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 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1820 /* We must init $/ before switches are processed. */
1821 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1824 #ifdef CAN_PROTOTYPE
1826 open_script(char *scriptname, bool dosearch, SV *sv)
1829 open_script(scriptname,dosearch,sv)
1836 char *xfound = Nullch;
1837 char *xfailed = Nullch;
1841 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
1842 # define SEARCH_EXTS ".bat", ".cmd", NULL
1843 # define MAX_EXT_LEN 4
1846 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
1847 # define MAX_EXT_LEN 4
1850 # define SEARCH_EXTS ".pl", ".com", NULL
1851 # define MAX_EXT_LEN 4
1853 /* additional extensions to try in each dir if scriptname not found */
1855 char *ext[] = { SEARCH_EXTS };
1856 int extidx = 0, i = 0;
1857 char *curext = Nullch;
1859 # define MAX_EXT_LEN 0
1863 * If dosearch is true and if scriptname does not contain path
1864 * delimiters, search the PATH for scriptname.
1866 * If SEARCH_EXTS is also defined, will look for each
1867 * scriptname{SEARCH_EXTS} whenever scriptname is not found
1868 * while searching the PATH.
1870 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
1871 * proceeds as follows:
1873 * + look for ./scriptname{,.foo,.bar}
1874 * + search the PATH for scriptname{,.foo,.bar}
1877 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
1878 * this will not look in '.' if it's not in the PATH)
1883 int hasdir, idx = 0, deftypes = 1;
1886 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
1887 /* The first time through, just add SEARCH_EXTS to whatever we
1888 * already have, so we can check for default file types. */
1890 (!hasdir && my_trnlnm("DCL$PATH",tokenbuf,idx++)) )
1896 if ((strlen(tokenbuf) + strlen(scriptname)
1897 + MAX_EXT_LEN) >= sizeof tokenbuf)
1898 continue; /* don't search dir with too-long name */
1899 strcat(tokenbuf, scriptname);
1903 if (strEQ(scriptname, "-"))
1905 if (dosearch) { /* Look in '.' first. */
1906 char *cur = scriptname;
1908 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
1910 if (strEQ(ext[i++],curext)) {
1911 extidx = -1; /* already has an ext */
1916 DEBUG_p(PerlIO_printf(Perl_debug_log,
1917 "Looking for %s\n",cur));
1918 if (Stat(cur,&statbuf) >= 0) {
1926 if (cur == scriptname) {
1927 len = strlen(scriptname);
1928 if (len+MAX_EXT_LEN+1 >= sizeof(tokenbuf))
1930 cur = strcpy(tokenbuf, scriptname);
1932 } while (extidx >= 0 && ext[extidx] /* try an extension? */
1933 && strcpy(tokenbuf+len, ext[extidx++]));
1938 if (dosearch && !strchr(scriptname, '/')
1940 && !strchr(scriptname, '\\')
1942 && (s = getenv("PATH"))) {
1945 bufend = s + strlen(s);
1946 while (s < bufend) {
1947 #if defined(atarist) || defined(DOSISH)
1952 && *s != ';'; len++, s++) {
1953 if (len < sizeof tokenbuf)
1956 if (len < sizeof tokenbuf)
1957 tokenbuf[len] = '\0';
1958 #else /* ! (atarist || DOSISH) */
1959 s = delimcpy(tokenbuf, tokenbuf + sizeof tokenbuf, s, bufend,
1962 #endif /* ! (atarist || DOSISH) */
1965 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tokenbuf)
1966 continue; /* don't search dir with too-long name */
1968 #if defined(atarist) || defined(DOSISH)
1969 && tokenbuf[len - 1] != '/'
1970 && tokenbuf[len - 1] != '\\'
1973 tokenbuf[len++] = '/';
1974 if (len == 2 && tokenbuf[0] == '.')
