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; \
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();
943 #if defined(WIN32) && defined(PERL_OBJECT)
947 (*xsinit)(THIS); /* in case linked C routines want magical variables */
948 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
952 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
953 DEBUG_L(PerlProc_signal(SIGSEGV, (void(*)(int))catch_sigsegv););
956 init_predump_symbols();
958 init_postdump_symbols(argc,argv,env);
962 /* now parse the script */
964 SETERRNO(0,SS$_NORMAL);
966 if (yyparse() || error_count) {
968 croak("%s had compilation errors.\n", origfilename);
970 croak("Execution of %s aborted due to compilation errors.\n",
974 curcop->cop_line = 0;
978 (void)UNLINK(e_tmpname);
983 /* now that script is parsed, we can modify record separator */
985 rs = SvREFCNT_inc(nrs);
986 sv_setsv(perl_get_sv("/", TRUE), rs);
997 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
998 dump_mstats("after compilation:");
1009 CPerlObj::perl_run(void)
1011 perl_run(PerlInterpreter *sv_interp)
1020 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 (PerlEnv_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(char *name, I32 create)
1103 if (name[1] == '\0' && !isALPHA(name[0])) {
1104 PADOFFSET tmp = find_threadsv(name);
1105 if (tmp != NOT_IN_PAD) {
1107 return THREADSV(tmp);
1110 #endif /* USE_THREADS */
1111 gv = gv_fetchpv(name, create, SVt_PV);
1118 perl_get_av(char *name, I32 create)
1120 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1129 perl_get_hv(char *name, I32 create)
1131 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1140 perl_get_cv(char *name, I32 create)
1142 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1143 if (create && !GvCVu(gv))
1144 return newSUB(start_subparse(FALSE, 0),
1145 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1153 /* Be sure to refetch the stack pointer after calling these routines. */
1156 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1158 /* See G_* flags in cop.h */
1159 /* null terminated arg list */
1166 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1171 return perl_call_pv(sub_name, flags);
1175 perl_call_pv(char *sub_name, I32 flags)
1176 /* name of the subroutine */
1177 /* See G_* flags in cop.h */
1179 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1183 perl_call_method(char *methname, I32 flags)
1184 /* name of the subroutine */
1185 /* 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 *sv, I32 flags)
1201 /* See G_* flags in cop.h */
1204 LOGOP myop; /* fake syntax tree node */
1209 bool oldcatch = CATCH_GET;
1214 if (flags & G_DISCARD) {
1219 Zero(&myop, 1, LOGOP);
1220 myop.op_next = Nullop;
1221 if (!(flags & G_NOARGS))
1222 myop.op_flags |= OPf_STACKED;
1223 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1224 (flags & G_ARRAY) ? OPf_WANT_LIST :
1229 EXTEND(stack_sp, 1);
1232 oldscope = scopestack_ix;
1234 if (PERLDB_SUB && curstash != debstash
1235 /* Handle first BEGIN of -d. */
1236 && (DBcv || (DBcv = GvCV(DBsub)))
1237 /* Try harder, since this may have been a sighandler, thus
1238 * curstash may be meaningless. */
1239 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash))
1240 op->op_private |= OPpENTERSUB_DB;
1242 if (flags & G_EVAL) {
1243 cLOGOP->op_other = op;
1245 /* we're trying to emulate pp_entertry() here */
1247 register PERL_CONTEXT *cx;
1248 I32 gimme = GIMME_V;
1253 push_return(op->op_next);
1254 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1256 eval_root = op; /* Only needed so that goto works right. */
1259 if (flags & G_KEEPERR)
1274 /* my_exit() was called */
1275 curstash = defstash;
1279 croak("Callback called exit");
1288 stack_sp = stack_base + oldmark;
1289 if (flags & G_ARRAY)
1293 *++stack_sp = &sv_undef;
1301 if (op == (OP*)&myop)
1302 op = pp_entersub(ARGS);
1305 retval = stack_sp - (stack_base + oldmark);
1306 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1310 if (flags & G_EVAL) {
1311 if (scopestack_ix > oldscope) {
1315 register PERL_CONTEXT *cx;
1327 CATCH_SET(oldcatch);
1329 if (flags & G_DISCARD) {
1330 stack_sp = stack_base + oldmark;
1339 /* Eval a string. The G_EVAL flag is always assumed. */
1342 perl_eval_sv(SV *sv, I32 flags)
1344 /* See G_* flags in cop.h */
1347 UNOP myop; /* fake syntax tree node */
1349 I32 oldmark = sp - stack_base;
1356 if (flags & G_DISCARD) {
1364 EXTEND(stack_sp, 1);
1366 oldscope = scopestack_ix;
1368 if (!(flags & G_NOARGS))
1369 myop.op_flags = OPf_STACKED;
1370 myop.op_next = Nullop;
1371 myop.op_type = OP_ENTEREVAL;
1372 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1373 (flags & G_ARRAY) ? OPf_WANT_LIST :
1375 if (flags & G_KEEPERR)
1376 myop.op_flags |= OPf_SPECIAL;
1386 /* my_exit() was called */
1387 curstash = defstash;
1391 croak("Callback called exit");
1400 stack_sp = stack_base + oldmark;
1401 if (flags & G_ARRAY)
1405 *++stack_sp = &sv_undef;
1410 if (op == (OP*)&myop)
1411 op = pp_entereval(ARGS);
1414 retval = stack_sp - (stack_base + oldmark);
1415 if (!(flags & G_KEEPERR))
1420 if (flags & G_DISCARD) {
1421 stack_sp = stack_base + oldmark;
1431 perl_eval_pv(char *p, I32 croak_on_error)
1434 SV* sv = newSVpv(p, 0);
1437 perl_eval_sv(sv, G_SCALAR);
1444 if (croak_on_error && SvTRUE(ERRSV))
1445 croak(SvPVx(ERRSV, na));
1450 /* Require a module. */
1453 perl_require_pv(char *pv)
1455 SV* sv = sv_newmortal();
1456 sv_setpv(sv, "require '");
1459 perl_eval_sv(sv, G_DISCARD);
1463 magicname(char *sym, char *name, I32 namlen)
1467 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1468 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1472 usage(char *name) /* XXX move this out into a module ? */
1475 /* This message really ought to be max 23 lines.
1476 * Removed -h because the user already knows that opton. Others? */
1478 static char *usage_msg[] = {
1479 "-0[octal] specify record separator (\\0, if no argument)",
1480 "-a autosplit mode with -n or -p (splits $_ into @F)",
1481 "-c check syntax only (runs BEGIN and END blocks)",
1482 "-d[:debugger] run scripts under debugger",
1483 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1484 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1485 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1486 "-i[extension] edit <> files in place (make backup if extension supplied)",
1487 "-Idirectory specify @INC/#include directory (may be used more than once)",
1488 "-l[octal] enable line ending processing, specifies line terminator",
1489 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1490 "-n assume 'while (<>) { ... }' loop around your script",
1491 "-p assume loop like -n but print line also like sed",
1492 "-P run script through C preprocessor before compilation",
1493 "-s enable some switch parsing for switches after script name",
1494 "-S look for the script using PATH environment variable",
1495 "-T turn on tainting checks",
1496 "-u dump core after parsing script",
1497 "-U allow unsafe operations",
1498 "-v print version number and patchlevel of perl",
1499 "-V[:variable] print perl configuration information",
1500 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1501 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1505 char **p = usage_msg;
1507 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1509 printf("\n %s", *p++);
1512 /* This routine handles any switches that can be given during run */
1515 moreswitches(char *s)
1524 rschar = scan_oct(s, 4, &numlen);
1526 if (rschar & ~((U8)~0))
1528 else if (!rschar && numlen >= 2)
1529 nrs = newSVpv("", 0);
1532 nrs = newSVpv(&ch, 1);
1538 splitstr = savepv(s + 1);
1552 if (*s == ':' || *s == '=') {
1553 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1557 perldb = PERLDB_ALL;
1564 if (isALPHA(s[1])) {
1565 static char debopts[] = "psltocPmfrxuLHXD";
1568 for (s++; *s && (d = strchr(debopts,*s)); s++)
1569 debug |= 1 << (d - debopts);
1573 for (s++; isDIGIT(*s); s++) ;
1575 debug |= 0x80000000;
1577 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1578 for (s++; isALNUM(*s); s++) ;
1588 inplace = savepv(s+1);
1590 for (s = inplace; *s && !isSPACE(*s); s++) ;
1594 case 'I': /* -I handled both here and in parse_perl() */
1597 while (*s && isSPACE(*s))
1601 for (e = s; *e && !isSPACE(*e); e++) ;
1602 p = savepvn(s, e-s);
1608 croak("No space allowed after -I");
1618 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1628 ors = SvPV(nrs, orslen);
1629 ors = savepvn(ors, orslen);
1633 forbid_setid("-M"); /* XXX ? */
1636 forbid_setid("-m"); /* XXX ? */
1641 /* -M-foo == 'no foo' */
1642 if (*s == '-') { use = "no "; ++s; }
1643 sv = newSVpv(use,0);
1645 /* We allow -M'Module qw(Foo Bar)' */
1646 while(isALNUM(*s) || *s==':') ++s;
1648 sv_catpv(sv, start);
1649 if (*(start-1) == 'm') {
1651 croak("Can't use '%c' after -mname", *s);
1652 sv_catpv( sv, " ()");
1655 sv_catpvn(sv, start, s-start);
1656 sv_catpv(sv, " split(/,/,q{");
1661 if (preambleav == NULL)
1662 preambleav = newAV();
1663 av_push(preambleav, sv);
1666 croak("No space allowed after -%c", *(s-1));
1683 croak("Too late for \"-T\" option");
1695 #if defined(SUBVERSION) && SUBVERSION > 0
1696 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1697 PATCHLEVEL, SUBVERSION, ARCHNAME);
1699 printf("\nThis is perl, version %s built for %s",
1700 patchlevel, ARCHNAME);
1702 #if defined(LOCAL_PATCH_COUNT)
1703 if (LOCAL_PATCH_COUNT > 0)
