[Buildroot] Adding my applications to the image generated

[Grant Edwards]

On 2012-10-09, Chris Westervelt <chris.westervelt at advantor.com> wrote:

> I'm new to build root but a long time LTIB user.  In LTIB, we had a
> way to 'merge' our custom files to the final build by putting them in
> a merge directory that replicated the directory hierarchy with the
> files in each level of the tree.  Is there a way to do this in
> Buildroot?

There are several ways to do it:

http://buildroot.uclibc.org/downloads/manual/manual.html#_customizing_the_generated_target_filesystem

Using the "customize" package is depricated, and I think will be
eliminated in the near future.  It sounds to me like you probably want
to define a post-build script that merges your custom files files into
the target tree after it's been built.

I've placed a tree of files to be merged in "../custom-files" and the
post-build script copies them into the target directory.  My
post-build script shown below.  The line the does the merging of my
custom files is the 'tar' command.  The rest of the script tweaks some
of the pre-existing files.

Once you've written a post-build script, you need to set the the 
BR2_ROOTFS_POST_BUILD_SCRIPT configuration variable to point to it:

In my .config file:

BR2_ROOTFS_POST_BUILD_SCRIPT="../postbuild.sh"



------------------------------postbuild.sh------------------------------
#/bin/bash

echo ">>>   Post-build script start"
TARGET="$1"
set -x

# modify snmpd init script so that it listens on all interfaces rather
# than only on 127.0.0.1
sed -i '/^SNMPDOPTS/ s/ *127\.0\.0\.1//g' $TARGET/etc/init.d/S*snmpd

# copy custom-files
tar -c -f - -C ../custom-files --exclude-vcs --exclude-backup . | \
          tar -v -x -f - -C "$TARGET"

# set some global env variables by exporting them in rcS
sed -i -e '/^export PATH=/ d'                    $TARGET/etc/init.d/rcS
sed -i -e '/^export LD_LIBRARY_PATH=/ d'         $TARGET/etc/init.d/rcS
sed -i -e '2 iexport PATH=$PATH:/apps/bin'       $TARGET/etc/init.d/rcS
sed -i -e '2 iexport LD_LIBRARY_PATH=/apps/lib'  $TARGET/etc/init.d/rcS

# tweak PHP settings
sed -i -e 's/^upload_max_filesize.*/upload_max_filesize = 10M/g' $TARGET/etc/php.ini

# make sure ssh keys aren't readable by anybody except owner
chmod go-rwx $TARGET/etc/ssh_*_key

set +x
echo ">>>   Post-build script done"
------------------------------------------------------------------------


-- 
Grant Edwards               grant.b.edwards        Yow! I want a VEGETARIAN
                                  at               BURRITO to go ... with
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