Hi, all. For at least a month or two I've noticed that FIONREAD
yields 1 byte on a freshly closed TCP connection, rather than 0.
The server creates a socket, binds to a port and listens and accepts
the first connection. It does a select(2) on the FD, and upon an input
event, calls ioctl(2) with FIONREAD. This yields 1 byte readable. Any
attempt to read that byte fails, as it's not really there.
The client connects, waits a second, then calls close(2). It doesn't
matter if the client writes some data (which the server reads), the
server still gets 1 byte readable when the connection closes. This
really doesn't seem right, since there is no data to read. Besides,
how else is the server to know that the "input" event is in fact a
closure (I can't use poll(2))?
2.3.99-pre4-2 still has this problem.
Regards,
Richard....
Permanent: rgooch@atnf.csiro.au
Current: rgooch@ras.ucalgary.ca
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