The openmpcd executable installs a custom signal handler, which overrides the following behaviors:

• If SIGHUP is received, the signal is ignored, so that the program does not terminate if the launching terminal disconnects;
• If SIGINT (e.g. created via Ctrl+C) or SIGTERM (e.g. by kill) is received for the first time, a flag will be set that instructs the program to terminate after the current sweep-measurement-cycle, saving measured data as usual. If another SIGINT or SIGTERM is received, the program aborts immediately, without saving data;
• If SIGUSR1 is received (e.g. via kill -USR1), the simulation will save all data to a newly created directory EarlySave_YYYY-MM-DD_hh:mm:ss within the run directory, with the current date and time substituted, after the current sweep, and then proceed the simulation as normal.