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-.\" 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.
-.\" 4. 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.
-.\"
-.\" @(#)syslogd.8 8.1 (Berkeley) 6/6/93
-.\" $FreeBSD$
-.\"
-.Dd May 13, 2008
-.Dt SYSLOGD 8
-.Os
-.Sh NAME
-.Nm syslogd
-.Nd log systems messages
-.Sh SYNOPSIS
-.Nm
-.Op Fl 468ACcdknosuv
-.Op Fl a Ar allowed_peer
-.Op Fl b Ar bind_address
-.Op Fl f Ar config_file
-.Op Fl l Oo Ar mode : Oc Ns Ar path
-.Op Fl m Ar mark_interval
-.Op Fl P Ar pid_file
-.Op Fl p Ar log_socket
-.Sh DESCRIPTION
-The
-.Nm
-utility reads and logs messages to the system console, log files, other
-machines and/or users as specified by its configuration file.
-.Pp
-The options are as follows:
-.Bl -tag -width indent
-.It Fl 4
-Force
-.Nm
-to use IPv4 addresses only.
-.It Fl 6
-Force
-.Nm
-to use IPv6 addresses only.
-.It Fl 8
-Tells
-.Nm
-not to interfere with 8-bit data. Normally
-.Nm
-will replace C1 control characters
-.Pq ISO 8859 and Unicode characters
-with their
-.Dq M- Ns Em x
-equivalent.
-Note, this option does not change the way
-.Nm
-alters control characters
-.Pq see Xr iscntrl 3 .
-They will always be replaced with their
-.Dq ^ Ns Em x
-equivalent.
-.It Fl A
-Ordinarily,
-.Nm
-tries to send the message to only one address
-even if the host has more than one A or AAAA record.
-If this option is specified,
-.Nm
-tries to send the message to all addresses.
-.It Fl a Ar allowed_peer
-Allow
-.Ar allowed_peer
-to log to this
-.Nm
-using UDP datagrams.
-Multiple
-.Fl a
-options may be specified.
-.Pp
-The
-.Ar allowed_peer
-option may be any of the following:
-.Bl -tag -width "ipaddr/masklen[:service]XX"
-.It Xo
-.Sm off
-.Ar ipaddr
-.No / Ar masklen
-.Op : Ar service
-.Sm on
-.Xc
-Accept datagrams from
-.Ar ipaddr
-(in the usual dotted quad notation) with
-.Ar masklen
-bits being taken into account when doing the address comparison.
-.Ar ipaddr
-can be also IPv6 address by enclosing the address with
-.Ql \&[
-and
-.Ql \&] .
-If specified,
-.Ar service
-is the name or number of an UDP service (see
-.Xr services 5 )
-the source packet must belong to.
-A
-.Ar service
-of
-.Ql \&*
-allows packets being sent from any UDP port.
-The default
-.Ar service
-is
-.Ql syslog .
-If
-.Ar ipaddr
-is IPv4 address, a missing
-.Ar masklen
-will be substituted by the historic class A or class B netmasks if
-.Ar ipaddr
-belongs into the address range of class A or B, respectively, or
-by 24 otherwise.
-If
-.Ar ipaddr
-is IPv6 address, a missing
-.Ar masklen
-will be substituted by 128.
-.It Xo
-.Sm off
-.Ar domainname Op : Ar service
-.Sm on
-.Xc
-Accept datagrams where the reverse address lookup yields
-.Ar domainname
-for the sender address.
-The meaning of
-.Ar service
-is as explained above.
-.It Xo
-.Sm off
-.No * Ar domainname Op : Ar service
-.Sm on
-.Xc
-Same as before, except that any source host whose name
-.Em ends
-in
-.Ar domainname
-will get permission.
-.El
-.Pp
-The
-.Fl a
-options are ignored if the
-.Fl s
-option is also specified.
-.It Xo
-.Fl b
-.Sm off
-.Ar bind_address Op : Ar service
-.Sm on
-.Xc
-.It Xo
-.Fl b
-.Sm off
-.Li : Ar service
-.Sm on
-.Xc
-Bind to a specific address and/or port.
-The address can be specified as a hostname,
-and the port as a service name.
-If an IPv6 address is specified, it should be enclosed with
-.Ql \&[
-and
-.Ql \&] .
-The default
-.Ar service
-is
-.Ql syslog .
-.It Fl C
-Create log files that do not exist (permission is set to
-.Li 0600 ) .
-.It Fl c
-Disable the compression of repeated instances of the same line
-into a single line of the form
-.Dq Li "last message repeated N times"
-when the output is a pipe to another program.
