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NAME

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



SYNOPSIS
      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";




DESCRIPTION
     This module's default exports override the core
     getservent(), getservbyname(), and getnetbyport() 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 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 n_.
     Thus, $serv_obj->name() corresponds to $s_name if you import
     the fields.  Array references are available as regular array
     variables, so for example @{ $serv_obj->aliases() } would be
     simply @s_aliases.

     The getserv() function is a simple front-end that forwards a
     numeric argument to getservbyport(), 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.



EXAMPLES
      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"
              next;
          }
          printf "service $service/$proto is port %d\n", $valet->port;
          print "alias are @s_aliases\n" if @s_aliases;
      }




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









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Created 1996-2024 by Maxim Chirkov

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