Archipelago » qemu

#ifndef CONFIG_IOVEC

/* helper function for iov_send_recv() */

static ssize_t

readv_writev(int fd, const struct iovec *iov, int iov_cnt, bool do_write)

{

    unsigned i = 0;

    ssize_t ret = 0;

    while (i < iov_cnt) {

        ssize_t r = do_write

            ? write(fd, iov[i].iov_base, iov[i].iov_len)

            : read(fd, iov[i].iov_base, iov[i].iov_len);

        if (r > 0) {

            ret += r;

        } else if (!r) {

            break;

        } else if (errno == EINTR) {

            continue;

        } else {

            /* else it is some "other" error,

             * only return if there was no data processed. */

            if (ret == 0) {

                ret = -1;

            }

            break;

        }

        i++;

    }

    return ret;

}

ssize_t

readv(int fd, const struct iovec *iov, int iov_cnt)

{

    return readv_writev(fd, iov, iov_cnt, false);

}

ssize_t

writev(int fd, const struct iovec *iov, int iov_cnt)

{

    return readv_writev(fd, iov, iov_cnt, true);

}

#endif