+--[[
+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.fs")
+require("ffluci.sys")
+
+-- 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
+
+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[config]
+ else
+ return nil, r2
+ end
+end
+
+function Session.set(self, config, section, option, value)
+ return self:_uci2("set " .. _path(config, section, option, value))
+end
+
+
+
+-- 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
+
+ tbl = {}
+
+ for k,line in pairs(res) do
+ c, s, t = line:match("^([^.]-)%.([^.]-)=(.-)$")
+ if c then
+ tbl[c] = tbl[c] or {}
+ tbl[c][".order"] = tbl[c][".order"] or {}
+
+ tbl[c][s] = {}
+ table.insert(tbl[c][".order"], s)
+ tbl[c][s][".type"] = t
+ end
+
+ c, s, o, v = line:match("^([^.]-)%.([^.]-)%.([^.]-)=(.-)$")
+ if c then
+ tbl[c][s][o] = v
+ end
+ end
+
+ return tbl
+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
\ No newline at end of file
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