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

: <<EOF

=head1 NAME

ntp_kernel_pll_freq - Plugin to monitor the kernel's PLL frequency for
the NTP status

=head1 CONFIGURATION

No configuration

This plugin optionally reads the file /etc/munin/ntp-freq-comp, which
should contain a number to be added to the frequency read by ntpdc.

=head1 AUTHORS

Unknown author

=head1 LICENSE

Unknown license

=head1 BUGS

Handling of $fcomp is unquoted, and may cause trouble.

=head1 MAGIC MARKERS

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

=cut

EOF

# $Id: ntp_kernel_pll_freq.in,v 1.1.1.1 2006/06/04 20:53:57 he Exp $

if [ "$1" = "autoconf" ]; then
    ntpdc -c kern 2>/dev/null | 
    awk 'BEGIN { ev=1; }
         /^pll frequency:/ { ev=0; } 
         END { if (ev == 0) { print "yes";} else { print "no"; } exit ev; }'
    exit 0
fi

if [ -f /etc/munin/ntp-freq-comp ]; then
    fcomp=`cat /etc/munin/ntp-freq-comp`
else
    fcomp=0
fi

if [ "$1" = "config" ]; then
    echo 'graph_title NTP kernel PLL frequency (ppm +' ${fcomp}')'
    echo 'graph_args --alt-autoscale'
    echo 'graph_vlabel PLL frequency (ppm +' ${fcomp}')'
    echo 'graph_category time'
    echo 'graph_info The frequency for the kernel phase-locked loop used by NTP'
    echo 'ntp_pll_freq.label pll-freq'
    echo 'ntp_pll_freq.info Phase-locked loop frequency in parts per million'
    exit 0
fi

echo -n 'ntp_pll_freq.value '
ntpdc -c kern | awk -v fcomp=$fcomp '/^pll frequency:/ { print $3 + fcomp }'