mirror of
https://github.com/bashclub/bashclub-zfs-push-pull.git
synced 2024-11-07 21:01:58 +01:00
720754a504
Ensure the backup connection to the SSH server can't do anything other than designed. Uses ssh's authorized_keys command= statement to launch backup-zfs-shell, which then supports only the handful of operations required to perform backups. $destpath is no longer used, but still included in the documentation until it can be entirely written out.
34 lines
1.5 KiB
Bash
Executable File
34 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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# A restricted shell for backup-zfs's SSH mode. Must be installed on the
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# SSH server, and then configured with command="/path/to/backup-zfs-shell"
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# in the user's authorized_keys file.
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# TODO: tag & dest should support better customization
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dest=zfssnap.nobackup
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tag=frodo
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case "$SSH_ORIGINAL_COMMAND" in
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zfslast)
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exec cat $dest/.last ;;
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zfslast\ ${tag}_20[12][0-9]-[01][0-9]-[0-3][0-9]_[012][0-9]:[0-5][0-9]:[0-5][0-9])
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exec echo "${SSH_ORIGINAL_COMMAND/zfslast /}" > "$dest/.last" ;;
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zfswrite\ ${tag}_20[12][0-9]-[01][0-9]-[0-3][0-9]_[012][0-9]:[0-5][0-9]:[0-5][0-9].zfssnap.gpg)
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exec cat > "$dest/${SSH_ORIGINAL_COMMAND/zfswrite /}" ;;
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zfswrite\ ${tag}_20[12][0-9]-[01][0-9]-[0-3][0-9]_[012][0-9]:[0-5][0-9]:[0-5][0-9].zfssnap)
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exec cat > "$dest/${SSH_ORIGINAL_COMMAND/zfswrite /}" ;;
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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)
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exec cat "${SSH_ORIGINAL_COMMAND/zfsget /}" ;;
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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)
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exec cat "${SSH_ORIGINAL_COMMAND/zfsget /}" ;;
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zfsfind)
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exec find "$dest" -name "*.zfssnap" -o -name "*zfssnap.gpg" ;;
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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)
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exec rm "${SSH_ORIGINAL_COMMAND/rm /}" ;;
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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)
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exec rm "${SSH_ORIGINAL_COMMAND/rm /}" ;;
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*)
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echo "Command not allowed: $SSH_ORIGINAL_COMMAND" >&2
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exit 1
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;;
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esac
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