3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
4 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * A ship then new they built for him
13 * of mithril and of elven-glass
14 * --from Bilbo's song of EƤrendil
16 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
19 /* This file contains the top-level functions that are used to create, use
20 * and destroy a perl interpreter, plus the functions used by XS code to
21 * call back into perl. Note that it does not contain the actual main()
22 * function of the interpreter; that can be found in perlmain.c
26 #define PERL_IN_PERL_C
28 #include "patchlevel.h" /* for local_patches */
34 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
39 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
41 # include <sys/wait.h>
49 char control[CMSG_SPACE(sizeof(int))];
66 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
67 char *getenv (char *); /* Usually in <stdlib.h> */
70 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
72 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
73 /* Drop everything. Heck, don't even try to call it */
74 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
76 /* Drop almost everything */
77 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
80 #define CALL_BODY_EVAL(myop) \
81 if (PL_op == (myop)) \
82 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
86 #define CALL_BODY_SUB(myop) \
87 if (PL_op == (myop)) \
88 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
92 #define CALL_LIST_BODY(cv) \
93 PUSHMARK(PL_stack_sp); \
94 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
97 S_init_tls_and_interp(PerlInterpreter *my_perl)
101 PERL_SET_INTERP(my_perl);
102 #if defined(USE_ITHREADS)
105 PERL_SET_THX(my_perl);
108 MUTEX_INIT(&PL_dollarzero_mutex);
110 #ifdef PERL_IMPLICIT_CONTEXT
111 MUTEX_INIT(&PL_my_ctx_mutex);
114 #if defined(USE_ITHREADS)
117 /* This always happens for non-ithreads */
120 PERL_SET_THX(my_perl);
125 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
128 Perl_sys_init(int* argc, char*** argv)
132 PERL_ARGS_ASSERT_SYS_INIT;
134 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
135 PERL_UNUSED_ARG(argv);
136 PERL_SYS_INIT_BODY(argc, argv);
140 Perl_sys_init3(int* argc, char*** argv, char*** env)
144 PERL_ARGS_ASSERT_SYS_INIT3;
146 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
147 PERL_UNUSED_ARG(argv);
148 PERL_UNUSED_ARG(env);
149 PERL_SYS_INIT3_BODY(argc, argv, env);
156 if (!PL_veto_cleanup) {
157 PERL_SYS_TERM_BODY();
162 #ifdef PERL_IMPLICIT_SYS
164 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
165 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
166 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
167 struct IPerlDir* ipD, struct IPerlSock* ipS,
168 struct IPerlProc* ipP)
170 PerlInterpreter *my_perl;
172 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
174 /* Newx() needs interpreter, so call malloc() instead */
175 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
176 S_init_tls_and_interp(my_perl);
177 Zero(my_perl, 1, PerlInterpreter);
187 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
194 =head1 Embedding Functions
196 =for apidoc perl_alloc
198 Allocates a new Perl interpreter. See L<perlembed>.
206 PerlInterpreter *my_perl;
208 /* Newx() needs interpreter, so call malloc() instead */
209 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
211 S_init_tls_and_interp(my_perl);
212 #ifndef PERL_TRACK_MEMPOOL
213 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
215 Zero(my_perl, 1, PerlInterpreter);
216 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
220 #endif /* PERL_IMPLICIT_SYS */
223 =for apidoc perl_construct
225 Initializes a new Perl interpreter. See L<perlembed>.
231 perl_construct(pTHXx)
235 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
239 PL_perl_destruct_level = 1;
241 PERL_UNUSED_ARG(my_perl);
242 if (PL_perl_destruct_level > 0)
245 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
247 /* set read-only and try to insure than we wont see REFCNT==0
250 SvREADONLY_on(&PL_sv_undef);
251 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
253 sv_setpv(&PL_sv_no,PL_No);
254 /* value lookup in void context - happens to have the side effect
255 of caching the numeric forms. However, as &PL_sv_no doesn't contain
256 a string that is a valid numer, we have to turn the public flags by
262 SvREADONLY_on(&PL_sv_no);
263 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
265 sv_setpv(&PL_sv_yes,PL_Yes);
268 SvREADONLY_on(&PL_sv_yes);
269 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
271 SvREADONLY_on(&PL_sv_placeholder);
272 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
274 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
275 #ifdef PERL_USES_PL_PIDSTATUS
276 PL_pidstatus = newHV();
279 PL_rs = newSVpvs("\n");
289 SET_NUMERIC_STANDARD();
291 #if defined(LOCAL_PATCH_COUNT)
292 PL_localpatches = local_patches; /* For possible -v */
295 #ifdef HAVE_INTERP_INTERN
299 PerlIO_init(aTHX); /* Hook to IO system */
301 PL_fdpid = newAV(); /* for remembering popen pids by fd */
302 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
303 PL_errors = newSVpvs("");
304 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
305 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
306 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
308 /* First entry is a list of empty elements. It needs to be initialised
309 else all hell breaks loose in S_find_uninit_var(). */
310 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
311 PL_regex_pad = AvARRAY(PL_regex_padav);
313 #ifdef USE_REENTRANT_API
314 Perl_reentrant_init(aTHX);
317 /* Note that strtab is a rather special HV. Assumptions are made
318 about not iterating on it, and not adding tie magic to it.
319 It is properly deallocated in perl_destruct() */
322 HvSHAREKEYS_off(PL_strtab); /* mandatory */
323 hv_ksplit(PL_strtab, 512);
325 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
326 _dyld_lookup_and_bind
327 ("__environ", (unsigned long *) &environ_pointer, NULL);
331 # ifdef USE_ENVIRON_ARRAY
332 PL_origenviron = environ;
336 /* Use sysconf(_SC_CLK_TCK) if available, if not
337 * available or if the sysconf() fails, use the HZ.
338 * BeOS has those, but returns the wrong value.
339 * The HZ if not originally defined has been by now
340 * been defined as CLK_TCK, if available. */
341 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
342 PL_clocktick = sysconf(_SC_CLK_TCK);
343 if (PL_clocktick <= 0)
347 PL_stashcache = newHV();
349 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
352 if (!PL_mmap_page_size) {
353 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
355 SETERRNO(0, SS_NORMAL);
357 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
359 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
361 if ((long) PL_mmap_page_size < 0) {
363 SV * const error = ERRSV;
364 SvUPGRADE(error, SVt_PV);
365 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
368 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
372 # ifdef HAS_GETPAGESIZE
373 PL_mmap_page_size = getpagesize();
375 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
376 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
380 if (PL_mmap_page_size <= 0)
381 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
382 (IV) PL_mmap_page_size);
384 #endif /* HAS_MMAP */
386 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
387 PL_timesbase.tms_utime = 0;
388 PL_timesbase.tms_stime = 0;
389 PL_timesbase.tms_cutime = 0;
390 PL_timesbase.tms_cstime = 0;
393 PL_registered_mros = newHV();
394 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
395 HvMAX(PL_registered_mros) = 0;
401 =for apidoc nothreadhook
403 Stub that provides thread hook for perl_destruct when there are
410 Perl_nothreadhook(pTHX)
416 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
418 Perl_dump_sv_child(pTHX_ SV *sv)
421 const int sock = PL_dumper_fd;
422 const int debug_fd = PerlIO_fileno(Perl_debug_log);
423 union control_un control;
426 struct cmsghdr *cmptr;
428 unsigned char buffer[256];
430 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
432 if(sock == -1 || debug_fd == -1)
435 PerlIO_flush(Perl_debug_log);
437 /* All these shenanigans are to pass a file descriptor over to our child for
438 it to dump out to. We can't let it hold open the file descriptor when it
439 forks, as the file descriptor it will dump to can turn out to be one end
440 of pipe that some other process will wait on for EOF. (So as it would
441 be open, the wait would be forever.) */
443 msg.msg_control = control.control;
444 msg.msg_controllen = sizeof(control.control);
445 /* We're a connected socket so we don't need a destination */
451 cmptr = CMSG_FIRSTHDR(&msg);
452 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
453 cmptr->cmsg_level = SOL_SOCKET;
454 cmptr->cmsg_type = SCM_RIGHTS;
455 *((int *)CMSG_DATA(cmptr)) = 1;
457 vec[0].iov_base = (void*)&sv;
458 vec[0].iov_len = sizeof(sv);
459 got = sendmsg(sock, &msg, 0);
462 perror("Debug leaking scalars parent sendmsg failed");
465 if(got < sizeof(sv)) {
466 perror("Debug leaking scalars parent short sendmsg");
470 /* Return protocol is
472 unsigned char: length of location string (0 for empty)
473 unsigned char*: string (not terminated)
475 vec[0].iov_base = (void*)&returned_errno;
476 vec[0].iov_len = sizeof(returned_errno);
477 vec[1].iov_base = buffer;
480 got = readv(sock, vec, 2);
483 perror("Debug leaking scalars parent read failed");
484 PerlIO_flush(PerlIO_stderr());
487 if(got < sizeof(returned_errno) + 1) {
488 perror("Debug leaking scalars parent short read");
489 PerlIO_flush(PerlIO_stderr());
494 got = read(sock, buffer + 1, *buffer);
496 perror("Debug leaking scalars parent read 2 failed");
497 PerlIO_flush(PerlIO_stderr());
502 perror("Debug leaking scalars parent short read 2");
503 PerlIO_flush(PerlIO_stderr());
508 if (returned_errno || *buffer) {
509 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
510 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
511 returned_errno, strerror(returned_errno));
517 =for apidoc perl_destruct
519 Shuts down a Perl interpreter. See L<perlembed>.
528 VOL signed char destruct_level; /* see possible values in intrpvar.h */
530 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
534 PERL_ARGS_ASSERT_PERL_DESTRUCT;
536 PERL_UNUSED_ARG(my_perl);
539 /* wait for all pseudo-forked children to finish */
540 PERL_WAIT_FOR_CHILDREN;
542 destruct_level = PL_perl_destruct_level;
545 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
547 const int i = atoi(s);
548 if (destruct_level < i)
554 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
560 if (PL_endav && !PL_minus_c)
561 call_list(PL_scopestack_ix, PL_endav);
567 /* Need to flush since END blocks can produce output */
570 if (CALL_FPTR(PL_threadhook)(aTHX)) {
571 /* Threads hook has vetoed further cleanup */
572 PL_veto_cleanup = TRUE;
576 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
577 if (destruct_level != 0) {
578 /* Fork here to create a child. Our child's job is to preserve the
579 state of scalars prior to destruction, so that we can instruct it
580 to dump any scalars that we later find have leaked.
