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#!/bin/bash
# This file is part of Firejail project
# Copyright (C) 2014-2021 Firejail Authors
# License GPL v2
set -x
# gdb setuid helper script.
# This script forks a background process as the current user which will
# immediately send itself a `STOP` signal. Then gdb running as root will
# attach to that process, which will send it the `CONT` signal to continue
# execution. Then the backgrounded process will exec the program with the
# given arguments. This will allow the root gdb to trace the unprivileged
# setuid firejail process from the absolute beginning.
if [ -z "${1##*/firejail}" ]; then
FIREJAIL=$1
else
# First argument is not named firejail, then add default unless environment
# variable already set.
set -- ${FIREJAIL:=$(which firejail)} "$@"
fi
bash -c "kill -STOP \$\$; exec \"\$0\" \"\$@\"" "$@" &
sudo gdb -e "$FIREJAIL" -p "$!"
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