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Added a write permission system

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This commit is contained in:
d0k3 2016-02-29 22:51:20 +01:00
parent 759da56e67
commit 44c351c1a7
3 changed files with 41 additions and 1 deletions
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34
source/fs.c
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@ -10,6 +10,9 @@ static u8* main_buffer = (u8*)0x21100000;
// this is the main buffer size
static size_t main_buffer_size = 4 * 1024 * 1024;
// write permission level - careful with this
static u32 write_permission_level = 1;
// number of currently open file systems
static u32 numfs = 0;
@ -42,9 +45,38 @@ void DeinitFS() {
numfs = 0;
}
bool CheckWritePermissions(const char* path) {
u32 pdrv = *path - '0';
if ((pdrv > 6) || (*(path+1) != ':')) {
ShowPrompt(false, "Invalid path");
return false;
}
if ((pdrv >= 1) && (pdrv <= 3) && (write_permission_level < 3)) {
ShowPrompt(false, "Writing to the SysNAND is locked!\nUnlock it from the root menu.");
return false;
} else if ((pdrv >= 4) && (pdrv <= 6) && (write_permission_level < 2)) {
ShowPrompt(false, "Writing to the EmuNAND is locked!\nUnlock it from the root menu.");
return false;
} else if ((pdrv == 0) && (write_permission_level < 1)) {
ShowPrompt(false, "Writing to the SD card is locked!\nUnlock it from the root menu.");
return false;
}
return true;
}
bool SetWritePermissions(u32 level) {
write_permission_level = level;
return true;
}
bool FileCreate(const char* path, u8* data, u32 size) {
FIL file;
UINT bytes_written = 0;
if (!CheckWritePermissions(path)) return false;
if (f_open(&file, path, FA_READ | FA_WRITE | FA_CREATE_ALWAYS) != FR_OK)
return false;
f_write(&file, data, size, &bytes_written);
@ -145,6 +177,7 @@ bool PathCopyWorker(char* dest, char* orig) {
bool PathCopy(const char* destdir, const char* orig) {
char fdpath[256]; // 256 is the maximum length of a full path
char fopath[256];
if (!CheckWritePermissions(destdir)) return false;
strncpy(fdpath, destdir, 256);
strncpy(fopath, orig, 256);
return PathCopyWorker(fdpath, fopath);
@ -187,6 +220,7 @@ bool PathDeleteWorker(char* fpath) {
bool PathDelete(const char* path) {
char fpath[256]; // 256 is the maximum length of a full path
if (!CheckWritePermissions(path)) return false;
strncpy(fpath, path, 256);
return PathDeleteWorker(fpath);
}

6
source/fs.h
View File

@ -26,6 +26,12 @@ typedef struct {
bool InitFS();
void DeinitFS();
/** Check if writing to this path is allowed **/
bool CheckWritePermissions(const char* path);
/** Set new write permissions */
bool SetWritePermissions(u32 level);
/** Create / overwrite file and write the provided data to it **/
bool FileCreate(const char* path, u8* data, u32 size);

2
source/godmode.c
View File

@ -56,7 +56,7 @@ void DrawUserInterface(const char* curr_path, DirEntry* curr_entry, DirStruct* c
// bottom: inctruction block
char* instr = "GodMode 9 v0.0.1\n<A>/<B>/<\x18\x19\x1A\x1B> - Navigation\n<L> - Mark (multiple) file(s)\n<X> - Make a Screenshot\n<START/+\x1B> - Reboot / Power off";
char* instr = "GodMode 9 v0.0.3\n<A>/<B>/<\x18\x19\x1A\x1B> - Navigation\n<L>(+<\x18\x19\x1A\x1B> - Mark entries(s)\n<X> - Make a Screenshot\n<START/+\x1B> - Reboot/Poweroff";
DrawStringF(true, (SCREEN_WIDTH_TOP - GetDrawStringWidth(instr)) / 2, SCREEN_HEIGHT - 2 - GetDrawStringHeight(instr), COLOR_STD_FONT, COLOR_STD_BG, instr);
}