Archipelago » qemu

    size_t offset;

    union {

        struct qemu_signalfd_siginfo siginfo;

        char buf[128];

    } sig;

    /* try to read from signalfd, don't freak out if we can't read anything */

    offset = 0;

    while (offset < 128) {

        ssize_t len;

        len = read(aio_sig_fd, sig.buf + offset, 128 - offset);

        if (len == -1 && errno == EINTR)

            continue;

        if (len == -1 && errno == EAGAIN) {

            /* there is no natural reason for this to happen,

             * so we'll spin hard until we get everything just

             * to be on the safe side. */

            if (offset > 0)

                continue;

        }

        offset += len;

    }

    fcntl(aio_sig_fd, F_SETFL, O_NONBLOCK);