022.c

/*
..........................................................................................................................................
Name : 030.c
Author : SHRUTI VERMA
Description : Write a program to wait for data to be written into FIFO within 10 seconds, use select
                system call with FIFO.
Date : 17 Sep 2025
..........................................................................................................................................
*/

#include<unistd.h>
#include<stdlib.h>
#include<stdio.h>
#include<sys/types.h>
#include<fcntl.h>
#include<sys/stat.h>
#include<sys/time.h>
#include<sys/select.h>

int main() {
    fd_set rfds;
    struct timeval tv;
    tv.tv_sec=10;
    int fd = open("myFifo", O_WRONLY);
    FD_ZERO(&rfds);
    FD_SET(fd, &rfds); 
    if(!select(fd+1, &rfds, NULL, NULL, &tv)) {
        printf("waiting for data to be written....\n");
    } else {
        printf("available for writing\n");
        write(fd, "Hello there!", sizeof("Hello there!"));
        printf("data written");
    }

    printf("doing other task\n");
}
/*-----------------------------------------OUTPUT-----------------------------------------------
vumma@vumma-VivoBook-15-ASUS-Laptop-X507UF:~/Desktop/SS/HOL2$ gcc 022.c -o 022.out
vumma@vumma-VivoBook-15-ASUS-Laptop-X507UF:~/Desktop/SS/HOL2$ ./022.out
waiting for data to be written....
doing other task
*/