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_ascii);
989 SvREFCNT_dec(PL_utf8_alpha);
990 SvREFCNT_dec(PL_utf8_space);
991 SvREFCNT_dec(PL_utf8_cntrl);
992 SvREFCNT_dec(PL_utf8_graph);
993 SvREFCNT_dec(PL_utf8_digit);
994 SvREFCNT_dec(PL_utf8_upper);
995 SvREFCNT_dec(PL_utf8_lower);
996 SvREFCNT_dec(PL_utf8_print);
997 SvREFCNT_dec(PL_utf8_punct);
998 SvREFCNT_dec(PL_utf8_xdigit);
999 SvREFCNT_dec(PL_utf8_mark);
1000 SvREFCNT_dec(PL_utf8_toupper);
1001 SvREFCNT_dec(PL_utf8_totitle);
1002 SvREFCNT_dec(PL_utf8_tolower);
1003 SvREFCNT_dec(PL_utf8_tofold);
1004 SvREFCNT_dec(PL_utf8_idstart);
1005 SvREFCNT_dec(PL_utf8_idcont);
1006 PL_utf8_alnum = NULL;
1007 PL_utf8_ascii = NULL;
1008 PL_utf8_alpha = NULL;
1009 PL_utf8_space = NULL;
1010 PL_utf8_cntrl = NULL;
1011 PL_utf8_graph = NULL;
1012 PL_utf8_digit = NULL;
1013 PL_utf8_upper = NULL;
1014 PL_utf8_lower = NULL;
1015 PL_utf8_print = NULL;
1016 PL_utf8_punct = NULL;
1017 PL_utf8_xdigit = NULL;
1018 PL_utf8_mark = NULL;
1019 PL_utf8_toupper = NULL;
1020 PL_utf8_totitle = NULL;
1021 PL_utf8_tolower = NULL;
1022 PL_utf8_tofold = NULL;
1023 PL_utf8_idstart = NULL;
1024 PL_utf8_idcont = NULL;
1026 if (!specialWARN(PL_compiling.cop_warnings))
1027 PerlMemShared_free(PL_compiling.cop_warnings);
1028 PL_compiling.cop_warnings = NULL;
1029 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1030 PL_compiling.cop_hints_hash = NULL;
1031 CopFILE_free(&PL_compiling);
1032 CopSTASH_free(&PL_compiling);
1034 /* Prepare to destruct main symbol table. */
1039 SvREFCNT_dec(PL_curstname);
1040 PL_curstname = NULL;
1042 /* clear queued errors */
1043 SvREFCNT_dec(PL_errors);
1046 SvREFCNT_dec(PL_isarev);
1049 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1050 if (PL_scopestack_ix != 0)
1051 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1052 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1053 (long)PL_scopestack_ix);
1054 if (PL_savestack_ix != 0)
1055 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1056 "Unbalanced saves: %ld more saves than restores\n",
1057 (long)PL_savestack_ix);
1058 if (PL_tmps_floor != -1)
1059 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1060 (long)PL_tmps_floor + 1);
1061 if (cxstack_ix != -1)
1062 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1063 (long)cxstack_ix + 1);
1066 /* Now absolutely destruct everything, somehow or other, loops or no. */
1068 /* the 2 is for PL_fdpid and PL_strtab */
1069 while (sv_clean_all() > 2)
1072 AvREAL_off(PL_fdpid); /* no surviving entries */
1073 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1076 #ifdef HAVE_INTERP_INTERN
1080 /* Destruct the global string table. */
1082 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1083 * so that sv_free() won't fail on them.
1084 * Now that the global string table is using a single hunk of memory
1085 * for both HE and HEK, we either need to explicitly unshare it the
1086 * correct way, or actually free things here.
1089 const I32 max = HvMAX(PL_strtab);
1090 HE * const * const array = HvARRAY(PL_strtab);
1091 HE *hent = array[0];
1094 if (hent && ckWARN_d(WARN_INTERNAL)) {
1095 HE * const next = HeNEXT(hent);
1096 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1097 "Unbalanced string table refcount: (%ld) for \"%s\"",
1098 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1105 hent = array[riter];
1110 HvARRAY(PL_strtab) = 0;
1111 HvTOTALKEYS(PL_strtab) = 0;
1112 HvFILL(PL_strtab) = 0;
1114 SvREFCNT_dec(PL_strtab);
1117 /* free the pointer tables used for cloning */
1118 ptr_table_free(PL_ptr_table);
1119 PL_ptr_table = (PTR_TBL_t*)NULL;
1122 /* free special SVs */
1124 SvREFCNT(&PL_sv_yes) = 0;
1125 sv_clear(&PL_sv_yes);
1126 SvANY(&PL_sv_yes) = NULL;
1127 SvFLAGS(&PL_sv_yes) = 0;
1129 SvREFCNT(&PL_sv_no) = 0;
1130 sv_clear(&PL_sv_no);
1131 SvANY(&PL_sv_no) = NULL;
1132 SvFLAGS(&PL_sv_no) = 0;
1136 for (i=0; i<=2; i++) {
1137 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1138 sv_clear(PERL_DEBUG_PAD(i));
1139 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1140 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1144 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1145 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1147 #ifdef DEBUG_LEAKING_SCALARS
1148 if (PL_sv_count != 0) {
1153 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1154 svend = &sva[SvREFCNT(sva)];
1155 for (sv = sva + 1; sv < svend; ++sv) {
1156 if (SvTYPE(sv) != SVTYPEMASK) {
1157 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1159 " refcnt=%"UVuf pTHX__FORMAT "\n"
1160 "\tallocated at %s:%d %s %s%s\n",
1161 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1163 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1165 sv->sv_debug_inpad ? "for" : "by",
1166 sv->sv_debug_optype ?
1167 PL_op_name[sv->sv_debug_optype]: "(none)",
1168 sv->sv_debug_cloned ? " (cloned)" : ""
1170 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1171 Perl_dump_sv_child(aTHX_ sv);
1177 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1181 /* Wait for up to 4 seconds for child to terminate.
1182 This seems to be the least effort way of timing out on reaping
1184 struct timeval waitfor = {4, 0};
1185 int sock = PL_dumper_fd;
1189 FD_SET(sock, &rset);
1190 select(sock + 1, &rset, NULL, NULL, &waitfor);
1191 waitpid(child, &status, WNOHANG);
1196 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1202 #ifdef PERL_DEBUG_READONLY_OPS
1208 #if defined(PERLIO_LAYERS)
1209 /* No more IO - including error messages ! */
1210 PerlIO_cleanup(aTHX);
1213 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1214 as currently layers use it rather than NULL as a marker
1215 for no arg - and will try and SvREFCNT_dec it.
