All,
Given the following Perl script:
#!/usr/bin/perl
%dig = (
solaris => "/usr/sbin/dig",
linux => "/usr/bin/dig",
darwin => "/usr/bin/dig"
);
$DIG = $dig{"$^O"};
$DOMAIN = "example.com";
$DNS = "ns.example.com";
$DIGCMD = qq/$DIG \@$DNS $DOMAIN axfr/;
open DIG, "$DIGCMD|" or die "$DIG: $!\n";
while (<DIG>) {
next if (/^;/); # Skip any comments
# If we match a CNAME record, we have an alias to something.
# $1 = alias (CNAME), $2 = canonical hostname
if (/^(\S+)\.${DOMAIN}\.\s+\d+\s+IN\s*CNAME\s+(\S+)\.${DOMAIN}\.$/) {
# Push an alias (CNAME) onto an array indexed on canonical hostname
push(@{$cnames{$2}}, $1);
}
# Here's a standard A (canonical hostname) record
# $1 = canonical hostname, $2 = IPv4 address
if (/^(\S+)\.${DOMAIN}\.\s+\d+\s+IN\s*A\s+(\S+)$/) {
$ip{$1} = $2;
}
}
close DIG;
# Format and display it like niscat hosts:
# canonicalHostname alias1 [alias2 aliasN] ipAddress
for $host (sort keys %ip) {
print "$host ";
if (defined(@{$cnames{$host}})) {
print join(' ', @{$cnames{$host}});
print " ";
}
print "$ip{$host}\n";
}
exit 0;
Will someone please provide some insight on how to accomplish that task in
Python? I am unable to continually (i.e. it stops after displaying a single
line) loop through the output while testing for the matches on the two
regular expressions. Thank you.
-- Gary Chambers
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