/**
 * SPDX-FileCopyrightText: Copyright (c) 2024-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 * SPDX-License-Identifier: LicenseRef-NvidiaProprietary
 *
 * NVIDIA CORPORATION, its affiliates and licensors retain all intellectual
 * property and proprietary rights in and to this material, related
 * documentation and any modifications thereto. Any use, reproduction,
 * disclosure or distribution of this material and related documentation
 * without an express license agreement from NVIDIA CORPORATION or
 * its affiliates is strictly prohibited.
 */

#include "wsl_utils.h"

bool is_running_in_WSL(void)
{
  static volatile bool verified = false;
  static volatile bool ret = false;

  if (!verified) {
    verified = true;
    FILE *versionFile = fopen("/proc/version", "r");
    if (versionFile != NULL) {
      char versionInfo[512];
      if (fgets(versionInfo, sizeof(versionInfo), versionFile) != NULL) {
        for (int i=0; versionInfo[i] != '\0'; i++) {
          versionInfo[i] = tolower((unsigned char)versionInfo[i]);
        }
        if (strstr(versionInfo, "microsoft") != NULL) {
          /* Yes, Running inside WSL */
          ret = true;
        }
      }
      fclose(versionFile);
    } else {
      printf("ERROR: opening /proc/version failed\n");
    }
  }

  return ret;
}