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1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
161 lines
4.8 KiB
Groff
161 lines
4.8 KiB
Groff
.\" This file contains changes from the Open Software Foundation.
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.\"
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.\" from: @(#)newsyslog.8
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.\" $FreeBSD$
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.\"
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.\" Copyright 1988, 1989 by the Massachusetts Institute of Technology
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.\"
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.\" Permission to use, copy, modify, and distribute this software
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.\" and its documentation for any purpose and without fee is
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.\" hereby granted, provided that the above copyright notice
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.\" appear in all copies and that both that copyright notice and
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.\" this permission notice appear in supporting documentation,
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.\" and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
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.\" used in advertising or publicity pertaining to distribution
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.\" of the software without specific, written prior permission.
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.\" M.I.T. and the M.I.T. S.I.P.B. make no representations about
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.\" the suitability of this software for any purpose. It is
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.\" provided "as is" without express or implied warranty.
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.\"
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.Dd "January 12, 1989"
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.Dt NEWSYSLOG 8
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.Os
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.Sh NAME
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.Nm newsyslog
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.Nd maintain system log files to manageable sizes
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.Sh SYNOPSIS
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.Nm newsyslog
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.Op Fl rnv
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.Op Fl f Ar config_file
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.Sh DESCRIPTION
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.Nm Newsyslog
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is a program that should be scheduled to run periodically by
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.Xr cron 8 .
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When it is executed it archives log files if necessary. If a log file
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is determined to require archiving,
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.Nm newsyslog
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rearranges the files so that ``logfile'' is empty, ``logfile.0'' has
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the last period's logs in it, ``logfile.1'' has the next to last
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period's logs in it, and so on, up to a user-specified number of
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archived logs. Optionally the archived logs can be compressed to save
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space.
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.Pp
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A log can be archived because of two reasons. The log file can have
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grown bigger than a preset size in kilobytes, or a preset number of
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hours may have elapsed since the last log archive. The granularity of
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.Nm newsyslog
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is dependent on how often it is scheduled to run by
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.Xr cron 8 .
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Since the program is quite fast, it may be scheduled to run every hour
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without any ill effects.
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.Pp
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When starting up,
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.Nm newsyslog
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reads in a configuration file to determine which logs should be looked
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at. By default, this configuration file is
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.Pa /etc/newsyslog.conf .
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Each line of the file contains information about a particular log file
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that should be handled by
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.Nm newsyslog .
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Each line has five mandatory fields and two optional fields, with a
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whitespace separating each field. Blank lines or lines beginning with
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``#'' are ignored. The fields of the configuration file are as
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follows:
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.Pp
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.Bl -tag -width logfile_namexxxx
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.It Ar logfile_name
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Name of the system log file to be archived.
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.It Ar owner.group
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Specifies the owner and group for the archive file.
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The "." is essential, even if the
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.Ar owner
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or
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.Ar group
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field is left blank. The field may be numeric, or a name which is
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present in
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.Pa /etc/passwd
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or
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.Pa /etc/group.
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.It Ar mode
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Specifies the mode of the log file and archives.
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.It Ar count
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Specifies the number of archive files to be kept
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besides the log file itself.
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.It Ar size
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When the size of the log file reaches
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.Ar size ,
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the log file will be trimmed as described above. If this field
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is replaced by a
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.Ar * ,
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then the size of the log file is not taken into account
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when determining when to trim the log file.
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of archives
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.It Ar interval
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When
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.Ar interval
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hours have passed, the log file will be trimmed. If this field is
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replaced by a
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.Ar * ,
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then the number of hours since the last time the log was
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trimmed will not be taken into consideration.
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.It Ar flags
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This optional field specifies if the archive should have any
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special processing done to the archived log files.
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The
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.Ar Z
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flag will make the archive files compress to save space by
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using
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.Xr gzip 1 .
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The
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.Ar B
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flag means that the file is a binary file, and so the ASCII
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message which
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.Nm
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inserts to indicate the fact that the logs have been
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turned over should not be included.
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.El
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.Sh OPTIONS
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The following options can be used with newsyslog:
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.Bl -tag -width indent
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.It Fl f Ar config_file
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instructs newsyslog to use
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.Ar config_file
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instead of
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.Pa /etc/newsyslog.conf
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for its configuration file.
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.It Fl v
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places
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.Nm newsyslog
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in verbose mode. In this mode it will print out each log and its
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reasons for either trimming that log or skipping it.
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It Fl n
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causes
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.Nm newsyslog
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not to trim the logs, but to print out what it would do if this option
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were not specified.
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.It Fl r
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removes the restriction that
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.Nm newsyslog
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must be running as root. Of course,
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.Nm newsyslog
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will not be able to send a HUP signal to
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.Xr syslogd 8
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so this option should only be used in debugging.
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.El
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.Sh FILES
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.Bl -tag -width /etc/newsyslog.confxxxx -comapct
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.It Pa /etc/newsyslog.conf
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.Nm newsyslog
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configuration file.
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.El
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.Sh BUGS
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Doesn't yet automatically read the logs to find security breaches.
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.Sh AUTHOR
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Theodore Ts'o, MIT Project Athena
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.Pp
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Copyright 1987, Massachusetts Institute of Technology
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.Sh "SEE ALSO"
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.Xr gzip 1 ,
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.Xr syslog 3 ,
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.Xr syslogd 8
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