sysconf & AIO_LISTIO_MAX

[Andreas Schwab]

Neale.Ferguson@SoftwareAG-USA.com writes:

|> On Linux, how do I interpret getting a -1 value from
|> sysconf(_SC_AIO_LISTIO_MAX) with a ERRNO of 0 (i.e. successful)? Does that
|> mean Linux has no limit?

It means that it is not supported.  From SUS2
( http://www.unix-systems.org/onlinepubs/007908799/xsh/sysconf.html ):

 RETURN VALUE

     If name is an invalid value, sysconf() returns -1 and sets errno to
     indicate the error. If the variable corresponding to name is
     associated with functionality that is not supported by the system,
     sysconf() returns -1 without changing the value of errno.

Andreas.

-- 
Andreas Schwab                                  "And now for something
SuSE Labs                                        completely different."
Andreas.Schwab@suse.de
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