32 lines
926 B
Haskell
32 lines
926 B
Haskell
module Propellor.Property.Hostname where
|
||
|
||
import Propellor
|
||
import qualified Propellor.Property.File as File
|
||
|
||
-- | Sets the hostname. Configures both /etc/hostname and the current
|
||
-- hostname.
|
||
--
|
||
-- When provided with a FQDN, also configures /etc/hosts,
|
||
-- with an entry for 127.0.1.1, which is standard at least on Debian
|
||
-- to set the FDQN (127.0.0.1 is localhost).
|
||
set :: HostName -> Property
|
||
set hostname = combineProperties desc go
|
||
`onChange` cmdProperty "hostname" [host]
|
||
where
|
||
desc = "hostname " ++ hostname
|
||
(host, domain) = separate (== '.') hostname
|
||
|
||
go = catMaybes
|
||
[ Just $ "/etc/hostname" `File.hasContent` [host]
|
||
, if null domain
|
||
then Nothing
|
||
else Just $ File.fileProperty desc
|
||
addhostline "/etc/hosts"
|
||
]
|
||
|
||
hostip = "127.0.1.1"
|
||
hostline = hostip ++ "\t" ++ hostname ++ " " ++ host
|
||
|
||
addhostline ls = hostline : filter (not . hashostip) ls
|
||
hashostip l = headMaybe (words l) == Just hostip
|