3 * Copyright (c) 1987-1998 Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
16 #include "patchlevel.h"
18 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
23 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
24 char *getenv _((char *)); /* Usually in <stdlib.h> */
34 dEXTCONST char rcsid[] = "perl.c\nPatch level: ###\n";
42 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
49 static I32 read_e_script _((CPerlObj* pPerl, int idx, SV *buf_sv, int maxlen));
51 static void find_beginning _((void));
52 static void forbid_setid _((char *));
53 static void incpush _((char *, int));
54 static void init_interp _((void));
55 static void init_ids _((void));
56 static void init_debugger _((void));
57 static void init_lexer _((void));
58 static void init_main_stash _((void));
60 static struct perl_thread * init_main_thread _((void));
61 #endif /* USE_THREADS */
62 static void init_perllib _((void));
63 static void init_postdump_symbols _((int, char **, char **));
64 static void init_predump_symbols _((void));
65 static void my_exit_jump _((void)) __attribute__((noreturn));
66 static void nuke_stacks _((void));
67 static void open_script _((char *, bool, SV *, int *fd));
68 static void usage _((char *));
69 static void validate_suid _((char *, char*, int));
70 static I32 read_e_script _((int idx, SV *buf_sv, int maxlen));
74 CPerlObj* perl_alloc(IPerlMem* ipM, IPerlEnv* ipE, IPerlStdIO* ipStd,
75 IPerlLIO* ipLIO, IPerlDir* ipD, IPerlSock* ipS, IPerlProc* ipP)
77 CPerlObj* pPerl = new(ipM) CPerlObj(ipM, ipE, ipStd, ipLIO, ipD, ipS, ipP);
87 PerlInterpreter *sv_interp;
90 New(53, sv_interp, 1, PerlInterpreter);
93 #endif /* PERL_OBJECT */
97 CPerlObj::perl_construct(void)
99 perl_construct(register PerlInterpreter *sv_interp)
105 struct perl_thread *thr;
106 #endif /* FAKE_THREADS */
107 #endif /* USE_THREADS */
110 if (!(curinterp = sv_interp))
116 Zero(sv_interp, 1, PerlInterpreter);
119 /* Init the real globals (and main thread)? */
124 #ifdef ALLOC_THREAD_KEY
127 if (pthread_key_create(&thr_key, 0))
128 croak("panic: pthread_key_create");
130 MUTEX_INIT(&sv_mutex);
132 * Safe to use basic SV functions from now on (though
133 * not things like mortals or tainting yet).
135 MUTEX_INIT(&eval_mutex);
136 COND_INIT(&eval_cond);
137 MUTEX_INIT(&threads_mutex);
138 COND_INIT(&nthreads_cond);
139 #ifdef EMULATE_ATOMIC_REFCOUNTS
140 MUTEX_INIT(&svref_mutex);
141 #endif /* EMULATE_ATOMIC_REFCOUNTS */
143 thr = init_main_thread();
144 #endif /* USE_THREADS */
146 linestr = NEWSV(65,79);
147 sv_upgrade(linestr,SVt_PVIV);
149 if (!SvREADONLY(&sv_undef)) {
150 /* set read-only and try to insure than we wont see REFCNT==0
153 SvREADONLY_on(&sv_undef);
154 SvREFCNT(&sv_undef) = (~(U32)0)/2;
158 SvREADONLY_on(&sv_no);
159 SvREFCNT(&sv_no) = (~(U32)0)/2;
161 sv_setpv(&sv_yes,Yes);
163 SvREADONLY_on(&sv_yes);
164 SvREFCNT(&sv_yes) = (~(U32)0)/2;
169 /* sighandlerp = sighandler; */
171 sighandlerp = sighandler;
177 * There is no way we can refer to them from Perl so close them to save
178 * space. The other alternative would be to provide STDAUX and STDPRN
181 (void)fclose(stdaux);
182 (void)fclose(stdprn);
186 nrs = newSVpv("\n", 1);
187 rs = SvREFCNT_inc(nrs);
192 perl_destruct_level = 1;
194 if (perl_destruct_level > 0)
199 lex_state = LEX_NOTPARSING;
201 start_env.je_prev = NULL;
202 start_env.je_ret = -1;
203 start_env.je_mustcatch = TRUE;
204 top_env = &start_env;
207 SET_NUMERIC_STANDARD();
208 #if defined(SUBVERSION) && SUBVERSION > 0
209 sprintf(patchlevel, "%7.5f", (double) 5
210 + ((double) PATCHLEVEL / (double) 1000)
211 + ((double) SUBVERSION / (double) 100000));
213 sprintf(patchlevel, "%5.3f", (double) 5 +
214 ((double) PATCHLEVEL / (double) 1000));
217 #if defined(LOCAL_PATCH_COUNT)
218 localpatches = local_patches; /* For possible -v */
221 PerlIO_init(); /* Hook to IO system */
223 fdpid = newAV(); /* for remembering popen pids by fd */
224 modglobal = newHV(); /* pointers to per-interpreter module globals */
227 New(51,debname,128,char);
228 New(52,debdelim,128,char);
236 CPerlObj::perl_destruct(void)
238 perl_destruct(register PerlInterpreter *sv_interp)
242 int destruct_level; /* 0=none, 1=full, 2=full with checks */
247 #endif /* USE_THREADS */
250 if (!(curinterp = sv_interp))
256 /* Pass 1 on any remaining threads: detach joinables, join zombies */
258 MUTEX_LOCK(&threads_mutex);
259 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
260 "perl_destruct: waiting for %d threads...\n",
262 for (t = thr->next; t != thr; t = t->next) {
263 MUTEX_LOCK(&t->mutex);
264 switch (ThrSTATE(t)) {
267 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
268 "perl_destruct: joining zombie %p\n", t));
269 ThrSETSTATE(t, THRf_DEAD);
270 MUTEX_UNLOCK(&t->mutex);
273 * The SvREFCNT_dec below may take a long time (e.g. av
274 * may contain an object scalar whose destructor gets
275 * called) so we have to unlock threads_mutex and start
278 MUTEX_UNLOCK(&threads_mutex);
280 SvREFCNT_dec((SV*)av);
281 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
282 "perl_destruct: joined zombie %p OK\n", t));
284 case THRf_R_JOINABLE:
285 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
286 "perl_destruct: detaching thread %p\n", t));
287 ThrSETSTATE(t, THRf_R_DETACHED);
289 * We unlock threads_mutex and t->mutex in the opposite order
290 * from which we locked them just so that DETACH won't
291 * deadlock if it panics. It's only a breach of good style
292 * not a bug since they are unlocks not locks.
