1 files changed, 67 insertions, 0 deletions
diff --git a/cpukit/posix/src/semunlink.c b/cpukit/posix/src/semunlink.c
new file mode 100644
index 0000000000..864749c6ac
--- /dev/null
+++ b/cpukit/posix/src/semunlink.c
@@ -0,0 +1,67 @@
+/*
+ *  COPYRIGHT (c) 1989-2007.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdarg.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <semaphore.h>
+#include <limits.h>
+
+#include <rtems/system.h>
+#include <rtems/score/object.h>
+#include <rtems/posix/semaphore.h>
+#include <rtems/posix/time.h>
+#include <rtems/seterr.h>
+
+/*PAGE
+ *
+ *  sem_unlink
+ *
+ *  Unlinks a named semaphore, sem_close must also be called to remove
+ *  the semaphore.
+ *
+ *  11.2.5 Remove a Named Semaphore, P1003.1b-1993, p.225
+ */
+
+int sem_unlink(
+  const char *name
+)
+{
+  int  status;
+  register POSIX_Semaphore_Control *the_semaphore;
+  sem_t                        the_semaphore_id;
+
+  _Thread_Disable_dispatch();
+
+  status = _POSIX_Semaphore_Name_to_id( name, &the_semaphore_id );
+  if ( status != 0 ) {
+    _Thread_Enable_dispatch();
+    rtems_set_errno_and_return_minus_one( status );
+  }
+
+  the_semaphore = (POSIX_Semaphore_Control *) _Objects_Get_local_object(
+    &_POSIX_Semaphore_Information,
+    _Objects_Get_index( the_semaphore_id )
+  );
+
+  the_semaphore->linked = false;
+  _POSIX_Semaphore_Namespace_remove( the_semaphore );
+  _POSIX_Semaphore_Delete( the_semaphore );
+
+  _Thread_Enable_dispatch();
+  return 0;
+}