AU: Many minor cleanup changes

src/platform/update_engine/utils.h

 // Copyright (c) 2009 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.
 
 #ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_UTILS_H__
 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_UTILS_H__
 
 #include <errno.h>
 #include <algorithm>
 #include <set>
@@ skipping 59 matching lines @@
 // Calls mkdtemp() with the tempate passed. Returns the generated dirname
 // in the dirname param. Returns TRUE on success. dirname must not be NULL.
 bool MakeTempDirectory(const std::string& dirname_template,
                        std::string* dirname);
 
 // Deletes a directory and all its contents synchronously. Returns true
 // on success. This may be called with a regular file--it will just unlink it.
 // This WILL cross filesystem boundaries.
 bool RecursiveUnlinkDir(const std::string& path);
 
+// Returns the root device for a partition. For example,
+// RootDevice("/dev/sda3") returns "/dev/sda".
+std::string RootDevice(const std::string& partition_device);
+
+// Returns the partition number, as a string, of partition_device. For example,
+// PartitionNumber("/dev/sda3") return "3".
+std::string PartitionNumber(const std::string& partition_device);
+
 // Synchronously mount or unmount a filesystem. Return true on success.
 // Mounts as ext3 with default options.
 bool MountFilesystem(const std::string& device, const std::string& mountpoint,
                      unsigned long flags);
 bool UnmountFilesystem(const std::string& mountpoint);
 
+enum BootLoader {
+  BootLoader_SYSLINUX = 0,
+  BootLoader_CHROME_FIRMWARE = 1
+};
+// Detects which bootloader this system uses and returns it via the out
+// param. Returns true on success.
+bool GetBootloader(BootLoader* out_bootloader);
+
 // Returns the error message, if any, from a GError pointer.
 const char* GetGErrorMessage(const GError* error);
 
 // Log a string in hex to LOG(INFO). Useful for debugging.
 void HexDumpArray(const unsigned char* const arr, const size_t length);
 inline void HexDumpString(const std::string& str) {
   HexDumpArray(reinterpret_cast<const unsigned char*>(str.data()), str.size());
 }
 inline void HexDumpVector(const std::vector<char>& vect) {
   HexDumpArray(reinterpret_cast<const unsigned char*>(&vect[0]), vect.size());
@@ skipping 180 matching lines @@
     bool _success = (_x);                                                      \
     if (!_success) {                                                           \
       LOG(ERROR) << #_x " failed.";                                            \
       return;                                                                  \
     }                                                                          \
   } while (0)
 
 
 
 #endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_UTILS_H__