gluon-core: replace blanks by tabs in gluon.util

package/gluon-core/luasrc/usr/lib/lua/gluon/util.lua

 -- Writes all lines from the file input to the file output except those starting with prefix
 -- Doesn't close the output file, but returns the file object
 local function do_filter_prefix(input, output, prefix)
-  local f = io.open(output, 'w+')
-  local l = prefix:len()
+	local f = io.open(output, 'w+')
+	local l = prefix:len()
 
-  for line in io.lines(input) do
-    if line:sub(1, l) ~= prefix then
-      f:write(line, '\n')
-    end
-  end
+	for line in io.lines(input) do
+		if line:sub(1, l) ~= prefix then
+			f:write(line, '\n')
+		end
+	end
 
-  return f
+	return f
 end
 
 
 local function escape_args(ret, arg0, ...)
-  if not arg0 then
-    return ret
-  end
+	if not arg0 then
+		return ret
+	end
 
-  return escape_args(ret .. "'" .. string.gsub(arg0, "'", "'\\''") .. "' ", ...)
+	return escape_args(ret .. "'" .. string.gsub(arg0, "'", "'\\''") .. "' ", ...)
 end
 
 
@@ -38,79 +38,78 @@ local uci = require('luci.model.uci').cursor()
 local lutil = require 'luci.util'
 local fs = require 'nixio.fs'
 
-
 module 'gluon.util'
 
 function exec(...)
-  return os.execute(escape_args('', 'exec', ...))
+	return os.execute(escape_args('', 'exec', ...))
 end
 
 -- Removes all lines starting with a prefix from a file, optionally adding a new one
 function replace_prefix(file, prefix, add)
-  local tmp = file .. '.tmp'
-  local f = do_filter_prefix(file, tmp, prefix)
-  if add then
-  	f:write(add)
-  end
-  f:close()
-  os.rename(tmp, file)
+	local tmp = file .. '.tmp'
+	local f = do_filter_prefix(file, tmp, prefix)
+	if add then
+		f:write(add)
+	end
+	f:close()
+	os.rename(tmp, file)
 end
 
 function readline(fd)
-  local line = fd:read('*l')
-  fd:close()
-  return line
+	local line = fd:read('*l')
+	fd:close()
+	return line
 end
 
 function lock(file)
-  exec('lock', file)
+	exec('lock', file)
 end
 
 function unlock(file)
-  exec('lock', '-u', file)
+	exec('lock', '-u', file)
 end
 
 function node_id()
-  return string.gsub(sysconfig.primary_mac, ':', '')
+	return string.gsub(sysconfig.primary_mac, ':', '')
 end
 
 
 local function find_phy_by_path(path)
-  for phy in fs.glob('/sys/devices/' .. path .. '/ieee80211/phy*') do
-    return phy:match('([^/]+)$')
-  end
+	for phy in fs.glob('/sys/devices/' .. path .. '/ieee80211/phy*') do
+		return phy:match('([^/]+)$')
+	end
 end
 
 local function find_phy_by_macaddr(macaddr)
-  local addr = macaddr:lower()
-  for file in fs.glob('/sys/class/ieee80211/*/macaddress') do
-    if lutil.trim(fs.readfile(file)) == addr then
-      return file:match('([^/]+)/macaddress$')
-    end
-  end
+	local addr = macaddr:lower()
+	for file in fs.glob('/sys/class/ieee80211/*/macaddress') do
+		if lutil.trim(fs.readfile(file)) == addr then
+			return file:match('([^/]+)/macaddress$')
+		end
+	end
 end
 
 local function find_phy(radio)
-  local config = uci:get_all('wireless', radio)
+	local config = uci:get_all('wireless', radio)
 
-  if not config or config.type ~= 'mac80211' then
-    return nil
-  elseif config.path then
-    return find_phy_by_path(config.path)
-  elseif config.macaddr then
-    return find_phy_by_macaddr(config.macaddr)
-  else
-    return nil
-  end
+	if not config or config.type ~= 'mac80211' then
+		return nil
+	elseif config.path then
+		return find_phy_by_path(config.path)
+	elseif config.macaddr then
+		return find_phy_by_macaddr(config.macaddr)
+	else
+		return nil
+	end
 end
 
 local function get_addresses(radio)
-  local phy = find_phy(radio)
-  if not phy then
-    return function() end
-  end
+	local phy = find_phy(radio)
+	if not phy then
+		return function() end
+	end
 
-  return io.lines('/sys/class/ieee80211/' .. phy .. '/addresses')
+	return io.lines('/sys/class/ieee80211/' .. phy .. '/addresses')
 end
 