1217 SvREFCNT(&PL_sv_undef) = 0;
1218 SvREADONLY_off(&PL_sv_undef);
1220 Safefree(PL_origfilename);
1221 PL_origfilename = NULL;
1222 Safefree(PL_reg_start_tmp);
1223 PL_reg_start_tmp = (char**)NULL;
1224 PL_reg_start_tmpl = 0;
1225 Safefree(PL_reg_curpm);
1226 Safefree(PL_reg_poscache);
1227 free_tied_hv_pool();
1228 Safefree(PL_op_mask);
1229 Safefree(PL_psig_name);
1230 PL_psig_name = (SV**)NULL;
1231 PL_psig_ptr = (SV**)NULL;
1232 Safefree(PL_psig_pend);
1233 PL_psig_pend = (int*)NULL;
1235 /* We need to NULL PL_psig_pend first, so that
1236 signal handlers know not to use it */
1237 int *psig_save = PL_psig_pend;
1238 PL_psig_pend = (int*)NULL;
1239 Safefree(psig_save);
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_DISABLE_PMC
1774 # ifdef PERL_DONT_CREATE_GVSV
1775 " PERL_DONT_CREATE_GVSV"
1777 # ifdef PERL_MALLOC_WRAP
1780 # ifdef PERL_MEM_LOG
1783 # ifdef PERL_MEM_LOG_NOIMPL
1784 " PERL_MEM_LOG_NOIMPL"
1786 # ifdef PERL_USE_DEVEL
1789 # ifdef PERL_USE_SAFE_PUTENV
1790 " PERL_USE_SAFE_PUTENV"
1792 # ifdef USE_SITECUSTOMIZE
1793 " USE_SITECUSTOMIZE"
1795 # ifdef USE_FAST_STDIO
1800 sv_catpv(opts_prog, PL_bincompat_options);
1801 /* Terminate the qw(, and then wrap at 76 columns. */
1802 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1804 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1806 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1808 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1810 #if defined(LOCAL_PATCH_COUNT)
1811 if (LOCAL_PATCH_COUNT > 0) {
1813 sv_catpvs(opts_prog,
1814 "\" Locally applied patches:\\n\",");
1815 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1816 if (PL_localpatches[i])
1817 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1818 0, PL_localpatches[i], 0);
1822 Perl_sv_catpvf(aTHX_ opts_prog,
1823 "\" Built under %s\\n",OSNAME);
1826 sv_catpvs(opts_prog,
1827 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1829 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1832 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1833 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1834 "sort grep {/^PERL/} keys %ENV; ");
1836 sv_catpvs(opts_prog,
1837 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1839 sv_catpvs(opts_prog,
1840 "print \" \\%ENV:\\n @env\\n\" if @env;"
1841 "print \" \\@INC:\\n @INC\\n\";");
1845 opts_prog = Perl_newSVpvf(aTHX_
1846 "Config::config_vars(qw%c%s%c)",
1850 av_push(PL_preambleav, opts_prog);
1851 /* don't look for script or read stdin */
1852 scriptname = BIT_BUCKET;
1856 PL_doextract = TRUE;
1864 if (!*++s || isSPACE(*s)) {
1868 /* catch use of gnu style long options */
1869 if (strEQ(s, "version")) {
1873 if (strEQ(s, "help")) {
1880 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1891 #ifndef SECURE_INTERNAL_GETENV
1894 (s = PerlEnv_getenv("PERL5OPT")))
1898 if (*s == '-' && *(s+1) == 'T') {
1899 CHECK_MALLOC_TOO_LATE_FOR('T');
1901 PL_taint_warn = FALSE;
1904 char *popt_copy = NULL;
1917 if (!strchr("CDIMUdmtwW", *s))
1918 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1922 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1923 s = popt_copy + (s - d);
1931 if( !PL_tainting ) {
1932 PL_taint_warn = TRUE;
1943 #ifdef USE_SITECUSTOMIZE
1945 /* SITELIB_EXP is a function call on Win32.
1946 The games with local $! are to avoid setting errno if there is no
1947 sitecustomize script. */
1948 const char *const sitelib = SITELIB_EXP;
1949 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1951 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1956 scriptname = argv[0];
1959 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1961 else if (scriptname == NULL) {
1963 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1969 /* Set $^X early so that it can be used for relocatable paths in @INC */
1970 assert (!PL_tainted);
1972 S_set_caret_X(aTHX);
1977 bool suidscript = FALSE;
1979 open_script(scriptname, dosearch, &suidscript, &rsfp);
1981 validate_suid(validarg, scriptname, fdscript, suidscript,
1985 # if defined(SIGCHLD) || defined(SIGCLD)
1988 # define SIGCHLD SIGCLD
1990 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1991 if (sigstate == (Sighandler_t) SIG_IGN) {
1992 if (ckWARN(WARN_SIGNAL))
1993 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1994 "Can't ignore signal CHLD, forcing to default");
1995 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2003 /* This will croak if suidscript is true, as -x cannot be used with
2005 forbid_setid('x', suidscript);
2006 /* Hence you can't get here if suidscript is true */
2008 find_beginning(linestr_sv, rsfp);
2009 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2010 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2014 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2015 CvUNIQUE_on(PL_compcv);
2017 CvPADLIST(PL_compcv) = pad_new(0);
2019 PL_isarev = newHV();
2022 boot_core_UNIVERSAL();
2026 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2028 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2034 # ifdef HAS_SOCKS5_INIT
2035 socks5_init(argv[0]);
2041 init_predump_symbols();
2042 /* init_postdump_symbols not currently designed to be called */
2043 /* more than once (ENV isn't cleared first, for example) */
2044 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2046 init_postdump_symbols(argc,argv,env);
2048 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2049 * or explicitly in some platforms.
2050 * locale.c:Perl_init_i18nl10n() if the environment
2051 * look like the user wants to use UTF-8. */
2052 #if defined(__SYMBIAN32__)
2053 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2056 /* Requires init_predump_symbols(). */
2057 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2062 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2063 * and the default open disciplines. */
2064 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2065 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2067 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2068 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2069 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2071 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2072 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2073 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2075 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2076 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2077 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2079 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2080 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2083 sv_setpvs(sv, ":utf8\0:utf8");
2085 sv_setpvs(sv, ":utf8\0");
2088 sv_setpvs(sv, "\0:utf8");
2096 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2097 if (strEQ(s, "unsafe"))
2098 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2099 else if (strEQ(s, "safe"))
2100 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2102 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2109 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2113 PL_xmlfp = PerlIO_stdout();
2115 PL_xmlfp = PerlIO_open(s, "w");
2117 Perl_croak(aTHX_ "Can't open %s", s);
2119 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2125 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2126 PL_madskills = atoi(s);
2127 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2132 lex_start(linestr_sv, rsfp, TRUE);
2133 PL_subname = newSVpvs("main");
2135 if (add_read_e_script)
2136 filter_add(read_e_script, NULL);
2138 /* now parse the script */
2140 SETERRNO(0,SS_NORMAL);
2141 if (yyparse() || PL_parser->error_count) {
2143 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2145 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2149 CopLINE_set(PL_curcop, 0);
2150 PL_curstash = PL_defstash;
2152 SvREFCNT_dec(PL_e_script);
2160 SAVECOPFILE(PL_curcop);
2161 SAVECOPLINE(PL_curcop);
2162 gv_check(PL_defstash);
2171 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2172 dump_mstats("after compilation:");
