Wählen Sie mit(..) auf client

Ich versuche zu implementieren, wählen Sie(..) auf der client-Seite mit dem erstellen von mehreren sockets abgesehen von den TCP-socket zu empfangen(..) vom server. Ich möchte Daten empfangen, die auf unterschiedlichen recv(..) von verschiedenen sockets erstellt mit select(..). Der code scheint nicht zu funktionieren, wie erwartet. Bitte helfen Sie. Danke!

#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<sys/socket.h>
#include<sys/types.h>
#include<fcntl.h>
#include<sys/stat.h>
#include<netinet/in.h>
#include <arpa/inet.h>

int main(int argc, char *argv[])
{
    int count, createsocket, chunks, newsocket[5], i;
    int bufsize = 2048;
    char *buffer = malloc(bufsize);
    char fname[256];
    struct sockaddr_in address;
    fd_set master;
    fd_set read_fds;
    int fdmax, j; 

    FD_ZERO(&master);
    FD_ZERO(&read_fds);

    if((createsocket = socket(AF_INET, SOCK_STREAM, 0)) > 0)
    {
        printf("Socket created.\n");
    }

    address.sin_family = AF_INET;
    address.sin_port = htons(15001);
    inet_pton(AF_INET, argv[1], &address.sin_addr);

    if(connect(createsocket, (struct sockaddr*)&address, sizeof(address)) == 0)
    {
        printf("Connected to server %s\n",argv[1]);
    }

    printf("Enter the file name to download\n");
    scanf("%s",fname);

    send(createsocket, fname, sizeof(fname), 0);

//   printf("Enter the chunks of file to receive");
    printf("waiting to receive the file from server..\n");

    //code to create a new socket based on the number of chunks required

    for(i=0;i<4;i++)
    {
        if((newsocket[i] = socket(AF_INET, SOCK_STREAM, 0)) > 0)
        {
                printf("new Socket %d created.\n", i);
        }
    }

    FD_SET(createsocket, &master);
    fdmax = createsocket;

    for(;;)
    {
        read_fds = master;
        if(select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1){
            perror("select");
            exit(2);
        }
        for(i=0; i<=fdmax; i++){
            if(FD_ISSET(i, &read_fds)) {
                if(i == createsocket) {
                    printf("something is happening..\n");

                    if(newsocket[i] == -1){
                        printf("socket %d\n",i);
                    } else {
                        FD_SET(newsocket[i], &master);
                        if(newsocket[i] > fdmax) {
                            fdmax = newsocket[i];
                        }
                        printf("still something is going on..\n");
                    }
                } else {
                    printf("Doing something..\n");
                    for(j = 0; j <= fdmax; j++) {
                        if(FD_ISSET(j, &master)) {
                            if(j!= createsocket && j!= i) {
                                if((count = recv(createsocket, buffer, bufsize, 0)) > 0) {
                                    perror("recv");
                                } else {
                                    write(1, buffer, count);
                                }

                            }
                        }
                    }
                }
            }
        }
    }



//   while((count = recv(createsocket, buffer, bufsize, 0)) > 0)
//       write(1, buffer, count);

    printf("EOF.\n");

    for(i=0;i<4;i++)
    {
        close(newsocket[i]);
    }
    return close(createsocket);
}