Miscellany

static bool wait_for_backend(int fd, int timeout_ms)
{
    struct timeval select_timeout = { 0, (timeout_ms % 1000) * 1000 /*usec*/};
    fd_set fd_select_set;
    FD_ZERO(    &fd_select_set);
    FD_SET (fd, &fd_select_set);

    // Try to wait for some output like an event, unfortunately
    // this fails on several DVB cards, so we have a timeout.
    select(fd+1, &fd_select_set, NULL, NULL, &select_timeout);

    // This is supposed to work on all cards, post 2.6.12...
    fe_status_t status;
    if (ioctl(fd, FE_READ_STATUS, &status) < 0)
    {
        VERBOSE(VB_IMPORTANT, QString("dvbchannel.cpp:wait_for_backend: "
                                      "Failed to get status, error: %1")
                .arg(strerror(errno)));
        return false;
    }

    VERBOSE(VB_CHANNEL, QString("dvbchannel.cpp:wait_for_backend: Status: %1")
            .arg(toString(status)));
    return true;
}