U-Boot. Исходные тексты команд: nvedit.c // SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000-2013
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
*
* Copyright 2011 Freescale Semiconductor, Inc.
*/
/*
* 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 preceded 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 <cli.h>
#include <command.h>
#include <console.h>
#include <env.h>
#include <env_internal.h>
#include <log.h>
#include <search.h>
#include <errno.h>
#include <malloc.h>
#include <mapmem.h>
#include <asm/global_data.h>
#include <linux/bitops.h>
#include <linux/printk.h>
#include <u-boot/crc.h>
#include <linux/stddef.h>
#include <asm/byteorder.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Maximum expected input data size for import command
*/
#define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
/*
* This variable is incremented on each do_env_set(), so it can
* be used via env_get_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 env_get_id(void)
{
return env_id;
}
#ifndef CONFIG_SPL_BUILD
/*
* 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, int flag)
{
char *res = NULL;
ssize_t len;
if (name) { /* print a single name */
struct env_entry e, *ep;
e.key = name;
e.data = NULL;
hsearch_r(e, ENV_FIND, &ep, &env_htab, flag);
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', flag, &res, 0, 0, NULL);
if (len > 0) {
puts(res);
free(res);
return len;
}
/* should never happen */
printf("## Error: cannot export environment\n");
return 0;
}
static int do_env_print(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int i;
int rcode = 0;
int env_flag = H_HIDE_DOT;
#if defined(CONFIG_CMD_NVEDIT_EFI)
if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'e')
return do_env_print_efi(cmdtp, flag, --argc, ++argv);
#endif
if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
argc--;
argv++;
env_flag &= ~H_HIDE_DOT;
}
if (argc == 1) {
/* print all env vars */
rcode = env_print(NULL, env_flag);
if (!rcode)
return 1;
printf("\nEnvironment size: %d/%ld bytes\n",
rcode, (ulong)ENV_SIZE);
return 0;
}
/* print selected env vars */
env_flag &= ~H_HIDE_DOT;
for (i = 1; i < argc; ++i) {
int rc = env_print(argv[i], env_flag);
if (!rc) {
printf("## Error: \"%s\" not defined\n", argv[i]);
++rcode;
}
}
return rcode;
}
#ifdef CONFIG_CMD_GREPENV
static int do_env_grep(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
char *res = NULL;
int len, grep_how, grep_what;
if (argc < 2)
return CMD_RET_USAGE;
grep_how = H_MATCH_SUBSTR; /* default: substring search */
grep_what = H_MATCH_BOTH; /* default: grep names and values */
while (--argc > 0 && **++argv == '-') {
char *arg = *argv;
while (*++arg) {
switch (*arg) {
#ifdef CONFIG_REGEX
case 'e': /* use regex matching */
grep_how = H_MATCH_REGEX;
break;
#endif
case 'n': /* grep for name */
grep_what = H_MATCH_KEY;
break;
case 'v': /* grep for value */
grep_what = H_MATCH_DATA;
break;
case 'b': /* grep for both */
grep_what = H_MATCH_BOTH;
break;
case '-':
goto DONE;
default:
return CMD_RET_USAGE;
}
}
}
DONE:
len = hexport_r(&env_htab, '\n',
flag | grep_what | grep_how,
&res, 0, argc, argv);
if (len > 0) {
puts(res);
free(res);
}
if (len < 2)
return 1;
return 0;
}
#endif
#endif /* CONFIG_SPL_BUILD */
/*
* Set a new environment variable,
* or replace or delete an existing one.
