Bidirectional processes by FIFO pipeline - c

Question

I am asked to do two chat programs so that user1 & user2 can send and receive the messages. The program should ask the user if he needs to continue chatting or no after every message is sent,
and If no, a goodbye message should be printed on the standard
output to inform the other user that chatting is terminated. Also, each user is allowed to send only up to 5 messages.
I created the next codes for the user1 and user2
the code of user 1:
"""
//Chat 1
// This side writes first, then reads
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
int main()
{
int fd, count=0,sendAgain=0;
char * myfifo = "/tmp/myfifo";// Declare the FIFO file pathname
// Creating the named file(FIFO)
mkfifo(myfifo, 0666); // mkfifo(<pathname>, <permission>)
char Arr1[80], Arr2[80];
while (1)
{
// ***Open FIFO for write only****
fd = open(myfifo, O_WRONLY);
while (count!=5){
count++ ;
printf("\nYour message: ");
fgets(Arr1, 80, stdin);// Take an input Arr1 from user with maximum 100 length
write(fd, Arr1, strlen(Arr1)+1);// Write the input Arr1 on FIFO
printf("Do you want to continue?[1 or 2]\n1-Yes\n2-No\nAnswer: ");
scanf("%d",&sendAgain);
getchar();
if (sendAgain==2) {
break;
}
}
write(fd, "bye", strlen("bye")+1);
close(fd);// close the FIFO
// ***Open FIFO for read only****
fd = open(myfifo, O_RDONLY);
read(fd, Arr2, sizeof(Arr2));// Read from FIFO
printf("User2: %s\n", Arr2);// Print the message that was read
close(fd);// close the FIFO
}
return 0;
}
"""
and the code of the user 2
"""
//Chat 2
// This side reads first, then writes
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
int main()
{
int fd1, count=0,YN=0;
char * myfifo = "/tmp/myfifo";// Declare the FIFO file pathname
// Creating the named file(FIFO)
mkfifo(myfifo, 0666); // mkfifo(<pathname>, <permission>)
char str1[80], str2[80];
while (1)
{
// ***Open FIFO for read only****
fd1 = open(myfifo,O_RDONLY);
read(fd1, str1, 80);
printf("User1: %s\n", str1);// Print the message that was read
close(fd1);
// ***Open FIFO for read only****
fd1 = open(myfifo, O_WRONLY);
while (count!=5){
count++ ;
printf("\nYour message: ");
fgets(str2, 80, stdin);// Take an input WriteArr from user with maximum 100 length
write(fd1, str2, strlen(str2)+1);// Write the input WriteArr on FIFO
printf("Do you want to continue?[enter 1 or 2]\n1-Yes\n2-No\nAnswer: ");
scanf("%d",&sendAgain);
getchar();
if (sendAgain==2) {
break;
}
}
write(fd1, "bye", strlen("bye")+1);
close(fd1);// close the FIFO
}
return 0;
}
"""
However, I faced a problem after I wrote a message and was asked if I wanted to continue, it allows me to write a message again if I said yes but without reading it from the other user and the program is stopping at this point. Also, if I chose "No" it ends the program without printing "bye" or even waiting for the other's user turn to write!
Output1 if yes entered
Output2