8 if [ ! -e "$HELPER_PKG" ]; then
9 log_error "Helper package \`$HELPER_PKG' not found."
10 log_error "You need to provide this for the script to work."
15 This program will overwrite the following files:
22 echo -n "Do you want to continue [y/N]? "
24 [ "$(echo -n "$answer" | tr [A-Z] [a-z])" = "y" ] && break
25 if [ -z "$answer" -o "$(echo -n "$answer" | tr [A-Z] [a-z])" = "n" ]; then
31 rm -f "$HELPER_DIR/initrd" "$HELPER_DIR/kernel" "$HELPER_DIR/image"
33 echo -n "Allocating space for helper disk image..."
34 helper_img=$(mktemp "$HELPER_DIR/image.XXXXXX")
36 dd if=/dev/zero of="$helper_img" bs=1k count=400000 &> /dev/null
39 echo "Creating partitions..."
40 blockdev=$("$LOSETUP" -sf $helper_img)
41 add_cleanup "$LOSETUP" -d "$blockdev"
43 sleep 1 # sometimes losetup returns and the device is still busy..
45 format_disk0 "$blockdev" "extdump" 2>&1 | sed -e 's/^/CFDISK: /g'
47 root_dev=$(map_disk0 "$blockdev")-1
48 add_cleanup unmap_disk0 "$blockdev"
50 echo Creating and configuring filesystem...
51 mkfs.ext3 "$root_dev" 2>&1 | sed -e 's/^/MKFS.EXT3: /g'
52 # The helper vm should never do filesystem checks...
53 tune2fs -i 0 -c 0 "$root_dev" 2>&1 | sed -e 's/^/TUNE2FS: /g'
56 add_cleanup rmdir "$target"
58 mount "$root_dev" "$target"
59 add_cleanup umount "$root_dev"
61 echo -n "Checking for cached root filesystem file \`$HELPER_CACHE_FILE'..."
62 if [ -f "$HELPER_CACHE_FILE" ]; then
64 tar xf "$HELPER_CACHE_FILE" -C "$target"
67 echo "Debootstraping to create a new root filesystem:"
69 # Create a policy-rc.d file to deny init script execution
70 mkdir -p "$target/usr/sbin"
71 cat > "$target/usr/sbin/policy-rc.d" <<EOF
75 chmod +x "$target/usr/sbin/policy-rc.d"
77 debootstrap --arch amd64 --include "$HELPER_EXTRA_PKGS" \
78 --variant=minbase stable "$target" "$HELPER_MIRROR" 2>&1 | sed -e 's/^/DEBOOTSTRAP: /g'
80 rm "$target/usr/sbin/policy-rc.d"
82 # remove the downloaded debs, as they are no longer needed
83 find "$target/var/cache/apt/archives" -type f -name '*.deb' -print0 | \
86 tmp_cache=$(mktemp "$HELPER_CACHE_FILE.XXXXXX")
87 tar cf "$tmp_cache" --one-file-system -C "$target" . || { rm "$tmp_cache"; false; }
88 mv -f "$tmp_cache" "$HELPER_CACHE_FILE"
91 echo -n "Configuring the helper image..."
92 echo snf-image-helper > "$target/etc/hostname"
94 cat > "$target/etc/fstab" <<EOF
95 # /etc/fstab: static file system information.
97 # <file system> <mount point> <type> <options> <dump> <pass>
98 /dev/sda1 / ext3 defaults 0 1
99 proc /proc proc defaults 0 0
103 echo -n "Extracting kernel..."
104 if [ ! -L "$target/vmlinuz" -o ! -L "$target/vmlinuz" ]; then
105 echo -e "\033[1;31mfailed\033[0m"
106 log_error "vmlinuz or initrd.img link in root is missing."
107 log_error "I don't know how to find a usable kernel/initrd pair."
112 kernel=$(readlink -en "$target/vmlinuz")
113 initrd=$(readlink -en "$target/initrd.img")
115 echo "Moving $(basename "$kernel") and $(basename "$initrd") to \`$HELPER_DIR'"
116 mv "$kernel" "$initrd" "$HELPER_DIR"
118 kernel=$(basename "$kernel")
119 initrd=$(basename "$initrd")
121 (cd "$HELPER_DIR"; ln -fs "$kernel" kernel; ln -fs "$initrd" initrd)
123 rm "$target/vmlinuz" "$target/initrd.img"
125 echo "Installing snf-image-helper pkg in the new image..."
126 cp "$HELPER_PKG" "$target/tmp/"
127 pkg_name=$(basename "$HELPER_PKG")
128 add_cleanup rm "$target/tmp/$pkg_name"
129 chroot "$target" dpkg -i "/tmp/$pkg_name" 2>&1 | sed -e 's/^/DPKG: /g'
131 cat > "$target/etc/rc.local" <<EOF
136 # This script is executed at the end of each multiuser runlevel.
137 # Make sure that the script will "exit 0" on success or any other
140 # In order to enable or disable this script just change the execution
143 # By default this script does nothing.
145 if ! grep -q snf_image_activate_helper /proc/cmdline; then
146 echo "WARNING: NOT calling snf-image-helper, add snf_image_activate_helper"
147 echo "to the kernel command line if you want to do so."
149 /usr/bin/snf-image-helper --force
155 chmod +x "$target/etc/rc.local"
161 mv "$helper_img" "$HELPER_DIR/image"
165 echo "Files in \`$HELPER_DIR' were updated successfully"
168 # vim: set sta sts=4 shiftwidth=4 sw=4 et ai :