3 * Copyright (c) 1987-1998 Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
16 #include "patchlevel.h"
18 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
23 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
24 char *getenv _((char *)); /* Usually in <stdlib.h> */
34 dEXTCONST char rcsid[] = "perl.c\nPatch level: ###\n";
42 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
49 static I32 read_e_script _((CPerlObj* pPerl, int idx, SV *buf_sv, int maxlen));
51 static void find_beginning _((void));
52 static void forbid_setid _((char *));
53 static void incpush _((char *, int));
54 static void init_interp _((void));
55 static void init_ids _((void));
56 static void init_debugger _((void));
57 static void init_lexer _((void));
58 static void init_main_stash _((void));
60 static struct perl_thread * init_main_thread _((void));
61 #endif /* USE_THREADS */
62 static void init_perllib _((void));
63 static void init_postdump_symbols _((int, char **, char **));
64 static void init_predump_symbols _((void));
65 static void my_exit_jump _((void)) __attribute__((noreturn));
66 static void nuke_stacks _((void));
67 static void open_script _((char *, bool, SV *, int *fd));
68 static void usage _((char *));
69 static void validate_suid _((char *, char*, int));
70 static I32 read_e_script _((int idx, SV *buf_sv, int maxlen));
74 CPerlObj* perl_alloc(IPerlMem* ipM, IPerlEnv* ipE, IPerlStdIO* ipStd,
75 IPerlLIO* ipLIO, IPerlDir* ipD, IPerlSock* ipS, IPerlProc* ipP)
77 CPerlObj* pPerl = new(ipM) CPerlObj(ipM, ipE, ipStd, ipLIO, ipD, ipS, ipP);
87 PerlInterpreter *sv_interp;
90 New(53, sv_interp, 1, PerlInterpreter);
93 #endif /* PERL_OBJECT */
97 CPerlObj::perl_construct(void)
99 perl_construct(register PerlInterpreter *sv_interp)
105 struct perl_thread *thr;
106 #endif /* FAKE_THREADS */
107 #endif /* USE_THREADS */
110 if (!(PL_curinterp = sv_interp))
116 Zero(sv_interp, 1, PerlInterpreter);
119 /* Init the real globals (and main thread)? */
124 #ifdef ALLOC_THREAD_KEY
127 if (pthread_key_create(&PL_thr_key, 0))
128 croak("panic: pthread_key_create");
130 MUTEX_INIT(&PL_sv_mutex);
132 * Safe to use basic SV functions from now on (though
133 * not things like mortals or tainting yet).
135 MUTEX_INIT(&PL_eval_mutex);
136 COND_INIT(&PL_eval_cond);
137 MUTEX_INIT(&PL_threads_mutex);
138 COND_INIT(&PL_nthreads_cond);
139 #ifdef EMULATE_ATOMIC_REFCOUNTS
140 MUTEX_INIT(&PL_svref_mutex);
141 #endif /* EMULATE_ATOMIC_REFCOUNTS */
143 thr = init_main_thread();
144 #endif /* USE_THREADS */
146 PL_linestr = NEWSV(65,79);
147 sv_upgrade(PL_linestr,SVt_PVIV);
149 if (!SvREADONLY(&PL_sv_undef)) {
150 /* set read-only and try to insure than we wont see REFCNT==0
153 SvREADONLY_on(&PL_sv_undef);
154 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
156 sv_setpv(&PL_sv_no,PL_No);
158 SvREADONLY_on(&PL_sv_no);
159 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
161 sv_setpv(&PL_sv_yes,PL_Yes);
163 SvREADONLY_on(&PL_sv_yes);
164 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
169 /* PL_sighandlerp = sighandler; */
171 PL_sighandlerp = sighandler;
173 PL_pidstatus = newHV();
177 * There is no way we can refer to them from Perl so close them to save
178 * space. The other alternative would be to provide STDAUX and STDPRN
181 (void)fclose(stdaux);
182 (void)fclose(stdprn);
186 PL_nrs = newSVpv("\n", 1);
187 PL_rs = SvREFCNT_inc(PL_nrs);
192 PL_perl_destruct_level = 1;
194 if (PL_perl_destruct_level > 0)
199 PL_lex_state = LEX_NOTPARSING;
201 PL_start_env.je_prev = NULL;
202 PL_start_env.je_ret = -1;
203 PL_start_env.je_mustcatch = TRUE;
204 PL_top_env = &PL_start_env;
207 SET_NUMERIC_STANDARD();
208 #if defined(SUBVERSION) && SUBVERSION > 0
209 sprintf(PL_patchlevel, "%7.5f", (double) 5
210 + ((double) PATCHLEVEL / (double) 1000)
211 + ((double) SUBVERSION / (double) 100000));
213 sprintf(PL_patchlevel, "%5.3f", (double) 5 +
214 ((double) PATCHLEVEL / (double) 1000));
217 #if defined(LOCAL_PATCH_COUNT)
218 PL_localpatches = local_patches; /* For possible -v */
221 PerlIO_init(); /* Hook to IO system */
223 PL_fdpid = newAV(); /* for remembering popen pids by fd */
224 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
227 New(51,PL_debname,128,char);
228 New(52,PL_debdelim,128,char);
236 CPerlObj::perl_destruct(void)
238 perl_destruct(register PerlInterpreter *sv_interp)
242 int destruct_level; /* 0=none, 1=full, 2=full with checks */
247 #endif /* USE_THREADS */
250 if (!(PL_curinterp = sv_interp))
256 /* Pass 1 on any remaining threads: detach joinables, join zombies */
258 MUTEX_LOCK(&PL_threads_mutex);
259 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
260 "perl_destruct: waiting for %d threads...\n",
262 for (t = thr->next; t != thr; t = t->next) {
263 MUTEX_LOCK(&t->mutex);
264 switch (ThrSTATE(t)) {
267 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
268 "perl_destruct: joining zombie %p\n", t));
269 ThrSETSTATE(t, THRf_DEAD);
270 MUTEX_UNLOCK(&t->mutex);
273 * The SvREFCNT_dec below may take a long time (e.g. av
274 * may contain an object scalar whose destructor gets
275 * called) so we have to unlock threads_mutex and start
278 MUTEX_UNLOCK(&PL_threads_mutex);
280 SvREFCNT_dec((SV*)av);
281 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
282 "perl_destruct: joined zombie %p OK\n", t));
284 case THRf_R_JOINABLE:
285 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
286 "perl_destruct: detaching thread %p\n", t));
287 ThrSETSTATE(t, THRf_R_DETACHED);
289 * We unlock threads_mutex and t->mutex in the opposite order
290 * from which we locked them just so that DETACH won't
291 * deadlock if it panics. It's only a breach of good style
292 * not a bug since they are unlocks not locks.
294 MUTEX_UNLOCK(&PL_threads_mutex);
296 MUTEX_UNLOCK(&t->mutex);
299 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
300 "perl_destruct: ignoring %p (state %u)\n",
302 MUTEX_UNLOCK(&t->mutex);
303 /* fall through and out */
306 /* We leave the above "Pass 1" loop with threads_mutex still locked */
308 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
309 while (PL_nthreads > 1)
311 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
312 "perl_destruct: final wait for %d threads\n",
314 COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex);
316 /* At this point, we're the last thread */
317 MUTEX_UNLOCK(&PL_threads_mutex);
318 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
319 MUTEX_DESTROY(&PL_threads_mutex);
320 COND_DESTROY(&PL_nthreads_cond);
321 #endif /* !defined(FAKE_THREADS) */
322 #endif /* USE_THREADS */
324 destruct_level = PL_perl_destruct_level;
328 if (s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL")) {
330 if (destruct_level < i)
343 /* We must account for everything. */
345 /* Destroy the main CV and syntax tree */
347 PL_curpad = AvARRAY(PL_comppad);
348 op_free(PL_main_root);
349 PL_main_root = Nullop;
351 PL_curcop = &PL_compiling;
352 PL_main_start = Nullop;
353 SvREFCNT_dec(PL_main_cv);
356 if (PL_sv_objcount) {
358 * Try to destruct global references. We do this first so that the
359 * destructors and destructees still exist. Some sv's might remain.
