only add apache to trusted-users file if its not already in there

diff --git a/plc.d/mail b/plc.d/mail
index fba0973..01441b7 100755 (executable)
--- a/plc.d/mail
+++ b/plc.d/mail
@@ -28,7 +28,10 @@ case "$1" in
 
        # Add apache to list of users that can send mail as others
        # without a warning, so that the API can send out mail.
-       echo "apache" >/etc/mail/trusted-users
+       count=$(grep ^apache /etc/mail/trusted-users|wc -l)
+       if [ $count -eq 0 ] ; then
+               echo "apache" >>/etc/mail/trusted-users
+       fi
 
        (exec 3>&- 4>&- ; service sendmail start)
        check