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");
98 lua_pushstring(L, s->e.name);
99 lua_setfield(L, -2, ".name");
101 uci_foreach_element(&s->options, e) {
102 struct uci_option *o = uci_to_option(e);
103 lua_pushstring(L, o->value);
104 lua_setfield(L, -2, o->e.name);
108 static void uci_push_package(lua_State *L, struct uci_package *p)
110 struct uci_element *e;
114 uci_foreach_element(&p->sections, e) {
116 uci_push_section(L, uci_to_section(e));
117 lua_setfield(L, -2, e->name);
122 uci_lua_unload(lua_State *L)
124 struct uci_package *p;
127 luaL_checkstring(L, 1);
128 s = lua_tostring(L, -1);
129 p = find_package(L, s, AUTOLOAD_OFF);
132 lua_pushboolean(L, 1);
134 lua_pushboolean(L, 0);
140 uci_lua_load(lua_State *L)
142 struct uci_package *p = NULL;
146 lua_pop(L, 1); /* bool ret value of unload */
147 s = lua_tostring(L, -1);
149 if (uci_load(ctx, s, &p)) {
150 uci_lua_perror(L, "uci.load");
151 lua_pushboolean(L, 0);
153 lua_pushboolean(L, 1);
161 uci_lua_foreach(lua_State *L)
163 struct uci_package *p;
164 struct uci_element *e;
165 const char *package, *type;
168 package = luaL_checkstring(L, 1);
173 type = luaL_checkstring(L, 2);
175 if (!lua_isfunction(L, 3) || !package)
176 luaL_error(L, "Invalid argument");
178 p = find_package(L, package, AUTOLOAD_ON);
182 uci_foreach_element(&p->sections, e) {
183 struct uci_section *s = uci_to_section(e);
185 if (type && (strcmp(s->type, type) != 0))
188 lua_pushvalue(L, 3); /* iterator function */
189 uci_push_section(L, s);
190 if (lua_pcall(L, 1, 0, 0) == 0)
195 lua_pushboolean(L, ret);
200 uci_lua_get_any(lua_State *L, bool all)
202 struct uci_element *e = NULL;
203 struct uci_package *p = NULL;
204 const char *package = NULL;
205 const char *section = NULL;
206 const char *option = NULL;
208 int err = UCI_ERR_MEM;
213 luaL_checkstring(L, 1);
214 s = strdup(lua_tostring(L, 1));
219 package = luaL_checkstring(L, 1);
220 section = luaL_checkstring(L, 2);
222 option = luaL_checkstring(L, 3);
224 if ((err = uci_parse_tuple(ctx, s, (char **) &package, (char **) §ion, (char **) &option, NULL)))
228 if (!all && (section == NULL)) {
233 p = find_package(L, package, AUTOLOAD_ON);
235 err = UCI_ERR_NOTFOUND;
240 if ((err = uci_lookup(ctx, &e, p, section, option)))
247 case UCI_TYPE_PACKAGE:
248 uci_push_package(L, p);
250 case UCI_TYPE_SECTION:
252 uci_push_section(L, uci_to_section(e));
254 lua_pushstring(L, uci_to_section(e)->type);
256 case UCI_TYPE_OPTION:
257 lua_pushstring(L, uci_to_option(e)->value);
270 uci_lua_perror(L, "uci.get");
272 case UCI_ERR_NOTFOUND:
281 uci_lua_get(lua_State *L)
283 return uci_lua_get_any(L, false);
287 uci_lua_get_all(lua_State *L)
289 return uci_lua_get_any(L, true);
293 uci_lua_add(lua_State *L)
295 struct uci_section *s = NULL;
296 struct uci_package *p;
299 const char *name = NULL;
302 package = luaL_checkstring(L, 1);
303 type = luaL_checkstring(L, 2);
304 p = find_package(L, package, AUTOLOAD_ON);
308 if (uci_add_section(ctx, p, type, &s) || !s)
314 lua_pushstring(L, name);
319 uci_lua_delete(lua_State *L)
321 const char *package = NULL;
322 const char *section = NULL;
323 const char *option = NULL;
324 struct uci_package *p;
326 int err = UCI_ERR_MEM;
329 nargs = lua_gettop(L);
330 s = luaL_checkstring(L, 1);
333 /* Format: uci.delete("p.s[.o]") */
338 if ((err = uci_parse_tuple(ctx, (char *) s, (char **) &package, (char **) §ion, (char **) &option, NULL)))
342 /* Format: uci.delete("p", "s", "o") */
343 option = luaL_checkstring(L, 3);
346 /* Format: uci.delete("p", "s") */
347 section = luaL_checkstring(L, 2);
355 p = find_package(L, package, AUTOLOAD_ON);
357 err = UCI_ERR_NOTFOUND;
360 err = uci_delete(ctx, p, section, option);
364 uci_lua_perror(L, "uci.set");
365 lua_pushboolean(L, (err == 0));
370 uci_lua_set(lua_State *L)
372 struct uci_package *p;
373 const char *package = NULL;
374 const char *section = NULL;
375 const char *option = NULL;
376 const char *value = NULL;
378 int err = UCI_ERR_MEM;
381 nargs = lua_gettop(L);
383 s = luaL_checkstring(L, 1);
