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Chriz 2022-12-25 22:40:17 +01:00 committed by GitHub
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backup-zfs-shell
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#!/bin/bash
# A restricted shell for backup-zfs's SSH mode. Must be installed on the
# SSH server, and then configured with command="/path/to/backup-zfs-shell"
# in the user's authorized_keys file.
# TODO: tag & dest should support better customization
dest=zfssnap.nobackup
tag=frodo
case "$SSH_ORIGINAL_COMMAND" in
zfslast)
exec cat $dest/.last ;;
zfslast\ ${tag}_20[12][0-9]-[01][0-9]-[0-3][0-9]_[012][0-9]:[0-5][0-9]:[0-5][0-9])
exec echo "${SSH_ORIGINAL_COMMAND/zfslast /}" > "$dest/.last" ;;
zfswrite\ ${tag}_20[12][0-9]-[01][0-9]-[0-3][0-9]_[012][0-9]:[0-5][0-9]:[0-5][0-9].zfssnap.gpg)
exec cat > "$dest/${SSH_ORIGINAL_COMMAND/zfswrite /}" ;;
zfswrite\ ${tag}_20[12][0-9]-[01][0-9]-[0-3][0-9]_[012][0-9]:[0-5][0-9]:[0-5][0-9].zfssnap)
exec cat > "$dest/${SSH_ORIGINAL_COMMAND/zfswrite /}" ;;
zfsget\ $dest/${tag}_20[12][0-9]-[01][0-9]-[0-3][0-9]_[012][0-9]:[0-5][0-9]:[0-5][0-9].zfssnap.gpg)
exec cat "${SSH_ORIGINAL_COMMAND/zfsget /}" ;;
zfsget\ $dest/${tag}_20[12][0-9]-[01][0-9]-[0-3][0-9]_[012][0-9]:[0-5][0-9]:[0-5][0-9].zfssnap)
exec cat "${SSH_ORIGINAL_COMMAND/zfsget /}" ;;
zfsfind)
exec find "$dest" -name "*.zfssnap" -o -name "*zfssnap.gpg" ;;
rm\ $dest/${tag}_20[12][0-9]-[01][0-9]-[0-3][0-9]_[012][0-9]:[0-5][0-9]:[0-5][0-9].zfssnap.gpg)
exec rm "${SSH_ORIGINAL_COMMAND/rm /}" ;;
rm\ $dest/${tag}_20[12][0-9]-[01][0-9]-[0-3][0-9]_[012][0-9]:[0-5][0-9]:[0-5][0-9].zfssnap)
exec rm "${SSH_ORIGINAL_COMMAND/rm /}" ;;
*)
echo "Command not allowed: $SSH_ORIGINAL_COMMAND" >&2
exit 1
;;
esac