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* implementation of SIOCGIFFCOUNT
@ 2001-10-08 13:52 Sebastian Heidl
  2001-10-08 14:03 ` BALBIR SINGH
  0 siblings, 1 reply; 2+ messages in thread
From: Sebastian Heidl @ 2001-10-08 13:52 UTC (permalink / raw)
  To: linux-kernel


Hi,

is there a specific reason for SIOCGIFCOUNT not being implemented
in  the kernel ? All occurences lead to net/core/dev.c dev_ioctl(...)
which just returns -EINVAL for this command. So one has to guess
the number of struct ifreq structures to pass to a SIOCGIFCONF
call.

enlighten me, please ;-)
_sh_

-- 

^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: implementation of SIOCGIFFCOUNT
  2001-10-08 13:52 implementation of SIOCGIFFCOUNT Sebastian Heidl
@ 2001-10-08 14:03 ` BALBIR SINGH
  0 siblings, 0 replies; 2+ messages in thread
From: BALBIR SINGH @ 2001-10-08 14:03 UTC (permalink / raw)
  To: Sebastian Heidl, linux-kernel

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Pass '0' as the size argument and u will get the total size (sizeof struct * number of interfaces)
back. The only thing is u have to make two calls, which u would do anyway.

Balbir

Sebastian Heidl wrote:

>Hi,
>
>is there a specific reason for SIOCGIFCOUNT not being implemented
>in  the kernel ? All occurences lead to net/core/dev.c dev_ioctl(...)
>which just returns -EINVAL for this command. So one has to guess
>the number of struct ifreq structures to pass to a SIOCGIFCONF
>call.
>
>enlighten me, please ;-)
>_sh_
>




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2001-10-08 13:52 implementation of SIOCGIFFCOUNT Sebastian Heidl
2001-10-08 14:03 ` BALBIR SINGH

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