581 There's no subtlety in this code - it assumes POSIX, and it doesn't
585 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
586 perror("Debug leaking scalars socketpair failed");
592 perror("Debug leaking scalars fork failed");
596 /* We are the child */
597 const int sock = fd[1];
598 const int debug_fd = PerlIO_fileno(Perl_debug_log);
601 /* Our success message is an integer 0, and a char 0 */
602 static const char success[sizeof(int) + 1] = {0};
606 /* We need to close all other file descriptors otherwise we end up
607 with interesting hangs, where the parent closes its end of a
608 pipe, and sits waiting for (another) child to terminate. Only
609 that child never terminates, because it never gets EOF, because
610 we also have the far end of the pipe open. We even need to
611 close the debugging fd, because sometimes it happens to be one
612 end of a pipe, and a process is waiting on the other end for
613 EOF. Normally it would be closed at some point earlier in
614 destruction, but if we happen to cause the pipe to remain open,
615 EOF never occurs, and we get an infinite hang. Hence all the
616 games to pass in a file descriptor if it's actually needed. */
618 f = sysconf(_SC_OPEN_MAX);
620 where = "sysconf failed";
631 union control_un control;
634 struct cmsghdr *cmptr;
638 msg.msg_control = control.control;
639 msg.msg_controllen = sizeof(control.control);
640 /* We're a connected socket so we don't need a source */
644 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
646 vec[0].iov_base = (void*)⌖
647 vec[0].iov_len = sizeof(target);
649 got = recvmsg(sock, &msg, 0);
654 where = "recv failed";
657 if(got < sizeof(target)) {
658 where = "short recv";
662 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
666 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
667 where = "wrong cmsg_len";
670 if(cmptr->cmsg_level != SOL_SOCKET) {
671 where = "wrong cmsg_level";
674 if(cmptr->cmsg_type != SCM_RIGHTS) {
675 where = "wrong cmsg_type";
679 got_fd = *(int*)CMSG_DATA(cmptr);
680 /* For our last little bit of trickery, put the file descriptor
681 back into Perl_debug_log, as if we never actually closed it
683 if(got_fd != debug_fd) {
684 if (dup2(got_fd, debug_fd) == -1) {
691 PerlIO_flush(Perl_debug_log);
693 got = write(sock, &success, sizeof(success));
696 where = "write failed";
699 if(got < sizeof(success)) {
700 where = "short write";
707 int send_errno = errno;
708 unsigned char length = (unsigned char) strlen(where);
709 struct iovec failure[3] = {
710 {(void*)&send_errno, sizeof(send_errno)},
712 {(void*)where, length}
714 int got = writev(sock, failure, 3);
715 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
716 in the parent if we try to read from the socketpair after the
717 child has exited, even if there was data to read.
718 So sleep a bit to give the parent a fighting chance of
721 _exit((got == -1) ? errno : 0);
725 PL_dumper_fd = fd[0];
730 /* We must account for everything. */
732 /* Destroy the main CV and syntax tree */
733 /* Do this now, because destroying ops can cause new SVs to be generated
734 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
735 PL_curcop to point to a valid op from which the filename structure
737 PL_curcop = &PL_compiling;
739 /* ensure comppad/curpad to refer to main's pad */
740 if (CvPADLIST(PL_main_cv)) {
741 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
743 op_free(PL_main_root);
746 PL_main_start = NULL;
747 SvREFCNT_dec(PL_main_cv);
751 /* Tell PerlIO we are about to tear things apart in case
752 we have layers which are using resources that should
756 PerlIO_destruct(aTHX);
758 if (PL_sv_objcount) {
760 * Try to destruct global references. We do this first so that the
761 * destructors and destructees still exist. Some sv's might remain.
762 * Non-referenced objects are on their own.
766 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
767 PL_defoutgv = NULL; /* may have been freed */
770 /* unhook hooks which will soon be, or use, destroyed data */
771 SvREFCNT_dec(PL_warnhook);
773 SvREFCNT_dec(PL_diehook);
776 /* call exit list functions */
777 while (PL_exitlistlen-- > 0)
778 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
780 Safefree(PL_exitlist);
785 SvREFCNT_dec(PL_registered_mros);
787 /* jettison our possibly duplicated environment */
788 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
789 * so we certainly shouldn't free it here
792 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
793 if (environ != PL_origenviron && !PL_use_safe_putenv
795 /* only main thread can free environ[0] contents */
796 && PL_curinterp == aTHX
802 for (i = 0; environ[i]; i++)
803 safesysfree(environ[i]);
805 /* Must use safesysfree() when working with environ. */
806 safesysfree(environ);
808 environ = PL_origenviron;
811 #endif /* !PERL_MICRO */
813 if (destruct_level == 0) {
815 DEBUG_P(debprofdump());
817 #if defined(PERLIO_LAYERS)
818 /* No more IO - including error messages ! */
819 PerlIO_cleanup(aTHX);
822 CopFILE_free(&PL_compiling);
823 CopSTASH_free(&PL_compiling);
825 /* The exit() function will do everything that needs doing. */
829 /* reset so print() ends up where we expect */
833 /* the syntax tree is shared between clones
834 * so op_free(PL_main_root) only ReREFCNT_dec's
835 * REGEXPs in the parent interpreter
836 * we need to manually ReREFCNT_dec for the clones
838 SvREFCNT_dec(PL_regex_padav);
839 PL_regex_padav = NULL;
843 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
844 PL_stashcache = NULL;
846 /* loosen bonds of global variables */
848 /* XXX can PL_parser still be non-null here? */
849 if(PL_parser && PL_parser->rsfp) {
850 (void)PerlIO_close(PL_parser->rsfp);
851 PL_parser->rsfp = NULL;
855 Safefree(PL_splitstr);
865 PL_doswitches = FALSE;
866 PL_dowarn = G_WARN_OFF;
867 PL_doextract = FALSE;
868 PL_sawampersand = FALSE; /* must save all match strings */
871 Safefree(PL_inplace);
873 SvREFCNT_dec(PL_patchlevel);
876 SvREFCNT_dec(PL_e_script);
882 /* magical thingies */
884 SvREFCNT_dec(PL_ofsgv); /* *, */
887 SvREFCNT_dec(PL_ors_sv); /* $\ */
890 SvREFCNT_dec(PL_rs); /* $/ */
893 Safefree(PL_osname); /* $^O */
896 SvREFCNT_dec(PL_statname);
900 /* defgv, aka *_ should be taken care of elsewhere */
902 /* clean up after study() */
903 SvREFCNT_dec(PL_lastscream);
904 PL_lastscream = NULL;
905 Safefree(PL_screamfirst);
907 Safefree(PL_screamnext);
911 Safefree(PL_efloatbuf);
915 /* startup and shutdown function lists */
916 SvREFCNT_dec(PL_beginav);
917 SvREFCNT_dec(PL_beginav_save);
918 SvREFCNT_dec(PL_endav);
919 SvREFCNT_dec(PL_checkav);
920 SvREFCNT_dec(PL_checkav_save);
921 SvREFCNT_dec(PL_unitcheckav);
922 SvREFCNT_dec(PL_unitcheckav_save);
923 SvREFCNT_dec(PL_initav);
925 PL_beginav_save = NULL;
928 PL_checkav_save = NULL;
929 PL_unitcheckav = NULL;
930 PL_unitcheckav_save = NULL;
933 /* shortcuts just get cleared */
942 PL_last_in_gv = NULL;
954 SvREFCNT_dec(PL_argvout_stack);
955 PL_argvout_stack = NULL;
957 SvREFCNT_dec(PL_modglobal);
959 SvREFCNT_dec(PL_preambleav);
960 PL_preambleav = NULL;
961 SvREFCNT_dec(PL_subname);
963 #ifdef PERL_USES_PL_PIDSTATUS
964 SvREFCNT_dec(PL_pidstatus);
967 SvREFCNT_dec(PL_toptarget);
969 SvREFCNT_dec(PL_bodytarget);
970 PL_bodytarget = NULL;
971 PL_formtarget = NULL;
973 /* free locale stuff */
974 #ifdef USE_LOCALE_COLLATE
975 Safefree(PL_collation_name);
976 PL_collation_name = NULL;
979 #ifdef USE_LOCALE_NUMERIC
980 Safefree(PL_numeric_name);
981 PL_numeric_name = NULL;
982 SvREFCNT_dec(PL_numeric_radix_sv);
983 PL_numeric_radix_sv = NULL;
986 /* clear utf8 character classes */
987 SvREFCNT_dec(PL_utf8_alnum);
988 SvREFCNT_dec(PL_utf8_alnumc);
989 SvREFCNT_dec(PL_utf8_ascii);
990 SvREFCNT_dec(PL_utf8_alpha);
991 SvREFCNT_dec(PL_utf8_space);
992 SvREFCNT_dec(PL_utf8_cntrl);
993 SvREFCNT_dec(PL_utf8_graph);
994 SvREFCNT_dec(PL_utf8_digit);
995 SvREFCNT_dec(PL_utf8_upper);
996 SvREFCNT_dec(PL_utf8_lower);
997 SvREFCNT_dec(PL_utf8_print);
998 SvREFCNT_dec(PL_utf8_punct);
999 SvREFCNT_dec(PL_utf8_xdigit);
1000 SvREFCNT_dec(PL_utf8_mark);
1001 SvREFCNT_dec(PL_utf8_toupper);
1002 SvREFCNT_dec(PL_utf8_totitle);
1003 SvREFCNT_dec(PL_utf8_tolower);
1004 SvREFCNT_dec(PL_utf8_tofold);
1005 SvREFCNT_dec(PL_utf8_idstart);
1006 SvREFCNT_dec(PL_utf8_idcont);
1007 PL_utf8_alnum = NULL;
1008 PL_utf8_alnumc = NULL;
1009 PL_utf8_ascii = NULL;
1010 PL_utf8_alpha = NULL;
1011 PL_utf8_space = NULL;
1012 PL_utf8_cntrl = NULL;
1013 PL_utf8_graph = NULL;
1014 PL_utf8_digit = NULL;
1015 PL_utf8_upper = NULL;
1016 PL_utf8_lower = NULL;
1017 PL_utf8_print = NULL;
1018 PL_utf8_punct = NULL;
1019 PL_utf8_xdigit = NULL;
1020 PL_utf8_mark = NULL;
1021 PL_utf8_toupper = NULL;
1022 PL_utf8_totitle = NULL;
1023 PL_utf8_tolower = NULL;
1024 PL_utf8_tofold = NULL;
1025 PL_utf8_idstart = NULL;
1026 PL_utf8_idcont = NULL;
1028 if (!specialWARN(PL_compiling.cop_warnings))
1029 PerlMemShared_free(PL_compiling.cop_warnings);
1030 PL_compiling.cop_warnings = NULL;
1031 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1032 PL_compiling.cop_hints_hash = NULL;
1033 CopFILE_free(&PL_compiling);
1034 CopSTASH_free(&PL_compiling);
1036 /* Prepare to destruct main symbol table. */
1041 SvREFCNT_dec(PL_curstname);
1042 PL_curstname = NULL;
1044 /* clear queued errors */
1045 SvREFCNT_dec(PL_errors);
1048 SvREFCNT_dec(PL_isarev);
1051 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1052 if (PL_scopestack_ix != 0)
1053 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1054 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1055 (long)PL_scopestack_ix);
1056 if (PL_savestack_ix != 0)
1057 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1058 "Unbalanced saves: %ld more saves than restores\n",
1059 (long)PL_savestack_ix);
1060 if (PL_tmps_floor != -1)
1061 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1062 (long)PL_tmps_floor + 1);
1063 if (cxstack_ix != -1)
1064 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1065 (long)cxstack_ix + 1);
1068 /* Now absolutely destruct everything, somehow or other, loops or no. */
1070 /* the 2 is for PL_fdpid and PL_strtab */
1071 while (sv_clean_all() > 2)
1074 AvREAL_off(PL_fdpid); /* no surviving entries */
1075 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1078 #ifdef HAVE_INTERP_INTERN
1082 /* Destruct the global string table. */
1084 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1085 * so that sv_free() won't fail on them.
1086 * Now that the global string table is using a single hunk of memory
1087 * for both HE and HEK, we either need to explicitly unshare it the
1088 * correct way, or actually free things here.
