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");
55 ctx = luaL_checkudata(L, 1, METANAME);
57 luaL_error(L, "failed to get UCI context");
62 static struct uci_package *
63 find_package(lua_State *L, struct uci_context *ctx, const char *str, bool al)
65 struct uci_package *p = NULL;
66 struct uci_element *e;
70 sep = strchr(str, '.');
72 name = malloc(1 + sep - str);
74 luaL_error(L, "out of memory");
75 strncpy(name, str, sep - str);
80 uci_foreach_element(&ctx->root, e) {
81 if (strcmp(e->name, name) != 0)
84 p = uci_to_package(e);
89 uci_load(ctx, name, &p);
91 uci_load(ctx, name, &p);
101 lookup_args(lua_State *L, struct uci_context *ctx, int offset, struct uci_ptr *ptr, char **buf)
107 luaL_checkstring(L, 1 + offset);
108 s = strdup(lua_tostring(L, 1 + offset));
112 memset(ptr, 0, sizeof(struct uci_ptr));
113 if (!find_package(L, ctx, s, true))
116 switch (n - offset) {
119 ptr->option = luaL_checkstring(L, 3 + offset);
122 ptr->section = luaL_checkstring(L, 2 + offset);
123 ptr->package = luaL_checkstring(L, 1 + offset);
124 if (uci_lookup_ptr(ctx, ptr, NULL, false) != UCI_OK)
128 if (uci_lookup_ptr(ctx, ptr, s, false) != UCI_OK)
132 luaL_error(L, "invalid argument count");
146 uci_push_status(lua_State *L, struct uci_context *ctx, bool hasarg)
151 lua_pushboolean(L, (ctx->err == UCI_OK));
153 uci_get_errorstr(ctx, &str, MODNAME);
155 lua_pushstring(L, str);
164 uci_push_option(lua_State *L, struct uci_option *o)
166 struct uci_element *e;
170 case UCI_TYPE_STRING:
171 lua_pushstring(L, o->v.string);
175 uci_foreach_element(&o->v.list, e) {
177 lua_pushstring(L, e->name);
178 lua_rawseti(L, -2, i);
188 uci_push_section(lua_State *L, struct uci_section *s, int index)
190 struct uci_element *e;
193 lua_pushboolean(L, s->anonymous);
194 lua_setfield(L, -2, ".anonymous");
195 lua_pushstring(L, s->type);
196 lua_setfield(L, -2, ".type");
197 lua_pushstring(L, s->e.name);
198 lua_setfield(L, -2, ".name");
200 lua_pushinteger(L, index);
201 lua_setfield(L, -2, ".index");
204 uci_foreach_element(&s->options, e) {
205 struct uci_option *o = uci_to_option(e);
206 uci_push_option(L, o);
207 lua_setfield(L, -2, o->e.name);
212 uci_push_package(lua_State *L, struct uci_package *p)
214 struct uci_element *e;
218 uci_foreach_element(&p->sections, e) {
219 uci_push_section(L, uci_to_section(e), i);
220 lua_setfield(L, -2, e->name);
226 uci_lua_unload(lua_State *L)
228 struct uci_context *ctx;
229 struct uci_package *p;
233 ctx = find_context(L, &offset);
234 luaL_checkstring(L, 1 + offset);
235 s = lua_tostring(L, 1 + offset);
236 p = find_package(L, ctx, s, false);
239 return uci_push_status(L, ctx, false);
241 lua_pushboolean(L, 0);
247 uci_lua_load(lua_State *L)
249 struct uci_context *ctx;
250 struct uci_package *p = NULL;
254 ctx = find_context(L, &offset);
256 lua_pop(L, 1); /* bool ret value of unload */
257 s = lua_tostring(L, -1);
259 uci_load(ctx, s, &p);
260 return uci_push_status(L, ctx, false);
265 uci_lua_foreach(lua_State *L)
267 struct uci_context *ctx;
268 struct uci_package *p;
269 struct uci_element *e;
270 const char *package, *type;
275 ctx = find_context(L, &offset);
276 package = luaL_checkstring(L, 1 + offset);
281 type = luaL_checkstring(L, 2 + offset);
