Update "data last opened" attribute on file start (#3707)

iina/PlayerCore.swift

@@ -1052,6 +1052,23 @@ class PlayerCore: NSObject {
       URL(fileURLWithPath: path)
     info.isNetworkResource = !info.currentURL!.isFileURL
 
+    // set "date last opened" attribute
+    if let url = info.currentURL, url.isFileURL {
+      // the required data is a timespec struct
+      var ts = timespec()
+      let time = Date().timeIntervalSince1970
+      ts.tv_sec = Int(time)
+      ts.tv_nsec = Int(time.truncatingRemainder(dividingBy: 1) * 1_000_000_000)
+      let data = Data(bytesOf: ts)
+      // set the attribute; the key is undocumented
+      let name = "com.apple.lastuseddate#PS"
+      url.withUnsafeFileSystemRepresentation { fileSystemPath in
+        let _ = data.withUnsafeBytes {
+          setxattr(fileSystemPath, name, $0.baseAddress, data.count, 0, 0)
+        }
+      }
+    }
+
     if #available(OSX 10.13, *), RemoteCommandController.useSystemMediaControl {
       NowPlayingInfoManager.updateInfo(state: .playing, withTitle: true)
     }