1 files changed, 56 insertions, 0 deletions
diff --git a/hurd/hurdchdir.c b/hurd/hurdchdir.c
new file mode 100644
index 0000000000..ce839a102f
--- /dev/null
+++ b/hurd/hurdchdir.c
@@ -0,0 +1,56 @@
+/* Change a port cell to a directory by looking up a name.
+   Copyright (C) 1999 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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <unistd.h>
+#include <hurd.h>
+#include <hurd/port.h>
+#include <hurd/fd.h>
+#include <fcntl.h>
+
+int
+_hurd_change_directory_port_from_name (struct hurd_port *portcell,
+				       const char *name)
+{
+  size_t len;
+  const char *lookup;
+  file_t dir;
+
+  /* Append trailing "/." to directory name to force ENOTDIR if it's not a
+     directory and EACCES if we don't have search permission.  */
+  len = strlen (name);
+  if (name[len - 2] == '/' && name[len - 1] == '.')
+    lookup = name;
+  else
+    {
+      char *n = alloca (len + 2);
+      memcpy (n, name, len);
+      n[len] = '/';
+      n[len + 1] = '.';
+      n[len + 2] = '\0';
+      lookup = n;
+    }
+
+  dir = __file_name_lookup (lookup, 0, 0);
+  if (dir == MACH_PORT_NULL)
+    return -1;
+
+  _hurd_port_set (portcell, dir);
+  return 0;
+}