From 837d96d1b3340a804ee08374a2838844f6bf4c4c Mon Sep 17 00:00:00 2001
From: Harry Jeffery <harry@exec64.co.uk>
Date: Thu, 15 Aug 2019 19:41:59 +0100
Subject: commands: Fix buffer overrun

---
 src/commands.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/commands.c b/src/commands.c
index 3808929..25ec702 100644
--- a/src/commands.c
+++ b/src/commands.c
@@ -27,10 +27,10 @@ static char *join_str_list(struct list *list, const char *sep, size_t start)
       assert(buf);
     }
 
-    strncat(buf, list->items[i], cap);
+    strncat(buf, list->items[i], cap - 1);
     len += item_len;
 
-    strncat(buf, sep, cap);
+    strncat(buf, sep, cap - 1);
     len += sep_len;
   }
   return buf;
-- 
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