Embed luaposix and bitlib into Lua core library

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12696 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 1458 insertions, 0 deletions

diff --git a/package/lua/patches/400-luaposix_5.1.4-embedded.patch b/package/lua/patches/400-luaposix_5.1.4-embedded.patch
new file mode 100644
index 0000000000..73d8eb03ba
--- /dev/null
+++ b/package/lua/patches/400-luaposix_5.1.4-embedded.patch
@@ -0,0 +1,1458 @@
+Index: lua-5.1.4/src/Makefile
+===================================================================
+--- lua-5.1.4.orig/src/Makefile	2008-09-25 12:19:44.000000000 +0200
++++ lua-5.1.4/src/Makefile	2008-09-25 12:20:03.000000000 +0200
+@@ -12,7 +12,7 @@
+ AR= ar rcu
+ RANLIB= ranlib
+ RM= rm -f
+-LIBS= -lm $(MYLIBS)
++LIBS= -lm -lcrypt $(MYLIBS)
+ 
+ MYCFLAGS=
+ MYLDFLAGS=
+@@ -29,7 +29,7 @@
+ 	lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.o ltm.o  \
+ 	lundump.o lvm.o lzio.o lnum.o
+ LIB_O=	lauxlib.o lbaselib.o ldblib.o liolib.o lmathlib.o loslib.o ltablib.o \
+-	lstrlib.o loadlib.o linit.o
++	lstrlib.o loadlib.o linit.o lposix.o
+ 
+ LUA_T=	lua
+ LUA_O=	lua.o
+Index: lua-5.1.4/src/linit.c
+===================================================================
+--- lua-5.1.4.orig/src/linit.c	2008-09-25 12:19:02.000000000 +0200
++++ lua-5.1.4/src/linit.c	2008-09-25 12:19:32.000000000 +0200
+@@ -23,6 +23,7 @@
+   {LUA_STRLIBNAME, luaopen_string},
+   {LUA_MATHLIBNAME, luaopen_math},
+   {LUA_DBLIBNAME, luaopen_debug},
++  {LUA_POSIXLIBNAME, luaopen_posix},
+   {NULL, NULL}
+ };
+ 
+Index: lua-5.1.4/src/lposix.c
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ lua-5.1.4/src/lposix.c	2008-09-25 12:16:29.000000000 +0200
+@@ -0,0 +1,1139 @@
++/*
++* lposix.c
++* POSIX library for Lua 5.1.
++* Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br>
++* 07 Apr 2006 23:17:49
++* Clean up and bug fixes by Leo Razoumov <slonik.az@gmail.com> 2006-10-11 <!LR> 
++* Based on original by Claudio Terra for Lua 3.x.
++* With contributions by Roberto Ierusalimschy.
++*/
++
++#include <sys/stat.h>
++#include <sys/times.h>
++#include <sys/types.h>
++#include <sys/utsname.h>
++#include <sys/wait.h>
++
++#include <dirent.h>
++#include <errno.h>
++#include <fcntl.h>
++#include <glob.h>
++#include <grp.h>
++#include <libgen.h>
++#include <limits.h>
++#include <poll.h>
++#include <pwd.h>
++#include <signal.h>
++#include <stdio.h>
++#include <stdlib.h>
++#include <string.h>
++#include <syslog.h>
++#include <time.h>
++#include <unistd.h>
++#include <utime.h>
++
++#define MYNAME		"posix"
++#define MYVERSION	MYNAME " library for " LUA_VERSION " / Jan 2008"
++
++#ifndef ENABLE_SYSLOG
++#define ENABLE_SYSLOG 	1
++#endif
++
++#include "lua.h"
++#include "lualib.h"
++#include "lauxlib.h"
++
++#include "modemuncher.c"
++
++/* compatibility with Lua 5.0 */
++#ifndef LUA_VERSION_NUM
++static int luaL_checkoption (lua_State *L, int narg, const char *def,
++                                 const char *const lst[]) {
++  const char *name = (def) ? luaL_optstring(L, narg, def) :
++                             luaL_checkstring(L, narg);
++  int i = luaL_findstring(name, lst);
++  if (i == -1)
++	luaL_argerror(L, narg, lua_pushfstring(L, "invalid option '%s'", name));
++  return i;
++}
++#define lua_pushinteger			lua_pushnumber
++#define lua_createtable(L,a,r)		lua_newtable(L)
++#define LUA_FILEHANDLE			"FILE*"
++
++#define lua_setfield(l,i,k)
++#define lua_getfield(l,i,k)
++
++#endif
++
++static const struct { char c; mode_t b; } M[] =
++{
++	{'r', S_IRUSR}, {'w', S_IWUSR}, {'x', S_IXUSR},
++	{'r', S_IRGRP}, {'w', S_IWGRP}, {'x', S_IXGRP},
++	{'r', S_IROTH}, {'w', S_IWOTH}, {'x', S_IXOTH},
++};
++
++
++static void pushmode(lua_State *L, mode_t mode)
++{
++	char m[9];
++	int i;
++	for (i=0; i<9; i++) m[i]= (mode & M[i].b) ? M[i].c : '-';
++	if (mode & S_ISUID) m[2]= (mode & S_IXUSR) ? 's' : 'S';
++	if (mode & S_ISGID) m[5]= (mode & S_IXGRP) ? 's' : 'S';
++	lua_pushlstring(L, m, 9);
++}
++
++typedef void (*Selector)(lua_State *L, int i, const void *data);
++
++static int doselection(lua_State *L, int i, int n, 
++                       const char *const S[], 
++                       Selector F, 
++                       const void *data)
++{
++	if (lua_isnone(L, i) || lua_istable(L, i))
++	{
++		int j;
++		if (lua_isnone(L, i)) lua_createtable(L,0,n); else lua_settop(L, i);
++		for (j=0; S[j]!=NULL; j++)
++		{
++			lua_pushstring(L, S[j]);
++			F(L, j, data);
++			lua_settable(L, -3);
