3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 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/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
113 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
114 char *getenv (char *); /* Usually in <stdlib.h> */
117 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
125 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
132 S_init_tls_and_interp(PerlInterpreter *my_perl)
136 PERL_SET_INTERP(my_perl);
137 #if defined(USE_ITHREADS)
140 PERL_SET_THX(my_perl);
142 MUTEX_INIT(&PL_dollarzero_mutex);
146 PERL_SET_THX(my_perl);
150 #ifdef PERL_IMPLICIT_SYS
152 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
153 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
154 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
155 struct IPerlDir* ipD, struct IPerlSock* ipS,
156 struct IPerlProc* ipP)
158 PerlInterpreter *my_perl;
159 /* New() needs interpreter, so call malloc() instead */
160 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
161 S_init_tls_and_interp(my_perl);
162 Zero(my_perl, 1, PerlInterpreter);
178 =head1 Embedding Functions
180 =for apidoc perl_alloc
182 Allocates a new Perl interpreter. See L<perlembed>.
190 PerlInterpreter *my_perl;
192 /* New() needs interpreter, so call malloc() instead */
193 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
195 S_init_tls_and_interp(my_perl);
196 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
198 #endif /* PERL_IMPLICIT_SYS */
201 =for apidoc perl_construct
203 Initializes a new Perl interpreter. See L<perlembed>.
209 perl_construct(pTHXx)
214 PL_perl_destruct_level = 1;
216 if (PL_perl_destruct_level > 0)
219 /* Init the real globals (and main thread)? */
221 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
223 PL_linestr = NEWSV(65,79);
224 sv_upgrade(PL_linestr,SVt_PVIV);
226 if (!SvREADONLY(&PL_sv_undef)) {
227 /* set read-only and try to insure than we wont see REFCNT==0
230 SvREADONLY_on(&PL_sv_undef);
231 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
233 sv_setpv(&PL_sv_no,PL_No);
234 /* value lookup in void context - happens to have the side effect
235 of caching the numeric forms. */
238 SvREADONLY_on(&PL_sv_no);
239 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
241 sv_setpv(&PL_sv_yes,PL_Yes);
244 SvREADONLY_on(&PL_sv_yes);
245 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
247 SvREADONLY_on(&PL_sv_placeholder);
248 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
251 PL_sighandlerp = Perl_sighandler;
252 PL_pidstatus = newHV();
255 PL_rs = newSVpvn("\n", 1);
260 PL_lex_state = LEX_NOTPARSING;
266 SET_NUMERIC_STANDARD();
268 #if defined(LOCAL_PATCH_COUNT)
269 PL_localpatches = local_patches; /* For possible -v */
272 #ifdef HAVE_INTERP_INTERN
276 PerlIO_init(aTHX); /* Hook to IO system */
278 PL_fdpid = newAV(); /* for remembering popen pids by fd */
279 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
280 PL_errors = newSVpvn("",0);
281 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
282 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
283 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
285 PL_regex_padav = newAV();
286 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
287 PL_regex_pad = AvARRAY(PL_regex_padav);
289 #ifdef USE_REENTRANT_API
290 Perl_reentrant_init(aTHX);
293 /* Note that strtab is a rather special HV. Assumptions are made
294 about not iterating on it, and not adding tie magic to it.
295 It is properly deallocated in perl_destruct() */
298 HvSHAREKEYS_off(PL_strtab); /* mandatory */
299 hv_ksplit(PL_strtab, 512);
301 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
302 _dyld_lookup_and_bind
303 ("__environ", (unsigned long *) &environ_pointer, NULL);
307 # ifdef USE_ENVIRON_ARRAY
308 PL_origenviron = environ;
312 /* Use sysconf(_SC_CLK_TCK) if available, if not
313 * available or if the sysconf() fails, use the HZ.
314 * BeOS has those, but returns the wrong value.
315 * The HZ if not originally defined has been by now
316 * been defined as CLK_TCK, if available. */
317 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
318 PL_clocktick = sysconf(_SC_CLK_TCK);
319 if (PL_clocktick <= 0)
323 PL_stashcache = newHV();
325 PL_patchlevel = newSVpv(
326 Perl_form(aTHX_ "%d.%d.%d",
329 (int)PERL_SUBVERSION ), 0
333 if (!PL_mmap_page_size) {
334 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
336 SETERRNO(0, SS_NORMAL);
338 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
340 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
342 if ((long) PL_mmap_page_size < 0) {
345 (void) SvUPGRADE(error, SVt_PV);
346 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
349 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
353 # ifdef HAS_GETPAGESIZE
354 PL_mmap_page_size = getpagesize();
356 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
357 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
361 if (PL_mmap_page_size <= 0)
362 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
363 (IV) PL_mmap_page_size);
365 #endif /* HAS_MMAP */
367 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
368 PL_timesbase.tms_utime = 0;
369 PL_timesbase.tms_stime = 0;
370 PL_timesbase.tms_cutime = 0;
371 PL_timesbase.tms_cstime = 0;
378 =for apidoc nothreadhook
380 Stub that provides thread hook for perl_destruct when there are
387 Perl_nothreadhook(pTHX)
393 =for apidoc perl_destruct
395 Shuts down a Perl interpreter. See L<perlembed>.
404 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
406 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
411 /* wait for all pseudo-forked children to finish */
412 PERL_WAIT_FOR_CHILDREN;
414 destruct_level = PL_perl_destruct_level;
418 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
419 const int i = atoi(s);
420 if (destruct_level < i)
426 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
432 if (PL_endav && !PL_minus_c)
433 call_list(PL_scopestack_ix, PL_endav);
439 /* Need to flush since END blocks can produce output */
442 if (CALL_FPTR(PL_threadhook)(aTHX)) {
443 /* Threads hook has vetoed further cleanup */
444 return STATUS_NATIVE_EXPORT;
447 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
448 if (destruct_level != 0) {
449 /* Fork here to create a child. Our child's job is to preserve the
450 state of scalars prior to destruction, so that we can instruct it
451 to dump any scalars that we later find have leaked.
452 There's no subtlety in this code - it assumes POSIX, and it doesn't
456 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
457 perror("Debug leaking scalars socketpair failed");
463 perror("Debug leaking scalars fork failed");
467 /* We are the child */
473 ssize_t got = read(sock, &target, sizeof(target));
478 perror("Debug leaking scalars child read failed");
481 if(got < sizeof(target)) {
482 perror("Debug leaking scalars child short read");
486 PerlIO_flush(Perl_debug_log);
488 /* Write something back as synchronisation. */
489 got = write(sock, &target, sizeof(target));
492 perror("Debug leaking scalars child write failed");
495 if(got < sizeof(target)) {
496 perror("Debug leaking scalars child short write");
507 /* We must account for everything. */
509 /* Destroy the main CV and syntax tree */
511 /* ensure comppad/curpad to refer to main's pad */
512 if (CvPADLIST(PL_main_cv)) {
513 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
515 op_free(PL_main_root);
516 PL_main_root = Nullop;
518 PL_curcop = &PL_compiling;
519 PL_main_start = Nullop;
520 SvREFCNT_dec(PL_main_cv);
524 /* Tell PerlIO we are about to tear things apart in case
525 we have layers which are using resources that should
529 PerlIO_destruct(aTHX);
531 if (PL_sv_objcount) {
533 * Try to destruct global references. We do this first so that the
534 * destructors and destructees still exist. Some sv's might remain.
535 * Non-referenced objects are on their own.
541 /* unhook hooks which will soon be, or use, destroyed data */
542 SvREFCNT_dec(PL_warnhook);
543 PL_warnhook = Nullsv;
544 SvREFCNT_dec(PL_diehook);
547 /* call exit list functions */
548 while (PL_exitlistlen-- > 0)
549 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
551 Safefree(PL_exitlist);
556 if (destruct_level == 0){
558 DEBUG_P(debprofdump());
560 #if defined(PERLIO_LAYERS)
561 /* No more IO - including error messages ! */
562 PerlIO_cleanup(aTHX);
565 /* The exit() function will do everything that needs doing. */
566 return STATUS_NATIVE_EXPORT;
569 /* jettison our possibly duplicated environment */
570 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
571 * so we certainly shouldn't free it here
574 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
575 if (environ != PL_origenviron && !PL_use_safe_putenv
577 /* only main thread can free environ[0] contents */
578 && PL_curinterp == aTHX
584 for (i = 0; environ[i]; i++)
585 safesysfree(environ[i]);
587 /* Must use safesysfree() when working with environ. */
588 safesysfree(environ);
590 environ = PL_origenviron;
593 #endif /* !PERL_MICRO */
595 /* reset so print() ends up where we expect */
599 /* the syntax tree is shared between clones
600 * so op_free(PL_main_root) only ReREFCNT_dec's
601 * REGEXPs in the parent interpreter
602 * we need to manually ReREFCNT_dec for the clones
605 I32 i = AvFILLp(PL_regex_padav) + 1;
606 SV **ary = AvARRAY(PL_regex_padav);
611 if (SvFLAGS(resv) & SVf_BREAK) {
612 /* this is PL_reg_curpm, already freed
613 * flag is set in regexec.c:S_regtry
615 SvFLAGS(resv) &= ~SVf_BREAK;
617 else if(SvREPADTMP(resv)) {
618 SvREPADTMP_off(resv);
620 else if(SvIOKp(resv)) {
621 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
626 SvREFCNT_dec(PL_regex_padav);
627 PL_regex_padav = Nullav;
631 SvREFCNT_dec((SV*) PL_stashcache);
632 PL_stashcache = NULL;
634 /* loosen bonds of global variables */
637 (void)PerlIO_close(PL_rsfp);
641 /* Filters for program text */
642 SvREFCNT_dec(PL_rsfp_filters);
643 PL_rsfp_filters = Nullav;
646 PL_preprocess = FALSE;
652 PL_doswitches = FALSE;
653 PL_dowarn = G_WARN_OFF;
654 PL_doextract = FALSE;
655 PL_sawampersand = FALSE; /* must save all match strings */
658 Safefree(PL_inplace);
660 SvREFCNT_dec(PL_patchlevel);
663 SvREFCNT_dec(PL_e_script);
664 PL_e_script = Nullsv;
669 /* magical thingies */
671 SvREFCNT_dec(PL_ofs_sv); /* $, */
674 SvREFCNT_dec(PL_ors_sv); /* $\ */
677 SvREFCNT_dec(PL_rs); /* $/ */
680 PL_multiline = 0; /* $* */
681 Safefree(PL_osname); /* $^O */
684 SvREFCNT_dec(PL_statname);
685 PL_statname = Nullsv;
688 /* defgv, aka *_ should be taken care of elsewhere */
690 /* clean up after study() */
691 SvREFCNT_dec(PL_lastscream);
692 PL_lastscream = Nullsv;
693 Safefree(PL_screamfirst);
695 Safefree(PL_screamnext);
699 Safefree(PL_efloatbuf);
700 PL_efloatbuf = Nullch;
703 /* startup and shutdown function lists */
704 SvREFCNT_dec(PL_beginav);
705 SvREFCNT_dec(PL_beginav_save);
706 SvREFCNT_dec(PL_endav);
707 SvREFCNT_dec(PL_checkav);
708 SvREFCNT_dec(PL_checkav_save);
709 SvREFCNT_dec(PL_initav);
711 PL_beginav_save = Nullav;
714 PL_checkav_save = Nullav;
717 /* shortcuts just get cleared */
723 PL_argvoutgv = Nullgv;
725 PL_stderrgv = Nullgv;
726 PL_last_in_gv = Nullgv;
731 PL_DBsingle = Nullsv;
733 PL_DBsignal = Nullsv;
734 PL_DBassertion = Nullsv;
737 PL_debstash = Nullhv;
739 SvREFCNT_dec(PL_argvout_stack);
740 PL_argvout_stack = Nullav;
742 SvREFCNT_dec(PL_modglobal);
743 PL_modglobal = Nullhv;
744 SvREFCNT_dec(PL_preambleav);
745 PL_preambleav = Nullav;
746 SvREFCNT_dec(PL_subname);
748 SvREFCNT_dec(PL_linestr);
750 SvREFCNT_dec(PL_pidstatus);
751 PL_pidstatus = Nullhv;
752 SvREFCNT_dec(PL_toptarget);
753 PL_toptarget = Nullsv;
754 SvREFCNT_dec(PL_bodytarget);
755 PL_bodytarget = Nullsv;
756 PL_formtarget = Nullsv;
758 /* free locale stuff */
759 #ifdef USE_LOCALE_COLLATE
760 Safefree(PL_collation_name);
761 PL_collation_name = Nullch;
764 #ifdef USE_LOCALE_NUMERIC
765 Safefree(PL_numeric_name);
766 PL_numeric_name = Nullch;
767 SvREFCNT_dec(PL_numeric_radix_sv);
768 PL_numeric_radix_sv = Nullsv;
771 /* clear utf8 character classes */
772 SvREFCNT_dec(PL_utf8_alnum);
773 SvREFCNT_dec(PL_utf8_alnumc);
774 SvREFCNT_dec(PL_utf8_ascii);
775 SvREFCNT_dec(PL_utf8_alpha);
776 SvREFCNT_dec(PL_utf8_space);
777 SvREFCNT_dec(PL_utf8_cntrl);
778 SvREFCNT_dec(PL_utf8_graph);
779 SvREFCNT_dec(PL_utf8_digit);
780 SvREFCNT_dec(PL_utf8_upper);
781 SvREFCNT_dec(PL_utf8_lower);
782 SvREFCNT_dec(PL_utf8_print);
783 SvREFCNT_dec(PL_utf8_punct);
784 SvREFCNT_dec(PL_utf8_xdigit);
785 SvREFCNT_dec(PL_utf8_mark);
786 SvREFCNT_dec(PL_utf8_toupper);
787 SvREFCNT_dec(PL_utf8_totitle);
788 SvREFCNT_dec(PL_utf8_tolower);
789 SvREFCNT_dec(PL_utf8_tofold);
790 SvREFCNT_dec(PL_utf8_idstart);
791 SvREFCNT_dec(PL_utf8_idcont);
792 PL_utf8_alnum = Nullsv;
793 PL_utf8_alnumc = Nullsv;
794 PL_utf8_ascii = Nullsv;
795 PL_utf8_alpha = Nullsv;
796 PL_utf8_space = Nullsv;
797 PL_utf8_cntrl = Nullsv;
798 PL_utf8_graph = Nullsv;
799 PL_utf8_digit = Nullsv;
800 PL_utf8_upper = Nullsv;
801 PL_utf8_lower = Nullsv;
802 PL_utf8_print = Nullsv;
803 PL_utf8_punct = Nullsv;
804 PL_utf8_xdigit = Nullsv;
805 PL_utf8_mark = Nullsv;
806 PL_utf8_toupper = Nullsv;
807 PL_utf8_totitle = Nullsv;
808 PL_utf8_tolower = Nullsv;
809 PL_utf8_tofold = Nullsv;
810 PL_utf8_idstart = Nullsv;
811 PL_utf8_idcont = Nullsv;
813 if (!specialWARN(PL_compiling.cop_warnings))
814 SvREFCNT_dec(PL_compiling.cop_warnings);
815 PL_compiling.cop_warnings = Nullsv;
816 if (!specialCopIO(PL_compiling.cop_io))
817 SvREFCNT_dec(PL_compiling.cop_io);
818 PL_compiling.cop_io = Nullsv;
819 CopFILE_free(&PL_compiling);
820 CopSTASH_free(&PL_compiling);
822 /* Prepare to destruct main symbol table. */
827 SvREFCNT_dec(PL_curstname);
828 PL_curstname = Nullsv;
830 /* clear queued errors */
831 SvREFCNT_dec(PL_errors);
835 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
836 if (PL_scopestack_ix != 0)
837 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
838 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
839 (long)PL_scopestack_ix);
840 if (PL_savestack_ix != 0)
841 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
842 "Unbalanced saves: %ld more saves than restores\n",
843 (long)PL_savestack_ix);
844 if (PL_tmps_floor != -1)
845 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
846 (long)PL_tmps_floor + 1);
847 if (cxstack_ix != -1)
848 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
849 (long)cxstack_ix + 1);
852 /* Now absolutely destruct everything, somehow or other, loops or no. */
853 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
854 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
856 /* the 2 is for PL_fdpid and PL_strtab */
857 while (PL_sv_count > 2 && sv_clean_all())
860 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
861 SvFLAGS(PL_fdpid) |= SVt_PVAV;
862 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
863 SvFLAGS(PL_strtab) |= SVt_PVHV;
865 AvREAL_off(PL_fdpid); /* no surviving entries */
866 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
869 #ifdef HAVE_INTERP_INTERN
873 /* Destruct the global string table. */
875 /* Yell and reset the HeVAL() slots that are still holding refcounts,
876 * so that sv_free() won't fail on them.
