On Tue, Sep 22, 2015 at 05:14:42PM -0700, Stefan Beller wrote:
> We should not care if the call to poll failed, as we're in an infinite loop and
> can only get out with the correct read(..). So maybe an implementation like this
> would already suffice:
>
> ssize_t xread(int fd, void *buf, size_t len)
> {
> ssize_t nr;
> if (len > MAX_IO_SIZE)
> len = MAX_IO_SIZE;
> while (1) {
> nr = read(fd, buf, len);
> if (nr < 0) {
> if (errno == EINTR)
> continue;
> if (errno == EAGAIN || errno == EWOULDBLOCK) {
> struct pollfd pfd;
> pfd.events = POLLIN;
> pfd.fd = fd;
> /* We deliberately ignore the return value of poll. */
> poll(&pfd, 1, -1);
> continue;
> }
> }
> return nr;
> }
> }
FWIW, that is what I had imagined.
-Peff
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