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 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( sv_interp )
111 register PerlInterpreter *sv_interp;
117 #endif /* FAKE_THREADS */
118 #endif /* USE_THREADS */
120 if (!(curinterp = sv_interp))
124 Zero(sv_interp, 1, PerlInterpreter);
127 /* Init the real globals (and main thread)? */
132 #ifdef ALLOC_THREAD_KEY
135 if (pthread_key_create(&thr_key, 0))
136 croak("panic: pthread_key_create");
138 MUTEX_INIT(&malloc_mutex);
139 MUTEX_INIT(&sv_mutex);
141 * Safe to use basic SV functions from now on (though
142 * not things like mortals or tainting yet).
144 MUTEX_INIT(&eval_mutex);
145 COND_INIT(&eval_cond);
146 MUTEX_INIT(&threads_mutex);
147 COND_INIT(&nthreads_cond);
149 thr = init_main_thread();
150 #endif /* USE_THREADS */
152 linestr = NEWSV(65,80);
153 sv_upgrade(linestr,SVt_PVIV);
155 if (!SvREADONLY(&sv_undef)) {
156 SvREADONLY_on(&sv_undef);
160 SvREADONLY_on(&sv_no);
162 sv_setpv(&sv_yes,Yes);
164 SvREADONLY_on(&sv_yes);
167 nrs = newSVpv("\n", 1);
168 rs = SvREFCNT_inc(nrs);
170 sighandlerp = sighandler;
175 * There is no way we can refer to them from Perl so close them to save
176 * space. The other alternative would be to provide STDAUX and STDPRN
179 (void)fclose(stdaux);
180 (void)fclose(stdprn);
186 perl_destruct_level = 1;
188 if(perl_destruct_level > 0)
193 lex_state = LEX_NOTPARSING;
195 start_env.je_prev = NULL;
196 start_env.je_ret = -1;
197 start_env.je_mustcatch = TRUE;
198 top_env = &start_env;
201 SET_NUMERIC_STANDARD();
202 #if defined(SUBVERSION) && SUBVERSION > 0
203 sprintf(patchlevel, "%7.5f", (double) 5
204 + ((double) PATCHLEVEL / (double) 1000)
205 + ((double) SUBVERSION / (double) 100000));
207 sprintf(patchlevel, "%5.3f", (double) 5 +
208 ((double) PATCHLEVEL / (double) 1000));
211 #if defined(LOCAL_PATCH_COUNT)
212 localpatches = local_patches; /* For possible -v */
215 PerlIO_init(); /* Hook to IO system */
217 fdpid = newAV(); /* for remembering popen pids by fd */
221 New(51,debname,128,char);
222 New(52,debdelim,128,char);
229 perl_destruct(sv_interp)
230 register PerlInterpreter *sv_interp;
233 int destruct_level; /* 0=none, 1=full, 2=full with checks */
238 #endif /* USE_THREADS */
240 if (!(curinterp = sv_interp))
245 /* Pass 1 on any remaining threads: detach joinables, join zombies */
247 MUTEX_LOCK(&threads_mutex);
248 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
249 "perl_destruct: waiting for %d threads...\n",
251 for (t = thr->next; t != thr; t = t->next) {
252 MUTEX_LOCK(&t->mutex);
253 switch (ThrSTATE(t)) {
256 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
257 "perl_destruct: joining zombie %p\n", t));
258 ThrSETSTATE(t, THRf_DEAD);
259 MUTEX_UNLOCK(&t->mutex);
262 * The SvREFCNT_dec below may take a long time (e.g. av
263 * may contain an object scalar whose destructor gets
264 * called) so we have to unlock threads_mutex and start
267 MUTEX_UNLOCK(&threads_mutex);
269 SvREFCNT_dec((SV*)av);
270 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
271 "perl_destruct: joined zombie %p OK\n", t));
273 case THRf_R_JOINABLE:
274 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
275 "perl_destruct: detaching thread %p\n", t));
276 ThrSETSTATE(t, THRf_R_DETACHED);
278 * We unlock threads_mutex and t->mutex in the opposite order
279 * from which we locked them just so that DETACH won't
280 * deadlock if it panics. It's only a breach of good style
281 * not a bug since they are unlocks not locks.
283 MUTEX_UNLOCK(&threads_mutex);
285 MUTEX_UNLOCK(&t->mutex);
288 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
289 "perl_destruct: ignoring %p (state %u)\n",
291 MUTEX_UNLOCK(&t->mutex);
292 /* fall through and out */
295 /* We leave the above "Pass 1" loop with threads_mutex still locked */
297 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
300 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
301 "perl_destruct: final wait for %d threads\n",
303 COND_WAIT(&nthreads_cond, &threads_mutex);
305 /* At this point, we're the last thread */
306 MUTEX_UNLOCK(&threads_mutex);
307 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
308 MUTEX_DESTROY(&threads_mutex);
309 COND_DESTROY(&nthreads_cond);
310 #endif /* !defined(FAKE_THREADS) */
311 #endif /* USE_THREADS */
313 destruct_level = perl_destruct_level;
317 if (s = getenv("PERL_DESTRUCT_LEVEL")) {
319 if (destruct_level < i)
328 /* We must account for everything. */
330 /* Destroy the main CV and syntax tree */
332 curpad = AvARRAY(comppad);
337 SvREFCNT_dec(main_cv);
342 * Try to destruct global references. We do this first so that the
343 * destructors and destructees still exist. Some sv's might remain.
344 * Non-referenced objects are on their own.
