ACL\_CREATE\_ENTRY(3) Library Functions Manual ACL\_CREATE\_ENTRY(3)

# [NAME](#NAME)

`acl_create_entry` — create a new ACL entry

# [LIBRARY](#LIBRARY)

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

# [SYNOPSIS](#SYNOPSIS)

`#include <sys/types.h>`  
`#include <sys/acl.h>`

`int`  
`acl_create_entry`(`acl_t *acl_p`, `acl_entry_t *entry_p`);

# [DESCRIPTION](#DESCRIPTION)

The [`acl_create_entry`](#acl_create_entry)() function creates a new ACL entry in the ACL pointed to by the contents of the pointer argument `acl_p`. On success, the function returns a descriptor for the new ACL entry via `entry_p`.

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)](/man/os/acl/acl_free.3) with `(void*)*acl_p` as an argument. If the ACL working storage cannot be increased in the current location, then the working storage for the ACL pointed to by `acl_p` may be relocated and the previous working storage is released. A pointer to the new working storage is returned via `acl_p`.

The components of the new ACL entry are initialized in the following ways: the ACL tag type component contains ACL\_UNDEFINED\_TAG, the qualifier component contains ACL\_UNDEFINED\_ID, and the set of permissions has no permissions enabled. Any existing ACL entry descriptors that refer to entries in the ACL continue to refer to those entries.

# [RETURN VALUE](#RETURN_VALUE)

The `acl_create_entry`() 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](#ERRORS)

If any of the following conditions occur, the `acl_create_entry`() function returns `-1` and sets `errno` to the corresponding value:

\[[`EINVAL`](#EINVAL)]

The argument `acl_p` is not a valid pointer to an ACL.

\[[`ENOMEM`](#ENOMEM)]

The ACL working storage requires more memory than is allowed by the hardware or system-imposed memory management constraints.

# [STANDARDS](#STANDARDS)

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

# [SEE ALSO](#SEE_ALSO)

[acl\_init(3)](/man/os/acl/acl_init.3), [acl\_delete\_entry(3)](/man/os/acl/acl_delete_entry.3), [acl\_free(3)](/man/os/acl/acl_free.3), [acl\_create\_entry(3)](/man/os/acl/acl_create_entry.3), [acl(5)](/man/os/acl/acl.5)

# [AUTHOR](#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⟩.

March 23, 2002 Linux ACL

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Document: acl_create_entry(3) from acl 2.4.0-r3 (Chainguard OS)
Source: https://git.savannah.nongnu.org/git/acl.git