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 */
35 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
40 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
42 # include <sys/wait.h>
50 char control[CMSG_SPACE(sizeof(int))];
67 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
68 char *getenv (char *); /* Usually in <stdlib.h> */
71 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
73 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
74 /* Drop everything. Heck, don't even try to call it */
75 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
77 /* Drop almost everything */
78 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
81 #define CALL_BODY_EVAL(myop) \
82 if (PL_op == (myop)) \
83 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
87 #define CALL_BODY_SUB(myop) \
88 if (PL_op == (myop)) \
89 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
93 #define CALL_LIST_BODY(cv) \
94 PUSHMARK(PL_stack_sp); \
95 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
98 S_init_tls_and_interp(PerlInterpreter *my_perl)
102 PERL_SET_INTERP(my_perl);
103 #if defined(USE_ITHREADS)
106 PERL_SET_THX(my_perl);
109 MUTEX_INIT(&PL_dollarzero_mutex);
111 #ifdef PERL_IMPLICIT_CONTEXT
112 MUTEX_INIT(&PL_my_ctx_mutex);
115 #if defined(USE_ITHREADS)
118 /* This always happens for non-ithreads */
121 PERL_SET_THX(my_perl);
126 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
129 Perl_sys_init(int* argc, char*** argv)
133 PERL_ARGS_ASSERT_SYS_INIT;
135 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
136 PERL_UNUSED_ARG(argv);
137 PERL_SYS_INIT_BODY(argc, argv);
141 Perl_sys_init3(int* argc, char*** argv, char*** env)
145 PERL_ARGS_ASSERT_SYS_INIT3;
147 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
148 PERL_UNUSED_ARG(argv);
149 PERL_UNUSED_ARG(env);
150 PERL_SYS_INIT3_BODY(argc, argv, env);
157 if (!PL_veto_cleanup) {
158 PERL_SYS_TERM_BODY();
163 #ifdef PERL_IMPLICIT_SYS
165 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
166 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
167 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
168 struct IPerlDir* ipD, struct IPerlSock* ipS,
169 struct IPerlProc* ipP)
171 PerlInterpreter *my_perl;
173 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
175 /* Newx() needs interpreter, so call malloc() instead */
176 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
177 S_init_tls_and_interp(my_perl);
178 Zero(my_perl, 1, PerlInterpreter);
188 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
195 =head1 Embedding Functions
197 =for apidoc perl_alloc
199 Allocates a new Perl interpreter. See L<perlembed>.
207 PerlInterpreter *my_perl;
209 /* Newx() needs interpreter, so call malloc() instead */
210 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
212 S_init_tls_and_interp(my_perl);
213 #ifndef PERL_TRACK_MEMPOOL
214 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
216 Zero(my_perl, 1, PerlInterpreter);
217 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
221 #endif /* PERL_IMPLICIT_SYS */
224 =for apidoc perl_construct
226 Initializes a new Perl interpreter. See L<perlembed>.
232 perl_construct(pTHXx)
236 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
240 PL_perl_destruct_level = 1;
242 PERL_UNUSED_ARG(my_perl);
243 if (PL_perl_destruct_level > 0)
246 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
248 /* set read-only and try to insure than we wont see REFCNT==0
251 SvREADONLY_on(&PL_sv_undef);
252 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
254 sv_setpv(&PL_sv_no,PL_No);
255 /* value lookup in void context - happens to have the side effect
256 of caching the numeric forms. However, as &PL_sv_no doesn't contain
257 a string that is a valid numer, we have to turn the public flags by
263 SvREADONLY_on(&PL_sv_no);
264 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
266 sv_setpv(&PL_sv_yes,PL_Yes);
269 SvREADONLY_on(&PL_sv_yes);
270 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
272 SvREADONLY_on(&PL_sv_placeholder);
273 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
275 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
276 #ifdef PERL_USES_PL_PIDSTATUS
277 PL_pidstatus = newHV();
280 PL_rs = newSVpvs("\n");
290 SET_NUMERIC_STANDARD();
292 #if defined(LOCAL_PATCH_COUNT)
293 PL_localpatches = local_patches; /* For possible -v */
296 #ifdef HAVE_INTERP_INTERN
300 PerlIO_init(aTHX); /* Hook to IO system */
302 PL_fdpid = newAV(); /* for remembering popen pids by fd */
303 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
304 PL_errors = newSVpvs("");
305 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
306 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
307 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
309 /* First entry is a list of empty elements. It needs to be initialised
310 else all hell breaks loose in S_find_uninit_var(). */
311 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
312 PL_regex_pad = AvARRAY(PL_regex_padav);
314 #ifdef USE_REENTRANT_API
315 Perl_reentrant_init(aTHX);
318 /* Note that strtab is a rather special HV. Assumptions are made
319 about not iterating on it, and not adding tie magic to it.
320 It is properly deallocated in perl_destruct() */
323 HvSHAREKEYS_off(PL_strtab); /* mandatory */
324 hv_ksplit(PL_strtab, 512);
326 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
327 _dyld_lookup_and_bind
328 ("__environ", (unsigned long *) &environ_pointer, NULL);
332 # ifdef USE_ENVIRON_ARRAY
333 PL_origenviron = environ;
337 /* Use sysconf(_SC_CLK_TCK) if available, if not
338 * available or if the sysconf() fails, use the HZ.
339 * BeOS has those, but returns the wrong value.
340 * The HZ if not originally defined has been by now
341 * been defined as CLK_TCK, if available. */
342 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
343 PL_clocktick = sysconf(_SC_CLK_TCK);
344 if (PL_clocktick <= 0)
348 PL_stashcache = newHV();
350 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
353 if (!PL_mmap_page_size) {
354 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
356 SETERRNO(0, SS_NORMAL);
358 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
360 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
362 if ((long) PL_mmap_page_size < 0) {
364 SV * const error = ERRSV;
365 SvUPGRADE(error, SVt_PV);
366 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
369 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
373 # ifdef HAS_GETPAGESIZE
374 PL_mmap_page_size = getpagesize();
376 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
377 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
381 if (PL_mmap_page_size <= 0)
382 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
383 (IV) PL_mmap_page_size);
385 #endif /* HAS_MMAP */
387 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
388 PL_timesbase.tms_utime = 0;
389 PL_timesbase.tms_stime = 0;
390 PL_timesbase.tms_cutime = 0;
391 PL_timesbase.tms_cstime = 0;
394 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
396 PL_registered_mros = newHV();
397 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
398 HvMAX(PL_registered_mros) = 0;
404 =for apidoc nothreadhook
406 Stub that provides thread hook for perl_destruct when there are
413 Perl_nothreadhook(pTHX)
419 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
421 Perl_dump_sv_child(pTHX_ SV *sv)
424 const int sock = PL_dumper_fd;
425 const int debug_fd = PerlIO_fileno(Perl_debug_log);
426 union control_un control;
429 struct cmsghdr *cmptr;
431 unsigned char buffer[256];
433 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
435 if(sock == -1 || debug_fd == -1)
438 PerlIO_flush(Perl_debug_log);
440 /* All these shenanigans are to pass a file descriptor over to our child for
441 it to dump out to. We can't let it hold open the file descriptor when it
442 forks, as the file descriptor it will dump to can turn out to be one end
443 of pipe that some other process will wait on for EOF. (So as it would
444 be open, the wait would be forever.) */
446 msg.msg_control = control.control;
447 msg.msg_controllen = sizeof(control.control);
448 /* We're a connected socket so we don't need a destination */
454 cmptr = CMSG_FIRSTHDR(&msg);
455 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
456 cmptr->cmsg_level = SOL_SOCKET;
457 cmptr->cmsg_type = SCM_RIGHTS;
458 *((int *)CMSG_DATA(cmptr)) = 1;
460 vec[0].iov_base = (void*)&sv;
461 vec[0].iov_len = sizeof(sv);
462 got = sendmsg(sock, &msg, 0);
465 perror("Debug leaking scalars parent sendmsg failed");
468 if(got < sizeof(sv)) {
469 perror("Debug leaking scalars parent short sendmsg");
473 /* Return protocol is
475 unsigned char: length of location string (0 for empty)
476 unsigned char*: string (not terminated)
478 vec[0].iov_base = (void*)&returned_errno;
479 vec[0].iov_len = sizeof(returned_errno);
480 vec[1].iov_base = buffer;
483 got = readv(sock, vec, 2);
486 perror("Debug leaking scalars parent read failed");
487 PerlIO_flush(PerlIO_stderr());
490 if(got < sizeof(returned_errno) + 1) {
491 perror("Debug leaking scalars parent short read");
492 PerlIO_flush(PerlIO_stderr());
497 got = read(sock, buffer + 1, *buffer);
499 perror("Debug leaking scalars parent read 2 failed");
500 PerlIO_flush(PerlIO_stderr());
505 perror("Debug leaking scalars parent short read 2");
506 PerlIO_flush(PerlIO_stderr());
511 if (returned_errno || *buffer) {
512 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
513 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
514 returned_errno, strerror(returned_errno));
520 =for apidoc perl_destruct
522 Shuts down a Perl interpreter. See L<perlembed>.
531 VOL signed char destruct_level; /* see possible values in intrpvar.h */
533 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
537 PERL_ARGS_ASSERT_PERL_DESTRUCT;
539 PERL_UNUSED_ARG(my_perl);
542 /* wait for all pseudo-forked children to finish */
543 PERL_WAIT_FOR_CHILDREN;
545 destruct_level = PL_perl_destruct_level;
548 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
550 const int i = atoi(s);
551 if (destruct_level < i)
557 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
563 if (PL_endav && !PL_minus_c)
564 call_list(PL_scopestack_ix, PL_endav);
570 /* Need to flush since END blocks can produce output */
573 if (CALL_FPTR(PL_threadhook)(aTHX)) {
574 /* Threads hook has vetoed further cleanup */
575 PL_veto_cleanup = TRUE;
579 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
580 if (destruct_level != 0) {
581 /* Fork here to create a child. Our child's job is to preserve the
582 state of scalars prior to destruction, so that we can instruct it
583 to dump any scalars that we later find have leaked.
584 There's no subtlety in this code - it assumes POSIX, and it doesn't
588 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
589 perror("Debug leaking scalars socketpair failed");
595 perror("Debug leaking scalars fork failed");
599 /* We are the child */
600 const int sock = fd[1];
601 const int debug_fd = PerlIO_fileno(Perl_debug_log);
604 /* Our success message is an integer 0, and a char 0 */
605 static const char success[sizeof(int) + 1] = {0};
609 /* We need to close all other file descriptors otherwise we end up
610 with interesting hangs, where the parent closes its end of a
611 pipe, and sits waiting for (another) child to terminate. Only
612 that child never terminates, because it never gets EOF, because
613 we also have the far end of the pipe open. We even need to
614 close the debugging fd, because sometimes it happens to be one
615 end of a pipe, and a process is waiting on the other end for
616 EOF. Normally it would be closed at some point earlier in
617 destruction, but if we happen to cause the pipe to remain open,
618 EOF never occurs, and we get an infinite hang. Hence all the
619 games to pass in a file descriptor if it's actually needed. */
621 f = sysconf(_SC_OPEN_MAX);
623 where = "sysconf failed";
634 union control_un control;
637 struct cmsghdr *cmptr;
641 msg.msg_control = control.control;
642 msg.msg_controllen = sizeof(control.control);
643 /* We're a connected socket so we don't need a source */
647 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
649 vec[0].iov_base = (void*)⌖
650 vec[0].iov_len = sizeof(target);
652 got = recvmsg(sock, &msg, 0);
657 where = "recv failed";
660 if(got < sizeof(target)) {
661 where = "short recv";
665 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
669 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
670 where = "wrong cmsg_len";
673 if(cmptr->cmsg_level != SOL_SOCKET) {
674 where = "wrong cmsg_level";
677 if(cmptr->cmsg_type != SCM_RIGHTS) {
678 where = "wrong cmsg_type";
682 got_fd = *(int*)CMSG_DATA(cmptr);
683 /* For our last little bit of trickery, put the file descriptor
684 back into Perl_debug_log, as if we never actually closed it
686 if(got_fd != debug_fd) {
687 if (dup2(got_fd, debug_fd) == -1) {
694 PerlIO_flush(Perl_debug_log);
696 got = write(sock, &success, sizeof(success));
699 where = "write failed";
702 if(got < sizeof(success)) {
703 where = "short write";
710 int send_errno = errno;
711 unsigned char length = (unsigned char) strlen(where);
712 struct iovec failure[3] = {
713 {(void*)&send_errno, sizeof(send_errno)},
715 {(void*)where, length}
717 int got = writev(sock, failure, 3);
718 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
719 in the parent if we try to read from the socketpair after the
720 child has exited, even if there was data to read.
