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));
72 static void init_perllib _((void));
73 static void init_postdump_symbols _((int, char **, char **));
74 static void init_predump_symbols _((void));
75 static void my_exit_jump _((void)) __attribute__((noreturn));
76 static void nuke_stacks _((void));
77 static void open_script _((char *, bool, SV *));
78 static void usage _((char *));
79 static void validate_suid _((char *, char*));
81 static int fdscript = -1;
83 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
84 #include <asm/sigcontext.h>
86 catch_sigsegv(int signo, struct sigcontext_struct sc)
88 signal(SIGSEGV, SIG_DFL);
89 fprintf(stderr, "Segmentation fault dereferencing 0x%lx\n"
90 "return_address = 0x%lx, eip = 0x%lx\n",
91 sc.cr2, __builtin_return_address(0), sc.eip);
92 fprintf(stderr, "thread = 0x%lx\n", (unsigned long)THR);
99 PerlInterpreter *sv_interp;
102 New(53, sv_interp, 1, PerlInterpreter);
107 perl_construct( sv_interp )
108 register PerlInterpreter *sv_interp;
110 #if defined(USE_THREADS) && !defined(FAKE_THREADS)
114 if (!(curinterp = sv_interp))
118 Zero(sv_interp, 1, PerlInterpreter);
121 /* Init the real globals (and main thread)? */
127 Newz(53, thr, 1, struct thread);
128 MUTEX_INIT(&malloc_mutex);
129 MUTEX_INIT(&sv_mutex);
130 /* Safe to use SVs from now on */
131 MUTEX_INIT(&eval_mutex);
132 COND_INIT(&eval_cond);
133 MUTEX_INIT(&threads_mutex);
134 COND_INIT(&nthreads_cond);
138 thr->flags = THRf_R_JOINABLE;
139 MUTEX_INIT(&thr->mutex);
144 /* Handcraft thrsv similarly to mess_sv */
145 New(53, thrsv, 1, SV);
146 Newz(53, xpv, 1, XPV);
147 SvFLAGS(thrsv) = SVt_PV;
148 SvANY(thrsv) = (void*)xpv;
149 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
150 SvPVX(thrsv) = (char*)thr;
151 SvCUR_set(thrsv, sizeof(thr));
152 SvLEN_set(thrsv, sizeof(thr));
153 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
155 #ifdef HAVE_THREAD_INTERN
156 init_thread_intern(thr);
158 thr->self = pthread_self();
159 if (pthread_key_create(&thr_key, 0))
160 croak("panic: pthread_key_create");
161 #endif /* HAVE_THREAD_INTERN */
163 #endif /* USE_THREADS */
165 linestr = NEWSV(65,80);
166 sv_upgrade(linestr,SVt_PVIV);
168 if (!SvREADONLY(&sv_undef)) {
169 SvREADONLY_on(&sv_undef);
173 SvREADONLY_on(&sv_no);
175 sv_setpv(&sv_yes,Yes);
177 SvREADONLY_on(&sv_yes);
180 nrs = newSVpv("\n", 1);
181 rs = SvREFCNT_inc(nrs);
183 sighandlerp = sighandler;
188 * There is no way we can refer to them from Perl so close them to save
189 * space. The other alternative would be to provide STDAUX and STDPRN
192 (void)fclose(stdaux);
193 (void)fclose(stdprn);
199 perl_destruct_level = 1;
201 if(perl_destruct_level > 0)
206 lex_state = LEX_NOTPARSING;
208 start_env.je_prev = NULL;
209 start_env.je_ret = -1;
210 start_env.je_mustcatch = TRUE;
211 top_env = &start_env;
214 SET_NUMERIC_STANDARD();
215 #if defined(SUBVERSION) && SUBVERSION > 0
216 sprintf(patchlevel, "%7.5f", (double) 5
217 + ((double) PATCHLEVEL / (double) 1000)
218 + ((double) SUBVERSION / (double) 100000));
220 sprintf(patchlevel, "%5.3f", (double) 5 +
221 ((double) PATCHLEVEL / (double) 1000));
224 #if defined(LOCAL_PATCH_COUNT)
225 localpatches = local_patches; /* For possible -v */
228 PerlIO_init(); /* Hook to IO system */
230 fdpid = newAV(); /* for remembering popen pids by fd */
234 New(51,debname,128,char);
235 New(52,debdelim,128,char);
242 perl_destruct(sv_interp)
243 register PerlInterpreter *sv_interp;
246 int destruct_level; /* 0=none, 1=full, 2=full with checks */
251 #endif /* USE_THREADS */
253 if (!(curinterp = sv_interp))
258 /* Pass 1 on any remaining threads: detach joinables, join zombies */
260 MUTEX_LOCK(&threads_mutex);
261 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
262 "perl_destruct: waiting for %d threads...\n",
264 for (t = thr->next; t != thr; t = t->next) {
265 MUTEX_LOCK(&t->mutex);
266 switch (ThrSTATE(t)) {
269 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
270 "perl_destruct: joining zombie %p\n", t));
271 ThrSETSTATE(t, THRf_DEAD);
272 MUTEX_UNLOCK(&t->mutex);
275 * The SvREFCNT_dec below may take a long time (e.g. av
276 * may contain an object scalar whose destructor gets
277 * called) so we have to unlock threads_mutex and start
280 MUTEX_UNLOCK(&threads_mutex);
282 SvREFCNT_dec((SV*)av);
283 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
284 "perl_destruct: joined zombie %p OK\n", t));
286 case THRf_R_JOINABLE:
287 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
288 "perl_destruct: detaching thread %p\n", t));
289 ThrSETSTATE(t, THRf_R_DETACHED);
291 * We unlock threads_mutex and t->mutex in the opposite order
292 * from which we locked them just so that DETACH won't
293 * deadlock if it panics. It's only a breach of good style
294 * not a bug since they are unlocks not locks.
