#!/usr/bin/expect -f set timeout 10 spawn $env(SHELL) match_max 100000 send -- "firejail --name=test --dns=1.2.3.4\r" expect { timeout {puts "TESTING ERROR 0\n";exit} "Child process initialized" } sleep 2 spawn $env(SHELL) send -- "firejail --dns.print=test\r" expect { timeout {puts "TESTING ERROR 1\n";exit} "nameserver 1.2.3.4" } sleep 1 puts "\nall done\n"