NAME
login, logout,
logwtmp —
login utility functions
SYNOPSIS
#include <utmp.h>
#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
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
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
- /dev/∗
- /etc/ttys
- /var/run/utmp
- /var/log/wtmp