if (fork() == 0) {                        
                        CHECKED(setpgid(0, 0));
                        setsid();
                        sigset_t mask;
                        CHECKED(sigemptyset(&mask));
                        CHECKED(sigprocmask(SIG_BLOCK, &mask, nullptr));
                        setCGroups(cgroups);
                        chdir(homedir.c_str());
                        int fd = open("/dev/null", O_WRONLY | O_APPEND, 0600); // no O_CLOEXEC
                        if (fd >= 0) {
                            dup2(fd, STDIN_FILENO);
                            dup2(fd, STDOUT_FILENO);
                            dup2(fd, STDERR_FILENO);
                            fcntl(STDIN_FILENO, F_SETFD, 0);
                            fcntl(STDOUT_FILENO, F_SETFD, 0);
                            fcntl(STDERR_FILENO, F_SETFD, 0);
                        }
                        close_file_descriptors(fd >= 3);

                        if (fork() == 0) {
                            CHECKED(setpgid(0, 0));
                            char * argv[] = { (char *)path.c_str(), (char *)homedir_arg.c_str(), (char *)pid_flag.c_str(), nullptr };
                            clearenv();
                            Permissions::dropToUserPermanently(uid);
                            execve(path.c_str(), argv, env);
                            _exit(0);
                        }
                        _exit(0);
                    } else {
                        wait(NULL);
                    }