---
name: "explain_accept4_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_accept4_or_die"
---

# explain\_accept4\_or\_die(3)

accept a connection on a socket and report errors

## NAME

explain\_accept4\_or\_die - accept a connection on a socket and report errors

## SYNOPSIS

\#include \<libexplain/accept4.h\>

int explain\_accept4\_or\_die(int fildes, struct sockaddr \*sock\_addr, socklen\_t \*sock\_addr\_size, int flags);\
 int explain\_accept4\_on\_error(int fildes, struct sockaddr \*sock\_addr, socklen\_t \*sock\_addr\_size, int flags);

## DESCRIPTION

The **explain\_accept4\_or\_die** function is used to call the [*accept4*(2)](/accept4/2.md) system call. On failure an explanation will be printed to *stderr*, obtained from the [*explain\_accept4*(3)](/explain_accept4/3.md) function, and then the process terminates by calling `exit(EXIT_FAILURE)`.

The **explain\_accept4\_on\_error** function is used to call the [*accept4*(2)](/accept4/2.md) system call. On failure an explanation will be printed to *stderr*, obtained from the [*explain\_accept4*(3)](/explain_accept4/3.md) function, but still returns to the caller.

- *fildes*

  The fildes, exactly as to be passed to the [*accept4*(2)](/accept4/2.md) system call.

- *sock\_addr*

  The sock\_addr, exactly as to be passed to the [*accept4*(2)](/accept4/2.md) system call.

- *sock\_addr\_size*

  The sock\_addr\_size, exactly as to be passed to the [*accept4*(2)](/accept4/2.md) system call.

- *flags*

  The flags, exactly as to be passed to the [*accept4*(2)](/accept4/2.md) system call.

## RETURN VALUE

The **explain\_accept4\_or\_die** function only returns on success, see [*accept4*(2)](/accept4/2.md) for more information. On failure, prints an explanation and exits, it does not return.

The **explain\_accept4\_on\_error** function always returns the value return by the wrapped [*accept4*(2)](/accept4/2.md) system call.

## EXAMPLE

The **explain\_accept4\_or\_die** function is intended to be used in a fashion similar to the following example:

```
int result = explain_accept4_or_die(fildes, sock_addr, sock_addr_size, flags);
```

## SEE ALSO

- [*accept4*(2)](/accept4/2.md)

  accept a connection on a socket

- [*explain\_accept4*(3)](/explain_accept4/3.md)

  explain [*accept4*(2)](/accept4/2.md) errors

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

  terminate the calling process

## COPYRIGHT

libexplain version 1.4\
 Copyright (C) 2009 Peter Miller