This patch allows the U-Boot user space companion utility, fw_setenv,
to overwrite the 'ethaddr' key/value pair if the current value is set
to a per-board-configured default.
This change allows 'fw_setenv' to match the behavior of 'setenv' /
'env set' on the U-Boot command line.
Signed-off-by: Grant Erickson <maratho...@gmail.com>
---
tools/env/fw_env.c | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c
index 996682e..2185be9 100644
--- a/tools/env/fw_env.c
+++ b/tools/env/fw_env.c
@@ -45,6 +45,8 @@
#include "fw_env.h"
+#include <config.h>
+
#define WHITESPACE(c) ((c == '\t') || (c == ' '))
#define min(x, y) ({ \
@@ -390,15 +392,23 @@ int fw_env_write(char *name, char *value)
* Delete any existing definition
*/
if (oldval) {
+#ifndef CONFIG_ENV_OVERWRITE
+
/*
* Ethernet Address and serial# can be set only once
*/
- if ((strcmp (name, "ethaddr") == 0) ||
- (strcmp (name, "serial#") == 0)) {
+ if (
+ (strcmp(name, "serial#") == 0) ||
+ ((strcmp(name, "ethaddr") == 0)
+#if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
+ && (strcmp(oldval, MK_STR(CONFIG_ETHADDR)) != 0)
+#endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
+ ) ) {
fprintf (stderr, "Can't overwrite \"%s\"\n", name);
errno = EROFS;
return -1;
}
+#endif /* CONFIG_ENV_OVERWRITE */
if (*++nxt == '\0') {
*env = '\0';
--
1.7.7.3
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