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
52 curcop = &compiling; \
59 laststype = OP_STAT; \
61 maxsysfd = MAXSYSFD; \
68 laststype = OP_STAT; \
72 static void find_beginning _((void));
73 static void forbid_setid _((char *));
74 static void incpush _((char *, int));
75 static void init_ids _((void));
76 static void init_debugger _((void));
77 static void init_lexer _((void));
78 static void init_main_stash _((void));
80 static struct perl_thread * init_main_thread _((void));
81 #endif /* USE_THREADS */
82 static void init_perllib _((void));
83 static void init_postdump_symbols _((int, char **, char **));
84 static void init_predump_symbols _((void));
85 static void my_exit_jump _((void)) __attribute__((noreturn));
86 static void nuke_stacks _((void));
87 static void open_script _((char *, bool, SV *));
88 static void usage _((char *));
89 static void validate_suid _((char *, char*));
91 static int fdscript = -1;
96 PerlInterpreter *sv_interp;
99 New(53, sv_interp, 1, PerlInterpreter);
104 perl_construct(register PerlInterpreter *sv_interp)
109 struct perl_thread *thr;
110 #endif /* FAKE_THREADS */
111 #endif /* USE_THREADS */
113 if (!(curinterp = sv_interp))
117 Zero(sv_interp, 1, PerlInterpreter);
120 /* Init the real globals (and main thread)? */
125 #ifdef ALLOC_THREAD_KEY
128 if (pthread_key_create(&thr_key, 0))
129 croak("panic: pthread_key_create");
131 MUTEX_INIT(&sv_mutex);
133 * Safe to use basic SV functions from now on (though
134 * not things like mortals or tainting yet).
136 MUTEX_INIT(&eval_mutex);
137 COND_INIT(&eval_cond);
138 MUTEX_INIT(&threads_mutex);
139 COND_INIT(&nthreads_cond);
140 #ifdef EMULATE_ATOMIC_REFCOUNTS
141 MUTEX_INIT(&svref_mutex);
142 #endif /* EMULATE_ATOMIC_REFCOUNTS */
144 thr = init_main_thread();
145 #endif /* USE_THREADS */
147 linestr = NEWSV(65,80);
148 sv_upgrade(linestr,SVt_PVIV);
150 if (!SvREADONLY(&sv_undef)) {
151 SvREADONLY_on(&sv_undef);
155 SvREADONLY_on(&sv_no);
157 sv_setpv(&sv_yes,Yes);
159 SvREADONLY_on(&sv_yes);
162 nrs = newSVpv("\n", 1);
163 rs = SvREFCNT_inc(nrs);
165 sighandlerp = sighandler;
170 * There is no way we can refer to them from Perl so close them to save
171 * space. The other alternative would be to provide STDAUX and STDPRN
174 (void)fclose(stdaux);
175 (void)fclose(stdprn);
182 perl_destruct_level = 1;
184 if(perl_destruct_level > 0)
189 lex_state = LEX_NOTPARSING;
191 start_env.je_prev = NULL;
192 start_env.je_ret = -1;
193 start_env.je_mustcatch = TRUE;
194 top_env = &start_env;
197 SET_NUMERIC_STANDARD();
198 #if defined(SUBVERSION) && SUBVERSION > 0
199 sprintf(patchlevel, "%7.5f", (double) 5
200 + ((double) PATCHLEVEL / (double) 1000)
201 + ((double) SUBVERSION / (double) 100000));
203 sprintf(patchlevel, "%5.3f", (double) 5 +
204 ((double) PATCHLEVEL / (double) 1000));
207 #if defined(LOCAL_PATCH_COUNT)
208 localpatches = local_patches; /* For possible -v */
211 PerlIO_init(); /* Hook to IO system */
213 fdpid = newAV(); /* for remembering popen pids by fd */
214 modglobal = newHV(); /* pointers to per-interpreter module globals */
217 New(51,debname,128,char);
218 New(52,debdelim,128,char);
225 perl_destruct(register PerlInterpreter *sv_interp)
228 int destruct_level; /* 0=none, 1=full, 2=full with checks */
233 #endif /* USE_THREADS */
235 if (!(curinterp = sv_interp))
240 /* Pass 1 on any remaining threads: detach joinables, join zombies */
242 MUTEX_LOCK(&threads_mutex);
243 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
244 "perl_destruct: waiting for %d threads...\n",
246 for (t = thr->next; t != thr; t = t->next) {
247 MUTEX_LOCK(&t->mutex);
248 switch (ThrSTATE(t)) {
251 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
252 "perl_destruct: joining zombie %p\n", t));
253 ThrSETSTATE(t, THRf_DEAD);
254 MUTEX_UNLOCK(&t->mutex);
257 * The SvREFCNT_dec below may take a long time (e.g. av
258 * may contain an object scalar whose destructor gets
259 * called) so we have to unlock threads_mutex and start
262 MUTEX_UNLOCK(&threads_mutex);
264 SvREFCNT_dec((SV*)av);
265 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
266 "perl_destruct: joined zombie %p OK\n", t));
268 case THRf_R_JOINABLE:
269 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
270 "perl_destruct: detaching thread %p\n", t));
271 ThrSETSTATE(t, THRf_R_DETACHED);
273 * We unlock threads_mutex and t->mutex in the opposite order
274 * from which we locked them just so that DETACH won't
275 * deadlock if it panics. It's only a breach of good style
276 * not a bug since they are unlocks not locks.
278 MUTEX_UNLOCK(&threads_mutex);
280 MUTEX_UNLOCK(&t->mutex);
283 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
284 "perl_destruct: ignoring %p (state %u)\n",
286 MUTEX_UNLOCK(&t->mutex);
287 /* fall through and out */
290 /* We leave the above "Pass 1" loop with threads_mutex still locked */
292 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
295 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
296 "perl_destruct: final wait for %d threads\n",
298 COND_WAIT(&nthreads_cond, &threads_mutex);
300 /* At this point, we're the last thread */
301 MUTEX_UNLOCK(&threads_mutex);
302 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
303 MUTEX_DESTROY(&threads_mutex);
304 COND_DESTROY(&nthreads_cond);
305 #endif /* !defined(FAKE_THREADS) */
306 #endif /* USE_THREADS */
308 destruct_level = perl_destruct_level;
312 if (s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL")) {
314 if (destruct_level < i)
323 /* We must account for everything. */
325 /* Destroy the main CV and syntax tree */
327 curpad = AvARRAY(comppad);
333 SvREFCNT_dec(main_cv);
338 * Try to destruct global references. We do this first so that the
339 * destructors and destructees still exist. Some sv's might remain.