1704 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1705 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1708 printf("\n\nCopyright 1987-1997, Larry Wall\n");
1710 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1713 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1714 printf("djgpp v2 port (perl5004) by Laszlo Molnar, 1997\n");
1717 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1718 "Version 5 port Copyright (c) 1994-1997, Andreas Kaiser, Ilya Zakharevich\n");
1721 printf("atariST series port, ++jrb bammi@cadence.com\n");
1724 Perl may be copied only under the terms of either the Artistic License or the\n\
1725 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n");
1733 if (s[1] == '-') /* Additional switches on #! line. */
1744 #ifdef ALTERNATE_SHEBANG
1745 case 'S': /* OS/2 needs -S on "extproc" line. */
1753 croak("Can't emulate -%.1s on #! line",s);
1758 /* compliments of Tom Christiansen */
1760 /* unexec() can be found in the Gnu emacs distribution */
1771 prog = newSVpv(BIN_EXP);
1772 sv_catpv(prog, "/perl");
1773 file = newSVpv(origfilename);
1774 sv_catpv(file, ".perldump");
1776 status = unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1778 PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n",
1779 SvPVX(prog), SvPVX(file));
1780 PerlProc_exit(status);
1783 # include <lib$routines.h>
1784 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1786 ABORT(); /* for use with undump */
1792 init_main_stash(void)
1797 /* Note that strtab is a rather special HV. Assumptions are made
1798 about not iterating on it, and not adding tie magic to it.
1799 It is properly deallocated in perl_destruct() */
1801 HvSHAREKEYS_off(strtab); /* mandatory */
1802 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1803 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1805 curstash = defstash = newHV();
1806 curstname = newSVpv("main",4);
1807 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1808 SvREFCNT_dec(GvHV(gv));
1809 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1811 HvNAME(defstash) = savepv("main");
1812 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1814 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1815 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1817 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1818 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1819 sv_setpvn(ERRSV, "", 0);
1820 curstash = defstash;
1821 compiling.cop_stash = defstash;
1822 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1823 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1824 /* We must init $/ before switches are processed. */
1825 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1828 #ifdef CAN_PROTOTYPE
1830 open_script(char *scriptname, bool dosearch, SV *sv)
1833 open_script(scriptname,dosearch,sv)
1840 char *xfound = Nullch;
1841 char *xfailed = Nullch;
1845 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
1846 # define SEARCH_EXTS ".bat", ".cmd", NULL
1847 # define MAX_EXT_LEN 4
1850 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
1851 # define MAX_EXT_LEN 4
1854 # define SEARCH_EXTS ".pl", ".com", NULL
1855 # define MAX_EXT_LEN 4
1857 /* additional extensions to try in each dir if scriptname not found */
1859 char *ext[] = { SEARCH_EXTS };
1860 int extidx = 0, i = 0;
1861 char *curext = Nullch;
1863 # define MAX_EXT_LEN 0
1867 * If dosearch is true and if scriptname does not contain path
1868 * delimiters, search the PATH for scriptname.
1870 * If SEARCH_EXTS is also defined, will look for each
1871 * scriptname{SEARCH_EXTS} whenever scriptname is not found
1872 * while searching the PATH.
1874 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
1875 * proceeds as follows:
1876 * If DOSISH or VMSISH:
1877 * + look for ./scriptname{,.foo,.bar}
1878 * + search the PATH for scriptname{,.foo,.bar}
1881 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
1882 * this will not look in '.' if it's not in the PATH)
1886 # ifdef ALWAYS_DEFTYPES
1887 len = strlen(scriptname);
1888 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
1889 int hasdir, idx = 0, deftypes = 1;
1892 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
1895 int hasdir, idx = 0, deftypes = 1;
1898 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
1900 /* The first time through, just add SEARCH_EXTS to whatever we
1901 * already have, so we can check for default file types. */
1903 (!hasdir && my_trnlnm("DCL$PATH",tokenbuf,idx++)) )
1909 if ((strlen(tokenbuf) + strlen(scriptname)
1910 + MAX_EXT_LEN) >= sizeof tokenbuf)
1911 continue; /* don't search dir with too-long name */
1912 strcat(tokenbuf, scriptname);
1916 if (strEQ(scriptname, "-"))
1918 if (dosearch) { /* Look in '.' first. */
1919 char *cur = scriptname;
1921 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
1923 if (strEQ(ext[i++],curext)) {
1924 extidx = -1; /* already has an ext */
1929 DEBUG_p(PerlIO_printf(Perl_debug_log,
1930 "Looking for %s\n",cur));
1931 if (PerlLIO_stat(cur,&statbuf) >= 0) {
1939 if (cur == scriptname) {
1940 len = strlen(scriptname);
1941 if (len+MAX_EXT_LEN+1 >= sizeof(tokenbuf))
1943 cur = strcpy(tokenbuf, scriptname);
1945 } while (extidx >= 0 && ext[extidx] /* try an extension? */
1946 && strcpy(tokenbuf+len, ext[extidx++]));
1951 if (dosearch && !strchr(scriptname, '/')
1953 && !strchr(scriptname, '\\')
1955 && (s = PerlEnv_getenv("PATH"))) {
1958 bufend = s + strlen(s);
1959 while (s < bufend) {
1960 #if defined(atarist) || defined(DOSISH)
1965 && *s != ';'; len++, s++) {
1966 if (len < sizeof tokenbuf)
1969 if (len < sizeof tokenbuf)
1970 tokenbuf[len] = '\0';
1971 #else /* ! (atarist || DOSISH) */
1972 s = delimcpy(tokenbuf, tokenbuf + sizeof tokenbuf, s, bufend,
1975 #endif /* ! (atarist || DOSISH) */
1978 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tokenbuf)
1979 continue; /* don't search dir with too-long name */
1981 #if defined(atarist) || defined(DOSISH)
1982 && tokenbuf[len - 1] != '/'
1983 && tokenbuf[len - 1] != '\\'
1986 tokenbuf[len++] = '/';
1987 if (len == 2 && tokenbuf[0] == '.')
1989 (void)strcpy(tokenbuf + len, scriptname);
1993 len = strlen(tokenbuf);
1994 if (extidx > 0) /* reset after previous loop */
1998 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tokenbuf));
1999 retval = PerlLIO_stat(tokenbuf,&statbuf);
2001 } while ( retval < 0 /* not there */
2002 && extidx>=0 && ext[extidx] /* try an extension? */
2003 && strcpy(tokenbuf+len, ext[extidx++])
2008 if (S_ISREG(statbuf.st_mode)
2009 && cando(S_IRUSR,TRUE,&statbuf)
2011 && cando(S_IXUSR,TRUE,&statbuf)
2015 xfound = tokenbuf; /* bingo! */
2019 xfailed = savepv(tokenbuf);
2022 if (!xfound && !seen_dot && !xfailed && (PerlLIO_stat(scriptname,&statbuf) < 0))
2024 seen_dot = 1; /* Disable message. */
2026 croak("Can't %s %s%s%s",
2027 (xfailed ? "execute" : "find"),
2028 (xfailed ? xfailed : scriptname),
2029 (xfailed ? "" : " on PATH"),
2030 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2033 scriptname = xfound;
2036 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2037 char *s = scriptname + 8;
2046 origfilename = savepv(e_tmpname ? "-e" : scriptname);
2047 curcop->cop_filegv = gv_fetchfile(origfilename);
2048 if (strEQ(origfilename,"-"))
2050 if (fdscript >= 0) {
2051 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
2052 #if defined(HAS_FCNTL) && defined(F_SETFD)
2054 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2057 else if (preprocess) {
2058 char *cpp_cfg = CPPSTDIN;
2059 SV *cpp = NEWSV(0,0);
2060 SV *cmd = NEWSV(0,0);
2062 if (strEQ(cpp_cfg, "cppstdin"))
2063 sv_catpvf(cpp, "%s/", BIN_EXP);
2064 sv_catpv(cpp, cpp_cfg);
2067 sv_catpv(sv,PRIVLIB_EXP);
2071 sed %s -e \"/^[^#]/b\" \
2072 -e \"/^#[ ]*include[ ]/b\" \
2073 -e \"/^#[ ]*define[ ]/b\" \
2074 -e \"/^#[ ]*if[ ]/b\" \
2075 -e \"/^#[ ]*ifdef[ ]/b\" \
2076 -e \"/^#[ ]*ifndef[ ]/b\" \
2077 -e \"/^#[ ]*else/b\" \
2078 -e \"/^#[ ]*elif[ ]/b\" \
2079 -e \"/^#[ ]*undef[ ]/b\" \
2080 -e \"/^#[ ]*endif/b\" \
2083 (doextract ? "-e \"1,/^#/d\n\"" : ""),
2086 %s %s -e '/^[^#]/b' \
2087 -e '/^#[ ]*include[ ]/b' \
2088 -e '/^#[ ]*define[ ]/b' \
2089 -e '/^#[ ]*if[ ]/b' \
2090 -e '/^#[ ]*ifdef[ ]/b' \
2091 -e '/^#[ ]*ifndef[ ]/b' \
2092 -e '/^#[ ]*else/b' \
2093 -e '/^#[ ]*elif[ ]/b' \
2094 -e '/^#[ ]*undef[ ]/b' \
2095 -e '/^#[ ]*endif/b' \
2103 (doextract ? "-e '1,/^#/d\n'" : ""),
2105 scriptname, cpp, sv, CPPMINUS);
2107 #ifdef IAMSUID /* actually, this is caught earlier */
2108 if (euid != uid && !euid) { /* if running suidperl */
2110 (void)seteuid(uid); /* musn't stay setuid root */
2113 (void)setreuid((Uid_t)-1, uid);
2115 #ifdef HAS_SETRESUID
2116 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
2118 PerlProc_setuid(uid);