++		}
++		return 1;
++	}
++	else
++	{
++		int k,n=lua_gettop(L);
++		for (k=i; k<=n; k++)
++		{
++			int j=luaL_checkoption(L, k, NULL, S);
++			F(L, j, data);
++			lua_replace(L, k);
++		}
++		return n-i+1;
++	}
++}
++#define doselection(L,i,S,F,d) (doselection)(L,i,sizeof(S)/sizeof(*S)-1,S,F,d)
++
++static int pusherror(lua_State *L, const char *info)
++{
++	lua_pushnil(L);
++	if (info==NULL)
++		lua_pushstring(L, strerror(errno));
++	else
++		lua_pushfstring(L, "%s: %s", info, strerror(errno));
++	lua_pushinteger(L, errno);
++	return 3;
++}
++
++static int pushresult(lua_State *L, int i, const char *info)
++{
++	if (i==-1) return pusherror(L, info);
++	lua_pushinteger(L, i);
++		return 1;
++}
++
++static void badoption(lua_State *L, int i, const char *what, int option)
++{
++	luaL_argerror(L, 2,
++		lua_pushfstring(L, "unknown %s option '%c'", what, option));
++}
++
++static uid_t mygetuid(lua_State *L, int i)
++{
++	if (lua_isnone(L, i))
++		return -1;
++	else if (lua_isnumber(L, i))
++		return (uid_t) lua_tonumber(L, i);
++	else if (lua_isstring(L, i))
++	{
++		struct passwd *p=getpwnam(lua_tostring(L, i));
++		return (p==NULL) ? -1 : p->pw_uid;
++	}
++	else
++		return luaL_typerror(L, i, "string or number");
++}
++
++static gid_t mygetgid(lua_State *L, int i)
++{
++	if (lua_isnone(L, i))
++		return -1;
++	else if (lua_isnumber(L, i))
++		return (gid_t) lua_tonumber(L, i);
++	else if (lua_isstring(L, i))
++	{
++		struct group *g=getgrnam(lua_tostring(L, i));
++		return (g==NULL) ? -1 : g->gr_gid;
++	}
++	else
++		return luaL_typerror(L, i, "string or number");
++}
++
++
++static int Perrno(lua_State *L)			/** errno([n]) */
++{
++	int n = luaL_optint(L, 1, errno);
++	lua_pushstring(L, strerror(n));
++	lua_pushinteger(L, n);
++	return 2;
++}
++
++
++static int Pbasename(lua_State *L)		/** basename(path) */
++{
++	char b[PATH_MAX];
++	size_t len;
++	const char *path = luaL_checklstring(L, 1, &len);
++	if (len>=sizeof(b)) luaL_argerror(L, 1, "too long");
++	lua_pushstring(L, basename(strcpy(b,path)));
++	return 1;
++}
++
++
++static int Pdirname(lua_State *L)		/** dirname(path) */
++{
++	char b[PATH_MAX];
++	size_t len;
++	const char *path = luaL_checklstring(L, 1, &len);
++	if (len>=sizeof(b)) luaL_argerror(L, 1, "too long");
++	lua_pushstring(L, dirname(strcpy(b,path)));
++	return 1;
++}
++
++
++static int Pdir(lua_State *L)			/** dir([path]) */
++{
++	const char *path = luaL_optstring(L, 1, ".");
++	DIR *d = opendir(path);
++	if (d == NULL)
++		return pusherror(L, path);
++	else
++	{
++		int i;
++		struct dirent *entry;
++		lua_newtable(L);
++		for (i=1; (entry = readdir(d)) != NULL; i++)
++		{
++			lua_pushstring(L, entry->d_name);
++			lua_rawseti(L, -2, i);
++		}
++		closedir(d);
++		lua_pushinteger(L, i-1);
++		return 2;
++	}
++}
++
++static int Pglob(lua_State *L)                  /** glob(pattern) */
++{
++ const char *pattern = luaL_optstring(L, 1, "*");
++ glob_t globres;
++
++ if (glob(pattern, 0, NULL, &globres))
++   return pusherror(L, pattern);
++ else
++   {
++     int i;
++     lua_newtable(L);
++     for (i=1; i<=globres.gl_pathc; i++) {
++       lua_pushstring(L, globres.gl_pathv[i-1]);
++       lua_rawseti(L, -2, i);
++     }
++     globfree(&globres);
++     return 1;
++   }
++}
++
++static int aux_files(lua_State *L)
++{
++	DIR **p = (DIR **)lua_touserdata(L, lua_upvalueindex(1));
++	DIR *d = *p;
++	struct dirent *entry;
++	if (d == NULL) return 0;
++	entry = readdir(d);
++	if (entry == NULL)
++	{
++		closedir(d);
++		*p=NULL;
++		return 0;
++	}
++	else
++	{
++		lua_pushstring(L, entry->d_name);
++	return 1;
++	}
++}
++
++static int dir_gc (lua_State *L)
++{
++	DIR *d = *(DIR **)lua_touserdata(L, 1);
++	if (d!=NULL) closedir(d);
++	return 0;
++}
++
++static int Pfiles(lua_State *L)			/** files([path]) */
++{
++	const char *path = luaL_optstring(L, 1, ".");
++	DIR **d = (DIR **)lua_newuserdata(L, sizeof(DIR *));
++	if (luaL_newmetatable(L, MYNAME " dir handle"))
++	{
++		lua_pushliteral(L, "__gc");
++		lua_pushcfunction(L, dir_gc);
++		lua_settable(L, -3);
++	}
++	lua_setmetatable(L, -2);
++	*d = opendir(path);
++	if (*d == NULL) return pusherror(L, path);
++		lua_pushcclosure(L, aux_files, 1);
++		return 1;
++}
++
++
++static int Pgetcwd(lua_State *L)		/** getcwd() */
++{
++	char b[PATH_MAX];
++	if (getcwd(b, sizeof(b)) == NULL) return pusherror(L, ".");
++	lua_pushstring(L, b);
++		return 1;
++}
++
++
++static int Pmkdir(lua_State *L)			/** mkdir(path) */