340 * Non-referenced objects are on their own.
347 /* unhook hooks which will soon be, or use, destroyed data */
348 SvREFCNT_dec(warnhook);
350 SvREFCNT_dec(diehook);
352 SvREFCNT_dec(parsehook);
355 /* call exit list functions */
356 while (exitlistlen-- > 0)
357 exitlist[exitlistlen].fn(exitlist[exitlistlen].ptr);
361 if (destruct_level == 0){
363 DEBUG_P(debprofdump());
365 /* The exit() function will do everything that needs doing. */
369 /* loosen bonds of global variables */
372 (void)PerlIO_close(rsfp);
376 /* Filters for program text */
377 SvREFCNT_dec(rsfp_filters);
378 rsfp_filters = Nullav;
390 sawampersand = FALSE; /* must save all match strings */
391 sawstudy = FALSE; /* do fbm_instr on all strings */
406 /* magical thingies */
408 Safefree(ofs); /* $, */
411 Safefree(ors); /* $\ */
414 SvREFCNT_dec(nrs); /* $\ helper */
417 multiline = 0; /* $* */
419 SvREFCNT_dec(statname);
423 /* defgv, aka *_ should be taken care of elsewhere */
425 /* clean up after study() */
426 SvREFCNT_dec(lastscream);
428 Safefree(screamfirst);
430 Safefree(screamnext);
433 /* startup and shutdown function lists */
434 SvREFCNT_dec(beginav);
436 SvREFCNT_dec(initav);
441 /* shortcuts just get cleared */
451 /* reset so print() ends up where we expect */
454 /* Prepare to destruct main symbol table. */
461 if (destruct_level >= 2) {
462 if (scopestack_ix != 0)
463 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
464 (long)scopestack_ix);
465 if (savestack_ix != 0)
466 warn("Unbalanced saves: %ld more saves than restores\n",
468 if (tmps_floor != -1)
469 warn("Unbalanced tmps: %ld more allocs than frees\n",
470 (long)tmps_floor + 1);
471 if (cxstack_ix != -1)
472 warn("Unbalanced context: %ld more PUSHes than POPs\n",
473 (long)cxstack_ix + 1);
476 /* Now absolutely destruct everything, somehow or other, loops or no. */
478 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
479 while (sv_count != 0 && sv_count != last_sv_count) {
480 last_sv_count = sv_count;
483 SvFLAGS(strtab) &= ~SVTYPEMASK;
484 SvFLAGS(strtab) |= SVt_PVHV;
486 /* Destruct the global string table. */
488 /* Yell and reset the HeVAL() slots that are still holding refcounts,
489 * so that sv_free() won't fail on them.
498 array = HvARRAY(strtab);
502 warn("Unbalanced string table refcount: (%d) for \"%s\"",
503 HeVAL(hent) - Nullsv, HeKEY(hent));
504 HeVAL(hent) = Nullsv;
514 SvREFCNT_dec(strtab);
517 warn("Scalars leaked: %ld\n", (long)sv_count);
521 /* No SVs have survived, need to clean out */
525 Safefree(origfilename);
527 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
529 DEBUG_P(debprofdump());
531 MUTEX_DESTROY(&sv_mutex);
532 MUTEX_DESTROY(&eval_mutex);
533 COND_DESTROY(&eval_cond);
535 /* As the penultimate thing, free the non-arena SV for thrsv */
536 Safefree(SvPVX(thrsv));
537 Safefree(SvANY(thrsv));
540 #endif /* USE_THREADS */
542 /* As the absolutely last thing, free the non-arena SV for mess() */
545 /* we know that type >= SVt_PV */
547 Safefree(SvPVX(mess_sv));
548 Safefree(SvANY(mess_sv));
555 perl_free(PerlInterpreter *sv_interp)
557 if (!(curinterp = sv_interp))
563 perl_atexit(void (*fn) (void *), void *ptr)
565 Renew(exitlist, exitlistlen+1, PerlExitListEntry);
566 exitlist[exitlistlen].fn = fn;
567 exitlist[exitlistlen].ptr = ptr;
572 perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char **argv, char **env)
577 char *scriptname = NULL;
578 VOL bool dosearch = FALSE;
586 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
589 croak("suidperl is no longer needed since the kernel can now execute\n\
590 setuid perl scripts securely.\n");
594 if (!(curinterp = sv_interp))
597 #if defined(NeXT) && defined(__DYNAMIC__)
598 _dyld_lookup_and_bind
599 ("__environ", (unsigned long *) &environ_pointer, NULL);
604 #ifndef VMS /* VMS doesn't have environ array */
605 origenviron = environ;
611 /* Come here if running an undumped a.out. */
613 origfilename = savepv(argv[0]);
615 cxstack_ix = -1; /* start label stack again */
617 init_postdump_symbols(argc,argv,env);
622 curpad = AvARRAY(comppad);
627 SvREFCNT_dec(main_cv);
631 oldscope = scopestack_ix;
639 /* my_exit() was called */
640 while (scopestack_ix > oldscope)
645 call_list(oldscope, endav);
647 return STATUS_NATIVE_EXPORT;
650 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
654 sv_setpvn(linestr,"",0);
655 sv = newSVpv("",0); /* first used for -I flags */
659 for (argc--,argv++; argc > 0; argc--,argv++) {
660 if (argv[0][0] != '-' || !argv[0][1])
664 validarg = " PHOOEY ";
689 if (s = moreswitches(s))
699 if (euid != uid || egid != gid)
700 croak("No -e allowed in setuid scripts");
703 int oldumask = PerlLIO_umask(0177);
705 e_tmpname = savepv(TMPPATH);
707 e_tmpfd = PerlLIO_mkstemp(e_tmpname);
708 #else /* use mktemp() */
709 (void)PerlLIO_mktemp(e_tmpname);
711 croak("Cannot generate temporary filename");
712 # if defined(HAS_OPEN3) && defined(O_EXCL)
713 e_tmpfd = open(e_tmpname,
714 O_WRONLY | O_CREAT | O_EXCL,
717 (void)UNLINK(e_tmpname);
718 /* Yes, potential race. But at least we can say we tried. */
719 e_fp = PerlIO_open(e_tmpname,"w");
721 #endif /* ifdef HAS_MKSTEMP */
722 #if defined(HAS_MKSTEMP) || (defined(HAS_OPEN3) && defined(O_EXCL))
724 croak("Cannot create temporary file \"%s\"", e_tmpname);
725 e_fp = PerlIO_fdopen(e_tmpfd,"w");
728 croak("Cannot create temporary file \"%s\"", e_tmpname);
730 (void)PerlLIO_umask(oldumask);
736 PerlIO_puts(e_fp,argv[1]);
740 croak("No code specified for -e");
741 (void)PerlIO_putc(e_fp,'\n');
743 case 'I': /* -I handled both here and in moreswitches() */
745 if (!*++s && (s=argv[1]) != Nullch) {
748 while (s && isSPACE(*s))
752 for (e = s; *e && !isSPACE(*e); e++) ;
759 } /* XXX else croak? */
773 preambleav = newAV();
774 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
776 Sv = newSVpv("print myconfig();",0);
778 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
780 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
782 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
783 sv_catpv(Sv,"\" Compile-time options:");
785 sv_catpv(Sv," DEBUGGING");
788 sv_catpv(Sv," NO_EMBED");
791 sv_catpv(Sv," MULTIPLICITY");
793 sv_catpv(Sv,"\\n\",");
795 #if defined(LOCAL_PATCH_COUNT)
796 if (LOCAL_PATCH_COUNT > 0) {
798 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
