1 echo "Backgrounded pipes shall have their stdin redirected to /dev/null"
3 # 1. bash does not redirect stdin to /dev/null if it is interactive.
4 # hush does it always (this is allowed by standards).
6 # 2. Failure will result in this script hanging
8 cat & wait; echo Zero:$?
10 # This does not work for bash! bash bug?
11 cat | cat & wait; echo Zero:$?