360 * Non-referenced objects are on their own.
367 /* unhook hooks which will soon be, or use, destroyed data */
368 SvREFCNT_dec(PL_warnhook);
369 PL_warnhook = Nullsv;
370 SvREFCNT_dec(PL_diehook);
372 SvREFCNT_dec(PL_parsehook);
373 PL_parsehook = Nullsv;
375 /* call exit list functions */
376 while (PL_exitlistlen-- > 0)
377 PL_exitlist[PL_exitlistlen].fn(PERL_OBJECT_THIS_ PL_exitlist[PL_exitlistlen].ptr);
379 Safefree(PL_exitlist);
381 if (destruct_level == 0){
383 DEBUG_P(debprofdump());
385 /* The exit() function will do everything that needs doing. */
389 /* loosen bonds of global variables */
392 (void)PerlIO_close(PL_rsfp);
396 /* Filters for program text */
397 SvREFCNT_dec(PL_rsfp_filters);
398 PL_rsfp_filters = Nullav;
401 PL_preprocess = FALSE;
407 PL_doswitches = FALSE;
409 PL_doextract = FALSE;
410 PL_sawampersand = FALSE; /* must save all match strings */
411 PL_sawstudy = FALSE; /* do fbm_instr on all strings */
415 Safefree(PL_inplace);
419 SvREFCNT_dec(PL_e_script);
420 PL_e_script = Nullsv;
423 /* magical thingies */
425 Safefree(PL_ofs); /* $, */
428 Safefree(PL_ors); /* $\ */
431 SvREFCNT_dec(PL_rs); /* $/ */
434 SvREFCNT_dec(PL_nrs); /* $/ helper */
437 PL_multiline = 0; /* $* */
439 SvREFCNT_dec(PL_statname);
440 PL_statname = Nullsv;
443 /* defgv, aka *_ should be taken care of elsewhere */
445 /* clean up after study() */
446 SvREFCNT_dec(PL_lastscream);
447 PL_lastscream = Nullsv;
448 Safefree(PL_screamfirst);
450 Safefree(PL_screamnext);
453 /* startup and shutdown function lists */
454 SvREFCNT_dec(PL_beginav);
455 SvREFCNT_dec(PL_endav);
456 SvREFCNT_dec(PL_initav);
461 /* shortcuts just get cleared */
468 PL_argvoutgv = Nullgv;
470 PL_last_in_gv = Nullgv;
473 /* reset so print() ends up where we expect */
476 /* Prepare to destruct main symbol table. */
483 if (destruct_level >= 2) {
484 if (PL_scopestack_ix != 0)
485 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
486 (long)PL_scopestack_ix);
487 if (PL_savestack_ix != 0)
488 warn("Unbalanced saves: %ld more saves than restores\n",
489 (long)PL_savestack_ix);
490 if (PL_tmps_floor != -1)
491 warn("Unbalanced tmps: %ld more allocs than frees\n",
492 (long)PL_tmps_floor + 1);
493 if (cxstack_ix != -1)
494 warn("Unbalanced context: %ld more PUSHes than POPs\n",
495 (long)cxstack_ix + 1);
498 /* Now absolutely destruct everything, somehow or other, loops or no. */
500 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
501 while (PL_sv_count != 0 && PL_sv_count != last_sv_count) {
502 last_sv_count = PL_sv_count;
505 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
506 SvFLAGS(PL_strtab) |= SVt_PVHV;
508 /* Destruct the global string table. */
510 /* Yell and reset the HeVAL() slots that are still holding refcounts,
511 * so that sv_free() won't fail on them.
519 max = HvMAX(PL_strtab);
520 array = HvARRAY(PL_strtab);
524 warn("Unbalanced string table refcount: (%d) for \"%s\"",
525 HeVAL(hent) - Nullsv, HeKEY(hent));
526 HeVAL(hent) = Nullsv;
536 SvREFCNT_dec(PL_strtab);
538 if (PL_sv_count != 0)
539 warn("Scalars leaked: %ld\n", (long)PL_sv_count);
543 /* No SVs have survived, need to clean out */
545 PL_pidstatus = Nullhv;
546 Safefree(PL_origfilename);
547 Safefree(PL_archpat_auto);
548 Safefree(PL_reg_start_tmp);
549 Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh));
550 Safefree(PL_op_mask);
552 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
554 DEBUG_P(debprofdump());
556 MUTEX_DESTROY(&PL_sv_mutex);
557 MUTEX_DESTROY(&PL_eval_mutex);
558 COND_DESTROY(&PL_eval_cond);
560 /* As the penultimate thing, free the non-arena SV for thrsv */
561 Safefree(SvPVX(PL_thrsv));
562 Safefree(SvANY(PL_thrsv));
565 #endif /* USE_THREADS */
567 /* As the absolutely last thing, free the non-arena SV for mess() */
570 /* it could have accumulated taint magic */
571 if (SvTYPE(PL_mess_sv) >= SVt_PVMG) {
574 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
575 moremagic = mg->mg_moremagic;
576 if (mg->mg_ptr && mg->mg_type != 'g' && mg->mg_len >= 0)
577 Safefree(mg->mg_ptr);
581 /* we know that type >= SVt_PV */
582 SvOOK_off(PL_mess_sv);
583 Safefree(SvPVX(PL_mess_sv));
584 Safefree(SvANY(PL_mess_sv));
585 Safefree(PL_mess_sv);
592 CPerlObj::perl_free(void)
594 perl_free(PerlInterpreter *sv_interp)
600 if (!(PL_curinterp = sv_interp))
608 CPerlObj::perl_atexit(void (*fn) (CPerlObj*,void *), void *ptr)
610 perl_atexit(void (*fn) (void *), void *ptr)
613 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
614 PL_exitlist[PL_exitlistlen].fn = fn;
615 PL_exitlist[PL_exitlistlen].ptr = ptr;
621 CPerlObj::perl_parse(void (*xsinit) (CPerlObj*), int argc, char **argv, char **env)
623 perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char **argv, char **env)
629 char *scriptname = NULL;
630 VOL bool dosearch = FALSE;
638 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
641 croak("suidperl is no longer needed since the kernel can now execute\n\
642 setuid perl scripts securely.\n");
647 if (!(PL_curinterp = sv_interp))
651 #if defined(NeXT) && defined(__DYNAMIC__)
652 _dyld_lookup_and_bind
653 ("__environ", (unsigned long *) &environ_pointer, NULL);
658 #ifndef VMS /* VMS doesn't have environ array */
659 PL_origenviron = environ;
664 /* Come here if running an undumped a.out. */
666 PL_origfilename = savepv(argv[0]);
667 PL_do_undump = FALSE;
668 cxstack_ix = -1; /* start label stack again */
670 init_postdump_symbols(argc,argv,env);
675 PL_curpad = AvARRAY(PL_comppad);
676 op_free(PL_main_root);
677 PL_main_root = Nullop;
679 PL_main_start = Nullop;
680 SvREFCNT_dec(PL_main_cv);
684 oldscope = PL_scopestack_ix;
692 /* my_exit() was called */
693 while (PL_scopestack_ix > oldscope)
696 PL_curstash = PL_defstash;
698 call_list(oldscope, PL_endav);
700 return STATUS_NATIVE_EXPORT;
703 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
707 sv_setpvn(PL_linestr,"",0);
708 sv = newSVpv("",0); /* first used for -I flags */
712 for (argc--,argv++; argc > 0; argc--,argv++) {
713 if (argv[0][0] != '-' || !argv[0][1])
717 validarg = " PHOOEY ";
743 if (s = moreswitches(s))
753 if (PL_euid != PL_uid || PL_egid != PL_gid)
754 croak("No -e allowed in setuid scripts");
756 PL_e_script = newSVpv("",0);
757 filter_add(read_e_script, NULL);
760 sv_catpv(PL_e_script, s);
762 sv_catpv(PL_e_script, argv[1]);
766 croak("No code specified for -e");
767 sv_catpv(PL_e_script, "\n");
770 case 'I': /* -I handled both here and in moreswitches() */
772 if (!*++s && (s=argv[1]) != Nullch) {
775 while (s && isSPACE(*s))
779 for (e = s; *e && !isSPACE(*e); e++) ;
786 } /* XXX else croak? */
790 PL_preprocess = TRUE;
800 PL_preambleav = newAV();
801 av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
803 PL_Sv = newSVpv("print myconfig();",0);
805 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
807 sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
809 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
810 sv_catpv(PL_Sv,"\" Compile-time options:");
812 sv_catpv(PL_Sv," DEBUGGING");
815 sv_catpv(PL_Sv," NO_EMBED");
818 sv_catpv(PL_Sv," MULTIPLICITY");
820 sv_catpv(PL_Sv,"\\n\",");
822 #if defined(LOCAL_PATCH_COUNT)
823 if (LOCAL_PATCH_COUNT > 0) {
825 sv_catpv(PL_Sv,"\" Locally applied patches:\\n\",");
826 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
827 if (PL_localpatches[i])
