-#!/bin/sh
-#---------------------------------------------
-# xdg-su
-#
-# Utility script to run a command as an alternate user, generally
-# the root user, with a graphical prompt for the root
-# password if needed
-#
-# Refer to the usage() function below for usage.
-#
-# Copyright 2006, Jeremy White <jwhite@codeweavers.com>
-# Copyright 2006, Kevin Krammer <kevin.krammer@gmx.at>
-#
-# LICENSE:
-#
-# 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.
-#
-#---------------------------------------------
-
-manualpage()
-{
-cat << _MANUALPAGE
-Name
-
-xdg-su - run a GUI program as root after prompting for the root password
-
-Synopsis
-
-xdg-su [-u user] -c command
-
-xdg-su { --help | --manual | --version }
-
-Description
-
-xdg-su provides a graphical dialog that prompts the user for a password to run
-command as user or as root if no user was specified.
-
-xdg-su is for use inside a desktop session only.
-
-xdg-su discards any stdout and stderr output from command.
-
-Options
-
--u user
- run command as user. The default is to run as root.
---help
- Show command synopsis.
---manual
- Show this manualpage.
---version
- Show the xdg-utils version information.
-
-Exit Codes
-
-An exit code of 0 indicates success while a non-zero exit code indicates
-failure. The following failure codes can be returned:
-
-1
- Error in command line syntax.
-2
- One of the files passed on the command line did not exist.
-3
- A required tool could not be found.
-4
- The action failed.
-
-See Also
-
-su(1)
-
-Examples
-
-xdg-su -u root -c "/opt/shinythings/bin/install-GUI --install fast"
-
-Runs the /opt/shinythings/bin/install-GUI command with root permissions.
-
-_MANUALPAGE
-}
-
-usage()
-{
-cat << _USAGE
-xdg-su - run a GUI program as root after prompting for the root password
-
-Synopsis
-
-xdg-su [-u user] -c command
-
-xdg-su { --help | --manual | --version }
-
-_USAGE
-}
-
-#@xdg-utils-common@
-
-#----------------------------------------------------------------------------
-# Common utility functions included in all XDG wrapper scripts
-#----------------------------------------------------------------------------
-
-DEBUG()
-{
- [ ${XDG_UTILS_DEBUG_LEVEL-0} -lt $1 ] && return 0;
- shift
- echo "$@" >&2
-}
-
-#-------------------------------------------------------------
-# Exit script on successfully completing the desired operation
-
-exit_success()
-{
- if [ $# -gt 0 ]; then
- echo "$@"
- echo
- fi
-
- exit 0
-}
-
-
-#-----------------------------------------
-# Exit script on malformed arguments, not enough arguments
-# or missing required option.
-# prints usage information
-
-exit_failure_syntax()
-{
- if [ $# -gt 0 ]; then
- echo "xdg-su: $@" >&2
- echo "Try 'xdg-su --help' for more information." >&2
- else
- usage
- echo "Use 'man xdg-su' or 'xdg-su --manual' for additional info."
- fi
-
- exit 1
-}
-
-#-------------------------------------------------------------
-# Exit script on missing file specified on command line
-
-exit_failure_file_missing()
-{
- if [ $# -gt 0 ]; then
- echo "xdg-su: $@" >&2
- fi
-
- exit 2
-}
-
-#-------------------------------------------------------------
-# Exit script on failure to locate necessary tool applications
-
-exit_failure_operation_impossible()
-{
- if [ $# -gt 0 ]; then
- echo "xdg-su: $@" >&2
- fi
-
- exit 3
-}
-
-#-------------------------------------------------------------
-# Exit script on failure returned by a tool application
-
-exit_failure_operation_failed()
-{
- if [ $# -gt 0 ]; then
- echo "xdg-su: $@" >&2
- fi
-
- exit 4
-}
-
-#------------------------------------------------------------
-# Exit script on insufficient permission to read a specified file
-
-exit_failure_file_permission_read()
-{
- if [ $# -gt 0 ]; then
- echo "xdg-su: $@" >&2
- fi
-
- exit 5
-}
-
-#------------------------------------------------------------
-# Exit script on insufficient permission to read a specified file
-
-exit_failure_file_permission_write()
-{
- if [ $# -gt 0 ]; then
- echo "xdg-su: $@" >&2
- fi
-
- exit 6
-}
-
-check_input_file()
-{
- if [ ! -e "$1" ]; then
- exit_failure_file_missing "file '$1' does not exist"
- fi
- if [ ! -r "$1" ]; then
- exit_failure_file_permission_read "no permission to read file '$1'"
- fi
-}
-
-check_vendor_prefix()
-{
- file=`basename "$1"`
- case "$file" in
- [a-zA-Z]*-*)
- return
- ;;
- esac
-
- echo "xdg-su: filename '$file' does not have a proper vendor prefix" >&2
- echo 'A vendor prefix consists of alpha characters ([a-zA-Z]) and is terminated' >&2
- echo 'with a dash ("-"). An example filename is '"'example-$file'" >&2
- echo "Use --novendor to override or 'xdg-su --manual' for additional info." >&2
- exit 1
-}
-
-check_output_file()
-{
- # if the file exists, check if it is writeable
- # if it does not exists, check if we are allowed to write on the directory
- if [ -e "$1" ]; then
- if [ ! -w "$1" ]; then
- exit_failure_file_permission_write "no permission to write to file '$1'"
- fi
- else
- DIR=`dirname "$1"`
- if [ ! -w "$DIR" -o ! -x "$DIR" ]; then
- exit_failure_file_permission_write "no permission to create file '$1'"
- fi
- fi
-}
-
-#----------------------------------------
-# Checks for shared commands, e.g. --help
-
-check_common_commands()
-{
- while [ $# -gt 0 ] ; do
- parm="$1"
- shift
-
- case "$parm" in
- --help)
- usage
- echo "Use 'man xdg-su' or 'xdg-su --manual' for additional info."
