commands/setenv.c

   1 /*
   2  * Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2
   9  * as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /**
  22  * @file
  23  * @brief setenv: Set an environment variables
  24  */
  25
  26 #include <common.h>
  27 #include <command.h>
  28 #include <errno.h>
  29 #include <environment.h>
  30
  31 static int do_setenv(struct command *cmdtp, int argc, char *argv[])
  32 {
  33         if (argc < 2)
  34                 return COMMAND_ERROR_USAGE;
  35
  36         setenv(argv[1], argv[2]);
  37
  38         return 0;
  39 }
  40
  41 static const __maybe_unused char cmd_setenv_help[] =
  42 "name value ...\n"
  43 "    - set environment variable 'name' to 'value ...'\n"
  44 "setenv name\n"
  45 "    - delete environment variable 'name'\n";
  46
  47
  48 BAREBOX_CMD_START(setenv)
  49         .cmd            = do_setenv,
  50         .usage          = "set environment variables",
  51         BAREBOX_CMD_HELP(cmd_setenv_help)
  52 BAREBOX_CMD_END
  53
  54 /**
  55  * @page setenv_command setenv: set an environment variable
  56  *
  57  * Usage: setenv \<name> [\<value>]
  58  *
  59  * Set environment variable \<name> to \<value>. Without a given value, the
  60  * environment variable will be deleted.
  61  *
  62  * @note This command is only available if the simple command line parser is
  63  * in use. Within the hush shell \c setenv is not required.
  64  */