projects/aports·blob v2.11.1 · refs

305 lines · 6.8 KiB

1#!/bin/busybox sh
2
3# this is the init script version
4VERSION=1.1
5NEWROOT=/newroot
6SINGLEMODE=no
7
8/bin/busybox --install -s
9
10# basic environment
11export PATH=/usr/bin:/bin:/usr/sbin:/sbin
12
13# needed devs
14[ -c /dev/null ] || mknod -m 666 /dev/null c 1 3
15
16# basic mounts
17mount -t proc -o noexec,nosuid,nodev proc /proc
18mount -t sysfs -o noexec,nosuid,nodev sysfs /sys
19
20# some helpers
21ebegin() {
22 echo -n " * $*: "
23}
24eend() {
25 local msg
26 if [ "$1" = 0 ] || [ $# -lt 1 ] ; then
27 echo "ok."
28 else
29 shift
30 echo "failed. $*"
31 echo "initramfs emergency recovery shell launched. Type 'exit' to continue boot"
32 /bin/busybox sh
33 fi
34}
35
36scan_drivers() {
37 if [ "$AUTODETECT" != no ] ; then
38 find /sys -name modalias | xargs sort -u | xargs modprobe -a 2> /dev/null
39 fi
40}
41
42find_ovl() {
43 local mnt="$1"
44 local ovl
45 local lines
46
47 # look for apkovl's on mounted media
48 ovl=$( ls -1 "$mnt"/*.apkovl.tar.gz* 2>/dev/null ) || return 1
49 lines=$(echo "$ovl" | wc -l)
50
51 if [ $lines -gt 1 ] ; then
52 echo "ERROR: More than one apkovl file was found on $(basename $mnt). None will be read." >&2
53 return 1
54 fi
55 echo "$ovl"
56}
57
58retry_mount() {
59 # usb might need some time to settle so we retry a few times
60 for i in $(seq 0 19); do
61 mount $@ 2>&1 && return 0
62 sleep 1
63 done
64 return 1
65}
66
67unpack_apkovl() {
68 local ovl="$1"
69 local dest="$2"
70 local suffix=${ovl##*.}
71 local i
72 if [ "$suffix" = "gz" ]; then
73 tar -C "$dest" -zxf "$ovl"
74 return $?
75 fi
76
77 for i in $ALPINE_MNT/*/*/openssl-[0-9]*.apk $ALPINE_MNT/*/openssl-[0-9]*.apk; do
78 [ -f "$i" ] && tar --numeric-owner -C / -zxf $i && break
79 done
80
81 if ! openssl list-cipher-commands | grep "^$suffix$" > /dev/null; then
82 errstr="Cipher $suffix is not supported"
83 return 1
84 fi
85 local count=0
86 # beep
87 echo -e "\007"
88 while [ $count -lt 3 ]; do
89 openssl enc -d -$suffix -in "$ovl" | tar --numeric-owner \
90 -C "$dest" -zx 2>/dev/null && return 0
91 count=$(( $count + 1 ))
92 done
93 return 1
94}
95
96# gotta start from somewhere :)
97echo "Alpine Init $VERSION"
98
99# read the kernel options
100for i in `cat /proc/cmdline` ; do
101 case $i in
102 s|single|1)
103 SINGLEMODE=yes ;;
104 modules=*)
105 MODULES="`echo ${i#modules=} | tr ',' ' '`";;
106 noautodetect)
107 AUTODETECT=no;;
108 *=*) eval KOPT_$i ;;
109 *) eval KOPT_$i=yes ;;
110 esac
111done
112
113# start bootcharting if wanted
114if [ -n "$KOPT_chart" ]; then
115 ebegin "Starting bootchart logging"
116 /sbin/bootchartd start-initfs "$NEWROOT"
117 eend 0
118fi
119
120ALPINE_DEV=${KOPT_alpine_dev%%:*}
121ALPINE_DEV_FS=${KOPT_alpine_dev##*:}
122if [ "$ALPINE_DEV_FS" = "$ALPINE_DEV" ]; then
123 unset ALPINE_DEV_FS
124fi
125ALPINE_MNT=/media/$ALPINE_DEV
126
127# hide kernel messages
128dmesg -n 1
129
130# setup /dev
131ebegin "Starting mdev"
132mount -t tmpfs -o exec,nosuid,mode=0755 mdev /dev
133ln -s sr0 /dev/cdrom
134echo "/sbin/mdev" > /proc/sys/kernel/hotplug
135mdev -s
136RC=$?
137[ -d /dev/pts ] || mkdir -m 755 /dev/pts
138[ -c /dev/ptmx ] || mknod -m 666 /dev/ptmx c 5 2
139mount -t devpts -o gid=5,mode=0620,noexec,nosuid devpts /dev/pts
140[ -d /dev/shm ] || mkdir /dev/shm
141mount -t tmpfs -o nodev,nosuid,noexec shm /dev/shm
142eend $RC
143
144# load available drivers to get access to modloop media
145ebegin "Loading boot drivers"
146[ "$MODULES" ] && modprobe -a $MODULES 2> /dev/null
147if [ -f /etc/modules ] ; then
148 sed 's/\#.*//g' < /etc/modules |
149 while read module args; do
150 modprobe -q $module $args
151 done
152fi
153scan_drivers
154scan_drivers
155eend 0
156
157# check if root=... was set
158if [ -n "$KOPT_root" ]; then
159 if [ "$SINGLEMODE" = "yes" ]; then
160 echo "Entering single mode. Type 'exit' to continue booting."
