C PROGRAM FOR INTER-PROCESS COMMUNICATION USING SINGLE PIPE (WITH ALGORITHM)

C PROGRAM FOR INTER-PROCESS COMMUNICATION USING SINGLE PIPE (WITH ALGORITHM)

AIM : TO IMPLEMENT INTERPROCESS COMMUNICATION USING SINGLE PIPE

ALGORITHM :

STEP 1 : START

STEP 2 : DECLARE P[2],PID,BUFF

STEP 3 : CALL THE SYSTEM CALL PIPE(P)

STEP 4 : CREATE A PROCESS

STEP 5 : IF THE PROCESS IS CHILD THEN GO TO STEP 6

STEP 6 : READ THE MESSAGE FOR PARENT

STEP 7 : WRITE THE MESSAGE TO PARENT

STEP 8 : CALL SLEEP()

STEP 9 : READ THE MESSAGE FROM PARENT

STEP 10 : PRINT THE MESSAGE FROM PARENT

STEP 11 : IF THE PROCESS IS PARENT, GO TO STEP 12

STEP 12 : READ THE MESSAGE FROM CHILD

STEP 13 : DISPLAY THE MESSAGE FROM CHILD

STEP 14 : READ THE MESSAGE FROM CHILD

STEP 15 : WRITE THE MESSAGE TO CHILD

STEP 16 : STOP


PROGRAM :

#include<stdio.h>
#include<string.h>
void main()
{
     int pid,p[2];
     char buff[20];
     pipe(p);
     pid=fork();
     if(pid==0)
     {
         printf("\n child process \n");
         printf("\n enter the message to parent : \n");
         gets(buff);
         write(p[1],buff,sizeof(buff));
         sleep(8);
         printf("\n message from parent : \n");
         read(p[0],buff,sizeof(buff));
         puts(buff);
         close(p[0]);
    }
    else
    {
         printf("\n parent process ");
         read(p[0],buff,sizeof(buff));
         printf("\n message from child : ");
         puts(buff);
         sleep(4);
         printf("\n enter the message to child : ");
         gets(buff);
         write(p[1],buff,sizeof(buff));
         sleep(2);
         close(p[0]);
    }
}


OUTPUT :

parent process
child process
enter the message to parent :
hai
message from child :
hai
enter the message to child :
hai
message from parent : hai