799 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
801 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
805 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
808 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
810 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
815 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
816 print \" \\%ENV:\\n @env\\n\" if @env; \
817 print \" \\@INC:\\n @INC\\n\";");
820 Sv = newSVpv("config_vars(qw(",0);
825 av_push(preambleav, Sv);
826 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
837 if (!*++s || isSPACE(*s)) {
841 /* catch use of gnu style long options */
842 if (strEQ(s, "version")) {
846 if (strEQ(s, "help")) {
853 croak("Unrecognized switch: -%s (-h will show valid options)",s);
858 if (!tainting && (s = PerlEnv_getenv("PERL5OPT"))) {
869 if (!strchr("DIMUdmw", *s))
870 croak("Illegal switch in PERL5OPT: -%c", *s);
876 scriptname = argv[0];
878 if (PerlIO_flush(e_fp) || PerlIO_error(e_fp) || PerlIO_close(e_fp)) {
880 warn("Did you forget to compile with -DMULTIPLICITY?");
882 croak("Can't write to temp file for -e: %s", Strerror(errno));
886 scriptname = e_tmpname;
888 else if (scriptname == Nullch) {
890 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
898 open_script(scriptname,dosearch,sv);
900 validate_suid(validarg, scriptname);
905 main_cv = compcv = (CV*)NEWSV(1104,0);
906 sv_upgrade((SV *)compcv, SVt_PVCV);
910 av_push(comppad, Nullsv);
911 curpad = AvARRAY(comppad);
912 comppad_name = newAV();
913 comppad_name_fill = 0;
914 min_intro_pending = 0;
917 av_store(comppad_name, 0, newSVpv("@_", 2));
918 curpad[0] = (SV*)newAV();
919 SvPADMY_on(curpad[0]); /* XXX Needed? */
921 New(666, CvMUTEXP(compcv), 1, perl_mutex);
922 MUTEX_INIT(CvMUTEXP(compcv));
923 #endif /* USE_THREADS */
925 comppadlist = newAV();
926 AvREAL_off(comppadlist);
927 av_store(comppadlist, 0, (SV*)comppad_name);
928 av_store(comppadlist, 1, (SV*)comppad);
929 CvPADLIST(compcv) = comppadlist;
931 boot_core_UNIVERSAL();
933 (*xsinit)(); /* in case linked C routines want magical variables */
934 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
938 init_predump_symbols();
940 init_postdump_symbols(argc,argv,env);
944 /* now parse the script */
946 SETERRNO(0,SS$_NORMAL);
948 if (yyparse() || error_count) {
950 croak("%s had compilation errors.\n", origfilename);
952 croak("Execution of %s aborted due to compilation errors.\n",
956 curcop->cop_line = 0;
960 (void)UNLINK(e_tmpname);
966 /* now that script is parsed, we can modify record separator */
968 rs = SvREFCNT_inc(nrs);
969 sv_setsv(perl_get_sv("/", TRUE), rs);
980 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
981 dump_mstats("after compilation:");
991 perl_run(PerlInterpreter *sv_interp)
998 if (!(curinterp = sv_interp))
1001 oldscope = scopestack_ix;
1006 cxstack_ix = -1; /* start context stack again */
1009 /* my_exit() was called */
1010 while (scopestack_ix > oldscope)
1013 curstash = defstash;
1015 call_list(oldscope, endav);
1017 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1018 dump_mstats("after execution: ");
1021 return STATUS_NATIVE_EXPORT;
1024 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1029 POPSTACK_TO(mainstack);
1033 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1034 sawampersand ? "Enabling" : "Omitting"));
1037 DEBUG_x(dump_all());
1038 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1040 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1041 (unsigned long) thr));
1042 #endif /* USE_THREADS */
1045 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1048 if (PERLDB_SINGLE && DBsingle)
1049 sv_setiv(DBsingle, 1);
1051 call_list(oldscope, initav);
1061 else if (main_start) {
1062 CvDEPTH(main_cv) = 1;
1073 perl_get_sv(char *name, I32 create)
1077 if (name[1] == '\0' && !isALPHA(name[0])) {
1078 PADOFFSET tmp = find_threadsv(name);
1079 if (tmp != NOT_IN_PAD) {
1081 return THREADSV(tmp);
1084 #endif /* USE_THREADS */
1085 gv = gv_fetchpv(name, create, SVt_PV);
1092 perl_get_av(char *name, I32 create)
1094 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1103 perl_get_hv(char *name, I32 create)
1105 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1114 perl_get_cv(char *name, I32 create)
1116 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1117 if (create && !GvCVu(gv))
1118 return newSUB(start_subparse(FALSE, 0),
1119 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1127 /* Be sure to refetch the stack pointer after calling these routines. */
1130 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1132 /* See G_* flags in cop.h */
1133 /* null terminated arg list */
1140 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1145 return perl_call_pv(sub_name, flags);
1149 perl_call_pv(char *sub_name, I32 flags)
1150 /* name of the subroutine */
1151 /* See G_* flags in cop.h */
1153 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1157 perl_call_method(char *methname, I32 flags)
1158 /* name of the subroutine */
1159 /* See G_* flags in cop.h */
1165 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1168 return perl_call_sv(*stack_sp--, flags);
1171 /* May be called with any of a CV, a GV, or an SV containing the name. */
1173 perl_call_sv(SV *sv, I32 flags)
1175 /* See G_* flags in cop.h */
1178 LOGOP myop; /* fake syntax tree node */
1183 bool oldcatch = CATCH_GET;
1188 if (flags & G_DISCARD) {
1193 Zero(&myop, 1, LOGOP);
1194 myop.op_next = Nullop;
1195 if (!(flags & G_NOARGS))
1196 myop.op_flags |= OPf_STACKED;
1197 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1198 (flags & G_ARRAY) ? OPf_WANT_LIST :
1203 EXTEND(stack_sp, 1);
1206 oldscope = scopestack_ix;
1208 if (PERLDB_SUB && curstash != debstash
1209 /* Handle first BEGIN of -d. */
1210 && (DBcv || (DBcv = GvCV(DBsub)))
1211 /* Try harder, since this may have been a sighandler, thus
1212 * curstash may be meaningless. */
1213 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash)
1214 && !(flags & G_NODEBUG))
1215 op->op_private |= OPpENTERSUB_DB;
1217 if (flags & G_EVAL) {
1218 cLOGOP->op_other = op;
1220 /* we're trying to emulate pp_entertry() here */
1222 register PERL_CONTEXT *cx;
1223 I32 gimme = GIMME_V;
1228 push_return(op->op_next);