351 /* unhook hooks which will soon be, or use, destroyed data */
352 SvREFCNT_dec(warnhook);
354 SvREFCNT_dec(diehook);
356 SvREFCNT_dec(parsehook);
359 if (destruct_level == 0){
361 DEBUG_P(debprofdump());
363 /* The exit() function will do everything that needs doing. */
367 /* loosen bonds of global variables */
370 (void)PerlIO_close(rsfp);
374 /* Filters for program text */
375 SvREFCNT_dec(rsfp_filters);
376 rsfp_filters = Nullav;
388 sawampersand = FALSE; /* must save all match strings */
389 sawstudy = FALSE; /* do fbm_instr on all strings */
404 /* magical thingies */
406 Safefree(ofs); /* $, */
409 Safefree(ors); /* $\ */
412 SvREFCNT_dec(nrs); /* $\ helper */
415 multiline = 0; /* $* */
417 SvREFCNT_dec(statname);
421 /* defgv, aka *_ should be taken care of elsewhere */
423 #if 0 /* just about all regexp stuff, seems to be ok */
425 /* shortcuts to regexp stuff */
430 SAVEFREEOP(oldlastpm); /* for saving regexp context during debugger */
432 regprecomp = NULL; /* uncompiled string. */
433 regparse = NULL; /* Input-scan pointer. */
434 regxend = NULL; /* End of input for compile */
435 regnpar = 0; /* () count. */
436 regcode = NULL; /* Code-emit pointer; ®dummy = don't. */
437 regsize = 0; /* Code size. */
438 regnaughty = 0; /* How bad is this pattern? */
439 regsawback = 0; /* Did we see \1, ...? */
441 reginput = NULL; /* String-input pointer. */
442 regbol = NULL; /* Beginning of input, for ^ check. */
443 regeol = NULL; /* End of input, for $ check. */
444 regstartp = (char **)NULL; /* Pointer to startp array. */
445 regendp = (char **)NULL; /* Ditto for endp. */
446 reglastparen = 0; /* Similarly for lastparen. */
447 regtill = NULL; /* How far we are required to go. */
448 regflags = 0; /* are we folding, multilining? */
449 regprev = (char)NULL; /* char before regbol, \n if none */
453 /* clean up after study() */
454 SvREFCNT_dec(lastscream);
456 Safefree(screamfirst);
458 Safefree(screamnext);
461 /* startup and shutdown function lists */
462 SvREFCNT_dec(beginav);
464 SvREFCNT_dec(initav);
469 /* temp stack during pp_sort() */
470 SvREFCNT_dec(sortstack);
473 /* shortcuts just get cleared */
484 /* reset so print() ends up where we expect */
487 /* Prepare to destruct main symbol table. */
494 if (destruct_level >= 2) {
495 if (scopestack_ix != 0)
496 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
497 (long)scopestack_ix);
498 if (savestack_ix != 0)
499 warn("Unbalanced saves: %ld more saves than restores\n",
501 if (tmps_floor != -1)
502 warn("Unbalanced tmps: %ld more allocs than frees\n",
503 (long)tmps_floor + 1);
504 if (cxstack_ix != -1)
505 warn("Unbalanced context: %ld more PUSHes than POPs\n",
506 (long)cxstack_ix + 1);
509 /* Now absolutely destruct everything, somehow or other, loops or no. */
511 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
512 while (sv_count != 0 && sv_count != last_sv_count) {
513 last_sv_count = sv_count;
516 SvFLAGS(strtab) &= ~SVTYPEMASK;
517 SvFLAGS(strtab) |= SVt_PVHV;
519 /* Destruct the global string table. */
521 /* Yell and reset the HeVAL() slots that are still holding refcounts,
522 * so that sv_free() won't fail on them.
531 array = HvARRAY(strtab);
535 warn("Unbalanced string table refcount: (%d) for \"%s\"",
536 HeVAL(hent) - Nullsv, HeKEY(hent));
537 HeVAL(hent) = Nullsv;
547 SvREFCNT_dec(strtab);
550 warn("Scalars leaked: %ld\n", (long)sv_count);
554 /* No SVs have survived, need to clean out */
558 Safefree(origfilename);
560 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
562 DEBUG_P(debprofdump());
564 MUTEX_DESTROY(&sv_mutex);
565 MUTEX_DESTROY(&malloc_mutex);
566 MUTEX_DESTROY(&eval_mutex);
567 COND_DESTROY(&eval_cond);
569 /* As the penultimate thing, free the non-arena SV for thrsv */
570 Safefree(SvPVX(thrsv));
571 Safefree(SvANY(thrsv));
574 #endif /* USE_THREADS */
576 /* As the absolutely last thing, free the non-arena SV for mess() */
579 /* we know that type >= SVt_PV */
581 Safefree(SvPVX(mess_sv));
582 Safefree(SvANY(mess_sv));
590 PerlInterpreter *sv_interp;
592 if (!(curinterp = sv_interp))
598 perl_parse(sv_interp, xsinit, argc, argv, env)
599 PerlInterpreter *sv_interp;
600 void (*xsinit)_((void));
608 char *scriptname = NULL;
609 VOL bool dosearch = FALSE;
616 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
619 croak("suidperl is no longer needed since the kernel can now execute\n\
620 setuid perl scripts securely.\n");
624 if (!(curinterp = sv_interp))
627 #if defined(NeXT) && defined(__DYNAMIC__)
628 _dyld_lookup_and_bind
629 ("__environ", (unsigned long *) &environ_pointer, NULL);
634 #ifndef VMS /* VMS doesn't have environ array */
635 origenviron = environ;
641 /* Come here if running an undumped a.out. */
643 origfilename = savepv(argv[0]);
645 cxstack_ix = -1; /* start label stack again */
647 init_postdump_symbols(argc,argv,env);
652 curpad = AvARRAY(comppad);
657 SvREFCNT_dec(main_cv);
661 oldscope = scopestack_ix;
669 /* my_exit() was called */
670 while (scopestack_ix > oldscope)
675 call_list(oldscope, endav);
677 return STATUS_NATIVE_EXPORT;
680 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
684 sv_setpvn(linestr,"",0);
685 sv = newSVpv("",0); /* first used for -I flags */
689 for (argc--,argv++; argc > 0; argc--,argv++) {
690 if (argv[0][0] != '-' || !argv[0][1])
694 validarg = " PHOOEY ";
719 if (s = moreswitches(s))
729 if (euid != uid || egid != gid)
730 croak("No -e allowed in setuid scripts");
732 e_tmpname = savepv(TMPPATH);
733 (void)mktemp(e_tmpname);
735 croak("Can't mktemp()");
736 e_fp = PerlIO_open(e_tmpname,"w");
738 croak("Cannot open temporary file");
743 PerlIO_puts(e_fp,argv[1]);
747 croak("No code specified for -e");
748 (void)PerlIO_putc(e_fp,'\n');
750 case 'I': /* -I handled both here and in moreswitches() */
752 if (!*++s && (s=argv[1]) != Nullch) {
755 while (s && isSPACE(*s))
759 for (e = s; *e && !isSPACE(*e); e++) ;
766 } /* XXX else croak? */
780 preambleav = newAV();
781 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
783 Sv = newSVpv("print myconfig();",0);
785 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
787 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
789 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
790 sv_catpv(Sv,"\" Compile-time options:");
792 sv_catpv(Sv," DEBUGGING");
795 sv_catpv(Sv," NO_EMBED");
798 sv_catpv(Sv," MULTIPLICITY");
800 sv_catpv(Sv,"\\n\",");
802 #if defined(LOCAL_PATCH_COUNT)
803 if (LOCAL_PATCH_COUNT > 0) {
805 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
806 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
808 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
812 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
