/* perl.c * * Copyright (c) 1987-1996 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" #include "patchlevel.h" /* XXX If this causes problems, set i_unistd=undef in the hint file. */ #ifdef I_UNISTD #include #endif dEXTCONST char rcsid[] = "perl.c\nPatch level: ###\n"; #ifdef IAMSUID #ifndef DOSUID #define DOSUID #endif #endif #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW #ifdef DOSUID #undef DOSUID #endif #endif #define I_REINIT \ STMT_START { \ chopset = " \n-"; \ copline = NOLINE; \ curcop = &compiling; \ curcopdb = NULL; \ cxstack_ix = -1; \ cxstack_max = 128; \ dbargs = 0; \ dlmax = 128; \ laststatval = -1; \ laststype = OP_STAT; \ maxscream = -1; \ maxsysfd = MAXSYSFD; \ statname = Nullsv; \ tmps_floor = -1; \ tmps_ix = -1; \ op_mask = NULL; \ dlmax = 128; \ laststatval = -1; \ laststype = OP_STAT; \ } STMT_END static void find_beginning _((void)); static void forbid_setid _((char *)); static void incpush _((char *, int)); static void init_ids _((void)); static void init_debugger _((void)); static void init_lexer _((void)); static void init_main_stash _((void)); static void init_perllib _((void)); static void init_postdump_symbols _((int, char **, char **)); static void init_predump_symbols _((void)); static void init_stacks _((void)); static void my_exit_jump _((void)) __attribute__((noreturn)); static void nuke_stacks _((void)); static void open_script _((char *, bool, SV *)); static void usage _((char *)); static void validate_suid _((char *, char*)); static int fdscript = -1; PerlInterpreter * perl_alloc() { PerlInterpreter *sv_interp; curinterp = 0; New(53, sv_interp, 1, PerlInterpreter); return sv_interp; } void perl_construct( sv_interp ) register PerlInterpreter *sv_interp; { if (!(curinterp = sv_interp)) return; #ifdef MULTIPLICITY Zero(sv_interp, 1, PerlInterpreter); #endif /* Init the real globals? */ if (!linestr) { linestr = NEWSV(65,80); sv_upgrade(linestr,SVt_PVIV); if (!SvREADONLY(&sv_undef)) { SvREADONLY_on(&sv_undef); sv_setpv(&sv_no,No); SvNV(&sv_no); SvREADONLY_on(&sv_no); sv_setpv(&sv_yes,Yes); SvNV(&sv_yes); SvREADONLY_on(&sv_yes); } nrs = newSVpv("\n", 1); rs = SvREFCNT_inc(nrs); 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 } #ifdef MULTIPLICITY I_REINIT; perl_destruct_level = 1; #else if(perl_destruct_level > 0) I_REINIT; #endif init_ids(); STATUS_ALL_SUCCESS; SET_NUMERIC_STANDARD(); #if defined(SUBVERSION) && SUBVERSION > 0 sprintf(patchlevel, "%7.5f", (double) 5 + ((double) PATCHLEVEL / (double) 1000) + ((double) SUBVERSION / (double) 100000)); #else sprintf(patchlevel, "%5.3f", (double) 5 + ((double) PATCHLEVEL / (double) 1000)); #endif #if defined(LOCAL_PATCH_COUNT) localpatches = local_patches; /* For possible -v */ #endif PerlIO_init(); /* Hook to IO system */ fdpid = newAV(); /* for remembering popen pids by fd */ init_stacks(); ENTER; } void perl_destruct(sv_interp) register PerlInterpreter *sv_interp; { int destruct_level; /* 0=none, 1=full, 2=full with checks */ I32 last_sv_count; HV *hv; if (!(curinterp = sv_interp)) return; destruct_level = perl_destruct_level; #ifdef DEBUGGING { char *s; if (s = getenv("PERL_DESTRUCT_LEVEL")) { int i = atoi(s); if (destruct_level < i) destruct_level = i; } } #endif /* unhook hooks which will soon be, or use, destroyed data */ SvREFCNT_dec(warnhook); warnhook = Nullsv; SvREFCNT_dec(diehook); diehook = Nullsv; SvREFCNT_dec(parsehook); parsehook = Nullsv; LEAVE; FREETMPS; /* We must account for everything. */ /* Destroy the main CV and syntax tree */ if (main_root) { curpad = AvARRAY(comppad); op_free(main_root); main_root = Nullop; } main_start = Nullop; SvREFCNT_dec(main_cv); main_cv = Nullcv; if (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. */ dirty = TRUE; sv_clean_objs(); } if (destruct_level == 0){ DEBUG_P(debprofdump()); /* The exit() function will do everything that needs doing. */ return; } /* loosen bonds of global variables */ if(rsfp) { (void)PerlIO_close(rsfp); rsfp = Nullfp; } /* Filters for program text */ SvREFCNT_dec(rsfp_filters); rsfp_filters = Nullav; /* switches */ preprocess = FALSE; minus_n = FALSE; minus_p = FALSE; minus_l = FALSE; minus_a = FALSE; minus_F = FALSE; doswitches = FALSE; dowarn = FALSE; doextract = FALSE; sawampersand = FALSE; /* must save all match strings */ sawstudy = FALSE; /* do fbm_instr on all strings */ sawvec = FALSE; unsafe = FALSE; Safefree(inplace); inplace = Nullch; Safefree(e_tmpname); e_tmpname = Nullch; if (e_fp) { PerlIO_close(e_fp); e_fp = Nullfp; } /* magical thingies */ Safefree(ofs); /* $, */ ofs = Nullch; Safefree(ors); /* $\ */ ors = Nullch; SvREFCNT_dec(nrs); /* $\ helper */ nrs = Nullsv; multiline = 0; /* $* */ SvREFCNT_dec(statname); statname = Nullsv; statgv = Nullgv; /* defgv, aka *_ should be taken care of elsewhere */ #if 0 /* just about all regexp stuff, seems to be ok */ /* shortcuts to regexp stuff */ leftgv = Nullgv; ampergv = Nullgv; SAVEFREEOP(curpm); SAVEFREEOP(oldlastpm); /* for saving regexp context during debugger */ regprecomp = NULL; /* uncompiled string. */ regparse = NULL; /* Input-scan pointer. */ regxend = NULL; /* End of input for compile */ regnpar = 0; /* () count. */ regcode = NULL; /* Code-emit pointer; ®dummy = don't. */ regsize = 0; /* Code size. */ regnaughty = 0; /* How bad is this pattern? */ regsawback = 0; /* Did we see \1, ...? */ reginput = NULL; /* String-input pointer. */ regbol = NULL; /* Beginning of input, for ^ check. */ regeol = NULL; /* End of input, for $ check. */ regstartp = (char **)NULL; /* Pointer to startp array. */ regendp = (char **)NULL; /* Ditto for endp. */ reglastparen = 0; /* Similarly for lastparen. */ regtill = NULL; /* How far we are required to go. */ regflags = 0; /* are we folding, multilining? */ regprev = (char)NULL; /* char before regbol, \n if none */ #endif /* if 0 */ /* clean up after study() */ SvREFCNT_dec(lastscream); lastscream = Nullsv; Safefree(screamfirst); screamfirst = 0; Safefree(screamnext); screamnext = 0; /* startup and shutdown function lists */ SvREFCNT_dec(beginav); SvREFCNT_dec(endav); beginav = Nullav; endav = Nullav; /* temp stack during pp_sort() */ SvREFCNT_dec(sortstack); sortstack = Nullav; /* shortcuts just get cleared */ envgv = Nullgv; siggv = Nullgv; incgv = Nullgv; errgv = Nullgv; argvgv = Nullgv; argvoutgv = Nullgv; stdingv = Nullgv; last_in_gv = Nullgv; /* reset so print() ends up where we expect */ setdefout(Nullgv); /* Prepare to destruct main symbol table. */ hv = defstash; defstash = 0; SvREFCNT_dec(hv); FREETMPS; if (destruct_level >= 2) { if (scopestack_ix != 0) warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n", (long)scopestack_ix); if (savestack_ix != 0) warn("Unbalanced saves: %ld more saves than restores\n", (long)savestack_ix); if (tmps_floor != -1) warn("Unbalanced tmps: %ld more allocs than frees\n", (long)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(strtab) |= SVTYPEMASK; /* don't clean out strtab now */ while (sv_count != 0 && sv_count != last_sv_count) { last_sv_count = sv_count; sv_clean_all(); } SvFLAGS(strtab) &= ~SVTYPEMASK; SvFLAGS(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(strtab); array = HvARRAY(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(strtab); if (sv_count != 0) warn("Scalars leaked: %ld\n", (long)sv_count); sv_free_arenas(); /* No SVs have survived, need to clean out */ linestr = NULL; pidstatus = Nullhv; if (origfilename) Safefree(origfilename); nuke_stacks(); hints = 0; /* Reset hints. Should hints be per-interpreter ? */ DEBUG_P(debprofdump()); } void perl_free(sv_interp) PerlInterpreter *sv_interp; { if (!(curinterp = sv_interp)) return; Safefree(sv_interp); } #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) char *getenv _((char *)); /* Usually in */ #endif int perl_parse(sv_interp, xsinit, argc, argv, env) PerlInterpreter *sv_interp; void (*xsinit)_((void)); int argc; char **argv; char **env; { register SV *sv; register char *s; char *scriptname = NULL; VOL bool dosearch = FALSE; char *validarg = ""; AV* comppadlist; #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 if (!(curinterp = sv_interp)) return 255; #if defined(NeXT) && defined(__DYNAMIC__) _dyld_lookup_and_bind ("__environ", (unsigned long *) &environ_pointer, NULL); #endif /* environ */ origargv = argv; origargc = argc; #ifndef VMS /* VMS doesn't have environ array */ origenviron = environ; #endif e_tmpname = Nullch; if (do_undump) { /* Come here if running an undumped a.out. */ origfilename = savepv(argv[0]); do_undump = FALSE; cxstack_ix = -1; /* start label stack again */ init_ids(); init_postdump_symbols(argc,argv,env); return 0; } if (main_root) { curpad = AvARRAY(comppad); op_free(main_root); main_root = Nullop; } main_start = Nullop; SvREFCNT_dec(main_cv); main_cv = Nullcv; time(&basetime); switch (Sigsetjmp(top_env,1)) { case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ curstash = defstash; if (endav) calllist(endav); return STATUS_NATIVE_EXPORT; case 3: PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); return 1; } sv_setpvn(linestr,"",0); sv = newSVpv("",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) { 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': if (s = moreswitches(s)) goto reswitch; break; case 'T': tainting = TRUE; s++; goto reswitch; case 'e': if (euid != uid || egid != gid) croak("No -e allowed in setuid scripts"); if (!e_fp) { e_tmpname = savepv(TMPPATH); (void)mktemp(e_tmpname); if (!*e_tmpname) croak("Can't mktemp()"); e_fp = PerlIO_open(e_tmpname,"w"); if (!e_fp) croak("Cannot open temporary file"); } if (*++s) PerlIO_puts(e_fp,s); else if (argv[1]) { PerlIO_puts(e_fp,argv[1]); argc--,argv++; } else croak("No code specified for -e"); (void)PerlIO_putc(e_fp,'\n'); break; case 'I': forbid_setid("-I"); sv_catpv(sv,"-"); sv_catpv(sv,s); sv_catpv(sv," "); if (*++s) { incpush(s, TRUE); } else if (argv[1]) { incpush(argv[1], TRUE); sv_catpv(sv,argv[1]); argc--,argv++; sv_catpv(sv," "); } break; case 'P': forbid_setid("-P"); preprocess = TRUE; s++; goto reswitch; case 'S': forbid_setid("-S"); dosearch = TRUE; s++; goto reswitch; case 'V': if (!preambleav) preambleav = newAV(); av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0)); if (*++s != ':') { Sv = newSVpv("print myconfig();",0); #ifdef VMS sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\","); #else sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\","); #endif #if defined(DEBUGGING) || defined(NOEMBED) || defined(MULTIPLICITY) strcpy(buf,"\" Compile-time options:"); # ifdef DEBUGGING strcat(buf," DEBUGGING"); # endif # ifdef NOEMBED strcat(buf," NOEMBED"); # endif # ifdef MULTIPLICITY strcat(buf," MULTIPLICITY"); # endif strcat(buf,"\\n\","); sv_catpv(Sv,buf); #endif #if defined(LOCAL_PATCH_COUNT) if (LOCAL_PATCH_COUNT > 0) { int i; sv_catpv(Sv,"print \" Locally applied patches:\\n\","); for (i = 1; i <= LOCAL_PATCH_COUNT; i++) { if (localpatches[i]) { sprintf(buf,"\" \\t%s\\n\",",localpatches[i]); sv_catpv(Sv,buf); } } } #endif