1976 (void)strcpy(tokenbuf + len, scriptname);
1980 len = strlen(tokenbuf);
1981 if (extidx > 0) /* reset after previous loop */
1985 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tokenbuf));
1986 retval = Stat(tokenbuf,&statbuf);
1988 } while ( retval < 0 /* not there */
1989 && extidx>=0 && ext[extidx] /* try an extension? */
1990 && strcpy(tokenbuf+len, ext[extidx++])
1995 if (S_ISREG(statbuf.st_mode)
1996 && cando(S_IRUSR,TRUE,&statbuf)
1998 && cando(S_IXUSR,TRUE,&statbuf)
2002 xfound = tokenbuf; /* bingo! */
2006 xfailed = savepv(tokenbuf);
2009 if (!xfound && !seen_dot && !xfailed && (Stat(scriptname,&statbuf) < 0))
2011 seen_dot = 1; /* Disable message. */
2013 croak("Can't %s %s%s%s",
2014 (xfailed ? "execute" : "find"),
2015 (xfailed ? xfailed : scriptname),
2016 (xfailed ? "" : " on PATH"),
2017 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2020 scriptname = xfound;
2023 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2024 char *s = scriptname + 8;
2033 origfilename = savepv(e_tmpname ? "-e" : scriptname);
2034 curcop->cop_filegv = gv_fetchfile(origfilename);
2035 if (strEQ(origfilename,"-"))
2037 if (fdscript >= 0) {
2038 rsfp = PerlIO_fdopen(fdscript,"r");
2039 #if defined(HAS_FCNTL) && defined(F_SETFD)
2041 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2044 else if (preprocess) {
2045 char *cpp_cfg = CPPSTDIN;
2046 SV *cpp = NEWSV(0,0);
2047 SV *cmd = NEWSV(0,0);
2049 if (strEQ(cpp_cfg, "cppstdin"))
2050 sv_catpvf(cpp, "%s/", BIN_EXP);
2051 sv_catpv(cpp, cpp_cfg);
2054 sv_catpv(sv,PRIVLIB_EXP);
2058 sed %s -e \"/^[^#]/b\" \
2059 -e \"/^#[ ]*include[ ]/b\" \
2060 -e \"/^#[ ]*define[ ]/b\" \
2061 -e \"/^#[ ]*if[ ]/b\" \
2062 -e \"/^#[ ]*ifdef[ ]/b\" \
2063 -e \"/^#[ ]*ifndef[ ]/b\" \
2064 -e \"/^#[ ]*else/b\" \
2065 -e \"/^#[ ]*elif[ ]/b\" \
2066 -e \"/^#[ ]*undef[ ]/b\" \
2067 -e \"/^#[ ]*endif/b\" \
2070 (doextract ? "-e \"1,/^#/d\n\"" : ""),
2073 %s %s -e '/^[^#]/b' \
2074 -e '/^#[ ]*include[ ]/b' \
2075 -e '/^#[ ]*define[ ]/b' \
2076 -e '/^#[ ]*if[ ]/b' \
2077 -e '/^#[ ]*ifdef[ ]/b' \
2078 -e '/^#[ ]*ifndef[ ]/b' \
2079 -e '/^#[ ]*else/b' \
2080 -e '/^#[ ]*elif[ ]/b' \
2081 -e '/^#[ ]*undef[ ]/b' \
2082 -e '/^#[ ]*endif/b' \
2090 (doextract ? "-e '1,/^#/d\n'" : ""),
2092 scriptname, cpp, sv, CPPMINUS);
2094 #ifdef IAMSUID /* actually, this is caught earlier */
2095 if (euid != uid && !euid) { /* if running suidperl */
2097 (void)seteuid(uid); /* musn't stay setuid root */
2100 (void)setreuid((Uid_t)-1, uid);
2102 #ifdef HAS_SETRESUID
2103 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
2109 if (geteuid() != uid)
2110 croak("Can't do seteuid!\n");
2112 #endif /* IAMSUID */
2113 rsfp = my_popen(SvPVX(cmd), "r");
2117 else if (!*scriptname) {
2118 forbid_setid("program input from stdin");
2119 rsfp = PerlIO_stdin();
2122 rsfp = PerlIO_open(scriptname,"r");
2123 #if defined(HAS_FCNTL) && defined(F_SETFD)
2125 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2133 #ifndef IAMSUID /* in case script is not readable before setuid */
2134 if (euid && Stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2135 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2137 execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2138 croak("Can't do setuid\n");
2142 croak("Can't open perl script \"%s\": %s\n",
2143 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2148 validate_suid(validarg, scriptname)
2154 /* do we need to emulate setuid on scripts? */
2156 /* This code is for those BSD systems that have setuid #! scripts disabled
2157 * in the kernel because of a security problem. Merely defining DOSUID
2158 * in perl will not fix that problem, but if you have disabled setuid
2159 * scripts in the kernel, this will attempt to emulate setuid and setgid
2160 * on scripts that have those now-otherwise-useless bits set. The setuid
2161 * root version must be called suidperl or sperlN.NNN. If regular perl
2162 * discovers that it has opened a setuid script, it calls suidperl with
2163 * the same argv that it had. If suidperl finds that the script it has
2164 * just opened is NOT setuid root, it sets the effective uid back to the
2165 * uid. We don't just make perl setuid root because that loses the
2166 * effective uid we had before invoking perl, if it was different from the
2169 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2170 * be defined in suidperl only. suidperl must be setuid root. The
2171 * Configure script will set this up for you if you want it.
