Re: setsockopt(..,SO_RCVBUF,..) sets wrong value

[Alan Cox]

> When I do a setsockopt(..,SO_RCVBUF,..) and then read the value back
> with getsockopt(), the reported value is exactly twice of what I set.
> Running the same code on Solaris and on DEC UNIX reports back the
> exact size I set.
> Looking at the code it seems that the  *2  should not be there:

You are making assumptions not guaranteed in POSIX or SuS. In the Linux case
we deliberately allow more than requested as our memory accounting behaviour
for buffers is very different to BSD