*/
static int _do_env_set(int flag, int argc, char *const argv[], int env_flag)
{
int i, len;
char *name, *value, *s;
struct env_entry e, *ep;
debug("Initial value for argc=%d\n", argc);
#if !IS_ENABLED(CONFIG_SPL_BUILD) && IS_ENABLED(CONFIG_CMD_NVEDIT_EFI)
if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'e')
return do_env_set_efi(NULL, flag, --argc, ++argv);
#endif
while (argc > 1 && **(argv + 1) == '-') {
char *arg = *++argv;
--argc;
while (*++arg) {
switch (*arg) {
case 'f': /* force */
env_flag |= H_FORCE;
break;
default:
return CMD_RET_USAGE;
}
}
}
debug("Final value for argc=%d\n", argc);
name = argv[1];
if (strchr(name, '=')) {
printf("## Error: illegal character '='"
"in variable name \"%s\"\n", name);
return 1;
}
env_id++;
/* Delete only ? */
if (argc < 3 || argv[2] == NULL) {
int rc = hdelete_r(name, &env_htab, env_flag);
/* If the variable didn't exist, don't report an error */
return rc && rc != -ENOENT ? 1 : 0;
}
/*
* Insert / replace new value
*/
for (i = 2, len = 0; i < argc; ++i)
len += strlen(argv[i]) + 1;
value = malloc(len);
if (value == 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, ENV_ENTER, &ep, &env_htab, env_flag);
free(value);
if (!ep) {
printf("## Error inserting \"%s\" variable, errno=%d\n",
name, errno);
return 1;
}
return 0;
}
int env_set(const char *varname, const char *varvalue)
{
const char * const argv[4] = { "setenv", varname, varvalue, NULL };
/* before import into hashtable */
if (!(gd->flags & GD_FLG_ENV_READY))
return 1;
if (varvalue == NULL || varvalue[0] == '\0')
return _do_env_set(0, 2, (char * const *)argv, H_PROGRAMMATIC);
else
return _do_env_set(0, 3, (char * const *)argv, H_PROGRAMMATIC);
}
#ifndef CONFIG_SPL_BUILD
static int do_env_set(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
if (argc < 2)
return CMD_RET_USAGE;
return _do_env_set(flag, argc, argv, H_INTERACTIVE);
}
/*
* Prompt for environment variable
*/
#if defined(CONFIG_CMD_ASKENV)
int do_env_ask(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
char message[CONFIG_SYS_CBSIZE];
int i, len, pos, size;
char *local_args[4];
char *endptr;
local_args[0] = argv[0];
local_args[1] = argv[1];
local_args[2] = NULL;
local_args[3] = NULL;
/*
* Check the syntax:
*
* env_ask envname [message1 ...] [size]
*/
if (argc == 1)
return CMD_RET_USAGE;
/*
* We test the last argument if it can be converted
* into a decimal number. If yes, we assume it's
* the size. Otherwise we echo it as part of the
* message.
*/
i = dectoul(argv[argc - 1], &endptr);
if (*endptr != '\0') { /* no size */
size = CONFIG_SYS_CBSIZE - 1;
} else { /* size given */
size = i;
--argc;
}
if (argc <= 2) {
sprintf(message, "Please enter '%s': ", argv[1]);
} else {
/* env_ask envname message1 ... messagen [size] */
for (i = 2, pos = 0; i < argc && pos+1 < sizeof(message); i++) {
if (pos)
message[pos++] = ' ';
strncpy(message + pos, argv[i], sizeof(message) - pos);
pos += strlen(argv[i]);
}
if (pos < sizeof(message) - 1) {
message[pos++] = ' ';
message[pos] = '\0';
} else
message[CONFIG_SYS_CBSIZE - 1] = '\0';
}
if (size >= CONFIG_SYS_CBSIZE)
size = CONFIG_SYS_CBSIZE - 1;
if (size <= 0)
return 1;
/* prompt for input */
len = cli_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, H_INTERACTIVE);
}
#endif
#if defined(CONFIG_CMD_ENV_CALLBACK)
static int print_static_binding(const char *var_name, const char *callback_name,
void *priv)
{
printf("\t%-20s %-20s\n", var_name, callback_name);
return 0;
}
static int print_active_callback(struct env_entry *entry)
