/** @return matching bloc B bloc -> A bloc */
public static Map<Integer, Integer> diff(FileDesc a, FileDesc b) {
Map<Integer, List<IndexedHash>> blocA = new HashMap<Integer, List<IndexedHash>>();
int i = 0;
for (Bloc bloc : a.blocs) {
List<IndexedHash> l = blocA.get(bloc.roll);
if (l == null) {
l = new ArrayList<IndexedHash>();
blocA.put(bloc.roll, l);
}
l.add(new IndexedHash(i++, bloc.hash));
}
Map<Integer, Integer> map = new HashMap<Integer, Integer>();
loop:
for (i = 0; i < b.blocs.length; i++) {
Bloc blocB = b.blocs[i];
List<IndexedHash> list = blocA.get(blocB.roll);
if (list != null) {
for (IndexedHash bloc : list) {
if (blocB.hash.equals(bloc.h)) {
map.put(i, bloc.i);
continue loop;
}
}
}
}
return map;
}
public static FileDesc loadFile(Path root, Path file, int blocSize)
throws NoSuchAlgorithmException, FileNotFoundException, IOException {
MessageDigest md = MessageDigest.getInstance("SHA-512");
MessageDigest fileMd = MessageDigest.getInstance("SHA-512");
FileDesc desc = new FileDesc(file.toString(), null, null);
List<Bloc> list = new ArrayList<Bloc>();
try (FileInputStream fis = new FileInputStream(root.resolve(file).toString())) {
byte[] buf = new byte[blocSize];
byte[] h;
int s;
while ((s = fis.read(buf)) != -1) {
int c;
while (s < buf.length && (c = fis.read()) != -1) buf[s++] = (byte) c;
fileMd.update(buf, 0, s);
// padding
byte p = 0;
while (s < buf.length) buf[s++] = ++p;
h = md.digest(buf);
Bloc bloc = new Bloc(RollingChecksum.compute(buf), new Hash(h));
list.add(bloc);
}
h = fileMd.digest();
desc.fileHash = new Hash(h);
desc.blocs = list.toArray(new Bloc[0]);
}
return desc;
}
private static void addUrl(List<URL> urls, String url) {
try {
urls.add(new URL(url));
} catch (MalformedURLException e) {
// We simply ignore malformed URL
}
}
@Override
public void setAcl(List<AclEntry> acl) throws IOException {
// permission check
checkAccess(file, false, true);
// open file (will fail if file is a link and not following links)
int fd = file.openForAttributeAccess(followLinks);
try {
// SECURITY: need to copy list as can change during processing
acl = new ArrayList<AclEntry>(acl);
int n = acl.size();
long address = unsafe.allocateMemory(SIZEOF_ACE_T * n);
try {
encode(acl, address);
facl(fd, ACE_SETACL, n, address);
} catch (UnixException x) {
if ((x.errno() == ENOSYS) || !isAclsEnabled(fd)) {
throw new FileSystemException(
file.getPathForExceptionMessage(),
null,
x.getMessage() + " (file system does not support NFSv4 ACLs)");
}
if (x.errno() == EINVAL && (n < 3))
throw new IOException("ACL must contain at least 3 entries");
x.rethrowAsIOException(file);
} finally {
unsafe.freeMemory(address);
}
} finally {
close(fd);
}
}
/** check a candidate plugin for jar hell before installing it */
private void jarHellCheck(Path candidate, boolean isolated) throws IOException {
// create list of current jars in classpath
final List<URL> jars = new ArrayList<>(Arrays.asList(JarHell.parseClassPath()));
// read existing bundles. this does some checks on the installation too.
List<Bundle> bundles = PluginsService.getPluginBundles(environment.pluginsFile());
// if we aren't isolated, we need to jarhellcheck against any other non-isolated plugins
// thats always the first bundle
if (isolated == false) {
jars.addAll(bundles.get(0).urls);
}
// add plugin jars to the list
Path pluginJars[] = FileSystemUtils.files(candidate, "*.jar");
for (Path jar : pluginJars) {
jars.add(jar.toUri().toURL());
}
// check combined (current classpath + new jars to-be-added)
try {
JarHell.checkJarHell(jars.toArray(new URL[jars.size()]));
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}