X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=perl.c;h=36e4795760286f3f320fbef1024c81691703f6de;hb=8ebc5c0145d2e3559bce3073437e6d027dcdffcc;hp=664c8988d0efdfc19ff6397bbea0d3e23bbc1086;hpb=1462b684862954f3522657efc93a3264698e4a9f;p=p5sagit%2Fp5-mst-13.2.git diff --git a/perl.c b/perl.c index 664c898..36e4795 100644 --- a/perl.c +++ b/perl.c @@ -1,41 +1,26 @@ -char rcsid[] = "$RCSfile: perl.c,v $$Revision: 4.0.1.4 $$Date: 91/06/10 01:23:07 $\nPatch level: ###\n"; -/* - * Copyright (c) 1991, Larry Wall +/* 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. * - * $Log: perl.c,v $ - * Revision 4.0.1.4 91/06/10 01:23:07 lwall - * patch10: perl -v printed incorrect copyright notice - * - * Revision 4.0.1.3 91/06/07 11:40:18 lwall - * patch4: changed old $^P to $^X - * - * Revision 4.0.1.2 91/06/07 11:26:16 lwall - * patch4: new copyright notice - * patch4: added $^P variable to control calling of perldb routines - * patch4: added $^F variable to specify maximum system fd, default 2 - * patch4: debugger lost track of lines in eval - * - * Revision 4.0.1.1 91/04/11 17:49:05 lwall - * patch1: fixed undefined environ problem - * - * Revision 4.0 91/03/20 01:37:44 lwall - * 4.0 baseline. - * + */ + +/* + * "A ship then new they built for him/of mithril and of elven glass" --Bilbo */ #include "EXTERN.h" #include "perl.h" -#include "perly.h" -#ifdef MSDOS -#include "patchlev.h" -#else #include "patchlevel.h" + +/* XXX If this causes problems, set i_unistd=undef in the hint file. */ +#ifdef I_UNISTD +#include #endif -char *getenv(); +dEXTCONST char rcsid[] = "perl.c\nPatch level: ###\n"; #ifdef IAMSUID #ifndef DOSUID @@ -49,68 +34,471 @@ char *getenv(); #endif #endif -static char* moreswitches(); -static char* cddir; -static bool minus_c; -static char patchlevel[6]; -static char *nrs = "\n"; -static int nrschar = '\n'; /* final char of rs, or 0777 if none */ -static int nrslen = 1; +#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 *)); +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 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; -main(argc,argv,env) -register int argc; -register char **argv; -register char **env; + 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); + +#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(); + + 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 */ + pidstatus = newHV();/* for remembering status of dead pids */ + + 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. First the syntax tree. */ + if (main_root) { + curpad = AvARRAY(comppad); + op_free(main_root); + main_root = 0; + } + 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; + + /* pid-to-status mappings for waitpid */ + SvREFCNT_dec(pidstatus); + pidstatus = Nullhv; + + /* 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: %d more ENTERs than LEAVEs\n", scopestack_ix); + if (savestack_ix != 0) + warn("Unbalanced saves: %d more saves than restores\n", savestack_ix); + if (tmps_floor != -1) + warn("Unbalanced tmps: %d more allocs than frees\n", tmps_floor + 1); + if (cxstack_ix != -1) + warn("Unbalanced context: %d more PUSHes than POPs\n", 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: %d\n", sv_count); + + sv_free_arenas(); + + linestr = NULL; /* No SVs have survived, need to clean out */ + 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 STR *str; + register SV *sv; register char *s; - char *getenv(); - bool dosearch = FALSE; -#ifdef DOSUID + char *scriptname = NULL; + VOL bool dosearch = FALSE; char *validarg = ""; -#endif + AV* comppadlist; #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW #ifdef IAMSUID #undef IAMSUID - fatal("suidperl is no longer needed since the kernel can now execute\n\ + 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; - uid = (int)getuid(); - euid = (int)geteuid(); - gid = (int)getgid(); - egid = (int)getegid(); - sprintf(patchlevel,"%3.3s%2.2d", index(rcsid,'4'), PATCHLEVEL); -#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 + e_tmpname = Nullch; + if (do_undump) { - origfilename = savestr(argv[0]); - do_undump = 0; - loop_ptr = -1; /* start label stack again */ - goto just_doit; + + /* 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; } - (void)sprintf(index(rcsid,'#'), "%d\n", PATCHLEVEL); - linestr = Str_new(65,80); - str_nset(linestr,"",0); - str = str_make("",0); /* first used for -I flags */ - curstash = defstash = hnew(0); - curstname = str_make("main",4); - stab_xhash(stabent("_main",TRUE)) = defstash; - defstash->tbl_name = "main"; - incstab = hadd(aadd(stabent("INC",TRUE))); - incstab->str_pok |= SP_MULTI; + + if (main_root) + op_free(main_root); + main_root = 0; + + switch (Sigsetjmp(top_env,1)) { + case 1: +#ifdef VMS + statusvalue = 255; +#else + statusvalue = 1; +#endif + case 2: + curstash = defstash; + if (endav) + calllist(endav); + return(statusvalue); /* my_exit() was called */ + 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; @@ -124,14 +512,20 @@ setuid perl scripts securely.