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Two functional changes:
- "/" is now refused. The test is adjusted.
- The trailing NUL is *not* included in the returned size for abstract size. The
comments in sockaddr_un_set_path() indicate that this is the right thing to do,
and the code in socket_address_parse() wasn't doing that.
Closes#12624.
The formatting in systemd.socket.xml is updated a bit.
Currently in_addr_port_ifindex_name_to_string() always prints the ifindex
numerically. This is not super useful since the interface numbers are
semi-random. Should we use interface names in preference?
We would set .type to a fake value. All real callers (outside of tests)
immediately overwrite .type with a proper value after calling
socket_address_parse(). So let's not set it and adjust the few places
that relied on it being set to the fake value.
socket_address_parse() is modernized to only set the output argument on
success.
One special syntax is not supported anymore: "iface:port" would be parsed as an
interface name plus numerical port, equivalent to "[::]%iface:port". This was
added in 542563babd, but was undocumented, and we had no tests for it. It seems
that this actually wasn't doing anything useful, because the kernel only uses the
scope identifier for link-local addresses.
We don't try to resolve invalid ifnames as all. A different return
code is used. This difference will be verified later in test_socket_address_parse()
when socket_address_parse() is converted to use
in_addr_port_ifindex_name_from_string_auto().
If the interface scope is specified, this changes the meaning of the address
quite significantly. Let's show the IPv6 scope_id if present.
Sadly we don't even have a test for sockaddr_pretty() output :(
This will be implicitly tested through socket_address_parse() later on.
We would use the return value from the tested function to decide
what to print as "expected", which is confusing when something is wrong
with the tested function.
There is a minor functional change:
IPV6_FREEBIND is set of IPv6 sockets, not IP_FREEBIND. This was missed in
af8b1384, but I noticed only after the merging the two functions.
And a not-so-minor functional chagnge:
7216a3b5dc changed manager_dns_stub_tcp_fd_extra() to return the fd even
if the source was already initialized, but it didn't do the same change for
manager_dns_stub_udp_fd_extra(), so it would return 0 in that case. But
0354029bf5 uses manager_dns_stub_udp_fd_extra() when preparing to call
manager_send(), and will pass 0 as the fd in that case. For both socket types
fd is now always returned.
This really doesn't matter given that AF_xyz and PF_xyz are equivalent
in all ways, but we almost always use AF_xyz, hence stick to it
universally and convert the remaining PF_ to AF_
This is useful for duplicating trees that contain hardlinks: we keep
track of potential hardlinks and try to reproduce them within the
destination tree. (We do not hardlink between source and destination!).
This is useful for trees like ostree images which heavily use hardlinks
and which are otherwise exploded into separate copies of all files when
we duplicate the trees.
KEY_RESTART is widely used in Linux to indicate device reboot.
So lets handle it in the same fashion as KEY_POWER.
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
The list was rather ad hoc, with "reset-failed" sandwiched between
"help" and "list-dependencies". Since a person will usually either want
to introspect state in various ways or modify state in a certain way, let's
put all the introspection commands together and all the ones that actually
have an effect second.
The securebit keep-caps retains the capabilities in the permitted set
over an UID change (ambient capabilities are cleared though).
Setting the keep-caps securebit after the uid change and before execve
doesn't make sense as it is cleared during execve and there is no
additional user ID change after this point.
Altough the documentation (man 7 capabilities) is ambigious, keep-caps
is reset during execve although keep-caps-locked is set. After execve
only keep-caps-locked is set and keep-caps is cleared.
Behaviour is not identical, as shown by the tests in test-strv.
The combination of EXTRACT_UNQUOTE without EXTRACT_RELAX only appears in
the test, so it doesn't seem particularly important. OTOH, the difference
in handling of squished parameters could make a difference. New behaviour
is what both bash and python do, so I think we can ignore this corner case.
This change has the following advantages:
- the duplication of code paths that do a very similar thing is removed
- extract_one_word() / strv_split_extract() return a proper error code.
The tricky part here is that the function is not allowed to fail in this code
path. Initially, I wanted to change the return value to allow it to fail, but
this cascades through all the places where fstab_test_option() and friends are
used; updating all those sites would be a lot of work. And since quoting is not
allowed here, a simple loop with strcspn() is easy to do.