{
struct env_clbk_tbl *clbkp;
int i;
int num_callbacks;
if (entry->callback == NULL)
return 0;
/* look up the callback in the linker-list */
num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
i < num_callbacks;
i++, clbkp++) {
if (entry->callback == clbkp->callback)
break;
}
if (i == num_callbacks)
/* this should probably never happen, but just in case... */
printf("\t%-20s %p\n", entry->key, entry->callback);
else
printf("\t%-20s %-20s\n", entry->key, clbkp->name);
return 0;
}
/*
* Print the callbacks available and what they are bound to
*/
int do_env_callback(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct env_clbk_tbl *clbkp;
int i;
int num_callbacks;
/* Print the available callbacks */
puts("Available callbacks:\n");
puts("\tCallback Name\n");
puts("\t-------------\n");
num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
i < num_callbacks;
i++, clbkp++)
printf("\t%s\n", clbkp->name);
puts("\n");
/* Print the static bindings that may exist */
puts("Static callback bindings:\n");
printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
printf("\t%-20s %-20s\n", "-------------", "-------------");
env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding, NULL);
puts("\n");
/* walk through each variable and print the callback if it has one */
puts("Active callback bindings:\n");
printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
printf("\t%-20s %-20s\n", "-------------", "-------------");
hwalk_r(&env_htab, print_active_callback);
return 0;
}
#endif
#if defined(CONFIG_CMD_ENV_FLAGS)
static int print_static_flags(const char *var_name, const char *flags,
void *priv)
{
enum env_flags_vartype type = env_flags_parse_vartype(flags);
enum env_flags_varaccess access = env_flags_parse_varaccess(flags);
printf("\t%-20s %-20s %-20s\n", var_name,
env_flags_get_vartype_name(type),
env_flags_get_varaccess_name(access));
return 0;
}
static int print_active_flags(struct env_entry *entry)
{
enum env_flags_vartype type;
enum env_flags_varaccess access;
if (entry->flags == 0)
return 0;
type = (enum env_flags_vartype)
(entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK);
access = env_flags_parse_varaccess_from_binflags(entry->flags);
printf("\t%-20s %-20s %-20s\n", entry->key,
env_flags_get_vartype_name(type),
env_flags_get_varaccess_name(access));
return 0;
}
/*
* Print the flags available and what variables have flags
*/
int do_env_flags(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
/* Print the available variable types */
printf("Available variable type flags (position %d):\n",
ENV_FLAGS_VARTYPE_LOC);
puts("\tFlag\tVariable Type Name\n");
puts("\t----\t------------------\n");
env_flags_print_vartypes();
puts("\n");
/* Print the available variable access types */
printf("Available variable access flags (position %d):\n",
ENV_FLAGS_VARACCESS_LOC);
puts("\tFlag\tVariable Access Name\n");
puts("\t----\t--------------------\n");
env_flags_print_varaccess();
puts("\n");
/* Print the static flags that may exist */
puts("Static flags:\n");
printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
"Variable Access");
printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
"---------------");
env_attr_walk(ENV_FLAGS_LIST_STATIC, print_static_flags, NULL);
puts("\n");
/* walk through each variable and print the flags if non-default */
puts("Active flags:\n");
printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
"Variable Access");
printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
