/* perl.c * * Copyright (c) 1987-1999 Larry Wall * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * "A ship then new they built for him/of mithril and of elven glass" --Bilbo */ #include "EXTERN.h" #include "perl.h" /* XXX If this causes problems, set i_unistd=undef in the hint file. */ #ifdef I_UNISTD #include #endif #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) char *getenv _((char *)); /* Usually in */ #endif #ifdef I_FCNTL #include #endif #ifdef I_SYS_FILE #include #endif #ifdef IAMSUID #ifndef DOSUID #define DOSUID #endif #endif #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW #ifdef DOSUID #undef DOSUID #endif #endif #ifdef PERL_OBJECT static I32 read_e_script _((CPerlObj* pPerl, int idx, SV *buf_sv, int maxlen)); #else static void find_beginning _((void)); static void forbid_setid _((char *)); static void incpush _((char *, int)); static void init_interp _((void)); static void init_ids _((void)); static void init_debugger _((void)); static void init_lexer _((void)); static void init_main_stash _((void)); static void *perl_parse_body _((va_list args)); static void *perl_run_body _((va_list args)); static void *perl_call_body _((va_list args)); static void perl_call_xbody _((OP *myop, int is_eval)); static void *call_list_body _((va_list args)); #ifdef USE_THREADS static struct perl_thread * init_main_thread _((void)); #endif /* USE_THREADS */ static void init_perllib _((void)); static void init_postdump_symbols _((int, char **, char **)); static void init_predump_symbols _((void)); static void my_exit_jump _((void)) __attribute__((noreturn)); static void nuke_stacks _((void)); static void open_script _((char *, bool, SV *, int *fd)); static void usage _((char *)); #ifdef IAMSUID static int fd_on_nosuid_fs _((int)); #endif static void validate_suid _((char *, char*, int)); static I32 read_e_script _((int idx, SV *buf_sv, int maxlen)); #endif #ifdef PERL_OBJECT CPerlObj* perl_alloc(IPerlMem* ipM, IPerlEnv* ipE, IPerlStdIO* ipStd, IPerlLIO* ipLIO, IPerlDir* ipD, IPerlSock* ipS, IPerlProc* ipP) { CPerlObj* pPerl = new(ipM) CPerlObj(ipM, ipE, ipStd, ipLIO, ipD, ipS, ipP); if(pPerl != NULL) pPerl->Init(); return pPerl; } #else PerlInterpreter * perl_alloc(void) { PerlInterpreter *sv_interp; PL_curinterp = 0; New(53, sv_interp, 1, PerlInterpreter); return sv_interp; } #endif /* PERL_OBJECT */ void #ifdef PERL_OBJECT perl_construct(void) #else perl_construct(register PerlInterpreter *sv_interp) #endif { #ifdef USE_THREADS int i; #ifndef FAKE_THREADS struct perl_thread *thr; #endif /* FAKE_THREADS */ #endif /* USE_THREADS */ #ifndef PERL_OBJECT if (!(PL_curinterp = sv_interp)) return; #endif #ifdef MULTIPLICITY ++PL_ninterps; Zero(sv_interp, 1, PerlInterpreter); #endif /* Init the real globals (and main thread)? */ if (!PL_linestr) { #ifdef USE_THREADS INIT_THREADS; #ifdef ALLOC_THREAD_KEY ALLOC_THREAD_KEY; #else if (pthread_key_create(&PL_thr_key, 0)) croak("panic: pthread_key_create"); #endif MUTEX_INIT(&PL_sv_mutex); /* * Safe to use basic SV functions from now on (though * not things like mortals or tainting yet). */ MUTEX_INIT(&PL_eval_mutex); COND_INIT(&PL_eval_cond); MUTEX_INIT(&PL_threads_mutex); COND_INIT(&PL_nthreads_cond); #ifdef EMULATE_ATOMIC_REFCOUNTS MUTEX_INIT(&PL_svref_mutex); #endif /* EMULATE_ATOMIC_REFCOUNTS */ MUTEX_INIT(&PL_cred_mutex); thr = init_main_thread(); #endif /* USE_THREADS */ PL_protect = FUNC_NAME_TO_PTR(default_protect); /* for exceptions */ PL_curcop = &PL_compiling; /* needed by ckWARN, right away */ PL_linestr = NEWSV(65,79); sv_upgrade(PL_linestr,SVt_PVIV); if (!SvREADONLY(&PL_sv_undef)) { /* set read-only and try to insure than we wont see REFCNT==0 very often */ SvREADONLY_on(&PL_sv_undef); SvREFCNT(&PL_sv_undef) = (~(U32)0)/2; sv_setpv(&PL_sv_no,PL_No); SvNV(&PL_sv_no); SvREADONLY_on(&PL_sv_no); SvREFCNT(&PL_sv_no) = (~(U32)0)/2; sv_setpv(&PL_sv_yes,PL_Yes); SvNV(&PL_sv_yes); SvREADONLY_on(&PL_sv_yes); SvREFCNT(&PL_sv_yes) = (~(U32)0)/2; } #ifdef PERL_OBJECT /* TODO: */ /* PL_sighandlerp = sighandler; */ #else PL_sighandlerp = sighandler; #endif PL_pidstatus = newHV(); #ifdef MSDOS /* * There is no way we can refer to them from Perl so close them to save * space. The other alternative would be to provide STDAUX and STDPRN * filehandles. */ (void)fclose(stdaux); (void)fclose(stdprn); #endif } PL_nrs = newSVpvn("\n", 1); PL_rs = SvREFCNT_inc(PL_nrs); init_stacks(ARGS); #ifdef MULTIPLICITY init_interp(); PL_perl_destruct_level = 1; #else if (PL_perl_destruct_level > 0) init_interp(); #endif init_ids(); PL_lex_state = LEX_NOTPARSING; JMPENV_BOOTSTRAP; STATUS_ALL_SUCCESS; SET_NUMERIC_STANDARD(); #if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0 sprintf(PL_patchlevel, "%7.5f", (double) PERL_REVISION + ((double) PERL_VERSION / (double) 1000) + ((double) PERL_SUBVERSION / (double) 100000)); #else sprintf(PL_patchlevel, "%5.3f", (double) PERL_REVISION + ((double) PERL_VERSION / (double) 1000)); #endif #if defined(LOCAL_PATCH_COUNT) PL_localpatches = local_patches; /* For possible -v */ #endif PerlIO_init(); /* Hook to IO system */ PL_fdpid = newAV(); /* for remembering popen pids by fd */ PL_modglobal = newHV(); /* pointers to per-interpreter module globals */ DEBUG( { New(51,PL_debname,128,char); New(52,PL_debdelim,128,char); } ) ENTER; } void #ifdef PERL_OBJECT perl_destruct(void) #else perl_destruct(register PerlInterpreter *sv_interp) #endif { dTHR; int destruct_level; /* 0=none, 1=full, 2=full with checks */ I32 last_sv_count; HV *hv; #ifdef USE_THREADS Thread t; #endif /* USE_THREADS */ #ifndef PERL_OBJECT if (!(PL_curinterp = sv_interp)) return; #endif #ifdef USE_THREADS #ifndef FAKE_THREADS /* Pass 1 on any remaining threads: detach joinables, join zombies */ retry_cleanup: MUTEX_LOCK(&PL_threads_mutex); DEBUG_S(PerlIO_printf(PerlIO_stderr(), "perl_destruct: waiting for %d threads...\n", PL_nthreads - 1)); for (t = thr->next; t != thr; t = t->next) { MUTEX_LOCK(&t->mutex); switch (ThrSTATE(t)) { AV *av; case THRf_ZOMBIE: DEBUG_S(PerlIO_printf(PerlIO_stderr(), "perl_destruct: joining zombie %p\n", t)); ThrSETSTATE(t, THRf_DEAD); MUTEX_UNLOCK(&t->mutex); PL_nthreads--; /* * The SvREFCNT_dec below may take a long time (e.g. av * may contain an object scalar whose destructor gets * called) so we have to unlock threads_mutex and start * all over again. */ MUTEX_UNLOCK(&PL_threads_mutex); JOIN(t, &av); SvREFCNT_dec((SV*)av); DEBUG_S(PerlIO_printf(PerlIO_stderr(), "perl_destruct: joined zombie %p OK\n", t)); goto retry_cleanup; case THRf_R_JOINABLE: DEBUG_S(PerlIO_printf(PerlIO_stderr(), "perl_destruct: detaching thread %p\n", t)); ThrSETSTATE(t, THRf_R_DETACHED); /* * We unlock threads_mutex and t->mutex in the opposite order * from which we locked them just so that DETACH won't * deadlock if it panics. It's only a breach of good style * not a bug since they are unlocks not locks. */ MUTEX_UNLOCK(&PL_threads_mutex); DETACH(t); MUTEX_UNLOCK(&t->mutex); goto retry_cleanup; default: DEBUG_S(PerlIO_printf(PerlIO_stderr(), "perl_destruct: ignoring %p (state %u)\n", t, ThrSTATE(t))); MUTEX_UNLOCK(&t->mutex); /* fall through and out */ } } /* We leave the above "Pass 1" loop with threads_mutex still locked */ /* Pass 2 on remaining threads: wait for the thread count to drop to one */ while (PL_nthreads > 1) { DEBUG_S(PerlIO_printf(PerlIO_stderr(), "perl_destruct: final wait for %d threads\n", PL_nthreads - 1)); COND_WAIT(&PL_nthreads_cond, &PL_threads_mutex); } /* At this point, we're the last thread */ MUTEX_UNLOCK(&PL_threads_mutex); DEBUG_S(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n")); MUTEX_DESTROY(&PL_threads_mutex); COND_DESTROY(&PL_nthreads_cond); #endif /* !defined(FAKE_THREADS) */ #endif /* USE_THREADS */ destruct_level = PL_perl_destruct_level; #ifdef DEBUGGING { char *s; if (s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL")) { int i = atoi(s); if (destruct_level < i) destruct_level = i; } } #endif LEAVE; FREETMPS; #ifdef MULTIPLICITY --PL_ninterps; #endif /* We must account for everything. */ /* Destroy the main CV and syntax tree */ if (PL_main_root) { PL_curpad = AvARRAY(PL_comppad); op_free(PL_main_root); PL_main_root = Nullop; } PL_curcop = &PL_compiling; PL_main_start = Nullop; SvREFCNT_dec(PL_main_cv); PL_main_cv = Nullcv; PL_dirty = TRUE; if (PL_sv_objcount) { /* * Try to destruct global references. We do this first so that the * destructors and destructees still exist. Some sv's might remain. * Non-referenced objects are on their own. */ sv_clean_objs(); } /* unhook hooks which will soon be, or use, destroyed data */ SvREFCNT_dec(PL_warnhook); PL_warnhook = Nullsv; SvREFCNT_dec(PL_diehook); PL_diehook = Nullsv; SvREFCNT_dec(PL_parsehook); PL_parsehook = Nullsv; /* call exit list functions */ while (PL_exitlistlen-- > 0) PL_exitlist[PL_exitlistlen].fn(PERL_OBJECT_THIS_ PL_exitlist[PL_exitlistlen].ptr); Safefree(PL_exitlist); if (destruct_level == 0){ DEBUG_P(debprofdump()); /* The exit() function will do everything that needs doing. */ return; } /* loosen bonds of global variables */ if(PL_rsfp) { (void)PerlIO_close(PL_rsfp); PL_rsfp = Nullfp; } /* Filters for program text */ SvREFCNT_dec(PL_rsfp_filters); PL_rsfp_filters = Nullav; /* switches */ PL_preprocess = FALSE; PL_minus_n = FALSE; PL_minus_p = FALSE; PL_minus_l = FALSE; PL_minus_a = FALSE; PL_minus_F = FALSE; PL_doswitches = FALSE; PL_dowarn = G_WARN_OFF; PL_doextract = FALSE; PL_sawampersand = FALSE; /* must save all match strings */ PL_sawstudy = FALSE; /* do fbm_instr on all strings */ PL_sawvec = FALSE; PL_unsafe = FALSE; Safefree(PL_inplace); PL_inplace = Nullch; if (PL_e_script) { SvREFCNT_dec(PL_e_script); PL_e_script = Nullsv; } /* magical thingies */ Safefree(PL_ofs); /* $, */ PL_ofs = Nullch; Safefree(PL_ors); /* $\ */ PL_ors = Nullch; SvREFCNT_dec(PL_rs); /* $/ */ PL_rs = Nullsv; SvREFCNT_dec(PL_nrs); /* $/ helper */ PL_nrs = Nullsv; PL_multiline = 0; /* $* */ SvREFCNT_dec(PL_statname); PL_statname = Nullsv; PL_statgv = Nullgv; /* defgv, aka *_ should be taken care of elsewhere */ /* clean up after study() */ SvREFCNT_dec(PL_lastscream); PL_lastscream = Nullsv; Safefree(PL_screamfirst); PL_screamfirst = 0; Safefree(PL_screamnext); PL_screamnext = 0; /* startup and shutdown function lists */ SvREFCNT_dec(PL_beginav); SvREFCNT_dec(PL_endav); SvREFCNT_dec(PL_initav); PL_beginav = Nullav; PL_endav = Nullav; PL_initav = Nullav; /* shortcuts just get cleared */ PL_envgv = Nullgv; PL_siggv = Nullgv; PL_incgv = Nullgv; PL_hintgv = Nullgv; PL_errgv = Nullgv; PL_argvgv = Nullgv; PL_argvoutgv = Nullgv; PL_stdingv = Nullgv; PL_last_in_gv = Nullgv; PL_replgv = Nullgv; /* reset so print() ends up where we expect */ setdefout(Nullgv); /* Prepare to destruct main symbol table. */ hv = PL_defstash; PL_defstash = 0; SvREFCNT_dec(hv); FREETMPS; if (destruct_level >= 2) { if (PL_scopestack_ix != 0) warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n", (long)PL_scopestack_ix); if (PL_savestack_ix != 0) warn("Unbalanced saves: %ld more saves than restores\n", (long)PL_savestack_ix); if (PL_tmps_floor != -1) warn("Unbalanced tmps: %ld more allocs than frees\n", (long)PL_tmps_floor + 1); if (cxstack_ix != -1) warn("Unbalanced context: %ld more PUSHes than POPs\n", (long)cxstack_ix + 1); } /* Now absolutely destruct everything, somehow or other, loops or no. */ last_sv_count = 0; SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */ while (PL_sv_count != 0 && PL_sv_count != last_sv_count) { last_sv_count = PL_sv_count; sv_clean_all(); } SvFLAGS(PL_strtab) &= ~SVTYPEMASK; SvFLAGS(PL_strtab) |= SVt_PVHV; /* Destruct the global string table. */ { /* Yell and reset the HeVAL() slots that are still holding refcounts, * so that sv_free() won't fail on them. */ I32 riter; I32 max; HE *hent; HE **array; riter = 0; max = HvMAX(PL_strtab); array = HvARRAY(PL_strtab); hent = array[0]; for (;;) { if (hent) { warn("Unbalanced string table refcount: (%d) for \"%s\"", HeVAL(hent) - Nullsv, HeKEY(hent)); HeVAL(hent) = Nullsv; hent = HeNEXT(hent); } if (!hent) { if (++riter > max) break; hent = array[riter]; } } } SvREFCNT_dec(PL_strtab); if (PL_sv_count != 0) warn("Scalars leaked: %ld\n", (long)PL_sv_count); sv_free_arenas(); /* No SVs have survived, need to clean out */ PL_linestr = NULL; PL_pidstatus = Nullhv; Safefree(PL_origfilename); Safefree(PL_archpat_auto); Safefree(PL_reg_start_tmp); if (PL_reg_curpm) Safefree(PL_reg_curpm); Safefree(HeKEY_hek(&PL_hv_fetch_ent_mh)); Safefree(PL_op_mask); nuke_stacks(); PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */ DEBUG_P(debprofdump()); #ifdef USE_THREADS MUTEX_DESTROY(&PL_strtab_mutex); MUTEX_DESTROY(&PL_sv_mutex); MUTEX_DESTROY(&PL_eval_mutex); MUTEX_DESTROY(&PL_cred_mutex); COND_DESTROY(&PL_eval_cond); #ifdef EMULATE_ATOMIC_REFCOUNTS MUTEX_DESTROY(&PL_svref_mutex); #endif /* EMULATE_ATOMIC_REFCOUNTS */ /* As the penultimate thing, free the non-arena SV for thrsv */ Safefree(SvPVX(PL_thrsv)); Safefree(SvANY(PL_thrsv)); Safefree(PL_thrsv); PL_thrsv = Nullsv; #endif /* USE_THREADS */ /* As the absolutely last thing, free the non-arena SV for mess() */ if (PL_mess_sv) { /* it could have accumulated taint magic */ if (SvTYPE(PL_mess_sv) >= SVt_PVMG) { MAGIC* mg; MAGIC* moremagic; for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) { moremagic = mg->mg_moremagic; if (mg->mg_ptr && mg->mg_type != 'g' && mg->mg_len >= 0) Safefree(mg->mg_ptr); Safefree(mg); } } /* we know that type >= SVt_PV */ SvOOK_off(PL_mess_sv); Safefree(SvPVX(PL_mess_sv)); Safefree(SvANY(PL_mess_sv)); Safefree(PL_mess_sv); PL_mess_sv = Nullsv; } } void #ifdef PERL_OBJECT perl_free(void) #else perl_free(PerlInterpreter *sv_interp) #endif { #ifdef PERL_OBJECT Safefree(this); #else if (!(PL_curinterp = sv_interp)) return; Safefree(sv_interp); #endif } void #ifdef PERL_OBJECT perl_atexit(void (*fn) (CPerlObj*,void *), void *ptr) #else perl_atexit(void (*fn) (void *), void *ptr) #endif { Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry); PL_exitlist[PL_exitlistlen].fn = fn; PL_exitlist[PL_exitlistlen].ptr = ptr; ++PL_exitlistlen; } #ifdef PERL_OBJECT typedef void (*xs_init_t)(CPerlObj*); #else typedef void (*xs_init_t)(void); #endif int #ifdef PERL_OBJECT perl_parse(xs_init_t xsinit, int argc, char **argv, char **env) #else perl_parse(PerlInterpreter *sv_interp, xs_init_t xsinit, int argc, char **argv, char **env) #endif { dTHR; I32 oldscope; int ret; #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW #ifdef IAMSUID #undef IAMSUID croak("suidperl is no longer needed since the kernel can now execute\n\ setuid perl scripts securely.\n"); #endif #endif #ifndef PERL_OBJECT if (!(PL_curinterp = sv_interp)) return 255; #endif #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__)) _dyld_lookup_and_bind ("__environ", (unsigned long *) &environ_pointer, NULL); #endif /* environ */ PL_origargv = argv; PL_origargc = argc; #ifndef VMS /* VMS doesn't have environ array */ PL_origenviron = environ; #endif if (PL_do_undump) { /* Come here if running an undumped a.out. */ PL_origfilename = savepv(argv[0]); PL_do_undump = FALSE; cxstack_ix = -1; /* start label stack again */ init_ids(); init_postdump_symbols(argc,argv,env); return 0; } if (PL_main_root) { PL_curpad = AvARRAY(PL_comppad); op_free(PL_main_root); PL_main_root = Nullop; } PL_main_start = Nullop; SvREFCNT_dec(PL_main_cv); PL_main_cv = Nullcv; time(&PL_basetime); oldscope = PL_scopestack_ix; PL_dowarn = G_WARN_OFF; CALLPROTECT(&ret, FUNC_NAME_TO_PTR(perl_parse_body), env, xsinit); switch (ret) { case 0: return 0; case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ while (PL_scopestack_ix > oldscope) LEAVE; FREETMPS; PL_curstash = PL_defstash; if (PL_endav) call_list(oldscope, PL_endav); return STATUS_NATIVE_EXPORT; case 3: PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); return 1; } return 0; } STATIC void * perl_parse_body(va_list args) { dTHR; int argc = PL_origargc; char **argv = PL_origargv; char **env = va_arg(args, char**); char *scriptname = NULL; int fdscript = -1; VOL bool dosearch = FALSE; char *validarg = ""; AV* comppadlist; register SV *sv; register char *s; xs_init_t xsinit = va_arg(args, xs_init_t); sv_setpvn(PL_linestr,"",0); sv = newSVpvn("",0); /* first used for -I flags */ SAVEFREESV(sv); init_main_stash(); for (argc--,argv++; argc > 0; argc--,argv++) { if (argv[0][0] != '-' || !argv[0][1]) break; #ifdef DOSUID if (*validarg) validarg = " PHOOEY "; else validarg = argv[0]; #endif s = argv[0]+1; reswitch: switch (*s) { #ifndef PERL_STRICT_CR case '\r': #endif case ' ': case '0': case 'F': case 'a': case 'c': case 'd': case 'D': case 'h': case 'i': case 'l': case 'M': case 'm': case 'n': case 'p': case 's': case 'u': case 'U': case 'v': case 'W': case 'X': case 'w': if (s = moreswitches(s)) goto reswitch; break; case 'T': PL_tainting = TRUE; s++; goto reswitch; case 'e': if (PL_euid != PL_uid || PL_egid != PL_gid) croak("No -e allowed in setuid scripts"); if (!PL_e_script) { PL_e_script = newSVpvn("",0); filter_add(read_e_script, NULL); } if (*++s) sv_catpv(PL_e_script, s); else if (argv[1]) { sv_catpv(PL_e_script, argv[1]); argc--,argv++; } else croak("No code specified for -e"); sv_catpv(PL_e_script, "\n"); break; case 'I': /* -I handled both here and in moreswitches() */ forbid_setid("-I"); if (!