- exit_success
- ;;
-
- --manual)
- manualpage
- exit_success
- ;;
-
- --version)
- echo "xdg-su 1.0beta2"
- exit_success
- ;;
- esac
- done
-}
-
-check_common_commands "$@"
-if [ ${XDG_UTILS_DEBUG_LEVEL-0} -lt 1 ]; then
- # Be silent
- xdg_redirect_output=" > /dev/null 2> /dev/null"
-else
- # All output to stderr
- xdg_redirect_output=" >&2"
-fi
-
-#--------------------------------------
-# Checks for known desktop environments
-# set variable DE to the desktop environments name, lowercase
-
-detectDE()
-{
- if [ x"$KDE_FULL_SESSION" = x"true" ]; then DE=kde;
- elif [ x"$GNOME_DESKTOP_SESSION_ID" != x"" ]; then DE=gnome;
- elif xprop -root _DT_SAVE_MODE | grep ' = \"xfce4\"$' >/dev/null 2>&1; then DE=xfce;
- elif [ x"$DESKTOP_SESSION" == x"LXDE" ]; then DE=lxde;
- fi
-}
-
-#----------------------------------------------------------------------------
-
-
-
-su_kde()
-{
- KDESU=`which kdesu 2>/dev/null`
- if [ $? -eq 0 ] ; then
- if [ -z "$user" ] ; then
- $KDESU -c "$cmd"
- else
- $KDESU -u "$user" -c "$cmd"
- fi
-
- if [ $? -eq 0 ]; then
- exit_success
- else
- exit_failure_operation_failed
- fi
- else
- su_generic
- fi
-}
-
-su_gnome()
-{
- GSU=`which gnomesu 2>/dev/null`
- if [ $? -ne 0 ] ; then
- GSU=`which xsu 2>/dev/null`
- fi
- if [ $? -eq 0 ] ; then
- if [ -z "$user" ] ; then
- $GSU -c "$cmd"
- else
- $GSU -u "$user" -c "$cmd"
- fi
-
- if [ $? -eq 0 ]; then
- exit_success
- else
- exit_failure_operation_failed
- fi
- else
- su_generic
- fi
-}
-
-su_generic()
-{
- if [ -z "$user" ] ; then
- xterm -geom 60x5 -T "xdg-su: $cmd" -e su -c "$cmd"
- else
- xterm -geom 60x5 -T "xdg-su: $cmd" -e su -u "$user" -c "$cmd"
- fi
-
- if [ $? -eq 0 ]; then
- exit_success
- else
- exit_failure_operation_failed
- fi
-}
-
-
-su_xfce()
-{
- if which gnomesu &>/dev/null ; then
- su_gnome
- else
- su_generic
- fi
-}
-
-su_lxde()
-{
- if which gnomesu &>/dev/null ; then
- su_gnome
- else
- su_generic
- fi
-}
-
-[ x"$1" != x"" ] || exit_failure_syntax
-
-user=
-cmd=
-while [ $# -gt 0 ] ; do
- parm="$1"
- shift
-
- case "$parm" in
- -u)
- if [ -z "$1" ] ; then
- exit_failure_syntax "user argument missing for -u"
- fi
- user="$1"
- shift
- ;;
-
- -c)
- if [ -z "$1" ] ; then
- exit_failure_syntax "command argument missing for -c"
- fi
- cmd="$1"
- shift
- ;;
-
- -*)
- exit_failure_syntax "unexpected option '$parm'"
- ;;
-
- *)
- exit_failure_syntax "unexpected argument '$parm'"
- ;;
- esac
-done
-
-if [ -z "${cmd}" ] ; then
- exit_failure_syntax "command missing"
-fi
-
-detectDE
-
-if [ x"$DE" = x"" ]; then
- which xterm 2>/dev/null >&2
- if [ $? -eq 0 -a -n "$DISPLAY" ] ; then
- DE=generic
- fi
-fi
-
-case "$DE" in
- kde)
- su_kde
- ;;
-
- gnome)
- su_gnome
- ;;
-
- generic)
- su_generic
- ;;
-
- xfce)
- su_xfce
- ;;
-
- lxde)
- su_lxde
- ;;
-
- *)
- [ x"$user" = x"" ] && user=root
- exit_failure_operation_impossible "no graphical method available for invoking '$cmd' as '$user'"
- ;;
-esac