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)
1439 PUSHSTACKi(SI_REQUIRE);
1441 sv = sv_newmortal();
1442 sv_setpv(sv, "require '");
1445 perl_eval_sv(sv, G_DISCARD);
1451 magicname(char *sym, char *name, I32 namlen)
1455 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1456 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1460 usage(char *name) /* XXX move this out into a module ? */
1463 /* This message really ought to be max 23 lines.
1464 * Removed -h because the user already knows that opton. Others? */
1466 static char *usage_msg[] = {
1467 "-0[octal] specify record separator (\\0, if no argument)",
1468 "-a autosplit mode with -n or -p (splits $_ into @F)",
1469 "-c check syntax only (runs BEGIN and END blocks)",
1470 "-d[:debugger] run scripts under debugger",
1471 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1472 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1473 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1474 "-i[extension] edit <> files in place (make backup if extension supplied)",
1475 "-Idirectory specify @INC/#include directory (may be used more than once)",
1476 "-l[octal] enable line ending processing, specifies line terminator",
1477 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1478 "-n assume 'while (<>) { ... }' loop around your script",
1479 "-p assume loop like -n but print line also like sed",
1480 "-P run script through C preprocessor before compilation",
1481 "-s enable some switch parsing for switches after script name",
1482 "-S look for the script using PATH environment variable",
1483 "-T turn on tainting checks",
1484 "-u dump core after parsing script",
1485 "-U allow unsafe operations",
1486 "-v print version number, patchlevel plus VERY IMPORTANT perl info",
1487 "-V[:variable] print perl configuration information",
1488 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1489 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1493 char **p = usage_msg;
1495 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1497 printf("\n %s", *p++);
1500 /* This routine handles any switches that can be given during run */
1503 moreswitches(char *s)
1512 rschar = scan_oct(s, 4, &numlen);
1514 if (rschar & ~((U8)~0))
1516 else if (!rschar && numlen >= 2)
1517 nrs = newSVpv("", 0);
1520 nrs = newSVpv(&ch, 1);
1526 splitstr = savepv(s + 1);
1540 if (*s == ':' || *s == '=') {
1541 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1545 perldb = PERLDB_ALL;
1552 if (isALPHA(s[1])) {
1553 static char debopts[] = "psltocPmfrxuLHXD";
1556 for (s++; *s && (d = strchr(debopts,*s)); s++)
1557 debug |= 1 << (d - debopts);
1561 for (s++; isDIGIT(*s); s++) ;
1563 debug |= 0x80000000;
1565 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1566 for (s++; isALNUM(*s); s++) ;
1576 inplace = savepv(s+1);
1578 for (s = inplace; *s && !isSPACE(*s); s++) ;
1581 if (*s == '-') /* Additional switches on #! line. */
1585 case 'I': /* -I handled both here and in parse_perl() */
1588 while (*s && isSPACE(*s))
1592 for (e = s; *e && !isSPACE(*e); e++) ;
1593 p = savepvn(s, e-s);
1599 croak("No space allowed after -I");
1609 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1619 ors = SvPV(nrs, orslen);
1620 ors = savepvn(ors, orslen);
1624 forbid_setid("-M"); /* XXX ? */
1627 forbid_setid("-m"); /* XXX ? */
1632 /* -M-foo == 'no foo' */
1633 if (*s == '-') { use = "no "; ++s; }
1634 sv = newSVpv(use,0);
1636 /* We allow -M'Module qw(Foo Bar)' */
1637 while(isALNUM(*s) || *s==':') ++s;
1639 sv_catpv(sv, start);
1640 if (*(start-1) == 'm') {
1642 croak("Can't use '%c' after -mname", *s);
1643 sv_catpv( sv, " ()");
1646 sv_catpvn(sv, start, s-start);
1647 sv_catpv(sv, " split(/,/,q{");
1652 if (preambleav == NULL)
1653 preambleav = newAV();
1654 av_push(preambleav, sv);
1657 croak("No space allowed after -%c", *(s-1));
1674 croak("Too late for \"-T\" option");
1686 #if defined(SUBVERSION) && SUBVERSION > 0
1687 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1688 PATCHLEVEL, SUBVERSION, ARCHNAME);
1690 printf("\nThis is perl, version %s built for %s",
1691 patchlevel, ARCHNAME);
1693 #if defined(LOCAL_PATCH_COUNT)
1694 if (LOCAL_PATCH_COUNT > 0)
