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);
377 return uci_push_status(L, ctx, true);
381 uci_lua_get(lua_State *L)
383 return uci_lua_get_any(L, false);
387 uci_lua_get_all(lua_State *L)
389 return uci_lua_get_any(L, true);
393 uci_lua_add(lua_State *L)
395 struct uci_context *ctx;
396 struct uci_section *s = NULL;
397 struct uci_package *p;
400 const char *name = NULL;
403 ctx = find_context(L, &offset);
404 package = luaL_checkstring(L, 1 + offset);
405 type = luaL_checkstring(L, 2 + offset);
406 p = find_package(L, ctx, package, true);
410 if (uci_add_section(ctx, p, type, &s) || !s)
414 lua_pushstring(L, name);
419 return uci_push_status(L, ctx, true);
423 uci_lua_delete(lua_State *L)
425 struct uci_context *ctx;
430 ctx = find_context(L, &offset);
432 if (lookup_args(L, ctx, offset, &ptr, &s))
435 uci_delete(ctx, &ptr);
440 return uci_push_status(L, ctx, false);
444 uci_lua_rename(lua_State *L)
446 struct uci_context *ctx;
448 int err = UCI_ERR_MEM;
450 int nargs, offset = 0;
452 ctx = find_context(L, &offset);
453 nargs = lua_gettop(L);
454 if (lookup_args(L, ctx, offset, &ptr, &s))
457 switch(nargs - offset) {
459 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
462 /* Format: uci.set("p", "s", "o", "v") */
463 ptr.value = luaL_checkstring(L, nargs);
466 /* Format: uci.set("p", "s", "v") */
467 ptr.value = ptr.option;
475 err = uci_lookup_ptr(ctx, &ptr, NULL, true);
479 if (((ptr.s == NULL) && (ptr.option != NULL)) || (ptr.value == NULL)) {
484 err = uci_rename(ctx, &ptr);
491 return uci_push_status(L, ctx, false);
495 uci_lua_reorder(lua_State *L)
497 struct uci_context *ctx;
499 int err = UCI_ERR_MEM;
501 int nargs, offset = 0;
503 ctx = find_context(L, &offset);
504 nargs = lua_gettop(L);
505 if (lookup_args(L, ctx, offset, &ptr, &s))
508 switch(nargs - offset) {
510 /* Format: uci.set("p.s=v") or uci.set("p.s=v") */
517 /* Format: uci.set("p", "s", "v") */
518 ptr.value = ptr.option;
526 err = uci_lookup_ptr(ctx, &ptr, NULL, true);
530 if ((ptr.s == NULL) || (ptr.value == NULL)) {
535 err = uci_reorder_section(ctx, ptr.s, strtoul(ptr.value, NULL, 10));
542 return uci_push_status(L, ctx, false);
547 uci_lua_set(lua_State *L)
549 struct uci_context *ctx;
551 bool istable = false;
552 int err = UCI_ERR_MEM;
554 int i, nargs, offset = 0;
556 ctx = find_context(L, &offset);
557 nargs = lua_gettop(L);
558 if (lookup_args(L, ctx, offset, &ptr, &s))
561 switch(nargs - offset) {
563 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
566 /* Format: uci.set("p", "s", "o", "v") */
567 if (lua_istable(L, nargs)) {
568 if (lua_objlen(L, nargs) < 1)
569 return luaL_error(L, "Cannot set an uci option to an empty table value");
570 lua_rawgeti(L, nargs, 1);
571 ptr.value = luaL_checkstring(L, -1);
575 ptr.value = luaL_checkstring(L, nargs);
579 /* Format: uci.set("p", "s", "v") */
580 ptr.value = ptr.option;
588 err = uci_lookup_ptr(ctx, &ptr, NULL, true);
592 if (((ptr.s == NULL) && (ptr.option != NULL)) || (ptr.value == NULL)) {
