#!@@GOODSH@@
# -*- sh -*-

: << =cut

=head1 NAME

ps_ - Wildcard plugin to monitor number of processes

=head1 CONFIGURATION

This is a wildcard plugin.  The wildcard prefix link name should be the process
name to monitor.

This plugin uses the following configuration variables:

 [ps_*]
  env.regex - Regular expression used to filter output from pgrep / ps.

Whatever matches this regular expression is included in the count.

=head2 DEFAULT CONFIGURATION

The default configuration is to set "env.regex" to the link name prefix.

=head2 EXAMPLE WILDCARD USAGE

C<ln -s /usr/share/munin/node/plugins-auto/ps_ /etc/munin/node.d/ps_exim>

...will monitor number of exim-processes.

=head1 AUTHOR

Unknown author

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

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

=cut

. $MUNIN_LIBDIR/plugins/plugin.sh

myname=`basename $0 | sed 's/^ps_//g'`

name="${name-\<$myname\>}"
REGEX="${regex-\<$name\>}"

if [ "$1" = "autoconf" ]; then
    # Makes little sense to autoconf if you can't suggest
    echo no
    exit 0
fi

if [ "$1" = "suggest" ]; then
	exit 0
fi

if [ "$1" = "config" ]; then

	echo graph_title Number of $myname processes
	echo 'graph_args --base 1000 --vertical-label processes -l 0'
	echo 'graph_category processes'
	echo "count.label $myname"
	print_warning count
	print_critical count
	exit 0
fi

printf "count.value "

PGREP=/usr/bin/pgrep

if [ -x "$PGREP" ]; then
	$PGREP -f -l "$name" | grep "$REGEX" | grep -v grep | wc -l
elif [ -x /usr/ucb/ps ]; then
	# Solaris without pgrep. How old is that?
	/usr/ucb/ps auxwww | grep "$REGEX" | grep -v grep | wc -l
else
	ps auxwww | grep "$REGEX" | grep -v grep | wc -l
fi
