This adds a new --background= switch that allows specifiying a
background color for the terminal while the tool runs.
It also teaches the tool when invoked as uid0 to tint the terminal in a
reddish hue when operating as root, and in a yellowish hue when
operating as any other user.
This should highlight nicely when the user is operating with elevated
privileges, or changed privileges.
This turns "systemd-run" into a multi-call binary. When invoked under
the name "uid0", then it behaves a bit more like traditional "sudo".
This mostly means defaults appropriuate for that, for example a PAM
stack, interactivity and more.
Fixes: #29199
arg_description was either set to arg_unit (i.e. a const char*), or to
char *description, the result of allocation in run(). But description
was decorated with _cleanup_, so it would be freed when going out of the
function. Nothing bad would happen, because the program would exit after
exiting from run(), but this is just all too messy.
Also, strv_join(" ") + shell_escape() is not a good way to escape command
lines. In particular, one the join has happened, we cannot distinguish
empty arguments, or arguments with whitespace, etc. We have a helper
function to do the escaping properly, so let's use that.
Fixup for 2c29813da3.
The command arguments may contain spurious characters, e.g. line-break.
When we use command arguments as a description of a unit, we should
escape them.
Fixes#30187.
Before this we'd fail with a complaint that PIDFDs is not supported by
the service manager. Add some compat support by falling back to classic
numeric PIDs in that case.
The intention was to have this option enabled by default everywhere,
but unfortunately at least one case was found where it breaks
compatibility of a program using systemd-run --scopes and expecting
variables not to be expanded:
https://sources.debian.org/src/pbuilder/0.231/pbuilder-checkparams/#L400
Example run:
systemd-run --quiet --scope --description=pbuilder_build_xfce4-notes-plugin_1.10.0-1.dsc '--slice=system-pbuilder-build-xfce4\x2dnotes\x2dplugin_1.10.0\x2d1-449932.slice' chroot /var/cache/pbuilder/build/449932 dpkg-query -W '--showformat=${Version}' apt
Restore backward compatibility and make the option disabled by default
when --scope is used, and enabled by default for other types.
In case --expand-environment is not specified and a '$' character is
detected, print a warning to nudge users toward specifying the
parameter as needed. In the future we can then flip the default.
Follow-up for 2ed7a221fa
When resolving environment variables we currently silently resolve unset
and invalid environment variables to empty strings. Let's do this
slightly less silently: log about unset and invalid env vars, but still
resolve them to an empty string.
Fixes: #27036
This makes syntax be the same for commands which are started by the manager and
those which are spawned directly (when --scope is used).
Before:
$ systemd-run -q -t echo '$TERM'
xterm-256color
$ systemd-run -q --scope echo '$TERM'
$TERM
Now:
$ systemd-run -q --scope echo '$TERM'
xterm-256color
Previous behaviour can be restored via --expand-environment=no:
$ systemd-run -q --scope --expand-environment=no echo '$TERM'
$TERM
Fixes#22948.
At some level, this is a compat break. Fortunately --scope is not very widely
used, so I think we can get away with this. Having different syntax depending
on whether --scope was used or not was bad UX.
A NEWS entry will be required.
This uses StartExecEx to get the equivalent of ExecStart=:. StartExecEx was
added in b3d593673c, so this will not work with
older systemds.
A hint is emitted if we get an error indicating lack of support. PID1 returns
SD_BUS_ERROR_PROPERTY_READ_ONLY, but I'm checking for
SD_BUS_ERROR_UNKNOWN_PROPERTY too for safety.
Just refactoring, in preparation for future changes.
(Though I think it'd be reasonable to do anyway, those functions were
awfully long.)
'git diff' displays this badly. The middle part of start_transient_service()
is moved to make_transient_service_unit(), and the middle part of
start_transient_trigger() is moved to make_transient_trigger_unit().
start_transient_service() would return two ints: one normally and one via
*retval. We can just return one int and propagate it directly, because we
use DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE().
Otherwise, if getopt() and friends are used before parse_argv(), then
the GNU extensions may be ignored.