815 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
817 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
822 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
823 print \" \\%ENV:\\n @env\\n\" if @env; \
824 print \" \\@INC:\\n @INC\\n\";");
827 Sv = newSVpv("config_vars(qw(",0);
832 av_push(preambleav, Sv);
833 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
844 if (!*++s || isSPACE(*s)) {
848 /* catch use of gnu style long options */
849 if (strEQ(s, "version")) {
853 if (strEQ(s, "help")) {
860 croak("Unrecognized switch: -%s (-h will show valid options)",s);
865 if (!tainting && (s = getenv("PERL5OPT"))) {
876 if (!strchr("DIMUdmw", *s))
877 croak("Illegal switch in PERL5OPT: -%c", *s);
883 scriptname = argv[0];
885 if (PerlIO_flush(e_fp) || PerlIO_error(e_fp) || PerlIO_close(e_fp)) {
887 warn("Did you forget to compile with -DMULTIPLICITY?");
889 croak("Can't write to temp file for -e: %s", Strerror(errno));
893 scriptname = e_tmpname;
895 else if (scriptname == Nullch) {
897 if ( isatty(PerlIO_fileno(PerlIO_stdin())) )
905 open_script(scriptname,dosearch,sv);
907 validate_suid(validarg, scriptname);
912 main_cv = compcv = (CV*)NEWSV(1104,0);
913 sv_upgrade((SV *)compcv, SVt_PVCV);
917 av_push(comppad, Nullsv);
918 curpad = AvARRAY(comppad);
919 comppad_name = newAV();
920 comppad_name_fill = 0;
921 min_intro_pending = 0;
924 av_store(comppad_name, 0, newSVpv("@_", 2));
925 curpad[0] = (SV*)newAV();
926 SvPADMY_on(curpad[0]); /* XXX Needed? */
928 New(666, CvMUTEXP(compcv), 1, perl_mutex);
929 MUTEX_INIT(CvMUTEXP(compcv));
930 #endif /* USE_THREADS */
932 comppadlist = newAV();
933 AvREAL_off(comppadlist);
934 av_store(comppadlist, 0, (SV*)comppad_name);
935 av_store(comppadlist, 1, (SV*)comppad);
936 CvPADLIST(compcv) = comppadlist;
938 boot_core_UNIVERSAL();
940 (*xsinit)(); /* in case linked C routines want magical variables */
941 #if defined(VMS) || defined(WIN32)
945 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
946 DEBUG_L(signal(SIGSEGV, (void(*)(int))catch_sigsegv););
949 init_predump_symbols();
951 init_postdump_symbols(argc,argv,env);
955 /* now parse the script */
958 if (yyparse() || error_count) {
960 croak("%s had compilation errors.\n", origfilename);
962 croak("Execution of %s aborted due to compilation errors.\n",
966 curcop->cop_line = 0;
970 (void)UNLINK(e_tmpname);
975 /* now that script is parsed, we can modify record separator */
977 rs = SvREFCNT_inc(nrs);
979 sv_setsv(*av_fetch(thr->magicals, find_thread_magical("/"), FALSE), rs);
981 sv_setsv(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), rs);
982 #endif /* USE_THREADS */
993 if ((s=getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
994 dump_mstats("after compilation:");
1005 PerlInterpreter *sv_interp;
1012 if (!(curinterp = sv_interp))
1015 oldscope = scopestack_ix;
1020 cxstack_ix = -1; /* start context stack again */
1023 /* my_exit() was called */
1024 while (scopestack_ix > oldscope)
1027 curstash = defstash;
1029 call_list(oldscope, endav);
1031 if (getenv("PERL_DEBUG_MSTATS"))
1032 dump_mstats("after execution: ");
1035 return STATUS_NATIVE_EXPORT;
1038 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1043 if (curstack != mainstack) {
1045 SWITCHSTACK(curstack, mainstack);
1050 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1051 sawampersand ? "Enabling" : "Omitting"));
1054 DEBUG_x(dump_all());
1055 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1057 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1058 (unsigned long) thr));
1059 #endif /* USE_THREADS */
1062 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1065 if (PERLDB_SINGLE && DBsingle)
1066 sv_setiv(DBsingle, 1);
1068 call_list(oldscope, initav);
1078 else if (main_start) {
1079 CvDEPTH(main_cv) = 1;
1090 perl_get_sv(name, create)
1094 GV* gv = gv_fetchpv(name, create, SVt_PV);
1101 perl_get_av(name, create)
1105 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1114 perl_get_hv(name, create)
1118 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1127 perl_get_cv(name, create)
1131 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1132 if (create && !GvCVu(gv))
1133 return newSUB(start_subparse(FALSE, 0),
1134 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1142 /* Be sure to refetch the stack pointer after calling these routines. */
1145 perl_call_argv(subname, flags, argv)
1147 I32 flags; /* See G_* flags in cop.h */
1148 register char **argv; /* null terminated arg list */
1156 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1161 return perl_call_pv(subname, flags);
1165 perl_call_pv(subname, flags)
1166 char *subname; /* name of the subroutine */
1167 I32 flags; /* See G_* flags in cop.h */
1169 return perl_call_sv((SV*)perl_get_cv(subname, TRUE), flags);
1173 perl_call_method(methname, flags)
1174 char *methname; /* name of the subroutine */
1175 I32 flags; /* See G_* flags in cop.h */
1182 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1185 return perl_call_sv(*stack_sp--, flags);
1188 /* May be called with any of a CV, a GV, or an SV containing the name. */
1190 perl_call_sv(sv, flags)
1192 I32 flags; /* See G_* flags in cop.h */
1195 LOGOP myop; /* fake syntax tree node */
1201 bool oldcatch = CATCH_GET;
1206 if (flags & G_DISCARD) {
1211 Zero(&myop, 1, LOGOP);
1212 myop.op_next = Nullop;
1213 if (!(flags & G_NOARGS))
1214 myop.op_flags |= OPf_STACKED;
1215 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1216 (flags & G_ARRAY) ? OPf_WANT_LIST :
1221 EXTEND(stack_sp, 1);
1224 oldscope = scopestack_ix;
1226 if (PERLDB_SUB && curstash != debstash
1227 /* Handle first BEGIN of -d. */
1228 && (DBcv || (DBcv = GvCV(DBsub)))
1229 /* Try harder, since this may have been a sighandler, thus
1230 * curstash may be meaningless. */
1231 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash))
1232 op->op_private |= OPpENTERSUB_DB;
1234 if (flags & G_EVAL) {
1235 cLOGOP->op_other = op;
1237 /* we're trying to emulate pp_entertry() here */
1239 register CONTEXT *cx;
1240 I32 gimme = GIMME_V;
1245 push_return(op->op_next);
1246 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1248 eval_root = op; /* Only needed so that goto works right. */
1251 if (flags & G_KEEPERR)
1266 /* my_exit() was called */
1267 curstash = defstash;
1271 croak("Callback called exit");
1280 stack_sp = stack_base + oldmark;
1281 if (flags & G_ARRAY)
1285 *++stack_sp = &sv_undef;
1293 if (op == (OP*)&myop)
1294 op = pp_entersub(ARGS);
1297 retval = stack_sp - (stack_base + oldmark);
1298 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1302 if (flags & G_EVAL) {
1303 if (scopestack_ix > oldscope) {
1307 register CONTEXT *cx;
1319 CATCH_SET(oldcatch);