"---------------");
hwalk_r(&env_htab, print_active_flags);
return 0;
}
#endif
/*
* Interactively edit an environment variable
*/
#if defined(CONFIG_CMD_EDITENV)
static int do_env_edit(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
char buffer[CONFIG_SYS_CBSIZE];
char *init_val;
if (argc < 2)
return CMD_RET_USAGE;
/* before import into hashtable */
if (!(gd->flags & GD_FLG_ENV_READY))
return 1;
/* Set read buffer to initial value or empty sting */
init_val = env_get(argv[1]);
if (init_val)
snprintf(buffer, CONFIG_SYS_CBSIZE, "%s", init_val);
else
buffer[0] = '\0';
if (cli_readline_into_buffer("edit: ", buffer, 0) < 0)
return 1;
if (buffer[0] == '\0') {
const char * const _argv[3] = { "setenv", argv[1], NULL };
return _do_env_set(0, 2, (char * const *)_argv, H_INTERACTIVE);
} else {
const char * const _argv[4] = { "setenv", argv[1], buffer,
NULL };
return _do_env_set(0, 3, (char * const *)_argv, H_INTERACTIVE);
}
}
#endif /* CONFIG_CMD_EDITENV */
#if defined(CONFIG_CMD_SAVEENV) && !IS_ENABLED(CONFIG_ENV_IS_DEFAULT)
static int do_env_save(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
return env_save() ? 1 : 0;
}
U_BOOT_CMD(
saveenv, 1, 0, do_env_save,
"save environment variables to persistent storage",
""
);
#if defined(CONFIG_CMD_ERASEENV)
static int do_env_erase(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
return env_erase() ? 1 : 0;
}
U_BOOT_CMD(
eraseenv, 1, 0, do_env_erase,
"erase environment variables from persistent storage",
""
);
#endif
#endif
#if defined(CONFIG_CMD_NVEDIT_LOAD)
static int do_env_load(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
return env_reload() ? 1 : 0;
}
#endif
#if defined(CONFIG_CMD_NVEDIT_SELECT)
static int do_env_select(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
return env_select(argv[1]) ? 1 : 0;
}
#endif
#endif /* CONFIG_SPL_BUILD */
#ifndef CONFIG_SPL_BUILD
static int do_env_default(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
int all = 0, env_flag = H_INTERACTIVE;
debug("Initial value for argc=%d\n", argc);
while (--argc > 0 && **++argv == '-') {
char *arg = *argv;
while (*++arg) {
switch (*arg) {
case 'a': /* default all */
all = 1;
break;
case 'f': /* force */
env_flag |= H_FORCE;
break;
default:
return cmd_usage(cmdtp);
}
}
}
debug("Final value for argc=%d\n", argc);
if (all && (argc == 0)) {
/* Reset the whole environment */
env_set_default("## Resetting to default environment\n",
env_flag);
return 0;
}
if (!all && (argc > 0)) {
/* Reset individual variables */
env_set_default_vars(argc, argv, env_flag);
return 0;
}
return cmd_usage(cmdtp);
}
static int do_env_delete(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
int env_flag = H_INTERACTIVE;
int ret = 0;
debug("Initial value for argc=%d\n", argc);
while (argc > 1 && **(argv + 1) == '-') {
char *arg = *++argv;
--argc;
while (*++arg) {
switch (*arg) {
case 'f': /* force */
env_flag |= H_FORCE;
break;
default:
return CMD_RET_USAGE;
}
}
}
debug("Final value for argc=%d\n", argc);
env_id++;
while (--argc > 0) {
char *name = *++argv;
if (hdelete_r(name, &env_htab, env_flag))
ret = 1;
}
return ret;
}
#ifdef CONFIG_CMD_EXPORTENV
/*
* env export [-t | -b | -c] [-s size] addr [var ...]
* -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
* -s size:
* size of output buffer
* addr: memory address where environment gets stored
* var... List of variable names that get included into the
* export. Without arguments, the whole environment gets
* exported.
