--- /dev/null
+Index: uci.git/lua/uci.c
+===================================================================
+--- uci.git.orig/lua/uci.c 2008-08-26 12:31:34.000000000 +0200
++++ uci.git/lua/uci.c 2008-08-26 21:09:10.000000000 +0200
+@@ -25,6 +25,7 @@
+ #include <uci.h>
+
+ #define MODNAME "uci"
++#define CURSOR_META "uci.cursor.meta"
+ //#define DEBUG 1
+
+ #ifdef DEBUG
+@@ -33,7 +34,6 @@
+ #define DPRINTF(...) do {} while (0)
+ #endif
+
+-static struct uci_context *ctx = NULL;
+ enum autoload {
+ AUTOLOAD_OFF = 0,
+ AUTOLOAD_ON = 1,
+@@ -41,7 +41,7 @@
+ };
+
+ static struct uci_package *
+-find_package(lua_State *L, const char *str, enum autoload al)
++find_package(lua_State *L, struct uci_context *ctx, const char *str, enum autoload al)
+ {
+ struct uci_package *p = NULL;
+ struct uci_element *e;
+@@ -70,17 +70,8 @@
+ uci_load(ctx, name, &p);
+ else if (al) {
+ do {
+- lua_getfield(L, LUA_GLOBALSINDEX, "uci");
+- lua_getfield(L, -1, "autoload");
+- if (!lua_isboolean(L, -1))
+- break;
+-
+- if (!lua_toboolean(L, -1))
+- break;
+-
+ uci_load(ctx, name, &p);
+ } while (0);
+- lua_pop(L, 2);
+ }
+
+ done:
+@@ -89,9 +80,9 @@
+ return p;
+ }
+
+-static void uci_lua_perror(lua_State *L, char *name)
++static void uci_lua_perror(lua_State *L, struct uci_context *ctx, char *name)
+ {
+- lua_getfield(L, LUA_GLOBALSINDEX, "uci");
++ lua_getfield(L, LUA_GLOBALSINDEX, MODNAME);
+ lua_getfield(L, -1, "warn");
+ if (!lua_isboolean(L, -1))
+ goto done;
+@@ -103,33 +94,33 @@
+ }
+
+ static int
+-lookup_args(lua_State *L, struct uci_ptr *ptr, char **buf)
++lookup_args(lua_State *L, struct uci_context *ctx, struct uci_ptr *ptr, char **buf)
+ {
+ char *s = NULL;
+ int n;
+
+ n = lua_gettop(L);
+- luaL_checkstring(L, 1);
+- s = strdup(lua_tostring(L, 1));
++ luaL_checkstring(L, 2);
++ s = strdup(lua_tostring(L, 2));
+ if (!s)
+ goto error;
+
+ memset(ptr, 0, sizeof(struct uci_ptr));
+- if (!find_package(L, s, AUTOLOAD_ON))
++ if (!find_package(L, ctx, s, AUTOLOAD_ON))
+ goto error;
+
+ switch (n) {
++ case 5:
+ case 4:
+- case 3:
+- ptr->option = luaL_checkstring(L, 3);
++ ptr->option = luaL_checkstring(L, 4);
+ /* fall through */
+- case 2:
+- ptr->section = luaL_checkstring(L, 2);
+- ptr->package = luaL_checkstring(L, 1);
++ case 3:
++ ptr->section = luaL_checkstring(L, 3);
++ ptr->package = luaL_checkstring(L, 2);
+ if (uci_lookup_ptr(ctx, ptr, NULL, false) != UCI_OK)
+ goto error;
+ break;
+- case 1:
++ case 2:
+ if (uci_lookup_ptr(ctx, ptr, s, false) != UCI_OK)
+ goto error;
+ break;
+@@ -202,15 +193,70 @@
+ }
+ }
+
++static struct uci_context**
++uci_lua_context(lua_State *L, int index)
++{
++ struct uci_context **u = (struct uci_context **)luaL_checkudata(L, index, CURSOR_META);
++ luaL_argcheck(L, *u, index, "UCI cursor expected");
++ return u;
++}
++
++
++static int
++uci_lua_cursor(lua_State *L)
++{
++ int argc = lua_gettop(L);
++
++ /* create userdata object */
++ struct uci_context **u = (struct uci_context **)lua_newuserdata(L, sizeof(struct uci_context *));
++
++ /* set metatable for userdata */
++ luaL_getmetatable(L, CURSOR_META);
++ lua_setmetatable(L, -2);
++
++ /* initialize context */
++ *u = uci_alloc_context();
++ if (*u == NULL) {
