trunk/lxc/lxc-magellan.sh

#!/bin/bash

#
# lxc: linux Container library

# Authors:
# Niels Rogalla <niro@magellan-linux.de>

# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.

# This library 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
# Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

die() { echo "ERROR: $@"; exit 1; }

configure_magellan()
{
	local rootfs="$1"
	local hostname="$2"

	echo "Setting up rootfs..."

	# fix locales first
	if [[ -z ${LANG} ]] && [[ -z ${LC_ALL} ]]
	then
		sed -i "s:^#\(en_US..*\):\1:g" ${rootfs}/etc/locale.gen
		LC_ALL=C chroot ${rootfs} /usr/sbin/locale-gen
	elif [[ ! -z ${LANG} ]]
	then
		sed -i "s:^#\(${LANG}\):\1:g" ${rootfs}/etc/locale.gen
		echo "LANG=${LANG}" > ${rootfs}/etc/env.d/01locale
		LC_ALL=C chroot ${rootfs} /usr/sbin/locale-gen
		LC_ALL=C chroot ${rootfs} /sbin/env-rebuild
	elif [[ ! -z ${LC_ALL} ]]
	then
		sed -i "s:^#\(${LC_ALL}\):\1:g" ${rootfs}/etc/locale.gen
		echo "LC_ALL=${LC_ALL}" > ${rootfs}/etc/env.d/01locale
		LC_ALL=C chroot ${rootfs} /usr/sbin/locale-gen
		LC_ALL=C chroot ${rootfs} /sbin/env-rebuild
	fi

	# configure the inittab
	cat <<EOF > ${rootfs}/etc/inittab
id:3:initdefault:
si::sysinit:/etc/rc.d/init.d/rc sysinit
l0:0:wait:/etc/rc.d/init.d/rc 0
l1:S1:wait:/etc/rc.d/init.d/rc 1
l2:2:wait:/etc/rc.d/init.d/rc 2
l3:3:wait:/etc/rc.d/init.d/rc 3
l4:4:wait:/etc/rc.d/init.d/rc 4
l5:5:wait:/etc/rc.d/init.d/rc 5
l6:6:wait:/etc/rc.d/init.d/rc 6
su:S016:once:/sbin/sulogin
1:2345:respawn:/sbin/agetty console 38400
2:2345:respawn:/sbin/agetty tty2 38400 linux
3:2345:respawn:/sbin/agetty tty3 38400 linux
4:2345:respawn:/sbin/agetty tty4 38400 linux
5:2345:respawn:/sbin/agetty tty5 38400 linux
6:2345:respawn:/sbin/agetty tty6 38400 linux
x:a:once:/etc/X11/startxdm
EOF

	# configure the network using dhcp
	cat <<EOF > ${rootfs}/etc/conf.d/net.eth0
ONBOOT="yes"
NETWORKING="dhcp"
EOF

	# set the hostname
	cat <<EOF > ${rootfs}/etc/hostname
${hostname}
EOF

	# remove /, /boot, swap from fstab (\s = space)
	sed -i -e '/\s\/\s/d' -e '/\s\/boot\s/d' -e '/\sswap\s/d' ${rootfs}/etc/fstab

	# remove pointless services in a container
	chroot ${rootfs} /sbin/rc-config del checkfs
	chroot ${rootfs} /sbin/rc-config del setclock

	#echo "root:foobar" | chroot ${rootfs} chpasswd
	chroot ${rootfs} usermod -p $(openssl passwd -1 foobar) root
	echo "Root password is 'foobar', please change!"