*++s && (s=argv[1]) != Nullch) { argc--,argv++; } while (s && isSPACE(*s)) ++s; if (s && *s) { char *e, *p; for (e = s; *e && !isSPACE(*e); e++) ; p = savepvn(s, e-s); incpush(p, TRUE); sv_catpv(sv,"-I"); sv_catpv(sv,p); sv_catpv(sv," "); Safefree(p); } /* XXX else croak? */ break; case 'P': forbid_setid("-P"); PL_preprocess = TRUE; s++; goto reswitch; case 'S': forbid_setid("-S"); dosearch = TRUE; s++; goto reswitch; case 'V': if (!PL_preambleav) PL_preambleav = newAV(); av_push(PL_preambleav, newSVpv("use Config qw(myconfig config_vars)",0)); if (*++s != ':') { PL_Sv = newSVpv("print myconfig();",0); #ifdef VMS sv_catpv(PL_Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\","); #else sv_catpv(PL_Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\","); #endif #if defined(DEBUGGING) || defined(MULTIPLICITY) sv_catpv(PL_Sv,"\" Compile-time options:"); # ifdef DEBUGGING sv_catpv(PL_Sv," DEBUGGING"); # endif # ifdef MULTIPLICITY sv_catpv(PL_Sv," MULTIPLICITY"); # endif sv_catpv(PL_Sv,"\\n\","); #endif #if defined(LOCAL_PATCH_COUNT) if (LOCAL_PATCH_COUNT > 0) { int i; sv_catpv(PL_Sv,"\" Locally applied patches:\\n\","); for (i = 1; i <= LOCAL_PATCH_COUNT; i++) { if (PL_localpatches[i]) sv_catpvf(PL_Sv,"q\" \t%s\n\",",PL_localpatches[i]); } } #endif sv_catpvf(PL_Sv,"\" Built under %s\\n\"",OSNAME); #ifdef __DATE__ # ifdef __TIME__ sv_catpvf(PL_Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__); # else sv_catpvf(PL_Sv,",\" Compiled on %s\\n\"",__DATE__); # endif #endif sv_catpv(PL_Sv, "; \ $\"=\"\\n \"; \ @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \ print \" \\%ENV:\\n @env\\n\" if @env; \ print \" \\@INC:\\n @INC\\n\";"); } else { PL_Sv = newSVpv("config_vars(qw(",0); sv_catpv(PL_Sv, ++s); sv_catpv(PL_Sv, "))"); s += strlen(s); } av_push(PL_preambleav, PL_Sv); scriptname = BIT_BUCKET; /* don't look for script or read stdin */ goto reswitch; case 'x': PL_doextract = TRUE; s++; if (*s) PL_cddir = savepv(s); break; case 0: break; case '-': if (!*++s || isSPACE(*s)) { argc--,argv++; goto switch_end; } /* catch use of gnu style long options */ if (strEQ(s, "version")) { s = "v"; goto reswitch; } if (strEQ(s, "help")) { s = "h"; goto reswitch; } s--; /* FALL THROUGH */ default: croak("Unrecognized switch: -%s (-h will show valid options)",s); } } switch_end: if ( #ifndef SECURE_INTERNAL_GETENV !PL_tainting && #endif (s = PerlEnv_getenv("PERL5OPT"))) { while (isSPACE(*s)) s++; if (*s == '-' && *(s+1) == 'T') PL_tainting = TRUE; else { while (s && *s) { while (isSPACE(*s)) s++; if (*s == '-') { s++; if (isSPACE(*s)) continue; } if (!*s) break; if (!strchr("DIMUdmw", *s)) croak("Illegal switch in PERL5OPT: -%c", *s); s = moreswitches(s); } } } if (!scriptname) scriptname = argv[0]; if (PL_e_script) { argc++,argv--; scriptname = BIT_BUCKET; /* don't look for script or read stdin */ } else if (scriptname == Nullch) { #ifdef MSDOS if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) ) moreswitches("h"); #endif scriptname = "-"; } init_perllib(); open_script(scriptname,dosearch,sv,&fdscript); validate_suid(validarg, scriptname,fdscript); if (PL_doextract) find_beginning(); PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0); sv_upgrade((SV *)PL_compcv, SVt_PVCV); CvUNIQUE_on(PL_compcv); PL_comppad = newAV(); av_push(PL_comppad, Nullsv); PL_curpad = AvARRAY(PL_comppad); PL_comppad_name = newAV(); PL_comppad_name_fill = 0; PL_min_intro_pending = 0; PL_padix = 0; #ifdef USE_THREADS av_store(PL_comppad_name, 0, newSVpvn("@_", 2)); PL_curpad[0] = (SV*)newAV(); SvPADMY_on(PL_curpad[0]); /* XXX Needed? */ CvOWNER(PL_compcv) = 0; New(666, CvMUTEXP(PL_compcv), 1, perl_mutex); MUTEX_INIT(CvMUTEXP(PL_compcv)); #endif /* USE_THREADS */ comppadlist = newAV(); AvREAL_off(comppadlist); av_store(comppadlist, 0, (SV*)PL_comppad_name); av_store(comppadlist, 1, (SV*)PL_comppad); CvPADLIST(PL_compcv) = comppadlist; boot_core_UNIVERSAL(); if (xsinit) (*xsinit)(PERL_OBJECT_THIS); /* in case linked C routines want magical variables */ #if defined(VMS) || defined(WIN32) || defined(DJGPP) init_os_extras(); #endif init_predump_symbols(); /* init_postdump_symbols not currently designed to be called */ /* more than once (ENV isn't cleared first, for example) */ /* But running with -u leaves %ENV & @ARGV undefined! XXX */ if (!PL_do_undump) init_postdump_symbols(argc,argv,env); init_lexer(); /* now parse the script */ SETERRNO(0,SS$_NORMAL); PL_error_count = 0; if (yyparse() || PL_error_count) { if (PL_minus_c) croak("%s had compilation errors.\n", PL_origfilename); else { croak("Execution of %s aborted due to compilation errors.\n", PL_origfilename); } } PL_curcop->cop_line = 0; PL_curstash = PL_defstash; PL_preprocess = FALSE; if (PL_e_script) { SvREFCNT_dec(PL_e_script); PL_e_script = Nullsv; } /* now that script is parsed, we can modify record separator */ SvREFCNT_dec(PL_rs); PL_rs = SvREFCNT_inc(PL_nrs); sv_setsv(perl_get_sv("/", TRUE), PL_rs); if (PL_do_undump) my_unexec(); if (ckWARN(WARN_ONCE)) gv_check(PL_defstash); LEAVE; FREETMPS; #ifdef MYMALLOC if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2) dump_mstats("after compilation:"); #endif ENTER; PL_restartop = 0; return NULL; } int #ifdef PERL_OBJECT perl_run(void) #else perl_run(PerlInterpreter *sv_interp) #endif { dTHR; I32 oldscope; int ret; #ifndef PERL_OBJECT if (!(PL_curinterp = sv_interp)) return 255; #endif oldscope = PL_scopestack_ix; redo_body: CALLPROTECT(&ret, FUNC_NAME_TO_PTR(perl_run_body), oldscope); switch (ret) { case 1: cxstack_ix = -1; /* start context stack again */ goto redo_body; case 0: /* normal completion */ case 2: /* my_exit() */ while (PL_scopestack_ix > oldscope) LEAVE; FREETMPS; PL_curstash = PL_defstash; if (PL_endav) call_list(oldscope, PL_endav); #ifdef MYMALLOC if (PerlEnv_getenv("PERL_DEBUG_MSTATS")) dump_mstats("after execution: "); #endif return STATUS_NATIVE_EXPORT; case 3: if (PL_restartop) { POPSTACK_TO(PL_mainstack); goto redo_body; } PerlIO_printf(PerlIO_stderr(), "panic: restartop\n"); FREETMPS; return 1; } /* NOTREACHED */ return 0; } STATIC void * perl_run_body(va_list args) { dTHR; I32 oldscope = va_arg(args, I32); DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n", PL_sawampersand ? "Enabling" : "Omitting")); if (!PL_restartop) { DEBUG_x(dump_all()); DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n")); DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n", (unsigned long) thr)); if (PL_minus_c) { PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", PL_origfilename); my_exit(0); } if (PERLDB_SINGLE && PL_DBsingle) sv_setiv(PL_DBsingle, 1); if (PL_initav) call_list(oldscope, PL_initav); } /* do it */ if (PL_restartop) { PL_op = PL_restartop; PL_restartop = 0; CALLRUNOPS(); } else if (PL_main_start) { CvDEPTH(PL_main_cv) = 1; PL_op = PL_main_start; CALLRUNOPS(); } return NULL; } SV* perl_get_sv(const char *name, I32 create) { GV *gv; #ifdef USE_THREADS if (name[1] == '\0' && !isALPHA(name[0])) { PADOFFSET tmp = find_threadsv(name); if (tmp != NOT_IN_PAD) { dTHR; return THREADSV(tmp); } } #endif /* USE_THREADS */ gv = gv_fetchpv(name, create, SVt_PV); if (gv) return GvSV(gv); return Nullsv; } AV* perl_get_av(const char *name, I32 create) { GV* gv = gv_fetchpv(name, create, SVt_PVAV); if (create) return GvAVn(gv); if (gv) return GvAV(gv); return Nullav; } HV* perl_get_hv(const char *name, I32 create) { GV* gv = gv_fetchpv(name, create, SVt_PVHV); if (create) return GvHVn(gv); if (gv) return GvHV(gv); return Nullhv; } CV* perl_get_cv(const char *name, I32 create) { GV* gv = gv_fetchpv(name, create, SVt_PVCV); /* XXX unsafe for threads if eval_owner isn't held */ /* XXX this is probably not what they think they're getting. * It has the same effect as "sub name;", i.e. just a forward * declaration! */ if (create && !GvCVu(gv)) return newSUB(start_subparse(FALSE, 0), newSVOP(OP_CONST, 0, newSVpv(name,0)), Nullop, Nullop); if (gv) return GvCVu(gv); return Nullcv; } /* Be sure to refetch the stack pointer after calling these routines. */ I32 perl_call_argv(const char *sub_name, I32 flags, register char **argv) /* See G_* flags in cop.h */ /* null terminated arg list */ { dSP; PUSHMARK(SP); if (argv) { while (*argv) { XPUSHs(sv_2mortal(newSVpv(*argv,0))); argv++; } PUTBACK; } return perl_call_pv(sub_name, flags); } I32 perl_call_pv(const char *sub_name, I32 flags) /* name of the subroutine */ /* See G_* flags in cop.h */ { return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags); } I32 perl_call_method(const char *methname, I32 flags) /* name of the subroutine */ /* See G_* flags in cop.h */ { dSP; OP myop; if (!PL_op) PL_op = &myop; XPUSHs(sv_2mortal(newSVpv(methname,0))); PUTBACK; pp_method(ARGS); if(PL_op == &myop) PL_op = Nullop; return perl_call_sv(*PL_stack_sp--, flags); } /* May be called with any of a CV, a GV, or an SV containing the name. */ I32 perl_call_sv(SV *sv, I32 flags) /* See G_* flags in cop.h */ { dSP; LOGOP myop; /* fake syntax tree node */ I32 oldmark; I32 retval; I32 oldscope; bool oldcatch = CATCH_GET; int ret; OP* oldop = PL_op; if (flags & G_DISCARD) { ENTER; SAVETMPS; } Zero(&myop, 1, LOGOP); myop.op_next = Nullop; if (!