Function ser_close

src/serial.c:987–1088

* \brief Close serial port * \param p fd * \return RIG_OK or < 0 */

 * \return RIG_OK or < 0
 */
int ser_close(hamlib_port_t *p)
{
    int rc;
    term_options_backup_t *term_backup, *term_backup_prev;

    //rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);

    /*
     * For microHam devices, do not close the
     * socket via close but call a service routine
     * (which might decide to keep the socket open).
     * However, unset p->fd and uh_ptt_fd/uh_radio_fd.
     */
    if (p->fd == uh_ptt_fd)
    {
        uh_close_ptt();
        uh_ptt_fd = -1;
        p->fd = -1;
        return (0);
    }

    if (p->fd == uh_radio_fd)
    {
        uh_close_radio();
        uh_radio_fd = -1;
        p->fd = -1;
        return (0);
    }

    // Find backup termios options to restore before closing
    term_backup = term_options_backup_head;
    term_backup_prev = term_options_backup_head;

    while (term_backup)
    {
        if (term_backup->fd == p->fd)
        {
            // Found matching. Remove from list
            if (term_backup == term_options_backup_head)
            {
                term_options_backup_head = term_backup->next;
            }
            else
            {
                term_backup_prev->next = term_backup->next;
            }

            break;
        }

        term_backup_prev = term_backup;
        term_backup = term_backup->next;
    }

    // Restore backup termios
    if (term_backup)
    {
        rig_debug(RIG_DEBUG_VERBOSE, "%s: restoring options\n", __func__);