variables.c

void
initialize_shell_variables (env, privmode)
     char **env;
     int privmode;
{

    [ … ]

      /* If exported function, define it now.  Don't import functions from
         the environment in privileged mode. */
      if (privmode == 0 && read_but_dont_execute == 0 && STREQN ("() {", string, 4))
        {
          string_length = strlen (string);
          temp_string = (char *)xmalloc (3 + string_length + char_index);

          strcpy (temp_string, name);
          temp_string[char_index] = ' ';
          strcpy (temp_string + char_index + 1, string);

          if (posixly_correct == 0 || legal_identifier (name))
            parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST);

    [ … ]
}