Object containing information to specify a position within a file
This type of object is used to specify a position within a file. An object of this type is capable of specifying uniquely any position within a file.

The information in fpos_t objects is usually filled by a call to fgetpos, which takes a pointer to an object of this type as argument.

The content of an fpos_t object is not meant to be read directly, but only to be used as an argument in a call to fsetpos.