721 So sleep a bit to give the parent a fighting chance of
724 _exit((got == -1) ? errno : 0);
728 PL_dumper_fd = fd[0];
733 /* We must account for everything. */
735 /* Destroy the main CV and syntax tree */
736 /* Do this now, because destroying ops can cause new SVs to be generated
737 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
738 PL_curcop to point to a valid op from which the filename structure
740 PL_curcop = &PL_compiling;
742 /* ensure comppad/curpad to refer to main's pad */
743 if (CvPADLIST(PL_main_cv)) {
744 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
746 op_free(PL_main_root);
749 PL_main_start = NULL;
750 SvREFCNT_dec(PL_main_cv);
754 /* Tell PerlIO we are about to tear things apart in case
755 we have layers which are using resources that should
759 PerlIO_destruct(aTHX);
761 if (PL_sv_objcount) {
763 * Try to destruct global references. We do this first so that the
764 * destructors and destructees still exist. Some sv's might remain.
765 * Non-referenced objects are on their own.
769 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
770 PL_defoutgv = NULL; /* may have been freed */
773 /* unhook hooks which will soon be, or use, destroyed data */
774 SvREFCNT_dec(PL_warnhook);
776 SvREFCNT_dec(PL_diehook);
779 /* call exit list functions */
780 while (PL_exitlistlen-- > 0)
781 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
783 Safefree(PL_exitlist);
788 SvREFCNT_dec(PL_registered_mros);
790 /* jettison our possibly duplicated environment */
791 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
792 * so we certainly shouldn't free it here
795 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
796 if (environ != PL_origenviron && !PL_use_safe_putenv
798 /* only main thread can free environ[0] contents */
799 && PL_curinterp == aTHX
805 for (i = 0; environ[i]; i++)
806 safesysfree(environ[i]);
808 /* Must use safesysfree() when working with environ. */
809 safesysfree(environ);
811 environ = PL_origenviron;
814 #endif /* !PERL_MICRO */
816 if (destruct_level == 0) {
818 DEBUG_P(debprofdump());
820 #if defined(PERLIO_LAYERS)
821 /* No more IO - including error messages ! */
822 PerlIO_cleanup(aTHX);
825 CopFILE_free(&PL_compiling);
826 CopSTASH_free(&PL_compiling);
828 /* The exit() function will do everything that needs doing. */
832 /* reset so print() ends up where we expect */
836 /* the syntax tree is shared between clones
837 * so op_free(PL_main_root) only ReREFCNT_dec's
838 * REGEXPs in the parent interpreter
839 * we need to manually ReREFCNT_dec for the clones
841 SvREFCNT_dec(PL_regex_padav);
842 PL_regex_padav = NULL;
846 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
847 PL_stashcache = NULL;
849 /* loosen bonds of global variables */
851 /* XXX can PL_parser still be non-null here? */
852 if(PL_parser && PL_parser->rsfp) {
853 (void)PerlIO_close(PL_parser->rsfp);
854 PL_parser->rsfp = NULL;
858 Safefree(PL_splitstr);
868 PL_doswitches = FALSE;
869 PL_dowarn = G_WARN_OFF;
870 PL_doextract = FALSE;
871 PL_sawampersand = FALSE; /* must save all match strings */
874 Safefree(PL_inplace);
876 SvREFCNT_dec(PL_patchlevel);
879 SvREFCNT_dec(PL_e_script);
885 /* magical thingies */
887 SvREFCNT_dec(PL_ofsgv); /* *, */
890 SvREFCNT_dec(PL_ors_sv); /* $\ */
893 SvREFCNT_dec(PL_rs); /* $/ */
896 Safefree(PL_osname); /* $^O */
899 SvREFCNT_dec(PL_statname);
903 /* defgv, aka *_ should be taken care of elsewhere */
905 /* clean up after study() */
906 SvREFCNT_dec(PL_lastscream);
907 PL_lastscream = NULL;
908 Safefree(PL_screamfirst);
910 Safefree(PL_screamnext);
914 Safefree(PL_efloatbuf);
918 /* startup and shutdown function lists */
919 SvREFCNT_dec(PL_beginav);
920 SvREFCNT_dec(PL_beginav_save);
921 SvREFCNT_dec(PL_endav);
922 SvREFCNT_dec(PL_checkav);
923 SvREFCNT_dec(PL_checkav_save);
924 SvREFCNT_dec(PL_unitcheckav);
925 SvREFCNT_dec(PL_unitcheckav_save);
926 SvREFCNT_dec(PL_initav);
928 PL_beginav_save = NULL;
931 PL_checkav_save = NULL;
932 PL_unitcheckav = NULL;
933 PL_unitcheckav_save = NULL;
936 /* shortcuts just get cleared */
945 PL_last_in_gv = NULL;
957 SvREFCNT_dec(PL_argvout_stack);
958 PL_argvout_stack = NULL;
960 SvREFCNT_dec(PL_modglobal);
962 SvREFCNT_dec(PL_preambleav);
963 PL_preambleav = NULL;
964 SvREFCNT_dec(PL_subname);
966 #ifdef PERL_USES_PL_PIDSTATUS
967 SvREFCNT_dec(PL_pidstatus);
970 SvREFCNT_dec(PL_toptarget);
972 SvREFCNT_dec(PL_bodytarget);
973 PL_bodytarget = NULL;
974 PL_formtarget = NULL;
976 /* free locale stuff */
977 #ifdef USE_LOCALE_COLLATE
978 Safefree(PL_collation_name);
979 PL_collation_name = NULL;
982 #ifdef USE_LOCALE_NUMERIC
983 Safefree(PL_numeric_name);
984 PL_numeric_name = NULL;
985 SvREFCNT_dec(PL_numeric_radix_sv);
986 PL_numeric_radix_sv = NULL;
989 /* clear utf8 character classes */
990 SvREFCNT_dec(PL_utf8_alnum);
991 SvREFCNT_dec(PL_utf8_ascii);
992 SvREFCNT_dec(PL_utf8_alpha);
993 SvREFCNT_dec(PL_utf8_space);
994 SvREFCNT_dec(PL_utf8_cntrl);
995 SvREFCNT_dec(PL_utf8_graph);
996 SvREFCNT_dec(PL_utf8_digit);
997 SvREFCNT_dec(PL_utf8_upper);
998 SvREFCNT_dec(PL_utf8_lower);
999 SvREFCNT_dec(PL_utf8_print);
1000 SvREFCNT_dec(PL_utf8_punct);
1001 SvREFCNT_dec(PL_utf8_xdigit);
1002 SvREFCNT_dec(PL_utf8_mark);
1003 SvREFCNT_dec(PL_utf8_toupper);
1004 SvREFCNT_dec(PL_utf8_totitle);
1005 SvREFCNT_dec(PL_utf8_tolower);
1006 SvREFCNT_dec(PL_utf8_tofold);
1007 SvREFCNT_dec(PL_utf8_idstart);
1008 SvREFCNT_dec(PL_utf8_idcont);
1009 PL_utf8_alnum = NULL;
1010 PL_utf8_ascii = NULL;
1011 PL_utf8_alpha = NULL;
1012 PL_utf8_space = NULL;
1013 PL_utf8_cntrl = NULL;
1014 PL_utf8_graph = NULL;
1015 PL_utf8_digit = NULL;
1016 PL_utf8_upper = NULL;
1017 PL_utf8_lower = NULL;
1018 PL_utf8_print = NULL;
1019 PL_utf8_punct = NULL;
1020 PL_utf8_xdigit = NULL;
1021 PL_utf8_mark = NULL;
1022 PL_utf8_toupper = NULL;
1023 PL_utf8_totitle = NULL;
1024 PL_utf8_tolower = NULL;
1025 PL_utf8_tofold = NULL;
1026 PL_utf8_idstart = NULL;
1027 PL_utf8_idcont = NULL;
1029 if (!specialWARN(PL_compiling.cop_warnings))
1030 PerlMemShared_free(PL_compiling.cop_warnings);
1031 PL_compiling.cop_warnings = NULL;
1032 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1033 PL_compiling.cop_hints_hash = NULL;
1034 CopFILE_free(&PL_compiling);
1035 CopSTASH_free(&PL_compiling);
1037 /* Prepare to destruct main symbol table. */
1042 SvREFCNT_dec(PL_curstname);
1043 PL_curstname = NULL;
1045 /* clear queued errors */
1046 SvREFCNT_dec(PL_errors);
1049 SvREFCNT_dec(PL_isarev);
1052 if (destruct_level >= 2) {
1053 if (PL_scopestack_ix != 0)
1054 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1055 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1056 (long)PL_scopestack_ix);
1057 if (PL_savestack_ix != 0)
1058 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1059 "Unbalanced saves: %ld more saves than restores\n",
1060 (long)PL_savestack_ix);
1061 if (PL_tmps_floor != -1)
1062 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1063 (long)PL_tmps_floor + 1);
1064 if (cxstack_ix != -1)
1065 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1066 (long)cxstack_ix + 1);
1069 /* Now absolutely destruct everything, somehow or other, loops or no. */
1071 /* the 2 is for PL_fdpid and PL_strtab */
1072 while (sv_clean_all() > 2)
1075 AvREAL_off(PL_fdpid); /* no surviving entries */
1076 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1079 #ifdef HAVE_INTERP_INTERN
1083 /* Destruct the global string table. */
1085 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1086 * so that sv_free() won't fail on them.
1087 * Now that the global string table is using a single hunk of memory
1088 * for both HE and HEK, we either need to explicitly unshare it the
1089 * correct way, or actually free things here.
1092 const I32 max = HvMAX(PL_strtab);
1093 HE * const * const array = HvARRAY(PL_strtab);
1094 HE *hent = array[0];
1097 if (hent && ckWARN_d(WARN_INTERNAL)) {
1098 HE * const next = HeNEXT(hent);
1099 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1100 "Unbalanced string table refcount: (%ld) for \"%s\"",
1101 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1108 hent = array[riter];
1113 HvARRAY(PL_strtab) = 0;
1114 HvTOTALKEYS(PL_strtab) = 0;
1115 HvFILL(PL_strtab) = 0;
1117 SvREFCNT_dec(PL_strtab);
1120 /* free the pointer tables used for cloning */
1121 ptr_table_free(PL_ptr_table);
1122 PL_ptr_table = (PTR_TBL_t*)NULL;
1125 /* free special SVs */
1127 SvREFCNT(&PL_sv_yes) = 0;
1128 sv_clear(&PL_sv_yes);
1129 SvANY(&PL_sv_yes) = NULL;
1130 SvFLAGS(&PL_sv_yes) = 0;
1132 SvREFCNT(&PL_sv_no) = 0;
1133 sv_clear(&PL_sv_no);
1134 SvANY(&PL_sv_no) = NULL;
1135 SvFLAGS(&PL_sv_no) = 0;
1139 for (i=0; i<=2; i++) {
1140 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1141 sv_clear(PERL_DEBUG_PAD(i));
1142 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1143 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1147 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1148 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1150 #ifdef DEBUG_LEAKING_SCALARS
1151 if (PL_sv_count != 0) {
1156 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1157 svend = &sva[SvREFCNT(sva)];
1158 for (sv = sva + 1; sv < svend; ++sv) {
1159 if (SvTYPE(sv) != SVTYPEMASK) {
1160 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1162 " refcnt=%"UVuf pTHX__FORMAT "\n"
1163 "\tallocated at %s:%d %s %s%s\n",
1164 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1166 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1168 sv->sv_debug_inpad ? "for" : "by",
1169 sv->sv_debug_optype ?