 -- Generates a (hopefully) unique MAC address
@@ -126,70 +125,70 @@ end
 -- 6: ibss1
 -- 7: wan_radio1 (private WLAN); mesh VPN
 function generate_mac(i)
-  if i > 7 or i < 0 then return nil end -- max allowed id (0b111)
+	if i > 7 or i < 0 then return nil end -- max allowed id (0b111)
 
-  local hashed = string.sub(hash.md5(sysconfig.primary_mac), 0, 12)
-  local m1, m2, m3, m4, m5, m6 = string.match(hashed, '(%x%x)(%x%x)(%x%x)(%x%x)(%x%x)(%x%x)')
+	local hashed = string.sub(hash.md5(sysconfig.primary_mac), 0, 12)
+	local m1, m2, m3, m4, m5, m6 = string.match(hashed, '(%x%x)(%x%x)(%x%x)(%x%x)(%x%x)(%x%x)')
 
-  m1 = tonumber(m1, 16)
-  m6 = tonumber(m6, 16)
+	m1 = tonumber(m1, 16)
+	m6 = tonumber(m6, 16)
 
-  m1 = nixio.bit.bor(m1, 0x02)  -- set locally administered bit
-  m1 = nixio.bit.band(m1, 0xFE) -- unset the multicast bit
+	m1 = nixio.bit.bor(m1, 0x02)  -- set locally administered bit
+	m1 = nixio.bit.band(m1, 0xFE) -- unset the multicast bit
 
-  -- It's necessary that the first 45 bits of the MAC address don't
-  -- vary on a single hardware interface, since some chips are using
-  -- a hardware MAC filter. (e.g 'rt305x')
+	-- It's necessary that the first 45 bits of the MAC address don't
+	-- vary on a single hardware interface, since some chips are using
+	-- a hardware MAC filter. (e.g 'rt305x')
 
-  m6 = nixio.bit.band(m6, 0xF8) -- zero the last three bits (space needed for counting)
-  m6 = m6 + i                   -- add virtual interface id
+	m6 = nixio.bit.band(m6, 0xF8) -- zero the last three bits (space needed for counting)
+	m6 = m6 + i                   -- add virtual interface id
 
-  return string.format('%02x:%s:%s:%s:%s:%02x', m1, m2, m3, m4, m5, m6)
+	return string.format('%02x:%s:%s:%s:%s:%02x', m1, m2, m3, m4, m5, m6)
 end
 
 local function get_wlan_mac_from_driver(radio, vif)
-  local primary = sysconfig.primary_mac:lower()
+	local primary = sysconfig.primary_mac:lower()
 
-  local i = 1
-  for addr in get_addresses(radio) do
-    if addr:lower() ~= primary then
-      if i == vif then
-        return addr
-      end
+	local i = 1
+	for addr in get_addresses(radio) do
+		if addr:lower() ~= primary then
+			if i == vif then
+				return addr
+			end
 
-      i = i + 1
-    end
-  end
+			i = i + 1
+		end
+	end
 end
 
 function get_wlan_mac(radio, index, vif)
-  local addr = get_wlan_mac_from_driver(radio, vif)
-  if addr then
-    return addr
-  end
+	local addr = get_wlan_mac_from_driver(radio, vif)
+	if addr then
+		return addr
+	end
 
-  return generate_mac(4*(index-1) + (vif-1))
+	return generate_mac(4*(index-1) + (vif-1))
 end
 
 -- Iterate over all radios defined in UCI calling
 -- f(radio, index, site.wifiX) for each radio found while passing
 --  site.wifi24 for 2.4 GHz devices and site.wifi5 for 5 GHz ones.
 function iterate_radios(f)
-  local radios = {}
-
-  uci:foreach('wireless', 'wifi-device',
-    function(s)
-      table.insert(radios, s['.name'])
-    end
-  )
-
-  for index, radio in ipairs(radios) do
-    local hwmode = uci:get('wireless', radio, 'hwmode')
-
-    if hwmode == '11g' or hwmode == '11ng' then
-      f(radio, index, site.wifi24)
-    elseif hwmode == '11a' or hwmode == '11na' then
-      f(radio, index, site.wifi5)
-    end
-  end
+	local radios = {}
+
+	uci:foreach('wireless', 'wifi-device',
+	function(s)
+		table.insert(radios, s['.name'])
+	end
+	)
+
+	for index, radio in ipairs(radios) do
+		local hwmode = uci:get('wireless', radio, 'hwmode')
+
+		if hwmode == '11g' or hwmode == '11ng' then
+			f(radio, index, site.wifi24)
+		elseif hwmode == '11a' or hwmode == '11na' then
+			f(radio, index, site.wifi5)
+		end
+	end
 end