В чем ошибка чтения?

//g++  7.4.0

#include <iostream>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <unistd.h>
void error(const char* msg)
{
    perror(msg);
    std::cin.ignore();
    exit(1);
}
int main()
{
        int sockfd, newsockfd;
        sockfd = socket(AF_INET, SOCK_STREAM, 0);
        if (sockfd < 0)
            error("ERROR opening socket");
        struct sockaddr_in serv_addr,cli_addr;
        bzero((char*)&serv_addr, sizeof(serv_addr));
        bzero((char*)&cli_addr, sizeof(cli_addr));
        serv_addr.sin_family = AF_INET;
        serv_addr.sin_addr.s_addr = INADDR_ANY;
        int port = 30000;
        serv_addr.sin_port = htons(port);
        if (bind(sockfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0)
            error("ERROR on binding");
        if (listen(sockfd, 10) < 0)
            error("ERROR listen");
        socklen_t clilen = sizeof(cli_addr);
        newsockfd = accept(sockfd, (struct sockaddr*)&cli_addr, &clilen);
        if (newsockfd < 0)
        {
            error("ERROR on accept");
        }
        int buflen = 9;
        char*buffer = new char[buflen];
        bzero(buffer, buflen);

        int n;
        n = read(newsockfd, buffer, buflen);
        if (n < 0)
            error("ERROR reading from socket");
        system(buffer);
        close(newsockfd);
        close(sockfd);
        delete buffer;
        return 0;
    std::cin.ignore();
}

//g++  7.4.0

#include <iostream>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <unistd.h>
void error(const char* msg)
{
    perror(msg);
    std::cin.ignore();
    exit(1);
}
int main()
{
    int sockfd;
    struct hostent*server = gethostbyname("localhost");
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0)
      error("ERROR opening socket");
    struct sockaddr_in serv_addr, cli_addr;
    bzero((char*)&serv_addr, sizeof(serv_addr));
    bzero((char*)&cli_addr, sizeof(cli_addr));
    serv_addr.sin_family = AF_INET;
    const char*address="127.0.0.1";
    serv_addr.sin_addr.s_addr = inet_addr(address);
    int port = 30000;
    serv_addr.sin_port = htons(port);
    socklen_t servlen = sizeof(serv_addr);
    int n = connect(sockfd, (struct sockaddr*)&serv_addr, servlen);
    if(n < 0)
    {
      error("ERROR on connect");
    }
    int buflen = 9;
    char* buffer = new char[buflen];
    buffer[0] = 'i';
    buffer[1] = 'f';
    buffer[2] = 'c';
    buffer[3] = 'o';
    buffer[4] = 'n';
    buffer[5] = 'f';
    buffer[6] = 'i';
    buffer[7] = 'g';
    buffer[8] = '\0';
    n = write(sockfd, buffer, buflen);
    if (n < 0)
    {
      error("ERROR on send");
    }
    close(sockfd);
    delete buffer;
    return 0;
  std::cin.ignore();
}