877 * Now that the global string table is using a single hunk of memory
878 * for both HE and HEK, we either need to explicitly unshare it the
879 * correct way, or actually free things here.
882 const I32 max = HvMAX(PL_strtab);
883 HE **array = HvARRAY(PL_strtab);
887 if (hent && ckWARN_d(WARN_INTERNAL)) {
888 HE *next = HeNEXT(hent);
889 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
890 "Unbalanced string table refcount: (%d) for \"%s\"",
891 HeVAL(hent) - Nullsv, HeKEY(hent));
903 HvARRAY(PL_strtab) = 0;
904 HvTOTALKEYS(PL_strtab) = 0;
905 HvFILL(PL_strtab) = 0;
907 SvREFCNT_dec(PL_strtab);
910 /* free the pointer tables used for cloning */
911 ptr_table_free(PL_ptr_table);
912 PL_ptr_table = (PTR_TBL_t*)NULL;
915 /* free special SVs */
917 SvREFCNT(&PL_sv_yes) = 0;
918 sv_clear(&PL_sv_yes);
919 SvANY(&PL_sv_yes) = NULL;
920 SvFLAGS(&PL_sv_yes) = 0;
922 SvREFCNT(&PL_sv_no) = 0;
924 SvANY(&PL_sv_no) = NULL;
925 SvFLAGS(&PL_sv_no) = 0;
929 for (i=0; i<=2; i++) {
930 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
931 sv_clear(PERL_DEBUG_PAD(i));
932 SvANY(PERL_DEBUG_PAD(i)) = NULL;
933 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
937 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
938 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
940 #ifdef DEBUG_LEAKING_SCALARS
941 if (PL_sv_count != 0) {
946 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
947 svend = &sva[SvREFCNT(sva)];
948 for (sv = sva + 1; sv < svend; ++sv) {
949 if (SvTYPE(sv) != SVTYPEMASK) {
950 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
955 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
957 " refcnt=%"UVuf pTHX__FORMAT "\n"
958 "\tallocated at %s:%d %s %s%s\n",
959 sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
960 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
962 sv->sv_debug_inpad ? "for" : "by",
963 sv->sv_debug_optype ?
964 PL_op_name[sv->sv_debug_optype]: "(none)",
965 sv->sv_debug_cloned ? " (cloned)" : ""
968 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
969 PerlIO_flush(Perl_debug_log);
971 got = write(sock, &sv, sizeof(sv));
974 perror("Debug leaking scalars parent write failed");
977 if(got < sizeof(target)) {
978 perror("Debug leaking scalars parent short write");
982 got = read(sock, &target, sizeof(target));
985 perror("Debug leaking scalars parent read failed");
988 if(got < sizeof(target)) {
989 perror("Debug leaking scalars parent short read");
997 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1001 /* Wait for up to 4 seconds for child to terminate.
1002 This seems to be the least effort way of timing out on reaping
1004 struct timeval waitfor = {4, 0};
1008 FD_SET(sock, &rset);
1009 select(sock + 1, &rset, NULL, NULL, &waitfor);
1010 waitpid(child, &status, WNOHANG);
1018 #if defined(PERLIO_LAYERS)
1019 /* No more IO - including error messages ! */
1020 PerlIO_cleanup(aTHX);
1023 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1024 as currently layers use it rather than Nullsv as a marker
1025 for no arg - and will try and SvREFCNT_dec it.
1027 SvREFCNT(&PL_sv_undef) = 0;
1028 SvREADONLY_off(&PL_sv_undef);
1030 Safefree(PL_origfilename);
1031 PL_origfilename = Nullch;
1032 Safefree(PL_reg_start_tmp);
1033 PL_reg_start_tmp = (char**)NULL;
1034 PL_reg_start_tmpl = 0;
1036 Safefree(PL_reg_curpm);
1037 Safefree(PL_reg_poscache);
1038 free_tied_hv_pool();
1039 Safefree(PL_op_mask);
1040 Safefree(PL_psig_ptr);
1041 PL_psig_ptr = (SV**)NULL;
1042 Safefree(PL_psig_name);
1043 PL_psig_name = (SV**)NULL;
1044 Safefree(PL_bitcount);
1045 PL_bitcount = Nullch;
1046 Safefree(PL_psig_pend);
1047 PL_psig_pend = (int*)NULL;
1048 PL_formfeed = Nullsv;
1050 PL_tainting = FALSE;
1051 PL_taint_warn = FALSE;
1052 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1055 DEBUG_P(debprofdump());
1057 #ifdef USE_REENTRANT_API
1058 Perl_reentrant_free(aTHX);
1063 /* As the absolutely last thing, free the non-arena SV for mess() */
1066 /* we know that type == SVt_PVMG */
1068 /* it could have accumulated taint magic */
1071 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1072 moremagic = mg->mg_moremagic;
1073 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1075 Safefree(mg->mg_ptr);
1079 /* we know that type >= SVt_PV */
1080 SvPV_free(PL_mess_sv);
1081 Safefree(SvANY(PL_mess_sv));
1082 Safefree(PL_mess_sv);
1083 PL_mess_sv = Nullsv;
1085 return STATUS_NATIVE_EXPORT;
1089 =for apidoc perl_free
1091 Releases a Perl interpreter. See L<perlembed>.
1099 #if defined(WIN32) || defined(NETWARE)
1100 # if defined(PERL_IMPLICIT_SYS)
1102 void *host = nw_internal_host;
1104 void *host = w32_internal_host;
1106 PerlMem_free(aTHXx);
1108 nw_delete_internal_host(host);
1110 win32_delete_internal_host(host);
1113 PerlMem_free(aTHXx);
1116 PerlMem_free(aTHXx);
1120 #if defined(USE_5005THREADS) || defined(USE_ITHREADS)
1121 /* provide destructors to clean up the thread key when libperl is unloaded */
1122 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1124 #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__)
1125 #pragma fini "perl_fini"
1129 #if defined(__GNUC__)
1130 __attribute__((destructor))
1140 #endif /* THREADS */
1143 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1145 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1146 PL_exitlist[PL_exitlistlen].fn = fn;
1147 PL_exitlist[PL_exitlistlen].ptr = ptr;
1151 #ifdef HAS_PROCSELFEXE
1152 /* This is a function so that we don't hold on to MAXPATHLEN
1153 bytes of stack longer than necessary
1156 S_procself_val(pTHX_ SV *sv, const char *arg0)
1158 char buf[MAXPATHLEN];
1159 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1161 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1162 includes a spurious NUL which will cause $^X to fail in system
1163 or backticks (this will prevent extensions from being built and
1164 many tests from working). readlink is not meant to add a NUL.
1165 Normal readlink works fine.
1167 if (len > 0 && buf[len-1] == '\0') {
1171 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1172 returning the text "unknown" from the readlink rather than the path
1173 to the executable (or returning an error from the readlink). Any valid
1174 path has a '/' in it somewhere, so use that to validate the result.
1175 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1177 if (len > 0 && memchr(buf, '/', len)) {
1178 sv_setpvn(sv,buf,len);
1184 #endif /* HAS_PROCSELFEXE */
1187 S_set_caret_X(pTHX) {
1188 GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */
1190 #ifdef HAS_PROCSELFEXE
1191 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1194 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
1196 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
1203 =for apidoc perl_parse
1205 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1211 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1218 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1221 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1222 setuid perl scripts securely.\n");
1223 #endif /* IAMSUID */
1226 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1227 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1228 * This MUST be done before any hash stores or fetches take place.
1229 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1230 * yourself, it is your responsibility to provide a good random seed!
1231 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1232 if (!PL_rehash_seed_set)
1233 PL_rehash_seed = get_hash_seed();
1235 const char *s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1237 if (s && (atoi(s) == 1))
1238 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1240 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1246 /* Set PL_origalen be the sum of the contiguous argv[]
1247 * elements plus the size of the env in case that it is
1248 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1249 * as the maximum modifiable length of $0. In the worst case
1250 * the area we are able to modify is limited to the size of
1251 * the original argv[0]. (See below for 'contiguous', though.)
