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![Pierre Aubert](/assets/img/avatar_default.png)
The env export command doesn't export the first variable of the list
since commit 5a31ea04c9
"env grep" - reimplement command using hexport_r()
Signed-off-by: Pierre Aubert <p.aubert@staubli.com>
1263 lines
29 KiB
C
1263 lines
29 KiB
C
/*
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* (C) Copyright 2000-2013
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Andreas Heppel <aheppel@sysgo.de>
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*
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* Copyright 2011 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/*
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* Support for persistent environment data
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*
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* The "environment" is stored on external storage as a list of '\0'
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* terminated "name=value" strings. The end of the list is marked by
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* a double '\0'. The environment is preceeded by a 32 bit CRC over
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* the data part and, in case of redundant environment, a byte of
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* flags.
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*
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* This linearized representation will also be used before
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* relocation, i. e. as long as we don't have a full C runtime
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* environment. After that, we use a hash table.
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <search.h>
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#include <errno.h>
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#include <malloc.h>
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#include <watchdog.h>
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#include <linux/stddef.h>
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#include <asm/byteorder.h>
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DECLARE_GLOBAL_DATA_PTR;
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#if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
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!defined(CONFIG_ENV_IS_IN_FLASH) && \
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!defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
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!defined(CONFIG_ENV_IS_IN_MMC) && \
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!defined(CONFIG_ENV_IS_IN_FAT) && \
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!defined(CONFIG_ENV_IS_IN_NAND) && \
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!defined(CONFIG_ENV_IS_IN_NVRAM) && \
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!defined(CONFIG_ENV_IS_IN_ONENAND) && \
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!defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
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!defined(CONFIG_ENV_IS_IN_REMOTE) && \
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!defined(CONFIG_ENV_IS_IN_UBI) && \
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!defined(CONFIG_ENV_IS_NOWHERE)
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# error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
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SPI_FLASH|NVRAM|MMC|FAT|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE
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#endif
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/*
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* Maximum expected input data size for import command
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*/
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#define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
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/*
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* This variable is incremented on each do_env_set(), so it can
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* be used via get_env_id() as an indication, if the environment
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* has changed or not. So it is possible to reread an environment
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* variable only if the environment was changed ... done so for
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* example in NetInitLoop()
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*/
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static int env_id = 1;
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int get_env_id(void)
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{
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return env_id;
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}
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#ifndef CONFIG_SPL_BUILD
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/*
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* Command interface: print one or all environment variables
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*
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* Returns 0 in case of error, or length of printed string
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*/
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static int env_print(char *name, int flag)
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{
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char *res = NULL;
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ssize_t len;
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if (name) { /* print a single name */
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ENTRY e, *ep;
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e.key = name;
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e.data = NULL;
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hsearch_r(e, FIND, &ep, &env_htab, flag);
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if (ep == NULL)
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return 0;
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len = printf("%s=%s\n", ep->key, ep->data);
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return len;
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}
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/* print whole list */
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len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL);
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if (len > 0) {
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puts(res);
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free(res);
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return len;
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}
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/* should never happen */
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printf("## Error: cannot export environment\n");
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return 0;
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}
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static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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int i;
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int rcode = 0;
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int env_flag = H_HIDE_DOT;
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if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
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argc--;
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argv++;
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env_flag &= ~H_HIDE_DOT;
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}
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if (argc == 1) {
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/* print all env vars */
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rcode = env_print(NULL, env_flag);
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if (!rcode)
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return 1;
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printf("\nEnvironment size: %d/%ld bytes\n",
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rcode, (ulong)ENV_SIZE);
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return 0;
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}
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/* print selected env vars */
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env_flag &= ~H_HIDE_DOT;
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for (i = 1; i < argc; ++i) {
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int rc = env_print(argv[i], env_flag);
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if (!rc) {
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printf("## Error: \"%s\" not defined\n", argv[i]);
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++rcode;
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}
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}
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return rcode;
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}
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#ifdef CONFIG_CMD_GREPENV
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static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
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int argc, char * const argv[])
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{
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char *res = NULL;
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int len, grep_how, grep_what;
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if (argc < 2)
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return CMD_RET_USAGE;
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grep_how = H_MATCH_SUBSTR; /* default: substring search */
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grep_what = H_MATCH_BOTH; /* default: grep names and values */
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while (--argc > 0 && **++argv == '-') {
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char *arg = *argv;
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while (*++arg) {
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switch (*arg) {
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#ifdef CONFIG_REGEX
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case 'e': /* use regex matching */
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grep_how = H_MATCH_REGEX;
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break;
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#endif
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case 'n': /* grep for name */
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grep_what = H_MATCH_KEY;
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break;
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case 'v': /* grep for value */
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grep_what = H_MATCH_DATA;
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break;
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case 'b': /* grep for both */
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grep_what = H_MATCH_BOTH;
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break;
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case '-':
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goto DONE;
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default:
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return CMD_RET_USAGE;
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}
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}
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}
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DONE:
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len = hexport_r(&env_htab, '\n',
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flag | grep_what | grep_how,
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&res, 0, argc, argv);
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if (len > 0) {
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puts(res);
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free(res);
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}
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if (len < 2)
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return 1;
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return 0;
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}
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#endif
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#endif /* CONFIG_SPL_BUILD */
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/*
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* Set a new environment variable,
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* or replace or delete an existing one.
