# Take them one at a time, with and without the leading `-'.
for opt in $options; do
+ # `stty parenb' and `stty -parenb' fail with this message
+ # stty: standard input: unable to perform all requested operations
+ # on Linux 2.2.0-pre4 kernels, so skip those tests.
+ test $opt = parenb && continue
stty $opt || fail=1
+
+ # Likewise, `stty -cread' would fail, so skip that, too.
+ test $opt = cread && continue
rev=`eval echo "\\\$REV_$opt"`
if test -n "$rev"; then
- stty -$opt || fail=1
+ stty -$opt || { fail=1; echo -$opt; }
fi
done