Add PathUtils.isPosix(Path, LinkOption...).

Add PathUtils.readAttributes(Path, Class<A>, LinkOption...).

src/main/java/org/apache/commons/io/file/PathUtils.java

@@ -980,6 +980,39 @@ public static boolean isOlder(final Path file, final Path reference) throws IOEx
         return isOlder(file, getLastModifiedTime(reference));
     }
 
+    /**
+     * Tests whether the given path is on a POSIX file system.
+     *
+     * @param test The Path to test.
+     * @param options options indicating how to handle symbolic links.
+     * @return true if test is on a POSIX file system.
+     * @since 2.12.0
+     */
+    public static boolean isPosix(final Path test, final LinkOption... options) {
+        return readAttributes(test, PosixFileAttributes.class, options) != null;
+    }
+
+    /**
+     * Calls {@link Files#readAttributes(Path, Class, LinkOption...)} but returns null instead of throwing
+     * {@link UnsupportedOperationException} or {@link IOException}.
+     *
+     * @param <A> The {@code BasicFileAttributes} type
+     * @param test The Path to test.
+     * @param type the {@code Class} of the file attributes required to read.
+     * @param options options indicating how to handle symbolic links.
+     * @return the file attributes.
+     * @since 2.12.0
+     */
+    public static <A extends BasicFileAttributes> A readAttributes(final Path test, final Class<A> type, final LinkOption... options) {
+        try {
+            return Files.readAttributes(test, type, options);
+        } catch (final UnsupportedOperationException e) {
+            return null;
+        } catch (final IOException e) {
+            return null;
+        }
+    }
+
     /**
      * Tests whether the given {@code Path} is a regular file or not. Implemented as a null-safe delegate to
      * {@code Files.isRegularFile(Path path, LinkOption... options)}.

src/test/java/org/apache/commons/io/file/PathUtilsTest.java

@@ -20,6 +20,7 @@
 import static org.junit.jupiter.api.Assertions.assertArrayEquals;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assumptions.assumeFalse;
 
@@ -35,6 +36,7 @@
 import java.nio.file.Paths;
 import java.nio.file.attribute.DosFileAttributeView;
 import java.nio.file.attribute.PosixFileAttributeView;
+import java.nio.file.attribute.PosixFileAttributes;
 import java.nio.file.attribute.PosixFilePermission;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -186,6 +188,19 @@ public void testIsDirectory() throws IOException {
         assertFalse(PathUtils.isDirectory(tempDir));
     }
 
+    @Test
+    public void testIsPosix() throws IOException {
+        boolean isPosix;
+        try {
+            Files.getPosixFilePermissions(PathUtils.current());
+            isPosix = true;
+        } catch (UnsupportedOperationException e) {
+            isPosix = false;
+        }
+        assertEquals(isPosix, PathUtils.isPosix(PathUtils.current()));
+        assertEquals(false, PathUtils.isPosix(Paths.get("does not.exist")));
+    }
+
     @Test
     public void testIsRegularFile() throws IOException {
         assertFalse(PathUtils.isRegularFile(null));
@@ -237,6 +252,19 @@ public void testNewOutputStreamNewFileAppendTrue() throws IOException {
         testNewOutputStreamNewFile(true);
     }
 
+    @Test
+    public void testReadAttributesPosix() throws IOException {
+        boolean isPosix;
+        try {
+            Files.getPosixFilePermissions(PathUtils.current());
+            isPosix = true;
+        } catch (UnsupportedOperationException e) {
+            isPosix = false;
+        }
+        assertEquals(isPosix, PathUtils.readAttributes(PathUtils.current(), PosixFileAttributes.class) != null);
+        assertNull(PathUtils.readAttributes(Paths.get("does not.exist"), PosixFileAttributes.class));
+    }
+
     @Test
     public void testReadStringEmptyFile() throws IOException {
         final Path path = Paths.get("src/test/resources/org/apache/commons/io/test-file-empty.bin");