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2023-01-30linux-container: 'container-excursion' forks to join the PID namespace....Fixes <https://issues.guix.gnu.org/61156>. * gnu/build/linux-container.scm (container-excursion): Add extra call to 'primitive-fork' and invoke THUNK in the child process. * tests/containers.scm ("container-excursion"): Remove extra 'primitive-fork' call, now unnecessary. ("container-excursion*, /proc"): New test. Ludovic Courtès
2023-01-30container: Correctly report exit status....* gnu/build/linux-container.scm (container-excursion): Return the raw status value. * tests/containers.scm ("container-excursion, same namespaces"): Add 'status:exit-val' call. * guix/scripts/container/exec.scm (guix-container-exec): Correctly handle the different cases. Ludovic Courtès
2022-09-24linux-container: Mark socket pair as SOCK_CLOEXEC....* gnu/build/linux-container.scm (run-container): Pass SOCK_CLOEXEC to 'socketpair'. Ludovic Courtès
2022-09-20linux-container: 'container-excursion*' marks its FDs as FD_CLOEXEC....Fixes <https://issues.guix.gnu.org/57827>. Reported by Mathieu Othacehe <othacehe@gnu.org>. Fixes a regression introduced with the Shepherd 0.9.2 upgrade in 1ba0e38267c9ff8bb476285091be6e297bbf136e, whereby IN and OUT would no longer be closed when 'fork+exec-command/container' would call 'exec-command*' as part of the THUNK passed to 'container-excursion*'. This is because the Shepherd 0.9.2 assumes file descriptors are properly marked as O_CLOEXEC and, consequently, 'exec-command' no longer run the close(2) loop prior to 'exec'. * gnu/build/linux-container.scm (container-excursion*): Add calls to 'fcntl'. Ludovic Courtès
2022-05-01linux-container: Add #:child-is-pid1? parameter to 'call-with-container'....* gnu/build/linux-container.scm (wait-child-process) (status->exit-status): New procedures. (call-with-container): Add #:child-is-pid1? parameter and honor it. [thunk*]: New variable. Pass it to 'run-container'. Ludovic Courtès
2022-05-01linux-container: Ensure signal-handling asyncs get a chance to run....Previously we could enter the blocking 'waitpid' call and miss an opportunity to run the signal handler async. * gnu/build/linux-container.scm (call-with-container) [periodically-schedule-asyncs]: New procedure. [install-signal-handlers]: Call it. Ludovic Courtès
2022-05-01linux-container: 'call-with-container' relays SIGTERM and SIGINT....* gnu/build/linux-container.scm (call-with-container): Add #:relayed-signals. [install-signal-handlers]: New procedure. Call it. Ludovic Courtès
2022-01-05linux-container: Handle CLONE_NEWCGROUP and use it by default....Adds low-level support for launching Linux containers with cgroup namespaces. * gnu/build/linux-container.scm (%namespaces): Add 'cgroup. (namespaces->bit-mask): Handle it. * guix/build/syscalls.scm (CLONE_NEWCGROUP): New variable. Signed-off-by: Ludovic Courtès <ludo@gnu.org> Ryan Sundberg
2020-12-06Revert "linux-container: Correct test for unprivileged user namespace support."...This broke 'guix environment --container' on non-Debian distributions. Fixes <https://bugs.gnu.org/45066>. Reported by luhux <luhux@outlook.com>. This reverts commit 8bc5ca5160db3d82bd5b6b2b7ed80c96f42bd33e. Marius Bakke
2020-12-03linux-container: Correct test for unprivileged user namespace support....Fixes <https://bugs.gnu.org/31977>. Reported by Paul Garlick <pgarlick@tourbillion-technology.com>. * gnu/build/linux-container.scm (unprivileged-user-namespace-supported?): Return #f when the 'userns-file' does not exist. Paul Garlick
2020-10-01linux-container: Reset jailed root permissions....* gnu/build/linux-container.scm (mount-file-systems): Add 'chmod' call. * tests/containers.scm ("call-with-container, mnt namespace, root permissions"): New test. Jelle Licht
2020-09-10build: linux-container: Fix run-container....This is a follow-up of 5316dfc0f125b658e4a2acf7f00f49501663d943. Some users of run-container may expect that the container is jailed, even if there are no mounts. This is the case for some Guix tests. * gnu/build/linux-container.scm (run-container): Do not jail the container when the requested root is "/". Mathieu Othacehe
2020-09-02linux-container: Do not jail the container unconditionally....We may want to run a container inside the MNT namespace, without jailing the container. If RUN-CONTAINER is passed a null MOUNTS list, do not jail the container. * gnu/build/linux-container.scm (run-container): Do not call MOUNT-FILE-SYSTEMS if MOUNTS list is empty. Mathieu Othacehe