[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: kern/43199: read(2) returns bad size in multithreaded programs
On Apr 23, 2010, at 7:55 AM, Wolfgang.Stukenbrock%nagler-company.com@localhost
> The problem seem to happen if multiple threads are reading from the
> same fd at the
> same time. This does not make much sence of cause, but if an
> application decides
> to such a thing, the kernel may not run wild.
That all depends on that sort of file descriptor it is and how you read from
it. If it is a regular file, the behavior is non-deterministic unless you use
pread(2). If it is a socket, correct behavior requires exclusive access to the
socket for the duration of the read(2) call.
However, I do agree that it should not return a value larger than the requested
Main Index |
Thread Index |