#!/bin/sh
# Copyright (c) 2010 Malte S. Stretz
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

SUDO=
SUDOS=sudo
if [ -n "$DISPLAY" ]; then
    SUDOS="gksudo kdesudo"
    if [ -n "$KDE_FULL_SESSION" ]; then
        SUDOS="kdesudo gksudo"
    fi
fi
for s in $SUDOS; do
    if [ -x /usr/bin/$s ]; then
        SUDO=/usr/bin/$s
        break
    fi
done

USER=root
DESKTOP=

while [ -n "$1" ]; do
  case "$1" in
      --)
          shift
          break
      ;;
      -u|--user)
          USER=$2
          shift 2
      ;;
      --desktop)
          DESKTOP=$2
          shift 2
      ;;
      --help)
          echo "Usage: $0 [-u|--user <user>] [--desktop <desktop-file>] command"
          exit
      ;;
      -*)
          echo $0: unsupported option "$1" >&2
          exit 1
      ;;
      *)
          break;
      ;;
  esac
done

case "$SUDO" in
    */sudo)
        exec $SUDO -u "$USER" -- "$@"
    ;;
    */gksudo)
        exec $SUDO -u "$USER" "${DESKTOP:+-D $DESKTOP}" -- "$@"
    ;;
    */kdesudo)
        exec $SUDO -u "$USER" "${DESKTOP:+--desktop $DESKTOP}" -- "$@"
    ;;
    *)
        echo "$0: couldn't find a working sudo." >&2
        exit 1
    ;;
esac