---
name: "acl_set_permset"
section: "3"
platform: "linux"
package: "acl"
version: "2.4.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "freebsd", "macos"]
url: "https://new.carta.tech/acl_set_permset"
---

# acl\_set\_permset(3)

set the permission set in an ACL entry

## NAME

**acl\_set\_permset** – set the permission set in an ACL entry

## LIBRARY

Linux Access Control Lists library (libacl, -lacl).

## SYNOPSIS

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

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

*int*\

**acl\_set\_permset**(*acl\_entry\_t entry\_d*, *acl\_permset\_t permset\_d*);

## DESCRIPTION

The **acl\_set\_permset**() function sets the permission set of the ACL entry indicated by the argument *entry\_d* to the permissions contained in the argument *permset\_d*.

Any ACL entry descriptors that refer to the entry containing the permission set referred to by *permset\_d* shall continue to refer to those entries. Any ACL entry descriptors that refer to the entry referred to by *entry\_d* shall continue to refer to that entry.

## RETURN VALUE

The **acl\_set\_permset()** function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

## ERRORS

If any of the following conditions occur, the **acl\_set\_permset**() function returns -1 and sets *errno* to the corresponding value:

- \[EINVAL\]

  The argument *entry\_d* is not a valid descriptor for an ACL entry.

  The argument *permset\_d* is not a valid descriptor for a permission set within an ACL entry.

  The argument *permset\_d* contains values which are not valid *acl\_permset\_t* values.

## STANDARDS

IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)

## SEE ALSO

[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\_perm(3)](/acl_get_perm/3.md), [acl\_get\_permset(3)](/acl_get_permset/3.md), [acl\_get\_qualifier(3)](/acl_get_qualifier/3.md), [acl\_get\_tag\_type(3)](/acl_get_tag_type/3.md), [acl\_set\_qualifier(3)](/acl_set_qualifier/3.md), [acl\_set\_tag\_type(3)](/acl_set_tag_type/3.md), [acl(5)](/acl/5.md)

## AUTHOR

Derived from the FreeBSD manual pages written by Robert N M Watson ⟨rwatson@FreeBSD.org⟩, and adapted for Linux by Andreas Gruenbacher ⟨andreas.gruenbacher@gmail.com⟩.