#if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
!defined(CONFIG_ENV_IS_IN_FLASH) && \
!defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
- !defined(CONFIG_ENV_IS_IN_MG_DISK) && \
!defined(CONFIG_ENV_IS_IN_MMC) && \
!defined(CONFIG_ENV_IS_IN_FAT) && \
!defined(CONFIG_ENV_IS_IN_NAND) && \
!defined(CONFIG_ENV_IS_IN_REMOTE) && \
!defined(CONFIG_ENV_IS_NOWHERE)
# error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
-SPI_FLASH|MG_DISK|NVRAM|MMC|FAT|REMOTE} or CONFIG_ENV_IS_NOWHERE
+SPI_FLASH|NVRAM|MMC|FAT|REMOTE} or CONFIG_ENV_IS_NOWHERE
#endif
#define XMK_STR(x) #x
#endif
/*
- * Set a new environment variable,
- * or replace or delete an existing one.
+ * Perform consistency checking before setting, replacing, or deleting an
+ * environment variable, then (if successful) apply the changes to internals so
+ * to make them effective. Code for this function was taken out of
+ * _do_env_set(), which now calls it instead.
+ * Returns 0 in case of success, 1 in case of failure.
+ * When (flag & H_FORCE) is set, do not print out any error message and force
+ * overwriting of write-once variables.
*/
-int _do_env_set(int flag, int argc, char * const argv[])
+
+int env_check_apply(const char *name, const char *oldval,
+ const char *newval, int flag)
{
- bd_t *bd = gd->bd;
int i, len;
+ bd_t *bd = gd->bd;
int console = -1;
- char *name, *value, *s;
- ENTRY e, *ep;
-
- name = argv[1];
-
- if (strchr(name, '=')) {
- printf("## Error: illegal character '=' in variable name"
- "\"%s\"\n", name);
- return 1;
- }
-
- env_id++;
- /*
- * search if variable with this name already exists
- */
- e.key = name;
- e.data = NULL;
- hsearch_r(e, FIND, &ep, &env_htab);
/* Check for console redirection */
if (strcmp(name, "stdin") == 0)
console = stderr;
if (console != -1) {
- if (argc < 3) { /* Cannot delete it! */
- printf("Can't delete \"%s\"\n", name);
+ if ((newval == NULL) || (*newval == '\0')) {
+ /* We cannot delete stdin/stdout/stderr */
+ if ((flag & H_FORCE) == 0)
+ printf("Can't delete \"%s\"\n", name);
return 1;
}
#ifdef CONFIG_CONSOLE_MUX
- i = iomux_doenv(console, argv[2]);
+ i = iomux_doenv(console, newval);
if (i)
return i;
#else
/* Try assigning specified device */
- if (console_assign(console, argv[2]) < 0)
+ if (console_assign(console, newval) < 0)
return 1;
#ifdef CONFIG_SERIAL_MULTI
- if (serial_assign(argv[2]) < 0)
+ if (serial_assign(newval) < 0)
return 1;
#endif
#endif /* CONFIG_CONSOLE_MUX */
}
/*
- * Some variables like "ethaddr" and "serial#" can be set only
- * once and cannot be deleted; also, "ver" is readonly.
+ * Some variables like "ethaddr" and "serial#" can be set only once and
+ * cannot be deleted, unless CONFIG_ENV_OVERWRITE is defined.
*/
- if (ep) { /* variable exists */
#ifndef CONFIG_ENV_OVERWRITE
+ if (oldval != NULL && /* variable exists */
+ (flag & H_FORCE) == 0) { /* and we are not forced */
if (strcmp(name, "serial#") == 0 ||
(strcmp(name, "ethaddr") == 0
#if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
- && strcmp(ep->data, MK_STR(CONFIG_ETHADDR)) != 0
+ && strcmp(oldval, MK_STR(CONFIG_ETHADDR)) != 0
#endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
)) {
printf("Can't overwrite \"%s\"\n", name);
return 1;
}
+ }
#endif
+ /*
+ * When we change baudrate, or we are doing an env default -a
+ * (which will erase all variables prior to calling this),
+ * we want the baudrate to actually change - for real.
