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 * by Larry Wall and others
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.
14 * A ship then new they built for him
15 * of mithril and of elven-glass
16 * --from Bilbo's song of EƤrendil
18 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
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
27 #if defined(PERL_IS_MINIPERL) && !defined(USE_SITECUSTOMIZE)
28 # define USE_SITECUSTOMIZE
32 #define PERL_IN_PERL_C
34 #include "patchlevel.h" /* for local_patches */
41 #ifdef USE_KERN_PROC_PATHNAME
42 # include <sys/sysctl.h>
45 #ifdef USE_NSGETEXECUTABLEPATH
46 # include <mach-o/dyld.h>
49 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
56 char control[CMSG_SPACE(sizeof(int))];
69 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
70 char *getenv (char *); /* Usually in <stdlib.h> */
73 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
75 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
76 # define validate_suid(rsfp) NOOP
78 # define validate_suid(rsfp) S_validate_suid(aTHX_ rsfp)
81 #define CALL_BODY_SUB(myop) \
82 if (PL_op == (myop)) \
83 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
87 #define CALL_LIST_BODY(cv) \
88 PUSHMARK(PL_stack_sp); \
89 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD|G_VOID);
92 S_init_tls_and_interp(PerlInterpreter *my_perl)
96 PERL_SET_INTERP(my_perl);
97 #if defined(USE_ITHREADS)
100 PERL_SET_THX(my_perl);
104 MUTEX_INIT(&PL_dollarzero_mutex);
105 MUTEX_INIT(&PL_my_ctx_mutex);
108 #if defined(USE_ITHREADS)
111 /* This always happens for non-ithreads */
114 PERL_SET_THX(my_perl);
119 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
122 Perl_sys_init(int* argc, char*** argv)
126 PERL_ARGS_ASSERT_SYS_INIT;
128 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
129 PERL_UNUSED_ARG(argv);
130 PERL_SYS_INIT_BODY(argc, argv);
134 Perl_sys_init3(int* argc, char*** argv, char*** env)
138 PERL_ARGS_ASSERT_SYS_INIT3;
140 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
141 PERL_UNUSED_ARG(argv);
142 PERL_UNUSED_ARG(env);
143 PERL_SYS_INIT3_BODY(argc, argv, env);
150 if (!PL_veto_cleanup) {
151 PERL_SYS_TERM_BODY();
156 #ifdef PERL_IMPLICIT_SYS
158 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
159 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
160 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
161 struct IPerlDir* ipD, struct IPerlSock* ipS,
162 struct IPerlProc* ipP)
164 PerlInterpreter *my_perl;
166 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
168 /* Newx() needs interpreter, so call malloc() instead */
169 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
170 S_init_tls_and_interp(my_perl);
171 Zero(my_perl, 1, PerlInterpreter);
181 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
188 =head1 Embedding Functions
190 =for apidoc perl_alloc
192 Allocates a new Perl interpreter. See L<perlembed>.
200 PerlInterpreter *my_perl;
202 /* Newx() needs interpreter, so call malloc() instead */
203 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
205 S_init_tls_and_interp(my_perl);
206 #ifndef PERL_TRACK_MEMPOOL
207 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
209 Zero(my_perl, 1, PerlInterpreter);
210 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
214 #endif /* PERL_IMPLICIT_SYS */
217 =for apidoc perl_construct
219 Initializes a new Perl interpreter. See L<perlembed>.
225 perl_construct(pTHXx)
229 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
233 PL_perl_destruct_level = 1;
235 PERL_UNUSED_ARG(my_perl);
236 if (PL_perl_destruct_level > 0)
239 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
243 SvREADONLY_on(&PL_sv_placeholder);
244 SvREFCNT(&PL_sv_placeholder) = SvREFCNT_IMMORTAL;
246 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
247 #ifdef PERL_USES_PL_PIDSTATUS
248 PL_pidstatus = newHV();
251 PL_rs = newSVpvs("\n");
261 SET_NUMERIC_STANDARD();
263 #if defined(LOCAL_PATCH_COUNT)
264 PL_localpatches = local_patches; /* For possible -v */
267 #ifdef HAVE_INTERP_INTERN
271 PerlIO_init(aTHX); /* Hook to IO system */
273 PL_fdpid = newAV(); /* for remembering popen pids by fd */
274 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
275 PL_errors = newSVpvs("");
276 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
277 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
278 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
280 /* First entry is a list of empty elements. It needs to be initialised
281 else all hell breaks loose in S_find_uninit_var(). */
282 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
283 PL_regex_pad = AvARRAY(PL_regex_padav);
284 Newxz(PL_stashpad, PL_stashpadmax, HV *);
286 #ifdef USE_REENTRANT_API
287 Perl_reentrant_init(aTHX);
289 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
290 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
291 * This MUST be done before any hash stores or fetches take place.
292 * If you set PL_hash_seed (and presumably also PL_hash_seed_set)
293 * yourself, it is your responsibility to provide a good random seed!
294 * You can also define PERL_HASH_SEED in compile time, see hv.h.
296 * XXX: fix this comment */
297 if (PL_hash_seed_set == FALSE) {
298 Perl_get_hash_seed(aTHX_ PL_hash_seed);
299 PL_hash_seed_set= TRUE;
301 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
303 /* Note that strtab is a rather special HV. Assumptions are made
304 about not iterating on it, and not adding tie magic to it.
305 It is properly deallocated in perl_destruct() */
308 HvSHAREKEYS_off(PL_strtab); /* mandatory */
309 hv_ksplit(PL_strtab, 512);
311 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
312 _dyld_lookup_and_bind
313 ("__environ", (unsigned long *) &environ_pointer, NULL);
317 # ifdef USE_ENVIRON_ARRAY
318 PL_origenviron = environ;
322 /* Use sysconf(_SC_CLK_TCK) if available, if not
323 * available or if the sysconf() fails, use the HZ.
324 * The HZ if not originally defined has been by now
325 * been defined as CLK_TCK, if available. */
326 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK)
327 PL_clocktick = sysconf(_SC_CLK_TCK);
328 if (PL_clocktick <= 0)
332 PL_stashcache = newHV();
334 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
335 PL_apiversion = newSVpvs("v" PERL_API_VERSION_STRING);
338 if (!PL_mmap_page_size) {
339 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
341 SETERRNO(0, SS_NORMAL);
343 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
345 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
347 if ((long) PL_mmap_page_size < 0) {
349 SV * const error = ERRSV;
350 SvUPGRADE(error, SVt_PV);
351 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
354 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
358 # ifdef HAS_GETPAGESIZE
359 PL_mmap_page_size = getpagesize();
361 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
362 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
366 if (PL_mmap_page_size <= 0)
367 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
368 (IV) PL_mmap_page_size);
370 #endif /* HAS_MMAP */
372 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
373 PL_timesbase.tms_utime = 0;
374 PL_timesbase.tms_stime = 0;
375 PL_timesbase.tms_cutime = 0;
376 PL_timesbase.tms_cstime = 0;
379 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
381 PL_registered_mros = newHV();
382 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
383 HvMAX(PL_registered_mros) = 0;
389 =for apidoc nothreadhook
391 Stub that provides thread hook for perl_destruct when there are
398 Perl_nothreadhook(pTHX)
404 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
406 Perl_dump_sv_child(pTHX_ SV *sv)
409 const int sock = PL_dumper_fd;
410 const int debug_fd = PerlIO_fileno(Perl_debug_log);
411 union control_un control;
414 struct cmsghdr *cmptr;
416 unsigned char buffer[256];
418 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
420 if(sock == -1 || debug_fd == -1)
423 PerlIO_flush(Perl_debug_log);
425 /* All these shenanigans are to pass a file descriptor over to our child for
426 it to dump out to. We can't let it hold open the file descriptor when it
427 forks, as the file descriptor it will dump to can turn out to be one end
428 of pipe that some other process will wait on for EOF. (So as it would
429 be open, the wait would be forever.) */
431 msg.msg_control = control.control;
432 msg.msg_controllen = sizeof(control.control);
433 /* We're a connected socket so we don't need a destination */
439 cmptr = CMSG_FIRSTHDR(&msg);
440 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
441 cmptr->cmsg_level = SOL_SOCKET;
442 cmptr->cmsg_type = SCM_RIGHTS;
443 *((int *)CMSG_DATA(cmptr)) = 1;
445 vec[0].iov_base = (void*)&sv;
446 vec[0].iov_len = sizeof(sv);
447 got = sendmsg(sock, &msg, 0);
450 perror("Debug leaking scalars parent sendmsg failed");
453 if(got < sizeof(sv)) {
454 perror("Debug leaking scalars parent short sendmsg");
458 /* Return protocol is
460 unsigned char: length of location string (0 for empty)
461 unsigned char*: string (not terminated)
463 vec[0].iov_base = (void*)&returned_errno;
464 vec[0].iov_len = sizeof(returned_errno);
465 vec[1].iov_base = buffer;
468 got = readv(sock, vec, 2);
471 perror("Debug leaking scalars parent read failed");
472 PerlIO_flush(PerlIO_stderr());
475 if(got < sizeof(returned_errno) + 1) {
476 perror("Debug leaking scalars parent short read");
477 PerlIO_flush(PerlIO_stderr());
482 got = read(sock, buffer + 1, *buffer);
484 perror("Debug leaking scalars parent read 2 failed");
485 PerlIO_flush(PerlIO_stderr());
490 perror("Debug leaking scalars parent short read 2");
491 PerlIO_flush(PerlIO_stderr());
496 if (returned_errno || *buffer) {
497 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
498 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
499 returned_errno, strerror(returned_errno));
505 =for apidoc perl_destruct
507 Shuts down a Perl interpreter. See L<perlembed>.
516 VOL signed char destruct_level; /* see possible values in intrpvar.h */
518 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
523 PERL_ARGS_ASSERT_PERL_DESTRUCT;
525 PERL_UNUSED_ARG(my_perl);
528 assert(PL_scopestack_ix == 1);
530 /* wait for all pseudo-forked children to finish */
531 PERL_WAIT_FOR_CHILDREN;
533 destruct_level = PL_perl_destruct_level;
534 #if defined(DEBUGGING) || defined(PERL_TRACK_MEMPOOL)
536 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
538 const int i = atoi(s);
540 if (destruct_level < i) destruct_level = i;
542 #ifdef PERL_TRACK_MEMPOOL
543 /* RT #114496, for perl_free */
544 PL_perl_destruct_level = i;
550 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
556 if (PL_endav && !PL_minus_c) {
557 PERL_SET_PHASE(PERL_PHASE_END);
558 call_list(PL_scopestack_ix, PL_endav);
564 assert(PL_scopestack_ix == 0);
566 /* Need to flush since END blocks can produce output */
569 if (PL_threadhook(aTHX)) {
570 /* Threads hook has vetoed further cleanup */
571 PL_veto_cleanup = TRUE;
575 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
576 if (destruct_level != 0) {
577 /* Fork here to create a child. Our child's job is to preserve the
578 state of scalars prior to destruction, so that we can instruct it
579 to dump any scalars that we later find have leaked.
580 There's no subtlety in this code - it assumes POSIX, and it doesn't
584 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
585 perror("Debug leaking scalars socketpair failed");
591 perror("Debug leaking scalars fork failed");
595 /* We are the child */
596 const int sock = fd[1];
597 const int debug_fd = PerlIO_fileno(Perl_debug_log);
600 /* Our success message is an integer 0, and a char 0 */
601 static const char success[sizeof(int) + 1] = {0};
605 /* We need to close all other file descriptors otherwise we end up
606 with interesting hangs, where the parent closes its end of a
607 pipe, and sits waiting for (another) child to terminate. Only
608 that child never terminates, because it never gets EOF, because
609 we also have the far end of the pipe open. We even need to
610 close the debugging fd, because sometimes it happens to be one
611 end of a pipe, and a process is waiting on the other end for
612 EOF. Normally it would be closed at some point earlier in
613 destruction, but if we happen to cause the pipe to remain open,
614 EOF never occurs, and we get an infinite hang. Hence all the
615 games to pass in a file descriptor if it's actually needed. */
617 f = sysconf(_SC_OPEN_MAX);
619 where = "sysconf failed";
630 union control_un control;
633 struct cmsghdr *cmptr;
637 msg.msg_control = control.control;
638 msg.msg_controllen = sizeof(control.control);
639 /* We're a connected socket so we don't need a source */
643 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
645 vec[0].iov_base = (void*)⌖
646 vec[0].iov_len = sizeof(target);
648 got = recvmsg(sock, &msg, 0);
653 where = "recv failed";
656 if(got < sizeof(target)) {
657 where = "short recv";
661 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
665 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
666 where = "wrong cmsg_len";
669 if(cmptr->cmsg_level != SOL_SOCKET) {
670 where = "wrong cmsg_level";
673 if(cmptr->cmsg_type != SCM_RIGHTS) {
674 where = "wrong cmsg_type";
678 got_fd = *(int*)CMSG_DATA(cmptr);
679 /* For our last little bit of trickery, put the file descriptor
680 back into Perl_debug_log, as if we never actually closed it
682 if(got_fd != debug_fd) {
683 if (dup2(got_fd, debug_fd) == -1) {
690 PerlIO_flush(Perl_debug_log);
692 got = write(sock, &success, sizeof(success));
695 where = "write failed";
698 if(got < sizeof(success)) {
699 where = "short write";
706 int send_errno = errno;
707 unsigned char length = (unsigned char) strlen(where);
708 struct iovec failure[3] = {
709 {(void*)&send_errno, sizeof(send_errno)},
711 {(void*)where, length}
713 int got = writev(sock, failure, 3);
714 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
715 in the parent if we try to read from the socketpair after the
716 child has exited, even if there was data to read.
