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 uci_lua_perror(lua_State
*L
, struct uci_context
*ctx
, char *name
)
103 lua_getfield(L
, LUA_GLOBALSINDEX
, "uci");
104 lua_getfield(L
, -1, "warn");
105 if (!lua_isboolean(L
, -1))
107 if (lua_toboolean(L
, -1) != 1)
109 uci_perror(ctx
, name
);
115 lookup_args(lua_State
*L
, struct uci_context
*ctx
, int offset
, struct uci_ptr
*ptr
, char **buf
)
121 luaL_checkstring(L
, 1 + offset
);
122 s
= strdup(lua_tostring(L
, 1 + offset
));
126 memset(ptr
, 0, sizeof(struct uci_ptr
));
127 if (!find_package(L
, ctx
, s
, true))
130 switch (n
- offset
) {
133 ptr
->option
= luaL_checkstring(L
, 3 + offset
);
136 ptr
->section
= luaL_checkstring(L
, 2 + offset
);
137 ptr
->package
= luaL_checkstring(L
, 1 + offset
);
138 if (uci_lookup_ptr(ctx
, ptr
, NULL
, false) != UCI_OK
)
142 if (uci_lookup_ptr(ctx
, ptr
, s
, false) != UCI_OK
)
146 luaL_error(L
, "invalid argument count");
160 uci_push_option(lua_State
*L
, struct uci_option
*o
)
162 struct uci_element
*e
;
166 case UCI_TYPE_STRING
:
167 lua_pushstring(L
, o
->v
.string
);
171 uci_foreach_element(&o
->v
.list
, e
) {
173 lua_pushstring(L
, e
->name
);
174 lua_rawseti(L
, -2, i
);
184 uci_push_section(lua_State
*L
, struct uci_section
*s
)
186 struct uci_element
*e
;
189 lua_pushboolean(L
, s
->anonymous
);
190 lua_setfield(L
, -2, ".anonymous");
191 lua_pushstring(L
, s
->type
);
192 lua_setfield(L
, -2, ".type");
193 lua_pushstring(L
, s
->e
.name
);
194 lua_setfield(L
, -2, ".name");
196 uci_foreach_element(&s
->options
, e
) {
197 struct uci_option
*o
= uci_to_option(e
);
198 uci_push_option(L
, o
);
199 lua_setfield(L
, -2, o
->e
.name
);
204 uci_push_package(lua_State
*L
, struct uci_package
*p
)
206 struct uci_element
*e
;
210 uci_foreach_element(&p
->sections
, e
) {
212 uci_push_section(L
, uci_to_section(e
));
213 lua_setfield(L
, -2, e
->name
);
218 uci_lua_unload(lua_State
*L
)
220 struct uci_context
*ctx
;
221 struct uci_package
*p
;
225 ctx
= find_context(L
, &offset
);
226 luaL_checkstring(L
, 1 + offset
);
227 s
= lua_tostring(L
, 1 + offset
);
228 p
= find_package(L
, ctx
, s
, false);
231 lua_pushboolean(L
, 1);
233 lua_pushboolean(L
, 0);
239 uci_lua_load(lua_State
*L
)
241 struct uci_context
*ctx
;
242 struct uci_package
*p
= NULL
;
246 ctx
= find_context(L
, &offset
);
248 lua_pop(L
, 1); /* bool ret value of unload */
249 s
= lua_tostring(L
, -1);
251 if (uci_load(ctx
, s
, &p
)) {
252 uci_lua_perror(L
, ctx
, "uci.load");
253 lua_pushboolean(L
, 0);
255 lua_pushboolean(L
, 1);
263 uci_lua_foreach(lua_State
*L
)
265 struct uci_context
*ctx
;
266 struct uci_package
*p
;
267 struct uci_element
*e
;
268 const char *package
, *type
;
272 ctx
= find_context(L
, &offset
);
273 package
= luaL_checkstring(L
, 1 + offset
);
278 type
= luaL_checkstring(L
, 2 + offset
);
280 if (!lua_isfunction(L
, 3 + offset
) || !package
)
281 luaL_error(L
, "Invalid argument");
283 p
= find_package(L
, ctx
, package
, true);
287 uci_foreach_element(&p
->sections
, e
) {
288 struct uci_section
*s
= uci_to_section(e
);
290 if (type
&& (strcmp(s
->type
, type
) != 0))
293 lua_pushvalue(L
, 3 + offset
); /* iterator function */
294 uci_push_section(L
, s
);
295 if (lua_pcall(L
, 1, 0, 0) == 0)
300 lua_pushboolean(L
, ret
);
305 uci_lua_get_any(lua_State
*L
, bool all
)
307 struct uci_context
*ctx
;
308 struct uci_element
*e
= NULL
;
312 int err
= UCI_ERR_NOTFOUND
;
314 ctx
= find_context(L
, &offset
);
316 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
319 uci_lookup_ptr(ctx
, &ptr
, NULL
, false);
320 if (!all
&& !ptr
.s
