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udevd already limits its number of workers/children: the max number is actually
twice the number of CPUs the system is using.
(The limit can also be raised with udev.children-max= kernel command line
option BTW).
On some servers, this limit can easily exceed the maximum number of tasks that
systemd put on all services, which is 512 by default.
Since udevd has already its limitation logic, simply disable the static
limitation done by TasksMax.
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root=/dev/nfs is a legacy option for the kernel to handle root on NFS.
Documentation for this kernel command line option
can be found in the kernel source tree:
Documentation/filesystems/nfs/nfsroot.txt
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add new RestrictRealtime= option to services (and other fixes)
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systemctl: Add missing "/" to files created by 'edit --runtime'
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It makes use of the sd_listen_fds() call, and as such should live in
src/shared, as the distinction between src/basic and src/shared is that the
latter may use libsystemd APIs, the former does not.
Note that btrfs-util.[ch] and log.[ch] also include header files from
libsystemd, but they only need definitions, they do not invoke any function
from it. Hence they may stay in src/basic.
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It takes a boolean value. If true, access to SCHED_RR, SCHED_FIFO and
SCHED_DEADLINE is blocked, which my be used to lock up the system.
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Let's politely refuse with EPERM rather than kill the whole thing right-away.
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This was forgotten when MemoryDenyWriteExecute= was added: we should set NNP in
all cases when we set seccomp filters.
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It's a function defined by us, hence we should look for the error in its return
value, not in "errno".
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This is a fix-up for 2a9a6f8ac04a69ca36d645f9305a33645f22a22b which covered
non-transient units, but missed the case for transient units.
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This change documents the existance of the systemd-nspawn@.service template
unit file, which was previously not mentioned at all. Since the unit file uses
slightly different default than nspawn invoked from the command line, these
defaults are now explicitly documented too.
A couple of further additions and changes are made, too.
Replaces: #3497
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Otherwise starting a machine named `foo-bar-baz` will end up in
machinectl attempting to start the service unit
`systemd-nspawn@foo\x2dbar\x2dbaz` instead of
`systemd-nspawn@foo-bar-baz`.
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Add sd_notify() parameter to change watchdog_usec during runtime.
Application can change watchdog_usec value by
sd_notify like this. Example. sd_notify(0, "WATCHDOG_USEC=20000000").
To reset watchdog_usec as configured value in service file,
restart service.
Notice.
sd_event is not currently supported. If application uses
sd_event_set_watchdog, or sd_watchdog_enabled, do not use
"WATCHDOG_USEC" option through sd_notify.
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This documents the "add nosuid and nodev options to tmp.mount" change from
commit 2f9df7c96a2.
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Fix console log color
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This makes privilege escalation attacks harder by putting traps and exploits
into /tmp.
https://bugs.debian.org/826377
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Also we had to connect PID's stdio to null later since colors_enabled()
assume that stdout is connected to the console.
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When systemd is started by the kernel, the kernel set the TERM
environment variable unconditionnally to "linux" no matter the console
device used. This might be an issue for dumb devices with no colors
support.
This patch uses default_term_for_tty() for getting a more accurate
value. But it makes sure to keep the user preferences (if any) which
might be passed via the kernel command line. For that purpose /proc
should be mounted.
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* sd_bus_add_match
* sd_bus_get_fd
* sd_bus_message_read_basic
* sd_bus_process
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Do not ellipsize cgroups when showing slices in --full mode
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Quoting @cgwalters:
Just uploading this as an RFC. Now I know reading the code that systemd says
`Welcome to $OS` as a generic thing, but my initial impression on seeing this
was that it was almost sarcastic =)
Let's say "You are in emergency mode" as a more neutral/less excited phrase.
This patch is based on #3556, but makes the same change for rescue mode.
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Jun 16 05:12:08 systemd[1]: Controller 'io' supported: yes
Jun 16 05:12:08 systemd[1]: Controller 'memory' supported: yes
Jun 16 05:12:08 systemd[1]: Controller 'pids' supported: yes
instead of
Jun 16 04:06:50 systemd[1]: Controller 'memory' supported: yes
Jun 16 04:06:50 systemd[1]: Controller 'devices' supported: yes
Jun 16 04:06:50 systemd[1]: Controller 'pids' supported: yes
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This reverts commit ce8aba568156f2b9d0d3b023e960cda3d9d7db81.
