NAME    [Toc]    [Back]

     login, logout, logwtmp - login utility functions

LIBRARY    [Toc]    [Back]

     System Utilities Library (libutil, -lutil)

SYNOPSIS    [Toc]    [Back]

     #include <util.h>

     void
     login(struct utmp *ut);

     int
     logout(const char *line);

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

DESCRIPTION    [Toc]    [Back]

     The login(), logout(), and logwtmp() functions operate on the database of
     current users in /var/run/utmp and on the logfile /var/log/wtmp of logins
     and logouts.

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

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

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

RETURN VALUES    [Toc]    [Back]

     logout() 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    [Toc]    [Back]

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

SEE ALSO    [Toc]    [Back]

     utmp(5)

BSD                            December 14, 1995                           BSD