1695 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1696 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1699 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1701 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1704 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1705 printf("djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1998\n");
1708 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1709 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1712 printf("atariST series port, ++jrb bammi@cadence.com\n");
1715 Perl may be copied only under the terms of either the Artistic License or the\n\
1716 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\
1717 Complete documentation for Perl, including FAQ lists, should be found on\n\
1718 this system using `man perl' or `perldoc perl'. If you have access to the\n\
1719 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
1727 if (s[1] == '-') /* Additional switches on #! line. */
1738 #ifdef ALTERNATE_SHEBANG
1739 case 'S': /* OS/2 needs -S on "extproc" line. */
1747 croak("Can't emulate -%.1s on #! line",s);
1752 /* compliments of Tom Christiansen */
1754 /* unexec() can be found in the Gnu emacs distribution */
1755 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
1766 prog = newSVpv(BIN_EXP, 0);
1767 sv_catpv(prog, "/perl");
1768 file = newSVpv(origfilename, 0);
1769 sv_catpv(file, ".perldump");
1771 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1772 /* unexec prints msg to stderr in case of failure */
1773 PerlProc_exit(status);
1776 # include <lib$routines.h>
1777 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1779 ABORT(); /* for use with undump */
1784 /* initialize curinterp */
1789 #ifdef PERL_OBJECT /* XXX kludge */
1794 curcop = &compiling; \
1799 laststype = OP_STAT; \
1801 maxsysfd = MAXSYSFD; \
1802 statname = Nullsv; \
1808 laststype = OP_STAT; \
1815 in_clean_objs = FALSE; \
1816 in_clean_all= FALSE; \
1817 profiledata = NULL; \
1819 rsfp_filters= Nullav; \
1823 # ifdef MULTIPLICITY
1824 # define PERLVAR(var,type)
1825 # define PERLVARI(var,type,init) curinterp->var = init;
1826 # define PERLVARIC(var,type,init) curinterp->var = init;
1827 # include "intrpvar.h"
1828 # ifndef USE_THREADS
1829 # include "thrdvar.h"
1835 # define PERLVAR(var,type)
1836 # define PERLVARI(var,type,init) var = init;
1837 # define PERLVARIC(var,type,init) var = init;
1838 # include "intrpvar.h"
1839 # ifndef USE_THREADS
1840 # include "thrdvar.h"
1851 init_main_stash(void)
1856 /* Note that strtab is a rather special HV. Assumptions are made
1857 about not iterating on it, and not adding tie magic to it.
1858 It is properly deallocated in perl_destruct() */
1860 HvSHAREKEYS_off(strtab); /* mandatory */
1861 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1862 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1864 curstash = defstash = newHV();
1865 curstname = newSVpv("main",4);
1866 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1867 SvREFCNT_dec(GvHV(gv));
1868 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1870 HvNAME(defstash) = savepv("main");
1871 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1873 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1874 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1876 replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
1878 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1879 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1880 sv_setpvn(ERRSV, "", 0);
1881 curstash = defstash;
1882 compiling.cop_stash = defstash;
1883 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1884 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1885 /* We must init $/ before switches are processed. */
1886 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1890 open_script(char *scriptname, bool dosearch, SV *sv, int *fdscript)
1895 /* scriptname will be non-NULL if find_script() returns */
1896 scriptname = find_script(scriptname, dosearch, NULL, 1);
1898 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1899 char *s = scriptname + 8;
1900 *fdscript = atoi(s);
1908 origfilename = (e_script ? savepv("-e") : scriptname);
1909 curcop->cop_filegv = gv_fetchfile(origfilename);
1910 if (strEQ(origfilename,"-"))
1912 if (*fdscript >= 0) {
1913 rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1914 #if defined(HAS_FCNTL) && defined(F_SETFD)