(flags & G_NOARGS)) myop.op_flags |= OPf_STACKED; myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID : (flags & G_ARRAY) ? OPf_WANT_LIST : OPf_WANT_SCALAR); SAVEOP(); PL_op = (OP*)&myop; EXTEND(PL_stack_sp, 1); *++PL_stack_sp = sv; oldmark = TOPMARK; oldscope = PL_scopestack_ix; if (PERLDB_SUB && PL_curstash != PL_debstash /* Handle first BEGIN of -d. */ && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub))) /* Try harder, since this may have been a sighandler, thus * curstash may be meaningless. */ && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash) && !(flags & G_NODEBUG)) PL_op->op_private |= OPpENTERSUB_DB; if (!(flags & G_EVAL)) { CATCH_SET(TRUE); perl_call_xbody((OP*)&myop, FALSE); retval = PL_stack_sp - (PL_stack_base + oldmark); CATCH_SET(FALSE); } else { cLOGOP->op_other = PL_op; PL_markstack_ptr--; /* we're trying to emulate pp_entertry() here */ { register PERL_CONTEXT *cx; I32 gimme = GIMME_V; ENTER; SAVETMPS; push_return(PL_op->op_next); PUSHBLOCK(cx, CXt_EVAL, PL_stack_sp); PUSHEVAL(cx, 0, 0); PL_eval_root = PL_op; /* Only needed so that goto works right. */ PL_in_eval = 1; if (flags & G_KEEPERR) PL_in_eval |= 4; else sv_setpv(ERRSV,""); } PL_markstack_ptr++; redo_body: CALLPROTECT(&ret, FUNC_NAME_TO_PTR(perl_call_body), (OP*)&myop, FALSE); switch (ret) { case 0: retval = PL_stack_sp - (PL_stack_base + oldmark); if (!(flags & G_KEEPERR)) sv_setpv(ERRSV,""); break; case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ PL_curstash = PL_defstash; FREETMPS; if (PL_statusvalue) croak("Callback called exit"); my_exit_jump(); /* NOTREACHED */ case 3: if (PL_restartop) { PL_op = PL_restartop; PL_restartop = 0; goto redo_body; } PL_stack_sp = PL_stack_base + oldmark; if (flags & G_ARRAY) retval = 0; else { retval = 1; *++PL_stack_sp = &PL_sv_undef; } break; } if (PL_scopestack_ix > oldscope) { SV **newsp; PMOP *newpm; I32 gimme; register PERL_CONTEXT *cx; I32 optype; POPBLOCK(cx,newpm); POPEVAL(cx); pop_return(); PL_curpm = newpm; LEAVE; } } if (flags & G_DISCARD) { PL_stack_sp = PL_stack_base + oldmark; retval = 0; FREETMPS; LEAVE; } PL_op = oldop; return retval; } STATIC void * perl_call_body(va_list args) { OP *myop = va_arg(args, OP*); int is_eval = va_arg(args, int); perl_call_xbody(myop, is_eval); return NULL; } STATIC void perl_call_xbody(OP *myop, int is_eval) { dTHR; if (PL_op == myop) { if (is_eval) PL_op = pp_entereval(ARGS); else PL_op = pp_entersub(ARGS); } if (PL_op) CALLRUNOPS(); } /* Eval a string. The G_EVAL flag is always assumed. */ I32 perl_eval_sv(SV *sv, I32 flags) /* See G_* flags in cop.h */ { dSP; UNOP myop; /* fake syntax tree node */ I32 oldmark = SP - PL_stack_base; I32 retval; I32 oldscope; int ret; OP* oldop = PL_op; if (flags & G_DISCARD) { ENTER; SAVETMPS; } SAVEOP(); PL_op = (OP*)&myop; Zero(PL_op, 1, UNOP); EXTEND(PL_stack_sp, 1); *++PL_stack_sp = sv; oldscope = PL_scopestack_ix; if (!(flags & G_NOARGS)) myop.op_flags = OPf_STACKED; myop.op_next = Nullop; myop.op_type = OP_ENTEREVAL; myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID : (flags & G_ARRAY) ? OPf_WANT_LIST : OPf_WANT_SCALAR); if (flags & G_KEEPERR) myop.op_flags |= OPf_SPECIAL; redo_body: CALLPROTECT(&ret, FUNC_NAME_TO_PTR(perl_call_body), (OP*)&myop, TRUE); switch (ret) { case 0: retval = PL_stack_sp - (PL_stack_base + oldmark); if (!(flags & G_KEEPERR)) sv_setpv(ERRSV,""); break; case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ PL_curstash = PL_defstash; FREETMPS; if (PL_statusvalue) croak("Callback called exit"); my_exit_jump(); /* NOTREACHED */ case 3: if (PL_restartop) { PL_op = PL_restartop; PL_restartop = 0; goto redo_body; } PL_stack_sp = PL_stack_base + oldmark; if (flags & G_ARRAY) retval = 0; else { retval = 1; *++PL_stack_sp = &PL_sv_undef; } break; } if (flags & G_DISCARD) { PL_stack_sp = PL_stack_base + oldmark; retval = 0; FREETMPS; LEAVE; } PL_op = oldop; return retval; } SV* perl_eval_pv(const char *p, I32 croak_on_error) { dSP; SV* sv = newSVpv(p, 0); PUSHMARK(SP); perl_eval_sv(sv, G_SCALAR); SvREFCNT_dec(sv); SPAGAIN; sv = POPs; PUTBACK; if (croak_on_error && SvTRUE(ERRSV)) { STRLEN n_a; croak(SvPVx(ERRSV, n_a)); } return sv; } /* Require a module. */ void perl_require_pv(const char *pv) { SV* sv; dSP; PUSHSTACKi(PERLSI_REQUIRE); PUTBACK; sv = sv_newmortal(); sv_setpv(sv, "require '"); sv_catpv(sv, pv); sv_catpv(sv, "'"); perl_eval_sv(sv, G_DISCARD); SPAGAIN; POPSTACK; } void magicname(char *sym, char *name, I32 namlen) { register GV *gv; if (gv = gv_fetchpv(sym,TRUE, SVt_PV)) sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen); } STATIC void usage(char *name) /* XXX move this out into a module ? */ { /* This message really ought to be max 23 lines. * Removed -h because the user already knows that opton. Others? */ static char *usage_msg[] = { "-0[octal] specify record separator (\\0, if no argument)", "-a autosplit mode with -n or -p (splits $_ into @F)", "-c check syntax only (runs BEGIN and END blocks)", "-d[:debugger] run scripts under debugger", "-D[number/list] set debugging flags (argument is a bit mask or flags)", "-e 'command' one line of script. Several -e's allowed. Omit [programfile].", "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.", "-i[extension] edit <> files in place (make backup if extension supplied)", "-Idirectory specify @INC/#include directory (may be used more than once)", "-l[octal] enable line ending processing, specifies line terminator", "-[mM][-]module.. executes `use/no module...' before executing your script.", "-n assume 'while (<>) { ... }' loop around your script", "-p assume loop like -n but print line also like sed", "-P run script through C preprocessor before compilation", "-s enable some switch parsing for switches after script name", "-S look for the script using PATH environment variable", "-T turn on tainting checks", "-u dump core after parsing script", "-U allow unsafe operations", "-v print version number, patchlevel plus VERY IMPORTANT perl info", "-V[:variable] print perl configuration information", "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.", "-x[directory] strip off text before #!perl line and perhaps cd to directory", "\n", NULL }; char **p = usage_msg; printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name); while (*p) printf("\n %s", *p++); } /* This routine handles any switches that can be given during run */ char * moreswitches(char *s) { I32 numlen; U32 rschar; switch (*s) { case '0': { dTHR; rschar = scan_oct(s, 4, &numlen); SvREFCNT_dec(PL_nrs); if (rschar & ~((U8)~0)) PL_nrs = &PL_sv_undef; else if (!rschar && numlen >= 2) PL_nrs = newSVpvn("", 0); else { char ch = rschar; PL_nrs = newSVpvn(&ch, 1); } return s + numlen; } case 'F': PL_minus_F = TRUE; PL_splitstr = savepv(s + 1); s += strlen(s); return s; case 'a': PL_minus_a = TRUE; s++; return s; case 'c': PL_minus_c = TRUE; s++; return s; case 'd': forbid_setid("-d"); s++; if (*s == ':' || *s == '=') { my_setenv("PERL5DB", form("use Devel::%s;", ++s)); s += strlen(s); } if (!PL_perldb) { PL_perldb = PERLDB_ALL; init_debugger(); } return s; case 'D': #ifdef DEBUGGING forbid_setid("-D"); if (isALPHA(s[1])) { static char debopts[] = "psltocPmfrxuLHXDS"; char *d; for (s++; *s && (d = strchr(debopts,*s)); s++) PL_debug |= 1 << (d - debopts); } else { PL_debug = atoi(s+1); for (s++; isDIGIT(*s); s++) ; } PL_debug |= 0x80000000; #else warn("Recompile perl with -DDEBUGGING to use -D switch\n"); for (s++; isALNUM(*s); s++) ; #endif /*SUPPRESS 530*/ return s; case 'h': usage(PL_origargv[0]); PerlProc_exit(0); case 'i': if (PL_inplace) Safefree(PL_inplace); PL_inplace = savepv(s+1); /*SUPPRESS 530*/ for (s = PL_inplace; *s && !isSPACE(*s); s++) ; if (*s) { *s++ = '\0'; if (*s == '-') /* Additional switches on #! line. */ s++; } return s; case 'I': /* -I handled both here and in parse_perl() */ forbid_setid("-I"); ++s; while (*s && isSPACE(*s)) ++s; if (*s) { char *e, *p; for (e = s; *e && !isSPACE(*e); e++) ; p = savepvn(s, e-s); incpush(p, TRUE); Safefree(p); s = e; } else croak("No space allowed after -I"); return s; case 'l': PL_minus_l = TRUE; s++; if (PL_ors) Safefree(PL_ors); if (isDIGIT(*s)) { PL_ors = savepv("\n"); PL_orslen = 1; *PL_ors = scan_oct(s, 3 + (*s == '0'), &numlen); s += numlen; } else { dTHR; if (RsPARA(PL_nrs)) { PL_ors = "\n\n"; PL_orslen = 2; } else PL_ors = SvPV(PL_nrs, PL_orslen); PL_ors = savepvn(PL_ors, PL_orslen); } return s; case 'M': forbid_setid("-M"); /* XXX ? */ /* FALL THROUGH */ case 'm': forbid_setid("-m"); /* XXX ? */ if (*++s) { char *start; SV *sv; char *use = "use "; /* -M-foo == 'no foo' */ if (*s == '-') { use = "no "; ++s; } sv = newSVpv(use,0); start = s; /* We allow -M'Module qw(Foo Bar)' */ while(isALNUM(*s) || *s==':') ++s; if (*s != '=') { sv_catpv(sv, start); if (*(start-1) == 'm') { if (*s != '\0') croak("Can't use '%c' after -mname", *s); sv_catpv( sv, " ()"); } } else { sv_catpvn(sv, start, s-start); sv_catpv(sv, " split(/,/,q{"); sv_catpv(sv, ++s); sv_catpv(sv, "})"); } s += strlen(s); if (PL_preambleav == NULL) PL_preambleav = newAV(); av_push(PL_preambleav, sv); } else croak("No space allowed after -%c", *(s-1)); return s; case 'n': PL_minus_n = TRUE; s++; return s; case 'p': PL_minus_p = TRUE; s++; return s; case 's': forbid_setid("-s"); PL_doswitches = TRUE; s++; return s; case 'T': if (!PL_tainting) croak("Too late for \"-T\" option"); s++; return s; case 'u': PL_do_undump = TRUE; s++; return s; case 'U': PL_unsafe = TRUE; s++; return s; case 'v': #if defined(PERL_SUBVERSION) && PERL_SUBVERSION > 0 printf("\nThis is perl, version %d.