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 ";
690 if (s = moreswitches(s))
700 if (euid != uid || egid != gid)
701 croak("No -e allowed in setuid scripts");
703 #if defined(HAS_UMASK) && !defined(VMS)
704 int oldumask = PerlLIO_umask(0177);
706 e_tmpname = savepv(TMPPATH);
708 e_tmpfd = PerlLIO_mkstemp(e_tmpname);
709 #else /* use mktemp() */
710 (void)PerlLIO_mktemp(e_tmpname);
712 croak("Cannot generate temporary filename");
713 # if defined(HAS_OPEN3) && defined(O_EXCL)
714 e_tmpfd = open(e_tmpname,
715 O_WRONLY | O_CREAT | O_EXCL,
718 (void)UNLINK(e_tmpname);
719 /* Yes, potential race. But at least we can say we tried. */
720 e_fp = PerlIO_open(e_tmpname,"w");
722 #endif /* ifdef HAS_MKSTEMP */
723 #if defined(HAS_MKSTEMP) || (defined(HAS_OPEN3) && defined(O_EXCL))
725 croak("Cannot create temporary file \"%s\"", e_tmpname);
726 e_fp = PerlIO_fdopen(e_tmpfd,"w");
729 croak("Cannot create temporary file \"%s\"", e_tmpname);
730 #if defined(HAS_UMASK) && !defined(VMS)
731 (void)PerlLIO_umask(oldumask);
737 PerlIO_puts(e_fp,argv[1]);
741 croak("No code specified for -e");
742 (void)PerlIO_putc(e_fp,'\n');
744 case 'I': /* -I handled both here and in moreswitches() */
746 if (!*++s && (s=argv[1]) != Nullch) {
749 while (s && isSPACE(*s))
753 for (e = s; *e && !isSPACE(*e); e++) ;
760 } /* XXX else croak? */
774 preambleav = newAV();
775 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
777 Sv = newSVpv("print myconfig();",0);
779 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
781 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
783 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
784 sv_catpv(Sv,"\" Compile-time options:");
786 sv_catpv(Sv," DEBUGGING");
789 sv_catpv(Sv," NO_EMBED");
792 sv_catpv(Sv," MULTIPLICITY");
794 sv_catpv(Sv,"\\n\",");
796 #if defined(LOCAL_PATCH_COUNT)
797 if (LOCAL_PATCH_COUNT > 0) {
799 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
800 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
802 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
806 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
809 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
811 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
816 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
817 print \" \\%ENV:\\n @env\\n\" if @env; \
818 print \" \\@INC:\\n @INC\\n\";");
821 Sv = newSVpv("config_vars(qw(",0);
826 av_push(preambleav, Sv);
827 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
838 if (!*++s || isSPACE(*s)) {
842 /* catch use of gnu style long options */
843 if (strEQ(s, "version")) {
847 if (strEQ(s, "help")) {
854 croak("Unrecognized switch: -%s (-h will show valid options)",s);
859 if (!tainting && (s = PerlEnv_getenv("PERL5OPT"))) {
870 if (!strchr("DIMUdmw", *s))
871 croak("Illegal switch in PERL5OPT: -%c", *s);
877 scriptname = argv[0];
879 if (PerlIO_flush(e_fp) || PerlIO_error(e_fp) || PerlIO_close(e_fp)) {
881 warn("Did you forget to compile with -DMULTIPLICITY?");
883 croak("Can't write to temp file for -e: %s", Strerror(errno));
887 scriptname = e_tmpname;
889 else if (scriptname == Nullch) {
891 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
899 open_script(scriptname,dosearch,sv);
901 validate_suid(validarg, scriptname);
906 main_cv = compcv = (CV*)NEWSV(1104,0);
907 sv_upgrade((SV *)compcv, SVt_PVCV);
911 av_push(comppad, Nullsv);
912 curpad = AvARRAY(comppad);
913 comppad_name = newAV();
914 comppad_name_fill = 0;
915 min_intro_pending = 0;
918 av_store(comppad_name, 0, newSVpv("@_", 2));
919 curpad[0] = (SV*)newAV();
920 SvPADMY_on(curpad[0]); /* XXX Needed? */
922 New(666, CvMUTEXP(compcv), 1, perl_mutex);
923 MUTEX_INIT(CvMUTEXP(compcv));
924 #endif /* USE_THREADS */
926 comppadlist = newAV();
927 AvREAL_off(comppadlist);
928 av_store(comppadlist, 0, (SV*)comppad_name);
929 av_store(comppadlist, 1, (SV*)comppad);
930 CvPADLIST(compcv) = comppadlist;
932 boot_core_UNIVERSAL();
934 (*xsinit)(); /* in case linked C routines want magical variables */
935 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
939 init_predump_symbols();
941 init_postdump_symbols(argc,argv,env);
945 /* now parse the script */
947 SETERRNO(0,SS$_NORMAL);
949 if (yyparse() || error_count) {
951 croak("%s had compilation errors.\n", origfilename);
953 croak("Execution of %s aborted due to compilation errors.\n",
957 curcop->cop_line = 0;
961 (void)UNLINK(e_tmpname);
967 /* now that script is parsed, we can modify record separator */
969 rs = SvREFCNT_inc(nrs);
970 sv_setsv(perl_get_sv("/", TRUE), rs);
981 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
982 dump_mstats("after compilation:");
992 perl_run(PerlInterpreter *sv_interp)
999 if (!(curinterp = sv_interp))
1002 oldscope = scopestack_ix;
1007 cxstack_ix = -1; /* start context stack again */
