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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.wrapper", package.seeall)
require("ffluci.util")
require("ffluci.sys")
-- Session class
Session = ffluci.util.class()
-- Session constructor
function Session.__init__(self, savedir)
self.ucicmd = savedir and "uci -P " .. savedir or "uci"
end
function Session.add(self, config, section_type)
return self:_uci("add " .. _path(config) .. " " .. _path(section_type))
end
function Session.changes(self, config)
return self:_uci("changes " .. _path(config))
end
function Session.commit(self, config)
return self:_uci2("commit " .. _path(config))
end
function Session.del(self, config, section, option)
return self:_uci2("del " .. _path(config, section, option))
end
function Session.get(self, config, section, option)
return self:_uci("get " .. _path(config, section, option))
end
function Session.revert(self, config)
return self:_uci2("revert " .. _path(config))
end
function Session.sections(self, config)
if not config then
return nil
end
local r1, r2 = self:_uci3("show " .. _path(config))
if type(r1) == "table" then
return r1, r2
else
return nil, r2
end
end
function Session.set(self, config, section, option, value)
return self:_uci2("set " .. _path(config, section, option, value))
end
function Session.synchronize(self) end
-- Dummy transaction functions
function Session.t_load(self) end
function Session.t_save(self) end
Session.t_add = Session.add
Session.t_commit = Session.commit
Session.t_del = Session.del
Session.t_get = Session.get
Session.t_revert = Session.revert
Session.t_sections = Session.sections
Session.t_set = Session.set
-- Internal functions --
function Session._uci(self, cmd)
local res = ffluci.sys.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.sys.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.sys.execl(self.ucicmd .. " 2>&1 " .. cmd)
if res[1] and res[1]:sub(1, self.ucicmd:len()+1) == self.ucicmd..":" then
return nil, res[1]
end
local tbl = {}
local ord = {}
for k,line in pairs(res) do
c, s, t = line:match("^([^.]-)%.([^.]-)=(.-)$")
if c then
tbl[s] = {}
table.insert(ord, s)
tbl[s][".type"] = t
end
c, s, o, v = line:match("^([^.]-)%.([^.]-)%.([^.]-)=(.-)$")
if c then
tbl[s][o] = v
end
end
return tbl, ord
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 v then
v = tostring(v)
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
end
return result
end
|
