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> */
27 dEXTCONST char rcsid[] = "perl.c\nPatch level: ###\n";
35 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
45 curcop = &compiling; \
52 laststype = OP_STAT; \
54 maxsysfd = MAXSYSFD; \
61 laststype = OP_STAT; \
65 static void find_beginning _((void));
66 static void forbid_setid _((char *));
67 static void incpush _((char *, int));
68 static void init_ids _((void));
69 static void init_debugger _((void));
70 static void init_lexer _((void));
71 static void init_main_stash _((void));
73 static struct perl_thread * init_main_thread _((void));
74 #endif /* USE_THREADS */
75 static void init_perllib _((void));
76 static void init_postdump_symbols _((int, char **, char **));
77 static void init_predump_symbols _((void));
78 static void my_exit_jump _((void)) __attribute__((noreturn));
79 static void nuke_stacks _((void));
80 static void open_script _((char *, bool, SV *));
81 static void usage _((char *));
82 static void validate_suid _((char *, char*));
84 static int fdscript = -1;
86 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
87 #include <asm/sigcontext.h>
89 catch_sigsegv(int signo, struct sigcontext_struct sc)
91 PerlProc_signal(SIGSEGV, SIG_DFL);
92 fprintf(stderr, "Segmentation fault dereferencing 0x%lx\n"
93 "return_address = 0x%lx, eip = 0x%lx\n",
94 sc.cr2, __builtin_return_address(0), sc.eip);
95 fprintf(stderr, "thread = 0x%lx\n", (unsigned long)THR);
102 PerlInterpreter *sv_interp;
105 New(53, sv_interp, 1, PerlInterpreter);
110 perl_construct(register PerlInterpreter *sv_interp)
115 struct perl_thread *thr;
116 #endif /* FAKE_THREADS */
117 #endif /* USE_THREADS */
119 if (!(curinterp = sv_interp))
123 Zero(sv_interp, 1, PerlInterpreter);
126 /* Init the real globals (and main thread)? */
131 #ifdef ALLOC_THREAD_KEY
134 if (pthread_key_create(&thr_key, 0))
135 croak("panic: pthread_key_create");
137 MUTEX_INIT(&sv_mutex);
139 * Safe to use basic SV functions from now on (though
140 * not things like mortals or tainting yet).
142 MUTEX_INIT(&eval_mutex);
143 COND_INIT(&eval_cond);
144 MUTEX_INIT(&threads_mutex);
145 COND_INIT(&nthreads_cond);
147 thr = init_main_thread();
148 #endif /* USE_THREADS */
150 linestr = NEWSV(65,80);
151 sv_upgrade(linestr,SVt_PVIV);
153 if (!SvREADONLY(&sv_undef)) {
154 SvREADONLY_on(&sv_undef);
158 SvREADONLY_on(&sv_no);
160 sv_setpv(&sv_yes,Yes);
162 SvREADONLY_on(&sv_yes);
165 nrs = newSVpv("\n", 1);
166 rs = SvREFCNT_inc(nrs);
168 sighandlerp = sighandler;
173 * There is no way we can refer to them from Perl so close them to save
174 * space. The other alternative would be to provide STDAUX and STDPRN
177 (void)fclose(stdaux);
178 (void)fclose(stdprn);
184 perl_destruct_level = 1;
186 if(perl_destruct_level > 0)
191 lex_state = LEX_NOTPARSING;
193 start_env.je_prev = NULL;
194 start_env.je_ret = -1;
195 start_env.je_mustcatch = TRUE;
196 top_env = &start_env;
199 SET_NUMERIC_STANDARD();
200 #if defined(SUBVERSION) && SUBVERSION > 0
201 sprintf(patchlevel, "%7.5f", (double) 5
202 + ((double) PATCHLEVEL / (double) 1000)
203 + ((double) SUBVERSION / (double) 100000));
205 sprintf(patchlevel, "%5.3f", (double) 5 +
206 ((double) PATCHLEVEL / (double) 1000));
209 #if defined(LOCAL_PATCH_COUNT)
210 localpatches = local_patches; /* For possible -v */
213 PerlIO_init(); /* Hook to IO system */
215 fdpid = newAV(); /* for remembering popen pids by fd */
219 New(51,debname,128,char);
220 New(52,debdelim,128,char);
227 perl_destruct(register PerlInterpreter *sv_interp)
230 int destruct_level; /* 0=none, 1=full, 2=full with checks */
235 #endif /* USE_THREADS */
237 if (!(curinterp = sv_interp))
242 /* Pass 1 on any remaining threads: detach joinables, join zombies */
244 MUTEX_LOCK(&threads_mutex);
245 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
246 "perl_destruct: waiting for %d threads...\n",
248 for (t = thr->next; t != thr; t = t->next) {
249 MUTEX_LOCK(&t->mutex);
250 switch (ThrSTATE(t)) {
253 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
254 "perl_destruct: joining zombie %p\n", t));
255 ThrSETSTATE(t, THRf_DEAD);
256 MUTEX_UNLOCK(&t->mutex);
259 * The SvREFCNT_dec below may take a long time (e.g. av
260 * may contain an object scalar whose destructor gets
261 * called) so we have to unlock threads_mutex and start
264 MUTEX_UNLOCK(&threads_mutex);
266 SvREFCNT_dec((SV*)av);
267 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
268 "perl_destruct: joined zombie %p OK\n", t));
270 case THRf_R_JOINABLE:
271 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
272 "perl_destruct: detaching thread %p\n", t));
273 ThrSETSTATE(t, THRf_R_DETACHED);
275 * We unlock threads_mutex and t->mutex in the opposite order
276 * from which we locked them just so that DETACH won't
277 * deadlock if it panics. It's only a breach of good style
278 * not a bug since they are unlocks not locks.
280 MUTEX_UNLOCK(&threads_mutex);
282 MUTEX_UNLOCK(&t->mutex);
285 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
286 "perl_destruct: ignoring %p (state %u)\n",
288 MUTEX_UNLOCK(&t->mutex);
289 /* fall through and out */
292 /* We leave the above "Pass 1" loop with threads_mutex still locked */
294 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
297 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
298 "perl_destruct: final wait for %d threads\n",
300 COND_WAIT(&nthreads_cond, &threads_mutex);
302 /* At this point, we're the last thread */
303 MUTEX_UNLOCK(&threads_mutex);
304 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
305 MUTEX_DESTROY(&threads_mutex);
306 COND_DESTROY(&nthreads_cond);
307 #endif /* !defined(FAKE_THREADS) */
308 #endif /* USE_THREADS */
310 destruct_level = perl_destruct_level;
314 if (s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL")) {
316 if (destruct_level < i)
325 /* We must account for everything. */
327 /* Destroy the main CV and syntax tree */
329 curpad = AvARRAY(comppad);
334 SvREFCNT_dec(main_cv);
339 * Try to destruct global references. We do this first so that the
340 * destructors and destructees still exist. Some sv's might remain.
