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Previous we hexpatch /init from /system/bin/init to /data/magiskinit to redirect the second stage init. However, some devices like sony has /init that does not directly invoke /system/bin/init, and thus the hexpatch fails. In this patch, we further make use of AOSP `SwitchRoot` to help us bind mount /data/magisk to /system/bin/init after `SwitchRoot`. Two important assumption about 2SI are i) that the second stage init is always /system/bin/init and ii) that the /sdcard (path after `SwitchRoot`) is always a symlink to `/storage/self/primary`. When these assumptions hold, during first stage init (before `SwitchRoot`) we can bind mount magiskinit to /sdcard, and create a symlink /storage/self/primary to /system/system/bin/init. By these steps, during `SwitchRoot`, AOSP init will try to mount move /sdcard to /system/sdcard. And /system/sdcard is symlink to /storage/self/primary, it will try to mount move /sdcard to /storage/self/primary. And /storage/self/primary in ramfs is now a symlink that points to /system/system/bin/init, thus AOSP will try to mount move /sdcard (which is a bind mount to magiskinit) to /system/system/bin/init. After chroot done by AOSP init, we then have a magiskinit bind mount on /system/bin/init, which is the second stage init. An edge case is that some devices (like meizu) use 2SI but does not switch root. In this case, they must already have a /sdcard in the ramfs, thus we can check if /sdcard exists and fallback to hexpatch.
This is not an officially supported Google product
Introduction
Magisk is a suite of open source software for customizing Android, supporting devices higher than Android 6.0.
Some highlight features:
- MagiskSU: Provide root access for applications
- Magisk Modules: Modify read-only partitions by installing modules
- MagiskBoot: The most complete tool for unpacking and repacking Android boot images
- Zygisk: Run code in every Android applications' processes
Downloads
Github is the only source where you can get official Magisk information and downloads.
Useful Links
Bug Reports
Only bug reports from Debug builds will be accepted.
For installation issues, upload both boot image and install logs.
For Magisk issues, upload boot logcat or dmesg.
For Magisk app crashes, record and upload the logcat when the crash occurs.
Translation Contributions
Default string resources for the Magisk app and its stub APK are located here:
app/src/main/res/values/strings.xmlstub/src/main/res/values/strings.xml
Translate each and place them in the respective locations ([module]/src/main/res/values-[lang]/strings.xml).
License
Magisk, including all git submodules are free software:
you can redistribute it and/or modify it under the terms of the
GNU General Public License as published by the Free Software Foundation,
either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.