Sending interrupt does not interrupt

[gauthier-voron]

On jobs with high RTT and printing a lot of stuff, Ctrl-C does not stop the job. Steps to reproduce:

• spawn 4 servers on AWS regions: Sao Paulo, Cape Town, Tokyo, Sydney
• silk run HotStuff server on them
• try to Ctrl-C

Expected result: the HotStuff remote processes stop Observed result: the HotStuff processes continue to execute

[gauthier-voron]

Able to reproduce.

$ printf '#!/bin/bash\nsleep 3600\n' | silk run -L localhost:3200 -

The interrupt signal is sent to the shell script whereas the sleep process is in foreground. The interrupt should probably be sent to the whole process tree or to the process session.

[gauthier-voron]

Fixed by 7db2ee5421d249d75d9d6c3188861f792c42e543