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*/
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static int _do_env_set(int flag, int argc, char * const argv[])
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{
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int i, len;
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char *name, *value, *s;
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ENTRY e, *ep;
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int env_flag = H_INTERACTIVE;
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debug("Initial value for argc=%d\n", argc);
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while (argc > 1 && **(argv + 1) == '-') {
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char *arg = *++argv;
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--argc;
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while (*++arg) {
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switch (*arg) {
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case 'f': /* force */
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env_flag |= H_FORCE;
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break;
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default:
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return CMD_RET_USAGE;
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}
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}
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}
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debug("Final value for argc=%d\n", argc);
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name = argv[1];
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value = argv[2];
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if (strchr(name, '=')) {
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printf("## Error: illegal character '='"
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"in variable name \"%s\"\n", name);
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return 1;
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}
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env_id++;
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/* Delete only ? */
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if (argc < 3 || argv[2] == NULL) {
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int rc = hdelete_r(name, &env_htab, env_flag);
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return !rc;
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}
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/*
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* Insert / replace new value
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*/
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for (i = 2, len = 0; i < argc; ++i)
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len += strlen(argv[i]) + 1;
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value = malloc(len);
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if (value == NULL) {
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printf("## Can't malloc %d bytes\n", len);
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return 1;
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}
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for (i = 2, s = value; i < argc; ++i) {
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char *v = argv[i];
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while ((*s++ = *v++) != '\0')
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;
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*(s - 1) = ' ';
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}
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if (s != value)
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*--s = '\0';
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e.key = name;
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e.data = value;
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hsearch_r(e, ENTER, &ep, &env_htab, env_flag);
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free(value);
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if (!ep) {
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printf("## Error inserting \"%s\" variable, errno=%d\n",
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name, errno);
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return 1;
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}
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return 0;
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}
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int setenv(const char *varname, const char *varvalue)
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{
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const char * const argv[4] = { "setenv", varname, varvalue, NULL };
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/* before import into hashtable */
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if (!(gd->flags & GD_FLG_ENV_READY))
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return 1;
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if (varvalue == NULL || varvalue[0] == '\0')
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return _do_env_set(0, 2, (char * const *)argv);
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else
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return _do_env_set(0, 3, (char * const *)argv);
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}
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/**
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* Set an environment variable to an integer value
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*
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* @param varname Environment variable to set
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* @param value Value to set it to
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* @return 0 if ok, 1 on error
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*/
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int setenv_ulong(const char *varname, ulong value)
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{
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/* TODO: this should be unsigned */
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char *str = simple_itoa(value);
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return setenv(varname, str);
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}
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/**
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* Set an environment variable to an value in hex
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*
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* @param varname Environment variable to set
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* @param value Value to set it to
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* @return 0 if ok, 1 on error
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*/
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int setenv_hex(const char *varname, ulong value)
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{
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char str[17];
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sprintf(str, "%lx", value);
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return setenv(varname, str);
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}
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ulong getenv_hex(const char *varname, ulong default_val)
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{
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const char *s;
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ulong value;
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char *endp;
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s = getenv(varname);
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if (s)
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value = simple_strtoul(s, &endp, 16);
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if (!s || endp == s)
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return default_val;
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return value;
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}
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#ifndef CONFIG_SPL_BUILD
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static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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if (argc < 2)
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return CMD_RET_USAGE;
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return _do_env_set(flag, argc, argv);
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}
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/*
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* Prompt for environment variable
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*/
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#if defined(CONFIG_CMD_ASKENV)
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int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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char message[CONFIG_SYS_CBSIZE];
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int i, len, pos, size;
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char *local_args[4];
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char *endptr;
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local_args[0] = argv[0];
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local_args[1] = argv[1];
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local_args[2] = NULL;
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local_args[3] = NULL;
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/*
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* Check the syntax:
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*
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* env_ask envname [message1 ...] [size]
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*/
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if (argc == 1)
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return CMD_RET_USAGE;
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/*
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* We test the last argument if it can be converted
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* into a decimal number. If yes, we assume it's
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* the size. Otherwise we echo it as part of the
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* message.
