3 * Copyright (c) 1987-1998 Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
16 #include "patchlevel.h"
18 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
23 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
24 char *getenv _((char *)); /* Usually in <stdlib.h> */
34 dEXTCONST char rcsid[] = "perl.c\nPatch level: ###\n";
42 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
49 static I32 read_e_script _((CPerlObj* pPerl, int idx, SV *buf_sv, int maxlen));
51 static void find_beginning _((void));
52 static void forbid_setid _((char *));
53 static void incpush _((char *, int));
54 static void init_interp _((void));
55 static void init_ids _((void));
56 static void init_debugger _((void));
57 static void init_lexer _((void));
58 static void init_main_stash _((void));
60 static struct perl_thread * init_main_thread _((void));
61 #endif /* USE_THREADS */
62 static void init_perllib _((void));
63 static void init_postdump_symbols _((int, char **, char **));
64 static void init_predump_symbols _((void));
65 static void my_exit_jump _((void)) __attribute__((noreturn));
66 static void nuke_stacks _((void));
67 static void open_script _((char *, bool, SV *, int *fd));
68 static void usage _((char *));
69 static void validate_suid _((char *, char*, int));
70 static I32 read_e_script _((int idx, SV *buf_sv, int maxlen));
74 CPerlObj* perl_alloc(IPerlMem* ipM, IPerlEnv* ipE, IPerlStdIO* ipStd,
75 IPerlLIO* ipLIO, IPerlDir* ipD, IPerlSock* ipS, IPerlProc* ipP)
77 CPerlObj* pPerl = new(ipM) CPerlObj(ipM, ipE, ipStd, ipLIO, ipD, ipS, ipP);
87 PerlInterpreter *sv_interp;
90 New(53, sv_interp, 1, PerlInterpreter);
93 #endif /* PERL_OBJECT */
97 CPerlObj::perl_construct(void)
99 perl_construct(register PerlInterpreter *sv_interp)
105 struct perl_thread *thr;
106 #endif /* FAKE_THREADS */
107 #endif /* USE_THREADS */
110 if (!(curinterp = sv_interp))
116 Zero(sv_interp, 1, PerlInterpreter);
119 /* Init the real globals (and main thread)? */
124 #ifdef ALLOC_THREAD_KEY
127 if (pthread_key_create(&thr_key, 0))
128 croak("panic: pthread_key_create");
130 MUTEX_INIT(&sv_mutex);
132 * Safe to use basic SV functions from now on (though
133 * not things like mortals or tainting yet).
135 MUTEX_INIT(&eval_mutex);
136 COND_INIT(&eval_cond);
137 MUTEX_INIT(&threads_mutex);
138 COND_INIT(&nthreads_cond);
139 #ifdef EMULATE_ATOMIC_REFCOUNTS
140 MUTEX_INIT(&svref_mutex);
141 #endif /* EMULATE_ATOMIC_REFCOUNTS */
143 thr = init_main_thread();
144 #endif /* USE_THREADS */
146 linestr = NEWSV(65,79);
147 sv_upgrade(linestr,SVt_PVIV);
149 if (!SvREADONLY(&sv_undef)) {
150 SvREADONLY_on(&sv_undef);
154 SvREADONLY_on(&sv_no);
156 sv_setpv(&sv_yes,Yes);
158 SvREADONLY_on(&sv_yes);
161 nrs = newSVpv("\n", 1);
162 rs = SvREFCNT_inc(nrs);
166 /* sighandlerp = sighandler; */
168 sighandlerp = sighandler;
174 * There is no way we can refer to them from Perl so close them to save
175 * space. The other alternative would be to provide STDAUX and STDPRN
178 (void)fclose(stdaux);
179 (void)fclose(stdprn);
186 perl_destruct_level = 1;
188 if (perl_destruct_level > 0)
193 lex_state = LEX_NOTPARSING;
195 start_env.je_prev = NULL;
196 start_env.je_ret = -1;
197 start_env.je_mustcatch = TRUE;
198 top_env = &start_env;
201 SET_NUMERIC_STANDARD();
202 #if defined(SUBVERSION) && SUBVERSION > 0
203 sprintf(patchlevel, "%7.5f", (double) 5
204 + ((double) PATCHLEVEL / (double) 1000)
205 + ((double) SUBVERSION / (double) 100000));
207 sprintf(patchlevel, "%5.3f", (double) 5 +
208 ((double) PATCHLEVEL / (double) 1000));
211 #if defined(LOCAL_PATCH_COUNT)
212 localpatches = local_patches; /* For possible -v */
215 PerlIO_init(); /* Hook to IO system */
217 fdpid = newAV(); /* for remembering popen pids by fd */
218 modglobal = newHV(); /* pointers to per-interpreter module globals */
221 New(51,debname,128,char);
222 New(52,debdelim,128,char);
230 CPerlObj::perl_destruct(void)
232 perl_destruct(register PerlInterpreter *sv_interp)
236 int destruct_level; /* 0=none, 1=full, 2=full with checks */
241 #endif /* USE_THREADS */
244 if (!(curinterp = sv_interp))
250 /* Pass 1 on any remaining threads: detach joinables, join zombies */
252 MUTEX_LOCK(&threads_mutex);
253 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
254 "perl_destruct: waiting for %d threads...\n",
256 for (t = thr->next; t != thr; t = t->next) {
257 MUTEX_LOCK(&t->mutex);
258 switch (ThrSTATE(t)) {
261 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
262 "perl_destruct: joining zombie %p\n", t));
263 ThrSETSTATE(t, THRf_DEAD);
264 MUTEX_UNLOCK(&t->mutex);
267 * The SvREFCNT_dec below may take a long time (e.g. av
268 * may contain an object scalar whose destructor gets
269 * called) so we have to unlock threads_mutex and start
272 MUTEX_UNLOCK(&threads_mutex);
274 SvREFCNT_dec((SV*)av);
275 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
276 "perl_destruct: joined zombie %p OK\n", t));
278 case THRf_R_JOINABLE:
279 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
280 "perl_destruct: detaching thread %p\n", t));
281 ThrSETSTATE(t, THRf_R_DETACHED);
283 * We unlock threads_mutex and t->mutex in the opposite order
284 * from which we locked them just so that DETACH won't
285 * deadlock if it panics. It's only a breach of good style
286 * not a bug since they are unlocks not locks.
288 MUTEX_UNLOCK(&threads_mutex);
290 MUTEX_UNLOCK(&t->mutex);
293 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
294 "perl_destruct: ignoring %p (state %u)\n",
296 MUTEX_UNLOCK(&t->mutex);
297 /* fall through and out */
300 /* We leave the above "Pass 1" loop with threads_mutex still locked */
302 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
305 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
306 "perl_destruct: final wait for %d threads\n",
308 COND_WAIT(&nthreads_cond, &threads_mutex);
310 /* At this point, we're the last thread */
311 MUTEX_UNLOCK(&threads_mutex);
312 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
313 MUTEX_DESTROY(&threads_mutex);
314 COND_DESTROY(&nthreads_cond);
315 #endif /* !defined(FAKE_THREADS) */
316 #endif /* USE_THREADS */
318 destruct_level = perl_destruct_level;
322 if (s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL")) {
324 if (destruct_level < i)
337 /* We must account for everything. */
339 /* Destroy the main CV and syntax tree */
341 curpad = AvARRAY(comppad);
347 SvREFCNT_dec(main_cv);
352 * Try to destruct global references. We do this first so that the
353 * destructors and destructees still exist. Some sv's might remain.
354 * Non-referenced objects are on their own.
361 /* unhook hooks which will soon be, or use, destroyed data */
362 SvREFCNT_dec(warnhook);
364 SvREFCNT_dec(diehook);
366 SvREFCNT_dec(parsehook);
369 /* call exit list functions */
370 while (exitlistlen-- > 0)
371 exitlist[exitlistlen].fn(PERL_OBJECT_THIS_ exitlist[exitlistlen].ptr);
375 if (destruct_level == 0){
377 DEBUG_P(debprofdump());
379 /* The exit() function will do everything that needs doing. */
383 /* loosen bonds of global variables */
386 (void)PerlIO_close(rsfp);
390 /* Filters for program text */
391 SvREFCNT_dec(rsfp_filters);
392 rsfp_filters = Nullav;
404 sawampersand = FALSE; /* must save all match strings */
405 sawstudy = FALSE; /* do fbm_instr on all strings */
413 SvREFCNT_dec(e_script);
417 /* magical thingies */
419 Safefree(ofs); /* $, */
422 Safefree(ors); /* $\ */
425 SvREFCNT_dec(nrs); /* $\ helper */
428 multiline = 0; /* $* */
430 SvREFCNT_dec(statname);
434 /* defgv, aka *_ should be taken care of elsewhere */
436 /* clean up after study() */
437 SvREFCNT_dec(lastscream);
439 Safefree(screamfirst);
441 Safefree(screamnext);
444 /* startup and shutdown function lists */
445 SvREFCNT_dec(beginav);
447 SvREFCNT_dec(initav);
452 /* shortcuts just get cleared */
463 /* reset so print() ends up where we expect */
466 /* Prepare to destruct main symbol table. */
473 if (destruct_level >= 2) {
474 if (scopestack_ix != 0)
475 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
476 (long)scopestack_ix);
477 if (savestack_ix != 0)
478 warn("Unbalanced saves: %ld more saves than restores\n",
480 if (tmps_floor != -1)
481 warn("Unbalanced tmps: %ld more allocs than frees\n",
482 (long)tmps_floor + 1);
483 if (cxstack_ix != -1)
484 warn("Unbalanced context: %ld more PUSHes than POPs\n",
485 (long)cxstack_ix + 1);
488 /* Now absolutely destruct everything, somehow or other, loops or no. */
490 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
491 while (sv_count != 0 && sv_count != last_sv_count) {
492 last_sv_count = sv_count;
495 SvFLAGS(strtab) &= ~SVTYPEMASK;
496 SvFLAGS(strtab) |= SVt_PVHV;
498 /* Destruct the global string table. */
500 /* Yell and reset the HeVAL() slots that are still holding refcounts,
501 * so that sv_free() won't fail on them.
510 array = HvARRAY(strtab);
514 warn("Unbalanced string table refcount: (%d) for \"%s\"",
515 HeVAL(hent) - Nullsv, HeKEY(hent));
516 HeVAL(hent) = Nullsv;
526 SvREFCNT_dec(strtab);
529 warn("Scalars leaked: %ld\n", (long)sv_count);
533 /* No SVs have survived, need to clean out */
536 Safefree(origfilename);
537 Safefree(archpat_auto);
538 Safefree(reg_start_tmp);
539 Safefree(HeKEY_hek(&hv_fetch_ent_mh));
542 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
544 DEBUG_P(debprofdump());
546 MUTEX_DESTROY(&sv_mutex);
547 MUTEX_DESTROY(&eval_mutex);
548 COND_DESTROY(&eval_cond);
550 /* As the penultimate thing, free the non-arena SV for thrsv */
551 Safefree(SvPVX(thrsv));
552 Safefree(SvANY(thrsv));
555 #endif /* USE_THREADS */
557 /* As the absolutely last thing, free the non-arena SV for mess() */
560 /* we know that type >= SVt_PV */
562 Safefree(SvPVX(mess_sv));
563 Safefree(SvANY(mess_sv));
571 CPerlObj::perl_free(void)
573 perl_free(PerlInterpreter *sv_interp)
579 if (!(curinterp = sv_interp))
587 CPerlObj::perl_atexit(void (*fn) (CPerlObj*,void *), void *ptr)
589 perl_atexit(void (*fn) (void *), void *ptr)
592 Renew(exitlist, exitlistlen+1, PerlExitListEntry);
593 exitlist[exitlistlen].fn = fn;
594 exitlist[exitlistlen].ptr = ptr;
600 CPerlObj::perl_parse(void (*xsinit) (CPerlObj*), int argc, char **argv, char **env)
602 perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char **argv, char **env)
608 char *scriptname = NULL;
609 VOL bool dosearch = FALSE;
617 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
620 croak("suidperl is no longer needed since the kernel can now execute\n\
621 setuid perl scripts securely.\n");
626 if (!(curinterp = sv_interp))
630 #if defined(NeXT) && defined(__DYNAMIC__)
631 _dyld_lookup_and_bind
632 ("__environ", (unsigned long *) &environ_pointer, NULL);
637 #ifndef VMS /* VMS doesn't have environ array */
638 origenviron = environ;
643 /* Come here if running an undumped a.out. */
645 origfilename = savepv(argv[0]);
647 cxstack_ix = -1; /* start label stack again */
649 init_postdump_symbols(argc,argv,env);
654 curpad = AvARRAY(comppad);
659 SvREFCNT_dec(main_cv);
663 oldscope = scopestack_ix;
671 /* my_exit() was called */
672 while (scopestack_ix > oldscope)
677 call_list(oldscope, endav);
679 return STATUS_NATIVE_EXPORT;
682 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
686 sv_setpvn(linestr,"",0);
687 sv = newSVpv("",0); /* first used for -I flags */
691 for (argc--,argv++; argc > 0; argc--,argv++) {
692 if (argv[0][0] != '-' || !argv[0][1])
696 validarg = " PHOOEY ";
722 if (s = moreswitches(s))
732 if (euid != uid || egid != gid)
733 croak("No -e allowed in setuid scripts");
735 e_script = newSVpv("",0);
736 filter_add(read_e_script, NULL);
739 sv_catpv(e_script, s);
741 sv_catpv(e_script, argv[1]);
745 croak("No code specified for -e");
746 sv_catpv(e_script, "\n");
749 case 'I': /* -I handled both here and in moreswitches() */
751 if (!*++s && (s=argv[1]) != Nullch) {
754 while (s && isSPACE(*s))
758 for (e = s; *e && !isSPACE(*e); e++) ;
765 } /* XXX else croak? */
779 preambleav = newAV();
780 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
782 Sv = newSVpv("print myconfig();",0);
