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+--[[
+LuCI - 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.
+
+]]--
+
+
+local io = require "io"
+local os = require "os"
+local table = require "table"
+local nixio = require "nixio"
+local fs = require "nixio.fs"
+local uci = require "luci.model.uci"
+
+local luci = {}
+luci.util = require "luci.util"
+luci.ip = require "luci.ip"
+
+local tonumber, ipairs, pairs, pcall, type, next, setmetatable, require, select =
+ tonumber, ipairs, pairs, pcall, type, next, setmetatable, require, select
+
+
+--- LuCI Linux and POSIX system utilities.
+module "luci.sys"
+
+--- Execute a given shell command and return the error code
+-- @class function
+-- @name call
+-- @param ... Command to call
+-- @return Error code of the command
+function call(...)
+ return os.execute(...) / 256
+end
+
+--- Execute a given shell command and capture its standard output
+-- @class function
+-- @name exec
+-- @param command Command to call
+-- @return String containg the return the output of the command
+exec = luci.util.exec
+
+--- Retrieve information about currently mounted file systems.
+-- @return Table containing mount information
+function mounts()
+ local data = {}
+ local k = {"fs", "blocks", "used", "available", "percent", "mountpoint"}
+ local ps = luci.util.execi("df")
+
+ if not ps then
+ return
+ else
+ ps()
+ end
+
+ for line in ps do
+ local row = {}
+
+ local j = 1
+ for value in line:gmatch("[^%s]+") do
+ row[k[j]] = value
+ j = j + 1
+ end
+
+ if row[k[1]] then
+
+ -- this is a rather ugly workaround to cope with wrapped lines in
+ -- the df output:
+ --
+ -- /dev/scsi/host0/bus0/target0/lun0/part3
+ -- 114382024 93566472 15005244 86% /mnt/usb
+ --
+
+ if not row[k[2]] then
+ j = 2
+ line = ps()
+ for value in line:gmatch("[^%s]+") do
+ row[k[j]] = value
+ j = j + 1
+ end
+ end
+
+ table.insert(data, row)
+ end
+ end
+
+ return data
+end
+
+--- Retrieve environment variables. If no variable is given then a table
+-- containing the whole environment is returned otherwise this function returns
+-- the corresponding string value for the given name or nil if no such variable
+-- exists.
+-- @class function
+-- @name getenv
+-- @param var Name of the environment variable to retrieve (optional)
+-- @return String containg the value of the specified variable
+-- @return Table containing all variables if no variable name is given
+getenv = nixio.getenv
+
+--- Get or set the current hostname.
+-- @param String containing a new hostname to set (optional)
+-- @return String containing the system hostname
+function hostname(newname)
+ if type(newname) == "string" and #newname > 0 then
+ fs.writefile( "/proc/sys/kernel/hostname", newname )
+ return newname
+ else
+ return nixio.uname().nodename
+ end
+end
+
+--- Returns the contents of a documented referred by an URL.
+-- @param url The URL to retrieve
+-- @param stream Return a stream instead of a buffer
+-- @param target Directly write to target file name
+-- @return String containing the contents of given the URL
+function httpget(url, stream, target)
+ if not target then
+ local source = stream and io.popen or luci.util.exec
+ return source("wget -qO- '"..url:gsub("'", "").."'")
+ else
+ return os.execute("wget -qO '%s' '%s'" %
+ {target:gsub("'", ""), url:gsub("'", "")})
+ end
+end
+
+--- Returns the system load average values.
+-- @return String containing the average load value 1 minute ago
+-- @return String containing the average load value 5 minutes ago
+-- @return String containing the average load value 15 minutes ago
+function loadavg()
+ local info = nixio.sysinfo()
+ return info.loads[1], info.loads[2], info.loads[3]
+end
+
+--- Initiate a system reboot.
+-- @return Return value of os.execute()
+function reboot()
+ return os.execute("reboot >/dev/null 2>&1")
+end
+
+--- Returns the system type, cpu name and installed physical memory.
