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The `coccinelle/take-fd.cocci` transformation file attempts to rewrite
r = fd;
fd = -1;
to
r = TAKE_FD(fd);
Unfortunately, using `identifier` or `idexpression` as a metavariable
type in this case wouldn't match more complex location descriptions,
like:
x->fd = fd
fd = -1;
Using 'expression' metavariable type generates false positives,
as you can't specify scope of such expression. The only real example
from the current codebase is the global 'errno' variable, which results
in following patch generated by `spatch`:
--- src/basic/errno-util.h
+++ /tmp/cocci-output-28263-971baa-errno-util.h
@@ -15,8 +15,7 @@ static inline void _reset_errno_(int *sa
#define UNPROTECT_ERRNO \
do { \
- errno = _saved_errno_; \
- _saved_errno_ = -1; \
+ errno = TAKE_FD(_saved_errno_); \
} while (false)
static inline int negative_errno(void) {
Let's explicitly state that the matched expression should not equal
'errno' to avoid this. It's not particularly nice, but it should be
enough, at least for now.
Coccinelle needs a custom isomorphism file with rules (isomorphisms) how
to correctly rewrite conditions with explicit NULL checks (i.e.
if (ptr == NULL)) to their shorter form (i.e. if (!ptr)). Coccinelle
already contains such isomorphisms in its default .iso file, however,
they're in the opposite direction, which results in useless output from
coccinelle/equals-null.cocci.
With this fix, `spatch` should no longer report patches like:
@@ -628,8 +628,9 @@ static int path_deserialize_item(Unit *u
f = path_result_from_string(value);
if (f < 0)
log_unit_debug(u, "Failed to parse result value: %s", value);
- else if (f != PATH_SUCCESS)
- p->result = f;
+ else {if (f != PATH_SUCCESS)
+ p->result = f;
+ }
} else
log_unit_debug(u, "Unknown serialization key: %s", key);
When booting with "udev.log-priority=debug" for example, the output might be
spammed with messages like this:
systemd-udevd[23545]: maximum number (248) of children reached
systemd-udevd[23545]: maximum number (248) of children reached
systemd-udevd[23545]: maximum number (248) of children reached
systemd-udevd[23545]: maximum number (248) of children reached
systemd-udevd[23545]: maximum number (248) of children reached
systemd-udevd[23545]: maximum number (248) of children reached
systemd-udevd[23545]: maximum number (248) of children reached
While the message itself is useful, printing it per batch of events should be
enough.
By default, the available completions are sorted alphabetically, which
is counterproductive in case of syslog priorities. Override the default
behavior using the `nosort` option
When systemd is started, it detects initrd by checking for that file
The usage of that file is not documented anywhere, so mention it early
in the most relevant man-page I could find.
When we determine that a calendar expression cannot elapse anymore,
print a warning but proceed regardless like we normally would.
Quite possibly a remote system has a different understanding of time
(timezone, system clock) than we have, hence we really shouldn't change
behaviour here client side, but log at best, and then leave the decision
what to do to the server side.
Follow-up for #12299
Coverity doesn't like the fact that unit_get_cgroup_context() returns NULL for
unit types that don't have a CGroupContext. We don't expect to call those
functions with such unit types, so this isn't an immediate problem, but we can
make things more robust by handling this case.
CID #1400683, #1400684.
- bridge or bonding master takes a reference of slave links.
- drop link from bridge or bonding master's slave list when slave link
is removed.
- change type of Link::slaves to Set*,
Fixes#12315.
When a uevent is received during the relevant interface is in
LINK_STATE_PENDING, then the interface may be initialized twice.
To prevent that, this introduces LINK_STATE_INITIALIZED.
https://github.com/systemd/systemd/issues/7153#issuecomment-485252308
Apparently this is still confusing for people.
Longer-term, I think we should just make BindMount= automatically "upgrade"
(or "downgrade", depending on how you look at this), any InaccessiblePath=
mountpoints to "tmpfs". I don't see much point in forcing users to remember
this interaction. But let's at least document the status quo, we can always
update the docs if the code changes.
A service might be able to detect errors by itself that may require the
system to take the same action as if the service locked up. Add a
WATCHDOG=trigger state change notification to sd_notify() to let the
service manager know about the self-detected misery and instantly
trigger the configured watchdog behaviour.
This wraps a few common steps. It is defined as inline function instead of in a
.c file to avoid having a .c file. With a .c file, we would have three choices:
- either link it into libshared, but then then libshared would have to be
linked to libmount.
- or compile the .c file into each target separately. This has the disdvantage
that configuration of every target has to be updated and stuff will be compiled
multiple times anyway, which is not too different from keeping this in the
header file.
- or create a new convenience library just for this. This also has the disadvantage
that the every target would have to be updated, and a separate library for a
10 line function seems overkill.
By keeping everything in a header file, we compile this a few times, but
otherwise it's the least painful option. The compiler can optimize most of the
function away, because it knows if 'source' is set or not.
Same motivation as in other places: let's use a single logic to parse this.
Use path_equal() to compare the path.
A bug in error handling is fixed: if we failed after the GREEDY_REALLOC but
before the line that sets the last item to NULL, we would jump to
_cleanup_strv_free_ with the strv unterminated. Let's use GREEDY_REALLOC0
to avoid the issue.
It seems better to use just a single parsing algorithm for /proc/self/mountinfo.
Also, unify the naming of variables in all places that use mnt_table_next_fs().
It makes it easier to compare the different call sites.
The interface provided by those two functions is huge, so this text could
probably be made two or three times as long if all details were described.
But I think it's a good start.
This wraps the call to org.freedesktop.DBus.Introspectable.Introspect.
Using "busctl call" directly is inconvenient because busctl escapes the
string before printing.
Example:
$ busctl introspect --xml org.freedesktop.systemd1 /org/freedesktop/systemd1 | pygmentize -lxml | less -RF
test-bus-introspect is also applied to the tables from test-bus-vtable.c.
test-bus-vtable.c is also used as C++ sources to produce test-bus-vtable-cc,
and our hashmap headers are not C++ compatible. So let's do the introspection
part only in the C version.