717 So sleep a bit to give the parent a fighting chance of
720 _exit((got == -1) ? errno : 0);
724 PL_dumper_fd = fd[0];
729 /* We must account for everything. */
731 /* Destroy the main CV and syntax tree */
732 /* Set PL_curcop now, because destroying ops can cause new SVs
733 to be generated in Perl_pad_swipe, and when running with
734 -DDEBUG_LEAKING_SCALARS they expect PL_curcop to point to a valid
735 op from which the filename structure member is copied. */
736 PL_curcop = &PL_compiling;
738 /* ensure comppad/curpad to refer to main's pad */
739 if (CvPADLIST(PL_main_cv)) {
740 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
742 op_free(PL_main_root);
745 PL_main_start = NULL;
746 /* note that PL_main_cv isn't usually actually freed at this point,
747 * due to the CvOUTSIDE refs from subs compiled within it. It will
748 * get freed once all the subs are freed in sv_clean_all(), for
749 * destruct_level > 0 */
750 SvREFCNT_dec(PL_main_cv);
752 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
754 /* Tell PerlIO we are about to tear things apart in case
755 we have layers which are using resources that should
759 PerlIO_destruct(aTHX);
762 * Try to destruct global references. We do this first so that the
763 * destructors and destructees still exist. Some sv's might remain.
764 * Non-referenced objects are on their own.
768 /* unhook hooks which will soon be, or use, destroyed data */
769 SvREFCNT_dec(PL_warnhook);
771 SvREFCNT_dec(PL_diehook);
774 /* call exit list functions */
775 while (PL_exitlistlen-- > 0)
776 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
778 Safefree(PL_exitlist);
783 SvREFCNT_dec(PL_registered_mros);
785 /* jettison our possibly duplicated environment */
786 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
787 * so we certainly shouldn't free it here
790 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
791 if (environ != PL_origenviron && !PL_use_safe_putenv
793 /* only main thread can free environ[0] contents */
794 && PL_curinterp == aTHX
800 for (i = 0; environ[i]; i++)
801 safesysfree(environ[i]);
803 /* Must use safesysfree() when working with environ. */
804 safesysfree(environ);
806 environ = PL_origenviron;
809 #endif /* !PERL_MICRO */
811 if (destruct_level == 0) {
813 DEBUG_P(debprofdump());
815 #if defined(PERLIO_LAYERS)
816 /* No more IO - including error messages ! */
817 PerlIO_cleanup(aTHX);
820 CopFILE_free(&PL_compiling);
822 /* The exit() function will do everything that needs doing. */
827 /* the syntax tree is shared between clones
828 * so op_free(PL_main_root) only ReREFCNT_dec's
829 * REGEXPs in the parent interpreter
830 * we need to manually ReREFCNT_dec for the clones
833 I32 i = AvFILLp(PL_regex_padav);
834 SV **ary = AvARRAY(PL_regex_padav);
837 SvREFCNT_dec(ary[i]);
838 ary[i] = &PL_sv_undef;
844 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
845 PL_stashcache = NULL;
847 /* loosen bonds of global variables */
849 /* XXX can PL_parser still be non-null here? */
850 if(PL_parser && PL_parser->rsfp) {
851 (void)PerlIO_close(PL_parser->rsfp);
852 PL_parser->rsfp = NULL;
856 Safefree(PL_splitstr);
866 PL_doswitches = FALSE;
867 PL_dowarn = G_WARN_OFF;
868 #ifdef PERL_SAWAMPERSAND
869 PL_sawampersand = 0; /* must save all match strings */
873 Safefree(PL_inplace);
875 SvREFCNT_dec(PL_patchlevel);
876 SvREFCNT_dec(PL_apiversion);
879 SvREFCNT_dec(PL_e_script);
885 /* magical thingies */
887 SvREFCNT_dec(PL_ofsgv); /* *, */
890 SvREFCNT_dec(PL_ors_sv); /* $\ */
893 SvREFCNT_dec(PL_rs); /* $/ */
896 Safefree(PL_osname); /* $^O */
899 SvREFCNT_dec(PL_statname);
903 /* defgv, aka *_ should be taken care of elsewhere */
906 Safefree(PL_efloatbuf);
910 /* startup and shutdown function lists */
911 SvREFCNT_dec(PL_beginav);
912 SvREFCNT_dec(PL_beginav_save);
913 SvREFCNT_dec(PL_endav);
914 SvREFCNT_dec(PL_checkav);
915 SvREFCNT_dec(PL_checkav_save);
916 SvREFCNT_dec(PL_unitcheckav);
917 SvREFCNT_dec(PL_unitcheckav_save);
918 SvREFCNT_dec(PL_initav);
920 PL_beginav_save = NULL;
923 PL_checkav_save = NULL;
924 PL_unitcheckav = NULL;
925 PL_unitcheckav_save = NULL;
928 /* shortcuts just get cleared */
937 PL_last_in_gv = NULL;
949 SvREFCNT_dec(PL_argvout_stack);
950 PL_argvout_stack = NULL;
952 SvREFCNT_dec(PL_modglobal);
954 SvREFCNT_dec(PL_preambleav);
955 PL_preambleav = NULL;
956 SvREFCNT_dec(PL_subname);
958 #ifdef PERL_USES_PL_PIDSTATUS
959 SvREFCNT_dec(PL_pidstatus);
962 SvREFCNT_dec(PL_toptarget);
964 SvREFCNT_dec(PL_bodytarget);
965 PL_bodytarget = NULL;
966 PL_formtarget = NULL;
968 /* free locale stuff */
969 #ifdef USE_LOCALE_COLLATE
970 Safefree(PL_collation_name);
971 PL_collation_name = NULL;
974 #ifdef USE_LOCALE_NUMERIC
975 Safefree(PL_numeric_name);
976 PL_numeric_name = NULL;
977 SvREFCNT_dec(PL_numeric_radix_sv);
978 PL_numeric_radix_sv = NULL;
981 /* clear character classes */
982 for (i = 0; i < POSIX_SWASH_COUNT; i++) {
983 SvREFCNT_dec(PL_utf8_swash_ptrs[i]);
984 PL_utf8_swash_ptrs[i] = NULL;
986 SvREFCNT_dec(PL_utf8_mark);
987 SvREFCNT_dec(PL_utf8_toupper);
988 SvREFCNT_dec(PL_utf8_totitle);
989 SvREFCNT_dec(PL_utf8_tolower);
990 SvREFCNT_dec(PL_utf8_tofold);
991 SvREFCNT_dec(PL_utf8_idstart);
992 SvREFCNT_dec(PL_utf8_idcont);
993 SvREFCNT_dec(PL_utf8_foldclosures);
995 PL_utf8_toupper = NULL;
996 PL_utf8_totitle = NULL;
997 PL_utf8_tolower = NULL;
998 PL_utf8_tofold = NULL;
999 PL_utf8_idstart = NULL;
1000 PL_utf8_idcont = NULL;
1001 PL_utf8_foldclosures = NULL;
1002 for (i = 0; i < POSIX_CC_COUNT; i++) {
1003 SvREFCNT_dec(PL_Posix_ptrs[i]);
1004 PL_Posix_ptrs[i] = NULL;
1006 SvREFCNT_dec(PL_L1Posix_ptrs[i]);
1007 PL_L1Posix_ptrs[i] = NULL;
1009 SvREFCNT_dec(PL_XPosix_ptrs[i]);
1010 PL_XPosix_ptrs[i] = NULL;
1013 if (!specialWARN(PL_compiling.cop_warnings))
1014 PerlMemShared_free(PL_compiling.cop_warnings);
1015 PL_compiling.cop_warnings = NULL;
1016 cophh_free(CopHINTHASH_get(&PL_compiling));
1017 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1018 CopFILE_free(&PL_compiling);
1020 /* Prepare to destruct main symbol table. */
1023 /* break ref loop *:: <=> %:: */
1024 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1027 SvREFCNT_dec(PL_curstname);
1028 PL_curstname = NULL;
1030 /* clear queued errors */
1031 SvREFCNT_dec(PL_errors);
1034 SvREFCNT_dec(PL_isarev);
1037 if (destruct_level >= 2) {
1038 if (PL_scopestack_ix != 0)
1039 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1040 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1041 (long)PL_scopestack_ix);
1042 if (PL_savestack_ix != 0)
1043 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1044 "Unbalanced saves: %ld more saves than restores\n",
1045 (long)PL_savestack_ix);
1046 if (PL_tmps_floor != -1)
1047 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1048 (long)PL_tmps_floor + 1);
1049 if (cxstack_ix != -1)
1050 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1051 (long)cxstack_ix + 1);
1055 SvREFCNT_dec(PL_regex_padav);
1056 PL_regex_padav = NULL;
1057 PL_regex_pad = NULL;
1060 #ifdef PERL_IMPLICIT_CONTEXT
1061 /* the entries in this list are allocated via SV PVX's, so get freed
1062 * in sv_clean_all */
1063 Safefree(PL_my_cxt_list);
1066 /* Now absolutely destruct everything, somehow or other, loops or no. */
1068 /* the 2 is for PL_fdpid and PL_strtab */
1069 while (sv_clean_all() > 2)
1073 Safefree(PL_stashpad); /* must come after sv_clean_all */
1076 AvREAL_off(PL_fdpid); /* no surviving entries */
1077 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1080 #ifdef HAVE_INTERP_INTERN
1084 /* Destruct the global string table. */
1086 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1087 * so that sv_free() won't fail on them.
1088 * Now that the global string table is using a single hunk of memory
1089 * for both HE and HEK, we either need to explicitly unshare it the
1090 * correct way, or actually free things here.
1093 const I32 max = HvMAX(PL_strtab);
1094 HE * const * const array = HvARRAY(PL_strtab);
1095 HE *hent = array[0];
1098 if (hent && ckWARN_d(WARN_INTERNAL)) {
1099 HE * const next = HeNEXT(hent);
1100 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1101 "Unbalanced string table refcount: (%ld) for \"%s\"",
1102 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1109 hent = array[riter];
1114 HvARRAY(PL_strtab) = 0;
1115 HvTOTALKEYS(PL_strtab) = 0;
1117 SvREFCNT_dec(PL_strtab);
1120 /* free the pointer tables used for cloning */
1121 ptr_table_free(PL_ptr_table);
1122 PL_ptr_table = (PTR_TBL_t*)NULL;
1125 /* free special SVs */
1127 SvREFCNT(&PL_sv_yes) = 0;
1128 sv_clear(&PL_sv_yes);
1129 SvANY(&PL_sv_yes) = NULL;
1130 SvFLAGS(&PL_sv_yes) = 0;
1132 SvREFCNT(&PL_sv_no) = 0;
1133 sv_clear(&PL_sv_no);
1134 SvANY(&PL_sv_no) = NULL;
1135 SvFLAGS(&PL_sv_no) = 0;
1139 for (i=0; i<=2; i++) {
1140 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1141 sv_clear(PERL_DEBUG_PAD(i));
1142 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1143 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1147 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1148 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1150 #ifdef DEBUG_LEAKING_SCALARS
1151 if (PL_sv_count != 0) {
1156 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1157 svend = &sva[SvREFCNT(sva)];
1158 for (sv = sva + 1; sv < svend; ++sv) {
1159 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1160 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1162 " refcnt=%"UVuf pTHX__FORMAT "\n"
1163 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1165 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1167 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1169 sv->sv_debug_inpad ? "for" : "by",
1170 sv->sv_debug_optype ?
1171 PL_op_name[sv->sv_debug_optype]: "(none)",
1172 PTR2UV(sv->sv_debug_parent),
1175 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1176 Perl_dump_sv_child(aTHX_ sv);
1182 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1186 /* Wait for up to 4 seconds for child to terminate.
1187 This seems to be the least effort way of timing out on reaping
1189 struct timeval waitfor = {4, 0};
1190 int sock = PL_dumper_fd;
1194 FD_SET(sock, &rset);
1195 select(sock + 1, &rset, NULL, NULL, &waitfor);
1196 waitpid(child, &status, WNOHANG);
1201 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1207 #if defined(PERLIO_LAYERS)
1208 /* No more IO - including error messages ! */
1209 PerlIO_cleanup(aTHX);
1212 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1213 as currently layers use it rather than NULL as a marker
1214 for no arg - and will try and SvREFCNT_dec it.
