1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 #define LOG_TAG "Console"
19
20 #include "JNIHelp.h"
21 #include "JniConstants.h"
22
23 #include <errno.h>
24 #include <termios.h>
25 #include <unistd.h>
26
Console_setEchoImpl(JNIEnv * env,jclass,jboolean on,jint previousState)27 static jint Console_setEchoImpl(JNIEnv* env, jclass, jboolean on, jint previousState) {
28 termios state;
29 if (TEMP_FAILURE_RETRY(tcgetattr(STDIN_FILENO, &state)) == -1) {
30 jniThrowIOException(env, errno);
31 return 0;
32 }
33 if (on) {
34 state.c_lflag = previousState;
35 } else {
36 previousState = state.c_lflag;
37 state.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
38 }
39 if (TEMP_FAILURE_RETRY(tcsetattr(STDIN_FILENO, TCSAFLUSH, &state)) == -1){
40 jniThrowIOException(env, errno);
41 return 0;
42 }
43 return previousState;
44 }
45
46 static JNINativeMethod gMethods[] = {
47 NATIVE_METHOD(Console, setEchoImpl, "(ZI)I"),
48 };
register_java_io_Console(JNIEnv * env)49 void register_java_io_Console(JNIEnv* env) {
50 jniRegisterNativeMethods(env, "java/io/Console", gMethods, NELEM(gMethods));
51 }
52