3 * Copyright (c) 1987-1997 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 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 = 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)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 = 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 ( 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)
904 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
905 DEBUG_L(signal(SIGSEGV, (void(*)(int))catch_sigsegv););
908 init_predump_symbols();
910 init_postdump_symbols(argc,argv,env);
914 /* now parse the script */
917 if (yyparse() || error_count) {
919 croak("%s had compilation errors.\n", origfilename);
921 croak("Execution of %s aborted due to compilation errors.\n",
925 curcop->cop_line = 0;
929 (void)UNLINK(e_tmpname);
934 /* now that script is parsed, we can modify record separator */
936 rs = SvREFCNT_inc(nrs);
938 sv_setsv(*av_fetch(thr->threadsv, find_threadsv("/"), FALSE), rs);
940 sv_setsv(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), rs);
941 #endif /* USE_THREADS */
952 if ((s=getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
953 dump_mstats("after compilation:");
963 perl_run(PerlInterpreter *sv_interp)
970 if (!(curinterp = sv_interp))
973 oldscope = scopestack_ix;
978 cxstack_ix = -1; /* start context stack again */
981 /* my_exit() was called */
982 while (scopestack_ix > oldscope)
987 call_list(oldscope, endav);
989 if (getenv("PERL_DEBUG_MSTATS"))
990 dump_mstats("after execution: ");
993 return STATUS_NATIVE_EXPORT;
996 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1001 if (curstack != mainstack) {
1003 SWITCHSTACK(curstack, mainstack);
1008 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1009 sawampersand ? "Enabling" : "Omitting"));
1012 DEBUG_x(dump_all());
1013 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1015 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1016 (unsigned long) thr));
1017 #endif /* USE_THREADS */
1020 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1023 if (PERLDB_SINGLE && DBsingle)
1024 sv_setiv(DBsingle, 1);
1026 call_list(oldscope, initav);
1036 else if (main_start) {
1037 CvDEPTH(main_cv) = 1;
1048 perl_get_sv(char *name, I32 create)
1052 if (name[1] == '\0' && !isALPHA(name[0])) {
1053 PADOFFSET tmp = find_threadsv(name);
1054 if (tmp != NOT_IN_PAD) {
1056 return *av_fetch(thr->threadsv, tmp, FALSE);
1059 #endif /* USE_THREADS */
1060 gv = gv_fetchpv(name, create, SVt_PV);
1067 perl_get_av(char *name, I32 create)
1069 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1078 perl_get_hv(char *name, I32 create)
1080 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1089 perl_get_cv(char *name, I32 create)
1091 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1092 if (create && !GvCVu(gv))
1093 return newSUB(start_subparse(FALSE, 0),
1094 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1102 /* Be sure to refetch the stack pointer after calling these routines. */
1105 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1107 /* See G_* flags in cop.h */
1108 /* null terminated arg list */
1115 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1120 return perl_call_pv(sub_name, flags);
1124 perl_call_pv(char *sub_name, I32 flags)
1125 /* name of the subroutine */
1126 /* See G_* flags in cop.h */
1128 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1132 perl_call_method(char *methname, I32 flags)
1133 /* name of the subroutine */
1134 /* See G_* flags in cop.h */
1140 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1143 return perl_call_sv(*stack_sp--, flags);
1146 /* May be called with any of a CV, a GV, or an SV containing the name. */
1148 perl_call_sv(SV *sv, I32 flags)
1150 /* See G_* flags in cop.h */
1153 LOGOP myop; /* fake syntax tree node */
1159 bool oldcatch = CATCH_GET;
1164 if (flags & G_DISCARD) {
1169 Zero(&myop, 1, LOGOP);
1170 myop.op_next = Nullop;
1171 if (!(flags & G_NOARGS))
1172 myop.op_flags |= OPf_STACKED;
1173 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1174 (flags & G_ARRAY) ? OPf_WANT_LIST :
1179 EXTEND(stack_sp, 1);
1182 oldscope = scopestack_ix;
1184 if (PERLDB_SUB && curstash != debstash
1185 /* Handle first BEGIN of -d. */
1186 && (DBcv || (DBcv = GvCV(DBsub)))
1187 /* Try harder, since this may have been a sighandler, thus
1188 * curstash may be meaningless. */
1189 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash))
1190 op->op_private |= OPpENTERSUB_DB;
1192 if (flags & G_EVAL) {
1193 cLOGOP->op_other = op;
1195 /* we're trying to emulate pp_entertry() here */
1197 register PERL_CONTEXT *cx;
1198 I32 gimme = GIMME_V;
1203 push_return(op->op_next);