+-- @return String containing the system or platform identifier
+-- @return String containing hardware model information
+-- @return String containing the total memory amount in kB
+-- @return String containing the memory used for caching in kB
+-- @return String containing the memory used for buffering in kB
+-- @return String containing the free memory amount in kB
+-- @return String containing the cpu bogomips (number)
+function sysinfo()
+ local cpuinfo = fs.readfile("/proc/cpuinfo")
+ local meminfo = fs.readfile("/proc/meminfo")
+
+ local memtotal = tonumber(meminfo:match("MemTotal:%s*(%d+)"))
+ local memcached = tonumber(meminfo:match("\nCached:%s*(%d+)"))
+ local memfree = tonumber(meminfo:match("MemFree:%s*(%d+)"))
+ local membuffers = tonumber(meminfo:match("Buffers:%s*(%d+)"))
+ local bogomips = tonumber(cpuinfo:match("[Bb]ogo[Mm][Ii][Pp][Ss].-: ([^\n]+)")) or 0
+ local swaptotal = tonumber(meminfo:match("SwapTotal:%s*(%d+)"))
+ local swapcached = tonumber(meminfo:match("SwapCached:%s*(%d+)"))
+ local swapfree = tonumber(meminfo:match("SwapFree:%s*(%d+)"))
+
+ local system =
+ cpuinfo:match("system type\t+: ([^\n]+)") or
+ cpuinfo:match("Processor\t+: ([^\n]+)") or
+ cpuinfo:match("model name\t+: ([^\n]+)")
+
+ local model =
+ luci.util.pcdata(fs.readfile("/tmp/sysinfo/model")) or
+ cpuinfo:match("machine\t+: ([^\n]+)") or
+ cpuinfo:match("Hardware\t+: ([^\n]+)") or
+ luci.util.pcdata(fs.readfile("/proc/diag/model")) or
+ nixio.uname().machine or
+ system
+
+ return system, model, memtotal, memcached, membuffers, memfree, bogomips, swaptotal, swapcached, swapfree
+end
+
+--- Retrieves the output of the "logread" command.
+-- @return String containing the current log buffer
+function syslog()
+ return luci.util.exec("logread")
+end
+
+--- Retrieves the output of the "dmesg" command.
+-- @return String containing the current log buffer
+function dmesg()
+ return luci.util.exec("dmesg")
+end
+
+--- Generates a random id with specified length.
+-- @param bytes Number of bytes for the unique id
+-- @return String containing hex encoded id
+function uniqueid(bytes)
+ local rand = fs.readfile("/dev/urandom", bytes)
+ return rand and nixio.bin.hexlify(rand)
+end
+
+--- Returns the current system uptime stats.
+-- @return String containing total uptime in seconds
+function uptime()
+ return nixio.sysinfo().uptime
+end
+
+
+--- LuCI system utilities / network related functions.
+-- @class module
+-- @name luci.sys.net
+net = {}
+
+--- Returns the current arp-table entries as two-dimensional table.
+-- @return Table of table containing the current arp entries.
+-- The following fields are defined for arp entry objects:
+-- { "IP address", "HW address", "HW type", "Flags", "Mask", "Device" }
+function net.arptable(callback)
+ local arp = (not callback) and {} or nil
+ local e, r, v
+ if fs.access("/proc/net/arp") then
+ for e in io.lines("/proc/net/arp") do
+ local r = { }, v
+ for v in e:gmatch("%S+") do
+ r[#r+1] = v
+ end
+
+ if r[1] ~= "IP" then
+ local x = {
+ ["IP address"] = r[1],
+ ["HW type"] = r[2],
+ ["Flags"] = r[3],
+ ["HW address"] = r[4],
+ ["Mask"] = r[5],
+ ["Device"] = r[6]
+ }
+
+ if callback then
+ callback(x)
+ else
+ arp = arp or { }
+ arp[#arp+1] = x
+ end
+ end
+ end
+ end
+ return arp
+end
+
+local function _nethints(what, callback)
+ local _, k, e, mac, ip, name
+ local cur = uci.cursor()
+ local ifn = { }
+ local hosts = { }
+
+ local function _add(i, ...)
+ local k = select(i, ...)
