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activate: improve SIGCHLD handler
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man: update links to kernel.org cgroup documentation
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tests: don't rely on underlying fs in udev-test, use tmpfs instead
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* Don't lose children exit codes
* Don't receive notification when child processes stop
Eliminates annoying "Child died"-messages:
$ ./systemd-socket-activate -l 2000 --inetd -a cat
^Z
[1]+ Stopped ./systemd-socket-activate -l 2000 --inetd -a cat
$ bg %1
[1]+ ./systemd-socket-activate -l 2000 --inetd -a cat &
Child 15657 died with code 20
$ ps u 15657
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
ubuntu 15657 0.0 0.0 4540 680 pts/2 S 00:34 0:00 cat
* Don't fail to reap some zombie children
Fixes
$ ./systemd-socket-activate -l 2000 --inetd -a cat &
$ for i in {1..1000}; do echo a | nc localhost 2000 & done
$ ps f
...
18235 pts/2 Ss 0:01 -bash
15849 pts/2 S 0:00 \_ ./systemd-socket-activate -l 2000 --inetd
-a cat
16081 pts/2 Z 0:00 | \_ [cat] <defunct>
16381 pts/2 Z 0:00 | \_ [cat] <defunct>
and many more zombies
...
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systemctl: don't start polkit agent when running as root
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Fixes: #457
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On the server side we already bypass the polkit checks if the caller is root
(see the sd_bus_query_sender_privilege() call in bus_verify_polkit_async()). So
there is no reason to invoke polkit when running
systemctl/machinectl/loginctl/timedatectl as root.
Fixes #2748
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sd-device: fix crash if a device has many tags
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This recently moved from /cgroups/ to /cgroup-v1/.
Fixes #2958
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strjoina() is unsafe to be used in an unbounded loop as alloca() has no error
reporting. Thus devices with a large number of tags or devlinks trigger a
segfault in device_properties_prepare() due to overflowing the stack.
Rewrite the building of the "tags" and "devlinks" strings using
GREEDY_REALLOC() and strpcpy() to work with arbitrarily long strings. This also
avoids re-copying the entire string in each loop iteration.
Before this commit we always appended one final ":" to "tags". Change this to
start with an iniital ":" and for each tag append instead of prepend a ":".
This unifies what happens for the first and all subsequent tags so that we can
use a for loop.
Fixes #2954
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*.localdomain != localhost
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".localdomain" is not a reserved suffix (or prefix). I'm not aware of any
product expecting *.localdomain to resolve to localhost, however I am aware of
at least one product that defaults to ".localdomain" as its DNS suffix provided
via DHCP (pfSense). This leads to unexpected results when attempting to access
a host that's offline (or a host that's online, when nsswitch.conf is
[mis-]configured to have myhostname ahead of DNS).
Operate on:
localhost (and localhost.)
*.localhost (and *.localhost.)
localhost.localdomain (and localhost.localdomain.)
*.localhost.localdomain (and *.localhost.localdomain.)
We should not cover:
*.localdomain (nor *.localdomain.)
localdomain (nor localdomain.)
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Offline updates man page
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NEWS: add some more items
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run: add colon before printing started units
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Resolves #2908
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* tests-functions: improve FSTYPE-support
make clean setup FSTYPE=reiserfs is working fine now :)
* basic: fallback to fstatat if entry->d_type is DT_UNKNOWN
Fixes localectl on reiserfs:
-bash-4.3# mkdir -p /usr/lib/locale
-bash-4.3# stat -f /usr/lib/locale/
File: "/usr/lib/locale/"
ID: bdb0322715b5366e Namelen: 255 Type: reiserfs
Block size: 4096
Blocks: Total: 99835 Free: 60262 Available: 60262
Inodes: Total: 0 Free: 0
-bash-4.3# mkdir /usr/lib/locale/HeyHo
-bash-4.3# localectl list-locales --no-pager
-bash-4.3# mount -t tmpfs tmpfs /usr/lib/locale
-bash-4.3# mkdir /usr/lib/locale/HeyHo
-bash-4.3# localectl list-locales --no-pager
HeyHo
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In 110ceee58e5bc796c03a7db2109f85a999d5bc2e we removed the period after
printing the started units. This makes copying the unit name easier but
results in improper English.