1204 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1206 eval_root = op; /* Only needed so that goto works right. */
1209 if (flags & G_KEEPERR)
1224 /* my_exit() was called */
1225 curstash = defstash;
1229 croak("Callback called exit");
1238 stack_sp = stack_base + oldmark;
1239 if (flags & G_ARRAY)
1243 *++stack_sp = &sv_undef;
1251 if (op == (OP*)&myop)
1252 op = pp_entersub(ARGS);
1255 retval = stack_sp - (stack_base + oldmark);
1256 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1260 if (flags & G_EVAL) {
1261 if (scopestack_ix > oldscope) {
1265 register PERL_CONTEXT *cx;
1277 CATCH_SET(oldcatch);
1279 if (flags & G_DISCARD) {
1280 stack_sp = stack_base + oldmark;
1289 /* Eval a string. The G_EVAL flag is always assumed. */
1292 perl_eval_sv(SV *sv, I32 flags)
1294 /* See G_* flags in cop.h */
1297 UNOP myop; /* fake syntax tree node */
1299 I32 oldmark = sp - stack_base;
1306 if (flags & G_DISCARD) {
1314 EXTEND(stack_sp, 1);
1316 oldscope = scopestack_ix;
1318 if (!(flags & G_NOARGS))
1319 myop.op_flags = OPf_STACKED;
1320 myop.op_next = Nullop;
1321 myop.op_type = OP_ENTEREVAL;
1322 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1323 (flags & G_ARRAY) ? OPf_WANT_LIST :
1325 if (flags & G_KEEPERR)
1326 myop.op_flags |= OPf_SPECIAL;
1336 /* my_exit() was called */
1337 curstash = defstash;
1341 croak("Callback called exit");
1350 stack_sp = stack_base + oldmark;
1351 if (flags & G_ARRAY)
1355 *++stack_sp = &sv_undef;
1360 if (op == (OP*)&myop)
1361 op = pp_entereval(ARGS);
1364 retval = stack_sp - (stack_base + oldmark);
1365 if (!(flags & G_KEEPERR))
1370 if (flags & G_DISCARD) {
1371 stack_sp = stack_base + oldmark;
1381 perl_eval_pv(char *p, I32 croak_on_error)
1384 SV* sv = newSVpv(p, 0);
1387 perl_eval_sv(sv, G_SCALAR);
1394 if (croak_on_error && SvTRUE(ERRSV))
1395 croak(SvPVx(ERRSV, na));
1400 /* Require a module. */
1403 perl_require_pv(char *pv)
1405 SV* sv = sv_newmortal();
1406 sv_setpv(sv, "require '");
1409 perl_eval_sv(sv, G_DISCARD);
1413 magicname(char *sym, char *name, I32 namlen)
1417 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1418 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1422 usage(char *name) /* XXX move this out into a module ? */
1425 /* This message really ought to be max 23 lines.
1426 * Removed -h because the user already knows that opton. Others? */
1428 static char *usage[] = {
1429 "-0[octal] specify record separator (\\0, if no argument)",
1430 "-a autosplit mode with -n or -p (splits $_ into @F)",
1431 "-c check syntax only (runs BEGIN and END blocks)",
1432 "-d[:debugger] run scripts under debugger",
1433 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1434 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1435 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1436 "-i[extension] edit <> files in place (make backup if extension supplied)",
1437 "-Idirectory specify @INC/#include directory (may be used more than once)",
1438 "-l[octal] enable line ending processing, specifies line terminator",
1439 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1440 "-n assume 'while (<>) { ... }' loop around your script",
1441 "-p assume loop like -n but print line also like sed",
1442 "-P run script through C preprocessor before compilation",
1443 "-s enable some switch parsing for switches after script name",
1444 "-S look for the script using PATH environment variable",
1445 "-T turn on tainting checks",
1446 "-u dump core after parsing script",
1447 "-U allow unsafe operations",
1448 "-v print version number and patchlevel of perl",
1449 "-V[:variable] print perl configuration information",
1450 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1451 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1457 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1459 printf("\n %s", *p++);
1462 /* This routine handles any switches that can be given during run */
1465 moreswitches(char *s)
1474 rschar = scan_oct(s, 4, &numlen);
1476 if (rschar & ~((U8)~0))
1478 else if (!rschar && numlen >= 2)
1479 nrs = newSVpv("", 0);
1482 nrs = newSVpv(&ch, 1);
1488 splitstr = savepv(s + 1);
1502 if (*s == ':' || *s == '=') {
1503 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1507 perldb = PERLDB_ALL;
1514 if (isALPHA(s[1])) {
1515 static char debopts[] = "psltocPmfrxuLHXD";
1518 for (s++; *s && (d = strchr(debopts,*s)); s++)
1519 debug |= 1 << (d - debopts);
1523 for (s++; isDIGIT(*s); s++) ;
1525 debug |= 0x80000000;
1527 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1528 for (s++; isALNUM(*s); s++) ;
1538 inplace = savepv(s+1);
1540 for (s = inplace; *s && !isSPACE(*s); s++) ;
1544 case 'I': /* -I handled both here and in parse_perl() */
1547 while (*s && isSPACE(*s))
