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;
167 nrs = newSVpv("\n", 1);
168 rs = SvREFCNT_inc(nrs);
172 /* sighandlerp = sighandler; */
174 sighandlerp = sighandler;
180 * There is no way we can refer to them from Perl so close them to save
181 * space. The other alternative would be to provide STDAUX and STDPRN
184 (void)fclose(stdaux);
185 (void)fclose(stdprn);
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(nrs); /* $\ helper */
434 multiline = 0; /* $* */
436 SvREFCNT_dec(statname);
440 /* defgv, aka *_ should be taken care of elsewhere */
442 /* clean up after study() */
443 SvREFCNT_dec(lastscream);
445 Safefree(screamfirst);
447 Safefree(screamnext);
450 /* startup and shutdown function lists */
451 SvREFCNT_dec(beginav);
453 SvREFCNT_dec(initav);
458 /* shortcuts just get cleared */
470 /* reset so print() ends up where we expect */
473 /* Prepare to destruct main symbol table. */
480 if (destruct_level >= 2) {
481 if (scopestack_ix != 0)
482 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
483 (long)scopestack_ix);
484 if (savestack_ix != 0)
485 warn("Unbalanced saves: %ld more saves than restores\n",
487 if (tmps_floor != -1)
488 warn("Unbalanced tmps: %ld more allocs than frees\n",
489 (long)tmps_floor + 1);
490 if (cxstack_ix != -1)
491 warn("Unbalanced context: %ld more PUSHes than POPs\n",
492 (long)cxstack_ix + 1);
495 /* Now absolutely destruct everything, somehow or other, loops or no. */
497 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
498 while (sv_count != 0 && sv_count != last_sv_count) {
499 last_sv_count = sv_count;
502 SvFLAGS(strtab) &= ~SVTYPEMASK;
503 SvFLAGS(strtab) |= SVt_PVHV;
505 /* Destruct the global string table. */
507 /* Yell and reset the HeVAL() slots that are still holding refcounts,
508 * so that sv_free() won't fail on them.
517 array = HvARRAY(strtab);
521 warn("Unbalanced string table refcount: (%d) for \"%s\"",
522 HeVAL(hent) - Nullsv, HeKEY(hent));
523 HeVAL(hent) = Nullsv;
533 SvREFCNT_dec(strtab);
536 warn("Scalars leaked: %ld\n", (long)sv_count);
540 /* No SVs have survived, need to clean out */
543 Safefree(origfilename);
544 Safefree(archpat_auto);
545 Safefree(reg_start_tmp);
546 Safefree(HeKEY_hek(&hv_fetch_ent_mh));
549 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
551 DEBUG_P(debprofdump());
553 MUTEX_DESTROY(&sv_mutex);
554 MUTEX_DESTROY(&eval_mutex);
555 COND_DESTROY(&eval_cond);
557 /* As the penultimate thing, free the non-arena SV for thrsv */
558 Safefree(SvPVX(thrsv));
559 Safefree(SvANY(thrsv));
562 #endif /* USE_THREADS */
564 /* As the absolutely last thing, free the non-arena SV for mess() */
567 /* we know that type >= SVt_PV */
569 Safefree(SvPVX(mess_sv));
570 Safefree(SvANY(mess_sv));
578 CPerlObj::perl_free(void)
580 perl_free(PerlInterpreter *sv_interp)
586 if (!(curinterp = sv_interp))
594 CPerlObj::perl_atexit(void (*fn) (CPerlObj*,void *), void *ptr)
596 perl_atexit(void (*fn) (void *), void *ptr)
599 Renew(exitlist, exitlistlen+1, PerlExitListEntry);
600 exitlist[exitlistlen].fn = fn;
601 exitlist[exitlistlen].ptr = ptr;
607 CPerlObj::perl_parse(void (*xsinit) (CPerlObj*), int argc, char **argv, char **env)
609 perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char **argv, char **env)
615 char *scriptname = NULL;
616 VOL bool dosearch = FALSE;
624 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
627 croak("suidperl is no longer needed since the kernel can now execute\n\
628 setuid perl scripts securely.\n");
633 if (!(curinterp = sv_interp))
637 #if defined(NeXT) && defined(__DYNAMIC__)
638 _dyld_lookup_and_bind
639 ("__environ", (unsigned long *) &environ_pointer, NULL);
644 #ifndef VMS /* VMS doesn't have environ array */
645 origenviron = environ;
650 /* Come here if running an undumped a.out. */
652 origfilename = savepv(argv[0]);
654 cxstack_ix = -1; /* start label stack again */
656 init_postdump_symbols(argc,argv,env);
661 curpad = AvARRAY(comppad);
666 SvREFCNT_dec(main_cv);
670 oldscope = scopestack_ix;
678 /* my_exit() was called */
679 while (scopestack_ix > oldscope)
684 call_list(oldscope, endav);
686 return STATUS_NATIVE_EXPORT;
689 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
693 sv_setpvn(linestr,"",0);
694 sv = newSVpv("",0); /* first used for -I flags */
698 for (argc--,argv++; argc > 0; argc--,argv++) {
699 if (argv[0][0] != '-' || !argv[0][1])
703 validarg = " PHOOEY ";
729 if (s = moreswitches(s))
739 if (euid != uid || egid != gid)
740 croak("No -e allowed in setuid scripts");
742 e_script = newSVpv("",0);
743 filter_add(read_e_script, NULL);
746 sv_catpv(e_script, s);
748 sv_catpv(e_script, argv[1]);
752 croak("No code specified for -e");
753 sv_catpv(e_script, "\n");
