1 files changed, 111 insertions, 0 deletions
diff --git a/sysdeps/pthread/tst-sem7.c b/sysdeps/pthread/tst-sem7.c
new file mode 100644
index 0000000000..80f566f787
--- /dev/null
+++ b/sysdeps/pthread/tst-sem7.c
@@ -0,0 +1,111 @@
+/* Copyright (C) 2003-2020 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, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <semaphore.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+
+static void
+remove_sem (int status, void *arg)
+{
+  sem_unlink (arg);
+}
+
+
+static int
+do_test (void)
+{
+  sem_t *s;
+  sem_t *s2;
+  sem_t *s3;
+
+  s = sem_open ("/glibc-tst-sem7", O_CREAT, 0600, 1);
+  if (s == SEM_FAILED)
+    {
+      if (errno == ENOSYS)
+	{
+	  puts ("sem_open not supported.  Oh well.");
+	  return 0;
+	}
+
+      /* Maybe the shm filesystem has strict permissions.  */
+      if (errno == EACCES)
+	{
+	  puts ("sem_open not allowed.  Oh well.");
+	  return 0;
+	}
+
+      printf ("sem_open: %m\n");
+      return 1;
+    }
+
+  on_exit (remove_sem, (void *) "/glibc-tst-sem7");
+
+  /* We have the semaphore object.  Now try again.  We should get the
+     same address.  */
+  s2 = sem_open ("/glibc-tst-sem7", O_CREAT, 0600, 1);
+  if (s2 == SEM_FAILED)
+    {
+      puts ("2nd sem_open failed");
+      return 1;
+    }
+  if (s != s2)
+    {
+      puts ("2nd sem_open didn't return the same address");
+      return 1;
+    }
+
+  /* And again, this time without O_CREAT.  */
+  s3 = sem_open ("/glibc-tst-sem7", 0);
+  if (s3 == SEM_FAILED)
+    {
+      puts ("3rd sem_open failed");
+      return 1;
+    }
+  if (s != s3)
+    {
+      puts ("3rd sem_open didn't return the same address");
+      return 1;
+    }
+
+  /* Now close the handle.  Three times.  */
+  if (sem_close (s2) != 0)
+    {
+      puts ("1st sem_close failed");
+      return 1;
+    }
+  if (sem_close (s) != 0)
+    {
+      puts ("2nd sem_close failed");
+      return 1;
+    }
+  if (sem_close (s3) != 0)
+    {
+      puts ("3rd sem_close failed");
+      return 1;
+    }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"