211 lines
6.2 KiB
Groff
211 lines
6.2 KiB
Groff
.\" Copyright 1994 Dr. Greg Wettstein, Enjellic Systems Development.
|
|
.\" May be distributed under the GNU General Public License
|
|
.\" Sun Aug 30 11:35:55 MET: Martin Schulze: Updates
|
|
.\"
|
|
.\" from SYSKLOGD 8 "13 December 1995" "Version 1.3" "Linux System Administration"
|
|
.\" Modified for Minix porting by G. Falzoni <gfalzoni@inwind.it>
|
|
.\"
|
|
.\" Local macros
|
|
.de Xr
|
|
.BR \\$1 (\\$2)\\$3
|
|
..
|
|
.de LB
|
|
.TP \\$1
|
|
\\fB\\$2\\fR
|
|
\\$3
|
|
..
|
|
.de LI
|
|
.TP \\$1
|
|
\\fI\\$2\\fR
|
|
\\$3
|
|
..
|
|
.de LR
|
|
.TP \\$1
|
|
\\fR\\$2\\fR
|
|
\\$3
|
|
..
|
|
.\" end local macros
|
|
.TH SYSLOGD 8 "Jan. 23, 2000"
|
|
.SH NAME
|
|
.PP
|
|
syslogd \- system logging daemon.
|
|
.SH SYNOPSIS
|
|
.PP
|
|
.B syslogd
|
|
.RB [ " \-d " ]
|
|
.RB [ " \-f "
|
|
.I config file
|
|
]
|
|
.RB [ " \-m "
|
|
.I interval
|
|
]
|
|
.RB [ " \-p"
|
|
.IB port
|
|
]
|
|
.RB [ " \-v " ]
|
|
.LP
|
|
.SH DESCRIPTION
|
|
.PP
|
|
System logging is provided by a version of
|
|
.BR syslogd (8)
|
|
derived from the
|
|
stock BSD sources.
|
|
.B Syslogd
|
|
provides the kind of logging that many modern programs use. Every logged
|
|
message contains at least a time, a hostname field and a
|
|
program name field, but that depends on how trusty the logging
|
|
program is.
|
|
.PP
|
|
While the syslogd sources have been heavily modified a couple of notes
|
|
are necessary. First of all there has been a systematic attempt to
|
|
insure that syslogd follows the default, standard BSD behavior.
|
|
The second important concept to note is that this version of syslogd
|
|
interacts transparently with the version of syslog found in the
|
|
standard libraries, so you must insure that the correct versions are installed.
|
|
.PP
|
|
The main configuration file
|
|
.I /etc/syslog.conf
|
|
or an alternative file, given with the
|
|
.B "\-f"
|
|
option, is read at startup. Any line that begins with the hash mark
|
|
(``#'') and empty lines are ignored. If an error occurs during parsing
|
|
the whole line is ignored.
|
|
.SH OPTIONS
|
|
.PP
|
|
.LB 9 "-d" "Turns on debug mode.
|
|
When using debug mode, the daemon will not proceed to
|
|
.BR fork (2)
|
|
to set itself in the background, but will stay in the
|
|
foreground and write much debug information on the current tty. See the
|
|
DEBUGGING section for more information.
|
|
.LB 9 "\-f config file" "Specify an alternative configuration file instead of
|
|
.IR /etc/syslog.conf ","
|
|
which is the default.
|
|
.LB 9 "\-m interval" "The syslogd logs a mark timestamp regularly. The default
|
|
.I interval
|
|
between two
|
|
.I \-\- MARK \-\-
|
|
lines is 20 minutes. This can be changed with this option.
|
|
.LB 9 "\-p port" "You can specify an alternative port instead of
|
|
.I syslog/udp
|
|
default service.
|
|
.LB 9 "\-v" "Print version and exit.
|
|
.SH SIGNALS
|
|
.PP
|
|
.B Syslogd
|
|
reacts to a set of signals. You may easily send a signal to it
|
|
using the following:
|
|
.IP
|
|
kill -SIGNAL `cat /usr/run/syslogd.pid`
|
|
.LB 9 SIGHUP "This lets syslogd perform a re-initialization.
|
|
All open files are closed, the configuration file (default
|
|
is '/etc/syslog.conf') will be reread.
|
|
.LB 9 SIGTERM "The syslogd will die.
