Is there a way to check if process is 64 bit or 32 bit?
int is64bit = proc->kp_proc.p_flags & P_LP64;

static int
B_get_process_info(pid_t pid, struct kinfo_proc *kp)
{
    size_t bufsize      = 0;
    size_t orig_bufsize = 0;
    int    retry_count  = 0;
    int    local_error  = 0;
    int    mib[4]       = { CTL_KERN, KERN_PROC, KERN_PROC_PID, 0 };

    mib[3] = pid;
    orig_bufsize = bufsize = sizeof(struct kinfo_proc);

    for (retry_count = 0; ; retry_count++) {
        local_error = 0;
        bufsize = orig_bufsize;
        if ((local_error = sysctl(mib, 4, kp, &bufsize, NULL, 0)) < 0) {
            if (retry_count < 1000) {
                sleep(1);
                continue;
            }
            return local_error;
        } else if (local_error == 0) {
            break;
        }
        sleep(1);
    }

    return local_error;
}