Start using file_util symlink code, now that it's available.

chrome/common/logging_chrome.cc

 // Copyright (c) 2010 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 "build/build_config.h"
 
 // Need to include this before most other files because it defines
 // IPC_MESSAGE_LOG_ENABLED. We need to use it to define
 // IPC_MESSAGE_MACROS_LOG_ENABLED so render_messages.h will generate the
 // ViewMsgLog et al. functions.
@@ skipping 146 matching lines @@
   // If not starting a new log, then just log through the existing
   // symlink, but if the symlink doesn't exist, create it.  If
   // starting a new log, then delete the old symlink and make a new
   // one to a fresh log file.
   FilePath target_path;
   bool symlink_exists = file_util::PathExists(symlink_path);
   if (new_log || !symlink_exists) {
     target_path = GenerateTimestampedName(symlink_path, base::Time::Now());
 
     // We don't care if the unlink fails; we're going to continue anyway.
-    if (unlink(symlink_path.value().c_str()) == -1) {
+    if (::unlink(symlink_path.value().c_str()) == -1) {
       if (symlink_exists) // only warn if we might expect it to succeed.
         PLOG(WARNING) << "Unable to unlink " << symlink_path.value();
     }
-    if (symlink(target_path.value().c_str(),
-                symlink_path.value().c_str()) == -1) {
+    if (!file_util::CreateSymbolicLink(target_path, symlink_path)) {
       PLOG(ERROR) << "Unable to create symlink " << symlink_path.value()
                   << " pointing at " << target_path.value();
     }
   } else {
-    char buf[PATH_MAX];
-    ssize_t count = readlink(symlink_path.value().c_str(), buf, arraysize(buf));
-    if (count > 0) {
-      target_path = FilePath(FilePath::StringType(buf, count));
-    } else {
+    if (!file_util::ReadSymbolicLink(symlink_path, &target_path))
       PLOG(ERROR) << "Unable to read symlink " << symlink_path.value();
-    }
   }
   return target_path;
 }
 
 void RemoveSymlinkAndLog(const FilePath& link_path,
                          const FilePath& target_path) {
   if (::unlink(link_path.value().c_str()) == -1)
     PLOG(WARNING) << "Unable to unlink symlink " << link_path.value();
   if (::unlink(target_path.value().c_str()) == -1)
     PLOG(WARNING) << "Unable to unlink log file " << target_path.value();
@@ skipping 196 matching lines @@
         assertions->push_back(wide_line);
       ++assertion_count;
     }
   }
   log_file.close();
 
   return assertion_count;
 }
 
 }  // namespace logging