Add logid service & install target

CMakeLists.txt

@@ -7,8 +7,4 @@ set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0 -Wall")
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-add_subdirectory(src/logid)
-
-if(NOT EXISTS "${PROJECT_BINARY_DIR}/logid.cfg")
-    configure_file("logid.example.cfg" "logid.cfg" COPYONLY)
-endif()
+add_subdirectory(src/logid)

README.md

@@ -22,7 +22,7 @@ cmake ..
 make
 ```
 
-Installation is currently not implemented.
+To install, run `sudo make install` after building. You can set the daemon to start at boot by running `sudo systemctl start logid`.
 
 ## Compatible Devices
 

src/logid/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.14)
+cmake_minimum_required(VERSION 3.10)
 project(logid)
 
 set(CMAKE_CXX_STANDARD 14)
@@ -25,8 +25,7 @@ add_executable(logid
 set_target_properties(logid PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
 
 pkg_check_modules(PC_EVDEV libevdev)
-pkg_check_modules(libhidpp REQUIRED)
-pkg_check_modules(libconfig++ REQUIRED)
+pkg_check_modules(SYSTEMD "systemd")
 
 find_path(HIDPP_INCLUDE_DIR hidpp)
 find_library(HIDPP_LIBRARY libhidpp.so)
@@ -39,3 +38,20 @@ find_library(EVDEV_LIBRARY
 include_directories(${HIDPP_INCLUDE_DIR}/hidpp ${EVDEV_INCLUDE_DIR})
 
 target_link_libraries(logid ${CMAKE_THREAD_LIBS_INIT} ${EVDEV_LIBRARY} config++ ${HIDPP_LIBRARY})
+
+install(TARGETS logid DESTINATION bin)
+
+if (SYSTEMD_FOUND AND "${SYSTEMD_SERVICES_INSTALL_DIR}" STREQUAL "")
+    execute_process(COMMAND ${PKG_CONFIG_EXECUTABLE}
+        --variable=systemdsystemunitdir systemd
+        OUTPUT_VARIABLE SYSTEMD_SERVICES_INSTALL_DIR)
+    string(REGEX REPLACE "[ \t\n]+" "" SYSTEMD_SERVICES_INSTALL_DIR
+           "${SYSTEMD_SERVICES_INSTALL_DIR}")
+    configure_file(logid.service.cmake ${CMAKE_BINARY_DIR}/logid.service)
+    message(STATUS "systemd units will be installed at ${SYSTEMD_SERVICES_INSTALL_DIR}")
+    install(FILES ${CMAKE_BINARY_DIR}/logid.service
+            DESTINATION ${SYSTEMD_SERVICES_INSTALL_DIR}
+            COMPONENT cp)
+elseif(NOT SYSTEMD_FOUND AND SYSTEMD_SERVICES_INSTALL_DIR)
+    message(FATAL_ERROR "systemd is not found w/ pkg-config but SYSTEMD_SERVICES_INSTALL_DIR is defined.")
+endif()

src/logid/Configuration.cpp

@@ -21,7 +21,7 @@ Configuration::Configuration(const char *config_file)
     }
     catch(const FileIOException &e)
     {
-        log_printf(ERROR, "I/O Error while reading configuration file: %s", e.what());
+        log_printf(ERROR, "I/O Error while reading %s: %s", config_file, e.what());
         throw e;
     }
     catch(const ParseException &e)

src/logid/Configuration.h

@@ -27,6 +27,7 @@ class Configuration
 {
 public:
     Configuration(const char* config_file);
+    Configuration() {}
     std::map<std::string, DeviceConfig*> devices;
 private:
     libconfig::Config cfg;

src/logid/DeviceFinder.cpp

@@ -115,6 +115,7 @@ void DeviceFinder::addDevice(const char *path)
                 }
             }
         }
+        catch(HIDPP::Dispatcher::NoHIDPPReportException &e) { }
         catch(std::system_error &e) { log_printf(WARN, "Failed to open %s: %s", string_path.c_str(), e.what()); }
 
         for(auto dev : _devs)

src/logid/logid.cpp

@@ -17,6 +17,7 @@
 #include "DeviceFinder.h"
 
 #define evdev_name "logid"
+#define DEFAULT_CONFIG_FILE "/etc/logid.cfg"
 
 LogLevel global_verbosity = INFO;
 Configuration* global_config;
@@ -33,7 +34,7 @@ enum class Option
 
 int main(int argc, char** argv)
 {
-    char* config_file = "/etc/logid.cfg";
+    std::string config_file = DEFAULT_CONFIG_FILE;
     for(int i = 1; i < argc; i++)
     {
         Option option = Option::None;
@@ -101,7 +102,7 @@ Possible options are:
     -v,--verbose [level]       Set log level to debug/info/warn/error (leave blank for debug)
     -c,--config [file path]    Change config file from default at %s
     -h,--help                  Print this message.
-)", argv[0], config_file);
+)", argv[0], DEFAULT_CONFIG_FILE);
 
                     return EXIT_SUCCESS;
                 case Option::None:
@@ -111,8 +112,8 @@ Possible options are:
     }
 
     // Read config
-    try { global_config = new Configuration(config_file); }
-    catch (std::exception &e) { return EXIT_FAILURE; }
+    try { global_config = new Configuration(config_file.c_str()); }
+    catch (std::exception &e) { global_config = new Configuration(); }
 
     //Create an evdev device called 'logid'
     try { global_evdev = new EvdevDevice(evdev_name); }

src/logid/logid.service.cmake

@@ -0,0 +1,11 @@
+[Unit]
+Description=Logitech Configuration Daemon
+
+[Service]
+Type=simple
+ExecStart=${CMAKE_INSTALL_PREFIX}/bin/logid
+User=root
+ExecReload=/bin/kill -HUP $MAINPID
+
+[Install]
+WantedBy=multi-user.target