341 * Non-referenced objects are on their own.
348 /* unhook hooks which will soon be, or use, destroyed data */
349 SvREFCNT_dec(warnhook);
351 SvREFCNT_dec(diehook);
353 SvREFCNT_dec(parsehook);
356 if (destruct_level == 0){
358 DEBUG_P(debprofdump());
360 /* The exit() function will do everything that needs doing. */
364 /* loosen bonds of global variables */
367 (void)PerlIO_close(rsfp);
371 /* Filters for program text */
372 SvREFCNT_dec(rsfp_filters);
373 rsfp_filters = Nullav;
385 sawampersand = FALSE; /* must save all match strings */
386 sawstudy = FALSE; /* do fbm_instr on all strings */
401 /* magical thingies */
403 Safefree(ofs); /* $, */
406 Safefree(ors); /* $\ */
409 SvREFCNT_dec(nrs); /* $\ helper */
412 multiline = 0; /* $* */
414 SvREFCNT_dec(statname);
418 /* defgv, aka *_ should be taken care of elsewhere */
420 /* clean up after study() */
421 SvREFCNT_dec(lastscream);
423 Safefree(screamfirst);
425 Safefree(screamnext);
428 /* startup and shutdown function lists */
429 SvREFCNT_dec(beginav);
431 SvREFCNT_dec(initav);
436 /* temp stack during pp_sort() */
437 SvREFCNT_dec(sortstack);
440 /* shortcuts just get cleared */
450 /* reset so print() ends up where we expect */
453 /* Prepare to destruct main symbol table. */
460 if (destruct_level >= 2) {
461 if (scopestack_ix != 0)
462 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
463 (long)scopestack_ix);
464 if (savestack_ix != 0)
465 warn("Unbalanced saves: %ld more saves than restores\n",
467 if (tmps_floor != -1)
468 warn("Unbalanced tmps: %ld more allocs than frees\n",
469 (long)tmps_floor + 1);
470 if (cxstack_ix != -1)
471 warn("Unbalanced context: %ld more PUSHes than POPs\n",
472 (long)cxstack_ix + 1);
475 /* Now absolutely destruct everything, somehow or other, loops or no. */
477 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
478 while (sv_count != 0 && sv_count != last_sv_count) {
479 last_sv_count = sv_count;
482 SvFLAGS(strtab) &= ~SVTYPEMASK;
483 SvFLAGS(strtab) |= SVt_PVHV;
485 /* Destruct the global string table. */
487 /* Yell and reset the HeVAL() slots that are still holding refcounts,
488 * so that sv_free() won't fail on them.
497 array = HvARRAY(strtab);
501 warn("Unbalanced string table refcount: (%d) for \"%s\"",
502 HeVAL(hent) - Nullsv, HeKEY(hent));
503 HeVAL(hent) = Nullsv;
513 SvREFCNT_dec(strtab);
516 warn("Scalars leaked: %ld\n", (long)sv_count);
520 /* No SVs have survived, need to clean out */
524 Safefree(origfilename);
526 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
528 DEBUG_P(debprofdump());
530 MUTEX_DESTROY(&sv_mutex);
531 MUTEX_DESTROY(&eval_mutex);
532 COND_DESTROY(&eval_cond);
534 /* As the penultimate thing, free the non-arena SV for thrsv */
535 Safefree(SvPVX(thrsv));
536 Safefree(SvANY(thrsv));
539 #endif /* USE_THREADS */
541 /* As the absolutely last thing, free the non-arena SV for mess() */
544 /* we know that type >= SVt_PV */
546 Safefree(SvPVX(mess_sv));
547 Safefree(SvANY(mess_sv));
554 perl_free(PerlInterpreter *sv_interp)
556 if (!(curinterp = sv_interp))
562 perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char **argv, char **env)
567 char *scriptname = NULL;
568 VOL bool dosearch = FALSE;
575 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
578 croak("suidperl is no longer needed since the kernel can now execute\n\
579 setuid perl scripts securely.\n");
583 if (!(curinterp = sv_interp))
586 #if defined(NeXT) && defined(__DYNAMIC__)
587 _dyld_lookup_and_bind
588 ("__environ", (unsigned long *) &environ_pointer, NULL);
593 #ifndef VMS /* VMS doesn't have environ array */
594 origenviron = environ;
600 /* Come here if running an undumped a.out. */
602 origfilename = savepv(argv[0]);
604 cxstack_ix = -1; /* start label stack again */
606 init_postdump_symbols(argc,argv,env);
611 curpad = AvARRAY(comppad);
616 SvREFCNT_dec(main_cv);
620 oldscope = scopestack_ix;
628 /* my_exit() was called */
629 while (scopestack_ix > oldscope)
634 call_list(oldscope, endav);
636 return STATUS_NATIVE_EXPORT;
639 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
643 sv_setpvn(linestr,"",0);
644 sv = newSVpv("",0); /* first used for -I flags */
648 for (argc--,argv++; argc > 0; argc--,argv++) {
649 if (argv[0][0] != '-' || !argv[0][1])
653 validarg = " PHOOEY ";
678 if (s = moreswitches(s))
688 if (euid != uid || egid != gid)
689 croak("No -e allowed in setuid scripts");
691 e_tmpname = savepv(TMPPATH);
692 (void)PerlLIO_mktemp(e_tmpname);
694 croak("Can't mktemp()");
695 e_fp = PerlIO_open(e_tmpname,"w");
697 croak("Cannot open temporary file");
702 PerlIO_puts(e_fp,argv[1]);
706 croak("No code specified for -e");
707 (void)PerlIO_putc(e_fp,'\n');
709 case 'I': /* -I handled both here and in moreswitches() */
711 if (!*++s && (s=argv[1]) != Nullch) {
714 while (s && isSPACE(*s))
718 for (e = s; *e && !isSPACE(*e); e++) ;
725 } /* XXX else croak? */
739 preambleav = newAV();
740 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
742 Sv = newSVpv("print myconfig();",0);
744 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
746 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
748 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
749 sv_catpv(Sv,"\" Compile-time options:");
751 sv_catpv(Sv," DEBUGGING");
754 sv_catpv(Sv," NO_EMBED");
757 sv_catpv(Sv," MULTIPLICITY");
759 sv_catpv(Sv,"\\n\",");
761 #if defined(LOCAL_PATCH_COUNT)
762 if (LOCAL_PATCH_COUNT > 0) {
764 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
765 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
767 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
771 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
774 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
776 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
781 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
782 print \" \\%ENV:\\n @env\\n\" if @env; \
783 print \" \\@INC:\\n @INC\\n\";");
786 Sv = newSVpv("config_vars(qw(",0);
791 av_push(preambleav, Sv);
792 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
803 if (!*++s || isSPACE(*s)) {
807 /* catch use of gnu style long options */
808 if (strEQ(s, "version")) {
812 if (strEQ(s, "help")) {
819 croak("Unrecognized switch: -%s (-h will show valid options)",s);
824 if (!tainting && (s = PerlEnv_getenv("PERL5OPT"))) {
835 if (!strchr("DIMUdmw", *s))
836 croak("Illegal switch in PERL5OPT: -%c", *s);
842 scriptname = argv[0];
844 if (PerlIO_flush(e_fp) || PerlIO_error(e_fp) || PerlIO_close(e_fp)) {
846 warn("Did you forget to compile with -DMULTIPLICITY?");
848 croak("Can't write to temp file for -e: %s", Strerror(errno));
852 scriptname = e_tmpname;
854 else if (scriptname == Nullch) {
856 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
864 open_script(scriptname,dosearch,sv);
866 validate_suid(validarg, scriptname);
871 main_cv = compcv = (CV*)NEWSV(1104,0);
872 sv_upgrade((SV *)compcv, SVt_PVCV);
876 av_push(comppad, Nullsv);
877 curpad = AvARRAY(comppad);
878 comppad_name = newAV();
879 comppad_name_fill = 0;
880 min_intro_pending = 0;
883 av_store(comppad_name, 0, newSVpv("@_", 2));
884 curpad[0] = (SV*)newAV();
885 SvPADMY_on(curpad[0]); /* XXX Needed? */
887 New(666, CvMUTEXP(compcv), 1, perl_mutex);
888 MUTEX_INIT(CvMUTEXP(compcv));
889 #endif /* USE_THREADS */
891 comppadlist = newAV();
892 AvREAL_off(comppadlist);
893 av_store(comppadlist, 0, (SV*)comppad_name);
894 av_store(comppadlist, 1, (SV*)comppad);
895 CvPADLIST(compcv) = comppadlist;
897 boot_core_UNIVERSAL();
899 (*xsinit)(); /* in case linked C routines want magical variables */
900 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
904 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
905 DEBUG_L(PerlProc_signal(SIGSEGV, (void(*)(int))catch_sigsegv););
908 init_predump_symbols();
910 init_postdump_symbols(argc,argv,env);
914 /* now parse the script */
916 SETERRNO(0,SS$_NORMAL);
918 if (yyparse() || error_count) {
920 croak("%s had compilation errors.\n", origfilename);
922 croak("Execution of %s aborted due to compilation errors.\n",
926 curcop->cop_line = 0;
930 (void)UNLINK(e_tmpname);
935 /* now that script is parsed, we can modify record separator */
937 rs = SvREFCNT_inc(nrs);
938 sv_setsv(perl_get_sv("/", TRUE), rs);
949 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
950 dump_mstats("after compilation:");
960 perl_run(PerlInterpreter *sv_interp)
967 if (!(curinterp = sv_interp))
970 oldscope = scopestack_ix;
975 cxstack_ix = -1; /* start context stack again */
978 /* my_exit() was called */
979 while (scopestack_ix > oldscope)
984 call_list(oldscope, endav);
986 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
987 dump_mstats("after execution: ");
990 return STATUS_NATIVE_EXPORT;
993 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
998 if (curstack != mainstack) {
1000 SWITCHSTACK(curstack, mainstack);
1005 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1006 sawampersand ? "Enabling" : "Omitting"));
1009 DEBUG_x(dump_all());
1010 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1012 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1013 (unsigned long) thr));
1014 #endif /* USE_THREADS */
1017 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1020 if (PERLDB_SINGLE && DBsingle)
1021 sv_setiv(DBsingle, 1);
1023 call_list(oldscope, initav);
1033 else if (main_start) {
1034 CvDEPTH(main_cv) = 1;
1045 perl_get_sv(char *name, I32 create)
1049 if (name[1] == '\0' && !isALPHA(name[0])) {
1050 PADOFFSET tmp = find_threadsv(name);
1051 if (tmp != NOT_IN_PAD) {
1053 return THREADSV(tmp);
1056 #endif /* USE_THREADS */
1057 gv = gv_fetchpv(name, create, SVt_PV);
1064 perl_get_av(char *name, I32 create)
1066 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1075 perl_get_hv(char *name, I32 create)
1077 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1086 perl_get_cv(char *name, I32 create)
1088 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1089 if (create && !GvCVu(gv))
1090 return newSUB(start_subparse(FALSE, 0),
1091 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1099 /* Be sure to refetch the stack pointer after calling these routines. */
1102 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1104 /* See G_* flags in cop.h */
1105 /* null terminated arg list */
1112 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1117 return perl_call_pv(sub_name, flags);
1121 perl_call_pv(char *sub_name, I32 flags)
1122 /* name of the subroutine */
1123 /* See G_* flags in cop.h */
1125 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1129 perl_call_method(char *methname, I32 flags)
1130 /* name of the subroutine */
1131 /* See G_* flags in cop.h */
1137 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1140 return perl_call_sv(*stack_sp--, flags);
1143 /* May be called with any of a CV, a GV, or an SV containing the name. */
1145 perl_call_sv(SV *sv, I32 flags)
1147 /* See G_* flags in cop.h */
1150 LOGOP myop; /* fake syntax tree node */
1156 bool oldcatch = CATCH_GET;
1161 if (flags & G_DISCARD) {
1166 Zero(&myop, 1, LOGOP);
1167 myop.op_next = Nullop;
1168 if (!(flags & G_NOARGS))
1169 myop.op_flags |= OPf_STACKED;
1170 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1171 (flags & G_ARRAY) ? OPf_WANT_LIST :
1176 EXTEND(stack_sp, 1);
1179 oldscope = scopestack_ix;
1181 if (PERLDB_SUB && curstash != debstash
1182 /* Handle first BEGIN of -d. */
1183 && (DBcv || (DBcv = GvCV(DBsub)))
1184 /* Try harder, since this may have been a sighandler, thus
1185 * curstash may be meaningless. */
1186 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash))
1187 op->op_private |= OPpENTERSUB_DB;
1189 if (flags & G_EVAL) {
1190 cLOGOP->op_other = op;
1192 /* we're trying to emulate pp_entertry() here */
1194 register PERL_CONTEXT *cx;
1195 I32 gimme = GIMME_V;
1200 push_return(op->op_next);
1201 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1203 eval_root = op; /* Only needed so that goto works right. */
1206 if (flags & G_KEEPERR)
1221 /* my_exit() was called */
1222 curstash = defstash;
1226 croak("Callback called exit");
1235 stack_sp = stack_base + oldmark;
1236 if (flags & G_ARRAY)
1240 *++stack_sp = &sv_undef;
1248 if (op == (OP*)&myop)
1249 op = pp_entersub(ARGS);
1252 retval = stack_sp - (stack_base + oldmark);
1253 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1257 if (flags & G_EVAL) {
1258 if (scopestack_ix > oldscope) {
1262 register PERL_CONTEXT *cx;
1274 CATCH_SET(oldcatch);
1276 if (flags & G_DISCARD) {
1277 stack_sp = stack_base + oldmark;
1286 /* Eval a string. The G_EVAL flag is always assumed. */
1289 perl_eval_sv(SV *sv, I32 flags)
1291 /* See G_* flags in cop.h */
1294 UNOP myop; /* fake syntax tree node */
1296 I32 oldmark = sp - stack_base;
1303 if (flags & G_DISCARD) {
1311 EXTEND(stack_sp, 1);
1313 oldscope = scopestack_ix;
1315 if (!(flags & G_NOARGS))
1316 myop.op_flags = OPf_STACKED;
