ACLs

[hcoop/domtool2.git] / src / acl.sig

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+(* HCoop Domtool (http://hcoop.sourceforge.net/)
+ * Copyright (c) 2006, Adam Chlipala
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *)
+
+(* Per-user access control lists for resources various *)
+
+signature ACL = sig
+
+    type acl = {user : string,  (* The UNIX user being granted a permission *)
+               class : string, (* The type of permission granted *)
+               value : string} (* The object for which it is granted *)
+
+    val query : acl -> bool
+    (* Is this permission granted? *)
+
+    val class : {user : string, class : string} -> DataStructures.StringSet.set
+    (* For what objects does the user have the permission? *)
+
+    val grant : acl -> unit
+    val revoke : acl -> unit
+    (* Grant/ungrant the user the permission. *)
+
+    val read : string -> unit
+    val write : string -> unit
+    (* Read/write saved ACL state from/to a file *)
+
+end