294 MUTEX_UNLOCK(&threads_mutex);
296 MUTEX_UNLOCK(&t->mutex);
299 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
300 "perl_destruct: ignoring %p (state %u)\n",
302 MUTEX_UNLOCK(&t->mutex);
303 /* fall through and out */
306 /* We leave the above "Pass 1" loop with threads_mutex still locked */
308 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
311 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
312 "perl_destruct: final wait for %d threads\n",
314 COND_WAIT(&nthreads_cond, &threads_mutex);
316 /* At this point, we're the last thread */
317 MUTEX_UNLOCK(&threads_mutex);
318 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
319 MUTEX_DESTROY(&threads_mutex);
320 COND_DESTROY(&nthreads_cond);
321 #endif /* !defined(FAKE_THREADS) */
322 #endif /* USE_THREADS */
324 destruct_level = perl_destruct_level;
328 if (s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL")) {
330 if (destruct_level < i)
343 /* We must account for everything. */
345 /* Destroy the main CV and syntax tree */
347 curpad = AvARRAY(comppad);
353 SvREFCNT_dec(main_cv);
358 * Try to destruct global references. We do this first so that the
359 * destructors and destructees still exist. Some sv's might remain.
360 * Non-referenced objects are on their own.
367 /* unhook hooks which will soon be, or use, destroyed data */
368 SvREFCNT_dec(warnhook);
370 SvREFCNT_dec(diehook);
372 SvREFCNT_dec(parsehook);
375 /* call exit list functions */
376 while (exitlistlen-- > 0)
377 exitlist[exitlistlen].fn(PERL_OBJECT_THIS_ exitlist[exitlistlen].ptr);
381 if (destruct_level == 0){
383 DEBUG_P(debprofdump());
385 /* The exit() function will do everything that needs doing. */
389 /* loosen bonds of global variables */
392 (void)PerlIO_close(rsfp);
396 /* Filters for program text */
397 SvREFCNT_dec(rsfp_filters);
398 rsfp_filters = Nullav;
410 sawampersand = FALSE; /* must save all match strings */
411 sawstudy = FALSE; /* do fbm_instr on all strings */
419 SvREFCNT_dec(e_script);
423 /* magical thingies */
425 Safefree(ofs); /* $, */
428 Safefree(ors); /* $\ */
431 SvREFCNT_dec(rs); /* $/ */
434 SvREFCNT_dec(nrs); /* $/ helper */
437 multiline = 0; /* $* */
439 SvREFCNT_dec(statname);
443 /* defgv, aka *_ should be taken care of elsewhere */
445 /* clean up after study() */
446 SvREFCNT_dec(lastscream);
448 Safefree(screamfirst);
450 Safefree(screamnext);
453 /* startup and shutdown function lists */
454 SvREFCNT_dec(beginav);
456 SvREFCNT_dec(initav);
461 /* shortcuts just get cleared */
473 /* reset so print() ends up where we expect */
476 /* Prepare to destruct main symbol table. */
483 if (destruct_level >= 2) {
484 if (scopestack_ix != 0)
485 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
486 (long)scopestack_ix);
487 if (savestack_ix != 0)
488 warn("Unbalanced saves: %ld more saves than restores\n",
490 if (tmps_floor != -1)
491 warn("Unbalanced tmps: %ld more allocs than frees\n",
492 (long)tmps_floor + 1);
493 if (cxstack_ix != -1)
494 warn("Unbalanced context: %ld more PUSHes than POPs\n",
495 (long)cxstack_ix + 1);
498 /* Now absolutely destruct everything, somehow or other, loops or no. */
500 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
501 while (sv_count != 0 && sv_count != last_sv_count) {
502 last_sv_count = sv_count;
505 SvFLAGS(strtab) &= ~SVTYPEMASK;
506 SvFLAGS(strtab) |= SVt_PVHV;
508 /* Destruct the global string table. */
510 /* Yell and reset the HeVAL() slots that are still holding refcounts,
511 * so that sv_free() won't fail on them.
520 array = HvARRAY(strtab);
524 warn("Unbalanced string table refcount: (%d) for \"%s\"",
525 HeVAL(hent) - Nullsv, HeKEY(hent));
526 HeVAL(hent) = Nullsv;
536 SvREFCNT_dec(strtab);
539 warn("Scalars leaked: %ld\n", (long)sv_count);
543 /* No SVs have survived, need to clean out */
546 Safefree(origfilename);
547 Safefree(archpat_auto);
548 Safefree(reg_start_tmp);
549 Safefree(HeKEY_hek(&hv_fetch_ent_mh));
552 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
554 DEBUG_P(debprofdump());
556 MUTEX_DESTROY(&sv_mutex);
557 MUTEX_DESTROY(&eval_mutex);
558 COND_DESTROY(&eval_cond);
560 /* As the penultimate thing, free the non-arena SV for thrsv */
561 Safefree(SvPVX(thrsv));
562 Safefree(SvANY(thrsv));
565 #endif /* USE_THREADS */
567 /* As the absolutely last thing, free the non-arena SV for mess() */
570 /* we know that type >= SVt_PV */
572 Safefree(SvPVX(mess_sv));
573 Safefree(SvANY(mess_sv));
581 CPerlObj::perl_free(void)
583 perl_free(PerlInterpreter *sv_interp)
589 if (!(curinterp = sv_interp))
597 CPerlObj::perl_atexit(void (*fn) (CPerlObj*,void *), void *ptr)
599 perl_atexit(void (*fn) (void *), void *ptr)
602 Renew(exitlist, exitlistlen+1, PerlExitListEntry);
603 exitlist[exitlistlen].fn = fn;
604 exitlist[exitlistlen].ptr = ptr;
610 CPerlObj::perl_parse(void (*xsinit) (CPerlObj*), int argc, char **argv, char **env)
612 perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char **argv, char **env)
618 char *scriptname = NULL;
619 VOL bool dosearch = FALSE;
627 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
630 croak("suidperl is no longer needed since the kernel can now execute\n\
631 setuid perl scripts securely.\n");
636 if (!(curinterp = sv_interp))
640 #if defined(NeXT) && defined(__DYNAMIC__)
641 _dyld_lookup_and_bind
642 ("__environ", (unsigned long *) &environ_pointer, NULL);
647 #ifndef VMS /* VMS doesn't have environ array */
648 origenviron = environ;
653 /* Come here if running an undumped a.out. */
655 origfilename = savepv(argv[0]);
657 cxstack_ix = -1; /* start label stack again */
659 init_postdump_symbols(argc,argv,env);
664 curpad = AvARRAY(comppad);
669 SvREFCNT_dec(main_cv);
673 oldscope = scopestack_ix;
681 /* my_exit() was called */
682 while (scopestack_ix > oldscope)
687 call_list(oldscope, endav);
689 return STATUS_NATIVE_EXPORT;
692 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
696 sv_setpvn(linestr,"",0);
697 sv = newSVpv("",0); /* first used for -I flags */
701 for (argc--,argv++; argc > 0; argc--,argv++) {
702 if (argv[0][0] != '-' || !argv[0][1])
706 validarg = " PHOOEY ";
732 if (s = moreswitches(s))
