blob: 690fa976aae54a94cb8d39939f633145502ef9af [file] [log] [blame]
#
# Copyright OpenEmbedded Contributors
#
# SPDX-License-Identifier: MIT
#
# Zap the root password if debug-tweaks and empty-root-password features are not enabled
ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'empty-root-password' ], "", "zap_empty_root_password; ",d)}'
# Allow dropbear/openssh to accept logins from accounts with an empty password string if debug-tweaks or allow-empty-password is enabled
ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'allow-empty-password' ], "ssh_allow_empty_password; ", "",d)}'
# Allow dropbear/openssh to accept root logins if debug-tweaks or allow-root-login is enabled
ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'allow-root-login' ], "ssh_allow_root_login; ", "",d)}'
# Autologin the root user on the serial console, if empty-root-password and serial-autologin-root are active
ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_FEATURES", [ 'empty-root-password', 'serial-autologin-root' ], "serial_autologin_root; ", "",d)}'
# Enable postinst logging if debug-tweaks or post-install-logging is enabled
ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'post-install-logging' ], "postinst_enable_logging; ", "",d)}'
# Create /etc/timestamp during image construction to give a reasonably sane default time setting
ROOTFS_POSTPROCESS_COMMAND += "rootfs_update_timestamp; "
# Tweak files in /etc if read-only-rootfs is enabled
ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_FEATURES", "read-only-rootfs", "read_only_rootfs_hook; ", "",d)}'
# We also need to do the same for the kernel boot parameters,
# otherwise kernel or initramfs end up mounting the rootfs read/write
# (the default) if supported by the underlying storage.
#
# We do this with :append because the default value might get set later with ?=
# and we don't want to disable such a default that by setting a value here.
APPEND:append = '${@bb.utils.contains("IMAGE_FEATURES", "read-only-rootfs", " ro", "", d)}'
# Generates test data file with data store variables expanded in json format
ROOTFS_POSTPROCESS_COMMAND += "write_image_test_data; "
# Write manifest
IMAGE_MANIFEST = "${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.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_any("IMAGE_FEATURES", [ "x11-base", "weston" ], "graphical.target", "multi-user.target", d)}'
ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("DISTRO_FEATURES", "systemd", "set_systemd_default_target; systemd_create_users;", "", d)}'
ROOTFS_POSTPROCESS_COMMAND += 'empty_var_volatile;'
ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("DISTRO_FEATURES", "overlayfs", "overlayfs_qa_check; overlayfs_postprocess;", "", d)}'
inherit image-artifact-names
# 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 ??= " tidy_shadowutils_files; "
python () {
d.appendVar('ROOTFS_POSTPROCESS_COMMAND', '${SORT_PASSWD_POSTPROCESS_COMMAND}')
d.appendVar('ROOTFS_POSTPROCESS_COMMAND', 'rootfs_reproducible;')
}
systemd_create_users () {
for conffile in ${IMAGE_ROOTFS}/usr/lib/sysusers.d/*.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
eval groupadd --root ${IMAGE_ROOTFS} --system $group || true
eval useradd --root ${IMAGE_ROOTFS} --shell /sbin/nologin --system $name --no-user-group || true
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
if [ -f ${IMAGE_ROOTFS}/etc/fstab ]; then
sed -i -e '/^[#[:space:]]*\/dev\/root/{s/defaults/ro/;s/\([[:space:]]*[[:digit:]]\)\([[:space:]]*\)[[:digit:]]$/\1\20/}' ${IMAGE_ROOTFS}/etc/fstab
fi
# Tweak the "mount -o remount,rw /" command in busybox-inittab inittab
if [ -f ${IMAGE_ROOTFS}/etc/inittab ]; then
sed -i 's|/bin/mount -o remount,rw /|/bin/mount -o remount,ro /|' ${IMAGE_ROOTFS}/etc/inittab
fi
# 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 overlayfs-etc is used this is not done as /etc is treated as writable
# If stateless-rootfs is enabled this is always done as we don't want to save keys then
if ${@ 'true' if not bb.utils.contains('IMAGE_FEATURES', 'overlayfs-etc', True, False, d) or bb.utils.contains('IMAGE_FEATURES', 'stateless-rootfs', True, False, d) else 'false'}; then
