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--[[
UCI Validation Layer - Validation helper
(c) 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
(c) 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
$Id$
]]--
local os = require "os"
local fs = require "nixio.fs"
local sys = require "luci.sys"
local ERR = require "luci.uvl.errors".error
local ipairs, unpack, type, tostring = ipairs, unpack, type, tostring
module "luci.uvl.validation"
function _exec( bin, args )
local cmd, output = "", nil
for _, v in ipairs({ bin, unpack(args) }) do
cmd = cmd .. ("%q " % v):gsub("([%$`])","\\%1")
end
local tmpfile = "/tmp/uvl" .. sys.uniqueid(8)
local retval = os.execute( cmd .. " 1>" .. tmpfile .. " 2>" .. tmpfile )
if fs.access(tmpfile) then
output = fs.readfile(tmpfile)
fs.unlink(tmpfile)
end
return retval, output
end
function check( self, object )
if object:scheme('validators') then
for _, val in ipairs(object:scheme('validators')) do
local ok, err = false, nil
local values = object:value()
values = type(values) == "table" and values or { values }
local args = {
object:scheme('type'), object:scheme('datatype'),
object.cref[1], object.cref[2], object.cref[3] or '',
unpack(values)
}
if type(val) == "function" then
ok, err = val(unpack(args))
else
ok, err = _exec( val, args )
ok = ( ok == 0 )
end
if not ok then
return false, ERR('SME_ERRVAL', object, {tostring(val), err})
end
end
end
return true, nil
end
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