*
* 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 redundant
* 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 remaining 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 scenario: 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(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
char buf[32];
ulong addr;
char *ptr, *cmd, *res;
size_t size = 0;
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 's': /* size given */
if (--argc <= 0)
return cmd_usage(cmdtp);
size = hextoul(*++argv, NULL);
goto NXTARG;
case 't': /* text format */
if (fmt++)
goto sep_err;
sep = '\n';
break;
default:
return CMD_RET_USAGE;
}
}
NXTARG: ;
}
if (argc < 1)
return CMD_RET_USAGE;
addr = hextoul(argv[0], NULL);
ptr = map_sysmem(addr, size);
if (size)
memset(ptr, '\0', size);
argc--;
argv++;
if (sep) { /* export as text file */
len = hexport_r(&env_htab, sep,
H_MATCH_KEY | H_MATCH_IDENT,
&ptr, size, argc, argv);
if (len < 0) {
pr_err("## Error: Cannot export environment: errno = %d\n",
errno);
return 1;
}
sprintf(buf, "%zX", (size_t)len);
env_set("filesize", buf);
return 0;
}
envp = (env_t *)ptr;
if (chk) /* export as checksum protected block */
res = (char *)envp->data;
else /* export as raw binary data */
res = ptr;
len = hexport_r(&env_htab, '\0',
H_MATCH_KEY | H_MATCH_IDENT,
&res, ENV_SIZE, argc, argv);
if (len < 0) {
pr_err("## Error: Cannot export environment: errno = %d\n",
errno);
return 1;
}
if (chk) {
envp->crc = crc32(0, envp->data,
size ? size - offsetof(env_t, data) : ENV_SIZE);
#ifdef CONFIG_ENV_ADDR_REDUND
envp->flags = ENV_REDUND_ACTIVE;
#endif
}
env_set_hex("filesize", len + offsetof(env_t, data));
return 0;
sep_err:
printf("## Error: %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
cmd);
return 1;
}
#endif
#ifdef CONFIG_CMD_IMPORTENV
/*
* env import [-d] [-t [-r] | -b | -c] addr [size] [var ...]
* -d: delete existing environment before importing if no var is
* passed; if vars are passed, if one var is in the current
* environment but not in the environment at addr, delete var from
* current environment;
* otherwise overwrite / append to existing definitions
* -t: assume text format; either "size" must be given or the
* text data must be '\0' terminated
* -r: handle CRLF like LF, that means exported variables with
* a content which ends with \r won't get imported. Used
* to import text files created with editors which are using CRLF
* for line endings. Only effective in addition to -t.
* -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
* if var is set and size should be missing (i.e. '\0'
* termination), set size to '-'
* var... List of the names of the only variables that get imported from
* the environment at address 'addr'. Without arguments, the whole
* environment gets imported.
*/
static int do_env_import(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
ulong addr;
char *cmd, *ptr;
char sep = '\n';
int chk = 0;
int fmt = 0;
int del = 0;
int crlf_is_lf = 0;
int wl = 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 'r': /* handle CRLF like LF */
crlf_is_lf = 1;
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");
if (sep != '\n' && crlf_is_lf )
crlf_is_lf = 0;
addr = hextoul(argv[0], NULL);
ptr = map_sysmem(addr, 0);
if (argc >= 2 && strcmp(argv[1], "-")) {
size = hextoul(argv[1], NULL);
} else if (chk) {
puts("## Error: external checksum format must pass size\n");
return CMD_RET_FAILURE;
} else {
char *s = ptr;
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 (argc > 2)
wl = 1;
if (chk) {
uint32_t crc;
env_t *ep = (env_t *)ptr;
if (size <= offsetof(env_t, data)) {
printf("## Error: Invalid size 0x%zX\n", size);
return 1;
}
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;
}
