xwin-tools/xdpy-attach

   1 #!/bin/bash
   2
   3 # source up this script to setup new DISPLAY
   4 # environent in the current session
   5
   6 _xdpy_attach_find_display()
   7 {
   8         declare -A confirm_xdpy_pid
   9
  10         local signal
  11         for signal in INT QUIT TERM
  12         do
  13                 trap "kill -SIG$signal -- \${!confirm_xdpy_pid[@]} 2>/dev/null" $signal
  14         done
  15         trap "kill -SIGINT -- \${!confirm_xdpy_pid[@]} 2>/dev/null" EXIT
  16
  17         for dpy in `xdpys`
  18         do
  19                 echo "Found Display - $dpy" >&2
  20                 DISPLAY=$dpy zenity --question --text="Is this the right Display?\n$dpy" </dev/null >/dev/null 2>&1 &
  21                 confirm_xdpy_pid[$!]=$dpy
  22         done
  23         unset dpy
  24
  25         local check_pid
  26         echo "Waiting for user to response ..." >&2
  27
  28         while [ ${#confirm_xdpy_pid[@]} -gt 0 ]
  29         do
  30                 for check_pid in "${!confirm_xdpy_pid[@]}"
  31                 do
  32                         if ! kill -0 "$check_pid" 2>/dev/null
  33                         then
  34                                 local dpy=${confirm_xdpy_pid[$check_pid]}
  35                                 unset confirm_xdpy_pid[$check_pid]
  36
  37                                 wait $check_pid
  38                                 if [ $? = 0 ]
  39                                 then
  40                                         echo "$dpy"
  41                                         break 2
  42                                 fi
  43                         fi
  44                 done
  45                 # Ctrl-C is most likely got by sleep, if so, exit from the loop.
  46                 sleep 0.4 || break
  47         done
  48         unset check_pid
  49
  50         kill -SIGINT -- ${!confirm_xdpy_pid[@]} 2>/dev/null
  51         unset confirm_xdpy_pid
  52 }
  53
  54 _xdpy_attach_apply()
  55 {
  56         if _xdpy_attach_is_shell_source
  57         then
  58                 export $1=$2
  59         else
  60                 echo export $1=$2
  61         fi
  62 }
  63
  64 _xdpy_attach_is_shell_source()
  65 {
  66         [ "$0" != "$BASH_SOURCE" ]
  67 }
  68
  69 _xdpy_attach_screen_setenv()
  70 {
  71         if [ -n "$STY" ]
  72         then
  73                 echo "Setting Gnu/Screen env $1" >&2
  74                 screen -S "$STY" -X setenv "$1" "$2"
  75         fi
  76 }
  77
  78
  79 echo "current DISPLAY=$DISPLAY" >&2
  80 dpy=`_xdpy_attach_find_display`
  81 if [ -n "$dpy" ]
  82 then
  83         echo "Setting DISPLAY to '$dpy'" >&2
  84         _xdpy_attach_apply DISPLAY "$dpy"
  85
  86         _xdpy_attach_screen_setenv DISPLAY "$dpy"
  87
  88         dbus=`DISPLAY="$dpy" xprop -root DBUS_SESSION_BUS_ADDRESS | cut -s -f2- -d= | cut -f2 -d'"'`
  89         dbus=${dbus// /}
  90         if [ -n "$dbus" ]
  91         then
  92                 echo "Setting DBUS_SESSION_BUS_ADDRESS to '$dbus'" >&2
  93                 _xdpy_attach_apply DBUS_SESSION_BUS_ADDRESS "$dbus"
  94
  95                 _xdpy_attach_screen_setenv DBUS_SESSION_BUS_ADDRESS "$dbus"
  96         fi
  97
  98         if [ -n "$1" ]
  99         then
 100                 env DISPLAY="$dpy" ${dbus:+DBUS_SESSION_BUS_ADDRESS="$dbus"} "$@"
 101         fi
 102
 103         unset dbus
 104 fi
 105 unset dpy