分类: C/C++
2010-12-08 19:16:44
#include
#include
#include
#include
#include
#include
int main()
{
int pipe_fd[2];
pid_t pid;
char buf_r[100];
char* p_wbuf;
int r_num;
memset(buf_r,0,sizeof(buf_r));
/*创建管道*/
if(pipe(pipe_fd)<0)
{
printf("pipe create error\n");
return -1;
}
/*创建子进程*/
if((pid=fork())==0) //子进程执行序列
{
printf("\n");
close(pipe_fd[1]);//子进程先关闭了管道的写端
sleep(2); /*让父进程先运行,这样父进程先写子进程才有内容读*/
if((r_num=read(pipe_fd[0],buf_r,100))>0)
{
printf("%d numbers read from the pipe is %s\n",r_num,buf_r);
}
close(pipe_fd[0]);
exit(0);
}
else if(pid>0) //父进程执行序列
{
close(pipe_fd[0]); //父进程先关闭了管道的读端
if(write(pipe_fd[1],"Hello",5)!=-1)
printf("parent write1 Hello!\n");
if(write(pipe_fd[1]," Pipe",5)!=-1)
printf("parent write2 Pipe!\n");
close(pipe_fd[1]);
waitpid(pid,NULL,0); /*等待子进程结束*/
exit(0);
}
return 0;
}