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;
43 static struct uci_package *
44 find_package(lua_State *L, const char *name, enum autoload al)
46 struct uci_package *p = NULL;
47 struct uci_element *e;
49 uci_foreach_element(&ctx->root, e) {
50 if (strcmp(e->name, name) != 0)
53 p = uci_to_package(e);
57 if (al == AUTOLOAD_FORCE)
58 uci_load(ctx, name, &p);
61 lua_getfield(L, LUA_GLOBALSINDEX, "uci");
62 lua_getfield(L, -1, "autoload");
63 if (!lua_isboolean(L, -1))
66 if (!lua_toboolean(L, -1))
69 uci_load(ctx, name, &p);
78 static void uci_lua_perror(lua_State *L, char *name)
80 lua_getfield(L, LUA_GLOBALSINDEX, "uci");
81 lua_getfield(L, -1, "warn");
82 if (!lua_isboolean(L, -1))
84 if (lua_toboolean(L, -1) != 1)
86 uci_perror(ctx, name);
91 static void uci_push_section(lua_State *L, struct uci_section *s)
93 struct uci_element *e;
96 lua_pushstring(L, s->type);
97 lua_setfield(L, -2, ".TYPE");
99 uci_foreach_element(&s->options, e) {
100 struct uci_option *o = uci_to_option(e);
101 lua_pushstring(L, o->value);
102 lua_setfield(L, -2, o->e.name);
106 static void uci_push_package(lua_State *L, struct uci_package *p)
108 struct uci_element *e;
112 uci_foreach_element(&p->sections, e) {
114 uci_push_section(L, uci_to_section(e));
115 lua_setfield(L, -2, e->name);
120 uci_lua_unload(lua_State *L)
122 struct uci_package *p;
125 luaL_checkstring(L, 1);
126 s = lua_tostring(L, -1);
127 p = find_package(L, s, AUTOLOAD_OFF);
130 lua_pushboolean(L, 1);
132 lua_pushboolean(L, 0);
138 uci_lua_load(lua_State *L)
140 struct uci_package *p = NULL;
144 lua_pop(L, 1); /* bool ret value of unload */
145 s = lua_tostring(L, -1);
147 if (uci_load(ctx, s, &p)) {
148 uci_lua_perror(L, "uci.load");
149 lua_pushboolean(L, 0);
151 lua_pushboolean(L, 1);
159 uci_lua_foreach(lua_State *L)
161 struct uci_package *p;
162 struct uci_element *e;
163 const char *package, *type;
166 package = luaL_checkstring(L, 1);
171 type = luaL_checkstring(L, 2);
173 if (!lua_isfunction(L, 3) || !package)
174 luaL_error(L, "Invalid argument");
176 p = find_package(L, package, AUTOLOAD_ON);
180 uci_foreach_element(&p->sections, e) {
181 struct uci_section *s = uci_to_section(e);
183 if (type && (strcmp(s->type, type) != 0))
186 lua_pushvalue(L, 3); /* iterator function */
187 uci_push_section(L, s);
188 if (lua_pcall(L, 1, 0, 0) == 0)
193 lua_pushboolean(L, ret);
198 uci_lua_get_any(lua_State *L, bool all)
200 struct uci_element *e = NULL;
201 struct uci_package *p = NULL;
202 const char *package = NULL;
203 const char *section = NULL;
204 const char *option = NULL;
206 int err = UCI_ERR_MEM;
211 luaL_checkstring(L, 1);
212 s = strdup(lua_tostring(L, 1));
217 package = luaL_checkstring(L, 1);
218 section = luaL_checkstring(L, 2);
220 option = luaL_checkstring(L, 3);
222 if ((err = uci_parse_tuple(ctx, s, (char **) &package, (char **) §ion, (char **) &option, NULL)))
226 if (!all && (section == NULL)) {
231 p = find_package(L, package, AUTOLOAD_ON);