	# create missing device nodes
	[[ ! -e ${rootfs}/dev/null ]] && mknod -m 666 ${rootfs}/dev/null c 1 3
	[[ ! -e ${rootfs}/dev/zero ]] && mknod -m 666 ${rootfs}/dev/zero c 1 5
	[[ ! -e ${rootfs}/dev/random ]] && mknod -m 666 ${rootfs}/dev/random c 1 8
	[[ ! -e ${rootfs}/dev/urandom ]] && mknod -m 666 ${rootfs}/dev/urandom c 1 9
	[[ ! -e ${rootfs}/dev/pts ]] && mkdir -m 755 ${rootfs}/dev/pts
	[[ ! -e ${rootfs}/dev/shm ]] && mkdir -m 1777 ${rootfs}/dev/shm
	[[ ! -e ${rootfs}/dev/tty ]] && mknod -m 666 ${rootfs}/dev/tty c 5 0
	[[ ! -e ${rootfs}/dev/console ]] && mknod -m 600 ${rootfs}/dev/console c 5 1
	[[ ! -e ${rootfs}/dev/tty0 ]] && mknod -m 666 ${rootfs}/dev/tty0 c 4 0
	[[ ! -e ${rootfs}/dev/tty1 ]] && mknod -m 666 ${rootfs}/dev/tty1 c 4 1
	[[ ! -e ${rootfs}/dev/tty2 ]] && mknod -m 666 ${rootfs}/dev/tty2 c 4 2
	[[ ! -e ${rootfs}/dev/tty3 ]] && mknod -m 666 ${rootfs}/dev/tty3 c 4 3
	[[ ! -e ${rootfs}/dev/tty4 ]] && mknod -m 666 ${rootfs}/dev/tty4 c 4 4
	[[ ! -e ${rootfs}/dev/tty5 ]] && mknod -m 666 ${rootfs}/dev/tty5 c 4 5
	[[ ! -e ${rootfs}/dev/tty6 ]] && mknod -m 666 ${rootfs}/dev/tty6 c 4 6
	[[ ! -e ${rootfs}/dev/full ]] && mknod -m 666 ${rootfs}/dev/full c 1 7
	[[ ! -e ${rootfs}/dev/initctl ]] && mknod -m 600 ${rootfs}/dev/initctl p
	[[ ! -e ${rootfs}/dev/ptmx ]] && mknod -m 666 ${rootfs}/dev/ptmx c 5 2

	return 0
}

download_magellan()
{
	local cache="$1"
	local arch="$2"
	local distribution="unstable"
	local mageprofile="$(basename $(readlink /etc/mage-profile))"
	local extrapackages="dialog iproute2 openssh"

	# check the mini magellan was not already downloaded
	mkdir -p "${cache}/partial-${arch}"
	if [ $? -ne 0 ]
	then
		echo "Failed to create '${cache}/partial-${arch}' directory"
		return 1
	fi

	# setup magerc
	cat <<EOF > ${cache}/partial-${arch}/mage.rc.bootstrap
ARCH="${arch}"
MAGE_DISTRIBUTION="${distribution}"

MAGEDIR="/usr/mage"
PKGDIR="/var/cache/mage/packages"
BUILDDIR="/var/tmp/magebuild"
INSTALLDB="/var/db/mage"
VIRTUALDB_DEFAULTS="/etc/mage-profile/virtuals.defaults"
VIRTUALDB_FILE="\${INSTALLDB}/virtuals"

VERBOSE="off"
MAGEDEBUG="off"

MIRRORS="http://magellan-linux.de/magellan/magellan-dev/svn/\${MAGE_DISTRIBUTION}"
RSYNC="rsync://magellan-linux.de/mage-svn"

PACKAGES_SERVER_PATH="packages/\${ARCH}"
MAGE_UNINSTALL_TIMEOUT=0
EOF

	# download a mini magellan into a cache
	echo "Downloading magellan minimal ..."
	mage-bootstrap --profile ${mageprofile} --root ${cache}/partial-${arch} --magerc ${cache}/partial-${arch}/mage.rc.bootstrap --update-tarball
	if [ $? -ne 0 ]
	then
		echo "Failed to download the rootfs, aborting."
		return 1
	fi