1229 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1231 eval_root = op; /* Only needed so that goto works right. */
1234 if (flags & G_KEEPERR)
1249 /* my_exit() was called */
1250 curstash = defstash;
1254 croak("Callback called exit");
1263 stack_sp = stack_base + oldmark;
1264 if (flags & G_ARRAY)
1268 *++stack_sp = &sv_undef;
1276 if (op == (OP*)&myop)
1277 op = pp_entersub(ARGS);
1280 retval = stack_sp - (stack_base + oldmark);
1281 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1285 if (flags & G_EVAL) {
1286 if (scopestack_ix > oldscope) {
1290 register PERL_CONTEXT *cx;
1302 CATCH_SET(oldcatch);
1304 if (flags & G_DISCARD) {
1305 stack_sp = stack_base + oldmark;
1314 /* Eval a string. The G_EVAL flag is always assumed. */
1317 perl_eval_sv(SV *sv, I32 flags)
1319 /* See G_* flags in cop.h */
1322 UNOP myop; /* fake syntax tree node */
1323 I32 oldmark = SP - stack_base;
1330 if (flags & G_DISCARD) {
1338 EXTEND(stack_sp, 1);
1340 oldscope = scopestack_ix;
1342 if (!(flags & G_NOARGS))
1343 myop.op_flags = OPf_STACKED;
1344 myop.op_next = Nullop;
1345 myop.op_type = OP_ENTEREVAL;
1346 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1347 (flags & G_ARRAY) ? OPf_WANT_LIST :
1349 if (flags & G_KEEPERR)
1350 myop.op_flags |= OPf_SPECIAL;
1360 /* my_exit() was called */
1361 curstash = defstash;
1365 croak("Callback called exit");
1374 stack_sp = stack_base + oldmark;
1375 if (flags & G_ARRAY)
1379 *++stack_sp = &sv_undef;
1384 if (op == (OP*)&myop)
1385 op = pp_entereval(ARGS);
1388 retval = stack_sp - (stack_base + oldmark);
1389 if (!(flags & G_KEEPERR))
1394 if (flags & G_DISCARD) {
1395 stack_sp = stack_base + oldmark;
1405 perl_eval_pv(char *p, I32 croak_on_error)
1408 SV* sv = newSVpv(p, 0);
1411 perl_eval_sv(sv, G_SCALAR);
1418 if (croak_on_error && SvTRUE(ERRSV))
1419 croak(SvPVx(ERRSV, na));
1424 /* Require a module. */
1427 perl_require_pv(char *pv)
1429 SV* sv = sv_newmortal();
1430 sv_setpv(sv, "require '");
1433 perl_eval_sv(sv, G_DISCARD);
1437 magicname(char *sym, char *name, I32 namlen)
1441 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1442 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1446 usage(char *name) /* XXX move this out into a module ? */
1449 /* This message really ought to be max 23 lines.
1450 * Removed -h because the user already knows that opton. Others? */
1452 static char *usage[] = {
1453 "-0[octal] specify record separator (\\0, if no argument)",
1454 "-a autosplit mode with -n or -p (splits $_ into @F)",
1455 "-c check syntax only (runs BEGIN and END blocks)",
1456 "-d[:debugger] run scripts under debugger",
1457 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1458 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1459 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1460 "-i[extension] edit <> files in place (make backup if extension supplied)",
1461 "-Idirectory specify @INC/#include directory (may be used more than once)",
1462 "-l[octal] enable line ending processing, specifies line terminator",
1463 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1464 "-n assume 'while (<>) { ... }' loop around your script",
1465 "-p assume loop like -n but print line also like sed",
1466 "-P run script through C preprocessor before compilation",
1467 "-s enable some switch parsing for switches after script name",
1468 "-S look for the script using PATH environment variable",
1469 "-T turn on tainting checks",
1470 "-u dump core after parsing script",
1471 "-U allow unsafe operations",
1472 "-v print version number, patchlevel plus VERY IMPORTANT perl info",
1473 "-V[:variable] print perl configuration information",
1474 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1475 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1481 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1483 printf("\n %s", *p++);
1486 /* This routine handles any switches that can be given during run */
1489 moreswitches(char *s)
1498 rschar = scan_oct(s, 4, &numlen);
1500 if (rschar & ~((U8)~0))
1502 else if (!rschar && numlen >= 2)
1503 nrs = newSVpv("", 0);
1506 nrs = newSVpv(&ch, 1);
1512 splitstr = savepv(s + 1);
1526 if (*s == ':' || *s == '=') {
1527 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1531 perldb = PERLDB_ALL;
1538 if (isALPHA(s[1])) {
1539 static char debopts[] = "psltocPmfrxuLHXD";
1542 for (s++; *s && (d = strchr(debopts,*s)); s++)
1543 debug |= 1 << (d - debopts);
1547 for (s++; isDIGIT(*s); s++) ;
1549 debug |= 0x80000000;
1551 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1552 for (s++; isALNUM(*s); s++) ;
1562 inplace = savepv(s+1);
1564 for (s = inplace; *s && !isSPACE(*s); s++) ;
1568 case 'I': /* -I handled both here and in parse_perl() */
1571 while (*s && isSPACE(*s))
1575 for (e = s; *e && !isSPACE(*e); e++) ;
1576 p = savepvn(s, e-s);
1582 croak("No space allowed after -I");
1592 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1602 ors = SvPV(nrs, orslen);
1603 ors = savepvn(ors, orslen);
1607 forbid_setid("-M"); /* XXX ? */
1610 forbid_setid("-m"); /* XXX ? */
1615 /* -M-foo == 'no foo' */
1616 if (*s == '-') { use = "no "; ++s; }
1617 sv = newSVpv(use,0);
1619 /* We allow -M'Module qw(Foo Bar)' */
1620 while(isALNUM(*s) || *s==':') ++s;
1622 sv_catpv(sv, start);
1623 if (*(start-1) == 'm') {
1625 croak("Can't use '%c' after -mname", *s);
1626 sv_catpv( sv, " ()");
1629 sv_catpvn(sv, start, s-start);
1630 sv_catpv(sv, " split(/,/,q{");
1635 if (preambleav == NULL)
1636 preambleav = newAV();
1637 av_push(preambleav, sv);
1640 croak("No space allowed after -%c", *(s-1));
1657 croak("Too late for \"-T\" option");
1669 #if defined(SUBVERSION) && SUBVERSION > 0
1670 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1671 PATCHLEVEL, SUBVERSION, ARCHNAME);
1673 printf("\nThis is perl, version %s built for %s",
1674 patchlevel, ARCHNAME);
1676 #if defined(LOCAL_PATCH_COUNT)
1677 if (LOCAL_PATCH_COUNT > 0)
1678 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1679 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1682 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1684 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1687 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1688 printf("djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1998\n");
