74 lines
1.7 KiB
Bash
74 lines
1.7 KiB
Bash
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#!/bin/sh
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#
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# Track changes to enumerated pools for use in early-boot
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set -ef
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FSLIST_DIR="@sysconfdir@/zfs/zfs-list.cache"
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FSLIST_TMP="@runstatedir@/zfs-list.cache.new"
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FSLIST="${FSLIST_DIR}/${ZEVENT_POOL}"
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# If the pool specific cache file is not writeable, abort
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[ -w "${FSLIST}" ] || exit 0
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[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
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. "${ZED_ZEDLET_DIR}/zed-functions.sh"
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zed_exit_if_ignoring_this_event
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zed_check_cmd "${ZFS}" sort diff grep
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# If we are acting on a snapshot, we have nothing to do
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printf '%s' "${ZEVENT_HISTORY_DSNAME}" | grep '@' && exit 0
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# We obtain a lock on zfs-list to avoid any simultaneous writes.
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# If we run into trouble, log and drop the lock
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abort_alter() {
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zed_log_msg "Error updating zfs-list.cache!"
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zed_unlock zfs-list
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}
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finished() {
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zed_unlock zfs-list
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trap - EXIT
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exit 0
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}
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case "${ZEVENT_HISTORY_INTERNAL_NAME}" in
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create|"finish receiving"|import|destroy|rename)
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;;
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export)
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zed_lock zfs-list
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trap abort_alter EXIT
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echo > "${FSLIST}"
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finished
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;;
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set|inherit)
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# Only act if the mountpoint or canmount setting is altered.
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case "${ZEVENT_HISTORY_INTERNAL_STR}" in
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canmount=*|mountpoint=*) ;;
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*) exit 0 ;;
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esac
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;;
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*)
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# Ignore all other events.
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exit 0
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;;
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esac
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zed_lock zfs-list
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trap abort_alter EXIT
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"${ZFS}" list -H -tfilesystem -oname,mountpoint,canmount -r "${ZEVENT_POOL}" \
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>"${FSLIST_TMP}"
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# Sort the output so that it is stable
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sort "${FSLIST_TMP}" -o "${FSLIST_TMP}"
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# Don't modify the file if it hasn't changed
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diff -q "${FSLIST_TMP}" "${FSLIST}" || mv "${FSLIST_TMP}" "${FSLIST}"
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rm -f "${FSLIST_TMP}"
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finished
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