From owner-freebsd-hackers  Mon Nov  9 13:53:33 1998
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Date: Mon, 9 Nov 1998 22:53:10 +0100
From: Eivind Eklund <eivind@yes.no>
To: Steve Kargl <sgk@troutmask.apl.washington.edu>
Cc: hackers@FreeBSD.ORG
Subject: Re: linux software installation and uname
References: <Pine.SGI.4.05.9811091355590.5731-100000@o2.cs.rpi.edu> <199811091947.LAA11148@troutmask.apl.washington.edu>
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In-Reply-To: <199811091947.LAA11148@troutmask.apl.washington.edu>; from Steve Kargl on Mon, Nov 09, 1998 at 11:47:56AM -0800
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On Mon, Nov 09, 1998 at 11:47:56AM -0800, Steve Kargl wrote:
> Here is the nice little uname test from the vendor's install script:
> 
> # what type of target?
> if test -x /usr/bin/uname ; then
>         uname=/usr/bin/uname
> elif test -x /bin/uname ; then
>         uname=/bin/uname
> else
>         # Never seen it anywhere but /bin or /usr/bin, so hopefully it's
>         # in $PATH already.
>         type uname > /dev/null 2>&1
>         if test $? -ne 0 ; then
>                 echo "install: uname not found in \$PATH environment variable"
>                 quit
>         else
>                 uname=uname
>         fi
> fi
> 
> You'll never pick up /compat/linux/bin/uname unless you delete/rename
> /usr/bin/uname.

Eh - I'm pretty sure /compat/linux is searched _before_ /.  For all
syscalls.  This is hardcoded in the linux emulator in the kernel.

So if /compat/linux/bin/uname exists, that will be run in preference
to /bin/uname for anything Linux-emulated.  We might still need a way
of saying that a shell script is Linux-emulated, though - probably by
running it through /compat/linux/bin/sh :-)

Besides this, vendors should be pressured to test for uname in the
right way to make their Linux software also work on FreeBSD.

Eivind.

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