shell: sync redir/* tests

Note: hush-redir/redir_to_bad_fd.tests currently fails

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-redir/redir5.right b/shell/ash_test/ash-redir/redir5.right
new file mode 100644
index 0000000..52cce4f
--- /dev/null
+++ b/shell/ash_test/ash-redir/redir5.right
@@ -0,0 +1,4 @@
+Backgrounded pipes shall have their stdin redirected to /dev/null
+Zero:0
+Zero:0
+Done
diff --git a/shell/ash_test/ash-redir/redir5.tests b/shell/ash_test/ash-redir/redir5.tests
new file mode 100755
index 0000000..957f9c8
--- /dev/null
+++ b/shell/ash_test/ash-redir/redir5.tests
@@ -0,0 +1,13 @@
+echo "Backgrounded pipes shall have their stdin redirected to /dev/null"
+
+# 1. bash does not redirect stdin to /dev/null if it is interactive.
+# hush does it always (this is allowed by standards).
+
+# 2. Failure will result in this script hanging
+
+cat & wait; echo Zero:$?
+
+# This does not work for bash! bash bug?
+cat | cat & wait; echo Zero:$?
+
+echo Done