\n"); 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 'T': case 'u': case 'U': case 'v': @@ -141,66 +535,115 @@ setuid perl scripts securely.\n"); break; case 'e': -#ifdef TAINT if (euid != uid || egid != gid) - fatal("No -e allowed in setuid scripts"); -#endif + croak("No -e allowed in setuid scripts"); if (!e_fp) { - e_tmpname = savestr(TMPPATH); + e_tmpname = savepv(TMPPATH); (void)mktemp(e_tmpname); - e_fp = fopen(e_tmpname,"w"); + if (!*e_tmpname) + croak("Can't mktemp()"); + e_fp = PerlIO_open(e_tmpname,"w"); if (!e_fp) - fatal("Cannot open temporary file"); + croak("Cannot open temporary file"); } - if (argv[1]) { - fputs(argv[1],e_fp); + if (*++s) + PerlIO_puts(e_fp,s); + else if (argv[1]) { + PerlIO_puts(e_fp,argv[1]); argc--,argv++; } - (void)putc('\n', e_fp); + else + croak("No code specified for -e"); + (void)PerlIO_putc(e_fp,'\n'); break; case 'I': -#ifdef TAINT - if (euid != uid || egid != gid) - fatal("No -I allowed in setuid scripts"); -#endif - str_cat(str,"-"); - str_cat(str,s); - str_cat(str," "); + forbid_setid("-I"); + sv_catpv(sv,"-"); + sv_catpv(sv,s); + sv_catpv(sv," "); if (*++s) { - (void)apush(stab_array(incstab),str_make(s,0)); + av_push(GvAVn(incgv),newSVpv(s,0)); } else if (argv[1]) { - (void)apush(stab_array(incstab),str_make(argv[1],0)); - str_cat(str,argv[1]); + av_push(GvAVn(incgv),newSVpv(argv[1],0)); + sv_catpv(sv,argv[1]); argc--,argv++; - str_cat(str," "); + sv_catpv(sv," "); } break; case 'P': -#ifdef TAINT - if (euid != uid || egid != gid) - fatal("No -P allowed in setuid scripts"); -#endif + forbid_setid("-P"); preprocess = TRUE; s++; goto reswitch; - case 's': -#ifdef TAINT - if (euid != uid || egid != gid) - fatal("No -s allowed in setuid scripts"); -#endif - doswitches = 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 = savestr(s); + cddir = savepv(s); break; case '-': argc--,argv++; @@ -208,93 +651,987 @@ setuid perl scripts securely.\n"); case 0: break; default: - fatal("Unrecognized switch: -%s",s); + croak("Unrecognized switch: -%s",s); } } switch_end: + if (!scriptname) + scriptname = argv[0]; if (e_fp) { - (void)fclose(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--; - argv[0] = e_tmpname; + scriptname = e_tmpname; } - + else if (scriptname == Nullch) { #ifdef MSDOS -#define PERLLIB_SEP ';' + 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(); + + 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: + curstash = defstash; + if (endav) + calllist(endav); + FREETMPS; +#ifdef DEBUGGING_MSTATS + if (getenv("PERL_DEBUG_MSTATS")) + dump_mstats("after execution: "); +#endif + return(statusvalue); /* my_exit() was called */ + 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) { + op = main_start; + runops(); + } + + my_exit(0); + return 0; +} + +void +my_exit(status) +U32 status; +{ + register CONTEXT *cx; + I32 gimme; + SV **newsp; + + statusvalue = FIXSTATUS(status); + if (cxstack_ix >= 0) { + if (cxstack_ix > 0) + dounwind(0); + POPBLOCK(cx,curpm); + LEAVE; + } + Siglongjmp(top_env, 2); +} + +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(), + 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 = TOPMARK; + I32 retval; + Sigjmp_buf oldtop; + I32 oldscope; + static CV *DBcv; + + if (flags & G_DISCARD) { + ENTER; + SAVETMPS; + } + + SAVESPTR(op); + op = (OP*)&myop; + Zero(op, 1, LOGOP); + 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_flags |= OPf_KNOW; + if (flags & G_ARRAY) + myop.op_flags |= OPf_LIST; + + 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: +#ifdef VMS + statusvalue = 255; /* XXX I don't think we use 1 anymore. */ #else -#define PERLLIB_SEP ':' + statusvalue = 1; #endif -#ifndef TAINT /* Can't allow arbitrary PERLLIB in setuid script */ - { - char * s2 = getenv("PERLLIB"); - - if ( s2 ) { - /* Break at all separators */ - while ( *s2 ) { - /* First, skip any consecutive separators */ - while ( *s2 == PERLLIB_SEP ) { - /* Uncomment the next line for PATH semantics */ - /* (void)apush(stab_array(incstab),str_make(".",1)); */ - s2++; - } - if ( (s = index(s2,PERLLIB_SEP)) != Nullch ) { - (void)apush(stab_array(incstab),str_make(s2,(int)(s-s2))); - s2 = s+1; - } else { - (void)apush(stab_array(incstab),str_make(s2,0)); - break; - } + /* 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(statusvalue); + /* 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; } } -#endif /* TAINT */ -#ifndef PRIVLIB -#define PRIVLIB "/usr/local/lib/perl" + 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: +#ifdef VMS + statusvalue = 255; /* XXX I don't think we use 1 anymore. */ +#else + statusvalue = 1; +#endif + /* 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(statusvalue); + /* 