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--[[
FFLuCI - Filesystem tools
Description:
A module offering often needed filesystem manipulation functions
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.fs", package.seeall)
require("lfs")
-- Checks whether a file exists
function isfile(filename)
local fp = io.open(path, "r")
if file then file:close() end
return file ~= nil
end
-- Returns the content of file
function readfile(filename)
local fp = io.open(filename)
if fp == nil then
error("Unable to open file for reading: " .. filename)
end
local data = fp:read("*a")
fp:close()
return data
end
-- Returns the content of file as array of lines
function readfilel(filename)
local fp = io.open(filename)
local line = ""
local data = {}
if fp == nil then
error("Unable to open file for reading: " .. filename)
end
while true do
line = fp:read()
if (line == nil) then break end
table.insert(data, line)
end
fp:close()
return data
end
-- Writes given data to a file
function writefile(filename, data)
local fp = io.open(filename, "w")
if fp == nil then
error("Unable to open file for writing: " .. filename)
end
fp:write(data)
fp:close()
end
-- Returns the file modification date/time of "path"
function mtime(path)
return lfs.attributes(path, "modification")
end
-- Simplified dirname function
function dirname(file)
return string.gsub(file, "[^/]+$", "")
end
-- Diriterator - alias for lfs.dir - filter . and ..
function dir(path)
local e = {}
for entry in lfs.dir(path) do
if not(entry == "." or entry == "..") then
table.insert(e, entry)
end
end
return e
end
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