linux-kernel - Re: [PATCH] Use full path to dnsdomainname and domainname in scripts/mkcompile

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Date:	Wed, 20 Jan 2010 11:26:51 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Glenn Sommer <glemsom@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Use full path to dnsdomainname and domainname in 
	scripts/mkcompile_h

On Wed, Jan 20, 2010 at 2:29 AM, Glenn Sommer <glemsom@...il.com> wrote:
> With reference to: http://bugzilla.kernel.org/show_bug.cgi?id=14920
> I'll post my suggestion here.
>
> Currently scripts/mkcompile_h checks for "/bin/dnsdomainname" and
> "/bin/domainname" when trying to find the DNS name.
> Though, when running the executable - the full path isn't used!
>
> IMO if we check for "/bin/dnsdomainname", we should also use
> "/bin/dnsdomainname" - and not blindly trust /bin is the first directory in
> $PATH  which contains a executable named "dnsdomainname"
>
>
> I propose to use the full path, that we know is valid. Here's my proposed patch:
>
>
> --- scripts/mkcompile_h.orig    2009-12-28 23:02:34.000000000 +0100
> +++ scripts/mkcompile_h 2009-12-28 23:03:12.000000000 +0100
> @@ -66,9 +66,9 @@
>   echo \#define LINUX_COMPILE_HOST \"`hostname | $UTS_TRUNCATE`\"
>
>   if [ -x /bin/dnsdomainname ]; then
> -    echo \#define LINUX_COMPILE_DOMAIN \"`dnsdomainname | $UTS_TRUNCATE`\"
> +    echo \#define LINUX_COMPILE_DOMAIN \"`/bin/dnsdomainname | $UTS_TRUNCATE`\"
>   elif [ -x /bin/domainname ]; then
> -    echo \#define LINUX_COMPILE_DOMAIN \"`domainname | $UTS_TRUNCATE`\"
> +    echo \#define LINUX_COMPILE_DOMAIN \"`/bin/domainname | $UTS_TRUNCATE`\"
>   else
>     echo \#define LINUX_COMPILE_DOMAIN
>   fi
>
>
> Signed-off-by: Glenn Sommer <glemsom@...il.com>

Makes sense, but is that possible we have 'domainname' installed in two
different directories?
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