2182 =for apidoc perl_run
2184 Tells a Perl interpreter to run. See L<perlembed>.
2197 PERL_ARGS_ASSERT_PERL_RUN;
2198 #ifndef MULTIPLICITY
2199 PERL_UNUSED_ARG(my_perl);
2202 oldscope = PL_scopestack_ix;
2210 cxstack_ix = -1; /* start context stack again */
2212 case 0: /* normal completion */
2216 case 2: /* my_exit() */
2217 while (PL_scopestack_ix > oldscope)
2220 PL_curstash = PL_defstash;
2221 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2222 PL_endav && !PL_minus_c)
2223 call_list(oldscope, PL_endav);
2225 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2226 dump_mstats("after execution: ");
2232 POPSTACK_TO(PL_mainstack);
2235 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2246 S_run_body(pTHX_ I32 oldscope)
2249 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2250 PL_sawampersand ? "Enabling" : "Omitting"));
2252 if (!PL_restartop) {
2256 exit(0); /* less likely to core dump than my_exit(0) */
2260 if (DEBUG_x_TEST || DEBUG_B_TEST)
2261 dump_all_perl(!DEBUG_B_TEST);
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 */
2492 PERL_ARGS_ASSERT_CALL_METHOD;
2494 len = strlen(methname);
2496 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2497 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2500 /* May be called with any of a CV, a GV, or an SV containing the name. */
2502 =for apidoc p||call_sv
2504 Performs a callback to the Perl sub whose name is in the SV. See
2511 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2512 /* See G_* flags in cop.h */
2515 LOGOP myop; /* fake syntax tree node */
2520 bool oldcatch = CATCH_GET;
2522 OP* const oldop = PL_op;
2525 PERL_ARGS_ASSERT_CALL_SV;
2527 if (flags & G_DISCARD) {
2531 if (!(flags & G_WANT)) {
2532 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2537 Zero(&myop, 1, LOGOP);
2538 myop.op_next = NULL;
2539 if (!(flags & G_NOARGS))
2540 myop.op_flags |= OPf_STACKED;
2541 myop.op_flags |= OP_GIMME_REVERSE(flags);
2545 EXTEND(PL_stack_sp, 1);
2546 *++PL_stack_sp = sv;
2548 oldscope = PL_scopestack_ix;
2550 if (PERLDB_SUB && PL_curstash != PL_debstash
2551 /* Handle first BEGIN of -d. */
2552 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2553 /* Try harder, since this may have been a sighandler, thus
2554 * curstash may be meaningless. */
2555 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2556 && !(flags & G_NODEBUG))
2557 PL_op->op_private |= OPpENTERSUB_DB;
2559 if (flags & G_METHOD) {
2560 Zero(&method_op, 1, UNOP);
2561 method_op.op_next = PL_op;
2562 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2563 method_op.op_type = OP_METHOD;
2564 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2565 myop.op_type = OP_ENTERSUB;
2566 PL_op = (OP*)&method_op;
2569 if (!(flags & G_EVAL)) {
2571 CALL_BODY_SUB((OP*)&myop);
2572 retval = PL_stack_sp - (PL_stack_base + oldmark);
2573 CATCH_SET(oldcatch);
2576 myop.op_other = (OP*)&myop;
2578 create_eval_scope(flags|G_FAKINGEVAL);
2586 CALL_BODY_SUB((OP*)&myop);
2587 retval = PL_stack_sp - (PL_stack_base + oldmark);
2588 if (!(flags & G_KEEPERR)) {
2596 /* my_exit() was called */
2597 PL_curstash = PL_defstash;
2600 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2601 Perl_croak(aTHX_ "Callback called exit");
2606 PL_op = PL_restartop;
2610 PL_stack_sp = PL_stack_base + oldmark;
2611 if ((flags & G_WANT) == G_ARRAY)
2615 *++PL_stack_sp = &PL_sv_undef;
2620 if (PL_scopestack_ix > oldscope)
2621 delete_eval_scope();
2625 if (flags & G_DISCARD) {
2626 PL_stack_sp = PL_stack_base + oldmark;
2635 /* Eval a string. The G_EVAL flag is always assumed. */
2638 =for apidoc p||eval_sv
2640 Tells Perl to C<eval> the string in the SV.
2646 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2648 /* See G_* flags in cop.h */
2652 UNOP myop; /* fake syntax tree node */
2653 VOL I32 oldmark = SP - PL_stack_base;
2656 OP* const oldop = PL_op;
2659 PERL_ARGS_ASSERT_EVAL_SV;
2661 if (flags & G_DISCARD) {
2668 Zero(PL_op, 1, UNOP);
2669 EXTEND(PL_stack_sp, 1);
2670 *++PL_stack_sp = sv;
2672 if (!(flags & G_NOARGS))
2673 myop.op_flags = OPf_STACKED;
2674 myop.op_next = NULL;
2675 myop.op_type = OP_ENTEREVAL;
2676 myop.op_flags |= OP_GIMME_REVERSE(flags);
2677 if (flags & G_KEEPERR)
2678 myop.op_flags |= OPf_SPECIAL;
2680 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2681 * before a PUSHEVAL, which corrupts the stack after a croak */
2682 TAINT_PROPER("eval_sv()");
2688 CALL_BODY_EVAL((OP*)&myop);
2689 retval = PL_stack_sp - (PL_stack_base + oldmark);
2690 if (!(flags & G_KEEPERR)) {
2698 /* my_exit() was called */
2699 PL_curstash = PL_defstash;
2702 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2703 Perl_croak(aTHX_ "Callback called exit");
2708 PL_op = PL_restartop;
2712 PL_stack_sp = PL_stack_base + oldmark;
2713 if ((flags & G_WANT) == G_ARRAY)
2717 *++PL_stack_sp = &PL_sv_undef;
2723 if (flags & G_DISCARD) {
2724 PL_stack_sp = PL_stack_base + oldmark;
2734 =for apidoc p||eval_pv
2736 Tells Perl to C<eval> the given string and return an SV* result.
2742 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2746 SV* sv = newSVpv(p, 0);
2748 PERL_ARGS_ASSERT_EVAL_PV;
2750 eval_sv(sv, G_SCALAR);
2757 if (croak_on_error && SvTRUE(ERRSV)) {
2758 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2764 /* Require a module. */
2767 =head1 Embedding Functions
2769 =for apidoc p||require_pv
2771 Tells Perl to C<require> the file named by the string argument. It is
2772 analogous to the Perl code C<eval "require '$file'">. It's even
2773 implemented that way; consider using load_module instead.
2778 Perl_require_pv(pTHX_ const char *pv)
2784 PERL_ARGS_ASSERT_REQUIRE_PV;
2786 PUSHSTACKi(PERLSI_REQUIRE);
2788 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2789 eval_sv(sv_2mortal(sv), G_DISCARD);
2795 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2797 /* This message really ought to be max 23 lines.
2798 * Removed -h because the user already knows that option. Others? */
2800 static const char * const usage_msg[] = {
2801 "-0[octal] specify record separator (\\0, if no argument)",
2802 "-a autosplit mode with -n or -p (splits $_ into @F)",
2803 "-C[number/list] enables the listed Unicode features",
2804 "-c check syntax only (runs BEGIN and CHECK blocks)",
2805 "-d[:debugger] run program under debugger",
2806 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2807 "-e program one line of program (several -e's allowed, omit programfile)",
2808 "-E program like -e, but enables all optional features",
2809 "-f don't do $sitelib/sitecustomize.pl at startup",
2810 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2811 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2812 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2813 "-l[octal] enable line ending processing, specifies line terminator",
2814 "-[mM][-]module execute \"use/no module...\" before executing program",
2815 "-n assume \"while (<>) { ... }\" loop around program",
2816 "-p assume loop like -n but print line also, like sed",
2817 "-s enable rudimentary parsing for switches after programfile",
2818 "-S look for programfile using PATH environment variable",
2819 "-t enable tainting warnings",
2820 "-T enable tainting checks",
2821 "-u dump core after parsing program",
2822 "-U allow unsafe operations",
2823 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2824 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2825 "-w enable many useful warnings (RECOMMENDED)",
2826 "-W enable all warnings",
2827 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2828 "-X disable all warnings",
2832 const char * const *p = usage_msg;
2834 PERL_ARGS_ASSERT_USAGE;
2836 PerlIO_printf(PerlIO_stdout(),
2837 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2840 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2843 /* convert a string of -D options (or digits) into an int.
