1 | #!/bin/sh
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2 | # $Id: runasroot.sh 96407 2022-08-22 17:43:14Z vboxsync $
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3 | ## @file
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4 | # VirtualBox privileged execution helper script for Linux and Solaris
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5 | #
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6 |
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7 | #
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8 | # Copyright (C) 2009-2022 Oracle and/or its affiliates.
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9 | #
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10 | # This file is part of VirtualBox base platform packages, as
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11 | # available from https://www.virtualbox.org.
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12 | #
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13 | # This program is free software; you can redistribute it and/or
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14 | # modify it under the terms of the GNU General Public License
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15 | # as published by the Free Software Foundation, in version 3 of the
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16 | # License.
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17 | #
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18 | # This program is distributed in the hope that it will be useful, but
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19 | # WITHOUT ANY WARRANTY; without even the implied warranty of
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20 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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21 | # General Public License for more details.
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22 | #
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23 | # You should have received a copy of the GNU General Public License
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24 | # along with this program; if not, see <https://www.gnu.org/licenses>.
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25 | #
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26 | # SPDX-License-Identifier: GPL-3.0-only
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27 | #
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28 |
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29 | # Deal with differing "which" semantics
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30 | mywhich() {
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31 | which "$1" 2>/dev/null | grep -v "no $1"
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32 | }
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33 |
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34 | # Get the name and execute switch for a useful terminal emulator
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35 | #
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36 | # Sets $gxtpath to the emulator path or empty
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37 | # Sets $gxttitle to the "title" switch for that emulator
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38 | # Sets $gxtexec to the "execute" switch for that emulator
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39 | # May clobber $gtx*
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40 | # Calls mywhich
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41 | getxterm() {
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42 | # gnome-terminal uses -e differently to other emulators
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43 | for gxti in "konsole --title -e" "gnome-terminal --title -x" "xterm -T -e"; do
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44 | set $gxti
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45 | gxtpath="`mywhich $1`"
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46 | case "$gxtpath" in ?*)
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47 | gxttitle=$2
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48 | gxtexec=$3
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49 | return
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50 | ;;
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51 | esac
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52 | done
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53 | }
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54 |
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55 | # Quotes its argument by inserting '\' in front of every character save
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56 | # for 'A-Za-z0-9/'. Prints the result to stdout.
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57 | quotify() {
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58 | echo "$1" | sed -e 's/\([^a-zA-Z0-9/]\)/\\\1/g'
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59 | }
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60 |
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61 | ostype=`uname -s`
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62 | if test "$ostype" != "Linux" && test "$ostype" != "SunOS" ; then
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63 | echo "Linux/Solaris not detected."
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64 | exit 1
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65 | fi
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66 |
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67 | HAS_TERMINAL=""
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68 | case "$1" in "--has-terminal")
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69 | shift
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70 | HAS_TERMINAL="yes"
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71 | ;;
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72 | esac
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73 |
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74 | case "$#" in "2"|"3")
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75 | ;;
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76 | *)
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77 | echo "Usage: `basename $0` DESCRIPTION COMMAND [ADVICE]" >&2
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78 | echo >&2
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79 | echo "Attempt to execute COMMAND with root privileges, displaying DESCRIPTION if" >&2
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80 | echo "possible and displaying ADVICE if possible if no su(1)-like tool is available." >&2
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81 | exit 1
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82 | ;;
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83 | esac
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84 |
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85 | DESCRIPTION=$1
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86 | COMMAND=$2
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87 | ADVICE=$3
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88 | PATH=$PATH:/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin:/usr/X11/bin
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89 |
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90 | case "$ostype" in SunOS)
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91 | PATH=$PATH:/usr/sfw/bin:/usr/gnu/bin:/usr/xpg4/bin:/usr/xpg6/bin:/usr/openwin/bin:/usr/ucb
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92 | GKSU_SWITCHES="-au root"
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93 | ;;
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94 | *)
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95 | GKSU_SWITCHES=""
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96 | ;;
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97 | esac
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98 |
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99 | case "$HAS_TERMINAL" in "")
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100 | case "$DISPLAY" in ?*)
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101 | KDESUDO="`mywhich kdesudo`"
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102 | case "$KDESUDO" in ?*)
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103 | eval "`quotify "$KDESUDO"` --comment `quotify "$DESCRIPTION"` -- $COMMAND"
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104 | exit
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105 | ;;
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106 | esac
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107 |
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108 | KDESU="`mywhich kdesu`"
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109 | case "$KDESU" in ?*)
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110 | "$KDESU" -c "$COMMAND"
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111 | exit
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112 | ;;
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113 | esac
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114 |
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115 | GKSU="`mywhich gksu`"
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116 | case "$GKSU" in ?*)
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117 | # Older gksu does not grok --description nor '--' and multiple args.
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118 | # @todo which versions do?
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119 | # "$GKSU" --description "$DESCRIPTION" -- "$@"
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120 | # Note that $GKSU_SWITCHES is NOT quoted in the following
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121 | "$GKSU" $GKSU_SWITCHES "$COMMAND"
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122 | exit
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123 | ;;
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124 | esac
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125 | ;;
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126 | esac # $DISPLAY
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127 | ;;
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128 | esac # ! $HAS_TERMINAL
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129 |
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130 | # pkexec may work for ssh console sessions as well if the right agents
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131 | # are installed. However it is very generic and does not allow for any
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132 | # custom messages. Thus it comes after gksu.
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133 | ## @todo should we insist on either a display or a terminal?
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134 | # case "$DISPLAY$HAS_TERMINAL" in ?*)
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135 | PKEXEC="`mywhich pkexec`"
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136 | case "$PKEXEC" in ?*)
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137 | eval "\"$PKEXEC\" $COMMAND"
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138 | exit
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139 | ;;
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140 | esac
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141 | # ;;S
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142 | #esac
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143 |
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144 | case "$HAS_TERMINAL" in ?*)
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145 | USE_SUDO=
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146 | grep -q Ubuntu /etc/lsb-release 2>/dev/null && USE_SUDO=true
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147 | # On Ubuntu we need sudo instead of su. Assume this works, and is only
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148 | # needed for Ubuntu until proven wrong.
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149 | case $USE_SUDO in true)
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150 | SUDO_COMMAND="`quotify "$SUDO"` -- $COMMAND"
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151 | eval "$SUDO_COMMAND"
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152 | exit
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153 | ;;
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154 | esac
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155 |
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156 | SU="`mywhich su`"
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157 | case "$SU" in ?*)
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158 | "$SU" - root -c "$COMMAND"
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159 | exit
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160 | ;;
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161 | esac
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162 | ;;
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163 | esac
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164 |
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165 | # The ultimate fallback is running 'su -' within an xterm. We use the
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166 | # title of the xterm to tell what is going on.
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167 | case "$DISPLAY" in ?*)
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168 | SU="`mywhich su`"
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169 | case "$SU" in ?*)
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170 | getxterm
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171 | case "$gxtpath" in ?*)
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172 | "$gxtpath" "$gxttitle" "$DESCRIPTION - su" "$gxtexec" su - root -c "$COMMAND"
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173 | exit
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174 | ;;
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175 | esac
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176 | esac
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177 | esac # $DISPLAY
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178 |
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179 | # Failure...
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180 | case "$DISPLAY" in ?*)
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181 | echo "Unable to locate 'pkexec', 'gksu' or 'su+xterm'. $ADVICE" >&2
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182 | ;;
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183 | *)
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184 | echo "Unable to locate 'pkexec'. $ADVICE" >&2
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185 | ;;
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186 | esac
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187 |
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188 | exit 1
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