Move GetFreeDiskSpace to SysInfo.

base/sys_info_posix.cc

 // Copyright (c) 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/sys_info.h"
 #include "base/basictypes.h"
 
 #include <errno.h>
 #include <string.h>
+#include <sys/statvfs.h>
 #include <unistd.h>
 
 #if defined(OS_MACOSX)
 #include <mach/mach_host.h>
 #include <mach/mach_init.h>
 #endif
 
 #include "base/logging.h"
+#include "base/string_util.h"
 
 namespace base {
 
 int SysInfo::NumberOfProcessors() {
   // It seems that sysconf returns the number of "logical" processors on both
   // mac and linux.  So we get the number of "online logical" processors.
   long res = sysconf(_SC_NPROCESSORS_ONLN);
   if (res == -1) {
     NOTREACHED();
     return 1;
@@ skipping 24 matching lines @@
   long page_size = sysconf(_SC_PAGE_SIZE);
   if (pages == -1 || page_size == -1) {
     NOTREACHED();
     return 0;
   }
 
   return static_cast<int64>(pages) * page_size;
 #endif
 }
 
+// static
+int64 SysInfo::AmountOfFreeDiskSpace(const std::wstring& path) {
+  struct statvfs stats;
+  if (statvfs(WideToUTF8(path).c_str(), &stats) != 0) {
+    return 0;
+  }
+  return static_cast<int64>(stats.f_bavail) * stats.f_frsize;
+}
+
 }  // namespace base