[Libguestfs] [PATCH] Daemon: fix handling of errors from xread.

[Daniel P. Berrange]

On Thu, Sep 17, 2009 at 03:33:24PM +0100, Richard W.M. Jones wrote:
> 
> This caused me to waste about 3 hours looking for a non-existent "data
> corrupter" bug, which turned out to be the result of not checking the
> return value of xread ...

You might want to add 

 __attribute__((__warn_unused_result__))

to the header file decl of xread/xwrite so that the compiler will
warn if any other code areas forget to check the return error code

Daniel
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