@Override
public void setTimes(FileTime lastModifiedTime, FileTime lastAccessTime, FileTime createTime)
throws IOException {
// null => don't change
if (lastModifiedTime == null && lastAccessTime == null) {
// no effect
return;
}
// permission check
file.checkWrite();
int fd = file.openForAttributeAccess(followLinks);
try {
// if not changing both attributes then need existing attributes
if (lastModifiedTime == null || lastAccessTime == null) {
try {
UnixFileAttributes attrs = UnixFileAttributes.get(fd);
if (lastModifiedTime == null) lastModifiedTime = attrs.lastModifiedTime();
if (lastAccessTime == null) lastAccessTime = attrs.lastAccessTime();
} catch (UnixException x) {
x.rethrowAsIOException(file);
}
}
// uptime times
long modValue = lastModifiedTime.to(TimeUnit.MICROSECONDS);
long accessValue = lastAccessTime.to(TimeUnit.MICROSECONDS);
boolean retry = false;
try {
futimes(fd, accessValue, modValue);
} catch (UnixException x) {
// if futimes fails with EINVAL and one/both of the times is
// negative then we adjust the value to the epoch and retry.
if (x.errno() == UnixConstants.EINVAL && (modValue < 0L || accessValue < 0L)) {
retry = true;
} else {
x.rethrowAsIOException(file);
}
}
if (retry) {
if (modValue < 0L) modValue = 0L;
if (accessValue < 0L) accessValue = 0L;
try {
futimes(fd, accessValue, modValue);
} catch (UnixException x) {
x.rethrowAsIOException(file);
}
}
} finally {
close(fd);
}
}
@Override
public BasicFileAttributes readAttributes() throws IOException {
file.checkRead();
try {
UnixFileAttributes attrs = UnixFileAttributes.get(file, followLinks);
return attrs.asBasicFileAttributes();
} catch (UnixException x) {
x.rethrowAsIOException(file);
return null; // keep compiler happy
}
}
@Override
public UserPrincipal getOwner() throws IOException {
checkAccess(file, true, false);
try {
UnixFileAttributes attrs = UnixFileAttributes.get(file, followLinks);
return UnixUserPrincipals.fromUid(attrs.uid());
} catch (UnixException x) {
x.rethrowAsIOException(file);
return null; // keep compile happy
}
}
@Override
public Map<String, Object> readAttributes(String[] requested) throws IOException {
AttributesBuilder builder = AttributesBuilder.create(unixAttributeNames, requested);
UnixFileAttributes attrs = readAttributes();
addRequestedPosixAttributes(attrs, builder);
if (builder.match(MODE_NAME)) builder.add(MODE_NAME, attrs.mode());
if (builder.match(INO_NAME)) builder.add(INO_NAME, attrs.ino());
if (builder.match(DEV_NAME)) builder.add(DEV_NAME, attrs.dev());
if (builder.match(RDEV_NAME)) builder.add(RDEV_NAME, attrs.rdev());
if (builder.match(NLINK_NAME)) builder.add(NLINK_NAME, attrs.nlink());
if (builder.match(UID_NAME)) builder.add(UID_NAME, attrs.uid());
if (builder.match(GID_NAME)) builder.add(GID_NAME, attrs.gid());
if (builder.match(CTIME_NAME)) builder.add(CTIME_NAME, attrs.ctime());
return builder.unmodifiableMap();
}
@Override
public UnixFileAttributes readAttributes() throws IOException {
checkReadExtended();
try {
return UnixFileAttributes.get(file, followLinks);
} catch (UnixException x) {
x.rethrowAsIOException(file);
return null; // keep compiler happy
}
}