2844 * sets *s to point to the char after the options */
2848 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2850 static const char * const usage_msgd[] = {
2851 " Debugging flag values: (see also -d)",
2852 " p Tokenizing and parsing (with v, displays parse stack)",
2853 " s Stack snapshots (with v, displays all stacks)",
2854 " l Context (loop) stack processing",
2855 " t Trace execution",
2856 " o Method and overloading resolution",
2857 " c String/numeric conversions",
2858 " P Print profiling info, source file input state",
2859 " m Memory and SV allocation",
2860 " f Format processing",
2861 " r Regular expression parsing and execution",
2862 " x Syntax tree dump",
2863 " u Tainting checks",
2864 " H Hash dump -- usurps values()",
2865 " X Scratchpad allocation",
2868 " R Include reference counts of dumped variables (eg when using -Ds)",
2869 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2870 " v Verbose: use in conjunction with other flags",
2872 " A Consistency checks on internal structures",
2873 " q quiet - currently only suppresses the 'EXECUTING' message",
2874 " M trace smart match resolution",
2875 " B dump suBroutine definitions, including special Blocks like BEGIN",
2880 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2883 /* if adding extra options, remember to update DEBUG_MASK */
2884 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2886 for (; isALNUM(**s); (*s)++) {
2887 const char * const d = strchr(debopts,**s);
2889 i |= 1 << (d - debopts);
2890 else if (ckWARN_d(WARN_DEBUGGING))
2891 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2892 "invalid option -D%c, use -D'' to see choices\n", **s);
2895 else if (isDIGIT(**s)) {
2897 for (; isALNUM(**s); (*s)++) ;
2899 else if (givehelp) {
2900 const char *const *p = usage_msgd;
2901 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2904 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2905 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2906 "-Dp not implemented on this platform\n");
2912 /* This routine handles any switches that can be given during run */
2915 Perl_moreswitches(pTHX_ const char *s)
2919 const char option = *s; /* used to remember option in -m/-M code */
2921 PERL_ARGS_ASSERT_MORESWITCHES;
2929 SvREFCNT_dec(PL_rs);
2930 if (s[1] == 'x' && s[2]) {
2931 const char *e = s+=2;
2937 flags = PERL_SCAN_SILENT_ILLDIGIT;
2938 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2939 if (s + numlen < e) {
2940 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2944 PL_rs = newSVpvs("");
2945 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2946 tmps = (U8*)SvPVX(PL_rs);
2947 uvchr_to_utf8(tmps, rschar);
2948 SvCUR_set(PL_rs, UNISKIP(rschar));
2953 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2954 if (rschar & ~((U8)~0))
2955 PL_rs = &PL_sv_undef;
2956 else if (!rschar && numlen >= 2)
2957 PL_rs = newSVpvs("");
2959 char ch = (char)rschar;
2960 PL_rs = newSVpvn(&ch, 1);
2963 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2968 PL_unicode = parse_unicode_opts( (const char **)&s );
2969 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2975 while (*s && !isSPACE(*s)) ++s;
2976 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2987 forbid_setid('d', FALSE);
2990 /* -dt indicates to the debugger that threads will be used */
2991 if (*s == 't' && !isALNUM(s[1])) {
2993 my_setenv("PERL5DB_THREADED", "1");
2996 /* The following permits -d:Mod to accepts arguments following an =
2997 in the fashion that -MSome::Mod does. */
2998 if (*s == ':' || *s == '=') {
2999 const char *start = ++s;
3000 const char *const end = s + strlen(s);
3001 SV * const sv = newSVpvs("use Devel::");
3003 /* We now allow -d:Module=Foo,Bar */
3004 while(isALNUM(*s) || *s==':') ++s;
3006 sv_catpvn(sv, start, end - start);
3008 sv_catpvn(sv, start, s-start);
3009 /* Don't use NUL as q// delimiter here, this string goes in the
3011 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3014 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3018 PL_perldb = PERLDB_ALL;
3025 forbid_setid('D', FALSE);
3027 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3028 #else /* !DEBUGGING */
3029 if (ckWARN_d(WARN_DEBUGGING))
3030 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3031 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3032 for (s++; isALNUM(*s); s++) ;
3037 usage(PL_origargv[0]);
3040 Safefree(PL_inplace);
3041 #if defined(__CYGWIN__) /* do backup extension automagically */
3042 if (*(s+1) == '\0') {
3043 PL_inplace = savepvs(".bak");
3046 #endif /* __CYGWIN__ */
3048 const char * const start = ++s;
3049 while (*s && !isSPACE(*s))
3052 PL_inplace = savepvn(start, s - start);
3056 if (*s == '-') /* Additional switches on #! line. */
3060 case 'I': /* -I handled both here and in parse_body() */
3061 forbid_setid('I', FALSE);
3063 while (*s && isSPACE(*s))
3068 /* ignore trailing spaces (possibly followed by other switches) */
3070 for (e = p; *e && !isSPACE(*e); e++) ;
3074 } while (*p && *p != '-');
3076 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3082 Perl_croak(aTHX_ "No directory specified for -I");
3088 SvREFCNT_dec(PL_ors_sv);
3094 PL_ors_sv = newSVpvs("\n");
3095 numlen = 3 + (*s == '0');
3096 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3100 if (RsPARA(PL_rs)) {
3101 PL_ors_sv = newSVpvs("\n\n");
3104 PL_ors_sv = newSVsv(PL_rs);
3109 forbid_setid('M', FALSE); /* XXX ? */
3112 forbid_setid('m', FALSE); /* XXX ? */
3117 const char *use = "use ";
3119 /* -M-foo == 'no foo' */
3120 /* Leading space on " no " is deliberate, to make both
3121 possibilities the same length. */
3122 if (*s == '-') { use = " no "; ++s; }
3123 sv = newSVpvn(use,4);
3125 /* We allow -M'Module qw(Foo Bar)' */
3126 while(isALNUM(*s) || *s==':') {
3135 Perl_croak(aTHX_ "Module name required with -%c option",
3138 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3139 "contains single ':'",
3140 (int)(s - start), start, option);
3141 end = s + strlen(s);
3143 sv_catpvn(sv, start, end - start);
3144 if (option == 'm') {
3146 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3147 sv_catpvs( sv, " ()");
3150 sv_catpvn(sv, start, s-start);
3151 /* Use NUL as q''-delimiter. */
3152 sv_catpvs(sv, " split(/,/,q\0");
3154 sv_catpvn(sv, s, end - s);
3155 sv_catpvs(sv, "\0)");
3158 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3161 Perl_croak(aTHX_ "Missing argument to -%c", option);
3172 forbid_setid('s', FALSE);
3173 PL_doswitches = TRUE;
3187 PL_do_undump = TRUE;
3195 if (!sv_derived_from(PL_patchlevel, "version"))
3196 upg_version(PL_patchlevel, TRUE);
3199 SV* level= vstringify(PL_patchlevel);
3200 #ifdef PERL_PATCHNUM
3201 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3202 SV *num = newSVpvs(PERL_PATCHNUM "*");
3204 SV *num = newSVpvs(PERL_PATCHNUM);
3207 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3208 SvREFCNT_dec(level);
3211 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3215 PerlIO_printf(PerlIO_stdout(),
3216 "\nThis is perl, %"SVf
3220 SvREFCNT_dec(level);
3223 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3224 PerlIO_printf(PerlIO_stdout(),
3225 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3226 SVfARG(vstringify(PL_patchlevel))));
3227 PerlIO_printf(PerlIO_stdout(),
3228 Perl_form(aTHX_ " built under %s at %s %s\n",
3229 OSNAME, __DATE__, __TIME__));
3230 PerlIO_printf(PerlIO_stdout(),
3231 Perl_form(aTHX_ " OS Specific Release: %s\n",
3234 #if defined(LOCAL_PATCH_COUNT)
3235 if (LOCAL_PATCH_COUNT > 0)
3236 PerlIO_printf(PerlIO_stdout(),
3237 "\n(with %d registered patch%s, "
3238 "see perl -V for more detail)",
3240 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3243 PerlIO_printf(PerlIO_stdout(),
3244 "\n\nCopyright 1987-2009, Larry Wall\n");
3246 PerlIO_printf(PerlIO_stdout(),
3247 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3250 PerlIO_printf(PerlIO_stdout(),
3251 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3252 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3255 PerlIO_printf(PerlIO_stdout(),
3256 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3257 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3260 PerlIO_printf(PerlIO_stdout(),
3261 "atariST series port, ++jrb bammi@cadence.com\n");
3264 PerlIO_printf(PerlIO_stdout(),
3265 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3268 PerlIO_printf(PerlIO_stdout(),
3269 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3276 PerlIO_printf(PerlIO_stdout(),
3277 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3288 PerlIO_printf(PerlIO_stdout(),
3289 "EPOC port by Olaf Flebbe, 1999-2002\n");
3292 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3293 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3296 #ifdef __SYMBIAN32__
3297 PerlIO_printf(PerlIO_stdout(),
3298 "Symbian port by Nokia, 2004-2005\n");
3300 #ifdef BINARY_BUILD_NOTICE
3301 BINARY_BUILD_NOTICE;
3303 PerlIO_printf(PerlIO_stdout(),
3305 Perl may be copied only under the terms of either the Artistic License or the\n\
3306 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3307 Complete documentation for Perl, including FAQ lists, should be found on\n\