1551 for (e = s; *e && !isSPACE(*e); e++) ;
1552 p = savepvn(s, e-s);
1558 croak("No space allowed after -I");
1568 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1578 ors = SvPV(nrs, orslen);
1579 ors = savepvn(ors, orslen);
1583 forbid_setid("-M"); /* XXX ? */
1586 forbid_setid("-m"); /* XXX ? */
1591 /* -M-foo == 'no foo' */
1592 if (*s == '-') { use = "no "; ++s; }
1593 sv = newSVpv(use,0);
1595 /* We allow -M'Module qw(Foo Bar)' */
1596 while(isALNUM(*s) || *s==':') ++s;
1598 sv_catpv(sv, start);
1599 if (*(start-1) == 'm') {
1601 croak("Can't use '%c' after -mname", *s);
1602 sv_catpv( sv, " ()");
1605 sv_catpvn(sv, start, s-start);
1606 sv_catpv(sv, " split(/,/,q{");
1611 if (preambleav == NULL)
1612 preambleav = newAV();
1613 av_push(preambleav, sv);
1616 croak("No space allowed after -%c", *(s-1));
1633 croak("Too late for \"-T\" option");
1645 #if defined(SUBVERSION) && SUBVERSION > 0
1646 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1647 PATCHLEVEL, SUBVERSION, ARCHNAME);
1649 printf("\nThis is perl, version %s built for %s",
1650 patchlevel, ARCHNAME);
1652 #if defined(LOCAL_PATCH_COUNT)
1653 if (LOCAL_PATCH_COUNT > 0)
1654 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1655 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1658 printf("\n\nCopyright 1987-1997, Larry Wall\n");
1660 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1663 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1666 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1667 "Version 5 port Copyright (c) 1994-1997, Andreas Kaiser, Ilya Zakharevich\n");
1670 printf("atariST series port, ++jrb bammi@cadence.com\n");
1673 Perl may be copied only under the terms of either the Artistic License or the\n\
1674 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n");
1682 if (s[1] == '-') /* Additional switches on #! line. */
1693 #ifdef ALTERNATE_SHEBANG
1694 case 'S': /* OS/2 needs -S on "extproc" line. */
1702 croak("Can't emulate -%.1s on #! line",s);
1707 /* compliments of Tom Christiansen */
1709 /* unexec() can be found in the Gnu emacs distribution */
1720 prog = newSVpv(BIN_EXP);
1721 sv_catpv(prog, "/perl");
1722 file = newSVpv(origfilename);
1723 sv_catpv(file, ".perldump");
1725 status = unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1727 PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n",
1728 SvPVX(prog), SvPVX(file));
1732 # include <lib$routines.h>
1733 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1735 ABORT(); /* for use with undump */
1741 init_main_stash(void)
1746 /* Note that strtab is a rather special HV. Assumptions are made
1747 about not iterating on it, and not adding tie magic to it.
1748 It is properly deallocated in perl_destruct() */
1750 HvSHAREKEYS_off(strtab); /* mandatory */
1751 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1752 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1754 curstash = defstash = newHV();
1755 curstname = newSVpv("main",4);
1756 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1757 SvREFCNT_dec(GvHV(gv));
1758 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1760 HvNAME(defstash) = savepv("main");
1761 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1763 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1764 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1766 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1767 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1768 sv_setpvn(ERRSV, "", 0);
1769 curstash = defstash;
1770 compiling.cop_stash = defstash;
1771 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1772 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1773 /* We must init $/ before switches are processed. */
1774 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1777 #ifdef CAN_PROTOTYPE
1779 open_script(char *scriptname, bool dosearch, SV *sv)
1782 open_script(scriptname,dosearch,sv)
1789 char *xfound = Nullch;
1790 char *xfailed = Nullch;
1794 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
1795 # define SEARCH_EXTS ".bat", ".cmd", NULL
1796 # define MAX_EXT_LEN 4
1799 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
1800 # define MAX_EXT_LEN 4
1803 # define SEARCH_EXTS ".pl", ".com", NULL
1804 # define MAX_EXT_LEN 4
1806 /* additional extensions to try in each dir if scriptname not found */
1808 char *ext[] = { SEARCH_EXTS };
1809 int extidx = 0, i = 0;
1810 char *curext = Nullch;
1812 # define MAX_EXT_LEN 0
1816 * If dosearch is true and if scriptname does not contain path
1817 * delimiters, search the PATH for scriptname.
1819 * If SEARCH_EXTS is also defined, will look for each
1820 * scriptname{SEARCH_EXTS} whenever scriptname is not found
1821 * while searching the PATH.