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); +} + +#if defined(DOSISH) +# define PERLLIB_SEP ';' +#else +# if defined(VMS) +# define PERLLIB_SEP '|' +# else +# define PERLLIB_SEP ':' +# endif #endif - (void)apush(stab_array(incstab),str_make(PRIVLIB,0)); - (void)apush(stab_array(incstab),str_make(".",1)); +#ifndef PERLLIB_MANGLE +# define PERLLIB_MANGLE(s,n) (s) +#endif - str_set(&str_no,No); - str_set(&str_yes,Yes); +static void +incpush(p) +char *p; +{ + char *s; + + if (!p) + return; + + /* Break at all separators */ + while (*p) { + /* First, 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 ) { + av_push(GvAVn(incgv), newSVpv(PERLLIB_MANGLE(p, (STRLEN)(s - p)), + (STRLEN)(s - p))); + p = s + 1; + } else { + av_push(GvAVn(incgv), newSVpv(PERLLIB_MANGLE(p, 0), 0)); + break; + } + } +} + +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; - /* open script */ + 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; - if (argv[0] == Nullch) + 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; + for (e = s; *e && !isSPACE(*e); e++) ; + av_push(GvAVn(incgv),newSVpv(s,e-s)); + 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': + tainting = TRUE; + 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 1987-1996, Larry Wall\n"); + printf("\n\t+ suidperl security patch"); #ifdef MSDOS - { - if ( isatty(fileno(stdin)) ) - moreswitches("v"); - argv[0] = "-"; + 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; + 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 - argv[0] = "-"; +# ifdef VMS +# include + lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */ +#else + ABORT(); /* for use with undump */ +#endif #endif - if (dosearch && !index(argv[0], '/') && (s = getenv("PATH"))) { - char *xfound = Nullch, *xfailed = Nullch; - int len; +} + +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 (stat(tokenbuf,&statbuf) < 0) /* not there? */ + if (retval < 0) continue; if (S_ISREG(statbuf.st_mode) && cando(S_IRUSR,TRUE,&statbuf) && cando(S_IXUSR,TRUE,&statbuf)) { @@ -302,84 +1639,140 @@ setuid perl scripts securely.\n"); break; } if (!xfailed) - xfailed = savestr(tokenbuf); + xfailed = savepv(tokenbuf); } if (!xfound) - fatal("Can't execute %s", xfailed ? xfailed : argv[0] ); + croak("Can't execute %s", xfailed ? xfailed : scriptname ); if (xfailed) Safefree(xfailed); - argv[0] = savestr(xfound); + scriptname = xfound; } - fdpid = anew(Nullstab); /* for remembering popen pids by fd */ - pidstatus = hnew(COEFFSIZE);/* for remembering status of dead pids */ - - origfilename = savestr(argv[0]); - curcmd->c_filestab = fstab(origfilename); + 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,"-")) - argv[0] = ""; - if (preprocess) { - str_cat(str,"-I"); - str_cat(str,PRIVLIB); + 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, "\ -%ssed %s -e '/^[^#]/b' \ +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/^#.*//' \ + -e 's/^[ ]*#.*//' \ %s | %s -C %s %s", -#ifdef MSDOS - "", +#ifdef LOC_SED + LOC_SED, #else - "/bin/", + "sed", #endif (doextract ? "-e '1,/^#/d\n'" : ""), - argv[0], CPPSTDIN, str_get(str), CPPMINUS); -#ifdef DEBUGGING - if (debug & 64) { - fputs(buf,stderr); - fputs("\n",stderr); - } #endif + scriptname, tokenbuf, SvPV(sv, na), CPPMINUS); doextract = FALSE; #ifdef IAMSUID /* actually, this is caught earlier */ - if (euid != uid && !euid) /* if running suidperl */ + if (euid != uid && !euid) { /* if running suidperl */ #ifdef HAS_SETEUID (void)seteuid(uid); /* musn't stay setuid root */ #else #ifdef HAS_SETREUID - (void)setreuid(-1, uid); + (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 = mypopen(buf,"r"); + rsfp = my_popen(buf,"r"); } - else if (!*argv[0]) - rsfp = stdin; - else - rsfp = fopen(argv[0],"r"); - if (rsfp == Nullfp) { + 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(stab_val(curcmd->c_filestab)->str_ptr,&statbuf) >= 0 && + 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 */ - fatal("Can't do setuid\n"); + croak("Can't do setuid\n"); } #endif #endif - fatal("Can't open perl script \"%s\": %s\n", - stab_val(curcmd->c_filestab)->str_ptr, strerror(errno)); + croak("Can't open perl script \"%s\": %s\n", + SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno)); } - str_free(str); /* free -I directories */ - str = Nullstr; +} + +static void +validate_suid(validarg, scriptname) +char *validarg; +char *scriptname; +{ + int which; /* do we need to emulate setuid on scripts? */ @@ -399,20 +1792,15 @@ setuid perl scripts securely.\n"); * 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. - * - * There is also the possibility of have a script which is running - * set-id due to a C wrapper. We want to do the TAINT checks - * on these set-id scripts, but don't want to have the overhead of - * them in normal perl, and can't use suidperl because it will lose - * the effective uid info, so we have an additional non-setuid root - * version called taintperl or tperlN.NNN that just does the TAINT checks. */ #ifdef DOSUID - if (fstat(fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */ - fatal("Can't stat script \"%s\"",origfilename); - if (statbuf.st_mode & (S_ISUID|S_ISGID)) { - int len; + 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 @@ -424,8 +1812,8 @@ setuid perl scripts securely.