Re: File descriptors in 2.2, 'fixing' OPEN_MAX

Chris Wedgwood (cw@ix.net.nz)
Fri, 15 Jan 1999 09:23:46 +1300


On Wed, Jan 13, 1999 at 03:47:18PM -0500, Jordan Mendelson wrote:

> Ok, as far as I can tell, file descriptors in 2.2 (and later 2.1
> kernels) is set to 1024 maximum. However, 'include/linux/limits.h'
> has OPEN_MAX set to 256. This will break a lot of programs which
> use this to define their upper limit for file descriptors,
> particularly Squid and some flavors of IRCD.

Current suqid configure scripts are broken -- I have a patch I've yet
to submit to Duane to address this (and also to prefer poll when the
number of FDs in essential unlimit as in the ac patches)

> Shouldn't this value be set to 1024... or maybe these programs should
> test NR_OPEN instead?

Either way it's broken -- programs should test with getrlimit and use
that over `guessing' with a variaty of preprocessor defined values.

-cw

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/