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
|
#! /bin/bash
# pbuilder user-mode-linux hack.
#
# pbuilder -- personal Debian package builder
# Copyright (C) 2001-2007 Junichi Uekawa
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
set -e
function cleanup_function () {
rm -f ${INSIDE_PBUILDER}
${EXTRACLEANUP}
}
. /usr/lib/pbuilder/pbuilder-loadconfig
OPERATION="$1"
shift;
. /usr/lib/pbuilder/pbuilder-uml-checkparams
function usecow () {
PBUILDER_COWFILENAME="${BUILDPLACE}/$$.cow"
PBUILDER_COW="${PBUILDER_COWFILENAME},"
if ! touch "${PBUILDER_COWFILENAME}"; then
echo "E: Cannot write-access to the COW file, check buildplace" >&2
exit 1;
fi
rm -f "${PBUILDER_COWFILENAME}"
}
function cleancow () {
# clean the cow file
rm -f "${PBUILDER_COWFILENAME}"
}
function operate_uml () {
# opeartes on UML, and runs pbuilder $1
# use this script file to bootstrap the pbuilder inside the UML
INSIDE_PBUILDER=$(tempfile)
trap cleanup_function exit sighup
UML_CHROOT_MOUNTPOINT=/var/cache/pbuilder/pbuilder-mnt
UML_CHROOT_BUILDRESULTMOUNTDIR=/var/cache/pbuilder/pbuilder-umlresult
#The following script is ran inside UML as soon as it is started.
cat <<EOF > ${INSIDE_PBUILDER}
#! /bin/bash
###
### BEGIN CODE EXECUTED INSIDE User-mode-linux
###
### note that ${VARIABLE}s are evaluated outside of user-mode-linux.
### while \${VARIABLE}s are evaluated inside of user-mode-linux.
${UML_DEBUGMODE}
mount -t proc /proc /proc
mount -t tmpfs /tmp /tmp
# create devices
mount -t tmpfs tmpfs /dev
mknod /dev/ubdb b 98 16
#if ! fsck -p /dev/ubdb; then
# echo "W: Failed to fsck /dev/ubdb"
#fi
if ! mount -t ext2 /dev/ubdb ${UML_CHROOT_MOUNTPOINT}; then
echo "E: Cannot mount /dev/ubdb, is UML root image accessible as current user?" >&2
exit 1
fi
mount --bind ${UML_CHROOT_MOUNTPOINT}/dev /dev
# mount /lib/modules on the hostfs
kernel_modules=\$(sed -ne 's\$.*/lib/modules.*hostfs.*defaults,ro,\([^[:space:]]*\).*\$\1\$p' ${UML_CHROOT_MOUNTPOINT}/etc/fstab)
if [ -n "\${kernel_modules}" ] ; then
echo " -> Mount /lib/modules on the host \${kernel_modules}"
mount -t hostfs -o ro,\${kernel_modules} hostfs /lib/modules
fi
export LOGNAME="${LOGNAME}"
export HOME="${HOME}"
hostname "${UML_HOSTNAME}"
