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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.
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Alternatively, this could perhaps be removed since it was broken for a
long time and noone seemed to care.
But it was helpful for me today.
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This mirrors what we do in now().
CID #1351755.
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CID #1351429.
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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.
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https://github.com/systemd/systemd/pull/2508#issuecomment-190901170
Maybe fixes https://bugzilla.redhat.com/show_bug.cgi?id=1308771.
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udev-rules cleanup fix
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faccessat returns 0 on success.
A cosmetic fix is also included: the slash was doubled unnecessarily.
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lldp fixes, second iteration
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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.
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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.
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CID #1313566.
Also, change the return value to void, because it is ignored anyway.
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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.
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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.
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Fixes fall-out from 8b3aa503c171acdb9ec63484a8c50e2680d31e79.
Fixes: #2635
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This should be handled fine now by .dir-locals.el, so need to carry that
stuff in every file.
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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.html
Fixes #2501
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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.
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Let's not accept onboard interface indexes, that are so high that they are obviously non-sensical.
Fixes: #2407
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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.
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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.
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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 bcb161b0230f.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61846
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Also add a coccinelle receipt to help with such transitions.
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Use BTN_TOUCH or INPUT_PROP_DIRECT to detect touch screens.
Signed-off-by: Andreas Pokorny <andreas.pokorny@canonical.com>
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Udev indentation
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Otherwise emacs wants to use 2-space indentation and other
attrocities.
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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
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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.
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tree-wide: group include of libudev.h with sd-*
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Sort the includes accoding to the new coding style.
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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.
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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
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[v2] treewide: treatment of errno and other cleanups
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with small manual cleanups for style.
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Our functions return negative error codes.
Do not rely on errno being set after calling our own functions.
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