# Zap the root password if debug-tweaks feature is not enabled ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'empty-root-password' ], "", "zap_empty_root_password ; ",d)}' # Allow dropbear/openssh to accept logins from accounts with an empty password string if debug-tweaks is enabled ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'allow-empty-password' ], "ssh_allow_empty_password; ", "",d)}' # Enable postinst logging if debug-tweaks is enabled ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'post-install-logging' ], "postinst_enable_logging; ", "",d)}' # Create /etc/timestamp during image construction to give a reasonably sane default time setting ROOTFS_POSTPROCESS_COMMAND += "rootfs_update_timestamp ; " # Tweak the mount options for rootfs in /etc/fstab if read-only-rootfs is enabled ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_FEATURES", "read-only-rootfs", "read_only_rootfs_hook; ", "",d)}' # Generates test data file with data store variables expanded in json format ROOTFS_POSTPROCESS_COMMAND += "write_image_test_data ; " # Write manifest IMAGE_MANIFEST = "${IMGDEPLOYDIR}/${IMAGE_NAME}.rootfs.manifest" ROOTFS_POSTUNINSTALL_COMMAND =+ "write_image_manifest ; " # Set default postinst log file POSTINST_LOGFILE ?= "${localstatedir}/log/postinstall.log" # Set default target for systemd images SYSTEMD_DEFAULT_TARGET ?= '${@bb.utils.contains("IMAGE_FEATURES", "x11-base", "graphical.target", "multi-user.target", d)}' ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("DISTRO_FEATURES", "systemd", "set_systemd_default_target; systemd_create_users;", "", d)}' ROOTFS_POSTPROCESS_COMMAND += 'empty_var_volatile;' # Disable DNS lookups, the SSH_DISABLE_DNS_LOOKUP can be overridden to allow # distros to choose not to take this change SSH_DISABLE_DNS_LOOKUP ?= " ssh_disable_dns_lookup ; " ROOTFS_POSTPROCESS_COMMAND_append_qemuall = "${SSH_DISABLE_DNS_LOOKUP}" # Sort the user and group entries in /etc by ID in order to make the content # deterministic. Package installs are not deterministic, causing the ordering # of entries to change between builds. In case that this isn't desired, # the command can be overridden. # # Note that useradd-staticids.bbclass has to be used to ensure that # the numeric IDs of dynamically created entries remain stable. # # We want this to run as late as possible, in particular after # systemd_sysusers_create and set_user_group. Using _append is not # enough for that, set_user_group is added that way and would end # up running after us. SORT_PASSWD_POSTPROCESS_COMMAND ??= " sort_passwd; " python () { d.appendVar('ROOTFS_POSTPROCESS_COMMAND', '${SORT_PASSWD_POSTPROCESS_COMMAND}') } systemd_create_users () { for conffile in ${IMAGE_ROOTFS}/usr/lib/sysusers.d/systemd.conf ${IMAGE_ROOTFS}/usr/lib/sysusers.d/systemd-remote.conf; do [ -e $conffile ] || continue grep -v "^#" $conffile | sed -e '/^$/d' | while read type name id comment; do if [ "$type" = "u" ]; then useradd_params="--shell /sbin/nologin" [ "$id" != "-" ] && useradd_params="$useradd_params --uid $id" [ "$comment" != "-" ] && useradd_params="$useradd_params --comment $comment" useradd_params="$useradd_params --system $name" eval useradd --root ${IMAGE_ROOTFS} $useradd_params || true elif [ "$type" = "g" ]; then groupadd_params="" [ "$id" != "-" ] && groupadd_params="$groupadd_params --gid $id" groupadd_params="$groupadd_params --system $name" eval groupadd --root ${IMAGE_ROOTFS} $groupadd_params || true elif [ "$type" = "m" ]; then group=$id if [ ! `grep -q "^${group}:" ${IMAGE_ROOTFS}${sysconfdir}/group` ]; then eval groupadd --root ${IMAGE_ROOTFS} --system $group fi if [ ! `grep -q "^${name}:" ${IMAGE_ROOTFS}${sysconfdir}/passwd` ]; then eval useradd --root ${IMAGE_ROOTFS} --shell /sbin/nologin --system $name fi eval usermod --root ${IMAGE_ROOTFS} -a -G $group $name fi done done } # # A hook function to support read-only-rootfs IMAGE_FEATURES # read_only_rootfs_hook () { # Tweak the mount option and fs_passno for rootfs in fstab sed -i -e '/^[#[:space:]]*\/dev\/root/{s/defaults/ro/;s/\([[:space:]]*[[:digit:]]\)\([[:space:]]*\)[[:digit:]]$/\1\20/}' ${IMAGE_ROOTFS}/etc/fstab # If we're using openssh and the /etc/ssh directory has no pre-generated keys, # we should configure openssh to use the configuration file /etc/ssh/sshd_config_readonly # and the keys under /var/run/ssh. if [ -d ${IMAGE_ROOTFS}/etc/ssh ]; then if [ -e ${IMAGE_ROOTFS}/etc/ssh/ssh_host_rsa_key ]; then echo "SYSCONFDIR=/etc/ssh" >> ${IMAGE_ROOTFS}/etc/default/ssh echo "SSHD_OPTS=" >> ${IMAGE_ROOTFS}/etc/default/ssh else echo "SYSCONFDIR=/var/run/ssh" >> ${IMAGE_ROOTFS}/etc/default/ssh echo "SSHD_OPTS='-f /etc/ssh/sshd_config_readonly'" >> ${IMAGE_ROOTFS}/etc/default/ssh fi fi # Also tweak the key location for dropbear in the same way. if [ -d ${IMAGE_ROOTFS}/etc/dropbear ]; then if [ -e ${IMAGE_ROOTFS}/etc/dropbear/dropbear_rsa_host_key ]; then echo "DROPBEAR_RSAKEY_DIR=/etc/dropbear" >> ${IMAGE_ROOTFS}/etc/default/dropbear else echo "DROPBEAR_RSAKEY_DIR=/var/lib/dropbear" >> ${IMAGE_ROOTFS}/etc/default/dropbear fi fi if ${@bb.utils.contains("DISTRO_FEATURES", "sysvinit", "true", "false", d)}; then # Change the value of ROOTFS_READ_ONLY in /etc/default/rcS to yes if [ -e ${IMAGE_ROOTFS}/etc/default/rcS ]; then sed -i 's/ROOTFS_READ_ONLY=no/ROOTFS_READ_ONLY=yes/' ${IMAGE_ROOTFS}/etc/default/rcS fi # Run populate-volatile.sh at rootfs time to set up basic files # and directories to support read-only rootfs. if [ -x ${IMAGE_ROOTFS}/etc/init.d/populate-volatile.sh ]; then ${IMAGE_ROOTFS}/etc/init.d/populate-volatile.sh fi fi } # # This function is intended to disallow empty root password if 'debug-tweaks' is not in IMAGE_FEATURES. # zap_empty_root_password () { if [ -e ${IMAGE_ROOTFS}/etc/shadow ]; then sed -i 's%^root::%root:*:%' ${IMAGE_ROOTFS}/etc/shadow fi if [ -e ${IMAGE_ROOTFS}/etc/passwd ]; then sed -i 's%^root::%root:*:%' ${IMAGE_ROOTFS}/etc/passwd fi } # # allow dropbear/openssh to accept root logins and logins from accounts with an empty password string # ssh_allow_empty_password () { for config in sshd_config sshd_config_readonly; do if [ -e ${IMAGE_ROOTFS}${sysconfdir}/ssh/$config ]; then sed -i 's/^[#[:space:]]*PermitRootLogin.*/PermitRootLogin yes/' ${IMAGE_ROOTFS}${sysconfdir}/ssh/$config sed -i 's/^[#[:space:]]*PermitEmptyPasswords.*/PermitEmptyPasswords yes/' ${IMAGE_ROOTFS}${sysconfdir}/ssh/$config fi done if [ -e ${IMAGE_ROOTFS}${sbindir}/dropbear ] ; then if grep -q DROPBEAR_EXTRA_ARGS ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear 2>/dev/null ; then if ! grep -q "DROPBEAR_EXTRA_ARGS=.*-B" ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear ; then sed -i 's/^DROPBEAR_EXTRA_ARGS="*\([^"]*\)"*/DROPBEAR_EXTRA_ARGS="\1 -B"/' ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear fi else printf '\nDROPBEAR_EXTRA_ARGS="-B"\n' >> ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear fi fi if [ -d ${IMAGE_ROOTFS}${sysconfdir}/pam.d ] ; then sed -i 's/nullok_secure/nullok/' ${IMAGE_ROOTFS}${sysconfdir}/pam.d/* fi } ssh_disable_dns_lookup () { if [ -e ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config ]; then sed -i -e 's:#UseDNS yes:UseDNS no:' ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config fi } python sort_passwd () { import rootfspostcommands rootfspostcommands.sort_passwd(d.expand('${IMAGE_ROOTFS}${sysconfdir}')) } # # Enable postinst logging if debug-tweaks is enabled # postinst_enable_logging () { mkdir -p ${IMAGE_ROOTFS}${sysconfdir}/default echo "POSTINST_LOGGING=1" >> ${IMAGE_ROOTFS}${sysconfdir}/default/postinst echo "LOGFILE=${POSTINST_LOGFILE}" >> ${IMAGE_ROOTFS}${sysconfdir}/default/postinst } # # Modify systemd default target # set_systemd_default_target () { if [ -d ${IMAGE_ROOTFS}${sysconfdir}/systemd/system -a -e ${IMAGE_ROOTFS}${systemd_unitdir}/system/${SYSTEMD_DEFAULT_TARGET} ]; then ln -sf ${systemd_unitdir}/system/${SYSTEMD_DEFAULT_TARGET} ${IMAGE_ROOTFS}${sysconfdir}/systemd/system/default.target fi } # If /var/volatile is not empty, we have seen problems where programs such as the # journal make assumptions based on the contents of /var/volatile. The journal # would then write to /var/volatile before it was mounted, thus hiding the # items previously written. # # This change is to attempt to fix those types of issues in a way that doesn't # affect users that may not be using /var/volatile. empty_var_volatile () { if [ -e ${IMAGE_ROOTFS}/etc/fstab ]; then match=`awk '$1 !~ "#" && $2 ~ /\/var\/volatile/{print $2}' ${IMAGE_ROOTFS}/etc/fstab 2> /dev/null` if [ -n "$match" ]; then find ${IMAGE_ROOTFS}/var/volatile -mindepth 1 -delete fi fi } # Turn any symbolic /sbin/init link into a file remove_init_link () { if [ -h ${IMAGE_ROOTFS}/sbin/init ]; then LINKFILE=${IMAGE_ROOTFS}`readlink ${IMAGE_ROOTFS}/sbin/init` rm ${IMAGE_ROOTFS}/sbin/init cp $LINKFILE ${IMAGE_ROOTFS}/sbin/init fi } make_zimage_symlink_relative () { if [ -L ${IMAGE_ROOTFS}/boot/zImage ]; then (cd ${IMAGE_ROOTFS}/boot/ && for i in `ls zImage-* | sort`; do ln -sf $i zImage; done) fi } python write_image_manifest () { from oe.rootfs import image_list_installed_packages from oe.utils import format_pkg_list deploy_dir = d.getVar('IMGDEPLOYDIR') link_name = d.getVar('IMAGE_LINK_NAME') manifest_name = d.getVar('IMAGE_MANIFEST') if not manifest_name: return pkgs = image_list_installed_packages(d) with open(manifest_name, 'w+') as image_manifest: image_manifest.write(format_pkg_list(pkgs, "ver")) image_manifest.write("\n") if os.path.exists(manifest_name): manifest_link = deploy_dir + "/" + link_name + ".manifest" if os.path.lexists(manifest_link): os.remove(manifest_link) os.symlink(os.path.basename(manifest_name), manifest_link) } # Can be use to create /etc/timestamp during image construction to give a reasonably # sane default time setting rootfs_update_timestamp () { date -u +%4Y%2m%2d%2H%2M%2S >${IMAGE_ROOTFS}/etc/timestamp } # Prevent X from being started rootfs_no_x_startup () { if [ -f ${IMAGE_ROOTFS}/etc/init.d/xserver-nodm ]; then chmod a-x ${IMAGE_ROOTFS}/etc/init.d/xserver-nodm fi } rootfs_trim_schemas () { for schema in ${IMAGE_ROOTFS}/etc/gconf/schemas/*.schemas do # Need this in case no files exist if [ -e $schema ]; then oe-trim-schemas $schema > $schema.new mv $schema.new $schema fi done } rootfs_check_host_user_contaminated () { contaminated="${WORKDIR}/host-user-contaminated.txt" HOST_USER_UID="$(PSEUDO_UNLOAD=1 id -u)" HOST_USER_GID="$(PSEUDO_UNLOAD=1 id -g)" find "${IMAGE_ROOTFS}" -wholename "${IMAGE_ROOTFS}/home" -prune \ -user "$HOST_USER_UID" -o -group "$HOST_USER_GID" >"$contaminated" if [ -s "$contaminated" ]; then echo "WARNING: Paths in the rootfs are owned by the same user or group as the user running bitbake. See the logfile for the specific paths." cat "$contaminated" | sed "s,^, ," fi } # Make any absolute links in a sysroot relative rootfs_sysroot_relativelinks () { sysroot-relativelinks.py ${SDK_OUTPUT}/${SDKTARGETSYSROOT} } # Generated test data json file python write_image_test_data() { from oe.data import export2json testdata = "%s/%s.testdata.json" % (d.getVar('DEPLOY_DIR_IMAGE'), d.getVar('IMAGE_NAME')) testdata_link = "%s/%s.testdata.json" % (d.getVar('DEPLOY_DIR_IMAGE'), d.getVar('IMAGE_LINK_NAME')) bb.utils.mkdirhier(os.path.dirname(testdata)) export2json(d, testdata) if os.path.lexists(testdata_link): os.remove(testdata_link) os.symlink(os.path.basename(testdata), testdata_link) }