++{
++	const char *path = luaL_checkstring(L, 1);
++	return pushresult(L, mkdir(path, 0777), path);
++}
++
++
++static int Pchdir(lua_State *L)			/** chdir(path) */
++{
++	const char *path = luaL_checkstring(L, 1);
++	return pushresult(L, chdir(path), path);
++}
++
++static int Prmdir(lua_State *L)			/** rmdir(path) */
++{
++	const char *path = luaL_checkstring(L, 1);
++	return pushresult(L, rmdir(path), path);
++}
++
++
++static int Punlink(lua_State *L)		/** unlink(path) */
++{
++	const char *path = luaL_checkstring(L, 1);
++	return pushresult(L, unlink(path), path);
++}
++
++static int Plink(lua_State *L)			/** link(old,new,[symbolic]) */
++{
++	const char *oldpath = luaL_checkstring(L, 1);
++	const char *newpath = luaL_checkstring(L, 2);
++	return pushresult(L,
++		(lua_toboolean(L,3) ? symlink : link)(oldpath, newpath), NULL);
++}
++
++
++static int Preadlink(lua_State *L)		/** readlink(path) */
++{
++	char b[PATH_MAX];
++	const char *path = luaL_checkstring(L, 1);
++	int n = readlink(path, b, sizeof(b));
++	if (n==-1) return pusherror(L, path);
++	lua_pushlstring(L, b, n);
++	return 1;
++}
++
++
++static int Paccess(lua_State *L)		/** access(path,[mode]) */
++{
++	int mode=F_OK;
++	const char *path=luaL_checkstring(L, 1);
++	const char *s;
++	for (s=luaL_optstring(L, 2, "f"); *s!=0 ; s++)
++		switch (*s)
++		{
++			case ' ': break;
++			case 'r': mode |= R_OK; break;
++			case 'w': mode |= W_OK; break;
++			case 'x': mode |= X_OK; break;
++			case 'f': mode |= F_OK; break;
++			default: badoption(L, 2, "mode", *s); break;
++		}
++	return pushresult(L, access(path, mode), path);
++}
++
++
++static int myfclose (lua_State *L) {
++  FILE **p = (FILE **)lua_touserdata(L, 1);
++  int rc = fclose(*p);
++  if (rc == 0) *p = NULL;
++  return pushresult(L, rc, NULL);
++} 
++
++static int pushfile (lua_State *L, int id, const char *mode) {
++  FILE **f = (FILE **)lua_newuserdata(L, sizeof(FILE *));
++  *f = NULL;
++  luaL_getmetatable(L, LUA_FILEHANDLE);
++  lua_setmetatable(L, -2);
++  lua_getfield(L, LUA_REGISTRYINDEX, "POSIX_PIPEFILE");
++  if (lua_isnil(L, -1)) {
++    lua_pop(L, 1);
++    lua_newtable(L);
++    lua_pushvalue(L, -1);
++    lua_pushcfunction(L, myfclose);
++    lua_setfield(L, -2, "__close");
++    lua_setfield(L, LUA_REGISTRYINDEX, "POSIX_PIPEFILE");
++  }
++  lua_setfenv(L, -2);
++  *f = fdopen(id, mode);
++  return (*f != NULL);
++}
++
++static int Ppipe(lua_State *L)			/** pipe() */
++{
++	int fd[2];
++	if (pipe(fd)==-1) return pusherror(L, NULL);
++	if (!pushfile(L, fd[0], "r") || !pushfile(L, fd[1], "w"))
++		return pusherror(L, "pipe");
++	return 2;
++}
++
++
++static int Pfileno(lua_State *L)	/** fileno(filehandle) */
++{
++	FILE *f = *(FILE**) luaL_checkudata(L, 1, LUA_FILEHANDLE);
++	return pushresult(L, fileno(f), NULL);
++}
++
++
++static int Pfdopen(lua_State *L)	/** fdopen(fd, mode) */
++{
++	int fd = luaL_checkint(L, 1);
++	const char *mode = luaL_checkstring(L, 2);
++	if (!pushfile(L, fd, mode))
++		return pusherror(L, "fdpoen");
++	return 1;
++}
++
++
++/* helper func for Pdup */
++static const char *filemode(int fd)
++{
++	const char *m;
++	int mode = fcntl(fd, F_GETFL);
++	if (mode < 0)
++		return NULL;
++	switch (mode & O_ACCMODE) {
++		case O_RDONLY:  m = "r"; break;
++		case O_WRONLY:  m = "w"; break;
++		default:    	m = "rw"; break;
++	}
++	return m;
++}
++
++static int Pdup(lua_State *L)			/** dup(old,[new]) */
++{
++	FILE **oldf = (FILE**)luaL_checkudata(L, 1, LUA_FILEHANDLE);
++  	FILE **newf = (FILE **)lua_touserdata(L, 2);
++	int fd;
++	const char *msg = "dup2";
++	fflush(*newf);
++	if (newf == NULL) {
++		fd = dup(fileno(*oldf));
++		msg = "dup";
++	} else {
++		fflush(*newf);
++		fd = dup2(fileno(*oldf), fileno(*newf));
++	}
++
++	if ((fd < 0) || !pushfile(L, fd, filemode(fd)))
++		return pusherror(L, msg);
++	return 1;
++}
++
++
++static int Pmkfifo(lua_State *L)		/** mkfifo(path) */
++{
++	const char *path = luaL_checkstring(L, 1);
++	return pushresult(L, mkfifo(path, 0777), path);
++}
++
++
++static int runexec(lua_State *L, int use_shell)
++{
++	const char *path = luaL_checkstring(L, 1);
++	int i,n=lua_gettop(L);
++	char **argv = lua_newuserdata(L,(n+1)*sizeof(char*));
++	argv[0] = (char*)path;
++	for (i=1; i<n; i++) argv[i] = (char*)luaL_checkstring(L, i+1);
++	argv[n] = NULL;
++	if (use_shell) {
++		execvp(path, argv);
++	} else {
++		execv(path, argv);
++	}
++	return pusherror(L, path);
++}
++
++
++static int Pexec(lua_State *L)			/** exec(path,[args]) */
