Robert Alm 3638a83657 Add error-check when mapping socket to fd
The call to fdopen can fail in several ways.
The fprintf on the next line will then dereference a
NULL-pointer FILE*.
Added a NULL-check, closed the socket, returned system error
and added a comment about it.

Change-Id: I7a6b26aa3c79452b1fdd76af12dfa75da88cbad7
2014-11-27 11:01:50 -08:00
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