Listing vmail mailboxes

[clinton/domtool2.git] / src / mail / vmail.sml

diff --git a/src/mail/vmail.sml b/src/mail/vmail.sml
index a1f8648..f5010eb 100644 (file)
--- a/src/mail/vmail.sml
+++ b/src/mail/vmail.sml
@@ -22,6 +22,31 @@ structure Vmail :> VMAIL = struct
 
 fun rebuild () = Slave.shell [Config.Courier.postReload]
 
+datatype listing =
+        Error of string
+       | Listing of string list
+
+fun list domain =
+    let
+       val inf = TextIO.openIn (OS.Path.joinDirFile {dir = Config.Courier.userdbDir,
+                                                     file = domain})
+
+       fun loop users =
+           case TextIO.inputLine inf of
+               NONE => Listing (rev users)
+             | SOME line =>
+               case String.tokens Char.isSpace line of
+                   [addr, _] =>
+                   (case String.fields (fn ch => ch = #"@") addr of
+                        [user, _] => loop (user :: users)
+                      | _ => Error "Invalid e-mail address format in database")
+                 | _ => Error "Invalid entry in database"
+    in
+       loop []
+       before TextIO.closeIn inf
+    end
+       handle IO.Io _ => Listing []
+
 fun add {domain, requester, user, passwd, mailbox} =
     let
        val udb = Posix.SysDB.getpwnam requester