[CRIU] [PATCH 0/3 v3] crtools: close a signal descriptor after passing a preparation stage

[Andrei Vagin]

On Wed, Jan 11, 2017 at 08:36:20AM +0100, Adrian Reber wrote:
> On Wed, Jan 11, 2017 at 12:21:42AM +0300, Andrei Vagin wrote:
> > This patch adds the --siganl-fd FD option to specify a file descriptor.
> > CRIU will write '\0' to this descriptor and close it after passing
> > a preparation stage.
> > 
> > It is alternative way to demonizing a criu process after a preparation
> > stage. It's imposiable to get exit code, if a process has daemonized.
> > 
> > The introduced way allows to wait a preparation stage and to get an exit
> > code. It can be easy used from shell and other script languages.
> 
> As I am currently looking at runc and criu lazy-pages I want to make
> sure I understand this correctly. It sounds like I could pass a FD to
> criu and start in in lazy-page mode. Once criu reaches the point where I
> can make TCP connections to request lazy pages this FD will be closed,
> right?

Yes

> 
> 		Adrian