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 SvREADONLY_on(&sv_undef);
154 SvREADONLY_on(&sv_no);
156 sv_setpv(&sv_yes,Yes);
158 SvREADONLY_on(&sv_yes);
161 nrs = newSVpv("\n", 1);
162 rs = SvREFCNT_inc(nrs);
166 /* sighandlerp = sighandler; */
168 sighandlerp = sighandler;
174 * There is no way we can refer to them from Perl so close them to save
175 * space. The other alternative would be to provide STDAUX and STDPRN
178 (void)fclose(stdaux);
179 (void)fclose(stdprn);
186 perl_destruct_level = 1;
188 if (perl_destruct_level > 0)
193 lex_state = LEX_NOTPARSING;
195 start_env.je_prev = NULL;
196 start_env.je_ret = -1;
197 start_env.je_mustcatch = TRUE;
198 top_env = &start_env;
201 SET_NUMERIC_STANDARD();
202 #if defined(SUBVERSION) && SUBVERSION > 0
203 sprintf(patchlevel, "%7.5f", (double) 5
204 + ((double) PATCHLEVEL / (double) 1000)
205 + ((double) SUBVERSION / (double) 100000));
207 sprintf(patchlevel, "%5.3f", (double) 5 +
208 ((double) PATCHLEVEL / (double) 1000));
211 #if defined(LOCAL_PATCH_COUNT)
212 localpatches = local_patches; /* For possible -v */
215 PerlIO_init(); /* Hook to IO system */
217 fdpid = newAV(); /* for remembering popen pids by fd */
218 modglobal = newHV(); /* pointers to per-interpreter module globals */
221 New(51,debname,128,char);
222 New(52,debdelim,128,char);
230 CPerlObj::perl_destruct(void)
232 perl_destruct(register PerlInterpreter *sv_interp)
236 int destruct_level; /* 0=none, 1=full, 2=full with checks */
241 #endif /* USE_THREADS */
244 if (!(curinterp = sv_interp))
250 /* Pass 1 on any remaining threads: detach joinables, join zombies */
252 MUTEX_LOCK(&threads_mutex);
253 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
254 "perl_destruct: waiting for %d threads...\n",
256 for (t = thr->next; t != thr; t = t->next) {
257 MUTEX_LOCK(&t->mutex);
258 switch (ThrSTATE(t)) {
261 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
262 "perl_destruct: joining zombie %p\n", t));
263 ThrSETSTATE(t, THRf_DEAD);
264 MUTEX_UNLOCK(&t->mutex);
267 * The SvREFCNT_dec below may take a long time (e.g. av
268 * may contain an object scalar whose destructor gets
269 * called) so we have to unlock threads_mutex and start
272 MUTEX_UNLOCK(&threads_mutex);
274 SvREFCNT_dec((SV*)av);
275 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
276 "perl_destruct: joined zombie %p OK\n", t));
278 case THRf_R_JOINABLE:
279 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
280 "perl_destruct: detaching thread %p\n", t));
281 ThrSETSTATE(t, THRf_R_DETACHED);
283 * We unlock threads_mutex and t->mutex in the opposite order
284 * from which we locked them just so that DETACH won't
285 * deadlock if it panics. It's only a breach of good style
286 * not a bug since they are unlocks not locks.
288 MUTEX_UNLOCK(&threads_mutex);
290 MUTEX_UNLOCK(&t->mutex);
293 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
294 "perl_destruct: ignoring %p (state %u)\n",
296 MUTEX_UNLOCK(&t->mutex);
297 /* fall through and out */
300 /* We leave the above "Pass 1" loop with threads_mutex still locked */
302 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
305 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
306 "perl_destruct: final wait for %d threads\n",
308 COND_WAIT(&nthreads_cond, &threads_mutex);
310 /* At this point, we're the last thread */
311 MUTEX_UNLOCK(&threads_mutex);
312 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
313 MUTEX_DESTROY(&threads_mutex);
314 COND_DESTROY(&nthreads_cond);
315 #endif /* !defined(FAKE_THREADS) */
316 #endif /* USE_THREADS */
318 destruct_level = perl_destruct_level;
322 if (s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL")) {
324 if (destruct_level < i)
337 /* We must account for everything. */
339 /* Destroy the main CV and syntax tree */
341 curpad = AvARRAY(comppad);
347 SvREFCNT_dec(main_cv);
352 * Try to destruct global references. We do this first so that the
353 * destructors and destructees still exist. Some sv's might remain.
354 * Non-referenced objects are on their own.
361 /* unhook hooks which will soon be, or use, destroyed data */
362 SvREFCNT_dec(warnhook);
364 SvREFCNT_dec(diehook);
366 SvREFCNT_dec(parsehook);
369 /* call exit list functions */
370 while (exitlistlen-- > 0)
371 exitlist[exitlistlen].fn(PERL_OBJECT_THIS_ exitlist[exitlistlen].ptr);
375 if (destruct_level == 0){
377 DEBUG_P(debprofdump());
379 /* The exit() function will do everything that needs doing. */
383 /* loosen bonds of global variables */
386 (void)PerlIO_close(rsfp);
390 /* Filters for program text */
391 SvREFCNT_dec(rsfp_filters);
392 rsfp_filters = Nullav;
404 sawampersand = FALSE; /* must save all match strings */
405 sawstudy = FALSE; /* do fbm_instr on all strings */
413 SvREFCNT_dec(e_script);
417 /* magical thingies */
419 Safefree(ofs); /* $, */
422 Safefree(ors); /* $\ */
425 SvREFCNT_dec(nrs); /* $\ helper */
428 multiline = 0; /* $* */
430 SvREFCNT_dec(statname);
434 /* defgv, aka *_ should be taken care of elsewhere */
436 /* clean up after study() */
437 SvREFCNT_dec(lastscream);
439 Safefree(screamfirst);
441 Safefree(screamnext);
444 /* startup and shutdown function lists */
445 SvREFCNT_dec(beginav);
447 SvREFCNT_dec(initav);
452 /* shortcuts just get cleared */
463 /* reset so print() ends up where we expect */
466 /* Prepare to destruct main symbol table. */
473 if (destruct_level >= 2) {
474 if (scopestack_ix != 0)
475 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
476 (long)scopestack_ix);
477 if (savestack_ix != 0)
478 warn("Unbalanced saves: %ld more saves than restores\n",
480 if (tmps_floor != -1)
481 warn("Unbalanced tmps: %ld more allocs than frees\n",
482 (long)tmps_floor + 1);
483 if (cxstack_ix != -1)
484 warn("Unbalanced context: %ld more PUSHes than POPs\n",
485 (long)cxstack_ix + 1);
488 /* Now absolutely destruct everything, somehow or other, loops or no. */
490 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
491 while (sv_count != 0 && sv_count != last_sv_count) {
492 last_sv_count = sv_count;
495 SvFLAGS(strtab) &= ~SVTYPEMASK;
496 SvFLAGS(strtab) |= SVt_PVHV;
498 /* Destruct the global string table. */
500 /* Yell and reset the HeVAL() slots that are still holding refcounts,
501 * so that sv_free() won't fail on them.
