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int writenum;
int cmd;
memset(r_buf,0,sizeof(r_buf));
if(pipe(pipe_fd)<0)
{
printf("pipe create error\n");
return -1;
}
if((pid=fork())==0)
{
close(pipe_fd[0]);
close(pipe_fd.);
sleep(10);
exit();
}
else if(pid>0)
{
sleep(1); //等待子进程完成关闭读端的操作
close(pipe_fd[0]);//write
w_buf="111";
if((writenum=write(pipe_fd.,w_buf,4))==-1)
printf("write to pipe error\n");
else
printf("the bytes write to pipe is %d \n", writenum 页码：[1] [2] [3] [4] [5] [6] [7] 第2页、共7页 |
