vfs 0.0.1-alpha

vfs: ^0.0.1-alpha copied to clipboard

example/vfs_example.dart

import 'dart:convert';
import 'dart:typed_data';

import 'package:vfs/vfs.dart';

void main() {
  final vfs = MemoryVFS(stdin: utf8.encode('input'));
  vfs.mountPreopen(fd: 3, guestPath: '/workspace');

  vfs.directory('/workspace').create();
  vfs.file('/workspace/hello.txt').write(utf8.encode('hello'));

  final fileFd = vfs.pathOpen(3, 'hello.txt', mode: VFSOpenMode.readWrite);
  final prefix = Uint8List(5);
  vfs.read(fileFd, prefix);
  print('read: ${utf8.decode(prefix)}');

  vfs.seek(fileFd, 0, whence: VFSWhence.end);
  vfs.write(fileFd, utf8.encode(' world'));
  vfs.close(fileFd);

  print('file: ${utf8.decode(vfs.file('/workspace/hello.txt').read())}');
  print('prestat: ${vfs.fdPrestatDirName(3)}');
  print('stat type: ${vfs.pathFilestatGet(3, 'hello.txt').type}');

  final stdinBuffer = Uint8List(8);
  final stdinCount = vfs.read(stdinFileDescriptor, stdinBuffer);
  print('stdin: ${utf8.decode(stdinBuffer.sublist(0, stdinCount))}');

  vfs.write(stdoutFileDescriptor, utf8.encode('captured stdout'));
  print('stdout bytes: ${utf8.decode(vfs.stdoutBytes)}');
}