c - SIGINT 和 SIGQUIT

Question

我想从我的代码中启动计算器应用程序，用sigint-2中断它显示它已被中断，再次启动它，然后用sigquit-9退出它，想法是在C代码中中断它所以不需要按 Ctrl+C 或 Ctrl+

Write a C program that accepts the signals SIGINT and SIGQUIT via a signalfd file descriptor. The program terminates after accepting a SIGQUIT signal.

C语言中启动一个进程，然后中断它，然后结束它的语法是什么？

Answer 1

我想这可能就是你要找的

//
//  main.c
//  Project 4
//
//  Found help with understanding and coding at
// http://www.thegeekstuff.com/2012/03/catch-signals-sample-c-code/
//

#include<stdio.h>
#include<signal.h>
#include<unistd.h>
//signal handling function that will except ctrl-\ and ctrl-c
void sig_handler(int signo)
{
    //looks for ctrl-c which has a value of 2
    if (signo == SIGINT)
        printf("\nreceived SIGINT\n");
    //looks for ctrl-\ which has a value of 9
    else if (signo == SIGQUIT)
        printf("\nreceived SIGQUIT\n");
}

int main(void)
{
    //these if statement catch errors
    if (signal(SIGINT, sig_handler) == SIG_ERR)
        printf("\ncan't catch SIGINT\n");
    if (signal(SIGQUIT, sig_handler) == SIG_ERR)
        printf("\ncan't catch SIGQUIT\n");
    //Runs the program infinitely so we can continue to input signals
    while(1)
        sleep(1);
    return 0;
}