++ luaL_error(L, "Cannot allocate UCI context");
++ }
++
++ if (argc == 2 && lua_isnoneornil(L, 2) == 0) {
++ if (uci_set_savedir(*u, luaL_checkstring(L, 2)) != 0) {
++ luaL_error(L, "Unable to set savedir");
++ }
++ }
++
++ if (argc >= 1 && lua_isnoneornil(L, 1) == 0) {
++ if (uci_set_confdir(*u, luaL_checkstring(L, 1)) != 0) {
++ luaL_error(L, "Unable to set confdir");
++ }
++ }
++
++ return 1;
++}
++
++static int
++uci_lua_gc (lua_State *L) {
++ struct uci_context **u = (struct uci_context **)luaL_checkudata(L, 1, CURSOR_META);
++
++ if (*u) {
++ uci_free_context(*u);
++ *u = NULL;
++ }
++
++ return 0;
++}
++
+ static int
+ uci_lua_unload(lua_State *L)
+ {
++ struct uci_context *ctx = *uci_lua_context(L, 1);
+ struct uci_package *p;
+ const char *s;
+
+- luaL_checkstring(L, 1);
++ luaL_checkstring(L, 2);
+ s = lua_tostring(L, -1);
+- p = find_package(L, s, AUTOLOAD_OFF);
++ p = find_package(L, ctx, s, AUTOLOAD_OFF);
+ if (p) {
+ uci_unload(ctx, p);
+ lua_pushboolean(L, 1);
+@@ -223,6 +269,7 @@
+ static int
+ uci_lua_load(lua_State *L)
+ {
++ struct uci_context *ctx = *uci_lua_context(L, 1);
+ struct uci_package *p = NULL;
+ const char *s;
+
+@@ -231,7 +278,7 @@
+ s = lua_tostring(L, -1);
+
+ if (uci_load(ctx, s, &p)) {
+- uci_lua_perror(L, "uci.load");
++ uci_lua_perror(L, ctx, "uci.load");
+ lua_pushboolean(L, 0);
+ } else {
+ lua_pushboolean(L, 1);
+@@ -244,22 +291,23 @@
+ static int
+ uci_lua_foreach(lua_State *L)
+ {
++ struct uci_context *ctx = *uci_lua_context(L, 1);
+ struct uci_package *p;
+ struct uci_element *e;
+ const char *package, *type;
+ bool ret = false;
+
+- package = luaL_checkstring(L, 1);
++ package = luaL_checkstring(L, 2);
+
+- if (lua_isnil(L, 2))
++ if (lua_isnil(L, 3))
+ type = NULL;
+ else
+- type = luaL_checkstring(L, 2);
++ type = luaL_checkstring(L, 3);
+
+- if (!lua_isfunction(L, 3) || !package)
++ if (!lua_isfunction(L, 4) || !package)
+ luaL_error(L, "Invalid argument");
+
+- p = find_package(L, package, AUTOLOAD_ON);
++ p = find_package(L, ctx, package, AUTOLOAD_ON);
+ if (!p)
+ goto done;
+
+@@ -269,7 +317,7 @@
+ if (type && (strcmp(s->type, type) != 0))
+ continue;
+
+- lua_pushvalue(L, 3); /* iterator function */
++ lua_pushvalue(L, 4); /* iterator function */
+ uci_push_section(L, s);
+ if (lua_pcall(L, 1, 0, 0) == 0)
+ ret = true;
+@@ -283,12 +331,13 @@
+ static int
+ uci_lua_get_any(lua_State *L, bool all)
+ {
++ struct uci_context *ctx = *uci_lua_context(L, 1);
+ struct uci_element *e = NULL;
+ struct uci_ptr ptr;
+ char *s = NULL;
+ int err = UCI_ERR_NOTFOUND;
+
+- if (lookup_args(L, &ptr, &s))
++ if (lookup_args(L, ctx, &ptr, &s))
+ goto error;
+
+ uci_lookup_ptr(ctx, &ptr, NULL, false);
+@@ -323,7 +372,7 @@
+ switch(err) {
+ default:
+ ctx->err = err;
+- uci_lua_perror(L, "uci.get");
++ uci_lua_perror(L, ctx, "uci.get");
+ /* fall through */
+ case UCI_ERR_NOTFOUND:
+ lua_pushnil(L);
+@@ -348,6 +397,7 @@
+ static int
+ uci_lua_add(lua_State *L)
+ {
++ struct uci_context *ctx = *uci_lua_context(L, 1);
+ struct uci_section *s = NULL;
+ struct uci_package *p;
+ const char *package;
+@@ -355,9 +405,9 @@
+ const char *name = NULL;
+
+ do {
+- package = luaL_checkstring(L, 1);