if [ -d ${IMAGE_ROOTFS}/etc/ssh ]; then
if [ -e ${IMAGE_ROOTFS}/etc/ssh/ssh_host_rsa_key ]; then
echo "SYSCONFDIR=\${SYSCONFDIR:-/etc/ssh}" >> ${IMAGE_ROOTFS}/etc/default/ssh
echo "SSHD_OPTS=" >> ${IMAGE_ROOTFS}/etc/default/ssh
else
echo "SYSCONFDIR=\${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=/var/lib/dropbear" >> ${IMAGE_ROOTFS}/etc/default/dropbear
fi
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
if ${@bb.utils.contains("DISTRO_FEATURES", "systemd", "true", "false", d)}; then
# Create machine-id
# 20:12 < mezcalero> koen: you have three options: a) run systemd-machine-id-setup at install time, b) have / read-only and an empty file there (for stateless) and c) boot with / writable
touch ${IMAGE_ROOTFS}${sysconfdir}/machine-id
fi
}
#
# This function disallows empty root passwords
#
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 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:]]*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
for f in `find ${IMAGE_ROOTFS}${sysconfdir}/pam.d/* -type f -exec test -e {} \; -print`
do
sed -i 's/nullok_secure/nullok/' $f
done
fi
}
#
# allow dropbear/openssh to accept root logins
#
ssh_allow_root_login () {
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
fi
done
if [ -e ${IMAGE_ROOTFS}${sbindir}/dropbear ] ; then
if grep -q DROPBEAR_EXTRA_ARGS ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear 2>/dev/null ; then
sed -i '/^DROPBEAR_EXTRA_ARGS=/ s/-w//' ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear
sed -i '/^# Disallow root/d' ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear
fi
fi
}
#
# Autologin the 'root' user on the serial terminal,
# if empty-root-password' AND 'serial-autologin-root are enabled
#
serial_autologin_root () {
if ${@bb.utils.contains("DISTRO_FEATURES", "sysvinit", "true", "false", d)}; then
# add autologin option to util-linux getty only
sed -i 's/options="/&--autologin root /' \
"${IMAGE_ROOTFS}${base_bindir}/start_getty"
elif ${@bb.utils.contains("DISTRO_FEATURES", "systemd", "true", "false", d)}; then
if [ -e ${IMAGE_ROOTFS}${systemd_system_unitdir}/serial-getty@.service ]; then
sed -i '/^\s*ExecStart\b/ s/getty /&--autologin root /' \
"${IMAGE_ROOTFS}${systemd_system_unitdir}/serial-getty@.service"
fi
fi
}
python tidy_shadowutils_files () {
import rootfspostcommands
rootfspostcommands.tidy_shadowutils_files(d.expand('${IMAGE_ROOTFS}${sysconfdir}'))
}
python sort_passwd () {
"""
Deprecated in the favour of tidy_shadowutils_files.
"""
import rootfspostcommands
bb.warn('[sort_passwd] You are using a deprecated function for '
'SORT_PASSWD_POSTPROCESS_COMMAND. The default one is now called '
'"tidy_shadowutils_files".')
rootfspostcommands.tidy_shadowutils_files(d.expand('${IMAGE_ROOTFS}${sysconfdir}'))
}
#
# Enable postinst logging
#
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_system_unitdir}/${SYSTEMD_DEFAULT_TARGET} ]; then
ln -sf ${systemd_system_unitdir}/${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 $i zImage; done)
fi
}
python write_image_manifest () {
from oe.rootfs import image_list_installed_packages
from oe.utils import format_pkg_list
deploy_dir = d.getVar('IMGDEPLOYDIR')
link_name = d.getVar('IMAGE_LINK_NAME')
manifest_name = d.getVar('IMAGE_MANIFEST')
if not manifest_name:
return
pkgs = image_list_installed_packages(d)
with open(manifest_name, 'w+') as image_manifest:
image_manifest.write(format_pkg_list(pkgs, "ver"))
if os.path.exists(manifest_name) and link_name:
manifest_link = deploy_dir + "/" + link_name + ".manifest"
if manifest_link != manifest_name:
if os.path.lexists(manifest_link):
os.remove(manifest_link)
os.symlink(os.path.basename(manifest_name), manifest_link)
}
# Can be used to create /etc/timestamp during image construction to give a reasonably
# sane default time setting
rootfs_update_timestamp () {
if [ "${REPRODUCIBLE_TIMESTAMP_ROOTFS}" != "" ]; then
# Convert UTC into %4Y%2m%2d%2H%2M%2S
sformatted=`date -u -d @${REPRODUCIBLE_TIMESTAMP_ROOTFS} +%4Y%2m%2d%2H%2M%2S`
else
sformatted=`date -u +%4Y%2m%2d%2H%2M%2S`
fi
echo $sformatted > ${IMAGE_ROOTFS}/etc/timestamp
bbnote "rootfs_update_timestamp: set /etc/timestamp to $sformatted"
}