296 MUTEX_UNLOCK(&threads_mutex);
298 MUTEX_UNLOCK(&t->mutex);
301 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
302 "perl_destruct: ignoring %p (state %u)\n",
304 MUTEX_UNLOCK(&t->mutex);
305 /* fall through and out */
308 /* We leave the above "Pass 1" loop with threads_mutex still locked */
310 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
313 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
314 "perl_destruct: final wait for %d threads\n",
316 COND_WAIT(&nthreads_cond, &threads_mutex);
318 /* At this point, we're the last thread */
319 MUTEX_UNLOCK(&threads_mutex);
320 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
321 MUTEX_DESTROY(&threads_mutex);
322 COND_DESTROY(&nthreads_cond);
323 #endif /* !defined(FAKE_THREADS) */
324 #endif /* USE_THREADS */
326 destruct_level = perl_destruct_level;
330 if (s = getenv("PERL_DESTRUCT_LEVEL")) {
332 if (destruct_level < i)
341 /* We must account for everything. */
343 /* Destroy the main CV and syntax tree */
345 curpad = AvARRAY(comppad);
350 SvREFCNT_dec(main_cv);
355 * Try to destruct global references. We do this first so that the
356 * destructors and destructees still exist. Some sv's might remain.
357 * Non-referenced objects are on their own.
364 /* unhook hooks which will soon be, or use, destroyed data */
365 SvREFCNT_dec(warnhook);
367 SvREFCNT_dec(diehook);
369 SvREFCNT_dec(parsehook);
372 if (destruct_level == 0){
374 DEBUG_P(debprofdump());
376 /* The exit() function will do everything that needs doing. */
380 /* loosen bonds of global variables */
383 (void)PerlIO_close(rsfp);
387 /* Filters for program text */
388 SvREFCNT_dec(rsfp_filters);
389 rsfp_filters = Nullav;
401 sawampersand = FALSE; /* must save all match strings */
402 sawstudy = FALSE; /* do fbm_instr on all strings */
417 /* magical thingies */
419 Safefree(ofs); /* $, */
422 Safefree(ors); /* $\ */
425 SvREFCNT_dec(nrs); /* $\ helper */
428 multiline = 0; /* $* */
430 SvREFCNT_dec(statname);
434 /* defgv, aka *_ should be taken care of elsewhere */
436 #if 0 /* just about all regexp stuff, seems to be ok */
438 /* shortcuts to regexp stuff */
443 SAVEFREEOP(oldlastpm); /* for saving regexp context during debugger */
445 regprecomp = NULL; /* uncompiled string. */
446 regparse = NULL; /* Input-scan pointer. */
447 regxend = NULL; /* End of input for compile */
448 regnpar = 0; /* () count. */
449 regcode = NULL; /* Code-emit pointer; ®dummy = don't. */
450 regsize = 0; /* Code size. */
451 regnaughty = 0; /* How bad is this pattern? */
452 regsawback = 0; /* Did we see \1, ...? */
454 reginput = NULL; /* String-input pointer. */
455 regbol = NULL; /* Beginning of input, for ^ check. */
456 regeol = NULL; /* End of input, for $ check. */
457 regstartp = (char **)NULL; /* Pointer to startp array. */
458 regendp = (char **)NULL; /* Ditto for endp. */
459 reglastparen = 0; /* Similarly for lastparen. */
460 regtill = NULL; /* How far we are required to go. */
461 regflags = 0; /* are we folding, multilining? */
462 regprev = (char)NULL; /* char before regbol, \n if none */
466 /* clean up after study() */
467 SvREFCNT_dec(lastscream);
469 Safefree(screamfirst);
471 Safefree(screamnext);
474 /* startup and shutdown function lists */
475 SvREFCNT_dec(beginav);
477 SvREFCNT_dec(initav);
482 /* temp stack during pp_sort() */
483 SvREFCNT_dec(sortstack);
486 /* shortcuts just get cleared */
496 /* reset so print() ends up where we expect */
499 /* Prepare to destruct main symbol table. */
506 if (destruct_level >= 2) {
507 if (scopestack_ix != 0)
508 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
509 (long)scopestack_ix);
510 if (savestack_ix != 0)
511 warn("Unbalanced saves: %ld more saves than restores\n",
513 if (tmps_floor != -1)
514 warn("Unbalanced tmps: %ld more allocs than frees\n",
515 (long)tmps_floor + 1);
516 if (cxstack_ix != -1)
517 warn("Unbalanced context: %ld more PUSHes than POPs\n",
518 (long)cxstack_ix + 1);
521 /* Now absolutely destruct everything, somehow or other, loops or no. */
523 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
524 while (sv_count != 0 && sv_count != last_sv_count) {
525 last_sv_count = sv_count;
528 SvFLAGS(strtab) &= ~SVTYPEMASK;
529 SvFLAGS(strtab) |= SVt_PVHV;
531 /* Destruct the global string table. */
533 /* Yell and reset the HeVAL() slots that are still holding refcounts,
534 * so that sv_free() won't fail on them.
