[PATCH v2 0/2] fs, close_range: add flag CLOSE_RANGE_CLOEXEC

[Christian Brauner]

On Mon, Oct 19, 2020 at 12:26:52PM +0200, Giuseppe Scrivano wrote:
> When the new flag is used, close_range will set the close-on-exec bit
> for the file descriptors instead of close()-ing them.
> 
> It is useful for e.g. container runtimes that want to minimize the
> number of syscalls used after a seccomp profile is installed but want
> to keep some fds open until the container process is executed.
> 
> v1->v2:
> * move close_range(..., CLOSE_RANGE_CLOEXEC) implementation to a separate function.
> * use bitmap_set() to set the close-on-exec bits in the bitmap.
> * add test with rlimit(RLIMIT_NOFILE) in place.
> * use "cur_max" that is already used by close_range(..., 0).

I'm picking this up for some testing, thanks
Christian