1823 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
1824 * proceeds as follows:
1826 * + look for ./scriptname{,.foo,.bar}
1827 * + search the PATH for scriptname{,.foo,.bar}
1830 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
1831 * this will not look in '.' if it's not in the PATH)
1836 int hasdir, idx = 0, deftypes = 1;
1839 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
1840 /* The first time through, just add SEARCH_EXTS to whatever we
1841 * already have, so we can check for default file types. */
1843 (!hasdir && my_trnlnm("DCL$PATH",tokenbuf,idx++)) )
1849 if ((strlen(tokenbuf) + strlen(scriptname)
1850 + MAX_EXT_LEN) >= sizeof tokenbuf)
1851 continue; /* don't search dir with too-long name */
1852 strcat(tokenbuf, scriptname);
1856 if (strEQ(scriptname, "-"))
1858 if (dosearch) { /* Look in '.' first. */
1859 char *cur = scriptname;
1861 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
1863 if (strEQ(ext[i++],curext)) {
1864 extidx = -1; /* already has an ext */
1869 DEBUG_p(PerlIO_printf(Perl_debug_log,
1870 "Looking for %s\n",cur));
1871 if (Stat(cur,&statbuf) >= 0) {
1879 if (cur == scriptname) {
1880 len = strlen(scriptname);
1881 if (len+MAX_EXT_LEN+1 >= sizeof(tokenbuf))
1883 cur = strcpy(tokenbuf, scriptname);
1885 } while (extidx >= 0 && ext[extidx] /* try an extension? */
1886 && strcpy(tokenbuf+len, ext[extidx++]));
1891 if (dosearch && !strchr(scriptname, '/')
1893 && !strchr(scriptname, '\\')
1895 && (s = getenv("PATH"))) {
1898 bufend = s + strlen(s);
1899 while (s < bufend) {
1900 #if defined(atarist) || defined(DOSISH)
1905 && *s != ';'; len++, s++) {
1906 if (len < sizeof tokenbuf)
1909 if (len < sizeof tokenbuf)
1910 tokenbuf[len] = '\0';
1911 #else /* ! (atarist || DOSISH) */
1912 s = delimcpy(tokenbuf, tokenbuf + sizeof tokenbuf, s, bufend,
1915 #endif /* ! (atarist || DOSISH) */
1918 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tokenbuf)
1919 continue; /* don't search dir with too-long name */
1921 #if defined(atarist) || defined(DOSISH)
1922 && tokenbuf[len - 1] != '/'
1923 && tokenbuf[len - 1] != '\\'
1926 tokenbuf[len++] = '/';
1927 if (len == 2 && tokenbuf[0] == '.')
1929 (void)strcpy(tokenbuf + len, scriptname);
1933 len = strlen(tokenbuf);
1934 if (extidx > 0) /* reset after previous loop */
1938 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tokenbuf));
1939 retval = Stat(tokenbuf,&statbuf);
1941 } while ( retval < 0 /* not there */
1942 && extidx>=0 && ext[extidx] /* try an extension? */
1943 && strcpy(tokenbuf+len, ext[extidx++])
1948 if (S_ISREG(statbuf.st_mode)
1949 && cando(S_IRUSR,TRUE,&statbuf)
1951 && cando(S_IXUSR,TRUE,&statbuf)
1955 xfound = tokenbuf; /* bingo! */
1959 xfailed = savepv(tokenbuf);
1962 if (!xfound && !seen_dot && !xfailed && (Stat(scriptname,&statbuf) < 0))
1964 seen_dot = 1; /* Disable message. */
1966 croak("Can't %s %s%s%s",
1967 (xfailed ? "execute" : "find"),
1968 (xfailed ? xfailed : scriptname),
1969 (xfailed ? "" : " on PATH"),
1970 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
1973 scriptname = xfound;
1976 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
1977 char *s = scriptname + 8;
1986 origfilename = savepv(e_tmpname ? "-e" : scriptname);
1987 curcop->cop_filegv = gv_fetchfile(origfilename);
1988 if (strEQ(origfilename,"-"))
1990 if (fdscript >= 0) {
1991 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
1992 #if defined(HAS_FCNTL) && defined(F_SETFD)
1994 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
1997 else if (preprocess) {
1998 char *cpp_cfg = CPPSTDIN;
1999 SV *cpp = NEWSV(0,0);
2000 SV *cmd = NEWSV(0,0);
2002 if (strEQ(cpp_cfg, "cppstdin"))
2003 sv_catpvf(cpp, "%s/", BIN_EXP);
2004 sv_catpv(cpp, cpp_cfg);
2007 sv_catpv(sv,PRIVLIB_EXP);
2011 sed %s -e \"/^[^#]/b\" \
2012 -e \"/^#[ ]*include[ ]/b\" \
2013 -e \"/^#[ ]*define[ ]/b\" \
2014 -e \"/^#[ ]*if[ ]/b\" \
2015 -e \"/^#[ ]*ifdef[ ]/b\" \
2016 -e \"/^#[ ]*ifndef[ ]/b\" \
2017 -e \"/^#[ ]*else/b\" \
2018 -e \"/^#[ ]*elif[ ]/b\" \
2019 -e \"/^#[ ]*undef[ ]/b\" \
2020 -e \"/^#[ ]*endif/b\" \
2023 (doextract ? "-e \"1,/^#/d\n\"" : ""),
2026 %s %s -e '/^[^#]/b' \
2027 -e '/^#[ ]*include[ ]/b' \
2028 -e '/^#[ ]*define[ ]/b' \
2029 -e '/^#[ ]*if[ ]/b' \
2030 -e '/^#[ ]*ifdef[ ]/b' \
2031 -e '/^#[ ]*ifndef[ ]/b' \
2032 -e '/^#[ ]*else/b' \
2033 -e '/^#[ ]*elif[ ]/b' \
2034 -e '/^#[ ]*undef[ ]/b' \
2035 -e '/^#[ ]*endif/b' \
2043 (doextract ? "-e '1,/^#/d\n'" : ""),
2045 scriptname, cpp, sv, CPPMINUS);
2047 #ifdef IAMSUID /* actually, this is caught earlier */
2048 if (euid != uid && !euid) { /* if running suidperl */
2050 (void)seteuid(uid); /* musn't stay setuid root */
2053 (void)setreuid((Uid_t)-1, uid);
2055 #ifdef HAS_SETRESUID
2056 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
2062 if (geteuid() != uid)
2063 croak("Can't do seteuid!\n");
2065 #endif /* IAMSUID */
2066 rsfp = my_popen(SvPVX(cmd), "r");
2070 else if (!*scriptname) {
