Using fseek with a file pointer that points to stdin

Question

Depending on command-line arguments, I\'m setting a file pointer to point either towards a specified file or stdin (for the purpose of piping). I then pass this pointer arou

Answer 1

Here is the relevant entry in the ANSI standard concerning the fseek function:

For a text stream, either offset shall be zero, or offset shall be a value returned by an earlier successful call to the ftell function on a stream associated with the same file and whence shall be SEEK_SET

So, possible but with some limitations