if [ "${UML_MOUNT_TMPFS}" = "yes" ]; then
mount -t tmpfs ${UML_CHROOT_MOUNTPOINT}/tmp ${UML_CHROOT_MOUNTPOINT}/tmp
else
# clean up tmp before playing with it.
rm -rf ${UML_CHROOT_MOUNTPOINT}/tmp
mkdir ${UML_CHROOT_MOUNTPOINT}/tmp
chmod 1777 ${UML_CHROOT_MOUNTPOINT}/tmp
fi
if [ "${UML_IP}" != 'dhcp' ]; then
cat <<IP > ${UML_CHROOT_MOUNTPOINT}/etc/network/interfaces
auto lo
iface lo inet loopback
# The first network card - this entry was created during the Debian installation
auto eth0
iface eth0 inet static
address $UML_IP
netmask $UML_NETMASK
network $UML_NETWORK
broadcast $UML_BROADCAST
gateway $UML_GATEWAY
IP
fi
cat <<SHELL > ${UML_CHROOT_MOUNTPOINT}/tmp/chrootshell
#! /bin/bash
${UML_DEBUGMODE}
# the shell executed inside chroot inside UML
echo Starting network inside the chroot
mount -t proc /proc /proc
/etc/init.d/networking stop
/etc/init.d/networking start
umount /proc
SHELL
chmod a+x ${UML_CHROOT_MOUNTPOINT}/tmp/chrootshell
chroot ${UML_CHROOT_MOUNTPOINT} /tmp/chrootshell
#some variables need to be set from outside values, possibly
export PATH="$PATH"
export TMPDIR=/tmp
unset EXTRAOPT || true
declare -a EXTRAOPT
if [ -n "${UML_DISTRIBUTION}" ]; then
EXTRAOPT[0]="--distribution"
EXTRAOPT[1]="${UML_DISTRIBUTION}"
fi
if [ -z "${UML_BUILDRESULT}" ]; then
BUILDRESULT=
else
echo " -> Mount build result dir outside UML [${UML_BUILDRESULT}] as [${UML_CHROOT_BUILDRESULTMOUNTDIR}]"
BUILDRESULT=${UML_CHROOT_BUILDRESULTMOUNTDIR}
mkdir -p ${UML_CHROOT_BUILDRESULTMOUNTDIR} || true
mount -t hostfs none "${UML_CHROOT_BUILDRESULTMOUNTDIR}" -o "${UML_BUILDRESULT}"
fi
pbuilder "$1" ${UML_EXTRAOPT} \${EXTRAOPT[@]} --buildresult "\${BUILDRESULT}" --buildplace "${UML_CHROOT_MOUNTPOINT}" --internal-build-uml ${UML_DEBUGMODE:+--debug} ${BUILDING_DSC_FILE} ${UML_EXECUTE_EXTRAOPT}
echo \$? > /proc/exitcode
if [ -n "\${kernel_modules}" ] ; then
umount /lib/modules
fi
umount /dev
umount ${UML_CHROOT_MOUNTPOINT}
/sbin/halt -d -f
###
### END CODE EXECUTED INSIDE User-mode-linux
###
EOF
chmod a+x ${INSIDE_PBUILDER}
if [ $( id -u ) = 0 ]; then
echo "W: You are uid=0. Don't run UML as uid=0, it's not supported." >&2
fi
echo Invoking: "linux mem=${UML_MEM} eth0=${MY_ETH0} con0=fd:0,fd:1 con=pty root=/dev/root rootflags=/ rootfstype=hostfs ubd1=${PBUILDER_COW}${PBUILDER_UML_IMAGE} init=${INSIDE_PBUILDER} rw"
if linux mem=${UML_MEM} eth0=${MY_ETH0} con0=fd:0,fd:1 con=pty root=/dev/root rootflags=/ rootfstype=hostfs ubd1="${PBUILDER_COW}${PBUILDER_UML_IMAGE}" devfs=mount init=${INSIDE_PBUILDER} rw ; then
UML_EXITCODE=$?
echo " -> Successful exit from user-mode linux"
else
UML_EXITCODE=$?
echo " -> Exit code ${UML_EXITCODE}"
fi
}
BUILDING_DSC_FILE=$(readlink -f "$1") || true # ignore failure here
EXTRACLEANUP=
UML_EXITCODE=1
case "${OPERATION}" in
build)
usecow
EXTRACLEANUP=cleancow
operate_uml build
;;
update)
operate_uml update
;;
login)
if [ "${UML_LOGIN_NOCOW}" = "yes" ]; then
echo " -> Not using COW filesystem for login session, modifications to this session will persist"
else
usecow
EXTRACLEANUP=cleancow
fi
operate_uml login
;;
execute)
if [ "${UML_LOGIN_NOCOW}" = "yes" ]; then
echo " -> Not using COW filesystem for login session, modifications to this session will persist"
else
usecow
EXTRACLEANUP=cleancow
fi
shift;
UML_EXECUTE_EXTRAOPT="${UML_EXECUTE_EXTRAOPT} $@"
operate_uml execute
;;
dumpconfig)
echo " -> start dump outside of UML"
echo " -> set"
set;
echo " -> env"
env;
echo " -> end dump outside of UML"
usecow
EXTRACLEANUP=cleancow
operate_uml dumpconfig
;;
create)
if [ -n "${UML_DISTRIBUTION}" ]; then
if [ ! -d ~/.pbuilder-user-mode-linux ]; then
mkdir ~/.pbuilder-user-mode-linux
fi
sed "s/dist=.*/dist=${UML_DISTRIBUTION}/" /etc/rootstrap/rootstrap.conf > ~/.pbuilder-user-mode-linux/rootstrap.conf
if [ -f rootstrap.conf ]; then
sed "s/dist=.*/dist=${UML_DISTRIBUTION}/" rootstrap.conf > ~/.pbuilder-user-mode-linux/rootstrap.conf
fi
cd ~/.pbuilder-user-mode-linux
fi
rootstrap -s ${ROOTSTRAP_IMAGESIZE:=1000} ${PBUILDER_UML_IMAGE}
operate_uml update
;;
*)
echo "Error: Unknown option [${OPERATION}] was specified " >&2
;;
esac
exit ${UML_EXITCODE}
|