For use with sysupdate or other systemd tooling, it's useful to be
able to generate split artifacts from disk images, where each
partition is written to a separate file. Let's support this with
a --split switch for repart and a SplitName= configuration option.
--split enables split artifacts generation, and SplitName= configures
for which partition to generate split artifacts, and which suffix to
add to the split artifact name.
For SplitName=, we add support for some extra specifiers, more specifically
the partition Type UUID and the partition UUID.
All users were setting this to some static string (usually "-"), so let's
simplify things by not doing strdup, but instead limiting callers to a fixed
set of values. In preparation for the next commit, the function is renamed from
"empty" to "replacement", because it'll be used for more than empty fields. I
didn't do the whole string-table setup, because it's all used internally in one
file and this way we can immediately assert if an invalid value is passed in.
Some callers were (void)ing the error, others were ignoring it, and others
propagating. It's nicer to remove the boilerplate.
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.
```
We forgot to conditionalize this on pcrsig/pcrpkey too. So if you have
ne creds or sysext configured we actually wouldn't pass pcrsig/pcrpkey
along. Let's fix that.
To make this work, we have to set up everything in a temporary
directory tree that we can pass to mksquashfs as a single directory.
To make the most common scenario more efficient, we skip the temporary
setup directory if we only get a single source tree destined to root
in the squashfs filesystem.
Previously, existing device units for devlinks or aliases were not
removed unless the main device unit is removed. This makes all existing
device units for devlinks and aliases are checked if they are still
required, and remove if not necessary anymore.
Fixes#24518.
Daan De Meyer
Luca Boccassi
Antonio Alvarez Feijoo
Lennart Poettering
Zbigniew Jędrzejewski-Szmek
Frantisek Sumsal
Joost Heitbrink
Edson Juliano Drosdeck
наб
Yu Watanabe