1010 /* my_exit() was called */
1011 while (scopestack_ix > oldscope)
1014 curstash = defstash;
1016 call_list(oldscope, endav);
1018 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1019 dump_mstats("after execution: ");
1022 return STATUS_NATIVE_EXPORT;
1025 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1030 POPSTACK_TO(mainstack);
1034 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1035 sawampersand ? "Enabling" : "Omitting"));
1038 DEBUG_x(dump_all());
1039 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1041 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1042 (unsigned long) thr));
1043 #endif /* USE_THREADS */
1046 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1049 if (PERLDB_SINGLE && DBsingle)
1050 sv_setiv(DBsingle, 1);
1052 call_list(oldscope, initav);
1062 else if (main_start) {
1063 CvDEPTH(main_cv) = 1;
1074 perl_get_sv(char *name, I32 create)
1078 if (name[1] == '\0' && !isALPHA(name[0])) {
1079 PADOFFSET tmp = find_threadsv(name);
1080 if (tmp != NOT_IN_PAD) {
1082 return THREADSV(tmp);
1085 #endif /* USE_THREADS */
1086 gv = gv_fetchpv(name, create, SVt_PV);
1093 perl_get_av(char *name, I32 create)
1095 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1104 perl_get_hv(char *name, I32 create)
1106 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1115 perl_get_cv(char *name, I32 create)
1117 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1118 if (create && !GvCVu(gv))
1119 return newSUB(start_subparse(FALSE, 0),
1120 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1128 /* Be sure to refetch the stack pointer after calling these routines. */
1131 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1133 /* See G_* flags in cop.h */
1134 /* null terminated arg list */
1141 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1146 return perl_call_pv(sub_name, flags);
1150 perl_call_pv(char *sub_name, I32 flags)
1151 /* name of the subroutine */
1152 /* See G_* flags in cop.h */
1154 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1158 perl_call_method(char *methname, I32 flags)
1159 /* name of the subroutine */
1160 /* See G_* flags in cop.h */
1166 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1169 return perl_call_sv(*stack_sp--, flags);
1172 /* May be called with any of a CV, a GV, or an SV containing the name. */
1174 perl_call_sv(SV *sv, I32 flags)
1176 /* See G_* flags in cop.h */
1179 LOGOP myop; /* fake syntax tree node */
1184 bool oldcatch = CATCH_GET;
1189 if (flags & G_DISCARD) {
1194 Zero(&myop, 1, LOGOP);
1195 myop.op_next = Nullop;
1196 if (!(flags & G_NOARGS))
1197 myop.op_flags |= OPf_STACKED;
1198 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1199 (flags & G_ARRAY) ? OPf_WANT_LIST :
1204 EXTEND(stack_sp, 1);
1207 oldscope = scopestack_ix;
1209 if (PERLDB_SUB && curstash != debstash
1210 /* Handle first BEGIN of -d. */
1211 && (DBcv || (DBcv = GvCV(DBsub)))
1212 /* Try harder, since this may have been a sighandler, thus
1213 * curstash may be meaningless. */
1214 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash)
1215 && !(flags & G_NODEBUG))
1216 op->op_private |= OPpENTERSUB_DB;
1218 if (flags & G_EVAL) {
1219 cLOGOP->op_other = op;
1221 /* we're trying to emulate pp_entertry() here */
1223 register PERL_CONTEXT *cx;
1224 I32 gimme = GIMME_V;
1229 push_return(op->op_next);
1230 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1232 eval_root = op; /* Only needed so that goto works right. */
1235 if (flags & G_KEEPERR)
1250 /* my_exit() was called */
1251 curstash = defstash;
1255 croak("Callback called exit");
1264 stack_sp = stack_base + oldmark;
1265 if (flags & G_ARRAY)
1269 *++stack_sp = &sv_undef;
1277 if (op == (OP*)&myop)
1278 op = pp_entersub(ARGS);
1281 retval = stack_sp - (stack_base + oldmark);
1282 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1286 if (flags & G_EVAL) {
1287 if (scopestack_ix > oldscope) {
1291 register PERL_CONTEXT *cx;
1303 CATCH_SET(oldcatch);
1305 if (flags & G_DISCARD) {
1306 stack_sp = stack_base + oldmark;
1315 /* Eval a string. The G_EVAL flag is always assumed. */
1318 perl_eval_sv(SV *sv, I32 flags)
1320 /* See G_* flags in cop.h */
1323 UNOP myop; /* fake syntax tree node */
1324 I32 oldmark = SP - stack_base;
1331 if (flags & G_DISCARD) {
1339 EXTEND(stack_sp, 1);
1341 oldscope = scopestack_ix;
1343 if (!(flags & G_NOARGS))
1344 myop.op_flags = OPf_STACKED;
1345 myop.op_next = Nullop;
1346 myop.op_type = OP_ENTEREVAL;
1347 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1348 (flags & G_ARRAY) ? OPf_WANT_LIST :
1350 if (flags & G_KEEPERR)
1351 myop.op_flags |= OPf_SPECIAL;
1361 /* my_exit() was called */
1362 curstash = defstash;
1366 croak("Callback called exit");
1375 stack_sp = stack_base + oldmark;
