348 lines
8.8 KiB
Groff
348 lines
8.8 KiB
Groff
.\" This file was split from the newsyslog(8) manual page by Tom Rhodes
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.\" and includes modifications as appropriate.
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.\" The original header is included below:
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.\"
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.\" 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 November 27, 2006
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.Dt NEWSYSLOG.CONF 5
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.Os
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.Sh NAME
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.Nm newsyslog.conf
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.Nd
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.Xr newsyslog 8
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configuration file
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.Sh DESCRIPTION
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The
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.Nm
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file is used to set log file rotation configuration for the
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.Xr newsyslog 8
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utility.
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Configuration may designate that logs are rotated based on
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size, last rotation time, or time of day.
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The
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.Nm
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file can also be used to designate secure permissions to log
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files at rotation time.
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During initialization,
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.Xr newsyslog 8
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reads a configuration file,
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normally
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.Pa /etc/newsyslog.conf ,
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to determine which logs may potentially be rotated and archived.
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Each line has five mandatory fields and four optional fields,
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separated with whitespace.
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Blank lines or lines beginning with
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.Ql #
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are ignored.
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If
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.Ql #
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is placed in the middle of the line, the
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.Ql #
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character and the rest of the line after it is ignored.
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To prevent special meaning, the
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.Ql #
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character may be escaped with
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.Ql \e ;
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in this case preceding
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.Ql \e
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is removed and
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.Ql #
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is treated as an ordinary character.
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The fields of the configuration file are as follows:
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.Bl -tag -width indent
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.It Ar logfile_name
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Name of the system log file to be archived, or the literal string
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.Dq Aq Li default .
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The special default entry will only be used if a log file
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name is given as a command line argument to
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.Xr newsyslog 8 ,
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and if that log file name is not matched by any other
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line in the configuration file.
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.It Ar owner : Ns Ar group
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This optional field specifies the owner and group for the archive file.
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The
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.Ql \&:
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is essential regardless 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 or contains a value.
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The field may be numeric, or a name which is 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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Specify the file mode of the log file and archives.
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.It Ar count
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Specify the maximum number of archive files which may exist.
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This does not consider the current log file.
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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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in kilobytes, the log file will be trimmed as described above.
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If this field contains an asterisk
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.Pq Ql * ,
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the log file will not be trimmed based on size.
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.It Ar when
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The
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.Ar when
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field may consist of an interval, a specific time, or both.
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If the
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.Ar when
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field contains an asterisk
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.Pq Ql * ,
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log rotation will solely depend on the contents of the
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.Ar size
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field.
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Otherwise, the
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.Ar when
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field consists of an optional interval in hours, usually followed
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by an
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.So Li \&@ Sc Ns No -sign
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and a time in restricted
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.Tn ISO 8601
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format.
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Additionally, the format may also be constructed with a
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.Ql $
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sign along with a rotation time specification of once
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a day, once a week, or once a month.
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.Pp
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If a time is specified, the log file will only be trimmed if
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.Xr newsyslog 8
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is run within one hour of the specified time.
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If an interval is specified, the log file will be trimmed if that many
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hours have passed since the last rotation.
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When both a time and an interval are
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specified then both conditions must be satisfied for the rotation to
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take place.
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.Pp
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There is no provision for the specification of a timezone.
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There is little point in specifying an explicit minutes or
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seconds component in the current implementation, since the only comparison is
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.Dq within the hour .
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.Pp
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.Sy ISO 8601 restricted time format :
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.Pp
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The lead-in character for a restricted
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.Tn ISO 8601
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time is an
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.Ql @
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sign.
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The particular format of the time in restricted
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.Tn ISO 8601
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is:
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.Sm off
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.Oo
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.Op Oo Oo Oo Va cc Oc Va yy Oc Va mm Oc Va dd
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.Oo
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.Li T
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.Op Va hh Oo Va mm Oo Va ss Oc Oc Oc
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.Oc .
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.Sm on
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Optional date fields default to the appropriate component of the
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current date; optional time fields default to midnight; hence if today
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is January 22, 1999, the following date specifications are all
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equivalent:
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.Pp
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.Bl -item -compact -offset indent
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.It
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.Sq Li 19990122T000000
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.It
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.Sq Li 990122T000000
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.It
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.Sq Li 0122T000000
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.It
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.Sq Li 22T000000
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.It
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.Sq Li T000000
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.It
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.Sq Li T0000
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.It
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.Sq Li T00
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.It
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.Sq Li 22T
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.It
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.Sq Li T
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.It
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.Sq Li \&
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.El
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.Pp
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.Sy Day, week, and month time format:
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.Pp
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The lead-in character for day, week, and month specification is a
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.Ql $
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sign.