1916 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1919 else if (preprocess) {
1920 char *cpp_cfg = CPPSTDIN;
1921 SV *cpp = newSVpv("",0);
1922 SV *cmd = NEWSV(0,0);
1924 if (strEQ(cpp_cfg, "cppstdin"))
1925 sv_catpvf(cpp, "%s/", BIN_EXP);
1926 sv_catpv(cpp, cpp_cfg);
1929 sv_catpv(sv,PRIVLIB_EXP);
1933 sed %s -e \"/^[^#]/b\" \
1934 -e \"/^#[ ]*include[ ]/b\" \
1935 -e \"/^#[ ]*define[ ]/b\" \
1936 -e \"/^#[ ]*if[ ]/b\" \
1937 -e \"/^#[ ]*ifdef[ ]/b\" \
1938 -e \"/^#[ ]*ifndef[ ]/b\" \
1939 -e \"/^#[ ]*else/b\" \
1940 -e \"/^#[ ]*elif[ ]/b\" \
1941 -e \"/^#[ ]*undef[ ]/b\" \
1942 -e \"/^#[ ]*endif/b\" \
1945 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1948 %s %s -e '/^[^#]/b' \
1949 -e '/^#[ ]*include[ ]/b' \
1950 -e '/^#[ ]*define[ ]/b' \
1951 -e '/^#[ ]*if[ ]/b' \
1952 -e '/^#[ ]*ifdef[ ]/b' \
1953 -e '/^#[ ]*ifndef[ ]/b' \
1954 -e '/^#[ ]*else/b' \
1955 -e '/^#[ ]*elif[ ]/b' \
1956 -e '/^#[ ]*undef[ ]/b' \
1957 -e '/^#[ ]*endif/b' \
1965 (doextract ? "-e '1,/^#/d\n'" : ""),
1967 scriptname, cpp, sv, CPPMINUS);
1969 #ifdef IAMSUID /* actually, this is caught earlier */
1970 if (euid != uid && !euid) { /* if running suidperl */
1972 (void)seteuid(uid); /* musn't stay setuid root */
1975 (void)setreuid((Uid_t)-1, uid);
1977 #ifdef HAS_SETRESUID
1978 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
1980 PerlProc_setuid(uid);
1984 if (PerlProc_geteuid() != uid)
1985 croak("Can't do seteuid!\n");
1987 #endif /* IAMSUID */
1988 rsfp = PerlProc_popen(SvPVX(cmd), "r");
1992 else if (!*scriptname) {
1993 forbid_setid("program input from stdin");
1994 rsfp = PerlIO_stdin();
1997 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1998 #if defined(HAS_FCNTL) && defined(F_SETFD)
2000 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2005 #ifndef IAMSUID /* in case script is not readable before setuid */
2006 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2007 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2009 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2010 croak("Can't do setuid\n");
2014 croak("Can't open perl script \"%s\": %s\n",
2015 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2020 validate_suid(char *validarg, char *scriptname, int fdscript)
2024 /* do we need to emulate setuid on scripts? */
2026 /* This code is for those BSD systems that have setuid #! scripts disabled
2027 * in the kernel because of a security problem. Merely defining DOSUID
2028 * in perl will not fix that problem, but if you have disabled setuid
2029 * scripts in the kernel, this will attempt to emulate setuid and setgid
2030 * on scripts that have those now-otherwise-useless bits set. The setuid
2031 * root version must be called suidperl or sperlN.NNN. If regular perl
2032 * discovers that it has opened a setuid script, it calls suidperl with
2033 * the same argv that it had. If suidperl finds that the script it has
2034 * just opened is NOT setuid root, it sets the effective uid back to the
2035 * uid. We don't just make perl setuid root because that loses the
2036 * effective uid we had before invoking perl, if it was different from the
2039 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2040 * be defined in suidperl only. suidperl must be setuid root. The
2041 * Configure script will set this up for you if you want it.
2048 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2049 croak("Can't stat script \"%s\"",origfilename);
2050 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2054 #ifndef HAS_SETREUID
2055 /* On this access check to make sure the directories are readable,
2056 * there is actually a small window that the user could use to make
2057 * filename point to an accessible directory. So there is a faint
2058 * chance that someone could execute a setuid script down in a
2059 * non-accessible directory. I don't know what to do about that.
2060 * But I don't think it's too important. The manual lies when
2061 * it says access() is useful in setuid programs.
2063 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2064 croak("Permission denied");
2066 /* If we can swap euid and uid, then we can determine access rights
2067 * with a simple stat of the file, and then compare device and
2068 * inode to make sure we did stat() on the same file we opened.
2069 * Then we just have to make sure he or she can execute it.
