root / host / snf-image-update-helper.in @ d51a95a8
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#!/bin/bash |
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set -e |
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set -x |
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. @osdir@/common.sh |
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CACHE_FILE="$HELPER_DIR/cache.tar" |
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ARCH=amd64 |
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EXTRA_PKGS="linux-image-amd64,e2fsprogs,ntfs-3g,xmlstarlet" |
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helper_img=$(mktemp $HELPER_DIR/image.XXXXXXXX) |
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dd if=/dev/zero of=$helper_img bs=1k count=400000 |
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blockdev=$(losetup -sf $helper_img) |
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CLEANUP+=("losetup -d $blockdev") |
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format_disk0 $blockdev "extdump" |
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root_dev=$(map_disk0 $blockdev)-1 |
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CLEANUP+=("unmap_disk0 $blockdev") |
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mkfs.ext3 $root_dev |
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TMPDIR=$(mktemp -d) |
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CLEANUP+=("rmdir $TMPDIR") |
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mount $root_dev $TMPDIR |
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CLEANUP+=("umount $root_dev") |
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if [ -f "$CACHE_FILE" ]; then |
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tar xf "$CACHE_FILE" -C $TMPDIR |
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else |
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debootstrap --arch "$ARCH" --include $EXTRA_PKGS --variant=minbase \ |
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squeeze $TMPDIR |
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# remove the downloaded debs, as they are no longer needed |
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find "$TMPDIR/var/cache/apt/archives" -type f -name '*.deb' -print0 | \ |
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xargs -r0 rm -f |
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TMP_CACHE=$(mktemp "${CACHE_FILE}.XXXXXX") |
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tar cf "$TMP_CACHE" -C $TMPDIR . |
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mv -f "$TMP_CACHE" "$CACHE_FILE" |
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fi |
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echo helper > $TMPDIR/etc/hostname |
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cat > $TMPDIR/etc/fstab <<EOF |
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# /etc/fstab: static file system information. |
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# |
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# <file system> <mount point> <type> <options> <dump> <pass> |
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/dev/sda1 / ext3 defaults 0 1 |
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proc /proc proc defaults 0 0 |
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EOF |
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if [ ! -L "$TMPDIR/vmlinuz" -o ! -L "$TMPDIR/vmlinuz" ]; then |
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log_error "vmlinuz or initrd.img link in root is missing." |
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log_error "I don't know how to find a usable kernel/initrd pair." |
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exit 1 |
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fi |
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kernel=$(readlink -en $TMPDIR/vmlinuz) |
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initrd=$(readlink -en $TMPDIR/initrd.img) |
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echo "Moving $(basename $kernel) and $(basename $initrd) to $HELPER_DIR" |
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mv $kernel $initrd $HELPER_DIR |
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kernel=$(basename $kernel) |
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initrd=$(basename $initrd) |
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(cd $HELPER_DIR; ln -fs $kernel kernel; ln -fs $initrd initrd) |
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rm $TMPDIR/vmlinuz $TMPDIR/initrd.img |
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cleanup |
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mv $helper_img $HELPER_DIR/image |
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trap - EXIT |
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exit 0 |
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# vim: set sta sts=4 shiftwidth=4 sw=4 et ai : |