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#!/usr/bin/env bash
#
# nagios-force-check(1) -- Force an immediate check of a nominated host or
# service.
#
# $ nac <host>[/<service>]
#
#
# Author: Tom Ryder <tom@sanctum.geek.nz>
# Copyright: 2016
#
# Name self
self=nagios-force-check
# Usage printing function
usage() {
printf 'USAGE: %s (-a | <host[/service]> [<host[/service]..])\n' "$self"
}
# Handle options, just -h help at the moment
OPTIND=1
check_all_problems=0
while getopts 'ah' opt ; do
case "$opt" in
a)
check_all_problems=1
;;
h)
usage
exit 0
;;
'?')
usage >&2
exit 1
;;
esac
done
shift "$((OPTIND-1))"
# Bail if -a was selected but there are more arguments
if ((check_all_problems)) && (($#)) ; then
usage >&2
exit 1
# Bail if -a wasn't selected and there are no arguments
elif ! ((check_all_problems)) && ! (($#)) ; then
usage >&2
exit 1
fi
# Define relatively fixed/guaranteed fields for Nagios command; note that the
# comment has a default of 'no comment given'
now=$(date +%s)
cmdfile=${NAGCMD_FILE:-/usr/local/nagios/var/rw/nagios.cmd}
# Specs are either arguments or all unhandled problems
declare -a specs
if ((check_all_problems)) ; then
while read -r object ; do
specs=("${specs[@]}" "$object")
done < <(nagios-problem-list)
else
specs=("$@")
fi
# Iterate through the specs given and run the force recheck command
for spec in "${specs[@]}" ; do
# Check the host or service exists
if ! nagios-exists "$spec" ; then
printf '%s: Host/service %s does not seem to exist\n' \
"$self" "$spec" >&2
fi
# 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
cmds=()
if [[ $service ]] ; then
cmds=("${cmds[@]}" "$(printf '[%lu] SCHEDULE_SVC_CHECK;%s;%s;%lu' \
"$now" "$host" "$service" "$now")")
else
cmds=("${cmds[@]}" "$(printf '[%lu] SCHEDULE_HOST_CHECK;%s;%lu' \
"$now" "$host" "$now")")
cmds=("${cmds[@]}" "$(printf '[%lu] SCHEDULE_HOST_SVC_CHECKS;%s;%lu' \
"$now" "$host" "$now")")
fi
# Attempt to write commands to file
for cmd in "${cmds[@]}" ; do
if ! printf '%s\n' "$cmd" >> "$cmdfile" ; then
printf '%s: Failed to write command to file\n' "$self" >&2
exit 1
fi
done
done
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