Index: /trunk/packages/sipb-xen-www/code/cache_acls.py
===================================================================
--- /trunk/packages/sipb-xen-www/code/cache_acls.py	(revision 412)
+++ /trunk/packages/sipb-xen-www/code/cache_acls.py	(revision 413)
@@ -29,5 +29,8 @@
             return [name]
         name = 'system:'+name
-    return getafsgroups.getAfsGroupMembers(name, 'athena.mit.edu')
+    try:
+        return getafsgroups.getAfsGroupMembers(name, 'athena.mit.edu')
+    except getafsgroups.AfsProcessError:
+        return []
 
 def accessList(m):
Index: /trunk/packages/sipb-xen-www/code/getafsgroups.py
===================================================================
--- /trunk/packages/sipb-xen-www/code/getafsgroups.py	(revision 412)
+++ /trunk/packages/sipb-xen-www/code/getafsgroups.py	(revision 413)
@@ -29,8 +29,9 @@
 
 def getAfsGroupMembers(group, cell):
-    p = subprocess.Popen(["pts", "membership", group, '-c', cell], 
+    p = subprocess.Popen(["pts", "membership", "-noauth", group, '-c', cell], 
                          stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-    if p.wait():
-        return []
+    err = p.stderr.read()
+    if err: #Error code doesn't reveal missing groups, but stderr does
+        raise AfsProcessError(err)
     return [line.strip() for line in p.stdout.readlines()[1:]]
 
@@ -39,10 +40,4 @@
         raise AfsProcessError("Locker '%s' is invalid." % locker)
     return '/mit/' + locker
-
-def checkAfsGroup(user, group, cell):
-    """
-    checkAfsGroup(user, group) returns True if and only if user is in AFS group group in cell cell
-    """
-    return user in getAfsGroupMembers(group, cell)
 
 def getCell(locker):
@@ -82,6 +77,6 @@
 
     for entry in values:
-        if entry == user or (entry[0:6] == "system" and 
-                                checkAfsGroup(user, entry, cell)):
+        if entry == user or (entry[0:6] == "system" and
+                                user in getAfsGroupMembers(entry, cell)):
             return False
     return "You don't have admin bits on " + getLockerPath(locker)
@@ -90,8 +85,8 @@
 if __name__ == "__main__":
 #    print list(getldapgroups("tabbott"))
-    print checkAfsGroup("tabbott", "system:debathena", 'athena.mit.edu')
-    print checkAfsGroup("tabbott", "system:debathena", 'sipb.mit.edu')
-    print checkAfsGroup("tabbott", "system:debathena-root", 'athena.mit.edu')
-    print checkAfsGroup("tabbott", "system:hmmt-request", 'athena.mit.edu')
+    print "tabbott" in getAfsGroupMembers("system:debathena", 'athena.mit.edu')
+    print "tabbott" in getAfsGroupMembers("system:debathena", 'sipb.mit.edu')
+    print "tabbott" in getAfsGroupMembers("system:debathena-root", 'athena.mit.edu')
+    print "tabbott" in getAfsGroupMembers("system:hmmt-request", 'athena.mit.edu')
     print notLockerOwner("tabbott", "tabbott")
     print notLockerOwner("tabbott", "debathena")
Index: /trunk/packages/sipb-xen-www/code/validation.py
===================================================================
--- /trunk/packages/sipb-xen-www/code/validation.py	(revision 412)
+++ /trunk/packages/sipb-xen-www/code/validation.py	(revision 413)
@@ -159,7 +159,10 @@
             return admin
         admin = 'system:' + admin
-    if getafsgroups.checkAfsGroup(user, admin, 'athena.mit.edu'):
-        return admin
-    #XXX Should we require that user is in cache_acls.expandName(admin)?
+    try:
+        if user in getafsgroups.getAfsGroupMembers(admin, 'athena.mit.edu'):
+            return admin
+    except getafsgroups.AfsProcessError, e:
+        raise InvalidInput('administrator', admin, str(e))
+    #XXX Should we require that user is in the admin group?
     return admin