%03d_%02d built for %s", PERL_REVISION, PERL_VERSION, PERL_SUBVERSION, ARCHNAME); #else printf("\nThis is perl, version %s built for %s", PL_patchlevel, ARCHNAME); #endif #if defined(LOCAL_PATCH_COUNT) if (LOCAL_PATCH_COUNT > 0) printf("\n(with %d registered patch%s, see perl -V for more detail)", LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : ""); #endif printf("\n\nCopyright 1987-1999, Larry Wall\n"); #ifdef MSDOS printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n"); #endif #ifdef DJGPP printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"); printf("djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n"); #endif #ifdef OS2 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n" "Version 5 port Copyright (c) 1994-1999, Andreas Kaiser, Ilya Zakharevich\n"); #endif #ifdef atarist printf("atariST series port, ++jrb bammi@cadence.com\n"); #endif #ifdef __BEOS__ printf("BeOS port Copyright Tom Spindler, 1997-1999\n"); #endif #ifdef MPE printf("MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-1999\n"); #endif #ifdef OEMVS printf("MVS (OS390) port by Mortice Kern Systems, 1997-1999\n"); #endif #ifdef __VOS__ printf("Stratus VOS port by Paul_Green@stratus.com, 1997-1999\n"); #endif #ifdef __OPEN_VM printf("VM/ESA port by Neale Ferguson, 1998-1999\n"); #endif #ifdef POSIX_BC printf("BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n"); #endif #ifdef __MINT__ printf("MiNT port by Guido Flohr, 1997-1999\n"); #endif #ifdef BINARY_BUILD_NOTICE BINARY_BUILD_NOTICE; #endif printf("\n\ Perl may be copied only under the terms of either the Artistic License or the\n\ GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n\ Complete documentation for Perl, including FAQ lists, should be found on\n\ this system using `man perl' or `perldoc perl'. If you have access to the\n\ Internet, point your browser at http://www.perl.com/, the Perl Home Page.\n\n"); PerlProc_exit(0); case 'w': if (! (PL_dowarn & G_WARN_ALL_MASK)) PL_dowarn |= G_WARN_ON; s++; return s; case 'W': PL_dowarn = G_WARN_ALL_ON|G_WARN_ON; PL_compiling.cop_warnings = WARN_ALL ; s++; return s; case 'X': PL_dowarn = G_WARN_ALL_OFF; PL_compiling.cop_warnings = WARN_NONE ; s++; return s; case '*': case ' ': if (s[1] == '-') /* Additional switches on #! line. */ return s+2; break; case '-': case 0: #if defined(WIN32) || !defined(PERL_STRICT_CR) case '\r': #endif case '\n': case '\t': break; #ifdef ALTERNATE_SHEBANG case 'S': /* OS/2 needs -S on "extproc" line. */ break; #endif case 'P': if (PL_preprocess) return s+1; /* FALL THROUGH */ default: croak("Can't emulate -%.1s on #! line",s); } return Nullch; } /* compliments of Tom Christiansen */ /* unexec() can be found in the Gnu emacs distribution */ /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */ void my_unexec(void) { #ifdef UNEXEC SV* prog; SV* file; int status = 1; extern int etext; prog = newSVpv(BIN_EXP, 0); sv_catpv(prog, "/perl"); file = newSVpv(PL_origfilename, 0); sv_catpv(file, ".perldump"); unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0); /* unexec prints msg to stderr in case of failure */ PerlProc_exit(status); #else # ifdef VMS # include lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */ # else ABORT(); /* for use with undump */ # endif #endif } /* initialize curinterp */ STATIC void init_interp(void) { #ifdef PERL_OBJECT /* XXX kludge */ #define I_REINIT \ STMT_START { \ PL_chopset = " \n-"; \ PL_copline = NOLINE; \ PL_curcop = &PL_compiling;\ PL_curcopdb = NULL; \ PL_dbargs = 0; \ PL_dlmax = 128; \ PL_dumpindent = 4; \ PL_laststatval = -1; \ PL_laststype = OP_STAT; \ PL_maxscream = -1; \ PL_maxsysfd = MAXSYSFD; \ PL_statname = Nullsv; \ PL_tmps_floor = -1; \ PL_tmps_ix = -1; \ PL_op_mask = NULL; \ PL_dlmax = 128; \ PL_laststatval = -1; \ PL_laststype = OP_STAT; \ PL_mess_sv = Nullsv; \ PL_splitstr = " "; \ PL_generation = 100; \ PL_exitlist = NULL; \ PL_exitlistlen = 0; \ PL_regindent = 0; \ PL_in_clean_objs = FALSE; \ PL_in_clean_all = FALSE; \ PL_profiledata = NULL; \ PL_rsfp = Nullfp; \ PL_rsfp_filters = Nullav; \ PL_dirty = FALSE; \ } STMT_END I_REINIT; #else # ifdef MULTIPLICITY # define PERLVAR(var,type) # define PERLVARI(var,type,init) PL_curinterp->var = init; # define PERLVARIC(var,type,init) PL_curinterp->var = init; # include "intrpvar.h" # ifndef USE_THREADS # include "thrdvar.h" # endif # undef PERLVAR # undef PERLVARI # undef PERLVARIC # else # define PERLVAR(var,type) # define PERLVARI(var,type,init) PL_##var = init; # define PERLVARIC(var,type,init) PL_##var = init; # include "intrpvar.h" # ifndef USE_THREADS # include "thrdvar.h" # endif # undef PERLVAR # undef PERLVARI # undef PERLVARIC # endif #endif } STATIC void init_main_stash(void) { dTHR; GV *gv; /* Note that strtab is a rather special HV. Assumptions are made about not iterating on it, and not adding tie magic to it. It is properly deallocated in perl_destruct() */ PL_strtab = newHV(); #ifdef USE_THREADS MUTEX_INIT(&PL_strtab_mutex); #endif HvSHAREKEYS_off(PL_strtab); /* mandatory */ hv_ksplit(PL_strtab, 512); PL_curstash = PL_defstash = newHV(); PL_curstname = newSVpvn("main",4); gv = gv_fetchpv("main::",TRUE, SVt_PVHV); SvREFCNT_dec(GvHV(gv)); GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash); SvREADONLY_on(gv); HvNAME(PL_defstash) = savepv("main"); PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV))); GvMULTI_on(PL_incgv); PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */ GvMULTI_on(PL_hintgv); PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV); PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV)); GvMULTI_on(PL_errgv); PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */ GvMULTI_on(PL_replgv); (void)form("%240s",""); /* Preallocate temp - for immediate signals. */ sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */ sv_setpvn(ERRSV, "", 0); PL_curstash = PL_defstash; PL_compiling.cop_stash = PL_defstash; PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV)); PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV)); /* We must init $/ before switches are processed. */ sv_setpvn(perl_get_sv("/", TRUE), "\n", 1); } STATIC void open_script(char *scriptname, bool dosearch, SV *sv, int *fdscript) { dTHR; register char *s; *fdscript = -1; if (PL_e_script) { PL_origfilename = savepv("-e"); } else { /* if find_script() returns, it returns a malloc()-ed value */ PL_origfilename = scriptname = find_script(scriptname, dosearch, NULL, 1); if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) { char *s = scriptname + 8; *fdscript = atoi(s); while (isDIGIT(*s)) s++; if (*s) { scriptname = savepv(s + 1); Safefree(PL_origfilename); PL_origfilename = scriptname; } } } PL_curcop->cop_filegv = gv_fetchfile(PL_origfilename); if (strEQ(PL_origfilename,"-")) scriptname = ""; if (*fdscript >= 0) { PL_rsfp = PerlIO_fdopen(*fdscript,PERL_SCRIPT_MODE); #if defined(HAS_FCNTL) && defined(F_SETFD) if (PL_rsfp) fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */ #endif } else if (PL_preprocess) { char *cpp_cfg = CPPSTDIN; SV *cpp = newSVpvn("",0); SV *cmd = NEWSV(0,0); if (strEQ(cpp_cfg, "cppstdin")) sv_catpvf(cpp, "%s/", BIN_EXP); sv_catpv(cpp, cpp_cfg); sv_catpv(sv,"-I"); sv_catpv(sv,PRIVLIB_EXP); #ifdef MSDOS sv_setpvf(cmd, "\ sed %s -e \"/^[^#]/b\" \ -e \"/^#[ ]*include[ ]/b\" \ -e \"/^#[ ]*define[ ]/b\" \ -e \"/^#[ ]*if[ ]/b\" \ -e \"/^#[ ]*ifdef[ ]/b\" \ -e \"/^#[ ]*ifndef[ ]/b\" \ -e \"/^#[ ]*else/b\" \ -e \"/^#[ ]*elif[ ]/b\" \ -e \"/^#[ ]*undef[ ]/b\" \ -e \"/^#[ ]*endif/b\" \ -e \"s/^#.*//\" \ %s | %_ -C %_ %s", (PL_doextract ? "-e \"1,/^#/d\n\"" : ""), #else # ifdef __OPEN_VM sv_setpvf(cmd, "\ %s %s -e '/^[^#]/b' \ -e '/^#[ ]*include[ ]/b' \ -e '/^#[ ]*define[ ]/b' \ -e '/^#[ ]*if[ ]/b' \ -e '/^#[ ]*ifdef[ ]/b' \ -e '/^#[ ]*ifndef[ ]/b' \ -e '/^#[ ]*else/b' \ -e '/^#[ ]*elif[ ]/b' \ -e '/^#[ ]*undef[ ]/b' \ -e '/^#[ ]*endif/b' \ -e 's/^[ ]*#.*//' \ %s | %_ %_ %s", # else sv_setpvf(cmd, "\ %s %s -e '/^[^#]/b' \ -e '/^#[ ]*include[ ]/b' \ -e '/^#[ ]*define[ ]/b' \ -e '/^#[ ]*if[ ]/b' \ -e '/^#[ ]*ifdef[ ]/b' \ -e '/^#[ ]*ifndef[ ]/b' \ -e '/^#[ ]*else/b' \ -e '/^#[ ]*elif[ ]/b' \ -e '/^#[ ]*undef[ ]/b' \ -e '/^#[ ]*endif/b' \ -e 's/^[ ]*#.