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service monitor
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| #!/usr/local/bin/bash | |
| if test $# -ne 1; then | |
| echo 'Wrong arguments!'; exit 1; fi | |
| SERVICE_NAME="$1" | |
| if test -z "${SERVICE_NAME}"; then | |
| echo "Service name \"${SERVICE_NAME}\" is empty!"; exit 1; fi | |
| if [[ ! -s "/etc/systemd/system/${SERVICE_NAME}.service" ]]; then | |
| echo "No service \"${SERVICE_NAME}\"!"; exit 1; fi | |
| SENDER_NAME='org.freedesktop.systemd1' | |
| SENDER_TYPE='signal' | |
| SENDER_MEMBER='PropertiesChanged' | |
| ESCAPED_NAME="${SERVICE_NAME}.service" | |
| ESCAPED_NAME="${ESCAPED_NAME//_/_5f}" | |
| ESCAPED_NAME="${ESCAPED_NAME//./_2e}" | |
| ESCAPED_NAME="${ESCAPED_NAME//@/_40}" | |
| ESCAPED_NAME="${ESCAPED_NAME//-/_2d}" | |
| SENDER_PATH="/org/freedesktop/systemd1/unit/${ESCAPED_NAME}" | |
| SENDER_MATCHER="type='${SENDER_TYPE}',sender='${SENDER_NAME}',path='${SENDER_PATH}',member='${SENDER_MEMBER}'" | |
| IP_ADDRESS="$(hostname -i)" | |
| LAST_ACTIVE_STATE=$(systemctl show "${SERVICE_NAME}.service" -p ActiveState --value) | |
| LAST_SUB_STATE=$(systemctl show "${SERVICE_NAME}.service" -p SubState --value) | |
| LAST_TIMESTAMP_MICROSECONDS=$(date +%s)000000 | |
| while read -r json; do | |
| [[ "${json}" == *ActiveState* || "${json}" == *SubState* ]] || continue | |
| [[ "${json}" != *"${SENDER_PATH}"* ]] && continue | |
| CURRENT_PATH="$(echo "${json}" | yq -re '.path // ""' 2>/dev/null)" || continue | |
| [[ "${CURRENT_PATH}" == "${SENDER_PATH}" ]] || continue | |
| # | |
| TIMESTAMP_MICROSECONDS="$(echo "${json}" | yq -e '.payload.data[1].StateChangeTimestamp.data // -1' 2>/dev/null)" || continue | |
| [[ "${TIMESTAMP_MICROSECONDS}" =~ ^[1-9][0-9]+$ ]] || continue | |
| [[ $TIMESTAMP_MICROSECONDS -le $LAST_TIMESTAMP_MICROSECONDS ]] && continue | |
| TIMESTAMP_SECONDS=$(( TIMESTAMP_MICROSECONDS / 1000000 )) | |
| MILLISECONDS=$(( TIMESTAMP_MICROSECONDS % 1000000 / 1000 )) | |
| DATE_TIME="$(TZ='utc' LC_ALL=C date -d "@$TIMESTAMP_SECONDS" +'%Y/%m/%d %H:%M:%S').$(printf '%03d' "${MILLISECONDS}")" | |
| # | |
| if [[ "${json}" == *ActiveState* ]]; then | |
| ACTIVE_STATE="$(echo "${json}" | yq -e '.payload.data[1].ActiveState.data // ""' 2>/dev/null)" || continue | |
| [[ -z "${ACTIVE_STATE}" ]] && continue | |
| [[ "${LAST_ACTIVE_STATE}" == "${ACTIVE_STATE}" ]] && continue | |
| LAST_ACTIVE_STATE="${ACTIVE_STATE}" | |
| SUB_STATE="$(echo "${json}" | yq -e '.payload.data[1].SubState.data // ""' 2>/dev/null)" | |
| [[ -n "${SUB_STATE}" && "${LAST_SUB_STATE}" != "${SUB_STATE}" ]] && LAST_SUB_STATE="${SUB_STATE}" | |
| elif [[ "${json}" == *SubState* ]]; then | |
| SUB_STATE="$(echo "${json}" | yq -e '.payload.data[1].SubState.data // ""' 2>/dev/null)" || continue | |
| [[ -z "${SUB_STATE}" ]] && continue | |
| [[ "${LAST_SUB_STATE}" == "${SUB_STATE}" ]] && continue | |
| LAST_SUB_STATE="${SUB_STATE}" | |
| ACTIVE_STATE="$(echo "${json}" | yq -e '.payload.data[1].ActiveState.data // ""' 2>/dev/null)" | |
| [[ -n "${ACTIVE_STATE}" && "${LAST_ACTIVE_STATE}" != "${ACTIVE_STATE}" ]] && LAST_ACTIVE_STATE="${ACTIVE_STATE}" | |
| else continue; fi | |
| MESSAGE=" | |
| UTC: \`${DATE_TIME}\` | |
| IP: \`${IP_ADDRESS}\` | |
| Service: \`${SERVICE_NAME}\` | |
| ActiveState: \`${LAST_ACTIVE_STATE}\` | |
| SubState: \`${LAST_SUB_STATE}\`" | |
| /usr/local/bin/send_message.sh "${MESSAGE}" & | |
| done < <(stdbuf -oL busctl monitor "${SENDER_NAME}" --match="${SENDER_MATCHER}" --json=short) |
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