On Fri, Aug 09, 2002 at 01:48:47PM -0700, Andrew Morton wrote:
> What should the behaviour be? The lseek should succeed,
Yes
> but subsequent reads and writes return zero?
Yes. The first read must return 0. Subsequent reads may return 0
or return the ENXIO error.
For read: "No data transfer shall occur past the current end-of-file.
If the starting position is at or after the end-of-file, 0 shall be
returned. If the file refers to a device special file, the result of
subsequent read() requests is implementation-defined."
ENXIO: "the request was outside the capabilities of the device".
For write: "If a write() requests that more bytes be written than
there is room for (for example, ... the physical end of a medium),
only as many bytes as there is room for shall be written.
Andries
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