ACL_GET_FILE(3) BSD Library Functions Manual ACL_GET_FILE(3)
acl_get_file -- get an ACL by filename
Linux Access Control Lists library (libacl, -lacl).
acl_get_file(const char *path_p, acl_type_t type);
The acl_get_file() 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 path_p. The ACL is placed into working storage and
acl_get_file() 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
The value of the argument type is used to indicate whether the access ACL or the default ACL
associated with path_p is returned. If type is ACL_TYPE_ACCESS, the access ACL of path_p is
returned. If type is ACL_TYPE_DEFAULT, the default ACL of path_p is returned. If type is
ACL_TYPE_DEFAULT and no default ACL is associated with the directory path_p, then an ACL
containing zero ACL entries is returned. If type specifies a type of ACL that cannot be
associated with path_p, then the function fails.
This function may cause memory to be allocated. The caller should free any releasable mem-
ory, when the new ACL is no longer required, by calling acl_free(3) with the (void*)acl_t
returned by acl_get_file() as an argument.
Upon successful completion, this function returns a pointer to the working storage. Other-
wise, a value of (acl_t)NULL is returned, and errno is set to indicate the error.
If any of the following conditions occur, the acl_get_file() function returns a value of
(acl_t)NULL and sets errno 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 type specifies a type of ACL that cannot be associated with
[EINVAL] The argument type is not ACL_TYPE_ACCESS or ACL_TYPE_DEFAULT.
[ENAMETOOLONG] The length of the argument path_p is too long.
[ENOENT] The named object does not exist or the argument path_p points to an empty
[ENOMEM] The ACL working storage requires more memory than is allowed by the hard-
ware 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 path_p 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 Robert N M Watson <rwatson@FreeBSD.org>,
and adapted for Linux by Andreas Gruenbacher <email@example.com>.
Linux ACL March 23, 2002 Linux ACL