🌴 Sync 2026-03-05 23:51:42

fancontrol/Makefile

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+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=fancontrol
+PKG_VERSION:=1
+PKG_RELEASE:=1
+
+
+PKG_LICENSE:=MIT
+PKG_LICENSE_FILES:=LICENSE
+PKG_MAINTAINER:=JiaY-shi <shi05275@163.com>
+
+PKG_BUILD_PARALLEL:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/fancontrol
+  SECTION:=utils
+  CATEGORY:=Utilities
+  TITLE:=FanControl for OpenWRT
+endef
+
+define Package/fancontrol/description
+  FanControl for OpenWRT.
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+	$(CP) ./src/* $(PKG_BUILD_DIR)
+endef
+
+MAKE_FLAGS += \
+	-C $(PKG_BUILD_DIR)
+
+define Package/fancontrol/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/fancontrol $(1)/usr/bin/fancontrol
+	$(INSTALL_DIR) $(1)/etc/config
+	$(INSTALL_BIN) ./files/fancontrol.config $(1)/etc/config/fancontrol
+	$(INSTALL_DIR) $(1)/etc/init.d
+	$(INSTALL_BIN) ./files/fancontrol.init $(1)/etc/init.d/fancontrol
+endef
+
+$(eval $(call BuildPackage,fancontrol))

fancontrol/files/fancontrol.config

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+config fancontrol settings
+    option enabled '0'
+    option thermal_file '/sys/devices/virtual/thermal/thermal_zone0/temp'
+    option fan_file '/sys/devices/virtual/thermal/cooling_device0/cur_state'
+    option start_temp '45'
+    option start_speed '35'
+    option max_speed '255'
+    option temp_div '1000'

fancontrol/files/fancontrol.init

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+#!/bin/sh /etc/rc.common
+
+START=99
+STOP=01
+USE_PROCD=1
+
+NAME=fancontrol
+PROG=/usr/bin/$NAME
+
+start_service() {
+    config_load "$NAME"
+
+    local enabled
+    config_get enabled settings enabled
+    [ "$enabled" = "1" ] || { _info "Instance \"$NAME\" disabled."; return 1; }
+
+    local thermal_file
+    local fan_file
+    local start_temp
+    local start_speed
+    local max_speed
+    local temp_div
+
+    config_get thermal_file settings thermal_file
+    config_get fan_file settings fan_file
+    config_get start_temp settings start_temp
+    config_get start_speed settings start_speed
+    config_get max_speed settings max_speed
+    config_get temp_div settings temp_div
+
+    procd_open_instance
+    procd_set_param command $PROG
+    [ -n "$thermal_file" ] && procd_append_param command -T "$thermal_file"
+    [ -n "$fan_file" ] && procd_append_param command -F "$fan_file"
+    [ -n "$start_temp" ] && procd_append_param command -t "$start_temp"
+    [ -n "$start_speed" ] && procd_append_param command -s "$start_speed"
+    [ -n "$max_speed" ] && procd_append_param command -m "$max_speed"
+    [ -n "$temp_div" ] && procd_append_param command -d "$temp_div"
+    procd_set_param respawn
+    procd_close_instance
+}
+
+start() {
+    start_service
+}
+
+stop() {
+    procd_kill_instance
+}
+
+reload() {
+    procd_reload_instance
+}
+
+service_triggers() {
+    procd_add_reload_trigger "fancontrol"
+}

fancontrol/src/Makefile

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+CC         := gcc
+CFLAGS     := -O3 -Wall -fomit-frame-pointer
+
+all: fancontrol
+
+fancontrol: %: %.o
+	$(CC) $(LDFLAGS) -o $@ $^
+
+%.o: %.c
+	$(CC) $(CFLAGS) $(INCLUDE) -o $@ -c $<
+
+clean:
+	rm -f fancontrol *.o *~

