Kill命令模拟1

#include<sys/types.h>

#include<signal.h>

#include<stdio.h>

#include<stdlib.h>

#include<unistd.h>



int main(int argc,char* argv[])

{

    pid_t pid_id=0;

    char* pid;

    if(argc!=2)

    {

        fprintf(stderr,"Usage: kill pid \n");

        exit(1);

    }

    pid=argv[1];

    while((*pid)!='\0')

    {

        pid_id=pid_id*10+(*pid-48);

        pid++;

    }

    if(kill(pid_id,SIGINT))

    {

        fprintf(stderr,"Could not kill pid %d \n",pid_id);

        exit(1);

    }

    else

    {

        printf("Kill the pid %d successfully!\n",pid_id);

    }

    exit(0);

}

功能只有结束给定PID的进程

用法:  kill pid