1253 const char *s = NULL;
1256 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1257 /* Do the mask check only if the args seem like aligned. */
1259 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1261 /* See if all the arguments are contiguous in memory. Note
1262 * that 'contiguous' is a loose term because some platforms
1263 * align the argv[] and the envp[]. If the arguments look
1264 * like non-aligned, assume that they are 'strictly' or
1265 * 'traditionally' contiguous. If the arguments look like
1266 * aligned, we just check that they are within aligned
1267 * PTRSIZE bytes. As long as no system has something bizarre
1268 * like the argv[] interleaved with some other data, we are
1269 * fine. (Did I just evoke Murphy's Law?) --jhi */
1270 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1272 for (i = 1; i < PL_origargc; i++) {
1273 if ((PL_origargv[i] == s + 1
1275 || PL_origargv[i] == s + 2
1280 (PL_origargv[i] > s &&
1282 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1292 /* Can we grab env area too to be used as the area for $0? */
1293 if (PL_origenviron) {
1294 if ((PL_origenviron[0] == s + 1
1296 || (PL_origenviron[0] == s + 9 && (s += 8))
1301 (PL_origenviron[0] > s &&
1302 PL_origenviron[0] <=
1303 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1307 s = PL_origenviron[0];
1310 my_setenv("NoNe SuCh", Nullch);
1311 /* Force copy of environment. */
1312 for (i = 1; PL_origenviron[i]; i++) {
1313 if (PL_origenviron[i] == s + 1
1316 (PL_origenviron[i] > s &&
1317 PL_origenviron[i] <=
1318 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1321 s = PL_origenviron[i];
1329 PL_origalen = s - PL_origargv[0] + 1;
1334 /* Come here if running an undumped a.out. */
1336 PL_origfilename = savepv(argv[0]);
1337 PL_do_undump = FALSE;
1338 cxstack_ix = -1; /* start label stack again */
1340 assert (!PL_tainted);
1342 S_set_caret_X(aTHX);
1344 init_postdump_symbols(argc,argv,env);
1349 op_free(PL_main_root);
1350 PL_main_root = Nullop;
1352 PL_main_start = Nullop;
1353 SvREFCNT_dec(PL_main_cv);
1354 PL_main_cv = Nullcv;
1357 oldscope = PL_scopestack_ix;
1358 PL_dowarn = G_WARN_OFF;
1363 parse_body(env,xsinit);
1365 call_list(oldscope, PL_checkav);
1372 /* my_exit() was called */
1373 while (PL_scopestack_ix > oldscope)
1376 PL_curstash = PL_defstash;
1378 call_list(oldscope, PL_checkav);
1379 ret = STATUS_NATIVE_EXPORT;
1382 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1391 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1394 int argc = PL_origargc;
1395 char **argv = PL_origargv;
1396 const char *scriptname = NULL;
1397 VOL bool dosearch = FALSE;
1398 const char *validarg = "";
1401 const char *cddir = Nullch;
1402 #ifdef USE_SITECUSTOMIZE
1403 bool minus_f = FALSE;
1408 sv_setpvn(PL_linestr,"",0);
1409 sv = newSVpvn("",0); /* first used for -I flags */
1413 for (argc--,argv++; argc > 0; argc--,argv++) {
1414 if (argv[0][0] != '-' || !argv[0][1])
1418 validarg = " PHOOEY ";
1422 * Can we rely on the kernel to start scripts with argv[1] set to
1423 * contain all #! line switches (the whole line)? (argv[0] is set to
1424 * the interpreter name, argv[2] to the script name; argv[3] and
1425 * above may contain other arguments.)
1432 #ifndef PERL_STRICT_CR
1457 if ((s = moreswitches(s)))
1462 CHECK_MALLOC_TOO_LATE_FOR('t');
1463 if( !PL_tainting ) {
1464 PL_taint_warn = TRUE;
1470 CHECK_MALLOC_TOO_LATE_FOR('T');
1472 PL_taint_warn = FALSE;
1477 #ifdef MACOS_TRADITIONAL
1478 /* ignore -e for Dev:Pseudo argument */
1479 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1484 PL_e_script = newSVpvn("",0);
1485 filter_add(read_e_script, NULL);
1488 sv_catpv(PL_e_script, s);
1490 sv_catpv(PL_e_script, argv[1]);
1494 Perl_croak(aTHX_ "No code specified for -e");
1495 sv_catpv(PL_e_script, "\n");
1499 #ifdef USE_SITECUSTOMIZE
1505 case 'I': /* -I handled both here and in moreswitches() */
1507 if (!*++s && (s=argv[1]) != Nullch) {
1512 STRLEN len = strlen(s);
1513 p = savepvn(s, len);
1514 incpush(p, TRUE, TRUE, FALSE, FALSE);
1515 sv_catpvn(sv, "-I", 2);
1516 sv_catpvn(sv, p, len);
1517 sv_catpvn(sv, " ", 1);
1521 Perl_croak(aTHX_ "No directory specified for -I");
1525 PL_preprocess = TRUE;
1535 PL_preambleav = newAV();
1536 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
1540 PL_Sv = newSVpv("print myconfig();",0);
1542 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
1544 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
1546 opts = SvCUR(PL_Sv);
1548 sv_catpv(PL_Sv,"\" Compile-time options:");
1550 sv_catpv(PL_Sv," DEBUGGING");
1552 # ifdef MULTIPLICITY
1553 sv_catpv(PL_Sv," MULTIPLICITY");
1555 # ifdef USE_5005THREADS
1556 sv_catpv(PL_Sv," USE_5005THREADS");
1558 # ifdef USE_ITHREADS
1559 sv_catpv(PL_Sv," USE_ITHREADS");
1561 # ifdef USE_64_BIT_INT
1562 sv_catpv(PL_Sv," USE_64_BIT_INT");
1564 # ifdef USE_64_BIT_ALL
1565 sv_catpv(PL_Sv," USE_64_BIT_ALL");
1567 # ifdef USE_LONG_DOUBLE
1568 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1570 # ifdef USE_LARGE_FILES
1571 sv_catpv(PL_Sv," USE_LARGE_FILES");
1574 sv_catpv(PL_Sv," USE_SOCKS");
1576 # ifdef USE_SITECUSTOMIZE
1577 sv_catpv(PL_Sv," USE_SITECUSTOMIZE");
1579 # ifdef PERL_IMPLICIT_CONTEXT
1580 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1582 # ifdef PERL_IMPLICIT_SYS
1583 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1586 while (SvCUR(PL_Sv) > opts+76) {
1587 /* find last space after "options: " and before col 76 */
1590 char *pv = SvPV_nolen(PL_Sv);
1591 const char c = pv[opts+76];
1593 space = strrchr(pv+opts+26, ' ');
1595 if (!space) break; /* "Can't happen" */
1597 /* break the line before that space */
1600 sv_insert(PL_Sv, opts, 0,
1604 sv_catpv(PL_Sv,"\\n\",");
1606 #if defined(LOCAL_PATCH_COUNT)
1607 if (LOCAL_PATCH_COUNT > 0) {
1609 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
1610 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1611 if (PL_localpatches[i])
1612 Perl_sv_catpvf(aTHX_ PL_Sv,"q%c\t%s\n%c,",
1613 0, PL_localpatches[i], 0);
1617 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
1620 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
1622 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
1625 sv_catpv(PL_Sv, "; \
1627 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1630 push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1633 print \" \\%ENV:\\n @env\\n\" if @env; \
1634 print \" \\@INC:\\n @INC\\n\";");
1637 PL_Sv = newSVpv("config_vars(qw(",0);
1638 sv_catpv(PL_Sv, ++s);
1639 sv_catpv(PL_Sv, "))");
1642 av_push(PL_preambleav, PL_Sv);
1643 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1646 PL_doextract = TRUE;
1654 if (!*++s || isSPACE(*s)) {
1658 /* catch use of gnu style long options */
1659 if (strEQ(s, "version")) {
1663 if (strEQ(s, "help")) {
1670 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1676 #ifndef SECURE_INTERNAL_GETENV
1679 (s = PerlEnv_getenv("PERL5OPT")))
1681 const char *popt = s;
1684 if (*s == '-' && *(s+1) == 'T') {
1685 CHECK_MALLOC_TOO_LATE_FOR('T');
1687 PL_taint_warn = FALSE;
1690 char *popt_copy = Nullch;
1703 if (!strchr("DIMUdmtwA", *s))
1704 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1708 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1709 s = popt_copy + (s - popt);
1710 d = popt_copy + (d - popt);
1717 if( !PL_tainting ) {
1718 PL_taint_warn = TRUE;
1728 #ifdef USE_SITECUSTOMIZE
1731 PL_preambleav = newAV();
1732 av_unshift(PL_preambleav, 1);
1733 (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1737 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1738 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1742 scriptname = argv[0];
1745 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1747 else if (scriptname == Nullch) {
1749 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1755 /* Set $^X early so that it can be used for relocatable paths in @INC */
1756 assert (!PL_tainted);
1758 S_set_caret_X(aTHX);
1762 open_script(scriptname,dosearch,sv);
1764 validate_suid(validarg, scriptname);
1767 #if defined(SIGCHLD) || defined(SIGCLD)
1770 # define SIGCHLD SIGCLD
1772 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1773 if (sigstate == SIG_IGN) {
1774 if (ckWARN(WARN_SIGNAL))
1775 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1776 "Can't ignore signal CHLD, forcing to default");
1777 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1783 #ifdef MACOS_TRADITIONAL
1784 if (PL_doextract || gMacPerl_AlwaysExtract) {
1789 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
1790 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1794 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1795 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1796 CvUNIQUE_on(PL_compcv);
1798 CvPADLIST(PL_compcv) = pad_new(0);
1799 #ifdef USE_5005THREADS
1800 CvOWNER(PL_compcv) = 0;
1801 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1802 MUTEX_INIT(CvMUTEXP(PL_compcv));
1803 #endif /* USE_5005THREADS */
1806 boot_core_UNIVERSAL();
1807 boot_core_xsutils();
1810 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
1812 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
1818 # ifdef HAS_SOCKS5_INIT
1819 socks5_init(argv[0]);
1825 init_predump_symbols();
1826 /* init_postdump_symbols not currently designed to be called */
1827 /* more than once (ENV isn't cleared first, for example) */
1828 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
1830 init_postdump_symbols(argc,argv,env);
1832 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
1833 * or explicitly in some platforms.
1834 * locale.c:Perl_init_i18nl10n() if the environment
1835 * look like the user wants to use UTF-8. */
1836 #if defined(SYMBIAN)
1837 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
1840 /* Requires init_predump_symbols(). */
1841 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
1846 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
1847 * and the default open disciplines. */
1848 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
1849 PL_stdingv && (io = GvIO(PL_stdingv)) &&
1851 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1852 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
1853 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
1855 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1856 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
1857 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
1859 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1860 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
1861 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1862 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
1863 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
1866 sv_setpvn(sv, ":utf8\0:utf8", 11);
1868 sv_setpvn(sv, ":utf8\0", 6);
1871 sv_setpvn(sv, "\0:utf8", 6);
1877 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
1878 if (strEQ(s, "unsafe"))
1879 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
1880 else if (strEQ(s, "safe"))
1881 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
1883 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
1888 /* now parse the script */
1890 SETERRNO(0,SS_NORMAL);
1892 #ifdef MACOS_TRADITIONAL
1893 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1895 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1897 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1898 MacPerl_MPWFileName(PL_origfilename));
1902 if (yyparse() || PL_error_count) {
1904 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
1906 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1911 CopLINE_set(PL_curcop, 0);
1912 PL_curstash = PL_defstash;
1913 PL_preprocess = FALSE;
1915 SvREFCNT_dec(PL_e_script);
1916 PL_e_script = Nullsv;
1923 SAVECOPFILE(PL_curcop);
1924 SAVECOPLINE(PL_curcop);
1925 gv_check(PL_defstash);
1932 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1933 dump_mstats("after compilation:");
1942 =for apidoc perl_run
1944 Tells a Perl interpreter to run. See L<perlembed>.
1956 oldscope = PL_scopestack_ix;
1964 cxstack_ix = -1; /* start context stack again */
1966 case 0: /* normal completion */
1970 case 2: /* my_exit() */
1971 while (PL_scopestack_ix > oldscope)
1974 PL_curstash = PL_defstash;
1975 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
1976 PL_endav && !PL_minus_c)
1977 call_list(oldscope, PL_endav);
1979 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1980 dump_mstats("after execution: ");
1982 ret = STATUS_NATIVE_EXPORT;
1986 POPSTACK_TO(PL_mainstack);
1989 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2001 S_run_body(pTHX_ I32 oldscope)
2003 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2004 PL_sawampersand ? "Enabling" : "Omitting"));
2006 if (!PL_restartop) {
2007 DEBUG_x(dump_all());
2009 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2010 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2014 #ifdef MACOS_TRADITIONAL
2015 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2016 (gMacPerl_ErrorFormat ? "# " : ""),
2017 MacPerl_MPWFileName(PL_origfilename));
2019 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2023 if (PERLDB_SINGLE && PL_DBsingle)
2024 sv_setiv(PL_DBsingle, 1);
2026 call_list(oldscope, PL_initav);
2032 PL_op = PL_restartop;
2036 else if (PL_main_start) {
2037 CvDEPTH(PL_main_cv) = 1;
2038 PL_op = PL_main_start;
2046 =head1 SV Manipulation Functions
2048 =for apidoc p||get_sv
2050 Returns the SV of the specified Perl scalar. If C<create> is set and the
2051 Perl variable does not exist then it will be created. If C<create> is not
2052 set and the variable does not exist then NULL is returned.
2058 Perl_get_sv(pTHX_ const char *name, I32 create)
2061 #ifdef USE_5005THREADS
2062 if (name[1] == '\0' && !isALPHA(name[0])) {
2063 PADOFFSET tmp = find_threadsv(name);
2064 if (tmp != NOT_IN_PAD)
2065 return THREADSV(tmp);
2067 #endif /* USE_5005THREADS */
2068 gv = gv_fetchpv(name, create, SVt_PV);
2075 =head1 Array Manipulation Functions
2077 =for apidoc p||get_av
2079 Returns the AV of the specified Perl array. If C<create> is set and the
2080 Perl variable does not exist then it will be created. If C<create> is not
2081 set and the variable does not exist then NULL is returned.
2087 Perl_get_av(pTHX_ const char *name, I32 create)
2089 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
2098 =head1 Hash Manipulation Functions
2100 =for apidoc p||get_hv
2102 Returns the HV of the specified Perl hash. If C<create> is set and the
2103 Perl variable does not exist then it will be created. If C<create> is not
2104 set and the variable does not exist then NULL is returned.
