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 #if !defined LUA_VERSION_NUM || LUA_VERSION_NUM==501
40 * ** Adapted from Lua 5.2.0
42 static void luaL_setfuncs (lua_State
*L
, const luaL_Reg
*l
, int nup
) {
43 luaL_checkstack(L
, nup
+1, "too many upvalues");
44 for (; l
->name
!= NULL
; l
++) { /* fill the table with given functions */
46 lua_pushstring(L
, l
->name
);
47 for (i
= 0; i
< nup
; i
++) /* copy upvalues to the top */
48 lua_pushvalue(L
, -(nup
+1));
49 lua_pushcclosure(L
, l
->func
, nup
); /* closure with those upvalues */
50 lua_settable(L
, -(nup
+ 3));
52 lua_pop(L
, nup
); /* remove upvalues */
55 #define lua_rawlen(L, i) lua_objlen(L, i)
59 static struct uci_context
*global_ctx
= NULL
;
61 static struct uci_context
*
62 find_context(lua_State
*L
, int *offset
)
64 struct uci_context
**ctx
;
65 if (!lua_isuserdata(L
, 1)) {
67 global_ctx
= uci_alloc_context();
69 luaL_error(L
, "failed to allocate UCI context");
79 ctx
= luaL_checkudata(L
, 1, METANAME
);
81 luaL_error(L
, "failed to get UCI context");
88 static struct uci_package
*
89 find_package(lua_State
*L
, struct uci_context
*ctx
, const char *str
, bool al
)
91 struct uci_package
*p
= NULL
;
92 struct uci_element
*e
;
96 sep
= strchr(str
, '.');
98 name
= malloc(1 + sep
- str
);
100 luaL_error(L
, "out of memory");
103 strncpy(name
, str
, sep
- str
);
108 uci_foreach_element(&ctx
->root
, e
) {
109 if (strcmp(e
->name
, name
) != 0)
112 p
= uci_to_package(e
);
117 uci_load(ctx
, name
, &p
);
119 uci_load(ctx
, name
, &p
);
129 lookup_args(lua_State
*L
, struct uci_context
*ctx
, int offset
, struct uci_ptr
*ptr
, char **buf
)
135 luaL_checkstring(L
, 1 + offset
);
136 s
= strdup(lua_tostring(L
, 1 + offset
));
140 memset(ptr
, 0, sizeof(struct uci_ptr
));
141 if (!find_package(L
, ctx
, s
, true))
144 switch (n
- offset
) {
147 ptr
->option
= luaL_checkstring(L
, 3 + offset
);
150 ptr
->section
= luaL_checkstring(L
, 2 + offset
);
151 ptr
->package
= luaL_checkstring(L
, 1 + offset
);
152 if (uci_lookup_ptr(ctx
, ptr
, NULL
, true) != UCI_OK
)
156 if (uci_lookup_ptr(ctx
, ptr
, s
, true) != UCI_OK
)
160 luaL_error(L
, "invalid argument count");
174 uci_push_status(lua_State
*L
, struct uci_context
*ctx
, bool hasarg
)
179 lua_pushboolean(L
, (ctx
->err
== UCI_OK
));
181 uci_get_errorstr(ctx
, &str
, MODNAME
);
183 lua_pushstring(L
, str
);
192 uci_push_option(lua_State
*L
, struct uci_option
*o
)
194 struct uci_element
*e
;
198 case UCI_TYPE_STRING
:
199 lua_pushstring(L
, o
->v
.string
);
203 uci_foreach_element(&o
->v
.list
, e
) {
205 lua_pushstring(L
, e
->name
);
206 lua_rawseti(L
, -2, i
);
216 uci_push_section(lua_State
*L
, struct uci_section
*s
, int index
)
218 struct uci_element
*e
;
221 lua_pushboolean(L
, s
->anonymous
);
222 lua_setfield(L
, -2, ".anonymous");
223 lua_pushstring(L
, s
->type
);
224 lua_setfield(L
, -2, ".type");
225 lua_pushstring(L
, s
->e
.name
);
226 lua_setfield(L
, -2, ".name");
228 lua_pushinteger(L