2122 if (PerlProc_geteuid() != uid)
2123 croak("Can't do seteuid!\n");
2125 #endif /* IAMSUID */
2126 rsfp = PerlProc_popen(SvPVX(cmd), "r");
2130 else if (!*scriptname) {
2131 forbid_setid("program input from stdin");
2132 rsfp = PerlIO_stdin();
2135 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2136 #if defined(HAS_FCNTL) && defined(F_SETFD)
2138 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2146 #ifndef IAMSUID /* in case script is not readable before setuid */
2147 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2148 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2150 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2151 croak("Can't do setuid\n");
2155 croak("Can't open perl script \"%s\": %s\n",
2156 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2161 validate_suid(char *validarg, char *scriptname)
2165 /* do we need to emulate setuid on scripts? */
2167 /* This code is for those BSD systems that have setuid #! scripts disabled
2168 * in the kernel because of a security problem. Merely defining DOSUID
2169 * in perl will not fix that problem, but if you have disabled setuid
2170 * scripts in the kernel, this will attempt to emulate setuid and setgid
2171 * on scripts that have those now-otherwise-useless bits set. The setuid
2172 * root version must be called suidperl or sperlN.NNN. If regular perl
2173 * discovers that it has opened a setuid script, it calls suidperl with
2174 * the same argv that it had. If suidperl finds that the script it has
2175 * just opened is NOT setuid root, it sets the effective uid back to the
2176 * uid. We don't just make perl setuid root because that loses the
2177 * effective uid we had before invoking perl, if it was different from the
2180 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2181 * be defined in suidperl only. suidperl must be setuid root. The
2182 * Configure script will set this up for you if you want it.
2189 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2190 croak("Can't stat script \"%s\"",origfilename);
2191 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2195 #ifndef HAS_SETREUID
2196 /* On this access check to make sure the directories are readable,
2197 * there is actually a small window that the user could use to make
2198 * filename point to an accessible directory. So there is a faint
2199 * chance that someone could execute a setuid script down in a
2200 * non-accessible directory. I don't know what to do about that.
2201 * But I don't think it's too important. The manual lies when
2202 * it says access() is useful in setuid programs.
2204 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2205 croak("Permission denied");
2207 /* If we can swap euid and uid, then we can determine access rights
2208 * with a simple stat of the file, and then compare device and
2209 * inode to make sure we did stat() on the same file we opened.
2210 * Then we just have to make sure he or she can execute it.
2213 struct stat tmpstatbuf;
2217 setreuid(euid,uid) < 0
2220 setresuid(euid,uid,(Uid_t)-1) < 0
2223 || PerlProc_getuid() != euid || PerlProc_geteuid() != uid)
2224 croak("Can't swap uid and euid"); /* really paranoid */
2225 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2226 croak("Permission denied"); /* testing full pathname here */
2227 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2228 tmpstatbuf.st_ino != statbuf.st_ino) {
2229 (void)PerlIO_close(rsfp);
2230 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2232 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2233 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2234 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2235 (long)statbuf.st_dev, (long)statbuf.st_ino,
2236 SvPVX(GvSV(curcop->cop_filegv)),
2237 (long)statbuf.st_uid, (long)statbuf.st_gid);
2238 (void)PerlProc_pclose(rsfp);
2240 croak("Permission denied\n");
2244 setreuid(uid,euid) < 0
2246 # if defined(HAS_SETRESUID)
2247 setresuid(uid,euid,(Uid_t)-1) < 0
2250 || PerlProc_getuid() != uid || PerlProc_geteuid() != euid)
2251 croak("Can't reswap uid and euid");
2252 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2253 croak("Permission denied\n");
2255 #endif /* HAS_SETREUID */
2256 #endif /* IAMSUID */
2258 if (!S_ISREG(statbuf.st_mode))
2259 croak("Permission denied");
2260 if (statbuf.st_mode & S_IWOTH)
2261 croak("Setuid/gid script is writable by world");
2262 doswitches = FALSE; /* -s is insecure in suid */
2264 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2265 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2266 croak("No #! line");
2267 s = SvPV(linestr,na)+2;
2269 while (!isSPACE(*s)) s++;
2270 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2271 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2272 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2273 croak("Not a perl script");
2274 while (*s == ' ' || *s == '\t') s++;
2276 * #! arg must be what we saw above. They can invoke it by
2277 * mentioning suidperl explicitly, but they may not add any strange
2278 * arguments beyond what #! says if they do invoke suidperl that way.
