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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