Re: If gethostbyname fails it never recovers

"Andrew" == Andrew DeFaria <Andrew@xxxxxxxxxxx> writes:

Andrew> So I tried writing a script that would monitor this. The script calls
Andrew> gethostbyname for google.com every 15 minutes and logs the status. When
Andrew> gethostbyname fails however it never comes back. My ISP and internet
Andrew> connection may come back and nslookup at the command line will work fine. But
Andrew> my script will report failure at the next and following 15 minute
Andrew> intervals. This is very unexpected. What am I doing wrong and is there a way
Andrew> to "reset" things so that it will start working again.

Andrew> Here's a snippet:

Andrew> sub CheckDNS {
Andrew> my $host = shift;

Andrew> my @ipaddrs = gethostbyname $host;
Andrew> my $status = $?;

Andrew> if ($status ne 0 and $debug) {
Andrew> debug "Host: $host ($status)";
Andrew> } # if

Andrew> return $status
Andrew> } # CheckDNS

Andrew> CheckDNS is called every 15 minutes with "google.com" as a parm. When a
Andrew> failure happens $status = 2 and remains = 2 forever.

$? is not set for a gethostbyname failure. In fact, I'm not sure
anything is actually set.

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