The macro determines the right length of a AF_UNIX "struct sockaddr_un" to pass to
connect() or bind(). It automatically figures out if the socket refers to an
abstract namespace socket, or a socket in the file system, and properly handles
the full length of the path field.
This macro is not only safer, but also simpler to use, than the usual
offsetof() + strlen() logic.
Since glibc is moving away from implicitly including sys/sysmacros.h
all the time via sys/types.h, include the header directly in more
places. This seems to cover most makedev/major/minor usage.
Also downgrade non-fatal warnings to log_warning.
Previously rule_add_key() would check the output array and log a cryptic
error and return -1. Most of the time the return value was ignored. This
does not seems right, because the buffer can overflow with enough rules.
It would also check if we have enough space for the *next* rule, even if
there might be not next rule, i.e. off-by-one.
Replace this with a check that we have enough space for a next rule before
we start parsing.
Normally using macros to alter flow is not allowed, but in this case I
think it is worth it, because it allows lots of boilerplate code to be
removed and hides repeated boring parameters, making function logic much
easier to follow.
If the attribute wasn't found, the last filename looked at was returned in
the input/output argument. This just seems bad style.
The return value was ignored, so change function to return void.
Usually, we place the #pragma once before the copyright blurb in header files,
but in a few cases we didn't. Move those around, so that we do the same thing
everywhere.
Running "udevadm test-builtin path_id /sys/devices/platform/" results
in a segmentation fault.
The problem is that udev_device_get_subsystem(dev) might return NULL
in a streq() call. Solve this problem by using streq_ptr() instead.
Enumeration of virtio buses is global and hence
non-deterministic. However, we are guaranteed there is never going to be
more than one virtio bus per parent PCI device. While populating
ID_PATH we simply skip virtio part of the syspath and we extend the path
using the sysname of the parent PCI device.
With this patch udev creates following by-path links for virtio-blk
device /dev/vda which contains two partitions.
ls -l /dev/disk/by-path/
total 0
lrwxrwxrwx 1 root root 9 Feb 9 10:47 virtio-pci-0000:00:05.0 -> ../../vda
lrwxrwxrwx 1 root root 10 Feb 9 10:47 virtio-pci-0000:00:05.0-part1 -> ../../vda1
lrwxrwxrwx 1 root root 10 Feb 9 10:47 virtio-pci-0000:00:05.0-part2 -> ../../vda2
See:
http://lists.linuxfoundation.org/pipermail/virtualization/2015-August/030328.htmlFixes#2501
The commmon case default qeth link is enccw0.0.0600 is rather long.
Thus strip leading zeros (which doesn't make the bus_id unstable),
similar to the PCI domain case.
Also 'ccw' is redundant on S/390, as there aren't really other buses
available which could have qeth driver interfaces. Not sure why this
code is even compiled on non-s390[x] platforms. But to distinguish from
e.g. MAC stable names shorten the suffix to just 'c'.
Thus enccw0.0.0600 becomes enc600.
fds will also be closed during manager cleanup in run, leading
to an error when we try to close them again. It is now possible
to "leak" the fds on error, but it's an unlikely event and we
will exit immediately anyway.
Fixes#2418.
Little change in practice, because the program will exit soon
afterwards, but the standard style of closing all fds is now followed.
Also gets rid of gcc warning about fd_ctrl and fd_uevent being
unitialized.
gcc is confused by the common idiom of
return errno ? -errno : -ESOMETHING
and thinks a positive value may be returned. Replace this condition
with errno > 0 to help gcc and avoid many spurious warnings. I filed
a gcc rfe a long time ago, but it hard to say if it will ever be
implemented [1].
Both conventions were used in the codebase, this change makes things
more consistent. This is a follow up to bcb161b023.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61846
We quite obviously check whether event->dev_db is nonnull, and
right after that call a function which asserts the same. Move
the call under the same if.
https://bugzilla.redhat.com/show_bug.cgi?id=1283971
GLIB has recently started to officially support the gcc cleanup
attribute in its public API, hence let's do the same for our APIs.
