#!/bin/sh
# Copyright © 2007  Kees Cook <kees@outflux.net>
# Copyright © 2007  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

if [ -f "$CHROOT_SCRIPT_CONFIG" ]; then
    . "$CHROOT_SCRIPT_CONFIG"
elif [ "$2" = "ok" ]; then
    echo "script-config file '$CHROOT_SCRIPT_CONFIG' does not exist"
    exit 1
fi

# Kill all processes that were run from within the chroot environment
# $1: mount base location
do_kill_all()
{
    if [ "$AUTH_VERBOSITY" = "verbose" ]; then
        echo "Killing processes run inside $1"
    fi
    ls /proc | egrep '^[[:digit:]]+$' |
    while read pid; do
        root=$(readlink /proc/"$pid"/root || true)
        if [ "$root" = "$1" ]; then
            if [ "$AUTH_VERBOSITY" = "verbose" ]; then
                exe=$(readlink /proc/"$pid"/exe || true)
                echo "Killing left-over pid $pid (${exe##$1})"
                echo "  Sending SIGTERM to pid $pid"
            fi
            kill -TERM "$pid" 2>/dev/null

            count=0
            max=5
            while [ -d /proc/"$pid" ]; do
                count=$(( $count + 1 ))
                if [ "$AUTH_VERBOSITY" = "verbose" ]; then
                    echo "  Waiting for pid $pid to shut down... ($count/$max)"
                fi
                sleep 1
                # Wait for $max seconds for process to die before -9'ing it
                if [ "$count" -eq "$max" ]; then
                    if [ "$AUTH_VERBOSITY" = "verbose" ]; then
                        echo "  Sending SIGKILL to pid $pid"
                    fi
                    kill -KILL "$pid" 2>/dev/null
                    sleep 1
                    break
                fi
            done
        fi
    done
}

if [ $1 = "setup-recover" ] || [ $1 = "setup-stop" ]; then
    do_kill_all "$CHROOT_MOUNT_LOCATION"
fi