68 lines
1.4 KiB
Bash
68 lines
1.4 KiB
Bash
#!/hint/bash
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# License: Unspecified
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:
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# shellcheck disable=2034
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CHROOT_VERSION='v4'
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##
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# usage : check_root
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##
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orig_argv=("$0" "$@")
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check_root() {
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(( EUID == 0 )) && return
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if type -P sudo >/dev/null; then
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exec sudo -- "${orig_argv[@]}"
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else
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exec su root -c "$(printf ' %q' "${orig_argv[@]}")"
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fi
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}
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##
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# usage : is_btrfs( $path )
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# return : whether $path is on a btrfs
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##
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is_btrfs() {
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[[ -e "$1" && "$(stat -f -c %T "$1")" == btrfs ]]
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}
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##
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# usage : is_subvolume( $path )
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# return : whether $path is a the root of a btrfs subvolume (including
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# the top-level subvolume).
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##
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is_subvolume() {
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[[ -e "$1" && "$(stat -f -c %T "$1")" == btrfs && "$(stat -c %i "$1")" == 256 ]]
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}
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##
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# usage : is_same_fs( $path_a, $path_b )
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# return : whether $path_a and $path_b are on the same filesystem
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##
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is_same_fs() {
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[[ "$(stat -c %d "$1")" == "$(stat -c %d "$1")" ]]
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}
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##
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# usage : subvolume_delete_recursive( $path )
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#
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# Find all btrfs subvolumes under and including $path and delete them.
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##
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subvolume_delete_recursive() {
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local subvol
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is_subvolume "$1" || return 0
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while IFS= read -d $'\0' -r subvol; do
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if ! subvolume_delete_recursive "$subvol"; then
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return 1
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fi
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done < <(find "$1" -mindepth 1 -xdev -depth -inum 256 -print0)
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if ! btrfs subvolume delete "$1" &>/dev/null; then
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error "Unable to delete subvolume %s" "$subvol"
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return 1
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fi
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return 0
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}
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