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();
940 /* init_postdump_symbols not currently designed to be called */
941 /* more than once (ENV isn't cleared first, for example) */
942 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
944 init_postdump_symbols(argc,argv,env);
948 /* now parse the script */
950 SETERRNO(0,SS$_NORMAL);
952 if (yyparse() || error_count) {
954 croak("%s had compilation errors.\n", origfilename);
956 croak("Execution of %s aborted due to compilation errors.\n",
960 curcop->cop_line = 0;
964 (void)UNLINK(e_tmpname);
970 /* now that script is parsed, we can modify record separator */
972 rs = SvREFCNT_inc(nrs);
973 sv_setsv(perl_get_sv("/", TRUE), rs);
984 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
985 dump_mstats("after compilation:");
995 perl_run(PerlInterpreter *sv_interp)
1002 if (!(curinterp = sv_interp))
1005 oldscope = scopestack_ix;
1010 cxstack_ix = -1; /* start context stack again */
1013 /* my_exit() was called */
1014 while (scopestack_ix > oldscope)
1017 curstash = defstash;
1019 call_list(oldscope, endav);
1021 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1022 dump_mstats("after execution: ");
1025 return STATUS_NATIVE_EXPORT;
1028 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1033 POPSTACK_TO(mainstack);
1037 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1038 sawampersand ? "Enabling" : "Omitting"));
1041 DEBUG_x(dump_all());
1042 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1044 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1045 (unsigned long) thr));
1046 #endif /* USE_THREADS */
1049 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1052 if (PERLDB_SINGLE && DBsingle)
1053 sv_setiv(DBsingle, 1);
1055 call_list(oldscope, initav);
1065 else if (main_start) {
1066 CvDEPTH(main_cv) = 1;
1077 perl_get_sv(char *name, I32 create)
1081 if (name[1] == '\0' && !isALPHA(name[0])) {
1082 PADOFFSET tmp = find_threadsv(name);
1083 if (tmp != NOT_IN_PAD) {
1085 return THREADSV(tmp);
1088 #endif /* USE_THREADS */
1089 gv = gv_fetchpv(name, create, SVt_PV);
1096 perl_get_av(char *name, I32 create)
1098 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1107 perl_get_hv(char *name, I32 create)
1109 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1118 perl_get_cv(char *name, I32 create)
1120 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1121 if (create && !GvCVu(gv))
1122 return newSUB(start_subparse(FALSE, 0),
1123 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1131 /* Be sure to refetch the stack pointer after calling these routines. */
1134 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1136 /* See G_* flags in cop.h */
1137 /* null terminated arg list */
1144 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1149 return perl_call_pv(sub_name, flags);
1153 perl_call_pv(char *sub_name, I32 flags)
1154 /* name of the subroutine */
1155 /* See G_* flags in cop.h */
1157 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1161 perl_call_method(char *methname, I32 flags)
1162 /* name of the subroutine */
1163 /* See G_* flags in cop.h */
1169 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1174 return perl_call_sv(*stack_sp--, flags);
1177 /* May be called with any of a CV, a GV, or an SV containing the name. */
1179 perl_call_sv(SV *sv, I32 flags)
1181 /* See G_* flags in cop.h */
1184 LOGOP myop; /* fake syntax tree node */
1189 bool oldcatch = CATCH_GET;
1194 if (flags & G_DISCARD) {
1199 Zero(&myop, 1, LOGOP);
1200 myop.op_next = Nullop;
1201 if (!(flags & G_NOARGS))
1202 myop.op_flags |= OPf_STACKED;
1203 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1204 (flags & G_ARRAY) ? OPf_WANT_LIST :
1209 EXTEND(stack_sp, 1);
1212 oldscope = scopestack_ix;
1214 if (PERLDB_SUB && curstash != debstash
1215 /* Handle first BEGIN of -d. */
1216 && (DBcv || (DBcv = GvCV(DBsub)))
1217 /* Try harder, since this may have been a sighandler, thus
1218 * curstash may be meaningless. */
1219 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash)
