summaryrefslogtreecommitdiffstats
path: root/mkarchroot.in
blob: 9361bef3ab47b80eea98331a1500604ed30a592b (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
#!/bin/bash
# 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; version 2 of the License.
#
# 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.

m4_include(lib/common.sh)

FORCE='n'
RUN=''
NOCOPY='n'

working_dir=''

APPNAME=$(basename "${0}")

# usage: usage <exitvalue>
usage() {
	echo "usage ${APPNAME} [options] working-dir [package-list | app]"
	echo ' options:'
	echo '    -r <app>      Run "app" within the context of the chroot'
	echo '    -u            Update the chroot via pacman'
	echo '    -f            Force overwrite of files in the working-dir'
	echo '    -C <file>     Location of a pacman config file'
	echo '    -M <file>     Location of a makepkg config file'
	echo '    -n            Do not copy config files into the chroot'
	echo '    -c <dir>      Set pacman cache. Default: /var/cache/pacman/pkg'
	echo '    -h            This message'
	exit 1
}

while getopts 'r:ufnhC:M:c:' arg; do
	case "${arg}" in
		r) RUN="$OPTARG" ;;
		u) RUN='/bin/sh -c "pacman -Syu --noconfirm && (pacman -Qqu >/dev/null && pacman -Su --noconfirm || exit 0)"' ;;
		f) FORCE='y' ;;
		C) pac_conf="$OPTARG" ;;
		M) makepkg_conf="$OPTARG" ;;
		n) NOCOPY='y' ;;
		c) cache_dir="$OPTARG" ;;
		h|?) usage 0 ;;
		*) error "invalid argument '${arg}'"; usage ;;
	esac
done

if [ "$EUID" != '0' ]; then
	die 'this script must be run as root.'
fi

shift $(($OPTIND - 1))

if [ "$RUN" = '' -a $# -lt 2 ]; then
	die 'you must specify a directory and one or more packages'
elif [ $# -lt 1 ]; then
	die 'you must specify a directory'
fi

working_dir="$(readlink -f ${1})"
shift 1

[ "${working_dir}" = '' ] && die 'please specify a working directory'

if [ -z "$cache_dir" ]; then
	cache_conf=${working_dir}/etc/pacman.conf
	[ ! -f $cache_conf ] && cache_conf=${pac_conf:-/etc/pacman.conf}
	cache_dir=$( (grep -m 1 '^CacheDir' $cache_conf || echo 'CacheDir = /var/cache/pacman/pkg') | sed 's/CacheDir\s*=\s*//')
	unset cache_conf
fi

if [ -f /etc/pacman.d/mirrorlist ]; then
	host_mirror=$(pacman -Sddp extra/devtools 2>/dev/null | sed -E 's#(.*/)extra/os/.*#\1$repo/os/$arch#')
fi
if [ -z "${host_mirror}" ]; then
	host_mirror='http://mirrors.kernel.org/archlinux/$repo/os/$arch'
fi
if echo "${host_mirror}" | grep -q 'file://'; then
	host_mirror_path=$(echo "${host_mirror}" | sed -E 's#file://(/.*)/\$repo/os/\$arch#\1#g')
fi

# {{{ functions
chroot_mount() {
	[ -e "${working_dir}/sys" ] || mkdir "${working_dir}/sys"
	mount -t sysfs sysfs "${working_dir}/sys"

	[ -e "${working_dir}/proc" ] || mkdir "${working_dir}/proc"
	mount -t proc proc "${working_dir}/proc"

	[ -e "${working_dir}/dev" ] || mkdir "${working_dir}/dev"
	mount -t tmpfs dev "${working_dir}/dev" -o mode=0755,size=10M,nosuid
	mknod -m 666 "${working_dir}/dev/null" c 1 3
	mknod -m 666 "${working_dir}/dev/zero" c 1 5
	mknod -m 600 "${working_dir}/dev/console" c 5 1
	mknod -m 644 "${working_dir}/dev/random" c 1 8
	mknod -m 644 "${working_dir}/dev/urandom" c 1 9
	mknod -m 666 "${working_dir}/dev/tty" c 5 0
	mknod -m 666 "${working_dir}/dev/tty0" c 4 0
	mknod -m 666 "${working_dir}/dev/full" c 1 7
	ln -s /proc/kcore "${working_dir}/dev/core"
	ln -s /proc/self/fd "${working_dir}/dev/fd"
	ln -s /proc/self/fd/0 "${working_dir}/dev/stdin"
	ln -s /proc/self/fd/1 "${working_dir}/dev/stdout"
	ln -s /proc/self/fd/2 "${working_dir}/dev/stderr"