784 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
786 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
788 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
789 sv_catpv(Sv,"\" Compile-time options:");
791 sv_catpv(Sv," DEBUGGING");
794 sv_catpv(Sv," NO_EMBED");
797 sv_catpv(Sv," MULTIPLICITY");
799 sv_catpv(Sv,"\\n\",");
801 #if defined(LOCAL_PATCH_COUNT)
802 if (LOCAL_PATCH_COUNT > 0) {
804 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
805 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
807 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
811 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
814 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
816 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
821 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
822 print \" \\%ENV:\\n @env\\n\" if @env; \
823 print \" \\@INC:\\n @INC\\n\";");
826 Sv = newSVpv("config_vars(qw(",0);
831 av_push(preambleav, Sv);
832 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
843 if (!*++s || isSPACE(*s)) {
847 /* catch use of gnu style long options */
848 if (strEQ(s, "version")) {
852 if (strEQ(s, "help")) {
859 croak("Unrecognized switch: -%s (-h will show valid options)",s);
864 if (!tainting && (s = PerlEnv_getenv("PERL5OPT"))) {
875 if (!strchr("DIMUdmw", *s))
876 croak("Illegal switch in PERL5OPT: -%c", *s);
882 scriptname = argv[0];
885 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
887 else if (scriptname == Nullch) {
889 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
897 open_script(scriptname,dosearch,sv,&fdscript);
899 validate_suid(validarg, scriptname,fdscript);
904 main_cv = compcv = (CV*)NEWSV(1104,0);
905 sv_upgrade((SV *)compcv, SVt_PVCV);
909 av_push(comppad, Nullsv);
910 curpad = AvARRAY(comppad);
911 comppad_name = newAV();
912 comppad_name_fill = 0;
913 min_intro_pending = 0;
916 av_store(comppad_name, 0, newSVpv("@_", 2));
917 curpad[0] = (SV*)newAV();
918 SvPADMY_on(curpad[0]); /* XXX Needed? */
920 New(666, CvMUTEXP(compcv), 1, perl_mutex);
921 MUTEX_INIT(CvMUTEXP(compcv));
922 #endif /* USE_THREADS */
924 comppadlist = newAV();
925 AvREAL_off(comppadlist);
926 av_store(comppadlist, 0, (SV*)comppad_name);
927 av_store(comppadlist, 1, (SV*)comppad);
928 CvPADLIST(compcv) = comppadlist;
930 boot_core_UNIVERSAL();
933 (*xsinit)(PERL_OBJECT_THIS); /* in case linked C routines want magical variables */
934 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
938 init_predump_symbols();
939 /* init_postdump_symbols not currently designed to be called */
940 /* more than once (ENV isn't cleared first, for example) */
941 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
943 init_postdump_symbols(argc,argv,env);
947 /* now parse the script */
949 SETERRNO(0,SS$_NORMAL);
951 if (yyparse() || error_count) {
953 croak("%s had compilation errors.\n", origfilename);
955 croak("Execution of %s aborted due to compilation errors.\n",
959 curcop->cop_line = 0;
963 SvREFCNT_dec(e_script);
967 /* now that script is parsed, we can modify record separator */
969 rs = SvREFCNT_inc(nrs);
970 sv_setsv(perl_get_sv("/", TRUE), rs);
981 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
982 dump_mstats("after compilation:");
993 CPerlObj::perl_run(void)
995 perl_run(PerlInterpreter *sv_interp)
1004 if (!(curinterp = sv_interp))
1008 oldscope = scopestack_ix;
1013 cxstack_ix = -1; /* start context stack again */
1016 /* my_exit() was called */
1017 while (scopestack_ix > oldscope)
1020 curstash = defstash;
1022 call_list(oldscope, endav);
1024 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1025 dump_mstats("after execution: ");
1028 return STATUS_NATIVE_EXPORT;
1031 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1036 POPSTACK_TO(mainstack);
1040 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1041 sawampersand ? "Enabling" : "Omitting"));
1044 DEBUG_x(dump_all());
1045 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1047 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1048 (unsigned long) thr));
1049 #endif /* USE_THREADS */
1052 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1055 if (PERLDB_SINGLE && DBsingle)
1056 sv_setiv(DBsingle, 1);
1058 call_list(oldscope, initav);
1068 else if (main_start) {
1069 CvDEPTH(main_cv) = 1;
1080 perl_get_sv(char *name, I32 create)
1084 if (name[1] == '\0' && !isALPHA(name[0])) {
1085 PADOFFSET tmp = find_threadsv(name);
1086 if (tmp != NOT_IN_PAD) {
1088 return THREADSV(tmp);
1091 #endif /* USE_THREADS */
1092 gv = gv_fetchpv(name, create, SVt_PV);
1099 perl_get_av(char *name, I32 create)
1101 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1110 perl_get_hv(char *name, I32 create)
1112 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1121 perl_get_cv(char *name, I32 create)
1123 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1124 if (create && !GvCVu(gv))
1125 return newSUB(start_subparse(FALSE, 0),
1126 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1134 /* Be sure to refetch the stack pointer after calling these routines. */
1137 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1139 /* See G_* flags in cop.h */
1140 /* null terminated arg list */
1147 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1152 return perl_call_pv(sub_name, flags);
1156 perl_call_pv(char *sub_name, I32 flags)
1157 /* name of the subroutine */
1158 /* See G_* flags in cop.h */
1160 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1164 perl_call_method(char *methname, I32 flags)
1165 /* name of the subroutine */
1166 /* See G_* flags in cop.h */
1172 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1177 return perl_call_sv(*stack_sp--, flags);
1180 /* May be called with any of a CV, a GV, or an SV containing the name. */
1182 perl_call_sv(SV *sv, I32 flags)
1184 /* See G_* flags in cop.h */
1187 LOGOP myop; /* fake syntax tree node */
1191 bool oldcatch = CATCH_GET;
1196 if (flags & G_DISCARD) {
1201 Zero(&myop, 1, LOGOP);
1202 myop.op_next = Nullop;
1203 if (!(flags & G_NOARGS))
1204 myop.op_flags |= OPf_STACKED;
1205 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1206 (flags & G_ARRAY) ? OPf_WANT_LIST :
1211 EXTEND(stack_sp, 1);
1214 oldscope = scopestack_ix;
1216 if (PERLDB_SUB && curstash != debstash
1217 /* Handle first BEGIN of -d. */
1218 && (DBcv || (DBcv = GvCV(DBsub)))
1219 /* Try harder, since this may have been a sighandler, thus
1220 * curstash may be meaningless. */
1221 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash)
1222 && !(flags & G_NODEBUG))
1223 op->op_private |= OPpENTERSUB_DB;
1225 if (flags & G_EVAL) {
1226 cLOGOP->op_other = op;
1228 /* we're trying to emulate pp_entertry() here */
1230 register PERL_CONTEXT *cx;
