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--[[
FFLuCI - System library
Description:
Utilities for interaction with the Linux system
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.sys", package.seeall)
require("posix")
-- Runs "command" and returns its output
function exec(command)
local pp = io.popen(command)
local data = pp:read("*a")
pp:close()
return data
end
-- Runs "command" and returns its output as a array of lines
function execl(command)
local pp = io.popen(command)
local line = ""
local data = {}
while true do
line = pp:read()
if (line == nil) then break end
table.insert(data, line)
end
pp:close()
return data
end
-- Returns the hostname
function hostname()
return io.lines("/proc/sys/kernel/hostname")()
end
-- Returns the load average
function loadavg()
local loadavg = io.lines("/proc/loadavg")()
return loadavg:match("^(.-) (.-) (.-) (.-) (.-)$")
end
-- Reboots the system
function reboot()
return os.execute("reboot >/dev/null 2>&1")
end
group = {}
group.getgroup = posix.getgroup
net = {}
-- Returns all available network interfaces
function net.devices()
local devices = {}
for line in io.lines("/proc/net/dev") do
table.insert(devices, line:match(" *(.-):"))
end
return devices
end
process = {}
process.info = posix.getpid
-- Sets the gid of a process
function process.setgroup(pid, gid)
return posix.setpid("g", pid, gid)
end
-- Sets the uid of a process
function process.setuser(pid, uid)
return posix.setpid("u", pid, uid)
end
user = {}
-- returns user information to a given uid
user.getuser = posix.getpasswd
-- Changes the user password of given user
function user.setpasswd(user, pwd)
if pwd then
pwd = pwd:gsub("'", "")
end
if user then
user = user:gsub("'", "")
end
local cmd = "(echo '"..pwd.."';sleep 1;echo '"..pwd.."')|"
cmd = cmd .. "passwd '"..user.."' >/dev/null 2>&1"
return os.execute(cmd)
end
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