598 if (lua_objlen(L, nargs) == 1) {
601 err = uci_delete(ctx, &ptr);
604 err = uci_set(ctx, &ptr);
609 for (; i <= lua_objlen(L, nargs); i++) {
610 lua_rawgeti(L, nargs, i);
611 ptr.value = luaL_checkstring(L, -1);
612 err = uci_add_list(ctx, &ptr);
618 err = uci_set(ctx, &ptr);
627 return uci_push_status(L, ctx, false);
637 uci_lua_package_cmd(lua_State *L, enum pkg_cmd cmd)
639 struct uci_context *ctx;
640 struct uci_element *e, *tmp;
643 int nargs, offset = 0;
645 ctx = find_context(L, &offset);
646 nargs = lua_gettop(L);
647 if ((cmd != CMD_REVERT) && (nargs - offset > 1))
650 if (lookup_args(L, ctx, offset, &ptr, &s))
653 uci_lookup_ptr(ctx, &ptr, NULL, true);
655 uci_foreach_element_safe(&ctx->root, tmp, e) {
656 struct uci_package *p = uci_to_package(e);
658 if (ptr.p && (ptr.p != p))
664 uci_commit(ctx, &p, false);
670 uci_revert(ctx, &ptr);
678 return uci_push_status(L, ctx, false);
682 uci_lua_save(lua_State *L)
684 return uci_lua_package_cmd(L, CMD_SAVE);
688 uci_lua_commit(lua_State *L)
690 return uci_lua_package_cmd(L, CMD_COMMIT);
694 uci_lua_revert(lua_State *L)
696 return uci_lua_package_cmd(L, CMD_REVERT);
700 uci_lua_add_change(lua_State *L, struct uci_element *e)
710 lua_getfield(L, -1, h->section);
711 if (lua_isnil(L, -1)) {
714 lua_pushvalue(L, -1); /* copy for setfield */
715 lua_setfield(L, -3, h->section);
719 value = h->value ? h->value : "";
722 lua_getfield(L, -1, name);
724 /* this delta is a list add operation */
725 if (h->cmd == UCI_CMD_LIST_ADD) {
726 /* there seems to be no table yet */
727 if (!lua_istable(L, -1)) {
730 /* if there is a value on the stack already, add */
731 if (!lua_isnil(L, -2)) {
732 lua_pushvalue(L, -2);
733 lua_rawseti(L, -2, 1);
734 lua_pushstring(L, value);
735 lua_rawseti(L, -2, 2);
737 /* this is the first table item */
739 lua_pushstring(L, value);
740 lua_rawseti(L, -2, 1);
743 lua_setfield(L, -3, name);
745 /* a table is on the top of the stack and this is a subsequent,
746 * list_add, append this value to table */
748 lua_pushstring(L, value);
749 lua_rawseti(L, -2, lua_objlen(L, -2) + 1);
752 /* non-list change, simply set/replace field */
754 lua_pushstring(L, value);
755 lua_setfield(L, -3, name);
760 lua_pushstring(L, value);
761 lua_setfield(L, -2, ".type");
768 uci_lua_changes_pkg(lua_State *L, struct uci_context *ctx, const char *package)
770 struct uci_package *p = NULL;
771 struct uci_element *e;
772 bool autoload = false;
774 p = find_package(L, ctx, package, false);
777 p = find_package(L, ctx, package, true);
782 if (uci_list_empty(&p->delta) && uci_list_empty(&p->saved_delta))
786 uci_foreach_element(&p->saved_delta, e) {
787 uci_lua_add_change(L, e);
789 uci_foreach_element(&p->delta, e) {
790 uci_lua_add_change(L, e);
792 lua_setfield(L, -2, p->e.name);
800 uci_lua_changes(lua_State *L)
802 struct uci_context *ctx;
803 const char *package = NULL;
804 char **config = NULL;
808 ctx = find_context(L, &offset);
809 nargs = lua_gettop(L);
810 switch(nargs - offset) {
