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Код

#include <stdlib.h>
#include <stdio.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <unistd.h>
#include <string.h>
#include <netdb.h>

#define MAXBUFFSIZE 1024

void get_home_page(int socket_fd);

int main(int argc, char* argv[]){

    int socket_fd;
    struct sockaddr_in name;
    struct hostent* hostinfo;

    socket_fd = socket(PF_INET,SOCK_STREAM,0);
    name.sin_family = AF_INET;
    hostinfo = gethostbyname(argv[1]);

    if(hostinfo == NULL)
        return 1;
    
        if(!inet_aton(hostinfo->h_addr_list[0],&name.sin_addr)) return 1;
        name.sin_port = htons(80);

        if(connect(socket_fd,&name,sizeof(name)) == -1){
            perror("connect");
            return 1;
        }

    get_home_page(socket_fd);
    
    close(socket_fd);
    return 0;
}

void get_home_page(int socket_fd){
    char buffer[MAXBUFFSIZE];
    ssize_t number_characters_read;

    sprintf(buffer,"GET / HTTP/1.0\r\n\r\n");
    send(socket_fd,buffer,strlen(buffer),0);

    while(1){
        if(!(number_characters_read = recv(socket_fd,buffer,MAXBUFFSIZE,0)))
            return;
        fwrite(buffer,sizeof(char),number_characters_read,stdout);
    }
}