propellor/src/Propellor/Property/Hostname.hs

34 lines
1.0 KiB
Haskell
Raw Normal View History

2014-03-31 03:37:54 +00:00
module Propellor.Property.Hostname where
2014-03-30 03:45:48 +00:00
2014-03-31 03:55:59 +00:00
import Propellor
2014-03-31 03:37:54 +00:00
import qualified Propellor.Property.File as File
2014-03-30 03:45:48 +00:00
2014-04-10 21:46:03 +00:00
-- | Ensures that the hostname is set to the HostAttr value.
2014-04-14 19:17:31 +00:00
-- Configures /etc/hostname and the current hostname.
2014-04-04 03:57:36 +00:00
--
2014-04-14 19:17:31 +00:00
-- 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).
2014-04-10 21:46:03 +00:00
sane :: Property
sane = property ("sane hostname") (ensureProperty . setTo =<< getHostName)
2014-04-10 21:46:03 +00:00
setTo :: HostName -> Property
2014-04-11 01:09:20 +00:00
setTo hn = combineProperties desc go
`onChange` cmdProperty "hostname" [basehost]
2014-04-04 03:35:36 +00:00
where
2014-04-11 01:09:20 +00:00
desc = "hostname " ++ hn
(basehost, domain) = separate (== '.') hn
2014-04-04 03:57:36 +00:00
go = catMaybes
2014-04-11 01:09:20 +00:00
[ Just $ "/etc/hostname" `File.hasContent` [basehost]
2014-04-04 03:57:36 +00:00
, if null domain
then Nothing
else Just $ File.fileProperty desc
addhostline "/etc/hosts"
]
hostip = "127.0.1.1"
2014-04-11 01:09:20 +00:00
hostline = hostip ++ "\t" ++ hn ++ " " ++ basehost
2014-04-04 03:57:36 +00:00
addhostline ls = hostline : filter (not . hashostip) ls
hashostip l = headMaybe (words l) == Just hostip