📅  最后修改于: 2022-03-11 15:04:40.581000             🧑  作者: Mango
#include
#include
#include
#include
int main()
{
pid_t pid;
int r;
char *ch=NULL;
char *ch1=NULL;
int readpipe[2];
int writepipe[2];
int a;
int b;
a=pipe(readpipe);
b=pipe(writepipe);
// check a and b
pid=fork();
// check pid
if(pid==0)
{ //CHILD PROCESS
close(readpipe[1]);
close(writepipe[1]);
read(readpipe[0],ch,sizeof(ch));
printf("\nREAD = %s",ch);
close(readpipe[0]);
ch1="YES";
write(writepipe[1],ch1,sizeof(ch1));
close(writepipe[1]);
}
else
{ //PARENT PROCESS
close(writepipe[0]);
close(writepipe[1]);
ch="HI!! YOU THERE";
write(readpipe[1],ch,sizeof(ch));
close(readpipe[1]);
read(writepipe[1],ch1,sizeof(ch1));
printf("\nACK RECEIVED %s",ch1);
close(writepipe[1]);
}
return 0;
}