| /* |
| * (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 2011-2014 Freescale Semiconductor, Inc. |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| /* |
| * 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 <cli.h> |
| #include <command.h> |
| #include <environment.h> |
| #include <search.h> |
| #include <errno.h> |
| #include <malloc.h> |
| #include <watchdog.h> |
| #include <linux/stddef.h> |
| #include <asm/byteorder.h> |
| #include <asm/io.h> |
| |
| 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_MMC) && \ |
| !defined(CONFIG_ENV_IS_IN_FAT) && \ |
| !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_IN_REMOTE) && \ |
| !defined(CONFIG_ENV_IS_IN_UBI) && \ |
| !defined(CONFIG_ENV_IS_IN_SATA) && \ |
| !defined(CONFIG_ENV_IS_NOWHERE) |
| # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\ |
| SPI_FLASH|NVRAM|MMC|FAT|REMOTE|UBI|SATA} or CONFIG_ENV_IS_NOWHERE |
| #endif |
| |
| /* |
| * 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 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; |
| } |
| |
| #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 */ |
| ENTRY e, *ep; |
| |
| e.key = name; |
| e.data = NULL; |
| hsearch_r(e, 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(cmd_tbl_t *cmdtp, int flag, int argc, |
| char * const argv[]) |
| { |
| int i; |
| int rcode = 0; |
| int env_flag = H_HIDE_DOT; |
| |
| 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(cmd_tbl_t *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 i, len; |
| char *name, *value, *s; |
| ENTRY e, *ep; |
| int env_flag = H_INTERACTIVE; |
| |
| 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); |
| name = argv[1]; |
| value = argv[2]; |
| |
| 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); |
| return !rc; |
| } |
| |
| /* |
| * 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, 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 setenv(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); |
| else |
| return _do_env_set(0, 3, (char * const *)argv); |
| } |
| |
| /** |
| * Set an environment variable to an integer value |
| * |
| * @param varname Environment variable to set |
| * @param value Value to set it to |
| * @return 0 if ok, 1 on error |
| */ |
| int setenv_ulong(const char *varname, ulong value) |
| { |
| /* TODO: this should be unsigned */ |
| char *str = simple_itoa(value); |
| |
| return setenv(varname, str); |
| } |
| |
| /** |
| * Set an environment variable to an value in hex |
| * |
| * @param varname Environment variable to set |
| * @param value Value to set it to |
| * @return 0 if ok, 1 on error |
| */ |
| int setenv_hex(const char *varname, ulong value) |
| { |
| char str[17]; |
| |
| sprintf(str, "%lx", value); |
| return setenv(varname, str); |
| } |
| |
| ulong getenv_hex(const char *varname, ulong default_val) |
| { |
| const char *s; |
| ulong value; |
| char *endp; |
| |
| s = getenv(varname); |
| if (s) |
| value = simple_strtoul(s, &endp, 16); |
| if (!s || endp == s) |
| return default_val; |
| |
| return value; |
| } |
| |
| #ifndef CONFIG_SPL_BUILD |
| static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
| { |
| if (argc < 2) |
| return CMD_RET_USAGE; |
| |
| 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[]) |
| { |
| 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 = simple_strtoul(argv[argc - 1], &endptr, 10); |
| 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; i++) { |
| if (pos) |
| message[pos++] = ' '; |
| |
| strcpy(message + pos, argv[i]); |
| pos += strlen(argv[i]); |
| } |
| message[pos++] = ' '; |
| message[pos] = '\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); |
| } |
| #endif |
| |
| #if defined(CONFIG_CMD_ENV_CALLBACK) |
| static int print_static_binding(const char *var_name, const char *callback_name) |
| { |
| printf("\t%-20s %-20s\n", var_name, callback_name); |
| |
| return 0; |
| } |
| |
| static int print_active_callback(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 defined(CONFIG_NEEDS_MANUAL_RELOC) |
| if (entry->callback == clbkp->callback + gd->reloc_off) |
| #else |
| if (entry->callback == clbkp->callback) |
| #endif |
| 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(cmd_tbl_t *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); |
| 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) |
| { |
| 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(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(cmd_tbl_t *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); |
| 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 (cli_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]; |
| 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 = 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 = simple_strtoul(argv[0], NULL, 16); |
| 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) { |
| error("Cannot export environment: errno = %d\n", errno); |
| return 1; |
| } |
| sprintf(buf, "%zX", (size_t)len); |
| setenv("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) { |
| 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 [-r] | -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 |
| * -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 |
| */ |
| static int do_env_import(cmd_tbl_t *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; |
| 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 = simple_strtoul(argv[0], NULL, 16); |
| ptr = map_sysmem(addr, 0); |
| |
| if (argc == 2) { |
| size = simple_strtoul(argv[1], NULL, 16); |
| } else if (argc == 1 && 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 (chk) { |
| uint32_t crc; |
| env_t *ep = (env_t *)ptr; |
| |
| 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, 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 [-r] | -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 */ |