1317 myop.op_next = Nullop;
1318 myop.op_type = OP_ENTEREVAL;
1319 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1320 (flags & G_ARRAY) ? OPf_WANT_LIST :
1322 if (flags & G_KEEPERR)
1323 myop.op_flags |= OPf_SPECIAL;
1333 /* my_exit() was called */
1334 curstash = defstash;
1338 croak("Callback called exit");
1347 stack_sp = stack_base + oldmark;
1348 if (flags & G_ARRAY)
1352 *++stack_sp = &sv_undef;
1357 if (op == (OP*)&myop)
1358 op = pp_entereval(ARGS);
1361 retval = stack_sp - (stack_base + oldmark);
1362 if (!(flags & G_KEEPERR))
1367 if (flags & G_DISCARD) {
1368 stack_sp = stack_base + oldmark;
1378 perl_eval_pv(char *p, I32 croak_on_error)
1381 SV* sv = newSVpv(p, 0);
1384 perl_eval_sv(sv, G_SCALAR);
1391 if (croak_on_error && SvTRUE(ERRSV))
1392 croak(SvPVx(ERRSV, na));
1397 /* Require a module. */
1400 perl_require_pv(char *pv)
1402 SV* sv = sv_newmortal();
1403 sv_setpv(sv, "require '");
1406 perl_eval_sv(sv, G_DISCARD);
1410 magicname(char *sym, char *name, I32 namlen)
1414 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1415 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1419 usage(char *name) /* XXX move this out into a module ? */
1422 /* This message really ought to be max 23 lines.
1423 * Removed -h because the user already knows that opton. Others? */
1425 static char *usage[] = {
1426 "-0[octal] specify record separator (\\0, if no argument)",
1427 "-a autosplit mode with -n or -p (splits $_ into @F)",
1428 "-c check syntax only (runs BEGIN and END blocks)",
1429 "-d[:debugger] run scripts under debugger",
1430 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1431 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1432 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1433 "-i[extension] edit <> files in place (make backup if extension supplied)",
1434 "-Idirectory specify @INC/#include directory (may be used more than once)",
1435 "-l[octal] enable line ending processing, specifies line terminator",
1436 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1437 "-n assume 'while (<>) { ... }' loop around your script",
1438 "-p assume loop like -n but print line also like sed",
1439 "-P run script through C preprocessor before compilation",
1440 "-s enable some switch parsing for switches after script name",
1441 "-S look for the script using PATH environment variable",
1442 "-T turn on tainting checks",
1443 "-u dump core after parsing script",
1444 "-U allow unsafe operations",
1445 "-v print version number and patchlevel of perl",
1446 "-V[:variable] print perl configuration information",
1447 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1448 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1454 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1456 printf("\n %s", *p++);
1459 /* This routine handles any switches that can be given during run */
1462 moreswitches(char *s)
1471 rschar = scan_oct(s, 4, &numlen);
1473 if (rschar & ~((U8)~0))
1475 else if (!rschar && numlen >= 2)
1476 nrs = newSVpv("", 0);
1479 nrs = newSVpv(&ch, 1);
1485 splitstr = savepv(s + 1);
1499 if (*s == ':' || *s == '=') {
1500 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1504 perldb = PERLDB_ALL;
1511 if (isALPHA(s[1])) {
1512 static char debopts[] = "psltocPmfrxuLHXD";
1515 for (s++; *s && (d = strchr(debopts,*s)); s++)
1516 debug |= 1 << (d - debopts);
1520 for (s++; isDIGIT(*s); s++) ;
1522 debug |= 0x80000000;
1524 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1525 for (s++; isALNUM(*s); s++) ;
1535 inplace = savepv(s+1);
1537 for (s = inplace; *s && !isSPACE(*s); s++) ;
1541 case 'I': /* -I handled both here and in parse_perl() */
1544 while (*s && isSPACE(*s))
1548 for (e = s; *e && !isSPACE(*e); e++) ;
1549 p = savepvn(s, e-s);
1555 croak("No space allowed after -I");
1565 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1575 ors = SvPV(nrs, orslen);
1576 ors = savepvn(ors, orslen);
1580 forbid_setid("-M"); /* XXX ? */
1583 forbid_setid("-m"); /* XXX ? */
1588 /* -M-foo == 'no foo' */
1589 if (*s == '-') { use = "no "; ++s; }
1590 sv = newSVpv(use,0);
1592 /* We allow -M'Module qw(Foo Bar)' */
1593 while(isALNUM(*s) || *s==':') ++s;
1595 sv_catpv(sv, start);
1596 if (*(start-1) == 'm') {
1598 croak("Can't use '%c' after -mname", *s);
1599 sv_catpv( sv, " ()");
1602 sv_catpvn(sv, start, s-start);
1603 sv_catpv(sv, " split(/,/,q{");
1608 if (preambleav == NULL)
1609 preambleav = newAV();
1610 av_push(preambleav, sv);
1613 croak("No space allowed after -%c", *(s-1));
1630 croak("Too late for \"-T\" option");
1642 #if defined(SUBVERSION) && SUBVERSION > 0
1643 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1644 PATCHLEVEL, SUBVERSION, ARCHNAME);
1646 printf("\nThis is perl, version %s built for %s",
1647 patchlevel, ARCHNAME);
1649 #if defined(LOCAL_PATCH_COUNT)
1650 if (LOCAL_PATCH_COUNT > 0)
1651 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1652 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1655 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1657 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1660 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1661 printf("djgpp v2 port (perl5004) by Laszlo Molnar, 1997\n");
1664 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1665 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1668 printf("atariST series port, ++jrb bammi@cadence.com\n");
1671 Perl may be copied only under the terms of either the Artistic License or the\n\
1672 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n");
1680 if (s[1] == '-') /* Additional switches on #! line. */
1691 #ifdef ALTERNATE_SHEBANG
1692 case 'S': /* OS/2 needs -S on "extproc" line. */
1700 croak("Can't emulate -%.1s on #! line",s);
1705 /* compliments of Tom Christiansen */
1707 /* unexec() can be found in the Gnu emacs distribution */
1718 prog = newSVpv(BIN_EXP);
1719 sv_catpv(prog, "/perl");
1720 file = newSVpv(origfilename);
1721 sv_catpv(file, ".perldump");
1723 status = unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1725 PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n",
1726 SvPVX(prog), SvPVX(file));
1727 PerlProc_exit(status);
1730 # include <lib$routines.h>
1731 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1733 ABORT(); /* for use with undump */
1739 init_main_stash(void)
1744 /* Note that strtab is a rather special HV. Assumptions are made
1745 about not iterating on it, and not adding tie magic to it.
