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authorArnout Vandecappelle (Essensium/Mind) <arnout@mind.be>2013-02-05 07:16:00 +0000
committerPeter Korsgaard <jacmet@sunsite.dk>2013-02-05 21:35:33 +0100
commit7f86089292e4fa7e6a7b1907611bd007153f452a (patch)
tree822aad879d4707ff0e5f83293a10fc8df92baebe /docs/manual
parenta0ad75a1255a742b4e4c95e7becf56b20dfecda3 (diff)
downloadbuildroot-novena-7f86089292e4fa7e6a7b1907611bd007153f452a.tar.gz
buildroot-novena-7f86089292e4fa7e6a7b1907611bd007153f452a.zip
target/generic: add filesystem overlay option
The filesystem overlay is a tree that is copied over the target fs after building everything - which is currently usually done in the post-build script. [Peter: don't ignore missing directories] Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Acked-by: Luca Ceresoli <luca@lucaceresoli.net> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Diffstat (limited to 'docs/manual')
-rw-r--r--docs/manual/customize-rootfs.txt17
-rw-r--r--docs/manual/customize-store.txt13
2 files changed, 16 insertions, 14 deletions
diff --git a/docs/manual/customize-rootfs.txt b/docs/manual/customize-rootfs.txt
index 6399699bd..fa04d85e2 100644
--- a/docs/manual/customize-rootfs.txt
+++ b/docs/manual/customize-rootfs.txt
@@ -24,6 +24,12 @@ there are a few ways to customize the resulting target filesystem.
skeleton are copied to output/target before any package
installation.
+* Create a filesystem overlay: a tree of files that are copied directly
+ over the target filesystem after it has been built. Set
+ +BR2_ROOTFS_OVERLAY+ to the top of the tree. +.git+, +.svn+,
+ +.hg+ directories and files ending with +~+ are excluded.
+ _Among these first 3 methods, this one should be preferred_.
+
* In the Buildroot configuration, you can specify the path to a
*post-build script*, that gets called 'after' Buildroot builds all the
selected software, but 'before' the rootfs packages are
@@ -31,12 +37,11 @@ there are a few ways to customize the resulting target filesystem.
specify the location of your post-build script. This option can be
found in the +System configuration+ menu. The destination root
filesystem folder is given as the first argument to this script,
- and this script can then be used to copy programs, static data or
- any other needed file to your target filesystem. You should,
- however, use this feature with care. Whenever you find that a
- certain package generates wrong or unneeded files, you should fix
- that package rather than work around it with a post-build cleanup
- script. _Among these first 3 methods, this one should be preferred_.
+ and this script can then be used to remove or modify any file in your
+ target filesystem. You should, however, use this feature with care.
+ Whenever you find that a certain package generates wrong or unneeded
+ files, you should fix that package rather than work around it with a
+ post-build cleanup script.
You may also use these variables in your post-build script:
- +BUILDROOT_CONFIG+: the path to the Buildroot .config file
- +HOST_DIR+, +STAGING_DIR+, +TARGET_DIR+: see
diff --git a/docs/manual/customize-store.txt b/docs/manual/customize-store.txt
index b6e3d0813..298b5e96a 100644
--- a/docs/manual/customize-store.txt
+++ b/docs/manual/customize-store.txt
@@ -136,15 +136,12 @@ you can skip the steps that are not relevant for your use case.
1. Create +board/<manufacturer>/<boardname>/fs-overlay/+ and fill it
with additional files you need on your rootfs, e.g.
+board/<manufacturer>/<boardname>/fs-overlay/etc/inittab+.
+ Set +BR2_ROOTFS_OVERLAY+
+ to +board/<manufacturer>/<boardname>/fs-overlay+.
1. Create a post-build script
- +board/<manufacturer>/<boardname>/post-build.sh+. It should contain
- the following command:
-+
-------------
-rsync -a --exclude .empty --exclude '*~' ${0%/*}/fs-overlay $1
-------------
-+
-1. Set +BR2_ROOTFS_POST_BUILD_SCRIPT+ to +board/<manufacturer>/<boardname>/post-build.sh+
+ +board/<manufacturer>/<boardname>/post-build.sh+. Set
+ +BR2_ROOTFS_POST_BUILD_SCRIPT+ to
+ +board/<manufacturer>/<boardname>/post-build.sh+
1. If additional setuid permissions have to be set or device nodes have
to be created, create +board/<manufacturer>/<boardname>/device_table.txt+
and add that path to +BR2_ROOTFS_DEVICE_TABLE+.