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Binaries on the latest Arch Linux use `call` instructions instead of
`callq`, which breaks the ASan detection and eventually the image
building process (due to insufficient space).
Let's drop unused function arguments, and needless double pointers where
we can.
no actual change in behaviour, just simplifications
(I tried to track down #14026 without success, and this came out of it)
The implementation is a bit ugly because we set the output variable
twice. But we were already doing this on error, so this is not
significantly worse. Doing this allows us to avoid goto's, and the
compiler should be able to figure this out and only set once.
We'd return -1 (-EPERM), even though we have a general rule to use real errno
values. The particular case that caught my attention was:
$ sudo udevadm control -l asdf
Failed to parse log priority 'asdf': Operation not permitted
... but "git grep 'r =.*_from_string' src/" return 110 hits. Confusingly, some
of the _from_string functions already return a proper errno value, so not all
of those are broken, but probably quite a few.
As suggested in https://github.com/systemd/systemd/pull/11484#issuecomment-775288617.
This does not touch anything exposed in src/systemd. Changing the defines there
would be a compatibility break.
Note that tests are broken after this commit. They will be fixed in the next one.
A hole was/is present after the booleans, so changing them to be one byte each
doesn't change the structure size (122 bits on amd64). If we add more stuff
later, it might make sense to turn some of those into bitfields again. For now,
let's take the easy route. EINVAL fits into type now.
Code size it minimally reduced:
-rwxrwxr-x 1 zbyszek zbyszek 4109792 Feb 10 14:00 build/libsystemd.so.0.30.0
-rwxrwxr-x 1 zbyszek zbyszek 4109712 Feb 10 14:01 build/libsystemd.so.0.30.0
By rearranging the fields, we can avoid one of the holes (on amd64).
By adding more space for .type, -EINVAL can be used as a value later on.
The structure is reduced from 96 to 88 bytes (on amd64).
Text size is also smaller:
-rwxrwxr-x 1 zbyszek zbyszek 4109832 Feb 9 19:50 build/libsystemd.so.0.30.0
-rwxrwxr-x 1 zbyszek zbyszek 4109792 Feb 9 19:51 build/libsystemd.so.0.30.0
Every bitfield may make the object a little smaller, but requires additional
code when accessing the field. So it only makes sense in objects that are
created in many many copies. The Manager is pretty much a singleton.
-rwxrwxr-x 1 zbyszek zbyszek 4443840 Feb 9 16:14 build/systemd
-rwxrwxr-x 1 zbyszek zbyszek 4442552 Feb 9 16:42 build/systemd
We save 1288 bytes of code by "wasting" a few bytes on storage. (The speed
advantages are probably more important, but harder to measure…)
Doing it all in one line and with negation in front seemed like a good
idea at some point, but I think it is vastly easier to understand when
it is split out a bit.
This improves the output of the "list" and "info" verbs and adds
coredump size information to the output.
For doing that a common helper function is added that analyzes the
coredump file on disk.
Let's use our table formatter for generating the coredump table. Bring
support up to our current standards, with a bit of color, JSON output
and so on.
Also adds supports for setting a max for the number of lines to
generate. (with the new -n switch)
The existing -1 switch now becomes a synonym for "-n 1 --reverse"
Fixes: #3271
This way we can display invalid UIDs/GIDs/PIDs as n/a while still
storing them as is.
Also, let's add a new cell type for unix signal, that is stored as
integer, but displayed as signal name string.
systemd-inhibit when invoked with a command line will put the whole
command line in the "who" field of the inhibitor lock. This can get
extremely long for shell expressions, making the table "systemd-inhibit
--list" shows ridiculously weirdly formatted. Let's put a limit on the
column width: half of the screen, not more.
If one field in a specific column has a maximum size limit, other fields
in the same column might affected by it and get less than they asked
for. Let's make sure we can handle this, and don't assert on this
because surprisingly we got less than what we asked for.
Does what the name suggests. Obviously inspired by sudoers, but note that
our tools are not supposed to be installed suid, so there is no privilege
boundary to cross here.
We have a number of issues where oss-fuzz reports input-independent crashes of
fuzz-journal-remote. Instead of asserting that stuff that allocated fds and
memory never fails, let's instead just return an error.
https://oss-fuzz.com/testcase-detail/4791099424112640https://oss-fuzz.com/testcase-detail/4531912477638656
I don't see any docs as to whether LLVMFuzzerTestOneInput() is allowed to
return non-zero. Propagating the error code is easiest, so let's just do that.
If it turns out that this causes oss-fuzz to still report a failure, we can
suppress that later.
glibc 2.33-3 shipped on 2021-02-06 breaks running Arch containers on
systems with older kernels (like Ubuntu Focal). Until the issue is
resolved, let's pin the Arch repositories to glibc 2.32-5 to mitigate
the annoying CI fails.
See: https://bugs.archlinux.org/task/69563