This should not change any behavior at least now, as we usually use
getopt_long() only once per invocation. But in the next commit,
getopt_long() will be used for other arrays, hence this change will
become necessary.
In various tools and services we have a per-system and per-user concept.
So far we sometimes used a boolean indicating whether we are in system
mode, or a reversed boolean indicating whether we are in user mode, or
the LookupScope enum used by the lookup path logic.
Let's address that, in introduce a common enum for this, we can use all
across the board.
This is mostly just search/replace, no actual code changes.
systemd-run's man page says the following about the working directory of
the process:
"If a command is run as transient scope unit, it will be executed
by systemd-run itself as parent process and will thus inherit the
execution environment of the caller."
This means working directory assignment does not work, as evidenced by
the following invocation:
```bash
$ systemd-run --scope --property=WorkingDirectory=/tmp/ bash -c 'echo $(pwd)'
Unknown assignment: WorkingDirectory=/tmp/
```
However, using the shorthand switch --working-directory silently ignores
this instead of giving a similar error.
```bash
systemd-run --scope --user --working-directory=/tmp/ bash -c 'echo $(pwd)'
Running scope as unit: run-r19cc32e744e64285814dbf2204637a2b.scope
/home/test/projects/systemd
```
This commit fixes this by explicitly generating an error instead of
silently ignoring the switch:
```bash
$ systemd-run --scope --working-directory=/tmp/ bash -c 'echo $(pwd)'
--working-directory is not supported in --scope mode.
```
Same idea as 03677889f0.
No functional change intended. The type of the iterator is generally changed to
be 'const char*' instead of 'char*'. Despite the type commonly used, modifying
the string was not allowed.
I adjusted the naming of some short variables for clarity and reduced the scope
of some variable declarations in code that was being touched anyway.
Before:
$ systemd-run --service-type=notify --user false
Job for run-rc3fe52ee6ddd4a6eaaf1a20e0a949cdf.service failed because the control process exited with error code.
See "systemctl status run-rc3fe52ee6ddd4a6eaaf1a20e0a949cdf.service" and "journalctl -xeu run-rc3fe52ee6ddd4a6eaaf1a20e0a949cdf.service" for details.
After:
$ systemd-run --service-type=notify --user false
Job for run-r7791e380a7b6400ea01d6a0e5a458b23.service failed because the control process exited with error code.
See "systemctl --user status run-r7791e380a7b6400ea01d6a0e5a458b23.service" and "journalctl --user -xeu run-r7791e380a7b6400ea01d6a0e5a458b23.service" for details.
Fixes https://github.com/systemd/systemd/issues/21933
(Or when -H is used, since -H and -M are incompatible.)
Note that the slightly unusual form with separate boolean variables (hint_vars,
hint_addr) instead of e.g. a const char* variable to hold the message, because this
way we don't trigger the warning about non-literal format.
Currently there does not exist a way to specify a path relative to which
all binaries executed by Exec should be found. The only way is to
specify the absolute path.
This change implements the functionality to specify a path relative to which
binaries executed by Exec*= can be found.
Closes#6308
When we are in --user mode there's no point in doing PolicyKit/ask-pw
because both of these systems are only used by system-level services.
Let's disable the two agents for that automaticlly hence.
Prompted by: #20576
In general we almost never hit those asserts in production code, so users see
them very rarely, if ever. But either way, we just need something that users
can pass to the developers.
We have quite a few of those asserts, and some have fairly nice messages, but
many are like "WTF?" or "???" or "unexpected something". The error that is
printed includes the file location, and function name. In almost all functions
there's at most one assert, so the function name alone is enough to identify
the failure for a developer. So we don't get much extra from the message, and
we might just as well drop them.
Dropping them makes our code a tiny bit smaller, and most importantly, improves
development experience by making it easy to insert such an assert in the code
without thinking how to phrase the argument.
Antonio Alvarez Feijoo
Lennart Poettering
Yu Watanabe
Matteo Croce
Zbigniew Jędrzejewski-Szmek
Florian Schmaus
Luca Boccassi
Arthur Shau
Joost Heitbrink
David Tardon
Jan Janssen
Anita Zhang
Luca Boccassi
alexlzhu