With this patch we'll define an xyz_unrefp() call for each public
xyz_unref() call, to make it easy to use inside a
__attribute__((cleanup())) expression. Then, all code is ported over to
make use of this.
The new calls are also documented in the man pages, with examples how to
use them (well, I only added docs where the _unref() call itself already
had docs, and the examples, only cover sd_bus_unrefp() and
sd_event_unrefp()).
This also renames sd_lldp_free() to sd_lldp_unref(), since that's how we
tend to call our destructors these days.
Note that this defines no public macro that wraps gcc's attribute and
makes it easier to use. While I think it's our duty in the library to
make our stuff easy to use, I figure it's not our duty to make gcc's own
features easy to use on its own. Most likely, client code which wants to
make use of this should define its own:
#define _cleanup_(function) __attribute__((cleanup(function)))
Or similar, to make the gcc feature easier to use.
Making this logic public has the benefit that we can remove three header
files whose only purpose was to define these functions internally.
See #2008.
Change the "out" parameter from uint8_t[8] to uint64_t. On architectures which
enforce pointer alignment this fixes crashes when we previously cast an
unaligned array to uint64_t*, and on others this should at least improve
performance as the compiler now aligns these properly.
This also simplifies the code in most cases by getting rid of typecasts. The
only place which we can't change is struct duid's en.id, as that is _packed_
and public API, so we can't enforce alignment of the "id" field and have to
use memcpy instead.
Improve and enhance the path_id udev builtin to correctly handle bus'
available on Linux on z Systems (s390).
Previously, the CCW bus and, in particular, any FCP devices on it, have
been treated separately. This commit integrates the CCW bus into the
device chain loop. FCP devices and their associated SCSI disks are now
handled through the common SCSI handling functions in path_id.
This implies also a change in the naming of the symbolic links created
by udev. So any backports of this commit to existing Linux distribution
must be done with care. If a backport is required, a udev rule must be
created to also create the "old-style" symbolic links.
Apart from the CCW bus, this commit adds bus support for the:
- ccwgroup bus which manages network devices, and
- ap bus which manages cryptographic adapters
- iucv bus which manages IUCV devices on z/VM
There are more than enough calls doing string manipulations to deserve
its own files, hence do something about it.
This patch also sorts the #include blocks of all files that needed to be
updated, according to the sorting suggestions from CODING_STYLE. Since
pretty much every file needs our string manipulation functions this
effectively means that most files have sorted #include blocks now.
Also touches a few unrelated include files.
We don't use that anywhere any more. With the introduction of alias names it
also is not a proper mapping any more as several keys (e. g. KEY_COFFEE and
KEY_SCREENLOCK) have the same numerical mapping.
While it is currently possible to either not set MACAddressPolicy or set
it to a value different from "persistent" or "random", it is not obvious
that a user can do so. Add a policy, "none", which simply retains kernel
MAC addresses (same as not filling in the policy at all) and document it
so that users are aware of this setting.
Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
Use %m where previously %s was used together with strerrno().
Fixes: e53fc357a9 "tree-wide: remove a number of invocations of
strerror() and replace by %m"
The TAG key can be used in rules for event matching. At the moment, it
does not support inequality tests. This patch enhances the key test to
validate the rule if it does not contain a given TAG (by TAG!="value").
Signed-off-by: Felipe Franciosi <felipe@paradoxo.org>
Turns this:
r = -errno;
log_error_errno(errno, "foo");
into this:
r = log_error_errno(errno, "foo");
and this:
r = log_error_errno(errno, "foo");
return r;
into this:
return log_error_errno(errno, "foo");
This seems to be an oversight from:
707b66c663
We have to return ENODATA instead of ENOENT if a requested entry is
non-present. Also fix the call-site in udev to check for these errors.
The recent cgroup-rework changed the error code for un-mounted cgroupfs to
ENOEXEC. Make sure udev ignores it just like ENOENT and does not spill
warnings on the screen.