2280 len = strlen(validarg);
2281 if (strEQ(validarg," PHOOEY ") ||
2282 strnNE(s,validarg,len) || !isSPACE(s[len]))
2283 croak("Args must match #! line");
2286 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2287 euid == statbuf.st_uid)
2289 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2290 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2291 #endif /* IAMSUID */
2293 if (euid) { /* oops, we're not the setuid root perl */
2294 (void)PerlIO_close(rsfp);
2297 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2299 croak("Can't do setuid\n");
2302 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2304 (void)setegid(statbuf.st_gid);
2307 (void)setregid((Gid_t)-1,statbuf.st_gid);
2309 #ifdef HAS_SETRESGID
2310 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2312 PerlProc_setgid(statbuf.st_gid);
2316 if (PerlProc_getegid() != statbuf.st_gid)
2317 croak("Can't do setegid!\n");
2319 if (statbuf.st_mode & S_ISUID) {
2320 if (statbuf.st_uid != euid)
2322 (void)seteuid(statbuf.st_uid); /* all that for this */
2325 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2327 #ifdef HAS_SETRESUID
2328 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2330 PerlProc_setuid(statbuf.st_uid);
2334 if (PerlProc_geteuid() != statbuf.st_uid)
2335 croak("Can't do seteuid!\n");
2337 else if (uid) { /* oops, mustn't run as root */
2339 (void)seteuid((Uid_t)uid);
2342 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2344 #ifdef HAS_SETRESUID
2345 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2347 PerlProc_setuid((Uid_t)uid);
2351 if (PerlProc_geteuid() != uid)
2352 croak("Can't do seteuid!\n");
2355 if (!cando(S_IXUSR,TRUE,&statbuf))
2356 croak("Permission denied\n"); /* they can't do this */
2359 else if (preprocess)
2360 croak("-P not allowed for setuid/setgid script\n");
2361 else if (fdscript >= 0)
2362 croak("fd script not allowed in suidperl\n");
2364 croak("Script is not setuid/setgid in suidperl\n");
2366 /* We absolutely must clear out any saved ids here, so we */
2367 /* exec the real perl, substituting fd script for scriptname. */
2368 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2369 PerlIO_rewind(rsfp);
2370 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2371 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2372 if (!origargv[which])
2373 croak("Permission denied");
2374 origargv[which] = savepv(form("/dev/fd/%d/%s",
2375 PerlIO_fileno(rsfp), origargv[which]));
2376 #if defined(HAS_FCNTL) && defined(F_SETFD)
2377 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2379 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2380 croak("Can't do setuid\n");
2381 #endif /* IAMSUID */
2383 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2384 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2386 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2387 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2389 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2392 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2393 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2394 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2395 /* not set-id, must be wrapped */
2401 find_beginning(void)
2403 register char *s, *s2;
2405 /* skip forward in input to the real script? */
2409 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2410 croak("No Perl script found in input\n");
2411 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2412 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2414 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2416 while (*s == ' ' || *s == '\t') s++;
2418 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2419 if (strnEQ(s2-4,"perl",4))
2421 while (s = moreswitches(s)) ;
2423 if (cddir && PerlDir_chdir(cddir) < 0)
2424 croak("Can't chdir to %s",cddir);
2432 uid = (int)PerlProc_getuid();
2433 euid = (int)PerlProc_geteuid();
2434 gid = (int)PerlProc_getgid();
2435 egid = (int)PerlProc_getegid();
2440 tainting |= (uid && (euid != uid || egid != gid));
2444 forbid_setid(char *s)
2447 croak("No %s allowed while running setuid", s);
2449 croak("No %s allowed while running setgid", s);
2456 curstash = debstash;
2457 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2459 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2460 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2461 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2462 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2463 sv_setiv(DBsingle, 0);
2464 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2465 sv_setiv(DBtrace, 0);
2466 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2467 sv_setiv(DBsignal, 0);
2468 curstash = defstash;
2472 init_stacks(ARGSproto)
2475 mainstack = curstack; /* remember in case we switch stacks */
2476 AvREAL_off(curstack); /* not a real array */
2477 av_extend(curstack,127);
2479 stack_base = AvARRAY(curstack);
2480 stack_sp = stack_base;
2481 stack_max = stack_base + 127;
2483 cxstack_max = 8192 / sizeof(PERL_CONTEXT) - 2; /* Use most of 8K. */
2484 New(50,cxstack,cxstack_max + 1,PERL_CONTEXT);
2487 New(50,tmps_stack,128,SV*);
2493 * The following stacks almost certainly should be per-interpreter,
2494 * but for now they're not. XXX
2498 markstack_ptr = markstack;
2500 New(54,markstack,64,I32);
2501 markstack_ptr = markstack;
