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
)
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 uci_foreach_element(&s
->options
, e
) {
201 struct uci_option
*o
= uci_to_option(e
);
202 uci_push_option(L
, o
);
203 lua_setfield(L
, -2, o
->e
.name
);
208 uci_push_package(lua_State
*L
, struct uci_package
*p
)
210 struct uci_element
*e
;
214 uci_foreach_element(&p
->sections
, e
) {
216 uci_push_section(L
, uci_to_section(e
));
217 lua_setfield(L
, -2, e
->name
);
222 uci_lua_unload(lua_State
*L
)
224 struct uci_context
*ctx
;
225 struct uci_package
*p
;
229 ctx
= find_context(L
, &offset
);
230 luaL_checkstring(L
, 1 + offset
);
231 s
= lua_tostring(L
, 1 + offset
);
232 p
= find_package(L
, ctx
, s
, false);
235 return uci_push_status(L
, ctx
, false);
237 lua_pushboolean(L
, 0);
243 uci_lua_load(lua_State
*L
)
245 struct uci_context
*ctx
;
246 struct uci_package
*p
= NULL
;
250 ctx
= find_context(L
, &offset
);
252 lua_pop(L
, 1); /* bool ret value of unload */
253 s
= lua_tostring(L
, -1);
255 uci_load(ctx
, s
, &p
);
256 return uci_push_status(L
, ctx
, false);
261 uci_lua_foreach(lua_State
*L
)
263 struct uci_context
*ctx
;
264 struct uci_package
*p
;
265 struct uci_element
*e
;
266 const char *package
, *type
;
270 ctx
= find_context(L
, &offset
);
271 package
= luaL_checkstring(L
, 1 + offset
);
276 type
= luaL_checkstring(L
, 2 + offset
);
278 if (!lua_isfunction(L
, 3 + offset
) || !package
)
279 luaL_error(L
, "Invalid argument");
281 p
= find_package(L
, ctx
, package
, true);
285 uci_foreach_element(&p
->sections
, e
) {
286 struct uci_section
*s
= uci_to_section(e
);
288 if (type
&& (strcmp(s
->type
, type
) != 0))
291 lua_pushvalue(L
, 3 + offset
); /* iterator function */
292 uci_push_section(L
, s
);
293 if (lua_pcall(L
, 1, 0, 0) == 0)
298 lua_pushboolean(L
, ret
);
303 uci_lua_get_any(lua_State
*L
, bool all
)
305 struct uci_context
*ctx
;
306 struct uci_element
*e
= NULL
;
310 int err
= UCI_ERR_NOTFOUND
;
312 ctx
= find_context(L
, &offset
);
314 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
317 uci_lookup_ptr(ctx
, &ptr
, NULL
, false);
318 if (!all
&& !ptr
.s
) {
322 if (!(ptr
.flags
& UCI_LOOKUP_COMPLETE
)) {
323 err
= UCI_ERR_NOTFOUND
;
330 case UCI_TYPE_PACKAGE
:
331 uci_push_package(L
, ptr
.p
);
333 case UCI_TYPE_SECTION
:
335 uci_push_section(L
, ptr
.s
);
337 lua_pushstring(L
, ptr
.s
->type
);
339 case UCI_TYPE_OPTION
:
340 uci_push_option(L
, ptr
.o
);
354 return uci_push_status(L
, ctx
, true);
358 uci_lua_get(lua_State
*L
)
360 return uci_lua_get_any(L
, false);
364 uci_lua_get_all(lua_State
*L
)
366 return uci_lua_get_any(L
, true);
370 uci_lua_add(lua_State
*L
)
372 struct uci_context
*ctx
;
373 struct uci_section
*s
= NULL
;
374 struct uci_package
*p
;
377 const char *name
= NULL
;
380 ctx
= find_context(L
, &offset
);
381 package
= luaL_checkstring(L
, 1 + offset
);
382 type
= luaL_checkstring(L
, 2 + offset
);
383 p
= find_package(L
, ctx
, package
, true);
387 if (uci_add_section(ctx
, p
, type
, &s
) || !s
)
