From: Yousong Zhou <yszhou4tech@gmail.com>
Date: Wed, 12 Nov 2014 13:59:22 +0000 (+0800)
Subject: json_script: fix eval_string().
X-Git-Url: http://git.openwrt.org/?p=project%2Flibubox.git;a=commitdiff_plain;h=30e6cca9396f770f3387fff8bef0a6645571c46c

json_script: fix eval_string().

- Fix handling of "%%".
 - Fix length requirement when calling blobmsg_realloc_string_buffer().

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
---

diff --git a/json_script.c b/json_script.c
index 0ec7b38..8e7f526 100644
--- a/json_script.c
+++ b/json_script.c
@@ -416,7 +416,7 @@ static int eval_string(struct json_call *call, struct blob_buf *buf, const char
 		}
 
 		if (cur_var) {
-			if (next > str) {
+			if (end > str) {
 				cur = msg_find_var(call, str);
 				if (!cur)
 					continue;
@@ -434,7 +434,7 @@ static int eval_string(struct json_call *call, struct blob_buf *buf, const char
 			cur_len = end - str;
 		}
 
-		dest = blobmsg_realloc_string_buffer(buf, cur_len + 1);
+		dest = blobmsg_realloc_string_buffer(buf, len + cur_len + 1);
 		memcpy(dest + len, cur, cur_len);
 		len += cur_len;
 	}