2502 markstack_max = markstack + 64;
2508 New(54,scopestack,32,I32);
2510 scopestack_max = 32;
2516 New(54,savestack,128,ANY);
2518 savestack_max = 128;
2524 New(54,retstack,16,OP*);
2535 Safefree(tmps_stack);
2543 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2556 subname = newSVpv("main",4);
2560 init_predump_symbols(void)
2566 sv_setpvn(perl_get_sv("\"", TRUE), " ", 1);
2567 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2568 GvMULTI_on(stdingv);
2569 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2570 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2572 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2574 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2576 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2578 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2580 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2582 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2583 GvMULTI_on(othergv);
2584 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2585 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2587 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2589 statname = NEWSV(66,0); /* last filename we did stat on */
2592 osname = savepv(OSNAME);
2596 init_postdump_symbols(register int argc, register char **argv, register char **env)
2603 argc--,argv++; /* skip name of script */
2605 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2608 if (argv[0][1] == '-') {
2612 if (s = strchr(argv[0], '=')) {
2614 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2617 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2620 toptarget = NEWSV(0,0);
2621 sv_upgrade(toptarget, SVt_PVFM);
2622 sv_setpvn(toptarget, "", 0);
2623 bodytarget = NEWSV(0,0);
2624 sv_upgrade(bodytarget, SVt_PVFM);
2625 sv_setpvn(bodytarget, "", 0);
2626 formtarget = bodytarget;
2629 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2630 sv_setpv(GvSV(tmpgv),origfilename);
2631 magicname("0", "0", 1);
2633 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2634 sv_setpv(GvSV(tmpgv),origargv[0]);
2635 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2637 (void)gv_AVadd(argvgv);
2638 av_clear(GvAVn(argvgv));
2639 for (; argc > 0; argc--,argv++) {
2640 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2643 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2647 hv_magic(hv, envgv, 'E');
2648 #ifndef VMS /* VMS doesn't have environ array */
2649 /* Note that if the supplied env parameter is actually a copy
2650 of the global environ then it may now point to free'd memory
2651 if the environment has been modified since. To avoid this
2652 problem we treat env==NULL as meaning 'use the default'
2657 environ[0] = Nullch;
2658 for (; *env; env++) {
2659 if (!(s = strchr(*env,'=')))
2662 #if defined(WIN32) || defined(MSDOS)
2665 sv = newSVpv(s--,0);
2666 (void)hv_store(hv, *env, s - *env, sv, 0);
2668 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2669 /* Sins of the RTL. See note in my_setenv(). */
2670 (void)PerlEnv_putenv(savepv(*env));
2674 #ifdef DYNAMIC_ENV_FETCH
2675 HvNAME(hv) = savepv(ENV_HV_NAME);
2679 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2680 sv_setiv(GvSV(tmpgv), (IV)getpid());
2689 s = PerlEnv_getenv("PERL5LIB");
2693 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2695 /* Treat PERL5?LIB as a possible search list logical name -- the
2696 * "natural" VMS idiom for a Unix path string. We allow each
2697 * element to be a set of |-separated directories for compatibility.
2701 if (my_trnlnm("PERL5LIB",buf,0))
2702 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2704 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2708 /* Use the ~-expanded versions of APPLLIB (undocumented),
2709 ARCHLIB PRIVLIB SITEARCH SITELIB and OLDARCHLIB
2712 incpush(APPLLIB_EXP, FALSE);
2716 incpush(ARCHLIB_EXP, FALSE);
2719 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2721 incpush(PRIVLIB_EXP, FALSE);
2724 incpush(SITEARCH_EXP, FALSE);
2727 incpush(SITELIB_EXP, FALSE);
2729 #ifdef OLDARCHLIB_EXP /* 5.00[01] compatibility */
2730 incpush(OLDARCHLIB_EXP, FALSE);
2734 incpush(".", FALSE);
2738 # define PERLLIB_SEP ';'
2741 # define PERLLIB_SEP '|'
2743 # define PERLLIB_SEP ':'
2746 #ifndef PERLLIB_MANGLE
2747 # define PERLLIB_MANGLE(s,n) (s)
2751 incpush(char *p, int addsubdirs)
2753 SV *subdir = Nullsv;
2759 subdir = NEWSV(55,0);
2760 if (!archpat_auto) {
2761 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2762 + sizeof("//auto"));
2763 New(55, archpat_auto, len, char);
2764 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2766 for (len = sizeof(ARCHNAME) + 2;
2767 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2768 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2773 /* Break at all separators */
2775 SV *libdir = NEWSV(55,0);
2778 /* skip any consecutive separators */
2779 while ( *p == PERLLIB_SEP ) {
2780 /* Uncomment the next line for PATH semantics */
2781 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2785 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2786 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2791 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2792 p = Nullch; /* break out */
2796 * BEFORE pushing libdir onto @INC we may first push version- and
2797 * archname-specific sub-directories.
