(fh = fopen("/proc/tty/driver/ttyS", "r")) == NULL) {
char errbuf[1024];
WARNING("serial: fopen: %s", sstrerror(errno, errbuf, sizeof(errbuf)));
(fh = fopen("/proc/tty/driver/ttyS", "r")) == NULL) {
char errbuf[1024];
WARNING("serial: fopen: %s", sstrerror(errno, errbuf, sizeof(errbuf)));