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Updated Application To Rename vs Delete #1

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Updated Application To Rename vs Delete #1

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10 changes: 5 additions & 5 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -21,16 +21,16 @@ You need a Vita running HENkaku to be able to use CardUnlock. Install the vpk in
## How to use it

* start Vita without the card inserted
* run HENkaku and start CardUnlock
* insert card, answer "no" to "do you want to reboot now" message
* press X to remove id.dat
* run HENkaku and start CardUnlock
* insert the memory card, answer "no" to the "do you want to reboot now" message from the system
* press X to rename id.dat
* press X to reboot or O to exit (after pressing O you can remove the card to insert in another device)
* answer "no" to questions about copying content to the card
* answer "no" to questions about copying content to the card from the system
* you now have access to the card

## How does it work?

The Vita looks at the file id.dat in the root of the card to see if it's attached to another user/version when mounting the card. Removing this file makes the Vita think this is a new card allowing you to mount it. The problem is that you need to mount the card to remove the file and mounting ux0: causes the Vita to check the file before you can delete it. CardUnlock gets around this by mounting the card as xmc0: which is the actual mount point for external cards. The Vita doesn't check for id.dat when you mount xmc0: so we can mount the device and delete id.dat.
The Vita looks at the file id.dat in the root of the card to see if it's attached to another user/version when mounting the card. Removing/renaming this file makes the Vita think this is a new card allowing you to mount it. The problem is that you need to mount the card to access the file and mounting ux0: causes the Vita to check the file before you can delete it. CardUnlock gets around this by mounting the card as xmc0: which is the actual mount point for external cards. The Vita doesn't check for id.dat when you mount xmc0: so we can mount the device and rename id.dat.

## Credits

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42 changes: 33 additions & 9 deletions main.c
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Expand Up @@ -34,14 +34,22 @@ int main(int argc, char *argv[])
psvDebugScreenInit();

psvDebugScreenSetFgColor(COLOR_WHITE);
printf("CardUnlock by cnsldv\n");
printf("====================\n");
printf("CardUnlock v1.1 by cnsldv (Contributions By Hexxellor)\n");
printf("======================================================\n");
printf("NOTE: This application will attempt to rename the\n");
printf("id.dat file on your memory card to id.bak. This will\n");
printf("allow you to preserve the original in case you want to\n");
printf("retrieve any information from it.\n");
printf("======================================================\n");
printf("\n");
psvDebugScreenSetFgColor(COLOR_RED);
printf("WARNING: use of this program is at your own risk!\n");
printf("WARNING: Use of this program is at your own risk!\n");
printf(" If a backup file (id.bak) exists already\n");
printf(" it will be removed so backup the file\n");
printf(" if you need to keep it!\n");
psvDebugScreenSetFgColor(COLOR_WHITE);
printf("\n");

printf("Insert card now, select \"No\" when asked to reboot\n");

printf("Once card is inserted press X to continue\n");
Expand All @@ -58,15 +66,32 @@ int main(int argc, char *argv[])
return 0;
}

printf("Removing id.dat\n");
// Remove the old id.bak file if it exists
printf("Checking for existing id.bak file...\n");
fd = sceIoOpen("xmc0:id.bak", SCE_O_RDONLY, 0);
if (fd >= 0) {
sceIoClose(fd);
printf("Removing old id.bak file\n");
ret = sceIoRemove("xmc0:id.bak");
if (ret != 0) {
psvDebugScreenSetFgColor(COLOR_RED);
psvDebugScreenPrintf("Unable to remove id.bak err=0x%08X\n", ret);
psvDebugScreenSetFgColor(COLOR_WHITE);
}
}

// Rename the id.dat file to id.bak so we can retain the information in it.
// NOTE: Technically if the previous attempt to remove an existing id.bak fails
// proceeding with this is sort of stupid. *shrug* Lots of checking could be
// added. Don't care. :)
printf("Renaming current id.dat to id.bak\n");
fd = sceIoOpen("xmc0:id.dat", SCE_O_RDONLY, 0);
if (fd >= 0) {
sceIoClose(fd);

ret = sceIoRemove("xmc0:id.dat");
ret = sceIoRename("xmc0:id.dat", "xmc0:id.bak");
if (ret != 0) {
psvDebugScreenSetFgColor(COLOR_RED);
psvDebugScreenPrintf("Unable to remove id.dat err=0x%08X\n", ret);
psvDebugScreenPrintf("Unable to rename id.dat err=0x%08X\n", ret);
psvDebugScreenSetFgColor(COLOR_WHITE);
}
}
Expand Down Expand Up @@ -113,4 +138,3 @@ unsigned int wait_keys(unsigned int key_mask)
sceKernelDelayThreadCB(200 * 1000);
}
}