Fix dumb message name; allow numbers and underscores in database names
[hcoop/domtool2.git] / src / plugins / apt.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 (* APT package database querying *)
20
21 structure Apt :> APT = struct
22
23 fun validName s = CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"_" orelse ch = #"-" orelse ch = #".") s
24 andalso (size s > 0 andalso String.sub (s, 0) <> #"-")
25
26 fun installed name =
27 validName name
28 andalso OS.Process.isSuccess (OS.Process.system ("/usr/bin/dpkg -p " ^ name ^ " >/dev/null 2>/dev/null"))
29
30 end