[glibc] tst-cancel4-common.c: fix calling socketpair

[glibc] tst-cancel4-common.c: fix calling socketpair

[Samuel Thibault]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b9ca3f3efb4659cadf4b0b81308ce9d45de61e0b

commit b9ca3f3efb4659cadf4b0b81308ce9d45de61e0b
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Fri Jun 26 22:44:30 2020 +0200

    tst-cancel4-common.c: fix calling socketpair
    
    PF_UNIX was actually never intended to be passed as protocol parameter to
    socket() calls: it is a protocol family, not a protocol.  It happens that
    Linux introduced accepting it during its 2.0 development, but it shouldn't.
    OpenBSD kernels accept it as well, but FreeBSD and NetBSD rightfully do not.
    GNU/Hurd does not either.
    
    * nptl/tst-cancel4-common.c (do_test): Pass 0 instead of PF_UNIX as
    protocol.

Diff:
---
 nptl/tst-cancel4-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nptl/tst-cancel4-common.c b/nptl/tst-cancel4-common.c
index f2026b81f4..9a6924c1c6 100644
--- a/nptl/tst-cancel4-common.c
+++ b/nptl/tst-cancel4-common.c
@@ -20,7 +20,7 @@
 static int
 do_test (void)
 {
-  if (socketpair (AF_UNIX, SOCK_STREAM, PF_UNIX, fds) != 0)
+  if (socketpair (AF_UNIX, SOCK_STREAM, 0, fds) != 0)
     {
       perror ("socketpair");
       exit (1);