Programming

int already_there(client *current, char *username) {
    while(current) {
        if (strcmp(current->client_name, username)==0) return(1);
        if (current->next==NULL) break;
        else current = current->next;
    }
    return(0);
}

    client *current=NULL;
    current = add_client("tttttttt", current, client_socket_fd);
    current = add_client("ttttttttt", current, client_socket_fd);
    printf("HERE\n");
    write(1,current->client_name,9);
    printf("\n");
    write(1,current->next->client_name,8);
    printf("\nHERE\n");

client *add_client(char *username, client *client_list, int client_socket_fd) {
    client *new_client = (client *)malloc(sizeof(client)); 
    new_client->client_name = username;
    new_client->client_socket_fd = client_socket_fd;
    new_client->next = client_list;
    return new_client;
}

int already_there(client *client_list, char *username) {
    if (client_list == NULL) return(0);
    else if (strcmp(client_list->client_name, username)==0) return(1);
    else return already_there(client_list->next, username);
}