543 array = HvARRAY(strtab);
547 warn("Unbalanced string table refcount: (%d) for \"%s\"",
548 HeVAL(hent) - Nullsv, HeKEY(hent));
549 HeVAL(hent) = Nullsv;
559 SvREFCNT_dec(strtab);
562 warn("Scalars leaked: %ld\n", (long)sv_count);
566 /* No SVs have survived, need to clean out */
570 Safefree(origfilename);
572 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
574 DEBUG_P(debprofdump());
576 MUTEX_DESTROY(&sv_mutex);
577 MUTEX_DESTROY(&malloc_mutex);
578 MUTEX_DESTROY(&eval_mutex);
579 COND_DESTROY(&eval_cond);
581 /* As the penultimate thing, free the non-arena SV for thrsv */
582 Safefree(SvPVX(thrsv));
583 Safefree(SvANY(thrsv));
586 #endif /* USE_THREADS */
588 /* As the absolutely last thing, free the non-arena SV for mess() */
591 /* we know that type >= SVt_PV */
593 Safefree(SvPVX(mess_sv));
594 Safefree(SvANY(mess_sv));
602 PerlInterpreter *sv_interp;
604 if (!(curinterp = sv_interp))
610 perl_parse(sv_interp, xsinit, argc, argv, env)
611 PerlInterpreter *sv_interp;
612 void (*xsinit)_((void));
620 char *scriptname = NULL;
621 VOL bool dosearch = FALSE;
628 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
631 croak("suidperl is no longer needed since the kernel can now execute\n\
632 setuid perl scripts securely.\n");
636 if (!(curinterp = sv_interp))
639 #if defined(NeXT) && defined(__DYNAMIC__)
640 _dyld_lookup_and_bind
641 ("__environ", (unsigned long *) &environ_pointer, NULL);
646 #ifndef VMS /* VMS doesn't have environ array */
647 origenviron = environ;
653 /* Come here if running an undumped a.out. */
655 origfilename = savepv(argv[0]);
657 cxstack_ix = -1; /* start label stack again */
659 init_postdump_symbols(argc,argv,env);
664 curpad = AvARRAY(comppad);
669 SvREFCNT_dec(main_cv);
673 oldscope = scopestack_ix;
681 /* my_exit() was called */
682 while (scopestack_ix > oldscope)
687 call_list(oldscope, endav);
689 return STATUS_NATIVE_EXPORT;
692 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
696 sv_setpvn(linestr,"",0);
697 sv = newSVpv("",0); /* first used for -I flags */
701 for (argc--,argv++; argc > 0; argc--,argv++) {
702 if (argv[0][0] != '-' || !argv[0][1])
706 validarg = " PHOOEY ";
731 if (s = moreswitches(s))
741 if (euid != uid || egid != gid)
742 croak("No -e allowed in setuid scripts");
744 e_tmpname = savepv(TMPPATH);
745 (void)mktemp(e_tmpname);
747 croak("Can't mktemp()");
748 e_fp = PerlIO_open(e_tmpname,"w");
750 croak("Cannot open temporary file");
755 PerlIO_puts(e_fp,argv[1]);
759 croak("No code specified for -e");
760 (void)PerlIO_putc(e_fp,'\n');
762 case 'I': /* -I handled both here and in moreswitches() */
764 if (!*++s && (s=argv[1]) != Nullch) {
767 while (s && isSPACE(*s))
771 for (e = s; *e && !isSPACE(*e); e++) ;
778 } /* XXX else croak? */
792 preambleav = newAV();
793 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
795 Sv = newSVpv("print myconfig();",0);
797 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
799 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
801 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
802 sv_catpv(Sv,"\" Compile-time options:");
804 sv_catpv(Sv," DEBUGGING");
807 sv_catpv(Sv," NO_EMBED");
810 sv_catpv(Sv," MULTIPLICITY");
812 sv_catpv(Sv,"\\n\",");
814 #if defined(LOCAL_PATCH_COUNT)
815 if (LOCAL_PATCH_COUNT > 0) {
817 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
818 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
820 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
824 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
827 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
829 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
834 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
835 print \" \\%ENV:\\n @env\\n\" if @env; \
836 print \" \\@INC:\\n @INC\\n\";");
839 Sv = newSVpv("config_vars(qw(",0);
844 av_push(preambleav, Sv);
845 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
856 if (!*++s || isSPACE(*s)) {
860 /* catch use of gnu style long options */
861 if (strEQ(s, "version")) {
865 if (strEQ(s, "help")) {
872 croak("Unrecognized switch: -%s (-h will show valid options)",s);
877 if (!tainting && (s = getenv("PERL5OPT"))) {
888 if (!strchr("DIMUdmw", *s))
889 croak("Illegal switch in PERL5OPT: -%c", *s);
895 scriptname = argv[0];
897 if (PerlIO_flush(e_fp) || PerlIO_error(e_fp) || PerlIO_close(e_fp)) {
899 warn("Did you forget to compile with -DMULTIPLICITY?");
901 croak("Can't write to temp file for -e: %s", Strerror(errno));
905 scriptname = e_tmpname;
907 else if (scriptname == Nullch) {
909 if ( isatty(PerlIO_fileno(PerlIO_stdin())) )
917 open_script(scriptname,dosearch,sv);
919 validate_suid(validarg, scriptname);
924 main_cv = compcv = (CV*)NEWSV(1104,0);
925 sv_upgrade((SV *)compcv, SVt_PVCV);
929 av_push(comppad, Nullsv);
930 curpad = AvARRAY(comppad);
931 comppad_name = newAV();
932 comppad_name_fill = 0;
933 min_intro_pending = 0;
936 av_store(comppad_name, 0, newSVpv("@_", 2));
937 curpad[0] = (SV*)newAV();
938 SvPADMY_on(curpad[0]); /* XXX Needed? */
940 New(666, CvMUTEXP(compcv), 1, perl_mutex);
941 MUTEX_INIT(CvMUTEXP(compcv));
942 #endif /* USE_THREADS */
944 comppadlist = newAV();
945 AvREAL_off(comppadlist);
946 av_store(comppadlist, 0, (SV*)comppad_name);
947 av_store(comppadlist, 1, (SV*)comppad);
948 CvPADLIST(compcv) = comppadlist;
950 boot_core_UNIVERSAL();
952 (*xsinit)(); /* in case linked C routines want magical variables */
953 #if defined(VMS) || defined(WIN32)
957 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
958 DEBUG_L(signal(SIGSEGV, (void(*)(int))catch_sigsegv););
961 init_predump_symbols();
963 init_postdump_symbols(argc,argv,env);
967 /* now parse the script */
970 if (yyparse() || error_count) {
972 croak("%s had compilation errors.\n", origfilename);
974 croak("Execution of %s aborted due to compilation errors.\n",
978 curcop->cop_line = 0;
982 (void)UNLINK(e_tmpname);
