Start phasing out internal copy of Lua

- don't build internal copy of Lua
- move 3rd party extensions (posix and rexlib) to toplevel luaext/
  directory, built by default (unless --without-lua specified)
- auto*foo checks for external Lua
- minimal tweaks to lposix.c and rpmlua.c to get them build with Lua 5.1

1 files changed, 819 insertions, 0 deletions

diff --git a/luaext/lposix.c b/luaext/lposix.c
new file mode 100644
index 000000000..7f3051449
--- /dev/null
+++ b/luaext/lposix.c
@@ -0,0 +1,819 @@
+/*
+* lposix.c
+* POSIX library for Lua 5.0. Based on original by Claudio Terra for Lua 3.x.
+* Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br>
+* 05 Nov 2003 22:09:10
+*/
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/times.h>
+#include <sys/types.h>
+#include <sys/utsname.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+#include <utime.h>
+
+#define MYNAME		"posix"
+#define MYVERSION	MYNAME " library for " LUA_VERSION " / Nov 2003"
+
+#include "lua.h"
+#include "lauxlib.h"
+#include "lposix.h"
+
+
+#ifndef MYBUFSIZ
+#define MYBUFSIZ 512
+#endif
+
+#include "modemuncher.c"
+
+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 "?";
+}
+
+typedef int (*Selector)(lua_State *L, int i, const void *data);
+
+static int doselection(lua_State *L, int i, const char *const S[], Selector F, const void *data)
+{
+	if (lua_isnone(L, i))
+	{
+		lua_newtable(L);
+		for (i=0; S[i]!=NULL; i++)
+		{
+			lua_pushstring(L, S[i]);
+			F(L, i, data);
+			lua_settable(L, -3);
+		}
+		return 1;
+	}
+	else
+	{
+		int j=luaL_checkoption(L, i, NULL, S);
+		if (j==-1) luaL_argerror(L, i, "unknown selector");
+		return F(L, j, data);
+	}
+}
+
+static void storeindex(lua_State *L, int i, const char *value)
+{
+	lua_pushstring(L, value);
+	lua_rawseti(L, -2, i);
+}
+
+static void storestring(lua_State *L, const char *name, const char *value)
+{
+	lua_pushstring(L, name);
+	lua_pushstring(L, value);
+	lua_settable(L, -3);
+}
+
+static void storenumber(lua_State *L, const char *name, lua_Number value)
+{
+	lua_pushstring(L, name);
+	lua_pushnumber(L, value);
+	lua_settable(L, -3);
+}
+
+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_pushnumber(L, errno);
+	return 3;
+}
+
+static int pushresult(lua_State *L, int i, const char *info)
+{
+	if (i != -1)
+	{
+		lua_pushnumber(L, i);
+		return 1;
+	}
+	else
+		return pusherror(L, info);
+}
+
+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() */
+{
+	lua_pushstring(L, strerror(errno));
+	lua_pushnumber(L, errno);
+	return 2;
+}
+
+
+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++)
+			storeindex(L, i, entry->d_name);
+		closedir(d);
+		return 1;
+	}
+}
+
+
+static int aux_files(lua_State *L)
+{
+	DIR *d = lua_touserdata(L, lua_upvalueindex(1));
+	struct dirent *entry;
+	if (d == NULL) luaL_error(L, "attempt to use closed dir");
+	entry = readdir(d);
+	if (entry == NULL)
+	{
+		closedir(d);
+		lua_pushnil(L);
+		lua_replace(L, lua_upvalueindex(1));
+		lua_pushnil(L);
+	}
+	else
+	{