1746 It is properly deallocated in perl_destruct() */
1748 HvSHAREKEYS_off(strtab); /* mandatory */
1749 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1750 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1752 curstash = defstash = newHV();
1753 curstname = newSVpv("main",4);
1754 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1755 SvREFCNT_dec(GvHV(gv));
1756 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1758 HvNAME(defstash) = savepv("main");
1759 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1761 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1762 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1764 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1765 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1766 sv_setpvn(ERRSV, "", 0);
1767 curstash = defstash;
1768 compiling.cop_stash = defstash;
1769 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1770 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1771 /* We must init $/ before switches are processed. */
1772 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1775 #ifdef CAN_PROTOTYPE
1777 open_script(char *scriptname, bool dosearch, SV *sv)
1780 open_script(scriptname,dosearch,sv)
1787 char *xfound = Nullch;
1788 char *xfailed = Nullch;
1792 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
1793 # define SEARCH_EXTS ".bat", ".cmd", NULL
1794 # define MAX_EXT_LEN 4
1797 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
1798 # define MAX_EXT_LEN 4
1801 # define SEARCH_EXTS ".pl", ".com", NULL
1802 # define MAX_EXT_LEN 4
1804 /* additional extensions to try in each dir if scriptname not found */
1806 char *ext[] = { SEARCH_EXTS };
1807 int extidx = 0, i = 0;
1808 char *curext = Nullch;
1810 # define MAX_EXT_LEN 0
1814 * If dosearch is true and if scriptname does not contain path
1815 * delimiters, search the PATH for scriptname.
1817 * If SEARCH_EXTS is also defined, will look for each
1818 * scriptname{SEARCH_EXTS} whenever scriptname is not found
1819 * while searching the PATH.
1821 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
1822 * proceeds as follows:
1823 * If DOSISH or VMSISH:
1824 * + look for ./scriptname{,.foo,.bar}
1825 * + search the PATH for scriptname{,.foo,.bar}
1828 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
1829 * this will not look in '.' if it's not in the PATH)
1833 # ifdef ALWAYS_DEFTYPES
1834 len = strlen(scriptname);
1835 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
1836 int hasdir, idx = 0, deftypes = 1;
1839 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
1842 int hasdir, idx = 0, deftypes = 1;
1845 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
1847 /* The first time through, just add SEARCH_EXTS to whatever we
1848 * already have, so we can check for default file types. */
1850 (!hasdir && my_trnlnm("DCL$PATH",tokenbuf,idx++)) )
1856 if ((strlen(tokenbuf) + strlen(scriptname)
1857 + MAX_EXT_LEN) >= sizeof tokenbuf)
1858 continue; /* don't search dir with too-long name */
1859 strcat(tokenbuf, scriptname);
1863 if (strEQ(scriptname, "-"))
1865 if (dosearch) { /* Look in '.' first. */
1866 char *cur = scriptname;
1868 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
1870 if (strEQ(ext[i++],curext)) {
1871 extidx = -1; /* already has an ext */
1876 DEBUG_p(PerlIO_printf(Perl_debug_log,
1877 "Looking for %s\n",cur));
1878 if (Stat(cur,&statbuf) >= 0) {
1886 if (cur == scriptname) {
1887 len = strlen(scriptname);
1888 if (len+MAX_EXT_LEN+1 >= sizeof(tokenbuf))
1890 cur = strcpy(tokenbuf, scriptname);
1892 } while (extidx >= 0 && ext[extidx] /* try an extension? */
1893 && strcpy(tokenbuf+len, ext[extidx++]));
1898 if (dosearch && !strchr(scriptname, '/')
1900 && !strchr(scriptname, '\\')
1902 && (s = PerlEnv_getenv("PATH"))) {
1905 bufend = s + strlen(s);
1906 while (s < bufend) {
1907 #if defined(atarist) || defined(DOSISH)
1912 && *s != ';'; len++, s++) {
1913 if (len < sizeof tokenbuf)
1916 if (len < sizeof tokenbuf)
1917 tokenbuf[len] = '\0';
1918 #else /* ! (atarist || DOSISH) */
1919 s = delimcpy(tokenbuf, tokenbuf + sizeof tokenbuf, s, bufend,
1922 #endif /* ! (atarist || DOSISH) */
1925 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tokenbuf)
1926 continue; /* don't search dir with too-long name */
1928 #if defined(atarist) || defined(DOSISH)
1929 && tokenbuf[len - 1] != '/'
1930 && tokenbuf[len - 1] != '\\'
1933 tokenbuf[len++] = '/';
1934 if (len == 2 && tokenbuf[0] == '.')