742 if (euid != uid || egid != gid)
743 croak("No -e allowed in setuid scripts");
745 e_script = newSVpv("",0);
746 filter_add(read_e_script, NULL);
749 sv_catpv(e_script, s);
751 sv_catpv(e_script, argv[1]);
755 croak("No code specified for -e");
756 sv_catpv(e_script, "\n");
759 case 'I': /* -I handled both here and in moreswitches() */
761 if (!*++s && (s=argv[1]) != Nullch) {
764 while (s && isSPACE(*s))
768 for (e = s; *e && !isSPACE(*e); e++) ;
775 } /* XXX else croak? */
789 preambleav = newAV();
790 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
792 Sv = newSVpv("print myconfig();",0);
794 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
796 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
798 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
799 sv_catpv(Sv,"\" Compile-time options:");
801 sv_catpv(Sv," DEBUGGING");
804 sv_catpv(Sv," NO_EMBED");
807 sv_catpv(Sv," MULTIPLICITY");
809 sv_catpv(Sv,"\\n\",");
811 #if defined(LOCAL_PATCH_COUNT)
812 if (LOCAL_PATCH_COUNT > 0) {
814 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
815 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
817 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
821 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
824 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
826 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
831 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
832 print \" \\%ENV:\\n @env\\n\" if @env; \
833 print \" \\@INC:\\n @INC\\n\";");
836 Sv = newSVpv("config_vars(qw(",0);
841 av_push(preambleav, Sv);
842 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
853 if (!*++s || isSPACE(*s)) {
857 /* catch use of gnu style long options */
858 if (strEQ(s, "version")) {
862 if (strEQ(s, "help")) {
869 croak("Unrecognized switch: -%s (-h will show valid options)",s);
874 if (!tainting && (s = PerlEnv_getenv("PERL5OPT"))) {
885 if (!strchr("DIMUdmw", *s))
886 croak("Illegal switch in PERL5OPT: -%c", *s);
892 scriptname = argv[0];
895 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
897 else if (scriptname == Nullch) {
899 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
907 open_script(scriptname,dosearch,sv,&fdscript);
909 validate_suid(validarg, scriptname,fdscript);
914 main_cv = compcv = (CV*)NEWSV(1104,0);
915 sv_upgrade((SV *)compcv, SVt_PVCV);
919 av_push(comppad, Nullsv);
920 curpad = AvARRAY(comppad);
921 comppad_name = newAV();
922 comppad_name_fill = 0;
923 min_intro_pending = 0;
926 av_store(comppad_name, 0, newSVpv("@_", 2));
927 curpad[0] = (SV*)newAV();
928 SvPADMY_on(curpad[0]); /* XXX Needed? */
930 New(666, CvMUTEXP(compcv), 1, perl_mutex);
931 MUTEX_INIT(CvMUTEXP(compcv));
932 #endif /* USE_THREADS */
934 comppadlist = newAV();
935 AvREAL_off(comppadlist);
936 av_store(comppadlist, 0, (SV*)comppad_name);
937 av_store(comppadlist, 1, (SV*)comppad);
938 CvPADLIST(compcv) = comppadlist;
940 boot_core_UNIVERSAL();
943 (*xsinit)(PERL_OBJECT_THIS); /* in case linked C routines want magical variables */
944 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
948 init_predump_symbols();
949 /* init_postdump_symbols not currently designed to be called */
950 /* more than once (ENV isn't cleared first, for example) */
951 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
953 init_postdump_symbols(argc,argv,env);
957 /* now parse the script */
959 SETERRNO(0,SS$_NORMAL);
961 if (yyparse() || error_count) {
963 croak("%s had compilation errors.\n", origfilename);
965 croak("Execution of %s aborted due to compilation errors.\n",
969 curcop->cop_line = 0;
973 SvREFCNT_dec(e_script);
977 /* now that script is parsed, we can modify record separator */
979 rs = SvREFCNT_inc(nrs);
980 sv_setsv(perl_get_sv("/", TRUE), rs);
991 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
992 dump_mstats("after compilation:");
1003 CPerlObj::perl_run(void)
1005 perl_run(PerlInterpreter *sv_interp)
1014 if (!(curinterp = sv_interp))
1018 oldscope = scopestack_ix;
1023 cxstack_ix = -1; /* start context stack again */
1026 /* my_exit() was called */
1027 while (scopestack_ix > oldscope)
1030 curstash = defstash;
1032 call_list(oldscope, endav);
1034 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1035 dump_mstats("after execution: ");
1038 return STATUS_NATIVE_EXPORT;
1041 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1046 POPSTACK_TO(mainstack);
1050 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1051 sawampersand ? "Enabling" : "Omitting"));
1054 DEBUG_x(dump_all());
1055 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1057 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1058 (unsigned long) thr));
1059 #endif /* USE_THREADS */
1062 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1065 if (PERLDB_SINGLE && DBsingle)
1066 sv_setiv(DBsingle, 1);
1068 call_list(oldscope, initav);
1078 else if (main_start) {
1079 CvDEPTH(main_cv) = 1;
1090 perl_get_sv(char *name, I32 create)
1094 if (name[1] == '\0' && !isALPHA(name[0])) {
1095 PADOFFSET tmp = find_threadsv(name);
1096 if (tmp != NOT_IN_PAD) {
1098 return THREADSV(tmp);
1101 #endif /* USE_THREADS */
1102 gv = gv_fetchpv(name, create, SVt_PV);
1109 perl_get_av(char *name, I32 create)
1111 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1120 perl_get_hv(char *name, I32 create)
1122 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1131 perl_get_cv(char *name, I32 create)
1133 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1134 if (create && !GvCVu(gv))
1135 return newSUB(start_subparse(FALSE, 0),
1136 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1144 /* Be sure to refetch the stack pointer after calling these routines. */
1147 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1149 /* See G_* flags in cop.h */
1150 /* null terminated arg list */
1157 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1162 return perl_call_pv(sub_name, flags);
1166 perl_call_pv(char *sub_name, I32 flags)
1167 /* name of the subroutine */
1168 /* See G_* flags in cop.h */
1170 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1174 perl_call_method(char *methname, I32 flags)
1175 /* name of the subroutine */
