[arch-projects] [mkinitcpio][PATCH 07/11] init: use util-linux's /bin/mount

[Gerardo Exequiel Pozzi]

On 11/12/2011 12:19 PM, Dave Reisner wrote:
> On Sat, Nov 12, 2011 at 02:32:09PM +0100, Thomas Bächler wrote:
>> Am 12.11.2011 03:55, schrieb Dave Reisner:
>>> Providing this means we no longer need blkid for FS detection, as mount
>>> will do this for us. Adds a slight bloat to the image, in exchange for a
>>> huge convenience. Messaging is changed to assume that /bin/mount will
>>> provide useful feedback for us on failure.
>> Once we start going down this road (cp, mount, ...), wouldn't it be
>> better to simply drop busybox?
>>
> Hmm... we're probably close to that point. In terms of size for the
> tradeoff, we'd need (at a minimum) the following binaries to replace
> busybox:
>                    KB
> /bin/bash         733896
> /bin/mknod        31176
> /bin/sleep        27048
> /bin/mkdir        47688
> /usr/bin/env      27064
> /sbin/switch_root 24648
> /bin/grep         134600<-- id prefer to get rid of this
> /usr/bin/stat     72456
> /bin/umount       265568
>
> Someone will throw tomatoes at me for using Bash, but Dash sucks, and
> it makes a truly awful interactive shell.
>
> Additionally, a lot of users would end up bringing in:
>
> /usr/bin/setfont  39800
> /usr/bin/kbd_mode 10400
>
> cat, sed, rm, and cut are used in crypt/lvm/mdadm hooks. I can refactor
> some of that out, but that seems to me like it's liable to break hooks
> that I don't know about. I guess they can BYO via the BINARIES= declare
> in the build function, but let's just consider having them as core for
> funzies:
>
> /bin/cat          47784
> /bin/sed          69184
> /bin/cut          39432
> /bin/rm           55912
>
> shutdown features necessitate cp
>
> /bin/cp           121880
>
> To make the ramfs useful for troubleshooting, add in:
>
> /bin/ls           105832
> /bin/vi           228096
>
> Ditching busybox and adding in all of this brings in an additional
> 1.6MB before library dependencies...
>
> /lib/libacl.so.1      31856
> /lib/libattr.so.1     17248
> /lib/libcap.so.2      17096
> /lib/libdl.so.2       14704
> /lib/libncursesw.so.5 378816
> /lib/libpcre.so.0     371160<- belongs to grep
> /lib/libreadline.so.6 326762
>
> ...an additional 1.1MB. I point out that we should get rid of grep
> because awk from FreeBSD is roughly the size of the grep binary, does
> more, and has zero dependencies beyond libc. My pacman-dev hat wants
> this in the repos anyways for easier testing of makepkg.
>
> I don't have a problem with this -- in the end it'll make my life
> easier.
>
> dave
Good I am also in plans to add "mount" from util-linux in archiso hook.

If busybox is removed, then "dd", "mknod(*)" and "losetup" for archiso. 
There is a work-in-progress in util-linux that uses the new 
"/dev/loop-control" from linux-3.1 (for now only works in mount cmd)

-- 
Gerardo Exequiel Pozzi
\cos^2\alpha + \sin^2\alpha = 1