15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "tools/android/common/daemon.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <signal.h> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <stdio.h> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <sys/types.h> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <unistd.h> 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/command_line.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/posix/eintr_wrapper.h" 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const char kNoSpawnDaemon[] = "D"; 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int g_exit_status = 0; 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Exit(int unused) { 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) _exit(g_exit_status); 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CloseFileDescriptor(int fd) { 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int old_errno = errno; 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (void) HANDLE_EINTR(close(fd)); 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) errno = old_errno; 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace tools { 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool HasHelpSwitch(const CommandLine& command_line) { 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return command_line.HasSwitch("h") || command_line.HasSwitch("help"); 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool HasNoSpawnDaemonSwitch(const CommandLine& command_line) { 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return command_line.HasSwitch(kNoSpawnDaemon); 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ShowHelp(const char* program, 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* extra_title, 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* extra_descriptions) { 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) printf("Usage: %s [-%s] %s\n" 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) " -%s stops from spawning a daemon process\n%s", 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) program, kNoSpawnDaemon, extra_title, kNoSpawnDaemon, 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) extra_descriptions); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void SpawnDaemon(int exit_status) { 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_exit_status = exit_status; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) signal(SIGUSR1, Exit); 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (fork()) { 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // In parent process. 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sleep(10); // Wait for the child process to finish setsid(). 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED(); 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // In child process. 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) setsid(); // Detach the child process from its parent. 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kill(getppid(), SIGUSR1); // Inform the parent process to exit. 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Close the standard input and outputs, otherwise the process may block 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // adbd when the shell exits. 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Comment out these lines if you want to see outputs for debugging. 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CloseFileDescriptor(0); 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CloseFileDescriptor(1); 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CloseFileDescriptor(2); 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace tools 76