fix: auto-disable XDP for non-conforming apps

libs/linglong/src/linglong/cli/cli.cpp

@@ -43,6 +43,7 @@
 #include "linglong/utils/namespace.h"
 #include "linglong/utils/runtime_config.h"
 #include "linglong/utils/xdg/directory.h"
+#include "linglong/utils/xdp.h"
 #include "ocppi/runtime/ExecOption.hpp"
 #include "ocppi/runtime/RunOption.hpp"
 #include "ocppi/runtime/Signal.hpp"
@@ -867,6 +868,14 @@ int Cli::runResolvedContext(runtime::RunContext &runContext,
         return -1;
     }
 
+    const auto &appid = runContext.getTargetID();
+    if (!options.disableXdp.has_value() && !utils::isValidXdgDesktopPortalId(appid)) {
+        LogW("appid '{}' doesn't conform to XDP ID specification, disabling XDP integration. "
+             "Use --enable-xdp to override.",
+             appid);
+        runOptions.disableXdp = true;
+    }
+
     auto container = this->containerBuilder.createRunContainer(runContext, runOptions);
     if (!container) {
         this->printer.printErr(container.error());

libs/linglong/tests/ll-tests/CMakeLists.txt

@@ -64,6 +64,7 @@ pfl_add_executable(
   src/linglong/utils/sha256_test.cpp
   src/linglong/utils/transaction_test.cpp
   src/linglong/utils/xdg/directory_test.cpp
+  src/linglong/utils/xdp_test.cpp
   src/main.cpp
 
 

libs/linglong/tests/ll-tests/src/linglong/utils/xdp_test.cpp

@@ -0,0 +1,101 @@
+/*
+ * SPDX-FileCopyrightText: 2026 UnionTech Software Technology Co., Ltd.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
+#include <gtest/gtest.h>
+
+#include "linglong/utils/xdp.h"
+
+using namespace linglong::utils;
+
+TEST(IsValidXdgDesktopPortalIdTest, ValidStandardId)
+{
+    EXPECT_TRUE(isValidXdgDesktopPortalId("org.example.app"));
+    EXPECT_TRUE(isValidXdgDesktopPortalId("com.deepin.calculator"));
+    EXPECT_TRUE(isValidXdgDesktopPortalId("org.freedesktop.portal"));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, ValidWithHyphenInLastSegment)
+{
+    EXPECT_TRUE(isValidXdgDesktopPortalId("org.example.my-app"));
+    EXPECT_TRUE(isValidXdgDesktopPortalId("com.deepin.app-launcher"));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, ValidWithUnderscore)
+{
+    EXPECT_TRUE(isValidXdgDesktopPortalId("org.example_my.app"));
+    EXPECT_TRUE(isValidXdgDesktopPortalId("com.deepin.my_app"));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, ValidWithDigits)
+{
+    EXPECT_TRUE(isValidXdgDesktopPortalId("org.example.app2"));
+    EXPECT_TRUE(isValidXdgDesktopPortalId("org.2example.app"));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, ValidMultiSegment)
+{
+    EXPECT_TRUE(isValidXdgDesktopPortalId("org.deepin.linglong.app"));
+    EXPECT_TRUE(isValidXdgDesktopPortalId("a.b.c.d.e"));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, InvalidSingleSegment)
+{
+    EXPECT_FALSE(isValidXdgDesktopPortalId("single"));
+    EXPECT_FALSE(isValidXdgDesktopPortalId("app"));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, InvalidEmptyString)
+{
+    EXPECT_FALSE(isValidXdgDesktopPortalId(""));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, InvalidHyphenInNonLastSegment)
+{
+    EXPECT_FALSE(isValidXdgDesktopPortalId("org.my-app.app"));
+    EXPECT_FALSE(isValidXdgDesktopPortalId("my-org.example.app"));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, InvalidEmptySegment)
+{
+    EXPECT_FALSE(isValidXdgDesktopPortalId("org..app"));
+    EXPECT_FALSE(isValidXdgDesktopPortalId(".org.app"));
+    EXPECT_FALSE(isValidXdgDesktopPortalId("org.app."));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, InvalidSpecialChars)
+{
+    EXPECT_FALSE(isValidXdgDesktopPortalId("org.example.app!"));
+    EXPECT_FALSE(isValidXdgDesktopPortalId("org.example.app@home"));
+    EXPECT_FALSE(isValidXdgDesktopPortalId("org/example/app"));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, InvalidSlashInId)
+{
+    EXPECT_FALSE(isValidXdgDesktopPortalId("org.deepin.calculator/stable"));
+    EXPECT_FALSE(isValidXdgDesktopPortalId("org/deepin/app"));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, InvalidHyphenInMultipleNonLastSegments)
+{
+    EXPECT_FALSE(isValidXdgDesktopPortalId("my-org.my-app.app"));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, ValidHyphenOnlyInLastSegment)
+{
+    EXPECT_TRUE(isValidXdgDesktopPortalId("org.example.a-b"));
+    EXPECT_TRUE(isValidXdgDesktopPortalId("org.example.a-b-c"));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, InvalidLastSegmentEmpty)
+{
+    EXPECT_FALSE(isValidXdgDesktopPortalId("org.example."));
+}
+
+TEST(IsValidXdgDesktopPortalIdTest, TwoSegmentsValid)
+{
+    EXPECT_TRUE(isValidXdgDesktopPortalId("org.app"));
+    EXPECT_TRUE(isValidXdgDesktopPortalId("a.b"));
+}

libs/utils/CMakeLists.txt

@@ -48,6 +48,7 @@ pfl_add_library(
   src/linglong/utils/transaction.h
   src/linglong/utils/xdg/directory.cpp
   src/linglong/utils/xdg/directory.h
+  src/linglong/utils/xdp.h
   COMPILE_FEATURES
   PUBLIC
   cxx_std_17

libs/utils/src/linglong/utils/xdp.h

@@ -0,0 +1,53 @@
+/*
+ * SPDX-FileCopyrightText: 2026 UnionTech Software Technology Co., Ltd.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <algorithm>
+#include <cctype>
+#include <string>
+#include <vector>
+
+namespace linglong::utils {
+
+inline bool isValidXdgDesktopPortalId(std::string_view appid) noexcept
+{
+    std::vector<std::string_view> segments;
+
+    size_t start = 0;
+    for (size_t i = 0; i < appid.size(); ++i) {
+        if (appid[i] == '.') {
+            segments.push_back(appid.substr(start, i - start));
+            start = i + 1;
+        }
+    }
+    segments.push_back(appid.substr(start));
+
+    if (segments.size() < 2) {
+        return false;
+    }
+
+    for (size_t i = 0; i + 1 < segments.size(); ++i) {
+        if (segments[i].empty()) {
+            return false;
+        }
+        if (!std::all_of(segments[i].begin(), segments[i].end(), [](char c) {
+                return std::isalnum(static_cast<unsigned char>(c)) || c == '_';
+            })) {
+            return false;
+        }
+    }
+
+    const auto &last = segments.back();
+    if (last.empty()) {
+        return false;
+    }
+    return std::all_of(last.begin(), last.end(), [](char c) {
+        return std::isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '-';
+    });
+}
+
+} // namespace linglong::utils