man: try to explain different actions in tmpfiles a bit better
- do not suggest that vendor configuration files should be in
/etc, use /usr/lib/tmpfiles.d instead
- split the first example, because the text talked about "needing
two directories", but then a smack attribute was also set, and
on a different path, which looked like a typo. Replace that
with the example from original patch [1] which added 't'.
- fix the example for /var/tmp/abrt. The 'x' line was redundant,
because /var/tmp/abrt/* is already filtered because "d /var/tmp/abrt"
overrides "d /var/tmp".
This changes the behaviour of pid1 in the following ways:
- obviously $TERM is now checked,
- $SYSTEMD_COLORS is now honoured too, before only SYSTEMD_LOG_COLORS was checked,
- isatty() is run on stdout not stderr.
basic/terminal-util: cache value for colors_enabled
After all it's something that we query over and over.
For example, systemctl calls colors_enabled() four times for each failing
service. The compiler is unable to optimize those calls away because they
(potentially) accesses external and global state through on_tty() and
getenv().
coredump: create unnamed temporary files if possible (O_TMPFILE) (#3065)
Don't leave temporary files if the coredump service is aborted during
the operation
Yeah, these are temporary files that systemd-coredump needs while
processing the coredumps. Of course, if the coredump service is aborted
during the operation we better shouldn't leave those files around. This
is hence a bug to fix in our coredumping code.
See https://github.com/systemd/systemd/issues/2804#issuecomment-210578147
Another option is to simply use O_TMPFILE, and when it is not available
fall back to the current behaviour. After all, the files are cleaned up
eventually, through normal tmpfiles aging, and the offending file
systems are pretty exotic these days, or not in the upstream kernel.
See https://github.com/systemd/systemd/issues/2804#issuecomment-211496707
shared/install: change value of _UNIT_FILE_CHANGE_TYPE_INVALID
-1 could be confused with -EPERM. But we still need a negative enum
value to force gcc to use int for the enum type, even though it is
unused. Otherwise we get warnings.
shared/install,systemctl,core: report offending file on installation error
Fixes #2191:
$ systemctl --root=/ enable sddm
Created symlink /etc/systemd/system/display-manager.service, pointing to /usr/lib/systemd/system/sddm.service.
$ sudo build/systemctl --root=/ enable gdm
Failed to enable unit, file /etc/systemd/system/display-manager.service already exists and is a symlink to /usr/lib/systemd/system/sddm.service.
$ sudo build/systemctl --root= enable sddm
$ sudo build/systemctl --root= enable gdm
Failed to enable unit: File /etc/systemd/system/display-manager.service already exists and is a symlink to /usr/lib/systemd/system/sddm.service.
(I tried a few different approaches to pass the error information back to the
caller. Adding a new parameter to hold the error results in a gigantic patch
and a lot of hassle to pass the args arounds. Adding this information to the
changes array is straightforward and can be more easily extended in the
future.)
In case local installation is performed, the full set of errors can be reported
and we do that. When running over dbus, only the first error is reported.
sleep: Add debug feature to bypass hibernation memory checks. (#3064)
This new feature bypasses checking if a swap partition is mounted
or if there is enough swap space available for hibernation to
succeed.
This can be useful when a system with a Solid State Disk (SSD)
has no normal swap partition or file configured, and a custom
systemd unit is used to mount a swap file just before hibernating
and unmount it just after resuming.
Currently, 99-systemd.rules.in contains a line for network block
devices, which mark them as inactive until the first change event, and
as active from then on forward. This is not correct. A network block
device can be connected or disconnected; this state is signalled by the
presence or absense of a "pid" file, which contains the PID of the
nbd client userspace process that started the connection.
Update the rules file so that it checks for the presence of that file to
decide what to set SYSTEMD_READY to.
