OS Echo pipe C Program

Operating Systems Lab Manual / OS Echo pipe C Program

Program Name:
Write a program for the use of Echo Pipe

Theory

Program Code

#include<unistd.h> 
#include<stdio.h> 
#include<stdlib.h>
#include<string.h> 
int main()
{
int p1[2],p2[2],pid;
char msg1[10]="using Echo Pipe",msg2[10];
pipe(p1);
pipe(p2); 
pid=fork(); 
if(pid==0)
{
printf("\nChild Process Initiated\n"); close(p1[0]);
close(p2[1]); 
write(p1[1],msg1,sizeof(msg1)); 
sleep(2); 
read(p2[0],msg2,sizeof(msg2));
printf("\nCHILD PROCESS reading from pipe %s \n",msg2);
}
else
{
printf("\nParent Process Initiated\n");
close(p1[1]);
close(p2[0]); 
read(p1[0],msg1,sizeof(msg1)); 
strcpy(msg2,msg1); 
write(p2[1],msg2,sizeof(msg2));
printf("\nParent Process reading from pipe %s \n",msg2);
}
return 0;
}

Input:
Using Echo Pipe

Output:
Child Process Initiated
Parent Process Initiated
Parent Process reading from pipe Using Echo Pipe
CHILD PROCESS reading from pipe Using Echo Pipe

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