| // Copyright 2015 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "germ/germ_init.h" |
| |
| #include <grp.h> |
| #include <signal.h> |
| #include <sys/types.h> |
| #include <sysexits.h> |
| #include <unistd.h> |
| |
| #include <string> |
| #include <vector> |
| |
| #include <base/bind.h> |
| #include <base/bind_helpers.h> |
| #include <base/location.h> |
| #include <base/logging.h> |
| #include <base/message_loop/message_loop.h> |
| #include <chromeos/daemons/daemon.h> |
| |
| #include "germ/init_process_reaper.h" |
| #include "germ/proto_bindings/soma_container_spec.pb.h" |
| |
| namespace germ { |
| |
| GermInit::GermInit(const soma::ContainerSpec& spec) |
| : init_process_reaper_(base::Bind(&GermInit::Quit, base::Unretained(this))), |
| spec_(spec) {} |
| GermInit::~GermInit() {} |
| |
| int GermInit::OnInit() { |
| init_process_reaper_.RegisterWithDaemon(this); |
| |
| int return_code = chromeos::Daemon::OnInit(); |
| if (return_code != 0) { |
| LOG(ERROR) << "Error initializing chromeos::Daemon"; |
| return return_code; |
| } |
| |
| // It is important that we start all processes in a single task, since |
| // otherwise |init_process_reaper_| might cause us to exit after only some of |
| // the processes have exited. This is because InitProcessReaper's behavior is: |
| // after reaping a child, if we have no more children, then exit. Thus, we |
| // need to ensure that it never reaps a process while we're still in the |
| // middle of starting them. |
| CHECK(base::MessageLoop::current()->task_runner()->PostTask( |
| FROM_HERE, |
| base::Bind(&GermInit::StartProcesses, base::Unretained(this)))); |
| return EX_OK; |
| } |
| |
| void GermInit::StartProcesses() { |
| size_t i = 0; |
| for (const auto& executable : spec_.executables()) { |
| const pid_t pid = fork(); |
| PCHECK(pid != -1) << "fork() failed: " << spec_.name() << "executable " |
| << i; |
| |
| if (pid == 0) { |
| sigset_t mask; |
| PCHECK(sigemptyset(&mask) == 0); |
| PCHECK(sigprocmask(SIG_SETMASK, &mask, nullptr) == 0); |
| |
| launcher_.ExecveInMinijail(executable); |
| LOG(FATAL) << "execve() failed: " << spec_.name() << " executable " << i; |
| } |
| |
| ++i; |
| } |
| } |
| |
| } // namespace germ |