3 * Copyright (c) 1987-1998 Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
16 #include "patchlevel.h"
18 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
23 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
24 char *getenv _((char *)); /* Usually in <stdlib.h> */
34 dEXTCONST char rcsid[] = "perl.c\nPatch level: ###\n";
42 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
49 static I32 read_e_script _((CPerlObj* pPerl, int idx, SV *buf_sv, int maxlen));
51 static void find_beginning _((void));
52 static void forbid_setid _((char *));
53 static void incpush _((char *, int));
54 static void init_interp _((void));
55 static void init_ids _((void));
56 static void init_debugger _((void));
57 static void init_lexer _((void));
58 static void init_main_stash _((void));
60 static struct perl_thread * init_main_thread _((void));
61 #endif /* USE_THREADS */
62 static void init_perllib _((void));
63 static void init_postdump_symbols _((int, char **, char **));
64 static void init_predump_symbols _((void));
65 static void my_exit_jump _((void)) __attribute__((noreturn));
66 static void nuke_stacks _((void));
67 static void open_script _((char *, bool, SV *, int *fd));
68 static void usage _((char *));
69 static void validate_suid _((char *, char*, int));
70 static I32 read_e_script _((int idx, SV *buf_sv, int maxlen));
74 CPerlObj* perl_alloc(IPerlMem* ipM, IPerlEnv* ipE, IPerlStdIO* ipStd,
75 IPerlLIO* ipLIO, IPerlDir* ipD, IPerlSock* ipS, IPerlProc* ipP)
77 CPerlObj* pPerl = new(ipM) CPerlObj(ipM, ipE, ipStd, ipLIO, ipD, ipS, ipP);
87 PerlInterpreter *sv_interp;
90 New(53, sv_interp, 1, PerlInterpreter);
93 #endif /* PERL_OBJECT */
97 CPerlObj::perl_construct(void)
99 perl_construct(register PerlInterpreter *sv_interp)
105 struct perl_thread *thr;
106 #endif /* FAKE_THREADS */
107 #endif /* USE_THREADS */
110 if (!(curinterp = sv_interp))
116 Zero(sv_interp, 1, PerlInterpreter);
119 /* Init the real globals (and main thread)? */
124 #ifdef ALLOC_THREAD_KEY
127 if (pthread_key_create(&thr_key, 0))
128 croak("panic: pthread_key_create");
130 MUTEX_INIT(&sv_mutex);
132 * Safe to use basic SV functions from now on (though
133 * not things like mortals or tainting yet).
135 MUTEX_INIT(&eval_mutex);
136 COND_INIT(&eval_cond);
137 MUTEX_INIT(&threads_mutex);
138 COND_INIT(&nthreads_cond);
139 #ifdef EMULATE_ATOMIC_REFCOUNTS
140 MUTEX_INIT(&svref_mutex);
141 #endif /* EMULATE_ATOMIC_REFCOUNTS */
143 thr = init_main_thread();
144 #endif /* USE_THREADS */
146 linestr = NEWSV(65,79);
147 sv_upgrade(linestr,SVt_PVIV);
149 if (!SvREADONLY(&sv_undef)) {
150 /* set read-only and try to insure than we wont see REFCNT==0
153 SvREADONLY_on(&sv_undef);
154 SvREFCNT(&sv_undef) = (~(U32)0)/2;
158 SvREADONLY_on(&sv_no);
159 SvREFCNT(&sv_no) = (~(U32)0)/2;
161 sv_setpv(&sv_yes,Yes);
163 SvREADONLY_on(&sv_yes);
164 SvREFCNT(&sv_yes) = (~(U32)0)/2;
167 nrs = newSVpv("\n", 1);
168 rs = SvREFCNT_inc(nrs);
172 /* sighandlerp = sighandler; */
174 sighandlerp = sighandler;
180 * There is no way we can refer to them from Perl so close them to save
181 * space. The other alternative would be to provide STDAUX and STDPRN
184 (void)fclose(stdaux);
185 (void)fclose(stdprn);
192 perl_destruct_level = 1;
194 if (perl_destruct_level > 0)
199 lex_state = LEX_NOTPARSING;
201 start_env.je_prev = NULL;
202 start_env.je_ret = -1;
203 start_env.je_mustcatch = TRUE;
204 top_env = &start_env;
207 SET_NUMERIC_STANDARD();
208 #if defined(SUBVERSION) && SUBVERSION > 0
209 sprintf(patchlevel, "%7.5f", (double) 5
210 + ((double) PATCHLEVEL / (double) 1000)
211 + ((double) SUBVERSION / (double) 100000));
213 sprintf(patchlevel, "%5.3f", (double) 5 +
214 ((double) PATCHLEVEL / (double) 1000));
217 #if defined(LOCAL_PATCH_COUNT)
218 localpatches = local_patches; /* For possible -v */
221 PerlIO_init(); /* Hook to IO system */
223 fdpid = newAV(); /* for remembering popen pids by fd */
224 modglobal = newHV(); /* pointers to per-interpreter module globals */
227 New(51,debname,128,char);
228 New(52,debdelim,128,char);
236 CPerlObj::perl_destruct(void)
238 perl_destruct(register PerlInterpreter *sv_interp)
242 int destruct_level; /* 0=none, 1=full, 2=full with checks */
247 #endif /* USE_THREADS */
250 if (!(curinterp = sv_interp))
256 /* Pass 1 on any remaining threads: detach joinables, join zombies */
258 MUTEX_LOCK(&threads_mutex);
259 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
260 "perl_destruct: waiting for %d threads...\n",
262 for (t = thr->next; t != thr; t = t->next) {
263 MUTEX_LOCK(&t->mutex);
264 switch (ThrSTATE(t)) {
267 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
268 "perl_destruct: joining zombie %p\n", t));
269 ThrSETSTATE(t, THRf_DEAD);
270 MUTEX_UNLOCK(&t->mutex);
273 * The SvREFCNT_dec below may take a long time (e.g. av
274 * may contain an object scalar whose destructor gets
275 * called) so we have to unlock threads_mutex and start
278 MUTEX_UNLOCK(&threads_mutex);
280 SvREFCNT_dec((SV*)av);
281 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
282 "perl_destruct: joined zombie %p OK\n", t));
284 case THRf_R_JOINABLE:
285 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
286 "perl_destruct: detaching thread %p\n", t));
287 ThrSETSTATE(t, THRf_R_DETACHED);
289 * We unlock threads_mutex and t->mutex in the opposite order
290 * from which we locked them just so that DETACH won't
291 * deadlock if it panics. It's only a breach of good style
292 * not a bug since they are unlocks not locks.
