--- /dev/null
+/*
+ * (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.
+ *
+ * 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 <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_NOWHERE)
+# error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
+SPI_FLASH|NVRAM|MMC|FAT|REMOTE|UBI} 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 = 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 (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 | -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[])
+{
+ ulong addr;
+ char *cmd, *ptr;
+ 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 = 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, 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 */
Code Review / kvmfornfv.git / blobdiff