ACL_SET(3) BSD Library Functions Manual ACL_SET(3)
acl_set_fd, acl_set_fd_np, acl_set_file, acl_set_link_np -- set an ACL for a file
Standard C Library (libc, -lc)
acl_set_fd(int fd, acl_t acl);
acl_set_fd_np(int fd, acl_t acl, acl_type_t type);
acl_set_file(const char *path_p, acl_type_t type, acl_t acl);
acl_set_link_np(const char *path_p, acl_type_t type, acl_t acl);
The acl_set_fd(), acl_set_fd_np(), acl_set_file(), and acl_set_link_np() each associate an
ACL with an object referred to by fd or path_p. The acl_set_fd_np() and acl_set_link_np()
functions are not POSIX.1e calls. The acl_set_fd() function allows only the setting of ACLs
of type ACL_TYPE_ACCESS where as acl_set_fd_np() allows the setting of ACLs of any type.
The acl_set_link_np() function acts on a symlink rather than its target, if the target of
the path is a symlink.
Valid values for the type argument are:
ACL_TYPE_ACCESS POSIX.1e access ACL
ACL_TYPE_DEFAULT POSIX.1e default ACL
ACL_TYPE_NFS4 NFSv4 ACL
Trying to set ACL_TYPE_NFS4 with acl branded as POSIX.1e, or ACL_TYPE_ACCESS or
ACL_TYPE_DEFAULT with ACL branded as NFSv4, will result in error.
FreeBSD's support for POSIX.1e interfaces and features is still under development at this
Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and
the global variable errno is set to indicate the error.
If any of the following conditions occur, these functions shall return -1 and set 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.
[EBADF] The fd argument is not a valid file descriptor.
[EINVAL] Argument acl does not point to a valid ACL for this object, or the ACL
type specified in type is invalid for this object, or there is branding
[ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire path name
exceeded 1023 characters.
[ENOENT] The named object does not exist, or the path_p argument points to an
[ENOMEM] Insufficient memory available to fulfill request.
[ENOSPC] The directory or file system that would contain the new ACL cannot be
extended, or the file system is out of file allocation resources.
[EOPNOTSUPP] The file system does not support ACL retrieval.
[EROFS] This function requires modification of a file system which is currently
acl(3), acl_delete(3), acl_get(3), acl_get_brand_np(3), acl_valid(3), posix1e(3)
POSIX.1e is described in IEEE POSIX.1e draft 17. Discussion of the draft continues on the
cross-platform POSIX.1e implementation mailing list. To join this list, see the FreeBSD
POSIX.1e implementation page for more information.
POSIX.1e support was introduced in FreeBSD 4.0, and development continues.
Robert N M Watson
BSD June 25, 2009 BSD