	# install extra packages
	for pkg in ${extrapackages}
	do
		MROOT=${cache}/partial-${arch} mage install ${pkg}
		if [ $? -ne 0 ]
		then
			echo "Failed to install package ${pkg}, aborting."
			return 1
		fi
	done

	mv "${cache}/partial-${arch}" "${cache}/rootfs-${arch}"
	echo "Download complete."

	return 0
}

copy_magellan()
{
	local cache="$1"
	local arch="$2"
	local rootfs="$3"

	# make a local copy of the minimagellan
	echo "Copying rootfs to ${rootfs}..."
	cp -a ${cache}/rootfs-${arch} ${rootfs} || return 1
	return 0
}

install_magellan()
{
	local cache="/var/cache/lxc/magellan"
	local rootfs="$1"

	mkdir -p /var/lock/subsys/
	(
		flock -n -x 200
		if [ $? -ne 0 ]
		then
			echo "Cache repository is busy."
			return 1
		fi

		arch=$(uname -m)
		echo "Checking cache download in ${cache}/rootfs-${arch} ... "
		if [ ! -e "${cache}/rootfs-${arch}" ]
		then
			download_magellan "${cache}" "${arch}"
			if [ $? -ne 0 ]
			then
				echo "Failed to download 'magellan base'"
				return 1
			fi
		fi

		install -d $(dirname ${rootfs})
		copy_magellan "${cache}" "${arch}" "${rootfs}"
		if [ $? -ne 0 ]; then
			echo "Failed to copy rootfs"
			return 1
		fi

		return 0

	) 200>/var/lock/subsys/lxc

	return $?
}

copy_configuration()
{
	local path="$1"
	local rootfs="$2"
	local name="$3"

	cat <<EOF >> ${path}/config
lxc.tty = 4
lxc.pts = 1024
lxc.rootfs = ${rootfs}
lxc.cgroup.devices.deny = a
# /dev/null and zero
lxc.cgroup.devices.allow = c 1:3 rwm
lxc.cgroup.devices.allow = c 1:5 rwm
# consoles
lxc.cgroup.devices.allow = c 5:1 rwm
lxc.cgroup.devices.allow = c 5:0 rwm
lxc.cgroup.devices.allow = c 4:0 rwm
lxc.cgroup.devices.allow = c 4:1 rwm
# /dev/{,u}random
lxc.cgroup.devices.allow = c 1:9 rwm
lxc.cgroup.devices.allow = c 1:8 rwm
lxc.cgroup.devices.allow = c 136:* rwm
lxc.cgroup.devices.allow = c 5:2 rwm
# rtc
lxc.cgroup.devices.allow = c 254:0 rwm

# mounts point
lxc.mount.entry=proc ${rootfs}/proc proc nodev,noexec,nosuid 0 0
lxc.mount.entry=devpts ${rootfs}/dev/pts devpts defaults 0 0
lxc.mount.entry=sysfs ${rootfs}/sys sysfs defaults  0 0
EOF

	if [ $? -ne 0 ]
	then
		echo "Failed to add configuration"
		return 1
	fi

	return 0
}

clean()
{
	local cache="/var/cache/lxc/magellan"

	if [ ! -e ${cache} ]
	then
		exit 0
	fi

	# lock, so we won't purge while someone is creating a repository
	(
		flock -n -x 200
		if [ $? != 0 ]; then
			echo "Cache repository is busy."
			exit 1
		fi

		echo -n "Purging the download cache..."
		rm --preserve-root --one-file-system -rf ${cache} && echo "Done." || exit 1
		exit 0
	) 200>/var/lock/subsys/lxc
}

usage()
{
	cat <<EOF
$1 -h|--help -p|--path=<path> --clean
EOF
	return 0
}

options=$(getopt -o hp:n:c -l help,path:,name:,clean -- "$@")
if [ $? -ne 0 ]
then
	usage $(basename $0)
	exit 1
fi
eval set -- "${options}"

