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
);
126 lookup_extended(struct uci_context
*ctx
, struct uci_ptr
*ptr
, char *str
, bool extended
)
129 struct uci_ptr lookup
;
131 /* use a copy of the passed ptr since failing lookups will
132 * clobber the state */
134 lookup
.flags
|= UCI_LOOKUP_EXTENDED
;
136 rv
= uci_lookup_ptr(ctx
, &lookup
, str
, extended
);
138 /* copy to passed ptr on success */
146 lookup_ptr(struct uci_context
*ctx
, struct uci_ptr
*ptr
, char *str
, bool extended
)
148 if (ptr
&& !ptr
->s
&& ptr
->section
&& *ptr
->section
== '@')
149 return lookup_extended(ctx
, ptr
, str
, extended
);
151 return uci_lookup_ptr(ctx
, ptr
, str
, extended
);
155 lookup_args(lua_State
*L
, struct uci_context
*ctx
, int offset
, struct uci_ptr
*ptr
, char **buf
)
161 luaL_checkstring(L
, 1 + offset
);
162 s
= strdup(lua_tostring(L
, 1 + offset
));
166 memset(ptr
, 0, sizeof(struct uci_ptr
));
167 if (!find_package(L
, ctx
, s
, true))
170 switch (n
- offset
) {
173 ptr
->option
= luaL_checkstring(L
, 3 + offset
);
176 ptr
->section
= luaL_checkstring(L
, 2 + offset
);
177 ptr
->package
= luaL_checkstring(L
, 1 + offset
);
178 if (lookup_ptr(ctx
, ptr
, NULL
, true) != UCI_OK
)
182 if (lookup_ptr(ctx
, ptr
, s
, true) != UCI_OK
)
186 luaL_error(L
, "invalid argument count");
200 uci_push_status(lua_State
*L
, struct uci_context
*ctx
, bool hasarg
)
205 lua_pushboolean(L
, (ctx
->err
== UCI_OK
));
207 uci_get_errorstr(ctx
, &str
, MODNAME
);
209 lua_pushstring(L
, str
);
218 uci_push_option(lua_State
*L
, struct uci_option
*o
)
220 struct uci_element
*e
;
224 case UCI_TYPE_STRING
:
225 lua_pushstring(L
, o
->v
.string
);
229 uci_foreach_element(&o
->v
.list
, e
) {
231 lua_pushstring(L
, e
->name
);
232 lua_rawseti(L
, -2, i
);
242 uci_push_section(lua_State
*L
, struct uci_section
*s
, int index
)
244 struct uci_element
*e
;
247 lua_pushboolean(L
, s
->anonymous
);
248 lua_setfield(L
, -2, ".anonymous");
249 lua_pushstring(L
, s
->type
);
250 lua_setfield(L
, -2, ".type");
251 lua_pushstring(L
, s
->e
.name
);
252 lua_setfield(L
, -2, ".name");
254 lua_pushinteger(L
, index
);
255 lua_setfield(L
, -2, ".index");
258 uci_foreach_element(&s
->options
, e
) {
259 struct uci_option
*o
= uci_to_option(e
);
260 uci_push_option(L
, o
);
261 lua_setfield(L
, -2, o
->e
.name
);
266 uci_push_package(lua_State
*L
, struct uci_package
*p
)
268 struct uci_element
*e
;
272 uci_foreach_element(&p
->sections
, e
) {
273 uci_push_section(L
, uci_to_section(e
), i
);
274 lua_setfield(L
, -2, e
->name
);
280 uci_lua_unload(lua_State
*L
)
282 struct uci_context
*ctx
;
283 struct uci_package
*p
;
287 ctx
= find_context(L
, &offset
);
288 luaL_checkstring(L
, 1 + offset
);
289 s
= lua_tostring(L
, 1 + offset
);
290 p
= find_package(L
, ctx
, s
, false);
293 return uci_push_status(L
, ctx
, false);
295 lua_pushboolean(L
, 0);
301 uci_lua_load(lua_State