, index
);
229 lua_setfield(L
, -2, ".index");
232 uci_foreach_element(&s
->options
, e
) {
233 struct uci_option
*o
= uci_to_option(e
);
234 uci_push_option(L
, o
);
235 lua_setfield(L
, -2, o
->e
.name
);
240 uci_push_package(lua_State
*L
, struct uci_package
*p
)
242 struct uci_element
*e
;
246 uci_foreach_element(&p
->sections
, e
) {
247 uci_push_section(L
, uci_to_section(e
), i
);
248 lua_setfield(L
, -2, e
->name
);
254 uci_lua_unload(lua_State
*L
)
256 struct uci_context
*ctx
;
257 struct uci_package
*p
;
261 ctx
= find_context(L
, &offset
);
262 luaL_checkstring(L
, 1 + offset
);
263 s
= lua_tostring(L
, 1 + offset
);
264 p
= find_package(L
, ctx
, s
, false);
267 return uci_push_status(L
, ctx
, false);
269 lua_pushboolean(L
, 0);
275 uci_lua_load(lua_State
*L
)
277 struct uci_context
*ctx
;
278 struct uci_package
*p
= NULL
;
282 ctx
= find_context(L
, &offset
);
284 lua_pop(L
, 1); /* bool ret value of unload */
285 s
= lua_tostring(L
, -1);
287 uci_load(ctx
, s
, &p
);
288 return uci_push_status(L
, ctx
, false);
293 uci_lua_foreach(lua_State
*L
)
295 struct uci_context
*ctx
;
296 struct uci_package
*p
;
297 struct uci_element
*e
, *tmp
;
298 const char *package
, *type
;
303 ctx
= find_context(L
, &offset
);
304 package
= luaL_checkstring(L
, 1 + offset
);
306 if (lua_isnil(L
, 2 + offset
))
309 type
= luaL_checkstring(L
, 2 + offset
);
311 if (!lua_isfunction(L
, 3 + offset
) || !package
)
312 return luaL_error(L
, "Invalid argument");
314 p
= find_package(L
, ctx
, package
, true);
318 uci_foreach_element_safe(&p
->sections
, tmp
, e
) {
319 struct uci_section
*s
= uci_to_section(e
);
323 if (type
&& (strcmp(s
->type
, type
) != 0))
326 lua_pushvalue(L
, 3 + offset
); /* iterator function */
327 uci_push_section(L
, s
, i
- 1);
328 if (lua_pcall(L
, 1, 1, 0) == 0) {
330 if (lua_isboolean(L
, -1) && !lua_toboolean(L
, -1))
341 lua_pushboolean(L
, ret
);
346 uci_lua_get_any(lua_State
*L
, bool all
)
348 struct uci_context
*ctx
;
349 struct uci_element
*e
= NULL
;
353 int err
= UCI_ERR_NOTFOUND
;
355 ctx
= find_context(L
, &offset
);
357 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
360 uci_lookup_ptr(ctx
, &ptr
, NULL
, true);
361 if (!all
&& !ptr
.s
) {
365 if (!(ptr
.flags
& UCI_LOOKUP_COMPLETE
)) {
366 err
= UCI_ERR_NOTFOUND
;
373 case UCI_TYPE_PACKAGE
:
374 uci_push_package(L
, ptr
.p
);
376 case UCI_TYPE_SECTION
:
378 uci_push_section(L
, ptr
.s
, -1);
380 lua_pushstring(L
, ptr
.s
->type
);
382 case UCI_TYPE_OPTION
:
383 uci_push_option(L
, ptr
.o
);
399 return uci_push_status(L
, ctx
, true);
403 uci_lua_get(lua_State
*L
)
405 return uci_lua_get_any(L
, false);
409 uci_lua_get_all(lua_State
*L
)
411 return uci_lua_get_any(L
, true);
415 uci_lua_add(lua_State
*L
)
417 struct uci_context
*ctx
;
418 struct uci_section
*s
= NULL
;
419 struct uci_package
*p
;
422 const char *name
= NULL
;
425 ctx
= find_context(L
, &offset
);
426 package
= luaL_checkstring(L
, 1 + offset
);
427 type
= luaL_checkstring(L
