# This class installs additional files found on the build host # directly into the rootfs. # # One use case is to install a constant ssh host key in # an image that gets created for just one machine. This # solves two issues: # - host key generation on the device can stall when the # kernel has not gathered enough entropy yet (seen in practice # under qemu) # - ssh complains by default when the host key changes # # For dropbear, with the ssh host key store along side the local.conf: # 1. Extend local.conf: # INHERIT += "rootfsdebugfiles" # ROOTFS_DEBUG_FILES += "${TOPDIR}/conf/dropbear_rsa_host_key ${IMAGE_ROOTFS}/etc/dropbear/dropbear_rsa_host_key ;" # 2. Boot the image once, copy the dropbear_rsa_host_key from # the device into your build conf directory. # # Do not use for production images! It bypasses several # core build mechanisms (updating the image when one # of the files changes, license tracking in the image # manifest, ...). ROOTFS_DEBUG_FILES ?= "" ROOTFS_DEBUG_FILES[doc] = "Lists additional files or directories to be installed with 'cp -a' in the format 'source1 target1;source2 target2;...'" ROOTFS_POSTPROCESS_COMMAND += "rootfs_debug_files ;" rootfs_debug_files () { #!/bin/sh -e echo "${ROOTFS_DEBUG_FILES}" | sed -e 's/;/\n/g' | while read source target; do if [ -e "$source" ]; then mkdir -p $(dirname $target) cp -a $source $target fi done }