020.c

/*
..........................................................................................................................................
Name : 030.c
Author : SHRUTI VERMA
Description : Write two programs so that both can communicate by FIFO -Use one way communication.
Date : 16 Sep 2025
..........................................................................................................................................
*/
#include<unistd.h>
#include<stdlib.h>
#include<stdio.h>
#include<sys/types.h>
#include<fcntl.h>
#include<sys/stat.h>

int main() {
    int choice = 0;
    int fd = -1;
    mkfifo("myFifo2", 0666);
    printf("1. Writer process\n2. Reader process\nEnter your choice : ");
    scanf("%d", &choice);
    if(choice == 1) {
        fd = open("myFifo2", O_WRONLY);
        char msg[30];
        scanf(" %[^\n]", msg);
        write(fd, msg, sizeof(msg));
        close(fd);     
    } else {
        fd = open("myFifo2", O_RDONLY);
        char buf[100];
        read(fd, buf, sizeof(buf));
        printf("Data from writer : %s\n", buf);
        close(fd);
    }
}

/*------------------------------------------------OUTPUT---------------------------------------------
terminal 1
vumma@vumma-VivoBook-15-ASUS-Laptop-X507UF:~/Desktop/SS/HOL2$ gcc 020.c -o 020.out
vumma@vumma-VivoBook-15-ASUS-Laptop-X507UF:~/Desktop/SS/HOL2$ ./020.out
1. Writer process
2. Reader process
Enter your choice : 1
hi guys

terminal 2
vumma@vumma-VivoBook-15-ASUS-Laptop-X507UF:~/Desktop/SS/HOL2$ gcc 020.c -o ./020.out
vumma@vumma-VivoBook-15-ASUS-Laptop-X507UF:~/Desktop/SS/HOL2$ ./020.out
1. Writer process
2. Reader process
Enter your choice : 2
Data from writer : hi guys
*/