{
    "mode": "perldoc",
    "parameter": "Net::servent",
    "section": "",
    "url": "https://www.chedong.com/phpMan.php/perldoc/Net%3A%3Aservent/json",
    "generated": "2026-06-11T14:26:50Z",
    "synopsis": "use Net::servent;\n$s = getservbyname(shift || 'ftp') || die \"no service\";\nprintf \"port for %s is %s, aliases are %s\\n\",\n$s->name, $s->port, \"@{$s->aliases}\";\nuse Net::servent qw(:FIELDS);\ngetservbyname(shift || 'ftp') || die \"no service\";\nprint \"port for $sname is $sport, aliases are @saliases\\n\";",
    "sections": {
        "NAME": {
            "content": "Net::servent - by-name interface to Perl's built-in getserv*() functions\n",
            "subsections": []
        },
        "SYNOPSIS": {
            "content": "use Net::servent;\n$s = getservbyname(shift || 'ftp') || die \"no service\";\nprintf \"port for %s is %s, aliases are %s\\n\",\n$s->name, $s->port, \"@{$s->aliases}\";\n\nuse Net::servent qw(:FIELDS);\ngetservbyname(shift || 'ftp') || die \"no service\";\nprint \"port for $sname is $sport, aliases are @saliases\\n\";\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "This module's default exports override the core getservent(), getservbyname(), and",
            "subsections": [
                {
                    "name": "getnetbyport",
                    "content": "take default second arguments of \"tcp\". This object has methods that return the similarly named\nstructure field name from the C's servent structure from netdb.h; namely name, aliases, port,\nand proto. The aliases method returns an array reference, the rest scalars.\n\nYou may also import all the structure fields directly into your namespace as regular variables\nusing the :FIELDS import tag. (Note that this still overrides your core functions.) Access these\nfields as variables named with a preceding \"s\". Thus, \"$servobj->name()\" corresponds to\n$sname if you import the fields. Array references are available as regular array variables, so\nfor example \"@{ $servobj->aliases()}\" would be simply @saliases.\n\nThe getserv() function is a simple front-end that forwards a numeric argument to"
                },
                {
                    "name": "getservbyport",
                    "content": "To access this functionality without the core overrides, pass the \"use\" an empty import list,\nand then access function functions with their full qualified names. On the other hand, the\nbuilt-ins are still available via the \"CORE::\" pseudo-package.\n"
                }
            ]
        },
        "EXAMPLES": {
            "content": "use Net::servent qw(:FIELDS);\n\nwhile (@ARGV) {\nmy ($service, $proto) = ((split m!/!, shift), 'tcp');\nmy $valet = getserv($service, $proto);\nunless ($valet) {\nwarn \"$0: No service: $service/$proto\\n\"\nnext;\n}\nprintf \"service $service/$proto is port %d\\n\", $valet->port;\nprint \"alias are @saliases\\n\" if @saliases;\n}\n",
            "subsections": []
        },
        "NOTE": {
            "content": "While this class is currently implemented using the Class::Struct module to build a struct-like\nclass, you shouldn't rely upon this.\n",
            "subsections": []
        },
        "AUTHOR": {
            "content": "Tom Christiansen\n",
            "subsections": []
        }
    },
    "summary": "Net::servent - by-name interface to Perl's built-in getserv*() functions",
    "flags": [],
    "examples": [
        "use Net::servent qw(:FIELDS);",
        "while (@ARGV) {",
        "my ($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 @saliases\\n\" if @saliases;"
    ],
    "see_also": []
}