1 files changed, 65 insertions, 0 deletions
diff --git a/libc/sysdeps/mach/hurd/readlink.c b/libc/sysdeps/mach/hurd/readlink.c
new file mode 100644
index 000000000..f95b6c0b8
--- /dev/null
+++ b/libc/sysdeps/mach/hurd/readlink.c
@@ -0,0 +1,65 @@
+/* Copyright (C) 1991,92,93,94,95,97,2002 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <unistd.h>
+#include <hurd.h>
+#include <hurd/paths.h>
+#include <fcntl.h>
+#include <string.h>
+
+/* Read the contents of the symbolic link FILE_NAME into no more than
+   LEN bytes of BUF.  The contents are not null-terminated.
+   Returns the number of characters read, or -1 for errors.  */
+ssize_t
+__readlink (file_name, buf, len)
+     const char *file_name;
+     char *buf;
+     size_t len;
+{
+  error_t err;
+  file_t file;
+  struct stat64 st;
+
+  file = __file_name_lookup (file_name, O_READ | O_NOLINK, 0);
+  if (file == MACH_PORT_NULL)
+    return -1;
+
+  err = __io_stat (file, &st);
+  if (! err)
+    if (S_ISLNK (st.st_mode))
+      {
+	char *rbuf = buf;
+
+	err = __io_read (file, &rbuf, &len, 0, len);
+	if (!err && rbuf != buf)
+	  {
+	    memcpy (buf, rbuf, len);
+	    __vm_deallocate (__mach_task_self (), (vm_address_t)rbuf, len);
+	  }
+      }
+    else
+      err = EINVAL;
+
+  __mach_port_deallocate (__mach_task_self (), file);
+
+  if (err)
+    return __hurd_fail (err);
+  else
+    return len;
+}
+weak_alias (__readlink, readlink)