1376 if (flags & G_ARRAY)
1380 *++stack_sp = &sv_undef;
1385 if (op == (OP*)&myop)
1386 op = pp_entereval(ARGS);
1389 retval = stack_sp - (stack_base + oldmark);
1390 if (!(flags & G_KEEPERR))
1395 if (flags & G_DISCARD) {
1396 stack_sp = stack_base + oldmark;
1406 perl_eval_pv(char *p, I32 croak_on_error)
1409 SV* sv = newSVpv(p, 0);
1412 perl_eval_sv(sv, G_SCALAR);
1419 if (croak_on_error && SvTRUE(ERRSV))
1420 croak(SvPVx(ERRSV, na));
1425 /* Require a module. */
1428 perl_require_pv(char *pv)
1430 SV* sv = sv_newmortal();
1431 sv_setpv(sv, "require '");
1434 perl_eval_sv(sv, G_DISCARD);
1438 magicname(char *sym, char *name, I32 namlen)
1442 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1443 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1447 usage(char *name) /* XXX move this out into a module ? */
1450 /* This message really ought to be max 23 lines.
1451 * Removed -h because the user already knows that opton. Others? */
1453 static char *usage[] = {
1454 "-0[octal] specify record separator (\\0, if no argument)",
1455 "-a autosplit mode with -n or -p (splits $_ into @F)",
1456 "-c check syntax only (runs BEGIN and END blocks)",
1457 "-d[:debugger] run scripts under debugger",
1458 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1459 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1460 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1461 "-i[extension] edit <> files in place (make backup if extension supplied)",
1462 "-Idirectory specify @INC/#include directory (may be used more than once)",
1463 "-l[octal] enable line ending processing, specifies line terminator",
1464 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1465 "-n assume 'while (<>) { ... }' loop around your script",
1466 "-p assume loop like -n but print line also like sed",
1467 "-P run script through C preprocessor before compilation",
1468 "-s enable some switch parsing for switches after script name",
1469 "-S look for the script using PATH environment variable",
1470 "-T turn on tainting checks",
1471 "-u dump core after parsing script",
1472 "-U allow unsafe operations",
1473 "-v print version number, patchlevel plus VERY IMPORTANT perl info",
1474 "-V[:variable] print perl configuration information",
1475 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1476 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1482 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1484 printf("\n %s", *p++);
1487 /* This routine handles any switches that can be given during run */
1490 moreswitches(char *s)
1499 rschar = scan_oct(s, 4, &numlen);
1501 if (rschar & ~((U8)~0))
1503 else if (!rschar && numlen >= 2)
1504 nrs = newSVpv("", 0);
1507 nrs = newSVpv(&ch, 1);
1513 splitstr = savepv(s + 1);
1527 if (*s == ':' || *s == '=') {
1528 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1532 perldb = PERLDB_ALL;
1539 if (isALPHA(s[1])) {
1540 static char debopts[] = "psltocPmfrxuLHXD";
1543 for (s++; *s && (d = strchr(debopts,*s)); s++)
1544 debug |= 1 << (d - debopts);
1548 for (s++; isDIGIT(*s); s++) ;
1550 debug |= 0x80000000;
1552 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1553 for (s++; isALNUM(*s); s++) ;
1563 inplace = savepv(s+1);
1565 for (s = inplace; *s && !isSPACE(*s); s++) ;
1568 if (*s == '-') /* Additional switches on #! line. */
1572 case 'I': /* -I handled both here and in parse_perl() */
1575 while (*s && isSPACE(*s))
1579 for (e = s; *e && !isSPACE(*e); e++) ;
1580 p = savepvn(s, e-s);
1586 croak("No space allowed after -I");
1596 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1606 ors = SvPV(nrs, orslen);
1607 ors = savepvn(ors, orslen);
1611 forbid_setid("-M"); /* XXX ? */
1614 forbid_setid("-m"); /* XXX ? */
1619 /* -M-foo == 'no foo' */
1620 if (*s == '-') { use = "no "; ++s; }
1621 sv = newSVpv(use,0);
1623 /* We allow -M'Module qw(Foo Bar)' */
1624 while(isALNUM(*s) || *s==':') ++s;
1626 sv_catpv(sv, start);
1627 if (*(start-1) == 'm') {
1629 croak("Can't use '%c' after -mname", *s);
1630 sv_catpv( sv, " ()");
1633 sv_catpvn(sv, start, s-start);
1634 sv_catpv(sv, " split(/,/,q{");
1639 if (preambleav == NULL)
1640 preambleav = newAV();
1641 av_push(preambleav, sv);
1644 croak("No space allowed after -%c", *(s-1));
1661 croak("Too late for \"-T\" option");
1673 #if defined(SUBVERSION) && SUBVERSION > 0
1674 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1675 PATCHLEVEL, SUBVERSION, ARCHNAME);
1677 printf("\nThis is perl, version %s built for %s",
1678 patchlevel, ARCHNAME);
1680 #if defined(LOCAL_PATCH_COUNT)
1681 if (LOCAL_PATCH_COUNT > 0)
1682 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1683 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1686 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1688 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1691 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1692 printf("djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1998\n");
