acl_set_qualifier —
set ACL tag qualifier
Standard C Library (libc, -lc)
#include <sys/types.h>
#include <sys/acl.h>
int
  
  acl_set_qualifier(acl_entry_t
    entry_d, const void
    *tag_qualifier_p);
The acl_set_qualifier() function is a POSIX.1e call that
  sets the qualifier of the tag for the ACL entry entry_d
  to the value referred to by tag_qualifier_p.
The acl_set_qualifier() function returns the
  value 0 if successful; otherwise the value -1 is returned and
  the global variable errno is set to indicate the error.
The acl_set_qualifier() function fails if:
  - [EINVAL]
- Argument entry_d is not a valid descriptor for an
      ACL entry. The tag type of the ACL entry entry_d is
      not ACL_USERorACL_GROUP.
      The value pointed to by tag_qualifier_p is not
      valid.
- [ENOMEM]
- The value to be returned requires more memory than is allowed by the
      hardware or system-imposed memory management constraints.
POSIX.1e is described in IEEE POSIX.1e draft 17.
POSIX.1e support was introduced in FreeBSD 4.0. Theacl_get_qualifier() function was added in
  FreeBSD 5.0.
The acl_get_qualifier() function was written by
  Chris D. Faulhaber
  <jedgar@fxp.org>.