|
|
.LB 9 "SIGINT SIGQUIT" "If debugging is enabled these are ignored, otherwise
|
|
syslogd will die.
|
|
.LB 9 SIGALRM "Every time syslogd receives this signal it will log
|
|
the mark line. Normally this is done by
|
|
.Xr alarm 2 .
|
|
.SH CONFIGURATION FILE SYNTAX DIFFERENCES
|
|
.PP
|
|
.B Syslogd
|
|
uses a slightly different syntax for its configuration file than
|
|
the original BSD sources. Originally all messages of a specific priority
|
|
and above were forwarded to the log file.
|
|
.PP
|
|
For example see the following sample file
|
|
.IP
|
|
## Sample syslog.conf
|
|
|
|
## Emergency messages (system may be unusable)
|
|
.br
|
|
*.emerg *
|
|
.br
|
|
*.alert /dev/log
|
|
|
|
## High severity errors
|
|
.br
|
|
*.alert;*.crit /usr/adm/syslog
|
|
|
|
## every other message (errors/warning and informational)
|
|
.br
|
|
*.info;*.notice;*.warning;*.err /usr/adm/messages
|
|
.br
|
|
*.debug /usr/adm/debug
|
|
|
|
.SH SUPPORT FOR REMOTE LOGGING
|
|
.PP
|
|
Not implemented.
|
|
.SH OUTPUT TO NAMED PIPES (FIFOs)
|
|
.PP
|
|
Not implemented.
|
|
.SH INSTALLATION CONCERNS
|
|
.PP
|
|
There is probably one important consideration when installing this
|
|
version of syslogd. This version of syslogd is dependent on proper
|
|
formatting of messages by the syslog function.
|
|
.PP
|
|
.B Syslogd
|
|
should be started by the rc sequence.
|
|
.SH DEBUGGING
|
|
.PP
|
|
When debugging is turned on using
|
|
.B "\-d"
|
|
option and syslogd is compiled with debug=1 then syslogd
|
|
will be very verbose by writing much of what it does on stdout.
|
|
Whenever
|
|
the configuration file is reread and re-parsed you'll see a tabular,
|
|
corresponding to the internal data structure. This tabular consists of
|
|
four fields:
|
|
.TP
|
|
.I number
|
|
This field contains a serial number starting by zero. This number
|
|
represents the position in the internal data structure (i.e. the
|
|
array). If one number is left out then there might be an error in the
|
|
corresponding line in
|
|
.IR /etc/syslog.conf .
|
|
.TP
|
|
.I pattern
|
|
This field is tricky and represents the internal structure
|
|
exactly. Every column stands for a facility (refer to
|
|
.BR syslog (3)).
|
|
As you can see, there are still some facilities left free for former
|
|
use, only the left most are used. Every field in a column represents
|
|
the priorities (refer to
|
|
.BR syslog (3)).
|
|
.TP
|
|
.I action
|
|
This field describes the particular action that takes place whenever a
|
|
message is received that matches the pattern. Refer to the
|
|
.BR syslog.conf (5)
|
|
manpage for all possible actions.
|
|
.TP
|
|
.I arguments
|
|
This field shows additional arguments to the actions in the last
|
|
field. For file-logging this is the filename for the logfile; for
|
|
user-logging this is a list of users; for remote logging this is the
|
|
hostname of the machine to log to; for console-logging this is the
|
|
used console; for tty-logging this is the specified tty; wall has no
|
|
additional arguments.
|
|
.PP
|
|
Note that if syslogd is compiled with debug=0 only a subset is printed.
|
|
.SH FILES
|
|
.PP
|
|
.LR 28 /etc/syslog.conf "Configuration file for syslogd. See
|
|
.Xr syslog.conf 5
|
|
for exact information.
|
|
.LR 28 /dev/log "The log device (console) for Minix.
|
|
.LR 28 /usr/run/syslogd.pid "The file containing the process id of syslogd.
|
|
.SH BUGS
|
|
.PP
|
|
If an error occurs in one line the whole rule is ignored.
|
|
.B Syslogd
|
|
doesn't change the filemode of opened logfiles at any stage of
|
|
process. If a file is created it is world readable. If you want to
|
|
avoid this, you have to create it and change permissions on your own.
|
|
.SH SEE ALSO
|
|
.BR syslog.conf (5),
|
|
.BR logger (1),
|
|
.BR syslog (3).
|
|
.\" .BR services (5),
|