What is a good programming pattern for handling return values from stdio file writing functions

Question

I\'m working on some code that generates a lot of

ignoring return value of ‘size_t fwrite(const void*, size_t, size_t, FILE*)’, declared with attribute warn         


        

Answer 1

Your first solution looks ok. Usually a goto err; comes in more handy as you may need some common cleanup part (such as rewinding to a known position).

To make GCC quiet just do:

(void)fwrite (&blah, sizeof (blah), 1, fp);
(void)fwrite (&foo, sizeof (foo), 1, fp);