2110 Perl_get_hv(pTHX_ const char *name, I32 create)
2112 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
2121 =head1 CV Manipulation Functions
2123 =for apidoc p||get_cv
2125 Returns the CV of the specified Perl subroutine. If C<create> is set and
2126 the Perl subroutine does not exist then it will be declared (which has the
2127 same effect as saying C<sub name;>). If C<create> is not set and the
2128 subroutine does not exist then NULL is returned.
2134 Perl_get_cv(pTHX_ const char *name, I32 create)
2136 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
2137 /* XXX unsafe for threads if eval_owner isn't held */
2138 /* XXX this is probably not what they think they're getting.
2139 * It has the same effect as "sub name;", i.e. just a forward
2141 if (create && !GvCVu(gv))
2142 return newSUB(start_subparse(FALSE, 0),
2143 newSVOP(OP_CONST, 0, newSVpv(name,0)),
2151 /* Be sure to refetch the stack pointer after calling these routines. */
2155 =head1 Callback Functions
2157 =for apidoc p||call_argv
2159 Performs a callback to the specified Perl sub. See L<perlcall>.
2165 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2167 /* See G_* flags in cop.h */
2168 /* null terminated arg list */
2175 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2180 return call_pv(sub_name, flags);
2184 =for apidoc p||call_pv
2186 Performs a callback to the specified Perl sub. See L<perlcall>.
2192 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2193 /* name of the subroutine */
2194 /* See G_* flags in cop.h */
2196 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2200 =for apidoc p||call_method
2202 Performs a callback to the specified Perl method. The blessed object must
2203 be on the stack. See L<perlcall>.
2209 Perl_call_method(pTHX_ const char *methname, I32 flags)
2210 /* name of the subroutine */
2211 /* See G_* flags in cop.h */
2213 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2216 /* May be called with any of a CV, a GV, or an SV containing the name. */
2218 =for apidoc p||call_sv
2220 Performs a callback to the Perl sub whose name is in the SV. See
2227 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2228 /* See G_* flags in cop.h */
2231 LOGOP myop; /* fake syntax tree node */
2234 volatile I32 retval = 0;
2236 bool oldcatch = CATCH_GET;
2241 if (flags & G_DISCARD) {
2246 Zero(&myop, 1, LOGOP);
2247 myop.op_next = Nullop;
2248 if (!(flags & G_NOARGS))
2249 myop.op_flags |= OPf_STACKED;
2250 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2251 (flags & G_ARRAY) ? OPf_WANT_LIST :
2256 EXTEND(PL_stack_sp, 1);
2257 *++PL_stack_sp = sv;
2259 oldscope = PL_scopestack_ix;
2261 if (PERLDB_SUB && PL_curstash != PL_debstash
2262 /* Handle first BEGIN of -d. */
2263 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2264 /* Try harder, since this may have been a sighandler, thus
2265 * curstash may be meaningless. */
2266 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2267 && !(flags & G_NODEBUG))
2268 PL_op->op_private |= OPpENTERSUB_DB;
2270 if (flags & G_METHOD) {
2271 Zero(&method_op, 1, UNOP);
2272 method_op.op_next = PL_op;
2273 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2274 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2275 PL_op = (OP*)&method_op;
2278 if (!(flags & G_EVAL)) {
2280 call_body((OP*)&myop, FALSE);
2281 retval = PL_stack_sp - (PL_stack_base + oldmark);
2282 CATCH_SET(oldcatch);
2285 myop.op_other = (OP*)&myop;
2287 /* we're trying to emulate pp_entertry() here */
2289 register PERL_CONTEXT *cx;
2290 const I32 gimme = GIMME_V;
2295 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2297 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2299 PL_in_eval = EVAL_INEVAL;
2300 if (flags & G_KEEPERR)
2301 PL_in_eval |= EVAL_KEEPERR;
2303 sv_setpvn(ERRSV,"",0);
2311 call_body((OP*)&myop, FALSE);
2312 retval = PL_stack_sp - (PL_stack_base + oldmark);
2313 if (!(flags & G_KEEPERR))
2314 sv_setpvn(ERRSV,"",0);
2320 /* my_exit() was called */
2321 PL_curstash = PL_defstash;
2324 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2325 Perl_croak(aTHX_ "Callback called exit");
2330 PL_op = PL_restartop;
2334 PL_stack_sp = PL_stack_base + oldmark;
2335 if (flags & G_ARRAY)
2339 *++PL_stack_sp = &PL_sv_undef;
2344 if (PL_scopestack_ix > oldscope) {
2348 register PERL_CONTEXT *cx;
2359 if (flags & G_DISCARD) {
2360 PL_stack_sp = PL_stack_base + oldmark;
2370 S_call_body(pTHX_ const OP *myop, bool is_eval)
2372 if (PL_op == myop) {
2374 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2376 PL_op = Perl_pp_entersub(aTHX); /* this does */
2382 /* Eval a string. The G_EVAL flag is always assumed. */
2385 =for apidoc p||eval_sv
2387 Tells Perl to C<eval> the string in the SV.
2393 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2395 /* See G_* flags in cop.h */
2398 UNOP myop; /* fake syntax tree node */
2399 volatile I32 oldmark = SP - PL_stack_base;
2400 volatile I32 retval = 0;
2405 if (flags & G_DISCARD) {
2412 Zero(PL_op, 1, UNOP);
2413 EXTEND(PL_stack_sp, 1);
2414 *++PL_stack_sp = sv;
2416 if (!(flags & G_NOARGS))
2417 myop.op_flags = OPf_STACKED;
2418 myop.op_next = Nullop;
2419 myop.op_type = OP_ENTEREVAL;
2420 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2421 (flags & G_ARRAY) ? OPf_WANT_LIST :
2423 if (flags & G_KEEPERR)
2424 myop.op_flags |= OPf_SPECIAL;
2426 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2427 * before a PUSHEVAL, which corrupts the stack after a croak */
2428 TAINT_PROPER("eval_sv()");
2434 call_body((OP*)&myop,TRUE);
2435 retval = PL_stack_sp - (PL_stack_base + oldmark);
2436 if (!(flags & G_KEEPERR))
2437 sv_setpvn(ERRSV,"",0);
2443 /* my_exit() was called */
2444 PL_curstash = PL_defstash;
2447 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2448 Perl_croak(aTHX_ "Callback called exit");
2453 PL_op = PL_restartop;
2457 PL_stack_sp = PL_stack_base + oldmark;
2458 if (flags & G_ARRAY)
2462 *++PL_stack_sp = &PL_sv_undef;
2468 if (flags & G_DISCARD) {
2469 PL_stack_sp = PL_stack_base + oldmark;
2479 =for apidoc p||eval_pv
2481 Tells Perl to C<eval> the given string and return an SV* result.
2487 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2490 SV* sv = newSVpv(p, 0);
2492 eval_sv(sv, G_SCALAR);
2499 if (croak_on_error && SvTRUE(ERRSV)) {
2500 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2506 /* Require a module. */
2509 =head1 Embedding Functions
2511 =for apidoc p||require_pv
2513 Tells Perl to C<require> the file named by the string argument. It is
2514 analogous to the Perl code C<eval "require '$file'">. It's even
2515 implemented that way; consider using load_module instead.
2520 Perl_require_pv(pTHX_ const char *pv)
2524 PUSHSTACKi(PERLSI_REQUIRE);
2526 sv = sv_newmortal();
2527 sv_setpv(sv, "require '");
2530 eval_sv(sv, G_DISCARD);
2536 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2540 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
2541 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2545 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2547 /* This message really ought to be max 23 lines.
2548 * Removed -h because the user already knows that option. Others? */
2550 static const char * const usage_msg[] = {
2551 "-0[octal] specify record separator (\\0, if no argument)",
2552 "-A[mod][=pattern] activate all/given assertions",
2553 "-a autosplit mode with -n or -p (splits $_ into @F)",
2554 "-C[number/list] enables the listed Unicode features",
2555 "-c check syntax only (runs BEGIN and CHECK blocks)",
2556 "-d[:debugger] run program under debugger",
2557 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2558 "-e program one line of program (several -e's allowed, omit programfile)",
2559 "-f don't do $sitelib/sitecustomize.pl at startup",
2560 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2561 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2562 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2563 "-l[octal] enable line ending processing, specifies line terminator",
2564 "-[mM][-]module execute \"use/no module...\" before executing program",
2565 "-n assume \"while (<>) { ... }\" loop around program",
2566 "-p assume loop like -n but print line also, like sed",
2567 "-P run program through C preprocessor before compilation",
2568 "-s enable rudimentary parsing for switches after programfile",
2569 "-S look for programfile using PATH environment variable",
2570 "-t enable tainting warnings",
2571 "-T enable tainting checks",
2572 "-u dump core after parsing program",
2573 "-U allow unsafe operations",
2574 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2575 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2576 "-w enable many useful warnings (RECOMMENDED)",
2577 "-W enable all warnings",
2578 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2579 "-X disable all warnings",
2583 const char * const *p = usage_msg;
2585 PerlIO_printf(PerlIO_stdout(),
2586 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2589 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2592 /* convert a string of -D options (or digits) into an int.
2593 * sets *s to point to the char after the options */
2597 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2599 static const char * const usage_msgd[] = {
2600 " Debugging flag values: (see also -d)",
2601 " p Tokenizing and parsing (with v, displays parse stack)",
2602 " s Stack snapshots (with v, displays all stacks)",
2603 " l Context (loop) stack processing",
2604 " t Trace execution",
2605 " o Method and overloading resolution",
2606 " c String/numeric conversions",
2607 " P Print profiling info, preprocessor command for -P, source file input state",
2608 " m Memory allocation",
2609 " f Format processing",
2610 " r Regular expression parsing and execution",
2611 " x Syntax tree dump",
2612 " u Tainting checks",
2613 " H Hash dump -- usurps values()",
2614 " X Scratchpad allocation",
2616 " S Thread synchronization",
2618 " R Include reference counts of dumped variables (eg when using -Ds)",
2619 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2620 " v Verbose: use in conjunction with other flags",
2622 " A Consistency checks on internal structures",
2623 " q quiet - currently only suppresses the 'EXECUTING' message",
2628 /* if adding extra options, remember to update DEBUG_MASK */
2629 static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2631 for (; isALNUM(**s); (*s)++) {
2632 const char *d = strchr(debopts,**s);
2634 i |= 1 << (d - debopts);
2635 else if (ckWARN_d(WARN_DEBUGGING))
2636 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2637 "invalid option -D%c, use -D'' to see choices\n", **s);
2640 else if (isDIGIT(**s)) {
2642 for (; isALNUM(**s); (*s)++) ;
2644 else if (givehelp) {
2645 char **p = (char **)usage_msgd;
2646 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2649 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2650 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2651 "-Dp not implemented on this platform\n");
2657 /* This routine handles any switches that can be given during run */
2660 Perl_moreswitches(pTHX_ char *s)
2671 SvREFCNT_dec(PL_rs);
2672 if (s[1] == 'x' && s[2]) {
2673 const char *e = s+=2;
2679 flags = PERL_SCAN_SILENT_ILLDIGIT;
2680 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2681 if (s + numlen < e) {
2682 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2686 PL_rs = newSVpvn("", 0);
2687 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2688 tmps = (U8*)SvPVX(PL_rs);
2689 uvchr_to_utf8(tmps, rschar);
2690 SvCUR_set(PL_rs, UNISKIP(rschar));
2695 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2696 if (rschar & ~((U8)~0))
2697 PL_rs = &PL_sv_undef;
2698 else if (!rschar && numlen >= 2)
2699 PL_rs = newSVpvn("", 0);
2701 char ch = (char)rschar;
2702 PL_rs = newSVpvn(&ch, 1);
2705 sv_setsv(get_sv("/", TRUE), PL_rs);
2710 PL_unicode = parse_unicode_opts( (const char **)&s );
2715 while (*s && !isSPACE(*s)) ++s;
2717 PL_splitstr = savepv(PL_splitstr);
2731 /* -dt indicates to the debugger that threads will be used */
2732 if (*s == 't' && !isALNUM(s[1])) {
2734 my_setenv("PERL5DB_THREADED", "1");
2737 /* The following permits -d:Mod to accepts arguments following an =
2738 in the fashion that -MSome::Mod does. */
2739 if (*s == ':' || *s == '=') {
2742 sv = newSVpv("use Devel::", 0);
2744 /* We now allow -d:Module=Foo,Bar */
2745 while(isALNUM(*s) || *s==':') ++s;
2747 sv_catpv(sv, start);
2749 sv_catpvn(sv, start, s-start);
2750 sv_catpv(sv, " split(/,/,q{");
2755 my_setenv("PERL5DB", SvPV(sv, PL_na));
2758 PL_perldb = PERLDB_ALL;
2767 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
2768 #else /* !DEBUGGING */
2769 if (ckWARN_d(WARN_DEBUGGING))
2770 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2771 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
2772 for (s++; isALNUM(*s); s++) ;
2777 usage(PL_origargv[0]);
2781 Safefree(PL_inplace);
2782 #if defined(__CYGWIN__) /* do backup extension automagically */
2783 if (*(s+1) == '\0') {
2784 PL_inplace = savepv(".bak");
2787 #endif /* __CYGWIN__ */
2788 PL_inplace = savepv(s+1);
2789 for (s = PL_inplace; *s && !isSPACE(*s); s++)
2793 if (*s == '-') /* Additional switches on #! line. */