*//' \ %s | %_ -C %_ %s", # endif #ifdef LOC_SED LOC_SED, #else "sed", #endif (PL_doextract ? "-e '1,/^#/d\n'" : ""), #endif scriptname, cpp, sv, CPPMINUS); PL_doextract = FALSE; #ifdef IAMSUID /* actually, this is caught earlier */ if (PL_euid != PL_uid && !PL_euid) { /* if running suidperl */ #ifdef HAS_SETEUID (void)seteuid(PL_uid); /* musn't stay setuid root */ #else #ifdef HAS_SETREUID (void)setreuid((Uid_t)-1, PL_uid); #else #ifdef HAS_SETRESUID (void)setresuid((Uid_t)-1, PL_uid, (Uid_t)-1); #else PerlProc_setuid(PL_uid); #endif #endif #endif if (PerlProc_geteuid() != PL_uid) croak("Can't do seteuid!\n"); } #endif /* IAMSUID */ PL_rsfp = PerlProc_popen(SvPVX(cmd), "r"); SvREFCNT_dec(cmd); SvREFCNT_dec(cpp); } else if (!*scriptname) { forbid_setid("program input from stdin"); PL_rsfp = PerlIO_stdin(); } else { PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE); #if defined(HAS_FCNTL) && defined(F_SETFD) if (PL_rsfp) fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); /* ensure close-on-exec */ #endif } if (!PL_rsfp) { #ifdef DOSUID #ifndef IAMSUID /* in case script is not readable before setuid */ if (PL_euid && PerlLIO_stat(SvPVX(GvSV(PL_curcop->cop_filegv)),&PL_statbuf) >= 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) { /* try again */ PerlProc_execv(form("%s/sperl%s", BIN_EXP, PL_patchlevel), PL_origargv); croak("Can't do setuid\n"); } #endif #endif croak("Can't open perl script \"%s\": %s\n", SvPVX(GvSV(PL_curcop->cop_filegv)), Strerror(errno)); } } /* Mention * I_SYSSTATVFS HAS_FSTATVFS * I_SYSMOUNT * I_STATFS HAS_FSTATFS * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT * here so that metaconfig picks them up. */ #ifdef IAMSUID static int fd_on_nosuid_fs(int fd) { int on_nosuid = 0; int check_okay = 0; /* * Preferred order: fstatvfs(), fstatfs(), getmntent(). * fstatvfs() is UNIX98. * fstatfs() is BSD. * getmntent() is O(number-of-mounted-filesystems) and can hang. */ # ifdef HAS_FSTATVFS struct statvfs stfs; check_okay = fstatvfs(fd, &stfs) == 0; on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID); # else # if defined(HAS_FSTATFS) && defined(HAS_STRUCT_STATFS_FLAGS) struct statfs stfs; check_okay = fstatfs(fd, &stfs) == 0; # undef PERL_MOUNT_NOSUID # if !defined(PERL_MOUNT_NOSUID) && defined(MNT_NOSUID) # define PERL_MOUNT_NOSUID MNT_NOSUID # endif # if !defined(PERL_MOUNT_NOSUID) && defined(MS_NOSUID) # define PERL_MOUNT_NOSUID MS_NOSUID # endif # if !defined(PERL_MOUNT_NOSUID) && defined(M_NOSUID) # define PERL_MOUNT_NOSUID M_NOSUID # endif # ifdef PERL_MOUNT_NOSUID on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID); # endif # else # if defined(HAS_GETMNTENT) && defined(HAS_HASMNTOPT) && defined(MNTOPT_NOSUID) FILE *mtab = fopen("/etc/mtab", "r"); struct mntent *entry; struct stat stb, fsb; if (mtab && (fstat(fd, &stb) == 0)) { while (entry = getmntent(mtab)) { if (stat(entry->mnt_dir, &fsb) == 0 && fsb.st_dev == stb.st_dev) { /* found the filesystem */ check_okay = 1; if (hasmntopt(entry, MNTOPT_NOSUID)) on_nosuid = 1; break; } /* A single fs may well fail its stat(). */ } } if (mtab) fclose(mtab); # endif /* mntent */ # endif /* statfs */ # endif /* statvfs */ if (!check_okay) croak("Can't check filesystem of script \"%s\"", PL_origfilename); return on_nosuid; } #endif /* IAMSUID */ STATIC void validate_suid(char *validarg, char *scriptname, int fdscript) { int which; /* do we need to emulate setuid on scripts? */ /* This code is for those BSD systems that have setuid #! scripts disabled * in the kernel because of a security problem. Merely defining DOSUID * in perl will not fix that problem, but if you have disabled setuid * scripts in the kernel, this will attempt to emulate setuid and setgid * on scripts that have those now-otherwise-useless bits set. The setuid * root version must be called suidperl or sperlN.NNN. If regular perl * discovers that it has opened a setuid script, it calls suidperl with * the same argv that it had. If suidperl finds that the script it has * just opened is NOT setuid root, it sets the effective uid back to the * uid. We don't just make perl setuid root because that loses the * effective uid we had before invoking perl, if it was different from the * uid. * * DOSUID must be defined in both perl and suidperl, and IAMSUID must * be defined in suidperl only. suidperl must be setuid root. The * Configure script will set this up for you if you want it. */ #ifdef DOSUID dTHR; char *s, *s2; if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */ croak("Can't stat script \"%s\"",PL_origfilename); if (fdscript < 0 && PL_statbuf.st_mode & (S_ISUID|S_ISGID)) { I32 len; STRLEN n_a; #ifdef IAMSUID #ifndef HAS_SETREUID /* On this access check to make sure the directories are readable, * there is actually a small window that the user could use to make * filename point to an accessible directory. So there is a faint * chance that someone could execute a setuid script down in a * non-accessible directory. I don't know what to do about that. * But I don't think it's too important. The manual lies when * it says access() is useful in setuid programs. */ if (PerlLIO_access(SvPVX(GvSV(PL_curcop->cop_filegv)),1)) /*double check*/ croak("Permission denied"); #else /* If we can swap euid and uid, then we can determine access rights * with a simple stat of the file, and then compare device and * inode to make sure we did stat() on the same file we opened. * Then we just have to make sure he or she can execute it. */ { struct stat tmpstatbuf; if ( #ifdef HAS_SETREUID setreuid(PL_euid,PL_uid) < 0 #else # if HAS_SETRESUID setresuid(PL_euid,PL_uid,(Uid_t)-1) < 0 # endif #endif || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid) croak("Can't swap uid and euid"); /* really paranoid */ if (PerlLIO_stat(SvPVX(GvSV(PL_curcop->cop_filegv)),&tmpstatbuf) < 0) croak("Permission denied"); /* testing full pathname here */ #if defined(IAMSUID) && !defined(NO_NOSUID_CHECK) if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) croak("Permission denied"); #endif if (tmpstatbuf.st_dev != PL_statbuf.st_dev || tmpstatbuf.st_ino != PL_statbuf.st_ino) { (void)PerlIO_close(PL_rsfp); if (PL_rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */ PerlIO_printf(PL_rsfp, "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\ (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n", (long)PL_uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino, (long)PL_statbuf.st_dev, (long)PL_statbuf.st_ino, SvPVX(GvSV(PL_curcop->cop_filegv)), (long)PL_statbuf.st_uid, (long)PL_statbuf.st_gid); (void)PerlProc_pclose(PL_rsfp); } croak("Permission denied\n"); } if ( #ifdef HAS_SETREUID setreuid(PL_uid,PL_euid) < 0 #else # if defined(HAS_SETRESUID) setresuid(PL_uid,PL_euid,(Uid_t)-1) < 0 # endif #endif || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid) croak("Can't reswap uid and euid"); if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */ croak("Permission denied\n"); } #endif /* HAS_SETREUID */ #endif /* IAMSUID */ if (!S_ISREG(PL_statbuf.st_mode)) croak("Permission denied"); if (PL_statbuf.st_mode & S_IWOTH) croak("Setuid/gid script is writable by world"); PL_doswitches = FALSE; /* -s is insecure in suid */ PL_curcop->cop_line++; if (sv_gets(PL_linestr, PL_rsfp, 0) == Nullch || strnNE(SvPV(PL_linestr,n_a),"#!",2) ) /* required even on Sys V */ croak("No #! line"); s = SvPV(PL_linestr,n_a)+2; if (*s == ' ') s++; while (!isSPACE(*s)) s++; for (s2 = s; (s2 > SvPV(PL_linestr,n_a)+2 && (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ; if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */ croak("Not a perl script"); while (*s == ' ' || *s == '\t') s++; /* * #! arg must be what we saw above. They can invoke it by * mentioning suidperl explicitly, but they may not add any strange * arguments beyond what #! says if they do invoke suidperl that way. */ len = strlen(validarg); if (strEQ(validarg," PHOOEY ") || strnNE(s,validarg,len) || !isSPACE(s[len])) croak("Args must match #! line"); #ifndef IAMSUID if (PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) && PL_euid == PL_statbuf.st_uid) if (!PL_do_undump) croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\ FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n"); #endif /* IAMSUID */ if (PL_euid) { /* oops, we're not the setuid root perl */ (void)PerlIO_close(PL_rsfp); #ifndef IAMSUID /* try again */ PerlProc_execv(form("%s/sperl%s", BIN_EXP, PL_patchlevel), PL_origargv); #endif croak("Can't do setuid\n"); } if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) { #ifdef HAS_SETEGID (void)setegid(PL_statbuf.st_gid); #else #ifdef HAS_SETREGID (void)setregid((Gid_t)-1,PL_statbuf.st_gid); #else #ifdef HAS_SETRESGID (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1); #else PerlProc_setgid(PL_statbuf.st_gid); #endif #endif #endif if (PerlProc_getegid() != PL_statbuf.st_gid) croak("Can't do setegid!