ptr = (char *)ep->data;
}
if (!himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR,
crlf_is_lf, wl ? argc - 2 : 0, wl ? &argv[2] : NULL)) {
pr_err("## 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_NVEDIT_INDIRECT)
static int do_env_indirect(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
char *to = argv[1];
char *from = argv[2];
char *default_value = NULL;
int ret = 0;
char *val;
if (argc < 3 || argc > 4) {
return CMD_RET_USAGE;
}
if (argc == 4) {
default_value = argv[3];
}
val = env_get(from) ?: default_value;
if (!val) {
printf("## env indirect: Environment variable for <from> (%s) does not exist.\n", from);
return CMD_RET_FAILURE;
}
ret = env_set(to, val);
if (ret == 0) {
return CMD_RET_SUCCESS;
}
else {
return CMD_RET_FAILURE;
}
}
#endif
#if defined(CONFIG_CMD_NVEDIT_INFO)
/*
* print_env_info - print environment information
*/
static int print_env_info(void)
{
const char *value;
/* print environment validity value */
switch (gd->env_valid) {
case ENV_INVALID:
value = "invalid";
break;
case ENV_VALID:
value = "valid";
break;
case ENV_REDUND:
value = "redundant";
break;
default:
value = "unknown";
break;
}
printf("env_valid = %s\n", value);
/* print environment ready flag */
value = gd->flags & GD_FLG_ENV_READY ? "true" : "false";
printf("env_ready = %s\n", value);
/* print environment using default flag */
value = gd->flags & GD_FLG_ENV_DEFAULT ? "true" : "false";
printf("env_use_default = %s\n", value);
return CMD_RET_SUCCESS;
}
#define ENV_INFO_IS_DEFAULT BIT(0) /* default environment bit mask */
#define ENV_INFO_IS_PERSISTED BIT(1) /* environment persistence bit mask */
/*
* env info - display environment information
* env info [-d] - evaluate whether default environment is used
* env info [-p] - evaluate whether environment can be persisted
* Add [-q] - quiet mode, use only for command result, for test by example:
* test env info -p -d -q
*/
static int do_env_info(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
int eval_flags = 0;
int eval_results = 0;
bool quiet = false;
#if defined(CONFIG_CMD_SAVEENV) && !IS_ENABLED(CONFIG_ENV_IS_DEFAULT)
enum env_location loc;
#endif
/* display environment information */
if (argc <= 1)
return print_env_info();
/* process options */
while (--argc > 0 && **++argv == '-') {
char *arg = *argv;
while (*++arg) {
switch (*arg) {
case 'd':
eval_flags |= ENV_INFO_IS_DEFAULT;
break;
case 'p':
eval_flags |= ENV_INFO_IS_PERSISTED;
break;
case 'q':
quiet = true;
break;
default:
return CMD_RET_USAGE;
}
}
}
/* evaluate whether default environment is used */
if (eval_flags & ENV_INFO_IS_DEFAULT) {
if (gd->flags & GD_FLG_ENV_DEFAULT) {
if (!quiet)
printf("Default environment is used\n");
eval_results |= ENV_INFO_IS_DEFAULT;
} else {
if (!quiet)
printf("Environment was loaded from persistent storage\n");
}
}
/* evaluate whether environment can be persisted */
if (eval_flags & ENV_INFO_IS_PERSISTED) {
#if defined(CONFIG_CMD_SAVEENV) && !IS_ENABLED(CONFIG_ENV_IS_DEFAULT)
loc = env_get_location(ENVOP_SAVE, gd->env_load_prio);
if (ENVL_NOWHERE != loc && ENVL_UNKNOWN != loc) {
if (!quiet)
printf("Environment can be persisted\n");
eval_results |= ENV_INFO_IS_PERSISTED;
} else {
if (!quiet)
printf("Environment cannot be persisted\n");
}
#else
if (!quiet)
printf("Environment cannot be persisted\n");
#endif
}
/* The result of evaluations is combined with AND */
if (eval_flags != eval_results)
return CMD_RET_FAILURE;
return CMD_RET_SUCCESS;
}
#endif
#if defined(CONFIG_CMD_ENV_EXISTS)
static int do_env_exists(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct env_entry e, *ep;
if (argc < 2)
return CMD_RET_USAGE;
e.key = argv[1];
e.data = NULL;
hsearch_r(e, ENV_FIND, &ep, &env_htab, 0);