3308 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3309 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3312 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3313 PL_dowarn |= G_WARN_ON;
3318 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3319 if (!specialWARN(PL_compiling.cop_warnings))
3320 PerlMemShared_free(PL_compiling.cop_warnings);
3321 PL_compiling.cop_warnings = pWARN_ALL ;
3325 PL_dowarn = G_WARN_ALL_OFF;
3326 if (!specialWARN(PL_compiling.cop_warnings))
3327 PerlMemShared_free(PL_compiling.cop_warnings);
3328 PL_compiling.cop_warnings = pWARN_NONE ;
3335 if (s[0] == '-') /* Additional switches on #! line. */
3340 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3346 #ifdef ALTERNATE_SHEBANG
3347 case 'S': /* OS/2 needs -S on "extproc" line. */
3351 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3356 /* compliments of Tom Christiansen */
3358 /* unexec() can be found in the Gnu emacs distribution */
3359 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3362 Perl_my_unexec(pTHX)
3364 PERL_UNUSED_CONTEXT;
3366 SV * prog = newSVpv(BIN_EXP, 0);
3367 SV * file = newSVpv(PL_origfilename, 0);
3371 sv_catpvs(prog, "/perl");
3372 sv_catpvs(file, ".perldump");
3374 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3375 /* unexec prints msg to stderr in case of failure */
3376 PerlProc_exit(status);
3379 # include <lib$routines.h>
3380 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3381 # elif defined(WIN32) || defined(__CYGWIN__)
3382 Perl_croak(aTHX_ "dump is not supported");
3384 ABORT(); /* for use with undump */
3389 /* initialize curinterp */
3395 # define PERLVAR(var,type)
3396 # define PERLVARA(var,n,type)
3397 # if defined(PERL_IMPLICIT_CONTEXT)
3398 # define PERLVARI(var,type,init) aTHX->var = init;
3399 # define PERLVARIC(var,type,init) aTHX->var = init;
3401 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3402 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3404 # include "intrpvar.h"
3410 # define PERLVAR(var,type)
3411 # define PERLVARA(var,n,type)
3412 # define PERLVARI(var,type,init) PL_##var = init;
3413 # define PERLVARIC(var,type,init) PL_##var = init;
3414 # include "intrpvar.h"
3421 /* As these are inside a structure, PERLVARI isn't capable of initialising
3423 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3424 PL_reg_poscache = PL_reg_starttry = NULL;
3428 S_init_main_stash(pTHX)
3433 PL_curstash = PL_defstash = newHV();
3434 /* We know that the string "main" will be in the global shared string
3435 table, so it's a small saving to use it rather than allocate another
3437 PL_curstname = newSVpvs_share("main");
3438 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3439 /* If we hadn't caused another reference to "main" to be in the shared
3440 string table above, then it would be worth reordering these two,
3441 because otherwise all we do is delete "main" from it as a consequence
3442 of the SvREFCNT_dec, only to add it again with hv_name_set */
3443 SvREFCNT_dec(GvHV(gv));
3444 hv_name_set(PL_defstash, "main", 4, 0);
3445 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3447 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3449 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3450 GvMULTI_on(PL_incgv);
3451 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3452 GvMULTI_on(PL_hintgv);
3453 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3454 SvREFCNT_inc_simple_void(PL_defgv);
3455 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3456 SvREFCNT_inc_simple_void(PL_errgv);
3457 GvMULTI_on(PL_errgv);
3458 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3459 GvMULTI_on(PL_replgv);
3460 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3461 #ifdef PERL_DONT_CREATE_GVSV
3464 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3466 PL_curstash = PL_defstash;
3467 CopSTASH_set(&PL_compiling, PL_defstash);
3468 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3469 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3471 /* We must init $/ before switches are processed. */
3472 sv_setpvs(get_sv("/", GV_ADD), "\n");
3476 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3477 bool *suidscript, PerlIO **rsfpp)
3482 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3485 PL_origfilename = savepvs("-e");
3488 /* if find_script() returns, it returns a malloc()-ed value */
3489 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3491 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3492 const char *s = scriptname + 8;
3498 * Tell apart "normal" usage of fdscript, e.g.
3499 * with bash on FreeBSD:
3500 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3501 * from usage in suidperl.
3502 * Does any "normal" usage leave garbage after the number???
3503 * Is it a mistake to use a similar /dev/fd/ construct for
3508 * Be supersafe and do some sanity-checks.
3509 * Still, can we be sure we got the right thing?
3512 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3515 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3517 scriptname = savepv(s + 1);
3518 Safefree(PL_origfilename);
3519 PL_origfilename = (char *)scriptname;
3524 CopFILE_free(PL_curcop);
3525 CopFILE_set(PL_curcop, PL_origfilename);
3526 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3527 scriptname = (char *)"";
3528 if (fdscript >= 0) {
3529 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3530 # if defined(HAS_FCNTL) && defined(F_SETFD)
3532 /* ensure close-on-exec */
3533 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3536 else if (!*scriptname) {
3537 forbid_setid(0, *suidscript);
3538 *rsfpp = PerlIO_stdin();
3541 #ifdef FAKE_BIT_BUCKET
3542 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3543 * is called) and still have the "-e" work. (Believe it or not,
3544 * a /dev/null is required for the "-e" to work because source
3545 * filter magic is used to implement it. ) This is *not* a general
3546 * replacement for a /dev/null. What we do here is create a temp
3547 * file (an empty file), open up that as the script, and then
3548 * immediately close and unlink it. Close enough for jazz. */
3549 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3550 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3551 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3552 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3553 FAKE_BIT_BUCKET_TEMPLATE
3555 const char * const err = "Failed to create a fake bit bucket";
3556 if (strEQ(scriptname, BIT_BUCKET)) {
3557 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3558 int tmpfd = mkstemp(tmpname);
3560 scriptname = tmpname;
3563 Perl_croak(aTHX_ err);
3566 scriptname = mktemp(tmpname);
3568 Perl_croak(aTHX_ err);
3573 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3574 #ifdef FAKE_BIT_BUCKET
3575 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3576 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3577 && strlen(scriptname) == sizeof(tmpname) - 1) {
3580 scriptname = BIT_BUCKET;
3582 # if defined(HAS_FCNTL) && defined(F_SETFD)
3584 /* ensure close-on-exec */
3585 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3589 /* PSz 16 Sep 03 Keep neat error message */
3591 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3593 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3594 CopFILE(PL_curcop), Strerror(errno));
3600 * I_SYSSTATVFS HAS_FSTATVFS
3602 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3603 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3604 * here so that metaconfig picks them up. */
3607 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3608 /* Don't even need this function. */
3611 S_validate_suid(pTHX_ PerlIO *rsfp)
3613 PERL_ARGS_ASSERT_VALIDATE_SUID;
3615 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3618 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3619 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3621 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3624 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3625 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3626 /* not set-id, must be wrapped */
3629 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3632 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3636 register const char *s2;
3638 PERL_ARGS_ASSERT_FIND_BEGINNING;
3640 /* skip forward in input to the real script? */
3642 while (PL_doextract) {
3643 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3644 Perl_croak(aTHX_ "No Perl script found in input\n");
3646 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3647 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3648 PL_doextract = FALSE;
3649 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3651 while (*s == ' ' || *s == '\t') s++;
3653 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3654 || s2[-1] == '_') s2--;
3655 if (strnEQ(s2-4,"perl",4))
3656 while ((s = moreswitches(s)))
3668 PL_uid = PerlProc_getuid();
3669 PL_euid = PerlProc_geteuid();
3670 PL_gid = PerlProc_getgid();
3671 PL_egid = PerlProc_getegid();
3673 PL_uid |= PL_gid << 16;
3674 PL_euid |= PL_egid << 16;
3676 /* Should not happen: */
3677 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3678 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3681 * Should go by suidscript, not uid!=euid: why disallow
3682 * system("ls") in scripts run from setuid things?
