* This seems to be a logic that has been abandoned for a
long time. Now we automatically choose which partition
to store sepolicy.rule. Furthermore, touching /persist is
what we should avoid doing whenever possible.
Fix#4204
`_root` is uninitialized for non-root nodes. And it will cause `module_node::mount` fail because it uses `root()`. Once the bug is triggered, signal 11 is received but Magisk catch all signals and therefore stuck forever.
* There will be garbage output when executing `su` (#4016)
* Failed to check root status and showing N/A in status (#4005)
Signed-off-by: Shaka Huang <shakalaca@gmail.com>
- Block signals in logging routine (fix#3976)
- Prevent possible deadlock after fork (stdio locks internally)
by creating a new FILE pointer per logging call (thread/stack local)
Previously, Magisk uses persist or cache for storing modules' custom
sepolicy rules. In this commit, we significantly broaden its
compatibility and also prevent mounting errors.
The persist partition is non-standard and also critical for Snapdragon
devices, so we prefer not to use it by default.
We will go through the following logic to find the best suitable
non-volatile, writable location to store and load sepolicy.rule files:
Unencrypted data -> FBE data unencrypted dir -> cache -> metadata -> persist
This should cover almost all possible cases: very old devices have
cache partitions; newer devices will use FBE; latest devices will use
metadata FBE (which guarantees a metadata parition); and finally,
all Snapdragon devices have the persist partition (as a last resort).
Fix#3179
Due to changes in ec3705f2ed, the app can
no longer communicate with the dameon through a socket opened on the
daemon side due to SELinux restrictions. The workaround here is to have
the daemon decide a socket name, send it to the app, have the app create
the socket server, then finally the daemon connects to the app through
the socket.
