UTMP(V)                      9/10/73                      UTMP(V)


     utmp - user information


     This file allows one to discover information  about  who  is

     currently  using  UNIX.   The  file is binary; each entry is

     16(10) bytes long.  The first eight bytes contain  a  user's

     login name or are null if the table slot is unused.  The low

     order byte of the next word contains the last character of a

     typewriter  name.   The  next  two  words contain the user's

     login time.  The last word is unused.

     This file resides in directory /tmp.


     init (VIII) and login (I), which maintain the file;  who(I),

     which interprets it.