aboutsummaryrefslogtreecommitdiffstats
path: root/meta/classes/rootfs-postcommands.bbclass
blob: 0c7ceea542a43af150a5d821f4f93a30120463a4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
# 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}
}