294 MUTEX_UNLOCK(&threads_mutex);
296 MUTEX_UNLOCK(&t->mutex);
299 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
300 "perl_destruct: ignoring %p (state %u)\n",
302 MUTEX_UNLOCK(&t->mutex);
303 /* fall through and out */
306 /* We leave the above "Pass 1" loop with threads_mutex still locked */
308 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
311 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
312 "perl_destruct: final wait for %d threads\n",
314 COND_WAIT(&nthreads_cond, &threads_mutex);
316 /* At this point, we're the last thread */
317 MUTEX_UNLOCK(&threads_mutex);
318 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
319 MUTEX_DESTROY(&threads_mutex);
320 COND_DESTROY(&nthreads_cond);
321 #endif /* !defined(FAKE_THREADS) */
322 #endif /* USE_THREADS */
324 destruct_level = perl_destruct_level;
328 if (s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL")) {
330 if (destruct_level < i)
343 /* We must account for everything. */
345 /* Destroy the main CV and syntax tree */
347 curpad = AvARRAY(comppad);
353 SvREFCNT_dec(main_cv);
358 * Try to destruct global references. We do this first so that the
359 * destructors and destructees still exist. Some sv's might remain.
360 * Non-referenced objects are on their own.
367 /* unhook hooks which will soon be, or use, destroyed data */
368 SvREFCNT_dec(warnhook);
370 SvREFCNT_dec(diehook);
372 SvREFCNT_dec(parsehook);
375 /* call exit list functions */
376 while (exitlistlen-- > 0)
377 exitlist[exitlistlen].fn(PERL_OBJECT_THIS_ exitlist[exitlistlen].ptr);
381 if (destruct_level == 0){
383 DEBUG_P(debprofdump());
385 /* The exit() function will do everything that needs doing. */
389 /* loosen bonds of global variables */
392 (void)PerlIO_close(rsfp);
396 /* Filters for program text */
397 SvREFCNT_dec(rsfp_filters);
398 rsfp_filters = Nullav;
410 sawampersand = FALSE; /* must save all match strings */
411 sawstudy = FALSE; /* do fbm_instr on all strings */
419 SvREFCNT_dec(e_script);
423 /* magical thingies */
425 Safefree(ofs); /* $, */
428 Safefree(ors); /* $\ */
431 SvREFCNT_dec(nrs); /* $\ helper */
434 multiline = 0; /* $* */
436 SvREFCNT_dec(statname);
440 /* defgv, aka *_ should be taken care of elsewhere */
442 /* clean up after study() */
443 SvREFCNT_dec(lastscream);
445 Safefree(screamfirst);
447 Safefree(screamnext);
450 /* startup and shutdown function lists */
451 SvREFCNT_dec(beginav);
453 SvREFCNT_dec(initav);
458 /* shortcuts just get cleared */
470 /* reset so print() ends up where we expect */
473 /* Prepare to destruct main symbol table. */
480 if (destruct_level >= 2) {
481 if (scopestack_ix != 0)
482 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
483 (long)scopestack_ix);
484 if (savestack_ix != 0)
485 warn("Unbalanced saves: %ld more saves than restores\n",
487 if (tmps_floor != -1)
488 warn("Unbalanced tmps: %ld more allocs than frees\n",
489 (long)tmps_floor + 1);
490 if (cxstack_ix != -1)
491 warn("Unbalanced context: %ld more PUSHes than POPs\n",
492 (long)cxstack_ix + 1);
495 /* Now absolutely destruct everything, somehow or other, loops or no. */
497 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
498 while (sv_count != 0 && sv_count != last_sv_count) {
499 last_sv_count = sv_count;
502 SvFLAGS(strtab) &= ~SVTYPEMASK;
503 SvFLAGS(strtab) |= SVt_PVHV;
505 /* Destruct the global string table. */
507 /* Yell and reset the HeVAL() slots that are still holding refcounts,
508 * so that sv_free() won't fail on them.
517 array = HvARRAY(strtab);
521 warn("Unbalanced string table refcount: (%d) for \"%s\"",
522 HeVAL(hent) - Nullsv, HeKEY(hent));
523 HeVAL(hent) = Nullsv;
533 SvREFCNT_dec(strtab);
536 warn("Scalars leaked: %ld\n", (long)sv_count);
540 /* No SVs have survived, need to clean out */
543 Safefree(origfilename);
544 Safefree(archpat_auto);
545 Safefree(reg_start_tmp);
546 Safefree(HeKEY_hek(&hv_fetch_ent_mh));
549 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
551 DEBUG_P(debprofdump());
553 MUTEX_DESTROY(&sv_mutex);
554 MUTEX_DESTROY(&eval_mutex);
555 COND_DESTROY(&eval_cond);
557 /* As the penultimate thing, free the non-arena SV for thrsv */
558 Safefree(SvPVX(thrsv));
559 Safefree(SvANY(thrsv));
562 #endif /* USE_THREADS */
564 /* As the absolutely last thing, free the non-arena SV for mess() */
567 /* we know that type >= SVt_PV */
569 Safefree(SvPVX(mess_sv));
570 Safefree(SvANY(mess_sv));
578 CPerlObj::perl_free(void)
580 perl_free(PerlInterpreter *sv_interp)
586 if (!(curinterp = sv_interp))
594 CPerlObj::perl_atexit(void (*fn) (CPerlObj*,void *), void *ptr)
596 perl_atexit(void (*fn) (void *), void *ptr)
599 Renew(exitlist, exitlistlen+1, PerlExitListEntry);
600 exitlist[exitlistlen].fn = fn;
601 exitlist[exitlistlen].ptr = ptr;
607 CPerlObj::perl_parse(void (*xsinit) (CPerlObj*), int argc, char **argv, char **env)
609 perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char **argv, char **env)
615 char *scriptname = NULL;
616 VOL bool dosearch = FALSE;
624 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
627 croak("suidperl is no longer needed since the kernel can now execute\n\
628 setuid perl scripts securely.\n");
633 if (!(curinterp = sv_interp))
637 #if defined(NeXT) && defined(__DYNAMIC__)
638 _dyld_lookup_and_bind
639 ("__environ", (unsigned long *) &environ_pointer, NULL);
644 #ifndef VMS /* VMS doesn't have environ array */
645 origenviron = environ;
650 /* Come here if running an undumped a.out. */
652 origfilename = savepv(argv[0]);
654 cxstack_ix = -1; /* start label stack again */
656 init_postdump_symbols(argc,argv,env);
661 curpad = AvARRAY(comppad);
666 SvREFCNT_dec(main_cv);
670 oldscope = scopestack_ix;
678 /* my_exit() was called */
679 while (scopestack_ix > oldscope)
684 call_list(oldscope, endav);
686 return STATUS_NATIVE_EXPORT;
689 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
693 sv_setpvn(linestr,"",0);
694 sv = newSVpv("",0); /* first used for -I flags */
698 for (argc--,argv++; argc > 0; argc--,argv++) {
699 if (argv[0][0] != '-' || !argv[0][1])
703 validarg = " PHOOEY ";