510 array = HvARRAY(strtab);
514 warn("Unbalanced string table refcount: (%d) for \"%s\"",
515 HeVAL(hent) - Nullsv, HeKEY(hent));
516 HeVAL(hent) = Nullsv;
526 SvREFCNT_dec(strtab);
529 warn("Scalars leaked: %ld\n", (long)sv_count);
533 /* No SVs have survived, need to clean out */
536 Safefree(origfilename);
537 Safefree(archpat_auto);
538 Safefree(reg_start_tmp);
539 Safefree(HeKEY_hek(&hv_fetch_ent_mh));
542 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
544 DEBUG_P(debprofdump());
546 MUTEX_DESTROY(&sv_mutex);
547 MUTEX_DESTROY(&eval_mutex);
548 COND_DESTROY(&eval_cond);
550 /* As the penultimate thing, free the non-arena SV for thrsv */
551 Safefree(SvPVX(thrsv));
552 Safefree(SvANY(thrsv));
555 #endif /* USE_THREADS */
557 /* As the absolutely last thing, free the non-arena SV for mess() */
560 /* we know that type >= SVt_PV */
562 Safefree(SvPVX(mess_sv));
563 Safefree(SvANY(mess_sv));
571 CPerlObj::perl_free(void)
573 perl_free(PerlInterpreter *sv_interp)
579 if (!(curinterp = sv_interp))
587 CPerlObj::perl_atexit(void (*fn) (CPerlObj*,void *), void *ptr)
589 perl_atexit(void (*fn) (void *), void *ptr)
592 Renew(exitlist, exitlistlen+1, PerlExitListEntry);
593 exitlist[exitlistlen].fn = fn;
594 exitlist[exitlistlen].ptr = ptr;
600 CPerlObj::perl_parse(void (*xsinit) (CPerlObj*), int argc, char **argv, char **env)
602 perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char **argv, char **env)
608 char *scriptname = NULL;
609 VOL bool dosearch = FALSE;
617 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
620 croak("suidperl is no longer needed since the kernel can now execute\n\
621 setuid perl scripts securely.\n");
626 if (!(curinterp = sv_interp))
630 #if defined(NeXT) && defined(__DYNAMIC__)
631 _dyld_lookup_and_bind
632 ("__environ", (unsigned long *) &environ_pointer, NULL);
637 #ifndef VMS /* VMS doesn't have environ array */
638 origenviron = environ;
643 /* Come here if running an undumped a.out. */
645 origfilename = savepv(argv[0]);
647 cxstack_ix = -1; /* start label stack again */
649 init_postdump_symbols(argc,argv,env);
654 curpad = AvARRAY(comppad);
659 SvREFCNT_dec(main_cv);
663 oldscope = scopestack_ix;
671 /* my_exit() was called */
672 while (scopestack_ix > oldscope)
677 call_list(oldscope, endav);
679 return STATUS_NATIVE_EXPORT;
682 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
686 sv_setpvn(linestr,"",0);
687 sv = newSVpv("",0); /* first used for -I flags */
691 for (argc--,argv++; argc > 0; argc--,argv++) {
692 if (argv[0][0] != '-' || !argv[0][1])
696 validarg = " PHOOEY ";
722 if (s = moreswitches(s))
732 if (euid != uid || egid != gid)
733 croak("No -e allowed in setuid scripts");
735 e_script = newSVpv("",0);
736 filter_add(read_e_script, NULL);
739 sv_catpv(e_script, s);
741 sv_catpv(e_script, argv[1]);
745 croak("No code specified for -e");
746 sv_catpv(e_script, "\n");
749 case 'I': /* -I handled both here and in moreswitches() */
751 if (!*++s && (s=argv[1]) != Nullch) {
754 while (s && isSPACE(*s))
758 for (e = s; *e && !isSPACE(*e); e++) ;
765 } /* XXX else croak? */
779 preambleav = newAV();
780 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
782 Sv = newSVpv("print myconfig();",0);
784 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
786 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
788 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
789 sv_catpv(Sv,"\" Compile-time options:");
791 sv_catpv(Sv," DEBUGGING");
794 sv_catpv(Sv," NO_EMBED");
797 sv_catpv(Sv," MULTIPLICITY");
799 sv_catpv(Sv,"\\n\",");
801 #if defined(LOCAL_PATCH_COUNT)
802 if (LOCAL_PATCH_COUNT > 0) {
804 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
805 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
807 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
811 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
814 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
816 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
821 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
822 print \" \\%ENV:\\n @env\\n\" if @env; \
823 print \" \\@INC:\\n @INC\\n\";");
826 Sv = newSVpv("config_vars(qw(",0);
831 av_push(preambleav, Sv);
832 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
843 if (!*++s || isSPACE(*s)) {
847 /* catch use of gnu style long options */
848 if (strEQ(s, "version")) {
852 if (strEQ(s, "help")) {
859 croak("Unrecognized switch: -%s (-h will show valid options)",s);
864 if (!tainting && (s = PerlEnv_getenv("PERL5OPT"))) {
875 if (!strchr("DIMUdmw", *s))
876 croak("Illegal switch in PERL5OPT: -%c", *s);
882 scriptname = argv[0];
885 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
887 else if (scriptname == Nullch) {
889 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
897 open_script(scriptname,dosearch,sv,&fdscript);
899 validate_suid(validarg, scriptname,fdscript);
904 main_cv = compcv = (CV*)NEWSV(1104,0);
905 sv_upgrade((SV *)compcv, SVt_PVCV);
909 av_push(comppad, Nullsv);
910 curpad = AvARRAY(comppad);
911 comppad_name = newAV();
912 comppad_name_fill = 0;
913 min_intro_pending = 0;
916 av_store(comppad_name, 0, newSVpv("@_", 2));
917 curpad[0] = (SV*)newAV();
918 SvPADMY_on(curpad[0]); /* XXX Needed? */
920 New(666, CvMUTEXP(compcv), 1, perl_mutex);
921 MUTEX_INIT(CvMUTEXP(compcv));
922 #endif /* USE_THREADS */
924 comppadlist = newAV();
925 AvREAL_off(comppadlist);
926 av_store(comppadlist, 0, (SV*)comppad_name);
927 av_store(comppadlist, 1, (SV*)comppad);
928 CvPADLIST(compcv) = comppadlist;
930 boot_core_UNIVERSAL();
933 (*xsinit)(PERL_OBJECT_THIS); /* in case linked C routines want magical variables */
934 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
938 init_predump_symbols();
939 /* init_postdump_symbols not currently designed to be called */
940 /* more than once (ENV isn't cleared first, for example) */
941 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
943 init_postdump_symbols(argc,argv,env);
947 /* now parse the script */
949 SETERRNO(0,SS$_NORMAL);
951 if (yyparse() || error_count) {
953 croak("%s had compilation errors.\n", origfilename);
955 croak("Execution of %s aborted due to compilation errors.\n",
