Merge "CgroupSetupCgroups: don't leak fd."

#endif

// WARNING: This function should be called only from SetupCgroups and only once.

// It intentionally leaks an FD, so additional invocation will result in additional leak.

static bool WriteRcFile(const std::map<std::string, CgroupDescriptor>& descriptors) {

    // WARNING: We are intentionally leaking the FD to keep the file open forever.

    // Let init keep the FD open to prevent file mappings from becoming invalid in

    // case the file gets deleted somehow.

    int fd = TEMP_FAILURE_RETRY(open(CGROUPS_RC_PATH, O_CREAT | O_WRONLY | O_TRUNC | O_CLOEXEC,

                                     S_IRUSR | S_IRGRP | S_IROTH));

    unique_fd fd(TEMP_FAILURE_RETRY(open(CGROUPS_RC_PATH, O_CREAT | O_WRONLY | O_TRUNC | O_CLOEXEC,

                                         S_IRUSR | S_IRGRP | S_IROTH)));

    if (fd < 0) {

        PLOG(ERROR) << "open() failed for " << CGROUPS_RC_PATH;

        return false;