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oasis-root

Compiled tree of Oasis Linux based on own branch at <https://hacktivis.me/git/oasis/> git clone https://anongit.hacktivis.me/git/oasis-root.git

flock.1 (695B)

    

  1. .Dd 2015-10-08
  2. .Dt FLOCK 1
  3. .Os sbase
  4. .Sh NAME
  5. .Nm flock
  6. .Nd tool to manage locks on files
  7. .Sh SYNOPSIS
  8. .Nm
  9. .Op Fl nosux
  10. .Ar file
  11. .Ar cmd Op arg ...
  12. .Sh DESCRIPTION
  13. .Nm
  14. is used to manage advisory locks on open files.
  15. It is commonly used to prevent long running cron jobs from running in
  16. parallel.
  17. If
  18. .Ar file
  19. does not exist, it will be created.
  20. .Sh OPTIONS
  21. .Bl -tag -width Ds
  22. .It Fl n
  23. Set non-blocking mode on the lock.
  24. Fail immediately if the lock cannot be acquired.
  25. .It Fl o
  26. Close the file descriptor before exec to avoid having the exec'ed
  27. program holding on to the lock.
  28. .It Fl s
  29. Acquire a shared lock.
  30. .It Fl u
  31. Release the lock.
  32. .It Fl x
  33. Acquire an exclusive lock.
  34. This is the default.
  35. .El