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|
/*
* (C) Copyright 2000-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
* 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 as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* Support for persistent environment data
*
* The "environment" is stored on external storage as a list of '\0'
* terminated "name=value" strings. The end of the list is marked by
* a double '\0'. The environment is preceeded by a 32 bit CRC over
* the data part and, in case of redundant environment, a byte of
* flags.
*
* This linearized representation will also be used before
* relocation, i. e. as long as we don't have a full C runtime
* environment. After that, we use a hash table.
*/
#include <common.h>
#include <command.h>
#include <environment.h>
#include <search.h>
#include <errno.h>
#include <malloc.h>
#include <watchdog.h>
#include <serial.h>
#include <linux/stddef.h>
#include <asm/byteorder.h>
#if defined(CONFIG_CMD_NET)
#include <net.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
#if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
!defined(CONFIG_ENV_IS_IN_FLASH) && \
!defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
!defined(CONFIG_ENV_IS_IN_MG_DISK) && \
!defined(CONFIG_ENV_IS_IN_MMC) && \
!defined(CONFIG_ENV_IS_IN_NAND) && \
!defined(CONFIG_ENV_IS_IN_NVRAM) && \
!defined(CONFIG_ENV_IS_IN_ONENAND) && \
!defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
!defined(CONFIG_ENV_IS_NOWHERE)
# error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
SPI_FLASH|MG_DISK|NVRAM|MMC} or CONFIG_ENV_IS_NOWHERE
#endif
#define XMK_STR(x) #x
#define MK_STR(x) XMK_STR(x)
/*
* Maximum expected input data size for import command
*/
#define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
ulong load_addr = CONFIG_SYS_LOAD_ADDR; /* Default Load Address */
/*
* Table with supported baudrates (defined in config_xyz.h)
*/
static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
#define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
/*
* This variable is incremented on each do_env_set(), so it can
* be used via get_env_id() as an indication, if the environment
* has changed or not. So it is possible to reread an environment
* variable only if the environment was changed ... done so for
* example in NetInitLoop()
*/
static int env_id = 1;
int get_env_id (void)
{
return env_id;
}
/*
* Command interface: print one or all environment variables
*
* Returns 0 in case of error, or length of printed string
*/
static int env_print(char *name)
{
char *res = NULL;
size_t len;
if (name) { /* print a single name */
ENTRY e, *ep;
e.key = name;
e.data = NULL;
hsearch_r(e, FIND, &ep, &env_htab);
if (ep == NULL)
return 0;
len = printf ("%s=%s\n", ep->key, ep->data);
return len;
}
/* print whole list */
len = hexport_r(&env_htab, '\n', &res, 0);
if (len > 0) {
puts(res);
free(res);
return len;
}
/* should never happen */
return 0;
}
int do_env_print (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
int i;
int rcode = 0;
if (argc == 1) {
/* print all env vars */
rcode = env_print(NULL);
if (!rcode)
return 1;
printf("\nEnvironment size: %d/%ld bytes\n",
rcode, (ulong)ENV_SIZE);
return 0;
}
/* print selected env vars */
for (i = 1; i < argc; ++i) {
int rc = env_print(argv[i]);
if (!rc) {
printf("## Error: \"%s\" not defined\n", argv[i]);
++rcode;
}
}
return rcode;
}
/*
* Set a new environment variable,
* or replace or delete an existing one.
*/
int _do_env_set (int flag, int argc, char * const argv[])
{
bd_t *bd = gd->bd;
int i, len;
int console = -1;
char *name, *value, *s;
ENTRY e, *ep;
name = argv[1];
if (strchr(name, '=')) {
printf ("## Error: illegal character '=' in variable name \"%s\"\n", name);
return 1;
}
env_id++;
/*
* search if variable with this name already exists
*/
e.key = name;
e.data = NULL;
hsearch_r(e, FIND, &ep, &env_htab);
/* Check for console redirection */
if (strcmp(name,"stdin") == 0) {
console = stdin;
} else if (strcmp(name,"stdout") == 0) {
console = stdout;
} else if (strcmp(name,"stderr") == 0) {
console = stderr;
}
if (console != -1) {
if (argc < 3) { /* Cannot delete it! */
printf("Can't delete \"%s\"\n", name);
return 1;
}
#ifdef CONFIG_CONSOLE_MUX
i = iomux_doenv(console, argv[2]);
if (i)
return i;
#else
/* Try assigning specified device */
if (console_assign (console, argv[2]) < 0)
return 1;
#ifdef CONFIG_SERIAL_MULTI
if (serial_assign (argv[2]) < 0)
return 1;
#endif
#endif /* CONFIG_CONSOLE_MUX */
}
/*
* Some variables like "ethaddr" and "serial#" can be set only
* once and cannot be deleted; also, "ver" is readonly.
