}

    @Requires(UnitTestPreconditions.FilePermissions)
    def "snapshotting unreadable #type fails"() {
        given:
        def rootDir = tmpDir.createDir("root")
        rootDir.file('readableFile').createFile()
        rootDir.file('readableDirectory').createDir()

        def unreadable = rootDir.file('unreadable')
        unreadable."create${type.capitalize()}"().makeUnreadable()

        when:

    @Issue('https://github.com/gradle/gradle/issues/9576')
    def "unreadable #type not produced by task fails"() {
        given:
        def input = file("readableFile.txt").createFile()

        def outputDirectory = file("output")
        def unreadableOutput = file("${outputDirectory.name}/unreadable${type.capitalize()}")
        create(unreadableOutput).makeUnreadable()

        buildFile << """

                .withAdvice("Declare the task as untracked by using Task.doNotTrackState().");
        } else if (isDestinationDir && task instanceof Sync) {
            builder.withSummary("Cannot access a file in the destination directory.")
                .withContext("Syncing to a directory which contains unreadable content is not supported.")

        expect:
        fails 'syncIt'

        cleanup:
        ins.close()
    }

    @Requires(UnitTestPreconditions.FilePermissions)
    def "sync fails when the output contains unreadable files"() {
        given:
        def input = file("readableFile.txt").createFile()

        def outputDirectory = file("output")
        def unreadableOutput = outputDirectory.file("unreadableFile").createFile()

        }
        return null;
    }

    private Properties read(File touchfile) {
        if (!touchfile.canRead()) {
            getLogger().debug("Skipped unreadable resolution tracking file: " + touchfile);
            return null;
        }

        synchronized (touchfile.getAbsolutePath().intern()) {
            try {
                Properties props = new Properties();

      val header = Buffer()
      fileOperator.read(0, header, FILE_HEADER_SIZE)
      val prefix = header.readByteString(PREFIX_CLEAN.size.toLong())
      if (prefix != PREFIX_CLEAN) throw IOException("unreadable cache file")
      val upstreamSize = header.readLong()
      val metadataSize = header.readLong()

      // Read the metadata.
      val metadataBuffer = Buffer()

	// auxv, such as when loaded as a library on Android.
	// Fall back to /proc/self/auxv.
	fd := open(&procAuxv[0], 0 /* O_RDONLY */, 0)
	if fd < 0 {
		// On Android, /proc/self/auxv might be unreadable (issue 9229), so we fallback to
		// try using mincore to detect the physical page size.
		// mincore should return EINVAL when address is not a multiple of system page size.

	filepath.WalkDir(dir, func(path string, info fs.DirEntry, err error) error {
		// chmod not only directories, but also things that we couldn't even stat
		// due to permission errors: they may also be unreadable directories.
		if err != nil || info.IsDir() {
			os.Chmod(path, 0777)
		}
		return nil
	})
	return robustio.RemoveAll(dir)
}

  /* application types */
  /**
   * As described in <a href="http://www.ietf.org/rfc/rfc3023.txt">RFC 3023</a>, this constant
   * ({@code application/xml}) is used for XML documents that are "unreadable by casual users."
   * {@link #XML_UTF_8} is provided for documents that may be read by users.
   *
   * @since 14.0
   */

  /* application types */
  /**
   * As described in <a href="http://www.ietf.org/rfc/rfc3023.txt">RFC 3023</a>, this constant
   * ({@code application/xml}) is used for XML documents that are "unreadable by casual users."
   * {@link #XML_UTF_8} is provided for documents that may be read by users.
   *
   * @since 14.0
   */