3683 * Or, is this run before we check arguments and set suidscript?
3684 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3685 * (We never have suidscript, can we be sure to have fdscript?)
3686 * Or must then go by UID checks? See comments in forbid_setid also.
3690 /* This is used very early in the lifetime of the program,
3691 * before even the options are parsed, so PL_tainting has
3692 * not been initialized properly. */
3694 Perl_doing_taint(int argc, char *argv[], char *envp[])
3696 #ifndef PERL_IMPLICIT_SYS
3697 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3698 * before we have an interpreter-- and the whole point of this
3699 * function is to be called at such an early stage. If you are on
3700 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3701 * "tainted because running with altered effective ids', you'll
3702 * have to add your own checks somewhere in here. The two most
3703 * known samples of 'implicitness' are Win32 and NetWare, neither
3704 * of which has much of concept of 'uids'. */
3705 int uid = PerlProc_getuid();
3706 int euid = PerlProc_geteuid();
3707 int gid = PerlProc_getgid();
3708 int egid = PerlProc_getegid();
3715 if (uid && (euid != uid || egid != gid))
3717 #endif /* !PERL_IMPLICIT_SYS */
3718 /* This is a really primitive check; environment gets ignored only
3719 * if -T are the first chars together; otherwise one gets
3720 * "Too late" message. */
3721 if ( argc > 1 && argv[1][0] == '-'
3722 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3727 /* Passing the flag as a single char rather than a string is a slight space
3728 optimisation. The only message that isn't /^-.$/ is
3729 "program input from stdin", which is substituted in place of '\0', which
3730 could never be a command line flag. */
3732 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3735 char string[3] = "-x";
3736 const char *message = "program input from stdin";
3743 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3744 if (PL_euid != PL_uid)
3745 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3746 if (PL_egid != PL_gid)
3747 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3748 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3750 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3754 Perl_init_debugger(pTHX)
3757 HV * const ostash = PL_curstash;
3759 PL_curstash = PL_debstash;
3760 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3762 AvREAL_off(PL_dbargs);
3763 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3764 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3765 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3766 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3767 sv_setiv(PL_DBsingle, 0);
3768 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3769 sv_setiv(PL_DBtrace, 0);
3770 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3771 sv_setiv(PL_DBsignal, 0);
3772 PL_curstash = ostash;
3775 #ifndef STRESS_REALLOC
3776 #define REASONABLE(size) (size)
3778 #define REASONABLE(size) (1) /* unreasonable */
3782 Perl_init_stacks(pTHX)
3785 /* start with 128-item stack and 8K cxstack */
3786 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3787 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3788 PL_curstackinfo->si_type = PERLSI_MAIN;
3789 PL_curstack = PL_curstackinfo->si_stack;
3790 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3792 PL_stack_base = AvARRAY(PL_curstack);
3793 PL_stack_sp = PL_stack_base;
3794 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3796 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3799 PL_tmps_max = REASONABLE(128);
3801 Newx(PL_markstack,REASONABLE(32),I32);
3802 PL_markstack_ptr = PL_markstack;
3803 PL_markstack_max = PL_markstack + REASONABLE(32);
3807 Newx(PL_scopestack,REASONABLE(32),I32);
3808 PL_scopestack_ix = 0;
3809 PL_scopestack_max = REASONABLE(32);
3811 Newx(PL_savestack,REASONABLE(128),ANY);
3812 PL_savestack_ix = 0;
3813 PL_savestack_max = REASONABLE(128);
3822 while (PL_curstackinfo->si_next)
3823 PL_curstackinfo = PL_curstackinfo->si_next;
3824 while (PL_curstackinfo) {
3825 PERL_SI *p = PL_curstackinfo->si_prev;
3826 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3827 Safefree(PL_curstackinfo->si_cxstack);
3828 Safefree(PL_curstackinfo);
3829 PL_curstackinfo = p;
3831 Safefree(PL_tmps_stack);
3832 Safefree(PL_markstack);
3833 Safefree(PL_scopestack);
3834 Safefree(PL_savestack);
3839 S_init_predump_symbols(pTHX)
3845 sv_setpvs(get_sv("\"", GV_ADD), " ");
3846 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3848 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3849 GvMULTI_on(PL_stdingv);
3850 io = GvIOp(PL_stdingv);
3851 IoTYPE(io) = IoTYPE_RDONLY;
3852 IoIFP(io) = PerlIO_stdin();
3853 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3855 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3857 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3860 IoTYPE(io) = IoTYPE_WRONLY;
3861 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3863 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3865 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3867 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3868 GvMULTI_on(PL_stderrgv);
3869 io = GvIOp(PL_stderrgv);
3870 IoTYPE(io) = IoTYPE_WRONLY;
3871 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3872 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3874 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3876 PL_statname = newSV(0); /* last filename we did stat on */
3878 Safefree(PL_osname);
3879 PL_osname = savepv(OSNAME);
3883 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3887 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3889 argc--,argv++; /* skip name of script */
3890 if (PL_doswitches) {
3891 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3895 if (argv[0][1] == '-' && !argv[0][2]) {
3899 if ((s = strchr(argv[0], '='))) {
3900 const char *const start_name = argv[0] + 1;
3901 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3902 TRUE, SVt_PV)), s + 1);
3905 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3908 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3909 GvMULTI_on(PL_argvgv);
3910 (void)gv_AVadd(PL_argvgv);
3911 av_clear(GvAVn(PL_argvgv));
3912 for (; argc > 0; argc--,argv++) {
3913 SV * const sv = newSVpv(argv[0],0);
3914 av_push(GvAVn(PL_argvgv),sv);
3915 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3916 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3919 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3920 (void)sv_utf8_decode(sv);
3926 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3931 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3933 PL_toptarget = newSV_type(SVt_PVFM);
3934 sv_setpvs(PL_toptarget, "");
3935 PL_bodytarget = newSV_type(SVt_PVFM);
3936 sv_setpvs(PL_bodytarget, "");
3937 PL_formtarget = PL_bodytarget;
3941 init_argv_symbols(argc,argv);
3943 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3944 sv_setpv(GvSV(tmpgv),PL_origfilename);
3946 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3948 bool env_is_not_environ;
3949 GvMULTI_on(PL_envgv);
3950 hv = GvHVn(PL_envgv);
3951 hv_magic(hv, NULL, PERL_MAGIC_env);
3953 #ifdef USE_ENVIRON_ARRAY
3954 /* Note that if the supplied env parameter is actually a copy
3955 of the global environ then it may now point to free'd memory
3956 if the environment has been modified since. To avoid this
3957 problem we treat env==NULL as meaning 'use the default'
3961 env_is_not_environ = env != environ;
3962 if (env_is_not_environ
3963 # ifdef USE_ITHREADS
3964 && PL_curinterp == aTHX
3973 for (; *env; env++) {
3976 if (!(s = strchr(old_var,'=')) || s == old_var)
3979 #if defined(MSDOS) && !defined(DJGPP)
3981 (void)strupr(old_var);
3984 sv = newSVpv(s+1, 0);
3985 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3986 if (env_is_not_environ)
3990 #endif /* USE_ENVIRON_ARRAY */
3991 #endif /* !PERL_MICRO */
3994 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3995 SvREADONLY_off(GvSV(tmpgv));
3996 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
3997 SvREADONLY_on(GvSV(tmpgv));
3999 #ifdef THREADS_HAVE_PIDS
4000 PL_ppid = (IV)getppid();
4003 /* touch @F array to prevent spurious warnings 20020415 MJD */
4005 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4010 S_init_perllib(pTHX)
4014 const char *perl5lib = NULL;
4023 perl5lib = PerlEnv_getenv("PERL5LIB");
4025 * It isn't possible to delete an environment variable with
4026 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4027 * case we treat PERL5LIB as undefined if it has a zero-length value.