+		lua_pushstring(L, entry->d_name);
+#if 0
+#ifdef _DIRENT_HAVE_D_TYPE
+		lua_pushstring(L, filetype(DTTOIF(entry->d_type)));
+		return 2;
+#endif
+#endif
+	}
+	return 1;
+}
+
+static int Pfiles(lua_State *L)			/** files([path]) */
+{
+	const char *path = luaL_optstring(L, 1, ".");
+	DIR *d = opendir(path);
+	if (d == NULL)
+		return pusherror(L, path);
+	else
+	{
+		lua_pushlightuserdata(L, d);
+		lua_pushcclosure(L, aux_files, 1);
+		return 1;
+	}
+}
+
+
+static int Pgetcwd(lua_State *L)		/** getcwd() */
+{
+	char buf[MYBUFSIZ];
+	if (getcwd(buf, sizeof(buf)) == NULL)
+		return pusherror(L, ".");
+	else
+	{
+		lua_pushstring(L, buf);
+		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(oldpath,newpath) */
+{
+	const char *oldpath = luaL_checkstring(L, 1);
+	const char *newpath = luaL_checkstring(L, 2);
+	return pushresult(L, link(oldpath, newpath), NULL);
+}
+
+
+static int Psymlink(lua_State *L)		/** symlink(oldpath,newpath) */
+{
+	const char *oldpath = luaL_checkstring(L, 1);
+	const char *newpath = luaL_checkstring(L, 2);
+	return pushresult(L, symlink(oldpath, newpath), NULL);
+}
+
+
+static int Preadlink(lua_State *L)		/** readlink(path) */
+{
+	char buf[MYBUFSIZ];
+	const char *path = luaL_checkstring(L, 1);
+	int n = readlink(path, buf, sizeof(buf));
+	if (n==-1) return pusherror(L, path);
+	lua_pushlstring(L, buf, 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 Pmkfifo(lua_State *L)		/** mkfifo(path) */
+{
+	const char *path = luaL_checkstring(L, 1);
+	return pushresult(L, mkfifo(path, 0777), path);
+}
+
+
+static int Pexec(lua_State *L)			/** exec(path,[args]) */
+{
+	const char *path = luaL_checkstring(L, 1);
+	int i,n=lua_gettop(L);
+	char **argv = malloc((n+1)*sizeof(char*));
+	if (argv==NULL) luaL_error(L,"not enough memory");
+	argv[0] = (char*)path;
+	for (i=1; i<n; i++) argv[i] = (char*)luaL_checkstring(L, i+1);
+	argv[i] = NULL;
+	execvp(path,argv);
+	return pusherror(L, path);
+}
+
+
+static int Pfork(lua_State *L)			/** fork() */
+{
+	return pushresult(L, fork(), NULL);
+}
+
+
+static int Pwait(lua_State *L)			/** wait([pid]) */
+{
+	pid_t pid = luaL_optint(L, 1, -1);
+	return pushresult(L, waitpid(pid, NULL, 0), NULL);
+}
+
+
+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 Psleep(lua_State *L)			/** sleep(seconds) */
+{
+	unsigned int seconds = luaL_checkint(L, 1);
+	lua_pushnumber(L, sleep(seconds));
+	return 1;
+}
+
+
+static int Pputenv(lua_State *L)		/** putenv(string) */
+{
+	size_t l;
+	const char *s=luaL_checklstring(L, 1, &l);
+	char *e=malloc(++l);
+	return pushresult(L, (e==NULL) ? -1 : putenv(memcpy(e,s,l)), s);
+}
+
+
+#ifdef linux
+static int Psetenv(lua_State *L)		/** setenv(name,value,[over]) */
+{
+	const char *name=luaL_checkstring(L, 1);
+	const char *value=luaL_checkstring(L, 2);
+	int overwrite=lua_isnoneornil(L, 3) || lua_toboolean(L, 3);
+	return pushresult(L, setenv(name,value,overwrite), name);
+}
+
+
+static int Punsetenv(lua_State *L)		/** unsetenv(name) */
+{
