3 * Copyright (c) 1987-1998 Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
16 #include "patchlevel.h"
18 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
23 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
24 char *getenv _((char *)); /* Usually in <stdlib.h> */
27 dEXTCONST char rcsid[] = "perl.c\nPatch level: ###\n";
35 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
45 curcop = &compiling; \
52 laststype = OP_STAT; \
54 maxsysfd = MAXSYSFD; \
61 laststype = OP_STAT; \
66 static void find_beginning _((void));
67 static void forbid_setid _((char *));
68 static void incpush _((char *, int));
69 static void init_ids _((void));
70 static void init_debugger _((void));
71 static void init_lexer _((void));
72 static void init_main_stash _((void));
74 static struct perl_thread * init_main_thread _((void));
75 #endif /* USE_THREADS */
76 static void init_perllib _((void));
77 static void init_postdump_symbols _((int, char **, char **));
78 static void init_predump_symbols _((void));
79 static void my_exit_jump _((void)) __attribute__((noreturn));
80 static void nuke_stacks _((void));
81 static void open_script _((char *, bool, SV *));
82 static void usage _((char *));
83 static void validate_suid _((char *, char*));
86 static int fdscript = -1;
88 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
89 #include <asm/sigcontext.h>
91 catch_sigsegv(int signo, struct sigcontext_struct sc)
93 PerlProc_signal(SIGSEGV, SIG_DFL);
94 fprintf(stderr, "Segmentation fault dereferencing 0x%lx\n"
95 "return_address = 0x%lx, eip = 0x%lx\n",
96 sc.cr2, __builtin_return_address(0), sc.eip);
97 fprintf(stderr, "thread = 0x%lx\n", (unsigned long)THR);
102 CPerlObj* perl_alloc(IPerlMem* ipM, IPerlEnv* ipE, IPerlStdIO* ipStd,
103 IPerlLIO* ipLIO, IPerlDir* ipD, IPerlSock* ipS, IPerlProc* ipP)
105 CPerlObj* pPerl = new(ipM) CPerlObj(ipM, ipE, ipStd, ipLIO, ipD, ipS, ipP);
115 PerlInterpreter *sv_interp;
118 New(53, sv_interp, 1, PerlInterpreter);
125 CPerlObj::perl_construct(void)
127 perl_construct(register PerlInterpreter *sv_interp)
133 struct perl_thread *thr;
134 #endif /* FAKE_THREADS */
135 #endif /* USE_THREADS */
138 if (!(curinterp = sv_interp))
143 Zero(sv_interp, 1, PerlInterpreter);
146 /* Init the real globals (and main thread)? */
151 #ifdef ALLOC_THREAD_KEY
154 if (pthread_key_create(&thr_key, 0))
155 croak("panic: pthread_key_create");
157 MUTEX_INIT(&sv_mutex);
159 * Safe to use basic SV functions from now on (though
160 * not things like mortals or tainting yet).
162 MUTEX_INIT(&eval_mutex);
163 COND_INIT(&eval_cond);
164 MUTEX_INIT(&threads_mutex);
165 COND_INIT(&nthreads_cond);
167 thr = init_main_thread();
168 #endif /* USE_THREADS */
170 linestr = NEWSV(65,80);
171 sv_upgrade(linestr,SVt_PVIV);
173 if (!SvREADONLY(&sv_undef)) {
174 SvREADONLY_on(&sv_undef);
178 SvREADONLY_on(&sv_no);
180 sv_setpv(&sv_yes,Yes);
182 SvREADONLY_on(&sv_yes);
185 nrs = newSVpv("\n", 1);
186 rs = SvREFCNT_inc(nrs);
190 /* sighandlerp = sighandler; */
192 sighandlerp = sighandler;
198 * There is no way we can refer to them from Perl so close them to save
199 * space. The other alternative would be to provide STDAUX and STDPRN
202 (void)fclose(stdaux);
203 (void)fclose(stdprn);
209 perl_destruct_level = 1;
211 if(perl_destruct_level > 0)
216 lex_state = LEX_NOTPARSING;
218 start_env.je_prev = NULL;
219 start_env.je_ret = -1;
220 start_env.je_mustcatch = TRUE;
221 top_env = &start_env;
224 SET_NUMERIC_STANDARD();
225 #if defined(SUBVERSION) && SUBVERSION > 0
226 sprintf(patchlevel, "%7.5f", (double) 5
227 + ((double) PATCHLEVEL / (double) 1000)
228 + ((double) SUBVERSION / (double) 100000));
230 sprintf(patchlevel, "%5.3f", (double) 5 +
231 ((double) PATCHLEVEL / (double) 1000));
234 #if defined(LOCAL_PATCH_COUNT)
235 localpatches = local_patches; /* For possible -v */
238 PerlIO_init(); /* Hook to IO system */
240 fdpid = newAV(); /* for remembering popen pids by fd */
244 New(51,debname,128,char);
245 New(52,debdelim,128,char);
253 CPerlObj::perl_destruct(void)
255 perl_destruct(register PerlInterpreter *sv_interp)
259 int destruct_level; /* 0=none, 1=full, 2=full with checks */
264 #endif /* USE_THREADS */
267 if (!(curinterp = sv_interp))
273 /* Pass 1 on any remaining threads: detach joinables, join zombies */
275 MUTEX_LOCK(&threads_mutex);
276 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
277 "perl_destruct: waiting for %d threads...\n",
279 for (t = thr->next; t != thr; t = t->next) {
280 MUTEX_LOCK(&t->mutex);
281 switch (ThrSTATE(t)) {
284 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
285 "perl_destruct: joining zombie %p\n", t));
286 ThrSETSTATE(t, THRf_DEAD);
287 MUTEX_UNLOCK(&t->mutex);
290 * The SvREFCNT_dec below may take a long time (e.g. av
291 * may contain an object scalar whose destructor gets
292 * called) so we have to unlock threads_mutex and start
295 MUTEX_UNLOCK(&threads_mutex);
297 SvREFCNT_dec((SV*)av);
298 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
299 "perl_destruct: joined zombie %p OK\n", t));
301 case THRf_R_JOINABLE:
302 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
303 "perl_destruct: detaching thread %p\n", t));
304 ThrSETSTATE(t, THRf_R_DETACHED);
306 * We unlock threads_mutex and t->mutex in the opposite order
307 * from which we locked them just so that DETACH won't
308 * deadlock if it panics. It's only a breach of good style
309 * not a bug since they are unlocks not locks.
