sh/tests/expansion/arith11.0

   1 # $FreeBSD: head/bin/sh/tests/expansion/arith11.0 218626 2011-02-12 23:44:05Z jilles $
   2 # Try to divide the smallest integer by -1.
   3 # On amd64 this causes SIGFPE, so make sure the shell checks.
   4
   5 # Calculate the minimum possible value, assuming two's complement and
   6 # a certain interpretation of overflow when shifting left.
   7 minint=1
   8 while [ $((minint <<= 1)) -gt 0 ]; do
   9         :
  10 done
  11 v=$( eval ': $((minint / -1))' 2>&1 >/dev/null)
  12 [ $? -ne 0 ] && [ -n "$v" ]