We should pass an environment as close as possible to what we originally
got.
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When re-executed, reconnect the console to PID1's stdios as it was the case
when PID1 was initially started by the kernel.
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tests: fix memory leak, don't run test_get_process_cmdline_harder under valgrind
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See https://github.com/systemd/systemd/pull/3555#issuecomment-226564908
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In makefile we create symlinks runlevel5.target to graphical.target and
runlevel2-4.target to multi-user.target. Let's say the same thing in
systemd.special manpage.
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Fixes:
==27917== 3 bytes in 1 blocks are definitely lost in loss record 1 of 1
==27917== at 0x4C28BF6: malloc (vg_replace_malloc.c:299)
==27917== by 0x55083D9: strdup (in /usr/lib64/libc-2.22.so)
==27917== by 0x1140DA: find_converted_keymap (keymap-util.c:524)
==27917== by 0x110844: test_find_converted_keymap (test-keymap-util.c:52)
==27917== by 0x1124FE: main (test-keymap-util.c:213)
==27917==
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Delete the dbus1 generator and some critical wiring. This prevents
kdbus from being loaded or detected. As such, it will never be used,
even if the user still has a useful kdbus module loaded on their system.
Sort of fixes #3480. Not really, but it's better than the current state.
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Hwdb updates
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Likely bad measurement and all other websites refer to it being 1000dpi.
See https://bugs.freedesktop.org/show_bug.cgi?id=96225#c13
This reverts commit e7b90ddc345d1817ca48bfcc4e3e73836c8051af.
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From https://bugs.freedesktop.org/show_bug.cgi?id=95417
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See:
https://github.com/systemd/systemd/pull/3529#issuecomment-226421007
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Systemctl fixes
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(#3553)
dns_transaction_maybe_restart() is supposed to return 1 if the the transaction
has been restarted and 0 otherwise. dns_transaction_process_dnssec() relies on
this behaviour. Before this change in case of restart we'd call
dns_transaction_go() when restarting the lookup, returning its return value
unmodified. This is wrong however, as that function returns 1 if the
transaction is pending, and 0 if it completed immediately, which is a very
different set of return values. Fix this, by always returning 1 on redirection.
The wrong return value resulted in all kinds of bad memory accesses as we might
continue processing a transaction that was redirected and completed immediately
(and thus freed).
This patch also adds comments to the two functions to clarify the return values
for the future.
Most likely fixes: #2942 #3475 #3484
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In https://github.com/systemd/systemd/issues/3543, we would open the pager
before starting ssh, and the pipe fd was "leaked" into the ssh child as the
stderr fd. Previous commit fixes bus-socket to nullify stderr before launching
the child, but it seems reasonable to also delay starting the pager.
If we are going to croak when trying to open the transport, it seems better
to do this before starting the pager.
This commit would also fix #3543 on its own.
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the pager (#3550)
If "systemctl -H" is used, let's make sure we first terminate the bus
connection, and only then close the pager. If done in this order ssh will get
an EOF on stdin (as we speak D-Bus through ssh's stdin/stdout), and then
terminate. This makes sure the standard error we were invoked on is released by
ssh, and only that makes sure we don't deadlock on the pager which waits for
all clients closing its input pipe.
(Similar fixes for the various other xyzctl tools that support both pagers and
-H)
Fixes: #3543
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networkd: add support for vrf interfaces (#3316)
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various changes, most importantly regarding memory metrics
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Permit services to detect whether their stdout/stderr is connected to the journal.
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If for whatever reason the file system is "corrupted", we want
to be resilient and ignore the error, as long as we can load the units
from a different place.
Arch bug https://bugs.archlinux.org/task/49547.
A user had an ntfs symlink (essentially a file) instead of a directory after
restoring from backup. We should just ignore that like we would treat a missing
directory, for general resiliency.
We should treat permission errors similarly. For example an unreadable
/usr/local/lib directory would prevent (user) instances of systemd from
loading any units. It seems better to continue.
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executed services
This permits services to detect whether their stdout/stderr is connected to the
journal, and if so talk to the journal directly, thus permitting carrying of
metadata.
As requested by the gtk folks: #2473
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When running systemctl from git on systemd from systemd-229-8.fc24.x86_64,
ListUnitsByPatterns results in org.freedesktop.DBus.Error.AccessDenied.
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Second attempt had no effect anyway.
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