Magisk/native/jni/include/db.h

#ifndef DB_H
#define DB_H

#include <sqlite3.h>
#include <sys/stat.h>

/***************
 * DB Settings *
 ***************/

#define DB_SETTING_KEYS \
((const char *[]) { \
"root_access", \
"multiuser_mode", \
"mnt_ns" \
})

#define DB_SETTINGS_NUM 3

// Settings indices
enum {
	ROOT_ACCESS = 0,
	SU_MULTIUSER_MODE,
	SU_MNT_NS
};

// Values for root_access
enum {
	ROOT_ACCESS_DISABLED = 0,
	ROOT_ACCESS_APPS_ONLY,
	ROOT_ACCESS_ADB_ONLY,
	ROOT_ACCESS_APPS_AND_ADB
};

// Values for multiuser_mode
enum {
	MULTIUSER_MODE_OWNER_ONLY = 0,
	MULTIUSER_MODE_OWNER_MANAGED,
	MULTIUSER_MODE_USER
};

// Values for mnt_ns
enum {
	NAMESPACE_MODE_GLOBAL = 0,
	NAMESPACE_MODE_REQUESTER,
	NAMESPACE_MODE_ISOLATE
};

struct db_settings {
	int v[DB_SETTINGS_NUM];
	db_settings()
			: v {
		ROOT_ACCESS_APPS_AND_ADB,
		MULTIUSER_MODE_OWNER_ONLY,
		NAMESPACE_MODE_REQUESTER
	} {}
};

/**************
 * DB Strings *
 **************/

#define DB_STRING_KEYS \
((const char *[]) { \
"requester", \
})

#define DB_STRING_NUM 1

// Strings indices
enum {
	SU_MANAGER = 0
};

struct db_strings {
	char s[DB_STRING_NUM][128];
	db_strings() {
		for (int i = 0; i < DB_STRING_NUM; ++i)
			s[i][0] = '\0';
	}
};

/*************
 * SU Access *
 *************/

typedef enum {
	QUERY = 0,
	DENY = 1,
	ALLOW = 2,
} policy_t;

struct su_access {
	policy_t policy;
	int log;
	int notify;
};

#define DEFAULT_SU_ACCESS (su_access) { \
.policy = QUERY, \
.log = 1, \
.notify = 1 \
}

#define SILENT_SU_ACCESS (su_access) { \
.policy = ALLOW, \
.log = 0, \
.notify = 0 \
}

#define NO_SU_ACCESS (su_access) { \
.policy = DENY, \
.log = 0, \
.notify = 0 \
}

/********************
 * Public Functions *
 ********************/

sqlite3 *get_magiskdb();
int get_db_settings(sqlite3 *db, int key, struct db_settings *dbs);
int get_db_strings(sqlite3 *db, int key, struct db_strings *str);
int get_uid_policy(sqlite3 *db, int uid, struct su_access *su);
int validate_manager(char *alt_pkg, int userid, struct stat *st);
int exec_sql(const char *sql);

#endif //DB_H