3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 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. */
107 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
108 char *getenv (char *); /* Usually in <stdlib.h> */
111 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
119 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
125 #if defined(USE_ITHREADS)
126 # define INIT_TLS_AND_INTERP \
128 if (!PL_curinterp) { \
129 PERL_SET_INTERP(my_perl); \
132 PERL_SET_THX(my_perl); \
134 MUTEX_INIT(&PL_dollarzero_mutex); \
137 PERL_SET_THX(my_perl); \
141 # define INIT_TLS_AND_INTERP \
143 if (!PL_curinterp) { \
144 PERL_SET_INTERP(my_perl); \
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));
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;
191 #ifdef USE_5005THREADS
195 /* New() needs interpreter, so call malloc() instead */
196 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
199 return ZeroD(my_perl, 1, PerlInterpreter);
201 #endif /* PERL_IMPLICIT_SYS */
204 =for apidoc perl_construct
206 Initializes a new Perl interpreter. See L<perlembed>.
212 perl_construct(pTHXx)
216 PL_perl_destruct_level = 1;
218 if (PL_perl_destruct_level > 0)
221 /* Init the real globals (and main thread)? */
223 #ifdef PERL_FLEXIBLE_EXCEPTIONS
224 PL_protect = MEMBER_TO_FPTR(Perl_default_protect); /* for exceptions */
227 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
229 PL_linestr = NEWSV(65,79);
230 sv_upgrade(PL_linestr,SVt_PVIV);
232 if (!SvREADONLY(&PL_sv_undef)) {
233 /* set read-only and try to insure than we wont see REFCNT==0
236 SvREADONLY_on(&PL_sv_undef);
237 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
239 sv_setpv(&PL_sv_no,PL_No);
241 SvREADONLY_on(&PL_sv_no);
242 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
244 sv_setpv(&PL_sv_yes,PL_Yes);
246 SvREADONLY_on(&PL_sv_yes);
247 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
249 SvREADONLY_on(&PL_sv_placeholder);
250 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
253 PL_sighandlerp = Perl_sighandler;
254 PL_pidstatus = newHV();
257 PL_rs = newSVpvn("\n", 1);
262 PL_lex_state = LEX_NOTPARSING;
268 SET_NUMERIC_STANDARD();
270 #if defined(LOCAL_PATCH_COUNT)
271 PL_localpatches = local_patches; /* For possible -v */
274 #ifdef HAVE_INTERP_INTERN
278 PerlIO_init(aTHX); /* Hook to IO system */
280 PL_fdpid = newAV(); /* for remembering popen pids by fd */
281 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
282 PL_errors = newSVpvn("",0);
283 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
284 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
285 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
287 PL_regex_padav = newAV();
288 av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */
289 PL_regex_pad = AvARRAY(PL_regex_padav);
291 #ifdef USE_REENTRANT_API
292 Perl_reentrant_init(aTHX);
295 /* Note that strtab is a rather special HV. Assumptions are made
296 about not iterating on it, and not adding tie magic to it.
297 It is properly deallocated in perl_destruct() */
300 HvSHAREKEYS_off(PL_strtab); /* mandatory */
301 hv_ksplit(PL_strtab, 512);
303 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
304 _dyld_lookup_and_bind
305 ("__environ", (unsigned long *) &environ_pointer, NULL);
309 # ifdef USE_ENVIRON_ARRAY
310 PL_origenviron = environ;
314 /* Use sysconf(_SC_CLK_TCK) if available, if not
315 * available or if the sysconf() fails, use the HZ. */
316 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK)
317 PL_clocktick = sysconf(_SC_CLK_TCK);
318 if (PL_clocktick <= 0)
322 PL_stashcache = newHV();
324 PL_patchlevel = newSVpv(
325 Perl_form(aTHX_ "%d.%d.%d",
328 (int)PERL_SUBVERSION ), 0
335 =for apidoc nothreadhook
337 Stub that provides thread hook for perl_destruct when there are
344 Perl_nothreadhook(pTHX)
350 =for apidoc perl_destruct
352 Shuts down a Perl interpreter. See L<perlembed>.
360 volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */
362 #ifdef USE_5005THREADS
364 #endif /* USE_5005THREADS */
366 /* wait for all pseudo-forked children to finish */
367 PERL_WAIT_FOR_CHILDREN;
369 destruct_level = PL_perl_destruct_level;
373 if ((s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"))) {
375 if (destruct_level < i)
382 if(PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
387 if (PL_endav && !PL_minus_c)
388 call_list(PL_scopestack_ix, PL_endav);
394 /* Need to flush since END blocks can produce output */
397 if (CALL_FPTR(PL_threadhook)(aTHX)) {
398 /* Threads hook has vetoed further cleanup */
399 return STATUS_NATIVE_EXPORT;
402 /* We must account for everything. */
404 /* Destroy the main CV and syntax tree */
406 /* ensure comppad/curpad to refer to main's pad */
407 if (CvPADLIST(PL_main_cv)) {
408 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
410 op_free(PL_main_root);
411 PL_main_root = Nullop;
413 PL_curcop = &PL_compiling;
414 PL_main_start = Nullop;
415 SvREFCNT_dec(PL_main_cv);
419 /* Tell PerlIO we are about to tear things apart in case
420 we have layers which are using resources that should
424 PerlIO_destruct(aTHX);
426 if (PL_sv_objcount) {
428 * Try to destruct global references. We do this first so that the
429 * destructors and destructees still exist. Some sv's might remain.
430 * Non-referenced objects are on their own.
436 /* unhook hooks which will soon be, or use, destroyed data */
437 SvREFCNT_dec(PL_warnhook);
438 PL_warnhook = Nullsv;
439 SvREFCNT_dec(PL_diehook);
442 /* call exit list functions */
443 while (PL_exitlistlen-- > 0)
444 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
446 Safefree(PL_exitlist);
451 if (destruct_level == 0){
453 DEBUG_P(debprofdump());
455 #if defined(PERLIO_LAYERS)
456 /* No more IO - including error messages ! */
457 PerlIO_cleanup(aTHX);
460 /* The exit() function will do everything that needs doing. */
461 return STATUS_NATIVE_EXPORT;
464 /* jettison our possibly duplicated environment */
465 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
466 * so we certainly shouldn't free it here
469 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
470 if (environ != PL_origenviron
472 /* only main thread can free environ[0] contents */
473 && PL_curinterp == aTHX
479 for (i = 0; environ[i]; i++)
480 safesysfree(environ[i]);
482 /* Must use safesysfree() when working with environ. */
483 safesysfree(environ);
485 environ = PL_origenviron;
488 #endif /* !PERL_MICRO */
490 /* reset so print() ends up where we expect */
494 /* the syntax tree is shared between clones
495 * so op_free(PL_main_root) only ReREFCNT_dec's
496 * REGEXPs in the parent interpreter
497 * we need to manually ReREFCNT_dec for the clones
500 I32 i = AvFILLp(PL_regex_padav) + 1;
501 SV **ary = AvARRAY(PL_regex_padav);
505 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
507 if (SvFLAGS(resv) & SVf_BREAK) {
508 /* this is PL_reg_curpm, already freed
509 * flag is set in regexec.c:S_regtry
511 SvFLAGS(resv) &= ~SVf_BREAK;
513 else if(SvREPADTMP(resv)) {
514 SvREPADTMP_off(resv);
521 SvREFCNT_dec(PL_regex_padav);
522 PL_regex_padav = Nullav;
526 SvREFCNT_dec((SV*) PL_stashcache);
527 PL_stashcache = NULL;
529 /* loosen bonds of global variables */
532 (void)PerlIO_close(PL_rsfp);
536 /* Filters for program text */
537 SvREFCNT_dec(PL_rsfp_filters);
538 PL_rsfp_filters = Nullav;
541 PL_preprocess = FALSE;
547 PL_doswitches = FALSE;
548 PL_dowarn = G_WARN_OFF;
549 PL_doextract = FALSE;
550 PL_sawampersand = FALSE; /* must save all match strings */
553 Safefree(PL_inplace);
555 SvREFCNT_dec(PL_patchlevel);
558 SvREFCNT_dec(PL_e_script);
559 PL_e_script = Nullsv;
564 /* magical thingies */
566 SvREFCNT_dec(PL_ofs_sv); /* $, */
569 SvREFCNT_dec(PL_ors_sv); /* $\ */
572 SvREFCNT_dec(PL_rs); /* $/ */
575 PL_multiline = 0; /* $* */
576 Safefree(PL_osname); /* $^O */
579 SvREFCNT_dec(PL_statname);
580 PL_statname = Nullsv;
583 /* defgv, aka *_ should be taken care of elsewhere */
585 /* clean up after study() */
586 SvREFCNT_dec(PL_lastscream);
587 PL_lastscream = Nullsv;
588 Safefree(PL_screamfirst);
590 Safefree(PL_screamnext);
594 Safefree(PL_efloatbuf);
595 PL_efloatbuf = Nullch;
598 /* startup and shutdown function lists */
599 SvREFCNT_dec(PL_beginav);
600 SvREFCNT_dec(PL_beginav_save);
601 SvREFCNT_dec(PL_endav);
602 SvREFCNT_dec(PL_checkav);
603 SvREFCNT_dec(PL_checkav_save);
604 SvREFCNT_dec(PL_initav);
606 PL_beginav_save = Nullav;
609 PL_checkav_save = Nullav;
612 /* shortcuts just get cleared */
618 PL_argvoutgv = Nullgv;
620 PL_stderrgv = Nullgv;
621 PL_last_in_gv = Nullgv;
626 PL_DBsingle = Nullsv;
628 PL_DBsignal = Nullsv;
629 PL_DBassertion = Nullsv;
632 PL_debstash = Nullhv;
634 SvREFCNT_dec(PL_argvout_stack);
635 PL_argvout_stack = Nullav;
637 SvREFCNT_dec(PL_modglobal);
638 PL_modglobal = Nullhv;
639 SvREFCNT_dec(PL_preambleav);
640 PL_preambleav = Nullav;
641 SvREFCNT_dec(PL_subname);
643 SvREFCNT_dec(PL_linestr);
645 SvREFCNT_dec(PL_pidstatus);
646 PL_pidstatus = Nullhv;
647 SvREFCNT_dec(PL_toptarget);
648 PL_toptarget = Nullsv;
649 SvREFCNT_dec(PL_bodytarget);
650 PL_bodytarget = Nullsv;
651 PL_formtarget = Nullsv;
653 /* free locale stuff */
654 #ifdef USE_LOCALE_COLLATE
655 Safefree(PL_collation_name);
656 PL_collation_name = Nullch;
659 #ifdef USE_LOCALE_NUMERIC
660 Safefree(PL_numeric_name);
661 PL_numeric_name = Nullch;
662 SvREFCNT_dec(PL_numeric_radix_sv);
663 PL_numeric_radix_sv = Nullsv;
666 /* clear utf8 character classes */
667 SvREFCNT_dec(PL_utf8_alnum);
668 SvREFCNT_dec(PL_utf8_alnumc);
669 SvREFCNT_dec(PL_utf8_ascii);
670 SvREFCNT_dec(PL_utf8_alpha);
671 SvREFCNT_dec(PL_utf8_space);
672 SvREFCNT_dec(PL_utf8_cntrl);
673 SvREFCNT_dec(PL_utf8_graph);
674 SvREFCNT_dec(PL_utf8_digit);
675 SvREFCNT_dec(PL_utf8_upper);
676 SvREFCNT_dec(PL_utf8_lower);
677 SvREFCNT_dec(PL_utf8_print);
678 SvREFCNT_dec(PL_utf8_punct);
679 SvREFCNT_dec(PL_utf8_xdigit);
680 SvREFCNT_dec(PL_utf8_mark);
681 SvREFCNT_dec(PL_utf8_toupper);
682 SvREFCNT_dec(PL_utf8_totitle);
683 SvREFCNT_dec(PL_utf8_tolower);
684 SvREFCNT_dec(PL_utf8_tofold);
685 SvREFCNT_dec(PL_utf8_idstart);
686 SvREFCNT_dec(PL_utf8_idcont);
687 PL_utf8_alnum = Nullsv;
688 PL_utf8_alnumc = Nullsv;
689 PL_utf8_ascii = Nullsv;
690 PL_utf8_alpha = Nullsv;
691 PL_utf8_space = Nullsv;
692 PL_utf8_cntrl = Nullsv;
693 PL_utf8_graph = Nullsv;
694 PL_utf8_digit = Nullsv;
695 PL_utf8_upper = Nullsv;
696 PL_utf8_lower = Nullsv;
697 PL_utf8_print = Nullsv;
698 PL_utf8_punct = Nullsv;
699 PL_utf8_xdigit = Nullsv;
700 PL_utf8_mark = Nullsv;
701 PL_utf8_toupper = Nullsv;
702 PL_utf8_totitle = Nullsv;
703 PL_utf8_tolower = Nullsv;
704 PL_utf8_tofold = Nullsv;
705 PL_utf8_idstart = Nullsv;
706 PL_utf8_idcont = Nullsv;
708 if (!specialWARN(PL_compiling.cop_warnings))
709 SvREFCNT_dec(PL_compiling.cop_warnings);
710 PL_compiling.cop_warnings = Nullsv;
711 if (!specialCopIO(PL_compiling.cop_io))
712 SvREFCNT_dec(PL_compiling.cop_io);
713 PL_compiling.cop_io = Nullsv;
714 CopFILE_free(&PL_compiling);
715 CopSTASH_free(&PL_compiling);
717 /* Prepare to destruct main symbol table. */
722 SvREFCNT_dec(PL_curstname);
723 PL_curstname = Nullsv;
725 /* clear queued errors */
726 SvREFCNT_dec(PL_errors);
730 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
731 if (PL_scopestack_ix != 0)
732 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
733 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
734 (long)PL_scopestack_ix);
735 if (PL_savestack_ix != 0)
736 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
737 "Unbalanced saves: %ld more saves than restores\n",
738 (long)PL_savestack_ix);
739 if (PL_tmps_floor != -1)
740 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
741 (long)PL_tmps_floor + 1);
742 if (cxstack_ix != -1)
743 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
744 (long)cxstack_ix + 1);
747 /* Now absolutely destruct everything, somehow or other, loops or no. */
748 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
749 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
751 /* the 2 is for PL_fdpid and PL_strtab */
752 while (PL_sv_count > 2 && sv_clean_all())
755 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
756 SvFLAGS(PL_fdpid) |= SVt_PVAV;
757 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
758 SvFLAGS(PL_strtab) |= SVt_PVHV;
760 AvREAL_off(PL_fdpid); /* no surviving entries */
761 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
764 #ifdef HAVE_INTERP_INTERN
768 /* Destruct the global string table. */
770 /* Yell and reset the HeVAL() slots that are still holding refcounts,
771 * so that sv_free() won't fail on them.
