K 10
svn:author
V 2
ed
K 8
svn:date
V 27
2008-05-28T20:25:19.000000Z
K 7
svn:log
V 586
Remove redundant checks from fcntl()'s F_DUPFD.

Right now we perform some of the checks inside the fcntl()'s F_DUPFD
operation twice. We first validate the `fd' argument. When finished,
we validate the `arg' argument. These checks are also performed inside
do_dup().

The reason we need to do this, is because fcntl() should return different
errno's when the `arg' argument is out of bounds (EINVAL instead of
EBADF). To prevent the redundant locking of the PROC_LOCK and
FILEDESC_SLOCK, patch do_dup() to support the error semantics required
by fcntl().

Approved by:	philip (mentor)

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