729 if (s = moreswitches(s))
739 if (euid != uid || egid != gid)
740 croak("No -e allowed in setuid scripts");
742 e_script = newSVpv("",0);
743 filter_add(read_e_script, NULL);
746 sv_catpv(e_script, s);
748 sv_catpv(e_script, argv[1]);
752 croak("No code specified for -e");
753 sv_catpv(e_script, "\n");
756 case 'I': /* -I handled both here and in moreswitches() */
758 if (!*++s && (s=argv[1]) != Nullch) {
761 while (s && isSPACE(*s))
765 for (e = s; *e && !isSPACE(*e); e++) ;
772 } /* XXX else croak? */
786 preambleav = newAV();
787 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
789 Sv = newSVpv("print myconfig();",0);
791 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
793 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
795 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
796 sv_catpv(Sv,"\" Compile-time options:");
798 sv_catpv(Sv," DEBUGGING");
801 sv_catpv(Sv," NO_EMBED");
804 sv_catpv(Sv," MULTIPLICITY");
806 sv_catpv(Sv,"\\n\",");
808 #if defined(LOCAL_PATCH_COUNT)
809 if (LOCAL_PATCH_COUNT > 0) {
811 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
812 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
814 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
818 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
821 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
823 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
828 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
829 print \" \\%ENV:\\n @env\\n\" if @env; \
830 print \" \\@INC:\\n @INC\\n\";");
833 Sv = newSVpv("config_vars(qw(",0);
838 av_push(preambleav, Sv);
839 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
850 if (!*++s || isSPACE(*s)) {
854 /* catch use of gnu style long options */
855 if (strEQ(s, "version")) {
859 if (strEQ(s, "help")) {
866 croak("Unrecognized switch: -%s (-h will show valid options)",s);
871 if (!tainting && (s = PerlEnv_getenv("PERL5OPT"))) {
882 if (!strchr("DIMUdmw", *s))
883 croak("Illegal switch in PERL5OPT: -%c", *s);
889 scriptname = argv[0];
892 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
894 else if (scriptname == Nullch) {
896 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
904 open_script(scriptname,dosearch,sv,&fdscript);
906 validate_suid(validarg, scriptname,fdscript);
911 main_cv = compcv = (CV*)NEWSV(1104,0);
912 sv_upgrade((SV *)compcv, SVt_PVCV);
916 av_push(comppad, Nullsv);
917 curpad = AvARRAY(comppad);
918 comppad_name = newAV();
919 comppad_name_fill = 0;
920 min_intro_pending = 0;
923 av_store(comppad_name, 0, newSVpv("@_", 2));
924 curpad[0] = (SV*)newAV();
925 SvPADMY_on(curpad[0]); /* XXX Needed? */
927 New(666, CvMUTEXP(compcv), 1, perl_mutex);
928 MUTEX_INIT(CvMUTEXP(compcv));
929 #endif /* USE_THREADS */
931 comppadlist = newAV();
932 AvREAL_off(comppadlist);
933 av_store(comppadlist, 0, (SV*)comppad_name);
934 av_store(comppadlist, 1, (SV*)comppad);
935 CvPADLIST(compcv) = comppadlist;
937 boot_core_UNIVERSAL();
940 (*xsinit)(PERL_OBJECT_THIS); /* in case linked C routines want magical variables */
941 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
945 init_predump_symbols();
946 /* init_postdump_symbols not currently designed to be called */
947 /* more than once (ENV isn't cleared first, for example) */
948 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
950 init_postdump_symbols(argc,argv,env);
954 /* now parse the script */
956 SETERRNO(0,SS$_NORMAL);
958 if (yyparse() || error_count) {
960 croak("%s had compilation errors.\n", origfilename);
962 croak("Execution of %s aborted due to compilation errors.\n",
966 curcop->cop_line = 0;
970 SvREFCNT_dec(e_script);
974 /* now that script is parsed, we can modify record separator */
976 rs = SvREFCNT_inc(nrs);
977 sv_setsv(perl_get_sv("/", TRUE), rs);
988 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
989 dump_mstats("after compilation:");
1000 CPerlObj::perl_run(void)
1002 perl_run(PerlInterpreter *sv_interp)
1011 if (!(curinterp = sv_interp))
1015 oldscope = scopestack_ix;
1020 cxstack_ix = -1; /* start context stack again */
1023 /* my_exit() was called */
1024 while (scopestack_ix > oldscope)
1027 curstash = defstash;
1029 call_list(oldscope, endav);
1031 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1032 dump_mstats("after execution: ");
1035 return STATUS_NATIVE_EXPORT;
1038 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1043 POPSTACK_TO(mainstack);
1047 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1048 sawampersand ? "Enabling" : "Omitting"));
1051 DEBUG_x(dump_all());
1052 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1054 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1055 (unsigned long) thr));
1056 #endif /* USE_THREADS */
1059 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1062 if (PERLDB_SINGLE && DBsingle)
1063 sv_setiv(DBsingle, 1);
1065 call_list(oldscope, initav);
1075 else if (main_start) {
1076 CvDEPTH(main_cv) = 1;
1087 perl_get_sv(char *name, I32 create)
1091 if (name[1] == '\0' && !isALPHA(name[0])) {
1092 PADOFFSET tmp = find_threadsv(name);
1093 if (tmp != NOT_IN_PAD) {
1095 return THREADSV(tmp);
1098 #endif /* USE_THREADS */
1099 gv = gv_fetchpv(name, create, SVt_PV);
1106 perl_get_av(char *name, I32 create)
1108 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1117 perl_get_hv(char *name, I32 create)
1119 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1128 perl_get_cv(char *name, I32 create)
1130 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1131 if (create && !GvCVu(gv))
1132 return newSUB(start_subparse(FALSE, 0),
1133 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1141 /* Be sure to refetch the stack pointer after calling these routines. */
1144 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1146 /* See G_* flags in cop.h */
1147 /* null terminated arg list */
1154 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1159 return perl_call_pv(sub_name, flags);
1163 perl_call_pv(char *sub_name, I32 flags)
1164 /* name of the subroutine */
1165 /* See G_* flags in cop.h */