Virtio buses are undeterministically enumerated, so we cannot use them as a basis
for deterministic naming (see bf81e792f3). However, we are guaranteed that there
is only ever one virtio bus for every parent device, so we can simply skip over
the virtio buses when naming the devices.
The partition-type flags are defined independently for every partition-type. Apply
them only to the types where they are defined, and not to the ESP, which does not
appear to share the same set of flags.
https://github.com/systemd/systemd/issues/920
- Add smack xattr lookup table
- Unify all of mac_smack_apply_xxx{_fd}() to mac_smack_apply() and
mac_smack_apply_fd().
- Add smack xattr read apis similar with apply apis as
mac_smack_read{_fd}().
Previously, if the event loop never ran before sd_event_now() would
fail. With this change it will instead fall back to invoking now(). This
way, the function cannot fail anymore, except for programming error when
invoking it with wrong parameters.
This takes into account the fact that many callers did not handle the
error condition correctly, and if the callers did, then they kept simply
invoking now() as fall back on their own. Hence let's shorten the code
using this call, and make things more robust, and let's just fall back
to now() internally.
Whether now() is used or the cache timestamp may still be detected via
the return value of sd_event_now(). If > 0 is returned, then the fall
back to now() was used, if == 0 is returned, then the cached value was
returned.
This patch also simplifies many of the invocations of sd_event_now():
the manual fall back to now() can be removed. Also, in cases where the
call is invoked withing void functions we can now protect the invocation
via assert_se(), acknowledging the fact that the call cannot fail
anymore except for programming errors with the parameters.
This change is inspired by #841.
free() cannot be used with const pointers. However, our _cleanup_free_
handler features cast logic that hides that qualifier, so we don't get a
warning.
The latest consolidation cleanup of write_string_file() revealed some users
of that helper which should have used write_string_file_no_create() in the
past but didn't. Basically, all existing users that write to files in /sys
and /proc should not expect to write to a file which is not yet existant.
Merge write_string_file(), write_string_file_no_create() and
write_string_file_atomic() into write_string_file() and provide a flags mask
that allows combinations of atomic writing, newline appending and automatic
file creation. Change all users accordingly.
Due to our _cleanup_ usage for the udev manager, it will be destroyed
after the "exit:" label has finished. Therefore, it is the last
destruction done in main(). This has two side-effects:
- mac_selinux is destroyed before the udev manager is, possible causing
use-after-free if the manager-cleanup accesses selinux data
- log_close() is called *before* the manager is destroyed, possibly
re-opening the log if you use --debug (and thus not re-applying the
--debug option)
Avoid this by moving the manager-handling into a new function called
run(). This function will be left before we enter the "exit:" label in
main(), hence, the manager object will be destroyed early.
Push the extraction of the envp + argv as close as possible to their use, to avoid code
duplication. As a sideeffect fix logging when delaing execution.
Commit v218-247-g11c6f69 broke the output of the utility. "%1$" PRIu64
"x" expands to "%1$lux", essentially "%lux", which shows the problem.
u and x cannot be combined, u wins as the type character, and x gets
emitted verbatim to stdout.
References: https://bugzilla.redhat.com/show_bug.cgi?id=1227503
Make sure we never close fds before we drop their related event-source.
This will cause horrible disruptions if the fd-num is re-used by someone
else. Under normal conditions, this should not cause any problems as the
close() will drop the fd from the epoll-set automatically. However, this
changes if you have any child processes with a copy of that fd.
This fixes issue #163.
Background:
If you create an epoll-set via epoll_create() (lets call it 'EFD')
you can add file-descriptors to it to watch for events. Whenever
you call EPOLL_CTL_ADD on a file-descriptor you want to watch, the
kernel looks up the attached "struct file" pointer, that this FD
refers to. This combination of the FD-number and the "struct file"
pointer is used as key to link it into the epoll-set (EFD).
This means, if you duplicate your file-descriptor, you can watch
this file-descriptor, too (because the duplicate will have a
different FD-number, hence, the combination of FD-number and
"struct file" is different as before).
