add service

CMakeLists.txt

@@ -4,11 +4,15 @@ project(ipmifan LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 20)
 
-find_package(Doxygen)
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+	set(CMAKE_INSTALL_PREFIX "/usr" CACHE PATH "..." FORCE)
+endif(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
 
 find_package(PkgConfig REQUIRED)
 pkg_search_module(IPMI_MONITORING REQUIRED libipmimonitoring)
 pkg_search_module(IPMI REQUIRED libfreeipmi)
+pkg_search_module(SYSTEMD systemd)
+
 
 add_executable(${PROJECT_NAME} main.cpp ipmi.cpp lm.cpp)
 target_link_libraries(${PROJECT_NAME} ${IPMI_LINK_LIBRARIES} ${IPMI_MONITORING_LINK_LIBRARIES} sensors)
@@ -16,3 +20,11 @@ target_include_directories(${PROJECT_NAME} PRIVATE ${IPMI_INCLUDE_DIRS} ${IPMI_M
 target_compile_options(${PROJECT_NAME} PRIVATE "-Wall" "-O2" "-g" "-fno-strict-aliasing" "-Wfatal-errors" "-Wno-reorder")
 install(TARGETS ${PROJECT_NAME} RUNTIME DESTINATION bin)
 
+if(SYSTEMD_FOUND)
+	pkg_get_variable(SYSTEMD_UNIT_DIR_PKG systemd systemd_system_unit_path)
+	message(STATUS ${SYSTEMD_UNIT_DIR_PKG})
+	string(REPLACE ":" ";" SYSTEMD_UNIT_DIR_LIST ${SYSTEMD_UNIT_DIR_PKG})
+	list(GET SYSTEMD_UNIT_DIR_LIST 0 SYSTEMD_UNIT_DIR)
+
+	install(FILES ipmifan.service DESTINATION ${SYSTEMD_UNIT_DIR})
+endif(SYSTEMD_FOUND)

ipmi.cpp

@@ -2,6 +2,8 @@
 #include <algorithm>
 #include <iostream>
 
+static constexpr size_t IPMI_RAW_MAX_ARGS = 65536*2;
+
 static double ipmi_convert_sensor_reading(void *sensor_reading, int sensor_reading_type)
 {
 	if(sensor_reading_type == IPMI_MONITORING_SENSOR_READING_TYPE_UNSIGNED_INTEGER8_BOOL)
@@ -102,3 +104,40 @@ ipmi_monitoring_ctx_t init_ipmi_monitoring()
 
 	return ctx;
 }
+
+ipmi_ctx_t ipmi_open_context()
+{
+	ipmi_ctx_t ctx = ipmi_ctx_create();
+	if(!ctx)
+	{
+		std::cerr<<"Could not allocae raw context\n";
+		return nullptr;
+	}
+
+	ipmi_driver_type_t driver = IPMI_DEVICE_OPENIPMI;
+	int ret = ipmi_ctx_find_inband(ctx, &driver, false, 0, 0, nullptr, 0, 0);
+	if(ret < 0)
+	{
+		std::cerr<<"Could not create raw context "<<ipmi_ctx_errormsg(ctx)<<'\n';
+		ipmi_ctx_destroy(ctx);
+		return nullptr;
+	}
+	return ctx;
+}
+
+bool ipmi_set_fan_group(ipmi_ctx_t raw_ctx, uint8_t group, double speed)
+{
+	char converted_speed = std::max(std::min(static_cast<char>(100), static_cast<char>(speed*100)), static_cast<char>(0));
+
+	std::cout<<"setting fan group "<<static_cast<int>(group)<<" to "<<speed*100<<"% ("<<static_cast<int>(converted_speed)<<")\n";
+
+	char command[] = {0x70, 0x66, 0x01, static_cast<char>(group), converted_speed};
+	char bytesrx[IPMI_RAW_MAX_ARGS] = {0};
+	int rxlen = ipmi_cmd_raw(raw_ctx, 0, 0x30, command, sizeof(command), bytesrx, IPMI_RAW_MAX_ARGS);
+	if(rxlen < 0)
+	{
+		std::cerr<<"Raw write to ipmi failed with: "<<ipmi_ctx_errormsg(raw_ctx);
+		return false;
+	}
+	return true;
+}

ipmi.h

@@ -1,6 +1,7 @@
 #include <vector>
 #include <string>
 #include <ipmi_monitoring.h>
+#include <freeipmi/freeipmi.h>
 
