[BUG] 2.23.0beta2 `exportCollectionPackage`: Failed to create file in '/data/local/tmp': Permission denied

[david-allison]

https://ankidroid.org/acra/app/1/bug/359357/report/e0221922-b4d3-4674-886b-57439e6db04e

I don't believe this is new

net.ankiweb.rsdroid.BackendException$BackendCardTypeException: Failed to create file in '/data/local/tmp': Permission denied (os error 13) at path "/data/local/tmp/.tmpiWbHuw"
	at net.ankiweb.rsdroid.exceptions.BackendIoException.<init>(BackendIoException.java:23)
	at net.ankiweb.rsdroid.BackendException$Companion.fromError(BackendException.kt:197)
	at net.ankiweb.rsdroid.BackendKt.unpackResult(Backend.kt:317)
	at net.ankiweb.rsdroid.BackendKt.access$unpackResult(Backend.kt:1)
	at net.ankiweb.rsdroid.Backend.runMethodRaw$lambda$1(Backend.kt:133)
	at net.ankiweb.rsdroid.Backend.withBackend(Backend.kt:145)
	at net.ankiweb.rsdroid.Backend.runMethodRaw(Backend.kt:132)
	at anki.backend.GeneratedBackend.exportCollectionPackageRaw(GeneratedBackend.kt:2745)
	at anki.backend.GeneratedBackend.exportCollectionPackage(GeneratedBackend.kt:2754)
	at com.ichi2.anki.BackendExportingKt.exportCollectionPackage(BackendExporting.kt:131)
	at com.ichi2.anki.BackendExportingKt.access$exportCollectionPackage(BackendExporting.kt:1)
	at com.ichi2.anki.BackendExportingKt$exportCollectionPackage$2$1.invokeSuspend$lambda$0(BackendExporting.kt:59)
	at com.ichi2.anki.CollectionManager.withCol$lambda$1(CollectionManager.kt:146)
	at com.ichi2.anki.CollectionManager$withQueue$3.invokeSuspend(CollectionManager.java:128)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:101)
	at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.java:113)
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:89)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:589)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:823)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:720)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:707)

11-19 10:05:02.264 I/AnkiDroid( 6734): isLegacyStorage(): current dir: /data/local/tmp/external/AnkiDroid
11-19 10:05:02.264 I/AnkiDroid( 6734): scoped external dirs: /data/local/tmp/external
11-19 10:05:02.264 I/AnkiDroid( 6734): scoped internal dir: /data/user/0/com.ichi2.anki/files
11-19 10:05:02.264 I/AnkiDroid( 6734): isLegacyStorage(): current dir: /data/local/tmp/external/AnkiDroid
11-19 10:05:02.264 I/AnkiDroid( 6734): scoped external dirs: /data/local/tmp/external
11-19 10:05:02.264 I/AnkiDroid( 6734): scoped internal dir: /data/user/0/com.ichi2.anki/files

[Arka-Saha]

Hello David sir, I would like to work on this issue. I have prior experience in building android specific applications using both Java and Kotlin, so I believe this would be a relatively easy task for me.
If you could assign this to me, I would love to give it a try and start working on it!
Thank you.

[david-allison]

Hi, thanks for the enthusiasm!

You'd be better off looking for a good first issue.

This one is potentially deep within our backend export logic and could be a struggle

[david-allison]

Anki-Android/AnkiDroid/src/main/java/com/ichi2/anki/export/ExportDialogFragment.kt

Lines 313 to 319 in b4a1400

	val exportPath =
	File(
	getExportRootFile(),
	"${CollectionManager.TR.exportingCollection()}-${getTimestamp(TimeManager.time)}.colpkg",
	).path
	requireAnkiActivity().exportCollectionPackage(exportPath, includeMedia, legacy)
	}

https://github.com/ankitects/anki/blob/5614d20bedcc4dd268136d389ad796b404a69d2c/rslib/src/backend/import_export.rs#L12-L22

https://github.com/ankitects/anki/blob/5614d20bedcc4dd268136d389ad796b404a69d2c/rslib/src/import_export/package/colpkg/export.rs#L46-L79

[david-allison]

The path should have export in the name, so it feels another temp directory is being used.

Anki-Android/AnkiDroid/src/main/java/com/ichi2/anki/export/ExportDialogFragment.kt

Lines 431 to 434 in b4a1400

	private fun getExportRootFile() =
	File(requireActivity().externalCacheDir, "export").also {
	it.mkdirs()
	}

Anki-Android/AnkiDroid/src/main/java/com/ichi2/anki/AnkiDroidApp.kt

Lines 469 to 470 in 6c247c6

	// Prevent sqlite throwing error 6410 due to the lack of /tmp on Android
	Os.setenv("TMPDIR", context.cacheDir.path, false)

[david-allison]

This is caused by context.getExternalFilesDirs(null) = /data/local/tmp/external 👀

---

scoped external dirs is unusual:

11-19 10:05:02.264 I/AnkiDroid( 6734): isLegacyStorage(): current dir: /data/local/tmp/external/AnkiDroid
11-19 10:05:02.264 I/AnkiDroid( 6734): scoped external dirs: /data/local/tmp/external
11-19 10:05:02.264 I/AnkiDroid( 6734): scoped internal dir: /data/user/0/com.ichi2.anki/files

Anki-Android/AnkiDroid/src/main/java/com/ichi2/anki/servicelayer/ScopedStorageService.kt

Lines 76 to 87 in 1be4ad3

	val internalScopedDirPath =
	CollectionHelper.getAppSpecificInternalAnkiDroidDirectory(context)
	val currentDir = currentDirPath.canonicalFile
	val externalScopedDirs =
	CollectionHelper.getAppSpecificExternalDirectories(context).map { it.canonicalFile }
	val internalScopedDir = File(internalScopedDirPath).canonicalFile
	Timber.i(
	"isLegacyStorage(): current dir: %s\nscoped external dirs: %s\nscoped internal dir: %s",
	currentDirPath,
	externalScopedDirs.joinToString(", "),
	internalScopedDirPath,
	)

Anki-Android/AnkiDroid/src/main/java/com/ichi2/anki/CollectionHelper.kt

Line 243 in cde85c7

fun getAppSpecificExternalDirectories(context: Context): List<File> = context.getExternalFilesDirs(null)?.filterNotNull() ?: listOf()

[david-allison]

This looks like abuse from a malware detection platform: hxxps://koodous.com/

https://diaowenrui.github.io/paper/issre24-li.pdf lists:

1 MODEL : OnePlus8Pro
2 BRAND : OnePlus
3 DEVICE : OnePlus8Pro
4 TAGS : release-keys
5 FINGERPRINT : OnePlus/IN2023/OnePlus8Pro:11/QKR1.191246.002/2006701342:user/release-keys

All reports from OnePlus8Pro appear spoofed. Some have CPU_ABI: x86_64.

Crash reports are either this issue, or 'send troubleshooting report', some have a comment of playstore.ankidroid@gmail.com