Add ETA output control and interactivity check
authorAaron Carroll <aaronc@cse.unsw.edu.au>
Fri, 14 Sep 2007 07:49:41 +0000 (09:49 +0200)
committerJens Axboe <jens.axboe@oracle.com>
Fri, 14 Sep 2007 07:49:41 +0000 (09:49 +0200)
 - Real-time ETA display is only printed if output is to a terminal.

 - Accordingly, add --eta=always|never|auto option.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

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