Move some basic early process init into Service Manager

content/common/set_process_title.cc

-// Copyright (c) 2012 The Chromium 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 "content/common/set_process_title.h"
-
-#include <stddef.h>
-
-#include "build/build_config.h"
-
-#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS)
-#include <limits.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include <string>
-
-#include "base/command_line.h"
-#endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS)
-
-#if defined(OS_LINUX)
-#include <sys/prctl.h>
-
-#include "base/files/file_path.h"
-#include "base/files/file_util.h"
-#include "base/process/process_metrics.h"
-#include "base/strings/string_util.h"
-#include "base/threading/platform_thread.h"
-// Linux/glibc doesn't natively have setproctitle().
-#include "content/common/set_process_title_linux.h"
-#endif  // defined(OS_LINUX)
-
-namespace content {
-
-// TODO(jrg): Find out if setproctitle or equivalent is available on Android.
-#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS) && \
-  !defined(OS_ANDROID)
-
-void SetProcessTitleFromCommandLine(const char** main_argv) {
-  // Build a single string which consists of all the arguments separated
-  // by spaces. We can't actually keep them separate due to the way the
-  // setproctitle() function works.
-  std::string title;
-  bool have_argv0 = false;
-
-#if defined(OS_LINUX)
-  DCHECK_EQ(base::PlatformThread::CurrentId(), getpid());
-
-  if (main_argv)
-    setproctitle_init(main_argv);
-
-  // In Linux we sometimes exec ourselves from /proc/self/exe, but this makes us
-  // show up as "exe" in process listings. Read the symlink /proc/self/exe and
-  // use the path it points at for our process title. Note that this is only for
-  // display purposes and has no TOCTTOU security implications.
-  base::FilePath target;
-  base::FilePath self_exe(base::kProcSelfExe);
-  if (base::ReadSymbolicLink(self_exe, &target)) {
-    have_argv0 = true;
-    title = target.value();
-    // If the binary has since been deleted, Linux appends " (deleted)" to the
-    // symlink target. Remove it, since this is not really part of our name.
-    const std::string kDeletedSuffix = " (deleted)";
-    if (base::EndsWith(title, kDeletedSuffix, base::CompareCase::SENSITIVE))
-      title.resize(title.size() - kDeletedSuffix.size());
-
-    // PR_SET_NAME is available in Linux 2.6.9 and newer.
-    // When available at run time, this sets the short process name that shows
-    // when the full command line is not being displayed in most process
-    // listings.
-    prctl(PR_SET_NAME, base::FilePath(title).BaseName().value().c_str());
-  }
-#endif  // defined(OS_LINUX)
-
-  const base::CommandLine* command_line =
-      base::CommandLine::ForCurrentProcess();
-  for (size_t i = 1; i < command_line->argv().size(); ++i) {
-    if (!title.empty())
-      title += " ";
-    title += command_line->argv()[i];
-  }
-  // Disable prepending argv[0] with '-' if we prepended it ourselves above.
-  setproctitle(have_argv0 ? "-%s" : "%s", title.c_str());
-}
-
-#else
-
-// All other systems (basically Windows & Mac) have no need or way to implement
-// this function.
-void SetProcessTitleFromCommandLine(const char** /* main_argv */) {
-}
-
-#endif
-
-} // namespace content