提交: a03feed67d521413b43c2e15edebf363568e5400 - system-core (git)

system/core

Commit MetaInfo

• 修訂: a03feed67d521413b43c2e15edebf363568e5400 (tree)
• 時間: 2017-11-21 18:27:46
• 作者: Chih-Wei Huang <cwhuang@linu...>
• Commiter: Chih-Wei Huang

Log Message

init: handle ctrl-alt-del event

By setting /proc/sys/kernel/ctrl-alt-del to 1, kernel will trap
ctrl-alt-del event and send a SIGINT signal to init.

Start the ctrl-alt-del service on receiving the signal.

Change Summary

• modified: init/init.cpp

差異

--- a/init/init.cpp
+++ b/init/init.cpp
@@ -590,6 +590,19 @@ static void selinux_initialize(bool in_kernel_domain) {
     }
 }
 
+static void install_signal_handlers()
+{
+    struct sigaction action;
+    memset(&action, 0, sizeof(action));
+    sigfillset(&action.sa_mask);
+    action.sa_flags = SA_RESTART;
+    action.sa_handler = [](int sig) {
+        NOTICE("Got ctrl-alt-del: %d", sig);
+        handle_control_message("start", "ctrl-alt-del");
+    };
+    sigaction(SIGINT, &action, nullptr);
+}
+
 int main(int argc, char** argv) {
     if (strstr(argv[0], "modprobe")) {
         return modprobe_main(argc, argv);
@@ -603,6 +616,8 @@ int main(int argc, char** argv) {
         return watchdogd_main(argc, argv);
     }
 
+    install_signal_handlers();
+
     // Clear the umask.
     umask(0);