You want to find your (fully qualified) hostname.
First, get your (possibly qualified) hostname. Either try the standard Sys::Hostname module:
use Sys::Hostname; $hostname = hostname();
use POSIX qw(uname); ($kernel, $hostname, $release, $version, $hardware) = uname(); $hostname = (uname); # or just one
Then turn it into an IP address and convert to its canonical name:
use Socket; # for AF_INET $address = gethostbyname($hostname) or die "Couldn't resolve $hostname : $!"; $hostname = gethostbyaddr($address, AF_INET) or die "Couldn't re-resolve $hostname : $!";
Sys::Hostname tries to be portable by using knowledge about your system to decide how best to find the hostname. It tries many different ways of getting the hostname, but several involve running other programs. This can lead to tainted data (see Section 19.1).
POSIX::uname, on the other hand, only works on
POSIX systems and isn’t guaranteed to provide anything useful
nodename field that we are examining. That
said, the value is useful on many machines and
doesn’t suffer from the tainted data problem that Sys::Hostname
Once you have the name, though, you must consider that it might be
missing a domain name. For instance, Sys::Hostname may return you
guanaco instead of
guanaco.camelids.org. To fix this, convert the
name back into an IP address with
and then back into a name again with
gethostbyaddr. By involving the ...