Add a constant to ErrnoFileStatus for ENODATA initialized from JNI.

Rename the intermediate variables used to propagate errno from JNI to conform to the naming style.

PiperOrigin-RevId: 429181816

Author: alexjski

src/main/java/com/google/devtools/build/lib/unix/ErrnoFileStatus.java

@@ -31,14 +31,16 @@ public class ErrnoFileStatus extends FileStatus {
   public static final int ELOOP;
   public static final int ENOTDIR;
   public static final int ENAMETOOLONG;
+  public static final int ENODATA;
 
   static {
     ErrnoConstants constants = ErrnoConstants.getErrnoConstants();
-    ENOENT = constants.ENOENT;
-    EACCES = constants.EACCES;
-    ELOOP = constants.ELOOP;
-    ENOTDIR = constants.ENOTDIR;
-    ENAMETOOLONG = constants.ENAMETOOLONG;
+    ENOENT = constants.errnoENOENT;
+    EACCES = constants.errnoEACCES;
+    ELOOP = constants.errnoELOOP;
+    ENOTDIR = constants.errnoENOTDIR;
+    ENAMETOOLONG = constants.errnoENAMETOOLONG;
+    ENODATA = constants.errnoENODATA;
   }
 
   /**
@@ -73,11 +75,12 @@ public boolean hasError() {
   private static class ErrnoConstants {
 
     // These are set in JNI.
-    private int ENOENT;
-    private int EACCES;
-    private int ELOOP;
-    private int ENOTDIR;
-    private int ENAMETOOLONG;
+    private int errnoENOENT;
+    private int errnoEACCES;
+    private int errnoELOOP;
+    private int errnoENOTDIR;
+    private int errnoENAMETOOLONG;
+    private int errnoENODATA;
 
     public static ErrnoConstants getErrnoConstants() {
       ErrnoConstants constants = new ErrnoConstants();

src/main/native/unix_jni.cc

@@ -384,11 +384,12 @@ extern "C" JNIEXPORT void JNICALL
 Java_com_google_devtools_build_lib_unix_ErrnoFileStatus_00024ErrnoConstants_initErrnoConstants(  // NOLINT
   JNIEnv *env, jobject errno_constants) {
   jclass clazz = env->GetObjectClass(errno_constants);
-  SetIntField(env, clazz, errno_constants, "ENOENT", ENOENT);
-  SetIntField(env, clazz, errno_constants, "EACCES", EACCES);
-  SetIntField(env, clazz, errno_constants, "ELOOP", ELOOP);
-  SetIntField(env, clazz, errno_constants, "ENOTDIR", ENOTDIR);
-  SetIntField(env, clazz, errno_constants, "ENAMETOOLONG", ENAMETOOLONG);
+  SetIntField(env, clazz, errno_constants, "errnoENOENT", ENOENT);
+  SetIntField(env, clazz, errno_constants, "errnoEACCES", EACCES);
+  SetIntField(env, clazz, errno_constants, "errnoELOOP", ELOOP);
+  SetIntField(env, clazz, errno_constants, "errnoENOTDIR", ENOTDIR);
+  SetIntField(env, clazz, errno_constants, "errnoENAMETOOLONG", ENAMETOOLONG);
+  SetIntField(env, clazz, errno_constants, "errnoENODATA", ENODATA);
 }
 
 namespace {