1220 && !(flags & G_NODEBUG))
1221 op->op_private |= OPpENTERSUB_DB;
1223 if (flags & G_EVAL) {
1224 cLOGOP->op_other = op;
1226 /* we're trying to emulate pp_entertry() here */
1228 register PERL_CONTEXT *cx;
1229 I32 gimme = GIMME_V;
1234 push_return(op->op_next);
1235 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1237 eval_root = op; /* Only needed so that goto works right. */
1240 if (flags & G_KEEPERR)
1255 /* my_exit() was called */
1256 curstash = defstash;
1260 croak("Callback called exit");
1269 stack_sp = stack_base + oldmark;
1270 if (flags & G_ARRAY)
1274 *++stack_sp = &sv_undef;
1282 if (op == (OP*)&myop)
1283 op = pp_entersub(ARGS);
1286 retval = stack_sp - (stack_base + oldmark);
1287 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1291 if (flags & G_EVAL) {
1292 if (scopestack_ix > oldscope) {
1296 register PERL_CONTEXT *cx;
1308 CATCH_SET(oldcatch);
1310 if (flags & G_DISCARD) {
1311 stack_sp = stack_base + oldmark;
1320 /* Eval a string. The G_EVAL flag is always assumed. */
1323 perl_eval_sv(SV *sv, I32 flags)
1325 /* See G_* flags in cop.h */
1328 UNOP myop; /* fake syntax tree node */
1329 I32 oldmark = SP - stack_base;
1336 if (flags & G_DISCARD) {
1344 EXTEND(stack_sp, 1);
1346 oldscope = scopestack_ix;
1348 if (!(flags & G_NOARGS))
1349 myop.op_flags = OPf_STACKED;
1350 myop.op_next = Nullop;
1351 myop.op_type = OP_ENTEREVAL;
1352 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1353 (flags & G_ARRAY) ? OPf_WANT_LIST :
1355 if (flags & G_KEEPERR)
1356 myop.op_flags |= OPf_SPECIAL;
1366 /* my_exit() was called */
1367 curstash = defstash;
1371 croak("Callback called exit");
1380 stack_sp = stack_base + oldmark;
1381 if (flags & G_ARRAY)
1385 *++stack_sp = &sv_undef;
1390 if (op == (OP*)&myop)
1391 op = pp_entereval(ARGS);
1394 retval = stack_sp - (stack_base + oldmark);
1395 if (!(flags & G_KEEPERR))
1400 if (flags & G_DISCARD) {
1401 stack_sp = stack_base + oldmark;
1411 perl_eval_pv(char *p, I32 croak_on_error)
1414 SV* sv = newSVpv(p, 0);
1417 perl_eval_sv(sv, G_SCALAR);
1424 if (croak_on_error && SvTRUE(ERRSV))
1425 croak(SvPVx(ERRSV, na));
1430 /* Require a module. */
1433 perl_require_pv(char *pv)
1435 SV* sv = sv_newmortal();
1436 sv_setpv(sv, "require '");
1439 perl_eval_sv(sv, G_DISCARD);
1443 magicname(char *sym, char *name, I32 namlen)
1447 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1448 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1452 usage(char *name) /* XXX move this out into a module ? */
1455 /* This message really ought to be max 23 lines.
1456 * Removed -h because the user already knows that opton. Others? */
1458 static char *usage[] = {
1459 "-0[octal] specify record separator (\\0, if no argument)",
1460 "-a autosplit mode with -n or -p (splits $_ into @F)",
1461 "-c check syntax only (runs BEGIN and END blocks)",
1462 "-d[:debugger] run scripts under debugger",
1463 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1464 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1465 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1466 "-i[extension] edit <> files in place (make backup if extension supplied)",
1467 "-Idirectory specify @INC/#include directory (may be used more than once)",
1468 "-l[octal] enable line ending processing, specifies line terminator",
1469 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1470 "-n assume 'while (<>) { ... }' loop around your script",
1471 "-p assume loop like -n but print line also like sed",
1472 "-P run script through C preprocessor before compilation",
1473 "-s enable some switch parsing for switches after script name",
1474 "-S look for the script using PATH environment variable",
1475 "-T turn on tainting checks",
1476 "-u dump core after parsing script",
1477 "-U allow unsafe operations",
1478 "-v print version number, patchlevel plus VERY IMPORTANT perl info",
1479 "-V[:variable] print perl configuration information",
1480 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1481 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1487 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1489 printf("\n %s", *p++);
