static char *enter_chroot_jail(char *zRepo){
#if !defined(_WIN32)
  if( getuid()==0 ){
    int i;
    struct stat sStat;
    Blob dir;
    char *zDir;




    file_canonical_name(zRepo, &dir, 0);
    zDir = blob_str(&dir);
    if( file_isdir(zDir)==1 ){
      if( file_chdir(zDir, 1) ){
        fossil_fatal("unable to chroot into %s", zDir);
      }

      fossil_fatal("cannot stat() repository: %s", zRepo);
    }
    i = setgid(sStat.st_gid);
    i = i || setuid(sStat.st_uid);
    if(i){
      fossil_fatal("setgid/uid() failed with errno %d", errno);
    }
    if( g.db!=0 ){
      db_close(1);
      db_open_repository(zRepo);
    }
  }
#endif
  return zRepo;
}

/*
** Preconditions: