Give pact several process IDs. When one process ID dies, pact will kill all provided PIDs.
Example usage:
#!/bin/bash
cmd1 &
PID1=$!
cmd2 --some-arg &
PID2=$!
./pact $PID1 $PID2
##Advanced usage
pact also accepts a one character modifier before the process ID. It can be either M or K. M monitors the process without killing it, and K will not monitor the process, but it will kill the process if another monitored process dies.
Example:
#!/bin/bash
(sleep 5)&
PID1=$!
(sleep 24h)&
PID2=$!
# If the shell dies, kill the other processes. If one of the
# processes die, don't kill the shell.
./pact $PID1 $PID2 M$$
# Pause, because otherwise the shell will immediately die and pact
# will kill the subprocesses.
pause