rem: get_link_name (const char *filename, struct fileinfo *f)
add: get_link_name (char const *filename, struct fileinfo *f, bool command_line_arg)
context: get_link_name (const char *filename, struct fileinfo *f){  f->linkname = xreadlink (filename);  if (f->linkname == NULL)    {      error (0, errno, _("cannot read symbolic link %s"),	     quotearg_colon (filename));      exit_status = 1;    }}