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host: invalid option -- W
host: usage error (unrecogized switch)
Usage: host [-adlrwv] [-t querytype] [-c class] host [server]
        -a is equivalent to '-v -t *'
        -c class to look for non-Internet data
        -d to turn on debugging output
        -l to turn on 'list mode'
        -r to disable recursive processing
        -s recursively chase signature found in answers
        -t querytype to look for a specific type of information
        -v for verbose output
        -w to wait forever until reply
host: invalid option -- W
host: usage error (unrecogized switch)
Usage: host [-adlrwv] [-t querytype] [-c class] host [server]
        -a is equivalent to '-v -t *'
        -c class to look for non-Internet data
        -d to turn on debugging output
        -l to turn on 'list mode'
        -r to disable recursive processing
        -s recursively chase signature found in answers
        -t querytype to look for a specific type of information
        -v for verbose output
        -w to wait forever until reply


 

// adapted from code found here: http://www.php.net/gethostbyaddr
function ip_to_hostname( $ip )
{
        global $_GUS_CONF;
       
               
        switch( $_GUS_CONF['host_lookup'] )
        {
                case 'host':
                        $timeout = $_GUS_CONF['host_lookup_timeout'];
                       
                        $output = `host -W $timeout $ip`;
                       
                        if ( ereg( '.*pointer ([A-Za-z0-9.-]+)\..*', $output, $regs ) )
                                return $regs[1];
                               
                        break;
 

# man host
SEE ALSO
     named(8),  resolver(5).

BUGS
     Unexpected effects can happen when you type a name that is not part of
     the local domain.  Please always keep in mind the fact that the local do­
     main name is tacked onto the end of every name, unless it ends in a dot.
     Only if this fails is the name used unchanged.

     The ``-l'' option only tries the first name server listed for the domain
     that you have requested.  If this server is dead, you may need to specify
     a server manually. E.g., to get a listing of foo.edu, you could try

           host -t ns foo.edu

     to get a list of all the name servers for foo.edu, and then try

           host -l foo.edu xxx

     for all ``xxx'' on the list of name servers, until you find one that
     works.

4th Berkeley Distribution      December 15, 1994