2072 struct stat tmpstatbuf;
2076 setreuid(euid,uid) < 0
2079 setresuid(euid,uid,(Uid_t)-1) < 0
2082 || PerlProc_getuid() != euid || PerlProc_geteuid() != uid)
2083 croak("Can't swap uid and euid"); /* really paranoid */
2084 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2085 croak("Permission denied"); /* testing full pathname here */
2086 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2087 tmpstatbuf.st_ino != statbuf.st_ino) {
2088 (void)PerlIO_close(rsfp);
2089 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2091 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2092 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2093 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2094 (long)statbuf.st_dev, (long)statbuf.st_ino,
2095 SvPVX(GvSV(curcop->cop_filegv)),
2096 (long)statbuf.st_uid, (long)statbuf.st_gid);
2097 (void)PerlProc_pclose(rsfp);
2099 croak("Permission denied\n");
2103 setreuid(uid,euid) < 0
2105 # if defined(HAS_SETRESUID)
2106 setresuid(uid,euid,(Uid_t)-1) < 0
2109 || PerlProc_getuid() != uid || PerlProc_geteuid() != euid)
2110 croak("Can't reswap uid and euid");
2111 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2112 croak("Permission denied\n");
2114 #endif /* HAS_SETREUID */
2115 #endif /* IAMSUID */
2117 if (!S_ISREG(statbuf.st_mode))
2118 croak("Permission denied");
2119 if (statbuf.st_mode & S_IWOTH)
2120 croak("Setuid/gid script is writable by world");
2121 doswitches = FALSE; /* -s is insecure in suid */
2123 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2124 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2125 croak("No #! line");
2126 s = SvPV(linestr,na)+2;
2128 while (!isSPACE(*s)) s++;
2129 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2130 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2131 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2132 croak("Not a perl script");
2133 while (*s == ' ' || *s == '\t') s++;
2135 * #! arg must be what we saw above. They can invoke it by
2136 * mentioning suidperl explicitly, but they may not add any strange
2137 * arguments beyond what #! says if they do invoke suidperl that way.
2139 len = strlen(validarg);
2140 if (strEQ(validarg," PHOOEY ") ||
2141 strnNE(s,validarg,len) || !isSPACE(s[len]))
2142 croak("Args must match #! line");
2145 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2146 euid == statbuf.st_uid)
2148 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2149 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2150 #endif /* IAMSUID */
2152 if (euid) { /* oops, we're not the setuid root perl */
2153 (void)PerlIO_close(rsfp);
2156 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2158 croak("Can't do setuid\n");
2161 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2163 (void)setegid(statbuf.st_gid);
2166 (void)setregid((Gid_t)-1,statbuf.st_gid);
2168 #ifdef HAS_SETRESGID
2169 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2171 PerlProc_setgid(statbuf.st_gid);
2175 if (PerlProc_getegid() != statbuf.st_gid)
2176 croak("Can't do setegid!\n");
2178 if (statbuf.st_mode & S_ISUID) {
2179 if (statbuf.st_uid != euid)
2181 (void)seteuid(statbuf.st_uid); /* all that for this */
2184 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2186 #ifdef HAS_SETRESUID
2187 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2189 PerlProc_setuid(statbuf.st_uid);
2193 if (PerlProc_geteuid() != statbuf.st_uid)
2194 croak("Can't do seteuid!\n");
2196 else if (uid) { /* oops, mustn't run as root */
2198 (void)seteuid((Uid_t)uid);
2201 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2203 #ifdef HAS_SETRESUID
2204 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2206 PerlProc_setuid((Uid_t)uid);
2210 if (PerlProc_geteuid() != uid)
2211 croak("Can't do seteuid!\n");
2214 if (!cando(S_IXUSR,TRUE,&statbuf))
2215 croak("Permission denied\n"); /* they can't do this */
2218 else if (preprocess)
2219 croak("-P not allowed for setuid/setgid script\n");
2220 else if (fdscript >= 0)
2221 croak("fd script not allowed in suidperl\n");
2223 croak("Script is not setuid/setgid in suidperl\n");
2225 /* We absolutely must clear out any saved ids here, so we */
2226 /* exec the real perl, substituting fd script for scriptname. */
2227 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2228 PerlIO_rewind(rsfp);
2229 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2230 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2231 if (!origargv[which])
