checking close's return value

[News reading a/c for rb]

>From article <1988Sep20.230150.7574 at utzoo.uucp>, by henry at utzoo.uucp (Henry Spencer):
> It's not at all inconceivable for devices that use the buffer
> cache to report an error in asynchronous I/O by returning an
> error from close().

NFS is a case in point - there all sorts of cases where
close() can fail after other operations have succeeded.