# $Id: vserver.stop,v 1.31 2006/01/21 13:22:23 ensc Exp $  --*- sh -*--

# Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
#  
# This program 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; version 2 of the License.
#  
# This program 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.


lock "$__LOCKDIR"/vserver."$($_VSERVER_INFO "$VSERVER_DIR" CANONIFY)".startup

if ! isVserverRunning "$VSERVER_DIR" S_CONTEXT; then
    warning $"vserver '$VSERVER_NAME' is not running" >&2
    test -n "$OPTION_DEBUG" || exec 2>/dev/null >/dev/null
    umountVserver     "$VSERVER_DIR" || :
    disableInterfaces "$VSERVER_DIR" || :
    unlock
    exit 0
fi

function cleanup
{
    set +e
    unlock
    
    test ! -p "$sync_fifo" || {
	$_RM -f "$sync_fifo"
	$_RMDIR $($_DIRNAME "$sync_fifo")
    }

    test ! -d "$vwait_statdir" ||
	$_RM -rf "$vwait_statdir"
}

vwait_statdir=
vwait_pid=
sync_fifo=
trap "cleanup" EXIT

OPTION_FORCE_SYNC=1

set -e
generateOptions   "$VSERVER_DIR"
set +e

vshelper.doDestroy "$VSERVER_DIR" "$S_CONTEXT"
initSync           "$VSERVER_DIR" "$S_CONTEXT" sync_fifo
prepareStop        "$VSERVER_DIR"

cd "$VSERVER_DIR"/vdir/
execScriptlets     "$VSERVER_DIR" "$VSERVER_NAME" pre-stop
cd "$VSERVER_DIR"/vdir/

test -z "$OPTION_DEFAULTTTY" || setDefaultTTY "$VSERVER_DIR"

fail=
initWait	   "$VSERVER_DIR" "$S_CONTEXT" vwait_statdir
if test -n "$_IS_FAKEINIT" && \
   $_VSERVER_INFO - FEATURE vkill; then
    $_VKILL -s INT --xid "$S_CONTEXT" -- 1 || fail=1
    ## HACK: remove the 'initpid' stuff above when PID virtualization
    ## is implemented
elif $_VSERVER_INFO - FEATURE migrate; then
    "${NICE_CMD[@]}" \
    ${USE_VNAMESPACE:+$_VNAMESPACE --enter "$S_CONTEXT" -- } \
    $_VCONTEXT $SILENT_OPT --migrate --chroot --xid "$S_CONTEXT" -- \
    "${INITCMD_STOP[@]}" || fail=1
else
    "${NICE_CMD[@]}" \
    "$_CHBIND"       "${CHBIND_OPTS[@]}" \
    "$_EXEC_ULIMIT"  "$VSERVER_DIR/ulimits" \
    ${USE_VNAMESPACE:+$_VNAMESPACE --enter "$S_CONTEXT"} \
    $_CHCONTEXT_COMPAT    "${CHCONTEXT_OPTS[@]}" \
    "$_CAPCHROOT"    "${CAPCHROOT_OPTS[@]}" "." \
    "${INITCMD_STOP[@]}" || fail=1
fi

waitForSync "$VSERVER_DIR" "$sync_fifo" "$vwait_statdir"

vshelper.doDestroy "$VSERVER_DIR" "$S_CONTEXT"
sendKillSequence   "$S_CONTEXT" "${INITKILL_SEQ[@]}"

## Small hack... isVserverRunning removes stale runfiles as a sideeffect
! isVserverRunning  "$VSERVER_DIR" || \
    echo $"Vserver '$VSERVER_DIR' still running unexpectedly; please investigate it manually..." >&2

execScriptlets    "$VSERVER_DIR" "$VSERVER_NAME" post-stop
    
umountVserver     "$VSERVER_DIR" || :
disableInterfaces "$VSERVER_DIR"
#
# <Bertl> it's a 'feature' introduced by recent kernels ...
# <Bertl> proc inodes stay around as long as they want to
# <Bertl> and processes too, even if they are dead
# <Bertl> as long as the process won't go away, the context will not either
# <Bertl> and the process won't go away, as long as the proc entry exists ...
# <Bertl> and the proc entry (in /proc/<pid>...) will remain until the proc inodes are purged
# <Bertl> maybe I just add a hack to do exactly that on vserver stop
# <Bertl> but you can also add the proc remount hack in userspace
#
mount -o remount,rw /proc

saveDiskLimits    "$VSERVER_DIR"

execScriptlets    "$VSERVER_DIR" "$VSERVER_NAME" postpost-stop
