/*----------------------------------------------------------------------
      Rename a file

  Args: tmpfname -- Old name of file
        fname    -- New name of file
 
 Result: File is renamed.  Returns 0 on success, else -1 on error
	 and errno is valid.
  ----*/
rename_file(tmpfname, fname)
    char *tmpfname, *fname;
{
    int status;

    (void) unlink(fname);
    if ((status = link(tmpfname, fname)) != 0)
        return(status);
    (void) unlink(tmpfname);
    return(0);
}