1170 PL_op_name[sv->sv_debug_optype]: "(none)",
1171 sv->sv_debug_cloned ? " (cloned)" : ""
1173 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1174 Perl_dump_sv_child(aTHX_ sv);
1180 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1184 /* Wait for up to 4 seconds for child to terminate.
1185 This seems to be the least effort way of timing out on reaping
1187 struct timeval waitfor = {4, 0};
1188 int sock = PL_dumper_fd;
1192 FD_SET(sock, &rset);
1193 select(sock + 1, &rset, NULL, NULL, &waitfor);
1194 waitpid(child, &status, WNOHANG);
1199 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1205 #ifdef PERL_DEBUG_READONLY_OPS
1211 #if defined(PERLIO_LAYERS)
1212 /* No more IO - including error messages ! */
1213 PerlIO_cleanup(aTHX);
1216 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1217 as currently layers use it rather than NULL as a marker
1218 for no arg - and will try and SvREFCNT_dec it.
1220 SvREFCNT(&PL_sv_undef) = 0;
1221 SvREADONLY_off(&PL_sv_undef);
1223 Safefree(PL_origfilename);
1224 PL_origfilename = NULL;
1225 Safefree(PL_reg_start_tmp);
1226 PL_reg_start_tmp = (char**)NULL;
1227 PL_reg_start_tmpl = 0;
1228 Safefree(PL_reg_curpm);
1229 Safefree(PL_reg_poscache);
1230 free_tied_hv_pool();
1231 Safefree(PL_op_mask);
1232 Safefree(PL_psig_name);
1233 PL_psig_name = (SV**)NULL;
1234 PL_psig_ptr = (SV**)NULL;
1235 Safefree(PL_psig_pend);
1236 PL_psig_pend = (int*)NULL;
1238 /* We need to NULL PL_psig_pend first, so that
1239 signal handlers know not to use it */
1240 int *psig_save = PL_psig_pend;
1241 PL_psig_pend = (int*)NULL;
1242 Safefree(psig_save);
1246 PL_tainting = FALSE;
1247 PL_taint_warn = FALSE;
1248 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1251 DEBUG_P(debprofdump());
1253 #ifdef USE_REENTRANT_API
1254 Perl_reentrant_free(aTHX);
1259 while (PL_regmatch_slab) {
1260 regmatch_slab *s = PL_regmatch_slab;
1261 PL_regmatch_slab = PL_regmatch_slab->next;
1265 /* As the absolutely last thing, free the non-arena SV for mess() */
1268 /* we know that type == SVt_PVMG */
1270 /* it could have accumulated taint magic */
1273 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1274 moremagic = mg->mg_moremagic;
1275 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1277 Safefree(mg->mg_ptr);
1281 /* we know that type >= SVt_PV */
1282 SvPV_free(PL_mess_sv);
1283 Safefree(SvANY(PL_mess_sv));
1284 Safefree(PL_mess_sv);
1291 =for apidoc perl_free
1293 Releases a Perl interpreter. See L<perlembed>.
1303 PERL_ARGS_ASSERT_PERL_FREE;
1305 if (PL_veto_cleanup)
1308 #ifdef PERL_TRACK_MEMPOOL
1311 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1312 * value as we're probably hunting memory leaks then
1314 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1315 if (!s || atoi(s) == 0) {
1316 const U32 old_debug = PL_debug;
1317 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1318 thread at thread exit. */
1320 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1321 "free this thread's memory\n");
1322 PL_debug &= ~ DEBUG_m_FLAG;
1324 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1325 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1326 PL_debug = old_debug;
1331 #if defined(WIN32) || defined(NETWARE)
1332 # if defined(PERL_IMPLICIT_SYS)
1335 void *host = nw_internal_host;
1337 void *host = w32_internal_host;
1339 PerlMem_free(aTHXx);
1341 nw_delete_internal_host(host);
1343 win32_delete_internal_host(host);
1347 PerlMem_free(aTHXx);
1350 PerlMem_free(aTHXx);
1354 #if defined(USE_ITHREADS)
1355 /* provide destructors to clean up the thread key when libperl is unloaded */
1356 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1358 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1359 #pragma fini "perl_fini"
1360 #elif defined(__sun) && !defined(__GNUC__)
1361 #pragma fini (perl_fini)
1365 #if defined(__GNUC__)
1366 __attribute__((destructor))
1371 if (PL_curinterp && !PL_veto_cleanup)
1376 #endif /* THREADS */
1379 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1382 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1383 PL_exitlist[PL_exitlistlen].fn = fn;
1384 PL_exitlist[PL_exitlistlen].ptr = ptr;
1388 #ifdef HAS_PROCSELFEXE
1389 /* This is a function so that we don't hold on to MAXPATHLEN
1390 bytes of stack longer than necessary
1393 S_procself_val(pTHX_ SV *sv, const char *arg0)
1395 char buf[MAXPATHLEN];
1396 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1398 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1399 includes a spurious NUL which will cause $^X to fail in system
1400 or backticks (this will prevent extensions from being built and
1401 many tests from working). readlink is not meant to add a NUL.
1402 Normal readlink works fine.
1404 if (len > 0 && buf[len-1] == '\0') {
1408 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1409 returning the text "unknown" from the readlink rather than the path
1410 to the executable (or returning an error from the readlink). Any valid
1411 path has a '/' in it somewhere, so use that to validate the result.
1412 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1414 if (len > 0 && memchr(buf, '/', len)) {
1415 sv_setpvn(sv,buf,len);
1421 #endif /* HAS_PROCSELFEXE */
1424 S_set_caret_X(pTHX) {
1426 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1428 #ifdef HAS_PROCSELFEXE
1429 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1432 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1434 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1441 =for apidoc perl_parse
1443 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1449 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1456 PERL_ARGS_ASSERT_PERL_PARSE;
1457 #ifndef MULTIPLICITY
1458 PERL_UNUSED_ARG(my_perl);
1461 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1462 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1463 * This MUST be done before any hash stores or fetches take place.
1464 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1465 * yourself, it is your responsibility to provide a good random seed!
1466 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1467 if (!PL_rehash_seed_set)
1468 PL_rehash_seed = get_hash_seed();
1470 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1472 if (s && (atoi(s) == 1))
1473 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1475 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1480 if (PL_origalen != 0) {
1481 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1484 /* Set PL_origalen be the sum of the contiguous argv[]
1485 * elements plus the size of the env in case that it is
1486 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1487 * as the maximum modifiable length of $0. In the worst case
1488 * the area we are able to modify is limited to the size of
1489 * the original argv[0]. (See below for 'contiguous', though.)
1491 const char *s = NULL;
1494 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1495 /* Do the mask check only if the args seem like aligned. */
1497 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1499 /* See if all the arguments are contiguous in memory. Note
1500 * that 'contiguous' is a loose term because some platforms
1501 * align the argv[] and the envp[]. If the arguments look
1502 * like non-aligned, assume that they are 'strictly' or
1503 * 'traditionally' contiguous. If the arguments look like
1504 * aligned, we just check that they are within aligned
1505 * PTRSIZE bytes. As long as no system has something bizarre
1506 * like the argv[] interleaved with some other data, we are
1507 * fine. (Did I just evoke Murphy's Law?) --jhi */
1508 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1510 for (i = 1; i < PL_origargc; i++) {
1511 if ((PL_origargv[i] == s + 1
1513 || PL_origargv[i] == s + 2
1518 (PL_origargv[i] > s &&
1520 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1531 #ifndef PERL_USE_SAFE_PUTENV
1532 /* Can we grab env area too to be used as the area for $0? */
1533 if (s && PL_origenviron && !PL_use_safe_putenv) {
1534 if ((PL_origenviron[0] == s + 1)
1537 (PL_origenviron[0] > s &&
1538 PL_origenviron[0] <=
1539 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1542 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1543 s = PL_origenviron[0];
1546 my_setenv("NoNe SuCh", NULL);
1547 /* Force copy of environment. */
1548 for (i = 1; PL_origenviron[i]; i++) {
1549 if (PL_origenviron[i] == s + 1
1552 (PL_origenviron[i] > s &&
1553 PL_origenviron[i] <=
1554 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1557 s = PL_origenviron[i];
1565 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1567 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1572 /* Come here if running an undumped a.out. */
1574 PL_origfilename = savepv(argv[0]);
1575 PL_do_undump = FALSE;
1576 cxstack_ix = -1; /* start label stack again */
1578 assert (!PL_tainted);
1580 S_set_caret_X(aTHX);
1582 init_postdump_symbols(argc,argv,env);
1587 op_free(PL_main_root);
1588 PL_main_root = NULL;
1590 PL_main_start = NULL;
1591 SvREFCNT_dec(PL_main_cv);
1595 oldscope = PL_scopestack_ix;
1596 PL_dowarn = G_WARN_OFF;
1601 parse_body(env,xsinit);
1603 call_list(oldscope, PL_unitcheckav);
1605 call_list(oldscope, PL_checkav);
1612 /* my_exit() was called */
1613 while (PL_scopestack_ix > oldscope)
1616 PL_curstash = PL_defstash;
1618 call_list(oldscope, PL_unitcheckav);
1620 call_list(oldscope, PL_checkav);
1624 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1632 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1633 miniperl, and we need to see those flags reflected in the values here. */
1635 /* What this returns is subject to change. Use the public interface in Config.
