---
name: "socket_getnameinfo"
section: "1p"
platform: "linux"
package: "libsocket-getaddrinfo-perl"
version: "0.22-6"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/socket_getnameinfo"
---

# socket\_getnameinfo(1p)

command-line tool to "getnameinfo(3)" resolver

## NAME

"socket\_getnameinfo" - command-line tool to "[getnameinfo(3)](/getnameinfo/3.md)" resolver

## SYNOPSIS

**socket\_getnameinfo** \[*options...*\] *address* *port*

## DESCRIPTION

This tool provides a convenient command-line wrapper around the `getnameinfo(3)` resolver function. It will perform a single reverse lookup to convert an address and port number into its host and service names. This is mainly useful when debugging names resolution problems, because it allows inspection of the `getnameinfo(3)` behaviour itself, outside of any real program that is trying to use it.

## OPTIONS

- \--address, -A ADDR

  Numerical form of address to look up. If not supplied, will use the first positional argument.

- \--port, -P PORT

  Port number to look up. If not supplied, will use the second positional argument.

- \--dgram

  Sets the `"NI_DGRAM"` flag; looks up a `"SOCK_DGRAM"` (udp) port allocation rather than `"SOCK_STREAM"` (tcp).

- \--help

  Display a help summary and exit

## NOTE

Upstream this script is known as `"getnameinfo"`, but was renamed on Debian.

## AUTHOR

Paul Evans \<leonerd@leonerd.org.uk\>