828 sv_catpvf(PL_Sv,"\" \\t%s\\n\",",PL_localpatches[i]);
832 sv_catpvf(PL_Sv,"\" Built under %s\\n\"",OSNAME);
835 sv_catpvf(PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
837 sv_catpvf(PL_Sv,",\" Compiled on %s\\n\"",__DATE__);
842 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
843 print \" \\%ENV:\\n @env\\n\" if @env; \
844 print \" \\@INC:\\n @INC\\n\";");
847 PL_Sv = newSVpv("config_vars(qw(",0);
848 sv_catpv(PL_Sv, ++s);
849 sv_catpv(PL_Sv, "))");
852 av_push(PL_preambleav, PL_Sv);
853 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
859 PL_cddir = savepv(s);
864 if (!*++s || isSPACE(*s)) {
868 /* catch use of gnu style long options */
869 if (strEQ(s, "version")) {
873 if (strEQ(s, "help")) {
880 croak("Unrecognized switch: -%s (-h will show valid options)",s);
885 if (!PL_tainting && (s = PerlEnv_getenv("PERL5OPT"))) {
896 if (!strchr("DIMUdmw", *s))
897 croak("Illegal switch in PERL5OPT: -%c", *s);
903 scriptname = argv[0];
906 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
908 else if (scriptname == Nullch) {
910 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
918 open_script(scriptname,dosearch,sv,&fdscript);
920 validate_suid(validarg, scriptname,fdscript);
925 PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0);
926 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
927 CvUNIQUE_on(PL_compcv);
929 PL_comppad = newAV();
930 av_push(PL_comppad, Nullsv);
931 PL_curpad = AvARRAY(PL_comppad);
932 PL_comppad_name = newAV();
933 PL_comppad_name_fill = 0;
934 PL_min_intro_pending = 0;
937 av_store(PL_comppad_name, 0, newSVpv("@_", 2));
938 PL_curpad[0] = (SV*)newAV();
939 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
940 CvOWNER(PL_compcv) = 0;
941 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
942 MUTEX_INIT(CvMUTEXP(PL_compcv));
943 #endif /* USE_THREADS */
945 comppadlist = newAV();
946 AvREAL_off(comppadlist);
947 av_store(comppadlist, 0, (SV*)PL_comppad_name);
948 av_store(comppadlist, 1, (SV*)PL_comppad);
949 CvPADLIST(PL_compcv) = comppadlist;
951 boot_core_UNIVERSAL();
954 (*xsinit)(PERL_OBJECT_THIS); /* in case linked C routines want magical variables */
955 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
959 init_predump_symbols();
960 /* init_postdump_symbols not currently designed to be called */
961 /* more than once (ENV isn't cleared first, for example) */
962 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
964 init_postdump_symbols(argc,argv,env);
968 /* now parse the script */
970 SETERRNO(0,SS$_NORMAL);
972 if (yyparse() || PL_error_count) {
974 croak("%s had compilation errors.\n", PL_origfilename);
976 croak("Execution of %s aborted due to compilation errors.\n",
980 PL_curcop->cop_line = 0;
981 PL_curstash = PL_defstash;
982 PL_preprocess = FALSE;
984 SvREFCNT_dec(PL_e_script);
985 PL_e_script = Nullsv;
988 /* now that script is parsed, we can modify record separator */
990 PL_rs = SvREFCNT_inc(PL_nrs);
991 sv_setsv(perl_get_sv("/", TRUE), PL_rs);
996 gv_check(PL_defstash);
1002 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1003 dump_mstats("after compilation:");
1014 CPerlObj::perl_run(void)
1016 perl_run(PerlInterpreter *sv_interp)
1025 if (!(PL_curinterp = sv_interp))
1029 oldscope = PL_scopestack_ix;
1034 cxstack_ix = -1; /* start context stack again */
1037 /* my_exit() was called */
1038 while (PL_scopestack_ix > oldscope)
1041 PL_curstash = PL_defstash;
1043 call_list(oldscope, PL_endav);
1045 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1046 dump_mstats("after execution: ");
1049 return STATUS_NATIVE_EXPORT;
1051 if (!PL_restartop) {
1052 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1057 POPSTACK_TO(PL_mainstack);
1061 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1062 PL_sawampersand ? "Enabling" : "Omitting"));
1064 if (!PL_restartop) {
1065 DEBUG_x(dump_all());
1066 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1068 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1069 (unsigned long) thr));
1070 #endif /* USE_THREADS */
1073 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", PL_origfilename);
1076 if (PERLDB_SINGLE && PL_DBsingle)
1077 sv_setiv(PL_DBsingle, 1);
1079 call_list(oldscope, PL_initav);
1085 PL_op = PL_restartop;
1089 else if (PL_main_start) {
1090 CvDEPTH(PL_main_cv) = 1;
1091 PL_op = PL_main_start;
1101 perl_get_sv(char *name, I32 create)
1105 if (name[1] == '\0' && !isALPHA(name[0])) {
1106 PADOFFSET tmp = find_threadsv(name);
1107 if (tmp != NOT_IN_PAD) {
1109 return THREADSV(tmp);
1112 #endif /* USE_THREADS */
1113 gv = gv_fetchpv(name, create, SVt_PV);
1120 perl_get_av(char *name, I32 create)
1122 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1131 perl_get_hv(char *name, I32 create)
1133 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1142 perl_get_cv(char *name, I32 create)
1144 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1145 if (create && !GvCVu(gv))
1146 return newSUB(start_subparse(FALSE, 0),
1147 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1155 /* Be sure to refetch the stack pointer after calling these routines. */
1158 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1160 /* See G_* flags in cop.h */
1161 /* null terminated arg list */
1168 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1173 return perl_call_pv(sub_name, flags);
1177 perl_call_pv(char *sub_name, I32 flags)
1178 /* name of the subroutine */
1179 /* See G_* flags in cop.h */
1181 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1185 perl_call_method(char *methname, I32 flags)
1186 /* name of the subroutine */
1187 /* See G_* flags in cop.h */
1193 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1198 return perl_call_sv(*PL_stack_sp--, flags);
1201 /* May be called with any of a CV, a GV, or an SV containing the name. */
1203 perl_call_sv(SV *sv, I32 flags)
1205 /* See G_* flags in cop.h */
1208 LOGOP myop; /* fake syntax tree node */
1212 bool oldcatch = CATCH_GET;
1217 if (flags & G_DISCARD) {
1222 Zero(&myop, 1, LOGOP);
1223 myop.op_next = Nullop;
1224 if (!(flags & G_NOARGS))
1225 myop.op_flags |= OPf_STACKED;
1226 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1227 (flags & G_ARRAY) ? OPf_WANT_LIST :
1232 EXTEND(PL_stack_sp, 1);
1233 *++PL_stack_sp = sv;
1235 oldscope = PL_scopestack_ix;
1237 if (PERLDB_SUB && PL_curstash != PL_debstash
1238 /* Handle first BEGIN of -d. */
1239 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
1240 /* Try harder, since this may have been a sighandler, thus
1241 * curstash may be meaningless. */
1242 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
1243 && !(flags & G_NODEBUG))
1244 PL_op->op_private |= OPpENTERSUB_DB;
1246 if (flags & G_EVAL) {
1247 cLOGOP->op_other = PL_op;
1249 /* we're trying to emulate pp_entertry() here */
1251 register PERL_CONTEXT *cx;
1252 I32 gimme = GIMME_V;
1257 push_return(PL_op->op_next);
1258 PUSHBLOCK(cx, CXt_EVAL, PL_stack_sp);
1260 PL_eval_root = PL_op; /* Only needed so that goto works right. */
1263 if (flags & G_KEEPERR)
1278 /* my_exit() was called */
1279 PL_curstash = PL_defstash;
1283 croak("Callback called exit");
1288 PL_op = PL_restartop;
1292 PL_stack_sp = PL_stack_base + oldmark;
1293 if (flags & G_ARRAY)
1297 *++PL_stack_sp = &PL_sv_undef;
1305 if (PL_op == (OP*)&myop)
1306 PL_op = pp_entersub(ARGS);
1309 retval = PL_stack_sp - (PL_stack_base + oldmark);
