read lib docu and make example exe

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.9 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.24 FATAL_ERROR)
 
 # cmake setup begin
 project(solanaceae_clamav)

external/CMakeLists.txt

@@ -12,15 +12,15 @@ add_subdirectory(./solanaceae_message3)
 # TODO: move to clamav.cmake
 find_package(PkgConfig QUIET)
 if (PKG_CONFIG_FOUND)
-	pkg_check_modules(PKGC_CLAMAV QUIET IMPORTED_TARGET libclamav)
+	pkg_check_modules(PKGC_CLAMAV QUIET IMPORTED_TARGET GLOBAL libclamav)
 
 	if (PKGC_CLAMAV_FOUND)
-		add_library(libclamav ALIAS PkgConfig::PKGC_CLAMAV)
-		message("II libclamav found using pkg-config")
+		add_library(EXT_SOL::libclamav ALIAS PkgConfig::PKGC_CLAMAV)
+		message("II clamav found using pkg-config")
 	endif()
 endif()
 
-if (NOT TARGET libclamav)
+if (NOT TARGET EXT_SOL::libclamav)
 	include(FetchContent)
 	set(ENABLE_LIBCLAMAV_ONLY ON)
 	set(ENABLE_APP OFF)
@@ -30,9 +30,11 @@ if (NOT TARGET libclamav)
 		GIT_TAG clamav-1.2.0
 
 		# find_package is tried first
-		FIND_PACKAGE_ARGS NAMES libclamav
+		FIND_PACKAGE_ARGS NAMES clamav ClamAV libclamav libClamAV
 	)
 
 	FetchContent_MakeAvailable(clamav)
+
+	add_library(EXT_SOL::libclamav ALIAS clamav)
 endif()
 

src/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.9 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.24 FATAL_ERROR)
 
 add_library(solanaceae_clamav
 	./solanaceae/clamav/test_lib.cpp
@@ -6,7 +6,17 @@ add_library(solanaceae_clamav
 target_include_directories(solanaceae_clamav PUBLIC .)
 target_compile_features(solanaceae_clamav PUBLIC cxx_std_17)
 target_link_libraries(solanaceae_clamav PUBLIC
-	libclamav
+	EXT_SOL::libclamav
+	#solanaceae_util
+)
+
+add_executable(solanaceae_clamav_test
+	./solanaceae/clamav/test_exe.cpp
+)
+target_include_directories(solanaceae_clamav_test PUBLIC .)
+target_compile_features(solanaceae_clamav_test PUBLIC cxx_std_17)
+target_link_libraries(solanaceae_clamav_test PUBLIC
+	EXT_SOL::libclamav
 	#solanaceae_util
 )
 

src/solanaceae/clamav/test_exe.cpp

@@ -0,0 +1,79 @@
+#include <clamav.h>
+
+#include <iostream>
+
+int main(void) {
+	if (cl_init(CL_INIT_DEFAULT) != CL_SUCCESS) {
+		return 1;
+	}
+
+	auto* clamav_engine = cl_engine_new();
+	if (clamav_engine == nullptr) {
+		return 2;
+	}
+
+	std::string db_dir;
+	// TODO: load from config
+
+	unsigned int signo = 0;
+
+	if (db_dir.empty()) {
+		std::cout << "default db dir: " << cl_retdbdir() << "\n";
+		if (cl_load(cl_retdbdir(), clamav_engine, &signo, CL_DB_STDOPT) != CL_SUCCESS) {
+			std::cerr << "default db dir load failed, falling back to '/var/lib/clamav'\n";
+			if (cl_load("/var/lib/clamav", clamav_engine, &signo, CL_DB_STDOPT) != CL_SUCCESS) {
+				std::cerr << "db dir load failed, exiting\n";
+				return 3;
+			} else {
+				db_dir = "/var/lib/clamav";
+			}
+		} else {
+			db_dir = cl_retdbdir();
+		}
+		// if db_dir changed, save to config?
+	} else {
+		if (cl_load(db_dir.c_str(), clamav_engine, &signo, CL_DB_STDOPT) != CL_SUCCESS) {
+			std::cerr << "config db dir load failed, exiting (" << db_dir << ")\n";
+			return 3;
+		}
+	}
+
+	std::cout << "signatures loaded: " << signo << "\n";
+
+	if (cl_engine_compile(clamav_engine) != CL_SUCCESS) {
+		cl_engine_free(clamav_engine);
+		return 4;
+	}
+
+	// TODO: database update watcher
+
+	const char* filename = "~/Downloads/cubic-paper.pdf";
+	const char* virname = nullptr;
+	unsigned long int scanned = 0;
+
+	struct cl_scan_options scan_opts {
+		/*CL_SCAN_GENERAL_ALLMATCHES |*/ CL_SCAN_GENERAL_HEURISTICS | CL_SCAN_GENERAL_HEURISTIC_PRECEDENCE,
+		~0u,
+		~0u,
+		0u,
+		0u
+	};
+
+	if (auto ret = cl_scanfile(
+		filename,
+		&virname,
+		&scanned,
+		clamav_engine,
+		&scan_opts
+	); ret != CL_CLEAN && ret != CL_VIRUS) {
+		// error
+	} else if (ret == CL_VIRUS) {
+		std::cout << "file virus\n";
+	} else { // clean
+		std::cout << "file clean\n";
+	}
+
+	cl_engine_free(clamav_engine);
+	return 0;
+}
+