-
Notifications
You must be signed in to change notification settings - Fork 140
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Browse files
Browse the repository at this point in the history
- Loading branch information
Showing
3 changed files
with
188 additions
and
10 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
137 changes: 137 additions & 0 deletions
137
src/main/java/org/fusesource/jansi/internal/MingwSupport.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,137 @@ | ||
| /* | ||
| * Copyright (C) 2009-2023 the original author(s). | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.fusesource.jansi.internal; | ||
|
|
||
| import java.io.ByteArrayOutputStream; | ||
| import java.io.File; | ||
| import java.io.FileDescriptor; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.lang.reflect.Constructor; | ||
| import java.lang.reflect.Field; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
|
|
||
| /** | ||
| * Support for MINGW terminals. | ||
| * Those terminals do not use the underlying windows terminal and there's no CLibrary available | ||
| * in these environments. We have to rely on calling {@code stty.exe} and {@code tty.exe} to | ||
| * obtain the terminal name and width. | ||
| */ | ||
| public class MingwSupport { | ||
|
|
||
| private final String sttyCommand; | ||
| private final String ttyCommand; | ||
| private final Pattern columnsPatterns; | ||
|
|
||
| public MingwSupport() { | ||
| String tty = null; | ||
| String stty = null; | ||
| String path = System.getenv("PATH"); | ||
| if (path != null) { | ||
| String[] paths = path.split(File.pathSeparator); | ||
| for (String p : paths) { | ||
| File ttyFile = new File(p, "tty.exe"); | ||
| if (tty == null && ttyFile.canExecute()) { | ||
| tty = ttyFile.getAbsolutePath(); | ||
| } | ||
| File sttyFile = new File(p, "stty.exe"); | ||
| if (stty == null && sttyFile.canExecute()) { | ||
| stty = sttyFile.getAbsolutePath(); | ||
| } | ||
| } | ||
| } | ||
| if (tty == null) { | ||
| tty = "tty.exe"; | ||
| } | ||
| if (stty == null) { | ||
| stty = "stty.exe"; | ||
| } | ||
| ttyCommand = tty; | ||
| sttyCommand = stty; | ||
| // Compute patterns | ||
| columnsPatterns = Pattern.compile("\\b" + "columns" + "\\s+(\\d+)\\b"); | ||
| } | ||
|
|
||
| public String getConsoleName(boolean stdout) { | ||
| try { | ||
| Process p = new ProcessBuilder(ttyCommand) | ||
| .redirectInput(getRedirect(stdout ? FileDescriptor.out : FileDescriptor.err)) | ||
| .start(); | ||
| String result = waitAndCapture(p); | ||
| if (p.exitValue() == 0) { | ||
| return result.trim(); | ||
| } | ||
| } catch (Throwable t) { | ||
| if ("java.lang.reflect.InaccessibleObjectException" | ||
| .equals(t.getClass().getName())) { | ||
| System.err.println("MINGW support requires --add-opens java.base/java.lang=ALL-UNNAMED"); | ||
| } | ||
| // ignore | ||
| } | ||
| return null; | ||
| } | ||
|
|
||
| public int getTerminalWidth(String name) { | ||
| try { | ||
| Process p = new ProcessBuilder(sttyCommand, "-F", name, "-a").start(); | ||
| String result = waitAndCapture(p); | ||
| if (p.exitValue() != 0) { | ||
| throw new IOException("Error executing '" + sttyCommand + "': " + result); | ||
| } | ||
| Matcher matcher = columnsPatterns.matcher(result); | ||
| if (matcher.find()) { | ||
| return Integer.parseInt(matcher.group(1)); | ||
| } | ||
| throw new IOException("Unable to parse columns"); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
|
|
||
| private static String waitAndCapture(Process p) throws IOException, InterruptedException { | ||
| ByteArrayOutputStream bout = new ByteArrayOutputStream(); | ||
| try (InputStream in = p.getInputStream(); | ||
| InputStream err = p.getErrorStream()) { | ||
| int c; | ||
| while ((c = in.read()) != -1) { | ||
| bout.write(c); | ||
| } | ||
| while ((c = err.read()) != -1) { | ||
| bout.write(c); | ||
| } | ||
| p.waitFor(); | ||
| } | ||
| return bout.toString(); | ||
| } | ||
|
|
||
| /** | ||
| * This requires --add-opens java.base/java.lang=ALL-UNNAMED | ||
| */ | ||
| private ProcessBuilder.Redirect getRedirect(FileDescriptor fd) throws ReflectiveOperationException { | ||
| // This is not really allowed, but this is the only way to redirect the output or error stream | ||
| // to the input. This is definitely not something you'd usually want to do, but in the case of | ||
| // the `tty` utility, it provides a way to get | ||
| Class<?> rpi = Class.forName("java.lang.ProcessBuilder$RedirectPipeImpl"); | ||
| Constructor<?> cns = rpi.getDeclaredConstructor(); | ||
| cns.setAccessible(true); | ||
| ProcessBuilder.Redirect input = (ProcessBuilder.Redirect) cns.newInstance(); | ||
| Field f = rpi.getDeclaredField("fd"); | ||
| f.setAccessible(true); | ||
| f.set(input, fd); | ||
| return input; | ||
| } | ||
| } |