code.delx.au - monosys/blob - bin/xuserrun

   1 #!/bin/bash
   2 # vim:ts=2:sts=2:sw=2
   3
   4 #
   5 # Run a command as the currently active X11 user
   6 #
   7
   8 seat="seat0"
   9
  10 # determine location of loginctl
  11 LOGINCTL=$(command -v loginctl || command -v systemd-loginctl)
  12 if [[ -e LOGINCTL ]]; then
  13   echo "Error: Unable to find loginctl executable"
  14   exit 1
  15 fi
  16
  17 get_session_info() {
  18   local session="$1"
  19   local varname="$2"
  20   local IFS=$'\n'
  21   eval declare -Ag $varname
  22   for row in $(loginctl show-session "$session"); do
  23     key="$(echo "${row}"|cut -d= -f1)"
  24     val="$(echo "${row}"|cut -d= -f2-)"
  25     eval ${varname}[\"${key}\"]=\"${val}\"
  26   done
  27 }
  28
  29 escape() {
  30   for arg in "$@" ; do
  31     printf "%q " "$arg";
  32   done;
  33 }
  34
  35 session_list="$(loginctl --no-legend | grep "$seat" | awk '{print $1}')"
  36 found_active_session=""
  37 for session in $session_list; do
  38   get_session_info "$session" session_info
  39   if [[ "${session_info[Active]}" = "yes" ]]; then
  40     found_active_session="yes"
  41     break
  42   fi
  43 done
  44 if [ -z "${found_active_session}" ]; then
  45   echo "Error: Unable to determine active session"
  46   exit 1
  47 fi
  48
  49 if [[ "${session_info[Type]}" != "x11" ]]; then
  50   echo "Error: Active session is not x11"
  51   exit 2
  52 fi
  53
  54 current_user="$(id -u -n)"
  55
  56 if [[ ${current_user} == ${session_info[Name]} ]]; then
  57   # already correct user, no need to su
  58   DISPLAY="${session_info[Display]}" "$@"
  59 else
  60   # run command as user
  61   DISPLAY="${session_info[Display]}" su -c - "${session_info[Name]}" "$(escape "$@")"
  62 fi