779 max = HvMAX(PL_strtab);
780 array = HvARRAY(PL_strtab);
783 if (hent && ckWARN_d(WARN_INTERNAL)) {
784 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
785 "Unbalanced string table refcount: (%d) for \"%s\"",
786 HeVAL(hent) - Nullsv, HeKEY(hent));
787 HeVAL(hent) = Nullsv;
797 SvREFCNT_dec(PL_strtab);
800 /* free the pointer table used for cloning */
801 ptr_table_free(PL_ptr_table);
802 PL_ptr_table = (PTR_TBL_t*)NULL;
805 /* free special SVs */
807 SvREFCNT(&PL_sv_yes) = 0;
808 sv_clear(&PL_sv_yes);
809 SvANY(&PL_sv_yes) = NULL;
810 SvFLAGS(&PL_sv_yes) = 0;
812 SvREFCNT(&PL_sv_no) = 0;
814 SvANY(&PL_sv_no) = NULL;
815 SvFLAGS(&PL_sv_no) = 0;
819 for (i=0; i<=2; i++) {
820 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
821 sv_clear(PERL_DEBUG_PAD(i));
822 SvANY(PERL_DEBUG_PAD(i)) = NULL;
823 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
827 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
828 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
830 #ifdef DEBUG_LEAKING_SCALARS
831 if (PL_sv_count != 0) {
836 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
837 svend = &sva[SvREFCNT(sva)];
838 for (sv = sva + 1; sv < svend; ++sv) {
839 if (SvTYPE(sv) != SVTYPEMASK) {
840 PerlIO_printf(Perl_debug_log, "leaked: 0x%p"
851 #if defined(PERLIO_LAYERS)
852 /* No more IO - including error messages ! */
853 PerlIO_cleanup(aTHX);
856 /* sv_undef needs to stay immortal until after PerlIO_cleanup
857 as currently layers use it rather than Nullsv as a marker
858 for no arg - and will try and SvREFCNT_dec it.
860 SvREFCNT(&PL_sv_undef) = 0;
861 SvREADONLY_off(&PL_sv_undef);
863 Safefree(PL_origfilename);
864 PL_origfilename = Nullch;
865 Safefree(PL_reg_start_tmp);
866 PL_reg_start_tmp = (char**)NULL;
867 PL_reg_start_tmpl = 0;
869 Safefree(PL_reg_curpm);
870 Safefree(PL_reg_poscache);
872 Safefree(PL_op_mask);
873 Safefree(PL_psig_ptr);
874 PL_psig_ptr = (SV**)NULL;
875 Safefree(PL_psig_name);
876 PL_psig_name = (SV**)NULL;
877 Safefree(PL_bitcount);
878 PL_bitcount = Nullch;
879 Safefree(PL_psig_pend);
880 PL_psig_pend = (int*)NULL;
881 PL_formfeed = Nullsv;
886 PL_taint_warn = FALSE;
887 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
890 DEBUG_P(debprofdump());
892 #ifdef USE_REENTRANT_API
893 Perl_reentrant_free(aTHX);
898 /* As the absolutely last thing, free the non-arena SV for mess() */
901 /* it could have accumulated taint magic */
902 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
905 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
906 moremagic = mg->mg_moremagic;
907 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
909 Safefree(mg->mg_ptr);
913 /* we know that type >= SVt_PV */
914 SvOOK_off(PL_mess_sv);
915 Safefree(SvPVX(PL_mess_sv));
916 Safefree(SvANY(PL_mess_sv));
917 Safefree(PL_mess_sv);
920 return STATUS_NATIVE_EXPORT;
924 =for apidoc perl_free
926 Releases a Perl interpreter. See L<perlembed>.
934 #if defined(WIN32) || defined(NETWARE)
935 # if defined(PERL_IMPLICIT_SYS)
937 void *host = nw_internal_host;
939 void *host = w32_internal_host;
943 nw_delete_internal_host(host);
945 win32_delete_internal_host(host);
956 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
958 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
959 PL_exitlist[PL_exitlistlen].fn = fn;
960 PL_exitlist[PL_exitlistlen].ptr = ptr;
965 =for apidoc perl_parse
967 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
973 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
978 #ifdef USE_5005THREADS
982 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
985 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
986 setuid perl scripts securely.\n");
990 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
991 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
992 * This MUST be done before any hash stores or fetches take place.
993 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
994 * yourself, it is your responsibility to provide a good random seed!
995 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
996 if (!PL_rehash_seed_set)
997 PL_rehash_seed = get_hash_seed();
999 char *s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1005 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n",
1009 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1015 /* Set PL_origalen be the sum of the contiguous argv[]
1016 * elements plus the size of the env in case that it is
1017 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1018 * as the maximum modifiable length of $0. In the worst case
1019 * the area we are able to modify is limited to the size of
1020 * the original argv[0]. (See below for 'contiguous', though.)
1025 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1026 /* Do the mask check only if the args seem like aligned. */
1028 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1030 /* See if all the arguments are contiguous in memory. Note
1031 * that 'contiguous' is a loose term because some platforms
1032 * align the argv[] and the envp[]. If the arguments look
1033 * like non-aligned, assume that they are 'strictly' or
1034 * 'traditionally' contiguous. If the arguments look like
1035 * aligned, we just check that they are within aligned
1036 * PTRSIZE bytes. As long as no system has something bizarre
1037 * like the argv[] interleaved with some other data, we are
1038 * fine. (Did I just evoke Murphy's Law?) --jhi */
1039 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1041 for (i = 1; i < PL_origargc; i++) {
1042 if ((PL_origargv[i] == s + 1
1044 || PL_origargv[i] == s + 2
1049 (PL_origargv[i] > s &&
1051 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1061 /* Can we grab env area too to be used as the area for $0? */
1062 if (PL_origenviron) {
1063 if ((PL_origenviron[0] == s + 1
1065 || (PL_origenviron[0] == s + 9 && (s += 8))
1070 (PL_origenviron[0] > s &&
1071 PL_origenviron[0] <=
1072 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1076 s = PL_origenviron[0];
1079 my_setenv("NoNe SuCh", Nullch);
1080 /* Force copy of environment. */
1081 for (i = 1; PL_origenviron[i]; i++) {
1082 if (PL_origenviron[i] == s + 1
1085 (PL_origenviron[i] > s &&
1086 PL_origenviron[i] <=
1087 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1090 s = PL_origenviron[i];
1098 PL_origalen = s - PL_origargv[0] + 1;
1103 /* Come here if running an undumped a.out. */
1105 PL_origfilename = savepv(argv[0]);
1106 PL_do_undump = FALSE;
1107 cxstack_ix = -1; /* start label stack again */
1109 init_postdump_symbols(argc,argv,env);
1114 op_free(PL_main_root);
1115 PL_main_root = Nullop;
1117 PL_main_start = Nullop;
1118 SvREFCNT_dec(PL_main_cv);
1119 PL_main_cv = Nullcv;
1122 oldscope = PL_scopestack_ix;
1123 PL_dowarn = G_WARN_OFF;
1125 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1126 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vparse_body), env, xsinit);
1132 #ifndef PERL_FLEXIBLE_EXCEPTIONS
1133 parse_body(env,xsinit);
1136 call_list(oldscope, PL_checkav);
1143 /* my_exit() was called */
1144 while (PL_scopestack_ix > oldscope)
1147 PL_curstash = PL_defstash;
1149 call_list(oldscope, PL_checkav);
1150 ret = STATUS_NATIVE_EXPORT;
1153 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1161 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1163 S_vparse_body(pTHX_ va_list args)
1165 char **env = va_arg(args, char**);
1166 XSINIT_t xsinit = va_arg(args, XSINIT_t);
1168 return parse_body(env, xsinit);
1173 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1175 int argc = PL_origargc;
1176 char **argv = PL_origargv;
1177 char *scriptname = NULL;
1178 VOL bool dosearch = FALSE;
1179 char *validarg = "";
1182 char *cddir = Nullch;
1186 sv_setpvn(PL_linestr,"",0);
1187 sv = newSVpvn("",0); /* first used for -I flags */
1191 for (argc--,argv++; argc > 0; argc--,argv++) {
1192 if (argv[0][0] != '-' || !argv[0][1])
1196 validarg = " PHOOEY ";
1200 * Can we rely on the kernel to start scripts with argv[1] set to
1201 * contain all #! line switches (the whole line)? (argv[0] is set to
1202 * the interpreter name, argv[2] to the script name; argv[3] and
1203 * above may contain other arguments.)
