From 8de03eef3fc4e9c7bd3f247ace36c0826d3be0e5 Mon Sep 17 00:00:00 2001
From: topjohnwu <topjohnwu@gmail.com>
Date: Sat, 23 Mar 2019 03:50:55 -0400
Subject: [PATCH] Allow modules to have custom uninstaller script

---
 native/jni/core/bootstages.cpp | 3 +++
 native/jni/core/scripting.cpp  | 8 ++++++++
 native/jni/include/daemon.h    | 1 +
 3 files changed, 12 insertions(+)

diff --git a/native/jni/core/bootstages.cpp b/native/jni/core/bootstages.cpp
index 046b35324..453202fa8 100644
--- a/native/jni/core/bootstages.cpp
+++ b/native/jni/core/bootstages.cpp
@@ -482,6 +482,9 @@ static void collect_modules() {
 			if (access("remove", F_OK) == 0) {
 				chdir("..");
 				LOGI("%s: remove\n", entry->d_name);
+				sprintf(buf, "%s/uninstall.sh", entry->d_name);
+				if (access(buf, F_OK) == 0)
+					exec_script(buf);
 				rm_rf(entry->d_name);
 				continue;
 			}
diff --git a/native/jni/core/scripting.cpp b/native/jni/core/scripting.cpp
index 2e4f9d1b8..2ae0f7547 100644
--- a/native/jni/core/scripting.cpp
+++ b/native/jni/core/scripting.cpp
@@ -16,6 +16,14 @@ static void set_path() {
 	setenv("PATH", buf, 1);
 }
 
+void exec_script(const char *script) {
+	exec_t exec {
+		.pre_exec = set_path,
+		.fork = fork_no_zombie
+	};
+	exec_command_sync(exec, "/system/bin/sh", script);
+}
+
 void exec_common_script(const char *stage) {
 	char path[4096];
 	DIR *dir;
diff --git a/native/jni/include/daemon.h b/native/jni/include/daemon.h
index f8edcd5b0..637a7a6c2 100644
--- a/native/jni/include/daemon.h
+++ b/native/jni/include/daemon.h
@@ -69,6 +69,7 @@ void boot_complete(int client);
  * Scripting *
  *************/
 
+void exec_script(const char *script);
 void exec_common_script(const char *stage);
 void exec_module_script(const char *stage, const std::vector<std::string> &module_list);
 void migrate_img(const char *img);