\n"); * But I don't think it's too important. The manual lies when * it says access() is useful in setuid programs. */ - if (access(stab_val(curcmd->c_filestab)->str_ptr,1)) /*double check*/ - fatal("Permission denied"); + 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 @@ -435,47 +1823,65 @@ setuid perl scripts securely.\n"); { struct stat tmpstatbuf; - if (setreuid(euid,uid) < 0 || getuid() != euid || geteuid() != uid) - fatal("Can't swap uid and euid"); /* really paranoid */ - if (stat(stab_val(curcmd->c_filestab)->str_ptr,&tmpstatbuf) < 0) - fatal("Permission denied"); /* testing full pathname here */ + 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)fclose(rsfp); - if (rsfp = mypopen("/bin/mail root","w")) { /* heh, heh */ - fprintf(rsfp, + (void)PerlIO_close(rsfp); + if (rsfp = my_popen("/bin/mail root","w")) { /* heh, heh */ + PerlIO_printf(rsfp, "User %d tried to run dev %d ino %d in place of dev %d ino %d!\n\ (Filename of set-id script was %s, uid %d gid %d.)\n\nSincerely,\nperl\n", uid,tmpstatbuf.st_dev, tmpstatbuf.st_ino, statbuf.st_dev, statbuf.st_ino, - stab_val(curcmd->c_filestab)->str_ptr, + SvPVX(GvSV(curcop->cop_filegv)), statbuf.st_uid, statbuf.st_gid); - (void)mypclose(rsfp); + (void)my_pclose(rsfp); } - fatal("Permission denied\n"); + croak("Permission denied\n"); } - if (setreuid(uid,euid) < 0 || getuid() != uid || geteuid() != euid) - fatal("Can't reswap uid and euid"); + 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? */ - fatal("Permission denied\n"); + croak("Permission denied\n"); } #endif /* HAS_SETREUID */ #endif /* IAMSUID */ if (!S_ISREG(statbuf.st_mode)) - fatal("Permission denied"); + croak("Permission denied"); if (statbuf.st_mode & S_IWOTH) - fatal("Setuid/gid script is writable by world"); + croak("Setuid/gid script is writable by world"); doswitches = FALSE; /* -s is insecure in suid */ - curcmd->c_line++; - if (fgets(tokenbuf,sizeof tokenbuf, rsfp) == Nullch || - strnNE(tokenbuf,"#!",2) ) /* required even on Sys V */ - fatal("No #! line"); - s = tokenbuf+2; + 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++; - if (strnNE(s-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */ - fatal("Not a perl script"); + 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 @@ -484,775 +1890,532 @@ setuid perl scripts securely.\n"); */ len = strlen(validarg); if (strEQ(validarg," PHOOEY ") || - strnNE(s,validarg,len) || !isspace(s[len])) - fatal("Args must match #! line"); + 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) - fatal("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\ + 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)fclose(rsfp); + (void)PerlIO_close(rsfp); #ifndef IAMSUID (void)sprintf(buf, "%s/sperl%s", BIN, patchlevel); execv(buf, origargv); /* try again */ #endif - fatal("Can't do setuid\n"); + croak("Can't do setuid\n"); } - if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) + if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) { #ifdef HAS_SETEGID (void)setegid(statbuf.st_gid); #else #ifdef HAS_SETREGID - (void)setregid((GIDTYPE)-1,statbuf.st_gid); + (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((UIDTYPE)-1,statbuf.st_uid); + (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 */ + else if (uid) { /* oops, mustn't run as root */ #ifdef HAS_SETEUID - (void)seteuid((UIDTYPE)uid); + (void)seteuid((Uid_t)uid); #else #ifdef HAS_SETREUID - (void)setreuid((UIDTYPE)-1,(UIDTYPE)uid); + (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((UIDTYPE)uid); + setuid((Uid_t)uid); #endif #endif - uid = (int)getuid(); - euid = (int)geteuid(); - gid = (int)getgid(); - egid = (int)getegid(); +#endif + if (geteuid() != uid) + croak("Can't do seteuid!\n"); + } + init_ids(); if (!cando(S_IXUSR,TRUE,&statbuf)) - fatal("Permission denied\n"); /* they can't do this */ + croak("Permission denied\n"); /* they can't do this */ } #ifdef IAMSUID else if (preprocess) - fatal("-P not allowed for setuid/setgid script\n"); + croak("-P not allowed for setuid/setgid script\n"); + else if (fdscript >= 0) + croak("fd script not allowed in suidperl\n"); else - fatal("Script is not setuid/setgid in suidperl\n"); -#else -#ifndef TAINT /* we aren't taintperl or suidperl */ - /* script has a wrapper--can't run suidperl or we lose euid */ - else if (euid != uid || egid != gid) { - (void)fclose(rsfp); - (void)sprintf(buf, "%s/tperl%s", BIN, patchlevel); - execv(buf, origargv); /* try again */ - fatal("Can't run