How to fire and forget a subprocess?

Question

I have a long running process and I need it to launch another process (that will run for a good while too). I need to only start it, and then completely forget about it.

Answer 1

i found the answers above broke my terminal and messed up the output. this is the solution i found.

   system("nohup ./test.sh &")

just in case anyone has the same issue, my goal was to log into a ssh server and then keep that process running indefinitely. so test.sh is this

#!/usr/bin/expect -f
spawn ssh host -l admin -i cloudkey  
expect "pass"
send "superpass\r"
sleep 1000000