If you want to stop watching an FD, you use EPOLL_CTL_DEL and pass
the FD to the kernel. The kernel again looks up your
file-descriptor in your FD-table to find the linked "struct file".
This FD-number and "struct file" combination is then dropped from
the epoll-set (EFD).
Last, but not least: If you close a file-descriptor that is linked
to an epoll-set, the kernel does *NOTHING* regarding the
epoll-set. This is a vital observation! Because this means, your
epoll_wait() calls will still return the metadata you used to
watch/subscribe your file-descriptor to events.
There is one exception to this rule: If the file-descriptor that
you just close()ed was the last FD that referred to the underlying
"struct file", then _all_ epoll-set watches/subscriptions are
destroyed. Hence, if you never dup()ed your FD, then a simple
close() will also unsubscribe it from any epoll-set.
With this in mind, lets look at fork():
Assume you have an epoll-set (EFD) and a bunch of FDs
subscribed to events on that EFD. If you now call fork(),
the new process gets a copy of your file-descriptor table.
This means, the whole table is copied and the "struct
file" reference of each FD is increased by 1. It is
important to notice that the FD-numbers in the child are
exactly the same as in the parent (eg., FD #5 in the child
refers to the same "struct file" as FD #5 in the parent).
This means, if the child calls EPOLL_CTL_DEL on an FD, the
kernel will look up the linked "struct file" and drop the
FD-number and "struct file" combination from the epoll-set
(EFD). However, this will effectively drop the
subscription that was installed by the parent.
To sum up: even though the child gets a duplicate of the
EFD and all FDs, the subscriptions in the EFD are *NOT*
duplicated!
Now, with this in mind, lets look at what udevd does:
Udevd has a bunch of file-descriptors that it watches in its
sd-event main-loop. Whenever a uevent is received, the event is
dispatched on its workers. If no suitable worker is present, a new
worker is fork()ed to handle the event. Inside of this worker, we
try to free all resources we inherited. However, the fork() call
is done from a call-stack that is never rewinded. Therefore, this
call stack might own references that it drops once it is left.
Those references we cannot deduce from the fork()'ed process;
effectively causing us to leak objects in the worker (eg., the
call to sd_event_dispatch() that dispatched our uevent owns a
reference to the sd_event object it used; and drops it again once
the function is left).
(Another example is udev_monitor_ref() for each 'worker' that is
also inherited by all children; thus keeping the udev-monitor and
the uevent-fd alive in all children (which is the real cause for
bug #163))
(The extreme variant is sd_event_source_unref(), which explicitly
keeps event-sources alive, if they're currently dispatched,
knowing that the dispatcher will free the event once done. But
if the dispatcher is in the parent, the child will never ever
free that object, thus leaking it)
This is usually not an issue. However, if such an object has a
file-descriptor embedded, this FD is left open and never closed in
the child.
In manager_exit(), if we now destroy an object (i.e., close its embedded
file-descriptor) before we destroy its related sd_event_source, then
sd-event will not be able to drop the FD from the epoll-set (EFD). This
is, because the FD is no longer valid at the time we call EPOLL_CTL_DEL.
Hence, the kernel cannot figure out the linked "struct file" and thus
cannot remove the FD-number plus "struct file" combination; effectively
leaving the subscription in the epoll-set.
Since we leak the uevent-fd in the children, they retain a copy of the FD
pointing to the same "struct file". Thus, the EFD-subscription are not
automatically removed by close() (as described above). Therefore, the main
daemon will still get its metadata back on epoll_watch() whenever an event
occurs (even though it already freed the metadata). This then causes the
free-after-use bug described in #163.
This patch fixes the order in which we destruct objects and related
sd-event-sources. Some open questions remain:
* Why does source_io_unregister() not warn on EPOLL_CTL_DEL failures?
This really needs to be turned into an assert_return().
* udevd really should not leak file-descriptors into its children. Fixing
this would *not* have prevented this bug, though (since the child-setup
is still async).