++{
++	return runexec(L, 0);
++}
++
++
++static int Pexecp(lua_State *L)			/** execp(path,[args]) */
++{
++	return runexec(L, 1);
++}
++
++
++static int Pfork(lua_State *L)			/** fork() */
++{
++	return pushresult(L, fork(), NULL);
++}
++
++/* from http://lua-users.org/lists/lua-l/2007-11/msg00346.html */
++static int Ppoll(lua_State *L)   /** poll(filehandle, timeout) */
++{
++	struct pollfd fds;
++	FILE* file = *(FILE**)luaL_checkudata(L,1,LUA_FILEHANDLE);
++	int timeout = luaL_checkint(L,2);
++	fds.fd = fileno(file);
++	fds.events = POLLIN;
++	return pushresult(L, poll(&fds,1,timeout), NULL);
++}
++
++static int Pwait(lua_State *L)			/** wait([pid]) */
++{
++	int status;
++	pid_t pid = luaL_optint(L, 1, -1);
++	pid = waitpid(pid, &status, 0);
++	if (pid == -1) return pusherror(L, NULL);
++	lua_pushinteger(L, pid);
++	if (WIFEXITED(status))
++	{
++		lua_pushliteral(L,"exited");
++		lua_pushinteger(L, WEXITSTATUS(status));
++		return 3;
++	}
++	else if (WIFSIGNALED(status))
++	{
++		lua_pushliteral(L,"killed");
++		lua_pushinteger(L, WTERMSIG(status));
++		return 3;
++	}
++	else if (WIFSTOPPED(status))
++	{
++		lua_pushliteral(L,"stopped");
++		lua_pushinteger(L, WSTOPSIG(status));
++		return 3;
++	}
++	return 1;
++}
++
++
++static int Pkill(lua_State *L)			/** kill(pid,[sig]) */
++{
++	pid_t pid = luaL_checkint(L, 1);
++	int sig = luaL_optint(L, 2, SIGTERM);
++	return pushresult(L, kill(pid, sig), NULL);
++}
++
++static int Psetpid(lua_State *L)		/** setpid(option,...) */
++{
++	const char *what=luaL_checkstring(L, 1);
++	switch (*what)
++	{
++		case 'U':
++			return pushresult(L, seteuid(mygetuid(L, 2)), NULL);
++		case 'u':
++			return pushresult(L, setuid(mygetuid(L, 2)), NULL);
++		case 'G':
++			return pushresult(L, setegid(mygetgid(L, 2)), NULL);
++		case 'g':
++			return pushresult(L, setgid(mygetgid(L, 2)), NULL);
++		case 's':
++			return pushresult(L, setsid(), NULL);
++		case 'p':
++		{
++			pid_t pid  = luaL_checkint(L, 2);
++			pid_t pgid = luaL_checkint(L, 3);
++			return pushresult(L, setpgid(pid,pgid), NULL);
++		}
++		default:
++			badoption(L, 2, "id", *what);
++			return 0;
++	}
++}
++
++
++static int Psleep(lua_State *L)			/** sleep(seconds) */
++{
++	unsigned int seconds = luaL_checkint(L, 1);
++	lua_pushinteger(L, sleep(seconds));
++	return 1;
++}
++
++
++static int Psetenv(lua_State *L)		/** setenv(name,value,[over]) */
++{
++	const char *name=luaL_checkstring(L, 1);
++	const char *value=luaL_optstring(L, 2, NULL);
++	if (value==NULL)
++	{
++	unsetenv(name);
++		return pushresult(L, 0, NULL);
++	}
++	else
++	{
++		int overwrite=lua_isnoneornil(L, 3) || lua_toboolean(L, 3);
++		return pushresult(L, setenv(name,value,overwrite), NULL);
++	}
++}
++
++
++static int Pgetenv(lua_State *L)		/** getenv([name]) */
++{
++	if (lua_isnone(L, 1))
++	{
++		extern char **environ;
++		char **e;
++		lua_newtable(L);
++		for (e=environ; *e!=NULL; e++)
++		{
++			char *s=*e;
++			char *eq=strchr(s, '=');
++			if (eq==NULL)		/* will this ever happen? */
++			{
++				lua_pushstring(L,s);
++				lua_pushboolean(L,1);
++			}
++			else
++			{
++				lua_pushlstring(L,s,eq-s);
++				lua_pushstring(L,eq+1);
++			}
++			lua_settable(L,-3);
++		}
++	}
++	else
++		lua_pushstring(L, getenv(luaL_checkstring(L, 1)));
++	return 1;
++}
++
++static int Pumask(lua_State *L)			/** umask([mode]) */
++{/* <!LR> from old lposix-5.0 version */
++	char m[10];
++	mode_t mode;
++	umask(mode=umask(0));
++	mode=(~mode)&0777;
++	if (!lua_isnone(L, 1))
++	{
++		if (mode_munch(&mode, luaL_checkstring(L, 1)))
++		{
++			lua_pushnil(L);
++			return 1;
++		}
++		mode&=0777;
++		umask(~mode);
++	}
++	modechopper(mode, m);
++	lua_pushstring(L, m);
++	return 1;
++}
++
++
++static int Pchmod(lua_State *L)			/** chmod(path,mode) */
++{
++	mode_t mode;
++	struct stat s;
++	const char *path = luaL_checkstring(L, 1);
++	const char *modestr = luaL_checkstring(L, 2);
++	if (stat(path, &s)) return pusherror(L, path);
++	mode = s.st_mode;
++	if (mode_munch(&mode, modestr)) luaL_argerror(L, 2, "bad mode");
++	return pushresult(L, chmod(path, mode), path);
++}
++
++
++static int Pchown(lua_State *L)			/** chown(path,uid,gid) */
++{
++	const char *path = luaL_checkstring(L, 1);
++	uid_t uid = mygetuid(L, 2);
++	gid_t gid = mygetgid(L, 3);
++	return pushresult(L, chown(path, uid, gid), path);
++}
++
++
++static int Putime(lua_State *L)			/** utime(path,[mtime,atime]) */
++{
++	struct utimbuf times;