2232 croak("Permission denied");
2233 origargv[which] = savepv(form("/dev/fd/%d/%s",
2234 PerlIO_fileno(rsfp), origargv[which]));
2235 #if defined(HAS_FCNTL) && defined(F_SETFD)
2236 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2238 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2239 croak("Can't do setuid\n");
2240 #endif /* IAMSUID */
2242 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2243 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2245 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2246 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2248 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2251 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2252 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2253 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2254 /* not set-id, must be wrapped */
2260 find_beginning(void)
2262 register char *s, *s2;
2264 /* skip forward in input to the real script? */
2268 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2269 croak("No Perl script found in input\n");
2270 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2271 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2273 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2275 while (*s == ' ' || *s == '\t') s++;
2277 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2278 if (strnEQ(s2-4,"perl",4))
2280 while (s = moreswitches(s)) ;
2282 if (cddir && PerlDir_chdir(cddir) < 0)
2283 croak("Can't chdir to %s",cddir);
2292 uid = (int)PerlProc_getuid();
2293 euid = (int)PerlProc_geteuid();
2294 gid = (int)PerlProc_getgid();
2295 egid = (int)PerlProc_getegid();
2300 tainting |= (uid && (euid != uid || egid != gid));
2304 forbid_setid(char *s)
2307 croak("No %s allowed while running setuid", s);
2309 croak("No %s allowed while running setgid", s);
2316 curstash = debstash;
2317 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2319 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2320 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2321 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2322 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2323 sv_setiv(DBsingle, 0);
2324 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2325 sv_setiv(DBtrace, 0);
2326 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2327 sv_setiv(DBsignal, 0);
2328 curstash = defstash;
2331 #ifndef STRESS_REALLOC
2332 #define REASONABLE(size) (size)
2334 #define REASONABLE(size) (1) /* unreasonable */
2338 init_stacks(ARGSproto)
2340 /* start with 128-item stack and 8K cxstack */
2341 curstackinfo = new_stackinfo(REASONABLE(128),
2342 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
2343 curstackinfo->si_type = SI_MAIN;
2344 curstack = curstackinfo->si_stack;
2345 mainstack = curstack; /* remember in case we switch stacks */
2347 stack_base = AvARRAY(curstack);
2348 stack_sp = stack_base;
2349 stack_max = stack_base + AvMAX(curstack);
2351 New(50,tmps_stack,REASONABLE(128),SV*);
2354 tmps_max = REASONABLE(128);
2356 New(54,markstack,REASONABLE(32),I32);
2357 markstack_ptr = markstack;
2358 markstack_max = markstack + REASONABLE(32);
2362 New(54,scopestack,REASONABLE(32),I32);
2364 scopestack_max = REASONABLE(32);
2366 New(54,savestack,REASONABLE(128),ANY);
2368 savestack_max = REASONABLE(128);
2370 New(54,retstack,REASONABLE(16),OP*);
2372 retstack_max = REASONABLE(16);
2381 while (curstackinfo->si_next)
2382 curstackinfo = curstackinfo->si_next;
2383 while (curstackinfo) {
2384 PERL_SI *p = curstackinfo->si_prev;
2385 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
2386 Safefree(curstackinfo->si_cxstack);
2387 Safefree(curstackinfo);
2390 Safefree(tmps_stack);
2391 Safefree(markstack);
2392 Safefree(scopestack);
2393 Safefree(savestack);
2402 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2415 subname = newSVpv("main",4);
2419 init_predump_symbols(void)
2425 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2426 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2427 GvMULTI_on(stdingv);
2428 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2429 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2431 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2433 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2435 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2437 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2439 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2441 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2442 GvMULTI_on(othergv);
