pipe_p.c

Linux大学上机源码学习

#include"unistd.h"
#include"stdio.h"
#include"string.h"
main()
{
int fd[2],pid,pir,n,i;
char b[20]="dsf",dat[20]="hello!";
pipe(fd);
pid=fork();
if(pid>0)
{
     pir=fork();
     if(pir==0)
	   while (b[0]!='a'){
		 n=read(fd[0],b,20);
	     printf("child2 :%s\n",b);
	     sleep(1);}
     else
       {wait(0); 
       wait(0);
       printf("parent is kill!\n");
       }
}
 else
  {while(dat[0]!='a'){
	  scanf("%s",dat);
	  write(fd[1],dat,strlen(dat));
	  sleep(1);
	 }
  printf("child1 is writing\n");
}
}