2 FFLuCI - Utility library
5 Several common useful Lua functions
11 Copyright 2008 Steven Barth <steven@midlink.org>
13 Licensed under the Apache License, Version 2.0 (the "License");
14 you may not use this file except in compliance with the License.
15 You may obtain a copy of the License at
17 http://www.apache.org/licenses/LICENSE-2.0
19 Unless required by applicable law or agreed to in writing, software
20 distributed under the License is distributed on an "AS IS" BASIS,
21 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
22 See the License for the specific language governing permissions and
23 limitations under the License.
27 module("ffluci.util", package.seeall)
29 -- Checks whether a table has an object "value" in it
30 function contains(table, value)
31 for k,v in pairs(table) do
40 -- Dumps a table to stdout (useful for testing and debugging)
41 function dumptable(t, i)
43 for k,v in pairs(t) do
44 print(string.rep("\t", i) .. k, v)
45 if type(v) == "table" then
52 -- Escapes all occurences of c in s
55 return s:gsub(c, "\\" .. c)
59 -- Runs "command" and returns its output
60 function exec(command, return_array)
61 local pp = io.popen(command)
70 if (line == nil) then break end
71 table.insert(data, line)
82 -- Populate obj in the scope of f as key
83 function extfenv(f, key, obj)
84 local scope = getfenv(f)
90 -- Updates the scope of f with "extscope"
91 function updfenv(f, extscope)
92 local scope = getfenv(f)
93 for k, v in pairs(extscope) do
99 -- Returns the filename of the calling script
101 return debug.getinfo(2, 'S').source:sub(2)