aQute.lib.io.Other Maven / Gradle / Ivy

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A main program (executable JAR) that will listen to port 29998. At first, it can only answer that it is an Envoy (a limited agent). The only function it supports is installing a -runpath. It will then create a framework + agent and transfer the connection to the just installed agent who will then install the bundles. This JAR is a main command for JPM called bndremote. In JPM, it will start up with debug enabled. This JAR does some highly complicated class loading wizardy to ensure that it does not enforce any constraints on the -runpath.

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package aQute.lib.io;

import java.io.File;
import java.io.IOException;
import java.nio.file.Path;

import aQute.lib.io.IO.OS;
import aQute.lib.stringrover.StringRover;

class Other implements OS {

	@Override
	public File getBasedFile(File base, String subPath) throws IOException {
		String use;
		if (subPath.contains("..")) {
			Path normalizedPath = Path.of(subPath)
				.normalize();
			if (normalizedPath.getNameCount() > 0 && normalizedPath.getName(0)
				.equals(IO.DOTDOT)) {
				throw new IOException("io.sub.up invalid path, will escape the designated directory. path='" + subPath
					+ "', base='" + base + "', normalized='" + normalizedPath + "'");
			}
			use = normalizedPath.toString();
		} else
			use = subPath;
		return new File(base, use);
	}

	@Override
	public String getenv(String string) {
		return System.getenv(string);
	}

	@Override
	public String toSafeFileName(String string) {
		StringBuilder sb = new StringBuilder();

		for (int i = 0; i < string.length(); i++) {
			char c = string.charAt(i);
			if (c < ' ')
				continue;

			sb.append(switch (c) {
				case '/', ':' -> '%';
				default -> c;
			});
		}
		return sb.toString();
	}

	@Override
	public File getFile(File base, String file) {
		return getFile0(base, file);
	}

	static File getFile0(File base, String path) {
		StringRover rover = new StringRover(path);
		if (rover.startsWith("~/")) {
			rover.increment(2);
			if (!rover.startsWith("~/")) {
				return getFile0(IO.home, rover.substring(0));
			}
		}
		if (rover.startsWith("~")) {
			return getFile0(IO.home.getParentFile(), rover.substring(1));
		}

		File f = new File(rover.substring(0));
		if (f.isAbsolute()) {
			return f;
		}

		if (base == null) {
			base = IO.work;
		}

		for (f = base.getAbsoluteFile(); !rover.isEmpty();) {
			int n = rover.indexOf('/');
			if (n < 0) {
				n = rover.length();
			}
			if ((n == 0) || ((n == 1) && (rover.charAt(0) == '.'))) {
				// case "" or "."
			} else if ((n == 2) && (rover.charAt(0) == '.') && (rover.charAt(1) == '.')) {
				// case ".."
				File parent = f.getParentFile();
				if (parent != null) {
					f = parent;
				}
			} else {
				String segment = rover.substring(0, n);
				f = new File(f, segment);
			}
			rover.increment(n + 1);
		}

		return f.getAbsoluteFile();
	}

}