diff options
Diffstat (limited to 'perl.c.orig')
| -rw-r--r-- | perl.c.orig | 1440 |
1 files changed, 0 insertions, 1440 deletions
diff --git a/perl.c.orig b/perl.c.orig deleted file mode 100644 index 7a41d2bf7d..0000000000 --- a/perl.c.orig +++ /dev/null @@ -1,1440 +0,0 @@ -char rcsid[] = "$RCSfile: perl.c,v $$Revision: 4.0.1.7 $$Date: 92/06/08 14:50:39 $\nPatch level: ###\n"; -/* - * Copyright (c) 1991, 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 4.0.1.7 92/06/08 14:50:39 lwall - * patch20: PERLLIB now supports multiple directories - * patch20: running taintperl explicitly now does checks even if $< == $> - * patch20: -e 'cmd' no longer fails silently if /tmp runs out of space - * patch20: perl -P now uses location of sed determined by Configure - * patch20: form feed for formats is now specifiable via $^L - * patch20: paragraph mode now skips extra newlines automatically - * patch20: eval "1 #comment" didn't work - * patch20: couldn't require . files - * patch20: semantic compilation errors didn't abort execution - * - * Revision 4.0.1.6 91/11/11 16:38:45 lwall - * patch19: default arg for shift was wrong after first subroutine definition - * patch19: op/regexp.t failed from missing arg to bcmp() - * - * Revision 4.0.1.5 91/11/05 18:03:32 lwall - * patch11: random cleanup - * patch11: $0 was being truncated at times - * patch11: cppstdin now installed outside of source directory - * patch11: -P didn't allow use of #elif or #undef - * patch11: prepared for ctype implementations that don't define isascii() - * patch11: added eval {} - * patch11: eval confused by string containing null - * - * 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. - * - */ - -/*SUPPRESS 560*/ - -#include "EXTERN.h" -#include "perl.h" -#include "perly.h" -#include "patchlevel.h" - -char *getenv(); - -#ifdef IAMSUID -#ifndef DOSUID -#define DOSUID -#endif -#endif - -#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW -#ifdef DOSUID -#undef DOSUID -#endif -#endif - -static char* moreswitches(); -static void incpush(); -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; - -main(argc,argv,env) -register int argc; -register char **argv; -register char **env; -{ - register STR *str; - register char *s; - char *scriptname; - char *getenv(); - bool dosearch = FALSE; -#ifdef DOSUID - char *validarg = ""; -#endif - -#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW -#ifdef IAMSUID -#undef IAMSUID - fatal("suidperl is no longer needed since the kernel can now execute\n\ -setuid perl scripts securely.\n"); -#endif -#endif - - origargv = argv; - origargc = argc; - 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 - if (do_undump) { - origfilename = savestr(argv[0]); - do_undump = 0; - loop_ptr = -1; /* start label stack again */ - goto just_doit; - } -#ifdef TAINT -#ifndef DOSUID - if (uid == euid && gid == egid) - taintanyway == TRUE; /* running taintperl explicitly */ -#endif -#endif - (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; - 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 'a': - case 'c': - case 'd': - case 'D': - case 'i': - case 'l': - case 'n': - case 'p': - case 'u': - case 'U': - case 'v': - case 'w': - if (s = moreswitches(s)) - goto reswitch; - break; - - case 'e': -#ifdef TAINT - if (euid != uid || egid != gid) - fatal("No -e allowed in setuid scripts"); -#endif - if (!e_fp) { - e_tmpname = savestr(TMPPATH); - (void)mktemp(e_tmpname); - if (!*e_tmpname) - fatal("Can't mktemp()"); - e_fp = fopen(e_tmpname,"w"); - if (!e_fp) - fatal("Cannot open temporary file"); - } - if (argv[1]) { - fputs(argv[1],e_fp); - argc--,argv++; - } - (void)putc('\n', e_fp); - 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," "); - if (*++s) { - (void)apush(stab_array(incstab),str_make(s,0)); - } - else if (argv[1]) { - (void)apush(stab_array(incstab),str_make(argv[1],0)); - str_cat(str,argv[1]); - argc--,argv++; - str_cat(str," "); - } - break; - case 'P': -#ifdef TAINT - if (euid != uid || egid != gid) - fatal("No -P allowed in setuid scripts"); -#endif - 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': -#ifdef TAINT - if (euid != uid || egid != gid) - fatal("No -S allowed in setuid scripts"); -#endif - dosearch = TRUE; - s++; - goto reswitch; - case 'x': - doextract = TRUE; - s++; - if (*s) - cddir = savestr(s); - break; - case '-': - argc--,argv++; - goto switch_end; - case 0: - break; - default: - fatal("Unrecognized