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+.\" 
+.\" Copyright (c) 1996 Joerg Wunsch
+.\" 
+.\" All rights reserved.
+.\" 
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+.\" 
+.\" $FreeBSD$
+.\" "
+.Dd December 29, 1996
+.Os
+.Dt LOGWTMP 3
+.Sh NAME
+.Nm logwtmp
+.Nd append a new record to the wtmp file
+.Sh SYNOPSIS
+.Fd #include <sys/types.h>
+.Fd #include <libutil.h>
+.Ft void
+.Fn logwtmp "const char *line" "const char *name" "const char *host"
+.Pp
+Link with
+.Va -lutil
+on the
+.Xr cc 1
+command line.
+.Sh DESCRIPTION
+The function
+.Fn logwtmp
+tries to append a new record to the
+.Xr wtmp 5
+file, using the provided arguments
+.Ar line ,
+.Ar name ,
+and
+.Ar host ,
+and the current time.
+.Pp
+If the length of the hostname string
+.Ar host
+is longer than what would fit into the hostname field of the
+.Xr wtmp 5
+file, it will first be attempted to convert it into a numerical IP
+address using
+.Xr gethostbyname 3 .
+Failing this, the hostname will be recorded as
+.Qq invalid hostname .
+.Pp
+The calling process must have permission to write to both files.
+.Sh RETURN VALUES
+None.
+.Sh SEE ALSO
+.Xr gethostbyname 3 ,
+.Xr login 3 ,
+.Xr wtmp 5