1321 if (flags & G_DISCARD) {
1322 stack_sp = stack_base + oldmark;
1331 /* Eval a string. The G_EVAL flag is always assumed. */
1334 perl_eval_sv(sv, flags)
1336 I32 flags; /* See G_* flags in cop.h */
1339 UNOP myop; /* fake syntax tree node */
1341 I32 oldmark = sp - stack_base;
1348 if (flags & G_DISCARD) {
1356 EXTEND(stack_sp, 1);
1358 oldscope = scopestack_ix;
1360 if (!(flags & G_NOARGS))
1361 myop.op_flags = OPf_STACKED;
1362 myop.op_next = Nullop;
1363 myop.op_type = OP_ENTEREVAL;
1364 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1365 (flags & G_ARRAY) ? OPf_WANT_LIST :
1367 if (flags & G_KEEPERR)
1368 myop.op_flags |= OPf_SPECIAL;
1378 /* my_exit() was called */
1379 curstash = defstash;
1383 croak("Callback called exit");
1392 stack_sp = stack_base + oldmark;
1393 if (flags & G_ARRAY)
1397 *++stack_sp = &sv_undef;
1402 if (op == (OP*)&myop)
1403 op = pp_entereval(ARGS);
1406 retval = stack_sp - (stack_base + oldmark);
1407 if (!(flags & G_KEEPERR))
1412 if (flags & G_DISCARD) {
1413 stack_sp = stack_base + oldmark;
1423 perl_eval_pv(p, croak_on_error)
1429 SV* sv = newSVpv(p, 0);
1432 perl_eval_sv(sv, G_SCALAR);
1439 if (croak_on_error && SvTRUE(errsv))
1440 croak(SvPV(errsv, na));
1445 /* Require a module. */
1451 SV* sv = sv_newmortal();
1452 sv_setpv(sv, "require '");
1455 perl_eval_sv(sv, G_DISCARD);
1459 magicname(sym,name,namlen)
1466 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1467 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1471 usage(name) /* XXX move this out into a module ? */
1474 /* This message really ought to be max 23 lines.
1475 * Removed -h because the user already knows that opton. Others? */
1477 static char *usage[] = {
1478 "-0[octal] specify record separator (\\0, if no argument)",
1479 "-a autosplit mode with -n or -p (splits $_ into @F)",
1480 "-c check syntax only (runs BEGIN and END blocks)",
1481 "-d[:debugger] run scripts under debugger",
1482 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1483 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1484 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1485 "-i[extension] edit <> files in place (make backup if extension supplied)",
1486 "-Idirectory specify @INC/#include directory (may be used more than once)",
1487 "-l[octal] enable line ending processing, specifies line terminator",
1488 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1489 "-n assume 'while (<>) { ... }' loop around your script",
1490 "-p assume loop like -n but print line also like sed",
1491 "-P run script through C preprocessor before compilation",
1492 "-s enable some switch parsing for switches after script name",
1493 "-S look for the script using PATH environment variable",
1494 "-T turn on tainting checks",
1495 "-u dump core after parsing script",
1496 "-U allow unsafe operations",
1497 "-v print version number and patchlevel of perl",
1498 "-V[:variable] print perl configuration information",
1499 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1500 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1506 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1508 printf("\n %s", *p++);
1511 /* This routine handles any switches that can be given during run */
1524 rschar = scan_oct(s, 4, &numlen);
1526 if (rschar & ~((U8)~0))
1528 else if (!rschar && numlen >= 2)
1529 nrs = newSVpv("", 0);
1532 nrs = newSVpv(&ch, 1);
1538 splitstr = savepv(s + 1);
1552 if (*s == ':' || *s == '=') {
1553 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1557 perldb = PERLDB_ALL;
1564 if (isALPHA(s[1])) {
1565 static char debopts[] = "psltocPmfrxuLHXD";
1568 for (s++; *s && (d = strchr(debopts,*s)); s++)
1569 debug |= 1 << (d - debopts);
1573 for (s++; isDIGIT(*s); s++) ;
1575 debug |= 0x80000000;
1577 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1578 for (s++; isALNUM(*s); s++) ;
1588 inplace = savepv(s+1);
1590 for (s = inplace; *s && !isSPACE(*s); s++) ;
1594 case 'I': /* -I handled both here and in parse_perl() */
1597 while (*s && isSPACE(*s))
1601 for (e = s; *e && !isSPACE(*e); e++) ;
1602 p = savepvn(s, e-s);
1608 croak("No space allowed after -I");
1618 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1628 ors = SvPV(nrs, orslen);
1629 ors = savepvn(ors, orslen);
1633 forbid_setid("-M"); /* XXX ? */
1636 forbid_setid("-m"); /* XXX ? */
1641 /* -M-foo == 'no foo' */
1642 if (*s == '-') { use = "no "; ++s; }
1643 sv = newSVpv(use,0);
1645 /* We allow -M'Module qw(Foo Bar)' */
1646 while(isALNUM(*s) || *s==':') ++s;
1648 sv_catpv(sv, start);
1649 if (*(start-1) == 'm') {
1651 croak("Can't use '%c' after -mname", *s);
1652 sv_catpv( sv, " ()");
1655 sv_catpvn(sv, start, s-start);
1656 sv_catpv(sv, " split(/,/,q{");
1661 if (preambleav == NULL)
1662 preambleav = newAV();
1663 av_push(preambleav, sv);
1666 croak("No space allowed after -%c", *(s-1));
1683 croak("Too late for \"-T\" option");
1695 #if defined(SUBVERSION) && SUBVERSION > 0
1696 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1697 PATCHLEVEL, SUBVERSION, ARCHNAME);
1699 printf("\nThis is perl, version %s built for %s",
1700 patchlevel, ARCHNAME);
1702 #if defined(LOCAL_PATCH_COUNT)
1703 if (LOCAL_PATCH_COUNT > 0)
1704 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1705 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1708 printf("\n\nCopyright 1987-1997, Larry Wall\n");
1710 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1713 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1716 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1717 "Version 5 port Copyright (c) 1994-1997, Andreas Kaiser, Ilya Zakharevich\n");
1720 printf("atariST series port, ++jrb bammi@cadence.com\n");
1723 Perl may be copied only under the terms of either the Artistic License or the\n\
1724 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n");
1732 if (s[1] == '-') /* Additional switches on #! line. */
1740 #ifdef ALTERNATE_SHEBANG
1741 case 'S': /* OS/2 needs -S on "extproc" line. */
1749 croak("Can't emulate -%.1s on #! line",s);
1754 /* compliments of Tom Christiansen */
1756 /* unexec() can be found in the Gnu emacs distribution */
1767 prog = newSVpv(BIN_EXP);
1768 sv_catpv(prog, "/perl");
1769 file = newSVpv(origfilename);
1770 sv_catpv(file, ".perldump");
1772 status = unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1774 PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n",
1775 SvPVX(prog), SvPVX(file));
1779 # include <lib$routines.h>
1780 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1782 ABORT(); /* for use with undump */
1793 /* Note that strtab is a rather special HV. Assumptions are made
1794 about not iterating on it, and not adding tie magic to it.