*L
)
303 struct uci_context
*ctx
;
304 struct uci_package
*p
= NULL
;
308 ctx
= find_context(L
, &offset
);
310 lua_pop(L
, 1); /* bool ret value of unload */
311 s
= lua_tostring(L
, -1);
313 uci_load(ctx
, s
, &p
);
314 return uci_push_status(L
, ctx
, false);
319 uci_lua_foreach(lua_State
*L
)
321 struct uci_context
*ctx
;
322 struct uci_package
*p
;
323 struct uci_element
*e
, *tmp
;
324 const char *package
, *type
;
329 ctx
= find_context(L
, &offset
);
330 package
= luaL_checkstring(L
, 1 + offset
);
332 if (lua_isnil(L
, 2 + offset
))
335 type
= luaL_checkstring(L
, 2 + offset
);
337 if (!lua_isfunction(L
, 3 + offset
) || !package
)
338 return luaL_error(L
, "Invalid argument");
340 p
= find_package(L
, ctx
, package
, true);
344 uci_foreach_element_safe(&p
->sections
, tmp
, e
) {
345 struct uci_section
*s
= uci_to_section(e
);
349 if (type
&& (strcmp(s
->type
, type
) != 0))
352 lua_pushvalue(L
, 3 + offset
); /* iterator function */
353 uci_push_section(L
, s
, i
- 1);
354 if (lua_pcall(L
, 1, 1, 0) == 0) {
356 if (lua_isboolean(L
, -1) && !lua_toboolean(L
, -1))
367 lua_pushboolean(L
, ret
);
372 uci_lua_get_any(lua_State
*L
, bool all
)
374 struct uci_context
*ctx
;
375 struct uci_element
*e
= NULL
;
380 int err
= UCI_ERR_NOTFOUND
;
382 ctx
= find_context(L
, &offset
);
384 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
387 lookup_ptr(ctx
, &ptr
, NULL
, true);
388 if (!all
&& !ptr
.s
) {
392 if (!(ptr
.flags
& UCI_LOOKUP_COMPLETE
)) {
393 err
= UCI_ERR_NOTFOUND
;
400 case UCI_TYPE_PACKAGE
:
401 uci_push_package(L
, ptr
.p
);
403 case UCI_TYPE_SECTION
:
405 uci_push_section(L
, ptr
.s
, -1);
408 lua_pushstring(L
, ptr
.s
->type
);
409 lua_pushstring(L
, ptr
.s
->e
.name
);
413 case UCI_TYPE_OPTION
:
414 uci_push_option(L
, ptr
.o
);
430 return uci_push_status(L
, ctx
, true);
434 uci_lua_get(lua_State
*L
)
436 return uci_lua_get_any(L
, false);
440 uci_lua_get_all(lua_State
*L
)
442 return uci_lua_get_any(L
, true);
446 uci_lua_add(lua_State
*L
)
448 struct uci_context
*ctx
;
449 struct uci_section
*s
= NULL
;
450 struct uci_package
*p
;
453 const char *name
= NULL
;
456 ctx
= find_context(L
, &offset
);
457 package
= luaL_checkstring(L
, 1 + offset
);
458 type
= luaL_checkstring(L
, 2 + offset
);
459 p
= find_package(L
, ctx
, package
, true);
463 if (uci_add_section(ctx
, p
, type
, &s
) || !s
)
467 lua_pushstring(L
, name
);
472 return uci_push_status(L
, ctx
, true);
476 uci_lua_delete(lua_State
*L
)
478 struct uci_context
*ctx
;
483 ctx
= find_context(L
, &offset
);
485 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
488 uci_delete(ctx
, &ptr
);
493 return uci_push_status(L
, ctx
, false);
497 uci_lua_rename(lua_State
*L
)
499 struct uci_context
*ctx
;
501 int err
= UCI_ERR_MEM
;
503 int nargs
, offset
= 0;
505 ctx
= find_context(L
, &offset
);
506 nargs
= lua_gettop(L
);
507 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
