1 files changed, 94 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/link.c b/cpukit/libcsupport/src/link.c
new file mode 100644
index 0000000000..11b6521dea
--- /dev/null
+++ b/cpukit/libcsupport/src/link.c
@@ -0,0 +1,94 @@
+/*
+ *  link() - POSIX 1003.1b - 5.3.4 - Create a new link
+ *
+ *  COPYRIGHT (c) 1989-1999.
+ *  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 <rtems.h>
+#include <rtems/libio.h>
+#include <errno.h>
+
+#include <rtems/libio_.h>
+#include <rtems/seterr.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, strlen( 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_h)( &new[i], &parent_loc, &name_start );
+  if ( result != 0 ) {
+    rtems_filesystem_freenode( &existing_loc );
+    return -1;
+  }
+
+  /*
+   *  Check to see if the caller is trying to link across file system
+   *  boundaries.
+   */
+
+  if ( parent_loc.mt_entry != existing_loc.mt_entry ) {
+    rtems_filesystem_freenode( &existing_loc );
+    rtems_filesystem_freenode( &parent_loc );
+    rtems_set_errno_and_return_minus_one( EXDEV );
+  }
+
+  result = (*parent_loc.ops->link_h)( &existing_loc, &parent_loc, name_start );
+
+  rtems_filesystem_freenode( &existing_loc );
+  rtems_filesystem_freenode( &parent_loc );
+
+  return result;
+}
+
+/*
+ *  _link_r
+ *
+ *  This is the Newlib dependent reentrant version of link().
+ */
+
+#if defined(RTEMS_NEWLIB)
+
+#include <reent.h>
+
+int _link_r(
+  struct _reent *ptr __attribute__((unused)),
+  const char    *existing,
+  const char    *new
+)
+{
+  return link( existing, new );
+}
+#endif