Note that current kernels do issue a change event upon connecting the
device, but not yet upon disconnecting. While it's possible to wait
until that's been fixed, the behaviour of the rule with TEST!="pid" in
the absence of a proper uevent is exactly the same as the behaviour of
the old rule; so it should be safe to apply now.
basic: user-utils.c needs missing.h for secure_getenv (#3059)
Otherwise building may fail with:
src/basic/user-util.c: In function 'get_home_dir':
src/basic/user-util.c:343:9: error: implicit declaration of function 'secure_getenv' [-Werror=implicit-function-declaration]
Dan Nicholson [Mon, 18 Apr 2016 02:52:45 +0000 (19:52 -0700)]
conf-parser: Set EXTRACT_RETAIN_ESCAPE when extracting words (#2917)
If you reference another unit with an escaped name, the escaped characters
should remain in the extracted word. This used to work correctly prior to
commit 34f253f0.
The problem can be seen when units with escaped names are referenced.
$ systemctl enable "dev-disk-by\x2dlabel-eos\x2dswap.swap"
Created symlink
/etc/systemd/system/dev-disk-byx2dlabel-eosx2dswap.device.wants/dev-disk-by\x2dlabel-eos\x2dswap.swap,
pointing to /usr/lib/systemd/system/dev-disk-by\x2dlabel-eos\x2dswap.swap.
The wants directory should be created with the x2ds escaped with \.
tree-wide: use ERFKILL instead of ESHUTDOWN for "unit masked"
If the error code ever leaks (we print the strerror error instead of providing
our own), the message for ESHUTDOWN is "Cannot send after transport endpoint
shutdown", which can be misleading. In particular it suggest that some
mishandling of the dbus connection occured. Let's change that to ERFKILL which
has the advantage that a) it sounds implausible as actual error, b) has the
connotation of disabling something manually.
Before 0f03c2a4c093 specifying any path would cause the systemctl client
to do the installation itself, instead of going over dbus. Restore that
behaviour.
Also rename l to paths, to make the code easier to read,
and do strv deduplication immediately when extending. No need to allocate
strings to remove them a few lines down.
tests: don't rely on the host's systemd-nspawn, don't register test machine (#3023)
Fixes:
$ cd test/TEST-07-ISSUE-1981/
$ sudo make clean setup run
...
timeout: failed to run command ‘systemd-nspawn’: No such file or directory
...
TEST RUN: https://github.com/systemd/systemd/issues/1981 [FAILED]
Makefile:10: recipe for target 'run' failed
make: *** [run] Error 1
Ismo Puustinen [Wed, 13 Apr 2016 12:38:03 +0000 (15:38 +0300)]
sd-bus: query pid also when searching for supplementary gids
If the SD_BUS_CREDS_SUPPLEMENTARY_GIDS value is requested, the pid is
queried to find out the supplementary gids value from /proc/pid/status.
Otherwise sd_bus_creds_get_supplementary_gids() won't work unless some
other value in mask triggered fetching the pid information.
Let's make this more digestable to read by making the list of documented unit
file paths a bit shorter.
Specifically, let's drop references to $XDG_CONFIG_HOME and $XDG_DATA_HOME, as
their default values are listed too already. Given that the fact that the XDG
basedir spec makes these paths configurable is probably not a strong point of
the spec, let's drop the reference to the env vars, and keep only the literal,
default paths for them in the list. Of course, we do support the full XDG
basedir spec in this regard, but it's one thing to implement it and another one
to recommend it by documenting it.
tests: override XDG_RUNTIME_DIR where we use the user runtime dir
We don#t really support systems where XDG_RUNTIME_DIR is not supported for
systemd --user. Hence, let's always set our own XDG_RUNTIME_DIR for tests that
involve systemd --user, so that we know it is set, and that it doesn't polute
the user's actual runtime dir.
There's no point in first determining the drop-in file name path, then
forgetting it again, and then determining it again. Instead, just generated it
once, and then write to ti directly.
core,systemctl: add new "systemctl revert" command
This allows dropping all user configuration and reverting back to the vendor
default of a unit file. It basically undoes what "systemctl edit", "systemctl
set-property" and "systemctl mask" do.
sysv-generator: port to use new unit_file_exists() call
The code previously queries the state of a unit file, but was only interested
in the existance of it, hence let's use unit_file_exists() instead, the same
way the SysV compat code in systemctl does it.
systemctl: don't confuse sysv code with generated units
The SysV compat code checks whether there's a native unit file before looking
for a SysV init script. Since the newest rework generated units will show up in
the unit path, and hence the checks ended up assuming that there always was a
native unit file for each init script: the generated one.
