From: Ben Gras <ben@minix3.org>
Date: Thu, 22 Jul 2010 22:35:44 +0000 (+0000)
Subject: vsprintf: fix special yet useful case for vsprintf where n < 1.
X-Git-Tag: v3.1.8~155
X-Git-Url: http://zhaoyanbai.com/repos/migration-4to9?a=commitdiff_plain;h=c4bb6abc2b61390468a6f68907d47dafaff407dd;p=minix.git

vsprintf: fix special yet useful case for vsprintf where n < 1.

reported by jaldhar.
---

diff --git a/lib/libc/stdio/vsprintf.c b/lib/libc/stdio/vsprintf.c
index 7f0cc2f9e..38b4964f3 100644
--- a/lib/libc/stdio/vsprintf.c
+++ b/lib/libc/stdio/vsprintf.c
@@ -21,8 +21,10 @@ vsnprintf(char *s, size_t n, const char *format, va_list arg)
 	tmp_stream._count  = n-1;
 
 	retval = _doprnt(format, arg, &tmp_stream);
-	tmp_stream._count  = 1;
-	(void) putc('\0',&tmp_stream);
+	if(n > 0) {
+		tmp_stream._count  = 1;
+		(void) putc('\0',&tmp_stream);
+	}
 
 	return retval;
 }