sprintf(buf,"\" Built under %s\\n\",",OSNAME); sv_catpv(Sv,buf); #ifdef __DATE__ # ifdef __TIME__ sprintf(buf,"\" Compiled at %s %s\\n\"",__DATE__,__TIME__); # else sprintf(buf,"\" Compiled on %s\\n\"",__DATE__); # endif sv_catpv(Sv,buf); #endif sv_catpv(Sv,"; $\"=\"\\n \"; print \" \\@INC:\\n @INC\\n\""); } else { Sv = newSVpv("config_vars(qw(",0); sv_catpv(Sv, ++s); sv_catpv(Sv, "))"); s += strlen(s); } av_push(preambleav, Sv); scriptname = BIT_BUCKET; /* don't look for script or read stdin */ goto reswitch; case 'x': doextract = TRUE; s++; if (*s) cddir = savepv(s); break; case '-': argc--,argv++; goto switch_end; case 0: break; default: croak("Unrecognized switch: -%s",s); } } switch_end: if (!scriptname) scriptname = argv[0]; if (e_fp) { if (PerlIO_flush(e_fp) || PerlIO_error(e_fp) || PerlIO_close(e_fp)) croak("Can't write to temp file for -e: %s", Strerror(errno)); e_fp = Nullfp; argc++,argv--; scriptname = e_tmpname; } else if (scriptname == Nullch) { #ifdef MSDOS if ( isatty(PerlIO_fileno(PerlIO_stdin())) ) moreswitches("h"); #endif scriptname = "-"; } init_perllib(); open_script(scriptname,dosearch,sv); validate_suid(validarg, scriptname); if (doextract) find_beginning(); main_cv = compcv = (CV*)NEWSV(1104,0); sv_upgrade((SV *)compcv, SVt_PVCV); CvUNIQUE_on(compcv); comppad = newAV(); av_push(comppad, Nullsv); curpad = AvARRAY(comppad); comppad_name = newAV(); comppad_name_fill = 0; min_intro_pending = 0; padix = 0; comppadlist = newAV(); AvREAL_off(comppadlist); av_store(comppadlist, 0, (SV*)comppad_name); av_store(comppadlist, 1, (SV*)comppad); CvPADLIST(compcv) = comppadlist; boot_core_UNIVERSAL(); if (xsinit) (*xsinit)(); /* in case linked C routines want magical variables */ #ifdef VMS init_os_extras(); #endif init_predump_symbols(); if (!do_undump) init_postdump_symbols(argc,argv,env); init_lexer(); /* now parse the script */ error_count = 0; if (yyparse() || error_count) { if (minus_c) croak("%s had compilation errors.\n", origfilename); else { croak("Execution of %s aborted due to compilation errors.\n", origfilename); } } curcop->cop_line = 0; curstash = defstash; preprocess = FALSE; if (e_tmpname) { (void)UNLINK(e_tmpname); Safefree(e_tmpname); e_tmpname = Nullch; } /* now that script is parsed, we can modify record separator */ SvREFCNT_dec(rs); rs = SvREFCNT_inc(nrs); sv_setsv(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), rs); if (do_undump) my_unexec(); if (dowarn) gv_check(defstash); LEAVE; FREETMPS; #ifdef DEBUGGING_MSTATS if ((s=getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2) dump_mstats("after compilation:"); #endif ENTER; restartop = 0; return 0; } int perl_run(sv_interp) PerlInterpreter *sv_interp; { if (!(curinterp = sv_interp)) return 255; switch (Sigsetjmp(top_env,1)) { case 1: cxstack_ix = -1; /* start context stack again */ break; case 2: /* my_exit() was called */ curstash = defstash; if (endav) calllist(endav); FREETMPS; #ifdef DEBUGGING_MSTATS if (getenv("PERL_DEBUG_MSTATS")) dump_mstats("after execution: "); #endif return STATUS_NATIVE_EXPORT; case 3: if (!restartop) { PerlIO_printf(PerlIO_stderr(), "panic: restartop\n"); FREETMPS; return 1; } if (curstack != mainstack) { dSP; SWITCHSTACK(curstack, mainstack); } break; } DEBUG_r(PerlIO_printf(PerlIO_stderr(), "%s $` $& $' support.\n", sawampersand ? "Enabling" : "Omitting")); if (!restartop) { DEBUG_x(dump_all()); DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n")); if (minus_c) { PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename); my_exit(0); } if (perldb && DBsingle) sv_setiv(DBsingle, 1); } /* do it */ if (restartop) { op = restartop; restartop = 0; runops(); } else if (main_start) { CvDEPTH(main_cv) = 1; op = main_start; runops(); } my_exit(0); return 0; } SV* perl_get_sv(name, create) char* name; I32 create; { GV* gv = gv_fetchpv(name, create, SVt_PV); if (gv) return GvSV(gv); return Nullsv; } AV* perl_get_av(name, create) 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(name, create) 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(name, create) char* name; I32 create; { GV* gv = gv_fetchpv(name, create, SVt_PVCV); 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(subname, flags, argv) char *subname; I32 flags; /* See G_* flags in cop.h */ register char **argv; /* null terminated arg list */ { dSP; PUSHMARK(sp); if (argv) { while (*argv) { XPUSHs(sv_2mortal(newSVpv(*argv,0))); argv++; } PUTBACK; } return perl_call_pv(subname, flags); } I32 perl_call_pv(subname, flags) char *subname; /* name of the subroutine */ I32 flags; /* See G_* flags in cop.h */ { return perl_call_sv((SV*)perl_get_cv(subname, TRUE), flags); } I32 perl_call_method(methname, flags) char *methname; /* name of the subroutine */ I32 flags; /* See G_* flags in cop.h */ { dSP; OP myop; if (!op) op = &myop; XPUSHs(sv_2mortal(newSVpv(methname,0))); PUTBACK; pp_method(); return perl_call_sv(*stack_sp--, flags); } /* May be called with any of a CV, a GV, or an SV containing the name. */ I32 perl_call_sv(sv, flags) SV* sv; I32 flags; /* See G_* flags in cop.h */ { LOGOP myop; /* fake syntax tree node */ SV** sp = stack_sp; I32 oldmark; I32 retval; Sigjmp_buf oldtop; I32 oldscope; static CV *DBcv; if (flags & G_DISCARD) { ENTER; SAVETMPS; } Zero(&myop, 1, LOGOP); if (flags & G_NOARGS) { PUSHMARK(sp); } else myop.op_flags |= OPf_STACKED; myop.op_next = Nullop; myop.op_flags |= OPf_KNOW; if (flags & G_ARRAY) myop.op_flags |= OPf_LIST; SAVESPTR(op); op = (OP*)&myop; EXTEND(stack_sp, 