1691 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1692 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1695 printf("atariST series port, ++jrb bammi@cadence.com\n");
1698 Perl may be copied only under the terms of either the Artistic License or the\n\
1699 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\
1700 Complete documentation for Perl, including FAQ lists, should be found on\n\
1701 this system using `man perl' or `perldoc perl'. If you have access to the\n\
1702 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
1710 if (s[1] == '-') /* Additional switches on #! line. */
1721 #ifdef ALTERNATE_SHEBANG
1722 case 'S': /* OS/2 needs -S on "extproc" line. */
1730 croak("Can't emulate -%.1s on #! line",s);
1735 /* compliments of Tom Christiansen */
1737 /* unexec() can be found in the Gnu emacs distribution */
1748 prog = newSVpv(BIN_EXP);
1749 sv_catpv(prog, "/perl");
1750 file = newSVpv(origfilename);
1751 sv_catpv(file, ".perldump");
1753 status = unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1755 PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n",
1756 SvPVX(prog), SvPVX(file));
1757 PerlProc_exit(status);
1760 # include <lib$routines.h>
1761 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1763 ABORT(); /* for use with undump */
1769 init_main_stash(void)
1774 /* Note that strtab is a rather special HV. Assumptions are made
1775 about not iterating on it, and not adding tie magic to it.
1776 It is properly deallocated in perl_destruct() */
1778 HvSHAREKEYS_off(strtab); /* mandatory */
1779 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1780 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1782 curstash = defstash = newHV();
1783 curstname = newSVpv("main",4);
1784 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1785 SvREFCNT_dec(GvHV(gv));
1786 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1788 HvNAME(defstash) = savepv("main");
1789 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1791 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1792 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1794 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1795 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1796 sv_setpvn(ERRSV, "", 0);
1797 curstash = defstash;
1798 compiling.cop_stash = defstash;
1799 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1800 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1801 /* We must init $/ before switches are processed. */
1802 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1806 open_script(char *scriptname, bool dosearch, SV *sv)
1811 scriptname = find_script(scriptname, dosearch, NULL, 0);
1813 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1814 char *s = scriptname + 8;
1823 origfilename = savepv(e_tmpname ? "-e" : scriptname);
1824 curcop->cop_filegv = gv_fetchfile(origfilename);
1825 if (strEQ(origfilename,"-"))
1827 if (fdscript >= 0) {
1828 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
1829 #if defined(HAS_FCNTL) && defined(F_SETFD)
1831 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1834 else if (preprocess) {
1835 char *cpp_cfg = CPPSTDIN;
1836 SV *cpp = NEWSV(0,0);
1837 SV *cmd = NEWSV(0,0);
1839 if (strEQ(cpp_cfg, "cppstdin"))
1840 sv_catpvf(cpp, "%s/", BIN_EXP);
1841 sv_catpv(cpp, cpp_cfg);
1844 sv_catpv(sv,PRIVLIB_EXP);
1848 sed %s -e \"/^[^#]/b\" \
1849 -e \"/^#[ ]*include[ ]/b\" \
1850 -e \"/^#[ ]*define[ ]/b\" \
1851 -e \"/^#[ ]*if[ ]/b\" \
1852 -e \"/^#[ ]*ifdef[ ]/b\" \
1853 -e \"/^#[ ]*ifndef[ ]/b\" \
1854 -e \"/^#[ ]*else/b\" \
1855 -e \"/^#[ ]*elif[ ]/b\" \
1856 -e \"/^#[ ]*undef[ ]/b\" \
1857 -e \"/^#[ ]*endif/b\" \
1860 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1863 %s %s -e '/^[^#]/b' \
1864 -e '/^#[ ]*include[ ]/b' \
1865 -e '/^#[ ]*define[ ]/b' \
1866 -e '/^#[ ]*if[ ]/b' \
1867 -e '/^#[ ]*ifdef[ ]/b' \
1868 -e '/^#[ ]*ifndef[ ]/b' \
1869 -e '/^#[ ]*else/b' \
1870 -e '/^#[ ]*elif[ ]/b' \
1871 -e '/^#[ ]*undef[ ]/b' \
1872 -e '/^#[ ]*endif/b' \
1880 (doextract ? "-e '1,/^#/d\n'" : ""),
1882 scriptname, cpp, sv, CPPMINUS);
1884 #ifdef IAMSUID /* actually, this is caught earlier */
1885 if (euid != uid && !euid) { /* if running suidperl */
1887 (void)seteuid(uid); /* musn't stay setuid root */
1890 (void)setreuid((Uid_t)-1, uid);
1892 #ifdef HAS_SETRESUID
1893 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
1899 if (geteuid() != uid)
1900 croak("Can't do seteuid!\n");
1902 #endif /* IAMSUID */
1903 rsfp = PerlProc_popen(SvPVX(cmd), "r");
1907 else if (!*scriptname) {
1908 forbid_setid("program input from stdin");
1909 rsfp = PerlIO_stdin();
1912 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1913 #if defined(HAS_FCNTL) && defined(F_SETFD)
1915 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1923 #ifndef IAMSUID /* in case script is not readable before setuid */
1924 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
1925 statbuf.st_mode & (S_ISUID|S_ISGID)) {
1927 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
1928 croak("Can't do setuid\n");
1932 croak("Can't open perl script \"%s\": %s\n",
1933 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
1938 validate_suid(char *validarg, char *scriptname)
1942 /* do we need to emulate setuid on scripts? */
1944 /* This code is for those BSD systems that have setuid #! scripts disabled
1945 * in the kernel because of a security problem. Merely defining DOSUID
1946 * in perl will not fix that problem, but if you have disabled setuid
1947 * scripts in the kernel, this will attempt to emulate setuid and setgid
1948 * on scripts that have those now-otherwise-useless bits set. The setuid
1949 * root version must be called suidperl or sperlN.NNN. If regular perl
1950 * discovers that it has opened a setuid script, it calls suidperl with
1951 * the same argv that it had. If suidperl finds that the script it has
1952 * just opened is NOT setuid root, it sets the effective uid back to the
1953 * uid. We don't just make perl setuid root because that loses the
1954 * effective uid we had before invoking perl, if it was different from the
1957 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
1958 * be defined in suidperl only. suidperl must be setuid root. The
1959 * Configure script will set this up for you if you want it.