while true
do
	case "$1" in
		-h|--help)	usage $0 && exit 0;;
		-p|--path)	path=$2; shift 2;;
		-n|--name)	name=$2; shift 2;;
		-c|--clean)	clean=$2; shift 2;;
		--)		shift 1; break ;;
		*)		break ;;
	esac
done

if [ ! -z "${clean}" -a -z "${path}" ]
then
	clean || exit 1
	exit 0
fi

# sanity checks
[ "$(id -u)" != "0" ] && die "This script should be run as 'root'"
type mage-bootstrap || die "'mage-bootstrap' command is missing"
[ -z "${path}" ] && die "'path' parameter is required"

rootfs=${path}/rootfs

install_magellan ${rootfs} || die "failed to install magellan"
configure_magellan ${rootfs} ${name} || die "failed to configure debian for a container"
copy_configuration ${path} ${rootfs} || die "failed write configuration file"

if [ ! -z ${clean} ]
then
	clean || exit 1
	exit 0
fi
1	niro	1057	#!/bin/bash
2
3			#
4			# lxc: linux Container library
5
6			# Authors:
7			# Niels Rogalla <niro@magellan-linux.de>
8
9			# This library is free software; you can redistribute it and/or
10			# modify it under the terms of the GNU Lesser General Public
11			# License as published by the Free Software Foundation; either
12			# version 2.1 of the License, or (at your option) any later version.
13
14			# This library is distributed in the hope that it will be useful,
15			# but WITHOUT ANY WARRANTY; without even the implied warranty of
16			# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17			# Lesser General Public License for more details.
18
19			# You should have received a copy of the GNU Lesser General Public
20			# License along with this library; if not, write to the Free Software
21			# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22
23			die() { echo "ERROR: $@"; exit 1; }
24
25			configure_magellan()
26			{
27			local rootfs="$1"
28			local hostname="$2"
29
30			echo "Setting up rootfs..."
31
32			# fix locales first
33			if [[ -z ${LANG} ]] && [[ -z ${LC_ALL} ]]
34			then
35			sed -i "s:^#\(en_US..*\):\1:g" ${rootfs}/etc/locale.gen
36			LC_ALL=C chroot ${rootfs} /usr/sbin/locale-gen
37			elif [[ ! -z ${LANG} ]]
38			then
39			sed -i "s:^#\(${LANG}\):\1:g" ${rootfs}/etc/locale.gen
40			echo "LANG=${LANG}" > ${rootfs}/etc/env.d/01locale
41			LC_ALL=C chroot ${rootfs} /usr/sbin/locale-gen
42			LC_ALL=C chroot ${rootfs} /sbin/env-rebuild
43			elif [[ ! -z ${LC_ALL} ]]
44			then
45			sed -i "s:^#\(${LC_ALL}\):\1:g" ${rootfs}/etc/locale.gen
46			echo "LC_ALL=${LC_ALL}" > ${rootfs}/etc/env.d/01locale
47			LC_ALL=C chroot ${rootfs} /usr/sbin/locale-gen
48			LC_ALL=C chroot ${rootfs} /sbin/env-rebuild
49			fi
50
51			# configure the inittab
52			cat <<EOF > ${rootfs}/etc/inittab
53			id:3:initdefault:
54			si::sysinit:/etc/rc.d/init.d/rc sysinit
55			l0:0:wait:/etc/rc.d/init.d/rc 0
56			l1:S1:wait:/etc/rc.d/init.d/rc 1
57			l2:2:wait:/etc/rc.d/init.d/rc 2
58			l3:3:wait:/etc/rc.d/init.d/rc 3
