Ticket #8320: ghbn.c

/**
 *  Test gethostbyname.function by DKnoto, 2012/02/04.
 */

#include <stdio.h>
#include <errno.h>
#include <netdb.h>
#include <sys/socket.h>

extern int h_errno;

int main( int argc, char *argv[] )
{
    char *hn = NULL;
    struct hostent *he = NULL;

    /**
     *  Analiza ilości argumentów.
     */
    switch( argc )
    {
        case 2:
        {
            hn = argv[1];
            break;
        }
        case 1:
        {
            hn = "localhost";
            break;
        }
        default:
        {
            printf( "Erro: bad arguments number\n" );
            return 1;
            break;
        }
    }

    /**
     *
     */
    printf( "Host in \"%s\"\n", hn );
    he = gethostbyname( hn );
    if( he )
    {
        int i = 0;
        printf( "  h_name == \"%s\"\n", he->h_name );
        while( he->h_aliases[i] )
        {
            printf( "  h_aliases[%d] == \"%s\"\n", i, he->h_aliases[i] );
            i++;
        }
        printf( "  h_addrtype == %d\n", he->h_addrtype );
        printf( "  h_length   == %d\n", he->h_length );

        i = 0;
        while( he->h_addr_list[i] )
        {
            int j = 0;
            printf( "  h_addr_list[%d] == %d", i,
                (unsigned char)(he->h_addr_list[i][j]) );
            for( j++; j < he->h_length; j++ )
            {
                printf( ".%d", (unsigned char)(he->h_addr_list[i][j]) );
            }
            printf( "\n" );
            i++;
        }
    }
    else
    {
        printf( "  gethostbyname( \"%s\" ): Error, errno == %d, h_errno == %d\n",
                hn, errno, h_errno );
    }

    return 0;
}

/**
 *  EOF
 */