File copy from Assets dir not working

kanaida

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• Dec 12, 2011

• #1

Steps to reproduce:

Create a new project
Add a file on the right pane, any file.

'This returns True:
File.Exists(File.DirAssets,"YourFileName")

'This fails
File.Copy(File.DirAssets,"YourFileName",File.DirExternal,"YourFileName")

Says something like:
/sdcard/YourFileName File Not found (strangely returning the target filename and not the source filename)

All i'm trying to do is copy a native linux executable to a temp dir where I can give it execution rights, then run it as a shell command. My command works fine if i do all of this from the shell manually.

 

vb1992

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• Dec 12, 2011

• #2

kanaida said:

'This fails
File.Copy(File.DirAssets,"YourFileName",File.DirExternal,"YourFileName")

Click to expand...

What does

msgbox(File.DirExternal, "File.DirExternal") return?

 

kanaida

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• Dec 12, 2011

• #3

I think /sdcard/

however, even if I manually type a path I know to exist, same problem.

My actual path is /sdcard/tmproot wich I've actually created myself by hand in advance.

 

vb1992

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• Dec 12, 2011

• #4

try: File.DirDefaultExternal

 

vb1992

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• Dec 12, 2011

• #5

Or test this out, if it works, then add your file to it,
and replace the file-name, and test again

 

Attachments

• SimpleFileCopy.zip

  23.6 KB · Views: 558

vb1992

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• Dec 12, 2011

• #6

also see:

http://www.b4x.com/forum/basic4andr...ials/7892-file-path-dir-folder.html#post59636

 

rbsoft

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• Dec 12, 2011

• #7

B4X:

File.Copy(File.DirAssets,"YourFileName",File.DirEx ternal,"YourFileName")

Remove the blank in File.DirEx ternal. Should be

B4X:

File.Copy(File.DirAssets,"YourFileName",File.DirExternal,"YourFileName")

Rolf

 

kanaida

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• Dec 12, 2011

• #8

rbsoft said:

B4X:

File.Copy(File.DirAssets,"YourFileName",File.DirEx ternal,"YourFileName")

Remove the blank in File.DirEx ternal. Should be

B4X:

File.Copy(File.DirAssets,"YourFileName",File.DirExternal,"YourFileName")

Rolf

Click to expand...

lol... wish it was that, if this was the case it wouldn't compile I'm gonna try DirExternal and see what happens.

 

klaus

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• Dec 12, 2011

• #9

Is your device connected to the PC via USB and this blocks the access to the sdcard ?

Best regards.

 

kanaida

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• Dec 12, 2011

• #10

hmmm... File.DirInternal worked. I guess that will do.

Sdcard was an internal memory partition, it's fine though. I just needed a file to execute from an ext filesystem. Thanks guys

 

kanaida

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• Dec 12, 2011

• #11

Something else is kinda funny.

Using root explorer, I can create files without any special root access in :
/data/local/tmp/

However, if I execute say:
cp /data/data/kanaida.myapp/files/MyFile /data/local/tmp I get access denied? Is there anything special about permissions that android apps get on the filesystem itself? strangely, I can access this folder with adb shell and push files into it.

 

kanaida

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• Dec 13, 2011

• #12

After reading a little bit more about android permissions, is there any way I can give myself elevated filesystem and process execution rights somehow?

I have a suspicion this is what it could be.

The reason for all of this is because I'm converting an ADB script that roots a phone, into a single APK file (that won't be on the market for obvious reasons) but will make life a whole lot easier for the people who install my paid app wich requires root priviliges, not to mention reduce the chance of them doing something incorrectly themselves.