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, true) != UCI_OK)
128 if (uci_lookup_ptr(ctx, ptr, s, true) != 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, *tmp;
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_safe(&p->sections, tmp, 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))
313 lua_pushboolean(L, ret);
318 uci_lua_get_any(lua_State *L, bool all)
320 struct uci_context *ctx;
321 struct uci_element *e = NULL;
325 int err = UCI_ERR_NOTFOUND;
327 ctx = find_context(L, &offset);
329 if (lookup_args(L, ctx, offset, &ptr, &s))
332 uci_lookup_ptr(ctx, &ptr, NULL, true);
333 if (!all && !ptr.s) {
337 if (!(ptr.flags & UCI_LOOKUP_COMPLETE)) {
338 err = UCI_ERR_NOTFOUND;
345 case UCI_TYPE_PACKAGE:
346 uci_push_package(L, ptr.p);
348 case UCI_TYPE_SECTION:
350 uci_push_section(L, ptr.s, -1);
352 lua_pushstring(L, ptr.s->type);
354 case UCI_TYPE_OPTION:
355 uci_push_option(L, ptr.o);
369 return uci_push_status(L, ctx, true);
373 uci_lua_get(lua_State *L)
375 return uci_lua_get_any(L, false);
379 uci_lua_get_all(lua_State *L)
381 return uci_lua_get_any(L, true);
385 uci_lua_add(lua_State *L)
387 struct uci_context *ctx;
388 struct uci_section *s = NULL;
389 struct uci_package *p;
392 const char *name = NULL;
395 ctx = find_context(L, &offset);
396 package = luaL_checkstring(L, 1 + offset);
397 type = luaL_checkstring(L, 2 + offset);
398 p = find_package(L, ctx, package, true);
402 if (uci_add_section(ctx, p, type, &s) || !s)
406 lua_pushstring(L, name);
411 return uci_push_status(L, ctx, true);
415 uci_lua_delete(lua_State *L)
417 struct uci_context *ctx;
421 int err = UCI_ERR_NOTFOUND;
423 ctx = find_context(L, &offset);
425 if (lookup_args(L, ctx, offset, &ptr, &s))
428 err = uci_delete(ctx, &ptr);
433 return uci_push_status(L, ctx, false);
437 uci_lua_rename(lua_State *L)
439 struct uci_context *ctx;
441 int err = UCI_ERR_MEM;
443 int nargs, offset = 0;
445 ctx = find_context(L, &offset);
446 nargs = lua_gettop(L);
447 if (lookup_args(L, ctx, offset, &ptr, &s))
450 switch(nargs - offset) {
452 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
455 /* Format: uci.set("p", "s", "o", "v") */
456 ptr.value = luaL_checkstring(L, nargs);
459 /* Format: uci.set("p", "s", "v") */
460 ptr.value = ptr.option;
468 err = uci_lookup_ptr(ctx, &ptr, NULL, true);
472 if (((ptr.s == NULL) && (ptr.option != NULL)) || (ptr.value == NULL)) {
477 err = uci_rename(ctx, &ptr);
482 return uci_push_status(L, ctx, false);
486 uci_lua_reorder(lua_State *L)
488 struct uci_context *ctx;
490 int err = UCI_ERR_MEM;
492 int nargs, offset = 0;
494 ctx = find_context(L, &offset);
495 nargs = lua_gettop(L);
496 if (lookup_args(L, ctx, offset, &ptr, &s))
499 switch(nargs - offset) {
501 /* Format: uci.set("p.s=v") or uci.set("p.s=v") */
508 /* Format: uci.set("p", "s", "v") */
509 ptr.value = ptr.option;
517 err = uci_lookup_ptr(ctx, &ptr, NULL, true);
521 if ((ptr.s == NULL) || (ptr.value == NULL)) {
526 err = uci_reorder_section(ctx, ptr.s, strtoul(ptr.value, NULL, 10));
531 return uci_push_status(L, ctx, false);
