1 files changed, 147 insertions, 0 deletions
diff --git a/nptl/tst-sem4.c b/nptl/tst-sem4.c
new file mode 100644
index 0000000000..ccffbdd779
--- /dev/null
+++ b/nptl/tst-sem4.c
@@ -0,0 +1,147 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   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 <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);
+}
+
+
+int
+main (void)
+{
+  sem_t *s;
+  sem_t *s2;
+  pid_t pid;
+  int val;
+
+  s = sem_open ("/glibc-tst-sem4", 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-sem4");
+
+  /* We have the semaphore object.  Now try again with O_EXCL, this
+     should fail.  */
+  s2 = sem_open ("/glibc-tst-sem4", O_CREAT | O_EXCL, 0600, 1);
+  if (s2 != SEM_FAILED)
+    {
+      puts ("2nd sem_open didn't fail");
+      return 1;
+    }
+  if (errno != EEXIST)
+    {
+      puts ("2nd sem_open returned wrong error");
+      return 1;
+    }
+
+  /* Check the value.  */
+  if (sem_getvalue (s, &val) == -1)
+    {
+      puts ("getvalue failed");
+      return 1;
+    }
+  if (val != 1)
+    {
+      printf ("initial value wrong: got %d, expected 1\n", val);
+      return 1;
+    }
+
+  if (TEMP_FAILURE_RETRY (sem_wait (s)) == -1)
+    {
+      puts ("1st sem_wait failed");
+      return 1;
+    }
+
+  pid = fork ();
+  if (pid == -1)
+    {
+      printf ("fork failed: %m\n");
+      return 1;
+    }
+
+  if (pid == 0)
+    {
+      /* Child.  */
+
+      /* Check the value.  */
+      if (sem_getvalue (s, &val) == -1)
+	{
+	  puts ("child: getvalue failed");
+	  return 1;
+	}
+      if (val != 0)
+	{
+	  printf ("child: value wrong: got %d, expect 0\n", val);
+	  return 1;
+	}
+
+      if (sem_post (s) == -1)
+	{
+	  puts ("child: post failed");
+	  return 1;
+	}
+    }
+  else
+    {
+      if (TEMP_FAILURE_RETRY (sem_wait (s)) == -1)
+	{
+	  puts ("2nd sem_wait failed");
+	  return 1;
+	}
+
+      if (sem_getvalue (s, &val) == -1)
+	{
+	  puts ("parent: 2nd getvalue failed");
+	  return 1;
+	}
+      if (val != 0)
+	{
+	  printf ("parent: value wrong: got %d, expected 0\n", val);
+	  return 1;
+	}
+    }
+
+  return 0;
+}