#!/bin/bash
-shopt -s extdebug
-bash-trace() {
- # shows function args when: shopt -s extdebug
- local -i argc_index=0 arg frame i start=${1:-1} max_indent=8 indent
- local source
- local extdebug=false
- if [[ $(shopt -p extdebug) == *-s* ]]; then
- extdebug=true
- fi
-
- for ((frame=0; frame < ${#FUNCNAME[@]}-1; frame++)); do
- argc=${BASH_ARGC[frame]}
- argc_index+=$argc
- ((frame < start)) && continue
- if (( ${#BASH_SOURCE[@]} > 1 )); then
- source="${BASH_SOURCE[frame+1]}:${BASH_LINENO[frame]}:"
- fi
- indent=$((frame-start+1))
- indent=$((indent < max_indent ? indent : max_indent))
- printf "%${indent}s↳%sin \`%s" '' "$source" "${FUNCNAME[frame]}"
- if $extdebug; then
- for ((i=argc_index-1; i >= argc_index-argc; i--)); do
- printf " %s" "${BASH_ARGV[i]}"
- done
- fi
- echo \'
- done
-}
-
-
-errcatch() {
- set -E; shopt -s extdebug
- _err-trap() {
- err=$?
- exec >&2
- echo "${BASH_SOURCE[1]}:${BASH_LINENO[0]}:in \`$BASH_COMMAND' returned $err"
- bash-trace 2
- echo "$0: exiting with code $err"
- exit $err
- }
- trap _err-trap ERR
- set -o pipefail
-}
-
-errcatch
-
[[ $EUID == 0 ]] || exec sudo "$BASH_SOURCE" "$@"
+x="$(readlink -f "$BASH_SOURCE")"; source "${x%/*}/bash-trace"
+
usage() {
cat <<EOF
Usage: ${0##*/} [OPTIONS] +/-SIZE[g] swap|boot