1695 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1696 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1699 printf("atariST series port, ++jrb bammi@cadence.com\n");
1702 Perl may be copied only under the terms of either the Artistic License or the\n\
1703 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\
1704 Complete documentation for Perl, including FAQ lists, should be found on\n\
1705 this system using `man perl' or `perldoc perl'. If you have access to the\n\
1706 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
1714 if (s[1] == '-') /* Additional switches on #! line. */
1725 #ifdef ALTERNATE_SHEBANG
1726 case 'S': /* OS/2 needs -S on "extproc" line. */
1734 croak("Can't emulate -%.1s on #! line",s);
1739 /* compliments of Tom Christiansen */
1741 /* unexec() can be found in the Gnu emacs distribution */
1752 prog = newSVpv(BIN_EXP);
1753 sv_catpv(prog, "/perl");
1754 file = newSVpv(origfilename);
1755 sv_catpv(file, ".perldump");
1757 status = unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1759 PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n",
1760 SvPVX(prog), SvPVX(file));
1761 PerlProc_exit(status);
1764 # include <lib$routines.h>
1765 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1767 ABORT(); /* for use with undump */
1773 init_main_stash(void)
1778 /* Note that strtab is a rather special HV. Assumptions are made
1779 about not iterating on it, and not adding tie magic to it.
1780 It is properly deallocated in perl_destruct() */
1782 HvSHAREKEYS_off(strtab); /* mandatory */
1783 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1784 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1786 curstash = defstash = newHV();
1787 curstname = newSVpv("main",4);
1788 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1789 SvREFCNT_dec(GvHV(gv));
1790 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1792 HvNAME(defstash) = savepv("main");
1793 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1795 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1796 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1798 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1799 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1800 sv_setpvn(ERRSV, "", 0);
1801 curstash = defstash;
1802 compiling.cop_stash = defstash;
1803 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1804 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1805 /* We must init $/ before switches are processed. */
1806 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1810 open_script(char *scriptname, bool dosearch, SV *sv)
1815 scriptname = find_script(scriptname, dosearch, NULL, 0);
1817 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1818 char *s = scriptname + 8;
1827 origfilename = savepv(e_tmpname ? "-e" : scriptname);
1828 curcop->cop_filegv = gv_fetchfile(origfilename);
1829 if (strEQ(origfilename,"-"))
1831 if (fdscript >= 0) {
1832 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
1833 #if defined(HAS_FCNTL) && defined(F_SETFD)
1835 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1838 else if (preprocess) {
1839 char *cpp_cfg = CPPSTDIN;
1840 SV *cpp = NEWSV(0,0);
1841 SV *cmd = NEWSV(0,0);
1843 if (strEQ(cpp_cfg, "cppstdin"))
1844 sv_catpvf(cpp, "%s/", BIN_EXP);
1845 sv_catpv(cpp, cpp_cfg);
1848 sv_catpv(sv,PRIVLIB_EXP);
1852 sed %s -e \"/^[^#]/b\" \
1853 -e \"/^#[ ]*include[ ]/b\" \
1854 -e \"/^#[ ]*define[ ]/b\" \
1855 -e \"/^#[ ]*if[ ]/b\" \
1856 -e \"/^#[ ]*ifdef[ ]/b\" \
1857 -e \"/^#[ ]*ifndef[ ]/b\" \
1858 -e \"/^#[ ]*else/b\" \
1859 -e \"/^#[ ]*elif[ ]/b\" \
1860 -e \"/^#[ ]*undef[ ]/b\" \
1861 -e \"/^#[ ]*endif/b\" \
1864 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1867 %s %s -e '/^[^#]/b' \
1868 -e '/^#[ ]*include[ ]/b' \
1869 -e '/^#[ ]*define[ ]/b' \
1870 -e '/^#[ ]*if[ ]/b' \
1871 -e '/^#[ ]*ifdef[ ]/b' \
1872 -e '/^#[ ]*ifndef[ ]/b' \
1873 -e '/^#[ ]*else/b' \
1874 -e '/^#[ ]*elif[ ]/b' \
1875 -e '/^#[ ]*undef[ ]/b' \
1876 -e '/^#[ ]*endif/b' \
1884 (doextract ? "-e '1,/^#/d\n'" : ""),
1886 scriptname, cpp, sv, CPPMINUS);
1888 #ifdef IAMSUID /* actually, this is caught earlier */
1889 if (euid != uid && !euid) { /* if running suidperl */
1891 (void)seteuid(uid); /* musn't stay setuid root */
1894 (void)setreuid((Uid_t)-1, uid);
1896 #ifdef HAS_SETRESUID
1897 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
1903 if (geteuid() != uid)
1904 croak("Can't do seteuid!\n");
1906 #endif /* IAMSUID */
1907 rsfp = PerlProc_popen(SvPVX(cmd), "r");
1911 else if (!*scriptname) {
1912 forbid_setid("program input from stdin");
1913 rsfp = PerlIO_stdin();
