85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
/*
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* nv.c - non volatile shell variables
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*
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* Copyright (c) 2014 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include <malloc.h>
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#include <command.h>
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#include <globalvar.h>
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#include <environment.h>
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#include <getopt.h>
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static int do_nv(int argc, char *argv[])
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{
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int opt;
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int do_remove = 0;
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int ret;
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char *value;
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while ((opt = getopt(argc, argv, "r")) > 0) {
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switch (opt) {
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case 'r':
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do_remove = 1;
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break;
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default:
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return COMMAND_ERROR_USAGE;
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}
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}
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if (argc == optind) {
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nvvar_print();
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return 0;
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}
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argc -= optind;
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argv += optind;
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if (argc != 1)
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return COMMAND_ERROR_USAGE;
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value = strchr(argv[0], '=');
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if (value) {
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*value = 0;
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value++;
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}
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if (do_remove)
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ret = nvvar_remove(argv[0]);
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else
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ret = nvvar_add(argv[0], value);
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return ret;
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}
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BAREBOX_CMD_HELP_START(nv)
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BAREBOX_CMD_HELP_TEXT("Add a new non volatile variable named VAR, optionally set to VALUE.")
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BAREBOX_CMD_HELP_TEXT("non volatile variables are persistent variables that overwrite the")
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BAREBOX_CMD_HELP_TEXT("global variables of the same name. Their value is saved with")
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BAREBOX_CMD_HELP_TEXT("'saveenv'.")
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BAREBOX_CMD_HELP_TEXT("")
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BAREBOX_CMD_HELP_TEXT("Options:")
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BAREBOX_CMD_HELP_OPT("-r", "remove a non volatile variable")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(nv)
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.cmd = do_nv,
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BAREBOX_CMD_DESC("create or set non volatile variables")
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BAREBOX_CMD_OPTS("[-r] VAR[=VALUE]")
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BAREBOX_CMD_GROUP(CMD_GRP_ENV)
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BAREBOX_CMD_HELP(cmd_nv_help)
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BAREBOX_CMD_END
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