Re: [PATCH] mkswap: when writing the signature page, handle EINTR returns.

[LaMont Jones <lamont@xxxxxxxxxxxx>]

On Wed, Apr 16, 2008 at 12:46:32AM +0200, Karel Zak wrote:
> On Tue, Apr 15, 2008 at 12:34:08PM +0100, James Youngman wrote:
> > You may want to set errno to 0 immediately before the write call.
>  Well, it makes sense when write() returns zero, because when -1 is
>  returned the errno is set appropriately.
> 
>  I have no clue when write() returns zero (if count != 0). Any idea?

Some OSes return 0 on end of file.  For full complete "posixness", errno
should only be checked when the syscall returns -1, and never be cleared.

In that case, a return of zero should terminate the write, and return
how ever many bytes were written to that point.

lamont
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