1167 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1171 perl_call_method(char *methname, I32 flags)
1172 /* name of the subroutine */
1173 /* See G_* flags in cop.h */
1179 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1184 return perl_call_sv(*stack_sp--, flags);
1187 /* May be called with any of a CV, a GV, or an SV containing the name. */
1189 perl_call_sv(SV *sv, I32 flags)
1191 /* See G_* flags in cop.h */
1194 LOGOP myop; /* fake syntax tree node */
1198 bool oldcatch = CATCH_GET;
1203 if (flags & G_DISCARD) {
1208 Zero(&myop, 1, LOGOP);
1209 myop.op_next = Nullop;
1210 if (!(flags & G_NOARGS))
1211 myop.op_flags |= OPf_STACKED;
1212 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1213 (flags & G_ARRAY) ? OPf_WANT_LIST :
1218 EXTEND(stack_sp, 1);
1221 oldscope = scopestack_ix;
1223 if (PERLDB_SUB && curstash != debstash
1224 /* Handle first BEGIN of -d. */
1225 && (DBcv || (DBcv = GvCV(DBsub)))
1226 /* Try harder, since this may have been a sighandler, thus
1227 * curstash may be meaningless. */
1228 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash)
1229 && !(flags & G_NODEBUG))
1230 op->op_private |= OPpENTERSUB_DB;
1232 if (flags & G_EVAL) {
1233 cLOGOP->op_other = op;
1235 /* we're trying to emulate pp_entertry() here */
1237 register PERL_CONTEXT *cx;
1238 I32 gimme = GIMME_V;
1243 push_return(op->op_next);
1244 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1246 eval_root = op; /* Only needed so that goto works right. */
1249 if (flags & G_KEEPERR)
1264 /* my_exit() was called */
1265 curstash = defstash;
1269 croak("Callback called exit");
1278 stack_sp = stack_base + oldmark;
1279 if (flags & G_ARRAY)
1283 *++stack_sp = &sv_undef;
1291 if (op == (OP*)&myop)
1292 op = pp_entersub(ARGS);
1295 retval = stack_sp - (stack_base + oldmark);
1296 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1300 if (flags & G_EVAL) {
1301 if (scopestack_ix > oldscope) {
1305 register PERL_CONTEXT *cx;
1317 CATCH_SET(oldcatch);
1319 if (flags & G_DISCARD) {
1320 stack_sp = stack_base + oldmark;
1329 /* Eval a string. The G_EVAL flag is always assumed. */
1332 perl_eval_sv(SV *sv, I32 flags)
1334 /* See G_* flags in cop.h */
1337 UNOP myop; /* fake syntax tree node */
1338 I32 oldmark = SP - stack_base;
1345 if (flags & G_DISCARD) {
1353 EXTEND(stack_sp, 1);
1355 oldscope = scopestack_ix;
1357 if (!(flags & G_NOARGS))
1358 myop.op_flags = OPf_STACKED;
1359 myop.op_next = Nullop;
1360 myop.op_type = OP_ENTEREVAL;
1361 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1362 (flags & G_ARRAY) ? OPf_WANT_LIST :
1364 if (flags & G_KEEPERR)
1365 myop.op_flags |= OPf_SPECIAL;
1375 /* my_exit() was called */
1376 curstash = defstash;
1380 croak("Callback called exit");
1389 stack_sp = stack_base + oldmark;
1390 if (flags & G_ARRAY)
1394 *++stack_sp = &sv_undef;
1399 if (op == (OP*)&myop)
1400 op = pp_entereval(ARGS);
1403 retval = stack_sp - (stack_base + oldmark);
1404 if (!(flags & G_KEEPERR))
1409 if (flags & G_DISCARD) {
1410 stack_sp = stack_base + oldmark;
1420 perl_eval_pv(char *p, I32 croak_on_error)
1423 SV* sv = newSVpv(p, 0);
1426 perl_eval_sv(sv, G_SCALAR);
1433 if (croak_on_error && SvTRUE(ERRSV))
1434 croak(SvPVx(ERRSV, na));
1439 /* Require a module. */
1442 perl_require_pv(char *pv)
1446 PUSHSTACKi(SI_REQUIRE);
1448 sv = sv_newmortal();
1449 sv_setpv(sv, "require '");
1452 perl_eval_sv(sv, G_DISCARD);
1458 magicname(char *sym, char *name, I32 namlen)
1462 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1463 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1467 usage(char *name) /* XXX move this out into a module ? */
1470 /* This message really ought to be max 23 lines.
1471 * Removed -h because the user already knows that opton. Others? */
1473 static char *usage_msg[] = {
1474 "-0[octal] specify record separator (\\0, if no argument)",
1475 "-a autosplit mode with -n or -p (splits $_ into @F)",
1476 "-c check syntax only (runs BEGIN and END blocks)",
1477 "-d[:debugger] run scripts under debugger",
1478 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1479 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1480 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1481 "-i[extension] edit <> files in place (make backup if extension supplied)",
1482 "-Idirectory specify @INC/#include directory (may be used more than once)",
1483 "-l[octal] enable line ending processing, specifies line terminator",
1484 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1485 "-n assume 'while (<>) { ... }' loop around your script",
1486 "-p assume loop like -n but print line also like sed",
1487 "-P run script through C preprocessor before compilation",
1488 "-s enable some switch parsing for switches after script name",
1489 "-S look for the script using PATH environment variable",
1490 "-T turn on tainting checks",
1491 "-u dump core after parsing script",
1492 "-U allow unsafe operations",
1493 "-v print version number, patchlevel plus VERY IMPORTANT perl info",
1494 "-V[:variable] print perl configuration information",
1495 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1496 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1500 char **p = usage_msg;
1502 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1504 printf("\n %s", *p++);
1507 /* This routine handles any switches that can be given during run */
1510 moreswitches(char *s)
1519 rschar = scan_oct(s, 4, &numlen);
1521 if (rschar & ~((U8)~0))
1523 else if (!rschar && numlen >= 2)
1524 nrs = newSVpv("", 0);
1527 nrs = newSVpv(&ch, 1);
1533 splitstr = savepv(s + 1);
1547 if (*s == ':' || *s == '=') {
1548 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1552 perldb = PERLDB_ALL;
1559 if (isALPHA(s[1])) {
1560 static char debopts[] = "psltocPmfrxuLHXD";
1563 for (s++; *s && (d = strchr(debopts,*s)); s++)
1564 debug |= 1 << (d - debopts);
1568 for (s++; isDIGIT(*s); s++) ;
1570 debug |= 0x80000000;
1572 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1573 for (s++; isALNUM(*s); s++) ;
1583 inplace = savepv(s+1);
1585 for (s = inplace; *s && !isSPACE(*s); s++) ;