959 curcop->cop_line = 0;
963 SvREFCNT_dec(e_script);
967 /* now that script is parsed, we can modify record separator */
969 rs = SvREFCNT_inc(nrs);
970 sv_setsv(perl_get_sv("/", TRUE), rs);
981 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
982 dump_mstats("after compilation:");
993 CPerlObj::perl_run(void)
995 perl_run(PerlInterpreter *sv_interp)
1004 if (!(curinterp = sv_interp))
1008 oldscope = scopestack_ix;
1013 cxstack_ix = -1; /* start context stack again */
1016 /* my_exit() was called */
1017 while (scopestack_ix > oldscope)
1020 curstash = defstash;
1022 call_list(oldscope, endav);
1024 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1025 dump_mstats("after execution: ");
1028 return STATUS_NATIVE_EXPORT;
1031 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1036 POPSTACK_TO(mainstack);
1040 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1041 sawampersand ? "Enabling" : "Omitting"));
1044 DEBUG_x(dump_all());
1045 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1047 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1048 (unsigned long) thr));
1049 #endif /* USE_THREADS */
1052 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1055 if (PERLDB_SINGLE && DBsingle)
1056 sv_setiv(DBsingle, 1);
1058 call_list(oldscope, initav);
1068 else if (main_start) {
1069 CvDEPTH(main_cv) = 1;
1080 perl_get_sv(char *name, I32 create)
1084 if (name[1] == '\0' && !isALPHA(name[0])) {
1085 PADOFFSET tmp = find_threadsv(name);
1086 if (tmp != NOT_IN_PAD) {
1088 return THREADSV(tmp);
1091 #endif /* USE_THREADS */
1092 gv = gv_fetchpv(name, create, SVt_PV);
1099 perl_get_av(char *name, I32 create)
1101 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1110 perl_get_hv(char *name, I32 create)
1112 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1121 perl_get_cv(char *name, I32 create)
1123 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1124 if (create && !GvCVu(gv))
1125 return newSUB(start_subparse(FALSE, 0),
1126 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1134 /* Be sure to refetch the stack pointer after calling these routines. */
1137 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1139 /* See G_* flags in cop.h */
1140 /* null terminated arg list */
1147 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1152 return perl_call_pv(sub_name, flags);
1156 perl_call_pv(char *sub_name, I32 flags)
1157 /* name of the subroutine */
1158 /* See G_* flags in cop.h */
1160 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1164 perl_call_method(char *methname, I32 flags)
1165 /* name of the subroutine */
1166 /* See G_* flags in cop.h */
1172 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1177 return perl_call_sv(*stack_sp--, flags);
1180 /* May be called with any of a CV, a GV, or an SV containing the name. */
1182 perl_call_sv(SV *sv, I32 flags)
1184 /* See G_* flags in cop.h */
1187 LOGOP myop; /* fake syntax tree node */
1191 bool oldcatch = CATCH_GET;
1196 if (flags & G_DISCARD) {
1201 Zero(&myop, 1, LOGOP);
1202 myop.op_next = Nullop;
1203 if (!(flags & G_NOARGS))
1204 myop.op_flags |= OPf_STACKED;
1205 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1206 (flags & G_ARRAY) ? OPf_WANT_LIST :
1211 EXTEND(stack_sp, 1);
1214 oldscope = scopestack_ix;
1216 if (PERLDB_SUB && curstash != debstash
1217 /* Handle first BEGIN of -d. */
1218 && (DBcv || (DBcv = GvCV(DBsub)))
1219 /* Try harder, since this may have been a sighandler, thus
1220 * curstash may be meaningless. */
1221 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash)
1222 && !(flags & G_NODEBUG))
1223 op->op_private |= OPpENTERSUB_DB;
1225 if (flags & G_EVAL) {
1226 cLOGOP->op_other = op;
1228 /* we're trying to emulate pp_entertry() here */
1230 register PERL_CONTEXT *cx;
1231 I32 gimme = GIMME_V;
1236 push_return(op->op_next);
1237 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1239 eval_root = op; /* Only needed so that goto works right. */
1242 if (flags & G_KEEPERR)
1257 /* my_exit() was called */
1258 curstash = defstash;
1262 croak("Callback called exit");
1271 stack_sp = stack_base + oldmark;
1272 if (flags & G_ARRAY)
1276 *++stack_sp = &sv_undef;
1284 if (op == (OP*)&myop)
1285 op = pp_entersub(ARGS);
1288 retval = stack_sp - (stack_base + oldmark);
1289 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1293 if (flags & G_EVAL) {
1294 if (scopestack_ix > oldscope) {
1298 register PERL_CONTEXT *cx;
1310 CATCH_SET(oldcatch);
1312 if (flags & G_DISCARD) {
1313 stack_sp = stack_base + oldmark;
1322 /* Eval a string. The G_EVAL flag is always assumed. */
1325 perl_eval_sv(SV *sv, I32 flags)
1327 /* See G_* flags in cop.h */
1330 UNOP myop; /* fake syntax tree node */
1331 I32 oldmark = SP - stack_base;
1338 if (flags & G_DISCARD) {
1346 EXTEND(stack_sp, 1);
1348 oldscope = scopestack_ix;
1350 if (!(flags & G_NOARGS))
1351 myop.op_flags = OPf_STACKED;
1352 myop.op_next = Nullop;
1353 myop.op_type = OP_ENTEREVAL;
1354 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1355 (flags & G_ARRAY) ? OPf_WANT_LIST :
1357 if (flags & G_KEEPERR)
1358 myop.op_flags |= OPf_SPECIAL;
1368 /* my_exit() was called */
1369 curstash = defstash;
1373 croak("Callback called exit");
1382 stack_sp = stack_base + oldmark;
1383 if (flags & G_ARRAY)
1387 *++stack_sp = &sv_undef;
1392 if (op == (OP*)&myop)
1393 op = pp_entereval(ARGS);
1396 retval = stack_sp - (stack_base + oldmark);
1397 if (!(flags & G_KEEPERR))
1402 if (flags & G_DISCARD) {
1403 stack_sp = stack_base + oldmark;
1413 perl_eval_pv(char *p, I32 croak_on_error)
1416 SV* sv = newSVpv(p, 0);
1419 perl_eval_sv(sv, G_SCALAR);
1426 if (croak_on_error && SvTRUE(ERRSV))
1427 croak(SvPVx(ERRSV, na));
1432 /* Require a module. */
1435 perl_require_pv(char *pv)
1437 SV* sv = sv_newmortal();
1438 sv_setpv(sv, "require '");
1441 perl_eval_sv(sv, G_DISCARD);
1445 magicname(char *sym, char *name, I32 namlen)
1449 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1450 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1454 usage(char *name) /* XXX move this out into a module ? */
1457 /* This message really ought to be max 23 lines.
