#!/bin/sh # # initramfs /init (busybox ash) # # color codes and some predefined texts BOLD="\033[1m" NORM="\033[0m" RED="\033[31m" GREEN="\033[32m" YELLOW="\033[33m" BLUE="\033[34m" OK="${BOLD}${GREEN}OK${NORM}" FAILED="${BOLD}${RED}FAILED${NORM}" # helper functions # check an exit value and print a colored status checkReturn() { if [ $? -ne 0 ] then echo -e $FAILED else echo -e $OK fi } # search for and mount the crux media, populate a tmpfs from it, # and prepare /newroot for switch_root at the end of the script find_and_mount_media() { echo -e " ${BOLD}${BLUE}*${NORM} Searching for the CRUX media..." mkdir -p /media CRUXMEDIA="" MMC_DEVICES="`grep -E 'mmcblk' /proc/partitions | awk '{ print $4 }'`" BLOCK_DEVICES="`grep -E '[sh]d' /proc/partitions | awk '{ print $4 }'`" for DEV in $MMC_DEVICES $BLOCK_DEVICES do DEV="/dev/$DEV" mount -r $DEV /media 2> /dev/null if [ $? -eq 0 ] then echo -e -n " ${BOLD}${GREEN}*${NORM} Found media on $DEV" if [ -e /media/crux-media ] then echo ", CRUX media." CRUXMEDIA=$DEV ln -s $DEV /dev/media break else echo ", but it's not the CRUX media." umount /media fi else echo -e " ${BOLD}${YELLOW}*${NORM} No media found on $DEV." fi done # check if the media was mounted properly. if not, spawn a shell if [ ! -e /media/crux-media ] then echo echo -e " ${BOLD}${RED}*${NORM} The CRUX media was not properly mounted!" echo " Spawning a shell for you to attempt to fix this problem. If" echo " you are able to find the correct device, mount it at" echo " /media and then log out of this shell to continue." echo " If you are NOT able to fix the problem, installation will" echo " not be possible." echo /bin/sh fi # check again and stop if it's still not there if [ ! -e /media/crux-media ] then echo echo -e " ${BOLD}${RED}*${NORM} The CRUX media still appears not to be" echo " found and installation will not continue." echo else # configure modules MODULES="`find /media/crux/kernel -type f -name 'modules-*.tar.*'`" if [ ! -z "$MODULES" ]; then tar -C /tmp -xf $MODULES cd /lib && ln -s /tmp/lib/* . depmod fi # configure pkgutils PKGUTILS="`find /media/crux/core -type f -name 'pkgutils#*.pkg.tar.*'`" if [ ! -z "$PKGUTILS" ]; then tar -C /tmp -xf $PKGUTILS cd /usr/bin && ln -s /tmp/usr/bin/* . cd /etc && ln -s /tmp/etc/* . fi fi } /bin/busybox --install -s /bin # # main script # echo "" echo -e "${BOLD}CRUX-ARM 2.7.1 - ${BLUE}http://crux-arm.nu/${NORM}" echo "" exec >/dev/console &1 echo -e -n " ${BOLD}${BLUE}*${NORM} Mounting " echo -e -n "${BOLD}${GREEN}/proc${NORM}" mount -t proc proc /proc PRINTK="`cat /proc/sys/kernel/printk`" echo "0" > /proc/sys/kernel/printk echo -e ", ${BOLD}${GREEN}/sys${NORM}." mount -t sysfs sysfs /sys echo -e -n " ${BOLD}${BLUE}*${NORM} Populating /dev via mdev... " mdev -s checkReturn echo -e -n " ${BOLD}${BLUE}*${NORM} Registering mdev as hotplug agent... " echo "/bin/mdev" > /proc/sys/kernel/hotplug checkReturn echo -e -n " ${BOLD}${BLUE}*${NORM} Creating and mounting /dev/pts... " mkdir /dev/pts mount -t devpts devpts /dev/pts checkReturn echo -e -n " ${BOLD}${BLUE}*${NORM} Starting kernel log daemon... " klogd checkReturn echo -e -n " ${BOLD}${BLUE}*${NORM} Setting hostname... " hostname crux checkReturn echo -e -n " ${BOLD}${BLUE}*${NORM} Loading network loopback device... " ip addr add 127.0.0.1/8 dev lo broadcast + scope host && \ ip link set lo up && \ echo "127.0.0.1 localhost crux" > /etc/hosts checkReturn echo -e -n " ${BOLD}${BLUE}*${NORM} Saving boot messages... " dmesg > /var/log/boot checkReturn grep -q "devicetimeout=*" /proc/cmdline if [ $? -eq 0 ] then for opt in `cat /proc/cmdline` do echo "$opt" | grep -q "devicetimeout=" if [ $? -eq 0 ] then DEVTIMEOUT=`echo $opt | cut -d'=' -f2` fi done else DEVTIMEOUT=10 fi echo -e " ${BOLD}${BLUE}*${NORM} Waiting $DEVTIMEOUT seconds for devices to settle..." sleep $DEVTIMEOUT # if root=/dev/XXX was specified on the command line, use that as the new root # instead of searching for the media and using it. if it fails, fall back to the media grep -q "root=/dev/*" /proc/cmdline if [ $? -eq 0 ] then for opt in `cat /proc/cmdline` do echo "$opt" | grep -q "root=" if [ $? -eq 0 ] then ROOTDEV=`echo $opt | cut -d'=' -f2` fi done mkdir -p /newroot # check the specified root device to see if it has an init mount $ROOTDEV /newroot if [ $? -ne 0 ] then echo -e " ${BOLD}${RED}*${NORM} Unable to mount the specified root device! Falling back to the live media." find_and_mount_media else if [ -x /newroot/sbin/init ] then echo -e " ${BOLD}${BLUE}*${NORM} Mounted root device $ROOTDEV." else echo -e " ${BOLD}${RED}*${NORM} The specified root device ($ROOTDEV) does not appear to be usable! Falling back to the live media." umount /newroot find_and_mount_media fi fi else find_and_mount_media fi echo -e "${BOLD}${BLUE}*${NORM} Switching root.\n" echo "$PRINTK" > /proc/sys/kernel/printk echo > /proc/sys/kernel/hotplug umount /sys umount /proc exec /bin/switch_root /newroot /sbin/init echo "Something's broken, here's a shell." exec /bin/sh # End of file