Hi there,

I try to set up a box without procfs, thus I've to set some kernel
parameters using _sysctl().

I wrote a little quick-n-dirty program to set at least integer and
struct ( or better array ) parameters.

I can set all struct, integer and boolean values with this program
except ip_forward.

Due to the docs ip_forward is a BOOLEAN parameter, so the length of the
value array for _sysctl should be 1.

... but ...

in ${KERNELSRC}/net/ipv4/sysctl_net_ipv4.c I find:
snip -->
<-- snap
static int ipv4_sysctl_forward_strategy(ctl_table *table ...
snip -->
<-- snap
	if (newlen != sizeof(int))
		return -EINVAL;
snip -->

If the config file for my program looks like this:
	# CTL_NET IPV4  FORWARD : YES
	3	  5     8	: 1
I get ``Invalid argument'' from my program.
If the config file for my program looks like this:
	3	  5     8	: 1 1 1 1
it works and I have a ``1'' in /proc/sys/net/ipv4/ip_forward.
... sure sizeof(int) is 4 on my machine.

My question:
Is there something wrong with the documentation, and NET_IPV4_FORWARD
awaits 4 integers to set/unset IP forwarding, or is something wrong in
sysctl_net_ipv4.c, or did I understand something wrong, and my program
has to be written in some other kind?

My program itself is in the attachment.

Thanks for every help
Frank

PS:
If the configuration file looks like this:
	3  5  16  1 : 1
(the ``3  5  8'' is due to sysctl.h only for compatibility with 2.0
kernels, and I run an 2.4.16) i get ENODIR.