1936 (void)strcpy(tokenbuf + len, scriptname);
1940 len = strlen(tokenbuf);
1941 if (extidx > 0) /* reset after previous loop */
1945 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tokenbuf));
1946 retval = Stat(tokenbuf,&statbuf);
1948 } while ( retval < 0 /* not there */
1949 && extidx>=0 && ext[extidx] /* try an extension? */
1950 && strcpy(tokenbuf+len, ext[extidx++])
1955 if (S_ISREG(statbuf.st_mode)
1956 && cando(S_IRUSR,TRUE,&statbuf)
1958 && cando(S_IXUSR,TRUE,&statbuf)
1962 xfound = tokenbuf; /* bingo! */
1966 xfailed = savepv(tokenbuf);
1969 if (!xfound && !seen_dot && !xfailed && (Stat(scriptname,&statbuf) < 0))
1971 seen_dot = 1; /* Disable message. */
1973 croak("Can't %s %s%s%s",
1974 (xfailed ? "execute" : "find"),
1975 (xfailed ? xfailed : scriptname),
1976 (xfailed ? "" : " on PATH"),
1977 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
1980 scriptname = xfound;
1983 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1984 char *s = scriptname + 8;
1993 origfilename = savepv(e_tmpname ? "-e" : scriptname);
1994 curcop->cop_filegv = gv_fetchfile(origfilename);
1995 if (strEQ(origfilename,"-"))
1997 if (fdscript >= 0) {
1998 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
1999 #if defined(HAS_FCNTL) && defined(F_SETFD)
2001 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2004 else if (preprocess) {
2005 char *cpp_cfg = CPPSTDIN;
2006 SV *cpp = NEWSV(0,0);
2007 SV *cmd = NEWSV(0,0);
2009 if (strEQ(cpp_cfg, "cppstdin"))
2010 sv_catpvf(cpp, "%s/", BIN_EXP);
2011 sv_catpv(cpp, cpp_cfg);
2014 sv_catpv(sv,PRIVLIB_EXP);
2018 sed %s -e \"/^[^#]/b\" \
2019 -e \"/^#[ ]*include[ ]/b\" \
2020 -e \"/^#[ ]*define[ ]/b\" \
2021 -e \"/^#[ ]*if[ ]/b\" \
2022 -e \"/^#[ ]*ifdef[ ]/b\" \
2023 -e \"/^#[ ]*ifndef[ ]/b\" \
2024 -e \"/^#[ ]*else/b\" \
2025 -e \"/^#[ ]*elif[ ]/b\" \
2026 -e \"/^#[ ]*undef[ ]/b\" \
2027 -e \"/^#[ ]*endif/b\" \
2030 (doextract ? "-e \"1,/^#/d\n\"" : ""),
2033 %s %s -e '/^[^#]/b' \
2034 -e '/^#[ ]*include[ ]/b' \
2035 -e '/^#[ ]*define[ ]/b' \
2036 -e '/^#[ ]*if[ ]/b' \
2037 -e '/^#[ ]*ifdef[ ]/b' \
2038 -e '/^#[ ]*ifndef[ ]/b' \
2039 -e '/^#[ ]*else/b' \
2040 -e '/^#[ ]*elif[ ]/b' \
2041 -e '/^#[ ]*undef[ ]/b' \
2042 -e '/^#[ ]*endif/b' \
2050 (doextract ? "-e '1,/^#/d\n'" : ""),
2052 scriptname, cpp, sv, CPPMINUS);
2054 #ifdef IAMSUID /* actually, this is caught earlier */
2055 if (euid != uid && !euid) { /* if running suidperl */
2057 (void)seteuid(uid); /* musn't stay setuid root */
2060 (void)setreuid((Uid_t)-1, uid);
2062 #ifdef HAS_SETRESUID
2063 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
2069 if (geteuid() != uid)
2070 croak("Can't do seteuid!\n");
2072 #endif /* IAMSUID */
2073 rsfp = PerlProc_popen(SvPVX(cmd), "r");
2077 else if (!*scriptname) {
2078 forbid_setid("program input from stdin");
2079 rsfp = PerlIO_stdin();
2082 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2083 #if defined(HAS_FCNTL) && defined(F_SETFD)
2085 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2093 #ifndef IAMSUID /* in case script is not readable before setuid */
2094 if (euid && Stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2095 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2097 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2098 croak("Can't do setuid\n");
2102 croak("Can't open perl script \"%s\": %s\n",
2103 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2108 validate_suid(char *validarg, char *scriptname)
2112 /* do we need to emulate setuid on scripts? */
2114 /* This code is for those BSD systems that have setuid #! scripts disabled
2115 * in the kernel because of a security problem. Merely defining DOSUID
2116 * in perl will not fix that problem, but if you have disabled setuid
2117 * scripts in the kernel, this will attempt to emulate setuid and setgid
2118 * on scripts that have those now-otherwise-useless bits set. The setuid
2119 * root version must be called suidperl or sperlN.NNN. If regular perl
2120 * discovers that it has opened a setuid script, it calls suidperl with
2121 * the same argv that it had. If suidperl finds that the script it has
2122 * just opened is NOT setuid root, it sets the effective uid back to the
2123 * uid. We don't just make perl setuid root because that loses the
2124 * effective uid we had before invoking perl, if it was different from the
2127 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2128 * be defined in suidperl only. suidperl must be setuid root. The
2129 * Configure script will set this up for you if you want it.
2136 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2137 croak("Can't stat script \"%s\"",origfilename);
2138 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2142 #ifndef HAS_SETREUID
2143 /* On this access check to make sure the directories are readable,
2144 * there is actually a small window that the user could use to make
2145 * filename point to an accessible directory. So there is a faint
2146 * chance that someone could execute a setuid script down in a
2147 * non-accessible directory. I don't know what to do about that.
2148 * But I don't think it's too important. The manual lies when
2149 * it says access() is useful in setuid programs.
2151 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2152 croak("Permission denied");
2154 /* If we can swap euid and uid, then we can determine access rights
2155 * with a simple stat of the file, and then compare device and
2156 * inode to make sure we did stat() on the same file we opened.
2157 * Then we just have to make sure he or she can execute it.
2160 struct stat tmpstatbuf;
2164 setreuid(euid,uid) < 0
2167 setresuid(euid,uid,(Uid_t)-1) < 0
2170 || getuid() != euid || geteuid() != uid)
2171 croak("Can't swap uid and euid"); /* really paranoid */
2172 if (Stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2173 croak("Permission denied"); /* testing full pathname here */
2174 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2175 tmpstatbuf.st_ino != statbuf.st_ino) {
2176 (void)PerlIO_close(rsfp);
2177 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2179 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2180 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2181 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2182 (long)statbuf.st_dev, (long)statbuf.st_ino,
2183 SvPVX(GvSV(curcop->cop_filegv)),
2184 (long)statbuf.st_uid, (long)statbuf.st_gid);
2185 (void)PerlProc_pclose(rsfp);
2187 croak("Permission denied\n");
2191 setreuid(uid,euid) < 0
2193 # if defined(HAS_SETRESUID)
2194 setresuid(uid,euid,(Uid_t)-1) < 0
2197 || getuid() != uid || geteuid() != euid)
2198 croak("Can't reswap uid and euid");
2199 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2200 croak("Permission denied\n");
2202 #endif /* HAS_SETREUID */
2203 #endif /* IAMSUID */
2205 if (!S_ISREG(statbuf.st_mode))
2206 croak("Permission denied");
2207 if (statbuf.st_mode & S_IWOTH)
2208 croak("Setuid/gid script is writable by world");
2209 doswitches = FALSE; /* -s is insecure in suid */
2211 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2212 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2213 croak("No #! line");
2214 s = SvPV(linestr,na)+2;
2216 while (!isSPACE(*s)) s++;
2217 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2218 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2219 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2220 croak("Not a perl script");
2221 while (*s == ' ' || *s == '\t') s++;
2223 * #! arg must be what we saw above. They can invoke it by
2224 * mentioning suidperl explicitly, but they may not add any strange
2225 * arguments beyond what #! says if they do invoke suidperl that way.