*/
if (ep) { /* variable exists */
#ifndef CONFIG_ENV_OVERWRITE
if ((strcmp (name, "serial#") == 0) ||
((strcmp (name, "ethaddr") == 0)
#if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
&& (strcmp (ep->data,MK_STR(CONFIG_ETHADDR)) != 0)
#endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
) ) {
printf ("Can't overwrite \"%s\"\n", name);
return 1;
}
#endif
/*
* Switch to new baudrate if new baudrate is supported
*/
if (strcmp(name,"baudrate") == 0) {
int baudrate = simple_strtoul(argv[2], NULL, 10);
int i;
for (i=0; i<N_BAUDRATES; ++i) {
if (baudrate == baudrate_table[i])
break;
}
if (i == N_BAUDRATES) {
printf ("## Baudrate %d bps not supported\n",
baudrate);
return 1;
}
printf ("## Switch baudrate to %d bps and press ENTER ...\n",
baudrate);
udelay(50000);
gd->baudrate = baudrate;
#if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
gd->bd->bi_baudrate = baudrate;
#endif
serial_setbrg ();
udelay(50000);
for (;;) {
if (getc() == '\r')
break;
}
}
}
/* Delete only ? */
if ((argc < 3) || argv[2] == NULL) {
int rc = hdelete_r(name, &env_htab);
return !rc;
}
/*
* Insert / replace new value
*/
for (i=2,len=0; i<argc; ++i) {
len += strlen(argv[i]) + 1;
}
if ((value = malloc(len)) == NULL) {
printf("## Can't malloc %d bytes\n", len);
return 1;
}
for (i=2,s=value; i<argc; ++i) {
char *v = argv[i];
while ((*s++ = *v++) != '\0')
;
*(s-1) = ' ';
}
if (s != value)
*--s = '\0';
e.key = name;
e.data = value;
hsearch_r(e, ENTER, &ep, &env_htab);
free(value);
if (!ep) {
printf("## Error inserting \"%s\" variable, errno=%d\n",
name, errno);
return 1;
}
/*
* Some variables should be updated when the corresponding
* entry in the environment is changed
*/
if (strcmp(name,"ipaddr") == 0) {
char *s = argv[2]; /* always use only one arg */
char *e;
unsigned long addr;
bd->bi_ip_addr = 0;
for (addr=0, i=0; i<4; ++i) {
ulong val = s ? simple_strtoul(s, &e, 10) : 0;
addr <<= 8;
addr |= (val & 0xFF);
if (s) s = (*e) ? e+1 : e;
}
bd->bi_ip_addr = htonl(addr);
return 0;
} else if (strcmp(argv[1],"loadaddr") == 0) {
load_addr = simple_strtoul(argv[2], NULL, 16);
return 0;
}
#if defined(CONFIG_CMD_NET)
else if (strcmp(argv[1],"bootfile") == 0) {
copy_filename (BootFile, argv[2], sizeof(BootFile));
return 0;
}
#endif
return 0;
}
int setenv (char *varname, char *varvalue)
{
char * const argv[4] = { "setenv", varname, varvalue, NULL };
if ((varvalue == NULL) || (varvalue[0] == '\0'))
return _do_env_set(0, 2, argv);
else
return _do_env_set(0, 3, argv);
}
int do_env_set (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
if (argc < 2)
return cmd_usage(cmdtp);
return _do_env_set(flag, argc, argv);
}
/*
* Prompt for environment variable
*/
#if defined(CONFIG_CMD_ASKENV)
int do_env_ask ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
extern char console_buffer[CONFIG_SYS_CBSIZE];
char message[CONFIG_SYS_CBSIZE];
int size = CONFIG_SYS_CBSIZE - 1;
int i, len, pos;
char *local_args[4];
local_args[0] = argv[0];
local_args[1] = argv[1];
local_args[2] = NULL;
local_args[3] = NULL;
/* Check the syntax */
switch (argc) {
case 1:
return cmd_usage(cmdtp);
case 2: /* env_ask envname */
sprintf(message, "Please enter '%s':", argv[1]);
break;
case 3: /* env_ask envname size */
sprintf(message, "Please enter '%s':", argv[1]);
size = simple_strtoul(argv[2], NULL, 10);
break;
default: /* env_ask envname message1 ... messagen size */
for (i=2,pos=0; i < argc - 1; i++) {
if (pos) {
message[pos++] = ' ';
}
strcpy(message+pos, argv[i]);
pos += strlen(argv[i]);
}
message[pos] = '\0';
size = simple_strtoul(argv[argc - 1], NULL, 10);
break;
}
if (size >= CONFIG_SYS_CBSIZE)
size = CONFIG_SYS_CBSIZE - 1;
if (size <= 0)
return 1;
/* prompt for input */
len = readline(message);
if (size < len)
console_buffer[size] = '\0';
len = 2;
if (console_buffer[0] != '\0') {
local_args[2] = console_buffer;
len = 3;
}
/* Continue calling setenv code */
return _do_env_set(flag, len, local_args);
}
#endif
/*
* Interactively edit an environment variable
*/
#if defined(CONFIG_CMD_EDITENV)
