The '3' is the manual page section ("library calls") where the function is documented... :)   (an old unix convention — typically, I avoid using it for just that reason... sorry I didn't in this case).

I guess that's likely to work on other operating systems as well ?

Yes I'd think so, it's a pretty standard library call (ANSI C - X3.159-1989, the man page says).

In reply to Re^5: [OT]: Flushing XS buffers portably by almut
in thread [OT]: Flushing XS buffers portably by syphilis

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