1966 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
1967 croak("Can't stat script \"%s\"",origfilename);
1968 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
1972 #ifndef HAS_SETREUID
1973 /* On this access check to make sure the directories are readable,
1974 * there is actually a small window that the user could use to make
1975 * filename point to an accessible directory. So there is a faint
1976 * chance that someone could execute a setuid script down in a
1977 * non-accessible directory. I don't know what to do about that.
1978 * But I don't think it's too important. The manual lies when
1979 * it says access() is useful in setuid programs.
1981 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
1982 croak("Permission denied");
1984 /* If we can swap euid and uid, then we can determine access rights
1985 * with a simple stat of the file, and then compare device and
1986 * inode to make sure we did stat() on the same file we opened.
1987 * Then we just have to make sure he or she can execute it.
1990 struct stat tmpstatbuf;
1994 setreuid(euid,uid) < 0
1997 setresuid(euid,uid,(Uid_t)-1) < 0
2000 || getuid() != euid || geteuid() != uid)
2001 croak("Can't swap uid and euid"); /* really paranoid */
2002 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2003 croak("Permission denied"); /* testing full pathname here */
2004 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2005 tmpstatbuf.st_ino != statbuf.st_ino) {
2006 (void)PerlIO_close(rsfp);
2007 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2009 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2010 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2011 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2012 (long)statbuf.st_dev, (long)statbuf.st_ino,
2013 SvPVX(GvSV(curcop->cop_filegv)),
2014 (long)statbuf.st_uid, (long)statbuf.st_gid);
2015 (void)PerlProc_pclose(rsfp);
2017 croak("Permission denied\n");
2021 setreuid(uid,euid) < 0
2023 # if defined(HAS_SETRESUID)
2024 setresuid(uid,euid,(Uid_t)-1) < 0
2027 || getuid() != uid || geteuid() != euid)
2028 croak("Can't reswap uid and euid");
2029 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2030 croak("Permission denied\n");
2032 #endif /* HAS_SETREUID */
2033 #endif /* IAMSUID */
2035 if (!S_ISREG(statbuf.st_mode))
2036 croak("Permission denied");
2037 if (statbuf.st_mode & S_IWOTH)
2038 croak("Setuid/gid script is writable by world");
2039 doswitches = FALSE; /* -s is insecure in suid */
2041 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2042 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2043 croak("No #! line");
2044 s = SvPV(linestr,na)+2;
2046 while (!isSPACE(*s)) s++;
2047 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2048 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2049 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2050 croak("Not a perl script");
2051 while (*s == ' ' || *s == '\t') s++;
2053 * #! arg must be what we saw above. They can invoke it by
2054 * mentioning suidperl explicitly, but they may not add any strange
2055 * arguments beyond what #! says if they do invoke suidperl that way.
