How the CGI server works under Linux

#include <sys/socket.h> #include <netinet/in.h> #include <assert.h> #include <stdio.h># Include <unistd.h> #include <stdlib.h> #include <errno.h> #include <string.h>int main () {const    Char *ip= "127.0.0.1";    int port=12345;    struct SOCKADDR_IN address;    Bzero (&address,sizeof (address));    Address.sin_family=af_inet;    Inet_pton (AF_INET,IP,&AMP;ADDRESS.SIN_ADDR);    Address.sin_port=htons (port);    int Sock=socket (pf_inet,sock_stream,0);    ASSERT (sock>=0);    int Ret=bind (sock, (struct sockaddr *) &address,sizeof (address));    Ret=listen (sock,5);    struct SOCKADDR_IN client;    socklen_t client_addrlength=sizeof (client);    int connfd=accept (sock, (struct sockaddr *) &client,&client_addrlength);    if (connfd<0) {printf ("Errorno os:%d\n", errno);        } else {close (Stdout_fileno);        DUP (CONNFD);        printf ("abcd\n");    Close (CONNFD);    } close (sock); return 0;}

How CGI servers work under Linux