43bd0b5956
messages received from the network. Useful for collecting logs from devices which do not have correct time. Add it to usage. Document it, also document that syslogd adds a timestamp with the local time if it does not recognize the original timestamp field. Bump date. Approved by wrstuden@.
270 lines
7.1 KiB
Groff
270 lines
7.1 KiB
Groff
.\" $NetBSD: syslogd.8,v 1.39 2006/04/19 21:18:50 pavel Exp $
|
|
.\"
|
|
.\" Copyright (c) 1983, 1986, 1991, 1993
|
|
.\" The Regents of the University of California. 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.
|
|
.\" 3. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
|
|
.\"
|
|
.\" from: @(#)syslogd.8 8.1 (Berkeley) 6/6/93
|
|
.\"
|
|
.Dd April 19, 2006
|
|
.Dt SYSLOGD 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm syslogd
|
|
.Nd log systems messages
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl dnrSsUv
|
|
.Bk -words
|
|
.Op Fl f Ar config_file
|
|
.Ek
|
|
.Bk -words
|
|
.Op Fl g Ar group
|
|
.Ek
|
|
.Bk -words
|
|
.Op Fl m Ar mark_interval
|
|
.Ek
|
|
.Bk -words
|
|
.Op Fl P Ar file_list
|
|
.Ek
|
|
.Bk -words
|
|
.Oo
|
|
.Fl p Ar log_socket
|
|
.Op Fl p Ar log_socket2 ...
|
|
.Oc
|
|
.Ek
|
|
.Bk -words
|
|
.Op Fl t Ar chroot_dir
|
|
.Ek
|
|
.Bk -words
|
|
.Op Fl u Ar user
|
|
.Ek
|
|
.Sh DESCRIPTION
|
|
.Nm
|
|
reads and logs messages to the system console, log files, other
|
|
machines and/or users as specified by its configuration file.
|
|
The options are as follows:
|
|
.Bl -tag -width 15n
|
|
.It Fl d
|
|
Enable debugging to the standard output,
|
|
and do not disassociate from the controlling terminal.
|
|
.It Fl f
|
|
Specify the pathname of an alternative configuration file;
|
|
the default is
|
|
.Pa /etc/syslog.conf .
|
|
.It Fl g Ar group
|
|
Set GID to
|
|
.Ar group
|
|
after the sockets and log files have been opened.
|
|
.It Fl m
|
|
Select the number of minutes between ``mark'' messages;
|
|
the default is 20 minutes.
|
|
.It Fl n
|
|
Do not perform hostname lookups; report only numeric addresses.
|
|
.It Fl P
|
|
Specify the pathname of a file containing a list of sockets to be
|
|
created.
|
|
The format of the file is simply one socket per line.
|
|
.It Fl p
|
|
Specify the pathname of a log socket.
|
|
Multiple
|
|
.Fl p
|
|
options create multiple log sockets.
|
|
If no
|
|
.Fl p
|
|
arguments are created, the default socket of
|
|
.Pa /var/run/log
|
|
is used.
|
|
.It Fl r
|
|
Disable the compression of repeated instances of the same line
|
|
into a single line of the form
|
|
.Dq last message repeated N times .
|
|
.It Fl S
|
|
Sync kernel messages to disk immediately.
|
|
.It Fl s
|
|
Select
|
|
.Dq secure
|
|
mode, in which
|
|
.Nm
|
|
does not listen on a UDP socket but only communicates over a
|
|
.Ux
|
|
domain socket.
|
|
This is valuable when the machine on
|
|
which
|
|
.Nm
|
|
runs is subject to attack over the network and it is desired
|
|
that the machine be protected from attempts to remotely fill logs
|
|
and similar attacks.
|
|
.It Fl t Ar chroot_dir
|
|
.Xr chroot 2
|
|
to
|
|
.Ar chroot_dir
|
|
after the sockets and log files have been opened.
|
|
.It Fl T
|
|
Always use the local time and date for messages received from the
|
|
network, instead of the timestamp field supplied in the message
|
|
by the remote host.
|
|
This is useful if some of the originating hosts can't keep time
|
|
properly or are unable to generate a correct timestamp.
|
|
.It Fl u Ar user
|
|
Set UID to
|
|
.Ar user
|
|
after the sockets and log files have been opened.
|
|
.It Fl U
|
|
Unique priority logging.
|
|
Only log messages at the priority specified by the selector in the
|
|
configuration file.
