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Fully migrate Magisk to C++
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topjohnwu
@@ -0,0 +1,269 @@
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#include <stdlib.h>
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#include <stdio.h>
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#include <time.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include "magisk.h"
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#include "db.h"
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#define DB_VERSION 7
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static int ver_cb(void *ver, int, char **data, char **) {
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*((int *) ver) = atoi(data[0]);
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return 0;
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}
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#define err_abort(err) \
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if (err) { \
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LOGE("sqlite3_exec: %s\n", err); \
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sqlite3_free(err); \
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return nullptr; \
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}
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static sqlite3 *open_and_init_db() {
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sqlite3 *db;
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int ret = sqlite3_open(MAGISKDB, &db);
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if (ret) {
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LOGE("sqlite3 open failure: %s\n", sqlite3_errstr(ret));
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return nullptr;
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}
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int ver, upgrade = 0;
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char *err;
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sqlite3_exec(db, "PRAGMA user_version", ver_cb, &ver, &err);
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err_abort(err);
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if (ver > DB_VERSION) {
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// Don't support downgrading database
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sqlite3_close_v2(db);
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return nullptr;
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}
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if (ver < 3) {
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// Policies
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sqlite3_exec(db,
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"CREATE TABLE IF NOT EXISTS policies "
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"(uid INT, package_name TEXT, policy INT, until INT, "
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"logging INT, notification INT, PRIMARY KEY(uid))",
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nullptr, nullptr, &err);
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err_abort(err);
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// Logs
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sqlite3_exec(db,
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"CREATE TABLE IF NOT EXISTS logs "
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"(from_uid INT, package_name TEXT, app_name TEXT, from_pid INT, "
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"to_uid INT, action INT, time INT, command TEXT)",
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nullptr, nullptr, &err);
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err_abort(err);
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// Settings
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sqlite3_exec(db,
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"CREATE TABLE IF NOT EXISTS settings "
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"(key TEXT, value INT, PRIMARY KEY(key))",
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nullptr, nullptr, &err);
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err_abort(err);
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ver = 3;
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upgrade = 1;
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}
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if (ver == 3) {
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// Strings
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sqlite3_exec(db,
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"CREATE TABLE IF NOT EXISTS strings "
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"(key TEXT, value TEXT, PRIMARY KEY(key))",
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nullptr, nullptr, &err);
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err_abort(err);
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ver = 4;
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upgrade = 1;
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}
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if (ver == 4) {
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sqlite3_exec(db, "UPDATE policies SET uid=uid%100000", nullptr, nullptr, &err);
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err_abort(err);
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/* Skip version 5 */
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ver = 6;
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upgrade = 1;
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}
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if (ver == 5 || ver == 6) {
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// Hide list
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sqlite3_exec(db,
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"CREATE TABLE IF NOT EXISTS hidelist "
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"(process TEXT, PRIMARY KEY(process))",
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nullptr, nullptr, &err);
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err_abort(err);
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ver = 7;
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upgrade =1 ;
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}
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if (upgrade) {
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// Set version
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char query[32];
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sprintf(query, "PRAGMA user_version=%d", ver);
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sqlite3_exec(db, query, nullptr, nullptr, &err);
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err_abort(err);
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}
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return db;
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}
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sqlite3 *get_magiskdb() {
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sqlite3 *db = open_and_init_db();
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if (db == nullptr) {
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// Open fails, remove and reconstruct
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unlink(MAGISKDB);
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db = open_and_init_db();
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}
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return db;
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}
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static int settings_cb(void *v, int col_num, char **data, char **col_name) {
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auto dbs = (db_settings *) v;
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int key = -1, value;
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for (int i = 0; i < col_num; ++i) {
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if (strcmp(col_name[i], "key") == 0) {
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for (int k = 0; k < DB_SETTINGS_NUM; ++k) {
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if (strcmp(data[i], DB_SETTING_KEYS[k]) == 0)
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key = k;
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}
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} else if (strcmp(col_name[i], "value") == 0) {
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value = atoi(data[i]);
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}
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}
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if (key >= 0) {
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dbs->v[key] = value;
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LOGD("magiskdb: query %s=[%d]\n", DB_SETTING_KEYS[key], value);
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}
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return 0;
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}
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int get_db_settings(sqlite3 *db, int key, struct db_settings *dbs) {
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if (db == nullptr)
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return 1;
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char *err;
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if (key > 0) {
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char query[128];
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sprintf(query, "SELECT key, value FROM settings WHERE key='%s'", DB_SETTING_KEYS[key]);
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sqlite3_exec(db, query, settings_cb, dbs, &err);
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} else {
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sqlite3_exec(db, "SELECT key, value FROM settings", settings_cb, dbs, &err);
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}
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if (err) {
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LOGE("sqlite3_exec: %s\n", err);
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sqlite3_free(err);
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return 1;
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}
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return 0;
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}
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static int strings_cb(void *v, int col_num, char **data, char **col_name) {
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auto dbs = (db_strings *) v;
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int key = -1;
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char *value;
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for (int i = 0; i < col_num; ++i) {
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if (strcmp(col_name[i], "key") == 0) {
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for (int k = 0; k < DB_STRING_NUM; ++k) {
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if (strcmp(data[i], DB_STRING_KEYS[k]) == 0)
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key = k;
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}
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} else if (strcmp(col_name[i], "value") == 0) {
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value = data[i];
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}
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}
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if (key >= 0) {
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strcpy(dbs->s[key], value);
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LOGD("magiskdb: query %s=[%s]\n", DB_STRING_KEYS[key], value);
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}
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return 0;
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}
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int get_db_strings(sqlite3 *db, int key, struct db_strings *str) {
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if (db == nullptr)
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return 1;
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char *err;
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if (key > 0) {
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char query[128];
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sprintf(query, "SELECT key, value FROM strings WHERE key='%s'", DB_STRING_KEYS[key]);
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sqlite3_exec(db, query, strings_cb, str, &err);
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} else {
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sqlite3_exec(db, "SELECT key, value FROM strings", strings_cb, str, &err);
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}
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if (err) {
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LOGE("sqlite3_exec: %s\n", err);
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sqlite3_free(err);
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return 1;
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}
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return 0;
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}
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static int policy_cb(void *v, int col_num, char **data, char **col_name) {
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auto su = (su_access *) v;
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for (int i = 0; i < col_num; i++) {
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if (strcmp(col_name[i], "policy") == 0)
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su->policy = (policy_t) atoi(data[i]);
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else if (strcmp(col_name[i], "logging") == 0)
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su->log = atoi(data[i]);
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else if (strcmp(col_name[i], "notification") == 0)
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su->notify = atoi(data[i]);
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}
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LOGD("magiskdb: query policy=[%d] log=[%d] notify=[%d]\n", su->policy, su->log, su->notify);
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return 0;
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}
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int get_uid_policy(sqlite3 *db, int uid, struct su_access *su) {
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if (db == nullptr)
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return 1;
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char query[256], *err;
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sprintf(query, "SELECT policy, logging, notification FROM policies "
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"WHERE uid=%d AND (until=0 OR until>%li)", uid, time(nullptr));
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sqlite3_exec(db, query, policy_cb, su, &err);
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if (err) {
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LOGE("sqlite3_exec: %s\n", err);
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sqlite3_free(err);
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return 1;
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}
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return 0;
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}
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int validate_manager(char *alt_pkg, int userid, struct stat *st) {
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if (st == nullptr) {
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struct stat stat;
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st = &stat;
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}
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// Prefer DE storage
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const char *base = access("/data/user_de", F_OK) == 0 ? "/data/user_de" : "/data/user";
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char app_path[128];
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sprintf(app_path, "%s/%d/%s", base, userid, alt_pkg[0] ? alt_pkg : "xxx");
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if (stat(app_path, st)) {
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// Check the official package name
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sprintf(app_path, "%s/%d/" JAVA_PACKAGE_NAME, base, userid);
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if (stat(app_path, st)) {
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LOGE("su: cannot find manager");
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memset(st, 0, sizeof(*st));
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alt_pkg[0] = '\0';
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return 1;
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} else {
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// Switch to official package if exists
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strcpy(alt_pkg, JAVA_PACKAGE_NAME);
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}
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}
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return 0;
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}
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static int print_cb(void *v, int col_num, char **data, char **col_name) {
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for (int i = 0; i < col_num; ++i) {
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if (i) printf("|");
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printf("%s=%s", col_name[i], data[i]);
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}
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printf("\n");
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return 0;
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}
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int exec_sql(const char *sql) {
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sqlite3 *db = get_magiskdb();
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if (db) {
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char *err;
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sqlite3_exec(db, sql, print_cb, nullptr, &err);
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sqlite3_close_v2(db);
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if (err) {
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fprintf(stderr, "sql_err: %s\n", err);
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sqlite3_free(err);
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return 1;
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}
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return 0;
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}
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return 1;
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}
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