1492 /* This routine handles any switches that can be given during run */
1495 moreswitches(char *s)
1504 rschar = scan_oct(s, 4, &numlen);
1506 if (rschar & ~((U8)~0))
1508 else if (!rschar && numlen >= 2)
1509 nrs = newSVpv("", 0);
1512 nrs = newSVpv(&ch, 1);
1518 splitstr = savepv(s + 1);
1532 if (*s == ':' || *s == '=') {
1533 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1537 perldb = PERLDB_ALL;
1544 if (isALPHA(s[1])) {
1545 static char debopts[] = "psltocPmfrxuLHXD";
1548 for (s++; *s && (d = strchr(debopts,*s)); s++)
1549 debug |= 1 << (d - debopts);
1553 for (s++; isDIGIT(*s); s++) ;
1555 debug |= 0x80000000;
1557 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1558 for (s++; isALNUM(*s); s++) ;
1568 inplace = savepv(s+1);
1570 for (s = inplace; *s && !isSPACE(*s); s++) ;
1573 if (*s == '-') /* Additional switches on #! line. */
1577 case 'I': /* -I handled both here and in parse_perl() */
1580 while (*s && isSPACE(*s))
1584 for (e = s; *e && !isSPACE(*e); e++) ;
1585 p = savepvn(s, e-s);
1591 croak("No space allowed after -I");
1601 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1611 ors = SvPV(nrs, orslen);
1612 ors = savepvn(ors, orslen);
1616 forbid_setid("-M"); /* XXX ? */
1619 forbid_setid("-m"); /* XXX ? */
1624 /* -M-foo == 'no foo' */
1625 if (*s == '-') { use = "no "; ++s; }
1626 sv = newSVpv(use,0);
1628 /* We allow -M'Module qw(Foo Bar)' */
1629 while(isALNUM(*s) || *s==':') ++s;
1631 sv_catpv(sv, start);
1632 if (*(start-1) == 'm') {
1634 croak("Can't use '%c' after -mname", *s);
1635 sv_catpv( sv, " ()");
1638 sv_catpvn(sv, start, s-start);
1639 sv_catpv(sv, " split(/,/,q{");
1644 if (preambleav == NULL)
1645 preambleav = newAV();
1646 av_push(preambleav, sv);
1649 croak("No space allowed after -%c", *(s-1));
1666 croak("Too late for \"-T\" option");
1678 #if defined(SUBVERSION) && SUBVERSION > 0
1679 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1680 PATCHLEVEL, SUBVERSION, ARCHNAME);
1682 printf("\nThis is perl, version %s built for %s",
1683 patchlevel, ARCHNAME);
1685 #if defined(LOCAL_PATCH_COUNT)
1686 if (LOCAL_PATCH_COUNT > 0)
1687 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1688 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1691 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1693 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1696 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1697 printf("djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1998\n");
1700 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1701 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1704 printf("atariST series port, ++jrb bammi@cadence.com\n");
1707 Perl may be copied only under the terms of either the Artistic License or the\n\
1708 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\
1709 Complete documentation for Perl, including FAQ lists, should be found on\n\
1710 this system using `man perl' or `perldoc perl'. If you have access to the\n\
1711 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
1719 if (s[1] == '-') /* Additional switches on #! line. */
1730 #ifdef ALTERNATE_SHEBANG
1731 case 'S': /* OS/2 needs -S on "extproc" line. */
1739 croak("Can't emulate -%.1s on #! line",s);
1744 /* compliments of Tom Christiansen */
1746 /* unexec() can be found in the Gnu emacs distribution */
1747 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
1758 prog = newSVpv(BIN_EXP, 0);
1759 sv_catpv(prog, "/perl");
1760 file = newSVpv(origfilename, 0);
1761 sv_catpv(file, ".perldump");
1763 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1764 /* unexec prints msg to stderr in case of failure */
1765 PerlProc_exit(status);
1768 # include <lib$routines.h>
1769 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1771 ABORT(); /* for use with undump */
1777 init_main_stash(void)
1782 /* Note that strtab is a rather special HV. Assumptions are made
1783 about not iterating on it, and not adding tie magic to it.