2178 if (Fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2179 croak("Can't stat script \"%s\"",origfilename);
2180 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2184 #ifndef HAS_SETREUID
2185 /* On this access check to make sure the directories are readable,
2186 * there is actually a small window that the user could use to make
2187 * filename point to an accessible directory. So there is a faint
2188 * chance that someone could execute a setuid script down in a
2189 * non-accessible directory. I don't know what to do about that.
2190 * But I don't think it's too important. The manual lies when
2191 * it says access() is useful in setuid programs.
2193 if (access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2194 croak("Permission denied");
2196 /* If we can swap euid and uid, then we can determine access rights
2197 * with a simple stat of the file, and then compare device and
2198 * inode to make sure we did stat() on the same file we opened.
2199 * Then we just have to make sure he or she can execute it.
2202 struct stat tmpstatbuf;
2206 setreuid(euid,uid) < 0
2209 setresuid(euid,uid,(Uid_t)-1) < 0
2212 || getuid() != euid || geteuid() != uid)
2213 croak("Can't swap uid and euid"); /* really paranoid */
2214 if (Stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2215 croak("Permission denied"); /* testing full pathname here */
2216 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2217 tmpstatbuf.st_ino != statbuf.st_ino) {
2218 (void)PerlIO_close(rsfp);
2219 if (rsfp = my_popen("/bin/mail root","w")) { /* heh, heh */
2221 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2222 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2223 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2224 (long)statbuf.st_dev, (long)statbuf.st_ino,
2225 SvPVX(GvSV(curcop->cop_filegv)),
2226 (long)statbuf.st_uid, (long)statbuf.st_gid);
2227 (void)my_pclose(rsfp);
2229 croak("Permission denied\n");
2233 setreuid(uid,euid) < 0
2235 # if defined(HAS_SETRESUID)
2236 setresuid(uid,euid,(Uid_t)-1) < 0
2239 || getuid() != uid || geteuid() != euid)
2240 croak("Can't reswap uid and euid");
2241 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2242 croak("Permission denied\n");
2244 #endif /* HAS_SETREUID */
2245 #endif /* IAMSUID */
2247 if (!S_ISREG(statbuf.st_mode))
2248 croak("Permission denied");
2249 if (statbuf.st_mode & S_IWOTH)
2250 croak("Setuid/gid script is writable by world");
2251 doswitches = FALSE; /* -s is insecure in suid */
2253 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2254 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2255 croak("No #! line");
2256 s = SvPV(linestr,na)+2;
2258 while (!isSPACE(*s)) s++;
2259 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2260 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2261 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2262 croak("Not a perl script");
2263 while (*s == ' ' || *s == '\t') s++;
2265 * #! arg must be what we saw above. They can invoke it by
2266 * mentioning suidperl explicitly, but they may not add any strange
2267 * arguments beyond what #! says if they do invoke suidperl that way.