1795 It is properly deallocated in perl_destruct() */
1797 HvSHAREKEYS_off(strtab); /* mandatory */
1798 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1799 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1801 curstash = defstash = newHV();
1802 curstname = newSVpv("main",4);
1803 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1804 SvREFCNT_dec(GvHV(gv));
1805 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1807 HvNAME(defstash) = savepv("main");
1808 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1810 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1811 errsv = newSVpv("", 0);
1813 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1814 sv_grow(errsv, 240); /* Preallocate - for immediate signals. */
1815 sv_setpvn(errsv, "", 0);
1816 curstash = defstash;
1817 compiling.cop_stash = defstash;
1818 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1819 /* We must init $/ before switches are processed. */
1820 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1823 #ifdef CAN_PROTOTYPE
1825 open_script(char *scriptname, bool dosearch, SV *sv)
1828 open_script(scriptname,dosearch,sv)
1835 char *xfound = Nullch;
1836 char *xfailed = Nullch;
1840 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
1841 # define SEARCH_EXTS ".bat", ".cmd", NULL
1842 # define MAX_EXT_LEN 4
1845 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
1846 # define MAX_EXT_LEN 4
1849 # define SEARCH_EXTS ".pl", ".com", NULL
1850 # define MAX_EXT_LEN 4
1852 /* additional extensions to try in each dir if scriptname not found */
1854 char *ext[] = { SEARCH_EXTS };
1855 int extidx = 0, i = 0;
1856 char *curext = Nullch;
1858 # define MAX_EXT_LEN 0
1862 * If dosearch is true and if scriptname does not contain path
1863 * delimiters, search the PATH for scriptname.
1865 * If SEARCH_EXTS is also defined, will look for each
1866 * scriptname{SEARCH_EXTS} whenever scriptname is not found
1867 * while searching the PATH.
1869 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
1870 * proceeds as follows:
1872 * + look for ./scriptname{,.foo,.bar}
1873 * + search the PATH for scriptname{,.foo,.bar}
1876 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
1877 * this will not look in '.' if it's not in the PATH)
1882 int hasdir, idx = 0, deftypes = 1;
1885 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
1886 /* The first time through, just add SEARCH_EXTS to whatever we
1887 * already have, so we can check for default file types. */
1889 (!hasdir && my_trnlnm("DCL$PATH",tokenbuf,idx++)) )
1895 if ((strlen(tokenbuf) + strlen(scriptname)
1896 + MAX_EXT_LEN) >= sizeof tokenbuf)
1897 continue; /* don't search dir with too-long name */
1898 strcat(tokenbuf, scriptname);
1902 if (strEQ(scriptname, "-"))
1904 if (dosearch) { /* Look in '.' first. */
1905 char *cur = scriptname;
1907 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
1909 if (strEQ(ext[i++],curext)) {
1910 extidx = -1; /* already has an ext */
1915 DEBUG_p(PerlIO_printf(Perl_debug_log,
1916 "Looking for %s\n",cur));
1917 if (Stat(cur,&statbuf) >= 0) {
1925 if (cur == scriptname) {
1926 len = strlen(scriptname);
1927 if (len+MAX_EXT_LEN+1 >= sizeof(tokenbuf))
1929 cur = strcpy(tokenbuf, scriptname);
1931 } while (extidx >= 0 && ext[extidx] /* try an extension? */
1932 && strcpy(tokenbuf+len, ext[extidx++]));
1937 if (dosearch && !strchr(scriptname, '/')
1939 && !strchr(scriptname, '\\')
1941 && (s = getenv("PATH"))) {
1944 bufend = s + strlen(s);
1945 while (s < bufend) {
1946 #if defined(atarist) || defined(DOSISH)
1951 && *s != ';'; len++, s++) {
1952 if (len < sizeof tokenbuf)
1955 if (len < sizeof tokenbuf)
1956 tokenbuf[len] = '\0';
1957 #else /* ! (atarist || DOSISH) */
1958 s = delimcpy(tokenbuf, tokenbuf + sizeof tokenbuf, s, bufend,
1961 #endif /* ! (atarist || DOSISH) */
1964 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tokenbuf)
1965 continue; /* don't search dir with too-long name */
1967 #if defined(atarist) || defined(DOSISH)
1968 && tokenbuf[len - 1] != '/'
1969 && tokenbuf[len - 1] != '\\'
1972 tokenbuf[len++] = '/';
1973 if (len == 2 && tokenbuf[0] == '.')
