base/sys_info_posix.cc

   1 // Copyright (c) 2008 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/sys_info.h"
   6
   7 #include <errno.h>
   8 #include <string.h>
   9 #include <sys/param.h>
  10 #include <sys/statvfs.h>
  11 #include <sys/sysctl.h>
  12 #include <sys/utsname.h>
  13 #include <unistd.h>
  14
  15 #if !defined(OS_MACOSX)
  16 #include <gdk/gdk.h>
  17 #endif
  18
  19 #include "base/basictypes.h"
  20 #include "base/file_util.h"
  21 #include "base/logging.h"
  22 #include "base/utf_string_conversions.h"
  23
  24 namespace base {
  25
  26 #if !defined(OS_OPENBSD)
  27 int SysInfo::NumberOfProcessors() {
  28   // It seems that sysconf returns the number of "logical" processors on both
  29   // Mac and Linux.  So we get the number of "online logical" processors.
  30   long res = sysconf(_SC_NPROCESSORS_ONLN);
  31   if (res == -1) {
  32     NOTREACHED();
  33     return 1;
  34   }
  35
  36   return static_cast<int>(res);
  37 }
  38 #endif
  39
  40 // static
  41 int64 SysInfo::AmountOfFreeDiskSpace(const FilePath& path) {
  42   struct statvfs stats;
  43   if (statvfs(path.value().c_str(), &stats) != 0) {
  44     return -1;
  45   }
  46   return static_cast<int64>(stats.f_bavail) * stats.f_frsize;
  47 }
  48
  49 // static
  50 bool SysInfo::HasEnvVar(const wchar_t* var) {
  51   std::string var_utf8 = WideToUTF8(std::wstring(var));
  52   return getenv(var_utf8.c_str()) != NULL;
  53 }
  54
  55 // static
  56 std::wstring SysInfo::GetEnvVar(const wchar_t* var) {
  57   std::string var_utf8 = WideToUTF8(std::wstring(var));
  58   char* value = getenv(var_utf8.c_str());
  59   if (!value) {
  60     return std::wstring();
  61   } else {
  62     return UTF8ToWide(value);
  63   }
  64 }
  65
  66 // static
  67 std::string SysInfo::OperatingSystemName() {
  68   utsname info;
  69   if (uname(&info) < 0) {
  70     NOTREACHED();
  71     return "";
  72   }
  73   return std::string(info.sysname);
  74 }
  75
  76 // static
  77 std::string SysInfo::OperatingSystemVersion() {
  78   utsname info;
  79   if (uname(&info) < 0) {
  80     NOTREACHED();
  81     return "";
  82   }
  83   return std::string(info.release);
  84 }
  85
  86 // static
  87 std::string SysInfo::CPUArchitecture() {
  88   utsname info;
  89   if (uname(&info) < 0) {
  90     NOTREACHED();
  91     return "";
  92   }
  93   return std::string(info.machine);
  94 }
  95
  96 #if !defined(OS_MACOSX)
  97 // static
  98 void SysInfo::GetPrimaryDisplayDimensions(int* width, int* height) {
  99   // Note that Bad Things Happen if this isn't called from the UI thread,
 100   // but also that there's no way to check that from here.  :(
 101   GdkScreen* screen = gdk_screen_get_default();
 102   if (width)
 103     *width = gdk_screen_get_width(screen);
 104   if (height)
 105     *height = gdk_screen_get_height(screen);
 106 }
 107
 108 // static
 109 int SysInfo::DisplayCount() {
 110   // Note that Bad Things Happen if this isn't called from the UI thread,
 111   // but also that there's no way to check that from here.  :(
 112
 113   // This query is kinda bogus for Linux -- do we want number of X screens?
 114   // The number of monitors Xinerama has?  We'll just use whatever GDK uses.
 115   GdkScreen* screen = gdk_screen_get_default();
 116   return gdk_screen_get_n_monitors(screen);
 117 }
 118 #endif
 119
 120 // static
 121 size_t SysInfo::VMAllocationGranularity() {
 122   return getpagesize();
 123 }
 124
 125 }  // namespace base