windows下面可以主线程while loop接受input;但是觉得很丑。
linux没办法这样,可以用注册信号的办法。实现起来也不难:
#include "stdio.h"
#include "unistd.h"
#include "signal.h"
#include "error.h"
volatile bool isStop = false;
static void handle_sig(int signum)
{
    if (SIGUSR1 == signum) {
        isStop = true;
        printf("get sig %d and stop app\n", signum);
    }
}
int main()
{
    struct sigaction sga;
    sga.sa_flags = 0;
    sga.sa_handler = handle_sig;
    sigaction(SIGUSR1, &sga, NULL);
    while (true) {
        if (isStop) 
            break;
    }
    printf("do some clean work here!\n");
}原文地址:http://blog.csdn.net/boyxiaolong/article/details/24706885