sceIoDread strange behavior...

[victorprosa]

Hello everyone, it's me, again...

I've been working with IO functions for a while, but this is the first time i have to use directory listing...
After a lot of effort, I managed to get the function working, but it's returning an strange behavior...


For testing proposes i've just implemented a count function, but it always gave me an strange result:

real number of directories/files + 3

Then, i decided to print the damn results, and the information was a little bit strange:

(NULL)
.
..
(after the above, the listing goes fine)

What may be going on?

[NoEffex]

Hello everyone, it's me, again...

I've been working with IO functions for a while, but this is the first time i have to use directory listing...
After a lot of effort, I managed to get the function working, but it's returning an strange behavior...


For testing proposes i've just implemented a count function, but it always gave me an strange result:

real number of directories/files + 3

Then, i decided to print the damn results, and the information was a little bit strange:

(NULL)
.
..
(after the above, the listing goes fine)

What may be going on?

NULL is something, not sure.

. is current working directory

.. is top directory (One above)

[victorprosa]

NULL is something, not sure.

. is current working directory

.. is top directory (One above)

Yeah, i know, but the documentation doesn't help in this case:

Returns:
Read status

* 0 - No more directory entries left
* > 0 - More directory entired to go
* < 0 - Error

It don't tell what does the NULL mean, and why it is giving me the ".", the ".." is understandable, but it shouldn't be there, as soon as the command should be a directory listing, the ".." should be implemented by a further file explorer...

[unsigned int]

The "." and ".." results are normal behaviour (compare readdir()). The NULL result looks strange, might this be an error in your code?

This works for me:

Code: Select all

  pspDebugScreenInit();

  SceUID id = sceIoDopen("ms0:/psp");
  SceIoDirent entry;
  while (sceIoDread(id, &entry) > 0)
  {
    pspDebugScreenPrintf("'%s'\n", entry.d_name);
  }
  sceIoDclose(id);

produces

Code: Select all

'.'
'..'
'COMMON'
'GAME'
'GAME150'
'RSSCH'
'SAVEDATA'
'SYSTEM'
'THEME'
'RADIOPLAYER'

[victorprosa]

Well, I discovered that for a strange reason, only MP_ROOT, the folder where i was testing this stuff gives the NULL, LOL


Anyway, I use a similar code, but mine has to be FAR way bigger...

I am using VLF, then, the printf trick doesn't work, my code is a giant, with a lot of if(done > 0) {//do it again}
Hate these kind of dificulties of VLF, but it is so beautiful *.*


If you have any idea to shorten the code, it is apreciated, anyway, thanks for your help.... =]

[jimparis]

The root of a FAT filesystem can have an entry for the volume label. Maybe sceIoDread is catching that.

Be careful to zero the SceIoDirent before passing it to sceIoDopen. If you use the newlib wrappers, they take care of this.