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>
28 #define METANAME MODNAME ".meta"
32 #define DPRINTF(...) fprintf(stderr, __VA_ARGS__)
34 #define DPRINTF(...) do {} while (0)
37 static struct uci_context *global_ctx = NULL;
39 static struct uci_context *
40 find_context(lua_State *L, int *offset)
42 struct uci_context **ctx;
43 if (!lua_isuserdata(L, 1)) {
45 global_ctx = uci_alloc_context();
47 luaL_error(L, "failed to allocate UCI context");
57 ctx = luaL_checkudata(L, 1, METANAME);
59 luaL_error(L, "failed to get UCI context");
66 static struct uci_package *
67 find_package(lua_State *L, struct uci_context *ctx, const char *str, bool al)
69 struct uci_package *p = NULL;
70 struct uci_element *e;
74 sep = strchr(str, '.');
76 name = malloc(1 + sep - str);
78 luaL_error(L, "out of memory");
81 strncpy(name, str, sep - str);
86 uci_foreach_element(&ctx->root, e) {
87 if (strcmp(e->name, name) != 0)
90 p = uci_to_package(e);
95 uci_load(ctx, name, &p);
97 uci_load(ctx, name, &p);
107 lookup_args(lua_State *L, struct uci_context *ctx, int offset, struct uci_ptr *ptr, char **buf)
113 luaL_checkstring(L, 1 + offset);
114 s = strdup(lua_tostring(L, 1 + offset));
118 memset(ptr, 0, sizeof(struct uci_ptr));
119 if (!find_package(L, ctx, s, true))
122 switch (n - offset) {
125 ptr->option = luaL_checkstring(L, 3 + offset);
128 ptr->section = luaL_checkstring(L, 2 + offset);
129 ptr->package = luaL_checkstring(L, 1 + offset);
130 if (uci_lookup_ptr(ctx, ptr, NULL, true) != UCI_OK)
134 if (uci_lookup_ptr(ctx, ptr, s, true) != UCI_OK)
138 luaL_error(L, "invalid argument count");
152 uci_push_status(lua_State *L, struct uci_context *ctx, bool hasarg)
157 lua_pushboolean(L, (ctx->err == UCI_OK));
159 uci_get_errorstr(ctx, &str, MODNAME);
161 lua_pushstring(L, str);
170 uci_push_option(lua_State *L, struct uci_option *o)
172 struct uci_element *e;
176 case UCI_TYPE_STRING:
177 lua_pushstring(L, o->v.string);
181 uci_foreach_element(&o->v.list, e) {
183 lua_pushstring(L, e->name);
184 lua_rawseti(L, -2, i);
194 uci_push_section(lua_State *L, struct uci_section *s, int index)
196 struct uci_element *e;
199 lua_pushboolean(L, s->anonymous);
200 lua_setfield(L, -2, ".anonymous");
201 lua_pushstring(L, s->type);
202 lua_setfield(L, -2, ".type");
203 lua_pushstring(L, s->e.name);
204 lua_setfield(L, -2, ".name");
206 lua_pushinteger(L, index);
207 lua_setfield(L, -2, ".index");
210 uci_foreach_element(&s->options, e) {
211 struct uci_option *o = uci_to_option(e);
212 uci_push_option(L, o);
213 lua_setfield(L, -2, o->e.name);
218 uci_push_package(lua_State *L, struct uci_package *p)
220 struct uci_element *e;
224 uci_foreach_element(&p->sections, e) {
225 uci_push_section(L, uci_to_section(e), i);
226 lua_setfield(L, -2, e->name);
232 uci_lua_unload(lua_State *L)
234 struct uci_context *ctx;
235 struct uci_package *p;
239 ctx = find_context(L, &offset);
240 luaL_checkstring(L, 1 + offset);
241 s = lua_tostring(L, 1 + offset);
242 p = find_package(L, ctx, s, false);
245 return uci_push_status(L, ctx, false);
247 lua_pushboolean(L, 0);
253 uci_lua_load(lua_State *L)
255 struct uci_context *ctx;
256 struct uci_package *p = NULL;
260 ctx = find_context(L, &offset);
262 lua_pop(L, 1); /* bool ret value of unload */
263 s = lua_tostring(L, -1);
265 uci_load(ctx, s, &p);
266 return uci_push_status(L, ctx, false);
271 uci_lua_foreach(lua_State *L)
273 struct uci_context *ctx;
274 struct uci_package *p;
275 struct uci_element *e, *tmp;
