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 attributes.
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 memory, 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.
If any of the following conditions occur, the acl_get_file()
function returns a value of (acl_t)NULL and sets errno to the
[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 path_p.
[EINVAL] The argument type is not ACL_TYPE_ACCESS or
[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 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
[ENOTSUP] The file system on which the file identified by
path_p is located does not support ACLs, or ACLs
This page is part of the acl (manipulating access control lists)
project. Information about the project can be found at
http://savannah.nongnu.org/projects/acl. If you have a bug report
for this manual page, see
⟨http://savannah.nongnu.org/bugs/?group=acl⟩. This page was
obtained from the project's upstream Git repository
⟨git://git.savannah.nongnu.org/acl.git⟩ on 2021-04-01. (At that
time, the date of the most recent commit that was found in the
repository was 2021-03-16.) If you discover any rendering problems
in this HTML version of the page, or you believe there is a better
or more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to email@example.com
Linux ACL March 23, 2002 Linux ACL