59			l4:4:wait:/etc/rc.d/init.d/rc 4
60			l5:5:wait:/etc/rc.d/init.d/rc 5
61			l6:6:wait:/etc/rc.d/init.d/rc 6
62			su:S016:once:/sbin/sulogin
63			1:2345:respawn:/sbin/agetty console 38400
64			2:2345:respawn:/sbin/agetty tty2 38400 linux
65			3:2345:respawn:/sbin/agetty tty3 38400 linux
66			4:2345:respawn:/sbin/agetty tty4 38400 linux
67			5:2345:respawn:/sbin/agetty tty5 38400 linux
68			6:2345:respawn:/sbin/agetty tty6 38400 linux
69			x:a:once:/etc/X11/startxdm
70			EOF
71
72			# configure the network using dhcp
73			cat <<EOF > ${rootfs}/etc/conf.d/net.eth0
74			ONBOOT="yes"
75			NETWORKING="dhcp"
76			EOF
77
78			# set the hostname
79			cat <<EOF > ${rootfs}/etc/hostname
80			${hostname}
81			EOF
82
83			# remove /, /boot, swap from fstab (\s = space)
84			sed -i -e '/\s\/\s/d' -e '/\s\/boot\s/d' -e '/\sswap\s/d' ${rootfs}/etc/fstab
85
86			# remove pointless services in a container
87			chroot ${rootfs} /sbin/rc-config del checkfs
88			chroot ${rootfs} /sbin/rc-config del setclock
89
90			#echo "root:foobar" \| chroot ${rootfs} chpasswd
91			chroot ${rootfs} usermod -p $(openssl passwd -1 foobar) root
92			echo "Root password is 'foobar', please change!"
93
94			# create missing device nodes
95			[[ ! -e ${rootfs}/dev/null ]] && mknod -m 666 ${rootfs}/dev/null c 1 3
96			[[ ! -e ${rootfs}/dev/zero ]] && mknod -m 666 ${rootfs}/dev/zero c 1 5
97			[[ ! -e ${rootfs}/dev/random ]] && mknod -m 666 ${rootfs}/dev/random c 1 8
98			[[ ! -e ${rootfs}/dev/urandom ]] && mknod -m 666 ${rootfs}/dev/urandom c 1 9
99			[[ ! -e ${rootfs}/dev/pts ]] && mkdir -m 755 ${rootfs}/dev/pts
100			[[ ! -e ${rootfs}/dev/shm ]] && mkdir -m 1777 ${rootfs}/dev/shm
101			[[ ! -e ${rootfs}/dev/tty ]] && mknod -m 666 ${rootfs}/dev/tty c 5 0
102			[[ ! -e ${rootfs}/dev/console ]] && mknod -m 600 ${rootfs}/dev/console c 5 1
103			[[ ! -e ${rootfs}/dev/tty0 ]] && mknod -m 666 ${rootfs}/dev/tty0 c 4 0
104			[[ ! -e ${rootfs}/dev/tty1 ]] && mknod -m 666 ${rootfs}/dev/tty1 c 4 1
105			[[ ! -e ${rootfs}/dev/tty2 ]] && mknod -m 666 ${rootfs}/dev/tty2 c 4 2
106			[[ ! -e ${rootfs}/dev/tty3 ]] && mknod -m 666 ${rootfs}/dev/tty3 c 4 3
107			[[ ! -e ${rootfs}/dev/tty4 ]] && mknod -m 666 ${rootfs}/dev/tty4 c 4 4
108			[[ ! -e ${rootfs}/dev/tty5 ]] && mknod -m 666 ${rootfs}/dev/tty5 c 4 5
109			[[ ! -e ${rootfs}/dev/tty6 ]] && mknod -m 666 ${rootfs}/dev/tty6 c 4 6
110			[[ ! -e ${rootfs}/dev/full ]] && mknod -m 666 ${rootfs}/dev/full c 1 7
111			[[ ! -e ${rootfs}/dev/initctl ]] && mknod -m 600 ${rootfs}/dev/initctl p
112			[[ ! -e ${rootfs}/dev/ptmx ]] && mknod -m 666 ${rootfs}/dev/ptmx c 5 2
113
114			return 0
115			}
116
117			download_magellan()
118			{
119			local cache="$1"
120			local arch="$2"
121			local distribution="unstable"
122			local mageprofile="$(basename $(readlink /etc/mage-profile))"
123			local extrapackages="dialog iproute2 openssh"
124
