I've never heard of a way to query the maximum number of handles. But, I know the limit is very large, more than you should really need. Is there a particular reason you were wanting to do this?

Hi bud,

I googled and found this. I couldn't see what kernel version it was talking about but i suppose it is a rough guide if nothing else.

Hope it helps,

ace

My debian kernel 2.6.8-2-386 can open 1022 files, didn't try under windows though but this is how I did it...



Jc

[Edit]: You can close the standard entry/output and standard error and then get 1025...

Quote:Original post by ace_lovegrove
Hi bud,

I googled and found this. I couldn't see what kernel version it was talking about but i suppose it is a rough guide if nothing else.

Hope it helps,

ace

I don't know much on the Linux side, so we'll assume that document is correct (Linux = 1024 file handles)

On the Windows side, NT based Windows (NT 4, 2000, XP) has 2048 handles.

Windows 9X I'm not sure of for one reason: Unlike Windows NT, which only runs DOS VMs when you run a DOS program, Windows 9X (95/98ME) had a number of legacy DOS elements for running things like real mode drivers and such. Under Windows, each DOS VM uses a number of file handles - IIRC the system itself needs to grab about 20 to run various parts of the DOS VM (since the program is not being given direct access to the hardware), and another 10 (or more depending on system settings) get reserved for the program itself. So basically each DOS VM process (including a bunch of thunking processes automatically run by the system) could be reserving 30 handles each, whether it uses them or not (to be honest I'm not sure how accurate I remember all this, as Windows 95/DOS issues are something I haven't had to think about for a very long time).