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 (‘\n’).
The logname utility explicitly ignores the LOGNAME and USER environment variables because the environment cannot be trusted.
EXIT STATUS
The logname utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
STANDARDS
The logname utility is compliant with the IEEE Std 1003.1-2008 (“POSIX.1”) specification.
HISTORY
The logname command first appeared in PWB/UNIX 1.0 and was reimplemented for 4.3BSD-Net/2.