/* 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)