處理中斷：

Question

In the following program: 

Ctrl+z and ctrl+c both are interrupts. 
The code is supposed to handle any interrupt. 


Then why does only one of them(ctrl+c) work? 

代碼：

#include <signal.h> 
#include<stdio.h> 
void handler(int sig) 
{ 
    printf("Caught SIGINT\n"); 
    exit(0); 
} 

int main() 
{ 
    printf("\nYou can press ctrl+c to test this program\n"); 
    if (signal(SIGINT, handler) == SIG_ERR) 
    perror("signal error"); 

    pause(); /* wait for the receipt of a signal */ 

    exit(0); 
} 

由用戶輸入：必須是一箇中斷 輸出必須：夾縫SIGINT

Answer 1

由於按Ctrl-Z引起SIGTSTP，而不是一個SIGINT。

Answer 2

Ctrl-Z發送SIGTSTP。

觀光閱讀：

• http://en.wikipedia.org/wiki/Control-Z
• http://en.wikipedia.org/wiki/SIGTSTP#SIGTSTP