logname — get login name
logname
logname writes the user's login name to standard output. The login name is equivalent to that returned by getlogin() (see getlogin(3C)).
LANG determines the language in which diagnostic messages are displayed.
/etc/profile
env(1), login(1), getlogin(3C), logname(3C), environ(5).
logname: SVID2, SVID3, XPG2, XPG3, XPG4, POSIX.2
