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_option(lua_State *L, struct uci_option *o)
93 struct uci_element *e;
98 lua_pushstring(L, o->v.string);
102 uci_foreach_element(&o->v.list, e) {
104 lua_pushstring(L, e->name);
105 lua_rawseti(L, -2, i);
114 static void uci_push_section(lua_State *L, struct uci_section *s)
116 struct uci_element *e;
119 lua_pushstring(L, s->type);
120 lua_setfield(L, -2, ".type");
121 lua_pushstring(L, s->e.name);
122 lua_setfield(L, -2, ".name");
124 uci_foreach_element(&s->options, e) {
125 struct uci_option *o = uci_to_option(e);
126 uci_push_option(L, o);
127 lua_setfield(L, -2, o->e.name);
131 static void uci_push_package(lua_State *L, struct uci_package *p)
133 struct uci_element *e;
137 uci_foreach_element(&p->sections, e) {
139 uci_push_section(L, uci_to_section(e));
140 lua_setfield(L, -2, e->name);
145 uci_lua_unload(lua_State *L)
147 struct uci_package *p;
150 luaL_checkstring(L, 1);
151 s = lua_tostring(L, -1);
152 p = find_package(L, s, AUTOLOAD_OFF);
155 lua_pushboolean(L, 1);
157 lua_pushboolean(L, 0);
163 uci_lua_load(lua_State *L)
165 struct uci_package *p = NULL;
169 lua_pop(L, 1); /* bool ret value of unload */
170 s = lua_tostring(L, -1);
172 if (uci_load(ctx, s, &p)) {
173 uci_lua_perror(L, "uci.load");
174 lua_pushboolean(L, 0);
176 lua_pushboolean(L, 1);
184 uci_lua_foreach(lua_State *L)
186 struct uci_package *p;
187 struct uci_element *e;
188 const char *package, *type;
191 package = luaL_checkstring(L, 1);
196 type = luaL_checkstring(L, 2);
198 if (!lua_isfunction(L, 3) || !package)
199 luaL_error(L, "Invalid argument");
201 p = find_package(L, package, AUTOLOAD_ON);
205 uci_foreach_element(&p->sections, e) {
206 struct uci_section *s = uci_to_section(e);
208 if (type && (strcmp(s->type, type) != 0))
211 lua_pushvalue(L, 3); /* iterator function */
212 uci_push_section(L, s);
213 if (lua_pcall(L, 1, 0, 0) == 0)
218 lua_pushboolean(L, ret);
223 uci_lua_get_any(lua_State *L, bool all)
225 struct uci_element *e = NULL;
226 struct uci_package *p = NULL;
227 struct uci_option *o = NULL;
228 const char *package = NULL;
229 const char *section = NULL;
230 const char *option = NULL;
232 int err = UCI_ERR_MEM;
237 luaL_checkstring(L, 1);
238 s = strdup(lua_tostring(L, 1));
243 package = luaL_checkstring(L, 1);
244 section = luaL_checkstring(L, 2);
246 option = luaL_checkstring(L, 3);
248 if ((err = uci_parse_tuple(ctx, s, (char **) &package, (char **) §ion, (char **) &option, NULL)))
252 if (!all && (section == NULL)) {
257 p = find_package(L, package, AUTOLOAD_ON);
259 err = UCI_ERR_NOTFOUND;
264 if ((err = uci_lookup(ctx, &e, p, section, option)))
271 case UCI_TYPE_PACKAGE:
272 uci_push_package(L, p);
274 case UCI_TYPE_SECTION:
276 uci_push_section(L, uci_to_section(e));
278 lua_pushstring(L, uci_to_section(e)->type);
280 case UCI_TYPE_OPTION:
281 o = uci_to_option(e);
282 uci_push_option(L, o);
295 uci_lua_perror(L, "uci.get");
297 case UCI_ERR_NOTFOUND:
306 uci_lua_get(lua_State *L)
308 return uci_lua_get_any(L, false);
312 uci_lua_get_all(lua_State *L)
314 return uci_lua_get_any(L, true);
318 uci_lua_add(lua_State *L)
320 struct uci_section *s = NULL;
321 struct uci_package *p;
324 const char *name = NULL;
327 package = luaL_checkstring(L, 1);
328 type = luaL_checkstring(L, 2);
329 p = find_package(L, package, AUTOLOAD_ON);
333 if (uci_add_section(ctx, p, type, &s) || !s)
339 lua_pushstring(L, name);
344 uci_lua_delete(lua_State *L)
346 const char *package = NULL;
347 const char *section = NULL;
348 const char *option = NULL;
349 struct uci_package *p;
351 int err = UCI_ERR_MEM;
354 nargs = lua_gettop(L);
355 s = luaL_checkstring(L, 1);
358 /* Format: uci.delete("p.s[.o]") */
363 if ((err = uci_parse_tuple(ctx, (char *) s, (char **) &package, (char **) §ion, (char **) &option, NULL)))
367 /* Format: uci.delete("p", "s", "o") */
368 option = luaL_checkstring(L, 3);
371 /* Format: uci.delete("p", "s") */
372 section = luaL_checkstring(L, 2);
380 p = find_package(L, package, AUTOLOAD_ON);
382 err = UCI_ERR_NOTFOUND;
385 err = uci_delete(ctx, p, section, option);
389 uci_lua_perror(L, "uci.set");
390 lua_pushboolean(L, (err == 0));
395 uci_lua_set(lua_State *L)
397 struct uci_package *p;
398 const char *package = NULL;