1784 It is properly deallocated in perl_destruct() */
1786 HvSHAREKEYS_off(strtab); /* mandatory */
1787 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1788 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1790 curstash = defstash = newHV();
1791 curstname = newSVpv("main",4);
1792 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1793 SvREFCNT_dec(GvHV(gv));
1794 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1796 HvNAME(defstash) = savepv("main");
1797 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1799 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1800 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1802 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1803 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1804 sv_setpvn(ERRSV, "", 0);
1805 curstash = defstash;
1806 compiling.cop_stash = defstash;
1807 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1808 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1809 /* We must init $/ before switches are processed. */
1810 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1814 open_script(char *scriptname, bool dosearch, SV *sv)
1819 scriptname = find_script(scriptname, dosearch, NULL, 0);
1821 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1822 char *s = scriptname + 8;
1831 origfilename = savepv(e_tmpname ? "-e" : scriptname);
1832 curcop->cop_filegv = gv_fetchfile(origfilename);
1833 if (strEQ(origfilename,"-"))
1835 if (fdscript >= 0) {
1836 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
1837 #if defined(HAS_FCNTL) && defined(F_SETFD)
1839 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1842 else if (preprocess) {
1843 char *cpp_cfg = CPPSTDIN;
1844 SV *cpp = NEWSV(0,0);
1845 SV *cmd = NEWSV(0,0);
1847 if (strEQ(cpp_cfg, "cppstdin"))
1848 sv_catpvf(cpp, "%s/", BIN_EXP);
1849 sv_catpv(cpp, cpp_cfg);
1852 sv_catpv(sv,PRIVLIB_EXP);
1856 sed %s -e \"/^[^#]/b\" \
1857 -e \"/^#[ ]*include[ ]/b\" \
1858 -e \"/^#[ ]*define[ ]/b\" \
1859 -e \"/^#[ ]*if[ ]/b\" \
1860 -e \"/^#[ ]*ifdef[ ]/b\" \
1861 -e \"/^#[ ]*ifndef[ ]/b\" \
1862 -e \"/^#[ ]*else/b\" \
1863 -e \"/^#[ ]*elif[ ]/b\" \
1864 -e \"/^#[ ]*undef[ ]/b\" \
1865 -e \"/^#[ ]*endif/b\" \
1868 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1871 %s %s -e '/^[^#]/b' \
1872 -e '/^#[ ]*include[ ]/b' \
1873 -e '/^#[ ]*define[ ]/b' \
1874 -e '/^#[ ]*if[ ]/b' \
1875 -e '/^#[ ]*ifdef[ ]/b' \
1876 -e '/^#[ ]*ifndef[ ]/b' \
1877 -e '/^#[ ]*else/b' \
1878 -e '/^#[ ]*elif[ ]/b' \
1879 -e '/^#[ ]*undef[ ]/b' \
1880 -e '/^#[ ]*endif/b' \
1888 (doextract ? "-e '1,/^#/d\n'" : ""),
1890 scriptname, cpp, sv, CPPMINUS);
1892 #ifdef IAMSUID /* actually, this is caught earlier */
1893 if (euid != uid && !euid) { /* if running suidperl */
1895 (void)seteuid(uid); /* musn't stay setuid root */
1898 (void)setreuid((Uid_t)-1, uid);
1900 #ifdef HAS_SETRESUID
1901 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
1907 if (geteuid() != uid)
1908 croak("Can't do seteuid!\n");
1910 #endif /* IAMSUID */
1911 rsfp = PerlProc_popen(SvPVX(cmd), "r");
1915 else if (!*scriptname) {
1916 forbid_setid("program input from stdin");
1917 rsfp = PerlIO_stdin();
1920 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1921 #if defined(HAS_FCNTL) && defined(F_SETFD)
1923 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1931 #ifndef IAMSUID /* in case script is not readable before setuid */
1932 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
1933 statbuf.st_mode & (S_ISUID|S_ISGID)) {
1935 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
1936 croak("Can't do setuid\n");
1940 croak("Can't open perl script \"%s\": %s\n",
1941 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
1946 validate_suid(char *validarg, char *scriptname)
1950 /* do we need to emulate setuid on scripts? */
1952 /* This code is for those BSD systems that have setuid #! scripts disabled
1953 * in the kernel because of a security problem. Merely defining DOSUID
1954 * in perl will not fix that problem, but if you have disabled setuid
1955 * scripts in the kernel, this will attempt to emulate setuid and setgid
1956 * on scripts that have those now-otherwise-useless bits set. The setuid
1957 * root version must be called suidperl or sperlN.NNN. If regular perl
1958 * discovers that it has opened a setuid script, it calls suidperl with
1959 * the same argv that it had. If suidperl finds that the script it has
1960 * just opened is NOT setuid root, it sets the effective uid back to the
1961 * uid. We don't just make perl setuid root because that loses the
1962 * effective uid we had before invoking perl, if it was different from the
1965 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
1966 * be defined in suidperl only. suidperl must be setuid root. The
1967 * Configure script will set this up for you if you want it.