391 lua_pushstring(L
, name
);
396 return uci_push_status(L
, ctx
, true);
400 uci_lua_delete(lua_State
*L
)
402 struct uci_context
*ctx
;
406 int err
= UCI_ERR_NOTFOUND
;
408 ctx
= find_context(L
, &offset
);
410 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
413 err
= uci_delete(ctx
, &ptr
);
418 return uci_push_status(L
, ctx
, false);
422 uci_lua_set(lua_State
*L
)
424 struct uci_context
*ctx
;
426 bool istable
= false;
427 int err
= UCI_ERR_MEM
;
429 int i
, nargs
, offset
= 0;
431 ctx
= find_context(L
, &offset
);
432 nargs
= lua_gettop(L
);
433 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
436 switch(nargs
- offset
) {
438 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
441 /* Format: uci.set("p", "s", "o", "v") */
442 if (lua_istable(L
, nargs
)) {
443 if (lua_objlen(L
, nargs
) < 1)
444 luaL_error(L
, "Cannot set an uci option to an empty table value");
445 lua_rawgeti(L
, nargs
, 1);
446 ptr
.value
= luaL_checkstring(L
, -1);
450 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_set(ctx
, &ptr
);
477 for (i
= 2; i
<= lua_objlen(L
, nargs
); i
++) {
478 lua_rawgeti(L
, nargs
, i
);
479 ptr
.value
= luaL_checkstring(L
, -1);
480 err
= uci_add_list(ctx
, &ptr
);
488 return uci_push_status(L
, ctx
, false);
498 uci_lua_package_cmd(lua_State
*L
, enum pkg_cmd cmd
)
500 struct uci_context
*ctx
;
501 struct uci_element
*e
, *tmp
;
505 int nargs
, offset
= 0;
507 ctx
= find_context(L
, &offset
);
508 nargs
= lua_gettop(L
);
509 if ((cmd
!= CMD_REVERT
) && (nargs
- offset
> 1))
512 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
515 uci_lookup_ptr(ctx
, &ptr
, NULL
, false);
517 uci_foreach_element_safe(&ctx
->root
, tmp
, e
) {
518 struct uci_package
*p
= uci_to_package(e
);
519 int ret
= UCI_ERR_INVAL
;
521 if (ptr
.p
&& (ptr
.p
!= p
))
527 ret
= uci_commit(ctx
, &p
, false);
530 ret
= uci_save(ctx
, p
);
533 ret
= uci_revert(ctx
, &ptr
);
542 return uci_push_status(L
, ctx
, false);
546 uci_lua_save(lua_State
*L
)
548 return uci_lua_package_cmd(L
, CMD_SAVE
);
552 uci_lua_commit(lua_State
*L
)
554 return uci_lua_package_cmd(L
, CMD_COMMIT
);
558 uci_lua_revert(lua_State
*L
)
560 return uci_lua_package_cmd(L
, CMD_REVERT
);
564 uci_lua_add_change(lua_State
*L
, struct uci_element
*e
)
566 struct uci_history
*h
;
569 h
= uci_to_history(e
);
573 lua_getfield(L
, -1, h
->section
);
574 if (lua_isnil(L
, -1)) {
577 lua_pushvalue(L
, -1); /* copy for setfield */
578 lua_setfield(L
, -3, h
->section
);
581 name
= (h
->e
.name
? h
->e
.name
: ".type");
583 lua_pushstring(L
, h
->value
);
585 lua_pushstring(L
, "");
586 lua_setfield(L
, -2, name
);
591 uci_lua_changes_pkg(lua_State
*L
, struct uci_context
*ctx
, const char *package
)
593 struct uci_package
*p
= NULL
;
594 struct uci_element
*e
;
595 bool autoload
= false;
597 p
= find_package(L
, ctx
, package
, false);
600 p
= find_package(L
, ctx
, package
, true);
605 if (uci_list_empty(&p
->history
) && uci_list_empty(&p
->saved_history
))
609 uci_foreach_element(&p
->saved_history
, e
) {
