Fossil

  const char *zHome;
  if( g.configOpen ) return;
#if defined(_WIN32)
  zHome = getenv("LOCALAPPDATA");
  if( zHome==0 ){
    zHome = getenv("APPDATA");
    if( zHome==0 ){
      char *zDrive = getenv("HOMEDRIVE");
      zHome = getenv("HOMEPATH");
      if( zDrive && zHome ) zHome = mprintf("%s%s", zDrive, zHome);
    }
  }
  if( zHome==0 ){
    fossil_fatal("cannot locate home directory - "
                "please set the LOCALAPPDATA or APPDATA or HOMEPATH "
                "environment variables");
  }
  zHome = fossil_mbcs_to_utf8(zHome);
#else
  zHome = getenv("HOME");
  if( zHome==0 ){
    fossil_fatal("cannot locate home directory - "
                 "please set the HOME environment variable");