cmd/zed/zed.d/generic-email.sh

   1 #!/bin/sh
   2 #
   3 # Send email to ZED_EMAIL in response to a given zevent.
   4 # This is a generic script than can be symlinked to a file in the zed
   5 #   enabled-scripts directory in order to have email sent when a particular
   6 #   class of zevents occurs.  The symlink filename must begin with the zevent
   7 #   (sub)class string (eg, "probe_failure-email.sh" for the "probe_failure"
   8 #   subclass).  Refer to the zed(8) manpage for details.
   9 # Exit codes:
  10 #   0: email sent
  11 #   1: email failed
  12 #   2: email suppressed
  13 #   3: missing executable
  14 #
  15 test -f "${ZED_ZEDLET_DIR}/zed.rc" && . "${ZED_ZEDLET_DIR}/zed.rc"
  16
  17 # Only send email if ZED_EMAIL has been configured.
  18 test -n "${ZED_EMAIL}" || exit 2
  19
  20 # Ensure requisite executables are installed.
  21 if ! command -v "${MAIL:=mail}" >/dev/null 2>&1; then
  22   logger -t "${ZED_SYSLOG_TAG:=zed}" \
  23     -p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \
  24     `basename "$0"`: "${MAIL}" not installed
  25   exit 3
  26 fi
  27
  28 # Override the default umask to restrict access to the msgbody tmpfile.
  29 umask 077
  30
  31 SUBJECT="ZFS ${ZEVENT_SUBCLASS} event"
  32 test -n "${ZEVENT_POOL}" && SUBJECT="${SUBJECT} for ${ZEVENT_POOL}"
  33 SUBJECT="${SUBJECT} on `hostname`"
  34
  35 MSGBODY="${TMPDIR:=/tmp}/`basename \"$0\"`.$$"
  36 {
  37   echo "A ZFS ${ZEVENT_SUBCLASS} event has been posted:"
  38   echo
  39   echo "   eid: ${ZEVENT_EID}"
  40   echo "  host: `hostname`"
  41   echo "  time: ${ZEVENT_TIME_STRING}"
  42   test -n "${ZEVENT_VDEV_TYPE}" -a -n "${ZEVENT_VDEV_PATH}" && \
  43     echo "  vdev: ${ZEVENT_VDEV_TYPE}:${ZEVENT_VDEV_PATH}"
  44   test -n "${ZEVENT_POOL}" -a -x "${ZPOOL}" && \
  45     "${ZPOOL}" status "${ZEVENT_POOL}"
  46 } > "${MSGBODY}"
  47
  48 test -f "${MSGBODY}" && "${MAIL}" -s "${SUBJECT}" "${ZED_EMAIL}" < "${MSGBODY}"
  49 MAIL_STATUS=$?
  50 rm -f "${MSGBODY}"
  51
  52 if test "${MAIL_STATUS}" -ne 0; then
  53   logger -t "${ZED_SYSLOG_TAG:=zed}" \
  54     -p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \
  55     `basename "$0"`: "${MAIL}" exit="${MAIL_STATUS}"
  56   exit 1
  57 fi
  58
  59 exit 0