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Allow ADB shell to remove modules and reboot

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This commit is contained in:
topjohnwu
2019-09-13 03:14:21 -04:00
parent 86bfb22d4c
commit e31e687602
4 changed files with 60 additions and 45 deletions
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35
native/jni/core/daemon.cpp
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@@ -1,9 +1,3 @@
/* daemon.c - Magisk Daemon
*
* Start the daemon and wait for requests
* Connect the daemon and send requests through sockets
*/
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
@@ -30,14 +24,20 @@ static void verify_client(int client, pid_t pid) {
// Verify caller is the same as server
char path[32];
sprintf(path, "/proc/%d/exe", pid);
struct stat st{};
stat(path, &st);
if (st.st_dev != SERVER_STAT.st_dev || st.st_ino != SERVER_STAT.st_ino) {
struct stat st;
if (stat(path, &st) || st.st_dev != SERVER_STAT.st_dev || st.st_ino != SERVER_STAT.st_ino) {
close(client);
pthread_exit(nullptr);
}
}
static void remove_modules() {
LOGI("* Remove all modules and reboot");
rm_rf(MODULEROOT);
rm_rf(MODULEUPGRADE);
reboot();
}
static void *request_handler(void *args) {
int client = *((int *) args);
delete (int *) args;
@@ -95,6 +95,16 @@ static void *request_handler(void *args) {
LOGD("* Use broadcasts for su logging and notify\n");
CONNECT_BROADCAST = true;
close(client);
break;
case REMOVE_MODULES:
if (credential.uid == UID_SHELL || credential.uid == UID_ROOT) {
remove_modules();
write_int(client, 0);
} else {
write_int(client, 1);
}
close(client);
break;
default:
close(client);
break;
@@ -169,6 +179,13 @@ static void main_daemon() {
}
}
void reboot() {
if (RECOVERY_MODE)
exec_command_sync("/system/bin/reboot", "recovery");
else
exec_command_sync("/system/bin/reboot");
}
int switch_mnt_ns(int pid) {
char mnt[32];
snprintf(mnt, sizeof(mnt), "/proc/%d/ns/mnt", pid);