Programming

int pos=0;
bzero(buffer,MAXDATASIZE);

// Stop once we have an entire single record
while((buffer[pos] != '\r') && (pos < MAXDATASIZE))
{
        // Put new data 'pos' bytes ahead, so we don't overwrite the old
        ssize_t b=read(socket_fd, buffer+pos, 1); 
        if(b > 0) pos+=b;
        else break; // b<=0 means socket closed or socket error, so give up.
}

// Remove the carriage return
buffer[pos-1]='\0';

void send_message(int client_socket_fd, char *message, int length) {
    size_t bytes = write(client_socket_fd, message, length);
    if (bytes != length) error("ERROR writing to socket");
}

void send_message(int client_socket_fd, char *message, int length) {
    int pos=0;

    while(pos < length)
    {
        size_t bytes = write(client_socket_fd, message+pos, length-pos);
        if(bytes <= 0)
        {
            perror("Socket error");
            return;
        }

        pos += bytes;
    }
}