1091 const I32 max = HvMAX(PL_strtab);
1092 HE * const * const array = HvARRAY(PL_strtab);
1093 HE *hent = array[0];
1096 if (hent && ckWARN_d(WARN_INTERNAL)) {
1097 HE * const next = HeNEXT(hent);
1098 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1099 "Unbalanced string table refcount: (%ld) for \"%s\"",
1100 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1107 hent = array[riter];
1112 HvARRAY(PL_strtab) = 0;
1113 HvTOTALKEYS(PL_strtab) = 0;
1114 HvFILL(PL_strtab) = 0;
1116 SvREFCNT_dec(PL_strtab);
1119 /* free the pointer tables used for cloning */
1120 ptr_table_free(PL_ptr_table);
1121 PL_ptr_table = (PTR_TBL_t*)NULL;
1124 /* free special SVs */
1126 SvREFCNT(&PL_sv_yes) = 0;
1127 sv_clear(&PL_sv_yes);
1128 SvANY(&PL_sv_yes) = NULL;
1129 SvFLAGS(&PL_sv_yes) = 0;
1131 SvREFCNT(&PL_sv_no) = 0;
1132 sv_clear(&PL_sv_no);
1133 SvANY(&PL_sv_no) = NULL;
1134 SvFLAGS(&PL_sv_no) = 0;
1138 for (i=0; i<=2; i++) {
1139 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1140 sv_clear(PERL_DEBUG_PAD(i));
1141 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1142 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1146 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1147 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1149 #ifdef DEBUG_LEAKING_SCALARS
1150 if (PL_sv_count != 0) {
1155 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1156 svend = &sva[SvREFCNT(sva)];
1157 for (sv = sva + 1; sv < svend; ++sv) {
1158 if (SvTYPE(sv) != SVTYPEMASK) {
1159 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1161 " refcnt=%"UVuf pTHX__FORMAT "\n"
1162 "\tallocated at %s:%d %s %s%s\n",
1163 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1165 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1167 sv->sv_debug_inpad ? "for" : "by",
1168 sv->sv_debug_optype ?
1169 PL_op_name[sv->sv_debug_optype]: "(none)",
1170 sv->sv_debug_cloned ? " (cloned)" : ""
1172 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1173 Perl_dump_sv_child(aTHX_ sv);
1179 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1183 /* Wait for up to 4 seconds for child to terminate.
1184 This seems to be the least effort way of timing out on reaping
1186 struct timeval waitfor = {4, 0};
1187 int sock = PL_dumper_fd;
1191 FD_SET(sock, &rset);
1192 select(sock + 1, &rset, NULL, NULL, &waitfor);
1193 waitpid(child, &status, WNOHANG);
1198 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1204 #ifdef PERL_DEBUG_READONLY_OPS
1210 #if defined(PERLIO_LAYERS)
1211 /* No more IO - including error messages ! */
1212 PerlIO_cleanup(aTHX);
1215 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1216 as currently layers use it rather than NULL as a marker
1217 for no arg - and will try and SvREFCNT_dec it.
1219 SvREFCNT(&PL_sv_undef) = 0;
1220 SvREADONLY_off(&PL_sv_undef);
1222 Safefree(PL_origfilename);
1223 PL_origfilename = NULL;
1224 Safefree(PL_reg_start_tmp);
1225 PL_reg_start_tmp = (char**)NULL;
1226 PL_reg_start_tmpl = 0;
1227 Safefree(PL_reg_curpm);
1228 Safefree(PL_reg_poscache);
1229 free_tied_hv_pool();
1230 Safefree(PL_op_mask);
1231 Safefree(PL_psig_ptr);
1232 PL_psig_ptr = (SV**)NULL;
1233 Safefree(PL_psig_name);
1234 PL_psig_name = (SV**)NULL;
1236 Safefree(my_perl->Ibitcount);
1237 my_perl->Ibitcount = NULL;
1239 Safefree(PL_psig_pend);
1240 PL_psig_pend = (int*)NULL;
1243 PL_tainting = FALSE;
1244 PL_taint_warn = FALSE;
1245 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1248 DEBUG_P(debprofdump());
1250 #ifdef USE_REENTRANT_API
1251 Perl_reentrant_free(aTHX);
1256 while (PL_regmatch_slab) {
1257 regmatch_slab *s = PL_regmatch_slab;
1258 PL_regmatch_slab = PL_regmatch_slab->next;
1262 /* As the absolutely last thing, free the non-arena SV for mess() */
1265 /* we know that type == SVt_PVMG */
1267 /* it could have accumulated taint magic */
1270 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1271 moremagic = mg->mg_moremagic;
1272 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1274 Safefree(mg->mg_ptr);
1278 /* we know that type >= SVt_PV */
1279 SvPV_free(PL_mess_sv);
1280 Safefree(SvANY(PL_mess_sv));
1281 Safefree(PL_mess_sv);
1288 =for apidoc perl_free
1290 Releases a Perl interpreter. See L<perlembed>.
1300 PERL_ARGS_ASSERT_PERL_FREE;
1302 if (PL_veto_cleanup)
1305 #ifdef PERL_TRACK_MEMPOOL
1308 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1309 * value as we're probably hunting memory leaks then
1311 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1312 if (!s || atoi(s) == 0) {
1313 const U32 old_debug = PL_debug;
1314 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1315 thread at thread exit. */
1317 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1318 "free this thread's memory\n");
1319 PL_debug &= ~ DEBUG_m_FLAG;
1321 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1322 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1323 PL_debug = old_debug;
1328 #if defined(WIN32) || defined(NETWARE)
1329 # if defined(PERL_IMPLICIT_SYS)
1332 void *host = nw_internal_host;
1334 void *host = w32_internal_host;
1336 PerlMem_free(aTHXx);
1338 nw_delete_internal_host(host);
1340 win32_delete_internal_host(host);
1344 PerlMem_free(aTHXx);
1347 PerlMem_free(aTHXx);
1351 #if defined(USE_ITHREADS)
1352 /* provide destructors to clean up the thread key when libperl is unloaded */
1353 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1355 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1356 #pragma fini "perl_fini"
1357 #elif defined(__sun) && !defined(__GNUC__)
1358 #pragma fini (perl_fini)
1362 #if defined(__GNUC__)
1363 __attribute__((destructor))
1368 if (PL_curinterp && !PL_veto_cleanup)
1373 #endif /* THREADS */
1376 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1379 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1380 PL_exitlist[PL_exitlistlen].fn = fn;
1381 PL_exitlist[PL_exitlistlen].ptr = ptr;
1385 #ifdef HAS_PROCSELFEXE
1386 /* This is a function so that we don't hold on to MAXPATHLEN
1387 bytes of stack longer than necessary
1390 S_procself_val(pTHX_ SV *sv, const char *arg0)
1392 char buf[MAXPATHLEN];
1393 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1395 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1396 includes a spurious NUL which will cause $^X to fail in system
1397 or backticks (this will prevent extensions from being built and
1398 many tests from working). readlink is not meant to add a NUL.
1399 Normal readlink works fine.
1401 if (len > 0 && buf[len-1] == '\0') {
1405 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1406 returning the text "unknown" from the readlink rather than the path
1407 to the executable (or returning an error from the readlink). Any valid
1408 path has a '/' in it somewhere, so use that to validate the result.
1409 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1411 if (len > 0 && memchr(buf, '/', len)) {
1412 sv_setpvn(sv,buf,len);
1418 #endif /* HAS_PROCSELFEXE */
1421 S_set_caret_X(pTHX) {
1423 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1425 #ifdef HAS_PROCSELFEXE
1426 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1429 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1431 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1438 =for apidoc perl_parse
1440 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1446 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1453 PERL_ARGS_ASSERT_PERL_PARSE;
1454 #ifndef MULTIPLICITY
1455 PERL_UNUSED_ARG(my_perl);
1458 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1459 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1460 * This MUST be done before any hash stores or fetches take place.
1461 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1462 * yourself, it is your responsibility to provide a good random seed!
1463 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1464 if (!PL_rehash_seed_set)
1465 PL_rehash_seed = get_hash_seed();
1467 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1469 if (s && (atoi(s) == 1))
1470 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1472 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1477 if (PL_origalen != 0) {
1478 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1481 /* Set PL_origalen be the sum of the contiguous argv[]
1482 * elements plus the size of the env in case that it is
1483 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1484 * as the maximum modifiable length of $0. In the worst case
1485 * the area we are able to modify is limited to the size of
1486 * the original argv[0]. (See below for 'contiguous', though.)
1488 const char *s = NULL;
1491 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1492 /* Do the mask check only if the args seem like aligned. */
1494 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1496 /* See if all the arguments are contiguous in memory. Note
1497 * that 'contiguous' is a loose term because some platforms
1498 * align the argv[] and the envp[]. If the arguments look
1499 * like non-aligned, assume that they are 'strictly' or
1500 * 'traditionally' contiguous. If the arguments look like
1501 * aligned, we just check that they are within aligned
1502 * PTRSIZE bytes. As long as no system has something bizarre
1503 * like the argv[] interleaved with some other data, we are
1504 * fine. (Did I just evoke Murphy's Law?) --jhi */
1505 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1507 for (i = 1; i < PL_origargc; i++) {
1508 if ((PL_origargv[i] == s + 1
1510 || PL_origargv[i] == s + 2
1515 (PL_origargv[i] > s &&
1517 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1528 #ifndef PERL_USE_SAFE_PUTENV
1529 /* Can we grab env area too to be used as the area for $0? */
1530 if (s && PL_origenviron && !PL_use_safe_putenv) {
1531 if ((PL_origenviron[0] == s + 1)
1534 (PL_origenviron[0] > s &&
1535 PL_origenviron[0] <=
1536 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1539 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1540 s = PL_origenviron[0];
1543 my_setenv("NoNe SuCh", NULL);
1544 /* Force copy of environment. */
1545 for (i = 1; PL_origenviron[i]; i++) {
1546 if (PL_origenviron[i] == s + 1
1549 (PL_origenviron[i] > s &&
1550 PL_origenviron[i] <=
1551 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1554 s = PL_origenviron[i];
1562 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1564 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1569 /* Come here if running an undumped a.out. */
1571 PL_origfilename = savepv(argv[0]);
1572 PL_do_undump = FALSE;
1573 cxstack_ix = -1; /* start label stack again */
1575 assert (!PL_tainted);
1577 S_set_caret_X(aTHX);
1579 init_postdump_symbols(argc,argv,env);
1584 op_free(PL_main_root);
1585 PL_main_root = NULL;
1587 PL_main_start = NULL;
1588 SvREFCNT_dec(PL_main_cv);
1592 oldscope = PL_scopestack_ix;
1593 PL_dowarn = G_WARN_OFF;
1598 parse_body(env,xsinit);
1600 call_list(oldscope, PL_unitcheckav);
1602 call_list(oldscope, PL_checkav);
1609 /* my_exit() was called */
1610 while (PL_scopestack_ix > oldscope)
1613 PL_curstash = PL_defstash;
1615 call_list(oldscope, PL_unitcheckav);
1617 call_list(oldscope, PL_checkav);
1621 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1629 #define INCPUSH_UNSHIFT 0x01
1630 #define INCPUSH_ADD_OLD_VERS 0x02
1631 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1632 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1633 #define INCPUSH_NOT_BASEDIR 0x10
1634 #define INCPUSH_CAN_RELOCATE 0x20
1635 #define INCPUSH_ADD_SUB_DIRS \
1636 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1639 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1643 int argc = PL_origargc;
1644 char **argv = PL_origargv;
1645 const char *scriptname = NULL;
1646 VOL bool dosearch = FALSE;
1648 const char *cddir = NULL;
1649 #ifdef USE_SITECUSTOMIZE
1650 bool minus_f = FALSE;
1652 SV *linestr_sv = newSV_type(SVt_PVIV);
1653 bool add_read_e_script = FALSE;
1655 SvGROW(linestr_sv, 80);
1656 sv_setpvs(linestr_sv,"");
1662 for (argc--,argv++; argc > 0; argc--,argv++) {
1663 if (argv[0][0] != '-' || !argv[0][1])
1669 #ifndef PERL_STRICT_CR
1693 if ((s = moreswitches(s)))
1698 CHECK_MALLOC_TOO_LATE_FOR('t');
1699 if( !PL_tainting ) {
1700 PL_taint_warn = TRUE;
1706 CHECK_MALLOC_TOO_LATE_FOR('T');
1708 PL_taint_warn = FALSE;
1716 forbid_setid('e', FALSE);
1718 PL_e_script = newSVpvs("");
1719 add_read_e_script = TRUE;
1722 sv_catpv(PL_e_script, s);
1724 sv_catpv(PL_e_script, argv[1]);
1728 Perl_croak(aTHX_ "No code specified for -%c", c);
1729 sv_catpvs(PL_e_script, "\n");
1733 #ifdef USE_SITECUSTOMIZE
