labbott@andrew$ ./runtrace -f trace05.txt 
#
# trace05.txt - Run a background job.
#
tsh> ./myspin1 &
[1] (9730) ./myspin1 &
tsh> quit
labbott@andrew$ ./runtrace -f trace05.txt 
#
# trace05.txt - Run a background job.
#
tsh> ./myspin1 &
[1] (9737) ./myspin1 &