blob: 6b8dcbd47f3475659fd07ecf3026b3926b03eb02 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
-----------------------------------------------------------------------------
-- |
-- Module : Xmobar.Commands
-- Copyright : (c) Andrea Rossato
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it>
-- Stability : unstable
-- Portability : unportable
--
-- The 'Exec' class and the 'Command' data type.
--
-- The 'Exec' class rappresents the executable types, whose constructors may
-- appear in the 'Config.commands' field of the 'Config.Config' data type.
--
-- The 'Command' data type is for OS commands to be run by Xmobar
--
-----------------------------------------------------------------------------
module Commands where
import System.Process
import System.Exit
import System.IO (hClose, hGetLine)
class Exec e where
run :: e -> IO String
rate :: e -> Int
alias :: e -> String
data Command = Com Program Args Alias Rate
deriving (Show,Read,Eq)
type Args = [String]
type Program = String
type Alias = String
type Rate = Int
instance Exec Command where
alias (Com p _ a _) | p /= "" = if a == "" then p else a
| otherwise = ""
rate (Com _ _ _ r) = r
run (Com prog args _ _) = do
(i,o,e,p) <- runInteractiveCommand (prog ++ concat (map (' ':) args))
exit <- waitForProcess p
let closeHandles = do
hClose o
hClose i
hClose e
case exit of
ExitSuccess -> do
str <- hGetLine o
closeHandles
return str
_ -> do closeHandles
return $ "Could not execute command " ++ prog
|