return (ep == NULL) ? 1 : 0;
}
#endif
/*
* New command line interface: "env" command with subcommands
*/
static struct cmd_tbl 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
#if defined(CONFIG_CMD_NVEDIT_INDIRECT)
U_BOOT_CMD_MKENT(indirect, 3, 0, do_env_indirect, "", ""),
#endif
#if defined(CONFIG_CMD_NVEDIT_INFO)
U_BOOT_CMD_MKENT(info, 3, 0, do_env_info, "", ""),
#endif
#if defined(CONFIG_CMD_NVEDIT_LOAD)
U_BOOT_CMD_MKENT(load, 1, 0, do_env_load, "", ""),
#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) && !IS_ENABLED(CONFIG_ENV_IS_DEFAULT)
U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
#if defined(CONFIG_CMD_ERASEENV)
U_BOOT_CMD_MKENT(erase, 1, 0, do_env_erase, "", ""),
#endif
#endif
#if defined(CONFIG_CMD_NVEDIT_SELECT)
U_BOOT_CMD_MKENT(select, 2, 0, do_env_select, "", ""),
#endif
U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
#if defined(CONFIG_CMD_ENV_EXISTS)
U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
#endif
};
static int do_env(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
struct cmd_tbl *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;
}
U_BOOT_LONGHELP(env,
#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_ENV_EXISTS)
"env exists name - tests for existence of 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 [-r] | -b | -c] addr [size] [var ...] - import environment\n"
#endif
#if defined(CONFIG_CMD_NVEDIT_INDIRECT)
"env indirect <to> <from> [default] - sets <to> to the value of <from>, using [default] when unset\n"
#endif
#if defined(CONFIG_CMD_NVEDIT_INFO)
"env info - display environment information\n"
"env info [-d] [-p] [-q] - evaluate environment information\n"
" \"-d\": default environment is used\n"
" \"-p\": environment can be persisted\n"
" \"-q\": quiet output\n"
#endif
"env print [-a | name ...] - print environment\n"
#if defined(CONFIG_CMD_NVEDIT_EFI)
"env print -e [-guid guid] [-n] [name ...] - print UEFI environment\n"
#endif
#if defined(CONFIG_CMD_RUN)
"env run var [...] - run commands in an environment variable\n"
#endif
#if defined(CONFIG_CMD_SAVEENV) && !IS_ENABLED(CONFIG_ENV_IS_DEFAULT)
"env save - save environment\n"
#if defined(CONFIG_CMD_ERASEENV)
"env erase - erase environment\n"
#endif
#endif
#if defined(CONFIG_CMD_NVEDIT_LOAD)
"env load - load environment\n"
#endif
#if defined(CONFIG_CMD_NVEDIT_SELECT)
"env select [target] - select environment target\n"
#endif
#if defined(CONFIG_CMD_NVEDIT_EFI)
"env set -e [-nv][-bs][-rt][-at][-a][-i addr:size][-v] name [arg ...]\n"
" - set UEFI variable; unset if '-i' or 'arg' not specified\n"
#endif
"env set [-f] name [arg ...]\n");
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"
#if defined(CONFIG_CMD_NVEDIT_EFI)
"printenv -e [-guid guid][-n] [name ...]\n"
" - print UEFI variable 'name' or all the variables\n"
" \"-guid\": GUID xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx\n"
" \"-n\": suppress dumping variable's value\n"
#endif
"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",
#if defined(CONFIG_CMD_NVEDIT_EFI)
"-e [-guid guid][-nv][-bs][-rt][-at][-a][-v]\n"
" [-i addr:size name], or [name [value ...]]\n"
" - set UEFI variable 'name' to 'value' ...'\n"
" \"-guid\": GUID xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx\n"
" \"-nv\": set non-volatile attribute\n"
" \"-bs\": set boot-service attribute\n"
" \"-rt\": set runtime attribute\n"
" \"-at\": set time-based authentication attribute\n"
" \"-a\": append-write\n"
" \"-i addr,size\": use <addr,size> as variable's value\n"
" \"-v\": verbose message\n"
" - delete UEFI variable 'name' if 'value' not specified\n"
#endif
"setenv [-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 */
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