1210 #ifndef PERL_STRICT_CR
1235 if ((s = moreswitches(s)))
1240 CHECK_MALLOC_TOO_LATE_FOR('t');
1241 if( !PL_tainting ) {
1242 PL_taint_warn = TRUE;
1248 CHECK_MALLOC_TOO_LATE_FOR('T');
1250 PL_taint_warn = FALSE;
1255 #ifdef MACOS_TRADITIONAL
1256 /* ignore -e for Dev:Pseudo argument */
1257 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1262 PL_e_script = newSVpvn("",0);
1263 filter_add(read_e_script, NULL);
1266 sv_catpv(PL_e_script, s);
1268 sv_catpv(PL_e_script, argv[1]);
1272 Perl_croak(aTHX_ "No code specified for -e");
1273 sv_catpv(PL_e_script, "\n");
1276 case 'I': /* -I handled both here and in moreswitches() */
1278 if (!*++s && (s=argv[1]) != Nullch) {
1283 STRLEN len = strlen(s);
1284 p = savepvn(s, len);
1285 incpush(p, TRUE, TRUE, FALSE);
1286 sv_catpvn(sv, "-I", 2);
1287 sv_catpvn(sv, p, len);
1288 sv_catpvn(sv, " ", 1);
1292 Perl_croak(aTHX_ "No directory specified for -I");
1296 PL_preprocess = TRUE;
1306 PL_preambleav = newAV();
1307 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
1309 PL_Sv = newSVpv("print myconfig();",0);
1311 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
1313 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
1315 sv_catpv(PL_Sv,"\" Compile-time options:");
1317 sv_catpv(PL_Sv," DEBUGGING");
1319 # ifdef MULTIPLICITY
1320 sv_catpv(PL_Sv," MULTIPLICITY");
1322 # ifdef USE_5005THREADS
1323 sv_catpv(PL_Sv," USE_5005THREADS");
1325 # ifdef USE_ITHREADS
1326 sv_catpv(PL_Sv," USE_ITHREADS");
1328 # ifdef USE_64_BIT_INT
1329 sv_catpv(PL_Sv," USE_64_BIT_INT");
1331 # ifdef USE_64_BIT_ALL
1332 sv_catpv(PL_Sv," USE_64_BIT_ALL");
1334 # ifdef USE_LONG_DOUBLE
1335 sv_catpv(PL_Sv," USE_LONG_DOUBLE");
1337 # ifdef USE_LARGE_FILES
1338 sv_catpv(PL_Sv," USE_LARGE_FILES");
1341 sv_catpv(PL_Sv," USE_SOCKS");
1343 # ifdef PERL_IMPLICIT_CONTEXT
1344 sv_catpv(PL_Sv," PERL_IMPLICIT_CONTEXT");
1346 # ifdef PERL_IMPLICIT_SYS
1347 sv_catpv(PL_Sv," PERL_IMPLICIT_SYS");
1349 sv_catpv(PL_Sv,"\\n\",");
1351 #if defined(LOCAL_PATCH_COUNT)
1352 if (LOCAL_PATCH_COUNT > 0) {
1354 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
1355 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1356 if (PL_localpatches[i])
1357 Perl_sv_catpvf(aTHX_ PL_Sv,"q%c\t%s\n%c,",
1358 0, PL_localpatches[i], 0);
1362 Perl_sv_catpvf(aTHX_ PL_Sv,"\" Built under %s\\n\"",OSNAME);
1365 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
1367 Perl_sv_catpvf(aTHX_ PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
1370 sv_catpv(PL_Sv, "; \
1372 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; ");
1375 push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1378 print \" \\%ENV:\\n @env\\n\" if @env; \
1379 print \" \\@INC:\\n @INC\\n\";");
1382 PL_Sv = newSVpv("config_vars(qw(",0);
1383 sv_catpv(PL_Sv, ++s);
1384 sv_catpv(PL_Sv, "))");
1387 av_push(PL_preambleav, PL_Sv);
1388 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1391 PL_doextract = TRUE;
1399 if (!*++s || isSPACE(*s)) {
1403 /* catch use of gnu style long options */
1404 if (strEQ(s, "version")) {
1408 if (strEQ(s, "help")) {
1415 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1421 #ifndef SECURE_INTERNAL_GETENV
1424 (s = PerlEnv_getenv("PERL5OPT")))
1429 if (*s == '-' && *(s+1) == 'T') {
1430 CHECK_MALLOC_TOO_LATE_FOR('T');
1432 PL_taint_warn = FALSE;
1435 char *popt_copy = Nullch;
1448 if (!strchr("DIMUdmtwA", *s))
1449 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1453 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1454 s = popt_copy + (s - popt);
1455 d = popt_copy + (d - popt);
1462 if( !PL_tainting ) {
1463 PL_taint_warn = TRUE;
1473 if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) {
1474 PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize);
1478 scriptname = argv[0];
1481 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1483 else if (scriptname == Nullch) {
1485 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1493 open_script(scriptname,dosearch,sv);
1495 validate_suid(validarg, scriptname);
1498 #if defined(SIGCHLD) || defined(SIGCLD)
1501 # define SIGCHLD SIGCLD
1503 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1504 if (sigstate == SIG_IGN) {
1505 if (ckWARN(WARN_SIGNAL))
1506 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1507 "Can't ignore signal CHLD, forcing to default");
1508 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1514 #ifdef MACOS_TRADITIONAL
1515 if (PL_doextract || gMacPerl_AlwaysExtract) {
1520 if (cddir && PerlDir_chdir(cddir) < 0)
1521 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
1525 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
1526 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1527 CvUNIQUE_on(PL_compcv);
1529 CvPADLIST(PL_compcv) = pad_new(0);
1530 #ifdef USE_5005THREADS
1531 CvOWNER(PL_compcv) = 0;
1532 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
1533 MUTEX_INIT(CvMUTEXP(PL_compcv));
1534 #endif /* USE_5005THREADS */
1537 boot_core_UNIVERSAL();
1538 boot_core_xsutils();
1541 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
1543 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC)
1549 # ifdef HAS_SOCKS5_INIT
1550 socks5_init(argv[0]);
1556 init_predump_symbols();
1557 /* init_postdump_symbols not currently designed to be called */
1558 /* more than once (ENV isn't cleared first, for example) */
1559 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
1561 init_postdump_symbols(argc,argv,env);
1563 /* PL_unicode is turned on by -C or by $ENV{PERL_UNICODE}.
1564 * PL_utf8locale is conditionally turned on by
1565 * locale.c:Perl_init_i18nl10n() if the environment
1566 * look like the user wants to use UTF-8. */
1568 /* Requires init_predump_symbols(). */
1569 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
1574 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
1575 * and the default open disciplines. */
1576 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
1577 PL_stdingv && (io = GvIO(PL_stdingv)) &&
1579 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1580 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
1581 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
1583 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1584 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
1585 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
1587 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
1588 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
1589 (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) {
1590 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
1591 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
1594 sv_setpvn(sv, ":utf8\0:utf8", 11);
1596 sv_setpvn(sv, ":utf8\0", 6);
1599 sv_setpvn(sv, "\0:utf8", 6);
1605 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
1606 if (strEQ(s, "unsafe"))
1607 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
1608 else if (strEQ(s, "safe"))
1609 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
1611 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
1616 /* now parse the script */
1618 SETERRNO(0,SS_NORMAL);
1620 #ifdef MACOS_TRADITIONAL
1621 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
1623 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
1625 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1626 MacPerl_MPWFileName(PL_origfilename));
1630 if (yyparse() || PL_error_count) {
1632 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
1634 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
1639 CopLINE_set(PL_curcop, 0);
1640 PL_curstash = PL_defstash;
1641 PL_preprocess = FALSE;
1643 SvREFCNT_dec(PL_e_script);
1644 PL_e_script = Nullsv;
1651 SAVECOPFILE(PL_curcop);
1652 SAVECOPLINE(PL_curcop);
1653 gv_check(PL_defstash);
1660 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1661 dump_mstats("after compilation:");
1670 =for apidoc perl_run
1672 Tells a Perl interpreter to run. See L<perlembed>.
1683 #ifdef USE_5005THREADS
1687 oldscope = PL_scopestack_ix;
1692 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1694 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vrun_body), oldscope);
1700 cxstack_ix = -1; /* start context stack again */
1702 case 0: /* normal completion */
1703 #ifndef PERL_FLEXIBLE_EXCEPTIONS
1708 case 2: /* my_exit() */
1709 while (PL_scopestack_ix > oldscope)
1712 PL_curstash = PL_defstash;
1713 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
1714 PL_endav && !PL_minus_c)
1715 call_list(oldscope, PL_endav);
1717 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1718 dump_mstats("after execution: ");
1720 ret = STATUS_NATIVE_EXPORT;
1724 POPSTACK_TO(PL_mainstack);
1727 PerlIO_printf(Perl_error_log, "panic: restartop\n");
1737 #ifdef PERL_FLEXIBLE_EXCEPTIONS
1739 S_vrun_body(pTHX_ va_list args)
1741 I32 oldscope = va_arg(args, I32);
1743 return run_body(oldscope);
1749 S_run_body(pTHX_ I32 oldscope)
1751 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1752 PL_sawampersand ? "Enabling" : "Omitting"));
1754 if (!PL_restartop) {
1755 DEBUG_x(dump_all());
1757 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1758 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
1762 #ifdef MACOS_TRADITIONAL
1763 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
1764 (gMacPerl_ErrorFormat ? "# " : ""),
1765 MacPerl_MPWFileName(PL_origfilename));
1767 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
1771 if (PERLDB_SINGLE && PL_DBsingle)
1772 sv_setiv(PL_DBsingle, 1);
1774 call_list(oldscope, PL_initav);
1780 PL_op = PL_restartop;
1784 else if (PL_main_start) {
1785 CvDEPTH(PL_main_cv) = 1;
1786 PL_op = PL_main_start;
1796 =head1 SV Manipulation Functions
1798 =for apidoc p||get_sv
1800 Returns the SV of the specified Perl scalar. If C<create> is set and the
1801 Perl variable does not exist then it will be created. If C<create> is not
1802 set and the variable does not exist then NULL is returned.
1808 Perl_get_sv(pTHX_ const char *name, I32 create)
1811 #ifdef USE_5005THREADS
1812 if (name[1] == '\0' && !isALPHA(name[0])) {
1813 PADOFFSET tmp = find_threadsv(name);
1814 if (tmp != NOT_IN_PAD)
1815 return THREADSV(tmp);
1817 #endif /* USE_5005THREADS */
1818 gv = gv_fetchpv(name, create, SVt_PV);
1825 =head1 Array Manipulation Functions
1827 =for apidoc p||get_av
1829 Returns the AV of the specified Perl array. If C<create> is set and the
1830 Perl variable does not exist then it will be created. If C<create> is not
1831 set and the variable does not exist then NULL is returned.
1837 Perl_get_av(pTHX_ const char *name, I32 create)
1839 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1848 =head1 Hash Manipulation Functions
1850 =for apidoc p||get_hv
1852 Returns the HV of the specified Perl hash. If C<create> is set and the
1853 Perl variable does not exist then it will be created. If C<create> is not
1854 set and the variable does not exist then NULL is returned.
1860 Perl_get_hv(pTHX_ const char *name, I32 create)
1862 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1871 =head1 CV Manipulation Functions
1873 =for apidoc p||get_cv
1875 Returns the CV of the specified Perl subroutine. If C<create> is set and
1876 the Perl subroutine does not exist then it will be declared (which has the
1877 same effect as saying C<sub name;>). If C<create> is not set and the
1878 subroutine does not exist then NULL is returned.
1884 Perl_get_cv(pTHX_ const char *name, I32 create)
1886 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1887 /* XXX unsafe for threads if eval_owner isn't held */
1888 /* XXX this is probably not what they think they're getting.
1889 * It has the same effect as "sub name;", i.e. just a forward
1891 if (create && !GvCVu(gv))
1892 return newSUB(start_subparse(FALSE, 0),
1893 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1901 /* Be sure to refetch the stack pointer after calling these routines. */
1905 =head1 Callback Functions
1907 =for apidoc p||call_argv
1909 Performs a callback to the specified Perl sub. See L<perlcall>.
1915 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
1917 /* See G_* flags in cop.h */
1918 /* null terminated arg list */
1925 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1930 return call_pv(sub_name, flags);
1934 =for apidoc p||call_pv
1936 Performs a callback to the specified Perl sub. See L<perlcall>.
1942 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
1943 /* name of the subroutine */
1944 /* See G_* flags in cop.h */
1946 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
1950 =for apidoc p||call_method
1952 Performs a callback to the specified Perl method. The blessed object must
1953 be on the stack. See L<perlcall>.
1959 Perl_call_method(pTHX_ const char *methname, I32 flags)
1960 /* name of the subroutine */
1961 /* See G_* flags in cop.h */
1963 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
1966 /* May be called with any of a CV, a GV, or an SV containing the name. */
1968 =for apidoc p||call_sv
1970 Performs a callback to the Perl sub whose name is in the SV. See
1977 Perl_call_sv(pTHX_ SV *sv, I32 flags)
1978 /* See G_* flags in cop.h */
1981 LOGOP myop; /* fake syntax tree node */
1984 volatile I32 retval = 0;
1986 bool oldcatch = CATCH_GET;
1991 if (flags & G_DISCARD) {
1996 Zero(&myop, 1, LOGOP);
1997 myop.op_next = Nullop;
1998 if (!(flags & G_NOARGS))
1999 myop.op_flags |= OPf_STACKED;
2000 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2001 (flags & G_ARRAY) ? OPf_WANT_LIST :
2006 EXTEND(PL_stack_sp, 1);
2007 *++PL_stack_sp = sv;
2009 oldscope = PL_scopestack_ix;
2011 if (PERLDB_SUB && PL_curstash != PL_debstash
2012 /* Handle first BEGIN of -d. */
2013 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2014 /* Try harder, since this may have been a sighandler, thus
2015 * curstash may be meaningless. */
2016 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2017 && !(flags & G_NODEBUG))
2018 PL_op->op_private |= OPpENTERSUB_DB;
2020 if (flags & G_METHOD) {
2021 Zero(&method_op, 1, UNOP);
2022 method_op.op_next = PL_op;
2023 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2024 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2025 PL_op = (OP*)&method_op;
2028 if (!(flags & G_EVAL)) {
2030 call_body((OP*)&myop, FALSE);
2031 retval = PL_stack_sp - (PL_stack_base + oldmark);
2032 CATCH_SET(oldcatch);
2035 myop.op_other = (OP*)&myop;
2037 /* we're trying to emulate pp_entertry() here */
2039 register PERL_CONTEXT *cx;
2040 I32 gimme = GIMME_V;
2045 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
2047 PL_eval_root = PL_op; /* Only needed so that goto works right. */
2049 PL_in_eval = EVAL_INEVAL;
2050 if (flags & G_KEEPERR)
2051 PL_in_eval |= EVAL_KEEPERR;
2057 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2059 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
2066 #ifndef PERL_FLEXIBLE_EXCEPTIONS
2068 call_body((OP*)&myop, FALSE);
2070 retval = PL_stack_sp - (PL_stack_base + oldmark);
2071 if (!(flags & G_KEEPERR))
2078 /* my_exit() was called */
2079 PL_curstash = PL_defstash;
2082 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2083 Perl_croak(aTHX_ "Callback called exit");
2088 PL_op = PL_restartop;
2092 PL_stack_sp = PL_stack_base + oldmark;
2093 if (flags & G_ARRAY)
2097 *++PL_stack_sp = &PL_sv_undef;
2102 if (PL_scopestack_ix > oldscope) {
2106 register PERL_CONTEXT *cx;
2117 if (flags & G_DISCARD) {
2118 PL_stack_sp = PL_stack_base + oldmark;
2127 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2129 S_vcall_body(pTHX_ va_list args)
2131 OP *myop = va_arg(args, OP*);
2132 int is_eval = va_arg(args, int);
2134 call_body(myop, is_eval);
