#!/bin/sh
#
# $OpenBSD: ctfstrip,v 1.3 2017/08/11 15:08:16 jasper Exp $
#
# Copyright (c) 2017 Martin Pieuchot 
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

set -o posix

cleanup() {
	rm -f ${TMPFILE}
	exit 1
}

trap "cleanup" 1 2 3 13 15

USAGE="usage: ${0##*/} [-S] [-o outfile] file"

while getopts "o:S" opt; do
	case $opt in
	S)	STRIPFLAG=-g;;
	o)	OUTFILE="${OPTARG}";;
	*)	print -u2 "${USAGE}"; exit 1;;
	esac
done
shift $((OPTIND-1))

if [[ $# == 0 ]]; then
	print -u2 "${USAGE}";
	exit 1
fi

LABEL="unknown"
TMPFILE=$(mktemp /tmp/.ctf.XXXXXXXXXX)

# Extract kernel version
if [[ "$1" == bsd* ]]; then
	LABEL=`what $1 |tr -d '\n'|awk -F"$1	" '{ print $2 '\n' }'`
fi

ctfconv -o ${TMPFILE} -l "${LABEL}" $1 || cleanup

objcopy --add-section .SUNW_ctf=${TMPFILE} ${STRIPFLAG} $1 ${OUTFILE}

rm -f ${TMPFILE}