system-helpers/usr/local/bin/systemd_failure_notify
Alexander Schäferdiek 71977c9dca
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Fail properly in all scripts when required commands are not available
2023-01-25 09:42:22 +01:00

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2.7 KiB
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Executable file

#!/usr/bin/env bash
# usage
usage() {
USAGE=$(cat <<EOF
Usage: systemd_failure_notify [CONFIG_FILE (absolute path)] <service>
Sends out notifications for failed services. Please see man systemd_failure_notify.
EOF
)
echo "$USAGE";
}
set -e;
SYSTEMD_FAILURE_NOTFY_SERVICE=$1
if [ -z "$SYSTEMD_FAILURE_NOTFY_SERVICE" ]; then
echo "No service given";
echo "";
usage;
exit 1;
fi
SYSTEMD_FAILURE_NOTFY_HOSTNAME=$(hostname)
SYSTEMD_FAILURE_NOTFY_USER=$(whoami)
SYSTEMD_FAILURE_NOTIFY_MAIL_ENABLED="true";
SYSTEMD_FAILURE_NOTIFY_MAIL_ADDRESS="";
SYSTEMD_FAILURE_NOTIFY_GOTIFY_ENABLED="false";
# check for config file
apply_config() {
local config=$1;
if [[ ! -f "$config" ]]; then
echo "No config file specified";
echo "";
usage;
exit 1;
fi
set -a;
# shellcheck disable=SC1090
source "$config";
set +a;
}
check_requirements() {
local mailEnabled=$1;
local gotifyEnabled=$2;
if [[ "${mailEnabled}" == "true" ]]; then
type mailx &> /dev/null || { echo "Requiring 'mailx' but it's not installed"; exit 1; }
fi
if [[ "${gotifyEnabled}" == "true" ]]; then
type gotify &> /dev/null || { echo "Requiring 'gotify' but it's not installed"; exit 1; }
fi
type whoami &> /dev/null || { echo "Requiring 'whoami' but it's not installed"; exit 1; }
}
source_config() {
local config=$1;
local configFallback=$2;
local configGlobalFallback=$3;
if [[ -f "$config" ]]; then
apply_config "$config";
return;
fi
if [[ -f "$configFallback" ]]; then
apply_config "$configFallback";
return;
fi
if [[ -f "$configGlobalFallback" ]]; then
apply_config "$configGlobalFallback";
return;
fi
}
source_config "$2" "$HOME/.systemd_failure_notify.conf" "/etc/systemd_failure_notify.conf"
check_requirements "$SYSTEMD_FAILURE_NOTIFY_MAIL_ENABLED" "$SYSTEMD_FAILURE_NOTIFY_GOTIFY_ENABLED"
SUBJECT="[systemd $SYSTEMD_FAILURE_NOTFY_HOSTNAME for $SYSTEMD_FAILURE_NOTFY_USER] $SYSTEMD_FAILURE_NOTFY_SERVICE RUN FAILED"
MESSAGE="$SYSTEMD_FAILURE_NOTFY_SERVICE run failed"
if [[ "${SYSTEMD_FAILURE_NOTIFY_MAIL_ENABLED}" == "true" ]]; then
echo "$MESSAGE"|mailx -Ssendwait -s "$SUBJECT" "$SYSTEMD_FAILURE_NOTIFY_MAIL_ADDRESS";
echo "Sent notifiction via mail"
else
echo "Sending notifictions via mail is disabled"
fi
if [[ "${SYSTEMD_FAILURE_NOTIFY_GOTIFY_ENABLED}" == "true" ]]; then
if [[ ! -f "${HOME}/.config/gotify/cli.json" && ! -f "${HOME}/gotify/cli.json" && ! -f "./cli.json" && ! -f "/etc/gotify/cli.json" ]]; then
echo "Cannot find a valid cli.json, please run 'gotify init' before using this"
exit 1;
fi
echo "$MESSAGE"|gotify push --quiet --title "${SUBJECT}";
echo "Sent message via gotify"
else
echo "Sending notifictions via gotify is disabled"
fi