276 const char *package, *type;
281 ctx = find_context(L, &offset);
282 package = luaL_checkstring(L, 1 + offset);
287 type = luaL_checkstring(L, 2 + offset);
289 if (!lua_isfunction(L, 3 + offset) || !package)
290 return luaL_error(L, "Invalid argument");
292 p = find_package(L, ctx, package, true);
296 uci_foreach_element_safe(&p->sections, tmp, e) {
297 struct uci_section *s = uci_to_section(e);
301 if (type && (strcmp(s->type, type) != 0))
304 lua_pushvalue(L, 3 + offset); /* iterator function */
305 uci_push_section(L, s, i - 1);
306 if (lua_pcall(L, 1, 1, 0) == 0) {
308 if (lua_isboolean(L, -1) && !lua_toboolean(L, -1))
319 lua_pushboolean(L, ret);
324 uci_lua_get_any(lua_State *L, bool all)
326 struct uci_context *ctx;
327 struct uci_element *e = NULL;
331 int err = UCI_ERR_NOTFOUND;
333 ctx = find_context(L, &offset);
335 if (lookup_args(L, ctx, offset, &ptr, &s))
338 uci_lookup_ptr(ctx, &ptr, NULL, true);
339 if (!all && !ptr.s) {
343 if (!(ptr.flags & UCI_LOOKUP_COMPLETE)) {
344 err = UCI_ERR_NOTFOUND;
351 case UCI_TYPE_PACKAGE:
352 uci_push_package(L, ptr.p);
354 case UCI_TYPE_SECTION:
356 uci_push_section(L, ptr.s, -1);
358 lua_pushstring(L, ptr.s->type);
360 case UCI_TYPE_OPTION:
361 uci_push_option(L, ptr.o);
375 return uci_push_status(L, ctx, true);
379 uci_lua_get(lua_State *L)
381 return uci_lua_get_any(L, false);
385 uci_lua_get_all(lua_State *L)
387 return uci_lua_get_any(L, true);
391 uci_lua_add(lua_State *L)
393 struct uci_context *ctx;
394 struct uci_section *s = NULL;
395 struct uci_package *p;
398 const char *name = NULL;
401 ctx = find_context(L, &offset);
402 package = luaL_checkstring(L, 1 + offset);
403 type = luaL_checkstring(L, 2 + offset);
404 p = find_package(L, ctx, package, true);
408 if (uci_add_section(ctx, p, type, &s) || !s)
412 lua_pushstring(L, name);
417 return uci_push_status(L, ctx, true);
421 uci_lua_delete(lua_State *L)
423 struct uci_context *ctx;
428 ctx = find_context(L, &offset);
430 if (lookup_args(L, ctx, offset, &ptr, &s))
433 uci_delete(ctx, &ptr);
438 return uci_push_status(L, ctx, false);
442 uci_lua_rename(lua_State *L)
444 struct uci_context *ctx;
446 int err = UCI_ERR_MEM;
448 int nargs, offset = 0;
450 ctx = find_context(L, &offset);
451 nargs = lua_gettop(L);
452 if (lookup_args(L, ctx, offset, &ptr, &s))
455 switch(nargs - offset) {
457 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
460 /* Format: uci.set("p", "s", "o", "v") */
461 ptr.value = luaL_checkstring(L, nargs);
464 /* Format: uci.set("p", "s", "v") */
465 ptr.value = ptr.option;
473 err = uci_lookup_ptr(ctx, &ptr, NULL, true);
477 if (((ptr.s == NULL) && (ptr.option != NULL)) || (ptr.value == NULL)) {
482 err = uci_rename(ctx, &ptr);
487 return uci_push_status(L, ctx, false);
491 uci_lua_reorder(lua_State *L)
493 struct uci_context *ctx;
495 int err = UCI_ERR_MEM;
497 int nargs, offset = 0;
499 ctx = find_context(L, &offset);
500 nargs = lua_gettop(L);
501 if (lookup_args(L, ctx, offset, &ptr, &s))
504 switch(nargs - offset) {
506 /* Format: uci.set("p.s=v") or uci.set("p.s=v") */
513 /* Format: uci.set("p", "s", "v") */
514 ptr.value = ptr.option;
522 err = uci_lookup_ptr(ctx, &ptr, NULL, true);
526 if ((ptr.s == NULL) || (ptr.value == NULL)) {
531 err = uci_reorder_section(ctx, ptr.s, strtoul(ptr.value, NULL, 10));
536 return uci_push_status(L, ctx, false);
541 uci_lua_set(lua_State *L)
543 struct uci_context *ctx;
545 bool istable = false;
546 int err = UCI_ERR_MEM;
548 int i, nargs, offset = 0;