2071 forbid_setid("program input from stdin");
2072 rsfp = PerlIO_stdin();
2075 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2076 #if defined(HAS_FCNTL) && defined(F_SETFD)
2078 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2086 #ifndef IAMSUID /* in case script is not readable before setuid */
2087 if (euid && Stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2088 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2090 execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2091 croak("Can't do setuid\n");
2095 croak("Can't open perl script \"%s\": %s\n",
2096 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2101 validate_suid(char *validarg, char *scriptname)
2105 /* do we need to emulate setuid on scripts? */
2107 /* This code is for those BSD systems that have setuid #! scripts disabled
2108 * in the kernel because of a security problem. Merely defining DOSUID
2109 * in perl will not fix that problem, but if you have disabled setuid
2110 * scripts in the kernel, this will attempt to emulate setuid and setgid
2111 * on scripts that have those now-otherwise-useless bits set. The setuid
2112 * root version must be called suidperl or sperlN.NNN. If regular perl
2113 * discovers that it has opened a setuid script, it calls suidperl with
2114 * the same argv that it had. If suidperl finds that the script it has
2115 * just opened is NOT setuid root, it sets the effective uid back to the
2116 * uid. We don't just make perl setuid root because that loses the
2117 * effective uid we had before invoking perl, if it was different from the
2120 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2121 * be defined in suidperl only. suidperl must be setuid root. The
2122 * Configure script will set this up for you if you want it.
2129 if (Fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2130 croak("Can't stat script \"%s\"",origfilename);
2131 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2135 #ifndef HAS_SETREUID
2136 /* On this access check to make sure the directories are readable,
2137 * there is actually a small window that the user could use to make
2138 * filename point to an accessible directory. So there is a faint
2139 * chance that someone could execute a setuid script down in a
2140 * non-accessible directory. I don't know what to do about that.
2141 * But I don't think it's too important. The manual lies when
2142 * it says access() is useful in setuid programs.
2144 if (access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2145 croak("Permission denied");
2147 /* If we can swap euid and uid, then we can determine access rights
2148 * with a simple stat of the file, and then compare device and
2149 * inode to make sure we did stat() on the same file we opened.
2150 * Then we just have to make sure he or she can execute it.
2153 struct stat tmpstatbuf;
2157 setreuid(euid,uid) < 0
2160 setresuid(euid,uid,(Uid_t)-1) < 0
2163 || getuid() != euid || geteuid() != uid)
2164 croak("Can't swap uid and euid"); /* really paranoid */
2165 if (Stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2166 croak("Permission denied"); /* testing full pathname here */
2167 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2168 tmpstatbuf.st_ino != statbuf.st_ino) {
2169 (void)PerlIO_close(rsfp);
2170 if (rsfp = my_popen("/bin/mail root","w")) { /* heh, heh */
2172 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2173 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2174 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2175 (long)statbuf.st_dev, (long)statbuf.st_ino,
2176 SvPVX(GvSV(curcop->cop_filegv)),
2177 (long)statbuf.st_uid, (long)statbuf.st_gid);
2178 (void)my_pclose(rsfp);
2180 croak("Permission denied\n");
2184 setreuid(uid,euid) < 0
2186 # if defined(HAS_SETRESUID)
2187 setresuid(uid,euid,(Uid_t)-1) < 0
2190 || getuid() != uid || geteuid() != euid)
2191 croak("Can't reswap uid and euid");
2192 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2193 croak("Permission denied\n");
2195 #endif /* HAS_SETREUID */
2196 #endif /* IAMSUID */
2198 if (!S_ISREG(statbuf.st_mode))
2199 croak("Permission denied");
2200 if (statbuf.st_mode & S_IWOTH)
2201 croak("Setuid/gid script is writable by world");
2202 doswitches = FALSE; /* -s is insecure in suid */
2204 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2205 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2206 croak("No #! line");
2207 s = SvPV(linestr,na)+2;
2209 while (!isSPACE(*s)) s++;
2210 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2211 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2212 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2213 croak("Not a perl script");
2214 while (*s == ' ' || *s == '\t') s++;
2216 * #! arg must be what we saw above. They can invoke it by
2217 * mentioning suidperl explicitly, but they may not add any strange
2218 * arguments beyond what #! says if they do invoke suidperl that way.
2220 len = strlen(validarg);
2221 if (strEQ(validarg," PHOOEY ") ||
2222 strnNE(s,validarg,len) || !isSPACE(s[len]))
2223 croak("Args must match #! line");
2226 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2227 euid == statbuf.st_uid)
2229 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2230 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2231 #endif /* IAMSUID */
2233 if (euid) { /* oops, we're not the setuid root perl */
2234 (void)PerlIO_close(rsfp);
2237 execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2239 croak("Can't do setuid\n");
2242 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2244 (void)setegid(statbuf.st_gid);
2247 (void)setregid((Gid_t)-1,statbuf.st_gid);
2249 #ifdef HAS_SETRESGID
2250 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2252 setgid(statbuf.st_gid);
2256 if (getegid() != statbuf.st_gid)
2257 croak("Can't do setegid!\n");
2259 if (statbuf.st_mode & S_ISUID) {
2260 if (statbuf.st_uid != euid)
2262 (void)seteuid(statbuf.st_uid); /* all that for this */
2265 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2267 #ifdef HAS_SETRESUID
2268 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2270 setuid(statbuf.st_uid);
2274 if (geteuid() != statbuf.st_uid)
2275 croak("Can't do seteuid!\n");
2277 else if (uid) { /* oops, mustn't run as root */
2279 (void)seteuid((Uid_t)uid);
2282 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2284 #ifdef HAS_SETRESUID
2285 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2291 if (geteuid() != uid)
2292 croak("Can't do seteuid!\n");
2295 if (!cando(S_IXUSR,TRUE,&statbuf))
2296 croak("Permission denied\n"); /* they can't do this */
2299 else if (preprocess)
2300 croak("-P not allowed for setuid/setgid script\n");
2301 else if (fdscript >= 0)
2302 croak("fd script not allowed in suidperl\n");
2304 croak("Script is not setuid/setgid in suidperl\n");
2306 /* We absolutely must clear out any saved ids here, so we */
2307 /* exec the real perl, substituting fd script for scriptname. */
2308 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2309 PerlIO_rewind(rsfp);
2310 lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2311 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2312 if (!origargv[which])
2313 croak("Permission denied");
2314 origargv[which] = savepv(form("/dev/fd/%d/%s",
2315 PerlIO_fileno(rsfp), origargv[which]));
2316 #if defined(HAS_FCNTL) && defined(F_SETFD)
2317 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2319 execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2320 croak("Can't do setuid\n");
2321 #endif /* IAMSUID */
2323 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2324 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2326 Fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2327 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2329 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2332 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2333 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2334 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2335 /* not set-id, must be wrapped */
2341 find_beginning(void)
2343 register char *s, *s2;
2345 /* skip forward in input to the real script? */
2349 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2350 croak("No Perl script found in input\n");
2351 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2352 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2354 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2356 while (*s == ' ' || *s == '\t') s++;
2358 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2359 if (strnEQ(s2-4,"perl",4))
2361 while (s = moreswitches(s)) ;
2363 if (cddir && chdir(cddir) < 0)
2364 croak("Can't chdir to %s",cddir);
2372 uid = (int)getuid();
2373 euid = (int)geteuid();
2374 gid = (int)getgid();
2375 egid = (int)getegid();
2380 tainting |= (uid && (euid != uid || egid != gid));
2384 forbid_setid(char *s)
2387 croak("No %s allowed while running setuid", s);
2389 croak("No %s allowed while running setgid", s);
2396 curstash = debstash;
2397 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2399 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2400 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2401 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2402 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2403 sv_setiv(DBsingle, 0);
2404 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2405 sv_setiv(DBtrace, 0);
2406 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2407 sv_setiv(DBsignal, 0);
2408 curstash = defstash;
2412 init_stacks(ARGSproto)
2415 mainstack = curstack; /* remember in case we switch stacks */
2416 AvREAL_off(curstack); /* not a real array */
2417 av_extend(curstack,127);
2419 stack_base = AvARRAY(curstack);
2420 stack_sp = stack_base;
2421 stack_max = stack_base + 127;
2423 cxstack_max = 8192 / sizeof(PERL_CONTEXT) - 2; /* Use most of 8K. */
2424 New(50,cxstack,cxstack_max + 1,PERL_CONTEXT);
2427 New(50,tmps_stack,128,SV*);
2433 * The following stacks almost certainly should be per-interpreter,
2434 * but for now they're not. XXX
2438 markstack_ptr = markstack;
2440 New(54,markstack,64,I32);
2441 markstack_ptr = markstack;
2442 markstack_max = markstack + 64;
2448 New(54,scopestack,32,I32);
