#!/bin/bash
set -e
+set -o pipefail
. @osdir@/common.sh
-CACHE_FILE="$HELPER_DIR/cache.tar"
-ARCH=amd64
-EXTRA_PKGS="linux-image-amd64,e2fsprogs,ntfs-3g,ntfsprogs,xmlstarlet,python"
-
if [ ! -e "$HELPER_PKG" ]; then
log_error "Helper package \`$HELPER_PKG' not found."
log_error "You need to provide this for the script to work"
exit 1
fi
+
cat >&1 <<EOF
This program will overwrite the following files:
\`$HELPER_DIR/initrd'
rm -f "$HELPER_DIR/initrd" "$HELPER_DIR/kernel" "$HELPER_DIR/image"
echo -n "Allocating space for helper disk image..."
-helper_img=$(mktemp $HELPER_DIR/image.XXXXXXXX)
+helper_img=$(mktemp "$HELPER_DIR/image.XXXXXX")
-dd if=/dev/zero of=$helper_img bs=1k count=400000 &> /dev/null
+dd if=/dev/zero of="$helper_img" bs=1k count=400000 &> /dev/null
echo "done"
+echo "Creating partitions..."
blockdev=$(losetup -sf $helper_img)
-CLEANUP+=("losetup -d $blockdev")
+add_cleanup losetup -d "$blockdev"
sleep 1 # sometimes losetup returns and the device is still busy..
-echo "Creating partitions..."
-format_disk0 $blockdev "extdump" 2>&1 | sed -e 's/^/CFDISK: /g'
+format_disk0 "$blockdev" "extdump" 2>&1 | sed -e 's/^/CFDISK: /g'
-root_dev=$(map_disk0 $blockdev)-1
-CLEANUP+=("unmap_disk0 $blockdev")
+root_dev=$(map_disk0 "$blockdev")-1
+add_cleanup unmap_disk0 "$blockdev"
echo Creating and configuring filesystem...
-mkfs.ext3 $root_dev 2>&1 | sed -e 's/^/MKFS.EXT3: /g'
+mkfs.ext3 "$root_dev" 2>&1 | sed -e 's/^/MKFS.EXT3: /g'
# The helper vm should never do filesystem checks...
-tune2fs -i 0 -c 0 $root_dev 2>&1 | sed -e 's/^/TUNE2FS: /g'
+tune2fs -i 0 -c 0 "$root_dev" 2>&1 | sed -e 's/^/TUNE2FS: /g'
-TMPDIR=$(mktemp -d)
-CLEANUP+=("rmdir $TMPDIR")
+target=$(mktemp -d)
+add_cleanup rmdir "$target"
-mount $root_dev $TMPDIR
-CLEANUP+=("umount $root_dev")
+mount "$root_dev" "$target"
+add_cleanup umount "$root_dev"
-echo -n "Checking for cached root filesystem file \`$CACHE_FILE'..."
-if [ -f "$CACHE_FILE" ]; then
+echo -n "Checking for cached root filesystem file \`$HELPER_CACHE_FILE'..."
+if [ -f "$HELPER_CACHE_FILE" ]; then
echo "found"
- tar xf "$CACHE_FILE" -C $TMPDIR
+ tar xf "$HELPER_CACHE_FILE" -C "$target"
else
echo "not found"
echo "Debootstraping to create a new root filesystem:"
- debootstrap --arch "$ARCH" --include $EXTRA_PKGS --variant=minbase \
- squeeze $TMPDIR 2>&1 | sed -e 's/^/DEBOOTSTRAP: /g'
+ debootstrap --arch amd64 --include "$HELPER_EXTRA_PKGS" \
+ --variant=minbase squeeze "$target" 2>&1 | sed -e 's/^/DEBOOTSTRAP: /g'
# remove the downloaded debs, as they are no longer needed
- find "$TMPDIR/var/cache/apt/archives" -type f -name '*.deb' -print0 | \
+ find "$target/var/cache/apt/archives" -type f -name '*.deb' -print0 | \
xargs -r0 rm -f
- TMP_CACHE=$(mktemp "${CACHE_FILE}.XXXXXX")
- tar cf "$TMP_CACHE" -C $TMPDIR .
