image_types.bbclass: manage 'cpio_append' directory
For cpio images, do_rootfs() can operate on a dirty '${WORKDIR}/cpio_append' directory which contains e.g. files from previous builds. This can cause unwanted files in the image or can break the build. E.g. when there is a cpio_append/init -> /sbin/init symlink symlink, the 'ln -sf' can fail due to SELinux restrictions: | $ ls -la cpio_append/init | lrwxrwxrwx. 1 ensc ensc 10 22. Jan 16:26 cpio_append/init -> /sbin/init | | $ strace ln -sf /sbin/init cpio_append/init | ... | stat("cpio_append/init", 0x7fffbb9ca310) = -1 EACCES (Permission denied) | exit_group(1) = ? Patch cleans up 'cpio_append' before executing the 'do_rootfs' task by adding it to 'cleandirs'. An alternative implementation (which avoids creation of this empty dir for non-cpio images) might remove it within IMAGE_CMD_cpio, but this might break builds where people rely on the existence of this directory (e.g. to add local files). (From OE-Core rev: 4db3cc2360289c062fa0df4678f2f2ef990f0c1a) Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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@ -68,10 +68,10 @@ IMAGE_CMD_squashfs-xz = "mksquashfs ${IMAGE_ROOTFS} ${DEPLOY_DIR_IMAGE}/${IMAGE_
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IMAGE_CMD_squashfs-lzo = "mksquashfs ${IMAGE_ROOTFS} ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.squashfs-lzo ${EXTRA_IMAGECMD} -noappend -comp lzo"
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IMAGE_CMD_tar = "tar -cvf ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.tar -C ${IMAGE_ROOTFS} ."
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do_rootfs[cleandirs] += "${WORKDIR}/cpio_append"
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IMAGE_CMD_cpio () {
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(cd ${IMAGE_ROOTFS} && find . | cpio -o -H newc >${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio)
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if [ ! -L ${IMAGE_ROOTFS}/init -a ! -e ${IMAGE_ROOTFS}/init ]; then
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mkdir -p ${WORKDIR}/cpio_append
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if [ -L ${IMAGE_ROOTFS}/sbin/init -o -e ${IMAGE_ROOTFS}/sbin/init ]; then
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ln -sf /sbin/init ${WORKDIR}/cpio_append/init
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else
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