Linux: set the process title (that shows in "ps" etc.) of renderers correctly when using the zygote.

base/command_line.cc

 // Copyright (c) 2006-2008 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 "base/command_line.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
+#elif defined(OS_FREEBSD)
+#include <stdlib.h>
+#include <unistd.h>
 #endif
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/singleton.h"
 #include "base/string_piece.h"
 #include "base/string_util.h"
 #include "base/sys_string_conversions.h"
 
+#if defined(OS_LINUX)
+// Linux/glibc doesn't natively have setproctitle().
+#include "base/setproctitle_linux.h"
+#endif
+
 CommandLine* CommandLine::current_process_commandline_ = NULL;
 
 // Since we use a lazy match, make sure that longer versions (like L"--")
 // are listed before shorter versions (like L"-") of similar prefixes.
 #if defined(OS_WIN)
 const wchar_t* const kSwitchPrefixes[] = {L"--", L"-", L"/"};
 const wchar_t kSwitchTerminator[] = L"--";
 const wchar_t kSwitchValueSeparator[] = L"=";
 #elif defined(OS_POSIX)
 // Unixes don't use slash as a switch.
@@ skipping 157 matching lines @@
 void CommandLine::Init(const std::vector<std::string>& argv) {
   DCHECK(current_process_commandline_ == NULL);
 #if defined(OS_WIN)
   current_process_commandline_ = new CommandLine;
   current_process_commandline_->ParseFromString(::GetCommandLineW());
 #elif defined(OS_POSIX)
   current_process_commandline_ = new CommandLine(argv);
 #endif
 }
 
+#if defined(OS_LINUX) || defined(OS_FREEBSD)
+// static
+void CommandLine::SetProcTitle() {
+  // 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;
+  for (size_t i = 1; i < current_process_commandline_->argv_.size(); ++i) {
+    if (!title.empty())
+      title += " ";
+    title += current_process_commandline_->argv_[i];
+  }
+  setproctitle("%s", title.c_str());
+}
+
+// static
+void CommandLine::SetTrueArgv(char** argv) {
+#if defined(OS_LINUX)
+  setproctitle_init(argv);
+#endif
+}
+#endif
+
 void CommandLine::Terminate() {
   DCHECK(current_process_commandline_ != NULL);
   delete current_process_commandline_;
   current_process_commandline_ = NULL;
 }
 
 bool CommandLine::HasSwitch(const std::wstring& switch_string) const {
   std::wstring lowercased_switch(switch_string);
 #if defined(OS_WIN)
   Lowercase(&lowercased_switch);
@@ skipping 162 matching lines @@
 void CommandLine::PrependWrapper(const std::wstring& wrapper_wide) {
   // The wrapper may have embedded arguments (like "gdb --args"). In this case,
   // we don't pretend to do anything fancy, we just split on spaces.
   const std::string wrapper = base::SysWideToNativeMB(wrapper_wide);
   std::vector<std::string> wrapper_and_args;
   SplitString(wrapper, ' ', &wrapper_and_args);
   argv_.insert(argv_.begin(), wrapper_and_args.begin(), wrapper_and_args.end());
 }
 
 #endif