NAME
getlogin - get login name
SYNOPSIS
#include <unistd.h>
char *getlogin(void)
DESCRIPTION
Getlogin returns a pointer to the login name as found in
/etc/utmp. It may be used in conjunction with getpwnam to
locate the correct password file entry when the same user ID
is shared by several login names.
If getlogin is called within a process that is not attached
to a terminal, or if there is no entry in /etc/utmp for the
process's terminal, getlogin returns a null pointer. A rea-
sonable procedure for determining the login name is to first
call getlogin and if it fails, to call getpwuid(getuid()).
FILES
/etc/utmp
SEE ALSO
getpwent(3), utmp(5), ttyslot(3)
DIAGNOSTICS
Returns a null pointer if the name cannot be found.
BUGS
The return values point to static data whose content is
overwritten by each call.