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The particular format of day, week, and month specification is:
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.Op Li D Ns Va hh ,
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.Op Li W Ns Va w Ns Op Li D Ns Va hh ,
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and
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.Op Li M Ns Va dd Ns Op Li D Ns Va hh ,
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respectively.
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Optional time fields default to midnight.
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The ranges for day and hour specifications are:
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.Pp
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.Bl -tag -width indent -offset indent -compact
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.It Ar hh
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hours, range 0..23
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.It Ar w
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day of week, range 0..6, 0 = Sunday
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.It Ar dd
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day of month, range 1..31, or one of the letters
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.Ql L
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or
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.Ql l
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to specify the last day of the month.
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.El
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.Pp
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Some examples:
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.Pp
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.Bl -tag -width indent -offset indent -compact
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.It Li $D0
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rotate every night at midnight
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(same as
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.Li @T00 )
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.It Li $D23
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rotate every day at 23:00
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(same as
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.Li @T23 )
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.It Li $W0D23
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rotate every week on Sunday at 23:00
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.It Li $W5D16
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rotate every week on Friday at 16:00
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.It Li $M1D0
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rotate at the first day of every month at midnight
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(i.e., the start of the day; same as
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.Li @01T00 )
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.It Li $M5D6
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rotate on every 5th day of month at 6:00
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(same as
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.Li @05T06 )
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.El
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.It Ar flags
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This optional field is made up of one or more characters
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that specify any special processing to be done for the log
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files matched by this line.
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The following are valid flags:
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.Bl -tag -width indent
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.It Cm B
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indicates that the log file is a binary file, or has some
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special format.
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Usually
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.Xr newsyslog 8
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inserts an
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.Tn ASCII
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message into a log file during rotation.
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This message is used to indicate
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when, and sometimes why the log file was rotated.
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If
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.Cm B
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is specified, then that informational message will not be
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inserted into the log file.
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.It Cm C
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indicates that the log file should be created if it does not
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already exist, and if the
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.Fl C
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option was also specified on the command line.
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.It Cm D
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indicates that
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.Xr newsyslog 8
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should set the
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.Dv UF_NODUMP
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flag when creating a new version of
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this log file.
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This option would affect how the
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.Xr dump 8
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command treats the log file when making a file system backup.
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.It Cm G
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indicates that the specified
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.Ar logfile_name
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is a shell pattern, and that
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.Xr newsyslog 8
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should archive all filenames matching that pattern using the
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other options on this line.
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See
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.Xr glob 3
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for details on syntax and matching rules.
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.It Cm J
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indicates that
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.Xr newsyslog 8
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should attempt to save disk space by compressing the rotated
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log file using
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.Xr bzip2 1 .
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.It Cm N
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indicates that there is no process which needs to be signaled
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when this log file is rotated.
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.It Cm U
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indicates that the file specified by
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.Ar path_to_pid_file
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will contain the ID for a process group instead of a process.
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This option also requires that the first line in that file
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be a negative value to distinguish it from a process ID.
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.It Cm Z
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indicates that
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.Xr newsyslog 8
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should attempt to save disk space by compressing the rotated
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log file using
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.Xr gzip 1 .
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.It Fl
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a minus sign will not cause any special processing, but it
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can be used as a placeholder to create a
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.Ar flags
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field when you need to specify any of the following fields.
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.El
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.It Ar path_to_pid_file
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This optional field specifies the file name containing a daemon's
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process ID or to find a group process ID if the
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.Cm U
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flag was specified.
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If this field is present, a
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.Ar signal_number
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is sent the process ID contained in this file.
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If this field is not present, then a
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.Dv SIGHUP
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signal will be sent to
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.Xr syslogd 8 ,
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unless the
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.Cm N
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flag has been specified.
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This field must start with
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.Ql /
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in order to be recognized properly.
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.It Ar signal_number
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This optional field specifies the signal number that will be sent
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to the daemon process (or to all processes in a process group, if the
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.Cm U
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flag was specified).
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If this field is not present, then a
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.Dv SIGHUP
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signal will be sent.
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.El
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.Sh SEE ALSO
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.Xr bzip2 1 ,
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.Xr gzip 1 ,
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.Xr syslog 3 ,
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.Xr chown 8 ,
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.Xr newsyslog 8 ,
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.Xr syslogd 8
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.Sh HISTORY
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This manual page first appeared in
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.Fx 4.10 .
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