[Buildroot] [PATCH v3 2/6] docs/manual: mention the new post-image mechanism

Thomas Petazzoni thomas.petazzoni at free-electrons.com
Thu Feb 7 21:58:44 UTC 2013

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
 * Fix typos noticed by Yann.
 * Mention that the post-image scripts are executed as the user
   executing Buildroot, i.e generally not the root user. Suggested by
   Samuel Martin.
 docs/manual/customize-rootfs.txt |   22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/docs/manual/customize-rootfs.txt b/docs/manual/customize-rootfs.txt
index fa04d85..97af580 100644
--- a/docs/manual/customize-rootfs.txt
+++ b/docs/manual/customize-rootfs.txt
@@ -55,3 +55,25 @@ there are a few ways to customize the resulting target filesystem.
   target root filesystem in +package/customize/source+, and then
   enable this special package in the configuration system. _This
   method is marked as deprecated_.
+Note also that if you want to perform some specific actions *after*
+all filesystem images have been created (for example to automatically
+extract your root filesystem tarball in a location exported by your
+NFS server, or to create a special firmware image that bundles your
+root filesystem and kernel image, or any other custom action), you can
+specify a space-separated list of scripts in the
++BR2_ROOTFS_POST_IMAGE_SCRIPT+ configuration option.
+Each of those scripts will be called, with the path to the +images+
+output directory as first and unique argument, and will be executed
+with the main Buildroot source directory as the current
+directory. Those scripts will be executed as the user that executes
+Buildroot, which should normally not be the root user. Therefore, any
+action requiring root permissions in one of these post-image script
+will require special handling (usage of fakeroot or sudo), which is
+left to the script developer.
+Just like for the _post-build scripts_ mentionned above, you also have
+access to the following environment variables from your _post-image

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