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CNAME records are special in the way they are treated by DNS servers,
and our cache should mimic that behavior: In case a domain name has an
alias, its CNAME record is returned in place of any other.
Our cache was not doing this despite caching the CNAME records, this
entailed needless lookups to re-resolve the CNAME.
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Only one key is allowed per transaction now, so let's simplify things and only allow putting
one question key into the cache at a time.
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Takes a key and CNAME RR and returns the canonical RR of the right
type. Make use of this in dns_question_redirect().
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Creates a new CNAME RR key with the same class and name as an existing key.
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It's nicer if the assertion failure message from a bad use of xsprintf
actually mentions xsprintf instead of the expression the macro is
implemented as.
The assert_message_se macro was added in the previous commit as an
internal helper, but it can also be used for customizing assertion
failure messages like in this case.
Example:
char buf[10];
xsprintf(buf, "This is a %s message.\n", "long");
Before:
Assertion '(size_t) snprintf(buf, ELEMENTSOF(buf), "This is a %s
message.\n", "long") < ELEMENTSOF(buf)' failed at foo.c:6, function
main(). Aborting.
After:
Assertion 'xsprintf: buf[] must be big enough' failed at foo.c:6,
function main(). Aborting.
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Make sure the assert expression is not macro-expanded before
stringification. This makes several assertion failure messages more
readable.
As an example:
assert(streq("foo", "bar"));
I'd rather see this:
Assertion 'streq("foo", "bar")' failed at foo.c:5, function main(). Aborting.
...than this, though awesome, incomprehensible truncated mess:
Assertion '(__extension__ ({ size_t __s1_len, __s2_len; (__builtin_constant_p ((
"foo")) && __builtin_constant_p (("bar")) && (__s1_len = strlen (("foo")), __s2_
len = strlen (("bar")), (!((size_t)(const void *)((("foo")) + 1) - (size_t)(cons
t void *)(("foo")) == 1) || __s1_len >= 4) && (!((size_t)(const void *)((("bar")
) + 1) - (size_t)(const void *)(("bar")) == 1) || __s2_len >= 4)) ? __builtin_st
rcmp (("foo"), ("bar")) : (__builtin_constant_p (("foo")) && ((size_t)(const voi
d *)((("foo")) + 1) - (size_t)(const void *)(("foo")) == 1) && (__s1_len = strle
n (("foo")), __s1_len < 4) ? (__builtin_constant_p (("bar")) && ((size_t)(const
void *)((("bar")) + 1) - (size_t)(const void *)(("bar")) == 1) ? __builtin_strcm
p (("foo"), ("bar")) : (__extension__ ({ const unsigned char *__s2 = (const unsi
gned char *) (const char *) (("bar")); int __result = (((const unsigned char *)
(const char *) (("foo")))[0] - __s2[0]); if (__s1_len > 0 && __result == 0) { __
result = (((const unsigned char *) (const char *) (("foo")))[1] - __s2[1]); if (
__s1_len > 1 && __result == 0) { __result = (((const unsigned char *) (const cha
r *) (("foo")))[2] - __s2[2]); if (__s1_len > 2 && __result == 0) __result = (((
const unsigned char *) (const char *) (("foo")))[3] - __s2[3]); } } __result; })
)) : (__builtin_constant_p (("bar")) && ((size_t)(const void *)((("bar")) + 1) -
(size_t)(const void *)(("bar")) == 1) && (__s2_len = strlen (("bar")), __s2_len
< 4) ? (__builtin_constant_p (("foo")) && ((size_t)(const void *)((("foo")) + 1
) - (size_t)(const void *)(("foo")) == 1) ? __builtin_strcmp (("foo"), ("bar"))
: (- (__extension__ ({ const unsigned char *__s2 = (const unsigned char *) (cons
t char *) (("foo")); int __result = (((const unsigned char *) (const char *) (("
bar")))[0] - __s2[0]); if (__s2_len > 0 && __result == 0) { __result = (((const
unsigned char *) (const char *) (("bar")))[1] - __s2[1]); if (__s2_len > 1 && __
result == 0) { __result = (((const unsigned char *) (const char *) (("bar")))[2]
- __s2[2]); if (__s2_len > 2 && __result == 0)
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Using ELEMENTSOF on a pointer will result in a compilation error.
