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aded9a6814
This commit factors out several common ZEDLET code blocks into zed-functions.sh. This shortens the length of the scripts, thereby (hopefully) making them easier to understand and maintain. In addition, this commit revamps the coding style used by the scripts to be more consistent and (again, hopefully) maintainable. It now mostly follows the Google Shell Style Guide. I've tried to assimilate the following resources: Google Shell Style Guide https://google-styleguide.googlecode.com/svn/trunk/shell.xml Dash as /bin/sh https://wiki.ubuntu.com/DashAsBinSh Filenames and Pathnames in Shell: How to do it Correctly http://www.dwheeler.com/essays/filenames-in-shell.html Common shell script mistakes http://www.pixelbeat.org/programming/shell_script_mistakes.html Finally, this commit updates the exit codes used by the ZEDLETs to be more consistent with one another. All scripts run cleanly through ShellCheck <http://www.shellcheck.net/>. All scripts have been tested on bash and dash. Signed-off-by: Chris Dunlap <cdunlap@llnl.gov>
58 lines
1.5 KiB
Bash
Executable File
58 lines
1.5 KiB
Bash
Executable File
#!/bin/sh
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#
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# Send email to ZED_EMAIL in response to a CHECKSUM or IO error.
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#
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# Only one email per ZED_EMAIL_INTERVAL_SECS will be sent for a given
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# class/pool/vdev combination. This protects against spamming the recipient
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# should multiple events occur together in time for the same pool/device.
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#
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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 not configured
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# 3: email suppressed
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# 9: internal error
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[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
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. "${ZED_ZEDLET_DIR}/zed-functions.sh"
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[ -n "${ZED_EMAIL}" ] || exit 2
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[ -n "${ZEVENT_POOL}" ] || exit 9
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[ -n "${ZEVENT_SUBCLASS}" ] || exit 9
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[ -n "${ZEVENT_VDEV_PATH}" ] || exit 9
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if [ "${ZEVENT_SUBCLASS}" != "checksum" ] \
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&& [ "${ZEVENT_SUBCLASS}" != "io" ]; then
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zed_log_err "unsupported event class \"${ZEVENT_SUBCLASS}\""
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exit 9
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fi
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zed_check_cmd "mail" || exit 9
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zed_rate_limit "${ZEVENT_POOL};${ZEVENT_VDEV_PATH};${ZEVENT_SUBCLASS};email" \
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|| exit 3
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umask 077
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email_subject="ZFS ${ZEVENT_SUBCLASS} error for ${ZEVENT_POOL} on $(hostname)"
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email_pathname="${TMPDIR:="/tmp"}/$(basename -- "$0").${ZEVENT_EID}.$$"
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cat > "${email_pathname}" <<EOF
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A ZFS ${ZEVENT_SUBCLASS} error has been detected:
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eid: ${ZEVENT_EID}
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host: $(hostname)
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time: ${ZEVENT_TIME_STRING}
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pool: ${ZEVENT_POOL}
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vdev: ${ZEVENT_VDEV_TYPE}:${ZEVENT_VDEV_PATH}
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EOF
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mail -s "${email_subject}" "${ZED_EMAIL}" < "${email_pathname}"
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mail_status=$?
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if [ "${mail_status}" -ne 0 ]; then
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zed_log_msg "mail exit=${mail_status}"
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exit 1
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fi
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rm -f "${email_pathname}"
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exit 0
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