kill_chroot_inside.sh

#!/bin/bash

ROOT_STAT=`stat -c %d:%i /proc/1/root/`
VERBOSE="verbose"

set -e
fatal()
{
    echo "error: $1" 1>&2
    exit 1
}

info()
{
    if [ "$VERBOSE" = "verbose" ]; then
        echo "$1"
    fi
    return 0
}
# Wrapper around kill command. Turns errors into
# warnings when running in verbose mode, otherwise
# it ignores them.
# args: parameters for kill
kill_proc()
{
    if ! kill "$@" 2>/dev/null; then
        info "kill $@ failed: process already terminated?"
    fi
}


if [ "$(stat -c %d:%i /)" == "$ROOT_STAT" ]; then
	echo "not chroot. returning" >&2
	exit
fi

kill_wait()
{
	pid=$1
	kill_proc -TERM "$pid"
	count=0
	max=5
	while [ -d /proc/"$pid" ]; do
	    count=$(( $count + 1 ))
	    info "  Waiting for pid $pid to shut down... ($count/$max)"
	    sleep 1
	# Wait for $max seconds for process to die before -9'ing it
	    if [ "$count" -eq "$max" ]; then
		info "  Sending SIGKILL to pid $pid"
		kill_proc -KILL "$pid"
		sleep 1
		break
	    fi
	done
}

initctl list | awk '/start\/running/ {print $1}' | xargs -n1 -r initctl stop

for proc in /proc/*/root/; do
	PARENT=`dirname $proc`
	if [ ! -h "$PARENT" -a -d "$PARENT" ]; then
		TARGET=`stat -c %d:%i $proc`
		if [ "$TARGET" != "$ROOT_STAT" ]; then
			pid=`echo $proc | cut -d/ -f3`
			if [ "$$" -eq "$pid" ]; then
				info "skipping self"
				continue
			fi
			info "Killing left-over pid $pid"
			info "  Sending SIGTERM to pid $pid"

			kill_wait "$pid"
		fi
	fi
done

kill_chroot_outside.sh

#!/bin/sh
# Copyright © 2007       Kees Cook <kees@outflux.net>
# Copyright © 2007-2013  Roger Leigh <rleigh@debian.org>
#
# schroot is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# schroot is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see
# <http://www.gnu.org/licenses/>.
#
#####################################################################

set -e
CHROOT_PATH="$1"
fatal()
{
    echo "error: $1" 1>&2
    exit 1
}

info()
{
    if [ "$VERBOSE" = "verbose" ]; then
        echo "$1"
    fi
    return 0
}


# Wrapper around kill command. Turns errors into
# warnings when running in verbose mode, otherwise
# it ignores them.
# args: parameters for kill
kill_proc()
{
    if ! kill "$@" 2>/dev/null; then
        info "kill $@ failed: process already terminated?"
    fi
}

# Kill all processes that were run from within the chroot environment
# $1: mount base location
do_kill_all()
{
    if [ -z "$1" ]; then
        fatal "No path for finding stray processes: not reaping processes in chroot"
    fi

    info "Killing processes run inside $1"
    ls /proc | egrep '^[[:digit:]]+$' |
    while read pid; do
        # Check if process root are the same device/inode as chroot
        # root (for efficiency)
        if [ /proc/"$pid"/root -ef "$1" ]; then
            # Check if process and chroot root are the same (may be
            # different even if device/inode match).
            root=$(readlink /proc/"$pid"/root || true)
            if [ "$root" = "$1" ]; then
                exe=$(readlink /proc/"$pid"/exe || true)
                info "Killing left-over pid $pid (${exe##$1})"
                info "  Sending SIGTERM to pid $pid"

                kill_proc -TERM "$pid"

                count=0
                max=5
                while [ -d /proc/"$pid" ]; do
                    count=$(( $count + 1 ))
                    info "  Waiting for pid $pid to shut down... ($count/$max)"
                    sleep 1
                # Wait for $max seconds for process to die before -9'ing it
                    if [ "$count" -eq "$max" ]; then
                        info "  Sending SIGKILL to pid $pid"
                        kill_proc -KILL "$pid"
                        sleep 1
                        break
                    fi
                done
            fi
        fi
    done
}

do_kill_all "$CHROOT_PATH"