unix package: test needed for getLoginName

[argiopetech]

See (long-running) Trac issue: T1487.

[athanclark]

I just ran into this issue, interestly only when using systemd to start my daemon:

root@koredex:~# systemctl status koredex
● koredex.service - KoreDEX
   Loaded: loaded (/etc/systemd/system/koredex.service; disabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Wed 2017-11-15 18:59:03 UTC; 2s ago
  Process: 26021 ExecStart=/home/koredex/KoreDEX/backend/bin/koredex --host <redacted> --public-port 80 (code=exited, status=1/FAILURE)
 Main PID: 26021 (code=exited, status=1/FAILURE)
      CPU: 7ms

Nov 15 18:59:03 koredex systemd[1]: Started KoreDEX.
Nov 15 18:59:03 koredex koredex[26021]: koredex: getLoginName: illegal operation (Inappropriate ioctl for device)
Nov 15 18:59:03 koredex systemd[1]: koredex.service: Main process exited, code=exited, status=1/FAILURE
Nov 15 18:59:03 koredex systemd[1]: koredex.service: Unit entered failed state.
Nov 15 18:59:03 koredex systemd[1]: koredex.service: Failed with result 'exit-code'.

However, when I run the daemon in a terminal session, everything works fine.