[systemd-devel] minimal required units
sztanpet at gmail.com
Thu Mar 12 09:32:36 PDT 2015
man 7 systemd.special
On Thu, Mar 12, 2015 at 4:41 PM, <Aaron_Wright at selinc.com> wrote:
> Andrei Borzenkov <arvidjaar at gmail.com> wrote on 03/11/2015 08:47:43 PM:
>> From: Andrei Borzenkov <arvidjaar at gmail.com>
>> To: Aaron_Wright at selinc.com
>> Cc: systemd-devel at lists.freedesktop.org
>> Date: 03/11/2015 08:47 PM
>> Subject: Re: [systemd-devel] minimal required units
>> В Wed, 11 Mar 2015 12:02:29 -0700
>> Aaron_Wright at selinc.com пишет:
>> > I'm trying to make an embedded device, and I would like to start with
>> > the
>> > minimal setup as possible. Are there some units that are required by
>> > systemd?
>> > I ask because systemd is complaining about a missing rescue.target unit,
>> When does it do it?
> It was doing this because my default unit was not set correctly. But that
> isn't really the question. The question is, what units are required by
> systemd? How can I figure that out? It seems like rescue.target,
> local-fs.target, and local-fs-pre.target are required, but I've only
> discovered that after trial and error. I know the systemd.special man page
> lists a ton of special units, but it seems that not all of them are
> required. Right? Well, which ones are? I feel like I need to look through
> the code to see when a hardcoded unit is referenced, like rescue.target was,
> that I don't know about.
> My device doesn't have many of the same requirements of a full desktop or
> server Linux, so I'm trying to strip out things from systemd, unit wise,
> that I don't want or need. I've customized sysinit.target and basic.target
> to just reference the units I want. And that seems to be going smooth, but
> it appears there are other units, that I didn't know about that are
> required, but that aren't documented as such (that I could find). This
> scares me a bit.
>> > but I don't list rescue.target as a dependency of any other unit.
>> > However, grep tells me that /usr/lib/systemd/systemd contains the
>> > "rescue.target" string, which worries me. Is there a list of all the
>> > units
>> > that are required, even though no other unit lists them?
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