++	time_t currtime = time(NULL);
++	const char *path = luaL_checkstring(L, 1);
++	times.modtime = luaL_optnumber(L, 2, currtime);
++	times.actime  = luaL_optnumber(L, 3, currtime);
++	return pushresult(L, utime(path, &times), path);
++}
++
++
++static void FgetID(lua_State *L, int i, const void *data)
++{
++	switch (i)
++	{
++		case 0:	lua_pushinteger(L, getegid());	break;
++		case 1:	lua_pushinteger(L, geteuid());	break;
++		case 2:	lua_pushinteger(L, getgid());	break;
++		case 3:	lua_pushinteger(L, getuid());	break;
++		case 4:	lua_pushinteger(L, getpgrp());	break;
++		case 5:	lua_pushinteger(L, getpid());	break;
++		case 6:	lua_pushinteger(L, getppid());	break;
++	}
++}
++
++static const char *const SgetID[] =
++{
++	"egid", "euid", "gid", "uid", "pgrp", "pid", "ppid", NULL
++};
++
++static int Pgetpid(lua_State *L)		/** getpid([options]) */
++{
++	return doselection(L, 1, SgetID, FgetID, NULL);
++}
++
++
++static int Phostid(lua_State *L)		/** hostid() */
++{
++	char b[32];
++	sprintf(b,"%ld",gethostid());
++	lua_pushstring(L, b);
++	return 1;
++}
++
++
++static int Pttyname(lua_State *L)		/** ttyname([fd]) */
++{
++	int fd=luaL_optint(L, 1, 0);
++	lua_pushstring(L, ttyname(fd));
++	return 1;
++}
++
++
++static int Pctermid(lua_State *L)		/** ctermid() */
++{
++	char b[L_ctermid];
++	lua_pushstring(L, ctermid(b));
++	return 1;
++}
++
++
++static int Pgetlogin(lua_State *L)		/** getlogin() */
++{
++	lua_pushstring(L, getlogin());
++	return 1;
++}
++
++
++static void Fgetpasswd(lua_State *L, int i, const void *data)
++{
++	const struct passwd *p=data;
++	switch (i)
++	{
++		case 0: lua_pushstring(L, p->pw_name); break;
++		case 1: lua_pushinteger(L, p->pw_uid); break;
++		case 2: lua_pushinteger(L, p->pw_gid); break;
++		case 3: lua_pushstring(L, p->pw_dir); break;
++		case 4: lua_pushstring(L, p->pw_shell); break;
++/* not strictly POSIX */
++		case 5: lua_pushstring(L, p->pw_gecos); break;
++		case 6: lua_pushstring(L, p->pw_passwd); break;
++	}
++}
++
++static const char *const Sgetpasswd[] =
++{
++	"name", "uid", "gid", "dir", "shell", "gecos", "passwd", NULL
++};
++
++
++static int Pgetpasswd(lua_State *L)		/** getpasswd(name|id,[sel]) */
++{
++	struct passwd *p=NULL;
++	if (lua_isnoneornil(L, 1))
++		p = getpwuid(geteuid());
++	else if (lua_isnumber(L, 1))
++		p = getpwuid((uid_t)lua_tonumber(L, 1));
++	else if (lua_isstring(L, 1))
++		p = getpwnam(lua_tostring(L, 1));
++	else
++		luaL_typerror(L, 1, "string or number");
++	if (p==NULL)
++		lua_pushnil(L);
++	else
++		return doselection(L, 2, Sgetpasswd, Fgetpasswd, p);
++	return 1;
++}
++
++
++static int Pgetgroup(lua_State *L)		/** getgroup(name|id) */
++{
++	struct group *g=NULL;
++	if (lua_isnumber(L, 1))
++		g = getgrgid((gid_t)lua_tonumber(L, 1));
++	else if (lua_isstring(L, 1))
++		g = getgrnam(lua_tostring(L, 1));
++	else
++		luaL_typerror(L, 1, "string or number");
++	if (g==NULL)
++		lua_pushnil(L);
++	else
++	{
++		int i;
++		lua_newtable(L);
++		lua_pushliteral(L, "name");
++		lua_pushstring(L, g->gr_name);
++		lua_settable(L, -3);
++		lua_pushliteral(L, "gid");
++		lua_pushinteger(L, g->gr_gid);
++		lua_settable(L, -3);
++		for (i=0; g->gr_mem[i]!=NULL; i++)
++		{
++			lua_pushstring(L, g->gr_mem[i]);
++			lua_rawseti(L, -2, i);
++		}
++	}
++	return 1;
++}
++
++
++struct mytimes
++{
++ struct tms t;
++ clock_t elapsed;
++};
++
++/* #define pushtime(L,x)	lua_pushnumber(L,((lua_Number)x)/CLOCKS_PER_SEC) */
++#define pushtime(L,x)	lua_pushnumber(L, ((lua_Number)x)/clk_tck)
++
++static void Ftimes(lua_State *L, int i, const void *data)
++{
++    static long clk_tck = 0; 
++	const struct mytimes *t=data;
++
++    if( !clk_tck){ clk_tck= sysconf(_SC_CLK_TCK);}
++	switch (i)
++	{
++		case 0: pushtime(L, t->t.tms_utime); break;
++		case 1: pushtime(L, t->t.tms_stime); break;
++		case 2: pushtime(L, t->t.tms_cutime); break;
++		case 3: pushtime(L, t->t.tms_cstime); break;
++		case 4: pushtime(L, t->elapsed); break;
++	}
++}
++
++static const char *const Stimes[] =
++{
++	"utime", "stime", "cutime", "cstime", "elapsed", NULL
++};
++
++static int Ptimes(lua_State *L)			/** times([options]) */
++{
++	struct mytimes t;
++	t.elapsed = times(&t.t);
++	return doselection(L, 1, Stimes, Ftimes, &t);
++}
++
++
++static const char *filetype(mode_t m)
++{
++	if (S_ISREG(m))		return "regular";
++	else if (S_ISLNK(m))	return "link";
++	else if (S_ISDIR(m))	return "directory";
++	else if (S_ISCHR(m))	return "character device";
++	else if (S_ISBLK(m))	return "block device";
