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Gracefully handle ENOTSUP in ConfigFileManager.chattr0 (#523) 

The `chattr0` method, which attempts to clear special file attributes (like 'i' for immutable) using `ioctl`, can fail with an `ErrnoException` and the error code `ENOTSUP` (Operation not supported) on certain filesystems or Android environments (e.g., noted on a Android 11 device).

When `ioctl` fails with `ENOTSUP`, it means the underlying filesystem does not support the operation of setting/clearing these attributes. In this case, we can safely assume the file/directory is not immutable via this mechanism and treat the operation as a successful non-action.

This commit updates `chattr0` to catch `ErrnoException` specifically and return `true` if the error is `OsConstants.ENOTSUP`, preventing unexpected failures in config file management.
This commit is contained in:
JingMatrix 2026-01-31 15:51:03 +01:00 committed by GitHub
parent 047ad98c65
commit 3540f14481
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1 changed files with 9 additions and 0 deletions
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daemon/src/main/java/org/lsposed/lspd/service/ConfigFileManager.java
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@ -193,9 +193,18 @@ public class ConfigFileManager {
public static boolean chattr0(Path path) { public static boolean chattr0(Path path) {
try { try {
var dir = Os.open(path.toString(), OsConstants.O_RDONLY, 0); var dir = Os.open(path.toString(), OsConstants.O_RDONLY, 0);
// Clear all special file attributes on the directory
HiddenApiBridge.Os_ioctlInt(dir, Process.is64Bit() ? 0x40086602 : 0x40046602, 0); HiddenApiBridge.Os_ioctlInt(dir, Process.is64Bit() ? 0x40086602 : 0x40046602, 0);
Os.close(dir); Os.close(dir);
return true; return true;
} catch (ErrnoException e) {
// If the operation is not supported (ENOTSUP), it means the filesystem doesn't support attributes.
// We can assume the file is not immutable and proceed.
if (e.errno == OsConstants.ENOTSUP) {
return true;
}
Log.d(TAG, "chattr 0", e);
return false;
} catch (Throwable e) { } catch (Throwable e) {
Log.d(TAG, "chattr 0", e); Log.d(TAG, "chattr 0", e);
return false; return false;