It's non-trivial to fix this, though. The stack-context of the caller
cannot be rewinded, so we cannot figure out temporary refs. Maybe it's
time to exec() the udev-workers?
* Why does the kernel not copy FD-subscriptions across fork()?
Or at least drop subscriptions if you close() your FD (it uses the
FD-number as key, so it better subscribe to it)?
Or it better used
FD+"struct file_table*"+"struct file*"
as key to not allow the childen to share the subscription table..
*sigh*
Seems like we have to live with that API forever.
This ports a lot of manual code over to sigprocmask_many() and friends.
Also, we now consistly check for sigprocmask() failures with
assert_se(), since the call cannot realistically fail unless there's a
programming error.
Also encloses a few sd_event_add_signal() calls with (void) when we
ignore the return values for it knowingly.
PROGRAM and IMPORT{program} uses the exit code of the spawn process to decide if a rule matches or not,
a failing process is hence normal operation and not something we should warn about.
We still warn about other types of failing processes.
Now that listen_fds() have been split out, we can safely move the allocation
of the manager object after doing the forking (the fork is done to notify legcay
init-systems that the fds are ready).
Subsequently, we can merge manager_listen() back into managre_new().
This entails a minor behaviour change: the application of permissions to
static device nodes now happens after the fork (but still before notifying
systemd about being ready).
This will simply silently fail on non-systemd systems, so there is no reason
to make it conditional.
Also make it clear that we notify systemd about being ready as the last step
before starting the event loop, whereas the forking might need to happen
earlier.
This should have no behavioural change, but it is odd to tie the cgroup cleaning to
whether or not we are passed sockets.
The point really is if we are guaranteed to be in a dedicated cgroup, so instead
check for our parent being PID1 (we already implicitly only do this on systemd
systems).
We used to block all signals, and restore the original signal mask before exec'ing
external processes.
Now we just block the signals we care about and unconditionally unblock all signals
before exec'ing.
A lot of touch screens use INPUT_PROP_DIRECT to indicate that touch input
maps directly to the underlying screen, while the BTN_TOUCH bit might not be
set.
This change switches to bools and separates bit flag evaluation from
decision making and application of udev properties, while hopefully
keeping the same semantics. Apart from using BTN_LEFT instead of BTN_MOUSE
for mouse detection.
The communication channels must all be opened before forknig in daemon mode,
or we cannot guarantee that udevadm will work correctly as soon as udevd is
started.
Only log about starting in daemon mode, rely on PID1 to log this in notify mode. Also
explicitly set the STATUS variable, as is done in notify mode as is done for other
serivecs.
This allows us to drop the special sigterm handling in spawn_wait()
as this will now be passed directly to the worker event loop.
We now log failing spawend processes at 'warning' level, and timeouts
are in terms of CLOCK_BOOTTIME when available, otherwise the behavior
is unchanged.
Rather than trying to schedule new events on every main-loop iteration, do it explicitly when
processing an event finishes, a worker is killed, a new uevent is received, or the event queue
is explicitly restarted.
The behavior is mostly unchanged, but rather than only ever calling these functions at
fixed points in the event loop, they are called directly whenever they are invoked.
This partly reverts:
commit 6d1b1e0bc6
Author: Tom Gundersen <teg@jklm.no>
Date: Sun May 24 15:10:04 2015 +0200
udevd: worker - fully clean up unnecessary fds
The inotify-fd _is_ used in the workers, so don't close it! Have a look at
udev-watch.c, which keeps track of the inotify-fd as a global variable
(ugh!).
We would enforce that events could only be added to the queue from the
main process, but that brake in daemonized mode. Relax the restriction
to only allow one process to add events to the queue.
Reported by Mantas Mikulėnas.
The original code used fread(), which on some libc implementions
(ie glibc 2.17) would pre-read a full 4K (PAGE_SIZE) of the
PCI config space, when only 64 bytes were requested.
I have recently come across PCIe hardware which responds with
Completion Timeouts when accesses above 256 bytes are attempted.