311 MUTEX_UNLOCK(&threads_mutex);
313 MUTEX_UNLOCK(&t->mutex);
316 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
317 "perl_destruct: ignoring %p (state %u)\n",
319 MUTEX_UNLOCK(&t->mutex);
320 /* fall through and out */
323 /* We leave the above "Pass 1" loop with threads_mutex still locked */
325 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
328 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
329 "perl_destruct: final wait for %d threads\n",
331 COND_WAIT(&nthreads_cond, &threads_mutex);
333 /* At this point, we're the last thread */
334 MUTEX_UNLOCK(&threads_mutex);
335 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
336 MUTEX_DESTROY(&threads_mutex);
337 COND_DESTROY(&nthreads_cond);
338 #endif /* !defined(FAKE_THREADS) */
339 #endif /* USE_THREADS */
341 destruct_level = perl_destruct_level;
345 if (s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL")) {
347 if (destruct_level < i)
356 /* We must account for everything. */
358 /* Destroy the main CV and syntax tree */
360 curpad = AvARRAY(comppad);
365 SvREFCNT_dec(main_cv);
370 * Try to destruct global references. We do this first so that the
371 * destructors and destructees still exist. Some sv's might remain.
372 * Non-referenced objects are on their own.
379 /* unhook hooks which will soon be, or use, destroyed data */
380 SvREFCNT_dec(warnhook);
382 SvREFCNT_dec(diehook);
384 SvREFCNT_dec(parsehook);
387 if (destruct_level == 0){
389 DEBUG_P(debprofdump());
391 /* The exit() function will do everything that needs doing. */
395 /* loosen bonds of global variables */
398 (void)PerlIO_close(rsfp);
402 /* Filters for program text */
403 SvREFCNT_dec(rsfp_filters);
404 rsfp_filters = Nullav;
416 sawampersand = FALSE; /* must save all match strings */
417 sawstudy = FALSE; /* do fbm_instr on all strings */
432 /* magical thingies */
434 Safefree(ofs); /* $, */
437 Safefree(ors); /* $\ */
440 SvREFCNT_dec(nrs); /* $\ helper */
443 multiline = 0; /* $* */
445 SvREFCNT_dec(statname);
449 /* defgv, aka *_ should be taken care of elsewhere */
451 /* clean up after study() */
452 SvREFCNT_dec(lastscream);
454 Safefree(screamfirst);
456 Safefree(screamnext);
459 /* startup and shutdown function lists */
460 SvREFCNT_dec(beginav);
462 SvREFCNT_dec(initav);
467 /* temp stack during pp_sort() */
468 SvREFCNT_dec(sortstack);
471 /* shortcuts just get cleared */
481 /* reset so print() ends up where we expect */
484 /* Prepare to destruct main symbol table. */
491 if (destruct_level >= 2) {
492 if (scopestack_ix != 0)
493 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
494 (long)scopestack_ix);
495 if (savestack_ix != 0)
496 warn("Unbalanced saves: %ld more saves than restores\n",
498 if (tmps_floor != -1)
499 warn("Unbalanced tmps: %ld more allocs than frees\n",
500 (long)tmps_floor + 1);
501 if (cxstack_ix != -1)
502 warn("Unbalanced context: %ld more PUSHes than POPs\n",
503 (long)cxstack_ix + 1);
506 /* Now absolutely destruct everything, somehow or other, loops or no. */
508 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
509 while (sv_count != 0 && sv_count != last_sv_count) {
510 last_sv_count = sv_count;
513 SvFLAGS(strtab) &= ~SVTYPEMASK;
514 SvFLAGS(strtab) |= SVt_PVHV;
516 /* Destruct the global string table. */
518 /* Yell and reset the HeVAL() slots that are still holding refcounts,
519 * so that sv_free() won't fail on them.
528 array = HvARRAY(strtab);
532 warn("Unbalanced string table refcount: (%d) for \"%s\"",
533 HeVAL(hent) - Nullsv, HeKEY(hent));
534 HeVAL(hent) = Nullsv;
544 SvREFCNT_dec(strtab);
547 warn("Scalars leaked: %ld\n", (long)sv_count);
551 /* No SVs have survived, need to clean out */
555 Safefree(origfilename);
557 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
559 DEBUG_P(debprofdump());
561 MUTEX_DESTROY(&sv_mutex);
562 MUTEX_DESTROY(&eval_mutex);
563 COND_DESTROY(&eval_cond);
565 /* As the penultimate thing, free the non-arena SV for thrsv */
566 Safefree(SvPVX(thrsv));
567 Safefree(SvANY(thrsv));
570 #endif /* USE_THREADS */
572 /* As the absolutely last thing, free the non-arena SV for mess() */
575 /* we know that type >= SVt_PV */
577 Safefree(SvPVX(mess_sv));
578 Safefree(SvANY(mess_sv));
586 CPerlObj::perl_free(void)
588 perl_free(PerlInterpreter *sv_interp)
594 if (!(curinterp = sv_interp))
602 CPerlObj::perl_parse(void (*xsinit) (CPerlObj*), int argc, char **argv, char **env)
604 perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char **argv, char **env)
610 char *scriptname = NULL;
611 VOL bool dosearch = FALSE;
618 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
621 croak("suidperl is no longer needed since the kernel can now execute\n\
622 setuid perl scripts securely.\n");
627 if (!(curinterp = sv_interp))
631 #if defined(NeXT) && defined(__DYNAMIC__)
632 _dyld_lookup_and_bind
633 ("__environ", (unsigned long *) &environ_pointer, NULL);
638 #ifndef VMS /* VMS doesn't have environ array */
639 origenviron = environ;
645 /* Come here if running an undumped a.out. */
647 origfilename = savepv(argv[0]);
649 cxstack_ix = -1; /* start label stack again */
651 init_postdump_symbols(argc,argv,env);
656 curpad = AvARRAY(comppad);
661 SvREFCNT_dec(main_cv);
665 oldscope = scopestack_ix;
673 /* my_exit() was called */
674 while (scopestack_ix > oldscope)
679 call_list(oldscope, endav);
681 return STATUS_NATIVE_EXPORT;
684 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
688 sv_setpvn(linestr,"",0);
689 sv = newSVpv("",0); /* first used for -I flags */
693 for (argc--,argv++; argc > 0; argc--,argv++) {
694 if (argv[0][0] != '-' || !argv[0][1])
698 validarg = " PHOOEY ";
723 if (s = moreswitches(s))
733 if (euid != uid || egid != gid)
734 croak("No -e allowed in setuid scripts");
736 e_tmpname = savepv(TMPPATH);
737 (void)PerlLIO_mktemp(e_tmpname);
739 croak("Can't mktemp()");
740 e_fp = PerlIO_open(e_tmpname,"w");
742 croak("Cannot open temporary file");
747 PerlIO_puts(e_fp,argv[1]);
751 croak("No code specified for -e");
752 (void)PerlIO_putc(e_fp,'\n');
754 case 'I': /* -I handled both here and in moreswitches() */
756 if (!*++s && (s=argv[1]) != Nullch) {
759 while (s && isSPACE(*s))
763 for (e = s; *e && !isSPACE(*e); e++) ;
770 } /* XXX else croak? */
784 preambleav = newAV();
785 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
787 Sv = newSVpv("print myconfig();",0);
789 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
791 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
793 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
794 sv_catpv(Sv,"\" Compile-time options:");
796 sv_catpv(Sv," DEBUGGING");
799 sv_catpv(Sv," NO_EMBED");
802 sv_catpv(Sv," MULTIPLICITY");
804 sv_catpv(Sv,"\\n\",");
806 #if defined(LOCAL_PATCH_COUNT)
807 if (LOCAL_PATCH_COUNT > 0) {
809 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
810 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