233 err = UCI_ERR_NOTFOUND;
238 if ((err = uci_lookup(ctx, &e, p, section, option)))
245 case UCI_TYPE_PACKAGE:
246 uci_push_package(L, p);
248 case UCI_TYPE_SECTION:
250 uci_push_section(L, uci_to_section(e));
252 lua_pushstring(L, uci_to_section(e)->type);
254 case UCI_TYPE_OPTION:
255 lua_pushstring(L, uci_to_option(e)->value);
268 uci_lua_perror(L, "uci.get");
270 case UCI_ERR_NOTFOUND:
279 uci_lua_get(lua_State *L)
281 return uci_lua_get_any(L, false);
285 uci_lua_get_all(lua_State *L)
287 return uci_lua_get_any(L, true);
291 uci_lua_add(lua_State *L)
293 struct uci_section *s = NULL;
294 struct uci_package *p;
297 const char *name = NULL;
300 package = luaL_checkstring(L, 1);
301 type = luaL_checkstring(L, 2);
302 p = find_package(L, package, AUTOLOAD_ON);
306 if (uci_add_section(ctx, p, type, &s) || !s)
312 lua_pushstring(L, name);
317 uci_lua_delete(lua_State *L)
319 const char *package = NULL;
320 const char *section = NULL;
321 const char *option = NULL;
322 struct uci_package *p;
324 int err = UCI_ERR_MEM;
327 nargs = lua_gettop(L);
328 s = luaL_checkstring(L, 1);
331 /* Format: uci.delete("p.s[.o]") */
336 if ((err = uci_parse_tuple(ctx, (char *) s, (char **) &package, (char **) §ion, (char **) &option, NULL)))
340 /* Format: uci.delete("p", "s", "o") */
341 option = luaL_checkstring(L, 3);
344 /* Format: uci.delete("p", "s") */
345 section = luaL_checkstring(L, 2);
353 p = find_package(L, package, AUTOLOAD_ON);
355 err = UCI_ERR_NOTFOUND;
358 err = uci_delete(ctx, p, section, option);
362 uci_lua_perror(L, "uci.set");
363 lua_pushboolean(L, (err == 0));
368 uci_lua_set(lua_State *L)
370 struct uci_package *p;
371 const char *package = NULL;
372 const char *section = NULL;
373 const char *option = NULL;
374 const char *value = NULL;
376 int err = UCI_ERR_MEM;
379 nargs = lua_gettop(L);
381 s = luaL_checkstring(L, 1);
384 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
389 if ((err = uci_parse_tuple(ctx, (char *) s, (char **) &package, (char **) §ion, (char **) &option, (char **) &value)))
393 /* Format: uci.set("p", "s", "o", "v") */
394 option = luaL_checkstring(L, 3);
397 /* Format: uci.set("p", "s", "v") */
399 section = luaL_checkstring(L, 2);
400 value = luaL_checkstring(L, nargs);
407 if ((section == NULL) || (value == NULL)) {
412 p = find_package(L, package, AUTOLOAD_ON);
414 err = UCI_ERR_NOTFOUND;
417 err = uci_set(ctx, p, section, option, value, NULL);
421 uci_lua_perror(L, "uci.set");
422 lua_pushboolean(L, (err == 0));
433 uci_lua_package_cmd(lua_State *L, enum pkg_cmd cmd)
435 struct uci_element *e, *tmp;
436 const char *s = NULL;
437 const char *section = NULL;
438 const char *option = NULL;
442 nargs = lua_gettop(L);
445 if (cmd != CMD_REVERT)
447 luaL_checkstring(L, 1);
448 option = lua_tostring(L, -1);
452 if (cmd != CMD_REVERT)
454 luaL_checkstring(L, 1);
455 section = lua_tostring(L, -1);
459 luaL_checkstring(L, 1);
460 s = lua_tostring(L, -1);