- mv -f "$TMP_CACHE" "$CACHE_FILE"
+ tmp_cache=$(mktemp "$HELPER_CACHE_FILE.XXXXXX")
+ tar cf "$tmp_cache" -C "$target" . || { rm "$tmp_cache"; false; }
+ mv -f "$tmp_cache" "$HELPER_CACHE_FILE"
fi
echo -n "Configuring the helper image..."
-echo snf-image-helper > $TMPDIR/etc/hostname
+echo snf-image-helper > "$target/etc/hostname"
-cat > $TMPDIR/etc/fstab <<EOF
+cat > "$target/etc/fstab" <<EOF
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
echo "done"
echo -n "Extracting kernel..."
-if [ ! -L "$TMPDIR/vmlinuz" -o ! -L "$TMPDIR/vmlinuz" ]; then
-
- log_error "vmlinuz or initrd.img link in root is missing."
- log_error "I don't know how to find a usable kernel/initrd pair."
- exit 1
+if [ ! -L "$target/vmlinuz" -o ! -L "$target/vmlinuz" ]; then
+ echo -e "\033[1;31mfailed\033[0m"
+ log_error "vmlinuz or initrd.img link in root is missing."
+ log_error "I don't know how to find a usable kernel/initrd pair."
+ exit 1
fi
echo "done"
-kernel=$(readlink -en $TMPDIR/vmlinuz)
-initrd=$(readlink -en $TMPDIR/initrd.img)
+kernel=$(readlink -en "$target/vmlinuz")
+initrd=$(readlink -en "$target/initrd.img")
-echo "Moving $(basename $kernel) and $(basename $initrd) to $HELPER_DIR"
-mv $kernel $initrd $HELPER_DIR
+echo "Moving $(basename "$kernel") and $(basename "$initrd") to \`$HELPER_DIR'"
+mv "$kernel" "$initrd" "$HELPER_DIR"
-kernel=$(basename $kernel)
-initrd=$(basename $initrd)
+kernel=$(basename "$kernel")
+initrd=$(basename "$initrd")
-(cd $HELPER_DIR; ln -fs $kernel kernel; ln -fs $initrd initrd)
+(cd "$HELPER_DIR"; ln -fs "$kernel" kernel; ln -fs "$initrd" initrd)
-rm $TMPDIR/vmlinuz $TMPDIR/initrd.img
+rm "$target/vmlinuz" "$target/initrd.img"
echo "Installing snf-image-helper pkg in the new image..."
-cp $HELPER_PKG $TMPDIR/tmp/
-pkg_name=$(basename "$HELPER_PKG")
-CLEANUP+=("rm $TMPDIR/tmp/$pkg_name")
-chroot ${TMPDIR} dpkg -i /tmp/$pkg_name 2>&1 | sed -e 's/^/DPKG: /g'
+cp "$HELPER_PKG" "$target/tmp/"
+pkg_name=$(basename "$HELPER_PKG")
+add_cleanup rm "$target/tmp/$pkg_name"
+chroot "$target" dpkg -i "/tmp/$pkg_name" 2>&1 | sed -e 's/^/DPKG: /g'
-cat > ${TMPDIR}/etc/rc.local <<EOF
+cat > "$target/etc/rc.local" <<EOF
#!/bin/sh -e
#
# rc.local
exit 0
EOF
-chmod +x ${TMPDIR}/etc/rc.local
+chmod +x "$target/etc/rc.local"
echo "done"
cleanup
-mv $helper_img $HELPER_DIR/image
+mv "$helper_img" "$HELPER_DIR/image"
trap - EXIT
projects / snf-image / blobdiff