(gdb) bt full
#0  0x00007ffff702969a in __strcmp_ssse3 () from /usr/lib/libc.so.6
No symbol table info available.
#1  0x0000000000404beb in main (argc=1, argv=0x1b6) at lircd.c:2337
        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {140737353852784, 140737353863168, 4202892,
              140737336384888, 4196224, 4294967296, 4294969392, 0, 140737354130568, 140737488349936, 140737353852784, 140737354129712,
              140737488349976, 0, 140737351932527, 7}}, sa_flags = -134502544, sa_restorer = 0x1}
        nodaemon = 1
        device = 0x645de5 "lirc0"
        errmsg = "/sys/class/rc/rc0/protocols\000\000\000\000\000\210\344\377\367\377\177\000\000`\352\377\377\377\177\000\000\000\360\377\377\001\000\000\000P\352\377\377\377\177\000\000.N=\366\000\000\000\000\214!@\000\000\000\000\000\377\377\377\377", '\000' <repeats 12 times>, "\250\021\361\366\377\177\000\000\000\320\373\367\377\177\000\000\000\000\000\000\000\000\000\000\200\234*\367\377\177\000"

(gdb) up
#1  0x0000000000404beb in main (argc=1, argv=0x1b6) at lircd.c:2337
2337            if (hw.device != NULL && strcmp(hw.device, lircdfile) == 0) {

(gdb) list
2332            }
2333            if (strcmp(hw.name, "null") == 0 && peern == 0) {
2334                    fprintf(stderr, "%s: there's no hardware I can use and no peers are specified\n", progname);
2335                    return (EXIT_FAILURE);
2336            }
2337            if (hw.device != NULL && strcmp(hw.device, lircdfile) == 0) {
2338                    fprintf(stderr, "%s: refusing to connect to myself\n", progname);
2339                    fprintf(stderr, "%s: device and output must not be the same file: %s\n", progname, lircdfile);
2340                    return (EXIT_FAILURE);
2341            }

(gdb) p hw
$1 = {device = 0x645de0 "/dev/lirc0", fd = -1, features = 0, send_mode = 0, rec_mode = 0, code_length = 0, init_func = 0x4196b0 <default_init>,
  deinit_func = 0x419510 <default_deinit>, send_func = 0x419b80 <default_send>, rec_func = 0x419550 <default_rec>,
  decode_func = 0x426380 <receive_decode>, ioctl_func = 0x419590 <default_ioctl>, readdata = 0x4195b0 <default_readdata>, name = 0x429f41 "default",
  resolution = 0}
(gdb) p lircdfile
$2 = 0x0
(gdb) p hw.device
$3 = 0x645de0 "/dev/lirc0"