74 lines
2.3 KiB
Groff
74 lines
2.3 KiB
Groff
.\"
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.\" Copyright (c) 1996 Joerg Wunsch
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.\"
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $Id: logwtmp.3,v 1.5 1997/05/11 08:50:33 davidn Exp $
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.\" "
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.Dd December 29, 1996
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.Os
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.Dt LOGWTMP 3
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.Sh NAME
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.Nm logwtmp
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.Nd append a new record to the wtmp file
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.Sh SYNOPSIS
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.Fd #include <sys/types.h>
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.Fd #include <libutil.h>
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.Ft void
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.Fn logwtmp "const char *line" "const char *name" "const char *host"
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.Pp
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Link with
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.Va -lutil
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on the
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.Xr cc 1
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command line.
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.Sh DESCRIPTION
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The function
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.Fn logwtmp
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tries to append a new record to the
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.Xr wtmp 5
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file, using the provided arguments
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.Ar line ,
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.Ar name ,
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and
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.Ar host ,
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and the current time.
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.Pp
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If the length of the hostname string
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.Ar host
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is longer than what would fit into the hostname field of the
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.Xr wtmp 5
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file, it will first be attempted to convert it into a numerical IP
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address using
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.Xr gethostbyname 3 .
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Failing this, the hostname will be recorded as
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.Qq invalid hostname .
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.Pp
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The calling process must have permission to write to both files.
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.Sh RETURN VALUES
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None.
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.Sh SEE ALSO
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.Xr gethostbyname 3 ,
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.Xr login 3 ,
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.Xr wtmp 5
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