if( zPathInfo==0 || zPathInfo[0]==0 
      || (zPathInfo[0]=='/' && zPathInfo[1]==0) ){
    fossil_redirect_home();
  }else{
    zPath = mprintf("%s", zPathInfo);
  }

  /* Make g.zPath point to the first element of the path.  Make
  ** g.zExtra point to everything past that point.
  */
  while(1){
    char *zAltRepo = 0;
    g.zPath = &zPath[1];
    for(i=1; zPath[i] && zPath[i]!='/'; i++){}
    if( zPath[i]=='/' ){
      zPath[i] = 0;
      g.zExtra = &zPath[i+1];

      /* Look for sub-repositories.  A sub-repository is another repository
      ** that accepts the login credentials of the current repository.  A
      ** subrepository is identified by a CONFIG table entry "subrepo:NAME"
      ** where NAME is the first component of the path.  The value of the
      ** the CONFIG entries is the name of the repository.
      */
      zAltRepo = db_text(0, "SELECT value FROM config WHERE name='subrepo:%q'",
                         g.zPath);
      if( zAltRepo ){
        int nHost;
        login_check_credentials();
        if( zAltRepo[0]!='/' ){
          zAltRepo = mprintf("%s/../%z", g.zRepositoryName, zAltRepo);
          file_simplify_name(zAltRepo, -1);
        }
        db_close(1);
        db_open_repository(zAltRepo);
        fossil_free(zAltRepo);
        zPath += i;
        nHost = g.zTop - g.zBaseURL;
        g.zBaseURL = mprintf("%z/%s", g.zBaseURL, g.zPath);
        g.zTop = g.zBaseURL + nHost;
        continue;
      }
    }else{
      g.zExtra = 0;
    }
    break;
  }
  if( g.zExtra ){
    /* CGI parameters get this treatment elsewhere, but places like getfile
    ** will use g.zExtra directly.
    */
    dehttpize(g.zExtra);
    cgi_set_parameter_nocopy("name", g.zExtra);