linux下等待多个信号返回值

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>

volatile sig_atomic_t signal_received = 0;
int received_signal = 0;

void signal_handler(int signum) {
    signal_received = 1;
    received_signal = signum;
}

int main() {
    struct sigaction sa;
    sa.sa_handler = signal_handler;
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = 0;

    // 注册信号处理函数
    sigaction(SIGINT, &sa, NULL);
    sigaction(SIGTERM, &sa, NULL);

    printf("Waiting for signals...\n");

    while (1) {
        if (signal_received) {
            printf("Received signal %d\n", received_signal);
            signal_received = 0;
            // 根据信号执行相应操作
            switch (received_signal) {
                case SIGINT:
                    printf("Handling SIGINT...\n");
                    // 执行清理工作
                    break;
                case SIGTERM:
                    printf("Handling SIGTERM...\n");
                    // 执行清理工作
                    exit(0);
            }
        }
        // 其他工作...
        sleep(1);
    }

    return 0;
}