From: ludo@gnu.org (Ludovic Courtès)
To: David Thompson <dthompson2@worcester.edu>
Cc: guix-devel@gnu.org, David Thompson <davet@gnu.org>
Subject: Re: [PATCH 06/15] build: syscalls: Add setns syscall wrapper.
Date: Tue, 07 Jul 2015 15:28:21 +0200 [thread overview]
Message-ID: <87h9pgjdvu.fsf@gnu.org> (raw)
In-Reply-To: <1436188604-2813-6-git-send-email-dthompson2@worcester.edu> (David Thompson's message of "Mon, 6 Jul 2015 09:16:35 -0400")
David Thompson <dthompson2@worcester.edu> skribis:
> From: David Thompson <davet@gnu.org>
>
> * guix/build/syscalls.scm (setns): New procedure.
> * tests/syscalls.scm: Test it.
[...]
> + (lambda (fdes nstype)
> + "Reassociate the current process with the namespace specified by FDES.
“... by FDES, a file descriptor obtained by opening a /proc/PID/ns/*
files.”
> +(test-assert "setns"
> + (match (clone (logior CLONE_NEWUSER))
> + (0 (primitive-exit 0))
> + (clone-pid
> + (match (pipe)
> + ((in . out)
> + (match (primitive-fork)
> + (0
> + (close in)
> + (call-with-input-file (user-namespace clone-pid)
> + (lambda (port)
> + (setns (port->fdes port) 0)))
> + (write 'done out)
> + (close out)
> + (primitive-exit 0))
> + (fork-pid
> + (close out)
> + ;; Wait for the child process to join the namespace.
> + (read in)
> + (equal? (readlink (user-namespace clone-pid))
> + (readlink (user-namespace fork-pid))))))))))
Add a waipid call for both CLONE-PID and FORK-PID to make sure nothing’s
left behind.
OK with these changes!
Ludo’.
next prev parent reply other threads:[~2015-07-07 13:28 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-06 13:16 [PATCH 01/15] build: syscalls: Add additional mount flags David Thompson
2015-07-06 13:16 ` [PATCH 02/15] build: syscalls: Add unmount flags David Thompson
2015-07-07 14:50 ` Ludovic Courtès
2015-07-07 22:44 ` Thompson, David
2015-07-06 13:16 ` [PATCH 03/15] build: syscalls: Add mkdtemp! David Thompson
2015-07-07 13:15 ` Ludovic Courtès
2015-07-07 22:52 ` Thompson, David
2015-07-06 13:16 ` [PATCH 04/15] utils: Add call-with-temporary-directory David Thompson
2015-07-07 13:15 ` Ludovic Courtès
2015-07-07 22:54 ` Thompson, David
2015-07-06 13:16 ` [PATCH 05/15] build: syscalls: Add clone syscall wrapper David Thompson
2015-07-07 13:23 ` Ludovic Courtès
2015-07-08 0:28 ` Thompson, David
2015-07-11 10:18 ` Ludovic Courtès
2015-07-06 13:16 ` [PATCH 06/15] build: syscalls: Add setns " David Thompson
2015-07-07 13:28 ` Ludovic Courtès [this message]
2015-07-08 0:57 ` Thompson, David
2015-07-06 13:16 ` [PATCH 07/15] build: syscalls: Add pivot-root David Thompson
2015-07-07 13:35 ` Ludovic Courtès
2015-07-08 1:18 ` Thompson, David
2015-07-08 12:47 ` Ludovic Courtès
2015-07-06 13:16 ` [PATCH 08/15] gnu: build: Add Linux container module David Thompson
2015-07-07 13:51 ` Ludovic Courtès
2015-07-08 12:38 ` Thompson, David
2015-07-08 21:57 ` Ludovic Courtès
2015-07-09 12:56 ` Thompson, David
2015-07-06 13:16 ` [PATCH 09/15] gnu: system: Move <file-system-mapping> into (gnu system file-systems) David Thompson
2015-07-07 13:51 ` Ludovic Courtès
2015-07-08 1:21 ` Thompson, David
2015-07-06 13:16 ` [PATCH 10/15] gnu: system: Move file-system->spec to " David Thompson
2015-07-07 13:51 ` Ludovic Courtès
2015-07-08 1:22 ` Thompson, David
2015-07-06 13:16 ` [PATCH 11/15] gnu: system: Add Linux container module David Thompson
2015-07-07 13:55 ` Ludovic Courtès
2015-07-09 13:00 ` Thompson, David
2015-07-10 17:57 ` Ludovic Courtès
2015-07-06 13:16 ` [PATCH 12/15] gnu: system: Add Linux container file systems David Thompson
2015-07-07 13:56 ` Ludovic Courtès
2015-07-09 12:56 ` Thompson, David
2015-07-06 13:16 ` [PATCH 13/15] scripts: system: Add 'container' action David Thompson
2015-07-07 14:05 ` Ludovic Courtès
2015-10-27 0:24 ` Thompson, David
2015-10-27 17:41 ` Ludovic Courtès
2015-10-30 17:28 ` Thompson, David
2015-07-06 13:16 ` [PATCH 14/15] scripts: environment: Add --container option David Thompson
2015-07-07 14:35 ` Ludovic Courtès
2015-07-09 13:16 ` Thompson, David
2015-07-10 18:03 ` Ludovic Courtès
2015-09-05 23:45 ` Thompson, David
2015-09-11 12:39 ` Ludovic Courtès
2015-10-10 21:11 ` Thompson, David
2015-10-11 19:34 ` Ludovic Courtès
2015-10-17 10:05 ` Ludovic Courtès
2015-10-22 1:23 ` Thompson, David
2015-10-25 21:38 ` Ludovic Courtès
2015-10-26 0:35 ` Thompson, David
2015-10-27 10:13 ` Ludovic Courtès
2015-10-31 1:25 ` Thompson, David
2015-10-31 10:28 ` Ludovic Courtès
2015-07-06 13:16 ` [PATCH 15/15] scripts: Add 'container' subcommand David Thompson
2015-07-07 14:50 ` Ludovic Courtès
2015-10-27 0:31 ` Thompson, David
2015-10-27 17:46 ` Ludovic Courtès
2015-07-07 13:14 ` [PATCH 01/15] build: syscalls: Add additional mount flags Ludovic Courtès
2015-07-07 22:42 ` Thompson, David
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