int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
char buffer[CONFIG_SYS_CBSIZE];
char *init_val;
int len;
if (argc < 2)
return cmd_usage(cmdtp);
/* Set read buffer to initial value or empty sting */
init_val = getenv(argv[1]);
if (init_val)
len = sprintf(buffer, "%s", init_val);
else
buffer[0] = '\0';
readline_into_buffer("edit: ", buffer);
return setenv(argv[1], buffer);
}
#endif /* CONFIG_CMD_EDITENV */
/*
* Look up variable from environment,
* return address of storage for that variable,
* or NULL if not found
*/
char *getenv (char *name)
{
if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
ENTRY e, *ep;
WATCHDOG_RESET();
e.key = name;
e.data = NULL;
hsearch_r(e, FIND, &ep, &env_htab);
return (ep ? ep->data : NULL);
}
/* restricted capabilities before import */
if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
return (char *)(gd->env_buf);
return NULL;
}
/*
* Look up variable from environment for restricted C runtime env.
*/
int getenv_f (char *name, char *buf, unsigned len)
{
int i, nxt;
for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
int val, n;
for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
if (nxt >= CONFIG_ENV_SIZE) {
return (-1);
}
}
if ((val=envmatch((uchar *)name, i)) < 0)
continue;
/* found; copy out */
for (n=0; n<len; ++n, ++buf) {
if ((*buf = env_get_char(val++)) == '\0')
return n;
}
if (n)
*--buf = '\0';
printf("env_buf too small [%d]\n", len);
return n;
}
return (-1);
}
#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
int do_env_save (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
extern char * env_name_spec;
printf ("Saving Environment to %s...\n", env_name_spec);
return (saveenv() ? 1 : 0);
}
U_BOOT_CMD(
saveenv, 1, 0, do_env_save,
"save environment variables to persistent storage",
""
);
#endif
/*
* Match a name / name=value pair
*
* s1 is either a simple 'name', or a 'name=value' pair.
* i2 is the environment index for a 'name2=value2' pair.
* If the names match, return the index for the value2, else NULL.
*/
int envmatch (uchar *s1, int i2)
{
while (*s1 == env_get_char(i2++))
if (*s1++ == '=')
return(i2);
if (*s1 == '\0' && env_get_char(i2-1) == '=')
return(i2);
return(-1);
}
static int do_env_default(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
if ((argc != 2) || (strcmp(argv[1], "-f") != 0)) {
return cmd_usage(cmdtp);
}
set_default_env("## Resetting to default environment\n");
return 0;
}
static int do_env_delete(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
printf("Not implemented yet\n");
return 0;
}
#ifdef CONFIG_CMD_EXPORTENV
/*
* env export [-t | -b | -c] addr [size]
* -t: export as text format; if size is given, data will be
* padded with '\0' bytes; if not, one terminating '\0'
* will be added (which is included in the "filesize"
* setting so you can for exmple copy this to flash and
* keep the termination).
* -b: export as binary format (name=value pairs separated by
* '\0', list end marked by double "\0\0")
* -c: export as checksum protected environment format as
* used for example by "saveenv" command
* addr: memory address where environment gets stored
* size: size of output buffer
*
* With "-c" and size is NOT given, then the export command will
* format the data as currently used for the persistent storage,
* i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
* prepend a valid CRC32 checksum and, in case of resundant
* environment, a "current" redundancy flag. If size is given, this
* value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
* checksum and redundancy flag will be inserted.
*
* With "-b" and "-t", always only the real data (including a
* terminating '\0' byte) will be written; here the optional size
* argument will be used to make sure not to overflow the user
* provided buffer; the command will abort if the size is not
* sufficient. Any remainign space will be '\0' padded.
*
* On successful return, the variable "filesize" will be set.
* Note that filesize includes the trailing/terminating '\0' byte(s).