4029 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4030 if (perl5lib && *perl5lib != '\0')
4034 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4036 s = PerlEnv_getenv("PERLLIB");
4038 incpush_use_sep(s, 0, 0);
4041 /* Treat PERL5?LIB as a possible search list logical name -- the
4042 * "natural" VMS idiom for a Unix path string. We allow each
4043 * element to be a set of |-separated directories for compatibility.
4047 if (my_trnlnm("PERL5LIB",buf,0))
4049 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4050 } while (my_trnlnm("PERL5LIB",buf,++idx));
4052 while (my_trnlnm("PERLLIB",buf,idx++))
4053 incpush_use_sep(buf, 0, 0);
4058 /* Use the ~-expanded versions of APPLLIB (undocumented),
4059 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4062 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4063 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4067 /* sitearch is always relative to sitelib on Windows for
4068 * DLL-based path intuition to work correctly */
4069 # if !defined(WIN32)
4070 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4071 INCPUSH_CAN_RELOCATE);
4077 /* this picks up sitearch as well */
4078 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4080 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4082 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4086 #ifdef PERL_VENDORARCH_EXP
4087 /* vendorarch is always relative to vendorlib on Windows for
4088 * DLL-based path intuition to work correctly */
4089 # if !defined(WIN32)
4090 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4091 INCPUSH_CAN_RELOCATE);
4095 #ifdef PERL_VENDORLIB_EXP
4097 /* this picks up vendorarch as well */
4098 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4100 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4102 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4103 INCPUSH_CAN_RELOCATE);
4108 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4112 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4116 s = win32_get_privlib(PERL_FS_VERSION, &len);
4118 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4121 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4123 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4127 #ifdef PERL_OTHERLIBDIRS
4128 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4129 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4130 |INCPUSH_CAN_RELOCATE);
4136 * It isn't possible to delete an environment variable with
4137 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4138 * case we treat PERL5LIB as undefined if it has a zero-length value.
4140 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4141 if (perl5lib && *perl5lib != '\0')
4145 incpush_use_sep(perl5lib, 0,
4146 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4148 /* Treat PERL5?LIB as a possible search list logical name -- the
4149 * "natural" VMS idiom for a Unix path string. We allow each
4150 * element to be a set of |-separated directories for compatibility.
4154 if (my_trnlnm("PERL5LIB",buf,0))
4156 incpush_use_sep(buf, 0,
4157 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4158 } while (my_trnlnm("PERL5LIB",buf,++idx));
4162 /* Use the ~-expanded versions of APPLLIB (undocumented),
4163 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4166 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4167 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4170 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4171 /* Search for version-specific dirs below here */
4172 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4173 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4177 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4178 /* Search for version-specific dirs below here */
4179 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4180 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4183 #ifdef PERL_OTHERLIBDIRS
4184 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4185 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4186 |INCPUSH_CAN_RELOCATE);
4190 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4193 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4194 # define PERLLIB_SEP ';'
4197 # define PERLLIB_SEP '|'
4199 # define PERLLIB_SEP ':'
4202 #ifndef PERLLIB_MANGLE
4203 # define PERLLIB_MANGLE(s,n) (s)
4206 /* Push a directory onto @INC if it exists.
4207 Generate a new SV if we do this, to save needing to copy the SV we push
4210 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4215 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4217 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4218 S_ISDIR(tmpstatbuf.st_mode)) {
4220 dir = newSVsv(stem);
4222 /* Truncate dir back to stem. */
4223 SvCUR_set(dir, SvCUR(stem));
4229 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4232 const U8 using_sub_dirs
4233 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4234 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4235 const U8 add_versioned_sub_dirs
4236 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4237 const U8 add_archonly_sub_dirs
4238 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4239 #ifdef PERL_INC_VERSION_LIST
4240 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4242 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4243 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4244 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4245 AV *const inc = GvAVn(PL_incgv);
4247 PERL_ARGS_ASSERT_INCPUSH;
4250 /* Could remove this vestigial extra block, if we don't mind a lot of
4251 re-indenting diff noise. */
4254 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4255 arranged to unshift #! line -I onto the front of @INC. However,
4256 -I can add version and architecture specific libraries, and they
4257 need to go first. The old code assumed that it was always
4258 pushing. Hence to make it work, need to push the architecture
4259 (etc) libraries onto a temporary array, then "unshift" that onto
4260 the front of @INC. */
4261 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4264 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4265 defined to so something (in os2/os2.c), but the code has been
4266 this way, ignoring any possible changed of length, since
4267 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4269 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4271 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4274 /* Do the if() outside the #ifdef to avoid warnings about an unused
4277 #ifdef PERL_RELOCATABLE_INC
4279 * Relocatable include entries are marked with a leading .../
4282 * 0: Remove that leading ".../"
4283 * 1: Remove trailing executable name (anything after the last '/')
4284 * from the perl path to give a perl prefix
4286 * While the @INC element starts "../" and the prefix ends with a real
4287 * directory (ie not . or ..) chop that real directory off the prefix
4288 * and the leading "../" from the @INC element. ie a logical "../"
4290 * Finally concatenate the prefix and the remainder of the @INC element
4291 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4292 * generates /usr/local/lib/perl5
4294 const char *libpath = SvPVX(libdir);
4295 STRLEN libpath_len = SvCUR(libdir);
4296 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4298 SV * const caret_X = get_sv("\030", 0);
4299 /* Going to use the SV just as a scratch buffer holding a C
4305 /* $^X is *the* source of taint if tainting is on, hence
4306 SvPOK() won't be true. */
4308 assert(SvPOKp(caret_X));
4309 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4311 /* Firstly take off the leading .../
4312 If all else fail we'll do the paths relative to the current
4314 sv_chop(libdir, libpath + 4);
4315 /* Don't use SvPV as we're intentionally bypassing taining,
4316 mortal copies that the mg_get of tainting creates, and
4317 corruption that seems to come via the save stack.
4318 I guess that the save stack isn't correctly set up yet. */
4319 libpath = SvPVX(libdir);
4320 libpath_len = SvCUR(libdir);
4322 /* This would work more efficiently with memrchr, but as it's
4323 only a GNU extension we'd need to probe for it and
4324 implement our own. Not hard, but maybe not worth it? */
4326 prefix = SvPVX(prefix_sv);
4327 lastslash = strrchr(prefix, '/');
4329 /* First time in with the *lastslash = '\0' we just wipe off
4330 the trailing /perl from (say) /usr/foo/bin/perl
4334 while ((*lastslash = '\0'), /* Do that, come what may. */
4335 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4336 && (lastslash = strrchr(prefix, '/')))) {
4337 if (lastslash[1] == '\0'
4338 || (lastslash[1] == '.'
4339 && (lastslash[2] == '/' /* ends "/." */
4340 || (lastslash[2] == '/'
4341 && lastslash[3] == '/' /* or "/.." */
4343 /* Prefix ends "/" or "/." or "/..", any of which
4344 are fishy, so don't do any more logical cleanup.
