berryboot_linuxrc
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berryboot_linuxrc [2012/06/12 14:04] (current) max created |
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| + | /linuxrc | ||
| + | <code> | ||
| + | #!/bin/sh | ||
| + | # | ||
| + | # BerryBoot, ugly but functional image chooser thingy | ||
| + | # | ||
| + | # Author: Floris Bos | ||
| + | # | ||
| + | |||
| + | # Standard busybox init | ||
| + | /bin/mount -t proc proc /proc | ||
| + | /bin/mount -o remount,rw,noatime / | ||
| + | /bin/mount -a | ||
| + | /bin/hostname -F /etc/hostname | ||
| + | |||
| + | # Enumerate images | ||
| + | cd /images | ||
| + | IMAGES=`echo *` | ||
| + | DIALOG_ARGS="--backtitle 'BerryBoot v0.1' --menu 'Select operating system to boot:' 15 50 10" | ||
| + | |||
| + | for image in $IMAGES | ||
| + | do | ||
| + | DIALOG_ARGS="$DIALOG_ARGS '$image' ''" | ||
| + | done | ||
| + | |||
| + | # Prevent kernel messages being printed through our menu | ||
| + | echo 0 > /proc/sys/kernel/printk | ||
| + | |||
| + | # Show dialog | ||
| + | eval dialog $DIALOG_ARGS 2>/tmp/answer | ||
| + | |||
| + | if [ $? -eq 0 ]; then | ||
| + | echo 1 > /proc/sys/kernel/printk | ||
| + | IMAGE=`cat /tmp/answer` | ||
| + | DATADIR="/data/$IMAGE" | ||
| + | rm /tmp/answer | ||
| + | mkdir -p /mnt/squashfs /mnt/aufs $DATADIR | ||
| + | modprobe aufs | ||
| + | modprobe squashfs | ||
| + | echo Mounting image ${IMAGE}... | ||
| + | mount -o loop $IMAGE /mnt/squashfs | ||
| + | echo Mounting RW data directory on top | ||
| + | mount -t aufs -o br:${DATADIR}:/shared:/mnt/squashfs none /mnt/aufs | ||
| + | cd /mnt/aufs | ||
| + | mkdir -p -m 700 .berryboot | ||
| + | umount /sys | ||
| + | umount /dev/pts | ||
| + | umount /dev/shm | ||
| + | umount /tmp | ||
| + | umount /proc | ||
| + | pivot_root . .berryboot | ||
| + | exec chroot . /sbin/init </dev/console 2>/dev/console | ||
| + | fi | ||
| + | |||
| + | # In case the user pressed cancel or something went wrong, show an emergency recovery shell | ||
| + | echo | ||
| + | echo Emergency shell activated | ||
| + | echo | ||
| + | echo To get network connectivity: udhcpc eth0 - wget can be used to download things | ||
| + | echo Squashfs images are in /images | ||
| + | echo User changes to the images are in /data | ||
| + | echo Before shutting down remount readonly: mount -o remount,ro / | ||
| + | echo | ||
| + | |||
| + | /bin/sh | ||
| + | </code> | ||
berryboot_linuxrc.txt ยท Last modified: 2012/06/12 14:04 by max
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