text: /*
   * Copyright 2011 Google Inc.
   *
   * 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,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  struct stat sbuf;
  int fd;
  char * base;
  
  /* TODO(krussell): document /true is expected to be permanent */
  
  base = MAP_FAILED;
  fd = open(BSTG_BASEDIR"/true", O_RDONLY|O_NONBLOCK|O_NOCTTY);
  if ((fd > 0) && (fstat(fd, &sbuf) == 0)) {
      base = mmap(NULL, sbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
  }
  close(fd);
  
  if (base != MAP_FAILED) {
      fd = bstg_fdstore_get(ps);
      posix_madvise(base, sbuf.st_size, POSIX_MADV_SEQUENTIAL);
      ftruncate(fd, 0);
      pwrite(fd, base, sbuf.st_size, 0);
      munmap(base, sbuf.st_size);
  }
  
  __RCSID("$Id$");
  