login.3   [plain text]


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.Dd December 14, 1995
.Dt LOGIN 3
.Os
.Sh NAME
.Nm login ,
.Nm logout ,
.Nm logwtmp
.Nd login utility functions (DEPRECATED)
.Sh SYNOPSIS
.Fd #include <util.h>
.Ft void
.Fn login "struct utmp *ut"
.Ft int
.Fn logout "const char *line"
.Ft void
.Fn logwtmp "const char *line" "const char *name" "const char *host"
.Sh DESCRIPTION
The
.Fn login ,
.Fn logout ,
and
.Fn logwtmp
functions are
.Sy DEPRECATED ;
use
.Xr pututxline 3
instead.
.Pp
These functions operate on the database of current users in
.Pa /var/run/utmpx
and the system log file.
Superuser permission is required.
.Pp
The
.Fn login
function updates the
.Pa /var/run/utmpx
files with user information contained in
.Fa ut
(after converting to a struct utmpx, as described in
.Xr pututxline 3 ) .
.Pp
The
.Fn logout
function removes the entry from
.Pa /var/run/utmpx
corresponding to the device
.Fa line .
.Pp
The
.Fn logwtmp
function adds an entry to
the system log file.
Since
.Fn login
will add the appropriate entry
during a login,
.Fn logwtmp
is usually used for logouts.
.Sh RETURN VALUES
.Fn logout
returns non-zero if it was able to find and delete an entry for
.Fa line ,
and zero if there is no entry for
.Fa line
in
.Pa /var/run/utmpx .
However, there is no error indication due to lack of permissions.
.Sh FILES
.Bl -tag -width /var/run/wtmp -compact
.It Pa /dev/\(**
.It Pa /var/run/utmpx
.El
.Sh SEE ALSO
.Xr pututxline 3 ,
.Xr utmp 5 ,
.Xr utmpx 5