Linux: Correct handling of documentation in case of AppImage. Code refactoring.

src/Core/Unix/CoreService.cpp

@@ -432,28 +432,14 @@ namespace VeraCrypt
 
 #if defined(TC_LINUX)
                     // AppImage specific handling:
-                    // If running from an AppImage, and appPath is inside the AppImage's mount point (APPDIR),
+                    // If running from an AppImage, use the path to the AppImage file itself for sudo.
-                    // and APPDIR has the expected prefix, then use the AppImage file path (APPIMAGE) for sudo.
                     const char* appImageEnv = getenv("APPIMAGE");
-                    const char* appDirEnv = getenv("APPDIR");
 
-                    if (appImageEnv && appDirEnv)
+                    if (Process::IsRunningUnderAppImage(appPath) && appImageEnv != NULL)
 					{
-                        string appDirString = appDirEnv;
+						// The path to the AppImage file is stored in the APPIMAGE environment variable.
-                        string appImageFileString = appImageEnv;
+						// We need to use this path for sudo to work correctly.
-                        const string appImageMountPrefix = "/tmp/.mount_Veracr"; // Based on observed "/tmp/.mount_VeracrXXXXXX"
+                        appPath = appImageEnv;
-
-                        // Check: APPDIR is not empty,
-                        // appPath starts with APPDIR,
-                        // and APPDIR itself starts with the expected AppImage mount prefix
-                        if (!appDirString.empty() &&
-                            appPath.rfind(appDirString, 0) == 0 &&
-                            appDirString.rfind(appImageMountPrefix, 0) == 0)
-                        {
-                            // All conditions met, this is the AppImage scenario.
-                            // Use the path to the AppImage file itself for sudo.
-                            appPath = appImageFileString;
-                        }
                     }
 #endif
 					throw_sys_if (dup2 (inPipe->GetReadFD(), STDIN_FILENO) == -1);

src/Main/GraphicUserInterface.cpp

@@ -1354,6 +1354,21 @@ namespace VeraCrypt
 			htmlPath += L"/../Resources/doc/HTML/";
 #elif defined (TC_UNIX)
 			htmlPath = L"/usr/share/doc/veracrypt/HTML/";
+#if defined(TC_LINUX)
+			// AppImage specific handling:
+			// if we are running from an AppImage, we need to use the path inside the AppImage
+			// instead of the path on the host system
+			std::string appPath= StringConverter::ToSingle (wstring(Application::GetExecutablePath()));
+			if (Process::IsRunningUnderAppImage(appPath))
+			{
+				const char* appDirEnv = getenv("APPDIR");
+				if (appDirEnv)
+				{
+					htmlPath = wxString::FromUTF8(appDirEnv);
+					htmlPath += "/usr/share/doc/veracrypt/HTML/";
+				}
+			}
+#endif
 #else
 			localFile = false;
 #endif

src/Platform/Unix/Process.cpp

@@ -263,4 +263,36 @@ namespace VeraCrypt
 
 		return strOutput;
 	}
+
+#if defined(TC_LINUX)
+	bool Process::IsRunningUnderAppImage (const string &executablePath)
+	{
+		if (executablePath.empty())
+			return false;
+
+		// AppImage detection logic:
+		// Check that APPIMAGE and APPDIR environment variables are set
+		// Check that the executable path starts with APPDIR
+		// Check that APPDIR itself starts with the expected AppImage mount prefix
+		const char* appImageEnv = getenv("APPIMAGE");
+		const char* appDirEnv = getenv("APPDIR");
+
+		if (appImageEnv && appDirEnv)
+		{
+			string appDirString = appDirEnv;
+			string appImageFileString = appImageEnv;
+			const string appImageMountPrefix1 = "/tmp/.mount_Veracr";
+			const string appImageMountPrefix2 = "/tmp/.mount_VeraCr";
+
+			if (!appDirString.empty() &&
+				executablePath.rfind(appDirString, 0) == 0 &&
+				(appDirString.rfind(appImageMountPrefix1, 0) == 0 || appDirString.rfind(appImageMountPrefix2, 0) == 0))
+			{
+				// All conditions met, this is the AppImage scenario.
+				return true;
+			}
+		}
+		return false;
+	}
+#endif
 }

src/Platform/Unix/Process.h

@@ -34,6 +34,9 @@ namespace VeraCrypt
 		static bool IsExecutable(const std::string& path);
 		static std::string FindSystemBinary(const char* name, std::string& errorMsg);
 		static string Execute (const string &processName, const list <string> &arguments, int timeOut = -1, ProcessExecFunctor *execFunctor = nullptr, const Buffer *inputData = nullptr);
+#if defined(TC_LINUX)
+		static bool IsRunningUnderAppImage (const string &executablePath);
+#endif
 
 	protected: