replace WindowsUtil with OS enum

src/main/java/org/cryptomator/frontend/fuse/OS.java

@@ -0,0 +1,32 @@
+package org.cryptomator.frontend.fuse;
+
+enum OS {
+ LINUX,
+ MAC,
+ WINDOWS,
+ UNKNOWN;
+
+ private static String osName() {
+ class Holder {
+ private static final String OS_NAME = System.getProperty("os.name", "").toLowerCase();
+ }
+ return Holder.OS_NAME;
+ }
+
+ public static OS current() {
+ var name = osName();
+ if (name.contains("linux")) {
+ return LINUX;
+ } else if (name.contains("mac")) {
+ return MAC;
+ } else if (name.contains("windows")) {
+ return WINDOWS;
+ } else {
+ return UNKNOWN;
+ }
+ }
+
+ public boolean isCurrent() {
+ return equals(OS.current());
+ }
+}

src/main/java/org/cryptomator/frontend/fuse/ReadWriteAdapter.java

@@ -160,7 +160,7 @@ public int chmod(String path, int mode, FileInfo fi) {
  LOG.warn("chmod {} failed, file not found.", path);
  return -errno.enoent();
  } catch (UnsupportedOperationException e) {
- if (!WindowsUtil.IS_RUNNING_OS) { //prevent spamming warnings
+ if (OS.WINDOWS.isCurrent()) { //prevent spamming warnings
  LOG.warn("Setting posix permissions not supported by underlying file system.");
  }
  return -errno.enosys();