ccc28f774a
which stops to proceed further, as it is possible that processes which fails to create PID file get screwed by rotation. Requested by: stas MFC after: 2 weeks X-MFC with: r200806
262 lines
6.8 KiB
Groff
262 lines
6.8 KiB
Groff
.\" This file contains changes from the Open Software Foundation.
|
|
.\"
|
|
.\" from: @(#)newsyslog.8
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.\" Copyright 1988, 1989 by the Massachusetts Institute of Technology
|
|
.\"
|
|
.\" Permission to use, copy, modify, and distribute this software
|
|
.\" and its documentation for any purpose and without fee is
|
|
.\" hereby granted, provided that the above copyright notice
|
|
.\" appear in all copies and that both that copyright notice and
|
|
.\" this permission notice appear in supporting documentation,
|
|
.\" and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
|
|
.\" used in advertising or publicity pertaining to distribution
|
|
.\" of the software without specific, written prior permission.
|
|
.\" M.I.T. and the M.I.T. S.I.P.B. make no representations about
|
|
.\" the suitability of this software for any purpose. It is
|
|
.\" provided "as is" without express or implied warranty.
|
|
.\"
|
|
.Dd January 19, 2010
|
|
.Dt NEWSYSLOG 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm newsyslog
|
|
.Nd maintain system log files to manageable sizes
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl CFNPnrsv
|
|
.Op Fl R Ar tagname
|
|
.Op Fl a Ar directory
|
|
.Op Fl d Ar directory
|
|
.Op Fl f Ar config_file
|
|
.Op Ar
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility should be scheduled to run periodically by
|
|
.Xr cron 8 .
|
|
When it is executed it archives log files if necessary.
|
|
If a log file
|
|
is determined to require archiving,
|
|
.Nm
|
|
rearranges the files so that
|
|
.Dq Va logfile
|
|
is empty,
|
|
.Dq Va logfile Ns Li \&.0
|
|
has
|
|
the last period's logs in it,
|
|
.Dq Va logfile Ns Li \&.1
|
|
has the next to last
|
|
period's logs in it, and so on, up to a user-specified number of
|
|
archived logs.
|
|
Optionally the archived logs can be compressed to save
|
|
space.
|
|
.Pp
|
|
A log can be archived for three reasons:
|
|
.Bl -enum -offset indent
|
|
.It
|
|
It is larger than the configured size (in kilobytes).
|
|
.It
|
|
A configured number of hours have elapsed since the log was last
|
|
archived.
|
|
.It
|
|
This is the specific configured hour for rotation of the log.
|
|
.El
|
|
.Pp
|
|
The granularity of
|
|
.Nm
|
|
is dependent on how often it is scheduled to run by
|
|
.Xr cron 8 .
|
|
Since the program is quite fast, it may be scheduled to run every hour
|
|
without any ill effects,
|
|
and mode three (above) assumes that this is so.
|
|
.Sh OPTIONS
|
|
The following options can be used with
|
|
.Nm :
|
|
.Bl -tag -width indent
|
|
.It Fl f Ar config_file
|
|
Instruct
|
|
.Nm
|
|
to use
|
|
.Ar config_file
|
|
instead of
|
|
.Pa /etc/newsyslog.conf
|
|
for its configuration file.
|
|
.It Fl a Ar directory
|
|
Specify a
|
|
.Ar directory
|
|
into which archived log files will be written.
|
|
If a relative path is given,
|
|
it is appended to the path of each log file
|
|
and the resulting path is used as the directory
|
|
into which the archived log for that log file will be written.
|
|
If an absolute path is given,
|
|
all archived logs are written into the given
|
|
.Ar directory .
|
|
If any component of the path
|
|
.Ar directory
|
|
does not exist,
|
|
it will be created when
|
|
.Nm
|
|
is run.
|
|
.It Fl d Ar directory
|
|
Specify a
|
|
.Ar directory
|
|
which all log files will be relative to.
|
|
To allow archiving of logs outside the root, the
|
|
.Ar directory
|
|
passed to the
|
|
.Fl a
|
|
option is unaffected.
|
|
.It Fl v
|
|
Place
|
|
.Nm
|
|
in verbose mode.
|
|
In this mode it will print out each log and its
|
|
reasons for either trimming that log or skipping it.
|
|
.It Fl n
|
|
Cause
|
|
.Nm
|
|
not to trim the logs, but to print out what it would do if this option
|
|
were not specified.
|
|
.It Fl r
|
|
Remove the restriction that
|
|
.Nm
|
|
must be running as root.
|
|
Of course,
|
|
.Nm
|
|
will not be able to send a HUP signal to
|
|
.Xr syslogd 8
|
|
so this option should only be used in debugging.
|
|
.It Fl s
|
|
Specify that
|
|
.Nm
|
|
should not send any signals to any daemon processes that it would
|
|
normally signal when rotating a log file.
|
|
For any log file which is rotated, this option will usually also
|
|
mean the rotated log file will not be compressed if there is a
|
|
daemon which would have been signalled without this option.
|
|
However, this option is most likely to be useful when specified
|
|
with the
|
|
.Fl R
|
|
option, and in that case the compression will be done.
|
|
.It Fl C
|
|
If specified once, then
|
|
.Nm
|
|
will create any log files which do not exist, and which have the
|
|
.Sy C
|
|
flag specified in their config file entry.
|
|
If specified multiple times, then
|
|
.Nm
|
|
will create all log files which do not already exist.
|
|
If log files are given on the command-line, then the
|
|
.Fl C
|
|
or
|
|
.Fl CC
|
|
will only apply to those specific log files.
|
|
.It Fl F
|
|
Force
|
|
.Nm
|
|
to trim the logs, even if the trim conditions have not been met.
|
|
This
|
|
option is useful for diagnosing system problems by providing you with
|
|
fresh logs that contain only the problems.
|
|
.It Fl N
|
|
Do not perform any rotations.
|
|
This option is intended to be used with the
|
|
.Fl C
|
|
or
|
|
.Fl CC
|
|
options when creating log files is the only objective.
|
|
.It Fl P
|
|
Prevent further action if we should send signal but the
|
|
.Dq pidfile
|
|
is empty or does not exist.
|
|
.It Fl R Ar tagname
|
|
Specify that
|
|
.Nm
|
|
should rotate a given list of files, even if trim conditions are not
|
|
met for those files.
|
|
The
|
|
.Ar tagname
|
|
is only used in the messages written to the log files which are
|
|
rotated.
|
|
This differs from the
|
|
.Fl F
|
|
option in that one or more log files must also be specified, so that
|
|
.Nm
|
|
will only operate on those specific files.
|
|
This option is mainly intended for the daemons or programs which write
|
|
some log files, and want to trigger a rotate based on their own criteria.
|
|
With this option they can execute
|
|
.Nm
|
|
to trigger the rotate when they want it to happen, and still give the
|
|
system administrator a way to specify the rules of rotation (such as how
|
|
many backup copies are kept, and what kind of compression is done).
|
|
When a daemon does execute
|
|
.Nm
|
|
with the
|
|
.Fl R
|
|
option, it should make sure all of the log files are closed before
|
|
calling
|
|
.Nm ,
|
|
and then it should re-open the files after
|
|
.Nm
|
|
returns.
|
|
Usually the calling process will also want to specify the
|
|
.Fl s
|
|
option, so
|
|
.Nm
|
|
will not send a signal to the very process which called it to force
|
|
the rotate.
|
|
Skipping the signal step will also mean that
|
|
.Nm
|
|
will return faster, since
|
|
.Nm
|
|
normally waits a few seconds after any signal that is sent.
|
|
.El
|
|
.Pp
|
|
If additional command line arguments are given,
|
|
.Nm
|
|
will only examine log files that match those arguments; otherwise, it
|
|
will examine all files listed in the configuration file.
|
|
.Sh FILES
|
|
.Bl -tag -width /etc/newsyslog.confxxxx -compact
|
|
.It Pa /etc/newsyslog.conf
|
|
.Nm
|
|
configuration file
|
|
.El
|
|
.Sh COMPATIBILITY
|
|
Previous versions of the
|
|
.Nm
|
|
utility used the dot (``.'') character to
|
|
distinguish the group name.
|
|
Beginning with
|
|
.Fx 3.3 ,
|
|
this has been changed to a colon (``:'') character so that user and group
|
|
names may contain the dot character.
|
|
The dot (``.'') character is still
|
|
accepted for backwards compatibility.
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
utility originated from
|
|
.Nx
|
|
and first appeared in
|
|
.Fx 2.2 .
|
|
.Sh AUTHORS
|
|
.An Theodore Ts'o ,
|
|
MIT Project Athena
|
|
.Pp
|
|
Copyright 1987, Massachusetts Institute of Technology
|
|
.Sh "SEE ALSO"
|
|
.Xr bzip2 1 ,
|
|
.Xr gzip 1 ,
|
|
.Xr syslog 3 ,
|
|
.Xr newsyslog.conf 5 ,
|
|
.Xr chown 8 ,
|
|
.Xr syslogd 8
|
|
.Sh BUGS
|
|
Does not yet automatically read the logs to find security breaches.
|