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Pass MAGISKTMP over to zygote

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This commit is contained in:
topjohnwu 2021-10-27 03:25:54 -07:00
parent a3eafdd2c6
commit 983b74be77
2 changed files with 14 additions and 5 deletions
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10
native/jni/zygisk/entry.cpp
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@ -70,8 +70,9 @@ static void zygisk_cleanup_wait() {
#define SECOND_STAGE_PTR "ZYGISK_PTR"
static void second_stage_entry(void *handle, char *path) {
static void second_stage_entry(void *handle, const char *tmp, char *path) {
self_handle = handle;
MAGISKTMP = tmp;
unsetenv(INJECT_ENV_2);
unsetenv(SECOND_STAGE_PTR);
@ -101,6 +102,8 @@ static void first_stage_entry() {
ZLOGD("inject 1st stage\n");
char *ld = getenv("LD_PRELOAD");
char tmp[128];
strlcpy(tmp, getenv("MAGISKTMP"), sizeof(tmp));
char *path;
if (char *c = strrchr(ld, ':')) {
*c = '\0';
@ -111,6 +114,7 @@ static void first_stage_entry() {
path = strdup(ld);
}
unsetenv(INJECT_ENV_1);
unsetenv("MAGISKTMP");
sanitize_environ();
// Update path to 2nd stage lib
@ -128,7 +132,7 @@ static void first_stage_entry() {
char *env = getenv(SECOND_STAGE_PTR);
decltype(&second_stage_entry) second_stage;
sscanf(env, "%p", &second_stage);
second_stage(handle, path);
second_stage(handle, tmp, path);
}
__attribute__((constructor))
@ -308,7 +312,7 @@ static void setup_files(int client, const sock_cred *cred) {
string path = MAGISKTMP + "/" ZYGISKBIN "/zygisk." + basename(buf);
cp_afc(buf, (path + ".1.so").data());
cp_afc(buf, (path + ".2.so").data());
write_string(client, path);
write_string(client, MAGISKTMP);
}
static void magiskd_passthrough(int client) {

9
native/jni/zygisk/main.cpp
View File

@ -69,8 +69,12 @@ int app_process_main(int argc, char *argv[]) {
if (app_proc_fd < 0)
break;
string path = read_string(socket);
string lib = path + ".1.so";
string tmp = read_string(socket);
#if defined(__LP64__)
string lib = tmp + "/" ZYGISKBIN "/zygisk.app_process64.1.so";
#else
string lib = tmp + "/" ZYGISKBIN "/zygisk.app_process32.1.so";
#endif
if (char *ld = getenv("LD_PRELOAD")) {
char env[256];
sprintf(env, "%s:%s", ld, lib.data());
@ -79,6 +83,7 @@ int app_process_main(int argc, char *argv[]) {
setenv("LD_PRELOAD", lib.data(), 1);
}
setenv(INJECT_ENV_1, "1", 1);
setenv("MAGISKTMP", tmp.data(), 1);
close(socket);