161 sh
162 fi
163 case "$KOPT_root" in
164 /dev/md*)
165 mknod $KOPT_root b 9 ${KOPT_root#/dev/md}
166 raidautorun "$KOPT_root"
167 ;;
168 esac
169 ebegin "Mounting root"
170 retry_mount $KOPT_root $NEWROOT 2>/dev/null
171 eend $?
172 cat /proc/mounts | while read DEV DIR TYPE OPTS ; do
173 if [ "$DIR" != "/" -a "$DIR" != "$NEWROOT" -a -d "$DIR" ]; then
174 mkdir -p $NEWROOT/$DIR
175 mount -o move $DIR $NEWROOT/$DIR
176 fi
177 done
178 sync
179 exec /bin/busybox switch_root $NEWROOT $chart_init /sbin/init $KOPT_init_args
180 echo "initramfs emergency recovery shell launched"
181 exec /bin/busybox sh
182fi
183
184# locate boot media and mount it
185ebegin "Mounting boot media"
186mkdir -p $ALPINE_MNT
187if [ -n "$ALPINE_DEV_FS" ]; then
188 mount_opts="-t $ALPINE_DEV_FS"
189fi
190
191retry_mount $mount_opts /dev/$ALPINE_DEV $ALPINE_MNT >/dev/null 2>&1
192eend $?
193
194ebegin "Mounting loopback device for kernel modules"
195modprobe loop
196if [ -n "$KOPT_modloop" ]; then
197 modloop=$KOPT_modloop
198else
199 modloop=$KOPT_BOOT_IMAGE.cmg
200fi
201mount -o loop,ro -t cramfs $ALPINE_MNT/$modloop /.modloop
202rc=$?
203if [ "$rc" = 0 ]; then
204 rm -rf /lib/modules
205 ln -sf /.modloop/modules /lib
206fi
207eend $?
208
209if [ -d $ALPINE_MNT/firmware ]; then
210 ebegin "Copying firmware from $ALPINE_MNT/firmware"
211 mkdir -p /lib
212 cp -R -a $ALPINE_MNT/firmware /lib/
213 eend $?
214fi
215
216mkdir -p /etc/apk
217for i in $ALPINE_MNT/*/APK_INDEX.gz $ALPINE_MNT/*/*/APK_INDEX.gz; do
218 [ -r "$i" ] && echo ${i%/APK_INDEX.gz} >> /etc/apk/repositories
219done
220
221# early console?
222if [ "$SINGLEMODE" = "yes" ]; then
223 echo "Entering single mode. Type 'exit' to continue booting."
224 sh
225fi
226
227# more drivers
228ebegin "Loading hardware drivers"
229scan_drivers
230eend 0
231
232mount -t tmpfs tmpfs $NEWROOT
233
234# look for apkovl
235if dmesg | grep '^usb-storage: waiting' >/dev/null; then
236 ebegin "Waiting for USB device to settle"
237 while ! dmesg | grep 'usb-storage: device scan complete' >/dev/null; do
238 sleep 1
239 done
240 eend 0
241fi
242for i in usb floppy cdrom; do
243 mount /media/$i 2>/dev/null || continue
244 ovl=$(find_ovl /media/$i)
245 [ -f "$ovl" ] && break
246 umount /media/$i 2>/dev/null
247done
248if ! [ -f "$ovl" ]; then
249 ovl=$(find_ovl $ALPINE_MNT)
250fi
251
252if [ -f "$ovl" ]; then
253 ebegin "Loading user settings from $ovl"
254 unpack_apkovl "$ovl" $NEWROOT
255 eend $? $errstr
256 umount /media/$i 2>/dev/null &
257 pkgs=$(sed 's/\#.*//' $NEWROOT/etc/lbu/packages.list 2>/dev/null)
258fi
259
260# install new root
261ebegin "Installing packages to root filesystem"
262if [ -n "$KOPT_chart" ]; then
263 pkgs="$pkgs acct"
264fi
265apkflags="--initdb --quiet --progress --force"
266if [ -z "$KOPT_keep_apk_new" ]; then
267 apkflags="$apkflags --clean-protected"
268fi
269apk add --root /newroot $apkflags $pkgs >/dev/null
270eend $?
271
272# copy alpine release info
273cp $ALPINE_MNT/.alpine-release $NEWROOT/
274ln -sf /.alpine-release $NEWROOT/etc/alpine-release
275
276# if there is no repositories file, then use the default
277if ! [ -f $NEWROOT/etc/apk/repositories ]; then
278 cp /etc/apk/repositories $NEWROOT/etc/apk/repositories
279fi
280
281# setup bootchart for switch_root
282chart_init=""
283if [ -n "$KOPT_chart" ]; then
284 /sbin/bootchartd stop-initfs "$NEWROOT"
285 chart_init="/sbin/bootchartd start-rootfs"
286fi
287
288# switch over to new root
289cat /proc/mounts | while read DEV DIR TYPE OPTS ; do
290 if [ "$DIR" != "/" -a "$DIR" != "$NEWROOT" -a -d "$DIR" ]; then
291 mkdir -p $NEWROOT/$DIR
292 mount -o move $DIR $NEWROOT/$DIR
293 fi
294done
295ln -sf /.modloop/modules $NEWROOT/lib/modules
296sync
297
298echo ""
299if [ -x $NEWROOT/sbin/init ]; then
300 exec /bin/busybox switch_root $NEWROOT $chart_init /sbin/init $KOPT_init_args
301fi
302
303echo "initramfs emergency recovery shell launched"
304exec /bin/busybox sh
305reboot