\n"); } if (PL_statbuf.st_mode & S_ISUID) { if (PL_statbuf.st_uid != PL_euid) #ifdef HAS_SETEUID (void)seteuid(PL_statbuf.st_uid); /* all that for this */ #else #ifdef HAS_SETREUID (void)setreuid((Uid_t)-1,PL_statbuf.st_uid); #else #ifdef HAS_SETRESUID (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1); #else PerlProc_setuid(PL_statbuf.st_uid); #endif #endif #endif if (PerlProc_geteuid() != PL_statbuf.st_uid) croak("Can't do seteuid!\n"); } else if (PL_uid) { /* oops, mustn't run as root */ #ifdef HAS_SETEUID (void)seteuid((Uid_t)PL_uid); #else #ifdef HAS_SETREUID (void)setreuid((Uid_t)-1,(Uid_t)PL_uid); #else #ifdef HAS_SETRESUID (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1); #else PerlProc_setuid((Uid_t)PL_uid); #endif #endif #endif if (PerlProc_geteuid() != PL_uid) croak("Can't do seteuid!\n"); } init_ids(); if (!cando(S_IXUSR,TRUE,&PL_statbuf)) croak("Permission denied\n"); /* they can't do this */ } #ifdef IAMSUID else if (PL_preprocess) croak("-P not allowed for setuid/setgid script\n"); else if (fdscript >= 0) croak("fd script not allowed in suidperl\n"); else croak("Script is not setuid/setgid in suidperl\n"); /* We absolutely must clear out any saved ids here, so we */ /* exec the real perl, substituting fd script for scriptname. */ /* (We pass script name as "subdir" of fd, which perl will grok.) */ PerlIO_rewind(PL_rsfp); PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */ for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; if (!PL_origargv[which]) croak("Permission denied"); PL_origargv[which] = savepv(form("/dev/fd/%d/%s", PerlIO_fileno(PL_rsfp), PL_origargv[which])); #if defined(HAS_FCNTL) && defined(F_SETFD) fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */ #endif PerlProc_execv(form("%s/perl%s", BIN_EXP, PL_patchlevel), PL_origargv);/* try again */ croak("Can't do setuid\n"); #endif /* IAMSUID */ #else /* !DOSUID */ if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */ #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW dTHR; PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */ if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID) || (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID) ) if (!PL_do_undump) croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\ FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n"); #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */ /* not set-id, must be wrapped */ } #endif /* DOSUID */ } STATIC void find_beginning(void) { register char *s, *s2; /* skip forward in input to the real script? */ forbid_setid("-x"); while (PL_doextract) { if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) croak("No Perl script found in input\n"); if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) { PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */ PL_doextract = FALSE; while (*s && !(isSPACE (*s) || *s == '#')) s++; s2 = s; while (*s == ' ' || *s == '\t') s++; if (*s++ == '-') { while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--; if (strnEQ(s2-4,"perl",4)) /*SUPPRESS 530*/ while (s = moreswitches(s)) ; } if (PL_cddir && PerlDir_chdir(PL_cddir) < 0) croak("Can't chdir to %s",PL_cddir); } } } STATIC void init_ids(void) { PL_uid = (int)PerlProc_getuid(); PL_euid = (int)PerlProc_geteuid(); PL_gid = (int)PerlProc_getgid(); PL_egid = (int)PerlProc_getegid(); #ifdef VMS PL_uid |= PL_gid << 16; PL_euid |= PL_egid << 16; #endif PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid)); } STATIC void forbid_setid(char *s) { if (PL_euid != PL_uid) croak("No %s allowed while running setuid", s); if (PL_egid != PL_gid) croak("No %s allowed while running setgid", s); } STATIC void init_debugger(void) { dTHR; PL_curstash = PL_debstash; PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV)))); AvREAL_off(PL_dbargs); PL_DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV); PL_DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV); PL_DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV)); PL_DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV))); sv_setiv(PL_DBsingle, 0); PL_DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV))); sv_setiv(PL_DBtrace, 0); PL_DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV))); sv_setiv(PL_DBsignal, 0); PL_curstash = PL_defstash; } #ifndef STRESS_REALLOC #define REASONABLE(size) (size) #else #define REASONABLE(size) (1) /* unreasonable */ #endif void init_stacks(ARGSproto) { /* start with 128-item stack and 8K cxstack */ PL_curstackinfo = new_stackinfo(REASONABLE(128), REASONABLE(8192/sizeof(PERL_CONTEXT) - 1)); PL_curstackinfo->si_type = PERLSI_MAIN; PL_curstack = PL_curstackinfo->si_stack; PL_mainstack = PL_curstack; /* remember in case we switch stacks */ PL_stack_base = AvARRAY(PL_curstack); PL_stack_sp = PL_stack_base; PL_stack_max = PL_stack_base + AvMAX(PL_curstack); New(50,PL_tmps_stack,REASONABLE(128),SV*); PL_tmps_floor = -1; PL_tmps_ix = -1; PL_tmps_max = REASONABLE(128); New(54,PL_markstack,REASONABLE(32),I32); PL_markstack_ptr = PL_markstack; PL_markstack_max = PL_markstack + REASONABLE(32); SET_MARKBASE; New(54,PL_scopestack,REASONABLE(32),I32); PL_scopestack_ix = 0; PL_scopestack_max = REASONABLE(32); New(54,PL_savestack,REASONABLE(128),ANY); PL_savestack_ix = 0; PL_savestack_max = REASONABLE(128); New(54,PL_retstack,REASONABLE(16),OP*); PL_retstack_ix = 0; PL_retstack_max = REASONABLE(16); } #undef REASONABLE STATIC void nuke_stacks(void) { dTHR; while (PL_curstackinfo->si_next) PL_curstackinfo = PL_curstackinfo->si_next; while (PL_curstackinfo) { PERL_SI *p = PL_curstackinfo->si_prev; /* curstackinfo->si_stack got nuked by sv_free_arenas() */ Safefree(PL_curstackinfo->si_cxstack); Safefree(PL_curstackinfo); PL_curstackinfo = p; } Safefree(PL_tmps_stack); Safefree(PL_markstack); Safefree(PL_scopestack); Safefree(PL_savestack); Safefree(PL_retstack); DEBUG( { Safefree(PL_debname); Safefree(PL_debdelim); } ) } #ifndef PERL_OBJECT static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */ #endif STATIC void init_lexer(void) { #ifdef PERL_OBJECT PerlIO *tmpfp; #endif tmpfp = PL_rsfp; PL_rsfp = Nullfp; lex_start(PL_linestr); PL_rsfp = tmpfp; PL_subname = newSVpvn("main",4); } STATIC void init_predump_symbols(void) { dTHR; GV *tmpgv; GV *othergv; sv_setpvn(perl_get_sv("\"", TRUE), " ", 1); PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO); GvMULTI_on(PL_stdingv); IoIFP(GvIOp(PL_stdingv)) = PerlIO_stdin(); tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV); GvMULTI_on(tmpgv); GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(PL_stdingv)); tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO); GvMULTI_on(tmpgv); IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout(); setdefout(tmpgv); tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV); GvMULTI_on(tmpgv); GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(PL_defoutgv)); othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO); GvMULTI_on(othergv); IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr(); tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV); GvMULTI_on(tmpgv); GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv)); PL_statname = NEWSV(66,0); /* last filename we did stat on */ if (!PL_osname) PL_osname = savepv(OSNAME); } STATIC void init_postdump_symbols(register int argc, register char **argv, register char **env) { dTHR; char *s; SV *sv; GV* tmpgv; argc--,argv++; /* skip name of script */ if (PL_doswitches) { for (; argc > 0 && **argv == '-'; argc--,argv++) { if (!argv[0][1]) break; if (argv[0][1] == '-') { argc--,argv++; break; } if (s = strchr(argv[0], '=')) { *s++ = '\0'; sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s); } else sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1); } } PL_toptarget = NEWSV(0,0); sv_upgrade(PL_toptarget, SVt_PVFM); sv_setpvn(PL_toptarget, "", 0); PL_bodytarget = NEWSV(0,0); sv_upgrade(PL_bodytarget, SVt_PVFM); sv_setpvn(PL_bodytarget, "", 0); PL_formtarget = PL_bodytarget; TAINT; if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) { sv_setpv(GvSV(tmpgv),PL_origfilename); magicname("0", "0", 1); } if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV)) sv_setpv(GvSV(tmpgv),PL_origargv[0]); if (PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) { GvMULTI_on(PL_argvgv); (void)gv_AVadd(PL_argvgv); av_clear(GvAVn(PL_argvgv)); for (; argc > 0; argc--,argv++) { av_push(GvAVn(PL_argvgv),newSVpv(argv[0],0)); } } if (PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) { HV *hv; GvMULTI_on(PL_envgv); hv = GvHVn(PL_envgv); hv_magic(hv, PL_envgv, 'E'); #ifndef VMS /* VMS doesn't have environ array */ /* Note that if the supplied env parameter is actually a copy of the global environ then it may now point to free'd memory if the environment has been modified since. To avoid this problem we treat env==NULL as meaning 'use the default' */ if (!env) env = environ; if (env != environ) environ[0] = Nullch; for (; *env; env++) { if (!