On Fri, 2002-02-22 at 15:18, insomniak wrote:
> Hi
> If you are looking to find out is a host is alive try this bit of code.
>
> $host = www.google.com;
> $ip=join ".",unpack("C4",(gethostbyname($host))[4]);
>
> $ip will be empty if host is dead
>
> from command line
>
> perl -e "print join \".\",unpack(\"C4\",(gethostbyname(@ARGV[0]))[4]);"
> www.google.com
This will not work if the host can be resolved, but is not up.
gethostbyname does a DNS lookup, DNS lookups depends on an entry in the
nameserver, not the host being available.
Unfortunately I cant supply a working method... :(
Kind regards
Johan.
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