1588 if (*s == '-') /* Additional switches on #! line. */
1592 case 'I': /* -I handled both here and in parse_perl() */
1595 while (*s && isSPACE(*s))
1599 for (e = s; *e && !isSPACE(*e); e++) ;
1600 p = savepvn(s, e-s);
1606 croak("No space allowed after -I");
1616 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1626 ors = SvPV(nrs, orslen);
1627 ors = savepvn(ors, orslen);
1631 forbid_setid("-M"); /* XXX ? */
1634 forbid_setid("-m"); /* XXX ? */
1639 /* -M-foo == 'no foo' */
1640 if (*s == '-') { use = "no "; ++s; }
1641 sv = newSVpv(use,0);
1643 /* We allow -M'Module qw(Foo Bar)' */
1644 while(isALNUM(*s) || *s==':') ++s;
1646 sv_catpv(sv, start);
1647 if (*(start-1) == 'm') {
1649 croak("Can't use '%c' after -mname", *s);
1650 sv_catpv( sv, " ()");
1653 sv_catpvn(sv, start, s-start);
1654 sv_catpv(sv, " split(/,/,q{");
1659 if (preambleav == NULL)
1660 preambleav = newAV();
1661 av_push(preambleav, sv);
1664 croak("No space allowed after -%c", *(s-1));
1681 croak("Too late for \"-T\" option");
1693 #if defined(SUBVERSION) && SUBVERSION > 0
1694 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1695 PATCHLEVEL, SUBVERSION, ARCHNAME);
1697 printf("\nThis is perl, version %s built for %s",
1698 patchlevel, ARCHNAME);
1700 #if defined(LOCAL_PATCH_COUNT)
1701 if (LOCAL_PATCH_COUNT > 0)
1702 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1703 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1706 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1708 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1711 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1712 printf("djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1998\n");
1715 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1716 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1719 printf("atariST series port, ++jrb bammi@cadence.com\n");
1722 Perl may be copied only under the terms of either the Artistic License or the\n\
1723 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\
1724 Complete documentation for Perl, including FAQ lists, should be found on\n\
1725 this system using `man perl' or `perldoc perl'. If you have access to the\n\
1726 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
1734 if (s[1] == '-') /* Additional switches on #! line. */
1745 #ifdef ALTERNATE_SHEBANG
1746 case 'S': /* OS/2 needs -S on "extproc" line. */
1754 croak("Can't emulate -%.1s on #! line",s);
1759 /* compliments of Tom Christiansen */
1761 /* unexec() can be found in the Gnu emacs distribution */
1762 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
1773 prog = newSVpv(BIN_EXP, 0);
1774 sv_catpv(prog, "/perl");
1775 file = newSVpv(origfilename, 0);
1776 sv_catpv(file, ".perldump");
1778 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1779 /* unexec prints msg to stderr in case of failure */
1780 PerlProc_exit(status);
1783 # include <lib$routines.h>
1784 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1786 ABORT(); /* for use with undump */
1791 /* initialize curinterp */
1796 #ifdef PERL_OBJECT /* XXX kludge */
1801 curcop = &compiling; \
1806 laststype = OP_STAT; \
1808 maxsysfd = MAXSYSFD; \
1809 statname = Nullsv; \
1815 laststype = OP_STAT; \
1822 in_clean_objs = FALSE; \
1823 in_clean_all= FALSE; \
1824 profiledata = NULL; \
1826 rsfp_filters= Nullav; \
1830 # ifdef MULTIPLICITY
1831 # define PERLVAR(var,type)
1832 # define PERLVARI(var,type,init) curinterp->var = init;
1833 # define PERLVARIC(var,type,init) curinterp->var = init;
1834 # include "intrpvar.h"
1835 # ifndef USE_THREADS
1836 # include "thrdvar.h"
1842 # define PERLVAR(var,type)
1843 # define PERLVARI(var,type,init) var = init;
1844 # define PERLVARIC(var,type,init) var = init;
1845 # include "intrpvar.h"
1846 # ifndef USE_THREADS
1847 # include "thrdvar.h"
1858 init_main_stash(void)
1863 /* Note that strtab is a rather special HV. Assumptions are made
1864 about not iterating on it, and not adding tie magic to it.
1865 It is properly deallocated in perl_destruct() */
1867 HvSHAREKEYS_off(strtab); /* mandatory */
1868 hv_ksplit(strtab, 512);
1870 curstash = defstash = newHV();
1871 curstname = newSVpv("main",4);
1872 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1873 SvREFCNT_dec(GvHV(gv));
1874 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1876 HvNAME(defstash) = savepv("main");
1877 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1879 hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */
1881 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1882 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1884 replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */
1886 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1887 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1888 sv_setpvn(ERRSV, "", 0);
1889 curstash = defstash;
1890 compiling.cop_stash = defstash;
1891 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1892 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1893 /* We must init $/ before switches are processed. */
1894 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1898 open_script(char *scriptname, bool dosearch, SV *sv, int *fdscript)
1903 /* scriptname will be non-NULL if find_script() returns */
1904 scriptname = find_script(scriptname, dosearch, NULL, 1);
1906 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1907 char *s = scriptname + 8;
1908 *fdscript = atoi(s);
1916 origfilename = (e_script ? savepv("-e") : scriptname);
1917 curcop->cop_filegv = gv_fetchfile(origfilename);
1918 if (strEQ(origfilename,"-"))
1920 if (*fdscript >= 0) {
1921 rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1922 #if defined(HAS_FCNTL) && defined(F_SETFD)
1924 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1927 else if (preprocess) {
1928 char *cpp_cfg = CPPSTDIN;
1929 SV *cpp = newSVpv("",0);
1930 SV *cmd = NEWSV(0,0);
1932 if (strEQ(cpp_cfg, "cppstdin"))
1933 sv_catpvf(cpp, "%s/", BIN_EXP);
1934 sv_catpv(cpp, cpp_cfg);
1937 sv_catpv(sv,PRIVLIB_EXP);
1941 sed %s -e \"/^[^#]/b\" \
1942 -e \"/^#[ ]*include[ ]/b\" \
1943 -e \"/^#[ ]*define[ ]/b\" \