125			# check the mini magellan was not already downloaded
126			mkdir -p "${cache}/partial-${arch}"
127			if [ $? -ne 0 ]
128			then
129			echo "Failed to create '${cache}/partial-${arch}' directory"
130			return 1
131			fi
132
133			# setup magerc
134			cat <<EOF > ${cache}/partial-${arch}/mage.rc.bootstrap
135			ARCH="${arch}"
136			MAGE_DISTRIBUTION="${distribution}"
137
138			MAGEDIR="/usr/mage"
139			PKGDIR="/var/cache/mage/packages"
140			BUILDDIR="/var/tmp/magebuild"
141			INSTALLDB="/var/db/mage"
142			VIRTUALDB_DEFAULTS="/etc/mage-profile/virtuals.defaults"
143			VIRTUALDB_FILE="\${INSTALLDB}/virtuals"
144
145			VERBOSE="off"
146			MAGEDEBUG="off"
147
148			MIRRORS="http://magellan-linux.de/magellan/magellan-dev/svn/\${MAGE_DISTRIBUTION}"
149			RSYNC="rsync://magellan-linux.de/mage-svn"
150
151			PACKAGES_SERVER_PATH="packages/\${ARCH}"
152			MAGE_UNINSTALL_TIMEOUT=0
153			EOF
154
155			# download a mini magellan into a cache
156			echo "Downloading magellan minimal ..."
157			mage-bootstrap --profile ${mageprofile} --root ${cache}/partial-${arch} --magerc ${cache}/partial-${arch}/mage.rc.bootstrap --update-tarball
158			if [ $? -ne 0 ]
159			then
160			echo "Failed to download the rootfs, aborting."
161			return 1
162			fi
163
164			# install extra packages
165			for pkg in ${extrapackages}
166			do
167			MROOT=${cache}/partial-${arch} mage install ${pkg}
168			if [ $? -ne 0 ]
169			then
170			echo "Failed to install package ${pkg}, aborting."
171			return 1
172			fi
173			done
174
175			mv "${cache}/partial-${arch}" "${cache}/rootfs-${arch}"
176			echo "Download complete."
177
178			return 0
179			}
180
181			copy_magellan()
182			{
183			local cache="$1"
184			local arch="$2"
185			local rootfs="$3"
186
187			# make a local copy of the minimagellan
188			echo "Copying rootfs to ${rootfs}..."
189			cp -a ${cache}/rootfs-${arch} ${rootfs} \|\| return 1
190			return 0
191			}
192
193			install_magellan()
194			{
195			local cache="/var/cache/lxc/magellan"
196			local rootfs="$1"
197
198			mkdir -p /var/lock/subsys/
199			(
200			flock -n -x 200
201			if [ $? -ne 0 ]
202			then
203			echo "Cache repository is busy."
204			return 1
205			fi
206
207			arch=$(uname -m)
208			echo "Checking cache download in ${cache}/rootfs-${arch} ... "
209			if [ ! -e "${cache}/rootfs-${arch}" ]
210			then
211			download_magellan "${cache}" "${arch}"
212			if [ $? -ne 0 ]
213			then
214			echo "Failed to download 'magellan base'"
215			return 1
216			fi
217			fi
218
219			install -d $(dirname ${rootfs})
220			copy_magellan "${cache}" "${arch}" "${rootfs}"
221			if [ $? -ne 0 ]; then
222			echo "Failed to copy rootfs"
223			return 1
224			fi
225
226			return 0
227
228			) 200>/var/lock/subsys/lxc
229
230			return $?
231			}
232
233			copy_configuration()
234			{
235			local path="$1"
236			local rootfs="$2"
237			local name="$3"
