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The executables invoked by the ZED in response to a given zevent have been generically referred to as "scripts". By convention, these scripts have aimed to be /bin/sh compatible for reasons of portability and comprehensibility. However, the ZED only requires they be executable and (ideally) capable of reading environment variables. As such, these scripts are now referred to as ZEDLETs (ZFS Event Daemon Linkage for Executable Tasks). Signed-off-by: Chris Dunlap <cdunlap@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #2735
60 lines
1.9 KiB
Bash
Executable File
60 lines
1.9 KiB
Bash
Executable File
#!/bin/sh
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#
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# Send email to ZED_EMAIL in response to a given zevent.
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# This is a generic script than can be symlinked to a file in the zed
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# enabled-scripts directory in order to have email sent when a particular
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# class of zevents occurs. The symlink filename must begin with the zevent
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# (sub)class string (eg, "probe_failure-email.sh" for the "probe_failure"
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# subclass). Refer to the zed(8) manpage for details.
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# Exit codes:
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# 0: email sent
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# 1: email failed
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# 2: email suppressed
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# 3: missing executable
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#
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test -f "${ZED_ZEDLET_DIR}/zed.rc" && . "${ZED_ZEDLET_DIR}/zed.rc"
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# Only send email if ZED_EMAIL has been configured.
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test -n "${ZED_EMAIL}" || exit 2
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# Ensure requisite executables are installed.
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if ! command -v "${MAIL:=mail}" >/dev/null 2>&1; then
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logger -t "${ZED_SYSLOG_TAG:=zed}" \
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-p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \
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`basename "$0"`: "${MAIL}" not installed
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exit 3
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fi
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# Override the default umask to restrict access to the msgbody tmpfile.
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umask 077
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SUBJECT="ZFS ${ZEVENT_SUBCLASS} event"
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test -n "${ZEVENT_POOL}" && SUBJECT="${SUBJECT} for ${ZEVENT_POOL}"
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SUBJECT="${SUBJECT} on `hostname`"
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MSGBODY="${TMPDIR:=/tmp}/`basename \"$0\"`.$$"
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{
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echo "A ZFS ${ZEVENT_SUBCLASS} event has been posted:"
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echo
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echo " eid: ${ZEVENT_EID}"
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echo " host: `hostname`"
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echo " time: ${ZEVENT_TIME_STRING}"
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test -n "${ZEVENT_VDEV_TYPE}" -a -n "${ZEVENT_VDEV_PATH}" && \
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echo " vdev: ${ZEVENT_VDEV_TYPE}:${ZEVENT_VDEV_PATH}"
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test -n "${ZEVENT_POOL}" -a -x "${ZPOOL}" && \
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"${ZPOOL}" status "${ZEVENT_POOL}"
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} > "${MSGBODY}"
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test -f "${MSGBODY}" && "${MAIL}" -s "${SUBJECT}" "${ZED_EMAIL}" < "${MSGBODY}"
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MAIL_STATUS=$?
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rm -f "${MSGBODY}"
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if test "${MAIL_STATUS}" -ne 0; then
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logger -t "${ZED_SYSLOG_TAG:=zed}" \
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-p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \
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`basename "$0"`: "${MAIL}" exit="${MAIL_STATUS}"
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exit 1
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fi
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exit 0
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