On 2008-03-18, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > how to get ttyS0 serial port for exclusive access? I have a python > script that uses this device with AT commands. I need that two > instances can call simultaneosuly this python script but only one of > them gets the device. I tried fcntl.flock, it was just ignored, put > writtable file LCK..ttyS0 in /var/lock,
Using a lock file is the traditional method of providing mutually exclusive access to a serial port. > tried ioctl (but I may not know what are appropriate > arguments), googled half a day for various phrases, error > messages etc....without success. It's unclear what "without success" means. Lockfiles have been used for decades, and they work fine as long as all of the applications follow the rules. -- Grant -- http://mail.python.org/mailman/listinfo/python-list