2227 len = strlen(validarg);
2228 if (strEQ(validarg," PHOOEY ") ||
2229 strnNE(s,validarg,len) || !isSPACE(s[len]))
2230 croak("Args must match #! line");
2233 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2234 euid == statbuf.st_uid)
2236 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2237 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2238 #endif /* IAMSUID */
2240 if (euid) { /* oops, we're not the setuid root perl */
2241 (void)PerlIO_close(rsfp);
2244 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2246 croak("Can't do setuid\n");
2249 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2251 (void)setegid(statbuf.st_gid);
2254 (void)setregid((Gid_t)-1,statbuf.st_gid);
2256 #ifdef HAS_SETRESGID
2257 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2259 setgid(statbuf.st_gid);
2263 if (getegid() != statbuf.st_gid)
2264 croak("Can't do setegid!\n");
2266 if (statbuf.st_mode & S_ISUID) {
2267 if (statbuf.st_uid != euid)
2269 (void)seteuid(statbuf.st_uid); /* all that for this */
2272 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2274 #ifdef HAS_SETRESUID
2275 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2277 setuid(statbuf.st_uid);
2281 if (geteuid() != statbuf.st_uid)
2282 croak("Can't do seteuid!\n");
2284 else if (uid) { /* oops, mustn't run as root */
2286 (void)seteuid((Uid_t)uid);
2289 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2291 #ifdef HAS_SETRESUID
2292 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2298 if (geteuid() != uid)
2299 croak("Can't do seteuid!\n");
2302 if (!cando(S_IXUSR,TRUE,&statbuf))
2303 croak("Permission denied\n"); /* they can't do this */
2306 else if (preprocess)
2307 croak("-P not allowed for setuid/setgid script\n");
2308 else if (fdscript >= 0)
2309 croak("fd script not allowed in suidperl\n");
2311 croak("Script is not setuid/setgid in suidperl\n");
2313 /* We absolutely must clear out any saved ids here, so we */
2314 /* exec the real perl, substituting fd script for scriptname. */
2315 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2316 PerlIO_rewind(rsfp);
2317 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2318 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2319 if (!origargv[which])
2320 croak("Permission denied");
2321 origargv[which] = savepv(form("/dev/fd/%d/%s",
2322 PerlIO_fileno(rsfp), origargv[which]));
2323 #if defined(HAS_FCNTL) && defined(F_SETFD)
2324 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2326 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2327 croak("Can't do setuid\n");
2328 #endif /* IAMSUID */
2330 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2331 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2333 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2334 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2336 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2339 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2340 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2341 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2342 /* not set-id, must be wrapped */
2348 find_beginning(void)
2350 register char *s, *s2;
2352 /* skip forward in input to the real script? */
2356 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2357 croak("No Perl script found in input\n");
2358 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2359 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2361 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2363 while (*s == ' ' || *s == '\t') s++;
2365 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2366 if (strnEQ(s2-4,"perl",4))
2368 while (s = moreswitches(s)) ;
2370 if (cddir && PerlDir_chdir(cddir) < 0)
2371 croak("Can't chdir to %s",cddir);
2379 uid = (int)getuid();
2380 euid = (int)geteuid();
2381 gid = (int)getgid();
2382 egid = (int)getegid();
2387 tainting |= (uid && (euid != uid || egid != gid));
2391 forbid_setid(char *s)
2394 croak("No %s allowed while running setuid", s);
2396 croak("No %s allowed while running setgid", s);
2403 curstash = debstash;
2404 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2406 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2407 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2408 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2409 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2410 sv_setiv(DBsingle, 0);
2411 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2412 sv_setiv(DBtrace, 0);
2413 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2414 sv_setiv(DBsignal, 0);
2415 curstash = defstash;
2419 init_stacks(ARGSproto)
2422 mainstack = curstack; /* remember in case we switch stacks */
2423 AvREAL_off(curstack); /* not a real array */
2424 av_extend(curstack,127);
2426 stack_base = AvARRAY(curstack);
2427 stack_sp = stack_base;
2428 stack_max = stack_base + 127;
2430 cxstack_max = 8192 / sizeof(PERL_CONTEXT) - 2; /* Use most of 8K. */
2431 New(50,cxstack,cxstack_max + 1,PERL_CONTEXT);
2434 New(50,tmps_stack,128,SV*);
2440 * The following stacks almost certainly should be per-interpreter,
2441 * but for now they're not. XXX
2445 markstack_ptr = markstack;
2447 New(54,markstack,64,I32);
2448 markstack_ptr = markstack;
2449 markstack_max = markstack + 64;
2455 New(54,scopestack,32,I32);
2457 scopestack_max = 32;
2463 New(54,savestack,128,ANY);
2465 savestack_max = 128;
2471 New(54,retstack,16,OP*);
2482 Safefree(tmps_stack);
2489 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2498 subname = newSVpv("main",4);
2502 init_predump_symbols(void)
2508 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2509 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2510 GvMULTI_on(stdingv);
2511 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2512 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2514 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2516 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2518 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2520 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2522 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2524 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2525 GvMULTI_on(othergv);
2526 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2527 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2529 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2531 statname = NEWSV(66,0); /* last filename we did stat on */
2534 osname = savepv(OSNAME);
2538 init_postdump_symbols(register int argc, register char **argv, register char **env)
2545 argc--,argv++; /* skip name of script */
2547 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2550 if (argv[0][1] == '-') {
2554 if (s = strchr(argv[0], '=')) {
2556 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2559 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2562 toptarget = NEWSV(0,0);
2563 sv_upgrade(toptarget, SVt_PVFM);
2564 sv_setpvn(toptarget, "", 0);
2565 bodytarget = NEWSV(0,0);
2566 sv_upgrade(bodytarget, SVt_PVFM);
2567 sv_setpvn(bodytarget, "", 0);
2568 formtarget = bodytarget;
2571 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2572 sv_setpv(GvSV(tmpgv),origfilename);
2573 magicname("0", "0", 1);
2575 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2576 sv_setpv(GvSV(tmpgv),origargv[0]);
2577 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2579 (void)gv_AVadd(argvgv);
2580 av_clear(GvAVn(argvgv));
2581 for (; argc > 0; argc--,argv++) {
2582 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2585 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2589 hv_magic(hv, envgv, 'E');
2590 #ifndef VMS /* VMS doesn't have environ array */
2591 /* Note that if the supplied env parameter is actually a copy
2592 of the global environ then it may now point to free'd memory
2593 if the environment has been modified since. To avoid this
2594 problem we treat env==NULL as meaning 'use the default'
2599 environ[0] = Nullch;
2600 for (; *env; env++) {
2601 if (!(s = strchr(*env,'=')))
2604 #if defined(WIN32) || defined(MSDOS)
2607 sv = newSVpv(s--,0);
2608 (void)hv_store(hv, *env, s - *env, sv, 0);
2610 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2611 /* Sins of the RTL. See note in my_setenv(). */
2612 (void)PerlEnv_putenv(savepv(*env));
2616 #ifdef DYNAMIC_ENV_FETCH
2617 HvNAME(hv) = savepv(ENV_HV_NAME);
2621 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2622 sv_setiv(GvSV(tmpgv), (IV)getpid());
2631 s = PerlEnv_getenv("PERL5LIB");
2635 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2637 /* Treat PERL5?LIB as a possible search list logical name -- the
2638 * "natural" VMS idiom for a Unix path string. We allow each
2639 * element to be a set of |-separated directories for compatibility.
