From d96f3c99ec34e73e48ffef5fdb8d3dc071d134e2 Mon Sep 17 00:00:00 2001
From: rupa <rupa@lrrr.us>
Date: Thu, 14 Apr 2011 08:28:08 -0400
Subject: [PATCH] bail out if we're another user but our env is still from
 olduser - prevent clobbering our db file

---
 z.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/z.sh b/z.sh
index ce50d50..75eaaf9 100755
--- a/z.sh
+++ b/z.sh
@@ -24,6 +24,9 @@ z() {
 
  local datafile="$HOME/.z"
 
+ # bail out if we don't own ~/.z (we're another user but our ENV is still set)
+ [ "$(ls -l "$datafile" | cut -d' ' -f 3)" = "$USER" ] || return
+
  # add entries
  if [ "$1" = "--add" ]; then
   shift