1458 * Removed -h because the user already knows that opton. Others? */
1460 static char *usage_msg[] = {
1461 "-0[octal] specify record separator (\\0, if no argument)",
1462 "-a autosplit mode with -n or -p (splits $_ into @F)",
1463 "-c check syntax only (runs BEGIN and END blocks)",
1464 "-d[:debugger] run scripts under debugger",
1465 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1466 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1467 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1468 "-i[extension] edit <> files in place (make backup if extension supplied)",
1469 "-Idirectory specify @INC/#include directory (may be used more than once)",
1470 "-l[octal] enable line ending processing, specifies line terminator",
1471 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1472 "-n assume 'while (<>) { ... }' loop around your script",
1473 "-p assume loop like -n but print line also like sed",
1474 "-P run script through C preprocessor before compilation",
1475 "-s enable some switch parsing for switches after script name",
1476 "-S look for the script using PATH environment variable",
1477 "-T turn on tainting checks",
1478 "-u dump core after parsing script",
1479 "-U allow unsafe operations",
1480 "-v print version number, patchlevel plus VERY IMPORTANT perl info",
1481 "-V[:variable] print perl configuration information",
1482 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1483 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1487 char **p = usage_msg;
1489 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1491 printf("\n %s", *p++);
1494 /* This routine handles any switches that can be given during run */
1497 moreswitches(char *s)
1506 rschar = scan_oct(s, 4, &numlen);
1508 if (rschar & ~((U8)~0))
1510 else if (!rschar && numlen >= 2)
1511 nrs = newSVpv("", 0);
1514 nrs = newSVpv(&ch, 1);
1520 splitstr = savepv(s + 1);
1534 if (*s == ':' || *s == '=') {
1535 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1539 perldb = PERLDB_ALL;
1546 if (isALPHA(s[1])) {
1547 static char debopts[] = "psltocPmfrxuLHXD";
1550 for (s++; *s && (d = strchr(debopts,*s)); s++)
1551 debug |= 1 << (d - debopts);
1555 for (s++; isDIGIT(*s); s++) ;
1557 debug |= 0x80000000;
1559 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1560 for (s++; isALNUM(*s); s++) ;
1570 inplace = savepv(s+1);
1572 for (s = inplace; *s && !isSPACE(*s); s++) ;
1575 if (*s == '-') /* Additional switches on #! line. */
1579 case 'I': /* -I handled both here and in parse_perl() */
1582 while (*s && isSPACE(*s))
1586 for (e = s; *e && !isSPACE(*e); e++) ;
1587 p = savepvn(s, e-s);
1593 croak("No space allowed after -I");
1603 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1613 ors = SvPV(nrs, orslen);
1614 ors = savepvn(ors, orslen);
1618 forbid_setid("-M"); /* XXX ? */
1621 forbid_setid("-m"); /* XXX ? */
1626 /* -M-foo == 'no foo' */
1627 if (*s == '-') { use = "no "; ++s; }
1628 sv = newSVpv(use,0);
1630 /* We allow -M'Module qw(Foo Bar)' */
1631 while(isALNUM(*s) || *s==':') ++s;
1633 sv_catpv(sv, start);
1634 if (*(start-1) == 'm') {
1636 croak("Can't use '%c' after -mname", *s);
1637 sv_catpv( sv, " ()");
1640 sv_catpvn(sv, start, s-start);
1641 sv_catpv(sv, " split(/,/,q{");
1646 if (preambleav == NULL)
1647 preambleav = newAV();
1648 av_push(preambleav, sv);
1651 croak("No space allowed after -%c", *(s-1));
1668 croak("Too late for \"-T\" option");
1680 #if defined(SUBVERSION) && SUBVERSION > 0
1681 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1682 PATCHLEVEL, SUBVERSION, ARCHNAME);
1684 printf("\nThis is perl, version %s built for %s",
1685 patchlevel, ARCHNAME);
1687 #if defined(LOCAL_PATCH_COUNT)
1688 if (LOCAL_PATCH_COUNT > 0)
1689 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1690 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1693 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1695 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1698 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1699 printf("djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1998\n");
1702 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1703 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1706 printf("atariST series port, ++jrb bammi@cadence.com\n");
1709 Perl may be copied only under the terms of either the Artistic License or the\n\
1710 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\
1711 Complete documentation for Perl, including FAQ lists, should be found on\n\
1712 this system using `man perl' or `perldoc perl'. If you have access to the\n\
1713 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
1721 if (s[1] == '-') /* Additional switches on #! line. */
1732 #ifdef ALTERNATE_SHEBANG
1733 case 'S': /* OS/2 needs -S on "extproc" line. */
1741 croak("Can't emulate -%.1s on #! line",s);
1746 /* compliments of Tom Christiansen */
1748 /* unexec() can be found in the Gnu emacs distribution */
1749 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
1760 prog = newSVpv(BIN_EXP, 0);
1761 sv_catpv(prog, "/perl");
1762 file = newSVpv(origfilename, 0);
1763 sv_catpv(file, ".perldump");
1765 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1766 /* unexec prints msg to stderr in case of failure */
1767 PerlProc_exit(status);
1770 # include <lib$routines.h>
1771 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1773 ABORT(); /* for use with undump */
1778 /* initialize curinterp */
1783 #ifdef PERL_OBJECT /* XXX kludge */
1788 curcop = &compiling; \
1793 laststype = OP_STAT; \
1795 maxsysfd = MAXSYSFD; \
1796 statname = Nullsv; \
1802 laststype = OP_STAT; \
1809 in_clean_objs = FALSE; \
1810 in_clean_all= FALSE; \
1811 profiledata = NULL; \
1813 rsfp_filters= Nullav; \
