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Add support for pre-init custom sepolicy patches

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Close #1685
This commit is contained in:
topjohnwu
2019-12-13 06:05:12 -05:00
parent af060b3132
commit 12fda29280
4 changed files with 46 additions and 8 deletions
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22
native/jni/init/mount.cpp
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@ -126,6 +126,13 @@ void RootFSInit::early_mount() {
root = xopen("/", O_RDONLY | O_CLOEXEC);
rename("/.backup/init", "/init");
// Mount sbin overlay for persist, but move it and add to cleanup list
mount_sbin();
xmount("/sbin", "/dev", nullptr, MS_MOVE, nullptr);
mount_list.emplace_back("/dev");
mount_list.emplace_back("/dev/.magisk/mirror/persist");
mount_list.emplace_back("/dev/.magisk/mirror/cache");
mount_root(system);
mount_root(vendor);
mount_root(product);
@ -169,6 +176,7 @@ void SARInit::early_mount() {
// Make dev writable
xmkdir("/dev", 0755);
xmount("tmpfs", "/dev", "tmpfs", 0, "mode=755");
mount_list.emplace_back("/dev");
backup_files();
@ -227,9 +235,11 @@ void SecondStageInit::early_mount() {
void BaseInit::cleanup() {
// Unmount in reverse order
for (auto &p : reversed(mount_list)) {
LOGD("Unmount [%s]\n", p.data());
umount(p.data());
if (xumount(p.data()) == 0)
LOGD("Unmount [%s]\n", p.data());
}
mount_list.clear();
mount_list.shrink_to_fit();
}
void mount_sbin() {
@ -248,8 +258,12 @@ void mount_sbin() {
// Fallback to cache
strcpy(partname, "cache");
strcpy(block_dev, BLOCKDIR "/cache");
if (setup_block(false) < 0)
return;
if (setup_block(false) < 0) {
// Try NVIDIA's BS
strcpy(partname, "CAC");
if (setup_block(false) < 0)
return;
}
mnt_point = MIRRDIR "/cache";
xsymlink("./cache", MIRRDIR "/persist");
}