Follow-up for 4ea8b443de. The logic that manages DnsQueryCandidate is rather
complicated: a calls to dns_query_complete() that wants to destroy a
DnsQueryCandidate can be nested inside a deep chain of calls. Using reference
counts seems like the simplest approach.
DnsSearchDomain already uses reference counting.
This patch effectively brings dns_query_candidate_go() to the state before
4ea8b443de, but wraps the iteration over DnsQueryCandidate.transactions in
dns_query_candidate_ref+dns_query_candidate_unref.
Follow-up for 133b34f69a where this was
forgotten.
While we are at it, bring the parameters into the same order as we
declare them in the PullRaw/PullTar objects, i.e. match them to the
canonical order.
Implement directives `NoExecPaths=` and `ExecPaths=` to control `MS_NOEXEC`
mount flag for the file system tree. This can be used to implement file system
W^X policies, and for example with allow-listing mode (NoExecPaths=/) a
compromised service would not be able to execute a shell, if that was not
explicitly allowed.
Example:
[Service]
NoExecPaths=/
ExecPaths=/usr/bin/daemon /usr/lib64 /usr/lib
Closes: #17942.
The target is update-syscall-tables, so let's call the script
update-syscall-tables.sh to reduce the cognitive overhead when
trying to find the right file.
Upstream uses .text, but this is rather unusual. Let's use .txt as the usual
suffix for text files. This tells various editors and such that the file should
be treated as plain text. I also want to a script to summarize license status,
and having an easy-to-recognize suffix makes this easier.
We don't include a license header in .conf and similar files,
but we should include a header that tells the user that this is
our file and points to some docs.
Even though many of those scripts are very simple, it is easier to include
the header than to try to say whether each of those files is trivial enough
not to require one.
If the file was always generated on the fly, the header would be pointless.
But since we distribute it, it should be there. C.f.
a0e150b2f4.
This was forgotten in 35b42e5600.
Meson itself requires Python 3.6, which has f-strings. So I think it's fine to
use them here too. I wanted to use walrus for 'if m:= re.search(...)', but that'd
require 3.8.
We reject all openat2() calls because it is currently not possible to
inspect its flags parameter via seccomp.
Fallback code is more likely to look for ENOSYS than EPERM.
After all we want to remove the top-level dir, and make it look like the
only subdir, hence propagate the attributes from the subdir to the
top-level dir.
Daan De Meyer
Lennart Poettering
Zbigniew Jędrzejewski-Szmek
Topi Miettinen
Mike Gilbert
Susant Sahani
Yu Watanabe
Luca Boccassi
Franck Bui