jh 929aea7f32 - Handle short reads when the -P option is used. Short reads must be
handled when reading from pipes.
- Remove dead code related to the -P option from getvol(). pipein and
  pipecmdin are never set at the same time.

PR:		bin/121502
Approved by:	trasz (mentor)
MFC after:	2 weeks
2010-01-29 10:04:00 +00:00
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