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command, and support both a terse and a verbose output format
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signature is passed in
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for all objects
This is a ton more useful when some services fail, since we continue
crawling then and output everything to a pager.
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same time
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it for a future "busctl introspect" command
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object properties
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any body
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kdbus has seen a larger update than expected lately, most notably with
kdbusfs, a file system to expose the kdbus control files:
* Each time a file system of this type is mounted, a new kdbus
domain is created.
* The layout inside each mount point is the same as before, except
that domains are not hierarchically nested anymore.
* Domains are therefore also unnamed now.
* Unmounting a kdbusfs will automatically also detroy the
associated domain.
* Hence, the action of creating a kdbus domain is now as
privileged as mounting a filesystem.
* This way, we can get around creating dev nodes for everything,
which is last but not least something that is not limited by
20-bit minor numbers.
The kdbus specific bits in nspawn have all been dropped now, as nspawn
can rely on the container OS to set up its own kdbus domain, simply by
mounting a new instance.
A new set of mounts has been added to mount things *after* the kernel
modules have been loaded. For now, only kdbus is in this set, which is
invoked with mount_setup_late().
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kdbus learned parsing the attach flags for the KDBUS_CMD_BUS_CREATOR_INFO
ioctl. Bits not set in this mask will not be exported. Set that field to
_KDBUS_ATTACH_ALL for now.
Signed-off-by: Daniel Mack <daniel@zonque.org>
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kdbus learned to accept both a numerical destination ID as well as a
well-known-name. In that case, kdbus makes sure that the numerical ID is in
fact the owner of the provided name and fails otherwise.
This allows for race-free assertion of a bus name owner while sending a
message, which is a requirement for bus-proxyd.
Add two new fields to sd_bus_message, and set the numerical ID to
verify_destination_id if bus_message_setup_kmsg() is called for a
message with a well-known name.
Also, set the destination's name in the kdbus item to .destination_ptr
if it is non-NULL.
Normal users should not touch these fields, and they're not publicy
accessible.
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end-of-line and end-of-item marks
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The metadata logic in kdbus has seen a rework, and the only mandatory
change we have to follow for now is that attach_flags in kdbus_cmd_hello
is now split into two parts, attach_flags_send and attach_flags_recv.
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In kdbus a "server id" is mostly a misnomer, as there isn't any "server"
involved anymore. Let's rename this to "owner" id hence, since it is an
ID that is picked by the owner of a bus or direct connection. This
matches nicely the sd_bus_get_owner_creds() call we already have.
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a) When getting the description return ENXIO if none is set
b) Allow setting a description to NULL
c) return ECHILD on fork() like for other calls
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To mirror the recent name change of the concept for sd_bus objects,
follow the same logic for sd_event_source objects, too.
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kdbus recently renamed this concept, and so should we in what we expose
in userspace.
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Catch up with some changes in kdbus.h:
* KDBUS_{ITEM,ATTACH}_CONN_NAME were renamed to
KDBUS_{ITEM,ATTACH}_CONN_DESCRIPTION, so the term 'name' is not
overloaded as much.
* The item types were re-ordered a little so they are lined up to the
order of the corresponding KDBUS_ATTACH flags
* A new item type KDBUS_ITEM_OWNED_NAME was introduced, designated to
store a struct kdbus_name in item->name. KDBUS_ITEM_NAME soley
stores data in item->str now
* Some kerneldoc fixes
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__attribute__((used)) is not enough to force static variables to
be carried over to a compiled program from a library. Mappings defined
in libsystemd-shared.a were not visible in the compiled binaries.
To ensure that the mappings are present in the final binary, the
tables are made non-static and are given a real unique name by which
they can be referenced.
To use a mapping defined not in the local compilation unit (e.g. in
a library) a reference to the mapping table is added. This is done
by including a declaration in the header file.
Expected values in test-engine are fixed to reflect the new mappings.
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Depending on the link order, holes might appear in the body of
the sd_bus_errnomap section. Ignore them.
Adds a simple test to print the table to help with debugging such
issues in the future.
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This allows custom "name" ↔ errno mappings to be registered.
Tables from all compilation units are concatenated.
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provided headers
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We really shouldn't create fds ever that have the flag unset.
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files, for dissection with wireshark
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right occasions
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spec
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Some comment fixes and header cleanups in kdbus.h, and the task capability
meta information has been factored out to its own struct.
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Let's give coverity a hint what's going on here.
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This reverts commit b1543c4c93855b61b40118e9f14a0423dac2e078.
We check b->address anyway, no need to check the return value,
especially given that the other #ifdef branch don't get the same
treatment.
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sd_bus_error, just go on
sd_bus_error_setfv() must initialize the sd_bus_error value to some
sensible value and then return a good errno code matching that. If it
cannot work at all it should set the error statically to the OOM error.
But if it can work half-way (i.e. initialize the name, but not the
message) it should do so and still return the correct errno number for
it.
This effectively reverts 8bf13eb1e02b9977ae1cd331ae5dc7305a305a09
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The way process_closing() picks the first entry from reply_callbacks
and works with it makes it likely that it cares about the order.
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string_is_safe()
After all, we know have this as generic validator, so let's be correct
and use it wherver applicable.
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sd_bus_get_owner_creds() was only halfly ported over to
_cleanup_bus_creds_unref_.
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kdbus learned a new ioctl to tell userspace about a bus creator's
credentials, which is what we need to implement sd_bus_get_owner_creds() for
kdbus.
Move the function from sd-bus.c to bus-control.c to be able to reuse
the bus_populate_creds_from_items() helper.
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sd_bus_get_peer_creds()
Clean up the function namespace by renaming the following:
sd_bus_get_owner_uid() → sd_bus_get_name_creds_uid()
sd_bus_get_owner_machine_id() → sd_bus_get_name_machine_id()
sd_bus_get_peer_creds() → sd_bus_get_owner_creds()
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We will re-use the code to walk items in order to populate a creds object,
so let's factor it out first.
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