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

# acl\_strip\_np(3)

strip extended entries from an ACL

## NAME

**acl\_strip\_np** – strip extended entries from an ACL

## LIBRARY

Standard C Library (libc, -lc)

## SYNOPSIS

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

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

*acl\_t*\

**acl\_strip\_np**(*const acl\_t acl*, *int recalculate\_mask*);

## DESCRIPTION

The **acl\_strip\_np**() function returns a pointer to a trivial ACL computed from the ACL pointed to by the argument *acl*.

This function may cause memory to be allocated. The caller should free any releasable memory, when the new ACL is no longer required, by calling [acl\_free(3)](/acl_free/3.md) with the *(void\*)acl\_t* as an argument.

Any existing ACL pointers that refer to the ACL referred to by *acl* shall continue to refer to the ACL.

## RETURN VALUES

Upon successful completion, this function shall return a pointer to the newly allocated ACL. Otherwise, a value of *(acl\_t)NULL* shall be returned, and *errno* shall be set to indicate the error.

## ERRORS

If any of the following conditions occur, the **acl\_init**() function shall return a value of *(acl\_t)NULL* and set *errno* to the corresponding value:

- \[EINVAL\]

  Argument *acl* does not point to a valid ACL.

- \[ENOMEM\]

  The *acl\_t* to be returned requires more memory than is allowed by the hardware or system-imposed memory management constraints.

## SEE ALSO

[acl(3)](/acl/3.md), [acl\_is\_trivial\_np(3)](/acl_is_trivial_np/3.md), [posix1e(3)](/posix1e/3.md)

## STANDARDS

POSIX.1e is described in IEEE POSIX.1e draft 17. Discussion of the draft continues on the cross-platform POSIX.1e implementation mailing list. To join this list, see the FreeBSD POSIX.1e implementation page for more information.

## HISTORY

POSIX.1e support was introduced in FreeBSD 4.0. The **acl\_strip\_np**() function was added in FreeBSD 8.0.

## AUTHORS

Edward Tomasz Napierala ⟨*trasz@FreeBSD.org*⟩