2269 len = strlen(validarg);
2270 if (strEQ(validarg," PHOOEY ") ||
2271 strnNE(s,validarg,len) || !isSPACE(s[len]))
2272 croak("Args must match #! line");
2275 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2276 euid == statbuf.st_uid)
2278 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2279 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2280 #endif /* IAMSUID */
2282 if (euid) { /* oops, we're not the setuid root perl */
2283 (void)PerlIO_close(rsfp);
2286 execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2288 croak("Can't do setuid\n");
2291 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2293 (void)setegid(statbuf.st_gid);
2296 (void)setregid((Gid_t)-1,statbuf.st_gid);
2298 #ifdef HAS_SETRESGID
2299 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2301 setgid(statbuf.st_gid);
2305 if (getegid() != statbuf.st_gid)
2306 croak("Can't do setegid!\n");
2308 if (statbuf.st_mode & S_ISUID) {
2309 if (statbuf.st_uid != euid)
2311 (void)seteuid(statbuf.st_uid); /* all that for this */
2314 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2316 #ifdef HAS_SETRESUID
2317 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2319 setuid(statbuf.st_uid);
2323 if (geteuid() != statbuf.st_uid)
2324 croak("Can't do seteuid!\n");
2326 else if (uid) { /* oops, mustn't run as root */
2328 (void)seteuid((Uid_t)uid);
2331 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2333 #ifdef HAS_SETRESUID
2334 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2340 if (geteuid() != uid)
2341 croak("Can't do seteuid!\n");
2344 if (!cando(S_IXUSR,TRUE,&statbuf))
2345 croak("Permission denied\n"); /* they can't do this */
2348 else if (preprocess)
2349 croak("-P not allowed for setuid/setgid script\n");
2350 else if (fdscript >= 0)
2351 croak("fd script not allowed in suidperl\n");
2353 croak("Script is not setuid/setgid in suidperl\n");
2355 /* We absolutely must clear out any saved ids here, so we */
2356 /* exec the real perl, substituting fd script for scriptname. */
2357 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2358 PerlIO_rewind(rsfp);
2359 lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2360 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2361 if (!origargv[which])
2362 croak("Permission denied");
2363 origargv[which] = savepv(form("/dev/fd/%d/%s",
2364 PerlIO_fileno(rsfp), origargv[which]));
2365 #if defined(HAS_FCNTL) && defined(F_SETFD)
2366 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2368 execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2369 croak("Can't do setuid\n");
2370 #endif /* IAMSUID */
2372 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2373 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2375 Fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2376 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2378 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2381 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2382 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2383 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2384 /* not set-id, must be wrapped */
2392 register char *s, *s2;
2394 /* skip forward in input to the real script? */
2398 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2399 croak("No Perl script found in input\n");
2400 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2401 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2403 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2405 while (*s == ' ' || *s == '\t') s++;
2407 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2408 if (strnEQ(s2-4,"perl",4))
2410 while (s = moreswitches(s)) ;
2412 if (cddir && chdir(cddir) < 0)
2413 croak("Can't chdir to %s",cddir);
2421 uid = (int)getuid();
2422 euid = (int)geteuid();
2423 gid = (int)getgid();
2424 egid = (int)getegid();
2429 tainting |= (uid && (euid != uid || egid != gid));
2437 croak("No %s allowed while running setuid", s);
2439 croak("No %s allowed while running setgid", s);
2446 curstash = debstash;
2447 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2449 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2450 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2451 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2452 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2453 sv_setiv(DBsingle, 0);
2454 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2455 sv_setiv(DBtrace, 0);
2456 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2457 sv_setiv(DBsignal, 0);
2458 curstash = defstash;
2466 mainstack = curstack; /* remember in case we switch stacks */
2467 AvREAL_off(curstack); /* not a real array */
2468 av_extend(curstack,127);
2470 stack_base = AvARRAY(curstack);
2471 stack_sp = stack_base;
2472 stack_max = stack_base + 127;
2474 cxstack_max = 8192 / sizeof(CONTEXT) - 2; /* Use most of 8K. */
2475 New(50,cxstack,cxstack_max + 1,CONTEXT);
2478 New(50,tmps_stack,128,SV*);
2484 * The following stacks almost certainly should be per-interpreter,
2485 * but for now they're not. XXX
2489 markstack_ptr = markstack;
2491 New(54,markstack,64,I32);
2492 markstack_ptr = markstack;
2493 markstack_max = markstack + 64;
2499 New(54,scopestack,32,I32);
2501 scopestack_max = 32;
2507 New(54,savestack,128,ANY);
