linux 下无名管道的用法：

#include "stdio.h"
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
typedef  unsigned int uint32;
void main()
{

  char buf[]="this is master data";
  printf("buf data len is %x
  ",(int)strlen(buf));
  int pip_info[2];
  if(pipe(pip_info))  //参数是int型数组，第一个表示读的ID,第二个表示写
  {
   printf("pip is faild\n");
   return;
  }
  pid_t pid = fork();
  int  test1=0;
  if(pid<0)
   {
     printf("creat process faild\n");
   }
   else if(pid ==0)
   {
      close(pip_info[0]);  //主进程关闭读，需要往里写文件
      write(pip_info[1],buf,strlen(buf));
   }
   else
   {    
        char buf_read[100];
        close(pip_info[1]);
        read(pip_info[0],buf_read,20);
        printf("creat child sucess\n %s",buf_read);
   }
}