killer.c

基于网络编程的例子

/*
 * killer.c - Killing other processes
 */
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>

int main(void)
{
    pid_t child;
    int status, retval;
    
    if((child = fork()) < 0) {
        perror("fork");
        exit(EXIT_FAILURE);
    }
    if(child == 0) {
        /* Sleep long enough to be killed */
        sleep(1000);
        exit(EXIT_SUCCESS);
    } else {
        /* Use WNOHANG so wait will return */
        if((waitpid(child, &status, WNOHANG)) == 0) {
            retval = kill(child, SIGKILL);
            if(retval) {
                /* Kill failed, so wait on child to exit */
                puts("kill failed");
                perror("kill");
                waitpid(child, &status, 0);
            } else 
                printf("%d killed\n", child);
        }
    }
    exit(EXIT_SUCCESS);
}