1916 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1917 #if defined(HAS_FCNTL) && defined(F_SETFD)
1919 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1927 #ifndef IAMSUID /* in case script is not readable before setuid */
1928 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
1929 statbuf.st_mode & (S_ISUID|S_ISGID)) {
1931 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
1932 croak("Can't do setuid\n");
1936 croak("Can't open perl script \"%s\": %s\n",
1937 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
1942 validate_suid(char *validarg, char *scriptname)
1946 /* do we need to emulate setuid on scripts? */
1948 /* This code is for those BSD systems that have setuid #! scripts disabled
1949 * in the kernel because of a security problem. Merely defining DOSUID
1950 * in perl will not fix that problem, but if you have disabled setuid
1951 * scripts in the kernel, this will attempt to emulate setuid and setgid
1952 * on scripts that have those now-otherwise-useless bits set. The setuid
1953 * root version must be called suidperl or sperlN.NNN. If regular perl
1954 * discovers that it has opened a setuid script, it calls suidperl with
1955 * the same argv that it had. If suidperl finds that the script it has
1956 * just opened is NOT setuid root, it sets the effective uid back to the
1957 * uid. We don't just make perl setuid root because that loses the
1958 * effective uid we had before invoking perl, if it was different from the
1961 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
1962 * be defined in suidperl only. suidperl must be setuid root. The
1963 * Configure script will set this up for you if you want it.
1970 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
1971 croak("Can't stat script \"%s\"",origfilename);
1972 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
1976 #ifndef HAS_SETREUID
1977 /* On this access check to make sure the directories are readable,
1978 * there is actually a small window that the user could use to make
1979 * filename point to an accessible directory. So there is a faint
1980 * chance that someone could execute a setuid script down in a
1981 * non-accessible directory. I don't know what to do about that.
1982 * But I don't think it's too important. The manual lies when
1983 * it says access() is useful in setuid programs.
1985 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
1986 croak("Permission denied");
1988 /* If we can swap euid and uid, then we can determine access rights
1989 * with a simple stat of the file, and then compare device and
1990 * inode to make sure we did stat() on the same file we opened.
1991 * Then we just have to make sure he or she can execute it.
1994 struct stat tmpstatbuf;
1998 setreuid(euid,uid) < 0
2001 setresuid(euid,uid,(Uid_t)-1) < 0
2004 || getuid() != euid || geteuid() != uid)
2005 croak("Can't swap uid and euid"); /* really paranoid */
2006 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2007 croak("Permission denied"); /* testing full pathname here */
2008 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2009 tmpstatbuf.st_ino != statbuf.st_ino) {
2010 (void)PerlIO_close(rsfp);
2011 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2013 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2014 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2015 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2016 (long)statbuf.st_dev, (long)statbuf.st_ino,
2017 SvPVX(GvSV(curcop->cop_filegv)),
2018 (long)statbuf.st_uid, (long)statbuf.st_gid);
2019 (void)PerlProc_pclose(rsfp);
2021 croak("Permission denied\n");
2025 setreuid(uid,euid) < 0
2027 # if defined(HAS_SETRESUID)
2028 setresuid(uid,euid,(Uid_t)-1) < 0
2031 || getuid() != uid || geteuid() != euid)
2032 croak("Can't reswap uid and euid");
2033 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2034 croak("Permission denied\n");
2036 #endif /* HAS_SETREUID */
2037 #endif /* IAMSUID */
2039 if (!S_ISREG(statbuf.st_mode))
2040 croak("Permission denied");
2041 if (statbuf.st_mode & S_IWOTH)
2042 croak("Setuid/gid script is writable by world");
2043 doswitches = FALSE; /* -s is insecure in suid */
2045 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2046 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2047 croak("No #! line");
2048 s = SvPV(linestr,na)+2;
2050 while (!isSPACE(*s)) s++;
2051 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2052 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2053 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2054 croak("Not a perl script");
2055 while (*s == ' ' || *s == '\t') s++;
2057 * #! arg must be what we saw above. They can invoke it by
2058 * mentioning suidperl explicitly, but they may not add any strange
2059 * arguments beyond what #! says if they do invoke suidperl that way.
