1 files changed, 92 insertions, 0 deletions

diff --git a/src/initrd/samizdat-eject.sh b/src/initrd/samizdat-eject.sh
new file mode 100755
index 0000000..d95a49d
--- /dev/null
+++ b/src/initrd/samizdat-eject.sh
@@ -0,0 +1,92 @@
+#!/bin/sh
+die()
+{
+    printf '%s\n' "$*" >&2
+    exit 1
+}
+
+btrfs_subdevices()
+{
+    local mountpoint="$1"
+    btrfs filesystem show "$mountpoint" | sed -ne 's/^[ \t]*devid.* path //p'
+}
+
+btrfs_subdevice_count()
+{
+    btrfs_subdevices "$1" | wc -l
+}
+
+remove()
+{
+    for dev; do
+        (set -x; btrfs device remove "$dev" /)
+        dmsetup remove "$dev" 2>/dev/null
+        losetup -D
+    done
+}
+
+dm_name()
+{
+    dmsetup info "$1" | sed -ne 's/^Name: *//p'
+}
+
+md_ready()
+{
+    local mountpoint="$1" count dev
+    count=$(mdadm_subdevices /dev/md55|wc -l)
+    [ "$count" = 1 ] || return
+    dev=$(mdadm_subdevices /dev/md55)
+    [ "$(dm_name "$dev")" = samizdatiso ]
+}
+
+copy()
+{
+    temp_target=$(mktemp --tmpdir=/outerfs)
+    mdadm_copy_eject_crypt /dev/md55 "$temp_target"
+}
+
+. mdadm-dup.sh || exit 1
+
+target=$1
+
+if [ ! "$target" ] && mountpoint -q /srv && [ ! -e /srv/samizdat.iso ]; then
+    target=/srv/samizdat.iso
+fi
+
+[ "$target" ] || die "Usage: $0 <target filename>"
+[ ! -e "$target" ] || die "Error: file exists: $target"
+
+if ! mountpoint -q /outerfs; then
+    die "Error: /outerfs is not a mountpoint.  Please mount a safe filesystem to temporarily store the ISO on /outerfs"
+fi
+
+devices=$(btrfs_subdevices /) || exit 1
+
+set --
+seen=
+for dev in $devices; do
+    [ -b "$dev" ] || exit 1
+    case "$dev" in
+        /dev/mapper/loop*) set -- "$@" "$dev" ;;
+        /dev/mapper/samizdatcrypt) seen=y ;;
+    esac
+done
+[ "$seen" ] || set -- # avoid messing up someone's btrfs!
+
+
+
+
+
+
+if ! md_ready; then
+    copy &
+fi
+
+remove "$@"
+
+wait
+
+if [ "$(btrfs_subdevice_count /)" = 1 ] && md_ready; then
+    mdadm_copy_eject /dev/md55 "$target".part &&
+        mv "$target".part "$target"
+fi