1944 -e \"/^#[ ]*if[ ]/b\" \
1945 -e \"/^#[ ]*ifdef[ ]/b\" \
1946 -e \"/^#[ ]*ifndef[ ]/b\" \
1947 -e \"/^#[ ]*else/b\" \
1948 -e \"/^#[ ]*elif[ ]/b\" \
1949 -e \"/^#[ ]*undef[ ]/b\" \
1950 -e \"/^#[ ]*endif/b\" \
1953 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1956 %s %s -e '/^[^#]/b' \
1957 -e '/^#[ ]*include[ ]/b' \
1958 -e '/^#[ ]*define[ ]/b' \
1959 -e '/^#[ ]*if[ ]/b' \
1960 -e '/^#[ ]*ifdef[ ]/b' \
1961 -e '/^#[ ]*ifndef[ ]/b' \
1962 -e '/^#[ ]*else/b' \
1963 -e '/^#[ ]*elif[ ]/b' \
1964 -e '/^#[ ]*undef[ ]/b' \
1965 -e '/^#[ ]*endif/b' \
1973 (doextract ? "-e '1,/^#/d\n'" : ""),
1975 scriptname, cpp, sv, CPPMINUS);
1977 #ifdef IAMSUID /* actually, this is caught earlier */
1978 if (euid != uid && !euid) { /* if running suidperl */
1980 (void)seteuid(uid); /* musn't stay setuid root */
1983 (void)setreuid((Uid_t)-1, uid);
1985 #ifdef HAS_SETRESUID
1986 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
1988 PerlProc_setuid(uid);
1992 if (PerlProc_geteuid() != uid)
1993 croak("Can't do seteuid!\n");
1995 #endif /* IAMSUID */
1996 rsfp = PerlProc_popen(SvPVX(cmd), "r");
2000 else if (!*scriptname) {
2001 forbid_setid("program input from stdin");
2002 rsfp = PerlIO_stdin();
2005 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2006 #if defined(HAS_FCNTL) && defined(F_SETFD)
2008 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2013 #ifndef IAMSUID /* in case script is not readable before setuid */
2014 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2015 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2017 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2018 croak("Can't do setuid\n");
2022 croak("Can't open perl script \"%s\": %s\n",
2023 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2028 validate_suid(char *validarg, char *scriptname, int fdscript)
2032 /* do we need to emulate setuid on scripts? */
2034 /* This code is for those BSD systems that have setuid #! scripts disabled
2035 * in the kernel because of a security problem. Merely defining DOSUID
2036 * in perl will not fix that problem, but if you have disabled setuid
2037 * scripts in the kernel, this will attempt to emulate setuid and setgid
2038 * on scripts that have those now-otherwise-useless bits set. The setuid
2039 * root version must be called suidperl or sperlN.NNN. If regular perl
2040 * discovers that it has opened a setuid script, it calls suidperl with
2041 * the same argv that it had. If suidperl finds that the script it has
2042 * just opened is NOT setuid root, it sets the effective uid back to the
2043 * uid. We don't just make perl setuid root because that loses the
2044 * effective uid we had before invoking perl, if it was different from the
2047 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2048 * be defined in suidperl only. suidperl must be setuid root. The
2049 * Configure script will set this up for you if you want it.
2056 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2057 croak("Can't stat script \"%s\"",origfilename);
2058 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2062 #ifndef HAS_SETREUID
2063 /* On this access check to make sure the directories are readable,
2064 * there is actually a small window that the user could use to make
2065 * filename point to an accessible directory. So there is a faint
2066 * chance that someone could execute a setuid script down in a
2067 * non-accessible directory. I don't know what to do about that.
2068 * But I don't think it's too important. The manual lies when
2069 * it says access() is useful in setuid programs.
2071 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2072 croak("Permission denied");
2074 /* If we can swap euid and uid, then we can determine access rights
2075 * with a simple stat of the file, and then compare device and
2076 * inode to make sure we did stat() on the same file we opened.
2077 * Then we just have to make sure he or she can execute it.
2080 struct stat tmpstatbuf;
2084 setreuid(euid,uid) < 0
2087 setresuid(euid,uid,(Uid_t)-1) < 0
2090 || PerlProc_getuid() != euid || PerlProc_geteuid() != uid)
2091 croak("Can't swap uid and euid"); /* really paranoid */
2092 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2093 croak("Permission denied"); /* testing full pathname here */
2094 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2095 tmpstatbuf.st_ino != statbuf.st_ino) {
2096 (void)PerlIO_close(rsfp);
2097 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2099 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2100 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2101 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2102 (long)statbuf.st_dev, (long)statbuf.st_ino,
2103 SvPVX(GvSV(curcop->cop_filegv)),
2104 (long)statbuf.st_uid, (long)statbuf.st_gid);
2105 (void)PerlProc_pclose(rsfp);
2107 croak("Permission denied\n");
2111 setreuid(uid,euid) < 0
2113 # if defined(HAS_SETRESUID)
2114 setresuid(uid,euid,(Uid_t)-1) < 0
2117 || PerlProc_getuid() != uid || PerlProc_geteuid() != euid)
2118 croak("Can't reswap uid and euid");
2119 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2120 croak("Permission denied\n");
2122 #endif /* HAS_SETREUID */
2123 #endif /* IAMSUID */
2125 if (!S_ISREG(statbuf.st_mode))
2126 croak("Permission denied");
2127 if (statbuf.st_mode & S_IWOTH)
2128 croak("Setuid/gid script is writable by world");
2129 doswitches = FALSE; /* -s is insecure in suid */
2131 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2132 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2133 croak("No #! line");
2134 s = SvPV(linestr,na)+2;
2136 while (!isSPACE(*s)) s++;
2137 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2138 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2139 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2140 croak("Not a perl script");
2141 while (*s == ' ' || *s == '\t') s++;
2143 * #! arg must be what we saw above. They can invoke it by
2144 * mentioning suidperl explicitly, but they may not add any strange
2145 * arguments beyond what #! says if they do invoke suidperl that way.
