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

[Karel Zak <kzak@xxxxxxxxxx>]

On Tue, Apr 15, 2008 at 12:34:08PM +0100, James Youngman wrote:
> On Mon, Apr 14, 2008 at 11:41 PM, Karel Zak <kzak@xxxxxxxxxx> wrote:
> > +write_all(int fd, const void *buf, size_t count) {
> >  +       while(count) {
> >  +               ssize_t tmp = write(fd, buf, count);
> >  +
> >  +               if (tmp > 0) {
> >  +                       count -= tmp;
> >  +                       if (count)
> >  +                               buf += tmp;
> >
> > +               } else if (errno != EINTR && errno != EAGAIN)
> >  +                       return -1;
> >  +       }
> >  +       return 0;
> 
> 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?

    Karel

-- 
 Karel Zak  <kzak@xxxxxxxxxx>
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