---
name: "io_uring_register_personality"
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_register_personality"
---

# io\_uring\_register\_personality(3)

register credentials with io\_uring

## NAME

io\_uring\_register\_personality - register credentials with io\_uring

## SYNOPSIS

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

**int io\_uring\_register\_personality(struct io\_uring \****ring***);**

## DESCRIPTION

The [**io\_uring\_register\_personality**(3)](/io_uring_register_personality/3.md) function registers the credentials of the calling application with the io\_uring instance specified by *ring*. This allows a ring to be shared between separate users or processes while maintaining credential separation.

The returned personality ID can be used in the *personality* field of a submission queue entry to execute that request with the registered credentials.

## RETURN VALUE

Returns a positive personality ID on success that can be used in future operations. On error, a negative errno value is returned.

## SEE ALSO

[**io\_uring\_unregister\_personality**(3)](/io_uring_unregister_personality/3.md), [**io\_uring\_register**(2)](/io_uring_register/2.md)