*
* Usage szenario: create a text snapshot/backup of the current settings:
*
* => env export -t 100000
* => era ${backup_addr} +${filesize}
* => cp.b 100000 ${backup_addr} ${filesize}
*
* Re-import this snapshot, deleting all other settings:
*
* => env import -d -t ${backup_addr}
*/
static int do_env_export(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
char buf[32];
char *addr, *cmd, *res;
size_t size;
ssize_t len;
env_t *envp;
char sep = '\n';
int chk = 0;
int fmt = 0;
cmd = *argv;
while (--argc > 0 && **++argv == '-') {
char *arg = *argv;
while (*++arg) {
switch (*arg) {
case 'b': /* raw binary format */
if (fmt++)
goto sep_err;
sep = '\0';
break;
case 'c': /* external checksum format */
if (fmt++)
goto sep_err;
sep = '\0';
chk = 1;
break;
case 't': /* text format */
if (fmt++)
goto sep_err;
sep = '\n';
break;
default:
return cmd_usage(cmdtp);
}
}
}
if (argc < 1) {
return cmd_usage(cmdtp);
}
addr = (char *)simple_strtoul(argv[0], NULL, 16);
if (argc == 2) {
size = simple_strtoul(argv[1], NULL, 16);
memset(addr, '\0', size);
} else {
size = 0;
}
if (sep) { /* export as text file */
len = hexport_r(&env_htab, sep, &addr, size);
if (len < 0) {
error("Cannot export environment: errno = %d\n",
errno);
return 1;
}
sprintf(buf, "%zX", (size_t)len);
setenv("filesize", buf);
return 0;
}
envp = (env_t *)addr;
if (chk) /* export as checksum protected block */
res = (char *)envp->data;
else /* export as raw binary data */
res = addr;
len = hexport_r(&env_htab, '\0', &res, ENV_SIZE);
if (len < 0) {
error("Cannot export environment: errno = %d\n",
errno);
return 1;
}
if (chk) {
envp->crc = crc32(0, envp->data, ENV_SIZE);
#ifdef CONFIG_ENV_ADDR_REDUND
envp->flags = ACTIVE_FLAG;
#endif
}
sprintf(buf, "%zX", (size_t)(len + offsetof(env_t,data)));
setenv("filesize", buf);
return 0;
sep_err:
printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
cmd);
return 1;
}
#endif
#ifdef CONFIG_CMD_IMPORTENV
/*
* env import [-d] [-t | -b | -c] addr [size]
* -d: delete existing environment before importing;
* otherwise overwrite / append to existion definitions
* -t: assume text format; either "size" must be given or the
* text data must be '\0' terminated
* -b: assume binary format ('\0' separated, "\0\0" terminated)
* -c: assume checksum protected environment format
* addr: memory address to read from
* size: length of input data; if missing, proper '\0'
* termination is mandatory
*/
static int do_env_import(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
char *cmd, *addr;
char sep = '\n';
int chk = 0;
int fmt = 0;
int del = 0;
size_t size;
cmd = *argv;
while (--argc > 0 && **++argv == '-') {
char *arg = *argv;
while (*++arg) {
switch (*arg) {
case 'b': /* raw binary format */
if (fmt++)
goto sep_err;
sep = '\0';
break;
case 'c': /* external checksum format */
if (fmt++)
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_usage(cmdtp);
}
}
}
if (argc < 1) {
return cmd_usage(cmdtp);
}
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;
printf("## Info: input data size = %zd = 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) {
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
#if defined(CONFIG_CMD_RUN)
extern int do_run (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
#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, 2, 0, do_env_delete, "", ""),
#if defined(CONFIG_CMD_EDITENV)
U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
#endif
#if defined(CONFIG_CMD_EXPORTENV)
U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
#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_usage(cmdtp);
/* 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_usage(cmdtp);
}
U_BOOT_CMD(
env, CONFIG_SYS_MAXARGS, 1, do_env,
"environment handling commands",
#if defined(CONFIG_CMD_ASKENV)
"ask name [message] [size] - ask for environment variable\nenv "
#endif
"default -f - reset default environment\n"
#if defined(CONFIG_CMD_EDITENV)
"env edit name - edit environment variable\n"
#endif
"env export [-t | -b | -c] addr [size] - export environmnt\n"
"env import [-d] [-t | -b | -c] addr [size] - import environmnt\n"
"env print [name ...] - print environment\n"
#if defined(CONFIG_CMD_RUN)
"env run var [...] - run commands in an environment variable\n"
#endif
"env save - save environment\n"
"env set [-f] name [arg ...]\n"
);
/*
* 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",
"\n - print values of all environment variables\n"
"printenv name ...\n"
" - print value of environment variable 'name'",
var_complete
);
U_BOOT_CMD_COMPLETE(
setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
"set environment variables",
"name value ...\n"
" - set environment variable 'name' to 'value ...'\n"
"setenv name\n"
" - 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)\n"
"askenv name\n"
" - get environment variable 'name' from stdin\n"
"askenv name size\n"
" - get environment variable 'name' from stdin (max 'size' chars)\n"
"askenv name [message] size\n"
" - display 'message' string and 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
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