610 uci_lua_add_change(L
, e
);
612 uci_foreach_element(&p
->history
, e
) {
613 uci_lua_add_change(L
, e
);
615 lua_setfield(L
, -2, p
->e
.name
);
623 uci_lua_changes(lua_State
*L
)
625 struct uci_context
*ctx
;
626 const char *package
= NULL
;
627 char **config
= NULL
;
631 ctx
= find_context(L
, &offset
);
632 nargs
= lua_gettop(L
);
633 switch(nargs
- offset
) {
635 package
= luaL_checkstring(L
, 1 + offset
);
639 luaL_error(L
, "invalid argument count");
644 uci_lua_changes_pkg(L
, ctx
, package
);
646 if (uci_list_configs(ctx
, &config
) != 0)
649 for(i
= 0; config
[i
] != NULL
; i
++) {
650 uci_lua_changes_pkg(L
, ctx
, config
[i
]);
659 uci_lua_get_confdir(lua_State
*L
)
661 struct uci_context
*ctx
= find_context(L
, NULL
);
662 lua_pushstring(L
, ctx
->confdir
);
667 uci_lua_set_confdir(lua_State
*L
)
669 struct uci_context
*ctx
;
672 ctx
= find_context(L
, &offset
);
673 luaL_checkstring(L
, 1 + offset
);
674 ret
= uci_set_confdir(ctx
, lua_tostring(L
, -1));
675 return uci_push_status(L
, ctx
, false);
679 uci_lua_get_savedir(lua_State
*L
)
681 struct uci_context
*ctx
= find_context(L
, NULL
);
682 lua_pushstring(L
, ctx
->savedir
);
687 uci_lua_set_savedir(lua_State
*L
)
689 struct uci_context
*ctx
;
692 ctx
= find_context(L
, &offset
);
693 luaL_checkstring(L
, 1 + offset
);
694 ret
= uci_set_savedir(ctx
, lua_tostring(L
, -1));
695 return uci_push_status(L
, ctx
, false);
699 uci_lua_gc(lua_State
*L
)
701 struct uci_context
*ctx
= find_context(L
, NULL
);
702 uci_free_context(ctx
);
707 uci_lua_cursor(lua_State
*L
)
709 struct uci_context
**u
;
710 int argc
= lua_gettop(L
);
712 u
= lua_newuserdata(L
, sizeof(struct uci_context
*));
713 luaL_getmetatable(L
, METANAME
);
714 lua_setmetatable(L
, -2);
716 *u
= uci_alloc_context();
718 luaL_error(L
, "Cannot allocate UCI context");
721 if (lua_isstring(L
, 2) &&
722 (uci_set_savedir(*u
, luaL_checkstring(L
, 2)) != UCI_OK
))
723 luaL_error(L
, "Unable to set savedir");
726 if (lua_isstring(L
, 1) &&
727 (uci_set_confdir(*u
, luaL_checkstring(L
, 1)) != UCI_OK
))
728 luaL_error(L
, "Unable to set savedir");
736 static const luaL_Reg uci
[] = {
737 { "__gc", uci_lua_gc
},
738 { "cursor", uci_lua_cursor
},
739 { "load", uci_lua_load
},
740 { "unload", uci_lua_unload
},
741 { "get", uci_lua_get
},
742 { "get_all", uci_lua_get_all
},
743 { "add", uci_lua_add
},
744 { "set", uci_lua_set
},
745 { "save", uci_lua_save
},
746 { "delete", uci_lua_delete
},
747 { "commit", uci_lua_commit
},
748 { "revert", uci_lua_revert
},
749 { "changes", uci_lua_changes
},
750 { "foreach", uci_lua_foreach
},
751 { "get_confdir", uci_lua_get_confdir
},
752 { "set_confdir", uci_lua_set_confdir
},
753 { "get_savedir", uci_lua_get_savedir
},
754 { "set_savedir", uci_lua_set_savedir
},
760 luaopen_uci(lua_State
*L
)
762 /* create metatable */
763 luaL_newmetatable(L
, METANAME
);
765 /* metatable.__index = metatable */
766 lua_pushvalue(L
, -1);
767 lua_setfield(L
, -2, "__index");
770 luaL_register(L
, NULL
, uci
);
774 luaL_register(L
, MODNAME
, uci
);