1*0Sstevel@tonic-gatepackage Net::servent; 2*0Sstevel@tonic-gateuse strict; 3*0Sstevel@tonic-gate 4*0Sstevel@tonic-gateuse 5.006_001; 5*0Sstevel@tonic-gateour $VERSION = '1.01'; 6*0Sstevel@tonic-gateour(@EXPORT, @EXPORT_OK, %EXPORT_TAGS); 7*0Sstevel@tonic-gateBEGIN { 8*0Sstevel@tonic-gate use Exporter (); 9*0Sstevel@tonic-gate @EXPORT = qw(getservbyname getservbyport getservent getserv); 10*0Sstevel@tonic-gate @EXPORT_OK = qw( $s_name @s_aliases $s_port $s_proto ); 11*0Sstevel@tonic-gate %EXPORT_TAGS = ( FIELDS => [ @EXPORT_OK, @EXPORT ] ); 12*0Sstevel@tonic-gate} 13*0Sstevel@tonic-gateuse vars @EXPORT_OK; 14*0Sstevel@tonic-gate 15*0Sstevel@tonic-gate# Class::Struct forbids use of @ISA 16*0Sstevel@tonic-gatesub import { goto &Exporter::import } 17*0Sstevel@tonic-gate 18*0Sstevel@tonic-gateuse Class::Struct qw(struct); 19*0Sstevel@tonic-gatestruct 'Net::servent' => [ 20*0Sstevel@tonic-gate name => '$', 21*0Sstevel@tonic-gate aliases => '@', 22*0Sstevel@tonic-gate port => '$', 23*0Sstevel@tonic-gate proto => '$', 24*0Sstevel@tonic-gate]; 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gatesub populate (@) { 27*0Sstevel@tonic-gate return unless @_; 28*0Sstevel@tonic-gate my $sob = new(); 29*0Sstevel@tonic-gate $s_name = $sob->[0] = $_[0]; 30*0Sstevel@tonic-gate @s_aliases = @{ $sob->[1] } = split ' ', $_[1]; 31*0Sstevel@tonic-gate $s_port = $sob->[2] = $_[2]; 32*0Sstevel@tonic-gate $s_proto = $sob->[3] = $_[3]; 33*0Sstevel@tonic-gate return $sob; 34*0Sstevel@tonic-gate} 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gatesub getservent ( ) { populate(CORE::getservent()) } 37*0Sstevel@tonic-gatesub getservbyname ($;$) { populate(CORE::getservbyname(shift,shift||'tcp')) } 38*0Sstevel@tonic-gatesub getservbyport ($;$) { populate(CORE::getservbyport(shift,shift||'tcp')) } 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gatesub getserv ($;$) { 41*0Sstevel@tonic-gate no strict 'refs'; 42*0Sstevel@tonic-gate return &{'getservby' . ($_[0]=~/^\d+$/ ? 'port' : 'name')}(@_); 43*0Sstevel@tonic-gate} 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate1; 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate__END__ 48*0Sstevel@tonic-gate 49*0Sstevel@tonic-gate=head1 NAME 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gateNet::servent - by-name interface to Perl's built-in getserv*() functions 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate=head1 SYNOPSIS 54*0Sstevel@tonic-gate 55*0Sstevel@tonic-gate use Net::servent; 56*0Sstevel@tonic-gate $s = getservbyname(shift || 'ftp') || die "no service"; 57*0Sstevel@tonic-gate printf "port for %s is %s, aliases are %s\n", 58*0Sstevel@tonic-gate $s->name, $s->port, "@{$s->aliases}"; 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate use Net::servent qw(:FIELDS); 61*0Sstevel@tonic-gate getservbyname(shift || 'ftp') || die "no service"; 62*0Sstevel@tonic-gate print "port for $s_name is $s_port, aliases are @s_aliases\n"; 63*0Sstevel@tonic-gate 64*0Sstevel@tonic-gate=head1 DESCRIPTION 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gateThis module's default exports override the core getservent(), 67*0Sstevel@tonic-gategetservbyname(), and 68*0Sstevel@tonic-gategetnetbyport() functions, replacing them with versions that return 69*0Sstevel@tonic-gate"Net::servent" objects. They take default second arguments of "tcp". This object has methods that return the similarly 70*0Sstevel@tonic-gatenamed structure field name from the C's servent structure from F<netdb.h>; 71*0Sstevel@tonic-gatenamely name, aliases, port, and proto. The aliases 72*0Sstevel@tonic-gatemethod returns an array reference, the rest scalars. 73*0Sstevel@tonic-gate 74*0Sstevel@tonic-gateYou may also import all the structure fields directly into your namespace 75*0Sstevel@tonic-gateas regular variables using the :FIELDS import tag. (Note that this still 76*0Sstevel@tonic-gateoverrides your core functions.) Access these fields as variables named 77*0Sstevel@tonic-gatewith a preceding C<s_>. Thus, C<$serv_obj-E<gt>name()> corresponds to 78*0Sstevel@tonic-gate$s_name if you import the fields. Array references are available as 79*0Sstevel@tonic-gateregular array variables, so for example C<@{ $serv_obj-E<gt>aliases()}> 80*0Sstevel@tonic-gatewould be simply @s_aliases. 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gateThe getserv() function is a simple front-end that forwards a numeric 83*0Sstevel@tonic-gateargument to getservbyport(), and the rest to getservbyname(). 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gateTo access this functionality without the core overrides, 86*0Sstevel@tonic-gatepass the C<use> an empty import list, and then access 87*0Sstevel@tonic-gatefunction functions with their full qualified names. 88*0Sstevel@tonic-gateOn the other hand, the built-ins are still available 89*0Sstevel@tonic-gatevia the C<CORE::> pseudo-package. 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate=head1 EXAMPLES 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate use Net::servent qw(:FIELDS); 94*0Sstevel@tonic-gate 95*0Sstevel@tonic-gate while (@ARGV) { 96*0Sstevel@tonic-gate my ($service, $proto) = ((split m!/!, shift), 'tcp'); 97*0Sstevel@tonic-gate my $valet = getserv($service, $proto); 98*0Sstevel@tonic-gate unless ($valet) { 99*0Sstevel@tonic-gate warn "$0: No service: $service/$proto\n" 100*0Sstevel@tonic-gate next; 101*0Sstevel@tonic-gate } 102*0Sstevel@tonic-gate printf "service $service/$proto is port %d\n", $valet->port; 103*0Sstevel@tonic-gate print "alias are @s_aliases\n" if @s_aliases; 104*0Sstevel@tonic-gate } 105*0Sstevel@tonic-gate 106*0Sstevel@tonic-gate=head1 NOTE 107*0Sstevel@tonic-gate 108*0Sstevel@tonic-gateWhile this class is currently implemented using the Class::Struct 109*0Sstevel@tonic-gatemodule to build a struct-like class, you shouldn't rely upon this. 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate=head1 AUTHOR 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gateTom Christiansen 114