fancontrol/src/fancontrol.c

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+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <signal.h> 
+
+#define MAX_LENGTH 200
+#define MAX_TEMP 120
+
+// 定义全局变量
+char thermal_file[MAX_LENGTH] = "/sys/devices/virtual/thermal/thermal_zone0/temp";      // -T
+char fan_file[MAX_LENGTH] = "/sys/devices/virtual/thermal/cooling_device0/cur_state";   // -F
+
+int start_speed = 35;   // -s
+int start_temp = 45;    // -t
+int max_speed = 255;    // -m
+int temp_div = 1000;    // -d
+int debug_mode = 0;     // -D
+
+/**
+ * 底层读文件
+ */
+static int read_file(const char* path ,char* result ,size_t size) {
+    FILE* fp;
+    char* line = NULL;
+    size_t len = 0;
+    ssize_t read;
+
+    fp = fopen(path ,"r");
+    if (fp == NULL)
+        return -1;
+
+    if (( read = getline(&line ,&len ,fp) ) != -1) {
+        if (size != 0)
+            memcpy(result ,line ,size);
+        else
+            memcpy(result ,line ,read - 1);
+    }
+
+    fclose(fp);
+    if (line)
+        free(line);
+    return 0;
+}
+
+/**
+ * 底层写文件
+ */
+static size_t write_file(const char* path ,char* buf ,size_t len) {
+    FILE* fp = NULL;
+    size_t size = 0;
+    fp = fopen(path ,"w+");
+    if (fp == NULL) {
+        return 0;
+    }
+    size = fwrite(buf ,len ,1 ,fp);
+    fclose(fp);
+    return size;
+}
+
+/**
+ * 读取温度
+ */
+int get_temperature(char* thermal_file ,int div) {
+    char buf[8] = { 0 };
+    if (read_file(thermal_file ,buf ,0) == 0) {
+        return atoi(buf) / div;
+    }
+    return -1;
+}
+
+/**
+ * 读取风扇速度
+ */
+int get_fanspeed(char* fan_file) {
+    char buf[8] = { 0 };
+    if (read_file(fan_file ,buf ,0) == 0) {
+        return atoi(buf);
+    }
+    return -1;
+}
+
+/**
+ * 设置风扇转速
+ */
+int set_fanspeed(int fan_speed ,char* fan_file) {
+    char buf[8] = { 0 };
+    sprintf(buf ,"%d\n" ,fan_speed);
+    return write_file(fan_file ,buf ,strlen(buf));
+}
+
+/**
+ * 计算风扇转速
+ */
+int calculate_speed(int current_temp ,int max_temp ,int min_temp ,int max_speed ,int min_speed) {
+    if (current_temp < min_temp) {
+        return 0;
+    }
+    int fan_speed = ( current_temp - min_temp ) * ( max_speed - min_speed ) / ( max_temp - min_temp ) + min_speed;
+    if (fan_speed > max_speed) {
+        fan_speed = max_speed;
+    }
+    return fan_speed;
+}
+
+/**
+ * 判断文件是否存在方法
+ */
+static int file_exist(const char* name) {
+    struct stat buffer;
+    return stat(name ,&buffer);
+}
+
+/**
+ *  信号处理函数
+ */
+void handle_termination(int signum) {
+    // 设置风扇转速为 0
+    set_fanspeed(0 ,fan_file);
+    exit(EXIT_SUCCESS); // 优雅地退出程序
+}
+
+/**
+ * 注册信号处理函数
+ */
+void register_signal_handlers( ) {
+    struct sigaction sa;
+    memset(&sa ,0 ,sizeof(sa));
+    sa.sa_handler = handle_termination;
+    sigemptyset(&sa.sa_mask);
+    sigaction(SIGINT ,&sa ,NULL);
+    sigaction(SIGTERM ,&sa ,NULL);
+}
+
+/**
+ * 主函数
+ */
+int main(int argc ,char* argv[ ]) {
+    // 解析命令行选项
+    int opt;
+    while (( opt = getopt(argc ,argv ,"T:F:s:t:m:d:D:v:") ) != -1) {
+        switch (opt) {
+            case 'T':
+                snprintf(thermal_file ,sizeof(thermal_file) ,"%s" ,optarg);
+                break;
+            case 'F':
+                snprintf(fan_file ,sizeof(fan_file) ,"%s" ,optarg);
+                break;
+            case 's':
+                start_speed = atoi(optarg);
+                break;
+            case 't':
+                start_temp = atoi(optarg);
+                break;
+            case 'm':
+                max_speed = atoi(optarg);
+                break;
+            case 'd':
+                temp_div = atoi(optarg);
+                break;
+            case 'D':
+                debug_mode = atoi(optarg);
+                break;
+            default:
+                fprintf(stderr ,"Usage: %s [option]\n"
+                    "          -T sysfs         # temperature sysfs file, default is '%s'\n"
+                    "          -F sysfs         # fan sysfs file, default is '%s'\n"
+                    "          -s speed         # initial speed for fan startup, default is %d\n"
+                    "          -t temperature   # fan start temperature, default is %d°C\n"
+                    "          -m speed         # fan maximum speed, default is %d\n"
+                    "          -d div           # temperature divide, default is %d\n"
+                    "          -v               # verbose\n" ,argv[0] ,thermal_file ,fan_file ,start_speed ,start_temp ,max_speed ,temp_div);
+                exit(EXIT_FAILURE);
+        }
+    }
+    // 检测虚拟文件是否存在
+    if (file_exist(fan_file) != 0 || file_exist(thermal_file) != 0) {
+        fprintf(stderr ,"File: '%s' or '%s' not exist\n" ,fan_file ,thermal_file);
+        exit(EXIT_FAILURE);
+    }
+
+    // 注册退出信号
+    register_signal_handlers( );
+
+    // 监控风扇
+    while (1) {
+        int temperature = get_temperature(thermal_file ,temp_div);
+        // 有效温度时设置风扇速度
+        if (temperature > 0) {
+            int fan_speed = calculate_speed(temperature ,MAX_TEMP ,start_temp ,max_speed ,start_speed);
+            set_fanspeed(fan_speed ,fan_file);
+        }
+        if (debug_mode) {
+            fprintf(stdout ,"Temperature: %d°C, Fan Speed: %d\n" ,get_temperature(thermal_file ,temp_div) ,get_fanspeed(fan_file));
+        }
+        sleep(5);
+    }
+    return 0;
+}