2443 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2444 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2446 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2448 statname = NEWSV(66,0); /* last filename we did stat on */
2451 osname = savepv(OSNAME);
2455 init_postdump_symbols(register int argc, register char **argv, register char **env)
2462 argc--,argv++; /* skip name of script */
2464 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2467 if (argv[0][1] == '-') {
2471 if (s = strchr(argv[0], '=')) {
2473 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2476 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2479 toptarget = NEWSV(0,0);
2480 sv_upgrade(toptarget, SVt_PVFM);
2481 sv_setpvn(toptarget, "", 0);
2482 bodytarget = NEWSV(0,0);
2483 sv_upgrade(bodytarget, SVt_PVFM);
2484 sv_setpvn(bodytarget, "", 0);
2485 formtarget = bodytarget;
2488 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2489 sv_setpv(GvSV(tmpgv),origfilename);
2490 magicname("0", "0", 1);
2492 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2493 sv_setpv(GvSV(tmpgv),origargv[0]);
2494 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2496 (void)gv_AVadd(argvgv);
2497 av_clear(GvAVn(argvgv));
2498 for (; argc > 0; argc--,argv++) {
2499 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2502 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2506 hv_magic(hv, envgv, 'E');
2507 #ifndef VMS /* VMS doesn't have environ array */
2508 /* Note that if the supplied env parameter is actually a copy
2509 of the global environ then it may now point to free'd memory
2510 if the environment has been modified since. To avoid this
2511 problem we treat env==NULL as meaning 'use the default'
2516 environ[0] = Nullch;
2517 for (; *env; env++) {
2518 if (!(s = strchr(*env,'=')))
2524 sv = newSVpv(s--,0);
2525 (void)hv_store(hv, *env, s - *env, sv, 0);
2527 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2528 /* Sins of the RTL. See note in my_setenv(). */
2529 (void)PerlEnv_putenv(savepv(*env));
2533 #ifdef DYNAMIC_ENV_FETCH
2534 HvNAME(hv) = savepv(ENV_HV_NAME);
2538 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2539 sv_setiv(GvSV(tmpgv), (IV)getpid());
2548 s = PerlEnv_getenv("PERL5LIB");
2552 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2554 /* Treat PERL5?LIB as a possible search list logical name -- the
2555 * "natural" VMS idiom for a Unix path string. We allow each
2556 * element to be a set of |-separated directories for compatibility.
2560 if (my_trnlnm("PERL5LIB",buf,0))
2561 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2563 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2567 /* Use the ~-expanded versions of APPLLIB (undocumented),
2568 ARCHLIB PRIVLIB SITEARCH and SITELIB
2571 incpush(APPLLIB_EXP, TRUE);
2575 incpush(ARCHLIB_EXP, FALSE);
2578 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2581 incpush(PRIVLIB_EXP, TRUE);
2583 incpush(PRIVLIB_EXP, FALSE);
2587 incpush(SITEARCH_EXP, FALSE);
2591 incpush(SITELIB_EXP, TRUE);
2593 incpush(SITELIB_EXP, FALSE);
2597 incpush(".", FALSE);
2601 # define PERLLIB_SEP ';'
2604 # define PERLLIB_SEP '|'
2606 # define PERLLIB_SEP ':'
2609 #ifndef PERLLIB_MANGLE
2610 # define PERLLIB_MANGLE(s,n) (s)
2614 incpush(char *p, int addsubdirs)
2616 SV *subdir = Nullsv;
2622 subdir = sv_newmortal();
2623 if (!archpat_auto) {
2624 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2625 + sizeof("//auto"));
2626 New(55, archpat_auto, len, char);
2627 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2629 for (len = sizeof(ARCHNAME) + 2;
2630 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2631 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2636 /* Break at all separators */
2638 SV *libdir = NEWSV(55,0);
2641 /* skip any consecutive separators */
2642 while ( *p == PERLLIB_SEP ) {
2643 /* Uncomment the next line for PATH semantics */
2644 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2648 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2649 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2654 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2655 p = Nullch; /* break out */
2659 * BEFORE pushing libdir onto @INC we may first push version- and
2660 * archname-specific sub-directories.