++	else if (S_ISFIFO(m))	return "fifo";
++	else if (S_ISSOCK(m))	return "socket";
++	else			return "?";
++}
++
++static void Fstat(lua_State *L, int i, const void *data)
++{
++	const struct stat *s=data;
++	switch (i)
++	{
++		case 0: pushmode(L, s->st_mode); break;
++		case 1: lua_pushinteger(L, s->st_ino); break;
++		case 2: lua_pushinteger(L, s->st_dev); break;
++		case 3: lua_pushinteger(L, s->st_nlink); break;
++		case 4: lua_pushinteger(L, s->st_uid); break;
++		case 5: lua_pushinteger(L, s->st_gid); break;
++		case 6: lua_pushinteger(L, s->st_size); break;
++		case 7: lua_pushinteger(L, s->st_atime); break;
++		case 8: lua_pushinteger(L, s->st_mtime); break;
++		case 9: lua_pushinteger(L, s->st_ctime); break;
++		case 10:lua_pushstring(L, filetype(s->st_mode)); break;
++	}
++}
++
++static const char *const Sstat[] =
++{
++	"mode", "ino", "dev", "nlink", "uid", "gid",
++	"size", "atime", "mtime", "ctime", "type",
++	NULL
++};
++
++static int Pstat(lua_State *L)			/** stat(path,[options]) */
++{
++	struct stat s;
++	const char *path=luaL_checkstring(L, 1);
++	if (lstat(path,&s)==-1) return pusherror(L, path);
++	return doselection(L, 2, Sstat, Fstat, &s);
++}
++
++
++static int Puname(lua_State *L)			/** uname([string]) */
++{
++	struct utsname u;
++	luaL_Buffer b;
++	const char *s;
++	if (uname(&u)==-1) return pusherror(L, NULL);
++	luaL_buffinit(L, &b);
++	for (s=luaL_optstring(L, 1, "%s %n %r %v %m"); *s; s++)
++		if (*s!='%')
++			luaL_putchar(&b, *s);
++		else switch (*++s)
++		{
++			case '%': luaL_putchar(&b, *s); break;
++			case 'm': luaL_addstring(&b,u.machine); break;
++			case 'n': luaL_addstring(&b,u.nodename); break;
++			case 'r': luaL_addstring(&b,u.release); break;
++			case 's': luaL_addstring(&b,u.sysname); break;
++			case 'v': luaL_addstring(&b,u.version); break;
++			default: badoption(L, 2, "format", *s); break;
++		}
++	luaL_pushresult(&b);
++	return 1;
++}
++
++
++static const int Kpathconf[] =
++{
++	_PC_LINK_MAX, _PC_MAX_CANON, _PC_MAX_INPUT, _PC_NAME_MAX, _PC_PATH_MAX,
++	_PC_PIPE_BUF, _PC_CHOWN_RESTRICTED, _PC_NO_TRUNC, _PC_VDISABLE,
++	-1
++};
++
++static void Fpathconf(lua_State *L, int i, const void *data)
++{
++	const char *path=data;
++	lua_pushinteger(L, pathconf(path, Kpathconf[i]));
++}
++
++static const char *const Spathconf[] =
++{
++	"link_max", "max_canon", "max_input", "name_max", "path_max",
++	"pipe_buf", "chown_restricted", "no_trunc", "vdisable",
++	NULL
++};
++
++static int Ppathconf(lua_State *L)		/** pathconf([path,options]) */
++{
++	const char *path = luaL_optstring(L, 1, ".");
++	return doselection(L, 2, Spathconf, Fpathconf, path);
++}
++
++
++static const int Ksysconf[] =
++{
++	_SC_ARG_MAX, _SC_CHILD_MAX, _SC_CLK_TCK, _SC_NGROUPS_MAX, _SC_STREAM_MAX,
++	_SC_TZNAME_MAX, _SC_OPEN_MAX, _SC_JOB_CONTROL, _SC_SAVED_IDS, _SC_VERSION,
++	-1
++};
++
++static void Fsysconf(lua_State *L, int i, const void *data)
++{
++	lua_pushinteger(L, sysconf(Ksysconf[i]));
++}
++
++static const char *const Ssysconf[] =
++{
++	"arg_max", "child_max", "clk_tck", "ngroups_max", "stream_max",
++	"tzname_max", "open_max", "job_control", "saved_ids", "version",
++	NULL
++};
++
++static int Psysconf(lua_State *L)		/** sysconf([options]) */
++{
++	return doselection(L, 1, Ssysconf, Fsysconf, NULL);
++}
++
++#if ENABLE_SYSLOG
++/* syslog funcs */
++static int Popenlog(lua_State *L)	/** openlog(ident, [option], [facility]) */
++{
++	const char *ident = luaL_checkstring(L, 1);
++	int option = 0;
++	int facility = luaL_optint(L, 3, LOG_USER);
++	const char *s = luaL_optstring(L, 2, "");
++	while (*s) {
++		switch (*s) {
++			case ' ': break;
++			case 'c': option |= LOG_CONS; break;
++			case 'n': option |= LOG_NDELAY; break;
++			case 'e': option |= LOG_PERROR; break;
++			case 'p': option |= LOG_PID; break;
++			default: badoption(L, 2, "option", *s); break;
++		}
++		s++;
++	}
++	openlog(ident, option, facility);
++	return 0;
++}
++
++
++static int Psyslog(lua_State *L)		/** syslog(priority, message) */
++{
++	int priority = luaL_checkint(L, 1);
++	const char *msg = luaL_checkstring(L, 2);
++	syslog(priority, "%s", msg);
++	return 0;
++}
++
++
++static int Pcloselog(lua_State *L)		/** closelog() */
++{
++	closelog();
++	return 0;
++}
++#endif
++
++/*
++ * XXX: GNU and BSD handle the forward declaration of crypt() in different
++ * and annoying ways (especially GNU). Declare it here just to make sure
++ * that it's there
++ */
++char *crypt(const char *, const char *);
