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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>
60 lines
1.8 KiB
Bash
Executable File
60 lines
1.8 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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#
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# This is a generic script than can be symlinked to a file in the
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# enabled-zedlets directory to have an email sent when a particular class of
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# zevents occurs. The symlink filename must begin with the zevent (sub)class
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# string (e.g., "probe_failure-email.sh" for the "probe_failure" subclass).
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# Refer to the zed(8) manpage for details.
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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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[ -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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# Rate-limit the message based in part on the filename.
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#
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rate_limit_tag="${ZEVENT_POOL};${ZEVENT_SUBCLASS};$(basename -- "$0")"
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rate_limit_interval="${ZED_EMAIL_INTERVAL_SECS}"
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zed_rate_limit "${rate_limit_tag}" "${rate_limit_interval}" || exit 3
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umask 077
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pool_str="${ZEVENT_POOL:+" for ${ZEVENT_POOL}"}"
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host_str=" on $(hostname)"
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email_subject="ZFS ${ZEVENT_SUBCLASS} event${pool_str}${host_str}"
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email_pathname="${TMPDIR:="/tmp"}/$(basename -- "$0").${ZEVENT_EID}.$$"
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{
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echo "ZFS has posted the following event:"
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echo
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echo " eid: ${ZEVENT_EID}"
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echo " class: ${ZEVENT_SUBCLASS}"
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echo " host: $(hostname)"
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echo " time: ${ZEVENT_TIME_STRING}"
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if [ -n "${ZEVENT_VDEV_PATH}" ]; then
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echo " vpath: ${ZEVENT_VDEV_PATH}"
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[ -n "${ZEVENT_VDEV_TYPE}" ] && echo " vtype: ${ZEVENT_VDEV_TYPE}"
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fi
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[ -n "${ZEVENT_POOL}" ] && [ -x "${ZPOOL}" ] \
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&& "${ZPOOL}" status "${ZEVENT_POOL}"
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} > "${email_pathname}"
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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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