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*/
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i = simple_strtoul(argv[argc - 1], &endptr, 10);
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if (*endptr != '\0') { /* no size */
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size = CONFIG_SYS_CBSIZE - 1;
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} else { /* size given */
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size = i;
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--argc;
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}
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if (argc <= 2) {
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sprintf(message, "Please enter '%s': ", argv[1]);
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} else {
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/* env_ask envname message1 ... messagen [size] */
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for (i = 2, pos = 0; i < argc; i++) {
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if (pos)
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message[pos++] = ' ';
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strcpy(message + pos, argv[i]);
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pos += strlen(argv[i]);
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}
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message[pos++] = ' ';
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message[pos] = '\0';
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}
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if (size >= CONFIG_SYS_CBSIZE)
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size = CONFIG_SYS_CBSIZE - 1;
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if (size <= 0)
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return 1;
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/* prompt for input */
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len = readline(message);
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if (size < len)
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console_buffer[size] = '\0';
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len = 2;
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if (console_buffer[0] != '\0') {
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local_args[2] = console_buffer;
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len = 3;
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}
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/* Continue calling setenv code */
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return _do_env_set(flag, len, local_args);
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}
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#endif
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#if defined(CONFIG_CMD_ENV_CALLBACK)
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static int print_static_binding(const char *var_name, const char *callback_name)
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{
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printf("\t%-20s %-20s\n", var_name, callback_name);
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return 0;
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}
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static int print_active_callback(ENTRY *entry)
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{
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struct env_clbk_tbl *clbkp;
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int i;
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int num_callbacks;
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if (entry->callback == NULL)
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return 0;
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/* look up the callback in the linker-list */
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num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
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for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
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i < num_callbacks;
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i++, clbkp++) {
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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if (entry->callback == clbkp->callback + gd->reloc_off)
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#else
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if (entry->callback == clbkp->callback)
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#endif
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break;
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}
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if (i == num_callbacks)
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/* this should probably never happen, but just in case... */
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printf("\t%-20s %p\n", entry->key, entry->callback);
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else
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printf("\t%-20s %-20s\n", entry->key, clbkp->name);
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return 0;
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}
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/*
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* Print the callbacks available and what they are bound to
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*/
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int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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struct env_clbk_tbl *clbkp;
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int i;
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int num_callbacks;
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/* Print the available callbacks */
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puts("Available callbacks:\n");
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puts("\tCallback Name\n");
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puts("\t-------------\n");
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num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
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for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
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i < num_callbacks;
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i++, clbkp++)
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printf("\t%s\n", clbkp->name);
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puts("\n");
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/* Print the static bindings that may exist */
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puts("Static callback bindings:\n");
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printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
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printf("\t%-20s %-20s\n", "-------------", "-------------");
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env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding);
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puts("\n");
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/* walk through each variable and print the callback if it has one */
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puts("Active callback bindings:\n");
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printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
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printf("\t%-20s %-20s\n", "-------------", "-------------");
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hwalk_r(&env_htab, print_active_callback);
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return 0;
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}
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#endif
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#if defined(CONFIG_CMD_ENV_FLAGS)
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static int print_static_flags(const char *var_name, const char *flags)
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{
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enum env_flags_vartype type = env_flags_parse_vartype(flags);
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enum env_flags_varaccess access = env_flags_parse_varaccess(flags);
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printf("\t%-20s %-20s %-20s\n", var_name,
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env_flags_get_vartype_name(type),
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env_flags_get_varaccess_name(access));
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return 0;
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}
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|
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static int print_active_flags(ENTRY *entry)
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{
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enum env_flags_vartype type;
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enum env_flags_varaccess access;
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if (entry->flags == 0)
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return 0;
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type = (enum env_flags_vartype)
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(entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK);
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access = env_flags_parse_varaccess_from_binflags(entry->flags);
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printf("\t%-20s %-20s %-20s\n", entry->key,
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env_flags_get_vartype_name(type),
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env_flags_get_varaccess_name(access));
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return 0;
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}
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/*
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* Print the flags available and what variables have flags
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*/
|
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int do_env_flags(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
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{
|
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/* Print the available variable types */
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printf("Available variable type flags (position %d):\n",
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ENV_FLAGS_VARTYPE_LOC);
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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);
|
|
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(cmd_tbl_t *cmdtp, int flag, int argc,
|
|
char * const argv[])
|
|
{
|
|
char buffer[CONFIG_SYS_CBSIZE];
|
|
char *init_val;
|
|
|
|
if (argc < 2)
|
|
return CMD_RET_USAGE;
|
|
|
|
/* Set read buffer to initial value or empty sting */
|
|
init_val = getenv(argv[1]);
|
|
if (init_val)
|
|
sprintf(buffer, "%s", init_val);
|
|
else
|
|
buffer[0] = '\0';
|
|
|
|
if (readline_into_buffer("edit: ", buffer, 0) < 0)
|
|
return 1;
|
|
|
|
return setenv(argv[1], buffer);
|
|
}
|
|
#endif /* CONFIG_CMD_EDITENV */
|
|
#endif /* CONFIG_SPL_BUILD */
|
|
|
|
/*
|
|
* Look up variable from environment,
|
|
* return address of storage for that variable,
|
|
* or NULL if not found
|
|
*/
|
|
char *getenv(const 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, 0);
|
|
|
|
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(const 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;
|
|
}
|
|
|
|
val = envmatch((uchar *)name, i);
|
|
if (val < 0)
|
|
continue;
|
|
|
|
/* found; copy out */
|
|
for (n = 0; n < len; ++n, ++buf) {
|
|
*buf = env_get_char(val++);
|
|
if (*buf == '\0')
|
|
return n;
|
|
}
|
|
|
|
if (n)
|
|
*--buf = '\0';
|
|
|
|
printf("env_buf [%d bytes] too small for value of \"%s\"\n",
|
|
len, name);
|
|
|
|
return n;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Decode the integer value of an environment variable and return it.
