1 files changed, 60 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/link.c b/cpukit/libcsupport/src/link.c
new file mode 100644
index 0000000000..1cee54d0bf
--- /dev/null
+++ b/cpukit/libcsupport/src/link.c
@@ -0,0 +1,60 @@
+/*
+ *  link() - POSIX 1003.1b - 5.3.4 - Create a new link
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <rtems.h>
+#include <rtems/libio.h>
+#include <errno.h>
+
+#include "libio_.h"
+
+int link(
+  const char *existing,
+  const char *new
+)
+{
+  rtems_filesystem_location_info_t    existing_loc;
+  rtems_filesystem_location_info_t    parent_loc;
+  int                                 i;
+  int                                 result;
+  const char                         *name_start;
+
+  /*
+   * Get the node we are linking to.
+   */
+  result = rtems_filesystem_evaluate_path( existing, 0, &existing_loc, TRUE );
+  if ( result != 0 )
+     return -1;
+
+  /*
+   * Get the parent of the node we are creating.
+   */
+
+  rtems_filesystem_get_start_loc( new, &i, &parent_loc );
+  result = (*parent_loc.ops->evalformake)( &new[i], &parent_loc, &name_start );
+  if ( result != 0 )
+     set_errno_and_return_minus_one( result );
+
+  /*
+   *  Check to see if the caller is trying to link across file system
+   *  boundaries.
+   */
+
+  if ( parent_loc.mt_entry != existing_loc.mt_entry )
+    set_errno_and_return_minus_one( EXDEV );
+
+  if ( !parent_loc.ops->link )
+    set_errno_and_return_minus_one( ENOTSUP );
+
+  return (*parent_loc.ops->link)( &existing_loc, &parent_loc, name_start );
+}