812 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
816 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
819 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
821 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
826 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
827 print \" \\%ENV:\\n @env\\n\" if @env; \
828 print \" \\@INC:\\n @INC\\n\";");
831 Sv = newSVpv("config_vars(qw(",0);
836 av_push(preambleav, Sv);
837 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
848 if (!*++s || isSPACE(*s)) {
852 /* catch use of gnu style long options */
853 if (strEQ(s, "version")) {
857 if (strEQ(s, "help")) {
864 croak("Unrecognized switch: -%s (-h will show valid options)",s);
869 if (!tainting && (s = PerlEnv_getenv("PERL5OPT"))) {
880 if (!strchr("DIMUdmw", *s))
881 croak("Illegal switch in PERL5OPT: -%c", *s);
887 scriptname = argv[0];
889 if (PerlIO_flush(e_fp) || PerlIO_error(e_fp) || PerlIO_close(e_fp)) {
891 warn("Did you forget to compile with -DMULTIPLICITY?");
893 croak("Can't write to temp file for -e: %s", Strerror(errno));
897 scriptname = e_tmpname;
899 else if (scriptname == Nullch) {
901 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
909 open_script(scriptname,dosearch,sv);
911 validate_suid(validarg, scriptname);
916 main_cv = compcv = (CV*)NEWSV(1104,0);
917 sv_upgrade((SV *)compcv, SVt_PVCV);
921 av_push(comppad, Nullsv);
922 curpad = AvARRAY(comppad);
923 comppad_name = newAV();
924 comppad_name_fill = 0;
925 min_intro_pending = 0;
928 av_store(comppad_name, 0, newSVpv("@_", 2));
929 curpad[0] = (SV*)newAV();
930 SvPADMY_on(curpad[0]); /* XXX Needed? */
932 New(666, CvMUTEXP(compcv), 1, perl_mutex);
933 MUTEX_INIT(CvMUTEXP(compcv));
934 #endif /* USE_THREADS */
936 comppadlist = newAV();
937 AvREAL_off(comppadlist);
938 av_store(comppadlist, 0, (SV*)comppad_name);
939 av_store(comppadlist, 1, (SV*)comppad);
940 CvPADLIST(compcv) = comppadlist;
942 boot_core_UNIVERSAL();
945 (*xsinit)(THIS); /* in case linked C routines want magical variables */
946 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
950 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
951 DEBUG_L(PerlProc_signal(SIGSEGV, (void(*)(int))catch_sigsegv););
954 init_predump_symbols();
956 init_postdump_symbols(argc,argv,env);
960 /* now parse the script */
962 SETERRNO(0,SS$_NORMAL);
964 if (yyparse() || error_count) {
966 croak("%s had compilation errors.\n", origfilename);
968 croak("Execution of %s aborted due to compilation errors.\n",
972 curcop->cop_line = 0;
976 (void)UNLINK(e_tmpname);
981 /* now that script is parsed, we can modify record separator */
983 rs = SvREFCNT_inc(nrs);
984 sv_setsv(perl_get_sv("/", TRUE), rs);
995 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
996 dump_mstats("after compilation:");
1007 CPerlObj::perl_run(void)
1009 perl_run(PerlInterpreter *sv_interp)
1018 if (!(curinterp = sv_interp))
1022 oldscope = scopestack_ix;
1027 cxstack_ix = -1; /* start context stack again */
1030 /* my_exit() was called */
1031 while (scopestack_ix > oldscope)
1034 curstash = defstash;
1036 call_list(oldscope, endav);
1038 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1039 dump_mstats("after execution: ");
1042 return STATUS_NATIVE_EXPORT;
1045 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1050 if (curstack != mainstack) {
1052 SWITCHSTACK(curstack, mainstack);
1057 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1058 sawampersand ? "Enabling" : "Omitting"));
1061 DEBUG_x(dump_all());
1062 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1064 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1065 (unsigned long) thr));
1066 #endif /* USE_THREADS */
1069 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1072 if (PERLDB_SINGLE && DBsingle)
1073 sv_setiv(DBsingle, 1);
1075 call_list(oldscope, initav);
1085 else if (main_start) {
1086 CvDEPTH(main_cv) = 1;
1097 perl_get_sv(char *name, I32 create)
1101 if (name[1] == '\0' && !isALPHA(name[0])) {
1102 PADOFFSET tmp = find_threadsv(name);
1103 if (tmp != NOT_IN_PAD) {
1105 return THREADSV(tmp);
1108 #endif /* USE_THREADS */
1109 gv = gv_fetchpv(name, create, SVt_PV);
1116 perl_get_av(char *name, I32 create)
1118 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1127 perl_get_hv(char *name, I32 create)
1129 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1138 perl_get_cv(char *name, I32 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(char *sub_name, I32 flags, register char **argv)
1156 /* See G_* flags in cop.h */
1157 /* null terminated arg list */
1164 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1169 return perl_call_pv(sub_name, flags);
1173 perl_call_pv(char *sub_name, I32 flags)
1174 /* name of the subroutine */
1175 /* See G_* flags in cop.h */
1177 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1181 perl_call_method(char *methname, I32 flags)
1182 /* name of the subroutine */
1183 /* See G_* flags in cop.h */
1189 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1192 return perl_call_sv(*stack_sp--, flags);
1195 /* May be called with any of a CV, a GV, or an SV containing the name. */
1197 perl_call_sv(SV *sv, I32 flags)
1199 /* See G_* flags in cop.h */
1202 LOGOP myop; /* fake syntax tree node */
1207 bool oldcatch = CATCH_GET;
1212 if (flags & G_DISCARD) {
1217 Zero(&myop, 1, LOGOP);
1218 myop.op_next = Nullop;
1219 if (!(flags & G_NOARGS))
1220 myop.op_flags |= OPf_STACKED;
1221 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1222 (flags & G_ARRAY) ? OPf_WANT_LIST :
1227 EXTEND(stack_sp, 1);
1230 oldscope = scopestack_ix;
1232 if (PERLDB_SUB && curstash != debstash
1233 /* Handle first BEGIN of -d. */
1234 && (DBcv || (DBcv = GvCV(DBsub)))
1235 /* Try harder, since this may have been a sighandler, thus
1236 * curstash may be meaningless. */
1237 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash))
1238 op->op_private |= OPpENTERSUB_DB;
1240 if (flags & G_EVAL) {
1241 cLOGOP->op_other = op;
1243 /* we're trying to emulate pp_entertry() here */
1245 register PERL_CONTEXT *cx;
1246 I32 gimme = GIMME_V;
1251 push_return(op->op_next);
1252 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1254 eval_root = op; /* Only needed so that goto works right. */
1257 if (flags & G_KEEPERR)
1272 /* my_exit() was called */
1273 curstash = defstash;
1277 croak("Callback called exit");
1286 stack_sp = stack_base + oldmark;
1287 if (flags & G_ARRAY)
1291 *++stack_sp = &sv_undef;
1299 if (op == (OP*)&myop)
1300 op = pp_entersub(ARGS);
1303 retval = stack_sp - (stack_base + oldmark);
1304 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1308 if (flags & G_EVAL) {
1309 if (scopestack_ix > oldscope) {
1313 register PERL_CONTEXT *cx;
1325 CATCH_SET(oldcatch);
1327 if (flags & G_DISCARD) {
1328 stack_sp = stack_base + oldmark;
1337 /* Eval a string. The G_EVAL flag is always assumed. */
1340 perl_eval_sv(SV *sv, I32 flags)
1342 /* See G_* flags in cop.h */
1345 UNOP myop; /* fake syntax tree node */
1347 I32 oldmark = sp - stack_base;
1354 if (flags & G_DISCARD) {
1362 EXTEND(stack_sp, 1);
1364 oldscope = scopestack_ix;
1366 if (!(flags & G_NOARGS))
1367 myop.op_flags = OPf_STACKED;
1368 myop.op_next = Nullop;
1369 myop.op_type = OP_ENTEREVAL;
1370 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1371 (flags & G_ARRAY) ? OPf_WANT_LIST :
1373 if (flags & G_KEEPERR)
1374 myop.op_flags |= OPf_SPECIAL;
1384 /* my_exit() was called */
1385 curstash = defstash;
1389 croak("Callback called exit");
1398 stack_sp = stack_base + oldmark;
1399 if (flags & G_ARRAY)
1403 *++stack_sp = &sv_undef;
1408 if (op == (OP*)&myop)
1409 op = pp_entereval(ARGS);
1412 retval = stack_sp - (stack_base + oldmark);
1413 if (!(flags & G_KEEPERR))
1418 if (flags & G_DISCARD) {
1419 stack_sp = stack_base + oldmark;
1429 perl_eval_pv(char *p, I32 croak_on_error)
1432 SV* sv = newSVpv(p, 0);
1435 perl_eval_sv(sv, G_SCALAR);
1442 if (croak_on_error && SvTRUE(ERRSV))
1443 croak(SvPVx(ERRSV, na));
1448 /* Require a module. */
1451 perl_require_pv(char *pv)
1453 SV* sv = sv_newmortal();
1454 sv_setpv(sv, "require '");
1457 perl_eval_sv(sv, G_DISCARD);
1461 magicname(char *sym, char *name, I32 namlen)
1465 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1466 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1470 usage(char *name) /* XXX move this out into a module ? */
1473 /* This message really ought to be max 23 lines.
1474 * Removed -h because the user already knows that opton. Others? */
1476 static char *usage_msg[] = {
1477 "-0[octal] specify record separator (\\0, if no argument)",
1478 "-a autosplit mode with -n or -p (splits $_ into @F)",
1479 "-c check syntax only (runs BEGIN and END blocks)",
1480 "-d[:debugger] run scripts under debugger",
1481 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1482 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1483 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1484 "-i[extension] edit <> files in place (make backup if extension supplied)",
1485 "-Idirectory specify @INC/#include directory (may be used more than once)",
1486 "-l[octal] enable line ending processing, specifies line terminator",
1487 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1488 "-n assume 'while (<>) { ... }' loop around your script",
1489 "-p assume loop like -n but print line also like sed",
1490 "-P run script through C preprocessor before compilation",
1491 "-s enable some switch parsing for switches after script name",
1492 "-S look for the script using PATH environment variable",
1493 "-T turn on tainting checks",
1494 "-u dump core after parsing script",
1495 "-U allow unsafe operations",
1496 "-v print version number and patchlevel of perl",
1497 "-V[:variable] print perl configuration information",
1498 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1499 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1503 char **p = usage_msg;
1505 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1507 printf("\n %s", *p++);
1510 /* This routine handles any switches that can be given during run */
1513 moreswitches(char *s)
1522 rschar = scan_oct(s, 4, &numlen);
1524 if (rschar & ~((U8)~0))
1526 else if (!rschar && numlen >= 2)
1527 nrs = newSVpv("", 0);
1530 nrs = newSVpv(&ch, 1);
1536 splitstr = savepv(s + 1);
1550 if (*s == ':' || *s == '=') {
1551 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1555 perldb = PERLDB_ALL;
1562 if (isALPHA(s[1])) {
1563 static char debopts[] = "psltocPmfrxuLHXD";
1566 for (s++; *s && (d = strchr(debopts,*s)); s++)
1567 debug |= 1 << (d - debopts);
1571 for (s++; isDIGIT(*s); s++) ;
1573 debug |= 0x80000000;
1575 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1576 for (s++; isALNUM(*s); s++) ;
1586 inplace = savepv(s+1);
1588 for (s = inplace; *s && !isSPACE(*s); s++) ;
1592 case 'I': /* -I handled both here and in parse_perl() */
1595 while (*s && isSPACE(*s))
1599 for (e = s; *e && !isSPACE(*e); e++) ;
1600 p = savepvn(s, e-s);
1606 croak("No space allowed after -I");
1616 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1626 ors = SvPV(nrs, orslen);
1627 ors = savepvn(ors, orslen);
1631 forbid_setid("-M"); /* XXX ? */
1634 forbid_setid("-m"); /* XXX ? */
1639 /* -M-foo == 'no foo' */
1640 if (*s == '-') { use = "no "; ++s; }
1641 sv = newSVpv(use,0);
1643 /* We allow -M'Module qw(Foo Bar)' */
1644 while(isALNUM(*s) || *s==':') ++s;
1646 sv_catpv(sv, start);
1647 if (*(start-1) == 'm') {
1649 croak("Can't use '%c' after -mname", *s);
1650 sv_catpv( sv, " ()");
1653 sv_catpvn(sv, start, s-start);
1654 sv_catpv(sv, " split(/,/,q{");
1659 if (preambleav == NULL)
1660 preambleav = newAV();
1661 av_push(preambleav, sv);
1664 croak("No space allowed after -%c", *(s-1));
1681 croak("Too late for \"-T\" option");
1693 #if defined(SUBVERSION) && SUBVERSION > 0
1694 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1695 PATCHLEVEL, SUBVERSION, ARCHNAME);
1697 printf("\nThis is perl, version %s built for %s",
1698 patchlevel, ARCHNAME);
1700 #if defined(LOCAL_PATCH_COUNT)
1701 if (LOCAL_PATCH_COUNT > 0)
1702 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1703 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1706 printf("\n\nCopyright 1987-1998, Larry Wall\n");
1708 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1711 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1712 printf("djgpp v2 port (perl5004) by Laszlo Molnar, 1997\n");
1715 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1716 "Version 5 port Copyright (c) 1994-1998, Andreas Kaiser, Ilya Zakharevich\n");
1719 printf("atariST series port, ++jrb bammi@cadence.com\n");
1722 Perl may be copied only under the terms of either the Artistic License or the\n\
1723 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n");
1731 if (s[1] == '-') /* Additional switches on #! line. */
1742 #ifdef ALTERNATE_SHEBANG
1743 case 'S': /* OS/2 needs -S on "extproc" line. */
1751 croak("Can't emulate -%.1s on #! line",s);
1756 /* compliments of Tom Christiansen */
1758 /* unexec() can be found in the Gnu emacs distribution */
1769 prog = newSVpv(BIN_EXP);
1770 sv_catpv(prog, "/perl");
1771 file = newSVpv(origfilename);
1772 sv_catpv(file, ".perldump");
1774 status = unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1776 PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n",
1777 SvPVX(prog), SvPVX(file));
1778 PerlProc_exit(status);
1781 # include <lib$routines.h>
1782 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1784 ABORT(); /* for use with undump */
1790 init_main_stash(void)
1795 /* Note that strtab is a rather special HV. Assumptions are made
1796 about not iterating on it, and not adding tie magic to it.
