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#!/usr/bin/env bash
#
# nagios-force-check(1) -- Force an immediate check of a nominated host or
# service.
#
# $ nfc <host>[/<service>]
#
# Author: Tom Ryder <tom@sanctum.geek.nz>
# Copyright: 2014 Sanctum
#
# Name self
self=nagios-force-check
# Usage printing function
usage() {
printf 'USAGE: %s [-n] <host[/service]>\n' "$self"
}
# Handle options, just -h help at the moment
OPTIND=1
while getopts 'h' opt ; do
case "$opt" in
h)
usage
exit 0
;;
'?')
usage >&2
exit 1
;;
esac
done
shift "$((OPTIND-1))"
# Bail if no arguments left; we need at least the host/service name
if ! (($#)) ; then
usage >&2
exit 1
fi
# Define relatively fixed/guaranteed fields for Nagios command; note that the
# comment has a default of 'no comment given'
now=$(date +%s)
spec=$1
cmdfile=${NAGCMD_FILE:-/usr/local/nagios/var/rw/nagios.cmd}
# If a service name is specified after a slash, figure that out
if [[ $spec == */* ]] ; then
host=${spec%/*}
service=${spec##*/}
else
host=$spec
service=
fi
# Write command and print message if it fails; succeed silently
declare -a cmds
if [[ $service ]] ; then
cmds=("${cmds[@]}" "$(printf '[%lu] SCHEDULE_FORCED_SVC_CHECK;%s;%s;%lu' \
"$now" "$host" "$service" "$now")")
else
cmds=("${cmds[@]}" "$(printf '[%lu] SCHEDULE_FORCED_HOST_CHECK;%s;%lu' \
"$now" "$host" "$now")")
cmds=("${cmds[@]}" "$(printf '[%lu] SCHEDULE_HOST_SVC_CHECKS;%s;%lu' \
"$now" "$host" "$now")")
fi
# Attempt to write command to file
for cmd in "${cmds[@]}" ; do
if ! printf '%s\n' "$cmd" >> "$cmdfile" ; then
printf '%s: Failed to write command to file\n' "$self" >&2
exit 1
fi
done
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