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Hook more properties for transient units
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Let's make sure that we follow the same codepaths when adjusting a
cgroup property via the dbus SetProperty() call, and when we execute the
StartupCPUShares= effect.
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value for a reason
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In all occasions when this function is called we do so anyway, so let's
move this inside, to make things easier.
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Not strictly necessary, but makes clear the fds are invalidated. Make
sure we do the same here as in most other cases.
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There's a good chance we never needs these sets, hence allocate them
only when needed.
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Let's stop using the "unsigned long" type for weights/shares, and let's
just use uint64_t for this, as that's what we expose on the bus.
Unify parsers, and always validate the range for these fields.
Correct the default blockio weight to 500, since that's what the kernel
actually uses.
When parsing the weight/shares settings from unit files accept the empty
string as a way to reset the weight/shares value. When getting it via
the bus, uniformly map (uint64_t) -1 to unset.
Open up StartupCPUShares= and StartupBlockIOWeight= to transient units.
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This was used by consoled, which was removed, let's remove this too now.
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systemd-run can now launch units with PrivateTmp, PrivateDevices,
PrivateNetwork, NoNewPrivileges set.
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loginctl: print nontrivial properties in logictl show-*
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systemctl: fix various aspects of polkit authorization in legacy tools.
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machine: when removing, renaming, cloning images also care for .nspaw…
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core: add support for the "pids" cgroup controller
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Drop usage of off_t
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This adds support for the new "pids" cgroup controller of 4.3 kernels.
It allows accounting the number of tasks in a cgroup and enforcing
limits on it.
This adds two new setting TasksAccounting= and TasksMax= to each unit,
as well as a gloabl option DefaultTasksAccounting=.
This also updated "cgtop" to optionally make use of the new
kernel-provided accounting.
systemctl has been updated to show the number of tasks for each service
if it is available.
This patch also adds correct support for undoing memory limits for units
using a MemoryLimit=infinity syntax. We do the same for TasksMax= now
and hence keep things in sync here.
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off_t is a really weird type as it is usually 64bit these days (at least
in sane programs), but could theoretically be 32bit. We don't support
off_t as 32bit builds though, but still constantly deal with safely
converting from off_t to other types and back for no point.
Hence, never use the type anymore. Always use uint64_t instead. This has
various benefits, including that we can expose these values directly as
D-Bus properties, and also that the values parse the same in all cases.
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systemctl: add RequisiteOf* as inverses of Requisite and RequisiteOverridable
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Third round of Coccinelle fixes
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Thus we allow (non-interactive) polkit auth to kick in for legacy commands
(halt, poweroff, reboot, telinit) as well.
Fixes (another aspect of) issue #213.
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Handle -EOPNOTSUPP and -EINPROGRESS like in start_special().
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Fixes (the main concern of) issue #213.
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And set_free() too.
Another Coccinelle patch.
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Another Coccinelle patch.
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settings file
Whenever we remove/rename/clone a machine image, make sure we do the
same for the image's .nspawn settings file.
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logind: make dry run command line arguments work again (v2)
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Prefix the action parameter with "dry-" in case the --dry-run command
line switch was passed.
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Allow passing a "dry-" prefix to the action parameter passed to
.ScheduleShutdown(). When strings with this prefix are passed,
the scheduled action will not take place. Instead, an info message
is logged.
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notify: log error when sd_pid_notify() == 0
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util: introduce safe_fclose() and port everything over to it
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Adds a coccinelle script to port things over automatically.
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locale: kill free_and_replace()
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That function really makes little sense, as the open-coded variant
is much more readable. Also, if the 2nd argument is NULL, mfree()
is a much better candidate.
Convert the only users of this function in localed, and then remove it
entirely.
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Coccinelle fixes 2
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Another Coccinelle script.
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