1); *++stack_sp = sv; oldmark = TOPMARK; oldscope = scopestack_ix; if (perldb && curstash != debstash /* Handle first BEGIN of -d. */ && (DBcv || (DBcv = GvCV(DBsub))) /* Try harder, since this may have been a sighandler, thus * curstash may be meaningless. */ && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash)) op->op_private |= OPpENTERSUB_DB; if (flags & G_EVAL) { Copy(top_env, oldtop, 1, Sigjmp_buf); cLOGOP->op_other = op; markstack_ptr--; /* we're trying to emulate pp_entertry() here */ { register CONTEXT *cx; I32 gimme = GIMME; ENTER; SAVETMPS; push_return(op->op_next); PUSHBLOCK(cx, CXt_EVAL, stack_sp); PUSHEVAL(cx, 0, 0); eval_root = op; /* Only needed so that goto works right. */ in_eval = 1; if (flags & G_KEEPERR) in_eval |= 4; else sv_setpv(GvSV(errgv),""); } markstack_ptr++; restart: switch (Sigsetjmp(top_env,1)) { case 0: break; case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ curstash = defstash; FREETMPS; Copy(oldtop, top_env, 1, Sigjmp_buf); if (statusvalue) croak("Callback called exit"); my_exit_jump(); /* NOTREACHED */ case 3: if (restartop) { op = restartop; restartop = 0; goto restart; } stack_sp = stack_base + oldmark; if (flags & G_ARRAY) retval = 0; else { retval = 1; *++stack_sp = &sv_undef; } goto cleanup; } } if (op == (OP*)&myop) op = pp_entersub(); if (op) runops(); retval = stack_sp - (stack_base + oldmark); if ((flags & G_EVAL) && !(flags & G_KEEPERR)) sv_setpv(GvSV(errgv),""); cleanup: if (flags & G_EVAL) { if (scopestack_ix > oldscope) { SV **newsp; PMOP *newpm; I32 gimme; register CONTEXT *cx; I32 optype; POPBLOCK(cx,newpm); POPEVAL(cx); pop_return(); curpm = newpm; LEAVE; } Copy(oldtop, top_env, 1, Sigjmp_buf); } if (flags & G_DISCARD) { stack_sp = stack_base + oldmark; retval = 0; FREETMPS; LEAVE; } return retval; } /* Eval a string. The G_EVAL flag is always assumed. */ I32 perl_eval_sv(sv, flags) SV* sv; I32 flags; /* See G_* flags in cop.h */ { UNOP myop; /* fake syntax tree node */ SV** sp = stack_sp; I32 oldmark = sp - stack_base; I32 retval; Sigjmp_buf oldtop; I32 oldscope; if (flags & G_DISCARD) { ENTER; SAVETMPS; } SAVESPTR(op); op = (OP*)&myop; Zero(op, 1, UNOP); EXTEND(stack_sp, 1); *++stack_sp = sv; oldscope = scopestack_ix; if (!(flags & G_NOARGS)) myop.op_flags = OPf_STACKED; myop.op_next = Nullop; myop.op_type = OP_ENTEREVAL; myop.op_flags |= OPf_KNOW; if (flags & G_KEEPERR) myop.op_flags |= OPf_SPECIAL; if (flags & G_ARRAY) myop.op_flags |= OPf_LIST; Copy(top_env, oldtop, 1, Sigjmp_buf); restart: switch (Sigsetjmp(top_env,1)) { case 0: break; case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ curstash = defstash; FREETMPS; Copy(oldtop, top_env, 1, Sigjmp_buf); if (statusvalue) croak("Callback called exit"); my_exit_jump(); /* NOTREACHED */ case 3: if (restartop) { op = restartop; restartop = 0; goto restart; } stack_sp = stack_base + oldmark; if (flags & G_ARRAY) retval = 0; else { retval = 1; *++stack_sp = &sv_undef; } goto cleanup; } if (op == (OP*)&myop) op = pp_entereval(); if (op) runops(); retval = stack_sp - (stack_base + oldmark); if (!(flags & G_KEEPERR)) sv_setpv(GvSV(errgv),""); cleanup: Copy(oldtop, top_env, 1, Sigjmp_buf); if (flags & G_DISCARD) { stack_sp = stack_base + oldmark; retval = 0; FREETMPS; LEAVE; } return retval; } /* Require a module. */ void perl_require_pv(pv) char* pv; { SV* sv = sv_newmortal(); sv_setpv(sv, "require '"); sv_catpv(sv, pv); sv_catpv(sv, "'"); perl_eval_sv(sv, G_DISCARD); } void magicname(sym,name,namlen) 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(name) /* XXX move this out into a module ? */ char *name; { /* This message really ought to be max 23 lines. * Removed -h because the user already knows that opton. Others? */ printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name); printf("\n -0[octal] specify record separator (\\0, if no argument)"); printf("\n -a autosplit mode with -n or -p (splits $_ into @F)"); printf("\n -c check syntax only (runs BEGIN and END blocks)"); printf("\n -d[:debugger] run scripts under debugger"); printf("\n -D[number/list] set debugging flags (argument is a bit mask or flags)"); printf("\n -e 'command' one line of script. Several -e's allowed. Omit [programfile]."); printf("\n -F/pattern/ split() pattern for autosplit (-a). The //'s are optional."); printf("\n -i[extension] edit <> files in place (make backup if extension supplied)"); printf("\n -Idirectory specify @INC/#include directory (may be used more then once)"); printf("\n -l[octal] enable line ending processing, specifies line teminator"); printf("\n -[mM][-]module.. executes `use/no module...' before executing your script."); printf("\n -n assume 'while (<>) { ... }' loop arround your script"); printf("\n -p assume loop like -n but print line also like sed"); printf("\n -P run script through C preprocessor before compilation"); printf("\n -s enable some switch parsing for switches after script name"); printf("\n -S look for the script using PATH environment variable"); printf("\n -T turn on tainting checks"); printf("\n -u dump core after parsing script"); printf("\n -U allow unsafe operations"); printf("\n -v print version number and patchlevel of perl"); printf("\n -V[:variable] print perl configuration information"); printf("\n -w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT."); printf("\n -x[directory] strip off text before #!perl line and perhaps cd to directory\n"); } /* This routine handles any switches that can be given during