linux-kernel - Re: [PATCH] kbuild: use hostname -s along uname to obtain LINUX_COMPILE

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Date:   Fri, 1 Apr 2022 23:19:22 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     FraSharp <f.duca00@...il.com>
Cc:     Francesco Duca <s23265@...ve.it>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kbuild: use hostname -s along uname to obtain LINUX_COMPILE_HOST

On Fri, Apr 1, 2022 at 11:04 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> On Thu, Mar 31, 2022 at 3:23 AM FraSharp <f.duca00@...il.com> wrote:
> >
> > From: Francesco Duca <s23265@...ve.it>
> >
> > * On some systems (e.g. macOS), using commands like 'uname -n' or
> >   'hostname' will print something similar to "hostname.domain"
>
>
> Not only macOS, but also on Linux systems such as Fedora, Debian.
>
> 'uname -s' or 'hostname' prints "hostname.domain"

I mean,

    'uname -n' or 'hostname' prints "hostname.domain"



>
>
>
> >   ("Francescos-Air.fritz.box" for example), which is very annoying.
>
> I do not think so.
>
>
> >   What works instead is 'hostname -s', which will only write hostname
> >   without the domain ("Francescos-Air" for example),
> >   but also keep 'uname -n', as some systems as Arch Linux does not have
> >   'hostname' as command.
>
> If so, on Arch Linux, will this patch spit
>   hostname: command not found
> error message because   "2>/dev/null" is missing ?
>
>
> And, the intention of this patch is,
> print  Francescos-Air if the 'hostname -s' command is available,
> but Francescos-Air.fritz.box  otherwise, correct  ?
>
>
>
>
>
>
> >
> > * This commit is complementary to
> >   1e66d50ad3a1dbf0169b14d502be59a4b1213149
> >   ("kbuild: Use uname for LINUX_COMPILE_HOST detection")
> >
> > Signed-off-by: Francesco Duca <s23265@...ve.it>
> > ---
> >  scripts/mkcompile_h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
> > index ca40a5258..6054e3eee 100755
> > --- a/scripts/mkcompile_h
> > +++ b/scripts/mkcompile_h
> > @@ -34,7 +34,7 @@ else
> >         LINUX_COMPILE_BY=$KBUILD_BUILD_USER
> >  fi
> >  if test -z "$KBUILD_BUILD_HOST"; then
> > -       LINUX_COMPILE_HOST=`uname -n`
> > +       LINUX_COMPILE_HOST=$(hostname -s || uname -n)
> >  else
> >         LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
> >  fi
> > --
> > 2.32.0 (Apple Git-132)
> >
>
>
> --
> Best Regards
> Masahiro Yamada



-- 
Best Regards
Masahiro Yamada