(s = strchr(*env,'='))) continue; *s++ = '\0'; #if defined(MSDOS) (void)strupr(*env); #endif sv = newSVpv(s--,0); (void)hv_store(hv, *env, s - *env, sv, 0); *s = '='; #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV) /* Sins of the RTL. See note in my_setenv(). */ (void)PerlEnv_putenv(savepv(*env)); #endif } #endif #ifdef DYNAMIC_ENV_FETCH HvNAME(hv) = savepv(ENV_HV_NAME); #endif } TAINT_NOT; if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV)) sv_setiv(GvSV(tmpgv), (IV)getpid()); } STATIC void init_perllib(void) { char *s; if (!PL_tainting) { #ifndef VMS s = PerlEnv_getenv("PERL5LIB"); if (s) incpush(s, TRUE); else incpush(PerlEnv_getenv("PERLLIB"), FALSE); #else /* VMS */ /* Treat PERL5?LIB as a possible search list logical name -- the * "natural" VMS idiom for a Unix path string. We allow each * element to be a set of |-separated directories for compatibility. */ char buf[256]; int idx = 0; if (my_trnlnm("PERL5LIB",buf,0)) do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx)); else while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE); #endif /* VMS */ } /* Use the ~-expanded versions of APPLLIB (undocumented), ARCHLIB PRIVLIB SITEARCH and SITELIB */ #ifdef APPLLIB_EXP incpush(APPLLIB_EXP, TRUE); #endif #ifdef ARCHLIB_EXP incpush(ARCHLIB_EXP, FALSE); #endif #ifndef PRIVLIB_EXP #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl" #endif #if defined(WIN32) incpush(PRIVLIB_EXP, TRUE); #else incpush(PRIVLIB_EXP, FALSE); #endif #ifdef SITEARCH_EXP incpush(SITEARCH_EXP, FALSE); #endif #ifdef SITELIB_EXP #if defined(WIN32) incpush(SITELIB_EXP, TRUE); #else incpush(SITELIB_EXP, FALSE); #endif #endif if (!PL_tainting) incpush(".", FALSE); } #if defined(DOSISH) # define PERLLIB_SEP ';' #else # if defined(VMS) # define PERLLIB_SEP '|' # else # define PERLLIB_SEP ':' # endif #endif #ifndef PERLLIB_MANGLE # define PERLLIB_MANGLE(s,n) (s) #endif STATIC void incpush(char *p, int addsubdirs) { SV *subdir = Nullsv; if (!p) return; if (addsubdirs) { subdir = sv_newmortal(); if (!PL_archpat_auto) { STRLEN len = (sizeof(ARCHNAME) + strlen(PL_patchlevel) + sizeof("//auto")); New(55, PL_archpat_auto, len, char); sprintf(PL_archpat_auto, "/%s/%s/auto", ARCHNAME, PL_patchlevel); #ifdef VMS for (len = sizeof(ARCHNAME) + 2; PL_archpat_auto[len] != '\0' && PL_archpat_auto[len] != '/'; len++) if (PL_archpat_auto[len] == '.') PL_archpat_auto[len] = '_'; #endif } } /* Break at all separators */ while (p && *p) { SV *libdir = NEWSV(55,0); char *s; /* skip any consecutive separators */ while ( *p == PERLLIB_SEP ) { /* Uncomment the next line for PATH semantics */ /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */ p++; } if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) { sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)), (STRLEN)(s - p)); p = s + 1; } else { sv_setpv(libdir, PERLLIB_MANGLE(p, 0)); p = Nullch; /* break out */ } /* * BEFORE pushing libdir onto @INC we may first push version- and * archname-specific sub-directories. */ if (addsubdirs) { struct stat tmpstatbuf; #ifdef VMS char *unix; STRLEN len; if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) { len = strlen(unix); while (unix[len-1] == '/') len--; /* Cosmetic */ sv_usepvn(libdir,unix,len); } else PerlIO_printf(PerlIO_stderr(), "Failed to unixify @INC element \"%s\"\n", SvPV(libdir,len)); #endif /* .../archname/version if -d .../archname/version/auto */ sv_setsv(subdir, libdir); sv_catpv(subdir, PL_archpat_auto); if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode)) av_push(GvAVn(PL_incgv), newSVpvn(SvPVX(subdir), SvCUR(subdir) - sizeof "auto")); /* .../archname if -d .../archname/auto */ sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME), strlen(PL_patchlevel) + 1, "", 0); if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode)) av_push(GvAVn(PL_incgv), newSVpvn(SvPVX(subdir), SvCUR(subdir) - sizeof "auto")); } /* finally push this lib directory on the end of @INC */ av_push(GvAVn(PL_incgv), libdir); } } #ifdef USE_THREADS STATIC struct perl_thread * init_main_thread() { struct perl_thread *thr; XPV *xpv; Newz(53, thr, 1, struct perl_thread); PL_curcop = &PL_compiling; thr->cvcache = newHV(); thr->threadsv = newAV(); /* thr->threadsvp is set when find_threadsv is called */ thr->specific = newAV(); thr->errhv = newHV(); thr->flags = THRf_R_JOINABLE; MUTEX_INIT(&thr->mutex); /* Handcraft thrsv similarly to mess_sv */ New(53, PL_thrsv, 1, SV); Newz(53, xpv, 1, XPV); SvFLAGS(PL_thrsv) = SVt_PV; SvANY(PL_thrsv) = (void*)xpv; SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */ SvPVX(PL_thrsv) = (char*)thr; SvCUR_set(PL_thrsv, sizeof(thr)); SvLEN_set(PL_thrsv, sizeof(thr)); *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */ thr->oursv = PL_thrsv; PL_chopset = " \n-"; PL_dumpindent = 4; MUTEX_LOCK(&PL_threads_mutex); PL_nthreads++; thr->tid = 0; thr->next = thr; thr->prev = thr; MUTEX_UNLOCK(&PL_threads_mutex); #ifdef HAVE_THREAD_INTERN init_thread_intern(thr); #endif #ifdef SET_THREAD_SELF SET_THREAD_SELF(thr); #else thr->self = pthread_self(); #endif /* SET_THREAD_SELF */ SET_THR(thr); /* * These must come after the SET_THR because sv_setpvn does * SvTAINT and the taint fields require dTHR. */ PL_toptarget = NEWSV(0,0); sv_upgrade(PL_toptarget, SVt_PVFM); sv_setpvn(PL_toptarget, "", 0); PL_bodytarget = NEWSV(0,0); sv_upgrade(PL_bodytarget, SVt_PVFM); sv_setpvn(PL_bodytarget, "", 0); PL_formtarget = PL_bodytarget; thr->errsv = newSVpvn("", 0); (void) find_threadsv("@"); /* Ensure $@ is initialised early */ PL_maxscream = -1; PL_regcompp = FUNC_NAME_TO_PTR(pregcomp); PL_regexecp = FUNC_NAME_TO_PTR(regexec_flags); PL_regindent = 0; PL_reginterp_cnt = 0; return thr; } #endif /* USE_THREADS */ void call_list(I32 oldscope, AV *paramList) { dTHR; SV *atsv = ERRSV; line_t oldline = PL_curcop->cop_line; CV *cv; STRLEN len; int ret; while (AvFILL(paramList) >= 0) { cv = (CV*)av_shift(paramList); SAVEFREESV(cv); CALLPROTECT(&ret, FUNC_NAME_TO_PTR(call_list_body), cv); switch (ret) { case 0: (void)SvPV(atsv, len); if (len) { PL_curcop = &PL_compiling; PL_curcop->cop_line = oldline; if (paramList == PL_beginav) sv_catpv(atsv, "BEGIN failed--compilation aborted"); else sv_catpv(atsv, "END failed--cleanup aborted"); while (PL_scopestack_ix > oldscope) LEAVE; croak("%s", SvPVX(atsv)); } break; case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ while (PL_scopestack_ix > oldscope) LEAVE; FREETMPS; PL_curstash = PL_defstash; if (PL_endav) call_list(oldscope, PL_endav); PL_curcop = &PL_compiling; PL_curcop->cop_line = oldline; if (PL_statusvalue) { if (paramList == PL_beginav) croak("BEGIN failed--compilation aborted"); else croak("END failed--cleanup aborted"); } my_exit_jump(); /* NOTREACHED */ case 3: if (PL_restartop) { PL_curcop = &PL_compiling; PL_curcop->cop_line = oldline; JMPENV_JUMP(3); } PerlIO_printf(PerlIO_stderr(), "panic: restartop\n"); FREETMPS; break; } } } STATIC void * call_list_body(va_list args) { dTHR; CV *cv = va_arg(args, CV*); PUSHMARK(PL_stack_sp); perl_call_sv((SV*)cv, G_EVAL|G_DISCARD); return NULL; } void my_exit(U32 status) { dTHR; DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n", thr, (unsigned long) status)); switch (status) { case 0: STATUS_ALL_SUCCESS; break; case 1: STATUS_ALL_FAILURE; break; default: STATUS_NATIVE_SET(status); break; } my_exit_jump(); } void my_failure_exit(void) { #ifdef VMS if (vaxc$errno & 1) { if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */ STATUS_NATIVE_SET(44); } else { if (!vaxc$errno && errno) /* unlikely */ STATUS_NATIVE_SET(44); else STATUS_NATIVE_SET(vaxc$errno); } #else int exitstatus; if (errno & 255) STATUS_POSIX_SET(errno); else { exitstatus = STATUS_POSIX >> 8; if (exitstatus & 255) STATUS_POSIX_SET(exitstatus); else STATUS_POSIX_SET(255); } #endif my_exit_jump(); } STATIC void my_exit_jump(void) { dTHR; register PERL_CONTEXT *cx; I32 gimme; SV **newsp; if (PL_e_script) { SvREFCNT_dec(PL_e_script); PL_e_script = Nullsv; } POPSTACK_TO(PL_mainstack); if (cxstack_ix >= 0) { if (cxstack_ix > 0) dounwind(0); POPBLOCK(cx,PL_curpm); LEAVE; } JMPENV_JUMP(2); } #ifdef PERL_OBJECT #define NO_XSLOCKS #endif /* PERL_OBJECT */ #include "XSUB.h" static I32 #ifdef PERL_OBJECT read_e_script(CPerlObj *pPerl, int idx, SV *buf_sv, int maxlen) #else read_e_script(int idx, SV *buf_sv, int maxlen) #endif { char *p, *nl; p = SvPVX(PL_e_script); nl = strchr(p, '\n'); nl = (nl) ? nl+1 : SvEND(PL_e_script); if (nl-p == 0) { filter_del(read_e_script); return 0; } sv_catpvn(buf_sv, p, nl-p); sv_chop(PL_e_script, nl); return 1; }