399 const char *section = NULL;
400 const char *option = NULL;
401 const char *value = NULL;
403 int err = UCI_ERR_MEM;
406 nargs = lua_gettop(L);
408 s = luaL_checkstring(L, 1);
411 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
416 if ((err = uci_parse_tuple(ctx, (char *) s, (char **) &package, (char **) §ion, (char **) &option, (char **) &value)))
420 /* Format: uci.set("p", "s", "o", "v") */
421 option = luaL_checkstring(L, 3);
424 /* Format: uci.set("p", "s", "v") */
426 section = luaL_checkstring(L, 2);
427 value = luaL_checkstring(L, nargs);
434 if ((section == NULL) || (value == NULL)) {
439 p = find_package(L, package, AUTOLOAD_ON);
441 err = UCI_ERR_NOTFOUND;
444 err = uci_set(ctx, p, section, option, value, NULL);
448 uci_lua_perror(L, "uci.set");
449 lua_pushboolean(L, (err == 0));
460 uci_lua_package_cmd(lua_State *L, enum pkg_cmd cmd)
462 struct uci_element *e, *tmp;
463 const char *s = NULL;
464 const char *section = NULL;
465 const char *option = NULL;
469 nargs = lua_gettop(L);
472 if (cmd != CMD_REVERT)
474 luaL_checkstring(L, 1);
475 option = lua_tostring(L, -1);
479 if (cmd != CMD_REVERT)
481 luaL_checkstring(L, 1);
482 section = lua_tostring(L, -1);
486 luaL_checkstring(L, 1);
487 s = lua_tostring(L, -1);
494 luaL_error(L, "Invalid argument count");
498 uci_foreach_element_safe(&ctx->root, tmp, e) {
499 struct uci_package *p = uci_to_package(e);
500 int ret = UCI_ERR_INVAL;
502 if (s && (strcmp(s, e->name) != 0))
507 ret = uci_commit(ctx, &p, false);
510 ret = uci_save(ctx, p);
513 ret = uci_revert(ctx, &p, section, option);
521 lua_pushboolean(L, !failed);
526 uci_lua_save(lua_State *L)
528 return uci_lua_package_cmd(L, CMD_SAVE);
532 uci_lua_commit(lua_State *L)
534 return uci_lua_package_cmd(L, CMD_COMMIT);
538 uci_lua_revert(lua_State *L)
540 return uci_lua_package_cmd(L, CMD_REVERT);
544 uci_lua_add_change(lua_State *L, struct uci_element *e)
546 struct uci_history *h;
549 h = uci_to_history(e);
553 lua_getfield(L, -1, h->section);
554 if (lua_isnil(L, -1)) {
557 lua_pushvalue(L, -1); /* copy for setfield */
558 lua_setfield(L, -3, h->section);
561 name = (h->e.name ? h->e.name : ".type");
563 lua_pushstring(L, h->value);
565 lua_pushstring(L, "");
566 lua_setfield(L, -2, name);
571 uci_lua_changes_pkg(lua_State *L, const char *package)
573 struct uci_package *p = NULL;
574 struct uci_element *e;
575 bool autoload = false;
577 p = find_package(L, package, AUTOLOAD_OFF);
580 p = find_package(L, package, AUTOLOAD_FORCE);
585 if (uci_list_empty(&p->history) && uci_list_empty(&p->saved_history))
589 uci_foreach_element(&p->saved_history, e) {
590 uci_lua_add_change(L, e);
592 uci_foreach_element(&p->history, e) {
593 uci_lua_add_change(L, e);
595 lua_setfield(L, -2, p->e.name);
603 uci_lua_changes(lua_State *L)
605 const char *package = NULL;
606 char **config = NULL;
610 nargs = lua_gettop(L);
613 package = luaL_checkstring(L, 1);
617 luaL_error(L, "invalid argument count");
622 uci_lua_changes_pkg(L, package);
624 if (uci_list_configs(ctx, &config) != 0)
627 for(i = 0; config[i] != NULL; i++) {
628 uci_lua_changes_pkg(L, config[i]);
637 uci_lua_set_confdir(lua_State *L)
641 luaL_checkstring(L, 1);
642 ret = uci_set_confdir(ctx, lua_tostring(L, -1));
643 lua_pushboolean(L, (ret == 0));
648 uci_lua_set_savedir(lua_State *L)
652 luaL_checkstring(L, 1);
653 ret = uci_set_savedir(ctx, lua_tostring(L, -1));
654 lua_pushboolean(L, (ret == 0));
659 static const luaL_Reg uci[] = {
660 { "load", uci_lua_load },
661 { "unload", uci_lua_unload },
662 { "get", uci_lua_get },
663 { "get_all", uci_lua_get_all },
664 { "add", uci_lua_add },
665 { "set", uci_lua_set },
666 { "save", uci_lua_save },
667 { "delete", uci_lua_delete },
668 { "commit", uci_lua_commit },
669 { "revert", uci_lua_revert },
670 { "changes", uci_lua_changes },
671 { "foreach", uci_lua_foreach },
672 { "set_confdir", uci_lua_set_confdir },
673 { "set_savedir", uci_lua_set_savedir },
679 luaopen_uci(lua_State *L)
681 ctx = uci_alloc_context();
683 luaL_error(L, "Cannot allocate UCI context\n");
684 luaL_register(L, MODNAME, uci);
686 /* enable autoload by default */
687 lua_getfield(L, LUA_GLOBALSINDEX, "uci");
688 lua_pushboolean(L, 1);
689 lua_setfield(L, -2, "autoload");