2147 len = strlen(validarg);
2148 if (strEQ(validarg," PHOOEY ") ||
2149 strnNE(s,validarg,len) || !isSPACE(s[len]))
2150 croak("Args must match #! line");
2153 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2154 euid == statbuf.st_uid)
2156 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2157 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2158 #endif /* IAMSUID */
2160 if (euid) { /* oops, we're not the setuid root perl */
2161 (void)PerlIO_close(rsfp);
2164 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2166 croak("Can't do setuid\n");
2169 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2171 (void)setegid(statbuf.st_gid);
2174 (void)setregid((Gid_t)-1,statbuf.st_gid);
2176 #ifdef HAS_SETRESGID
2177 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2179 PerlProc_setgid(statbuf.st_gid);
2183 if (PerlProc_getegid() != statbuf.st_gid)
2184 croak("Can't do setegid!\n");
2186 if (statbuf.st_mode & S_ISUID) {
2187 if (statbuf.st_uid != euid)
2189 (void)seteuid(statbuf.st_uid); /* all that for this */
2192 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2194 #ifdef HAS_SETRESUID
2195 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2197 PerlProc_setuid(statbuf.st_uid);
2201 if (PerlProc_geteuid() != statbuf.st_uid)
2202 croak("Can't do seteuid!\n");
2204 else if (uid) { /* oops, mustn't run as root */
2206 (void)seteuid((Uid_t)uid);
2209 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2211 #ifdef HAS_SETRESUID
2212 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2214 PerlProc_setuid((Uid_t)uid);
2218 if (PerlProc_geteuid() != uid)
2219 croak("Can't do seteuid!\n");
2222 if (!cando(S_IXUSR,TRUE,&statbuf))
2223 croak("Permission denied\n"); /* they can't do this */
2226 else if (preprocess)
2227 croak("-P not allowed for setuid/setgid script\n");
2228 else if (fdscript >= 0)
2229 croak("fd script not allowed in suidperl\n");
2231 croak("Script is not setuid/setgid in suidperl\n");
2233 /* We absolutely must clear out any saved ids here, so we */
2234 /* exec the real perl, substituting fd script for scriptname. */
2235 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2236 PerlIO_rewind(rsfp);
2237 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2238 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2239 if (!origargv[which])
2240 croak("Permission denied");
2241 origargv[which] = savepv(form("/dev/fd/%d/%s",
2242 PerlIO_fileno(rsfp), origargv[which]));
2243 #if defined(HAS_FCNTL) && defined(F_SETFD)
2244 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2246 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2247 croak("Can't do setuid\n");
2248 #endif /* IAMSUID */
2250 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2251 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2253 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2254 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2256 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2259 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2260 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2261 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2262 /* not set-id, must be wrapped */
2268 find_beginning(void)
2270 register char *s, *s2;
2272 /* skip forward in input to the real script? */
2276 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2277 croak("No Perl script found in input\n");
2278 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2279 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2281 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2283 while (*s == ' ' || *s == '\t') s++;
2285 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2286 if (strnEQ(s2-4,"perl",4))
2288 while (s = moreswitches(s)) ;
2290 if (cddir && PerlDir_chdir(cddir) < 0)
2291 croak("Can't chdir to %s",cddir);
2300 uid = (int)PerlProc_getuid();
2301 euid = (int)PerlProc_geteuid();
2302 gid = (int)PerlProc_getgid();
2303 egid = (int)PerlProc_getegid();
2308 tainting |= (uid && (euid != uid || egid != gid));
2312 forbid_setid(char *s)
2315 croak("No %s allowed while running setuid", s);
2317 croak("No %s allowed while running setgid", s);
2324 curstash = debstash;
2325 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2327 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2328 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2329 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2330 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2331 sv_setiv(DBsingle, 0);
2332 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2333 sv_setiv(DBtrace, 0);
2334 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2335 sv_setiv(DBsignal, 0);
2336 curstash = defstash;
2339 #ifndef STRESS_REALLOC
2340 #define REASONABLE(size) (size)
2342 #define REASONABLE(size) (1) /* unreasonable */
2346 init_stacks(ARGSproto)
2348 /* start with 128-item stack and 8K cxstack */
2349 curstackinfo = new_stackinfo(REASONABLE(128),
2350 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
2351 curstackinfo->si_type = SI_MAIN;
2352 curstack = curstackinfo->si_stack;
2353 mainstack = curstack; /* remember in case we switch stacks */
2355 stack_base = AvARRAY(curstack);
2356 stack_sp = stack_base;
2357 stack_max = stack_base + AvMAX(curstack);
2359 New(50,tmps_stack,REASONABLE(128),SV*);
2362 tmps_max = REASONABLE(128);
2364 New(54,markstack,REASONABLE(32),I32);
2365 markstack_ptr = markstack;
2366 markstack_max = markstack + REASONABLE(32);
2370 New(54,scopestack,REASONABLE(32),I32);
2372 scopestack_max = REASONABLE(32);
2374 New(54,savestack,REASONABLE(128),ANY);
2376 savestack_max = REASONABLE(128);
2378 New(54,retstack,REASONABLE(16),OP*);
2380 retstack_max = REASONABLE(16);
2389 while (curstackinfo->si_next)
2390 curstackinfo = curstackinfo->si_next;
2391 while (curstackinfo) {
2392 PERL_SI *p = curstackinfo->si_prev;
2393 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
2394 Safefree(curstackinfo->si_cxstack);
2395 Safefree(curstackinfo);
2398 Safefree(tmps_stack);
2399 Safefree(markstack);
2400 Safefree(scopestack);
2401 Safefree(savestack);
2410 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2423 subname = newSVpv("main",4);
2427 init_predump_symbols(void)
2433 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2434 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2435 GvMULTI_on(stdingv);
2436 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2437 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2439 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2441 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2443 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2445 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2447 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2449 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2450 GvMULTI_on(othergv);
2451 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2452 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2454 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2456 statname = NEWSV(66,0); /* last filename we did stat on */
2459 osname = savepv(OSNAME);
2463 init_postdump_symbols(register int argc, register char **argv, register char **env)
2470 argc--,argv++; /* skip name of script */
2472 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2475 if (argv[0][1] == '-') {
2479 if (s = strchr(argv[0], '=')) {
2481 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2484 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2487 toptarget = NEWSV(0,0);
2488 sv_upgrade(toptarget, SVt_PVFM);
2489 sv_setpvn(toptarget, "", 0);
2490 bodytarget = NEWSV(0,0);
2491 sv_upgrade(bodytarget, SVt_PVFM);
2492 sv_setpvn(bodytarget, "", 0);
2493 formtarget = bodytarget;
2496 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2497 sv_setpv(GvSV(tmpgv),origfilename);
2498 magicname("0", "0", 1);
2500 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2501 sv_setpv(GvSV(tmpgv),origargv[0]);
2502 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2504 (void)gv_AVadd(argvgv);
2505 av_clear(GvAVn(argvgv));
2506 for (; argc > 0; argc--,argv++) {
2507 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2510 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2514 hv_magic(hv, envgv, 'E');
2515 #ifndef VMS /* VMS doesn't have environ array */
2516 /* Note that if the supplied env parameter is actually a copy
2517 of the global environ then it may now point to free'd memory
2518 if the environment has been modified since. To avoid this
2519 problem we treat env==NULL as meaning 'use the default'
2524 environ[0] = Nullch;
2525 for (; *env; env++) {
2526 if (!(s = strchr(*env,'=')))
2532 sv = newSVpv(s--,0);
2533 (void)hv_store(hv, *env, s - *env, sv, 0);
2535 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2536 /* Sins of the RTL. See note in my_setenv(). */
2537 (void)PerlEnv_putenv(savepv(*env));
2541 #ifdef DYNAMIC_ENV_FETCH
2542 HvNAME(hv) = savepv(ENV_HV_NAME);
2546 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2547 sv_setiv(GvSV(tmpgv), (IV)getpid());
2556 s = PerlEnv_getenv("PERL5LIB");
2560 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2562 /* Treat PERL5?LIB as a possible search list logical name -- the
2563 * "natural" VMS idiom for a Unix path string. We allow each
2564 * element to be a set of |-separated directories for compatibility.