2140 S_call_body(pTHX_ OP *myop, int is_eval)
2142 if (PL_op == myop) {
2144 PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */
2146 PL_op = Perl_pp_entersub(aTHX); /* this does */
2152 /* Eval a string. The G_EVAL flag is always assumed. */
2155 =for apidoc p||eval_sv
2157 Tells Perl to C<eval> the string in the SV.
2163 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2165 /* See G_* flags in cop.h */
2168 UNOP myop; /* fake syntax tree node */
2169 volatile I32 oldmark = SP - PL_stack_base;
2170 volatile I32 retval = 0;
2176 if (flags & G_DISCARD) {
2183 Zero(PL_op, 1, UNOP);
2184 EXTEND(PL_stack_sp, 1);
2185 *++PL_stack_sp = sv;
2186 oldscope = PL_scopestack_ix;
2188 if (!(flags & G_NOARGS))
2189 myop.op_flags = OPf_STACKED;
2190 myop.op_next = Nullop;
2191 myop.op_type = OP_ENTEREVAL;
2192 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2193 (flags & G_ARRAY) ? OPf_WANT_LIST :
2195 if (flags & G_KEEPERR)
2196 myop.op_flags |= OPf_SPECIAL;
2198 #ifdef PERL_FLEXIBLE_EXCEPTIONS
2200 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_body),
2203 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2204 * before a PUSHEVAL, which corrupts the stack after a croak */
2205 TAINT_PROPER("eval_sv()");
2211 #ifndef PERL_FLEXIBLE_EXCEPTIONS
2213 call_body((OP*)&myop,TRUE);
2215 retval = PL_stack_sp - (PL_stack_base + oldmark);
2216 if (!(flags & G_KEEPERR))
2223 /* my_exit() was called */
2224 PL_curstash = PL_defstash;
2227 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2228 Perl_croak(aTHX_ "Callback called exit");
2233 PL_op = PL_restartop;
2237 PL_stack_sp = PL_stack_base + oldmark;
2238 if (flags & G_ARRAY)
2242 *++PL_stack_sp = &PL_sv_undef;
2248 if (flags & G_DISCARD) {
2249 PL_stack_sp = PL_stack_base + oldmark;
2259 =for apidoc p||eval_pv
2261 Tells Perl to C<eval> the given string and return an SV* result.
2267 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2270 SV* sv = newSVpv(p, 0);
2272 eval_sv(sv, G_SCALAR);
2279 if (croak_on_error && SvTRUE(ERRSV)) {
2281 Perl_croak(aTHX_ SvPVx(ERRSV, n_a));
2287 /* Require a module. */
2290 =head1 Embedding Functions
2292 =for apidoc p||require_pv
2294 Tells Perl to C<require> the file named by the string argument. It is
2295 analogous to the Perl code C<eval "require '$file'">. It's even
2296 implemented that way; consider using load_module instead.
2301 Perl_require_pv(pTHX_ const char *pv)
2305 PUSHSTACKi(PERLSI_REQUIRE);
2307 sv = sv_newmortal();
2308 sv_setpv(sv, "require '");
2311 eval_sv(sv, G_DISCARD);
2317 Perl_magicname(pTHX_ char *sym, char *name, I32 namlen)
2321 if ((gv = gv_fetchpv(sym,TRUE, SVt_PV)))
2322 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2326 S_usage(pTHX_ char *name) /* XXX move this out into a module ? */
2328 /* This message really ought to be max 23 lines.
2329 * Removed -h because the user already knows that option. Others? */
2331 static char *usage_msg[] = {
2332 "-0[octal] specify record separator (\\0, if no argument)",
2333 "-a autosplit mode with -n or -p (splits $_ into @F)",
2334 "-C[number/list] enables the listed Unicode features",
2335 "-c check syntax only (runs BEGIN and CHECK blocks)",
2336 "-d[:debugger] run program under debugger",
2337 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2338 "-e program one line of program (several -e's allowed, omit programfile)",
2339 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2340 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2341 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2342 "-l[octal] enable line ending processing, specifies line terminator",
2343 "-[mM][-]module execute `use/no module...' before executing program",
2344 "-n assume 'while (<>) { ... }' loop around program",
2345 "-p assume loop like -n but print line also, like sed",
2346 "-P run program through C preprocessor before compilation",
2347 "-s enable rudimentary parsing for switches after programfile",
2348 "-S look for programfile using PATH environment variable",
2349 "-t enable tainting warnings",
2350 "-T enable tainting checks",
2351 "-u dump core after parsing program",
2352 "-U allow unsafe operations",
2353 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2354 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2355 "-w enable many useful warnings (RECOMMENDED)",
2356 "-W enable all warnings",
2357 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2358 "-X disable all warnings",
2362 char **p = usage_msg;
2364 PerlIO_printf(PerlIO_stdout(),
2365 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2368 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2371 /* convert a string of -D options (or digits) into an int.
2372 * sets *s to point to the char after the options */
2376 Perl_get_debug_opts(pTHX_ char **s, bool givehelp)
2378 static char *usage_msgd[] = {
2379 " Debugging flag values: (see also -d)",
2380 " p Tokenizing and parsing (with v, displays parse stack)",
2381 " s Stack snapshots (with v, displays all stacks)",
2382 " l Context (loop) stack processing",
2383 " t Trace execution",
2384 " o Method and overloading resolution",
2385 " c String/numeric conversions",
2386 " P Print profiling info, preprocessor command for -P, source file input state",
2387 " m Memory allocation",
2388 " f Format processing",
2389 " r Regular expression parsing and execution",
2390 " x Syntax tree dump",
2391 " u Tainting checks",
2392 " H Hash dump -- usurps values()",
2393 " X Scratchpad allocation",
2395 " S Thread synchronization",
2397 " R Include reference counts of dumped variables (eg when using -Ds)",
2398 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2399 " v Verbose: use in conjunction with other flags",
2401 " A Consistency checks on internal structures",
2402 " q quiet - currently only suppresses the 'EXECUTING' message",
2407 /* if adding extra options, remember to update DEBUG_MASK */
2408 static char debopts[] = "psltocPmfrxu HXDSTRJvCAq";
2410 for (; isALNUM(**s); (*s)++) {
2411 char *d = strchr(debopts,**s);
2413 i |= 1 << (d - debopts);
2414 else if (ckWARN_d(WARN_DEBUGGING))
2415 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2416 "invalid option -D%c, use -D'' to see choices\n", **s);
2419 else if (isDIGIT(**s)) {
2421 for (; isALNUM(**s); (*s)++) ;
2423 else if (givehelp) {
2424 char **p = usage_msgd;
2425 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2428 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2429 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2430 "-Dp not implemented on this platform\n");
2436 /* This routine handles any switches that can be given during run */
2439 Perl_moreswitches(pTHX_ char *s)
2449 SvREFCNT_dec(PL_rs);
2450 if (s[1] == 'x' && s[2]) {
2454 for (s += 2, e = s; *e; e++);
2456 flags = PERL_SCAN_SILENT_ILLDIGIT;
2457 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2458 if (s + numlen < e) {
2459 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2463 PL_rs = newSVpvn("", 0);
2464 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2465 tmps = (U8*)SvPVX(PL_rs);
2466 uvchr_to_utf8(tmps, rschar);
2467 SvCUR_set(PL_rs, UNISKIP(rschar));
2472 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2473 if (rschar & ~((U8)~0))
2474 PL_rs = &PL_sv_undef;
2475 else if (!rschar && numlen >= 2)
2476 PL_rs = newSVpvn("", 0);
2478 char ch = (char)rschar;
2479 PL_rs = newSVpvn(&ch, 1);
2482 sv_setsv(get_sv("/", TRUE), PL_rs);
2487 PL_unicode = parse_unicode_opts(&s);
2492 while (*s && !isSPACE(*s)) ++s;
2494 PL_splitstr = savepv(PL_splitstr);
2508 /* -dt indicates to the debugger that threads will be used */
2509 if (*s == 't' && !isALNUM(s[1])) {
2511 my_setenv("PERL5DB_THREADED", "1");
2514 /* The following permits -d:Mod to accepts arguments following an =
2515 in the fashion that -MSome::Mod does. */
2516 if (*s == ':' || *s == '=') {
2519 sv = newSVpv("use Devel::", 0);
2521 /* We now allow -d:Module=Foo,Bar */
2522 while(isALNUM(*s) || *s==':') ++s;
2524 sv_catpv(sv, start);
2526 sv_catpvn(sv, start, s-start);
2527 sv_catpv(sv, " split(/,/,q{");
2532 my_setenv("PERL5DB", SvPV(sv, PL_na));
2535 PL_perldb = PERLDB_ALL;
2544 PL_debug = get_debug_opts(&s, 1) | DEBUG_TOP_FLAG;
2545 #else /* !DEBUGGING */
2546 if (ckWARN_d(WARN_DEBUGGING))
2547 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2548 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
2549 for (s++; isALNUM(*s); s++) ;
2555 usage(PL_origargv[0]);
2559 Safefree(PL_inplace);
2560 #if defined(__CYGWIN__) /* do backup extension automagically */
2561 if (*(s+1) == '\0') {
2562 PL_inplace = savepv(".bak");
2565 #endif /* __CYGWIN__ */
2566 PL_inplace = savepv(s+1);
2568 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
2571 if (*s == '-') /* Additional switches on #! line. */
2575 case 'I': /* -I handled both here and in parse_body() */
2578 while (*s && isSPACE(*s))
2583 /* ignore trailing spaces (possibly followed by other switches) */
2585 for (e = p; *e && !isSPACE(*e); e++) ;
2589 } while (*p && *p != '-');
2590 e = savepvn(s, e-s);
2591 incpush(e, TRUE, TRUE, FALSE);
2598 Perl_croak(aTHX_ "No directory specified for -I");
2604 SvREFCNT_dec(PL_ors_sv);
2609 PL_ors_sv = newSVpvn("\n",1);
2610 numlen = 3 + (*s == '0');
2611 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
2615 if (RsPARA(PL_rs)) {
2616 PL_ors_sv = newSVpvn("\n\n",2);
2619 PL_ors_sv = newSVsv(PL_rs);
2626 PL_preambleav = newAV();
2628 SV *sv = newSVpv("use assertions::activate split(/,/,q", 0);
2629 sv_catpvn(sv, "\0", 1); /* Use NUL as q//-delimiter. */
2631 sv_catpvn(sv, "\0)", 2);
2633 av_push(PL_preambleav, sv);
2636 av_push(PL_preambleav, newSVpvn("use assertions::activate",24));
2639 forbid_setid("-M"); /* XXX ? */
2642 forbid_setid("-m"); /* XXX ? */
2647 /* -M-foo == 'no foo' */
2648 if (*s == '-') { use = "no "; ++s; }
2649 sv = newSVpv(use,0);
2651 /* We allow -M'Module qw(Foo Bar)' */
2652 while(isALNUM(*s) || *s==':') ++s;
2654 sv_catpv(sv, start);
2655 if (*(start-1) == 'm') {
2657 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
2658 sv_catpv( sv, " ()");
2662 Perl_croak(aTHX_ "Module name required with -%c option",
2664 sv_catpvn(sv, start, s-start);
2665 sv_catpv(sv, " split(/,/,q");
2666 sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */
2668 sv_catpvn(sv, "\0)", 2);
2672 PL_preambleav = newAV();
2673 av_push(PL_preambleav, sv);
2676 Perl_croak(aTHX_ "No space allowed after -%c", *(s-1));
2688 PL_doswitches = TRUE;
2702 #ifdef MACOS_TRADITIONAL
2703 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
2705 PL_do_undump = TRUE;
2713 if (!sv_derived_from(PL_patchlevel, "version"))
2714 (void *)upg_version(PL_patchlevel);
2716 PerlIO_printf(PerlIO_stdout(),
2717 Perl_form(aTHX_ "\nThis is perl, v%_ built for %s",
2718 vstringify(PL_patchlevel),
2721 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
2722 PerlIO_printf(PerlIO_stdout(),
