get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
               char *argument)
{
  switch (optid) {
  case 'p':
    if (argument == disabled_my_option)
      argument= (char*) "";                     /* Don't require password */
    if (argument)
    {
      char *start=argument;
      my_free(opt_password);
      opt_password=my_strdup(argument,MYF(MY_FAE));
      while (*argument) *argument++= 'x';               /* Destroy argument */
      if (*start)
        start[1]=0;                             /* Cut length of argument */
      tty_password= 0;
    }
    else
      tty_password=1;
    break;
  case 'r':
    if (!(md_result_file= my_fopen(argument, O_WRONLY | FILE_BINARY,
                                    MYF(MY_WME))))
      exit(1);
    break;
  case 'W':
#ifdef __WIN__
    opt_protocol= MYSQL_PROTOCOL_PIPE;
#endif
    break;
  case 'N':
    opt_set_charset= 0;
    break;
  case 'T':
    opt_disable_keys=0;

    if (strlen(argument) >= FN_REFLEN)
    {
      /*
        This check is made because the some the file functions below
        have FN_REFLEN sized stack allocated buffers and will cause
        a crash even if the input destination buffer is large enough
        to hold the output.
      */
      die(EX_USAGE, "Input filename too long: %s", argument);
    }

    break;
  case '#':
    DBUG_PUSH(argument ? argument : default_dbug_option);
    debug_check_flag= 1;
    break;
#include <sslopt-case.h>
  case 'V': print_version(); exit(0);
  case 'X':
    opt_xml= 1;
    extended_insert= opt_drop= opt_lock=
      opt_disable_keys= opt_autocommit= opt_create_db= 0;
    break;
  case 'i':
    opt_comments_used= 1;
    break;
  case 'I':
  case '?':
    usage();
    exit(0);
  case (int) OPT_MASTER_DATA:
    if (!argument) /* work like in old versions */
      opt_master_data= MYSQL_OPT_MASTER_DATA_EFFECTIVE_SQL;
    break;
  case (int) OPT_MYSQLDUMP_SLAVE_DATA:
    if (!argument) /* work like in old versions */
      opt_slave_data= MYSQL_OPT_SLAVE_DATA_EFFECTIVE_SQL;
    break;
  case (int) OPT_OPTIMIZE:
    extended_insert= opt_drop= opt_lock= quick= create_options=
      opt_disable_keys= lock_tables= opt_set_charset= 1;
    break;
  case (int) OPT_SKIP_OPTIMIZATION:
    extended_insert= opt_drop= opt_lock= quick= create_options=
      opt_disable_keys= lock_tables= opt_set_charset= 0;
    break;
  case (int) OPT_COMPACT:
    if (opt_compact)
    {
       opt_comments= opt_drop= opt_disable_keys= opt_lock= 0;
       opt_set_charset= 0;
    }
    break;
  case (int) OPT_TABLES:
    opt_databases=0;
    break;
  case (int) OPT_IGNORE_TABLE:
  {
    if (!strchr(argument, '.'))
    {
      fprintf(stderr, "Illegal use of option --ignore-table=<database>.<table>\n");
      exit(1);
    }
    if (my_hash_insert(&ignore_table, (uchar*)my_strdup(argument, MYF(0))))
      exit(EX_EOM);
    break;
  }
  case (int) OPT_COMPATIBLE:
    {
      char buff[255];
      char *end= compatible_mode_normal_str;
      int i;
      ulong mode;
      uint err_len;

      opt_quoted= 1;
      opt_set_charset= 0;
      opt_compatible_mode_str= argument;
      opt_compatible_mode= find_set(&compatible_mode_typelib,
                                    argument, (uint) strlen(argument),
                                    &err_ptr, &err_len);
      if (err_len)
      {
        strmake(buff, err_ptr, min(sizeof(buff) - 1, err_len));
        fprintf(stderr, "Invalid mode to --compatible: %s\n", buff);
        exit(1);
      }
#if !defined(DBUG_OFF)
      {
        uint size_for_sql_mode= 0;
        const char **ptr;
        for (ptr= compatible_mode_names; *ptr; ptr++)
          size_for_sql_mode+= strlen(*ptr);
        size_for_sql_mode+= sizeof(compatible_mode_names)-1;
        DBUG_ASSERT(sizeof(compatible_mode_normal_str)>=size_for_sql_mode);
      }
#endif
      mode= opt_compatible_mode;
      for (i= 0, mode= opt_compatible_mode; mode; mode>>= 1, i++)
      {
        if (mode & 1)
        {
          end= strmov(end, compatible_mode_names[i]);
          end= strmov(end, ",");
        }
      }
      if (end!=compatible_mode_normal_str)
        end[-1]= 0;
      /*
        Set charset to the default compiled value if it hasn't
        been reset yet by --default-character-set=xxx.
      */
      if (default_charset == mysql_universal_client_charset)
        default_charset= (char*) MYSQL_DEFAULT_CHARSET_NAME;
      break;
    }
   case (int) OPT_ENABLE_CLEARTEXT_PLUGIN:
     using_opt_enable_cleartext_plugin= TRUE;
     break;
  case (int) OPT_MYSQL_PROTOCOL:
    opt_protocol= find_type_or_exit(argument, &sql_protocol_typelib,
                                    opt->name);
    break;
  }
  return 0;
}