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.\" ========================================================================
.IX Title "Net::hostent 3"
.TH Net::hostent 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide"
Net::hostent \- by\-name interface to Perl's built\-in gethost*() functions
This module's default exports override the core \fIgethostbyname()\fR and
\&\fIgethostbyaddr()\fR functions, replacing them with versions that return
\&\*(L"Net::hostent\*(R" objects. This object has methods that return the similarly
named structure field name from the C's hostent structure from \fInetdb.h\fR;
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
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 \f(CW\*(C`h_\*(C'\fR. Thus, \f(CW\*(C`$host_obj\->name()\*(C'\fR corresponds to
\&\f(CW$h_name\fR if you import the fields. Array references are available as
regular array variables, so for example \f(CW\*(C`@{ $host_obj\->aliases()
}\*(C'\fR would be simply \f(CW@h_aliases\fR.
The \fIgethost()\fR function is a simple front-end that forwards a numeric
argument to \fIgethostbyaddr()\fR by way of Socket::inet_aton, and the rest
to \fIgethostbyname()\fR.
To access this functionality without the core overrides,
pass the \f(CW\*(C`use\*(C'\fR an empty import list, and then access
function functions with their full qualified names.
On the other hand, the built-ins are still available
via the \f(CW\*(C`CORE::\*(C'\fR pseudo\-package.
\& @ARGV = ('netscape.com') unless @ARGV;
\& unless ($h = gethost($host)) {
\& warn "$0: no such host: $host\en";
\& printf "\en%s is %s%s\en",
\& lc($h->name) eq lc($host) ? "" : "*really* ",
\& print "\etaliases are ", join(", ", @{$h->aliases}), "\en"
\& if ( @{$h->addr_list} > 1 ) {
\& for $addr ( @{$h->addr_list} ) {
\& printf "\etaddr #%d is [%s]\en", $i++, inet_ntoa($addr);
\& printf "\etaddress is [%s]\en", inet_ntoa($h->addr);
\& if ($h = gethostbyaddr($h->addr)) {
\& if (lc($h->name) ne lc($host)) {
\& printf "\etThat addr reverses to host %s!\en", $h->name;
While this class is currently implemented using the Class::Struct
module to build a struct-like class, you shouldn't rely upon this.
projects / OpenSPARC-T2-SAM / blob