_CV(av_shift(paramList));
4996 if (PL_savebegin) {
4997 if (paramList == PL_beginav) {
4998 /* save PL_beginav for compiler */
4999 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5000 }
5001 else if (paramList == PL_checkav) {
5002 /* save PL_checkav for compiler */
5003 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5004 }
5005 else if (paramList == PL_unitcheckav) {
5006 /* save PL_unitcheckav for compiler */
5007 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5008 }
5009 } else {
5010 SAVEFREESV(cv);
5011 }
5012 JMPENV_PUSH(ret);
5013 switch (ret) {
5014 case 0:
5015 CALL_LIST_BODY(cv);
5016 atsv = ERRSV;
5017 (void)SvPV_const(atsv, len);
5018 if (len) {
5019 PL_curcop = &PL_compiling;
5020 CopLINE_set(PL_curcop, oldline);
5021 if (paramList == PL_beginav)
5022 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5023 else
5024 Perl_sv_catpvf(aTHX_ atsv,
5025 "%s failed--call queue aborted",
5026 paramList == PL_checkav ? "CHECK"
5027 : paramList == PL_initav ? "INIT"
5028 : paramList == PL_unitcheckav ? "UNITCHECK"
5029 : "END");
5030 while (PL_scopestack_ix > oldscope)
5031 LEAVE;
5032 JMPENV_POP;
5033 Perl_croak(aTHX_ "%" SVf, SVfARG(atsv));
5034 }
5035 break;
5036 case 1:
5037 STATUS_ALL_FAILURE;
5038 /* FALLTHROUGH */
5039 case 2:
5040 /* my_exit() was called */
5041 while (PL_scopestack_ix > oldscope)
5042 LEAVE;
5043 FREETMPS;
5044 SET_CURSTASH(PL_defstash);
5045 PL_curcop = &PL_compiling;
5046 CopLINE_set(PL_curcop, oldline);
5047 JMPENV_POP;
5048 my_exit_jump();
5049 NOT_REACHED; /* NOTREACHED */
5050 case 3:
5051 if (PL_restartop) {
5052 PL_curcop = &PL_compiling;
5053 CopLINE_set(PL_curcop, oldline);
5054 JMPENV_JUMP(3);
5055 }
5056 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
5057 FREETMPS;
5058 break;
5059 }
5060 JMPENV_POP;
5061 }
5062 }
5064 void
5065 Perl_my_exit(pTHX_ U32 status)
5066 {
5067 if (PL_exit_flags & PERL_EXIT_ABORT) {
5068 abort();
5069 }
5070 if (PL_exit_flags & PERL_EXIT_WARN) {
5071 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5072 Perl_warn(aTHX_ "Unexpected exit %lu", (unsigned long)status);
5073 PL_exit_flags &= ~PERL_EXIT_ABORT;
5074 }
5075 switch (status) {
5076 case 0:
5077 STATUS_ALL_SUCCESS;
5078 break;
5079 case 1:
5080 STATUS_ALL_FAILURE;
5081 break;
5082 default:
5083 STATUS_EXIT_SET(status);
5084 break;
5085 }
5086 my_exit_jump();
5087 }
5089 void
5090 Perl_my_failure_exit(pTHX)
5091 {
5092 #ifdef VMS
5093 /* We have been called to fall on our sword. The desired exit code
5094 * should be already set in STATUS_UNIX, but could be shifted over
5095 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5096 * that code is set.
5097 *
5098 * If an error code has not been set, then force the issue.