1638 S_Internals_V(pTHX_ CV *cv)
1641 #ifdef LOCAL_PATCH_COUNT
1642 const int local_patch_count = LOCAL_PATCH_COUNT;
1644 const int local_patch_count = 0;
1646 const int entries = 3 + local_patch_count;
1648 static char non_bincompat_options[] =
1655 # ifdef PERL_DISABLE_PMC
1658 # ifdef PERL_DONT_CREATE_GVSV
1659 " PERL_DONT_CREATE_GVSV"
1661 # ifdef PERL_IS_MINIPERL
1664 # ifdef PERL_MALLOC_WRAP
1667 # ifdef PERL_MEM_LOG
1670 # ifdef PERL_MEM_LOG_NOIMPL
1671 " PERL_MEM_LOG_NOIMPL"
1673 # ifdef PERL_USE_DEVEL
1676 # ifdef PERL_USE_SAFE_PUTENV
1677 " PERL_USE_SAFE_PUTENV"
1679 # ifdef USE_SITECUSTOMIZE
1680 " USE_SITECUSTOMIZE"
1682 # ifdef USE_FAST_STDIO
1686 PERL_UNUSED_ARG(cv);
1687 PERL_UNUSED_ARG(items);
1689 EXTEND(SP, entries);
1691 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1692 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1693 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1697 PUSHs(Perl_newSVpvn_flags(aTHX_
1698 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1701 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1705 PUSHs(&PL_sv_undef);
1708 for (i = 1; i <= local_patch_count; i++) {
1709 /* This will be an undef, if PL_localpatches[i] is NULL. */
1710 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1716 #define INCPUSH_UNSHIFT 0x01
1717 #define INCPUSH_ADD_OLD_VERS 0x02
1718 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1719 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1720 #define INCPUSH_NOT_BASEDIR 0x10
1721 #define INCPUSH_CAN_RELOCATE 0x20
1722 #define INCPUSH_ADD_SUB_DIRS \
1723 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1726 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1730 int argc = PL_origargc;
1731 char **argv = PL_origargv;
1732 const char *scriptname = NULL;
1733 VOL bool dosearch = FALSE;
1735 const char *cddir = NULL;
1736 #ifdef USE_SITECUSTOMIZE
1737 bool minus_f = FALSE;
1739 SV *linestr_sv = newSV_type(SVt_PVIV);
1740 bool add_read_e_script = FALSE;
1742 SvGROW(linestr_sv, 80);
1743 sv_setpvs(linestr_sv,"");
1749 for (argc--,argv++; argc > 0; argc--,argv++) {
1750 if (argv[0][0] != '-' || !argv[0][1])
1756 #ifndef PERL_STRICT_CR
1780 if ((s = moreswitches(s)))
1785 CHECK_MALLOC_TOO_LATE_FOR('t');
1786 if( !PL_tainting ) {
1787 PL_taint_warn = TRUE;
1793 CHECK_MALLOC_TOO_LATE_FOR('T');
1795 PL_taint_warn = FALSE;
1803 forbid_setid('e', FALSE);
1805 PL_e_script = newSVpvs("");
1806 add_read_e_script = TRUE;
1809 sv_catpv(PL_e_script, s);
1811 sv_catpv(PL_e_script, argv[1]);
1815 Perl_croak(aTHX_ "No code specified for -%c", c);
1816 sv_catpvs(PL_e_script, "\n");
1820 #ifdef USE_SITECUSTOMIZE
1826 case 'I': /* -I handled both here and in moreswitches() */
1827 forbid_setid('I', FALSE);
1828 if (!*++s && (s=argv[1]) != NULL) {
1832 STRLEN len = strlen(s);
1833 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1836 Perl_croak(aTHX_ "No directory specified for -I");
1839 forbid_setid('S', FALSE);
1848 opts_prog = newSVpvs("use Config; Config::_V()");
1852 opts_prog = Perl_newSVpvf(aTHX_
1853 "use Config; Config::config_vars(qw%c%s%c)",
1857 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1858 /* don't look for script or read stdin */
1859 scriptname = BIT_BUCKET;
1863 PL_doextract = TRUE;
1871 if (!*++s || isSPACE(*s)) {
1875 /* catch use of gnu style long options */
1876 if (strEQ(s, "version")) {
1880 if (strEQ(s, "help")) {
1887 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1898 #ifndef SECURE_INTERNAL_GETENV
1901 (s = PerlEnv_getenv("PERL5OPT")))
1905 if (*s == '-' && *(s+1) == 'T') {
1906 CHECK_MALLOC_TOO_LATE_FOR('T');
1908 PL_taint_warn = FALSE;
1911 char *popt_copy = NULL;
1924 if (!strchr("CDIMUdmtwW", *s))
1925 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1929 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1930 s = popt_copy + (s - d);
1938 if( !PL_tainting ) {
1939 PL_taint_warn = TRUE;
1950 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1952 /* SITELIB_EXP is a function call on Win32.
1953 The games with local $! are to avoid setting errno if there is no
1954 sitecustomize script. */
1955 const char *const sitelib = SITELIB_EXP;
1956 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1958 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1963 scriptname = argv[0];
1966 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1968 else if (scriptname == NULL) {
1970 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1976 /* Set $^X early so that it can be used for relocatable paths in @INC */
1977 assert (!PL_tainted);
1979 S_set_caret_X(aTHX);
1984 bool suidscript = FALSE;
1986 open_script(scriptname, dosearch, &suidscript, &rsfp);
1988 validate_suid(validarg, scriptname, fdscript, suidscript,
1992 # if defined(SIGCHLD) || defined(SIGCLD)
1995 # define SIGCHLD SIGCLD
1997 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1998 if (sigstate == (Sighandler_t) SIG_IGN) {
1999 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2000 "Can't ignore signal CHLD, forcing to default");
2001 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2009 /* This will croak if suidscript is true, as -x cannot be used with
2011 forbid_setid('x', suidscript);
2012 /* Hence you can't get here if suidscript is true */
2014 find_beginning(linestr_sv, rsfp);
2015 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2016 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2020 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2021 CvUNIQUE_on(PL_compcv);
2023 CvPADLIST(PL_compcv) = pad_new(0);
2025 PL_isarev = newHV();
2028 boot_core_UNIVERSAL();
2030 newXS("Internals::V", S_Internals_V, __FILE__);
2033 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2035 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2041 # ifdef HAS_SOCKS5_INIT
2042 socks5_init(argv[0]);
2048 init_predump_symbols();
2049 /* init_postdump_symbols not currently designed to be called */
2050 /* more than once (ENV isn't cleared first, for example) */
2051 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2053 init_postdump_symbols(argc,argv,env);
2055 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2056 * or explicitly in some platforms.
2057 * locale.c:Perl_init_i18nl10n() if the environment
2058 * look like the user wants to use UTF-8. */
2059 #if defined(__SYMBIAN32__)
2060 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2062 # ifndef PERL_IS_MINIPERL
2064 /* Requires init_predump_symbols(). */
2065 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2070 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2071 * and the default open disciplines. */
2072 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2073 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2075 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2076 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2077 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2079 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2080 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2081 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2083 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2084 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2085 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2087 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2088 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2091 sv_setpvs(sv, ":utf8\0:utf8");
2093 sv_setpvs(sv, ":utf8\0");
2096 sv_setpvs(sv, "\0:utf8");
2105 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2106 if (strEQ(s, "unsafe"))
2107 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2108 else if (strEQ(s, "safe"))
2109 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2111 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2118 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2122 PL_xmlfp = PerlIO_stdout();
2124 PL_xmlfp = PerlIO_open(s, "w");
2126 Perl_croak(aTHX_ "Can't open %s", s);
2128 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2134 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2135 PL_madskills = atoi(s);
2136 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2141 lex_start(linestr_sv, rsfp, TRUE);
2142 PL_subname = newSVpvs("main");
2144 if (add_read_e_script)
2145 filter_add(read_e_script, NULL);
2147 /* now parse the script */
2149 SETERRNO(0,SS_NORMAL);
2150 if (yyparse() || PL_parser->error_count) {
2152 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2154 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2158 CopLINE_set(PL_curcop, 0);
2159 PL_curstash = PL_defstash;
2161 SvREFCNT_dec(PL_e_script);
2169 SAVECOPFILE(PL_curcop);
2170 SAVECOPLINE(PL_curcop);
2171 gv_check(PL_defstash);
2180 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2181 dump_mstats("after compilation:");
2191 =for apidoc perl_run
2193 Tells a Perl interpreter to run. See L<perlembed>.
2206 PERL_ARGS_ASSERT_PERL_RUN;
2207 #ifndef MULTIPLICITY
2208 PERL_UNUSED_ARG(my_perl);
2211 oldscope = PL_scopestack_ix;
2219 cxstack_ix = -1; /* start context stack again */
2221 case 0: /* normal completion */
2225 case 2: /* my_exit() */
2226 while (PL_scopestack_ix > oldscope)
2229 PL_curstash = PL_defstash;
2230 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2231 PL_endav && !PL_minus_c)
2232 call_list(oldscope, PL_endav);
2234 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2235 dump_mstats("after execution: ");
2241 POPSTACK_TO(PL_mainstack);
2244 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2255 S_run_body(pTHX_ I32 oldscope)
2258 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2259 PL_sawampersand ? "Enabling" : "Omitting"));
2261 if (!PL_restartop) {
2265 exit(0); /* less likely to core dump than my_exit(0) */
2269 if (DEBUG_x_TEST || DEBUG_B_TEST)
2270 dump_all_perl(!DEBUG_B_TEST);
2272 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2276 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2279 if (PERLDB_SINGLE && PL_DBsingle)
2280 sv_setiv(PL_DBsingle, 1);
2282 call_list(oldscope, PL_initav);
2283 #ifdef PERL_DEBUG_READONLY_OPS
2284 Perl_pending_Slabs_to_ro(aTHX);
2291 PL_op = PL_restartop;
2295 else if (PL_main_start) {
2296 CvDEPTH(PL_main_cv) = 1;
2297 PL_op = PL_main_start;
2305 =head1 SV Manipulation Functions
2307 =for apidoc p||get_sv
2309 Returns the SV of the specified Perl scalar. C<flags> are passed to
2310 C<gv_fetchpv>. If C<GV_ADD> is set and the
2311 Perl variable does not exist then it will be created. If C<flags> is zero
2312 and the variable does not exist then NULL is returned.
2318 Perl_get_sv(pTHX_ const char *name, I32 flags)
2322 PERL_ARGS_ASSERT_GET_SV;
2324 gv = gv_fetchpv(name, flags, SVt_PV);
2331 =head1 Array Manipulation Functions
2333 =for apidoc p||get_av
2335 Returns the AV of the specified Perl array. C<flags> are passed to
2336 C<gv_fetchpv>. If C<GV_ADD> is set and the
2337 Perl variable does not exist then it will be created. If C<flags> is zero
2338 and the variable does not exist then NULL is returned.
2344 Perl_get_av(pTHX_ const char *name, I32 flags)
2346 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2348 PERL_ARGS_ASSERT_GET_AV;
2358 =head1 Hash Manipulation Functions
2360 =for apidoc p||get_hv
2362 Returns the HV of the specified Perl hash. C<flags> are passed to
2363 C<gv_fetchpv>. If C<GV_ADD> is set and the
2364 Perl variable does not exist then it will be created. If C<flags> is zero
2365 and the variable does not exist then NULL is returned.
2371 Perl_get_hv(pTHX_ const char *name, I32 flags)
2373 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2375 PERL_ARGS_ASSERT_GET_HV;
2385 =head1 CV Manipulation Functions
2387 =for apidoc p||get_cvn_flags
2389 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2390 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2391 exist then it will be declared (which has the same effect as saying
2392 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2393 then NULL is returned.
2395 =for apidoc p||get_cv
2397 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2403 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2405 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2406 /* XXX this is probably not what they think they're getting.
2407 * It has the same effect as "sub name;", i.e. just a forward
2410 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2412 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2413 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2414 return newSUB(start_subparse(FALSE, 0),
2415 newSVOP(OP_CONST, 0, sv),
2423 /* Nothing in core calls this now, but we can't replace it with a macro and
2424 move it to mathoms.c as a macro would evaluate name twice. */
2426 Perl_get_cv(pTHX_ const char *name, I32 flags)
2428 PERL_ARGS_ASSERT_GET_CV;
2430 return get_cvn_flags(name, strlen(name), flags);
2433 /* Be sure to refetch the stack pointer after calling these routines. */
2437 =head1 Callback Functions
2439 =for apidoc p||call_argv
2441 Performs a callback to the specified Perl sub. See L<perlcall>.
2447 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2449 /* See G_* flags in cop.h */
2450 /* null terminated arg list */
2455 PERL_ARGS_ASSERT_CALL_ARGV;
2460 mXPUSHs(newSVpv(*argv,0));
2465 return call_pv(sub_name, flags);
2469 =for apidoc p||call_pv
2471 Performs a callback to the specified Perl sub. See L<perlcall>.
2477 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2478 /* name of the subroutine */
2479 /* See G_* flags in cop.h */
2481 PERL_ARGS_ASSERT_CALL_PV;
2483 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2487 =for apidoc p||call_method
2489 Performs a callback to the specified Perl method. The blessed object must
2490 be on the stack. See L<perlcall>.