, 2 + offset
);
428 p
= find_package(L
, ctx
, package
, true);
432 if (uci_add_section(ctx
, p
, type
, &s
) || !s
)
436 lua_pushstring(L
, name
);
441 return uci_push_status(L
, ctx
, true);
445 uci_lua_delete(lua_State
*L
)
447 struct uci_context
*ctx
;
452 ctx
= find_context(L
, &offset
);
454 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
457 uci_delete(ctx
, &ptr
);
462 return uci_push_status(L
, ctx
, false);
466 uci_lua_rename(lua_State
*L
)
468 struct uci_context
*ctx
;
470 int err
= UCI_ERR_MEM
;
472 int nargs
, offset
= 0;
474 ctx
= find_context(L
, &offset
);
475 nargs
= lua_gettop(L
);
476 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
479 switch(nargs
- offset
) {
481 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
484 /* Format: uci.set("p", "s", "o", "v") */
485 ptr
.value
= luaL_checkstring(L
, nargs
);
488 /* Format: uci.set("p", "s", "v") */
489 ptr
.value
= ptr
.option
;
497 err
= uci_lookup_ptr(ctx
, &ptr
, NULL
, true);
501 if (((ptr
.s
== NULL
) && (ptr
.option
!= NULL
)) || (ptr
.value
== NULL
)) {
506 err
= uci_rename(ctx
, &ptr
);
513 return uci_push_status(L
, ctx
, false);
517 uci_lua_reorder(lua_State
*L
)
519 struct uci_context
*ctx
;
521 int err
= UCI_ERR_MEM
;
523 int nargs
, offset
= 0;
525 ctx
= find_context(L
, &offset
);
526 nargs
= lua_gettop(L
);
527 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
530 switch(nargs
- offset
) {
532 /* Format: uci.set("p.s=v") or uci.set("p.s=v") */
539 /* Format: uci.set("p", "s", "v") */
540 ptr
.value
= ptr
.option
;
548 err
= uci_lookup_ptr(ctx
, &ptr
, NULL
, true);
552 if ((ptr
.s
== NULL
) || (ptr
.value
== NULL
)) {
557 err
= uci_reorder_section(ctx
, ptr
.s
, strtoul(ptr
.value
, NULL
, 10));
564 return uci_push_status(L
, ctx
, false);
569 uci_lua_set(lua_State
*L
)
571 struct uci_context
*ctx
;
573 bool istable
= false;
574 int err
= UCI_ERR_MEM
;
577 int i
, nargs
, offset
= 0;
579 ctx
= find_context(L
, &offset
);
580 nargs
= lua_gettop(L
);
581 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
584 switch(nargs
- offset
) {
586 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
589 /* Format: uci.set("p", "s", "o", "v") */
590 if (lua_istable(L
, nargs
)) {
591 if (lua_rawlen(L
, nargs
) < 1)
592 return luaL_error(L
, "Cannot set an uci option to an empty table value");
593 lua_rawgeti(L
, nargs
, 1);
594 ptr
.value
= luaL_checkstring(L
, -1);
598 ptr
.value
= luaL_checkstring(L
, nargs
);
602 /* Format: uci.set("p", "s", "v") */
603 ptr
.value
= ptr
.option
;
611 err
= uci_lookup_ptr(ctx
, &ptr
, NULL
, true);
615 if (((ptr
.s
== NULL
) && (ptr
.option
!= NULL
)) || (ptr
.value
== NULL
)) {
621 if (lua_rawlen(L
, nargs
) == 1) {
626 err
= uci_delete(ctx
, &ptr
);
633 err
= uci_set(ctx
, &ptr
);
638 for (; i
<= lua_rawlen(L
, nargs
); i
++) {
639 lua_rawgeti(L
, nargs
, i
);
640 ptr
.value
= luaL_checkstring(L
, -1);
641 err
= uci_add_list(ctx
, &ptr
);
647 err
= uci_set(ctx
, &ptr
);
656 return uci_push_status(L
