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BSD 2.11 - man page for syslogd (bsd section 8)

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SYSLOGD(8) 									         SYSLOGD(8) 

NAME
       syslogd - log systems messages

SYNOPSIS
       syslogd [ -fconfigfile ] [ -mmarkinterval ] [ -d ]

DESCRIPTION
       Syslogd	reads  and  logs messages into a set of files described by the configuration file
       /etc/syslog.conf.  Each message is one line.  A	message  can  contain  a  priority  code,
       marked  by  a number in angle braces at the beginning of the line.  Priorities are defined
       in <sys/syslog.h>.  Syslogd reads from the UNIX domain socket /dev/log, from  an  Internet
       domain  socket  specified in /etc/services, and from the special device /dev/klog (to read
       kernel messages).

       Syslogd configures when it starts up and whenever it receives a hangup signal.	Lines  in
       the  configuration  file  have a selector to determine the message priorities to which the
       line applies and an action.  The action field are separated from the selector  by  one  or
       more tabs.

       Selectors  are  semicolon  separated  lists  of	priority specifiers.  Each priority has a
       facility describing the part of the system that generated the message, a dot, and a  level
       indicating  the severity of the message.  Symbolic names may be used.  An asterisk selects
       all facilities.	All messages of the specified level  or  higher  (greater  severity)  are
       selected.   More  than  one  facility  may be selected using commas to separate them.  For
       example:

	    *.emerg;mail,daemon.crit

       Selects all facilities at the emerg level and the mail and daemon facilities at	the  crit
       level.

       Known  facilities  and  levels recognized by syslogd are those listed in   syslog(3)  without
       the leading ``LOG_''.  The additional facility ``mark'' has a message at priority LOG_INFO
       sent to it every 20 minutes (this may be changed with the -m flag).  The ``mark'' facility
       is not enabled by a facility field containing an asterisk.  The level ``none'' may be used
       to disable a particular facility.  For example,

	    *.debug;mail.none

       Sends all messages except mail messages to the selected file.

       The  second  part of each line describes where the message is to be logged if this line is
       selected.  There are four forms:

       o  A filename (beginning with a leading slash).	The file will be opened in append mode.

       o  A hostname preceeded by an at sign (``@'').  Selected messages  are  forwarded  to  the
	  syslogd on the named host.

       o  A  comma separated list of users.  Selected messages are written to those users if they
	  are logged in.

       o  An asterisk.	Selected messages are written to all logged-in users.

       Blank lines and lines beginning with `#' are ignored.

       For example, the configuration file:

	   kern,mark.debug	  /dev/console
	   *.notice;mail.info	  /usr/spool/adm/syslog
	   *.crit		  /usr/adm/critical
	   kern.err		  @ucbarpa
	   *.emerg		  *
	   *.alert		  eric,kridle
	   *.alert;auth.warning   ralph

       logs all kernel messages and 20 minute marks onto  the  system  console,  all  notice  (or
       higher)	level  messages  and all mail system messages except debug messages into the file
       /usr/spool/adm/syslog, and all critical messages into /usr/adm/critical;  kernel  messages
       of  error  severity or higher are forwarded to ucbarpa.	All users will be informed of any
       emergency messages, the users ``eric'' and ``kridle'' will be informed of any  alert  mes-
       sages,  and  the user ``ralph'' will be informed of any alert message, or any warning mes-
       sage (or higher) from the authorization system.

       The flags are:

       -f   Specify an alternate configuration file.

       -m   Select the number of minutes between mark messages.

       -d   Turn on debugging.

       Syslogd creates the file /var/run/syslog.pid, if possible, containing a single  line  with
       its process id.	This can be used to kill or reconfigure syslogd.

       To  bring syslogd down, it should be sent a terminate signal (e.g. kill `cat /var/run/sys-
       log.pid`).

FILES
       /etc/syslog.conf        the configuration file
       /var/run/syslog.pid     the process id
       /dev/log 	       Name of the UNIX domain datagram log socket
       /dev/klog	       The kernel log device

SEE ALSO
         logger(1) ,   syslog(3) 

4.2 Berkeley Distribution		November 16, 1996			         SYSLOGD(8)
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