2496 Perl_call_method(pTHX_ const char *methname, I32 flags)
2497 /* name of the subroutine */
2498 /* See G_* flags in cop.h */
2501 PERL_ARGS_ASSERT_CALL_METHOD;
2503 len = strlen(methname);
2505 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2506 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2509 /* May be called with any of a CV, a GV, or an SV containing the name. */
2511 =for apidoc p||call_sv
2513 Performs a callback to the Perl sub whose name is in the SV. See
2520 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2521 /* See G_* flags in cop.h */
2524 LOGOP myop; /* fake syntax tree node */
2529 bool oldcatch = CATCH_GET;
2531 OP* const oldop = PL_op;
2534 PERL_ARGS_ASSERT_CALL_SV;
2536 if (flags & G_DISCARD) {
2540 if (!(flags & G_WANT)) {
2541 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2546 Zero(&myop, 1, LOGOP);
2547 myop.op_next = NULL;
2548 if (!(flags & G_NOARGS))
2549 myop.op_flags |= OPf_STACKED;
2550 myop.op_flags |= OP_GIMME_REVERSE(flags);
2554 EXTEND(PL_stack_sp, 1);
2555 *++PL_stack_sp = sv;
2557 oldscope = PL_scopestack_ix;
2559 if (PERLDB_SUB && PL_curstash != PL_debstash
2560 /* Handle first BEGIN of -d. */
2561 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2562 /* Try harder, since this may have been a sighandler, thus
2563 * curstash may be meaningless. */
2564 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2565 && !(flags & G_NODEBUG))
2566 PL_op->op_private |= OPpENTERSUB_DB;
2568 if (flags & G_METHOD) {
2569 Zero(&method_op, 1, UNOP);
2570 method_op.op_next = PL_op;
2571 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2572 method_op.op_type = OP_METHOD;
2573 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2574 myop.op_type = OP_ENTERSUB;
2575 PL_op = (OP*)&method_op;
2578 if (!(flags & G_EVAL)) {
2580 CALL_BODY_SUB((OP*)&myop);
2581 retval = PL_stack_sp - (PL_stack_base + oldmark);
2582 CATCH_SET(oldcatch);
2585 myop.op_other = (OP*)&myop;
2587 create_eval_scope(flags|G_FAKINGEVAL);
2595 CALL_BODY_SUB((OP*)&myop);
2596 retval = PL_stack_sp - (PL_stack_base + oldmark);
2597 if (!(flags & G_KEEPERR)) {
2605 /* my_exit() was called */
2606 PL_curstash = PL_defstash;
2609 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2610 Perl_croak(aTHX_ "Callback called exit");
2615 PL_op = PL_restartop;
2619 PL_stack_sp = PL_stack_base + oldmark;
2620 if ((flags & G_WANT) == G_ARRAY)
2624 *++PL_stack_sp = &PL_sv_undef;
2629 if (PL_scopestack_ix > oldscope)
2630 delete_eval_scope();
2634 if (flags & G_DISCARD) {
2635 PL_stack_sp = PL_stack_base + oldmark;
2644 /* Eval a string. The G_EVAL flag is always assumed. */
2647 =for apidoc p||eval_sv
2649 Tells Perl to C<eval> the string in the SV.
2655 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2657 /* See G_* flags in cop.h */
2661 UNOP myop; /* fake syntax tree node */
2662 VOL I32 oldmark = SP - PL_stack_base;
2665 OP* const oldop = PL_op;
2668 PERL_ARGS_ASSERT_EVAL_SV;
2670 if (flags & G_DISCARD) {
2677 Zero(PL_op, 1, UNOP);
2678 EXTEND(PL_stack_sp, 1);
2679 *++PL_stack_sp = sv;
2681 if (!(flags & G_NOARGS))
2682 myop.op_flags = OPf_STACKED;
2683 myop.op_next = NULL;
2684 myop.op_type = OP_ENTEREVAL;
2685 myop.op_flags |= OP_GIMME_REVERSE(flags);
2686 if (flags & G_KEEPERR)
2687 myop.op_flags |= OPf_SPECIAL;
2689 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2690 * before a PUSHEVAL, which corrupts the stack after a croak */
2691 TAINT_PROPER("eval_sv()");
2697 CALL_BODY_EVAL((OP*)&myop);
2698 retval = PL_stack_sp - (PL_stack_base + oldmark);
2699 if (!(flags & G_KEEPERR)) {
2707 /* my_exit() was called */
2708 PL_curstash = PL_defstash;
2711 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2712 Perl_croak(aTHX_ "Callback called exit");
2717 PL_op = PL_restartop;
2721 PL_stack_sp = PL_stack_base + oldmark;
2722 if ((flags & G_WANT) == G_ARRAY)
2726 *++PL_stack_sp = &PL_sv_undef;
2732 if (flags & G_DISCARD) {
2733 PL_stack_sp = PL_stack_base + oldmark;
2743 =for apidoc p||eval_pv
2745 Tells Perl to C<eval> the given string and return an SV* result.
2751 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2755 SV* sv = newSVpv(p, 0);
2757 PERL_ARGS_ASSERT_EVAL_PV;
2759 eval_sv(sv, G_SCALAR);
2766 if (croak_on_error && SvTRUE(ERRSV)) {
2767 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2773 /* Require a module. */
2776 =head1 Embedding Functions
2778 =for apidoc p||require_pv
2780 Tells Perl to C<require> the file named by the string argument. It is
2781 analogous to the Perl code C<eval "require '$file'">. It's even
2782 implemented that way; consider using load_module instead.
2787 Perl_require_pv(pTHX_ const char *pv)
2793 PERL_ARGS_ASSERT_REQUIRE_PV;
2795 PUSHSTACKi(PERLSI_REQUIRE);
2797 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2798 eval_sv(sv_2mortal(sv), G_DISCARD);
2804 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2806 /* This message really ought to be max 23 lines.
2807 * Removed -h because the user already knows that option. Others? */
2809 static const char * const usage_msg[] = {
2810 "-0[octal] specify record separator (\\0, if no argument)",
2811 "-a autosplit mode with -n or -p (splits $_ into @F)",
2812 "-C[number/list] enables the listed Unicode features",
2813 "-c check syntax only (runs BEGIN and CHECK blocks)",
2814 "-d[:debugger] run program under debugger",
2815 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2816 "-e program one line of program (several -e's allowed, omit programfile)",
2817 "-E program like -e, but enables all optional features",
2818 "-f don't do $sitelib/sitecustomize.pl at startup",
2819 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2820 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2821 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2822 "-l[octal] enable line ending processing, specifies line terminator",
2823 "-[mM][-]module execute \"use/no module...\" before executing program",
2824 "-n assume \"while (<>) { ... }\" loop around program",
2825 "-p assume loop like -n but print line also, like sed",
2826 "-s enable rudimentary parsing for switches after programfile",
2827 "-S look for programfile using PATH environment variable",
2828 "-t enable tainting warnings",
2829 "-T enable tainting checks",
2830 "-u dump core after parsing program",
2831 "-U allow unsafe operations",
2832 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2833 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2834 "-w enable many useful warnings (RECOMMENDED)",
2835 "-W enable all warnings",
2836 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2837 "-X disable all warnings",
2841 const char * const *p = usage_msg;
2843 PERL_ARGS_ASSERT_USAGE;
2845 PerlIO_printf(PerlIO_stdout(),
2846 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2849 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2852 /* convert a string of -D options (or digits) into an int.
2853 * sets *s to point to the char after the options */
2857 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2859 static const char * const usage_msgd[] = {
2860 " Debugging flag values: (see also -d)",
2861 " p Tokenizing and parsing (with v, displays parse stack)",
2862 " s Stack snapshots (with v, displays all stacks)",
2863 " l Context (loop) stack processing",
2864 " t Trace execution",
2865 " o Method and overloading resolution",
2866 " c String/numeric conversions",
2867 " P Print profiling info, source file input state",
2868 " m Memory and SV allocation",
2869 " f Format processing",
2870 " r Regular expression parsing and execution",
2871 " x Syntax tree dump",
2872 " u Tainting checks",
2873 " H Hash dump -- usurps values()",
2874 " X Scratchpad allocation",
2877 " R Include reference counts of dumped variables (eg when using -Ds)",
2878 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2879 " v Verbose: use in conjunction with other flags",
2881 " A Consistency checks on internal structures",
2882 " q quiet - currently only suppresses the 'EXECUTING' message",
2883 " M trace smart match resolution",
2884 " B dump suBroutine definitions, including special Blocks like BEGIN",
2889 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2892 /* if adding extra options, remember to update DEBUG_MASK */
2893 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2895 for (; isALNUM(**s); (*s)++) {
2896 const char * const d = strchr(debopts,**s);
2898 i |= 1 << (d - debopts);
2899 else if (ckWARN_d(WARN_DEBUGGING))
2900 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2901 "invalid option -D%c, use -D'' to see choices\n", **s);
2904 else if (isDIGIT(**s)) {
2906 for (; isALNUM(**s); (*s)++) ;
2908 else if (givehelp) {
2909 const char *const *p = usage_msgd;
2910 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2913 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2914 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2915 "-Dp not implemented on this platform\n");
2921 /* This routine handles any switches that can be given during run */
2924 Perl_moreswitches(pTHX_ const char *s)
2928 const char option = *s; /* used to remember option in -m/-M code */
2930 PERL_ARGS_ASSERT_MORESWITCHES;
2938 SvREFCNT_dec(PL_rs);
2939 if (s[1] == 'x' && s[2]) {
2940 const char *e = s+=2;
2946 flags = PERL_SCAN_SILENT_ILLDIGIT;
2947 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2948 if (s + numlen < e) {
2949 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2953 PL_rs = newSVpvs("");
2954 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2955 tmps = (U8*)SvPVX(PL_rs);
2956 uvchr_to_utf8(tmps, rschar);
2957 SvCUR_set(PL_rs, UNISKIP(rschar));
2962 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2963 if (rschar & ~((U8)~0))
2964 PL_rs = &PL_sv_undef;
2965 else if (!rschar && numlen >= 2)
2966 PL_rs = newSVpvs("");
2968 char ch = (char)rschar;
2969 PL_rs = newSVpvn(&ch, 1);
2972 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2977 PL_unicode = parse_unicode_opts( (const char **)&s );
2978 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2984 while (*s && !isSPACE(*s)) ++s;
2985 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2996 forbid_setid('d', FALSE);
2999 /* -dt indicates to the debugger that threads will be used */
3000 if (*s == 't' && !isALNUM(s[1])) {
3002 my_setenv("PERL5DB_THREADED", "1");
3005 /* The following permits -d:Mod to accepts arguments following an =
3006 in the fashion that -MSome::Mod does. */
3007 if (*s == ':' || *s == '=') {
3008 const char *start = ++s;
3009 const char *const end = s + strlen(s);
3010 SV * const sv = newSVpvs("use Devel::");
3012 /* We now allow -d:Module=Foo,Bar */
3013 while(isALNUM(*s) || *s==':') ++s;
3015 sv_catpvn(sv, start, end - start);
3017 sv_catpvn(sv, start, s-start);
3018 /* Don't use NUL as q// delimiter here, this string goes in the
3020 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3023 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3027 PL_perldb = PERLDB_ALL;
3034 forbid_setid('D', FALSE);
3036 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3037 #else /* !DEBUGGING */
3038 if (ckWARN_d(WARN_DEBUGGING))
3039 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3040 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3041 for (s++; isALNUM(*s); s++) ;
3046 usage(PL_origargv[0]);
3049 Safefree(PL_inplace);
3050 #if defined(__CYGWIN__) /* do backup extension automagically */
3051 if (*(s+1) == '\0') {
3052 PL_inplace = savepvs(".bak");
3055 #endif /* __CYGWIN__ */
3057 const char * const start = ++s;
3058 while (*s && !isSPACE(*s))
3061 PL_inplace = savepvn(start, s - start);
3065 if (*s == '-') /* Additional switches on #! line. */
3069 case 'I': /* -I handled both here and in parse_body() */
3070 forbid_setid('I', FALSE);
3072 while (*s && isSPACE(*s))
3077 /* ignore trailing spaces (possibly followed by other switches) */
3079 for (e = p; *e && !isSPACE(*e); e++) ;
3083 } while (*p && *p != '-');
3085 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3091 Perl_croak(aTHX_ "No directory specified for -I");
3097 SvREFCNT_dec(PL_ors_sv);
3103 PL_ors_sv = newSVpvs("\n");
3104 numlen = 3 + (*s == '0');
3105 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3109 if (RsPARA(PL_rs)) {
3110 PL_ors_sv = newSVpvs("\n\n");
3113 PL_ors_sv = newSVsv(PL_rs);
3118 forbid_setid('M', FALSE); /* XXX ? */
3121 forbid_setid('m', FALSE); /* XXX ? */
3126 const char *use = "use ";
3128 /* -M-foo == 'no foo' */
3129 /* Leading space on " no " is deliberate, to make both
3130 possibilities the same length. */
3131 if (*s == '-') { use = " no "; ++s; }
3132 sv = newSVpvn(use,4);
3134 /* We allow -M'Module qw(Foo Bar)' */
3135 while(isALNUM(*s) || *s==':') {
3144 Perl_croak(aTHX_ "Module name required with -%c option",
