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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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Systemd 209 started setting $WATCHDOG_PID, and sd-daemon watch was
modified to check for this variable. This means that
sd_watchdog_enabled() stopped working with previous versions of
systemd. But sd-event is a public library and API and we must keep it
working even when a program compiled with a newer version of the
libary is used on a system running an older version of the manager.
getenv() and unsetenv() are fairly expensive calls, so optimize
sd_watchdog_enabled() by not calling them when unnecessary.
man: centralize the description of $WATCHDOG_PID and $WATCHDOG_USEC in
the sd_watchdog_enabled manpage. It is better not to repeat the same
stuff in two places.
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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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kdbus learned a new command to query a bus creator's credentials. Sync
kdbus.h first, which also renames some struct to more generic terms.
That is, however, not an ABI break this time.
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Don't handle clock_gettime() errors gracefully but use assert_se().
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kdbus_msg.timeout_ns now takes an absolute value, based on CLOCK_MONOTONIC,
in order to eventually support automatically restarted syscalls.
Signed-off-by: Daniel Mack <daniel@zonque.org>
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In kdbus.h, the following details changed:
* All commands gained a 'kernel_flags' field to report the flags supported
by the driver. Before, this was done in the 'flags' field in a
bidirectional way, which turned out to be a problem for the code in
sd-bus, as many parts of it reuse the same ioctl struct more than once
and consider them to be owned by userspace.
* Name listings are now returned by a new struct instead of reusing struct
kdbus_cmd_name for that matter. This way, we don't add more unneeded
fields to it and make the API cleaner.
* 'conn_flags' was renamed to 'flags' in struct kdbus_cmd_hello to make
the API a bit more unified.
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kdbus.h now has KDBUS_ATTACH_COMM split into KDBUS_ATTACH_TID_COMM and
KDBUS_ATTACH_PID_COMM. The items were split already, so the change in
systemd is easy.
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In kdbus.h, the 'features' field has been dropped again. Instead of
negotiating features that way, we decided to make the kernel return the
set of supported flags in each ioctl struct's .flags field, in both the
success and error cases.
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This reverts commit 1a2409e262da65a4b0ca8ab18fcf5eabd2d404ca.
Support from the kdbus interface was removed. We require
memfds to be supported by all clients.
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kdbus learned KDBUS_HELLO_ACCEPT_MEMFD as new connection negotiation
flag. Set it by default in systemd for now.
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FAIL: test-engine
=================
Cannot find cgroup mount point: No such file or directory
Assertion 'r >= 0' failed at ../src/test/test-engine.c:46, function main(). Aborting.
FAIL: test-sched-prio
=====================
Cannot find cgroup mount point: No such file or directory
Assertion 'r >= 0' failed at ../src/test/test-sched-prio.c:42, function main(). Aborting.
FAIL: test-bus-cleanup
======================
Assertion 'sd_bus_open_system(&bus) >= 0' failed at ../src/libsystemd/sd-bus/test-bus-cleanup.c:40, function test_bus_open(). Aborting.
after new: refcount 1
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Commit 710fc9779b7c (kdbus repo) introduced attaching items[]
instead of name[] in kdbus_cmd_conn_info struct. Commit 581fe6c81
(systemd repo) caught up with this change, but item size was not
properly calculated.
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Check for OOM conditions of asprintf() in bus_set_address_user().
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When a child event is disabled (in order to be freed) and there is no
SIGCHLD signal event, sd_event_source_set_enabled will disable SIGCHLD
even if there are other child events.
Also remove some unneeded signalfd updates.
https://bugs.freedesktop.org/show_bug.cgi?id=84659
Based-on-a-patch-by: Hristo Venev <mustrumr97@gmail.com>
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Sync kdbus.h once again. Two thing have changed:
a) KDBUS_CMD_EP_* was renamed to KDBUS_CMD_ENDPOINT_*
b) struct kdbus_cmd_hello and struct kdbus_cmd_make gained a
'features' bitfield (which is currently unused)
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Check for OOM situations when vasprintf() returns < 0 in bus_error_setfv().
Spotted by coverity.
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Fix a user of the KDBUS_CMD_FREE ioctl that was missed in the transition.
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Walk the items first, then free the memory of the message.
Also, while at it, make coverity happy with an explicit (void) prefix.
We intentionally ignore the return value here.
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It is no longer used after d663f1b1a92a778bcdc68f29b8c08cb49431b4f7
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The KDBUS_CMD_FREE ioctl now uses a struct rather than a direct pointer
to the offset to free.
The KDBUS_CMD_MSG_CANCEL ioctl has also changes, but there's no user of
it yet in systemd.
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CID #996315.
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If we are bothering to check whether the kernel is not feeding us
bad data, we might as well do it properly.
CID #1237692.
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m is always non-null at this point. This function is too long anyway.
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Appease coverity report #1237775.
Also rename ss to n, to make it visually different from ss.
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keep function invocations and variable declarations separate
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struct kdbus_cmd_match got a flags field, which systemd currently makes no
use of.
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struct kdbus_cmd_conn_info takes a list of items now instead of a string.
Fix the only user in SD of that ioctl.
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D-Bus' type hierarchy as described in the spec is:
\- basic
\- fixed type (u, i, etc.)
\- string-like type (s, o, g)
\- container
Someone seems to have referred to basic types as "simple types" at
some point, but that term isn't defined in the D-Bus Specification,
and seems redundant.
So far I haven't renamed functions that use "trivial" in their names
to mean "fixed type", to avoid confusion about whether a struct of
constant length, like (iu), is a fixed type. The answer is that it is
fixed-length, but is not a "fixed type", so I can see that something
like bus_type_is_fixed() might be ambiguous.
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The kdbus limit is 2M and we removed the bus-owner override. Therefore,
use at most 2M as message size.
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Move the +1 calculus onto the definition of the variable, just to make
the code a little easier to read. No functional change.
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strerror_r does not return null here and even if it did we would have
problems already at the preceding strlen call.
Found by coverity. Fixes: CID#1237770
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Just a rename of two struct members to make the header file c++ compatible.
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The kdbus logic name registry logic was changed to transport the actual
name to acquire, release or report in a kdbus item.
This brings the name API a little more in line with other calls, and allows
for later augmentation.
Follow that change on the systemd side.
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The desktop brand is stored as DESKTOP variable for sessions. It can be
set arbitrarily by the session owner and identifies the desktop
environment that is running on that session.
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All kdbus ioctl arguments must be 8byte aligned. Make sure we use
alloca_align() and _alignas_(8) in all situations where gcc doesn't
guarantee 8-byte alignment.
Note that objects on the stack are always 8byte aligned as we put
_alignas_(8) into the structure definition in kdbus.h.
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We always use "int" if we retrieve boolean values from sd-bus, as "bool"
is only a single byte, but full int on va-args.
Thanks to Werner Fink for the report!
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