536 uci_lua_set(lua_State *L)
538 struct uci_context *ctx;
540 bool istable = false;
541 int err = UCI_ERR_MEM;
543 int i, nargs, offset = 0;
545 ctx = find_context(L, &offset);
546 nargs = lua_gettop(L);
547 if (lookup_args(L, ctx, offset, &ptr, &s))
550 switch(nargs - offset) {
552 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
555 /* Format: uci.set("p", "s", "o", "v") */
556 if (lua_istable(L, nargs)) {
557 if (lua_objlen(L, nargs) < 1)
558 luaL_error(L, "Cannot set an uci option to an empty table value");
559 lua_rawgeti(L, nargs, 1);
560 ptr.value = luaL_checkstring(L, -1);
564 ptr.value = luaL_checkstring(L, nargs);
568 /* Format: uci.set("p", "s", "v") */
569 ptr.value = ptr.option;
577 err = uci_lookup_ptr(ctx, &ptr, NULL, true);
581 if (((ptr.s == NULL) && (ptr.option != NULL)) || (ptr.value == NULL)) {
587 if (lua_objlen(L, nargs) == 1) {
590 err = uci_delete(ctx, &ptr);
593 err = uci_set(ctx, &ptr);
598 for (; i <= lua_objlen(L, nargs); i++) {
599 lua_rawgeti(L, nargs, i);
600 ptr.value = luaL_checkstring(L, -1);
601 err = uci_add_list(ctx, &ptr);
607 err = uci_set(ctx, &ptr);
614 return uci_push_status(L, ctx, false);
624 uci_lua_package_cmd(lua_State *L, enum pkg_cmd cmd)
626 struct uci_context *ctx;
627 struct uci_element *e, *tmp;
631 int nargs, offset = 0;
633 ctx = find_context(L, &offset);
634 nargs = lua_gettop(L);
635 if ((cmd != CMD_REVERT) && (nargs - offset > 1))
638 if (lookup_args(L, ctx, offset, &ptr, &s))
641 uci_lookup_ptr(ctx, &ptr, NULL, true);
643 uci_foreach_element_safe(&ctx->root, tmp, e) {
644 struct uci_package *p = uci_to_package(e);
645 int ret = UCI_ERR_INVAL;
647 if (ptr.p && (ptr.p != p))
653 ret = uci_commit(ctx, &p, false);
656 ret = uci_save(ctx, p);
659 ret = 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)
699 lua_getfield(L, -1, h->section);
700 if (lua_isnil(L, -1)) {
703 lua_pushvalue(L, -1); /* copy for setfield */
704 lua_setfield(L, -3, h->section);
707 name = (h->e.name ? h->e.name : ".type");
709 lua_pushstring(L, h->value);
711 lua_pushstring(L, "");
712 lua_setfield(L, -2, name);
717 uci_lua_changes_pkg(lua_State *L, struct uci_context *ctx, const char *package)
719 struct uci_package *p = NULL;
720 struct uci_element *e;
721 bool autoload = false;
723 p = find_package(L, ctx, package, false);
726 p = find_package(L, ctx, package, true);
731 if (uci_list_empty(&p->delta) && uci_list_empty(&p->saved_delta))
735 uci_foreach_element(&p->saved_delta, e) {
736 uci_lua_add_change(L, e);
738 uci_foreach_element(&p->delta, e) {
739 uci_lua_add_change(L, e);
741 lua_setfield(L, -2, p->e.name);
749 uci_lua_changes(lua_State *L)
751 struct uci_context *ctx;
752 const char *package = NULL;
753 char **config = NULL;
757 ctx = find_context(L, &offset);
758 nargs = lua_gettop(L);
759 switch(nargs - offset) {
761 package = luaL_checkstring(L, 1 + offset);
765 luaL_error(L, "invalid argument count");
770 uci_lua_changes_pkg(L, ctx, package);
772 if (uci_list_configs(ctx, &config) != 0)
775 for(i = 0; config[i] != NULL; i++) {
