2 FFLuCI - System library
5 Utilities for interaction with the Linux system
11 Copyright 2008 Steven Barth <steven@midlink.org>
13 Licensed under the Apache License, Version 2.0 (the "License");
14 you may not use this file except in compliance with the License.
15 You may obtain a copy of the License at
17 http://www.apache.org/licenses/LICENSE-2.0
19 Unless required by applicable law or agreed to in writing, software
20 distributed under the License is distributed on an "AS IS" BASIS,
21 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
22 See the License for the specific language governing permissions and
23 limitations under the License.
27 module("ffluci.sys", package.seeall)
30 -- Runs "command" and returns its output
31 function exec(command)
32 local pp = io.popen(command)
33 local data = pp:read("*a")
39 -- Runs "command" and returns its output as a array of lines
40 function execl(command)
41 local pp = io.popen(command)
47 if (line == nil) then break end
48 table.insert(data, line)
55 -- Returns the hostname
57 return io.lines("/proc/sys/kernel/hostname")()
60 -- Returns the load average
62 local loadavg = io.lines("/proc/loadavg")()
63 return loadavg:match("^(.-) (.-) (.-) (.-) (.-)$")
68 return os.execute("reboot >/dev/null 2>&1")
73 group.getgroup = posix.getgroup
76 -- Returns all available network interfaces
77 function net.devices()
79 for line in io.lines("/proc/net/dev") do
80 table.insert(devices, line:match(" *(.-):"))
86 process.info = posix.getpid
88 -- Sets the gid of a process
89 function process.setgroup(pid, gid)
90 return posix.setpid("g", pid, gid)
93 -- Sets the uid of a process
94 function process.setuser(pid, uid)
95 return posix.setpid("u", pid, uid)
99 -- returns user information to a given uid
100 user.getuser = posix.getpasswd
102 -- Changes the user password of given user
103 function user.setpasswd(user, pwd)
105 pwd = pwd:gsub("'", "")
109 user = user:gsub("'", "")
112 local cmd = "(echo '"..pwd.."';sleep 1;echo '"..pwd.."')|"
113 cmd = cmd .. "passwd '"..user.."' >/dev/null 2>&1"
114 return os.execute(cmd)