switch: -%s",s); - } - } - switch_end: - scriptname = argv[0]; - if (e_fp) { - if (fflush(e_fp) || ferror(e_fp) || fclose(e_fp)) - fatal("Can't write to temp file for -e: %s", strerror(errno)); - argc++,argv--; - scriptname = e_tmpname; - } - -#ifdef DOSISH -#define PERLLIB_SEP ';' -#else -#define PERLLIB_SEP ':' -#endif -#ifndef TAINT /* Can't allow arbitrary PERLLIB in setuid script */ - incpush(getenv("PERLLIB")); -#endif /* TAINT */ - -#ifndef PRIVLIB -#define PRIVLIB "/usr/local/lib/perl" -#endif - incpush(PRIVLIB); - (void)apush(stab_array(incstab),str_make(".",1)); - - str_set(&str_no,No); - str_set(&str_yes,Yes); - - /* open script */ - - if (scriptname == Nullch) -#ifdef MSDOS - { - if ( isatty(fileno(stdin)) ) - moreswitches("v"); - scriptname = "-"; - } -#else - scriptname = "-"; -#endif - if (dosearch && !index(scriptname, '/') && (s = getenv("PATH"))) { - char *xfound = Nullch, *xfailed = Nullch; - int len; - - bufend = s + strlen(s); - while (*s) { -#ifndef DOSISH - s = cpytill(tokenbuf,s,bufend,':',&len); -#else -#ifdef atarist - for (len = 0; *s && *s != ',' && *s != ';'; tokenbuf[len++] = *s++); - tokenbuf[len] = '\0'; -#else - for (len = 0; *s && *s != ';'; tokenbuf[len++] = *s++); - tokenbuf[len] = '\0'; -#endif -#endif - if (*s) - s++; -#ifndef DOSISH - if (len && tokenbuf[len-1] != '/') -#else -#ifdef atarist - if (len && ((tokenbuf[len-1] != '\\') && (tokenbuf[len-1] != '/'))) -#else - if (len && tokenbuf[len-1] != '\\') -#endif -#endif - (void)strcat(tokenbuf+len,"/"); - (void)strcat(tokenbuf+len,scriptname); -#ifdef DEBUGGING - if (debug & 1) - fprintf(stderr,"Looking for %s\n",tokenbuf); -#endif - if (stat(tokenbuf,&statbuf) < 0) /* not there? */ - continue; - if (S_ISREG(statbuf.st_mode) - && cando(S_IRUSR,TRUE,&statbuf) && cando(S_IXUSR,TRUE,&statbuf)) { - xfound = tokenbuf; /* bingo! */ - break; - } - if (!xfailed) - xfailed = savestr(tokenbuf); - } - if (!xfound) - fatal("Can't execute %s", xfailed ? xfailed : scriptname ); - if (xfailed) - Safefree(xfailed); - scriptname = savestr(xfound); - } - - fdpid = anew(Nullstab); /* for remembering popen pids by fd */ - pidstatus = hnew(COEFFSIZE);/* for remembering status of dead pids */ - - origfilename = savestr(scriptname); - curcmd->c_filestab = fstab(origfilename); - if (strEQ(origfilename,"-")) - scriptname = ""; - if (preprocess) { - char *cpp = CPPSTDIN; - - if (strEQ(cpp,"cppstdin")) - sprintf(tokenbuf, "%s/%s", SCRIPTDIR, cpp); - else - sprintf(tokenbuf, "%s", cpp); - str_cat(str,"-I"); - str_cat(str,PRIVLIB); -#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, str_get(str), CPPMINUS); -#ifdef DEBUGGING - if (debug & 64) { - fputs(buf,stderr); - fputs("\n",stderr); - } -#endif - 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(-1, uid); -#else - setuid(uid); -#endif -#endif - if (geteuid() != uid) - fatal("Can't do seteuid!\n"); - } -#endif /* IAMSUID */ - rsfp = mypopen(buf,"r"); - } - else if (!*scriptname) { -#ifdef TAINT - if (euid != uid || egid != gid) - fatal("Can't take set-id script from stdin"); -#endif - rsfp = stdin; - } - else - rsfp = fopen(scriptname,"r"); - if ((FILE*)rsfp == Nullfp) { -#ifdef DOSUID -#ifndef IAMSUID /* in case script is not readable before setuid */ - if (euid && stat(stab_val(curcmd->c_filestab)->str_ptr,&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"); - } -#endif -#endif - fatal("Can't open perl script \"%s\": %s\n", - stab_val(curcmd->c_filestab)->str_ptr, strerror(errno)); - } - str_free(str); /* free -I directories */ - str = Nullstr; - - /* 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. - * - * 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; - -#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(stab_val(curcmd->c_filestab)->str_ptr,1)) /*double check*/ - fatal("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 (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 (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, -"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, - statbuf.st_uid, statbuf.st_gid); - (void)mypclose(rsfp); - } - fatal("Permission denied\n"); - } - if (setreuid(uid,euid) < 0 || getuid() != uid || geteuid() != euid) - fatal("Can't reswap uid and euid"); - if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */ - fatal("Permission denied\n"); - } -#endif /* HAS_SETREUID */ -#endif /* IAMSUID */ - - if (!S_ISREG(statbuf.st_mode)) - fatal("Permission