1176 /* See G_* flags in cop.h */
1182 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1187 return perl_call_sv(*stack_sp--, flags);
1190 /* May be called with any of a CV, a GV, or an SV containing the name. */
1192 perl_call_sv(SV *sv, I32 flags)
1194 /* See G_* flags in cop.h */
1197 LOGOP myop; /* fake syntax tree node */
1201 bool oldcatch = CATCH_GET;
1206 if (flags & G_DISCARD) {
1211 Zero(&myop, 1, LOGOP);
1212 myop.op_next = Nullop;
1213 if (!(flags & G_NOARGS))
1214 myop.op_flags |= OPf_STACKED;
1215 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1216 (flags & G_ARRAY) ? OPf_WANT_LIST :
1221 EXTEND(stack_sp, 1);
1224 oldscope = scopestack_ix;
1226 if (PERLDB_SUB && curstash != debstash
1227 /* Handle first BEGIN of -d. */
1228 && (DBcv || (DBcv = GvCV(DBsub)))
1229 /* Try harder, since this may have been a sighandler, thus
1230 * curstash may be meaningless. */
1231 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash)
1232 && !(flags & G_NODEBUG))
1233 op->op_private |= OPpENTERSUB_DB;
1235 if (flags & G_EVAL) {
1236 cLOGOP->op_other = op;
1238 /* we're trying to emulate pp_entertry() here */
1240 register PERL_CONTEXT *cx;
1241 I32 gimme = GIMME_V;
1246 push_return(op->op_next);
1247 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1249 eval_root = op; /* Only needed so that goto works right. */
1252 if (flags & G_KEEPERR)
1267 /* my_exit() was called */
1268 curstash = defstash;
1272 croak("Callback called exit");
1281 stack_sp = stack_base + oldmark;
1282 if (flags & G_ARRAY)
1286 *++stack_sp = &sv_undef;
1294 if (op == (OP*)&myop)
1295 op = pp_entersub(ARGS);
1298 retval = stack_sp - (stack_base + oldmark);
1299 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1303 if (flags & G_EVAL) {
1304 if (scopestack_ix > oldscope) {
1308 register PERL_CONTEXT *cx;
1320 CATCH_SET(oldcatch);
1322 if (flags & G_DISCARD) {
1323 stack_sp = stack_base + oldmark;
1332 /* Eval a string. The G_EVAL flag is always assumed. */
1335 perl_eval_sv(SV *sv, I32 flags)
1337 /* See G_* flags in cop.h */
1340 UNOP myop; /* fake syntax tree node */
1341 I32 oldmark = SP - stack_base;
1348 if (flags & G_DISCARD) {
1356 EXTEND(stack_sp, 1);
1358 oldscope = scopestack_ix;
1360 if (!(flags & G_NOARGS))
1361 myop.op_flags = OPf_STACKED;
1362 myop.op_next = Nullop;
1363 myop.op_type = OP_ENTEREVAL;
1364 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1365 (flags & G_ARRAY) ? OPf_WANT_LIST :
1367 if (flags & G_KEEPERR)
1368 myop.op_flags |= OPf_SPECIAL;
1378 /* my_exit() was called */
1379 curstash = defstash;
1383 croak("Callback called exit");
1392 stack_sp = stack_base + oldmark;
1393 if (flags & G_ARRAY)
1397 *++stack_sp = &sv_undef;
1402 if (op == (OP*)&myop)
1403 op = pp_entereval(ARGS);
1406 retval = stack_sp - (stack_base + oldmark);
1407 if (!(flags & G_KEEPERR))
1412 if (flags & G_DISCARD) {
1413 stack_sp = stack_base + oldmark;
1423 perl_eval_pv(char *p, I32 croak_on_error)
1426 SV* sv = newSVpv(p, 0);
1429 perl_eval_sv(sv, G_SCALAR);
1436 if (croak_on_error && SvTRUE(ERRSV))
1437 croak(SvPVx(ERRSV, na));
1442 /* Require a module. */
1445 perl_require_pv(char *pv)
1449 PUSHSTACKi(PERLSI_REQUIRE);
1451 sv = sv_newmortal();
1452 sv_setpv(sv, "require '");
1455 perl_eval_sv(sv, G_DISCARD);
1461 magicname(char *sym, char *name, I32 namlen)
1465 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1466 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1470 usage(char *name) /* XXX move this out into a module ? */
1473 /* This message really ought to be max 23 lines.
1474 * Removed -h because the user already knows that opton. Others? */
1476 static char *usage_msg[] = {
1477 "-0[octal] specify record separator (\\0, if no argument)",
1478 "-a autosplit mode with -n or -p (splits $_ into @F)",
1479 "-c check syntax only (runs BEGIN and END blocks)",
1480 "-d[:debugger] run scripts under debugger",
1481 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1482 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1483 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1484 "-i[extension] edit <> files in place (make backup if extension supplied)",
1485 "-Idirectory specify @INC/#include directory (may be used more than once)",
1486 "-l[octal] enable line ending processing, specifies line terminator",
1487 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1488 "-n assume 'while (<>) { ... }' loop around your script",
1489 "-p assume loop like -n but print line also like sed",
1490 "-P run script through C preprocessor before compilation",
1491 "-s enable some switch parsing for switches after script name",
1492 "-S look for the script using PATH environment variable",
1493 "-T turn on tainting checks",
1494 "-u dump core after parsing script",
1495 "-U allow unsafe operations",
1496 "-v print version number, patchlevel plus VERY IMPORTANT perl info",
1497 "-V[:variable] print perl configuration information",
1498 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1499 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1503 char **p = usage_msg;
1505 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1507 printf("\n %s", *p++);
1510 /* This routine handles any switches that can be given during run */
1513 moreswitches(char *s)
1522 rschar = scan_oct(s, 4, &numlen);
1524 if (rschar & ~((U8)~0))
1526 else if (!rschar && numlen >= 2)
1527 nrs = newSVpv("", 0);
1530 nrs = newSVpv(&ch, 1);
1536 splitstr = savepv(s + 1);
1550 if (*s == ':' || *s == '=') {
1551 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1555 perldb = PERLDB_ALL;
1562 if (isALPHA(s[1])) {
1563 static char debopts[] = "psltocPmfrxuLHXD";
1566 for (s++; *s && (d = strchr(debopts,*s)); s++)
1567 debug |= 1 << (d - debopts);
1571 for (s++; isDIGIT(*s); s++) ;
1573 debug |= 0x80000000;
1575 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1576 for (s++; isALNUM(*s); s++) ;
1586 inplace = savepv(s+1);
1588 for (s = inplace; *s && !isSPACE(*s); s++) ;
1591 if (*s == '-') /* Additional switches on #! line. */
1595 case 'I': /* -I handled both here and in parse_perl() */
1598 while (*s && isSPACE(*s))