987 /* now that script is parsed, we can modify record separator */
989 rs = SvREFCNT_inc(nrs);
990 sv_setsv(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), rs);
1002 if ((s=getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1003 dump_mstats("after compilation:");
1014 PerlInterpreter *sv_interp;
1021 if (!(curinterp = sv_interp))
1024 oldscope = scopestack_ix;
1029 cxstack_ix = -1; /* start context stack again */
1032 /* my_exit() was called */
1033 while (scopestack_ix > oldscope)
1036 curstash = defstash;
1038 call_list(oldscope, endav);
1040 if (getenv("PERL_DEBUG_MSTATS"))
1041 dump_mstats("after execution: ");
1044 return STATUS_NATIVE_EXPORT;
1047 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1052 if (curstack != mainstack) {
1054 SWITCHSTACK(curstack, mainstack);
1059 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1060 sawampersand ? "Enabling" : "Omitting"));
1063 DEBUG_x(dump_all());
1064 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1066 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1067 (unsigned long) thr));
1068 #endif /* USE_THREADS */
1071 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1074 if (PERLDB_SINGLE && DBsingle)
1075 sv_setiv(DBsingle, 1);
1077 call_list(oldscope, initav);
1087 else if (main_start) {
1088 CvDEPTH(main_cv) = 1;
1099 perl_get_sv(name, create)
1103 GV* gv = gv_fetchpv(name, create, SVt_PV);
1110 perl_get_av(name, create)
1114 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1123 perl_get_hv(name, create)
1127 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1136 perl_get_cv(name, create)
1140 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1141 if (create && !GvCVu(gv))
1142 return newSUB(start_subparse(FALSE, 0),
1143 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1151 /* Be sure to refetch the stack pointer after calling these routines. */
1154 perl_call_argv(subname, flags, argv)
1156 I32 flags; /* See G_* flags in cop.h */
1157 register char **argv; /* null terminated arg list */
1165 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1170 return perl_call_pv(subname, flags);
1174 perl_call_pv(subname, flags)
1175 char *subname; /* name of the subroutine */
1176 I32 flags; /* See G_* flags in cop.h */
1178 return perl_call_sv((SV*)perl_get_cv(subname, TRUE), flags);
1182 perl_call_method(methname, flags)
1183 char *methname; /* name of the subroutine */
1184 I32 flags; /* See G_* flags in cop.h */
1191 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1194 return perl_call_sv(*stack_sp--, flags);
1197 /* May be called with any of a CV, a GV, or an SV containing the name. */
1199 perl_call_sv(sv, flags)
1201 I32 flags; /* See G_* flags in cop.h */
1204 LOGOP myop; /* fake syntax tree node */
1210 bool oldcatch = CATCH_GET;
1215 if (flags & G_DISCARD) {
1220 Zero(&myop, 1, LOGOP);
1221 myop.op_next = Nullop;
1222 if (!(flags & G_NOARGS))
1223 myop.op_flags |= OPf_STACKED;
1224 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1225 (flags & G_ARRAY) ? OPf_WANT_LIST :
1230 EXTEND(stack_sp, 1);
1233 oldscope = scopestack_ix;
1235 if (PERLDB_SUB && curstash != debstash
1236 /* Handle first BEGIN of -d. */
1237 && (DBcv || (DBcv = GvCV(DBsub)))
1238 /* Try harder, since this may have been a sighandler, thus
1239 * curstash may be meaningless. */
1240 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash))
1241 op->op_private |= OPpENTERSUB_DB;
1243 if (flags & G_EVAL) {
1244 cLOGOP->op_other = op;
1246 /* we're trying to emulate pp_entertry() here */
1248 register CONTEXT *cx;
1249 I32 gimme = GIMME_V;
1254 push_return(op->op_next);
1255 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1257 eval_root = op; /* Only needed so that goto works right. */
1260 if (flags & G_KEEPERR)
1263 sv_setpv(GvSV(errgv),"");
1275 /* my_exit() was called */
1276 curstash = defstash;
1280 croak("Callback called exit");
1289 stack_sp = stack_base + oldmark;
1290 if (flags & G_ARRAY)
1294 *++stack_sp = &sv_undef;
1302 if (op == (OP*)&myop)
1303 op = pp_entersub(ARGS);
1306 retval = stack_sp - (stack_base + oldmark);
1307 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1308 sv_setpv(GvSV(errgv),"");
1311 if (flags & G_EVAL) {
1312 if (scopestack_ix > oldscope) {
1316 register CONTEXT *cx;
1328 CATCH_SET(oldcatch);
1330 if (flags & G_DISCARD) {
1331 stack_sp = stack_base + oldmark;
1340 /* Eval a string. The G_EVAL flag is always assumed. */
1343 perl_eval_sv(sv, flags)
1345 I32 flags; /* See G_* flags in cop.h */
1348 UNOP myop; /* fake syntax tree node */
1350 I32 oldmark = sp - stack_base;
1357 if (flags & G_DISCARD) {
1365 EXTEND(stack_sp, 1);
1367 oldscope = scopestack_ix;
1369 if (!(flags & G_NOARGS))
1370 myop.op_flags = OPf_STACKED;
1371 myop.op_next = Nullop;
1372 myop.op_type = OP_ENTEREVAL;
1373 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1374 (flags & G_ARRAY) ? OPf_WANT_LIST :
1376 if (flags & G_KEEPERR)
1377 myop.op_flags |= OPf_SPECIAL;
1387 /* my_exit() was called */
1388 curstash = defstash;
1392 croak("Callback called exit");
1401 stack_sp = stack_base + oldmark;
1402 if (flags & G_ARRAY)
1406 *++stack_sp = &sv_undef;
1411 if (op == (OP*)&myop)
1412 op = pp_entereval(ARGS);
1415 retval = stack_sp - (stack_base + oldmark);
1416 if (!(flags & G_KEEPERR))
1417 sv_setpv(GvSV(errgv),"");
1421 if (flags & G_DISCARD) {
1422 stack_sp = stack_base + oldmark;
1432 perl_eval_pv(p, croak_on_error)
1438 SV* sv = newSVpv(p, 0);
1441 perl_eval_sv(sv, G_SCALAR);
1448 if (croak_on_error && SvTRUE(GvSV(errgv)))
1449 croak(SvPVx(GvSV(errgv), na));
1454 /* Require a module. */
1460 SV* sv = sv_newmortal();
1461 sv_setpv(sv, "require '");
1464 perl_eval_sv(sv, G_DISCARD);
1468 magicname(sym,name,namlen)
1475 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1476 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1480 usage(name) /* XXX move this out into a module ? */
1483 /* This message really ought to be max 23 lines.