1817 # ifdef MULTIPLICITY
1818 # define PERLVAR(var,type)
1819 # define PERLVARI(var,type,init) curinterp->var = init;
1820 # define PERLVARIC(var,type,init) curinterp->var = init;
1821 # include "intrpvar.h"
1822 # ifndef USE_THREADS
1823 # include "thrdvar.h"
1829 # define PERLVAR(var,type)
1830 # define PERLVARI(var,type,init) var = init;
1831 # define PERLVARIC(var,type,init) var = init;
1832 # include "intrpvar.h"
1833 # ifndef USE_THREADS
1834 # include "thrdvar.h"
1845 init_main_stash(void)
1850 /* Note that strtab is a rather special HV. Assumptions are made
1851 about not iterating on it, and not adding tie magic to it.
1852 It is properly deallocated in perl_destruct() */
1854 HvSHAREKEYS_off(strtab); /* mandatory */
1855 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1856 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1858 curstash = defstash = newHV();
1859 curstname = newSVpv("main",4);
1860 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1861 SvREFCNT_dec(GvHV(gv));
1862 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1864 HvNAME(defstash) = savepv("main");
1865 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1867 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1868 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1870 replgv = gv_HVadd(gv_fetchpv("\022", TRUE, SVt_PV)); /* ^R */
1872 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1873 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1874 sv_setpvn(ERRSV, "", 0);
1875 curstash = defstash;
1876 compiling.cop_stash = defstash;
1877 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1878 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1879 /* We must init $/ before switches are processed. */
1880 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1884 open_script(char *scriptname, bool dosearch, SV *sv, int *fdscript)
1889 /* scriptname will be non-NULL if find_script() returns */
1890 scriptname = find_script(scriptname, dosearch, NULL, 1);
1892 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1893 char *s = scriptname + 8;
1894 *fdscript = atoi(s);
1902 origfilename = (e_script ? savepv("-e") : scriptname);
1903 curcop->cop_filegv = gv_fetchfile(origfilename);
1904 if (strEQ(origfilename,"-"))
1906 if (*fdscript >= 0) {
1907 rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1908 #if defined(HAS_FCNTL) && defined(F_SETFD)
1910 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1913 else if (preprocess) {
1914 char *cpp_cfg = CPPSTDIN;
1915 SV *cpp = newSVpv("",0);
1916 SV *cmd = NEWSV(0,0);
1918 if (strEQ(cpp_cfg, "cppstdin"))
1919 sv_catpvf(cpp, "%s/", BIN_EXP);
1920 sv_catpv(cpp, cpp_cfg);
1923 sv_catpv(sv,PRIVLIB_EXP);
1927 sed %s -e \"/^[^#]/b\" \
1928 -e \"/^#[ ]*include[ ]/b\" \
1929 -e \"/^#[ ]*define[ ]/b\" \
1930 -e \"/^#[ ]*if[ ]/b\" \
1931 -e \"/^#[ ]*ifdef[ ]/b\" \
1932 -e \"/^#[ ]*ifndef[ ]/b\" \
1933 -e \"/^#[ ]*else/b\" \
1934 -e \"/^#[ ]*elif[ ]/b\" \
1935 -e \"/^#[ ]*undef[ ]/b\" \
1936 -e \"/^#[ ]*endif/b\" \
1939 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1942 %s %s -e '/^[^#]/b' \
1943 -e '/^#[ ]*include[ ]/b' \
1944 -e '/^#[ ]*define[ ]/b' \
1945 -e '/^#[ ]*if[ ]/b' \
1946 -e '/^#[ ]*ifdef[ ]/b' \
1947 -e '/^#[ ]*ifndef[ ]/b' \
1948 -e '/^#[ ]*else/b' \
1949 -e '/^#[ ]*elif[ ]/b' \
1950 -e '/^#[ ]*undef[ ]/b' \
1951 -e '/^#[ ]*endif/b' \
1959 (doextract ? "-e '1,/^#/d\n'" : ""),
1961 scriptname, cpp, sv, CPPMINUS);
1963 #ifdef IAMSUID /* actually, this is caught earlier */
1964 if (euid != uid && !euid) { /* if running suidperl */
1966 (void)seteuid(uid); /* musn't stay setuid root */
1969 (void)setreuid((Uid_t)-1, uid);
1971 #ifdef HAS_SETRESUID
1972 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
1974 PerlProc_setuid(uid);
1978 if (PerlProc_geteuid() != uid)
1979 croak("Can't do seteuid!\n");
1981 #endif /* IAMSUID */
1982 rsfp = PerlProc_popen(SvPVX(cmd), "r");
1986 else if (!*scriptname) {
1987 forbid_setid("program input from stdin");
1988 rsfp = PerlIO_stdin();
1991 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1992 #if defined(HAS_FCNTL) && defined(F_SETFD)
1994 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1999 #ifndef IAMSUID /* in case script is not readable before setuid */
2000 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2001 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2003 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2004 croak("Can't do setuid\n");
2008 croak("Can't open perl script \"%s\": %s\n",
2009 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2014 validate_suid(char *validarg, char *scriptname, int fdscript)
2018 /* do we need to emulate setuid on scripts? */
2020 /* This code is for those BSD systems that have setuid #! scripts disabled
2021 * in the kernel because of a security problem. Merely defining DOSUID
2022 * in perl will not fix that problem, but if you have disabled setuid
2023 * scripts in the kernel, this will attempt to emulate setuid and setgid
2024 * on scripts that have those now-otherwise-useless bits set. The setuid
2025 * root version must be called suidperl or sperlN.NNN. If regular perl
2026 * discovers that it has opened a setuid script, it calls suidperl with
2027 * the same argv that it had. If suidperl finds that the script it has
2028 * just opened is NOT setuid root, it sets the effective uid back to the
2029 * uid. We don't just make perl setuid root because that loses the
2030 * effective uid we had before invoking perl, if it was different from the
2033 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2034 * be defined in suidperl only. suidperl must be setuid root. The
2035 * Configure script will set this up for you if you want it.