1797 It is properly deallocated in perl_destruct() */
1799 HvSHAREKEYS_off(strtab); /* mandatory */
1800 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1801 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1803 curstash = defstash = newHV();
1804 curstname = newSVpv("main",4);
1805 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1806 SvREFCNT_dec(GvHV(gv));
1807 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1809 HvNAME(defstash) = savepv("main");
1810 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1812 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1813 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1815 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1816 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1817 sv_setpvn(ERRSV, "", 0);
1818 curstash = defstash;
1819 compiling.cop_stash = defstash;
1820 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1821 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1822 /* We must init $/ before switches are processed. */
1823 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1826 #ifdef CAN_PROTOTYPE
1828 open_script(char *scriptname, bool dosearch, SV *sv)
1831 open_script(scriptname,dosearch,sv)
1838 char *xfound = Nullch;
1839 char *xfailed = Nullch;
1843 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
1844 # define SEARCH_EXTS ".bat", ".cmd", NULL
1845 # define MAX_EXT_LEN 4
1848 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
1849 # define MAX_EXT_LEN 4
1852 # define SEARCH_EXTS ".pl", ".com", NULL
1853 # define MAX_EXT_LEN 4
1855 /* additional extensions to try in each dir if scriptname not found */
1857 char *ext[] = { SEARCH_EXTS };
1858 int extidx = 0, i = 0;
1859 char *curext = Nullch;
1861 # define MAX_EXT_LEN 0
1865 * If dosearch is true and if scriptname does not contain path
1866 * delimiters, search the PATH for scriptname.
1868 * If SEARCH_EXTS is also defined, will look for each
1869 * scriptname{SEARCH_EXTS} whenever scriptname is not found
1870 * while searching the PATH.
1872 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
1873 * proceeds as follows:
1874 * If DOSISH or VMSISH:
1875 * + look for ./scriptname{,.foo,.bar}
1876 * + search the PATH for scriptname{,.foo,.bar}
1879 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
1880 * this will not look in '.' if it's not in the PATH)
1884 # ifdef ALWAYS_DEFTYPES
1885 len = strlen(scriptname);
1886 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
1887 int hasdir, idx = 0, deftypes = 1;
1890 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
1893 int hasdir, idx = 0, deftypes = 1;
1896 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
1898 /* The first time through, just add SEARCH_EXTS to whatever we
1899 * already have, so we can check for default file types. */
1901 (!hasdir && my_trnlnm("DCL$PATH",tokenbuf,idx++)) )
1907 if ((strlen(tokenbuf) + strlen(scriptname)
1908 + MAX_EXT_LEN) >= sizeof tokenbuf)
1909 continue; /* don't search dir with too-long name */
1910 strcat(tokenbuf, scriptname);
1914 if (strEQ(scriptname, "-"))
1916 if (dosearch) { /* Look in '.' first. */
1917 char *cur = scriptname;
1919 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
1921 if (strEQ(ext[i++],curext)) {
1922 extidx = -1; /* already has an ext */
1927 DEBUG_p(PerlIO_printf(Perl_debug_log,
1928 "Looking for %s\n",cur));
1929 if (PerlLIO_stat(cur,&statbuf) >= 0) {
1937 if (cur == scriptname) {
1938 len = strlen(scriptname);
1939 if (len+MAX_EXT_LEN+1 >= sizeof(tokenbuf))
1941 cur = strcpy(tokenbuf, scriptname);
1943 } while (extidx >= 0 && ext[extidx] /* try an extension? */
1944 && strcpy(tokenbuf+len, ext[extidx++]));
1949 if (dosearch && !strchr(scriptname, '/')
1951 && !strchr(scriptname, '\\')
1953 && (s = PerlEnv_getenv("PATH"))) {
1956 bufend = s + strlen(s);
1957 while (s < bufend) {
1958 #if defined(atarist) || defined(DOSISH)
1963 && *s != ';'; len++, s++) {
1964 if (len < sizeof tokenbuf)
1967 if (len < sizeof tokenbuf)
1968 tokenbuf[len] = '\0';
1969 #else /* ! (atarist || DOSISH) */
1970 s = delimcpy(tokenbuf, tokenbuf + sizeof tokenbuf, s, bufend,
1973 #endif /* ! (atarist || DOSISH) */
1976 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tokenbuf)
1977 continue; /* don't search dir with too-long name */
1979 #if defined(atarist) || defined(DOSISH)
1980 && tokenbuf[len - 1] != '/'
1981 && tokenbuf[len - 1] != '\\'
1984 tokenbuf[len++] = '/';
1985 if (len == 2 && tokenbuf[0] == '.')
