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Diffstat (limited to 'contrib/perl5/lib/Net/protoent.pm')
-rw-r--r-- | contrib/perl5/lib/Net/protoent.pm | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/contrib/perl5/lib/Net/protoent.pm b/contrib/perl5/lib/Net/protoent.pm new file mode 100644 index 000000000000..737ff5a33bcd --- /dev/null +++ b/contrib/perl5/lib/Net/protoent.pm @@ -0,0 +1,94 @@ +package Net::protoent; +use strict; + +BEGIN { + use Exporter (); + use vars qw(@EXPORT @EXPORT_OK %EXPORT_TAGS); + @EXPORT = qw(getprotobyname getprotobynumber getprotoent); + @EXPORT_OK = qw( $p_name @p_aliases $p_proto ); + %EXPORT_TAGS = ( FIELDS => [ @EXPORT_OK, @EXPORT ] ); +} +use vars @EXPORT_OK; + +# Class::Struct forbids use of @ISA +sub import { goto &Exporter::import } + +use Class::Struct qw(struct); +struct 'Net::protoent' => [ + name => '$', + aliases => '@', + proto => '$', +]; + +sub populate (@) { + return unless @_; + my $pob = new(); + $p_name = $pob->[0] = $_[0]; + @p_aliases = @{ $pob->[1] } = split ' ', $_[1]; + $p_proto = $pob->[2] = $_[2]; + return $pob; +} + +sub getprotoent ( ) { populate(CORE::getprotoent()) } +sub getprotobyname ($) { populate(CORE::getprotobyname(shift)) } +sub getprotobynumber ($) { populate(CORE::getprotobynumber(shift)) } + +sub getproto ($;$) { + no strict 'refs'; + return &{'getprotoby' . ($_[0]=~/^\d+$/ ? 'number' : 'name')}(@_); +} + +1; + +__END__ + +=head1 NAME + +Net::protoent - by-name interface to Perl's built-in getproto*() functions + +=head1 SYNOPSIS + + use Net::protoent; + $p = getprotobyname(shift || 'tcp') || die "no proto"; + printf "proto for %s is %d, aliases are %s\n", + $p->name, $p->proto, "@{$p->aliases}"; + + use Net::protoent qw(:FIELDS); + getprotobyname(shift || 'tcp') || die "no proto"; + print "proto for $p_name is $p_proto, aliases are @p_aliases\n"; + +=head1 DESCRIPTION + +This module's default exports override the core getprotoent(), +getprotobyname(), and getnetbyport() functions, replacing them with +versions that return "Net::protoent" objects. They take default +second arguments of "tcp". This object has methods that return the +similarly named structure field name from the C's protoent structure +from F<netdb.h>; namely name, aliases, and proto. The aliases method +returns an array reference, the rest scalars. + +You may also import all the structure fields directly into your namespace +as regular variables using the :FIELDS import tag. (Note that this still +overrides your core functions.) Access these fields as variables named +with a preceding C<p_>. Thus, C<$proto_obj-E<gt>name()> corresponds to +$p_name if you import the fields. Array references are available as +regular array variables, so for example C<@{ $proto_obj-E<gt>aliases() +}> would be simply @p_aliases. + +The getproto() function is a simple front-end that forwards a numeric +argument to getprotobyport(), and the rest to getprotobyname(). + +To access this functionality without the core overrides, +pass the C<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 C<CORE::> pseudo-package. + +=head1 NOTE + +While this class is currently implemented using the Class::Struct +module to build a struct-like class, you shouldn't rely upon this. + +=head1 AUTHOR + +Tom Christiansen |