1602 for (e = s; *e && !isSPACE(*e); e++) ;
1603 p = savepvn(s, e-s);
1609 croak("No space allowed after -I");
1619 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1629 ors = SvPV(nrs, orslen);
1630 ors = savepvn(ors, orslen);
1634 forbid_setid("-M"); /* XXX ? */
1637 forbid_setid("-m"); /* XXX ? */
1642 /* -M-foo == 'no foo' */
1643 if (*s == '-') { use = "no "; ++s; }
1644 sv = newSVpv(use,0);
1646 /* We allow -M'Module qw(Foo Bar)' */
1647 while(isALNUM(*s) || *s==':') ++s;
1649 sv_catpv(sv, start);
1650 if (*(start-1) == 'm') {
1652 croak("Can't use '%c' after -mname", *s);
1653 sv_catpv( sv, " ()");
1656 sv_catpvn(sv, start, s-start);
1657 sv_catpv(sv, " split(/,/,q{");
1662 if (preambleav == NULL)
1663 preambleav = newAV();
1664 av_push(preambleav, sv);
1667 croak("No space allowed after -%c", *(s-1));
1684 croak("Too late for \"-T\" option");
1696 #if defined(SUBVERSION) && SUBVERSION > 0
1697 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1698 PATCHLEVEL, SUBVERSION, ARCHNAME);
1700 printf("\nThis is perl, version %s built for %s",
1701 patchlevel, ARCHNAME);
1703 #if defined(LOCAL_PATCH_COUNT)
1704 if (LOCAL_PATCH_COUNT > 0)
1705 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1706 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1709 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1711 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1714 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1715 printf("djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1998\n");
1718 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1719 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1722 printf("atariST series port, ++jrb bammi@cadence.com\n");
1725 printf("BeOS port Copyright Tom Spindler, 1997-1998\n");
1728 printf("MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-1998\n");
1730 #ifdef BINARY_BUILD_NOTICE
1731 BINARY_BUILD_NOTICE;
1734 Perl may be copied only under the terms of either the Artistic License or the\n\
1735 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\
1736 Complete documentation for Perl, including FAQ lists, should be found on\n\
1737 this system using `man perl' or `perldoc perl'. If you have access to the\n\
1738 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
1746 if (s[1] == '-') /* Additional switches on #! line. */
1757 #ifdef ALTERNATE_SHEBANG
1758 case 'S': /* OS/2 needs -S on "extproc" line. */
1766 croak("Can't emulate -%.1s on #! line",s);
1771 /* compliments of Tom Christiansen */
1773 /* unexec() can be found in the Gnu emacs distribution */
1774 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
1785 prog = newSVpv(BIN_EXP, 0);
1786 sv_catpv(prog, "/perl");
1787 file = newSVpv(origfilename, 0);
1788 sv_catpv(file, ".perldump");
1790 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1791 /* unexec prints msg to stderr in case of failure */
1792 PerlProc_exit(status);
1795 # include <lib$routines.h>
1796 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1798 ABORT(); /* for use with undump */
1803 /* initialize curinterp */
1808 #ifdef PERL_OBJECT /* XXX kludge */
1813 curcop = &compiling; \
1818 laststype = OP_STAT; \
1820 maxsysfd = MAXSYSFD; \
1821 statname = Nullsv; \
1827 laststype = OP_STAT; \
1834 in_clean_objs = FALSE; \
1835 in_clean_all= FALSE; \
1836 profiledata = NULL; \
1838 rsfp_filters= Nullav; \
1842 # ifdef MULTIPLICITY
1843 # define PERLVAR(var,type)
1844 # define PERLVARI(var,type,init) curinterp->var = init;
1845 # define PERLVARIC(var,type,init) curinterp->var = init;
1846 # include "intrpvar.h"
1847 # ifndef USE_THREADS
1848 # include "thrdvar.h"
1854 # define PERLVAR(var,type)
1855 # define PERLVARI(var,type,init) var = init;
1856 # define PERLVARIC(var,type,init) var = init;
1857 # include "intrpvar.h"
1858 # ifndef USE_THREADS
1859 # include "thrdvar.h"
1870 init_main_stash(void)
1875 /* Note that strtab is a rather special HV. Assumptions are made
1876 about not iterating on it, and not adding tie magic to it.
1877 It is properly deallocated in perl_destruct() */
1879 HvSHAREKEYS_off(strtab); /* mandatory */
1880 hv_ksplit(strtab, 512);
1882 curstash = defstash = newHV();
1883 curstname = newSVpv("main",4);
1884 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1885 SvREFCNT_dec(GvHV(gv));
1886 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1888 HvNAME(defstash) = savepv("main");
1889 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1891 hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
1893 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1894 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1896 replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
1898 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1899 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1900 sv_setpvn(ERRSV, "", 0);
1901 curstash = defstash;
1902 compiling.cop_stash = defstash;
1903 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1904 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1905 /* We must init $/ before switches are processed. */
1906 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1910 open_script(char *scriptname, bool dosearch, SV *sv, int *fdscript)
1918 origfilename = savepv("-e");
1921 /* if find_script() returns, it returns a malloc()-ed value */
1922 origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
1924 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1925 char *s = scriptname + 8;
1926 *fdscript = atoi(s);
1930 scriptname = savepv(s + 1);
1931 Safefree(origfilename);
1932 origfilename = scriptname;
1937 curcop->cop_filegv = gv_fetchfile(origfilename);
1938 if (strEQ(origfilename,"-"))
1940 if (*fdscript >= 0) {
1941 rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1942 #if defined(HAS_FCNTL) && defined(F_SETFD)
1944 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1947 else if (preprocess) {
1948 char *cpp_cfg = CPPSTDIN;
1949 SV *cpp = newSVpv("",0);
1950 SV *cmd = NEWSV(0,0);
1952 if (strEQ(cpp_cfg, "cppstdin"))
1953 sv_catpvf(cpp, "%s/", BIN_EXP);
1954 sv_catpv(cpp, cpp_cfg);
1957 sv_catpv(sv,PRIVLIB_EXP);
1961 sed %s -e \"/^[^#]/b\" \