2797 case 'I': /* -I handled both here and in parse_body() */
2800 while (*s && isSPACE(*s))
2805 /* ignore trailing spaces (possibly followed by other switches) */
2807 for (e = p; *e && !isSPACE(*e); e++) ;
2811 } while (*p && *p != '-');
2812 e = savepvn(s, e-s);
2813 incpush(e, TRUE, TRUE, FALSE, FALSE);
2820 Perl_croak(aTHX_ "No directory specified for -I");
2826 SvREFCNT_dec(PL_ors_sv);
2832 PL_ors_sv = newSVpvn("\n",1);
2833 numlen = 3 + (*s == '0');
2834 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
2838 if (RsPARA(PL_rs)) {
2839 PL_ors_sv = newSVpvn("\n\n",2);
2842 PL_ors_sv = newSVsv(PL_rs);
2849 PL_preambleav = newAV();
2853 SV *sv = newSVpv("use assertions::activate", 24);
2854 while(isALNUM(*s) || *s == ':') ++s;
2856 sv_catpvn(sv, "::", 2);
2857 sv_catpvn(sv, start, s-start);
2860 sv_catpvn(sv, " split(/,/,q\0", 13);
2862 sv_catpvn(sv, "\0)", 2);
2865 else if (*s != '\0') {
2866 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, s-start, start);
2868 av_push(PL_preambleav, sv);
2872 forbid_setid("-M"); /* XXX ? */
2875 forbid_setid("-m"); /* XXX ? */
2879 const char *use = "use ";
2880 /* -M-foo == 'no foo' */
2881 if (*s == '-') { use = "no "; ++s; }
2882 sv = newSVpv(use,0);
2884 /* We allow -M'Module qw(Foo Bar)' */
2885 while(isALNUM(*s) || *s==':') ++s;
2887 sv_catpv(sv, start);
2888 if (*(start-1) == 'm') {
2890 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
2891 sv_catpv( sv, " ()");
2895 Perl_croak(aTHX_ "Module name required with -%c option",
2897 sv_catpvn(sv, start, s-start);
2898 sv_catpv(sv, " split(/,/,q");
2899 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
2901 sv_catpvn(sv, "\0)", 2);
2905 PL_preambleav = newAV();
2906 av_push(PL_preambleav, sv);
2909 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
2921 PL_doswitches = TRUE;
2935 #ifdef MACOS_TRADITIONAL
2936 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2938 PL_do_undump = TRUE;
2946 if (!sv_derived_from(PL_patchlevel, "version"))
2947 (void *)upg_version(PL_patchlevel);
2949 PerlIO_printf(PerlIO_stdout(),
2950 Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s",
2951 vstringify(PL_patchlevel),
2954 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2955 PerlIO_printf(PerlIO_stdout(),
2956 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
2957 vstringify(PL_patchlevel)));
2958 PerlIO_printf(PerlIO_stdout(),
2959 Perl_form(aTHX_ " built under %s at %s %s\n",
2960 OSNAME, __DATE__, __TIME__));
2961 PerlIO_printf(PerlIO_stdout(),
2962 Perl_form(aTHX_ " OS Specific Release: %s\n",
2966 #if defined(LOCAL_PATCH_COUNT)
2967 if (LOCAL_PATCH_COUNT > 0)
2968 PerlIO_printf(PerlIO_stdout(),
2969 "\n(with %d registered patch%s, "
2970 "see perl -V for more detail)",
2971 (int)LOCAL_PATCH_COUNT,
2972 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
2975 PerlIO_printf(PerlIO_stdout(),
2976 "\n\nCopyright 1987-2005, Larry Wall\n");
2977 #ifdef MACOS_TRADITIONAL
2978 PerlIO_printf(PerlIO_stdout(),
2979 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
2980 "maintained by Chris Nandor\n");
2983 PerlIO_printf(PerlIO_stdout(),
2984 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
2987 PerlIO_printf(PerlIO_stdout(),
2988 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2989 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
2992 PerlIO_printf(PerlIO_stdout(),
2993 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2994 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
2997 PerlIO_printf(PerlIO_stdout(),
2998 "atariST series port, ++jrb bammi@cadence.com\n");
3001 PerlIO_printf(PerlIO_stdout(),
3002 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3005 PerlIO_printf(PerlIO_stdout(),
3006 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3009 PerlIO_printf(PerlIO_stdout(),
3010 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3013 PerlIO_printf(PerlIO_stdout(),
3014 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3017 PerlIO_printf(PerlIO_stdout(),
3018 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3021 PerlIO_printf(PerlIO_stdout(),
3022 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3025 PerlIO_printf(PerlIO_stdout(),
3026 "MiNT port by Guido Flohr, 1997-1999\n");
3029 PerlIO_printf(PerlIO_stdout(),
3030 "EPOC port by Olaf Flebbe, 1999-2002\n");
3033 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3034 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3038 PerlIO_printf(PerlIO_stdout(),
3039 "Symbian port by Nokia, 2004-2005\n");
3041 #ifdef BINARY_BUILD_NOTICE
3042 BINARY_BUILD_NOTICE;
3044 PerlIO_printf(PerlIO_stdout(),
3046 Perl may be copied only under the terms of either the Artistic License or the\n\
3047 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3048 Complete documentation for Perl, including FAQ lists, should be found on\n\
3049 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3050 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3053 if (! (PL_dowarn & G_WARN_ALL_MASK))
3054 PL_dowarn |= G_WARN_ON;
3058 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3059 if (!specialWARN(PL_compiling.cop_warnings))
3060 SvREFCNT_dec(PL_compiling.cop_warnings);
3061 PL_compiling.cop_warnings = pWARN_ALL ;
3065 PL_dowarn = G_WARN_ALL_OFF;
3066 if (!specialWARN(PL_compiling.cop_warnings))
3067 SvREFCNT_dec(PL_compiling.cop_warnings);
3068 PL_compiling.cop_warnings = pWARN_NONE ;
3073 if (s[1] == '-') /* Additional switches on #! line. */
3078 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3084 #ifdef ALTERNATE_SHEBANG
3085 case 'S': /* OS/2 needs -S on "extproc" line. */
3093 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3098 /* compliments of Tom Christiansen */
3100 /* unexec() can be found in the Gnu emacs distribution */
3101 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3104 Perl_my_unexec(pTHX)
3112 prog = newSVpv(BIN_EXP, 0);
3113 sv_catpv(prog, "/perl");
3114 file = newSVpv(PL_origfilename, 0);
3115 sv_catpv(file, ".perldump");
3117 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3118 /* unexec prints msg to stderr in case of failure */
3119 PerlProc_exit(status);
3122 # include <lib$routines.h>
3123 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3125 ABORT(); /* for use with undump */
3130 /* initialize curinterp */
3136 # define PERLVAR(var,type)
3137 # define PERLVARA(var,n,type)
3138 # if defined(PERL_IMPLICIT_CONTEXT)
3139 # if defined(USE_5005THREADS)
3140 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3141 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3142 # else /* !USE_5005THREADS */
3143 # define PERLVARI(var,type,init) aTHX->var = init;
3144 # define PERLVARIC(var,type,init) aTHX->var = init;
3145 # endif /* USE_5005THREADS */
3147 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3148 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3150 # include "intrpvar.h"
3151 # ifndef USE_5005THREADS
3152 # include "thrdvar.h"
3159 # define PERLVAR(var,type)
3160 # define PERLVARA(var,n,type)
3161 # define PERLVARI(var,type,init) PL_##var = init;
3162 # define PERLVARIC(var,type,init) PL_##var = init;
3163 # include "intrpvar.h"
3164 # ifndef USE_5005THREADS
3165 # include "thrdvar.h"
3176 S_init_main_stash(pTHX)
3180 PL_curstash = PL_defstash = newHV();
3181 PL_curstname = newSVpvn("main",4);
3182 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
3183 SvREFCNT_dec(GvHV(gv));
3184 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
3186 Perl_hv_name_set(aTHX_ PL_defstash, "main", 4, 0);
3187 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
3188 GvMULTI_on(PL_incgv);
3189 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
3190 GvMULTI_on(PL_hintgv);
3191 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
3192 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
3193 GvMULTI_on(PL_errgv);
3194 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
3195 GvMULTI_on(PL_replgv);
3196 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3197 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3198 sv_setpvn(ERRSV, "", 0);
3199 PL_curstash = PL_defstash;
3200 CopSTASH_set(&PL_compiling, PL_defstash);
3201 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
3202 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
3203 /* We must init $/ before switches are processed. */
3204 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3207 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
3209 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv)
3214 const char *cpp_discard_flag;
3223 PL_origfilename = savepvn("-e", 2);
3226 /* if find_script() returns, it returns a malloc()-ed value */
3227 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3229 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3230 const char *s = scriptname + 8;
3231 PL_fdscript = atoi(s);
3236 * Tell apart "normal" usage of fdscript, e.g.
3237 * with bash on FreeBSD:
3238 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3239 * from usage in suidperl.
3240 * Does any "normal" usage leave garbage after the number???
3241 * Is it a mistake to use a similar /dev/fd/ construct for
3246 * Be supersafe and do some sanity-checks.
3247 * Still, can we be sure we got the right thing?
3250 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3253 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3255 scriptname = savepv(s + 1);
3256 Safefree(PL_origfilename);
3257 PL_origfilename = (char *)scriptname;
3262 CopFILE_free(PL_curcop);
3263 CopFILE_set(PL_curcop, PL_origfilename);
3264 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3265 scriptname = (char *)"";
3266 if (PL_fdscript >= 0) {
3267 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3268 # if defined(HAS_FCNTL) && defined(F_SETFD)
3270 /* ensure close-on-exec */
3271 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3276 Perl_croak(aTHX_ "sperl needs fd script\n"
3277 "You should not call sperl directly; do you need to "
3278 "change a #! line\nfrom sperl to perl?\n");
3281 * Do not open (or do other fancy stuff) while setuid.
3282 * Perl does the open, and hands script to suidperl on a fd;
3283 * suidperl only does some checks, sets up UIDs and re-execs
3284 * perl with that fd as it has always done.
3287 if (PL_suidscript != 1) {
3288 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3291 else if (PL_preprocess) {
3292 const char *cpp_cfg = CPPSTDIN;
3293 SV *cpp = newSVpvn("",0);
3294 SV *cmd = NEWSV(0,0);
3296 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3297 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3298 if (strEQ(cpp_cfg, "cppstdin"))
3299 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3300 sv_catpv(cpp, cpp_cfg);
3303 sv_catpvn(sv, "-I", 2);
3304 sv_catpv(sv,PRIVLIB_EXP);
3307 DEBUG_P(PerlIO_printf(Perl_debug_log,
3308 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3309 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3312 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3319 cpp_discard_flag = "";
3321 cpp_discard_flag = "-C";
3325 perl = os2_execname(aTHX);
3327 perl = PL_origargv[0];
3331 /* This strips off Perl comments which might interfere with
3332 the C pre-processor, including #!. #line directives are
3333 deliberately stripped to avoid confusion with Perl's version
3334 of #line. FWP played some golf with it so it will fit
3335 into VMS's 255 character buffer.
3338 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3340 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3342 Perl_sv_setpvf(aTHX_ cmd, "\
3343 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3344 perl, quote, code, quote, scriptname, cpp,
3345 cpp_discard_flag, sv, CPPMINUS);
3347 PL_doextract = FALSE;
3349 DEBUG_P(PerlIO_printf(Perl_debug_log,
3350 "PL_preprocess: cmd=\"%s\"\n",
3353 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3357 else if (!*scriptname) {
3358 forbid_setid("program input from stdin");
3359 PL_rsfp = PerlIO_stdin();
3362 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3363 # if defined(HAS_FCNTL) && defined(F_SETFD)
3365 /* ensure close-on-exec */
3366 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3369 #endif /* IAMSUID */
3371 /* PSz 16 Sep 03 Keep neat error message */
3372 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3373 CopFILE(PL_curcop), Strerror(errno));
3378 * I_SYSSTATVFS HAS_FSTATVFS
3380 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3381 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3382 * here so that metaconfig picks them up. */
3386 S_fd_on_nosuid_fs(pTHX_ int fd)
3389 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3390 * but is needed also on machines without setreuid.
3391 * Seems safe enough to run as root.
3393 int check_okay = 0; /* able to do all the required sys/libcalls */
3394 int on_nosuid = 0; /* the fd is on a nosuid fs */
3396 * Need to check noexec also: nosuid might not be set, the average
3397 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3399 int on_noexec = 0; /* the fd is on a noexec fs */
3402 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3403 * fstatvfs() is UNIX98.
3404 * fstatfs() is 4.3 BSD.
3405 * ustat()+getmnt() is pre-4.3 BSD.
3406 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3407 * an irrelevant filesystem while trying to reach the right one.