# 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 $schema
fi
done
}
rootfs_check_host_user_contaminated () {
contaminated="${S}/host-user-contaminated.txt"
HOST_USER_UID="$(PSEUDO_UNLOAD=1 id -u)"
HOST_USER_GID="$(PSEUDO_UNLOAD=1 id -g)"
find "${IMAGE_ROOTFS}" -path "${IMAGE_ROOTFS}/home" -prune -o \
-user "$HOST_USER_UID" -print -o -group "$HOST_USER_GID" -print >"$contaminated"
sed -e "s,${IMAGE_ROOTFS},," $contaminated | while read line; do
bbwarn "Path in the rootfs is owned by the same user or group as the user running bitbake:" $line `ls -lan ${IMAGE_ROOTFS}/$line`
done
if [ -s "$contaminated" ]; then
bbwarn "/etc/passwd:" `cat ${IMAGE_ROOTFS}/etc/passwd`
bbwarn "/etc/group:" `cat ${IMAGE_ROOTFS}/etc/group`
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
deploy_dir = d.getVar('IMGDEPLOYDIR')
link_name = d.getVar('IMAGE_LINK_NAME')
testdata_name = os.path.join(deploy_dir, "%s.testdata.json" % d.getVar('IMAGE_NAME'))
searchString = "%s/"%(d.getVar("TOPDIR")).replace("//","/")
export2json(d, testdata_name, searchString=searchString, replaceString="")
if os.path.exists(testdata_name) and link_name:
testdata_link = os.path.join(deploy_dir, "%s.testdata.json" % link_name)
if testdata_link != testdata_name:
if os.path.lexists(testdata_link):
os.remove(testdata_link)
os.symlink(os.path.basename(testdata_name), testdata_link)
}
write_image_test_data[vardepsexclude] += "TOPDIR"
# Check for unsatisfied recommendations (RRECOMMENDS)
python rootfs_log_check_recommends() {
log_path = d.expand("${T}/log.do_rootfs")
with open(log_path, 'r') as log:
for line in log:
if 'log_check' in line:
continue
if 'unsatisfied recommendation for' in line:
bb.warn('[log_check] %s: %s' % (d.getVar('PN'), line))
}
# Perform any additional adjustments needed to make rootf binary reproducible
rootfs_reproducible () {
if [ "${REPRODUCIBLE_TIMESTAMP_ROOTFS}" != "" ]; then
# Convert UTC into %4Y%2m%2d%2H%2M%2S
sformatted=`date -u -d @${REPRODUCIBLE_TIMESTAMP_ROOTFS} +%4Y%2m%2d%2H%2M%2S`
echo $sformatted > ${IMAGE_ROOTFS}/etc/version
bbnote "rootfs_reproducible: set /etc/version to $sformatted"
if [ -d ${IMAGE_ROOTFS}${sysconfdir}/gconf ]; then
find ${IMAGE_ROOTFS}${sysconfdir}/gconf -name '%gconf.xml' -print0 | xargs -0r \
sed -i -e 's@\bmtime="[0-9][0-9]*"@mtime="'${REPRODUCIBLE_TIMESTAMP_ROOTFS}'"@g'
fi
fi
}
# Perform a dumb check for unit existence, not its validity
python overlayfs_qa_check() {
from oe.overlayfs import mountUnitName
overlayMountPoints = d.getVarFlags("OVERLAYFS_MOUNT_POINT") or {}
imagepath = d.getVar("IMAGE_ROOTFS")
sysconfdir = d.getVar("sysconfdir")
searchpaths = [oe.path.join(imagepath, sysconfdir, "systemd", "system"),
oe.path.join(imagepath, d.getVar("systemd_system_unitdir"))]
fstabpath = oe.path.join(imagepath, sysconfdir, "fstab")
if not any(os.path.exists(path) for path in [*searchpaths, fstabpath]):
return
fstabDevices = []
if os.path.isfile(fstabpath):
with open(fstabpath, 'r') as f:
for line in f:
if line[0] == '#':
continue
path = line.split(maxsplit=2)
if len(path) > 2:
fstabDevices.append(path[1])
allUnitExist = True;
for mountPoint in overlayMountPoints:
qaSkip = (d.getVarFlag("OVERLAYFS_QA_SKIP", mountPoint) or "").split()
if "mount-configured" in qaSkip:
continue
mountPath = d.getVarFlag('OVERLAYFS_MOUNT_POINT', mountPoint)
if mountPath in fstabDevices:
continue
mountUnit = mountUnitName(mountPath)
if any(os.path.isfile(oe.path.join(dirpath, mountUnit))
for dirpath in searchpaths):
continue
bb.warn(f'Mount path {mountPath} not found in fstab and unit '
f'{mountUnit} not found in systemd unit directories.')
bb.warn(f'Skip this check by setting OVERLAYFS_QA_SKIP[{mountPoint}] = '
'"mount-configured"')
allUnitExist = False;
if not allUnitExist:
bb.fatal('Not all mount paths and units are installed in the image')
}
python overlayfs_postprocess() {
import shutil
# install helper script
helperScriptName = "overlayfs-create-dirs.sh"
helperScriptSource = oe.path.join(d.getVar("COREBASE"), "meta/files", helperScriptName)
helperScriptDest = oe.path.join(d.getVar("IMAGE_ROOTFS"), "/usr/sbin/", helperScriptName)
shutil.copyfile(helperScriptSource, helperScriptDest)
os.chmod(helperScriptDest, 0o755)
}