C/C++ Programming Help Thread

[JaSo PsP]

what is the function to erase the entire nand. no i am not making a bricker (pointless becasue of pandoras battery) my brother cracked his lcd screen and the whole right side doesnt work. Instead of buying a new psp he is waiting for the psp slim. so i just want to try the pandora battery method myself by bricking his psp then recovering it. I also want to see if the psp can recover from a 100% corrupt or missing flash. if you feel its not a good idea to post the function on the forum, please pm me it

sceNandEraseAllBlock();

???

pspnand_driver.h as a header... Youd need to make it a kernel app etc...

[vodkkaa]

lol i just found it in pspnand_driver.h. thanks though

[myschoo]

vodkkaa: my mate formated flash0 and then recovered, so it should work

[MaTiAz]

vodkkaa: my mate formated flash0 and then recovered, so it should work

vodkkaa is erasing the whole flash, it'll destroy idstorage, flash0/1/2/3 etc.

[hallo007]

and pandora WONT recover it , so pointless to test , hold the psp for tests with idstorage , much more needed

[myschoo]

so where is stored idstorage? if u format flash0 and then still recover

[hallo007]

on the nand , idstorage.prx is a librarie

[Archaemic]

:facepalm: idstorage.prx is a library in flash0 that manipulates the idstorage. It isn't the idstorage itself.

[Auraomega]

:facepalm: idstorage.prx is a library in flash0 that manipulates the idstorage. It isn't the idstorage itself.

If thats so, where is idstorage actually stored, I'm guessing its not hardcoded into the hardware, else it wouldn't be damagable, right? And what are the exact ill effects of removing it?

I've never really understood that much about idstorage, I guess now is the time to learn :)

-Aura

[hallo007]

:facepalm: idstorage.prx is a library in flash0 that manipulates the idstorage. It isn't the idstorage itself.

Thats just the same I said

he said format flash0 => doesnt do anything to flash0
so i said it's on the nand , idstorage.prx (I guess that is the thing why he thought it was on flash0) is a library....

[Archaemic]

NAND is a kind of flash memory, by the way, and at that, the kind that the PSP uses. Saying it's on the NAND and on the flash memory mean the same thing. It's just not one of the flashx folders.

[hallo007]

flash0 is a partation on the nand (or how you say it in englisch)

[Archaemic]

Partition. And yes, that's exactly what flash0 is.

[Auraomega]

So, where exactly is idstorage? I'm assuming by what was said that its in a partition of the nand, but we know its not going to be in flash0-3... I'm confused...

And another question, how do I check the content of a directory, and display everything in it, sort of like iRShell or PSP Filer... I've taken a look at various peices of source code, but just got overwhelmed (I'm not good at reading big peices of source code from other people). I've noticed that there appears to be nothing in the pspiomanager.h file that can help.

-Aura

[Archaemic]

Um, sceIoDopen, sceIoDread and sceIoDclose.

[Auraomega]

Um, sceIoDopen, sceIoDread and sceIoDclose.

Thats it? *Smashes head on table*

Do you have as simple an answer to the idstorage question?

-Aura

[_dysfunctional]

Umm, hold on. I have a sample some where...
-= Double Post =-
This is from something I was making, called dsxPlugin.

typedef struct
{
	char filename[256];
	int id;
} dsxFile;

typedef struct
{ 
	int numFiles;
	dsxFile* files;
} dsxFilebrowser;

dsxFilebrowser _dsxFilebrowser;
char _dsxPluginBrowserPath[256] = "ms0:";

int dsxPluginBrowserSet(const char* path)
{
	strncpy(_dsxPluginBrowserPath, path, 256);
	printf("New browser path:\n\t%s\n", _dsxPluginBrowserPath);
	
	return 1;
}

int dsxPluginBrowserBuild()
{
	
	/**
	 * Define our dirent.
	 * dirent holds the current
	 * file info. As we need our
	 * dirent to act as a point, 
	 * memset it before use.
	 */
	SceIoDirent dirent;
	memset(&dirent, 0, sizeof(SceIoDirent));
	
	SceUID dirId = sceIoDopen(_dsxPluginBrowserPath);
	if(dirId < 0)
	{	
		//* Error check
		printf("Error: Unable to open directory \"%s\". SONY ERROR CODE: %X\n", _dsxPluginBrowserPath, dirId);
		dsxPluginBrowserSet("ms0:");
		dsxPluginBrowserBuild();
	}
	
	/**
	 * Get file count.
	 * sceIoDread return > 0 when
	 * there are still files to 
	 * be read in the said directory.
	 */
	int fileCount = 0;
	while(sceIoDread(dirId, &dirent) > 0)
	{
		fileCount++;
	}
	
	/**
	 * Close and reopen the file.
	 * There is no rewind function 
	 * in the sceIo* lib, so we 
	 * do it the manual way.
	 */
	sceIoDclose(dirId);
	dirId = sceIoDopen(_dsxPluginBrowserPath);
	if(dirId < 0)
	{	
		//* Error check
		printf("Error: Unable to open directory \"%s\". SONY ERROR CODE: %X\n", _dsxPluginBrowserPath, dirId);
		dsxPluginBrowserSet("ms0:");
		dsxPluginBrowserBuild();
	}
	
	/**
	 * Free any files that 
	 * are left.
	 */
	if(_dsxFilebrowser.files)
	{
		free(_dsxFilebrowser.files);
		_dsxFilebrowser.files = NULL;
	}
	
	/**
	 * Malloc enough data to
	 * hold enough files for the 
	 * current directory.
	 */
	_dsxFilebrowser.files = (dsxFile*) malloc(sizeof(dsxFile) * fileCount);
	
	int i, err;
	for(i = 0; i < fileCount; i++)
	{
		err = sceIoDread(dirId, &dirent);
		if(err < 0)
		{
			printf("Unable to read file.\n");
			return 0;
		}

		/**
		 * Get filename and file id.
		 */
		strncpy(_dsxFilebrowser.files[i].filename, dirent.d_name, 256);
		_dsxFilebrowser.files[i].id = i;
	}
	
	_dsxFilebrowser.numFiles = fileCount;
	
	sceIoDclose(dirId);
	return 1;
}

int dsxPluginBrowserDump(const char* path)
{
	FILE* pFile = fopen(path, "a");
	if(!pFile)
	{
		printf("Error: Unable to open file, \"%s\"\n", path);
		return 0;
	}
	
	int i;
	for(i = 0; i < _dsxFilebrowser.numFiles; i++)
	{
		fprintf(pFile, "File ID: %d\n\t%s\n\n", _dsxFilebrowser.files[i].id, _dsxFilebrowser.files[i].filename);
	}
	
	fclose(pFile);
	return 1;
}

I didn't finish it because I didn't think anyone would use it, but still, it shows how it works. Or, at least, how I would do it.

[Auraomega]

Thanks, that should come in handy.

-Aura

Ok, I've got it all working well, except how to go down the directories, as in going from ms0:/PSP/GAME to ms0:/PSP, when using the .. option. Is there some sort of easy way of doing this, or do I have to do this manually?

Also, whats the . signify? I always thought that ./ was the same directory?

[hallo007]

. is the root

and just write some function to let the user press 0 to go a folder up

[Archaemic]

hallo is wrong again. . is the same folder. It's just there because it's part of various standards.

[coolguy5678]

"." and "./" mean the same thing, unless there's a subtle difference that I'm unaware of.

[eldiablov]

Really quick question here.

When would you use int main(int argc, char* argv[]) instead of just int main() ?

[Archaemic]

If you want to accept command line arguments. On the PSP, that really only happens if it's an iR Shell plugin.

[_dysfunctional]

. is the root

and just write some function to let the user press 0 to go a folder up

Please, stop answering questions. :/

. and ./ mean the same thing. The difference is that . is a directory, so you can't append a file to it.

.someotherfolder/

Would represent a folder named '.someotherfolder'.

./someotherfolder/

Would represent a folder named 'someotherfolder' in the current directory.

[Moca]

If you want to accept command line arguments. On the PSP, that really only happens if it's an iR Shell plugin.

I've never felt the need for it, nor was I ever interested in using it, but can't you use

pspSdkLoadStartModuleWithArgs(const char *filename, int mpid, int argc, char * const argv[]);

I remember I saw it a while back but never got around to using it.

[_dysfunctional]

Yes, and the argc and argv are passed to the main function, telling the plugin what to do.

[Auraomega]

How do I go down a directory? I've tried making a manual way, but I keep crashing or ending up in the root oddly.

Also, how do I check file extentions? So as to load a .PBP when its selected.

Thanks
-Aura

[Archaemic]

strrchr will be your friend in both cases.

[Moca]

Also, how do I check file extentions? So as to load a .PBP when its selected.

Thanks
-Aura

Well, there's a few approaches to doing that. You could:

void load_file(char* file)
{
    int x = 0;
    char temp[5];
    int namelen = strlen(file);
    file += (namelen-4);
    if(strcmp(file,".pbp")==0)
    {
        file -= (namelen-4);
        /*Load eboot*/;
    }
}

Thats one way to do it. Also, you would need to create a menu to select the items. Shouldn't take much space for the entire code.

[Archaemic]

Why modify file?

void load_file(const char *file)
{
    int namelen = strlen(file)
    if(strcasecmp(file+namelen-4,".pbp")==0)
    {
        /*Load eboot*/;
    }
}