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- NNNNeeeetttt::::::::sssseeeerrrrvvvveeeennnntttt((((3333)))) 22223333////JJJJuuuullll////99998888 ((((ppppeeeerrrrllll 5555....000000005555,,,, ppppaaaattttcccchhhh 00002222)))) NNNNeeeetttt::::::::sssseeeerrrrvvvveeeennnntttt((((3333))))
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- NNNNAAAAMMMMEEEE
- Net::servent - by-name interface to Perl's built-in
- getserv*() functions
-
- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- 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";
-
-
- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- This module's default exports override the core
- _g_e_t_s_e_r_v_e_n_t(), _g_e_t_s_e_r_v_b_y_n_a_m_e(), and _g_e_t_n_e_t_b_y_p_o_r_t() 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 _n_e_t_d_b._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 @{ $serv_obj->aliases() } would be
- simply @s_aliases.
-
- The _g_e_t_s_e_r_v() function is a simple front-end that forwards a
- numeric argument to _g_e_t_s_e_r_v_b_y_p_o_r_t(), and the rest to
- _g_e_t_s_e_r_v_b_y_n_a_m_e().
-
- To access this functionality without the core overrides,
- pass the use an empty import list, and then access function
- functions with their full qualified names. On the other
- hand, the built-ins are still available via the CORE::
- pseudo-package.
-
- EEEEXXXXAAAAMMMMPPPPLLLLEEEESSSS
- use Net::servent qw(:FIELDS);
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- Page 1 (printed 10/23/98)
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- NNNNeeeetttt::::::::sssseeeerrrrvvvveeeennnntttt((((3333)))) 22223333////JJJJuuuullll////99998888 ((((ppppeeeerrrrllll 5555....000000005555,,,, ppppaaaattttcccchhhh 00002222)))) NNNNeeeetttt::::::::sssseeeerrrrvvvveeeennnntttt((((3333))))
-
-
-
- while (@ARGV) {
- my ($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;
- }
-
-
- NNNNOOOOTTTTEEEE
- While this class is currently implemented using the
- Class::Struct module to build a struct-like class, you
- shouldn't rely upon this.
-
- AAAAUUUUTTTTHHHHOOOORRRR
- Tom Christiansen
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- Page 2 (printed 10/23/98)
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