denied"); - if (statbuf.st_mode & S_IWOTH) - fatal("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; - 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 (*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])) - fatal("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\ -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); -#ifndef IAMSUID - (void)sprintf(buf, "%s/sperl%s", BIN, patchlevel); - execv(buf, origargv); /* try again */ -#endif - fatal("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((GIDTYPE)-1,statbuf.st_gid); -#else - setgid(statbuf.st_gid); -#endif -#endif - if (getegid() != statbuf.st_gid) - fatal("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); -#else - setuid(statbuf.st_uid); -#endif -#endif - if (geteuid() != statbuf.st_uid) - fatal("Can't do seteuid!\n"); - } - else if (uid) { /* oops, mustn't run as root */ -#ifdef HAS_SETEUID - (void)seteuid((UIDTYPE)uid); -#else -#ifdef HAS_SETREUID - (void)setreuid((UIDTYPE)-1,(UIDTYPE)uid); -#else - setuid((UIDTYPE)uid); -#endif -#endif - if (geteuid() != uid) - fatal("Can't do seteuid!\n"); - } - uid = (int)getuid(); - euid = (int)geteuid(); - gid = (int)getgid(); - egid = (int)getegid(); - if (!cando(S_IXUSR,TRUE,&statbuf)) - fatal("Permission denied\n"); /* they can't do this */ - } -#ifdef IAMSUID - else if (preprocess) - fatal("-P not allowed for setuid/setgid script\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 */ -#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 */ - 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\ -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) - - /* skip forward in input to the real script? */ - - 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 */ - doextract = FALSE; - if (s = instr(s,"perl -")) { - s += 6; - /*SUPPRESS 530*/ - while (s = moreswitches(s)) ; - } - if (cddir && chdir(cddir) < 0) - fatal("Can't chdir to %s",cddir); - } - } -#endif /* !defined(IAMSUID) && !defined(TAINT) */ - - defstab = stabent("_",TRUE); - - subname = str_make("main",4); - 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; - 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 */ - - bufend = bufptr = str_get(linestr); - - 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); - - /* now parse the script */ - - 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); - } - } - - New(50,loop_stack,128,struct loop); -#ifdef DEBUGGING - if (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); - } - - /* initialize everything that won't change if we undump */ - - if (sigstab = stabent("SIG",allstabs)) { - sigstab->str_pok |= SP_MULTI; - (void)hadd(sigstab); - } - - magicalize("!#?^~=-%.+&*()<>,\\/[|`':\004\t\020\024\027\006"); - userinit(); /* in case linked C routines want magical variables */ - - amperstab = stabent("&",allstabs); - leftstab = stabent("`",allstabs); - rightstab = stabent("'",allstabs); - sawampersand = (amperstab || leftstab || rightstab); - if (tmpstab = stabent(":",allstabs)) - str_set(stab_val(tmpstab),chopset); - if (tmpstab = stabent("\024",allstabs)) - time(&basetime); - - /* these aren't necessarily magical */ - if (tmpstab = stabent("\014",allstabs)) { - str_set(stab_val(tmpstab),"\f"); - formfeed = stab_val(tmpstab); - } - 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; - if (!stab_io(stdinstab)) - 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; - if (!stab_io(tmpstab)) - 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; - if (!stab_io(curoutstab)) - 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 */ - - /* now that script is parsed, we can modify record separator */ - - rs = nrs; - rslen = nrslen; - rschar = nrschar; - rspara = (nrslen == 2); - str_nset(stab_val(stabent("/", TRUE)), rs, rslen); - - if (do_undump) - my_unexec(); - - 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] == '-') { - argc--,argv++; - break; - } - if (s = index(argv[0], '=')) { - *s++ = '\0'; - str_set(stab_val(stabent(argv[0]+1,TRUE)),s); - } - else - str_numset(stab_val(stabent(argv[0]+1,TRUE)),(double)1.0); - } - } -#ifdef TAINT - tainted = 1; -#endif - if (tmpstab = stabent("0",allstabs)) { - str_set(stab_val(tmpstab),origfilename); - magicname("0", Nullch, 0); - } - 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)); - for (; argc > 0; argc--,argv++) { - (void)apush(stab_array(argvstab),str_make(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) - environ[0] = Nullch; - for (; *env; env++) { - if (!