2061 len = strlen(validarg);
2062 if (strEQ(validarg," PHOOEY ") ||
2063 strnNE(s,validarg,len) || !isSPACE(s[len]))
2064 croak("Args must match #! line");
2067 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2068 euid == statbuf.st_uid)
2070 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2071 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2072 #endif /* IAMSUID */
2074 if (euid) { /* oops, we're not the setuid root perl */
2075 (void)PerlIO_close(rsfp);
2078 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2080 croak("Can't do setuid\n");
2083 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2085 (void)setegid(statbuf.st_gid);
2088 (void)setregid((Gid_t)-1,statbuf.st_gid);
2090 #ifdef HAS_SETRESGID
2091 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2093 setgid(statbuf.st_gid);
2097 if (getegid() != statbuf.st_gid)
2098 croak("Can't do setegid!\n");
2100 if (statbuf.st_mode & S_ISUID) {
2101 if (statbuf.st_uid != euid)
2103 (void)seteuid(statbuf.st_uid); /* all that for this */
2106 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2108 #ifdef HAS_SETRESUID
2109 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2111 setuid(statbuf.st_uid);
2115 if (geteuid() != statbuf.st_uid)
2116 croak("Can't do seteuid!\n");
2118 else if (uid) { /* oops, mustn't run as root */
2120 (void)seteuid((Uid_t)uid);
2123 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2125 #ifdef HAS_SETRESUID
2126 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2132 if (geteuid() != uid)
2133 croak("Can't do seteuid!\n");
2136 if (!cando(S_IXUSR,TRUE,&statbuf))
2137 croak("Permission denied\n"); /* they can't do this */
2140 else if (preprocess)
2141 croak("-P not allowed for setuid/setgid script\n");
2142 else if (fdscript >= 0)
2143 croak("fd script not allowed in suidperl\n");
2145 croak("Script is not setuid/setgid in suidperl\n");
2147 /* We absolutely must clear out any saved ids here, so we */
2148 /* exec the real perl, substituting fd script for scriptname. */
2149 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2150 PerlIO_rewind(rsfp);
2151 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2152 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2153 if (!origargv[which])
2154 croak("Permission denied");
2155 origargv[which] = savepv(form("/dev/fd/%d/%s",
2156 PerlIO_fileno(rsfp), origargv[which]));
2157 #if defined(HAS_FCNTL) && defined(F_SETFD)
2158 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2160 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2161 croak("Can't do setuid\n");
2162 #endif /* IAMSUID */
2164 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2165 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2167 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2168 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2170 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2173 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2174 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2175 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2176 /* not set-id, must be wrapped */
2182 find_beginning(void)
2184 register char *s, *s2;
2186 /* skip forward in input to the real script? */
2190 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2191 croak("No Perl script found in input\n");
2192 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2193 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2195 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2197 while (*s == ' ' || *s == '\t') s++;
2199 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2200 if (strnEQ(s2-4,"perl",4))
2202 while (s = moreswitches(s)) ;
2204 if (cddir && PerlDir_chdir(cddir) < 0)
2205 croak("Can't chdir to %s",cddir);
2213 uid = (int)getuid();
2214 euid = (int)geteuid();
2215 gid = (int)getgid();
2216 egid = (int)getegid();
2221 tainting |= (uid && (euid != uid || egid != gid));
2225 forbid_setid(char *s)
2228 croak("No %s allowed while running setuid", s);
2230 croak("No %s allowed while running setgid", s);
2237 curstash = debstash;
2238 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2240 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2241 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2242 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2243 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2244 sv_setiv(DBsingle, 0);
2245 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2246 sv_setiv(DBtrace, 0);
2247 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2248 sv_setiv(DBsignal, 0);
2249 curstash = defstash;
2252 #ifndef STRESS_REALLOC
2253 #define REASONABLE(size) (size)
2255 #define REASONABLE(size) (1) /* unreasonable */
2259 init_stacks(ARGSproto)
2261 /* start with 128-item stack and 8K cxstack */
2262 curstackinfo = new_stackinfo(REASONABLE(128),
2263 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
2264 curstackinfo->si_type = SI_MAIN;
2265 curstack = curstackinfo->si_stack;
2266 mainstack = curstack; /* remember in case we switch stacks */
2268 stack_base = AvARRAY(curstack);
2269 stack_sp = stack_base;
2270 stack_max = stack_base + AvMAX(curstack);
2272 New(50,tmps_stack,REASONABLE(128),SV*);
2275 tmps_max = REASONABLE(128);
2278 * The following stacks almost certainly should be per-interpreter,
2279 * but for now they're not. XXX
2283 markstack_ptr = markstack;
2285 New(54,markstack,REASONABLE(32),I32);
2286 markstack_ptr = markstack;
2287 markstack_max = markstack + REASONABLE(32);
2295 New(54,scopestack,REASONABLE(32),I32);
