2 * libuci plugin for Lua
3 * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
15 #include <sys/types.h>
31 #define DPRINTF(...) fprintf(stderr, __VA_ARGS__)
33 #define DPRINTF(...) do {} while (0)
36 static struct uci_context *ctx = NULL;
38 static struct uci_package *
39 find_package(const char *name)
41 struct uci_package *p = NULL;
42 struct uci_element *e;
43 uci_foreach_element(&ctx->root, e) {
44 if (strcmp(e->name, name) != 0)
47 p = uci_to_package(e);
53 static void uci_lua_perror(lua_State *L, char *name)
55 lua_getfield(L, LUA_GLOBALSINDEX, "uci");
56 lua_getfield(L, -1, "warn");
57 if (!lua_isboolean(L, -1))
59 if (lua_toboolean(L, -1) != 1)
61 uci_perror(ctx, name);
66 static void uci_push_section(lua_State *L, struct uci_section *s)
68 struct uci_element *e;
71 lua_pushstring(L, s->type);
72 lua_setfield(L, -2, "type");
73 lua_pushstring(L, s->e.name);
74 lua_setfield(L, -2, "name");
78 lua_setfield(L, -3, "options");
80 uci_foreach_element(&s->options, e) {
81 struct uci_option *o = uci_to_option(e);
82 lua_pushstring(L, o->value);
83 lua_setfield(L, -2, o->e.name);
88 static void uci_push_package(lua_State *L, struct uci_package *p)
90 struct uci_element *e;
94 uci_foreach_element(&p->sections, e) {
97 uci_push_section(L, uci_to_section(e));
98 lua_rawseti(L, -2, i);
103 uci_lua_unload(lua_State *L)
105 struct uci_package *p;
108 luaL_checkstring(L, 1);
109 s = lua_tostring(L, -1);
113 lua_pushboolean(L, 1);
115 lua_pushboolean(L, 0);
121 uci_lua_load(lua_State *L)
123 struct uci_package *p = NULL;
127 lua_pop(L, 1); /* bool ret value of unload */
128 s = lua_tostring(L, -1);
130 if (uci_load(ctx, s, &p)) {
131 uci_lua_perror(L, "uci.load");
132 lua_pushboolean(L, 0);
134 lua_pushboolean(L, 1);
142 uci_lua_foreach(lua_State *L)
144 struct uci_package *p;
145 struct uci_element *e;
146 const char *package, *type;
149 package = luaL_checkstring(L, 1);
154 type = luaL_checkstring(L, 2);
156 if (!lua_isfunction(L, 3) || !package)
157 luaL_error(L, "Invalid argument");
159 p = find_package(package);
163 uci_foreach_element(&p->sections, e) {
164 struct uci_section *s = uci_to_section(e);
166 if (type && (strcmp(s->type, type) != 0))
169 lua_pushvalue(L, 3); /* iterator function */
170 uci_push_section(L, s);
171 if (lua_pcall(L, 1, 0, 0) == 0)
176 lua_pushboolean(L, ret);
181 uci_lua_get_any(lua_State *L, bool all)
183 struct uci_element *e = NULL;
184 struct uci_package *p = NULL;
185 const char *package = NULL;
186 const char *section = NULL;
187 const char *option = NULL;
189 int err = UCI_ERR_MEM;
194 luaL_checkstring(L, 1);
195 s = strdup(lua_tostring(L, 1));
200 package = luaL_checkstring(L, 1);
201 section = luaL_checkstring(L, 2);
203 option = luaL_checkstring(L, 3);
205 if ((err = uci_parse_tuple(ctx, s, (char **) &package, (char **) §ion, (char **) &option, NULL)))
209 if (!all && (section == NULL)) {
214 p = find_package(package);
216 err = UCI_ERR_NOTFOUND;
221 if ((err = uci_lookup(ctx, &e, p, section, option)))
228 case UCI_TYPE_PACKAGE:
229 uci_push_package(L, p);
231 case UCI_TYPE_SECTION:
233 uci_push_section(L, uci_to_section(e));
235 lua_pushstring(L, uci_to_section(e)->type);
237 case UCI_TYPE_OPTION:
238 lua_pushstring(L, uci_to_option(e)->value);
251 uci_lua_perror(L, "uci.get");
