Linux多线程实例 定时重启httpd和mysqld

#include <stdio.h>
#include <pthread.h>

void *start_routine(void *arg)
{
        while(1)
        {
                system("service httpd restart");
                system("service mysqld restart");
                sleep(60*60*6);
        }

        int retvalue = 0;
        pthread_exit((void*)&retvalue);
}

int main()
{
        pthread_t pt;
        int ret;
        ret = pthread_create(&pt,NULL,(void*)start_routine,0);
        if(ret != 0)
        {
                printf("create thread error");
                return 0;
        }
        int *ret_join = NULL;
        pthread_join(pt,(void*)&ret_join);
        printf("retvalue: %d\n",*ret_join);
        return 0;
}

gcc test.c -o test -lpthread