2042 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2043 croak("Can't stat script \"%s\"",origfilename);
2044 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2048 #ifndef HAS_SETREUID
2049 /* On this access check to make sure the directories are readable,
2050 * there is actually a small window that the user could use to make
2051 * filename point to an accessible directory. So there is a faint
2052 * chance that someone could execute a setuid script down in a
2053 * non-accessible directory. I don't know what to do about that.
2054 * But I don't think it's too important. The manual lies when
2055 * it says access() is useful in setuid programs.
2057 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2058 croak("Permission denied");
2060 /* If we can swap euid and uid, then we can determine access rights
2061 * with a simple stat of the file, and then compare device and
2062 * inode to make sure we did stat() on the same file we opened.
2063 * Then we just have to make sure he or she can execute it.
2066 struct stat tmpstatbuf;
2070 setreuid(euid,uid) < 0
2073 setresuid(euid,uid,(Uid_t)-1) < 0
2076 || PerlProc_getuid() != euid || PerlProc_geteuid() != uid)
2077 croak("Can't swap uid and euid"); /* really paranoid */
2078 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2079 croak("Permission denied"); /* testing full pathname here */
2080 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2081 tmpstatbuf.st_ino != statbuf.st_ino) {
2082 (void)PerlIO_close(rsfp);
2083 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2085 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2086 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2087 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2088 (long)statbuf.st_dev, (long)statbuf.st_ino,
2089 SvPVX(GvSV(curcop->cop_filegv)),
2090 (long)statbuf.st_uid, (long)statbuf.st_gid);
2091 (void)PerlProc_pclose(rsfp);
2093 croak("Permission denied\n");
2097 setreuid(uid,euid) < 0
2099 # if defined(HAS_SETRESUID)
2100 setresuid(uid,euid,(Uid_t)-1) < 0
2103 || PerlProc_getuid() != uid || PerlProc_geteuid() != euid)
2104 croak("Can't reswap uid and euid");
2105 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2106 croak("Permission denied\n");
2108 #endif /* HAS_SETREUID */
2109 #endif /* IAMSUID */
2111 if (!S_ISREG(statbuf.st_mode))
2112 croak("Permission denied");
2113 if (statbuf.st_mode & S_IWOTH)
2114 croak("Setuid/gid script is writable by world");
2115 doswitches = FALSE; /* -s is insecure in suid */
2117 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2118 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2119 croak("No #! line");
2120 s = SvPV(linestr,na)+2;
2122 while (!isSPACE(*s)) s++;
2123 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2124 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2125 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2126 croak("Not a perl script");
2127 while (*s == ' ' || *s == '\t') s++;
2129 * #! arg must be what we saw above. They can invoke it by
2130 * mentioning suidperl explicitly, but they may not add any strange
2131 * arguments beyond what #! says if they do invoke suidperl that way.
2133 len = strlen(validarg);
2134 if (strEQ(validarg," PHOOEY ") ||
2135 strnNE(s,validarg,len) || !isSPACE(s[len]))
2136 croak("Args must match #! line");
2139 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2140 euid == statbuf.st_uid)
2142 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2143 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2144 #endif /* IAMSUID */
2146 if (euid) { /* oops, we're not the setuid root perl */
2147 (void)PerlIO_close(rsfp);
2150 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2152 croak("Can't do setuid\n");
2155 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2157 (void)setegid(statbuf.st_gid);
2160 (void)setregid((Gid_t)-1,statbuf.st_gid);
2162 #ifdef HAS_SETRESGID
2163 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2165 PerlProc_setgid(statbuf.st_gid);
2169 if (PerlProc_getegid() != statbuf.st_gid)
2170 croak("Can't do setegid!\n");
2172 if (statbuf.st_mode & S_ISUID) {
2173 if (statbuf.st_uid != euid)
2175 (void)seteuid(statbuf.st_uid); /* all that for this */
2178 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2180 #ifdef HAS_SETRESUID
2181 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2183 PerlProc_setuid(statbuf.st_uid);
2187 if (PerlProc_geteuid() != statbuf.st_uid)
2188 croak("Can't do seteuid!\n");
2190 else if (uid) { /* oops, mustn't run as root */
2192 (void)seteuid((Uid_t)uid);
2195 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2197 #ifdef HAS_SETRESUID
2198 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2200 PerlProc_setuid((Uid_t)uid);
2204 if (PerlProc_geteuid() != uid)
2205 croak("Can't do seteuid!\n");
2208 if (!cando(S_IXUSR,TRUE,&statbuf))
2209 croak("Permission denied\n"); /* they can't do this */
2212 else if (preprocess)
2213 croak("-P not allowed for setuid/setgid script\n");
2214 else if (fdscript >= 0)
2215 croak("fd script not allowed in suidperl\n");
2217 croak("Script is not setuid/setgid in suidperl\n");
2219 /* We absolutely must clear out any saved ids here, so we */
2220 /* exec the real perl, substituting fd script for scriptname. */
2221 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2222 PerlIO_rewind(rsfp);
2223 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2224 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2225 if (!origargv[which])
2226 croak("Permission denied");
2227 origargv[which] = savepv(form("/dev/fd/%d/%s",
2228 PerlIO_fileno(rsfp), origargv[which]));
2229 #if defined(HAS_FCNTL) && defined(F_SETFD)
2230 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2232 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2233 croak("Can't do setuid\n");
2234 #endif /* IAMSUID */
2236 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2237 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2239 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2240 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2242 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2245 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2246 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2247 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2248 /* not set-id, must be wrapped */
