Write a C program that does the following. Parent sends “Hello, there”, child responds with “Hi, I’m child”. Then the parent sends “Are you available now?” and the child responds with “Yes, I’m”. Make appropriate usage of pipes.
#include <stdio.h>
#include <unistd.h>
#include <sys types.h="">
#include <stdlib.h>
#include <memory.h>
int main() {
//for parent to child
int parentToChild[2];
//for child to parent
int childToParent[2];
//string data
char message1[] = "Hello, there";
char message2[] = "Hi, I’m child";
char message3[] = "Are you available now?";
char message4[] = "Yes, I’m";
char readBuffer[120];
pipe(parentToChild);
pipe(childToParent);
int processId , bytes;
if((processId = fork())== -1){
printf("error while creating a child process");
}
if(processId !=0 ){
//parent process here
//send message from parent to child
close(parentToChild[0]);
write(parentToChild[1] , message1 , strlen(message1)+1);
//recieve message from child
close(childToParent[1]);
bytes = read(childToParent[0] , readBuffer , sizeof(readBuffer));
printf("%s", readBuffer);
// exit(1);
}
if(processId == 0){
//child process here
//send message from child to parent
close(childToParent[0]);
write(childToParent[1] , message2 , strlen(message2)+1);
//recive message from parent
close(parentToChild[1]);
bytes = read(parentToChild[0] , readBuffer , sizeof(readBuffer));
printf("%s",readBuffer);
// exit(1);
}
if(processId !=0 ){
//parent process here
//send message from parent to child
close(parentToChild[0]);
write(parentToChild[1] , message3 , strlen(message3)+1);
//recieve message from child
close(childToParent[1]);
bytes = read(childToParent[0] , readBuffer , sizeof(readBuffer));
printf("%s", readBuffer);
// exit(1);
}
if(processId == 0){
//child process here
//send message from child to parent
close(childToParent[0]);
write(childToParent[1] , message4 , strlen(message4)+1);
//recive message from parent
close(parentToChild[1]);
bytes = read(parentToChild[0] , readBuffer , sizeof(readBuffer));
printf("%s",readBuffer);
// exit(1);
}
return 0;
}
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