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

   1 #!/bin/bash
   2
   3 #
   4 # Run a command as the currently active X11 user
   5 #
   6
   7 seat="seat0"
   8
   9 # determine location of loginctl
  10 LOGINCTL=$(command -v loginctl || command -v systemd-loginctl)
  11 if [[ -e LOGINCTL ]]; then
  12 echo "Error: Unable to find loginctl executable"
  13   exit 1
  14 fi
  15
  16 get_session_info() {
  17   local session="$1"
  18   local varname="$2"
  19   local IFS=$'\n'
  20   eval declare -Ag $varname
  21   for row in $(loginctl show-session "$session"); do
  22     key="$(echo "${row}"|cut -d= -f1)"
  23     val="$(echo "${row}"|cut -d= -f2-)"
  24     eval ${varname}[\"${key}\"]=\"${val}\"
  25   done
  26 }
  27
  28 escape() {
  29   for arg in "$@" ; do
  30     printf "%q " "$arg";
  31   done;
  32 }
  33
  34 active_session="$(loginctl show-seat ${seat}|grep ActiveSession|cut -d= -f2)"
  35 if [[ $? -ne 0 || -z $active_session ]]; then
  36 echo "Error: Unable to determine active session"
  37   exit 1
  38 fi
  39
  40 get_session_info $active_session session_info
  41
  42 if [[ ${session_info[Type]} != "x11" ]]; then
  43 echo "Error: Active session is not x11"
  44   exit 2
  45 fi
  46
  47 current_user="$(id -u -n)"
  48
  49 if [[ ${current_user} == ${session_info[Name]} ]]; then
  50   # already correct user, no need to su
  51   DISPLAY="${session_info[Display]}" "$@"
  52 else
  53   # run command as user
  54   DISPLAY="${session_info[Display]}" su -c - "${session_info[Name]}" "$(escape "$@")"
  55 fi