1975 (void)strcpy(tokenbuf + len, scriptname);
1979 len = strlen(tokenbuf);
1980 if (extidx > 0) /* reset after previous loop */
1984 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tokenbuf));
1985 retval = Stat(tokenbuf,&statbuf);
1987 } while ( retval < 0 /* not there */
1988 && extidx>=0 && ext[extidx] /* try an extension? */
1989 && strcpy(tokenbuf+len, ext[extidx++])
1994 if (S_ISREG(statbuf.st_mode)
1995 && cando(S_IRUSR,TRUE,&statbuf)
1997 && cando(S_IXUSR,TRUE,&statbuf)
2001 xfound = tokenbuf; /* bingo! */
2005 xfailed = savepv(tokenbuf);
2008 if (!xfound && !seen_dot && !xfailed && (Stat(scriptname,&statbuf) < 0))
2010 seen_dot = 1; /* Disable message. */
2012 croak("Can't %s %s%s%s",
2013 (xfailed ? "execute" : "find"),
2014 (xfailed ? xfailed : scriptname),
2015 (xfailed ? "" : " on PATH"),
2016 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2019 scriptname = xfound;
2022 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2023 char *s = scriptname + 8;
2032 origfilename = savepv(e_tmpname ? "-e" : scriptname);
2033 curcop->cop_filegv = gv_fetchfile(origfilename);
2034 if (strEQ(origfilename,"-"))
2036 if (fdscript >= 0) {
2037 rsfp = PerlIO_fdopen(fdscript,"r");
2038 #if defined(HAS_FCNTL) && defined(F_SETFD)
2040 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2043 else if (preprocess) {
2044 char *cpp_cfg = CPPSTDIN;
2045 SV *cpp = NEWSV(0,0);
2046 SV *cmd = NEWSV(0,0);
2048 if (strEQ(cpp_cfg, "cppstdin"))
2049 sv_catpvf(cpp, "%s/", BIN_EXP);
2050 sv_catpv(cpp, cpp_cfg);
2053 sv_catpv(sv,PRIVLIB_EXP);
2057 sed %s -e \"/^[^#]/b\" \
2058 -e \"/^#[ ]*include[ ]/b\" \
2059 -e \"/^#[ ]*define[ ]/b\" \
2060 -e \"/^#[ ]*if[ ]/b\" \
2061 -e \"/^#[ ]*ifdef[ ]/b\" \
2062 -e \"/^#[ ]*ifndef[ ]/b\" \
2063 -e \"/^#[ ]*else/b\" \
2064 -e \"/^#[ ]*elif[ ]/b\" \
2065 -e \"/^#[ ]*undef[ ]/b\" \
2066 -e \"/^#[ ]*endif/b\" \
2069 (doextract ? "-e \"1,/^#/d\n\"" : ""),
2072 %s %s -e '/^[^#]/b' \
2073 -e '/^#[ ]*include[ ]/b' \
2074 -e '/^#[ ]*define[ ]/b' \
2075 -e '/^#[ ]*if[ ]/b' \
2076 -e '/^#[ ]*ifdef[ ]/b' \
2077 -e '/^#[ ]*ifndef[ ]/b' \
2078 -e '/^#[ ]*else/b' \
2079 -e '/^#[ ]*elif[ ]/b' \
2080 -e '/^#[ ]*undef[ ]/b' \
2081 -e '/^#[ ]*endif/b' \
2089 (doextract ? "-e '1,/^#/d\n'" : ""),
2091 scriptname, cpp, sv, CPPMINUS);
2093 #ifdef IAMSUID /* actually, this is caught earlier */
2094 if (euid != uid && !euid) { /* if running suidperl */
2096 (void)seteuid(uid); /* musn't stay setuid root */
2099 (void)setreuid((Uid_t)-1, uid);
2101 #ifdef HAS_SETRESUID
2102 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
2108 if (geteuid() != uid)
2109 croak("Can't do seteuid!\n");
2111 #endif /* IAMSUID */
2112 rsfp = my_popen(SvPVX(cmd), "r");
2116 else if (!*scriptname) {
2117 forbid_setid("program input from stdin");
2118 rsfp = PerlIO_stdin();
2121 rsfp = PerlIO_open(scriptname,"r");
2122 #if defined(HAS_FCNTL) && defined(F_SETFD)
2124 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2132 #ifndef IAMSUID /* in case script is not readable before setuid */
2133 if (euid && Stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2134 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2136 execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2137 croak("Can't do setuid\n");
2141 croak("Can't open perl script \"%s\": %s\n",
2142 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2147 validate_suid(validarg, scriptname)
2153 /* do we need to emulate setuid on scripts? */
2155 /* This code is for those BSD systems that have setuid #! scripts disabled
2156 * in the kernel because of a security problem. Merely defining DOSUID
2157 * in perl will not fix that problem, but if you have disabled setuid
2158 * scripts in the kernel, this will attempt to emulate setuid and setgid
2159 * on scripts that have those now-otherwise-useless bits set. The setuid
2160 * root version must be called suidperl or sperlN.NNN. If regular perl
2161 * discovers that it has opened a setuid script, it calls suidperl with
2162 * the same argv that it had. If suidperl finds that the script it has
2163 * just opened is NOT setuid root, it sets the effective uid back to the
2164 * uid. We don't just make perl setuid root because that loses the
2165 * effective uid we had before invoking perl, if it was different from the
2168 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2169 * be defined in suidperl only. suidperl must be setuid root. The
2170 * Configure script will set this up for you if you want it.
2177 if (Fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2178 croak("Can't stat script \"%s\"",origfilename);
2179 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2183 #ifndef HAS_SETREUID
2184 /* On this access check to make sure the directories are readable,
2185 * there is actually a small window that the user could use to make
2186 * filename point to an accessible directory. So there is a faint
2187 * chance that someone could execute a setuid script down in a
2188 * non-accessible directory. I don't know what to do about that.
2189 * But I don't think it's too important. The manual lies when
2190 * it says access() is useful in setuid programs.
2192 if (access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2193 croak("Permission denied");
2195 /* If we can swap euid and uid, then we can determine access rights
2196 * with a simple stat of the file, and then compare device and
2197 * inode to make sure we did stat() on the same file we opened.
2198 * Then we just have to make sure he or she can execute it.
2201 struct stat tmpstatbuf;
2205 setreuid(euid,uid) < 0
2208 setresuid(euid,uid,(Uid_t)-1) < 0
2211 || getuid() != euid || geteuid() != uid)
2212 croak("Can't swap uid and euid"); /* really paranoid */
2213 if (Stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2214 croak("Permission denied"); /* testing full pathname here */
2215 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2216 tmpstatbuf.st_ino != statbuf.st_ino) {
2217 (void)PerlIO_close(rsfp);
2218 if (rsfp = my_popen("/bin/mail root","w")) { /* heh, heh */
2220 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2221 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2222 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2223 (long)statbuf.st_dev, (long)statbuf.st_ino,
2224 SvPVX(GvSV(curcop->cop_filegv)),
2225 (long)statbuf.st_uid, (long)statbuf.st_gid);
2226 (void)my_pclose(rsfp);
2228 croak("Permission denied\n");
2232 setreuid(uid,euid) < 0
2234 # if defined(HAS_SETRESUID)
2235 setresuid(uid,euid,(Uid_t)-1) < 0
2238 || getuid() != uid || geteuid() != euid)
2239 croak("Can't reswap uid and euid");
2240 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2241 croak("Permission denied\n");
2243 #endif /* HAS_SETREUID */
2244 #endif /* IAMSUID */
2246 if (!S_ISREG(statbuf.st_mode))
2247 croak("Permission denied");
2248 if (statbuf.st_mode & S_IWOTH)
2249 croak("Setuid/gid script is writable by world");
2250 doswitches = FALSE; /* -s is insecure in suid */
2252 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2253 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2254 croak("No #! line");
2255 s = SvPV(linestr,na)+2;
2257 while (!isSPACE(*s)) s++;
2258 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2259 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2260 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2261 croak("Not a perl script");
2262 while (*s == ' ' || *s == '\t') s++;
2264 * #! arg must be what we saw above. They can invoke it by
2265 * mentioning suidperl explicitly, but they may not add any strange
2266 * arguments beyond what #! says if they do invoke suidperl that way.
