75 lines
2.4 KiB
Groff
75 lines
2.4 KiB
Groff
.\" $OpenBSD: log.9,v 1.11 2015/09/14 15:14:55 schwarze Exp $
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.\" $NetBSD: log.9,v 1.6 1999/08/17 05:24:06 enami Exp $
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.\"
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.\" Copyright (c) 1997 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Michael Graff.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd $Mdocdate: September 14 2015 $
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.Dt LOG 9
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.Os
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.Sh NAME
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.Nm log ,
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.Nm addlog
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.Nd log a message from the kernel through the /dev/klog device
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.Sh SYNOPSIS
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.In sys/syslog.h
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.Ft void
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.Fo log
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.Fa "int level"
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.Fa "const char *format"
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.Fa "..."
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.Fc
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.Ft void
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.Fn addlog "const char *format" ...
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.Sh DESCRIPTION
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The
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.Fn log
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function allows the kernel to send formatted messages to user processes
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listening on
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.Pa /dev/klog .
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Usually
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.Xr syslogd 8
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monitors
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.Pa /dev/klog
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for these messages and writes them to a log file.
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.Pp
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All messages are formatted using
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.Xr printf 9 ,
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logged using facility
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.Dv LOG_KERN ,
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and priority level
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.Fa level .
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.Pp
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The
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.Fn addlog
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function is used to build a log message in steps, by adding information
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to an initial call to
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.Fn log .
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.Sh SEE ALSO
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.Xr syslog 3 ,
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.Xr syslogd 8 ,
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.Xr printf 9
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