Revert of 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