+++ /dev/null
---- /dev/null
-+++ b/trigger/uci_trigger.c
-@@ -0,0 +1,132 @@
-+#include <sys/types.h>
-+#include <sys/time.h>
-+#include <stdbool.h>
-+#include <string.h>
-+#include <stdio.h>
-+#include <lualib.h>
-+#include <lauxlib.h>
-+#include "uci.h"
-+
-+// #define DEBUG
-+
-+static int refcount = 0;
-+static lua_State *gL = NULL;
-+static bool prepared = false;
-+
-+struct trigger_set_op {
-+ struct uci_package *p;
-+ struct uci_delta *h;
-+};
-+
-+static int trigger_set(lua_State *L)
-+{
-+ struct trigger_set_op *so =
-+ (struct trigger_set_op *)lua_touserdata(L, 1);
-+ struct uci_package *p = so->p;
-+ struct uci_delta *h = so->h;
-+ struct uci_context *ctx = p->ctx;
-+
-+ /* ignore non-standard savedirs/configdirs
-+ * in order to not trigger events on uci state changes */
-+ if (strcmp(ctx->savedir, UCI_SAVEDIR) ||
-+ strcmp(ctx->confdir, UCI_CONFDIR))
-+ return 0;
-+
-+ if (!prepared) {
-+ lua_getglobal(L, "require");
-+ lua_pushstring(L, "uci.trigger");
-+ lua_call(L, 1, 0);
-+
-+ lua_getglobal(L, "uci");
-+ lua_getfield(L, -1, "trigger");
-+ lua_getfield(L, -1, "load_modules");
-+ lua_call(L, 0, 0);
-+ prepared = true;
-+ } else {
-+ lua_getglobal(L, "uci");
-+ lua_getfield(L, -1, "trigger");
-+ }
-+
-+ lua_getfield(L, -1, "set");
-+ lua_createtable(L, 4, 0);
-+
-+ lua_pushstring(L, p->e.name);
-+ lua_rawseti(L, -2, 1);
-+ if (h->section) {
-+ lua_pushstring(L, h->section);
-+ lua_rawseti(L, -2, 2);
-+ }
-+ if (h->e.name) {
-+ lua_pushstring(L, h->e.name);
-+ lua_rawseti(L, -2, 3);
-+ }
-+ if (h->value) {
-+ lua_pushstring(L, h->value);
-+ lua_rawseti(L, -2, 4);
-+ }
-+ lua_call(L, 1, 0);
-+ lua_pop(L, 2);
-+ return 0;
-+}
-+
-+#ifdef DEBUG
-+
-+static int report (lua_State *L, int status) {
-+ if (status && !lua_isnil(L, -1)) {
-+ const char *msg = lua_tostring(L, -1);
-+ if (msg == NULL) msg = "(error object is not a string)";
-+ fprintf(stderr, "ERROR: %s\n", msg);
-+ lua_pop(L, 1);
-+ }
-+ return status;
-+}
-+
-+#else
-+
-+static inline int report(lua_State *L, int status) {
-+ return status;
-+}
-+
-+#endif
-+
-+static void trigger_set_hook(const struct uci_hook_ops *ops, struct uci_package *p, struct uci_delta *h)
-+{
-+ struct trigger_set_op so;
-+
-+ so.p = p;
-+ so.h = h;
-+ report(gL, lua_cpcall(gL, &trigger_set, &so));
-+}
-+
-+static struct uci_hook_ops hook = {
-+ .set = trigger_set_hook,
-+};
-+
-+static int trigger_attach(struct uci_context *ctx)
-+{
-+ if (!gL) {
-+ gL = luaL_newstate();
-+ if (!gL)
-+ return -1;
-+ luaL_openlibs(gL);
-+
-+ refcount++;
-+ }
-+ uci_add_hook(ctx, &hook);
-+ return 0;
-+}
-+
-+static void trigger_detach(struct uci_context *ctx)
-+{
-+ if (gL && (--refcount <= 0)) {
-+ lua_close(gL);
-+ gL = NULL;
-+ refcount = 0;
-+ prepared = false;
-+ }
-+}
-+
-+struct uci_plugin_ops uci_plugin = {
-+ .attach = trigger_attach,
-+ .detach = trigger_detach,
-+};
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -35,6 +35,7 @@ ADD_EXECUTABLE(ucimap-example ucimap-exa
- TARGET_LINK_LIBRARIES(ucimap-example uci-static ucimap dl)
-
- ADD_SUBDIRECTORY(lua)
-+ADD_SUBDIRECTORY(trigger)
-
- INSTALL(FILES uci.h uci_config.h ucimap.h
- DESTINATION include/libubox
---- /dev/null
-+++ b/trigger/CMakeLists.txt
-@@ -0,0 +1,19 @@
-+cmake_minimum_required(VERSION 2.6)
-+
-+PROJECT(uci C)
-+
-+SET(CMAKE_INSTALL_PREFIX /)
-+
-+ADD_DEFINITIONS(-Os -Wall -Werror --std=gnu99 -g3 -I..)