2297 scopestack_max = REASONABLE(32);
2303 New(54,savestack,REASONABLE(128),ANY);
2305 savestack_max = REASONABLE(128);
2311 New(54,retstack,REASONABLE(16),OP*);
2313 retstack_max = REASONABLE(16);
2323 while (curstackinfo->si_next)
2324 curstackinfo = curstackinfo->si_next;
2325 while (curstackinfo) {
2326 PERL_SI *p = curstackinfo->si_prev;
2327 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
2328 Safefree(curstackinfo->si_cxstack);
2329 Safefree(curstackinfo);
2332 Safefree(tmps_stack);
2339 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2348 subname = newSVpv("main",4);
2352 init_predump_symbols(void)
2358 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2359 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2360 GvMULTI_on(stdingv);
2361 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2362 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2364 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2366 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2368 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2370 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2372 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2374 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2375 GvMULTI_on(othergv);
2376 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2377 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2379 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2381 statname = NEWSV(66,0); /* last filename we did stat on */
2384 osname = savepv(OSNAME);
2388 init_postdump_symbols(register int argc, register char **argv, register char **env)
2395 argc--,argv++; /* skip name of script */
2397 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2400 if (argv[0][1] == '-') {
2404 if (s = strchr(argv[0], '=')) {
2406 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2409 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2412 toptarget = NEWSV(0,0);
2413 sv_upgrade(toptarget, SVt_PVFM);
2414 sv_setpvn(toptarget, "", 0);
2415 bodytarget = NEWSV(0,0);
2416 sv_upgrade(bodytarget, SVt_PVFM);
2417 sv_setpvn(bodytarget, "", 0);
2418 formtarget = bodytarget;
2421 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2422 sv_setpv(GvSV(tmpgv),origfilename);
2423 magicname("0", "0", 1);
2425 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2426 sv_setpv(GvSV(tmpgv),origargv[0]);
2427 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2429 (void)gv_AVadd(argvgv);
2430 av_clear(GvAVn(argvgv));
2431 for (; argc > 0; argc--,argv++) {
2432 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2435 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2439 hv_magic(hv, envgv, 'E');
2440 #ifndef VMS /* VMS doesn't have environ array */
2441 /* Note that if the supplied env parameter is actually a copy
2442 of the global environ then it may now point to free'd memory
2443 if the environment has been modified since. To avoid this
2444 problem we treat env==NULL as meaning 'use the default'
2449 environ[0] = Nullch;
2450 for (; *env; env++) {
2451 if (!(s = strchr(*env,'=')))
2454 #if defined(WIN32) || defined(MSDOS)
2457 sv = newSVpv(s--,0);
2458 (void)hv_store(hv, *env, s - *env, sv, 0);
2460 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2461 /* Sins of the RTL. See note in my_setenv(). */
2462 (void)PerlEnv_putenv(savepv(*env));
2466 #ifdef DYNAMIC_ENV_FETCH
2467 HvNAME(hv) = savepv(ENV_HV_NAME);
2471 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2472 sv_setiv(GvSV(tmpgv), (IV)getpid());
2481 s = PerlEnv_getenv("PERL5LIB");
2485 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2487 /* Treat PERL5?LIB as a possible search list logical name -- the
2488 * "natural" VMS idiom for a Unix path string. We allow each
2489 * element to be a set of |-separated directories for compatibility.
2493 if (my_trnlnm("PERL5LIB",buf,0))
2494 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2496 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2500 /* Use the ~-expanded versions of APPLLIB (undocumented),
2501 ARCHLIB PRIVLIB SITEARCH and SITELIB
2504 incpush(APPLLIB_EXP, TRUE);
2508 incpush(ARCHLIB_EXP, FALSE);
2511 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2513 incpush(PRIVLIB_EXP, FALSE);
2516 incpush(SITEARCH_EXP, FALSE);
2519 incpush(SITELIB_EXP, FALSE);
2522 incpush(".", FALSE);
2526 # define PERLLIB_SEP ';'
2529 # define PERLLIB_SEP '|'
2531 # define PERLLIB_SEP ':'
2534 #ifndef PERLLIB_MANGLE
2535 # define PERLLIB_MANGLE(s,n) (s)
2539 incpush(char *p, int addsubdirs)
2541 SV *subdir = Nullsv;
2542 static char *archpat_auto;
2548 subdir = NEWSV(55,0);
2549 if (!archpat_auto) {
2550 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2551 + sizeof("//auto"));
2552 New(55, archpat_auto, len, char);
2553 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2555 for (len = sizeof(ARCHNAME) + 2;
2556 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2557 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2562 /* Break at all separators */
2564 SV *libdir = NEWSV(55,0);
2567 /* skip any consecutive separators */
2568 while ( *p == PERLLIB_SEP ) {
2569 /* Uncomment the next line for PATH semantics */
2570 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2574 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2575 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2580 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2581 p = Nullch; /* break out */
2585 * BEFORE pushing libdir onto @INC we may first push version- and
2586 * archname-specific sub-directories.
