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Mounting a directory of devices like /dev/snd should mount all child devices.

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I have seen a lot of people try to do this and reach out to me on how to mount
/dev/snd because it is returning "not a device node". The docs imply you can
_just_ mount /dev/snd and that is not the case. This fixes that. It also allows
for coolness if you want to mount say /dev/usb.

Docker-DCO-1.1-Signed-off-by: Jessie Frazelle <hugs@docker.com> (github: jfrazelle)

Docker-DCO-1.1-Signed-off-by: Jessie Frazelle <princess@docker.com> (github: jfrazelle)

Docker-DCO-1.1-Signed-off-by: Jessie Frazelle <jess@docker.com> (github: jfrazelle)

Docker-DCO-1.1-Signed-off-by: Jessica Frazelle <jess@docker.com> (github: jfrazelle)
This commit is contained in:
Jessica Frazelle 2015-02-12 10:51:51 -08:00
parent 3fe7a3d537
commit 664004ed0c
2 changed files with 72 additions and 6 deletions
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27
integration-cli/docker_cli_run_unix_test.go
View file

@ -173,3 +173,30 @@ func TestRunContainerWithCgroupParentAbsPath(t *testing.T) {
logDone("run - cgroup parent with absolute cgroup path")
}
func TestRunDeviceDirectory(t *testing.T) {
defer deleteAllContainers()
cmd := exec.Command(dockerBinary, "run", "--device", "/dev/snd:/dev/snd", "busybox", "sh", "-c", "ls /dev/snd/")
out, _, err := runCommandWithOutput(cmd)
if err != nil {
t.Fatal(err, out)
}
if actual := strings.Trim(out, "\r\n"); !strings.Contains(out, "timer") {
t.Fatalf("expected output /dev/snd/timer, received %s", actual)
}
cmd = exec.Command(dockerBinary, "run", "--device", "/dev/snd:/dev/othersnd", "busybox", "sh", "-c", "ls /dev/othersnd/")
out, _, err = runCommandWithOutput(cmd)
if err != nil {
t.Fatal(err, out)
}
if actual := strings.Trim(out, "\r\n"); !strings.Contains(out, "seq") {
t.Fatalf("expected output /dev/othersnd/timer, received %s", actual)
}
logDone("run - test --device directory mounts all internal devices")
}