756 case 'I': /* -I handled both here and in moreswitches() */
758 if (!*++s && (s=argv[1]) != Nullch) {
761 while (s && isSPACE(*s))
765 for (e = s; *e && !isSPACE(*e); e++) ;
772 } /* XXX else croak? */
786 preambleav = newAV();
787 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
789 Sv = newSVpv("print myconfig();",0);
791 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
793 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
795 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
796 sv_catpv(Sv,"\" Compile-time options:");
798 sv_catpv(Sv," DEBUGGING");
801 sv_catpv(Sv," NO_EMBED");
804 sv_catpv(Sv," MULTIPLICITY");
806 sv_catpv(Sv,"\\n\",");
808 #if defined(LOCAL_PATCH_COUNT)
809 if (LOCAL_PATCH_COUNT > 0) {
811 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
812 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
814 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
818 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
821 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
823 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
828 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
829 print \" \\%ENV:\\n @env\\n\" if @env; \
830 print \" \\@INC:\\n @INC\\n\";");
833 Sv = newSVpv("config_vars(qw(",0);
838 av_push(preambleav, Sv);
839 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
850 if (!*++s || isSPACE(*s)) {
854 /* catch use of gnu style long options */
855 if (strEQ(s, "version")) {
859 if (strEQ(s, "help")) {
866 croak("Unrecognized switch: -%s (-h will show valid options)",s);
871 if (!tainting && (s = PerlEnv_getenv("PERL5OPT"))) {
882 if (!strchr("DIMUdmw", *s))
883 croak("Illegal switch in PERL5OPT: -%c", *s);
889 scriptname = argv[0];
892 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
894 else if (scriptname == Nullch) {
896 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
904 open_script(scriptname,dosearch,sv,&fdscript);
906 validate_suid(validarg, scriptname,fdscript);
911 main_cv = compcv = (CV*)NEWSV(1104,0);
912 sv_upgrade((SV *)compcv, SVt_PVCV);
916 av_push(comppad, Nullsv);
917 curpad = AvARRAY(comppad);
918 comppad_name = newAV();
919 comppad_name_fill = 0;
920 min_intro_pending = 0;
923 av_store(comppad_name, 0, newSVpv("@_", 2));
924 curpad[0] = (SV*)newAV();
925 SvPADMY_on(curpad[0]); /* XXX Needed? */
927 New(666, CvMUTEXP(compcv), 1, perl_mutex);
928 MUTEX_INIT(CvMUTEXP(compcv));
929 #endif /* USE_THREADS */
931 comppadlist = newAV();
932 AvREAL_off(comppadlist);
933 av_store(comppadlist, 0, (SV*)comppad_name);
934 av_store(comppadlist, 1, (SV*)comppad);
935 CvPADLIST(compcv) = comppadlist;
937 boot_core_UNIVERSAL();
940 (*xsinit)(PERL_OBJECT_THIS); /* in case linked C routines want magical variables */
941 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
945 init_predump_symbols();
946 /* init_postdump_symbols not currently designed to be called */
947 /* more than once (ENV isn't cleared first, for example) */
948 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
950 init_postdump_symbols(argc,argv,env);
954 /* now parse the script */
956 SETERRNO(0,SS$_NORMAL);
958 if (yyparse() || error_count) {
960 croak("%s had compilation errors.\n", origfilename);
962 croak("Execution of %s aborted due to compilation errors.\n",
966 curcop->cop_line = 0;
970 SvREFCNT_dec(e_script);
974 /* now that script is parsed, we can modify record separator */
976 rs = SvREFCNT_inc(nrs);
977 sv_setsv(perl_get_sv("/", TRUE), rs);
988 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
989 dump_mstats("after compilation:");
1000 CPerlObj::perl_run(void)
1002 perl_run(PerlInterpreter *sv_interp)
1011 if (!(curinterp = sv_interp))
1015 oldscope = scopestack_ix;
1020 cxstack_ix = -1; /* start context stack again */
1023 /* my_exit() was called */
1024 while (scopestack_ix > oldscope)
1027 curstash = defstash;
1029 call_list(oldscope, endav);
1031 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1032 dump_mstats("after execution: ");
1035 return STATUS_NATIVE_EXPORT;
1038 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1043 POPSTACK_TO(mainstack);
1047 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1048 sawampersand ? "Enabling" : "Omitting"));
1051 DEBUG_x(dump_all());
1052 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1054 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1055 (unsigned long) thr));
1056 #endif /* USE_THREADS */
1059 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1062 if (PERLDB_SINGLE && DBsingle)
1063 sv_setiv(DBsingle, 1);
1065 call_list(oldscope, initav);
1075 else if (main_start) {
1076 CvDEPTH(main_cv) = 1;
1087 perl_get_sv(char *name, I32 create)
1091 if (name[1] == '\0' && !isALPHA(name[0])) {
1092 PADOFFSET tmp = find_threadsv(name);
1093 if (tmp != NOT_IN_PAD) {
1095 return THREADSV(tmp);
1098 #endif /* USE_THREADS */
1099 gv = gv_fetchpv(name, create, SVt_PV);
1106 perl_get_av(char *name, I32 create)
1108 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1117 perl_get_hv(char *name, I32 create)
1119 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1128 perl_get_cv(char *name, I32 create)
1130 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1131 if (create && !GvCVu(gv))
1132 return newSUB(start_subparse(FALSE, 0),
1133 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1141 /* Be sure to refetch the stack pointer after calling these routines. */
1144 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1146 /* See G_* flags in cop.h */
1147 /* null terminated arg list */
1154 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1159 return perl_call_pv(sub_name, flags);
1163 perl_call_pv(char *sub_name, I32 flags)
1164 /* name of the subroutine */
1165 /* See G_* flags in cop.h */
1167 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1171 perl_call_method(char *methname, I32 flags)
1172 /* name of the subroutine */
1173 /* See G_* flags in cop.h */
1179 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1184 return perl_call_sv(*stack_sp--, flags);
1187 /* May be called with any of a CV, a GV, or an SV containing the name. */
1189 perl_call_sv(SV *sv, I32 flags)
1191 /* See G_* flags in cop.h */
1194 LOGOP myop; /* fake syntax tree node */
1198 bool oldcatch = CATCH_GET;
1203 if (flags & G_DISCARD) {
1208 Zero(&myop, 1, LOGOP);
1209 myop.op_next = Nullop;
1210 if (!(flags & G_NOARGS))
1211 myop.op_flags |= OPf_STACKED;
1212 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1213 (flags & G_ARRAY) ? OPf_WANT_LIST :
1218 EXTEND(stack_sp, 1);
1221 oldscope = scopestack_ix;
1223 if (PERLDB_SUB && curstash != debstash
1224 /* Handle first BEGIN of -d. */
1225 && (DBcv || (DBcv = GvCV(DBsub)))
1226 /* Try harder, since this may have been a sighandler, thus
1227 * curstash may be meaningless. */
1228 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash)
1229 && !(flags & G_NODEBUG))
1230 op->op_private |= OPpENTERSUB_DB;
1232 if (flags & G_EVAL) {
1233 cLOGOP->op_other = op;
1235 /* we're trying to emulate pp_entertry() here */
1237 register PERL_CONTEXT *cx;
1238 I32 gimme = GIMME_V;
1243 push_return(op->op_next);
1244 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1246 eval_root = op; /* Only needed so that goto works right. */
1249 if (flags & G_KEEPERR)
1264 /* my_exit() was called */
1265 curstash = defstash;
1269 croak("Callback called exit");
1278 stack_sp = stack_base + oldmark;
1279 if (flags & G_ARRAY)
1283 *++stack_sp = &sv_undef;
1291 if (op == (OP*)&myop)
1292 op = pp_entersub(ARGS);
1295 retval = stack_sp - (stack_base + oldmark);
1296 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1300 if (flags & G_EVAL) {
1301 if (scopestack_ix > oldscope) {
1305 register PERL_CONTEXT *cx;
1317 CATCH_SET(oldcatch);
1319 if (flags & G_DISCARD) {
1320 stack_sp = stack_base + oldmark;
1329 /* Eval a string. The G_EVAL flag is always assumed. */
1332 perl_eval_sv(SV *sv, I32 flags)
1334 /* See G_* flags in cop.h */
1337 UNOP myop; /* fake syntax tree node */
1338 I32 oldmark = SP - stack_base;
1345 if (flags & G_DISCARD) {
1353 EXTEND(stack_sp, 1);
1355 oldscope = scopestack_ix;
1357 if (!(flags & G_NOARGS))
1358 myop.op_flags = OPf_STACKED;
1359 myop.op_next = Nullop;
1360 myop.op_type = OP_ENTEREVAL;
1361 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1362 (flags & G_ARRAY) ? OPf_WANT_LIST :
1364 if (flags & G_KEEPERR)
1365 myop.op_flags |= OPf_SPECIAL;
1375 /* my_exit() was called */
1376 curstash = defstash;
1380 croak("Callback called exit");
1389 stack_sp = stack_base + oldmark;
1390 if (flags & G_ARRAY)
1394 *++stack_sp = &sv_undef;
1399 if (op == (OP*)&myop)
1400 op = pp_entereval(ARGS);
1403 retval = stack_sp - (stack_base + oldmark);
1404 if (!(flags & G_KEEPERR))
1409 if (flags & G_DISCARD) {
1410 stack_sp = stack_base + oldmark;
1420 perl_eval_pv(char *p, I32 croak_on_error)
1423 SV* sv = newSVpv(p, 0);
1426 perl_eval_sv(sv, G_SCALAR);
1433 if (croak_on_error && SvTRUE(ERRSV))
1434 croak(SvPVx(ERRSV, na));
1439 /* Require a module. */
1442 perl_require_pv(char *pv)
1446 PUSHSTACKi(PERLSI_REQUIRE);
1448 sv = sv_newmortal();
1449 sv_setpv(sv, "require '");
1452 perl_eval_sv(sv, G_DISCARD);
1458 magicname(char *sym, char *name, I32 namlen)
1462 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1463 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1467 usage(char *name) /* XXX move this out into a module ? */
1470 /* This message really ought to be max 23 lines.
1471 * Removed -h because the user already knows that opton. Others? */
1473 static char *usage_msg[] = {
1474 "-0[octal] specify record separator (\\0, if no argument)",
1475 "-a autosplit mode with -n or -p (splits $_ into @F)",
1476 "-c check syntax only (runs BEGIN and END blocks)",
1477 "-d[:debugger] run scripts under debugger",
1478 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1479 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1480 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1481 "-i[extension] edit <> files in place (make backup if extension supplied)",
1482 "-Idirectory specify @INC/#include directory (may be used more than once)",
1483 "-l[octal] enable line ending processing, specifies line terminator",
1484 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1485 "-n assume 'while (<>) { ... }' loop around your script",
1486 "-p assume loop like -n but print line also like sed",
1487 "-P run script through C preprocessor before compilation",
1488 "-s enable some switch parsing for switches after script name",
1489 "-S look for the script using PATH environment variable",
1490 "-T turn on tainting checks",
1491 "-u dump core after parsing script",
1492 "-U allow unsafe operations",
1493 "-v print version number, patchlevel plus VERY IMPORTANT perl info",
1494 "-V[:variable] print perl configuration information",
1495 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1496 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1500 char **p = usage_msg;
1502 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1504 printf("\n %s", *p++);
1507 /* This routine handles any switches that can be given during run */
1510 moreswitches(char *s)
1519 rschar = scan_oct(s, 4, &numlen);
1521 if (rschar & ~((U8)~0))
1523 else if (!rschar && numlen >= 2)
1524 nrs = newSVpv("", 0);
1527 nrs = newSVpv(&ch, 1);
1533 splitstr = savepv(s + 1);
1547 if (*s == ':' || *s == '=') {
1548 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1552 perldb = PERLDB_ALL;
1559 if (isALPHA(s[1])) {
1560 static char debopts[] = "psltocPmfrxuLHXD";
1563 for (s++; *s && (d = strchr(debopts,*s)); s++)
1564 debug |= 1 << (d - debopts);
1568 for (s++; isDIGIT(*s); s++) ;
1570 debug |= 0x80000000;
1572 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1573 for (s++; isALNUM(*s); s++) ;
1583 inplace = savepv(s+1);
1585 for (s = inplace; *s && !isSPACE(*s); s++) ;
1588 if (*s == '-') /* Additional switches on #! line. */
1592 case 'I': /* -I handled both here and in parse_perl() */
1595 while (*s && isSPACE(*s))
1599 for (e = s; *e && !isSPACE(*e); e++) ;
1600 p = savepvn(s, e-s);
1606 croak("No space allowed after -I");
1616 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1626 ors = SvPV(nrs, orslen);
1627 ors = savepvn(ors, orslen);
1631 forbid_setid("-M"); /* XXX ? */
1634 forbid_setid("-m"); /* XXX ? */
1639 /* -M-foo == 'no foo' */
1640 if (*s == '-') { use = "no "; ++s; }
1641 sv = newSVpv(use,0);
1643 /* We allow -M'Module qw(Foo Bar)' */
1644 while(isALNUM(*s) || *s==':') ++s;
1646 sv_catpv(sv, start);
1647 if (*(start-1) == 'm') {
1649 croak("Can't use '%c' after -mname", *s);
1650 sv_catpv( sv, " ()");
1653 sv_catpvn(sv, start, s-start);
1654 sv_catpv(sv, " split(/,/,q{");
1659 if (preambleav == NULL)
1660 preambleav = newAV();
1661 av_push(preambleav, sv);
1664 croak("No space allowed after -%c", *(s-1));
1681 croak("Too late for \"-T\" option");
1693 #if defined(SUBVERSION) && SUBVERSION > 0
1694 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1695 PATCHLEVEL, SUBVERSION, ARCHNAME);
1697 printf("\nThis is perl, version %s built for %s",
1698 patchlevel, ARCHNAME);
1700 #if defined(LOCAL_PATCH_COUNT)
1701 if (LOCAL_PATCH_COUNT > 0)
1702 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1703 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1706 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1708 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1711 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1712 printf("djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1998\n");
1715 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1716 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1719 printf("atariST series port, ++jrb bammi@cadence.com\n");
1721 #ifdef BINARY_BUILD_NOTICE
1722 BINARY_BUILD_NOTICE;
1725 Perl may be copied only under the terms of either the Artistic License or the\n\
1726 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\
1727 Complete documentation for Perl, including FAQ lists, should be found on\n\
1728 this system using `man perl' or `perldoc perl'. If you have access to the\n\
1729 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
1737 if (s[1] == '-') /* Additional switches on #! line. */
1748 #ifdef ALTERNATE_SHEBANG
1749 case 'S': /* OS/2 needs -S on "extproc" line. */
1757 croak("Can't emulate -%.1s on #! line",s);
1762 /* compliments of Tom Christiansen */
1764 /* unexec() can be found in the Gnu emacs distribution */
1765 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
1776 prog = newSVpv(BIN_EXP, 0);
1777 sv_catpv(prog, "/perl");
1778 file = newSVpv(origfilename, 0);
1779 sv_catpv(file, ".perldump");
1781 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1782 /* unexec prints msg to stderr in case of failure */
1783 PerlProc_exit(status);
1786 # include <lib$routines.h>
1787 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1789 ABORT(); /* for use with undump */
1794 /* initialize curinterp */
1799 #ifdef PERL_OBJECT /* XXX kludge */
1804 curcop = &compiling; \
1809 laststype = OP_STAT; \
1811 maxsysfd = MAXSYSFD; \
1812 statname = Nullsv; \
1818 laststype = OP_STAT; \
1825 in_clean_objs = FALSE; \
1826 in_clean_all= FALSE; \
1827 profiledata = NULL; \
1829 rsfp_filters= Nullav; \
1833 # ifdef MULTIPLICITY
1834 # define PERLVAR(var,type)
1835 # define PERLVARI(var,type,init) curinterp->var = init;
1836 # define PERLVARIC(var,type,init) curinterp->var = init;
1837 # include "intrpvar.h"
1838 # ifndef USE_THREADS
1839 # include "thrdvar.h"
1845 # define PERLVAR(var,type)
1846 # define PERLVARI(var,type,init) var = init;
1847 # define PERLVARIC(var,type,init) var = init;
1848 # include "intrpvar.h"
1849 # ifndef USE_THREADS
1850 # include "thrdvar.h"
1861 init_main_stash(void)
1866 /* Note that strtab is a rather special HV. Assumptions are made
1867 about not iterating on it, and not adding tie magic to it.
1868 It is properly deallocated in perl_destruct() */
1870 HvSHAREKEYS_off(strtab); /* mandatory */
1871 hv_ksplit(strtab, 512);
1873 curstash = defstash = newHV();
1874 curstname = newSVpv("main",4);
1875 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1876 SvREFCNT_dec(GvHV(gv));
1877 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1879 HvNAME(defstash) = savepv("main");
1880 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1882 hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
1884 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1885 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1887 replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
1889 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1890 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1891 sv_setpvn(ERRSV, "", 0);
1892 curstash = defstash;
1893 compiling.cop_stash = defstash;
1894 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1895 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1896 /* We must init $/ before switches are processed. */
1897 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1901 open_script(char *scriptname, bool dosearch, SV *sv, int *fdscript)
1909 origfilename = savepv("-e");
1912 /* if find_script() returns, it returns a malloc()-ed value */
1913 origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
1915 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1916 char *s = scriptname + 8;
1917 *fdscript = atoi(s);
1921 scriptname = savepv(s + 1);
1922 Safefree(origfilename);
1923 origfilename = scriptname;
1928 curcop->cop_filegv = gv_fetchfile(origfilename);
1929 if (strEQ(origfilename,"-"))
1931 if (*fdscript >= 0) {
1932 rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1933 #if defined(HAS_FCNTL) && defined(F_SETFD)
1935 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1938 else if (preprocess) {
1939 char *cpp_cfg = CPPSTDIN;
1940 SV *cpp = newSVpv("",0);
1941 SV *cmd = NEWSV(0,0);
1943 if (strEQ(cpp_cfg, "cppstdin"))
1944 sv_catpvf(cpp, "%s/", BIN_EXP);
1945 sv_catpv(cpp, cpp_cfg);
1948 sv_catpv(sv,PRIVLIB_EXP);
1952 sed %s -e \"/^[^#]/b\" \
1953 -e \"/^#[ ]*include[ ]/b\" \
1954 -e \"/^#[ ]*define[ ]/b\" \
1955 -e \"/^#[ ]*if[ ]/b\" \
1956 -e \"/^#[ ]*ifdef[ ]/b\" \
1957 -e \"/^#[ ]*ifndef[ ]/b\" \
1958 -e \"/^#[ ]*else/b\" \
1959 -e \"/^#[ ]*elif[ ]/b\" \
1960 -e \"/^#[ ]*undef[ ]/b\" \
1961 -e \"/^#[ ]*endif/b\" \
1964 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1967 %s %s -e '/^[^#]/b' \
1968 -e '/^#[ ]*include[ ]/b' \
1969 -e '/^#[ ]*define[ ]/b' \
1970 -e '/^#[ ]*if[ ]/b' \
1971 -e '/^#[ ]*ifdef[ ]/b' \
1972 -e '/^#[ ]*ifndef[ ]/b' \
1973 -e '/^#[ ]*else/b' \
1974 -e '/^#[ ]*elif[ ]/b' \
1975 -e '/^#[ ]*undef[ ]/b' \
1976 -e '/^#[ ]*endif/b' \
1984 (doextract ? "-e '1,/^#/d\n'" : ""),
1986 scriptname, cpp, sv, CPPMINUS);
1988 #ifdef IAMSUID /* actually, this is caught earlier */
1989 if (euid != uid && !euid) { /* if running suidperl */
1991 (void)seteuid(uid); /* musn't stay setuid root */
1994 (void)setreuid((Uid_t)-1, uid);
1996 #ifdef HAS_SETRESUID
1997 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
1999 PerlProc_setuid(uid);
2003 if (PerlProc_geteuid() != uid)
2004 croak("Can't do seteuid!\n");
2006 #endif /* IAMSUID */
2007 rsfp = PerlProc_popen(SvPVX(cmd), "r");
2011 else if (!*scriptname) {
2012 forbid_setid("program input from stdin");
2013 rsfp = PerlIO_stdin();
2016 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2017 #if defined(HAS_FCNTL) && defined(F_SETFD)
2019 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2024 #ifndef IAMSUID /* in case script is not readable before setuid */
2025 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2026 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2028 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2029 croak("Can't do setuid\n");
2033 croak("Can't open perl script \"%s\": %s\n",
2034 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2039 validate_suid(char *validarg, char *scriptname, int fdscript)
2043 /* do we need to emulate setuid on scripts? */
2045 /* This code is for those BSD systems that have setuid #! scripts disabled
2046 * in the kernel because of a security problem. Merely defining DOSUID
2047 * in perl will not fix that problem, but if you have disabled setuid
2048 * scripts in the kernel, this will attempt to emulate setuid and setgid
2049 * on scripts that have those now-otherwise-useless bits set. The setuid
2050 * root version must be called suidperl or sperlN.NNN. If regular perl
2051 * discovers that it has opened a setuid script, it calls suidperl with
2052 * the same argv that it had. If suidperl finds that the script it has
2053 * just opened is NOT setuid root, it sets the effective uid back to the
2054 * uid. We don't just make perl setuid root because that loses the
2055 * effective uid we had before invoking perl, if it was different from the
2058 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2059 * be defined in suidperl only. suidperl must be setuid root. The
2060 * Configure script will set this up for you if you want it.
2067 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2068 croak("Can't stat script \"%s\"",origfilename);
2069 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2073 #ifndef HAS_SETREUID
2074 /* On this access check to make sure the directories are readable,
2075 * there is actually a small window that the user could use to make
2076 * filename point to an accessible directory. So there is a faint
2077 * chance that someone could execute a setuid script down in a
2078 * non-accessible directory. I don't know what to do about that.
2079 * But I don't think it's too important. The manual lies when
2080 * it says access() is useful in setuid programs.
2082 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2083 croak("Permission denied");
2085 /* If we can swap euid and uid, then we can determine access rights
2086 * with a simple stat of the file, and then compare device and
2087 * inode to make sure we did stat() on the same file we opened.
2088 * Then we just have to make sure he or she can execute it.
2091 struct stat tmpstatbuf;
2095 setreuid(euid,uid) < 0
2098 setresuid(euid,uid,(Uid_t)-1) < 0
2101 || PerlProc_getuid() != euid || PerlProc_geteuid() != uid)
2102 croak("Can't swap uid and euid"); /* really paranoid */
2103 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2104 croak("Permission denied"); /* testing full pathname here */
2105 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2106 tmpstatbuf.st_ino != statbuf.st_ino) {
2107 (void)PerlIO_close(rsfp);
2108 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2110 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2111 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2112 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2113 (long)statbuf.st_dev, (long)statbuf.st_ino,
2114 SvPVX(GvSV(curcop->cop_filegv)),
2115 (long)statbuf.st_uid, (long)statbuf.st_gid);
2116 (void)PerlProc_pclose(rsfp);
2118 croak("Permission denied\n");
2122 setreuid(uid,euid) < 0
2124 # if defined(HAS_SETRESUID)
2125 setresuid(uid,euid,(Uid_t)-1) < 0
2128 || PerlProc_getuid() != uid || PerlProc_geteuid() != euid)
2129 croak("Can't reswap uid and euid");
2130 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2131 croak("Permission denied\n");
2133 #endif /* HAS_SETREUID */
2134 #endif /* IAMSUID */
2136 if (!S_ISREG(statbuf.st_mode))
2137 croak("Permission denied");
2138 if (statbuf.st_mode & S_IWOTH)
2139 croak("Setuid/gid script is writable by world");
2140 doswitches = FALSE; /* -s is insecure in suid */
2142 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2143 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2144 croak("No #! line");
2145 s = SvPV(linestr,na)+2;
2147 while (!isSPACE(*s)) s++;
2148 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2149 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2150 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2151 croak("Not a perl script");
2152 while (*s == ' ' || *s == '\t') s++;
2154 * #! arg must be what we saw above. They can invoke it by
2155 * mentioning suidperl explicitly, but they may not add any strange
2156 * arguments beyond what #! says if they do invoke suidperl that way.
2158 len = strlen(validarg);
2159 if (strEQ(validarg," PHOOEY ") ||
2160 strnNE(s,validarg,len) || !isSPACE(s[len]))
2161 croak("Args must match #! line");
2164 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2165 euid == statbuf.st_uid)
2167 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2168 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2169 #endif /* IAMSUID */
2171 if (euid) { /* oops, we're not the setuid root perl */
2172 (void)PerlIO_close(rsfp);
2175 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2177 croak("Can't do setuid\n");
2180 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2182 (void)setegid(statbuf.st_gid);
2185 (void)setregid((Gid_t)-1,statbuf.st_gid);
2187 #ifdef HAS_SETRESGID
2188 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2190 PerlProc_setgid(statbuf.st_gid);
2194 if (PerlProc_getegid() != statbuf.st_gid)
2195 croak("Can't do setegid!\n");
2197 if (statbuf.st_mode & S_ISUID) {
2198 if (statbuf.st_uid != euid)
2200 (void)seteuid(statbuf.st_uid); /* all that for this */
2203 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2205 #ifdef HAS_SETRESUID
2206 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2208 PerlProc_setuid(statbuf.st_uid);
2212 if (PerlProc_geteuid() != statbuf.st_uid)
2213 croak("Can't do seteuid!\n");
2215 else if (uid) { /* oops, mustn't run as root */
2217 (void)seteuid((Uid_t)uid);
2220 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2222 #ifdef HAS_SETRESUID
2223 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2225 PerlProc_setuid((Uid_t)uid);
2229 if (PerlProc_geteuid() != uid)
2230 croak("Can't do seteuid!\n");
2233 if (!cando(S_IXUSR,TRUE,&statbuf))
2234 croak("Permission denied\n"); /* they can't do this */
2237 else if (preprocess)
2238 croak("-P not allowed for setuid/setgid script\n");
2239 else if (fdscript >= 0)
2240 croak("fd script not allowed in suidperl\n");
2242 croak("Script is not setuid/setgid in suidperl\n");
2244 /* We absolutely must clear out any saved ids here, so we */
2245 /* exec the real perl, substituting fd script for scriptname. */
2246 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2247 PerlIO_rewind(rsfp);
2248 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2249 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2250 if (!origargv[which])
2251 croak("Permission denied");
2252 origargv[which] = savepv(form("/dev/fd/%d/%s",
2253 PerlIO_fileno(rsfp), origargv[which]));
2254 #if defined(HAS_FCNTL) && defined(F_SETFD)
2255 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2257 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2258 croak("Can't do setuid\n");
2259 #endif /* IAMSUID */
2261 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2262 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2264 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2265 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2267 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2270 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2271 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2272 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2273 /* not set-id, must be wrapped */
2279 find_beginning(void)
2281 register char *s, *s2;
2283 /* skip forward in input to the real script? */
2287 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2288 croak("No Perl script found in input\n");
2289 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2290 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2292 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2294 while (*s == ' ' || *s == '\t') s++;
2296 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2297 if (strnEQ(s2-4,"perl",4))
2299 while (s = moreswitches(s)) ;
2301 if (cddir && PerlDir_chdir(cddir) < 0)
2302 croak("Can't chdir to %s",cddir);
2311 uid = (int)PerlProc_getuid();
2312 euid = (int)PerlProc_geteuid();
2313 gid = (int)PerlProc_getgid();
2314 egid = (int)PerlProc_getegid();
2319 tainting |= (uid && (euid != uid || egid != gid));
2323 forbid_setid(char *s)
2326 croak("No %s allowed while running setuid", s);
2328 croak("No %s allowed while running setgid", s);
2335 curstash = debstash;
2336 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2338 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2339 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2340 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2341 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2342 sv_setiv(DBsingle, 0);
2343 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2344 sv_setiv(DBtrace, 0);
2345 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2346 sv_setiv(DBsignal, 0);
2347 curstash = defstash;
2350 #ifndef STRESS_REALLOC
2351 #define REASONABLE(size) (size)
2353 #define REASONABLE(size) (1) /* unreasonable */
2357 init_stacks(ARGSproto)
2359 /* start with 128-item stack and 8K cxstack */
2360 curstackinfo = new_stackinfo(REASONABLE(128),
2361 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
2362 curstackinfo->si_type = PERLSI_MAIN;
2363 curstack = curstackinfo->si_stack;
2364 mainstack = curstack; /* remember in case we switch stacks */
2366 stack_base = AvARRAY(curstack);
2367 stack_sp = stack_base;
2368 stack_max = stack_base + AvMAX(curstack);
2370 New(50,tmps_stack,REASONABLE(128),SV*);
2373 tmps_max = REASONABLE(128);
2375 New(54,markstack,REASONABLE(32),I32);
2376 markstack_ptr = markstack;
2377 markstack_max = markstack + REASONABLE(32);
2381 New(54,scopestack,REASONABLE(32),I32);
2383 scopestack_max = REASONABLE(32);
2385 New(54,savestack,REASONABLE(128),ANY);
2387 savestack_max = REASONABLE(128);
2389 New(54,retstack,REASONABLE(16),OP*);
2391 retstack_max = REASONABLE(16);
2400 while (curstackinfo->si_next)
2401 curstackinfo = curstackinfo->si_next;
2402 while (curstackinfo) {
2403 PERL_SI *p = curstackinfo->si_prev;
2404 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
2405 Safefree(curstackinfo->si_cxstack);
2406 Safefree(curstackinfo);
2409 Safefree(tmps_stack);
2410 Safefree(markstack);
2411 Safefree(scopestack);
2412 Safefree(savestack);
2421 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2434 subname = newSVpv("main",4);
2438 init_predump_symbols(void)
2444 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2445 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2446 GvMULTI_on(stdingv);
2447 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2448 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2450 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2452 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2454 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2456 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2458 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2460 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2461 GvMULTI_on(othergv);
2462 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2463 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2465 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2467 statname = NEWSV(66,0); /* last filename we did stat on */
2470 osname = savepv(OSNAME);
2474 init_postdump_symbols(register int argc, register char **argv, register char **env)
2481 argc--,argv++; /* skip name of script */
2483 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2486 if (argv[0][1] == '-') {
2490 if (s = strchr(argv[0], '=')) {
2492 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2495 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2498 toptarget = NEWSV(0,0);
2499 sv_upgrade(toptarget, SVt_PVFM);
2500 sv_setpvn(toptarget, "", 0);
2501 bodytarget = NEWSV(0,0);
2502 sv_upgrade(bodytarget, SVt_PVFM);
2503 sv_setpvn(bodytarget, "", 0);
2504 formtarget = bodytarget;
2507 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2508 sv_setpv(GvSV(tmpgv),origfilename);
2509 magicname("0", "0", 1);
2511 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2512 sv_setpv(GvSV(tmpgv),origargv[0]);
2513 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2515 (void)gv_AVadd(argvgv);
2516 av_clear(GvAVn(argvgv));
2517 for (; argc > 0; argc--,argv++) {
2518 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2521 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2525 hv_magic(hv, envgv, 'E');
2526 #ifndef VMS /* VMS doesn't have environ array */
2527 /* Note that if the supplied env parameter is actually a copy
2528 of the global environ then it may now point to free'd memory
2529 if the environment has been modified since. To avoid this
2530 problem we treat env==NULL as meaning 'use the default'
2535 environ[0] = Nullch;
2536 for (; *env; env++) {
2537 if (!(s = strchr(*env,'=')))
2543 sv = newSVpv(s--,0);
2544 (void)hv_store(hv, *env, s - *env, sv, 0);
2546 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2547 /* Sins of the RTL. See note in my_setenv(). */
2548 (void)PerlEnv_putenv(savepv(*env));
2552 #ifdef DYNAMIC_ENV_FETCH
2553 HvNAME(hv) = savepv(ENV_HV_NAME);
2557 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2558 sv_setiv(GvSV(tmpgv), (IV)getpid());
2567 s = PerlEnv_getenv("PERL5LIB");
2571 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2573 /* Treat PERL5?LIB as a possible search list logical name -- the
2574 * "natural" VMS idiom for a Unix path string. We allow each
2575 * element to be a set of |-separated directories for compatibility.
2579 if (my_trnlnm("PERL5LIB",buf,0))
2580 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2582 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2586 /* Use the ~-expanded versions of APPLLIB (undocumented),
2587 ARCHLIB PRIVLIB SITEARCH and SITELIB
2590 incpush(APPLLIB_EXP, TRUE);
2594 incpush(ARCHLIB_EXP, FALSE);
2597 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2600 incpush(PRIVLIB_EXP, TRUE);
2602 incpush(PRIVLIB_EXP, FALSE);
2606 incpush(SITEARCH_EXP, FALSE);
2610 incpush(SITELIB_EXP, TRUE);
2612 incpush(SITELIB_EXP, FALSE);
2616 incpush(".", FALSE);
2620 # define PERLLIB_SEP ';'
2623 # define PERLLIB_SEP '|'
2625 # define PERLLIB_SEP ':'
2628 #ifndef PERLLIB_MANGLE
2629 # define PERLLIB_MANGLE(s,n) (s)
2633 incpush(char *p, int addsubdirs)
2635 SV *subdir = Nullsv;
2641 subdir = sv_newmortal();
2642 if (!archpat_auto) {
2643 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2644 + sizeof("//auto"));
2645 New(55, archpat_auto, len, char);
2646 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2648 for (len = sizeof(ARCHNAME) + 2;
2649 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2650 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2655 /* Break at all separators */
2657 SV *libdir = NEWSV(55,0);
2660 /* skip any consecutive separators */
2661 while ( *p == PERLLIB_SEP ) {
2662 /* Uncomment the next line for PATH semantics */
2663 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2667 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2668 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2673 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2674 p = Nullch; /* break out */
2678 * BEFORE pushing libdir onto @INC we may first push version- and
2679 * archname-specific sub-directories.
2682 struct stat tmpstatbuf;
2687 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2689 while (unix[len-1] == '/') len--; /* Cosmetic */
2690 sv_usepvn(libdir,unix,len);
2693 PerlIO_printf(PerlIO_stderr(),
2694 "Failed to unixify @INC element \"%s\"\n",
2697 /* .../archname/version if -d .../archname/version/auto */
2698 sv_setsv(subdir, libdir);
2699 sv_catpv(subdir, archpat_auto);
2700 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2701 S_ISDIR(tmpstatbuf.st_mode))
2702 av_push(GvAVn(incgv),
2703 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2705 /* .../archname if -d .../archname/auto */
2706 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2707 strlen(patchlevel) + 1, "", 0);
2708 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2709 S_ISDIR(tmpstatbuf.st_mode))
2710 av_push(GvAVn(incgv),
2711 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2714 /* finally push this lib directory on the end of @INC */
2715 av_push(GvAVn(incgv), libdir);
2720 STATIC struct perl_thread *
2723 struct perl_thread *thr;
2726 Newz(53, thr, 1, struct perl_thread);
2727 curcop = &compiling;
2728 thr->cvcache = newHV();
2729 thr->threadsv = newAV();
2730 /* thr->threadsvp is set when find_threadsv is called */
2731 thr->specific = newAV();
2732 thr->errhv = newHV();
2733 thr->flags = THRf_R_JOINABLE;
2734 MUTEX_INIT(&thr->mutex);
2735 /* Handcraft thrsv similarly to mess_sv */
2736 New(53, thrsv, 1, SV);
2737 Newz(53, xpv, 1, XPV);
2738 SvFLAGS(thrsv) = SVt_PV;
2739 SvANY(thrsv) = (void*)xpv;
2740 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2741 SvPVX(thrsv) = (char*)thr;
2742 SvCUR_set(thrsv, sizeof(thr));
2743 SvLEN_set(thrsv, sizeof(thr));
2744 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2748 MUTEX_LOCK(&threads_mutex);
2753 MUTEX_UNLOCK(&threads_mutex);
2755 #ifdef HAVE_THREAD_INTERN
2756 init_thread_intern(thr);
2759 #ifdef SET_THREAD_SELF
2760 SET_THREAD_SELF(thr);
2762 thr->self = pthread_self();
2763 #endif /* SET_THREAD_SELF */
2767 * These must come after the SET_THR because sv_setpvn does
2768 * SvTAINT and the taint fields require dTHR.
2770 toptarget = NEWSV(0,0);
2771 sv_upgrade(toptarget, SVt_PVFM);
2772 sv_setpvn(toptarget, "", 0);
2773 bodytarget = NEWSV(0,0);
2774 sv_upgrade(bodytarget, SVt_PVFM);
2775 sv_setpvn(bodytarget, "", 0);
2776 formtarget = bodytarget;
2777 thr->errsv = newSVpv("", 0);
2778 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2781 #endif /* USE_THREADS */
2784 call_list(I32 oldscope, AV *paramList)
2787 line_t oldline = curcop->cop_line;
2792 while (AvFILL(paramList) >= 0) {
2793 CV *cv = (CV*)av_shift(paramList);
2802 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2803 (void)SvPV(atsv, len);
2806 curcop = &compiling;
2807 curcop->cop_line = oldline;
2808 if (paramList == beginav)
2809 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2811 sv_catpv(atsv, "END failed--cleanup aborted");
2812 while (scopestack_ix > oldscope)
2814 croak("%s", SvPVX(atsv));
2822 /* my_exit() was called */
2823 while (scopestack_ix > oldscope)
2826 curstash = defstash;
2828 call_list(oldscope, endav);
2830 curcop = &compiling;
2831 curcop->cop_line = oldline;
2833 if (paramList == beginav)
2834 croak("BEGIN failed--compilation aborted");
2836 croak("END failed--cleanup aborted");
2842 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2847 curcop = &compiling;
2848 curcop->cop_line = oldline;
2861 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2862 thr, (unsigned long) status));
2863 #endif /* USE_THREADS */
2872 STATUS_NATIVE_SET(status);
2879 my_failure_exit(void)
2882 if (vaxc$errno & 1) {
2883 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2884 STATUS_NATIVE_SET(44);
2887 if (!vaxc$errno && errno) /* unlikely */
2888 STATUS_NATIVE_SET(44);
2890 STATUS_NATIVE_SET(vaxc$errno);
2895 STATUS_POSIX_SET(errno);
2897 exitstatus = STATUS_POSIX >> 8;
2898 if (exitstatus & 255)
2899 STATUS_POSIX_SET(exitstatus);
2901 STATUS_POSIX_SET(255);
2911 register PERL_CONTEXT *cx;
2916 SvREFCNT_dec(e_script);
2920 POPSTACK_TO(mainstack);
2921 if (cxstack_ix >= 0) {
2936 read_e_script(CPerlObj *pPerl, int idx, SV *buf_sv, int maxlen)
2938 read_e_script(int idx, SV *buf_sv, int maxlen)
2942 p = SvPVX(e_script);
2943 nl = strchr(p, '\n');
2944 nl = (nl) ? nl+1 : SvEND(e_script);
2947 sv_catpvn(buf_sv, p, nl-p);
2948 sv_chop(e_script, nl);