This is useful for allowing scripts to read environment variables from
file, among other things.
This is a slightly modified version of what Alessandro submitted to the
mailing list last July:
http://www.mail-archive.com/u-boot-us...@lists.sourceforge.net/msg07932.html
I changed the name from 'setenvram' to 'ramenv' to prevent breakage of scripts
that use the abbreviation 'set' (which my handss have the habit of doing).
Signed-off-by: Eric Nelson <eric.nel...@boundarydevices.com>
---
common/cmd_nvedit.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 46 insertions(+), 0 deletions(-)
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 1fcb4c9..bcb6d9f 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -494,6 +494,44 @@ int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char
*argv[])
#endif
/************************************************************************
+ * Set a new environment variable from RAM.
+ * Requires three arguments: the variable name, a memory address and a length.
+ *
+ * Deletes the environment variable if the length is zero.
+ */
+int do_ramenv(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ unsigned long len, i;
+ char *addr;
+
+ if (argc != 4) {
+ cmd_usage(cmdtp);
+ return 1;
+ }
+ addr = (char *)simple_strtol(argv[2], NULL, 16);
+ len = simple_strtol(argv[3], NULL, 16);
+ if (!addr || !len) {
+ cmd_usage(cmdtp);
+ return 1;
+ }
+ addr[len] = '\0';
+ for (i = 0; i < len; i++) {
+ /* turn newlines into semicolon */
+ if (addr[i] == '\n')
+ addr[i] = ';'; /* ignore dos-style newlines */
+ if (addr[i] == '\r')
+ addr[i] = ' '; /* accept sh-comments and discard them */
+ if (addr[i] == '#') {
+ while (addr[i] && addr[i] != '\n')
+ addr[i++] = ' ';
+ i--;
+ }
+ }
+ setenv(argv[1], addr);
+ return 0;
+}
+
+/************************************************************************
* Look up variable from environment,
* return address of storage for that variable,
* or NULL if not found
@@ -605,6 +643,14 @@ U_BOOT_CMD(
" - delete environment variable 'name'\n"
);
+U_BOOT_CMD(
+ ramenv, 4, 0, do_ramenv,
+ "ramenv - get environment variable from ram\n",
+ "name addr maxlen\n"
+ " - set environment variable 'name' from addr 'addr'\n"
+ " - delete environment variable if maxlen is 0\n"
+);
+
#if defined(CONFIG_CMD_ASKENV)
U_BOOT_CMD(
--
1.5.5.1.382.g182fb
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