If count is greater than SSIZE_MAX, the result is unspecified.RETURN VALUEOn success, the number of bytes read is returned (zero indicates end of file), and the file position is advanced by this number. It is not an error if this number is smaller than the number of bytes requested. . . .
So put the corn in the oven however you choose to, and set the timer for 30 minutes. Oh how I love the smell of the corn cooking this way. A real roasted smell. After 30 minutes, remove the corn from the oven.
Reserve about 1/2 of the butter. Spread remaining butter on the whole ear of corn. Sprinkle liberally with salt and pepper (I use about 1 teaspoon of each). Bake for 30-45 minutes, until starting to brown. Turn corn occasionally. Remove from oven and spread remaining butter over the top of the corn.