283 if (!lua_isfunction(L, 3 + offset) || !package)
284 luaL_error(L, "Invalid argument");
286 p = find_package(L, ctx, package, true);
290 uci_foreach_element(&p->sections, e) {
291 struct uci_section *s = uci_to_section(e);
295 if (type && (strcmp(s->type, type) != 0))
298 lua_pushvalue(L, 3 + offset); /* iterator function */
299 uci_push_section(L, s, i - 1);
300 if (lua_pcall(L, 1, 1, 0) == 0) {
302 if (lua_isboolean(L, -1) && !lua_toboolean(L, -1))
308 lua_pushboolean(L, ret);
313 uci_lua_get_any(lua_State *L, bool all)
315 struct uci_context *ctx;
316 struct uci_element *e = NULL;
320 int err = UCI_ERR_NOTFOUND;
322 ctx = find_context(L, &offset);
324 if (lookup_args(L, ctx, offset, &ptr, &s))
327 uci_lookup_ptr(ctx, &ptr, NULL, false);
328 if (!all && !ptr.s) {
332 if (!(ptr.flags & UCI_LOOKUP_COMPLETE)) {
333 err = UCI_ERR_NOTFOUND;
340 case UCI_TYPE_PACKAGE:
341 uci_push_package(L, ptr.p);
343 case UCI_TYPE_SECTION:
345 uci_push_section(L, ptr.s, -1);
347 lua_pushstring(L, ptr.s->type);
349 case UCI_TYPE_OPTION:
350 uci_push_option(L, ptr.o);
364 return uci_push_status(L, ctx, true);
368 uci_lua_get(lua_State *L)
370 return uci_lua_get_any(L, false);
374 uci_lua_get_all(lua_State *L)
376 return uci_lua_get_any(L, true);
380 uci_lua_add(lua_State *L)
382 struct uci_context *ctx;
383 struct uci_section *s = NULL;
384 struct uci_package *p;
387 const char *name = NULL;
390 ctx = find_context(L, &offset);
391 package = luaL_checkstring(L, 1 + offset);
392 type = luaL_checkstring(L, 2 + offset);
393 p = find_package(L, ctx, package, true);
397 if (uci_add_section(ctx, p, type, &s) || !s)
401 lua_pushstring(L, name);
406 return uci_push_status(L, ctx, true);
410 uci_lua_delete(lua_State *L)
412 struct uci_context *ctx;
416 int err = UCI_ERR_NOTFOUND;
418 ctx = find_context(L, &offset);
420 if (lookup_args(L, ctx, offset, &ptr, &s))
423 err = uci_delete(ctx, &ptr);
428 return uci_push_status(L, ctx, false);
432 uci_lua_rename(lua_State *L)
434 struct uci_context *ctx;
436 int err = UCI_ERR_MEM;
438 int nargs, offset = 0;
440 ctx = find_context(L, &offset);
441 nargs = lua_gettop(L);
442 if (lookup_args(L, ctx, offset, &ptr, &s))
445 switch(nargs - offset) {
447 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
450 /* Format: uci.set("p", "s", "o", "v") */
451 ptr.value = luaL_checkstring(L, nargs);
454 /* Format: uci.set("p", "s", "v") */
455 ptr.value = ptr.option;
463 err = uci_lookup_ptr(ctx, &ptr, NULL, false);
467 if (((ptr.s == NULL) && (ptr.option != NULL)) || (ptr.value == NULL)) {
472 err = uci_rename(ctx, &ptr);
477 return uci_push_status(L, ctx, false);
481 uci_lua_reorder(lua_State *L)
483 struct uci_context *ctx;
485 int err = UCI_ERR_MEM;
487 int nargs, offset = 0;
489 ctx = find_context(L, &offset);
490 nargs = lua_gettop(L);
491 if (lookup_args(L, ctx, offset, &ptr, &s))
494 switch(nargs - offset) {
496 /* Format: uci.set("p.s=v") or uci.set("p.s=v") */
503 /* Format: uci.set("p", "s", "v") */
504 ptr.value = ptr.option;
512 err = uci_lookup_ptr(ctx, &ptr, NULL, false);
516 if ((ptr.s == NULL) || (ptr.value == NULL)) {
521 err = uci_reorder_section(ctx, ptr.s, strtoul(ptr.value, NULL, 10));
526 return uci_push_status(L, ctx, false);
531 uci_lua_set(lua_State *L)
533 struct uci_context *ctx;
535 bool istable = false;
536 int err = UCI_ERR_MEM;
538 int i, nargs, offset = 0;
540 ctx = find_context(L, &offset);
541 nargs = lua_gettop(L);
542 if (lookup_args(L, ctx, offset, &ptr, &s))
545 switch(nargs - offset) {
547 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
550 /* Format: uci.set("p", "s", "o", "v") */
551 if (lua_istable(L, nargs)) {
552 if (lua_objlen(L, nargs) < 1)
553 luaL_error(L, "Cannot set an uci option to an empty table value");
554 lua_rawgeti(L, nargs, 1);
555 ptr.value = luaL_checkstring(L, -1);
559 ptr.value = luaL_checkstring(L, nargs);
563 /* Format: uci.set("p", "s", "v") */
564 ptr.value = ptr.option;
572 err = uci_lookup_ptr(ctx, &ptr, NULL, false);
576 if (((ptr.s == NULL) && (ptr.option != NULL)) || (ptr.value == NULL)) {
582 if (lua_objlen(L, nargs) == 1) {
585 err = uci_delete(ctx, &ptr);
588 err = uci_set(ctx, &ptr);
593 for (; i <= lua_objlen(L, nargs); i++) {
594 lua_rawgeti(L, nargs, i);
595 ptr.value = luaL_checkstring(L, -1);
596 err = uci_add_list(ctx, &ptr);
602 err = uci_set(ctx, &ptr);
609 return uci_push_status(L, ctx, false);
619 uci_lua_package_cmd(lua_State *L, enum pkg_cmd cmd)
621 struct uci_context *ctx;
622 struct uci_element *e, *tmp;
626 int nargs, offset = 0;
628 ctx = find_context(L, &offset);
629 nargs = lua_gettop(L);
630 if ((cmd != CMD_REVERT) && (nargs - offset > 1))
633 if (lookup_args(L, ctx, offset, &ptr, &s))
636 uci_lookup_ptr(ctx, &ptr, NULL, false);
638 uci_foreach_element_safe(&ctx->root, tmp, e) {
639 struct uci_package *p = uci_to_package(e);
640 int ret = UCI_ERR_INVAL;
642 if (ptr.p && (ptr.p != p))
648 ret = uci_commit(ctx, &p, false);
651 ret = uci_save(ctx, p);
654 ret = uci_revert(ctx, &ptr);
663 return uci_push_status(L, ctx, false);
667 uci_lua_save(lua_State *L)
669 return uci_lua_package_cmd(L, CMD_SAVE);
673 uci_lua_commit(lua_State *L)
675 return uci_lua_package_cmd(L, CMD_COMMIT);
679 uci_lua_revert(lua_State *L)
681 return uci_lua_package_cmd(L, CMD_REVERT);
685 uci_lua_add_change(lua_State *L, struct uci_element *e)
687 struct uci_history *h;
690 h = uci_to_history(e);
694 lua_getfield(L, -1, h->section);
695 if (lua_isnil(L, -1)) {
698 lua_pushvalue(L, -1); /* copy for setfield */
699 lua_setfield(L, -3, h->section);
702 name = (h->e.name ? h->e.name : ".type");
704 lua_pushstring(L, h->value);
706 lua_pushstring(L, "");
707 lua_setfield(L, -2, name);
712 uci_lua_changes_pkg(lua_State *L, struct uci_context *ctx, const char *package)
714 struct uci_package *p = NULL;
715 struct uci_element *e;
716 bool autoload = false;
718 p = find_package(L, ctx, package, false);
721 p = find_package(L, ctx, package, true);
726 if (uci_list_empty(&p->history) && uci_list_empty(&p->saved_history))
730 uci_foreach_element(&p->saved_history, e) {
731 uci_lua_add_change(L, e);
733 uci_foreach_element(&p->history, e) {
734 uci_lua_add_change(L, e);
736 lua_setfield(L, -2, p->e.name);
744 uci_lua_changes(lua_State *L)
746 struct uci_context *ctx;
747 const char *package = NULL;
748 char **config = NULL;
752 ctx = find_context(L, &offset);
753 nargs = lua_gettop(L);
754 switch(nargs - offset) {
756 package = luaL_checkstring(L, 1 + offset);
