1 /*
2 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include "jni.h"
27 #include "jni_util.h"
28 #include "jvm.h"
29
30 #include <stdlib.h>
31 #include <unistd.h>
32 #include <termios.h>
33
34 #include <nativehelper/JNIHelp.h>
35
36 #define NATIVE_METHOD(className, functionName, signature) \
37 { #functionName, signature, (void*)(Java_java_io_ ## className ## _ ## functionName) }
38
39 JNIEXPORT jboolean JNICALL
Java_java_io_Console_istty(JNIEnv * env,jclass cls)40 Java_java_io_Console_istty(JNIEnv *env, jclass cls)
41 {
42 return isatty(fileno(stdin)) && isatty(fileno(stdout));
43 }
44
45 JNIEXPORT jstring JNICALL
Java_java_io_Console_encoding(JNIEnv * env,jclass cls)46 Java_java_io_Console_encoding(JNIEnv *env, jclass cls)
47 {
48 return NULL;
49 }
50
51 JNIEXPORT jboolean JNICALL
Java_java_io_Console_echo(JNIEnv * env,jclass cls,jboolean on)52 Java_java_io_Console_echo(JNIEnv *env,
53 jclass cls,
54 jboolean on)
55 {
56 struct termios tio;
57 jboolean old;
58 int tty = fileno(stdin);
59 if (tcgetattr(tty, &tio) == -1) {
60 JNU_ThrowIOExceptionWithLastError(env, "tcgetattr failed");
61 return !on;
62 }
63 old = (tio.c_lflag & ECHO);
64 if (on) {
65 tio.c_lflag |= ECHO;
66 } else {
67 tio.c_lflag &= ~ECHO;
68 }
69 if (tcsetattr(tty, TCSANOW, &tio) == -1) {
70 JNU_ThrowIOExceptionWithLastError(env, "tcsetattr failed");
71 }
72 return old;
73 }
74
75 static JNINativeMethod gMethods[] = {
76 NATIVE_METHOD(Console, istty, "()Z"),
77 NATIVE_METHOD(Console, encoding, "()Ljava/lang/String;"),
78 NATIVE_METHOD(Console, echo, "(Z)Z"),
79 };
80
register_java_io_Console(JNIEnv * env)81 void register_java_io_Console(JNIEnv* env) {
82 jniRegisterNativeMethods(env, "java/io/Console", gMethods, NELEM(gMethods));
83 }
84