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By default we'll run a container in --console=interactive and
--console=read-only mode depending if we are invoked on a tty or not so
that the container always gets a /dev/console allocated, i.e is always
suitable to run a full init system /as those typically expect a
/dev/console to exist).
With the new --console=autopipe mode we do something similar, but
slightly different: when not invoked on a tty we'll use --console=pipe.
This means, if you invoke some tool in a container with this you'll get
full inetractivity if you invoke it on a tty but things will also be
very nicely pipeable. OTOH you cannot invoke a full init system like
this, because you might or might not become a /dev/console this way...
Prompted-by: #17070
(I named this "autopipe" rather than "auto" or so, since the default
mode probably should be named "auto" one day if we add a name for it,
and this is so similar to "auto" except that it uses pipes in the
non-tty case).
Instead of first becoming a controlling process of the payload pty
as side effect of opening it (without O_NOCTTY), and then possibly
dropping it again, let's do it cleanly an reverse the logic: let's open
the pty without becoming its controller first. Only after everything
went the way we wanted it to go become the controller explicitly.
This has the benefit that the PID 1 stub process we run (as effect of
--as-pid2) doesn't have to lose the tty explicitly, but can just
continue running with things. And we explicitly make the tty controlling
right before invoking actual payload.
In order to make sure everything works as expected validate that the
stub PID 1 in the container really has no conrolling tty by issuing the
TIOCNOTTY tty and expecting ENOTTY, and log about it.
This shouldn't change behaviour much, it just makes thins a bit cleaner,
in particular as we'll not trigger SIGHUP on ourselves (since we are
controller and session leader) due to TIOCNOTTY which we then have to
explicitly ignore.
Just some refactoring: let's place the various verity related parameters
in a common structure, and pass that around instead of the individual
parameters.
Also, let's load the PKCS#7 signature data when finding metadata
right-away, instead of delaying this until we need it. In all cases we
call this there's not much time difference between the metdata finding
and the loading, hence this simplifies things and makes sure root hash
data and its signature is now always acquired together.
Graphics tablet devices comprise multiple event nodes, usually a Pen, Finger
and Pad node (that's how the kernel postfixes them). Pen and Pad are labeled
as ID_INPUT_TABLET but the pad doesn't actually send stylus events - it
doesn't usually have BTN_TOOL_PEN, merely BTN_STYLUS.
For the last several years, libwacom has set ID_INPUT_TABLET_PAD for all pad
devices known to it based on vid/pid and a "* Pad" name match. That does not
cover devices not in libwacom. libinput relies on ID_INPUT_TABLET_PAD to
initialize the pad backend.
We can't drop ID_INPUT_TABLET without breaking userspace, but we can add
ID_INPUT_TABLET_PAD ourselves - where a device has BTN_0 in addition to
BTN_STYLUS, let's add it as a pad.
There are some devices (notably: bamboos) that use BTN_LEFT instead of BTN_0
but they are relatively rare and there's a risk of mislabeling those devices,
so let's just stick with BTN_0 only.
3e5f04bf64 was trying to do the right thing, but
the resulting list does not match the autogenerated order (which is the same as
the order in vtable definition). I assume the addition was done manually. Fix
the order so that dbus-docs-fresh test is not unhappy.
RC_LOCAL_SCRIPT_PATH_START and RC_LOCAL_SCRIPT_PATH_STOP were was originally
added in the conversion to meson based on the autotools name. In
4450894653 RC_LOCAL_SCRIPT_PATH_STOP was dropped.
We don't need to use such a long name.
By settings AI_ADDRCONFIG in hints we cannot for example resolve "localhost"
when the local machine only has a loopback interface. This seems like an
unnecessary restriction, drop it.
Inspired by https://bugzilla.redhat.com/show_bug.cgi?id=1839007.
With new directive SystemCallLog= it's possible to list system calls to be
logged. This can be used for auditing or temporarily when constructing system
call filters.
---
v5: drop intermediary, update HASHMAP_FOREACH_KEY() use
v4: skip useless debug messages, actually parse directive
v3: don't declare unused variables with old libseccomp
v2: fix build without seccomp or old libseccomp
Define explicit action "kill" for SystemCallErrorNumber=.
In addition to errno code, allow specifying "kill" as action for
SystemCallFilter=.
---
v7: seccomp_parse_errno_or_action() returns -EINVAL if !HAVE_SECCOMP
v6: use streq_ptr(), let errno_to_name() handle bad values, kill processes,
init syscall_errno
v5: actually use seccomp_errno_or_action_to_string(), don't fail bus unit
parsing without seccomp
v4: fix build without seccomp
v3: drop log action
v2: action -> number