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_isatty(JNIEnv *,jclass,jint fd)27 static jboolean Console_isatty(JNIEnv*, jclass, jint fd) {
28 return TEMP_FAILURE_RETRY(isatty(fd));
29 }
30
Console_setEchoImpl(JNIEnv * env,jclass,jboolean on,jint previousState)31 static jint Console_setEchoImpl(JNIEnv* env, jclass, jboolean on, jint previousState) {
32 termios state;
33 if (TEMP_FAILURE_RETRY(tcgetattr(STDIN_FILENO, &state)) == -1) {
34 jniThrowIOException(env, errno);
35 return 0;
36 }
37 if (on) {
38 state.c_lflag = previousState;
39 } else {
40 previousState = state.c_lflag;
41 state.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
42 }
43 if (TEMP_FAILURE_RETRY(tcsetattr(STDIN_FILENO, TCSAFLUSH, &state)) == -1){
44 jniThrowIOException(env, errno);
45 return 0;
46 }
47 return previousState;
48 }
49
50 static JNINativeMethod gMethods[] = {
51 NATIVE_METHOD(Console, isatty, "(I)Z"),
52 NATIVE_METHOD(Console, setEchoImpl, "(ZI)I"),
53 };
register_java_io_Console(JNIEnv * env)54 int register_java_io_Console(JNIEnv* env) {
55 return jniRegisterNativeMethods(env, "java/io/Console", gMethods, NELEM(gMethods));
56 }
57