#!/bin/bash

# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Work around a bug on precise where gvfs trash goes looking in mounts
# it shouldn't, resulting in the umount failing when it shouldn't.
# See crosbug.com/23443 for the sordid details.

suppressed_dir=$(dirname "$0")
cleaned_path=$(echo "${PATH}" | sed -r -e "s,(^|:)${suppressed_dir}(:|$),,g")
binary=$(PATH="${cleaned_path}" type -P umount)
if [ $? -ne 0 ]; then
  echo "umount: command not found" >&2
  exit 127
fi

for x in {1..10}; do
  # umount doesn't give use a distinct exit code for device is busy; thus grep
  # the output.
  output=$(LC_ALL=C "${binary}" "$@" 2>&1)
  ret=$?
  if [ ${ret} -eq 0 ] || [[ "${output}" != *"device is busy"* ]]; then
    # Nothing to do in these scenarios; either ran fine, or it failed in a non
    # busy fashion.
    break
  fi
  sleep 1
done

echo -n "${output}" >&2
exit ${ret}