setuid script with taint checks"); - } -#endif /* TAINT */ + 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 */ -#ifndef TAINT /* we aren't taintperl or suidperl */ if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */ #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW - fstat(fileno(rsfp),&statbuf); /* may be either wrapped or real suid */ + 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) - fatal("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\ + 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 */ - (void)fclose(rsfp); - (void)sprintf(buf, "%s/tperl%s", BIN, patchlevel); - execv(buf, origargv); /* try again */ - fatal("Can't run setuid script with taint checks"); } -#endif /* TAINT */ #endif /* DOSUID */ +} -#if !defined(IAMSUID) && !defined(TAINT) +static void +find_beginning() +{ + register char *s, *s2; /* skip forward in input to the real script? */ + forbid_setid("-x"); while (doextract) { - if ((s = str_gets(linestr, rsfp, 0)) == Nullch) - fatal("No Perl script found in input\n"); - if (*s == '#' && s[1] == '!' && instr(s,"perl")) { - ungetc('\n',rsfp); /* to keep line count right */ + 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; - if (s = instr(s,"perl -")) { - s += 6; - while (s = moreswitches(s)) ; + 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) - fatal("Can't chdir to %s",cddir); + croak("Can't chdir to %s",cddir); } } -#endif /* !defined(IAMSUID) && !defined(TAINT) */ - - defstab = stabent("_",TRUE); - - if (perldb) { - debstash = hnew(0); - stab_xhash(stabent("_DB",TRUE)) = debstash; - curstash = debstash; - dbargs = stab_xarray(aadd((tmpstab = stabent("args",TRUE)))); - tmpstab->str_pok |= SP_MULTI; - dbargs->ary_flags = 0; - subname = str_make("main",4); - DBstab = stabent("DB",TRUE); - DBstab->str_pok |= SP_MULTI; - DBline = stabent("dbline",TRUE); - DBline->str_pok |= SP_MULTI; - DBsub = hadd(tmpstab = stabent("sub",TRUE)); - tmpstab->str_pok |= SP_MULTI; - DBsingle = stab_val((tmpstab = stabent("single",TRUE))); - tmpstab->str_pok |= SP_MULTI; - DBtrace = stab_val((tmpstab = stabent("trace",TRUE))); - tmpstab->str_pok |= SP_MULTI; - DBsignal = stab_val((tmpstab = stabent("signal",TRUE))); - tmpstab->str_pok |= SP_MULTI; - curstash = defstash; - } +} - /* init tokener */ +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)); +} - bufend = bufptr = str_get(linestr); +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); +} - savestack = anew(Nullstab); /* for saving non-local values */ - stack = anew(Nullstab); /* for saving non-local values */ - stack->ary_flags = 0; /* not a real array */ - afill(stack,63); afill(stack,-1); /* preextend stack */ - afill(savestack,63); afill(savestack,-1); +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; +} - /* now parse the script */ +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); - error_count = 0; - if (yyparse() || error_count) { - if (minus_c) - fatal("%s had compilation errors.\n", origfilename); - else { - fatal("Execution of %s aborted due to compilation errors.\n", - origfilename); - } - } + stack_base = AvARRAY(curstack); + stack_sp = stack_base; + stack_max = stack_base + 127; - New(50,loop_stack,128,struct loop); -#ifdef DEBUGGING - if (debug) { + 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); - } -#endif - curstash = defstash; + } ) - preprocess = FALSE; - if (e_fp) { - e_fp = Nullfp; - (void)UNLINK(e_tmpname); + /* + * 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; } - /* initialize everything that won't change if we undump */ + if (scopestack) { + scopestack_ix = 0; + } else { + New(54,scopestack,32,I32); + scopestack_ix = 0; + scopestack_max = 32; + } - if (sigstab = stabent("SIG",allstabs)) { - sigstab->str_pok |= SP_MULTI; - (void)hadd(sigstab); + if (savestack) { + savestack_ix = 0; + } else { + New(54,savestack,128,ANY); + savestack_ix = 0; + savestack_max = 128; } - magicalize("!#?^~=-%.+&*()<>,\\/[|`':\004\t\020\024\027\006"); - userinit(); /* in case linked C routines want magical variables */ + if (retstack) { + retstack_ix = 0; + } else { + New(54,retstack,16,OP*); + retstack_ix = 0; + retstack_max = 16; + } +} - amperstab = stabent("&",allstabs); - leftstab = stabent("`",allstabs); - rightstab = stabent("'",allstabs); - sawampersand = (amperstab || leftstab || rightstab); - if (tmpstab = stabent(":",allstabs)) - str_set(STAB_STR(tmpstab),chopset); - if (tmpstab = stabent("\024",allstabs)) - time(&basetime); +static void +nuke_stacks() +{ + Safefree(cxstack); + Safefree(tmps_stack); + DEBUG( { + Safefree(debname); + Safefree(debdelim); + } ) +} - /* these aren't necessarily magical */ - if (tmpstab = stabent(";",allstabs)) - str_set(STAB_STR(tmpstab),"\034"); - if (tmpstab = stabent("]",allstabs)) { - str = STAB_STR(tmpstab); - str_set(str,rcsid); - str->str_u.str_nval = atof(patchlevel); - str->str_nok = 1; - } - str_nset(stab_val(stabent("\"", TRUE)), " ", 1); - - stdinstab = stabent("STDIN",TRUE); - stdinstab->str_pok |= SP_MULTI; - stab_io(stdinstab) = stio_new(); - stab_io(stdinstab)->ifp = stdin; - tmpstab = stabent("stdin",TRUE); - stab_io(tmpstab) = stab_io(stdinstab); - tmpstab->str_pok |= SP_MULTI; - - tmpstab = stabent("STDOUT",TRUE); - tmpstab->str_pok |= SP_MULTI; - stab_io(tmpstab) = stio_new(); - stab_io(tmpstab)->ofp = stab_io(tmpstab)->ifp = stdout; - defoutstab = tmpstab; - tmpstab = stabent("stdout",TRUE); - stab_io(tmpstab) = stab_io(defoutstab); - tmpstab->str_pok |= SP_MULTI; - - curoutstab = stabent("STDERR",TRUE); - curoutstab->str_pok |= SP_MULTI; - stab_io(curoutstab) = stio_new(); - stab_io(curoutstab)->ofp = stab_io(curoutstab)->ifp = stderr; - tmpstab = stabent("stderr",TRUE); - stab_io(tmpstab) = stab_io(curoutstab); - tmpstab->str_pok |= SP_MULTI; - curoutstab = defoutstab; /* switch back to STDOUT */ - - statname = Str_new(66,0); /* last filename we did stat on */ +static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */ - /* now that script is parsed, we can modify record separator */ +static void +init_lexer() +{ + tmpfp = rsfp; + lex_start(linestr); + rsfp = tmpfp; + subname = newSVpv("main",4); +} - rs = nrs; - rslen = nrslen; - rschar = nrschar; - str_nset(stab_val(stabent("/", TRUE)), rs, rslen); +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); +} - if (do_undump) - my_unexec(); +static void +init_postdump_symbols(argc,argv,env) +register int argc; +register char **argv; +register char **env; +{ + char *s; + SV *sv; + GV* tmpgv; - just_doit: /* come here if running an undumped a.out */ 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 = index(argv[0], '=')) { + if (s = strchr(argv[0], '=')) { *s++ = '\0'; - str_set(stab_val(stabent(argv[0]+1,TRUE)),s); + sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s); } else - str_numset(stab_val(stabent(argv[0]+1,TRUE)),(double)1.0); + sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1); } } -#ifdef TAINT - tainted = 1; -#endif - if (tmpstab = stabent("0",allstabs)) { - str_set(stab_val(tmpstab),origfilename); - magicname("0", Nullch, 0); + 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 (tmpstab = stabent("\030",allstabs)) - str_set(stab_val(tmpstab),origargv[0]); - if (argvstab = stabent("ARGV",allstabs)) { - argvstab->str_pok |= SP_MULTI; - (void)aadd(argvstab); - aclear(stab_array(argvstab)); + if (tmpgv = gv_fetchpv("\024",TRUE, SVt_PV)) + time(&basetime); + 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++) { - (void)apush(stab_array(argvstab),str_make(argv[0],0)); + av_push(GvAVn(argvgv),newSVpv(argv[0],0)); } } -#ifdef TAINT - (void) stabent("ENV",TRUE); /* must test PATH and IFS */ -#endif - if (envstab = stabent("ENV",allstabs)) { - envstab->str_pok |= SP_MULTI; - (void)hadd(envstab); - hclear(stab_hash(envstab), FALSE); - if (env != environ) + 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 = index(*env,'='))) + if (!(s = strchr(*env,'='))) continue; *s++ = '\0'; - str = str_make(s--,0); - str_magic(str, envstab, 'E', *env, s - *env); - (void)hstore(stab_hash(envstab), *env, s - *env, str, 0); + sv = newSVpv(s--,0); + sv_magic(sv, sv, 'e', *env, s - *env); + (void)hv_store(hv, *env, s - *env, sv, 0); *s = '='; } - } -#ifdef TAINT - tainted = 0; #endif - if (tmpstab = stabent("$",allstabs)) - str_numset(STAB_STR(tmpstab),(double)getpid()); - - if (dowarn) { - stab_check('A','Z'); - stab_check('a','z'); - } - - if (setjmp(top_env)) /* sets goto_targ on longjump */ - loop_ptr = -1; /* start label stack again */ - -#ifdef DEBUGGING - if (debug & 1024) - dump_all(); - if (debug) - fprintf(stderr,"\nEXECUTING...\n\n"); +#ifdef DYNAMIC_ENV_FETCH + HvNAME(hv) = savepv(ENV_HV_NAME); #endif - - if (minus_c) { - fprintf(stderr,"%s syntax OK\n", origfilename); - exit(0); - } - - /* do it */ - - (void) cmd_exec(main_root,G_SCALAR,-1); - - if (goto_targ) - fatal("Can't find label \"%s\"--aborting",goto_targ); - exit(0); - /* NOTREACHED */ -} - -void -magicalize(list) -register char *list; -{ - char sym[2]; - - sym[1] = '\0'; - while (*sym = *list++) - magicname(sym, Nullch, 0); -} - -void -magicname(sym,name,namlen) -char *sym; -char *name; -int namlen; -{ - register STAB *stab; - - if (stab = stabent(sym,allstabs)) { - stab_flags(stab) = SF_VMAGIC; - str_magic(stab_val(stab), stab, 0, name, namlen); + hv_magic(hv, envgv, 'E'); } + TAINT_NOT; + if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV)) + sv_setiv(GvSV(tmpgv),(I32)getpid()); } -void -savelines(array, str) -ARRAY *array; -STR *str; +static void +init_perllib() { - register char *s = str->str_ptr; - register char *send = str->str_ptr + str->str_cur; - register char *t; - register int line = 1; - - while (s && s < send) { - STR *tmpstr = Str_new(85,0); - - t = index(s, '\n'); - if (t) - t++; + char *s; + if (!tainting) { +#ifndef VMS + s = getenv("PERL5LIB"); + if (s) + incpush(s); else - t = send; - - str_nset(tmpstr, s, t - s); - astore(array, line++, tmpstr); - s = t; - } -} - -/* this routine is in perl.c by virtue of being sort of an alternate main() */ - -int -do_eval(str,optype,stash,gimme,arglast) -STR *str; -int optype; -HASH *stash; -int gimme; -int *arglast; -{ - STR **st = stack->ary_array; - int retval; - CMD *myroot = Nullcmd; - ARRAY *ar; - int i; - CMD * VOLATILE oldcurcmd = curcmd; - VOLATILE int oldtmps_base = tmps_base; - VOLATILE int oldsave = savestack->ary_fill; - VOLATILE int oldperldb = perldb; - SPAT * VOLATILE oldspat = curspat; - SPAT * VOLATILE oldlspat = lastspat; - static char *last_eval = Nullch; - static CMD *last_root = Nullcmd; - VOLATILE int sp = arglast[0]; - char *specfilename; - char *tmpfilename; - int parsing = 1; - - tmps_base = tmps_max; - if (curstash != stash) { - (void)savehptr(&curstash); - curstash = stash; - } - str_set(stab_val(stabent("@",TRUE)),""); - if (curcmd->c_line == 0) /* don't debug debugger... */ - perldb = FALSE; - curcmd = &compiling; - if (optype == O_EVAL) { /* normal eval */ - curcmd->c_filestab = fstab("(eval)"); - curcmd->c_line = 1; - str_sset(linestr,str); - str_cat(linestr,";\n"); /* be kind to them */ - if (perldb) - savelines(stab_xarray(curcmd->c_filestab), linestr); - } - else { - if (last_root && !in_eval) { - Safefree(last_eval); - last_eval = Nullch; - cmd_free(last_root); - last_root = Nullcmd; - } - specfilename = str_get(str); - str_set(linestr,""); - if (optype == O_REQUIRE && &str_undef != - hfetch(stab_hash(incstab), specfilename, strlen(specfilename), 0)) { - curcmd = oldcurcmd; - tmps_base = oldtmps_base; - st[++sp] = &str_yes; - perldb = oldperldb; - return sp; - } - tmpfilename = savestr(specfilename); - if (index("/.", *tmpfilename)) - rsfp = fopen(tmpfilename,"r"); - else { - ar = stab_array(incstab); - for (i = 0; i <= ar->ary_fill; i++) { - (void)sprintf(buf, "%s/%s", - str_get(afetch(ar,i,TRUE)), specfilename); - rsfp = fopen(buf,"r"); - if (rsfp) { - char *s = buf; - - if (*s == '.' && s[1] == '/') - s += 2; - Safefree(tmpfilename); - tmpfilename = savestr(s); - break; - } - } - } - curcmd->c_filestab = fstab(tmpfilename); - Safefree(tmpfilename); - tmpfilename = Nullch; - if (!rsfp) { - curcmd = oldcurcmd; - tmps_base = oldtmps_base; - if (optype == O_REQUIRE) { - sprintf(tokenbuf,"Can't locate %s in @INC", specfilename); - if (instr(tokenbuf,".h ")) - strcat(tokenbuf," (change .h to .ph maybe?)"); - if (instr(tokenbuf,".ph ")) - strcat(tokenbuf," (did you run h2ph?)"); - fatal("%s",tokenbuf); - } - if (gimme != G_ARRAY) - st[++sp] = &str_undef; - perldb = oldperldb; - return sp; - } - curcmd->c_line = 0; - } - in_eval++; - oldoldbufptr = oldbufptr = bufptr = str_get(linestr); - bufend = bufptr + linestr->str_cur; - if (++loop_ptr >= loop_max) { - loop_max += 128; - Renew(loop_stack, loop_max, struct loop); - } - loop_stack[loop_ptr].loop_label = "_EVAL_"; - loop_stack[loop_ptr].loop_sp = sp; -#ifdef DEBUGGING - if (debug & 4) { - deb("(Pushing label #%d _EVAL_)\n", loop_ptr); - } -#endif - eval_root = Nullcmd; - if (setjmp(loop_stack[loop_ptr].loop_env)) { - retval = 1; - } - else { - error_count = 0; - if (rsfp) { - retval = yyparse(); - retval |= error_count; - } - else if (last_root && *bufptr == *last_eval && strEQ(bufptr,last_eval)){ - retval = 0; - eval_root = last_root; /* no point in reparsing */ - } - else if (in_eval == 1) { - if (last_root) { - Safefree(last_eval); - last_eval = Nullch; - cmd_free(last_root); - } - last_root = Nullcmd; - last_eval = savestr(bufptr); - retval = yyparse(); - retval |= error_count; - if (!retval) - last_root = eval_root; - if (!last_root) { - Safefree(last_eval); - last_eval = Nullch; - } - } + incpush(getenv("PERLLIB")); +#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); } while (my_trnlnm("PERL5LIB",buf,++idx)); else - retval = yyparse(); - } - myroot = eval_root; /* in case cmd_exec does another eval! */ - - if (retval) { - st = stack->ary_array; - sp = arglast[0]; - if (gimme != G_ARRAY) - st[++sp] = &str_undef; - if (parsing) { -#ifndef MANGLEDPARSE -#ifdef DEBUGGING - if (debug & 128) - fprintf(stderr,"Freeing eval_root %lx\n",(long)eval_root); -#endif - cmd_free(eval_root); -#endif - if (eval_root == last_root) - last_root = Nullcmd; - eval_root = myroot = Nullcmd; - } - if (rsfp) { - fclose(rsfp); - rsfp = 0; - } - } - else { - parsing = 0; - sp = cmd_exec(eval_root,gimme,sp); - st = stack->ary_array; - for (i = arglast[0] + 1; i <= sp; i++) - st[i] = str_mortal(st[i]); - /* if we don't save result, free zaps it */ - if (in_eval != 1 && myroot != last_root) - cmd_free(myroot); + while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf); +#endif /* VMS */ } - perldb = oldperldb; - in_eval--; -#ifdef DEBUGGING - if (debug & 4) { - char *tmps = loop_stack[loop_ptr].loop_label; - deb("(Popping label #%d %s)\n",loop_ptr, - tmps ? tmps : "" ); - } +/* Use the ~-expanded versions of APPLIB (undocumented), + ARCHLIB PRIVLIB SITEARCH SITELIB and OLDARCHLIB +*/ +#ifdef APPLLIB_EXP + incpush(APPLLIB_EXP); #endif - loop_ptr--; - tmps_base = oldtmps_base; - curspat = oldspat; - lastspat = oldlspat; - if (savestack->ary_fill > oldsave) /* let them use local() */ - restorelist(oldsave); - - if (optype != O_EVAL) { - if (retval) { - if (optype == O_REQUIRE) - fatal("%s", str_get(stab_val(stabent("@",TRUE)))); - } - else { - curcmd = oldcurcmd; - if (gimme == G_SCALAR ? str_true(st[sp]) : sp > arglast[0]) { - (void)hstore(stab_hash(incstab), specfilename, - strlen(specfilename), str_smake(stab_val(curcmd->c_filestab)), - 0 ); - } - else if (optype == O_REQUIRE) - fatal("%s did not return a true value", specfilename); - } - } - curcmd = oldcurcmd; - return sp; -} - -/* This routine handles any switches that can be given during run */ - -static char * -moreswitches(s) -char *s; -{ - int numlen; - reswitch: - switch (*s) { - case '0': - nrschar = scanoct(s, 4, &numlen); - nrs = nsavestr("\n",1); - *nrs = nrschar; - if (nrschar > 0377) { - nrslen = 0; - nrs = ""; - } - else if (!nrschar && numlen >= 2) { - nrslen = 2; - nrs = "\n\n"; - nrschar = '\n'; - } - return s + numlen; - case 'a': - minus_a = TRUE; - s++; - return s; - case 'c': - minus_c = TRUE; - s++; - return s; - case 'd': -#ifdef TAINT - if (euid != uid || egid != gid) - fatal("No -d allowed in setuid scripts"); -#endif - perldb = TRUE; - s++; - return s; - case 'D': -#ifdef DEBUGGING -#ifdef TAINT - if (euid != uid || egid != gid) - fatal("No -D allowed in setuid scripts"); -#endif - debug = atoi(s+1) | 32768; -#else - warn("Recompile perl with -DDEBUGGING to use -D switch\n"); +#ifdef ARCHLIB_EXP + incpush(ARCHLIB_EXP); #endif - for (s++; isdigit(*s); s++) ; - return s; - case 'i': - inplace = savestr(s+1); - for (s = inplace; *s && !isspace(*s); s++) ; - *s = '\0'; - break; - case 'I': -#ifdef TAINT - if (euid != uid || egid != gid) - fatal("No -I allowed in setuid scripts"); +#ifndef PRIVLIB_EXP +#define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl" #endif - if (*++s) { - (void)apush(stab_array(incstab),str_make(s,0)); - } - else - fatal("No space allowed after -I"); - break; - case 'l': - minus_l = TRUE; - s++; - if (isdigit(*s)) { - ors = savestr("\n"); - orslen = 1; - *ors = scanoct(s, 3 + (*s == '0'), &numlen); - s += numlen; - } - else { - ors = nsavestr(nrs,nrslen); - orslen = nrslen; - } - return s; - case 'n': - minus_n = TRUE; - s++; - return s; - case 'p': - minus_p = TRUE; - s++; - return s; - case 'u': - do_undump = TRUE; - s++; - return s; - case 'U': - unsafe = TRUE; - s++; - return s; - case 'v': - fputs("\nThis is perl, version 4.0\n\n",stdout); - fputs(rcsid,stdout); - fputs("\nCopyright (c) 1989, 1990, 1991, Larry Wall\n",stdout); -#ifdef MSDOS - fputs("MS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n", - stdout); -#ifdef OS2 - fputs("OS/2 port Copyright (c) 1990, Raymond Chen, Kai Uwe Rommel\n", - stdout); + incpush(PRIVLIB_EXP); + +#ifdef SITEARCH_EXP + incpush(SITEARCH_EXP); #endif +#ifdef SITELIB_EXP + incpush(SITELIB_EXP); #endif - fputs("\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 4.0 source kit.\n",stdout); -#ifdef MSDOS - usage(origargv[0]); +#ifdef OLDARCHLIB_EXP /* 5.00[01] compatibility */ + incpush(OLDARCHLIB_EXP); #endif - exit(0); - case 'w': - dowarn = TRUE; - s++; - return s; - case ' ': - case '\n': - case '\t': - break; - default: - fatal("Switch meaningless after -x: -%s",s); - } - return Nullch; + + if (!tainting) + incpush("."); } -/* compliments of Tom Christiansen */ - -/* unexec() can be found in the Gnu emacs distribution */ - -my_unexec() +void +calllist(list) +AV* list; { -#ifdef UNEXEC - int status; - extern int etext; - static char dumpname[BUFSIZ]; - static char perlpath[256]; - - sprintf (dumpname, "%s.perldump", origfilename); - sprintf (perlpath, "%s/perl", BIN); - - status = unexec(dumpname, perlpath, &etext, sbrk(0), 0); - if (status) - fprintf(stderr, "unexec of %s into %s failed!\n", perlpath, dumpname); - exit(status); + 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: +#ifdef VMS + statusvalue = 255; /* XXX I don't think we use 1 anymore. */ #else -#ifdef MSDOS - abort(); /* nothing else to do */ -#else /* ! MSDOS */ -# ifndef SIGABRT -# define SIGABRT SIGILL -# endif -# ifndef SIGILL -# define SIGILL 6 /* blech */ -# endif - kill(getpid(),SIGABRT); /* for use with undump */ -#endif /* ! MSDOS */ + statusvalue = 1; #endif + /* 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(statusvalue); + /* NOTREACHED */ + return; + 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); }