2450 scopestack_max = 32;
2456 New(54,savestack,128,ANY);
2458 savestack_max = 128;
2464 New(54,retstack,16,OP*);
2475 Safefree(tmps_stack);
2482 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2491 subname = newSVpv("main",4);
2495 init_predump_symbols(void)
2502 sv_setpvn(*av_fetch(thr->threadsv,find_threadsv("\""),FALSE)," ", 1);
2504 sv_setpvn(GvSV(gv_fetchpv("\"", TRUE, SVt_PV)), " ", 1);
2505 #endif /* USE_THREADS */
2507 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2508 GvMULTI_on(stdingv);
2509 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2510 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2512 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2514 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2516 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2518 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2520 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2522 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2523 GvMULTI_on(othergv);
2524 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2525 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2527 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2529 statname = NEWSV(66,0); /* last filename we did stat on */
2532 osname = savepv(OSNAME);
2536 init_postdump_symbols(register int argc, register char **argv, register char **env)
2543 argc--,argv++; /* skip name of script */
2545 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2548 if (argv[0][1] == '-') {
2552 if (s = strchr(argv[0], '=')) {
2554 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2557 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2560 toptarget = NEWSV(0,0);
2561 sv_upgrade(toptarget, SVt_PVFM);
2562 sv_setpvn(toptarget, "", 0);
2563 bodytarget = NEWSV(0,0);
2564 sv_upgrade(bodytarget, SVt_PVFM);
2565 sv_setpvn(bodytarget, "", 0);
2566 formtarget = bodytarget;
2569 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2570 sv_setpv(GvSV(tmpgv),origfilename);
2571 magicname("0", "0", 1);
2573 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2574 sv_setpv(GvSV(tmpgv),origargv[0]);
2575 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2577 (void)gv_AVadd(argvgv);
2578 av_clear(GvAVn(argvgv));
2579 for (; argc > 0; argc--,argv++) {
2580 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2583 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2587 hv_magic(hv, envgv, 'E');
2588 #ifndef VMS /* VMS doesn't have environ array */
2589 /* Note that if the supplied env parameter is actually a copy
2590 of the global environ then it may now point to free'd memory
2591 if the environment has been modified since. To avoid this
2592 problem we treat env==NULL as meaning 'use the default'
2597 environ[0] = Nullch;
2598 for (; *env; env++) {
2599 if (!(s = strchr(*env,'=')))
2605 sv = newSVpv(s--,0);
2606 (void)hv_store(hv, *env, s - *env, sv, 0);
2608 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2609 /* Sins of the RTL. See note in my_setenv(). */
2610 (void)putenv(savepv(*env));
2614 #ifdef DYNAMIC_ENV_FETCH
2615 HvNAME(hv) = savepv(ENV_HV_NAME);
2619 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2620 sv_setiv(GvSV(tmpgv), (IV)getpid());
2629 s = getenv("PERL5LIB");
2633 incpush(getenv("PERLLIB"), FALSE);
2635 /* Treat PERL5?LIB as a possible search list logical name -- the
2636 * "natural" VMS idiom for a Unix path string. We allow each
2637 * element to be a set of |-separated directories for compatibility.
2641 if (my_trnlnm("PERL5LIB",buf,0))
2642 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2644 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2648 /* Use the ~-expanded versions of APPLLIB (undocumented),
2649 ARCHLIB PRIVLIB SITEARCH SITELIB and OLDARCHLIB
2652 incpush(APPLLIB_EXP, FALSE);
2656 incpush(ARCHLIB_EXP, FALSE);
2659 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2661 incpush(PRIVLIB_EXP, FALSE);
2664 incpush(SITEARCH_EXP, FALSE);
2667 incpush(SITELIB_EXP, FALSE);
2669 #ifdef OLDARCHLIB_EXP /* 5.00[01] compatibility */
2670 incpush(OLDARCHLIB_EXP, FALSE);
2674 incpush(".", FALSE);
2678 # define PERLLIB_SEP ';'
2681 # define PERLLIB_SEP '|'
2683 # define PERLLIB_SEP ':'
2686 #ifndef PERLLIB_MANGLE
2687 # define PERLLIB_MANGLE(s,n) (s)
2691 incpush(char *p, int addsubdirs)
2693 SV *subdir = Nullsv;
2694 static char *archpat_auto;
2701 if (!archpat_auto) {
2702 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2703 + sizeof("//auto"));
2704 New(55, archpat_auto, len, char);
2705 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2707 for (len = sizeof(ARCHNAME) + 2;
2708 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2709 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2714 /* Break at all separators */
2716 SV *libdir = newSV(0);
2719 /* skip any consecutive separators */
2720 while ( *p == PERLLIB_SEP ) {
2721 /* Uncomment the next line for PATH semantics */
2722 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2726 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2727 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2732 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2733 p = Nullch; /* break out */
2737 * BEFORE pushing libdir onto @INC we may first push version- and
2738 * archname-specific sub-directories.