run */ char * moreswitches(s) char *s; { I32 numlen; U32 rschar; switch (*s) { case '0': rschar = scan_oct(s, 4, &numlen); SvREFCNT_dec(nrs); if (rschar & ~((U8)~0)) nrs = &sv_undef; else if (!rschar && numlen >= 2) nrs = newSVpv("", 0); else { char ch = rschar; nrs = newSVpv(&ch, 1); } return s + numlen; case 'F': minus_F = TRUE; splitstr = savepv(s + 1); s += strlen(s); return s; case 'a': minus_a = TRUE; s++; return s; case 'c': minus_c = TRUE; s++; return s; case 'd': forbid_setid("-d"); s++; if (*s == ':' || *s == '=') { sprintf(buf, "use Devel::%s;", ++s); s += strlen(s); my_setenv("PERL5DB",buf); } if (!perldb) { perldb = TRUE; init_debugger(); } return s; case 'D': #ifdef DEBUGGING forbid_setid("-D"); if (isALPHA(s[1])) { static char debopts[] = "psltocPmfrxuLHXD"; char *d; for (s++; *s && (d = strchr(debopts,*s)); s++) debug |= 1 << (d - debopts); } else { debug = atoi(s+1); for (s++; isDIGIT(*s); s++) ; } 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(origargv[0]); exit(0); case 'i': if (inplace) Safefree(inplace); inplace = savepv(s+1); /*SUPPRESS 530*/ for (s = inplace; *s && !isSPACE(*s); s++) ; *s = '\0'; break; case 'I': forbid_setid("-I"); if (*++s) { char *e, *p; for (e = s; *e && !isSPACE(*e); e++) ; p = savepvn(s, e-s); incpush(p, TRUE); Safefree(p); if (*e) return e; } else croak("No space allowed after -I"); break; case 'l': minus_l = TRUE; s++; if (ors) Safefree(ors); if (isDIGIT(*s)) { ors = savepv("\n"); orslen = 1; *ors = scan_oct(s, 3 + (*s == '0'), &numlen); s += numlen; } else { if (RsPARA(nrs)) { ors = "\n\n"; orslen = 2; } else ors = SvPV(nrs, orslen); ors = savepvn(ors, orslen); } return s; case 'M': forbid_setid("-M"); /* XXX ? */ /* FALL THROUGH */ case 'm': forbid_setid("-m"); /* XXX ? */ if (*++s) { char *start; 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 (preambleav == NULL) preambleav = newAV(); av_push(preambleav, Sv); } else croak("No space allowed after -%c", *(s-1)); return s; case 'n': minus_n = TRUE; s++; return s; case 'p': minus_p = TRUE; s++; return s; case 's': forbid_setid("-s"); doswitches = TRUE; s++; return s; case 'T': if (!tainting) croak("Too late for \"-T\" option (try putting it first)"); s++; return s; case 'u': do_undump = TRUE; s++; return s; case 'U': unsafe = TRUE; s++; return s; case 'v': #if defined(SUBVERSION) && SUBVERSION > 0 printf("\nThis is perl, version 5.%03d_%02d", PATCHLEVEL, SUBVERSION); #else printf("\nThis is perl, version %s",patchlevel); #endif printf("\n\nCopyright 1987-1997, Larry Wall\n"); #ifdef MSDOS printf("\n\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n"); #endif #ifdef DJGPP printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"); #endif #ifdef OS2 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n" "Version 5 port Copyright (c) 1994-1996, Andreas Kaiser, Ilya Zakharevich\n"); #endif #ifdef atarist printf("atariST series port, ++jrb bammi@cadence.com\n"); #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"); exit(0); case 'w': dowarn = TRUE; s++; return s; case '*': case ' ': if (s[1] == '-') /* Additional switches on #! line. */ return s+2; break; case '-': case 0: case '\n': case '\t': break; #ifdef ALTERNATE_SHEBANG case 'S': /* OS/2 needs -S on "extproc" line. */ break; #endif case 'P': if (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 */ void my_unexec() { #ifdef UNEXEC int status; extern int etext; sprintf (buf, "%s.perldump", origfilename); sprintf (tokenbuf, "%s/perl", BIN); status = unexec(buf, tokenbuf, &etext, sbrk(0), 0); if (status) PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n", tokenbuf, buf); exit(status); #else # ifdef VMS # include lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */ # else ABORT(); /* for use with undump */ # endif #endif } static void init_main_stash() { 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() */ strtab = newHV(); HvSHAREKEYS_off(strtab); /* mandatory */ Newz(506,((XPVHV*)SvANY(strtab))->xhv_array, sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char); curstash = defstash = newHV(); curstname = newSVpv("main",4); gv = gv_fetchpv("main::",TRUE, SVt_PVHV); SvREFCNT_dec(GvHV(gv)); GvHV(gv) = (HV*)SvREFCNT_inc(defstash); SvREADONLY_on(gv); HvNAME(defstash) = savepv("main"); incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV))); GvMULTI_on(incgv); defgv = gv_fetchpv("_",TRUE, SVt_PVAV); errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV)); GvMULTI_on(errgv); sv_setpvn(GvSV(errgv), "", 0); curstash = defstash; compiling.cop_stash = defstash; debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV)); /* We must init $/ before switches are processed. */ sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1); } #ifdef CAN_PROTOTYPE static void open_script(char *scriptname, bool dosearch, SV *sv) #else static void open_script(scriptname,dosearch,sv) char *scriptname; bool dosearch; SV *sv; #endif { char *xfound = Nullch; char *xfailed = Nullch; register char *s; I32 len; int retval; #if defined(DOSISH) && !defined(OS2) && !defined(atarist) #define SEARCH_EXTS ".bat", ".cmd", NULL #endif #ifdef VMS # define SEARCH_EXTS ".pl", ".com", NULL #endif /* additional extensions to try in each dir if scriptname not found */ #ifdef SEARCH_EXTS char *ext[] = { SEARCH_EXTS }; int extidx = (strchr(scriptname,'.')) ? -1 : 0; /* has ext already */ #endif #ifdef VMS if (dosearch) { int hasdir, idx = 0, deftypes = 1; hasdir = (strpbrk(scriptname,":[ 0) /* reset after previous loop */ extidx = 0; do { #endif DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tokenbuf)); retval = Stat(tokenbuf,&statbuf); #ifdef SEARCH_EXTS } while ( retval < 0 /* not there */ && extidx>=0 && ext[extidx] /* try an extension? */ && strcpy(tokenbuf+len, ext[extidx++]) ); #endif if (retval < 0) continue; if (S_ISREG(statbuf.st_mode) && cando(S_IRUSR,TRUE,&statbuf) && cando(S_IXUSR,TRUE,&statbuf)) { xfound = tokenbuf; /* bingo! */ break; } if (!xfailed) xfailed = savepv(tokenbuf); } if (!xfound) croak("Can't execute %s", xfailed ? xfailed : scriptname ); if (xfailed) Safefree(xfailed); scriptname = xfound; } if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) { char *s = scriptname + 8; fdscript = atoi(s); while (isDIGIT(*s)) s++; if (*s) scriptname = s + 1; } else fdscript = -1; origfilename = savepv(e_tmpname ? "-e" : scriptname); curcop->cop_filegv = gv_fetchfile(origfilename); if (strEQ(origfilename,"-")) scriptname = ""; if (fdscript >= 0) { rsfp = PerlIO_fdopen(fdscript,"r"); #if defined(HAS_FCNTL) && defined(F_SETFD) if (rsfp) fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */ #endif } else if (preprocess) { char *cpp = CPPSTDIN; if (strEQ(cpp,"cppstdin")) sprintf(tokenbuf, "%s/%s", SCRIPTDIR, cpp); else sprintf(tokenbuf, "%s", cpp); sv_catpv(sv,"-I"); sv_catpv(sv,PRIVLIB_EXP); #ifdef MSDOS (void)sprintf(buf, "\ 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 | %s -C %s %s", (doextract ? "-e \"1,/^#/d\n\"" : ""), #else (void)sprintf(buf, "\ %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 -C %s %s", #ifdef LOC_SED LOC_SED, #else "sed", #endif (doextract ? "-e '1,/^#/d\n'" : ""), #endif scriptname, tokenbuf, SvPV(sv, na), CPPMINUS); doextract = FALSE; #ifdef IAMSUID /* actually, this is caught earlier */ if (euid != uid && !euid) { /* if running suidperl */ #ifdef HAS_SETEUID (void)seteuid(uid); /* musn't stay setuid root */ #else #ifdef HAS_SETREUID (void)setreuid((Uid_t)-1, uid); #else #ifdef HAS_SETRESUID (void)setresuid((Uid_t)-1, uid, (Uid_t)-1); #else setuid(uid); #endif #endif #endif if (geteuid() != uid) croak("Can't do seteuid!\n"); } #endif /* IAMSUID */ rsfp = my_popen(buf,"r"); } else if (!*scriptname) { forbid_setid("program input from stdin"); rsfp = PerlIO_stdin(); } else { rsfp = PerlIO_open(scriptname,"r"); #if defined(HAS_FCNTL) && defined(F_SETFD) if (rsfp) fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */ #endif } if (e_tmpname) { e_fp = rsfp; } if (!rsfp) { #ifdef DOSUID #ifndef IAMSUID /* in case script is not readable before setuid */ if (euid && Stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) { (void)sprintf(buf, "%s/sperl%s", BIN, patchlevel); execv(buf, origargv); /* try again */ croak("Can't do setuid\n"); } #endif #endif croak("Can't open perl script \"%s\": %s\n", SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno)); } } static void validate_suid(validarg, scriptname) char *validarg; char *scriptname; { 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 char *s, *s2; if (Fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */ croak("Can't stat script \"%s\"",origfilename); if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) { I32 len; #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 (access(SvPVX(GvSV(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(euid,uid) < 0 #else # if HAS_SETRESUID setresuid(euid,uid,(Uid_t)-1) < 0 # endif #endif || getuid() != euid || geteuid() != uid) croak("Can't swap uid and euid"); /* really paranoid */ if (Stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0) croak("Permission denied"); /* testing full pathname here */ if (tmpstatbuf.st_dev != statbuf.st_dev || tmpstatbuf.st_ino != statbuf.st_ino) { (void)PerlIO_close(rsfp); if (rsfp = my_popen("/bin/mail root","w")) { /* heh, heh */ PerlIO_printf(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)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino, (long)statbuf.st_dev, (long)statbuf.st_ino, SvPVX(GvSV(curcop->cop_filegv)), (long)statbuf.st_uid, (long)statbuf.st_gid); (void)my_pclose(rsfp); } croak("Permission denied\n"); } if ( #ifdef HAS_SETREUID setreuid(uid,euid) < 0 #else # if defined(HAS_SETRESUID) setresuid(uid,euid,(Uid_t)-1) < 0 # endif #endif || getuid() != uid || geteuid() != euid) croak("Can't reswap uid and euid"); if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */ croak("Permission denied\n"); } #endif /* HAS_SETREUID */ #endif /* IAMSUID */ if (!S_ISREG(statbuf.st_mode)) croak("Permission denied"); if (statbuf.st_mode & S_IWOTH) croak("Setuid/gid script is writable by world"); doswitches = FALSE; /* -s is insecure in suid */ curcop->cop_line++; if (sv_gets(linestr, rsfp, 0) == Nullch || strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */ croak("No #! line"); s = SvPV(linestr,na)+2; if (*s == ' ') s++; while (!isSPACE(*s)) s++; for (s2 = s; (s2 > SvPV(linestr,na)+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 (euid != uid && (statbuf.st_mode & S_ISUID) && euid == statbuf.st_uid) if (!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 (euid) { /* oops, we're not the setuid root perl */ (void)PerlIO_close(rsfp); #ifndef IAMSUID (void)sprintf(buf, "%s/sperl%s", BIN, patchlevel); execv(buf, origargv); /* try again */ #endif croak("Can't do setuid\n"); } if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) { #ifdef HAS_SETEGID (void)setegid(statbuf.st_gid); #else #ifdef HAS_SETREGID (void)setregid((Gid_t)-1,statbuf.st_gid); #else #ifdef HAS_SETRESGID (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1); #else setgid(statbuf.st_gid); #endif #endif #endif if (getegid() != statbuf.st_gid) croak("Can't do setegid!