Alan Cox cde9bc877b Changed vn_read/write such that fp->f_offset isn't touched
if uio->uio_offset != -1.  This fixes a problem with aio_read/write
and permits a straightforward implementation of pread/pwrite.

PR:		kern/8669
Submitted by:	John Plevyak <jplevyak@inktomi.com>
Reviewed by:	Matthew Dillon <dillon@apollo.backplane.com>
1999-03-26 20:25:21 +00:00
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