1484 * Removed -h because the user already knows that opton. Others? */
1486 static char *usage[] = {
1487 "-0[octal] specify record separator (\\0, if no argument)",
1488 "-a autosplit mode with -n or -p (splits $_ into @F)",
1489 "-c check syntax only (runs BEGIN and END blocks)",
1490 "-d[:debugger] run scripts under debugger",
1491 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1492 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1493 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1494 "-i[extension] edit <> files in place (make backup if extension supplied)",
1495 "-Idirectory specify @INC/#include directory (may be used more than once)",
1496 "-l[octal] enable line ending processing, specifies line terminator",
1497 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1498 "-n assume 'while (<>) { ... }' loop around your script",
1499 "-p assume loop like -n but print line also like sed",
1500 "-P run script through C preprocessor before compilation",
1501 "-s enable some switch parsing for switches after script name",
1502 "-S look for the script using PATH environment variable",
1503 "-T turn on tainting checks",
1504 "-u dump core after parsing script",
1505 "-U allow unsafe operations",
1506 "-v print version number and patchlevel of perl",
1507 "-V[:variable] print perl configuration information",
1508 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1509 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1515 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1517 printf("\n %s", *p++);
1520 /* This routine handles any switches that can be given during run */
1531 rschar = scan_oct(s, 4, &numlen);
1533 if (rschar & ~((U8)~0))
1535 else if (!rschar && numlen >= 2)
1536 nrs = newSVpv("", 0);
1539 nrs = newSVpv(&ch, 1);
1544 splitstr = savepv(s + 1);
1558 if (*s == ':' || *s == '=') {
1559 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1563 perldb = PERLDB_ALL;
1570 if (isALPHA(s[1])) {
1571 static char debopts[] = "psltocPmfrxuLHXD";
1574 for (s++; *s && (d = strchr(debopts,*s)); s++)
1575 debug |= 1 << (d - debopts);
1579 for (s++; isDIGIT(*s); s++) ;
1581 debug |= 0x80000000;
1583 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1584 for (s++; isALNUM(*s); s++) ;
1594 inplace = savepv(s+1);
1596 for (s = inplace; *s && !isSPACE(*s); s++) ;
1600 case 'I': /* -I handled both here and in parse_perl() */
1603 while (*s && isSPACE(*s))
1607 for (e = s; *e && !isSPACE(*e); e++) ;
1608 p = savepvn(s, e-s);
1614 croak("No space allowed after -I");
1624 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1633 ors = SvPV(nrs, orslen);
1634 ors = savepvn(ors, orslen);
1638 forbid_setid("-M"); /* XXX ? */
1641 forbid_setid("-m"); /* XXX ? */
1646 /* -M-foo == 'no foo' */
1647 if (*s == '-') { use = "no "; ++s; }
1648 sv = newSVpv(use,0);
1650 /* We allow -M'Module qw(Foo Bar)' */
1651 while(isALNUM(*s) || *s==':') ++s;
1653 sv_catpv(sv, start);
1654 if (*(start-1) == 'm') {
1656 croak("Can't use '%c' after -mname", *s);
1657 sv_catpv( sv, " ()");
1660 sv_catpvn(sv, start, s-start);
1661 sv_catpv(sv, " split(/,/,q{");
1666 if (preambleav == NULL)
1667 preambleav = newAV();
1668 av_push(preambleav, sv);
1671 croak("No space allowed after -%c", *(s-1));
1688 croak("Too late for \"-T\" option");
1700 #if defined(SUBVERSION) && SUBVERSION > 0
1701 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1702 PATCHLEVEL, SUBVERSION, ARCHNAME);
1704 printf("\nThis is perl, version %s built for %s",
1705 patchlevel, ARCHNAME);
1707 #if defined(LOCAL_PATCH_COUNT)
1708 if (LOCAL_PATCH_COUNT > 0)
1709 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1710 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1713 printf("\n\nCopyright 1987-1997, Larry Wall\n");
1715 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1718 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1721 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1722 "Version 5 port Copyright (c) 1994-1997, Andreas Kaiser, Ilya Zakharevich\n");
1725 printf("atariST series port, ++jrb bammi@cadence.com\n");
1728 Perl may be copied only under the terms of either the Artistic License or the\n\
1729 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n");
1737 if (s[1] == '-') /* Additional switches on #! line. */
1745 #ifdef ALTERNATE_SHEBANG
1746 case 'S': /* OS/2 needs -S on "extproc" line. */
1754 croak("Can't emulate -%.1s on #! line",s);
1759 /* compliments of Tom Christiansen */
1761 /* unexec() can be found in the Gnu emacs distribution */
1772 prog = newSVpv(BIN_EXP);
1773 sv_catpv(prog, "/perl");
1774 file = newSVpv(origfilename);
1775 sv_catpv(file, ".perldump");
1777 status = unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1779 PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n",
1780 SvPVX(prog), SvPVX(file));
1784 # include <lib$routines.h>
1785 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1787 ABORT(); /* for use with undump */
1798 /* Note that strtab is a rather special HV. Assumptions are made
1799 about not iterating on it, and not adding tie magic to it.
1800 It is properly deallocated in perl_destruct() */
1802 HvSHAREKEYS_off(strtab); /* mandatory */
1803 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1804 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1806 curstash = defstash = newHV();
1807 curstname = newSVpv("main",4);
1808 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1809 SvREFCNT_dec(GvHV(gv));
1810 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1812 HvNAME(defstash) = savepv("main");
1813 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1815 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1816 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1818 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1819 sv_grow(GvSV(errgv), 240); /* Preallocate - for immediate signals. */
1820 sv_setpvn(GvSV(errgv), "", 0);
1821 curstash = defstash;
1822 compiling.cop_stash = defstash;
1823 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1824 /* We must init $/ before switches are processed. */
1825 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1828 #ifdef CAN_PROTOTYPE
1830 open_script(char *scriptname, bool dosearch, SV *sv)
1833 open_script(scriptname,dosearch,sv)
1840 char *xfound = Nullch;
1841 char *xfailed = Nullch;
1845 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
1846 # define SEARCH_EXTS ".bat", ".cmd", NULL
1847 # define MAX_EXT_LEN 4
1850 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
1851 # define MAX_EXT_LEN 4
1854 # define SEARCH_EXTS ".pl", ".com", NULL
1855 # define MAX_EXT_LEN 4
1857 /* additional extensions to try in each dir if scriptname not found */
1859 char *ext[] = { SEARCH_EXTS };
1860 int extidx = 0, i = 0;
1861 char *curext = Nullch;
1863 # define MAX_EXT_LEN 0
1867 * If dosearch is true and if scriptname does not contain path
1868 * delimiters, search the PATH for scriptname.
