Re: [Fwd: Re: How to detect is the socket is still open]

[Mladen Turk]

Ruediger Pluem wrote:

Reposting what I sent to Mladen in private. Just missed that
his address was in to and not dev@apr.apache.org :-)

OK. Here is the new code used in mod_jk
It works for the selected set of platforms
(windows, linux, solaris)

Any comments about other platforms?

int jk_is_socket_connected(jk_sock_t sock)
{
    fd_set fd;
    struct timeval tv;
    int rc;

    FD_ZERO(&fd);
    FD_SET(sock, &fd);

    /* Wait one microsecond */
    tv.tv_sec  = 0;
    tv.tv_usec = 1;

    do {
        rc = select((int)sock + 1, &fd, NULL, NULL, &tv);
#if defined(WIN32) || (defined(NETWARE) && defined(__NOVELL_LIBC__))
        errno = WSAGetLastError() - WSABASEERR;
#endif
    } while (rc == -1 && errno == EINTR);

    if (rc == 0) {
        /* If we get a timeout, then we are still connected */
        return 1;
    }
    else if (rc == 1) {
#if defined(WIN32) || (defined(NETWARE) && defined(__NOVELL_LIBC__))
        u_long nr;
        if (ioctlsocket(sock, FIONREAD, &nr) == 0) {
            return nr == 0 ? 0 : 1;
        }
#else
        int nr;
        if (ioctl(sock, FIONREAD, (void*)&nr) == 0) {
            return nr == 0 ? 0 : 1;
        }
#endif
    }

    return 0;
}