1974 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
1975 croak("Can't stat script \"%s\"",origfilename);
1976 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
1980 #ifndef HAS_SETREUID
1981 /* On this access check to make sure the directories are readable,
1982 * there is actually a small window that the user could use to make
1983 * filename point to an accessible directory. So there is a faint
1984 * chance that someone could execute a setuid script down in a
1985 * non-accessible directory. I don't know what to do about that.
1986 * But I don't think it's too important. The manual lies when
1987 * it says access() is useful in setuid programs.
1989 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
1990 croak("Permission denied");
1992 /* If we can swap euid and uid, then we can determine access rights
1993 * with a simple stat of the file, and then compare device and
1994 * inode to make sure we did stat() on the same file we opened.
1995 * Then we just have to make sure he or she can execute it.
1998 struct stat tmpstatbuf;
2002 setreuid(euid,uid) < 0
2005 setresuid(euid,uid,(Uid_t)-1) < 0
2008 || getuid() != euid || geteuid() != uid)
2009 croak("Can't swap uid and euid"); /* really paranoid */
2010 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2011 croak("Permission denied"); /* testing full pathname here */
2012 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2013 tmpstatbuf.st_ino != statbuf.st_ino) {
2014 (void)PerlIO_close(rsfp);
2015 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2017 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2018 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2019 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2020 (long)statbuf.st_dev, (long)statbuf.st_ino,
2021 SvPVX(GvSV(curcop->cop_filegv)),
2022 (long)statbuf.st_uid, (long)statbuf.st_gid);
2023 (void)PerlProc_pclose(rsfp);
2025 croak("Permission denied\n");
2029 setreuid(uid,euid) < 0
2031 # if defined(HAS_SETRESUID)
2032 setresuid(uid,euid,(Uid_t)-1) < 0
2035 || getuid() != uid || geteuid() != euid)
2036 croak("Can't reswap uid and euid");
2037 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2038 croak("Permission denied\n");
2040 #endif /* HAS_SETREUID */
2041 #endif /* IAMSUID */
2043 if (!S_ISREG(statbuf.st_mode))
2044 croak("Permission denied");
2045 if (statbuf.st_mode & S_IWOTH)
2046 croak("Setuid/gid script is writable by world");
2047 doswitches = FALSE; /* -s is insecure in suid */
2049 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2050 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2051 croak("No #! line");
2052 s = SvPV(linestr,na)+2;
2054 while (!isSPACE(*s)) s++;
2055 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2056 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2057 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2058 croak("Not a perl script");
2059 while (*s == ' ' || *s == '\t') s++;
2061 * #! arg must be what we saw above. They can invoke it by
2062 * mentioning suidperl explicitly, but they may not add any strange
2063 * arguments beyond what #! says if they do invoke suidperl that way.
2065 len = strlen(validarg);
2066 if (strEQ(validarg," PHOOEY ") ||
2067 strnNE(s,validarg,len) || !isSPACE(s[len]))
2068 croak("Args must match #! line");
2071 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2072 euid == statbuf.st_uid)
2074 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2075 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2076 #endif /* IAMSUID */
2078 if (euid) { /* oops, we're not the setuid root perl */
2079 (void)PerlIO_close(rsfp);
2082 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2084 croak("Can't do setuid\n");
2087 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2089 (void)setegid(statbuf.st_gid);
2092 (void)setregid((Gid_t)-1,statbuf.st_gid);
2094 #ifdef HAS_SETRESGID
2095 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2097 setgid(statbuf.st_gid);
2101 if (getegid() != statbuf.st_gid)
2102 croak("Can't do setegid!\n");
2104 if (statbuf.st_mode & S_ISUID) {
2105 if (statbuf.st_uid != euid)
2107 (void)seteuid(statbuf.st_uid); /* all that for this */
2110 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2112 #ifdef HAS_SETRESUID
2113 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2115 setuid(statbuf.st_uid);
2119 if (geteuid() != statbuf.st_uid)
2120 croak("Can't do seteuid!\n");
2122 else if (uid) { /* oops, mustn't run as root */
2124 (void)seteuid((Uid_t)uid);
2127 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2129 #ifdef HAS_SETRESUID
2130 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2136 if (geteuid() != uid)
2137 croak("Can't do seteuid!\n");
2140 if (!cando(S_IXUSR,TRUE,&statbuf))