3147 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3148 "contains single ':'",
3149 (int)(s - start), start, option);
3150 end = s + strlen(s);
3152 sv_catpvn(sv, start, end - start);
3153 if (option == 'm') {
3155 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3156 sv_catpvs( sv, " ()");
3159 sv_catpvn(sv, start, s-start);
3160 /* Use NUL as q''-delimiter. */
3161 sv_catpvs(sv, " split(/,/,q\0");
3163 sv_catpvn(sv, s, end - s);
3164 sv_catpvs(sv, "\0)");
3167 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3170 Perl_croak(aTHX_ "Missing argument to -%c", option);
3181 forbid_setid('s', FALSE);
3182 PL_doswitches = TRUE;
3196 PL_do_undump = TRUE;
3204 if (!sv_derived_from(PL_patchlevel, "version"))
3205 upg_version(PL_patchlevel, TRUE);
3208 SV* level= vstringify(PL_patchlevel);
3209 #ifdef PERL_PATCHNUM
3210 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3211 SV *num = newSVpvs(PERL_PATCHNUM "*");
3213 SV *num = newSVpvs(PERL_PATCHNUM);
3216 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3217 SvREFCNT_dec(level);
3220 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3224 PerlIO_printf(PerlIO_stdout(),
3225 "\nThis is perl, %"SVf
3226 " built for " ARCHNAME,
3228 SvREFCNT_dec(level);
3231 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3232 PerlIO_printf(PerlIO_stdout(),
3233 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3234 SVfARG(vstringify(PL_patchlevel))));
3235 PerlIO_printf(PerlIO_stdout(),
3236 Perl_form(aTHX_ " built under %s at %s %s\n",
3237 OSNAME, __DATE__, __TIME__));
3238 PerlIO_printf(PerlIO_stdout(),
3239 Perl_form(aTHX_ " OS Specific Release: %s\n",
3242 #if defined(LOCAL_PATCH_COUNT)
3243 if (LOCAL_PATCH_COUNT > 0)
3244 PerlIO_printf(PerlIO_stdout(),
3245 "\n(with %d registered patch%s, "
3246 "see perl -V for more detail)",
3248 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3251 PerlIO_printf(PerlIO_stdout(),
3252 "\n\nCopyright 1987-2009, Larry Wall\n");
3254 PerlIO_printf(PerlIO_stdout(),
3255 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3258 PerlIO_printf(PerlIO_stdout(),
3259 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3260 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3263 PerlIO_printf(PerlIO_stdout(),
3264 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3265 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3268 PerlIO_printf(PerlIO_stdout(),
3269 "atariST series port, ++jrb bammi@cadence.com\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3276 PerlIO_printf(PerlIO_stdout(),
3277 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3288 PerlIO_printf(PerlIO_stdout(),
3289 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3292 PerlIO_printf(PerlIO_stdout(),
3293 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3296 PerlIO_printf(PerlIO_stdout(),
3297 "EPOC port by Olaf Flebbe, 1999-2002\n");
3300 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3301 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3304 #ifdef __SYMBIAN32__
3305 PerlIO_printf(PerlIO_stdout(),
3306 "Symbian port by Nokia, 2004-2005\n");
3308 #ifdef BINARY_BUILD_NOTICE
3309 BINARY_BUILD_NOTICE;
3311 PerlIO_printf(PerlIO_stdout(),
3313 Perl may be copied only under the terms of either the Artistic License or the\n\
3314 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3315 Complete documentation for Perl, including FAQ lists, should be found on\n\
3316 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3317 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3320 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3321 PL_dowarn |= G_WARN_ON;
3326 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3327 if (!specialWARN(PL_compiling.cop_warnings))
3328 PerlMemShared_free(PL_compiling.cop_warnings);
3329 PL_compiling.cop_warnings = pWARN_ALL ;
3333 PL_dowarn = G_WARN_ALL_OFF;
3334 if (!specialWARN(PL_compiling.cop_warnings))
3335 PerlMemShared_free(PL_compiling.cop_warnings);
3336 PL_compiling.cop_warnings = pWARN_NONE ;
3343 if (s[0] == '-') /* Additional switches on #! line. */
3348 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3354 #ifdef ALTERNATE_SHEBANG
3355 case 'S': /* OS/2 needs -S on "extproc" line. */
3359 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3364 /* compliments of Tom Christiansen */
3366 /* unexec() can be found in the Gnu emacs distribution */
3367 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3370 Perl_my_unexec(pTHX)
3372 PERL_UNUSED_CONTEXT;
3374 SV * prog = newSVpv(BIN_EXP, 0);
3375 SV * file = newSVpv(PL_origfilename, 0);
3379 sv_catpvs(prog, "/perl");
3380 sv_catpvs(file, ".perldump");
3382 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3383 /* unexec prints msg to stderr in case of failure */
3384 PerlProc_exit(status);
3387 # include <lib$routines.h>
3388 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3389 # elif defined(WIN32) || defined(__CYGWIN__)
3390 Perl_croak(aTHX_ "dump is not supported");
3392 ABORT(); /* for use with undump */
3397 /* initialize curinterp */
3403 # define PERLVAR(var,type)
3404 # define PERLVARA(var,n,type)
3405 # if defined(PERL_IMPLICIT_CONTEXT)
3406 # define PERLVARI(var,type,init) aTHX->var = init;
3407 # define PERLVARIC(var,type,init) aTHX->var = init;
3409 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3410 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3412 # include "intrpvar.h"
3418 # define PERLVAR(var,type)
3419 # define PERLVARA(var,n,type)
3420 # define PERLVARI(var,type,init) PL_##var = init;
3421 # define PERLVARIC(var,type,init) PL_##var = init;
3422 # include "intrpvar.h"
3429 /* As these are inside a structure, PERLVARI isn't capable of initialising
3431 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3432 PL_reg_poscache = PL_reg_starttry = NULL;
3436 S_init_main_stash(pTHX)
3441 PL_curstash = PL_defstash = newHV();
3442 /* We know that the string "main" will be in the global shared string
3443 table, so it's a small saving to use it rather than allocate another
3445 PL_curstname = newSVpvs_share("main");
3446 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3447 /* If we hadn't caused another reference to "main" to be in the shared
3448 string table above, then it would be worth reordering these two,
3449 because otherwise all we do is delete "main" from it as a consequence
3450 of the SvREFCNT_dec, only to add it again with hv_name_set */
3451 SvREFCNT_dec(GvHV(gv));
3452 hv_name_set(PL_defstash, "main", 4, 0);
3453 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3455 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3457 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3458 GvMULTI_on(PL_incgv);
3459 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3460 GvMULTI_on(PL_hintgv);
3461 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3462 SvREFCNT_inc_simple_void(PL_defgv);
3463 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3464 SvREFCNT_inc_simple_void(PL_errgv);
3465 GvMULTI_on(PL_errgv);
3466 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3467 GvMULTI_on(PL_replgv);
3468 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3469 #ifdef PERL_DONT_CREATE_GVSV
3472 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3474 PL_curstash = PL_defstash;
3475 CopSTASH_set(&PL_compiling, PL_defstash);
3476 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3477 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3479 /* We must init $/ before switches are processed. */
3480 sv_setpvs(get_sv("/", GV_ADD), "\n");
3484 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3485 bool *suidscript, PerlIO **rsfpp)
3490 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3493 PL_origfilename = savepvs("-e");
3496 /* if find_script() returns, it returns a malloc()-ed value */
3497 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3499 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3500 const char *s = scriptname + 8;
3506 * Tell apart "normal" usage of fdscript, e.g.
3507 * with bash on FreeBSD:
3508 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3509 * from usage in suidperl.
3510 * Does any "normal" usage leave garbage after the number???
3511 * Is it a mistake to use a similar /dev/fd/ construct for
3516 * Be supersafe and do some sanity-checks.
3517 * Still, can we be sure we got the right thing?
3520 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3523 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3525 scriptname = savepv(s + 1);
3526 Safefree(PL_origfilename);
3527 PL_origfilename = (char *)scriptname;
3532 CopFILE_free(PL_curcop);
3533 CopFILE_set(PL_curcop, PL_origfilename);
3534 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3535 scriptname = (char *)"";
3536 if (fdscript >= 0) {
3537 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3538 # if defined(HAS_FCNTL) && defined(F_SETFD)
3540 /* ensure close-on-exec */
3541 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3544 else if (!*scriptname) {
3545 forbid_setid(0, *suidscript);
3546 *rsfpp = PerlIO_stdin();
3549 #ifdef FAKE_BIT_BUCKET
3550 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3551 * is called) and still have the "-e" work. (Believe it or not,
3552 * a /dev/null is required for the "-e" to work because source
3553 * filter magic is used to implement it. ) This is *not* a general
3554 * replacement for a /dev/null. What we do here is create a temp
3555 * file (an empty file), open up that as the script, and then
3556 * immediately close and unlink it. Close enough for jazz. */
3557 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3558 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3559 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3560 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3561 FAKE_BIT_BUCKET_TEMPLATE
3563 const char * const err = "Failed to create a fake bit bucket";
3564 if (strEQ(scriptname, BIT_BUCKET)) {
3565 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3566 int tmpfd = mkstemp(tmpname);
3568 scriptname = tmpname;
3571 Perl_croak(aTHX_ err);
3574 scriptname = mktemp(tmpname);
3576 Perl_croak(aTHX_ err);
3581 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3582 #ifdef FAKE_BIT_BUCKET
3583 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3584 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3585 && strlen(scriptname) == sizeof(tmpname) - 1) {
3588 scriptname = BIT_BUCKET;
3590 # if defined(HAS_FCNTL) && defined(F_SETFD)
3592 /* ensure close-on-exec */
3593 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3597 /* PSz 16 Sep 03 Keep neat error message */
3599 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3601 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3602 CopFILE(PL_curcop), Strerror(errno));
3608 * I_SYSSTATVFS HAS_FSTATVFS
3610 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3611 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3612 * here so that metaconfig picks them up. */
3615 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3616 /* Don't even need this function. */
3619 S_validate_suid(pTHX_ PerlIO *rsfp)
3621 PERL_ARGS_ASSERT_VALIDATE_SUID;
3623 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3626 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3627 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3629 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3632 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3633 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3634 /* not set-id, must be wrapped */
3637 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3640 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3644 register const char *s2;
3646 PERL_ARGS_ASSERT_FIND_BEGINNING;
3648 /* skip forward in input to the real script? */
3650 while (PL_doextract) {
3651 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3652 Perl_croak(aTHX_ "No Perl script found in input\n");
3654 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3655 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3656 PL_doextract = FALSE;
3657 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3659 while (*s == ' ' || *s == '\t') s++;
3661 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3662 || s2[-1] == '_') s2--;
3663 if (strnEQ(s2-4,"perl",4))
3664 while ((s = moreswitches(s)))
3676 PL_uid = PerlProc_getuid();
3677 PL_euid = PerlProc_geteuid();
3678 PL_gid = PerlProc_getgid();
3679 PL_egid = PerlProc_getegid();
3681 PL_uid |= PL_gid << 16;
3682 PL_euid |= PL_egid << 16;
3684 /* Should not happen: */
3685 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3686 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3689 * Should go by suidscript, not uid!=euid: why disallow
3690 * system("ls") in scripts run from setuid things?