2268 len = strlen(validarg);
2269 if (strEQ(validarg," PHOOEY ") ||
2270 strnNE(s,validarg,len) || !isSPACE(s[len]))
2271 croak("Args must match #! line");
2274 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2275 euid == statbuf.st_uid)
2277 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2278 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2279 #endif /* IAMSUID */
2281 if (euid) { /* oops, we're not the setuid root perl */
2282 (void)PerlIO_close(rsfp);
2285 execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2287 croak("Can't do setuid\n");
2290 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2292 (void)setegid(statbuf.st_gid);
2295 (void)setregid((Gid_t)-1,statbuf.st_gid);
2297 #ifdef HAS_SETRESGID
2298 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2300 setgid(statbuf.st_gid);
2304 if (getegid() != statbuf.st_gid)
2305 croak("Can't do setegid!\n");
2307 if (statbuf.st_mode & S_ISUID) {
2308 if (statbuf.st_uid != euid)
2310 (void)seteuid(statbuf.st_uid); /* all that for this */
2313 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2315 #ifdef HAS_SETRESUID
2316 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2318 setuid(statbuf.st_uid);
2322 if (geteuid() != statbuf.st_uid)
2323 croak("Can't do seteuid!\n");
2325 else if (uid) { /* oops, mustn't run as root */
2327 (void)seteuid((Uid_t)uid);
2330 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2332 #ifdef HAS_SETRESUID
2333 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2339 if (geteuid() != uid)
2340 croak("Can't do seteuid!\n");
2343 if (!cando(S_IXUSR,TRUE,&statbuf))
2344 croak("Permission denied\n"); /* they can't do this */
2347 else if (preprocess)
2348 croak("-P not allowed for setuid/setgid script\n");
2349 else if (fdscript >= 0)
2350 croak("fd script not allowed in suidperl\n");
2352 croak("Script is not setuid/setgid in suidperl\n");
2354 /* We absolutely must clear out any saved ids here, so we */
2355 /* exec the real perl, substituting fd script for scriptname. */
2356 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2357 PerlIO_rewind(rsfp);
2358 lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2359 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2360 if (!origargv[which])
2361 croak("Permission denied");
2362 origargv[which] = savepv(form("/dev/fd/%d/%s",
2363 PerlIO_fileno(rsfp), origargv[which]));
2364 #if defined(HAS_FCNTL) && defined(F_SETFD)
2365 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2367 execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2368 croak("Can't do setuid\n");
2369 #endif /* IAMSUID */
2371 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2372 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2374 Fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2375 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2377 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2380 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2381 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2382 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2383 /* not set-id, must be wrapped */
2391 register char *s, *s2;
2393 /* skip forward in input to the real script? */
2397 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2398 croak("No Perl script found in input\n");
2399 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2400 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2402 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2404 while (*s == ' ' || *s == '\t') s++;
2406 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2407 if (strnEQ(s2-4,"perl",4))
2409 while (s = moreswitches(s)) ;
2411 if (cddir && chdir(cddir) < 0)
2412 croak("Can't chdir to %s",cddir);
2420 uid = (int)getuid();
2421 euid = (int)geteuid();
2422 gid = (int)getgid();
2423 egid = (int)getegid();
2428 tainting |= (uid && (euid != uid || egid != gid));
2436 croak("No %s allowed while running setuid", s);
2438 croak("No %s allowed while running setgid", s);
2445 curstash = debstash;
2446 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2448 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2449 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2450 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2451 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2452 sv_setiv(DBsingle, 0);
2453 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2454 sv_setiv(DBtrace, 0);
2455 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2456 sv_setiv(DBsignal, 0);
2457 curstash = defstash;
2465 mainstack = curstack; /* remember in case we switch stacks */
2466 AvREAL_off(curstack); /* not a real array */
2467 av_extend(curstack,127);
2469 stack_base = AvARRAY(curstack);
2470 stack_sp = stack_base;
2471 stack_max = stack_base + 127;
2473 cxstack_max = 8192 / sizeof(CONTEXT) - 2; /* Use most of 8K. */
2474 New(50,cxstack,cxstack_max + 1,CONTEXT);
2477 New(50,tmps_stack,128,SV*);
2483 * The following stacks almost certainly should be per-interpreter,
2484 * but for now they're not. XXX
2488 markstack_ptr = markstack;
2490 New(54,markstack,64,I32);
2491 markstack_ptr = markstack;
2492 markstack_max = markstack + 64;
2498 New(54,scopestack,32,I32);
2500 scopestack_max = 32;
2506 New(54,savestack,128,ANY);
2508 savestack_max = 128;
2514 New(54,retstack,16,OP*);
2525 Safefree(tmps_stack);
2532 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2541 subname = newSVpv("main",4);
2545 init_predump_symbols()
2552 sv_setpvn(*av_fetch(thr->magicals,find_thread_magical("\""),FALSE)," ", 1);
2554 sv_setpvn(GvSV(gv_fetchpv("\"", TRUE, SVt_PV)), " ", 1);
2555 #endif /* USE_THREADS */
2557 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2558 GvMULTI_on(stdingv);
2559 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2560 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2562 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2564 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2566 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2568 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2570 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2572 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2573 GvMULTI_on(othergv);
2574 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2575 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2577 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2579 statname = NEWSV(66,0); /* last filename we did stat on */
2582 osname = savepv(OSNAME);
2586 init_postdump_symbols(argc,argv,env)
2588 register char **argv;
2589 register char **env;
2596 argc--,argv++; /* skip name of script */
2598 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2601 if (argv[0][1] == '-') {
2605 if (s = strchr(argv[0], '=')) {
2607 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2610 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2613 toptarget = NEWSV(0,0);
2614 sv_upgrade(toptarget, SVt_PVFM);
2615 sv_setpvn(toptarget, "", 0);
2616 bodytarget = NEWSV(0,0);
2617 sv_upgrade(bodytarget, SVt_PVFM);
2618 sv_setpvn(bodytarget, "", 0);
2619 formtarget = bodytarget;
2622 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2623 sv_setpv(GvSV(tmpgv),origfilename);
2624 magicname("0", "0", 1);
2626 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2627 sv_setpv(GvSV(tmpgv),origargv[0]);
2628 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2630 (void)gv_AVadd(argvgv);
2631 av_clear(GvAVn(argvgv));
2632 for (; argc > 0; argc--,argv++) {
2633 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2636 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2640 hv_magic(hv, envgv, 'E');
2641 #ifndef VMS /* VMS doesn't have environ array */
2642 /* Note that if the supplied env parameter is actually a copy
2643 of the global environ then it may now point to free'd memory
2644 if the environment has been modified since. To avoid this
2645 problem we treat env==NULL as meaning 'use the default'
2650 environ[0] = Nullch;
2651 for (; *env; env++) {
2652 if (!(s = strchr(*env,'=')))
2658 sv = newSVpv(s--,0);
2659 (void)hv_store(hv, *env, s - *env, sv, 0);
2661 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2662 /* Sins of the RTL. See note in my_setenv(). */
2663 (void)putenv(savepv(*env));
2667 #ifdef DYNAMIC_ENV_FETCH
2668 HvNAME(hv) = savepv(ENV_HV_NAME);
2672 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2673 sv_setiv(GvSV(tmpgv), (IV)getpid());
2682 s = getenv("PERL5LIB");
2686 incpush(getenv("PERLLIB"), FALSE);
2688 /* Treat PERL5?LIB as a possible search list logical name -- the
2689 * "natural" VMS idiom for a Unix path string. We allow each
2690 * element to be a set of |-separated directories for compatibility.