This adds a colon before printing the units, which makes the output
look better.
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DUID support is mentioned without details since those are still
being worked out.
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Revert "time-util: fall back to CLOCK_MONOTONIC if CLOCK_BOOTTIME unsupported"
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Most of the changes are already implemented in dnf-system-upgrade.service
and packagekit-offline-update.service, so this update mostly changes the
documentation to match status quo.
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It could be that our .service is being stopped precisely because the
device already disappeared (e.g. due to a manual `cryptsetup close`, or
due to UDisks2 cleaning up).
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dhcp-identifier: handle too large duid_len argument in dhcp_validate_duid_len()
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dont create bind-mount target when it exists
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for bind-mounts when they already exist. This allows
bind-mounting over read-only files.
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Callers of dhcp_validate_duid_len() know that they must not pass
a zero duid_len. Thus asserting against that is appropriate.
On the other hand, they are not aware of the maximum allowed length
of a duid, as that is the reason why they call dhcp_validate_duid_len()
in the first place. So dhcp_validate_duid_len() should just signal a
regular error.
Thereby, change assert_return() to an assert() as this is an internal
function.
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sd-dbus: Fix uint32 property reading
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%u is a simple uint which might not be 32 bit on every platform. Use PRIu32
instead.
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Fix copy&paste bug in map_basic() to use the correct data type for
SD_BUS_TYPE_UINT32. Before we were copying the wrong 32 bits into the
destination pointer, resulting in complete garbage on big-endian systems.
Fixes #2927
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man: Fix documented parameters for udev_device_get_ functions
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core: improve error message when starting template without instance
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lldp: move public macros to sd-lldp.h and namespace them
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core: cgroup2 support
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core: ShutdownWatchdogSec=infinity disables the watchdog logic too
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This is a follow-up for 947292eef
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core: RuntimeWatchdogSec=infinity disables the watchdog logic
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build-sys: fix build with libgrcypt disabled
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shared: fix a misspelling of "journalctl"
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- Move gcrypt.h include inside grcrypt-util.h.
- Allow gcrypt-util.[ch] to be compiled even without gcrypt.
This allows the logic in files using gcrypt to be simplified.
- Fix compilation of systemd-resolve without gcrypt.
systemd-resolved already supported that.
Fixes #2711.
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After receiving SIGCHLD, one of the ways manager_dispatch_sigchld() maps the
now zombie $PID to its unit is through manager_get_unit_by_pid_cgroup() which
reads /proc/$PID/cgroup and looks up the unit associated with the cgroup path.
On non-unified cgroup hierarchies, a process is immediately migrated to the
root cgroup on death and the cgroup lookup would always have returned the unit
associated with it, making it rather pointless but safe. On unified hierarchy,
a zombie remains associated with the cgroup that it was associated with at the
time of death and thus manager_get_unit_by_pid_cgroup() will look up the unit
properly.
However, by the time manager_dispatch_sigchld() is running, the original cgroup
may have become empty and it and its associated unit might already have been
removed. If the cgroup path doesn't yield a match, manager_dispatch_sigchld()
keeps pruning the leaf component. This means that the function may return a
slice unit for a pid and as a slice doesn't have ->sigchld_event() handler,
calling invoke_sigchld_event() on it causes a segfault.
This patch updates invoke_sigchld_event() so that it skips calling if the
handler is not set.
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Earlier during the development of unified hierarchy, the populated event was
reported through by the dedicated "cgroup.populated" file; however, the
interface was updated so that it's reported through the "populated" field of
"cgroup.events" file. Update populated event handling logic accordingly.
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Since Linux v4.4-rc1, __DEVEL__sane_behavior does not exist anymore and
is replaced by a new fstype "cgroup2".
With this patch, systemd no longer supports the old (unstable) way of
doing unified hierarchy with __DEVEL__sane_behavior and systemd now
requires Linux v4.4 for unified hierarchy.
Non-unified hierarchy is still the default and is unchanged by this
patch.
https://github.com/torvalds/linux/commit/67e9c74b8a873408c27ac9a8e4c1d1c8d72c93ff
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