1739 case 'I': /* -I handled both here and in moreswitches() */
1740 forbid_setid('I', FALSE);
1741 if (!*++s && (s=argv[1]) != NULL) {
1745 STRLEN len = strlen(s);
1746 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1749 Perl_croak(aTHX_ "No directory specified for -I");
1752 forbid_setid('S', FALSE);
1760 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1762 /* Can't do newSVpvs() as that would involve pre-processor
1763 condititionals inside a macro expansion. */
1764 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1771 # ifdef PERL_DONT_CREATE_GVSV
1772 " PERL_DONT_CREATE_GVSV"
1774 # ifdef PERL_MALLOC_WRAP
1777 # ifdef PERL_MEM_LOG
1780 # ifdef PERL_MEM_LOG_ENV
1783 # ifdef PERL_MEM_LOG_ENV_FD
1784 " PERL_MEM_LOG_ENV_FD"
1786 # ifdef PERL_MEM_LOG_STDERR
1787 " PERL_MEM_LOG_STDERR"
1789 # ifdef PERL_MEM_LOG_TIMESTAMP
1790 " PERL_MEM_LOG_TIMESTAMP"
1792 # ifdef PERL_USE_DEVEL
1795 # ifdef PERL_USE_SAFE_PUTENV
1796 " PERL_USE_SAFE_PUTENV"
1798 # ifdef USE_SITECUSTOMIZE
1799 " USE_SITECUSTOMIZE"
1801 # ifdef USE_FAST_STDIO
1806 sv_catpv(opts_prog, PL_bincompat_options);
1807 /* Terminate the qw(, and then wrap at 76 columns. */
1808 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1810 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1812 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1814 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1816 #if defined(LOCAL_PATCH_COUNT)
1817 if (LOCAL_PATCH_COUNT > 0) {
1819 sv_catpvs(opts_prog,
1820 "\" Locally applied patches:\\n\",");
1821 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1822 if (PL_localpatches[i])
1823 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1824 0, PL_localpatches[i], 0);
1828 Perl_sv_catpvf(aTHX_ opts_prog,
1829 "\" Built under %s\\n",OSNAME);
1832 sv_catpvs(opts_prog,
1833 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1835 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1838 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1839 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1840 "sort grep {/^PERL/} keys %ENV; ");
1842 sv_catpvs(opts_prog,
1843 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1845 sv_catpvs(opts_prog,
1846 "print \" \\%ENV:\\n @env\\n\" if @env;"
1847 "print \" \\@INC:\\n @INC\\n\";");
1851 opts_prog = Perl_newSVpvf(aTHX_
1852 "Config::config_vars(qw%c%s%c)",
1856 av_push(PL_preambleav, opts_prog);
1857 /* don't look for script or read stdin */
1858 scriptname = BIT_BUCKET;
1862 PL_doextract = TRUE;
1870 if (!*++s || isSPACE(*s)) {
1874 /* catch use of gnu style long options */
1875 if (strEQ(s, "version")) {
1879 if (strEQ(s, "help")) {
1886 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1897 #ifndef SECURE_INTERNAL_GETENV
1900 (s = PerlEnv_getenv("PERL5OPT")))
1904 if (*s == '-' && *(s+1) == 'T') {
1905 CHECK_MALLOC_TOO_LATE_FOR('T');
1907 PL_taint_warn = FALSE;
1910 char *popt_copy = NULL;
1923 if (!strchr("CDIMUdmtwW", *s))
1924 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1928 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1929 s = popt_copy + (s - d);
1937 if( !PL_tainting ) {
1938 PL_taint_warn = TRUE;
1949 #ifdef USE_SITECUSTOMIZE
1951 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1952 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1957 scriptname = argv[0];
1960 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1962 else if (scriptname == NULL) {
1964 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1970 /* Set $^X early so that it can be used for relocatable paths in @INC */
1971 assert (!PL_tainted);
1973 S_set_caret_X(aTHX);
1978 bool suidscript = FALSE;
1980 open_script(scriptname, dosearch, &suidscript, &rsfp);
1982 validate_suid(validarg, scriptname, fdscript, suidscript,
1986 # if defined(SIGCHLD) || defined(SIGCLD)
1989 # define SIGCHLD SIGCLD
1991 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1992 if (sigstate == (Sighandler_t) SIG_IGN) {
1993 if (ckWARN(WARN_SIGNAL))
1994 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1995 "Can't ignore signal CHLD, forcing to default");
1996 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2004 /* This will croak if suidscript is true, as -x cannot be used with
2006 forbid_setid('x', suidscript);
2007 /* Hence you can't get here if suidscript is true */
2009 find_beginning(linestr_sv, rsfp);
2010 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2011 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2015 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2016 CvUNIQUE_on(PL_compcv);
2018 CvPADLIST(PL_compcv) = pad_new(0);
2020 PL_isarev = newHV();
2023 boot_core_UNIVERSAL();
2027 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2029 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2035 # ifdef HAS_SOCKS5_INIT
2036 socks5_init(argv[0]);
2042 init_predump_symbols();
2043 /* init_postdump_symbols not currently designed to be called */
2044 /* more than once (ENV isn't cleared first, for example) */
2045 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2047 init_postdump_symbols(argc,argv,env);
2049 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2050 * or explicitly in some platforms.
2051 * locale.c:Perl_init_i18nl10n() if the environment
2052 * look like the user wants to use UTF-8. */
2053 #if defined(__SYMBIAN32__)
2054 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2057 /* Requires init_predump_symbols(). */
2058 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2063 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2064 * and the default open disciplines. */
2065 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2066 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2068 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2069 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2070 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2072 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2073 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2074 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2076 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2077 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2078 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2080 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2081 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2084 sv_setpvs(sv, ":utf8\0:utf8");
2086 sv_setpvs(sv, ":utf8\0");
2089 sv_setpvs(sv, "\0:utf8");
2097 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2098 if (strEQ(s, "unsafe"))
2099 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2100 else if (strEQ(s, "safe"))
2101 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2103 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2110 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2114 PL_xmlfp = PerlIO_stdout();
2116 PL_xmlfp = PerlIO_open(s, "w");
2118 Perl_croak(aTHX_ "Can't open %s", s);
2120 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2126 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2127 PL_madskills = atoi(s);
2128 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2133 lex_start(linestr_sv, rsfp, TRUE);
2134 PL_subname = newSVpvs("main");
2136 if (add_read_e_script)
2137 filter_add(read_e_script, NULL);
2139 /* now parse the script */
2141 SETERRNO(0,SS_NORMAL);
2142 if (yyparse() || PL_parser->error_count) {
2144 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2146 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2150 CopLINE_set(PL_curcop, 0);
2151 PL_curstash = PL_defstash;
2153 SvREFCNT_dec(PL_e_script);
2161 SAVECOPFILE(PL_curcop);
2162 SAVECOPLINE(PL_curcop);
2163 gv_check(PL_defstash);
2172 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2173 dump_mstats("after compilation:");
2183 =for apidoc perl_run
2185 Tells a Perl interpreter to run. See L<perlembed>.
2198 PERL_ARGS_ASSERT_PERL_RUN;
2199 #ifndef MULTIPLICITY
2200 PERL_UNUSED_ARG(my_perl);
2203 oldscope = PL_scopestack_ix;
2211 cxstack_ix = -1; /* start context stack again */
2213 case 0: /* normal completion */
2217 case 2: /* my_exit() */
2218 while (PL_scopestack_ix > oldscope)
2221 PL_curstash = PL_defstash;
2222 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2223 PL_endav && !PL_minus_c)
2224 call_list(oldscope, PL_endav);
2226 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2227 dump_mstats("after execution: ");
2233 POPSTACK_TO(PL_mainstack);
2236 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2247 S_run_body(pTHX_ I32 oldscope)
2250 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2251 PL_sawampersand ? "Enabling" : "Omitting"));
2253 if (!PL_restartop) {
2257 exit(0); /* less likely to core dump than my_exit(0) */
2260 DEBUG_x(dump_all());
2263 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2267 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2270 if (PERLDB_SINGLE && PL_DBsingle)
2271 sv_setiv(PL_DBsingle, 1);
2273 call_list(oldscope, PL_initav);
2274 #ifdef PERL_DEBUG_READONLY_OPS
2275 Perl_pending_Slabs_to_ro(aTHX);
2282 PL_op = PL_restartop;
2286 else if (PL_main_start) {
2287 CvDEPTH(PL_main_cv) = 1;
2288 PL_op = PL_main_start;
2296 =head1 SV Manipulation Functions
2298 =for apidoc p||get_sv
2300 Returns the SV of the specified Perl scalar. C<flags> are passed to
2301 C<gv_fetchpv>. If C<GV_ADD> is set and the
2302 Perl variable does not exist then it will be created. If C<flags> is zero
2303 and the variable does not exist then NULL is returned.
2309 Perl_get_sv(pTHX_ const char *name, I32 flags)
2313 PERL_ARGS_ASSERT_GET_SV;
2315 gv = gv_fetchpv(name, flags, SVt_PV);
2322 =head1 Array Manipulation Functions
2324 =for apidoc p||get_av
2326 Returns the AV of the specified Perl array. C<flags> are passed to
2327 C<gv_fetchpv>. If C<GV_ADD> is set and the
2328 Perl variable does not exist then it will be created. If C<flags> is zero
2329 and the variable does not exist then NULL is returned.
2335 Perl_get_av(pTHX_ const char *name, I32 flags)
2337 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2339 PERL_ARGS_ASSERT_GET_AV;
2349 =head1 Hash Manipulation Functions
2351 =for apidoc p||get_hv
2353 Returns the HV of the specified Perl hash. C<flags> are passed to
2354 C<gv_fetchpv>. If C<GV_ADD> is set and the
2355 Perl variable does not exist then it will be created. If C<flags> is zero
2356 and the variable does not exist then NULL is returned.
2362 Perl_get_hv(pTHX_ const char *name, I32 flags)
2364 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2366 PERL_ARGS_ASSERT_GET_HV;
2376 =head1 CV Manipulation Functions
2378 =for apidoc p||get_cvn_flags
2380 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2381 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2382 exist then it will be declared (which has the same effect as saying
2383 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2384 then NULL is returned.
2386 =for apidoc p||get_cv
2388 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2394 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2396 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2397 /* XXX this is probably not what they think they're getting.
2398 * It has the same effect as "sub name;", i.e. just a forward
2401 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2403 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2404 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2405 return newSUB(start_subparse(FALSE, 0),
2406 newSVOP(OP_CONST, 0, sv),
2414 /* Nothing in core calls this now, but we can't replace it with a macro and
2415 move it to mathoms.c as a macro would evaluate name twice. */
2417 Perl_get_cv(pTHX_ const char *name, I32 flags)
2419 PERL_ARGS_ASSERT_GET_CV;
2421 return get_cvn_flags(name, strlen(name), flags);
2424 /* Be sure to refetch the stack pointer after calling these routines. */
2428 =head1 Callback Functions
2430 =for apidoc p||call_argv
2432 Performs a callback to the specified Perl sub. See L<perlcall>.
2438 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2440 /* See G_* flags in cop.h */
2441 /* null terminated arg list */
2446 PERL_ARGS_ASSERT_CALL_ARGV;
2451 mXPUSHs(newSVpv(*argv,0));
2456 return call_pv(sub_name, flags);
2460 =for apidoc p||call_pv
2462 Performs a callback to the specified Perl sub. See L<perlcall>.
2468 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2469 /* name of the subroutine */
2470 /* See G_* flags in cop.h */
2472 PERL_ARGS_ASSERT_CALL_PV;
2474 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2478 =for apidoc p||call_method
2480 Performs a callback to the specified Perl method. The blessed object must
2481 be on the stack. See L<perlcall>.