1962 -e \"/^#[ ]*include[ ]/b\" \
1963 -e \"/^#[ ]*define[ ]/b\" \
1964 -e \"/^#[ ]*if[ ]/b\" \
1965 -e \"/^#[ ]*ifdef[ ]/b\" \
1966 -e \"/^#[ ]*ifndef[ ]/b\" \
1967 -e \"/^#[ ]*else/b\" \
1968 -e \"/^#[ ]*elif[ ]/b\" \
1969 -e \"/^#[ ]*undef[ ]/b\" \
1970 -e \"/^#[ ]*endif/b\" \
1973 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1976 %s %s -e '/^[^#]/b' \
1977 -e '/^#[ ]*include[ ]/b' \
1978 -e '/^#[ ]*define[ ]/b' \
1979 -e '/^#[ ]*if[ ]/b' \
1980 -e '/^#[ ]*ifdef[ ]/b' \
1981 -e '/^#[ ]*ifndef[ ]/b' \
1982 -e '/^#[ ]*else/b' \
1983 -e '/^#[ ]*elif[ ]/b' \
1984 -e '/^#[ ]*undef[ ]/b' \
1985 -e '/^#[ ]*endif/b' \
1993 (doextract ? "-e '1,/^#/d\n'" : ""),
1995 scriptname, cpp, sv, CPPMINUS);
1997 #ifdef IAMSUID /* actually, this is caught earlier */
1998 if (euid != uid && !euid) { /* if running suidperl */
2000 (void)seteuid(uid); /* musn't stay setuid root */
2003 (void)setreuid((Uid_t)-1, uid);
2005 #ifdef HAS_SETRESUID
2006 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
2008 PerlProc_setuid(uid);
2012 if (PerlProc_geteuid() != uid)
2013 croak("Can't do seteuid!\n");
2015 #endif /* IAMSUID */
2016 rsfp = PerlProc_popen(SvPVX(cmd), "r");
2020 else if (!*scriptname) {
2021 forbid_setid("program input from stdin");
2022 rsfp = PerlIO_stdin();
2025 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2026 #if defined(HAS_FCNTL) && defined(F_SETFD)
2028 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2033 #ifndef IAMSUID /* in case script is not readable before setuid */
2034 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2035 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2037 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2038 croak("Can't do setuid\n");
2042 croak("Can't open perl script \"%s\": %s\n",
2043 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2048 validate_suid(char *validarg, char *scriptname, int fdscript)
2052 /* do we need to emulate setuid on scripts? */
2054 /* This code is for those BSD systems that have setuid #! scripts disabled
2055 * in the kernel because of a security problem. Merely defining DOSUID
2056 * in perl will not fix that problem, but if you have disabled setuid
2057 * scripts in the kernel, this will attempt to emulate setuid and setgid
2058 * on scripts that have those now-otherwise-useless bits set. The setuid
2059 * root version must be called suidperl or sperlN.NNN. If regular perl
2060 * discovers that it has opened a setuid script, it calls suidperl with
2061 * the same argv that it had. If suidperl finds that the script it has
2062 * just opened is NOT setuid root, it sets the effective uid back to the
2063 * uid. We don't just make perl setuid root because that loses the
2064 * effective uid we had before invoking perl, if it was different from the
2067 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2068 * be defined in suidperl only. suidperl must be setuid root. The
2069 * Configure script will set this up for you if you want it.
2076 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2077 croak("Can't stat script \"%s\"",origfilename);
2078 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2082 #ifndef HAS_SETREUID
2083 /* On this access check to make sure the directories are readable,
2084 * there is actually a small window that the user could use to make
2085 * filename point to an accessible directory. So there is a faint
2086 * chance that someone could execute a setuid script down in a
2087 * non-accessible directory. I don't know what to do about that.
2088 * But I don't think it's too important. The manual lies when
2089 * it says access() is useful in setuid programs.
2091 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2092 croak("Permission denied");
2094 /* If we can swap euid and uid, then we can determine access rights
2095 * with a simple stat of the file, and then compare device and
2096 * inode to make sure we did stat() on the same file we opened.
2097 * Then we just have to make sure he or she can execute it.
2100 struct stat tmpstatbuf;
2104 setreuid(euid,uid) < 0
2107 setresuid(euid,uid,(Uid_t)-1) < 0
2110 || PerlProc_getuid() != euid || PerlProc_geteuid() != uid)
2111 croak("Can't swap uid and euid"); /* really paranoid */
2112 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2113 croak("Permission denied"); /* testing full pathname here */
2114 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2115 tmpstatbuf.st_ino != statbuf.st_ino) {
2116 (void)PerlIO_close(rsfp);
2117 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2119 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2120 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2121 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2122 (long)statbuf.st_dev, (long)statbuf.st_ino,
2123 SvPVX(GvSV(curcop->cop_filegv)),
2124 (long)statbuf.st_uid, (long)statbuf.st_gid);
2125 (void)PerlProc_pclose(rsfp);
2127 croak("Permission denied\n");
2131 setreuid(uid,euid) < 0
2133 # if defined(HAS_SETRESUID)
2134 setresuid(uid,euid,(Uid_t)-1) < 0
2137 || PerlProc_getuid() != uid || PerlProc_geteuid() != euid)
2138 croak("Can't reswap uid and euid");
2139 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2140 croak("Permission denied\n");
2142 #endif /* HAS_SETREUID */
2143 #endif /* IAMSUID */
2145 if (!S_ISREG(statbuf.st_mode))
2146 croak("Permission denied");
2147 if (statbuf.st_mode & S_IWOTH)
2148 croak("Setuid/gid script is writable by world");
2149 doswitches = FALSE; /* -s is insecure in suid */
2151 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2152 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2153 croak("No #! line");
2154 s = SvPV(linestr,na)+2;
2156 while (!isSPACE(*s)) s++;
2157 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2158 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2159 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2160 croak("Not a perl script");
2161 while (*s == ' ' || *s == '\t') s++;
2163 * #! arg must be what we saw above. They can invoke it by
2164 * mentioning suidperl explicitly, but they may not add any strange
2165 * arguments beyond what #! says if they do invoke suidperl that way.