3691 * Or, is this run before we check arguments and set suidscript?
3692 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3693 * (We never have suidscript, can we be sure to have fdscript?)
3694 * Or must then go by UID checks? See comments in forbid_setid also.
3698 /* This is used very early in the lifetime of the program,
3699 * before even the options are parsed, so PL_tainting has
3700 * not been initialized properly. */
3702 Perl_doing_taint(int argc, char *argv[], char *envp[])
3704 #ifndef PERL_IMPLICIT_SYS
3705 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3706 * before we have an interpreter-- and the whole point of this
3707 * function is to be called at such an early stage. If you are on
3708 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3709 * "tainted because running with altered effective ids', you'll
3710 * have to add your own checks somewhere in here. The two most
3711 * known samples of 'implicitness' are Win32 and NetWare, neither
3712 * of which has much of concept of 'uids'. */
3713 int uid = PerlProc_getuid();
3714 int euid = PerlProc_geteuid();
3715 int gid = PerlProc_getgid();
3716 int egid = PerlProc_getegid();
3723 if (uid && (euid != uid || egid != gid))
3725 #endif /* !PERL_IMPLICIT_SYS */
3726 /* This is a really primitive check; environment gets ignored only
3727 * if -T are the first chars together; otherwise one gets
3728 * "Too late" message. */
3729 if ( argc > 1 && argv[1][0] == '-'
3730 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3735 /* Passing the flag as a single char rather than a string is a slight space
3736 optimisation. The only message that isn't /^-.$/ is
3737 "program input from stdin", which is substituted in place of '\0', which
3738 could never be a command line flag. */
3740 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3743 char string[3] = "-x";
3744 const char *message = "program input from stdin";
3751 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3752 if (PL_euid != PL_uid)
3753 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3754 if (PL_egid != PL_gid)
3755 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3756 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3758 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3762 Perl_init_debugger(pTHX)
3765 HV * const ostash = PL_curstash;
3767 PL_curstash = PL_debstash;
3768 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3770 AvREAL_off(PL_dbargs);
3771 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3772 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3773 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3774 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3775 sv_setiv(PL_DBsingle, 0);
3776 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3777 sv_setiv(PL_DBtrace, 0);
3778 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3779 sv_setiv(PL_DBsignal, 0);
3780 PL_curstash = ostash;
3783 #ifndef STRESS_REALLOC
3784 #define REASONABLE(size) (size)
3786 #define REASONABLE(size) (1) /* unreasonable */
3790 Perl_init_stacks(pTHX)
3793 /* start with 128-item stack and 8K cxstack */
3794 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3795 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3796 PL_curstackinfo->si_type = PERLSI_MAIN;
3797 PL_curstack = PL_curstackinfo->si_stack;
3798 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3800 PL_stack_base = AvARRAY(PL_curstack);
3801 PL_stack_sp = PL_stack_base;
3802 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3804 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3807 PL_tmps_max = REASONABLE(128);
3809 Newx(PL_markstack,REASONABLE(32),I32);
3810 PL_markstack_ptr = PL_markstack;
3811 PL_markstack_max = PL_markstack + REASONABLE(32);
3815 Newx(PL_scopestack,REASONABLE(32),I32);
3816 PL_scopestack_ix = 0;
3817 PL_scopestack_max = REASONABLE(32);
3819 Newx(PL_savestack,REASONABLE(128),ANY);
3820 PL_savestack_ix = 0;
3821 PL_savestack_max = REASONABLE(128);
3830 while (PL_curstackinfo->si_next)
3831 PL_curstackinfo = PL_curstackinfo->si_next;
3832 while (PL_curstackinfo) {
3833 PERL_SI *p = PL_curstackinfo->si_prev;
3834 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3835 Safefree(PL_curstackinfo->si_cxstack);
3836 Safefree(PL_curstackinfo);
3837 PL_curstackinfo = p;
3839 Safefree(PL_tmps_stack);
3840 Safefree(PL_markstack);
3841 Safefree(PL_scopestack);
3842 Safefree(PL_savestack);
3847 S_init_predump_symbols(pTHX)
3853 sv_setpvs(get_sv("\"", GV_ADD), " ");
3854 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3856 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3857 GvMULTI_on(PL_stdingv);
3858 io = GvIOp(PL_stdingv);
3859 IoTYPE(io) = IoTYPE_RDONLY;
3860 IoIFP(io) = PerlIO_stdin();
3861 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3863 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3865 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3868 IoTYPE(io) = IoTYPE_WRONLY;
3869 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3871 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3873 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3875 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3876 GvMULTI_on(PL_stderrgv);
3877 io = GvIOp(PL_stderrgv);
3878 IoTYPE(io) = IoTYPE_WRONLY;
3879 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3880 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3882 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3884 PL_statname = newSV(0); /* last filename we did stat on */
3888 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3892 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3894 argc--,argv++; /* skip name of script */
3895 if (PL_doswitches) {
3896 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3900 if (argv[0][1] == '-' && !argv[0][2]) {
3904 if ((s = strchr(argv[0], '='))) {
3905 const char *const start_name = argv[0] + 1;
3906 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3907 TRUE, SVt_PV)), s + 1);
3910 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3913 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3914 GvMULTI_on(PL_argvgv);
3915 (void)gv_AVadd(PL_argvgv);
3916 av_clear(GvAVn(PL_argvgv));
3917 for (; argc > 0; argc--,argv++) {
3918 SV * const sv = newSVpv(argv[0],0);
3919 av_push(GvAVn(PL_argvgv),sv);
3920 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3921 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3924 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3925 (void)sv_utf8_decode(sv);
3931 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3936 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3938 PL_toptarget = newSV_type(SVt_PVFM);
3939 sv_setpvs(PL_toptarget, "");
3940 PL_bodytarget = newSV_type(SVt_PVFM);
3941 sv_setpvs(PL_bodytarget, "");
3942 PL_formtarget = PL_bodytarget;
3946 init_argv_symbols(argc,argv);
3948 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3949 sv_setpv(GvSV(tmpgv),PL_origfilename);
3951 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3953 bool env_is_not_environ;
3954 GvMULTI_on(PL_envgv);
3955 hv = GvHVn(PL_envgv);
3956 hv_magic(hv, NULL, PERL_MAGIC_env);
3958 #ifdef USE_ENVIRON_ARRAY
3959 /* Note that if the supplied env parameter is actually a copy
3960 of the global environ then it may now point to free'd memory
3961 if the environment has been modified since. To avoid this
3962 problem we treat env==NULL as meaning 'use the default'
3966 env_is_not_environ = env != environ;
3967 if (env_is_not_environ
3968 # ifdef USE_ITHREADS
3969 && PL_curinterp == aTHX
3978 for (; *env; env++) {
3981 if (!(s = strchr(old_var,'=')) || s == old_var)
3984 #if defined(MSDOS) && !defined(DJGPP)
3986 (void)strupr(old_var);
3989 sv = newSVpv(s+1, 0);
3990 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3991 if (env_is_not_environ)
3995 #endif /* USE_ENVIRON_ARRAY */
3996 #endif /* !PERL_MICRO */
3999 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4000 SvREADONLY_off(GvSV(tmpgv));
4001 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4002 SvREADONLY_on(GvSV(tmpgv));
4004 #ifdef THREADS_HAVE_PIDS
4005 PL_ppid = (IV)getppid();
4008 /* touch @F array to prevent spurious warnings 20020415 MJD */
4010 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4015 S_init_perllib(pTHX)
4019 const char *perl5lib = NULL;
4028 perl5lib = PerlEnv_getenv("PERL5LIB");
4030 * It isn't possible to delete an environment variable with
4031 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4032 * case we treat PERL5LIB as undefined if it has a zero-length value.
4034 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4035 if (perl5lib && *perl5lib != '\0')
4039 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4041 s = PerlEnv_getenv("PERLLIB");
4043 incpush_use_sep(s, 0, 0);
4046 /* Treat PERL5?LIB as a possible search list logical name -- the
4047 * "natural" VMS idiom for a Unix path string. We allow each
4048 * element to be a set of |-separated directories for compatibility.
4052 if (my_trnlnm("PERL5LIB",buf,0))
4054 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4055 } while (my_trnlnm("PERL5LIB",buf,++idx));
4057 while (my_trnlnm("PERLLIB",buf,idx++))
4058 incpush_use_sep(buf, 0, 0);
4063 #ifndef PERL_IS_MINIPERL
4064 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4065 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4067 /* Use the ~-expanded versions of APPLLIB (undocumented),
4068 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4071 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4072 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4076 /* sitearch is always relative to sitelib on Windows for
4077 * DLL-based path intuition to work correctly */
4078 # if !defined(WIN32)
4079 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4080 INCPUSH_CAN_RELOCATE);
4086 /* this picks up sitearch as well */
4087 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4089 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4091 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4095 #ifdef PERL_VENDORARCH_EXP
4096 /* vendorarch is always relative to vendorlib on Windows for
4097 * DLL-based path intuition to work correctly */
4098 # if !defined(WIN32)
4099 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4100 INCPUSH_CAN_RELOCATE);
4104 #ifdef PERL_VENDORLIB_EXP
4106 /* this picks up vendorarch as well */
4107 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4109 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4111 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4112 INCPUSH_CAN_RELOCATE);
4117 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4121 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4125 s = win32_get_privlib(PERL_FS_VERSION, &len);
4127 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4130 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4132 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4136 #ifdef PERL_OTHERLIBDIRS
4137 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4138 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4139 |INCPUSH_CAN_RELOCATE);
4145 * It isn't possible to delete an environment variable with
4146 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4147 * case we treat PERL5LIB as undefined if it has a zero-length value.
4149 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4150 if (perl5lib && *perl5lib != '\0')
4154 incpush_use_sep(perl5lib, 0,
4155 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4157 /* Treat PERL5?LIB as a possible search list logical name -- the
4158 * "natural" VMS idiom for a Unix path string. We allow each
4159 * element to be a set of |-separated directories for compatibility.
4163 if (my_trnlnm("PERL5LIB",buf,0))
4165 incpush_use_sep(buf, 0,
4166 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4167 } while (my_trnlnm("PERL5LIB",buf,++idx));
4171 /* Use the ~-expanded versions of APPLLIB (undocumented),
4172 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4175 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4176 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4179 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4180 /* Search for version-specific dirs below here */
4181 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4182 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4186 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4187 /* Search for version-specific dirs below here */
4188 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4189 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4192 #ifdef PERL_OTHERLIBDIRS
4193 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4194 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4195 |INCPUSH_CAN_RELOCATE);
4197 #endif /* !PERL_IS_MINIPERL */
4200 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4203 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4204 # define PERLLIB_SEP ';'
4207 # define PERLLIB_SEP '|'
4209 # define PERLLIB_SEP ':'
4212 #ifndef PERLLIB_MANGLE
4213 # define PERLLIB_MANGLE(s,n) (s)
4216 /* Push a directory onto @INC if it exists.
