I tried ready-made commands for file locking, and turned to that LCK file just in case some permissions are wrong and that's the reason the commands fail.
On 19 Marts, 15:43, Grant Edwards <[EMAIL PROTECTED]> wrote: > 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. Â 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
