We already don't allow directly opening block devices attached to the seat.
They are handled by udisks instead. Clarify the code used when restarting
logind.
We're not removing the pushed fd "again"; this is the only place
logind removes it from PID1. (And stopping the fd doesn't always
cause PID1 to remove the fd itself; it depends on the device type).
Suspend to Hibernate is a new sleep method that invokes suspend
for a predefined period of time before automatically waking up
and hibernating the system.
It's similar to HybridSleep however there isn't a performance
impact on every suspend cycle.
It's intended to use with systems that may have a higher power
drain in their supported suspend states to prevent battery and
data loss over an extended suspend cycle.
Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Reproducer:
$ meson build && cd build
$ ninja
$ sudo useradd test
$ sudo su test
$ ./systemd --system --test
...
Failed to create /user.slice/user-1000.slice/session-6.scope/init.scope control group: Permission denied
Failed to allocate manager object: Permission denied
Above error message is caused by the fact that user test didn't have its
own session and we tried to set up init.scope already running as user
test in the directory owned by different user.
Let's skip setting up init.scope altogether since we won't be launching
processes anyway.
We don't need to check if we are adding ourselves to the list
if we know that it's the windows or EFI shell loaders.
If we are adding the EFI default loader, additionally try to
see if we can find the systemd-boot magic string and skip
this entry if we do.
ISO C does not allow empty statements outside of functions, and gcc
will warn the trailing semicolons when compiling with -pedantic:
warning: ISO C does not allow extra ‘;’ outside of a function [-Wpedantic]
But our code cannot compile with -pedantic anyway, at least because
warning: ISO C does not support ‘__PRETTY_FUNCTION__’ predefined identifier [-Wpedantic]
Without -pedatnic, clang and even old gcc (3.4) generate no warnings about
those semicolons, so let's just drop __useless_struct_to_allow_trailing_semicolon__.
This should make it a bit easier to search for real file descriptor leaks.
```
$ valgrind --leak-check=full --track-fds=yes ./build/test-fileio
...
==29457==
==29457== FILE DESCRIPTORS: 4 open at exit.
==29457== Open file descriptor 3: /tmp/test-systemd_writing_tmpfile.lyV5Rc
==29457== at 0x4B9AD9E: open (open.c:43)
==29457== by 0x4B19B24: __gen_tempname (tempname.c:261)
==29457== by 0x4BA5CC3: mkostemp64 (mkostemp64.c:32)
==29457== by 0x48F739B: mkostemp_safe (fileio.c:1206)
==29457== by 0x10D968: test_writing_tmpfile (test-fileio.c:620)
==29457== by 0x10E930: main (test-fileio.c:767)
==29457==
```
This helps get around a bug confusing `glibc` and making the test bail
out with the following error under `asan` on `x86`:
Fatal error: glibc detected an invalid stdio handle
Aborted (core dumped)
The bug has been reported in https://github.com/google/sanitizers/issues/778,
but it is unlikely to be fixed anytime soon.
Otherwise we can be fooled if one path component is replaced underneath us.
The patch achieves that by always operating at file descriptor level (by using
*at() helpers) and by making sure we do not any path resolution when traversing
direcotry trees.
However this is not always possible, for instance when listing the content of a
directory or some operations don't provide the *at() helpers or others (such as
fchmodat()) don't have the AT_EMPTY_PATH flag. In such cases we operate on
/proc/self/fd/%i pseudo-symlink instead, which works the same for all kinds of
objects and requires no checking of type beforehand.
Also O_PATH flag is used when opening file objects in order to prevent
undesired behaviors: device nodes from reacting, automounts from
triggering, etc...
Fixes: #7986
Fixes: CVE-2018-6954
The unit files for test-execute are named like
`exec-(setting-name-in-lower-character)-(optional-text).service`.
However, test units for AmbientCapabilities= are not following this.
So, let's rename them for the consistency.
This does not change anything in the functionality of the test.
$ git grep FDNAME
logind-session-device.c: ... "FDNAME=session-", sd->session->id);
logind-session-device.c: ... "FDNAME=session", sd->session->id);
Oops.
Fixes#8343. Or at least a more minimal reproducer. Xorg still
dies when logind is restarted, but the Xorg message says this
is entirely deliberate.
(This could also be the reason I hit #8035, instead of the race
condition I originally suggested).
This turns resolve-tool into a multi-call binary. When invoked as
"resolvconf" it provides minimal compatibility with the resolvconf(8)
tool of various distributions (and FreeBSD as it appears).
This new interface understands to varying degrees features of the two
major implementations of resolvconf(8): Debian's original one and
"openresolv". Specifically:
Fully supported:
-a -d (supported by all implementations)
-f (introduced by openresolv)
Somewhat supported:
-x (introduced by openresolv, mapped to a '~.' domain entry)
Unsupported and ignored:
-m -p (introduced by openresolv, not really necessary for us)
Unsupported and resulting in failure:
-u (supported by all other implementations)
-I -i -l -R -r -v -V
(all introduced by openresolv)
--enable-updates --disable-updates --updates-are-enabled
(specific to Debian's implementation)
Of course, resolvconf(8) is a tool with multiple backends, in our
implementation systemd-resolved is the only backend.
Fixes: #7202
This PR implements the first part of RFE #8046. I.e. this allows to
write:
```
u username -:300
```
Where the uid is chosen automatically but the gid is fixed.
Lennart Poettering
Alan Jenkins
Yu Watanabe
Mario Limonciello
Zbigniew Jędrzejewski-Szmek
Michal Sekletar
Jan Janssen
Evegeny Vereshchagin
Franck Bui
SjonHortensius
Michael Vogt