shell scripting

sup

im using 'exit 1' in a 'case' construct.
im also using 'trap' to delete some tmp data.
the problem is, that 'trap' isn't triggered by 'exit 1'. trap works though if i send ctrl-z.
why is that?
btw, my trap:
trap "rm $TMP; exit 1" 1 2 15

>>1
Why would trap trap exit 1? Trap traps signals. Exit does not send a signal; it just exits.

Better way is to define an error handler.

function cleanup {
  rm -f $TMP
}
function errorexit {
  cleanup
  exit 1
}
trap errorexit SIGHUP SIGINT SIGTERM

Now call errorexit instead of exit 1.