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/*
* nv.c - non volatile shell variables
*
* Copyright (c) 2014 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <common.h>
#include <malloc.h>
#include <command.h>
#include <globalvar.h>
#include <environment.h>
#include <getopt.h>
#include <complete.h>
static int do_nv(int argc, char *argv[])
{
int opt;
int do_remove = 0, do_save = 0;
int failed = 0, i;
char *value;
while ((opt = getopt(argc, argv, "rs")) > 0) {
switch (opt) {
case 'r':
do_remove = 1;
break;
case 's':
do_save = 1;
break;
default:
return COMMAND_ERROR_USAGE;
}
}
if (argc == 1) {
nvvar_print();
return 0;
}
if (do_save) {
return nvvar_save();
}
argc -= optind;
argv += optind;
if (argc < 1) {
printf("Invalid usage: Missing argument");
return COMMAND_ERROR_USAGE;
}
for (i = 0; i < argc; i++) {
int ret;
value = strchr(argv[0], '=');
if (value) {
*value = 0;
value++;
}
if (do_remove) {
ret = nvvar_remove(argv[i]);
if (ret) {
printf("Failed removing %s: %s\n", argv[i], strerror(-ret));
failed = 1;
}
} else {
ret = nvvar_add(argv[i], value);
if (ret) {
printf("Failed adding %s: %s\n", argv[i], strerror(-ret));
failed = 1;
}
}
}
return failed;
}
BAREBOX_CMD_HELP_START(nv)
BAREBOX_CMD_HELP_TEXT("Add a new non volatile (NV) variable named VAR, optionally set to VALUE.")
BAREBOX_CMD_HELP_TEXT("NV variables are persistent variables that overwrite the global variables")
BAREBOX_CMD_HELP_TEXT("of the same name.")
BAREBOX_CMD_HELP_TEXT("Their value is saved implicitly with 'saveenv' or explicitly with 'nv -s'")
BAREBOX_CMD_HELP_TEXT("")
BAREBOX_CMD_HELP_TEXT("Options:")
BAREBOX_CMD_HELP_OPT("-r VAR1 ...", "remove NV variable(s)")
BAREBOX_CMD_HELP_OPT("-s\t", "save NV variables")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(nv)
.cmd = do_nv,
BAREBOX_CMD_DESC("create, set or remove non volatile (NV) variables")
BAREBOX_CMD_OPTS("[-r] VAR[=VALUE] ...")
BAREBOX_CMD_GROUP(CMD_GRP_ENV)
BAREBOX_CMD_HELP(cmd_nv_help)
BAREBOX_CMD_COMPLETE(nv_complete)
BAREBOX_CMD_END
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