(s = index(*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); - *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"); -#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); - } -} - -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 */ - /* (void)apush(stab_array(incstab), str_make(".", 1)); */ - p++; - } - if ( (s = index(p, PERLLIB_SEP)) != Nullch ) { - (void)apush(stab_array(incstab), str_make(p, (int)(s - p))); - p = s + 1; - } else { - (void)apush(stab_array(incstab), str_make(p, 0)); - break; - } - } -} - -void -savelines(array, str) -ARRAY *array; -STR *str; -{ - 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++; - 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,savecmd,gimme,arglast) -STR *str; -int optype; -HASH *stash; -int savecmd; -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 long last_elen = 0; - 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;\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 (*tmpfilename == '/' || - (*tmpfilename == '.' && - (tmpfilename[1] == '/' || - (tmpfilename[1] == '.' && tmpfilename[2] == '/')))) - { - 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 && last_elen == bufend - bufptr - && *bufptr == *last_eval && !bcmp(bufptr,last_eval,last_elen)){ - retval = 0; - eval_root = last_root; /* no point in reparsing */ - } - else if (in_eval == 1 && !savecmd) { - if (last_root) { - Safefree(last_eval); - last_eval = Nullch; - cmd_free(last_root); - } - last_root = Nullcmd; - last_elen = bufend - bufptr; - last_eval = nsavestr(bufptr, last_elen); - retval = yyparse(); - retval |= error_count; - if (!retval) - last_root = eval_root; - if (!last_root) { - Safefree(last_eval); - last_eval = Nullch; - } - } - else - retval = yyparse(); - } - myroot = eval_root; /* in case cmd_exec does another eval! */ - - if (retval || error_count) { - 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 - /*SUPPRESS 29*/ /*SUPPRESS 30*/ - if ((CMD*)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 (savecmd) - eval_root = myroot; - else if (in_eval != 1 && myroot != last_root) - cmd_free(myroot); - } - - 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 : "" ); - } -#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; -} - -int -do_try(cmd,gimme,arglast) -CMD *cmd; -int gimme; -int *arglast; -{ - STR **st = stack->ary_array; - - CMD * VOLATILE oldcurcmd = curcmd; - VOLATILE int oldtmps_base = tmps_base; - VOLATILE int oldsave = savestack->ary_fill; - SPAT * VOLATILE oldspat = curspat; - SPAT * VOLATILE oldlspat = lastspat; - VOLATILE int sp = arglast[0]; - - tmps_base = tmps_max; - str_set(stab_val(stabent("@",TRUE)),""); - in_eval++; - 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 - if (setjmp(loop_stack[loop_ptr].loop_env)) { - st = stack->ary_array; - sp = arglast[0]; - if (gimme != G_ARRAY) - st[++sp] = &str_undef; - } - else { - sp = cmd_exec(cmd,gimme,sp); - st = stack->ary_array; -/* for (i = arglast[0] + 1; i <= sp; i++) - st[i] = str_mortal(st[i]); not needed, I think */ - /* if we don't save result, free zaps it */ - } - - 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 : "" ); - } -#endif - loop_ptr--; - tmps_base = oldtmps_base; - curspat = oldspat; - lastspat = oldlspat; - curcmd = oldcurcmd; - if (savestack->ary_fill > oldsave) /* let them use local() */ - restorelist(oldsave); - - return sp; -} - -/* This routine handles any switches that can be given during run */ - -static char * -moreswitches(s) -char *s; -{ - int numlen; - - 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"); -#endif - /*SUPPRESS 530*/ - for (s++; isDIGIT(*s); s++) ; - return s; - case 'i': - inplace = savestr(s+1); - /*SUPPRESS 530*/ - 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"); -#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, 1991, Raymond Chen, Kai Uwe Rommel\n", - stdout); -#endif -#endif -#ifdef atarist - fputs("atariST series port, ++jrb bammi@cadence.com\n", stdout); -#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]); -#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; -} - -/* compliments of Tom Christiansen */ - -/* unexec() can be found in the Gnu emacs distribution */ - -void -my_unexec() -{ -#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); -#else -#ifdef DOSISH - 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 */ -#endif -} - |