tools/env/fw_env_main.c

   1 /*
   2  * (C) Copyright 2000
   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 /*
  25  * Command line user interface to firmware (=U-Boot) environment.
  26  *
  27  * Implements:
  28  *      fw_printenv [ name ... ]
  29  *              - prints the values of the environment variables
  30  *                "name", or the whole environment if no names are
  31  *                specified
  32  *      fw_setenv name [ value ... ]
  33  *              - If a name without any values is given, the variable
  34  *                with this name is deleted from the environment;
  35  *                otherwise, all "value" arguments are concatenated,
  36  *                separated by sinlge blank characters, and the
  37  *                resulting string is assigned to the environment
  38  *                variable "name"
  39  */
  40
  41 #include <stdio.h>
  42 #include <string.h>
  43 #include <stdlib.h>
  44 #include "fw_env.h"
  45
  46 #define CMD_PRINTENV    "fw_printenv"
  47 #define CMD_SETENV      "fw_setenv"
  48
  49 int
  50 main(int argc, char *argv[])
  51 {
  52         char *p;
  53         char *cmdname = *argv;
  54
  55         if ((p = strrchr (cmdname, '/')) != NULL) {
  56                 cmdname = p + 1;
  57         }
  58
  59         if (strcmp(cmdname, CMD_PRINTENV) == 0) {
  60
  61                         fw_printenv (argc, argv);
  62
  63                         return (EXIT_SUCCESS);
  64
  65         } else if (strcmp(cmdname, CMD_SETENV) == 0) {
  66
  67                         if (fw_setenv (argc, argv) != 0)
  68                                 return (EXIT_FAILURE);
  69
  70                         return (EXIT_SUCCESS);
  71         }
  72
  73         fprintf (stderr,
  74                 "Identity crisis - may be called as `" CMD_PRINTENV
  75                 "' or as `" CMD_SETENV "' but not as `%s'\n",
  76                 cmdname);
  77         return (EXIT_FAILURE);
  78 }