2723 Perl_form(aTHX_ "\nThis is perl, v%_\n",
2724 vstringify(PL_patchlevel)));
2725 PerlIO_printf(PerlIO_stdout(),
2726 Perl_form(aTHX_ " built under %s at %s %s\n",
2727 OSNAME, __DATE__, __TIME__));
2728 PerlIO_printf(PerlIO_stdout(),
2729 Perl_form(aTHX_ " OS Specific Release: %s\n",
2733 #if defined(LOCAL_PATCH_COUNT)
2734 if (LOCAL_PATCH_COUNT > 0)
2735 PerlIO_printf(PerlIO_stdout(),
2736 "\n(with %d registered patch%s, "
2737 "see perl -V for more detail)",
2738 (int)LOCAL_PATCH_COUNT,
2739 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
2742 PerlIO_printf(PerlIO_stdout(),
2743 "\n\nCopyright 1987-2004, Larry Wall\n");
2744 #ifdef MACOS_TRADITIONAL
2745 PerlIO_printf(PerlIO_stdout(),
2746 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
2747 "maintained by Chris Nandor\n");
2750 PerlIO_printf(PerlIO_stdout(),
2751 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
2754 PerlIO_printf(PerlIO_stdout(),
2755 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
2756 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
2759 PerlIO_printf(PerlIO_stdout(),
2760 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
2761 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
2764 PerlIO_printf(PerlIO_stdout(),
2765 "atariST series port, ++jrb bammi@cadence.com\n");
2768 PerlIO_printf(PerlIO_stdout(),
2769 "BeOS port Copyright Tom Spindler, 1997-1999\n");
2772 PerlIO_printf(PerlIO_stdout(),
2773 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
2776 PerlIO_printf(PerlIO_stdout(),
2777 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
2780 PerlIO_printf(PerlIO_stdout(),
2781 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
2784 PerlIO_printf(PerlIO_stdout(),
2785 "VM/ESA port by Neale Ferguson, 1998-1999\n");
2788 PerlIO_printf(PerlIO_stdout(),
2789 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
2792 PerlIO_printf(PerlIO_stdout(),
2793 "MiNT port by Guido Flohr, 1997-1999\n");
2796 PerlIO_printf(PerlIO_stdout(),
2797 "EPOC port by Olaf Flebbe, 1999-2002\n");
2800 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
2801 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
2804 #ifdef BINARY_BUILD_NOTICE
2805 BINARY_BUILD_NOTICE;
2807 PerlIO_printf(PerlIO_stdout(),
2809 Perl may be copied only under the terms of either the Artistic License or the\n\
2810 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
2811 Complete documentation for Perl, including FAQ lists, should be found on\n\
2812 this system using `man perl' or `perldoc perl'. If you have access to the\n\
2813 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
2816 if (! (PL_dowarn & G_WARN_ALL_MASK))
2817 PL_dowarn |= G_WARN_ON;
2821 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
2822 if (!specialWARN(PL_compiling.cop_warnings))
2823 SvREFCNT_dec(PL_compiling.cop_warnings);
2824 PL_compiling.cop_warnings = pWARN_ALL ;
2828 PL_dowarn = G_WARN_ALL_OFF;
2829 if (!specialWARN(PL_compiling.cop_warnings))
2830 SvREFCNT_dec(PL_compiling.cop_warnings);
2831 PL_compiling.cop_warnings = pWARN_NONE ;
2836 if (s[1] == '-') /* Additional switches on #! line. */
2841 #if defined(WIN32) || !defined(PERL_STRICT_CR)
2847 #ifdef ALTERNATE_SHEBANG
2848 case 'S': /* OS/2 needs -S on "extproc" line. */
2856 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
2861 /* compliments of Tom Christiansen */
2863 /* unexec() can be found in the Gnu emacs distribution */
2864 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
2867 Perl_my_unexec(pTHX)
2875 prog = newSVpv(BIN_EXP, 0);
2876 sv_catpv(prog, "/perl");
2877 file = newSVpv(PL_origfilename, 0);
2878 sv_catpv(file, ".perldump");
2880 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
2881 /* unexec prints msg to stderr in case of failure */
2882 PerlProc_exit(status);
2885 # include <lib$routines.h>
2886 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
2888 ABORT(); /* for use with undump */
2893 /* initialize curinterp */
2899 # define PERLVAR(var,type)
2900 # define PERLVARA(var,n,type)
2901 # if defined(PERL_IMPLICIT_CONTEXT)
2902 # if defined(USE_5005THREADS)
2903 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2904 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
2905 # else /* !USE_5005THREADS */
2906 # define PERLVARI(var,type,init) aTHX->var = init;
2907 # define PERLVARIC(var,type,init) aTHX->var = init;
2908 # endif /* USE_5005THREADS */
2910 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
2911 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
2913 # include "intrpvar.h"
2914 # ifndef USE_5005THREADS
2915 # include "thrdvar.h"
2922 # define PERLVAR(var,type)
2923 # define PERLVARA(var,n,type)
2924 # define PERLVARI(var,type,init) PL_##var = init;
2925 # define PERLVARIC(var,type,init) PL_##var = init;
2926 # include "intrpvar.h"
2927 # ifndef USE_5005THREADS
2928 # include "thrdvar.h"
2939 S_init_main_stash(pTHX)
2943 PL_curstash = PL_defstash = newHV();
2944 PL_curstname = newSVpvn("main",4);
2945 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
2946 SvREFCNT_dec(GvHV(gv));
2947 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
2949 HvNAME(PL_defstash) = savepv("main");
2950 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
2951 GvMULTI_on(PL_incgv);
2952 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
2953 GvMULTI_on(PL_hintgv);
2954 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
2955 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
2956 GvMULTI_on(PL_errgv);
2957 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
2958 GvMULTI_on(PL_replgv);
2959 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
2960 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
2961 sv_setpvn(ERRSV, "", 0);
2962 PL_curstash = PL_defstash;
2963 CopSTASH_set(&PL_compiling, PL_defstash);
2964 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
2965 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
2966 /* We must init $/ before switches are processed. */
2967 sv_setpvn(get_sv("/", TRUE), "\n", 1);
2970 /* PSz 18 Nov 03 fdscript now global but do not change prototype */
2972 S_open_script(pTHX_ char *scriptname, bool dosearch, SV *sv)
2977 char *cpp_discard_flag;
2985 PL_origfilename = savepv("-e");
2988 /* if find_script() returns, it returns a malloc()-ed value */
2989 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
2991 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2992 char *s = scriptname + 8;
2993 PL_fdscript = atoi(s);
2998 * Tell apart "normal" usage of fdscript, e.g.
2999 * with bash on FreeBSD:
3000 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3001 * from usage in suidperl.
3002 * Does any "normal" usage leave garbage after the number???
3003 * Is it a mistake to use a similar /dev/fd/ construct for
3008 * Be supersafe and do some sanity-checks.
3009 * Still, can we be sure we got the right thing?
3012 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3015 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3017 scriptname = savepv(s + 1);
3018 Safefree(PL_origfilename);
3019 PL_origfilename = scriptname;
3024 CopFILE_free(PL_curcop);
3025 CopFILE_set(PL_curcop, PL_origfilename);
3026 if (strEQ(PL_origfilename,"-"))
3028 if (PL_fdscript >= 0) {
3029 PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE);
3030 # if defined(HAS_FCNTL) && defined(F_SETFD)
3032 /* ensure close-on-exec */
3033 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3038 Perl_croak(aTHX_ "sperl needs fd script\n"
3039 "You should not call sperl directly; do you need to "
3040 "change a #! line\nfrom sperl to perl?\n");
3043 * Do not open (or do other fancy stuff) while setuid.
3044 * Perl does the open, and hands script to suidperl on a fd;
3045 * suidperl only does some checks, sets up UIDs and re-execs
3046 * perl with that fd as it has always done.
3049 if (PL_suidscript != 1) {
3050 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3053 else if (PL_preprocess) {
3054 char *cpp_cfg = CPPSTDIN;
3055 SV *cpp = newSVpvn("",0);
3056 SV *cmd = NEWSV(0,0);
3058 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3059 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3060 if (strEQ(cpp_cfg, "cppstdin"))
3061 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3062 sv_catpv(cpp, cpp_cfg);
3065 sv_catpvn(sv, "-I", 2);
3066 sv_catpv(sv,PRIVLIB_EXP);
3069 DEBUG_P(PerlIO_printf(Perl_debug_log,
3070 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3071 scriptname, SvPVX (cpp), SvPVX (sv), CPPMINUS));
3073 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3080 cpp_discard_flag = "";
3082 cpp_discard_flag = "-C";
3086 perl = os2_execname(aTHX);
3088 perl = PL_origargv[0];
3092 /* This strips off Perl comments which might interfere with
3093 the C pre-processor, including #!. #line directives are
3094 deliberately stripped to avoid confusion with Perl's version
3095 of #line. FWP played some golf with it so it will fit
3096 into VMS's 255 character buffer.
3099 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3101 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3103 Perl_sv_setpvf(aTHX_ cmd, "\
3104 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3105 perl, quote, code, quote, scriptname, cpp,
3106 cpp_discard_flag, sv, CPPMINUS);
3108 PL_doextract = FALSE;
3110 DEBUG_P(PerlIO_printf(Perl_debug_log,
3111 "PL_preprocess: cmd=\"%s\"\n",
3114 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
3118 else if (!*scriptname) {
3119 forbid_setid("program input from stdin");
3120 PL_rsfp = PerlIO_stdin();
3123 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3124 # if defined(HAS_FCNTL) && defined(F_SETFD)
3126 /* ensure close-on-exec */
3127 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3130 #endif /* IAMSUID */
3132 /* PSz 16 Sep 03 Keep neat error message */
3133 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3134 CopFILE(PL_curcop), Strerror(errno));
3139 * I_SYSSTATVFS HAS_FSTATVFS
3141 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3142 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3143 * here so that metaconfig picks them up. */
3147 S_fd_on_nosuid_fs(pTHX_ int fd)
3150 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3151 * but is needed also on machines without setreuid.
3152 * Seems safe enough to run as root.
3154 int check_okay = 0; /* able to do all the required sys/libcalls */
3155 int on_nosuid = 0; /* the fd is on a nosuid fs */
3157 * Need to check noexec also: nosuid might not be set, the average
3158 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3160 int on_noexec = 0; /* the fd is on a noexec fs */
3163 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3164 * fstatvfs() is UNIX98.
3165 * fstatfs() is 4.3 BSD.
3166 * ustat()+getmnt() is pre-4.3 BSD.
3167 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3168 * an irrelevant filesystem while trying to reach the right one.
