osx man page for logname

LOGNAME(1)						    BSD General Commands Manual 						LOGNAME(1)

NAME
     logname -- display user's login name

SYNOPSIS
     logname

DESCRIPTION
     The logname utility writes the user's login name to standard output followed by a newline.

     The logname utility explicitly ignores the LOGNAME and USER environment variables because the environment cannot be trusted.

     The logname utility exits 0 on success, and >0 if an error occurs.

SEE ALSO
     who(1), whoami(1), getlogin(2)

STANDARDS
     The logname utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').

HISTORY
     The logname command appeared in 4.4BSD.

4.4BSD								   June 9, 1993 							    4.4BSD