550 ctx = find_context(L, &offset);
551 nargs = lua_gettop(L);
552 if (lookup_args(L, ctx, offset, &ptr, &s))
555 switch(nargs - offset) {
557 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
560 /* Format: uci.set("p", "s", "o", "v") */
561 if (lua_istable(L, nargs)) {
562 if (lua_objlen(L, nargs) < 1)
563 return luaL_error(L, "Cannot set an uci option to an empty table value");
564 lua_rawgeti(L, nargs, 1);
565 ptr.value = luaL_checkstring(L, -1);
569 ptr.value = luaL_checkstring(L, nargs);
573 /* Format: uci.set("p", "s", "v") */
574 ptr.value = ptr.option;
582 err = uci_lookup_ptr(ctx, &ptr, NULL, true);
586 if (((ptr.s == NULL) && (ptr.option != NULL)) || (ptr.value == NULL)) {
592 if (lua_objlen(L, nargs) == 1) {
595 err = uci_delete(ctx, &ptr);
598 err = uci_set(ctx, &ptr);
603 for (; i <= lua_objlen(L, nargs); i++) {
604 lua_rawgeti(L, nargs, i);
605 ptr.value = luaL_checkstring(L, -1);
606 err = uci_add_list(ctx, &ptr);
612 err = uci_set(ctx, &ptr);
619 return uci_push_status(L, ctx, false);
629 uci_lua_package_cmd(lua_State *L, enum pkg_cmd cmd)
631 struct uci_context *ctx;
632 struct uci_element *e, *tmp;
635 int nargs, offset = 0;
637 ctx = find_context(L, &offset);
638 nargs = lua_gettop(L);
639 if ((cmd != CMD_REVERT) && (nargs - offset > 1))
642 if (lookup_args(L, ctx, offset, &ptr, &s))
645 uci_lookup_ptr(ctx, &ptr, NULL, true);
647 uci_foreach_element_safe(&ctx->root, tmp, e) {
648 struct uci_package *p = uci_to_package(e);
650 if (ptr.p && (ptr.p != p))
656 uci_commit(ctx, &p, false);
662 uci_revert(ctx, &ptr);
668 return uci_push_status(L, ctx, false);
672 uci_lua_save(lua_State *L)
674 return uci_lua_package_cmd(L, CMD_SAVE);
678 uci_lua_commit(lua_State *L)
680 return uci_lua_package_cmd(L, CMD_COMMIT);
684 uci_lua_revert(lua_State *L)
686 return uci_lua_package_cmd(L, CMD_REVERT);
690 uci_lua_add_change(lua_State *L, struct uci_element *e)
700 lua_getfield(L, -1, h->section);
701 if (lua_isnil(L, -1)) {
704 lua_pushvalue(L, -1); /* copy for setfield */
705 lua_setfield(L, -3, h->section);
709 value = h->value ? h->value : "";
712 lua_getfield(L, -1, name);
714 /* this delta is a list add operation */
715 if (h->cmd == UCI_CMD_LIST_ADD) {
716 /* there seems to be no table yet */
717 if (!lua_istable(L, -1)) {
720 /* if there is a value on the stack already, add */
721 if (!lua_isnil(L, -2)) {
722 lua_pushvalue(L, -2);
723 lua_rawseti(L, -2, 1);
724 lua_pushstring(L, value);
725 lua_rawseti(L, -2, 2);
727 /* this is the first table item */
729 lua_pushstring(L, value);
730 lua_rawseti(L, -2, 1);
733 lua_setfield(L, -3, name);
735 /* a table is on the top of the stack and this is a subsequent,
736 * list_add, append this value to table */
738 lua_pushstring(L, value);
739 lua_rawseti(L, -2, lua_objlen(L, -2) + 1);
742 /* non-list change, simply set/replace field */
744 lua_pushstring(L, value);
745 lua_setfield(L, -3, name);
750 lua_pushstring(L, value);
751 lua_setfield(L, -2, ".type");
758 uci_lua_changes_pkg(lua_State *L, struct uci_context *ctx, const char *package)
760 struct uci_package *p = NULL;
761 struct uci_element *e;
762 bool autoload = false;
764 p = find_package(L, ctx, package, false);
767 p = find_package(L, ctx, package, true);
772 if (uci_list_empty(&p->delta) && uci_list_empty(&p->saved_delta))
776 uci_foreach_element(&p->saved_delta, e) {
777 uci_lua_add_change(L, e);
779 uci_foreach_element(&p->delta, e) {
780 uci_lua_add_change(L, e);
782 lua_setfield(L, -2, p->e.name);
790 uci_lua_changes(lua_State *L)