\n"); } if (statbuf.st_mode & S_ISUID) { if (statbuf.st_uid != euid) #ifdef HAS_SETEUID (void)seteuid(statbuf.st_uid); /* all that for this */ #else #ifdef HAS_SETREUID (void)setreuid((Uid_t)-1,statbuf.st_uid); #else #ifdef HAS_SETRESUID (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1); #else setuid(statbuf.st_uid); #endif #endif #endif if (geteuid() != statbuf.st_uid) croak("Can't do seteuid!\n"); } else if (uid) { /* oops, mustn't run as root */ #ifdef HAS_SETEUID (void)seteuid((Uid_t)uid); #else #ifdef HAS_SETREUID (void)setreuid((Uid_t)-1,(Uid_t)uid); #else #ifdef HAS_SETRESUID (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1); #else setuid((Uid_t)uid); #endif #endif #endif if (geteuid() != uid) croak("Can't do seteuid!\n"); } init_ids(); if (!cando(S_IXUSR,TRUE,&statbuf)) croak("Permission denied\n"); /* they can't do this */ } #ifdef IAMSUID else if (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(rsfp); lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */ for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ; if (!origargv[which]) croak("Permission denied"); (void)sprintf(buf, "/dev/fd/%d/%.127s", PerlIO_fileno(rsfp), origargv[which]); origargv[which] = buf; #if defined(HAS_FCNTL) && defined(F_SETFD) fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */ #endif (void)sprintf(tokenbuf, "%s/perl%s", BIN, patchlevel); execv(tokenbuf, origargv); /* try again */ croak("Can't do setuid\n"); #endif /* IAMSUID */ #else /* !DOSUID */ if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */ #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW Fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */ if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID) || (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID) ) if (!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() { register char *s, *s2; /* skip forward in input to the real script? */ forbid_setid("-x"); while (doextract) { if ((s = sv_gets(linestr, rsfp, 0)) == Nullch) croak("No Perl script found in input\n"); if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) { PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */ 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 (cddir && chdir(cddir) < 0) croak("Can't chdir to %s",cddir); } } } static void init_ids() { uid = (int)getuid(); euid = (int)geteuid(); gid = (int)getgid(); egid = (int)getegid(); #ifdef VMS uid |= gid << 16; euid |= egid << 16; #endif tainting |= (uid && (euid != uid || egid != gid)); } static void forbid_setid(s) char *s; { if (euid != uid) croak("No %s allowed while running setuid", s); if (egid != gid) croak("No %s allowed while running setgid", s); } static void init_debugger() { curstash = debstash; dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV)))); AvREAL_off(dbargs); DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV); DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV); DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV)); DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV))); sv_setiv(DBsingle, 0); DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV))); sv_setiv(DBtrace, 0); DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV))); sv_setiv(DBsignal, 0); curstash = defstash; } static void init_stacks() { curstack = newAV(); mainstack = curstack; /* remember in case we switch stacks */ AvREAL_off(curstack); /* not a real array */ av_extend(curstack,127); stack_base = AvARRAY(curstack); stack_sp = stack_base; stack_max = stack_base + 127; cxstack_max = 8192 / sizeof(CONTEXT) - 2; /* Use most of 8K. */ New(50,cxstack,cxstack_max + 1,CONTEXT); cxstack_ix = -1; New(50,tmps_stack,128,SV*); tmps_ix = -1; tmps_max = 128; DEBUG( { New(51,debname,128,char); New(52,debdelim,128,char); } ) /* * The following stacks almost certainly should be per-interpreter, * but for now they're not. XXX */ if (markstack) { markstack_ptr = markstack; } else { New(54,markstack,64,I32); markstack_ptr = markstack; markstack_max = markstack + 64; } if (scopestack) { scopestack_ix = 0; } else { New(54,scopestack,32,I32); scopestack_ix = 0; scopestack_max = 32; } if (savestack) { savestack_ix = 0; } else { New(54,savestack,128,ANY); savestack_ix = 0; savestack_max = 128; } if (retstack) { retstack_ix = 0; } else { New(54,retstack,16,OP*); retstack_ix = 0; retstack_max = 16; } } static void nuke_stacks() { Safefree(cxstack); Safefree(tmps_stack); DEBUG( { Safefree(debname); Safefree(debdelim); } ) } static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */ static void init_lexer() { tmpfp = rsfp; lex_start(linestr); rsfp = tmpfp; subname = newSVpv("main",4); } static void init_predump_symbols() { GV *tmpgv; GV *othergv; sv_setpvn(GvSV(gv_fetchpv("\"", TRUE, SVt_PV)), " ", 1); stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO); GvMULTI_on(stdingv); IoIFP(GvIOp(stdingv)) = PerlIO_stdin(); tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV); GvMULTI_on(tmpgv); GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(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(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)); statname = NEWSV(66,0); /* last filename we did stat on */ if (!osname) osname = savepv(OSNAME); } static void init_postdump_symbols(argc,argv,env) register int argc; register char **argv; register