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# 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)}'
# 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}"
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
}
#
# 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 $i zImage; done)
fi
}
insert_feed_uris () {
echo "Building feeds for [${DISTRO}].."
for line in ${FEED_URIS}
do
# strip leading and trailing spaces/tabs, then split into name and uri
line_clean="`echo "$line"|sed 's/^[ \t]*//;s/[ \t]*$//'`"
feed_name="`echo "$line_clean" | sed -n 's/\(.*\)##\(.*\)/\1/p'`"
feed_uri="`echo "$line_clean" | sed -n 's/\(.*\)##\(.*\)/\2/p'`"
echo "Added $feed_name feed with URL $feed_uri"
# insert new feed-sources
echo "src/gz $feed_name $feed_uri" >> ${IMAGE_ROOTFS}/etc/opkg/${feed_name}-feed.conf
done
}
python write_image_manifest () {
from oe.rootfs import image_list_installed_packages
from oe.utils import format_pkg_list
deploy_dir = d.getVar('IMGDEPLOYDIR', True)
link_name = d.getVar('IMAGE_LINK_NAME', True)
manifest_name = d.getVar('IMAGE_MANIFEST', True)
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}
}
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