With this change the generated unit file directory is suppressed from the
search path when this check is done, to avoid the confusion.
path-lookup: move generator_binary_paths() to end of file
Let's keep the code that manipulates LookupPaths together, and move
generator_binary_paths() to the end of the .h and .c files, since it is not
strictly related to that.
systemctl: move check whether a service exists as native unit file to install.c
Move the search path check from the SysV service compat support into install.c
so that we can reuse the usual algorithm instead of rolling a private loop for
this.
Always warn if something fails, and clarify that the involved utility functions
do so in their name.
Drop the REBOOT_PARAM_FILE macro. We don't do this for other flag file paths
like this, so don't do this for this one either. The path isn't configurable
anyway, hence let's make this easier to read by avoiding this one indirection.
core: rework how transient unit files and property drop-ins work
With this change the logic for placing transient unit files and drop-ins
generated via "systemctl set-property" is reworked.
The latter are now placed in the newly introduced "control" unit file
directory. The fomer are now placed in the "transient" unit file directory.
Note that the properties originally set when a transient unit was created will
be written to and stay in the transient unit file directory, while later
changes are done via drop-ins.
This is preparation for a later "systemctl revert" addition, where existing
drop-ins are flushed out, but the original transient definition is restored.
This patch adds a concept of a "control" unit file directory, which is supposed
to be used as place for unit file drop-ins created by "systemctl set-property"
(note that this directory is not actually hooked up to "systemctl set-property"
yet, that's coming in a later patch).
The rationale for this: previously changes made by the user and by "systemctl
set-property" were done in the same directory, which made semantics very
unclear: the changes made by "systemctl set-property" were applied instantly,
and their drop-ins only written to not lose settings on a later "systemctl
daemon-reload", while drop-ins made by the user would only be in effect after
"systemctl daemon-reload". This is particular problematic as the changes made
by "systemctl set-property" would really apply immediately without any respect
for the unit search path. This meant that using "set-property" could have an
effect that is lsot as soon as "daemon-reload" is issued, in case there was a
"later" drop-in already in place.
With this change the directories are seperated, and the "control" directory
always takes the highest priority of all, to avoid any confusion.
This is too confusing, as this funciton returns the paths to the generator
binaries, while usually when we refer to the just the "generator path" we mean
the generated unit files. Let's clean this up.
localed: downgrade libxkbcommon to an optional runtime dependency
Previously, libxkbcommon was a compile-time option. When enabled the localed
binary would strictly depend on it, thus pulling in libxkbcommon and its
dependencies, which are non-trivial in size.
With this change we dlopen() libxkbcommon when it is available instead. If the
library is available behaviour is as before. However, if it isn't the system is
considered "headless", i.e. without local hardware and all attempts to set the
local keyboard configuration will be refused.
This is useful for general-purpose distributions which want to support
"headless" (such as container systems) and "full" systems with the same build.
install: introduce a new unit file state "transient"
Now, that the search path logic knows the unit path for transient units we also
can introduce an explicit unit file state "transient" that clarifies to the
user what kind of unit file he is encountering.
Previously, we'd execute some operations with the root prefix applied, while
others without (which was a bug). Clean this up: all paths are now prefixed
properly with the root path, and we strip it off when necessary.
(Of course, an alternative option would be to strictly pass around paths
without the prefix prepended and only prepend it right before hitting the disk,
however, I am came to the conclusion this would result in more code.)
path-lookup: clean up user_config_home() and user_runtime_dir()
Let's modernize these calls a bit.
Also, don't call them from user_dirs() anymore, as we already have both dirs in
the list a second time via the persistent_config and runtime_config function
parameters.
core: don't reorder drop-ins when changing properties
The drop-in order we present should actually show what we is in effect, hence
let's not reorder it when writing changes. After all, just sorting
alphabetically is going to break things, as it doesn't respect that /etc breaks
/run breaks /usr...
core: don't drop transient drop-ins when loading the rest
Previously, when creating a transient unit, we'd first add the transient
drop-ins to the unit, and then normally load any other drop-ins later on top of
this, replacing the already loaded drop-ins. Let's not do this, after all the
transient drop-ins area already in effect, let's just add what we find on disk,
but not replace it.
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