---
name: "dpns_getusrbyuid"
section: "3"
platform: "linux"
package: "libdpm-dev"
version: "1.10.0-2+b3"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/dpns_getusrbyuid"
---

# dpns\_getusrbyuid(3)

get user name associated with a given virtual uid

## NAME

dpns\_getusrbyuid - get user name associated with a given virtual uid

## SYNOPSIS

**#include \<sys/types.h\>**\
 **#include "dpns\_api.h"**

**int dpns\_getusrbyuid (uid\_t** *uid***,** **char \****username***)**

## DESCRIPTION

**dpns\_getusrbyuid** gets the user name associated with a given virtual uid.

- *uid*

  specifies the Virtual User Id.

- *username*

  points at a buffer to receive the associated user name. The buffer must be at least 256 characters long.

## RETURN VALUE

This routine returns 0 if the operation was successful or -1 if the operation failed. In the latter case, **serrno** is set appropriately.

## ERRORS

- **EFAULT**

  *username* is a NULL pointer.

- **EINVAL**

  This uid does not exist in the internal mapping table.

- **SENOSHOST**

  Host unknown.

- **SENOSSERV**

  Service unknown.

- **SECOMERR**

  Communication error.

- **ENSNACT**

  Name server is not running or is being shutdown.