3171 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3173 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3174 defined(HAS_FSTATVFS)
3175 # define FD_ON_NOSUID_CHECK_OKAY
3176 struct statvfs stfs;
3178 check_okay = fstatvfs(fd, &stfs) == 0;
3179 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3181 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3182 on platforms where it is present. */
3183 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3185 # endif /* fstatvfs */
3187 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3188 defined(PERL_MOUNT_NOSUID) && \
3189 defined(PERL_MOUNT_NOEXEC) && \
3190 defined(HAS_FSTATFS) && \
3191 defined(HAS_STRUCT_STATFS) && \
3192 defined(HAS_STRUCT_STATFS_F_FLAGS)
3193 # define FD_ON_NOSUID_CHECK_OKAY
3196 check_okay = fstatfs(fd, &stfs) == 0;
3197 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3198 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3199 # endif /* fstatfs */
3201 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3202 defined(PERL_MOUNT_NOSUID) && \
3203 defined(PERL_MOUNT_NOEXEC) && \
3204 defined(HAS_FSTAT) && \
3205 defined(HAS_USTAT) && \
3206 defined(HAS_GETMNT) && \
3207 defined(HAS_STRUCT_FS_DATA) && \
3209 # define FD_ON_NOSUID_CHECK_OKAY
3212 if (fstat(fd, &fdst) == 0) {
3214 if (ustat(fdst.st_dev, &us) == 0) {
3216 /* NOSTAT_ONE here because we're not examining fields which
3217 * vary between that case and STAT_ONE. */
3218 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3219 size_t cmplen = sizeof(us.f_fname);
3220 if (sizeof(fsd.fd_req.path) < cmplen)
3221 cmplen = sizeof(fsd.fd_req.path);
3222 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3223 fdst.st_dev == fsd.fd_req.dev) {
3225 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3226 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3232 # endif /* fstat+ustat+getmnt */
3234 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3235 defined(HAS_GETMNTENT) && \
3236 defined(HAS_HASMNTOPT) && \
3237 defined(MNTOPT_NOSUID) && \
3238 defined(MNTOPT_NOEXEC)
3239 # define FD_ON_NOSUID_CHECK_OKAY
3240 FILE *mtab = fopen("/etc/mtab", "r");
3241 struct mntent *entry;
3244 if (mtab && (fstat(fd, &stb) == 0)) {
3245 while (entry = getmntent(mtab)) {
3246 if (stat(entry->mnt_dir, &fsb) == 0
3247 && fsb.st_dev == stb.st_dev)
3249 /* found the filesystem */
3251 if (hasmntopt(entry, MNTOPT_NOSUID))
3253 if (hasmntopt(entry, MNTOPT_NOEXEC))
3256 } /* A single fs may well fail its stat(). */
3261 # endif /* getmntent+hasmntopt */
3264 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3266 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3268 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3269 return ((!check_okay) || on_nosuid || on_noexec);
3271 #endif /* IAMSUID */
3274 S_validate_suid(pTHX_ char *validarg, char *scriptname)
3278 #endif /* IAMSUID */
3280 /* do we need to emulate setuid on scripts? */
3282 /* This code is for those BSD systems that have setuid #! scripts disabled
3283 * in the kernel because of a security problem. Merely defining DOSUID
3284 * in perl will not fix that problem, but if you have disabled setuid
3285 * scripts in the kernel, this will attempt to emulate setuid and setgid
3286 * on scripts that have those now-otherwise-useless bits set. The setuid
3287 * root version must be called suidperl or sperlN.NNN. If regular perl
3288 * discovers that it has opened a setuid script, it calls suidperl with
3289 * the same argv that it had. If suidperl finds that the script it has
3290 * just opened is NOT setuid root, it sets the effective uid back to the
3291 * uid. We don't just make perl setuid root because that loses the
3292 * effective uid we had before invoking perl, if it was different from the
3295 * Description/comments above do not match current workings:
3296 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3297 * suidperl called with script open and name changed to /dev/fd/N/X;
3298 * suidperl croaks if script is not setuid;
3299 * making perl setuid would be a huge security risk (and yes, that
3300 * would lose any euid we might have had).
3302 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3303 * be defined in suidperl only. suidperl must be setuid root. The
3304 * Configure script will set this up for you if you want it.
3310 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3311 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3312 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3317 if (PL_fdscript < 0 || PL_suidscript != 1)
3318 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3320 * Since the script is opened by perl, not suidperl, some of these
3321 * checks are superfluous. Leaving them in probably does not lower
3325 * Do checks even for systems with no HAS_SETREUID.
3326 * We used to swap, then re-swap UIDs with
3328 if (setreuid(PL_euid,PL_uid) < 0
3329 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3330 Perl_croak(aTHX_ "Can't swap uid and euid");
3333 if (setreuid(PL_uid,PL_euid) < 0
3334 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3335 Perl_croak(aTHX_ "Can't reswap uid and euid");
3339 /* On this access check to make sure the directories are readable,
3340 * there is actually a small window that the user could use to make
3341 * filename point to an accessible directory. So there is a faint
3342 * chance that someone could execute a setuid script down in a
3343 * non-accessible directory. I don't know what to do about that.
3344 * But I don't think it's too important. The manual lies when
3345 * it says access() is useful in setuid programs.
3347 * So, access() is pretty useless... but not harmful... do anyway.
3349 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3350 Perl_croak(aTHX_ "Can't access() script\n");
3353 /* If we can swap euid and uid, then we can determine access rights
3354 * with a simple stat of the file, and then compare device and
3355 * inode to make sure we did stat() on the same file we opened.
3356 * Then we just have to make sure he or she can execute it.
3359 * As the script is opened by perl, not suidperl, we do not need to
3360 * care much about access rights.
3362 * The 'script changed' check is needed, or we can get lied to
3363 * about $0 with e.g.
3364 * suidperl /dev/fd/4//bin/x 4<setuidscript
3365 * Without HAS_SETREUID, is it safe to stat() as root?
3367 * Are there any operating systems that pass /dev/fd/xxx for setuid
3368 * scripts, as suggested/described in perlsec(1)? Surely they do not
3369 * pass the script name as we do, so the "script changed" test would
3370 * fail for them... but we never get here with
3371 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3373 * This is one place where we must "lie" about return status: not
3374 * say if the stat() failed. We are doing this as root, and could
3375 * be tricked into reporting existence or not of files that the
3376 * "plain" user cannot even see.
3380 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3381 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3382 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3383 Perl_croak(aTHX_ "Setuid script changed\n");
3387 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3388 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3391 * We used to do this check as the "plain" user (after swapping
3392 * UIDs). But the check for nosuid and noexec filesystem is needed,
3393 * and should be done even without HAS_SETREUID. (Maybe those
3394 * operating systems do not have such mount options anyway...)
3395 * Seems safe enough to do as root.
3397 #if !defined(NO_NOSUID_CHECK)
3398 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3399 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3402 #endif /* IAMSUID */
3404 if (!S_ISREG(PL_statbuf.st_mode)) {
3405 Perl_croak(aTHX_ "Setuid script not plain file\n");
3407 if (PL_statbuf.st_mode & S_IWOTH)
3408 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3409 PL_doswitches = FALSE; /* -s is insecure in suid */
3410 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3411 CopLINE_inc(PL_curcop);
3412 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
3413 strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */
3414 Perl_croak(aTHX_ "No #! line");
3415 s = SvPV(PL_linestr,n_a)+2;
3417 /* Sanity check on line length */
3418 if (strlen(s) < 1 || strlen(s) > 4000)
3419 Perl_croak(aTHX_ "Very long #! line");
3420 /* Allow more than a single space after #! */
3421 while (isSPACE(*s)) s++;
3422 /* Sanity check on buffer end */
3423 while ((*s) && !isSPACE(*s)) s++;
3424 for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 &&
3425 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
3426 /* Sanity check on buffer start */
3427 if ( (s2-4 < SvPV(PL_linestr,n_a)+2 || strnNE(s2-4,"perl",4)) &&
3428 (s-9 < SvPV(PL_linestr,n_a)+2 || strnNE(s-9,"perl",4)) )
3429 Perl_croak(aTHX_ "Not a perl script");
3430 while (*s == ' ' || *s == '\t') s++;
3432 * #! arg must be what we saw above. They can invoke it by
3433 * mentioning suidperl explicitly, but they may not add any strange
3434 * arguments beyond what #! says if they do invoke suidperl that way.
3437 * The way validarg was set up, we rely on the kernel to start
3438 * scripts with argv[1] set to contain all #! line switches (the
3442 * Check that we got all the arguments listed in the #! line (not
3443 * just that there are no extraneous arguments). Might not matter
3444 * much, as switches from #! line seem to be acted upon (also), and
3445 * so may be checked and trapped in perl. But, security checks must
3446 * be done in suidperl and not deferred to perl. Note that suidperl
3447 * does not get around to parsing (and checking) the switches on
3448 * the #! line (but execs perl sooner).
3449 * Allow (require) a trailing newline (which may be of two
3450 * characters on some architectures?) (but no other trailing
3453 len = strlen(validarg);
3454 if (strEQ(validarg," PHOOEY ") ||
3455 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3456 !(strlen(s) == len+1 || (strlen(s) == len+2 && isSPACE(s[len+1]))))
3457 Perl_croak(aTHX_ "Args must match #! line");
3460 if (PL_fdscript < 0 &&
3461 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3462 PL_euid == PL_statbuf.st_uid)
3464 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3465 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3466 #endif /* IAMSUID */
3468 if (PL_fdscript < 0 &&
3469 PL_euid) { /* oops, we're not the setuid root perl */
3471 * When root runs a setuid script, we do not go through the same
3472 * steps of execing sperl and then perl with fd scripts, but
3473 * simply set up UIDs within the same perl invocation; so do
3474 * not have the same checks (on options, whatever) that we have
3475 * for plain users. No problem really: would have to be a script
3476 * that does not actually work for plain users; and if root is
3477 * foolish and can be persuaded to run such an unsafe script, he
3478 * might run also non-setuid ones, and deserves what he gets.
3480 * Or, we might drop the PL_euid check above (and rely just on
3481 * PL_fdscript to avoid loops), and do the execs
3487 * Pass fd script to suidperl.
3488 * Exec suidperl, substituting fd script for scriptname.
3489 * Pass script name as "subdir" of fd, which perl will grok;
3490 * in fact will use that to distinguish this from "normal"
3491 * usage, see comments above.
3493 PerlIO_rewind(PL_rsfp);
3494 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3495 /* PSz 27 Feb 04 Sanity checks on scriptname */
3496 if ((!scriptname) || (!*scriptname) ) {
3497 Perl_croak(aTHX_ "No setuid script name\n");
3499 if (*scriptname == '-') {
3500 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
3501 /* Or we might confuse it with an option when replacing
3502 * name in argument list, below (though we do pointer, not
3503 * string, comparisons).
3506 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
3507 if (!PL_origargv[which]) {
3508 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
3510 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
3511 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
3512 #if defined(HAS_FCNTL) && defined(F_SETFD)
3513 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
3516 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
3517 (int)PERL_REVISION, (int)PERL_VERSION,
3518 (int)PERL_SUBVERSION), PL_origargv);
3520 #endif /* IAMSUID */
3521 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
3524 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
3526 * This seems back to front: we try HAS_SETEGID first; if not available
3527 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
3528 * in the sense that we only want to set EGID; but are there any machines
3529 * with either of the latter, but not the former? Same with UID, later.
3532 (void)setegid(PL_statbuf.st_gid);
3535 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
3537 #ifdef HAS_SETRESGID
3538 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
3540 PerlProc_setgid(PL_statbuf.st_gid);
3544 if (PerlProc_getegid() != PL_statbuf.st_gid)
3545 Perl_croak(aTHX_ "Can't do setegid!\n");
3547 if (PL_statbuf.st_mode & S_ISUID) {
3548 if (PL_statbuf.st_uid != PL_euid)
3550 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
3553 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
3555 #ifdef HAS_SETRESUID
3556 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
3558 PerlProc_setuid(PL_statbuf.st_uid);
3562 if (PerlProc_geteuid() != PL_statbuf.st_uid)
3563 Perl_croak(aTHX_ "Can't do seteuid!\n");
3565 else if (PL_uid) { /* oops, mustn't run as root */
3567 (void)seteuid((Uid_t)PL_uid);
3570 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
3572 #ifdef HAS_SETRESUID
3573 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
3575 PerlProc_setuid((Uid_t)PL_uid);
3579 if (PerlProc_geteuid() != PL_uid)
3580 Perl_croak(aTHX_ "Can't do seteuid!\n");
3583 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
3584 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
3587 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
3588 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
3589 else if (PL_fdscript < 0 || PL_suidscript != 1)
3590 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
3591 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
3593 /* PSz 16 Sep 03 Keep neat error message */
3594 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
3597 /* We absolutely must clear out any saved ids here, so we */
3598 /* exec the real perl, substituting fd script for scriptname. */
3599 /* (We pass script name as "subdir" of fd, which perl will grok.) */
3601 * It might be thought that using setresgid and/or setresuid (changed to
3602 * set the saved IDs) above might obviate the need to exec, and we could
3603 * go on to "do the perl thing".
3605 * Is there such a thing as "saved GID", and is that set for setuid (but
3606 * not setgid) execution like suidperl? Without exec, it would not be
3607 * cleared for setuid (but not setgid) scripts (or might need a dummy
3610 * We need suidperl to do the exact same argument checking that perl
3611 * does. Thus it cannot be very small; while it could be significantly
3612 * smaller, it is safer (simpler?) to make it essentially the same
3613 * binary as perl (but they are not identical). - Maybe could defer that
3614 * check to the invoked perl, and suidperl be a tiny wrapper instead;
3615 * but prefer to do thorough checks in suidperl itself. Such deferral
3616 * would make suidperl security rely on perl, a design no-no.
3618 * Setuid things should be short and simple, thus easy to understand and
3619 * verify. They should do their "own thing", without influence by
3620 * attackers. It may help if their internal execution flow is fixed,
3621 * regardless of platform: it may be best to exec anyway.
