termux-app

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package com.termux.shared.file.filesystem;
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import android.system.ErrnoException;
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import android.system.Os;
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import java.io.File;
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import java.io.FileDescriptor;
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import java.io.IOException;
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public class NativeDispatcher {
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    public static void stat(String filePath, FileAttributes fileAttributes) throws IOException {
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        validateFileExistence(filePath);
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        try {
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            fileAttributes.loadFromStructStat(Os.stat(filePath));
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        } catch (ErrnoException e) {
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            throw new IOException("Failed to run Os.stat() on file at path \"" + filePath + "\": " + e.getMessage());
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        }
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    }
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    public static void lstat(String filePath, FileAttributes fileAttributes) throws IOException {
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        validateFileExistence(filePath);
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        try {
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            fileAttributes.loadFromStructStat(Os.lstat(filePath));
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        } catch (ErrnoException e) {
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            throw new IOException("Failed to run Os.lstat() on file at path \"" + filePath + "\": " + e.getMessage());
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        }
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    }
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    public static void fstat(FileDescriptor fileDescriptor, FileAttributes fileAttributes) throws IOException {
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        validateFileDescriptor(fileDescriptor);
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        try {
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            fileAttributes.loadFromStructStat(Os.fstat(fileDescriptor));
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        } catch (ErrnoException e) {
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            throw new IOException("Failed to run Os.fstat() on file descriptor \"" + fileDescriptor.toString() + "\": " + e.getMessage());
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        }
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    }
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    public static void validateFileExistence(String filePath) throws IOException {
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        if (filePath == null || filePath.isEmpty()) throw new IOException("The path is null or empty");
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        File file = new File(filePath);
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        //if (!file.exists())
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        //    throw new IOException("No such file or directory: \"" + filePath + "\"");
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    }
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    public static void validateFileDescriptor(FileDescriptor fileDescriptor) throws IOException {
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        if (fileDescriptor == null) throw new IOException("The file descriptor is null");
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        if (!fileDescriptor.valid())
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            throw new IOException("No such file descriptor: \"" + fileDescriptor.toString() + "\"");
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    }
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}
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