) {
324 if (!(ptr
.flags
& UCI_LOOKUP_COMPLETE
)) {
325 err
= UCI_ERR_NOTFOUND
;
332 case UCI_TYPE_PACKAGE
:
333 uci_push_package(L
, ptr
.p
);
335 case UCI_TYPE_SECTION
:
337 uci_push_section(L
, ptr
.s
);
339 lua_pushstring(L
, ptr
.s
->type
);
341 case UCI_TYPE_OPTION
:
342 uci_push_option(L
, ptr
.o
);
355 uci_lua_perror(L
, ctx
, "uci.get");
357 case UCI_ERR_NOTFOUND
:
366 uci_lua_get(lua_State
*L
)
368 return uci_lua_get_any(L
, false);
372 uci_lua_get_all(lua_State
*L
)
374 return uci_lua_get_any(L
, true);
378 uci_lua_add(lua_State
*L
)
380 struct uci_context
*ctx
;
381 struct uci_section
*s
= NULL
;
382 struct uci_package
*p
;
385 const char *name
= NULL
;
388 ctx
= find_context(L
, &offset
);
389 package
= luaL_checkstring(L
, 1 + offset
);
390 type
= luaL_checkstring(L
, 2 + offset
);
391 p
= find_package(L
, ctx
, package
, true);
395 if (uci_add_section(ctx
, p
, type
, &s
) || !s
)
399 lua_pushstring(L
, name
);
408 uci_lua_delete(lua_State
*L
)
410 struct uci_context
*ctx
;
414 int err
= UCI_ERR_NOTFOUND
;
416 ctx
= find_context(L
, &offset
);
418 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
421 err
= uci_delete(ctx
, &ptr
);
427 uci_lua_perror(L
, ctx
, "uci.delete");
428 lua_pushboolean(L
, (err
== 0));
433 uci_lua_set(lua_State
*L
)
435 struct uci_context
*ctx
;
437 bool istable
= false;
438 int err
= UCI_ERR_MEM
;
440 int i
, nargs
, offset
= 0;
442 ctx
= find_context(L
, &offset
);
443 nargs
= lua_gettop(L
);
444 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
447 switch(nargs
- offset
) {
449 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
452 /* Format: uci.set("p", "s", "o", "v") */
453 if (lua_istable(L
, nargs
)) {
454 if (lua_objlen(L
, nargs
) < 1)
455 luaL_error(L
, "Cannot set an uci option to an empty table value");
456 lua_rawgeti(L
, nargs
, 1);
457 ptr
.value
= luaL_checkstring(L
, -1);
461 ptr
.value
= luaL_checkstring(L
, nargs
);
465 /* Format: uci.set("p", "s", "v") */
466 ptr
.value
= ptr
.option
;
474 err
= uci_lookup_ptr(ctx
, &ptr
, NULL
, false);
478 if (((ptr
.s
== NULL
) && (ptr
.option
!= NULL
)) || (ptr
.value
== NULL
)) {
483 err
= uci_set(ctx
, &ptr
);
488 for (i
= 2; i
<= lua_objlen(L
, nargs
); i
++) {
489 lua_rawgeti(L
, nargs
, i
);
490 ptr
.value
= luaL_checkstring(L
, -1);
491 err
= uci_add_list(ctx
, &ptr
);
500 uci_lua_perror(L
, ctx
, "uci.set");
501 lua_pushboolean(L
, (err
== 0));
512 uci_lua_package_cmd(lua_State
*L
, enum pkg_cmd cmd
)
514 struct uci_context
*ctx
;
515 struct uci_element
*e
, *tmp
;
519 int nargs
, offset
= 0;
521 ctx
= find_context(L
, &offset
);
522 nargs
= lua_gettop(L
);
523 if ((cmd
!= CMD_REVERT
) && (nargs
> 1))
526 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
529 uci_lookup_ptr(ctx
, &ptr
, NULL
, false);
531 uci_foreach_element_safe(&ctx
->root
, tmp
, e
) {
532 struct uci_package
*p
= uci_to_package(e
);
533 int ret
= UCI_ERR_INVAL
;
535 if (ptr
.p
&& (ptr
.p
!= p
))
541 ret
= uci_commit(ctx
, &p
, false);
544 ret
= uci_save(ctx
, p
);
547 ret
= uci_revert(ctx
, &ptr
);
556 lua_pushboolean(L
, !failed
);
561 uci_lua_save(lua_State
*L
)
563 return uci_lua_package_cmd(L
, CMD_SAVE
);
567 uci_lua_commit(lua_State
*L
)
569 return uci_lua_package_cmd(L
, CMD_COMMIT
);
573 uci_lua_revert(lua_State
*L
)
575 return uci_lua_package_cmd(L
, CMD_REVERT
);
579 uci_lua_add_change(lua_State
*L
, struct uci_element
*e
)
581 struct uci_history
*h
;
584 h
= uci_to_history(e
);
588 lua_getfield(L
, -1, h
->section
);
589 if (lua_isnil(L
, -1)) {
592 lua_pushvalue(L
, -1); /* copy for setfield */
593 lua_setfield(L
, -3, h
->section
);
596 name
= (h
->e
.name
? h
->e
.name
: ".type");
598 lua_pushstring(L
, h
->value
);
600 lua_pushstring(L
, "");
601 lua_setfield(L
, -2, name
);
606 uci_lua_changes_pkg(lua_State
*L
, struct uci_context
*ctx
, const char *package
)
608 struct uci_package
*p
= NULL
;
609 struct uci_element
*e
;
610 bool autoload
= false;
612 p
= find_package(L
, ctx
, package
, false);
615 p
= find_package(L
, ctx
, package
, true);
620 if (uci_list_empty(&p
->history
) && uci_list_empty(&p
->saved_history
))
624 uci_foreach_element(&p
->saved_history
, e
) {
625 uci_lua_add_change(L
, e
);
627 uci_foreach_element(&p
->history
, e
) {
628 uci_lua_add_change(L
, e
);
630 lua_setfield(L
, -2, p
->e
.name
);
638 uci_lua_changes(lua_State
*L
)
640 struct uci_context
*ctx
;
641 const char *package
= NULL
;
642 char **config
= NULL
;
646 ctx
= find_context(L
, &offset
);
647 nargs
= lua_gettop(L
);
648 switch(nargs
- offset
) {
650 package
= luaL_checkstring(L
, 1 + offset
);
654 luaL_error(L
, "invalid argument count");
659 uci_lua_changes_pkg(L
, ctx
, package
);
661 if (uci_list_configs(ctx
, &config
) != 0)
664 for(i
= 0; config
[i
] != NULL
; i
++) {
665 uci_lua_changes_pkg(L
, ctx
, config
[i
]);
674 uci_lua_get_confdir(lua_State
*L
)
676 struct uci_context
*ctx
= find_context(L
, NULL
);
677 lua_pushstring(L
, ctx
->confdir
);
682 uci_lua_set_confdir(lua_State
*L
)
684 struct uci_context
*ctx
;
687 ctx
= find_context(L
, &offset
);
688 luaL_checkstring(L
, 1 + offset
);
689 ret
= uci_set_confdir(ctx
, lua_tostring(L
, -1));
690 lua_pushboolean(L
, (ret
== 0));
695 uci_lua_get_savedir(lua_State
*L
)
697 struct uci_context
*ctx
= find_context(L
, NULL
);
698 lua_pushstring(L
, ctx
->savedir
);
703 uci_lua_set_savedir(lua_State
*L
)
705 struct uci_context
*ctx
;
708 ctx
= find_context(L
, &offset
);
709 luaL_checkstring(L
, 1 + offset
);
710 ret
= uci_set_savedir(ctx
, lua_tostring(L
, -1));
711 lua_pushboolean(L
, (ret
== 0));
717 uci_lua_gc(lua_State
*L
)
719 struct uci_context
*ctx
= find_context(L
, NULL
);
720 uci_free_context(ctx
);
725 uci_lua_cursor(lua_State
*L
)
727 struct uci_context
**u
;
728 int argc
= lua_gettop(L
);
730 u
= lua_newuserdata(L
, sizeof(struct uci_context
*));
731 luaL_getmetatable(L
, METANAME
);
732 lua_setmetatable(L
, -2);
734 *u
= uci_alloc_context();
736 luaL_error(L
, "Cannot allocate UCI context");
739 if (lua_isstring(L
, 2) &&
740 (uci_set_savedir(*u
, luaL_checkstring(L
, 2)) != UCI_OK
))
741 luaL_error(L
, "Unable to set savedir");
744 if (lua_isstring(L
, 1) &&
745 (uci_set_confdir(*u
, luaL_checkstring(L
, 1)) != UCI_OK
))
746 luaL_error(L
, "Unable to set savedir");
754 static const luaL_Reg uci
[] = {
755 { "__gc", uci_lua_gc
},
756 { "cursor", uci_lua_cursor
},
757 { "load", uci_lua_load
},
758 { "unload", uci_lua_unload
},
759 { "get", uci_lua_get
},
760 { "get_all", uci_lua_get_all
},
761 { "add", uci_lua_add
},
762 { "set", uci_lua_set
},
763 { "save", uci_lua_save
},
764 { "delete", uci_lua_delete
},
765 { "commit", uci_lua_commit
},
766 { "revert", uci_lua_revert
},
767 { "changes", uci_lua_changes
},
768 { "foreach", uci_lua_foreach
},
769 { "get_confdir", uci_lua_get_confdir
},
770 { "set_confdir", uci_lua_set_confdir
},
771 { "get_savedir", uci_lua_get_savedir
},
772 { "set_savedir", uci_lua_set_savedir
},
778 luaopen_uci(lua_State
*L
)
780 /* create metatable */
781 luaL_newmetatable(L
, METANAME
);
783 /* metatable.__index = metatable */
784 lua_pushvalue(L
, -1);
785 lua_setfield(L
, -2, "__index");
788 luaL_register(L
, NULL
, uci
);
792 luaL_register(L
, MODNAME
, uci
);