ratp: implement getenv as a standard ratp command

Also, use xstrndup() instead of the custom xmemdup_add_zero() as we're
working with strings anyway.

Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 51 insertions, 0 deletions

diff --git a/common/ratp/getenv.c b/common/ratp/getenv.c
new file mode 100644
index 0000000000..b409634886
--- /dev/null
+++ b/common/ratp/getenv.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2018 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+/*
+ * RATP getenv
+ */
+
+#include <common.h>
+#include <ratp_bb.h>
+#include <malloc.h>
+#include <environment.h>
+
+static int ratp_cmd_getenv(const struct ratp_bb *req, int req_len,
+			   struct ratp_bb **rsp, int *rsp_len)
+{
+	int dlen = req_len - sizeof (struct ratp_bb);
+	char *varname;
+	const char *value;
+
+	varname = xstrndup ((const char *)req->data, dlen);
+	value = getenv (varname);
+	free (varname);
+
+	dlen = strlen (value);
+
+	*rsp_len = sizeof(struct ratp_bb) + dlen;
+	*rsp = xzalloc(*rsp_len);
+	(*rsp)->type = cpu_to_be16(BB_RATP_TYPE_GETENV_RETURN);
+	memcpy ((*rsp)->data, value, dlen);
+	return 0;
+}
+
+BAREBOX_RATP_CMD_START(GETENV)
+	.request_id = BB_RATP_TYPE_GETENV,
+	.response_id = BB_RATP_TYPE_GETENV_RETURN,
+	.cmd = ratp_cmd_getenv
+BAREBOX_RATP_CMD_END