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|
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Prompt.Ssh
-- Copyright : (C) 2007 Andrea Rossato
-- License : BSD3
--
-- Maintainer : andrea.rossato@unibz.it
-- Stability : unstable
-- Portability : unportable
--
-- A ssh prompt for XMonad
--
-----------------------------------------------------------------------------
module XMonad.Prompt.Ssh(
-- * Usage
-- $usage
sshPrompt
) where
import XMonad
import XMonad.Util.Run
import XMonad.Prompt
import System.Directory
import System.Environment
import Control.Monad
import Data.List
import Data.Maybe
-- $usage
-- 1. In your @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Prompt
-- > import XMonad.Prompt.Ssh
--
-- 2. In your keybindings add something like:
--
-- > , ((modMask x .|. controlMask, xK_s), sshPrompt defaultXPConfig)
--
-- Keep in mind, that if you want to use the completion you have to
-- disable the "HashKnownHosts" option in your ssh_config
--
-- For detailed instruction on editing the key binding see
-- "XMonad.Doc.Extending#Editing_key_bindings".
data Ssh = Ssh
instance XPrompt Ssh where
showXPrompt Ssh = "SSH to: "
sshPrompt :: XPConfig -> X ()
sshPrompt c = do
sc <- io $ sshComplList
mkXPrompt Ssh c (mkComplFunFromList sc) ssh
ssh :: String -> X ()
ssh s = runInTerm "" ("ssh " ++ s)
sshComplList :: IO [String]
sshComplList = uniqSort `fmap` liftM2 (++) sshComplListLocal sshComplListGlobal
sshComplListLocal :: IO [String]
sshComplListLocal = do
h <- getEnv "HOME"
sshComplListFile $ h ++ "/.ssh/known_hosts"
sshComplListGlobal :: IO [String]
sshComplListGlobal = do
env <- getEnv "SSH_KNOWN_HOSTS" `catch` (\_ -> return "/nonexistent")
fs <- mapM fileExists [ env
, "/usr/local/etc/ssh/ssh_known_hosts"
, "/usr/local/etc/ssh_known_hosts"
, "/etc/ssh/ssh_known_hosts"
, "/etc/ssh_known_hosts"
]
case catMaybes fs of
[] -> return []
(f:_) -> sshComplListFile' f
sshComplListFile :: String -> IO [String]
sshComplListFile kh = do
f <- doesFileExist kh
if f then sshComplListFile' kh
else return []
sshComplListFile' :: String -> IO [String]
sshComplListFile' kh = do
l <- readFile kh
return $ map (takeWhile (/= ',') . concat . take 1 . words)
$ filter nonComment
$ lines l
fileExists :: String -> IO (Maybe String)
fileExists kh = do
f <- doesFileExist kh
if f then return $ Just kh
else return Nothing
nonComment :: String -> Bool
nonComment [] = False
nonComment ('#':_) = False
nonComment ('|':_) = False -- hashed, undecodeable
nonComment _ = True
|
