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Migrate EXT4 images instead of removing them

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This commit is contained in:
topjohnwu 2019-02-12 16:13:31 -05:00
parent ed027ec3ee
commit 0f55fcafe8
3 changed files with 40 additions and 16 deletions
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38
native/jni/core/bootstages.cpp
View File

@ -324,9 +324,7 @@ static void exec_common_script(const char* stage) {
continue;
LOGI("%s.d: exec [%s]\n", stage, entry->d_name);
exec_t exec { .pre_exec = strcmp(stage, "post-fs-data") ? set_path : set_mirror_path };
int pid = exec_command(exec, MIRRDIR "/system/bin/sh", entry->d_name);
if (pid != -1)
waitpid(pid, nullptr, 0);
exec_command_sync(exec, MIRRDIR "/system/bin/sh", entry->d_name);
}
}
@ -342,9 +340,7 @@ static void exec_module_script(const char* stage) {
continue;
LOGI("%s: exec [%s.sh]\n", module, stage);
exec_t exec { .pre_exec = strcmp(stage, "post-fs-data") ? set_path : set_mirror_path };
int pid = exec_command(exec, MIRRDIR "/system/bin/sh", buf2);
if (pid != -1)
waitpid(pid, nullptr, 0);
exec_command_sync(exec, MIRRDIR "/system/bin/sh", buf2);
}
}
@ -417,8 +413,6 @@ static bool magisk_env() {
// Remove legacy stuffs
unlink("/data/magisk.img");
unlink("/data/magisk_debug.log");
unlink(SECURE_DIR "/magisk.img");
unlink(SECURE_DIR "/magisk_merge.img");
// Legacy support
symlink(MAGISKTMP, "/sbin/.core");
@ -487,7 +481,35 @@ static bool magisk_env() {
return true;
}
/* Too lazy to do it natively, let's write some scripts */
static const char migrate_cmd[] =
"IMG=%s;"
"MNT=/dev/img_mnt;"
"e2fsck -yf $IMG;"
"mkdir -p $MNT;"
"for num in 0 1 2 3 4 5 6 7; do"
" losetup /dev/block/loop${num} $IMG || continue;"
" mount -t ext4 /dev/block/loop${num} $MNT;"
" rm -rf $MNT/lost+found $MNT/.core;"
" magisk --clone $MNT " MODULEROOT ";"
" umount $MNT;"
" rm -rf $MNT;"
" losetup -d /dev/block/loop${num};"
" break;"
"done;"
"rm -rf $IMG";
static void upgrade_modules() {
const char *legacy_imgs[] = {SECURE_DIR "/magisk.img", SECURE_DIR "/magisk_merge.img"};
for (auto img : legacy_imgs) {
if (access(img, F_OK) == 0) {
LOGI("* Migrating %s\n", img);
exec_t exec { .pre_exec = set_path };
char cmds[sizeof(migrate_cmd) + 32];
sprintf(cmds, migrate_cmd, img);
exec_command_sync(exec, "/system/bin/sh", "-c", cmds);
}
}
DIR *dir;
struct dirent *entry;
if ((dir = opendir(MODULEUPGRADE))) {

12
native/jni/utils/include/utils.h
View File

@ -162,11 +162,17 @@ int exec_command(exec_t &exec, Args &&...args) {
exec.argv = argv;
return exec_command(exec);
}
int exec_command_sync(const char **argv);
int exec_command_sync(exec_t &exec);
template <class ...Args>
int exec_command_sync(exec_t &exec, Args &&...args) {
const char *argv[] = {args..., nullptr};
exec.argv = argv;
return exec_command_sync(exec);
}
template <class ...Args>
int exec_command_sync(Args &&...args) {
const char *argv[] = {args..., nullptr};
return exec_command_sync(argv);
exec_t exec{};
return exec_command_sync(exec, args...);
}
#endif

6
native/jni/utils/misc.cpp
View File

@ -11,13 +11,10 @@
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/sysmacros.h>
#include <vector>
#include <logging.h>
#include <utils.h>
using namespace std;
unsigned get_shell_uid() {
struct passwd* ppwd = getpwnam("shell");
if (nullptr == ppwd)
@ -195,8 +192,7 @@ int exec_command(exec_t &exec) {
exit(-1);
}
int exec_command_sync(const char **argv) {
exec_t exec { .argv = argv };
int exec_command_sync(exec_t &exec) {
int pid, status;
pid = exec_command(exec);
if (pid < 0)