-If specified twice, disable this compression in all cases.
-.It Fl d
-Put
-.Nm
-into debugging mode.
-This is probably only of use to developers working on
-.Nm .
-.It Fl f
-Specify the pathname of an alternate configuration file;
-the default is
-.Pa /etc/syslog.conf .
-.It Fl k
-Disable the translation of
-messages received with facility
-.Dq kern
-to facility
-.Dq user .
-Usually the
-.Dq kern
-facility is reserved for messages read directly from
-.Pa /dev/klog .
-.It Fl m
-Select the number of minutes between
-.Dq mark
-messages; the default is 20 minutes.
-.It Fl n
-Disable dns query for every request.
-.It Fl o
-Prefix kernel messages with the full kernel boot file as determined by
-.Xr getbootfile 3 .
-Without this, the kernel message prefix is always
-.Dq Li kernel: .
-.It Fl p
-Specify the pathname of an alternate log socket to be used instead;
-the default is
-.Pa /var/run/log .
-.It Fl P
-Specify an alternative file in which to store the process ID.
-The default is
-.Pa /var/run/syslog.pid .
-.It Fl S
-Specify the pathname of an alternate log socket for privileged
-applications to be used instead; the default is
-.Pa /var/run/logpriv .
-.It Fl l
-Specify a location where
-.Nm
-should place an additional log socket.
-The primary use for this is to place additional log sockets in
-.Pa /var/run/log
-of various chroot filespaces.
-File permissions for socket can be specified in octal representation
-before socket name, delimited with a colon.
-Path to socket location must be absolute.
-.It Fl s
-Operate in secure mode.
-Do not log messages from remote machines.
-If
-specified twice, no network socket will be opened at all, which also
-disables logging to remote machines.
-.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
-Unique priority logging.
-Only log messages at the specified priority.
-Without this option, messages at the stated priority or higher are logged.
-This option changes the default comparison from
-.Dq =>
-to
-.Dq = .
-.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
-The
-.Nm
-utility 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
-The
-.Nm
-utility reads messages from the
-.Ux
-domain sockets
-.Pa /var/run/log
-and
-.Pa /var/run/logpriv ,
-from an Internet domain socket specified in
-.Pa /etc/services ,
-and from the special device
-.Pa /dev/klog
-(to read kernel messages).
-.Pp
-The
-.Nm
-utility creates its process ID file,
-by default
-.Pa /var/run/syslog.pid ,
-and stores its process
-ID there.
-This can be used to kill or reconfigure
-.Nm .
-.Pp
-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
-.In sys/syslog.h .
-.Pp
-For security reasons,
-.Nm
-will not append to log files that do not exist (unless
-.Fl C
-option is specified);
-therefore, they must be created manually before running
-.Nm .
-.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.
-.Sh FILES
-.Bl -tag -width /var/run/syslog.pid -compact
-.It Pa /etc/syslog.conf
-configuration file
-.It Pa /var/run/syslog.pid
-default process ID file
-.It Pa /var/run/log
-name of the
-.Ux
-domain datagram log socket
-.It Pa /var/run/logpriv
-.Ux
-socket for privileged applications
-.It Pa /dev/klog
-kernel log device
-.El
-.Sh SEE ALSO
-.Xr logger 1 ,
-.Xr syslog 3 ,
-.Xr services 5 ,
-.Xr syslog.conf 5 ,
-.Xr newsyslog 8
-.Sh HISTORY
-The
-.Nm
-utility appeared in
-.Bx 4.3 .
-.Pp
-The
-.Fl a ,
-.Fl s ,
-.Fl u ,
-and
-.Fl v
-options are
-.Fx 2.2
-extensions.
-.Sh BUGS
-The ability to log messages received in UDP packets is equivalent to
-an unauthenticated remote disk-filling service, and should probably be
-disabled by default.
-Some sort of
-.No inter- Ns Nm syslogd
-authentication mechanism ought to be worked out.
-To prevent the worst
-abuse, use of the
-.Fl a
-option is therefore highly recommended.
-.Pp
-The
-.Fl a
-matching algorithm does not pretend to be very efficient; use of numeric
-IP addresses is faster than domain name comparison.
-Since the allowed
-peer list is being walked linearly, peer groups where frequent messages
-are being anticipated from should be put early into the
-.Fl a
-list.
-.Pp
-The log socket was moved from
-.Pa /dev
-to ease the use of a read-only root file system.
-This may confuse
-some old binaries so that a symbolic link might be used for a
-transitional period.
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