---
name: "acl_get_perm_np"
section: "3"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd", "macos"]
url: "https://new.carta.tech/acl_get_perm_np"
---

# acl\_get\_perm\_np(3)

check if a permission is set in a permission set

## NAME

**acl\_get\_perm\_np** – check if a permission is set in a permission set

## LIBRARY

Standard C Library (libc, -lc)

## SYNOPSIS

**#include \<sys/types.h\>**

**#include \<sys/acl.h\>**

*int*\

**acl\_get\_perm\_np**(*acl\_permset\_t permset\_d*, *acl\_perm\_t perm*);

## DESCRIPTION

The **acl\_get\_perm\_np**() function is a non-portable function that checks if a permission is set in a permission set.

## RETURN VALUES

If the permission in *perm* is set in the permission set *permset\_d*, a value of 1 is returned, otherwise a value of 0 is returned.

## ERRORS

If any of the following conditions occur, the **acl\_get\_perm\_np**() function will return a value of -1 and set global variable *errno* to the corresponding value:

- \[EINVAL\]

  Argument *perm* does not contain a valid ACL permission or argument *permset\_d* is not a valid ACL permset.

## SEE ALSO

[acl(3)](/acl/3.md), [acl\_add\_perm(3)](/acl_add_perm/3.md), [acl\_clear\_perms(3)](/acl_clear_perms/3.md), [acl\_delete\_perm(3)](/acl_delete_perm/3.md), [acl\_get\_permset(3)](/acl_get_permset/3.md), [acl\_set\_permset(3)](/acl_set_permset/3.md), [posix1e(3)](/posix1e/3.md)

## STANDARDS

POSIX.1e is described in IEEE POSIX.1e draft 17.

## HISTORY

POSIX.1e support was introduced in FreeBSD 4.0. The **acl\_get\_perm\_np**() function was added in FreeBSD 5.0.

## AUTHORS

The **acl\_get\_perm\_np**() function was written by Chris D. Faulhaber ⟨*jedgar@fxp.org*⟩.