MarcoBuster/Magisk
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Code cleanups

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This commit is contained in:
topjohnwu 2018-10-04 01:49:52 -04:00
parent 6a06c92fa6
commit 09ef19f7ec
7 changed files with 55 additions and 59 deletions
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2
native/jni/daemon/bootstages.c
View File

@ -869,7 +869,7 @@ core_only:
// Check whether we have a valid manager installed
sqlite3 *db = get_magiskdb();
struct db_strings str;
INIT_DB_STRINGS(&str);
memset(&str, 0, sizeof(str));
get_db_strings(db, SU_MANAGER, &str);
if (validate_manager(str.s[SU_MANAGER], 0, NULL)) {
// There is no manager installed, install the stub

5
native/jni/daemon/db.c
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@ -8,11 +8,6 @@
#include "magisk.h"
#include "db.h"
void INIT_DB_STRINGS(struct db_strings *str) {
for (int i = 0; i < DB_STRING_NUM; ++i)
str->s[i][0] = '\0';
}
static int policy_cb(void *v, int col_num, char **data, char **col_name) {
struct su_access *su = v;
for (int i = 0; i < col_num; i++) {

15
native/jni/include/db.h
View File

@ -8,7 +8,8 @@
* DB Settings *
***************/
#define DB_SETTING_KEYS ((char *[]) { \
#define DB_SETTING_KEYS \
((char *[]) { \
"root_access", \
"multiuser_mode", \
"mnt_ns" \
@ -49,18 +50,20 @@ struct db_settings {
int v[DB_SETTINGS_NUM];
};
#define DEFAULT_DB_SETTINGS (struct db_settings) { .v = {\
#define DEFAULT_DB_SETTINGS \
(struct db_settings) { .v = { \
ROOT_ACCESS_APPS_AND_ADB, \
MULTIUSER_MODE_OWNER_ONLY, \
NAMESPACE_MODE_REQUESTER \
NAMESPACE_MODE_REQUESTER, \
}}
/**************
* DB Strings *
**************/
#define DB_STRING_KEYS ((char *[]) { \
"requester" \
#define DB_STRING_KEYS \
((char *[]) { \
"requester", \
})
#define DB_STRING_NUM (sizeof(DB_STRING_KEYS) / sizeof(char*))
@ -74,8 +77,6 @@ struct db_strings {
char s[DB_STRING_NUM][128];
};
void INIT_DB_STRINGS(struct db_strings *str);
/*************
* SU Access *
*************/

22
native/jni/su/connect.c
View File

@ -42,14 +42,14 @@ static void silent_run(char * const args[]) {
}
static void setup_user(char *user) {
switch (su_ctx->info->dbs.v[SU_MULTIUSER_MODE]) {
case MULTIUSER_MODE_OWNER_ONLY:
case MULTIUSER_MODE_OWNER_MANAGED:
sprintf(user, "%d", 0);
break;
case MULTIUSER_MODE_USER:
sprintf(user, "%d", su_ctx->info->uid / 100000);
break;
switch (DB_SET(su_ctx->info, SU_MULTIUSER_MODE)) {
case MULTIUSER_MODE_OWNER_ONLY:
case MULTIUSER_MODE_OWNER_MANAGED:
sprintf(user, "%d", 0);
break;
case MULTIUSER_MODE_USER:
sprintf(user, "%d", su_ctx->info->uid / 100000);
break;
}
}
@ -59,7 +59,7 @@ void app_log() {
char fromUid[8];
sprintf(fromUid, "%d",
su_ctx->info->dbs.v[SU_MULTIUSER_MODE] == MULTIUSER_MODE_OWNER_MANAGED ?
DB_SET(su_ctx->info, SU_MULTIUSER_MODE) == MULTIUSER_MODE_OWNER_MANAGED ?
su_ctx->info->uid % 100000 : su_ctx->info->uid);
char toUid[8];
@ -74,7 +74,7 @@ void app_log() {
char *cmd[] = {
AM_PATH, "broadcast",
"-a", "android.intent.action.BOOT_COMPLETED",
"-p", su_ctx->info->str.s[SU_MANAGER],
"-p", DB_STR(su_ctx->info, SU_MANAGER),
"--user", user,
"--es", "action", "log",
"--ei", "from.uid", fromUid,
@ -93,7 +93,7 @@ void app_connect(const char *socket) {
char *cmd[] = {
AM_PATH, "broadcast",
"-a", "android.intent.action.BOOT_COMPLETED",
"-p", su_ctx->info->str.s[SU_MANAGER],
"-p", DB_STR(su_ctx->info, SU_MANAGER),
"--user", user,
"--es", "action", "request",
"--es", "socket", (char *) socket,

30
native/jni/su/su.c
View File

@ -189,7 +189,7 @@ int su_daemon_main(int argc, char **argv) {
// Do nothing, placed here for legacy support :)
break;
case 'M':
su_ctx->info->dbs.v[SU_MNT_NS] = NAMESPACE_MODE_GLOBAL;
DB_SET(su_ctx->info, SU_MNT_NS) = NAMESPACE_MODE_GLOBAL;
break;
default:
/* Bionic getopt_long doesn't terminate its error output by newline */
@ -214,21 +214,21 @@ int su_daemon_main(int argc, char **argv) {
}
// Handle namespaces
switch (su_ctx->info->dbs.v[SU_MNT_NS]) {
case NAMESPACE_MODE_GLOBAL:
LOGD("su: use global namespace\n");
break;
case NAMESPACE_MODE_REQUESTER:
LOGD("su: use namespace of pid=[%d]\n", su_ctx->pid);
if (switch_mnt_ns(su_ctx->pid)) {
LOGD("su: setns failed, fallback to isolated\n");
switch (DB_SET(su_ctx->info, SU_MNT_NS)) {
case NAMESPACE_MODE_GLOBAL:
LOGD("su: use global namespace\n");
break;
case NAMESPACE_MODE_REQUESTER:
LOGD("su: use namespace of pid=[%d]\n", su_ctx->pid);
if (switch_mnt_ns(su_ctx->pid)) {
LOGD("su: setns failed, fallback to isolated\n");
xunshare(CLONE_NEWNS);
}
break;
case NAMESPACE_MODE_ISOLATE:
LOGD("su: use new isolated namespace\n");
xunshare(CLONE_NEWNS);
}
break;
case NAMESPACE_MODE_ISOLATE:
LOGD("su: use new isolated namespace\n");
xunshare(CLONE_NEWNS);
break;
break;
}
// Change directory to cwd

5
native/jni/su/su.h
View File

@ -21,13 +21,16 @@ struct su_info {
struct db_settings dbs;
struct db_strings str;
struct su_access access;
struct stat manager_stat;
struct stat mgr_st;
/* These should be guarded with global cache lock */
int ref;
int life;
};
#define DB_SET(i, e) (i)->dbs.v[e]
#define DB_STR(i, e) (i)->str.s[e]
struct su_request {
unsigned uid;
int login;

35
native/jni/su/su_daemon.c
View File

@ -85,7 +85,7 @@ static void database_check(struct su_info *info) {
get_db_strings(db, -1, &info->str);
// Check multiuser settings
switch (info->dbs.v[SU_MULTIUSER_MODE]) {
switch (DB_SET(info, SU_MULTIUSER_MODE)) {
case MULTIUSER_MODE_OWNER_ONLY:
if (info->uid / 100000) {
uid = -1;
@ -107,7 +107,7 @@ static void database_check(struct su_info *info) {
// We need to check our manager
if (info->access.log || info->access.notify)
validate_manager(info->str.s[SU_MANAGER], uid / 100000, &info->manager_stat);
validate_manager(DB_STR(info, SU_MANAGER), uid / 100000, &info->mgr_st);
}
static struct su_info *get_su_info(unsigned uid) {
@ -120,13 +120,10 @@ static struct su_info *get_su_info(unsigned uid) {
info = cache;
} else {
cache_miss = 1;
info = malloc(sizeof(*info));
info = xcalloc(1, sizeof(*info));
info->uid = uid;
info->dbs = DEFAULT_DB_SETTINGS;
info->access = DEFAULT_SU_ACCESS;
INIT_DB_STRINGS(&info->str);
info->ref = 0;
info->count = 0;
pthread_mutex_init(&info->lock, NULL);
cache = info;
}
@ -154,7 +151,7 @@ static struct su_info *get_su_info(unsigned uid) {
database_check(info);
// Check su access settings
switch (info->dbs.v[ROOT_ACCESS]) {
switch (DB_SET(info, ROOT_ACCESS)) {
case ROOT_ACCESS_DISABLED:
LOGE("Root access is disabled!\n");
info->access = NO_SU_ACCESS;
@ -177,7 +174,7 @@ static struct su_info *get_su_info(unsigned uid) {
}
// If it's the manager, allow it silently
if ((info->uid % 100000) == (info->manager_stat.st_uid % 100000))
if ((info->uid % 100000) == (info->mgr_st.st_uid % 100000))
info->access = SILENT_SU_ACCESS;
// Allow if it's root
@ -185,7 +182,7 @@ static struct su_info *get_su_info(unsigned uid) {
info->access = SILENT_SU_ACCESS;
// If still not determined, check if manager exists
if (info->access.policy == QUERY && info->str.s[SU_MANAGER][0] == '\0')
if (info->access.policy == QUERY && DB_STR(info, SU_MANAGER)[0] == '\0')
info->access = NO_SU_ACCESS;
}
return info;
@ -297,16 +294,16 @@ void su_daemon_receiver(int client, struct ucred *credential) {
// Default values
struct su_context ctx = {
.info = get_su_info(credential->uid),
.to = {
.uid = UID_ROOT,
.login = 0,
.keepenv = 0,
.shell = DEFAULT_SHELL,
.command = NULL,
},
.pid = credential->pid,
.pipefd = { -1, -1 }
.info = get_su_info(credential->uid),
.to = {
.uid = UID_ROOT,
.login = 0,
.keepenv = 0,
.shell = DEFAULT_SHELL,
.command = NULL,
},
.pid = credential->pid,
.pipefd = { -1, -1 }
};
// Fail fast