1310 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1314 if (flags & G_EVAL) {
1315 if (PL_scopestack_ix > oldscope) {
1319 register PERL_CONTEXT *cx;
1331 CATCH_SET(oldcatch);
1333 if (flags & G_DISCARD) {
1334 PL_stack_sp = PL_stack_base + oldmark;
1343 /* Eval a string. The G_EVAL flag is always assumed. */
1346 perl_eval_sv(SV *sv, I32 flags)
1348 /* See G_* flags in cop.h */
1351 UNOP myop; /* fake syntax tree node */
1352 I32 oldmark = SP - PL_stack_base;
1359 if (flags & G_DISCARD) {
1366 Zero(PL_op, 1, UNOP);
1367 EXTEND(PL_stack_sp, 1);
1368 *++PL_stack_sp = sv;
1369 oldscope = PL_scopestack_ix;
1371 if (!(flags & G_NOARGS))
1372 myop.op_flags = OPf_STACKED;
1373 myop.op_next = Nullop;
1374 myop.op_type = OP_ENTEREVAL;
1375 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1376 (flags & G_ARRAY) ? OPf_WANT_LIST :
1378 if (flags & G_KEEPERR)
1379 myop.op_flags |= OPf_SPECIAL;
1389 /* my_exit() was called */
1390 PL_curstash = PL_defstash;
1394 croak("Callback called exit");
1399 PL_op = PL_restartop;
1403 PL_stack_sp = PL_stack_base + oldmark;
1404 if (flags & G_ARRAY)
1408 *++PL_stack_sp = &PL_sv_undef;
1413 if (PL_op == (OP*)&myop)
1414 PL_op = pp_entereval(ARGS);
1417 retval = PL_stack_sp - (PL_stack_base + oldmark);
1418 if (!(flags & G_KEEPERR))
1423 if (flags & G_DISCARD) {
1424 PL_stack_sp = PL_stack_base + oldmark;
1434 perl_eval_pv(char *p, I32 croak_on_error)
1437 SV* sv = newSVpv(p, 0);
1440 perl_eval_sv(sv, G_SCALAR);
1447 if (croak_on_error && SvTRUE(ERRSV))
1448 croak(SvPVx(ERRSV, PL_na));
1453 /* Require a module. */
1456 perl_require_pv(char *pv)
1460 PUSHSTACKi(PERLSI_REQUIRE);
1462 sv = sv_newmortal();
1463 sv_setpv(sv, "require '");
1466 perl_eval_sv(sv, G_DISCARD);
1472 magicname(char *sym, char *name, I32 namlen)
1476 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1477 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1481 usage(char *name) /* XXX move this out into a module ? */
1484 /* This message really ought to be max 23 lines.
1485 * Removed -h because the user already knows that opton. Others? */
1487 static char *usage_msg[] = {
1488 "-0[octal] specify record separator (\\0, if no argument)",
1489 "-a autosplit mode with -n or -p (splits $_ into @F)",
1490 "-c check syntax only (runs BEGIN and END blocks)",
1491 "-d[:debugger] run scripts under debugger",
1492 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1493 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1494 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1495 "-i[extension] edit <> files in place (make backup if extension supplied)",
1496 "-Idirectory specify @INC/#include directory (may be used more than once)",
1497 "-l[octal] enable line ending processing, specifies line terminator",
1498 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1499 "-n assume 'while (<>) { ... }' loop around your script",
1500 "-p assume loop like -n but print line also like sed",
1501 "-P run script through C preprocessor before compilation",
1502 "-s enable some switch parsing for switches after script name",
1503 "-S look for the script using PATH environment variable",
1504 "-T turn on tainting checks",
1505 "-u dump core after parsing script",
1506 "-U allow unsafe operations",
1507 "-v print version number, patchlevel plus VERY IMPORTANT perl info",
1508 "-V[:variable] print perl configuration information",
1509 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1510 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1514 char **p = usage_msg;
1516 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1518 printf("\n %s", *p++);
1521 /* This routine handles any switches that can be given during run */
1524 moreswitches(char *s)
1533 rschar = scan_oct(s, 4, &numlen);
1534 SvREFCNT_dec(PL_nrs);
1535 if (rschar & ~((U8)~0))
1536 PL_nrs = &PL_sv_undef;
1537 else if (!rschar && numlen >= 2)
1538 PL_nrs = newSVpv("", 0);
1541 PL_nrs = newSVpv(&ch, 1);
1547 PL_splitstr = savepv(s + 1);
1561 if (*s == ':' || *s == '=') {
1562 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1566 PL_perldb = PERLDB_ALL;
1573 if (isALPHA(s[1])) {
1574 static char debopts[] = "psltocPmfrxuLHXD";
1577 for (s++; *s && (d = strchr(debopts,*s)); s++)
1578 PL_debug |= 1 << (d - debopts);
1581 PL_debug = atoi(s+1);
1582 for (s++; isDIGIT(*s); s++) ;
1584 PL_debug |= 0x80000000;
1586 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1587 for (s++; isALNUM(*s); s++) ;
1592 usage(PL_origargv[0]);
1596 Safefree(PL_inplace);
1597 PL_inplace = savepv(s+1);
1599 for (s = PL_inplace; *s && !isSPACE(*s); s++) ;
1602 if (*s == '-') /* Additional switches on #! line. */
1606 case 'I': /* -I handled both here and in parse_perl() */
1609 while (*s && isSPACE(*s))
1613 for (e = s; *e && !isSPACE(*e); e++) ;
1614 p = savepvn(s, e-s);
1620 croak("No space allowed after -I");
1628 PL_ors = savepv("\n");
1630 *PL_ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1635 if (RsPARA(PL_nrs)) {
1640 PL_ors = SvPV(PL_nrs, PL_orslen);
1641 PL_ors = savepvn(PL_ors, PL_orslen);
1645 forbid_setid("-M"); /* XXX ? */
1648 forbid_setid("-m"); /* XXX ? */
1653 /* -M-foo == 'no foo' */
1654 if (*s == '-') { use = "no "; ++s; }
1655 sv = newSVpv(use,0);
1657 /* We allow -M'Module qw(Foo Bar)' */
1658 while(isALNUM(*s) || *s==':') ++s;
1660 sv_catpv(sv, start);
1661 if (*(start-1) == 'm') {
1663 croak("Can't use '%c' after -mname", *s);
1664 sv_catpv( sv, " ()");
1667 sv_catpvn(sv, start, s-start);
1668 sv_catpv(sv, " split(/,/,q{");
1673 if (PL_preambleav == NULL)
1674 PL_preambleav = newAV();
1675 av_push(PL_preambleav, sv);
1678 croak("No space allowed after -%c", *(s-1));
1690 PL_doswitches = TRUE;
1695 croak("Too late for \"-T\" option");
1699 PL_do_undump = TRUE;
1707 #if defined(SUBVERSION) && SUBVERSION > 0
1708 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1709 PATCHLEVEL, SUBVERSION, ARCHNAME);
1711 printf("\nThis is perl, version %s built for %s",
1712 PL_patchlevel, ARCHNAME);
1714 #if defined(LOCAL_PATCH_COUNT)
1715 if (LOCAL_PATCH_COUNT > 0)
1716 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1717 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1720 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1722 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1725 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1726 printf("djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1998\n");
1729 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1730 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1733 printf("atariST series port, ++jrb bammi@cadence.com\n");
1736 printf("BeOS port Copyright Tom Spindler, 1997-1998\n");
1739 printf("MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-1998\n");
1741 #ifdef BINARY_BUILD_NOTICE
1742 BINARY_BUILD_NOTICE;
1745 Perl may be copied only under the terms of either the Artistic License or the\n\
1746 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\
1747 Complete documentation for Perl, including FAQ lists, should be found on\n\
1748 this system using `man perl' or `perldoc perl'. If you have access to the\n\
1749 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
1757 if (s[1] == '-') /* Additional switches on #! line. */
1768 #ifdef ALTERNATE_SHEBANG
1769 case 'S': /* OS/2 needs -S on "extproc" line. */
