createDirectory function create that can not be deleted file. about libaums

[vlog-yamamoto]

When listFiles function do after the createDirectory, sometimes listFiles is not 0.

UsbFile currentUsbFile = getRootDirectory();

UsbFile usbFile = currentUsbFile.createDirectory(name);

UsbFile[] usbFiles = nextUsbFile.listFiles();
if (usbFiles != null && usbFiles.length > 0) {
        Timber.e("createDirectory: usbfile[%d]", usbFiles.length);
}

[magnusja]

Hey,

thanks for reporting. Currently I am pretty busy, thus I cannot say when I can have a look at this.

[vlog-yamamoto]

I tried the following in the Mac PC and Windows PC.

1. USB device attach to PC
2. USB device detach from PC use eject function.
3. USB device attach to Android
4. createDirectory function do.

When attach to Mac PC createDirectory function sometimes create that cannot be deleted.
But When attach to Windows PC createDirectory function did not create that cannot be deleted.

It might have occurred from usb storage mount to mac pc.

[vlog-yamamoto]

It is seem that FatDirectory class createDirectory function read dirty memory.

createDirectory function result.entries.size() is two. result.entries is "." and "..".
But sometime result.entries.size() over 2 after result.write().
write() is init() at first.

    private void init() throws IOException {
        if (chain == null) {
            chain = new ClusterChain(entry.getStartCluster(), blockDevice, fat, bootSector);
            readEntries();
        }
    }

Is is createDirectory function's "result" is chain = null, So readEntries do.
I thinkk that When readEntries read dirty memory, volume label Log or addEntry is happend.

[magnusja]

Should be fixed in current develop, please review and reopen this issue if not.

[vlog-yamamoto]

createDirectory function only do in root directory.

1.USB device attach to mac
2.USB device detach from mac use eject function.
3.USB device attach to Android
4.createDirectory function do in root directory (ex [root directory]/a)
5.USB device detach from Android
6.USB device attach to mac
7.ls command do.

The following problems are occurring often.

No.1 not find "." and ".." file.

$ ls -la /Volumes/USBSTORAGE/a/

No.2 create file.

$ ls -la /Volumes/USBSTORAGE/b/
ls: BF0541E4.-06: Input/output error
ls: E8DC␀␀␀␀.␀␀␀: No such file or directory

No.3 ".." time is error.

$ ls -la /Volumes/USBSTORAGE/h/ 
total 64
drwxrwxrwx  1 yamamoto  staff  16384  3 22 20:12 .
drwxrwxrwx@ 1 yamamoto  staff  16384  1  1  1970 ..

When createDirectory function do in not root directory , It seems not to occur
ex. [root directory]/a/b seems not to occur.
[root directory]/a is occur.

After createDirectory function do, It click createDirectory.
When show createDirectory, It seems not to occur No.1 and No2.

[magnusja]

Can you reproduce this behaviour with the example app included in the repository?

[vlog-yamamoto]

I use Usbfileman at developer brunch.
When only createDirectory do in root directory, problems are occurring often.

My application is copy file after createDirectory function.
It seems not to occur after #18.

[magnusja]

Okay I can reproduce No. 3 now.

For the others did you try a different Android device and did you ensure waiting enough time after detaching from the Android device (so data was actually written completely)?

[vlog-yamamoto]

I was testing with Nexus5.
When I change device to Nexus6, problems are occurring.

When I change UsbMassStorage, I can reproduce only No.3.
The cause of No.1 and No.2 may be USB storage.

[magnusja]

Okay I currently do not know why no. 3 is happening, but I will have a look asap.

Which of the flash drives is making problems? (iXpand Flash Drive 32GB or SanDisk Ultra USB 3.0 16GB?)

[vlog-yamamoto]

iXpand Flash Drive 32GB is making problems.