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References: <20210825163520.Horde.SwfJDAmwq6x_Wn-Vf4FoTSG@crashcourse.ca>
In-Reply-To: <20210825163520.Horde.SwfJDAmwq6x_Wn-Vf4FoTSG@crashcourse.ca>
From: "Alexander Kanavin" <alex.kanavin@gmail.com>
Date: Wed, 25 Aug 2021 22:56:14 +0200
Message-ID: <CANNYZj-PJQTLydecmn9EpWdci5wWce_9Tkw_QkOGkProY6t_fQ@mail.gmail.com>
Subject: Re: [OE-core] what means the test 'if [ -z "$D" ]' in a pkg_postinst routine?
To: "Robert P. J. Day" <rpjday@crashcourse.ca>
Cc: OE-core <openembedded-core@lists.openembedded.org>
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If you show the confusing examples, we could try to figure it out.

Alex

On Wed, 25 Aug 2021 at 22:35, Robert P. J. Day <rpjday@crashcourse.ca>
wrote:

>
> there will be many more questions about pkg_postinst (and related)
> routines shortly, but digging into these for the first time, i
> thought that that test checked whether the routine was being run
> at image creation time, or at first-time boot. now i'm not quite
> sure what to think after seeing several examples.
>
> what does the test for null or non-null variable "D" mean in
> a pkg_postinst routine? and once i figure all this out, i may
> very well contribute some enhanced docs for the next confused
> person.
>
> rday
>
>
> 
>
>

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<div dir=3D"ltr"><div>If you show the confusing examples, we could try to f=
igure it out.</div><div><br></div><div>Alex<br></div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, 25 Aug 2021 =
at 22:35, Robert P. J. Day &lt;<a href=3D"mailto:rpjday@crashcourse.ca">rpj=
day@crashcourse.ca</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote=
" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);=
padding-left:1ex"><br>
there will be many more questions about pkg_postinst (and related)<br>
routines shortly, but digging into these for the first time, i<br>
thought that that test checked whether the routine was being run<br>
at image creation time, or at first-time boot. now i&#39;m not quite<br>
sure what to think after seeing several examples.<br>
<br>
what does the test for null or non-null variable &quot;D&quot; mean in<br>
a pkg_postinst routine? and once i figure all this out, i may<br>
very well contribute some enhanced docs for the next confused<br>
person.<br>
<br>
rday<br>
<br>
<br>
<br>
<br>
</blockquote></div>

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