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https://github.com/ostreedev/ostree.git
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49de180191
changing only a byte may not generate a corrupted file, so play very safe and change 10 bytes. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
98 lines
3.4 KiB
JavaScript
98 lines
3.4 KiB
JavaScript
#!/usr/bin/env gjs
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//
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// Copyright (C) 2014 Colin Walters <walters@verbum.org>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the
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// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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const GLib = imports.gi.GLib;
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const Gio = imports.gi.Gio;
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const OSTree = imports.gi.OSTree;
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let repoPathArg = ARGV[0];
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let refToCorrupt = ARGV[1];
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let repo = OSTree.Repo.new(Gio.File.new_for_path(repoPathArg));
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repo.open(null);
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function listObjectChecksumsRecurse(dir, allObjects) {
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dir.ensure_resolved();
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allObjects[dir.tree_get_contents_checksum() + '.dirtree'] = true;
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allObjects[dir.get_checksum() + '.dirmeta'] = true;
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let e = dir.enumerate_children('standard::name,standard::type', 0, null);
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let info;
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while ((info = e.next_file(null)) != null) {
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let child = e.get_child(info);
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child.ensure_resolved();
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print(info.get_name() + " is " + info.get_file_type());
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if (info.get_file_type() == Gio.FileType.DIRECTORY) {
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listObjectChecksumsRecurse(child, allObjects);
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} else {
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allObjects[child.get_checksum() + '.filez'] = true;
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}
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}
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e.close(null);
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}
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let [,commit] = repo.resolve_rev(refToCorrupt, false);
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let [,root,commit] = repo.read_commit(refToCorrupt, null);
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let allObjects = {};
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allObjects[commit + '.commit'] = true;
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listObjectChecksumsRecurse(root, allObjects);
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let i = 0;
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for (let v in allObjects)
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i++;
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print("commit " + commit + " refers to " + i + " objects");
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let offset = GLib.random_int_range(0, i);
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let objectToCorrupt = null;
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for (let v in allObjects) {
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if (offset <= 0) {
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objectToCorrupt = v;
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break;
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}
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offset--;
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}
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print("Choosing " + objectToCorrupt + " to corrupt");
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let loosePath = repo.get_path().resolve_relative_path('objects/' + objectToCorrupt.substring(0, 2) + "/" + objectToCorrupt.substring(2));
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let iostream = loosePath.open_readwrite(null);
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let info = iostream.query_info('standard::size', null);
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let size = info.get_size();
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let datain = Gio.DataInputStream.new(iostream.get_input_stream());
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let dataout = Gio.DataOutputStream.new(iostream.get_output_stream());
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let bytesToChange = 10;
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let status = "";
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var bytesChanged = {}
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for (i = 0; i < bytesToChange; i++) {
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let byteOffsetToCorrupt;
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do {
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byteOffsetToCorrupt = GLib.random_int_range(0, size);
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} while (byteOffsetToCorrupt in bytesChanged);
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iostream.seek(byteOffsetToCorrupt, GLib.SeekType.SET, null);
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let inbyte = datain.read_byte(null);
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let outbyte = (inbyte + 1) % 255;
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dataout.put_byte(outbyte, null);
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bytesChanged[byteOffsetToCorrupt] = byteOffsetToCorrupt;
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status += "Changed byte offset " + byteOffsetToCorrupt + " from " + inbyte + " to " + outbyte + "\n";
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}
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dataout.flush(null);
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iostream.close(null);
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print(status);
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let successFile = Gio.File.new_for_path('corrupted-status.txt');
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successFile.replace_contents(status, null, false, 0, null);
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