2487 Perl_call_method(pTHX_ const char *methname, I32 flags)
2488 /* name of the subroutine */
2489 /* See G_* flags in cop.h */
2491 PERL_ARGS_ASSERT_CALL_METHOD;
2493 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2496 /* May be called with any of a CV, a GV, or an SV containing the name. */
2498 =for apidoc p||call_sv
2500 Performs a callback to the Perl sub whose name is in the SV. See
2507 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2508 /* See G_* flags in cop.h */
2511 LOGOP myop; /* fake syntax tree node */
2516 bool oldcatch = CATCH_GET;
2518 OP* const oldop = PL_op;
2521 PERL_ARGS_ASSERT_CALL_SV;
2523 if (flags & G_DISCARD) {
2527 if (!(flags & G_WANT)) {
2528 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2533 Zero(&myop, 1, LOGOP);
2534 myop.op_next = NULL;
2535 if (!(flags & G_NOARGS))
2536 myop.op_flags |= OPf_STACKED;
2537 myop.op_flags |= OP_GIMME_REVERSE(flags);
2541 EXTEND(PL_stack_sp, 1);
2542 *++PL_stack_sp = sv;
2544 oldscope = PL_scopestack_ix;
2546 if (PERLDB_SUB && PL_curstash != PL_debstash
2547 /* Handle first BEGIN of -d. */
2548 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2549 /* Try harder, since this may have been a sighandler, thus
2550 * curstash may be meaningless. */
2551 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2552 && !(flags & G_NODEBUG))
2553 PL_op->op_private |= OPpENTERSUB_DB;
2555 if (flags & G_METHOD) {
2556 Zero(&method_op, 1, UNOP);
2557 method_op.op_next = PL_op;
2558 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2559 method_op.op_type = OP_METHOD;
2560 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2561 myop.op_type = OP_ENTERSUB;
2562 PL_op = (OP*)&method_op;
2565 if (!(flags & G_EVAL)) {
2567 CALL_BODY_SUB((OP*)&myop);
2568 retval = PL_stack_sp - (PL_stack_base + oldmark);
2569 CATCH_SET(oldcatch);
2572 myop.op_other = (OP*)&myop;
2574 create_eval_scope(flags|G_FAKINGEVAL);
2582 CALL_BODY_SUB((OP*)&myop);
2583 retval = PL_stack_sp - (PL_stack_base + oldmark);
2584 if (!(flags & G_KEEPERR)) {
2592 /* my_exit() was called */
2593 PL_curstash = PL_defstash;
2596 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2597 Perl_croak(aTHX_ "Callback called exit");
2602 PL_op = PL_restartop;
2606 PL_stack_sp = PL_stack_base + oldmark;
2607 if ((flags & G_WANT) == G_ARRAY)
2611 *++PL_stack_sp = &PL_sv_undef;
2616 if (PL_scopestack_ix > oldscope)
2617 delete_eval_scope();
2621 if (flags & G_DISCARD) {
2622 PL_stack_sp = PL_stack_base + oldmark;
2631 /* Eval a string. The G_EVAL flag is always assumed. */
2634 =for apidoc p||eval_sv
2636 Tells Perl to C<eval> the string in the SV.
2642 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2644 /* See G_* flags in cop.h */
2648 UNOP myop; /* fake syntax tree node */
2649 VOL I32 oldmark = SP - PL_stack_base;
2652 OP* const oldop = PL_op;
2655 PERL_ARGS_ASSERT_EVAL_SV;
2657 if (flags & G_DISCARD) {
2664 Zero(PL_op, 1, UNOP);
2665 EXTEND(PL_stack_sp, 1);
2666 *++PL_stack_sp = sv;
2668 if (!(flags & G_NOARGS))
2669 myop.op_flags = OPf_STACKED;
2670 myop.op_next = NULL;
2671 myop.op_type = OP_ENTEREVAL;
2672 myop.op_flags |= OP_GIMME_REVERSE(flags);
2673 if (flags & G_KEEPERR)
2674 myop.op_flags |= OPf_SPECIAL;
2676 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2677 * before a PUSHEVAL, which corrupts the stack after a croak */
2678 TAINT_PROPER("eval_sv()");
2684 CALL_BODY_EVAL((OP*)&myop);
2685 retval = PL_stack_sp - (PL_stack_base + oldmark);
2686 if (!(flags & G_KEEPERR)) {
2694 /* my_exit() was called */
2695 PL_curstash = PL_defstash;
2698 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2699 Perl_croak(aTHX_ "Callback called exit");
2704 PL_op = PL_restartop;
2708 PL_stack_sp = PL_stack_base + oldmark;
2709 if ((flags & G_WANT) == G_ARRAY)
2713 *++PL_stack_sp = &PL_sv_undef;
2719 if (flags & G_DISCARD) {
2720 PL_stack_sp = PL_stack_base + oldmark;
2730 =for apidoc p||eval_pv
2732 Tells Perl to C<eval> the given string and return an SV* result.
2738 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2742 SV* sv = newSVpv(p, 0);
2744 PERL_ARGS_ASSERT_EVAL_PV;
2746 eval_sv(sv, G_SCALAR);
2753 if (croak_on_error && SvTRUE(ERRSV)) {
2754 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2760 /* Require a module. */
2763 =head1 Embedding Functions
2765 =for apidoc p||require_pv
2767 Tells Perl to C<require> the file named by the string argument. It is
2768 analogous to the Perl code C<eval "require '$file'">. It's even
2769 implemented that way; consider using load_module instead.
2774 Perl_require_pv(pTHX_ const char *pv)
2780 PERL_ARGS_ASSERT_REQUIRE_PV;
2782 PUSHSTACKi(PERLSI_REQUIRE);
2784 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2785 eval_sv(sv_2mortal(sv), G_DISCARD);
2791 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2793 /* This message really ought to be max 23 lines.
2794 * Removed -h because the user already knows that option. Others? */
2796 static const char * const usage_msg[] = {
2797 "-0[octal] specify record separator (\\0, if no argument)",
2798 "-a autosplit mode with -n or -p (splits $_ into @F)",
2799 "-C[number/list] enables the listed Unicode features",
2800 "-c check syntax only (runs BEGIN and CHECK blocks)",
2801 "-d[:debugger] run program under debugger",
2802 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2803 "-e program one line of program (several -e's allowed, omit programfile)",
2804 "-E program like -e, but enables all optional features",
2805 "-f don't do $sitelib/sitecustomize.pl at startup",
2806 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2807 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2808 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2809 "-l[octal] enable line ending processing, specifies line terminator",
2810 "-[mM][-]module execute \"use/no module...\" before executing program",
2811 "-n assume \"while (<>) { ... }\" loop around program",
2812 "-p assume loop like -n but print line also, like sed",
2813 "-s enable rudimentary parsing for switches after programfile",
2814 "-S look for programfile using PATH environment variable",
2815 "-t enable tainting warnings",
2816 "-T enable tainting checks",
2817 "-u dump core after parsing program",
2818 "-U allow unsafe operations",
2819 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2820 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2821 "-w enable many useful warnings (RECOMMENDED)",
2822 "-W enable all warnings",
2823 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2824 "-X disable all warnings",
2828 const char * const *p = usage_msg;
2830 PERL_ARGS_ASSERT_USAGE;
2832 PerlIO_printf(PerlIO_stdout(),
2833 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2836 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2839 /* convert a string of -D options (or digits) into an int.
2840 * sets *s to point to the char after the options */
2844 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2846 static const char * const usage_msgd[] = {
2847 " Debugging flag values: (see also -d)",
2848 " p Tokenizing and parsing (with v, displays parse stack)",
2849 " s Stack snapshots (with v, displays all stacks)",
2850 " l Context (loop) stack processing",
2851 " t Trace execution",
2852 " o Method and overloading resolution",
2853 " c String/numeric conversions",
2854 " P Print profiling info, source file input state",
2855 " m Memory and SV allocation",
2856 " f Format processing",
2857 " r Regular expression parsing and execution",
2858 " x Syntax tree dump",
2859 " u Tainting checks",
2860 " H Hash dump -- usurps values()",
2861 " X Scratchpad allocation",
2864 " R Include reference counts of dumped variables (eg when using -Ds)",
2865 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2866 " v Verbose: use in conjunction with other flags",
2868 " A Consistency checks on internal structures",
2869 " q quiet - currently only suppresses the 'EXECUTING' message",
2874 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2877 /* if adding extra options, remember to update DEBUG_MASK */
2878 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2880 for (; isALNUM(**s); (*s)++) {
2881 const char * const d = strchr(debopts,**s);
2883 i |= 1 << (d - debopts);
2884 else if (ckWARN_d(WARN_DEBUGGING))
2885 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2886 "invalid option -D%c, use -D'' to see choices\n", **s);
2889 else if (isDIGIT(**s)) {
2891 for (; isALNUM(**s); (*s)++) ;
2893 else if (givehelp) {
2894 const char *const *p = usage_msgd;
2895 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2898 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2899 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2900 "-Dp not implemented on this platform\n");
2906 /* This routine handles any switches that can be given during run */
2909 Perl_moreswitches(pTHX_ const char *s)
2913 const char option = *s; /* used to remember option in -m/-M code */
2915 PERL_ARGS_ASSERT_MORESWITCHES;
2923 SvREFCNT_dec(PL_rs);
2924 if (s[1] == 'x' && s[2]) {
2925 const char *e = s+=2;
2931 flags = PERL_SCAN_SILENT_ILLDIGIT;
2932 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2933 if (s + numlen < e) {
2934 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2938 PL_rs = newSVpvs("");
2939 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2940 tmps = (U8*)SvPVX(PL_rs);
2941 uvchr_to_utf8(tmps, rschar);
2942 SvCUR_set(PL_rs, UNISKIP(rschar));
2947 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2948 if (rschar & ~((U8)~0))
2949 PL_rs = &PL_sv_undef;
2950 else if (!rschar && numlen >= 2)
2951 PL_rs = newSVpvs("");
2953 char ch = (char)rschar;
2954 PL_rs = newSVpvn(&ch, 1);
2957 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2962 PL_unicode = parse_unicode_opts( (const char **)&s );
2963 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2969 while (*s && !isSPACE(*s)) ++s;
2970 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2981 forbid_setid('d', FALSE);
2984 /* -dt indicates to the debugger that threads will be used */
2985 if (*s == 't' && !isALNUM(s[1])) {
2987 my_setenv("PERL5DB_THREADED", "1");
2990 /* The following permits -d:Mod to accepts arguments following an =
2991 in the fashion that -MSome::Mod does. */
2992 if (*s == ':' || *s == '=') {
2993 const char *start = ++s;
2994 const char *const end = s + strlen(s);
2995 SV * const sv = newSVpvs("use Devel::");
2997 /* We now allow -d:Module=Foo,Bar */
2998 while(isALNUM(*s) || *s==':') ++s;
3000 sv_catpvn(sv, start, end - start);
3002 sv_catpvn(sv, start, s-start);
3003 /* Don't use NUL as q// delimiter here, this string goes in the
3005 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3008 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3012 PL_perldb = PERLDB_ALL;
3019 forbid_setid('D', FALSE);
3021 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3022 #else /* !DEBUGGING */
3023 if (ckWARN_d(WARN_DEBUGGING))
3024 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3025 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3026 for (s++; isALNUM(*s); s++) ;
3031 usage(PL_origargv[0]);
3034 Safefree(PL_inplace);
3035 #if defined(__CYGWIN__) /* do backup extension automagically */
3036 if (*(s+1) == '\0') {
3037 PL_inplace = savepvs(".bak");
3040 #endif /* __CYGWIN__ */
3042 const char * const start = ++s;
3043 while (*s && !isSPACE(*s))
3046 PL_inplace = savepvn(start, s - start);
3050 if (*s == '-') /* Additional switches on #! line. */
3054 case 'I': /* -I handled both here and in parse_body() */
3055 forbid_setid('I', FALSE);
3057 while (*s && isSPACE(*s))
3062 /* ignore trailing spaces (possibly followed by other switches) */
3064 for (e = p; *e && !isSPACE(*e); e++) ;
3068 } while (*p && *p != '-');
3070 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3076 Perl_croak(aTHX_ "No directory specified for -I");
3082 SvREFCNT_dec(PL_ors_sv);
3088 PL_ors_sv = newSVpvs("\n");
3089 numlen = 3 + (*s == '0');
3090 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3094 if (RsPARA(PL_rs)) {
3095 PL_ors_sv = newSVpvs("\n\n");
3098 PL_ors_sv = newSVsv(PL_rs);
3103 forbid_setid('M', FALSE); /* XXX ? */
3106 forbid_setid('m', FALSE); /* XXX ? */
3111 const char *use = "use ";
3113 /* -M-foo == 'no foo' */
3114 /* Leading space on " no " is deliberate, to make both
3115 possibilities the same length. */
3116 if (*s == '-') { use = " no "; ++s; }
3117 sv = newSVpvn(use,4);
3119 /* We allow -M'Module qw(Foo Bar)' */
3120 while(isALNUM(*s) || *s==':') {
3129 Perl_croak(aTHX_ "Module name required with -%c option",
3132 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3133 "contains single ':'",
3134 (int)(s - start), start, option);
3135 end = s + strlen(s);
3137 sv_catpvn(sv, start, end - start);
3138 if (option == 'm') {
