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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.
The nobody user/group may not synthesized by systemd.
To run tests the functionalities in such situation, this adds tests
by user/group by daemon, as it is expected to exists all environments.
A runaway string should still be returned by the code that splits on
commas, so add a '?' to the regex so that the last '"?' in a string
still produces a valid block for the split code.
Tested:
ACTION=="remove\"GOTO=""
Which then produced:
$ test/rule-syntax-check.py src/login/70-uaccess.rules
# looking at src/login/70-uaccess.rules
Invalid line src/login/70-uaccess.rules:10: ACTION=="remove\"GOTO=""
clause: ACTION=="remove\"GOTO=""
Using a regex to match the groups is smarter than the split(',') that
would break in those cases.
Tested:
SUBSYSTEM=="usb", ENV{ID_USB_INTERFACES}=="*:060101:*,*:070202:*", TAG+="uaccess"
Rule checker doesn't break there after this commit.
Add support to backslash-escaped double quote inside a string.
Tested by modifying src/login/70-uaccess.rules to include:
ACTION=="remove" it", GOTO="uaccess_end"
And had the rule checker complain about it:
$ test/rule-syntax-check.py src/login/70-uaccess.rules
# looking at src/login/70-uaccess.rules
Invalid line src/login/70-uaccess.rules:10: ACTION=="remove" it", GOTO="uaccess_end"
clause: ACTION=="remove" it"
This is true since commit 7e760b79ad.
Note that the changes in the regex expressions relies on the fact that the
script assumes that the comma separator is mandatory.
Add a comment in the script to clarify this.
In udev man page, "PROGRAM" key is part of the keys which are used for
matching purposes so it should only be used with the compare operator "==".
Actually it doesn't really make sense to assign it a value.
udev code allows both "=" and "==" for PROGRAM and both are handled the same
way but for consistencies it's better to have only the compare operator allowed
by the rule syntax checker.
No rules shipped by systemd use PROGRAM key so nothing need to be changed in
our rule files.
`nobody` is a special user, whose credentials should be extracted with
`get_user_creds`. `getpwnam` called in `test-udev.pl` is a bit different,
which causes the test to fail with the following error:
```
device '/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda' expecting node/link 'node'
expected permissions are: nobody::0600
created permissions are : 65534:0:0600
permissions: error
add: ok
remove: ok
```
The ideal fix would probably be to implement `get_user_creds` in Perl, but in this
PR the issue is simply got around by using `daemon` instead of `nobody`.
Closes https://github.com/systemd/systemd/issues/8196.
Followed PEP8 and PEP3101 rules (#8079)
Imports re-ordered by Alphabetical Standarts for following PEP8
Old type string formattings (" example %s " % exampleVar ) re-writed as new type string
formattings ( " example {} ".format(exampleVar) ) for following PEP3101
On Debian/Ubuntu systems the default passwd/group files use a
slightly strange mapping. E.g. in passwd:
```
man❌6:12::/var/cache/man:/sbin/nologin
```
and in group:
```
disk❌6:
man❌12:
```
This is not supported in systemd-sysusers right now because
sysusers will not re-use an existing uid/gid in its normal
mode of operation. Unfortunately this reuse is needed to
replicate the default Debian/Ubuntu users/groups.
This commit enforces reuse when the "uid:gid" syntax is used
to fix this.
I also added a test that replicates the Debian base-passwd
passwd/group file to ensure things are ok.
This is a bit painful because a separate build of systemd is necessary. The
tests are guarded by tests!=false and slow-tests==true. Running them is not
slow, but compilation certainly is. If this proves unwieldy, we can add a
separate option controlling those builds later.
The build for each sanitizer has its own directory, and we build all fuzzer
tests there, and then pull them out one-by-one by linking into the target
position as necessary. It would be nicer to just build the desired fuzzer, but
we need to build the whole nested build as one unit.
[I also tried making systemd and nested meson subproject. This would work
nicely, but meson does not allow that because the nested target names are the
same as the outer project names. If that is ever fixed, that would be the way
to go.]
v2:
- make sure things still work if memory sanitizer is not available
v3:
- switch to syntax which works with meson 0.42.1 found in Ubuntu
This test tests the systemd-sysuser binary via the --root=$TESTDIR
option and ensures that for the given inputs the expected passwd
and group files will be generated.
Let's be more restrictive when validating PID files and MAINPID=
messages: don't accept PIDs that make no sense, and if the configuration
source is not trusted, don't accept out-of-cgroup PIDs. A configuratin
source is considered trusted when the PID file is owned by root, or the
message was received from root.
This should lock things down a bit, in case service authors write out
PID files from unprivileged code or use NotifyAccess=all with
unprivileged code. Note that doing so was always problematic, just now
it's a bit less problematic.
When we open the PID file we'll now use the CHASE_SAFE chase_symlinks()
logic, to ensure that we won't follow an unpriviled-owned symlink to a
privileged-owned file thinking this was a valid privileged PID file,
even though it really isn't.
Fixes: #6632
same motivation as in #5816:
- distributions have scripts to rewrite shebangs on installation and
they know what locations to rely on.
- For tests/compilation we should rather rely on the user to have setup
there PATH correctly.
We need to specify a full path to the "ip" binary and busybox "ip" has a
slightly different output than the normal ip, and won't show "DOWN".
hence instead ensure that at lest not "UP" is in there.
With Type=notify services, EXTEND_TIMEOUT_USEC= messages will delay any startup/
runtime/shutdown timeouts.
A service that hasn't timed out, i.e, start time < TimeStartSec,
runtime < RuntimeMaxSec and stop time < TimeoutStopSec, may by sending
EXTEND_TIMEOUT_USEC=, allow the service to continue beyond the limit for
the execution phase (i.e TimeStartSec, RunTimeMaxSec and TimeoutStopSec).
EXTEND_TIMEOUT_USEC= must continue to be sent (in the same way as
WATCHDOG=1) within the time interval specified to continue to reprevent
the timeout from occuring.
Watchdog timeouts are also extended if a EXTEND_TIMEOUT_USEC is greater
than the remaining time on the watchdog counter.
Fixes#5868.
Since the new option `--network-namespace-path=` of systemd-nspawn
cannot be used together with other network-related options, we need
to add more smoke tests for checking these conditions of options.
Ignore mkosi.builddir. In the future we can also add other patterns
if necessary.
run-intergration-tests.sh is updated to use the new script, and modified
to work from arbitrary directory.
Follow-up for #7494.
We currently look for "nobody" and "nfsnobody" when testing groups, both
of which do not exist on Ubuntu, our main testing environment. Let's
extend the tests slightly to also use "nogroup" if it exists.