3623 * Suidperl should at least be conceptually simple: a wrapper only,
3624 * never to do any real perl. Maybe we should put
3626 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
3628 * into the perly bits.
3630 PerlIO_rewind(PL_rsfp);
3631 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
3633 * Keep original arguments: suidperl already has fd script.
3635 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
3636 /* if (!PL_origargv[which]) { */
3637 /* errno = EPERM; */
3638 /* Perl_croak(aTHX_ "Permission denied\n"); */
3640 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
3641 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
3642 #if defined(HAS_FCNTL) && defined(F_SETFD)
3643 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
3646 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
3647 (int)PERL_REVISION, (int)PERL_VERSION,
3648 (int)PERL_SUBVERSION), PL_origargv);/* try again */
3650 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
3651 #endif /* IAMSUID */
3653 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3654 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
3655 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3656 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3658 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3661 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3662 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3663 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3664 /* not set-id, must be wrapped */
3670 S_find_beginning(pTHX)
3672 register char *s, *s2;
3673 #ifdef MACOS_TRADITIONAL
3677 /* skip forward in input to the real script? */
3680 #ifdef MACOS_TRADITIONAL
3681 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
3683 while (PL_doextract || gMacPerl_AlwaysExtract) {
3684 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
3685 if (!gMacPerl_AlwaysExtract)
3686 Perl_croak(aTHX_ "No Perl script found in input\n");
3688 if (PL_doextract) /* require explicit override ? */
3689 if (!OverrideExtract(PL_origfilename))
3690 Perl_croak(aTHX_ "User aborted script\n");
3692 PL_doextract = FALSE;
3694 /* Pater peccavi, file does not have #! */
3695 PerlIO_rewind(PL_rsfp);
3700 while (PL_doextract) {
3701 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
3702 Perl_croak(aTHX_ "No Perl script found in input\n");
3705 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3706 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
3707 PL_doextract = FALSE;
3708 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3710 while (*s == ' ' || *s == '\t') s++;
3712 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
3713 if (strnEQ(s2-4,"perl",4))
3715 while ((s = moreswitches(s)))
3718 #ifdef MACOS_TRADITIONAL
3719 /* We are always searching for the #!perl line in MacPerl,
3720 * so if we find it, still keep the line count correct
3721 * by counting lines we already skipped over
3723 for (; maclines > 0 ; maclines--)
3724 PerlIO_ungetc(PL_rsfp, '\n');
3728 /* gMacPerl_AlwaysExtract is false in MPW tool */
3729 } else if (gMacPerl_AlwaysExtract) {
3740 PL_uid = PerlProc_getuid();
3741 PL_euid = PerlProc_geteuid();
3742 PL_gid = PerlProc_getgid();
3743 PL_egid = PerlProc_getegid();
3745 PL_uid |= PL_gid << 16;
3746 PL_euid |= PL_egid << 16;
3748 /* Should not happen: */
3749 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3750 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3753 * Should go by suidscript, not uid!=euid: why disallow
3754 * system("ls") in scripts run from setuid things?
3755 * Or, is this run before we check arguments and set suidscript?
3756 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3757 * (We never have suidscript, can we be sure to have fdscript?)
3758 * Or must then go by UID checks? See comments in forbid_setid also.
3762 /* This is used very early in the lifetime of the program,
3763 * before even the options are parsed, so PL_tainting has
3764 * not been initialized properly. */
3766 Perl_doing_taint(int argc, char *argv[], char *envp[])
3768 #ifndef PERL_IMPLICIT_SYS
3769 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3770 * before we have an interpreter-- and the whole point of this
3771 * function is to be called at such an early stage. If you are on
3772 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3773 * "tainted because running with altered effective ids', you'll
3774 * have to add your own checks somewhere in here. The two most
3775 * known samples of 'implicitness' are Win32 and NetWare, neither
3776 * of which has much of concept of 'uids'. */
3777 int uid = PerlProc_getuid();
3778 int euid = PerlProc_geteuid();
3779 int gid = PerlProc_getgid();
3780 int egid = PerlProc_getegid();
3786 if (uid && (euid != uid || egid != gid))
3788 #endif /* !PERL_IMPLICIT_SYS */
3789 /* This is a really primitive check; environment gets ignored only
3790 * if -T are the first chars together; otherwise one gets
3791 * "Too late" message. */
3792 if ( argc > 1 && argv[1][0] == '-'
3793 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3799 S_forbid_setid(pTHX_ char *s)
3801 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3802 if (PL_euid != PL_uid)
3803 Perl_croak(aTHX_ "No %s allowed while running setuid", s);
3804 if (PL_egid != PL_gid)
3805 Perl_croak(aTHX_ "No %s allowed while running setgid", s);
3806 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3808 * Checks for UID/GID above "wrong": why disallow
3809 * perl -e 'print "Hello\n"'
3810 * from within setuid things?? Simply drop them: replaced by
3811 * fdscript/suidscript and #ifdef IAMSUID checks below.
3813 * This may be too late for command-line switches. Will catch those on
3814 * the #! line, after finding the script name and setting up
3815 * fdscript/suidscript. Note that suidperl does not get around to
3816 * parsing (and checking) the switches on the #! line, but checks that
3817 * the two sets are identical.
3819 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
3820 * instead, or would that be "too late"? (We never have suidscript, can
3821 * we be sure to have fdscript?)
3823 * Catch things with suidscript (in descendant of suidperl), even with
3824 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
3825 * below; but I am paranoid.
3827 * Also see comments about root running a setuid script, elsewhere.
3829 if (PL_suidscript >= 0)
3830 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s);
3832 /* PSz 11 Nov 03 Catch it in suidperl, always! */
3833 Perl_croak(aTHX_ "No %s allowed in suidperl", s);
3834 #endif /* IAMSUID */
3838 Perl_init_debugger(pTHX)
3840 HV *ostash = PL_curstash;
3842 PL_curstash = PL_debstash;
3843 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV))));
3844 AvREAL_off(PL_dbargs);
3845 PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV);
3846 PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3847 PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV));
3848 sv_upgrade(GvSV(PL_DBsub), SVt_IV); /* IVX accessed if PERLDB_SUB_NN */
3849 PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV)));
3850 sv_setiv(PL_DBsingle, 0);
3851 PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV)));
3852 sv_setiv(PL_DBtrace, 0);
3853 PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV)));
3854 sv_setiv(PL_DBsignal, 0);
3855 PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV)));
3856 sv_setiv(PL_DBassertion, 0);
3857 PL_curstash = ostash;
3860 #ifndef STRESS_REALLOC
3861 #define REASONABLE(size) (size)
3863 #define REASONABLE(size) (1) /* unreasonable */
3867 Perl_init_stacks(pTHX)
3869 /* start with 128-item stack and 8K cxstack */
3870 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3871 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3872 PL_curstackinfo->si_type = PERLSI_MAIN;
3873 PL_curstack = PL_curstackinfo->si_stack;
3874 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3876 PL_stack_base = AvARRAY(PL_curstack);
3877 PL_stack_sp = PL_stack_base;
3878 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3880 New(50,PL_tmps_stack,REASONABLE(128),SV*);
3883 PL_tmps_max = REASONABLE(128);
3885 New(54,PL_markstack,REASONABLE(32),I32);
3886 PL_markstack_ptr = PL_markstack;
3887 PL_markstack_max = PL_markstack + REASONABLE(32);
3891 New(54,PL_scopestack,REASONABLE(32),I32);
3892 PL_scopestack_ix = 0;
3893 PL_scopestack_max = REASONABLE(32);
3895 New(54,PL_savestack,REASONABLE(128),ANY);
3896 PL_savestack_ix = 0;
3897 PL_savestack_max = REASONABLE(128);
3905 while (PL_curstackinfo->si_next)
3906 PL_curstackinfo = PL_curstackinfo->si_next;
3907 while (PL_curstackinfo) {
3908 PERL_SI *p = PL_curstackinfo->si_prev;
3909 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3910 Safefree(PL_curstackinfo->si_cxstack);
3911 Safefree(PL_curstackinfo);
3912 PL_curstackinfo = p;
3914 Safefree(PL_tmps_stack);
3915 Safefree(PL_markstack);
3916 Safefree(PL_scopestack);
3917 Safefree(PL_savestack);
3926 lex_start(PL_linestr);
3928 PL_subname = newSVpvn("main",4);
3932 S_init_predump_symbols(pTHX)
3937 sv_setpvn(get_sv("\"", TRUE), " ", 1);
3938 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
3939 GvMULTI_on(PL_stdingv);
3940 io = GvIOp(PL_stdingv);
3941 IoTYPE(io) = IoTYPE_RDONLY;
3942 IoIFP(io) = PerlIO_stdin();
3943 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
3945 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
3947 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
3950 IoTYPE(io) = IoTYPE_WRONLY;
3951 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3953 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
3955 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
3957 PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
3958 GvMULTI_on(PL_stderrgv);
3959 io = GvIOp(PL_stderrgv);
3960 IoTYPE(io) = IoTYPE_WRONLY;
3961 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3962 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
3964 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io);
3966 PL_statname = NEWSV(66,0); /* last filename we did stat on */
3969 Safefree(PL_osname);
3970 PL_osname = savepv(OSNAME);
3974 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3977 argc--,argv++; /* skip name of script */
3978 if (PL_doswitches) {
3979 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3982 if (argv[0][1] == '-' && !argv[0][2]) {
3986 if ((s = strchr(argv[0], '='))) {
3988 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
3991 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
3994 if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) {
3995 GvMULTI_on(PL_argvgv);
3996 (void)gv_AVadd(PL_argvgv);
3997 av_clear(GvAVn(PL_argvgv));
3998 for (; argc > 0; argc--,argv++) {
3999 SV *sv = newSVpv(argv[0],0);
4000 av_push(GvAVn(PL_argvgv),sv);
4001 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4002 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4005 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4006 (void)sv_utf8_decode(sv);
4011 #ifdef HAS_PROCSELFEXE
4012 /* This is a function so that we don't hold on to MAXPATHLEN
4013 bytes of stack longer than necessary
4016 S_procself_val(pTHX_ SV *sv, char *arg0)
4018 char buf[MAXPATHLEN];
4019 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
4021 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
4022 includes a spurious NUL which will cause $^X to fail in system
4023 or backticks (this will prevent extensions from being built and
4024 many tests from working). readlink is not meant to add a NUL.
4025 Normal readlink works fine.
4027 if (len > 0 && buf[len-1] == '\0') {
4031 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
4032 returning the text "unknown" from the readlink rather than the path
4033 to the executable (or returning an error from the readlink). Any valid
4034 path has a '/' in it somewhere, so use that to validate the result.
4035 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
4037 if (len > 0 && memchr(buf, '/', len)) {
4038 sv_setpvn(sv,buf,len);
4044 #endif /* HAS_PROCSELFEXE */
4047 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4053 PL_toptarget = NEWSV(0,0);
4054 sv_upgrade(PL_toptarget, SVt_PVFM);
4055 sv_setpvn(PL_toptarget, "", 0);
4056 PL_bodytarget = NEWSV(0,0);
4057 sv_upgrade(PL_bodytarget, SVt_PVFM);
4058 sv_setpvn(PL_bodytarget, "", 0);
4059 PL_formtarget = PL_bodytarget;
4063 init_argv_symbols(argc,argv);
4065 if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) {
4066 #ifdef MACOS_TRADITIONAL
4067 /* $0 is not majick on a Mac */
4068 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4070 sv_setpv(GvSV(tmpgv),PL_origfilename);
4071 magicname("0", "0", 1);
4074 if ((tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))) {/* $^X */
4075 #ifdef HAS_PROCSELFEXE
4076 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
4079 sv_setpv(GvSV(tmpgv), os2_execname(aTHX));
4081 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
4085 if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) {
4087 GvMULTI_on(PL_envgv);
4088 hv = GvHVn(PL_envgv);
4089 hv_magic(hv, Nullgv, PERL_MAGIC_env);
4091 #ifdef USE_ENVIRON_ARRAY
4092 /* Note that if the supplied env parameter is actually a copy
4093 of the global environ then it may now point to free'd memory
4094 if the environment has been modified since. To avoid this
4095 problem we treat env==NULL as meaning 'use the default'
4100 # ifdef USE_ITHREADS
4101 && PL_curinterp == aTHX
4105 environ[0] = Nullch;
4108 char** origenv = environ;
4109 for (; *env; env++) {
4110 if (!(s = strchr(*env,'=')) || s == *env)
4112 #if defined(MSDOS) && !defined(DJGPP)
4117 sv = newSVpv(s+1, 0);
4118 (void)hv_store(hv, *env, s - *env, sv, 0);
4121 if (origenv != environ) {
4122 /* realloc has shifted us */
4123 env = (env - origenv) + environ;
4128 #endif /* USE_ENVIRON_ARRAY */
4129 #endif /* !PERL_MICRO */
4132 if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
4133 SvREADONLY_off(GvSV(tmpgv));
4134 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4135 SvREADONLY_on(GvSV(tmpgv));
4137 #ifdef THREADS_HAVE_PIDS
4138 PL_ppid = (IV)getppid();
4141 /* touch @F array to prevent spurious warnings 20020415 MJD */
4143 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4145 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4146 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4147 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4151 S_init_perllib(pTHX)
4156 s = PerlEnv_getenv("PERL5LIB");
4158 incpush(s, TRUE, TRUE, TRUE);
4160 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE);
4162 /* Treat PERL5?LIB as a possible search list logical name -- the
4163 * "natural" VMS idiom for a Unix path string. We allow each
4164 * element to be a set of |-separated directories for compatibility.