3410 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3412 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3413 defined(HAS_FSTATVFS)
3414 # define FD_ON_NOSUID_CHECK_OKAY
3415 struct statvfs stfs;
3417 check_okay = fstatvfs(fd, &stfs) == 0;
3418 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3420 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3421 on platforms where it is present. */
3422 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3424 # endif /* fstatvfs */
3426 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3427 defined(PERL_MOUNT_NOSUID) && \
3428 defined(PERL_MOUNT_NOEXEC) && \
3429 defined(HAS_FSTATFS) && \
3430 defined(HAS_STRUCT_STATFS) && \
3431 defined(HAS_STRUCT_STATFS_F_FLAGS)
3432 # define FD_ON_NOSUID_CHECK_OKAY
3435 check_okay = fstatfs(fd, &stfs) == 0;
3436 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3437 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3438 # endif /* fstatfs */
3440 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3441 defined(PERL_MOUNT_NOSUID) && \
3442 defined(PERL_MOUNT_NOEXEC) && \
3443 defined(HAS_FSTAT) && \
3444 defined(HAS_USTAT) && \
3445 defined(HAS_GETMNT) && \
3446 defined(HAS_STRUCT_FS_DATA) && \
3448 # define FD_ON_NOSUID_CHECK_OKAY
3451 if (fstat(fd, &fdst) == 0) {
3453 if (ustat(fdst.st_dev, &us) == 0) {
3455 /* NOSTAT_ONE here because we're not examining fields which
3456 * vary between that case and STAT_ONE. */
3457 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3458 size_t cmplen = sizeof(us.f_fname);
3459 if (sizeof(fsd.fd_req.path) < cmplen)
3460 cmplen = sizeof(fsd.fd_req.path);
3461 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3462 fdst.st_dev == fsd.fd_req.dev) {
3464 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3465 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3471 # endif /* fstat+ustat+getmnt */
3473 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3474 defined(HAS_GETMNTENT) && \
3475 defined(HAS_HASMNTOPT) && \
3476 defined(MNTOPT_NOSUID) && \
3477 defined(MNTOPT_NOEXEC)
3478 # define FD_ON_NOSUID_CHECK_OKAY
3479 FILE *mtab = fopen("/etc/mtab", "r");
3480 struct mntent *entry;
3483 if (mtab && (fstat(fd, &stb) == 0)) {
3484 while (entry = getmntent(mtab)) {
3485 if (stat(entry->mnt_dir, &fsb) == 0
3486 && fsb.st_dev == stb.st_dev)
3488 /* found the filesystem */
3490 if (hasmntopt(entry, MNTOPT_NOSUID))
3492 if (hasmntopt(entry, MNTOPT_NOEXEC))
3495 } /* A single fs may well fail its stat(). */
3500 # endif /* getmntent+hasmntopt */
3503 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3505 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3507 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3508 return ((!check_okay) || on_nosuid || on_noexec);
3510 #endif /* IAMSUID */
3513 S_validate_suid(pTHX_ const char *validarg, const char *scriptname)
3518 #endif /* IAMSUID */
3520 /* do we need to emulate setuid on scripts? */
3522 /* This code is for those BSD systems that have setuid #! scripts disabled
3523 * in the kernel because of a security problem. Merely defining DOSUID
3524 * in perl will not fix that problem, but if you have disabled setuid
3525 * scripts in the kernel, this will attempt to emulate setuid and setgid
3526 * on scripts that have those now-otherwise-useless bits set. The setuid
3527 * root version must be called suidperl or sperlN.NNN. If regular perl
3528 * discovers that it has opened a setuid script, it calls suidperl with
3529 * the same argv that it had. If suidperl finds that the script it has
3530 * just opened is NOT setuid root, it sets the effective uid back to the
3531 * uid. We don't just make perl setuid root because that loses the
3532 * effective uid we had before invoking perl, if it was different from the
3535 * Description/comments above do not match current workings:
3536 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3537 * suidperl called with script open and name changed to /dev/fd/N/X;
3538 * suidperl croaks if script is not setuid;
3539 * making perl setuid would be a huge security risk (and yes, that
3540 * would lose any euid we might have had).
3542 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3543 * be defined in suidperl only. suidperl must be setuid root. The
3544 * Configure script will set this up for you if you want it.
3550 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3551 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3552 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3554 const char *linestr;
3557 if (PL_fdscript < 0 || PL_suidscript != 1)
3558 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3560 * Since the script is opened by perl, not suidperl, some of these
3561 * checks are superfluous. Leaving them in probably does not lower
3565 * Do checks even for systems with no HAS_SETREUID.
3566 * We used to swap, then re-swap UIDs with
3568 if (setreuid(PL_euid,PL_uid) < 0
3569 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3570 Perl_croak(aTHX_ "Can't swap uid and euid");
3573 if (setreuid(PL_uid,PL_euid) < 0
3574 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3575 Perl_croak(aTHX_ "Can't reswap uid and euid");
3579 /* On this access check to make sure the directories are readable,
3580 * there is actually a small window that the user could use to make
3581 * filename point to an accessible directory. So there is a faint
3582 * chance that someone could execute a setuid script down in a
3583 * non-accessible directory. I don't know what to do about that.
3584 * But I don't think it's too important. The manual lies when
3585 * it says access() is useful in setuid programs.
3587 * So, access() is pretty useless... but not harmful... do anyway.
3589 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3590 Perl_croak(aTHX_ "Can't access() script\n");
3593 /* If we can swap euid and uid, then we can determine access rights
3594 * with a simple stat of the file, and then compare device and
3595 * inode to make sure we did stat() on the same file we opened.
3596 * Then we just have to make sure he or she can execute it.
3599 * As the script is opened by perl, not suidperl, we do not need to
3600 * care much about access rights.
3602 * The 'script changed' check is needed, or we can get lied to
3603 * about $0 with e.g.
3604 * suidperl /dev/fd/4//bin/x 4<setuidscript
3605 * Without HAS_SETREUID, is it safe to stat() as root?
3607 * Are there any operating systems that pass /dev/fd/xxx for setuid
3608 * scripts, as suggested/described in perlsec(1)? Surely they do not
3609 * pass the script name as we do, so the "script changed" test would
3610 * fail for them... but we never get here with
3611 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3613 * This is one place where we must "lie" about return status: not
3614 * say if the stat() failed. We are doing this as root, and could
3615 * be tricked into reporting existence or not of files that the
3616 * "plain" user cannot even see.
3620 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3621 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3622 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3623 Perl_croak(aTHX_ "Setuid script changed\n");
3627 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3628 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3631 * We used to do this check as the "plain" user (after swapping
3632 * UIDs). But the check for nosuid and noexec filesystem is needed,
3633 * and should be done even without HAS_SETREUID. (Maybe those
3634 * operating systems do not have such mount options anyway...)
3635 * Seems safe enough to do as root.
3637 #if !defined(NO_NOSUID_CHECK)
3638 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3639 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3642 #endif /* IAMSUID */
3644 if (!S_ISREG(PL_statbuf.st_mode)) {
3645 Perl_croak(aTHX_ "Setuid script not plain file\n");
3647 if (PL_statbuf.st_mode & S_IWOTH)
3648 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3649 PL_doswitches = FALSE; /* -s is insecure in suid */
3650 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3651 CopLINE_inc(PL_curcop);
3652 linestr = SvPV_nolen_const(PL_linestr);
3653 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3654 strnNE(linestr,"#!",2) ) /* required even on Sys V */
3655 Perl_croak(aTHX_ "No #! line");
3659 /* Sanity check on line length */
3660 if (strlen(s) < 1 || strlen(s) > 4000)
3661 Perl_croak(aTHX_ "Very long #! line");
3662 /* Allow more than a single space after #! */
3663 while (isSPACE(*s)) s++;
3664 /* Sanity check on buffer end */
3665 while ((*s) && !isSPACE(*s)) s++;
3666 for (s2 = s; (s2 > linestr &&
3667 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3668 || s2[-1] == '-')); s2--) ;
3669 /* Sanity check on buffer start */
3670 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3671 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3672 Perl_croak(aTHX_ "Not a perl script");
3673 while (*s == ' ' || *s == '\t') s++;
3675 * #! arg must be what we saw above. They can invoke it by
3676 * mentioning suidperl explicitly, but they may not add any strange
3677 * arguments beyond what #! says if they do invoke suidperl that way.
3680 * The way validarg was set up, we rely on the kernel to start
3681 * scripts with argv[1] set to contain all #! line switches (the
3685 * Check that we got all the arguments listed in the #! line (not
3686 * just that there are no extraneous arguments). Might not matter
3687 * much, as switches from #! line seem to be acted upon (also), and
3688 * so may be checked and trapped in perl. But, security checks must
3689 * be done in suidperl and not deferred to perl. Note that suidperl
3690 * does not get around to parsing (and checking) the switches on
3691 * the #! line (but execs perl sooner).
3692 * Allow (require) a trailing newline (which may be of two
3693 * characters on some architectures?) (but no other trailing
3696 len = strlen(validarg);
3697 if (strEQ(validarg," PHOOEY ") ||
3698 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3699 !(strlen(s) == len+1 || (strlen(s) == len+2 && isSPACE(s[len+1]))))
3700 Perl_croak(aTHX_ "Args must match #! line");
3703 if (PL_fdscript < 0 &&
3704 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3705 PL_euid == PL_statbuf.st_uid)
3707 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3708 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3709 #endif /* IAMSUID */
3711 if (PL_fdscript < 0 &&
3712 PL_euid) { /* oops, we're not the setuid root perl */
3714 * When root runs a setuid script, we do not go through the same
3715 * steps of execing sperl and then perl with fd scripts, but
3716 * simply set up UIDs within the same perl invocation; so do
3717 * not have the same checks (on options, whatever) that we have
3718 * for plain users. No problem really: would have to be a script
3719 * that does not actually work for plain users; and if root is
3720 * foolish and can be persuaded to run such an unsafe script, he
3721 * might run also non-setuid ones, and deserves what he gets.
3723 * Or, we might drop the PL_euid check above (and rely just on
3724 * PL_fdscript to avoid loops), and do the execs
3730 * Pass fd script to suidperl.
3731 * Exec suidperl, substituting fd script for scriptname.
3732 * Pass script name as "subdir" of fd, which perl will grok;
3733 * in fact will use that to distinguish this from "normal"
3734 * usage, see comments above.
3736 PerlIO_rewind(PL_rsfp);
3737 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3738 /* PSz 27 Feb 04 Sanity checks on scriptname */
3739 if ((!scriptname) || (!*scriptname) ) {
3740 Perl_croak(aTHX_ "No setuid script name\n");
3742 if (*scriptname == '-') {
3743 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
3744 /* Or we might confuse it with an option when replacing
3745 * name in argument list, below (though we do pointer, not
3746 * string, comparisons).
3749 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3750 if (!PL_origargv[which]) {
3751 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
3753 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
3754 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
3755 #if defined(HAS_FCNTL) && defined(F_SETFD)
3756 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
3759 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
3760 (int)PERL_REVISION, (int)PERL_VERSION,
3761 (int)PERL_SUBVERSION), PL_origargv);
3763 #endif /* IAMSUID */
3764 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
3767 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
3769 * This seems back to front: we try HAS_SETEGID first; if not available
3770 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
3771 * in the sense that we only want to set EGID; but are there any machines
3772 * with either of the latter, but not the former? Same with UID, later.
3775 (void)setegid(PL_statbuf.st_gid);
3778 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
3780 #ifdef HAS_SETRESGID
3781 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
3783 PerlProc_setgid(PL_statbuf.st_gid);
3787 if (PerlProc_getegid() != PL_statbuf.st_gid)
3788 Perl_croak(aTHX_ "Can't do setegid!\n");
3790 if (PL_statbuf.st_mode & S_ISUID) {
3791 if (PL_statbuf.st_uid != PL_euid)
3793 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
3796 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
3798 #ifdef HAS_SETRESUID
3799 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
3801 PerlProc_setuid(PL_statbuf.st_uid);
3805 if (PerlProc_geteuid() != PL_statbuf.st_uid)
3806 Perl_croak(aTHX_ "Can't do seteuid!\n");
3808 else if (PL_uid) { /* oops, mustn't run as root */
3810 (void)seteuid((Uid_t)PL_uid);
3813 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
3815 #ifdef HAS_SETRESUID
3816 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
3818 PerlProc_setuid((Uid_t)PL_uid);
3822 if (PerlProc_geteuid() != PL_uid)
3823 Perl_croak(aTHX_ "Can't do seteuid!\n");
3826 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
3827 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
3830 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
3831 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
3832 else if (PL_fdscript < 0 || PL_suidscript != 1)
3833 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
3834 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
3836 /* PSz 16 Sep 03 Keep neat error message */
3837 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
3840 /* We absolutely must clear out any saved ids here, so we */
3841 /* exec the real perl, substituting fd script for scriptname. */
3842 /* (We pass script name as "subdir" of fd, which perl will grok.) */
3844 * It might be thought that using setresgid and/or setresuid (changed to
3845 * set the saved IDs) above might obviate the need to exec, and we could
3846 * go on to "do the perl thing".
