#!/usr/bin/sh
# -*- sh -*-

set -e

: << =cut

=head1 NAME

proc_pri - Munin-plugin to monitor the processes priority on a Linux
machine

=head1 CONFIGURATION

No configuration

=head1 AUTHOR

Lars Strand

=head1 LICENSE

GNU GPL

=head1 MAGIC MARKERS

 #%# family=auto
 #%# capabilities=autoconf

=cut

. "$MUNIN_LIBDIR/plugins/plugin.sh"

PS=$(command -v ps || true)
if [ "$1" = "autoconf" ]; then
	if ! [ -x "$PS" ]; then
		echo "no (command ps not found)"
		exit 0
	fi
	echo yes
	exit 0
fi

if [ "$1" = "config" ]; then
    echo 'graph_title Processes priority'
    echo 'graph_order low high locked'
    echo 'graph_category processes'
    echo 'graph_info This graph shows number of processes at each priority'
    echo 'graph_args --base 1000 -l 0'
    echo 'graph_vlabel Number of processes'
    echo 'high.label high priority'
    echo 'high.draw STACK'
    echo 'high.info The number of high-priority processes (tasks)'
    print_warning high
    print_critical high
    echo 'low.label low priority'
    echo 'low.draw AREA'
    echo 'low.info The number of low-priority processes (tasks)'
    print_warning low
    print_critical low
    echo 'locked.label locked in memory'
    echo 'locked.draw STACK'
    echo 'locked.info The number of processes that have pages locked into memory (for real-time and custom IO)'
    print_warning locked
    print_critical locked
    exit 0
fi

echo -n "high.value "
"$PS" --no-header -eo stat | grep \< | wc -l
echo -n "low.value "
"$PS" --no-header -eo stat | grep N | wc -l
echo -n "locked.value "
"$PS" --no-header -eo stat | grep L | wc -l