Merge from gnulib

This incorporates:
2015-07-05 acl-permissions: Document FreeBSD ACL_TYPE_NFS4 acls
2015-07-05 acl-permissions: Fix on FreeBSD
2015-07-05 file-has-acl, acl-permissions: fix some more HP-UX typos
* lib/acl-internal.c, lib/acl-internal.h, lib/get-permissions.c:
* lib/set-permissions.c: Copy from gnulib.

4 files changed, 30 insertions, 1 deletions

diff --git a/lib/acl-internal.c b/lib/acl-internal.c
index 1a2f8c44bf7..1eaa671bd37 100644
--- a/lib/acl-internal.c
+++ b/lib/acl-internal.c
@@ -115,6 +115,13 @@ acl_access_nontrivial (acl_t acl)
 #  endif
 }
 
+int
+acl_default_nontrivial (acl_t acl)
+{
+  /* acl is non-trivial if it is non-empty.  */
+  return (acl_entries (acl) > 0);
+}
+
 # endif
 
 #elif USE_ACL && HAVE_FACL && defined GETACL /* Solaris, Cygwin, not HP-UX */
diff --git a/lib/acl-internal.h b/lib/acl-internal.h
index 4f042adc96b..38a4ab2eb3a 100644
--- a/lib/acl-internal.h
+++ b/lib/acl-internal.h
@@ -155,6 +155,12 @@ extern int acl_extended_nontrivial (acl_t);
    Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.
    Return -1 and set errno upon failure to determine it.  */
 extern int acl_access_nontrivial (acl_t);
+
+/* ACL is an ACL, from a file, stored as type ACL_TYPE_DEFAULT.
+   Return 1 if the given ACL is non-trivial.
+   Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.
+   Return -1 and set errno upon failure to determine it.  */
+extern int acl_default_nontrivial (acl_t);
 #  endif
 
 # elif HAVE_FACL && defined GETACL /* Solaris, Cygwin, not HP-UX */
diff --git a/lib/get-permissions.c b/lib/get-permissions.c
index 6c6618df989..459513c9251 100644
--- a/lib/get-permissions.c
+++ b/lib/get-permissions.c
@@ -60,6 +60,12 @@ get_permissions (const char *name, int desc, mode_t mode,
         return -1;
     }
 
+# if HAVE_ACL_TYPE_NFS4  /* FreeBSD */
+
+  /* TODO (see set_permissions). */
+
+# endif
+
 #  else /* HAVE_ACL_TYPE_EXTENDED */
   /* Mac OS X */
 
diff --git a/lib/set-permissions.c b/lib/set-permissions.c
index 25c463d966d..1aa5b4941c7 100644
--- a/lib/set-permissions.c
+++ b/lib/set-permissions.c
@@ -530,7 +530,8 @@ set_acls (struct permission_context *ctx, const char *name, int desc,
               *acls_set = true;
               if (S_ISDIR(ctx->mode))
                 {
-                  if (! from_mode && ctx->default_acl)
+                  if (! from_mode && ctx->default_acl &&
+                      acl_default_nontrivial (ctx->default_acl))
                     ret = acl_set_file (name, ACL_TYPE_DEFAULT,
                                         ctx->default_acl);
                   else
@@ -540,6 +541,15 @@ set_acls (struct permission_context *ctx, const char *name, int desc,
         }
     }
 
+# if HAVE_ACL_TYPE_NFS4  /* FreeBSD */
+
+  /* File systems either support POSIX ACLs (for example, ufs) or NFS4 ACLs
+     (for example, zfs). */
+
+  /* TODO: Implement setting ACLs once get_permissions() reads them. */
+
+# endif
+
 #  else /* HAVE_ACL_TYPE_EXTENDED */
   /* Mac OS X */