++
++static int Pcrypt(lua_State *L)
++{
++	const char *str, *salt;
++	char *res;
++
++	str = luaL_checkstring(L, 1);
++	salt = luaL_checkstring(L, 2);
++	if (strlen(salt) < 2)
++		luaL_error(L, "not enough salt");
++
++	res = crypt(str, salt);
++	lua_pushstring(L, res);
++
++	return 1;
++}
++
++static const luaL_reg R[] =
++{
++	{"access",		Paccess},
++	{"basename",		Pbasename},
++	{"chdir",		Pchdir},
++	{"chmod",		Pchmod},
++	{"chown",		Pchown},
++	{"crypt",		Pcrypt},
++	{"ctermid",		Pctermid},
++	{"dirname",		Pdirname},
++	{"dir",			Pdir},
++	{"dup",			Pdup},
++	{"errno",		Perrno},
++	{"exec",		Pexec},
++	{"execp",		Pexecp},
++	{"fdopen",		Pfdopen},
++	{"fileno",		Pfileno},
++	{"files",		Pfiles},
++	{"fork",		Pfork},
++	{"getcwd",		Pgetcwd},
++	{"getenv",		Pgetenv},
++	{"getgroup",		Pgetgroup},
++	{"getlogin",		Pgetlogin},
++	{"getpasswd",		Pgetpasswd},
++	{"getpid",		Pgetpid},
++	{"glob",		Pglob},
++	{"hostid",		Phostid},
++	{"kill",		Pkill},
++	{"link",		Plink},
++	{"mkdir",		Pmkdir},
++	{"mkfifo",		Pmkfifo},
++	{"pathconf",		Ppathconf},
++	{"pipe",		Ppipe},
++	{"readlink",		Preadlink},
++	{"rmdir",		Prmdir},
++	{"rpoll",		Ppoll},
++	{"setenv",		Psetenv},
++	{"setpid",		Psetpid},
++	{"sleep",		Psleep},
++	{"stat",		Pstat},
++	{"sysconf",		Psysconf},
++	{"times",		Ptimes},
++	{"ttyname",		Pttyname},
++	{"unlink",		Punlink},
++	{"umask",		Pumask},
++	{"uname",		Puname},
++	{"utime",		Putime},
++	{"wait",		Pwait},
++
++#if ENABLE_SYSLOG
++	{"openlog",		Popenlog},
++	{"syslog",		Psyslog},
++	{"closelog",		Pcloselog},
++#endif
++
++	{NULL,			NULL}
++};
++
++#define set_const(key, value)		\
++	lua_pushliteral(L, key);	\
++	lua_pushnumber(L, value);	\
++	lua_settable(L, -3)
++
++LUALIB_API int luaopen_posix (lua_State *L)
++{
++	luaL_register(L,MYNAME,R);
++	lua_pushliteral(L,"version");		/** version */
++	lua_pushliteral(L,MYVERSION);
++	lua_settable(L,-3);
++
++#if ENABLE_SYSLOG
++	set_const("LOG_AUTH", LOG_AUTH);
++	set_const("LOG_AUTHPRIV", LOG_AUTHPRIV);
++	set_const("LOG_CRON", LOG_CRON);
++	set_const("LOG_DAEMON", LOG_DAEMON);
++	set_const("LOG_FTP", LOG_FTP);
++	set_const("LOG_KERN", LOG_KERN);
++	set_const("LOG_LOCAL0", LOG_LOCAL0);
++	set_const("LOG_LOCAL1", LOG_LOCAL1);
++	set_const("LOG_LOCAL2", LOG_LOCAL2);
++	set_const("LOG_LOCAL3", LOG_LOCAL3);
++	set_const("LOG_LOCAL4", LOG_LOCAL4);
++	set_const("LOG_LOCAL5", LOG_LOCAL5);
++	set_const("LOG_LOCAL6", LOG_LOCAL6);
++	set_const("LOG_LOCAL7", LOG_LOCAL7);
++	set_const("LOG_LPR", LOG_LPR);
++	set_const("LOG_MAIL", LOG_MAIL);
++	set_const("LOG_NEWS", LOG_NEWS);
++	set_const("LOG_SYSLOG", LOG_SYSLOG);
++	set_const("LOG_USER", LOG_USER);
++	set_const("LOG_UUCP", LOG_UUCP);
++
++	set_const("LOG_EMERG", LOG_EMERG);
++	set_const("LOG_ALERT", LOG_ALERT);
++	set_const("LOG_CRIT", LOG_CRIT);
++	set_const("LOG_ERR", LOG_ERR);
++	set_const("LOG_WARNING", LOG_WARNING);
++	set_const("LOG_NOTICE", LOG_NOTICE);
++	set_const("LOG_INFO", LOG_INFO);
++	set_const("LOG_DEBUG", LOG_DEBUG);
++#endif
++
++
++	return 1;
++}
++
++/*EOF*/
+Index: lua-5.1.4/src/lualib.h
+===================================================================
+--- lua-5.1.4.orig/src/lualib.h	2008-09-25 12:18:14.000000000 +0200
++++ lua-5.1.4/src/lualib.h	2008-09-25 12:18:53.000000000 +0200
+@@ -39,6 +39,9 @@
+ #define LUA_LOADLIBNAME	"package"
+ LUALIB_API int (luaopen_package) (lua_State *L);
+ 
++#define LUA_POSIXLIBNAME "posix"
++LUALIB_API int (luaopen_posix) (lua_State *L);
++
+ 
+ /* open all previous libraries */
+ LUALIB_API void (luaL_openlibs) (lua_State *L); 
+Index: lua-5.1.4/src/modemuncher.c
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ lua-5.1.4/src/modemuncher.c	2008-09-25 12:16:29.000000000 +0200
+@@ -0,0 +1,261 @@
++/* 
++	Mode Muncher -- modemuncher.c
++	961110 Claudio Terra
++
++	munch vb
++	[ME monchen, perh. influenced by MF mangier to eat --more at MANGER]
++	:to chew with a crunching sound: eat with relish
++	:to chew food with a crunching sound: eat food with relish
++	--munch-er n
++		
++	The NeXT Digital Edition of Webster's Ninth New Collegiate Dictionary
++	and Webster's Collegiate Thesaurus
++*/
++
++/* struct for rwx <-> POSIX constant lookup tables */
++struct modeLookup
++{
++	char rwx;
++	mode_t bits;
++};
++
++typedef struct modeLookup modeLookup;
++
++static modeLookup modesel[] =
++{
++	/* RWX char				Posix Constant */
++	{'r',					S_IRUSR},
++	{'w',					S_IWUSR},
++	{'x',					S_IXUSR},
++	
++	{'r',					S_IRGRP},
