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--[[
FFLuCI - UCI wrapper library
Description:
Wrapper for the /sbin/uci application, syntax of implemented functions
is comparable to the syntax of the uci application
Any return value of false or nil can be interpreted as an error
FileId:
$Id$
License:
Copyright 2008 Steven Barth <steven@midlink.org>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
]]--
module("ffluci.model.uci", package.seeall)
require("ffluci.util")
require("ffluci.fs")
-- The OS uci command
ucicmd = "uci"
-- Session class
Session = ffluci.util.class()
-- Session constructor
function Session.__init__(self, path, uci)
uci = uci or ucicmd
if path then
self.ucicmd = uci .. " -P " .. path
else
self.ucicmd = uci
end
end
-- The default Session
local default = Session()
-- Wrapper for "uci add"
function Session.add(self, config, section_type)
return self:_uci("add " .. _path(config) .. " " .. _path(section_type))
end
function add(...)
return default:add(...)
end
-- Wrapper for "uci changes"
function Session.changes(self, config)
return self:_uci3("changes " .. _path(config))
end
function change(...)
return default:change(...)
end
-- Wrapper for "uci commit"
function Session.commit(self, config)
return self:_uci2("commit " .. _path(config))
end
function commit(...)
return default:commit(...)
end
-- Wrapper for "uci get"
function Session.get(self, config, section, option)
return self:_uci("get " .. _path(config, section, option))
end
function get(...)
return default:get(...)
end
-- Wrapper for "uci revert"
function Session.revert(self, config)
return self:_uci2("revert " .. _path(config))
end
function revert(...)
return self:revert(...)
end
-- Wrapper for "uci show"
function Session.show(self, config)
return self:_uci3("show " .. _path(config))
end
function show(...)
return default:show(...)
end
-- Wrapper for "uci set"
function Session.set(self, config, section, option, value)
return self:_uci2("set " .. _path(config, section, option, value))
end
function set(...)
return default:set(...)
end
-- Internal functions --
function Session._uci(self, cmd)
local res = ffluci.util.exec(self.ucicmd .. " 2>/dev/null " .. cmd)
if res:len() == 0 then
return nil
else
return res:sub(1, res:len()-1)
end
end
function Session._uci2(self, cmd)
local res = ffluci.util.exec(self.ucicmd .. " 2>&1 " .. cmd)
if res:len() > 0 then
return false, res
else
return true
end
end
function Session._uci3(self, cmd)
local res = ffluci.util.execl(self.ucicmd .. " 2>&1 " .. cmd)
if res[1]:sub(1, ucicmd:len() + 1) == ucicmd .. ":" then
return nil, res[1]
end
table = {}
for k,line in pairs(res) do
c, s, t = line:match("^([^.]-)%.([^.]-)=(.-)$")
if c then
table[c] = table[c] or {}
table[c][s] = {}
table[c][s][".type"] = t
end
c, s, o, v = line:match("^([^.]-)%.([^.]-)%.([^.]-)=(.-)$")
if c then
table[c][s][o] = v
end
end
return table
end
-- Build path (config.section.option=value) and prevent command injection
function _path(...)
local result = ""
-- Not using ipairs because it is not reliable in case of nil arguments
arg.n = nil
for k,v in pairs(arg) do
if k == 1 then
result = "'" .. v:gsub("['.]", "") .. "'"
elseif k < 4 then
result = result .. ".'" .. v:gsub("['.]", "") .. "'"
elseif k == 4 then
result = result .. "='" .. v:gsub("'", "") .. "'"
end
end
return result
end
|
