f70ca503b54b70fc179b6ed54e127937ad128679
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
;
379 int err
= UCI_ERR_NOTFOUND
;
381 ctx
= find_context(L
, &offset
);
383 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
386 lookup_ptr(ctx
, &ptr
, NULL
, true);
387 if (!all
&& !ptr
.s
) {
391 if (!(ptr
.flags
& UCI_LOOKUP_COMPLETE
)) {
392 err
= UCI_ERR_NOTFOUND
;
399 case UCI_TYPE_PACKAGE
:
400 uci_push_package(L
, ptr
.p
);
402 case UCI_TYPE_SECTION
:
404 uci_push_section(L
, ptr
.s
, -1);
406 lua_pushstring(L
, ptr
.s
->type
);
408 case UCI_TYPE_OPTION
:
409 uci_push_option(L
, ptr
.o
);
425 return uci_push_status(L
, ctx
, true);
429 uci_lua_get(lua_State
*L
)
431 return uci_lua_get_any(L
, false);
435 uci_lua_get_all(lua_State
*L
)
437 return uci_lua_get_any(L
, true);
441 uci_lua_add(lua_State
*L
)
443 struct uci_context
*ctx
;
444 struct uci_section
*s
= NULL
;
445 struct uci_package
*p
;
448 const char *name
= NULL
;
451 ctx
= find_context(L
, &offset
);
452 package
= luaL_checkstring(L
, 1 + offset
);
453 type
= luaL_checkstring(L
, 2 + offset
);
454 p
= find_package(L
, ctx
, package
, true);
458 if (uci_add_section(ctx
, p
, type
, &s
) || !s
)
462 lua_pushstring(L
, name
);
467 return uci_push_status(L
, ctx
, true);
471 uci_lua_delete(lua_State
*L
)
473 struct uci_context
*ctx
;
478 ctx
= find_context(L
, &offset
);
480 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
483 uci_delete(ctx
, &ptr
);
488 return uci_push_status(L
, ctx
, false);
492 uci_lua_rename(lua_State
*L
)
494 struct uci_context
*ctx
;
496 int err
= UCI_ERR_MEM
;
498 int nargs
, offset
= 0;
500 ctx
= find_context(L
, &offset
);
501 nargs
= lua_gettop(L
);
502 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
505 switch(nargs
- offset
) {
507 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
510 /* Format: uci.set("p", "s", "o", "v") */
511 ptr
.value
= luaL_checkstring(L
, nargs
);
514 /* Format: uci.set("p", "s", "v") */
515 ptr
.value
= ptr
.option
;
523 err
= lookup_ptr(ctx
, &ptr
, NULL
, true);
527 if (((ptr
.s
== NULL
) && (ptr
.option
!= NULL
)) || (ptr
.value
== NULL
)) {
532 err
= uci_rename(ctx
, &ptr
);
539 return uci_push_status(L
, ctx
, false);
543 uci_lua_reorder(lua_State
*L
)
545 struct uci_context
*ctx
;
547 int err
= UCI_ERR_MEM
;
549 int nargs
, offset
= 0;
551 ctx
= find_context(L
, &offset
);
552 nargs
= lua_gettop(L
);
553 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
556 switch(nargs
- offset
) {
558 /* Format: uci.set("p.s=v") or uci.set("p.s=v") */
565 /* Format: uci.set("p", "s", "v") */
566 ptr
.value
= ptr
.option
;
574 err
= lookup_ptr(ctx
, &ptr
, NULL
, true);
578 if ((ptr
.s
== NULL
) || (ptr
.value
== NULL
)) {
583 err
= uci_reorder_section(ctx
, ptr
.s
, strtoul(ptr
.value
, NULL
, 10));
590 return uci_push_status(L
, ctx
, false);
595 uci_lua_set(lua_State
*L
)
597 struct uci_context
*ctx
;
599 bool istable
= false;
600 int err
= UCI_ERR_MEM
;
603 int i
, nargs
, offset
= 0;
605 ctx
= find_context(L
, &offset
);
606 nargs
= lua_gettop(L
);
607 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
610 switch(nargs
- offset
) {
612 /* Format: uci.set("p.s.o=v") or uci.set("p.s=v") */
615 /* Format: uci.set("p", "s", "o", "v") */
616 if (lua_istable(L
, nargs
)) {
617 if (lua_rawlen(L
, nargs
) < 1)
618 return luaL_error(L
, "Cannot set an uci option to an empty table value");
619 lua_rawgeti(L
, nargs
, 1);
620 ptr
.value
= luaL_checkstring(L
, -1);
624 ptr
.value
= luaL_checkstring(L
, nargs
);
628 /* Format: uci.set("p", "s", "v") */
629 ptr
.value
= ptr
.option
;
637 err
= lookup_ptr(ctx
, &ptr
, NULL
, true);
641 if (((ptr
.s
== NULL
) && (ptr
.option
!= NULL
)) || (ptr
.value
== NULL
)) {
647 if (lua_rawlen(L
, nargs
) == 1) {
652 err
= uci_delete(ctx
, &ptr
);
659 err
= uci_set(ctx
, &ptr
);
664 for (; i
<= lua_rawlen(L
, nargs
); i
++) {
665 lua_rawgeti(L
, nargs
, i
);
666 ptr
.value
= luaL_checkstring(L
, -1);
667 err
= uci_add_list(ctx
, &ptr
);
673 err
= uci_set(ctx
, &ptr
);
682 return uci_push_status(L
, ctx
, false);
692 uci_lua_package_cmd(lua_State
*L
, enum pkg_cmd cmd
)
694 struct uci_context
*ctx
;
695 struct uci_element
*e
, *tmp
;
698 int nargs
, offset
= 0;
700 ctx
= find_context(L
, &offset
);
701 nargs
= lua_gettop(L
);
702 if ((cmd
!= CMD_REVERT
) && (nargs
- offset
> 1))
705 if (lookup_args(L
, ctx
, offset
, &ptr
, &s
))
708 lookup_ptr(ctx
, &ptr
, NULL
, true);
710 uci_foreach_element_safe(&ctx
->root
, tmp
, e
) {
711 struct uci_package
*p
= uci_to_package(e
);
713 if (ptr
.p
&& (ptr
.p
!= p
))
719 uci_commit(ctx
, &p
, false);
725 uci_revert(ctx
, &ptr
);
733 return uci_push_status(L
, ctx
, false);
737 uci_lua_save(lua_State
*L
)
739 return uci_lua_package_cmd(L
, CMD_SAVE
);
743 uci_lua_commit(lua_State
*L
)
745 return uci_lua_package_cmd(L
, CMD_COMMIT
);
749 uci_lua_revert(lua_State
*L
)
751 return uci_lua_package_cmd(L
, CMD_REVERT
);
755 uci_lua_add_change(lua_State
*L
, struct uci_element
*e
)
765 lua_getfield(L
, -1, h
->section
);
766 if (lua_isnil(L
, -1)) {
769 lua_pushvalue(L
, -1); /* copy for setfield */
770 lua_setfield(L
, -3, h
->section
);
774 value
= h
->value
? h
->value
: "";
777 lua_getfield(L
, -1, name
);
779 /* this delta is a list add operation */
780 if (h
->cmd
== UCI_CMD_LIST_ADD
) {
781 /* there seems to be no table yet */
782 if (!lua_istable(L
, -1)) {
785 /* if there is a value on the stack already, add */
786 if (!lua_isnil(L
, -2)) {
787 lua_pushvalue(L
, -2);
788 lua_rawseti(L
, -2, 1);
789 lua_pushstring(L
, value
);
790 lua_rawseti(L
, -2, 2);
792 /* this is the first table item */
794 lua_pushstring(L
, value
);
795 lua_rawseti(L
, -2, 1);
798 lua_setfield(L
, -3, name
);
800 /* a table is on the top of the stack and this is a subsequent,
801 * list_add, append this value to table */
803 lua_pushstring(L
, value
);
804 lua_rawseti(L
, -2, lua_rawlen(L
, -2) + 1);
807 /* non-list change, simply set/replace field */
809 lua_pushstring(L
, value
);
810 lua_setfield(L
, -3, name
);
815 lua_pushstring(L
, value
);
816 lua_setfield(L
, -2, ".type");
823 uci_lua_changes_pkg(lua_State
*L
, struct uci_context
*ctx
, const char *package
)
825 struct uci_package
*p
= NULL
;
826 struct uci_element
*e
;
827 bool autoload
= false;
829 p
= find_package(L
, ctx
, package
, false);
832 p
= find_package(L
, ctx
, package
, true);
837 if (uci_list_empty(&p
->delta
) && uci_list_empty(&p
->saved_delta
))
841 uci_foreach_element(&p
->saved_delta
, e
) {
842 uci_lua_add_change(L
, e
);
844 uci_foreach_element(&p
->delta
, e
) {
845 uci_lua_add_change(L
, e
);
847 lua_setfield(L
, -2, p
->e
.name
);
855 uci_lua_changes(lua_State
*L
)
857 struct uci_context
*ctx
;
858 const char *package
= NULL
;
859 char **config
= NULL
;
863 ctx
= find_context(L
, &offset
);
864 nargs
= lua_gettop(L
);
865 switch(nargs
- offset
) {
867 package
= luaL_checkstring(L
, 1 + offset
);
871 return luaL_error(L
, "invalid argument count");
876 uci_lua_changes_pkg(L
, ctx
, package
);
878 if (uci_list_configs(ctx
, &config
) != 0)
881 for(i
= 0; config
[i
] != NULL
; i
++) {
882 uci_lua_changes_pkg(L
, ctx
, config
[i
]);
891 uci_lua_get_confdir(lua_State
*L
)
893 struct uci_context
*ctx
= find_context(L
, NULL
);
894 lua_pushstring(L
, ctx
->confdir
);
899 uci_lua_set_confdir(lua_State
*L
)
901 struct uci_context
*ctx
;
904 ctx
= find_context(L
, &offset
);
905 luaL_checkstring(L
, 1 + offset
);
906 uci_set_confdir(ctx
, lua_tostring(L
, -1));
907 return uci_push_status(L
, ctx
, false);
911 uci_lua_get_savedir(lua_State
*L
)
913 struct uci_context
*ctx
= find_context(L
, NULL
);
914 lua_pushstring(L
, ctx
->savedir
);
919 uci_lua_add_delta(lua_State
*L
)
921 struct uci_context
*ctx
;
924 ctx
= find_context(L
, &offset
);
925 luaL_checkstring(L
, 1 + offset
);
926 uci_add_delta_path(ctx
, lua_tostring(L
, -1));
927 return uci_push_status(L
, ctx
, false);
931 uci_lua_set_savedir(lua_State
*L
)
933 struct uci_context
*ctx
;
936 ctx
= find_context(L
, &offset
);
937 luaL_checkstring(L
, 1 + offset
);
938 uci_set_savedir(ctx
, lua_tostring(L
, -1));
939 return uci_push_status(L
, ctx
, false);
943 uci_lua_list_configs(lua_State
*L
)
945 struct uci_context
*ctx
;
946 char **configs
= NULL
;
950 ctx
= find_context(L
, NULL
);
951 if ((uci_list_configs(ctx
, &configs
) != UCI_OK
) || !configs
)
952 return uci_push_status(L
, ctx
, false);
954 for (ptr
= configs
; *ptr
; ptr
++) {
955 lua_pushstring(L
, *ptr
);
956 lua_rawseti(L
, -2, i
++);
963 uci_lua_gc(lua_State
*L
)
965 struct uci_context
**ctx
;
967 if (!lua_isuserdata(L
, 1)) {
972 ctx
= luaL_checkudata(L
, 1, METANAME
);
976 uci_free_context(*ctx
);
982 uci_lua_cursor(lua_State
*L
)
984 struct uci_context
**u
;
985 int argc
= lua_gettop(L
);
987 u
= lua_newuserdata(L
, sizeof(struct uci_context
*));
988 luaL_getmetatable(L
, METANAME
);
989 lua_setmetatable(L
, -2);
991 *u
= uci_alloc_context();
993 return luaL_error(L
, "Cannot allocate UCI context");
996 if (lua_isstring(L
, 2) &&
997 (uci_set_savedir(*u
, luaL_checkstring(L
, 2)) != UCI_OK
))
998 return luaL_error(L
, "Unable to set savedir");
1001 if (lua_isstring(L
, 1) &&
1002 (uci_set_confdir(*u
, luaL_checkstring(L
, 1)) != UCI_OK
))
1003 return luaL_error(L
, "Unable to set savedir");
1011 static const luaL_Reg uci
[] = {
1012 { "__gc", uci_lua_gc
},
1013 { "close", uci_lua_gc
},
1014 { "cursor", uci_lua_cursor
},
1015 { "load", uci_lua_load
},
1016 { "unload", uci_lua_unload
},
1017 { "get", uci_lua_get
},
1018 { "get_all", uci_lua_get_all
},
1019 { "add", uci_lua_add
},
1020 { "set", uci_lua_set
},
1021 { "rename", uci_lua_rename
},
1022 { "save", uci_lua_save
},
1023 { "delete", uci_lua_delete
},
1024 { "commit", uci_lua_commit
},
1025 { "revert", uci_lua_revert
},
1026 { "reorder", uci_lua_reorder
},
1027 { "changes", uci_lua_changes
},
1028 { "foreach", uci_lua_foreach
},
1029 { "add_history", uci_lua_add_delta
},
1030 { "add_delta", uci_lua_add_delta
},
1031 { "get_confdir", uci_lua_get_confdir
},
1032 { "set_confdir", uci_lua_set_confdir
},
1033 { "get_savedir", uci_lua_get_savedir
},
1034 { "set_savedir", uci_lua_set_savedir
},
1035 { "list_configs", uci_lua_list_configs
},
1041 luaopen_uci(lua_State
*L
)
1043 /* create metatable */
1044 luaL_newmetatable(L
, METANAME
);
1046 /* metatable.__index = metatable */
1047 lua_pushvalue(L
, -1);
1048 lua_setfield(L
, -2, "__index");
1050 /* fill metatable */
1051 luaL_setfuncs(L
, uci
, 0);
1056 lua_pushvalue(L
, -1);
1057 luaL_setfuncs(L
, uci
, 0);
1058 lua_setglobal(L
, MODNAME
);