#!/bin/bash

. $MUNIN_LIBDIR/plugins/plugin.sh

case $1 in
    config)
	GRAPH_ORDER=""
	COUNTER=1
	while [ $COUNTER -gt 0 ]; do
	    FILE_PATH="file${COUNTER}_path"

	    # Is the path for this file specified?
	    eval FILE=\$$FILE_PATH
	    if [ "$FILE" == "" ]; then
		break;
	    fi

	    # It is! Add it to the graphs.
	    GRAPH_ORDER="$GRAPH_ORDER file_$COUNTER"

	    # Does this file have a specified label?
	    LABEL_COUNTER="file${COUNTER}_label"
	    eval LABEL=\$$LABEL_COUNTER
	    if [ "$LABEL" == "" ]; then
		LABEL=`basename $FILE`
	    fi

	    # Associated warning level?
	    WARNING="file${COUNTER}_warning"
	    eval WARNING=\$$WARNING
	    if [ "$WARNING" != "" ]; then
		echo "file_$COUNTER.warning $WARNING"
	    fi

	    # Associated critical level?
	    CRITICAL="file${COUNTER}_critical"
	    eval CRITICAL=\$$CRITICAL
	    if [ "$CRITICAL" != "" ]; then
		echo "file_$COUNTER.critical $CRITICAL"
	    fi

	    echo "file_$COUNTER.label $LABEL"
	    echo "file_$COUNTER.type GAUGE"
	    echo "file_$COUNTER.min 0"
	    let COUNTER=COUNTER+1
	done;

	echo "graph_order $GRAPH_ORDER"
	echo "graph_title File age"
	echo 'graph_args --base 1000 -l 0'
	echo 'graph_vlabel seconds'
	echo 'graph_category disk'

	exit 0
	;;
esac


COUNTER=1
while [ $COUNTER -gt 0 ]; do
    FILE_COUNTER="file${COUNTER}_path"
    eval FILE=\$$FILE_COUNTER
    if [ "$FILE" == "" ]; then
	break;
    fi

    # If the file isn't readable, say it's zero.
    if [ ! -r "$FILE" ]; then
	VALUE=0
    else
        VALUE=$(($(date +%s) - $(stat -c '%Y' "$FILE")))
    fi

    echo "file_$COUNTER.value $VALUE"
    let COUNTER=COUNTER+1
done;
exit

# -*- sh -*-

: << =cut

=head1 NAME

file_age - Monitors the age of files.

=head1 CONFIGURATION

Since there is no way for the plugin to guess which files you want monitored, you're going to have to set each file up separately. Put the following in a file in your plugin-conf.d directory.

    [file_age]
    user root						# May not be necessary, depending on which files you want monitored.

    env.file1_path		/var/log/syslog		# Mandatory, complete path to file.
    env.file1_label		System syslog		# Optional label if you don't want the file name to be displayed.
    env.file1_warning		86400			# Optional warning level. Measured in seconds. 86400 is one day of seconds.
    env.file1_critical		864000			# Optional critical level. Measured in seconds.

Continue with file2, file3, etc...

Here, have some seconds:

    3600	One hour
    7300	Two hours
    10800	Three hours
    21600	Six hours
    43200	Twelve hours
    86400	One day
    172800	Two days
    259200	Three days
    604800	One week

=head1 AUTHOR

Edward Plainview <it@sverigedemokraterna.se>

=head1 DONATIONS

If you wish to donate money for this plugin, please read https://it.sverigedemokraterna.se/donera/

=head1 LICENSE

GPLv3

=head1 MAGIC MARKERS

 #%# family=auto

=head1 VERSION

1.0 released 2012-02-26

=cut