2141 croak("Permission denied\n"); /* they can't do this */
2144 else if (preprocess)
2145 croak("-P not allowed for setuid/setgid script\n");
2146 else if (fdscript >= 0)
2147 croak("fd script not allowed in suidperl\n");
2149 croak("Script is not setuid/setgid in suidperl\n");
2151 /* We absolutely must clear out any saved ids here, so we */
2152 /* exec the real perl, substituting fd script for scriptname. */
2153 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2154 PerlIO_rewind(rsfp);
2155 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2156 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2157 if (!origargv[which])
2158 croak("Permission denied");
2159 origargv[which] = savepv(form("/dev/fd/%d/%s",
2160 PerlIO_fileno(rsfp), origargv[which]));
2161 #if defined(HAS_FCNTL) && defined(F_SETFD)
2162 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2164 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2165 croak("Can't do setuid\n");
2166 #endif /* IAMSUID */
2168 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2169 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2171 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2172 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2174 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2177 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2178 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2179 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2180 /* not set-id, must be wrapped */
2186 find_beginning(void)
2188 register char *s, *s2;
2190 /* skip forward in input to the real script? */
2194 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2195 croak("No Perl script found in input\n");
2196 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2197 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2199 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2201 while (*s == ' ' || *s == '\t') s++;
2203 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2204 if (strnEQ(s2-4,"perl",4))
2206 while (s = moreswitches(s)) ;
2208 if (cddir && PerlDir_chdir(cddir) < 0)
2209 croak("Can't chdir to %s",cddir);
2217 uid = (int)getuid();
2218 euid = (int)geteuid();
2219 gid = (int)getgid();
2220 egid = (int)getegid();
2225 tainting |= (uid && (euid != uid || egid != gid));
2229 forbid_setid(char *s)
2232 croak("No %s allowed while running setuid", s);
2234 croak("No %s allowed while running setgid", s);
2241 curstash = debstash;
2242 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2244 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2245 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2246 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2247 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2248 sv_setiv(DBsingle, 0);
2249 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2250 sv_setiv(DBtrace, 0);
2251 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2252 sv_setiv(DBsignal, 0);
2253 curstash = defstash;
2256 #ifndef STRESS_REALLOC
2257 #define REASONABLE(size) (size)
2259 #define REASONABLE(size) (1) /* unreasonable */
2263 init_stacks(ARGSproto)
2265 /* start with 128-item stack and 8K cxstack */
2266 curstackinfo = new_stackinfo(REASONABLE(128),
2267 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
2268 curstackinfo->si_type = SI_MAIN;
2269 curstack = curstackinfo->si_stack;
2270 mainstack = curstack; /* remember in case we switch stacks */
2272 stack_base = AvARRAY(curstack);
2273 stack_sp = stack_base;
2274 stack_max = stack_base + AvMAX(curstack);
2276 New(50,tmps_stack,REASONABLE(128),SV*);
2279 tmps_max = REASONABLE(128);
2282 * The following stacks almost certainly should be per-interpreter,
2283 * but for now they're not. XXX
2287 markstack_ptr = markstack;
2289 New(54,markstack,REASONABLE(32),I32);
2290 markstack_ptr = markstack;
2291 markstack_max = markstack + REASONABLE(32);
2299 New(54,scopestack,REASONABLE(32),I32);
2301 scopestack_max = REASONABLE(32);
2307 New(54,savestack,REASONABLE(128),ANY);
2309 savestack_max = REASONABLE(128);
2315 New(54,retstack,REASONABLE(16),OP*);
2317 retstack_max = REASONABLE(16);
2327 while (curstackinfo->si_next)
2328 curstackinfo = curstackinfo->si_next;
2329 while (curstackinfo) {
2330 PERL_SI *p = curstackinfo->si_prev;
2331 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
2332 Safefree(curstackinfo->si_cxstack);
2333 Safefree(curstackinfo);
2336 Safefree(tmps_stack);
2343 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2352 subname = newSVpv("main",4);
2356 init_predump_symbols(void)
2362 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2363 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2364 GvMULTI_on(stdingv);