char **env; { char *s; SV *sv; GV* tmpgv; argc--,argv++; /* skip name of script */ if (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); } } toptarget = NEWSV(0,0); sv_upgrade(toptarget, SVt_PVFM); sv_setpvn(toptarget, "", 0); bodytarget = NEWSV(0,0); sv_upgrade(bodytarget, SVt_PVFM); sv_setpvn(bodytarget, "", 0); formtarget = bodytarget; TAINT; if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) { sv_setpv(GvSV(tmpgv),origfilename); magicname("0", "0", 1); } if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV)) sv_setpv(GvSV(tmpgv),origargv[0]); if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) { GvMULTI_on(argvgv); (void)gv_AVadd(argvgv); av_clear(GvAVn(argvgv)); for (; argc > 0; argc--,argv++) { av_push(GvAVn(argvgv),newSVpv(argv[0],0)); } } if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) { HV *hv; GvMULTI_on(envgv); hv = GvHVn(envgv); hv_clear(hv); #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; hv_magic(hv, envgv, 'E'); } for (; *env; env++) { if (!(s = strchr(*env,'='))) continue; *s++ = '\0'; sv = newSVpv(s--,0); sv_magic(sv, sv, 'e', *env, s - *env); (void)hv_store(hv, *env, s - *env, sv, 0); *s = '='; } #endif #ifdef DYNAMIC_ENV_FETCH HvNAME(hv) = savepv(ENV_HV_NAME); #endif hv_magic(hv, envgv, 'E'); } TAINT_NOT; if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV)) sv_setiv(GvSV(tmpgv),(I32)getpid()); } static void init_perllib() { char *s; if (!tainting) { #ifndef VMS s = getenv("PERL5LIB"); if (s) incpush(s, TRUE); else incpush(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 APPLIB (undocumented), ARCHLIB PRIVLIB SITEARCH SITELIB and OLDARCHLIB */ #ifdef APPLLIB_EXP incpush(APPLLIB_EXP, FALSE); #endif #ifdef ARCHLIB_EXP incpush(ARCHLIB_EXP, FALSE); #endif #ifndef PRIVLIB_EXP #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl" #endif incpush(PRIVLIB_EXP, FALSE); #ifdef SITEARCH_EXP incpush(SITEARCH_EXP, FALSE); #endif #ifdef SITELIB_EXP incpush(SITELIB_EXP, FALSE); #endif #ifdef OLDARCHLIB_EXP /* 5.00[01] compatibility */ incpush(OLDARCHLIB_EXP, FALSE); #endif if (!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(p, addsubdirs) char *p; int addsubdirs; { SV *subdir = Nullsv; static char *archpat_auto; if (!p) return; if (addsubdirs) { subdir = newSV(0); if (!archpat_auto) { STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel) + sizeof("//auto")); New(55, archpat_auto, len, char); sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel); #ifdef VMS for (len = sizeof(ARCHNAME) + 2; archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++) if (archpat_auto[len] == '.') archpat_auto[len] = '_'; #endif } } /* Break at all separators */ while (p && *p) { SV *libdir = newSV(0); char *s; /* skip any consecutive separators */ while ( *p == PERLLIB_SEP ) { /* Uncomment the next line for PATH semantics */ /* av_push(GvAVn(incgv), newSVpv(".", 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,na),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,na)); #endif /* .../archname/version if -d .../archname/version/auto */ sv_setsv(subdir, libdir); sv_catpv(subdir, archpat_auto); if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode)) av_push(GvAVn(incgv), newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto")); /* .../archname if -d .../archname/auto */ sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME), strlen(patchlevel) + 1, "", 0); if (Stat(SvPVX(subdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode)) av_push(GvAVn(incgv), newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto")); } /* finally push this lib directory on the end of @INC */ av_push(GvAVn(incgv), libdir); } SvREFCNT_dec(subdir); } void calllist(list) AV* list; { Sigjmp_buf oldtop; STRLEN len; line_t oldline = curcop->cop_line; Copy(top_env, oldtop, 1, Sigjmp_buf); while (AvFILL(list) >= 0) { CV *cv = (CV*)av_shift(list); SAVEFREESV(cv); switch (Sigsetjmp(top_env,1)) { case 0: { SV* atsv = GvSV(errgv); PUSHMARK(stack_sp); perl_call_sv((SV*)cv, G_EVAL|G_DISCARD); (void)SvPV(atsv, len); if (len) { Copy(oldtop, top_env, 1, Sigjmp_buf); curcop = &compiling; curcop->cop_line = oldline; if (list == beginav) sv_catpv(atsv, "BEGIN failed--compilation aborted"); else sv_catpv(atsv, "END failed--cleanup aborted"); croak("%s", SvPVX(atsv)); } } break; case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ curstash = defstash; if (endav) calllist(endav); FREETMPS; Copy(oldtop, top_env, 1, Sigjmp_buf); curcop = &compiling; curcop->cop_line = oldline; if (statusvalue) { if (list == beginav) croak("BEGIN failed--compilation aborted"); else croak("END failed--cleanup aborted"); } my_exit_jump(); /* NOTREACHED */ case 3: if (!restartop) { PerlIO_printf(PerlIO_stderr(), "panic: restartop\n"); FREETMPS; break; } Copy(oldtop, top_env, 1, Sigjmp_buf); curcop = &compiling; curcop->cop_line = oldline; Siglongjmp(top_env, 3); } } Copy(oldtop, top_env, 1, Sigjmp_buf); } void my_exit(status) U32 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() { #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 if (errno & 255) STATUS_POSIX_SET(errno); else if (STATUS_POSIX == 0) STATUS_POSIX_SET(255); #endif my_exit_jump(); } static void my_exit_jump() { register CONTEXT *cx; I32 gimme; SV **newsp; if (e_tmpname) { if (e_fp) { PerlIO_close(e_fp); e_fp = Nullfp; } (void)UNLINK(e_tmpname); Safefree(e_tmpname); e_tmpname = Nullch; } if (cxstack_ix >= 0) { if (cxstack_ix > 0) dounwind(0); POPBLOCK(cx,curpm); LEAVE; } Siglongjmp(top_env, 2); }