#!/bin/sh
# get build-id of binary

set -e

usage() {
    echo "Usage: getbuildid [flag] file";
    echo "       print build-id of an object file"
    echo "flags:"
    echo "  -f : full build-id (default)."
    echo "  -s : short build-id aka the first two characters."
}

if test $# -lt 1; then usage; exit 77; fi
if test $# -gt 3; then usage; exit 77; fi

if test $# -eq 1; then
 LC_ALL=C readelf -n "$1" |  grep -i 'Build Id:' | sed 's/.*:[[:blank:]]*\([[:digit:]|abcdef]*\).*/\1/g'
else
 case "x$1" in
     'x-f')
	LC_ALL=C readelf -n "$2" |  grep -i 'Build Id:' | sed 's/.*:[[:blank:]]*\([[:digit:]|abcdef]*\).*/\1/g' ;;
     'x-s')
	LC_ALL=C readelf -n "$2" |  grep -i 'Build Id:' | sed 's/.*:[[:blank:]]*\([[:digit:]|abcdef]\{2\}\).*/\1/g' ;;
     *)
	exit 2;
 esac
fi

exit 0;