1216 SvREFCNT(&PL_sv_undef) = 0;
1217 SvREADONLY_off(&PL_sv_undef);
1219 Safefree(PL_origfilename);
1220 PL_origfilename = NULL;
1221 Safefree(PL_reg_curpm);
1222 Safefree(PL_reg_poscache);
1223 free_tied_hv_pool();
1224 Safefree(PL_op_mask);
1225 Safefree(PL_psig_name);
1226 PL_psig_name = (SV**)NULL;
1227 PL_psig_ptr = (SV**)NULL;
1229 /* We need to NULL PL_psig_pend first, so that
1230 signal handlers know not to use it */
1231 int *psig_save = PL_psig_pend;
1232 PL_psig_pend = (int*)NULL;
1233 Safefree(psig_save);
1236 TAINTING_set(FALSE);
1237 TAINT_WARN_set(FALSE);
1238 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1241 DEBUG_P(debprofdump());
1243 #ifdef USE_REENTRANT_API
1244 Perl_reentrant_free(aTHX);
1249 while (PL_regmatch_slab) {
1250 regmatch_slab *s = PL_regmatch_slab;
1251 PL_regmatch_slab = PL_regmatch_slab->next;
1255 /* As the absolutely last thing, free the non-arena SV for mess() */
1258 /* we know that type == SVt_PVMG */
1260 /* it could have accumulated taint magic */
1263 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1264 moremagic = mg->mg_moremagic;
1265 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1267 Safefree(mg->mg_ptr);
1271 /* we know that type >= SVt_PV */
1272 SvPV_free(PL_mess_sv);
1273 Safefree(SvANY(PL_mess_sv));
1274 Safefree(PL_mess_sv);
1281 =for apidoc perl_free
1283 Releases a Perl interpreter. See L<perlembed>.
1293 PERL_ARGS_ASSERT_PERL_FREE;
1295 if (PL_veto_cleanup)
1298 #ifdef PERL_TRACK_MEMPOOL
1301 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1302 * value as we're probably hunting memory leaks then
1304 if (PL_perl_destruct_level == 0) {
1305 const U32 old_debug = PL_debug;
1306 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1307 thread at thread exit. */
1309 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1310 "free this thread's memory\n");
1311 PL_debug &= ~ DEBUG_m_FLAG;
1313 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1314 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1315 PL_debug = old_debug;
1320 #if defined(WIN32) || defined(NETWARE)
1321 # if defined(PERL_IMPLICIT_SYS)
1324 void *host = nw_internal_host;
1326 void *host = w32_internal_host;
1328 PerlMem_free(aTHXx);
1330 nw_delete_internal_host(host);
1332 win32_delete_internal_host(host);
1336 PerlMem_free(aTHXx);
1339 PerlMem_free(aTHXx);
1343 #if defined(USE_ITHREADS)
1344 /* provide destructors to clean up the thread key when libperl is unloaded */
1345 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1347 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1348 #pragma fini "perl_fini"
1349 #elif defined(__sun) && !defined(__GNUC__)
1350 #pragma fini (perl_fini)
1354 #if defined(__GNUC__)
1355 __attribute__((destructor))
1360 if (PL_curinterp && !PL_veto_cleanup)
1365 #endif /* THREADS */
1368 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1371 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1372 PL_exitlist[PL_exitlistlen].fn = fn;
1373 PL_exitlist[PL_exitlistlen].ptr = ptr;
1378 S_set_caret_X(pTHX) {
1380 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1382 SV *const caret_x = GvSV(tmpgv);
1384 sv_setpv(caret_x, os2_execname(aTHX));
1386 # ifdef USE_KERN_PROC_PATHNAME
1391 mib[2] = KERN_PROC_PATHNAME;
1394 if (sysctl(mib, 4, NULL, &size, NULL, 0) == 0
1395 && size > 0 && size < MAXPATHLEN * MAXPATHLEN) {
1396 sv_grow(caret_x, size);
1398 if (sysctl(mib, 4, SvPVX(caret_x), &size, NULL, 0) == 0
1400 SvPOK_only(caret_x);
1401 SvCUR_set(caret_x, size - 1);
1406 # elif defined(USE_NSGETEXECUTABLEPATH)
1408 uint32_t size = sizeof(buf);
1410 _NSGetExecutablePath(buf, &size);
1411 if (size < MAXPATHLEN * MAXPATHLEN) {
1412 sv_grow(caret_x, size);
1413 if (_NSGetExecutablePath(SvPVX(caret_x), &size) == 0) {
1414 char *const tidied = realpath(SvPVX(caret_x), NULL);
1416 sv_setpv(caret_x, tidied);
1419 SvPOK_only(caret_x);
1420 SvCUR_set(caret_x, size);
1425 # elif defined(HAS_PROCSELFEXE)
1426 char buf[MAXPATHLEN];
1427 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1429 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1430 includes a spurious NUL which will cause $^X to fail in system
1431 or backticks (this will prevent extensions from being built and
1432 many tests from working). readlink is not meant to add a NUL.
1433 Normal readlink works fine.
1435 if (len > 0 && buf[len-1] == '\0') {
1439 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1440 returning the text "unknown" from the readlink rather than the path
1441 to the executable (or returning an error from the readlink). Any
1442 valid path has a '/' in it somewhere, so use that to validate the
1443 result. See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1445 if (len > 0 && memchr(buf, '/', len)) {
1446 sv_setpvn(caret_x, buf, len);
1450 /* Fallback to this: */
1451 sv_setpv(caret_x, PL_origargv[0]);
1457 =for apidoc perl_parse
1459 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1464 #define SET_CURSTASH(newstash) \
1465 if (PL_curstash != newstash) { \
1466 SvREFCNT_dec(PL_curstash); \
1467 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1471 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1478 PERL_ARGS_ASSERT_PERL_PARSE;
1479 #ifndef MULTIPLICITY
1480 PERL_UNUSED_ARG(my_perl);
1482 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) || defined(USE_HASH_SEED_DEBUG)
1484 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1486 if (s && (atoi(s) == 1)) {
1487 unsigned char *seed= PERL_HASH_SEED;
1488 unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
1489 PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
1490 while (seed < seed_end) {
1491 PerlIO_printf(Perl_debug_log, "%02x", *seed++);
1493 PerlIO_printf(Perl_debug_log, "\n");
1496 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1500 if (PL_origalen != 0) {
1501 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1504 /* Set PL_origalen be the sum of the contiguous argv[]
1505 * elements plus the size of the env in case that it is
1506 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1507 * as the maximum modifiable length of $0. In the worst case
1508 * the area we are able to modify is limited to the size of
1509 * the original argv[0]. (See below for 'contiguous', though.)
1511 const char *s = NULL;
1514 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1515 /* Do the mask check only if the args seem like aligned. */
1517 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1519 /* See if all the arguments are contiguous in memory. Note
1520 * that 'contiguous' is a loose term because some platforms
1521 * align the argv[] and the envp[]. If the arguments look
1522 * like non-aligned, assume that they are 'strictly' or
1523 * 'traditionally' contiguous. If the arguments look like
1524 * aligned, we just check that they are within aligned
1525 * PTRSIZE bytes. As long as no system has something bizarre
1526 * like the argv[] interleaved with some other data, we are
1527 * fine. (Did I just evoke Murphy's Law?) --jhi */
1528 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1530 for (i = 1; i < PL_origargc; i++) {
1531 if ((PL_origargv[i] == s + 1
1533 || PL_origargv[i] == s + 2
1538 (PL_origargv[i] > s &&
1540 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1551 #ifndef PERL_USE_SAFE_PUTENV
1552 /* Can we grab env area too to be used as the area for $0? */
1553 if (s && PL_origenviron && !PL_use_safe_putenv) {
1554 if ((PL_origenviron[0] == s + 1)
1557 (PL_origenviron[0] > s &&
1558 PL_origenviron[0] <=
1559 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1562 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1563 s = PL_origenviron[0];
1566 my_setenv("NoNe SuCh", NULL);
1567 /* Force copy of environment. */
1568 for (i = 1; PL_origenviron[i]; i++) {
1569 if (PL_origenviron[i] == s + 1
1572 (PL_origenviron[i] > s &&
1573 PL_origenviron[i] <=
1574 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1577 s = PL_origenviron[i];
1585 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1587 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1592 /* Come here if running an undumped a.out. */
1594 PL_origfilename = savepv(argv[0]);
1595 PL_do_undump = FALSE;
1596 cxstack_ix = -1; /* start label stack again */
1598 assert (!TAINT_get);
1600 S_set_caret_X(aTHX);
1602 init_postdump_symbols(argc,argv,env);
1607 op_free(PL_main_root);
1608 PL_main_root = NULL;
1610 PL_main_start = NULL;
1611 SvREFCNT_dec(PL_main_cv);
1615 oldscope = PL_scopestack_ix;
1616 PL_dowarn = G_WARN_OFF;
1621 parse_body(env,xsinit);
1622 if (PL_unitcheckav) {
1623 call_list(oldscope, PL_unitcheckav);
1626 PERL_SET_PHASE(PERL_PHASE_CHECK);
1627 call_list(oldscope, PL_checkav);
1635 /* my_exit() was called */
1636 while (PL_scopestack_ix > oldscope)
1639 SET_CURSTASH(PL_defstash);
1640 if (PL_unitcheckav) {
1641 call_list(oldscope, PL_unitcheckav);
1644 PERL_SET_PHASE(PERL_PHASE_CHECK);
1645 call_list(oldscope, PL_checkav);
1650 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1658 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1659 miniperl, and we need to see those flags reflected in the values here. */
1661 /* What this returns is subject to change. Use the public interface in Config.
1664 S_Internals_V(pTHX_ CV *cv)
1667 #ifdef LOCAL_PATCH_COUNT
1668 const int local_patch_count = LOCAL_PATCH_COUNT;
1670 const int local_patch_count = 0;
1672 const int entries = 3 + local_patch_count;
1674 static const char non_bincompat_options[] =
1681 # ifdef PERL_DISABLE_PMC
1684 # ifdef PERL_DONT_CREATE_GVSV
1685 " PERL_DONT_CREATE_GVSV"
1687 # ifdef PERL_EXTERNAL_GLOB
1688 " PERL_EXTERNAL_GLOB"
1690 # ifdef PERL_IS_MINIPERL
1693 # ifdef PERL_MALLOC_WRAP
1696 # ifdef PERL_MEM_LOG
1699 # ifdef PERL_MEM_LOG_NOIMPL
1700 " PERL_MEM_LOG_NOIMPL"
1702 # ifdef PERL_PRESERVE_IVUV
1703 " PERL_PRESERVE_IVUV"
1705 # ifdef PERL_RELOCATABLE_INCPUSH
1706 " PERL_RELOCATABLE_INCPUSH"
1708 # ifdef PERL_USE_DEVEL
1711 # ifdef PERL_USE_SAFE_PUTENV
1712 " PERL_USE_SAFE_PUTENV"
1714 # ifdef UNLINK_ALL_VERSIONS
1715 " UNLINK_ALL_VERSIONS"
1717 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1718 " USE_ATTRIBUTES_FOR_PERLIO"
1720 # ifdef USE_FAST_STDIO
1726 # ifdef USE_LOCALE_CTYPE
1729 # ifdef USE_PERL_ATOF
1732 # ifdef USE_SITECUSTOMIZE
1733 " USE_SITECUSTOMIZE"
1736 PERL_UNUSED_ARG(cv);
1737 PERL_UNUSED_ARG(items);
1739 EXTEND(SP, entries);
1741 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1742 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1743 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1747 PUSHs(Perl_newSVpvn_flags(aTHX_
1748 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1751 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1755 PUSHs(&PL_sv_undef);
1758 for (i = 1; i <= local_patch_count; i++) {
1759 /* This will be an undef, if PL_localpatches[i] is NULL. */
1760 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1766 #define INCPUSH_UNSHIFT 0x01
1767 #define INCPUSH_ADD_OLD_VERS 0x02
1768 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1769 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1770 #define INCPUSH_NOT_BASEDIR 0x10
1771 #define INCPUSH_CAN_RELOCATE 0x20
1772 #define INCPUSH_ADD_SUB_DIRS \
1773 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1776 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1780 int argc = PL_origargc;
1781 char **argv = PL_origargv;
1782 const char *scriptname = NULL;
1783 VOL bool dosearch = FALSE;
1785 bool doextract = FALSE;
1786 const char *cddir = NULL;
1787 #ifdef USE_SITECUSTOMIZE
1788 bool minus_f = FALSE;
1790 SV *linestr_sv = NULL;
1791 bool add_read_e_script = FALSE;
1792 U32 lex_start_flags = 0;
1794 PERL_SET_PHASE(PERL_PHASE_START);
1800 for (argc--,argv++; argc > 0; argc--,argv++) {
1801 if (argv[0][0] != '-' || !argv[0][1])
1807 #ifndef PERL_STRICT_CR
1831 if ((s = moreswitches(s)))
1836 #if SILENT_NO_TAINT_SUPPORT
1837 /* silently ignore */
1838 #elif NO_TAINT_SUPPORT
1839 Perl_croak("This perl was compiled without taint support. "
1840 "Cowardly refusing to run with -t or -T flags");
1842 CHECK_MALLOC_TOO_LATE_FOR('t');
1843 if( !TAINTING_get ) {
1844 TAINT_WARN_set(TRUE);
1851 #if SILENT_NO_TAINT_SUPPORT
1852 /* silently ignore */
1853 #elif NO_TAINT_SUPPORT
1854 Perl_croak("This perl was compiled without taint support. "
1855 "Cowardly refusing to run with -t or -T flags");
1857 CHECK_MALLOC_TOO_LATE_FOR('T');
1859 TAINT_WARN_set(FALSE);
1868 forbid_setid('e', FALSE);
1870 PL_e_script = newSVpvs("");
1871 add_read_e_script = TRUE;
1874 sv_catpv(PL_e_script, s);
1876 sv_catpv(PL_e_script, argv[1]);
1880 Perl_croak(aTHX_ "No code specified for -%c", c);
1881 sv_catpvs(PL_e_script, "\n");
1885 #ifdef USE_SITECUSTOMIZE
1891 case 'I': /* -I handled both here and in moreswitches() */
1892 forbid_setid('I', FALSE);
1893 if (!*++s && (s=argv[1]) != NULL) {
1897 STRLEN len = strlen(s);
1898 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1901 Perl_croak(aTHX_ "No directory specified for -I");
1904 forbid_setid('S', FALSE);
1913 opts_prog = newSVpvs("use Config; Config::_V()");
1917 opts_prog = Perl_newSVpvf(aTHX_
1918 "use Config; Config::config_vars(qw%c%s%c)",
1922 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1923 /* don't look for script or read stdin */
1924 scriptname = BIT_BUCKET;
1936 if (!*++s || isSPACE(*s)) {
1940 /* catch use of gnu style long options.
