mirror of
https://gitlab.alpinelinux.org/alpine/abuild.git
synced 2024-12-28 01:42:12 +00:00
306 lines
6.8 KiB
Plaintext
Executable File
306 lines
6.8 KiB
Plaintext
Executable File
#!/bin/busybox sh
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# this is the init script version
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VERSION=1.1
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NEWROOT=/newroot
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SINGLEMODE=no
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/bin/busybox --install -s
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# basic environment
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export PATH=/usr/bin:/bin:/usr/sbin:/sbin
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# needed devs
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[ -c /dev/null ] || mknod -m 666 /dev/null c 1 3
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# basic mounts
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mount -t proc -o noexec,nosuid,nodev proc /proc
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mount -t sysfs -o noexec,nosuid,nodev sysfs /sys
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# some helpers
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ebegin() {
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echo -n " * $*: "
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}
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eend() {
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local msg
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if [ "$1" = 0 ] || [ $# -lt 1 ] ; then
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echo "ok."
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else
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shift
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echo "failed. $*"
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echo "initramfs emergency recovery shell launched. Type 'exit' to continue boot"
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/bin/busybox sh
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fi
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}
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scan_drivers() {
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if [ "$AUTODETECT" != no ] ; then
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find /sys -name modalias | xargs sort -u | xargs modprobe -a 2> /dev/null
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fi
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}
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find_ovl() {
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local mnt="$1"
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local ovl
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local lines
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# look for apkovl's on mounted media
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ovl=$( ls -1 "$mnt"/*.apkovl.tar.gz* 2>/dev/null ) || return 1
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lines=$(echo "$ovl" | wc -l)
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if [ $lines -gt 1 ] ; then
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echo "ERROR: More than one apkovl file was found on $(basename $mnt). None will be read." >&2
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return 1
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fi
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echo "$ovl"
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}
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retry_mount() {
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# usb might need some time to settle so we retry a few times
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for i in $(seq 0 19); do
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mount $@ 2>&1 && return 0
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sleep 1
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done
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return 1
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}
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unpack_apkovl() {
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local ovl="$1"
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local dest="$2"
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local suffix=${ovl##*.}
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local i
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if [ "$suffix" = "gz" ]; then
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tar -C "$dest" -zxf "$ovl"
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return $?
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fi
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for i in $ALPINE_MNT/*/*/openssl-[0-9]*.apk $ALPINE_MNT/*/openssl-[0-9]*.apk; do
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[ -f "$i" ] && tar --numeric-owner -C / -zxf $i && break
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done
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if ! openssl list-cipher-commands | grep "^$suffix$" > /dev/null; then
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errstr="Cipher $suffix is not supported"
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return 1
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fi
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local count=0
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# beep
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echo -e "\007"
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while [ $count -lt 3 ]; do
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openssl enc -d -$suffix -in "$ovl" | tar --numeric-owner \
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-C "$dest" -zx 2>/dev/null && return 0
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count=$(( $count + 1 ))
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done
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return 1
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}
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# gotta start from somewhere :)
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echo "Alpine Init $VERSION"
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# read the kernel options
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for i in `cat /proc/cmdline` ; do
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case $i in
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s|single|1)
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SINGLEMODE=yes ;;
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modules=*)
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MODULES="`echo ${i#modules=} | tr ',' ' '`";;
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noautodetect)
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AUTODETECT=no;;
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*=*) eval KOPT_$i ;;
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*) eval KOPT_$i=yes ;;
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esac
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done
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# start bootcharting if wanted
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if [ -n "$KOPT_chart" ]; then
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ebegin "Starting bootchart logging"
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/sbin/bootchartd start-initfs "$NEWROOT"
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eend 0
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fi
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ALPINE_DEV=${KOPT_alpine_dev%%:*}
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ALPINE_DEV_FS=${KOPT_alpine_dev##*:}
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if [ "$ALPINE_DEV_FS" = "$ALPINE_DEV" ]; then
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unset ALPINE_DEV_FS
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fi
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ALPINE_MNT=/media/$ALPINE_DEV
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# hide kernel messages
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dmesg -n 1
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# setup /dev
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ebegin "Starting mdev"
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mount -t tmpfs -o exec,nosuid,mode=0755 mdev /dev
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ln -s sr0 /dev/cdrom
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echo "/sbin/mdev" > /proc/sys/kernel/hotplug
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mdev -s
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RC=$?
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[ -d /dev/pts ] || mkdir -m 755 /dev/pts
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[ -c /dev/ptmx ] || mknod -m 666 /dev/ptmx c 5 2
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mount -t devpts -o gid=5,mode=0620,noexec,nosuid devpts /dev/pts
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[ -d /dev/shm ] || mkdir /dev/shm
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mount -t tmpfs -o nodev,nosuid,noexec shm /dev/shm
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eend $RC
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# load available drivers to get access to modloop media
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ebegin "Loading boot drivers"
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[ "$MODULES" ] && modprobe -a $MODULES 2> /dev/null
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if [ -f /etc/modules ] ; then
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sed 's/\#.*//g' < /etc/modules |
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while read module args; do
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modprobe -q $module $args
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done
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fi
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scan_drivers
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scan_drivers
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eend 0
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# check if root=... was set
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if [ -n "$KOPT_root" ]; then
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if [ "$SINGLEMODE" = "yes" ]; then
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echo "Entering single mode. Type 'exit' to continue booting."