3848 * Is there such a thing as "saved GID", and is that set for setuid (but
3849 * not setgid) execution like suidperl? Without exec, it would not be
3850 * cleared for setuid (but not setgid) scripts (or might need a dummy
3853 * We need suidperl to do the exact same argument checking that perl
3854 * does. Thus it cannot be very small; while it could be significantly
3855 * smaller, it is safer (simpler?) to make it essentially the same
3856 * binary as perl (but they are not identical). - Maybe could defer that
3857 * check to the invoked perl, and suidperl be a tiny wrapper instead;
3858 * but prefer to do thorough checks in suidperl itself. Such deferral
3859 * would make suidperl security rely on perl, a design no-no.
3861 * Setuid things should be short and simple, thus easy to understand and
3862 * verify. They should do their "own thing", without influence by
3863 * attackers. It may help if their internal execution flow is fixed,
3864 * regardless of platform: it may be best to exec anyway.
3866 * Suidperl should at least be conceptually simple: a wrapper only,
3867 * never to do any real perl. Maybe we should put
3869 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
3871 * into the perly bits.
3873 PerlIO_rewind(PL_rsfp);
3874 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3876 * Keep original arguments: suidperl already has fd script.
3878 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
3879 /* if (!PL_origargv[which]) { */
3880 /* errno = EPERM; */
3881 /* Perl_croak(aTHX_ "Permission denied\n"); */
3883 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
3884 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
3885 #if defined(HAS_FCNTL) && defined(F_SETFD)
3886 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
3889 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
3890 (int)PERL_REVISION, (int)PERL_VERSION,
3891 (int)PERL_SUBVERSION), PL_origargv);/* try again */
3893 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
3894 #endif /* IAMSUID */
3896 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3897 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
3898 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3899 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3901 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3904 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3905 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3906 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3907 /* not set-id, must be wrapped */
3915 S_find_beginning(pTHX)
3918 register const char *s2;
3919 #ifdef MACOS_TRADITIONAL
3923 /* skip forward in input to the real script? */
3926 #ifdef MACOS_TRADITIONAL
3927 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
3929 while (PL_doextract || gMacPerl_AlwaysExtract) {
3930 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3931 if (!gMacPerl_AlwaysExtract)
3932 Perl_croak(aTHX_ "No Perl script found in input\n");
3934 if (PL_doextract) /* require explicit override ? */
3935 if (!OverrideExtract(PL_origfilename))
3936 Perl_croak(aTHX_ "User aborted script\n");
3938 PL_doextract = FALSE;
3940 /* Pater peccavi, file does not have #! */
3941 PerlIO_rewind(PL_rsfp);
3946 while (PL_doextract) {
3947 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
3948 Perl_croak(aTHX_ "No Perl script found in input\n");
3951 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3952 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3953 PL_doextract = FALSE;
3954 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3956 while (*s == ' ' || *s == '\t') s++;
3958 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3959 || s2[-1] == '_') s2--;
3960 if (strnEQ(s2-4,"perl",4))
3961 while ((s = moreswitches(s)))
3964 #ifdef MACOS_TRADITIONAL
3965 /* We are always searching for the #!perl line in MacPerl,
3966 * so if we find it, still keep the line count correct
3967 * by counting lines we already skipped over
3969 for (; maclines > 0 ; maclines--)
3970 PerlIO_ungetc(PL_rsfp, '\n');
3974 /* gMacPerl_AlwaysExtract is false in MPW tool */
3975 } else if (gMacPerl_AlwaysExtract) {
3986 PL_uid = PerlProc_getuid();
3987 PL_euid = PerlProc_geteuid();
3988 PL_gid = PerlProc_getgid();
3989 PL_egid = PerlProc_getegid();
3991 PL_uid |= PL_gid << 16;
3992 PL_euid |= PL_egid << 16;
3994 /* Should not happen: */
3995 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3996 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3999 * Should go by suidscript, not uid!=euid: why disallow
4000 * system("ls") in scripts run from setuid things?
4001 * Or, is this run before we check arguments and set suidscript?
4002 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4003 * (We never have suidscript, can we be sure to have fdscript?)
4004 * Or must then go by UID checks? See comments in forbid_setid also.
4008 /* This is used very early in the lifetime of the program,
4009 * before even the options are parsed, so PL_tainting has
4010 * not been initialized properly. */
4012 Perl_doing_taint(int argc, char *argv[], char *envp[])
4014 #ifndef PERL_IMPLICIT_SYS
4015 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4016 * before we have an interpreter-- and the whole point of this
4017 * function is to be called at such an early stage. If you are on
4018 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4019 * "tainted because running with altered effective ids', you'll
4020 * have to add your own checks somewhere in here. The two most
4021 * known samples of 'implicitness' are Win32 and NetWare, neither
4022 * of which has much of concept of 'uids'. */
4023 int uid = PerlProc_getuid();
4024 int euid = PerlProc_geteuid();
4025 int gid = PerlProc_getgid();
4026 int egid = PerlProc_getegid();
4033 if (uid && (euid != uid || egid != gid))
4035 #endif /* !PERL_IMPLICIT_SYS */
4036 /* This is a really primitive check; environment gets ignored only
4037 * if -T are the first chars together; otherwise one gets
4038 * "Too late" message. */
4039 if ( argc > 1 && argv[1][0] == '-'
4040 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4046 S_forbid_setid(pTHX_ const char *s)
4048 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4049 if (PL_euid != PL_uid)
4050 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
4051 if (PL_egid != PL_gid)
4052 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
4053 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4055 * Checks for UID/GID above "wrong": why disallow
4056 * perl -e 'print "Hello\n"'
4057 * from within setuid things?? Simply drop them: replaced by
4058 * fdscript/suidscript and #ifdef IAMSUID checks below.
4060 * This may be too late for command-line switches. Will catch those on
4061 * the #! line, after finding the script name and setting up
4062 * fdscript/suidscript. Note that suidperl does not get around to
4063 * parsing (and checking) the switches on the #! line, but checks that
4064 * the two sets are identical.
4066 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4067 * instead, or would that be "too late"? (We never have suidscript, can
4068 * we be sure to have fdscript?)
4070 * Catch things with suidscript (in descendant of suidperl), even with
4071 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4072 * below; but I am paranoid.
4074 * Also see comments about root running a setuid script, elsewhere.
4076 if (PL_suidscript >= 0)
4077 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
4079 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4080 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
4081 #endif /* IAMSUID */
4085 Perl_init_debugger(pTHX)
4087 HV *ostash = PL_curstash;
4089 PL_curstash = PL_debstash;
4090 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
4091 AvREAL_off(PL_dbargs);
4092 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
4093 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4094 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
4095 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
4096 sv_setiv(PL_DBsingle, 0);
4097 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
4098 sv_setiv(PL_DBtrace, 0);
4099 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
4100 sv_setiv(PL_DBsignal, 0);
4101 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
4102 sv_setiv(PL_DBassertion, 0);
4103 PL_curstash = ostash;
4106 #ifndef STRESS_REALLOC
4107 #define REASONABLE(size) (size)
4109 #define REASONABLE(size) (1) /* unreasonable */
4113 Perl_init_stacks(pTHX)
4115 /* start with 128-item stack and 8K cxstack */
4116 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4117 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4118 PL_curstackinfo->si_type = PERLSI_MAIN;
4119 PL_curstack = PL_curstackinfo->si_stack;
4120 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4122 PL_stack_base = AvARRAY(PL_curstack);
4123 PL_stack_sp = PL_stack_base;
4124 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4126 New(50,PL_tmps_stack,REASONABLE(128),SV*);
4129 PL_tmps_max = REASONABLE(128);
4131 New(54,PL_markstack,REASONABLE(32),I32);
4132 PL_markstack_ptr = PL_markstack;
4133 PL_markstack_max = PL_markstack + REASONABLE(32);
4137 New(54,PL_scopestack,REASONABLE(32),I32);
4138 PL_scopestack_ix = 0;
4139 PL_scopestack_max = REASONABLE(32);
4141 New(54,PL_savestack,REASONABLE(128),ANY);
4142 PL_savestack_ix = 0;
4143 PL_savestack_max = REASONABLE(128);
4151 while (PL_curstackinfo->si_next)
4152 PL_curstackinfo = PL_curstackinfo->si_next;
4153 while (PL_curstackinfo) {
4154 PERL_SI *p = PL_curstackinfo->si_prev;
4155 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4156 Safefree(PL_curstackinfo->si_cxstack);
4157 Safefree(PL_curstackinfo);
4158 PL_curstackinfo = p;
4160 Safefree(PL_tmps_stack);
4161 Safefree(PL_markstack);
4162 Safefree(PL_scopestack);
4163 Safefree(PL_savestack);
4172 lex_start(PL_linestr);
4174 PL_subname = newSVpvn("main",4);
4178 S_init_predump_symbols(pTHX)
4183 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4184 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
4185 GvMULTI_on(PL_stdingv);
4186 io = GvIOp(PL_stdingv);
4187 IoTYPE(io) = IoTYPE_RDONLY;
4188 IoIFP(io) = PerlIO_stdin();
4189 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
4191 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4193 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
4196 IoTYPE(io) = IoTYPE_WRONLY;
4197 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4199 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
4201 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4203 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
4204 GvMULTI_on(PL_stderrgv);
4205 io = GvIOp(PL_stderrgv);
4206 IoTYPE(io) = IoTYPE_WRONLY;
4207 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4208 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
4210 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
4212 PL_statname = NEWSV(66,0); /* last filename we did stat on */
4215 Safefree(PL_osname);
4216 PL_osname = savepv(OSNAME);
4220 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4223 argc--,argv++; /* skip name of script */
4224 if (PL_doswitches) {
4225 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4228 if (argv[0][1] == '-' && !argv[0][2]) {
4232 if ((s = strchr(argv[0], '='))) {
4234 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
4237 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
4240 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
4241 GvMULTI_on(PL_argvgv);
4242 (void)gv_AVadd(PL_argvgv);
4243 av_clear(GvAVn(PL_argvgv));
4244 for (; argc > 0; argc--,argv++) {
4245 SV *sv = newSVpv(argv[0],0);
4246 av_push(GvAVn(PL_argvgv),sv);
4247 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4248 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4251 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4252 (void)sv_utf8_decode(sv);
4258 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4263 PL_toptarget = NEWSV(0,0);
4264 sv_upgrade(PL_toptarget, SVt_PVFM);
4265 sv_setpvn(PL_toptarget, "", 0);
4266 PL_bodytarget = NEWSV(0,0);
4267 sv_upgrade(PL_bodytarget, SVt_PVFM);
4268 sv_setpvn(PL_bodytarget, "", 0);
4269 PL_formtarget = PL_bodytarget;
4273 init_argv_symbols(argc,argv);
4275 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4276 #ifdef MACOS_TRADITIONAL
4277 /* $0 is not majick on a Mac */
4278 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4280 sv_setpv(GvSV(tmpgv),PL_origfilename);
4281 magicname("0", "0", 1);
4284 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4286 GvMULTI_on(PL_envgv);
4287 hv = GvHVn(PL_envgv);
4288 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4290 #ifdef USE_ENVIRON_ARRAY
4291 /* Note that if the supplied env parameter is actually a copy
4292 of the global environ then it may now point to free'd memory
4293 if the environment has been modified since. To avoid this
4294 problem we treat env==NULL as meaning 'use the default'
4299 # ifdef USE_ITHREADS
4300 && PL_curinterp == aTHX
4304 environ[0] = Nullch;
4307 char** origenv = environ;
4310 for (; *env; env++) {
4311 if (!(s = strchr(*env,'=')) || s == *env)
4313 #if defined(MSDOS) && !defined(DJGPP)
4318 sv = newSVpv(s+1, 0);
4319 (void)hv_store(hv, *env, s - *env, sv, 0);
4322 if (origenv != environ) {
4323 /* realloc has shifted us */
4324 env = (env - origenv) + environ;
4329 #endif /* USE_ENVIRON_ARRAY */
4330 #endif /* !PERL_MICRO */
4333 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4334 SvREADONLY_off(GvSV(tmpgv));
4335 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4336 SvREADONLY_on(GvSV(tmpgv));
4338 #ifdef THREADS_HAVE_PIDS
4339 PL_ppid = (IV)getppid();
4342 /* touch @F array to prevent spurious warnings 20020415 MJD */
4344 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4346 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4347 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4348 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4352 S_init_perllib(pTHX)
4357 s = PerlEnv_getenv("PERL5LIB");
4359 incpush(s, TRUE, TRUE, TRUE, FALSE);
4361 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4363 /* Treat PERL5?LIB as a possible search list logical name -- the
4364 * "natural" VMS idiom for a Unix path string. We allow each
4365 * element to be a set of |-separated directories for compatibility.