1231 I32 gimme = GIMME_V;
1236 push_return(op->op_next);
1237 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1239 eval_root = op; /* Only needed so that goto works right. */
1242 if (flags & G_KEEPERR)
1257 /* my_exit() was called */
1258 curstash = defstash;
1262 croak("Callback called exit");
1271 stack_sp = stack_base + oldmark;
1272 if (flags & G_ARRAY)
1276 *++stack_sp = &sv_undef;
1284 if (op == (OP*)&myop)
1285 op = pp_entersub(ARGS);
1288 retval = stack_sp - (stack_base + oldmark);
1289 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1293 if (flags & G_EVAL) {
1294 if (scopestack_ix > oldscope) {
1298 register PERL_CONTEXT *cx;
1310 CATCH_SET(oldcatch);
1312 if (flags & G_DISCARD) {
1313 stack_sp = stack_base + oldmark;
1322 /* Eval a string. The G_EVAL flag is always assumed. */
1325 perl_eval_sv(SV *sv, I32 flags)
1327 /* See G_* flags in cop.h */
1330 UNOP myop; /* fake syntax tree node */
1331 I32 oldmark = SP - stack_base;
1338 if (flags & G_DISCARD) {
1346 EXTEND(stack_sp, 1);
1348 oldscope = scopestack_ix;
1350 if (!(flags & G_NOARGS))
1351 myop.op_flags = OPf_STACKED;
1352 myop.op_next = Nullop;
1353 myop.op_type = OP_ENTEREVAL;
1354 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1355 (flags & G_ARRAY) ? OPf_WANT_LIST :
1357 if (flags & G_KEEPERR)
1358 myop.op_flags |= OPf_SPECIAL;
1368 /* my_exit() was called */
1369 curstash = defstash;
1373 croak("Callback called exit");
1382 stack_sp = stack_base + oldmark;
1383 if (flags & G_ARRAY)
1387 *++stack_sp = &sv_undef;
1392 if (op == (OP*)&myop)
1393 op = pp_entereval(ARGS);
1396 retval = stack_sp - (stack_base + oldmark);
1397 if (!(flags & G_KEEPERR))
1402 if (flags & G_DISCARD) {
1403 stack_sp = stack_base + oldmark;
1413 perl_eval_pv(char *p, I32 croak_on_error)
1416 SV* sv = newSVpv(p, 0);
1419 perl_eval_sv(sv, G_SCALAR);
1426 if (croak_on_error && SvTRUE(ERRSV))
1427 croak(SvPVx(ERRSV, na));
1432 /* Require a module. */
1435 perl_require_pv(char *pv)
1437 SV* sv = sv_newmortal();
1438 sv_setpv(sv, "require '");
1441 perl_eval_sv(sv, G_DISCARD);
1445 magicname(char *sym, char *name, I32 namlen)
1449 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1450 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1454 usage(char *name) /* XXX move this out into a module ? */
1457 /* This message really ought to be max 23 lines.
1458 * Removed -h because the user already knows that opton. Others? */
1460 static char *usage_msg[] = {
1461 "-0[octal] specify record separator (\\0, if no argument)",
1462 "-a autosplit mode with -n or -p (splits $_ into @F)",
1463 "-c check syntax only (runs BEGIN and END blocks)",
1464 "-d[:debugger] run scripts under debugger",
1465 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1466 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1467 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1468 "-i[extension] edit <> files in place (make backup if extension supplied)",
1469 "-Idirectory specify @INC/#include directory (may be used more than once)",
1470 "-l[octal] enable line ending processing, specifies line terminator",
1471 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1472 "-n assume 'while (<>) { ... }' loop around your script",
1473 "-p assume loop like -n but print line also like sed",
1474 "-P run script through C preprocessor before compilation",
1475 "-s enable some switch parsing for switches after script name",
1476 "-S look for the script using PATH environment variable",
1477 "-T turn on tainting checks",
1478 "-u dump core after parsing script",
1479 "-U allow unsafe operations",
1480 "-v print version number, patchlevel plus VERY IMPORTANT perl info",
1481 "-V[:variable] print perl configuration information",
1482 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1483 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1487 char **p = usage_msg;
1489 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1491 printf("\n %s", *p++);
1494 /* This routine handles any switches that can be given during run */
1497 moreswitches(char *s)
1506 rschar = scan_oct(s, 4, &numlen);
1508 if (rschar & ~((U8)~0))
1510 else if (!rschar && numlen >= 2)
1511 nrs = newSVpv("", 0);
1514 nrs = newSVpv(&ch, 1);
1520 splitstr = savepv(s + 1);
1534 if (*s == ':' || *s == '=') {
1535 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1539 perldb = PERLDB_ALL;
1546 if (isALPHA(s[1])) {
1547 static char debopts[] = "psltocPmfrxuLHXD";
1550 for (s++; *s && (d = strchr(debopts,*s)); s++)
1551 debug |= 1 << (d - debopts);
1555 for (s++; isDIGIT(*s); s++) ;
1557 debug |= 0x80000000;
1559 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1560 for (s++; isALNUM(*s); s++) ;
1570 inplace = savepv(s+1);
1572 for (s = inplace; *s && !isSPACE(*s); s++) ;
1575 if (*s == '-') /* Additional switches on #! line. */
1579 case 'I': /* -I handled both here and in parse_perl() */
1582 while (*s && isSPACE(*s))
1586 for (e = s; *e && !isSPACE(*e); e++) ;
1587 p = savepvn(s, e-s);
1593 croak("No space allowed after -I");
1603 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1613 ors = SvPV(nrs, orslen);
1614 ors = savepvn(ors, orslen);
1618 forbid_setid("-M"); /* XXX ? */
1621 forbid_setid("-m"); /* XXX ? */
1626 /* -M-foo == 'no foo' */
1627 if (*s == '-') { use = "no "; ++s; }
1628 sv = newSVpv(use,0);
1630 /* We allow -M'Module qw(Foo Bar)' */
1631 while(isALNUM(*s) || *s==':') ++s;
1633 sv_catpv(sv, start);
1634 if (*(start-1) == 'm') {
1636 croak("Can't use '%c' after -mname", *s);
1637 sv_catpv( sv, " ()");
1640 sv_catpvn(sv, start, s-start);
1641 sv_catpv(sv, " split(/,/,q{");
1646 if (preambleav == NULL)
1647 preambleav = newAV();
1648 av_push(preambleav, sv);
1651 croak("No space allowed after -%c", *(s-1));
1668 croak("Too late for \"-T\" option");
1680 #if defined(SUBVERSION) && SUBVERSION > 0
1681 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1682 PATCHLEVEL, SUBVERSION, ARCHNAME);
1684 printf("\nThis is perl, version %s built for %s",
1685 patchlevel, ARCHNAME);
1687 #if defined(LOCAL_PATCH_COUNT)
1688 if (LOCAL_PATCH_COUNT > 0)
1689 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1690 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1693 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1695 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1698 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1699 printf("djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1998\n");
1702 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1703 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1706 printf("atariST series port, ++jrb bammi@cadence.com\n");
1709 Perl may be copied only under the terms of either the Artistic License or the\n\
1710 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\
1711 Complete documentation for Perl, including FAQ lists, should be found on\n\
1712 this system using `man perl' or `perldoc perl'. If you have access to the\n\
1713 Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n");
1721 if (s[1] == '-') /* Additional switches on #! line. */
1732 #ifdef ALTERNATE_SHEBANG
1733 case 'S': /* OS/2 needs -S on "extproc" line. */
1741 croak("Can't emulate -%.1s on #! line",s);
1746 /* compliments of Tom Christiansen */
1748 /* unexec() can be found in the Gnu emacs distribution */
1749 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
1760 prog = newSVpv(BIN_EXP, 0);
1761 sv_catpv(prog, "/perl");
1762 file = newSVpv(origfilename, 0);
1763 sv_catpv(file, ".perldump");
1765 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1766 /* unexec prints msg to stderr in case of failure */
1767 PerlProc_exit(status);
1770 # include <lib$routines.h>
1771 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1773 ABORT(); /* for use with undump */
1778 /* initialize curinterp */
1788 curcop = &compiling; \
1793 laststype = OP_STAT; \
1795 maxsysfd = MAXSYSFD; \
1796 statname = Nullsv; \
1802 laststype = OP_STAT; \
1809 in_clean_objs = FALSE; \
1810 in_clean_all= FALSE; \
1811 profiledata = NULL; \
1813 rsfp_filters= Nullav; \
1817 #define PERLVAR(var,type)
1818 #define PERLVARI(var,type,init) curinterp->var = init;
1819 #define PERLVARIC(var,type,init) curinterp->var = init;
1820 #include "intrpvar.h"
1822 # include "thrdvar.h"
1831 init_main_stash(void)
1836 /* Note that strtab is a rather special HV. Assumptions are made
1837 about not iterating on it, and not adding tie magic to it.
1838 It is properly deallocated in perl_destruct() */
1840 HvSHAREKEYS_off(strtab); /* mandatory */
1841 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1842 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1844 curstash = defstash = newHV();
1845 curstname = newSVpv("main",4);
1846 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1847 SvREFCNT_dec(GvHV(gv));
1848 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1850 HvNAME(defstash) = savepv("main");
1851 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1853 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1854 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1856 replgv = gv_HVadd(gv_fetchpv("\022", TRUE, SVt_PV)); /* ^R */
1858 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1859 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1860 sv_setpvn(ERRSV, "", 0);
1861 curstash = defstash;
1862 compiling.cop_stash = defstash;
1863 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1864 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1865 /* We must init $/ before switches are processed. */
1866 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1870 open_script(char *scriptname, bool dosearch, SV *sv, int *fdscript)
1875 scriptname = find_script(scriptname, dosearch, NULL, 0);
1877 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1878 char *s = scriptname + 8;
1879 *fdscript = atoi(s);
1887 origfilename = savepv(e_script ? "-e" : scriptname);
1888 curcop->cop_filegv = gv_fetchfile(origfilename);
1889 if (strEQ(origfilename,"-"))
1891 if (*fdscript >= 0) {
1892 rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE);
1893 #if defined(HAS_FCNTL) && defined(F_SETFD)
1895 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1898 else if (preprocess) {
1899 char *cpp_cfg = CPPSTDIN;
1900 SV *cpp = NEWSV(0,0);
1901 SV *cmd = NEWSV(0,0);
1903 if (strEQ(cpp_cfg, "cppstdin"))
1904 sv_catpvf(cpp, "%s/", BIN_EXP);
1905 sv_catpv(cpp, cpp_cfg);
1908 sv_catpv(sv,PRIVLIB_EXP);
1912 sed %s -e \"/^[^#]/b\" \
1913 -e \"/^#[ ]*include[ ]/b\" \
1914 -e \"/^#[ ]*define[ ]/b\" \
1915 -e \"/^#[ ]*if[ ]/b\" \
1916 -e \"/^#[ ]*ifdef[ ]/b\" \
1917 -e \"/^#[ ]*ifndef[ ]/b\" \
1918 -e \"/^#[ ]*else/b\" \
1919 -e \"/^#[ ]*elif[ ]/b\" \
1920 -e \"/^#[ ]*undef[ ]/b\" \
1921 -e \"/^#[ ]*endif/b\" \
1924 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1927 %s %s -e '/^[^#]/b' \
1928 -e '/^#[ ]*include[ ]/b' \
1929 -e '/^#[ ]*define[ ]/b' \
1930 -e '/^#[ ]*if[ ]/b' \
1931 -e '/^#[ ]*ifdef[ ]/b' \
1932 -e '/^#[ ]*ifndef[ ]/b' \
1933 -e '/^#[ ]*else/b' \
1934 -e '/^#[ ]*elif[ ]/b' \
1935 -e '/^#[ ]*undef[ ]/b' \
1936 -e '/^#[ ]*endif/b' \
1944 (doextract ? "-e '1,/^#/d\n'" : ""),
1946 scriptname, cpp, sv, CPPMINUS);
1948 #ifdef IAMSUID /* actually, this is caught earlier */
1949 if (euid != uid && !euid) { /* if running suidperl */
1951 (void)seteuid(uid); /* musn't stay setuid root */
1954 (void)setreuid((Uid_t)-1, uid);
1956 #ifdef HAS_SETRESUID
1957 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
1959 PerlProc_setuid(uid);
1963 if (PerlProc_geteuid() != uid)
1964 croak("Can't do seteuid!\n");
1966 #endif /* IAMSUID */
1967 rsfp = PerlProc_popen(SvPVX(cmd), "r");
1971 else if (!*scriptname) {
1972 forbid_setid("program input from stdin");
1973 rsfp = PerlIO_stdin();
1976 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
1977 #if defined(HAS_FCNTL) && defined(F_SETFD)
1979 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1984 #ifndef IAMSUID /* in case script is not readable before setuid */
1985 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
1986 statbuf.st_mode & (S_ISUID|S_ISGID)) {
1988 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
1989 croak("Can't do setuid\n");
1993 croak("Can't open perl script \"%s\": %s\n",
1994 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
1999 validate_suid(char *validarg, char *scriptname, int fdscript)
2003 /* do we need to emulate setuid on scripts? */
2005 /* This code is for those BSD systems that have setuid #! scripts disabled
2006 * in the kernel because of a security problem. Merely defining DOSUID
2007 * in perl will not fix that problem, but if you have disabled setuid
2008 * scripts in the kernel, this will attempt to emulate setuid and setgid
2009 * on scripts that have those now-otherwise-useless bits set. The setuid
2010 * root version must be called suidperl or sperlN.NNN. If regular perl
2011 * discovers that it has opened a setuid script, it calls suidperl with
2012 * the same argv that it had. If suidperl finds that the script it has
2013 * just opened is NOT setuid root, it sets the effective uid back to the
2014 * uid. We don't just make perl setuid root because that loses the
2015 * effective uid we had before invoking perl, if it was different from the
2018 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2019 * be defined in suidperl only. suidperl must be setuid root. The
2020 * Configure script will set this up for you if you want it.