+ */
+ if (oldval != NULL || /* variable exists */
+ (flag & H_NOCLEAR) == 0) { /* or env is clear */
/*
* Switch to new baudrate if new baudrate is supported
*/
if (strcmp(name, "baudrate") == 0) {
- int baudrate = simple_strtoul(argv[2], NULL, 10);
+ int baudrate = simple_strtoul(newval, NULL, 10);
int i;
for (i = 0; i < N_BAUDRATES; ++i) {
if (baudrate == baudrate_table[i])
break;
}
if (i == N_BAUDRATES) {
- printf("## Baudrate %d bps not supported\n",
- baudrate);
+ if ((flag & H_FORCE) == 0)
+ printf("## Baudrate %d bps not "
+ "supported\n", baudrate);
return 1;
}
+ if (gd->baudrate == baudrate) {
+ /* If unchanged, we just say it's OK */
+ return 0;
+ }
printf("## Switch baudrate to %d bps and"
- "press ENTER ...\n", baudrate);
+ "press ENTER ...\n", baudrate);
udelay(50000);
gd->baudrate = baudrate;
#if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
}
}
+ /*
+ * Some variables should be updated when the corresponding
+ * entry in the environment is changed
+ */
+ if (strcmp(name, "ipaddr") == 0) {
+ const char *s = newval;
+ char *e;
+ unsigned long addr;
+ bd->bi_ip_addr = 0;
+ for (addr = 0, i = 0; i < 4; ++i) {
+ ulong val = s ? simple_strtoul(s, &e, 10) : 0;
+ addr <<= 8;
+ addr |= val & 0xFF;
+ if (s)
+ s = *e ? e + 1 : e;
+ }
+ bd->bi_ip_addr = htonl(addr);
+ return 0;
+ } else if (strcmp(name, "loadaddr") == 0) {
+ load_addr = simple_strtoul(newval, NULL, 16);
+ return 0;
+ }
+#if defined(CONFIG_CMD_NET)
+ else if (strcmp(name, "bootfile") == 0) {
+ copy_filename(BootFile, newval, sizeof(BootFile));
+ return 0;
+ }
+#endif
+ return 0;
+}
+
+/*
+ * Set a new environment variable,
+ * or replace or delete an existing one.
+*/
+int _do_env_set(int flag, int argc, char * const argv[])
+{
+ int i, len;
+ char *name, *value, *s;
+ ENTRY e, *ep;
+
+ name = argv[1];
+ value = argv[2];
+
+ if (strchr(name, '=')) {
+ printf("## Error: illegal character '='"
+ "in variable name \"%s\"\n", name);
+ return 1;
+ }
+
+ env_id++;
+ /*
+ * search if variable with this name already exists
+ */
+ e.key = name;
+ e.data = NULL;
+ hsearch_r(e, FIND, &ep, &env_htab);
+
+ /*
+ * Perform requested checks. Notice how since we are overwriting
+ * a single variable, we need to set H_NOCLEAR
+ */
+ if (env_check_apply(name, ep ? ep->data : NULL, value, H_NOCLEAR)) {
+ debug("check function did not approve, refusing\n");
+ return 1;
+ }
+
/* Delete only ? */
if (argc < 3 || argv[2] == NULL) {
int rc = hdelete_r(name, &env_htab);
return 1;
}
- /*
- * Some variables should be updated when the corresponding
- * entry in the environment is changed
- */
- if (strcmp(argv[1], "loadaddr") == 0) {
- load_addr = simple_strtoul(argv[2], NULL, 16);
- return 0;
- }
-#if defined(CONFIG_CMD_NET)
- else if (strcmp(argv[1], "bootfile") == 0) {
- copy_filename(BootFile, argv[2], sizeof(BootFile));
- return 0;
- }
-#endif
return 0;
}
addr = (char *)ep->data;
}
- if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR) == 0) {
+ 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;
}
projects / u-boot / blobdiff