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Workaround for case sensitive file renaming

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This commit is contained in:
d0k3 2016-03-28 20:10:43 +02:00
parent dc8bf2c52e
commit 4492de3856
1 changed files with 31 additions and 2 deletions
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33
source/fs.c
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@ -124,6 +124,21 @@ u32 GetWritePermissions() {
return write_permission_level; return write_permission_level;
} }
bool GetTempFileName(char* path) {
// this assumes path is initialized with enough room
char* tempname = strrchr(path, '/');
if (!tempname) return false;
tempname++;
strncpy(tempname, "AAAAAAAA.TMP", 255 - (tempname - path));
char* cc = tempname;
// this does not try all permutations
for (; (*cc <= 'Z') && (cc - tempname < 8); (*cc)++) {
if (f_stat(path, NULL) != FR_OK) break;
if (*cc == 'Z') cc++;
}
return (cc - tempname < 8) ? true : false;
}
bool FileCreateData(const char* path, u8* data, size_t size) { bool FileCreateData(const char* path, u8* data, size_t size) {
FIL file; FIL file;
UINT bytes_written = 0; UINT bytes_written = 0;
@ -463,12 +478,26 @@ bool PathDelete(const char* path) {
bool PathRename(const char* path, const char* newname) { bool PathRename(const char* path, const char* newname) {
char npath[256]; // 256 is the maximum length of a full path char npath[256]; // 256 is the maximum length of a full path
char* oldname = strrchr(path, '/'); char* oldname = strrchr(path, '/');
if (!CheckWritePermissions(path)) return false; if (!CheckWritePermissions(path)) return false;
if (!oldname) return false; if (!oldname) return false;
oldname++; oldname++;
strncpy(npath, path, oldname - path); strncpy(npath, path, oldname - path);
strncpy(npath + (oldname - path), newname, strnlen(newname, 255 - (oldname - path))); strncpy(npath + (oldname - path), newname, 255 - (oldname - path));
return (f_rename(path, npath) == FR_OK);
FRESULT res = f_rename(path, npath);
if (res == FR_EXIST) { // new path already exists (possible LFN/case issue)
char temp[256];
strncpy(temp, path, oldname - path);
if (!GetTempFileName(temp)) return false;
if (f_rename(path, temp) == FR_OK) {
if ((f_stat(npath, NULL) == FR_OK) || (f_rename(temp, npath) != FR_OK)) {
ShowPrompt(false, "Destination exists in folder");
f_rename(temp, path); // something went wrong - try renaming back
return false;
} else return true;
} else return false;
} else return (res == FR_OK) ? true : false;
} }
bool DirCreate(const char* cpath, const char* dirname) { bool DirCreate(const char* cpath, const char* dirname) {