2027 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2028 croak("Can't stat script \"%s\"",origfilename);
2029 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2033 #ifndef HAS_SETREUID
2034 /* On this access check to make sure the directories are readable,
2035 * there is actually a small window that the user could use to make
2036 * filename point to an accessible directory. So there is a faint
2037 * chance that someone could execute a setuid script down in a
2038 * non-accessible directory. I don't know what to do about that.
2039 * But I don't think it's too important. The manual lies when
2040 * it says access() is useful in setuid programs.
2042 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2043 croak("Permission denied");
2045 /* If we can swap euid and uid, then we can determine access rights
2046 * with a simple stat of the file, and then compare device and
2047 * inode to make sure we did stat() on the same file we opened.
2048 * Then we just have to make sure he or she can execute it.
2051 struct stat tmpstatbuf;
2055 setreuid(euid,uid) < 0
2058 setresuid(euid,uid,(Uid_t)-1) < 0
2061 || PerlProc_getuid() != euid || PerlProc_geteuid() != uid)
2062 croak("Can't swap uid and euid"); /* really paranoid */
2063 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2064 croak("Permission denied"); /* testing full pathname here */
2065 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2066 tmpstatbuf.st_ino != statbuf.st_ino) {
2067 (void)PerlIO_close(rsfp);
2068 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2070 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2071 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2072 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2073 (long)statbuf.st_dev, (long)statbuf.st_ino,
2074 SvPVX(GvSV(curcop->cop_filegv)),
2075 (long)statbuf.st_uid, (long)statbuf.st_gid);
2076 (void)PerlProc_pclose(rsfp);
2078 croak("Permission denied\n");
2082 setreuid(uid,euid) < 0
2084 # if defined(HAS_SETRESUID)
2085 setresuid(uid,euid,(Uid_t)-1) < 0
2088 || PerlProc_getuid() != uid || PerlProc_geteuid() != euid)
2089 croak("Can't reswap uid and euid");
2090 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2091 croak("Permission denied\n");
2093 #endif /* HAS_SETREUID */
2094 #endif /* IAMSUID */
2096 if (!S_ISREG(statbuf.st_mode))
2097 croak("Permission denied");
2098 if (statbuf.st_mode & S_IWOTH)
2099 croak("Setuid/gid script is writable by world");
2100 doswitches = FALSE; /* -s is insecure in suid */
2102 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2103 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2104 croak("No #! line");
2105 s = SvPV(linestr,na)+2;
2107 while (!isSPACE(*s)) s++;
2108 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2109 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2110 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2111 croak("Not a perl script");
2112 while (*s == ' ' || *s == '\t') s++;
2114 * #! arg must be what we saw above. They can invoke it by
2115 * mentioning suidperl explicitly, but they may not add any strange
2116 * arguments beyond what #! says if they do invoke suidperl that way.
