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util: relax requirement for logind to be running

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Historically we wanted to check if logind was actually running, not
merely activatable, because on systems where systemd is installed,
but the OS is booted into non-systemd init, we want to fallback to
pm-utils.

Requiring logind to be running, however, forces us to serialize libvirtd
startup on startup of logind which is undesirable. We can relax this
dependancy if we check whether systemd itself is running, which implies
that logind will activated when we need it.

https://gitlab.com/libvirt/libvirt/-/issues/489
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2023-06-21 14:03:25 +01:00
parent 38abf9c34d
commit 29f2222dd5
1 changed files with 12 additions and 0 deletions
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12
src/util/virsystemd.c
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@ -184,9 +184,21 @@ virSystemdHasLogind(void)
return ret;
}
/*
* Want to use logind if:
* - logind is already running
* Or
* - logind is not running, but this is a systemd host
* (rely on dbus activation)
*/
if ((ret = virGDBusIsServiceRegistered("org.freedesktop.login1")) == -1)
return ret;
if (ret == -2) {
if ((ret = virGDBusIsServiceRegistered("org.freedesktop.systemd1")) == -1)
return ret;
}
g_atomic_int_set(&virSystemdHasLogindCachedValue, ret);
return ret;
}