aa12cea2cc
Although groff_mdoc(7) gives another impression, this is the ordering most widely used and also required by mdocml/mandoc. Reviewed by: ru Approved by: philip, ed (mentors)
259 lines
7.1 KiB
Groff
259 lines
7.1 KiB
Groff
.\" Copyright (c) 1997 FreeBSD, Inc.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 30, 2007
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.Dt PERIODIC 8
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.Os
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.Sh NAME
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.Nm periodic
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.Nd run periodic system functions
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.Sh SYNOPSIS
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.Nm
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.Ar directory ...
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.Sh DESCRIPTION
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The
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.Nm
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utility is intended to be called by
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.Xr cron 8
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to execute shell scripts
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located in the specified directory.
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.Pp
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One or more of the following arguments must be specified:
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.Bl -tag -width ".Pa monthly"
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.It Pa daily
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Perform the standard daily periodic executable run.
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This usually occurs early in the morning (local time).
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.It Pa weekly
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Perform the standard weekly periodic executable run.
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This usually occurs very early on Saturday mornings.
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.It Pa monthly
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Perform the standard monthly periodic executable run.
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This usually occurs on the first day of the month.
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.It Pa security
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Perform the standard daily security checks.
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This is usually spawned by the
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.Pa daily
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run.
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.It Ar path
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An arbitrary directory containing a set of executables to be run.
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.El
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.Pp
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If an argument is an absolute directory name it is used as is, otherwise
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it is searched for under
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.Pa /etc/periodic
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and any other directories specified by the
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.Va local_periodic
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setting in
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.Xr periodic.conf 5
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(see below).
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.Pp
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The
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.Nm
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utility will run each executable file in the directory or directories
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specified.
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If a file does not have the executable bit set, it is silently ignored.
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.Pp
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Each script is required to exit with one of the following values:
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.Bl -tag -width 4n
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.It 0
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The script has produced nothing notable in its output.
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The
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.Ao Ar basedir Ac Ns Va _show_success
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variable controls the masking of this output.
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.It 1
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The script has produced some notable information in its output.
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The
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.Ao Ar basedir Ac Ns Va _show_info
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variable controls the masking of this output.
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.It 2
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The script has produced some warnings due to invalid configuration settings.
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The
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.Ao Ar basedir Ac Ns Va _show_badconfig
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variable controls the masking of this output.
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.It >2
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The script has produced output that must not be masked.
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.El
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.Pp
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If the relevant variable (where
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.Aq Ar basedir
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is the base directory in which the script resides) is set to
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.Dq Li NO
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in
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.Pa periodic.conf ,
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.Nm
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will mask the script output.
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If the variable is not set to either
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.Dq Li YES
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or
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.Dq Li NO ,
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it will be given a default value as described in
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.Xr periodic.conf 5 .
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.Pp
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All remaining script output is delivered based on the value of the
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.Ao Ar basedir Ac Ns Va _output
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setting.
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.Pp
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If this is set to a path name (beginning with a
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.Ql /
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character), output is simply logged to that file.
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.Xr newsyslog 8
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knows about the files
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.Pa /var/log/daily.log , /var/log/weekly.log
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and
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.Pa /var/log/monthly.log ,
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and if they exist, it will rotate them at the appropriate times.
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These are therefore good values if you wish to log
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.Nm
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output.
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.Pp
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If the
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.Ao Ar basedir Ac Ns Va _output
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value does not begin with a
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.Ql /
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and is not empty, it is assumed to contain a list of email addresses, and
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the output is mailed to them.
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If
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.Ao Ar basedir Ac Ns Va _show_empty_output
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is set to
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.Dq Li NO ,
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then no mail will be sent if the output was empty.
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.Pp
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If
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.Ao Ar basedir Ac Ns Va _output
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is not set or is empty, output is sent to standard output.
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.Sh ENVIRONMENT
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The
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.Nm
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utility sets the
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.Ev PATH
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environment to include all standard system directories, but no additional
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directories, such as
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.Pa /usr/local/bin .
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If executables are added which depend upon other path components, each
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executable must be responsible for configuring its own appropriate environment.
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.Sh FILES
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.Bl -tag -width ".Pa /etc/defaults/periodic.conf"
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.It Pa /etc/crontab
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the
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.Nm
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utility is typically called via entries in the system default
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.Xr cron 8
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table
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.It Pa /etc/periodic
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the top level directory containing
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.Pa daily ,
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.Pa weekly ,
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and
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.Pa monthly
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subdirectories which contain standard system periodic executables
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.It Pa /etc/defaults/periodic.conf
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the
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.Pa periodic.conf
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system registry contains variables that control the behaviour of
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.Nm
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and the standard
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.Pa daily , weekly ,
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and
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.Pa monthly
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scripts
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.It Pa /etc/periodic.conf
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this file contains local overrides for the default
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.Nm
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configuration
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.El
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.Sh EXIT STATUS
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Exit status is 0 on success and 1 if the command fails.
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.Sh EXAMPLES
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The system crontab should have entries for
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.Nm
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similar to the following example:
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.Bd -literal -offset indent
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# do daily/weekly/monthly maintenance
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0 2 * * * root periodic daily
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0 3 * * 6 root periodic weekly
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0 5 1 * * root periodic monthly
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.Ed
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.Pp
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The
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.Pa /etc/defaults/periodic.conf
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system registry will typically have a
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.Va local_periodic
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variable reading:
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.Pp
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.Dl local_periodic="/usr/local/etc/periodic"
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.Pp
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To log
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.Nm
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output instead of receiving it as email, add the following lines to
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.Pa /etc/periodic.conf :
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.Bd -literal -offset indent
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daily_output=/var/log/daily.log
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weekly_output=/var/log/weekly.log
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monthly_output=/var/log/monthly.log
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.Ed
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.Pp
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To only see important information from daily periodic jobs, add the
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following lines to
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.Pa /etc/periodic.conf :
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.Bd -literal -offset indent
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daily_show_success=NO
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daily_show_info=NO
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daily_show_badconfig=NO
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.Ed
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.Sh DIAGNOSTICS
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The command may fail for one of the following reasons:
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.Bl -diag
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.It usage: periodic <directory of files to execute>
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No directory path argument was passed to
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.Nm
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to specify where the script fragments reside.
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.It <directory> not found
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Self explanatory.
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.El
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.Sh SEE ALSO
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.Xr sh 1 ,
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.Xr crontab 5 ,
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.Xr periodic.conf 5 ,
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.Xr cron 8 ,
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.Xr newsyslog 8
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Fx 3.0 .
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.Sh AUTHORS
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.An Paul Traina Aq pst@FreeBSD.org
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.An Brian Somers Aq brian@Awfulhak.org
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.Sh BUGS
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Since one specifies information about a directory using shell
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variables containing the string,
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.Aq Ar basedir ,
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.Aq Ar basedir
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must only contain characters that are valid within a
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.Xr sh 1
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variable name, alphanumerics and underscores, and the first character
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may not be numeric.
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