From aa3daf4eda7ae9894ff7b61096a87b0a560521a3 Mon Sep 17 00:00:00 2001
From: Mike Black W9MDB <mdblack98@yahoo.com>
Date: Tue, 18 Jan 2022 14:46:29 -0600
Subject: [PATCH] Change sprintf to SNPRINTF in serial.c
 https://github.com/Hamlib/Hamlib/issues/857

---
 src/serial.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/serial.c b/src/serial.c
index 3df0fd5e0..de4ead71e 100644
--- a/src/serial.c
+++ b/src/serial.c
@@ -696,9 +696,10 @@ int HAMLIB_API serial_flush(hamlib_port_t *p)
 
             if (binary)
             {
-                char *hbuf = calloc(len * 3 + 1, 1);
+                int bytes = len * 3 + 1;
+                char *hbuf = calloc(bytes, 1);
 
-                for (i = 0; i < len; ++i) { sprintf(&hbuf[i * 3], "%02X ", buf[i]); }
+                for (i = 0; i < len; ++i) { SNPRINTF(&hbuf[i * 3], bytes - (i*3),  "%02X ", buf[i]); }
 
                 rig_debug(RIG_DEBUG_WARN, "%s: flush hex:%s\n", __func__, hbuf);
                 free(hbuf);