1941 Both of these exit immediately. */
1942 if (strEQ(s, "version"))
1944 if (strEQ(s, "help"))
1949 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1960 #ifndef SECURE_INTERNAL_GETENV
1963 (s = PerlEnv_getenv("PERL5OPT")))
1967 if (*s == '-' && *(s+1) == 'T') {
1968 #if SILENT_NO_TAINT_SUPPORT
1969 /* silently ignore */
1970 #elif NO_TAINT_SUPPORT
1971 Perl_croak("This perl was compiled without taint support. "
1972 "Cowardly refusing to run with -t or -T flags");
1974 CHECK_MALLOC_TOO_LATE_FOR('T');
1976 TAINT_WARN_set(FALSE);
1980 char *popt_copy = NULL;
1993 if (!strchr("CDIMUdmtwW", *s))
1994 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1998 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1999 s = popt_copy + (s - d);
2007 #if SILENT_NO_TAINT_SUPPORT
2008 /* silently ignore */
2009 #elif NO_TAINT_SUPPORT
2010 Perl_croak("This perl was compiled without taint support. "
2011 "Cowardly refusing to run with -t or -T flags");
2013 if( !TAINTING_get) {
2014 TAINT_WARN_set(TRUE);
2026 /* Set $^X early so that it can be used for relocatable paths in @INC */
2027 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2028 assert (!TAINT_get);
2030 S_set_caret_X(aTHX);
2033 #if defined(USE_SITECUSTOMIZE)
2035 /* The games with local $! are to avoid setting errno if there is no
2036 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2037 ie a q() operator with a NUL byte as a the delimiter. This avoids
2038 problems with pathnames containing (say) ' */
2039 # ifdef PERL_IS_MINIPERL
2040 AV *const inc = GvAV(PL_incgv);
2041 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2044 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2046 "BEGIN { do {local $!; -f q%c%"SVf"/buildcustomize.pl%c} && do q%c%"SVf"/buildcustomize.pl%c }",
2051 /* SITELIB_EXP is a function call on Win32. */
2052 const char *const raw_sitelib = SITELIB_EXP;
2054 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2055 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2056 INCPUSH_CAN_RELOCATE);
2057 const char *const sitelib = SvPVX(sitelib_sv);
2058 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2060 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2063 assert (SvREFCNT(sitelib_sv) == 1);
2064 SvREFCNT_dec(sitelib_sv);
2071 scriptname = argv[0];
2074 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2076 else if (scriptname == NULL) {
2078 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2084 assert (!TAINT_get);
2088 bool suidscript = FALSE;
2090 rsfp = open_script(scriptname, dosearch, &suidscript);
2092 rsfp = PerlIO_stdin();
2093 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2096 validate_suid(rsfp);
2099 # if defined(SIGCHLD) || defined(SIGCLD)
2102 # define SIGCHLD SIGCLD
2104 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2105 if (sigstate == (Sighandler_t) SIG_IGN) {
2106 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2107 "Can't ignore signal CHLD, forcing to default");
2108 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2116 /* This will croak if suidscript is true, as -x cannot be used with
2118 forbid_setid('x', suidscript);
2119 /* Hence you can't get here if suidscript is true */
2121 linestr_sv = newSV_type(SVt_PV);
2122 lex_start_flags |= LEX_START_COPIED;
2123 find_beginning(linestr_sv, rsfp);
2124 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2125 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2129 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2130 CvUNIQUE_on(PL_compcv);
2132 CvPADLIST(PL_compcv) = pad_new(0);
2134 PL_isarev = newHV();
2137 boot_core_UNIVERSAL();
2139 newXS("Internals::V", S_Internals_V, __FILE__);
2142 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2144 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(SYMBIAN)
2150 # ifdef HAS_SOCKS5_INIT
2151 socks5_init(argv[0]);
2157 init_predump_symbols();
2158 /* init_postdump_symbols not currently designed to be called */
2159 /* more than once (ENV isn't cleared first, for example) */
2160 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2162 init_postdump_symbols(argc,argv,env);
2164 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2165 * or explicitly in some platforms.
2166 * locale.c:Perl_init_i18nl10n() if the environment
2167 * look like the user wants to use UTF-8. */
2168 #if defined(__SYMBIAN32__)
2169 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2171 # ifndef PERL_IS_MINIPERL
2173 /* Requires init_predump_symbols(). */
2174 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2179 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2180 * and the default open disciplines. */
2181 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2182 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2184 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2185 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2186 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2188 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2189 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2190 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2192 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2193 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2194 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2196 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2197 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2200 sv_setpvs(sv, ":utf8\0:utf8");
2202 sv_setpvs(sv, ":utf8\0");
2205 sv_setpvs(sv, "\0:utf8");
2214 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2215 if (strEQ(s, "unsafe"))
2216 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2217 else if (strEQ(s, "safe"))
2218 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2220 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2227 if (!TAINTING_get &&
2228 (s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2232 PL_xmlfp = PerlIO_stdout();
2234 PL_xmlfp = PerlIO_open(s, "w");
2236 Perl_croak(aTHX_ "Can't open %s", s);
2238 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2244 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2245 PL_madskills = atoi(s);
2246 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2251 lex_start(linestr_sv, rsfp, lex_start_flags);
2252 SvREFCNT_dec(linestr_sv);
2254 PL_subname = newSVpvs("main");
2256 if (add_read_e_script)
2257 filter_add(read_e_script, NULL);
2259 /* now parse the script */
2261 SETERRNO(0,SS_NORMAL);
2262 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2264 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2266 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2270 CopLINE_set(PL_curcop, 0);
2271 SET_CURSTASH(PL_defstash);
2273 SvREFCNT_dec(PL_e_script);
2281 SAVECOPFILE(PL_curcop);
2282 SAVECOPLINE(PL_curcop);
2283 gv_check(PL_defstash);
2292 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2293 dump_mstats("after compilation:");
2298 PL_restartjmpenv = NULL;
2304 =for apidoc perl_run
2306 Tells a Perl interpreter to run. See L<perlembed>.
2319 PERL_ARGS_ASSERT_PERL_RUN;
2320 #ifndef MULTIPLICITY
2321 PERL_UNUSED_ARG(my_perl);
2324 oldscope = PL_scopestack_ix;
2332 cxstack_ix = -1; /* start context stack again */
2334 case 0: /* normal completion */
2338 case 2: /* my_exit() */
2339 while (PL_scopestack_ix > oldscope)
2342 SET_CURSTASH(PL_defstash);
2343 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2344 PL_endav && !PL_minus_c) {
2345 PERL_SET_PHASE(PERL_PHASE_END);
2346 call_list(oldscope, PL_endav);
2349 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2350 dump_mstats("after execution: ");
2356 POPSTACK_TO(PL_mainstack);
2359 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2370 S_run_body(pTHX_ I32 oldscope)
2373 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2374 PL_sawampersand ? "Enabling" : "Omitting",
2375 (unsigned int)(PL_sawampersand)));
2377 if (!PL_restartop) {
2381 exit(0); /* less likely to core dump than my_exit(0) */
2385 if (DEBUG_x_TEST || DEBUG_B_TEST)
2386 dump_all_perl(!DEBUG_B_TEST);
2388 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2392 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2395 if (PERLDB_SINGLE && PL_DBsingle)
2396 sv_setiv(PL_DBsingle, 1);
2398 PERL_SET_PHASE(PERL_PHASE_INIT);
2399 call_list(oldscope, PL_initav);
2401 #ifdef PERL_DEBUG_READONLY_OPS
2402 if (PL_main_root && PL_main_root->op_slabbed)
2403 Slab_to_ro(OpSLAB(PL_main_root));
2409 PERL_SET_PHASE(PERL_PHASE_RUN);
2412 PL_restartjmpenv = NULL;
2413 PL_op = PL_restartop;
2417 else if (PL_main_start) {
2418 CvDEPTH(PL_main_cv) = 1;
2419 PL_op = PL_main_start;
2423 assert(0); /* NOTREACHED */
2427 =head1 SV Manipulation Functions
2429 =for apidoc p||get_sv
2431 Returns the SV of the specified Perl scalar. C<flags> are passed to
2432 C<gv_fetchpv>. If C<GV_ADD> is set and the
2433 Perl variable does not exist then it will be created. If C<flags> is zero
2434 and the variable does not exist then NULL is returned.
2440 Perl_get_sv(pTHX_ const char *name, I32 flags)
2444 PERL_ARGS_ASSERT_GET_SV;
2446 gv = gv_fetchpv(name, flags, SVt_PV);
2453 =head1 Array Manipulation Functions
2455 =for apidoc p||get_av
2457 Returns the AV of the specified Perl global or package array with the given
2458 name (so it won't work on lexical variables). C<flags> are passed
2459 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2460 Perl variable does not exist then it will be created. If C<flags> is zero
2461 and the variable does not exist then NULL is returned.
2463 Perl equivalent: C<@{"$name"}>.
2469 Perl_get_av(pTHX_ const char *name, I32 flags)
2471 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2473 PERL_ARGS_ASSERT_GET_AV;
2483 =head1 Hash Manipulation Functions
2485 =for apidoc p||get_hv
2487 Returns the HV of the specified Perl hash. C<flags> are passed to
2488 C<gv_fetchpv>. If C<GV_ADD> is set and the
2489 Perl variable does not exist then it will be created. If C<flags> is zero
2490 and the variable does not exist then NULL is returned.
2496 Perl_get_hv(pTHX_ const char *name, I32 flags)
2498 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2500 PERL_ARGS_ASSERT_GET_HV;
2510 =head1 CV Manipulation Functions
2512 =for apidoc p||get_cvn_flags
2514 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2515 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2516 exist then it will be declared (which has the same effect as saying
2517 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2518 then NULL is returned.
2520 =for apidoc p||get_cv
2522 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2528 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2530 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2532 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2534 /* XXX this is probably not what they think they're getting.
2535 * It has the same effect as "sub name;", i.e. just a forward
2537 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2538 return newSTUB(gv,0);
2545 /* Nothing in core calls this now, but we can't replace it with a macro and
2546 move it to mathoms.c as a macro would evaluate name twice. */
2548 Perl_get_cv(pTHX_ const char *name, I32 flags)
2550 PERL_ARGS_ASSERT_GET_CV;
2552 return get_cvn_flags(name, strlen(name), flags);
2555 /* Be sure to refetch the stack pointer after calling these routines. */
2559 =head1 Callback Functions
2561 =for apidoc p||call_argv
2563 Performs a callback to the specified named and package-scoped Perl subroutine
2564 with C<argv> (a NULL-terminated array of strings) as arguments. See L<perlcall>.
