[vlc-devel] [PATCH v2 2/2] control: rc: avoid stringop-truncation warning

Alexandre Janniaux ajanni at videolabs.io
Mon Jan 20 16:44:44 CET 2020


Fortify enabled implies a warning if we use strncpy with a length equal
to the buffer size. As we fill the last item with a null character, we
can use length-1 instead as well.
---
 modules/control/rc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/control/rc.c b/modules/control/rc.c
index 86ee873030..cdfa70b08c 100644
--- a/modules/control/rc.c
+++ b/modules/control/rc.c
@@ -1738,7 +1738,7 @@ static int Activate( vlc_object_t *p_this )
         }
 
         addr.sun_family = AF_LOCAL;
-        strncpy( addr.sun_path, psz_unix_path, sizeof( addr.sun_path ) );
+        strncpy( addr.sun_path, psz_unix_path, sizeof( addr.sun_path ) - 1 );
         addr.sun_path[sizeof( addr.sun_path ) - 1] = '\0';
 
         if (bind (i_socket, (struct sockaddr *)&addr, sizeof (addr))
-- 
2.25.0



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