From ac2c734583fdaddeebdbb2a168b0f643b2dbaa2b Mon Sep 17 00:00:00 2001
From: geniusgogo <xpxyr@sina.com>
Date: Fri, 7 May 2021 14:53:48 +0800
Subject: [PATCH] fixed rt_kprintf %s precision print error.

---
 src/kservice.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/kservice.c b/src/kservice.c
index e9972dba97..7ed05b6651 100644
--- a/src/kservice.c
+++ b/src/kservice.c
@@ -922,7 +922,7 @@ rt_int32_t rt_vsnprintf(char       *buf,
             s = va_arg(args, char *);
             if (!s) s = "(NULL)";
 
-            len = rt_strlen(s);
+            for (len = 0; (len != field_width) && (s[len] != '\0'); len++);
 #ifdef RT_PRINTF_PRECISION
             if (precision > 0 && len > precision) len = precision;
 #endif
-- 
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