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* container: Gracefully report mount errors in the child process.Ludovic Courtès2016-05-31
| | | | | | | | | | | | | Fixes <http://bugs.gnu.org/23306>. * gnu/build/linux-container.scm (run-container): Use 'socketpair' instead of 'pipe'. Rename 'in' to 'child' and 'out' to 'parent'. Send a 'ready message or an exception argument list from the child to the parent; adjust the parent accordingly. * tests/containers.scm ("call-with-container, mnt namespace, wrong bind mount"): New test. * tests/guix-environment-container.sh: Add test with --expose=/does-not-exist.
* container: Gracefully handle failure to set up user namespaces.Ludovic Courtès2016-05-31
| | | | | * gnu/build/linux-container.scm (run-container): Exit when the parent process doesn't say 'ready.
* build: container: Make 'unprivileged-user-namespace-supported?' more robust.Mark H Weaver2016-01-23
| | | | | | * gnu/build/linux-container.scm (unprivileged-user-namespace-supported?): Only read and check the first character, to cope with a possible newline in the (pseudo-)file.
* build: container: Add feature test predicates.David Thompson2015-11-03
| | | | | | | | * gnu/build/linux-container.scm (user-namespace-supported?, unprivileged-user-namespace-supported?, setgroups-supported?): New procedures. * tests/container.scm: Use predicates. * tests/syscalls.scm: Likewise.
* container: Remove unnecessary CLONE_CHILD_* flags.Ludovic Courtès2015-10-28
| | | | | | * gnu/build/linux-container.scm (namespaces->bit-mask): Remove CLONE_CHILD_CLEARTID and CLONE_CHILD_SETTID, which are unneeded. Discussed at <http://bugs.gnu.org/21694>.
* build: container: Fix call-with-clean-exit.David Thompson2015-10-10
| | | | | | | | Before, call-with-clean-exit would *always* return an exit code of 1. * gnu/build/linux-container.scm (call-with-clean-exit): Exit with status code of 0 if thunk does not throw an exception. * tests/containers.scm: Add test.
* build: container: Use the same clone flags as fork(3).David Thompson2015-09-07
| | | | | | | | | | | | The intent is to make 'clone' behave a lot more like 'primitive-fork', which calls clone(2) with SIGCHLD, CLONE_CHILD_CLEARTID, and CLONE_CHILD_SETTID flags. Notably, running 'clone' at the REPL without these flags would break the REPL beyond repair. * guix/build/syscalls.scm (CLONE_CHILD_CLEARTID, CLONE_CHILD_SETTID): New variables. * gnu/build/linux-container.scm (namespaces->bit-mask): Add CLONE_CHILD_CLEARTID and CLONE_CHILD_SETTID to bit mask.
* build: container: Setup /dev/console.David Thompson2015-09-07
| | | | | * gnu/build/linux-container.scm (mount-file-systems): Bind mount the controlling terminal as /dev/console.
* build: container: Add #:host-uids argument to call-with-container.David Thompson2015-08-08
| | | | | | | | | | | | It's not always possible to map 65536 uids when creating a container as the root user within another user namespace. This is true when building Guix within the build daemon's container. By using a uid range of 1 by default, even as the root user, the tests now pass. * gnu/build/linux-container.scm (initialize-user-namespace, run-container): Add 'host-uids' argument. (call-with-container): Add #:host-uids keyword argument. * tests/containers.scm ("container-excursion"): Update 'run-container' call.
* gnu: build: Add Linux container module.David Thompson2015-07-09
* gnu/build/linux-container.scm: New file. * gnu-system.am (GNU_SYSTEM_MODULES): Add it. * .dir-locals.el: Add Scheme indent rules for 'call-with-container', and 'container-excursion'. * tests/containers.scm: New file. * Makefile.am (SCM_TESTS): Add it.