can we automatically wait the required time for smartmontools/smartctl?

Can we do something like this in a script (preferably zsh): smartctl -t long /dev/sda smartctl -t long /dev/sdb smartctl -t long /dev/sdc [Wait however long smartctl needs] smartctl -H /dev/sda smartctl -H /dev/sdb smartctl -H /dev/sdc As is obvious I'm just trying to automate this.