1 files changed, 14 insertions, 0 deletions
diff --git a/src/Propellor/Property/Group.hs b/src/Propellor/Property/Group.hs
new file mode 100644
index 00000000..f03510cf
--- /dev/null
+++ b/src/Propellor/Property/Group.hs
@@ -0,0 +1,14 @@
+module Propellor.Property.Group where
+
+import Propellor
+
+type GID = Int
+
+exists :: GroupName -> Maybe GID -> Property
+exists group' mgid = check test (cmdProperty "addgroup" $ args mgid)
+	`describe` unwords ["group", group']
+  where
+	groupFile = "/etc/group"
+	test = not <$> elem group' <$> words <$> readProcess "cut" ["-d:", "-f1", groupFile]
+	args Nothing = [group']
+	args (Just gid) = ["--gid", show gid, group']