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Net::servent(3pm)		 Perl Programmers Reference Guide		Net::servent(3pm)

       Net::servent - by-name interface to Perl's built-in getserv*() functions

	use Net::servent;
	$s = getservbyname(shift || 'ftp') || die "no service";
	printf "port for %s is %s, aliases are %s\n",
	   $s->name, $s->port, "@{$s->aliases}";

	use Net::servent qw(:FIELDS);
	getservbyname(shift || 'ftp') || die "no service";
	print "port for $s_name is $s_port, aliases are @s_aliases\n";

       This module's default exports override the core getservent(), getservbyname(), and getnet-
       byport() functions, replacing them with versions that return "Net::servent" objects.  They
       take default second arguments of "tcp".	This object has methods that return the similarly
       named structure field name from the C's servent structure from netdb.h; namely name,
       aliases, port, and proto.  The aliases method returns an array reference, the rest

       You may also import all the structure fields directly into your namespace as regular vari-
       ables using the :FIELDS import tag.  (Note that this still overrides your core functions.)
       Access these fields as variables named with a preceding "n_".  Thus, "$serv_obj->name()"
       corresponds to $s_name if you import the fields.  Array references are available as regu-
       lar array variables, so for example "@{ $serv_obj->aliases() }" would be simply

       The getserv() function is a simple front-end that forwards a numeric argument to get-
       servbyport(), and the rest to getservbyname().

       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.

	use Net::servent qw(:FIELDS);

	while (@ARGV) {
	    my ($service, $proto) = ((split m!/!, shift), 'tcp');
	    my $valet = getserv($service, $proto);
	    unless ($valet) {
		warn "$0: No service: $service/$proto\n"
	    printf "service $service/$proto is port %d\n", $valet->port;
	    print "alias are @s_aliases\n" if @s_aliases;

       While this class is currently implemented using the Class::Struct module to build a
       struct-like class, you shouldn't rely upon this.

       Tom Christiansen

perl v5.8.0				    2002-06-01				Net::servent(3pm)
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