Archipelago » qemu

    sigset_t oldmask, mask;

    sigemptyset(&mask);

    sigaddset(&mask, SIGCHLD);

    sigprocmask(SIG_BLOCK, &mask, &oldmask);

    /* try to launch network script */

    pid = fork();

    if (pid == 0) {

        int open_max = sysconf(_SC_OPEN_MAX), i;

        for (i = 0; i < open_max; i++) {

            if (i != STDIN_FILENO &&

                i != STDOUT_FILENO &&

                i != STDERR_FILENO &&

                i != fd) {

                close(i);

        parg = args;

        *parg++ = (char *)setup_script;

        *parg++ = (char *)ifname;

        *parg++ = NULL;

        execv(setup_script, args);

        _exit(1);

    } else if (pid > 0) {

        while (waitpid(pid, &status, 0) != pid) {

            /* loop */

        }

        sigprocmask(SIG_SETMASK, &oldmask, NULL);

        if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {

            return 0;

        }

    }

    fprintf(stderr, "%s: could not launch network script\n", setup_script);

    return -1;

static void sigchld_handler(int signal)

{

    waitpid(-1, NULL, WNOHANG);

}

static void sighandler_setup(void)

    act.sa_handler = sigchld_handler;

    act.sa_flags = SA_NOCLDSTOP;

    sigaction(SIGCHLD, &act, NULL);

    sighandler_setup();