17.5.3. Random Access to a Stream
The various stream types generally support random access to the data in their associated stream. We can reposition the stream so that it skips around, reading first the last line, then the first, and so on. The library provides a pair of functions to seek to a given location and to tell the current location in the associated stream.
Random IO is an inherently system-dependent. To understand how to use these features, you must consult your system’s documentation.
Although these seek and tell functions are defined for all the stream types, whether they do anything useful depends on the device to which the ...