#!/bin/sh # # Send email to ZED_EMAIL in response to a DATA zevent. # Only one message per ZED_EMAIL_INTERVAL_SECS will be sent for a given # class/pool combination. This protects against spamming the recipient # should multiple events occur together in time for the same pool. # Exit codes: # 0: email sent # 1: email failed # 2: email suppressed # 3: missing executable # 4: unsupported event class # 5: internal error # State File Format: # POOL;TIME_OF_LAST_EMAIL # test -f "${ZED_ZEDLET_DIR}/zed.rc" && . "${ZED_ZEDLET_DIR}/zed.rc" test -n "${ZEVENT_POOL}" || exit 5 test -n "${ZEVENT_SUBCLASS}" || exit 5 if test "${ZEVENT_SUBCLASS}" != "data"; then \ logger -t "${ZED_SYSLOG_TAG:=zed}" \ -p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \ `basename "$0"`: unsupported event class \"${ZEVENT_SUBCLASS}\" exit 4 fi # Only send email if ZED_EMAIL has been configured. test -n "${ZED_EMAIL}" || exit 2 # Ensure requisite executables are installed. if ! command -v "${MAIL:=mail}" >/dev/null 2>&1; then logger -t "${ZED_SYSLOG_TAG:=zed}" \ -p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \ `basename "$0"`: "${MAIL}" not installed exit 3 fi NAME="zed.${ZEVENT_SUBCLASS}.email" LOCKFILE="${ZED_LOCKDIR:=/var/lock}/${NAME}.lock" STATEFILE="${ZED_RUNDIR:=/var/run}/${NAME}.state" # Obtain lock to ensure mutual exclusion for accessing state. exec 8> "${LOCKFILE}" flock -x 8 # Query state for last time email was sent for this pool. TIME_NOW=`date +%s` TIME_LAST=`egrep "^${ZEVENT_POOL};" "${STATEFILE}" 2>/dev/null | cut -d ";" -f2` if test -n "${TIME_LAST}"; then TIME_DELTA=`expr "${TIME_NOW}" - "${TIME_LAST}"` if test "${TIME_DELTA}" -lt "${ZED_EMAIL_INTERVAL_SECS:=3600}"; then exit 2 fi fi "${MAIL}" -s "ZFS ${ZEVENT_SUBCLASS} error for ${ZEVENT_POOL} on `hostname`" \ "${ZED_EMAIL}" <<EOF A ZFS ${ZEVENT_SUBCLASS} error has been detected: eid: ${ZEVENT_EID} host: `hostname` time: ${ZEVENT_TIME_STRING} pool: ${ZEVENT_POOL} EOF MAIL_STATUS=$? # Update state. egrep -v "^${ZEVENT_POOL};" "${STATEFILE}" 2>/dev/null > "${STATEFILE}.$$" echo "${ZEVENT_POOL};${TIME_NOW}" >> "${STATEFILE}.$$" mv -f "${STATEFILE}.$$" "${STATEFILE}" if test "${MAIL_STATUS}" -ne 0; then logger -t "${ZED_SYSLOG_TAG:=zed}" \ -p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \ `basename "$0"`: "${MAIL}" exit="${MAIL_STATUS}" exit 1 fi exit 0