2057 len = strlen(validarg);
2058 if (strEQ(validarg," PHOOEY ") ||
2059 strnNE(s,validarg,len) || !isSPACE(s[len]))
2060 croak("Args must match #! line");
2063 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2064 euid == statbuf.st_uid)
2066 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2067 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2068 #endif /* IAMSUID */
2070 if (euid) { /* oops, we're not the setuid root perl */
2071 (void)PerlIO_close(rsfp);
2074 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2076 croak("Can't do setuid\n");
2079 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2081 (void)setegid(statbuf.st_gid);
2084 (void)setregid((Gid_t)-1,statbuf.st_gid);
2086 #ifdef HAS_SETRESGID
2087 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2089 setgid(statbuf.st_gid);
2093 if (getegid() != statbuf.st_gid)
2094 croak("Can't do setegid!\n");
2096 if (statbuf.st_mode & S_ISUID) {
2097 if (statbuf.st_uid != euid)
2099 (void)seteuid(statbuf.st_uid); /* all that for this */
2102 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2104 #ifdef HAS_SETRESUID
2105 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2107 setuid(statbuf.st_uid);
2111 if (geteuid() != statbuf.st_uid)
2112 croak("Can't do seteuid!\n");
2114 else if (uid) { /* oops, mustn't run as root */
2116 (void)seteuid((Uid_t)uid);
2119 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2121 #ifdef HAS_SETRESUID
2122 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2128 if (geteuid() != uid)
2129 croak("Can't do seteuid!\n");
2132 if (!cando(S_IXUSR,TRUE,&statbuf))
2133 croak("Permission denied\n"); /* they can't do this */
2136 else if (preprocess)
2137 croak("-P not allowed for setuid/setgid script\n");
2138 else if (fdscript >= 0)
2139 croak("fd script not allowed in suidperl\n");
2141 croak("Script is not setuid/setgid in suidperl\n");
2143 /* We absolutely must clear out any saved ids here, so we */
2144 /* exec the real perl, substituting fd script for scriptname. */
2145 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2146 PerlIO_rewind(rsfp);
2147 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2148 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2149 if (!origargv[which])
2150 croak("Permission denied");
2151 origargv[which] = savepv(form("/dev/fd/%d/%s",
2152 PerlIO_fileno(rsfp), origargv[which]));
2153 #if defined(HAS_FCNTL) && defined(F_SETFD)
2154 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2156 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2157 croak("Can't do setuid\n");
2158 #endif /* IAMSUID */
2160 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2161 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2163 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2164 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2166 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2169 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2170 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2171 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2172 /* not set-id, must be wrapped */
2178 find_beginning(void)
2180 register char *s, *s2;
2182 /* skip forward in input to the real script? */
2186 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2187 croak("No Perl script found in input\n");
2188 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2189 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2191 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2193 while (*s == ' ' || *s == '\t') s++;
2195 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2196 if (strnEQ(s2-4,"perl",4))
2198 while (s = moreswitches(s)) ;
2200 if (cddir && PerlDir_chdir(cddir) < 0)
2201 croak("Can't chdir to %s",cddir);
2209 uid = (int)getuid();
2210 euid = (int)geteuid();
2211 gid = (int)getgid();
2212 egid = (int)getegid();
2217 tainting |= (uid && (euid != uid || egid != gid));
2221 forbid_setid(char *s)
2224 croak("No %s allowed while running setuid", s);
2226 croak("No %s allowed while running setgid", s);
2233 curstash = debstash;
2234 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2236 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2237 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2238 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2239 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2240 sv_setiv(DBsingle, 0);
2241 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2242 sv_setiv(DBtrace, 0);
2243 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2244 sv_setiv(DBsignal, 0);
2245 curstash = defstash;
2248 #ifndef STRESS_REALLOC
2249 #define REASONABLE(size) (size)
2251 #define REASONABLE(size) (1) /* unreasonable */
2255 init_stacks(ARGSproto)
2257 /* start with 128-item stack and 8K cxstack */
2258 curstackinfo = new_stackinfo(REASONABLE(128),
2259 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
2260 curstackinfo->si_type = SI_MAIN;
2261 curstack = curstackinfo->si_stack;
2262 mainstack = curstack; /* remember in case we switch stacks */
2264 stack_base = AvARRAY(curstack);
2265 stack_sp = stack_base;
2266 stack_max = stack_base + AvMAX(curstack);
2268 New(50,tmps_stack,REASONABLE(128),SV*);
2271 tmps_max = REASONABLE(128);
2274 * The following stacks almost certainly should be per-interpreter,
2275 * but for now they're not. XXX
2279 markstack_ptr = markstack;
2281 New(54,markstack,REASONABLE(32),I32);
2282 markstack_ptr = markstack;
2283 markstack_max = markstack + REASONABLE(32);
2291 New(54,scopestack,REASONABLE(32),I32);
2293 scopestack_max = REASONABLE(32);
2299 New(54,savestack,REASONABLE(128),ANY);
2301 savestack_max = REASONABLE(128);
2307 New(54,retstack,REASONABLE(16),OP*);
2309 retstack_max = REASONABLE(16);
2319 while (curstackinfo->si_next)
2320 curstackinfo = curstackinfo->si_next;
2321 while (curstackinfo) {
2322 PERL_SI *p = curstackinfo->si_prev;
2323 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
2324 Safefree(curstackinfo->si_cxstack);
2325 Safefree(curstackinfo);
2328 Safefree(tmps_stack);
2335 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2344 subname = newSVpv("main",4);
2348 init_predump_symbols(void)
2354 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2355 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2356 GvMULTI_on(stdingv);
2357 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2358 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2360 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2362 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2364 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2366 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2368 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2370 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2371 GvMULTI_on(othergv);
2372 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2373 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2375 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2377 statname = NEWSV(66,0); /* last filename we did stat on */
2380 osname = savepv(OSNAME);
2384 init_postdump_symbols(register int argc, register char **argv, register char **env)
2391 argc--,argv++; /* skip name of script */
2393 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2396 if (argv[0][1] == '-') {
2400 if (s = strchr(argv[0], '=')) {
2402 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2405 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2408 toptarget = NEWSV(0,0);
2409 sv_upgrade(toptarget, SVt_PVFM);
2410 sv_setpvn(toptarget, "", 0);
2411 bodytarget = NEWSV(0,0);
2412 sv_upgrade(bodytarget, SVt_PVFM);
2413 sv_setpvn(bodytarget, "", 0);
2414 formtarget = bodytarget;
2417 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2418 sv_setpv(GvSV(tmpgv),origfilename);
2419 magicname("0", "0", 1);
2421 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2422 sv_setpv(GvSV(tmpgv),origargv[0]);
2423 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2425 (void)gv_AVadd(argvgv);
2426 av_clear(GvAVn(argvgv));
2427 for (; argc > 0; argc--,argv++) {
2428 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2431 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2435 hv_magic(hv, envgv, 'E');
2436 #ifndef VMS /* VMS doesn't have environ array */
2437 /* Note that if the supplied env parameter is actually a copy
2438 of the global environ then it may now point to free'd memory
2439 if the environment has been modified since. To avoid this
2440 problem we treat env==NULL as meaning 'use the default'
2445 environ[0] = Nullch;
2446 for (; *env; env++) {
2447 if (!(s = strchr(*env,'=')))
2450 #if defined(WIN32) || defined(MSDOS)
2453 sv = newSVpv(s--,0);
2454 (void)hv_store(hv, *env, s - *env, sv, 0);
2456 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2457 /* Sins of the RTL. See note in my_setenv(). */
2458 (void)PerlEnv_putenv(savepv(*env));
2462 #ifdef DYNAMIC_ENV_FETCH
2463 HvNAME(hv) = savepv(ENV_HV_NAME);
2467 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2468 sv_setiv(GvSV(tmpgv), (IV)getpid());
2477 s = PerlEnv_getenv("PERL5LIB");
2481 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2483 /* Treat PERL5?LIB as a possible search list logical name -- the
2484 * "natural" VMS idiom for a Unix path string. We allow each
2485 * element to be a set of |-separated directories for compatibility.
