e0db9f3a6e
When `serialhdl` opens a terminal device it must prevent the device from becoming the controlling terminal of `klippy`, as such a terminal will send additional messages to the session leader, e.g. a SIGHUP, which would kill `klippy`. See e.g. #3981. pySerial already does this, but for e.g. `klipper_mcu` we were not doing this ourselves. On Linux a process must set `O_NOCTTY` when opening any file that could potentially be a terminal device, to avoid this. Earlier process daemonization tools prevent this from being an issue by double forking, but under `systemd` a process must take steps to avoid opening a controlling terminal. Signed-off-by: Lasse Dalegaard <dalegaard@gmail.com> Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Welcome to the Klipper project!
Klipper is a 3d-Printer firmware. It combines the power of a general purpose computer with one or more micro-controllers. See the features document for more information on why you should use Klipper.
To begin using Klipper start by installing it.
Klipper is Free Software. See the license or read the documentation.