reboot_temperature/reboot_temperature.c

#include "reboot_temperature.h"

static float get_temperature(char *path)
{
    char buffer[SIZE];
    FILE *fp = NULL;

    if ((fp = fopen(path, "r")) < 0)
        return -1;              /* 文件不存在, 则退出. */

    while (fgets(buffer, SIZE, fp) != NULL) ;

    fclose(fp);
    return atof(buffer) / (float)1000;
}

static int error_log(float l_t, int c_t, char *log_file, char *recv_mail, int _is, int _alert)
{
    time_t tmpcal_ptr = 0;
    struct tm *tmp_ptr = NULL;
    FILE *fp = NULL;
    FILE *fd = NULL;
    char buffer[SIZE];
    char temperature[SIZE];

    memset(buffer, 0, SIZE);
    memset(temperature, 0, SIZE);
    time(&tmpcal_ptr);
    tmp_ptr = localtime(&tmpcal_ptr);

    fd = fopen(log_file, "a+");
    if (fd == NULL)
        return -1;

    // 写入日志文件FD
    fprintf(fd, "%d.%d.%d %d:%d:%d %s %.3f℃ %s %.3f℃\n", (1900 + tmp_ptr->tm_year), (1 + tmp_ptr->tm_mon), tmp_ptr->tm_mday, tmp_ptr->tm_hour, tmp_ptr->tm_min, tmp_ptr->tm_sec, "Raspberry CPU temperature", l_t, "Restartable or shutdown temperature", (float)c_t);

    if (_is == 1) {
        if (_alert == 1) {
            // 关机活重启时
            sprintf(temperature, "%d.%d.%d %d:%d:%d %s %.3f℃ %s %.3f℃\n", (1900 + tmp_ptr->tm_year), (1 + tmp_ptr->tm_mon), tmp_ptr->tm_mday, tmp_ptr->tm_hour, tmp_ptr->tm_min, tmp_ptr->tm_sec, "Raspberry CPU temperature", l_t, "Restartable or shutdown temperature",
                    (float)c_t);
            sprintf(buffer, "gomail -r %s -s \"Raspberrypi Temperature\" -t \"%s\"", recv_mail, temperature);
            fp = popen(buffer, "r");
            pclose(fp);
            fp = NULL;
        } else {
            // 正常温度时
            if (tmp_ptr->tm_min >= 10 && tmp_ptr->tm_min < 12) {
                sprintf(temperature, "%d.%d.%d %d:%d:%d %s:%.3f℃\n", (1900 + tmp_ptr->tm_year), (1 + tmp_ptr->tm_mon), tmp_ptr->tm_mday, tmp_ptr->tm_hour, tmp_ptr->tm_min, tmp_ptr->tm_sec, "Raspberry CPU temperature", l_t);
                sprintf(buffer, "gomail -r %s -s \"Raspberrypi Temperature\" -t \"%s\"", recv_mail, temperature);
                fp = popen(buffer, "r");
                pclose(fp);
                fp = NULL;
            }
        }

    }

    fclose(fd);
    fd = NULL;

    return 0;
}

static int get_executable_path(char *processdir, char *processname, int len)
{
    char *filename;

    if (readlink("/proc/self/exe", processdir, len) <= 0)
        return -1;
    filename = strrchr(processdir, '/');
    if (filename == NULL)
        return -1;
    ++filename;
    strcpy(processname, filename);
    *filename = '\0';

    return (int)(filename - processdir);
}

int main(int argc, char *argv[], char **env)
{
    char buffer[SIZE];
    char log_file[SIZE];
    char *inifile = "conf/config.ini";
    char path[SIZE] = { 0 };

    char recv_mail[SIZE] = { 0 };
    char executable_filename[SIZE] = { 0 };
    (void)get_executable_path(path, executable_filename, sizeof(path));
    inifile = strcat(path, inifile);

    memset(buffer, 0, SIZE);
    memset(log_file, 0, SIZE);
    memset(recv_mail, 0, SIZE);

    if (daemon(1, 1) == -1) {
        perror("daemon");
        exit(1);
    }

    if (-1 == (nice(getinikeyint("global", "nice", inifile)))) // 进程优先级
        perror("nice");

    while (1) {
        getinikeystring("global", "thermal_zone", inifile, buffer); // 获取thermal_zone路径
        getinikeystring("global", "log_file", inifile, log_file); // 获取日志文件名
        getinikeystring("global", "recv_mail", inifile, recv_mail); // 获取接收者邮箱

        if (get_temperature(buffer) >= getinikeyint("global", "temperature", inifile)) // 达到重启或者关机温度
        {
            sync();
            if (getinikeyint("global", "off_power", inifile) == 1) {
                error_log(get_temperature(buffer), getinikeyint("global", "temperature", inifile), log_file, recv_mail, getinikeyint("global", "is_alert", inifile), 1);
                return reboot(RB_POWER_OFF);    // 关机
            } else {
                error_log(get_temperature(buffer), getinikeyint("global", "temperature", inifile), log_file, recv_mail, getinikeyint("global", "is_alert", inifile), 1);
                return reboot(RB_AUTOBOOT);     // 重启
            }
        } else                  // 未达到重启或者关机温度
        {
            error_log(get_temperature(buffer), getinikeyint("global", "temperature", inifile), log_file, recv_mail, getinikeyint("global", "is_alert", inifile), 0);
        }

        // 等待
        sleep(getinikeyint("global", "second", inifile));
    }

    return 0;
}