monitor_open
fd = monitor_open(conf_path, O_RDONLY, 0);
fd = monitor_open(keyfile, O_RDONLY, 0);
fd = monitor_open(keyfile, O_RDONLY, 0);
fd = monitor_open(keyfile, O_RDONLY, 0);
fd = monitor_open(path, flags, mask);
fd = monitor_open(path, O_RDONLY | O_NONBLOCK, 0);
int monitor_open(const char *, int, mode_t);
fd = monitor_open(policy_file, O_RDONLY, 0);
fd = monitor_open(file, O_RDONLY, 0);