10-31-2011
Quote:
Originally Posted by
rcmjivaro
On the host o/s, type:
ip addr
to get your device name.
and this works on which host os? and in what way does it help with the problem?
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LEARN ABOUT SUSE
net::hostent
Net::hostent(3pm) Perl Programmers Reference Guide Net::hostent(3pm)
NAME
Net::hostent - by-name interface to Perl's built-in gethost*() functions
SYNOPSIS
use Net::hostent;
DESCRIPTION
This module's default exports override the core gethostbyname() and gethostbyaddr() functions, replacing them with versions that return
"Net::hostent" objects. This object has methods that return the similarly named structure field name from the C's hostent structure from
netdb.h; namely name, aliases, addrtype, length, and addr_list. The aliases and addr_list methods return array reference, the rest
scalars. The addr method is equivalent to the zeroth element in the addr_list array reference.
You may also import all the structure fields directly into your namespace as regular variables using the :FIELDS import tag. (Note that
this still overrides your core functions.) Access these fields as variables named with a preceding "h_". Thus, "$host_obj->name()"
corresponds to $h_name if you import the fields. Array references are available as regular array variables, so for example "@{
$host_obj->aliases() }" would be simply @h_aliases.
The gethost() function is a simple front-end that forwards a numeric argument to gethostbyaddr() by way of Socket::inet_aton, and the rest
to gethostbyname().
To access this functionality without the core overrides, pass the "use" an empty import list, and then access function functions with their
full qualified names. On the other hand, the built-ins are still available via the "CORE::" pseudo-package.
EXAMPLES
use Net::hostent;
use Socket;
@ARGV = ('netscape.com') unless @ARGV;
for $host ( @ARGV ) {
unless ($h = gethost($host)) {
warn "$0: no such host: $host
";
next;
}
printf "
%s is %s%s
",
$host,
lc($h->name) eq lc($host) ? "" : "*really* ",
$h->name;
print " aliases are ", join(", ", @{$h->aliases}), "
"
if @{$h->aliases};
if ( @{$h->addr_list} > 1 ) {
my $i;
for $addr ( @{$h->addr_list} ) {
printf " addr #%d is [%s]
", $i++, inet_ntoa($addr);
}
} else {
printf " address is [%s]
", inet_ntoa($h->addr);
}
if ($h = gethostbyaddr($h->addr)) {
if (lc($h->name) ne lc($host)) {
printf " That addr reverses to host %s!
", $h->name;
$host = $h->name;
redo;
}
}
}
NOTE
While this class is currently implemented using the Class::Struct module to build a struct-like class, you shouldn't rely upon this.
AUTHOR
Tom Christiansen
perl v5.12.1 2010-04-26 Net::hostent(3pm)