From owner-freebsd-hackers@FreeBSD.ORG Mon Sep 3 13:44:30 2007 Return-Path: Delivered-To: hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3B18516A41B; Mon, 3 Sep 2007 13:44:30 +0000 (UTC) (envelope-from yar@comp.chem.msu.su) Received: from comp.chem.msu.su (comp.chem.msu.su [158.250.32.97]) by mx1.freebsd.org (Postfix) with ESMTP id A13BC13C458; Mon, 3 Sep 2007 13:44:27 +0000 (UTC) (envelope-from yar@comp.chem.msu.su) Received: from comp.chem.msu.su (localhost [127.0.0.1]) by comp.chem.msu.su (8.13.4/8.13.4) with ESMTP id l83DKA35060568; Mon, 3 Sep 2007 17:20:10 +0400 (MSD) (envelope-from yar@comp.chem.msu.su) Received: (from yar@localhost) by comp.chem.msu.su (8.13.4/8.13.4/Submit) id l83DKApl060567; Mon, 3 Sep 2007 17:20:10 +0400 (MSD) (envelope-from yar) Date: Mon, 3 Sep 2007 17:20:09 +0400 From: Yar Tikhiy To: Giorgos Keramidas Message-ID: <20070903132009.GI30502@comp.chem.msu.su> References: <20070901073440.GL85633@comp.chem.msu.su> <46DAFE5C.6070806@freebsd.org> <20070903001803.GA8098@kobe.laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=koi8-r Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20070903001803.GA8098@kobe.laptop> User-Agent: Mutt/1.5.9i Cc: hackers@freebsd.org, Tim Kientzle Subject: Re: Useful tools missing from /rescue X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Sep 2007 13:44:30 -0000 On Mon, Sep 03, 2007 at 03:18:03AM +0300, Giorgos Keramidas wrote: > On 2007-09-02 11:18, Tim Kientzle wrote: > > Yar Tikhiy wrote: > >> In addition, there are chflags and chmod in /rescue, but there's no > >> chown in it, so the toolset is a bit incomplete. > > > > Oh, my. chown was definitely an oversight. That > > should have been in there. > > Probably because chown is a relatively big binary. If build as a static > binary here, it ends up being: > > $ pwd > /home/keramida/bsd/src/usr.sbin/chown > $ make DEBUG_FLAGS='' NO_SHARED=yes all > [...] > $ ls -ld chown > -rwxrwxr-x 1 keramida users - 2297013 Sep 3 03:06 chown > $ strip -s chown > $ ls -ld chown > -rwxrwxr-x 1 keramida users - 550624 Sep 3 03:06 chown > $ > > This will get smaller when crunched, but it's still almost 4x the size > of chmod: > > $ pwd > /home/keramida/bsd/src/bin/chmod > $ make DEBUG_FLAGS='' NO_SHARED=yes all > [...] > $ ls -ld chmod > -rwxrwxr-x 1 keramida users - 662678 Sep 3 03:08 chmod > $ strip -s chmod > $ ls -ld chmod > -rwxrwxr-x 1 keramida users - 165884 Sep 3 03:08 chmod > $ > > Running nm(1) on the binaries, I see that they have the same symbols > though: > > $ nm -S chmod | awk '{print $2,$3,$4}' | sort > /tmp/symbols.chmod > $ nm -S chown | awk '{print $2,$3,$4}' | sort > /tmp/symbols.chown > $ diff -u /tmp/symbols.chmod /tmp/symbols.chown > $ > > Does this mean that adding chown to the already crunched binary will not > cause a lot of bloat because of symbols/functions private to chown? The difference in the static binary sizes is weird, but I don't have time now to dig the issue deeper, sorry. The rescue binary grows just slightly when chown is added to it: -r-xr-xr-x 121 root wheel 3715096 1 ΣΕΞ 10:22 /rescue.old/rescue -r-xr-xr-x 122 root wheel 3718192 3 ΣΕΞ 17:17 /rescue/rescue -- Yar