--- readdir-mountpoint-inode	2011-01-29 20:59:20.000000000 +0100
+++ readdir-mountpoint-inode.fixed	2011-01-29 20:58:58.000000000 +0100
@@ -55,7 +55,9 @@
   esac
   opts=$(ls_ignore_options "$base")
   parent_dir=$(dirname $mount_point)
-  eval "ls -i $opts $parent_dir" | sed 's/ .*//'
+  ls_out=$(eval "ls -i $opts $parent_dir")
+  test $? -eq 0 || return 77
+  echo $ls_out | sed 's/ .*//'
 }
 
 for dir in $mount_points; do