Correctly append \n in puts

libwrap/sys/puts.c

@@ -9,7 +9,8 @@ int __wrap_puts(const char* s) {
      const char* str = s;
      while(*str) 
           ++str;
-     *(char*)str='\n';
-     return _bsp_write(STDOUT_FILENO, s, (str - s)+1);   
+     if (_bsp_write(STDOUT_FILENO, s, str - s) != str - s)
+          return -1;
+     return _bsp_write(STDOUT_FILENO, "\n", 1) == 1 ? 0 : -1;
 }
     weak_under_alias(puts);