[PATCH] blackbox: defer opening a log file until needed (issue3869)

[Durham Goode]

On 3/26/13 4:28 PM, "Bryan O'Sullivan" <bos at serpentine.com> wrote:

># HG changeset patch
># User Bryan O'Sullivan <bryano at fb.com>
># Date 1364340471 25200
>#      Tue Mar 26 16:27:51 2013 -0700
># Node ID b399b3dfd25471dfb99856419e90d49961c85c58
># Parent  b2a36e9b9ccc9b6187efa93970eac7547aeb9632
>blackbox: defer opening a log file until needed (issue3869)
>

LGTM.  Should we close the file after every write as well so we don't
encounter any other cases where NFS can't delete the tree while it's open?