253 case UCI_ERR_NOTFOUND:
262 uci_lua_get(lua_State *L)
264 return uci_lua_get_any(L, false);
268 uci_lua_get_all(lua_State *L)
270 return uci_lua_get_any(L, true);
274 uci_lua_add(lua_State *L)
276 struct uci_section *s = NULL;
277 struct uci_package *p;
280 const char *name = NULL;
283 package = luaL_checkstring(L, 1);
284 type = luaL_checkstring(L, 2);
285 p = find_package(package);
289 if (uci_add_section(ctx, p, type, &s) || !s)
295 lua_pushstring(L, name);
300 uci_lua_set(lua_State *L)
302 struct uci_package *p;
303 const char *package = NULL;
304 const char *section = NULL;
305 const char *option = NULL;
306 const char *value = NULL;
308 int err = UCI_ERR_MEM;
311 nargs = lua_gettop(L);
313 s = luaL_checkstring(L, 1);
316 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
321 if ((err = uci_parse_tuple(ctx, (char *) s, (char **) &package, (char **) §ion, (char **) &option, (char **) &value)))
325 /* Format: uci.set("p", "s", "o", "v") */
326 option = luaL_checkstring(L, 3);
329 /* Format: uci.set("p", "s", "v") */
331 section = luaL_checkstring(L, 2);
332 value = luaL_checkstring(L, nargs);
339 if ((section == NULL) || (value == NULL)) {
344 p = find_package(package);
346 err = UCI_ERR_NOTFOUND;
349 err = uci_set(ctx, p, section, option, value, NULL);
353 uci_lua_perror(L, "uci.set");
354 lua_pushboolean(L, (err == 0));
365 uci_lua_package_cmd(lua_State *L, enum pkg_cmd cmd)
367 struct uci_element *e, *tmp;
368 const char *s = NULL;
369 const char *section = NULL;
370 const char *option = NULL;
374 nargs = lua_gettop(L);
377 if (cmd != CMD_REVERT)
379 luaL_checkstring(L, 1);
380 option = lua_tostring(L, -1);
384 if (cmd != CMD_REVERT)
386 luaL_checkstring(L, 1);
387 section = lua_tostring(L, -1);
391 luaL_checkstring(L, 1);
392 s = lua_tostring(L, -1);
399 luaL_error(L, "Invalid argument count");
403 uci_foreach_element_safe(&ctx->root, tmp, e) {
404 struct uci_package *p = uci_to_package(e);
405 int ret = UCI_ERR_INVAL;
407 if (s && (strcmp(s, e->name) != 0))
412 ret = uci_commit(ctx, &p, false);
415 ret = uci_save(ctx, p);
418 ret = uci_revert(ctx, &p, section, option);
426 lua_pushboolean(L, !failed);
431 uci_lua_save(lua_State *L)
433 return uci_lua_package_cmd(L, CMD_SAVE);
437 uci_lua_commit(lua_State *L)
439 return uci_lua_package_cmd(L, CMD_COMMIT);
443 uci_lua_revert(lua_State *L)
445 return uci_lua_package_cmd(L, CMD_REVERT);
449 uci_lua_set_confdir(lua_State *L)
453 luaL_checkstring(L, 1);
454 ret = uci_set_confdir(ctx, lua_tostring(L, -1));
455 lua_pushboolean(L, (ret == 0));
460 uci_lua_set_savedir(lua_State *L)
464 luaL_checkstring(L, 1);
465 ret = uci_set_savedir(ctx, lua_tostring(L, -1));
466 lua_pushboolean(L, (ret == 0));
471 static const luaL_Reg uci[] = {
472 { "load", uci_lua_load },
473 { "unload", uci_lua_unload },
474 { "get", uci_lua_get },
475 { "get_all", uci_lua_get_all },
476 { "add", uci_lua_add },
477 { "set", uci_lua_set },
478 { "save", uci_lua_save },
479 { "commit", uci_lua_commit },
480 { "revert", uci_lua_revert },
481 { "foreach", uci_lua_foreach },
482 { "set_confdir", uci_lua_set_confdir },
483 { "set_savedir", uci_lua_set_savedir },
489 luaopen_uci(lua_State *L)
491 ctx = uci_alloc_context();
493 luaL_error(L, "Cannot allocate UCI context\n");
494 luaL_register(L, MODNAME, uci);