Firewall rule look-up

[hcoop/domtool2.git] / src / slave.sml

diff --git a/src/slave.sml b/src/slave.sml
index 719b417..af8b606 100644 (file)
--- a/src/slave.sml
+++ b/src/slave.sml
@@ -181,4 +181,23 @@ fun writeList (fname, ls) =
        TextIO.closeOut outf
     end
 
+fun lineInFile fname line =
+    let
+       val inf = TextIO.openIn fname
+       val line' = line ^ "\n"
+
+       fun loop () =
+           case TextIO.inputLine inf of
+               NONE => false
+             | SOME line => line = line' orelse loop ()
+    in
+       loop ()
+       before TextIO.closeIn inf
+    end handle IO.Io _ => false
+
+fun inGroup {user, group} =
+    List.exists (fn x => x = user)
+               (Posix.SysDB.Group.members (Posix.SysDB.getgrnam group))
+               handle OS.SysErr _ => false
+
 end