|
|
*
|
|
* @param name Name of environemnt variable
|
|
* @param base Number base to use (normally 10, or 16 for hex)
|
|
* @param default_val Default value to return if the variable is not
|
|
* found
|
|
* @return the decoded value, or default_val if not found
|
|
*/
|
|
ulong getenv_ulong(const char *name, int base, ulong default_val)
|
|
{
|
|
/*
|
|
* We can use getenv() here, even before relocation, since the
|
|
* environment variable value is an integer and thus short.
|
|
*/
|
|
const char *str = getenv(name);
|
|
|
|
return str ? simple_strtoul(str, NULL, base) : default_val;
|
|
}
|
|
|
|
#ifndef CONFIG_SPL_BUILD
|
|
#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
|
|
static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
|
|
char * const argv[])
|
|
{
|
|
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
|
|
#endif /* CONFIG_SPL_BUILD */
|
|
|
|
|
|
/*
|
|
* 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 -1.
|
|
*/
|
|
int envmatch(uchar *s1, int i2)
|
|
{
|
|
if (s1 == NULL)
|
|
return -1;
|
|
|
|
while (*s1 == env_get_char(i2++))
|
|
if (*s1++ == '=')
|
|
return i2;
|
|
|
|
if (*s1 == '\0' && env_get_char(i2-1) == '=')
|
|
return i2;
|
|
|
|
return -1;
|
|
}
|
|
|
|
#ifndef CONFIG_SPL_BUILD
|
|
static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
|
|
int argc, char * const argv[])
|
|
{
|
|
int all = 0, flag = 0;
|
|
|
|
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 */
|
|
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 */
|
|
set_default_env("## Resetting to default environment\n");
|
|
return 0;
|
|
}
|
|
if (!all && (argc > 0)) {
|
|
/* Reset individual variables */
|
|
set_default_vars(argc, argv);
|
|
return 0;
|
|
}
|
|
|
|
return cmd_usage(cmdtp);
|
|
}
|
|
|
|
static int do_env_delete(cmd_tbl_t *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 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 = 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 = simple_strtoul(*++argv, NULL, 16);
|
|
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 = (char *)simple_strtoul(argv[0], NULL, 16);
|
|
|
|
if (size)
|
|
memset(addr, '\0', size);
|
|
|
|
argc--;
|
|
argv++;
|
|
|
|
if (sep) { /* export as text file */
|
|
len = hexport_r(&env_htab, sep,
|
|
H_MATCH_KEY | H_MATCH_IDENT,
|
|
&addr, size, argc, argv);
|
|
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',
|
|
H_MATCH_KEY | H_MATCH_IDENT,
|
|
&res, ENV_SIZE, argc, argv);
|
|
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
|
|
}
|
|
setenv_hex("filesize", len + offsetof(env_t, data));
|
|
|
|
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_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
|
|
|
|
#if defined(CONFIG_CMD_ENV_EXISTS)
|
|
static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
|
|
char * const argv[])
|
|
{
|
|
ENTRY e, *ep;
|
|
|
|
if (argc < 2)
|
|
return CMD_RET_USAGE;
|
|
|
|
e.key = argv[1];
|
|
e.data = NULL;
|
|
hsearch_r(e, FIND, &ep, &env_htab, 0);
|
|
|
|
return (ep == NULL) ? 1 : 0;
|
|
}
|
|
#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_CMD_ENV_EXISTS)
|
|
U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
|
|
#endif
|
|
};
|
|
|
|
#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_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 | -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 */
|