Fix uname system name capitalization in emulated backend

Fixes #486

Author: msimacek

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/PythonOS.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0
@@ -45,25 +45,31 @@
 import com.oracle.truffle.api.strings.TruffleString;
 
 public enum PythonOS {
-    PLATFORM_JAVA("java"),
-    PLATFORM_CYGWIN("cygwin"),
-    PLATFORM_LINUX("linux"),
-    PLATFORM_DARWIN("darwin"),
-    PLATFORM_WIN32("win32"),
-    PLATFORM_SUNOS("sunos"),
-    PLATFORM_FREEBSD("freebsd"),
-    PLATFORM_ANY(null);
+    PLATFORM_JAVA("java", "Java"),
+    PLATFORM_CYGWIN("cygwin", "CYGWIN"),
+    PLATFORM_LINUX("linux", "Linux"),
+    PLATFORM_DARWIN("darwin", "Darwin"),
+    PLATFORM_WIN32("win32", "Windows"),
+    PLATFORM_SUNOS("sunos", "SunOS"),
+    PLATFORM_FREEBSD("freebsd", "FreeBSD"),
+    PLATFORM_ANY(null, null);
 
     private final TruffleString name;
+    private final TruffleString uname;
 
-    PythonOS(String name) {
+    PythonOS(String name, String uname) {
         this.name = toTruffleStringUncached(name);
+        this.uname = toTruffleStringUncached(uname);
     }
 
     public TruffleString getName() {
         return name;
     }
 
+    public TruffleString getUname() {
+        return uname;
+    }
+
     private static final PythonOS current;
 
     static {

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/EmulatedPosixSupport.java

@@ -210,7 +210,6 @@
 import java.util.concurrent.TimeUnit;
 import java.util.logging.Level;
 
-import com.oracle.truffle.api.TruffleOptions;
 import org.graalvm.nativeimage.ImageInfo;
 import org.graalvm.nativeimage.ProcessProperties;
 import org.graalvm.polyglot.io.ProcessHandler.Redirect;
@@ -252,6 +251,7 @@
 import com.oracle.truffle.api.TruffleLanguage;
 import com.oracle.truffle.api.TruffleLanguage.Env;
 import com.oracle.truffle.api.TruffleLogger;
+import com.oracle.truffle.api.TruffleOptions;
 import com.oracle.truffle.api.TruffleSafepoint;
 import com.oracle.truffle.api.dsl.Bind;
 import com.oracle.truffle.api.dsl.Cached;
@@ -1290,7 +1290,7 @@ private static int posixPermissionsToMode(int inputMode, final Set<PosixFilePerm
     @SuppressWarnings("static-method")
     public Object[] uname(
                     @Shared("js2ts") @Cached TruffleString.FromJavaStringNode fromJavaStringNode) {
-        return new Object[]{getPythonOS().getName(), fromJavaStringNode.execute(getHostName(withoutIOSocket), TS_ENCODING),
+        return new Object[]{getPythonOS().getUname(), fromJavaStringNode.execute(getHostName(withoutIOSocket), TS_ENCODING),
                         fromJavaStringNode.execute(getOsVersion(), TS_ENCODING), T_EMPTY_STRING, PythonUtils.getPythonArch()};
     }