xinit with automatic detection of X display number and virtual terminal

ekpxinit

#!/bin/bash

# TODO: test if the X server's -displayfd option for automatic detection of a
# free X display works

get_next_display_number() {
  local DISPLAY_NUM=0
  while [ $DISPLAY_NUM -lt 10 ]; do
    if [ -e /tmp/.X$DISPLAY_NUM-lock ]
    then
      let DISPLAY_NUM=$DISPLAY_NUM+1
    else
      echo $DISPLAY_NUM
      exit
    fi
  done
}

DISPLAY_NUM=$(get_next_display_number)
echo "Starting xinit on X display $DISPLAY_NUM and virtual terminal $XDG_VTNR."
echo "If it doesn't work, use the following command with another number after the colon:"
echo "\$ xinit -- :$DISPLAY_NUM vt$XDG_VTNR"
sleep 1
xinit -- :$DISPLAY_NUM vt$XDG_VTNR