On Wed, Oct 22, 2014 at 3:24 AM, Mark Volkmann
<[email protected]> wrote:
> The docs say ...
> " 'ax' - Like 'a' but fails if path exists."
> and a bit later ...
> "The exclusive flag 'x' ensures that path is newly created."
>
> What is the point is using the 'ax' mode if it can't append to an existing
> file?
> It seems that the 'wx' mode would do the same thing.
>
> --
> R. Mark Volkmann
> Object Computing, Inc.

Mode 'ax' (which is a shorthand for `O_APPEND | O_CREAT | O_EXCL |
O_WRONLY`, see `man 2 open`) is useful when there will be multiple
concurrent writers, like, say, different processes that write to a
single log file.  Without the append flag, the processes would
overwrite each other's output.

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