6a4bb303e9a6657fa04bce98355afadbaf757c7e
[hcoop/domtool2.git] / src / plugins / firewall.sml
1 (* HCoop Domtool (http://hcoop.sourceforge.net/)
2 * Copyright (c) 2006-2007, Adam Chlipala
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 *)
18
19 (* Firewall rule querying *)
20
21 structure Firewall :> FIREWALL = struct
22
23 fun query uname =
24 let
25 val inf = TextIO.openIn "/etc/firewall/users.rules"
26
27 fun loop rules =
28 case TextIO.inputLine inf of
29 NONE => List.rev rules
30 | SOME line =>
31 if String.sub (line, 0) = #"#" then
32 loop rules
33 else case String.tokens Char.isSpace line of
34 uname'::rest =>
35 if uname = uname' then
36 loop (String.concatWith " " rest :: rules)
37 else
38 loop rules
39 | _ => loop rules
40 in
41 loop []
42 before TextIO.closeIn inf
43 end handle IO.Io _ => []
44
45
46 end