Let's lock this down a bit. Effectively nothing much changes, since the
default PK policy will allow users on the VT to change VT. Only users
with no local VT session won't be able to switch VTs.
The same as parent commit, but users. This is the third and last
foo_object_find() function in logind, so I think that this particular
family of bugs is finally squashed.
The story is the same as in 471cffcfb0e005b7c4044b3b52cc4f25d217efac:
device_attach() → seat_send_changed() → sd_bus_emit_properties_changed_strv()
→ emit_properties_changed_on_interface() → node_vtable_get_userdata()
→ seat_object_find(), which returns 0 because message == NULL.
But when we are emitting a signal, message is always NULL. Removing the
overeager check and assert in the called function allow the signal to be
emitted.
Fixes#13769.
As documented in the man-page, readdir() may return a directory entry with
d_type == DT_UNKNOWN. This must be handled for regular filesystems.
dirent_ensure_type() is available to set d_type if necessary. Use it in
some more places.
Without this systemd will fail to boot correctly with nfsroot and some
other filesystems.
Closes#13609
I want to use efivars.[ch] in proc-cmdline.c, but most of the efivars stuff is
not needed in basic/. Move the file from shared/ to basic/, but then move back
most of the higher-level functions to the new shared/efi-loader.c file.
We would not send the property because we'd call sd_bus_get_current_message()
which would return NULL. If there is no message, we cannot support /self or
/auto, but things are still OK if a path with a session name is given.
Traceback when the issue is triggered:
#2 we'd call sd_bus_get_current_message() here, which would return NULL, and
session_object_find() would immediately return 0.
#3 0x00000000004289b7 in session_object_find (bus=0x9f1110, path=0xa160b0 "/org/freedesktop/login1/session/c2",
interface=0x9efda0 "org.freedesktop.login1.Session", userdata=0x9852f0, found=0x7ffe3e975fe8, error=0x7ffe3e9760b0)
at ../src/login/logind-session-dbus.c:620
#4 0x00007ff74bfdde39 in node_vtable_get_userdata (bus=0x9f1110, path=0xa160b0 "/org/freedesktop/login1/session/c2",
c=0x9f6d58, userdata=0x7ffe3e976070, error=0x7ffe3e9760b0) at ../src/libsystemd/sd-bus/bus-objects.c:37
#5 0x00007ff74bfe49af in emit_properties_changed_on_interface (bus=0x9f1110,
prefix=0xa133a0 "/org/freedesktop/login1/session", path=0xa160b0 "/org/freedesktop/login1/session/c2",
interface=0x43f9f8 "org.freedesktop.login1.Session", require_fallback=true, found_interface=0x7ffe3e976163,
names=0x7ffe3e9761b0) at ../src/libsystemd/sd-bus/bus-objects.c:2088
#6 0x00007ff74bfe56a4 in sd_bus_emit_properties_changed_strv (bus=0x9f1110,
path=0xa160b0 "/org/freedesktop/login1/session/c2", interface=0x43f9f8 "org.freedesktop.login1.Session",
names=0x7ffe3e9761b0) at ../src/libsystemd/sd-bus/bus-objects.c:2291
#7 0x00000000004292ea in session_send_changed (s=0xa16e10, properties=0x43ee27 "Active")
at ../src/login/logind-session-dbus.c:730
#8 0x0000000000424cd7 in seat_set_active (s=0x9ee280, session=0xa16e10) at ../src/login/logind-seat.c:249
#9 0x00000000004251cf in seat_active_vt_changed (s=0x9ee280, vtnr=3) at ../src/login/logind-seat.c:361
#10 0x000000000042547b in seat_read_active_vt (s=0x9ee280) at ../src/login/logind-seat.c:395
#11 0x000000000040ab5c in manager_dispatch_console (s=0x9f0320, fd=8, revents=8, userdata=0x9852f0)
at ../src/login/logind.c:588
#12 0x00007ff74c042d5f in source_dispatch (s=0x9f0320) at ../src/libsystemd/sd-event/sd-event.c:2828
#13 0x00007ff74c04469f in sd_event_dispatch (e=0x9ef340) at ../src/libsystemd/sd-event/sd-event.c:3241
#14 0x00007ff74c044b58 in sd_event_run (e=0x9ef340, timeout=18446744073709551615)
at ../src/libsystemd/sd-event/sd-event.c:3299
#15 0x000000000040d7e8 in manager_run (m=0x9852f0) at ../src/login/logind.c:1186
#16 0x000000000040db58 in run (argc=1, argv=0x7ffe3e976728) at ../src/login/logind.c:1234
#17 0x000000000040dc30 in main (argc=1, argv=0x7ffe3e976728) at ../src/login/logind.c:1244
Fixes#13437. Bug introduced in 3b92c086a8.
