LOGIN(3) BSD Library Functions Manual LOGIN(3)

NAME
     llooggiinn, llooggoouutt, llooggwwttmmpp - login utility functions

SYNOPSIS
     ##iinncclluuddee <>

     void
     llooggiinn(struct utmp *ut);

     int
     llooggoouutt(const char *line);

     void
     llooggwwttmmpp(const char *line, const char *name, const char *host);

DESCRIPTION
     The llooggiinn(), llooggoouutt(), and llooggwwttmmpp() functions operate on the database of
     current users in /var/run/utmp and on the logfile /var/log/wtmp of logins
     and logouts.

     The llooggiinn() function updates the /var/run/utmp and /var/log/wtmp files
     with user information contained in ut.

     The llooggoouutt() function removes the entry from /var/run/utmp corresponding
     to the device line.

     The llooggwwttmmpp() function adds an entry to /var/log/wtmp.  Since llooggiinn()
     will add the appropriate entry for /var/log/wtmp during a login,
     llooggwwttmmpp() is usually used for logouts.

RETURN VALUES
     llooggoouutt() returns non-zero if it was able to find and delete an entry for
     line, and zero if there is no entry for line in /var/run/utmp.

FILES     /dev/*
     /etc/ttys
     /var/run/utmp
     /var/log/wtmp

SEE ALSO
     utmp(5)

BSD                            December 14, 1995                           BSD