1777 croak("Can't emulate -%.1s on #! line",s);
1782 /* compliments of Tom Christiansen */
1784 /* unexec() can be found in the Gnu emacs distribution */
1785 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
1796 prog = newSVpv(BIN_EXP, 0);
1797 sv_catpv(prog, "/perl");
1798 file = newSVpv(PL_origfilename, 0);
1799 sv_catpv(file, ".perldump");
1801 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1802 /* unexec prints msg to stderr in case of failure */
1803 PerlProc_exit(status);
1806 # include <lib$routines.h>
1807 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1809 ABORT(); /* for use with undump */
1814 /* initialize curinterp */
1819 #ifdef PERL_OBJECT /* XXX kludge */
1822 PL_chopset = " \n-"; \
1823 PL_copline = NOLINE; \
1824 PL_curcop = &PL_compiling;\
1825 PL_curcopdb = NULL; \
1828 PL_laststatval = -1; \
1829 PL_laststype = OP_STAT; \
1830 PL_maxscream = -1; \
1831 PL_maxsysfd = MAXSYSFD; \
1832 PL_statname = Nullsv; \
1833 PL_tmps_floor = -1; \
1835 PL_op_mask = NULL; \
1837 PL_laststatval = -1; \
1838 PL_laststype = OP_STAT; \
1839 PL_mess_sv = Nullsv; \
1840 PL_splitstr = " "; \
1841 PL_generation = 100; \
1842 PL_exitlist = NULL; \
1843 PL_exitlistlen = 0; \
1845 PL_in_clean_objs = FALSE; \
1846 PL_in_clean_all = FALSE; \
1847 PL_profiledata = NULL; \
1849 PL_rsfp_filters = Nullav; \
1853 # ifdef MULTIPLICITY
1854 # define PERLVAR(var,type)
1855 # define PERLVARI(var,type,init) PL_curinterp->var = init;
1856 # define PERLVARIC(var,type,init) PL_curinterp->var = init;
1857 # include "intrpvar.h"
1858 # ifndef USE_THREADS
1859 # include "thrdvar.h"
1865 # define PERLVAR(var,type)
1866 # define PERLVARI(var,type,init) PL_##var = init;
1867 # define PERLVARIC(var,type,init) PL_##var = init;
1868 # include "intrpvar.h"
1869 # ifndef USE_THREADS
1870 # include "thrdvar.h"
1881 init_main_stash(void)
1886 /* Note that strtab is a rather special HV. Assumptions are made
1887 about not iterating on it, and not adding tie magic to it.
1888 It is properly deallocated in perl_destruct() */
1889 PL_strtab = newHV();
1890 HvSHAREKEYS_off(PL_strtab); /* mandatory */
1891 hv_ksplit(PL_strtab, 512);
1893 PL_curstash = PL_defstash = newHV();
1894 PL_curstname = newSVpv("main",4);
1895 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1896 SvREFCNT_dec(GvHV(gv));
1897 GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash);
1899 HvNAME(PL_defstash) = savepv("main");
1900 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1901 GvMULTI_on(PL_incgv);
1902 PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
1903 GvMULTI_on(PL_hintgv);
1904 PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1905 PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1906 GvMULTI_on(PL_errgv);
1907 PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
1908 GvMULTI_on(PL_replgv);
1909 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1910 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1911 sv_setpvn(ERRSV, "", 0);
1912 PL_curstash = PL_defstash;
1913 PL_compiling.cop_stash = PL_defstash;
1914 PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1915 PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1916 /* We must init $/ before switches are processed. */
1917 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1921 open_script(char *scriptname, bool dosearch, SV *sv, int *fdscript)
1929 PL_origfilename = savepv("-e");
1932 /* if find_script() returns, it returns a malloc()-ed value */
1933 PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
1935 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1936 char *s = scriptname + 8;
1937 *fdscript = atoi(s);
1941 scriptname = savepv(s + 1);
1942 Safefree(PL_origfilename);
1943 PL_origfilename = scriptname;
1948 PL_curcop->cop_filegv = gv_fetchfile(PL_origfilename);
1949 if (strEQ(PL_origfilename,"-"))
1951 if (*fdscript >= 0) {
1952 PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1953 #if defined(HAS_FCNTL) && defined(F_SETFD)
1955 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
1958 else if (PL_preprocess) {
1959 char *cpp_cfg = CPPSTDIN;
1960 SV *cpp = newSVpv("",0);
1961 SV *cmd = NEWSV(0,0);
1963 if (strEQ(cpp_cfg, "cppstdin"))
1964 sv_catpvf(cpp, "%s/", BIN_EXP);
1965 sv_catpv(cpp, cpp_cfg);
1968 sv_catpv(sv,PRIVLIB_EXP);
1972 sed %s -e \"/^[^#]/b\" \
1973 -e \"/^#[ ]*include[ ]/b\" \
1974 -e \"/^#[ ]*define[ ]/b\" \
1975 -e \"/^#[ ]*if[ ]/b\" \
1976 -e \"/^#[ ]*ifdef[ ]/b\" \
1977 -e \"/^#[ ]*ifndef[ ]/b\" \
1978 -e \"/^#[ ]*else/b\" \
1979 -e \"/^#[ ]*elif[ ]/b\" \
1980 -e \"/^#[ ]*undef[ ]/b\" \
1981 -e \"/^#[ ]*endif/b\" \
1984 (PL_doextract ? "-e \"1,/^#/d\n\"" : ""),
1987 %s %s -e '/^[^#]/b' \
1988 -e '/^#[ ]*include[ ]/b' \
1989 -e '/^#[ ]*define[ ]/b' \
1990 -e '/^#[ ]*if[ ]/b' \
1991 -e '/^#[ ]*ifdef[ ]/b' \
1992 -e '/^#[ ]*ifndef[ ]/b' \
1993 -e '/^#[ ]*else/b' \
1994 -e '/^#[ ]*elif[ ]/b' \
1995 -e '/^#[ ]*undef[ ]/b' \
1996 -e '/^#[ ]*endif/b' \
2004 (PL_doextract ? "-e '1,/^#/d\n'" : ""),
2006 scriptname, cpp, sv, CPPMINUS);
2007 PL_doextract = FALSE;
2008 #ifdef IAMSUID /* actually, this is caught earlier */
2009 if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */
2011 (void)seteuid(PL_uid); /* musn't stay setuid root */
2014 (void)setreuid((Uid_t)-1, PL_uid);
2016 #ifdef HAS_SETRESUID
2017 (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1);
2019 PerlProc_setuid(PL_uid);
2023 if (PerlProc_geteuid() != PL_uid)
2024 croak("Can't do seteuid!\n");
2026 #endif /* IAMSUID */
2027 PL_rsfp = PerlProc_popen(SvPVX(cmd), "r");
2031 else if (!*scriptname) {
2032 forbid_setid("program input from stdin");
2033 PL_rsfp = PerlIO_stdin();
2036 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2037 #if defined(HAS_FCNTL) && defined(F_SETFD)
2039 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */
2044 #ifndef IAMSUID /* in case script is not readable before setuid */
2046 PerlLIO_stat(SvPVX(GvSV(PL_curcop->cop_filegv)),&PL_statbuf) >= 0 &&
2047 PL_statbuf.st_mode & (S_ISUID|S_ISGID))
2050 PerlProc_execv(form("%s/sperl%s", BIN_EXP, PL_patchlevel), PL_origargv);
2051 croak("Can't do setuid\n");
2055 croak("Can't open perl script \"%s\": %s\n",
2056 SvPVX(GvSV(PL_curcop->cop_filegv)), Strerror(errno));
2061 validate_suid(char *validarg, char *scriptname, int fdscript)
2065 /* do we need to emulate setuid on scripts? */
2067 /* This code is for those BSD systems that have setuid #! scripts disabled
2068 * in the kernel because of a security problem. Merely defining DOSUID
2069 * in perl will not fix that problem, but if you have disabled setuid
2070 * scripts in the kernel, this will attempt to emulate setuid and setgid
2071 * on scripts that have those now-otherwise-useless bits set. The setuid
2072 * root version must be called suidperl or sperlN.NNN. If regular perl
2073 * discovers that it has opened a setuid script, it calls suidperl with
2074 * the same argv that it had. If suidperl finds that the script it has
2075 * just opened is NOT setuid root, it sets the effective uid back to the
2076 * uid. We don't just make perl setuid root because that loses the
2077 * effective uid we had before invoking perl, if it was different from the
2080 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2081 * be defined in suidperl only. suidperl must be setuid root. The
2082 * Configure script will set this up for you if you want it.