2568 if (my_trnlnm("PERL5LIB",buf,0))
2569 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2571 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2575 /* Use the ~-expanded versions of APPLLIB (undocumented),
2576 ARCHLIB PRIVLIB SITEARCH and SITELIB
2579 incpush(APPLLIB_EXP, TRUE);
2583 incpush(ARCHLIB_EXP, FALSE);
2586 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2589 incpush(PRIVLIB_EXP, TRUE);
2591 incpush(PRIVLIB_EXP, FALSE);
2595 incpush(SITEARCH_EXP, FALSE);
2599 incpush(SITELIB_EXP, TRUE);
2601 incpush(SITELIB_EXP, FALSE);
2605 incpush(".", FALSE);
2609 # define PERLLIB_SEP ';'
2612 # define PERLLIB_SEP '|'
2614 # define PERLLIB_SEP ':'
2617 #ifndef PERLLIB_MANGLE
2618 # define PERLLIB_MANGLE(s,n) (s)
2622 incpush(char *p, int addsubdirs)
2624 SV *subdir = Nullsv;
2630 subdir = sv_newmortal();
2631 if (!archpat_auto) {
2632 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2633 + sizeof("//auto"));
2634 New(55, archpat_auto, len, char);
2635 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2637 for (len = sizeof(ARCHNAME) + 2;
2638 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2639 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2644 /* Break at all separators */
2646 SV *libdir = NEWSV(55,0);
2649 /* skip any consecutive separators */
2650 while ( *p == PERLLIB_SEP ) {
2651 /* Uncomment the next line for PATH semantics */
2652 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2656 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2657 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2662 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2663 p = Nullch; /* break out */
2667 * BEFORE pushing libdir onto @INC we may first push version- and
2668 * archname-specific sub-directories.
2671 struct stat tmpstatbuf;
2676 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2678 while (unix[len-1] == '/') len--; /* Cosmetic */
2679 sv_usepvn(libdir,unix,len);
2682 PerlIO_printf(PerlIO_stderr(),
2683 "Failed to unixify @INC element \"%s\"\n",
2686 /* .../archname/version if -d .../archname/version/auto */
2687 sv_setsv(subdir, libdir);
2688 sv_catpv(subdir, archpat_auto);
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"));
2694 /* .../archname if -d .../archname/auto */
2695 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2696 strlen(patchlevel) + 1, "", 0);
2697 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2698 S_ISDIR(tmpstatbuf.st_mode))
2699 av_push(GvAVn(incgv),
2700 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2703 /* finally push this lib directory on the end of @INC */
2704 av_push(GvAVn(incgv), libdir);
2709 STATIC struct perl_thread *
2712 struct perl_thread *thr;
2715 Newz(53, thr, 1, struct perl_thread);
2716 curcop = &compiling;
2717 thr->cvcache = newHV();
2718 thr->threadsv = newAV();
2719 /* thr->threadsvp is set when find_threadsv is called */
2720 thr->specific = newAV();
2721 thr->errhv = newHV();
2722 thr->flags = THRf_R_JOINABLE;
2723 MUTEX_INIT(&thr->mutex);
2724 /* Handcraft thrsv similarly to mess_sv */
2725 New(53, thrsv, 1, SV);
2726 Newz(53, xpv, 1, XPV);
2727 SvFLAGS(thrsv) = SVt_PV;
2728 SvANY(thrsv) = (void*)xpv;
2729 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2730 SvPVX(thrsv) = (char*)thr;
2731 SvCUR_set(thrsv, sizeof(thr));
2732 SvLEN_set(thrsv, sizeof(thr));
2733 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2737 MUTEX_LOCK(&threads_mutex);
2742 MUTEX_UNLOCK(&threads_mutex);
2744 #ifdef HAVE_THREAD_INTERN
2745 init_thread_intern(thr);
2748 #ifdef SET_THREAD_SELF
2749 SET_THREAD_SELF(thr);
2751 thr->self = pthread_self();
2752 #endif /* SET_THREAD_SELF */
2756 * These must come after the SET_THR because sv_setpvn does
2757 * SvTAINT and the taint fields require dTHR.
2759 toptarget = NEWSV(0,0);
2760 sv_upgrade(toptarget, SVt_PVFM);
2761 sv_setpvn(toptarget, "", 0);
2762 bodytarget = NEWSV(0,0);
2763 sv_upgrade(bodytarget, SVt_PVFM);
2764 sv_setpvn(bodytarget, "", 0);
2765 formtarget = bodytarget;
2766 thr->errsv = newSVpv("", 0);
2767 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2770 #endif /* USE_THREADS */
2773 call_list(I32 oldscope, AV *paramList)
2776 line_t oldline = curcop->cop_line;
2781 while (AvFILL(paramList) >= 0) {
2782 CV *cv = (CV*)av_shift(paramList);
2791 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2792 (void)SvPV(atsv, len);
2795 curcop = &compiling;
2796 curcop->cop_line = oldline;
2797 if (paramList == beginav)
2798 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2800 sv_catpv(atsv, "END failed--cleanup aborted");
2801 while (scopestack_ix > oldscope)
2803 croak("%s", SvPVX(atsv));
2811 /* my_exit() was called */
2812 while (scopestack_ix > oldscope)
2815 curstash = defstash;
2817 call_list(oldscope, endav);
2819 curcop = &compiling;
2820 curcop->cop_line = oldline;
2822 if (paramList == beginav)
2823 croak("BEGIN failed--compilation aborted");
2825 croak("END failed--cleanup aborted");
2831 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2836 curcop = &compiling;
2837 curcop->cop_line = oldline;
2850 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2851 thr, (unsigned long) status));
2852 #endif /* USE_THREADS */
2861 STATUS_NATIVE_SET(status);
2868 my_failure_exit(void)
2871 if (vaxc$errno & 1) {
2872 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2873 STATUS_NATIVE_SET(44);
2876 if (!vaxc$errno && errno) /* unlikely */
2877 STATUS_NATIVE_SET(44);
2879 STATUS_NATIVE_SET(vaxc$errno);
2884 STATUS_POSIX_SET(errno);
2886 exitstatus = STATUS_POSIX >> 8;
2887 if (exitstatus & 255)
2888 STATUS_POSIX_SET(exitstatus);
2890 STATUS_POSIX_SET(255);
2900 register PERL_CONTEXT *cx;
2905 SvREFCNT_dec(e_script);
2909 POPSTACK_TO(mainstack);
2910 if (cxstack_ix >= 0) {
2925 read_e_script(CPerlObj *pPerl, int idx, SV *buf_sv, int maxlen)
2927 read_e_script(int idx, SV *buf_sv, int maxlen)
2931 p = SvPVX(e_script);
2932 nl = strchr(p, '\n');
2933 nl = (nl) ? nl+1 : SvEND(e_script);
2936 sv_catpvn(buf_sv, p, nl-p);
2937 sv_chop(e_script, nl);