[Interest] QStorageInfo bug?

[Alexander Dyagilev]

OK, it seems the things are a bit more clear now.

1. External drive. Some file on it.

QStorageInfo(pathToFile).rootPath() returns a valid path. I save it for 
the further usage (SRP).

2. Disconnect the drive, restart app.

QStorageInfo(SRP).isValid() returns false. (as expected)

3. Connect the drive.

QStorageInfo(SRP).isValid() starts returning true, but it's rootPath() 
method starts returning "/" instead of SRP value!

I.e. it starts pointing to a system root drive! After the few seconds 
QStorageInfo(SRP) starts pointing again to that external drive because 
its rootPath() method starts returning SRP value.

Looks like a bug.



On 7/19/2017 10:51 AM, Alexander Dyagilev wrote:
>
> Hello,
>
> |Mac OS X El Capitan 10.11.6|.
>
> I have an external drive. In my app, I monitor for it to be connected 
> to PC. I use |QStorageInfo| for this providing it with the drive's 
> root path.
>
> On that drive I have a file with a known path to it. I need to check 
> if the file exists once the drive is connected.
>
> The problem is that once I connect the drive, |QStorageInfo| starts to 
> return |true| for both |isValid| and |isReady|, but |QFile::exists| 
> returns |false| while the file is really exists on the drive. It keeps 
> returning |false| for a few seconds. After that seconds it starts 
> returning |true|.
>
> Is it a bug in Qt/MAC or am I missing something?
>
> Qt 5.9.1.
>
> P.S. It works fine on Windows 10.
>
> Code Example.
>
> |QStorageInfos(storageRootPath);if(s.isValid()&&s.isReady()){autoexists 
> =QFile::exists(pathToFile);// getting false here for a few seconds}|

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