Add 'editenv' command
The editenv command can be used to edit an environment variable.
Editing an environment variable is useful when one wants to tweak an
existing variable, for example fix a typo or change the baudrate in the
'bootargs' environment variable.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 725e573..eb89e9e 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -42,6 +42,9 @@
#include <common.h>
#include <command.h>
#include <environment.h>
+#if defined(CONFIG_CMD_EDITENV)
+#include <malloc.h>
+#endif
#include <watchdog.h>
#include <serial.h>
#include <linux/stddef.h>
@@ -503,6 +506,34 @@
#endif
/************************************************************************
+ * Interactively edit an environment variable
+ */
+#if defined(CONFIG_CMD_EDITENV)
+int do_editenv(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ char buffer[CONFIG_SYS_CBSIZE];
+ char *init_val;
+ int len;
+
+ if (argc < 2) {
+ cmd_usage(cmdtp);
+ return 1;
+ }
+
+ /* Set read buffer to initial value or empty sting */
+ init_val = getenv(argv[1]);
+ if (init_val)
+ len = sprintf(buffer, "%s", init_val);
+ else
+ buffer[0] = '\0';
+
+ readline_into_buffer("edit: ", buffer);
+
+ return setenv(argv[1], buffer);
+}
+#endif /* CONFIG_CMD_EDITENV */
+
+/************************************************************************
* Look up variable from environment,
* return address of storage for that variable,
* or NULL if not found
@@ -597,6 +628,15 @@
/**************************************************/
+#if defined(CONFIG_CMD_EDITENV)
+U_BOOT_CMD(
+ editenv, 2, 0, do_editenv,
+ "edit environment variable",
+ "name\n"
+ " - edit environment variable 'name'"
+);
+#endif
+
U_BOOT_CMD(
printenv, CONFIG_SYS_MAXARGS, 1, do_printenv,
"print environment variables",