2663 struct stat tmpstatbuf;
2668 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2670 while (unix[len-1] == '/') len--; /* Cosmetic */
2671 sv_usepvn(libdir,unix,len);
2674 PerlIO_printf(PerlIO_stderr(),
2675 "Failed to unixify @INC element \"%s\"\n",
2678 /* .../archname/version if -d .../archname/version/auto */
2679 sv_setsv(subdir, libdir);
2680 sv_catpv(subdir, archpat_auto);
2681 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2682 S_ISDIR(tmpstatbuf.st_mode))
2683 av_push(GvAVn(incgv),
2684 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2686 /* .../archname if -d .../archname/auto */
2687 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2688 strlen(patchlevel) + 1, "", 0);
2689 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2690 S_ISDIR(tmpstatbuf.st_mode))
2691 av_push(GvAVn(incgv),
2692 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2695 /* finally push this lib directory on the end of @INC */
2696 av_push(GvAVn(incgv), libdir);
2701 STATIC struct perl_thread *
2704 struct perl_thread *thr;
2707 Newz(53, thr, 1, struct perl_thread);
2708 curcop = &compiling;
2709 thr->cvcache = newHV();
2710 thr->threadsv = newAV();
2711 /* thr->threadsvp is set when find_threadsv is called */
2712 thr->specific = newAV();
2713 thr->errhv = newHV();
2714 thr->flags = THRf_R_JOINABLE;
2715 MUTEX_INIT(&thr->mutex);
2716 /* Handcraft thrsv similarly to mess_sv */
2717 New(53, thrsv, 1, SV);
2718 Newz(53, xpv, 1, XPV);
2719 SvFLAGS(thrsv) = SVt_PV;
2720 SvANY(thrsv) = (void*)xpv;
2721 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2722 SvPVX(thrsv) = (char*)thr;
2723 SvCUR_set(thrsv, sizeof(thr));
2724 SvLEN_set(thrsv, sizeof(thr));
2725 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2729 MUTEX_LOCK(&threads_mutex);
2734 MUTEX_UNLOCK(&threads_mutex);
2736 #ifdef HAVE_THREAD_INTERN
2737 init_thread_intern(thr);
2740 #ifdef SET_THREAD_SELF
2741 SET_THREAD_SELF(thr);
2743 thr->self = pthread_self();
2744 #endif /* SET_THREAD_SELF */
2748 * These must come after the SET_THR because sv_setpvn does
2749 * SvTAINT and the taint fields require dTHR.
2751 toptarget = NEWSV(0,0);
2752 sv_upgrade(toptarget, SVt_PVFM);
2753 sv_setpvn(toptarget, "", 0);
2754 bodytarget = NEWSV(0,0);
2755 sv_upgrade(bodytarget, SVt_PVFM);
2756 sv_setpvn(bodytarget, "", 0);
2757 formtarget = bodytarget;
2758 thr->errsv = newSVpv("", 0);
2759 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2762 #endif /* USE_THREADS */
2765 call_list(I32 oldscope, AV *paramList)
2768 line_t oldline = curcop->cop_line;
2773 while (AvFILL(paramList) >= 0) {
2774 CV *cv = (CV*)av_shift(paramList);
2783 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2784 (void)SvPV(atsv, len);
2787 curcop = &compiling;
2788 curcop->cop_line = oldline;
2789 if (paramList == beginav)
2790 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2792 sv_catpv(atsv, "END failed--cleanup aborted");
2793 while (scopestack_ix > oldscope)
2795 croak("%s", SvPVX(atsv));
2803 /* my_exit() was called */
2804 while (scopestack_ix > oldscope)
2807 curstash = defstash;
2809 call_list(oldscope, endav);
2811 curcop = &compiling;
2812 curcop->cop_line = oldline;
2814 if (paramList == beginav)
2815 croak("BEGIN failed--compilation aborted");
2817 croak("END failed--cleanup aborted");
2823 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2828 curcop = &compiling;
2829 curcop->cop_line = oldline;
2842 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2843 thr, (unsigned long) status));
2844 #endif /* USE_THREADS */
2853 STATUS_NATIVE_SET(status);
2860 my_failure_exit(void)
2863 if (vaxc$errno & 1) {
2864 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2865 STATUS_NATIVE_SET(44);
2868 if (!vaxc$errno && errno) /* unlikely */
2869 STATUS_NATIVE_SET(44);
2871 STATUS_NATIVE_SET(vaxc$errno);
2876 STATUS_POSIX_SET(errno);
2878 exitstatus = STATUS_POSIX >> 8;
2879 if (exitstatus & 255)
2880 STATUS_POSIX_SET(exitstatus);
2882 STATUS_POSIX_SET(255);
2892 register PERL_CONTEXT *cx;
2897 SvREFCNT_dec(e_script);
2901 POPSTACK_TO(mainstack);
2902 if (cxstack_ix >= 0) {
2917 read_e_script(CPerlObj *pPerl, int idx, SV *buf_sv, int maxlen)
2919 read_e_script(int idx, SV *buf_sv, int maxlen)
2923 p = SvPVX(e_script);
2924 nl = strchr(p, '\n');
2925 nl = (nl) ? nl+1 : SvEND(e_script);
2928 sv_catpvn(buf_sv, p, nl-p);
2929 sv_chop(e_script, nl);