nix

nix
- errno
- fcntl
- poll
- pty
- spawn
- sys
  - ioctl
  - memfd
  - prctl
  - select
  - signal
  - signalfd
  - stat
  - statfs
  - statvfs
  - sysinfo
  - termios
  - time
  - wait
- unistd
  - alarm

nix :: fcntl :: flock

Function `flock`

fn flock(fd: RawFd, arg: FlockArg) -> Result<()>