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    SubjectRe: Stray nulls when reading from AF_UNIX sockets
    On Thu, 06 Sep 2007 17:48:07 +0200 Anders Blomdell wrote:

    > Hi,
    >
    > With recent kernels (2.6.22.x), we are experiencing that random null characters
    > are read by our mySQL server (i.e. the number of bytes read by the server is
    > larger than the number of bytes written). I'm currently investigating the
    > problem (that occurs every 1-35 hours on a loaded system). A current suspect is
    > the following code in net/unix/af_unix.c:
    >
    > static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
    > struct msghdr *msg, size_t size,
    > int flags)
    > {
    > ...
    > return copied ? : err;
    > }
    >
    > Shouldn't this read:
    >
    > return copied ? copied : err;
    >
    > Or am I missing something?
    >
    > Please CC me personally.

    It's (?:) a gcc extension. See

    http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Conditionals.html#Conditionals

    ---
    ~Randy
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