/* inetaton.c: *  * Example using inet_aton(3) : */#include <stdio.h>#include <unistd.h>#include <stdlib.h>#include <errno.h>#include <string.h>#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>/* * This function reports the error and * exits back to the shell : */static voidbail(const char *on_what) {    fputs(on_what,stderr);    fputc('\n',stderr);    exit(1);}intmain(int argc,char **argv) {    int z;    struct sockaddr_in adr_inet;/* AF_INET */    int len_inet;               /* length  */    int sck_inet;                /* Socket */    /* Create a Socket */    sck_inet = socket(AF_INET,SOCK_STREAM,0);    if ( sck_inet == -1 )        bail("socket()");    /* Establish address */    memset(&adr_inet,0,sizeof adr_inet);    adr_inet.sin_family = AF_INET;    adr_inet.sin_port = htons(9000);    if ( !inet_aton("127.0.0.23",              &adr_inet.sin_addr) )        bail("bad address.");    len_inet = sizeof adr_inet;    /* Bind it to the socket */    z = bind(sck_inet,        (struct sockaddr *)&adr_inet,        len_inet);    if ( z == -1 )        bail("bind()");    /* Display our socket address */    system("netstat -pa --tcp 2>/dev/null"        "| grep inetaton");    return 0;}