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.
1 Stir into the butter mixture along with the lime juice and hot sauce until evenly blended. Brush the ears of corn generously with the garlic butter; reserve remaining butter.  Cook the corn on the preheated grill, rotating occasionally until the corn is hot and tender, 10 to 15 minutes.