[CRIU] [PATCH 3/3] signalfd: add ability to send any siginfo to itself

[Pavel Emelyanov]

On 11/29/2012 08:51 PM, Andrey Vagin wrote:
> The operation writes takes siginfo from a buffer and send it
> in a queue. If a signalfd is created with the flag SFD_GROUP,
> siginfo will be sent in a group queue, otherwise in a local queue.
> 
> rt_siginfoqueue doesn't allow to send siginfo with positive si_code,
> and it's correct, because a positive si_code is reserved for kernel
> signals. But if process will send "incorrect" siginfo to itself,
> this operation doesn't look danger.
> 
> This functionality will be used for restoring pending signals.

Let's discuss why regular syscalls are not enough.

> Signed-off-by: Andrey Vagin <avagin at openvz.org>