3 # The construct ${#?} is ambiguous in POSIX.1-2008: it could be the length
4 # of $? or it could be $# giving an error in the (impossible) case that it
6 # We use the former interpretation; it seems more useful.
9 [ "${#?}" = 1 ] || echo '${#?} wrong'
11 [ "${#?}" = 2 ] || echo '${#?} wrong'