1870 * If SEARCH_EXTS is also defined, will look for each
1871 * scriptname{SEARCH_EXTS} whenever scriptname is not found
1872 * while searching the PATH.
1874 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
1875 * proceeds as follows:
1877 * + look for ./scriptname{,.foo,.bar}
1878 * + search the PATH for scriptname{,.foo,.bar}
1881 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
1882 * this will not look in '.' if it's not in the PATH)
1887 int hasdir, idx = 0, deftypes = 1;
1890 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
1891 /* The first time through, just add SEARCH_EXTS to whatever we
1892 * already have, so we can check for default file types. */
1894 (!hasdir && my_trnlnm("DCL$PATH",tokenbuf,idx++)) )
1900 if ((strlen(tokenbuf) + strlen(scriptname)
1901 + MAX_EXT_LEN) >= sizeof tokenbuf)
1902 continue; /* don't search dir with too-long name */
1903 strcat(tokenbuf, scriptname);
1907 if (strEQ(scriptname, "-"))
1909 if (dosearch) { /* Look in '.' first. */
1910 char *cur = scriptname;
1912 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
1914 if (strEQ(ext[i++],curext)) {
1915 extidx = -1; /* already has an ext */
1920 DEBUG_p(PerlIO_printf(Perl_debug_log,
1921 "Looking for %s\n",cur));
1922 if (Stat(cur,&statbuf) >= 0) {
1930 if (cur == scriptname) {
1931 len = strlen(scriptname);
1932 if (len+MAX_EXT_LEN+1 >= sizeof(tokenbuf))
1934 cur = strcpy(tokenbuf, scriptname);
1936 } while (extidx >= 0 && ext[extidx] /* try an extension? */
1937 && strcpy(tokenbuf+len, ext[extidx++]));
1942 if (dosearch && !strchr(scriptname, '/')
1944 && !strchr(scriptname, '\\')
1946 && (s = getenv("PATH"))) {
1949 bufend = s + strlen(s);
1950 while (s < bufend) {
1951 #if defined(atarist) || defined(DOSISH)
1956 && *s != ';'; len++, s++) {
1957 if (len < sizeof tokenbuf)
1960 if (len < sizeof tokenbuf)
1961 tokenbuf[len] = '\0';
1962 #else /* ! (atarist || DOSISH) */
1963 s = delimcpy(tokenbuf, tokenbuf + sizeof tokenbuf, s, bufend,
1966 #endif /* ! (atarist || DOSISH) */
1969 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tokenbuf)
1970 continue; /* don't search dir with too-long name */
1972 #if defined(atarist) || defined(DOSISH)
1973 && tokenbuf[len - 1] != '/'
1974 && tokenbuf[len - 1] != '\\'
1977 tokenbuf[len++] = '/';
1978 if (len == 2 && tokenbuf[0] == '.')
1980 (void)strcpy(tokenbuf + len, scriptname);
1984 len = strlen(tokenbuf);
1985 if (extidx > 0) /* reset after previous loop */
1989 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tokenbuf));
1990 retval = Stat(tokenbuf,&statbuf);
1992 } while ( retval < 0 /* not there */
1993 && extidx>=0 && ext[extidx] /* try an extension? */
1994 && strcpy(tokenbuf+len, ext[extidx++])
1999 if (S_ISREG(statbuf.st_mode)
2000 && cando(S_IRUSR,TRUE,&statbuf)
2002 && cando(S_IXUSR,TRUE,&statbuf)
2006 xfound = tokenbuf; /* bingo! */
2010 xfailed = savepv(tokenbuf);
2013 if (!xfound && !seen_dot && !xfailed && (Stat(scriptname,&statbuf) < 0))
2015 seen_dot = 1; /* Disable message. */
2017 croak("Can't %s %s%s%s",
2018 (xfailed ? "execute" : "find"),
2019 (xfailed ? xfailed : scriptname),
2020 (xfailed ? "" : " on PATH"),
2021 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2024 scriptname = xfound;
2027 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2028 char *s = scriptname + 8;
2037 origfilename = savepv(e_tmpname ? "-e" : scriptname);
2038 curcop->cop_filegv = gv_fetchfile(origfilename);
2039 if (strEQ(origfilename,"-"))
2041 if (fdscript >= 0) {
2042 rsfp = PerlIO_fdopen(fdscript,"r");
2043 #if defined(HAS_FCNTL) && defined(F_SETFD)
2045 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2048 else if (preprocess) {
2049 char *cpp_cfg = CPPSTDIN;
2050 SV *cpp = NEWSV(0,0);
2051 SV *cmd = NEWSV(0,0);
2053 if (strEQ(cpp_cfg, "cppstdin"))
2054 sv_catpvf(cpp, "%s/", BIN_EXP);
2055 sv_catpv(cpp, cpp_cfg);
2058 sv_catpv(sv,PRIVLIB_EXP);
2062 sed %s -e \"/^[^#]/b\" \
2063 -e \"/^#[ ]*include[ ]/b\" \
2064 -e \"/^#[ ]*define[ ]/b\" \
2065 -e \"/^#[ ]*if[ ]/b\" \
2066 -e \"/^#[ ]*ifdef[ ]/b\" \
2067 -e \"/^#[ ]*ifndef[ ]/b\" \
2068 -e \"/^#[ ]*else/b\" \
2069 -e \"/^#[ ]*elif[ ]/b\" \
2070 -e \"/^#[ ]*undef[ ]/b\" \
2071 -e \"/^#[ ]*endif/b\" \
2074 (doextract ? "-e \"1,/^#/d\n\"" : ""),
2077 %s %s -e '/^[^#]/b' \
2078 -e '/^#[ ]*include[ ]/b' \
2079 -e '/^#[ ]*define[ ]/b' \
2080 -e '/^#[ ]*if[ ]/b' \
2081 -e '/^#[ ]*ifdef[ ]/b' \
2082 -e '/^#[ ]*ifndef[ ]/b' \
2083 -e '/^#[ ]*else/b' \
2084 -e '/^#[ ]*elif[ ]/b' \
2085 -e '/^#[ ]*undef[ ]/b' \
2086 -e '/^#[ ]*endif/b' \
2094 (doextract ? "-e '1,/^#/d\n'" : ""),
2096 scriptname, cpp, sv, CPPMINUS);
2098 #ifdef IAMSUID /* actually, this is caught earlier */
2099 if (euid != uid && !euid) { /* if running suidperl */
2101 (void)seteuid(uid); /* musn't stay setuid root */
2104 (void)setreuid((Uid_t)-1, uid);
2106 #ifdef HAS_SETRESUID
2107 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
2113 if (geteuid() != uid)
2114 croak("Can't do seteuid!\n");
2116 #endif /* IAMSUID */
