SIGINT和SIGQUIT

Question

我想从我的代码中启动计算器应用程序，用sigint-2中断它表明它已被中断，再次启动它，然后用sigquit-9退出它，想法是在它内部中断它C代码，因此没有必要按ctrl-c或ctrl- \

编写一个C程序，通过signalfd文件描述符接受信号SIGINT和SIGQUIT。程序在接受SIGQUIT信号后终止。

Answer 1

我想这可能是你在找什么

// 
// 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; 
}