acl_get_file

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

n sys/types.h n sys/acl.h

The function retrieves the access ACL associated with a file or directory, or the default ACL associated with a directory. The pathname for the file or directory is pointed to by the argument The ACL is placed into working storage and returns a pointer to that storage.

In order to read an ACL from an object, a process must have read access to the object's attributes.

The value of the argument is used to indicate whether the access ACL or the default ACL associated with is returned. If is ACL_TYPE_ACCESS, the access ACL of is returned. If is ACL_TYPE_DEFAULT, the default ACL of is returned. If is ACL_TYPE_DEFAULT and no default ACL is associated with the directory then an ACL containing zero ACL entries is returned. If specifies a type of ACL that cannot be associated with then the function fails.

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) with the returned by as an argument.

On success, this function returns a pointer to the working storage. On error, a value of is returned, and is set appropriately.

If any of the following conditions occur, the function returns a value of and sets to the corresponding value:

• EACCES Search permission is denied for a component of the path prefix or the object exists and the process does not have appropriate access rights.

Argument specifies a type of ACL that cannot be associated with

EINVAL The argument is not ACL_TYPE_ACCESS or ACL_TYPE_DEFAULT.

ENAMETOOLONG The length of the argument is too long.

ENOENT The named object does not exist or the argument points to an empty string.

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

ENOTDIR A component of the path prefix is not a directory.

ENOTSUP The file system on which the file identified by is located does not support ACLs, or ACLs are disabled.

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

acl_free(3) acl_get_entry(3) acl_get_fd(3) acl_set_file(3) acl(5)

Derived from the FreeBSD manual pages written by and adapted for Linux by