2566 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2572 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2574 /* See G_* flags in cop.h */
2575 /* null terminated arg list */
2580 PERL_ARGS_ASSERT_CALL_ARGV;
2585 mXPUSHs(newSVpv(*argv,0));
2590 return call_pv(sub_name, flags);
2594 =for apidoc p||call_pv
2596 Performs a callback to the specified Perl sub. See L<perlcall>.
2602 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2603 /* name of the subroutine */
2604 /* See G_* flags in cop.h */
2606 PERL_ARGS_ASSERT_CALL_PV;
2608 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2612 =for apidoc p||call_method
2614 Performs a callback to the specified Perl method. The blessed object must
2615 be on the stack. See L<perlcall>.
2621 Perl_call_method(pTHX_ const char *methname, I32 flags)
2622 /* name of the subroutine */
2623 /* See G_* flags in cop.h */
2626 PERL_ARGS_ASSERT_CALL_METHOD;
2628 len = strlen(methname);
2630 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2631 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2634 /* May be called with any of a CV, a GV, or an SV containing the name. */
2636 =for apidoc p||call_sv
2638 Performs a callback to the Perl sub whose name is in the SV. See
2645 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2646 /* See G_* flags in cop.h */
2649 LOGOP myop; /* fake syntax tree node */
2654 bool oldcatch = CATCH_GET;
2656 OP* const oldop = PL_op;
2659 PERL_ARGS_ASSERT_CALL_SV;
2661 if (flags & G_DISCARD) {
2665 if (!(flags & G_WANT)) {
2666 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2671 Zero(&myop, 1, LOGOP);
2672 if (!(flags & G_NOARGS))
2673 myop.op_flags |= OPf_STACKED;
2674 myop.op_flags |= OP_GIMME_REVERSE(flags);
2678 EXTEND(PL_stack_sp, 1);
2679 *++PL_stack_sp = sv;
2681 oldscope = PL_scopestack_ix;
2683 if (PERLDB_SUB && PL_curstash != PL_debstash
2684 /* Handle first BEGIN of -d. */
2685 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2686 /* Try harder, since this may have been a sighandler, thus
2687 * curstash may be meaningless. */
2688 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2689 && !(flags & G_NODEBUG))
2690 myop.op_private |= OPpENTERSUB_DB;
2692 if (flags & G_METHOD) {
2693 Zero(&method_op, 1, UNOP);
2694 method_op.op_next = (OP*)&myop;
2695 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2696 method_op.op_type = OP_METHOD;
2697 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2698 myop.op_type = OP_ENTERSUB;
2699 PL_op = (OP*)&method_op;
2702 if (!(flags & G_EVAL)) {
2704 CALL_BODY_SUB((OP*)&myop);
2705 retval = PL_stack_sp - (PL_stack_base + oldmark);
2706 CATCH_SET(oldcatch);
2709 myop.op_other = (OP*)&myop;
2711 create_eval_scope(flags|G_FAKINGEVAL);
2719 CALL_BODY_SUB((OP*)&myop);
2720 retval = PL_stack_sp - (PL_stack_base + oldmark);
2721 if (!(flags & G_KEEPERR)) {
2729 /* my_exit() was called */
2730 SET_CURSTASH(PL_defstash);
2734 assert(0); /* NOTREACHED */
2737 PL_restartjmpenv = NULL;
2738 PL_op = PL_restartop;
2742 PL_stack_sp = PL_stack_base + oldmark;
2743 if ((flags & G_WANT) == G_ARRAY)
2747 *++PL_stack_sp = &PL_sv_undef;
2752 if (PL_scopestack_ix > oldscope)
2753 delete_eval_scope();
2757 if (flags & G_DISCARD) {
2758 PL_stack_sp = PL_stack_base + oldmark;
2767 /* Eval a string. The G_EVAL flag is always assumed. */
2770 =for apidoc p||eval_sv
2772 Tells Perl to C<eval> the string in the SV. It supports the same flags
2773 as C<call_sv>, with the obvious exception of G_EVAL. See L<perlcall>.
2779 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2781 /* See G_* flags in cop.h */
2785 UNOP myop; /* fake syntax tree node */
2786 VOL I32 oldmark = SP - PL_stack_base;
2789 OP* const oldop = PL_op;
2792 PERL_ARGS_ASSERT_EVAL_SV;
2794 if (flags & G_DISCARD) {
2801 Zero(&myop, 1, UNOP);
2802 EXTEND(PL_stack_sp, 1);
2803 *++PL_stack_sp = sv;
2805 if (!(flags & G_NOARGS))
2806 myop.op_flags = OPf_STACKED;
2807 myop.op_type = OP_ENTEREVAL;
2808 myop.op_flags |= OP_GIMME_REVERSE(flags);
2809 if (flags & G_KEEPERR)
2810 myop.op_flags |= OPf_SPECIAL;
2811 if (PL_reg_state.re_reparsing)
2812 myop.op_private = OPpEVAL_COPHH;
2814 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2815 * before a PUSHEVAL, which corrupts the stack after a croak */
2816 TAINT_PROPER("eval_sv()");
2822 if (PL_op == (OP*)(&myop)) {
2823 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2825 goto fail; /* failed in compilation */
2828 retval = PL_stack_sp - (PL_stack_base + oldmark);
2829 if (!(flags & G_KEEPERR)) {
2837 /* my_exit() was called */
2838 SET_CURSTASH(PL_defstash);
2842 assert(0); /* NOTREACHED */
2845 PL_restartjmpenv = NULL;
2846 PL_op = PL_restartop;
2851 PL_stack_sp = PL_stack_base + oldmark;
2852 if ((flags & G_WANT) == G_ARRAY)
2856 *++PL_stack_sp = &PL_sv_undef;
2862 if (flags & G_DISCARD) {
2863 PL_stack_sp = PL_stack_base + oldmark;
2873 =for apidoc p||eval_pv
2875 Tells Perl to C<eval> the given string and return an SV* result.
2881 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2884 SV* sv = newSVpv(p, 0);
2886 PERL_ARGS_ASSERT_EVAL_PV;
2888 eval_sv(sv, G_SCALAR);
2897 /* just check empty string or undef? */
2898 if (croak_on_error) {
2899 SV * const errsv = ERRSV;
2900 if(SvTRUE_NN(errsv))
2901 /* replace with croak_sv? */
2902 Perl_croak_nocontext("%s", SvPV_nolen_const(errsv));
2908 /* Require a module. */
2911 =head1 Embedding Functions
2913 =for apidoc p||require_pv
2915 Tells Perl to C<require> the file named by the string argument. It is
2916 analogous to the Perl code C<eval "require '$file'">. It's even
2917 implemented that way; consider using load_module instead.
2922 Perl_require_pv(pTHX_ const char *pv)
2928 PERL_ARGS_ASSERT_REQUIRE_PV;
2930 PUSHSTACKi(PERLSI_REQUIRE);
2932 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2933 eval_sv(sv_2mortal(sv), G_DISCARD);
2939 S_usage(pTHX) /* XXX move this out into a module ? */
2941 /* This message really ought to be max 23 lines.
2942 * Removed -h because the user already knows that option. Others? */
2944 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2945 minimum of 509 character string literals. */
2946 static const char * const usage_msg[] = {
2947 " -0[octal] specify record separator (\\0, if no argument)\n"
2948 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2949 " -C[number/list] enables the listed Unicode features\n"
2950 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2951 " -d[:debugger] run program under debugger\n"
2952 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2953 " -e program one line of program (several -e's allowed, omit programfile)\n"
2954 " -E program like -e, but enables all optional features\n"
2955 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2956 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2957 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2958 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2959 " -l[octal] enable line ending processing, specifies line terminator\n"
2960 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2961 " -n assume \"while (<>) { ... }\" loop around program\n"
2962 " -p assume loop like -n but print line also, like sed\n"
2963 " -s enable rudimentary parsing for switches after programfile\n"
2964 " -S look for programfile using PATH environment variable\n",
2965 " -t enable tainting warnings\n"
2966 " -T enable tainting checks\n"
2967 " -u dump core after parsing program\n"
2968 " -U allow unsafe operations\n"
2969 " -v print version, patchlevel and license\n"
2970 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2971 " -w enable many useful warnings\n"
2972 " -W enable all warnings\n"
2973 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2974 " -X disable all warnings\n"
2976 "Run 'perldoc perl' for more help with Perl.\n\n",
2979 const char * const *p = usage_msg;
2980 PerlIO *out = PerlIO_stdout();
2983 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2986 PerlIO_puts(out, *p++);
2990 /* convert a string of -D options (or digits) into an int.
2991 * sets *s to point to the char after the options */
2995 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2997 static const char * const usage_msgd[] = {
2998 " Debugging flag values: (see also -d)\n"
2999 " p Tokenizing and parsing (with v, displays parse stack)\n"
3000 " s Stack snapshots (with v, displays all stacks)\n"
3001 " l Context (loop) stack processing\n"
3002 " t Trace execution\n"
3003 " o Method and overloading resolution\n",
3004 " c String/numeric conversions\n"
3005 " P Print profiling info, source file input state\n"
3006 " m Memory and SV allocation\n"
3007 " f Format processing\n"
3008 " r Regular expression parsing and execution\n"
3009 " x Syntax tree dump\n",
3010 " u Tainting checks\n"
3011 " H Hash dump -- usurps values()\n"
3012 " X Scratchpad allocation\n"
3014 " S Op slab allocation\n"
3016 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3017 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3018 " v Verbose: use in conjunction with other flags\n"
3019 " C Copy On Write\n"
3020 " A Consistency checks on internal structures\n"
3021 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3022 " M trace smart match resolution\n"
3023 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3028 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3031 /* if adding extra options, remember to update DEBUG_MASK */
3032 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
3034 for (; isWORDCHAR(**s); (*s)++) {
3035 const char * const d = strchr(debopts,**s);
3037 i |= 1 << (d - debopts);
3038 else if (ckWARN_d(WARN_DEBUGGING))
3039 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3040 "invalid option -D%c, use -D'' to see choices\n", **s);
3043 else if (isDIGIT(**s)) {
3045 for (; isWORDCHAR(**s); (*s)++) ;
3047 else if (givehelp) {
3048 const char *const *p = usage_msgd;
3049 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3052 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3053 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3054 "-Dp not implemented on this platform\n");
3060 /* This routine handles any switches that can be given during run */
3063 Perl_moreswitches(pTHX_ const char *s)
3067 const char option = *s; /* used to remember option in -m/-M code */
3069 PERL_ARGS_ASSERT_MORESWITCHES;
3077 SvREFCNT_dec(PL_rs);
3078 if (s[1] == 'x' && s[2]) {
3079 const char *e = s+=2;
3085 flags = PERL_SCAN_SILENT_ILLDIGIT;
3086 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3087 if (s + numlen < e) {
3088 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3092 PL_rs = newSVpvs("");
3093 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3094 tmps = (U8*)SvPVX(PL_rs);
3095 uvchr_to_utf8(tmps, rschar);
3096 SvCUR_set(PL_rs, UNISKIP(rschar));
3101 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3102 if (rschar & ~((U8)~0))
3103 PL_rs = &PL_sv_undef;
3104 else if (!rschar && numlen >= 2)
3105 PL_rs = newSVpvs("");
3107 char ch = (char)rschar;
3108 PL_rs = newSVpvn(&ch, 1);
3111 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3116 PL_unicode = parse_unicode_opts( (const char **)&s );
3117 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3123 while (*s && !isSPACE(*s)) ++s;
3124 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3135 forbid_setid('d', FALSE);
3138 /* -dt indicates to the debugger that threads will be used */
3139 if (*s == 't' && !isWORDCHAR(s[1])) {
3141 my_setenv("PERL5DB_THREADED", "1");
3144 /* The following permits -d:Mod to accepts arguments following an =
3145 in the fashion that -MSome::Mod does. */
3146 if (*s == ':' || *s == '=') {
3153 sv = newSVpvs("no Devel::");
3155 sv = newSVpvs("use Devel::");
3159 end = s + strlen(s);
3161 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3162 while(isWORDCHAR(*s) || *s==':') ++s;
3164 sv_catpvn(sv, start, end - start);
3166 sv_catpvn(sv, start, s-start);
3167 /* Don't use NUL as q// delimiter here, this string goes in the
3169 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3172 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3176 PL_perldb = PERLDB_ALL;
3183 forbid_setid('D', FALSE);
3185 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3186 #else /* !DEBUGGING */
3187 if (ckWARN_d(WARN_DEBUGGING))
3188 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3189 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3190 for (s++; isWORDCHAR(*s); s++) ;
3197 Safefree(PL_inplace);
3198 #if defined(__CYGWIN__) /* do backup extension automagically */
3199 if (*(s+1) == '\0') {
3200 PL_inplace = savepvs(".bak");
3203 #endif /* __CYGWIN__ */
3205 const char * const start = ++s;
3206 while (*s && !isSPACE(*s))
3209 PL_inplace = savepvn(start, s - start);
3213 if (*s == '-') /* Additional switches on #! line. */
3217 case 'I': /* -I handled both here and in parse_body() */
3218 forbid_setid('I', FALSE);
3220 while (*s && isSPACE(*s))
3225 /* ignore trailing spaces (possibly followed by other switches) */
3227 for (e = p; *e && !isSPACE(*e); e++) ;
3231 } while (*p && *p != '-');
3233 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3239 Perl_croak(aTHX_ "No directory specified for -I");
3245 SvREFCNT_dec(PL_ors_sv);
3251 PL_ors_sv = newSVpvs("\n");
3252 numlen = 3 + (*s == '0');
3253 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3257 if (RsPARA(PL_rs)) {
3258 PL_ors_sv = newSVpvs("\n\n");
3261 PL_ors_sv = newSVsv(PL_rs);
3266 forbid_setid('M', FALSE); /* XXX ? */
3269 forbid_setid('m', FALSE); /* XXX ? */
3274 const char *use = "use ";
3276 /* -M-foo == 'no foo' */
3277 /* Leading space on " no " is deliberate, to make both
3278 possibilities the same length. */
