34 lines
1.0 KiB
Bash
Executable File
34 lines
1.0 KiB
Bash
Executable File
#!/bin/bash
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## A simple teardown hook to take a clean snapshot of the boot environment
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## prior to launching the new kernel. This requires that your pool be read-write
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## and will always export it.
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##
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## To use, put this script somewhere, make sure it is executable, and add the
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## path to the `zfsbootmenu_teardown` space-separated list with, e.g.,
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##
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## zfsbootmenu_teardown+=" <path to script> "
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##
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## in a dracut.conf(5) file inside the directory specified for the option
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## `Global.DracutConfDir` in the ZFSBootMenu `config.yaml`.
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# exit early if we're missing our env var
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[ -n "${ZBM_SELECTED_BE}" ] || exit
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for src in /lib/zfsbootmenu-core.sh /lib/kmsg-log-lib.sh ; do
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# shellcheck disable=SC1090
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source "${src}" || exit
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done
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zpool="${ZBM_SELECTED_BE%%/*}"
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if ! zpool list -H -o name "${zpool}" >/dev/null 2>&1 ; then
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read_write=true import_pool "${zpool}"
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else
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set_rw_pool "${zpool}"
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fi
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printf -v snapshot "${ZBM_SELECTED_BE}@preboot-%(%Y-%m-%d-%H%M%S)T"
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zfs snapshot "${snapshot}"
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export_pool "${zpool}"
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