extract common shell fns in tests

tests/jffs2/test.nix

@@ -15,29 +15,6 @@ in pkgs.runCommand "check" {
     socat
   ] ;
 } ''
-serverstatedir=$(mktemp -d -t routeros-XXXXXX)
-
-killpid(){
-  if test -e $1 && test -d /proc/`cat $1` ; then
-    pid=$(cat $1)
-    kill $pid
-  fi
-}
-
-cleanup(){
-  killpid $serverstatedir/pid
-  test -n "$MPLCONFIGDIR" && test -d "$MPLCONFIGDIR" && rm -rf "$MPLCONFIGDIR"
-  killpid foo.pid
-}
-trap cleanup EXIT
-
-fatal(){
-  err=$?
-  echo "FAIL: command $(eval echo $BASH_COMMAND) exited with code $err"
-  exit $err
-}
-trap fatal ERR
-
 mkdir vm
 mips-vm --background ./vm ${img}/vmlinux ${img}/rootfs
 expect ${./script.expect} >$out