2117 rsfp = my_popen(SvPVX(cmd), "r");
2121 else if (!*scriptname) {
2122 forbid_setid("program input from stdin");
2123 rsfp = PerlIO_stdin();
2126 rsfp = PerlIO_open(scriptname,"r");
2127 #if defined(HAS_FCNTL) && defined(F_SETFD)
2129 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2137 #ifndef IAMSUID /* in case script is not readable before setuid */
2138 if (euid && Stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2139 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2141 execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2142 croak("Can't do setuid\n");
2146 croak("Can't open perl script \"%s\": %s\n",
2147 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2152 validate_suid(validarg, scriptname)
2158 /* do we need to emulate setuid on scripts? */
2160 /* This code is for those BSD systems that have setuid #! scripts disabled
2161 * in the kernel because of a security problem. Merely defining DOSUID
2162 * in perl will not fix that problem, but if you have disabled setuid
2163 * scripts in the kernel, this will attempt to emulate setuid and setgid
2164 * on scripts that have those now-otherwise-useless bits set. The setuid
2165 * root version must be called suidperl or sperlN.NNN. If regular perl
2166 * discovers that it has opened a setuid script, it calls suidperl with
2167 * the same argv that it had. If suidperl finds that the script it has
2168 * just opened is NOT setuid root, it sets the effective uid back to the
2169 * uid. We don't just make perl setuid root because that loses the
2170 * effective uid we had before invoking perl, if it was different from the
2173 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2174 * be defined in suidperl only. suidperl must be setuid root. The
2175 * Configure script will set this up for you if you want it.
2182 if (Fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2183 croak("Can't stat script \"%s\"",origfilename);
2184 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2188 #ifndef HAS_SETREUID
2189 /* On this access check to make sure the directories are readable,
2190 * there is actually a small window that the user could use to make
2191 * filename point to an accessible directory. So there is a faint
2192 * chance that someone could execute a setuid script down in a
2193 * non-accessible directory. I don't know what to do about that.
2194 * But I don't think it's too important. The manual lies when
2195 * it says access() is useful in setuid programs.
2197 if (access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2198 croak("Permission denied");
2200 /* If we can swap euid and uid, then we can determine access rights
2201 * with a simple stat of the file, and then compare device and
2202 * inode to make sure we did stat() on the same file we opened.
2203 * Then we just have to make sure he or she can execute it.
2206 struct stat tmpstatbuf;
2210 setreuid(euid,uid) < 0
2213 setresuid(euid,uid,(Uid_t)-1) < 0
2216 || getuid() != euid || geteuid() != uid)
2217 croak("Can't swap uid and euid"); /* really paranoid */
2218 if (Stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2219 croak("Permission denied"); /* testing full pathname here */
2220 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2221 tmpstatbuf.st_ino != statbuf.st_ino) {
2222 (void)PerlIO_close(rsfp);
2223 if (rsfp = my_popen("/bin/mail root","w")) { /* heh, heh */
2225 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2226 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2227 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2228 (long)statbuf.st_dev, (long)statbuf.st_ino,
2229 SvPVX(GvSV(curcop->cop_filegv)),
2230 (long)statbuf.st_uid, (long)statbuf.st_gid);
2231 (void)my_pclose(rsfp);
2233 croak("Permission denied\n");
2237 setreuid(uid,euid) < 0
2239 # if defined(HAS_SETRESUID)
2240 setresuid(uid,euid,(Uid_t)-1) < 0
2243 || getuid() != uid || geteuid() != euid)
2244 croak("Can't reswap uid and euid");
2245 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2246 croak("Permission denied\n");
2248 #endif /* HAS_SETREUID */
2249 #endif /* IAMSUID */
2251 if (!S_ISREG(statbuf.st_mode))
2252 croak("Permission denied");
2253 if (statbuf.st_mode & S_IWOTH)
2254 croak("Setuid/gid script is writable by world");
2255 doswitches = FALSE; /* -s is insecure in suid */
2257 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2258 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2259 croak("No #! line");
2260 s = SvPV(linestr,na)+2;
2262 while (!isSPACE(*s)) s++;
2263 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2264 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2265 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2266 croak("Not a perl script");
2267 while (*s == ' ' || *s == '\t') s++;
2269 * #! arg must be what we saw above. They can invoke it by
2270 * mentioning suidperl explicitly, but they may not add any strange
2271 * arguments beyond what #! says if they do invoke suidperl that way.