4348 /* Remove leading "../" from path */
4351 /* Next iteration round the loop removes the last
4352 directory name from prefix by writing a '\0' in
4353 the while clause. */
4355 /* prefix has been terminated with a '\0' to the correct
4356 length. libpath points somewhere into the libdir SV.
4357 We need to join the 2 with '/' and drop the result into
4359 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4360 SvREFCNT_dec(libdir);
4361 /* And this is the new libdir. */
4364 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4365 /* Need to taint reloccated paths if running set ID */
4366 SvTAINTED_on(libdir);
4369 SvREFCNT_dec(prefix_sv);
4374 * BEFORE pushing libdir onto @INC we may first push version- and
4375 * archname-specific sub-directories.
4377 if (using_sub_dirs) {
4379 #ifdef PERL_INC_VERSION_LIST
4380 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4381 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4382 const char * const *incver;
4389 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4391 while (unix[len-1] == '/') len--; /* Cosmetic */
4392 sv_usepvn(libdir,unix,len);
4395 PerlIO_printf(Perl_error_log,
4396 "Failed to unixify @INC element \"%s\"\n",
4400 subdir = newSVsv(libdir);
4402 if (add_versioned_sub_dirs) {
4403 /* .../version/archname if -d .../version/archname */
4404 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4405 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4407 /* .../version if -d .../version */
4408 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4409 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4412 #ifdef PERL_INC_VERSION_LIST
4414 for (incver = incverlist; *incver; incver++) {
4415 /* .../xxx if -d .../xxx */
4416 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4417 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4422 if (add_archonly_sub_dirs) {
4423 /* .../archname if -d .../archname */
4424 sv_catpvs(subdir, "/" ARCHNAME);
4425 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4429 assert (SvREFCNT(subdir) == 1);
4430 SvREFCNT_dec(subdir);
4433 /* finally add this lib directory at the end of @INC */
4435 U32 extra = av_len(av) + 1;
4436 av_unshift(inc, extra + push_basedir);
4438 av_store(inc, extra, libdir);
4440 /* av owns a reference, av_store() expects to be donated a
4441 reference, and av expects to be sane when it's cleared.
4442 If I wanted to be naughty and wrong, I could peek inside the
4443 implementation of av_clear(), realise that it uses
4444 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4445 and so directly steal from it (with a memcpy() to inc, and
4446 then memset() to NULL them out. But people copy code from the
4447 core expecting it to be best practise, so let's use the API.
4448 Although studious readers will note that I'm not checking any
4450 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4454 else if (push_basedir) {
4455 av_push(inc, libdir);
4458 if (!push_basedir) {
4459 assert (SvREFCNT(libdir) == 1);
4460 SvREFCNT_dec(libdir);
4466 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4470 /* This logic has been broken out from S_incpush(). It may be possible to
4473 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4480 /* Break at all separators */
4481 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4483 /* skip any consecutive separators */
4485 /* Uncomment the next line for PATH semantics */
4486 /* But you'll need to write tests */
4487 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4489 incpush(p, (STRLEN)(s - p), flags);
4494 incpush(p, (STRLEN)(end - p), flags);
4499 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4503 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4509 PERL_ARGS_ASSERT_CALL_LIST;
4511 while (av_len(paramList) >= 0) {
4512 cv = MUTABLE_CV(av_shift(paramList));
4514 if (paramList == PL_beginav) {
4515 /* save PL_beginav for compiler */
4516 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4518 else if (paramList == PL_checkav) {
4519 /* save PL_checkav for compiler */
4520 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4522 else if (paramList == PL_unitcheckav) {
4523 /* save PL_unitcheckav for compiler */
4524 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4535 PL_madskills |= 16384;
4540 PL_madskills &= ~16384;
4543 (void)SvPV_const(atsv, len);
4545 PL_curcop = &PL_compiling;
4546 CopLINE_set(PL_curcop, oldline);
4547 if (paramList == PL_beginav)
4548 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4550 Perl_sv_catpvf(aTHX_ atsv,
4551 "%s failed--call queue aborted",
4552 paramList == PL_checkav ? "CHECK"
4553 : paramList == PL_initav ? "INIT"
4554 : paramList == PL_unitcheckav ? "UNITCHECK"
4556 while (PL_scopestack_ix > oldscope)
4559 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4566 /* my_exit() was called */
4567 while (PL_scopestack_ix > oldscope)
4570 PL_curstash = PL_defstash;
4571 PL_curcop = &PL_compiling;
4572 CopLINE_set(PL_curcop, oldline);
4574 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4575 if (paramList == PL_beginav)
4576 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4578 Perl_croak(aTHX_ "%s failed--call queue aborted",
4579 paramList == PL_checkav ? "CHECK"
4580 : paramList == PL_initav ? "INIT"
4581 : paramList == PL_unitcheckav ? "UNITCHECK"
4588 PL_curcop = &PL_compiling;
4589 CopLINE_set(PL_curcop, oldline);
4592 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4601 Perl_my_exit(pTHX_ U32 status)
4612 STATUS_EXIT_SET(status);
4619 Perl_my_failure_exit(pTHX)
4623 /* We have been called to fall on our sword. The desired exit code
4624 * should be already set in STATUS_UNIX, but could be shifted over
4625 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4628 * If an error code has not been set, then force the issue.
4630 if (MY_POSIX_EXIT) {
4632 /* According to the die_exit.t tests, if errno is non-zero */
4633 /* It should be used for the error status. */
4635 if (errno == EVMSERR) {
4636 STATUS_NATIVE = vaxc$errno;
4639 /* According to die_exit.t tests, if the child_exit code is */
4640 /* also zero, then we need to exit with a code of 255 */
4641 if ((errno != 0) && (errno < 256))
4642 STATUS_UNIX_EXIT_SET(errno);
4643 else if (STATUS_UNIX < 255) {
4644 STATUS_UNIX_EXIT_SET(255);
4649 /* The exit code could have been set by $? or vmsish which
4650 * means that it may not have fatal set. So convert
4651 * success/warning codes to fatal with out changing
4652 * the POSIX status code. The severity makes VMS native
4653 * status handling work, while UNIX mode programs use the
4654 * the POSIX exit codes.
4656 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4657 STATUS_NATIVE &= STS$M_COND_ID;
4658 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4662 /* Traditionally Perl on VMS always expects a Fatal Error. */
4663 if (vaxc$errno & 1) {
4665 /* So force success status to failure */
4666 if (STATUS_NATIVE & 1)
4671 STATUS_UNIX = EINTR; /* In case something cares */
4676 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4678 /* Encode the severity code */
4679 severity = STATUS_NATIVE & STS$M_SEVERITY;
4680 STATUS_UNIX = (severity ? severity : 1) << 8;
4682 /* Perl expects this to be a fatal error */
4683 if (severity != STS$K_SEVERE)
4692 STATUS_UNIX_SET(errno);
4694 exitstatus = STATUS_UNIX >> 8;
4695 if (exitstatus & 255)
4696 STATUS_UNIX_SET(exitstatus);
4698 STATUS_UNIX_SET(255);
4705 S_my_exit_jump(pTHX)
4710 SvREFCNT_dec(PL_e_script);
4714 POPSTACK_TO(PL_mainstack);
4722 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4725 const char * const p = SvPVX_const(PL_e_script);
4726 const char *nl = strchr(p, '\n');
4728 PERL_UNUSED_ARG(idx);
4729 PERL_UNUSED_ARG(maxlen);
4731 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4733 filter_del(read_e_script);
4736 sv_catpvn(buf_sv, p, nl-p);
4737 sv_chop(PL_e_script, nl);
4743 * c-indentation-style: bsd
4745 * indent-tabs-mode: t
4748 * ex: set ts=8 sts=4 sw=4 noet: