Add LoggingSeekFile

util/file/file_io_posix.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 80 matching lines @@
     flags |= O_TRUNC;
   else if (mode == FileWriteMode::kCreateOrFail)
     flags |= O_EXCL;
 
   int fd = HANDLE_EINTR(
       open(path.value().c_str(), flags, world_readable ? 0644 : 0600));
   PLOG_IF(ERROR, fd < 0) << "open " << path.value();
   return fd;
 }
 
+FileOffset LoggingSeekFile(FileHandle file, FileOffset offset, int whence) {
+  off_t rv = lseek(file, offset, whence);
+  PLOG_IF(ERROR, rv < 0) << "lseek";
+  return rv;
+}
+
 bool LoggingCloseFile(FileHandle file) {
   int rv = IGNORE_EINTR(close(file));
   PLOG_IF(ERROR, rv != 0) << "close";
   return rv == 0;
 }
 
 }  // namespace crashpad