2800 struct stat tmpstatbuf;
2805 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2807 while (unix[len-1] == '/') len--; /* Cosmetic */
2808 sv_usepvn(libdir,unix,len);
2811 PerlIO_printf(PerlIO_stderr(),
2812 "Failed to unixify @INC element \"%s\"\n",
2815 /* .../archname/version if -d .../archname/version/auto */
2816 sv_setsv(subdir, libdir);
2817 sv_catpv(subdir, archpat_auto);
2818 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2819 S_ISDIR(tmpstatbuf.st_mode))
2820 av_push(GvAVn(incgv),
2821 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2823 /* .../archname if -d .../archname/auto */
2824 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2825 strlen(patchlevel) + 1, "", 0);
2826 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2827 S_ISDIR(tmpstatbuf.st_mode))
2828 av_push(GvAVn(incgv),
2829 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2832 /* finally push this lib directory on the end of @INC */
2833 av_push(GvAVn(incgv), libdir);
2836 SvREFCNT_dec(subdir);
2840 STATIC struct perl_thread *
2843 struct perl_thread *thr;
2846 Newz(53, thr, 1, struct perl_thread);
2847 curcop = &compiling;
2848 thr->cvcache = newHV();
2849 thr->threadsv = newAV();
2850 /* thr->threadsvp is set when find_threadsv is called */
2851 thr->specific = newAV();
2852 thr->errhv = newHV();
2853 thr->flags = THRf_R_JOINABLE;
2854 MUTEX_INIT(&thr->mutex);
2855 /* Handcraft thrsv similarly to mess_sv */
2856 New(53, thrsv, 1, SV);
2857 Newz(53, xpv, 1, XPV);
2858 SvFLAGS(thrsv) = SVt_PV;
2859 SvANY(thrsv) = (void*)xpv;
2860 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2861 SvPVX(thrsv) = (char*)thr;
2862 SvCUR_set(thrsv, sizeof(thr));
2863 SvLEN_set(thrsv, sizeof(thr));
2864 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2866 curcop = &compiling;
2869 MUTEX_LOCK(&threads_mutex);
2874 MUTEX_UNLOCK(&threads_mutex);
2876 #ifdef HAVE_THREAD_INTERN
2877 init_thread_intern(thr);
2880 #ifdef SET_THREAD_SELF
2881 SET_THREAD_SELF(thr);
2883 thr->self = pthread_self();
2884 #endif /* SET_THREAD_SELF */
2888 * These must come after the SET_THR because sv_setpvn does
2889 * SvTAINT and the taint fields require dTHR.
2891 toptarget = NEWSV(0,0);
2892 sv_upgrade(toptarget, SVt_PVFM);
2893 sv_setpvn(toptarget, "", 0);
2894 bodytarget = NEWSV(0,0);
2895 sv_upgrade(bodytarget, SVt_PVFM);
2896 sv_setpvn(bodytarget, "", 0);
2897 formtarget = bodytarget;
2898 thr->errsv = newSVpv("", 0);
2901 #endif /* USE_THREADS */
2904 call_list(I32 oldscope, AV *paramList)
2907 line_t oldline = curcop->cop_line;
2912 while (AvFILL(paramList) >= 0) {
2913 CV *cv = (CV*)av_shift(paramList);
2922 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2923 (void)SvPV(atsv, len);
2926 curcop = &compiling;
2927 curcop->cop_line = oldline;
2928 if (paramList == beginav)
2929 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2931 sv_catpv(atsv, "END failed--cleanup aborted");
2932 while (scopestack_ix > oldscope)
2934 croak("%s", SvPVX(atsv));
2942 /* my_exit() was called */
2943 while (scopestack_ix > oldscope)
2946 curstash = defstash;
2948 call_list(oldscope, endav);
2950 curcop = &compiling;
2951 curcop->cop_line = oldline;
2953 if (paramList == beginav)
2954 croak("BEGIN failed--compilation aborted");
2956 croak("END failed--cleanup aborted");
2962 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2967 curcop = &compiling;
2968 curcop->cop_line = oldline;
2981 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2982 thr, (unsigned long) status));
2983 #endif /* USE_THREADS */
2992 STATUS_NATIVE_SET(status);
2999 my_failure_exit(void)
3002 if (vaxc$errno & 1) {
3003 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
3004 STATUS_NATIVE_SET(44);
3007 if (!vaxc$errno && errno) /* unlikely */
3008 STATUS_NATIVE_SET(44);
3010 STATUS_NATIVE_SET(vaxc$errno);
3014 STATUS_POSIX_SET(errno);
3015 else if (STATUS_POSIX == 0)
3016 STATUS_POSIX_SET(255);
3025 register PERL_CONTEXT *cx;
3034 (void)UNLINK(e_tmpname);
3035 Safefree(e_tmpname);
3039 if (cxstack_ix >= 0) {