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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("posix")
-- Glob
glob = posix.glob
-- Checks whether a file exists
function isfile(filename)
local fp = io.open(filename, "r")
if fp then fp:close() end
return fp ~= nil
end
-- Returns the content of file
function readfile(filename)
local fp, err = io.open(filename)
if fp == nil then
return nil, err
end
local data = fp:read("*a")
fp:close()
return data
end
-- Writes given data to a file
function writefile(filename, data)
local fp, err = io.open(filename, "w")
if fp == nil then
return nil, err
end
fp:write(data)
fp:close()
return true
end
-- Returns the file modification date/time of "path"
function mtime(path)
return posix.stat(path, "mtime")
end
-- basename wrapper
basename = posix.basename
-- dirname wrapper
dirname = posix.dirname
-- dir wrapper
dir = posix.dir
-- wrapper for posix.mkdir
function mkdir(path, recursive)
if recursive then
local base = "."
if path:sub(1,1) == "/" then
base = ""
path = path:gsub("^/+","")
end
for elem in path:gmatch("([^/]+)/*") do
base = base .. "/" .. elem
local stat = posix.stat( base )
if not stat then
local stat, errmsg, errno = posix.mkdir( base )
if type(stat) ~= "number" or stat ~= 0 then
return stat, errmsg, errno
end
else
if stat.type ~= "directory" then
return nil, base .. ": File exists", 17
end
end
end
return 0
else
return posix.mkdir( path )
end
end
-- Alias for posix.rmdir
rmdir = posix.rmdir
-- Alias for posix.stat
stat = posix.stat
-- Alias for posix.chmod
chmod = posix.chmod
-- Alias for posix.link
link = posix.link
-- Alias for posix.unlink
unlink = posix.unlink
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