+ /* The flags in the ace_t structure changed in a binary incompatible way
+ when ACL_NO_TRIVIAL etc. were introduced in <sys/acl.h> version 1.15.
+ How to distinguish the two conventions at runtime?
+ In the old convention, usually three ACEs have a_flags = ACE_OWNER /
+ ACE_GROUP / ACE_OTHER, in the range 0x0100..0x0400. In the new
+ convention, these values are not used. */
+ int old_convention = 0;
+
+ for (i = 0; i < count; i++)
+ if (entries[i].a_flags & (OLD_ACE_OWNER | OLD_ACE_GROUP | OLD_ACE_OTHER))
+ {
+ old_convention = 1;
+ break;
+ }
+
+ if (old_convention)
+ /* Running on Solaris 10. */
+ for (i = 0; i < count; i++)
+ {
+ ace_t *ace = &entries[i];
+
+ /* Note:
+ If ace->a_flags = ACE_OWNER, ace->a_who is the st_uid from stat().
+ If ace->a_flags = ACE_GROUP, ace->a_who is the st_gid from stat().
+ We don't need to check ace->a_who in these cases. */
+ if (!(ace->a_type == OLD_ALLOW
+ && (ace->a_flags == OLD_ACE_OWNER
+ || ace->a_flags == OLD_ACE_GROUP
+ || ace->a_flags == OLD_ACE_OTHER)))
+ return 1;
+ }
+ else
+ {
+ /* Running on Solaris 10 (newer version) or Solaris 11. */
+ unsigned int access_masks[6] =
+ {
+ 0, /* owner@ deny */
+ 0, /* owner@ allow */
+ 0, /* group@ deny */
+ 0, /* group@ allow */
+ 0, /* everyone@ deny */
+ 0 /* everyone@ allow */
+ };
+
+ for (i = 0; i < count; i++)
+ {
+ ace_t *ace = &entries[i];
+ unsigned int index1;
+ unsigned int index2;
+
+ if (ace->a_type == NEW_ACE_ACCESS_ALLOWED_ACE_TYPE)
+ index1 = 1;
+ else if (ace->a_type == NEW_ACE_ACCESS_DENIED_ACE_TYPE)
+ index1 = 0;
+ else
+ return 1;
+
+ if (ace->a_flags == NEW_ACE_OWNER)
+ index2 = 0;
+ else if (ace->a_flags == (NEW_ACE_GROUP | NEW_ACE_IDENTIFIER_GROUP))
+ index2 = 2;
+ else if (ace->a_flags == NEW_ACE_EVERYONE)
+ index2 = 4;
+ else
+ return 1;
+
+ access_masks[index1 + index2] |= ace->a_access_mask;
+ }
+
+ /* The same bit shouldn't be both allowed and denied. */
+ if (access_masks[0] & access_masks[1])
+ return 1;
+ if (access_masks[2] & access_masks[3])
+ return 1;
+ if (access_masks[4] & access_masks[5])
+ return 1;
+
+ /* Check minimum masks. */
+ if ((NEW_ACE_WRITE_NAMED_ATTRS
+ | NEW_ACE_WRITE_ATTRIBUTES
+ | NEW_ACE_WRITE_ACL
+ | NEW_ACE_WRITE_OWNER)
+ & ~ access_masks[1])
+ return 1;
+ access_masks[1] &= ~(NEW_ACE_WRITE_NAMED_ATTRS
+ | NEW_ACE_WRITE_ATTRIBUTES
+ | NEW_ACE_WRITE_ACL
+ | NEW_ACE_WRITE_OWNER);
+ if ((NEW_ACE_WRITE_NAMED_ATTRS
+ | NEW_ACE_WRITE_ATTRIBUTES
+ | NEW_ACE_WRITE_ACL
+ | NEW_ACE_WRITE_OWNER)
+ & ~ access_masks[4])
+ return 1;
+ access_masks[4] &= ~(NEW_ACE_WRITE_NAMED_ATTRS
+ | NEW_ACE_WRITE_ATTRIBUTES
+ | NEW_ACE_WRITE_ACL
+ | NEW_ACE_WRITE_OWNER);
+ if ((NEW_ACE_READ_NAMED_ATTRS
+ | NEW_ACE_READ_ATTRIBUTES
+ | NEW_ACE_READ_ACL
+ | NEW_ACE_SYNCHRONIZE)
+ & ~ access_masks[5])
+ return 1;
+ access_masks[5] &= ~(NEW_ACE_READ_NAMED_ATTRS
+ | NEW_ACE_READ_ATTRIBUTES
+ | NEW_ACE_READ_ACL
+ | NEW_ACE_SYNCHRONIZE);
+
+ /* Check the allowed or denied bits. */
+ if ((access_masks[0] | access_masks[1])
+ != (NEW_ACE_READ_DATA
+ | NEW_ACE_WRITE_DATA | NEW_ACE_APPEND_DATA
+ | NEW_ACE_EXECUTE))
+ return 1;
+ if ((access_masks[2] | access_masks[3])
+ != (NEW_ACE_READ_DATA
+ | NEW_ACE_WRITE_DATA | NEW_ACE_APPEND_DATA
+ | NEW_ACE_EXECUTE))
+ return 1;
+ if ((access_masks[4] | access_masks[5])
+ != (NEW_ACE_READ_DATA
+ | NEW_ACE_WRITE_DATA | NEW_ACE_APPEND_DATA
+ | NEW_ACE_EXECUTE))
+ return 1;
+
+ /* Check that the NEW_ACE_WRITE_DATA and NEW_ACE_APPEND_DATA bits are
+ either both allowed or both denied. */
+ if (((access_masks[0] & NEW_ACE_WRITE_DATA) != 0)
+ != ((access_masks[0] & NEW_ACE_APPEND_DATA) != 0))
+ return 1;
+ if (((access_masks[2] & NEW_ACE_WRITE_DATA) != 0)
+ != ((access_masks[2] & NEW_ACE_APPEND_DATA) != 0))
+ return 1;
+ if (((access_masks[4] & NEW_ACE_WRITE_DATA) != 0)
+ != ((access_masks[4] & NEW_ACE_APPEND_DATA) != 0))
+ return 1;
+ }
+
+ return 0;
+}
+
+# endif
+
+#elif USE_ACL && HAVE_GETACL /* HP-UX */
+
+/* Return 1 if the given ACL is non-trivial.
+ Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
+int
+acl_nontrivial (int count, struct acl_entry *entries, struct stat *sb)
+{
+ int i;
+
+ for (i = 0; i < count; i++)
+ {
+ struct acl_entry *ace = &entries[i];
+
+ if (!((ace->uid == sb->st_uid && ace->gid == ACL_NSGROUP)
+ || (ace->uid == ACL_NSUSER && ace->gid == sb->st_gid)
+ || (ace->uid == ACL_NSUSER && ace->gid == ACL_NSGROUP)))
+ return 1;
+ }
+ return 0;
+}
+
+# if HAVE_ACLV_H /* HP-UX >= 11.11 */
+
+/* Return 1 if the given ACL is non-trivial.
+ Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
+int
+aclv_nontrivial (int count, struct acl *entries)
+{
+ int i;
+
+ for (i = 0; i < count; i++)
+ {
+ struct acl *ace = &entries[i];
+
+ /* Note: If ace->a_type = USER_OBJ, ace->a_id is the st_uid from stat().
+ If ace->a_type = GROUP_OBJ, ace->a_id is the st_gid from stat().
+ We don't need to check ace->a_id in these cases. */
+ if (!(ace->a_type == USER_OBJ /* no need to check ace->a_id here */
+ || ace->a_type == GROUP_OBJ /* no need to check ace->a_id here */
+ || ace->a_type == CLASS_OBJ
+ || ace->a_type == OTHER_OBJ))
+ return 1;
+ }
+ return 0;
+}
+
+# endif
+
+#elif USE_ACL && (HAVE_ACLX_GET || HAVE_STATACL) /* AIX */
+
+/* Return 1 if the given ACL is non-trivial.
+ Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
+int
+acl_nontrivial (struct acl *a)
+{
+ /* The normal way to iterate through an ACL is like this:
+ struct acl_entry *ace;
+ for (ace = a->acl_ext; ace != acl_last (a); ace = acl_nxt (ace))
+ {
+ struct ace_id *aei;
+ switch (ace->ace_type)
+ {
+ case ACC_PERMIT:
+ case ACC_DENY:
+ case ACC_SPECIFY:
+ ...;
+ }
+ for (aei = ace->ace_id; aei != id_last (ace); aei = id_nxt (aei))
+ ...
+ }
+ */
+ return (acl_last (a) != a->acl_ext ? 1 : 0);
+}
+
+# if HAVE_ACLX_GET && defined ACL_AIX_WIP /* newer AIX */
+
+/* Return 1 if the given ACL is non-trivial.
+ Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
+int
+acl_nfs4_nontrivial (nfs4_acl_int_t *a)
+{
+# if 1 /* let's try this first */
+ return (a->aclEntryN > 0 ? 1 : 0);
+# else
+ int count = a->aclEntryN;
+ int i;
+