strace

23:07:27.516871 poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}]) <0.000047>
23:07:27.516988 writev(3, [{"\f\2\5\0\6\0\200\3\3\0\200\3\0\0\0\0\0\0\0\0\16\0\2\0\6\0\200\3", 28}, {NULL, 0}, {"", 0}], 3) = 28 <0.000023>
23:07:27.517086 poll([{fd=3, events=POLLIN}], 1, -1) = 1 ([{fd=3, revents=POLLIN}]) <0.000378>
23:07:27.517532 recvfrom(3, "\25\0e\0\6\0\200\3\6\0\200\3\377Y\340\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 4096, 0, NULL, NULL) = 32 <0.000011>
23:07:27.517639 poll([{fd=3, events=POLLIN}], 1, -1) = 1 ([{fd=3, revents=POLLIN}]) <0.000046>
23:07:27.517741 recvfrom(3, "\226\0e\0\6\0\200\3\6\0\200\3\4\0`\1\0\0\0\0\0\4\0\3\0\0\0\0\0\0\0\0", 4096, 0, NULL, NULL) = 32 <0.000008>
23:07:27.517802 poll([{fd=3, events=POLLIN}], 1, -1) = 1 ([{fd=3, revents=POLLIN}]) <0.000011>
23:07:27.517863 recvfrom(3, "\1\30g\0\0\0\0\0Y\1\0\0\0\0\0\0\0\4\0\3\0\0\0\0\0\0\0\0\0\0\0\0", 4096, 0, NULL, NULL) = 32 <0.000010>
23:07:27.518018 recvfrom(3, 0x1d8ea24, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000008>
23:07:27.523260 pipe2([4, 5], O_CLOEXEC) = 0 <0.000023>
23:07:27.523362 write(5, "*", 1)        = 1 <0.000034>
23:07:27.523453 futex(0x8238f8, FUTEX_WAKE_PRIVATE, 2147483647) = 0 <0.000068>
23:07:27.523624 epoll_create1(O_CLOEXEC) = 6 <0.000016>
23:07:27.523721 pipe2([7, 8], O_NONBLOCK|O_CLOEXEC) = 0 <0.000061>
23:07:27.523897 pipe2([9, 10], O_NONBLOCK|O_CLOEXEC) = 0 <0.000050>
23:07:27.525344 brk(0x1feb000)          = 0x1feb000 <0.000008>
23:07:27.526303 brk(0x2011000)          = 0x2011000 <0.000006>
23:07:27.526535 brk(0x2032000)          = 0x2032000 <0.000004>
23:07:27.526717 brk(0x2053000)          = 0x2053000 <0.000006>
23:07:27.526913 brk(0x2074000)          = 0x2074000 <0.000005>
23:07:27.527258 brk(0x2095000)          = 0x2095000 <0.000006>
23:07:27.527604 brk(0x20b6000)          = 0x20b6000 <0.000004>
23:07:27.530495 brk(0x20d7000)          = 0x20d7000 <0.000011>
23:07:27.531889 brk(0x20fd000)          = 0x20fd000 <0.000006>
23:07:27.532038 uname({sys="Linux", node="gtx", ...}) = 0 <0.000005>
23:07:27.532198 fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 7), ...}) = 0 <0.000005>
23:07:27.532226 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fd558d94000 <0.000011>
23:07:27.532256 write(1, "Selected value: 0\n", 18Selected value: 0
) = 18 <0.000011>
23:07:27.532285 write(1, "ok set 0 to true, 0\n", 20ok set 0 to true, 0
) = 20 <0.000007>
23:07:27.532318 write(1, "Get child elements in radio!\n", 29Get child elements in radio!
) = 29 <0.000007>
23:07:27.532342 write(1, "Get child elements in radio!\n", 29Get child elements in radio!
) = 29 <0.000007>
23:07:27.532365 write(1, "Get child elements in radio!\n", 29Get child elements in radio!