 #include "sensor.h"
 
@@ -11,3 +12,7 @@ bool ipmi_fill_sensor_ids(std::vector<Sensor>& sensors, ipmi_monitoring_ctx_t ct
 bool ipmi_update_sensors(std::vector<Sensor>& sensors, ipmi_monitoring_ctx_t ctx, struct ipmi_monitoring_ipmi_config* config);
 
 ipmi_monitoring_ctx_t init_ipmi_monitoring();
+
+ipmi_ctx_t ipmi_open_context();
+
+bool ipmi_set_fan_group(ipmi_ctx_t raw_ctx, uint8_t group, double speed);

ipmifan.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Start impi fan control
+After=lm_sensors.service systemd-modules-load.service
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/ipmifan
+
+[Install]
+WantedBy=multi-user.target

main.cpp

@@ -15,8 +15,6 @@
 #include "ipmi.h"
 #include "lm.h"
 
-static constexpr size_t IPMI_RAW_MAX_ARGS = 65536*2;
-
 sig_atomic_t running = true;
 
 void sig_handler(int sig)
@@ -114,43 +112,6 @@ std::vector<double> get_fan_zones(const std::vector<Sensor>& sensors)
 	return out;
 }
 
-ipmi_ctx_t ipmi_open()
-{
-	ipmi_ctx_t ctx = ipmi_ctx_create();
-	if(!ctx)
-	{
-		std::cerr<<"Could not allocae raw context\n";
-		return nullptr;
-	}
-
-	ipmi_driver_type_t driver = IPMI_DEVICE_OPENIPMI;
-	int ret = ipmi_ctx_find_inband(ctx, &driver, false, 0, 0, nullptr, 0, 0);
-	if(ret < 0)
-	{
-		std::cerr<<"Could not create raw context "<<ipmi_ctx_errormsg(ctx)<<'\n';
-		ipmi_ctx_destroy(ctx);
-		return nullptr;
-	}
-	return ctx;
-}
-
-bool ipmi_set_fan_group(ipmi_ctx_t raw_ctx, uint8_t group, double speed)
-{
-	char converted_speed = std::max(std::min(static_cast<char>(100), static_cast<char>(speed*100)), static_cast<char>(0));
-
-	std::cout<<"setting fan group "<<static_cast<int>(group)<<" to "<<speed*100<<"% ("<<static_cast<int>(converted_speed)<<")\n";
-
-	char command[] = {0x70, 0x66, 0x01, static_cast<char>(group), converted_speed};
-	char bytesrx[IPMI_RAW_MAX_ARGS] = {0};
-	int rxlen = ipmi_cmd_raw(raw_ctx, 0, 0x30, command, sizeof(command), bytesrx, IPMI_RAW_MAX_ARGS);
-	if(rxlen < 0)
-	{
-		std::cerr<<"Raw write to ipmi failed with: "<<ipmi_ctx_errormsg(raw_ctx);
-		return false;
-	}
-	return true;
-}
-
 int main(int argc, char **argv)
 {
 	signal(SIGABRT, sig_handler);
@@ -173,7 +134,7 @@ int main(int argc, char **argv)
 	if(!monitoring_ctx)
 		return 1;
 
-	ipmi_ctx_t raw_ctx = ipmi_open();
+	ipmi_ctx_t raw_ctx = ipmi_open_context();
 	if(!raw_ctx)
 		return 1;