1987 (void)strcpy(tokenbuf + len, scriptname);
1991 len = strlen(tokenbuf);
1992 if (extidx > 0) /* reset after previous loop */
1996 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tokenbuf));
1997 retval = PerlLIO_stat(tokenbuf,&statbuf);
1999 } while ( retval < 0 /* not there */
2000 && extidx>=0 && ext[extidx] /* try an extension? */
2001 && strcpy(tokenbuf+len, ext[extidx++])
2006 if (S_ISREG(statbuf.st_mode)
2007 && cando(S_IRUSR,TRUE,&statbuf)
2009 && cando(S_IXUSR,TRUE,&statbuf)
2013 xfound = tokenbuf; /* bingo! */
2017 xfailed = savepv(tokenbuf);
2020 if (!xfound && !seen_dot && !xfailed && (PerlLIO_stat(scriptname,&statbuf) < 0))
2022 seen_dot = 1; /* Disable message. */
2024 croak("Can't %s %s%s%s",
2025 (xfailed ? "execute" : "find"),
2026 (xfailed ? xfailed : scriptname),
2027 (xfailed ? "" : " on PATH"),
2028 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2031 scriptname = xfound;
2034 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2035 char *s = scriptname + 8;
2044 origfilename = savepv(e_tmpname ? "-e" : scriptname);
2045 curcop->cop_filegv = gv_fetchfile(origfilename);
2046 if (strEQ(origfilename,"-"))
2048 if (fdscript >= 0) {
2049 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
2050 #if defined(HAS_FCNTL) && defined(F_SETFD)
2052 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2055 else if (preprocess) {
2056 char *cpp_cfg = CPPSTDIN;
2057 SV *cpp = NEWSV(0,0);
2058 SV *cmd = NEWSV(0,0);
2060 if (strEQ(cpp_cfg, "cppstdin"))
2061 sv_catpvf(cpp, "%s/", BIN_EXP);
2062 sv_catpv(cpp, cpp_cfg);
2065 sv_catpv(sv,PRIVLIB_EXP);
2069 sed %s -e \"/^[^#]/b\" \
2070 -e \"/^#[ ]*include[ ]/b\" \
2071 -e \"/^#[ ]*define[ ]/b\" \
2072 -e \"/^#[ ]*if[ ]/b\" \
2073 -e \"/^#[ ]*ifdef[ ]/b\" \
2074 -e \"/^#[ ]*ifndef[ ]/b\" \
2075 -e \"/^#[ ]*else/b\" \
2076 -e \"/^#[ ]*elif[ ]/b\" \
2077 -e \"/^#[ ]*undef[ ]/b\" \
2078 -e \"/^#[ ]*endif/b\" \
2081 (doextract ? "-e \"1,/^#/d\n\"" : ""),
2084 %s %s -e '/^[^#]/b' \
2085 -e '/^#[ ]*include[ ]/b' \
2086 -e '/^#[ ]*define[ ]/b' \
2087 -e '/^#[ ]*if[ ]/b' \
2088 -e '/^#[ ]*ifdef[ ]/b' \
2089 -e '/^#[ ]*ifndef[ ]/b' \
2090 -e '/^#[ ]*else/b' \
2091 -e '/^#[ ]*elif[ ]/b' \
2092 -e '/^#[ ]*undef[ ]/b' \
2093 -e '/^#[ ]*endif/b' \
2101 (doextract ? "-e '1,/^#/d\n'" : ""),
2103 scriptname, cpp, sv, CPPMINUS);
2105 #ifdef IAMSUID /* actually, this is caught earlier */
2106 if (euid != uid && !euid) { /* if running suidperl */
2108 (void)seteuid(uid); /* musn't stay setuid root */
2111 (void)setreuid((Uid_t)-1, uid);
2113 #ifdef HAS_SETRESUID
2114 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
2116 PerlProc_setuid(uid);
2120 if (PerlProc_geteuid() != uid)
2121 croak("Can't do seteuid!\n");
2123 #endif /* IAMSUID */
2124 rsfp = PerlProc_popen(SvPVX(cmd), "r");
2128 else if (!*scriptname) {
2129 forbid_setid("program input from stdin");
2130 rsfp = PerlIO_stdin();
2133 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2134 #if defined(HAS_FCNTL) && defined(F_SETFD)
2136 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2144 #ifndef IAMSUID /* in case script is not readable before setuid */
2145 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2146 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2148 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2149 croak("Can't do setuid\n");
2153 croak("Can't open perl script \"%s\": %s\n",
2154 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2159 validate_suid(char *validarg, char *scriptname)
2163 /* do we need to emulate setuid on scripts? */
2165 /* This code is for those BSD systems that have setuid #! scripts disabled
2166 * in the kernel because of a security problem. Merely defining DOSUID
2167 * in perl will not fix that problem, but if you have disabled setuid
2168 * scripts in the kernel, this will attempt to emulate setuid and setgid
2169 * on scripts that have those now-otherwise-useless bits set. The setuid
2170 * root version must be called suidperl or sperlN.NNN. If regular perl
2171 * discovers that it has opened a setuid script, it calls suidperl with
2172 * the same argv that it had. If suidperl finds that the script it has
2173 * just opened is NOT setuid root, it sets the effective uid back to the
2174 * uid. We don't just make perl setuid root because that loses the
2175 * effective uid we had before invoking perl, if it was different from the
2178 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2179 * be defined in suidperl only. suidperl must be setuid root. The
2180 * Configure script will set this up for you if you want it.
2187 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2188 croak("Can't stat script \"%s\"",origfilename);
2189 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2193 #ifndef HAS_SETREUID
2194 /* On this access check to make sure the directories are readable,
2195 * there is actually a small window that the user could use to make
2196 * filename point to an accessible directory. So there is a faint
2197 * chance that someone could execute a setuid script down in a
2198 * non-accessible directory. I don't know what to do about that.
2199 * But I don't think it's too important. The manual lies when
2200 * it says access() is useful in setuid programs.
2202 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2203 croak("Permission denied");
2205 /* If we can swap euid and uid, then we can determine access rights
2206 * with a simple stat of the file, and then compare device and
2207 * inode to make sure we did stat() on the same file we opened.
2208 * Then we just have to make sure he or she can execute it.
2211 struct stat tmpstatbuf;
2215 setreuid(euid,uid) < 0
2218 setresuid(euid,uid,(Uid_t)-1) < 0
2221 || PerlProc_getuid() != euid || PerlProc_geteuid() != uid)
2222 croak("Can't swap uid and euid"); /* really paranoid */
2223 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2224 croak("Permission denied"); /* testing full pathname here */
2225 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2226 tmpstatbuf.st_ino != statbuf.st_ino) {
2227 (void)PerlIO_close(rsfp);
2228 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2230 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2231 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2232 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2233 (long)statbuf.st_dev, (long)statbuf.st_ino,
2234 SvPVX(GvSV(curcop->cop_filegv)),
2235 (long)statbuf.st_uid, (long)statbuf.st_gid);
2236 (void)PerlProc_pclose(rsfp);
2238 croak("Permission denied\n");
2242 setreuid(uid,euid) < 0
2244 # if defined(HAS_SETRESUID)
2245 setresuid(uid,euid,(Uid_t)-1) < 0
2248 || PerlProc_getuid() != uid || PerlProc_geteuid() != euid)
2249 croak("Can't reswap uid and euid");
2250 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2251 croak("Permission denied\n");
2253 #endif /* HAS_SETREUID */
2254 #endif /* IAMSUID */
2256 if (!S_ISREG(statbuf.st_mode))
2257 croak("Permission denied");
2258 if (statbuf.st_mode & S_IWOTH)
2259 croak("Setuid/gid script is writable by world");
2260 doswitches = FALSE; /* -s is insecure in suid */
2262 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2263 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2264 croak("No #! line");
2265 s = SvPV(linestr,na)+2;
2267 while (!isSPACE(*s)) s++;
2268 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2269 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2270 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2271 croak("Not a perl script");
2272 while (*s == ' ' || *s == '\t') s++;
2274 * #! arg must be what we saw above. They can invoke it by
2275 * mentioning suidperl explicitly, but they may not add any strange
2276 * arguments beyond what #! says if they do invoke suidperl that way.