2643 if (my_trnlnm("PERL5LIB",buf,0))
2644 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2646 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2650 /* Use the ~-expanded versions of APPLLIB (undocumented),
2651 ARCHLIB PRIVLIB SITEARCH SITELIB and OLDARCHLIB
2654 incpush(APPLLIB_EXP, FALSE);
2658 incpush(ARCHLIB_EXP, FALSE);
2661 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2663 incpush(PRIVLIB_EXP, FALSE);
2666 incpush(SITEARCH_EXP, FALSE);
2669 incpush(SITELIB_EXP, FALSE);
2671 #ifdef OLDARCHLIB_EXP /* 5.00[01] compatibility */
2672 incpush(OLDARCHLIB_EXP, FALSE);
2676 incpush(".", FALSE);
2680 # define PERLLIB_SEP ';'
2683 # define PERLLIB_SEP '|'
2685 # define PERLLIB_SEP ':'
2688 #ifndef PERLLIB_MANGLE
2689 # define PERLLIB_MANGLE(s,n) (s)
2693 incpush(char *p, int addsubdirs)
2695 SV *subdir = Nullsv;
2696 static char *archpat_auto;
2702 subdir = NEWSV(55,0);
2703 if (!archpat_auto) {
2704 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2705 + sizeof("//auto"));
2706 New(55, archpat_auto, len, char);
2707 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2709 for (len = sizeof(ARCHNAME) + 2;
2710 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2711 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2716 /* Break at all separators */
2718 SV *libdir = NEWSV(55,0);
2721 /* skip any consecutive separators */
2722 while ( *p == PERLLIB_SEP ) {
2723 /* Uncomment the next line for PATH semantics */
2724 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2728 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2729 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2734 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2735 p = Nullch; /* break out */
2739 * BEFORE pushing libdir onto @INC we may first push version- and
2740 * archname-specific sub-directories.
2743 struct stat tmpstatbuf;
2748 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2750 while (unix[len-1] == '/') len--; /* Cosmetic */
2751 sv_usepvn(libdir,unix,len);
2754 PerlIO_printf(PerlIO_stderr(),
2755 "Failed to unixify @INC element \"%s\"\n",
2758 /* .../archname/version if -d .../archname/version/auto */
2759 sv_setsv(subdir, libdir);
2760 sv_catpv(subdir, archpat_auto);
2761 if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2762 S_ISDIR(tmpstatbuf.st_mode))
2763 av_push(GvAVn(incgv),
2764 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2766 /* .../archname if -d .../archname/auto */
2767 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2768 strlen(patchlevel) + 1, "", 0);
2769 if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2770 S_ISDIR(tmpstatbuf.st_mode))
2771 av_push(GvAVn(incgv),
2772 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2775 /* finally push this lib directory on the end of @INC */
2776 av_push(GvAVn(incgv), libdir);
2779 SvREFCNT_dec(subdir);
2783 static struct perl_thread *
2786 struct perl_thread *thr;
2789 Newz(53, thr, 1, struct perl_thread);
2790 curcop = &compiling;
2791 thr->cvcache = newHV();
2792 thr->threadsv = newAV();
2793 /* thr->threadsvp is set when find_threadsv is called */
2794 thr->specific = newAV();
2795 thr->errhv = newHV();
2796 thr->flags = THRf_R_JOINABLE;
2797 MUTEX_INIT(&thr->mutex);
2798 /* Handcraft thrsv similarly to mess_sv */
2799 New(53, thrsv, 1, SV);
2800 Newz(53, xpv, 1, XPV);
2801 SvFLAGS(thrsv) = SVt_PV;
2802 SvANY(thrsv) = (void*)xpv;
2803 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2804 SvPVX(thrsv) = (char*)thr;
2805 SvCUR_set(thrsv, sizeof(thr));
2806 SvLEN_set(thrsv, sizeof(thr));
2807 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2809 curcop = &compiling;
2812 MUTEX_LOCK(&threads_mutex);
2817 MUTEX_UNLOCK(&threads_mutex);
2819 #ifdef HAVE_THREAD_INTERN
2820 init_thread_intern(thr);
2823 #ifdef SET_THREAD_SELF
2824 SET_THREAD_SELF(thr);
2826 thr->self = pthread_self();
2827 #endif /* SET_THREAD_SELF */
2831 * These must come after the SET_THR because sv_setpvn does
2832 * SvTAINT and the taint fields require dTHR.
2834 toptarget = NEWSV(0,0);
2835 sv_upgrade(toptarget, SVt_PVFM);
2836 sv_setpvn(toptarget, "", 0);
2837 bodytarget = NEWSV(0,0);
2838 sv_upgrade(bodytarget, SVt_PVFM);
2839 sv_setpvn(bodytarget, "", 0);
2840 formtarget = bodytarget;
2841 thr->errsv = newSVpv("", 0);
2842 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2845 #endif /* USE_THREADS */
2848 call_list(I32 oldscope, AV *list)
2851 line_t oldline = curcop->cop_line;
2856 while (AvFILL(list) >= 0) {
2857 CV *cv = (CV*)av_shift(list);
2866 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2867 (void)SvPV(atsv, len);
2870 curcop = &compiling;
2871 curcop->cop_line = oldline;
2872 if (list == beginav)
2873 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2875 sv_catpv(atsv, "END failed--cleanup aborted");
2876 while (scopestack_ix > oldscope)
2878 croak("%s", SvPVX(atsv));
2886 /* my_exit() was called */
2887 while (scopestack_ix > oldscope)
2890 curstash = defstash;
2892 call_list(oldscope, endav);
2894 curcop = &compiling;
2895 curcop->cop_line = oldline;
2897 if (list == beginav)
2898 croak("BEGIN failed--compilation aborted");
2900 croak("END failed--cleanup aborted");
2906 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2911 curcop = &compiling;
2912 curcop->cop_line = oldline;
2925 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2926 thr, (unsigned long) status));
2927 #endif /* USE_THREADS */
2936 STATUS_NATIVE_SET(status);
2943 my_failure_exit(void)
2946 if (vaxc$errno & 1) {
2947 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2948 STATUS_NATIVE_SET(44);
2951 if (!vaxc$errno && errno) /* unlikely */
2952 STATUS_NATIVE_SET(44);
2954 STATUS_NATIVE_SET(vaxc$errno);
2958 STATUS_POSIX_SET(errno);
2959 else if (STATUS_POSIX == 0)
2960 STATUS_POSIX_SET(255);
2969 register PERL_CONTEXT *cx;
2978 (void)UNLINK(e_tmpname);
2979 Safefree(e_tmpname);
2983 if (cxstack_ix >= 0) {