5099 */
5100 if (MY_POSIX_EXIT) {
5102 /* According to the die_exit.t tests, if errno is non-zero */
5103 /* It should be used for the error status. */
5105 if (errno == EVMSERR) {
5106 STATUS_NATIVE = vaxc$errno;
5107 } else {
5109 /* According to die_exit.t tests, if the child_exit code is */
5110 /* also zero, then we need to exit with a code of 255 */
5111 if ((errno != 0) && (errno < 256))
5112 STATUS_UNIX_EXIT_SET(errno);
5113 else if (STATUS_UNIX < 255) {
5114 STATUS_UNIX_EXIT_SET(255);
5115 }
5117 }
5119 /* The exit code could have been set by $? or vmsish which
5120 * means that it may not have fatal set. So convert
5121 * success/warning codes to fatal with out changing
5122 * the POSIX status code. The severity makes VMS native
5123 * status handling work, while UNIX mode programs use the
5124 * the POSIX exit codes.
5125 */
5126 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
5127 STATUS_NATIVE &= STS$M_COND_ID;
5128 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
5129 }
5130 }
5131 else {
5132 /* Traditionally Perl on VMS always expects a Fatal Error. */
5133 if (vaxc$errno & 1) {
5135 /* So force success status to failure */
5136 if (STATUS_NATIVE & 1)
5137 STATUS_ALL_FAILURE;
5138 }
5139 else {
5140 if (!vaxc$errno) {
5141 STATUS_UNIX = EINTR; /* In case something cares */
5142 STATUS_ALL_FAILURE;
5143 }
5144 else {
5145 int severity;
5146 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5148 /* Encode the severity code */
5149 severity = STATUS_NATIVE & STS$M_SEVERITY;
5150 STATUS_UNIX = (severity ? severity : 1) << 8;
5152 /* Perl expects this to be a fatal error */
5153 if (severity != STS$K_SEVERE)
5154 STATUS_ALL_FAILURE;
5155 }
5156 }
5157 }
5159 #else
5160 int exitstatus;
5161 if (errno & 255)
5162 STATUS_UNIX_SET(errno);
5163 else {
5164 exitstatus = STATUS_UNIX >> 8;
5165 if (exitstatus & 255)
5166 STATUS_UNIX_SET(exitstatus);
5167 else
5168 STATUS_UNIX_SET(255);
5169 }
5170 #endif
5171 if (PL_exit_flags & PERL_EXIT_ABORT) {
5172 abort();
5173 }
5174 if (PL_exit_flags & PERL_EXIT_WARN) {
5175 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5176 Perl_warn(aTHX_ "Unexpected exit failure %ld", (long)PL_statusvalue);
5177 PL_exit_flags &= ~PERL_EXIT_ABORT;
5178 }
5179 my_exit_jump();
5180 }
5182 STATIC void
5183 S_my_exit_jump(pTHX)
5184 {
5185 if (PL_e_script) {
5186 SvREFCNT_dec(PL_e_script);
5187 PL_e_script = NULL;
5188 }
5190 POPSTACK_TO(PL_mainstack);
5191 if (cxstack_ix >= 0) {
5192 dounwind(-1);
5193 cx_popblock(cxstack);
5194 }
5195 LEAVE_SCOPE(0);
5197 JMPENV_JUMP(2);
5198 }
5200 static I32
5201 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5202 {
5203 const char * const p = SvPVX_const(PL_e_script);
5204 const char *nl = strchr(p, '\n');
5206 PERL_UNUSED_ARG(idx);
5207 PERL_UNUSED_ARG(maxlen);
5209 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5210 if (nl-p == 0) {
5211 filter_del(read_e_script);
5212 return 0;
5213 }
5214 sv_catpvn(buf_sv, p, nl-p);
5215 sv_chop(PL_e_script, nl);
5216 return 1;
5217 }
5219 /* removes boilerplate code at the end of each boot_Module xsub */
5220 void
5221 Perl_xs_boot_epilog(pTHX_ const I32 ax)
5222 {
5223 if (PL_unitcheckav)
5224 call_list(PL_scopestack_ix, PL_unitcheckav);
5225 XSRETURN_YES;
5226 }
5228 /*
5229 * ex: set ts=8 sts=4 sw=4 et:
5230 */