3279 if (*s == '-') { use = " no "; ++s; }
3280 sv = newSVpvn(use,4);
3282 /* We allow -M'Module qw(Foo Bar)' */
3283 while(isWORDCHAR(*s) || *s==':') {
3292 Perl_croak(aTHX_ "Module name required with -%c option",
3295 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3296 "contains single ':'",
3297 (int)(s - start), start, option);
3298 end = s + strlen(s);
3300 sv_catpvn(sv, start, end - start);
3301 if (option == 'm') {
3303 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3304 sv_catpvs( sv, " ()");
3307 sv_catpvn(sv, start, s-start);
3308 /* Use NUL as q''-delimiter. */
3309 sv_catpvs(sv, " split(/,/,q\0");
3311 sv_catpvn(sv, s, end - s);
3312 sv_catpvs(sv, "\0)");
3315 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3318 Perl_croak(aTHX_ "Missing argument to -%c", option);
3329 forbid_setid('s', FALSE);
3330 PL_doswitches = TRUE;
3335 #if SILENT_NO_TAINT_SUPPORT
3336 /* silently ignore */
3337 #elif NO_TAINT_SUPPORT
3338 Perl_croak("This perl was compiled without taint support. "
3339 "Cowardly refusing to run with -t or -T flags");
3347 PL_do_undump = TRUE;
3357 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3358 PL_dowarn |= G_WARN_ON;
3363 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3364 if (!specialWARN(PL_compiling.cop_warnings))
3365 PerlMemShared_free(PL_compiling.cop_warnings);
3366 PL_compiling.cop_warnings = pWARN_ALL ;
3370 PL_dowarn = G_WARN_ALL_OFF;
3371 if (!specialWARN(PL_compiling.cop_warnings))
3372 PerlMemShared_free(PL_compiling.cop_warnings);
3373 PL_compiling.cop_warnings = pWARN_NONE ;
3380 if (s[0] == '-') /* Additional switches on #! line. */
3385 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3391 #ifdef ALTERNATE_SHEBANG
3392 case 'S': /* OS/2 needs -S on "extproc" line. */
3395 case 'e': case 'f': case 'x': case 'E':
3396 #ifndef ALTERNATE_SHEBANG
3400 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3403 "Unrecognized switch: -%.1s (-h will show valid options)",s
3413 PerlIO * PIO_stdout;
3414 if (!sv_derived_from(PL_patchlevel, "version"))
3415 upg_version(PL_patchlevel, TRUE);
3418 SV* level= vstringify(PL_patchlevel);
3419 #ifdef PERL_PATCHNUM
3420 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3421 SV *num = newSVpvs(PERL_PATCHNUM "*");
3423 SV *num = newSVpvs(PERL_PATCHNUM);
3426 STRLEN level_len, num_len;
3427 char * level_str, * num_str;
3428 num_str = SvPV(num, num_len);
3429 level_str = SvPV(level, level_len);
3430 if (num_len>=level_len && strnEQ(num_str,level_str,level_len)) {
3431 SvREFCNT_dec(level);
3434 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3439 PIO_stdout = PerlIO_stdout();
3440 PerlIO_printf(PIO_stdout,
3441 "\nThis is perl " STRINGIFY(PERL_REVISION)
3442 ", version " STRINGIFY(PERL_VERSION)
3443 ", subversion " STRINGIFY(PERL_SUBVERSION)
3444 " (%"SVf") built for " ARCHNAME, level
3446 SvREFCNT_dec(level);
3449 PIO_stdout = PerlIO_stdout();
3450 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3451 PerlIO_printf(PIO_stdout,
3452 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3453 SVfARG(vstringify(PL_patchlevel))));
3454 PerlIO_printf(PIO_stdout,
3455 Perl_form(aTHX_ " built under %s at %s %s\n",
3456 OSNAME, __DATE__, __TIME__));
3457 PerlIO_printf(PIO_stdout,
3458 Perl_form(aTHX_ " OS Specific Release: %s\n",
3461 #if defined(LOCAL_PATCH_COUNT)
3462 if (LOCAL_PATCH_COUNT > 0)
3463 PerlIO_printf(PIO_stdout,
3464 "\n(with %d registered patch%s, "
3465 "see perl -V for more detail)",
3467 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3470 PerlIO_printf(PIO_stdout,
3471 "\n\nCopyright 1987-2013, Larry Wall\n");
3473 PerlIO_printf(PIO_stdout,
3474 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3477 PerlIO_printf(PIO_stdout,
3478 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3479 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3482 PerlIO_printf(PIO_stdout,
3483 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3484 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3487 PerlIO_printf(PIO_stdout,
3488 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3491 PerlIO_printf(PIO_stdout,
3492 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3495 PerlIO_printf(PIO_stdout,
3496 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3499 PerlIO_printf(PIO_stdout,
3500 "WINCE port by Rainer Keuchel, 2001-2002\n"
3501 "Built on " __DATE__ " " __TIME__ "\n\n");
3504 #ifdef __SYMBIAN32__
3505 PerlIO_printf(PIO_stdout,
3506 "Symbian port by Nokia, 2004-2005\n");
3508 #ifdef BINARY_BUILD_NOTICE
3509 BINARY_BUILD_NOTICE;
3511 PerlIO_printf(PIO_stdout,
3513 Perl may be copied only under the terms of either the Artistic License or the\n\
3514 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3515 Complete documentation for Perl, including FAQ lists, should be found on\n\
3516 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3517 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3521 /* compliments of Tom Christiansen */
3523 /* unexec() can be found in the Gnu emacs distribution */
3524 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3527 #include <lib$routines.h>
3531 Perl_my_unexec(pTHX)
3533 PERL_UNUSED_CONTEXT;
3535 SV * prog = newSVpv(BIN_EXP, 0);
3536 SV * file = newSVpv(PL_origfilename, 0);
3540 sv_catpvs(prog, "/perl");
3541 sv_catpvs(file, ".perldump");
3543 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3544 /* unexec prints msg to stderr in case of failure */
3545 PerlProc_exit(status);
3548 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3549 # elif defined(WIN32) || defined(__CYGWIN__)
3550 Perl_croak(aTHX_ "dump is not supported");
3552 ABORT(); /* for use with undump */
3557 /* initialize curinterp */
3563 # define PERLVAR(prefix,var,type)
3564 # define PERLVARA(prefix,var,n,type)
3565 # if defined(PERL_IMPLICIT_CONTEXT)
3566 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3567 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3569 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3570 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3572 # include "intrpvar.h"
3578 # define PERLVAR(prefix,var,type)
3579 # define PERLVARA(prefix,var,n,type)
3580 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3581 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3582 # include "intrpvar.h"
3589 /* As these are inside a structure, PERLVARI isn't capable of initialising
3591 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3592 PL_reg_poscache = PL_reg_starttry = NULL;
3596 S_init_main_stash(pTHX)
3601 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(newHV());
3602 /* We know that the string "main" will be in the global shared string
3603 table, so it's a small saving to use it rather than allocate another
3605 PL_curstname = newSVpvs_share("main");
3606 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3607 /* If we hadn't caused another reference to "main" to be in the shared
3608 string table above, then it would be worth reordering these two,
3609 because otherwise all we do is delete "main" from it as a consequence
3610 of the SvREFCNT_dec, only to add it again with hv_name_set */
3611 SvREFCNT_dec(GvHV(gv));
3612 hv_name_set(PL_defstash, "main", 4, 0);
3613 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3615 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3617 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3618 GvMULTI_on(PL_incgv);
3619 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3620 GvMULTI_on(PL_hintgv);
3621 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3622 SvREFCNT_inc_simple_void(PL_defgv);
3623 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3624 SvREFCNT_inc_simple_void(PL_errgv);
3625 GvMULTI_on(PL_errgv);
3626 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3627 GvMULTI_on(PL_replgv);
3628 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3629 #ifdef PERL_DONT_CREATE_GVSV
3632 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3634 SET_CURSTASH(PL_defstash);
3635 CopSTASH_set(&PL_compiling, PL_defstash);
3636 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3637 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3639 /* We must init $/ before switches are processed. */
3640 sv_setpvs(get_sv("/", GV_ADD), "\n");
3644 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3647 PerlIO *rsfp = NULL;
3651 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3654 PL_origfilename = savepvs("-e");
3657 /* if find_script() returns, it returns a malloc()-ed value */
3658 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3660 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3661 const char *s = scriptname + 8;
3667 * Tell apart "normal" usage of fdscript, e.g.
3668 * with bash on FreeBSD:
3669 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3670 * from usage in suidperl.
3671 * Does any "normal" usage leave garbage after the number???
3672 * Is it a mistake to use a similar /dev/fd/ construct for
3677 * Be supersafe and do some sanity-checks.
3678 * Still, can we be sure we got the right thing?
3681 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3684 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3686 scriptname = savepv(s + 1);
3687 Safefree(PL_origfilename);
3688 PL_origfilename = (char *)scriptname;
3693 CopFILE_free(PL_curcop);
3694 CopFILE_set(PL_curcop, PL_origfilename);
3695 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3696 scriptname = (char *)"";
3697 if (fdscript >= 0) {
3698 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3700 else if (!*scriptname) {
3701 forbid_setid(0, *suidscript);
3705 #ifdef FAKE_BIT_BUCKET
3706 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3707 * is called) and still have the "-e" work. (Believe it or not,
3708 * a /dev/null is required for the "-e" to work because source
3709 * filter magic is used to implement it. ) This is *not* a general
3710 * replacement for a /dev/null. What we do here is create a temp
3711 * file (an empty file), open up that as the script, and then
3712 * immediately close and unlink it. Close enough for jazz. */
3713 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3714 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3715 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3716 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3717 FAKE_BIT_BUCKET_TEMPLATE
3719 const char * const err = "Failed to create a fake bit bucket";
3720 if (strEQ(scriptname, BIT_BUCKET)) {
3721 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3722 int tmpfd = mkstemp(tmpname);
3724 scriptname = tmpname;
3727 Perl_croak(aTHX_ err);
3730 scriptname = mktemp(tmpname);
3732 Perl_croak(aTHX_ err);
3737 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3738 #ifdef FAKE_BIT_BUCKET
3739 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3740 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3741 && strlen(scriptname) == sizeof(tmpname) - 1) {
3744 scriptname = BIT_BUCKET;
3748 /* PSz 16 Sep 03 Keep neat error message */
3750 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3752 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3753 CopFILE(PL_curcop), Strerror(errno));
3755 #if defined(HAS_FCNTL) && defined(F_SETFD)
3756 /* ensure close-on-exec */
3757 fcntl(PerlIO_fileno(rsfp), F_SETFD, 1);
3760 if (PerlLIO_fstat(PerlIO_fileno(rsfp), &tmpstatbuf) >= 0
3761 && S_ISDIR(tmpstatbuf.st_mode))
3762 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3770 * I_SYSSTATVFS HAS_FSTATVFS
3772 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3773 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3774 * here so that metaconfig picks them up. */
3777 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3778 /* Don't even need this function. */
3781 S_validate_suid(pTHX_ PerlIO *rsfp)
3783 const UV my_uid = PerlProc_getuid();
3784 const UV my_euid = PerlProc_geteuid();
3785 const UV my_gid = PerlProc_getgid();
3786 const UV my_egid = PerlProc_getegid();
3788 PERL_ARGS_ASSERT_VALIDATE_SUID;
3790 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
3793 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3794 if ((my_euid != my_uid && my_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3796 (my_egid != my_gid && my_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3799 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3800 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3801 /* not set-id, must be wrapped */
3804 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3807 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3813 PERL_ARGS_ASSERT_FIND_BEGINNING;
3815 /* skip forward in input to the real script? */
3818 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3819 Perl_croak(aTHX_ "No Perl script found in input\n");
3821 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3822 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3823 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3825 while (*s == ' ' || *s == '\t') s++;
3827 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3828 || s2[-1] == '_') s2--;
3829 if (strnEQ(s2-4,"perl",4))
3830 while ((s = moreswitches(s)))
3839 /* no need to do anything here any more if we don't
3841 #if !NO_TAINT_SUPPORT
3843 const UV my_uid = PerlProc_getuid();
3844 const UV my_euid = PerlProc_geteuid();
3845 const UV my_gid = PerlProc_getgid();
3846 const UV my_egid = PerlProc_getegid();
3848 /* Should not happen: */
3849 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
3850 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
3854 * Should go by suidscript, not uid!=euid: why disallow
3855 * system("ls") in scripts run from setuid things?
