From: Ben Pfaff <blp@nicira.com>
Date: Mon, 29 Dec 2008 21:26:19 +0000 (-0800)
Subject: Make ds_cstr() always null-terminate the string.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1db8d9dc86e69d02eb21df641d71f2e0abd61aa3;p=openvswitch

Make ds_cstr() always null-terminate the string.

Most of the time the string in "struct ds" is
null-terminated, but there seem to be a few corner cases
where it is not.  Make ds_cstr() always put in the null
terminator, for safety.

Thanks to Justin for pointing out the problem.
---

diff --git a/lib/dynamic-string.c b/lib/dynamic-string.c
index 0c5dd5f3..03efac07 100644
--- a/lib/dynamic-string.c
+++ b/lib/dynamic-string.c
@@ -199,8 +199,8 @@ ds_cstr(struct ds *ds)
 {
     if (!ds->string) {
         ds_reserve(ds, 0);
-        ds->string[0] = '\0';
     }
+    ds->string[ds->length] = '\0';
     return ds->string;
 }