++	{'w',					S_IWGRP},
++	{'x',					S_IXGRP},
++	
++	{'r',					S_IROTH},
++	{'w',					S_IWOTH},
++	{'x',					S_IXOTH},
++	{0, 					(mode_t)-1} /* do not delete this line */
++};
++
++
++
++static int rwxrwxrwx(mode_t *mode, const char *p)
++{
++	int count;
++	mode_t tmp_mode = *mode;
++	
++	tmp_mode &= ~(S_ISUID | S_ISGID); /* turn off suid and sgid flags */
++	for (count=0; count<9; count ++)
++	{
++		if (*p == modesel[count].rwx) tmp_mode |= modesel[count].bits;	/* set a bit */
++		else if (*p == '-') tmp_mode &= ~modesel[count].bits;			/* clear a bit */
++		else if (*p=='s') switch(count)
++		{
++			case 2: /* turn on suid flag */
++			tmp_mode |= S_ISUID | S_IXUSR;
++			break;
++			
++			case 5: /* turn on sgid flag */
++			tmp_mode |= S_ISGID | S_IXGRP;
++			break;
++
++			default:
++			return -4; /* failed! -- bad rwxrwxrwx mode change */
++			break;
++		}
++		p++;
++	}
++	*mode = tmp_mode;
++	return 0;
++}
++
++static void modechopper(mode_t mode, char *p)
++{
++	/* requires char p[10] */
++	int count;
++	char *pp;
++	
++	pp=p;
++	
++	for (count=0; count<9; count ++)
++	{
++		if (mode & modesel[count].bits) *p = modesel[count].rwx;
++		else *p='-';
++		
++		p++;
++	}
++	*p=0; /* to finish the string */
++	
++	/* dealing with suid and sgid flags */
++	if (mode & S_ISUID) pp[2] = (mode & S_IXUSR) ? 's' : 'S';
++	if (mode & S_ISGID) pp[5] = (mode & S_IXGRP) ? 's' : 'S';
++
++}
++
++static int mode_munch(mode_t *mode, const char* p)
++{
++
++	char op=0;
++	mode_t affected_bits, ch_mode;
++	int doneFlag = 0;
++#ifdef DEBUG
++char tmp[10];
++#endif
++
++#ifdef DEBUG
++modechopper(*mode, tmp);
++printf("modemuncher: got base mode = %s\n", tmp);
++#endif
++
++	while (!doneFlag)
++	{
++		/* step 0 -- clear temporary variables */
++		affected_bits=0;
++		ch_mode=0;
++		
++		/* step 1 -- who's affected? */
++
++#ifdef DEBUG
++printf("modemuncher step 1\n");
++#endif
++		
++		/* mode string given in rwxrwxrwx format */
++		if (*p== 'r' || *p == '-') return rwxrwxrwx(mode, p);
++		
++		/* mode string given in ugoa+-=rwx format */
++		for ( ; ; p++)
++			switch (*p)
++			{
++				case 'u':
++				affected_bits |= 04700;
++				break;
++				
++				case 'g':
++				affected_bits |= 02070;
++				break;
++				
++				case 'o':
++				affected_bits |= 01007;
++				break;
++				
++				case 'a':
++				affected_bits |= 07777;
++				break;
++				
++				/* ignore spaces */
++				case ' ':
++				break;
++				
++				
++				default:
++				goto no_more_affected;
++			}
++
++		no_more_affected:
++		/* If none specified, affect all bits. */
++		if (affected_bits == 0) affected_bits = 07777;
++
++		/* step 2 -- how is it changed? */
++		
++#ifdef DEBUG
++printf("modemuncher step 2 (*p='%c')\n", *p);
++#endif
++
++		switch (*p)
++		{
++			case '+':
++			case '-':
++			case '=':
++			op = *p;
++			break;
++			
++			/* ignore spaces */
++			case ' ':
++			break;
++			
++			default:
++			return -1; /* failed! -- bad operator */
++		}
++		
++		
++		/* step 3 -- what are the changes? */
++		
++#ifdef DEBUG
++printf("modemuncher step 3\n");
++#endif
++
++		for (p++ ; *p!=0 ; p++)
++			switch (*p)
++			{
++				case 'r':
++				ch_mode |= 00444;
++				break;
++				
++				case 'w':
++				ch_mode |= 00222;
++				break;
++				
++				case 'x':
++				ch_mode |= 00111;
++				break;
++				
++				case 's':
++				/* Set the setuid/gid bits if `u' or `g' is selected. */
++				ch_mode |= 06000;
++				break;
++			
++				/* ignore spaces */
++				case ' ':
++				break;
++				
++				default:
++				goto specs_done;
++			}
++
++		specs_done:
++		/* step 4 -- apply the changes */
++
++#ifdef DEBUG
++		printf("modemuncher step 4\n");
++#endif
++		if (*p != ',') doneFlag = 1;
++		if (*p != 0 && *p != ' ' && *p != ',')
++		{
++		
++#ifdef DEBUG
++printf("modemuncher: comma error!\n");
++printf("modemuncher: doneflag = %u\n", doneFlag);
++#endif
++			return -2; /* failed! -- bad mode change */
++		
++		}
++		p++;
++		/*if (!ch_mode) return -2;*/ /* failed! -- bad mode change */
++		if (ch_mode) switch (op)
++		{
++			case '+':
++			*mode = *mode |= ch_mode & affected_bits;
++			break;
++
++			case '-':
++			*mode = *mode &= ~(ch_mode & affected_bits);
++			break;
++
++			case '=':
++			*mode = ch_mode & affected_bits;
++			break;
++		
++			default:
++			return -3; /* failed! -- unknown error */
++		}
++	}
++#ifdef DEBUG
++modechopper(*mode, tmp);
++printf("modemuncher: returning mode = %s\n", tmp);
++#endif
++
++	return 0; /* successful call */
++}
++
++