bcsfe-save-roundtrip

BCSFE Save Round-Trip (Battle Cats EN, rooted BlueStacks)

Edit the live Battle Cats EN save end to end: pull byte-exact, edit headlessly, push in place so uid + SELinux context survive. The non-obvious parts (RAM flush, in-place cat >, MSYS path mangling) are what bite.

Environment

• Package jp.co.ponos.battlecatsen; save at /data/data/<pkg>/files/SAVE_DATA (~539 KB primary). Siblings: SAVE_DATA.OLD = BC's own rollback, BACKUP_SAVE_DATA = cloud/transfer, SAVE_DATA4 = secondary slot.
• adb = C:\ADB\adb.exe, device 127.0.0.1:5555. App uid u0_a65 = numeric 10065. BCSFE-Python 3.3.0 venv: D:\ReverseTools\Android\BCSFE-Python\.venv.
• Serial changes across BlueStacks restarts (emulator-5554 vs 127.0.0.1:5555) — adb devices first, then target -s <serial>.

PULL (byte-exact, no CRLF/MSYS mangling)

Do it in PowerShell, not git-bash (MSYS rewrites /data & /sdcard args). BC holds the save in RAM, so flush first:

& C:\ADB\adb.exe shell input keyevent KEYCODE_HOME   # backgrounding flushes to disk
Start-Sleep -Seconds 3                                # mtime should now ~= device clock
& C:\ADB\adb.exe shell "su -c 'cp /data/data/jp.co.ponos.battlecatsen/files/SAVE_DATA /sdcard/SAVE_DATA && chmod 666 /sdcard/SAVE_DATA'"
& C:\ADB\adb.exe pull /sdcard/SAVE_DATA D:\WSA\saves\SAVE_DATA

(Force-stop does not flush — only backgrounding does. Confirm freshness by mtime ≈ device clock.)

EDIT headlessly (no interactive menu)

... mutate parsed objects (sf.catfood, sf.ototo.cannons, ...) ...

PUSH safely (the non-obvious part)

MSYS PUSH GOTCHA (cost an empty-file wipe — also applies to event_0 pushes)

Ototo cannon unlock (the "no equip button" fix)