logname - print user's login name
Print the name of the current user.
display this help and exit
output version information and exit
Written by FIXME: unknown.
Copyright © 2020 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
or available locally via: info '(coreutils) logname invocation'