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The arguments have to be indentical everywhere, so let's use a macro to
make things more readable. But only in the headers, in the .c files let's
keep them verbose so that it's easy to see the argument list.
Coverity now started warning about this ("Calling unlinkat without checking
return value (as is done elsewhere 12 out of 15 times).", and it is right:
most of the time we should at list print a log message so people can figure
out something is wrong when this happens.
v2:
- use warning level in journald too (this is unlikely to happen ever, so it
should be safe to something that is visible by default).
This usually is very annoying to users who then cannot log in, so
make sure we always warn if that happens (selinux, or whatever other reason).
This reverts a790812cb349c5cef95d1b4a20fc80ca08d3a145.
This commint adds a new command line parameter to sytemd-coredump. The
parameter should be mappend to core_pattern's placeholder %h - hostname.
The field _HOSTNAME holds the name from the kernel's namespaces which might be
different then the one comming from process' namespaces.
It is true that the real hostname is usually available in the field
COREDUMP_ENVIRON (environment variables) but I believe it is more reliable to
use the value passed by kernel.
----
The length of iovec is no longer static and hence I corrected the declarations
of the functions set_iovec_field and set_iovec_field_free.
Thank you @yuwata and @poettering!
A couple of fixes:
1. always bzero_explicit() away what we remove from the passphrase
buffer. The UTF-8 code assumes the string remains NUL-terminated, and
we hence should enforce that. memzero() would do too here, but let's
be paranoid after all this is key material.
2. when clearing '*' characters from string, do so counting UTF-8
codepoints properly. We already have code in place to count UTF-8
codepoints when generating '*' characters, hence we should take the
same care when clearing them again.
3. Treat NUL on input as an alternative terminator to newline or EOF.
4. When removing characters from the password always also reset the
"codepoint" index properly.
Unlike any other unit type, it makes sense for a timer to start another
timer. It is an easy way to crate logical "and" between time conditions
for instance, every day but no less than 5' after boot can easily be
implemented by a OnBootSec triggering an OnCalendar.
This is particulary usefull with Persistant timers which tend to all fire
together at startup
We already have the terminal open, hence pass the fd we got to
ask_password_tty(), so that it doesn't have to reopen it a second time.
This is mostly an optimization, but it has the nice benefit of making us
independent from RLIMIT_NOFILE issues and so on, as we don't need to
allocate another fd needlessly.
We should rather sleep to much than too little. This otherwise might
result in a busy loop, because we slept too little and then recheck
again coming to the conclusion we need to go to sleep again, and so on.
We should be careful with these types, and if we do convert between
"int" and "ssize_t" we should do so explicitly rather than implicitly.
Otherwise this just looks like a bug.
Let's forget all relevant terminal features we learnt when we make a
console or /dev/null stdin/stdout/stderr.
Also, while we are at it, let's drop the various _unlikely_ and
_likely_ annotiations around the terminal feature caches. In many cases
we call the relevant functions only once in which cases the annotations
are likely to do just harm and no good. After all we can't know if the
specific code will call us just once or many times...
This modernizes acquire_terminal() in a couple of ways:
1. The three boolean arguments are replaced by a flags parameter, that
should be more descriptive in what it does.
2. We now properly handle inotify queue overruns
3. We use _cleanup_ for closing the fds now, to shorten the code quite a
bit.
Behaviour should not be altered by this.
I think if we log the error as being _ignored_, we should also consider
the event as handled and clear it. This was the behaviour prior to
575b300b (PR #7968).
I don't think we particularly wanted to change behaviour and keep retrying.
Sometimes that's useful, other times you cause more problems by filling the
logs.
Plus a nearby typo fix.
This adds a new bus call to service and scope units called
AttachProcesses() that moves arbitrary processes into the cgroup of the
unit. The primary user for this new API is systemd itself: the systemd
--user instance uses this call of the systemd --system instance to
migrate processes if itself gets the request to migrate processes and
the kernel refuses this due to access restrictions.
The primary use-case of this is to make "systemd-run --scope --user …"
invoked from user session scopes work correctly on pure cgroupsv2
environments. There, the kernel refuses to migrate processes between two
unprivileged-owned cgroups unless the requestor as well as the ownership
of the closest parent cgroup all match. This however is not the case
between the session-XYZ.scope unit of a login session and the
user@ABC.service of the systemd --user instance.
The new logic always tries to move the processes on its own, but if
that doesn't work when being the user manager, then the system manager
is asked to do it instead.
The new operation is relatively restrictive: it will only allow to move
the processes like this if the caller is root, or the UID of the target
unit, caller and process all match. Note that this means that
unprivileged users cannot attach processes to scope units, as those do
not have "owning" users (i.e. they have now User= field).
Fixes: #3388
This corrects the control flow: when we reuse the API bus as system bus,
let's definitely invoke bus_init_system() too, so that it is called
regardless how we acquired the bus object.
(Note that this doesn't actually change anything, as we only inherit the
bus like this in system mode, and bus_init_system() doesn't do anything
in system bus, besides writing a log message)
Let's better be safe than sorry, and validate that api_bus is not NULL
before we send messages to it. Of course, strictly speaking this
shouldn't actually be necessary, as the tracker object should not exist
without the bus, but let's be extra sure.
Previously, we'd synchronize bus names immediately when we succeeded
connecting to the bus, potentially even before coldplugging the units.
This was problematic, as synchronizing bus names meant invoking the
per-unit name change handler function which might change the unit's
state — which will result in consistency when done before we coldplug
things.
With this change we instead enqueue a job for the event loop to resync
the names in a later loop iteration, i.e. at a point where we know
coldplugging has finished.
