From: Modestas Vainius <modax@debian.org>
Subject: Add DLRestrictions support
Forwarded: not-needed
Origin: vendor
Last-Update: 2011-05-25

The patch adds DLRestrictions compatibility checks to the KPluginLoader::load()
function. Moreover, a new helper CMake macro is introduced to ease addition of
the special DLRestrictions symbol to the KDE 4 shared objects (shared library
and module targets) defined in the project with kde4_add_library() macro.

In order to define DLRestrictions expressions for the shared objects in your
project, you may add something like this to the bottom of the main
CMakeLists.txt:

find_package(DLRestrictions REQUIRED)
kde4deb_dlrestrictions_process_libraries()

Please that either DEFAULT_DLRESTRICTIONS variable or DLRESTRICITIONS target
property must have set beforehand. Otherwise, this snippet will have no effect
on all (or some) the targets.

--- a/cmake/modules/KDE4Macros.cmake
+++ b/cmake/modules/KDE4Macros.cmake
@@ -1026,10 +1026,14 @@ macro (KDE4_ADD_LIBRARY _target_NAME _li
    if (${_lib_TYPE} STREQUAL "SHARED")
       set(_first_SRC)
       set(_add_lib_param SHARED)
+      # Keep a list of SO targets in the global property
+      set_property(GLOBAL PROPERTY KDE4DEB_SO_TARGETS ${_target_NAME} APPEND)
    endif (${_lib_TYPE} STREQUAL "SHARED")
    if (${_lib_TYPE} STREQUAL "MODULE")
       set(_first_SRC)
       set(_add_lib_param MODULE)
+      # Keep a list of SO targets in the global property
+      set_property(GLOBAL PROPERTY KDE4DEB_SO_TARGETS ${_target_NAME} APPEND)
    endif (${_lib_TYPE} STREQUAL "MODULE")
 
    set(_SRCS ${_first_SRC} ${ARGN})
@@ -1317,6 +1321,13 @@ function(KDE4_INSTALL_AUTH_ACTIONS HELPE
 
 endfunction(KDE4_INSTALL_AUTH_ACTIONS)
 
+macro(KDE4DEB_DLRESTRICTIONS_PROCESS_LIBRARIES)
+    if (NOT DLRESTRICTIONS_FOUND)
+        MESSAGE(SEND_ERROR "Install and find_package() DLRestrictions before using it")
+    endif (NOT DLRESTRICTIONS_FOUND)
+    get_property(_all_kde4_so_targets GLOBAL PROPERTY KDE4DEB_SO_TARGETS)
+    dlrestrictions_process_targets(${_all_kde4_so_targets})
+endmacro(KDE4DEB_DLRESTRICTIONS_PROCESS_LIBRARIES)
 
 macro(_KDE4_EXPORT_LIBRARY_DEPENDENCIES _append_or_write _filename)
    message(FATAL_ERROR "_KDE4_EXPORT_LIBRARY_DEPENDENCIES() was an internal macro and has been removed again. Just remove the code which calls it, there is no substitute.")
--- a/kdecore/CMakeLists.txt
+++ b/kdecore/CMakeLists.txt
@@ -397,6 +397,14 @@ kde4_add_library(kdecore ${LIBRARY_TYPE}
 
 target_link_libraries(kdecore ${QT_QTCORE_LIBRARY} ${QT_QTNETWORK_LIBRARY} ${QT_QTDBUS_LIBRARY} ${QT_QTXML_LIBRARY} ${ZLIB_LIBRARY} ${kdecore_OPTIONAL_LIBS})
 
+# Enable DLRestrictions library checking for Debian only
+if (CMAKE_BUILD_TYPE STREQUAL "Debian")
+    find_package(DLRestrictions REQUIRED)
+    macro_log_feature(DLRESTRICTIONS_FOUND "DLRestrictions" "Needed for kdecore plugin loader (Debian specific)" "http://packages.debian.org/search?keywords=libdlrestrictions-dev" TRUE "" "")
+    set_property(TARGET kdecore PROPERTY COMPILE_DEFINITIONS HAVE_DLRESTRICTIONS)
+    target_link_libraries(kdecore dlrestrictions)
+endif (CMAKE_BUILD_TYPE STREQUAL "Debian")
+
 if(WINCE)
   target_link_libraries(kdecore ${WCECOMPAT_LIBRARIES} Ceshell.lib)
 endif(WINCE)
--- a/kdecore/util/kpluginloader.cpp
+++ b/kdecore/util/kpluginloader.cpp
@@ -31,6 +31,14 @@
 #include <QtCore/QDir>
 #include <QtCore/QFileInfo>
 
+#ifdef HAVE_DLRESTRICTIONS
+extern "C" {
+#include <dlrestrictions.h>
+}
+#include <errno.h>
+#include <QtCore/QFile>
+#endif
+
 extern int kLibraryDebugArea();
 
 class KPluginLoaderPrivate
@@ -259,6 +267,30 @@ bool KPluginLoader::load()
     else
         d->pluginVersion = ~0U;
 
+#ifdef HAVE_DLRESTRICTIONS
+    QByteArray enLibFileName = QFile::encodeName(lib.fileName());
+    int dlr_plugstatus = dlr_check_file_compatibility(enLibFileName.data(), NULL);
+    if (dlr_plugstatus == -ENOENT) {
+        // Something was wrong with the given filename
+        kWarning(kLibraryDebugArea()) << "DLRestrictions was unable to load plugin" <<
+            d->name << "(filename: " << lib.fileName() << ") for compatibility checking. "
+            "Error was" << QString::fromLocal8Bit(dlr_error()) << ". Accepting anyway.";
+    } else if (dlr_plugstatus < 0) {
+        /* Do not fail if DLRestrictions specific error occurs */
+        char dlr_buf[4096];
+        dlr_buf[0] = 0;
+        dlr_snprintf_pretty_error(dlr_buf, sizeof(dlr_buf), d->name.toLocal8Bit().data());
+        kWarning(kLibraryDebugArea()) << dlr_buf << ". Accepting" << d->name << "plugin anyway.";
+    } else if (dlr_plugstatus == 0) {
+        /* Plugin or its shared library dependencies are not compatible */
+        d->errorString = i18n("The plugin '%1' or its library dependencies are not "
+                "compatible with currently loaded libraries: %2", d->name,
+                QString::fromLocal8Bit(dlr_error()));
+        unload();
+        return false;
+    } /* Else plugin passed DLRestrictions checks. Fine */
+#endif
+
     return true;
 }