[OE-core] [oe-commits] Chen Qi : busybox: add the ability to split the busybox binary

[Martin Jansa]

On Tue, Jun 25, 2013 at 04:37:58PM +0000, git at git.openembedded.org wrote:
> Module: openembedded-core.git
> Branch: master
> Commit: e5a1442819dfb74e86a6f69da008ba6908c8bbc7
> URL:    http://git.openembedded.org/?p=openembedded-core.git&a=commit;h=e5a1442819dfb74e86a6f69da008ba6908c8bbc7
> 
> Author: Chen Qi <Qi.Chen at windriver.com>
> Date:   Mon Jun 17 12:47:20 2013 +0800
> 
> busybox: add the ability to split the busybox binary
> 
> This patch enables us to split the busybox into two binaries, one
> containing suid applications, and the other containing nosuid apps.
> 
> Add a variable, BUSYBOX_SPLIT_SUID, to control whether to split the
> busybox binary into two parts. We default it to "1" to enable the
> splitting, but users could still override it to disable the splitting.
> After all, busybox has no internal support for this suid apps splitting,
> so there might be users out there who want just one busybox binary.
> 
> The basic idea here is to build the busybox twice, each with the correct
> configuration items. We extract the non-app part of the original .config
> file, and merge this part with the suid-app part to form a .config which
> contains only suid apps. The same strategy applies to the non-suid apps.

Hi,

have you tried to do on-device upgrade with this change?
It looks very broken, description follows:

13:48:33 < JaMa> was sed applet removed from busybox or something like that? upgrade path seems to be broken
13:48:34 < JaMa> Configuring busybox-syslog.
13:48:34 < JaMa> /usr/bin/update-alternatives: line 186: sed: not found
13:48:58 < JaMa> and then all applets in main busybox package fail to set u-a because of missing sed..
13:49:27 < JaMa> and then fixing that is more complicated because wget symlink is gone too, so opkg update opkg upgrade wont work
13:49:40 < zecke> JaMa: IIRC the specific postinst was removed from busybox?!
13:50:55 < JaMa> /var/lib/opkg/info/busybox.postinst is still there
13:51:02 < JaMa> with a lot of u-a calls
13:51:34 < zecke> JaMa: generated by the bbclass and not the one that was in the busybox.inc (but i only read the digest and skip stuff)
13:51:37 < JaMa> that commit says it removes redundant u-a
13:52:11 < JaMa> SHR root at gjama ~ $ grep sed /var/lib/opkg/info/busybox.postinst   update-alternatives --install /bin/sed sed /bin/busybox.nosuid 50
13:52:23 < zecke> JaMa: Do you know if they/he tested on device upgrade?
13:52:56 < zecke> i am obviously just guessing
13:54:05 < JaMa> all u-a are still pointing to /bin/busybox, but that one is gone replaced by /bin/busybox.(no)suid
13:54:44 < JaMa> we should install /bin/busybox -> /bin/busybox.nosuid to fix upgrade path..
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