) = 29 <0.000007>
23:07:27.532445 open("/", O_RDONLY|O_CLOEXEC) = 11 <0.000009>
23:07:27.532480 socket(PF_INET, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 12 <0.000010>
23:07:27.532507 setsockopt(12, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 <0.000005>
23:07:27.532533 bind(12, {sa_family=AF_INET, sin_port=htons(5050), sin_addr=inet_addr("0.0.0.0")}, 16) = 0 <0.000006>
23:07:27.532570 listen(12, 128)         = 0 <0.000010>
23:07:27.532602 recvfrom(3, "\226\0g\0\6\0\200\3\6\0\200\3\4\0`\1\217\2\31\1\0\4\0\3\0\0\0\0\0\0\0\0"..., 4096, 0, NULL, NULL) = 224 <0.000007>
23:07:27.532634 recvfrom(3, 0x1d8ea24, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000003>
23:07:27.532657 recvfrom(3, 0x1d8ea24, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000004>
23:07:27.532676 poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}]) <0.000004>
23:07:27.532699 writev(3, [{"\22\0\n\0\6\0\200\3'\0\0\0\37\0\0\0\10\0\0\0\16\0\0\0Buttons "..., 176}, {NULL, 0}, {"", 0}], 3) = 176 <0.000006>
23:07:27.532728 recvfrom(3, 0x1d8ea24, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000004>
23:07:27.532748 recvfrom(3, 0x1d8ea24, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000003>
23:07:27.532768 recvfrom(3, 0x1d8ea24, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000004>
23:07:27.533006 write(1, "[verbose] \33[36m[void buttons::Se"..., 67[verbose] [void buttons::Server::update() L47] - ...
) = 67 <0.000009>
23:07:27.533036 epoll_ctl(6, EPOLL_CTL_ADD, 7, {EPOLLIN, {u32=7, u64=7}}) = 0 <0.000005>
23:07:27.533058 epoll_ctl(6, EPOLL_CTL_ADD, 9, {EPOLLIN, {u32=9, u64=9}}) = 0 <0.000004>
23:07:27.533078 epoll_ctl(6, EPOLL_CTL_ADD, 12, {EPOLLIN, {u32=12, u64=12}}) = 0 <0.000004>
23:07:27.533097 epoll_wait(6,

---------------
23:14:37.383007 epoll_ctl(6, EPOLL_CTL_ADD, 7, {EPOLLIN, {u32=7, u64=7}}) = 0 <0.000004>
23:14:37.383030 epoll_ctl(6, EPOLL_CTL_ADD, 9, {EPOLLIN, {u32=9, u64=9}}) = 0 <0.000003>
23:14:37.383049 epoll_ctl(6, EPOLL_CTL_ADD, 12, {EPOLLIN, {u32=12, u64=12}}) = 0 <0.000003>
23:14:37.383072 epoll_wait(6,
{{EPOLLIN, {u32=12, u64=12}}}, 1024, 4294967295) = 1 <29.296014>
23:15:06.679215 accept4(12, 0, NULL, SOCK_CLOEXEC|SOCK_NONBLOCK) = 13 <0.000111>
23:15:06.679388 nanosleep({0, 1}, NULL) = 0 <0.000072>
23:15:06.679494 accept4(12, 0, NULL, SOCK_CLOEXEC|SOCK_NONBLOCK) = -1 EAGAIN (Resource temporarily unavailable) <0.000025>
23:15:06.679539 epoll_ctl(6, EPOLL_CTL_ADD, 13, {EPOLLIN, {u32=13, u64=13}}) = 0 <0.000006>
23:15:06.679562 epoll_wait(6, {{EPOLLIN, {u32=13, u64=13}}}, 1024, 4294967295) = 1 <0.000008>
23:15:06.679616 brk(0x1803000)          = 0x1803000 <0.000007>
23:15:06.679675 read(13, "\1\0\0\0\0", 65536) = 5 <0.000015>
23:15:06.679761 write(13, "\0", 1)      = 1 <0.000014>
23:15:06.679798 write(13, "\363\1\0\0", 4) = 4 <0.000016>
23:15:06.679871 write(13, "\2\0\0\0\0\0\0\0\0,\1\0\0\20\3\0\0\1\0\0\0\232\231\231>\315\314L>q=\212"..., 499) = 499 <0.000009>
23:15:06.679907 brk(0x17f3000)          = 0x17f3000 <0.000010>
23:15:06.679937 epoll_wait(6, {{EPOLLIN, {u32=13, u64=13}}}, 1024, 4294967295) = 1 <9.606616>
23:15:16.286584 read(13, "", 65536)     = 0 <0.000005>
23:15:16.286616 epoll_ctl(6, EPOLL_CTL_ADD, 13, {EPOLLOUT, {u32=13, u64=13}}) = -1 EEXIST (File exists) <0.000003>
23:15:16.286635 epoll_ctl(6, EPOLL_CTL_MOD, 13, {EPOLLOUT, {u32=13, u64=13}}) = 0 <0.000003>
23:15:16.286648 epoll_wait(6, {{EPOLLOUT, {u32=13, u64=13}}}, 1024, 4294967295) = 1 <0.000003>
23:15:16.286668 shutdown(13, 1 /* send */) = 0 <0.000020>
23:15:16.286705 close(13)               = 0 <0.000006>
23:15:16.286727 write(1, "\33[31m[error] \33[36m[buttons::Conn"..., 101[error]