Передача от клиента к серверу и от сервера к клиенту через канал fifo()

#include <sys/types.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#define FIFO "fifo.1"
#define FIFO1 "fifo.2"
#define MAXBUFF 100

#include "fifo.h"
 
int main(void){
int fd, n,fd1;
char buff[MAXBUFF];
FILE *fp;
char buff1[MAXBUFF];
char filename[20];
int i;
int exit = 0;
if(mknod(FIFO, S_IFIFO | 0666, 0)<0){
printf("FIFO CREATE ERROR");}
if(mknod(FIFO1, S_IFIFO | 0666, 0)<0){
printf("FIFO CREATE ERROR");}
 
if((fd=open(FIFO, O_RDONLY))<0) {
printf("FIFO OPEN ERROR");}
 
if((fd1=open(FIFO1, O_WRONLY)) < 0){
printf("FIFO OPEN ERROR");}
 
ssize_t num_bytes = read(fd, buff, sizeof(buff));
printf("\nstroka — %s\n", buff);
i=strlen(buff);
while(i>=0)
{
printf("%d",buff1[i]);
i=i-1;
} 
 
if(write(fd1,buff1, sizeof(buff1)) != sizeof(buff1)) {
printf("WRITE ERROR"); }
 
//memcpy(buff1,buff,100);
 
//printf("strsd-%s",buff1);
 
close(fd1);}

#include "fifo.h"
int main(void){
 
int fd,n,fd1;
char buff[MAXBUFF];
char buff1[MAXBUFF];
char mas[]={"aaaassssss"};
 
if((fd=open(FIFO, O_WRONLY)) < 0){
printf("FIFO OPEN ERROR"); exit(1);}
 
if((fd1=open(FIFO1, O_RDONLY))<0) {
printf("FIFO OPEN ERROR");
exit(1);}
 
int i;
int exit = 0;
while(exit == 0){
int ch;
printf("1 \n");
 
 
printf("----> ");
scanf("%d",&ch);
printf("\n");
 
if(ch == 1){
if(write(fd,mas, sizeof(mas)) != sizeof(mas)) {
printf("WRITE ERROR"); }
 
getchar();
}
ssize_t num_bytes = read(fd1, buff1, sizeof(buff1));
printf("\nstroka — %d\n", buff);
if(ch == 2){
exit=1;
getchar();}
if(ch != 1&&ch!=2){
printf("ERROR: Invalid input!\n");
getchar();
}
 
}
close(fd);
 
}

while(i>=0)
{
printf("%d",buff1[i]);
i=i-1;
}

ssize_t num_bytes = read(fd1, buff1, sizeof(buff1));
printf("\nstroka — %s\n", buff1);

while(i>=0)
{
printf("%с",buff[i]);
i=i-1;
 
}
memcpy(buff1,buff,100);
 
printf("strsd-%s",buff1);