2509 savestack_max = 128;
2515 New(54,retstack,16,OP*);
2526 Safefree(tmps_stack);
2533 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2542 subname = newSVpv("main",4);
2546 init_predump_symbols()
2553 sv_setpvn(*av_fetch(thr->magicals,find_thread_magical("\""),FALSE)," ", 1);
2555 sv_setpvn(GvSV(gv_fetchpv("\"", TRUE, SVt_PV)), " ", 1);
2556 #endif /* USE_THREADS */
2558 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2559 GvMULTI_on(stdingv);
2560 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2561 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2563 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2565 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2567 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2569 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2571 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2573 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2574 GvMULTI_on(othergv);
2575 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2576 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2578 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2580 statname = NEWSV(66,0); /* last filename we did stat on */
2583 osname = savepv(OSNAME);
2587 init_postdump_symbols(argc,argv,env)
2589 register char **argv;
2590 register char **env;
2597 argc--,argv++; /* skip name of script */
2599 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2602 if (argv[0][1] == '-') {
2606 if (s = strchr(argv[0], '=')) {
2608 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2611 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2614 toptarget = NEWSV(0,0);
2615 sv_upgrade(toptarget, SVt_PVFM);
2616 sv_setpvn(toptarget, "", 0);
2617 bodytarget = NEWSV(0,0);
2618 sv_upgrade(bodytarget, SVt_PVFM);
2619 sv_setpvn(bodytarget, "", 0);
2620 formtarget = bodytarget;
2623 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2624 sv_setpv(GvSV(tmpgv),origfilename);
2625 magicname("0", "0", 1);
2627 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2628 sv_setpv(GvSV(tmpgv),origargv[0]);
2629 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2631 (void)gv_AVadd(argvgv);
2632 av_clear(GvAVn(argvgv));
2633 for (; argc > 0; argc--,argv++) {
2634 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2637 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2641 hv_magic(hv, envgv, 'E');
2642 #ifndef VMS /* VMS doesn't have environ array */
2643 /* Note that if the supplied env parameter is actually a copy
2644 of the global environ then it may now point to free'd memory
2645 if the environment has been modified since. To avoid this
2646 problem we treat env==NULL as meaning 'use the default'
2651 environ[0] = Nullch;
2652 for (; *env; env++) {
2653 if (!(s = strchr(*env,'=')))
2659 sv = newSVpv(s--,0);
2660 (void)hv_store(hv, *env, s - *env, sv, 0);
2662 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2663 /* Sins of the RTL. See note in my_setenv(). */
2664 (void)putenv(savepv(*env));
2668 #ifdef DYNAMIC_ENV_FETCH
2669 HvNAME(hv) = savepv(ENV_HV_NAME);
2673 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2674 sv_setiv(GvSV(tmpgv), (IV)getpid());
2683 s = getenv("PERL5LIB");
2687 incpush(getenv("PERLLIB"), FALSE);
2689 /* Treat PERL5?LIB as a possible search list logical name -- the
2690 * "natural" VMS idiom for a Unix path string. We allow each
2691 * element to be a set of |-separated directories for compatibility.
2695 if (my_trnlnm("PERL5LIB",buf,0))
2696 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2698 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2702 /* Use the ~-expanded versions of APPLLIB (undocumented),
2703 ARCHLIB PRIVLIB SITEARCH SITELIB and OLDARCHLIB
2706 incpush(APPLLIB_EXP, FALSE);
2710 incpush(ARCHLIB_EXP, FALSE);
2713 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2715 incpush(PRIVLIB_EXP, FALSE);
2718 incpush(SITEARCH_EXP, FALSE);
2721 incpush(SITELIB_EXP, FALSE);
2723 #ifdef OLDARCHLIB_EXP /* 5.00[01] compatibility */
2724 incpush(OLDARCHLIB_EXP, FALSE);
2728 incpush(".", FALSE);
2732 # define PERLLIB_SEP ';'
2735 # define PERLLIB_SEP '|'
2737 # define PERLLIB_SEP ':'
2740 #ifndef PERLLIB_MANGLE
2741 # define PERLLIB_MANGLE(s,n) (s)
2745 incpush(p, addsubdirs)
2749 SV *subdir = Nullsv;
2750 static char *archpat_auto;
2757 if (!archpat_auto) {
2758 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2759 + sizeof("//auto"));
2760 New(55, archpat_auto, len, char);
2761 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2763 for (len = sizeof(ARCHNAME) + 2;
2764 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2765 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2770 /* Break at all separators */
2772 SV *libdir = newSV(0);
2775 /* skip any consecutive separators */
2776 while ( *p == PERLLIB_SEP ) {
2777 /* Uncomment the next line for PATH semantics */
2778 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2782 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2783 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2788 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2789 p = Nullch; /* break out */
2793 * BEFORE pushing libdir onto @INC we may first push version- and
2794 * archname-specific sub-directories.
