---
name: "io_uring_prep_uring_cmd"
section: "3"
platform: "linux"
package: "liburing"
version: "2.15-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/io_uring_prep_uring_cmd"
---

# io\_uring\_prep\_uring\_cmd(3)

prepare a uring\_cmd request

## NAME

io\_uring\_prep\_uring\_cmd - prepare a uring\_cmd request

## SYNOPSIS

```
#include <liburing.h>
```

**void io\_uring\_prep\_uring\_cmd(struct io\_uring\_sqe \****sqe***,**                                            **int** *cmd\_op***,**                                            **int** *fd***);**

## DESCRIPTION

The [**io\_uring\_prep\_uring\_cmd**(3)](/io_uring_prep_uring_cmd/3.md) function prepares uring\_cmd (fd specific) request. The submission queue entry *sqe* is setup to use the filedescriptor *fd* to send file descriptor specific *cmd\_op*.

The reserved fields are initialized to 0. Otherwise the caller has to set up any submission queue entry's operation specific fields.

## RETURN VALUE

None

## ERRORS

None

## SEE ALSO

[**io\_uring\_prep\_uring\_cmd128**(3)](/io_uring_prep_uring_cmd128/3.md), [**io\_uring\_get\_sqe**(3)](/io_uring_get_sqe/3.md), [**io\_uring\_submit**(3)](/io_uring_submit/3.md),