1: #!/bin/sh
   2: 
   3: background()
   4: {
   5:    sleep 10
   6:    echo "Background"
   7:    sleep 10
   8:    # Function will return here - if backgrounded, the subprocess will exit.
   9: }
  10: 
  11: echo "ps before background function"
  12: ps
  13: background &
  14: echo "My PID=$$"
  15: echo "Background function PID=$!"
  16: echo "ps after background function"
  17: ps
  18: exit 0