1 files changed, 47 insertions, 0 deletions
diff --git a/lib/ffi-xattr/darwin_lib.rb b/lib/ffi-xattr/darwin_lib.rb
new file mode 100644
index 0000000..59f0810
--- /dev/null
+++ b/lib/ffi-xattr/darwin_lib.rb
@@ -0,0 +1,47 @@
+class Xattr # :nodoc: all
+  module Lib
+    extend FFI::Library
+
+    ffi_lib "System"
+
+    attach_function :listxattr,   [:string, :pointer, :size_t, :int], :ssize_t
+    attach_function :getxattr,    [:string, :string, :pointer, :size_t, :uint, :int], :ssize_t
+    attach_function :setxattr,    [:string, :string, :pointer, :size_t, :uint, :int], :int
+    attach_function :removexattr, [:string, :string, :int], :int
+
+    XATTR_NOFOLLOW = 0x0001
+
+    class << self
+      def list(path, no_follow)
+        options = no_follow ? XATTR_NOFOLLOW : 0
+        size = listxattr(path, nil, 0, options)
+        res_ptr = FFI::MemoryPointer.new(:pointer, size)
+        listxattr(path, res_ptr, size, options)
+
+        res_ptr.read_string(size).split("\000")
+      end
+
+      def get(path, no_follow, key)
+        options = no_follow ? XATTR_NOFOLLOW : 0
+        size = getxattr(path, key, nil, 0, 0, options)
+        return unless size > 0
+
+        str_ptr = FFI::MemoryPointer.new(:char, size)
+        getxattr(path, key, str_ptr, size, 0, options)
+
+        str_ptr.read_string(size)
+      end
+
+      def set(path, no_follow, key, value)
+        options = no_follow ? XATTR_NOFOLLOW : 0
+        Error.check setxattr(path, key, value, value.bytesize, 0, options)
+      end
+
+      def remove(path, no_follow, key)
+        options = no_follow ? XATTR_NOFOLLOW : 0
+        Error.check removexattr(path, key, options)
+      end
+    end
+
+  end
+end