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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"getFileId() error in windows docker container","articleBody":"We are using cppcheck in a Windows Docker container (windowsservercore-20H2) and have noticed that the function ``simplecpp::FileDataCache::getFileId()`` does not work.\n\nThis is because the Windows API function ``GetFileInformationByHandleEx`` is not available in the Docker container (Error 50: ERROR_NOT_SUPPORTED). We also tested this on windowsservercore-ltsc2025, but the problem persists there as well.\nBecause of this problem, cppcheck cannot find files and therefore does not work.\n\nHowever, it works when using the simpler API function ``GetFileInformationByHandle`` (without **Ex**).\nHere is my fix for the problem:\n```cpp\n#ifdef DOCKER\n// New implementation\n    BY_HANDLE_FILE_INFORMATION fileInfo;\n    const BOOL ret = GetFileInformationByHandle(hFile, \u0026fileInfo);\n    if (ret) {\n        id.fileIdInfo.VolumeSerialNumber = static_cast\u003cstd::uint64_t\u003e(fileInfo.dwVolumeSerialNumber);\n        id.fileIdInfo.FileId.IdentifierHi = static_cast\u003cstd::uint64_t\u003e(fileInfo.nFileIndexHigh);\n        id.fileIdInfo.FileId.IdentifierLo = static_cast\u003cstd::uint64_t\u003e(fileInfo.nFileIndexLow);\n    }\n#else\n// Old implementation\n    const BOOL ret = GetFileInformationByHandleEx(hFile, FileIdInfo, \u0026id.fileIdInfo, sizeof(id.fileIdInfo));\n#endif\n```\n\nThe problem can also be reproduced using testrunner.exe.","author":{"url":"https://github.com/willenbr24","@type":"Person","name":"willenbr24"},"datePublished":"2025-11-04T07:32:08.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":22},"url":"https://github.com/583/simplecpp/issues/583"}