Move base to DEPS

base/process/internal_linux.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 "base/process/internal_linux.h"
-
-#include <unistd.h>
-
-#include <map>
-#include <string>
-#include <vector>
-
-#include "base/files/file_util.h"
-#include "base/logging.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_split.h"
-#include "base/strings/string_util.h"
-#include "base/threading/thread_restrictions.h"
-#include "base/time/time.h"
-
-namespace base {
-namespace internal {
-
-const char kProcDir[] = "/proc";
-
-const char kStatFile[] = "stat";
-
-FilePath GetProcPidDir(pid_t pid) {
-  return FilePath(kProcDir).Append(IntToString(pid));
-}
-
-pid_t ProcDirSlotToPid(const char* d_name) {
-  int i;
-  for (i = 0; i < NAME_MAX && d_name[i]; ++i) {
-    if (!IsAsciiDigit(d_name[i])) {
-      return 0;
-    }
-  }
-  if (i == NAME_MAX)
-    return 0;
-
-  // Read the process's command line.
-  pid_t pid;
-  std::string pid_string(d_name);
-  if (!StringToInt(pid_string, &pid)) {
-    NOTREACHED();
-    return 0;
-  }
-  return pid;
-}
-
-bool ReadProcFile(const FilePath& file, std::string* buffer) {
-  buffer->clear();
-  // Synchronously reading files in /proc is safe.
-  ThreadRestrictions::ScopedAllowIO allow_io;
-
-  if (!ReadFileToString(file, buffer)) {
-    DLOG(WARNING) << "Failed to read " << file.MaybeAsASCII();
-    return false;
-  }
-  return !buffer->empty();
-}
-
-bool ReadProcStats(pid_t pid, std::string* buffer) {
-  FilePath stat_file = internal::GetProcPidDir(pid).Append(kStatFile);
-  return ReadProcFile(stat_file, buffer);
-}
-
-bool ParseProcStats(const std::string& stats_data,
-                    std::vector<std::string>* proc_stats) {
-  // |stats_data| may be empty if the process disappeared somehow.
-  // e.g. http://crbug.com/145811
-  if (stats_data.empty())
-    return false;
-
-  // The stat file is formatted as:
-  // pid (process name) data1 data2 .... dataN
-  // Look for the closing paren by scanning backwards, to avoid being fooled by
-  // processes with ')' in the name.
-  size_t open_parens_idx = stats_data.find(" (");
-  size_t close_parens_idx = stats_data.rfind(") ");
-  if (open_parens_idx == std::string::npos ||
-      close_parens_idx == std::string::npos ||
-      open_parens_idx > close_parens_idx) {
-    DLOG(WARNING) << "Failed to find matched parens in '" << stats_data << "'";
-    NOTREACHED();
-    return false;
-  }
-  open_parens_idx++;
-
-  proc_stats->clear();
-  // PID.
-  proc_stats->push_back(stats_data.substr(0, open_parens_idx));
-  // Process name without parentheses.
-  proc_stats->push_back(
-      stats_data.substr(open_parens_idx + 1,
-                        close_parens_idx - (open_parens_idx + 1)));
-
-  // Split the rest.
-  std::vector<std::string> other_stats;
-  SplitString(stats_data.substr(close_parens_idx + 2), ' ', &other_stats);
-  for (size_t i = 0; i < other_stats.size(); ++i)
-    proc_stats->push_back(other_stats[i]);
-  return true;
-}
-
-typedef std::map<std::string, std::string> ProcStatMap;
-void ParseProcStat(const std::string& contents, ProcStatMap* output) {
-  StringPairs key_value_pairs;
-  SplitStringIntoKeyValuePairs(contents, ' ', '\n', &key_value_pairs);
-  for (size_t i = 0; i < key_value_pairs.size(); ++i) {
-    output->insert(key_value_pairs[i]);
-  }
-}
-
-int64 GetProcStatsFieldAsInt64(const std::vector<std::string>& proc_stats,
-                               ProcStatsFields field_num) {
-  DCHECK_GE(field_num, VM_PPID);
-  CHECK_LT(static_cast<size_t>(field_num), proc_stats.size());
-
-  int64 value;
-  return StringToInt64(proc_stats[field_num], &value) ? value : 0;
-}
-
-size_t GetProcStatsFieldAsSizeT(const std::vector<std::string>& proc_stats,
-                                ProcStatsFields field_num) {
-  DCHECK_GE(field_num, VM_PPID);
-  CHECK_LT(static_cast<size_t>(field_num), proc_stats.size());
-
-  size_t value;
-  return StringToSizeT(proc_stats[field_num], &value) ? value : 0;
-}
-
-int64 ReadProcStatsAndGetFieldAsInt64(pid_t pid, ProcStatsFields field_num) {
-  std::string stats_data;
-  if (!ReadProcStats(pid, &stats_data))
-    return 0;
-  std::vector<std::string> proc_stats;
-  if (!ParseProcStats(stats_data, &proc_stats))
-    return 0;
-  return GetProcStatsFieldAsInt64(proc_stats, field_num);
-}
-
-size_t ReadProcStatsAndGetFieldAsSizeT(pid_t pid,
-                                       ProcStatsFields field_num) {
-  std::string stats_data;
-  if (!ReadProcStats(pid, &stats_data))
-    return 0;
-  std::vector<std::string> proc_stats;
-  if (!ParseProcStats(stats_data, &proc_stats))
-    return 0;
-  return GetProcStatsFieldAsSizeT(proc_stats, field_num);
-}
-
-Time GetBootTime() {
-  FilePath path("/proc/stat");
-  std::string contents;
-  if (!ReadProcFile(path, &contents))
-    return Time();
-  ProcStatMap proc_stat;
-  ParseProcStat(contents, &proc_stat);
-  ProcStatMap::const_iterator btime_it = proc_stat.find("btime");
-  if (btime_it == proc_stat.end())
-    return Time();
-  int btime;
-  if (!StringToInt(btime_it->second, &btime))
-    return Time();
-  return Time::FromTimeT(btime);
-}
-
-TimeDelta ClockTicksToTimeDelta(int clock_ticks) {
-  // This queries the /proc-specific scaling factor which is
-  // conceptually the system hertz.  To dump this value on another
-  // system, try
-  //   od -t dL /proc/self/auxv
-  // and look for the number after 17 in the output; mine is
-  //   0000040          17         100           3   134512692
-  // which means the answer is 100.
-  // It may be the case that this value is always 100.
-  static const int kHertz = sysconf(_SC_CLK_TCK);
-
-  return TimeDelta::FromMicroseconds(
-      Time::kMicrosecondsPerSecond * clock_ticks / kHertz);
-}
-
-}  // namespace internal
-}  // namespace base