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fix(fs): use libuv for recursive cpSync to avoid VirtioFS EACCES #65547

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fix(fs): use libuv for recursive cpSync to avoid VirtioFS EACCES #65547

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29 changes: 24 additions & 5 deletions src/node_file.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -4202,17 +4202,36 @@ static void CpSyncCopyDir(const FunctionCallbackInfo<Value>& args) {
return false;
}
} else if (dir_entry.is_regular_file()) {
std::filesystem::copy_file(
dir_entry.path(), dest_file_path, file_copy_opts, error);
if (error) {
if (error == std::errc::file_exists) {
// Use libuv for regular file copies to avoid VirtioFS EACCES
// (libstdc++ creates dest with 0200 then fchmod, VirtioFS blocks).
// Mirrors single-file path which uses uv_fs_copyfile when mode != 0.
// Handle force / errorOnExist / skipExisting semantics via libuv flags.
if (!force && !error_on_exist) {
std::error_code ec;
if (std::filesystem::exists(dest_file_path, ec) && !ec) {
continue;
}
}
auto src_str = ConvertPathToUTF8(dir_entry.path());
auto dest_file_str = ConvertPathToUTF8(dest_file_path);
uv_fs_t req;
auto cleanup = OnScopeLeave([&req]() { uv_fs_req_cleanup(&req); });
int flags = error_on_exist ? UV_FS_COPYFILE_EXCL : 0;
int result = uv_fs_copyfile(nullptr,
&req,
src_str.c_str(),
dest_file_str.c_str(),
flags,
nullptr);
if (is_uv_error(result)) {
if (result == UV_EEXIST) {
THROW_ERR_FS_CP_EEXIST(isolate,
"[ERR_FS_CP_EEXIST]: Target already exists: "
"cp returned EEXIST (%s already exists)",
dest_file_path);
return false;
}
env->ThrowStdErrException(error, "cp", dest_str.c_str());
env->ThrowUVException(result, "cp", nullptr, dest_file_str.c_str());
return false;
}

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