This can cause server systems with GHES/AEPI support to cause
and immediate kernel panic due to the failed PCI transaction.
This change replaces the buffered fread() with an explict
unbuffered read() of 64 bytes, which corrects this issue by
only reading the guaranteed first 64 bytes of PCIe config space.
The parser used for MTU and Speed expects them to be size_t, not unsigned int.
This caused a corruption in the rest of the structure.
Reported by David O Neill <david.m.oneill@intel.com>.
We were returning rather than continuing in some cases. The intention
was always to fully process all pending events before returning
from the SIGCHLD handler. Restore this behaviour.
This way it is more obvious that the queue flag file is always
up-to-date. Moreover, we only have to touch/unlink it when the
first/last event is allocated/freed.
This avoids updating the flag files twice for every loop, and also removes another dependency
in the main-loop, so we are freer to reshufle it as we want.
Rather than skippling ctrl handling whenever we have handlede inotify events
(and hence may have synthesized a 'change' event), just call the uevent
handling explicitly from on_inotify() so that the event queue is up-to-date.
Make the worker context have the same life-span as the worker process. It is created on fork()
and free'd on SIGCHLD.
The change means that we can get worker_returned() for a worker context that is no longer around,
this is not a problem and we can just drop the message. The only use for worker_returned() is to
know to reschedule events to workers that are still around, so if the worker has already exited
it is not important to keep track of. We still print a debug statement in this case to be on the
safe side.
If the main daemon is not notified about a worker finishing an event
the refcounting of the worker struct will be wrong, and we will lose
track of the number of children we have to wait for.
This should not happen, but if it does we better complain loudly about
it. Worst case udev will wait for 30 seconsd at shutdown waiting for
nonexistent workers.
Remove some redundant logging, and reduce the log-level in most cases. The only
case that is really critical is if a worker failed while hanlding an event, so
keep that at error level.
This reverts b67f944. Lazy loading of device properties does not work for devices
that are received over netlink, as these are sealed. Reinstate the unconditional
loading of the device db.
Reported by: Mantas Mikulėnas <grawity@gmail.com>.
When running udevadm settle --timeout=0, the ping always times out, and
udevadm will return 0 without checking the queue state.
(David: Use a reasonable timeout to still get the barrier provided by
ctrl-ping)
IBM / Lenovo trackpoints allow specifying a sensitivity setting through a
ps/2 command, which changes the range of the deltas sent when using the
trackpoint.
On some models with normal usage only deltas of 1 or 2 are send, resulting in
there only being 2 mouse cursor movement speeds, rather than the expected fluid
scale. Changing the sensitivity to a higher level than the bootup default fixes
this.
This commit adds support for setting a POINTINGSTICK_SENSITIVITY value
in hwdb to allow changing the sensitivity on boot through udev / hwdb.
udevadm manual says:
A value of 0 will check if the queue is empty and always return
immediately.
However, currently we ignore the deadline if the value is 0, and wait
without any limit.
Zero timeout behaved according to the documentation until commit
ead7c62ab7 (udevadm: settle - kill alarm()). Looking at this patch, it
seems that the behavior change was unintended.
This patch restores the documented behavior.
The Trust TB7300 (relabelled Waltop?) tablet has a scrollwheel which shows
up as a /dev/input/event# node all by itself. Currently input_id does not
set any ID_INPUT_FOO attr on this causing it it to not be recognized by
Xorg / libinput.
This commit fixes this by marking it with ID_INPUT_KEY.
Reported-by: Sjoerd Timmer <themba@randomdata.nl>
- No need to add "Error, " prefix, we already have that as metadata.
- Also use double quotes for path names, as in most other places.
- Remove stray newline at end of message.
- Downgrade error messages after which we continue to warnings.
udev uses inotify to implement a scheme where when the user closes
a writable device node, a change uevent is forcefully generated.
In the case of block devices, it actually requests a partition rescan.