4369 if (my_trnlnm("PERL5LIB",buf,0))
4370 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4372 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4376 /* Use the ~-expanded versions of APPLLIB (undocumented),
4377 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4380 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4384 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4386 #ifdef MACOS_TRADITIONAL
4389 SV * privdir = NEWSV(55, 0);
4390 char * macperl = PerlEnv_getenv("MACPERL");
4395 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4396 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4397 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4398 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4399 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4400 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4402 SvREFCNT_dec(privdir);
4405 incpush(":", FALSE, FALSE, TRUE, FALSE);
4408 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4411 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4413 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4417 /* sitearch is always relative to sitelib on Windows for
4418 * DLL-based path intuition to work correctly */
4419 # if !defined(WIN32)
4420 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4426 /* this picks up sitearch as well */
4427 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4429 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4433 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4434 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4437 #ifdef PERL_VENDORARCH_EXP
4438 /* vendorarch is always relative to vendorlib on Windows for
4439 * DLL-based path intuition to work correctly */
4440 # if !defined(WIN32)
4441 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4445 #ifdef PERL_VENDORLIB_EXP
4447 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4449 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4453 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4454 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4457 #ifdef PERL_OTHERLIBDIRS
4458 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4462 incpush(".", FALSE, FALSE, TRUE, FALSE);
4463 #endif /* MACOS_TRADITIONAL */
4466 #if defined(DOSISH) || defined(EPOC) || defined(SYMBIAN)
4467 # define PERLLIB_SEP ';'
4470 # define PERLLIB_SEP '|'
4472 # if defined(MACOS_TRADITIONAL)
4473 # define PERLLIB_SEP ','
4475 # define PERLLIB_SEP ':'
4479 #ifndef PERLLIB_MANGLE
4480 # define PERLLIB_MANGLE(s,n) (s)
4483 /* Push a directory onto @INC if it exists.
4484 Generate a new SV if we do this, to save needing to copy the SV we push
4487 S_incpush_if_exists(pTHX_ SV *dir)
4490 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4491 S_ISDIR(tmpstatbuf.st_mode)) {
4492 av_push(GvAVn(PL_incgv), dir);
4499 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4502 SV *subdir = Nullsv;
4503 const char *p = dir;
4508 if (addsubdirs || addoldvers) {
4509 subdir = NEWSV(0,0);
4512 /* Break at all separators */
4514 SV *libdir = NEWSV(55,0);
4517 /* skip any consecutive separators */
4519 while ( *p == PERLLIB_SEP ) {
4520 /* Uncomment the next line for PATH semantics */
4521 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4526 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4527 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4532 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4533 p = Nullch; /* break out */
4535 #ifdef MACOS_TRADITIONAL
4536 if (!strchr(SvPVX(libdir), ':')) {
4539 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4541 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4542 sv_catpv(libdir, ":");
4545 /* Do the if() outside the #ifdef to avoid warnings about an unused
4548 #ifdef PERL_RELOCATABLE_INC
4550 * Relocatable include entries are marked with a leading .../
4553 * 0: Remove that leading ".../"
4554 * 1: Remove trailing executable name (anything after the last '/')
4555 * from the perl path to give a perl prefix
4557 * While the @INC element starts "../" and the prefix ends with a real
4558 * directory (ie not . or ..) chop that real directory off the prefix
4559 * and the leading "../" from the @INC element. ie a logical "../"
4561 * Finally concatenate the prefix and the remainder of the @INC element
4562 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4563 * generates /usr/local/lib/perl5
4565 char *libpath = SvPVX(libdir);
4566 STRLEN libpath_len = SvCUR(libdir);
4567 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4569 SV *caret_X = get_sv("\030", 0);
4570 /* Going to use the SV just as a scratch buffer holding a C
4576 /* $^X is *the* source of taint if tainting is on, hence
4577 SvPOK() won't be true. */
4579 assert(SvPOKp(caret_X));
4580 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4581 /* Firstly take off the leading .../
4582 If all else fail we'll do the paths relative to the current
4584 sv_chop(libdir, libpath + 4);
4585 /* Don't use SvPV as we're intentionally bypassing taining,
4586 mortal copies that the mg_get of tainting creates, and
4587 corruption that seems to come via the save stack.
4588 I guess that the save stack isn't correctly set up yet. */
4589 libpath = SvPVX(libdir);
4590 libpath_len = SvCUR(libdir);
4592 /* This would work more efficiently with memrchr, but as it's
4593 only a GNU extension we'd need to probe for it and
4594 implement our own. Not hard, but maybe not worth it? */
4596 prefix = SvPVX(prefix_sv);
4597 lastslash = strrchr(prefix, '/');
4599 /* First time in with the *lastslash = '\0' we just wipe off
4600 the trailing /perl from (say) /usr/foo/bin/perl
4604 while ((*lastslash = '\0'), /* Do that, come what may. */
4605 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4606 && (lastslash = strrchr(prefix, '/')))) {
4607 if (lastslash[1] == '\0'
4608 || (lastslash[1] == '.'
4609 && (lastslash[2] == '/' /* ends "/." */
4610 || (lastslash[2] == '/'
4611 && lastslash[3] == '/' /* or "/.." */
4613 /* Prefix ends "/" or "/." or "/..", any of which
4614 are fishy, so don't do any more logical cleanup.
4618 /* Remove leading "../" from path */
4621 /* Next iteration round the loop removes the last
4622 directory name from prefix by writing a '\0' in
4623 the while clause. */
4625 /* prefix has been terminated with a '\0' to the correct
4626 length. libpath points somewhere into the libdir SV.
4627 We need to join the 2 with '/' and drop the result into
4629 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4630 SvREFCNT_dec(libdir);
4631 /* And this is the new libdir. */
4634 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4635 /* Need to taint reloccated paths if running set ID */
4636 SvTAINTED_on(libdir);
4639 SvREFCNT_dec(prefix_sv);
4644 * BEFORE pushing libdir onto @INC we may first push version- and
4645 * archname-specific sub-directories.
4647 if (addsubdirs || addoldvers) {
4648 #ifdef PERL_INC_VERSION_LIST
4649 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4650 const char *incverlist[] = { PERL_INC_VERSION_LIST };
4651 const char **incver;
4657 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4659 while (unix[len-1] == '/') len--; /* Cosmetic */
4660 sv_usepvn(libdir,unix,len);
4663 PerlIO_printf(Perl_error_log,
4664 "Failed to unixify @INC element \"%s\"\n",
4668 #ifdef MACOS_TRADITIONAL
4669 #define PERL_AV_SUFFIX_FMT ""
4670 #define PERL_ARCH_FMT "%s:"
4671 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4673 #define PERL_AV_SUFFIX_FMT "/"
4674 #define PERL_ARCH_FMT "/%s"
4675 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4677 /* .../version/archname if -d .../version/archname */
4678 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4680 (int)PERL_REVISION, (int)PERL_VERSION,
4681 (int)PERL_SUBVERSION, ARCHNAME);
4682 subdir = S_incpush_if_exists(aTHX_ subdir);
4684 /* .../version if -d .../version */
4685 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4686 (int)PERL_REVISION, (int)PERL_VERSION,
4687 (int)PERL_SUBVERSION);
4688 subdir = S_incpush_if_exists(aTHX_ subdir);
4690 /* .../archname if -d .../archname */
4691 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4692 subdir = S_incpush_if_exists(aTHX_ subdir);
4696 #ifdef PERL_INC_VERSION_LIST
4698 for (incver = incverlist; *incver; incver++) {
4699 /* .../xxx if -d .../xxx */
4700 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4701 subdir = S_incpush_if_exists(aTHX_ subdir);
4707 /* finally push this lib directory on the end of @INC */
4708 av_push(GvAVn(PL_incgv), libdir);
4711 assert (SvREFCNT(subdir) == 1);
4712 SvREFCNT_dec(subdir);
4716 #ifdef USE_5005THREADS
4717 STATIC struct perl_thread *
4718 S_init_main_thread(pTHX)
4720 #if !defined(PERL_IMPLICIT_CONTEXT)
4721 struct perl_thread *thr;
4725 Newz(53, thr, 1, struct perl_thread);
4726 PL_curcop = &PL_compiling;
4727 thr->interp = PERL_GET_INTERP;
4728 thr->cvcache = newHV();
4729 thr->threadsv = newAV();
4730 /* thr->threadsvp is set when find_threadsv is called */
4731 thr->specific = newAV();
4732 thr->flags = THRf_R_JOINABLE;
4733 MUTEX_INIT(&thr->mutex);
4734 /* Handcraft thrsv similarly to mess_sv */
4735 New(53, PL_thrsv, 1, SV);
4736 Newz(53, xpv, 1, XPV);
4737 SvFLAGS(PL_thrsv) = SVt_PV;
4738 SvANY(PL_thrsv) = (void*)xpv;
4739 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
4740 SvPV_set(PL_thrsvr, (char*)thr);
4741 SvCUR_set(PL_thrsv, sizeof(thr));
4742 SvLEN_set(PL_thrsv, sizeof(thr));
4743 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
4744 thr->oursv = PL_thrsv;
4745 PL_chopset = " \n-";
4748 MUTEX_LOCK(&PL_threads_mutex);
4754 MUTEX_UNLOCK(&PL_threads_mutex);
4756 #ifdef HAVE_THREAD_INTERN
4757 Perl_init_thread_intern(thr);
4760 #ifdef SET_THREAD_SELF
4761 SET_THREAD_SELF(thr);
4763 thr->self = pthread_self();
4764 #endif /* SET_THREAD_SELF */
4768 * These must come after the thread self setting
4769 * because sv_setpvn does SvTAINT and the taint
4770 * fields thread selfness being set.
4772 PL_toptarget = NEWSV(0,0);
4773 sv_upgrade(PL_toptarget, SVt_PVFM);
4774 sv_setpvn(PL_toptarget, "", 0);
4775 PL_bodytarget = NEWSV(0,0);
4776 sv_upgrade(PL_bodytarget, SVt_PVFM);
4777 sv_setpvn(PL_bodytarget, "", 0);
4778 PL_formtarget = PL_bodytarget;
4779 thr->errsv = newSVpvn("", 0);
4780 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
4783 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
4784 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
4785 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
4786 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
4787 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
4788 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
4790 PL_reginterp_cnt = 0;
4794 #endif /* USE_5005THREADS */
4797 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4801 const line_t oldline = CopLINE(PL_curcop);
4807 while (av_len(paramList) >= 0) {
4808 cv = (CV*)av_shift(paramList);
4810 if (paramList == PL_beginav) {
4811 /* save PL_beginav for compiler */
4812 if (! PL_beginav_save)
4813 PL_beginav_save = newAV();
4814 av_push(PL_beginav_save, (SV*)cv);
4816 else if (paramList == PL_checkav) {
4817 /* save PL_checkav for compiler */
4818 if (! PL_checkav_save)
4819 PL_checkav_save = newAV();
4820 av_push(PL_checkav_save, (SV*)cv);
4830 (void)SvPV_const(atsv, len);
4832 PL_curcop = &PL_compiling;
4833 CopLINE_set(PL_curcop, oldline);
4834 if (paramList == PL_beginav)
4835 sv_catpv(atsv, "BEGIN failed--compilation aborted");
4837 Perl_sv_catpvf(aTHX_ atsv,
4838 "%s failed--call queue aborted",
4839 paramList == PL_checkav ? "CHECK"
4840 : paramList == PL_initav ? "INIT"
4842 while (PL_scopestack_ix > oldscope)
4845 Perl_croak(aTHX_ "%"SVf"", atsv);
4852 /* my_exit() was called */
4853 while (PL_scopestack_ix > oldscope)
4856 PL_curstash = PL_defstash;
4857 PL_curcop = &PL_compiling;
4858 CopLINE_set(PL_curcop, oldline);
4860 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4861 if (paramList == PL_beginav)
4862 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4864 Perl_croak(aTHX_ "%s failed--call queue aborted",
4865 paramList == PL_checkav ? "CHECK"
4866 : paramList == PL_initav ? "INIT"
4873 PL_curcop = &PL_compiling;
4874 CopLINE_set(PL_curcop, oldline);
4877 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4886 S_call_list_body(pTHX_ CV *cv)
4888 PUSHMARK(PL_stack_sp);
4889 call_sv((SV*)cv, G_EVAL|G_DISCARD);
4894 Perl_my_exit(pTHX_ U32 status)
4896 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
4897 thr, (unsigned long) status));
4906 STATUS_NATIVE_SET(status);
4913 Perl_my_failure_exit(pTHX)
4916 if (vaxc$errno & 1) {
4917 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
4918 STATUS_NATIVE_SET(44);
4921 if (!vaxc$errno) /* unlikely */
4922 STATUS_NATIVE_SET(44);
4924 STATUS_NATIVE_SET(vaxc$errno);
4929 STATUS_UNIX_SET(errno);
4931 exitstatus = STATUS_UNIX >> 8;
4932 if (exitstatus & 255)
4933 STATUS_UNIX_SET(exitstatus);
4935 STATUS_UNIX_SET(255);
4942 S_my_exit_jump(pTHX)
4945 register PERL_CONTEXT *cx;
4950 SvREFCNT_dec(PL_e_script);
4951 PL_e_script = Nullsv;
4954 POPSTACK_TO(PL_mainstack);
4955 if (cxstack_ix >= 0) {
4958 POPBLOCK(cx,PL_curpm);
4966 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4972 p = SvPVX_const(PL_e_script);
4973 nl = strchr(p, '\n');
4974 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4976 filter_del(read_e_script);
4979 sv_catpvn(buf_sv, p, nl-p);
4980 sv_chop(PL_e_script, nl);
4986 * c-indentation-style: bsd
4988 * indent-tabs-mode: t
4991 * ex: set ts=8 sts=4 sw=4 noet: