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--[[
nixio - Linux I/O library for lua
Copyright 2009 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
$Id$
]]--
local table = require "table"
local nixio = require "nixio"
local type, ipairs, setmetatable = type, ipairs, setmetatable
require "nixio.util"
module ("nixio.fs", function(m) setmetatable(m, {__index = nixio.fs}) end)
function readfile(path, limit)
local fd, code, msg = nixio.open(path, "r")
local data
if not fd then
return nil, code, msg
end
data, code, msg = fd:readall(limit)
fd:close()
return data, code, msg
end
function writefile(path, data)
local fd, code, msg, stat = nixio.open(path, "w")
if not fd then
return nil, code, msg
end
stat, code, msg = fd:writeall(data)
fd:close()
return stat, code, msg
end
function datacopy(src, dest, size)
local fdin, code, msg = nixio.open(src, "r")
if not fdin then
return nil, code, msg
end
local fdout, code, msg = nixio.open(dest, "w")
if not fdout then
return nil, code, msg
end
local stat, code, msg, sent = fdin:copy(fdout, size)
fdin:close()
fdout:close()
return stat, code, msg, sent
end
function copy(src, dest)
local stat, code, msg, res = nixio.fs.lstat(src)
if not stat then
return nil, code, msg
end
if stat.type == "dir" then
if nixio.fs.stat(dest, type) ~= "dir" then
res, code, msg = nixio.fs.mkdir(dest)
else
stat = true
end
elseif stat.type == "lnk" then
res, code, msg = nixio.fs.symlink(nixio.fs.readlink(src), dest)
elseif stat.type == "reg" then
res, code, msg = datacopy(src, dest)
end
if not res then
return nil, code, msg
end
nixio.fs.utimes(dest, stat.atime, stat.mtime)
if nixio.fs.lchown then
nixio.fs.lchown(dest, stat.uid, stat.gid)
end
if stat.type ~= "lnk" then
nixio.fs.chmod(dest, stat.modedec)
end
return true
end
function move(src, dest)
local stat, code, msg = nixio.fs.rename(src, dest)
if not stat and code == nixio.const.EXDEV then
stat, code, msg = copy(src, dest)
if stat then
stat, code, msg = nixio.fs.unlink(src)
end
end
return stat, code, msg
end
function mkdirr(dest, mode)
if nixio.fs.stat(dest, "type") == "dir" then
return true
else
local stat, code, msg = nixio.fs.mkdir(dest, mode)
if not stat and code == nixio.const.ENOENT then
stat, code, msg = mkdirr(nixio.fs.dirname(dest), mode)
if stat then
stat, code, msg = nixio.fs.mkdir(dest, mode)
end
end
return stat, code, msg
end
end
local function _recurse(cb, src, dest)
local type = nixio.fs.lstat(src, "type")
if type ~= "dir" then
return cb(src, dest)
else
local stat, se, code, msg, s, c, m = true, nixio.const.sep
if dest then
s, c, m = cb(src, dest)
stat, code, msg = stat and s, c or code, m or msg
end
for e in nixio.fs.dir(src) do
if dest then
s, c, m = _recurse(cb, src .. se .. e, dest .. se .. e)
else
s, c, m = _recurse(cb, src .. se .. e)
end
stat, code, msg = stat and s, c or code, m or msg
end
if not dest then -- Postfix
s, c, m = cb(src)
stat, code, msg = stat and s, c or code, m or msg
end
return stat, code, msg
end
end
function copyr(src, dest)
return _recurse(copy, src, dest)
end
function mover(src, dest)
local stat, code, msg = nixio.fs.rename(src, dest)
if not stat and code == nixio.const.EXDEV then
stat, code, msg = _recurse(copy, src, dest)
if stat then
stat, code, msg = _recurse(nixio.fs.remove, src)
end
end
return stat, code, msg
end
function remover(src)
return _recurse(nixio.fs.remove, src)
end
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