238
239			cat <<EOF >> ${path}/config
240			lxc.tty = 4
241			lxc.pts = 1024
242			lxc.rootfs = ${rootfs}
243			lxc.cgroup.devices.deny = a
244			# /dev/null and zero
245			lxc.cgroup.devices.allow = c 1:3 rwm
246			lxc.cgroup.devices.allow = c 1:5 rwm
247			# consoles
248			lxc.cgroup.devices.allow = c 5:1 rwm
249			lxc.cgroup.devices.allow = c 5:0 rwm
250			lxc.cgroup.devices.allow = c 4:0 rwm
251			lxc.cgroup.devices.allow = c 4:1 rwm
252			# /dev/{,u}random
253			lxc.cgroup.devices.allow = c 1:9 rwm
254			lxc.cgroup.devices.allow = c 1:8 rwm
255			lxc.cgroup.devices.allow = c 136:* rwm
256			lxc.cgroup.devices.allow = c 5:2 rwm
257			# rtc
258			lxc.cgroup.devices.allow = c 254:0 rwm
259
260			# mounts point
261			lxc.mount.entry=proc ${rootfs}/proc proc nodev,noexec,nosuid 0 0
262			lxc.mount.entry=devpts ${rootfs}/dev/pts devpts defaults 0 0
263			lxc.mount.entry=sysfs ${rootfs}/sys sysfs defaults 0 0
264			EOF
265
266			if [ $? -ne 0 ]
267			then
268			echo "Failed to add configuration"
269			return 1
270			fi
271
272			return 0
273			}
274
275			clean()
276			{
277			local cache="/var/cache/lxc/magellan"
278
279			if [ ! -e ${cache} ]
280			then
281			exit 0
282			fi
283
284			# lock, so we won't purge while someone is creating a repository
285			(
286			flock -n -x 200
287			if [ $? != 0 ]; then
288			echo "Cache repository is busy."
289			exit 1
290			fi
291
292			echo -n "Purging the download cache..."
293			rm --preserve-root --one-file-system -rf ${cache} && echo "Done." \|\| exit 1
294			exit 0
295			) 200>/var/lock/subsys/lxc
296			}
297
298			usage()
299			{
300			cat <<EOF
301			$1 -h\|--help -p\|--path=<path> --clean
302			EOF
303			return 0
304			}
305
306			options=$(getopt -o hp:n:c -l help,path:,name:,clean -- "$@")
307			if [ $? -ne 0 ]
308			then
309			usage $(basename $0)
310			exit 1
311			fi
312			eval set -- "${options}"
313
314			while true
315			do
316			case "$1" in
317			-h\|--help) usage $0 && exit 0;;
318			-p\|--path) path=$2; shift 2;;
319			-n\|--name) name=$2; shift 2;;
320			-c\|--clean) clean=$2; shift 2;;
321			--) shift 1; break ;;
322			*) break ;;
323			esac
324			done
325
326			if [ ! -z "${clean}" -a -z "${path}" ]
327			then
328			clean \|\| exit 1
329			exit 0
330			fi
331
332			# sanity checks
333			[ "$(id -u)" != "0" ] && die "This script should be run as 'root'"
334			type mage-bootstrap \|\| die "'mage-bootstrap' command is missing"
335			[ -z "${path}" ] && die "'path' parameter is required"
336
337			rootfs=${path}/rootfs
338
339			install_magellan ${rootfs} \|\| die "failed to install magellan"
340			configure_magellan ${rootfs} ${name} \|\| die "failed to configure debian for a container"
341			copy_configuration ${path} ${rootfs} \|\| die "failed write configuration file"
342
343			if [ ! -z ${clean} ]
344			then
345			clean \|\| exit 1
346			exit 0
347			fi