2118 len = strlen(validarg);
2119 if (strEQ(validarg," PHOOEY ") ||
2120 strnNE(s,validarg,len) || !isSPACE(s[len]))
2121 croak("Args must match #! line");
2124 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2125 euid == statbuf.st_uid)
2127 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2128 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2129 #endif /* IAMSUID */
2131 if (euid) { /* oops, we're not the setuid root perl */
2132 (void)PerlIO_close(rsfp);
2135 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2137 croak("Can't do setuid\n");
2140 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2142 (void)setegid(statbuf.st_gid);
2145 (void)setregid((Gid_t)-1,statbuf.st_gid);
2147 #ifdef HAS_SETRESGID
2148 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2150 PerlProc_setgid(statbuf.st_gid);
2154 if (PerlProc_getegid() != statbuf.st_gid)
2155 croak("Can't do setegid!\n");
2157 if (statbuf.st_mode & S_ISUID) {
2158 if (statbuf.st_uid != euid)
2160 (void)seteuid(statbuf.st_uid); /* all that for this */
2163 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2165 #ifdef HAS_SETRESUID
2166 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2168 PerlProc_setuid(statbuf.st_uid);
2172 if (PerlProc_geteuid() != statbuf.st_uid)
2173 croak("Can't do seteuid!\n");
2175 else if (uid) { /* oops, mustn't run as root */
2177 (void)seteuid((Uid_t)uid);
2180 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2182 #ifdef HAS_SETRESUID
2183 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2185 PerlProc_setuid((Uid_t)uid);
2189 if (PerlProc_geteuid() != uid)
2190 croak("Can't do seteuid!\n");
2193 if (!cando(S_IXUSR,TRUE,&statbuf))
2194 croak("Permission denied\n"); /* they can't do this */
2197 else if (preprocess)
2198 croak("-P not allowed for setuid/setgid script\n");
2199 else if (fdscript >= 0)
2200 croak("fd script not allowed in suidperl\n");
2202 croak("Script is not setuid/setgid in suidperl\n");
2204 /* We absolutely must clear out any saved ids here, so we */
2205 /* exec the real perl, substituting fd script for scriptname. */
2206 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2207 PerlIO_rewind(rsfp);
2208 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2209 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2210 if (!origargv[which])
2211 croak("Permission denied");
2212 origargv[which] = savepv(form("/dev/fd/%d/%s",
2213 PerlIO_fileno(rsfp), origargv[which]));
2214 #if defined(HAS_FCNTL) && defined(F_SETFD)
2215 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2217 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2218 croak("Can't do setuid\n");
2219 #endif /* IAMSUID */
2221 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2222 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2224 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2225 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2227 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2230 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2231 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2232 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2233 /* not set-id, must be wrapped */
2239 find_beginning(void)
2241 register char *s, *s2;
2243 /* skip forward in input to the real script? */
2247 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2248 croak("No Perl script found in input\n");
2249 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2250 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2252 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2254 while (*s == ' ' || *s == '\t') s++;
2256 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2257 if (strnEQ(s2-4,"perl",4))
2259 while (s = moreswitches(s)) ;
2261 if (cddir && PerlDir_chdir(cddir) < 0)
2262 croak("Can't chdir to %s",cddir);
2271 uid = (int)PerlProc_getuid();
2272 euid = (int)PerlProc_geteuid();
2273 gid = (int)PerlProc_getgid();
2274 egid = (int)PerlProc_getegid();
2279 tainting |= (uid && (euid != uid || egid != gid));
2283 forbid_setid(char *s)
2286 croak("No %s allowed while running setuid", s);
2288 croak("No %s allowed while running setgid", s);
2295 curstash = debstash;
2296 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2298 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2299 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2300 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2301 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2302 sv_setiv(DBsingle, 0);
2303 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2304 sv_setiv(DBtrace, 0);
2305 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2306 sv_setiv(DBsignal, 0);
2307 curstash = defstash;
2310 #ifndef STRESS_REALLOC
2311 #define REASONABLE(size) (size)
2313 #define REASONABLE(size) (1) /* unreasonable */
2317 init_stacks(ARGSproto)
2319 /* start with 128-item stack and 8K cxstack */
2320 curstackinfo = new_stackinfo(REASONABLE(128),
2321 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
2322 curstackinfo->si_type = SI_MAIN;
2323 curstack = curstackinfo->si_stack;
2324 mainstack = curstack; /* remember in case we switch stacks */
2326 stack_base = AvARRAY(curstack);
2327 stack_sp = stack_base;
2328 stack_max = stack_base + AvMAX(curstack);
2330 New(50,tmps_stack,REASONABLE(128),SV*);
2333 tmps_max = REASONABLE(128);
2335 New(54,markstack,REASONABLE(32),I32);
2336 markstack_ptr = markstack;
2337 markstack_max = markstack + REASONABLE(32);
2341 New(54,scopestack,REASONABLE(32),I32);
2343 scopestack_max = REASONABLE(32);
2345 New(54,savestack,REASONABLE(128),ANY);
2347 savestack_max = REASONABLE(128);
2349 New(54,retstack,REASONABLE(16),OP*);
2351 retstack_max = REASONABLE(16);
2360 while (curstackinfo->si_next)
2361 curstackinfo = curstackinfo->si_next;
2362 while (curstackinfo) {
2363 PERL_SI *p = curstackinfo->si_prev;
2364 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
2365 Safefree(curstackinfo->si_cxstack);
2366 Safefree(curstackinfo);
2369 Safefree(tmps_stack);
2370 Safefree(markstack);
2371 Safefree(scopestack);
2372 Safefree(savestack);
2381 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2394 subname = newSVpv("main",4);
2398 init_predump_symbols(void)
2404 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2405 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2406 GvMULTI_on(stdingv);
2407 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2408 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2410 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2412 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2414 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2416 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2418 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2420 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2421 GvMULTI_on(othergv);
2422 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2423 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2425 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2427 statname = NEWSV(66,0); /* last filename we did stat on */
2430 osname = savepv(OSNAME);
2434 init_postdump_symbols(register int argc, register char **argv, register char **env)
2441 argc--,argv++; /* skip name of script */
2443 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2446 if (argv[0][1] == '-') {
2450 if (s = strchr(argv[0], '=')) {
2452 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2455 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2458 toptarget = NEWSV(0,0);
2459 sv_upgrade(toptarget, SVt_PVFM);
2460 sv_setpvn(toptarget, "", 0);
2461 bodytarget = NEWSV(0,0);
2462 sv_upgrade(bodytarget, SVt_PVFM);
2463 sv_setpvn(bodytarget, "", 0);
2464 formtarget = bodytarget;
2467 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2468 sv_setpv(GvSV(tmpgv),origfilename);
2469 magicname("0", "0", 1);
2471 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2472 sv_setpv(GvSV(tmpgv),origargv[0]);
2473 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2475 (void)gv_AVadd(argvgv);
2476 av_clear(GvAVn(argvgv));
2477 for (; argc > 0; argc--,argv++) {
2478 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2481 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2485 hv_magic(hv, envgv, 'E');
2486 #ifndef VMS /* VMS doesn't have environ array */
2487 /* Note that if the supplied env parameter is actually a copy
2488 of the global environ then it may now point to free'd memory
2489 if the environment has been modified since. To avoid this
2490 problem we treat env==NULL as meaning 'use the default'
2495 environ[0] = Nullch;
2496 for (; *env; env++) {
2497 if (!(s = strchr(*env,'=')))
2503 sv = newSVpv(s--,0);
2504 (void)hv_store(hv, *env, s - *env, sv, 0);
2506 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2507 /* Sins of the RTL. See note in my_setenv(). */
2508 (void)PerlEnv_putenv(savepv(*env));
2512 #ifdef DYNAMIC_ENV_FETCH
2513 HvNAME(hv) = savepv(ENV_HV_NAME);
2517 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2518 sv_setiv(GvSV(tmpgv), (IV)getpid());
2527 s = PerlEnv_getenv("PERL5LIB");
2531 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2533 /* Treat PERL5?LIB as a possible search list logical name -- the
2534 * "natural" VMS idiom for a Unix path string. We allow each
2535 * element to be a set of |-separated directories for compatibility.