2089 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
2090 croak("Can't stat script \"%s\"",PL_origfilename);
2091 if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
2095 #ifndef HAS_SETREUID
2096 /* On this access check to make sure the directories are readable,
2097 * there is actually a small window that the user could use to make
2098 * filename point to an accessible directory. So there is a faint
2099 * chance that someone could execute a setuid script down in a
2100 * non-accessible directory. I don't know what to do about that.
2101 * But I don't think it's too important. The manual lies when
2102 * it says access() is useful in setuid programs.
2104 if (PerlLIO_access(SvPVX(GvSV(PL_curcop->cop_filegv)),1)) /*double check*/
2105 croak("Permission denied");
2107 /* If we can swap euid and uid, then we can determine access rights
2108 * with a simple stat of the file, and then compare device and
2109 * inode to make sure we did stat() on the same file we opened.
2110 * Then we just have to make sure he or she can execute it.
2113 struct stat tmpstatbuf;
2117 setreuid(PL_euid,PL_uid) < 0
2120 setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0
2123 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
2124 croak("Can't swap uid and euid"); /* really paranoid */
2125 if (PerlLIO_stat(SvPVX(GvSV(PL_curcop->cop_filegv)),&tmpstatbuf) < 0)
2126 croak("Permission denied"); /* testing full pathname here */
2127 if (tmpstatbuf.st_dev != PL_statbuf.st_dev ||
2128 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
2129 (void)PerlIO_close(PL_rsfp);
2130 if (PL_rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2131 PerlIO_printf(PL_rsfp,
2132 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2133 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2134 (long)PL_uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2135 (long)PL_statbuf.st_dev, (long)PL_statbuf.st_ino,
2136 SvPVX(GvSV(PL_curcop->cop_filegv)),
2137 (long)PL_statbuf.st_uid, (long)PL_statbuf.st_gid);
2138 (void)PerlProc_pclose(PL_rsfp);
2140 croak("Permission denied\n");
2144 setreuid(PL_uid,PL_euid) < 0
2146 # if defined(HAS_SETRESUID)
2147 setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0
2150 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
2151 croak("Can't reswap uid and euid");
2152 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
2153 croak("Permission denied\n");
2155 #endif /* HAS_SETREUID */
2156 #endif /* IAMSUID */
2158 if (!S_ISREG(PL_statbuf.st_mode))
2159 croak("Permission denied");
2160 if (PL_statbuf.st_mode & S_IWOTH)
2161 croak("Setuid/gid script is writable by world");
2162 PL_doswitches = FALSE; /* -s is insecure in suid */
2163 PL_curcop->cop_line++;
2164 if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch ||
2165 strnNE(SvPV(PL_linestr,PL_na),"#!",2) ) /* required even on Sys V */
2166 croak("No #! line");
2167 s = SvPV(PL_linestr,PL_na)+2;
2169 while (!isSPACE(*s)) s++;
2170 for (s2 = s; (s2 > SvPV(PL_linestr,PL_na)+2 &&
2171 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2172 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2173 croak("Not a perl script");
2174 while (*s == ' ' || *s == '\t') s++;
2176 * #! arg must be what we saw above. They can invoke it by
2177 * mentioning suidperl explicitly, but they may not add any strange
2178 * arguments beyond what #! says if they do invoke suidperl that way.
2180 len = strlen(validarg);
2181 if (strEQ(validarg," PHOOEY ") ||
2182 strnNE(s,validarg,len) || !isSPACE(s[len]))
2183 croak("Args must match #! line");
2186 if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
2187 PL_euid == PL_statbuf.st_uid)
2189 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2190 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2191 #endif /* IAMSUID */
2193 if (PL_euid) { /* oops, we're not the setuid root perl */
2194 (void)PerlIO_close(PL_rsfp);
2197 PerlProc_execv(form("%s/sperl%s", BIN_EXP, PL_patchlevel), PL_origargv);
2199 croak("Can't do setuid\n");
2202 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
2204 (void)setegid(PL_statbuf.st_gid);
2207 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
2209 #ifdef HAS_SETRESGID
2210 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
2212 PerlProc_setgid(PL_statbuf.st_gid);
2216 if (PerlProc_getegid() != PL_statbuf.st_gid)
2217 croak("Can't do setegid!\n");
2219 if (PL_statbuf.st_mode & S_ISUID) {
2220 if (PL_statbuf.st_uid != PL_euid)
2222 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
2225 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
2227 #ifdef HAS_SETRESUID
2228 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
2230 PerlProc_setuid(PL_statbuf.st_uid);
2234 if (PerlProc_geteuid() != PL_statbuf.st_uid)
2235 croak("Can't do seteuid!\n");
2237 else if (PL_uid) { /* oops, mustn't run as root */
2239 (void)seteuid((Uid_t)PL_uid);
2242 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
2244 #ifdef HAS_SETRESUID
2245 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
2247 PerlProc_setuid((Uid_t)PL_uid);
2251 if (PerlProc_geteuid() != PL_uid)
2252 croak("Can't do seteuid!\n");
2255 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
2256 croak("Permission denied\n"); /* they can't do this */
2259 else if (PL_preprocess)
2260 croak("-P not allowed for setuid/setgid script\n");
2261 else if (fdscript >= 0)
2262 croak("fd script not allowed in suidperl\n");
2264 croak("Script is not setuid/setgid in suidperl\n");
2266 /* We absolutely must clear out any saved ids here, so we */
2267 /* exec the real perl, substituting fd script for scriptname. */
2268 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2269 PerlIO_rewind(PL_rsfp);
2270 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
2271 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
2272 if (!PL_origargv[which])
2273 croak("Permission denied");
2274 PL_origargv[which] = savepv(form("/dev/fd/%d/%s",
2275 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
2276 #if defined(HAS_FCNTL) && defined(F_SETFD)
2277 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
2279 PerlProc_execv(form("%s/perl%s", BIN_EXP, PL_patchlevel), PL_origargv);/* try again */
2280 croak("Can't do setuid\n");
2281 #endif /* IAMSUID */
2283 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
2284 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2286 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
2287 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
2289 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
2292 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2293 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2294 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2295 /* not set-id, must be wrapped */
2301 find_beginning(void)
2303 register char *s, *s2;
