These are also provided by toybox in its default configuration,
and can be turned on in busybox.

Signed-off-by: Dan McGregor <dan.mcgregor@usask.ca>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

The alternative setting for switch_root belongs to the util-linux-switch-root
package instead of the util-linux package. Fix this problem to avoid
a dangling symlink:
   /usr/bin/switch_root-> /usr/bin/switch_root.util-linux
on target and in the sdk.

Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

The alternative setting for unshare belongs to the util-linux-unshare
package instead of the util-linux package. Fix this problem to avoid
a dead symlink /usr/bin/unshare -> /usr/bin/unshare.util-linux on target.

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

busybox may also provide a fsfreeze and nsenter implementation,
so use u-a to allow installing them side by side.
If one installs both, busybox and util-linux, one gets the following error
(seen on a populate-sdk run):

| ERROR: Postinstall scriptlets of ['busybox'] have failed. If the intention is to defer them to first boot,
| then please place them into pkg_postinst_ontarget_${PN} ().
| Deferring to first boot via 'exit 1' is no longer supported.

And the coresponding do_populate_sdk extract:

| ...
| update-alternatives: Error: not linking ...sdk/image/usr/local/oecore-x86_64/sysroots/armv7at2hf-neon-angstrom-linux-gnueabi/usr/sbin/fsfreeze
|     to /bin/busybox.nosuid /bin/busybox.nosuid since ...sdk/image/usr/local/oecore-x86_64/sysroots/armv7at2hf-neon-angstrom-linux-gnueabi/usr/sbin/fsfreeze
|     exists and is not a link
| ...

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

Below commit has added the unshare to alternatives but did not fix the
packaging of the changed file.

,----[ Offending commit ]
| commit 147da8fe7458a38598845958cb358bb094eba57b
| Author: Ioan-Adrian Ratiu <adrian.ratiu@ni.com>
| Date:   Thu Jul 5 11:57:19 2018 +0300
|
|     util-linux.inc: add fallocate & unshare to alternatives
|
|     These binaries can be provided by busybox triggering a conflict in
|     do_rootfs so update-alternatives needs to know about them to properly
|     create the symlinks.
|
|     Signed-off-by: Ioan-Adrian Ratiu <adrian.ratiu@ni.com>
|     Signed-off-by: Ross Burton <ross.burton@intel.com>
`----

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

fallocate was disabled for native/nativesdk in:

http://git.openembedded.org/openembedded-core/commit/?id=17f3c548caf4adec37c3bbb139aa6b3900419794

We have since added uninative support and better glibc handling for SDKs
so this difference can be dropped now.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

Because the util-linux_2.32.bb recipe explicitely disables fallocate
for nativesdk triggering build warnings:

WARNING: nativesdk-util-linux-2.32-r0 do_package: util-linux:
alternative target (sdk/usr/bin/fallocate or sdk/usr/bin/fallocate.util-linux)
does not exist, skipping...
WARNING: nativesdk-util-linux-2.32-r0 do_package: util-linux: NOT adding
alternative provide sdk/usr/bin/fallocate: sdk/usr/bin/fallocate.util-linux
does not exist
WARNING: nativesdk-util-linux-2.32-r0 do_package: util-linux: alt_link ==
alt_target: sdk/usr/bin/fallocate == sdk/usr/bin/fallocate

Signed-off-by: Ioan-Adrian Ratiu <adrian.ratiu@ni.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

These binaries can be provided by busybox triggering a conflict in
do_rootfs so update-alternatives needs to know about them to properly
create the symlinks.

Signed-off-by: Ioan-Adrian Ratiu <adrian.ratiu@ni.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

I hit

update-alternatives: Error: not linking [...]/rootfs/sbin/fstrim to /bin/busybox.nosuid since [...]/rootfs/sbin/fstrim exists and is not a link

The solution seems to be to tell the alternatives system that util-linux
can also provide fstrim.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>