source: vbox/trunk/src/VBox/HostDrivers/Support/linux/build_in_tmp@ 4163

#!/bin/sh

#
# Script to build a kernel module in /tmp. Useful if the module sources
# are installed in read-only directory.
#
#  Copyright (C) 2007 innotek GmbH
# 
#  This file is part of VirtualBox Open Source Edition (OSE), as
#  available from http://www.virtualbox.org. This file 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,
#  in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
#  distribution. VirtualBox OSE is distributed in the hope that it will
#  be useful, but WITHOUT ANY WARRANTY of any kind.

# find a unique temp directory
num=0
while true; do
  tmpdir="/tmp/vbox.$num"
  if mkdir -m 0755 "$tmpdir" 2> /dev/null; then
    break
  fi
  num=`expr $num + 1`
  if  [ $num -gt 200 ]; then
    echo "Could not find a valid tmp directory"
    exit 1
  fi
done

if [ "$1" = "--save-module-symvers" ]; then
  shift
  SAVE_MOD_SYMVERS="$1"
  shift
fi

if [ "$1" = "--use-module-symvers" ]; then
  shift
  USE_MOD_SYMVERS="$1"
  shift
fi

# copy
cp -a ${0%/*}/* $tmpdir/
if [ -n "$USE_MOD_SYMVERS" ]; then
  cp $USE_MOD_SYMVERS $tmpdir/Module.symvers
fi

# make, cleanup if success
cd "$tmpdir"
if make "$@"; then
  if [ -n "$SAVE_MOD_SYMVERS" ]; then
    if [ -f Module.symvers ]; then
      cp -f Module.symvers $SAVE_MOD_SYMVERS
    else
      cat /dev/null > $SAVE_MOD_SYMVERS
    fi
  fi
  rm -rf $tmpdir
  exit 0
fi

# failure
exit 1