3140 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3141 sv_catpvs( sv, " ()");
3144 sv_catpvn(sv, start, s-start);
3145 /* Use NUL as q''-delimiter. */
3146 sv_catpvs(sv, " split(/,/,q\0");
3148 sv_catpvn(sv, s, end - s);
3149 sv_catpvs(sv, "\0)");
3152 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3155 Perl_croak(aTHX_ "Missing argument to -%c", option);
3166 forbid_setid('s', FALSE);
3167 PL_doswitches = TRUE;
3181 PL_do_undump = TRUE;
3189 if (!sv_derived_from(PL_patchlevel, "version"))
3190 upg_version(PL_patchlevel, TRUE);
3193 SV* level= vstringify(PL_patchlevel);
3194 #ifdef PERL_PATCHNUM
3195 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3196 SV *num = newSVpvs(PERL_PATCHNUM "*");
3198 SV *num = newSVpvs(PERL_PATCHNUM);
3201 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3202 SvREFCNT_dec(level);
3205 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3209 PerlIO_printf(PerlIO_stdout(),
3210 "\nThis is perl, %"SVf
3214 SvREFCNT_dec(level);
3217 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3218 PerlIO_printf(PerlIO_stdout(),
3219 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3220 SVfARG(vstringify(PL_patchlevel))));
3221 PerlIO_printf(PerlIO_stdout(),
3222 Perl_form(aTHX_ " built under %s at %s %s\n",
3223 OSNAME, __DATE__, __TIME__));
3224 PerlIO_printf(PerlIO_stdout(),
3225 Perl_form(aTHX_ " OS Specific Release: %s\n",
3228 #if defined(LOCAL_PATCH_COUNT)
3229 if (LOCAL_PATCH_COUNT > 0)
3230 PerlIO_printf(PerlIO_stdout(),
3231 "\n(with %d registered patch%s, "
3232 "see perl -V for more detail)",
3234 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3237 PerlIO_printf(PerlIO_stdout(),
3238 "\n\nCopyright 1987-2009, Larry Wall\n");
3240 PerlIO_printf(PerlIO_stdout(),
3241 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3244 PerlIO_printf(PerlIO_stdout(),
3245 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3246 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3249 PerlIO_printf(PerlIO_stdout(),
3250 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3251 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3254 PerlIO_printf(PerlIO_stdout(),
3255 "atariST series port, ++jrb bammi@cadence.com\n");
3258 PerlIO_printf(PerlIO_stdout(),
3259 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3262 PerlIO_printf(PerlIO_stdout(),
3263 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3266 PerlIO_printf(PerlIO_stdout(),
3267 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3270 PerlIO_printf(PerlIO_stdout(),
3271 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3274 PerlIO_printf(PerlIO_stdout(),
3275 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3278 PerlIO_printf(PerlIO_stdout(),
3279 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3282 PerlIO_printf(PerlIO_stdout(),
3283 "MiNT port by Guido Flohr, 1997-1999\n");
3286 PerlIO_printf(PerlIO_stdout(),
3287 "EPOC port by Olaf Flebbe, 1999-2002\n");
3290 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3291 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3294 #ifdef __SYMBIAN32__
3295 PerlIO_printf(PerlIO_stdout(),
3296 "Symbian port by Nokia, 2004-2005\n");
3298 #ifdef BINARY_BUILD_NOTICE
3299 BINARY_BUILD_NOTICE;
3301 PerlIO_printf(PerlIO_stdout(),
3303 Perl may be copied only under the terms of either the Artistic License or the\n\
3304 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3305 Complete documentation for Perl, including FAQ lists, should be found on\n\
3306 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3307 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3310 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3311 PL_dowarn |= G_WARN_ON;
3316 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3317 if (!specialWARN(PL_compiling.cop_warnings))
3318 PerlMemShared_free(PL_compiling.cop_warnings);
3319 PL_compiling.cop_warnings = pWARN_ALL ;
3323 PL_dowarn = G_WARN_ALL_OFF;
3324 if (!specialWARN(PL_compiling.cop_warnings))
3325 PerlMemShared_free(PL_compiling.cop_warnings);
3326 PL_compiling.cop_warnings = pWARN_NONE ;
3333 if (s[0] == '-') /* Additional switches on #! line. */
3338 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3344 #ifdef ALTERNATE_SHEBANG
3345 case 'S': /* OS/2 needs -S on "extproc" line. */
3349 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3354 /* compliments of Tom Christiansen */
3356 /* unexec() can be found in the Gnu emacs distribution */
3357 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3360 Perl_my_unexec(pTHX)
3362 PERL_UNUSED_CONTEXT;
3364 SV * prog = newSVpv(BIN_EXP, 0);
3365 SV * file = newSVpv(PL_origfilename, 0);
3369 sv_catpvs(prog, "/perl");
3370 sv_catpvs(file, ".perldump");
3372 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3373 /* unexec prints msg to stderr in case of failure */
3374 PerlProc_exit(status);
3377 # include <lib$routines.h>
3378 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3379 # elif defined(WIN32) || defined(__CYGWIN__)
3380 Perl_croak(aTHX_ "dump is not supported");
3382 ABORT(); /* for use with undump */
3387 /* initialize curinterp */
3393 # define PERLVAR(var,type)
3394 # define PERLVARA(var,n,type)
3395 # if defined(PERL_IMPLICIT_CONTEXT)
3396 # define PERLVARI(var,type,init) aTHX->var = init;
3397 # define PERLVARIC(var,type,init) aTHX->var = init;
3399 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3400 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3402 # include "intrpvar.h"
3408 # define PERLVAR(var,type)
3409 # define PERLVARA(var,n,type)
3410 # define PERLVARI(var,type,init) PL_##var = init;
3411 # define PERLVARIC(var,type,init) PL_##var = init;
3412 # include "intrpvar.h"
3419 /* As these are inside a structure, PERLVARI isn't capable of initialising
3421 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3422 PL_reg_poscache = PL_reg_starttry = NULL;
3426 S_init_main_stash(pTHX)
3431 PL_curstash = PL_defstash = newHV();
3432 /* We know that the string "main" will be in the global shared string
3433 table, so it's a small saving to use it rather than allocate another
3435 PL_curstname = newSVpvs_share("main");
3436 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3437 /* If we hadn't caused another reference to "main" to be in the shared
3438 string table above, then it would be worth reordering these two,
3439 because otherwise all we do is delete "main" from it as a consequence
3440 of the SvREFCNT_dec, only to add it again with hv_name_set */
3441 SvREFCNT_dec(GvHV(gv));
3442 hv_name_set(PL_defstash, "main", 4, 0);
3443 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3445 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3447 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3448 GvMULTI_on(PL_incgv);
3449 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3450 GvMULTI_on(PL_hintgv);
3451 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3452 SvREFCNT_inc_simple_void(PL_defgv);
3453 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3454 SvREFCNT_inc_simple_void(PL_errgv);
3455 GvMULTI_on(PL_errgv);
3456 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3457 GvMULTI_on(PL_replgv);
3458 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3459 #ifdef PERL_DONT_CREATE_GVSV
3462 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3464 PL_curstash = PL_defstash;
3465 CopSTASH_set(&PL_compiling, PL_defstash);
3466 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3467 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3469 /* We must init $/ before switches are processed. */
3470 sv_setpvs(get_sv("/", GV_ADD), "\n");
3474 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3475 bool *suidscript, PerlIO **rsfpp)
3480 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3483 PL_origfilename = savepvs("-e");
3486 /* if find_script() returns, it returns a malloc()-ed value */
3487 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3489 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3490 const char *s = scriptname + 8;
3496 * Tell apart "normal" usage of fdscript, e.g.
3497 * with bash on FreeBSD:
3498 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3499 * from usage in suidperl.
3500 * Does any "normal" usage leave garbage after the number???
3501 * Is it a mistake to use a similar /dev/fd/ construct for
3506 * Be supersafe and do some sanity-checks.
3507 * Still, can we be sure we got the right thing?
3510 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3513 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3515 scriptname = savepv(s + 1);
3516 Safefree(PL_origfilename);
3517 PL_origfilename = (char *)scriptname;
3522 CopFILE_free(PL_curcop);
3523 CopFILE_set(PL_curcop, PL_origfilename);
3524 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3525 scriptname = (char *)"";
3526 if (fdscript >= 0) {
3527 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3528 # if defined(HAS_FCNTL) && defined(F_SETFD)
3530 /* ensure close-on-exec */
3531 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3534 else if (!*scriptname) {
3535 forbid_setid(0, *suidscript);
3536 *rsfpp = PerlIO_stdin();
3539 #ifdef FAKE_BIT_BUCKET
3540 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3541 * is called) and still have the "-e" work. (Believe it or not,
3542 * a /dev/null is required for the "-e" to work because source
3543 * filter magic is used to implement it. ) This is *not* a general
3544 * replacement for a /dev/null. What we do here is create a temp
3545 * file (an empty file), open up that as the script, and then
3546 * immediately close and unlink it. Close enough for jazz. */
3547 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3548 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3549 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3550 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3551 FAKE_BIT_BUCKET_TEMPLATE
3553 const char * const err = "Failed to create a fake bit bucket";
3554 if (strEQ(scriptname, BIT_BUCKET)) {
3555 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3556 int tmpfd = mkstemp(tmpname);
3558 scriptname = tmpname;
3561 Perl_croak(aTHX_ err);
3564 scriptname = mktemp(tmpname);
3566 Perl_croak(aTHX_ err);
3571 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3572 #ifdef FAKE_BIT_BUCKET
3573 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3574 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3575 && strlen(scriptname) == sizeof(tmpname) - 1) {
3578 scriptname = BIT_BUCKET;
3580 # if defined(HAS_FCNTL) && defined(F_SETFD)
3582 /* ensure close-on-exec */
3583 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3587 /* PSz 16 Sep 03 Keep neat error message */
3589 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3591 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3592 CopFILE(PL_curcop), Strerror(errno));
3598 * I_SYSSTATVFS HAS_FSTATVFS
3600 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3601 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3602 * here so that metaconfig picks them up. */
3605 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3606 /* Don't even need this function. */
3609 S_validate_suid(pTHX_ PerlIO *rsfp)
3611 PERL_ARGS_ASSERT_VALIDATE_SUID;
3613 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3616 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3617 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3619 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3622 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3623 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3624 /* not set-id, must be wrapped */
3627 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3630 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3634 register const char *s2;
3636 PERL_ARGS_ASSERT_FIND_BEGINNING;
3638 /* skip forward in input to the real script? */
3640 while (PL_doextract) {
3641 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3642 Perl_croak(aTHX_ "No Perl script found in input\n");
3644 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3645 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3646 PL_doextract = FALSE;
3647 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3649 while (*s == ' ' || *s == '\t') s++;
3651 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3652 || s2[-1] == '_') s2--;
3653 if (strnEQ(s2-4,"perl",4))
3654 while ((s = moreswitches(s)))
3666 PL_uid = PerlProc_getuid();
3667 PL_euid = PerlProc_geteuid();
3668 PL_gid = PerlProc_getgid();
3669 PL_egid = PerlProc_getegid();
3671 PL_uid |= PL_gid << 16;
3672 PL_euid |= PL_egid << 16;
3674 /* Should not happen: */
3675 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3676 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3679 * Should go by suidscript, not uid!=euid: why disallow
3680 * system("ls") in scripts run from setuid things?