386 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
391 if ((err = uci_parse_tuple(ctx, (char *) s, (char **) &package, (char **) §ion, (char **) &option, (char **) &value)))
395 /* Format: uci.set("p", "s", "o", "v") */
396 option = luaL_checkstring(L, 3);
399 /* Format: uci.set("p", "s", "v") */
401 section = luaL_checkstring(L, 2);
402 value = luaL_checkstring(L, nargs);
409 if ((section == NULL) || (value == NULL)) {
414 p = find_package(L, package, AUTOLOAD_ON);
416 err = UCI_ERR_NOTFOUND;
419 err = uci_set(ctx, p, section, option, value, NULL);
423 uci_lua_perror(L, "uci.set");
424 lua_pushboolean(L, (err == 0));
435 uci_lua_package_cmd(lua_State *L, enum pkg_cmd cmd)
437 struct uci_element *e, *tmp;
438 const char *s = NULL;
439 const char *section = NULL;
440 const char *option = NULL;
444 nargs = lua_gettop(L);
447 if (cmd != CMD_REVERT)
449 luaL_checkstring(L, 1);
450 option = lua_tostring(L, -1);
454 if (cmd != CMD_REVERT)
456 luaL_checkstring(L, 1);
457 section = lua_tostring(L, -1);
461 luaL_checkstring(L, 1);
462 s = lua_tostring(L, -1);
469 luaL_error(L, "Invalid argument count");
473 uci_foreach_element_safe(&ctx->root, tmp, e) {
474 struct uci_package *p = uci_to_package(e);
475 int ret = UCI_ERR_INVAL;
477 if (s && (strcmp(s, e->name) != 0))
482 ret = uci_commit(ctx, &p, false);
485 ret = uci_save(ctx, p);
488 ret = uci_revert(ctx, &p, section, option);
496 lua_pushboolean(L, !failed);
501 uci_lua_save(lua_State *L)
503 return uci_lua_package_cmd(L, CMD_SAVE);
507 uci_lua_commit(lua_State *L)
509 return uci_lua_package_cmd(L, CMD_COMMIT);
513 uci_lua_revert(lua_State *L)
515 return uci_lua_package_cmd(L, CMD_REVERT);
519 uci_lua_add_change(lua_State *L, struct uci_element *e)
521 struct uci_history *h;
524 h = uci_to_history(e);
528 lua_getfield(L, -1, h->section);
529 if (lua_isnil(L, -1)) {
532 lua_pushvalue(L, -1); /* copy for setfield */
533 lua_setfield(L, -3, h->section);
536 name = (h->e.name ? h->e.name : ".type");
538 lua_pushstring(L, h->value);
540 lua_pushstring(L, "");
541 lua_setfield(L, -2, name);
546 uci_lua_changes_pkg(lua_State *L, const char *package)
548 struct uci_package *p = NULL;
549 struct uci_element *e;
550 bool autoload = false;
552 p = find_package(L, package, AUTOLOAD_OFF);
555 p = find_package(L, package, AUTOLOAD_FORCE);
560 if (uci_list_empty(&p->history) && uci_list_empty(&p->saved_history))
564 uci_foreach_element(&p->saved_history, e) {
565 uci_lua_add_change(L, e);
567 uci_foreach_element(&p->history, e) {
568 uci_lua_add_change(L, e);
570 lua_setfield(L, -2, p->e.name);
578 uci_lua_changes(lua_State *L)
580 const char *package = NULL;
581 char **config = NULL;
585 nargs = lua_gettop(L);
588 package = luaL_checkstring(L, 1);
592 luaL_error(L, "invalid argument count");
597 uci_lua_changes_pkg(L, package);
599 if (uci_list_configs(ctx, &config) != 0)
602 for(i = 0; config[i] != NULL; i++) {
603 uci_lua_changes_pkg(L, config[i]);
612 uci_lua_set_confdir(lua_State *L)
616 luaL_checkstring(L, 1);
617 ret = uci_set_confdir(ctx, lua_tostring(L, -1));
618 lua_pushboolean(L, (ret == 0));
623 uci_lua_set_savedir(lua_State *L)
627 luaL_checkstring(L, 1);
628 ret = uci_set_savedir(ctx, lua_tostring(L, -1));
629 lua_pushboolean(L, (ret == 0));
634 static const luaL_Reg uci[] = {
635 { "load", uci_lua_load },
636 { "unload", uci_lua_unload },
637 { "get", uci_lua_get },
638 { "get_all", uci_lua_get_all },
639 { "add", uci_lua_add },
640 { "set", uci_lua_set },
641 { "save", uci_lua_save },
642 { "delete", uci_lua_delete },
643 { "commit", uci_lua_commit },
644 { "revert", uci_lua_revert },
645 { "changes", uci_lua_changes },
646 { "foreach", uci_lua_foreach },
647 { "set_confdir", uci_lua_set_confdir },
648 { "set_savedir", uci_lua_set_savedir },
654 luaopen_uci(lua_State *L)
656 ctx = uci_alloc_context();
658 luaL_error(L, "Cannot allocate UCI context\n");
659 luaL_register(L, MODNAME, uci);
661 /* enable autoload by default */
662 lua_getfield(L, LUA_GLOBALSINDEX, "uci");
663 lua_pushboolean(L, 1);
664 lua_setfield(L, -2, "autoload");