acl_calc_mask -- calculate and set ACL mask permissions
Standard C Library (libc, -lc)
The acl_calc_mask() function is a POSIX.1e call that calculates and set
the permissions associated with the ACL_MASK ACL entry of the ACL
referred to by acl_p.
The value of new permissions are the union of the permissions granted by
the ACL_GROUP, ACL_GROUP_OBJ, ACL_USER tag types which match processes in
the file group class contained in the ACL referred to by acl_p.
If the ACL referred to by acl_p already contains an ACL_MASK entry, its
permissions shall be overwritten; if it does not contain an ACL_MASK
entry, one shall be added.
The acl_calc_mask() function returns the value 0 if successful; otherwise
the value -1 is returned and the global variable errno is set to indicate
The acl_calc_mask() function fails if:
[EINVAL] Argument acl_p does not point to a pointer to a valid
acl(3), acl_get_entry(3), acl_valid(3), posix1e(3)
POSIX.1e is described in IEEE POSIX.1e draft 17.
POSIX.1e support was introduced in FreeBSD 4.0. The acl_calc_mask()
function was added in FreeBSD 5.0.
The acl_calc_mask() function was written by Chris D. Faulhaber
FreeBSD 5.2.1 March 10, 2001 FreeBSD 5.2.1 [ Back ]