3681 * Or, is this run before we check arguments and set suidscript?
3682 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3683 * (We never have suidscript, can we be sure to have fdscript?)
3684 * Or must then go by UID checks? See comments in forbid_setid also.
3688 /* This is used very early in the lifetime of the program,
3689 * before even the options are parsed, so PL_tainting has
3690 * not been initialized properly. */
3692 Perl_doing_taint(int argc, char *argv[], char *envp[])
3694 #ifndef PERL_IMPLICIT_SYS
3695 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3696 * before we have an interpreter-- and the whole point of this
3697 * function is to be called at such an early stage. If you are on
3698 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3699 * "tainted because running with altered effective ids', you'll
3700 * have to add your own checks somewhere in here. The two most
3701 * known samples of 'implicitness' are Win32 and NetWare, neither
3702 * of which has much of concept of 'uids'. */
3703 int uid = PerlProc_getuid();
3704 int euid = PerlProc_geteuid();
3705 int gid = PerlProc_getgid();
3706 int egid = PerlProc_getegid();
3713 if (uid && (euid != uid || egid != gid))
3715 #endif /* !PERL_IMPLICIT_SYS */
3716 /* This is a really primitive check; environment gets ignored only
3717 * if -T are the first chars together; otherwise one gets
3718 * "Too late" message. */
3719 if ( argc > 1 && argv[1][0] == '-'
3720 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3725 /* Passing the flag as a single char rather than a string is a slight space
3726 optimisation. The only message that isn't /^-.$/ is
3727 "program input from stdin", which is substituted in place of '\0', which
3728 could never be a command line flag. */
3730 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3733 char string[3] = "-x";
3734 const char *message = "program input from stdin";
3741 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3742 if (PL_euid != PL_uid)
3743 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3744 if (PL_egid != PL_gid)
3745 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3746 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3748 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3752 Perl_init_debugger(pTHX)
3755 HV * const ostash = PL_curstash;
3757 PL_curstash = PL_debstash;
3758 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3760 AvREAL_off(PL_dbargs);
3761 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3762 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3763 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3764 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3765 sv_setiv(PL_DBsingle, 0);
3766 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3767 sv_setiv(PL_DBtrace, 0);
3768 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3769 sv_setiv(PL_DBsignal, 0);
3770 PL_curstash = ostash;
3773 #ifndef STRESS_REALLOC
3774 #define REASONABLE(size) (size)
3776 #define REASONABLE(size) (1) /* unreasonable */
3780 Perl_init_stacks(pTHX)
3783 /* start with 128-item stack and 8K cxstack */
3784 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3785 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3786 PL_curstackinfo->si_type = PERLSI_MAIN;
3787 PL_curstack = PL_curstackinfo->si_stack;
3788 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3790 PL_stack_base = AvARRAY(PL_curstack);
3791 PL_stack_sp = PL_stack_base;
3792 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3794 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3797 PL_tmps_max = REASONABLE(128);
3799 Newx(PL_markstack,REASONABLE(32),I32);
3800 PL_markstack_ptr = PL_markstack;
3801 PL_markstack_max = PL_markstack + REASONABLE(32);
3805 Newx(PL_scopestack,REASONABLE(32),I32);
3806 PL_scopestack_ix = 0;
3807 PL_scopestack_max = REASONABLE(32);
3809 Newx(PL_savestack,REASONABLE(128),ANY);
3810 PL_savestack_ix = 0;
3811 PL_savestack_max = REASONABLE(128);
3820 while (PL_curstackinfo->si_next)
3821 PL_curstackinfo = PL_curstackinfo->si_next;
3822 while (PL_curstackinfo) {
3823 PERL_SI *p = PL_curstackinfo->si_prev;
3824 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3825 Safefree(PL_curstackinfo->si_cxstack);
3826 Safefree(PL_curstackinfo);
3827 PL_curstackinfo = p;
3829 Safefree(PL_tmps_stack);
3830 Safefree(PL_markstack);
3831 Safefree(PL_scopestack);
3832 Safefree(PL_savestack);
3837 S_init_predump_symbols(pTHX)
3843 sv_setpvs(get_sv("\"", GV_ADD), " ");
3844 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3846 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3847 GvMULTI_on(PL_stdingv);
3848 io = GvIOp(PL_stdingv);
3849 IoTYPE(io) = IoTYPE_RDONLY;
3850 IoIFP(io) = PerlIO_stdin();
3851 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3853 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3855 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3858 IoTYPE(io) = IoTYPE_WRONLY;
3859 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3861 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3863 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3865 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3866 GvMULTI_on(PL_stderrgv);
3867 io = GvIOp(PL_stderrgv);
3868 IoTYPE(io) = IoTYPE_WRONLY;
3869 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3870 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3872 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3874 PL_statname = newSV(0); /* last filename we did stat on */
3876 Safefree(PL_osname);
3877 PL_osname = savepv(OSNAME);
3881 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3885 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3887 argc--,argv++; /* skip name of script */
3888 if (PL_doswitches) {
3889 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3893 if (argv[0][1] == '-' && !argv[0][2]) {
3897 if ((s = strchr(argv[0], '='))) {
3898 const char *const start_name = argv[0] + 1;
3899 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3900 TRUE, SVt_PV)), s + 1);
3903 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3906 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3907 GvMULTI_on(PL_argvgv);
3908 (void)gv_AVadd(PL_argvgv);
3909 av_clear(GvAVn(PL_argvgv));
3910 for (; argc > 0; argc--,argv++) {
3911 SV * const sv = newSVpv(argv[0],0);
3912 av_push(GvAVn(PL_argvgv),sv);
3913 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3914 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3917 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3918 (void)sv_utf8_decode(sv);
3924 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3929 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3931 PL_toptarget = newSV_type(SVt_PVFM);
3932 sv_setpvs(PL_toptarget, "");
3933 PL_bodytarget = newSV_type(SVt_PVFM);
3934 sv_setpvs(PL_bodytarget, "");
3935 PL_formtarget = PL_bodytarget;
3939 init_argv_symbols(argc,argv);
3941 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3942 sv_setpv(GvSV(tmpgv),PL_origfilename);
3944 GV * const gv = gv_fetchpv("0", GV_ADD, SVt_PV);
3946 sv_magic(GvSV(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, "0", 1);
3949 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3951 bool env_is_not_environ;
3952 GvMULTI_on(PL_envgv);
3953 hv = GvHVn(PL_envgv);
3954 hv_magic(hv, NULL, PERL_MAGIC_env);
3956 #ifdef USE_ENVIRON_ARRAY
3957 /* Note that if the supplied env parameter is actually a copy
3958 of the global environ then it may now point to free'd memory
3959 if the environment has been modified since. To avoid this
3960 problem we treat env==NULL as meaning 'use the default'
3964 env_is_not_environ = env != environ;
3965 if (env_is_not_environ
3966 # ifdef USE_ITHREADS
3967 && PL_curinterp == aTHX
3976 for (; *env; env++) {
3979 if (!(s = strchr(old_var,'=')) || s == old_var)
3982 #if defined(MSDOS) && !defined(DJGPP)
3984 (void)strupr(old_var);
3987 sv = newSVpv(s+1, 0);
3988 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3989 if (env_is_not_environ)
3993 #endif /* USE_ENVIRON_ARRAY */
3994 #endif /* !PERL_MICRO */
3997 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3998 SvREADONLY_off(GvSV(tmpgv));
3999 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4000 SvREADONLY_on(GvSV(tmpgv));
4002 #ifdef THREADS_HAVE_PIDS
4003 PL_ppid = (IV)getppid();
4006 /* touch @F array to prevent spurious warnings 20020415 MJD */
4008 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4013 S_init_perllib(pTHX)
4017 const char *perl5lib = NULL;
4026 perl5lib = PerlEnv_getenv("PERL5LIB");
4028 * It isn't possible to delete an environment variable with
4029 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4030 * case we treat PERL5LIB as undefined if it has a zero-length value.
4032 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4033 if (perl5lib && *perl5lib != '\0')
4037 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4039 s = PerlEnv_getenv("PERLLIB");
4041 incpush_use_sep(s, 0, 0);
4044 /* Treat PERL5?LIB as a possible search list logical name -- the
4045 * "natural" VMS idiom for a Unix path string. We allow each
4046 * element to be a set of |-separated directories for compatibility.
4050 if (my_trnlnm("PERL5LIB",buf,0))
4052 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4053 } while (my_trnlnm("PERL5LIB",buf,++idx));
4055 while (my_trnlnm("PERLLIB",buf,idx++))
4056 incpush_use_sep(buf, 0, 0);
4061 /* Use the ~-expanded versions of APPLLIB (undocumented),
4062 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4065 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4066 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4070 /* sitearch is always relative to sitelib on Windows for
4071 * DLL-based path intuition to work correctly */
4072 # if !defined(WIN32)
4073 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4074 INCPUSH_CAN_RELOCATE);
4080 /* this picks up sitearch as well */
4081 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4083 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4085 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4089 #ifdef PERL_VENDORARCH_EXP
4090 /* vendorarch is always relative to vendorlib on Windows for
4091 * DLL-based path intuition to work correctly */
4092 # if !defined(WIN32)
4093 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4094 INCPUSH_CAN_RELOCATE);
4098 #ifdef PERL_VENDORLIB_EXP
4100 /* this picks up vendorarch as well */
4101 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4103 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4105 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4106 INCPUSH_CAN_RELOCATE);
4111 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4115 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4119 s = win32_get_privlib(PERL_FS_VERSION, &len);
4121 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4124 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4126 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4130 #ifdef PERL_OTHERLIBDIRS
4131 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4132 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4133 |INCPUSH_CAN_RELOCATE);
4139 * It isn't possible to delete an environment variable with
4140 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4141 * case we treat PERL5LIB as undefined if it has a zero-length value.
4143 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4144 if (perl5lib && *perl5lib != '\0')
4148 incpush_use_sep(perl5lib, 0,
4149 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4151 /* Treat PERL5?LIB as a possible search list logical name -- the
4152 * "natural" VMS idiom for a Unix path string. We allow each
4153 * element to be a set of |-separated directories for compatibility.
4157 if (my_trnlnm("PERL5LIB",buf,0))
4159 incpush_use_sep(buf, 0,
4160 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4161 } while (my_trnlnm("PERL5LIB",buf,++idx));
4165 /* Use the ~-expanded versions of APPLLIB (undocumented),
4166 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4169 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4170 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4173 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4174 /* Search for version-specific dirs below here */
4175 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4176 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4180 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4181 /* Search for version-specific dirs below here */
4182 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4183 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4186 #ifdef PERL_OTHERLIBDIRS
4187 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4188 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4189 |INCPUSH_CAN_RELOCATE);
4193 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4196 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4197 # define PERLLIB_SEP ';'
4200 # define PERLLIB_SEP '|'
4202 # define PERLLIB_SEP ':'
4205 #ifndef PERLLIB_MANGLE
4206 # define PERLLIB_MANGLE(s,n) (s)
4209 /* Push a directory onto @INC if it exists.
