commands/readline.c

   1 /*
   2  * (C) Copyright 2000-2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <malloc.h>
  27 #include <xfuncs.h>
  28 #include <environment.h>
  29
  30 static int do_readline (cmd_tbl_t *cmdtp, int argc, char *argv[])
  31 {
  32         char *buf = xzalloc(CONFIG_CBSIZE);
  33
  34         if (argc < 3)
  35                 return COMMAND_ERROR_USAGE;
  36
  37         if (readline(argv[1], buf, CONFIG_CBSIZE) < 0) {
  38                 free(buf);
  39                 return 1;
  40         }
  41
  42         setenv(argv[2], buf);
  43         free(buf);
  44
  45         return 0;
  46 }
  47
  48 static const __maybe_unused char cmd_readline_help[] =
  49 "Usage: readline <prompt> VAR\n"
  50 "readline reads a line of user input into variable VAR.\n";
  51
  52 U_BOOT_CMD_START(readline)
  53         .cmd            = do_readline,
  54         .usage          = "prompt for user input",
  55         U_BOOT_CMD_HELP(cmd_readline_help)
  56 U_BOOT_CMD_END
  57