2694 if (my_trnlnm("PERL5LIB",buf,0))
2695 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2697 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2701 /* Use the ~-expanded versions of APPLLIB (undocumented),
2702 ARCHLIB PRIVLIB SITEARCH SITELIB and OLDARCHLIB
2705 incpush(APPLLIB_EXP, FALSE);
2709 incpush(ARCHLIB_EXP, FALSE);
2712 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2714 incpush(PRIVLIB_EXP, FALSE);
2717 incpush(SITEARCH_EXP, FALSE);
2720 incpush(SITELIB_EXP, FALSE);
2722 #ifdef OLDARCHLIB_EXP /* 5.00[01] compatibility */
2723 incpush(OLDARCHLIB_EXP, FALSE);
2727 incpush(".", FALSE);
2731 # define PERLLIB_SEP ';'
2734 # define PERLLIB_SEP '|'
2736 # define PERLLIB_SEP ':'
2739 #ifndef PERLLIB_MANGLE
2740 # define PERLLIB_MANGLE(s,n) (s)
2744 incpush(p, addsubdirs)
2748 SV *subdir = Nullsv;
2749 static char *archpat_auto;
2756 if (!archpat_auto) {
2757 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2758 + sizeof("//auto"));
2759 New(55, archpat_auto, len, char);
2760 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2762 for (len = sizeof(ARCHNAME) + 2;
2763 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2764 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2769 /* Break at all separators */
2771 SV *libdir = newSV(0);
2774 /* skip any consecutive separators */
2775 while ( *p == PERLLIB_SEP ) {
2776 /* Uncomment the next line for PATH semantics */
2777 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2781 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2782 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2787 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2788 p = Nullch; /* break out */
2792 * BEFORE pushing libdir onto @INC we may first push version- and
2793 * archname-specific sub-directories.
2796 struct stat tmpstatbuf;
2801 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2803 while (unix[len-1] == '/') len--; /* Cosmetic */
2804 sv_usepvn(libdir,unix,len);
2807 PerlIO_printf(PerlIO_stderr(),
2808 "Failed to unixify @INC element \"%s\"\n",
2811 /* .../archname/version if -d .../archname/version/auto */
2812 sv_setsv(subdir, libdir);
2813 sv_catpv(subdir, archpat_auto);
2814 if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2815 S_ISDIR(tmpstatbuf.st_mode))
2816 av_push(GvAVn(incgv),
2817 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2819 /* .../archname if -d .../archname/auto */
2820 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2821 strlen(patchlevel) + 1, "", 0);
2822 if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2823 S_ISDIR(tmpstatbuf.st_mode))
2824 av_push(GvAVn(incgv),
2825 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2828 /* finally push this lib directory on the end of @INC */
2829 av_push(GvAVn(incgv), libdir);
2832 SvREFCNT_dec(subdir);
2836 static struct thread *
2842 Newz(53, thr, 1, struct thread);
2843 curcop = &compiling;
2844 thr->cvcache = newHV();
2845 thr->magicals = newAV();
2846 thr->specific = newAV();
2847 thr->flags = THRf_R_JOINABLE;
2848 MUTEX_INIT(&thr->mutex);
2849 /* Handcraft thrsv similarly to mess_sv */
2850 New(53, thrsv, 1, SV);
2851 Newz(53, xpv, 1, XPV);
2852 SvFLAGS(thrsv) = SVt_PV;
2853 SvANY(thrsv) = (void*)xpv;
2854 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2855 SvPVX(thrsv) = (char*)thr;
2856 SvCUR_set(thrsv, sizeof(thr));
2857 SvLEN_set(thrsv, sizeof(thr));
2858 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2860 curcop = &compiling;
2863 MUTEX_LOCK(&threads_mutex);
2868 MUTEX_UNLOCK(&threads_mutex);
2870 #ifdef HAVE_THREAD_INTERN
2871 init_thread_intern(thr);
2873 thr->self = pthread_self();
2874 #endif /* HAVE_THREAD_INTERN */
2878 * These must come after the SET_THR because sv_setpvn does
2879 * SvTAINT and the taint fields require dTHR.
2881 toptarget = NEWSV(0,0);
2882 sv_upgrade(toptarget, SVt_PVFM);
2883 sv_setpvn(toptarget, "", 0);
2884 bodytarget = NEWSV(0,0);
2885 sv_upgrade(bodytarget, SVt_PVFM);
2886 sv_setpvn(bodytarget, "", 0);
2887 formtarget = bodytarget;
2890 #endif /* USE_THREADS */
2893 call_list(oldscope, list)
2898 line_t oldline = curcop->cop_line;
2903 while (AvFILL(list) >= 0) {
2904 CV *cv = (CV*)av_shift(list);
2912 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2913 (void)SvPV(errsv, len);
2916 curcop = &compiling;
2917 curcop->cop_line = oldline;
2918 if (list == beginav)
2919 sv_catpv(errsv, "BEGIN failed--compilation aborted");
2921 sv_catpv(errsv, "END failed--cleanup aborted");
2922 while (scopestack_ix > oldscope)
2924 croak("%s", SvPVX(errsv));
2932 /* my_exit() was called */
2933 while (scopestack_ix > oldscope)
2936 curstash = defstash;
2938 call_list(oldscope, endav);
2940 curcop = &compiling;
2941 curcop->cop_line = oldline;
2943 if (list == beginav)
2944 croak("BEGIN failed--compilation aborted");
2946 croak("END failed--cleanup aborted");
2952 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2957 curcop = &compiling;
2958 curcop->cop_line = oldline;
2972 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2973 thr, (unsigned long) status));
2974 #endif /* USE_THREADS */
2983 STATUS_NATIVE_SET(status);
2993 if (vaxc$errno & 1) {
2994 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2995 STATUS_NATIVE_SET(44);
2998 if (!vaxc$errno && errno) /* unlikely */
2999 STATUS_NATIVE_SET(44);
3001 STATUS_NATIVE_SET(vaxc$errno);
3005 STATUS_POSIX_SET(errno);
3006 else if (STATUS_POSIX == 0)
3007 STATUS_POSIX_SET(255);
3016 register CONTEXT *cx;
3025 (void)UNLINK(e_tmpname);
3026 Safefree(e_tmpname);
3030 if (cxstack_ix >= 0) {