+	const char *name=luaL_checkstring(L, 1);
+	unsetenv(name);
+	return 0;
+}
+#endif
+
+
+static int Pgetenv(lua_State *L)		/** getenv([name]) */
+{
+	if (lua_isnone(L, 1))
+	{
+	#ifdef __APPLE__
+		#include <crt_externs.h>
+		#define environ (*_NSGetEnviron())
+	#else
+		extern char **environ;
+	#endif /* __APPLE__ */
+		char **e;
+		if (*environ==NULL) lua_pushnil(L); else 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,0);
+			}
+			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]) */
+{
+	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 int FgetID(lua_State *L, int i, const void *data)
+{
+	switch (i)
+	{
+		case 0:	lua_pushnumber(L, getegid());	break;
+		case 1:	lua_pushnumber(L, geteuid());	break;
+		case 2:	lua_pushnumber(L, getgid());	break;
+		case 3:	lua_pushnumber(L, getuid());	break;
+		case 4:	lua_pushnumber(L, getpgrp());	break;
+		case 5:	lua_pushnumber(L, getpid());	break;
+		case 6:	lua_pushnumber(L, getppid());	break;
+	}
+	return 1;
+}
+
+static const char *const SgetID[] =
+{
+	"egid", "euid", "gid", "uid", "pgrp", "pid", "ppid", NULL
+};
+
+static int Pgetprocessid(lua_State *L)		/** getprocessid([selector]) */
+{
+	return doselection(L, 1, SgetID, FgetID, NULL);
+}
+
+
+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 int 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_pushnumber(L, p->pw_uid); break;
+		case 2: lua_pushnumber(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;
+	}
+	return 1;
+}
+
+static const char *const Sgetpasswd[] =
+{
+	"name", "uid", "gid", "dir", "shell", "gecos", "passwd", NULL
+};
+
+
+static int Pgetpasswd(lua_State *L)		/** getpasswd(name or id) */
+{
+	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
+		doselection(L, 2, Sgetpasswd, Fgetpasswd, p);
+	return 1;
+}
+
+
+static int Pgetgroup(lua_State *L)		/** getgroup(name or 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);
+		storestring(L, "name", g->gr_name);
+		storenumber(L, "gid", g->gr_gid);
+		for (i=0; g->gr_mem[i] != NULL; i++)
+			storeindex(L, i+1, g->gr_mem[i]);
+	}
+	return 1;
+}
+
+
+static int Psetuid(lua_State *L)		/** setuid(name or id) */
+{
+	return pushresult(L, setuid(mygetuid(L, 1)), NULL);
+}
+
+
+static int Psetgid(lua_State *L)		/** setgid(name or id) */
+{
+	return pushresult(L, setgid(mygetgid(L, 1)), NULL);
+}
+
+struct mytimes
+{
+ struct tms t;
+ clock_t elapsed;
+};
+
+#define pushtime(L,x)		lua_pushnumber(L,((lua_Number)x)/CLOCKS_PER_SEC)
+
+static int Ftimes(lua_State *L, int i, const void *data)
+{
+	const struct mytimes *t=data;
+	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;
+	}
+	return 1;
+}
+
+static const char *const Stimes[] =
+{
+	"utime", "stime", "cutime", "cstime", "elapsed", NULL
+};
+
+#define storetime(L,name,x)	storenumber(L,name,(lua_Number)x/CLOCKS_PER_SEC)
+
+static int Ptimes(lua_State *L)			/** times() */
+{
+	struct mytimes t;
+	t.elapsed = times(&t.t);
+	return doselection(L, 1, Stimes, Ftimes, &t);
+}
+
+
+struct mystat
+{
+	struct stat s;