|
|
Without this option, messages at the specified priority or higher are
|
|
logged.
|
|
This option changes the default priority comparison from
|
|
.Sq \*[Gt]=
|
|
to
|
|
.Sq = .
|
|
.It Fl v
|
|
Verbose logging.
|
|
If specified once, the numeric facility and priority are logged with
|
|
each locally-written message.
|
|
If specified more than once, the names of the facility and priority are
|
|
logged with each locally-written message.
|
|
.El
|
|
.Pp
|
|
.Nm
|
|
reads its configuration file when it starts up and whenever it
|
|
receives a hangup signal.
|
|
For information on the format of the configuration file,
|
|
see
|
|
.Xr syslog.conf 5 .
|
|
.Pp
|
|
.Nm
|
|
reads messages from the
|
|
.Ux
|
|
domain socket
|
|
.Pa /var/run/log ,
|
|
from an Internet domain socket specified in
|
|
.Pa /etc/services ,
|
|
and from the special device
|
|
.Pa /dev/klog
|
|
(to read kernel messages).
|
|
.Pp
|
|
.Nm
|
|
creates the file
|
|
.Pa /var/run/syslogd.pid ,
|
|
and stores its process
|
|
id there.
|
|
This can be used to kill or reconfigure
|
|
.Nm .
|
|
.Pp
|
|
By using multiple
|
|
.Fl p
|
|
options, one can set up many chroot environments by passing the pathname
|
|
to the log socket
|
|
.Pa ( /var/run/log )
|
|
in each chroot area to
|
|
.Nm .
|
|
For example:
|
|
.Dl syslogd -p /var/run/log -p /web/var/run/log -p /ftp/var/run/log
|
|
.Pp
|
|
Note: the normal log socket must now also be passed to
|
|
.Nm .
|
|
.Pp
|
|
The logged message includes the date, time, and hostname (or pathname of
|
|
the log socket).
|
|
Commonly, the program name and the process id is included.
|
|
.Pp
|
|
The date and time are taken from the received message.
|
|
If the format of the timestamp field is incorrect, time obtained from
|
|
the local host is used instead.
|
|
This can be overriden by the
|
|
.Fl T
|
|
flag.
|
|
.Pp
|
|
Accesses from UDP socket can be filtered by libwrap configuration files, like
|
|
.Pa /etc/hosts.deny .
|
|
Specify
|
|
.Dq Li syslogd
|
|
in
|
|
.Ar daemon_list
|
|
portion of the configuration files.
|
|
Refer to
|
|
.Xr hosts_access 5
|
|
for details.
|
|
.Ss SYSLOG PROTOCOL NOTES
|
|
The message sent to
|
|
.Nm
|
|
should consist of a single line.
|
|
The message can contain a priority code, which should be a preceding
|
|
decimal number in angle braces, for example,
|
|
.Sq Aq 5 .
|
|
This priority code should map into the priorities defined in the
|
|
include file
|
|
.Aq Pa sys/syslog.h .
|
|
See RFC 3164 for detailed description of the message format.
|
|
.Pp
|
|
Messages from the local kernel that are not tagged with a priority code
|
|
receive the default facility
|
|
.Dv LOG_KERN
|
|
and priority
|
|
.Dv LOG_NOTICE .
|
|
All other untagged messages receive the default facility
|
|
.Dv LOG_USER
|
|
and priority
|
|
.Dv LOT_NOTICE .
|
|
.Sh FILES
|
|
.Bl -tag -width /var/run/syslogd.pid -compact
|
|
.It Pa /etc/syslog.conf
|
|
The configuration file.
|
|
.It Pa /var/run/syslogd.pid
|
|
The process id of current
|
|
.Nm .
|
|
.It Pa /var/run/log
|
|
Name of the
|
|
.Ux
|
|
domain datagram log socket.
|
|
.It Pa /dev/klog
|
|
The kernel log device.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr logger 1 ,
|
|
.Xr syslog 3 ,
|
|
.Xr services 5 ,
|
|
.Xr syslog.conf 5 ,
|
|
.Xr newsyslog 8
|
|
.Rs
|
|
.%R RFC
|
|
.%N 3164
|
|
.%D August 2001
|
|
.%T The BSD syslog Protocol
|
|
.Re
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
command appeared in
|
|
.Bx 4.3 .
|
|
Support for multiple log sockets appeared in
|
|
.Nx 1.4 .
|
|
libwrap support appeared in
|
|
.Nx 1.6 .
|