1 // 2 // Copyright (C) 2012 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #include "update_engine/common/terminator.h" 18 19 #include <cstdlib> 20 21 namespace chromeos_update_engine { 22 23 volatile sig_atomic_t Terminator::exit_status_ = 1; // default exit status 24 volatile sig_atomic_t Terminator::exit_blocked_ = 0; 25 volatile sig_atomic_t Terminator::exit_requested_ = 0; 26 Init()27void Terminator::Init() { 28 exit_blocked_ = 0; 29 exit_requested_ = 0; 30 signal(SIGTERM, HandleSignal); 31 } 32 Init(int exit_status)33void Terminator::Init(int exit_status) { 34 exit_status_ = exit_status; 35 Init(); 36 } 37 Exit()38void Terminator::Exit() { 39 exit(exit_status_); 40 } 41 HandleSignal(int signum)42void Terminator::HandleSignal(int signum) { 43 if (exit_blocked_ == 0) { 44 Exit(); 45 } 46 exit_requested_ = 1; 47 } 48 ~ScopedTerminatorExitUnblocker()49ScopedTerminatorExitUnblocker::~ScopedTerminatorExitUnblocker() { 50 Terminator::set_exit_blocked(false); 51 if (Terminator::exit_requested()) { 52 Terminator::Exit(); 53 } 54 } 55 56 } // namespace chromeos_update_engine 57