+- type = luaL_checkstring(L, 2);
+- p = find_package(L, package, AUTOLOAD_ON);
++ package = luaL_checkstring(L, 2);
++ type = luaL_checkstring(L, 3);
++ p = find_package(L, ctx, package, AUTOLOAD_ON);
+ if (!p)
+ break;
+
+@@ -374,11 +424,12 @@
+ static int
+ uci_lua_delete(lua_State *L)
+ {
++ struct uci_context *ctx = *uci_lua_context(L, 1);
+ struct uci_ptr ptr;
+ char *s = NULL;
+ int err = UCI_ERR_NOTFOUND;
+
+- if (lookup_args(L, &ptr, &s))
++ if (lookup_args(L, ctx, &ptr, &s))
+ goto error;
+
+ err = uci_delete(ctx, &ptr);
+@@ -387,7 +438,7 @@
+ if (s)
+ free(s);
+ if (err)
+- uci_lua_perror(L, "uci.delete");
++ uci_lua_perror(L, ctx, "uci.delete");
+ lua_pushboolean(L, (err == 0));
+ return 1;
+ }
+@@ -395,6 +446,7 @@
+ static int
+ uci_lua_set(lua_State *L)
+ {
++ struct uci_context *ctx = *uci_lua_context(L, 1);
+ bool istable = false;
+ struct uci_ptr ptr;
+ int err = UCI_ERR_MEM;
+@@ -402,14 +454,14 @@
+ int i, nargs;
+
+ nargs = lua_gettop(L);
+- if (lookup_args(L, &ptr, &s))
++ if (lookup_args(L, ctx, &ptr, &s))
+ goto error;
+
+ switch(nargs) {
+- case 1:
++ case 2:
+ /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
+ break;
+- case 4:
++ case 5:
+ /* Format: uci.set("p", "s", "o", "v") */
+ if (lua_istable(L, nargs)) {
+ if (lua_objlen(L, nargs) < 1)
+@@ -422,7 +474,7 @@
+ ptr.value = luaL_checkstring(L, nargs);
+ }
+ break;
+- case 3:
++ case 4:
+ /* Format: uci.set("p", "s", "v") */
+ ptr.value = ptr.option;
+ ptr.option = NULL;
+@@ -433,17 +485,23 @@
+ }
+
+ err = uci_lookup_ptr(ctx, &ptr, NULL, false);
+- if (err)
++ if (err) {
+ goto error;
++ }
+
+- if ((ptr.s == NULL) || (ptr.value == NULL)) {
++ /* TODO: IMPROVE CHECK
++ * unable to create named section with original check
++ * therefore temporarily added: && (nargs != 4)
++ */
++ if (((ptr.s == NULL) && (nargs != 4)) || (ptr.value == NULL)) {
+ err = UCI_ERR_INVAL;
+ goto error;
+ }
+
+ err = uci_set(ctx, &ptr);
+- if (err)
++ if (err) {
+ goto error;
++ }
+
+ if (istable) {
+ for (i = 2; i <= lua_objlen(L, nargs); i++) {
+@@ -458,7 +516,7 @@
+
+ error:
+ if (err)
+- uci_lua_perror(L, "uci.set");
++ uci_lua_perror(L, ctx, "uci.set");
+ lua_pushboolean(L, (err == 0));
+ return 1;
+ }
+@@ -472,6 +530,7 @@
+ static int
+ uci_lua_package_cmd(lua_State *L, enum pkg_cmd cmd)
+ {
++ struct uci_context *ctx = *uci_lua_context(L, 1);
+ struct uci_element *e, *tmp;
+ struct uci_ptr ptr;
+ char *s = NULL;
+@@ -479,10 +538,10 @@
+ int nargs;
+
+ nargs = lua_gettop(L);
+- if ((cmd != CMD_REVERT) && (nargs > 1))
++ if ((cmd != CMD_REVERT) && (nargs > 2))
+ goto err;
+
+- if (lookup_args(L, &ptr, &s))
++ if (lookup_args(L, ctx, &ptr, &s))
+ goto err;
+
+ uci_lookup_ptr(ctx, &ptr, NULL, false);
+@@ -562,16 +621,16 @@
+ }
+
+ static void
+-uci_lua_changes_pkg(lua_State *L, const char *package)
++uci_lua_changes_pkg(lua_State *L, struct uci_context *ctx, const char *package)
+ {
+ struct uci_package *p = NULL;
+ struct uci_element *e;
+ bool autoload = false;
+
+- p = find_package(L, package, AUTOLOAD_OFF);
++ p = find_package(L, ctx, package, AUTOLOAD_OFF);
+ if (!p) {
+ autoload = true;
+- p = find_package(L, package, AUTOLOAD_FORCE);
++ p = find_package(L, ctx, package, AUTOLOAD_FORCE);
