--- a/src/jdk.internal.le/share/classes/jdk/internal/jline/internal/TerminalLineSettings.java Thu Sep 13 01:49:48 2018 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,360 +0,0 @@
-/*
- * Copyright (c) 2002-2016, the original author or authors.
- *
- * This software is distributable under the BSD license. See the terms of the
- * BSD license in the documentation provided with this software.
- *
- * http://www.opensource.org/licenses/bsd-license.php
- */
-package jdk.internal.jline.internal;
-
-import java.io.ByteArrayOutputStream;
-import java.io.Closeable;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.lang.reflect.Method;
-import java.text.MessageFormat;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-import static jdk.internal.jline.internal.Preconditions.checkNotNull;
-
-/**
- * Provides access to terminal line settings via <tt>stty</tt>.
- *
- * @author <a href="mailto:mwp1@cornell.edu">Marc Prud'hommeaux</a>
- * @author <a href="mailto:dwkemp@gmail.com">Dale Kemp</a>
- * @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
- * @author <a href="mailto:jbonofre@apache.org">Jean-Baptiste Onofr\u00E9</a>
- * @author <a href="mailto:gnodet@gmail.com">Guillaume Nodet</a>
- * @since 2.0
- */
-public final class TerminalLineSettings
-{
- public static final String JLINE_STTY = "jline.stty";
-
- public static final String DEFAULT_STTY = "stty";
-
- public static final String JLINE_SH = "jline.sh";
-
- public static final String DEFAULT_SH = "sh";
-
- private static final String UNDEFINED;
-
- public static final String DEFAULT_TTY = "/dev/tty";
-
- private static final boolean SUPPORTS_REDIRECT;
-
- private static final Object REDIRECT_INHERIT;
- private static final Method REDIRECT_INPUT_METHOD;
-
- private static final Map<String, TerminalLineSettings> SETTINGS = new HashMap<String, TerminalLineSettings>();
-
- static {
- if (Configuration.isHpux()) {
- UNDEFINED = "^-";
- } else {
- UNDEFINED = "undef";
- }
-
- boolean supportsRedirect;
- Object redirectInherit = null;
- Method redirectInputMethod = null;
- try {
- Class<?> redirect = Class.forName("java.lang.ProcessBuilder$Redirect");
- redirectInherit = redirect.getField("INHERIT").get(null);
- redirectInputMethod = ProcessBuilder.class.getMethod("redirectInput", redirect);
- supportsRedirect = System.class.getMethod("console").invoke(null) != null;
- } catch (Throwable t) {
- supportsRedirect = false;
- }
- SUPPORTS_REDIRECT = supportsRedirect;
- REDIRECT_INHERIT = redirectInherit;
- REDIRECT_INPUT_METHOD = redirectInputMethod;
- }
-
- private String sttyCommand;
-
- private String shCommand;
-
- private String ttyDevice;
-
- private String config;
- private String initialConfig;
-
- private long configLastFetched;
-
- private boolean useRedirect;
-
- @Deprecated
- public TerminalLineSettings() throws IOException, InterruptedException {
- this(DEFAULT_TTY);
- }
-
- @Deprecated
- public TerminalLineSettings(String ttyDevice) throws IOException, InterruptedException {
- this(ttyDevice, false);
- }
-
- private TerminalLineSettings(String ttyDevice, boolean unused) throws IOException, InterruptedException {
- checkNotNull(ttyDevice);
- this.sttyCommand = Configuration.getString(JLINE_STTY, DEFAULT_STTY);
- this.shCommand = Configuration.getString(JLINE_SH, DEFAULT_SH);
- this.ttyDevice = ttyDevice;
- this.useRedirect = SUPPORTS_REDIRECT && DEFAULT_TTY.equals(ttyDevice);
- this.initialConfig = get("-g").trim();
- this.config = get("-a");
- this.configLastFetched = System.currentTimeMillis();
-
- Log.debug("Config: ", config);
-
- // sanity check
- if (config.length() == 0) {
- throw new IOException(MessageFormat.format("Unrecognized stty code: {0}", config));
- }
- }
-
- public static synchronized TerminalLineSettings getSettings(String device) throws IOException, InterruptedException {
- TerminalLineSettings settings = SETTINGS.get(device);
- if (settings == null) {
- settings = new TerminalLineSettings(device, false);
- SETTINGS.put(device, settings);
- }
- return settings;
- }
-
- public String getTtyDevice() {
- return ttyDevice;
- }
-
- public String getConfig() {
- return config;
- }
-
- public void restore() throws IOException, InterruptedException {
- set(initialConfig);
- }
-
- public String get(final String args) throws IOException, InterruptedException {
- checkNotNull(args);
- return stty(args);
- }
-
- public void set(final String args) throws IOException, InterruptedException {
- checkNotNull(args);
- stty(args.split(" "));
- }
-
- public void set(final String... args) throws IOException, InterruptedException {
- checkNotNull(args);
- stty(args);
- }
-
- public void undef(final String name) throws IOException, InterruptedException {
- checkNotNull(name);
- stty(name, UNDEFINED);
- }
-
- /**
- * <p>
- * Get the value of a stty property, including the management of a cache.
- * </p>
- *
- * @param name the stty property.
- * @return the stty property value.
- */
- public int getProperty(String name) {
- checkNotNull(name);
- if (!fetchConfig(name)) {
- return -1;
- }
- return getProperty(name, config);
- }
-
- public String getPropertyAsString(String name) {
- checkNotNull(name);
- if (!fetchConfig(name)) {
- return null;
- }
- return getPropertyAsString(name, config);
- }
-
- private boolean fetchConfig(String name) {
- long currentTime = System.currentTimeMillis();
- try {
- // tty properties are cached so we don't have to worry too much about getting term width/height
- if (config == null || currentTime - configLastFetched > 1000) {
- config = get("-a");
- }
- } catch (Exception e) {
- if (e instanceof InterruptedException) {
- Thread.currentThread().interrupt();
- }
- Log.debug("Failed to query stty ", name, "\n", e);
- if (config == null) {
- return false;
- }
- }
-
- // always update the last fetched time and try to parse the output
- if (currentTime - configLastFetched > 1000) {
- configLastFetched = currentTime;
- }
- return true;
- }
-
- /**
- * <p>
- * Parses a stty output (provided by stty -a) and return the value of a given property.
- * </p>
- *
- * @param name property name.
- * @param stty string resulting of stty -a execution.
- * @return value of the given property.
- */
- protected static String getPropertyAsString(String name, String stty) {
- // try the first kind of regex
- Pattern pattern = Pattern.compile(name + "\\s+=\\s+(.*?)[;\\n\\r]");
- Matcher matcher = pattern.matcher(stty);
- if (!matcher.find()) {
- // try a second kind of regex
- pattern = Pattern.compile(name + "\\s+([^;]*)[;\\n\\r]");
- matcher = pattern.matcher(stty);
- if (!matcher.find()) {
- // try a second try of regex
- pattern = Pattern.compile("(\\S*)\\s+" + name);
- matcher = pattern.matcher(stty);
- if (!matcher.find()) {
- return null;
- }
- }
- }
- return matcher.group(1);
- }
-
- protected static int getProperty(String name, String stty) {
- String str = getPropertyAsString(name, stty);
- return str != null ? parseControlChar(str) : -1;
- }
-
- private static int parseControlChar(String str) {
- // under
- if ("<undef>".equals(str)) {
- return -1;
- }
- // octal
- if (str.charAt(0) == '0') {
- return Integer.parseInt(str, 8);
- }
- // decimal
- if (str.charAt(0) >= '1' && str.charAt(0) <= '9') {
- return Integer.parseInt(str, 10);
- }
- // control char
- if (str.charAt(0) == '^') {
- if (str.charAt(1) == '?') {
- return 127;
- } else {
- return str.charAt(1) - 64;
- }
- } else if (str.charAt(0) == 'M' && str.charAt(1) == '-') {
- if (str.charAt(2) == '^') {
- if (str.charAt(3) == '?') {
- return 127 + 128;
- } else {
- return str.charAt(3) - 64 + 128;
- }
- } else {
- return str.charAt(2) + 128;
- }
- } else {
- return str.charAt(0);
- }
- }
-
- private String stty(final String... args) throws IOException, InterruptedException {
- String[] s = new String[args.length + 1];
- s[0] = sttyCommand;
- System.arraycopy(args, 0, s, 1, args.length);
- return exec(s);
- }
-
- private String exec(final String... cmd) throws IOException, InterruptedException {
- checkNotNull(cmd);
-
- Log.trace("Running: ", cmd);
-
- Process p = null;
- if (useRedirect) {
- try {
- p = inheritInput(new ProcessBuilder(cmd)).start();
- } catch (Throwable t) {
- useRedirect = false;
- }
- }
- if (p == null) {
- StringBuilder sb = new StringBuilder();
- for (int i = 0; i < cmd.length; i++) {
- if (i > 0) {
- sb.append(' ');
- }
- sb.append(cmd[i]);
- }
- sb.append(" < ");
- sb.append(ttyDevice);
- p = new ProcessBuilder(shCommand, "-c", sb.toString()).start();
- }
-
- String result = waitAndCapture(p);
-
- Log.trace("Result: ", result);
-
- return result;
- }
-
- private static ProcessBuilder inheritInput(ProcessBuilder pb) throws Exception {
- REDIRECT_INPUT_METHOD.invoke(pb, REDIRECT_INHERIT);
- return pb;
- }
-
- public static String waitAndCapture(Process p) throws IOException, InterruptedException {
- ByteArrayOutputStream bout = new ByteArrayOutputStream();
- InputStream in = null;
- InputStream err = null;
- OutputStream out = null;
- try {
- int c;
- in = p.getInputStream();
- while ((c = in.read()) != -1) {
- bout.write(c);
- }
- err = p.getErrorStream();
- while ((c = err.read()) != -1) {
- bout.write(c);
- }
- out = p.getOutputStream();
- p.waitFor();
- }
- finally {
- close(in, out, err);
- }
-
- return bout.toString();
- }
-
- private static void close(final Closeable... closeables) {
- for (Closeable c : closeables) {
- if (c != null) {
- try {
- c.close();
- } catch (Exception e) {
- // Ignore
- }
- }
- }
- }
-}
-