3856 * Or, is this run before we check arguments and set suidscript?
3857 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3858 * (We never have suidscript, can we be sure to have fdscript?)
3859 * Or must then go by UID checks? See comments in forbid_setid also.
3863 /* This is used very early in the lifetime of the program,
3864 * before even the options are parsed, so PL_tainting has
3865 * not been initialized properly. */
3867 Perl_doing_taint(int argc, char *argv[], char *envp[])
3869 #ifndef PERL_IMPLICIT_SYS
3870 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3871 * before we have an interpreter-- and the whole point of this
3872 * function is to be called at such an early stage. If you are on
3873 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3874 * "tainted because running with altered effective ids', you'll
3875 * have to add your own checks somewhere in here. The two most
3876 * known samples of 'implicitness' are Win32 and NetWare, neither
3877 * of which has much of concept of 'uids'. */
3878 int uid = PerlProc_getuid();
3879 int euid = PerlProc_geteuid();
3880 int gid = PerlProc_getgid();
3881 int egid = PerlProc_getegid();
3888 if (uid && (euid != uid || egid != gid))
3890 #endif /* !PERL_IMPLICIT_SYS */
3891 /* This is a really primitive check; environment gets ignored only
3892 * if -T are the first chars together; otherwise one gets
3893 * "Too late" message. */
3894 if ( argc > 1 && argv[1][0] == '-'
3895 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3900 /* Passing the flag as a single char rather than a string is a slight space
3901 optimisation. The only message that isn't /^-.$/ is
3902 "program input from stdin", which is substituted in place of '\0', which
3903 could never be a command line flag. */
3905 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3908 char string[3] = "-x";
3909 const char *message = "program input from stdin";
3916 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3917 if (PerlProc_getuid() != PerlProc_geteuid())
3918 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3919 if (PerlProc_getgid() != PerlProc_getegid())
3920 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3921 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3923 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3927 Perl_init_dbargs(pTHX)
3929 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3934 /* Someone has already created it.
3935 It might have entries, and if we just turn off AvREAL(), they will
3936 "leak" until global destruction. */
3938 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
3939 Perl_croak(aTHX_ "Cannot set tied @DB::args");
3941 AvREIFY_only(PL_dbargs);
3945 Perl_init_debugger(pTHX)
3948 HV * const ostash = PL_curstash;
3950 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
3952 Perl_init_dbargs(aTHX);
3953 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3954 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3955 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3956 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3957 if (!SvIOK(PL_DBsingle))
3958 sv_setiv(PL_DBsingle, 0);
3959 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3960 if (!SvIOK(PL_DBtrace))
3961 sv_setiv(PL_DBtrace, 0);
3962 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3963 if (!SvIOK(PL_DBsignal))
3964 sv_setiv(PL_DBsignal, 0);
3965 SvREFCNT_dec(PL_curstash);
3966 PL_curstash = ostash;
3969 #ifndef STRESS_REALLOC
3970 #define REASONABLE(size) (size)
3972 #define REASONABLE(size) (1) /* unreasonable */
3976 Perl_init_stacks(pTHX)
3979 /* start with 128-item stack and 8K cxstack */
3980 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3981 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3982 PL_curstackinfo->si_type = PERLSI_MAIN;
3983 PL_curstack = PL_curstackinfo->si_stack;
3984 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3986 PL_stack_base = AvARRAY(PL_curstack);
3987 PL_stack_sp = PL_stack_base;
3988 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3990 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3993 PL_tmps_max = REASONABLE(128);
3995 Newx(PL_markstack,REASONABLE(32),I32);
3996 PL_markstack_ptr = PL_markstack;
3997 PL_markstack_max = PL_markstack + REASONABLE(32);
4001 Newx(PL_scopestack,REASONABLE(32),I32);
4003 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4005 PL_scopestack_ix = 0;
4006 PL_scopestack_max = REASONABLE(32);
4008 Newx(PL_savestack,REASONABLE(128),ANY);
4009 PL_savestack_ix = 0;
4010 PL_savestack_max = REASONABLE(128);
4019 while (PL_curstackinfo->si_next)
4020 PL_curstackinfo = PL_curstackinfo->si_next;
4021 while (PL_curstackinfo) {
4022 PERL_SI *p = PL_curstackinfo->si_prev;
4023 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4024 Safefree(PL_curstackinfo->si_cxstack);
4025 Safefree(PL_curstackinfo);
4026 PL_curstackinfo = p;
4028 Safefree(PL_tmps_stack);
4029 Safefree(PL_markstack);
4030 Safefree(PL_scopestack);
4032 Safefree(PL_scopestack_name);
4034 Safefree(PL_savestack);
4038 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4040 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4041 AV *const isa = GvAVn(gv);
4044 PERL_ARGS_ASSERT_POPULATE_ISA;
4046 if(AvFILLp(isa) != -1)
4049 /* NOTE: No support for tied ISA */
4051 va_start(args, len);
4053 const char *const parent = va_arg(args, const char*);
4058 parent_len = va_arg(args, size_t);
4060 /* Arguments are supplied with a trailing :: */
4061 assert(parent_len > 2);
4062 assert(parent[parent_len - 1] == ':');
4063 assert(parent[parent_len - 2] == ':');
4064 av_push(isa, newSVpvn(parent, parent_len - 2));
4065 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4072 S_init_predump_symbols(pTHX)
4078 sv_setpvs(get_sv("\"", GV_ADD), " ");
4079 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4082 /* Historically, PVIOs were blessed into IO::Handle, unless
4083 FileHandle was loaded, in which case they were blessed into
4084 that. Action at a distance.
4085 However, if we simply bless into IO::Handle, we break code
4086 that assumes that PVIOs will have (among others) a seek
4087 method. IO::File inherits from IO::Handle and IO::Seekable,
4088 and provides the needed methods. But if we simply bless into
4089 it, then we break code that assumed that by loading
4090 IO::Handle, *it* would work.
4091 So a compromise is to set up the correct @IO::File::ISA,
4092 so that code that does C<use IO::Handle>; will still work.
4095 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4096 STR_WITH_LEN("IO::Handle::"),
4097 STR_WITH_LEN("IO::Seekable::"),
4098 STR_WITH_LEN("Exporter::"),
4101 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4102 GvMULTI_on(PL_stdingv);
4103 io = GvIOp(PL_stdingv);
4104 IoTYPE(io) = IoTYPE_RDONLY;
4105 IoIFP(io) = PerlIO_stdin();
4106 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4108 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4110 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4113 IoTYPE(io) = IoTYPE_WRONLY;
4114 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4116 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4118 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4120 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4121 GvMULTI_on(PL_stderrgv);
4122 io = GvIOp(PL_stderrgv);
4123 IoTYPE(io) = IoTYPE_WRONLY;
4124 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4125 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4127 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4129 PL_statname = newSVpvs(""); /* last filename we did stat on */
4133 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4137 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4139 argc--,argv++; /* skip name of script */
4140 if (PL_doswitches) {
4141 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4145 if (argv[0][1] == '-' && !argv[0][2]) {
4149 if ((s = strchr(argv[0], '='))) {
4150 const char *const start_name = argv[0] + 1;
4151 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4152 TRUE, SVt_PV)), s + 1);
4155 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4158 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4159 GvMULTI_on(PL_argvgv);
4160 (void)gv_AVadd(PL_argvgv);
4161 av_clear(GvAVn(PL_argvgv));
4162 for (; argc > 0; argc--,argv++) {
4163 SV * const sv = newSVpv(argv[0],0);
4164 av_push(GvAVn(PL_argvgv),sv);
4165 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4166 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4169 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4170 (void)sv_utf8_decode(sv);
4174 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4175 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4176 "-i used with no filenames on the command line, "
4177 "reading from STDIN");
4181 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4186 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4188 PL_toptarget = newSV_type(SVt_PVIV);
4189 sv_setpvs(PL_toptarget, "");
4190 PL_bodytarget = newSV_type(SVt_PVIV);
4191 sv_setpvs(PL_bodytarget, "");
4192 PL_formtarget = PL_bodytarget;
4196 init_argv_symbols(argc,argv);
4198 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4199 sv_setpv(GvSV(tmpgv),PL_origfilename);
4201 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4203 bool env_is_not_environ;
4204 GvMULTI_on(PL_envgv);
4205 hv = GvHVn(PL_envgv);
4206 hv_magic(hv, NULL, PERL_MAGIC_env);
4208 #ifdef USE_ENVIRON_ARRAY
4209 /* Note that if the supplied env parameter is actually a copy
4210 of the global environ then it may now point to free'd memory
4211 if the environment has been modified since. To avoid this
4212 problem we treat env==NULL as meaning 'use the default'
4216 env_is_not_environ = env != environ;
4217 if (env_is_not_environ
4218 # ifdef USE_ITHREADS
4219 && PL_curinterp == aTHX
4228 for (; *env; env++) {
4231 if (!(s = strchr(old_var,'=')) || s == old_var)
4234 #if defined(MSDOS) && !defined(DJGPP)
4236 (void)strupr(old_var);
4239 sv = newSVpv(s+1, 0);
4240 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4241 if (env_is_not_environ)
4245 #endif /* USE_ENVIRON_ARRAY */
4246 #endif /* !PERL_MICRO */
4250 /* touch @F array to prevent spurious warnings 20020415 MJD */
4252 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4257 S_init_perllib(pTHX)
4261 const char *perl5lib = NULL;
4264 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4268 if (!TAINTING_get) {
4270 perl5lib = PerlEnv_getenv("PERL5LIB");
4272 * It isn't possible to delete an environment variable with
4273 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4274 * case we treat PERL5LIB as undefined if it has a zero-length value.
4276 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4277 if (perl5lib && *perl5lib != '\0')
4281 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4283 s = PerlEnv_getenv("PERLLIB");
4285 incpush_use_sep(s, 0, 0);
4288 /* Treat PERL5?LIB as a possible search list logical name -- the
4289 * "natural" VMS idiom for a Unix path string. We allow each
4290 * element to be a set of |-separated directories for compatibility.
4294 if (my_trnlnm("PERL5LIB",buf,0))
4296 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4297 } while (my_trnlnm("PERL5LIB",buf,++idx));
4299 while (my_trnlnm("PERLLIB",buf,idx++))
4300 incpush_use_sep(buf, 0, 0);
4305 #ifndef PERL_IS_MINIPERL
4306 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4307 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4309 /* Use the ~-expanded versions of APPLLIB (undocumented),
4310 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4313 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4314 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4318 /* sitearch is always relative to sitelib on Windows for
4319 * DLL-based path intuition to work correctly */
4320 # if !defined(WIN32)
4321 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4322 INCPUSH_CAN_RELOCATE);
4328 /* this picks up sitearch as well */
4329 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4331 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4333 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4337 #ifdef PERL_VENDORARCH_EXP
4338 /* vendorarch is always relative to vendorlib on Windows for
4339 * DLL-based path intuition to work correctly */
4340 # if !defined(WIN32)
4341 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4342 INCPUSH_CAN_RELOCATE);
4346 #ifdef PERL_VENDORLIB_EXP
4348 /* this picks up vendorarch as well */
4349 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4351 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4353 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4354 INCPUSH_CAN_RELOCATE);
4359 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4363 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4367 s = win32_get_privlib(PERL_FS_VERSION, &len);
4369 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4372 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4374 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4378 #ifdef PERL_OTHERLIBDIRS
4379 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4380 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4381 |INCPUSH_CAN_RELOCATE);
4384 if (!TAINTING_get) {
4387 * It isn't possible to delete an environment variable with
4388 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4389 * case we treat PERL5LIB as undefined if it has a zero-length value.
4391 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4392 if (perl5lib && *perl5lib != '\0')
4396 incpush_use_sep(perl5lib, 0,
4397 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4399 /* Treat PERL5?LIB as a possible search list logical name -- the
4400 * "natural" VMS idiom for a Unix path string. We allow each
4401 * element to be a set of |-separated directories for compatibility.
