That file contains a bunch of entries of which only some are related to SysV.
The rest are just "traditional APIs" that need to stay. In particular,
/var/lock a.k.a. /run/lock is used by many programs (LVM, iscsi, alsactl).
Similarly, the README about /var/log is something that should stay as long as
we have people migrating from older systems or using the copiuos documentation
that mentions /var/log/messages.txt on the Internet.
/var/lock/subsys is only used by sysvinit, and our code to support /forcefsck,
/fastboot, and /forcequotacheck is conditionalized on HAVE_SYSV_COMPAT, so
conditionalize those here on HAVE_SYSV_COMPAT too.
Follow-up for 2b07a3211b.
Fixes the failure found in
https://autopkgtest.ubuntu.com/results/autopkgtest-noble-upstream-systemd-ci-systemd-ci/noble/amd64/s/systemd-upstream/20241115_182040_92382@/log.gz
. Relevant logs:
```
Nov 16 02:48:36 systemd-networkd[2706]: veth99: Reconfiguring with /run/systemd/network/25-dhcp-client-ipv6-only.network.
Nov 16 02:48:36 systemd-networkd[2706]: veth99: NDISC: Started IPv6 Router Solicitation client
Nov 16 02:48:36 systemd-networkd[2706]: veth99: IPv6 Router Discovery is configured and started.
Nov 16 02:48:36 systemd-networkd[2706]: veth99: NDISC: Sent Router Solicitation, next solicitation in 3s
Nov 16 02:48:36 systemd-networkd[2706]: veth99: NDISC: Received Router Advertisement from fe80::1034:56ff:fe78:9abd: flags=0xc0(managed, other), preference=medium, lifetime=30min
Nov 16 02:48:36 systemd-networkd[2706]: veth99: NDISC: Invoking callback for 'router' event.
Nov 16 02:48:36 systemd-networkd[2706]: veth99: link_check_ready(): dynamic addressing protocols are enabled but none of them finished yet.
Nov 16 02:48:36 systemd-networkd[2706]: veth99: DHCPv6 client: Starting in Solicit mode
Nov 16 02:48:36 systemd-networkd[2706]: veth99: DHCPv6 client: State changed: stopped -> solicitation
Nov 16 02:48:36 systemd-networkd[2706]: veth99: Acquiring DHCPv6 lease on NDisc request
Nov 16 02:48:36 systemd-networkd[2706]: veth99: DHCPv6 client: Sent Solicit
Nov 16 02:48:36 systemd-networkd[2706]: veth99: DHCPv6 client: Next retransmission in 1s
Nov 16 02:48:37 systemd-networkd[2706]: veth99: DHCPv6 client: Sent Solicit
Nov 16 02:48:37 systemd-networkd[2706]: veth99: DHCPv6 client: Next retransmission in 1s
Nov 16 02:48:39 systemd-networkd[2706]: veth99: NDISC: Received Neighbor Advertisement from fe80::1034:56ff:fe78:9abd: Router=yes, Solicited=yes, Override=no
Nov 16 02:48:39 systemd-networkd[2706]: veth99: NDISC: Invoking callback for 'neighbor' event.
Nov 16 02:48:39 systemd-networkd[2706]: veth99: DHCPv6 client: Processed Reply message
Nov 16 02:48:39 systemd-networkd[2706]: veth99: DHCPv6 client: T1 expires in 50s
Nov 16 02:48:39 systemd-networkd[2706]: veth99: DHCPv6 client: T2 expires in 55s
Nov 16 02:48:39 systemd-networkd[2706]: veth99: DHCPv6 client: Valid lifetime expires in 2min
Nov 16 02:48:39 systemd-networkd[2706]: veth99: DHCPv6 client: State changed: solicitation -> bound
Nov 16 02:48:39 systemd-networkd[2706]: veth99: DHCPv6 address 2600::15/128 (valid for 1min 59s, preferred for 1min 59s)
Nov 16 02:48:41 systemd-networkd[2706]: veth99: Received updated DHCPv6 address (configured): 2600::15/128 (valid for 1min 58s, preferred for 1min 58s), flags: no-prefixroute, scope: global
Nov 16 02:48:41 systemd-networkd[2706]: veth99: DHCPv6 addresses and routes set.
Nov 16 02:48:41 systemd-networkd[2706]: veth99: link_check_ready(): IPv4LL:no DHCPv4:no DHCPv6:yes DHCP-PD:no NDisc:no
Nov 16 02:48:41 systemd-networkd[2706]: veth99: State changed: configuring -> configured
```
The interface veth99 entered the configured state after 5 seconds, but
at the same time, the `wait_online()` in the test script considered the
test failed.
The function `wait_online()` first invokes
`systemd-networkd-wait-online` with `--timeout=20`, then check setup
states of interfaces with 5 seconds timeout. So, the failure suggests
that `systemd-networkd-wait-online` finishes immediately, as the state
file was not updated when it is invoked, and thus it handles the
interface veth99 already in the configured state.
Otherwise, nexthop ID may contain e.g. 300, then
===
AssertionError: '300' unexpectedly found in
'default nhid 3860882700 via fe80::1034:56ff:fe78:9a99 proto ra metric 512 expires 1798sec pref high\n
default nhid 2639230080 via fe80::1034:56ff:fe78:9a98 proto ra metric 2048 expires 1798sec pref low'
===
"nsenter -a" doesn't migrate the specified process into the target
cgroup (it really should). Thus the cgroup will remain in a cgroup
that is (due to cgroup ns) outside our visibility. The kernel will
report the cgroup path of such cgroups as starting with "/../". Detect
that and print a reasonably error message instead of trying to resolve
that.
```
$ systemd-cryptenroll /dev/vda3
SLOT TYPE
0 password
$ systemd-cryptenroll --wipe-slot 1 /dev/vda3
Failed to wipe slot 1, continuing: No such file or directory
```
We now distinguish two cases: where the list of self modifiable fields
is explicitly set to empty, and where the default is empty.
Let's display them differently in the output. When set explicitly to
empty let's mention the admin, otherwise just say "none".
For system users we should lock things down, hence generate an empty
list.
This is mostly a safety precaution, but also hides really confusing
output of "userdbctl user" for an system user.
Follow-up for: a192250eda
For my understanding bsearch is searching in the wrong array. Or, if
it's the right one, then the size is wrong. In another commit I made the
arrays different by mistake and that triggered a SIGSEV during tests.
"systemctl status systemd-logind" otherwise looks a bit weird, since the
tasks and the fdstore lines are so close to each other but formatted
quite differently when it comes to coloring.
Currently, get_fixed_user() employs USER_CREDS_SUPPRESS_PLACEHOLDER,
meaning home path is set to NULL if it's empty or root. However,
the path is also used for applying WorkingDirectory=~, and we'd
spuriously use the invoking user's home as fallback even if
User= is changed in that case.
Let's instead delegate such suppression to build_environment(),
so that home is proper initialized for usage at other steps.
shell doesn't actually suffer from such problem, but it's changed
too for consistency.
Alternative to #34789
