Re: How to tell how much to expect from a fd

Eric Lammerts (eric@lammerts.org)
Thu, 28 Mar 2002 14:27:52 +0100 (CET)

On 27 Mar 2002, Mark Atwood wrote:

> Does there exist a fcntl or some other way to tell how much data is
> "ready to be read" from a fd?

int val;
ioctl(fd, FIONREAD, &val);

See tcp(7).

Eric

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