cmd_nvedit.c

					goto sep_err;
				sep = '\0';
				chk = 1;
				break;
			case 't':		/* text format */
				if (fmt++)
					goto sep_err;
				sep = '\n';
				break;
			case 'd':
				del = 1;
				break;
			default:
				return CMD_RET_USAGE;
			}
		}
	}

	if (argc < 1)
		return CMD_RET_USAGE;

	if (!fmt)
		printf("## Warning: defaulting to text format\n");

	addr = (char *)simple_strtoul(argv[0], NULL, 16);

	if (argc == 2) {
		size = simple_strtoul(argv[1], NULL, 16);
	} else {
		char *s = addr;

		size = 0;

		while (size < MAX_ENV_SIZE) {
			if ((*s == sep) && (*(s+1) == '\0'))
				break;
			++s;
			++size;
		}
		if (size == MAX_ENV_SIZE) {
			printf("## Warning: Input data exceeds %d bytes"
				" - truncated\n", MAX_ENV_SIZE);
		}
		size += 2;
		printf("## Info: input data size = %zu = 0x%zX\n", size, size);
	}

	if (chk) {
		uint32_t crc;
		env_t *ep = (env_t *)addr;

		size -= offsetof(env_t, data);
		memcpy(&crc, &ep->crc, sizeof(crc));

		if (crc32(0, ep->data, size) != crc) {
			puts("## Error: bad CRC, import failed\n");
			return 1;
		}
		addr = (char *)ep->data;
	}

	if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR,
			0, NULL) == 0) {
		error("Environment import failed: errno = %d\n", errno);
		return 1;
	}
	gd->flags |= GD_FLG_ENV_READY;

	return 0;

sep_err:
	printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
		cmd);
	return 1;
}
#endif

/*
 * New command line interface: "env" command with subcommands
 */
static cmd_tbl_t cmd_env_sub[] = {
#if defined(CONFIG_CMD_ASKENV)
	U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
#endif
	U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
	U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS, 0, do_env_delete, "", ""),
#if defined(CONFIG_CMD_EDITENV)
	U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
#endif
#if defined(CONFIG_CMD_ENV_CALLBACK)
	U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""),
#endif
#if defined(CONFIG_CMD_ENV_FLAGS)
	U_BOOT_CMD_MKENT(flags, 1, 0, do_env_flags, "", ""),
#endif
#if defined(CONFIG_CMD_EXPORTENV)
	U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
#endif
#if defined(CONFIG_CMD_GREPENV)
	U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
#endif
#if defined(CONFIG_CMD_IMPORTENV)
	U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
#endif
	U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
#if defined(CONFIG_CMD_RUN)
	U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
#endif
#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
	U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
#endif
	U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
};

#if defined(CONFIG_NEEDS_MANUAL_RELOC)
void env_reloc(void)
{
	fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
}
#endif

static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	cmd_tbl_t *cp;

	if (argc < 2)
		return CMD_RET_USAGE;

	/* drop initial "env" arg */
	argc--;
	argv++;

	cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));

	if (cp)
		return cp->cmd(cmdtp, flag, argc, argv);

	return CMD_RET_USAGE;
}

#ifdef CONFIG_SYS_LONGHELP
static char env_help_text[] =
#if defined(CONFIG_CMD_ASKENV)
	"ask name [message] [size] - ask for environment variable\nenv "
#endif
#if defined(CONFIG_CMD_ENV_CALLBACK)
	"callbacks - print callbacks and their associated variables\nenv "
#endif
	"default [-f] -a - [forcibly] reset default environment\n"
	"env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
	"env delete [-f] var [...] - [forcibly] delete variable(s)\n"
#if defined(CONFIG_CMD_EDITENV)
	"env edit name - edit environment variable\n"
#endif
#if defined(CONFIG_CMD_EXPORTENV)
	"env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
#endif
#if defined(CONFIG_CMD_ENV_FLAGS)
	"env flags - print variables that have non-default flags\n"
#endif
#if defined(CONFIG_CMD_GREPENV)
#ifdef CONFIG_REGEX
	"env grep [-e] [-n | -v | -b] string [...] - search environment\n"
#else
	"env grep [-n | -v | -b] string [...] - search environment\n"
#endif
#endif
#if defined(CONFIG_CMD_IMPORTENV)
	"env import [-d] [-t | -b | -c] addr [size] - import environment\n"
#endif
	"env print [-a | name ...] - print environment\n"
#if defined(CONFIG_CMD_RUN)
	"env run var [...] - run commands in an environment variable\n"
#endif
#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
	"env save - save environment\n"
#endif
	"env set [-f] name [arg ...]\n";
#endif

U_BOOT_CMD(
	env, CONFIG_SYS_MAXARGS, 1, do_env,
	"environment handling commands", env_help_text
);

/*
 * Old command line interface, kept for compatibility
 */

#if defined(CONFIG_CMD_EDITENV)
U_BOOT_CMD_COMPLETE(
	editenv, 2, 0,	do_env_edit,
	"edit environment variable",
	"name\n"
	"    - edit environment variable 'name'",
	var_complete
);
#endif

U_BOOT_CMD_COMPLETE(
	printenv, CONFIG_SYS_MAXARGS, 1,	do_env_print,
	"print environment variables",
	"[-a]\n    - print [all] values of all environment variables\n"
	"printenv name ...\n"
	"    - print value of environment variable 'name'",
	var_complete
);

#ifdef CONFIG_CMD_GREPENV
U_BOOT_CMD_COMPLETE(
	grepenv, CONFIG_SYS_MAXARGS, 0,  do_env_grep,
	"search environment variables",
#ifdef CONFIG_REGEX
	"[-e] [-n | -v | -b] string ...\n"
#else
	"[-n | -v | -b] string ...\n"
#endif
	"    - list environment name=value pairs matching 'string'\n"
#ifdef CONFIG_REGEX
	"      \"-e\": enable regular expressions;\n"
#endif
	"      \"-n\": search variable names; \"-v\": search values;\n"
	"      \"-b\": search both names and values (default)",
	var_complete
);
#endif

U_BOOT_CMD_COMPLETE(
	setenv, CONFIG_SYS_MAXARGS, 0,	do_env_set,
	"set environment variables",
	"[-f] name value ...\n"
	"    - [forcibly] set environment variable 'name' to 'value ...'\n"
	"setenv [-f] name\n"
	"    - [forcibly] delete environment variable 'name'",
	var_complete
);

#if defined(CONFIG_CMD_ASKENV)

U_BOOT_CMD(
	askenv,	CONFIG_SYS_MAXARGS,	1,	do_env_ask,
	"get environment variables from stdin",
	"name [message] [size]\n"
	"    - get environment variable 'name' from stdin (max 'size' chars)"
);
#endif

#if defined(CONFIG_CMD_RUN)
U_BOOT_CMD_COMPLETE(
	run,	CONFIG_SYS_MAXARGS,	1,	do_run,
	"run commands in an environment variable",
	"var [...]\n"
	"    - run the commands in the environment variable(s) 'var'",
	var_complete
);
#endif
#endif /* CONFIG_SPL_BUILD */