diff options
author | gVisor bot <gvisor-bot@google.com> | 2020-04-24 00:37:57 +0000 |
---|---|---|
committer | gVisor bot <gvisor-bot@google.com> | 2020-04-24 00:37:57 +0000 |
commit | 01665b4a54afd0efe5b376a789865de66b57ef87 (patch) | |
tree | 31e9b0befef005444f47a52a34aae12fe32712d1 /pkg/sentry/fsimpl/devtmpfs/devtmpfs.go | |
parent | c860716ef867306f28feccf25ab9c0066e3c5ffb (diff) | |
parent | 696feaf10c9339a57d177a913e847ddb488ece69 (diff) |
Merge release-20200323.0-228-g696feaf (automated)
Diffstat (limited to 'pkg/sentry/fsimpl/devtmpfs/devtmpfs.go')
-rwxr-xr-x | pkg/sentry/fsimpl/devtmpfs/devtmpfs.go | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/pkg/sentry/fsimpl/devtmpfs/devtmpfs.go b/pkg/sentry/fsimpl/devtmpfs/devtmpfs.go index 64f1b142c..142ee53b0 100755 --- a/pkg/sentry/fsimpl/devtmpfs/devtmpfs.go +++ b/pkg/sentry/fsimpl/devtmpfs/devtmpfs.go @@ -163,16 +163,25 @@ func (a *Accessor) CreateDeviceFile(ctx context.Context, pathname string, kind v func (a *Accessor) UserspaceInit(ctx context.Context) error { actx := a.wrapContext(ctx) - // systemd: src/shared/dev-setup.c:dev_setup() + // Initialize symlinks. for _, symlink := range []struct { source string target string }{ - // /proc/kcore is not implemented. + // systemd: src/shared/dev-setup.c:dev_setup() {source: "fd", target: "/proc/self/fd"}, {source: "stdin", target: "/proc/self/fd/0"}, {source: "stdout", target: "/proc/self/fd/1"}, {source: "stderr", target: "/proc/self/fd/2"}, + // /proc/kcore is not implemented. + + // Linux implements /dev/ptmx as a device node, but advises + // container implementations to create /dev/ptmx as a symlink + // to pts/ptmx (Documentation/filesystems/devpts.txt). Systemd + // follows this advice (src/nspawn/nspawn.c:setup_pts()), while + // LXC tries to create a bind mount and falls back to a symlink + // (src/lxc/conf.c:lxc_setup_devpts()). + {source: "ptmx", target: "pts/ptmx"}, } { if err := a.vfsObj.SymlinkAt(actx, a.creds, a.pathOperationAt(symlink.source), symlink.target); err != nil { return fmt.Errorf("failed to create symlink %q => %q: %v", symlink.source, symlink.target, err) |