From 1475845675aba03b356697561f3600f4d08317ec Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Fri, 1 Mar 2019 21:03:10 +1100
Subject: [PATCH] [c-host] correct buffer size for stncat
---
c-host/linux/platform.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/c-host/linux/platform.c b/c-host/linux/platform.c
index 4c4c9d75..f84055af 100644
--- a/c-host/linux/platform.c
+++ b/c-host/linux/platform.c
@@ -82,8 +82,8 @@ int main(int argc, char * argv[])
// get the device size
{
char file[100] = "/sys/class/uio/";
- strncat(file, params.shmDevice , sizeof(file));
- strncat(file, "/maps/map0/size", sizeof(file));
+ strncat(file, params.shmDevice , sizeof(file) - 1);
+ strncat(file, "/maps/map0/size", sizeof(file) - 1);
int fd = open(file, O_RDONLY);
if (fd < 0)
@@ -109,7 +109,7 @@ int main(int argc, char * argv[])
// open the device
{
char file[100] = "/dev/";
- strncat(file, params.shmDevice, sizeof(file));
+ strncat(file, params.shmDevice, sizeof(file) - 1);
app.shmFD = open(file, O_RDWR, (mode_t)0600);
app.shmMap = MAP_FAILED;
if (app.shmFD < 0)