sessreg -VERSION (return code: 0)
sessreg 1.1.0
sessreg -h (return code: 1)
sessreg: -h requires an argument
sessreg: usage sessreg {-a -d} [-w wtmp-file] [-u utmp-file] [-L lastlog-file]
[-t ttys-file] [-l line-name] [-h host-name] [-V]
[-s slot-number] [-x servers-file] user-name