How to flush output to disk?

[Conor P. Cahill]

In article <333 at charyb.COM>, dan at charyb.COM (Dan Mick) writes:
> fflush()?  You've gotta do that more than once.  Why not add a 
> setbuf(stdout, NULL) to the top of the file?  Quick, easy, simple.

except that it is much more ineffecient unless you plan to call fflush() after
*every* putc()/fprintf()/fputs().
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