Re: C90 fpeek

On 2025-01-24, Chris M. Thomasson <chris.m.thomasson.1@gmail.com> wrote:

On 1/24/2025 11:48 AM, Kaz Kylheku wrote:

Unless you non-portably arranged otherwise. E.g. on POSIX
we can get the fileno(stream), and use fcntl to set up O_NONBLOCK.
Then get(stream) returns EOF, with errno set to EWOULDBLOCK
and we whave to clearerr(stream), then poll the fd, and so it goes.
>
Been there done that. Went back there, done that again,
and then several more times, like a raging masochist.

>
Why not use AIO?

 In conjunction with stdio buffering? It doesn't seem possible; you have
to go through alternative functions like aio_read, which stdio doesn't
interface with.

 A stdio implementation that uses aio_read and friends under the hood
might be interesting.