2741 struct stat tmpstatbuf;
2746 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2748 while (unix[len-1] == '/') len--; /* Cosmetic */
2749 sv_usepvn(libdir,unix,len);
2752 PerlIO_printf(PerlIO_stderr(),
2753 "Failed to unixify @INC element \"%s\"\n",
2756 /* .../archname/version if -d .../archname/version/auto */
2757 sv_setsv(subdir, libdir);
2758 sv_catpv(subdir, archpat_auto);
2759 if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2760 S_ISDIR(tmpstatbuf.st_mode))
2761 av_push(GvAVn(incgv),
2762 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2764 /* .../archname if -d .../archname/auto */
2765 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2766 strlen(patchlevel) + 1, "", 0);
2767 if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2768 S_ISDIR(tmpstatbuf.st_mode))
2769 av_push(GvAVn(incgv),
2770 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2773 /* finally push this lib directory on the end of @INC */
2774 av_push(GvAVn(incgv), libdir);
2777 SvREFCNT_dec(subdir);
2781 static struct perl_thread *
2784 struct perl_thread *thr;
2787 Newz(53, thr, 1, struct perl_thread);
2788 curcop = &compiling;
2789 thr->cvcache = newHV();
2790 thr->threadsv = newAV();
2791 thr->specific = newAV();
2792 thr->errhv = newHV();
2793 thr->flags = THRf_R_JOINABLE;
2794 MUTEX_INIT(&thr->mutex);
2795 /* Handcraft thrsv similarly to mess_sv */
2796 New(53, thrsv, 1, SV);
2797 Newz(53, xpv, 1, XPV);
2798 SvFLAGS(thrsv) = SVt_PV;
2799 SvANY(thrsv) = (void*)xpv;
2800 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2801 SvPVX(thrsv) = (char*)thr;
2802 SvCUR_set(thrsv, sizeof(thr));
2803 SvLEN_set(thrsv, sizeof(thr));
2804 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2806 curcop = &compiling;
2809 MUTEX_LOCK(&threads_mutex);
2814 MUTEX_UNLOCK(&threads_mutex);
2816 #ifdef HAVE_THREAD_INTERN
2817 init_thread_intern(thr);
2820 #ifdef SET_THREAD_SELF
2821 SET_THREAD_SELF(thr);
2823 thr->self = pthread_self();
2824 #endif /* SET_THREAD_SELF */
2828 * These must come after the SET_THR because sv_setpvn does
2829 * SvTAINT and the taint fields require dTHR.
2831 toptarget = NEWSV(0,0);
2832 sv_upgrade(toptarget, SVt_PVFM);
2833 sv_setpvn(toptarget, "", 0);
2834 bodytarget = NEWSV(0,0);
2835 sv_upgrade(bodytarget, SVt_PVFM);
2836 sv_setpvn(bodytarget, "", 0);
2837 formtarget = bodytarget;
2838 thr->errsv = newSVpv("", 0);
2841 #endif /* USE_THREADS */
2844 call_list(I32 oldscope, AV *list)
2847 line_t oldline = curcop->cop_line;
2852 while (AvFILL(list) >= 0) {
2853 CV *cv = (CV*)av_shift(list);
2862 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2863 (void)SvPV(atsv, len);
2866 curcop = &compiling;
2867 curcop->cop_line = oldline;
2868 if (list == beginav)
2869 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2871 sv_catpv(atsv, "END failed--cleanup aborted");
2872 while (scopestack_ix > oldscope)
2874 croak("%s", SvPVX(atsv));
2882 /* my_exit() was called */
2883 while (scopestack_ix > oldscope)
2886 curstash = defstash;
2888 call_list(oldscope, endav);
2890 curcop = &compiling;
2891 curcop->cop_line = oldline;
2893 if (list == beginav)
2894 croak("BEGIN failed--compilation aborted");
2896 croak("END failed--cleanup aborted");
2902 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2907 curcop = &compiling;
2908 curcop->cop_line = oldline;
2921 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2922 thr, (unsigned long) status));
2923 #endif /* USE_THREADS */
2932 STATUS_NATIVE_SET(status);
2939 my_failure_exit(void)
2942 if (vaxc$errno & 1) {
2943 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2944 STATUS_NATIVE_SET(44);
2947 if (!vaxc$errno && errno) /* unlikely */
2948 STATUS_NATIVE_SET(44);
2950 STATUS_NATIVE_SET(vaxc$errno);
2954 STATUS_POSIX_SET(errno);
2955 else if (STATUS_POSIX == 0)
2956 STATUS_POSIX_SET(255);
2965 register PERL_CONTEXT *cx;
2974 (void)UNLINK(e_tmpname);
2975 Safefree(e_tmpname);
2979 if (cxstack_ix >= 0) {