812 package = luaL_checkstring(L, 1 + offset);
816 return luaL_error(L, "invalid argument count");
821 uci_lua_changes_pkg(L, ctx, package);
823 if (uci_list_configs(ctx, &config) != 0)
826 for(i = 0; config[i] != NULL; i++) {
827 uci_lua_changes_pkg(L, ctx, config[i]);
836 uci_lua_get_confdir(lua_State *L)
838 struct uci_context *ctx = find_context(L, NULL);
839 lua_pushstring(L, ctx->confdir);
844 uci_lua_set_confdir(lua_State *L)
846 struct uci_context *ctx;
849 ctx = find_context(L, &offset);
850 luaL_checkstring(L, 1 + offset);
851 uci_set_confdir(ctx, lua_tostring(L, -1));
852 return uci_push_status(L, ctx, false);
856 uci_lua_get_savedir(lua_State *L)
858 struct uci_context *ctx = find_context(L, NULL);
859 lua_pushstring(L, ctx->savedir);
864 uci_lua_add_delta(lua_State *L)
866 struct uci_context *ctx;
869 ctx = find_context(L, &offset);
870 luaL_checkstring(L, 1 + offset);
871 uci_add_delta_path(ctx, lua_tostring(L, -1));
872 return uci_push_status(L, ctx, false);
876 uci_lua_set_savedir(lua_State *L)
878 struct uci_context *ctx;
881 ctx = find_context(L, &offset);
882 luaL_checkstring(L, 1 + offset);
883 uci_set_savedir(ctx, lua_tostring(L, -1));
884 return uci_push_status(L, ctx, false);
888 uci_lua_gc(lua_State *L)
890 struct uci_context *ctx = find_context(L, NULL);
891 uci_free_context(ctx);
896 uci_lua_cursor(lua_State *L)
898 struct uci_context **u;
899 int argc = lua_gettop(L);
901 u = lua_newuserdata(L, sizeof(struct uci_context *));
902 luaL_getmetatable(L, METANAME);
903 lua_setmetatable(L, -2);
905 *u = uci_alloc_context();
907 return luaL_error(L, "Cannot allocate UCI context");
910 if (lua_isstring(L, 2) &&
911 (uci_set_savedir(*u, luaL_checkstring(L, 2)) != UCI_OK))
912 return luaL_error(L, "Unable to set savedir");
915 if (lua_isstring(L, 1) &&
916 (uci_set_confdir(*u, luaL_checkstring(L, 1)) != UCI_OK))
917 return luaL_error(L, "Unable to set savedir");
925 static const luaL_Reg uci[] = {
926 { "__gc", uci_lua_gc },
927 { "cursor", uci_lua_cursor },
928 { "load", uci_lua_load },
929 { "unload", uci_lua_unload },
930 { "get", uci_lua_get },
931 { "get_all", uci_lua_get_all },
932 { "add", uci_lua_add },
933 { "set", uci_lua_set },
934 { "rename", uci_lua_rename },
935 { "save", uci_lua_save },
936 { "delete", uci_lua_delete },
937 { "commit", uci_lua_commit },
938 { "revert", uci_lua_revert },
939 { "reorder", uci_lua_reorder },
940 { "changes", uci_lua_changes },
941 { "foreach", uci_lua_foreach },
942 { "add_history", uci_lua_add_delta },
943 { "add_delta", uci_lua_add_delta },
944 { "get_confdir", uci_lua_get_confdir },
945 { "set_confdir", uci_lua_set_confdir },
946 { "get_savedir", uci_lua_get_savedir },
947 { "set_savedir", uci_lua_set_savedir },
953 luaopen_uci(lua_State *L)
955 /* create metatable */
956 luaL_newmetatable(L, METANAME);
958 /* metatable.__index = metatable */
959 lua_pushvalue(L, -1);
960 lua_setfield(L, -2, "__index");
963 luaL_register(L, NULL, uci);
967 luaL_register(L, MODNAME, uci);