467 luaL_error(L, "Invalid argument count");
471 uci_foreach_element_safe(&ctx->root, tmp, e) {
472 struct uci_package *p = uci_to_package(e);
473 int ret = UCI_ERR_INVAL;
475 if (s && (strcmp(s, e->name) != 0))
480 ret = uci_commit(ctx, &p, false);
483 ret = uci_save(ctx, p);
486 ret = uci_revert(ctx, &p, section, option);
494 lua_pushboolean(L, !failed);
499 uci_lua_save(lua_State *L)
501 return uci_lua_package_cmd(L, CMD_SAVE);
505 uci_lua_commit(lua_State *L)
507 return uci_lua_package_cmd(L, CMD_COMMIT);
511 uci_lua_revert(lua_State *L)
513 return uci_lua_package_cmd(L, CMD_REVERT);
517 uci_lua_add_change(lua_State *L, struct uci_element *e)
519 struct uci_history *h;
522 h = uci_to_history(e);
526 lua_getfield(L, -1, h->section);
527 if (lua_isnil(L, -1)) {
530 lua_pushvalue(L, -1); /* copy for setfield */
531 lua_setfield(L, -3, h->section);
534 name = (h->e.name ? h->e.name : ".TYPE");
536 lua_pushstring(L, h->value);
538 lua_pushstring(L, "");
539 lua_setfield(L, -2, name);
544 uci_lua_changes_pkg(lua_State *L, const char *package)
546 struct uci_package *p = NULL;
547 struct uci_element *e;
548 bool autoload = false;
550 p = find_package(L, package, AUTOLOAD_OFF);
553 p = find_package(L, package, AUTOLOAD_FORCE);
558 if (uci_list_empty(&p->history) && uci_list_empty(&p->saved_history))
562 uci_foreach_element(&p->saved_history, e) {
563 uci_lua_add_change(L, e);
565 uci_foreach_element(&p->history, e) {
566 uci_lua_add_change(L, e);
568 lua_setfield(L, -2, p->e.name);
576 uci_lua_changes(lua_State *L)
578 const char *package = NULL;
579 char **config = NULL;
583 nargs = lua_gettop(L);
586 package = luaL_checkstring(L, 1);
590 luaL_error(L, "invalid argument count");
595 uci_lua_changes_pkg(L, package);
597 if (uci_list_configs(ctx, &config) != 0)
600 for(i = 0; config[i] != NULL; i++) {
601 uci_lua_changes_pkg(L, config[i]);
610 uci_lua_set_confdir(lua_State *L)
614 luaL_checkstring(L, 1);
615 ret = uci_set_confdir(ctx, lua_tostring(L, -1));
616 lua_pushboolean(L, (ret == 0));
621 uci_lua_set_savedir(lua_State *L)
625 luaL_checkstring(L, 1);
626 ret = uci_set_savedir(ctx, lua_tostring(L, -1));
627 lua_pushboolean(L, (ret == 0));
632 static const luaL_Reg uci[] = {
633 { "load", uci_lua_load },
634 { "unload", uci_lua_unload },
635 { "get", uci_lua_get },
636 { "get_all", uci_lua_get_all },
637 { "add", uci_lua_add },
638 { "set", uci_lua_set },
639 { "save", uci_lua_save },
640 { "delete", uci_lua_delete },
641 { "commit", uci_lua_commit },
642 { "revert", uci_lua_revert },
643 { "changes", uci_lua_changes },
644 { "foreach", uci_lua_foreach },
645 { "set_confdir", uci_lua_set_confdir },
646 { "set_savedir", uci_lua_set_savedir },
652 luaopen_uci(lua_State *L)
654 ctx = uci_alloc_context();
656 luaL_error(L, "Cannot allocate UCI context\n");
657 luaL_register(L, MODNAME, uci);
659 /* enable autoload by default */
660 lua_getfield(L, LUA_GLOBALSINDEX, "uci");
661 lua_pushboolean(L, 1);
662 lua_setfield(L, -2, "autoload");