Merge "init: use SELinux /dev/null if available"

void open_devnull_stdio(void)

{

    int fd;

    // Try to avoid the mknod() call if we can. Since SELinux makes

    // a /dev/null replacement available for free, let's use it.

    int fd = open("/sys/fs/selinux/null", O_RDWR);

    if (fd == -1) {

        // OOPS, /sys/fs/selinux/null isn't available, likely because

        // /sys/fs/selinux isn't mounted. Fall back to mknod.

        static const char *name = "/dev/__null__";

        if (mknod(name, S_IFCHR | 0600, (1 << 8) | 3) == 0) {

            fd = open(name, O_RDWR);

            unlink(name);

        if (fd >= 0) {

        }

        if (fd == -1) {

            exit(1);

        }

    }

    dup2(fd, 0);

    dup2(fd, 1);

    dup2(fd, 2);

    if (fd > 2) {

        close(fd);

    }

            return;

        }

    }

    exit(1);

}

void import_kernel_cmdline(int in_qemu,