-+
-+IF(APPLE)
-+ SET(CMAKE_SHARED_MODULE_CREATE_C_FLAGS "${CMAKE_SHARED_MODULE_CREATE_C_FLAGS} -undefined dynamic_lookup")
-+ENDIF(APPLE)
-+
-+ADD_LIBRARY(uci_trigger MODULE uci_trigger.c)
-+SET_TARGET_PROPERTIES(uci_trigger PROPERTIES
-+ OUTPUT_NAME uci_trigger
-+ PREFIX ""
-+)
-+TARGET_LINK_LIBRARIES(uci_trigger uci)
-+
-
+++ /dev/null
-module("uci.trigger", package.seeall)
-require("posix")
-require("uci")
-
-local path = "/lib/config/trigger"
-local triggers = nil
-local tmp_cursor = nil
-
-function load_modules()
- if triggers ~= nil then
- return
- end
- triggers = {
- list = {},
- uci = {},
- active = {}
- }
- local modules = posix.glob(path .. "/*.lua")
- if modules == nil then
- return
- end
- local oldpath = package.path
- package.path = path .. "/?.lua"
- for i, v in ipairs(modules) do
- pcall(require(string.gsub(v, path .. "/(%w+)%.lua$", "%1")))
- end
- package.path = oldpath
-end
-
-function check_table(table, name)
- if table[name] == nil then
- table[name] = {}
- end
- return table[name]
-end
-
-function get_table_val(val, vtype)
- if type(val) == (vtype or "string") then
- return { val }
- elseif type(val) == "table" then
- return val
- end
- return nil
-end
-
-function get_name_list(name)
- return get_table_val(name or ".all")
-end
-
-function add_trigger_option(list, t)
- local name = get_name_list(t.option)
- for i, n in ipairs(name) do
- option = check_table(list, n)
- table.insert(option, t)
- end
-end
-
-function add_trigger_section(list, t)
- local name = get_name_list(t.section)
- for i, n in ipairs(name) do
- section = check_table(list, n)
- add_trigger_option(section, t)
- end
-end
-
-function check_insert_triggers(dest, list, tuple)
- if list == nil then
- return
- end
- for i, t in ipairs(list) do
- local add = true
- if type(t.check) == "function" then
- add = t.check(tuple)
- end
- if add then
- dest[t.id] = t
- end
- end
-end
-
-function find_section_triggers(tlist, pos, tuple)
- if pos == nil then
- return
- end
- check_insert_triggers(tlist, pos[".all"], tuple)
- if tuple.option then
- check_insert_triggers(tlist, pos[tuple.option], tuple)
- end
-end
-
-function check_recursion(name, seen)
- if seen == nil then
- seen = {}
- end
- if seen[name] then
- return nil
- end
- seen[name] = true
- return seen
-end
-
-
-function find_recursive_depends(list, name, seen)
- seen = check_recursion(name, seen)
- if not seen then
- return
- end
- local bt = get_table_val(triggers.list[name].belongs_to) or {}
- for i, n in ipairs(bt) do
- table.insert(list, n)
- find_recursive_depends(list, n, seen)
- end
-end
-
-function check_trigger_depth(list, name)
- if name == nil then
- return
- end
-
- local n = list[name]
- if n == nil then
- return
- end
-
- list[name] = nil
- return check_trigger_depth(list, n)
-end
-
-function find_triggers(tuple)
- local pos = triggers.uci[tuple.package]
- if pos == nil then
- return {}
- end
-
- local tlist = {}
- find_section_triggers(tlist, pos[".all"], tuple)
- find_section_triggers(tlist, pos[tuple.section[".type"]], tuple)
-
- for n, t in pairs(tlist) do
- local dep = {}
- find_recursive_depends(dep, t.id)
- for i, depname in ipairs(dep) do
- check_trigger_depth(tlist, depname)
- end
- end
-
- local nlist = {}
- for n, t in pairs(tlist) do
- if t then
- table.insert(nlist, t)
- end
- end
-
- return nlist
-end
-
-function reset_state()
- assert(io.open("/var/run/uci_trigger", "w")):close()
- if tctx then
- tctx:unload("uci_trigger")
- end
-end
-
-function load_state()
- -- make sure the config file exists before we attempt to load it
- -- uci doesn't like loading nonexistent config files
- local f = assert(io.open("/var/run/uci_trigger", "a")):close()
-
- load_modules()
- triggers.active = {}
- if tctx then
- tctx:unload("uci_trigger")
- else
- tctx = uci.cursor()
- end
- assert(tctx:load("/var/run/uci_trigger"))
- tctx:foreach("uci_trigger", "trigger",
- function(section)
- trigger = triggers.list[section[".name"]]
- if trigger == nil then
- return
- end
-
- active = {}
- triggers.active[trigger.id] = active
-
- local s = get_table_val(section["sections"]) or {}
- for i, v in ipairs(s) do
- active[v] = true
- end
- end
- )
-end
-
-function get_names(list)
- local slist = {}
- for name, val in pairs(list) do
- if val then
- table.insert(slist, name)
- end
- end
- return slist
-end
-
-function check_cancel(name, seen)
- local t = triggers.list[name]
- local dep = get_table_val(t.belongs_to)
- seen = check_recursion(name, seen)
-
- if not t or not dep or not seen then
- return false
- end
-
- for i, v in ipairs(dep) do
- -- only cancel triggers for all sections
- -- if both the current and the parent trigger
- -- are per-section
- local section_only = false
- if t.section_only then
- local tdep = triggers.list[v]
- if tdep then
- section_only = tdep.section_only
- end
- end
-
- if check_cancel(v, seen) then
- return true
- end
- if triggers.active[v] then
- if section_only then
- for n, active in pairs(triggers.active[v]) do
- triggers.active[name][n] = false
- end
- else
- return true
- end
- end
- end
- return false
-end
-
--- trigger api functions
-
-function add(ts)
- for i,t in ipairs(ts) do
- triggers.list[t.id] = t
- match = {}
- if t.package then
- local package = check_table(triggers.uci, t.package)
- add_trigger_section(package, t)
- triggers.list[t.id] = t
- end
- end
-end
-
-function save_trigger(name)
- if triggers.active[name] then
- local slist = get_names(triggers.active[name])
- if #slist > 0 then
- tctx:set("uci_trigger", name, "sections", slist)
- end
- else
- tctx:delete("uci_trigger", name)
- end
-end
-
-function set(data, cursor)
- assert(data ~= nil)
- if cursor == nil then
- cursor = tmp_cursor or uci.cursor()
- tmp_cursor = uci.cursor
- end
-
- local tuple = {
- package = data[1],
- section = data[2],
- option = data[3],
- value = data[4]
- }
- assert(cursor:load(tuple.package))
-
- load_state()
- local section = cursor:get_all(tuple.package, tuple.section)
- if (section == nil) then
- if option ~= nil then
- return
- end
- section = {
- [".type"] = value
- }
- if tuple.section == nil then
- tuple.section = ""
- section[".anonymous"] = true
- end
- section[".name"] = tuple.section
- end
- tuple.section = section
-
- local ts = find_triggers(tuple)
- for i, t in ipairs(ts) do
- local active = triggers.active[t.id]
- if not active then
- active = {}
- triggers.active[t.id] = active
- tctx:set("uci_trigger", t.id, "trigger")
- end
- if section[".name"] then
- active[section[".name"]] = true
- end
- save_trigger(t.id)
- end
- tctx:save("uci_trigger")
-end
-
-function get_description(trigger, sections)
- if not trigger.title then
- return trigger.id
- end
- local desc = trigger.title
- if trigger.section_only and sections and #sections > 0 then
- desc = desc .. " (" .. table.concat(sections, ", ") .. ")"
- end
- return desc
-end
-
-function get_active()
- local slist = {}
-
- if triggers == nil then
- load_state()
- end
- for name, val in pairs(triggers.active) do
- if val and not check_cancel(name) then
- local sections = {}
- for name, active in pairs(triggers.active[name]) do
- if active then
- table.insert(sections, name)
- end
- end
- table.insert(slist, { triggers.list[name], sections })
- end
- end
- return slist
-end
-
-function set_active(trigger, sections)
- if triggers == nil then
- load_state()
- end
- if not triggers.list[trigger] then
- return
- end
- if triggers.active[trigger] == nil then
- tctx:set("uci_trigger", trigger, "trigger")
- triggers.active[trigger] = {}
- end
- local active = triggers.active[trigger]
- if triggers.list[trigger].section_only or sections ~= nil then
- for i, t in ipairs(sections) do
- triggers.active[trigger][t] = true
- end
- end
- save_trigger(trigger)
- tctx:save("uci_trigger")
-end
-
-function clear_active(trigger, sections)
- if triggers == nil then
- load_state()
- end
- if triggers.list[trigger] == nil or triggers.active[trigger] == nil then
- return
- end
- local active = triggers.active[trigger]
- if not triggers.list[trigger].section_only or sections == nil then
- triggers.active[trigger] = nil
- else
- for i, t in ipairs(sections) do
- triggers.active[trigger][t] = false
- end
- end
- save_trigger(trigger)
- tctx:save("uci_trigger")
-end
-
-function run(ts)
- if ts == nil then
- ts = get_active()
- end
- for i, t in ipairs(ts) do
- local trigger = t[1]
- local sections = t[2]
- local actions = get_table_val(trigger.action, "function") or {}
- for ai, a in ipairs(actions) do
- if not trigger.section_only then
- sections = { "" }
- end
- for si, s in ipairs(sections) do
- if a(s) then
- tctx:delete("uci_trigger", trigger.id)
- tctx:save("uci_trigger")
- end
- end
- end
- end
-end
-
--- helper functions
-
-function system_command(arg)
- local cmd = arg
- return function(arg)
- return os.execute(cmd:format(arg)) == 0
- end
-end
-
-function service_restart(arg)
- return system_command("/etc/init.d/" .. arg .. " restart")
-end
projects / openwrt.git / commitdiff