4405 if (my_trnlnm("PERL5LIB",buf,0))
4407 incpush_use_sep(buf, 0,
4408 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4409 } while (my_trnlnm("PERL5LIB",buf,++idx));
4413 /* Use the ~-expanded versions of APPLLIB (undocumented),
4414 SITELIB and VENDORLIB for older versions
4417 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4418 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4421 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4422 /* Search for version-specific dirs below here */
4423 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4424 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4428 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4429 /* Search for version-specific dirs below here */
4430 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4431 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4434 #ifdef PERL_OTHERLIBDIRS
4435 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4436 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4437 |INCPUSH_CAN_RELOCATE);
4439 #endif /* !PERL_IS_MINIPERL */
4442 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4445 #if defined(DOSISH) || defined(__SYMBIAN32__)
4446 # define PERLLIB_SEP ';'
4449 # define PERLLIB_SEP '|'
4451 # define PERLLIB_SEP ':'
4454 #ifndef PERLLIB_MANGLE
4455 # define PERLLIB_MANGLE(s,n) (s)
4458 #ifndef PERL_IS_MINIPERL
4459 /* Push a directory onto @INC if it exists.
4460 Generate a new SV if we do this, to save needing to copy the SV we push
4463 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4468 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4470 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4471 S_ISDIR(tmpstatbuf.st_mode)) {
4473 dir = newSVsv(stem);
4475 /* Truncate dir back to stem. */
4476 SvCUR_set(dir, SvCUR(stem));
4483 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4485 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4488 PERL_ARGS_ASSERT_MAYBERELOCATE;
4491 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4492 defined to so something (in os2/os2.c), but the code has been
4493 this way, ignoring any possible changed of length, since
4494 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4496 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4502 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4504 while (unix[len-1] == '/') len--; /* Cosmetic */
4505 sv_usepvn(libdir,unix,len);
4508 PerlIO_printf(Perl_error_log,
4509 "Failed to unixify @INC element \"%s\"\n",
4510 SvPV_nolen_const(libdir));
4514 /* Do the if() outside the #ifdef to avoid warnings about an unused
4517 #ifdef PERL_RELOCATABLE_INC
4519 * Relocatable include entries are marked with a leading .../
4522 * 0: Remove that leading ".../"
4523 * 1: Remove trailing executable name (anything after the last '/')
4524 * from the perl path to give a perl prefix
4526 * While the @INC element starts "../" and the prefix ends with a real
4527 * directory (ie not . or ..) chop that real directory off the prefix
4528 * and the leading "../" from the @INC element. ie a logical "../"
4530 * Finally concatenate the prefix and the remainder of the @INC element
4531 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4532 * generates /usr/local/lib/perl5
4534 const char *libpath = SvPVX(libdir);
4535 STRLEN libpath_len = SvCUR(libdir);
4536 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4538 SV * const caret_X = get_sv("\030", 0);
4539 /* Going to use the SV just as a scratch buffer holding a C
4545 /* $^X is *the* source of taint if tainting is on, hence
4546 SvPOK() won't be true. */
4548 assert(SvPOKp(caret_X));
4549 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4551 /* Firstly take off the leading .../
4552 If all else fail we'll do the paths relative to the current
4554 sv_chop(libdir, libpath + 4);
4555 /* Don't use SvPV as we're intentionally bypassing taining,
4556 mortal copies that the mg_get of tainting creates, and
4557 corruption that seems to come via the save stack.
4558 I guess that the save stack isn't correctly set up yet. */
4559 libpath = SvPVX(libdir);
4560 libpath_len = SvCUR(libdir);
4562 /* This would work more efficiently with memrchr, but as it's
4563 only a GNU extension we'd need to probe for it and
4564 implement our own. Not hard, but maybe not worth it? */
4566 prefix = SvPVX(prefix_sv);
4567 lastslash = strrchr(prefix, '/');
4569 /* First time in with the *lastslash = '\0' we just wipe off
4570 the trailing /perl from (say) /usr/foo/bin/perl
4574 while ((*lastslash = '\0'), /* Do that, come what may. */
4575 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4576 && (lastslash = strrchr(prefix, '/')))) {
4577 if (lastslash[1] == '\0'
4578 || (lastslash[1] == '.'
4579 && (lastslash[2] == '/' /* ends "/." */
4580 || (lastslash[2] == '/'
4581 && lastslash[3] == '/' /* or "/.." */
4583 /* Prefix ends "/" or "/." or "/..", any of which
4584 are fishy, so don't do any more logical cleanup.
4588 /* Remove leading "../" from path */
4591 /* Next iteration round the loop removes the last
4592 directory name from prefix by writing a '\0' in
4593 the while clause. */
4595 /* prefix has been terminated with a '\0' to the correct
4596 length. libpath points somewhere into the libdir SV.
4597 We need to join the 2 with '/' and drop the result into
4599 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4600 SvREFCNT_dec(libdir);
4601 /* And this is the new libdir. */
4604 (PerlProc_getuid() != PerlProc_geteuid() ||
4605 PerlProc_getgid() != PerlProc_getegid())) {
4606 /* Need to taint relocated paths if running set ID */
4607 SvTAINTED_on(libdir);
4610 SvREFCNT_dec(prefix_sv);
4618 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4621 #ifndef PERL_IS_MINIPERL
4622 const U8 using_sub_dirs
4623 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4624 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4625 const U8 add_versioned_sub_dirs
4626 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4627 const U8 add_archonly_sub_dirs
4628 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4629 #ifdef PERL_INC_VERSION_LIST
4630 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4633 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4634 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4635 AV *const inc = GvAVn(PL_incgv);
4637 PERL_ARGS_ASSERT_INCPUSH;
4640 /* Could remove this vestigial extra block, if we don't mind a lot of
4641 re-indenting diff noise. */
4643 SV *const libdir = mayberelocate(dir, len, flags);
4644 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4645 arranged to unshift #! line -I onto the front of @INC. However,
4646 -I can add version and architecture specific libraries, and they
4647 need to go first. The old code assumed that it was always
4648 pushing. Hence to make it work, need to push the architecture
4649 (etc) libraries onto a temporary array, then "unshift" that onto
4650 the front of @INC. */
4651 #ifndef PERL_IS_MINIPERL
4652 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4655 * BEFORE pushing libdir onto @INC we may first push version- and
4656 * archname-specific sub-directories.
4658 if (using_sub_dirs) {
4659 SV *subdir = newSVsv(libdir);
4660 #ifdef PERL_INC_VERSION_LIST
4661 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4662 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4663 const char * const *incver;
4666 if (add_versioned_sub_dirs) {
4667 /* .../version/archname if -d .../version/archname */
4668 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4669 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4671 /* .../version if -d .../version */
4672 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4673 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4676 #ifdef PERL_INC_VERSION_LIST
4678 for (incver = incverlist; *incver; incver++) {
4679 /* .../xxx if -d .../xxx */
4680 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4681 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4686 if (add_archonly_sub_dirs) {
4687 /* .../archname if -d .../archname */
4688 sv_catpvs(subdir, "/" ARCHNAME);
4689 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4693 assert (SvREFCNT(subdir) == 1);
4694 SvREFCNT_dec(subdir);
4696 #endif /* !PERL_IS_MINIPERL */
4697 /* finally add this lib directory at the end of @INC */
4699 #ifdef PERL_IS_MINIPERL
4700 const U32 extra = 0;
4702 U32 extra = av_len(av) + 1;
4704 av_unshift(inc, extra + push_basedir);
4706 av_store(inc, extra, libdir);
4707 #ifndef PERL_IS_MINIPERL
4709 /* av owns a reference, av_store() expects to be donated a
4710 reference, and av expects to be sane when it's cleared.
4711 If I wanted to be naughty and wrong, I could peek inside the
4712 implementation of av_clear(), realise that it uses
4713 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4714 and so directly steal from it (with a memcpy() to inc, and
4715 then memset() to NULL them out. But people copy code from the
4716 core expecting it to be best practise, so let's use the API.
4717 Although studious readers will note that I'm not checking any
4719 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4724 else if (push_basedir) {
4725 av_push(inc, libdir);
4728 if (!push_basedir) {
4729 assert (SvREFCNT(libdir) == 1);
4730 SvREFCNT_dec(libdir);
4736 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4740 /* This logic has been broken out from S_incpush(). It may be possible to
4743 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4745 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4746 * argument to incpush_use_sep. This allows creation of relocatable
4747 * Perl distributions that patch the binary at install time. Those
4748 * distributions will have to provide their own relocation tools; this
4749 * is not a feature otherwise supported by core Perl.
4751 #ifndef PERL_RELOCATABLE_INCPUSH
4758 /* Break at all separators */
4759 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4761 /* skip any consecutive separators */
4763 /* Uncomment the next line for PATH semantics */
4764 /* But you'll need to write tests */
4765 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4767 incpush(p, (STRLEN)(s - p), flags);
4772 incpush(p, (STRLEN)(end - p), flags);
4777 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4781 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4787 PERL_ARGS_ASSERT_CALL_LIST;
4789 while (av_len(paramList) >= 0) {
4790 cv = MUTABLE_CV(av_shift(paramList));
4792 if (paramList == PL_beginav) {
4793 /* save PL_beginav for compiler */
4794 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4796 else if (paramList == PL_checkav) {
4797 /* save PL_checkav for compiler */
4798 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4800 else if (paramList == PL_unitcheckav) {
4801 /* save PL_unitcheckav for compiler */
4802 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4813 PL_madskills |= 16384;
4818 PL_madskills &= ~16384;
4821 (void)SvPV_const(atsv, len);
4823 PL_curcop = &PL_compiling;
4824 CopLINE_set(PL_curcop, oldline);
4825 if (paramList == PL_beginav)
4826 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4828 Perl_sv_catpvf(aTHX_ atsv,
4829 "%s failed--call queue aborted",
4830 paramList == PL_checkav ? "CHECK"
4831 : paramList == PL_initav ? "INIT"
4832 : paramList == PL_unitcheckav ? "UNITCHECK"
4834 while (PL_scopestack_ix > oldscope)
4837 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4844 /* my_exit() was called */
4845 while (PL_scopestack_ix > oldscope)
4848 SET_CURSTASH(PL_defstash);
4849 PL_curcop = &PL_compiling;
4850 CopLINE_set(PL_curcop, oldline);
4853 assert(0); /* NOTREACHED */
4856 PL_curcop = &PL_compiling;
4857 CopLINE_set(PL_curcop, oldline);
4860 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
4869 Perl_my_exit(pTHX_ U32 status)
4880 STATUS_EXIT_SET(status);
4887 Perl_my_failure_exit(pTHX)
4891 /* We have been called to fall on our sword. The desired exit code
4892 * should be already set in STATUS_UNIX, but could be shifted over
4893 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4896 * If an error code has not been set, then force the issue.
4898 if (MY_POSIX_EXIT) {
4900 /* According to the die_exit.t tests, if errno is non-zero */
4901 /* It should be used for the error status. */
4903 if (errno == EVMSERR) {
4904 STATUS_NATIVE = vaxc$errno;
4907 /* According to die_exit.t tests, if the child_exit code is */
4908 /* also zero, then we need to exit with a code of 255 */
4909 if ((errno != 0) && (errno < 256))
4910 STATUS_UNIX_EXIT_SET(errno);
4911 else if (STATUS_UNIX < 255) {
4912 STATUS_UNIX_EXIT_SET(255);
4917 /* The exit code could have been set by $? or vmsish which
4918 * means that it may not have fatal set. So convert
4919 * success/warning codes to fatal with out changing
4920 * the POSIX status code. The severity makes VMS native
4921 * status handling work, while UNIX mode programs use the
4922 * the POSIX exit codes.
4924 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4925 STATUS_NATIVE &= STS$M_COND_ID;
4926 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4930 /* Traditionally Perl on VMS always expects a Fatal Error. */
4931 if (vaxc$errno & 1) {
4933 /* So force success status to failure */
4934 if (STATUS_NATIVE & 1)
4939 STATUS_UNIX = EINTR; /* In case something cares */
4944 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4946 /* Encode the severity code */
4947 severity = STATUS_NATIVE & STS$M_SEVERITY;
4948 STATUS_UNIX = (severity ? severity : 1) << 8;
4950 /* Perl expects this to be a fatal error */
4951 if (severity != STS$K_SEVERE)
4960 STATUS_UNIX_SET(errno);
4962 exitstatus = STATUS_UNIX >> 8;
4963 if (exitstatus & 255)
4964 STATUS_UNIX_SET(exitstatus);
4966 STATUS_UNIX_SET(255);
4973 S_my_exit_jump(pTHX)
4978 SvREFCNT_dec(PL_e_script);
4982 POPSTACK_TO(PL_mainstack);
4990 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4993 const char * const p = SvPVX_const(PL_e_script);
4994 const char *nl = strchr(p, '\n');
4996 PERL_UNUSED_ARG(idx);
4997 PERL_UNUSED_ARG(maxlen);
4999 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5001 filter_del(read_e_script);
5004 sv_catpvn(buf_sv, p, nl-p);
5005 sv_chop(PL_e_script, nl);
5011 * c-indentation-style: bsd
5013 * indent-tabs-mode: nil
5016 * ex: set ts=8 sts=4 sw=4 et: