Merge "init: fixed issues related to forking services"

    // It's OK to LOG(FATAL) in this function since it's running in the first

    // child process.

    if (mount("", "/proc", "proc", kSafeFlags | MS_REMOUNT, "") == -1) {

        PLOG(FATAL) << "couldn't remount(/proc) for " << service_name;

    // Recursively remount / as slave like zygote does so unmounting and mounting /proc

    // doesn't interfere with the parent namespace's /proc mount. This will also

    // prevent any other mounts/unmounts initiated by the service from interfering

    // with the parent namespace but will still allow mount events from the parent

    // namespace to propagate to the child.

    if (mount("rootfs", "/", nullptr, (MS_SLAVE | MS_REC), nullptr) == -1) {

        PLOG(FATAL) << "couldn't remount(/) recursively as slave for " << service_name;

    }

    // umount() then mount() /proc.

    // Note that it is not sufficient to mount with MS_REMOUNT.

    if (umount("/proc") == -1) {

        PLOG(FATAL) << "couldn't umount(/proc) for " << service_name;

    }

    if (mount("", "/proc", "proc", kSafeFlags, "") == -1) {

        PLOG(FATAL) << "couldn't mount(/proc) for " << service_name;

    }

    if (prctl(PR_SET_NAME, service_name.c_str()) == -1) {