760 luaL_error(L, "invalid argument count");
765 uci_lua_changes_pkg(L, ctx, package);
767 if (uci_list_configs(ctx, &config) != 0)
770 for(i = 0; config[i] != NULL; i++) {
771 uci_lua_changes_pkg(L, ctx, config[i]);
780 uci_lua_get_confdir(lua_State *L)
782 struct uci_context *ctx = find_context(L, NULL);
783 lua_pushstring(L, ctx->confdir);
788 uci_lua_set_confdir(lua_State *L)
790 struct uci_context *ctx;
793 ctx = find_context(L, &offset);
794 luaL_checkstring(L, 1 + offset);
795 ret = uci_set_confdir(ctx, lua_tostring(L, -1));
796 return uci_push_status(L, ctx, false);
800 uci_lua_get_savedir(lua_State *L)
802 struct uci_context *ctx = find_context(L, NULL);
803 lua_pushstring(L, ctx->savedir);
808 uci_lua_add_history(lua_State *L)
810 struct uci_context *ctx;
813 ctx = find_context(L, &offset);
814 luaL_checkstring(L, 1 + offset);
815 ret = uci_add_history_path(ctx, lua_tostring(L, -1));
816 return uci_push_status(L, ctx, false);
820 uci_lua_load_plugins(lua_State *L)
822 struct uci_context *ctx;
824 const char *str = NULL;
826 ctx = find_context(L, &offset);
827 if (lua_isstring(L, -1))
828 str = lua_tostring(L, -1);
829 ret = uci_load_plugins(ctx, str);
830 return uci_push_status(L, ctx, false);
834 uci_lua_set_savedir(lua_State *L)
836 struct uci_context *ctx;
839 ctx = find_context(L, &offset);
840 luaL_checkstring(L, 1 + offset);
841 ret = uci_set_savedir(ctx, lua_tostring(L, -1));
842 return uci_push_status(L, ctx, false);
846 uci_lua_gc(lua_State *L)
848 struct uci_context *ctx = find_context(L, NULL);
849 uci_free_context(ctx);
854 uci_lua_cursor(lua_State *L)
856 struct uci_context **u;
857 int argc = lua_gettop(L);
859 u = lua_newuserdata(L, sizeof(struct uci_context *));
860 luaL_getmetatable(L, METANAME);
861 lua_setmetatable(L, -2);
863 *u = uci_alloc_context();
865 luaL_error(L, "Cannot allocate UCI context");
868 if (lua_isstring(L, 2) &&
869 (uci_set_savedir(*u, luaL_checkstring(L, 2)) != UCI_OK))
870 luaL_error(L, "Unable to set savedir");
873 if (lua_isstring(L, 1) &&
874 (uci_set_confdir(*u, luaL_checkstring(L, 1)) != UCI_OK))
875 luaL_error(L, "Unable to set savedir");
883 static const luaL_Reg uci[] = {
884 { "__gc", uci_lua_gc },
885 { "cursor", uci_lua_cursor },
886 { "load", uci_lua_load },
887 { "unload", uci_lua_unload },
888 { "get", uci_lua_get },
889 { "get_all", uci_lua_get_all },
890 { "add", uci_lua_add },
891 { "set", uci_lua_set },
892 { "rename", uci_lua_rename },
893 { "save", uci_lua_save },
894 { "delete", uci_lua_delete },
895 { "commit", uci_lua_commit },
896 { "revert", uci_lua_revert },
897 { "reorder", uci_lua_reorder },
898 { "changes", uci_lua_changes },
899 { "foreach", uci_lua_foreach },
900 { "add_history", uci_lua_add_history },
901 { "load_plugins", uci_lua_load_plugins },
902 { "get_confdir", uci_lua_get_confdir },
903 { "set_confdir", uci_lua_set_confdir },
904 { "get_savedir", uci_lua_get_savedir },
905 { "set_savedir", uci_lua_set_savedir },
911 luaopen_uci(lua_State *L)
913 /* create metatable */
914 luaL_newmetatable(L, METANAME);
916 /* metatable.__index = metatable */
917 lua_pushvalue(L, -1);
918 lua_setfield(L, -2, "__index");
921 luaL_register(L, NULL, uci);
925 luaL_register(L, MODNAME, uci);