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src/core/manager.c: log preset activity on first boot

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This gives us a little more information about what units were enabled
or disabled on that first boot and will be useful for OS developers
tracking down the source of unit state.

An example with this enabled looks like:

```
NET: Registered PF_VSOCK protocol family
systemd[1]: Applying preset policy.
systemd[1]: Unit /etc/systemd/system/dnsmasq.service is masked, ignoring.
systemd[1]: Unit /etc/systemd/system/systemd-repart.service is masked, ignoring.
systemd[1]: Removed '/etc/systemd/system/sockets.target.wants/systemd-resolved-monitor.socket'.
systemd[1]: Removed '/etc/systemd/system/sockets.target.wants/systemd-resolved-varlink.socket'.
systemd[1]: Created symlink '/etc/systemd/system/multi-user.target.wants/var-mnt-workdir.mount' → '/etc/systemd/system/var-mnt-workdir.mount'.
systemd[1]: Created symlink '/etc/systemd/system/multi-user.target.wants/var-mnt-workdir\x2dtmp.mount' → '/etc/systemd/system/var-mnt-workdir\x2dtmp.mount'.
systemd[1]: Created symlink '/etc/systemd/system/afterburn-sshkeys.target.requires/afterburn-sshkeys@core.service' → '/usr/lib/systemd/system/afterburn-sshkeys@.service'.
systemd[1]: Created symlink '/etc/systemd/system/sockets.target.wants/systemd-resolved-varlink.socket' → '/usr/lib/systemd/system/systemd-resolved-varlink.socket'.
systemd[1]: Created symlink '/etc/systemd/system/sockets.target.wants/systemd-resolved-monitor.socket' → '/usr/lib/systemd/system/systemd-resolved-monitor.socket'.
systemd[1]: Populated /etc with preset unit settings.
```

Considering it only happens on first boot and not on every boot I think
the extra information is worth the extra verbosity in the logs just for
that boot.
This commit is contained in:
Dusty Mabe
2025-05-23 09:18:12 -04:00
committed by Yu Watanabe
parent 61d3133706
commit bdd852a199
1 changed files with 8 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/core/manager.c
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@@ -1893,8 +1893,15 @@ static void manager_preset_all(Manager *m) {
/* If this is the first boot, and we are in the host system, then preset everything */
UnitFilePresetMode mode =
ENABLE_FIRST_BOOT_FULL_PRESET ? UNIT_FILE_PRESET_FULL : UNIT_FILE_PRESET_ENABLE_ONLY;
InstallChange *changes = NULL;
size_t n_changes = 0;
r = unit_file_preset_all(RUNTIME_SCOPE_SYSTEM, 0, NULL, mode, NULL, NULL);
CLEANUP_ARRAY(changes, n_changes, install_changes_free);
log_info("Applying preset policy.");
r = unit_file_preset_all(RUNTIME_SCOPE_SYSTEM, /* file_flags = */ 0,
/* root_dir = */ NULL, mode, &changes, &n_changes);
install_changes_dump(r, "preset", changes, n_changes, /* quiet = */ false);
if (r < 0)
log_full_errno(r == -EEXIST ? LOG_NOTICE : LOG_WARNING, r,
"Failed to populate /etc with preset unit settings, ignoring: %m");