I'm currently experimenting with a hybrid of this and K&R style, that would look like this:

  while ((len = getline(line, MAXLINE)) > 0)
      if (len > max) {
          max = len;
          copy(longest, line);
          }
    
      if (max > 0) /* there was a line */
          printf("%s", longest);

So far I'm finding that it gives good readability, doesn't waste too many lines on braces, and doesn't run into many issues of accidentally leaving braces out.

I started it after having started writing lisp and python, and I'm getting used to just ignoring the braces and going by indentation, which this style emphasises.