One trick I've been using a lot recently that saves me from forgetting to check error codes is the judicious use of __attribute__((__warn_unused_result__)) on f

One trick I've been using a lot recently that saves me from forgetting to check error codes is the judicious use of __attribute__((__warn_unused_result__)) on functions that return an error code. It prevents you from being able to ignore the return value without doing something with it; even just assigning it to a variable and never checking the value in the variable isn't enough to silence the warning.