Xin LI c38fa7e016 Check return value of dup(), it could be -1 when the system is running
out of file descriptors for instance.

Found with:	Coverity Prevent(tm)
CID:		6084
MFC after:	1 month
2010-08-19 01:34:00 +00:00
..
2009-06-24 21:51:02 +00:00