2589 struct stat tmpstatbuf;
2594 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2596 while (unix[len-1] == '/') len--; /* Cosmetic */
2597 sv_usepvn(libdir,unix,len);
2600 PerlIO_printf(PerlIO_stderr(),
2601 "Failed to unixify @INC element \"%s\"\n",
2604 /* .../archname/version if -d .../archname/version/auto */
2605 sv_setsv(subdir, libdir);
2606 sv_catpv(subdir, archpat_auto);
2607 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2608 S_ISDIR(tmpstatbuf.st_mode))
2609 av_push(GvAVn(incgv),
2610 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2612 /* .../archname if -d .../archname/auto */
2613 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2614 strlen(patchlevel) + 1, "", 0);
2615 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2616 S_ISDIR(tmpstatbuf.st_mode))
2617 av_push(GvAVn(incgv),
2618 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2621 /* finally push this lib directory on the end of @INC */
2622 av_push(GvAVn(incgv), libdir);
2625 SvREFCNT_dec(subdir);
2629 static struct perl_thread *
2632 struct perl_thread *thr;
2635 Newz(53, thr, 1, struct perl_thread);
2636 curcop = &compiling;
2637 thr->cvcache = newHV();
2638 thr->threadsv = newAV();
2639 /* thr->threadsvp is set when find_threadsv is called */
2640 thr->specific = newAV();
2641 thr->errhv = newHV();
2642 thr->flags = THRf_R_JOINABLE;
2643 MUTEX_INIT(&thr->mutex);
2644 /* Handcraft thrsv similarly to mess_sv */
2645 New(53, thrsv, 1, SV);
2646 Newz(53, xpv, 1, XPV);
2647 SvFLAGS(thrsv) = SVt_PV;
2648 SvANY(thrsv) = (void*)xpv;
2649 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2650 SvPVX(thrsv) = (char*)thr;
2651 SvCUR_set(thrsv, sizeof(thr));
2652 SvLEN_set(thrsv, sizeof(thr));
2653 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2657 MUTEX_LOCK(&threads_mutex);
2662 MUTEX_UNLOCK(&threads_mutex);
2664 #ifdef HAVE_THREAD_INTERN
2665 init_thread_intern(thr);
2668 #ifdef SET_THREAD_SELF
2669 SET_THREAD_SELF(thr);
2671 thr->self = pthread_self();
2672 #endif /* SET_THREAD_SELF */
2676 * These must come after the SET_THR because sv_setpvn does
2677 * SvTAINT and the taint fields require dTHR.
2679 toptarget = NEWSV(0,0);
2680 sv_upgrade(toptarget, SVt_PVFM);
2681 sv_setpvn(toptarget, "", 0);
2682 bodytarget = NEWSV(0,0);
2683 sv_upgrade(bodytarget, SVt_PVFM);
2684 sv_setpvn(bodytarget, "", 0);
2685 formtarget = bodytarget;
2686 thr->errsv = newSVpv("", 0);
2687 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2690 #endif /* USE_THREADS */
2693 call_list(I32 oldscope, AV *list)
2696 line_t oldline = curcop->cop_line;
2701 while (AvFILL(list) >= 0) {
2702 CV *cv = (CV*)av_shift(list);
2711 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2712 (void)SvPV(atsv, len);
2715 curcop = &compiling;
2716 curcop->cop_line = oldline;
2717 if (list == beginav)
2718 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2720 sv_catpv(atsv, "END failed--cleanup aborted");
2721 while (scopestack_ix > oldscope)
2723 croak("%s", SvPVX(atsv));
2731 /* my_exit() was called */
2732 while (scopestack_ix > oldscope)
2735 curstash = defstash;
2737 call_list(oldscope, endav);
2739 curcop = &compiling;
2740 curcop->cop_line = oldline;
2742 if (list == beginav)
2743 croak("BEGIN failed--compilation aborted");
2745 croak("END failed--cleanup aborted");
2751 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2756 curcop = &compiling;
2757 curcop->cop_line = oldline;
2770 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2771 thr, (unsigned long) status));
2772 #endif /* USE_THREADS */
2781 STATUS_NATIVE_SET(status);
2788 my_failure_exit(void)
2791 if (vaxc$errno & 1) {
2792 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2793 STATUS_NATIVE_SET(44);
2796 if (!vaxc$errno && errno) /* unlikely */
2797 STATUS_NATIVE_SET(44);
2799 STATUS_NATIVE_SET(vaxc$errno);
2804 STATUS_POSIX_SET(errno);
2806 exitstatus = STATUS_POSIX >> 8;
2807 if (exitstatus & 255)
2808 STATUS_POSIX_SET(exitstatus);
2810 STATUS_POSIX_SET(255);
2820 register PERL_CONTEXT *cx;
2829 (void)UNLINK(e_tmpname);
2830 Safefree(e_tmpname);
2834 POPSTACK_TO(mainstack);
2835 if (cxstack_ix >= 0) {