vpnc version 0.5.4
   hex_test: 00010203

S1 init_sockaddr
 [2020-04-07 16:18:09]

S2 make_socket
 [2020-04-07 16:18:09]

S3 setup_tunnel
 [2020-04-07 16:18:09]
   using interface
vpnc: can't initialise tunnel interface:1) = ? ERESTARTNOHAND (To be restarted if no handler)
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=823694, si_uid=0, si_status=1, si_utime=0, si_stime=0} ---
write(5, "\21", 1)                      = 1
rt_sigreturn({mask=[]})                 = -1 EINTR (Interrupted system call)
read(4, "\21", 1)                       = 1
read(4, 0x7fc6b99df7, 1)                = -1 EAGAIN (Resource temporarily unavailable)
rt_sigprocmask(SIG_BLOCK, ~[RTMIN RT_1], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
wait4(823694, [{WIFEXITED(s) && WEXITSTATUS(s) == 1}], WNOHANG|WSTOPPED, NULL) = 823694
rt_sigaction(SIGHUP, {sa_handler=0x5560b9f010, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTART}, NULL, 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x5560b9f010, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTART}, NULL, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=0x5560b9f010, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTART}, NULL, 8) = 0
rt_sigaction(SIGUSR1, {sa_handler=0x5560b9f010, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTART}, NULL, 8) = 0
rt_sigaction(SIGUSR2, {sa_handler=0x5560b9f010, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTART}, NULL, 8) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTART}, NULL, 8) = 0
rt_sigaction(SIGALRM, {sa_handler=0x5560b9f010, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTART}, NULL, 8) = 0
rt_sigaction(SIGTERM, {sa_handler=0x5560b9f010, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTART}, NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x5560b9f010, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTART}, NULL, 8) = 0
rt_sigaction(SIGCONT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, NULL, 8) = 0
rt_sigaction(SIGTSTP, {sa_handler=0x5560b9f010, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTART}, NULL, 8) = 0
close(4)                                = 0
close(5)                                = 0
getuid()                                = 0
openat(AT_FDCWD, "/etc/login.defs", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=11046, ...}) = 0
read(3, "#\n# /etc/login.defs - Configurat"..., 4096) = 4096
read(3, "ommented out and\n# set TTYPERM t"..., 4096) = 4096
read(3, "56, SHA256-based algorithm will "..., 4096) = 2854
close(3)                                = 0
munmap(0x7fa5759000, 163872)            = 0
munmap(0x7fa5710000, 295400)            = 0
munmap(0x7fa56fe000, 69648)             = 0
munmap(0x7fa56ec000, 69648)             = 0
munmap(0x7fa56d9000, 73768)             = 0
munmap(0x7fa56c4000, 81936)             = 0
munmap(0x7fa56b1000, 73744)             = 0
exit_group(1)                           = ?
+++ exited with 1 +++