---
title: "sock_get_opt_flag()"
description: "Retrieves the status of a particular socket setting."
url: "https://wasix.org/docs/api-reference/wasix/sock_get_opt_flag/"
markdown: "https://wasix.org/docs/api-reference/wasix/sock_get_opt_flag.md"
---

# `sock_get_opt_flag()`

Retrieves the status of a particular socket setting.

## Description

The `sock_get_opt_flag()` function retrieves the status of a specific socket option for the given socket descriptor. It is similar to the `getsockopt` function in POSIX for the `SO_REUSEADDR` option.

## Syntax

```ebnf
  ;;; Note: This is similar to `getsockopt` in POSIX for SO_REUSEADDR
  ;;; Retrieve status of particular socket seting
  (@interface func (export "sock_get_opt_flag")
    ;;; Socket descriptor
    (param $fd $fd)
    ;;; Socket option to be retrieved
    (param $sockopt $sock_option)
    (result $error (expected $bool (error $errno)))
  )
```

## Parameters

- `ctx`: A mutable reference to the function environment.
- `sock`: The socket descriptor.
- `opt`: The socket option to be retrieved.
- `ret_flag`: A WebAssembly pointer to store the retrieved flag value.

## Return Value

The function returns an `Errno` value indicating the outcome of the operation. If the operation is successful, `Errno::Success` is returned. If an error occurs, an appropriate `Errno` value is returned.

## Notes

- The `sock_get_opt_flag()` function retrieves the status of a particular socket setting for the specified socket descriptor.
- The specific socket setting to retrieve is determined by the `opt` parameter.
- The retrieved flag value is stored in the memory location pointed to by the `ret_flag` parameter, which should be a valid WebAssembly pointer to a `Bool` value.
- The function is similar to the `getsockopt` function in POSIX, specifically for retrieving the value of the `SO_REUSEADDR` option.
- The retrieved flag value indicates the status of the socket setting. It will be either `Bool::True` or `Bool::False`.
- The behavior and limitations of the `sock_get_opt_flag()` function may vary depending on the specific runtime environment and underlying networking implementation. It is important to consult the documentation or specifications of the specific environment to understand its behavior in that context.

---

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