+ if k then
+ if not hosts[k] then hosts[k] = { } end
+ hosts[k][1] = select(1, ...) or hosts[k][1]
+ hosts[k][2] = select(2, ...) or hosts[k][2]
+ hosts[k][3] = select(3, ...) or hosts[k][3]
+ hosts[k][4] = select(4, ...) or hosts[k][4]
+ end
+ end
+
+ if fs.access("/proc/net/arp") then
+ for e in io.lines("/proc/net/arp") do
+ ip, mac = e:match("^([%d%.]+)%s+%S+%s+%S+%s+([a-fA-F0-9:]+)%s+")
+ if ip and mac then
+ _add(what, mac:upper(), ip, nil, nil)
+ end
+ end
+ end
+
+ if fs.access("/etc/ethers") then
+ for e in io.lines("/etc/ethers") do
+ mac, ip = e:match("^([a-f0-9]%S+) (%S+)")
+ if mac and ip then
+ _add(what, mac:upper(), ip, nil, nil)
+ end
+ end
+ end
+
+ if fs.access("/var/dhcp.leases") then
+ for e in io.lines("/var/dhcp.leases") do
+ mac, ip, name = e:match("^%d+ (%S+) (%S+) (%S+)")
+ if mac and ip then
+ _add(what, mac:upper(), ip, nil, name ~= "*" and name)
+ end
+ end
+ end
+
+ cur:foreach("dhcp", "host",
+ function(s)
+ for mac in luci.util.imatch(s.mac) do
+ _add(what, mac:upper(), s.ip, nil, s.name)
+ end
+ end)
+
+ for _, e in ipairs(nixio.getifaddrs()) do
+ if e.name ~= "lo" then
+ ifn[e.name] = ifn[e.name] or { }
+ if e.family == "packet" and e.addr and #e.addr == 17 then
+ ifn[e.name][1] = e.addr:upper()
+ elseif e.family == "inet" then
+ ifn[e.name][2] = e.addr
+ elseif e.family == "inet6" then
+ ifn[e.name][3] = e.addr
+ end
+ end
+ end
+
+ for _, e in pairs(ifn) do
+ if e[what] and (e[2] or e[3]) then
+ _add(what, e[1], e[2], e[3], e[4])
+ end
+ end
+
+ for _, e in luci.util.kspairs(hosts) do
+ callback(e[1], e[2], e[3], e[4])
+ end
+end
+
+--- Returns a two-dimensional table of mac address hints.
+-- @return Table of table containing known hosts from various sources.
+-- Each entry contains the values in the following order:
+-- [ "mac", "name" ]
+function net.mac_hints(callback)
+ if callback then
+ _nethints(1, function(mac, v4, v6, name)
+ name = name or nixio.getnameinfo(v4 or v6, nil, 100) or v4
+ if name and name ~= mac then
+ callback(mac, name or nixio.getnameinfo(v4 or v6, nil, 100) or v4)
+ end
+ end)
+ else
+ local rv = { }
+ _nethints(1, function(mac, v4, v6, name)
+ name = name or nixio.getnameinfo(v4 or v6, nil, 100) or v4
+ if name and name ~= mac then
+ rv[#rv+1] = { mac, name or nixio.getnameinfo(v4 or v6, nil, 100) or v4 }
+ end
+ end)
+ return rv
+ end
+end
+
+--- Returns a two-dimensional table of IPv4 address hints.
+-- @return Table of table containing known hosts from various sources.
+-- Each entry contains the values in the following order:
+-- [ "ip", "name" ]
+function net.ipv4_hints(callback)
+ if callback then
+ _nethints(2, function(mac, v4, v6, name)
+ name = name or nixio.getnameinfo(v4, nil, 100) or mac
+ if name and name ~= v4 then
+ callback(v4, name)
+ end
+ end)
+ else
+ local rv = { }
+ _nethints(2, function(mac, v4, v6, name)
+ name = name or nixio.getnameinfo(v4, nil, 100) or mac
+ if name and name ~= v4 then
+ rv[#rv+1] = { v4, name }
+ end
+ end)
+ return rv
+ end
+end
+
+--- Returns a two-dimensional table of IPv6 address hints.
+-- @return Table of table containing known hosts from various sources.
+-- Each entry contains the values in the following order:
+-- [ "ip", "name" ]
+function net.ipv6_hints(callback)
+ if callback then
+ _nethints(3, function(mac, v4, v6, name)
+ name = name or nixio.getnameinfo(v6, nil, 100) or mac
+ if name and name ~= v6 then
+ callback(v6, name)
+ end
+ end)
+ else
+ local rv = { }
+ _nethints(3, function(mac, v4, v6, name)
+ name = name or nixio.getnameinfo(v6, nil, 100) or mac
+ if name and name ~= v6 then
+ rv[#rv+1] = { v6, name }
+ end
+ end)
+ return rv
+ end
+end
+
+--- Returns conntrack information
+-- @return Table with the currently tracked IP connections
+function net.conntrack(callback)
+ local connt = {}
+ if fs.access("/proc/net/nf_conntrack", "r") then
+ for line in io.lines("/proc/net/nf_conntrack") do
+ line = line:match "^(.-( [^ =]+=).-)%2"
+ local entry, flags = _parse_mixed_record(line, " +")
+ if flags[6] ~= "TIME_WAIT" then
+ entry.layer3 = flags[1]
+ entry.layer4 = flags[3]
+ for i=1, #entry do
+ entry[i] = nil
+ end
+
+ if callback then
+ callback(entry)
+ else
+ connt[#connt+1] = entry
+ end
+ end
+ end
+ elseif fs.access("/proc/net/ip_conntrack", "r") then
+ for line in io.lines("/proc/net/ip_conntrack") do
+ line = line:match "^(.-( [^ =]+=).-)%2"
+ local entry, flags = _parse_mixed_record(line, " +")
+ if flags[4] ~= "TIME_WAIT" then
+ entry.layer3 = "ipv4"
+ entry.layer4 = flags[1]
+ for i=1, #entry do
+ entry[i] = nil
+ end
+
+ if callback then
+ callback(entry)
+ else
+ connt[#connt+1] = entry
+ end
+ end
+ end
+ else
+ return nil
+ end
+ return connt
+end
+
+--- Determine the current IPv4 default route. If multiple default routes exist,
+-- return the one with the lowest metric.
+-- @return Table with the properties of the current default route.
+-- The following fields are defined:
+-- { "dest", "gateway", "metric", "refcount", "usecount", "irtt",
+-- "flags", "device" }
+function net.defaultroute()
+ local route
+
+ net.routes(function(rt)
+ if rt.dest:prefix() == 0 and (not route or route.metric > rt.metric) then
+ route = rt
+ end
+ end)
+
+ return route
+end
+
+--- Determine the current IPv6 default route. If multiple default routes exist,
+-- return the one with the lowest metric.
+-- @return Table with the properties of the current default route.
+-- The following fields are defined:
+-- { "source", "dest", "nexthop", "metric", "refcount", "usecount",
+-- "flags", "device" }
+function net.defaultroute6()
+ local route
+
+ net.routes6(function(rt)
+ if rt.dest:prefix() == 0 and rt.device ~= "lo" and
+ (not route or route.metric > rt.metric)
+ then
+ route = rt
+ end
+ end)
+
+ if not route then
+ local global_unicast = luci.ip.IPv6("2000::/3")
+ net.routes6(function(rt)
+ if rt.dest:equal(global_unicast) and
+ (not route or route.metric > rt.metric)
+ then
+ route = rt
+ end
+ end)
+ end
+
+ return route
+end
+
+--- Determine the names of available network interfaces.
+-- @return Table containing all current interface names
+function net.devices()
+ local devs = {}
+ for k, v in ipairs(nixio.getifaddrs()) do
+ if v.family == "packet" then
+ devs[#devs+1] = v.name
+ end
+ end
+ return devs
+end
+
+
+--- Return information about available network interfaces.
+-- @return Table containing all current interface names and their information
+function net.deviceinfo()
+ local devs = {}
+ for k, v in ipairs(nixio.getifaddrs()) do
+ if v.family == "packet" then
+ local d = v.data
+ d[1] = d.rx_bytes
+ d[2] = d.rx_packets
+ d[3] = d.rx_errors
+ d[4] = d.rx_dropped
+ d[5] = 0
+ d[6] = 0
+ d[7] = 0
+ d[8] = d.multicast
+ d[9] = d.tx_bytes
+ d[10] = d.tx_packets
+ d[11] = d.tx_errors
+ d[12] = d.tx_dropped
+ d[13] = 0
+ d[14] = d.collisions
+ d[15] = 0
+ d[16] = 0
+ devs[v.name] = d
+ end
+ end
+ return devs
+end
+
+
+-- Determine the MAC address belonging to the given IP address.
+-- @param ip IPv4 address
+-- @return String containing the MAC address or nil if it cannot be found
+function net.ip4mac(ip)
+ local mac = nil
+ net.arptable(function(e)
+ if e["IP address"] == ip then
+ mac = e["HW address"]
+ end
+ end)
+ return mac
+end
+
+--- Returns the current kernel routing table entries.
+-- @return Table of tables with properties of the corresponding routes.
+-- The following fields are defined for route entry tables:
+-- { "dest", "gateway", "metric", "refcount", "usecount", "irtt",
+-- "flags", "device" }
+function net.routes(callback)
+ local routes = { }
+
+ for line in io.lines("/proc/net/route") do
+
+ local dev, dst_ip, gateway, flags, refcnt, usecnt, metric,
+ dst_mask, mtu, win, irtt = line:match(
+ "([^%s]+)\t([A-F0-9]+)\t([A-F0-9]+)\t([A-F0-9]+)\t" ..
+ "(%d+)\t(%d+)\t(%d+)\t([A-F0-9]+)\t(%d+)\t(%d+)\t(%d+)"
+ )
+
+ if dev then
+ gateway = luci.ip.Hex( gateway, 32, luci.ip.FAMILY_INET4 )
+ dst_mask = luci.ip.Hex( dst_mask, 32, luci.ip.FAMILY_INET4 )
+ dst_ip = luci.ip.Hex(
+ dst_ip, dst_mask:prefix(dst_mask), luci.ip.FAMILY_INET4
+ )
+
+ local rt = {
+ dest = dst_ip,
+ gateway = gateway,
+ metric = tonumber(metric),
+ refcount = tonumber(refcnt),
+ usecount = tonumber(usecnt),
+ mtu = tonumber(mtu),
+ window = tonumber(window),
+ irtt = tonumber(irtt),
+ flags = tonumber(flags, 16),
+ device = dev
+ }
+
+ if callback then
+ callback(rt)
+ else
+ routes[#routes+1] = rt
+ end
+ end
+ end
+
+ return routes
+end
+
+--- Returns the current ipv6 kernel routing table entries.
+-- @return Table of tables with properties of the corresponding routes.
+-- The following fields are defined for route entry tables:
+-- { "source", "dest", "nexthop", "metric", "refcount", "usecount",
+-- "flags", "device" }
+function net.routes6(callback)
+ if fs.access("/proc/net/ipv6_route", "r") then
+ local routes = { }
+
+ for line in io.lines("/proc/net/ipv6_route") do
+
+ local dst_ip, dst_prefix, src_ip, src_prefix, nexthop,
+ metric, refcnt, usecnt, flags, dev = line:match(
+ "([a-f0-9]+) ([a-f0-9]+) " ..
+ "([a-f0-9]+) ([a-f0-9]+) " ..
+ "([a-f0-9]+) ([a-f0-9]+) " ..
+ "([a-f0-9]+) ([a-f0-9]+) " ..
+ "([a-f0-9]+) +([^%s]+)"
+ )
+
+ if dst_ip and dst_prefix and
+ src_ip and src_prefix and
+ nexthop and metric and
+ refcnt and usecnt and
+ flags and dev
+ then
+ src_ip = luci.ip.Hex(
+ src_ip, tonumber(src_prefix, 16), luci.ip.FAMILY_INET6, false
+ )
+
+ dst_ip = luci.ip.Hex(
+ dst_ip, tonumber(dst_prefix, 16), luci.ip.FAMILY_INET6, false
+ )
+
+ nexthop = luci.ip.Hex( nexthop, 128, luci.ip.FAMILY_INET6, false )
+
+ local rt = {
+ source = src_ip,
+ dest = dst_ip,
+ nexthop = nexthop,
+ metric = tonumber(metric, 16),
+ refcount = tonumber(refcnt, 16),
+ usecount = tonumber(usecnt, 16),
+ flags = tonumber(flags, 16),
+ device = dev,
+
+ -- lua number is too small for storing the metric
+ -- add a metric_raw field with the original content
+ metric_raw = metric
+ }
+
+ if callback then
+ callback(rt)
+ else
+ routes[#routes+1] = rt
+ end
+ end
+ end
+
+ return routes
+ end
+end
+
+--- Tests whether the given host responds to ping probes.
+-- @param host String containing a hostname or IPv4 address
+-- @return Number containing 0 on success and >= 1 on error
+function net.pingtest(host)
+ return os.execute("ping -c1 '"..host:gsub("'", '').."' >/dev/null 2>&1")
+end
+
+
+--- LuCI system utilities / process related functions.
+-- @class module
+-- @name luci.sys.process
+process = {}
+
+--- Get the current process id.
+-- @class function
+-- @name process.info
+-- @return Number containing the current pid
+function process.info(key)
+ local s = {uid = nixio.getuid(), gid = nixio.getgid()}
+ return not key and s or s[key]
+end
+
+--- Retrieve information about currently running processes.
+-- @return Table containing process information
+function process.list()
+ local data = {}
+ local k
+ local ps = luci.util.execi("/bin/busybox top -bn1")
+
+ if not ps then
+ return
+ end
+
+ for line in ps do
+ local pid, ppid, user, stat, vsz, mem, cpu, cmd = line:match(
+ "^ *(%d+) +(%d+) +(%S.-%S) +([RSDZTW][W ][<N ]) +(%d+) +(%d+%%) +(%d+%%) +(.+)"
+ )
+
+ local idx = tonumber(pid)
+ if idx then
+ data[idx] = {
+ ['PID'] = pid,
+ ['PPID'] = ppid,
+ ['USER'] = user,
+ ['STAT'] = stat,
+ ['VSZ'] = vsz,
+ ['%MEM'] = mem,
+ ['%CPU'] = cpu,
+ ['COMMAND'] = cmd
+ }
+ end
+ end
+
+ return data
+end
+
+--- Set the gid of a process identified by given pid.
+-- @param gid Number containing the Unix group id
+-- @return Boolean indicating successful operation
+-- @return String containing the error message if failed
+-- @return Number containing the error code if failed
+function process.setgroup(gid)
+ return nixio.setgid(gid)
+end
+
+--- Set the uid of a process identified by given pid.
+-- @param uid Number containing the Unix user id
+-- @return Boolean indicating successful operation
+-- @return String containing the error message if failed
+-- @return Number containing the error code if failed
+function process.setuser(uid)
+ return nixio.setuid(uid)
+end
+
+--- Send a signal to a process identified by given pid.
+-- @class function
+-- @name process.signal
+-- @param pid Number containing the process id
+-- @param sig Signal to send (default: 15 [SIGTERM])
+-- @return Boolean indicating successful operation
+-- @return Number containing the error code if failed
+process.signal = nixio.kill
+
+
+--- LuCI system utilities / user related functions.
+-- @class module
+-- @name luci.sys.user
+user = {}
+
+--- Retrieve user informations for given uid.
+-- @class function
+-- @name getuser
+-- @param uid Number containing the Unix user id
+-- @return Table containing the following fields:
+-- { "uid", "gid", "name", "passwd", "dir", "shell", "gecos" }
+user.getuser = nixio.getpw
+
+--- Retrieve the current user password hash.
+-- @param username String containing the username to retrieve the password for
+-- @return String containing the hash or nil if no password is set.
+-- @return Password database entry
+function user.getpasswd(username)
+ local pwe = nixio.getsp and nixio.getsp(username) or nixio.getpw(username)
+ local pwh = pwe and (pwe.pwdp or pwe.passwd)
+ if not pwh or #pwh < 1 or pwh == "!" or pwh == "x" then
+ return nil, pwe
+ else
+ return pwh, pwe
+ end
+end
+
+--- Test whether given string matches the password of a given system user.
+-- @param username String containing the Unix user name
+-- @param pass String containing the password to compare
+-- @return Boolean indicating wheather the passwords are equal
+function user.checkpasswd(username, pass)
+ local pwh, pwe = user.getpasswd(username)
+ if pwe then
+ return (pwh == nil or nixio.crypt(pass, pwh) == pwh)
+ end
+ return false
+end
+
+--- Change the password of given user.
+-- @param username String containing the Unix user name
+-- @param password String containing the password to compare
+-- @return Number containing 0 on success and >= 1 on error
+function user.setpasswd(username, password)
+ if password then
+ password = password:gsub("'", [['"'"']])
+ end
+
+ if username then
+ username = username:gsub("'", [['"'"']])
+ end
+
+ return os.execute(
+ "(echo '" .. password .. "'; sleep 1; echo '" .. password .. "') | " ..
+ "passwd '" .. username .. "' >/dev/null 2>&1"
+ )
+end
+
+
+--- LuCI system utilities / wifi related functions.
+-- @class module
+-- @name luci.sys.wifi
+wifi = {}
+
+--- Get wireless information for given interface.
+-- @param ifname String containing the interface name
+-- @return A wrapped iwinfo object instance
+function wifi.getiwinfo(ifname)
+ local stat, iwinfo = pcall(require, "iwinfo")
+
+ if ifname then
+ local c = 0
+ local u = uci.cursor_state()
+ local d, n = ifname:match("^(%w+)%.network(%d+)")
+ if d and n then
+ ifname = d
+ n = tonumber(n)
+ u:foreach("wireless", "wifi-iface",
+ function(s)
+ if s.device == d then
+ c = c + 1
+ if c == n then
+ ifname = s.ifname or s.device
+ return false
+ end
+ end
+ end)
+ elseif u:get("wireless", ifname) == "wifi-device" then
+ u:foreach("wireless", "wifi-iface",
+ function(s)
+ if s.device == ifname and s.ifname then
+ ifname = s.ifname
+ return false
+ end
+ end)
+ end
+
+ local t = stat and iwinfo.type(ifname)
+ local x = t and iwinfo[t] or { }
+ return setmetatable({}, {
+ __index = function(t, k)
+ if k == "ifname" then
+ return ifname
+ elseif x[k] then
+ return x[k](ifname)
+ end
+ end
+ })
+ end
+end
+
+
+--- LuCI system utilities / init related functions.
+-- @class module
+-- @name luci.sys.init
+init = {}
+init.dir = "/etc/init.d/"
+
+--- Get the names of all installed init scripts
+-- @return Table containing the names of all inistalled init scripts
+function init.names()
+ local names = { }
+ for name in fs.glob(init.dir.."*") do
+ names[#names+1] = fs.basename(name)
+ end
+ return names
+end
+
+--- Get the index of he given init script
+-- @param name Name of the init script
+-- @return Numeric index value
+function init.index(name)
+ if fs.access(init.dir..name) then
+ return call("env -i sh -c 'source %s%s enabled; exit ${START:-255}' >/dev/null"
+ %{ init.dir, name })
+ end
+end
+
+local function init_action(action, name)
+ if fs.access(init.dir..name) then
+ return call("env -i %s%s %s >/dev/null" %{ init.dir, name, action })
+ end
+end
+
+--- Test whether the given init script is enabled
+-- @param name Name of the init script
+-- @return Boolean indicating whether init is enabled
+function init.enabled(name)
+ return (init_action("enabled", name) == 0)
+end
+
+--- Enable the given init script
+-- @param name Name of the init script
+-- @return Boolean indicating success
+function init.enable(name)
+ return (init_action("enable", name) == 1)
+end
+
+--- Disable the given init script
+-- @param name Name of the init script
+-- @return Boolean indicating success
+function init.disable(name)
+ return (init_action("disable", name) == 0)
+end
+
+--- Start the given init script
+-- @param name Name of the init script
+-- @return Boolean indicating success
+function init.start(name)
+ return (init_action("start", name) == 0)
+end
+
+--- Stop the given init script
+-- @param name Name of the init script
+-- @return Boolean indicating success
+function init.stop(name)
+ return (init_action("stop", name) == 0)
+end
+
+
+-- Internal functions
+
+function _parse_mixed_record(cnt, delimiter)
+ delimiter = delimiter or " "
+ local data = {}
+ local flags = {}
+
+ for i, l in pairs(luci.util.split(luci.util.trim(cnt), "\n")) do
+ for j, f in pairs(luci.util.split(luci.util.trim(l), delimiter, nil, true)) do
+ local k, x, v = f:match('([^%s][^:=]*) *([:=]*) *"*([^\n"]*)"*')
+
+ if k then
+ if x == "" then
+ table.insert(flags, k)
+ else
+ data[k] = v
+ end
+ end
+ end
+ end
+
+ return data, flags
+end
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 22:36:52 +0000