792 struct uci_context *ctx;
793 const char *package = NULL;
794 char **config = NULL;
798 ctx = find_context(L, &offset);
799 nargs = lua_gettop(L);
800 switch(nargs - offset) {
802 package = luaL_checkstring(L, 1 + offset);
806 return luaL_error(L, "invalid argument count");
811 uci_lua_changes_pkg(L, ctx, package);
813 if (uci_list_configs(ctx, &config) != 0)
816 for(i = 0; config[i] != NULL; i++) {
817 uci_lua_changes_pkg(L, ctx, config[i]);
826 uci_lua_get_confdir(lua_State *L)
828 struct uci_context *ctx = find_context(L, NULL);
829 lua_pushstring(L, ctx->confdir);
834 uci_lua_set_confdir(lua_State *L)
836 struct uci_context *ctx;
839 ctx = find_context(L, &offset);
840 luaL_checkstring(L, 1 + offset);
841 uci_set_confdir(ctx, lua_tostring(L, -1));
842 return uci_push_status(L, ctx, false);
846 uci_lua_get_savedir(lua_State *L)
848 struct uci_context *ctx = find_context(L, NULL);
849 lua_pushstring(L, ctx->savedir);
854 uci_lua_add_delta(lua_State *L)
856 struct uci_context *ctx;
859 ctx = find_context(L, &offset);
860 luaL_checkstring(L, 1 + offset);
861 uci_add_delta_path(ctx, lua_tostring(L, -1));
862 return uci_push_status(L, ctx, false);
866 uci_lua_load_plugins(lua_State *L)
868 struct uci_context *ctx;
870 const char *str = NULL;
872 ctx = find_context(L, &offset);
873 if (lua_isstring(L, -1))
874 str = lua_tostring(L, -1);
875 uci_load_plugins(ctx, str);
876 return uci_push_status(L, ctx, false);
880 uci_lua_set_savedir(lua_State *L)
882 struct uci_context *ctx;
885 ctx = find_context(L, &offset);
886 luaL_checkstring(L, 1 + offset);
887 uci_set_savedir(ctx, lua_tostring(L, -1));
888 return uci_push_status(L, ctx, false);
892 uci_lua_gc(lua_State *L)
894 struct uci_context *ctx = find_context(L, NULL);
895 uci_free_context(ctx);
900 uci_lua_cursor(lua_State *L)
902 struct uci_context **u;
903 int argc = lua_gettop(L);
905 u = lua_newuserdata(L, sizeof(struct uci_context *));
906 luaL_getmetatable(L, METANAME);
907 lua_setmetatable(L, -2);
909 *u = uci_alloc_context();
911 return luaL_error(L, "Cannot allocate UCI context");
914 if (lua_isstring(L, 2) &&
915 (uci_set_savedir(*u, luaL_checkstring(L, 2)) != UCI_OK))
916 return luaL_error(L, "Unable to set savedir");
919 if (lua_isstring(L, 1) &&
920 (uci_set_confdir(*u, luaL_checkstring(L, 1)) != UCI_OK))
921 return luaL_error(L, "Unable to set savedir");
929 static const luaL_Reg uci[] = {
930 { "__gc", uci_lua_gc },
931 { "cursor", uci_lua_cursor },
932 { "load", uci_lua_load },
933 { "unload", uci_lua_unload },
934 { "get", uci_lua_get },
935 { "get_all", uci_lua_get_all },
936 { "add", uci_lua_add },
937 { "set", uci_lua_set },
938 { "rename", uci_lua_rename },
939 { "save", uci_lua_save },
940 { "delete", uci_lua_delete },
941 { "commit", uci_lua_commit },
942 { "revert", uci_lua_revert },
943 { "reorder", uci_lua_reorder },
944 { "changes", uci_lua_changes },
945 { "foreach", uci_lua_foreach },
946 { "add_history", uci_lua_add_delta },
947 { "add_delta", uci_lua_add_delta },
948 { "load_plugins", uci_lua_load_plugins },
949 { "get_confdir", uci_lua_get_confdir },
950 { "set_confdir", uci_lua_set_confdir },
951 { "get_savedir", uci_lua_get_savedir },
952 { "set_savedir", uci_lua_set_savedir },
958 luaopen_uci(lua_State *L)
960 /* create metatable */
961 luaL_newmetatable(L, METANAME);
963 /* metatable.__index = metatable */
964 lua_pushvalue(L, -1);
965 lua_setfield(L, -2, "__index");
968 luaL_register(L, NULL, uci);
972 luaL_register(L, MODNAME, uci);