	[ -e "${working_dir}/dev/shm" ] || mkdir "${working_dir}/dev/shm"
	mount -t tmpfs shm "${working_dir}/dev/shm" -o nodev,nosuid,size=128M

	[ -e "${working_dir}/dev/pts" ] || mkdir "${working_dir}/dev/pts"
	mount -t devpts devpts "${working_dir}/dev/pts" -o newinstance,ptmxmode=666
	ln -s pts/ptmx "${working_dir}/dev/ptmx"

	[ -e "${cache_dir}" ] || mkdir -p "${cache_dir}"
	[ -e "${working_dir}/${cache_dir}" ] || mkdir -p "${working_dir}/${cache_dir}"
	mount -o bind "${cache_dir}" "${working_dir}/${cache_dir}"

	if [ -n "${host_mirror_path}" ]; then
		[ -e "${working_dir}/${host_mirror_path}" ] || mkdir -p "${working_dir}/${host_mirror_path}"
		mount -o bind "${host_mirror_path}" "${working_dir}/${host_mirror_path}"
		mount -o remount,ro,bind "${host_mirror_path}" "${working_dir}/${host_mirror_path}"
	fi

	trap 'chroot_umount' EXIT INT QUIT TERM HUP
}

copy_hostconf () {
	chroot "${working_dir}" /bin/findmnt -rnu -o SOURCE,TARGET,FSTYPE,OPTIONS > "${working_dir}/etc/mtab"
	cp /etc/resolv.conf "${working_dir}/etc/resolv.conf"
	echo "Server = ${host_mirror}" > ${working_dir}/etc/pacman.d/mirrorlist
}

chroot_umount () {
	umount "${working_dir}/proc"
	umount "${working_dir}/sys"
	umount "${working_dir}/dev/pts"
	umount "${working_dir}/dev/shm"
	umount "${working_dir}/dev"
	umount "${working_dir}/${cache_dir}"
	[ -n "${host_mirror_path}" ] && umount "${working_dir}/${host_mirror_path}"
}

chroot_lock () {
	# Only reopen the FD if it wasn't handed to us
	if [ "$(readlink -f /dev/fd/9)" != "${working_dir}.lock" ]; then
	  exec 9>"${working_dir}.lock"
	fi

	# Lock the chroot. Take note of the FD number.
	if ! flock -n 9; then
		stat_busy "locking chroot"
		flock 9
		stat_done
	fi
}
# }}}

umask 0022
if [ "$RUN" != "" ]; then
	# run chroot {{{
	#Sanity check
	if [ ! -f "${working_dir}/.arch-chroot" ]; then
		die "'${working_dir}' does not appear to be a Arch chroot"
	fi

	chroot_lock
	chroot_mount
	copy_hostconf

	eval chroot "${working_dir}" ${RUN}

	# }}}
else
	# {{{ build chroot
	if [ -e "${working_dir}" -a "${FORCE}" = "n" ]; then
		die "working dir '${working_dir}' already exists - try using -f"
	fi

	if { type -P btrfs && btrfs subvolume create "${working_dir}"; } &>/dev/null; then
		chmod 0755 "${working_dir}"
	fi

	mkdir -p "${working_dir}/var/lib/pacman/sync"
	mkdir -p "${working_dir}/etc/"

	chroot_lock
	chroot_mount

	pacargs="--noconfirm --root=${working_dir} --cachedir=${cache_dir}"
	if [ "$pac_conf" != "" ]; then
		pacargs="$pacargs --config=${pac_conf}"
	fi

	if [ $# -ne 0 ]; then
		op='-Sy'
		if [ "$FORCE" = "y" ]; then
			op="${op}f"
		fi
		if ! pacman ${op} ${pacargs} $@; then
			die 'failed to install all packages'
		fi
	fi

	if [ -d "${working_dir}/lib/modules" ]; then
		ldconfig -r "${working_dir}"
	fi

	if [ "$pac_conf" != "" -a "$NOCOPY" = "n" ]; then
		cp ${pac_conf} ${working_dir}/etc/pacman.conf
	fi

	if [ "$makepkg_conf" != "" -a "$NOCOPY" = "n" ]; then
		cp ${makepkg_conf} ${working_dir}/etc/makepkg.conf
	fi

	if [ -e "${working_dir}/etc/locale.gen" ]; then
		sed -i 's@^#\(en_US\|de_DE\)\(\.UTF-8\)@\1\2@' "${working_dir}/etc/locale.gen"
		chroot "${working_dir}" /usr/sbin/locale-gen
	fi

	if [ ! -e "${working_dir}/.arch-chroot" ]; then
		date +%s > "${working_dir}/.arch-chroot"
	fi
	# }}}
fi