2365 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2366 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2368 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2370 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2372 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2374 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2376 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2378 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2379 GvMULTI_on(othergv);
2380 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2381 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2383 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2385 statname = NEWSV(66,0); /* last filename we did stat on */
2388 osname = savepv(OSNAME);
2392 init_postdump_symbols(register int argc, register char **argv, register char **env)
2399 argc--,argv++; /* skip name of script */
2401 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2404 if (argv[0][1] == '-') {
2408 if (s = strchr(argv[0], '=')) {
2410 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2413 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2416 toptarget = NEWSV(0,0);
2417 sv_upgrade(toptarget, SVt_PVFM);
2418 sv_setpvn(toptarget, "", 0);
2419 bodytarget = NEWSV(0,0);
2420 sv_upgrade(bodytarget, SVt_PVFM);
2421 sv_setpvn(bodytarget, "", 0);
2422 formtarget = bodytarget;
2425 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2426 sv_setpv(GvSV(tmpgv),origfilename);
2427 magicname("0", "0", 1);
2429 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2430 sv_setpv(GvSV(tmpgv),origargv[0]);
2431 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2433 (void)gv_AVadd(argvgv);
2434 av_clear(GvAVn(argvgv));
2435 for (; argc > 0; argc--,argv++) {
2436 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2439 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2443 hv_magic(hv, envgv, 'E');
2444 #ifndef VMS /* VMS doesn't have environ array */
2445 /* Note that if the supplied env parameter is actually a copy
2446 of the global environ then it may now point to free'd memory
2447 if the environment has been modified since. To avoid this
2448 problem we treat env==NULL as meaning 'use the default'
2453 environ[0] = Nullch;
2454 for (; *env; env++) {
2455 if (!(s = strchr(*env,'=')))
2458 #if defined(WIN32) || defined(MSDOS)
2461 sv = newSVpv(s--,0);
2462 (void)hv_store(hv, *env, s - *env, sv, 0);
2464 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2465 /* Sins of the RTL. See note in my_setenv(). */
2466 (void)PerlEnv_putenv(savepv(*env));
2470 #ifdef DYNAMIC_ENV_FETCH
2471 HvNAME(hv) = savepv(ENV_HV_NAME);
2475 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2476 sv_setiv(GvSV(tmpgv), (IV)getpid());
2485 s = PerlEnv_getenv("PERL5LIB");
2489 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2491 /* Treat PERL5?LIB as a possible search list logical name -- the
2492 * "natural" VMS idiom for a Unix path string. We allow each
2493 * element to be a set of |-separated directories for compatibility.
2497 if (my_trnlnm("PERL5LIB",buf,0))
2498 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2500 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2504 /* Use the ~-expanded versions of APPLLIB (undocumented),
2505 ARCHLIB PRIVLIB SITEARCH and SITELIB
2508 incpush(APPLLIB_EXP, TRUE);
2512 incpush(ARCHLIB_EXP, FALSE);
2515 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2517 incpush(PRIVLIB_EXP, FALSE);
2520 incpush(SITEARCH_EXP, FALSE);
2523 incpush(SITELIB_EXP, FALSE);
2526 incpush(".", FALSE);
2530 # define PERLLIB_SEP ';'
2533 # define PERLLIB_SEP '|'
2535 # define PERLLIB_SEP ':'
2538 #ifndef PERLLIB_MANGLE
2539 # define PERLLIB_MANGLE(s,n) (s)
2543 incpush(char *p, int addsubdirs)
2545 SV *subdir = Nullsv;
2546 static char *archpat_auto;
2552 subdir = NEWSV(55,0);
2553 if (!archpat_auto) {
2554 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2555 + sizeof("//auto"));
2556 New(55, archpat_auto, len, char);
2557 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2559 for (len = sizeof(ARCHNAME) + 2;
2560 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2561 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2566 /* Break at all separators */
2568 SV *libdir = NEWSV(55,0);
2571 /* skip any consecutive separators */
2572 while ( *p == PERLLIB_SEP ) {
2573 /* Uncomment the next line for PATH semantics */
2574 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2578 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2579 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2584 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2585 p = Nullch; /* break out */
2589 * BEFORE pushing libdir onto @INC we may first push version- and
2590 * archname-specific sub-directories.