2278 len = strlen(validarg);
2279 if (strEQ(validarg," PHOOEY ") ||
2280 strnNE(s,validarg,len) || !isSPACE(s[len]))
2281 croak("Args must match #! line");
2284 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2285 euid == statbuf.st_uid)
2287 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2288 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2289 #endif /* IAMSUID */
2291 if (euid) { /* oops, we're not the setuid root perl */
2292 (void)PerlIO_close(rsfp);
2295 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2297 croak("Can't do setuid\n");
2300 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2302 (void)setegid(statbuf.st_gid);
2305 (void)setregid((Gid_t)-1,statbuf.st_gid);
2307 #ifdef HAS_SETRESGID
2308 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2310 PerlProc_setgid(statbuf.st_gid);
2314 if (PerlProc_getegid() != statbuf.st_gid)
2315 croak("Can't do setegid!\n");
2317 if (statbuf.st_mode & S_ISUID) {
2318 if (statbuf.st_uid != euid)
2320 (void)seteuid(statbuf.st_uid); /* all that for this */
2323 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2325 #ifdef HAS_SETRESUID
2326 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2328 PerlProc_setuid(statbuf.st_uid);
2332 if (PerlProc_geteuid() != statbuf.st_uid)
2333 croak("Can't do seteuid!\n");
2335 else if (uid) { /* oops, mustn't run as root */
2337 (void)seteuid((Uid_t)uid);
2340 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2342 #ifdef HAS_SETRESUID
2343 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2345 PerlProc_setuid((Uid_t)uid);
2349 if (PerlProc_geteuid() != uid)
2350 croak("Can't do seteuid!\n");
2353 if (!cando(S_IXUSR,TRUE,&statbuf))
2354 croak("Permission denied\n"); /* they can't do this */
2357 else if (preprocess)
2358 croak("-P not allowed for setuid/setgid script\n");
2359 else if (fdscript >= 0)
2360 croak("fd script not allowed in suidperl\n");
2362 croak("Script is not setuid/setgid in suidperl\n");
2364 /* We absolutely must clear out any saved ids here, so we */
2365 /* exec the real perl, substituting fd script for scriptname. */
2366 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2367 PerlIO_rewind(rsfp);
2368 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2369 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2370 if (!origargv[which])
2371 croak("Permission denied");
2372 origargv[which] = savepv(form("/dev/fd/%d/%s",
2373 PerlIO_fileno(rsfp), origargv[which]));
2374 #if defined(HAS_FCNTL) && defined(F_SETFD)
2375 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2377 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2378 croak("Can't do setuid\n");
2379 #endif /* IAMSUID */
2381 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2382 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2384 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2385 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2387 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2390 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2391 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2392 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2393 /* not set-id, must be wrapped */
2399 find_beginning(void)
2401 register char *s, *s2;
2403 /* skip forward in input to the real script? */
2407 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2408 croak("No Perl script found in input\n");
2409 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2410 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2412 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2414 while (*s == ' ' || *s == '\t') s++;
2416 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2417 if (strnEQ(s2-4,"perl",4))
2419 while (s = moreswitches(s)) ;
2421 if (cddir && PerlDir_chdir(cddir) < 0)
2422 croak("Can't chdir to %s",cddir);
2430 uid = (int)PerlProc_getuid();
2431 euid = (int)PerlProc_geteuid();
2432 gid = (int)PerlProc_getgid();
2433 egid = (int)PerlProc_getegid();
2438 tainting |= (uid && (euid != uid || egid != gid));
2442 forbid_setid(char *s)
2445 croak("No %s allowed while running setuid", s);
2447 croak("No %s allowed while running setgid", s);
2454 curstash = debstash;
2455 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2457 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2458 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2459 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2460 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2461 sv_setiv(DBsingle, 0);
2462 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2463 sv_setiv(DBtrace, 0);
2464 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2465 sv_setiv(DBsignal, 0);
2466 curstash = defstash;
2470 init_stacks(ARGSproto)
2473 mainstack = curstack; /* remember in case we switch stacks */
2474 AvREAL_off(curstack); /* not a real array */
2475 av_extend(curstack,127);
2477 stack_base = AvARRAY(curstack);
2478 stack_sp = stack_base;
2479 stack_max = stack_base + 127;
2481 cxstack_max = 8192 / sizeof(PERL_CONTEXT) - 2; /* Use most of 8K. */
2482 New(50,cxstack,cxstack_max + 1,PERL_CONTEXT);
2485 New(50,tmps_stack,128,SV*);
2491 * The following stacks almost certainly should be per-interpreter,
2492 * but for now they're not. XXX
2496 markstack_ptr = markstack;
2498 New(54,markstack,64,I32);
2499 markstack_ptr = markstack;
2500 markstack_max = markstack + 64;
2506 New(54,scopestack,32,I32);
2508 scopestack_max = 32;
2514 New(54,savestack,128,ANY);
2516 savestack_max = 128;
2522 New(54,retstack,16,OP*);
2533 Safefree(tmps_stack);
2541 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2554 subname = newSVpv("main",4);
2558 init_predump_symbols(void)
2564 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2565 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2566 GvMULTI_on(stdingv);
2567 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2568 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2570 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2572 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2574 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2576 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2578 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2580 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2581 GvMULTI_on(othergv);
2582 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2583 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2585 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2587 statname = NEWSV(66,0); /* last filename we did stat on */
2590 osname = savepv(OSNAME);
2594 init_postdump_symbols(register int argc, register char **argv, register char **env)
2601 argc--,argv++; /* skip name of script */
2603 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2606 if (argv[0][1] == '-') {
2610 if (s = strchr(argv[0], '=')) {
2612 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2615 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2618 toptarget = NEWSV(0,0);
2619 sv_upgrade(toptarget, SVt_PVFM);
2620 sv_setpvn(toptarget, "", 0);
2621 bodytarget = NEWSV(0,0);
2622 sv_upgrade(bodytarget, SVt_PVFM);
2623 sv_setpvn(bodytarget, "", 0);
2624 formtarget = bodytarget;
2627 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2628 sv_setpv(GvSV(tmpgv),origfilename);
2629 magicname("0", "0", 1);
2631 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2632 sv_setpv(GvSV(tmpgv),origargv[0]);
2633 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2635 (void)gv_AVadd(argvgv);
2636 av_clear(GvAVn(argvgv));
2637 for (; argc > 0; argc--,argv++) {
2638 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2641 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2645 hv_magic(hv, envgv, 'E');
2646 #ifndef VMS /* VMS doesn't have environ array */
2647 /* Note that if the supplied env parameter is actually a copy
2648 of the global environ then it may now point to free'd memory
2649 if the environment has been modified since. To avoid this
2650 problem we treat env==NULL as meaning 'use the default'
2655 environ[0] = Nullch;
2656 for (; *env; env++) {
2657 if (!(s = strchr(*env,'=')))
2660 #if defined(WIN32) || defined(MSDOS)
2663 sv = newSVpv(s--,0);
2664 (void)hv_store(hv, *env, s - *env, sv, 0);
2666 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2667 /* Sins of the RTL. See note in my_setenv(). */
2668 (void)PerlEnv_putenv(savepv(*env));
2672 #ifdef DYNAMIC_ENV_FETCH
2673 HvNAME(hv) = savepv(ENV_HV_NAME);
2677 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2678 sv_setiv(GvSV(tmpgv), (IV)getpid());
2687 s = PerlEnv_getenv("PERL5LIB");
2691 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2693 /* Treat PERL5?LIB as a possible search list logical name -- the
2694 * "natural" VMS idiom for a Unix path string. We allow each
2695 * element to be a set of |-separated directories for compatibility.