2797 struct stat tmpstatbuf;
2802 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2804 while (unix[len-1] == '/') len--; /* Cosmetic */
2805 sv_usepvn(libdir,unix,len);
2808 PerlIO_printf(PerlIO_stderr(),
2809 "Failed to unixify @INC element \"%s\"\n",
2812 /* .../archname/version if -d .../archname/version/auto */
2813 sv_setsv(subdir, libdir);
2814 sv_catpv(subdir, archpat_auto);
2815 if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2816 S_ISDIR(tmpstatbuf.st_mode))
2817 av_push(GvAVn(incgv),
2818 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2820 /* .../archname if -d .../archname/auto */
2821 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2822 strlen(patchlevel) + 1, "", 0);
2823 if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2824 S_ISDIR(tmpstatbuf.st_mode))
2825 av_push(GvAVn(incgv),
2826 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2829 /* finally push this lib directory on the end of @INC */
2830 av_push(GvAVn(incgv), libdir);
2833 SvREFCNT_dec(subdir);
2837 static struct thread *
2843 Newz(53, thr, 1, struct thread);
2844 curcop = &compiling;
2845 thr->cvcache = newHV();
2846 thr->magicals = newAV();
2847 thr->specific = newAV();
2848 thr->flags = THRf_R_JOINABLE;
2849 MUTEX_INIT(&thr->mutex);
2850 /* Handcraft thrsv similarly to mess_sv */
2851 New(53, thrsv, 1, SV);
2852 Newz(53, xpv, 1, XPV);
2853 SvFLAGS(thrsv) = SVt_PV;
2854 SvANY(thrsv) = (void*)xpv;
2855 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2856 SvPVX(thrsv) = (char*)thr;
2857 SvCUR_set(thrsv, sizeof(thr));
2858 SvLEN_set(thrsv, sizeof(thr));
2859 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2861 curcop = &compiling;
2864 MUTEX_LOCK(&threads_mutex);
2869 MUTEX_UNLOCK(&threads_mutex);
2871 #ifdef INIT_THREAD_INTERN
2872 INIT_THREAD_INTERN(thr);
2874 thr->self = pthread_self();
2875 #endif /* INIT_THREAD_INTERN */
2879 * These must come after the SET_THR because sv_setpvn does
2880 * SvTAINT and the taint fields require dTHR.
2882 toptarget = NEWSV(0,0);
2883 sv_upgrade(toptarget, SVt_PVFM);
2884 sv_setpvn(toptarget, "", 0);
2885 bodytarget = NEWSV(0,0);
2886 sv_upgrade(bodytarget, SVt_PVFM);
2887 sv_setpvn(bodytarget, "", 0);
2888 formtarget = bodytarget;
2891 #endif /* USE_THREADS */
2894 call_list(oldscope, list)
2899 line_t oldline = curcop->cop_line;
2904 while (AvFILL(list) >= 0) {
2905 CV *cv = (CV*)av_shift(list);
2913 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2914 (void)SvPV(errsv, len);
2917 curcop = &compiling;
2918 curcop->cop_line = oldline;
2919 if (list == beginav)
2920 sv_catpv(errsv, "BEGIN failed--compilation aborted");
2922 sv_catpv(errsv, "END failed--cleanup aborted");
2923 while (scopestack_ix > oldscope)
2925 croak("%s", SvPVX(errsv));
2933 /* my_exit() was called */
2934 while (scopestack_ix > oldscope)
2937 curstash = defstash;
2939 call_list(oldscope, endav);
2941 curcop = &compiling;
2942 curcop->cop_line = oldline;
2944 if (list == beginav)
2945 croak("BEGIN failed--compilation aborted");
2947 croak("END failed--cleanup aborted");
2953 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2958 curcop = &compiling;
2959 curcop->cop_line = oldline;
2973 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2974 thr, (unsigned long) status));
2975 #endif /* USE_THREADS */
2984 STATUS_NATIVE_SET(status);
2994 if (vaxc$errno & 1) {
2995 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2996 STATUS_NATIVE_SET(44);
2999 if (!vaxc$errno && errno) /* unlikely */
3000 STATUS_NATIVE_SET(44);
3002 STATUS_NATIVE_SET(vaxc$errno);
3006 STATUS_POSIX_SET(errno);
3007 else if (STATUS_POSIX == 0)
3008 STATUS_POSIX_SET(255);
3017 register CONTEXT *cx;
3026 (void)UNLINK(e_tmpname);
3027 Safefree(e_tmpname);
3031 if (cxstack_ix >= 0) {