2254 find_beginning(void)
2256 register char *s, *s2;
2258 /* skip forward in input to the real script? */
2262 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2263 croak("No Perl script found in input\n");
2264 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2265 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2267 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2269 while (*s == ' ' || *s == '\t') s++;
2271 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2272 if (strnEQ(s2-4,"perl",4))
2274 while (s = moreswitches(s)) ;
2276 if (cddir && PerlDir_chdir(cddir) < 0)
2277 croak("Can't chdir to %s",cddir);
2286 uid = (int)PerlProc_getuid();
2287 euid = (int)PerlProc_geteuid();
2288 gid = (int)PerlProc_getgid();
2289 egid = (int)PerlProc_getegid();
2294 tainting |= (uid && (euid != uid || egid != gid));
2298 forbid_setid(char *s)
2301 croak("No %s allowed while running setuid", s);
2303 croak("No %s allowed while running setgid", s);
2310 curstash = debstash;
2311 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2313 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2314 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2315 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2316 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2317 sv_setiv(DBsingle, 0);
2318 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2319 sv_setiv(DBtrace, 0);
2320 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2321 sv_setiv(DBsignal, 0);
2322 curstash = defstash;
2325 #ifndef STRESS_REALLOC
2326 #define REASONABLE(size) (size)
2328 #define REASONABLE(size) (1) /* unreasonable */
2332 init_stacks(ARGSproto)
2334 /* start with 128-item stack and 8K cxstack */
2335 curstackinfo = new_stackinfo(REASONABLE(128),
2336 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
2337 curstackinfo->si_type = SI_MAIN;
2338 curstack = curstackinfo->si_stack;
2339 mainstack = curstack; /* remember in case we switch stacks */
2341 stack_base = AvARRAY(curstack);
2342 stack_sp = stack_base;
2343 stack_max = stack_base + AvMAX(curstack);
2345 New(50,tmps_stack,REASONABLE(128),SV*);
2348 tmps_max = REASONABLE(128);
2350 New(54,markstack,REASONABLE(32),I32);
2351 markstack_ptr = markstack;
2352 markstack_max = markstack + REASONABLE(32);
2356 New(54,scopestack,REASONABLE(32),I32);
2358 scopestack_max = REASONABLE(32);
2360 New(54,savestack,REASONABLE(128),ANY);
2362 savestack_max = REASONABLE(128);
2364 New(54,retstack,REASONABLE(16),OP*);
2366 retstack_max = REASONABLE(16);
2375 while (curstackinfo->si_next)
2376 curstackinfo = curstackinfo->si_next;
2377 while (curstackinfo) {
2378 PERL_SI *p = curstackinfo->si_prev;
2379 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
2380 Safefree(curstackinfo->si_cxstack);
2381 Safefree(curstackinfo);
2384 Safefree(tmps_stack);
2385 Safefree(markstack);
2386 Safefree(scopestack);
2387 Safefree(savestack);
2396 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2409 subname = newSVpv("main",4);
2413 init_predump_symbols(void)
2419 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2420 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2421 GvMULTI_on(stdingv);
2422 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2423 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2425 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2427 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2429 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2431 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2433 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2435 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2436 GvMULTI_on(othergv);
2437 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2438 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2440 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2442 statname = NEWSV(66,0); /* last filename we did stat on */
2445 osname = savepv(OSNAME);
2449 init_postdump_symbols(register int argc, register char **argv, register char **env)
2456 argc--,argv++; /* skip name of script */
2458 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2461 if (argv[0][1] == '-') {
2465 if (s = strchr(argv[0], '=')) {
2467 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2470 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2473 toptarget = NEWSV(0,0);
2474 sv_upgrade(toptarget, SVt_PVFM);
2475 sv_setpvn(toptarget, "", 0);
2476 bodytarget = NEWSV(0,0);
2477 sv_upgrade(bodytarget, SVt_PVFM);
2478 sv_setpvn(bodytarget, "", 0);
2479 formtarget = bodytarget;
2482 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2483 sv_setpv(GvSV(tmpgv),origfilename);
2484 magicname("0", "0", 1);
2486 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2487 sv_setpv(GvSV(tmpgv),origargv[0]);
2488 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2490 (void)gv_AVadd(argvgv);
2491 av_clear(GvAVn(argvgv));
2492 for (; argc > 0; argc--,argv++) {
2493 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2496 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2500 hv_magic(hv, envgv, 'E');
2501 #ifndef VMS /* VMS doesn't have environ array */
2502 /* Note that if the supplied env parameter is actually a copy
2503 of the global environ then it may now point to free'd memory
2504 if the environment has been modified since. To avoid this
2505 problem we treat env==NULL as meaning 'use the default'
2510 environ[0] = Nullch;
2511 for (; *env; env++) {
2512 if (!(s = strchr(*env,'=')))
2518 sv = newSVpv(s--,0);
2519 (void)hv_store(hv, *env, s - *env, sv, 0);
2521 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2522 /* Sins of the RTL. See note in my_setenv(). */
2523 (void)PerlEnv_putenv(savepv(*env));
2527 #ifdef DYNAMIC_ENV_FETCH
2528 HvNAME(hv) = savepv(ENV_HV_NAME);
2532 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2533 sv_setiv(GvSV(tmpgv), (IV)getpid());
2542 s = PerlEnv_getenv("PERL5LIB");
2546 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2548 /* Treat PERL5?LIB as a possible search list logical name -- the
2549 * "natural" VMS idiom for a Unix path string. We allow each
2550 * element to be a set of |-separated directories for compatibility.