2305 /* skip forward in input to the real script? */
2308 while (PL_doextract) {
2309 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch)
2310 croak("No Perl script found in input\n");
2311 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2312 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
2313 PL_doextract = FALSE;
2314 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2316 while (*s == ' ' || *s == '\t') s++;
2318 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2319 if (strnEQ(s2-4,"perl",4))
2321 while (s = moreswitches(s)) ;
2323 if (PL_cddir && PerlDir_chdir(PL_cddir) < 0)
2324 croak("Can't chdir to %s",PL_cddir);
2333 PL_uid = (int)PerlProc_getuid();
2334 PL_euid = (int)PerlProc_geteuid();
2335 PL_gid = (int)PerlProc_getgid();
2336 PL_egid = (int)PerlProc_getegid();
2338 PL_uid |= PL_gid << 16;
2339 PL_euid |= PL_egid << 16;
2341 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
2345 forbid_setid(char *s)
2347 if (PL_euid != PL_uid)
2348 croak("No %s allowed while running setuid", s);
2349 if (PL_egid != PL_gid)
2350 croak("No %s allowed while running setgid", s);
2357 PL_curstash = PL_debstash;
2358 PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2359 AvREAL_off(PL_dbargs);
2360 PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2361 PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2362 PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2363 PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2364 sv_setiv(PL_DBsingle, 0);
2365 PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2366 sv_setiv(PL_DBtrace, 0);
2367 PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2368 sv_setiv(PL_DBsignal, 0);
2369 PL_curstash = PL_defstash;
2372 #ifndef STRESS_REALLOC
2373 #define REASONABLE(size) (size)
2375 #define REASONABLE(size) (1) /* unreasonable */
2379 init_stacks(ARGSproto)
2381 /* start with 128-item stack and 8K cxstack */
2382 PL_curstackinfo = new_stackinfo(REASONABLE(128),
2383 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
2384 PL_curstackinfo->si_type = PERLSI_MAIN;
2385 PL_curstack = PL_curstackinfo->si_stack;
2386 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
2388 PL_stack_base = AvARRAY(PL_curstack);
2389 PL_stack_sp = PL_stack_base;
2390 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
2392 New(50,PL_tmps_stack,REASONABLE(128),SV*);
2395 PL_tmps_max = REASONABLE(128);
2397 New(54,PL_markstack,REASONABLE(32),I32);
2398 PL_markstack_ptr = PL_markstack;
2399 PL_markstack_max = PL_markstack + REASONABLE(32);
2403 New(54,PL_scopestack,REASONABLE(32),I32);
2404 PL_scopestack_ix = 0;
2405 PL_scopestack_max = REASONABLE(32);
2407 New(54,PL_savestack,REASONABLE(128),ANY);
2408 PL_savestack_ix = 0;
2409 PL_savestack_max = REASONABLE(128);
2411 New(54,PL_retstack,REASONABLE(16),OP*);
2413 PL_retstack_max = REASONABLE(16);
2422 while (PL_curstackinfo->si_next)
2423 PL_curstackinfo = PL_curstackinfo->si_next;
2424 while (PL_curstackinfo) {
2425 PERL_SI *p = PL_curstackinfo->si_prev;
2426 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
2427 Safefree(PL_curstackinfo->si_cxstack);
2428 Safefree(PL_curstackinfo);
2429 PL_curstackinfo = p;
2431 Safefree(PL_tmps_stack);
2432 Safefree(PL_markstack);
2433 Safefree(PL_scopestack);
2434 Safefree(PL_savestack);
2435 Safefree(PL_retstack);
2437 Safefree(PL_debname);
2438 Safefree(PL_debdelim);
2443 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2454 lex_start(PL_linestr);
2456 PL_subname = newSVpv("main",4);
2460 init_predump_symbols(void)
2466 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2467 PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2468 GvMULTI_on(PL_stdingv);
2469 IoIFP(GvIOp(PL_stdingv)) = PerlIO_stdin();
2470 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2472 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(PL_stdingv));
2474 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2476 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2478 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2480 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(PL_defoutgv));
2482 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2483 GvMULTI_on(othergv);
2484 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2485 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2487 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2489 PL_statname = NEWSV(66,0); /* last filename we did stat on */
2492 PL_osname = savepv(OSNAME);
2496 init_postdump_symbols(register int argc, register char **argv, register char **env)
2503 argc--,argv++; /* skip name of script */
2504 if (PL_doswitches) {
2505 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2508 if (argv[0][1] == '-') {
2512 if (s = strchr(argv[0], '=')) {
2514 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2517 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2520 PL_toptarget = NEWSV(0,0);
2521 sv_upgrade(PL_toptarget, SVt_PVFM);
2522 sv_setpvn(PL_toptarget, "", 0);
2523 PL_bodytarget = NEWSV(0,0);
2524 sv_upgrade(PL_bodytarget, SVt_PVFM);
2525 sv_setpvn(PL_bodytarget, "", 0);
2526 PL_formtarget = PL_bodytarget;
2529 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2530 sv_setpv(GvSV(tmpgv),PL_origfilename);
2531 magicname("0", "0", 1);
2533 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2534 sv_setpv(GvSV(tmpgv),PL_origargv[0]);
2535 if (PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2536 GvMULTI_on(PL_argvgv);
2537 (void)gv_AVadd(PL_argvgv);
2538 av_clear(GvAVn(PL_argvgv));
2539 for (; argc > 0; argc--,argv++) {
2540 av_push(GvAVn(PL_argvgv),newSVpv(argv[0],0));
2543 if (PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2545 GvMULTI_on(PL_envgv);
2546 hv = GvHVn(PL_envgv);
2547 hv_magic(hv, PL_envgv, 'E');
2548 #ifndef VMS /* VMS doesn't have environ array */
2549 /* Note that if the supplied env parameter is actually a copy
2550 of the global environ then it may now point to free'd memory
2551 if the environment has been modified since. To avoid this
2552 problem we treat env==NULL as meaning 'use the default'
2557 environ[0] = Nullch;
2558 for (; *env; env++) {
2559 if (!(s = strchr(*env,'=')))
2565 sv = newSVpv(s--,0);
2566 (void)hv_store(hv, *env, s - *env, sv, 0);
2568 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2569 /* Sins of the RTL. See note in my_setenv(). */
2570 (void)PerlEnv_putenv(savepv(*env));
2574 #ifdef DYNAMIC_ENV_FETCH
2575 HvNAME(hv) = savepv(ENV_HV_NAME);
2579 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2580 sv_setiv(GvSV(tmpgv), (IV)getpid());
2589 s = PerlEnv_getenv("PERL5LIB");
2593 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2595 /* Treat PERL5?LIB as a possible search list logical name -- the
2596 * "natural" VMS idiom for a Unix path string. We allow each
2597 * element to be a set of |-separated directories for compatibility.
