Looked for definitions of functions using the *_compare_func() suffix.
Tested:
- Unit tests passed (ninja -C build/ test)
- Installed this build and booted with it.
Macro returns -1, 0, 1 depending on whether a < b, a == b or a > b.
It's safe to use on unsigned types.
Add tests to confirm corner cases are properly covered.
Drop __extension__, since we don't use gcc -Wpedantic or -ansi.
Reformat code for spacing. Add spaces after commas almost everywhere.
Reindent code blocks in macro definitions, for consistency.
When clients don't follow protocol and use the same object from
different threads, then we previously would silently corrupt memory.
With this assert we'll fail with an assert(). This doesn't fix anything
but certainly makes mis-uses easier to detect and debug.
Triggered by https://bugzilla.redhat.com/show_bug.cgi?id=1609349
This flag mimics what "O_NOFOLLOW|O_PATH" does for open(2) that is
chase_symlinks() will not resolve the final pathname component if it's a
symlink and instead will return a file descriptor referring to the symlink
itself.
Note: if CHASE_SAFE is also passed, no safety checking is performed on the
transition done if the symlink would have been followed.
machined exposes the pseudo-container ".host" as a reference to the host
system, and this means "machinectl login .host" and "machinectl shell
.host" get your a login/shell on the host. systemd-run currently doesn't
allow that. Let's fix that, and make sd-bus understand ".host" as an
alias for connecting to the host system.
If 'v' is negative, it's wrong to add the decimal to it, as we'd
actually need to subtract it in this case. But given that we don't want
to allow negative vaues anyway, simply check earlier whether what we
have parsed so far was negative, and react to that before adding the
decimal to it.
We often open the parent directory of a path. Let's add a common helper
for that, that shortens our code a bit and adds some extra safety
checks, for example it will fail if used on the root directory (which
doesn't really have a parent).
The helper is actually generalized from a function in btrfs-util.[ch]
which already existed for this purpose.
Remove "arbitrary named hierarchies" from the list of things that
cg_kernel_controllers() might return, and clarify that "name="
pseudo-controllers are not included in the returned list.
/proc/cgroups does not contain "name=" pseudo-controllers, and
cg_kernel_controllers() makes no effort to enumerate them via a different
mechanism.
These custom macros make the expression go through a function, in order
to prevent ASSERT_SIDE_EFFECT false positives on our macros such as
assert_se() and assert_return() that cannot be disabled and will always
evaluate their expressions.
This technique has been described and recommended in:
https://community.synopsys.com/s/question/0D534000046Yuzb/suppressing-assertsideeffect-for-functions-that-allow-for-sideeffects
Tested by doing a local cov-build and uploading the resulting tarball to
scan.coverity.com, confirmed that the ASSERT_SIDE_EFFECT false positives
were gone.
key_serial_t is defined in keyutil.h, which wasn't included in the header list
in the test, so the test always failed. We were always compiling stuff with
!HAVE_KEY_SERIAL_T.
We could try to add keyutil.h to the test, but then we'd have to first check if
it is available, which just doesn't seem worth the trouble.
key_serial_t should always be defined as int32_t. Let's keep the uncoditional
define, since repeated compatible typedefs are not a problem, and it allows us
to compile even if the header file is missing. If there's ever a change in the
definition, we'll have to adjust the code for the different type anyway, and
our compiler will tell us.
Using _GNU_SOURCE is better because that's how we include the headers in the
actual build, and some headers define different stuff when it is defined.
sys/stat.h for example defines 'struct statx' conditionally.
Unfortunately this needs libshared to link to libkmod. Before it was linked
into systemd-udevd, udevadm, and systemd each seperately. On most systems this
doesn't make much difference, because at least systemd would be installed, but
it might not be in small chroots. It is a small library, so I hope this is not
a big issue.
Starting with glibc 2.27.9000-36.fc29, include file sys/stat.h will have a
definition for struct statx, in which case include file linux/stat.h should be
avoided, in order to prevent a duplicate definition.
In file included from ../src/basic/missing.h:18,
from ../src/basic/util.h:28,
from ../src/basic/hashmap.h:10,
from ../src/shared/bus-util.h:12,
from ../src/libsystemd/sd-bus/bus-creds.c:11:
/usr/include/linux/stat.h:99:8: error: redefinition of ‘struct statx’
struct statx {
^~~~~
In file included from /usr/include/sys/stat.h:446,
from ../src/basic/util.h:19,
from ../src/basic/hashmap.h:10,
from ../src/shared/bus-util.h:12,
from ../src/libsystemd/sd-bus/bus-creds.c:11:
/usr/include/bits/statx.h:36:8: note: originally defined here
struct statx
^~~~~
Extend our meson.build to look for struct statx when only sys/stat.h is
included and, in that case, do not include linux/stat.h anymore.
Tested that systemd builds correctly when using a glibc version that includes a
definition for struct statx.
glibc Fedora RPM update:
28cb5d31fc
glibc upstream commit:
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=fd70af45528d59a00eb3190ef6706cb299488fcd
Yu Watanabe