/*
 * WPA Supplicant - Shared utility functions and constants
 * Copyright (c) 2024, Google Inc. All rights reserved.
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#ifndef SHARED_UTILS_H
#define SHARED_UTILS_H

#include <android-base/file.h>
#include <fcntl.h>

extern "C"
{
#include "utils/common.h"
}

constexpr char kIfaceDriverName[] = "nl80211";
constexpr mode_t kConfigFileMode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;

/**
 * Ensure that the config file at |config_file_path| exists.
 * Returns 0 on success, or errno otherwise.
 */
int ensureConfigFileExistsAtPath(const std::string& config_file_path) {
    int ret = access(config_file_path.c_str(), R_OK);
    if (ret == 0) {
        return 0;
    }
    if (errno == EACCES) {
        ret = chmod(config_file_path.c_str(), kConfigFileMode);
        if (ret == 0) {
            return 0;
        } else {
            wpa_printf(
                MSG_ERROR, "Cannot set RW to %s. Errno: %s",
                config_file_path.c_str(), strerror(errno));
        }
    } else if (errno != ENOENT) {
        wpa_printf(
            MSG_ERROR, "Cannot access %s. Errno: %s",
            config_file_path.c_str(), strerror(errno));
    }
    return errno;
}

#endif // SHARED_UTILS_H