2601 if (my_trnlnm("PERL5LIB",buf,0))
2602 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2604 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2608 /* Use the ~-expanded versions of APPLLIB (undocumented),
2609 ARCHLIB PRIVLIB SITEARCH and SITELIB
2612 incpush(APPLLIB_EXP, TRUE);
2616 incpush(ARCHLIB_EXP, FALSE);
2619 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2622 incpush(PRIVLIB_EXP, TRUE);
2624 incpush(PRIVLIB_EXP, FALSE);
2628 incpush(SITEARCH_EXP, FALSE);
2632 incpush(SITELIB_EXP, TRUE);
2634 incpush(SITELIB_EXP, FALSE);
2638 incpush(".", FALSE);
2642 # define PERLLIB_SEP ';'
2645 # define PERLLIB_SEP '|'
2647 # define PERLLIB_SEP ':'
2650 #ifndef PERLLIB_MANGLE
2651 # define PERLLIB_MANGLE(s,n) (s)
2655 incpush(char *p, int addsubdirs)
2657 SV *subdir = Nullsv;
2663 subdir = sv_newmortal();
2664 if (!PL_archpat_auto) {
2665 STRLEN len = (sizeof(ARCHNAME) + strlen(PL_patchlevel)
2666 + sizeof("//auto"));
2667 New(55, PL_archpat_auto, len, char);
2668 sprintf(PL_archpat_auto, "/%s/%s/auto", ARCHNAME, PL_patchlevel);
2670 for (len = sizeof(ARCHNAME) + 2;
2671 PL_archpat_auto[len] != '\0' && PL_archpat_auto[len] != '/'; len++)
2672 if (PL_archpat_auto[len] == '.') PL_archpat_auto[len] = '_';
2677 /* Break at all separators */
2679 SV *libdir = NEWSV(55,0);
2682 /* skip any consecutive separators */
2683 while ( *p == PERLLIB_SEP ) {
2684 /* Uncomment the next line for PATH semantics */
2685 /* av_push(GvAVn(PL_incgv), newSVpv(".", 1)); */
2689 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2690 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2695 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2696 p = Nullch; /* break out */
2700 * BEFORE pushing libdir onto @INC we may first push version- and
2701 * archname-specific sub-directories.
2704 struct stat tmpstatbuf;
2709 if ((unix = tounixspec_ts(SvPV(libdir,PL_na),Nullch)) != Nullch) {
2711 while (unix[len-1] == '/') len--; /* Cosmetic */
2712 sv_usepvn(libdir,unix,len);
2715 PerlIO_printf(PerlIO_stderr(),
2716 "Failed to unixify @INC element \"%s\"\n",
2717 SvPV(libdir,PL_na));
2719 /* .../archname/version if -d .../archname/version/auto */
2720 sv_setsv(subdir, libdir);
2721 sv_catpv(subdir, PL_archpat_auto);
2722 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2723 S_ISDIR(tmpstatbuf.st_mode))
2724 av_push(GvAVn(PL_incgv),
2725 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2727 /* .../archname if -d .../archname/auto */
2728 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2729 strlen(PL_patchlevel) + 1, "", 0);
2730 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2731 S_ISDIR(tmpstatbuf.st_mode))
2732 av_push(GvAVn(PL_incgv),
2733 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2736 /* finally push this lib directory on the end of @INC */
2737 av_push(GvAVn(PL_incgv), libdir);
2742 STATIC struct perl_thread *
2745 struct perl_thread *thr;
2748 Newz(53, thr, 1, struct perl_thread);
2749 PL_curcop = &PL_compiling;
2750 thr->cvcache = newHV();
2751 thr->threadsv = newAV();
2752 /* thr->threadsvp is set when find_threadsv is called */
2753 thr->specific = newAV();
2754 thr->errhv = newHV();
2755 thr->flags = THRf_R_JOINABLE;
2756 MUTEX_INIT(&thr->mutex);
2757 /* Handcraft thrsv similarly to mess_sv */
2758 New(53, PL_thrsv, 1, SV);
2759 Newz(53, xpv, 1, XPV);
2760 SvFLAGS(PL_thrsv) = SVt_PV;
2761 SvANY(PL_thrsv) = (void*)xpv;
2762 SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */
2763 SvPVX(PL_thrsv) = (char*)thr;
2764 SvCUR_set(PL_thrsv, sizeof(thr));
2765 SvLEN_set(PL_thrsv, sizeof(thr));
2766 *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */
2767 thr->oursv = PL_thrsv;
2768 PL_chopset = " \n-";
2770 MUTEX_LOCK(&PL_threads_mutex);
2775 MUTEX_UNLOCK(&PL_threads_mutex);
2777 #ifdef HAVE_THREAD_INTERN
2778 init_thread_intern(thr);
2781 #ifdef SET_THREAD_SELF
2782 SET_THREAD_SELF(thr);
2784 thr->self = pthread_self();
2785 #endif /* SET_THREAD_SELF */
2789 * These must come after the SET_THR because sv_setpvn does
2790 * SvTAINT and the taint fields require dTHR.
2792 PL_toptarget = NEWSV(0,0);
2793 sv_upgrade(PL_toptarget, SVt_PVFM);
2794 sv_setpvn(PL_toptarget, "", 0);
2795 PL_bodytarget = NEWSV(0,0);
2796 sv_upgrade(PL_bodytarget, SVt_PVFM);
2797 sv_setpvn(PL_bodytarget, "", 0);
2798 PL_formtarget = PL_bodytarget;
2799 thr->errsv = newSVpv("", 0);
2800 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2803 PL_regcompp = FUNC_NAME_TO_PTR(pregcomp);
2804 PL_regexecp = FUNC_NAME_TO_PTR(regexec_flags);
2806 PL_reginterp_cnt = 0;
2810 #endif /* USE_THREADS */
2813 call_list(I32 oldscope, AV *paramList)
2816 line_t oldline = PL_curcop->cop_line;
2821 while (AvFILL(paramList) >= 0) {
2822 CV *cv = (CV*)av_shift(paramList);
2830 PUSHMARK(PL_stack_sp);
2831 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2832 (void)SvPV(atsv, len);
2835 PL_curcop = &PL_compiling;
2836 PL_curcop->cop_line = oldline;
2837 if (paramList == PL_beginav)
2838 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2840 sv_catpv(atsv, "END failed--cleanup aborted");
2841 while (PL_scopestack_ix > oldscope)
2843 croak("%s", SvPVX(atsv));
2851 /* my_exit() was called */
2852 while (PL_scopestack_ix > oldscope)
2855 PL_curstash = PL_defstash;
2857 call_list(oldscope, PL_endav);
2859 PL_curcop = &PL_compiling;
2860 PL_curcop->cop_line = oldline;
2861 if (PL_statusvalue) {
2862 if (paramList == PL_beginav)
2863 croak("BEGIN failed--compilation aborted");
2865 croak("END failed--cleanup aborted");
2870 if (!PL_restartop) {
2871 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2876 PL_curcop = &PL_compiling;
2877 PL_curcop->cop_line = oldline;
2890 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2891 thr, (unsigned long) status));
2892 #endif /* USE_THREADS */
2901 STATUS_NATIVE_SET(status);
2908 my_failure_exit(void)
2911 if (vaxc$errno & 1) {
2912 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2913 STATUS_NATIVE_SET(44);
2916 if (!vaxc$errno && errno) /* unlikely */
2917 STATUS_NATIVE_SET(44);
2919 STATUS_NATIVE_SET(vaxc$errno);
2924 STATUS_POSIX_SET(errno);
2926 exitstatus = STATUS_POSIX >> 8;
2927 if (exitstatus & 255)
2928 STATUS_POSIX_SET(exitstatus);
2930 STATUS_POSIX_SET(255);
2940 register PERL_CONTEXT *cx;
2945 SvREFCNT_dec(PL_e_script);
2946 PL_e_script = Nullsv;
2949 POPSTACK_TO(PL_mainstack);
2950 if (cxstack_ix >= 0) {
2953 POPBLOCK(cx,PL_curpm);
2965 read_e_script(CPerlObj *pPerl, int idx, SV *buf_sv, int maxlen)
2967 read_e_script(int idx, SV *buf_sv, int maxlen)
2971 p = SvPVX(PL_e_script);
2972 nl = strchr(p, '\n');
2973 nl = (nl) ? nl+1 : SvEND(PL_e_script);
2976 sv_catpvn(buf_sv, p, nl-p);
2977 sv_chop(PL_e_script, nl);