2167 len = strlen(validarg);
2168 if (strEQ(validarg," PHOOEY ") ||
2169 strnNE(s,validarg,len) || !isSPACE(s[len]))
2170 croak("Args must match #! line");
2173 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2174 euid == statbuf.st_uid)
2176 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2177 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2178 #endif /* IAMSUID */
2180 if (euid) { /* oops, we're not the setuid root perl */
2181 (void)PerlIO_close(rsfp);
2184 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2186 croak("Can't do setuid\n");
2189 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2191 (void)setegid(statbuf.st_gid);
2194 (void)setregid((Gid_t)-1,statbuf.st_gid);
2196 #ifdef HAS_SETRESGID
2197 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2199 PerlProc_setgid(statbuf.st_gid);
2203 if (PerlProc_getegid() != statbuf.st_gid)
2204 croak("Can't do setegid!\n");
2206 if (statbuf.st_mode & S_ISUID) {
2207 if (statbuf.st_uid != euid)
2209 (void)seteuid(statbuf.st_uid); /* all that for this */
2212 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2214 #ifdef HAS_SETRESUID
2215 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2217 PerlProc_setuid(statbuf.st_uid);
2221 if (PerlProc_geteuid() != statbuf.st_uid)
2222 croak("Can't do seteuid!\n");
2224 else if (uid) { /* oops, mustn't run as root */
2226 (void)seteuid((Uid_t)uid);
2229 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2231 #ifdef HAS_SETRESUID
2232 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2234 PerlProc_setuid((Uid_t)uid);
2238 if (PerlProc_geteuid() != uid)
2239 croak("Can't do seteuid!\n");
2242 if (!cando(S_IXUSR,TRUE,&statbuf))
2243 croak("Permission denied\n"); /* they can't do this */
2246 else if (preprocess)
2247 croak("-P not allowed for setuid/setgid script\n");
2248 else if (fdscript >= 0)
2249 croak("fd script not allowed in suidperl\n");
2251 croak("Script is not setuid/setgid in suidperl\n");
2253 /* We absolutely must clear out any saved ids here, so we */
2254 /* exec the real perl, substituting fd script for scriptname. */
2255 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2256 PerlIO_rewind(rsfp);
2257 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2258 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2259 if (!origargv[which])
2260 croak("Permission denied");
2261 origargv[which] = savepv(form("/dev/fd/%d/%s",
2262 PerlIO_fileno(rsfp), origargv[which]));
2263 #if defined(HAS_FCNTL) && defined(F_SETFD)
2264 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2266 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2267 croak("Can't do setuid\n");
2268 #endif /* IAMSUID */
2270 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2271 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2273 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2274 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2276 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2279 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2280 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2281 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2282 /* not set-id, must be wrapped */
2288 find_beginning(void)
2290 register char *s, *s2;
2292 /* skip forward in input to the real script? */
2296 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2297 croak("No Perl script found in input\n");
2298 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2299 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2301 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2303 while (*s == ' ' || *s == '\t') s++;
2305 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2306 if (strnEQ(s2-4,"perl",4))
2308 while (s = moreswitches(s)) ;
2310 if (cddir && PerlDir_chdir(cddir) < 0)
2311 croak("Can't chdir to %s",cddir);
2320 uid = (int)PerlProc_getuid();
2321 euid = (int)PerlProc_geteuid();
2322 gid = (int)PerlProc_getgid();
2323 egid = (int)PerlProc_getegid();
2328 tainting |= (uid && (euid != uid || egid != gid));
2332 forbid_setid(char *s)
2335 croak("No %s allowed while running setuid", s);
2337 croak("No %s allowed while running setgid", s);
2344 curstash = debstash;
2345 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2347 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2348 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2349 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2350 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2351 sv_setiv(DBsingle, 0);
2352 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2353 sv_setiv(DBtrace, 0);
2354 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2355 sv_setiv(DBsignal, 0);
2356 curstash = defstash;
2359 #ifndef STRESS_REALLOC
2360 #define REASONABLE(size) (size)
2362 #define REASONABLE(size) (1) /* unreasonable */
2366 init_stacks(ARGSproto)
2368 /* start with 128-item stack and 8K cxstack */
2369 curstackinfo = new_stackinfo(REASONABLE(128),
2370 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
2371 curstackinfo->si_type = PERLSI_MAIN;
2372 curstack = curstackinfo->si_stack;
2373 mainstack = curstack; /* remember in case we switch stacks */
2375 stack_base = AvARRAY(curstack);
2376 stack_sp = stack_base;
2377 stack_max = stack_base + AvMAX(curstack);
2379 New(50,tmps_stack,REASONABLE(128),SV*);
2382 tmps_max = REASONABLE(128);
2384 New(54,markstack,REASONABLE(32),I32);
2385 markstack_ptr = markstack;
2386 markstack_max = markstack + REASONABLE(32);
2390 New(54,scopestack,REASONABLE(32),I32);
2392 scopestack_max = REASONABLE(32);
2394 New(54,savestack,REASONABLE(128),ANY);
2396 savestack_max = REASONABLE(128);
2398 New(54,retstack,REASONABLE(16),OP*);
2400 retstack_max = REASONABLE(16);
2409 while (curstackinfo->si_next)
2410 curstackinfo = curstackinfo->si_next;
2411 while (curstackinfo) {
2412 PERL_SI *p = curstackinfo->si_prev;
2413 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
2414 Safefree(curstackinfo->si_cxstack);
2415 Safefree(curstackinfo);
2418 Safefree(tmps_stack);
2419 Safefree(markstack);
2420 Safefree(scopestack);
2421 Safefree(savestack);
2430 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2443 subname = newSVpv("main",4);
2447 init_predump_symbols(void)
2453 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2454 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2455 GvMULTI_on(stdingv);
2456 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2457 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2459 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2461 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2463 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2465 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2467 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2469 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2470 GvMULTI_on(othergv);
2471 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2472 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2474 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2476 statname = NEWSV(66,0); /* last filename we did stat on */
2479 osname = savepv(OSNAME);
2483 init_postdump_symbols(register int argc, register char **argv, register char **env)
2490 argc--,argv++; /* skip name of script */
2492 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2495 if (argv[0][1] == '-') {
2499 if (s = strchr(argv[0], '=')) {
2501 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2504 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2507 toptarget = NEWSV(0,0);
2508 sv_upgrade(toptarget, SVt_PVFM);
2509 sv_setpvn(toptarget, "", 0);
2510 bodytarget = NEWSV(0,0);
2511 sv_upgrade(bodytarget, SVt_PVFM);
2512 sv_setpvn(bodytarget, "", 0);
2513 formtarget = bodytarget;
2516 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2517 sv_setpv(GvSV(tmpgv),origfilename);
2518 magicname("0", "0", 1);
2520 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2521 sv_setpv(GvSV(tmpgv),origargv[0]);
2522 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2524 (void)gv_AVadd(argvgv);
2525 av_clear(GvAVn(argvgv));
2526 for (; argc > 0; argc--,argv++) {
2527 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2530 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2534 hv_magic(hv, envgv, 'E');
2535 #ifndef VMS /* VMS doesn't have environ array */
2536 /* Note that if the supplied env parameter is actually a copy
2537 of the global environ then it may now point to free'd memory
2538 if the environment has been modified since. To avoid this
2539 problem we treat env==NULL as meaning 'use the default'
2544 environ[0] = Nullch;
2545 for (; *env; env++) {
2546 if (!(s = strchr(*env,'=')))
2552 sv = newSVpv(s--,0);
2553 (void)hv_store(hv, *env, s - *env, sv, 0);
2555 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2556 /* Sins of the RTL. See note in my_setenv(). */
2557 (void)PerlEnv_putenv(savepv(*env));
2561 #ifdef DYNAMIC_ENV_FETCH
2562 HvNAME(hv) = savepv(ENV_HV_NAME);
2566 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2567 sv_setiv(GvSV(tmpgv), (IV)getpid());
2576 s = PerlEnv_getenv("PERL5LIB");
2580 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2582 /* Treat PERL5?LIB as a possible search list logical name -- the
2583 * "natural" VMS idiom for a Unix path string. We allow each
2584 * element to be a set of |-separated directories for compatibility.
