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#!/bin/sh
# $Id: runasroot.sh $
## @file
# VirtualBox privileged execution helper script for Linux and Solaris
#
#
# Copyright (C) 2009-2022 Oracle and/or its affiliates.
#
# This file is part of VirtualBox base platform packages, as
# available from https://www.virtualbox.org.
#
# 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, in version 3 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, see <https://www.gnu.org/licenses>.
#
# SPDX-License-Identifier: GPL-3.0-only
#
# Deal with differing "which" semantics
mywhich() {
which "$1" 2>/dev/null | grep -v "no $1"
}
# Get the name and execute switch for a useful terminal emulator
#
# Sets $gxtpath to the emulator path or empty
# Sets $gxttitle to the "title" switch for that emulator
# Sets $gxtexec to the "execute" switch for that emulator
# May clobber $gtx*
# Calls mywhich
getxterm() {
# gnome-terminal uses -e differently to other emulators
for gxti in "konsole --title -e" "gnome-terminal --title -x" "xterm -T -e"; do
set $gxti
gxtpath="`mywhich $1`"
case "$gxtpath" in ?*)
gxttitle=$2
gxtexec=$3
return
;;
esac
done
}
# Quotes its argument by inserting '\' in front of every character save
# for 'A-Za-z0-9/'. Prints the result to stdout.
quotify() {
echo "$1" | sed -e 's/\([^a-zA-Z0-9/]\)/\\\1/g'
}
ostype=`uname -s`
if test "$ostype" != "Linux" && test "$ostype" != "SunOS" ; then
echo "Linux/Solaris not detected."
exit 1
fi
HAS_TERMINAL=""
case "$1" in "--has-terminal")
shift
HAS_TERMINAL="yes"
;;
esac
case "$#" in "2"|"3")
;;
*)
echo "Usage: `basename $0` DESCRIPTION COMMAND [ADVICE]" >&2
echo >&2
echo "Attempt to execute COMMAND with root privileges, displaying DESCRIPTION if" >&2
echo "possible and displaying ADVICE if possible if no su(1)-like tool is available." >&2
exit 1
;;
esac
DESCRIPTION=$1
COMMAND=$2
ADVICE=$3
PATH=$PATH:/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin:/usr/X11/bin
case "$ostype" in SunOS)
PATH=$PATH:/usr/sfw/bin:/usr/gnu/bin:/usr/xpg4/bin:/usr/xpg6/bin:/usr/openwin/bin:/usr/ucb
GKSU_SWITCHES="-au root"
;;
*)
GKSU_SWITCHES=""
;;
esac
case "$HAS_TERMINAL" in "")
case "$DISPLAY" in ?*)
KDESUDO="`mywhich kdesudo`"
case "$KDESUDO" in ?*)
eval "`quotify "$KDESUDO"` --comment `quotify "$DESCRIPTION"` -- $COMMAND"
exit
;;
esac
KDESU="`mywhich kdesu`"
case "$KDESU" in ?*)
"$KDESU" -c "$COMMAND"
exit
;;
esac
GKSU="`mywhich gksu`"
case "$GKSU" in ?*)
# Older gksu does not grok --description nor '--' and multiple args.
# @todo which versions do?
# "$GKSU" --description "$DESCRIPTION" -- "$@"
# Note that $GKSU_SWITCHES is NOT quoted in the following
"$GKSU" $GKSU_SWITCHES "$COMMAND"
exit
;;
esac
;;
esac # $DISPLAY
;;
esac # ! $HAS_TERMINAL
# pkexec may work for ssh console sessions as well if the right agents
# are installed. However it is very generic and does not allow for any
# custom messages. Thus it comes after gksu.
## @todo should we insist on either a display or a terminal?
# case "$DISPLAY$HAS_TERMINAL" in ?*)
PKEXEC="`mywhich pkexec`"
case "$PKEXEC" in ?*)
eval "\"$PKEXEC\" $COMMAND"
exit
;;
esac
# ;;S
#esac
case "$HAS_TERMINAL" in ?*)
USE_SUDO=
grep -q Ubuntu /etc/lsb-release 2>/dev/null && USE_SUDO=true
# On Ubuntu we need sudo instead of su. Assume this works, and is only
# needed for Ubuntu until proven wrong.
case $USE_SUDO in true)
SUDO_COMMAND="`quotify "$SUDO"` -- $COMMAND"
eval "$SUDO_COMMAND"
exit
;;
esac
SU="`mywhich su`"
case "$SU" in ?*)
"$SU" - root -c "$COMMAND"
exit
;;
esac
;;
esac
# The ultimate fallback is running 'su -' within an xterm. We use the
# title of the xterm to tell what is going on.
case "$DISPLAY" in ?*)
SU="`mywhich su`"
case "$SU" in ?*)
getxterm
case "$gxtpath" in ?*)
"$gxtpath" "$gxttitle" "$DESCRIPTION - su" "$gxtexec" su - root -c "$COMMAND"
exit
;;
esac
esac
esac # $DISPLAY
# Failure...
case "$DISPLAY" in ?*)
echo "Unable to locate 'pkexec', 'gksu' or 'su+xterm'. $ADVICE" >&2
;;
*)
echo "Unable to locate 'pkexec'. $ADVICE" >&2
;;
esac
exit 1
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