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sh
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fi
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case "$KOPT_root" in
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/dev/md*)
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mknod $KOPT_root b 9 ${KOPT_root#/dev/md}
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raidautorun "$KOPT_root"
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;;
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esac
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ebegin "Mounting root"
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retry_mount $KOPT_root $NEWROOT 2>/dev/null
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eend $?
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cat /proc/mounts | while read DEV DIR TYPE OPTS ; do
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if [ "$DIR" != "/" -a "$DIR" != "$NEWROOT" -a -d "$DIR" ]; then
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mkdir -p $NEWROOT/$DIR
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mount -o move $DIR $NEWROOT/$DIR
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fi
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done
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sync
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exec /bin/busybox switch_root $NEWROOT $chart_init /sbin/init $KOPT_init_args
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echo "initramfs emergency recovery shell launched"
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exec /bin/busybox sh
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fi
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# locate boot media and mount it
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ebegin "Mounting boot media"
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mkdir -p $ALPINE_MNT
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if [ -n "$ALPINE_DEV_FS" ]; then
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mount_opts="-t $ALPINE_DEV_FS"
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fi
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retry_mount $mount_opts /dev/$ALPINE_DEV $ALPINE_MNT >/dev/null 2>&1
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eend $?
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ebegin "Mounting loopback device for kernel modules"
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modprobe loop
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if [ -n "$KOPT_modloop" ]; then
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modloop=$KOPT_modloop
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else
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modloop=$KOPT_BOOT_IMAGE.cmg
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fi
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mount -o loop,ro -t cramfs $ALPINE_MNT/$modloop /.modloop
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rc=$?
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if [ "$rc" = 0 ]; then
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rm -rf /lib/modules
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ln -sf /.modloop/modules /lib
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fi
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eend $?
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if [ -d $ALPINE_MNT/firmware ]; then
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ebegin "Copying firmware from $ALPINE_MNT/firmware"
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mkdir -p /lib
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cp -R -a $ALPINE_MNT/firmware /lib/
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eend $?
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fi
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mkdir -p /etc/apk
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for i in $ALPINE_MNT/*/APK_INDEX.gz $ALPINE_MNT/*/*/APK_INDEX.gz; do
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[ -r "$i" ] && echo ${i%/APK_INDEX.gz} >> /etc/apk/repositories
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done
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# early console?
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if [ "$SINGLEMODE" = "yes" ]; then
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echo "Entering single mode. Type 'exit' to continue booting."
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sh
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fi
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# more drivers
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ebegin "Loading hardware drivers"
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scan_drivers
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eend 0
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mount -t tmpfs tmpfs $NEWROOT
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# look for apkovl
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if dmesg | grep '^usb-storage: waiting' >/dev/null; then
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ebegin "Waiting for USB device to settle"
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while ! dmesg | grep 'usb-storage: device scan complete' >/dev/null; do
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sleep 1
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done
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eend 0
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fi
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for i in usb floppy cdrom; do
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mount /media/$i 2>/dev/null || continue
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ovl=$(find_ovl /media/$i)
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[ -f "$ovl" ] && break
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umount /media/$i 2>/dev/null
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done
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if ! [ -f "$ovl" ]; then
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ovl=$(find_ovl $ALPINE_MNT)
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fi
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if [ -f "$ovl" ]; then
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ebegin "Loading user settings from $ovl"
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unpack_apkovl "$ovl" $NEWROOT
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eend $? $errstr
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umount /media/$i 2>/dev/null &
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pkgs=$(sed 's/\#.*//' $NEWROOT/etc/lbu/packages.list 2>/dev/null)
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fi
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# install new root
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ebegin "Installing packages to root filesystem"
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if [ -n "$KOPT_chart" ]; then
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pkgs="$pkgs acct"
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fi
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apkflags="--initdb --quiet --progress --force"
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if [ -z "$KOPT_keep_apk_new" ]; then
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apkflags="$apkflags --clean-protected"
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fi
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apk add --root /newroot $apkflags $pkgs >/dev/null
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eend $?
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# copy alpine release info
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cp $ALPINE_MNT/.alpine-release $NEWROOT/
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ln -sf /.alpine-release $NEWROOT/etc/alpine-release
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# if there is no repositories file, then use the default
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if ! [ -f $NEWROOT/etc/apk/repositories ]; then
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cp /etc/apk/repositories $NEWROOT/etc/apk/repositories
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fi
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# setup bootchart for switch_root
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chart_init=""
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if [ -n "$KOPT_chart" ]; then
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/sbin/bootchartd stop-initfs "$NEWROOT"
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chart_init="/sbin/bootchartd start-rootfs"
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fi
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# switch over to new root
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cat /proc/mounts | while read DEV DIR TYPE OPTS ; do
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if [ "$DIR" != "/" -a "$DIR" != "$NEWROOT" -a -d "$DIR" ]; then
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mkdir -p $NEWROOT/$DIR
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mount -o move $DIR $NEWROOT/$DIR
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fi
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done
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ln -sf /.modloop/modules $NEWROOT/lib/modules
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sync
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echo ""
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if [ -x $NEWROOT/sbin/init ]; then
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exec /bin/busybox switch_root $NEWROOT $chart_init /sbin/init $KOPT_init_args
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fi
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echo "initramfs emergency recovery shell launched"
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exec /bin/busybox sh
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reboot
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