1 files changed, 54 insertions, 0 deletions
diff --git a/hurd/getdport.c b/hurd/getdport.c
new file mode 100644
index 0000000000..884deaa868
--- /dev/null
+++ b/hurd/getdport.c
@@ -0,0 +1,54 @@
+/* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <hurd.h>
+
+/* This is initialized in dtable.c when that gets linked in.
+   If dtable.c is not linked in, it will be zero.  */
+file_t (*_hurd_getdport_fn) (int fd);
+
+file_t
+__getdport (int fd)
+{
+  if (_hurd_getdport_fn)
+    /* dtable.c has defined the function to fetch a port from the real file
+       descriptor table.  */
+    return (*_hurd_getdport_fn) (fd);
+
+  /* getdport is the only use of file descriptors,
+     so we don't bother allocating a real table.  */
+
+  if (_hurd_init_dtable == NULL)
+    /* Never had a descriptor table.  */
+    return EBADF;
+
+  if (fd < 0 || fd > _hurd_init_dtablesize ||
+      _hurd_init_dtable[fd] == MACH_PORT_NULL)
+    {
+      errno = EBADF;
+      return MACH_PORT_NULL;
+    }
+  else      
+    {
+      __mach_port_mod_refs (__mach_task_self (), _hurd_init_dtable[fd],
+			    MACH_PORT_RIGHT_SEND, 1);
+      return _hurd_init_dtable[fd];
+    }
+}
+
+weak_alias (__getdport, getdport)