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Presently, CLI utilities such as systemctl will check whether they have a tty
attached or not to decide whether to parse /proc/cmdline or EFI variable
SystemdOptions looking for systemd.log_* entries.
But this check will be misleading if these tools are being launched by a
daemon, such as a monitoring daemon or automation service that runs in
background.
Make log handling of CLI tools uniform by never checking /proc/cmdline or EFI
variables to determine the logging level.
Furthermore, introduce a new log_setup_cli() shortcut to set up common options
used by most command-line utilities.
Also use double space before the tracking args at the end. Without
the comma this looks ugly, but it's a bit better with the double space.
At least it doesn't look like a variable with a type.
I'm not sure if I understand the code correctly, but it seems that if
storig in the second set failed, we'd return with the first set having
no reference on the link object, and the link object could be freed in the
future, leaving the set with a dangling reference.
On error, we'd just free the object, and not close the fd.
While at it, let's use set_ensure_consume() to make sure we don't leak
the object if it was already in the set. I'm not sure if that condition
can be achieved.
_cleanup_set_free_ is enough for unit_files, because unit_files is
allocated in set_put_strdup(), which uses string_hash_ops_free.
This fixes a leak if marker was already present in the table.
This combines set_ensure_allocated() with set_consume(). The cool thing is that
because we know the hash ops, we can correctly free the item if appropriate.
Similarly to set_consume(), the goal is to simplify handling of the case where
the item needs to be freed on error and if already present in the set.
* Drop mac_selinux_use() condition from mac_selinux_free(): if the
passed pointer holds memory we want to free it even if SELinux is
disabled
* Drop NULL-check cause man:freecon(3) states that freecon(NULL) is a
well-defined NOP
* Assert that on non-SELinux builds the passed pointer is always NULL,
to avoid memory leaks
The f'...' format was introduced in Python 3.6 ( https://www.python.org/dev/peps/pep-0498/ )
and returns an error when systemd is built on a system with an older Python3 version:
<...>
File /home/bluca/git/systemd/tools/make-autosuspend-rules.py, line 15
print(f'pci:v{vendor:08X}d{device:08X}*')
^
SyntaxError: invalid syntax
[2/388] Generating version.h with a custom command.
ninja: build stopped: subcommand failed.
$ python3 --version
Python 3.5.6
Use an older format to keep backward compatibility.
Previously we'd used the existance of a specific AF_UNIX socket in the
abstract namespace as lock for disabling lookup recursions. (for
breaking out of the loop: userdb synthesized from nss → nss synthesized
from userdb → userdb synthesized from nss → …)
I did it like that because it promised to work the same both in static
and in dynmically linked environments and is accessible easily from any
programming language.
However, it has a weakness regarding reuse attacks: the socket is
securely hashed (siphash) from the thread ID in combination with the
AT_RANDOM secret. Thus it should not be guessable from an attacker in
advance. That's only true if a thread takes the lock only once and
keeps it forever. However, if a thread takes and releases it multiple
times an attacker might monitor that and quickly take the lock
after the first iteration for follow-up iterations.
It's not a big issue given that userdb (as the primary user for this)
never released the lock and we never made the concept a public
interface, and it was only included in one release so far, but it's
something that deserves fixing. (moreover it's a local DoS only, only
permitting to disable native userdb lookups)
With this rework the libnss_systemd.so.2 module will now export two
additional symbols. These symbols are not used by glibc, but can be used
by arbitrary programs: one can be used to disable nss-systemd, the other
to check if it is currently disabled.
The lock is per-thread. It's slightly less pretty, since it requires
people to manually link against C code via dlopen()/dlsym(), but it
should work safely without the aforementioned weakness.
This just adds a _cleanup_ helper call encapsulating dlclose().
This also means libsystemd-shared is linked against libdl now. I don't
think this is much of an issue, since libdl is part of glibc anyway, and
anything from exotic. It's not an optional part of the OS (think: NSS
requires dynamic linking), hence this pulls in no deps and is almost
certainly loaded into all process' memory anyway.
[zj: use DEFINE_TRIVIAL_CLEANUP_FUNC().]
This reverts commit 53aa85af24.
The reason is that that patch changes the dbus api to be different than
the types declared by introspection api.
Replaces #16122.
This reverts commit 097537f07a.
At least Fedora and Debian have already reverted this at the distro
level because it causes more problems than it solves. Arch is debating
reverting it as well [0] but would strongly prefer that this happens
upstream first. Fixes#15188.
[0] https://bugs.archlinux.org/task/66458
If an autostart file for GNOME has a phase specified, then this implies
it is a session service that needs to be started at a specific time.
We have no way of handling the ordering, and while it does make sense
to explicitly hide these services with X-systemd-skip, there is no point
in even trying to handle them.
Since #15533 we didn't create the mount point for selinuxfs anymore.
Before it we created it twice because we mount selinuxfs twice: once the
superblock, and once we remount its bind mound read-only. The second
mkdir would mean we'd chown() the host version of selinuxfs (since
there's only one selinuxfs superblock kernel-wide).
The right time to create mount point point is once: before we mount the
selinuxfs. But not a second time for the remount.
Fixes: #16032
This also adds a <citerefentry project="url"> type,
since the other btrfs manpages use man-pages/die-net and are alive,
and btrfs.w.k.o won't be used anywhere else