+	char mode[10];
+	const char *type;
+};
+
+static int Fstat(lua_State *L, int i, const void *data)
+{
+	const struct mystat *s=data;
+	switch (i)
+	{
+		case 0: lua_pushstring(L, s->mode); break;
+		case 1: lua_pushnumber(L, s->s.st_ino); break;
+		case 2: lua_pushnumber(L, s->s.st_dev); break;
+		case 3: lua_pushnumber(L, s->s.st_nlink); break;
+		case 4: lua_pushnumber(L, s->s.st_uid); break;
+		case 5: lua_pushnumber(L, s->s.st_gid); break;
+		case 6: lua_pushnumber(L, s->s.st_size); break;
+		case 7: lua_pushnumber(L, s->s.st_atime); break;
+		case 8: lua_pushnumber(L, s->s.st_mtime); break;
+		case 9: lua_pushnumber(L, s->s.st_ctime); break;
+		case 10:lua_pushstring(L, s->type); break;
+		case 11:lua_pushnumber(L, s->s.st_mode); break;
+	}
+	return 1;
+}
+
+static const char *const Sstat[] =
+{
+	"mode", "ino", "dev", "nlink", "uid", "gid",
+	"size", "atime", "mtime", "ctime", "type", "_mode",
+	NULL
+};
+
+static int Pstat(lua_State *L)			/** stat(path,[selector]) */
+{
+	struct mystat s;
+	const char *path=luaL_checkstring(L, 1);
+	if (lstat(path,&s.s)==-1) return pusherror(L, path);
+	s.type=filetype(s.s.st_mode);
+	modechopper(s.s.st_mode, s.mode);
+	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 int Fpathconf(lua_State *L, int i, const void *data)
+{
+	const char *path=data;
+	lua_pushnumber(L, pathconf(path, Kpathconf[i]));
+	return 1;
+}
+
+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,[selector]) */
+{
+	const char *path=luaL_checkstring(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 int Fsysconf(lua_State *L, int i, const void *data)
+{
+	lua_pushnumber(L, sysconf(Ksysconf[i]));
+	return 1;
+}
+
+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([selector]) */
+{
+	return doselection(L, 1, Ssysconf, Fsysconf, NULL);
+}
+
+
+static const luaL_reg R[] =
+{
+	{"access",		Paccess},
+	{"chdir",		Pchdir},
+	{"chmod",		Pchmod},
+	{"chown",		Pchown},
+	{"ctermid",		Pctermid},
+	{"dir",			Pdir},
+	{"errno",		Perrno},
+	{"exec",		Pexec},
+	{"files",		Pfiles},
+	{"fork",		Pfork},
+	{"getcwd",		Pgetcwd},
+	{"getenv",		Pgetenv},
+	{"getgroup",		Pgetgroup},
+	{"getlogin",		Pgetlogin},
+	{"getpasswd",		Pgetpasswd},
+	{"getprocessid",	Pgetprocessid},
+	{"kill",		Pkill},
+	{"link",		Plink},
+	{"mkdir",		Pmkdir},
+	{"mkfifo",		Pmkfifo},
+	{"pathconf",		Ppathconf},
+	{"putenv",		Pputenv},
+	{"readlink",		Preadlink},
+	{"rmdir",		Prmdir},
+	{"setgid",		Psetgid},
+	{"setuid",		Psetuid},
+	{"sleep",		Psleep},
+	{"stat",		Pstat},
+	{"symlink",		Psymlink},
+	{"sysconf",		Psysconf},
+	{"times",		Ptimes},
+	{"ttyname",		Pttyname},
+	{"umask",		Pumask},
+	{"uname",		Puname},
+	{"unlink",		Punlink},
+	{"utime",		Putime},
+	{"wait",		Pwait},
+
+#ifdef linux
+	{"setenv",		Psetenv},
+	{"unsetenv",		Punsetenv},
+#endif
+	{NULL,			NULL}
+};
+
+LUALIB_API int luaopen_posix (lua_State *L)
+{
+	luaL_openlib(L, MYNAME, R, 0);
+	lua_pushliteral(L,"version");		/** version */
+	lua_pushliteral(L,MYVERSION);
+	lua_settable(L,-3);
+	return 1;
+}