4217 Generate a new SV if we do this, to save needing to copy the SV we push
4220 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4225 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4227 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4228 S_ISDIR(tmpstatbuf.st_mode)) {
4230 dir = newSVsv(stem);
4232 /* Truncate dir back to stem. */
4233 SvCUR_set(dir, SvCUR(stem));
4239 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4242 const U8 using_sub_dirs
4243 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4244 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4245 const U8 add_versioned_sub_dirs
4246 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4247 const U8 add_archonly_sub_dirs
4248 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4249 #ifdef PERL_INC_VERSION_LIST
4250 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4252 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4253 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4254 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4255 AV *const inc = GvAVn(PL_incgv);
4257 PERL_ARGS_ASSERT_INCPUSH;
4260 /* Could remove this vestigial extra block, if we don't mind a lot of
4261 re-indenting diff noise. */
4264 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4265 arranged to unshift #! line -I onto the front of @INC. However,
4266 -I can add version and architecture specific libraries, and they
4267 need to go first. The old code assumed that it was always
4268 pushing. Hence to make it work, need to push the architecture
4269 (etc) libraries onto a temporary array, then "unshift" that onto
4270 the front of @INC. */
4271 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4274 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4275 defined to so something (in os2/os2.c), but the code has been
4276 this way, ignoring any possible changed of length, since
4277 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4279 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4281 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4284 /* Do the if() outside the #ifdef to avoid warnings about an unused
4287 #ifdef PERL_RELOCATABLE_INC
4289 * Relocatable include entries are marked with a leading .../
4292 * 0: Remove that leading ".../"
4293 * 1: Remove trailing executable name (anything after the last '/')
4294 * from the perl path to give a perl prefix
4296 * While the @INC element starts "../" and the prefix ends with a real
4297 * directory (ie not . or ..) chop that real directory off the prefix
4298 * and the leading "../" from the @INC element. ie a logical "../"
4300 * Finally concatenate the prefix and the remainder of the @INC element
4301 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4302 * generates /usr/local/lib/perl5
4304 const char *libpath = SvPVX(libdir);
4305 STRLEN libpath_len = SvCUR(libdir);
4306 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4308 SV * const caret_X = get_sv("\030", 0);
4309 /* Going to use the SV just as a scratch buffer holding a C
4315 /* $^X is *the* source of taint if tainting is on, hence
4316 SvPOK() won't be true. */
4318 assert(SvPOKp(caret_X));
4319 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4321 /* Firstly take off the leading .../
4322 If all else fail we'll do the paths relative to the current
4324 sv_chop(libdir, libpath + 4);
4325 /* Don't use SvPV as we're intentionally bypassing taining,
4326 mortal copies that the mg_get of tainting creates, and
4327 corruption that seems to come via the save stack.
4328 I guess that the save stack isn't correctly set up yet. */
4329 libpath = SvPVX(libdir);
4330 libpath_len = SvCUR(libdir);
4332 /* This would work more efficiently with memrchr, but as it's
4333 only a GNU extension we'd need to probe for it and
4334 implement our own. Not hard, but maybe not worth it? */
4336 prefix = SvPVX(prefix_sv);
4337 lastslash = strrchr(prefix, '/');
4339 /* First time in with the *lastslash = '\0' we just wipe off
4340 the trailing /perl from (say) /usr/foo/bin/perl
4344 while ((*lastslash = '\0'), /* Do that, come what may. */
4345 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4346 && (lastslash = strrchr(prefix, '/')))) {
4347 if (lastslash[1] == '\0'
4348 || (lastslash[1] == '.'
4349 && (lastslash[2] == '/' /* ends "/." */
4350 || (lastslash[2] == '/'
4351 && lastslash[3] == '/' /* or "/.." */
4353 /* Prefix ends "/" or "/." or "/..", any of which
4354 are fishy, so don't do any more logical cleanup.
4358 /* Remove leading "../" from path */
4361 /* Next iteration round the loop removes the last
4362 directory name from prefix by writing a '\0' in
4363 the while clause. */
4365 /* prefix has been terminated with a '\0' to the correct
4366 length. libpath points somewhere into the libdir SV.
4367 We need to join the 2 with '/' and drop the result into
4369 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4370 SvREFCNT_dec(libdir);
4371 /* And this is the new libdir. */
4374 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4375 /* Need to taint reloccated paths if running set ID */
4376 SvTAINTED_on(libdir);
4379 SvREFCNT_dec(prefix_sv);
4384 * BEFORE pushing libdir onto @INC we may first push version- and
4385 * archname-specific sub-directories.
4387 if (using_sub_dirs) {
4389 #ifdef PERL_INC_VERSION_LIST
4390 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4391 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4392 const char * const *incver;
4399 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4401 while (unix[len-1] == '/') len--; /* Cosmetic */
4402 sv_usepvn(libdir,unix,len);
4405 PerlIO_printf(Perl_error_log,
4406 "Failed to unixify @INC element \"%s\"\n",
4410 subdir = newSVsv(libdir);
4412 if (add_versioned_sub_dirs) {
4413 /* .../version/archname if -d .../version/archname */
4414 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4415 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4417 /* .../version if -d .../version */
4418 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4419 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4422 #ifdef PERL_INC_VERSION_LIST
4424 for (incver = incverlist; *incver; incver++) {
4425 /* .../xxx if -d .../xxx */
4426 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4427 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4432 if (add_archonly_sub_dirs) {
4433 /* .../archname if -d .../archname */
4434 sv_catpvs(subdir, "/" ARCHNAME);
4435 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4439 assert (SvREFCNT(subdir) == 1);
4440 SvREFCNT_dec(subdir);
4443 /* finally add this lib directory at the end of @INC */
4445 U32 extra = av_len(av) + 1;
4446 av_unshift(inc, extra + push_basedir);
4448 av_store(inc, extra, libdir);
4450 /* av owns a reference, av_store() expects to be donated a
4451 reference, and av expects to be sane when it's cleared.
4452 If I wanted to be naughty and wrong, I could peek inside the
4453 implementation of av_clear(), realise that it uses
4454 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4455 and so directly steal from it (with a memcpy() to inc, and
4456 then memset() to NULL them out. But people copy code from the
4457 core expecting it to be best practise, so let's use the API.
4458 Although studious readers will note that I'm not checking any
4460 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4464 else if (push_basedir) {
4465 av_push(inc, libdir);
4468 if (!push_basedir) {
4469 assert (SvREFCNT(libdir) == 1);
4470 SvREFCNT_dec(libdir);
4476 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4480 /* This logic has been broken out from S_incpush(). It may be possible to
4483 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4490 /* Break at all separators */
4491 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4493 /* skip any consecutive separators */
4495 /* Uncomment the next line for PATH semantics */
4496 /* But you'll need to write tests */
4497 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4499 incpush(p, (STRLEN)(s - p), flags);
4504 incpush(p, (STRLEN)(end - p), flags);
4509 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4513 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4519 PERL_ARGS_ASSERT_CALL_LIST;
4521 while (av_len(paramList) >= 0) {
4522 cv = MUTABLE_CV(av_shift(paramList));
4524 if (paramList == PL_beginav) {
4525 /* save PL_beginav for compiler */
4526 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4528 else if (paramList == PL_checkav) {
4529 /* save PL_checkav for compiler */
4530 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4532 else if (paramList == PL_unitcheckav) {
4533 /* save PL_unitcheckav for compiler */
4534 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4545 PL_madskills |= 16384;
4550 PL_madskills &= ~16384;
4553 (void)SvPV_const(atsv, len);
4555 PL_curcop = &PL_compiling;
4556 CopLINE_set(PL_curcop, oldline);
4557 if (paramList == PL_beginav)
4558 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4560 Perl_sv_catpvf(aTHX_ atsv,
4561 "%s failed--call queue aborted",
4562 paramList == PL_checkav ? "CHECK"
4563 : paramList == PL_initav ? "INIT"
4564 : paramList == PL_unitcheckav ? "UNITCHECK"
4566 while (PL_scopestack_ix > oldscope)
4569 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4576 /* my_exit() was called */
4577 while (PL_scopestack_ix > oldscope)
4580 PL_curstash = PL_defstash;
4581 PL_curcop = &PL_compiling;
4582 CopLINE_set(PL_curcop, oldline);
4584 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4585 if (paramList == PL_beginav)
4586 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4588 Perl_croak(aTHX_ "%s failed--call queue aborted",
4589 paramList == PL_checkav ? "CHECK"
4590 : paramList == PL_initav ? "INIT"
4591 : paramList == PL_unitcheckav ? "UNITCHECK"
4598 PL_curcop = &PL_compiling;
4599 CopLINE_set(PL_curcop, oldline);
4602 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4611 Perl_my_exit(pTHX_ U32 status)
4622 STATUS_EXIT_SET(status);
4629 Perl_my_failure_exit(pTHX)
4633 /* We have been called to fall on our sword. The desired exit code
4634 * should be already set in STATUS_UNIX, but could be shifted over
4635 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4638 * If an error code has not been set, then force the issue.
4640 if (MY_POSIX_EXIT) {
4642 /* According to the die_exit.t tests, if errno is non-zero */
4643 /* It should be used for the error status. */
4645 if (errno == EVMSERR) {
4646 STATUS_NATIVE = vaxc$errno;
4649 /* According to die_exit.t tests, if the child_exit code is */
4650 /* also zero, then we need to exit with a code of 255 */
4651 if ((errno != 0) && (errno < 256))
4652 STATUS_UNIX_EXIT_SET(errno);
4653 else if (STATUS_UNIX < 255) {
4654 STATUS_UNIX_EXIT_SET(255);
4659 /* The exit code could have been set by $? or vmsish which
4660 * means that it may not have fatal set. So convert
4661 * success/warning codes to fatal with out changing
4662 * the POSIX status code. The severity makes VMS native
4663 * status handling work, while UNIX mode programs use the
4664 * the POSIX exit codes.
4666 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4667 STATUS_NATIVE &= STS$M_COND_ID;
4668 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4672 /* Traditionally Perl on VMS always expects a Fatal Error. */
4673 if (vaxc$errno & 1) {
4675 /* So force success status to failure */
4676 if (STATUS_NATIVE & 1)
4681 STATUS_UNIX = EINTR; /* In case something cares */
4686 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4688 /* Encode the severity code */
4689 severity = STATUS_NATIVE & STS$M_SEVERITY;
4690 STATUS_UNIX = (severity ? severity : 1) << 8;
4692 /* Perl expects this to be a fatal error */
4693 if (severity != STS$K_SEVERE)
4702 STATUS_UNIX_SET(errno);
4704 exitstatus = STATUS_UNIX >> 8;
4705 if (exitstatus & 255)
4706 STATUS_UNIX_SET(exitstatus);
4708 STATUS_UNIX_SET(255);
4715 S_my_exit_jump(pTHX)
4720 SvREFCNT_dec(PL_e_script);
4724 POPSTACK_TO(PL_mainstack);
4732 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4735 const char * const p = SvPVX_const(PL_e_script);
4736 const char *nl = strchr(p, '\n');
4738 PERL_UNUSED_ARG(idx);
4739 PERL_UNUSED_ARG(maxlen);
4741 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4743 filter_del(read_e_script);
4746 sv_catpvn(buf_sv, p, nl-p);
4747 sv_chop(PL_e_script, nl);
4753 * c-indentation-style: bsd
4755 * indent-tabs-mode: t
4758 * ex: set ts=8 sts=4 sw=4 noet: