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Cleanup our tracks

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This commit is contained in:
topjohnwu 2020-04-19 03:33:25 -07:00
parent 7188462c55
commit 43029f37b1
4 changed files with 21 additions and 21 deletions
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32
native/jni/core/daemon.cpp
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@ -50,6 +50,7 @@ static void *request_handler(void *args) {
case LATE_START:
case BOOT_COMPLETE:
case SQLITE_CMD:
case GET_PATH:
if (credential.uid != 0) {
write_int(client, ROOT_REQUIRED);
close(client);
@ -106,7 +107,7 @@ static void *request_handler(void *args) {
return nullptr;
}
static void main_daemon() {
static void daemon_entry(int ppid) {
android_logging();
int fd = xopen("/dev/null", O_WRONLY);
@ -118,20 +119,24 @@ static void main_daemon() {
xdup2(fd, STDIN_FILENO);
if (fd > STDERR_FILENO)
close(fd);
close(fd);
setsid();
setcon("u:r:" SEPOL_PROC_DOMAIN ":s0");
// Make sure ppid is not in acct
char src[64], dest[64];
sprintf(src, "/acct/uid_0/pid_%d", ppid);
sprintf(dest, "/acct/uid_0/pid_%d", getpid());
rename(src, dest);
// Get self stat
char path[4096];
xreadlink("/proc/self/exe", path, sizeof(path));
MAGISKTMP = dirname(path);
xreadlink("/proc/self/exe", src, sizeof(src));
MAGISKTMP = dirname(src);
xstat("/proc/self/exe", &self_st);
restore_rootcon();
restore_tmpcon();
// Unmount pre-init patches
// SAR cleanups
auto mount_list = MAGISKTMP + "/" ROOTMNT;
if (access(mount_list.data(), F_OK) == 0) {
file_readline(true, mount_list.data(), [](string_view line) -> bool {
@ -139,13 +144,13 @@ static void main_daemon() {
return true;
});
}
unlink("/dev/.se");
LOGI(NAME_WITH_VER(Magisk) " daemon started\n");
// Get API level
parse_prop_file("/system/build.prop", [](auto key, auto val) -> bool {
if (key == "ro.build.version.sdk") {
LOGI("* Device API level: %s\n", val.data());
SDK_INT = parse_int(val);
return false;
}
@ -155,10 +160,10 @@ static void main_daemon() {
// In case some devices do not store this info in build.prop, fallback to getprop
auto sdk = getprop("ro.build.version.sdk");
if (!sdk.empty()) {
LOGI("* Device API level: %s\n", sdk.data());
SDK_INT = parse_int(sdk);
}
}
LOGI("* Device API level: %d\n", SDK_INT);
// Load config status
auto config = MAGISKTMP + "/" INTLROOT "/config";
@ -204,14 +209,7 @@ int connect_daemon(bool create) {
LOGD("client: launching new main daemon process\n");
if (fork_dont_care() == 0) {
close(fd);
// Make sure ppid is not in acct
char src[64], dest[64];
sprintf(src, "/acct/uid_0/pid_%d", ppid);
sprintf(dest, "/acct/uid_0/pid_%d", getpid());
rename(src, dest);
main_daemon();
daemon_entry(ppid);
}
while (connect(fd, (struct sockaddr*) &sun, len))

1
native/jni/core/magisk.cpp
View File

@ -74,7 +74,6 @@ int magisk_main(int argc, char *argv[]) {
unlock_blocks();
return 0;
} else if (argv[1] == "--restorecon"sv) {
restore_rootcon();
restorecon();
return 0;
} else if (argc >= 4 && argv[1] == "--clone-attr"sv) {;

7
native/jni/core/restorecon.cpp
View File

@ -76,8 +76,11 @@ void restorecon() {
close(fd);
}
void restore_rootcon() {
setfilecon(MAGISKTMP.data(), ROOT_CON);
void restore_tmpcon() {
if (MAGISKTMP == "/sbin")
setfilecon(MAGISKTMP.data(), ROOT_CON);
else
chmod(MAGISKTMP.data(), 0700);
auto dir = xopen_dir(MAGISKTMP.data());
int dfd = dirfd(dir.get());

2
native/jni/utils/include/selinux.hpp
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@ -33,4 +33,4 @@ void setfilecon_at(int dirfd, const char *name, const char *con);
void selinux_builtin_impl();
void dload_selinux();
void restorecon();
void restore_rootcon();
void restore_tmpcon();