Incorporate some ideas that came up during discussion with msmith.
This commit is contained in:
Paul Traina
parent
1e3d7510d3
commit
fb1485d3e3
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=28143
@ -22,7 +22,7 @@
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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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.\" $Id$
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.\" $Id: periodic.8,v 1.1.1.1 1997/08/12 17:48:49 pst Exp $
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.\"
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.Dt periodic 8
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.Os FreeBSD 3.0
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@ -31,52 +31,69 @@
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.Nd run periodic system functions
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.Sh SYNOPSIS
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.Nm periodic
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.Ar path-to-directory
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.Ao
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.Cm daily | weekly | monthly |
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.Ar path Op path ...
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.Ac
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.Sh DESCRIPTION
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The
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.Nm
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program is intended to be called by cron(8) to execute shell scripts
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located in the specified directory.
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.Pp
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The arguments are as follows:
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One, and only one, of the following arguments should be specified:
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.Bl -tag -width Fl
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.It Cm 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 Cm weekly
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Perform the standard weekly periodic executable run.
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This usually occurs on Sunday mornings.
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.It Cm 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 Ar path
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The
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.Ar path
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is a required argument. This is a path to a directory containing
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executable programs or shell scripts which are executed one by one
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in alphanumeric order.
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An absolute path to a directory containing a set of executables to be run.
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.El
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.Pp
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The
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.Nm
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program will run each executable file in the directory or directories
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specified. If a file does not have the executable bit set, it will be
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ignored silently.
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.Sh ENVIRONMENT
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The
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.Nm
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command sets the
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.Ev PATH
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environment to include all standard system
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directories. If entries are added, each entry
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must be responsible for configuring the appropriate environment.
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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 /etc/cron.d/monthly
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.Bl -tag -width /etc/crontab
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.It Pa /etc/crontab
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The
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.Nm
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program is typically called via entries in the system default cron table.
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.It Pa /etc/cron.d
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The default top-level directory where periodic script directories reside.
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If a simple name, rather than a complete path, is specified on the command
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line, this directory is checked for the corresponding argument.
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.It Pa /etc/cron.d/daily
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The default directory where script fragments that should be executed once
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a day (usually in the middle of the night) are placed.
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.It Pa /etc/cron.d/weekly
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The default directory where script fragments that should be executed once
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a eek (usually on a weekend night) are placed.
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.It Pa /etc/cron.d/monthly
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The default directory where script fragments that should be executed once
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a month (usually on the first day of the month) are placed.
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.It Pa <entry>
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Each file in the specified directory is checked for executability. If
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the execute bit is set, the entry is run.
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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/rc.conf
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The
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.Pa rc.conf
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system registry contains a variable
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.Va local_cron
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which may be configured to specify additional top level standard
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periodic directories, such as
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.Pa /usr/local/etc/cron.d
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and
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.Pa /usr/X11R6/etc/cron.d .
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.El
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.Sh EXAMPLES
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The system crontab should have entries for
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@ -87,9 +104,15 @@ similar to the following example:
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.Dl 0 2 * * * root periodic daily 2>&1
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.Dl 0 3 * * 6 root periodic weekly 2>&1
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.Dl 0 5 1 * * root periodic monthly 2>&1
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.Pp
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Additionally, the system registry will typically have a
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.Va local_cron
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variable reading:
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.Dl local_cron="/usr/local/etc/cron.d /usr/X11R6/etc/cron.d" # cron script dirs.
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.Sh SEE ALSO
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.Xr cron 8
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.Xr crontab 5 ,
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.Xr rc.conf 5 ,
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.Xr sh 1 ,
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.Rs
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.Sh DIAGNOSTICS
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@ -1,6 +1,6 @@
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#!/bin/sh -
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#
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# $Id$
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# $Id: periodic.sh,v 1.1.1.1 1997/08/12 17:48:49 pst Exp $
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#
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# Run nightly periodic scripts
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#
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@ -8,44 +8,80 @@
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# periodic /absolute/path/to/directory - run periodic scripts in dir
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#
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if [ $# -lt 1 ] ; then
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usage () {
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echo "usage: $0 <directory of files to execute>" 1>&2
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echo "or $0 { daily | weekly | monthly }" 1>&2
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exit 1
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}
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if [ $# -lt 1 ] ; then
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usage
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fi
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# If possible, check /etc/rc.conf to see if there are additional dirs to check
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if [ -r /etc/rc.conf ] ; then
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. /etc/rc.conf
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fi
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dir=$1
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run=`basename $dir`
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# If a full path was not specified, assume default cron area
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# If a full path was not specified, check the standard cron areas
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if [ "$dir" = "$run" ] ; then
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dir="/etc/cron.d/$dir"
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fi
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dirlist=""
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for top in /etc/cron.d ${local_cron} ; do
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if [ -d $top/$dir ] ; then
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dirlist="${dirlist} $top/$dir"
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fi
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done
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if [ ! -d $dir ] ; then
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( echo "$0: $dir not found"
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echo ""
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echo "usage: $0 <directory of files to execute>"
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) 1>&2
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exit 1
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fi
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# User wants us to run stuff in a particular directory
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else
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for dir in $* ; do
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if [ ! -d $dir ] ; then
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echo "$0: $dir not found" 1>&2
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exit 1
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fi
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done
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# Check and see if there is work to be done, if not, exit silently
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# this is not an error condition.
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if [ "`basename $dir/*`" = "*" ] ; then
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exit 0
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dirlist="$*"
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fi
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host=`hostname -s`
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echo "Subject: $host $run run output"
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# Execute each executable file in the directory. If the x bit is not
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# Execute each executable file in the directory list. If the x bit is not
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# set, assume the user didn't really want us to muck with it (it's a
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# README file or has been disabled).
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for file in $dir/* ; do
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if [ -x $file ] ; then
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$file
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fi
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done
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# We can't run scripts in order if we don't have sort and sed, which
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# might not be present on an embedded system.
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if [ -x /usr/bin/sort -a -x /usr/bin/sed ] ; then
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# Sort files in ascending alphanumeric order based on their basename
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# across all directories. XXX scripts better not have ':' in their names!
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for file in `(
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for dir in $dirlist ; do
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for file in $dir/* ; do
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echo $file | sed -e 's;\(.*\)/\([^/]*$\);\2:\1;'
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done
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done
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) | sort | sed -e 's; *\([^:]*\):\([^ ]*\);\2/\1 ;g' `; do
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if [ -x $file ] ; then
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$file
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fi
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done
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else
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# Just run scripts in order in each directory.
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for dir in $dirlist ; do
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for file in $dir/* ; do
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if [ -x $file ] ; then
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$file
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fi
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done
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done
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fi
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