Merge "Do not block SIGTERM in init's child processes" (176afbbe) · Commits · e / os / android_system_core

init/init.cpp

+17 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@
		#include <dirent.h>
		#include <fcntl.h>
		#include <paths.h>
		#include <pthread.h>
		#include <seccomp_policy.h>
		#include <signal.h>
		#include <stdlib.h>
		@@ -491,6 +492,16 @@ static void HandleSigtermSignal() {
		HandlePowerctlMessage("shutdown,container");
		}

		static void UnblockSigterm() {
		sigset_t mask;
		sigemptyset(&mask);
		sigaddset(&mask, SIGTERM);

		if (sigprocmask(SIG_UNBLOCK, &mask, nullptr) == -1) {
		PLOG(FATAL) << "failed to unblock SIGTERM for PID " << getpid();
		}
		}

		static void InstallSigtermHandler() {
		sigset_t mask;
		sigemptyset(&mask);
		@@ -500,6 +511,12 @@ static void InstallSigtermHandler() {
		PLOG(FATAL) << "failed to block SIGTERM";
		}

		// Register a handler to unblock SIGTERM in the child processes.
		const int result = pthread_atfork(nullptr, nullptr, &UnblockSigterm);
		if (result != 0) {
		LOG(FATAL) << "Failed to register a fork handler: " << strerror(result);
		}

		sigterm_signal_fd = signalfd(-1, &mask, SFD_CLOEXEC);
		if (sigterm_signal_fd == -1) {
		PLOG(FATAL) << "failed to create signalfd for SIGTERM";