67 lines
961 B
Bash
67 lines
961 B
Bash
#!/hint/bash
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# 2018 Luke Shumaker
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print() {
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# shellcheck disable=SC2059
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printf "$(gettext -- "$1")\\n" "${@:2}"
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}
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error() {
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local msg
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msg="$(print "${@:2}")"
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printf '%s: %s\n' "${0##*/}" "$msg" >&2
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if (( $1 != 0 )); then
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exit "$1"
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fi
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}
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in_array() {
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local needle=$1
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local straw
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for straw in "${@:2}"; do
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if [[ $needle = "$straw" ]]; then
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return 0
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fi
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done
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return 1
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}
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is_sudo() {
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(( UID == 0 && ${SUDO_UID:-0} != 0 ))
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}
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is_root() {
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(( UID = 0 ))
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}
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needs_sudo() {
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if ! is_sudo; then
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error 4 "Must be invoked through sudo."
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fi
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}
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needs_root() {
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if ! is_root; then
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error 4 "Must be invoked as root."
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fi
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}
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become_sudo() {
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if is_sudo; then
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return 0
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fi
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if is_root; then
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needs_sudo
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fi
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sudo "${BASH_SOURCE[0]}" "$@"
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}
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with_mount() {
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arg_device=$1
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arg_mountpoint=$2
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arg_cmd=("${@:3}")
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needs_root
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unshare --mount sh -c "mount --make-rslave / && mount -- ${arg_device@Q} ${arg_mountpoint@Q} && exec -- ${arg_cmd[@]@Q}"
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}
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