--- a/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c	Thu May 28 11:43:30 2020
+++ b/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c	Wed May 20 19:29:11 2020
@@ -499,7 +499,41 @@
     return (jint)res;
 }
 
+JNIEXPORT jlong JNICALL
+Java_sun_nio_fs_UnixNativeDispatcher_fopen0(JNIEnv* env, jclass this,
+    jlong pathAddress, jlong modeAddress)
+{
+    FILE* fp = NULL;
+    const char* path = (const char*)jlong_to_ptr(pathAddress);
+    const char* mode = (const char*)jlong_to_ptr(modeAddress);
+
+    do {
+        fp = fopen(path, mode);
+    } while (fp == NULL && errno == EINTR);
+
+    if (fp == NULL) {
+        throwUnixException(env, errno);
+    }
+
+    return ptr_to_jlong(fp);
+}
+
 JNIEXPORT void JNICALL
+Java_sun_nio_fs_UnixNativeDispatcher_fclose(JNIEnv* env, jclass this, jlong stream)
+{
+    FILE* fp = jlong_to_ptr(stream);
+
+    /* NOTE: fclose() wrapper is only used with read-only streams.
+     * If it ever is used with write streams, it might be better to add
+     * RESTARTABLE(fflush(fp)) before closing, to make sure the stream
+     * is completely written even if fclose() failed.
+     */
+    if (fclose(fp) == EOF && errno != EINTR) {
+        throwUnixException(env, errno);
+    }
+}
+
+JNIEXPORT void JNICALL
 Java_sun_nio_fs_UnixNativeDispatcher_rewind(JNIEnv* env, jclass this, jlong stream)
 {
     FILE* fp = jlong_to_ptr(stream);
@@ -1262,6 +1296,33 @@
     }
 }
 
+JNIEXPORT jlong JNICALL
+Java_sun_nio_fs_UnixNativeDispatcher_pathconf0(JNIEnv* env, jclass this,
+    jlong pathAddress, jint name)
+{
+    long err;
+    const char* path = (const char*)jlong_to_ptr(pathAddress);
+
+    err = pathconf(path, (int)name);
+    if (err == -1) {
+        throwUnixException(env, errno);
+    }
+    return (jlong)err;
+}
+
+JNIEXPORT jlong JNICALL
+Java_sun_nio_fs_UnixNativeDispatcher_fpathconf(JNIEnv* env, jclass this,
+    jint fd, jint name)
+{
+    long err;
+
+    err = fpathconf((int)fd, (int)name);
+    if (err == -1) {
+        throwUnixException(env, errno);
+    }
+    return (jlong)err;
+}
+
 JNIEXPORT void JNICALL
 Java_sun_nio_fs_UnixNativeDispatcher_mknod0(JNIEnv* env, jclass this,
     jlong pathAddress, jint mode, jlong dev)