Hey Christian,
Could we please have a manual page for the close_range(2) syscall
that's about to land in 5.9?
Thanks,
Michael
On Wed, 3 Jun 2020 at 12:24, Michael Kerrisk (man-pages)
wrote:
>
> Hi Christian,
>
> Could we have a manual page for this API (best before it's merged)?
>
> Thanks,
>
From: Szabolcs Nagy
> Sent: 05 June 2020 15:56
...
> currently there is no libc interface contract in place that
> says which calls may use libc internal fds e.g. i've seen
>
> openlog(...) // opens libc internal syslog fd
> ...
> fork()
> closefrom(...) // close syslog fd
> open(...)
On Sat, Jun 6, 2020 at 6:55 AM Szabolcs Nagy wrote:
>
> * Kyle Evans [2020-06-05 21:54:56 -0500]:
> > On Fri, Jun 5, 2020 at 9:55 AM Szabolcs Nagy wrote:
> > > this api needs a documentation patch if there isn't yet.
> > >
> > > currently there is no libc interface contract in place that
> > >
* Kyle Evans [2020-06-05 21:54:56 -0500]:
> On Fri, Jun 5, 2020 at 9:55 AM Szabolcs Nagy wrote:
> > this api needs a documentation patch if there isn't yet.
> >
> > currently there is no libc interface contract in place that
> > says which calls may use libc internal fds e.g. i've seen
> >
> >
On Fri, Jun 5, 2020 at 9:54 PM Kyle Evans wrote:
>
> On Fri, Jun 5, 2020 at 9:55 AM Szabolcs Nagy wrote:
> >
> > * Christian Brauner [2020-06-02 22:42:17
> > +0200]:
> > > [... snip ...]
> > >
> > > First, it helps to close all file descriptors of an exec()ing task. This
> > > can be done
On Fri, Jun 5, 2020 at 9:55 AM Szabolcs Nagy wrote:
>
> * Christian Brauner [2020-06-02 22:42:17
> +0200]:
> > [... snip ...]
> >
> > First, it helps to close all file descriptors of an exec()ing task. This
> > can be done safely via (quoting Al's example from [1] verbatim):
> >
> > /*
* Christian Brauner [2020-06-02 22:42:17 +0200]:
> This adds the close_range() syscall. It allows to efficiently close a range
> of file descriptors up to all file descriptors of a calling task.
>
> I've also coordinated with some FreeBSD developers who got in touch with
> me (Cced below).
Hi Christian,
Could we have a manual page for this API (best before it's merged)?
Thanks,
Michael
On Tue, 2 Jun 2020 at 22:44, Christian Brauner
wrote:
>
> This adds the close_range() syscall. It allows to efficiently close a range
> of file descriptors up to all file descriptors of a calling
On Wed, Jun 03, 2020 at 01:30:57AM +0200, Florian Weimer wrote:
> * Christian Brauner:
>
> > The performance is striking. For good measure, comparing the following
> > simple close_all_fds() userspace implementation that is essentially just
> > glibc's version in [6]:
> >
> > static int
* Christian Brauner:
> The performance is striking. For good measure, comparing the following
> simple close_all_fds() userspace implementation that is essentially just
> glibc's version in [6]:
>
> static int close_all_fds(void)
> {
> int dir_fd;
> DIR *dir;
> struct
This adds the close_range() syscall. It allows to efficiently close a range
of file descriptors up to all file descriptors of a calling task.
I've also coordinated with some FreeBSD developers who got in touch with
me (Cced below). FreeBSD intends to add the same syscall once we merged it.
Quite
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