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Unix Version 7 - man page for getlogin (v7 section 3)

GETLOGIN(3)			     Library Functions Manual			      GETLOGIN(3)

NAME
       getlogin - get login name

SYNOPSIS
       char *getlogin();

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  userid
       is shared by several login names.

       If  getlogin  is  called within a process that is not attached to a typewriter, it returns
       NULL.  The correct procedure for determining the login name is to first call getlogin  and
       if it fails, to call getpwuid.

FILES
       /etc/utmp

SEE ALSO
       getpwent(3), getgrent(3), utmp(5)

DIAGNOSTICS
       Returns NULL (0) if name not found.

BUGS
       The return values point to static data whose content is overwritten by each call.

										      GETLOGIN(3)


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