4210 Generate a new SV if we do this, to save needing to copy the SV we push
4213 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4218 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4220 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4221 S_ISDIR(tmpstatbuf.st_mode)) {
4223 dir = newSVsv(stem);
4225 /* Truncate dir back to stem. */
4226 SvCUR_set(dir, SvCUR(stem));
4232 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4235 const U8 using_sub_dirs
4236 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4237 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4238 const U8 add_versioned_sub_dirs
4239 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4240 const U8 add_archonly_sub_dirs
4241 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4242 #ifdef PERL_INC_VERSION_LIST
4243 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4245 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4246 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4247 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4248 AV *const inc = GvAVn(PL_incgv);
4250 PERL_ARGS_ASSERT_INCPUSH;
4253 /* Could remove this vestigial extra block, if we don't mind a lot of
4254 re-indenting diff noise. */
4257 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4258 arranged to unshift #! line -I onto the front of @INC. However,
4259 -I can add version and architecture specific libraries, and they
4260 need to go first. The old code assumed that it was always
4261 pushing. Hence to make it work, need to push the architecture
4262 (etc) libraries onto a temporary array, then "unshift" that onto
4263 the front of @INC. */
4264 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4267 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4268 defined to so something (in os2/os2.c), but the code has been
4269 this way, ignoring any possible changed of length, since
4270 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4272 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4274 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4277 /* Do the if() outside the #ifdef to avoid warnings about an unused
4280 #ifdef PERL_RELOCATABLE_INC
4282 * Relocatable include entries are marked with a leading .../
4285 * 0: Remove that leading ".../"
4286 * 1: Remove trailing executable name (anything after the last '/')
4287 * from the perl path to give a perl prefix
4289 * While the @INC element starts "../" and the prefix ends with a real
4290 * directory (ie not . or ..) chop that real directory off the prefix
4291 * and the leading "../" from the @INC element. ie a logical "../"
4293 * Finally concatenate the prefix and the remainder of the @INC element
4294 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4295 * generates /usr/local/lib/perl5
4297 const char *libpath = SvPVX(libdir);
4298 STRLEN libpath_len = SvCUR(libdir);
4299 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4301 SV * const caret_X = get_sv("\030", 0);
4302 /* Going to use the SV just as a scratch buffer holding a C
4308 /* $^X is *the* source of taint if tainting is on, hence
4309 SvPOK() won't be true. */
4311 assert(SvPOKp(caret_X));
4312 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4314 /* Firstly take off the leading .../
4315 If all else fail we'll do the paths relative to the current
4317 sv_chop(libdir, libpath + 4);
4318 /* Don't use SvPV as we're intentionally bypassing taining,
4319 mortal copies that the mg_get of tainting creates, and
4320 corruption that seems to come via the save stack.
4321 I guess that the save stack isn't correctly set up yet. */
4322 libpath = SvPVX(libdir);
4323 libpath_len = SvCUR(libdir);
4325 /* This would work more efficiently with memrchr, but as it's
4326 only a GNU extension we'd need to probe for it and
4327 implement our own. Not hard, but maybe not worth it? */
4329 prefix = SvPVX(prefix_sv);
4330 lastslash = strrchr(prefix, '/');
4332 /* First time in with the *lastslash = '\0' we just wipe off
4333 the trailing /perl from (say) /usr/foo/bin/perl
4337 while ((*lastslash = '\0'), /* Do that, come what may. */
4338 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4339 && (lastslash = strrchr(prefix, '/')))) {
4340 if (lastslash[1] == '\0'
4341 || (lastslash[1] == '.'
4342 && (lastslash[2] == '/' /* ends "/." */
4343 || (lastslash[2] == '/'
4344 && lastslash[3] == '/' /* or "/.." */
4346 /* Prefix ends "/" or "/." or "/..", any of which
4347 are fishy, so don't do any more logical cleanup.
4351 /* Remove leading "../" from path */
4354 /* Next iteration round the loop removes the last
4355 directory name from prefix by writing a '\0' in
4356 the while clause. */
4358 /* prefix has been terminated with a '\0' to the correct
4359 length. libpath points somewhere into the libdir SV.
4360 We need to join the 2 with '/' and drop the result into
4362 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4363 SvREFCNT_dec(libdir);
4364 /* And this is the new libdir. */
4367 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4368 /* Need to taint reloccated paths if running set ID */
4369 SvTAINTED_on(libdir);
4372 SvREFCNT_dec(prefix_sv);
4377 * BEFORE pushing libdir onto @INC we may first push version- and
4378 * archname-specific sub-directories.
4380 if (using_sub_dirs) {
4382 #ifdef PERL_INC_VERSION_LIST
4383 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4384 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4385 const char * const *incver;
4392 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4394 while (unix[len-1] == '/') len--; /* Cosmetic */
4395 sv_usepvn(libdir,unix,len);
4398 PerlIO_printf(Perl_error_log,
4399 "Failed to unixify @INC element \"%s\"\n",
4403 subdir = newSVsv(libdir);
4405 if (add_versioned_sub_dirs) {
4406 /* .../version/archname if -d .../version/archname */
4407 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4408 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4410 /* .../version if -d .../version */
4411 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4412 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4415 #ifdef PERL_INC_VERSION_LIST
4417 for (incver = incverlist; *incver; incver++) {
4418 /* .../xxx if -d .../xxx */
4419 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4420 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4425 if (add_archonly_sub_dirs) {
4426 /* .../archname if -d .../archname */
4427 sv_catpvs(subdir, "/" ARCHNAME);
4428 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4432 assert (SvREFCNT(subdir) == 1);
4433 SvREFCNT_dec(subdir);
4436 /* finally add this lib directory at the end of @INC */
4438 U32 extra = av_len(av) + 1;
4439 av_unshift(inc, extra + push_basedir);
4441 av_store(inc, extra, libdir);
4443 /* av owns a reference, av_store() expects to be donated a
4444 reference, and av expects to be sane when it's cleared.
4445 If I wanted to be naughty and wrong, I could peek inside the
4446 implementation of av_clear(), realise that it uses
4447 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4448 and so directly steal from it (with a memcpy() to inc, and
4449 then memset() to NULL them out. But people copy code from the
4450 core expecting it to be best practise, so let's use the API.
4451 Although studious readers will note that I'm not checking any
4453 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4457 else if (push_basedir) {
4458 av_push(inc, libdir);
4461 if (!push_basedir) {
4462 assert (SvREFCNT(libdir) == 1);
4463 SvREFCNT_dec(libdir);
4469 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4473 /* This logic has been broken out from S_incpush(). It may be possible to
4476 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4483 /* Break at all separators */
4484 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4486 /* skip any consecutive separators */
4488 /* Uncomment the next line for PATH semantics */
4489 /* But you'll need to write tests */
4490 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4492 incpush(p, (STRLEN)(s - p), flags);
4497 incpush(p, (STRLEN)(end - p), flags);
4502 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4506 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4512 PERL_ARGS_ASSERT_CALL_LIST;
4514 while (av_len(paramList) >= 0) {
4515 cv = MUTABLE_CV(av_shift(paramList));
4517 if (paramList == PL_beginav) {
4518 /* save PL_beginav for compiler */
4519 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4521 else if (paramList == PL_checkav) {
4522 /* save PL_checkav for compiler */
4523 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4525 else if (paramList == PL_unitcheckav) {
4526 /* save PL_unitcheckav for compiler */
4527 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4538 PL_madskills |= 16384;
4543 PL_madskills &= ~16384;
4546 (void)SvPV_const(atsv, len);
4548 PL_curcop = &PL_compiling;
4549 CopLINE_set(PL_curcop, oldline);
4550 if (paramList == PL_beginav)
4551 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4553 Perl_sv_catpvf(aTHX_ atsv,
4554 "%s failed--call queue aborted",
4555 paramList == PL_checkav ? "CHECK"
4556 : paramList == PL_initav ? "INIT"
4557 : paramList == PL_unitcheckav ? "UNITCHECK"
4559 while (PL_scopestack_ix > oldscope)
4562 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4569 /* my_exit() was called */
4570 while (PL_scopestack_ix > oldscope)
4573 PL_curstash = PL_defstash;
4574 PL_curcop = &PL_compiling;
4575 CopLINE_set(PL_curcop, oldline);
4577 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4578 if (paramList == PL_beginav)
4579 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4581 Perl_croak(aTHX_ "%s failed--call queue aborted",
4582 paramList == PL_checkav ? "CHECK"
4583 : paramList == PL_initav ? "INIT"
4584 : paramList == PL_unitcheckav ? "UNITCHECK"
4591 PL_curcop = &PL_compiling;
4592 CopLINE_set(PL_curcop, oldline);
4595 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4604 Perl_my_exit(pTHX_ U32 status)
4615 STATUS_EXIT_SET(status);
4622 Perl_my_failure_exit(pTHX)
4626 /* We have been called to fall on our sword. The desired exit code
4627 * should be already set in STATUS_UNIX, but could be shifted over
4628 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4631 * If an error code has not been set, then force the issue.
4633 if (MY_POSIX_EXIT) {
4635 /* According to the die_exit.t tests, if errno is non-zero */
4636 /* It should be used for the error status. */
4638 if (errno == EVMSERR) {
4639 STATUS_NATIVE = vaxc$errno;
4642 /* According to die_exit.t tests, if the child_exit code is */
4643 /* also zero, then we need to exit with a code of 255 */
4644 if ((errno != 0) && (errno < 256))
4645 STATUS_UNIX_EXIT_SET(errno);
4646 else if (STATUS_UNIX < 255) {
4647 STATUS_UNIX_EXIT_SET(255);
4652 /* The exit code could have been set by $? or vmsish which
4653 * means that it may not have fatal set. So convert
4654 * success/warning codes to fatal with out changing
4655 * the POSIX status code. The severity makes VMS native
4656 * status handling work, while UNIX mode programs use the
4657 * the POSIX exit codes.
4659 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4660 STATUS_NATIVE &= STS$M_COND_ID;
4661 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4665 /* Traditionally Perl on VMS always expects a Fatal Error. */
4666 if (vaxc$errno & 1) {
4668 /* So force success status to failure */
4669 if (STATUS_NATIVE & 1)
4674 STATUS_UNIX = EINTR; /* In case something cares */
4679 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4681 /* Encode the severity code */
4682 severity = STATUS_NATIVE & STS$M_SEVERITY;
4683 STATUS_UNIX = (severity ? severity : 1) << 8;
4685 /* Perl expects this to be a fatal error */
4686 if (severity != STS$K_SEVERE)
4695 STATUS_UNIX_SET(errno);
4697 exitstatus = STATUS_UNIX >> 8;
4698 if (exitstatus & 255)
4699 STATUS_UNIX_SET(exitstatus);
4701 STATUS_UNIX_SET(255);
4708 S_my_exit_jump(pTHX)
4713 SvREFCNT_dec(PL_e_script);
4717 POPSTACK_TO(PL_mainstack);
4725 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4728 const char * const p = SvPVX_const(PL_e_script);
4729 const char *nl = strchr(p, '\n');
4731 PERL_UNUSED_ARG(idx);
4732 PERL_UNUSED_ARG(maxlen);
4734 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4736 filter_del(read_e_script);
4739 sv_catpvn(buf_sv, p, nl-p);
4740 sv_chop(PL_e_script, nl);
4746 * c-indentation-style: bsd
4748 * indent-tabs-mode: t
4751 * ex: set ts=8 sts=4 sw=4 noet: