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");
1722 printf("BeOS port Copyright Tom Spindler, 1997-1998\n");
1724 #ifdef BINARY_BUILD_NOTICE
1725 BINARY_BUILD_NOTICE;
1728 Perl may be copied only under the terms of either the Artistic License or the\n\
1729 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\
1730 Complete documentation for Perl, including FAQ lists, should be found on\n\
1731 this system using `man perl' or `perldoc perl'. If you have access to the\n\
1732 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
1740 if (s[1] == '-') /* Additional switches on #! line. */
1751 #ifdef ALTERNATE_SHEBANG
1752 case 'S': /* OS/2 needs -S on "extproc" line. */
1760 croak("Can't emulate -%.1s on #! line",s);
1765 /* compliments of Tom Christiansen */
1767 /* unexec() can be found in the Gnu emacs distribution */
1768 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
1779 prog = newSVpv(BIN_EXP, 0);
1780 sv_catpv(prog, "/perl");
1781 file = newSVpv(origfilename, 0);
1782 sv_catpv(file, ".perldump");
1784 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1785 /* unexec prints msg to stderr in case of failure */
1786 PerlProc_exit(status);
1789 # include <lib$routines.h>
1790 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1792 ABORT(); /* for use with undump */
1797 /* initialize curinterp */
1802 #ifdef PERL_OBJECT /* XXX kludge */
1807 curcop = &compiling; \
1812 laststype = OP_STAT; \
1814 maxsysfd = MAXSYSFD; \
1815 statname = Nullsv; \
1821 laststype = OP_STAT; \
1828 in_clean_objs = FALSE; \
1829 in_clean_all= FALSE; \
1830 profiledata = NULL; \
1832 rsfp_filters= Nullav; \
1836 # ifdef MULTIPLICITY
1837 # define PERLVAR(var,type)
1838 # define PERLVARI(var,type,init) curinterp->var = init;
1839 # define PERLVARIC(var,type,init) curinterp->var = init;
1840 # include "intrpvar.h"
1841 # ifndef USE_THREADS
1842 # include "thrdvar.h"
1848 # define PERLVAR(var,type)
1849 # define PERLVARI(var,type,init) var = init;
1850 # define PERLVARIC(var,type,init) var = init;
1851 # include "intrpvar.h"
1852 # ifndef USE_THREADS
1853 # include "thrdvar.h"
1864 init_main_stash(void)
1869 /* Note that strtab is a rather special HV. Assumptions are made
1870 about not iterating on it, and not adding tie magic to it.
1871 It is properly deallocated in perl_destruct() */
1873 HvSHAREKEYS_off(strtab); /* mandatory */
1874 hv_ksplit(strtab, 512);
1876 curstash = defstash = newHV();
1877 curstname = newSVpv("main",4);
1878 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1879 SvREFCNT_dec(GvHV(gv));
1880 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1882 HvNAME(defstash) = savepv("main");
1883 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1885 hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
1887 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1888 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1890 replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
1892 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1893 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1894 sv_setpvn(ERRSV, "", 0);
1895 curstash = defstash;
1896 compiling.cop_stash = defstash;
1897 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1898 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1899 /* We must init $/ before switches are processed. */
1900 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1904 open_script(char *scriptname, bool dosearch, SV *sv, int *fdscript)
1912 origfilename = savepv("-e");
1915 /* if find_script() returns, it returns a malloc()-ed value */
1916 origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1);
1918 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1919 char *s = scriptname + 8;
1920 *fdscript = atoi(s);
1924 scriptname = savepv(s + 1);
1925 Safefree(origfilename);
1926 origfilename = scriptname;
1931 curcop->cop_filegv = gv_fetchfile(origfilename);
1932 if (strEQ(origfilename,"-"))
1934 if (*fdscript >= 0) {
1935 rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1936 #if defined(HAS_FCNTL) && defined(F_SETFD)
1938 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1941 else if (preprocess) {
1942 char *cpp_cfg = CPPSTDIN;
1943 SV *cpp = newSVpv("",0);
1944 SV *cmd = NEWSV(0,0);
1946 if (strEQ(cpp_cfg, "cppstdin"))
1947 sv_catpvf(cpp, "%s/", BIN_EXP);
1948 sv_catpv(cpp, cpp_cfg);
1951 sv_catpv(sv,PRIVLIB_EXP);
1955 sed %s -e \"/^[^#]/b\" \
1956 -e \"/^#[ ]*include[ ]/b\" \
1957 -e \"/^#[ ]*define[ ]/b\" \
1958 -e \"/^#[ ]*if[ ]/b\" \
1959 -e \"/^#[ ]*ifdef[ ]/b\" \
1960 -e \"/^#[ ]*ifndef[ ]/b\" \
1961 -e \"/^#[ ]*else/b\" \
1962 -e \"/^#[ ]*elif[ ]/b\" \
1963 -e \"/^#[ ]*undef[ ]/b\" \
1964 -e \"/^#[ ]*endif/b\" \
1967 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1970 %s %s -e '/^[^#]/b' \
1971 -e '/^#[ ]*include[ ]/b' \
1972 -e '/^#[ ]*define[ ]/b' \
1973 -e '/^#[ ]*if[ ]/b' \
1974 -e '/^#[ ]*ifdef[ ]/b' \
1975 -e '/^#[ ]*ifndef[ ]/b' \
1976 -e '/^#[ ]*else/b' \
1977 -e '/^#[ ]*elif[ ]/b' \
1978 -e '/^#[ ]*undef[ ]/b' \
1979 -e '/^#[ ]*endif/b' \
1987 (doextract ? "-e '1,/^#/d\n'" : ""),
1989 scriptname, cpp, sv, CPPMINUS);
1991 #ifdef IAMSUID /* actually, this is caught earlier */
1992 if (euid != uid && !euid) { /* if running suidperl */
1994 (void)seteuid(uid); /* musn't stay setuid root */
1997 (void)setreuid((Uid_t)-1, uid);
1999 #ifdef HAS_SETRESUID
2000 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
2002 PerlProc_setuid(uid);
2006 if (PerlProc_geteuid() != uid)
2007 croak("Can't do seteuid!\n");
2009 #endif /* IAMSUID */
2010 rsfp = PerlProc_popen(SvPVX(cmd), "r");
2014 else if (!*scriptname) {
2015 forbid_setid("program input from stdin");
2016 rsfp = PerlIO_stdin();
2019 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2020 #if defined(HAS_FCNTL) && defined(F_SETFD)
2022 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2027 #ifndef IAMSUID /* in case script is not readable before setuid */
2028 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2029 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2031 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2032 croak("Can't do setuid\n");
2036 croak("Can't open perl script \"%s\": %s\n",
2037 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2042 validate_suid(char *validarg, char *scriptname, int fdscript)
2046 /* do we need to emulate setuid on scripts? */
2048 /* This code is for those BSD systems that have setuid #! scripts disabled
2049 * in the kernel because of a security problem. Merely defining DOSUID
2050 * in perl will not fix that problem, but if you have disabled setuid
2051 * scripts in the kernel, this will attempt to emulate setuid and setgid
2052 * on scripts that have those now-otherwise-useless bits set. The setuid
2053 * root version must be called suidperl or sperlN.NNN. If regular perl
2054 * discovers that it has opened a setuid script, it calls suidperl with
2055 * the same argv that it had. If suidperl finds that the script it has
2056 * just opened is NOT setuid root, it sets the effective uid back to the
2057 * uid. We don't just make perl setuid root because that loses the
2058 * effective uid we had before invoking perl, if it was different from the
2061 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2062 * be defined in suidperl only. suidperl must be setuid root. The
2063 * Configure script will set this up for you if you want it.
2070 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2071 croak("Can't stat script \"%s\"",origfilename);
2072 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2076 #ifndef HAS_SETREUID
2077 /* On this access check to make sure the directories are readable,
2078 * there is actually a small window that the user could use to make
2079 * filename point to an accessible directory. So there is a faint
2080 * chance that someone could execute a setuid script down in a
2081 * non-accessible directory. I don't know what to do about that.
2082 * But I don't think it's too important. The manual lies when
2083 * it says access() is useful in setuid programs.
2085 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2086 croak("Permission denied");
2088 /* If we can swap euid and uid, then we can determine access rights
2089 * with a simple stat of the file, and then compare device and
2090 * inode to make sure we did stat() on the same file we opened.
2091 * Then we just have to make sure he or she can execute it.
2094 struct stat tmpstatbuf;
2098 setreuid(euid,uid) < 0
2101 setresuid(euid,uid,(Uid_t)-1) < 0
2104 || PerlProc_getuid() != euid || PerlProc_geteuid() != uid)
2105 croak("Can't swap uid and euid"); /* really paranoid */
2106 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2107 croak("Permission denied"); /* testing full pathname here */
2108 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2109 tmpstatbuf.st_ino != statbuf.st_ino) {
2110 (void)PerlIO_close(rsfp);
2111 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2113 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2114 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2115 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2116 (long)statbuf.st_dev, (long)statbuf.st_ino,
2117 SvPVX(GvSV(curcop->cop_filegv)),
2118 (long)statbuf.st_uid, (long)statbuf.st_gid);
2119 (void)PerlProc_pclose(rsfp);
2121 croak("Permission denied\n");
2125 setreuid(uid,euid) < 0
2127 # if defined(HAS_SETRESUID)
2128 setresuid(uid,euid,(Uid_t)-1) < 0
2131 || PerlProc_getuid() != uid || PerlProc_geteuid() != euid)
2132 croak("Can't reswap uid and euid");
2133 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2134 croak("Permission denied\n");
2136 #endif /* HAS_SETREUID */
2137 #endif /* IAMSUID */
2139 if (!S_ISREG(statbuf.st_mode))
2140 croak("Permission denied");
2141 if (statbuf.st_mode & S_IWOTH)
2142 croak("Setuid/gid script is writable by world");
2143 doswitches = FALSE; /* -s is insecure in suid */
2145 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2146 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2147 croak("No #! line");
2148 s = SvPV(linestr,na)+2;
2150 while (!isSPACE(*s)) s++;
2151 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2152 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2153 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2154 croak("Not a perl script");
2155 while (*s == ' ' || *s == '\t') s++;
2157 * #! arg must be what we saw above. They can invoke it by
2158 * mentioning suidperl explicitly, but they may not add any strange
2159 * arguments beyond what #! says if they do invoke suidperl that way.
2161 len = strlen(validarg);
2162 if (strEQ(validarg," PHOOEY ") ||
2163 strnNE(s,validarg,len) || !isSPACE(s[len]))
2164 croak("Args must match #! line");
2167 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2168 euid == statbuf.st_uid)
2170 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2171 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2172 #endif /* IAMSUID */
2174 if (euid) { /* oops, we're not the setuid root perl */
2175 (void)PerlIO_close(rsfp);
2178 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2180 croak("Can't do setuid\n");
2183 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2185 (void)setegid(statbuf.st_gid);
2188 (void)setregid((Gid_t)-1,statbuf.st_gid);
2190 #ifdef HAS_SETRESGID
2191 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2193 PerlProc_setgid(statbuf.st_gid);
2197 if (PerlProc_getegid() != statbuf.st_gid)
2198 croak("Can't do setegid!\n");
2200 if (statbuf.st_mode & S_ISUID) {
2201 if (statbuf.st_uid != euid)
2203 (void)seteuid(statbuf.st_uid); /* all that for this */
2206 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2208 #ifdef HAS_SETRESUID
2209 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2211 PerlProc_setuid(statbuf.st_uid);
2215 if (PerlProc_geteuid() != statbuf.st_uid)
2216 croak("Can't do seteuid!\n");
2218 else if (uid) { /* oops, mustn't run as root */
2220 (void)seteuid((Uid_t)uid);
2223 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2225 #ifdef HAS_SETRESUID
2226 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2228 PerlProc_setuid((Uid_t)uid);
2232 if (PerlProc_geteuid() != uid)
2233 croak("Can't do seteuid!\n");
2236 if (!cando(S_IXUSR,TRUE,&statbuf))
2237 croak("Permission denied\n"); /* they can't do this */
2240 else if (preprocess)
2241 croak("-P not allowed for setuid/setgid script\n");
2242 else if (fdscript >= 0)
2243 croak("fd script not allowed in suidperl\n");
2245 croak("Script is not setuid/setgid in suidperl\n");
2247 /* We absolutely must clear out any saved ids here, so we */
2248 /* exec the real perl, substituting fd script for scriptname. */
2249 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2250 PerlIO_rewind(rsfp);
2251 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2252 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2253 if (!origargv[which])
2254 croak("Permission denied");
2255 origargv[which] = savepv(form("/dev/fd/%d/%s",
2256 PerlIO_fileno(rsfp), origargv[which]));
2257 #if defined(HAS_FCNTL) && defined(F_SETFD)
2258 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2260 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2261 croak("Can't do setuid\n");
2262 #endif /* IAMSUID */
2264 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2265 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2267 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2268 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2270 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2273 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2274 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2275 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2276 /* not set-id, must be wrapped */
2282 find_beginning(void)
2284 register char *s, *s2;
2286 /* skip forward in input to the real script? */
2290 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2291 croak("No Perl script found in input\n");
2292 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2293 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2295 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2297 while (*s == ' ' || *s == '\t') s++;
2299 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2300 if (strnEQ(s2-4,"perl",4))
2302 while (s = moreswitches(s)) ;
2304 if (cddir && PerlDir_chdir(cddir) < 0)
2305 croak("Can't chdir to %s",cddir);
2314 uid = (int)PerlProc_getuid();
2315 euid = (int)PerlProc_geteuid();
2316 gid = (int)PerlProc_getgid();
2317 egid = (int)PerlProc_getegid();
2322 tainting |= (uid && (euid != uid || egid != gid));
2326 forbid_setid(char *s)
2329 croak("No %s allowed while running setuid", s);
2331 croak("No %s allowed while running setgid", s);
2338 curstash = debstash;
2339 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2341 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2342 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2343 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2344 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2345 sv_setiv(DBsingle, 0);
2346 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2347 sv_setiv(DBtrace, 0);
2348 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2349 sv_setiv(DBsignal, 0);
2350 curstash = defstash;
2353 #ifndef STRESS_REALLOC
2354 #define REASONABLE(size) (size)
2356 #define REASONABLE(size) (1) /* unreasonable */
2360 init_stacks(ARGSproto)
2362 /* start with 128-item stack and 8K cxstack */
2363 curstackinfo = new_stackinfo(REASONABLE(128),
2364 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
2365 curstackinfo->si_type = PERLSI_MAIN;
2366 curstack = curstackinfo->si_stack;
2367 mainstack = curstack; /* remember in case we switch stacks */
2369 stack_base = AvARRAY(curstack);
2370 stack_sp = stack_base;
2371 stack_max = stack_base + AvMAX(curstack);
2373 New(50,tmps_stack,REASONABLE(128),SV*);
2376 tmps_max = REASONABLE(128);
2378 New(54,markstack,REASONABLE(32),I32);
2379 markstack_ptr = markstack;
2380 markstack_max = markstack + REASONABLE(32);
2384 New(54,scopestack,REASONABLE(32),I32);
2386 scopestack_max = REASONABLE(32);
2388 New(54,savestack,REASONABLE(128),ANY);
2390 savestack_max = REASONABLE(128);
2392 New(54,retstack,REASONABLE(16),OP*);
2394 retstack_max = REASONABLE(16);
2403 while (curstackinfo->si_next)
2404 curstackinfo = curstackinfo->si_next;
2405 while (curstackinfo) {
2406 PERL_SI *p = curstackinfo->si_prev;
2407 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
2408 Safefree(curstackinfo->si_cxstack);
2409 Safefree(curstackinfo);
2412 Safefree(tmps_stack);
2413 Safefree(markstack);
2414 Safefree(scopestack);
2415 Safefree(savestack);
2424 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2437 subname = newSVpv("main",4);
2441 init_predump_symbols(void)
2447 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2448 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2449 GvMULTI_on(stdingv);
2450 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2451 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2453 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2455 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2457 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2459 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2461 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2463 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2464 GvMULTI_on(othergv);
2465 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2466 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2468 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2470 statname = NEWSV(66,0); /* last filename we did stat on */
2473 osname = savepv(OSNAME);
2477 init_postdump_symbols(register int argc, register char **argv, register char **env)
2484 argc--,argv++; /* skip name of script */
2486 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2489 if (argv[0][1] == '-') {
2493 if (s = strchr(argv[0], '=')) {
2495 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2498 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2501 toptarget = NEWSV(0,0);
2502 sv_upgrade(toptarget, SVt_PVFM);
2503 sv_setpvn(toptarget, "", 0);
2504 bodytarget = NEWSV(0,0);
2505 sv_upgrade(bodytarget, SVt_PVFM);
2506 sv_setpvn(bodytarget, "", 0);
2507 formtarget = bodytarget;
2510 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2511 sv_setpv(GvSV(tmpgv),origfilename);
2512 magicname("0", "0", 1);
2514 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2515 sv_setpv(GvSV(tmpgv),origargv[0]);
2516 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2518 (void)gv_AVadd(argvgv);
2519 av_clear(GvAVn(argvgv));
2520 for (; argc > 0; argc--,argv++) {
2521 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2524 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2528 hv_magic(hv, envgv, 'E');
2529 #ifndef VMS /* VMS doesn't have environ array */
2530 /* Note that if the supplied env parameter is actually a copy
2531 of the global environ then it may now point to free'd memory
2532 if the environment has been modified since. To avoid this
2533 problem we treat env==NULL as meaning 'use the default'
2538 environ[0] = Nullch;
2539 for (; *env; env++) {
2540 if (!(s = strchr(*env,'=')))
2546 sv = newSVpv(s--,0);
2547 (void)hv_store(hv, *env, s - *env, sv, 0);
2549 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2550 /* Sins of the RTL. See note in my_setenv(). */
2551 (void)PerlEnv_putenv(savepv(*env));
2555 #ifdef DYNAMIC_ENV_FETCH
2556 HvNAME(hv) = savepv(ENV_HV_NAME);
2560 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2561 sv_setiv(GvSV(tmpgv), (IV)getpid());
2570 s = PerlEnv_getenv("PERL5LIB");
2574 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2576 /* Treat PERL5?LIB as a possible search list logical name -- the
2577 * "natural" VMS idiom for a Unix path string. We allow each
2578 * element to be a set of |-separated directories for compatibility.
2582 if (my_trnlnm("PERL5LIB",buf,0))
2583 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2585 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2589 /* Use the ~-expanded versions of APPLLIB (undocumented),
2590 ARCHLIB PRIVLIB SITEARCH and SITELIB
2593 incpush(APPLLIB_EXP, TRUE);
2597 incpush(ARCHLIB_EXP, FALSE);
2600 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2603 incpush(PRIVLIB_EXP, TRUE);
2605 incpush(PRIVLIB_EXP, FALSE);
2609 incpush(SITEARCH_EXP, FALSE);
2613 incpush(SITELIB_EXP, TRUE);
2615 incpush(SITELIB_EXP, FALSE);
2619 incpush(".", FALSE);
2623 # define PERLLIB_SEP ';'
2626 # define PERLLIB_SEP '|'
2628 # define PERLLIB_SEP ':'
2631 #ifndef PERLLIB_MANGLE
2632 # define PERLLIB_MANGLE(s,n) (s)
2636 incpush(char *p, int addsubdirs)
2638 SV *subdir = Nullsv;
2644 subdir = sv_newmortal();
2645 if (!archpat_auto) {
2646 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2647 + sizeof("//auto"));
2648 New(55, archpat_auto, len, char);
2649 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2651 for (len = sizeof(ARCHNAME) + 2;
2652 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2653 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2658 /* Break at all separators */
2660 SV *libdir = NEWSV(55,0);
2663 /* skip any consecutive separators */
2664 while ( *p == PERLLIB_SEP ) {
2665 /* Uncomment the next line for PATH semantics */
2666 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2670 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2671 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2676 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2677 p = Nullch; /* break out */
2681 * BEFORE pushing libdir onto @INC we may first push version- and
2682 * archname-specific sub-directories.
2685 struct stat tmpstatbuf;
2690 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2692 while (unix[len-1] == '/') len--; /* Cosmetic */
2693 sv_usepvn(libdir,unix,len);
2696 PerlIO_printf(PerlIO_stderr(),
2697 "Failed to unixify @INC element \"%s\"\n",
2700 /* .../archname/version if -d .../archname/version/auto */
2701 sv_setsv(subdir, libdir);
2702 sv_catpv(subdir, archpat_auto);
2703 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2704 S_ISDIR(tmpstatbuf.st_mode))
2705 av_push(GvAVn(incgv),
2706 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2708 /* .../archname if -d .../archname/auto */
2709 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2710 strlen(patchlevel) + 1, "", 0);
2711 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2712 S_ISDIR(tmpstatbuf.st_mode))
2713 av_push(GvAVn(incgv),
2714 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2717 /* finally push this lib directory on the end of @INC */
2718 av_push(GvAVn(incgv), libdir);
2723 STATIC struct perl_thread *
2726 struct perl_thread *thr;
2729 Newz(53, thr, 1, struct perl_thread);
2730 curcop = &compiling;
2731 thr->cvcache = newHV();
2732 thr->threadsv = newAV();
2733 /* thr->threadsvp is set when find_threadsv is called */
2734 thr->specific = newAV();
2735 thr->errhv = newHV();
2736 thr->flags = THRf_R_JOINABLE;
2737 MUTEX_INIT(&thr->mutex);
2738 /* Handcraft thrsv similarly to mess_sv */
2739 New(53, thrsv, 1, SV);
2740 Newz(53, xpv, 1, XPV);
2741 SvFLAGS(thrsv) = SVt_PV;
2742 SvANY(thrsv) = (void*)xpv;
2743 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2744 SvPVX(thrsv) = (char*)thr;
2745 SvCUR_set(thrsv, sizeof(thr));
2746 SvLEN_set(thrsv, sizeof(thr));
2747 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2751 MUTEX_LOCK(&threads_mutex);
2756 MUTEX_UNLOCK(&threads_mutex);
2758 #ifdef HAVE_THREAD_INTERN
2759 init_thread_intern(thr);
2762 #ifdef SET_THREAD_SELF
2763 SET_THREAD_SELF(thr);
2765 thr->self = pthread_self();
2766 #endif /* SET_THREAD_SELF */
2770 * These must come after the SET_THR because sv_setpvn does
2771 * SvTAINT and the taint fields require dTHR.
2773 toptarget = NEWSV(0,0);
2774 sv_upgrade(toptarget, SVt_PVFM);
2775 sv_setpvn(toptarget, "", 0);
2776 bodytarget = NEWSV(0,0);
2777 sv_upgrade(bodytarget, SVt_PVFM);
2778 sv_setpvn(bodytarget, "", 0);
2779 formtarget = bodytarget;
2780 thr->errsv = newSVpv("", 0);
2781 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2784 regcompp = FUNC_NAME_TO_PTR(pregcomp);
2785 regexecp = FUNC_NAME_TO_PTR(regexec_flags);
2791 #endif /* USE_THREADS */
2794 call_list(I32 oldscope, AV *paramList)
2797 line_t oldline = curcop->cop_line;
2802 while (AvFILL(paramList) >= 0) {
2803 CV *cv = (CV*)av_shift(paramList);
2812 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2813 (void)SvPV(atsv, len);
2816 curcop = &compiling;
2817 curcop->cop_line = oldline;
2818 if (paramList == beginav)
2819 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2821 sv_catpv(atsv, "END failed--cleanup aborted");
2822 while (scopestack_ix > oldscope)
2824 croak("%s", SvPVX(atsv));
2832 /* my_exit() was called */
2833 while (scopestack_ix > oldscope)
2836 curstash = defstash;
2838 call_list(oldscope, endav);
2840 curcop = &compiling;
2841 curcop->cop_line = oldline;
2843 if (paramList == beginav)
2844 croak("BEGIN failed--compilation aborted");
2846 croak("END failed--cleanup aborted");
2852 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2857 curcop = &compiling;
2858 curcop->cop_line = oldline;
2871 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2872 thr, (unsigned long) status));
2873 #endif /* USE_THREADS */
2882 STATUS_NATIVE_SET(status);
2889 my_failure_exit(void)
2892 if (vaxc$errno & 1) {
2893 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2894 STATUS_NATIVE_SET(44);
2897 if (!vaxc$errno && errno) /* unlikely */
2898 STATUS_NATIVE_SET(44);
2900 STATUS_NATIVE_SET(vaxc$errno);
2905 STATUS_POSIX_SET(errno);
2907 exitstatus = STATUS_POSIX >> 8;
2908 if (exitstatus & 255)
2909 STATUS_POSIX_SET(exitstatus);
2911 STATUS_POSIX_SET(255);
2921 register PERL_CONTEXT *cx;
2926 SvREFCNT_dec(e_script);
2930 POPSTACK_TO(mainstack);
2931 if (cxstack_ix >= 0) {
2946 read_e_script(CPerlObj *pPerl, int idx, SV *buf_sv, int maxlen)
2948 read_e_script(int idx, SV *buf_sv, int maxlen)
2952 p = SvPVX(e_script);
2953 nl = strchr(p, '\n');
2954 nl = (nl) ? nl+1 : SvEND(e_script);
2957 sv_catpvn(buf_sv, p, nl-p);
2958 sv_chop(e_script, nl);