UNICOS/mk seems to still have this problem.

p4raw-id: //depot/perl@16698

diff --git a/ext/Socket/socketpair.t b/ext/Socket/socketpair.t
index be64dfb..fea1cb5 100644 (file)
--- a/ext/Socket/socketpair.t
+++ b/ext/Socket/socketpair.t
@@ -117,7 +117,7 @@ ok (shutdown(LEFT, SHUT_WR), "shutdown left for writing");
 {
   local $SIG{ALRM} = sub { warn "EOF on right took over 3 seconds" };
   local $TODO = "Known problems with unix sockets on $^O"
-      if $^O eq 'hpux'   || $^O eq 'super-ux';
+      if $^O eq 'hpux' || $^O eq 'super-ux' || $^O eq 'unicosmk';
   alarm 3;
   $! = 0;
   ok (eof RIGHT, "right is at EOF");