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diff --git a/test/nptl/tst-signal4.c b/test/nptl/tst-signal4.c
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+/* Copyright (C) 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static int
+do_test (void)
+{
+ sigset_t ss;
+
+ sigemptyset (&ss);
+
+ int i;
+ for (i = 0; i < 10000; ++i)
+ {
+ long int r = random ();
+
+ if (r != SIG_BLOCK && r != SIG_SETMASK && r != SIG_UNBLOCK)
+ {
+ int e = pthread_sigmask (r, &ss, NULL);
+
+ if (e == 0)
+ {
+ printf ("pthread_sigmask succeeded for how = %ld\n", r);
+ exit (1);
+ }
+
+ if (e != EINVAL)
+ {
+ puts ("pthread_sigmask didn't return EINVAL");
+ exit (1);
+ }
+ }
+ }
+
+ return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"