+ if (!p)
+ return;
+ }
+@@ -596,6 +655,7 @@
+ static int
+ uci_lua_changes(lua_State *L)
+ {
++ struct uci_context *ctx = *uci_lua_context(L, 1);
+ const char *package = NULL;
+ char **config = NULL;
+ int nargs;
+@@ -603,9 +663,9 @@
+
+ nargs = lua_gettop(L);
+ switch(nargs) {
++ case 2:
++ package = luaL_checkstring(L, 2);
+ case 1:
+- package = luaL_checkstring(L, 1);
+- case 0:
+ break;
+ default:
+ luaL_error(L, "invalid argument count");
+@@ -613,13 +673,13 @@
+
+ lua_newtable(L);
+ if (package) {
+- uci_lua_changes_pkg(L, package);
++ uci_lua_changes_pkg(L, ctx, package);
+ } else {
+ if (uci_list_configs(ctx, &config) != 0)
+ goto done;
+
+ for(i = 0; config[i] != NULL; i++) {
+- uci_lua_changes_pkg(L, config[i]);
++ uci_lua_changes_pkg(L, ctx, config[i]);
+ }
+ }
+
+@@ -628,29 +688,53 @@
+ }
+
+ static int
++uci_lua_get_confdir(lua_State *L)
++{
++ struct uci_context *ctx = *uci_lua_context(L, 1);
++ lua_pushstring(L, ctx->confdir);
++ return 1;
++}
++
++static int
+ uci_lua_set_confdir(lua_State *L)
+ {
++ struct uci_context *ctx = *uci_lua_context(L, 1);
+ int ret;
+
+- luaL_checkstring(L, 1);
++ luaL_checkstring(L, 2);
+ ret = uci_set_confdir(ctx, lua_tostring(L, -1));
+ lua_pushboolean(L, (ret == 0));
+ return 1;
+ }
+
+ static int
++uci_lua_get_savedir(lua_State *L)
++{
++ struct uci_context *ctx = *uci_lua_context(L, 1);
++ lua_pushstring(L, ctx->savedir);
++ return 1;
++}
++
++static int
+ uci_lua_set_savedir(lua_State *L)
+ {
++ struct uci_context *ctx = *uci_lua_context(L, 1);
+ int ret;
+
+- luaL_checkstring(L, 1);
++ luaL_checkstring(L, 2);
+ ret = uci_set_savedir(ctx, lua_tostring(L, -1));
+ lua_pushboolean(L, (ret == 0));
+
+ return 1;
+ }
+
+-static const luaL_Reg uci[] = {
++static const luaL_Reg uci_module[] = {
++ { "cursor", uci_lua_cursor },
++ { NULL, NULL },
++};
++
++static const luaL_Reg uci_cursor[] = {
++ { "__gc", uci_lua_gc },
+ { "load", uci_lua_load },
+ { "unload", uci_lua_unload },
+ { "get", uci_lua_get },
+@@ -663,25 +747,33 @@
+ { "revert", uci_lua_revert },
+ { "changes", uci_lua_changes },
+ { "foreach", uci_lua_foreach },
++ { "get_confdir", uci_lua_get_confdir },
++ { "get_savedir", uci_lua_get_savedir },
+ { "set_confdir", uci_lua_set_confdir },
+ { "set_savedir", uci_lua_set_savedir },
+ { NULL, NULL },
+ };
+
+-
+ int
+ luaopen_uci(lua_State *L)
+ {
+- ctx = uci_alloc_context();
+- if (!ctx)
+- luaL_error(L, "Cannot allocate UCI context\n");
+- luaL_register(L, MODNAME, uci);
+-
+- /* enable autoload by default */
+- lua_getfield(L, LUA_GLOBALSINDEX, "uci");
+- lua_pushboolean(L, 1);
+- lua_setfield(L, -2, "autoload");
+- lua_pop(L, 1);
++ /* Create metatable */
++ luaL_newmetatable(L, CURSOR_META);
+
+- return 0;
++ /* metatable.__index = metatable */
++ lua_pushstring(L, "__index");
++ lua_pushvalue(L, -2);
++ lua_settable(L, -3);
++
++ /* fill and drop metatable */
++ luaL_register(L, NULL, uci_cursor);
++ lua_pop(L, 1);
++
++ /* register module table */
++ luaL_register(L, MODNAME, uci_module);
++ lua_pushliteral(L, "APIVERSION");
++ lua_pushinteger(L, 2);
++ lua_settable(L, -3);
++
++ return 1;
+ }
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