776 uci_lua_changes_pkg(L, ctx, config[i]);
785 uci_lua_get_confdir(lua_State *L)
787 struct uci_context *ctx = find_context(L, NULL);
788 lua_pushstring(L, ctx->confdir);
793 uci_lua_set_confdir(lua_State *L)
795 struct uci_context *ctx;
798 ctx = find_context(L, &offset);
799 luaL_checkstring(L, 1 + offset);
800 ret = uci_set_confdir(ctx, lua_tostring(L, -1));
801 return uci_push_status(L, ctx, false);
805 uci_lua_get_savedir(lua_State *L)
807 struct uci_context *ctx = find_context(L, NULL);
808 lua_pushstring(L, ctx->savedir);
813 uci_lua_add_delta(lua_State *L)
815 struct uci_context *ctx;
818 ctx = find_context(L, &offset);
819 luaL_checkstring(L, 1 + offset);
820 ret = uci_add_delta_path(ctx, lua_tostring(L, -1));
821 return uci_push_status(L, ctx, false);
825 uci_lua_load_plugins(lua_State *L)
827 struct uci_context *ctx;
829 const char *str = NULL;
831 ctx = find_context(L, &offset);
832 if (lua_isstring(L, -1))
833 str = lua_tostring(L, -1);
834 ret = uci_load_plugins(ctx, str);
835 return uci_push_status(L, ctx, false);
839 uci_lua_set_savedir(lua_State *L)
841 struct uci_context *ctx;
844 ctx = find_context(L, &offset);
845 luaL_checkstring(L, 1 + offset);
846 ret = uci_set_savedir(ctx, lua_tostring(L, -1));
847 return uci_push_status(L, ctx, false);
851 uci_lua_gc(lua_State *L)
853 struct uci_context *ctx = find_context(L, NULL);
854 uci_free_context(ctx);
859 uci_lua_cursor(lua_State *L)
861 struct uci_context **u;
862 int argc = lua_gettop(L);
864 u = lua_newuserdata(L, sizeof(struct uci_context *));
865 luaL_getmetatable(L, METANAME);
866 lua_setmetatable(L, -2);
868 *u = uci_alloc_context();
870 luaL_error(L, "Cannot allocate UCI context");
873 if (lua_isstring(L, 2) &&
874 (uci_set_savedir(*u, luaL_checkstring(L, 2)) != UCI_OK))
875 luaL_error(L, "Unable to set savedir");
878 if (lua_isstring(L, 1) &&
879 (uci_set_confdir(*u, luaL_checkstring(L, 1)) != UCI_OK))
880 luaL_error(L, "Unable to set savedir");
888 static const luaL_Reg uci[] = {
889 { "__gc", uci_lua_gc },
890 { "cursor", uci_lua_cursor },
891 { "load", uci_lua_load },
892 { "unload", uci_lua_unload },
893 { "get", uci_lua_get },
894 { "get_all", uci_lua_get_all },
895 { "add", uci_lua_add },
896 { "set", uci_lua_set },
897 { "rename", uci_lua_rename },
898 { "save", uci_lua_save },
899 { "delete", uci_lua_delete },
900 { "commit", uci_lua_commit },
901 { "revert", uci_lua_revert },
902 { "reorder", uci_lua_reorder },
903 { "changes", uci_lua_changes },
904 { "foreach", uci_lua_foreach },
905 { "add_history", uci_lua_add_delta },
906 { "add_delta", uci_lua_add_delta },
907 { "load_plugins", uci_lua_load_plugins },
908 { "get_confdir", uci_lua_get_confdir },
909 { "set_confdir", uci_lua_set_confdir },
910 { "get_savedir", uci_lua_get_savedir },
911 { "set_savedir", uci_lua_set_savedir },
917 luaopen_uci(lua_State *L)
919 /* create metatable */
920 luaL_newmetatable(L, METANAME);
922 /* metatable.__index = metatable */
923 lua_pushvalue(L, -1);
924 lua_setfield(L, -2, "__index");
927 luaL_register(L, NULL, uci);
931 luaL_register(L, MODNAME, uci);