4168 if (my_trnlnm("PERL5LIB",buf,0))
4169 do { incpush(buf,TRUE,TRUE,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4171 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE);
4175 /* Use the ~-expanded versions of APPLLIB (undocumented),
4176 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4179 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE);
4183 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE);
4185 #ifdef MACOS_TRADITIONAL
4188 SV * privdir = NEWSV(55, 0);
4189 char * macperl = PerlEnv_getenv("MACPERL");
4194 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4195 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4196 incpush(SvPVX(privdir), TRUE, FALSE, TRUE);
4197 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4198 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4199 incpush(SvPVX(privdir), TRUE, FALSE, TRUE);
4201 SvREFCNT_dec(privdir);
4204 incpush(":", FALSE, FALSE, TRUE);
4207 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4210 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE);
4212 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE);
4216 /* sitearch is always relative to sitelib on Windows for
4217 * DLL-based path intuition to work correctly */
4218 # if !defined(WIN32)
4219 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE);
4225 /* this picks up sitearch as well */
4226 incpush(SITELIB_EXP, TRUE, FALSE, TRUE);
4228 incpush(SITELIB_EXP, FALSE, FALSE, TRUE);
4232 #ifdef SITELIB_STEM /* Search for version-specific dirs below here */
4233 incpush(SITELIB_STEM, FALSE, TRUE, TRUE);
4236 #ifdef PERL_VENDORARCH_EXP
4237 /* vendorarch is always relative to vendorlib on Windows for
4238 * DLL-based path intuition to work correctly */
4239 # if !defined(WIN32)
4240 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE);
4244 #ifdef PERL_VENDORLIB_EXP
4246 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE); /* this picks up vendorarch as well */
4248 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE);
4252 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4253 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE);
4256 #ifdef PERL_OTHERLIBDIRS
4257 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE);
4261 incpush(".", FALSE, FALSE, TRUE);
4262 #endif /* MACOS_TRADITIONAL */
4265 #if defined(DOSISH) || defined(EPOC)
4266 # define PERLLIB_SEP ';'
4269 # define PERLLIB_SEP '|'
4271 # if defined(MACOS_TRADITIONAL)
4272 # define PERLLIB_SEP ','
4274 # define PERLLIB_SEP ':'
4278 #ifndef PERLLIB_MANGLE
4279 # define PERLLIB_MANGLE(s,n) (s)
4283 S_incpush(pTHX_ char *p, int addsubdirs, int addoldvers, int usesep)
4285 SV *subdir = Nullsv;
4290 if (addsubdirs || addoldvers) {
4291 subdir = sv_newmortal();
4294 /* Break at all separators */
4296 SV *libdir = NEWSV(55,0);
4299 /* skip any consecutive separators */
4301 while ( *p == PERLLIB_SEP ) {
4302 /* Uncomment the next line for PATH semantics */
4303 /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */
4308 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
4309 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4314 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4315 p = Nullch; /* break out */
4317 #ifdef MACOS_TRADITIONAL
4318 if (!strchr(SvPVX(libdir), ':')) {
4321 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4323 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4324 sv_catpv(libdir, ":");
4328 * BEFORE pushing libdir onto @INC we may first push version- and
4329 * archname-specific sub-directories.
4331 if (addsubdirs || addoldvers) {
4332 #ifdef PERL_INC_VERSION_LIST
4333 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4334 const char *incverlist[] = { PERL_INC_VERSION_LIST };
4335 const char **incver;
4342 if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) {
4344 while (unix[len-1] == '/') len--; /* Cosmetic */
4345 sv_usepvn(libdir,unix,len);
4348 PerlIO_printf(Perl_error_log,
4349 "Failed to unixify @INC element \"%s\"\n",
4353 #ifdef MACOS_TRADITIONAL
4354 #define PERL_AV_SUFFIX_FMT ""
4355 #define PERL_ARCH_FMT "%s:"
4356 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4358 #define PERL_AV_SUFFIX_FMT "/"
4359 #define PERL_ARCH_FMT "/%s"
4360 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4362 /* .../version/archname if -d .../version/archname */
4363 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4365 (int)PERL_REVISION, (int)PERL_VERSION,
4366 (int)PERL_SUBVERSION, ARCHNAME);
4367 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
4368 S_ISDIR(tmpstatbuf.st_mode))
4369 av_push(GvAVn(PL_incgv), newSVsv(subdir));
4371 /* .../version if -d .../version */
4372 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir,
4373 (int)PERL_REVISION, (int)PERL_VERSION,
4374 (int)PERL_SUBVERSION);
4375 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
4376 S_ISDIR(tmpstatbuf.st_mode))
4377 av_push(GvAVn(PL_incgv), newSVsv(subdir));
4379 /* .../archname if -d .../archname */
4380 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME);
4381 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
4382 S_ISDIR(tmpstatbuf.st_mode))
4383 av_push(GvAVn(PL_incgv), newSVsv(subdir));
4386 #ifdef PERL_INC_VERSION_LIST
4388 for (incver = incverlist; *incver; incver++) {
4389 /* .../xxx if -d .../xxx */
4390 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver);
4391 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
4392 S_ISDIR(tmpstatbuf.st_mode))
4393 av_push(GvAVn(PL_incgv), newSVsv(subdir));
4399 /* finally push this lib directory on the end of @INC */
4400 av_push(GvAVn(PL_incgv), libdir);
4404 #ifdef USE_5005THREADS
4405 STATIC struct perl_thread *
4406 S_init_main_thread(pTHX)
4408 #if !defined(PERL_IMPLICIT_CONTEXT)
4409 struct perl_thread *thr;
4413 Newz(53, thr, 1, struct perl_thread);
4414 PL_curcop = &PL_compiling;
4415 thr->interp = PERL_GET_INTERP;
4416 thr->cvcache = newHV();
4417 thr->threadsv = newAV();
4418 /* thr->threadsvp is set when find_threadsv is called */
4419 thr->specific = newAV();
4420 thr->flags = THRf_R_JOINABLE;
4421 MUTEX_INIT(&thr->mutex);
4422 /* Handcraft thrsv similarly to mess_sv */
4423 New(53, PL_thrsv, 1, SV);
4424 Newz(53, xpv, 1, XPV);
4425 SvFLAGS(PL_thrsv) = SVt_PV;
4426 SvANY(PL_thrsv) = (void*)xpv;
4427 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
4428 SvPVX(PL_thrsv) = (char*)thr;
4429 SvCUR_set(PL_thrsv, sizeof(thr));
4430 SvLEN_set(PL_thrsv, sizeof(thr));
4431 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
4432 thr->oursv = PL_thrsv;
4433 PL_chopset = " \n-";
4436 MUTEX_LOCK(&PL_threads_mutex);
4442 MUTEX_UNLOCK(&PL_threads_mutex);
4444 #ifdef HAVE_THREAD_INTERN
4445 Perl_init_thread_intern(thr);
4448 #ifdef SET_THREAD_SELF
4449 SET_THREAD_SELF(thr);
4451 thr->self = pthread_self();
4452 #endif /* SET_THREAD_SELF */
4456 * These must come after the thread self setting
4457 * because sv_setpvn does SvTAINT and the taint
4458 * fields thread selfness being set.
4460 PL_toptarget = NEWSV(0,0);
4461 sv_upgrade(PL_toptarget, SVt_PVFM);
4462 sv_setpvn(PL_toptarget, "", 0);
4463 PL_bodytarget = NEWSV(0,0);
4464 sv_upgrade(PL_bodytarget, SVt_PVFM);
4465 sv_setpvn(PL_bodytarget, "", 0);
4466 PL_formtarget = PL_bodytarget;
4467 thr->errsv = newSVpvn("", 0);
4468 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
4471 PL_peepp = MEMBER_TO_FPTR(Perl_peep);
4472 PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
4473 PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
4474 PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
4475 PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
4476 PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
4478 PL_reginterp_cnt = 0;
4482 #endif /* USE_5005THREADS */
4485 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4488 line_t oldline = CopLINE(PL_curcop);
4494 while (AvFILL(paramList) >= 0) {
4495 cv = (CV*)av_shift(paramList);
4497 if (paramList == PL_beginav) {
4498 /* save PL_beginav for compiler */
4499 if (! PL_beginav_save)
4500 PL_beginav_save = newAV();
4501 av_push(PL_beginav_save, (SV*)cv);
4503 else if (paramList == PL_checkav) {
4504 /* save PL_checkav for compiler */
4505 if (! PL_checkav_save)
4506 PL_checkav_save = newAV();
4507 av_push(PL_checkav_save, (SV*)cv);
4512 #ifdef PERL_FLEXIBLE_EXCEPTIONS
4513 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_vcall_list_body), cv);
4519 #ifndef PERL_FLEXIBLE_EXCEPTIONS
4523 (void)SvPV(atsv, len);
4525 PL_curcop = &PL_compiling;
4526 CopLINE_set(PL_curcop, oldline);
4527 if (paramList == PL_beginav)
4528 sv_catpv(atsv, "BEGIN failed--compilation aborted");
4530 Perl_sv_catpvf(aTHX_ atsv,
4531 "%s failed--call queue aborted",
4532 paramList == PL_checkav ? "CHECK"
4533 : paramList == PL_initav ? "INIT"
4535 while (PL_scopestack_ix > oldscope)
4538 Perl_croak(aTHX_ "%"SVf"", atsv);
4545 /* my_exit() was called */
4546 while (PL_scopestack_ix > oldscope)
4549 PL_curstash = PL_defstash;
4550 PL_curcop = &PL_compiling;
4551 CopLINE_set(PL_curcop, oldline);
4553 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4554 if (paramList == PL_beginav)
4555 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4557 Perl_croak(aTHX_ "%s failed--call queue aborted",
4558 paramList == PL_checkav ? "CHECK"
4559 : paramList == PL_initav ? "INIT"
4566 PL_curcop = &PL_compiling;
4567 CopLINE_set(PL_curcop, oldline);
4570 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4578 #ifdef PERL_FLEXIBLE_EXCEPTIONS
4580 S_vcall_list_body(pTHX_ va_list args)
4582 CV *cv = va_arg(args, CV*);
4583 return call_list_body(cv);
4588 S_call_list_body(pTHX_ CV *cv)
4590 PUSHMARK(PL_stack_sp);
4591 call_sv((SV*)cv, G_EVAL|G_DISCARD);
4596 Perl_my_exit(pTHX_ U32 status)
4598 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
4599 thr, (unsigned long) status));
4608 STATUS_NATIVE_SET(status);
4615 Perl_my_failure_exit(pTHX)
4618 if (vaxc$errno & 1) {
4619 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
4620 STATUS_NATIVE_SET(44);
4623 if (!vaxc$errno) /* unlikely */
4624 STATUS_NATIVE_SET(44);
4626 STATUS_NATIVE_SET(vaxc$errno);
4631 STATUS_POSIX_SET(errno);
4633 exitstatus = STATUS_POSIX >> 8;
4634 if (exitstatus & 255)
4635 STATUS_POSIX_SET(exitstatus);
4637 STATUS_POSIX_SET(255);
4644 S_my_exit_jump(pTHX)
4646 register PERL_CONTEXT *cx;
4651 SvREFCNT_dec(PL_e_script);
4652 PL_e_script = Nullsv;
4655 POPSTACK_TO(PL_mainstack);
4656 if (cxstack_ix >= 0) {
4659 POPBLOCK(cx,PL_curpm);
4667 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4670 p = SvPVX(PL_e_script);
4671 nl = strchr(p, '\n');
4672 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4674 filter_del(read_e_script);
4677 sv_catpvn(buf_sv, p, nl-p);
4678 sv_chop(PL_e_script, nl);