1 files changed, 47 insertions, 0 deletions
diff --git a/t/op/fork.t b/t/op/fork.t
index 11efa79d17..f3d74f978f 100755
--- a/t/op/fork.t
+++ b/t/op/fork.t
@@ -320,3 +320,50 @@ BEGIN {
 #print "outer\n"
 EXPECT
 inner
+########
+sub pipe_to_fork ($$) {
+    my $parent = shift;
+    my $child = shift;
+    pipe($child, $parent) or die;
+    my $pid = fork();
+    die "fork() failed: $!" unless defined $pid;
+    close($pid ? $child : $parent);
+    $pid;
+}
+
+if (pipe_to_fork('PARENT','CHILD')) {
+    # parent
+    print PARENT "pipe_to_fork\n";
+    close PARENT;
+}
+else {
+    # child
+    while (<CHILD>) { print; }
+    close CHILD;
+    exit;
+}
+
+sub pipe_from_fork ($$) {
+    my $parent = shift;
+    my $child = shift;
+    pipe($parent, $child) or die;
+    my $pid = fork();
+    die "fork() failed: $!" unless defined $pid;
+    close($pid ? $child : $parent);
+    $pid;
+}
+
+if (pipe_from_fork('PARENT','CHILD')) {
+    # parent
+    while (<PARENT>) { print; }
+    close PARENT;
+}
+else {
+    # child
+    print CHILD "pipe_from_fork\n";
+    close CHILD;
+    exit;
+}
+EXPECT
+pipe_from_fork
+pipe_to_fork