title: How in portable C to seek forward when reading from a pipe
body: <p>Since <code>fseek()</code> does not work on pipes what methods exist for simulating seeking forward? The naive approach is to use <code>fread()</code> and throw away the contents read into the memory buffer. For huge seeks to avoid huge buffers you would use the same buffer over and over with the final read using just a part of the buffer.</p>
  
  <p>But is this the only approach? Is there another way which avoids the buffer and the potential multiple read?</p>