2554 if (my_trnlnm("PERL5LIB",buf,0))
2555 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2557 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2561 /* Use the ~-expanded versions of APPLLIB (undocumented),
2562 ARCHLIB PRIVLIB SITEARCH and SITELIB
2565 incpush(APPLLIB_EXP, TRUE);
2569 incpush(ARCHLIB_EXP, FALSE);
2572 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2575 incpush(PRIVLIB_EXP, TRUE);
2577 incpush(PRIVLIB_EXP, FALSE);
2581 incpush(SITEARCH_EXP, FALSE);
2585 incpush(SITELIB_EXP, TRUE);
2587 incpush(SITELIB_EXP, FALSE);
2591 incpush(".", FALSE);
2595 # define PERLLIB_SEP ';'
2598 # define PERLLIB_SEP '|'
2600 # define PERLLIB_SEP ':'
2603 #ifndef PERLLIB_MANGLE
2604 # define PERLLIB_MANGLE(s,n) (s)
2608 incpush(char *p, int addsubdirs)
2610 SV *subdir = Nullsv;
2616 subdir = sv_newmortal();
2617 if (!archpat_auto) {
2618 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2619 + sizeof("//auto"));
2620 New(55, archpat_auto, len, char);
2621 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2623 for (len = sizeof(ARCHNAME) + 2;
2624 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2625 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2630 /* Break at all separators */
2632 SV *libdir = NEWSV(55,0);
2635 /* skip any consecutive separators */
2636 while ( *p == PERLLIB_SEP ) {
2637 /* Uncomment the next line for PATH semantics */
2638 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2642 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2643 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2648 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2649 p = Nullch; /* break out */
2653 * BEFORE pushing libdir onto @INC we may first push version- and
2654 * archname-specific sub-directories.
2657 struct stat tmpstatbuf;
2662 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2664 while (unix[len-1] == '/') len--; /* Cosmetic */
2665 sv_usepvn(libdir,unix,len);
2668 PerlIO_printf(PerlIO_stderr(),
2669 "Failed to unixify @INC element \"%s\"\n",
2672 /* .../archname/version if -d .../archname/version/auto */
2673 sv_setsv(subdir, libdir);
2674 sv_catpv(subdir, archpat_auto);
2675 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2676 S_ISDIR(tmpstatbuf.st_mode))
2677 av_push(GvAVn(incgv),
2678 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2680 /* .../archname if -d .../archname/auto */
2681 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2682 strlen(patchlevel) + 1, "", 0);
2683 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2684 S_ISDIR(tmpstatbuf.st_mode))
2685 av_push(GvAVn(incgv),
2686 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2689 /* finally push this lib directory on the end of @INC */
2690 av_push(GvAVn(incgv), libdir);
2695 STATIC struct perl_thread *
2698 struct perl_thread *thr;
2701 Newz(53, thr, 1, struct perl_thread);
2702 curcop = &compiling;
2703 thr->cvcache = newHV();
2704 thr->threadsv = newAV();
2705 /* thr->threadsvp is set when find_threadsv is called */
2706 thr->specific = newAV();
2707 thr->errhv = newHV();
2708 thr->flags = THRf_R_JOINABLE;
2709 MUTEX_INIT(&thr->mutex);
2710 /* Handcraft thrsv similarly to mess_sv */
2711 New(53, thrsv, 1, SV);
2712 Newz(53, xpv, 1, XPV);
2713 SvFLAGS(thrsv) = SVt_PV;
2714 SvANY(thrsv) = (void*)xpv;
2715 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2716 SvPVX(thrsv) = (char*)thr;
2717 SvCUR_set(thrsv, sizeof(thr));
2718 SvLEN_set(thrsv, sizeof(thr));
2719 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2723 MUTEX_LOCK(&threads_mutex);
2728 MUTEX_UNLOCK(&threads_mutex);
2730 #ifdef HAVE_THREAD_INTERN
2731 init_thread_intern(thr);
2734 #ifdef SET_THREAD_SELF
2735 SET_THREAD_SELF(thr);
2737 thr->self = pthread_self();
2738 #endif /* SET_THREAD_SELF */
2742 * These must come after the SET_THR because sv_setpvn does
2743 * SvTAINT and the taint fields require dTHR.
2745 toptarget = NEWSV(0,0);
2746 sv_upgrade(toptarget, SVt_PVFM);
2747 sv_setpvn(toptarget, "", 0);
2748 bodytarget = NEWSV(0,0);
2749 sv_upgrade(bodytarget, SVt_PVFM);
2750 sv_setpvn(bodytarget, "", 0);
2751 formtarget = bodytarget;
2752 thr->errsv = newSVpv("", 0);
2753 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2756 #endif /* USE_THREADS */
2759 call_list(I32 oldscope, AV *paramList)
2762 line_t oldline = curcop->cop_line;
2767 while (AvFILL(paramList) >= 0) {
2768 CV *cv = (CV*)av_shift(paramList);
2777 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2778 (void)SvPV(atsv, len);
2781 curcop = &compiling;
2782 curcop->cop_line = oldline;
2783 if (paramList == beginav)
2784 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2786 sv_catpv(atsv, "END failed--cleanup aborted");
2787 while (scopestack_ix > oldscope)
2789 croak("%s", SvPVX(atsv));
2797 /* my_exit() was called */
2798 while (scopestack_ix > oldscope)
2801 curstash = defstash;
2803 call_list(oldscope, endav);
2805 curcop = &compiling;
2806 curcop->cop_line = oldline;
2808 if (paramList == beginav)
2809 croak("BEGIN failed--compilation aborted");
2811 croak("END failed--cleanup aborted");
2817 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2822 curcop = &compiling;
2823 curcop->cop_line = oldline;
2836 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2837 thr, (unsigned long) status));
2838 #endif /* USE_THREADS */
2847 STATUS_NATIVE_SET(status);
2854 my_failure_exit(void)
2857 if (vaxc$errno & 1) {
2858 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2859 STATUS_NATIVE_SET(44);
2862 if (!vaxc$errno && errno) /* unlikely */
2863 STATUS_NATIVE_SET(44);
2865 STATUS_NATIVE_SET(vaxc$errno);
2870 STATUS_POSIX_SET(errno);
2872 exitstatus = STATUS_POSIX >> 8;
2873 if (exitstatus & 255)
2874 STATUS_POSIX_SET(exitstatus);
2876 STATUS_POSIX_SET(255);
2886 register PERL_CONTEXT *cx;
2891 SvREFCNT_dec(e_script);
2895 POPSTACK_TO(mainstack);
2896 if (cxstack_ix >= 0) {
2911 read_e_script(CPerlObj *pPerl, int idx, SV *buf_sv, int maxlen)
2913 read_e_script(int idx, SV *buf_sv, int maxlen)
2917 p = SvPVX(e_script);
2918 nl = strchr(p, '\n');
2919 nl = (nl) ? nl+1 : SvEND(e_script);
2922 sv_catpvn(buf_sv, p, nl-p);
2923 sv_chop(e_script, nl);