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Mount proper system_root mirror in magiskd

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topjohnwu
2020-11-03 00:37:08 -08:00
parent 16e4c67992
commit 89fff4830b
2 changed files with 25 additions and 19 deletions
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32
native/jni/core/bootstages.cpp
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@@ -26,17 +26,20 @@ static bool safe_mode = false;
#define SETMIR(b, part) sprintf(b, "%s/" MIRRDIR "/" #part, MAGISKTMP.data())
#define SETBLK(b, part) sprintf(b, "%s/" BLOCKDIR "/" #part, MAGISKTMP.data())
#define mount_mirror(part, flag) \
else if (MNT_DIR_IS("/" #part) && me->mnt_type != "tmpfs"sv && lstat(me->mnt_dir, &st) == 0) { \
SETMIR(buf1, part); \
SETBLK(buf2, part); \
unlink(buf2); \
mknod(buf2, S_IFBLK | 0600, st.st_dev); \
xmkdir(buf1, 0755); \
xmount(buf2, buf1, me->mnt_type, flag, nullptr); \
LOGI("mount: %s\n", buf1); \
#define do_mount_mirror(part, flag) {\
SETMIR(buf1, part); \
SETBLK(buf2, part); \
unlink(buf2); \
mknod(buf2, S_IFBLK | 0600, st.st_dev); \
xmkdir(buf1, 0755); \
xmount(buf2, buf1, me->mnt_type, flag, nullptr); \
LOGI("mount: %s\n", buf1); \
}
#define mount_mirror(part, flag) \
else if (MNT_DIR_IS("/" #part) && me->mnt_type != "tmpfs"sv && lstat(me->mnt_dir, &st) == 0) \
do_mount_mirror(part, flag)
#define link_mirror(part) \
SETMIR(buf1, part); \
if (access("/system/" #part, F_OK) == 0 && access(buf1, F_OK) != 0) { \
@@ -119,10 +122,17 @@ static bool magisk_env() {
return true;
});
SETMIR(buf1, system);
SETMIR(buf2, system_root);
if (access(buf1, F_OK) != 0 && access(buf2, F_OK) == 0) {
if (access(buf1, F_OK) != 0) {
xsymlink("./system_root/system", buf1);
LOGI("link: %s\n", buf1);
parse_mnt("/proc/mounts", [&](mntent *me) {
struct stat st;
if (MNT_DIR_IS("/") && me->mnt_type != "rootfs"sv && stat("/", &st) == 0) {
do_mount_mirror(system_root, MS_RDONLY)
return false;
}
return true;
});
}
link_mirror(vendor)
link_mirror(product)