510 switch(nargs
- offset
) {
512 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
515 /* Format: uci.set("p", "s", "o", "v") */
516 ptr
.value
= luaL_checkstring(L
, nargs
);
519 /* Format: uci.set("p", "s", "v") */
520 ptr
.value
= ptr
.option
;
528 err
= lookup_ptr(ctx
, &ptr
, NULL
, true);
532 if (((ptr
.s
== NULL
) && (ptr
.option
!= NULL
)) || (ptr
.value
== NULL
)) {
537 err
= uci_rename(ctx
, &ptr
);
544 return uci_push_status(L
, ctx
, false);
548 uci_lua_reorder(lua_State
*L
)
550 struct uci_context
*ctx
;
552 int err
= UCI_ERR_MEM
;
554 int 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=v") or uci.set("p.s=v") */
570 /* Format: uci.set("p", "s", "v") */
571 ptr
.value
= ptr
.option
;
579 err
= lookup_ptr(ctx
, &ptr
, NULL
, true);
583 if ((ptr
.s
== NULL
) || (ptr
.value
== NULL
)) {
588 err
= uci_reorder_section(ctx
, ptr
.s
, strtoul(ptr
.value
, NULL
, 10));
595 return uci_push_status(L
, ctx
, false);
600 uci_lua_set(lua_State
*L
)
602 struct uci_context
*ctx
;
604 bool istable
= false;
605 int err
= UCI_ERR_MEM
;
609 int nargs
, offset
= 0;
611 ctx
= find_context(L
, &offset
);
612 nargs
= lua_gettop(L
);
613 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
616 switch(nargs
- offset
) {
618 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
621 /* Format: uci.set("p", "s", "o", "v") */
622 if (lua_istable(L
, nargs
)) {
623 if (lua_rawlen(L
, nargs
) < 1)
624 return luaL_error(L
, "Cannot set an uci option to an empty table value");
625 lua_rawgeti(L
, nargs
, 1);
626 ptr
.value
= luaL_checkstring(L
, -1);
630 ptr
.value
= luaL_checkstring(L
, nargs
);
634 /* Format: uci.set("p", "s", "v") */
635 ptr
.value
= ptr
.option
;
643 err
= lookup_ptr(ctx
, &ptr
, NULL
, true);
647 if (((ptr
.s
== NULL
) && (ptr
.option
!= NULL
)) || (ptr
.value
== NULL
)) {
653 if (lua_rawlen(L
, nargs
) == 1) {
658 err
= uci_delete(ctx
, &ptr
);
665 err
= uci_set(ctx
, &ptr
);
670 for (; i
<= lua_rawlen(L
, nargs
); i
++) {
671 lua_rawgeti(L
, nargs
, i
);
672 ptr
.value
= luaL_checkstring(L
, -1);
673 err
= uci_add_list(ctx
, &ptr
);
679 err
= uci_set(ctx
, &ptr
);
688 return uci_push_status(L
, ctx
, false);
698 uci_lua_package_cmd(lua_State
*L
, enum pkg_cmd cmd
)
700 struct uci_context
*ctx
;
701 struct uci_element
*e
, *tmp
;
704 int nargs
, offset
= 0;
706 ctx
= find_context(L
, &offset
);
707 nargs
= lua_gettop(L
);
708 if ((cmd
!= CMD_REVERT
) && (nargs
- offset
> 1))
711 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
714 lookup_ptr(ctx
, &ptr
, NULL
, true);
716 uci_foreach_element_safe(&ctx
->root
, tmp
, e
) {
717 struct uci_package
*p
= uci_to_package(e
);
719 if (ptr
.p
&& (ptr
.p
!= p
))
725 uci_commit(ctx
, &p
, false);
731 uci_revert(ctx
, &ptr
);
739 return uci_push_status(L
, ctx
, false);
743 uci_lua_save(lua_State
*L
)
745 return uci_lua_package_cmd(L
, CMD_SAVE
);
749 uci_lua_commit(lua_State
*L
)
751 return uci_lua_package_cmd(L
, CMD_COMMIT
);
755 uci_lua_revert(lua_State
*L
)
757 return uci_lua_package_cmd(L
, CMD_REVERT
);
761 uci_lua_add_change(lua_State
*L
, struct uci_element
*e
)
771 lua_getfield(L
, -1, h
->section
);
772 if (lua_isnil(L
, -1)) {
775 lua_pushvalue(L
, -1); /* copy for setfield */
776 lua_setfield(L
, -3, h
->section
);
780 value
= h
->value
? h
->value
: "";
783 lua_getfield(L
, -1, name
);
785 /* this delta is a list add operation */
786 if (h
->cmd
== UCI_CMD_LIST_ADD
) {
787 /* there seems to be no table yet */
788 if (!lua_istable(L
, -1)) {
791 /* if there is a value on the stack already, add */
792 if (!lua_isnil(L
, -2)) {
793 lua_pushvalue(L
, -2);
794 lua_rawseti(L
, -2, 1);
795 lua_pushstring(L
, value
);
796 lua_rawseti(L
, -2, 2);
798 /* this is the first table item */
800 lua_pushstring(L
, value
);
801 lua_rawseti(L
, -2, 1);
804 lua_setfield(L
, -3, name
);
806 /* a table is on the top of the stack and this is a subsequent,
807 * list_add, append this value to table */
809 lua_pushstring(L
, value
);
810 lua_rawseti(L
, -2, lua_rawlen(L
, -2) + 1);
813 /* non-list change, simply set/replace field */
815 lua_pushstring(L
, value
);
816 lua_setfield(L
, -3, name
);
821 lua_pushstring(L
, value
);
822 lua_setfield(L
, -2, ".type");
829 uci_lua_changes_pkg(lua_State
*L
, struct uci_context
*ctx
, const char *package
)
831 struct uci_package
*p
= NULL
;
832 struct uci_element
*e
;
833 bool autoload
= false;
835 p
= find_package(L
, ctx
, package
, false);
838 p
= find_package(L
, ctx
, package
, true);
843 if (uci_list_empty(&p
->delta
) && uci_list_empty(&p
->saved_delta
))
847 uci_foreach_element(&p
->saved_delta
, e
) {
848 uci_lua_add_change(L
, e
);
850 uci_foreach_element(&p
->delta
, e
) {
851 uci_lua_add_change(L
, e
);
853 lua_setfield(L
, -2, p
->e
.name
);
861 uci_lua_changes(lua_State
*L
)
863 struct uci_context
*ctx
;
864 const char *package
= NULL
;
865 char **config
= NULL
;
869 ctx
= find_context(L
, &offset
);
870 nargs
= lua_gettop(L
);
871 switch(nargs
- offset
) {
873 package
= luaL_checkstring(L
, 1 + offset
);
877 return luaL_error(L
, "invalid argument count");
882 uci_lua_changes_pkg(L
, ctx
, package
);
886 if ((uci_list_configs(ctx
, &config
) != UCI_OK
) || !config
)
889 for (i
= 0; config
[i
] != NULL
; i
++) {
890 uci_lua_changes_pkg(L
, ctx
, config
[i
]);
898 uci_lua_get_confdir(lua_State
*L
)
900 struct uci_context
*ctx
= find_context(L
, NULL
);
901 lua_pushstring(L
, ctx
->confdir
);
906 uci_lua_set_confdir(lua_State
*L
)
908 struct uci_context
*ctx
;
911 ctx
= find_context(L
, &offset
);
912 luaL_checkstring(L
, 1 + offset
);
913 uci_set_confdir(ctx
, lua_tostring(L
, -1));
914 return uci_push_status(L
, ctx
, false);
918 uci_lua_get_savedir(lua_State
*L
)
920 struct uci_context
*ctx
= find_context(L
, NULL
);
921 lua_pushstring(L
, ctx
->savedir
);
926 uci_lua_add_delta(lua_State
*L
)
928 struct uci_context
*ctx
;
931 ctx
= find_context(L
, &offset
);
932 luaL_checkstring(L
, 1 + offset
);
933 uci_add_delta_path(ctx
, lua_tostring(L
, -1));
934 return uci_push_status(L
, ctx
, false);
938 uci_lua_set_savedir(lua_State
*L
)
940 struct uci_context
*ctx
;
943 ctx
= find_context(L
, &offset
);
944 luaL_checkstring(L
, 1 + offset
);
945 uci_set_savedir(ctx
, lua_tostring(L
, -1));
946 return uci_push_status(L
, ctx
, false);
950 uci_lua_list_configs(lua_State
*L
)
952 struct uci_context
*ctx
;
953 char **configs
= NULL
;
957 ctx
= find_context(L
, NULL
);
958 if ((uci_list_configs(ctx
, &configs
) != UCI_OK
) || !configs
)
959 return uci_push_status(L
, ctx
, false);
961 for (ptr
= configs
; *ptr
; ptr
++) {
962 lua_pushstring(L
, *ptr
);
963 lua_rawseti(L
, -2, i
++);
970 uci_lua_gc(lua_State
*L
)
972 struct uci_context
**ctx
;
974 if (!lua_isuserdata(L
, 1)) {
979 ctx
= luaL_checkudata(L
, 1, METANAME
);
983 uci_free_context(*ctx
);
989 uci_lua_cursor(lua_State
*L
)
991 struct uci_context
**u
;
992 int argc
= lua_gettop(L
);
994 u
= lua_newuserdata(L
, sizeof(struct uci_context
*));
995 luaL_getmetatable(L
, METANAME
);
996 lua_setmetatable(L
, -2);
998 *u
= uci_alloc_context();
1000 return luaL_error(L
, "Cannot allocate UCI context");
1003 if (lua_isstring(L
, 2) &&
1004 (uci_set_savedir(*u
, luaL_checkstring(L
, 2)) != UCI_OK
))
1005 return luaL_error(L
, "Unable to set savedir");
1008 if (lua_isstring(L
, 1) &&
1009 (uci_set_confdir(*u
, luaL_checkstring(L
, 1)) != UCI_OK
))
1010 return luaL_error(L
, "Unable to set confdir");
1018 static const luaL_Reg uci
[] = {
1019 { "__gc", uci_lua_gc
},
1020 { "close", uci_lua_gc
},
1021 { "cursor", uci_lua_cursor
},
1022 { "load", uci_lua_load
},
1023 { "unload", uci_lua_unload
},
1024 { "get", uci_lua_get
},
1025 { "get_all", uci_lua_get_all
},
1026 { "add", uci_lua_add
},
1027 { "set", uci_lua_set
},
1028 { "rename", uci_lua_rename
},
1029 { "save", uci_lua_save
},
1030 { "delete", uci_lua_delete
},
1031 { "commit", uci_lua_commit
},
1032 { "revert", uci_lua_revert
},
1033 { "reorder", uci_lua_reorder
},
1034 { "changes", uci_lua_changes
},
1035 { "foreach", uci_lua_foreach
},
1036 { "add_history", uci_lua_add_delta
},
1037 { "add_delta", uci_lua_add_delta
},
1038 { "get_confdir", uci_lua_get_confdir
},
1039 { "set_confdir", uci_lua_set_confdir
},
1040 { "get_savedir", uci_lua_get_savedir
},
1041 { "set_savedir", uci_lua_set_savedir
},
1042 { "list_configs", uci_lua_list_configs
},
1048 luaopen_uci(lua_State
*L
)
1050 /* create metatable */
1051 luaL_newmetatable(L
, METANAME
);
1053 /* metatable.__index = metatable */
1054 lua_pushvalue(L
, -1);
1055 lua_setfield(L
, -2, "__index");
1057 /* fill metatable */
1058 luaL_setfuncs(L
, uci
, 0);
1063 lua_pushvalue(L
, -1);
1064 luaL_setfuncs(L
, uci
, 0);
1065 lua_setglobal(L
, MODNAME
);