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

: <<EOF

=head1 NAME

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

=head1 CONFIGURATION

No configuration

=head1 AUTHORS

Original authors unknown
ntp_kernel_pll_freq script patched by azet@azet.org for frequency tolerance support

=head1 LICENSE

Unknown license

=head1 BUGS

None known

=head1 MAGIC MARKERS

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

=cut

EOF

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

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

echo -n 'ntp_pll_tol.value '
{ ntpq -c kerninfo; ntpdc -c kerninfo; } 2>/dev/null | awk '/^frequency tolerance:/ { print $3 }'