, ctx
, false);
666 uci_lua_package_cmd(lua_State
*L
, enum pkg_cmd cmd
)
668 struct uci_context
*ctx
;
669 struct uci_element
*e
, *tmp
;
672 int nargs
, offset
= 0;
674 ctx
= find_context(L
, &offset
);
675 nargs
= lua_gettop(L
);
676 if ((cmd
!= CMD_REVERT
) && (nargs
- offset
> 1))
679 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
682 uci_lookup_ptr(ctx
, &ptr
, NULL
, true);
684 uci_foreach_element_safe(&ctx
->root
, tmp
, e
) {
685 struct uci_package
*p
= uci_to_package(e
);
687 if (ptr
.p
&& (ptr
.p
!= p
))
693 uci_commit(ctx
, &p
, false);
699 uci_revert(ctx
, &ptr
);
707 return uci_push_status(L
, ctx
, false);
711 uci_lua_save(lua_State
*L
)
713 return uci_lua_package_cmd(L
, CMD_SAVE
);
717 uci_lua_commit(lua_State
*L
)
719 return uci_lua_package_cmd(L
, CMD_COMMIT
);
723 uci_lua_revert(lua_State
*L
)
725 return uci_lua_package_cmd(L
, CMD_REVERT
);
729 uci_lua_add_change(lua_State
*L
, struct uci_element
*e
)
739 lua_getfield(L
, -1, h
->section
);
740 if (lua_isnil(L
, -1)) {
743 lua_pushvalue(L
, -1); /* copy for setfield */
744 lua_setfield(L
, -3, h
->section
);
748 value
= h
->value
? h
->value
: "";
751 lua_getfield(L
, -1, name
);
753 /* this delta is a list add operation */
754 if (h
->cmd
== UCI_CMD_LIST_ADD
) {
755 /* there seems to be no table yet */
756 if (!lua_istable(L
, -1)) {
759 /* if there is a value on the stack already, add */
760 if (!lua_isnil(L
, -2)) {
761 lua_pushvalue(L
, -2);
762 lua_rawseti(L
, -2, 1);
763 lua_pushstring(L
, value
);
764 lua_rawseti(L
, -2, 2);
766 /* this is the first table item */
768 lua_pushstring(L
, value
);
769 lua_rawseti(L
, -2, 1);
772 lua_setfield(L
, -3, name
);
774 /* a table is on the top of the stack and this is a subsequent,
775 * list_add, append this value to table */
777 lua_pushstring(L
, value
);
778 lua_rawseti(L
, -2, lua_rawlen(L
, -2) + 1);
781 /* non-list change, simply set/replace field */
783 lua_pushstring(L
, value
);
784 lua_setfield(L
, -3, name
);
789 lua_pushstring(L
, value
);
790 lua_setfield(L
, -2, ".type");
797 uci_lua_changes_pkg(lua_State
*L
, struct uci_context
*ctx
, const char *package
)
799 struct uci_package
*p
= NULL
;
800 struct uci_element
*e
;
801 bool autoload
= false;
803 p
= find_package(L
, ctx
, package
, false);
806 p
= find_package(L
, ctx
, package
, true);
811 if (uci_list_empty(&p
->delta
) && uci_list_empty(&p
->saved_delta
))
815 uci_foreach_element(&p
->saved_delta
, e
) {
816 uci_lua_add_change(L
, e
);
818 uci_foreach_element(&p
->delta
, e
) {
819 uci_lua_add_change(L
, e
);
821 lua_setfield(L
, -2, p
->e
.name
);
829 uci_lua_changes(lua_State
*L
)
831 struct uci_context
*ctx
;
832 const char *package
= NULL
;
833 char **config
= NULL
;
837 ctx
= find_context(L
, &offset
);
838 nargs
= lua_gettop(L
);
839 switch(nargs
- offset
) {
841 package
= luaL_checkstring(L
, 1 + offset
);
845 return luaL_error(L
, "invalid argument count");
850 uci_lua_changes_pkg(L
, ctx
, package
);
852 if (uci_list_configs(ctx
, &config
) != 0)
855 for(i
= 0; config
[i
] != NULL
; i
++) {
856 uci_lua_changes_pkg(L
, ctx
, config
[i
]);
865 uci_lua_get_confdir(lua_State
*L
)
867 struct uci_context
*ctx
= find_context(L
, NULL
);
868 lua_pushstring(L
, ctx
->confdir
);
873 uci_lua_set_confdir(lua_State
*L
)
875 struct uci_context
*ctx
;
878 ctx
= find_context(L
, &offset
);
879 luaL_checkstring(L
, 1 + offset
);
880 uci_set_confdir(ctx
, lua_tostring(L
, -1));
881 return uci_push_status(L
, ctx
, false);
885 uci_lua_get_savedir(lua_State
*L
)
887 struct uci_context
*ctx
= find_context(L
, NULL
);
888 lua_pushstring(L
, ctx
->savedir
);
893 uci_lua_add_delta(lua_State
*L
)
895 struct uci_context
*ctx
;
898 ctx
= find_context(L
, &offset
);
899 luaL_checkstring(L
, 1 + offset
);
900 uci_add_delta_path(ctx
, lua_tostring(L
, -1));
901 return uci_push_status(L
, ctx
, false);
905 uci_lua_set_savedir(lua_State
*L
)
907 struct uci_context
*ctx
;
910 ctx
= find_context(L
, &offset
);
911 luaL_checkstring(L
, 1 + offset
);
912 uci_set_savedir(ctx
, lua_tostring(L
, -1));
913 return uci_push_status(L
, ctx
, false);
917 uci_lua_gc(lua_State
*L
)
919 struct uci_context
*ctx
= find_context(L
, NULL
);
920 uci_free_context(ctx
);
925 uci_lua_cursor(lua_State
*L
)
927 struct uci_context
**u
;
928 int argc
= lua_gettop(L
);
930 u
= lua_newuserdata(L
, sizeof(struct uci_context
*));
931 luaL_getmetatable(L
, METANAME
);
932 lua_setmetatable(L
, -2);
934 *u
= uci_alloc_context();
936 return luaL_error(L
, "Cannot allocate UCI context");
939 if (lua_isstring(L
, 2) &&
940 (uci_set_savedir(*u
, luaL_checkstring(L
, 2)) != UCI_OK
))
941 return luaL_error(L
, "Unable to set savedir");
944 if (lua_isstring(L
, 1) &&
945 (uci_set_confdir(*u
, luaL_checkstring(L
, 1)) != UCI_OK
))
946 return luaL_error(L
, "Unable to set savedir");
954 static const luaL_Reg uci
[] = {
955 { "__gc", uci_lua_gc
},
956 { "cursor", uci_lua_cursor
},
957 { "load", uci_lua_load
},
958 { "unload", uci_lua_unload
},
959 { "get", uci_lua_get
},
960 { "get_all", uci_lua_get_all
},
961 { "add", uci_lua_add
},
962 { "set", uci_lua_set
},
963 { "rename", uci_lua_rename
},
964 { "save", uci_lua_save
},
965 { "delete", uci_lua_delete
},
966 { "commit", uci_lua_commit
},
967 { "revert", uci_lua_revert
},
968 { "reorder", uci_lua_reorder
},
969 { "changes", uci_lua_changes
},
970 { "foreach", uci_lua_foreach
},
971 { "add_history", uci_lua_add_delta
},
972 { "add_delta", uci_lua_add_delta
},
973 { "get_confdir", uci_lua_get_confdir
},
974 { "set_confdir", uci_lua_set_confdir
},
975 { "get_savedir", uci_lua_get_savedir
},
976 { "set_savedir", uci_lua_set_savedir
},
982 luaopen_uci(lua_State
*L
)
984 /* create metatable */
985 luaL_newmetatable(L
, METANAME
);
987 /* metatable.__index = metatable */
988 lua_pushvalue(L
, -1);
989 lua_setfield(L
, -2, "__index");
992 luaL_setfuncs(L
, uci
, 0);
997 lua_pushvalue(L
, -1);
998 luaL_setfuncs(L
, uci
, 0);
999 lua_setglobal(L
, MODNAME
);