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_unused_ means "the variable is meant to be possible unused and gcc
will not generate a warning about it", which is exactly what we need here,
since we're only declaring it for the side effect of _cleanup_.
clang warns about a few sites like this:
../src/journal/journal-file.c:1780:48: warning: taking address of packed member 'entry_offset' of class or structure 'DataObject' may result in an unaligned pointer value [-Waddress-of-packed-member]
&o->data.entry_offset,
^~~~~~~~~~~~~~~~~~~~
but DataObject.entry_offset will always be 8-byte aligned as long as
the DataObject structure is aligned. Similarly in other cases, the
field is always aligned. Let's just silence the warning to avoid noise.
gcc does not know -Waddress-of-packed-member, and would warn about an unknown
warning, so we need to conditionalize on __clang__.
../src/network/networkd-link.c:3577:84: warning: format specifies type 'unsigned char' but the argument has type 'uint32_t' (aka 'unsigned int') [-Wformat]
route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
^~~~~~~~~~~~
../src/network/networkd-manager.c:1146:132: warning: format specifies type 'unsigned char' but the argument has type 'uint32_t' (aka 'unsigned int') [-Wformat]
rule->from_prefixlen, space ? " " : "", to_str, rule->to_prefixlen, rule->tos, rule->fwmark, rule->fwmask, rule->table);
^~~~~~~~~~~
Also add some line breaks to make it easier to see which argument is for which
part of the format string.
clang warns:
../src/import/importd.c:254:70: warning: 'break' is bound to current loop, GCC binds it to the enclosing loop [-Wgcc-compat]
while ((e < t->log_message + t->log_message_size) && IN_SET(*e, 0, '\n'))
^
Let's just play it safe and not use IN_SET here.
../src/journal/journald-native.c:341:13: warning: variable 'context' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
if (ucred && pid_is_valid(ucred->pid)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/journal/journald-native.c:350:42: note: uninitialized use occurs here
context, ucred, tv, label, label_len);
^~~~~~~
../src/journal/journald-native.c:335:31: note: initialize the variable 'context' to silence this warning
ClientContext *context;
^
= NULL
Very nice reporting!
Functions that we call can handle context == NULL, so it's enough to simply
initialize the variable.
Failure to spawn ExecStartPost was being handled differently to e.g.
EXIT_FAILURE returned by ExecStartPost. It looks like this was an
oversight. Fix to match documented behaviour.
`man systemd.service`:
> Note that if any of the commands specified in ExecStartPre=, ExecStart=,
> or ExecStartPost= fail (and are not prefixed with "-", see above) or time
> out before the service is fully up, execution continues with commands
> specified in ExecStopPost=, the commands in ExecStop= are skipped.
Update the timeout warnings for remount and unmount. For consistency with
mount, for accuracy, and for consistency with their equivalents in
service.c.
manager_connect_bus() is called *before* manager_coldplug(). As a last
thing in service_coldplug() we set service state to
s->deserialized_state, and thus before we do that all services are
inactive and try_connect always evaluates to false. To fix that we must
look at deserialized state instead of current unit state.
Fixes#7146
Using `kill()` with a signal of 0 is a slightly more documented idiom for
checking whether a process still exists. It is mentioned explicitly in
man pages. This avoids the need to comment the call as "misuse".
A comment is still necessary - in fact this idiom is even more confusing if
you don't know how it works. But it's easy enough to explain.
The GP-electronic T701 has its LCD panel mounted upside-down, initially
my plan was to fix this by transparently rotating the image in the i915
driver (my "drm/i915: Deal with upside-down mounted LCD" patch), but
that approach has been rejected instead the kernel will now export
a "panel orientation" property on the drm-connector for the panel and
let userspace deal with it.
Since the upside-down-ness of the panel is now no longer transparently
hidden from userspace, the current accel mount quirk for the T701 needs
to be updated to take the upside-down-ness into account.
Freescale IMX SoCs serial ports driven by kernel "imx-uart" driver have
names of "ttymxcN", let's add this pattern to an udev rule for serial
ports so they will have proper ownership applied.
The input_id builtin assigns the various ID_INPUT based on the exported evdev
bits. In some cases, the device may not have the properties required to label
a device as one specific type but the physical form factor is clear.
e.g. in the case of #7197 it's a tablet pad that does not have x/y axes which
the kernel exports for pads for historical reasons.
A custom override is needed, best to be solved with a hwdb entry.
Related #7197
https://www.freedesktop.org/wiki/Software/systemd/SystemUpdates/
> This document has been replaced by systemd.offline-updates(7) man page.
It's weird to visit the first "see also", and find that it is what the manpage replaces (and looks very similar). Surely we should remove this link.
This option allows restricting the shown fields in the output modes that
would normally show all fields. It allows clients that are only
interested in a subset of the fields to access those more efficiently.
Also, it makes the resulting size of the output more predictable.
It has no effect on the various `short` output modes, because those
already only show a subset of the fields.
This augments %t which already resolves to the runtime directory root, and
should be useful for units that want to pass any of these paths in
command line arguments.
Example:
ExecStart=/usr/bin/mydaemon --datadir=%S/mydaemon
Why not expose a specifier resolving directly to the configured
state/runtime/cache/log dir? Three reasons:
1. Specifiers should be independent of configuration of the unit itself,
and StateDirectory= and friends are unit configuration. See
03fc9c723c and related work.
2. We permit multiple StateDirectory= values per unit, and it hence
wouldn't be clear which one is passed.
3. We already have %t for the runtime directory root, and we should
continue with the same scheme.
This adds some simply detection logic for cases where dissection is
invoked on an externally created loop device, and partitions have been
detected on it, but partition scanning so far was off. If this is
detected we now print a brief message indicating what the issue is,
instead of failing with a useless EINVAL message the kernel passed to
us.
This adds some basic discovery of block device images for nspawn and
friends. Note that this doesn't add searching for block devices using
udev, but instead expects users to symlink relevant block devices into
/var/lib/machines. Discovery is hence done exactly like for
dir/subvol/raw file images, except that what is found may be a (symlink
to) a block device.
For now, we do not support cloning these images, but removal, renaming
and read-only flags are supported to the point where that makes sense.
Fixe: #6990
If we follow an absolute symlink there's no need to prefix the path with
a "/", since by definition it already has one.
This helps suppressing double "/" in resolved paths containing absolute
symlinks.
Some of the btrfs utility functions already used O_NOFOLLOW others
didn't. Let's streamline this, and refuse operation when we are called
for symlinks on "remove" and "snapshot" too.
In particular in the "remove" case following symlinks is a bad idea, and
is quite different from how unlink() and friends work, which always
remove the symlink, and not the destination, a logic we should follow
here too.
On some devices the display (LCD panel) is mounted non upright
in the device's casing, e.g. mounted upside-down or 90 degree rotated.
Document the expected ACCEL_MOUNT_MATRIX settings for such devices.
This fixes --read-only with --private-users. mkdir_userns_p may return
-EROFS if either mkdir or lchown fails; lchown failing is fine as the
mount point will just be overmounted, and if mkdir fails then the
following mount() will also fail (with ENOENT).