Previously, logind's logind-session.h would define prototypes for
logind-session.c and logind-session-dbus.c. Split that out, so that
there's a separate logind-session-dbus.h for that. Similar for seats and
users as well as the manager itself.
This changes no code, just rearranges where protoypes are located.
Most of the operations one can do on sessions so far accepted an empty
session name as a shortcut for the caller's session. This is quite
useful traditionally, but much less useful than it used to be, since
most user code now (rightfully) runs in --user context, not in a
session.
With this change we tweak the logic a bit: we introduce the two special
session and seat names "self" and "auto". The former refers to the
session/seat the client is in, and is hence mostly equivalent to te
empty string "" as before. However, the latter refers to the
session/seat the client is in if that exists, with a fallback of the
user's display session if not. Clients can hence reference "auto"
instead of the empty string if they really don't want to think much
about sessions.
Why "self" btw? Previously, we'd already expose a special dbus object
with the path /org/freedesktop/login1/session/self (and similar for the
seat), matching what the empty string did for bus calls that took a
session name. With this scheme we reuse this identifier and introduce
"auto" in a similar way.
Of course this means real-life seats and sessions can never be named
"self" or "auto", but they aren't anyway: valid seat names have to start
with "seat" anyway, and sessions are generated server-side as either a
numeric value or "c" suffixed with a counter ID.
Fixes: #12399
This adds support for user to set & get reboot parameter for reboot.
As callee would be next issuing Reboot call same policy checks are being used.
If unit file issuing the reboot action defines RebootArgument (or similar) that
setting takes precedence.
This behaves similar to the "boot into firmware" logic, and also allows
either direct EFI operation (which sd-boot supports and others might
support eventually too) or override through env var.
This extends the reboot-to-firmware logic in logind, so that other than
EFI firmwares could be theoretically support. The scheme is like this:
if you want to support this, set the $SYSTEMD_REBOOT_TO_FIRMWARE=1 env
var for logind. If so, this will override the EFI logic, and cause a
file /run/systemd/reboot-to-firmware file to be created when
reboot-to-firmware is requested. This file has no contents, it's mere
existance indicates a reboot with reboot-to-firmware set.
The idea is that for alternative firmwares a drop-in for logind is added
that sets the env var, in combination with some code run during shutdown
that checks for the file and does the right thing.
This reverts commit edda44605f.
The kernel explicitly supports resuming with a different kernel than the one
used before hibernation. If this is something that shouldn't be supported, the
place to change this is in the kernel. We shouldn't censor something that this
exclusively in the kernel's domain.
People might be using this to switch kernels without restaring programs, and
we'd break this functionality for them.
Also, even if resuming with a different kernel was a bad idea, we don't really
prevent that with this check, since most users have more than one kernel and
can freely pick a different one from the menu. So this only affected the corner
case where the kernel has been removed, but there is no reason to single it
out.
This splits out a bunch of functions from fileio.c that have to do with
temporary files. Simply to make the header files a bit shorter, and to
group things more nicely.
No code changes, just some rearranging of source files.
Ideally, coccinelle would strip unnecessary braces too. But I do not see any
option in coccinelle for this, so instead, I edited the patch text using
search&replace to remove the braces. Unfortunately this is not fully automatic,
in particular it didn't deal well with if-else-if-else blocks and ifdefs, so
there is an increased likelikehood be some bugs in such spots.
I also removed part of the patch that coccinelle generated for udev, where we
returns -1 for failure. This should be fixed independently.
This reverts 5fdf2d51c2, except for one improved
log message.
Fixes#10613.
Checking if resume= is configured is a good idea, but it turns out we cannot do
it reliably:
- the code only supported boot options with sd-boot, and it's not very widely
used. This means that for most systemd we could only check the current
commandline, not the next one.
- Various systems resume without, e.g. Debian has
/etc/initramfs-tools/conf.d/resume in the initramfs.
Making those checks better would be possible with enough effort, but there'll
be always new systems that boot in a slightly different way and we would need
to keep adding new cases. Longer term, we want to rely on autodetecting the
resume partition, and then checks like this will not be necessary at all. It is
quite clear from the number of bug reports that the number of poeple impacted
by this is quite high now, so let's just drop this.
The three core variables that affect idleness handling are whether we
are docked, whether we are on AC power and whether the lid is closed,
hence let's also expose the third variable on the bus, to make things
nicely debuggable.
It's not, after all, that's what SetRebootToFirmware() is about.
(I was wondering for a moment whether to make this EMITS_CHANGES, but
decided against it, given that the flag actually can be changed
externally to logind too, and we couldn't send out notifications for
that.)
This is useful so that during shutdown scope units are always terminated
before the mounts necessary for the home directory.
(Ideally we'd also add a similar dependency from the user@.service
instance to the home directory, but this isn't as easy as that service
is defined statically and not dynamically, and hence not easy to modify
dynamically, in particular when it comes to deps)
