---
name: "explain_getpeername_or_die"
section: "3"
platform: "linux"
package: "libexplain-dev"
version: "1.4.D001-16"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/explain_getpeername_or_die"
---

# explain\_getpeername\_or\_die(3)

get name of peer socket and report errors

## NAME

explain\_getpeername\_or\_die - get name of peer socket and report errors

## SYNOPSIS

\#include \<libexplain/getpeername.h\>

void explain\_getpeername\_or\_die(int fildes, struct sockaddr \*sock\_addr, socklen\_t \*sock\_addr\_size);

## DESCRIPTION

The **explain\_getpeername\_or\_die** function is used to call the [*getpeername*(2)](/getpeername/2.md) system call.  On failure an explanation will be printed to *stderr*, obtained from [*explain\_getpeername*(3)](/explain_getpeername/3.md), and then the process terminates by calling `exit(EXIT_FAILURE)`.

This function is intended to be used in a fashion similar to the following example:

```
struct sockadd sock_addr;
socklen_t sock_addr_size = sizeof(sock_addr);
explain_getpeername_or_die(fildes, &sock_addr, &sock_addr_size);
```

- *fildes*

  The fildes, exactly as to be passed to the [*getpeername*(2)](/getpeername/2.md) system call.

- *sock\_addr*

  The sock\_addr, exactly as to be passed to the [*getpeername*(2)](/getpeername/2.md) system call.

- *sock\_addr\_size*

  The sock\_addr\_size, exactly as to be passed to the [*getpeername*(2)](/getpeername/2.md) system call.

- Returns:

  This function only returns on success, see [*getpeername*(2)](/getpeername/2.md) for more information. On failure, prints an explanation and exits.

## SEE ALSO

- [*getpeername*(2)](/getpeername/2.md)

  get name of connected peer socket

- [*explain\_getpeername*(3)](/explain_getpeername/3.md)

  explain [*getpeername*(2)](/getpeername/2.md) errors

- [*exit*(2)](/exit/2.md)

  terminate the calling process

## COPYRIGHT

libexplain version 1.4\
 Copyright (C) 2009 Peter Miller