Pipe realizes brother Process communication

Pipe implements interprocess communication, first closes the read-in end of the first child process, and then closes the write end of the second child process

  
 

   
  

  
#include<stdio.h>
   
  

  
#include<stdlib.h>
   
  

  
#include<unistd.h>
   
  

  

   
  

  

   
  

  
int main()
   
  

  
{
   
  

  
int fd[2];
   
  

  
pipe(fd);
   
  

  
pid_t pid = fork();
   
  

  
if(pid==0)
   
  

  
{
   
  

  
close(fd[0]);
   
  

  
write(fd[1],"Hello",6);
   
  

  
exit(0);
   
  

  
close(fd[1]);
   
  

  
}
   
  

  
pid_t pid2 = fork();
   
  

  
char buf[6]={0};
   
  

  
if(pid2==0)
   
  

  
{
   
  

  
close(fd[1]);
   
  

  
read(fd[0],buf,6);
   
  

  
printf(buf);
   
  

  
close(fd[0]);
   
  

  
exit(0);
   
  

  
}
   
  

  
else if(pid2>0)
   
  

  
{
   
  

  
close(fd[0]);
   
  

  
close(fd[1]);
   
  

  
exit(0);
   
  

  
}
   
  

  
}
  
 

From for notes (Wiz)

Pipe realizes brother Process communication