Hi, Looking at the code for sock_no_fcntl() in net/core.c, I cannot specify "0" as a value for F_SETOWN, unless I'm the superuser. I believe this to be a bug, it stops de-registering an interest in SIGURG signals. Let me know if you want a patch. Cheers Chris - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/