2489 if (my_trnlnm("PERL5LIB",buf,0))
2490 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2492 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2496 /* Use the ~-expanded versions of APPLLIB (undocumented),
2497 ARCHLIB PRIVLIB SITEARCH and SITELIB
2500 incpush(APPLLIB_EXP, TRUE);
2504 incpush(ARCHLIB_EXP, FALSE);
2507 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2509 incpush(PRIVLIB_EXP, FALSE);
2512 incpush(SITEARCH_EXP, FALSE);
2515 incpush(SITELIB_EXP, FALSE);
2518 incpush(".", FALSE);
2522 # define PERLLIB_SEP ';'
2525 # define PERLLIB_SEP '|'
2527 # define PERLLIB_SEP ':'
2530 #ifndef PERLLIB_MANGLE
2531 # define PERLLIB_MANGLE(s,n) (s)
2535 incpush(char *p, int addsubdirs)
2537 SV *subdir = Nullsv;
2538 static char *archpat_auto;
2544 subdir = NEWSV(55,0);
2545 if (!archpat_auto) {
2546 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2547 + sizeof("//auto"));
2548 New(55, archpat_auto, len, char);
2549 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2551 for (len = sizeof(ARCHNAME) + 2;
2552 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2553 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2558 /* Break at all separators */
2560 SV *libdir = NEWSV(55,0);
2563 /* skip any consecutive separators */
2564 while ( *p == PERLLIB_SEP ) {
2565 /* Uncomment the next line for PATH semantics */
2566 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2570 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2571 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2576 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2577 p = Nullch; /* break out */
2581 * BEFORE pushing libdir onto @INC we may first push version- and
2582 * archname-specific sub-directories.
2585 struct stat tmpstatbuf;
2590 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2592 while (unix[len-1] == '/') len--; /* Cosmetic */
2593 sv_usepvn(libdir,unix,len);
2596 PerlIO_printf(PerlIO_stderr(),
2597 "Failed to unixify @INC element \"%s\"\n",
2600 /* .../archname/version if -d .../archname/version/auto */
2601 sv_setsv(subdir, libdir);
2602 sv_catpv(subdir, archpat_auto);
2603 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2604 S_ISDIR(tmpstatbuf.st_mode))
2605 av_push(GvAVn(incgv),
2606 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2608 /* .../archname if -d .../archname/auto */
2609 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2610 strlen(patchlevel) + 1, "", 0);
2611 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2612 S_ISDIR(tmpstatbuf.st_mode))
2613 av_push(GvAVn(incgv),
2614 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2617 /* finally push this lib directory on the end of @INC */
2618 av_push(GvAVn(incgv), libdir);
2621 SvREFCNT_dec(subdir);
2625 static struct perl_thread *
2628 struct perl_thread *thr;
2631 Newz(53, thr, 1, struct perl_thread);
2632 curcop = &compiling;
2633 thr->cvcache = newHV();
2634 thr->threadsv = newAV();
2635 /* thr->threadsvp is set when find_threadsv is called */
2636 thr->specific = newAV();
2637 thr->errhv = newHV();
2638 thr->flags = THRf_R_JOINABLE;
2639 MUTEX_INIT(&thr->mutex);
2640 /* Handcraft thrsv similarly to mess_sv */
2641 New(53, thrsv, 1, SV);
2642 Newz(53, xpv, 1, XPV);
2643 SvFLAGS(thrsv) = SVt_PV;
2644 SvANY(thrsv) = (void*)xpv;
2645 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2646 SvPVX(thrsv) = (char*)thr;
2647 SvCUR_set(thrsv, sizeof(thr));
2648 SvLEN_set(thrsv, sizeof(thr));
2649 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2653 MUTEX_LOCK(&threads_mutex);
2658 MUTEX_UNLOCK(&threads_mutex);
2660 #ifdef HAVE_THREAD_INTERN
2661 init_thread_intern(thr);
2664 #ifdef SET_THREAD_SELF
2665 SET_THREAD_SELF(thr);
2667 thr->self = pthread_self();
2668 #endif /* SET_THREAD_SELF */
2672 * These must come after the SET_THR because sv_setpvn does
2673 * SvTAINT and the taint fields require dTHR.
2675 toptarget = NEWSV(0,0);
2676 sv_upgrade(toptarget, SVt_PVFM);
2677 sv_setpvn(toptarget, "", 0);
2678 bodytarget = NEWSV(0,0);
2679 sv_upgrade(bodytarget, SVt_PVFM);
2680 sv_setpvn(bodytarget, "", 0);
2681 formtarget = bodytarget;
2682 thr->errsv = newSVpv("", 0);
2683 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2686 #endif /* USE_THREADS */
2689 call_list(I32 oldscope, AV *list)
2692 line_t oldline = curcop->cop_line;
2697 while (AvFILL(list) >= 0) {
2698 CV *cv = (CV*)av_shift(list);
2707 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2708 (void)SvPV(atsv, len);
2711 curcop = &compiling;
2712 curcop->cop_line = oldline;
2713 if (list == beginav)
2714 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2716 sv_catpv(atsv, "END failed--cleanup aborted");
2717 while (scopestack_ix > oldscope)
2719 croak("%s", SvPVX(atsv));
2727 /* my_exit() was called */
2728 while (scopestack_ix > oldscope)
2731 curstash = defstash;
2733 call_list(oldscope, endav);
2735 curcop = &compiling;
2736 curcop->cop_line = oldline;
2738 if (list == beginav)
2739 croak("BEGIN failed--compilation aborted");
2741 croak("END failed--cleanup aborted");
2747 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2752 curcop = &compiling;
2753 curcop->cop_line = oldline;
2766 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2767 thr, (unsigned long) status));
2768 #endif /* USE_THREADS */
2777 STATUS_NATIVE_SET(status);
2784 my_failure_exit(void)
2787 if (vaxc$errno & 1) {
2788 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2789 STATUS_NATIVE_SET(44);
2792 if (!vaxc$errno && errno) /* unlikely */
2793 STATUS_NATIVE_SET(44);
2795 STATUS_NATIVE_SET(vaxc$errno);
2799 STATUS_POSIX_SET(errno);
2800 else if (STATUS_POSIX == 0)
2801 STATUS_POSIX_SET(255);
2810 register PERL_CONTEXT *cx;
2819 (void)UNLINK(e_tmpname);
2820 Safefree(e_tmpname);
2824 POPSTACK_TO(mainstack);
2825 if (cxstack_ix >= 0) {