2699 if (my_trnlnm("PERL5LIB",buf,0))
2700 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2702 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2706 /* Use the ~-expanded versions of APPLLIB (undocumented),
2707 ARCHLIB PRIVLIB SITEARCH SITELIB and OLDARCHLIB
2710 incpush(APPLLIB_EXP, FALSE);
2714 incpush(ARCHLIB_EXP, FALSE);
2717 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2719 incpush(PRIVLIB_EXP, FALSE);
2722 incpush(SITEARCH_EXP, FALSE);
2725 incpush(SITELIB_EXP, FALSE);
2727 #ifdef OLDARCHLIB_EXP /* 5.00[01] compatibility */
2728 incpush(OLDARCHLIB_EXP, FALSE);
2732 incpush(".", FALSE);
2736 # define PERLLIB_SEP ';'
2739 # define PERLLIB_SEP '|'
2741 # define PERLLIB_SEP ':'
2744 #ifndef PERLLIB_MANGLE
2745 # define PERLLIB_MANGLE(s,n) (s)
2749 incpush(char *p, int addsubdirs)
2751 SV *subdir = Nullsv;
2757 subdir = NEWSV(55,0);
2758 if (!archpat_auto) {
2759 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2760 + sizeof("//auto"));
2761 New(55, archpat_auto, len, char);
2762 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2764 for (len = sizeof(ARCHNAME) + 2;
2765 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2766 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2771 /* Break at all separators */
2773 SV *libdir = NEWSV(55,0);
2776 /* skip any consecutive separators */
2777 while ( *p == PERLLIB_SEP ) {
2778 /* Uncomment the next line for PATH semantics */
2779 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2783 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2784 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2789 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2790 p = Nullch; /* break out */
2794 * BEFORE pushing libdir onto @INC we may first push version- and
2795 * archname-specific sub-directories.
2798 struct stat tmpstatbuf;
2803 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2805 while (unix[len-1] == '/') len--; /* Cosmetic */
2806 sv_usepvn(libdir,unix,len);
2809 PerlIO_printf(PerlIO_stderr(),
2810 "Failed to unixify @INC element \"%s\"\n",
2813 /* .../archname/version if -d .../archname/version/auto */
2814 sv_setsv(subdir, libdir);
2815 sv_catpv(subdir, archpat_auto);
2816 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2817 S_ISDIR(tmpstatbuf.st_mode))
2818 av_push(GvAVn(incgv),
2819 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2821 /* .../archname if -d .../archname/auto */
2822 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2823 strlen(patchlevel) + 1, "", 0);
2824 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2825 S_ISDIR(tmpstatbuf.st_mode))
2826 av_push(GvAVn(incgv),
2827 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2830 /* finally push this lib directory on the end of @INC */
2831 av_push(GvAVn(incgv), libdir);
2834 SvREFCNT_dec(subdir);
2838 STATIC struct perl_thread *
2841 struct perl_thread *thr;
2844 Newz(53, thr, 1, struct perl_thread);
2845 curcop = &compiling;
2846 thr->cvcache = newHV();
2847 thr->threadsv = newAV();
2848 /* thr->threadsvp is set when find_threadsv is called */
2849 thr->specific = newAV();
2850 thr->errhv = newHV();
2851 thr->flags = THRf_R_JOINABLE;
2852 MUTEX_INIT(&thr->mutex);
2853 /* Handcraft thrsv similarly to mess_sv */
2854 New(53, thrsv, 1, SV);
2855 Newz(53, xpv, 1, XPV);
2856 SvFLAGS(thrsv) = SVt_PV;
2857 SvANY(thrsv) = (void*)xpv;
2858 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2859 SvPVX(thrsv) = (char*)thr;
2860 SvCUR_set(thrsv, sizeof(thr));
2861 SvLEN_set(thrsv, sizeof(thr));
2862 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2864 curcop = &compiling;
2867 MUTEX_LOCK(&threads_mutex);
2872 MUTEX_UNLOCK(&threads_mutex);
2874 #ifdef HAVE_THREAD_INTERN
2875 init_thread_intern(thr);
2878 #ifdef SET_THREAD_SELF
2879 SET_THREAD_SELF(thr);
2881 thr->self = pthread_self();
2882 #endif /* SET_THREAD_SELF */
2886 * These must come after the SET_THR because sv_setpvn does
2887 * SvTAINT and the taint fields require dTHR.
2889 toptarget = NEWSV(0,0);
2890 sv_upgrade(toptarget, SVt_PVFM);
2891 sv_setpvn(toptarget, "", 0);
2892 bodytarget = NEWSV(0,0);
2893 sv_upgrade(bodytarget, SVt_PVFM);
2894 sv_setpvn(bodytarget, "", 0);
2895 formtarget = bodytarget;
2896 thr->errsv = newSVpv("", 0);
2897 (void) find_threadsv("@"); /* Ensure $@ is initialised early */
2900 #endif /* USE_THREADS */
2903 call_list(I32 oldscope, AV *paramList)
2906 line_t oldline = curcop->cop_line;
2911 while (AvFILL(paramList) >= 0) {
2912 CV *cv = (CV*)av_shift(paramList);
2921 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2922 (void)SvPV(atsv, len);
2925 curcop = &compiling;
2926 curcop->cop_line = oldline;
2927 if (paramList == beginav)
2928 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2930 sv_catpv(atsv, "END failed--cleanup aborted");
2931 while (scopestack_ix > oldscope)
2933 croak("%s", SvPVX(atsv));
2941 /* my_exit() was called */
2942 while (scopestack_ix > oldscope)
2945 curstash = defstash;
2947 call_list(oldscope, endav);
2949 curcop = &compiling;
2950 curcop->cop_line = oldline;
2952 if (paramList == beginav)
2953 croak("BEGIN failed--compilation aborted");
2955 croak("END failed--cleanup aborted");
2961 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2966 curcop = &compiling;
2967 curcop->cop_line = oldline;
2980 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2981 thr, (unsigned long) status));
2982 #endif /* USE_THREADS */
2991 STATUS_NATIVE_SET(status);
2998 my_failure_exit(void)
3001 if (vaxc$errno & 1) {
3002 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
3003 STATUS_NATIVE_SET(44);
3006 if (!vaxc$errno && errno) /* unlikely */
3007 STATUS_NATIVE_SET(44);
3009 STATUS_NATIVE_SET(vaxc$errno);
3013 STATUS_POSIX_SET(errno);
3014 else if (STATUS_POSIX == 0)
3015 STATUS_POSIX_SET(255);
3024 register PERL_CONTEXT *cx;
3033 (void)UNLINK(e_tmpname);
3034 Safefree(e_tmpname);
3038 if (cxstack_ix >= 0) {