2273 len = strlen(validarg);
2274 if (strEQ(validarg," PHOOEY ") ||
2275 strnNE(s,validarg,len) || !isSPACE(s[len]))
2276 croak("Args must match #! line");
2279 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2280 euid == statbuf.st_uid)
2282 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2283 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2284 #endif /* IAMSUID */
2286 if (euid) { /* oops, we're not the setuid root perl */
2287 (void)PerlIO_close(rsfp);
2290 execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2292 croak("Can't do setuid\n");
2295 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2297 (void)setegid(statbuf.st_gid);
2300 (void)setregid((Gid_t)-1,statbuf.st_gid);
2302 #ifdef HAS_SETRESGID
2303 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2305 setgid(statbuf.st_gid);
2309 if (getegid() != statbuf.st_gid)
2310 croak("Can't do setegid!\n");
2312 if (statbuf.st_mode & S_ISUID) {
2313 if (statbuf.st_uid != euid)
2315 (void)seteuid(statbuf.st_uid); /* all that for this */
2318 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2320 #ifdef HAS_SETRESUID
2321 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2323 setuid(statbuf.st_uid);
2327 if (geteuid() != statbuf.st_uid)
2328 croak("Can't do seteuid!\n");
2330 else if (uid) { /* oops, mustn't run as root */
2332 (void)seteuid((Uid_t)uid);
2335 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2337 #ifdef HAS_SETRESUID
2338 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2344 if (geteuid() != uid)
2345 croak("Can't do seteuid!\n");
2348 if (!cando(S_IXUSR,TRUE,&statbuf))
2349 croak("Permission denied\n"); /* they can't do this */
2352 else if (preprocess)
2353 croak("-P not allowed for setuid/setgid script\n");
2354 else if (fdscript >= 0)
2355 croak("fd script not allowed in suidperl\n");
2357 croak("Script is not setuid/setgid in suidperl\n");
2359 /* We absolutely must clear out any saved ids here, so we */
2360 /* exec the real perl, substituting fd script for scriptname. */
2361 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2362 PerlIO_rewind(rsfp);
2363 lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2364 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2365 if (!origargv[which])
2366 croak("Permission denied");
2367 origargv[which] = savepv(form("/dev/fd/%d/%s",
2368 PerlIO_fileno(rsfp), origargv[which]));
2369 #if defined(HAS_FCNTL) && defined(F_SETFD)
2370 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2372 execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2373 croak("Can't do setuid\n");
2374 #endif /* IAMSUID */
2376 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2377 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2379 Fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2380 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2382 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2385 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2386 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2387 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2388 /* not set-id, must be wrapped */
2396 register char *s, *s2;
2398 /* skip forward in input to the real script? */
2402 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2403 croak("No Perl script found in input\n");
2404 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2405 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2407 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2409 while (*s == ' ' || *s == '\t') s++;
2411 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2412 if (strnEQ(s2-4,"perl",4))
2414 while (s = moreswitches(s)) ;
2416 if (cddir && chdir(cddir) < 0)
2417 croak("Can't chdir to %s",cddir);
2425 uid = (int)getuid();
2426 euid = (int)geteuid();
2427 gid = (int)getgid();
2428 egid = (int)getegid();
2433 tainting |= (uid && (euid != uid || egid != gid));
2441 croak("No %s allowed while running setuid", s);
2443 croak("No %s allowed while running setgid", s);
2450 curstash = debstash;
2451 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2453 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2454 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2455 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2456 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2457 sv_setiv(DBsingle, 0);
2458 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2459 sv_setiv(DBtrace, 0);
2460 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2461 sv_setiv(DBsignal, 0);
2462 curstash = defstash;
2470 mainstack = curstack; /* remember in case we switch stacks */
2471 AvREAL_off(curstack); /* not a real array */
2472 av_extend(curstack,127);
2474 stack_base = AvARRAY(curstack);
2475 stack_sp = stack_base;
2476 stack_max = stack_base + 127;
2478 cxstack_max = 8192 / sizeof(CONTEXT) - 2; /* Use most of 8K. */
2479 New(50,cxstack,cxstack_max + 1,CONTEXT);
2482 New(50,tmps_stack,128,SV*);
2488 * The following stacks almost certainly should be per-interpreter,
2489 * but for now they're not. XXX
2493 markstack_ptr = markstack;
2495 New(54,markstack,64,I32);
2496 markstack_ptr = markstack;
2497 markstack_max = markstack + 64;
2503 New(54,scopestack,32,I32);
2505 scopestack_max = 32;
2511 New(54,savestack,128,ANY);
2513 savestack_max = 128;
2519 New(54,retstack,16,OP*);
2530 Safefree(tmps_stack);
2537 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2546 subname = newSVpv("main",4);
2550 init_predump_symbols()
2556 sv_setpvn(GvSV(gv_fetchpv("\"", TRUE, SVt_PV)), " ", 1);
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;
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 call_list(oldscope, list)
2841 line_t oldline = curcop->cop_line;
2846 while (AvFILL(list) >= 0) {
2847 CV *cv = (CV*)av_shift(list);
2854 SV* atsv = GvSV(errgv);
2856 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2857 (void)SvPV(atsv, len);
2860 curcop = &compiling;
2861 curcop->cop_line = oldline;
2862 if (list == beginav)
2863 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2865 sv_catpv(atsv, "END failed--cleanup aborted");
2866 while (scopestack_ix > oldscope)
2868 croak("%s", SvPVX(atsv));
2876 /* my_exit() was called */
2877 while (scopestack_ix > oldscope)
2880 curstash = defstash;
2882 call_list(oldscope, endav);
2884 curcop = &compiling;
2885 curcop->cop_line = oldline;
2887 if (list == beginav)
2888 croak("BEGIN failed--compilation aborted");
2890 croak("END failed--cleanup aborted");
2896 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2901 curcop = &compiling;
2902 curcop->cop_line = oldline;
2916 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread 0x%lx, status %lu\n",
2917 (unsigned long) thr, (unsigned long) status));
2918 #endif /* USE_THREADS */
2927 STATUS_NATIVE_SET(status);
2937 if (vaxc$errno & 1) {
2938 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
2939 STATUS_NATIVE_SET(44);
2942 if (!vaxc$errno && errno) /* unlikely */
2943 STATUS_NATIVE_SET(44);
2945 STATUS_NATIVE_SET(vaxc$errno);
2949 STATUS_POSIX_SET(errno);
2950 else if (STATUS_POSIX == 0)
2951 STATUS_POSIX_SET(255);
2960 register CONTEXT *cx;
2969 (void)UNLINK(e_tmpname);
2970 Safefree(e_tmpname);
2974 if (cxstack_ix >= 0) {