acl_get_flagset_np —
retrieve flagset from an NFSv4 ACL entry
Standard C Library (libc, -lc)
#include <sys/types.h>
#include <sys/acl.h>
int
  
  acl_get_flagset_np(acl_entry_t
    entry_d, acl_flagset_t
    *flagset_p);
The acl_get_flagset_np() function is a non-portable call
  that returns via flagset_np_p a descriptor to the
  flagset in the NFSv4 ACL entry entry_d. Subsequent
  operations using the returned flagset operate on the flagset within the ACL
  entry.
The acl_get_flagset_np() 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_get_flagset_np() function fails if:
  - [EINVAL]
- Argument entry_d is not a valid descriptor for an
      ACL entry.
POSIX.1e is described in IEEE POSIX.1e draft 17.
POSIX.1e support was introduced in FreeBSD 4.0. Theacl_get_flagset_np() function was added in
  FreeBSD 8.0.
The acl_get_flagset_np() function was written by
  Edward Tomasz Napierala
  <trasz@FreeBSD.org>.