2593 struct stat tmpstatbuf;
2598 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2600 while (unix[len-1] == '/') len--; /* Cosmetic */
2601 sv_usepvn(libdir,unix,len);
2604 PerlIO_printf(PerlIO_stderr(),
2605 "Failed to unixify @INC element \"%s\"\n",
2608 /* .../archname/version if -d .../archname/version/auto */
2609 sv_setsv(subdir, libdir);
2610 sv_catpv(subdir, archpat_auto);
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"));
2616 /* .../archname if -d .../archname/auto */
2617 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2618 strlen(patchlevel) + 1, "", 0);
2619 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2620 S_ISDIR(tmpstatbuf.st_mode))
2621 av_push(GvAVn(incgv),
2622 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2625 /* finally push this lib directory on the end of @INC */
2626 av_push(GvAVn(incgv), libdir);
2629 SvREFCNT_dec(subdir);
2633 static struct perl_thread *
2636 struct perl_thread *thr;
2639 Newz(53, thr, 1, struct perl_thread);
2640 curcop = &compiling;
2641 thr->cvcache = newHV();
2642 thr->threadsv = newAV();
2643 /* thr->threadsvp is set when find_threadsv is called */
2644 thr->specific = newAV();
2645 thr->errhv = newHV();
2646 thr->flags = THRf_R_JOINABLE;
2647 MUTEX_INIT(&thr->mutex);
2648 /* Handcraft thrsv similarly to mess_sv */
2649 New(53, thrsv, 1, SV);
2650 Newz(53, xpv, 1, XPV);
2651 SvFLAGS(thrsv) = SVt_PV;
2652 SvANY(thrsv) = (void*)xpv;
2653 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2654 SvPVX(thrsv) = (char*)thr;
2655 SvCUR_set(thrsv, sizeof(thr));
2656 SvLEN_set(thrsv, sizeof(thr));
2657 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2661 MUTEX_LOCK(&threads_mutex);
2666 MUTEX_UNLOCK(&threads_mutex);
2668 #ifdef HAVE_THREAD_INTERN
2669 init_thread_intern(thr);
2672 #ifdef SET_THREAD_SELF
2673 SET_THREAD_SELF(thr);
2675 thr->self = pthread_self();
2676 #endif /* SET_THREAD_SELF */
2680 * These must come after the SET_THR because sv_setpvn does
2681 * SvTAINT and the taint fields require dTHR.
2683 toptarget = NEWSV(0,0);
2684 sv_upgrade(toptarget, SVt_PVFM);
2685 sv_setpvn(toptarget, "", 0);
2686 bodytarget = NEWSV(0,0);
2687 sv_upgrade(bodytarget, SVt_PVFM);
2688 sv_setpvn(bodytarget, "", 0);
2689 formtarget = bodytarget;
2690 thr->errsv = newSVpv("", 0);
2691 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2694 #endif /* USE_THREADS */
2697 call_list(I32 oldscope, AV *list)
2700 line_t oldline = curcop->cop_line;
2705 while (AvFILL(list) >= 0) {
2706 CV *cv = (CV*)av_shift(list);
2715 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2716 (void)SvPV(atsv, len);
2719 curcop = &compiling;
2720 curcop->cop_line = oldline;
2721 if (list == beginav)
2722 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2724 sv_catpv(atsv, "END failed--cleanup aborted");
2725 while (scopestack_ix > oldscope)
2727 croak("%s", SvPVX(atsv));
2735 /* my_exit() was called */
2736 while (scopestack_ix > oldscope)
2739 curstash = defstash;
2741 call_list(oldscope, endav);
2743 curcop = &compiling;
2744 curcop->cop_line = oldline;
2746 if (list == beginav)
2747 croak("BEGIN failed--compilation aborted");
2749 croak("END failed--cleanup aborted");
2755 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2760 curcop = &compiling;
2761 curcop->cop_line = oldline;
2774 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2775 thr, (unsigned long) status));
2776 #endif /* USE_THREADS */
2785 STATUS_NATIVE_SET(status);
2792 my_failure_exit(void)
2795 if (vaxc$errno & 1) {
2796 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2797 STATUS_NATIVE_SET(44);
2800 if (!vaxc$errno && errno) /* unlikely */
2801 STATUS_NATIVE_SET(44);
2803 STATUS_NATIVE_SET(vaxc$errno);
2808 STATUS_POSIX_SET(errno);
2810 exitstatus = STATUS_POSIX >> 8;
2811 if (exitstatus & 255)
2812 STATUS_POSIX_SET(exitstatus);
2814 STATUS_POSIX_SET(255);
2824 register PERL_CONTEXT *cx;
2833 (void)UNLINK(e_tmpname);
2834 Safefree(e_tmpname);
2838 POPSTACK_TO(mainstack);
2839 if (cxstack_ix >= 0) {