2539 if (my_trnlnm("PERL5LIB",buf,0))
2540 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2542 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2546 /* Use the ~-expanded versions of APPLLIB (undocumented),
2547 ARCHLIB PRIVLIB SITEARCH and SITELIB
2550 incpush(APPLLIB_EXP, TRUE);
2554 incpush(ARCHLIB_EXP, FALSE);
2557 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2560 incpush(PRIVLIB_EXP, TRUE);
2562 incpush(PRIVLIB_EXP, FALSE);
2566 incpush(SITEARCH_EXP, FALSE);
2570 incpush(SITELIB_EXP, TRUE);
2572 incpush(SITELIB_EXP, FALSE);
2576 incpush(".", FALSE);
2580 # define PERLLIB_SEP ';'
2583 # define PERLLIB_SEP '|'
2585 # define PERLLIB_SEP ':'
2588 #ifndef PERLLIB_MANGLE
2589 # define PERLLIB_MANGLE(s,n) (s)
2593 incpush(char *p, int addsubdirs)
2595 SV *subdir = Nullsv;
2601 subdir = sv_newmortal();
2602 if (!archpat_auto) {
2603 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2604 + sizeof("//auto"));
2605 New(55, archpat_auto, len, char);
2606 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2608 for (len = sizeof(ARCHNAME) + 2;
2609 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2610 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2615 /* Break at all separators */
2617 SV *libdir = NEWSV(55,0);
2620 /* skip any consecutive separators */
2621 while ( *p == PERLLIB_SEP ) {
2622 /* Uncomment the next line for PATH semantics */
2623 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2627 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2628 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2633 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2634 p = Nullch; /* break out */
2638 * BEFORE pushing libdir onto @INC we may first push version- and
2639 * archname-specific sub-directories.
2642 struct stat tmpstatbuf;
2647 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2649 while (unix[len-1] == '/') len--; /* Cosmetic */
2650 sv_usepvn(libdir,unix,len);
2653 PerlIO_printf(PerlIO_stderr(),
2654 "Failed to unixify @INC element \"%s\"\n",
2657 /* .../archname/version if -d .../archname/version/auto */
2658 sv_setsv(subdir, libdir);
2659 sv_catpv(subdir, archpat_auto);
2660 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2661 S_ISDIR(tmpstatbuf.st_mode))
2662 av_push(GvAVn(incgv),
2663 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2665 /* .../archname if -d .../archname/auto */
2666 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2667 strlen(patchlevel) + 1, "", 0);
2668 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2669 S_ISDIR(tmpstatbuf.st_mode))
2670 av_push(GvAVn(incgv),
2671 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2674 /* finally push this lib directory on the end of @INC */
2675 av_push(GvAVn(incgv), libdir);
2680 STATIC struct perl_thread *
2683 struct perl_thread *thr;
2686 Newz(53, thr, 1, struct perl_thread);
2687 curcop = &compiling;
2688 thr->cvcache = newHV();
2689 thr->threadsv = newAV();
2690 /* thr->threadsvp is set when find_threadsv is called */
2691 thr->specific = newAV();
2692 thr->errhv = newHV();
2693 thr->flags = THRf_R_JOINABLE;
2694 MUTEX_INIT(&thr->mutex);
2695 /* Handcraft thrsv similarly to mess_sv */
2696 New(53, thrsv, 1, SV);
2697 Newz(53, xpv, 1, XPV);
2698 SvFLAGS(thrsv) = SVt_PV;
2699 SvANY(thrsv) = (void*)xpv;
2700 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2701 SvPVX(thrsv) = (char*)thr;
2702 SvCUR_set(thrsv, sizeof(thr));
2703 SvLEN_set(thrsv, sizeof(thr));
2704 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2708 MUTEX_LOCK(&threads_mutex);
2713 MUTEX_UNLOCK(&threads_mutex);
2715 #ifdef HAVE_THREAD_INTERN
2716 init_thread_intern(thr);
2719 #ifdef SET_THREAD_SELF
2720 SET_THREAD_SELF(thr);
2722 thr->self = pthread_self();
2723 #endif /* SET_THREAD_SELF */
2727 * These must come after the SET_THR because sv_setpvn does
2728 * SvTAINT and the taint fields require dTHR.
2730 toptarget = NEWSV(0,0);
2731 sv_upgrade(toptarget, SVt_PVFM);
2732 sv_setpvn(toptarget, "", 0);
2733 bodytarget = NEWSV(0,0);
2734 sv_upgrade(bodytarget, SVt_PVFM);
2735 sv_setpvn(bodytarget, "", 0);
2736 formtarget = bodytarget;
2737 thr->errsv = newSVpv("", 0);
2738 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2741 #endif /* USE_THREADS */
2744 call_list(I32 oldscope, AV *paramList)
2747 line_t oldline = curcop->cop_line;
2752 while (AvFILL(paramList) >= 0) {
2753 CV *cv = (CV*)av_shift(paramList);
2762 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2763 (void)SvPV(atsv, len);
2766 curcop = &compiling;
2767 curcop->cop_line = oldline;
2768 if (paramList == beginav)
2769 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2771 sv_catpv(atsv, "END failed--cleanup aborted");
2772 while (scopestack_ix > oldscope)
2774 croak("%s", SvPVX(atsv));
2782 /* my_exit() was called */
2783 while (scopestack_ix > oldscope)
2786 curstash = defstash;
2788 call_list(oldscope, endav);
2790 curcop = &compiling;
2791 curcop->cop_line = oldline;
2793 if (paramList == beginav)
2794 croak("BEGIN failed--compilation aborted");
2796 croak("END failed--cleanup aborted");
2802 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2807 curcop = &compiling;
2808 curcop->cop_line = oldline;
2821 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2822 thr, (unsigned long) status));
2823 #endif /* USE_THREADS */
2832 STATUS_NATIVE_SET(status);
2839 my_failure_exit(void)
2842 if (vaxc$errno & 1) {
2843 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2844 STATUS_NATIVE_SET(44);
2847 if (!vaxc$errno && errno) /* unlikely */
2848 STATUS_NATIVE_SET(44);
2850 STATUS_NATIVE_SET(vaxc$errno);
2855 STATUS_POSIX_SET(errno);
2857 exitstatus = STATUS_POSIX >> 8;
2858 if (exitstatus & 255)
2859 STATUS_POSIX_SET(exitstatus);
2861 STATUS_POSIX_SET(255);
2871 register PERL_CONTEXT *cx;
2876 SvREFCNT_dec(e_script);
2880 POPSTACK_TO(mainstack);
2881 if (cxstack_ix >= 0) {
2896 read_e_script(CPerlObj *pPerl, int idx, SV *buf_sv, int maxlen)
2898 read_e_script(int idx, SV *buf_sv, int maxlen)
2902 p = SvPVX(e_script);
2903 nl = strchr(p, '\n');
2904 nl = (nl) ? nl+1 : SvEND(e_script);
2907 sv_catpvn(buf_sv, p, nl-p);
2908 sv_chop(e_script, nl);