-bash-4.1$ ./test1.pl 
# open_ex: ['ssh','-O','check','-T','-S','/home/kburns/.libnet-openssh-perl/kburns-10.10.10.-20023-380016','-l','kburns','10.10.10.1','--']
# _waitpid(20025) => pid: 20025, rc: 
# open_ex: ['ssh','-S','/home/kburns/.libnet-openssh-perl/kburns-10.10.10.-20023-380016','-l','kburns','10.10.10.1','--','!bash']