2588 if (my_trnlnm("PERL5LIB",buf,0))
2589 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2591 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2595 /* Use the ~-expanded versions of APPLLIB (undocumented),
2596 ARCHLIB PRIVLIB SITEARCH and SITELIB
2599 incpush(APPLLIB_EXP, TRUE);
2603 incpush(ARCHLIB_EXP, FALSE);
2606 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2609 incpush(PRIVLIB_EXP, TRUE);
2611 incpush(PRIVLIB_EXP, FALSE);
2615 incpush(SITEARCH_EXP, FALSE);
2619 incpush(SITELIB_EXP, TRUE);
2621 incpush(SITELIB_EXP, FALSE);
2625 incpush(".", FALSE);
2629 # define PERLLIB_SEP ';'
2632 # define PERLLIB_SEP '|'
2634 # define PERLLIB_SEP ':'
2637 #ifndef PERLLIB_MANGLE
2638 # define PERLLIB_MANGLE(s,n) (s)
2642 incpush(char *p, int addsubdirs)
2644 SV *subdir = Nullsv;
2650 subdir = sv_newmortal();
2651 if (!archpat_auto) {
2652 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2653 + sizeof("//auto"));
2654 New(55, archpat_auto, len, char);
2655 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2657 for (len = sizeof(ARCHNAME) + 2;
2658 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2659 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2664 /* Break at all separators */
2666 SV *libdir = NEWSV(55,0);
2669 /* skip any consecutive separators */
2670 while ( *p == PERLLIB_SEP ) {
2671 /* Uncomment the next line for PATH semantics */
2672 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2676 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2677 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2682 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2683 p = Nullch; /* break out */
2687 * BEFORE pushing libdir onto @INC we may first push version- and
2688 * archname-specific sub-directories.
2691 struct stat tmpstatbuf;
2696 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2698 while (unix[len-1] == '/') len--; /* Cosmetic */
2699 sv_usepvn(libdir,unix,len);
2702 PerlIO_printf(PerlIO_stderr(),
2703 "Failed to unixify @INC element \"%s\"\n",
2706 /* .../archname/version if -d .../archname/version/auto */
2707 sv_setsv(subdir, libdir);
2708 sv_catpv(subdir, archpat_auto);
2709 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2710 S_ISDIR(tmpstatbuf.st_mode))
2711 av_push(GvAVn(incgv),
2712 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2714 /* .../archname if -d .../archname/auto */
2715 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2716 strlen(patchlevel) + 1, "", 0);
2717 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2718 S_ISDIR(tmpstatbuf.st_mode))
2719 av_push(GvAVn(incgv),
2720 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2723 /* finally push this lib directory on the end of @INC */
2724 av_push(GvAVn(incgv), libdir);
2729 STATIC struct perl_thread *
2732 struct perl_thread *thr;
2735 Newz(53, thr, 1, struct perl_thread);
2736 curcop = &compiling;
2737 thr->cvcache = newHV();
2738 thr->threadsv = newAV();
2739 /* thr->threadsvp is set when find_threadsv is called */
2740 thr->specific = newAV();
2741 thr->errhv = newHV();
2742 thr->flags = THRf_R_JOINABLE;
2743 MUTEX_INIT(&thr->mutex);
2744 /* Handcraft thrsv similarly to mess_sv */
2745 New(53, thrsv, 1, SV);
2746 Newz(53, xpv, 1, XPV);
2747 SvFLAGS(thrsv) = SVt_PV;
2748 SvANY(thrsv) = (void*)xpv;
2749 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2750 SvPVX(thrsv) = (char*)thr;
2751 SvCUR_set(thrsv, sizeof(thr));
2752 SvLEN_set(thrsv, sizeof(thr));
2753 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2757 MUTEX_LOCK(&threads_mutex);
2762 MUTEX_UNLOCK(&threads_mutex);
2764 #ifdef HAVE_THREAD_INTERN
2765 init_thread_intern(thr);
2768 #ifdef SET_THREAD_SELF
2769 SET_THREAD_SELF(thr);
2771 thr->self = pthread_self();
2772 #endif /* SET_THREAD_SELF */
2776 * These must come after the SET_THR because sv_setpvn does
2777 * SvTAINT and the taint fields require dTHR.
2779 toptarget = NEWSV(0,0);
2780 sv_upgrade(toptarget, SVt_PVFM);
2781 sv_setpvn(toptarget, "", 0);
2782 bodytarget = NEWSV(0,0);
2783 sv_upgrade(bodytarget, SVt_PVFM);
2784 sv_setpvn(bodytarget, "", 0);
2785 formtarget = bodytarget;
2786 thr->errsv = newSVpv("", 0);
2787 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2790 regcompp = FUNC_NAME_TO_PTR(pregcomp);
2791 regexecp = FUNC_NAME_TO_PTR(regexec_flags);
2797 #endif /* USE_THREADS */
2800 call_list(I32 oldscope, AV *paramList)
2803 line_t oldline = curcop->cop_line;
2808 while (AvFILL(paramList) >= 0) {
2809 CV *cv = (CV*)av_shift(paramList);
2818 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2819 (void)SvPV(atsv, len);
2822 curcop = &compiling;
2823 curcop->cop_line = oldline;
2824 if (paramList == beginav)
2825 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2827 sv_catpv(atsv, "END failed--cleanup aborted");
2828 while (scopestack_ix > oldscope)
2830 croak("%s", SvPVX(atsv));
2838 /* my_exit() was called */
2839 while (scopestack_ix > oldscope)
2842 curstash = defstash;
2844 call_list(oldscope, endav);
2846 curcop = &compiling;
2847 curcop->cop_line = oldline;
2849 if (paramList == beginav)
2850 croak("BEGIN failed--compilation aborted");
2852 croak("END failed--cleanup aborted");
2858 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2863 curcop = &compiling;
2864 curcop->cop_line = oldline;
2877 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2878 thr, (unsigned long) status));
2879 #endif /* USE_THREADS */
2888 STATUS_NATIVE_SET(status);
2895 my_failure_exit(void)
2898 if (vaxc$errno & 1) {
2899 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2900 STATUS_NATIVE_SET(44);
2903 if (!vaxc$errno && errno) /* unlikely */
2904 STATUS_NATIVE_SET(44);
2906 STATUS_NATIVE_SET(vaxc$errno);
2911 STATUS_POSIX_SET(errno);
2913 exitstatus = STATUS_POSIX >> 8;
2914 if (exitstatus & 255)
2915 STATUS_POSIX_SET(exitstatus);
2917 STATUS_POSIX_SET(255);
2927 register PERL_CONTEXT *cx;
2932 SvREFCNT_dec(e_script);
2936 POPSTACK_TO(mainstack);
2937 if (cxstack_ix >= 0) {
2952 read_e_script(CPerlObj *pPerl, int idx, SV *buf_sv, int maxlen)
2954 read_e_script(int idx, SV *buf_sv, int maxlen)
2958 p = SvPVX(e_script);
2959 nl = strchr(p, '\n');
2960 nl = (nl) ? nl+1 : SvEND(e_script);
2963 sv_catpvn(buf_sv, p, nl-p);
2964 sv_chop(e_script, nl);