these functions are safer

src/utils.c

@@ -69,10 +69,12 @@ inline char *pretty_bytes(const uint64_t bytes, int8_t start_suffix, char *buf,
 /* path has to have at least 8 free chars at the end for glob */
 int get_hwmon_dir(char *path, const size_t bufsz) {
 	glob_t g;
-	strncat(path, "/hwmon*", 10);
+
+	if (strlcat(path, "/hwmon*", bufsz) >= bufsz)
+		return -1;
 
 	if (glob(path, 0, NULL, &g) == 0) {
-		strncpy(path, g.gl_pathv[0], bufsz); // same size as hwmon length, careful
+		strlcpy(path, g.gl_pathv[0], bufsz); // same size as hwmon length, careful
 		globfree(&g);
 		return 0;
 	}