This currently can't be synchronized with "udevadm settle", i.e. this
is not reliable in a script:
sfdisk --change-id /dev/sda 1 81
udevadm settle
mount /dev/sda1 /foo
The settle call doesn't synchronize there, so at the same time we try
to mount the device, udevd is busy removing the partition device nodes and
readding them again. The mount call often happens in that moment where the
partition node has been removed but not readded yet.
This exact issue was fixed long ago:
http://git.kernel.org/cgit/linux/hotplug/udev.git/commit/?id=bb38678e3ccc02bcd970ccde3d8166a40edf92d3
but that fix is no longer valid now that sequence numbers are no longer
used.
Fix this by forcing another mainloop iteration after handling inotify events
before unblocking settle. If the inotify event caused us to generate a
"change" event, we'll pick that up in the following loop iteration, before
we reach the end of the loop where we respond to settle's control message,
unblocking it.
Commit 9ea28c55a2 (udev: remove seqnum API and all assumptions about
seqnums) introduced a regresion, ignoring the timeout option when
waiting until the event queue is empty.
Previously, if the udev event queue was not empty when the timeout was
expired, udevadm settle was returning with exit code 1. To check if the
queue is empty, you could invoke udevadm settle with timeout=0. This
patch restores the previous behavior.
(David: fixed timeout==0 handling and dropped redundant assignment)
Parse properties in the form
EVDEV_ABS_00="<min>:<max>:<res>:<fuzz>:<flat>"
and apply them to the kernel device. Future processes that open that device
will see the updated EV_ABS range.
This is particularly useful for touchpads that don't provide a resolution in
the kernel driver but can be fixed up through hwdb entries (e.g. bcm5974).
All values in the property are optional, e.g. a string of "::45" is valid to
set the resolution to 45.
The order intentionally orders resolution before fuzz and flat despite it
being the last element in the absinfo struct. The use-case for setting
fuzz/flat is almost non-existent, resolution is probably the most common case
we'll need.
To avoid multiple hwdb invocations for the same device, replace the
hwdb "keyboard:" prefix with "evdev:" and drop the separate 60-keyboard.rules
file. The new 60-evdev.rules is called for all event nodes
anyway, we don't need a separate rules file and second callout to the hwdb
builtin.
No changes in the mapping, but previously we opened the device only on
successful parsing. Now we open the mapping as soon as we have a value that
looks interesting. Since errors are supposed to be the exception, not the
rule, this is probably fine.
Rather than building a map and looping through the map, immediately call the
ioctl when we have a successfully parsed property.
This has a side-effect: before the maximum number of ioctls was limited to the
size of the map (1024), now it is unlimited.
input_id already (tries to) tag accelerometers as such, but this only works
for absolute accelerometers. Recent kernels mark accelerometers through an
input prop. Trust that prop and always tag devices with it with
ID_INPUT_ACCELEROMETER.
Note that detection by the prop bit works the same as the existing detection
and will ensure that no other tags get set on the device.
Also referred to as trackpoint, trackstick. These are marked by recent kernels
through an input prop. Forward that prop as udev property so userspace can
easily determine whether there is a pointing stick present.
These devices were previously marked as ID_INPUT_MOUSE, for backwards
compatibility we keep that in place, the new property is an addition.
also removes this warning:
src/udev/cdrom_id/cdrom_id.c: In function ‘cd_media_info.isra.13’:
src/udev/cdrom_id/cdrom_id.c:612:12: warning: assuming signed overflow
does not occur when assuming that (X + c) >= X is always true
[-Wstrict-overflow]
static int cd_media_info(struct udev *udev, int fd)
^
like:
src/shared/install.c: In function ‘unit_file_lookup_state’:
src/shared/install.c:1861:16: warning: ‘r’ may be used uninitialized in
this function [-Wmaybe-uninitialized]
return r < 0 ? r : state;
^
src/shared/install.c:1796:13: note: ‘r’ was declared here
int r;
^
it is ironic that
"The only purpose of this structure is to cast the structure pointer
passed in addr in order to avoid compiler warnings. See EXAMPLE below."
from bind(2)
