SAMSUNG: serial: modify name from s5pc1xx to s5p

[karo-tx-uboot.git] / common / cmd_nvedit.c

diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 9f8d5319596d2a171f55035683c1eca61af21d11..eb89e9e60a669464f9d7ed669e0b5c047647931f 100644 (file)
--- 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>
@@ -400,7 +403,7 @@ int _do_setenv (int flag, int argc, char *argv[])
 int setenv (char *varname, char *varvalue)
 {
        char *argv[4] = { "setenv", varname, varvalue, NULL };
-       if (varvalue == NULL)
+       if ((varvalue == NULL) || (varvalue[0] == '\0'))
                return _do_setenv (0, 2, argv);
        else
                return _do_setenv (0, 3, argv);
@@ -502,6 +505,34 @@ int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 }
 #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,
@@ -597,6 +628,15 @@ int envmatch (uchar *s1, int i2)
 
 /**************************************************/
 
+#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",